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Diffstat (limited to 'contrib/libev/ev.c')
| -rw-r--r-- | contrib/libev/ev.c | 5678 |
1 files changed, 5678 insertions, 0 deletions
diff --git a/contrib/libev/ev.c b/contrib/libev/ev.c new file mode 100644 index 0000000..230445d --- /dev/null +++ b/contrib/libev/ev.c @@ -0,0 +1,5678 @@ +/* + * libev event processing core, watcher management + * + * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modifica- + * tion, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- + * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- + * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- + * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License ("GPL") version 2 or any later version, + * in which case the provisions of the GPL are applicable instead of + * the above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use your + * version of this file under the BSD license, indicate your decision + * by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL. If you do not delete the + * provisions above, a recipient may use your version of this file under + * either the BSD or the GPL. + */ + +/* this big block deduces configuration from config.h */ +#ifndef EV_STANDALONE +# ifdef EV_CONFIG_H +# include EV_CONFIG_H +# else +# include "config.h" +# endif + +#ifdef __GNUC__ +#pragma GCC diagnostic ignored "-Wunused-value" +#endif + +# if HAVE_FLOOR +# ifndef EV_USE_FLOOR +# define EV_USE_FLOOR 1 +# endif +# endif + +# if HAVE_CLOCK_SYSCALL +# ifndef EV_USE_CLOCK_SYSCALL +# define EV_USE_CLOCK_SYSCALL 1 +# ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 0 +# endif +# ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +# endif +# endif +# elif !defined EV_USE_CLOCK_SYSCALL +# define EV_USE_CLOCK_SYSCALL 0 +# endif + +# if HAVE_CLOCK_GETTIME +# ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +# endif +# ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 0 +# endif +# else +# ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 0 +# endif +# ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 0 +# endif +# endif + +# if HAVE_NANOSLEEP +# ifndef EV_USE_NANOSLEEP +# define EV_USE_NANOSLEEP EV_FEATURE_OS +# endif +# else +# undef EV_USE_NANOSLEEP +# define EV_USE_NANOSLEEP 0 +# endif + +# if HAVE_SELECT && HAVE_SYS_SELECT_H +# ifndef EV_USE_SELECT +# define EV_USE_SELECT EV_FEATURE_BACKENDS +# endif +# else +# undef EV_USE_SELECT +# define EV_USE_SELECT 0 +# endif + +# if HAVE_POLL && HAVE_POLL_H +# ifndef EV_USE_POLL +# define EV_USE_POLL EV_FEATURE_BACKENDS +# endif +# else +# undef EV_USE_POLL +# define EV_USE_POLL 0 +# endif + +# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H +# ifndef EV_USE_EPOLL +# define EV_USE_EPOLL EV_FEATURE_BACKENDS +# endif +# else +# undef EV_USE_EPOLL +# define EV_USE_EPOLL 0 +# endif + +# if HAVE_LINUX_AIO_ABI_H +# ifndef EV_USE_LINUXAIO +# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */ +# endif +# else +# undef EV_USE_LINUXAIO +# define EV_USE_LINUXAIO 0 +# endif + +# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T +# ifndef EV_USE_IOURING +# define EV_USE_IOURING EV_FEATURE_BACKENDS +# endif +# else +# undef EV_USE_IOURING +# define EV_USE_IOURING 0 +# endif + +# if HAVE_KQUEUE && HAVE_SYS_EVENT_H +# ifndef EV_USE_KQUEUE +# define EV_USE_KQUEUE EV_FEATURE_BACKENDS +# endif +# else +# undef EV_USE_KQUEUE +# define EV_USE_KQUEUE 0 +# endif + +# if HAVE_PORT_H && HAVE_PORT_CREATE +# ifndef EV_USE_PORT +# define EV_USE_PORT EV_FEATURE_BACKENDS +# endif +# else +# undef EV_USE_PORT +# define EV_USE_PORT 0 +# endif + +# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H +# ifndef EV_USE_INOTIFY +# define EV_USE_INOTIFY EV_FEATURE_OS +# endif +# else +# undef EV_USE_INOTIFY +# define EV_USE_INOTIFY 0 +# endif + +# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H +# ifndef EV_USE_SIGNALFD +# define EV_USE_SIGNALFD EV_FEATURE_OS +# endif +# else +# undef EV_USE_SIGNALFD +# define EV_USE_SIGNALFD 0 +# endif + +# if HAVE_EVENTFD +# ifndef EV_USE_EVENTFD +# define EV_USE_EVENTFD EV_FEATURE_OS +# endif +# else +# undef EV_USE_EVENTFD +# define EV_USE_EVENTFD 0 +# endif + +# if HAVE_SYS_TIMERFD_H && HAVE_TIMERFD +# ifndef EV_USE_TIMERFD +# define EV_USE_TIMERFD EV_FEATURE_OS +# endif +# else +# undef EV_USE_TIMERFD +# define EV_USE_TIMERFD 0 +# endif + +#endif + +/* OS X, in its infinite idiocy, actually HARDCODES + * a limit of 1024 into their select. Where people have brains, + * OS X engineers apparently have a vacuum. Or maybe they were + * ordered to have a vacuum, or they do anything for money. + * This might help. Or not. + * Note that this must be defined early, as other include files + * will rely on this define as well. + */ +#define _DARWIN_UNLIMITED_SELECT 1 + +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <stddef.h> + +#include <stdio.h> + +#include <assert.h> +#include <errno.h> +#include <sys/types.h> +#include <time.h> +#include <limits.h> + +#include <signal.h> + +#ifdef EV_H +# include EV_H +#else +# include "ev.h" +#endif + +#if EV_NO_THREADS +# undef EV_NO_SMP +# define EV_NO_SMP 1 +# undef ECB_NO_THREADS +# define ECB_NO_THREADS 1 +#endif +#if EV_NO_SMP +# undef EV_NO_SMP +# define ECB_NO_SMP 1 +#endif + +#ifndef _WIN32 +# include <sys/time.h> +# include <sys/wait.h> +# include <unistd.h> +#else +# include <io.h> +# define WIN32_LEAN_AND_MEAN +# include <winsock2.h> +# include <windows.h> +# ifndef EV_SELECT_IS_WINSOCKET +# define EV_SELECT_IS_WINSOCKET 1 +# endif +# undef EV_AVOID_STDIO +#endif + +/* this block tries to deduce configuration from header-defined symbols and defaults */ + +/* try to deduce the maximum number of signals on this platform */ +#if defined EV_NSIG +/* use what's provided */ +#elif defined NSIG +# define EV_NSIG (NSIG) +#elif defined _NSIG +# define EV_NSIG (_NSIG) +#elif defined SIGMAX +# define EV_NSIG (SIGMAX+1) +#elif defined SIG_MAX +# define EV_NSIG (SIG_MAX+1) +#elif defined _SIG_MAX +# define EV_NSIG (_SIG_MAX+1) +#elif defined MAXSIG +# define EV_NSIG (MAXSIG+1) +#elif defined MAX_SIG +# define EV_NSIG (MAX_SIG+1) +#elif defined SIGARRAYSIZE +# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ +#elif defined _sys_nsig +# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ +#else +# define EV_NSIG (8 * sizeof (sigset_t) + 1) +#endif + +#ifndef EV_USE_FLOOR +# define EV_USE_FLOOR 0 +#endif + +#ifndef EV_USE_CLOCK_SYSCALL +# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17 +# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS +# else +# define EV_USE_CLOCK_SYSCALL 0 +# endif +#endif + +#if !(_POSIX_TIMERS > 0) +# ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 0 +# endif +# ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 0 +# endif +#endif + +#ifndef EV_USE_MONOTONIC +# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0 +# define EV_USE_MONOTONIC EV_FEATURE_OS +# else +# define EV_USE_MONOTONIC 0 +# endif +#endif + +#ifndef EV_USE_REALTIME +# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL +#endif + +#ifndef EV_USE_NANOSLEEP +# if _POSIX_C_SOURCE >= 199309L +# define EV_USE_NANOSLEEP EV_FEATURE_OS +# else +# define EV_USE_NANOSLEEP 0 +# endif +#endif + +#ifndef EV_USE_SELECT +# define EV_USE_SELECT EV_FEATURE_BACKENDS +#endif + +#ifndef EV_USE_POLL +# ifdef _WIN32 +# define EV_USE_POLL 0 +# else +# define EV_USE_POLL EV_FEATURE_BACKENDS +# endif +#endif + +#ifndef EV_USE_EPOLL +# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) +# define EV_USE_EPOLL EV_FEATURE_BACKENDS +# else +# define EV_USE_EPOLL 0 +# endif +#endif + +#ifndef EV_USE_KQUEUE +# define EV_USE_KQUEUE 0 +#endif + +#ifndef EV_USE_PORT +# define EV_USE_PORT 0 +#endif + +#ifndef EV_USE_LINUXAIO +# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */ +# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */ +# else +# define EV_USE_LINUXAIO 0 +# endif +#endif + +#ifndef EV_USE_IOURING +# if __linux /* later checks might disable again */ +# define EV_USE_IOURING 1 +# else +# define EV_USE_IOURING 0 +# endif +#endif + +#ifndef EV_USE_INOTIFY +# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) +# define EV_USE_INOTIFY EV_FEATURE_OS +# else +# define EV_USE_INOTIFY 0 +# endif +#endif + +#ifndef EV_PID_HASHSIZE +# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1 +#endif + +#ifndef EV_INOTIFY_HASHSIZE +# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1 +#endif + +#ifndef EV_USE_EVENTFD +# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) +# define EV_USE_EVENTFD EV_FEATURE_OS +# else +# define EV_USE_EVENTFD 0 +# endif +#endif + +#ifndef EV_USE_SIGNALFD +# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) +# define EV_USE_SIGNALFD EV_FEATURE_OS +# else +# define EV_USE_SIGNALFD 0 +# endif +#endif + +#ifndef EV_USE_TIMERFD +# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8)) +# define EV_USE_TIMERFD EV_FEATURE_OS +# else +# define EV_USE_TIMERFD 0 +# endif +#endif + +#if 0 /* debugging */ +# define EV_VERIFY 3 +# define EV_USE_4HEAP 1 +# define EV_HEAP_CACHE_AT 1 +#endif + +#ifndef EV_VERIFY +# define EV_VERIFY (EV_FEATURE_API ? 1 : 0) +#endif + +#ifndef EV_USE_4HEAP +# define EV_USE_4HEAP EV_FEATURE_DATA +#endif + +#ifndef EV_HEAP_CACHE_AT +# define EV_HEAP_CACHE_AT EV_FEATURE_DATA +#endif + +#ifdef __ANDROID__ +/* supposedly, android doesn't typedef fd_mask */ +# undef EV_USE_SELECT +# define EV_USE_SELECT 0 +/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */ +# undef EV_USE_CLOCK_SYSCALL +# define EV_USE_CLOCK_SYSCALL 0 +#endif + +/* aix's poll.h seems to cause lots of trouble */ +#ifdef _AIX +/* AIX has a completely broken poll.h header */ +# undef EV_USE_POLL +# define EV_USE_POLL 0 +#endif + +/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ +/* which makes programs even slower. might work on other unices, too. */ +#if EV_USE_CLOCK_SYSCALL +# include <sys/syscall.h> +# ifdef SYS_clock_gettime +# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) +# undef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +# define EV_NEED_SYSCALL 1 +# else +# undef EV_USE_CLOCK_SYSCALL +# define EV_USE_CLOCK_SYSCALL 0 +# endif +#endif + +/* this block fixes any misconfiguration where we know we run into trouble otherwise */ + +#ifndef CLOCK_MONOTONIC +# undef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 0 +#endif + +#ifndef CLOCK_REALTIME +# undef EV_USE_REALTIME +# define EV_USE_REALTIME 0 +#endif + +#if !EV_STAT_ENABLE +# undef EV_USE_INOTIFY +# define EV_USE_INOTIFY 0 +#endif + +#if __linux && EV_USE_IOURING +# include <linux/version.h> +# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0) +# undef EV_USE_IOURING +# define EV_USE_IOURING 0 +# endif +#endif + +#if !EV_USE_NANOSLEEP +/* hp-ux has it in sys/time.h, which we unconditionally include above */ +# if !defined _WIN32 && !defined __hpux +# include <sys/select.h> +# endif +#endif + +#if EV_USE_LINUXAIO +# include <sys/syscall.h> +# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */ +# define EV_NEED_SYSCALL 1 +# else +# undef EV_USE_LINUXAIO +# define EV_USE_LINUXAIO 0 +# endif +#endif + +#if EV_USE_IOURING +# include <sys/syscall.h> +# if !SYS_io_uring_register && __linux && !__alpha +# define SYS_io_uring_setup 425 +# define SYS_io_uring_enter 426 +# define SYS_io_uring_register 427 +# endif +# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */ +# define EV_NEED_SYSCALL 1 +# else +# undef EV_USE_IOURING +# define EV_USE_IOURING 0 +# endif +#endif + +#if EV_USE_INOTIFY +# include <sys/statfs.h> +# include <sys/inotify.h> +/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ +# ifndef IN_DONT_FOLLOW +# undef EV_USE_INOTIFY +# define EV_USE_INOTIFY 0 +# endif +#endif + +#if EV_USE_EVENTFD +/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */ +# include <stdint.h> +# ifndef EFD_NONBLOCK +# define EFD_NONBLOCK O_NONBLOCK +# endif +# ifndef EFD_CLOEXEC +# ifdef O_CLOEXEC +# define EFD_CLOEXEC O_CLOEXEC +# else +# define EFD_CLOEXEC 02000000 +# endif +# endif +EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); +#endif + +#if EV_USE_SIGNALFD +/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */ +# include <stdint.h> +# ifndef SFD_NONBLOCK +# define SFD_NONBLOCK O_NONBLOCK +# endif +# ifndef SFD_CLOEXEC +# ifdef O_CLOEXEC +# define SFD_CLOEXEC O_CLOEXEC +# else +# define SFD_CLOEXEC 02000000 +# endif +# endif +EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags); + +struct signalfd_siginfo +{ + uint32_t ssi_signo; + char pad[128 - sizeof (uint32_t)]; +}; +#endif + +/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */ +#if EV_USE_TIMERFD +# include <sys/timerfd.h> +/* timerfd is only used for periodics */ +# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE +# undef EV_USE_TIMERFD +# define EV_USE_TIMERFD 0 +# endif +#endif + +/*****************************************************************************/ + +#if EV_VERIFY >= 3 +# define EV_FREQUENT_CHECK ev_verify (EV_A) +#else +# define EV_FREQUENT_CHECK do { } while (0) +#endif + +/* + * This is used to work around floating point rounding problems. + * This value is good at least till the year 4000. + */ +#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ +// #define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ + +#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ +#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ +#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */ + +/* find a portable timestamp that is "always" in the future but fits into time_t. + * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t, + * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */ +#define EV_TSTAMP_HUGE \ + (sizeof (time_t) >= 8 ? 10000000000000. \ + : 0 < (time_t)4294967295 ? 4294967295. \ + : 2147483647.) \ + +#ifndef EV_TS_CONST +# define EV_TS_CONST(nv) nv +# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999 +# define EV_TS_FROM_USEC(us) us * 1e-6 +# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) +# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) +# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6) +# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9) +#endif + +/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ +/* ECB.H BEGIN */ +/* + * libecb - http://software.schmorp.de/pkg/libecb + * + * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de> + * Copyright (©) 2011 Emanuele Giaquinta + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modifica- + * tion, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- + * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- + * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- + * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License ("GPL") version 2 or any later version, + * in which case the provisions of the GPL are applicable instead of + * the above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use your + * version of this file under the BSD license, indicate your decision + * by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL. If you do not delete the + * provisions above, a recipient may use your version of this file under + * either the BSD or the GPL. + */ + +#ifndef ECB_H +#define ECB_H + +/* 16 bits major, 16 bits minor */ +#define ECB_VERSION 0x00010008 + +#include <string.h> /* for memcpy */ + +#if defined (_WIN32) && !defined (__MINGW32__) + typedef signed char int8_t; + typedef unsigned char uint8_t; + typedef signed char int_fast8_t; + typedef unsigned char uint_fast8_t; + typedef signed short int16_t; + typedef unsigned short uint16_t; + typedef signed int int_fast16_t; + typedef unsigned int uint_fast16_t; + typedef signed int int32_t; + typedef unsigned int uint32_t; + typedef signed int int_fast32_t; + typedef unsigned int uint_fast32_t; + #if __GNUC__ + typedef signed long long int64_t; + typedef unsigned long long uint64_t; + #else /* _MSC_VER || __BORLANDC__ */ + typedef signed __int64 int64_t; + typedef unsigned __int64 uint64_t; + #endif + typedef int64_t int_fast64_t; + typedef uint64_t uint_fast64_t; + #ifdef _WIN64 + #define ECB_PTRSIZE 8 + typedef uint64_t uintptr_t; + typedef int64_t intptr_t; + #else + #define ECB_PTRSIZE 4 + typedef uint32_t uintptr_t; + typedef int32_t intptr_t; + #endif +#else + #include <inttypes.h> + #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU + #define ECB_PTRSIZE 8 + #else + #define ECB_PTRSIZE 4 + #endif +#endif + +#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) +#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) + +#ifndef ECB_OPTIMIZE_SIZE + #if __OPTIMIZE_SIZE__ + #define ECB_OPTIMIZE_SIZE 1 + #else + #define ECB_OPTIMIZE_SIZE 0 + #endif +#endif + +/* work around x32 idiocy by defining proper macros */ +#if ECB_GCC_AMD64 || ECB_MSVC_AMD64 + #if _ILP32 + #define ECB_AMD64_X32 1 + #else + #define ECB_AMD64 1 + #endif +#endif + +/* many compilers define _GNUC_ to some versions but then only implement + * what their idiot authors think are the "more important" extensions, + * causing enormous grief in return for some better fake benchmark numbers. + * or so. + * we try to detect these and simply assume they are not gcc - if they have + * an issue with that they should have done it right in the first place. + */ +#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ + #define ECB_GCC_VERSION(major,minor) 0 +#else + #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) +#endif + +#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) + +#if __clang__ && defined __has_builtin + #define ECB_CLANG_BUILTIN(x) __has_builtin (x) +#else + #define ECB_CLANG_BUILTIN(x) 0 +#endif + +#if __clang__ && defined __has_extension + #define ECB_CLANG_EXTENSION(x) __has_extension (x) +#else + #define ECB_CLANG_EXTENSION(x) 0 +#endif + +#define ECB_CPP (__cplusplus+0) +#define ECB_CPP11 (__cplusplus >= 201103L) +#define ECB_CPP14 (__cplusplus >= 201402L) +#define ECB_CPP17 (__cplusplus >= 201703L) + +#if ECB_CPP + #define ECB_C 0 + #define ECB_STDC_VERSION 0 +#else + #define ECB_C 1 + #define ECB_STDC_VERSION __STDC_VERSION__ +#endif + +#define ECB_C99 (ECB_STDC_VERSION >= 199901L) +#define ECB_C11 (ECB_STDC_VERSION >= 201112L) +#define ECB_C17 (ECB_STDC_VERSION >= 201710L) + +#if ECB_CPP + #define ECB_EXTERN_C extern "C" + #define ECB_EXTERN_C_BEG ECB_EXTERN_C { + #define ECB_EXTERN_C_END } +#else + #define ECB_EXTERN_C extern + #define ECB_EXTERN_C_BEG + #define ECB_EXTERN_C_END +#endif + +/*****************************************************************************/ + +/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ +/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ + +#if ECB_NO_THREADS + #define ECB_NO_SMP 1 +#endif + +#if ECB_NO_SMP + #define ECB_MEMORY_FENCE do { } while (0) +#endif + +/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ +#if __xlC__ && ECB_CPP + #include <builtins.h> +#endif + +#if 1400 <= _MSC_VER + #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ +#endif + +#ifndef ECB_MEMORY_FENCE + #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 + #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory") + #if __i386 || __i386__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") + #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") + #elif ECB_GCC_AMD64 + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") + #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") + #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") + #elif defined __ARM_ARCH_2__ \ + || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \ + || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \ + || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \ + || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \ + || defined __ARM_ARCH_5TEJ__ + /* should not need any, unless running old code on newer cpu - arm doesn't support that */ + #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ + || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \ + || defined __ARM_ARCH_6T2__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") + #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ + || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") + #elif __aarch64__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") + #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") + #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") + #elif defined __s390__ || defined __s390x__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") + #elif defined __mips__ + /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ + /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ + #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") + #elif defined __alpha__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") + #elif defined __hppa__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") + #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") + #elif defined __ia64__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") + #elif defined __m68k__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") + #elif defined __m88k__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") + #elif defined __sh__ + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") + #elif defined __loongarch__ || __loongarch64 + #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dbar %0 ": : "I"(0) : "memory") + #endif + #endif +#endif + +#ifndef ECB_MEMORY_FENCE + #if ECB_GCC_VERSION(4,7) + /* see comment below (stdatomic.h) about the C11 memory model. */ + #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) + #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) + #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) + #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED) + + #elif ECB_CLANG_EXTENSION(c_atomic) + /* see comment below (stdatomic.h) about the C11 memory model. */ + #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) + #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) + #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) + #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED) + + #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ + #define ECB_MEMORY_FENCE __sync_synchronize () + #elif _MSC_VER >= 1500 /* VC++ 2008 */ + /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ + #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) + #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() + #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ + #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() + #elif _MSC_VER >= 1400 /* VC++ 2005 */ + #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) + #define ECB_MEMORY_FENCE _ReadWriteBarrier () + #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ + #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () + #elif defined _WIN32 + #include <WinNT.h> + #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ + #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 + #include <mbarrier.h> + #define ECB_MEMORY_FENCE __machine_rw_barrier () + #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier () + #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier () + #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier () + #elif __xlC__ + #define ECB_MEMORY_FENCE __sync () + #endif +#endif + +#ifndef ECB_MEMORY_FENCE + #if ECB_C11 && !defined __STDC_NO_ATOMICS__ + /* we assume that these memory fences work on all variables/all memory accesses, */ + /* not just C11 atomics and atomic accesses */ + #include <stdatomic.h> + #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) + #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire) + #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release) + #endif +#endif + +#ifndef ECB_MEMORY_FENCE + #if !ECB_AVOID_PTHREADS + /* + * if you get undefined symbol references to pthread_mutex_lock, + * or failure to find pthread.h, then you should implement + * the ECB_MEMORY_FENCE operations for your cpu/compiler + * OR provide pthread.h and link against the posix thread library + * of your system. + */ + #include <pthread.h> + #define ECB_NEEDS_PTHREADS 1 + #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 + + static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; + #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) + #endif +#endif + +#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE + #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE +#endif + +#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE + #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE +#endif + +#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE + #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */ +#endif + +/*****************************************************************************/ + +#if ECB_CPP + #define ecb_inline static inline +#elif ECB_GCC_VERSION(2,5) + #define ecb_inline static __inline__ +#elif ECB_C99 + #define ecb_inline static inline +#else + #define ecb_inline static +#endif + +#if ECB_GCC_VERSION(3,3) + #define ecb_restrict __restrict__ +#elif ECB_C99 + #define ecb_restrict restrict +#else + #define ecb_restrict +#endif + +typedef int ecb_bool; + +#define ECB_CONCAT_(a, b) a ## b +#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) +#define ECB_STRINGIFY_(a) # a +#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) +#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) + +#define ecb_function_ ecb_inline + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) + #define ecb_attribute(attrlist) __attribute__ (attrlist) +#else + #define ecb_attribute(attrlist) +#endif + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) + #define ecb_is_constant(expr) __builtin_constant_p (expr) +#else + /* possible C11 impl for integral types + typedef struct ecb_is_constant_struct ecb_is_constant_struct; + #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ + + #define ecb_is_constant(expr) 0 +#endif + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) + #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) +#else + #define ecb_expect(expr,value) (expr) +#endif + +#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) + #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) +#else + #define ecb_prefetch(addr,rw,locality) +#endif + +/* no emulation for ecb_decltype */ +#if ECB_CPP11 + // older implementations might have problems with decltype(x)::type, work around it + template<class T> struct ecb_decltype_t { typedef T type; }; + #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type +#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) + #define ecb_decltype(x) __typeof__ (x) +#endif + +#if _MSC_VER >= 1300 + #define ecb_deprecated __declspec (deprecated) +#else + #define ecb_deprecated ecb_attribute ((__deprecated__)) +#endif + +#if _MSC_VER >= 1500 + #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) +#elif ECB_GCC_VERSION(4,5) + #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) +#else + #define ecb_deprecated_message(msg) ecb_deprecated +#endif + +#if _MSC_VER >= 1400 + #define ecb_noinline __declspec (noinline) +#else + #define ecb_noinline ecb_attribute ((__noinline__)) +#endif + +#define ecb_unused ecb_attribute ((__unused__)) +#define ecb_const ecb_attribute ((__const__)) +#define ecb_pure ecb_attribute ((__pure__)) + +#if ECB_C11 || __IBMC_NORETURN + /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ + #define ecb_noreturn _Noreturn +#elif ECB_CPP11 + #define ecb_noreturn [[noreturn]] +#elif _MSC_VER >= 1200 + /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ + #define ecb_noreturn __declspec (noreturn) +#else + #define ecb_noreturn ecb_attribute ((__noreturn__)) +#endif + +#if ECB_GCC_VERSION(4,3) + #define ecb_artificial ecb_attribute ((__artificial__)) + #define ecb_hot ecb_attribute ((__hot__)) + #define ecb_cold ecb_attribute ((__cold__)) +#else + #define ecb_artificial + #define ecb_hot + #define ecb_cold +#endif + +/* put around conditional expressions if you are very sure that the */ +/* expression is mostly true or mostly false. note that these return */ +/* booleans, not the expression. */ +#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) +#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) +/* for compatibility to the rest of the world */ +#define ecb_likely(expr) ecb_expect_true (expr) +#define ecb_unlikely(expr) ecb_expect_false (expr) + +/* count trailing zero bits and count # of one bits */ +#if ECB_GCC_VERSION(3,4) \ + || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ + && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ + && ECB_CLANG_BUILTIN(__builtin_popcount)) + /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ + #define ecb_ld32(x) (__builtin_clz (x) ^ 31) + #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) + #define ecb_ctz32(x) __builtin_ctz (x) + #define ecb_ctz64(x) __builtin_ctzll (x) + #define ecb_popcount32(x) __builtin_popcount (x) + /* no popcountll */ +#else + ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); + ecb_function_ ecb_const int + ecb_ctz32 (uint32_t x) + { +#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) + unsigned long r; + _BitScanForward (&r, x); + return (int)r; +#else + int r = 0; + + x &= ~x + 1; /* this isolates the lowest bit */ + +#if ECB_branchless_on_i386 + r += !!(x & 0xaaaaaaaa) << 0; + r += !!(x & 0xcccccccc) << 1; + r += !!(x & 0xf0f0f0f0) << 2; + r += !!(x & 0xff00ff00) << 3; + r += !!(x & 0xffff0000) << 4; +#else + if (x & 0xaaaaaaaa) r += 1; + if (x & 0xcccccccc) r += 2; + if (x & 0xf0f0f0f0) r += 4; + if (x & 0xff00ff00) r += 8; + if (x & 0xffff0000) r += 16; +#endif + + return r; +#endif + } + + ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); + ecb_function_ ecb_const int + ecb_ctz64 (uint64_t x) + { +#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) + unsigned long r; + _BitScanForward64 (&r, x); + return (int)r; +#else + int shift = x & 0xffffffff ? 0 : 32; + return ecb_ctz32 (x >> shift) + shift; +#endif + } + + ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); + ecb_function_ ecb_const int + ecb_popcount32 (uint32_t x) + { + x -= (x >> 1) & 0x55555555; + x = ((x >> 2) & 0x33333333) + (x & 0x33333333); + x = ((x >> 4) + x) & 0x0f0f0f0f; + x *= 0x01010101; + + return x >> 24; + } + + ecb_function_ ecb_const int ecb_ld32 (uint32_t x); + ecb_function_ ecb_const int ecb_ld32 (uint32_t x) + { +#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) + unsigned long r; + _BitScanReverse (&r, x); + return (int)r; +#else + int r = 0; + + if (x >> 16) { x >>= 16; r += 16; } + if (x >> 8) { x >>= 8; r += 8; } + if (x >> 4) { x >>= 4; r += 4; } + if (x >> 2) { x >>= 2; r += 2; } + if (x >> 1) { r += 1; } + + return r; +#endif + } + + ecb_function_ ecb_const int ecb_ld64 (uint64_t x); + ecb_function_ ecb_const int ecb_ld64 (uint64_t x) + { +#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) + unsigned long r; + _BitScanReverse64 (&r, x); + return (int)r; +#else + int r = 0; + + if (x >> 32) { x >>= 32; r += 32; } + + return r + ecb_ld32 (x); +#endif + } +#endif + +ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); +ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } +ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); +ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } + +ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); +ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) +{ + return ( (x * 0x0802U & 0x22110U) + | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; +} + +ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); +ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) +{ + x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); + x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); + x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); + x = ( x >> 8 ) | ( x << 8); + + return x; +} + +ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); +ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) +{ + x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); + x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); + x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); + x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); + x = ( x >> 16 ) | ( x << 16); + + return x; +} + +/* popcount64 is only available on 64 bit cpus as gcc builtin */ +/* so for this version we are lazy */ +ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); +ecb_function_ ecb_const int +ecb_popcount64 (uint64_t x) +{ + return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); +} + +ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); +ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); +ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); +ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); +ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); +ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); +ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); +ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); + +ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } +ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } +ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } +ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } +ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } +ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } +ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } +ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } + +#if ECB_CPP + +inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); } +inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); } +inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); } +inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); } + +inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); } +inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); } +inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); } +inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); } + +inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); } +inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); } +inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); } +inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); } + +inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); } +inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); } +inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); } +inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); } + +inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); } +inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); } +inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); } + +inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); } +inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); } +inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); } +inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); } + +inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); } +inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); } +inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); } +inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); } + +#endif + +#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) + #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) + #define ecb_bswap16(x) __builtin_bswap16 (x) + #else + #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) + #endif + #define ecb_bswap32(x) __builtin_bswap32 (x) + #define ecb_bswap64(x) __builtin_bswap64 (x) +#elif _MSC_VER + #include <stdlib.h> + #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) + #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) + #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) +#else + ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); + ecb_function_ ecb_const uint16_t + ecb_bswap16 (uint16_t x) + { + return ecb_rotl16 (x, 8); + } + + ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); + ecb_function_ ecb_const uint32_t + ecb_bswap32 (uint32_t x) + { + return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); + } + + ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); + ecb_function_ ecb_const uint64_t + ecb_bswap64 (uint64_t x) + { + return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); + } +#endif + +#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) + #define ecb_unreachable() __builtin_unreachable () +#else + /* this seems to work fine, but gcc always emits a warning for it :/ */ + ecb_inline ecb_noreturn void ecb_unreachable (void); + ecb_inline ecb_noreturn void ecb_unreachable (void) { } +#endif + +/* try to tell the compiler that some condition is definitely true */ +#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 + +ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); +ecb_inline ecb_const uint32_t +ecb_byteorder_helper (void) +{ + /* the union code still generates code under pressure in gcc, */ + /* but less than using pointers, and always seems to */ + /* successfully return a constant. */ + /* the reason why we have this horrible preprocessor mess */ + /* is to avoid it in all cases, at least on common architectures */ + /* or when using a recent enough gcc version (>= 4.6) */ +#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \ + || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__) + #define ECB_LITTLE_ENDIAN 1 + return 0x44332211; +#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \ + || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__) + #define ECB_BIG_ENDIAN 1 + return 0x11223344; +#else + union + { + uint8_t c[4]; + uint32_t u; + } u = { 0x11, 0x22, 0x33, 0x44 }; + return u.u; +#endif +} + +ecb_inline ecb_const ecb_bool ecb_big_endian (void); +ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } +ecb_inline ecb_const ecb_bool ecb_little_endian (void); +ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } + +/*****************************************************************************/ +/* unaligned load/store */ + +ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } +ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } +ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } + +ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } +ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } +ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } + +ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; } +ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; } +ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; } + +ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); } +ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); } +ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); } + +ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); } +ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); } +ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); } + +ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } +ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } +ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } + +ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } +ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } +ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } + +ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); } +ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); } +ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); } + +ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); } +ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); } +ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); } + +ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); } +ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); } +ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); } + +#if ECB_CPP + +inline uint8_t ecb_bswap (uint8_t v) { return v; } +inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); } +inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); } +inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); } + +template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } +template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } +template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; } +template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); } +template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); } +template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; } +template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); } +template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); } + +template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } +template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } +template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; } +template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); } +template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); } +template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); } +template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); } +template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); } + +#endif + +/*****************************************************************************/ + +#if ECB_GCC_VERSION(3,0) || ECB_C99 + #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) +#else + #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) +#endif + +#if ECB_CPP + template<typename T> + static inline T ecb_div_rd (T val, T div) + { + return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; + } + template<typename T> + static inline T ecb_div_ru (T val, T div) + { + return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; + } +#else + #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) + #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) +#endif + +#if ecb_cplusplus_does_not_suck + /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ + template<typename T, int N> + static inline int ecb_array_length (const T (&arr)[N]) + { + return N; + } +#else + #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) +#endif + +/*****************************************************************************/ + +ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); +ecb_function_ ecb_const uint32_t +ecb_binary16_to_binary32 (uint32_t x) +{ + unsigned int s = (x & 0x8000) << (31 - 15); + int e = (x >> 10) & 0x001f; + unsigned int m = x & 0x03ff; + + if (ecb_expect_false (e == 31)) + /* infinity or NaN */ + e = 255 - (127 - 15); + else if (ecb_expect_false (!e)) + { + if (ecb_expect_true (!m)) + /* zero, handled by code below by forcing e to 0 */ + e = 0 - (127 - 15); + else + { + /* subnormal, renormalise */ + unsigned int s = 10 - ecb_ld32 (m); + + m = (m << s) & 0x3ff; /* mask implicit bit */ + e -= s - 1; + } + } + + /* e and m now are normalised, or zero, (or inf or nan) */ + e += 127 - 15; + + return s | (e << 23) | (m << (23 - 10)); +} + +ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); +ecb_function_ ecb_const uint16_t +ecb_binary32_to_binary16 (uint32_t x) +{ + unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ + unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ + unsigned int m = x & 0x007fffff; + + x &= 0x7fffffff; + + /* if it's within range of binary16 normals, use fast path */ + if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) + { + /* mantissa round-to-even */ + m += 0x00000fff + ((m >> (23 - 10)) & 1); + + /* handle overflow */ + if (ecb_expect_false (m >= 0x00800000)) + { + m >>= 1; + e += 1; + } + + return s | (e << 10) | (m >> (23 - 10)); + } + + /* handle large numbers and infinity */ + if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) + return s | 0x7c00; + + /* handle zero, subnormals and small numbers */ + if (ecb_expect_true (x < 0x38800000)) + { + /* zero */ + if (ecb_expect_true (!x)) + return s; + + /* handle subnormals */ + + /* too small, will be zero */ + if (e < (14 - 24)) /* might not be sharp, but is good enough */ + return s; + + m |= 0x00800000; /* make implicit bit explicit */ + + /* very tricky - we need to round to the nearest e (+10) bit value */ + { + unsigned int bits = 14 - e; + unsigned int half = (1 << (bits - 1)) - 1; + unsigned int even = (m >> bits) & 1; + + /* if this overflows, we will end up with a normalised number */ + m = (m + half + even) >> bits; + } + + return s | m; + } + + /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ + m >>= 13; + + return s | 0x7c00 | m | !m; +} + +/*******************************************************************************/ +/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ + +/* basically, everything uses "ieee pure-endian" floating point numbers */ +/* the only noteworthy exception is ancient armle, which uses order 43218765 */ +#if 0 \ + || __i386 || __i386__ \ + || ECB_GCC_AMD64 \ + || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ + || defined __s390__ || defined __s390x__ \ + || defined __mips__ \ + || defined __alpha__ \ + || defined __hppa__ \ + || defined __ia64__ \ + || defined __m68k__ \ + || defined __m88k__ \ + || defined __sh__ \ + || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ + || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ + || defined __aarch64__ + #define ECB_STDFP 1 +#else + #define ECB_STDFP 0 +#endif + +#ifndef ECB_NO_LIBM + + #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ + + /* only the oldest of old doesn't have this one. solaris. */ + #ifdef INFINITY + #define ECB_INFINITY INFINITY + #else + #define ECB_INFINITY HUGE_VAL + #endif + + #ifdef NAN + #define ECB_NAN NAN + #else + #define ECB_NAN ECB_INFINITY + #endif + + #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L + #define ecb_ldexpf(x,e) ldexpf ((x), (e)) + #define ecb_frexpf(x,e) frexpf ((x), (e)) + #else + #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) + #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) + #endif + + /* convert a float to ieee single/binary32 */ + ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); + ecb_function_ ecb_const uint32_t + ecb_float_to_binary32 (float x) + { + uint32_t r; + + #if ECB_STDFP + memcpy (&r, &x, 4); + #else + /* slow emulation, works for anything but -0 */ + uint32_t m; + int e; + + if (x == 0e0f ) return 0x00000000U; + if (x > +3.40282346638528860e+38f) return 0x7f800000U; + if (x < -3.40282346638528860e+38f) return 0xff800000U; + if (x != x ) return 0x7fbfffffU; + + m = ecb_frexpf (x, &e) * 0x1000000U; + + r = m & 0x80000000U; + + if (r) + m = -m; + + if (e <= -126) + { + m &= 0xffffffU; + m >>= (-125 - e); + e = -126; + } + + r |= (e + 126) << 23; + r |= m & 0x7fffffU; + #endif + + return r; + } + + /* converts an ieee single/binary32 to a float */ + ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); + ecb_function_ ecb_const float + ecb_binary32_to_float (uint32_t x) + { + float r; + + #if ECB_STDFP + memcpy (&r, &x, 4); + #else + /* emulation, only works for normals and subnormals and +0 */ + int neg = x >> 31; + int e = (x >> 23) & 0xffU; + + x &= 0x7fffffU; + + if (e) + x |= 0x800000U; + else + e = 1; + + /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ + r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); + + r = neg ? -r : r; + #endif + + return r; + } + + /* convert a double to ieee double/binary64 */ + ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); + ecb_function_ ecb_const uint64_t + ecb_double_to_binary64 (double x) + { + uint64_t r; + + #if ECB_STDFP + memcpy (&r, &x, 8); + #else + /* slow emulation, works for anything but -0 */ + uint64_t m; + int e; + + if (x == 0e0 ) return 0x0000000000000000U; + if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; + if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; + if (x != x ) return 0X7ff7ffffffffffffU; + + m = frexp (x, &e) * 0x20000000000000U; + + r = m & 0x8000000000000000;; + + if (r) + m = -m; + + if (e <= -1022) + { + m &= 0x1fffffffffffffU; + m >>= (-1021 - e); + e = -1022; + } + + r |= ((uint64_t)(e + 1022)) << 52; + r |= m & 0xfffffffffffffU; + #endif + + return r; + } + + /* converts an ieee double/binary64 to a double */ + ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); + ecb_function_ ecb_const double + ecb_binary64_to_double (uint64_t x) + { + double r; + + #if ECB_STDFP + memcpy (&r, &x, 8); + #else + /* emulation, only works for normals and subnormals and +0 */ + int neg = x >> 63; + int e = (x >> 52) & 0x7ffU; + + x &= 0xfffffffffffffU; + + if (e) + x |= 0x10000000000000U; + else + e = 1; + + /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ + r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); + + r = neg ? -r : r; + #endif + + return r; + } + + /* convert a float to ieee half/binary16 */ + ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); + ecb_function_ ecb_const uint16_t + ecb_float_to_binary16 (float x) + { + return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); + } + + /* convert an ieee half/binary16 to float */ + ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); + ecb_function_ ecb_const float + ecb_binary16_to_float (uint16_t x) + { + return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); + } + +#endif + +#endif + +/* ECB.H END */ + +#if ECB_MEMORY_FENCE_NEEDS_PTHREADS +/* if your architecture doesn't need memory fences, e.g. because it is + * single-cpu/core, or if you use libev in a project that doesn't use libev + * from multiple threads, then you can define ECB_NO_THREADS when compiling + * libev, in which cases the memory fences become nops. + * alternatively, you can remove this #error and link against libpthread, + * which will then provide the memory fences. + */ +# error "memory fences not defined for your architecture, please report" +#endif + +#ifndef ECB_MEMORY_FENCE +# define ECB_MEMORY_FENCE do { } while (0) +# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE +# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE +#endif + +#define inline_size ecb_inline + +#if EV_FEATURE_CODE +# define inline_speed ecb_inline +#else +# define inline_speed ecb_noinline static +#endif + +/*****************************************************************************/ +/* raw syscall wrappers */ + +#if EV_NEED_SYSCALL + +#include <sys/syscall.h> + +/* + * define some syscall wrappers for common architectures + * this is mostly for nice looks during debugging, not performance. + * our syscalls return < 0, not == -1, on error. which is good + * enough for linux aio. + * TODO: arm is also common nowadays, maybe even mips and x86 + * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove... + */ +#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE + /* the costly errno access probably kills this for size optimisation */ + + #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \ + ({ \ + long res; \ + register unsigned long r6 __asm__ ("r9" ); \ + register unsigned long r5 __asm__ ("r8" ); \ + register unsigned long r4 __asm__ ("r10"); \ + register unsigned long r3 __asm__ ("rdx"); \ + register unsigned long r2 __asm__ ("rsi"); \ + register unsigned long r1 __asm__ ("rdi"); \ + if (narg >= 6) r6 = (unsigned long)(arg6); \ + if (narg >= 5) r5 = (unsigned long)(arg5); \ + if (narg >= 4) r4 = (unsigned long)(arg4); \ + if (narg >= 3) r3 = (unsigned long)(arg3); \ + if (narg >= 2) r2 = (unsigned long)(arg2); \ + if (narg >= 1) r1 = (unsigned long)(arg1); \ + __asm__ __volatile__ ( \ + "syscall\n\t" \ + : "=a" (res) \ + : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \ + : "cc", "r11", "cx", "memory"); \ + errno = -res; \ + res; \ + }) + +#endif + +#ifdef ev_syscall + #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0) + #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0) + #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0) + #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0) + #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0) + #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0) + #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6) +#else + #define ev_syscall0(nr) syscall (nr) + #define ev_syscall1(nr,arg1) syscall (nr, arg1) + #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2) + #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3) + #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4) + #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5) + #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6) +#endif + +#endif + +/*****************************************************************************/ + +#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) + +#if EV_MINPRI == EV_MAXPRI +# define ABSPRI(w) (((W)w), 0) +#else +# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) +#endif + +#define EMPTY /* required for microsofts broken pseudo-c compiler */ + +typedef ev_watcher *W; +typedef ev_watcher_list *WL; +typedef ev_watcher_time *WT; + +#define ev_active(w) ((W)(w))->active +#define ev_at(w) ((WT)(w))->at + +#if EV_USE_REALTIME +/* sig_atomic_t is used to avoid per-thread variables or locking but still */ +/* giving it a reasonably high chance of working on typical architectures */ +static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ +#endif + +#if EV_USE_MONOTONIC +static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ +static EV_ATOMIC_T monotonic_clock_id; +#endif +static EV_ATOMIC_T have_cheap_timer = 0; + +#ifndef EV_FD_TO_WIN32_HANDLE +# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) +#endif +#ifndef EV_WIN32_HANDLE_TO_FD +# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) +#endif +#ifndef EV_WIN32_CLOSE_FD +# define EV_WIN32_CLOSE_FD(fd) close (fd) +#endif + +#ifdef _WIN32 +# include "ev_win32.c" +#endif + +/*****************************************************************************/ + +#if EV_USE_LINUXAIO +# include <linux/aio_abi.h> /* probably only needed for aio_context_t */ +#endif + +/* define a suitable floor function (only used by periodics atm) */ + +#if EV_USE_FLOOR +# include <math.h> +# define ev_floor(v) floor (v) +#else + +#include <float.h> + +/* a floor() replacement function, should be independent of ev_tstamp type */ +ecb_noinline +static ev_tstamp +ev_floor (ev_tstamp v) +{ + /* the choice of shift factor is not terribly important */ +#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ + const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; +#else + const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; +#endif + + /* special treatment for negative arguments */ + if (ecb_expect_false (v < 0.)) + { + ev_tstamp f = -ev_floor (-v); + + return f - (f == v ? 0 : 1); + } + + /* argument too large for an unsigned long? then reduce it */ + if (ecb_expect_false (v >= shift)) + { + ev_tstamp f; + + if (v == v - 1.) + return v; /* very large numbers are assumed to be integer */ + + f = shift * ev_floor (v * (1. / shift)); + return f + ev_floor (v - f); + } + + /* fits into an unsigned long */ + return (unsigned long)v; +} + +#endif + +/*****************************************************************************/ + +#ifdef __linux +# include <sys/utsname.h> +#endif + +ecb_noinline ecb_cold +static unsigned int +ev_linux_version (void) +{ +#ifdef __linux + unsigned int v = 0; + struct utsname buf; + int i; + char *p = buf.release; + + if (uname (&buf)) + return 0; + + for (i = 3+1; --i; ) + { + unsigned int c = 0; + + for (;;) + { + if (*p >= '0' && *p <= '9') + c = c * 10 + *p++ - '0'; + else + { + p += *p == '.'; + break; + } + } + + v = (v << 8) | c; + } + + return v; +#else + return 0; +#endif +} + +/*****************************************************************************/ + +#if EV_AVOID_STDIO +ecb_noinline ecb_cold +static void +ev_printerr (const char *msg) +{ + write (STDERR_FILENO, msg, strlen (msg)); +} +#endif + +static void (*syserr_cb)(const char *msg) EV_NOEXCEPT; + +ecb_cold +void +ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT +{ + syserr_cb = cb; +} + +ecb_noinline ecb_cold +static void +ev_syserr (const char *msg) +{ + if (!msg) + msg = "(libev) system error"; + + if (syserr_cb) + syserr_cb (msg); + else + { +#if EV_AVOID_STDIO + ev_printerr (msg); + ev_printerr (": "); + ev_printerr (strerror (errno)); + ev_printerr ("\n"); +#else + perror (msg); +#endif + abort (); + } +} + +static void * +ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT +{ + /* some systems, notably openbsd and darwin, fail to properly + * implement realloc (x, 0) (as required by both ansi c-89 and + * the single unix specification, so work around them here. + * recently, also (at least) fedora and debian started breaking it, + * despite documenting it otherwise. + */ + + if (size) + return realloc (ptr, size); + + free (ptr); + return 0; +} + +static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul; + +ecb_cold +void +ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT +{ + alloc = cb; +} + +inline_speed void * +ev_realloc (void *ptr, long size) +{ + ptr = alloc (ptr, size); + + if (!ptr && size) + { +#if EV_AVOID_STDIO + ev_printerr ("(libev) memory allocation failed, aborting.\n"); +#else + fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); +#endif + abort (); + } + + return ptr; +} + +#define ev_malloc(size) ev_realloc (0, (size)) +#define ev_free(ptr) ev_realloc ((ptr), 0) + +/*****************************************************************************/ + +/* set in reify when reification needed */ +#define EV_ANFD_REIFY 1 + +/* file descriptor info structure */ +typedef struct +{ + WL head; + unsigned char events; /* the events watched for */ + unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ + unsigned char emask; /* some backends store the actual kernel mask in here */ + unsigned char eflags; /* flags field for use by backends */ +#if EV_USE_EPOLL + unsigned int egen; /* generation counter to counter epoll bugs */ +#endif +#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP + SOCKET handle; +#endif +#if EV_USE_IOCP + OVERLAPPED or, ow; +#endif +} ANFD; + +/* stores the pending event set for a given watcher */ +typedef struct +{ + W w; + int events; /* the pending event set for the given watcher */ +} ANPENDING; + +#if EV_USE_INOTIFY +/* hash table entry per inotify-id */ +typedef struct +{ + WL head; +} ANFS; +#endif + +/* Heap Entry */ +#if EV_HEAP_CACHE_AT + /* a heap element */ + typedef struct { + ev_tstamp at; + WT w; + } ANHE; + + #define ANHE_w(he) (he).w /* access watcher, read-write */ + #define ANHE_at(he) (he).at /* access cached at, read-only */ + #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ +#else + /* a heap element */ + typedef WT ANHE; + + #define ANHE_w(he) (he) + #define ANHE_at(he) (he)->at + #define ANHE_at_cache(he) +#endif + +#if EV_MULTIPLICITY + + struct ev_loop + { + ev_tstamp ev_rt_now; + #define ev_rt_now ((loop)->ev_rt_now) + #define VAR(name,decl) decl; + #include "ev_vars.h" + #undef VAR + }; + #include "ev_wrap.h" + + static struct ev_loop default_loop_struct; + EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */ + +#else + + EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */ + #define VAR(name,decl) static decl; + #include "ev_vars.h" + #undef VAR + + static int ev_default_loop_ptr; + +#endif + +#if EV_FEATURE_API +# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A) +# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A) +# define EV_INVOKE_PENDING invoke_cb (EV_A) +#else +# define EV_RELEASE_CB (void)0 +# define EV_ACQUIRE_CB (void)0 +# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) +#endif + +#define EVBREAK_RECURSE 0x80 + +/*****************************************************************************/ + +#ifndef EV_HAVE_EV_TIME +ev_tstamp +ev_time (void) EV_NOEXCEPT +{ +#if EV_USE_REALTIME + if (ecb_expect_true (have_realtime)) + { + struct timespec ts; + clock_gettime (CLOCK_REALTIME, &ts); + return EV_TS_GET (ts); + } +#endif + + { + struct timeval tv; + gettimeofday (&tv, 0); + return EV_TV_GET (tv); + } +} +#endif + +inline_size ev_tstamp +get_clock (void) +{ +#if EV_USE_MONOTONIC + if (ecb_expect_true (have_monotonic)) + { + struct timespec ts; + clock_gettime (monotonic_clock_id, &ts); + return ((ev_tstamp)ts.tv_sec) + ts.tv_nsec * 1e-9; + } +#endif + + return ev_time (); +} + +#if EV_MULTIPLICITY +ev_tstamp +ev_now (EV_P) EV_NOEXCEPT +{ + return ev_rt_now; +} +#endif + +void +ev_sleep (ev_tstamp delay) EV_NOEXCEPT +{ + if (delay > EV_TS_CONST (0.)) + { +#if EV_USE_NANOSLEEP + struct timespec ts; + + EV_TS_SET (ts, delay); + nanosleep (&ts, 0); +#elif defined _WIN32 + /* maybe this should round up, as ms is very low resolution */ + /* compared to select (µs) or nanosleep (ns) */ + Sleep ((unsigned long)(EV_TS_TO_MSEC (delay))); +#else + struct timeval tv; + + /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ + /* something not guaranteed by newer posix versions, but guaranteed */ + /* by older ones */ + EV_TV_SET (tv, delay); + select (0, 0, 0, 0, &tv); +#endif + } +} + +/*****************************************************************************/ + +#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ + +/* find a suitable new size for the given array, */ +/* hopefully by rounding to a nice-to-malloc size */ +inline_size int +array_nextsize (int elem, int cur, int cnt) +{ + int ncur = cur + 1; + + do + ncur <<= 1; + while (cnt > ncur); + + /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */ + if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) + { + ncur *= elem; + ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); + ncur = ncur - sizeof (void *) * 4; + ncur /= elem; + } + + return ncur; +} + +ecb_noinline ecb_cold +static void * +array_realloc (int elem, void *base, int *cur, int cnt) +{ + *cur = array_nextsize (elem, *cur, cnt); + return ev_realloc (base, elem * *cur); +} + +#define array_needsize_noinit(base,offset,count) + +#define array_needsize_zerofill(base,offset,count) \ + memset ((void *)(base + offset), 0, sizeof (*(base)) * (count)) + +#define array_needsize(type,base,cur,cnt,init) \ + if (ecb_expect_false ((cnt) > (cur))) \ + { \ + ecb_unused int ocur_ = (cur); \ + (base) = (type *)array_realloc \ + (sizeof (type), (base), &(cur), (cnt)); \ + init ((base), ocur_, ((cur) - ocur_)); \ + } + +#if 0 +#define array_slim(type,stem) \ + if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ + { \ + stem ## max = array_roundsize (stem ## cnt >> 1); \ + base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ + fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ + } +#endif + +#define array_free(stem, idx) \ + ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 + +/*****************************************************************************/ + +/* dummy callback for pending events */ +ecb_noinline +static void +pendingcb (EV_P_ ev_prepare *w, int revents) +{ +} + +ecb_noinline +void +ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT +{ + W w_ = (W)w; + int pri = ABSPRI (w_); + + if (ecb_expect_false (w_->pending)) + pendings [pri][w_->pending - 1].events |= revents; + else + { + w_->pending = ++pendingcnt [pri]; + array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit); + pendings [pri][w_->pending - 1].w = w_; + pendings [pri][w_->pending - 1].events = revents; + } + + pendingpri = NUMPRI - 1; +} + +inline_speed void +feed_reverse (EV_P_ W w) +{ + array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit); + rfeeds [rfeedcnt++] = w; +} + +inline_size void +feed_reverse_done (EV_P_ int revents) +{ + do + ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); + while (rfeedcnt); +} + +inline_speed void +queue_events (EV_P_ W *events, int eventcnt, int type) +{ + int i; + + for (i = 0; i < eventcnt; ++i) + ev_feed_event (EV_A_ events [i], type); +} + +/*****************************************************************************/ + +inline_speed void +fd_event_nocheck (EV_P_ int fd, int revents) +{ + ANFD *anfd = anfds + fd; + ev_io *w; + + for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) + { + int ev = w->events & revents; + + if (ev) + ev_feed_event (EV_A_ (W)w, ev); + } +} + +/* do not submit kernel events for fds that have reify set */ +/* because that means they changed while we were polling for new events */ +inline_speed void +fd_event (EV_P_ int fd, int revents) +{ + ANFD *anfd = anfds + fd; + + if (ecb_expect_true (!anfd->reify)) + fd_event_nocheck (EV_A_ fd, revents); +} + +void +ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT +{ + if (fd >= 0 && fd < anfdmax) + fd_event_nocheck (EV_A_ fd, revents); +} + +/* make sure the external fd watch events are in-sync */ +/* with the kernel/libev internal state */ +inline_size void +fd_reify (EV_P) +{ + int i; + + /* most backends do not modify the fdchanges list in backend_modfiy. + * except io_uring, which has fixed-size buffers which might force us + * to handle events in backend_modify, causing fdchanges to be amended, + * which could result in an endless loop. + * to avoid this, we do not dynamically handle fds that were added + * during fd_reify. that means that for those backends, fdchangecnt + * might be non-zero during poll, which must cause them to not block. + * to not put too much of a burden on other backends, this detail + * needs to be handled in the backend. + */ + int changecnt = fdchangecnt; + +#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP + for (i = 0; i < changecnt; ++i) + { + int fd = fdchanges [i]; + ANFD *anfd = anfds + fd; + + if (anfd->reify & EV__IOFDSET && anfd->head) + { + SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); + + if (handle != anfd->handle) + { + unsigned long arg; + + assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0)); + + /* handle changed, but fd didn't - we need to do it in two steps */ + backend_modify (EV_A_ fd, anfd->events, 0); + anfd->events = 0; + anfd->handle = handle; + } + } + } +#endif + + for (i = 0; i < changecnt; ++i) + { + int fd = fdchanges [i]; + ANFD *anfd = anfds + fd; + ev_io *w; + + unsigned char o_events = anfd->events; + unsigned char o_reify = anfd->reify; + + anfd->reify = 0; + + /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ + { + anfd->events = 0; + + for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) + anfd->events |= (unsigned char)w->events; + + if (o_events != anfd->events) + o_reify = EV__IOFDSET; /* actually |= */ + } + + if (o_reify & EV__IOFDSET) + backend_modify (EV_A_ fd, o_events, anfd->events); + } + + /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added. + * this is a rare case (see beginning comment in this function), so we copy them to the + * front and hope the backend handles this case. + */ + if (ecb_expect_false (fdchangecnt != changecnt)) + memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges)); + + fdchangecnt -= changecnt; +} + +/* something about the given fd changed */ +inline_size +void +fd_change (EV_P_ int fd, int flags) +{ + unsigned char reify = anfds [fd].reify; + anfds [fd].reify = reify | flags; + + if (ecb_expect_true (!reify)) + { + ++fdchangecnt; + array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit); + fdchanges [fdchangecnt - 1] = fd; + } +} + +/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ +inline_speed ecb_cold void +fd_kill (EV_P_ int fd) +{ + ev_io *w; + + while ((w = (ev_io *)anfds [fd].head)) + { + ev_io_stop (EV_A_ w); + ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); + } +} + +/* check whether the given fd is actually valid, for error recovery */ +inline_size ecb_cold int +fd_valid (int fd) +{ +#ifdef _WIN32 + return EV_FD_TO_WIN32_HANDLE (fd) != -1; +#else + return fcntl (fd, F_GETFD) != -1; +#endif +} + +/* called on EBADF to verify fds */ +ecb_noinline ecb_cold +static void +fd_ebadf (EV_P) +{ + int fd; + + for (fd = 0; fd < anfdmax; ++fd) + if (anfds [fd].events) + if (!fd_valid (fd) && errno == EBADF) + fd_kill (EV_A_ fd); +} + +/* called on ENOMEM in select/poll to kill some fds and retry */ +ecb_noinline ecb_cold +static void +fd_enomem (EV_P) +{ + int fd; + + for (fd = anfdmax; fd--; ) + if (anfds [fd].events) + { + fd_kill (EV_A_ fd); + break; + } +} + +/* usually called after fork if backend needs to re-arm all fds from scratch */ +ecb_noinline +static void +fd_rearm_all (EV_P) +{ + int fd; + + for (fd = 0; fd < anfdmax; ++fd) + if (anfds [fd].events) + { + anfds [fd].events = 0; + anfds [fd].emask = 0; + fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); + } +} + +/* used to prepare libev internal fd's */ +/* this is not fork-safe */ +inline_speed void +fd_intern (int fd) +{ +#ifdef _WIN32 + unsigned long arg = 1; + ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); +#else + fcntl (fd, F_SETFD, FD_CLOEXEC); + fcntl (fd, F_SETFL, O_NONBLOCK); +#endif +} + +/*****************************************************************************/ + +/* + * the heap functions want a real array index. array index 0 is guaranteed to not + * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives + * the branching factor of the d-tree. + */ + +/* + * at the moment we allow libev the luxury of two heaps, + * a small-code-size 2-heap one and a ~1.5kb larger 4-heap + * which is more cache-efficient. + * the difference is about 5% with 50000+ watchers. + */ +#if EV_USE_4HEAP + +#define DHEAP 4 +#define HEAP0 (DHEAP - 1) /* index of first element in heap */ +#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) +#define UPHEAP_DONE(p,k) ((p) == (k)) + +/* away from the root */ +inline_speed void +downheap (ANHE *heap, int N, int k) +{ + ANHE he = heap [k]; + ANHE *E = heap + N + HEAP0; + + for (;;) + { + ev_tstamp minat; + ANHE *minpos; + ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; + + /* find minimum child */ + if (ecb_expect_true (pos + DHEAP - 1 < E)) + { + /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); + if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos)); + if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos)); + if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos)); + } + else if (pos < E) + { + /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); + if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos)); + if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos)); + if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos)); + } + else + break; + + if (ANHE_at (he) <= minat) + break; + + heap [k] = *minpos; + ev_active (ANHE_w (*minpos)) = k; + + k = minpos - heap; + } + + heap [k] = he; + ev_active (ANHE_w (he)) = k; +} + +#else /* not 4HEAP */ + +#define HEAP0 1 +#define HPARENT(k) ((k) >> 1) +#define UPHEAP_DONE(p,k) (!(p)) + +/* away from the root */ +inline_speed void +downheap (ANHE *heap, int N, int k) +{ + ANHE he = heap [k]; + + for (;;) + { + int c = k << 1; + + if (c >= N + HEAP0) + break; + + c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) + ? 1 : 0; + + if (ANHE_at (he) <= ANHE_at (heap [c])) + break; + + heap [k] = heap [c]; + ev_active (ANHE_w (heap [k])) = k; + + k = c; + } + + heap [k] = he; + ev_active (ANHE_w (he)) = k; +} +#endif + +/* towards the root */ +inline_speed void +upheap (ANHE *heap, int k) +{ + ANHE he = heap [k]; + + for (;;) + { + int p = HPARENT (k); + + if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) + break; + + heap [k] = heap [p]; + ev_active (ANHE_w (heap [k])) = k; + k = p; + } + + heap [k] = he; + ev_active (ANHE_w (he)) = k; +} + +/* move an element suitably so it is in a correct place */ +inline_size void +adjustheap (ANHE *heap, int N, int k) +{ + if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) + upheap (heap, k); + else + downheap (heap, N, k); +} + +/* rebuild the heap: this function is used only once and executed rarely */ +inline_size void +reheap (ANHE *heap, int N) +{ + int i; + + /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ + /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ + for (i = 0; i < N; ++i) + upheap (heap, i + HEAP0); +} + +/*****************************************************************************/ + +/* associate signal watchers to a signal */ +typedef struct +{ + EV_ATOMIC_T pending; +#if EV_MULTIPLICITY + EV_P; +#endif + WL head; +} ANSIG; + +static ANSIG signals [EV_NSIG - 1]; + +/*****************************************************************************/ + +#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE + +ecb_noinline ecb_cold +static void +evpipe_init (EV_P) +{ + if (!ev_is_active (&pipe_w)) + { + int fds [2]; + +# if EV_USE_EVENTFD + fds [0] = -1; + fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); + if (fds [1] < 0 && errno == EINVAL) + fds [1] = eventfd (0, 0); + + if (fds [1] < 0) +# endif + { + while (pipe (fds)) + ev_syserr ("(libev) error creating signal/async pipe"); + + fd_intern (fds [0]); + } + + evpipe [0] = fds [0]; + + if (evpipe [1] < 0) + evpipe [1] = fds [1]; /* first call, set write fd */ + else + { + /* on subsequent calls, do not change evpipe [1] */ + /* so that evpipe_write can always rely on its value. */ + /* this branch does not do anything sensible on windows, */ + /* so must not be executed on windows */ + + dup2 (fds [1], evpipe [1]); + close (fds [1]); + } + + fd_intern (evpipe [1]); + + ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ); + ev_io_start (EV_A_ &pipe_w); + ev_unref (EV_A); /* watcher should not keep loop alive */ + } +} + +inline_speed void +evpipe_write (EV_P_ EV_ATOMIC_T *flag) +{ + ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */ + + if (ecb_expect_true (*flag)) + return; + + *flag = 1; + ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */ + + pipe_write_skipped = 1; + + ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */ + + if (pipe_write_wanted) + { + int old_errno; + + pipe_write_skipped = 0; + ECB_MEMORY_FENCE_RELEASE; + + old_errno = errno; /* save errno because write will clobber it */ + +#if EV_USE_EVENTFD + if (evpipe [0] < 0) + { + uint64_t counter = 1; + (void) !write (evpipe [1], &counter, sizeof (uint64_t)); + } + else +#endif + { +#ifdef _WIN32 + WSABUF buf; + DWORD sent; + buf.buf = (char *)&buf; + buf.len = 1; + WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0); +#else + (void) !write (evpipe [1], &(evpipe [1]), 1); +#endif + } + + errno = old_errno; + } +} + +/* called whenever the libev signal pipe */ +/* got some events (signal, async) */ +static void +pipecb (EV_P_ ev_io *iow, int revents) +{ + int i; + + if (revents & EV_READ) + { +#if EV_USE_EVENTFD + if (evpipe [0] < 0) + { + uint64_t counter; + (void) !read (evpipe [1], &counter, sizeof (uint64_t)); + } + else +#endif + { + char dummy[4]; +#ifdef _WIN32 + WSABUF buf; + DWORD recvd; + DWORD flags = 0; + buf.buf = dummy; + buf.len = sizeof (dummy); + WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0); +#else + (void) !read (evpipe [0], &dummy, sizeof (dummy)); +#endif + } + } + + pipe_write_skipped = 0; + + ECB_MEMORY_FENCE; /* push out skipped, acquire flags */ + +#if EV_SIGNAL_ENABLE + if (sig_pending) + { + sig_pending = 0; + + ECB_MEMORY_FENCE; + + for (i = EV_NSIG - 1; i--; ) + if (ecb_expect_false (signals [i].pending)) + ev_feed_signal_event (EV_A_ i + 1); + } +#endif + +#if EV_ASYNC_ENABLE + if (async_pending) + { + async_pending = 0; + + ECB_MEMORY_FENCE; + + for (i = asynccnt; i--; ) + if (asyncs [i]->sent) + { + asyncs [i]->sent = 0; + ECB_MEMORY_FENCE_RELEASE; + ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); + } + } +#endif +} + +/*****************************************************************************/ + +void +ev_feed_signal (int signum) EV_NOEXCEPT +{ +#if EV_MULTIPLICITY + EV_P; + ECB_MEMORY_FENCE_ACQUIRE; + EV_A = signals [signum - 1].loop; + + if (!EV_A) + return; +#endif + + signals [signum - 1].pending = 1; + evpipe_write (EV_A_ &sig_pending); +} + +static void +ev_sighandler (int signum) +{ +#ifdef _WIN32 + signal (signum, ev_sighandler); +#endif + + ev_feed_signal (signum); +} + +ecb_noinline +void +ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT +{ + WL w; + + if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG)) + return; + + --signum; + +#if EV_MULTIPLICITY + /* it is permissible to try to feed a signal to the wrong loop */ + /* or, likely more useful, feeding a signal nobody is waiting for */ + + if (ecb_expect_false (signals [signum].loop != EV_A)) + return; +#endif + + signals [signum].pending = 0; + ECB_MEMORY_FENCE_RELEASE; + + for (w = signals [signum].head; w; w = w->next) + ev_feed_event (EV_A_ (W)w, EV_SIGNAL); +} + +#if EV_USE_SIGNALFD +static void +sigfdcb (EV_P_ ev_io *iow, int revents) +{ + struct signalfd_siginfo si[2], *sip; /* these structs are big */ + + for (;;) + { + ssize_t res = read (sigfd, si, sizeof (si)); + + /* not ISO-C, as res might be -1, but works with SuS */ + for (sip = si; (char *)sip < (char *)si + res; ++sip) + ev_feed_signal_event (EV_A_ sip->ssi_signo); + + if (res < (ssize_t)sizeof (si)) + break; + } +} +#endif + +#endif + +/*****************************************************************************/ + +#if EV_CHILD_ENABLE +static WL childs [EV_PID_HASHSIZE]; + +static ev_signal childev; + +#ifndef WIFCONTINUED +# define WIFCONTINUED(status) 0 +#endif + +/* handle a single child status event */ +inline_speed void +child_reap (EV_P_ int chain, int pid, int status) +{ + ev_child *w; + int traced = WIFSTOPPED (status) || WIFCONTINUED (status); + + for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) + { + if ((w->pid == pid || !w->pid) + && (!traced || (w->flags & 1))) + { + ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ + w->rpid = pid; + w->rstatus = status; + ev_feed_event (EV_A_ (W)w, EV_CHILD); + } + } +} + +#ifndef WCONTINUED +# define WCONTINUED 0 +#endif + +/* called on sigchld etc., calls waitpid */ +static void +childcb (EV_P_ ev_signal *sw, int revents) +{ + int pid, status; + + /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ + if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) + if (!WCONTINUED + || errno != EINVAL + || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) + return; + + /* make sure we are called again until all children have been reaped */ + /* we need to do it this way so that the callback gets called before we continue */ + ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); + + child_reap (EV_A_ pid, pid, status); + if ((EV_PID_HASHSIZE) > 1) + child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ +} + +#endif + +/*****************************************************************************/ + +#if EV_USE_TIMERFD + +static void periodics_reschedule (EV_P); + +static void +timerfdcb (EV_P_ ev_io *iow, int revents) +{ + struct itimerspec its = { 0 }; + + its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2; + timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0); + + ev_rt_now = ev_time (); + /* periodics_reschedule only needs ev_rt_now */ + /* but maybe in the future we want the full treatment. */ + /* + now_floor = EV_TS_CONST (0.); + time_update (EV_A_ EV_TSTAMP_HUGE); + */ +#if EV_PERIODIC_ENABLE + periodics_reschedule (EV_A); +#endif +} + +ecb_noinline ecb_cold +static void +evtimerfd_init (EV_P) +{ + if (!ev_is_active (&timerfd_w)) + { + timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC); + + if (timerfd >= 0) + { + fd_intern (timerfd); /* just to be sure */ + + ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ); + ev_set_priority (&timerfd_w, EV_MINPRI); + ev_io_start (EV_A_ &timerfd_w); + ev_unref (EV_A); /* watcher should not keep loop alive */ + + /* (re-) arm timer */ + timerfdcb (EV_A_ 0, 0); + } + } +} + +#endif + +/*****************************************************************************/ + +#if EV_USE_IOCP +# include "ev_iocp.c" +#endif +#if EV_USE_PORT +# include "ev_port.c" +#endif +#if EV_USE_KQUEUE +# include "ev_kqueue.c" +#endif +#if EV_USE_EPOLL +# include "ev_epoll.c" +#endif +#if EV_USE_LINUXAIO +# include "ev_linuxaio.c" +#endif +#if EV_USE_IOURING +# include "ev_iouring.c" +#endif +#if EV_USE_POLL +# include "ev_poll.c" +#endif +#if EV_USE_SELECT +# include "ev_select.c" +#endif + +ecb_cold int +ev_version_major (void) EV_NOEXCEPT +{ + return EV_VERSION_MAJOR; +} + +ecb_cold int +ev_version_minor (void) EV_NOEXCEPT +{ + return EV_VERSION_MINOR; +} + +/* return true if we are running with elevated privileges and should ignore env variables */ +inline_size ecb_cold int +enable_secure (void) +{ +#ifdef _WIN32 + return 0; +#else + return getuid () != geteuid () + || getgid () != getegid (); +#endif +} + +ecb_cold +unsigned int +ev_supported_backends (void) EV_NOEXCEPT +{ + unsigned int flags = 0; + + if (EV_USE_PORT ) flags |= EVBACKEND_PORT; + if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE; + if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; + if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO; + if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */ + if (EV_USE_POLL ) flags |= EVBACKEND_POLL; + if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT; + + return flags; +} + +ecb_cold +unsigned int +ev_recommended_backends (void) EV_NOEXCEPT +{ + unsigned int flags = ev_supported_backends (); + +#ifndef __NetBSD__ + /* kqueue is borked on everything but netbsd apparently */ + /* it usually doesn't work correctly on anything but sockets and pipes */ + flags &= ~EVBACKEND_KQUEUE; +#endif +#ifdef __APPLE__ + /* only select works correctly on that "unix-certified" platform */ + flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ + flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ +#endif +#ifdef __FreeBSD__ + flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ +#endif + + /* TODO: linuxaio is very experimental */ +#if !EV_RECOMMEND_LINUXAIO + flags &= ~EVBACKEND_LINUXAIO; +#endif + /* TODO: linuxaio is super experimental */ +#if !EV_RECOMMEND_IOURING + flags &= ~EVBACKEND_IOURING; +#endif + + return flags; +} + +ecb_cold +unsigned int +ev_embeddable_backends (void) EV_NOEXCEPT +{ + int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING; + + /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ + if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ + flags &= ~EVBACKEND_EPOLL; + + /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */ + + return flags; +} + +unsigned int +ev_backend (EV_P) EV_NOEXCEPT +{ + return backend; +} + +#if EV_FEATURE_API +unsigned int +ev_iteration (EV_P) EV_NOEXCEPT +{ + return loop_count; +} + +unsigned int +ev_depth (EV_P) EV_NOEXCEPT +{ + return loop_depth; +} + +void +ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT +{ + io_blocktime = interval; +} + +void +ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT +{ + timeout_blocktime = interval; +} + +void +ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT +{ + userdata = data; +} + +void * +ev_userdata (EV_P) EV_NOEXCEPT +{ + return userdata; +} + +void +ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT +{ + invoke_cb = invoke_pending_cb; +} + +void +ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT +{ + release_cb = release; + acquire_cb = acquire; +} +#endif + +/* initialise a loop structure, must be zero-initialised */ +ecb_noinline ecb_cold +static void +loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT +{ + if (!backend) + { + origflags = flags; + +#if EV_USE_REALTIME + if (!have_realtime) + { + struct timespec ts; + + if (!clock_gettime (CLOCK_REALTIME, &ts)) + have_realtime = 1; + } +#endif + +#if EV_USE_MONOTONIC + if (!have_monotonic) + { + struct timespec ts; + + if (!clock_gettime (CLOCK_MONOTONIC, &ts)) { + have_monotonic = 1; + monotonic_clock_id = CLOCK_MONOTONIC; +#define CHECK_CLOCK_SOURCE(id) do { \ + if (!clock_gettime ((id), &ts) && \ + !clock_getres ((id), &ts)) { \ + if (ts.tv_sec == 0 && ts.tv_nsec < 10ULL * 1000000) { \ + monotonic_clock_id = (id); \ + have_cheap_timer = 1; \ + } \ + } \ +} while(0) +#ifdef CLOCK_MONOTONIC_COARSE + CHECK_CLOCK_SOURCE(CLOCK_MONOTONIC_COARSE); +#elif defined(CLOCK_MONOTONIC_FAST) /* BSD stuff */ + CHECK_CLOCK_SOURCE(CLOCK_MONOTONIC_FAST); +#elif defined(CLOCK_MONOTONIC_RAW_APPROX) /* OSX stuff */ + CHECK_CLOCK_SOURCE(CLOCK_MONOTONIC_RAW_APPROX); +#endif +#undef CHECK_CLOCK_SOURCE + } + } +#endif + + /* pid check not overridable via env */ +#ifndef _WIN32 + if (flags & EVFLAG_FORKCHECK) + curpid = getpid (); +#endif + + if (!(flags & EVFLAG_NOENV) + && !enable_secure () + && getenv ("LIBEV_FLAGS")) + flags = atoi (getenv ("LIBEV_FLAGS")); + + ev_rt_now = ev_time (); + mn_now = get_clock (); + now_floor = mn_now; + rtmn_diff = ev_rt_now - mn_now; +#if EV_FEATURE_API + invoke_cb = ev_invoke_pending; +#endif + + io_blocktime = 0.; + timeout_blocktime = 0.; + backend = 0; + backend_fd = -1; + sig_pending = 0; +#if EV_ASYNC_ENABLE + async_pending = 0; +#endif + pipe_write_skipped = 0; + pipe_write_wanted = 0; + evpipe [0] = -1; + evpipe [1] = -1; +#if EV_USE_INOTIFY + fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; +#endif +#if EV_USE_SIGNALFD + sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; +#endif +#if EV_USE_TIMERFD + timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2; +#endif + + if (!(flags & EVBACKEND_MASK)) + flags |= ev_recommended_backends (); + +#if EV_USE_IOCP + if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); +#endif +#if EV_USE_PORT + if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); +#endif +#if EV_USE_KQUEUE + if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags); +#endif +#if EV_USE_IOURING + if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags); +#endif +#if EV_USE_LINUXAIO + if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags); +#endif +#if EV_USE_EPOLL + if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); +#endif +#if EV_USE_POLL + if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); +#endif +#if EV_USE_SELECT + if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags); +#endif + + ev_prepare_init (&pending_w, pendingcb); + +#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE + ev_init (&pipe_w, pipecb); + ev_set_priority (&pipe_w, EV_MAXPRI); +#endif + } +} + +EV_INLINE struct ev_loop * +ev_default_loop_uc_ (void) EV_NOEXCEPT +{ + return ev_default_loop_ptr; +} + +EV_INLINE int +ev_is_default_loop (EV_P) EV_NOEXCEPT +{ + return EV_A == EV_DEFAULT_UC; +} + +/* free up a loop structure */ +ecb_cold +void +ev_loop_destroy (EV_P) +{ + int i; + +#if EV_MULTIPLICITY + /* mimic free (0) */ + if (!EV_A) + return; +#endif + +#if EV_CLEANUP_ENABLE + /* queue cleanup watchers (and execute them) */ + if (ecb_expect_false (cleanupcnt)) + { + queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); + EV_INVOKE_PENDING; + } +#endif + +#if EV_CHILD_ENABLE + if (ev_is_default_loop (EV_A) && ev_is_active (&childev)) + { + ev_ref (EV_A); /* child watcher */ + ev_signal_stop (EV_A_ &childev); + } +#endif + + if (ev_is_active (&pipe_w)) + { + /*ev_ref (EV_A);*/ + /*ev_io_stop (EV_A_ &pipe_w);*/ + + if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); + if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]); + } + +#if EV_USE_SIGNALFD + if (ev_is_active (&sigfd_w)) + close (sigfd); +#endif + +#if EV_USE_TIMERFD + if (ev_is_active (&timerfd_w)) + close (timerfd); +#endif + +#if EV_USE_INOTIFY + if (fs_fd >= 0) + close (fs_fd); +#endif + + if (backend_fd >= 0) + close (backend_fd); + +#if EV_USE_IOCP + if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); +#endif +#if EV_USE_PORT + if (backend == EVBACKEND_PORT ) port_destroy (EV_A); +#endif +#if EV_USE_KQUEUE + if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A); +#endif +#if EV_USE_IOURING + if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A); +#endif +#if EV_USE_LINUXAIO + if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A); +#endif +#if EV_USE_EPOLL + if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); +#endif +#if EV_USE_POLL + if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); +#endif +#if EV_USE_SELECT + if (backend == EVBACKEND_SELECT ) select_destroy (EV_A); +#endif + + for (i = NUMPRI; i--; ) + { + array_free (pending, [i]); +#if EV_IDLE_ENABLE + array_free (idle, [i]); +#endif + } + + ev_free (anfds); anfds = 0; anfdmax = 0; + + /* have to use the microsoft-never-gets-it-right macro */ + array_free (rfeed, EMPTY); + array_free (fdchange, EMPTY); + array_free (timer, EMPTY); +#if EV_PERIODIC_ENABLE + array_free (periodic, EMPTY); +#endif +#if EV_FORK_ENABLE + array_free (fork, EMPTY); +#endif +#if EV_CLEANUP_ENABLE + array_free (cleanup, EMPTY); +#endif + array_free (prepare, EMPTY); + array_free (check, EMPTY); +#if EV_ASYNC_ENABLE + array_free (async, EMPTY); +#endif + + backend = 0; + +#if EV_MULTIPLICITY + if (ev_is_default_loop (EV_A)) +#endif + ev_default_loop_ptr = 0; +#if EV_MULTIPLICITY + else + ev_free (EV_A); +#endif +} + +#if EV_USE_INOTIFY +inline_size void infy_fork (EV_P); +#endif + +inline_size void +loop_fork (EV_P) +{ +#if EV_USE_PORT + if (backend == EVBACKEND_PORT ) port_fork (EV_A); +#endif +#if EV_USE_KQUEUE + if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A); +#endif +#if EV_USE_IOURING + if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A); +#endif +#if EV_USE_LINUXAIO + if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A); +#endif +#if EV_USE_EPOLL + if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); +#endif +#if EV_USE_INOTIFY + infy_fork (EV_A); +#endif + + if (postfork != 2) + { + #if EV_USE_SIGNALFD + /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */ + #endif + + #if EV_USE_TIMERFD + if (ev_is_active (&timerfd_w)) + { + ev_ref (EV_A); + ev_io_stop (EV_A_ &timerfd_w); + + close (timerfd); + timerfd = -2; + + evtimerfd_init (EV_A); + /* reschedule periodics, in case we missed something */ + ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM); + } + #endif + + #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE + if (ev_is_active (&pipe_w)) + { + /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ + + ev_ref (EV_A); + ev_io_stop (EV_A_ &pipe_w); + + if (evpipe [0] >= 0) + EV_WIN32_CLOSE_FD (evpipe [0]); + + evpipe_init (EV_A); + /* iterate over everything, in case we missed something before */ + ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); + } + #endif + } + + postfork = 0; +} + +#if EV_MULTIPLICITY + +ecb_cold +struct ev_loop * +ev_loop_new (unsigned int flags) EV_NOEXCEPT +{ + EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); + + memset (EV_A, 0, sizeof (struct ev_loop)); + loop_init (EV_A_ flags); + + if (ev_backend (EV_A)) + return EV_A; + + ev_free (EV_A); + return 0; +} + +#endif /* multiplicity */ + +#if EV_VERIFY +ecb_noinline ecb_cold +static void +verify_watcher (EV_P_ W w) +{ + assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); + + if (w->pending) + assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); +} + +ecb_noinline ecb_cold +static void +verify_heap (EV_P_ ANHE *heap, int N) +{ + int i; + + for (i = HEAP0; i < N + HEAP0; ++i) + { + assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); + assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); + assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); + + verify_watcher (EV_A_ (W)ANHE_w (heap [i])); + } +} + +ecb_noinline ecb_cold +static void +array_verify (EV_P_ W *ws, int cnt) +{ + while (cnt--) + { + assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); + verify_watcher (EV_A_ ws [cnt]); + } +} +#endif + +#if EV_FEATURE_API +void ecb_cold +ev_verify (EV_P) EV_NOEXCEPT +{ +#if EV_VERIFY + int i; + WL w, w2; + + assert (activecnt >= -1); + + assert (fdchangemax >= fdchangecnt); + for (i = 0; i < fdchangecnt; ++i) + assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); + + assert (anfdmax >= 0); + for (i = 0; i < anfdmax; ++i) + { + int j = 0; + + for (w = w2 = anfds [i].head; w; w = w->next) + { + verify_watcher (EV_A_ (W)w); + + if (j++ & 1) + { + assert (("libev: io watcher list contains a loop", w != w2)); + w2 = w2->next; + } + + assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); + assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); + } + } + + assert (timermax >= timercnt); + verify_heap (EV_A_ timers, timercnt); + +#if EV_PERIODIC_ENABLE + assert (periodicmax >= periodiccnt); + verify_heap (EV_A_ periodics, periodiccnt); +#endif + + for (i = NUMPRI; i--; ) + { + assert (pendingmax [i] >= pendingcnt [i]); +#if EV_IDLE_ENABLE + assert (idleall >= 0); + assert (idlemax [i] >= idlecnt [i]); + array_verify (EV_A_ (W *)idles [i], idlecnt [i]); +#endif + } + +#if EV_FORK_ENABLE + assert (forkmax >= forkcnt); + array_verify (EV_A_ (W *)forks, forkcnt); +#endif + +#if EV_CLEANUP_ENABLE + assert (cleanupmax >= cleanupcnt); + array_verify (EV_A_ (W *)cleanups, cleanupcnt); +#endif + +#if EV_ASYNC_ENABLE + assert (asyncmax >= asynccnt); + array_verify (EV_A_ (W *)asyncs, asynccnt); +#endif + +#if EV_PREPARE_ENABLE + assert (preparemax >= preparecnt); + array_verify (EV_A_ (W *)prepares, preparecnt); +#endif + +#if EV_CHECK_ENABLE + assert (checkmax >= checkcnt); + array_verify (EV_A_ (W *)checks, checkcnt); +#endif + +# if 0 +#if EV_CHILD_ENABLE + for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) + for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) +#endif +# endif +#endif +} +#endif + +#if EV_MULTIPLICITY +ecb_cold +struct ev_loop * +#else +int +#endif +ev_default_loop (unsigned int flags) EV_NOEXCEPT +{ + if (!ev_default_loop_ptr) + { +#if EV_MULTIPLICITY + EV_P = ev_default_loop_ptr = &default_loop_struct; +#else + ev_default_loop_ptr = 1; +#endif + + loop_init (EV_A_ flags); + + if (ev_backend (EV_A)) + { +#if EV_CHILD_ENABLE + ev_signal_init (&childev, childcb, SIGCHLD); + ev_set_priority (&childev, EV_MAXPRI); + ev_signal_start (EV_A_ &childev); + ev_unref (EV_A); /* child watcher should not keep loop alive */ +#endif + } + else + ev_default_loop_ptr = 0; + } + + return ev_default_loop_ptr; +} + +void +ev_loop_fork (EV_P) EV_NOEXCEPT +{ + postfork = 1; +} + +/*****************************************************************************/ + +void +ev_invoke (EV_P_ void *w, int revents) +{ + EV_CB_INVOKE ((W)w, revents); +} + +unsigned int +ev_pending_count (EV_P) EV_NOEXCEPT +{ + int pri; + unsigned int count = 0; + + for (pri = NUMPRI; pri--; ) + count += pendingcnt [pri]; + + return count; +} + +ecb_noinline +void +ev_invoke_pending (EV_P) +{ + pendingpri = NUMPRI; + + do + { + --pendingpri; + + /* pendingpri possibly gets modified in the inner loop */ + while (pendingcnt [pendingpri]) + { + ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri]; + + p->w->pending = 0; + EV_CB_INVOKE (p->w, p->events); + EV_FREQUENT_CHECK; + } + } + while (pendingpri); +} + +#if EV_IDLE_ENABLE +/* make idle watchers pending. this handles the "call-idle */ +/* only when higher priorities are idle" logic */ +inline_size void +idle_reify (EV_P) +{ + if (ecb_expect_false (idleall)) + { + int pri; + + for (pri = NUMPRI; pri--; ) + { + if (pendingcnt [pri]) + break; + + if (idlecnt [pri]) + { + queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); + break; + } + } + } +} +#endif + +/* make timers pending */ +inline_size void +timers_reify (EV_P) +{ + EV_FREQUENT_CHECK; + + if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) + { + do + { + ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); + + /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ + + /* first reschedule or stop timer */ + if (w->repeat) + { + ev_at (w) += w->repeat; + if (ev_at (w) < mn_now) + ev_at (w) = mn_now; + + assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.))); + + ANHE_at_cache (timers [HEAP0]); + downheap (timers, timercnt, HEAP0); + } + else + ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ + + EV_FREQUENT_CHECK; + feed_reverse (EV_A_ (W)w); + } + while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); + + feed_reverse_done (EV_A_ EV_TIMER); + } +} + +#if EV_PERIODIC_ENABLE + +ecb_noinline +static void +periodic_recalc (EV_P_ ev_periodic *w) +{ + ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; + ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); + + /* the above almost always errs on the low side */ + while (at <= ev_rt_now) + { + ev_tstamp nat = at + w->interval; + + /* when resolution fails us, we use ev_rt_now */ + if (ecb_expect_false (nat == at)) + { + at = ev_rt_now; + break; + } + + at = nat; + } + + ev_at (w) = at; +} + +/* make periodics pending */ +inline_size void +periodics_reify (EV_P) +{ + EV_FREQUENT_CHECK; + + while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) + { + do + { + ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); + + /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ + + /* first reschedule or stop timer */ + if (w->reschedule_cb) + { + ev_at (w) = w->reschedule_cb (w, ev_rt_now); + + assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); + + ANHE_at_cache (periodics [HEAP0]); + downheap (periodics, periodiccnt, HEAP0); + } + else if (w->interval) + { + periodic_recalc (EV_A_ w); + ANHE_at_cache (periodics [HEAP0]); + downheap (periodics, periodiccnt, HEAP0); + } + else + ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ + + EV_FREQUENT_CHECK; + feed_reverse (EV_A_ (W)w); + } + while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); + + feed_reverse_done (EV_A_ EV_PERIODIC); + } +} + +/* simply recalculate all periodics */ +/* TODO: maybe ensure that at least one event happens when jumping forward? */ +ecb_noinline ecb_cold +static void +periodics_reschedule (EV_P) +{ + int i; + + /* adjust periodics after time jump */ + for (i = HEAP0; i < periodiccnt + HEAP0; ++i) + { + ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); + + if (w->reschedule_cb) + ev_at (w) = w->reschedule_cb (w, ev_rt_now); + else if (w->interval) + periodic_recalc (EV_A_ w); + + ANHE_at_cache (periodics [i]); + } + + reheap (periodics, periodiccnt); +} +#endif + +/* adjust all timers by a given offset */ +ecb_noinline ecb_cold +static void +timers_reschedule (EV_P_ ev_tstamp adjust) +{ + int i; + + for (i = 0; i < timercnt; ++i) + { + ANHE *he = timers + i + HEAP0; + ANHE_w (*he)->at += adjust; + ANHE_at_cache (*he); + } +} + +/* fetch new monotonic and realtime times from the kernel */ +/* also detect if there was a timejump, and act accordingly */ +inline_speed void +time_update (EV_P_ ev_tstamp max_block) +{ +#if EV_USE_MONOTONIC + if (ecb_expect_true (have_monotonic)) + { + int i; + ev_tstamp odiff = rtmn_diff; + + mn_now = get_clock (); + + /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ + /* interpolate in the meantime */ + if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5))) + { + ev_rt_now = rtmn_diff + mn_now; + return; + } + + now_floor = mn_now; + ev_rt_now = ev_time (); + + /* loop a few times, before making important decisions. + * on the choice of "4": one iteration isn't enough, + * in case we get preempted during the calls to + * ev_time and get_clock. a second call is almost guaranteed + * to succeed in that case, though. and looping a few more times + * doesn't hurt either as we only do this on time-jumps or + * in the unlikely event of having been preempted here. + */ + for (i = 4; --i; ) + { + ev_tstamp diff; + rtmn_diff = ev_rt_now - mn_now; + + diff = odiff - rtmn_diff; + + if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP))) + return; /* all is well */ + + ev_rt_now = ev_time (); + mn_now = get_clock (); + now_floor = mn_now; + } + + /* no timer adjustment, as the monotonic clock doesn't jump */ + /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ +# if EV_PERIODIC_ENABLE + periodics_reschedule (EV_A); +# endif + } + else +#endif + { + ev_rt_now = ev_time (); + + if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP))) + { + /* adjust timers. this is easy, as the offset is the same for all of them */ + timers_reschedule (EV_A_ ev_rt_now - mn_now); +#if EV_PERIODIC_ENABLE + periodics_reschedule (EV_A); +#endif + } + + mn_now = ev_rt_now; + } +} + +int +ev_run (EV_P_ int flags) +{ +#if EV_FEATURE_API + ++loop_depth; +#endif + + assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); + + loop_done = EVBREAK_CANCEL; + + EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ + + do + { +#if EV_VERIFY >= 2 + ev_verify (EV_A); +#endif + +#ifndef _WIN32 + if (ecb_expect_false (curpid)) /* penalise the forking check even more */ + if (ecb_expect_false (getpid () != curpid)) + { + curpid = getpid (); + postfork = 1; + } +#endif + +#if EV_FORK_ENABLE + /* we might have forked, so queue fork handlers */ + if (ecb_expect_false (postfork)) + if (forkcnt) + { + queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); + EV_INVOKE_PENDING; + } +#endif + +#if EV_PREPARE_ENABLE + /* queue prepare watchers (and execute them) */ + if (ecb_expect_false (preparecnt)) + { + queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); + EV_INVOKE_PENDING; + } +#endif + + if (ecb_expect_false (loop_done)) + break; + + /* we might have forked, so reify kernel state if necessary */ + if (ecb_expect_false (postfork)) + loop_fork (EV_A); + + /* update fd-related kernel structures */ + fd_reify (EV_A); + + /* calculate blocking time */ + { + ev_tstamp waittime = 0.; + ev_tstamp sleeptime = 0.; + + /* remember old timestamp for io_blocktime calculation */ + ev_tstamp prev_mn_now = mn_now; + + /* update time to cancel out callback processing overhead */ + time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE)); + + /* from now on, we want a pipe-wake-up */ + pipe_write_wanted = 1; + + ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ + + if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) + { + waittime = EV_TS_CONST (MAX_BLOCKTIME); +#if EV_USE_MONOTONIC + if (ecb_expect_true (have_monotonic)) { +#if EV_USE_TIMERFD + /* sleep a lot longer when we can reliably detect timejumps */ + if (ecb_expect_true (timerfd != -1)) + waittime = EV_TS_CONST (MAX_BLOCKTIME2); +#endif +#if !EV_PERIODIC_ENABLE + /* without periodics but with monotonic clock there is no need */ + /* for any time jump detection, so sleep longer */ + + waittime = EV_TS_CONST (MAX_BLOCKTIME2); +#endif + } +#endif /* EV_USE_MONOTONIC */ + if (timercnt) + { + ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; + if (waittime > to) waittime = to; + } + +#if EV_PERIODIC_ENABLE + if (periodiccnt) + { + ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now; + if (waittime > to) waittime = to; + } +#endif + + /* don't let timeouts decrease the waittime below timeout_blocktime */ + if (ecb_expect_false (waittime < timeout_blocktime)) + waittime = timeout_blocktime; + + /* now there are two more special cases left, either we have + * already-expired timers, so we should not sleep, or we have timers + * that expire very soon, in which case we need to wait for a minimum + * amount of time for some event loop backends. + */ + if (ecb_expect_false (waittime < backend_mintime)) + waittime = waittime <= EV_TS_CONST (0.) + ? EV_TS_CONST (0.) + : backend_mintime; + + /* extra check because io_blocktime is commonly 0 */ + if (ecb_expect_false (io_blocktime)) + { + sleeptime = io_blocktime - (mn_now - prev_mn_now); + + if (sleeptime > waittime - backend_mintime) + sleeptime = waittime - backend_mintime; + + if (ecb_expect_true (sleeptime > EV_TS_CONST (0.))) + { + ev_sleep (sleeptime); + waittime -= sleeptime; + } + } + } + +#if EV_FEATURE_API + ++loop_count; +#endif + assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ + backend_poll (EV_A_ waittime); + assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ + + pipe_write_wanted = 0; /* just an optimisation, no fence needed */ + + ECB_MEMORY_FENCE_ACQUIRE; + if (pipe_write_skipped) + { + assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); + ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); + } + + /* update ev_rt_now, do magic */ + time_update (EV_A_ waittime + sleeptime); + } + + /* queue pending timers and reschedule them */ + timers_reify (EV_A); /* relative timers called last */ +#if EV_PERIODIC_ENABLE + periodics_reify (EV_A); /* absolute timers called first */ +#endif + +#if EV_IDLE_ENABLE + /* queue idle watchers unless other events are pending */ + idle_reify (EV_A); +#endif + +#if EV_CHECK_ENABLE + /* queue check watchers, to be executed first */ + if (ecb_expect_false (checkcnt)) + queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); +#endif + + EV_INVOKE_PENDING; + } + while (ecb_expect_true ( + activecnt + && !loop_done + && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) + )); + + if (loop_done == EVBREAK_ONE) + loop_done = EVBREAK_CANCEL; + +#if EV_FEATURE_API + --loop_depth; +#endif + + return activecnt; +} + +void +ev_break (EV_P_ int how) EV_NOEXCEPT +{ + loop_done = how; +} + +void +ev_ref (EV_P) EV_NOEXCEPT +{ + ++activecnt; +} + +void +ev_unref (EV_P) EV_NOEXCEPT +{ + --activecnt; +} + +void +ev_now_update (EV_P) EV_NOEXCEPT +{ + time_update (EV_A_ EV_TSTAMP_HUGE); +} + +void +ev_suspend (EV_P) EV_NOEXCEPT +{ + ev_now_update (EV_A); +} + +void +ev_resume (EV_P) EV_NOEXCEPT +{ + ev_tstamp mn_prev = mn_now; + + ev_now_update (EV_A); + timers_reschedule (EV_A_ mn_now - mn_prev); +#if EV_PERIODIC_ENABLE + /* TODO: really do this? */ + periodics_reschedule (EV_A); +#endif +} + +/*****************************************************************************/ +/* singly-linked list management, used when the expected list length is short */ + +inline_size void +wlist_add (WL *head, WL elem) +{ + elem->next = *head; + *head = elem; +} + +inline_size void +wlist_del (WL *head, WL elem) +{ + while (*head) + { + if (ecb_expect_true (*head == elem)) + { + *head = elem->next; + break; + } + + head = &(*head)->next; + } +} + +/* internal, faster, version of ev_clear_pending */ +inline_speed void +clear_pending (EV_P_ W w) +{ + if (w->pending) + { + pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; + w->pending = 0; + } +} + +int +ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT +{ + W w_ = (W)w; + int pending = w_->pending; + + if (ecb_expect_true (pending)) + { + ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; + p->w = (W)&pending_w; + w_->pending = 0; + return p->events; + } + else + return 0; +} + +inline_size void +pri_adjust (EV_P_ W w) +{ + int pri = ev_priority (w); + pri = pri < EV_MINPRI ? EV_MINPRI : pri; + pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; + ev_set_priority (w, pri); +} + +inline_speed void +ev_start (EV_P_ W w, int active) +{ + pri_adjust (EV_A_ w); + w->active = active; + ev_ref (EV_A); +} + +inline_size void +ev_stop (EV_P_ W w) +{ + ev_unref (EV_A); + w->active = 0; +} + +/*****************************************************************************/ + +ecb_noinline +void +ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT +{ + int fd = w->fd; + + if (ecb_expect_false (ev_is_active (w))) + return; + + assert (("libev: ev_io_start called with negative fd", fd >= 0)); + assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); + +#if EV_VERIFY >= 2 + assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd))); +#endif + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, 1); + array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill); + wlist_add (&anfds[fd].head, (WL)w); + + /* common bug, apparently */ + assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w)); + + fd_change (EV_A_ fd, (w->events & EV__IOFDSET) | EV_ANFD_REIFY); + w->events &= ~EV__IOFDSET; + + EV_FREQUENT_CHECK; +} + +ecb_noinline +void +ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); + +#if EV_VERIFY >= 2 + assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd))); +#endif + EV_FREQUENT_CHECK; + + wlist_del (&anfds[w->fd].head, (WL)w); + ev_stop (EV_A_ (W)w); + + fd_change (EV_A_ w->fd, EV_ANFD_REIFY); + + EV_FREQUENT_CHECK; +} + +ecb_noinline +void +ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + ev_at (w) += mn_now; + + assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); + + EV_FREQUENT_CHECK; + + ++timercnt; + ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); + array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit); + ANHE_w (timers [ev_active (w)]) = (WT)w; + ANHE_at_cache (timers [ev_active (w)]); + upheap (timers, ev_active (w)); + + EV_FREQUENT_CHECK; + + /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ +} + +ecb_noinline +void +ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); + + --timercnt; + + if (ecb_expect_true (active < timercnt + HEAP0)) + { + timers [active] = timers [timercnt + HEAP0]; + adjustheap (timers, timercnt, active); + } + } + + ev_at (w) -= mn_now; + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} + +ecb_noinline +void +ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT +{ + EV_FREQUENT_CHECK; + + clear_pending (EV_A_ (W)w); + + if (ev_is_active (w)) + { + if (w->repeat) + { + ev_at (w) = mn_now + w->repeat; + ANHE_at_cache (timers [ev_active (w)]); + adjustheap (timers, timercnt, ev_active (w)); + } + else + ev_timer_stop (EV_A_ w); + } + else if (w->repeat) + { + ev_at (w) = w->repeat; + ev_timer_start (EV_A_ w); + } + + EV_FREQUENT_CHECK; +} + +ev_tstamp +ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT +{ + return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.)); +} + +#if EV_PERIODIC_ENABLE +ecb_noinline +void +ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + +#if EV_USE_TIMERFD + if (timerfd == -2) + evtimerfd_init (EV_A); +#endif + + if (w->reschedule_cb) + ev_at (w) = w->reschedule_cb (w, ev_rt_now); + else if (w->interval) + { + assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); + periodic_recalc (EV_A_ w); + } + else + ev_at (w) = w->offset; + + EV_FREQUENT_CHECK; + + ++periodiccnt; + ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); + array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit); + ANHE_w (periodics [ev_active (w)]) = (WT)w; + ANHE_at_cache (periodics [ev_active (w)]); + upheap (periodics, ev_active (w)); + + EV_FREQUENT_CHECK; + + /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ +} + +ecb_noinline +void +ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); + + --periodiccnt; + + if (ecb_expect_true (active < periodiccnt + HEAP0)) + { + periodics [active] = periodics [periodiccnt + HEAP0]; + adjustheap (periodics, periodiccnt, active); + } + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} + +ecb_noinline +void +ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT +{ + /* TODO: use adjustheap and recalculation */ + ev_periodic_stop (EV_A_ w); + ev_periodic_start (EV_A_ w); +} +#endif + +#ifndef SA_RESTART +# define SA_RESTART 0 +#endif + +#if EV_SIGNAL_ENABLE + +ecb_noinline +void +ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); + +#if EV_MULTIPLICITY + assert (("libev: a signal must not be attached to two different loops", + !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); + + signals [w->signum - 1].loop = EV_A; + ECB_MEMORY_FENCE_RELEASE; +#endif + + EV_FREQUENT_CHECK; + +#if EV_USE_SIGNALFD + if (sigfd == -2) + { + sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); + if (sigfd < 0 && errno == EINVAL) + sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ + + if (sigfd >= 0) + { + fd_intern (sigfd); /* doing it twice will not hurt */ + + sigemptyset (&sigfd_set); + + ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); + ev_set_priority (&sigfd_w, EV_MAXPRI); + ev_io_start (EV_A_ &sigfd_w); + ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ + } + } + + if (sigfd >= 0) + { + /* TODO: check .head */ + sigaddset (&sigfd_set, w->signum); + sigprocmask (SIG_BLOCK, &sigfd_set, 0); + + signalfd (sigfd, &sigfd_set, 0); + } +#endif + + ev_start (EV_A_ (W)w, 1); + wlist_add (&signals [w->signum - 1].head, (WL)w); + + if (!((WL)w)->next) +# if EV_USE_SIGNALFD + if (sigfd < 0) /*TODO*/ +# endif + { +# ifdef _WIN32 + evpipe_init (EV_A); + + signal (w->signum, ev_sighandler); +# else + struct sigaction sa; + + evpipe_init (EV_A); + + sa.sa_handler = ev_sighandler; + sigfillset (&sa.sa_mask); + sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ + sigaction (w->signum, &sa, 0); + + if (origflags & EVFLAG_NOSIGMASK) + { + sigemptyset (&sa.sa_mask); + sigaddset (&sa.sa_mask, w->signum); + sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); + } +#endif + } + + EV_FREQUENT_CHECK; +} + +ecb_noinline +void +ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + wlist_del (&signals [w->signum - 1].head, (WL)w); + ev_stop (EV_A_ (W)w); + + if (!signals [w->signum - 1].head) + { +#if EV_MULTIPLICITY + signals [w->signum - 1].loop = 0; /* unattach from signal */ +#endif +#if EV_USE_SIGNALFD + if (sigfd >= 0) + { + sigset_t ss; + + sigemptyset (&ss); + sigaddset (&ss, w->signum); + sigdelset (&sigfd_set, w->signum); + + signalfd (sigfd, &sigfd_set, 0); + sigprocmask (SIG_UNBLOCK, &ss, 0); + } + else +#endif + signal (w->signum, SIG_DFL); + } + + EV_FREQUENT_CHECK; +} + +#endif + +#if EV_CHILD_ENABLE + +void +ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT +{ +#if EV_MULTIPLICITY + assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); +#endif + if (ecb_expect_false (ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, 1); + wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); + + EV_FREQUENT_CHECK; +} + +void +ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} + +#endif + +#if EV_STAT_ENABLE + +# ifdef _WIN32 +# undef lstat +# define lstat(a,b) _stati64 (a,b) +# endif + +#define DEF_STAT_INTERVAL 5.0074891 +#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ +#define MIN_STAT_INTERVAL 0.1074891 + +ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents); + +#if EV_USE_INOTIFY + +/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ +# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) + +ecb_noinline +static void +infy_add (EV_P_ ev_stat *w) +{ + w->wd = inotify_add_watch (fs_fd, w->path, + IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY + | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO + | IN_DONT_FOLLOW | IN_MASK_ADD); + + if (w->wd >= 0) + { + struct statfs sfs; + + /* now local changes will be tracked by inotify, but remote changes won't */ + /* unless the filesystem is known to be local, we therefore still poll */ + /* also do poll on <2.6.25, but with normal frequency */ + + if (!fs_2625) + w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; + else if (!statfs (w->path, &sfs) + && (sfs.f_type == 0x1373 /* devfs */ + || sfs.f_type == 0x4006 /* fat */ + || sfs.f_type == 0x4d44 /* msdos */ + || sfs.f_type == 0xEF53 /* ext2/3 */ + || sfs.f_type == 0x72b6 /* jffs2 */ + || sfs.f_type == 0x858458f6 /* ramfs */ + || sfs.f_type == 0x5346544e /* ntfs */ + || sfs.f_type == 0x3153464a /* jfs */ + || sfs.f_type == 0x9123683e /* btrfs */ + || sfs.f_type == 0x52654973 /* reiser3 */ + || sfs.f_type == 0x01021994 /* tmpfs */ + || sfs.f_type == 0x58465342 /* xfs */)) + w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ + else + w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ + } + else + { + /* can't use inotify, continue to stat */ + w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; + + /* if path is not there, monitor some parent directory for speedup hints */ + /* note that exceeding the hardcoded path limit is not a correctness issue, */ + /* but an efficiency issue only */ + if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) + { + char path [4096]; + strcpy (path, w->path); + + do + { + int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF + | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); + + char *pend = strrchr (path, '/'); + + if (!pend || pend == path) + break; + + *pend = 0; + w->wd = inotify_add_watch (fs_fd, path, mask); + } + while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); + } + } + + if (w->wd >= 0) + wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); + + /* now re-arm timer, if required */ + if (ev_is_active (&w->timer)) ev_ref (EV_A); + ev_timer_again (EV_A_ &w->timer); + if (ev_is_active (&w->timer)) ev_unref (EV_A); +} + +ecb_noinline +static void +infy_del (EV_P_ ev_stat *w) +{ + int slot; + int wd = w->wd; + + if (wd < 0) + return; + + w->wd = -2; + slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); + wlist_del (&fs_hash [slot].head, (WL)w); + + /* remove this watcher, if others are watching it, they will rearm */ + inotify_rm_watch (fs_fd, wd); +} + +ecb_noinline +static void +infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) +{ + if (slot < 0) + /* overflow, need to check for all hash slots */ + for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) + infy_wd (EV_A_ slot, wd, ev); + else + { + WL w_; + + for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) + { + ev_stat *w = (ev_stat *)w_; + w_ = w_->next; /* lets us remove this watcher and all before it */ + + if (w->wd == wd || wd == -1) + { + if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) + { + wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); + w->wd = -1; + infy_add (EV_A_ w); /* re-add, no matter what */ + } + + stat_timer_cb (EV_A_ &w->timer, 0); + } + } + } +} + +static void +infy_cb (EV_P_ ev_io *w, int revents) +{ + char buf [EV_INOTIFY_BUFSIZE]; + int ofs; + int len = read (fs_fd, buf, sizeof (buf)); + + for (ofs = 0; ofs < len; ) + { + struct inotify_event *ev = (struct inotify_event *)(buf + ofs); + infy_wd (EV_A_ ev->wd, ev->wd, ev); + ofs += sizeof (struct inotify_event) + ev->len; + } +} + +inline_size ecb_cold +void +ev_check_2625 (EV_P) +{ + /* kernels < 2.6.25 are borked + * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html + */ + if (ev_linux_version () < 0x020619) + return; + + fs_2625 = 1; +} + +inline_size int +infy_newfd (void) +{ +#if defined IN_CLOEXEC && defined IN_NONBLOCK + int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); + if (fd >= 0) + return fd; +#endif + return inotify_init (); +} + +inline_size void +infy_init (EV_P) +{ + if (fs_fd != -2) + return; + + fs_fd = -1; + + ev_check_2625 (EV_A); + + fs_fd = infy_newfd (); + + if (fs_fd >= 0) + { + fd_intern (fs_fd); + ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); + ev_set_priority (&fs_w, EV_MAXPRI); + ev_io_start (EV_A_ &fs_w); + ev_unref (EV_A); + } +} + +inline_size void +infy_fork (EV_P) +{ + int slot; + + if (fs_fd < 0) + return; + + ev_ref (EV_A); + ev_io_stop (EV_A_ &fs_w); + close (fs_fd); + fs_fd = infy_newfd (); + + if (fs_fd >= 0) + { + fd_intern (fs_fd); + ev_io_set (&fs_w, fs_fd, EV_READ); + ev_io_start (EV_A_ &fs_w); + ev_unref (EV_A); + } + + for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) + { + WL w_ = fs_hash [slot].head; + fs_hash [slot].head = 0; + + while (w_) + { + ev_stat *w = (ev_stat *)w_; + w_ = w_->next; /* lets us add this watcher */ + + w->wd = -1; + + if (fs_fd >= 0) + infy_add (EV_A_ w); /* re-add, no matter what */ + else + { + w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; + if (ev_is_active (&w->timer)) ev_ref (EV_A); + ev_timer_again (EV_A_ &w->timer); + if (ev_is_active (&w->timer)) ev_unref (EV_A); + } + } + } +} + +#endif + +#ifdef _WIN32 +# define EV_LSTAT(p,b) _stati64 (p, b) +#else +# define EV_LSTAT(p,b) lstat (p, b) +#endif + +void +ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT +{ + if (lstat (w->path, &w->attr) < 0) + w->attr.st_nlink = 0; + else if (!w->attr.st_nlink) + w->attr.st_nlink = 1; +} + +ecb_noinline +static void +stat_timer_cb (EV_P_ ev_timer *w_, int revents) +{ + ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); + + ev_statdata prev = w->attr; + ev_stat_stat (EV_A_ w); + + /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ + if ( + prev.st_dev != w->attr.st_dev + || prev.st_ino != w->attr.st_ino + || prev.st_mode != w->attr.st_mode + || prev.st_nlink != w->attr.st_nlink + || prev.st_uid != w->attr.st_uid + || prev.st_gid != w->attr.st_gid + || prev.st_rdev != w->attr.st_rdev + || prev.st_size != w->attr.st_size + /* || prev.st_atime != w->attr.st_atime */ /* Rspamd: to avoid constant maps reload */ + || prev.st_mtime != w->attr.st_mtime + || prev.st_ctime != w->attr.st_ctime + ) { + /* we only update w->prev on actual differences */ + /* in case we test more often than invoke the callback, */ + /* to ensure that prev is always different to attr */ + w->prev = prev; + + #if EV_USE_INOTIFY + if (fs_fd >= 0) + { + infy_del (EV_A_ w); + infy_add (EV_A_ w); + ev_stat_stat (EV_A_ w); /* avoid race... */ + } + #endif + + ev_feed_event (EV_A_ w, EV_STAT); + } +} + +void +ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + ev_stat_stat (EV_A_ w); + + if (w->interval < MIN_STAT_INTERVAL && w->interval) + w->interval = MIN_STAT_INTERVAL; + + ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); + ev_set_priority (&w->timer, ev_priority (w)); + +#if EV_USE_INOTIFY + infy_init (EV_A); + + if (fs_fd >= 0) + infy_add (EV_A_ w); + else +#endif + { + ev_timer_again (EV_A_ &w->timer); + ev_unref (EV_A); + } + + ev_start (EV_A_ (W)w, 1); + + EV_FREQUENT_CHECK; +} + +void +ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + +#if EV_USE_INOTIFY + infy_del (EV_A_ w); +#endif + + if (ev_is_active (&w->timer)) + { + ev_ref (EV_A); + ev_timer_stop (EV_A_ &w->timer); + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_IDLE_ENABLE +void +ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + pri_adjust (EV_A_ (W)w); + + EV_FREQUENT_CHECK; + + { + int active = ++idlecnt [ABSPRI (w)]; + + ++idleall; + ev_start (EV_A_ (W)w, active); + + array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit); + idles [ABSPRI (w)][active - 1] = w; + } + + EV_FREQUENT_CHECK; +} + +void +ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; + ev_active (idles [ABSPRI (w)][active - 1]) = active; + + ev_stop (EV_A_ (W)w); + --idleall; + } + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_PREPARE_ENABLE +void +ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, ++preparecnt); + array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit); + prepares [preparecnt - 1] = w; + + EV_FREQUENT_CHECK; +} + +void +ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + prepares [active - 1] = prepares [--preparecnt]; + ev_active (prepares [active - 1]) = active; + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_CHECK_ENABLE +void +ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, ++checkcnt); + array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit); + checks [checkcnt - 1] = w; + + EV_FREQUENT_CHECK; +} + +void +ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + checks [active - 1] = checks [--checkcnt]; + ev_active (checks [active - 1]) = active; + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_EMBED_ENABLE +ecb_noinline +void +ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT +{ + ev_run (w->other, EVRUN_NOWAIT); +} + +static void +embed_io_cb (EV_P_ ev_io *io, int revents) +{ + ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); + + if (ev_cb (w)) + ev_feed_event (EV_A_ (W)w, EV_EMBED); + else + ev_run (w->other, EVRUN_NOWAIT); +} + +static void +embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) +{ + ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); + + { + EV_P = w->other; + + while (fdchangecnt) + { + fd_reify (EV_A); + ev_run (EV_A_ EVRUN_NOWAIT); + } + } +} + +#if EV_FORK_ENABLE +static void +embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) +{ + ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); + + ev_embed_stop (EV_A_ w); + + { + EV_P = w->other; + + ev_loop_fork (EV_A); + ev_run (EV_A_ EVRUN_NOWAIT); + } + + ev_embed_start (EV_A_ w); +} +#endif + +#if 0 +static void +embed_idle_cb (EV_P_ ev_idle *idle, int revents) +{ + ev_idle_stop (EV_A_ idle); +} +#endif + +void +ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + { + EV_P = w->other; + assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); + ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); + } + + EV_FREQUENT_CHECK; + + ev_set_priority (&w->io, ev_priority (w)); + ev_io_start (EV_A_ &w->io); + + ev_prepare_init (&w->prepare, embed_prepare_cb); + ev_set_priority (&w->prepare, EV_MINPRI); + ev_prepare_start (EV_A_ &w->prepare); + +#if EV_FORK_ENABLE + ev_fork_init (&w->fork, embed_fork_cb); + ev_fork_start (EV_A_ &w->fork); +#endif + + /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ + + ev_start (EV_A_ (W)w, 1); + + EV_FREQUENT_CHECK; +} + +void +ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + ev_io_stop (EV_A_ &w->io); + ev_prepare_stop (EV_A_ &w->prepare); +#if EV_FORK_ENABLE + ev_fork_stop (EV_A_ &w->fork); +#endif + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_FORK_ENABLE +void +ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, ++forkcnt); + array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit); + forks [forkcnt - 1] = w; + + EV_FREQUENT_CHECK; +} + +void +ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + forks [active - 1] = forks [--forkcnt]; + ev_active (forks [active - 1]) = active; + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_CLEANUP_ENABLE +void +ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, ++cleanupcnt); + array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit); + cleanups [cleanupcnt - 1] = w; + + /* cleanup watchers should never keep a refcount on the loop */ + ev_unref (EV_A); + EV_FREQUENT_CHECK; +} + +void +ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + ev_ref (EV_A); + + { + int active = ev_active (w); + + cleanups [active - 1] = cleanups [--cleanupcnt]; + ev_active (cleanups [active - 1]) = active; + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} +#endif + +#if EV_ASYNC_ENABLE +void +ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT +{ + if (ecb_expect_false (ev_is_active (w))) + return; + + w->sent = 0; + + evpipe_init (EV_A); + + EV_FREQUENT_CHECK; + + ev_start (EV_A_ (W)w, ++asynccnt); + array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit); + asyncs [asynccnt - 1] = w; + + EV_FREQUENT_CHECK; +} + +void +ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT +{ + clear_pending (EV_A_ (W)w); + if (ecb_expect_false (!ev_is_active (w))) + return; + + EV_FREQUENT_CHECK; + + { + int active = ev_active (w); + + asyncs [active - 1] = asyncs [--asynccnt]; + ev_active (asyncs [active - 1]) = active; + } + + ev_stop (EV_A_ (W)w); + + EV_FREQUENT_CHECK; +} + +void +ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT +{ + w->sent = 1; + evpipe_write (EV_A_ &async_pending); +} +#endif + +/*****************************************************************************/ + +struct ev_once +{ + ev_io io; + ev_timer to; + void (*cb)(int revents, void *arg); + void *arg; +}; + +static void +once_cb (EV_P_ struct ev_once *once, int revents) +{ + void (*cb)(int revents, void *arg) = once->cb; + void *arg = once->arg; + + ev_io_stop (EV_A_ &once->io); + ev_timer_stop (EV_A_ &once->to); + ev_free (once); + + cb (revents, arg); +} + +static void +once_cb_io (EV_P_ ev_io *w, int revents) +{ + struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); + + once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); +} + +static void +once_cb_to (EV_P_ ev_timer *w, int revents) +{ + struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); + + once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); +} + +void +ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT +{ + struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); + + once->cb = cb; + once->arg = arg; + + ev_init (&once->io, once_cb_io); + if (fd >= 0) + { + ev_io_set (&once->io, fd, events); + ev_io_start (EV_A_ &once->io); + } + + ev_init (&once->to, once_cb_to); + if (timeout >= 0.) + { + ev_timer_set (&once->to, timeout, 0.); + ev_timer_start (EV_A_ &once->to); + } +} +/*****************************************************************************/ + +#if EV_WALK_ENABLE +ecb_cold +void +ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT +{ + int i, j; + ev_watcher_list *wl, *wn; + + if (types & (EV_IO | EV_EMBED)) + for (i = 0; i < anfdmax; ++i) + for (wl = anfds [i].head; wl; ) + { + wn = wl->next; + +#if EV_EMBED_ENABLE + if (ev_cb ((ev_io *)wl) == embed_io_cb) + { + if (types & EV_EMBED) + cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); + } + else +#endif +#if EV_USE_INOTIFY + if (ev_cb ((ev_io *)wl) == infy_cb) + ; + else +#endif + if ((ev_io *)wl != &pipe_w) + if (types & EV_IO) + cb (EV_A_ EV_IO, wl); + + wl = wn; + } + + if (types & (EV_TIMER | EV_STAT)) + for (i = timercnt + HEAP0; i-- > HEAP0; ) +#if EV_STAT_ENABLE + /*TODO: timer is not always active*/ + if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) + { + if (types & EV_STAT) + cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); + } + else +#endif + if (types & EV_TIMER) + cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); + +#if EV_PERIODIC_ENABLE + if (types & EV_PERIODIC) + for (i = periodiccnt + HEAP0; i-- > HEAP0; ) + cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); +#endif + +#if EV_IDLE_ENABLE + if (types & EV_IDLE) + for (j = NUMPRI; j--; ) + for (i = idlecnt [j]; i--; ) + cb (EV_A_ EV_IDLE, idles [j][i]); +#endif + +#if EV_FORK_ENABLE + if (types & EV_FORK) + for (i = forkcnt; i--; ) + if (ev_cb (forks [i]) != embed_fork_cb) + cb (EV_A_ EV_FORK, forks [i]); +#endif + +#if EV_ASYNC_ENABLE + if (types & EV_ASYNC) + for (i = asynccnt; i--; ) + cb (EV_A_ EV_ASYNC, asyncs [i]); +#endif + +#if EV_PREPARE_ENABLE + if (types & EV_PREPARE) + for (i = preparecnt; i--; ) +# if EV_EMBED_ENABLE + if (ev_cb (prepares [i]) != embed_prepare_cb) +# endif + cb (EV_A_ EV_PREPARE, prepares [i]); +#endif + +#if EV_CHECK_ENABLE + if (types & EV_CHECK) + for (i = checkcnt; i--; ) + cb (EV_A_ EV_CHECK, checks [i]); +#endif + +#if EV_SIGNAL_ENABLE + if (types & EV_SIGNAL) + for (i = 0; i < EV_NSIG - 1; ++i) + for (wl = signals [i].head; wl; ) + { + wn = wl->next; + cb (EV_A_ EV_SIGNAL, wl); + wl = wn; + } +#endif + +#if EV_CHILD_ENABLE + if (types & EV_CHILD) + for (i = (EV_PID_HASHSIZE); i--; ) + for (wl = childs [i]; wl; ) + { + wn = wl->next; + cb (EV_A_ EV_CHILD, wl); + wl = wn; + } +#endif +// EV_STAT 0x00001000 /* stat data changed */ +// EV_EMBED 0x00010000 /* embedded event loop needs sweep */ +} +#endif +void +ev_now_update_if_cheap (EV_P) EV_NOEXCEPT +{ + if (have_cheap_timer) time_update (EV_A_ 1e100); +} + +int +ev_active_cnt (EV_P) EV_NOEXCEPT +{ + return activecnt; +} + +#if EV_MULTIPLICITY + #include "ev_wrap.h" +#endif + |