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Diffstat (limited to 'contrib/libev/ev.h')
| -rw-r--r-- | contrib/libev/ev.h | 849 |
1 files changed, 849 insertions, 0 deletions
diff --git a/contrib/libev/ev.h b/contrib/libev/ev.h new file mode 100644 index 0000000..7135a08 --- /dev/null +++ b/contrib/libev/ev.h @@ -0,0 +1,849 @@ +/* + * libev native API header + * + * Copyright (c) 2007-2020 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. + */ + +#ifndef EV_H_ +#define EV_H_ + +#ifdef __cplusplus +# define EV_CPP(x) x +# if __cplusplus >= 201103L +# define EV_NOEXCEPT noexcept +# else +# define EV_NOEXCEPT +# endif +#else +# define EV_CPP(x) +# define EV_NOEXCEPT +#endif +#define EV_THROW EV_NOEXCEPT /* pre-4.25, do not use in new code */ + +EV_CPP(extern "C" {) + +/*****************************************************************************/ + +/* pre-4.0 compatibility */ +#ifndef EV_COMPAT3 +# define EV_COMPAT3 1 +#endif + +#ifndef EV_FEATURES +# if defined __OPTIMIZE_SIZE__ +# define EV_FEATURES 0x7c +# else +# define EV_FEATURES 0x7f +# endif +#endif + +#define EV_FEATURE_CODE ((EV_FEATURES) & 1) +#define EV_FEATURE_DATA ((EV_FEATURES) & 2) +#define EV_FEATURE_CONFIG ((EV_FEATURES) & 4) +#define EV_FEATURE_API ((EV_FEATURES) & 8) +#define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16) +#define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32) +#define EV_FEATURE_OS ((EV_FEATURES) & 64) + +/* these priorities are inclusive, higher priorities will be invoked earlier */ +#ifndef EV_MINPRI +# define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0) +#endif +#ifndef EV_MAXPRI +# define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0) +#endif + +#ifndef EV_MULTIPLICITY +# define EV_MULTIPLICITY EV_FEATURE_CONFIG +#endif + +#ifndef EV_PERIODIC_ENABLE +# define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_STAT_ENABLE +# define EV_STAT_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_PREPARE_ENABLE +# define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_CHECK_ENABLE +# define EV_CHECK_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_IDLE_ENABLE +# define EV_IDLE_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_FORK_ENABLE +# define EV_FORK_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_CLEANUP_ENABLE +# define EV_CLEANUP_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_SIGNAL_ENABLE +# define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_CHILD_ENABLE +# ifdef _WIN32 +# define EV_CHILD_ENABLE 0 +# else +# define EV_CHILD_ENABLE EV_FEATURE_WATCHERS +#endif +#endif + +#ifndef EV_ASYNC_ENABLE +# define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_EMBED_ENABLE +# define EV_EMBED_ENABLE EV_FEATURE_WATCHERS +#endif + +#ifndef EV_WALK_ENABLE +# define EV_WALK_ENABLE 0 /* not yet */ +#endif + +/*****************************************************************************/ + +#if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE +# undef EV_SIGNAL_ENABLE +# define EV_SIGNAL_ENABLE 1 +#endif + +/*****************************************************************************/ + +#ifndef EV_TSTAMP_T +# define EV_TSTAMP_T double +#endif +typedef EV_TSTAMP_T ev_tstamp; + +#include <string.h> /* for memmove */ + +#ifndef EV_ATOMIC_T +# include <signal.h> +# define EV_ATOMIC_T sig_atomic_t volatile +#endif + +#if EV_STAT_ENABLE +# ifdef _WIN32 +# include <time.h> +# include <sys/types.h> +# endif +# include <sys/stat.h> +#endif + +/* support multiple event loops? */ +#if EV_MULTIPLICITY +struct ev_loop; +# define EV_P struct ev_loop *loop /* a loop as sole parameter in a declaration */ +# define EV_P_ EV_P, /* a loop as first of multiple parameters */ +# define EV_A loop /* a loop as sole argument to a function call */ +# define EV_A_ EV_A, /* a loop as first of multiple arguments */ +# define EV_DEFAULT_UC ev_default_loop_uc_ () /* the default loop, if initialised, as sole arg */ +# define EV_DEFAULT_UC_ EV_DEFAULT_UC, /* the default loop as first of multiple arguments */ +# define EV_DEFAULT ev_default_loop (0) /* the default loop as sole arg */ +# define EV_DEFAULT_ EV_DEFAULT, /* the default loop as first of multiple arguments */ +#else +# define EV_P void +# define EV_P_ +# define EV_A +# define EV_A_ +# define EV_DEFAULT +# define EV_DEFAULT_ +# define EV_DEFAULT_UC +# define EV_DEFAULT_UC_ +# undef EV_EMBED_ENABLE +#endif + +/* EV_INLINE is used for functions in header files */ +#if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3 +# define EV_INLINE static inline +#else +# define EV_INLINE static +#endif + +#ifdef EV_API_STATIC +# define EV_API_DECL static +#else +# define EV_API_DECL extern +#endif + +/* EV_PROTOTYPES can be used to switch of prototype declarations */ +#ifndef EV_PROTOTYPES +# define EV_PROTOTYPES 1 +#endif + +/*****************************************************************************/ + +#define EV_VERSION_MAJOR 4 +#define EV_VERSION_MINOR 33 + +/* eventmask, revents, events... */ +enum { + EV_UNDEF = (int)0xFFFFFFFF, /* guaranteed to be invalid */ + EV_NONE = 0x00, /* no events */ + EV_READ = 0x01, /* ev_io detected read will not block */ + EV_WRITE = 0x02, /* ev_io detected write will not block */ + EV__IOFDSET = 0x80, /* internal use only */ + EV_IO = EV_READ, /* alias for type-detection */ + EV_TIMER = 0x00000100, /* timer timed out */ +#if EV_COMPAT3 + EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */ +#endif + EV_PERIODIC = 0x00000200, /* periodic timer timed out */ + EV_SIGNAL = 0x00000400, /* signal was received */ + EV_CHILD = 0x00000800, /* child/pid had status change */ + EV_STAT = 0x00001000, /* stat data changed */ + EV_IDLE = 0x00002000, /* event loop is idling */ + EV_PREPARE = 0x00004000, /* event loop about to poll */ + EV_CHECK = 0x00008000, /* event loop finished poll */ + EV_EMBED = 0x00010000, /* embedded event loop needs sweep */ + EV_FORK = 0x00020000, /* event loop resumed in child */ + EV_CLEANUP = 0x00040000, /* event loop resumed in child */ + EV_ASYNC = 0x00080000, /* async intra-loop signal */ + EV_CUSTOM = 0x01000000, /* for use by user code */ + EV_ERROR = (int)0x80000000 /* sent when an error occurs */ +}; + +/* can be used to add custom fields to all watchers, while losing binary compatibility */ +#ifndef EV_COMMON +# define EV_COMMON void *data; +#endif + +#ifndef EV_CB_DECLARE +# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); +#endif +#ifndef EV_CB_INVOKE +# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) +#endif + +/* not official, do not use */ +#define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents) + +/* + * struct member types: + * private: you may look at them, but not change them, + * and they might not mean anything to you. + * ro: can be read anytime, but only changed when the watcher isn't active. + * rw: can be read and modified anytime, even when the watcher is active. + * + * some internal details that might be helpful for debugging: + * + * active is either 0, which means the watcher is not active, + * or the array index of the watcher (periodics, timers) + * or the array index + 1 (most other watchers) + * or simply 1 for watchers that aren't in some array. + * pending is either 0, in which case the watcher isn't, + * or the array index + 1 in the pendings array. + */ + +#if EV_MINPRI == EV_MAXPRI +# define EV_DECL_PRIORITY +#elif !defined (EV_DECL_PRIORITY) +# define EV_DECL_PRIORITY int priority; +#endif + +/* shared by all watchers */ +#define EV_WATCHER(type) \ + int active; /* private */ \ + int pending; /* private */ \ + EV_DECL_PRIORITY /* private */ \ + EV_COMMON /* rw */ \ + EV_CB_DECLARE (type) /* private */ + +#define EV_WATCHER_LIST(type) \ + EV_WATCHER (type) \ + struct ev_watcher_list *next; /* private */ + +#define EV_WATCHER_TIME(type) \ + EV_WATCHER (type) \ + ev_tstamp at; /* private */ + +/* base class, nothing to see here unless you subclass */ +typedef struct ev_watcher +{ + EV_WATCHER (ev_watcher) +} ev_watcher; + +/* base class, nothing to see here unless you subclass */ +typedef struct ev_watcher_list +{ + EV_WATCHER_LIST (ev_watcher_list) +} ev_watcher_list; + +/* base class, nothing to see here unless you subclass */ +typedef struct ev_watcher_time +{ + EV_WATCHER_TIME (ev_watcher_time) +} ev_watcher_time; + +/* invoked when fd is either EV_READable or EV_WRITEable */ +/* revent EV_READ, EV_WRITE */ +typedef struct ev_io +{ + EV_WATCHER_LIST (ev_io) + + int fd; /* ro */ + int events; /* ro */ +} ev_io; + +/* invoked after a specific time, repeatable (based on monotonic clock) */ +/* revent EV_TIMEOUT */ +typedef struct ev_timer +{ + EV_WATCHER_TIME (ev_timer) + + ev_tstamp repeat; /* rw */ +} ev_timer; + +/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ +/* revent EV_PERIODIC */ +typedef struct ev_periodic +{ + EV_WATCHER_TIME (ev_periodic) + + ev_tstamp offset; /* rw */ + ev_tstamp interval; /* rw */ + ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) EV_NOEXCEPT; /* rw */ +} ev_periodic; + +/* invoked when the given signal has been received */ +/* revent EV_SIGNAL */ +typedef struct ev_signal +{ + EV_WATCHER_LIST (ev_signal) + + int signum; /* ro */ +} ev_signal; + +/* invoked when sigchld is received and waitpid indicates the given pid */ +/* revent EV_CHILD */ +/* does not support priorities */ +typedef struct ev_child +{ + EV_WATCHER_LIST (ev_child) + + int flags; /* private */ + int pid; /* ro */ + int rpid; /* rw, holds the received pid */ + int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ +} ev_child; + +#if EV_STAT_ENABLE +/* st_nlink = 0 means missing file or other error */ +# ifdef _WIN32 +typedef struct _stati64 ev_statdata; +# else +typedef struct stat ev_statdata; +# endif + +/* invoked each time the stat data changes for a given path */ +/* revent EV_STAT */ +typedef struct ev_stat +{ + EV_WATCHER_LIST (ev_stat) + + ev_timer timer; /* private */ + ev_tstamp interval; /* ro */ + const char *path; /* ro */ + ev_statdata prev; /* ro */ + ev_statdata attr; /* ro */ + + int wd; /* wd for inotify, fd for kqueue */ +} ev_stat; +#endif + +/* invoked when the nothing else needs to be done, keeps the process from blocking */ +/* revent EV_IDLE */ +typedef struct ev_idle +{ + EV_WATCHER (ev_idle) +} ev_idle; + +/* invoked for each run of the mainloop, just before the blocking call */ +/* you can still change events in any way you like */ +/* revent EV_PREPARE */ +typedef struct ev_prepare +{ + EV_WATCHER (ev_prepare) +} ev_prepare; + +/* invoked for each run of the mainloop, just after the blocking call */ +/* revent EV_CHECK */ +typedef struct ev_check +{ + EV_WATCHER (ev_check) +} ev_check; + +/* the callback gets invoked before check in the child process when a fork was detected */ +/* revent EV_FORK */ +typedef struct ev_fork +{ + EV_WATCHER (ev_fork) +} ev_fork; + +/* is invoked just before the loop gets destroyed */ +/* revent EV_CLEANUP */ +typedef struct ev_cleanup +{ + EV_WATCHER (ev_cleanup) +} ev_cleanup; + +#if EV_EMBED_ENABLE +/* used to embed an event loop inside another */ +/* the callback gets invoked when the event loop has handled events, and can be 0 */ +typedef struct ev_embed +{ + EV_WATCHER (ev_embed) + + struct ev_loop *other; /* ro */ +#undef EV_IO_ENABLE +#define EV_IO_ENABLE 1 + ev_io io; /* private */ +#undef EV_PREPARE_ENABLE +#define EV_PREPARE_ENABLE 1 + ev_prepare prepare; /* private */ + ev_check check; /* unused */ + ev_timer timer; /* unused */ + ev_periodic periodic; /* unused */ + ev_idle idle; /* unused */ + ev_fork fork; /* private */ + ev_cleanup cleanup; /* unused */ +} ev_embed; +#endif + +#if EV_ASYNC_ENABLE +/* invoked when somebody calls ev_async_send on the watcher */ +/* revent EV_ASYNC */ +typedef struct ev_async +{ + EV_WATCHER (ev_async) + + EV_ATOMIC_T sent; /* private */ +} ev_async; + +# define ev_async_pending(w) (+(w)->sent) +#endif + +/* the presence of this union forces similar struct layout */ +union ev_any_watcher +{ + struct ev_watcher w; + struct ev_watcher_list wl; + + struct ev_io io; + struct ev_timer timer; + struct ev_periodic periodic; + struct ev_signal signal; + struct ev_child child; +#if EV_STAT_ENABLE + struct ev_stat stat; +#endif +#if EV_IDLE_ENABLE + struct ev_idle idle; +#endif + struct ev_prepare prepare; + struct ev_check check; +#if EV_FORK_ENABLE + struct ev_fork fork; +#endif +#if EV_CLEANUP_ENABLE + struct ev_cleanup cleanup; +#endif +#if EV_EMBED_ENABLE + struct ev_embed embed; +#endif +#if EV_ASYNC_ENABLE + struct ev_async async; +#endif +}; + +/* flag bits for ev_default_loop and ev_loop_new */ +enum { + /* the default */ + EVFLAG_AUTO = 0x00000000U, /* not quite a mask */ + /* flag bits */ + EVFLAG_NOENV = 0x01000000U, /* do NOT consult environment */ + EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */ + /* debugging/feature disable */ + EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */ +#if EV_COMPAT3 + EVFLAG_NOSIGFD = 0, /* compatibility to pre-3.9 */ +#endif + EVFLAG_SIGNALFD = 0x00200000U, /* attempt to use signalfd */ + EVFLAG_NOSIGMASK = 0x00400000U, /* avoid modifying the signal mask */ + EVFLAG_NOTIMERFD = 0x00800000U /* avoid creating a timerfd */ +}; + +/* method bits to be ored together */ +enum { + EVBACKEND_SELECT = 0x00000001U, /* available just about anywhere */ + EVBACKEND_POLL = 0x00000002U, /* !win, !aix, broken on osx */ + EVBACKEND_EPOLL = 0x00000004U, /* linux */ + EVBACKEND_KQUEUE = 0x00000008U, /* bsd, broken on osx */ + EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */ + EVBACKEND_PORT = 0x00000020U, /* solaris 10 */ + EVBACKEND_LINUXAIO = 0x00000040U, /* linux AIO, 4.19+ */ + EVBACKEND_IOURING = 0x00000080U, /* linux io_uring, 5.1+ */ + EVBACKEND_ALL = 0x000000FFU, /* all known backends */ + EVBACKEND_MASK = 0x0000FFFFU /* all future backends */ +}; + +#if EV_PROTOTYPES +EV_API_DECL int ev_version_major (void) EV_NOEXCEPT; +EV_API_DECL int ev_version_minor (void) EV_NOEXCEPT; + +EV_API_DECL unsigned int ev_supported_backends (void) EV_NOEXCEPT; +EV_API_DECL unsigned int ev_recommended_backends (void) EV_NOEXCEPT; +EV_API_DECL unsigned int ev_embeddable_backends (void) EV_NOEXCEPT; + +EV_API_DECL ev_tstamp ev_time (void) EV_NOEXCEPT; +EV_API_DECL void ev_sleep (ev_tstamp delay) EV_NOEXCEPT; /* sleep for a while */ + +/* Sets the allocation function to use, works like realloc. + * It is used to allocate and free memory. + * If it returns zero when memory needs to be allocated, the library might abort + * or take some potentially destructive action. + * The default is your system realloc function. + */ +EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT; + +/* set the callback function to call on a + * retryable syscall error + * (such as failed select, poll, epoll_wait) + */ +EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT; + +#if EV_MULTIPLICITY + +/* the default loop is the only one that handles signals and child watchers */ +/* you can call this as often as you like */ +EV_API_DECL struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; + +/* create and destroy alternative loops that don't handle signals */ +EV_API_DECL struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; + +EV_API_DECL ev_tstamp ev_now (EV_P) EV_NOEXCEPT; /* time w.r.t. timers and the eventloop, updated after each poll */ + +#else + +EV_API_DECL int ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; /* returns true when successful */ + +EV_API_DECL ev_tstamp ev_rt_now; + +EV_INLINE ev_tstamp +ev_now (void) EV_NOEXCEPT +{ + return ev_rt_now; +} + +/* looks weird, but ev_is_default_loop (EV_A) still works if this exists */ +EV_INLINE int +ev_is_default_loop (void) EV_NOEXCEPT +{ + return 1; +} + +#endif /* multiplicity */ + +/* destroy event loops, also works for the default loop */ +EV_API_DECL void ev_loop_destroy (EV_P); + +/* this needs to be called after fork, to duplicate the loop */ +/* when you want to re-use it in the child */ +/* you can call it in either the parent or the child */ +/* you can actually call it at any time, anywhere :) */ +EV_API_DECL void ev_loop_fork (EV_P) EV_NOEXCEPT; + +EV_API_DECL unsigned int ev_backend (EV_P) EV_NOEXCEPT; /* backend in use by loop */ + +EV_API_DECL void ev_now_update (EV_P) EV_NOEXCEPT; /* update event loop time */ +/* + * Same as ev_now_update, but will update time merely if cheap (coarse) timers + * are used in system. + */ +EV_API_DECL void ev_now_update_if_cheap (EV_P) EV_NOEXCEPT; + +#if EV_WALK_ENABLE +/* walk (almost) all watchers in the loop of a given type, invoking the */ +/* callback on every such watcher. The callback might stop the watcher, */ +/* but do nothing else with the loop */ +EV_API_DECL void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT; +#endif + +#endif /* prototypes */ + +/* ev_run flags values */ +enum { + EVRUN_NOWAIT = 1, /* do not block/wait */ + EVRUN_ONCE = 2 /* block *once* only */ +}; + +/* ev_break how values */ +enum { + EVBREAK_CANCEL = 0, /* undo unloop */ + EVBREAK_ONE = 1, /* unloop once */ + EVBREAK_ALL = 2 /* unloop all loops */ +}; + +#if EV_PROTOTYPES +EV_API_DECL int ev_run (EV_P_ int flags EV_CPP (= 0)); +EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_NOEXCEPT; /* break out of the loop */ + +/* + * ref/unref can be used to add or remove a refcount on the mainloop. every watcher + * keeps one reference. if you have a long-running watcher you never unregister that + * should not keep ev_loop from running, unref() after starting, and ref() before stopping. + */ +EV_API_DECL void ev_ref (EV_P) EV_NOEXCEPT; +EV_API_DECL void ev_unref (EV_P) EV_NOEXCEPT; +EV_API_DECL int ev_active_cnt (EV_P) EV_NOEXCEPT; + +/* + * convenience function, wait for a single event, without registering an event watcher + * if timeout is < 0, do wait indefinitely + */ +EV_API_DECL void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT; + +EV_API_DECL void ev_invoke_pending (EV_P); /* invoke all pending watchers */ + +# if EV_FEATURE_API +EV_API_DECL unsigned int ev_iteration (EV_P) EV_NOEXCEPT; /* number of loop iterations */ +EV_API_DECL unsigned int ev_depth (EV_P) EV_NOEXCEPT; /* #ev_loop enters - #ev_loop leaves */ +EV_API_DECL void ev_verify (EV_P) EV_NOEXCEPT; /* abort if loop data corrupted */ + +EV_API_DECL void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT; /* sleep at least this time, default 0 */ +EV_API_DECL void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT; /* sleep at least this time, default 0 */ + +/* advanced stuff for threading etc. support, see docs */ +EV_API_DECL void ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT; +EV_API_DECL void *ev_userdata (EV_P) EV_NOEXCEPT; +typedef void (*ev_loop_callback)(EV_P); +EV_API_DECL void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT; +/* C++ doesn't allow the use of the ev_loop_callback typedef here, so we need to spell it out */ +EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT; + +EV_API_DECL unsigned int ev_pending_count (EV_P) EV_NOEXCEPT; /* number of pending events, if any */ + +/* + * stop/start the timer handling. + */ +EV_API_DECL void ev_suspend (EV_P) EV_NOEXCEPT; +EV_API_DECL void ev_resume (EV_P) EV_NOEXCEPT; +#endif + +#endif + +/* these may evaluate ev multiple times, and the other arguments at most once */ +/* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ +#define ev_init(ev,cb_) do { \ + ((ev_watcher *)(void *)(ev))->active = \ + ((ev_watcher *)(void *)(ev))->pending = 0; \ + ev_set_priority ((ev), 0); \ + ev_set_cb ((ev), cb_); \ +} while (0) + +#define ev_io_modify(ev,events_) do { (ev)->events = (ev)->events & EV__IOFDSET | (events_); } while (0) +#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0) +#define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0) +#define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0) +#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) +#define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) +#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) +#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ +#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ +#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ +#define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) +#define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ +#define ev_cleanup_set(ev) /* nop, yes, this is a serious in-joke */ +#define ev_async_set(ev) /* nop, yes, this is a serious in-joke */ + +#define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) +#define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) +#define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0) +#define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) +#define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) +#define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) +#define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) +#define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) +#define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) +#define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) +#define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) +#define ev_cleanup_init(ev,cb) do { ev_init ((ev), (cb)); ev_cleanup_set ((ev)); } while (0) +#define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) + +#define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ +#define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ +#define ev_can_stop(ev) (ev_is_pending(ev) || ev_is_active(ev)) /* ro, true when the watcher has been started */ + +#define ev_cb_(ev) (ev)->cb /* rw */ +#define ev_cb(ev) (memmove (&ev_cb_ (ev), &((ev_watcher *)(ev))->cb, sizeof (ev_cb_ (ev))), (ev)->cb) + +#if EV_MINPRI == EV_MAXPRI +# define ev_priority(ev) ((ev), EV_MINPRI) +# define ev_set_priority(ev,pri) ((ev), (pri)) +#else +# define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority)) +# define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri) +#endif + +#define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at) + +#ifndef ev_set_cb +/* memmove is used here to avoid strict aliasing violations, and hopefully is optimized out by any reasonable compiler */ +# define ev_set_cb(ev,cb_) (ev_cb_ (ev) = (cb_), memmove (&((ev_watcher *)(ev))->cb, &ev_cb_ (ev), sizeof (ev_cb_ (ev)))) +#endif + +/* stopping (enabling, adding) a watcher does nothing if it is already running */ +/* stopping (disabling, deleting) a watcher does nothing unless it's already running */ +#if EV_PROTOTYPES + +/* feeds an event into a watcher as if the event actually occurred */ +/* accepts any ev_watcher type */ +EV_API_DECL void ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT; +EV_API_DECL void ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT; +#if EV_SIGNAL_ENABLE +EV_API_DECL void ev_feed_signal (int signum) EV_NOEXCEPT; +EV_API_DECL void ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT; +#endif +EV_API_DECL void ev_invoke (EV_P_ void *w, int revents); +EV_API_DECL int ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT; + +EV_API_DECL void ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT; +EV_API_DECL void ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT; + +EV_API_DECL void ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT; +EV_API_DECL void ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT; +/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ +EV_API_DECL void ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT; +/* return remaining time */ +EV_API_DECL ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT; + +#if EV_PERIODIC_ENABLE +EV_API_DECL void ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT; +EV_API_DECL void ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT; +EV_API_DECL void ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT; +#endif + +/* only supported in the default loop */ +#if EV_SIGNAL_ENABLE +EV_API_DECL void ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT; +EV_API_DECL void ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT; +#endif + +/* only supported in the default loop */ +# if EV_CHILD_ENABLE +EV_API_DECL void ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT; +EV_API_DECL void ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT; +# endif + +# if EV_STAT_ENABLE +EV_API_DECL void ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT; +EV_API_DECL void ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT; +EV_API_DECL void ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT; +# endif + +# if EV_IDLE_ENABLE +EV_API_DECL void ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT; +EV_API_DECL void ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT; +# endif + +#if EV_PREPARE_ENABLE +EV_API_DECL void ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT; +EV_API_DECL void ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT; +#endif + +#if EV_CHECK_ENABLE +EV_API_DECL void ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT; +EV_API_DECL void ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT; +#endif + +# if EV_FORK_ENABLE +EV_API_DECL void ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT; +EV_API_DECL void ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT; +# endif + +# if EV_CLEANUP_ENABLE +EV_API_DECL void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT; +EV_API_DECL void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT; +# endif + +# if EV_EMBED_ENABLE +/* only supported when loop to be embedded is in fact embeddable */ +EV_API_DECL void ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT; +EV_API_DECL void ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT; +EV_API_DECL void ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT; +# endif + +# if EV_ASYNC_ENABLE +EV_API_DECL void ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT; +EV_API_DECL void ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT; +EV_API_DECL void ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT; +# endif + +#if EV_COMPAT3 + #define EVLOOP_NONBLOCK EVRUN_NOWAIT + #define EVLOOP_ONESHOT EVRUN_ONCE + #define EVUNLOOP_CANCEL EVBREAK_CANCEL + #define EVUNLOOP_ONE EVBREAK_ONE + #define EVUNLOOP_ALL EVBREAK_ALL + #if EV_PROTOTYPES + EV_INLINE void ev_loop (EV_P_ int flags) { ev_run (EV_A_ flags); } + EV_INLINE void ev_unloop (EV_P_ int how ) { ev_break (EV_A_ how ); } + EV_INLINE void ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); } + EV_INLINE void ev_default_fork (void) { ev_loop_fork (EV_DEFAULT); } + #if EV_FEATURE_API + EV_INLINE unsigned int ev_loop_count (EV_P) { return ev_iteration (EV_A); } + EV_INLINE unsigned int ev_loop_depth (EV_P) { return ev_depth (EV_A); } + EV_INLINE void ev_loop_verify (EV_P) { ev_verify (EV_A); } + #endif + #endif +#else + typedef struct ev_loop ev_loop; +#endif + +#endif + +EV_CPP(}) + +#endif + |