Adding upstream version 3.8.1.upstream/3.8.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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
+