X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/49a82c163f76e2916974ec3eac8d395662e7187b..c7a6958051fa283b6c7a30962ee616cccb306d01:/ev.c?ds=inline diff --git a/ev.c b/ev.c index aefc9df..ff47bd2 100644 --- a/ev.c +++ b/ev.c @@ -1,61 +1,284 @@ +/* + * libev event processing core, watcher management + * + * Copyright (c) 2007 Marc Alexander Lehmann + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, 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 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef EV_STANDALONE +# include "config.h" + +# if HAVE_CLOCK_GETTIME +# ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +# endif +# ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 1 +# endif +# endif + +# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) +# define EV_USE_SELECT 1 +# endif + +# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) +# define EV_USE_POLL 1 +# endif + +# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) +# define EV_USE_EPOLL 1 +# endif + +# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) +# define EV_USE_KQUEUE 1 +# endif + +#endif + #include #include -#include #include -#include +#include #include #include #include -#include +#include #include -#define HAVE_EPOLL 1 +#include + +#ifndef _WIN32 +# include +# include +# include +#else +# define WIN32_LEAN_AND_MEAN +# include +# ifndef EV_SELECT_IS_WINSOCKET +# define EV_SELECT_IS_WINSOCKET 1 +# endif +#endif + +/**/ + +#ifndef EV_USE_MONOTONIC +# define EV_USE_MONOTONIC 1 +#endif + +#ifndef EV_USE_SELECT +# define EV_USE_SELECT 1 +# define EV_SELECT_USE_FD_SET 1 +#endif -#ifndef HAVE_MONOTONIC -# ifdef CLOCK_MONOTONIC -# define HAVE_MONOTONIC 1 +#ifndef EV_USE_POLL +# ifdef _WIN32 +# define EV_USE_POLL 0 +# else +# define EV_USE_POLL 1 # endif #endif -#ifndef HAVE_SELECT -# define HAVE_SELECT 1 +#ifndef EV_USE_EPOLL +# define EV_USE_EPOLL 0 #endif -#ifndef HAVE_EPOLL -# define HAVE_EPOLL 0 +#ifndef EV_USE_KQUEUE +# define EV_USE_KQUEUE 0 #endif -#ifndef HAVE_REALTIME -# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ +#ifndef EV_USE_REALTIME +# define EV_USE_REALTIME 1 +#endif + +/**/ + +/* darwin simply cannot be helped */ +#ifdef __APPLE__ +# undef EV_USE_POLL +# undef EV_USE_KQUEUE #endif +#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_SELECT_IS_WINSOCKET +# include +#endif + +/**/ + #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ -#define MAX_BLOCKTIME 60. +#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ +#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ +/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ + +#ifdef EV_H +# include EV_H +#else +# include "ev.h" +#endif + +#if __GNUC__ >= 3 +# define expect(expr,value) __builtin_expect ((expr),(value)) +# define inline inline +#else +# define expect(expr,value) (expr) +# define inline static +#endif + +#define expect_false(expr) expect ((expr) != 0, 0) +#define expect_true(expr) expect ((expr) != 0, 1) -#include "ev.h" +#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) +#define ABSPRI(w) ((w)->priority - EV_MINPRI) + +#define EMPTY /* required for microsofts broken pseudo-c compiler */ typedef struct ev_watcher *W; typedef struct ev_watcher_list *WL; typedef struct ev_watcher_time *WT; -static ev_tstamp now, diff; /* monotonic clock */ -ev_tstamp ev_now; -int ev_method; +static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ + +#ifdef _WIN32 +# include "ev_win32.c" +#endif + +/*****************************************************************************/ + +static void (*syserr_cb)(const char *msg); + +void ev_set_syserr_cb (void (*cb)(const char *msg)) +{ + syserr_cb = cb; +} + +static void +syserr (const char *msg) +{ + if (!msg) + msg = "(libev) system error"; + + if (syserr_cb) + syserr_cb (msg); + else + { + perror (msg); + abort (); + } +} + +static void *(*alloc)(void *ptr, long size); + +void ev_set_allocator (void *(*cb)(void *ptr, long size)) +{ + alloc = cb; +} + +static void * +ev_realloc (void *ptr, long size) +{ + ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); + + if (!ptr && size) + { + fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); + abort (); + } + + return ptr; +} + +#define ev_malloc(size) ev_realloc (0, (size)) +#define ev_free(ptr) ev_realloc ((ptr), 0) + +/*****************************************************************************/ + +typedef struct +{ + WL head; + unsigned char events; + unsigned char reify; +#if EV_SELECT_IS_WINSOCKET + SOCKET handle; +#endif +} ANFD; + +typedef struct +{ + W w; + int events; +} ANPENDING; -static int have_monotonic; /* runtime */ +#if EV_MULTIPLICITY -static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ -static void (*method_modify)(int fd, int oev, int nev); -static void (*method_poll)(ev_tstamp timeout); + 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" + + struct ev_loop default_loop_struct; + static struct ev_loop *default_loop; + +#else + + ev_tstamp ev_rt_now; + #define VAR(name,decl) static decl; + #include "ev_vars.h" + #undef VAR + + static int default_loop; + +#endif /*****************************************************************************/ ev_tstamp ev_time (void) { -#if HAVE_REALTIME +#if EV_USE_REALTIME struct timespec ts; clock_gettime (CLOCK_REALTIME, &ts); return ts.tv_sec + ts.tv_nsec * 1e-9; @@ -66,11 +289,11 @@ ev_time (void) #endif } -static ev_tstamp +inline ev_tstamp get_clock (void) { -#if HAVE_MONOTONIC - if (have_monotonic) +#if EV_USE_MONOTONIC + if (expect_true (have_monotonic)) { struct timespec ts; clock_gettime (CLOCK_MONOTONIC, &ts); @@ -81,144 +304,279 @@ get_clock (void) return ev_time (); } -#define array_needsize(base,cur,cnt,init) \ - if ((cnt) > cur) \ - { \ - int newcnt = cur ? cur << 1 : 16; \ - base = realloc (base, sizeof (*base) * (newcnt)); \ - init (base + cur, newcnt - cur); \ - cur = newcnt; \ - } +#if EV_MULTIPLICITY +ev_tstamp +ev_now (EV_P) +{ + return ev_rt_now; +} +#endif -/*****************************************************************************/ +#define array_roundsize(type,n) (((n) | 4) & ~3) + +#define array_needsize(type,base,cur,cnt,init) \ + if (expect_false ((cnt) > cur)) \ + { \ + int newcnt = cur; \ + do \ + { \ + newcnt = array_roundsize (type, newcnt << 1); \ + } \ + while ((cnt) > newcnt); \ + \ + base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ + init (base + cur, newcnt - cur); \ + cur = newcnt; \ + } -typedef struct -{ - struct ev_io *head; - unsigned char wev, rev; /* want, received event set */ -} ANFD; +#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*/\ + } -static ANFD *anfds; -static int anfdmax; +#define array_free(stem, idx) \ + ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; -static int *fdchanges; -static int fdchangemax, fdchangecnt; +/*****************************************************************************/ static void anfds_init (ANFD *base, int count) { while (count--) { - base->head = 0; - base->wev = base->rev = EV_NONE; + base->head = 0; + base->events = EV_NONE; + base->reify = 0; + ++base; } } -typedef struct +void +ev_feed_event (EV_P_ void *w, int revents) { - W w; - int events; -} ANPENDING; + W w_ = (W)w; + + if (w_->pending) + { + pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; + return; + } -static ANPENDING *pendings; -static int pendingmax, pendingcnt; + w_->pending = ++pendingcnt [ABSPRI (w_)]; + array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void)); + pendings [ABSPRI (w_)][w_->pending - 1].w = w_; + pendings [ABSPRI (w_)][w_->pending - 1].events = revents; +} static void -event (W w, int events) +queue_events (EV_P_ W *events, int eventcnt, int type) { - w->pending = ++pendingcnt; - array_needsize (pendings, pendingmax, pendingcnt, ); - pendings [pendingcnt - 1].w = w; - pendings [pendingcnt - 1].events = events; + int i; + + for (i = 0; i < eventcnt; ++i) + ev_feed_event (EV_A_ events [i], type); } -static void -fd_event (int fd, int events) +inline void +fd_event (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; struct ev_io *w; - for (w = anfd->head; w; w = w->next) + for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) { - int ev = w->events & events; + int ev = w->events & revents; if (ev) - event ((W)w, ev); + ev_feed_event (EV_A_ (W)w, ev); } } +void +ev_feed_fd_event (EV_P_ int fd, int revents) +{ + fd_event (EV_A_ fd, revents); +} + +/*****************************************************************************/ + static void -queue_events (W *events, int eventcnt, int type) +fd_reify (EV_P) { int i; - for (i = 0; i < eventcnt; ++i) - event (events [i], type); + for (i = 0; i < fdchangecnt; ++i) + { + int fd = fdchanges [i]; + ANFD *anfd = anfds + fd; + struct ev_io *w; + + int events = 0; + + for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) + events |= w->events; + +#if EV_SELECT_IS_WINSOCKET + if (events) + { + unsigned long argp; + anfd->handle = _get_osfhandle (fd); + assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); + } +#endif + + anfd->reify = 0; + + method_modify (EV_A_ fd, anfd->events, events); + anfd->events = events; + } + + fdchangecnt = 0; } -/*****************************************************************************/ +static void +fd_change (EV_P_ int fd) +{ + if (anfds [fd].reify) + return; -static struct ev_timer **timers; -static int timermax, timercnt; + anfds [fd].reify = 1; -static struct ev_periodic **periodics; -static int periodicmax, periodiccnt; + ++fdchangecnt; + array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); + fdchanges [fdchangecnt - 1] = fd; +} static void -upheap (WT *timers, int k) +fd_kill (EV_P_ int fd) { - WT w = timers [k]; + struct ev_io *w; - while (k && timers [k >> 1]->at > w->at) + while ((w = (struct ev_io *)anfds [fd].head)) { - timers [k] = timers [k >> 1]; - timers [k]->active = k + 1; + ev_io_stop (EV_A_ w); + ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); + } +} + +static int +fd_valid (int fd) +{ +#ifdef _WIN32 + return _get_osfhandle (fd) != -1; +#else + return fcntl (fd, F_GETFD) != -1; +#endif +} + +/* called on EBADF to verify fds */ +static void +fd_ebadf (EV_P) +{ + int fd; + + for (fd = 0; fd < anfdmax; ++fd) + if (anfds [fd].events) + if (!fd_valid (fd) == -1 && errno == EBADF) + fd_kill (EV_A_ fd); +} + +/* called on ENOMEM in select/poll to kill some fds and retry */ +static void +fd_enomem (EV_P) +{ + int fd; + + for (fd = anfdmax; fd--; ) + if (anfds [fd].events) + { + fd_kill (EV_A_ fd); + return; + } +} + +/* usually called after fork if method needs to re-arm all fds from scratch */ +static void +fd_rearm_all (EV_P) +{ + int fd; + + /* this should be highly optimised to not do anything but set a flag */ + for (fd = 0; fd < anfdmax; ++fd) + if (anfds [fd].events) + { + anfds [fd].events = 0; + fd_change (EV_A_ fd); + } +} + +/*****************************************************************************/ + +static void +upheap (WT *heap, int k) +{ + WT w = heap [k]; + + while (k && heap [k >> 1]->at > w->at) + { + heap [k] = heap [k >> 1]; + ((W)heap [k])->active = k + 1; k >>= 1; } - timers [k] = w; - timers [k]->active = k + 1; + heap [k] = w; + ((W)heap [k])->active = k + 1; } static void -downheap (WT *timers, int N, int k) +downheap (WT *heap, int N, int k) { - WT w = timers [k]; + WT w = heap [k]; while (k < (N >> 1)) { int j = k << 1; - if (j + 1 < N && timers [j]->at > timers [j + 1]->at) + if (j + 1 < N && heap [j]->at > heap [j + 1]->at) ++j; - if (w->at <= timers [j]->at) + if (w->at <= heap [j]->at) break; - timers [k] = timers [j]; - timers [k]->active = k + 1; + heap [k] = heap [j]; + ((W)heap [k])->active = k + 1; k = j; } - timers [k] = w; - timers [k]->active = k + 1; + heap [k] = w; + ((W)heap [k])->active = k + 1; +} + +inline void +adjustheap (WT *heap, int N, int k) +{ + upheap (heap, k); + downheap (heap, N, k); } /*****************************************************************************/ typedef struct { - struct ev_signal *head; - sig_atomic_t gotsig; + WL head; + sig_atomic_t volatile gotsig; } ANSIG; static ANSIG *signals; static int signalmax; static int sigpipe [2]; -static sig_atomic_t gotsig; +static sig_atomic_t volatile gotsig; static struct ev_io sigev; static void @@ -228,6 +586,7 @@ signals_init (ANSIG *base, int count) { base->head = 0; base->gotsig = 0; + ++base; } } @@ -235,216 +594,464 @@ signals_init (ANSIG *base, int count) static void sighandler (int signum) { +#if _WIN32 + signal (signum, sighandler); +#endif + signals [signum - 1].gotsig = 1; - if (!gotsig) - { - gotsig = 1; - write (sigpipe [1], &gotsig, 1); - } + if (!gotsig) + { + int old_errno = errno; + gotsig = 1; + write (sigpipe [1], &signum, 1); + errno = old_errno; + } +} + +void +ev_feed_signal_event (EV_P_ int signum) +{ + WL w; + +#if EV_MULTIPLICITY + assert (("feeding signal events is only supported in the default loop", loop == default_loop)); +#endif + + --signum; + + if (signum < 0 || signum >= signalmax) + return; + + signals [signum].gotsig = 0; + + for (w = signals [signum].head; w; w = w->next) + ev_feed_event (EV_A_ (W)w, EV_SIGNAL); +} + +static void +sigcb (EV_P_ struct ev_io *iow, int revents) +{ + int signum; + + read (sigpipe [0], &revents, 1); + gotsig = 0; + + for (signum = signalmax; signum--; ) + if (signals [signum].gotsig) + ev_feed_signal_event (EV_A_ signum + 1); +} + +inline void +fd_intern (int fd) +{ +#ifdef _WIN32 + int arg = 1; + ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); +#else + fcntl (fd, F_SETFD, FD_CLOEXEC); + fcntl (fd, F_SETFL, O_NONBLOCK); +#endif +} + +static void +siginit (EV_P) +{ + fd_intern (sigpipe [0]); + fd_intern (sigpipe [1]); + + ev_io_set (&sigev, sigpipe [0], EV_READ); + ev_io_start (EV_A_ &sigev); + ev_unref (EV_A); /* child watcher should not keep loop alive */ +} + +/*****************************************************************************/ + +static struct ev_child *childs [PID_HASHSIZE]; + +#ifndef _WIN32 + +static struct ev_signal childev; + +#ifndef WCONTINUED +# define WCONTINUED 0 +#endif + +static void +child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) +{ + struct ev_child *w; + + for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) + if (w->pid == pid || !w->pid) + { + ev_priority (w) = ev_priority (sw); /* need to do it *now* */ + w->rpid = pid; + w->rstatus = status; + ev_feed_event (EV_A_ (W)w, EV_CHILD); + } +} + +static void +childcb (EV_P_ struct ev_signal *sw, int revents) +{ + int pid, status; + + if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) + { + /* make sure we are called again until all childs have been reaped */ + ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); + + child_reap (EV_A_ sw, pid, pid, status); + child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ + } +} + +#endif + +/*****************************************************************************/ + +#if EV_USE_KQUEUE +# include "ev_kqueue.c" +#endif +#if EV_USE_EPOLL +# include "ev_epoll.c" +#endif +#if EV_USE_POLL +# include "ev_poll.c" +#endif +#if EV_USE_SELECT +# include "ev_select.c" +#endif + +int +ev_version_major (void) +{ + return EV_VERSION_MAJOR; +} + +int +ev_version_minor (void) +{ + return EV_VERSION_MINOR; +} + +/* return true if we are running with elevated privileges and should ignore env variables */ +static int +enable_secure (void) +{ +#ifdef _WIN32 + return 0; +#else + return getuid () != geteuid () + || getgid () != getegid (); +#endif +} + +int +ev_method (EV_P) +{ + return method; +} + +static void +loop_init (EV_P_ unsigned int flags) +{ + if (!method) + { +#if EV_USE_MONOTONIC + { + struct timespec ts; + if (!clock_gettime (CLOCK_MONOTONIC, &ts)) + have_monotonic = 1; + } +#endif + + ev_rt_now = ev_time (); + mn_now = get_clock (); + now_floor = mn_now; + rtmn_diff = ev_rt_now - mn_now; + + if (!(flags & EVMETHOD_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) + flags = atoi (getenv ("LIBEV_FLAGS")); + + if (!(flags & 0x0000ffff)) + flags |= 0x0000ffff; + + method = 0; +#if EV_USE_KQUEUE + if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); +#endif +#if EV_USE_EPOLL + if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); +#endif +#if EV_USE_POLL + if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); +#endif +#if EV_USE_SELECT + if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); +#endif + + ev_init (&sigev, sigcb); + ev_set_priority (&sigev, EV_MAXPRI); + } +} + +void +loop_destroy (EV_P) +{ + int i; + +#if EV_USE_KQUEUE + if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); +#endif +#if EV_USE_EPOLL + if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); +#endif +#if EV_USE_POLL + if (method == EVMETHOD_POLL ) poll_destroy (EV_A); +#endif +#if EV_USE_SELECT + if (method == EVMETHOD_SELECT) select_destroy (EV_A); +#endif + + for (i = NUMPRI; i--; ) + array_free (pending, [i]); + + /* have to use the microsoft-never-gets-it-right macro */ + array_free (fdchange, EMPTY); + array_free (timer, EMPTY); +#if EV_PERIODICS + array_free (periodic, EMPTY); +#endif + array_free (idle, EMPTY); + array_free (prepare, EMPTY); + array_free (check, EMPTY); + + method = 0; } static void -sigcb (struct ev_io *iow, int revents) +loop_fork (EV_P) { - struct ev_signal *w; - int sig; +#if EV_USE_EPOLL + if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); +#endif +#if EV_USE_KQUEUE + if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); +#endif - gotsig = 0; - read (sigpipe [0], &revents, 1); + if (ev_is_active (&sigev)) + { + /* default loop */ - for (sig = signalmax; sig--; ) - if (signals [sig].gotsig) - { - signals [sig].gotsig = 0; + ev_ref (EV_A); + ev_io_stop (EV_A_ &sigev); + close (sigpipe [0]); + close (sigpipe [1]); - for (w = signals [sig].head; w; w = w->next) - event ((W)w, EV_SIGNAL); - } + while (pipe (sigpipe)) + syserr ("(libev) error creating pipe"); + + siginit (EV_A); + } + + postfork = 0; } -static void -siginit (void) +#if EV_MULTIPLICITY +struct ev_loop * +ev_loop_new (unsigned int flags) { - fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); - fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); + struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); - /* rather than sort out wether we really need nb, set it */ - fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); - fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); + memset (loop, 0, sizeof (struct ev_loop)); - evio_set (&sigev, sigpipe [0], EV_READ); - evio_start (&sigev); -} + loop_init (EV_A_ flags); -/*****************************************************************************/ + if (ev_method (EV_A)) + return loop; -static struct ev_idle **idles; -static int idlemax, idlecnt; + return 0; +} -static struct ev_check **checks; -static int checkmax, checkcnt; +void +ev_loop_destroy (EV_P) +{ + loop_destroy (EV_A); + ev_free (loop); +} -/*****************************************************************************/ +void +ev_loop_fork (EV_P) +{ + postfork = 1; +} -#if HAVE_EPOLL -# include "ev_epoll.c" -#endif -#if HAVE_SELECT -# include "ev_select.c" #endif -int ev_init (int flags) +#if EV_MULTIPLICITY +struct ev_loop * +#else +int +#endif +ev_default_loop (unsigned int flags) { -#if HAVE_MONOTONIC - { - struct timespec ts; - if (!clock_gettime (CLOCK_MONOTONIC, &ts)) - have_monotonic = 1; - } + if (sigpipe [0] == sigpipe [1]) + if (pipe (sigpipe)) + return 0; + + if (!default_loop) + { +#if EV_MULTIPLICITY + struct ev_loop *loop = default_loop = &default_loop_struct; +#else + default_loop = 1; #endif - ev_now = ev_time (); - now = get_clock (); - diff = ev_now - now; + loop_init (EV_A_ flags); - if (pipe (sigpipe)) - return 0; + if (ev_method (EV_A)) + { + siginit (EV_A); - ev_method = EVMETHOD_NONE; -#if HAVE_EPOLL - if (ev_method == EVMETHOD_NONE) epoll_init (flags); +#ifndef _WIN32 + 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 -#if HAVE_SELECT - if (ev_method == EVMETHOD_NONE) select_init (flags); -#endif - - if (ev_method) - { - evw_init (&sigev, sigcb); - siginit (); + } + else + default_loop = 0; } - return ev_method; + return default_loop; } -/*****************************************************************************/ - -void ev_prefork (void) +void +ev_default_destroy (void) { - /* nop */ -} +#if EV_MULTIPLICITY + struct ev_loop *loop = default_loop; +#endif -void ev_postfork_parent (void) -{ - /* nop */ +#ifndef _WIN32 + ev_ref (EV_A); /* child watcher */ + ev_signal_stop (EV_A_ &childev); +#endif + + ev_ref (EV_A); /* signal watcher */ + ev_io_stop (EV_A_ &sigev); + + close (sigpipe [0]); sigpipe [0] = 0; + close (sigpipe [1]); sigpipe [1] = 0; + + loop_destroy (EV_A); } -void ev_postfork_child (void) +void +ev_default_fork (void) { -#if HAVE_EPOLL - if (ev_method == EVMETHOD_EPOLL) - epoll_postfork_child (); +#if EV_MULTIPLICITY + struct ev_loop *loop = default_loop; #endif - evio_stop (&sigev); - close (sigpipe [0]); - close (sigpipe [1]); - pipe (sigpipe); - siginit (); + if (method) + postfork = 1; } /*****************************************************************************/ -static void -fd_reify (void) +static int +any_pending (EV_P) { - int i; - - for (i = 0; i < fdchangecnt; ++i) - { - int fd = fdchanges [i]; - ANFD *anfd = anfds + fd; - struct ev_io *w; + int pri; - int wev = 0; - - for (w = anfd->head; w; w = w->next) - wev |= w->events; - - if (anfd->wev != wev) - { - method_modify (fd, anfd->wev, wev); - anfd->wev = wev; - } - } + for (pri = NUMPRI; pri--; ) + if (pendingcnt [pri]) + return 1; - fdchangecnt = 0; + return 0; } static void -call_pending () +call_pending (EV_P) { - int i; + int pri; - for (i = 0; i < pendingcnt; ++i) - { - ANPENDING *p = pendings + i; - - if (p->w) - { - p->w->pending = 0; - p->w->cb (p->w, p->events); - } - } + for (pri = NUMPRI; pri--; ) + while (pendingcnt [pri]) + { + ANPENDING *p = pendings [pri] + --pendingcnt [pri]; - pendingcnt = 0; + if (p->w) + { + p->w->pending = 0; + EV_CB_INVOKE (p->w, p->events); + } + } } static void -timers_reify () +timers_reify (EV_P) { - while (timercnt && timers [0]->at <= now) + while (timercnt && ((WT)timers [0])->at <= mn_now) { struct ev_timer *w = timers [0]; + assert (("inactive timer on timer heap detected", ev_is_active (w))); + /* first reschedule or stop timer */ if (w->repeat) { - w->at = now + w->repeat; - assert (("timer timeout in the past, negative repeat?", w->at > now)); + assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); + + ((WT)w)->at += w->repeat; + if (((WT)w)->at < mn_now) + ((WT)w)->at = mn_now; + downheap ((WT *)timers, timercnt, 0); } else - evtimer_stop (w); /* nonrepeating: stop timer */ + ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ - event ((W)w, EV_TIMEOUT); + ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); } } +#if EV_PERIODICS static void -periodics_reify () +periodics_reify (EV_P) { - while (periodiccnt && periodics [0]->at <= ev_now) + while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) { struct ev_periodic *w = periodics [0]; + assert (("inactive timer on periodic heap detected", ev_is_active (w))); + /* first reschedule or stop timer */ - if (w->interval) + if (w->reschedule_cb) + { + ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); + assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); + downheap ((WT *)periodics, periodiccnt, 0); + } + else if (w->interval) { - w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; - assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); + ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; + assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); downheap ((WT *)periodics, periodiccnt, 0); } else - evperiodic_stop (w); /* nonrepeating: stop timer */ + ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ - event ((W)w, EV_TIMEOUT); + ev_feed_event (EV_A_ (W)w, EV_PERIODIC); } } static void -periodics_reschedule (ev_tstamp diff) +periodics_reschedule (EV_P) { int i; @@ -453,83 +1060,136 @@ periodics_reschedule (ev_tstamp diff) { struct ev_periodic *w = periodics [i]; - if (w->interval) - { - ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; + if (w->reschedule_cb) + ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); + else if (w->interval) + ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; + } - if (fabs (diff) >= 1e-4) - { - evperiodic_stop (w); - evperiodic_start (w); + /* now rebuild the heap */ + for (i = periodiccnt >> 1; i--; ) + downheap ((WT *)periodics, periodiccnt, i); +} +#endif - i = 0; /* restart loop, inefficient, but time jumps should be rare */ - } - } +inline int +time_update_monotonic (EV_P) +{ + mn_now = get_clock (); + + if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) + { + ev_rt_now = rtmn_diff + mn_now; + return 0; + } + else + { + now_floor = mn_now; + ev_rt_now = ev_time (); + return 1; } } static void -time_update () +time_update (EV_P) { int i; - ev_now = ev_time (); - - if (have_monotonic) +#if EV_USE_MONOTONIC + if (expect_true (have_monotonic)) { - ev_tstamp odiff = diff; - - for (i = 4; --i; ) /* loop a few times, before making important decisions */ + if (time_update_monotonic (EV_A)) { - now = get_clock (); - diff = ev_now - now; + ev_tstamp odiff = rtmn_diff; + + for (i = 4; --i; ) /* loop a few times, before making important decisions */ + { + rtmn_diff = ev_rt_now - mn_now; - if (fabs (odiff - diff) < MIN_TIMEJUMP) - return; /* all is well */ + if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) + return; /* all is well */ - ev_now = ev_time (); - } + ev_rt_now = ev_time (); + mn_now = get_clock (); + now_floor = mn_now; + } - periodics_reschedule (diff - odiff); - /* no timer adjustment, as the monotonic clock doesn't jump */ +# if EV_PERIODICS + periodics_reschedule (EV_A); +# endif + /* no timer adjustment, as the monotonic clock doesn't jump */ + /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ + } } else +#endif { - if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) + ev_rt_now = ev_time (); + + if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) { - periodics_reschedule (ev_now - now); +#if EV_PERIODICS + periodics_reschedule (EV_A); +#endif /* adjust timers. this is easy, as the offset is the same for all */ for (i = 0; i < timercnt; ++i) - timers [i]->at += diff; + ((WT)timers [i])->at += ev_rt_now - mn_now; } - now = ev_now; + mn_now = ev_rt_now; } } -int ev_loop_done; +void +ev_ref (EV_P) +{ + ++activecnt; +} -void ev_loop (int flags) +void +ev_unref (EV_P) { - double block; - ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; + --activecnt; +} - if (checkcnt) - { - queue_events ((W *)checks, checkcnt, EV_CHECK); - call_pending (); - } +static int loop_done; + +void +ev_loop (EV_P_ int flags) +{ + double block; + loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; do { + /* queue check watchers (and execute them) */ + if (expect_false (preparecnt)) + { + queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); + call_pending (EV_A); + } + + /* we might have forked, so reify kernel state if necessary */ + if (expect_false (postfork)) + loop_fork (EV_A); + /* update fd-related kernel structures */ - fd_reify (); + fd_reify (EV_A); /* calculate blocking time */ - /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ - ev_now = ev_time (); + /* we only need this for !monotonic clock or timers, but as we basically + always have timers, we just calculate it always */ +#if EV_USE_MONOTONIC + if (expect_true (have_monotonic)) + time_update_monotonic (EV_A); + else +#endif + { + ev_rt_now = ev_time (); + mn_now = ev_rt_now; + } if (flags & EVLOOP_NONBLOCK || idlecnt) block = 0.; @@ -539,53 +1199,64 @@ void ev_loop (int flags) if (timercnt) { - ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; + ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; if (block > to) block = to; } +#if EV_PERIODICS if (periodiccnt) { - ev_tstamp to = periodics [0]->at - ev_now + method_fudge; + ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; if (block > to) block = to; } +#endif if (block < 0.) block = 0.; } - method_poll (block); + method_poll (EV_A_ block); - /* update ev_now, do magic */ - time_update (); + /* update ev_rt_now, do magic */ + time_update (EV_A); /* queue pending timers and reschedule them */ - periodics_reify (); /* absolute timers first */ - timers_reify (); /* relative timers second */ + timers_reify (EV_A); /* relative timers called last */ +#if EV_PERIODICS + periodics_reify (EV_A); /* absolute timers called first */ +#endif /* queue idle watchers unless io or timers are pending */ - if (!pendingcnt) - queue_events ((W *)idles, idlecnt, EV_IDLE); + if (idlecnt && !any_pending (EV_A)) + queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); - /* queue check and possibly idle watchers */ - queue_events ((W *)checks, checkcnt, EV_CHECK); + /* queue check watchers, to be executed first */ + if (checkcnt) + queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); - call_pending (); + call_pending (EV_A); } - while (!ev_loop_done); + while (activecnt && !loop_done); - if (ev_loop_done != 2) - ev_loop_done = 0; + if (loop_done != 2) + loop_done = 0; +} + +void +ev_unloop (EV_P_ int how) +{ + loop_done = how; } /*****************************************************************************/ -static void +inline void wlist_add (WL *head, WL elem) { elem->next = *head; *head = elem; } -static void +inline void wlist_del (WL *head, WL elem) { while (*head) @@ -600,284 +1271,374 @@ wlist_del (WL *head, WL elem) } } -static void -ev_start (W w, int active) +inline void +ev_clear_pending (EV_P_ W w) { - w->pending = 0; - w->active = active; + if (w->pending) + { + pendings [ABSPRI (w)][w->pending - 1].w = 0; + w->pending = 0; + } } -static void -ev_stop (W w) +inline void +ev_start (EV_P_ W w, int active) { - if (w->pending) - pendings [w->pending - 1].w = 0; + if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; + if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; + + w->active = active; + ev_ref (EV_A); +} +inline void +ev_stop (EV_P_ W w) +{ + ev_unref (EV_A); w->active = 0; } /*****************************************************************************/ void -evio_start (struct ev_io *w) +ev_io_start (EV_P_ struct ev_io *w) { + int fd = w->fd; + if (ev_is_active (w)) return; - int fd = w->fd; + assert (("ev_io_start called with negative fd", fd >= 0)); - ev_start ((W)w, 1); - array_needsize (anfds, anfdmax, fd + 1, anfds_init); + ev_start (EV_A_ (W)w, 1); + array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); wlist_add ((WL *)&anfds[fd].head, (WL)w); - ++fdchangecnt; - array_needsize (fdchanges, fdchangemax, fdchangecnt, ); - fdchanges [fdchangecnt - 1] = fd; + fd_change (EV_A_ fd); } void -evio_stop (struct ev_io *w) +ev_io_stop (EV_P_ struct ev_io *w) { + ev_clear_pending (EV_A_ (W)w); if (!ev_is_active (w)) return; + assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); + wlist_del ((WL *)&anfds[w->fd].head, (WL)w); - ev_stop ((W)w); + ev_stop (EV_A_ (W)w); - ++fdchangecnt; - array_needsize (fdchanges, fdchangemax, fdchangecnt, ); - fdchanges [fdchangecnt - 1] = w->fd; + fd_change (EV_A_ w->fd); } - void -evtimer_start (struct ev_timer *w) +ev_timer_start (EV_P_ struct ev_timer *w) { if (ev_is_active (w)) return; - w->at += now; + ((WT)w)->at += mn_now; - assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); + assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); - ev_start ((W)w, ++timercnt); - array_needsize (timers, timermax, timercnt, ); + ev_start (EV_A_ (W)w, ++timercnt); + array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); timers [timercnt - 1] = w; upheap ((WT *)timers, timercnt - 1); + + assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); } void -evtimer_stop (struct ev_timer *w) +ev_timer_stop (EV_P_ struct ev_timer *w) { + ev_clear_pending (EV_A_ (W)w); if (!ev_is_active (w)) return; - if (w->active < timercnt--) + assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); + + if (((W)w)->active < timercnt--) { - timers [w->active - 1] = timers [timercnt]; - downheap ((WT *)timers, timercnt, w->active - 1); + timers [((W)w)->active - 1] = timers [timercnt]; + adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); } - w->at = w->repeat; + ((WT)w)->at -= mn_now; - ev_stop ((W)w); + ev_stop (EV_A_ (W)w); } void -evtimer_again (struct ev_timer *w) +ev_timer_again (EV_P_ struct ev_timer *w) { if (ev_is_active (w)) { if (w->repeat) { - w->at = now + w->repeat; - downheap ((WT *)timers, timercnt, w->active - 1); + ((WT)w)->at = mn_now + w->repeat; + adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); } else - evtimer_stop (w); + ev_timer_stop (EV_A_ w); } else if (w->repeat) - evtimer_start (w); + ev_timer_start (EV_A_ w); } +#if EV_PERIODICS void -evperiodic_start (struct ev_periodic *w) +ev_periodic_start (EV_P_ struct ev_periodic *w) { if (ev_is_active (w)) return; - assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); - - /* this formula differs from the one in periodic_reify because we do not always round up */ - if (w->interval) - w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; + if (w->reschedule_cb) + ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); + else if (w->interval) + { + assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); + /* this formula differs from the one in periodic_reify because we do not always round up */ + ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; + } - ev_start ((W)w, ++periodiccnt); - array_needsize (periodics, periodicmax, periodiccnt, ); + ev_start (EV_A_ (W)w, ++periodiccnt); + array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); periodics [periodiccnt - 1] = w; upheap ((WT *)periodics, periodiccnt - 1); + + assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); } void -evperiodic_stop (struct ev_periodic *w) +ev_periodic_stop (EV_P_ struct ev_periodic *w) { + ev_clear_pending (EV_A_ (W)w); if (!ev_is_active (w)) return; - if (w->active < periodiccnt--) + assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); + + if (((W)w)->active < periodiccnt--) { - periodics [w->active - 1] = periodics [periodiccnt]; - downheap ((WT *)periodics, periodiccnt, w->active - 1); + periodics [((W)w)->active - 1] = periodics [periodiccnt]; + adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); } - ev_stop ((W)w); + ev_stop (EV_A_ (W)w); } void -evsignal_start (struct ev_signal *w) +ev_periodic_again (EV_P_ struct ev_periodic *w) +{ + /* TODO: use adjustheap and recalculation */ + ev_periodic_stop (EV_A_ w); + ev_periodic_start (EV_A_ w); +} +#endif + +void +ev_idle_start (EV_P_ struct ev_idle *w) { if (ev_is_active (w)) return; - ev_start ((W)w, 1); - array_needsize (signals, signalmax, w->signum, signals_init); - wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); - - if (!w->next) - { - struct sigaction sa; - sa.sa_handler = sighandler; - sigfillset (&sa.sa_mask); - sa.sa_flags = 0; - sigaction (w->signum, &sa, 0); - } + ev_start (EV_A_ (W)w, ++idlecnt); + array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void)); + idles [idlecnt - 1] = w; } void -evsignal_stop (struct ev_signal *w) +ev_idle_stop (EV_P_ struct ev_idle *w) { + ev_clear_pending (EV_A_ (W)w); if (!ev_is_active (w)) return; - wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); - ev_stop ((W)w); - - if (!signals [w->signum - 1].head) - signal (w->signum, SIG_DFL); + idles [((W)w)->active - 1] = idles [--idlecnt]; + ev_stop (EV_A_ (W)w); } -void evidle_start (struct ev_idle *w) +void +ev_prepare_start (EV_P_ struct ev_prepare *w) { if (ev_is_active (w)) return; - ev_start ((W)w, ++idlecnt); - array_needsize (idles, idlemax, idlecnt, ); - idles [idlecnt - 1] = w; + ev_start (EV_A_ (W)w, ++preparecnt); + array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void)); + prepares [preparecnt - 1] = w; } -void evidle_stop (struct ev_idle *w) +void +ev_prepare_stop (EV_P_ struct ev_prepare *w) { - idles [w->active - 1] = idles [--idlecnt]; - ev_stop ((W)w); + ev_clear_pending (EV_A_ (W)w); + if (!ev_is_active (w)) + return; + + prepares [((W)w)->active - 1] = prepares [--preparecnt]; + ev_stop (EV_A_ (W)w); } -void evcheck_start (struct ev_check *w) +void +ev_check_start (EV_P_ struct ev_check *w) { if (ev_is_active (w)) return; - ev_start ((W)w, ++checkcnt); - array_needsize (checks, checkmax, checkcnt, ); + ev_start (EV_A_ (W)w, ++checkcnt); + array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void)); checks [checkcnt - 1] = w; } -void evcheck_stop (struct ev_check *w) +void +ev_check_stop (EV_P_ struct ev_check *w) { - checks [w->active - 1] = checks [--checkcnt]; - ev_stop ((W)w); + ev_clear_pending (EV_A_ (W)w); + if (!ev_is_active (w)) + return; + + checks [((W)w)->active - 1] = checks [--checkcnt]; + ev_stop (EV_A_ (W)w); } -/*****************************************************************************/ +#ifndef SA_RESTART +# define SA_RESTART 0 +#endif + +void +ev_signal_start (EV_P_ struct ev_signal *w) +{ +#if EV_MULTIPLICITY + assert (("signal watchers are only supported in the default loop", loop == default_loop)); +#endif + if (ev_is_active (w)) + return; -#if 0 + assert (("ev_signal_start called with illegal signal number", w->signum > 0)); -struct ev_io wio; + ev_start (EV_A_ (W)w, 1); + array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); + wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); -static void -sin_cb (struct ev_io *w, int revents) -{ - fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); + if (!((WL)w)->next) + { +#if _WIN32 + signal (w->signum, sighandler); +#else + struct sigaction sa; + sa.sa_handler = sighandler; + sigfillset (&sa.sa_mask); + sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ + sigaction (w->signum, &sa, 0); +#endif + } } -static void -ocb (struct ev_timer *w, int revents) +void +ev_signal_stop (EV_P_ struct ev_signal *w) { - //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); - evtimer_stop (w); - evtimer_start (w); + ev_clear_pending (EV_A_ (W)w); + if (!ev_is_active (w)) + return; + + wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); + ev_stop (EV_A_ (W)w); + + if (!signals [w->signum - 1].head) + signal (w->signum, SIG_DFL); } -static void -scb (struct ev_signal *w, int revents) +void +ev_child_start (EV_P_ struct ev_child *w) { - fprintf (stderr, "signal %x,%d\n", revents, w->signum); - evio_stop (&wio); - evio_start (&wio); +#if EV_MULTIPLICITY + assert (("child watchers are only supported in the default loop", loop == default_loop)); +#endif + if (ev_is_active (w)) + return; + + ev_start (EV_A_ (W)w, 1); + wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); } -static void -gcb (struct ev_signal *w, int revents) +void +ev_child_stop (EV_P_ struct ev_child *w) { - fprintf (stderr, "generic %x\n", revents); + ev_clear_pending (EV_A_ (W)w); + if (!ev_is_active (w)) + return; + wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); + ev_stop (EV_A_ (W)w); } -int main (void) +/*****************************************************************************/ + +struct ev_once { - ev_init (0); + struct ev_io io; + struct ev_timer to; + void (*cb)(int revents, void *arg); + void *arg; +}; - evio_init (&wio, sin_cb, 0, EV_READ); - evio_start (&wio); +static void +once_cb (EV_P_ struct ev_once *once, int revents) +{ + void (*cb)(int revents, void *arg) = once->cb; + void *arg = once->arg; - struct ev_timer t[10000]; + ev_io_stop (EV_A_ &once->io); + ev_timer_stop (EV_A_ &once->to); + ev_free (once); -#if 0 - int i; - for (i = 0; i < 10000; ++i) - { - struct ev_timer *w = t + i; - evw_init (w, ocb, i); - evtimer_init_abs (w, ocb, drand48 (), 0.99775533); - evtimer_start (w); - if (drand48 () < 0.5) - evtimer_stop (w); - } -#endif + cb (revents, arg); +} - struct ev_timer t1; - evtimer_init (&t1, ocb, 5, 10); - evtimer_start (&t1); +static void +once_cb_io (EV_P_ struct ev_io *w, int revents) +{ + once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); +} - struct ev_signal sig; - evsignal_init (&sig, scb, SIGQUIT); - evsignal_start (&sig); +static void +once_cb_to (EV_P_ struct ev_timer *w, int revents) +{ + once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); +} - struct ev_check cw; - evcheck_init (&cw, gcb); - evcheck_start (&cw); +void +ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) +{ + struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); - struct ev_idle iw; - evidle_init (&iw, gcb); - evidle_start (&iw); + if (!once) + cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); + else + { + once->cb = cb; + once->arg = arg; - ev_loop (0); + ev_init (&once->io, once_cb_io); + if (fd >= 0) + { + ev_io_set (&once->io, fd, events); + ev_io_start (EV_A_ &once->io); + } - return 0; + ev_init (&once->to, once_cb_to); + if (timeout >= 0.) + { + ev_timer_set (&once->to, timeout, 0.); + ev_timer_start (EV_A_ &once->to); + } + } } +#ifdef __cplusplus +} #endif - - -