* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
* All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
+ * 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.
*
- * * 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.
+ * 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.
*/
#ifdef __cplusplus
# endif
# endif
+# ifndef EV_USE_NANOSLEEP
+# if HAVE_NANOSLEEP
+# define EV_USE_NANOSLEEP 1
+# else
+# define EV_USE_NANOSLEEP 0
+# endif
+# endif
+
# ifndef EV_USE_SELECT
# if HAVE_SELECT && HAVE_SYS_SELECT_H
# define EV_USE_SELECT 1
# define EV_USE_REALTIME 0
#endif
+#ifndef EV_USE_NANOSLEEP
+# define EV_USE_NANOSLEEP 0
+#endif
+
#ifndef EV_USE_SELECT
# define EV_USE_SELECT 1
#endif
# define EV_USE_REALTIME 0
#endif
-#if EV_SELECT_IS_WINSOCKET
-# include <winsock.h>
-#endif
-
#if !EV_STAT_ENABLE
+# undef EV_USE_INOTIFY
# define EV_USE_INOTIFY 0
#endif
+#if !EV_USE_NANOSLEEP
+# ifndef _WIN32
+# include <sys/select.h>
+# endif
+#endif
+
#if EV_USE_INOTIFY
# include <sys/inotify.h>
#endif
+#if EV_SELECT_IS_WINSOCKET
+# include <winsock.h>
+#endif
+
/**/
/*
#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
-#if __GNUC__ >= 3
+#if __GNUC__ >= 4
# define expect(expr,value) __builtin_expect ((expr),(value))
# define noinline __attribute__ ((noinline))
#else
typedef ev_watcher_list *WL;
typedef ev_watcher_time *WT;
-static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
+#if EV_USE_MONOTONIC
+/* sig_atomic_t is used to avoid per-thread variables or locking but still */
+/* giving it a reasonably high chance of working on typical architetcures */
+static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
+#endif
#ifdef _WIN32
# include "ev_win32.c"
}
#endif
+void
+ev_sleep (ev_tstamp delay)
+{
+ if (delay > 0.)
+ {
+#if EV_USE_NANOSLEEP
+ struct timespec ts;
+
+ ts.tv_sec = (time_t)delay;
+ ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
+
+ nanosleep (&ts, 0);
+#elif defined(_WIN32)
+ Sleep (delay * 1e3);
+#else
+ struct timeval tv;
+
+ tv.tv_sec = (time_t)delay;
+ tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
+
+ select (0, 0, 0, 0, &tv);
+#endif
+ }
+}
+
+/*****************************************************************************/
+
int inline_size
array_nextsize (int elem, int cur, int cnt)
{
ANFD *anfd = anfds + fd;
ev_io *w;
- int events = 0;
+ unsigned char events = 0;
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
- events |= w->events;
+ events |= (unsigned char)w->events;
#if EV_SELECT_IS_WINSOCKET
if (events)
{
unsigned long argp;
- anfd->handle = _get_osfhandle (fd);
+ #ifdef EV_FD_TO_WIN32_HANDLE
+ anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
+ #else
+ anfd->handle = _get_osfhandle (fd);
+ #endif
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
}
#endif
- anfd->reify = 0;
+ {
+ unsigned char o_events = anfd->events;
+ unsigned char o_reify = anfd->reify;
+
+ anfd->reify = 0;
+ anfd->events = events;
- backend_modify (EV_A_ fd, anfd->events, events);
- anfd->events = events;
+ if (o_events != events || o_reify & EV_IOFDSET)
+ backend_modify (EV_A_ fd, o_events, events);
+ }
}
fdchangecnt = 0;
}
void inline_size
-fd_change (EV_P_ int fd)
+fd_change (EV_P_ int fd, int flags)
{
- if (expect_false (anfds [fd].reify))
- return;
-
- anfds [fd].reify = 1;
+ unsigned char reify = anfds [fd].reify;
+ anfds [fd].reify |= flags;
- ++fdchangecnt;
- array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
- fdchanges [fdchangecnt - 1] = fd;
+ if (expect_true (!reify))
+ {
+ ++fdchangecnt;
+ array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
+ fdchanges [fdchangecnt - 1] = fd;
+ }
}
void inline_speed
if (anfds [fd].events)
{
anfds [fd].events = 0;
- fd_change (EV_A_ fd);
+ fd_change (EV_A_ fd, EV_IOFDSET | 1);
}
}
unsigned int
ev_embeddable_backends (void)
{
- return EVBACKEND_EPOLL
- | EVBACKEND_KQUEUE
- | EVBACKEND_PORT;
+ int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
+
+ /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
+ /* please fix it and tell me how to detect the fix */
+ flags &= ~EVBACKEND_EPOLL;
+
+ return flags;
}
unsigned int
return loop_count;
}
+void
+ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
+{
+ io_blocktime = interval;
+}
+
+void
+ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
+{
+ timeout_blocktime = interval;
+}
+
static void noinline
loop_init (EV_P_ unsigned int flags)
{
now_floor = mn_now;
rtmn_diff = ev_rt_now - mn_now;
+ io_blocktime = 0.;
+ timeout_blocktime = 0.;
+
/* pid check not overridable via env */
#ifndef _WIN32
if (flags & EVFLAG_FORKCHECK)
#endif
}
+ ev_free (anfds); anfdmax = 0;
+
/* have to use the microsoft-never-gets-it-right macro */
array_free (fdchange, EMPTY);
array_free (timer, EMPTY);
#if EV_PERIODIC_ENABLE
array_free (periodic, EMPTY);
+#endif
+#if EV_FORK_ENABLE
+ array_free (fork, EMPTY);
#endif
array_free (prepare, EMPTY);
array_free (check, EMPTY);
syserr ("(libev) error creating pipe");
siginit (EV_A);
+ sigcb (EV_A_ &sigev, EV_READ);
}
postfork = 0;
void
ev_loop_fork (EV_P)
{
- postfork = 1;
+ postfork = 1; // must be in line with ev_default_fork
}
#endif
#endif
if (backend)
- postfork = 1;
+ postfork = 1; // must be in line with ev_loop_fork
}
/*****************************************************************************/
/* calculate blocking time */
{
- ev_tstamp block;
+ ev_tstamp waittime = 0.;
+ ev_tstamp sleeptime = 0.;
- if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
- block = 0.; /* do not block at all */
- else
+ if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
{
/* update time to cancel out callback processing overhead */
time_update (EV_A_ 1e100);
- block = MAX_BLOCKTIME;
+ waittime = MAX_BLOCKTIME;
if (timercnt)
{
ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
- if (block > to) block = to;
+ if (waittime > to) waittime = to;
}
#if EV_PERIODIC_ENABLE
if (periodiccnt)
{
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
- if (block > to) block = to;
+ if (waittime > to) waittime = to;
}
#endif
- if (expect_false (block < 0.)) block = 0.;
+ if (expect_false (waittime < timeout_blocktime))
+ waittime = timeout_blocktime;
+
+ sleeptime = waittime - backend_fudge;
+
+ if (expect_true (sleeptime > io_blocktime))
+ sleeptime = io_blocktime;
+
+ if (sleeptime)
+ {
+ ev_sleep (sleeptime);
+ waittime -= sleeptime;
+ }
}
++loop_count;
- backend_poll (EV_A_ block);
+ backend_poll (EV_A_ waittime);
/* update ev_rt_now, do magic */
- time_update (EV_A_ block);
+ time_update (EV_A_ waittime + sleeptime);
}
/* queue pending timers and reschedule them */
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
wlist_add (&anfds[fd].head, (WL)w);
- fd_change (EV_A_ fd);
+ fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
+ w->events &= ~EV_IOFDSET;
}
void noinline
wlist_del (&anfds[w->fd].head, (WL)w);
ev_stop (EV_A_ (W)w);
- fd_change (EV_A_ w->fd);
+ fd_change (EV_A_ w->fd, 1);
}
void noinline
void noinline
ev_embed_sweep (EV_P_ ev_embed *w)
{
- ev_loop (w->loop, EVLOOP_NONBLOCK);
+ ev_loop (w->other, EVLOOP_NONBLOCK);
}
static void
-embed_cb (EV_P_ ev_io *io, int revents)
+embed_io_cb (EV_P_ ev_io *io, int revents)
{
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
if (ev_cb (w))
ev_feed_event (EV_A_ (W)w, EV_EMBED);
else
- ev_embed_sweep (loop, w);
+ ev_loop (w->other, EVLOOP_NONBLOCK);
+}
+
+static void
+embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
+{
+ ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
+
+ {
+ struct ev_loop *loop = w->other;
+
+ while (fdchangecnt)
+ {
+ fd_reify (EV_A);
+ ev_loop (EV_A_ EVLOOP_NONBLOCK);
+ }
+ }
}
+#if 0
+static void
+embed_idle_cb (EV_P_ ev_idle *idle, int revents)
+{
+ ev_idle_stop (EV_A_ idle);
+}
+#endif
+
void
ev_embed_start (EV_P_ ev_embed *w)
{
return;
{
- struct ev_loop *loop = w->loop;
+ struct ev_loop *loop = w->other;
assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
- ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
+ ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
}
ev_set_priority (&w->io, ev_priority (w));
ev_io_start (EV_A_ &w->io);
+ ev_prepare_init (&w->prepare, embed_prepare_cb);
+ ev_set_priority (&w->prepare, EV_MINPRI);
+ ev_prepare_start (EV_A_ &w->prepare);
+
+ /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
+
ev_start (EV_A_ (W)w, 1);
}
return;
ev_io_stop (EV_A_ &w->io);
+ ev_prepare_stop (EV_A_ &w->prepare);
ev_stop (EV_A_ (W)w);
}
}
}
+#if EV_MULTIPLICITY
+ #include "ev_wrap.h"
+#endif
+
#ifdef __cplusplus
}
#endif
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