/*
+ * libev event processing core, watcher management
+ *
* 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:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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 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
+extern "C" {
+#endif
+
+#ifndef EV_STANDALONE
+# ifdef EV_CONFIG_H
+# include EV_CONFIG_H
+# else
+# include "config.h"
+# endif
+
+# if HAVE_CLOCK_GETTIME
+# ifndef EV_USE_MONOTONIC
+# define EV_USE_MONOTONIC 1
+# endif
+# ifndef EV_USE_REALTIME
+# define EV_USE_REALTIME 1
+# endif
+# else
+# ifndef EV_USE_MONOTONIC
+# define EV_USE_MONOTONIC 0
+# endif
+# ifndef EV_USE_REALTIME
+# define EV_USE_REALTIME 0
+# 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
+# else
+# define EV_USE_SELECT 0
+# endif
+# endif
+
+# ifndef EV_USE_POLL
+# if HAVE_POLL && HAVE_POLL_H
+# define EV_USE_POLL 1
+# else
+# define EV_USE_POLL 0
+# endif
+# endif
+
+# ifndef EV_USE_EPOLL
+# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
+# define EV_USE_EPOLL 1
+# else
+# define EV_USE_EPOLL 0
+# endif
+# endif
+
+# ifndef EV_USE_KQUEUE
+# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
+# define EV_USE_KQUEUE 1
+# else
+# define EV_USE_KQUEUE 0
+# endif
+# endif
+
+# ifndef EV_USE_PORT
+# if HAVE_PORT_H && HAVE_PORT_CREATE
+# define EV_USE_PORT 1
+# else
+# define EV_USE_PORT 0
+# endif
+# endif
+
+# ifndef EV_USE_INOTIFY
+# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
+# define EV_USE_INOTIFY 1
+# else
+# define EV_USE_INOTIFY 0
+# endif
+# endif
+
+#endif
+
#include <math.h>
#include <stdlib.h>
-#include <unistd.h>
#include <fcntl.h>
-#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/time.h>
#include <time.h>
-#ifndef HAVE_MONOTONIC
-# ifdef CLOCK_MONOTONIC
-# define HAVE_MONOTONIC 1
+#include <signal.h>
+
+#ifdef EV_H
+# include EV_H
+#else
+# include "ev.h"
+#endif
+
+#ifndef _WIN32
+# include <sys/time.h>
+# include <sys/wait.h>
+# include <unistd.h>
+#else
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# ifndef EV_SELECT_IS_WINSOCKET
+# define EV_SELECT_IS_WINSOCKET 1
+# endif
+#endif
+
+/**/
+
+#ifndef EV_USE_MONOTONIC
+# define EV_USE_MONOTONIC 0
+#endif
+
+#ifndef EV_USE_REALTIME
+# 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
+
+#ifndef EV_USE_POLL
+# ifdef _WIN32
+# define EV_USE_POLL 0
+# else
+# define EV_USE_POLL 1
+# endif
+#endif
+
+#ifndef EV_USE_EPOLL
+# define EV_USE_EPOLL 0
+#endif
+
+#ifndef EV_USE_KQUEUE
+# define EV_USE_KQUEUE 0
+#endif
+
+#ifndef EV_USE_PORT
+# define EV_USE_PORT 0
+#endif
+
+#ifndef EV_USE_INOTIFY
+# define EV_USE_INOTIFY 0
+#endif
+
+#ifndef EV_PID_HASHSIZE
+# if EV_MINIMAL
+# define EV_PID_HASHSIZE 1
+# else
+# define EV_PID_HASHSIZE 16
# endif
#endif
-#ifndef HAVE_SELECT
-# define HAVE_SELECT 1
+#ifndef EV_INOTIFY_HASHSIZE
+# if EV_MINIMAL
+# define EV_INOTIFY_HASHSIZE 1
+# else
+# define EV_INOTIFY_HASHSIZE 16
+# endif
+#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_STAT_ENABLE
+# undef EV_USE_INOTIFY
+# define EV_USE_INOTIFY 0
#endif
-#ifndef HAVE_EPOLL
-# define HAVE_EPOLL 0
+#if !EV_USE_NANOSLEEP
+# ifndef _WIN32
+# include <sys/select.h>
+# endif
+#endif
+
+#if EV_USE_INOTIFY
+# include <sys/inotify.h>
#endif
-#ifndef HAVE_REALTIME
-# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
+#if EV_SELECT_IS_WINSOCKET
+# include <winsock.h>
#endif
+/**/
+
+/*
+ * This is used to avoid floating point rounding problems.
+ * It is added to ev_rt_now when scheduling periodics
+ * to ensure progress, time-wise, even when rounding
+ * errors are against us.
+ * This value is good at least till the year 4000.
+ * Better solutions welcome.
+ */
+#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
+
#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
-#define MAX_BLOCKTIME 60.
-#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
+#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__ >= 4
+# define expect(expr,value) __builtin_expect ((expr),(value))
+# define noinline __attribute__ ((noinline))
+#else
+# define expect(expr,value) (expr)
+# define noinline
+# if __STDC_VERSION__ < 199901L
+# define inline
+# endif
+#endif
+
+#define expect_false(expr) expect ((expr) != 0, 0)
+#define expect_true(expr) expect ((expr) != 0, 1)
+#define inline_size static inline
+
+#if EV_MINIMAL
+# define inline_speed static noinline
+#else
+# define inline_speed static inline
+#endif
+
+#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
+#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
+
+#define EMPTY /* required for microsofts broken pseudo-c compiler */
+#define EMPTY2(a,b) /* used to suppress some warnings */
+
+typedef ev_watcher *W;
+typedef ev_watcher_list *WL;
+typedef ev_watcher_time *WT;
+
+#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
+
+/*****************************************************************************/
+
+static void (*syserr_cb)(const char *msg);
+
+void
+ev_set_syserr_cb (void (*cb)(const char *msg))
+{
+ syserr_cb = cb;
+}
+
+static void noinline
+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;
+}
+
+inline_speed 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;
+
+#if EV_USE_INOTIFY
+typedef struct
+{
+ WL head;
+} ANFS;
+#endif
+
+#if EV_MULTIPLICITY
+
+ struct ev_loop
+ {
+ ev_tstamp ev_rt_now;
+ #define ev_rt_now ((loop)->ev_rt_now)
+ #define VAR(name,decl) decl;
+ #include "ev_vars.h"
+ #undef VAR
+ };
+ #include "ev_wrap.h"
-#include "ev.h"
+ static struct ev_loop default_loop_struct;
+ struct ev_loop *ev_default_loop_ptr;
-typedef struct ev_watcher *W;
-typedef struct ev_watcher_list *WL;
-typedef struct ev_watcher_time *WT;
+#else
-static ev_tstamp now, diff; /* monotonic clock */
-ev_tstamp ev_now;
-int ev_method;
+ ev_tstamp ev_rt_now;
+ #define VAR(name,decl) static decl;
+ #include "ev_vars.h"
+ #undef VAR
-static int have_monotonic; /* runtime */
+ static int ev_default_loop_ptr;
-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);
+#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;
#endif
}
-static ev_tstamp
+ev_tstamp inline_size
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);
return ev_time ();
}
-#define array_needsize(base,cur,cnt,init) \
- if ((cnt) > cur) \
- { \
- int newcnt = cur; \
- do \
- { \
- newcnt = (newcnt << 1) | 4 & ~3; \
- } \
- while ((cnt) > newcnt); \
- \
- 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
-typedef struct
+void
+ev_sleep (ev_tstamp delay)
{
- struct ev_io *head;
- unsigned char wev, rev; /* want, received event set */
-} ANFD;
+ if (delay > 0.)
+ {
+#if EV_USE_NANOSLEEP
+ struct timespec ts;
-static ANFD *anfds;
-static int anfdmax;
+ ts.tv_sec = (time_t)delay;
+ ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
-static int *fdchanges;
-static int fdchangemax, fdchangecnt;
+ nanosleep (&ts, 0);
+#elif defined(_WIN32)
+ Sleep (delay * 1e3);
+#else
+ struct timeval tv;
-static void
-anfds_init (ANFD *base, int count)
-{
- while (count--)
- {
- base->head = 0;
- base->wev = base->rev = EV_NONE;
- ++base;
+ tv.tv_sec = (time_t)delay;
+ tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
+
+ select (0, 0, 0, 0, &tv);
+#endif
}
}
-typedef struct
+/*****************************************************************************/
+
+int inline_size
+array_nextsize (int elem, int cur, int cnt)
{
- W w;
- int events;
-} ANPENDING;
+ int ncur = cur + 1;
-static ANPENDING *pendings;
-static int pendingmax, pendingcnt;
+ do
+ ncur <<= 1;
+ while (cnt > ncur);
-static void
-event (W w, int events)
-{
- if (w->active)
+ /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
+ if (elem * ncur > 4096)
{
- w->pending = ++pendingcnt;
- array_needsize (pendings, pendingmax, pendingcnt, );
- pendings [pendingcnt - 1].w = w;
- pendings [pendingcnt - 1].events = events;
+ ncur *= elem;
+ ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
+ ncur = ncur - sizeof (void *) * 4;
+ ncur /= elem;
}
+
+ return ncur;
}
-static void
-fd_event (int fd, int events)
+static noinline void *
+array_realloc (int elem, void *base, int *cur, int cnt)
{
- ANFD *anfd = anfds + fd;
- struct ev_io *w;
+ *cur = array_nextsize (elem, *cur, cnt);
+ return ev_realloc (base, elem * *cur);
+}
- for (w = anfd->head; w; w = w->next)
- {
- int ev = w->events & events;
+#define array_needsize(type,base,cur,cnt,init) \
+ if (expect_false ((cnt) > (cur))) \
+ { \
+ int ocur_ = (cur); \
+ (base) = (type *)array_realloc \
+ (sizeof (type), (base), &(cur), (cnt)); \
+ init ((base) + (ocur_), (cur) - ocur_); \
+ }
- if (ev)
- event ((W)w, ev);
+#if 0
+#define array_slim(type,stem) \
+ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
+ { \
+ stem ## max = array_roundsize (stem ## cnt >> 1); \
+ base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
+ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
}
-}
+#endif
-static void
-queue_events (W *events, int eventcnt, int type)
+#define array_free(stem, idx) \
+ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
+
+/*****************************************************************************/
+
+void noinline
+ev_feed_event (EV_P_ void *w, int revents)
{
- int i;
+ W w_ = (W)w;
+ int pri = ABSPRI (w_);
- for (i = 0; i < eventcnt; ++i)
- event (events [i], type);
+ if (expect_false (w_->pending))
+ pendings [pri][w_->pending - 1].events |= revents;
+ else
+ {
+ w_->pending = ++pendingcnt [pri];
+ array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
+ pendings [pri][w_->pending - 1].w = w_;
+ pendings [pri][w_->pending - 1].events = revents;
+ }
}
-/* called on EBADF to verify fds */
-static void
-fd_recheck (void)
+void inline_speed
+queue_events (EV_P_ W *events, int eventcnt, int type)
{
- int fd;
+ int i;
- for (fd = 0; fd < anfdmax; ++fd)
- if (anfds [fd].wev)
- if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
- while (anfds [fd].head)
- {
- event ((W)anfds [fd].head, EV_ERROR);
- evio_stop (anfds [fd].head);
- }
+ for (i = 0; i < eventcnt; ++i)
+ ev_feed_event (EV_A_ events [i], type);
}
/*****************************************************************************/
-static struct ev_timer **timers;
-static int timermax, timercnt;
+void inline_size
+anfds_init (ANFD *base, int count)
+{
+ while (count--)
+ {
+ base->head = 0;
+ base->events = EV_NONE;
+ base->reify = 0;
-static struct ev_periodic **periodics;
-static int periodicmax, periodiccnt;
+ ++base;
+ }
+}
-static void
-upheap (WT *timers, int k)
+void inline_speed
+fd_event (EV_P_ int fd, int revents)
{
- WT w = timers [k];
+ ANFD *anfd = anfds + fd;
+ ev_io *w;
- while (k && timers [k >> 1]->at > w->at)
+ for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
{
- timers [k] = timers [k >> 1];
- timers [k]->active = k + 1;
- k >>= 1;
- }
+ int ev = w->events & revents;
- timers [k] = w;
- timers [k]->active = k + 1;
+ if (ev)
+ ev_feed_event (EV_A_ (W)w, ev);
+ }
+}
+void
+ev_feed_fd_event (EV_P_ int fd, int revents)
+{
+ if (fd >= 0 && fd < anfdmax)
+ fd_event (EV_A_ fd, revents);
}
-static void
-downheap (WT *timers, int N, int k)
+void inline_size
+fd_reify (EV_P)
{
- WT w = timers [k];
+ int i;
- while (k < (N >> 1))
+ for (i = 0; i < fdchangecnt; ++i)
{
- int j = k << 1;
-
- if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
- ++j;
+ int fd = fdchanges [i];
+ ANFD *anfd = anfds + fd;
+ ev_io *w;
- if (w->at <= timers [j]->at)
- break;
+ unsigned char events = 0;
- timers [k] = timers [j];
- timers [k]->active = k + 1;
- k = j;
- }
+ for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
+ events |= (unsigned char)w->events;
- timers [k] = w;
- timers [k]->active = k + 1;
-}
+#if EV_SELECT_IS_WINSOCKET
+ if (events)
+ {
+ unsigned long argp;
+ #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
-/*****************************************************************************/
+ {
+ unsigned char o_events = anfd->events;
+ unsigned char o_reify = anfd->reify;
-typedef struct
-{
- struct ev_signal *head;
- sig_atomic_t gotsig;
-} ANSIG;
+ anfd->reify = 0;
+ anfd->events = events;
-static ANSIG *signals;
-static int signalmax;
+ if (o_events != events || o_reify & EV_IOFDSET)
+ backend_modify (EV_A_ fd, o_events, events);
+ }
+ }
-static int sigpipe [2];
-static sig_atomic_t gotsig;
-static struct ev_io sigev;
+ fdchangecnt = 0;
+}
-static void
-signals_init (ANSIG *base, int count)
+void inline_size
+fd_change (EV_P_ int fd, int flags)
{
- while (count--)
+ unsigned char reify = anfds [fd].reify;
+ anfds [fd].reify |= flags;
+
+ if (expect_true (!reify))
{
- base->head = 0;
- base->gotsig = 0;
- ++base;
+ ++fdchangecnt;
+ array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
+ fdchanges [fdchangecnt - 1] = fd;
}
}
-static void
-sighandler (int signum)
+void inline_speed
+fd_kill (EV_P_ int fd)
{
- signals [signum - 1].gotsig = 1;
+ ev_io *w;
- if (!gotsig)
+ while ((w = (ev_io *)anfds [fd].head))
{
- gotsig = 1;
- write (sigpipe [1], &gotsig, 1);
+ ev_io_stop (EV_A_ w);
+ ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
}
}
-static void
-sigcb (struct ev_io *iow, int revents)
+int inline_size
+fd_valid (int fd)
{
- struct ev_signal *w;
- int sig;
+#ifdef _WIN32
+ return _get_osfhandle (fd) != -1;
+#else
+ return fcntl (fd, F_GETFD) != -1;
+#endif
+}
- gotsig = 0;
- read (sigpipe [0], &revents, 1);
+/* called on EBADF to verify fds */
+static void noinline
+fd_ebadf (EV_P)
+{
+ int fd;
- for (sig = signalmax; sig--; )
- if (signals [sig].gotsig)
- {
- signals [sig].gotsig = 0;
+ 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 noinline
+fd_enomem (EV_P)
+{
+ int fd;
- for (w = signals [sig].head; w; w = w->next)
- event ((W)w, EV_SIGNAL);
+ for (fd = anfdmax; fd--; )
+ if (anfds [fd].events)
+ {
+ fd_kill (EV_A_ fd);
+ return;
}
}
-static void
-siginit (void)
+/* usually called after fork if backend needs to re-arm all fds from scratch */
+static void noinline
+fd_rearm_all (EV_P)
{
- fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
- fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
+ int fd;
+
+ for (fd = 0; fd < anfdmax; ++fd)
+ if (anfds [fd].events)
+ {
+ anfds [fd].events = 0;
+ fd_change (EV_A_ fd, EV_IOFDSET | 1);
+ }
+}
+
+/*****************************************************************************/
+
+void inline_speed
+upheap (WT *heap, int k)
+{
+ WT w = heap [k];
+
+ while (k)
+ {
+ int p = (k - 1) >> 1;
+
+ if (heap [p]->at <= w->at)
+ break;
+
+ heap [k] = heap [p];
+ ((W)heap [k])->active = k + 1;
+ k = p;
+ }
- /* 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);
+ heap [k] = w;
+ ((W)heap [k])->active = k + 1;
+}
+
+void inline_speed
+downheap (WT *heap, int N, int k)
+{
+ WT w = heap [k];
+
+ for (;;)
+ {
+ int c = (k << 1) + 1;
+
+ if (c >= N)
+ break;
+
+ c += c + 1 < N && heap [c]->at > heap [c + 1]->at
+ ? 1 : 0;
- evio_set (&sigev, sigpipe [0], EV_READ);
- evio_start (&sigev);
+ if (w->at <= heap [c]->at)
+ break;
+
+ heap [k] = heap [c];
+ ((W)heap [k])->active = k + 1;
+
+ k = c;
+ }
+
+ heap [k] = w;
+ ((W)heap [k])->active = k + 1;
+}
+
+void inline_size
+adjustheap (WT *heap, int N, int k)
+{
+ upheap (heap, k);
+ downheap (heap, N, k);
}
/*****************************************************************************/
-static struct ev_idle **idles;
-static int idlemax, idlecnt;
+typedef struct
+{
+ WL head;
+ sig_atomic_t volatile gotsig;
+} ANSIG;
+
+static ANSIG *signals;
+static int signalmax;
+
+static int sigpipe [2];
+static sig_atomic_t volatile gotsig;
+static ev_io sigev;
+
+void inline_size
+signals_init (ANSIG *base, int count)
+{
+ while (count--)
+ {
+ base->head = 0;
+ base->gotsig = 0;
+
+ ++base;
+ }
+}
+
+static void
+sighandler (int signum)
+{
+#if _WIN32
+ signal (signum, sighandler);
+#endif
+
+ signals [signum - 1].gotsig = 1;
+
+ if (!gotsig)
+ {
+ int old_errno = errno;
+ gotsig = 1;
+ write (sigpipe [1], &signum, 1);
+ errno = old_errno;
+ }
+}
+
+void noinline
+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 == ev_default_loop_ptr));
+#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_ 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);
+}
+
+void inline_speed
+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 struct ev_prepare **prepares;
-static int preparemax, preparecnt;
+static void noinline
+siginit (EV_P)
+{
+ fd_intern (sigpipe [0]);
+ fd_intern (sigpipe [1]);
-static struct ev_check **checks;
-static int checkmax, checkcnt;
+ 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];
-static struct ev_signal childev;
+static WL childs [EV_PID_HASHSIZE];
+
+#ifndef _WIN32
+
+static ev_signal childev;
+
+void inline_speed
+child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
+{
+ ev_child *w;
+
+ for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
+ if (w->pid == pid || !w->pid)
+ {
+ ev_set_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);
+ }
+}
#ifndef WCONTINUED
# define WCONTINUED 0
#endif
static void
-childcb (struct ev_signal *sw, int revents)
+childcb (EV_P_ ev_signal *sw, int revents)
{
- struct ev_child *w;
int pid, status;
- while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
- for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
- if (w->pid == pid || w->pid == -1)
- {
- w->status = status;
- event ((W)w, EV_CHILD);
- }
+ /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
+ if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
+ if (!WCONTINUED
+ || errno != EINVAL
+ || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
+ return;
+
+ /* make sure we are called again until all childs have been reaped */
+ /* we need to do it this way so that the callback gets called before we continue */
+ ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
+
+ child_reap (EV_A_ sw, pid, pid, status);
+ if (EV_PID_HASHSIZE > 1)
+ child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
}
+#endif
+
/*****************************************************************************/
-#if HAVE_EPOLL
+#if EV_USE_PORT
+# include "ev_port.c"
+#endif
+#if EV_USE_KQUEUE
+# include "ev_kqueue.c"
+#endif
+#if EV_USE_EPOLL
# include "ev_epoll.c"
#endif
-#if HAVE_SELECT
+#if EV_USE_POLL
+# include "ev_poll.c"
+#endif
+#if EV_USE_SELECT
# include "ev_select.c"
#endif
return EV_VERSION_MINOR;
}
-int ev_init (int flags)
+/* return true if we are running with elevated privileges and should ignore env variables */
+int inline_size
+enable_secure (void)
+{
+#ifdef _WIN32
+ return 0;
+#else
+ return getuid () != geteuid ()
+ || getgid () != getegid ();
+#endif
+}
+
+unsigned int
+ev_supported_backends (void)
+{
+ unsigned int flags = 0;
+
+ if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
+ if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
+ if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
+ if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
+ if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
+
+ return flags;
+}
+
+unsigned int
+ev_recommended_backends (void)
+{
+ unsigned int flags = ev_supported_backends ();
+
+#ifndef __NetBSD__
+ /* kqueue is borked on everything but netbsd apparently */
+ /* it usually doesn't work correctly on anything but sockets and pipes */
+ flags &= ~EVBACKEND_KQUEUE;
+#endif
+#ifdef __APPLE__
+ // flags &= ~EVBACKEND_KQUEUE; for documentation
+ flags &= ~EVBACKEND_POLL;
+#endif
+
+ return flags;
+}
+
+unsigned int
+ev_embeddable_backends (void)
+{
+ 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
+ev_backend (EV_P)
+{
+ return backend;
+}
+
+unsigned int
+ev_loop_count (EV_P)
+{
+ 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)
{
- if (!ev_method)
+ if (!backend)
{
-#if HAVE_MONOTONIC
+#if EV_USE_MONOTONIC
{
struct timespec ts;
if (!clock_gettime (CLOCK_MONOTONIC, &ts))
}
#endif
- ev_now = ev_time ();
- now = get_clock ();
- diff = ev_now - now;
+ ev_rt_now = ev_time ();
+ mn_now = get_clock ();
+ 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)
+ curpid = getpid ();
+#endif
+
+ if (!(flags & EVFLAG_NOENV)
+ && !enable_secure ()
+ && getenv ("LIBEV_FLAGS"))
+ flags = atoi (getenv ("LIBEV_FLAGS"));
+
+ if (!(flags & 0x0000ffffUL))
+ flags |= ev_recommended_backends ();
- if (pipe (sigpipe))
- return 0;
+ backend = 0;
+ backend_fd = -1;
+#if EV_USE_INOTIFY
+ fs_fd = -2;
+#endif
- ev_method = EVMETHOD_NONE;
-#if HAVE_EPOLL
- if (ev_method == EVMETHOD_NONE) epoll_init (flags);
+#if EV_USE_PORT
+ if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
+#endif
+#if EV_USE_KQUEUE
+ if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
#endif
-#if HAVE_SELECT
- if (ev_method == EVMETHOD_NONE) select_init (flags);
+#if EV_USE_EPOLL
+ if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
+#endif
+#if EV_USE_POLL
+ if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
+#endif
+#if EV_USE_SELECT
+ if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
#endif
- if (ev_method)
- {
- evw_init (&sigev, sigcb);
- siginit ();
+ ev_init (&sigev, sigcb);
+ ev_set_priority (&sigev, EV_MAXPRI);
+ }
+}
- evsignal_init (&childev, childcb, SIGCHLD);
- evsignal_start (&childev);
- }
+static void noinline
+loop_destroy (EV_P)
+{
+ int i;
+
+#if EV_USE_INOTIFY
+ if (fs_fd >= 0)
+ close (fs_fd);
+#endif
+
+ if (backend_fd >= 0)
+ close (backend_fd);
+
+#if EV_USE_PORT
+ if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
+#endif
+#if EV_USE_KQUEUE
+ if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
+#endif
+#if EV_USE_EPOLL
+ if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
+#endif
+#if EV_USE_POLL
+ if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
+#endif
+#if EV_USE_SELECT
+ if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
+#endif
+
+ for (i = NUMPRI; i--; )
+ {
+ array_free (pending, [i]);
+#if EV_IDLE_ENABLE
+ array_free (idle, [i]);
+#endif
}
- return ev_method;
+ 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);
+
+ backend = 0;
}
-/*****************************************************************************/
+void inline_size infy_fork (EV_P);
+
+void inline_size
+loop_fork (EV_P)
+{
+#if EV_USE_PORT
+ if (backend == EVBACKEND_PORT ) port_fork (EV_A);
+#endif
+#if EV_USE_KQUEUE
+ if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
+#endif
+#if EV_USE_EPOLL
+ if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
+#endif
+#if EV_USE_INOTIFY
+ infy_fork (EV_A);
+#endif
+
+ if (ev_is_active (&sigev))
+ {
+ /* default loop */
+
+ ev_ref (EV_A);
+ ev_io_stop (EV_A_ &sigev);
+ close (sigpipe [0]);
+ close (sigpipe [1]);
+
+ while (pipe (sigpipe))
+ syserr ("(libev) error creating pipe");
+
+ siginit (EV_A);
+ sigcb (EV_A_ &sigev, EV_READ);
+ }
+
+ postfork = 0;
+}
+
+#if EV_MULTIPLICITY
+struct ev_loop *
+ev_loop_new (unsigned int flags)
+{
+ struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
+
+ memset (loop, 0, sizeof (struct ev_loop));
+
+ loop_init (EV_A_ flags);
+
+ if (ev_backend (EV_A))
+ return loop;
+
+ return 0;
+}
+
+void
+ev_loop_destroy (EV_P)
+{
+ loop_destroy (EV_A);
+ ev_free (loop);
+}
void
-ev_prefork (void)
+ev_loop_fork (EV_P)
+{
+ postfork = 1; // must be in line with ev_default_fork
+}
+
+#endif
+
+#if EV_MULTIPLICITY
+struct ev_loop *
+ev_default_loop_init (unsigned int flags)
+#else
+int
+ev_default_loop (unsigned int flags)
+#endif
{
- /* nop */
+ if (sigpipe [0] == sigpipe [1])
+ if (pipe (sigpipe))
+ return 0;
+
+ if (!ev_default_loop_ptr)
+ {
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
+#else
+ ev_default_loop_ptr = 1;
+#endif
+
+ loop_init (EV_A_ flags);
+
+ if (ev_backend (EV_A))
+ {
+ siginit (EV_A);
+
+#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
+ }
+ else
+ ev_default_loop_ptr = 0;
+ }
+
+ return ev_default_loop_ptr;
}
void
-ev_postfork_parent (void)
+ev_default_destroy (void)
{
- /* nop */
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = ev_default_loop_ptr;
+#endif
+
+#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)
+ev_default_fork (void)
{
-#if HAVE_EPOLL
- if (ev_method == EVMETHOD_EPOLL)
- epoll_postfork_child ();
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = ev_default_loop_ptr;
#endif
- evio_stop (&sigev);
- close (sigpipe [0]);
- close (sigpipe [1]);
- pipe (sigpipe);
- siginit ();
+ if (backend)
+ postfork = 1; // must be in line with ev_loop_fork
}
/*****************************************************************************/
-static void
-fd_reify (void)
+void
+ev_invoke (EV_P_ void *w, int revents)
{
- int i;
+ EV_CB_INVOKE ((W)w, revents);
+}
- for (i = 0; i < fdchangecnt; ++i)
- {
- int fd = fdchanges [i];
- ANFD *anfd = anfds + fd;
- struct ev_io *w;
+void inline_speed
+call_pending (EV_P)
+{
+ int pri;
+
+ for (pri = NUMPRI; pri--; )
+ while (pendingcnt [pri])
+ {
+ ANPENDING *p = pendings [pri] + --pendingcnt [pri];
+
+ if (expect_true (p->w))
+ {
+ /*assert (("non-pending watcher on pending list", p->w->pending));*/
+
+ p->w->pending = 0;
+ EV_CB_INVOKE (p->w, p->events);
+ }
+ }
+}
- int wev = 0;
+void inline_size
+timers_reify (EV_P)
+{
+ while (timercnt && ((WT)timers [0])->at <= mn_now)
+ {
+ ev_timer *w = (ev_timer *)timers [0];
- for (w = anfd->head; w; w = w->next)
- wev |= w->events;
+ /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
- if (anfd->wev != wev)
+ /* first reschedule or stop timer */
+ if (w->repeat)
{
- method_modify (fd, anfd->wev, wev);
- anfd->wev = wev;
+ 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 (timers, timercnt, 0);
}
+ else
+ ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
+
+ ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
+ }
+}
+
+#if EV_PERIODIC_ENABLE
+void inline_size
+periodics_reify (EV_P)
+{
+ while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
+ {
+ ev_periodic *w = (ev_periodic *)periodics [0];
+
+ /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
+
+ /* first reschedule or stop timer */
+ if (w->reschedule_cb)
+ {
+ ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
+ assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
+ downheap (periodics, periodiccnt, 0);
+ }
+ else if (w->interval)
+ {
+ ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
+ if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
+ assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
+ downheap (periodics, periodiccnt, 0);
+ }
+ else
+ ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
+
+ ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
+ }
+}
+
+static void noinline
+periodics_reschedule (EV_P)
+{
+ int i;
+
+ /* adjust periodics after time jump */
+ for (i = 0; i < periodiccnt; ++i)
+ {
+ ev_periodic *w = (ev_periodic *)periodics [i];
+
+ if (w->reschedule_cb)
+ ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
+ else if (w->interval)
+ ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
+ }
+
+ /* now rebuild the heap */
+ for (i = periodiccnt >> 1; i--; )
+ downheap (periodics, periodiccnt, i);
+}
+#endif
+
+#if EV_IDLE_ENABLE
+void inline_size
+idle_reify (EV_P)
+{
+ if (expect_false (idleall))
+ {
+ int pri;
+
+ for (pri = NUMPRI; pri--; )
+ {
+ if (pendingcnt [pri])
+ break;
+
+ if (idlecnt [pri])
+ {
+ queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
+ break;
+ }
+ }
+ }
+}
+#endif
+
+void inline_speed
+time_update (EV_P_ ev_tstamp max_block)
+{
+ int i;
+
+#if EV_USE_MONOTONIC
+ if (expect_true (have_monotonic))
+ {
+ ev_tstamp odiff = rtmn_diff;
+
+ mn_now = get_clock ();
+
+ /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
+ /* interpolate in the meantime */
+ if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
+ {
+ ev_rt_now = rtmn_diff + mn_now;
+ return;
+ }
+
+ now_floor = mn_now;
+ ev_rt_now = ev_time ();
+
+ /* loop a few times, before making important decisions.
+ * on the choice of "4": one iteration isn't enough,
+ * in case we get preempted during the calls to
+ * ev_time and get_clock. a second call is almost guaranteed
+ * to succeed in that case, though. and looping a few more times
+ * doesn't hurt either as we only do this on time-jumps or
+ * in the unlikely event of having been preempted here.
+ */
+ for (i = 4; --i; )
+ {
+ rtmn_diff = ev_rt_now - mn_now;
+
+ if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
+ return; /* all is well */
+
+ ev_rt_now = ev_time ();
+ mn_now = get_clock ();
+ now_floor = mn_now;
+ }
+
+# if EV_PERIODIC_ENABLE
+ periodics_reschedule (EV_A);
+# endif
+ /* no timer adjustment, as the monotonic clock doesn't jump */
+ /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
+ }
+ else
+#endif
+ {
+ ev_rt_now = ev_time ();
+
+ if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
+ {
+#if EV_PERIODIC_ENABLE
+ periodics_reschedule (EV_A);
+#endif
+ /* adjust timers. this is easy, as the offset is the same for all of them */
+ for (i = 0; i < timercnt; ++i)
+ ((WT)timers [i])->at += ev_rt_now - mn_now;
+ }
+
+ mn_now = ev_rt_now;
+ }
+}
+
+void
+ev_ref (EV_P)
+{
+ ++activecnt;
+}
+
+void
+ev_unref (EV_P)
+{
+ --activecnt;
+}
+
+static int loop_done;
+
+void
+ev_loop (EV_P_ int flags)
+{
+ loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
+ ? EVUNLOOP_ONE
+ : EVUNLOOP_CANCEL;
+
+ call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
+
+ do
+ {
+#ifndef _WIN32
+ if (expect_false (curpid)) /* penalise the forking check even more */
+ if (expect_false (getpid () != curpid))
+ {
+ curpid = getpid ();
+ postfork = 1;
+ }
+#endif
+
+#if EV_FORK_ENABLE
+ /* we might have forked, so queue fork handlers */
+ if (expect_false (postfork))
+ if (forkcnt)
+ {
+ queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
+ call_pending (EV_A);
+ }
+#endif
+
+ /* queue prepare watchers (and execute them) */
+ if (expect_false (preparecnt))
+ {
+ queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
+ call_pending (EV_A);
+ }
+
+ if (expect_false (!activecnt))
+ break;
+
+ /* 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 (EV_A);
+
+ /* calculate blocking time */
+ {
+ ev_tstamp waittime = 0.;
+ ev_tstamp sleeptime = 0.;
+
+ if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
+ {
+ /* update time to cancel out callback processing overhead */
+ time_update (EV_A_ 1e100);
+
+ waittime = MAX_BLOCKTIME;
+
+ if (timercnt)
+ {
+ ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
+ if (waittime > to) waittime = to;
+ }
+
+#if EV_PERIODIC_ENABLE
+ if (periodiccnt)
+ {
+ ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
+ if (waittime > to) waittime = to;
+ }
+#endif
+
+ 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_ waittime);
+
+ /* update ev_rt_now, do magic */
+ time_update (EV_A_ waittime + sleeptime);
+ }
+
+ /* queue pending timers and reschedule them */
+ timers_reify (EV_A); /* relative timers called last */
+#if EV_PERIODIC_ENABLE
+ periodics_reify (EV_A); /* absolute timers called first */
+#endif
+
+#if EV_IDLE_ENABLE
+ /* queue idle watchers unless other events are pending */
+ idle_reify (EV_A);
+#endif
+
+ /* queue check watchers, to be executed first */
+ if (expect_false (checkcnt))
+ queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
+
+ call_pending (EV_A);
+
+ }
+ while (expect_true (activecnt && !loop_done));
+
+ if (loop_done == EVUNLOOP_ONE)
+ loop_done = EVUNLOOP_CANCEL;
+}
+
+void
+ev_unloop (EV_P_ int how)
+{
+ loop_done = how;
+}
+
+/*****************************************************************************/
+
+void inline_size
+wlist_add (WL *head, WL elem)
+{
+ elem->next = *head;
+ *head = elem;
+}
+
+void inline_size
+wlist_del (WL *head, WL elem)
+{
+ while (*head)
+ {
+ if (*head == elem)
+ {
+ *head = elem->next;
+ return;
+ }
+
+ head = &(*head)->next;
+ }
+}
+
+void inline_speed
+clear_pending (EV_P_ W w)
+{
+ if (w->pending)
+ {
+ pendings [ABSPRI (w)][w->pending - 1].w = 0;
+ w->pending = 0;
+ }
+}
+
+int
+ev_clear_pending (EV_P_ void *w)
+{
+ W w_ = (W)w;
+ int pending = w_->pending;
+
+ if (expect_true (pending))
+ {
+ ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
+ w_->pending = 0;
+ p->w = 0;
+ return p->events;
+ }
+ else
+ return 0;
+}
+
+void inline_size
+pri_adjust (EV_P_ W w)
+{
+ int pri = w->priority;
+ pri = pri < EV_MINPRI ? EV_MINPRI : pri;
+ pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
+ w->priority = pri;
+}
+
+void inline_speed
+ev_start (EV_P_ W w, int active)
+{
+ pri_adjust (EV_A_ w);
+ w->active = active;
+ ev_ref (EV_A);
+}
+
+void inline_size
+ev_stop (EV_P_ W w)
+{
+ ev_unref (EV_A);
+ w->active = 0;
+}
+
+/*****************************************************************************/
+
+void noinline
+ev_io_start (EV_P_ ev_io *w)
+{
+ int fd = w->fd;
+
+ if (expect_false (ev_is_active (w)))
+ return;
+
+ assert (("ev_io_start called with negative fd", fd >= 0));
+
+ ev_start (EV_A_ (W)w, 1);
+ array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
+ wlist_add (&anfds[fd].head, (WL)w);
+
+ fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
+ w->events &= ~EV_IOFDSET;
+}
+
+void noinline
+ev_io_stop (EV_P_ ev_io *w)
+{
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!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 (&anfds[w->fd].head, (WL)w);
+ ev_stop (EV_A_ (W)w);
+
+ fd_change (EV_A_ w->fd, 1);
+}
+
+void noinline
+ev_timer_start (EV_P_ ev_timer *w)
+{
+ if (expect_false (ev_is_active (w)))
+ return;
+
+ ((WT)w)->at += mn_now;
+
+ assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
+
+ ev_start (EV_A_ (W)w, ++timercnt);
+ array_needsize (WT, timers, timermax, timercnt, EMPTY2);
+ timers [timercnt - 1] = (WT)w;
+ upheap (timers, timercnt - 1);
+
+ /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
+}
+
+void noinline
+ev_timer_stop (EV_P_ ev_timer *w)
+{
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
+
+ assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
+
+ {
+ int active = ((W)w)->active;
+
+ if (expect_true (--active < --timercnt))
+ {
+ timers [active] = timers [timercnt];
+ adjustheap (timers, timercnt, active);
+ }
+ }
+
+ ((WT)w)->at -= mn_now;
+
+ ev_stop (EV_A_ (W)w);
+}
+
+void noinline
+ev_timer_again (EV_P_ ev_timer *w)
+{
+ if (ev_is_active (w))
+ {
+ if (w->repeat)
+ {
+ ((WT)w)->at = mn_now + w->repeat;
+ adjustheap (timers, timercnt, ((W)w)->active - 1);
+ }
+ else
+ ev_timer_stop (EV_A_ w);
+ }
+ else if (w->repeat)
+ {
+ w->at = w->repeat;
+ ev_timer_start (EV_A_ w);
+ }
+}
+
+#if EV_PERIODIC_ENABLE
+void noinline
+ev_periodic_start (EV_P_ ev_periodic *w)
+{
+ if (expect_false (ev_is_active (w)))
+ return;
+
+ 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 = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
+ }
+ else
+ ((WT)w)->at = w->offset;
+
+ ev_start (EV_A_ (W)w, ++periodiccnt);
+ array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
+ periodics [periodiccnt - 1] = (WT)w;
+ upheap (periodics, periodiccnt - 1);
+
+ /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
+}
+
+void noinline
+ev_periodic_stop (EV_P_ ev_periodic *w)
+{
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
+
+ assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
+
+ {
+ int active = ((W)w)->active;
+
+ if (expect_true (--active < --periodiccnt))
+ {
+ periodics [active] = periodics [periodiccnt];
+ adjustheap (periodics, periodiccnt, active);
+ }
+ }
+
+ ev_stop (EV_A_ (W)w);
+}
+
+void noinline
+ev_periodic_again (EV_P_ ev_periodic *w)
+{
+ /* TODO: use adjustheap and recalculation */
+ ev_periodic_stop (EV_A_ w);
+ ev_periodic_start (EV_A_ w);
+}
+#endif
+
+#ifndef SA_RESTART
+# define SA_RESTART 0
+#endif
+
+void noinline
+ev_signal_start (EV_P_ ev_signal *w)
+{
+#if EV_MULTIPLICITY
+ assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
+#endif
+ if (expect_false (ev_is_active (w)))
+ return;
+
+ assert (("ev_signal_start called with illegal signal number", w->signum > 0));
+
+ {
+#ifndef _WIN32
+ sigset_t full, prev;
+ sigfillset (&full);
+ sigprocmask (SIG_SETMASK, &full, &prev);
+#endif
+
+ array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
+
+#ifndef _WIN32
+ sigprocmask (SIG_SETMASK, &prev, 0);
+#endif
+ }
+
+ ev_start (EV_A_ (W)w, 1);
+ wlist_add (&signals [w->signum - 1].head, (WL)w);
+
+ 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
}
-
- fdchangecnt = 0;
}
-static void
-call_pending (void)
+void noinline
+ev_signal_stop (EV_P_ ev_signal *w)
{
- while (pendingcnt)
- {
- ANPENDING *p = pendings + --pendingcnt;
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
- if (p->w)
- {
- p->w->pending = 0;
- p->w->cb (p->w, p->events);
- }
- }
+ wlist_del (&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
-timers_reify (void)
+void
+ev_child_start (EV_P_ ev_child *w)
{
- while (timercnt && timers [0]->at <= now)
- {
- struct ev_timer *w = timers [0];
-
- event ((W)w, EV_TIMEOUT);
+#if EV_MULTIPLICITY
+ assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
+#endif
+ if (expect_false (ev_is_active (w)))
+ return;
- /* first reschedule or stop timer */
- if (w->repeat)
- {
- w->at = now + w->repeat;
- assert (("timer timeout in the past, negative repeat?", w->at > now));
- downheap ((WT *)timers, timercnt, 0);
- }
- else
- evtimer_stop (w); /* nonrepeating: stop timer */
- }
+ ev_start (EV_A_ (W)w, 1);
+ wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
}
-static void
-periodics_reify (void)
+void
+ev_child_stop (EV_P_ ev_child *w)
{
- while (periodiccnt && periodics [0]->at <= ev_now)
- {
- struct ev_periodic *w = periodics [0];
-
- /* first reschedule or stop timer */
- 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));
- downheap ((WT *)periodics, periodiccnt, 0);
- }
- else
- evperiodic_stop (w); /* nonrepeating: stop timer */
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
- event ((W)w, EV_TIMEOUT);
- }
+ wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
+ ev_stop (EV_A_ (W)w);
}
-static void
-periodics_reschedule (ev_tstamp diff)
-{
- int i;
+#if EV_STAT_ENABLE
- /* adjust periodics after time jump */
- for (i = 0; i < periodiccnt; ++i)
- {
- struct ev_periodic *w = periodics [i];
+# ifdef _WIN32
+# undef lstat
+# define lstat(a,b) _stati64 (a,b)
+# endif
- if (w->interval)
- {
- ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
+#define DEF_STAT_INTERVAL 5.0074891
+#define MIN_STAT_INTERVAL 0.1074891
- if (fabs (diff) >= 1e-4)
- {
- evperiodic_stop (w);
- evperiodic_start (w);
+static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
- i = 0; /* restart loop, inefficient, but time jumps should be rare */
- }
- }
- }
-}
+#if EV_USE_INOTIFY
+# define EV_INOTIFY_BUFSIZE 8192
-static void
-time_update (void)
+static void noinline
+infy_add (EV_P_ ev_stat *w)
{
- int i;
+ w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
- ev_now = ev_time ();
-
- if (have_monotonic)
+ if (w->wd < 0)
{
- ev_tstamp odiff = diff;
+ ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
- for (i = 4; --i; ) /* loop a few times, before making important decisions */
+ /* monitor some parent directory for speedup hints */
+ if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
{
- now = get_clock ();
- diff = ev_now - now;
+ char path [4096];
+ strcpy (path, w->path);
- if (fabs (odiff - diff) < MIN_TIMEJUMP)
- return; /* all is well */
+ do
+ {
+ int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
+ | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
- ev_now = ev_time ();
- }
+ char *pend = strrchr (path, '/');
- periodics_reschedule (diff - odiff);
- /* no timer adjustment, as the monotonic clock doesn't jump */
- }
- else
- {
- if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
- {
- periodics_reschedule (ev_now - now);
+ if (!pend)
+ break; /* whoops, no '/', complain to your admin */
- /* adjust timers. this is easy, as the offset is the same for all */
- for (i = 0; i < timercnt; ++i)
- timers [i]->at += diff;
+ *pend = 0;
+ w->wd = inotify_add_watch (fs_fd, path, mask);
+ }
+ while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
}
-
- now = ev_now;
}
-}
+ else
+ ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
-int ev_loop_done;
+ if (w->wd >= 0)
+ wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
+}
-void ev_loop (int flags)
+static void noinline
+infy_del (EV_P_ ev_stat *w)
{
- double block;
- ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
+ int slot;
+ int wd = w->wd;
- do
- {
- /* queue check watchers (and execute them) */
- if (preparecnt)
- {
- queue_events ((W *)prepares, preparecnt, EV_PREPARE);
- call_pending ();
- }
+ if (wd < 0)
+ return;
- /* update fd-related kernel structures */
- fd_reify ();
+ w->wd = -2;
+ slot = wd & (EV_INOTIFY_HASHSIZE - 1);
+ wlist_del (&fs_hash [slot].head, (WL)w);
- /* calculate blocking time */
+ /* remove this watcher, if others are watching it, they will rearm */
+ inotify_rm_watch (fs_fd, wd);
+}
- /* we only need this for !monotonic clockor timers, but as we basically
- always have timers, we just calculate it always */
- ev_now = ev_time ();
+static void noinline
+infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
+{
+ if (slot < 0)
+ /* overflow, need to check for all hahs slots */
+ for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
+ infy_wd (EV_A_ slot, wd, ev);
+ else
+ {
+ WL w_;
- if (flags & EVLOOP_NONBLOCK || idlecnt)
- block = 0.;
- else
+ for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
{
- block = MAX_BLOCKTIME;
+ ev_stat *w = (ev_stat *)w_;
+ w_ = w_->next; /* lets us remove this watcher and all before it */
- if (timercnt)
+ if (w->wd == wd || wd == -1)
{
- ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
- if (block > to) block = to;
- }
+ if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
+ {
+ w->wd = -1;
+ infy_add (EV_A_ w); /* re-add, no matter what */
+ }
- if (periodiccnt)
- {
- ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
- if (block > to) block = to;
+ stat_timer_cb (EV_A_ &w->timer, 0);
}
-
- if (block < 0.) block = 0.;
}
+ }
+}
- method_poll (block);
-
- /* update ev_now, do magic */
- time_update ();
+static void
+infy_cb (EV_P_ ev_io *w, int revents)
+{
+ char buf [EV_INOTIFY_BUFSIZE];
+ struct inotify_event *ev = (struct inotify_event *)buf;
+ int ofs;
+ int len = read (fs_fd, buf, sizeof (buf));
- /* queue pending timers and reschedule them */
- timers_reify (); /* relative timers called last */
- periodics_reify (); /* absolute timers called first */
+ for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
+ infy_wd (EV_A_ ev->wd, ev->wd, ev);
+}
- /* queue idle watchers unless io or timers are pending */
- if (!pendingcnt)
- queue_events ((W *)idles, idlecnt, EV_IDLE);
+void inline_size
+infy_init (EV_P)
+{
+ if (fs_fd != -2)
+ return;
- /* queue check watchers, to be executed first */
- if (checkcnt)
- queue_events ((W *)checks, checkcnt, EV_CHECK);
+ fs_fd = inotify_init ();
- call_pending ();
+ if (fs_fd >= 0)
+ {
+ ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
+ ev_set_priority (&fs_w, EV_MAXPRI);
+ ev_io_start (EV_A_ &fs_w);
}
- while (!ev_loop_done);
-
- if (ev_loop_done != 2)
- ev_loop_done = 0;
}
-/*****************************************************************************/
-
-static void
-wlist_add (WL *head, WL elem)
+void inline_size
+infy_fork (EV_P)
{
- elem->next = *head;
- *head = elem;
-}
+ int slot;
-static void
-wlist_del (WL *head, WL elem)
-{
- while (*head)
+ if (fs_fd < 0)
+ return;
+
+ close (fs_fd);
+ fs_fd = inotify_init ();
+
+ for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
{
- if (*head == elem)
+ WL w_ = fs_hash [slot].head;
+ fs_hash [slot].head = 0;
+
+ while (w_)
{
- *head = elem->next;
- return;
+ ev_stat *w = (ev_stat *)w_;
+ w_ = w_->next; /* lets us add this watcher */
+
+ w->wd = -1;
+
+ if (fs_fd >= 0)
+ infy_add (EV_A_ w); /* re-add, no matter what */
+ else
+ ev_timer_start (EV_A_ &w->timer);
}
- head = &(*head)->next;
}
}
-static void
-ev_clear (W w)
-{
- if (w->pending)
- {
- pendings [w->pending - 1].w = 0;
- w->pending = 0;
- }
-}
+#endif
-static void
-ev_start (W w, int active)
+void
+ev_stat_stat (EV_P_ ev_stat *w)
{
- w->active = active;
+ if (lstat (w->path, &w->attr) < 0)
+ w->attr.st_nlink = 0;
+ else if (!w->attr.st_nlink)
+ w->attr.st_nlink = 1;
}
-static void
-ev_stop (W w)
+static void noinline
+stat_timer_cb (EV_P_ ev_timer *w_, int revents)
{
- w->active = 0;
+ ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
+
+ /* we copy this here each the time so that */
+ /* prev has the old value when the callback gets invoked */
+ w->prev = w->attr;
+ ev_stat_stat (EV_A_ w);
+
+ /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
+ if (
+ w->prev.st_dev != w->attr.st_dev
+ || w->prev.st_ino != w->attr.st_ino
+ || w->prev.st_mode != w->attr.st_mode
+ || w->prev.st_nlink != w->attr.st_nlink
+ || w->prev.st_uid != w->attr.st_uid
+ || w->prev.st_gid != w->attr.st_gid
+ || w->prev.st_rdev != w->attr.st_rdev
+ || w->prev.st_size != w->attr.st_size
+ || w->prev.st_atime != w->attr.st_atime
+ || w->prev.st_mtime != w->attr.st_mtime
+ || w->prev.st_ctime != w->attr.st_ctime
+ ) {
+ #if EV_USE_INOTIFY
+ infy_del (EV_A_ w);
+ infy_add (EV_A_ w);
+ ev_stat_stat (EV_A_ w); /* avoid race... */
+ #endif
+
+ ev_feed_event (EV_A_ w, EV_STAT);
+ }
}
-/*****************************************************************************/
-
void
-evio_start (struct ev_io *w)
+ev_stat_start (EV_P_ ev_stat *w)
{
- if (ev_is_active (w))
+ if (expect_false (ev_is_active (w)))
return;
- int fd = w->fd;
+ /* since we use memcmp, we need to clear any padding data etc. */
+ memset (&w->prev, 0, sizeof (ev_statdata));
+ memset (&w->attr, 0, sizeof (ev_statdata));
- ev_start ((W)w, 1);
- array_needsize (anfds, anfdmax, fd + 1, anfds_init);
- wlist_add ((WL *)&anfds[fd].head, (WL)w);
+ ev_stat_stat (EV_A_ w);
- ++fdchangecnt;
- array_needsize (fdchanges, fdchangemax, fdchangecnt, );
- fdchanges [fdchangecnt - 1] = fd;
+ if (w->interval < MIN_STAT_INTERVAL)
+ w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
- if (w->fd == 9)
- printf ("start %p:%x\n", w, w->events);//D
+ ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
+ ev_set_priority (&w->timer, ev_priority (w));
+
+#if EV_USE_INOTIFY
+ infy_init (EV_A);
+
+ if (fs_fd >= 0)
+ infy_add (EV_A_ w);
+ else
+#endif
+ ev_timer_start (EV_A_ &w->timer);
+
+ ev_start (EV_A_ (W)w, 1);
}
void
-evio_stop (struct ev_io *w)
+ev_stat_stop (EV_P_ ev_stat *w)
{
- if (w->fd == 9)
- printf ("stop %p:%x\n", w, w->events);//D
- ev_clear ((W)w);
- if (!ev_is_active (w))
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
- ev_stop ((W)w);
+#if EV_USE_INOTIFY
+ infy_del (EV_A_ w);
+#endif
+ ev_timer_stop (EV_A_ &w->timer);
- ++fdchangecnt;
- array_needsize (fdchanges, fdchangemax, fdchangecnt, );
- fdchanges [fdchangecnt - 1] = w->fd;
+ ev_stop (EV_A_ (W)w);
}
+#endif
+#if EV_IDLE_ENABLE
void
-evtimer_start (struct ev_timer *w)
+ev_idle_start (EV_P_ ev_idle *w)
{
- if (ev_is_active (w))
+ if (expect_false (ev_is_active (w)))
return;
- w->at += now;
+ pri_adjust (EV_A_ (W)w);
- assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
+ {
+ int active = ++idlecnt [ABSPRI (w)];
- ev_start ((W)w, ++timercnt);
- array_needsize (timers, timermax, timercnt, );
- timers [timercnt - 1] = w;
- upheap ((WT *)timers, timercnt - 1);
+ ++idleall;
+ ev_start (EV_A_ (W)w, active);
+
+ array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
+ idles [ABSPRI (w)][active - 1] = w;
+ }
}
void
-evtimer_stop (struct ev_timer *w)
+ev_idle_stop (EV_P_ ev_idle *w)
{
- ev_clear ((W)w);
- if (!ev_is_active (w))
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- if (w->active < timercnt--)
- {
- timers [w->active - 1] = timers [timercnt];
- downheap ((WT *)timers, timercnt, w->active - 1);
- }
-
- w->at = w->repeat;
+ {
+ int active = ((W)w)->active;
- ev_stop ((W)w);
-}
+ idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
+ ((W)idles [ABSPRI (w)][active - 1])->active = active;
-void
-evtimer_again (struct ev_timer *w)
-{
- if (ev_is_active (w))
- {
- if (w->repeat)
- {
- w->at = now + w->repeat;
- downheap ((WT *)timers, timercnt, w->active - 1);
- }
- else
- evtimer_stop (w);
- }
- else if (w->repeat)
- evtimer_start (w);
+ ev_stop (EV_A_ (W)w);
+ --idleall;
+ }
}
+#endif
void
-evperiodic_start (struct ev_periodic *w)
+ev_prepare_start (EV_P_ ev_prepare *w)
{
- if (ev_is_active (w))
+ if (expect_false (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;
-
- ev_start ((W)w, ++periodiccnt);
- array_needsize (periodics, periodicmax, periodiccnt, );
- periodics [periodiccnt - 1] = w;
- upheap ((WT *)periodics, periodiccnt - 1);
+ ev_start (EV_A_ (W)w, ++preparecnt);
+ array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
+ prepares [preparecnt - 1] = w;
}
void
-evperiodic_stop (struct ev_periodic *w)
+ev_prepare_stop (EV_P_ ev_prepare *w)
{
- ev_clear ((W)w);
- if (!ev_is_active (w))
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- if (w->active < periodiccnt--)
- {
- periodics [w->active - 1] = periodics [periodiccnt];
- downheap ((WT *)periodics, periodiccnt, w->active - 1);
- }
+ {
+ int active = ((W)w)->active;
+ prepares [active - 1] = prepares [--preparecnt];
+ ((W)prepares [active - 1])->active = active;
+ }
- ev_stop ((W)w);
+ ev_stop (EV_A_ (W)w);
}
void
-evsignal_start (struct ev_signal *w)
+ev_check_start (EV_P_ ev_check *w)
{
- if (ev_is_active (w))
+ if (expect_false (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, ++checkcnt);
+ array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
+ checks [checkcnt - 1] = w;
}
void
-evsignal_stop (struct ev_signal *w)
+ev_check_stop (EV_P_ ev_check *w)
{
- ev_clear ((W)w);
- if (!ev_is_active (w))
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
- ev_stop ((W)w);
+ {
+ int active = ((W)w)->active;
+ checks [active - 1] = checks [--checkcnt];
+ ((W)checks [active - 1])->active = active;
+ }
- if (!signals [w->signum - 1].head)
- signal (w->signum, SIG_DFL);
+ ev_stop (EV_A_ (W)w);
}
-void evidle_start (struct ev_idle *w)
+#if EV_EMBED_ENABLE
+void noinline
+ev_embed_sweep (EV_P_ ev_embed *w)
{
- if (ev_is_active (w))
- return;
-
- ev_start ((W)w, ++idlecnt);
- array_needsize (idles, idlemax, idlecnt, );
- idles [idlecnt - 1] = w;
+ ev_loop (w->other, EVLOOP_NONBLOCK);
}
-void evidle_stop (struct ev_idle *w)
+static void
+embed_io_cb (EV_P_ ev_io *io, int revents)
{
- ev_clear ((W)w);
- if (ev_is_active (w))
- return;
+ ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
- idles [w->active - 1] = idles [--idlecnt];
- ev_stop ((W)w);
+ if (ev_cb (w))
+ ev_feed_event (EV_A_ (W)w, EV_EMBED);
+ else
+ ev_loop (w->other, EVLOOP_NONBLOCK);
}
-void evprepare_start (struct ev_prepare *w)
+static void
+embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
{
- if (ev_is_active (w))
- return;
+ ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
- ev_start ((W)w, ++preparecnt);
- array_needsize (prepares, preparemax, preparecnt, );
- prepares [preparecnt - 1] = w;
+ {
+ struct ev_loop *loop = w->other;
+
+ while (fdchangecnt)
+ {
+ fd_reify (EV_A);
+ ev_loop (EV_A_ EVLOOP_NONBLOCK);
+ }
+ }
}
-void evprepare_stop (struct ev_prepare *w)
+#if 0
+static void
+embed_idle_cb (EV_P_ ev_idle *idle, int revents)
{
- ev_clear ((W)w);
- if (ev_is_active (w))
- return;
-
- prepares [w->active - 1] = prepares [--preparecnt];
- ev_stop ((W)w);
+ ev_idle_stop (EV_A_ idle);
}
+#endif
-void evcheck_start (struct ev_check *w)
+void
+ev_embed_start (EV_P_ ev_embed *w)
{
- if (ev_is_active (w))
+ if (expect_false (ev_is_active (w)))
return;
- ev_start ((W)w, ++checkcnt);
- array_needsize (checks, checkmax, checkcnt, );
- checks [checkcnt - 1] = w;
+ {
+ struct ev_loop *loop = w->other;
+ assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
+ 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);
}
-void evcheck_stop (struct ev_check *w)
+void
+ev_embed_stop (EV_P_ ev_embed *w)
{
- ev_clear ((W)w);
- if (ev_is_active (w))
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- checks [w->active - 1] = checks [--checkcnt];
- ev_stop ((W)w);
+ ev_io_stop (EV_A_ &w->io);
+ ev_prepare_stop (EV_A_ &w->prepare);
+
+ ev_stop (EV_A_ (W)w);
}
+#endif
-void evchild_start (struct ev_child *w)
+#if EV_FORK_ENABLE
+void
+ev_fork_start (EV_P_ ev_fork *w)
{
- if (ev_is_active (w))
+ if (expect_false (ev_is_active (w)))
return;
- ev_start ((W)w, 1);
- wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
+ ev_start (EV_A_ (W)w, ++forkcnt);
+ array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
+ forks [forkcnt - 1] = w;
}
-void evchild_stop (struct ev_child *w)
+void
+ev_fork_stop (EV_P_ ev_fork *w)
{
- ev_clear ((W)w);
- if (ev_is_active (w))
+ clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
- ev_stop ((W)w);
+ {
+ int active = ((W)w)->active;
+ forks [active - 1] = forks [--forkcnt];
+ ((W)forks [active - 1])->active = active;
+ }
+
+ ev_stop (EV_A_ (W)w);
}
+#endif
/*****************************************************************************/
struct ev_once
{
- struct ev_io io;
- struct ev_timer to;
+ ev_io io;
+ ev_timer to;
void (*cb)(int revents, void *arg);
void *arg;
};
static void
-once_cb (struct ev_once *once, int revents)
+once_cb (EV_P_ struct ev_once *once, int revents)
{
void (*cb)(int revents, void *arg) = once->cb;
void *arg = once->arg;
- evio_stop (&once->io);
- evtimer_stop (&once->to);
- free (once);
+ ev_io_stop (EV_A_ &once->io);
+ ev_timer_stop (EV_A_ &once->to);
+ ev_free (once);
cb (revents, arg);
}
static void
-once_cb_io (struct ev_io *w, int revents)
+once_cb_io (EV_P_ ev_io *w, int revents)
{
- once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
+ once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
}
static void
-once_cb_to (struct ev_timer *w, int revents)
+once_cb_to (EV_P_ ev_timer *w, int revents)
{
- once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
+ once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
}
void
-ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
+ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
{
- struct ev_once *once = malloc (sizeof (struct ev_once));
+ struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
- if (!once)
- cb (EV_ERROR, arg);
- else
+ if (expect_false (!once))
{
- once->cb = cb;
- once->arg = arg;
-
- evw_init (&once->io, once_cb_io);
-
- if (fd >= 0)
- {
- evio_set (&once->io, fd, events);
- evio_start (&once->io);
- }
-
- evw_init (&once->to, once_cb_to);
-
- if (timeout >= 0.)
- {
- evtimer_set (&once->to, timeout, 0.);
- evtimer_start (&once->to);
- }
+ cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
+ return;
}
-}
-
-/*****************************************************************************/
-
-#if 0
-
-struct ev_io wio;
-
-static void
-sin_cb (struct ev_io *w, int revents)
-{
- fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
-}
-
-static void
-ocb (struct ev_timer *w, int revents)
-{
- //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);
-}
-
-static void
-scb (struct ev_signal *w, int revents)
-{
- fprintf (stderr, "signal %x,%d\n", revents, w->signum);
- evio_stop (&wio);
- evio_start (&wio);
-}
-
-static void
-gcb (struct ev_signal *w, int revents)
-{
- fprintf (stderr, "generic %x\n", revents);
-
-}
-
-int main (void)
-{
- ev_init (0);
- evio_init (&wio, sin_cb, 0, EV_READ);
- evio_start (&wio);
+ once->cb = cb;
+ once->arg = arg;
- struct ev_timer t[10000];
-
-#if 0
- int i;
- for (i = 0; i < 10000; ++i)
+ ev_init (&once->io, once_cb_io);
+ if (fd >= 0)
{
- 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);
+ ev_io_set (&once->io, fd, events);
+ ev_io_start (EV_A_ &once->io);
}
-#endif
-
- struct ev_timer t1;
- evtimer_init (&t1, ocb, 5, 10);
- evtimer_start (&t1);
-
- struct ev_signal sig;
- evsignal_init (&sig, scb, SIGQUIT);
- evsignal_start (&sig);
-
- struct ev_check cw;
- evcheck_init (&cw, gcb);
- evcheck_start (&cw);
-
- struct ev_idle iw;
- evidle_init (&iw, gcb);
- evidle_start (&iw);
- ev_loop (0);
-
- 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);
+ }
}
+#if EV_MULTIPLICITY
+ #include "ev_wrap.h"
#endif
-
-
+#ifdef __cplusplus
+}
+#endif
projects / software / libev.git / blobdiff