+/*
+ * 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.
+ *
+ * * 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
+# 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_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 <fcntl.h>
+#include <stddef.h>
#include <stdio.h>
+#include <assert.h>
#include <errno.h>
-#include <sys/time.h>
+#include <sys/types.h>
#include <time.h>
-#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
-#define HAVE_EPOLL 1
-#define HAVE_REALTIME 1
-#define HAVE_SELECT 0
+/**/
-#define MAX_BLOCKTIME 60.
+#ifndef EV_USE_MONOTONIC
+# define EV_USE_MONOTONIC 0
+#endif
-#include "ev.h"
+#ifndef EV_USE_REALTIME
+# define EV_USE_REALTIME 0
+#endif
-struct ev_watcher {
- EV_WATCHER (ev_watcher);
-};
+#ifndef EV_USE_SELECT
+# define EV_USE_SELECT 1
+#endif
-struct ev_watcher_list {
- EV_WATCHER_LIST (ev_watcher_list);
-};
+#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 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_SELECT_IS_WINSOCKET
+# include <winsock.h>
+#endif
+
+#if !EV_STAT_ENABLE
+# define EV_USE_INOTIFY 0
+#endif
+
+#if EV_USE_INOTIFY
+# include <sys/inotify.h>
+#endif
+
+/**/
+
+#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
+#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 */
+
+#if __GNUC__ >= 3
+# define expect(expr,value) __builtin_expect ((expr),(value))
+# define inline_size static inline /* inline for codesize */
+# if EV_MINIMAL
+# define noinline __attribute__ ((noinline))
+# define inline_speed static noinline
+# else
+# define noinline
+# define inline_speed static inline
+# endif
+#else
+# define expect(expr,value) (expr)
+# define inline_speed static
+# define inline_size static
+# define noinline
+#endif
+
+#define expect_false(expr) expect ((expr) != 0, 0)
+#define expect_true(expr) expect ((expr) != 0, 1)
+
+#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
+#define ABSPRI(w) ((w)->priority - EV_MINPRI)
+
+#define EMPTY0 /* 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;
+
+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 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, size_t size) = realloc;
-ev_tstamp ev_now;
-int ev_method;
+void
+ev_set_allocator (void *(*cb)(void *ptr, size_t size))
+{
+ alloc = cb;
+}
+
+inline_speed void *
+ev_realloc (void *ptr, size_t size)
+{
+ ptr = alloc (ptr, size);
+
+ if (!ptr && size)
+ {
+ fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)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;
+
+typedef struct
+{
+#if EV_USE_INOTIFY
+ WL head;
+#endif
+} ANFS;
+
+#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"
+
+ static struct ev_loop default_loop_struct;
+ struct ev_loop *ev_default_loop_ptr;
+
+#else
+
+ 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;
+
+#endif
-static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
-static void (*method_reify)(void);
-static void (*method_poll)(ev_tstamp timeout);
+/*****************************************************************************/
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);
}
#endif
- return ev_time ();
+ return ev_time ();
+}
+
+#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; \
+ }
+
+#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*/\
+ }
+
+#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)
+{
+ W w_ = (W)w;
+
+ if (expect_false (w_->pending))
+ {
+ pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
+ return;
+ }
+
+ w_->pending = ++pendingcnt [ABSPRI (w_)];
+ array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
+ pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
+ pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
+}
+
+void inline_size
+queue_events (EV_P_ W *events, int eventcnt, int type)
+{
+ int i;
+
+ for (i = 0; i < eventcnt; ++i)
+ ev_feed_event (EV_A_ events [i], type);
+}
+
+/*****************************************************************************/
+
+void inline_size
+anfds_init (ANFD *base, int count)
+{
+ while (count--)
+ {
+ base->head = 0;
+ base->events = EV_NONE;
+ base->reify = 0;
+
+ ++base;
+ }
+}
+
+void inline_speed
+fd_event (EV_P_ int fd, int revents)
+{
+ ANFD *anfd = anfds + fd;
+ ev_io *w;
+
+ for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
+ {
+ int ev = w->events & revents;
+
+ if (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);
+}
+
+void inline_size
+fd_reify (EV_P)
+{
+ int i;
+
+ for (i = 0; i < fdchangecnt; ++i)
+ {
+ int fd = fdchanges [i];
+ ANFD *anfd = anfds + fd;
+ ev_io *w;
+
+ int events = 0;
+
+ for (w = (ev_io *)anfd->head; w; w = (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;
+
+ backend_modify (EV_A_ fd, anfd->events, events);
+ anfd->events = events;
+ }
+
+ fdchangecnt = 0;
+}
+
+void inline_size
+fd_change (EV_P_ int fd)
+{
+ if (expect_false (anfds [fd].reify))
+ return;
+
+ anfds [fd].reify = 1;
+
+ ++fdchangecnt;
+ array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
+ fdchanges [fdchangecnt - 1] = fd;
+}
+
+void inline_speed
+fd_kill (EV_P_ int fd)
+{
+ ev_io *w;
+
+ while ((w = (ev_io *)anfds [fd].head))
+ {
+ ev_io_stop (EV_A_ w);
+ ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
+ }
+}
+
+int inline_size
+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 noinline
+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 noinline
+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 backend needs to re-arm all fds from scratch */
+static void noinline
+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);
+ }
+}
+
+/*****************************************************************************/
+
+void inline_speed
+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;
+ }
+
+ heap [k] = w;
+ ((W)heap [k])->active = k + 1;
+
+}
+
+void inline_speed
+downheap (WT *heap, int N, int k)
+{
+ WT w = heap [k];
+
+ while (k < (N >> 1))
+ {
+ int j = k << 1;
+
+ if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
+ ++j;
+
+ if (w->at <= heap [j]->at)
+ break;
+
+ heap [k] = heap [j];
+ ((W)heap [k])->active = k + 1;
+ k = j;
+ }
+
+ 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);
+}
+
+/*****************************************************************************/
+
+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_size
+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 noinline
+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 ev_child *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_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 (EV_P_ ev_signal *sw, int revents)
+{
+ int pid, status;
+
+ /* 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 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 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 */
+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)
+{
+ return EVBACKEND_EPOLL
+ | EVBACKEND_KQUEUE
+ | EVBACKEND_PORT;
+}
+
+unsigned int
+ev_backend (EV_P)
+{
+ return backend;
+}
+
+static void noinline
+loop_init (EV_P_ unsigned int flags)
+{
+ if (!backend)
+ {
+#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 & EVFLAG_NOENV)
+ && !enable_secure ()
+ && getenv ("LIBEV_FLAGS"))
+ flags = atoi (getenv ("LIBEV_FLAGS"));
+
+ if (!(flags & 0x0000ffffUL))
+ flags |= ev_recommended_backends ();
+
+ backend = 0;
+ backend_fd = -1;
+#if EV_USE_INOTIFY
+ fs_fd = -2;
+#endif
+
+#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 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
+
+ ev_init (&sigev, sigcb);
+ ev_set_priority (&sigev, EV_MAXPRI);
+ }
+}
+
+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]);
+
+ /* have to use the microsoft-never-gets-it-right macro */
+ array_free (fdchange, EMPTY0);
+ array_free (timer, EMPTY0);
+#if EV_PERIODIC_ENABLE
+ array_free (periodic, EMPTY0);
+#endif
+ array_free (idle, EMPTY0);
+ array_free (prepare, EMPTY0);
+ array_free (check, EMPTY0);
+
+ backend = 0;
+}
+
+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_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);
+ }
+
+ 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_loop_fork (EV_P)
+{
+ postfork = 1;
+}
+
+#endif
+
+#if EV_MULTIPLICITY
+struct ev_loop *
+ev_default_loop_init (unsigned int flags)
+#else
+int
+ev_default_loop (unsigned int flags)
+#endif
+{
+ 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_default_destroy (void)
+{
+#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_default_fork (void)
+{
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = ev_default_loop_ptr;
+#endif
+
+ if (backend)
+ postfork = 1;
+}
+
+/*****************************************************************************/
+
+int inline_size
+any_pending (EV_P)
+{
+ int pri;
+
+ for (pri = NUMPRI; pri--; )
+ if (pendingcnt [pri])
+ return 1;
+
+ return 0;
+}
+
+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);
+ }
+ }
+}
+
+void inline_size
+timers_reify (EV_P)
+{
+ while (timercnt && ((WT)timers [0])->at <= mn_now)
+ {
+ ev_timer *w = timers [0];
+
+ /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
+
+ /* first reschedule or stop timer */
+ if (w->repeat)
+ {
+ 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
+ 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 = 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 + 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)
+ {
+ ((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
+ 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 = periodics [i];
+
+ 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;
+ }
+
+ /* now rebuild the heap */
+ for (i = periodiccnt >> 1; i--; )
+ downheap ((WT *)periodics, periodiccnt, i);
+}
+#endif
+
+int inline_size
+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;
+ }
+}
+
+void inline_size
+time_update (EV_P)
+{
+ int i;
+
+#if EV_USE_MONOTONIC
+ if (expect_true (have_monotonic))
+ {
+ if (time_update_monotonic (EV_A))
+ {
+ ev_tstamp odiff = rtmn_diff;
+
+ /* 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 guarenteed
+ * 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 getting 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 || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
+ {
+#if EV_PERIODIC_ENABLE
+ periodics_reschedule (EV_A);
+#endif
+
+ /* adjust timers. this is easy, as the offset is the same for all */
+ 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;
+
+ while (activecnt)
+ {
+ /* we might have forked, so reify kernel state if necessary */
+ #if EV_FORK_ENABLE
+ if (expect_false (postfork))
+ if (forkcnt)
+ {
+ queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
+ call_pending (EV_A);
+ }
+ #endif
+
+ /* 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 (EV_A);
+
+ /* calculate blocking time */
+ {
+ double block;
+
+ if (flags & EVLOOP_NONBLOCK || idlecnt)
+ block = 0.; /* do not block at all */
+ else
+ {
+ /* update time to cancel out callback processing overhead */
+#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;
+ }
+
+ block = MAX_BLOCKTIME;
+
+ if (timercnt)
+ {
+ ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
+ if (block > to) block = to;
+ }
+
+#if EV_PERIODIC_ENABLE
+ if (periodiccnt)
+ {
+ ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
+ if (block > to) block = to;
+ }
+#endif
+
+ if (expect_false (block < 0.)) block = 0.;
+ }
+
+ backend_poll (EV_A_ block);
+ }
+
+ /* update ev_rt_now, do magic */
+ time_update (EV_A);
+
+ /* 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
+
+ /* queue idle watchers unless other events are pending */
+ if (idlecnt && !any_pending (EV_A))
+ queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
+
+ /* queue check watchers, to be executed first */
+ if (expect_false (checkcnt))
+ queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
+
+ call_pending (EV_A);
+
+ if (expect_false (loop_done))
+ break;
+ }
+
+ 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
+ev_clear_pending (EV_P_ W w)
+{
+ if (w->pending)
+ {
+ pendings [ABSPRI (w)][w->pending - 1].w = 0;
+ w->pending = 0;
+ }
+}
+
+void inline_speed
+ev_start (EV_P_ W w, int active)
+{
+ 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);
+}
+
+void inline_size
+ev_stop (EV_P_ W w)
+{
+ ev_unref (EV_A);
+ w->active = 0;
}
-#define array_needsize(base,cur,cnt,init) \
- if ((cnt) > cur) \
- { \
- int newcnt = cur; \
- do \
- { \
- newcnt += (newcnt >> 1) + 16; \
- } \
- while ((cnt) > newcnt); \
- fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
- base = realloc (base, sizeof (*base) * (newcnt)); \
- init (base + cur, newcnt - cur); \
- cur = newcnt; \
- }
+/*****************************************************************************/
-typedef struct
+void
+ev_io_start (EV_P_ ev_io *w)
{
- struct ev_io *head;
- unsigned char wev, rev; /* want, received event set */
-} ANFD;
+ int fd = w->fd;
-static ANFD *anfds;
-static int anfdmax;
+ if (expect_false (ev_is_active (w)))
+ return;
-static int *fdchanges;
-static int fdchangemax, fdchangecnt;
+ assert (("ev_io_start called with negative fd", fd >= 0));
-static void
-anfds_init (ANFD *base, int count)
-{
- while (count--)
- {
- base->head = 0;
- base->wev = base->rev = EV_NONE;
- ++base;
- }
+ ev_start (EV_A_ (W)w, 1);
+ array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
+ wlist_add ((WL *)&anfds[fd].head, (WL)w);
+
+ fd_change (EV_A_ fd);
}
-typedef struct
+void
+ev_io_stop (EV_P_ ev_io *w)
{
- struct ev_watcher *w;
- int events;
-} ANPENDING;
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
-static ANPENDING *pendings;
-static int pendingmax, pendingcnt;
+ assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
-static void
-event (struct ev_watcher *w, int events)
+ wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
+ ev_stop (EV_A_ (W)w);
+
+ fd_change (EV_A_ w->fd);
+}
+
+void
+ev_timer_start (EV_P_ ev_timer *w)
{
- w->pending = ++pendingcnt;
- array_needsize (pendings, pendingmax, pendingcnt, );
- pendings [pendingcnt - 1].w = w;
- pendings [pendingcnt - 1].events = events;
+ 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 (ev_timer *, timers, timermax, timercnt, EMPTY2);
+ timers [timercnt - 1] = w;
+ upheap ((WT *)timers, timercnt - 1);
+
+ /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
}
-static void
-fd_event (int fd, int events)
+void
+ev_timer_stop (EV_P_ ev_timer *w)
{
- ANFD *anfd = anfds + fd;
- struct ev_io *w;
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
- for (w = anfd->head; w; w = w->next)
- {
- int ev = w->events & events;
+ assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
- if (ev)
- event ((struct ev_watcher *)w, ev);
- }
+ {
+ int active = ((W)w)->active;
+
+ if (expect_true (--active < --timercnt))
+ {
+ timers [active] = timers [timercnt];
+ adjustheap ((WT *)timers, timercnt, active);
+ }
+ }
+
+ ((WT)w)->at -= mn_now;
+
+ ev_stop (EV_A_ (W)w);
}
-static struct ev_timer **timers;
-static int timermax, timercnt;
+void
+ev_timer_again (EV_P_ ev_timer *w)
+{
+ if (ev_is_active (w))
+ {
+ if (w->repeat)
+ {
+ ((WT)w)->at = mn_now + w->repeat;
+ adjustheap ((WT *)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);
+ }
+}
-static void
-upheap (int k)
+#if EV_PERIODIC_ENABLE
+void
+ev_periodic_start (EV_P_ ev_periodic *w)
{
- struct ev_timer *w = timers [k];
+ if (expect_false (ev_is_active (w)))
+ return;
- while (k && timers [k >> 1]->at > w->at)
+ if (w->reschedule_cb)
+ ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
+ else if (w->interval)
{
- timers [k] = timers [k >> 1];
- timers [k]->active = k + 1;
- k >>= 1;
+ 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;
}
- timers [k] = w;
- timers [k]->active = k + 1;
+ ev_start (EV_A_ (W)w, ++periodiccnt);
+ array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
+ periodics [periodiccnt - 1] = w;
+ upheap ((WT *)periodics, periodiccnt - 1);
+ /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
}
-static void
-downheap (int k)
+void
+ev_periodic_stop (EV_P_ ev_periodic *w)
{
- struct ev_timer *w = timers [k];
-
- while (k <= (timercnt >> 1))
- {
- int j = k << 1;
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
- if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)
- ++j;
+ assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
- if (w->at <= timers [j]->at)
- break;
+ {
+ int active = ((W)w)->active;
- timers [k] = timers [j];
- timers [k]->active = k;
- k = j;
- }
+ if (expect_true (--active < --periodiccnt))
+ {
+ periodics [active] = periodics [periodiccnt];
+ adjustheap ((WT *)periodics, periodiccnt, active);
+ }
+ }
- timers [k] = w;
- timers [k]->active = k + 1;
+ ev_stop (EV_A_ (W)w);
}
-static struct ev_signal **signals;
-static int signalmax, signalcnt;
-
-static void
-signals_init (struct ev_signal **base, int count)
+void
+ev_periodic_again (EV_P_ ev_periodic *w)
{
- while (count--)
- *base++ = 0;
+ /* TODO: use adjustheap and recalculation */
+ ev_periodic_stop (EV_A_ w);
+ ev_periodic_start (EV_A_ w);
}
-
-#if HAVE_EPOLL
-# include "ev_epoll.c"
#endif
-#if HAVE_SELECT
-# include "ev_select.c"
+
+#ifndef SA_RESTART
+# define SA_RESTART 0
#endif
-int ev_init (int flags)
+void
+ev_signal_start (EV_P_ ev_signal *w)
{
-#if HAVE_MONOTONIC
- {
- struct timespec ts;
- if (!clock_gettime (CLOCK_MONOTONIC, &ts))
- have_monotonic = 1;
- }
+#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;
- ev_now = ev_time ();
+ assert (("ev_signal_start called with illegal signal number", w->signum > 0));
-#if HAVE_EPOLL
- if (epoll_init (flags))
- return ev_method;
-#endif
-#if HAVE_SELECT
- if (select_init (flags))
- return ev_method;
-#endif
+ 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);
- ev_method = EVMETHOD_NONE;
- return ev_method;
+ 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
+ }
}
-void ev_prefork (void)
+void
+ev_signal_stop (EV_P_ ev_signal *w)
{
+ ev_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 (EV_A_ (W)w);
+
+ if (!signals [w->signum - 1].head)
+ signal (w->signum, SIG_DFL);
}
-void ev_postfork_parent (void)
+void
+ev_child_start (EV_P_ ev_child *w)
{
+#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;
+
+ ev_start (EV_A_ (W)w, 1);
+ wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
}
-void ev_postfork_child (void)
+void
+ev_child_stop (EV_P_ ev_child *w)
{
-#if HAVE_EPOLL
- epoll_postfork_child ();
-#endif
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
+
+ wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
+ ev_stop (EV_A_ (W)w);
}
-static void
-call_pending ()
+#if EV_STAT_ENABLE
+
+# ifdef _WIN32
+# undef lstat
+# define lstat(a,b) _stati64 (a,b)
+# endif
+
+#define DEF_STAT_INTERVAL 5.0074891
+#define MIN_STAT_INTERVAL 0.1074891
+
+void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
+
+#if EV_USE_INOTIFY
+# define EV_INOTIFY_BUFSIZE 8192
+
+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);
- for (i = 0; i < pendingcnt; ++i)
+ if (w->wd < 0)
{
- ANPENDING *p = pendings + i;
+ ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
- if (p->w)
+ /* monitor some parent directory for speedup hints */
+ if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
{
- p->w->pending = 0;
- p->w->cb (p->w, p->events);
+ char path [4096];
+ strcpy (path, w->path);
+
+ do
+ {
+ int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
+ | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
+
+ char *pend = strrchr (path, '/');
+
+ if (!pend)
+ break; /* whoops, no '/', complain to your admin */
+
+ *pend = 0;
+ w->wd = inotify_add_watch (fs_fd, path, mask);
+ }
+ while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
}
}
+ else
+ ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
- pendingcnt = 0;
+ if (w->wd >= 0)
+ wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
}
-static void
-timer_reify (void)
+static void noinline
+infy_del (EV_P_ ev_stat *w)
+{
+ int slot;
+ int wd = w->wd;
+
+ if (wd < 0)
+ return;
+
+ w->wd = -2;
+ slot = wd & (EV_INOTIFY_HASHSIZE - 1);
+ wlist_del (&fs_hash [slot].head, (WL)w);
+
+ /* remove this watcher, if others are watching it, they will rearm */
+ inotify_rm_watch (fs_fd, wd);
+}
+
+static void noinline
+infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
{
- while (timercnt && timers [0]->at <= ev_now)
+ 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
{
- struct ev_timer *w = timers [0];
+ WL w_;
- /* first reschedule timer */
- if (w->repeat)
+ for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
{
- fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D
- if (w->is_abs)
- w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
- else
- w->at = ev_now + w->repeat;
+ ev_stat *w = (ev_stat *)w_;
+ w_ = w_->next; /* lets us remove this watcher and all before it */
+
+ if (w->wd == wd || wd == -1)
+ {
+ if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
+ {
+ w->wd = -1;
+ infy_add (EV_A_ w); /* re-add, no matter what */
+ }
+
+ stat_timer_cb (EV_A_ &w->timer, 0);
+ }
+ }
+ }
+}
- fprintf (stderr, "b %f\n", w->at);//D
+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));
- downheap (0);
- }
- else
- evtimer_stop (w); /* nonrepeating: stop timer */
+ for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
+ infy_wd (EV_A_ ev->wd, ev->wd, ev);
+}
+
+void inline_size
+infy_init (EV_P)
+{
+ if (fs_fd != -2)
+ return;
+
+ fs_fd = inotify_init ();
- event ((struct ev_watcher *)w, EV_TIMEOUT);
+ 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);
}
}
-int ev_loop_done;
+#endif
+
+void
+ev_stat_stat (EV_P_ ev_stat *w)
+{
+ if (lstat (w->path, &w->attr) < 0)
+ w->attr.st_nlink = 0;
+ else if (!w->attr.st_nlink)
+ w->attr.st_nlink = 1;
+}
-int ev_loop (int flags)
+void noinline
+stat_timer_cb (EV_P_ ev_timer *w_, int revents)
{
- double block;
- ev_loop_done = flags & EVLOOP_ONESHOT;
+ ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
- do
+ /* 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);
+
+ if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
{
- /* update fd-related kernel structures */
- method_reify (); fdchangecnt = 0;
+ #if EV_USE_INOTIFY
+ infy_del (EV_A_ w);
+ infy_add (EV_A_ w);
+ ev_stat_stat (EV_A_ w); /* avoid race... */
+ #endif
- /* calculate blocking time */
- ev_now = ev_time ();
+ ev_feed_event (EV_A_ w, EV_STAT);
+ }
+}
- if (flags & EVLOOP_NONBLOCK)
- block = 0.;
- else if (!timercnt)
- block = MAX_BLOCKTIME;
- else
- {
- block = timers [0]->at - ev_now + method_fudge;
- if (block < 0.) block = 0.;
- else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
- }
+void
+ev_stat_start (EV_P_ ev_stat *w)
+{
+ if (expect_false (ev_is_active (w)))
+ return;
- fprintf (stderr, "block %f\n", block);//D
- method_poll (block);
+ /* 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));
- /* put pending timers into pendign queue and reschedule them */
- timer_reify ();
+ ev_stat_stat (EV_A_ w);
- ev_now = ev_time ();
- call_pending ();
- }
- while (!ev_loop_done);
+ if (w->interval < MIN_STAT_INTERVAL)
+ w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
+
+ 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);
}
-static void
-wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)
+void
+ev_stat_stop (EV_P_ ev_stat *w)
{
- elem->next = *head;
- *head = elem;
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
+
+#if EV_USE_INOTIFY
+ infy_del (EV_A_ w);
+#endif
+ ev_timer_stop (EV_A_ &w->timer);
+
+ ev_stop (EV_A_ (W)w);
}
+#endif
-static void
-wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)
+void
+ev_idle_start (EV_P_ ev_idle *w)
{
- while (*head)
- {
- if (*head == elem)
- {
- *head = elem->next;
- return;
- }
+ if (expect_false (ev_is_active (w)))
+ return;
- head = &(*head)->next;
- }
+ ev_start (EV_A_ (W)w, ++idlecnt);
+ array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
+ idles [idlecnt - 1] = w;
}
-static void
-ev_start (struct ev_watcher *w, int active)
+void
+ev_idle_stop (EV_P_ ev_idle *w)
{
- w->pending = 0;
- w->active = active;
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
+ return;
+
+ {
+ int active = ((W)w)->active;
+ idles [active - 1] = idles [--idlecnt];
+ ((W)idles [active - 1])->active = active;
+ }
+
+ ev_stop (EV_A_ (W)w);
}
-static void
-ev_stop (struct ev_watcher *w)
+void
+ev_prepare_start (EV_P_ ev_prepare *w)
{
- if (w->pending)
- pendings [w->pending - 1].w = 0;
+ if (expect_false (ev_is_active (w)))
+ return;
- w->active = 0;
- /* nop */
+ ev_start (EV_A_ (W)w, ++preparecnt);
+ array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
+ prepares [preparecnt - 1] = w;
}
void
-evio_start (struct ev_io *w)
+ev_prepare_stop (EV_P_ ev_prepare *w)
{
- if (ev_is_active (w))
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- int fd = w->fd;
+ {
+ int active = ((W)w)->active;
+ prepares [active - 1] = prepares [--preparecnt];
+ ((W)prepares [active - 1])->active = active;
+ }
- ev_start ((struct ev_watcher *)w, 1);
- array_needsize (anfds, anfdmax, fd + 1, anfds_init);
- wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
+ ev_stop (EV_A_ (W)w);
+}
- ++fdchangecnt;
- array_needsize (fdchanges, fdchangemax, fdchangecnt, );
- fdchanges [fdchangecnt - 1] = fd;
+void
+ev_check_start (EV_P_ ev_check *w)
+{
+ if (expect_false (ev_is_active (w)))
+ return;
+
+ ev_start (EV_A_ (W)w, ++checkcnt);
+ array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
+ checks [checkcnt - 1] = w;
}
void
-evio_stop (struct ev_io *w)
+ev_check_stop (EV_P_ ev_check *w)
{
- if (!ev_is_active (w))
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
- ev_stop ((struct ev_watcher *)w);
+ {
+ int active = ((W)w)->active;
+ checks [active - 1] = checks [--checkcnt];
+ ((W)checks [active - 1])->active = active;
+ }
+
+ ev_stop (EV_A_ (W)w);
+}
- ++fdchangecnt;
- array_needsize (fdchanges, fdchangemax, fdchangecnt, );
- fdchanges [fdchangecnt - 1] = w->fd;
+#if EV_EMBED_ENABLE
+void noinline
+ev_embed_sweep (EV_P_ ev_embed *w)
+{
+ ev_loop (w->loop, EVLOOP_NONBLOCK);
+}
+
+static void
+embed_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);
}
void
-evtimer_start (struct ev_timer *w)
+ev_embed_start (EV_P_ ev_embed *w)
{
- if (ev_is_active (w))
+ if (expect_false (ev_is_active (w)))
return;
- fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
- if (w->is_abs)
- {
- if (w->repeat)
- w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
- }
- else
- w->at += ev_now;
- fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
+ {
+ struct ev_loop *loop = w->loop;
+ assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
+ ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
+ }
- ev_start ((struct ev_watcher *)w, ++timercnt);
- array_needsize (timers, timermax, timercnt, );
- timers [timercnt - 1] = w;
- upheap (timercnt - 1);
+ ev_set_priority (&w->io, ev_priority (w));
+ ev_io_start (EV_A_ &w->io);
+
+ ev_start (EV_A_ (W)w, 1);
}
void
-evtimer_stop (struct ev_timer *w)
+ev_embed_stop (EV_P_ ev_embed *w)
{
- if (!ev_is_active (w))
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- timers [w->active - 1] = timers [--timercnt];
- downheap (w->active - 1);
- ev_stop ((struct ev_watcher *)w);
+ ev_io_stop (EV_A_ &w->io);
+
+ ev_stop (EV_A_ (W)w);
}
+#endif
+#if EV_FORK_ENABLE
void
-evsignal_start (struct ev_signal *w)
+ev_fork_start (EV_P_ ev_fork *w)
{
- if (ev_is_active (w))
+ if (expect_false (ev_is_active (w)))
return;
- ev_start ((struct ev_watcher *)w, 1);
- array_needsize (signals, signalmax, w->signum, signals_init);
- wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
+ ev_start (EV_A_ (W)w, ++forkcnt);
+ array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
+ forks [forkcnt - 1] = w;
}
void
-evsignal_stop (struct ev_signal *w)
+ev_fork_stop (EV_P_ ev_fork *w)
{
- if (!ev_is_active (w))
+ ev_clear_pending (EV_A_ (W)w);
+ if (expect_false (!ev_is_active (w)))
return;
- wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
- ev_stop ((struct ev_watcher *)w);
+ {
+ int active = ((W)w)->active;
+ forks [active - 1] = forks [--forkcnt];
+ ((W)forks [active - 1])->active = active;
+ }
+
+ ev_stop (EV_A_ (W)w);
}
+#endif
/*****************************************************************************/
-#if 1
+
+struct ev_once
+{
+ ev_io io;
+ ev_timer to;
+ void (*cb)(int revents, void *arg);
+ void *arg;
+};
static void
-sin_cb (struct ev_io *w, int revents)
+once_cb (EV_P_ struct ev_once *once, int revents)
{
- fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
+ void (*cb)(int revents, void *arg) = once->cb;
+ void *arg = once->arg;
+
+ ev_io_stop (EV_A_ &once->io);
+ ev_timer_stop (EV_A_ &once->to);
+ ev_free (once);
+
+ cb (revents, arg);
}
static void
-ocb (struct ev_timer *w, int revents)
+once_cb_io (EV_P_ ev_io *w, int revents)
{
- fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
+ once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
}
-int main (void)
+static void
+once_cb_to (EV_P_ ev_timer *w, int revents)
{
- struct ev_io sin;
-
- ev_init (0);
+ once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
+}
- evw_init (&sin, sin_cb, 55);
- evio_set (&sin, 0, EV_READ);
- evio_start (&sin);
+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_timer t1;
- evw_init (&t1, ocb, 1);
- evtimer_set_rel (&t1, 1, 0);
- evtimer_start (&t1);
+ if (expect_false (!once))
+ {
+ cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
+ return;
+ }
- struct ev_timer t2;
- evw_init (&t2, ocb, 2);
- evtimer_set_abs (&t2, ev_time () + 2, 0);
- evtimer_start (&t2);
+ 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
-
-
-
projects / software / libev.git / blobdiff