1 |
/* |
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* libev event processing core, watcher management |
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* |
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* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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#ifndef EV_STANDALONE |
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# ifdef EV_CONFIG_H |
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# include EV_CONFIG_H |
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# else |
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# include "config.h" |
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# endif |
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|
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# if HAVE_CLOCK_GETTIME |
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# ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 1 |
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# endif |
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# ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 1 |
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# endif |
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# else |
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# ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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# endif |
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# ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_SELECT |
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# if HAVE_SELECT && HAVE_SYS_SELECT_H |
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# define EV_USE_SELECT 1 |
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# else |
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# define EV_USE_SELECT 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_POLL |
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# if HAVE_POLL && HAVE_POLL_H |
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# define EV_USE_POLL 1 |
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# else |
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# define EV_USE_POLL 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_EPOLL |
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# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H |
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# define EV_USE_EPOLL 1 |
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# else |
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# define EV_USE_EPOLL 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_KQUEUE |
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# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H |
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# define EV_USE_KQUEUE 1 |
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# else |
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# define EV_USE_KQUEUE 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_PORT |
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# if HAVE_PORT_H && HAVE_PORT_CREATE |
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# define EV_USE_PORT 1 |
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# else |
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# define EV_USE_PORT 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_INOTIFY |
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# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H |
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# define EV_USE_INOTIFY 1 |
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# else |
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# define EV_USE_INOTIFY 0 |
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# endif |
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# endif |
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|
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#endif |
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|
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#include <math.h> |
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#include <stdlib.h> |
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#include <fcntl.h> |
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#include <stddef.h> |
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|
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#include <stdio.h> |
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|
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#include <assert.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <time.h> |
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|
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#include <signal.h> |
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|
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#ifdef EV_H |
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# include EV_H |
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#else |
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# include "ev.h" |
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#endif |
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|
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#ifndef _WIN32 |
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# include <sys/time.h> |
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# include <sys/wait.h> |
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# include <unistd.h> |
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#else |
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# define WIN32_LEAN_AND_MEAN |
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# include <windows.h> |
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# ifndef EV_SELECT_IS_WINSOCKET |
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# define EV_SELECT_IS_WINSOCKET 1 |
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# endif |
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#endif |
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|
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/**/ |
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|
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#ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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#endif |
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|
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#ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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|
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#ifndef EV_USE_SELECT |
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# define EV_USE_SELECT 1 |
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#endif |
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|
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#ifndef EV_USE_POLL |
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# ifdef _WIN32 |
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# define EV_USE_POLL 0 |
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# else |
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# define EV_USE_POLL 1 |
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# endif |
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#endif |
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|
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#ifndef EV_USE_EPOLL |
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# define EV_USE_EPOLL 0 |
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#endif |
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|
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#ifndef EV_USE_KQUEUE |
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# define EV_USE_KQUEUE 0 |
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#endif |
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|
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#ifndef EV_USE_PORT |
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# define EV_USE_PORT 0 |
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#endif |
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|
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#ifndef EV_USE_INOTIFY |
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# define EV_USE_INOTIFY 0 |
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#endif |
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|
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#ifndef EV_PID_HASHSIZE |
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# if EV_MINIMAL |
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# define EV_PID_HASHSIZE 1 |
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# else |
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# define EV_PID_HASHSIZE 16 |
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# endif |
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#endif |
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|
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#ifndef EV_INOTIFY_HASHSIZE |
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# if EV_MINIMAL |
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# define EV_INOTIFY_HASHSIZE 1 |
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# else |
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# define EV_INOTIFY_HASHSIZE 16 |
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# endif |
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#endif |
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|
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/**/ |
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|
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#ifndef CLOCK_MONOTONIC |
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# undef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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#endif |
201 |
|
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#ifndef CLOCK_REALTIME |
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# undef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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|
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#if EV_SELECT_IS_WINSOCKET |
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# include <winsock.h> |
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#endif |
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|
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#if !EV_STAT_ENABLE |
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# define EV_USE_INOTIFY 0 |
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#endif |
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|
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#if EV_USE_INOTIFY |
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# include <sys/inotify.h> |
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#endif |
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|
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/**/ |
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|
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/* |
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* This is used to avoid floating point rounding problems. |
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* It is added to ev_rt_now when scheduling periodics |
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* to ensure progress, time-wise, even when rounding |
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* errors are against us. |
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* This value is good at least till the year 4000 |
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* and intervals up to 20 years. |
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* Better solutions welcome. |
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*/ |
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#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
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|
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#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
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#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
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/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ |
235 |
|
236 |
#if __GNUC__ >= 3 |
237 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
238 |
# define noinline __attribute__ ((noinline)) |
239 |
#else |
240 |
# define expect(expr,value) (expr) |
241 |
# define noinline |
242 |
# if __STDC_VERSION__ < 199901L |
243 |
# define inline |
244 |
# endif |
245 |
#endif |
246 |
|
247 |
#define expect_false(expr) expect ((expr) != 0, 0) |
248 |
#define expect_true(expr) expect ((expr) != 0, 1) |
249 |
#define inline_size static inline |
250 |
|
251 |
#if EV_MINIMAL |
252 |
# define inline_speed static noinline |
253 |
#else |
254 |
# define inline_speed static inline |
255 |
#endif |
256 |
|
257 |
#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
258 |
#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
259 |
|
260 |
#define EMPTY /* required for microsofts broken pseudo-c compiler */ |
261 |
#define EMPTY2(a,b) /* used to suppress some warnings */ |
262 |
|
263 |
typedef ev_watcher *W; |
264 |
typedef ev_watcher_list *WL; |
265 |
typedef ev_watcher_time *WT; |
266 |
|
267 |
static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
268 |
|
269 |
#ifdef _WIN32 |
270 |
# include "ev_win32.c" |
271 |
#endif |
272 |
|
273 |
/*****************************************************************************/ |
274 |
|
275 |
static void (*syserr_cb)(const char *msg); |
276 |
|
277 |
void |
278 |
ev_set_syserr_cb (void (*cb)(const char *msg)) |
279 |
{ |
280 |
syserr_cb = cb; |
281 |
} |
282 |
|
283 |
static void noinline |
284 |
syserr (const char *msg) |
285 |
{ |
286 |
if (!msg) |
287 |
msg = "(libev) system error"; |
288 |
|
289 |
if (syserr_cb) |
290 |
syserr_cb (msg); |
291 |
else |
292 |
{ |
293 |
perror (msg); |
294 |
abort (); |
295 |
} |
296 |
} |
297 |
|
298 |
static void *(*alloc)(void *ptr, long size); |
299 |
|
300 |
void |
301 |
ev_set_allocator (void *(*cb)(void *ptr, long size)) |
302 |
{ |
303 |
alloc = cb; |
304 |
} |
305 |
|
306 |
inline_speed void * |
307 |
ev_realloc (void *ptr, long size) |
308 |
{ |
309 |
ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); |
310 |
|
311 |
if (!ptr && size) |
312 |
{ |
313 |
fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
314 |
abort (); |
315 |
} |
316 |
|
317 |
return ptr; |
318 |
} |
319 |
|
320 |
#define ev_malloc(size) ev_realloc (0, (size)) |
321 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
322 |
|
323 |
/*****************************************************************************/ |
324 |
|
325 |
typedef struct |
326 |
{ |
327 |
WL head; |
328 |
unsigned char events; |
329 |
unsigned char reify; |
330 |
#if EV_SELECT_IS_WINSOCKET |
331 |
SOCKET handle; |
332 |
#endif |
333 |
} ANFD; |
334 |
|
335 |
typedef struct |
336 |
{ |
337 |
W w; |
338 |
int events; |
339 |
} ANPENDING; |
340 |
|
341 |
#if EV_USE_INOTIFY |
342 |
typedef struct |
343 |
{ |
344 |
WL head; |
345 |
} ANFS; |
346 |
#endif |
347 |
|
348 |
#if EV_MULTIPLICITY |
349 |
|
350 |
struct ev_loop |
351 |
{ |
352 |
ev_tstamp ev_rt_now; |
353 |
#define ev_rt_now ((loop)->ev_rt_now) |
354 |
#define VAR(name,decl) decl; |
355 |
#include "ev_vars.h" |
356 |
#undef VAR |
357 |
}; |
358 |
#include "ev_wrap.h" |
359 |
|
360 |
static struct ev_loop default_loop_struct; |
361 |
struct ev_loop *ev_default_loop_ptr; |
362 |
|
363 |
#else |
364 |
|
365 |
ev_tstamp ev_rt_now; |
366 |
#define VAR(name,decl) static decl; |
367 |
#include "ev_vars.h" |
368 |
#undef VAR |
369 |
|
370 |
static int ev_default_loop_ptr; |
371 |
|
372 |
#endif |
373 |
|
374 |
/*****************************************************************************/ |
375 |
|
376 |
ev_tstamp |
377 |
ev_time (void) |
378 |
{ |
379 |
#if EV_USE_REALTIME |
380 |
struct timespec ts; |
381 |
clock_gettime (CLOCK_REALTIME, &ts); |
382 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
383 |
#else |
384 |
struct timeval tv; |
385 |
gettimeofday (&tv, 0); |
386 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
387 |
#endif |
388 |
} |
389 |
|
390 |
ev_tstamp inline_size |
391 |
get_clock (void) |
392 |
{ |
393 |
#if EV_USE_MONOTONIC |
394 |
if (expect_true (have_monotonic)) |
395 |
{ |
396 |
struct timespec ts; |
397 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
398 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
399 |
} |
400 |
#endif |
401 |
|
402 |
return ev_time (); |
403 |
} |
404 |
|
405 |
#if EV_MULTIPLICITY |
406 |
ev_tstamp |
407 |
ev_now (EV_P) |
408 |
{ |
409 |
return ev_rt_now; |
410 |
} |
411 |
#endif |
412 |
|
413 |
int inline_size |
414 |
array_nextsize (int elem, int cur, int cnt) |
415 |
{ |
416 |
int ncur = cur + 1; |
417 |
|
418 |
do |
419 |
ncur <<= 1; |
420 |
while (cnt > ncur); |
421 |
|
422 |
/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ |
423 |
if (elem * ncur > 4096) |
424 |
{ |
425 |
ncur *= elem; |
426 |
ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; |
427 |
ncur = ncur - sizeof (void *) * 4; |
428 |
ncur /= elem; |
429 |
} |
430 |
|
431 |
return ncur; |
432 |
} |
433 |
|
434 |
static noinline void * |
435 |
array_realloc (int elem, void *base, int *cur, int cnt) |
436 |
{ |
437 |
*cur = array_nextsize (elem, *cur, cnt); |
438 |
return ev_realloc (base, elem * *cur); |
439 |
} |
440 |
|
441 |
#define array_needsize(type,base,cur,cnt,init) \ |
442 |
if (expect_false ((cnt) > (cur))) \ |
443 |
{ \ |
444 |
int ocur_ = (cur); \ |
445 |
(base) = (type *)array_realloc \ |
446 |
(sizeof (type), (base), &(cur), (cnt)); \ |
447 |
init ((base) + (ocur_), (cur) - ocur_); \ |
448 |
} |
449 |
|
450 |
#if 0 |
451 |
#define array_slim(type,stem) \ |
452 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
453 |
{ \ |
454 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
455 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
456 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
457 |
} |
458 |
#endif |
459 |
|
460 |
#define array_free(stem, idx) \ |
461 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
462 |
|
463 |
/*****************************************************************************/ |
464 |
|
465 |
void noinline |
466 |
ev_feed_event (EV_P_ void *w, int revents) |
467 |
{ |
468 |
W w_ = (W)w; |
469 |
int pri = ABSPRI (w_); |
470 |
|
471 |
if (expect_false (w_->pending)) |
472 |
pendings [pri][w_->pending - 1].events |= revents; |
473 |
else |
474 |
{ |
475 |
w_->pending = ++pendingcnt [pri]; |
476 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
477 |
pendings [pri][w_->pending - 1].w = w_; |
478 |
pendings [pri][w_->pending - 1].events = revents; |
479 |
} |
480 |
} |
481 |
|
482 |
void inline_size |
483 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
484 |
{ |
485 |
int i; |
486 |
|
487 |
for (i = 0; i < eventcnt; ++i) |
488 |
ev_feed_event (EV_A_ events [i], type); |
489 |
} |
490 |
|
491 |
/*****************************************************************************/ |
492 |
|
493 |
void inline_size |
494 |
anfds_init (ANFD *base, int count) |
495 |
{ |
496 |
while (count--) |
497 |
{ |
498 |
base->head = 0; |
499 |
base->events = EV_NONE; |
500 |
base->reify = 0; |
501 |
|
502 |
++base; |
503 |
} |
504 |
} |
505 |
|
506 |
void inline_speed |
507 |
fd_event (EV_P_ int fd, int revents) |
508 |
{ |
509 |
ANFD *anfd = anfds + fd; |
510 |
ev_io *w; |
511 |
|
512 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
513 |
{ |
514 |
int ev = w->events & revents; |
515 |
|
516 |
if (ev) |
517 |
ev_feed_event (EV_A_ (W)w, ev); |
518 |
} |
519 |
} |
520 |
|
521 |
void |
522 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
523 |
{ |
524 |
if (fd >= 0 && fd < anfdmax) |
525 |
fd_event (EV_A_ fd, revents); |
526 |
} |
527 |
|
528 |
void inline_size |
529 |
fd_reify (EV_P) |
530 |
{ |
531 |
int i; |
532 |
|
533 |
for (i = 0; i < fdchangecnt; ++i) |
534 |
{ |
535 |
int fd = fdchanges [i]; |
536 |
ANFD *anfd = anfds + fd; |
537 |
ev_io *w; |
538 |
|
539 |
int events = 0; |
540 |
|
541 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
542 |
events |= w->events; |
543 |
|
544 |
#if EV_SELECT_IS_WINSOCKET |
545 |
if (events) |
546 |
{ |
547 |
unsigned long argp; |
548 |
anfd->handle = _get_osfhandle (fd); |
549 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
550 |
} |
551 |
#endif |
552 |
|
553 |
anfd->reify = 0; |
554 |
|
555 |
backend_modify (EV_A_ fd, anfd->events, events); |
556 |
anfd->events = events; |
557 |
} |
558 |
|
559 |
fdchangecnt = 0; |
560 |
} |
561 |
|
562 |
void inline_size |
563 |
fd_change (EV_P_ int fd) |
564 |
{ |
565 |
if (expect_false (anfds [fd].reify)) |
566 |
return; |
567 |
|
568 |
anfds [fd].reify = 1; |
569 |
|
570 |
++fdchangecnt; |
571 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
572 |
fdchanges [fdchangecnt - 1] = fd; |
573 |
} |
574 |
|
575 |
void inline_speed |
576 |
fd_kill (EV_P_ int fd) |
577 |
{ |
578 |
ev_io *w; |
579 |
|
580 |
while ((w = (ev_io *)anfds [fd].head)) |
581 |
{ |
582 |
ev_io_stop (EV_A_ w); |
583 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
584 |
} |
585 |
} |
586 |
|
587 |
int inline_size |
588 |
fd_valid (int fd) |
589 |
{ |
590 |
#ifdef _WIN32 |
591 |
return _get_osfhandle (fd) != -1; |
592 |
#else |
593 |
return fcntl (fd, F_GETFD) != -1; |
594 |
#endif |
595 |
} |
596 |
|
597 |
/* called on EBADF to verify fds */ |
598 |
static void noinline |
599 |
fd_ebadf (EV_P) |
600 |
{ |
601 |
int fd; |
602 |
|
603 |
for (fd = 0; fd < anfdmax; ++fd) |
604 |
if (anfds [fd].events) |
605 |
if (!fd_valid (fd) == -1 && errno == EBADF) |
606 |
fd_kill (EV_A_ fd); |
607 |
} |
608 |
|
609 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
610 |
static void noinline |
611 |
fd_enomem (EV_P) |
612 |
{ |
613 |
int fd; |
614 |
|
615 |
for (fd = anfdmax; fd--; ) |
616 |
if (anfds [fd].events) |
617 |
{ |
618 |
fd_kill (EV_A_ fd); |
619 |
return; |
620 |
} |
621 |
} |
622 |
|
623 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
624 |
static void noinline |
625 |
fd_rearm_all (EV_P) |
626 |
{ |
627 |
int fd; |
628 |
|
629 |
for (fd = 0; fd < anfdmax; ++fd) |
630 |
if (anfds [fd].events) |
631 |
{ |
632 |
anfds [fd].events = 0; |
633 |
fd_change (EV_A_ fd); |
634 |
} |
635 |
} |
636 |
|
637 |
/*****************************************************************************/ |
638 |
|
639 |
void inline_speed |
640 |
upheap (WT *heap, int k) |
641 |
{ |
642 |
WT w = heap [k]; |
643 |
|
644 |
while (k && heap [k >> 1]->at > w->at) |
645 |
{ |
646 |
heap [k] = heap [k >> 1]; |
647 |
((W)heap [k])->active = k + 1; |
648 |
k >>= 1; |
649 |
} |
650 |
|
651 |
heap [k] = w; |
652 |
((W)heap [k])->active = k + 1; |
653 |
|
654 |
} |
655 |
|
656 |
void inline_speed |
657 |
downheap (WT *heap, int N, int k) |
658 |
{ |
659 |
WT w = heap [k]; |
660 |
|
661 |
while (k < (N >> 1)) |
662 |
{ |
663 |
int j = k << 1; |
664 |
|
665 |
if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
666 |
++j; |
667 |
|
668 |
if (w->at <= heap [j]->at) |
669 |
break; |
670 |
|
671 |
heap [k] = heap [j]; |
672 |
((W)heap [k])->active = k + 1; |
673 |
k = j; |
674 |
} |
675 |
|
676 |
heap [k] = w; |
677 |
((W)heap [k])->active = k + 1; |
678 |
} |
679 |
|
680 |
void inline_size |
681 |
adjustheap (WT *heap, int N, int k) |
682 |
{ |
683 |
upheap (heap, k); |
684 |
downheap (heap, N, k); |
685 |
} |
686 |
|
687 |
/*****************************************************************************/ |
688 |
|
689 |
typedef struct |
690 |
{ |
691 |
WL head; |
692 |
sig_atomic_t volatile gotsig; |
693 |
} ANSIG; |
694 |
|
695 |
static ANSIG *signals; |
696 |
static int signalmax; |
697 |
|
698 |
static int sigpipe [2]; |
699 |
static sig_atomic_t volatile gotsig; |
700 |
static ev_io sigev; |
701 |
|
702 |
void inline_size |
703 |
signals_init (ANSIG *base, int count) |
704 |
{ |
705 |
while (count--) |
706 |
{ |
707 |
base->head = 0; |
708 |
base->gotsig = 0; |
709 |
|
710 |
++base; |
711 |
} |
712 |
} |
713 |
|
714 |
static void |
715 |
sighandler (int signum) |
716 |
{ |
717 |
#if _WIN32 |
718 |
signal (signum, sighandler); |
719 |
#endif |
720 |
|
721 |
signals [signum - 1].gotsig = 1; |
722 |
|
723 |
if (!gotsig) |
724 |
{ |
725 |
int old_errno = errno; |
726 |
gotsig = 1; |
727 |
write (sigpipe [1], &signum, 1); |
728 |
errno = old_errno; |
729 |
} |
730 |
} |
731 |
|
732 |
void noinline |
733 |
ev_feed_signal_event (EV_P_ int signum) |
734 |
{ |
735 |
WL w; |
736 |
|
737 |
#if EV_MULTIPLICITY |
738 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
739 |
#endif |
740 |
|
741 |
--signum; |
742 |
|
743 |
if (signum < 0 || signum >= signalmax) |
744 |
return; |
745 |
|
746 |
signals [signum].gotsig = 0; |
747 |
|
748 |
for (w = signals [signum].head; w; w = w->next) |
749 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
750 |
} |
751 |
|
752 |
static void |
753 |
sigcb (EV_P_ ev_io *iow, int revents) |
754 |
{ |
755 |
int signum; |
756 |
|
757 |
read (sigpipe [0], &revents, 1); |
758 |
gotsig = 0; |
759 |
|
760 |
for (signum = signalmax; signum--; ) |
761 |
if (signals [signum].gotsig) |
762 |
ev_feed_signal_event (EV_A_ signum + 1); |
763 |
} |
764 |
|
765 |
void inline_speed |
766 |
fd_intern (int fd) |
767 |
{ |
768 |
#ifdef _WIN32 |
769 |
int arg = 1; |
770 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
771 |
#else |
772 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
773 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
774 |
#endif |
775 |
} |
776 |
|
777 |
static void noinline |
778 |
siginit (EV_P) |
779 |
{ |
780 |
fd_intern (sigpipe [0]); |
781 |
fd_intern (sigpipe [1]); |
782 |
|
783 |
ev_io_set (&sigev, sigpipe [0], EV_READ); |
784 |
ev_io_start (EV_A_ &sigev); |
785 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
786 |
} |
787 |
|
788 |
/*****************************************************************************/ |
789 |
|
790 |
static ev_child *childs [EV_PID_HASHSIZE]; |
791 |
|
792 |
#ifndef _WIN32 |
793 |
|
794 |
static ev_signal childev; |
795 |
|
796 |
void inline_speed |
797 |
child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) |
798 |
{ |
799 |
ev_child *w; |
800 |
|
801 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
802 |
if (w->pid == pid || !w->pid) |
803 |
{ |
804 |
ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ |
805 |
w->rpid = pid; |
806 |
w->rstatus = status; |
807 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
808 |
} |
809 |
} |
810 |
|
811 |
#ifndef WCONTINUED |
812 |
# define WCONTINUED 0 |
813 |
#endif |
814 |
|
815 |
static void |
816 |
childcb (EV_P_ ev_signal *sw, int revents) |
817 |
{ |
818 |
int pid, status; |
819 |
|
820 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
821 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
822 |
if (!WCONTINUED |
823 |
|| errno != EINVAL |
824 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
825 |
return; |
826 |
|
827 |
/* make sure we are called again until all childs have been reaped */ |
828 |
/* we need to do it this way so that the callback gets called before we continue */ |
829 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
830 |
|
831 |
child_reap (EV_A_ sw, pid, pid, status); |
832 |
if (EV_PID_HASHSIZE > 1) |
833 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
834 |
} |
835 |
|
836 |
#endif |
837 |
|
838 |
/*****************************************************************************/ |
839 |
|
840 |
#if EV_USE_PORT |
841 |
# include "ev_port.c" |
842 |
#endif |
843 |
#if EV_USE_KQUEUE |
844 |
# include "ev_kqueue.c" |
845 |
#endif |
846 |
#if EV_USE_EPOLL |
847 |
# include "ev_epoll.c" |
848 |
#endif |
849 |
#if EV_USE_POLL |
850 |
# include "ev_poll.c" |
851 |
#endif |
852 |
#if EV_USE_SELECT |
853 |
# include "ev_select.c" |
854 |
#endif |
855 |
|
856 |
int |
857 |
ev_version_major (void) |
858 |
{ |
859 |
return EV_VERSION_MAJOR; |
860 |
} |
861 |
|
862 |
int |
863 |
ev_version_minor (void) |
864 |
{ |
865 |
return EV_VERSION_MINOR; |
866 |
} |
867 |
|
868 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
869 |
int inline_size |
870 |
enable_secure (void) |
871 |
{ |
872 |
#ifdef _WIN32 |
873 |
return 0; |
874 |
#else |
875 |
return getuid () != geteuid () |
876 |
|| getgid () != getegid (); |
877 |
#endif |
878 |
} |
879 |
|
880 |
unsigned int |
881 |
ev_supported_backends (void) |
882 |
{ |
883 |
unsigned int flags = 0; |
884 |
|
885 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
886 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
887 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
888 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
889 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
890 |
|
891 |
return flags; |
892 |
} |
893 |
|
894 |
unsigned int |
895 |
ev_recommended_backends (void) |
896 |
{ |
897 |
unsigned int flags = ev_supported_backends (); |
898 |
|
899 |
#ifndef __NetBSD__ |
900 |
/* kqueue is borked on everything but netbsd apparently */ |
901 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
902 |
flags &= ~EVBACKEND_KQUEUE; |
903 |
#endif |
904 |
#ifdef __APPLE__ |
905 |
// flags &= ~EVBACKEND_KQUEUE; for documentation |
906 |
flags &= ~EVBACKEND_POLL; |
907 |
#endif |
908 |
|
909 |
return flags; |
910 |
} |
911 |
|
912 |
unsigned int |
913 |
ev_embeddable_backends (void) |
914 |
{ |
915 |
return EVBACKEND_EPOLL |
916 |
| EVBACKEND_KQUEUE |
917 |
| EVBACKEND_PORT; |
918 |
} |
919 |
|
920 |
unsigned int |
921 |
ev_backend (EV_P) |
922 |
{ |
923 |
return backend; |
924 |
} |
925 |
|
926 |
unsigned int |
927 |
ev_loop_count (EV_P) |
928 |
{ |
929 |
return loop_count; |
930 |
} |
931 |
|
932 |
static void noinline |
933 |
loop_init (EV_P_ unsigned int flags) |
934 |
{ |
935 |
if (!backend) |
936 |
{ |
937 |
#if EV_USE_MONOTONIC |
938 |
{ |
939 |
struct timespec ts; |
940 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
941 |
have_monotonic = 1; |
942 |
} |
943 |
#endif |
944 |
|
945 |
ev_rt_now = ev_time (); |
946 |
mn_now = get_clock (); |
947 |
now_floor = mn_now; |
948 |
rtmn_diff = ev_rt_now - mn_now; |
949 |
|
950 |
/* pid check not overridable via env */ |
951 |
#ifndef _WIN32 |
952 |
if (flags & EVFLAG_FORKCHECK) |
953 |
curpid = getpid (); |
954 |
#endif |
955 |
|
956 |
if (!(flags & EVFLAG_NOENV) |
957 |
&& !enable_secure () |
958 |
&& getenv ("LIBEV_FLAGS")) |
959 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
960 |
|
961 |
if (!(flags & 0x0000ffffUL)) |
962 |
flags |= ev_recommended_backends (); |
963 |
|
964 |
backend = 0; |
965 |
backend_fd = -1; |
966 |
#if EV_USE_INOTIFY |
967 |
fs_fd = -2; |
968 |
#endif |
969 |
|
970 |
#if EV_USE_PORT |
971 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
972 |
#endif |
973 |
#if EV_USE_KQUEUE |
974 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
975 |
#endif |
976 |
#if EV_USE_EPOLL |
977 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
978 |
#endif |
979 |
#if EV_USE_POLL |
980 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
981 |
#endif |
982 |
#if EV_USE_SELECT |
983 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
984 |
#endif |
985 |
|
986 |
ev_init (&sigev, sigcb); |
987 |
ev_set_priority (&sigev, EV_MAXPRI); |
988 |
} |
989 |
} |
990 |
|
991 |
static void noinline |
992 |
loop_destroy (EV_P) |
993 |
{ |
994 |
int i; |
995 |
|
996 |
#if EV_USE_INOTIFY |
997 |
if (fs_fd >= 0) |
998 |
close (fs_fd); |
999 |
#endif |
1000 |
|
1001 |
if (backend_fd >= 0) |
1002 |
close (backend_fd); |
1003 |
|
1004 |
#if EV_USE_PORT |
1005 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
1006 |
#endif |
1007 |
#if EV_USE_KQUEUE |
1008 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
1009 |
#endif |
1010 |
#if EV_USE_EPOLL |
1011 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1012 |
#endif |
1013 |
#if EV_USE_POLL |
1014 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1015 |
#endif |
1016 |
#if EV_USE_SELECT |
1017 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1018 |
#endif |
1019 |
|
1020 |
for (i = NUMPRI; i--; ) |
1021 |
{ |
1022 |
array_free (pending, [i]); |
1023 |
#if EV_IDLE_ENABLE |
1024 |
array_free (idle, [i]); |
1025 |
#endif |
1026 |
} |
1027 |
|
1028 |
/* have to use the microsoft-never-gets-it-right macro */ |
1029 |
array_free (fdchange, EMPTY); |
1030 |
array_free (timer, EMPTY); |
1031 |
#if EV_PERIODIC_ENABLE |
1032 |
array_free (periodic, EMPTY); |
1033 |
#endif |
1034 |
array_free (prepare, EMPTY); |
1035 |
array_free (check, EMPTY); |
1036 |
|
1037 |
backend = 0; |
1038 |
} |
1039 |
|
1040 |
void inline_size infy_fork (EV_P); |
1041 |
|
1042 |
void inline_size |
1043 |
loop_fork (EV_P) |
1044 |
{ |
1045 |
#if EV_USE_PORT |
1046 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1047 |
#endif |
1048 |
#if EV_USE_KQUEUE |
1049 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1050 |
#endif |
1051 |
#if EV_USE_EPOLL |
1052 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1053 |
#endif |
1054 |
#if EV_USE_INOTIFY |
1055 |
infy_fork (EV_A); |
1056 |
#endif |
1057 |
|
1058 |
if (ev_is_active (&sigev)) |
1059 |
{ |
1060 |
/* default loop */ |
1061 |
|
1062 |
ev_ref (EV_A); |
1063 |
ev_io_stop (EV_A_ &sigev); |
1064 |
close (sigpipe [0]); |
1065 |
close (sigpipe [1]); |
1066 |
|
1067 |
while (pipe (sigpipe)) |
1068 |
syserr ("(libev) error creating pipe"); |
1069 |
|
1070 |
siginit (EV_A); |
1071 |
} |
1072 |
|
1073 |
postfork = 0; |
1074 |
} |
1075 |
|
1076 |
#if EV_MULTIPLICITY |
1077 |
struct ev_loop * |
1078 |
ev_loop_new (unsigned int flags) |
1079 |
{ |
1080 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1081 |
|
1082 |
memset (loop, 0, sizeof (struct ev_loop)); |
1083 |
|
1084 |
loop_init (EV_A_ flags); |
1085 |
|
1086 |
if (ev_backend (EV_A)) |
1087 |
return loop; |
1088 |
|
1089 |
return 0; |
1090 |
} |
1091 |
|
1092 |
void |
1093 |
ev_loop_destroy (EV_P) |
1094 |
{ |
1095 |
loop_destroy (EV_A); |
1096 |
ev_free (loop); |
1097 |
} |
1098 |
|
1099 |
void |
1100 |
ev_loop_fork (EV_P) |
1101 |
{ |
1102 |
postfork = 1; |
1103 |
} |
1104 |
|
1105 |
#endif |
1106 |
|
1107 |
#if EV_MULTIPLICITY |
1108 |
struct ev_loop * |
1109 |
ev_default_loop_init (unsigned int flags) |
1110 |
#else |
1111 |
int |
1112 |
ev_default_loop (unsigned int flags) |
1113 |
#endif |
1114 |
{ |
1115 |
if (sigpipe [0] == sigpipe [1]) |
1116 |
if (pipe (sigpipe)) |
1117 |
return 0; |
1118 |
|
1119 |
if (!ev_default_loop_ptr) |
1120 |
{ |
1121 |
#if EV_MULTIPLICITY |
1122 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
1123 |
#else |
1124 |
ev_default_loop_ptr = 1; |
1125 |
#endif |
1126 |
|
1127 |
loop_init (EV_A_ flags); |
1128 |
|
1129 |
if (ev_backend (EV_A)) |
1130 |
{ |
1131 |
siginit (EV_A); |
1132 |
|
1133 |
#ifndef _WIN32 |
1134 |
ev_signal_init (&childev, childcb, SIGCHLD); |
1135 |
ev_set_priority (&childev, EV_MAXPRI); |
1136 |
ev_signal_start (EV_A_ &childev); |
1137 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
1138 |
#endif |
1139 |
} |
1140 |
else |
1141 |
ev_default_loop_ptr = 0; |
1142 |
} |
1143 |
|
1144 |
return ev_default_loop_ptr; |
1145 |
} |
1146 |
|
1147 |
void |
1148 |
ev_default_destroy (void) |
1149 |
{ |
1150 |
#if EV_MULTIPLICITY |
1151 |
struct ev_loop *loop = ev_default_loop_ptr; |
1152 |
#endif |
1153 |
|
1154 |
#ifndef _WIN32 |
1155 |
ev_ref (EV_A); /* child watcher */ |
1156 |
ev_signal_stop (EV_A_ &childev); |
1157 |
#endif |
1158 |
|
1159 |
ev_ref (EV_A); /* signal watcher */ |
1160 |
ev_io_stop (EV_A_ &sigev); |
1161 |
|
1162 |
close (sigpipe [0]); sigpipe [0] = 0; |
1163 |
close (sigpipe [1]); sigpipe [1] = 0; |
1164 |
|
1165 |
loop_destroy (EV_A); |
1166 |
} |
1167 |
|
1168 |
void |
1169 |
ev_default_fork (void) |
1170 |
{ |
1171 |
#if EV_MULTIPLICITY |
1172 |
struct ev_loop *loop = ev_default_loop_ptr; |
1173 |
#endif |
1174 |
|
1175 |
if (backend) |
1176 |
postfork = 1; |
1177 |
} |
1178 |
|
1179 |
/*****************************************************************************/ |
1180 |
|
1181 |
void |
1182 |
ev_invoke (EV_P_ void *w, int revents) |
1183 |
{ |
1184 |
EV_CB_INVOKE ((W)w, revents); |
1185 |
} |
1186 |
|
1187 |
void inline_speed |
1188 |
call_pending (EV_P) |
1189 |
{ |
1190 |
int pri; |
1191 |
|
1192 |
for (pri = NUMPRI; pri--; ) |
1193 |
while (pendingcnt [pri]) |
1194 |
{ |
1195 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1196 |
|
1197 |
if (expect_true (p->w)) |
1198 |
{ |
1199 |
/*assert (("non-pending watcher on pending list", p->w->pending));*/ |
1200 |
|
1201 |
p->w->pending = 0; |
1202 |
EV_CB_INVOKE (p->w, p->events); |
1203 |
} |
1204 |
} |
1205 |
} |
1206 |
|
1207 |
void inline_size |
1208 |
timers_reify (EV_P) |
1209 |
{ |
1210 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
1211 |
{ |
1212 |
ev_timer *w = timers [0]; |
1213 |
|
1214 |
/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ |
1215 |
|
1216 |
/* first reschedule or stop timer */ |
1217 |
if (w->repeat) |
1218 |
{ |
1219 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1220 |
|
1221 |
((WT)w)->at += w->repeat; |
1222 |
if (((WT)w)->at < mn_now) |
1223 |
((WT)w)->at = mn_now; |
1224 |
|
1225 |
downheap ((WT *)timers, timercnt, 0); |
1226 |
} |
1227 |
else |
1228 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1229 |
|
1230 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
1231 |
} |
1232 |
} |
1233 |
|
1234 |
#if EV_PERIODIC_ENABLE |
1235 |
void inline_size |
1236 |
periodics_reify (EV_P) |
1237 |
{ |
1238 |
while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
1239 |
{ |
1240 |
ev_periodic *w = periodics [0]; |
1241 |
|
1242 |
/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ |
1243 |
|
1244 |
/* first reschedule or stop timer */ |
1245 |
if (w->reschedule_cb) |
1246 |
{ |
1247 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); |
1248 |
assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
1249 |
downheap ((WT *)periodics, periodiccnt, 0); |
1250 |
} |
1251 |
else if (w->interval) |
1252 |
{ |
1253 |
((WT)w)->at = w->offset + floor ((ev_rt_now + TIME_EPSILON - w->offset) / w->interval + 1.) * w->interval; |
1254 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
1255 |
downheap ((WT *)periodics, periodiccnt, 0); |
1256 |
} |
1257 |
else |
1258 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1259 |
|
1260 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
1261 |
} |
1262 |
} |
1263 |
|
1264 |
static void noinline |
1265 |
periodics_reschedule (EV_P) |
1266 |
{ |
1267 |
int i; |
1268 |
|
1269 |
/* adjust periodics after time jump */ |
1270 |
for (i = 0; i < periodiccnt; ++i) |
1271 |
{ |
1272 |
ev_periodic *w = periodics [i]; |
1273 |
|
1274 |
if (w->reschedule_cb) |
1275 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1276 |
else if (w->interval) |
1277 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1278 |
} |
1279 |
|
1280 |
/* now rebuild the heap */ |
1281 |
for (i = periodiccnt >> 1; i--; ) |
1282 |
downheap ((WT *)periodics, periodiccnt, i); |
1283 |
} |
1284 |
#endif |
1285 |
|
1286 |
#if EV_IDLE_ENABLE |
1287 |
void inline_size |
1288 |
idle_reify (EV_P) |
1289 |
{ |
1290 |
if (expect_false (idleall)) |
1291 |
{ |
1292 |
int pri; |
1293 |
|
1294 |
for (pri = NUMPRI; pri--; ) |
1295 |
{ |
1296 |
if (pendingcnt [pri]) |
1297 |
break; |
1298 |
|
1299 |
if (idlecnt [pri]) |
1300 |
{ |
1301 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
1302 |
break; |
1303 |
} |
1304 |
} |
1305 |
} |
1306 |
} |
1307 |
#endif |
1308 |
|
1309 |
int inline_size |
1310 |
time_update_monotonic (EV_P) |
1311 |
{ |
1312 |
mn_now = get_clock (); |
1313 |
|
1314 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
1315 |
{ |
1316 |
ev_rt_now = rtmn_diff + mn_now; |
1317 |
return 0; |
1318 |
} |
1319 |
else |
1320 |
{ |
1321 |
now_floor = mn_now; |
1322 |
ev_rt_now = ev_time (); |
1323 |
return 1; |
1324 |
} |
1325 |
} |
1326 |
|
1327 |
void inline_size |
1328 |
time_update (EV_P) |
1329 |
{ |
1330 |
int i; |
1331 |
|
1332 |
#if EV_USE_MONOTONIC |
1333 |
if (expect_true (have_monotonic)) |
1334 |
{ |
1335 |
if (time_update_monotonic (EV_A)) |
1336 |
{ |
1337 |
ev_tstamp odiff = rtmn_diff; |
1338 |
|
1339 |
/* loop a few times, before making important decisions. |
1340 |
* on the choice of "4": one iteration isn't enough, |
1341 |
* in case we get preempted during the calls to |
1342 |
* ev_time and get_clock. a second call is almost guaranteed |
1343 |
* to succeed in that case, though. and looping a few more times |
1344 |
* doesn't hurt either as we only do this on time-jumps or |
1345 |
* in the unlikely event of having been preempted here. |
1346 |
*/ |
1347 |
for (i = 4; --i; ) |
1348 |
{ |
1349 |
rtmn_diff = ev_rt_now - mn_now; |
1350 |
|
1351 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
1352 |
return; /* all is well */ |
1353 |
|
1354 |
ev_rt_now = ev_time (); |
1355 |
mn_now = get_clock (); |
1356 |
now_floor = mn_now; |
1357 |
} |
1358 |
|
1359 |
# if EV_PERIODIC_ENABLE |
1360 |
periodics_reschedule (EV_A); |
1361 |
# endif |
1362 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
1363 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
1364 |
} |
1365 |
} |
1366 |
else |
1367 |
#endif |
1368 |
{ |
1369 |
ev_rt_now = ev_time (); |
1370 |
|
1371 |
if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
1372 |
{ |
1373 |
#if EV_PERIODIC_ENABLE |
1374 |
periodics_reschedule (EV_A); |
1375 |
#endif |
1376 |
|
1377 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
1378 |
for (i = 0; i < timercnt; ++i) |
1379 |
((WT)timers [i])->at += ev_rt_now - mn_now; |
1380 |
} |
1381 |
|
1382 |
mn_now = ev_rt_now; |
1383 |
} |
1384 |
} |
1385 |
|
1386 |
void |
1387 |
ev_ref (EV_P) |
1388 |
{ |
1389 |
++activecnt; |
1390 |
} |
1391 |
|
1392 |
void |
1393 |
ev_unref (EV_P) |
1394 |
{ |
1395 |
--activecnt; |
1396 |
} |
1397 |
|
1398 |
static int loop_done; |
1399 |
|
1400 |
void |
1401 |
ev_loop (EV_P_ int flags) |
1402 |
{ |
1403 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) |
1404 |
? EVUNLOOP_ONE |
1405 |
: EVUNLOOP_CANCEL; |
1406 |
|
1407 |
call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ |
1408 |
|
1409 |
do |
1410 |
{ |
1411 |
#ifndef _WIN32 |
1412 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
1413 |
if (expect_false (getpid () != curpid)) |
1414 |
{ |
1415 |
curpid = getpid (); |
1416 |
postfork = 1; |
1417 |
} |
1418 |
#endif |
1419 |
|
1420 |
#if EV_FORK_ENABLE |
1421 |
/* we might have forked, so queue fork handlers */ |
1422 |
if (expect_false (postfork)) |
1423 |
if (forkcnt) |
1424 |
{ |
1425 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
1426 |
call_pending (EV_A); |
1427 |
} |
1428 |
#endif |
1429 |
|
1430 |
/* queue prepare watchers (and execute them) */ |
1431 |
if (expect_false (preparecnt)) |
1432 |
{ |
1433 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
1434 |
call_pending (EV_A); |
1435 |
} |
1436 |
|
1437 |
if (expect_false (!activecnt)) |
1438 |
break; |
1439 |
|
1440 |
/* we might have forked, so reify kernel state if necessary */ |
1441 |
if (expect_false (postfork)) |
1442 |
loop_fork (EV_A); |
1443 |
|
1444 |
/* update fd-related kernel structures */ |
1445 |
fd_reify (EV_A); |
1446 |
|
1447 |
/* calculate blocking time */ |
1448 |
{ |
1449 |
ev_tstamp block; |
1450 |
|
1451 |
if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) |
1452 |
block = 0.; /* do not block at all */ |
1453 |
else |
1454 |
{ |
1455 |
/* update time to cancel out callback processing overhead */ |
1456 |
#if EV_USE_MONOTONIC |
1457 |
if (expect_true (have_monotonic)) |
1458 |
time_update_monotonic (EV_A); |
1459 |
else |
1460 |
#endif |
1461 |
{ |
1462 |
ev_rt_now = ev_time (); |
1463 |
mn_now = ev_rt_now; |
1464 |
} |
1465 |
|
1466 |
block = MAX_BLOCKTIME; |
1467 |
|
1468 |
if (timercnt) |
1469 |
{ |
1470 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; |
1471 |
if (block > to) block = to; |
1472 |
} |
1473 |
|
1474 |
#if EV_PERIODIC_ENABLE |
1475 |
if (periodiccnt) |
1476 |
{ |
1477 |
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; |
1478 |
if (block > to) block = to; |
1479 |
} |
1480 |
#endif |
1481 |
|
1482 |
if (expect_false (block < 0.)) block = 0.; |
1483 |
} |
1484 |
|
1485 |
++loop_count; |
1486 |
backend_poll (EV_A_ block); |
1487 |
} |
1488 |
|
1489 |
/* update ev_rt_now, do magic */ |
1490 |
time_update (EV_A); |
1491 |
|
1492 |
/* queue pending timers and reschedule them */ |
1493 |
timers_reify (EV_A); /* relative timers called last */ |
1494 |
#if EV_PERIODIC_ENABLE |
1495 |
periodics_reify (EV_A); /* absolute timers called first */ |
1496 |
#endif |
1497 |
|
1498 |
#if EV_IDLE_ENABLE |
1499 |
/* queue idle watchers unless other events are pending */ |
1500 |
idle_reify (EV_A); |
1501 |
#endif |
1502 |
|
1503 |
/* queue check watchers, to be executed first */ |
1504 |
if (expect_false (checkcnt)) |
1505 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
1506 |
|
1507 |
call_pending (EV_A); |
1508 |
|
1509 |
} |
1510 |
while (expect_true (activecnt && !loop_done)); |
1511 |
|
1512 |
if (loop_done == EVUNLOOP_ONE) |
1513 |
loop_done = EVUNLOOP_CANCEL; |
1514 |
} |
1515 |
|
1516 |
void |
1517 |
ev_unloop (EV_P_ int how) |
1518 |
{ |
1519 |
loop_done = how; |
1520 |
} |
1521 |
|
1522 |
/*****************************************************************************/ |
1523 |
|
1524 |
void inline_size |
1525 |
wlist_add (WL *head, WL elem) |
1526 |
{ |
1527 |
elem->next = *head; |
1528 |
*head = elem; |
1529 |
} |
1530 |
|
1531 |
void inline_size |
1532 |
wlist_del (WL *head, WL elem) |
1533 |
{ |
1534 |
while (*head) |
1535 |
{ |
1536 |
if (*head == elem) |
1537 |
{ |
1538 |
*head = elem->next; |
1539 |
return; |
1540 |
} |
1541 |
|
1542 |
head = &(*head)->next; |
1543 |
} |
1544 |
} |
1545 |
|
1546 |
void inline_speed |
1547 |
clear_pending (EV_P_ W w) |
1548 |
{ |
1549 |
if (w->pending) |
1550 |
{ |
1551 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
1552 |
w->pending = 0; |
1553 |
} |
1554 |
} |
1555 |
|
1556 |
int |
1557 |
ev_clear_pending (EV_P_ void *w) |
1558 |
{ |
1559 |
W w_ = (W)w; |
1560 |
int pending = w_->pending; |
1561 |
|
1562 |
if (expect_true (pending)) |
1563 |
{ |
1564 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
1565 |
w_->pending = 0; |
1566 |
p->w = 0; |
1567 |
return p->events; |
1568 |
} |
1569 |
else |
1570 |
return 0; |
1571 |
} |
1572 |
|
1573 |
void inline_size |
1574 |
pri_adjust (EV_P_ W w) |
1575 |
{ |
1576 |
int pri = w->priority; |
1577 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
1578 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
1579 |
w->priority = pri; |
1580 |
} |
1581 |
|
1582 |
void inline_speed |
1583 |
ev_start (EV_P_ W w, int active) |
1584 |
{ |
1585 |
pri_adjust (EV_A_ w); |
1586 |
w->active = active; |
1587 |
ev_ref (EV_A); |
1588 |
} |
1589 |
|
1590 |
void inline_size |
1591 |
ev_stop (EV_P_ W w) |
1592 |
{ |
1593 |
ev_unref (EV_A); |
1594 |
w->active = 0; |
1595 |
} |
1596 |
|
1597 |
/*****************************************************************************/ |
1598 |
|
1599 |
void noinline |
1600 |
ev_io_start (EV_P_ ev_io *w) |
1601 |
{ |
1602 |
int fd = w->fd; |
1603 |
|
1604 |
if (expect_false (ev_is_active (w))) |
1605 |
return; |
1606 |
|
1607 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
1608 |
|
1609 |
ev_start (EV_A_ (W)w, 1); |
1610 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
1611 |
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
1612 |
|
1613 |
fd_change (EV_A_ fd); |
1614 |
} |
1615 |
|
1616 |
void noinline |
1617 |
ev_io_stop (EV_P_ ev_io *w) |
1618 |
{ |
1619 |
clear_pending (EV_A_ (W)w); |
1620 |
if (expect_false (!ev_is_active (w))) |
1621 |
return; |
1622 |
|
1623 |
assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
1624 |
|
1625 |
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
1626 |
ev_stop (EV_A_ (W)w); |
1627 |
|
1628 |
fd_change (EV_A_ w->fd); |
1629 |
} |
1630 |
|
1631 |
void noinline |
1632 |
ev_timer_start (EV_P_ ev_timer *w) |
1633 |
{ |
1634 |
if (expect_false (ev_is_active (w))) |
1635 |
return; |
1636 |
|
1637 |
((WT)w)->at += mn_now; |
1638 |
|
1639 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
1640 |
|
1641 |
ev_start (EV_A_ (W)w, ++timercnt); |
1642 |
array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); |
1643 |
timers [timercnt - 1] = w; |
1644 |
upheap ((WT *)timers, timercnt - 1); |
1645 |
|
1646 |
/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ |
1647 |
} |
1648 |
|
1649 |
void noinline |
1650 |
ev_timer_stop (EV_P_ ev_timer *w) |
1651 |
{ |
1652 |
clear_pending (EV_A_ (W)w); |
1653 |
if (expect_false (!ev_is_active (w))) |
1654 |
return; |
1655 |
|
1656 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
1657 |
|
1658 |
{ |
1659 |
int active = ((W)w)->active; |
1660 |
|
1661 |
if (expect_true (--active < --timercnt)) |
1662 |
{ |
1663 |
timers [active] = timers [timercnt]; |
1664 |
adjustheap ((WT *)timers, timercnt, active); |
1665 |
} |
1666 |
} |
1667 |
|
1668 |
((WT)w)->at -= mn_now; |
1669 |
|
1670 |
ev_stop (EV_A_ (W)w); |
1671 |
} |
1672 |
|
1673 |
void noinline |
1674 |
ev_timer_again (EV_P_ ev_timer *w) |
1675 |
{ |
1676 |
if (ev_is_active (w)) |
1677 |
{ |
1678 |
if (w->repeat) |
1679 |
{ |
1680 |
((WT)w)->at = mn_now + w->repeat; |
1681 |
adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
1682 |
} |
1683 |
else |
1684 |
ev_timer_stop (EV_A_ w); |
1685 |
} |
1686 |
else if (w->repeat) |
1687 |
{ |
1688 |
w->at = w->repeat; |
1689 |
ev_timer_start (EV_A_ w); |
1690 |
} |
1691 |
} |
1692 |
|
1693 |
#if EV_PERIODIC_ENABLE |
1694 |
void noinline |
1695 |
ev_periodic_start (EV_P_ ev_periodic *w) |
1696 |
{ |
1697 |
if (expect_false (ev_is_active (w))) |
1698 |
return; |
1699 |
|
1700 |
if (w->reschedule_cb) |
1701 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1702 |
else if (w->interval) |
1703 |
{ |
1704 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
1705 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
1706 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1707 |
} |
1708 |
else |
1709 |
((WT)w)->at = w->offset; |
1710 |
|
1711 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
1712 |
array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); |
1713 |
periodics [periodiccnt - 1] = w; |
1714 |
upheap ((WT *)periodics, periodiccnt - 1); |
1715 |
|
1716 |
/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ |
1717 |
} |
1718 |
|
1719 |
void noinline |
1720 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
1721 |
{ |
1722 |
clear_pending (EV_A_ (W)w); |
1723 |
if (expect_false (!ev_is_active (w))) |
1724 |
return; |
1725 |
|
1726 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
1727 |
|
1728 |
{ |
1729 |
int active = ((W)w)->active; |
1730 |
|
1731 |
if (expect_true (--active < --periodiccnt)) |
1732 |
{ |
1733 |
periodics [active] = periodics [periodiccnt]; |
1734 |
adjustheap ((WT *)periodics, periodiccnt, active); |
1735 |
} |
1736 |
} |
1737 |
|
1738 |
ev_stop (EV_A_ (W)w); |
1739 |
} |
1740 |
|
1741 |
void noinline |
1742 |
ev_periodic_again (EV_P_ ev_periodic *w) |
1743 |
{ |
1744 |
/* TODO: use adjustheap and recalculation */ |
1745 |
ev_periodic_stop (EV_A_ w); |
1746 |
ev_periodic_start (EV_A_ w); |
1747 |
} |
1748 |
#endif |
1749 |
|
1750 |
#ifndef SA_RESTART |
1751 |
# define SA_RESTART 0 |
1752 |
#endif |
1753 |
|
1754 |
void noinline |
1755 |
ev_signal_start (EV_P_ ev_signal *w) |
1756 |
{ |
1757 |
#if EV_MULTIPLICITY |
1758 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1759 |
#endif |
1760 |
if (expect_false (ev_is_active (w))) |
1761 |
return; |
1762 |
|
1763 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
1764 |
|
1765 |
ev_start (EV_A_ (W)w, 1); |
1766 |
array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
1767 |
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1768 |
|
1769 |
if (!((WL)w)->next) |
1770 |
{ |
1771 |
#if _WIN32 |
1772 |
signal (w->signum, sighandler); |
1773 |
#else |
1774 |
struct sigaction sa; |
1775 |
sa.sa_handler = sighandler; |
1776 |
sigfillset (&sa.sa_mask); |
1777 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
1778 |
sigaction (w->signum, &sa, 0); |
1779 |
#endif |
1780 |
} |
1781 |
} |
1782 |
|
1783 |
void noinline |
1784 |
ev_signal_stop (EV_P_ ev_signal *w) |
1785 |
{ |
1786 |
clear_pending (EV_A_ (W)w); |
1787 |
if (expect_false (!ev_is_active (w))) |
1788 |
return; |
1789 |
|
1790 |
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1791 |
ev_stop (EV_A_ (W)w); |
1792 |
|
1793 |
if (!signals [w->signum - 1].head) |
1794 |
signal (w->signum, SIG_DFL); |
1795 |
} |
1796 |
|
1797 |
void |
1798 |
ev_child_start (EV_P_ ev_child *w) |
1799 |
{ |
1800 |
#if EV_MULTIPLICITY |
1801 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1802 |
#endif |
1803 |
if (expect_false (ev_is_active (w))) |
1804 |
return; |
1805 |
|
1806 |
ev_start (EV_A_ (W)w, 1); |
1807 |
wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1808 |
} |
1809 |
|
1810 |
void |
1811 |
ev_child_stop (EV_P_ ev_child *w) |
1812 |
{ |
1813 |
clear_pending (EV_A_ (W)w); |
1814 |
if (expect_false (!ev_is_active (w))) |
1815 |
return; |
1816 |
|
1817 |
wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1818 |
ev_stop (EV_A_ (W)w); |
1819 |
} |
1820 |
|
1821 |
#if EV_STAT_ENABLE |
1822 |
|
1823 |
# ifdef _WIN32 |
1824 |
# undef lstat |
1825 |
# define lstat(a,b) _stati64 (a,b) |
1826 |
# endif |
1827 |
|
1828 |
#define DEF_STAT_INTERVAL 5.0074891 |
1829 |
#define MIN_STAT_INTERVAL 0.1074891 |
1830 |
|
1831 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
1832 |
|
1833 |
#if EV_USE_INOTIFY |
1834 |
# define EV_INOTIFY_BUFSIZE 8192 |
1835 |
|
1836 |
static void noinline |
1837 |
infy_add (EV_P_ ev_stat *w) |
1838 |
{ |
1839 |
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); |
1840 |
|
1841 |
if (w->wd < 0) |
1842 |
{ |
1843 |
ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
1844 |
|
1845 |
/* monitor some parent directory for speedup hints */ |
1846 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
1847 |
{ |
1848 |
char path [4096]; |
1849 |
strcpy (path, w->path); |
1850 |
|
1851 |
do |
1852 |
{ |
1853 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
1854 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
1855 |
|
1856 |
char *pend = strrchr (path, '/'); |
1857 |
|
1858 |
if (!pend) |
1859 |
break; /* whoops, no '/', complain to your admin */ |
1860 |
|
1861 |
*pend = 0; |
1862 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
1863 |
} |
1864 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
1865 |
} |
1866 |
} |
1867 |
else |
1868 |
ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ |
1869 |
|
1870 |
if (w->wd >= 0) |
1871 |
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
1872 |
} |
1873 |
|
1874 |
static void noinline |
1875 |
infy_del (EV_P_ ev_stat *w) |
1876 |
{ |
1877 |
int slot; |
1878 |
int wd = w->wd; |
1879 |
|
1880 |
if (wd < 0) |
1881 |
return; |
1882 |
|
1883 |
w->wd = -2; |
1884 |
slot = wd & (EV_INOTIFY_HASHSIZE - 1); |
1885 |
wlist_del (&fs_hash [slot].head, (WL)w); |
1886 |
|
1887 |
/* remove this watcher, if others are watching it, they will rearm */ |
1888 |
inotify_rm_watch (fs_fd, wd); |
1889 |
} |
1890 |
|
1891 |
static void noinline |
1892 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
1893 |
{ |
1894 |
if (slot < 0) |
1895 |
/* overflow, need to check for all hahs slots */ |
1896 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
1897 |
infy_wd (EV_A_ slot, wd, ev); |
1898 |
else |
1899 |
{ |
1900 |
WL w_; |
1901 |
|
1902 |
for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) |
1903 |
{ |
1904 |
ev_stat *w = (ev_stat *)w_; |
1905 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
1906 |
|
1907 |
if (w->wd == wd || wd == -1) |
1908 |
{ |
1909 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
1910 |
{ |
1911 |
w->wd = -1; |
1912 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
1913 |
} |
1914 |
|
1915 |
stat_timer_cb (EV_A_ &w->timer, 0); |
1916 |
} |
1917 |
} |
1918 |
} |
1919 |
} |
1920 |
|
1921 |
static void |
1922 |
infy_cb (EV_P_ ev_io *w, int revents) |
1923 |
{ |
1924 |
char buf [EV_INOTIFY_BUFSIZE]; |
1925 |
struct inotify_event *ev = (struct inotify_event *)buf; |
1926 |
int ofs; |
1927 |
int len = read (fs_fd, buf, sizeof (buf)); |
1928 |
|
1929 |
for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
1930 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
1931 |
} |
1932 |
|
1933 |
void inline_size |
1934 |
infy_init (EV_P) |
1935 |
{ |
1936 |
if (fs_fd != -2) |
1937 |
return; |
1938 |
|
1939 |
fs_fd = inotify_init (); |
1940 |
|
1941 |
if (fs_fd >= 0) |
1942 |
{ |
1943 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
1944 |
ev_set_priority (&fs_w, EV_MAXPRI); |
1945 |
ev_io_start (EV_A_ &fs_w); |
1946 |
} |
1947 |
} |
1948 |
|
1949 |
void inline_size |
1950 |
infy_fork (EV_P) |
1951 |
{ |
1952 |
int slot; |
1953 |
|
1954 |
if (fs_fd < 0) |
1955 |
return; |
1956 |
|
1957 |
close (fs_fd); |
1958 |
fs_fd = inotify_init (); |
1959 |
|
1960 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
1961 |
{ |
1962 |
WL w_ = fs_hash [slot].head; |
1963 |
fs_hash [slot].head = 0; |
1964 |
|
1965 |
while (w_) |
1966 |
{ |
1967 |
ev_stat *w = (ev_stat *)w_; |
1968 |
w_ = w_->next; /* lets us add this watcher */ |
1969 |
|
1970 |
w->wd = -1; |
1971 |
|
1972 |
if (fs_fd >= 0) |
1973 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
1974 |
else |
1975 |
ev_timer_start (EV_A_ &w->timer); |
1976 |
} |
1977 |
|
1978 |
} |
1979 |
} |
1980 |
|
1981 |
#endif |
1982 |
|
1983 |
void |
1984 |
ev_stat_stat (EV_P_ ev_stat *w) |
1985 |
{ |
1986 |
if (lstat (w->path, &w->attr) < 0) |
1987 |
w->attr.st_nlink = 0; |
1988 |
else if (!w->attr.st_nlink) |
1989 |
w->attr.st_nlink = 1; |
1990 |
} |
1991 |
|
1992 |
static void noinline |
1993 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
1994 |
{ |
1995 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
1996 |
|
1997 |
/* we copy this here each the time so that */ |
1998 |
/* prev has the old value when the callback gets invoked */ |
1999 |
w->prev = w->attr; |
2000 |
ev_stat_stat (EV_A_ w); |
2001 |
|
2002 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
2003 |
if ( |
2004 |
w->prev.st_dev != w->attr.st_dev |
2005 |
|| w->prev.st_ino != w->attr.st_ino |
2006 |
|| w->prev.st_mode != w->attr.st_mode |
2007 |
|| w->prev.st_nlink != w->attr.st_nlink |
2008 |
|| w->prev.st_uid != w->attr.st_uid |
2009 |
|| w->prev.st_gid != w->attr.st_gid |
2010 |
|| w->prev.st_rdev != w->attr.st_rdev |
2011 |
|| w->prev.st_size != w->attr.st_size |
2012 |
|| w->prev.st_atime != w->attr.st_atime |
2013 |
|| w->prev.st_mtime != w->attr.st_mtime |
2014 |
|| w->prev.st_ctime != w->attr.st_ctime |
2015 |
) { |
2016 |
#if EV_USE_INOTIFY |
2017 |
infy_del (EV_A_ w); |
2018 |
infy_add (EV_A_ w); |
2019 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
2020 |
#endif |
2021 |
|
2022 |
ev_feed_event (EV_A_ w, EV_STAT); |
2023 |
} |
2024 |
} |
2025 |
|
2026 |
void |
2027 |
ev_stat_start (EV_P_ ev_stat *w) |
2028 |
{ |
2029 |
if (expect_false (ev_is_active (w))) |
2030 |
return; |
2031 |
|
2032 |
/* since we use memcmp, we need to clear any padding data etc. */ |
2033 |
memset (&w->prev, 0, sizeof (ev_statdata)); |
2034 |
memset (&w->attr, 0, sizeof (ev_statdata)); |
2035 |
|
2036 |
ev_stat_stat (EV_A_ w); |
2037 |
|
2038 |
if (w->interval < MIN_STAT_INTERVAL) |
2039 |
w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL; |
2040 |
|
2041 |
ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); |
2042 |
ev_set_priority (&w->timer, ev_priority (w)); |
2043 |
|
2044 |
#if EV_USE_INOTIFY |
2045 |
infy_init (EV_A); |
2046 |
|
2047 |
if (fs_fd >= 0) |
2048 |
infy_add (EV_A_ w); |
2049 |
else |
2050 |
#endif |
2051 |
ev_timer_start (EV_A_ &w->timer); |
2052 |
|
2053 |
ev_start (EV_A_ (W)w, 1); |
2054 |
} |
2055 |
|
2056 |
void |
2057 |
ev_stat_stop (EV_P_ ev_stat *w) |
2058 |
{ |
2059 |
clear_pending (EV_A_ (W)w); |
2060 |
if (expect_false (!ev_is_active (w))) |
2061 |
return; |
2062 |
|
2063 |
#if EV_USE_INOTIFY |
2064 |
infy_del (EV_A_ w); |
2065 |
#endif |
2066 |
ev_timer_stop (EV_A_ &w->timer); |
2067 |
|
2068 |
ev_stop (EV_A_ (W)w); |
2069 |
} |
2070 |
#endif |
2071 |
|
2072 |
#if EV_IDLE_ENABLE |
2073 |
void |
2074 |
ev_idle_start (EV_P_ ev_idle *w) |
2075 |
{ |
2076 |
if (expect_false (ev_is_active (w))) |
2077 |
return; |
2078 |
|
2079 |
pri_adjust (EV_A_ (W)w); |
2080 |
|
2081 |
{ |
2082 |
int active = ++idlecnt [ABSPRI (w)]; |
2083 |
|
2084 |
++idleall; |
2085 |
ev_start (EV_A_ (W)w, active); |
2086 |
|
2087 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
2088 |
idles [ABSPRI (w)][active - 1] = w; |
2089 |
} |
2090 |
} |
2091 |
|
2092 |
void |
2093 |
ev_idle_stop (EV_P_ ev_idle *w) |
2094 |
{ |
2095 |
clear_pending (EV_A_ (W)w); |
2096 |
if (expect_false (!ev_is_active (w))) |
2097 |
return; |
2098 |
|
2099 |
{ |
2100 |
int active = ((W)w)->active; |
2101 |
|
2102 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
2103 |
((W)idles [ABSPRI (w)][active - 1])->active = active; |
2104 |
|
2105 |
ev_stop (EV_A_ (W)w); |
2106 |
--idleall; |
2107 |
} |
2108 |
} |
2109 |
#endif |
2110 |
|
2111 |
void |
2112 |
ev_prepare_start (EV_P_ ev_prepare *w) |
2113 |
{ |
2114 |
if (expect_false (ev_is_active (w))) |
2115 |
return; |
2116 |
|
2117 |
ev_start (EV_A_ (W)w, ++preparecnt); |
2118 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
2119 |
prepares [preparecnt - 1] = w; |
2120 |
} |
2121 |
|
2122 |
void |
2123 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
2124 |
{ |
2125 |
clear_pending (EV_A_ (W)w); |
2126 |
if (expect_false (!ev_is_active (w))) |
2127 |
return; |
2128 |
|
2129 |
{ |
2130 |
int active = ((W)w)->active; |
2131 |
prepares [active - 1] = prepares [--preparecnt]; |
2132 |
((W)prepares [active - 1])->active = active; |
2133 |
} |
2134 |
|
2135 |
ev_stop (EV_A_ (W)w); |
2136 |
} |
2137 |
|
2138 |
void |
2139 |
ev_check_start (EV_P_ ev_check *w) |
2140 |
{ |
2141 |
if (expect_false (ev_is_active (w))) |
2142 |
return; |
2143 |
|
2144 |
ev_start (EV_A_ (W)w, ++checkcnt); |
2145 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
2146 |
checks [checkcnt - 1] = w; |
2147 |
} |
2148 |
|
2149 |
void |
2150 |
ev_check_stop (EV_P_ ev_check *w) |
2151 |
{ |
2152 |
clear_pending (EV_A_ (W)w); |
2153 |
if (expect_false (!ev_is_active (w))) |
2154 |
return; |
2155 |
|
2156 |
{ |
2157 |
int active = ((W)w)->active; |
2158 |
checks [active - 1] = checks [--checkcnt]; |
2159 |
((W)checks [active - 1])->active = active; |
2160 |
} |
2161 |
|
2162 |
ev_stop (EV_A_ (W)w); |
2163 |
} |
2164 |
|
2165 |
#if EV_EMBED_ENABLE |
2166 |
void noinline |
2167 |
ev_embed_sweep (EV_P_ ev_embed *w) |
2168 |
{ |
2169 |
ev_loop (w->loop, EVLOOP_NONBLOCK); |
2170 |
} |
2171 |
|
2172 |
static void |
2173 |
embed_cb (EV_P_ ev_io *io, int revents) |
2174 |
{ |
2175 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
2176 |
|
2177 |
if (ev_cb (w)) |
2178 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
2179 |
else |
2180 |
ev_embed_sweep (loop, w); |
2181 |
} |
2182 |
|
2183 |
void |
2184 |
ev_embed_start (EV_P_ ev_embed *w) |
2185 |
{ |
2186 |
if (expect_false (ev_is_active (w))) |
2187 |
return; |
2188 |
|
2189 |
{ |
2190 |
struct ev_loop *loop = w->loop; |
2191 |
assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
2192 |
ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); |
2193 |
} |
2194 |
|
2195 |
ev_set_priority (&w->io, ev_priority (w)); |
2196 |
ev_io_start (EV_A_ &w->io); |
2197 |
|
2198 |
ev_start (EV_A_ (W)w, 1); |
2199 |
} |
2200 |
|
2201 |
void |
2202 |
ev_embed_stop (EV_P_ ev_embed *w) |
2203 |
{ |
2204 |
clear_pending (EV_A_ (W)w); |
2205 |
if (expect_false (!ev_is_active (w))) |
2206 |
return; |
2207 |
|
2208 |
ev_io_stop (EV_A_ &w->io); |
2209 |
|
2210 |
ev_stop (EV_A_ (W)w); |
2211 |
} |
2212 |
#endif |
2213 |
|
2214 |
#if EV_FORK_ENABLE |
2215 |
void |
2216 |
ev_fork_start (EV_P_ ev_fork *w) |
2217 |
{ |
2218 |
if (expect_false (ev_is_active (w))) |
2219 |
return; |
2220 |
|
2221 |
ev_start (EV_A_ (W)w, ++forkcnt); |
2222 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
2223 |
forks [forkcnt - 1] = w; |
2224 |
} |
2225 |
|
2226 |
void |
2227 |
ev_fork_stop (EV_P_ ev_fork *w) |
2228 |
{ |
2229 |
clear_pending (EV_A_ (W)w); |
2230 |
if (expect_false (!ev_is_active (w))) |
2231 |
return; |
2232 |
|
2233 |
{ |
2234 |
int active = ((W)w)->active; |
2235 |
forks [active - 1] = forks [--forkcnt]; |
2236 |
((W)forks [active - 1])->active = active; |
2237 |
} |
2238 |
|
2239 |
ev_stop (EV_A_ (W)w); |
2240 |
} |
2241 |
#endif |
2242 |
|
2243 |
/*****************************************************************************/ |
2244 |
|
2245 |
struct ev_once |
2246 |
{ |
2247 |
ev_io io; |
2248 |
ev_timer to; |
2249 |
void (*cb)(int revents, void *arg); |
2250 |
void *arg; |
2251 |
}; |
2252 |
|
2253 |
static void |
2254 |
once_cb (EV_P_ struct ev_once *once, int revents) |
2255 |
{ |
2256 |
void (*cb)(int revents, void *arg) = once->cb; |
2257 |
void *arg = once->arg; |
2258 |
|
2259 |
ev_io_stop (EV_A_ &once->io); |
2260 |
ev_timer_stop (EV_A_ &once->to); |
2261 |
ev_free (once); |
2262 |
|
2263 |
cb (revents, arg); |
2264 |
} |
2265 |
|
2266 |
static void |
2267 |
once_cb_io (EV_P_ ev_io *w, int revents) |
2268 |
{ |
2269 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
2270 |
} |
2271 |
|
2272 |
static void |
2273 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
2274 |
{ |
2275 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
2276 |
} |
2277 |
|
2278 |
void |
2279 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
2280 |
{ |
2281 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
2282 |
|
2283 |
if (expect_false (!once)) |
2284 |
{ |
2285 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
2286 |
return; |
2287 |
} |
2288 |
|
2289 |
once->cb = cb; |
2290 |
once->arg = arg; |
2291 |
|
2292 |
ev_init (&once->io, once_cb_io); |
2293 |
if (fd >= 0) |
2294 |
{ |
2295 |
ev_io_set (&once->io, fd, events); |
2296 |
ev_io_start (EV_A_ &once->io); |
2297 |
} |
2298 |
|
2299 |
ev_init (&once->to, once_cb_to); |
2300 |
if (timeout >= 0.) |
2301 |
{ |
2302 |
ev_timer_set (&once->to, timeout, 0.); |
2303 |
ev_timer_start (EV_A_ &once->to); |
2304 |
} |
2305 |
} |
2306 |
|
2307 |
#ifdef __cplusplus |
2308 |
} |
2309 |
#endif |
2310 |
|