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/* |
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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 |
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|
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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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#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 */ |
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|
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#if __GNUC__ >= 3 |
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# define expect(expr,value) __builtin_expect ((expr),(value)) |
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# define noinline __attribute__ ((noinline)) |
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#else |
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# define expect(expr,value) (expr) |
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# define noinline |
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# if __STDC_VERSION__ < 199901L |
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# define inline |
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# endif |
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#endif |
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|
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#define expect_false(expr) expect ((expr) != 0, 0) |
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#define expect_true(expr) expect ((expr) != 0, 1) |
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#define inline_size static inline |
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|
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#if EV_MINIMAL |
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# define inline_speed static noinline |
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#else |
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# define inline_speed static inline |
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#endif |
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|
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#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
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|
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#define EMPTY /* required for microsofts broken pseudo-c compiler */ |
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#define EMPTY2(a,b) /* used to suppress some warnings */ |
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|
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typedef ev_watcher *W; |
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typedef ev_watcher_list *WL; |
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typedef ev_watcher_time *WT; |
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|
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static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
257 |
|
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#ifdef _WIN32 |
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# include "ev_win32.c" |
260 |
#endif |
261 |
|
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/*****************************************************************************/ |
263 |
|
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static void (*syserr_cb)(const char *msg); |
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|
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void |
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ev_set_syserr_cb (void (*cb)(const char *msg)) |
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{ |
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syserr_cb = cb; |
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} |
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|
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static void noinline |
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syserr (const char *msg) |
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{ |
275 |
if (!msg) |
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msg = "(libev) system error"; |
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|
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if (syserr_cb) |
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syserr_cb (msg); |
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else |
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{ |
282 |
perror (msg); |
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abort (); |
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} |
285 |
} |
286 |
|
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static void *(*alloc)(void *ptr, long size); |
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|
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void |
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ev_set_allocator (void *(*cb)(void *ptr, long size)) |
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{ |
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alloc = cb; |
293 |
} |
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|
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inline_speed void * |
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ev_realloc (void *ptr, long size) |
297 |
{ |
298 |
ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); |
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|
300 |
if (!ptr && size) |
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{ |
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fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
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abort (); |
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} |
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|
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return ptr; |
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} |
308 |
|
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#define ev_malloc(size) ev_realloc (0, (size)) |
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#define ev_free(ptr) ev_realloc ((ptr), 0) |
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|
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/*****************************************************************************/ |
313 |
|
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typedef struct |
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{ |
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WL head; |
317 |
unsigned char events; |
318 |
unsigned char reify; |
319 |
#if EV_SELECT_IS_WINSOCKET |
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SOCKET handle; |
321 |
#endif |
322 |
} ANFD; |
323 |
|
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typedef struct |
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{ |
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W w; |
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int events; |
328 |
} ANPENDING; |
329 |
|
330 |
#if EV_USE_INOTIFY |
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typedef struct |
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{ |
333 |
WL head; |
334 |
} ANFS; |
335 |
#endif |
336 |
|
337 |
#if EV_MULTIPLICITY |
338 |
|
339 |
struct ev_loop |
340 |
{ |
341 |
ev_tstamp ev_rt_now; |
342 |
#define ev_rt_now ((loop)->ev_rt_now) |
343 |
#define VAR(name,decl) decl; |
344 |
#include "ev_vars.h" |
345 |
#undef VAR |
346 |
}; |
347 |
#include "ev_wrap.h" |
348 |
|
349 |
static struct ev_loop default_loop_struct; |
350 |
struct ev_loop *ev_default_loop_ptr; |
351 |
|
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#else |
353 |
|
354 |
ev_tstamp ev_rt_now; |
355 |
#define VAR(name,decl) static decl; |
356 |
#include "ev_vars.h" |
357 |
#undef VAR |
358 |
|
359 |
static int ev_default_loop_ptr; |
360 |
|
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#endif |
362 |
|
363 |
/*****************************************************************************/ |
364 |
|
365 |
ev_tstamp |
366 |
ev_time (void) |
367 |
{ |
368 |
#if EV_USE_REALTIME |
369 |
struct timespec ts; |
370 |
clock_gettime (CLOCK_REALTIME, &ts); |
371 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
372 |
#else |
373 |
struct timeval tv; |
374 |
gettimeofday (&tv, 0); |
375 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
376 |
#endif |
377 |
} |
378 |
|
379 |
ev_tstamp inline_size |
380 |
get_clock (void) |
381 |
{ |
382 |
#if EV_USE_MONOTONIC |
383 |
if (expect_true (have_monotonic)) |
384 |
{ |
385 |
struct timespec ts; |
386 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
387 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
388 |
} |
389 |
#endif |
390 |
|
391 |
return ev_time (); |
392 |
} |
393 |
|
394 |
#if EV_MULTIPLICITY |
395 |
ev_tstamp |
396 |
ev_now (EV_P) |
397 |
{ |
398 |
return ev_rt_now; |
399 |
} |
400 |
#endif |
401 |
|
402 |
int inline_size |
403 |
array_nextsize (int elem, int cur, int cnt) |
404 |
{ |
405 |
int ncur = cur + 1; |
406 |
|
407 |
do |
408 |
ncur <<= 1; |
409 |
while (cnt > ncur); |
410 |
|
411 |
/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ |
412 |
if (elem * ncur > 4096) |
413 |
{ |
414 |
ncur *= elem; |
415 |
ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; |
416 |
ncur = ncur - sizeof (void *) * 4; |
417 |
ncur /= elem; |
418 |
} |
419 |
|
420 |
return ncur; |
421 |
} |
422 |
|
423 |
static noinline void * |
424 |
array_realloc (int elem, void *base, int *cur, int cnt) |
425 |
{ |
426 |
*cur = array_nextsize (elem, *cur, cnt); |
427 |
return ev_realloc (base, elem * *cur); |
428 |
} |
429 |
|
430 |
#define array_needsize(type,base,cur,cnt,init) \ |
431 |
if (expect_false ((cnt) > (cur))) \ |
432 |
{ \ |
433 |
int ocur_ = (cur); \ |
434 |
(base) = (type *)array_realloc \ |
435 |
(sizeof (type), (base), &(cur), (cnt)); \ |
436 |
init ((base) + (ocur_), (cur) - ocur_); \ |
437 |
} |
438 |
|
439 |
#if 0 |
440 |
#define array_slim(type,stem) \ |
441 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
442 |
{ \ |
443 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
444 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
445 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
446 |
} |
447 |
#endif |
448 |
|
449 |
#define array_free(stem, idx) \ |
450 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
451 |
|
452 |
/*****************************************************************************/ |
453 |
|
454 |
void noinline |
455 |
ev_feed_event (EV_P_ void *w, int revents) |
456 |
{ |
457 |
W w_ = (W)w; |
458 |
int pri = ABSPRI (w_); |
459 |
|
460 |
if (expect_false (w_->pending)) |
461 |
pendings [pri][w_->pending - 1].events |= revents; |
462 |
else |
463 |
{ |
464 |
w_->pending = ++pendingcnt [pri]; |
465 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
466 |
pendings [pri][w_->pending - 1].w = w_; |
467 |
pendings [pri][w_->pending - 1].events = revents; |
468 |
} |
469 |
} |
470 |
|
471 |
void inline_size |
472 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
473 |
{ |
474 |
int i; |
475 |
|
476 |
for (i = 0; i < eventcnt; ++i) |
477 |
ev_feed_event (EV_A_ events [i], type); |
478 |
} |
479 |
|
480 |
/*****************************************************************************/ |
481 |
|
482 |
void inline_size |
483 |
anfds_init (ANFD *base, int count) |
484 |
{ |
485 |
while (count--) |
486 |
{ |
487 |
base->head = 0; |
488 |
base->events = EV_NONE; |
489 |
base->reify = 0; |
490 |
|
491 |
++base; |
492 |
} |
493 |
} |
494 |
|
495 |
void inline_speed |
496 |
fd_event (EV_P_ int fd, int revents) |
497 |
{ |
498 |
ANFD *anfd = anfds + fd; |
499 |
ev_io *w; |
500 |
|
501 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
502 |
{ |
503 |
int ev = w->events & revents; |
504 |
|
505 |
if (ev) |
506 |
ev_feed_event (EV_A_ (W)w, ev); |
507 |
} |
508 |
} |
509 |
|
510 |
void |
511 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
512 |
{ |
513 |
if (fd >= 0 && fd < anfdmax) |
514 |
fd_event (EV_A_ fd, revents); |
515 |
} |
516 |
|
517 |
void inline_size |
518 |
fd_reify (EV_P) |
519 |
{ |
520 |
int i; |
521 |
|
522 |
for (i = 0; i < fdchangecnt; ++i) |
523 |
{ |
524 |
int fd = fdchanges [i]; |
525 |
ANFD *anfd = anfds + fd; |
526 |
ev_io *w; |
527 |
|
528 |
int events = 0; |
529 |
|
530 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
531 |
events |= w->events; |
532 |
|
533 |
#if EV_SELECT_IS_WINSOCKET |
534 |
if (events) |
535 |
{ |
536 |
unsigned long argp; |
537 |
anfd->handle = _get_osfhandle (fd); |
538 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
539 |
} |
540 |
#endif |
541 |
|
542 |
anfd->reify = 0; |
543 |
|
544 |
backend_modify (EV_A_ fd, anfd->events, events); |
545 |
anfd->events = events; |
546 |
} |
547 |
|
548 |
fdchangecnt = 0; |
549 |
} |
550 |
|
551 |
void inline_size |
552 |
fd_change (EV_P_ int fd) |
553 |
{ |
554 |
if (expect_false (anfds [fd].reify)) |
555 |
return; |
556 |
|
557 |
anfds [fd].reify = 1; |
558 |
|
559 |
++fdchangecnt; |
560 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
561 |
fdchanges [fdchangecnt - 1] = fd; |
562 |
} |
563 |
|
564 |
void inline_speed |
565 |
fd_kill (EV_P_ int fd) |
566 |
{ |
567 |
ev_io *w; |
568 |
|
569 |
while ((w = (ev_io *)anfds [fd].head)) |
570 |
{ |
571 |
ev_io_stop (EV_A_ w); |
572 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
573 |
} |
574 |
} |
575 |
|
576 |
int inline_size |
577 |
fd_valid (int fd) |
578 |
{ |
579 |
#ifdef _WIN32 |
580 |
return _get_osfhandle (fd) != -1; |
581 |
#else |
582 |
return fcntl (fd, F_GETFD) != -1; |
583 |
#endif |
584 |
} |
585 |
|
586 |
/* called on EBADF to verify fds */ |
587 |
static void noinline |
588 |
fd_ebadf (EV_P) |
589 |
{ |
590 |
int fd; |
591 |
|
592 |
for (fd = 0; fd < anfdmax; ++fd) |
593 |
if (anfds [fd].events) |
594 |
if (!fd_valid (fd) == -1 && errno == EBADF) |
595 |
fd_kill (EV_A_ fd); |
596 |
} |
597 |
|
598 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
599 |
static void noinline |
600 |
fd_enomem (EV_P) |
601 |
{ |
602 |
int fd; |
603 |
|
604 |
for (fd = anfdmax; fd--; ) |
605 |
if (anfds [fd].events) |
606 |
{ |
607 |
fd_kill (EV_A_ fd); |
608 |
return; |
609 |
} |
610 |
} |
611 |
|
612 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
613 |
static void noinline |
614 |
fd_rearm_all (EV_P) |
615 |
{ |
616 |
int fd; |
617 |
|
618 |
for (fd = 0; fd < anfdmax; ++fd) |
619 |
if (anfds [fd].events) |
620 |
{ |
621 |
anfds [fd].events = 0; |
622 |
fd_change (EV_A_ fd); |
623 |
} |
624 |
} |
625 |
|
626 |
/*****************************************************************************/ |
627 |
|
628 |
void inline_speed |
629 |
upheap (WT *heap, int k) |
630 |
{ |
631 |
WT w = heap [k]; |
632 |
|
633 |
while (k && heap [k >> 1]->at > w->at) |
634 |
{ |
635 |
heap [k] = heap [k >> 1]; |
636 |
((W)heap [k])->active = k + 1; |
637 |
k >>= 1; |
638 |
} |
639 |
|
640 |
heap [k] = w; |
641 |
((W)heap [k])->active = k + 1; |
642 |
|
643 |
} |
644 |
|
645 |
void inline_speed |
646 |
downheap (WT *heap, int N, int k) |
647 |
{ |
648 |
WT w = heap [k]; |
649 |
|
650 |
while (k < (N >> 1)) |
651 |
{ |
652 |
int j = k << 1; |
653 |
|
654 |
if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
655 |
++j; |
656 |
|
657 |
if (w->at <= heap [j]->at) |
658 |
break; |
659 |
|
660 |
heap [k] = heap [j]; |
661 |
((W)heap [k])->active = k + 1; |
662 |
k = j; |
663 |
} |
664 |
|
665 |
heap [k] = w; |
666 |
((W)heap [k])->active = k + 1; |
667 |
} |
668 |
|
669 |
void inline_size |
670 |
adjustheap (WT *heap, int N, int k) |
671 |
{ |
672 |
upheap (heap, k); |
673 |
downheap (heap, N, k); |
674 |
} |
675 |
|
676 |
/*****************************************************************************/ |
677 |
|
678 |
typedef struct |
679 |
{ |
680 |
WL head; |
681 |
sig_atomic_t volatile gotsig; |
682 |
} ANSIG; |
683 |
|
684 |
static ANSIG *signals; |
685 |
static int signalmax; |
686 |
|
687 |
static int sigpipe [2]; |
688 |
static sig_atomic_t volatile gotsig; |
689 |
static ev_io sigev; |
690 |
|
691 |
void inline_size |
692 |
signals_init (ANSIG *base, int count) |
693 |
{ |
694 |
while (count--) |
695 |
{ |
696 |
base->head = 0; |
697 |
base->gotsig = 0; |
698 |
|
699 |
++base; |
700 |
} |
701 |
} |
702 |
|
703 |
static void |
704 |
sighandler (int signum) |
705 |
{ |
706 |
#if _WIN32 |
707 |
signal (signum, sighandler); |
708 |
#endif |
709 |
|
710 |
signals [signum - 1].gotsig = 1; |
711 |
|
712 |
if (!gotsig) |
713 |
{ |
714 |
int old_errno = errno; |
715 |
gotsig = 1; |
716 |
write (sigpipe [1], &signum, 1); |
717 |
errno = old_errno; |
718 |
} |
719 |
} |
720 |
|
721 |
void noinline |
722 |
ev_feed_signal_event (EV_P_ int signum) |
723 |
{ |
724 |
WL w; |
725 |
|
726 |
#if EV_MULTIPLICITY |
727 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
728 |
#endif |
729 |
|
730 |
--signum; |
731 |
|
732 |
if (signum < 0 || signum >= signalmax) |
733 |
return; |
734 |
|
735 |
signals [signum].gotsig = 0; |
736 |
|
737 |
for (w = signals [signum].head; w; w = w->next) |
738 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
739 |
} |
740 |
|
741 |
static void |
742 |
sigcb (EV_P_ ev_io *iow, int revents) |
743 |
{ |
744 |
int signum; |
745 |
|
746 |
read (sigpipe [0], &revents, 1); |
747 |
gotsig = 0; |
748 |
|
749 |
for (signum = signalmax; signum--; ) |
750 |
if (signals [signum].gotsig) |
751 |
ev_feed_signal_event (EV_A_ signum + 1); |
752 |
} |
753 |
|
754 |
void inline_speed |
755 |
fd_intern (int fd) |
756 |
{ |
757 |
#ifdef _WIN32 |
758 |
int arg = 1; |
759 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
760 |
#else |
761 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
762 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
763 |
#endif |
764 |
} |
765 |
|
766 |
static void noinline |
767 |
siginit (EV_P) |
768 |
{ |
769 |
fd_intern (sigpipe [0]); |
770 |
fd_intern (sigpipe [1]); |
771 |
|
772 |
ev_io_set (&sigev, sigpipe [0], EV_READ); |
773 |
ev_io_start (EV_A_ &sigev); |
774 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
775 |
} |
776 |
|
777 |
/*****************************************************************************/ |
778 |
|
779 |
static ev_child *childs [EV_PID_HASHSIZE]; |
780 |
|
781 |
#ifndef _WIN32 |
782 |
|
783 |
static ev_signal childev; |
784 |
|
785 |
void inline_speed |
786 |
child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) |
787 |
{ |
788 |
ev_child *w; |
789 |
|
790 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
791 |
if (w->pid == pid || !w->pid) |
792 |
{ |
793 |
ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ |
794 |
w->rpid = pid; |
795 |
w->rstatus = status; |
796 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
797 |
} |
798 |
} |
799 |
|
800 |
#ifndef WCONTINUED |
801 |
# define WCONTINUED 0 |
802 |
#endif |
803 |
|
804 |
static void |
805 |
childcb (EV_P_ ev_signal *sw, int revents) |
806 |
{ |
807 |
int pid, status; |
808 |
|
809 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
810 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
811 |
if (!WCONTINUED |
812 |
|| errno != EINVAL |
813 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
814 |
return; |
815 |
|
816 |
/* make sure we are called again until all childs have been reaped */ |
817 |
/* we need to do it this way so that the callback gets called before we continue */ |
818 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
819 |
|
820 |
child_reap (EV_A_ sw, pid, pid, status); |
821 |
if (EV_PID_HASHSIZE > 1) |
822 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
823 |
} |
824 |
|
825 |
#endif |
826 |
|
827 |
/*****************************************************************************/ |
828 |
|
829 |
#if EV_USE_PORT |
830 |
# include "ev_port.c" |
831 |
#endif |
832 |
#if EV_USE_KQUEUE |
833 |
# include "ev_kqueue.c" |
834 |
#endif |
835 |
#if EV_USE_EPOLL |
836 |
# include "ev_epoll.c" |
837 |
#endif |
838 |
#if EV_USE_POLL |
839 |
# include "ev_poll.c" |
840 |
#endif |
841 |
#if EV_USE_SELECT |
842 |
# include "ev_select.c" |
843 |
#endif |
844 |
|
845 |
int |
846 |
ev_version_major (void) |
847 |
{ |
848 |
return EV_VERSION_MAJOR; |
849 |
} |
850 |
|
851 |
int |
852 |
ev_version_minor (void) |
853 |
{ |
854 |
return EV_VERSION_MINOR; |
855 |
} |
856 |
|
857 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
858 |
int inline_size |
859 |
enable_secure (void) |
860 |
{ |
861 |
#ifdef _WIN32 |
862 |
return 0; |
863 |
#else |
864 |
return getuid () != geteuid () |
865 |
|| getgid () != getegid (); |
866 |
#endif |
867 |
} |
868 |
|
869 |
unsigned int |
870 |
ev_supported_backends (void) |
871 |
{ |
872 |
unsigned int flags = 0; |
873 |
|
874 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
875 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
876 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
877 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
878 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
879 |
|
880 |
return flags; |
881 |
} |
882 |
|
883 |
unsigned int |
884 |
ev_recommended_backends (void) |
885 |
{ |
886 |
unsigned int flags = ev_supported_backends (); |
887 |
|
888 |
#ifndef __NetBSD__ |
889 |
/* kqueue is borked on everything but netbsd apparently */ |
890 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
891 |
flags &= ~EVBACKEND_KQUEUE; |
892 |
#endif |
893 |
#ifdef __APPLE__ |
894 |
// flags &= ~EVBACKEND_KQUEUE; for documentation |
895 |
flags &= ~EVBACKEND_POLL; |
896 |
#endif |
897 |
|
898 |
return flags; |
899 |
} |
900 |
|
901 |
unsigned int |
902 |
ev_embeddable_backends (void) |
903 |
{ |
904 |
return EVBACKEND_EPOLL |
905 |
| EVBACKEND_KQUEUE |
906 |
| EVBACKEND_PORT; |
907 |
} |
908 |
|
909 |
unsigned int |
910 |
ev_backend (EV_P) |
911 |
{ |
912 |
return backend; |
913 |
} |
914 |
|
915 |
unsigned int |
916 |
ev_loop_count (EV_P) |
917 |
{ |
918 |
return loop_count; |
919 |
} |
920 |
|
921 |
static void noinline |
922 |
loop_init (EV_P_ unsigned int flags) |
923 |
{ |
924 |
if (!backend) |
925 |
{ |
926 |
#if EV_USE_MONOTONIC |
927 |
{ |
928 |
struct timespec ts; |
929 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
930 |
have_monotonic = 1; |
931 |
} |
932 |
#endif |
933 |
|
934 |
ev_rt_now = ev_time (); |
935 |
mn_now = get_clock (); |
936 |
now_floor = mn_now; |
937 |
rtmn_diff = ev_rt_now - mn_now; |
938 |
|
939 |
/* pid check not overridable via env */ |
940 |
#ifndef _WIN32 |
941 |
if (flags & EVFLAG_FORKCHECK) |
942 |
curpid = getpid (); |
943 |
#endif |
944 |
|
945 |
if (!(flags & EVFLAG_NOENV) |
946 |
&& !enable_secure () |
947 |
&& getenv ("LIBEV_FLAGS")) |
948 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
949 |
|
950 |
if (!(flags & 0x0000ffffUL)) |
951 |
flags |= ev_recommended_backends (); |
952 |
|
953 |
backend = 0; |
954 |
backend_fd = -1; |
955 |
#if EV_USE_INOTIFY |
956 |
fs_fd = -2; |
957 |
#endif |
958 |
|
959 |
#if EV_USE_PORT |
960 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
961 |
#endif |
962 |
#if EV_USE_KQUEUE |
963 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
964 |
#endif |
965 |
#if EV_USE_EPOLL |
966 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
967 |
#endif |
968 |
#if EV_USE_POLL |
969 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
970 |
#endif |
971 |
#if EV_USE_SELECT |
972 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
973 |
#endif |
974 |
|
975 |
ev_init (&sigev, sigcb); |
976 |
ev_set_priority (&sigev, EV_MAXPRI); |
977 |
} |
978 |
} |
979 |
|
980 |
static void noinline |
981 |
loop_destroy (EV_P) |
982 |
{ |
983 |
int i; |
984 |
|
985 |
#if EV_USE_INOTIFY |
986 |
if (fs_fd >= 0) |
987 |
close (fs_fd); |
988 |
#endif |
989 |
|
990 |
if (backend_fd >= 0) |
991 |
close (backend_fd); |
992 |
|
993 |
#if EV_USE_PORT |
994 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
995 |
#endif |
996 |
#if EV_USE_KQUEUE |
997 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
998 |
#endif |
999 |
#if EV_USE_EPOLL |
1000 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1001 |
#endif |
1002 |
#if EV_USE_POLL |
1003 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1004 |
#endif |
1005 |
#if EV_USE_SELECT |
1006 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1007 |
#endif |
1008 |
|
1009 |
for (i = NUMPRI; i--; ) |
1010 |
{ |
1011 |
array_free (pending, [i]); |
1012 |
#if EV_IDLE_ENABLE |
1013 |
array_free (idle, [i]); |
1014 |
#endif |
1015 |
} |
1016 |
|
1017 |
/* have to use the microsoft-never-gets-it-right macro */ |
1018 |
array_free (fdchange, EMPTY); |
1019 |
array_free (timer, EMPTY); |
1020 |
#if EV_PERIODIC_ENABLE |
1021 |
array_free (periodic, EMPTY); |
1022 |
#endif |
1023 |
array_free (prepare, EMPTY); |
1024 |
array_free (check, EMPTY); |
1025 |
|
1026 |
backend = 0; |
1027 |
} |
1028 |
|
1029 |
void inline_size infy_fork (EV_P); |
1030 |
|
1031 |
void inline_size |
1032 |
loop_fork (EV_P) |
1033 |
{ |
1034 |
#if EV_USE_PORT |
1035 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1036 |
#endif |
1037 |
#if EV_USE_KQUEUE |
1038 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1039 |
#endif |
1040 |
#if EV_USE_EPOLL |
1041 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1042 |
#endif |
1043 |
#if EV_USE_INOTIFY |
1044 |
infy_fork (EV_A); |
1045 |
#endif |
1046 |
|
1047 |
if (ev_is_active (&sigev)) |
1048 |
{ |
1049 |
/* default loop */ |
1050 |
|
1051 |
ev_ref (EV_A); |
1052 |
ev_io_stop (EV_A_ &sigev); |
1053 |
close (sigpipe [0]); |
1054 |
close (sigpipe [1]); |
1055 |
|
1056 |
while (pipe (sigpipe)) |
1057 |
syserr ("(libev) error creating pipe"); |
1058 |
|
1059 |
siginit (EV_A); |
1060 |
} |
1061 |
|
1062 |
postfork = 0; |
1063 |
} |
1064 |
|
1065 |
#if EV_MULTIPLICITY |
1066 |
struct ev_loop * |
1067 |
ev_loop_new (unsigned int flags) |
1068 |
{ |
1069 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1070 |
|
1071 |
memset (loop, 0, sizeof (struct ev_loop)); |
1072 |
|
1073 |
loop_init (EV_A_ flags); |
1074 |
|
1075 |
if (ev_backend (EV_A)) |
1076 |
return loop; |
1077 |
|
1078 |
return 0; |
1079 |
} |
1080 |
|
1081 |
void |
1082 |
ev_loop_destroy (EV_P) |
1083 |
{ |
1084 |
loop_destroy (EV_A); |
1085 |
ev_free (loop); |
1086 |
} |
1087 |
|
1088 |
void |
1089 |
ev_loop_fork (EV_P) |
1090 |
{ |
1091 |
postfork = 1; |
1092 |
} |
1093 |
|
1094 |
#endif |
1095 |
|
1096 |
#if EV_MULTIPLICITY |
1097 |
struct ev_loop * |
1098 |
ev_default_loop_init (unsigned int flags) |
1099 |
#else |
1100 |
int |
1101 |
ev_default_loop (unsigned int flags) |
1102 |
#endif |
1103 |
{ |
1104 |
if (sigpipe [0] == sigpipe [1]) |
1105 |
if (pipe (sigpipe)) |
1106 |
return 0; |
1107 |
|
1108 |
if (!ev_default_loop_ptr) |
1109 |
{ |
1110 |
#if EV_MULTIPLICITY |
1111 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
1112 |
#else |
1113 |
ev_default_loop_ptr = 1; |
1114 |
#endif |
1115 |
|
1116 |
loop_init (EV_A_ flags); |
1117 |
|
1118 |
if (ev_backend (EV_A)) |
1119 |
{ |
1120 |
siginit (EV_A); |
1121 |
|
1122 |
#ifndef _WIN32 |
1123 |
ev_signal_init (&childev, childcb, SIGCHLD); |
1124 |
ev_set_priority (&childev, EV_MAXPRI); |
1125 |
ev_signal_start (EV_A_ &childev); |
1126 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
1127 |
#endif |
1128 |
} |
1129 |
else |
1130 |
ev_default_loop_ptr = 0; |
1131 |
} |
1132 |
|
1133 |
return ev_default_loop_ptr; |
1134 |
} |
1135 |
|
1136 |
void |
1137 |
ev_default_destroy (void) |
1138 |
{ |
1139 |
#if EV_MULTIPLICITY |
1140 |
struct ev_loop *loop = ev_default_loop_ptr; |
1141 |
#endif |
1142 |
|
1143 |
#ifndef _WIN32 |
1144 |
ev_ref (EV_A); /* child watcher */ |
1145 |
ev_signal_stop (EV_A_ &childev); |
1146 |
#endif |
1147 |
|
1148 |
ev_ref (EV_A); /* signal watcher */ |
1149 |
ev_io_stop (EV_A_ &sigev); |
1150 |
|
1151 |
close (sigpipe [0]); sigpipe [0] = 0; |
1152 |
close (sigpipe [1]); sigpipe [1] = 0; |
1153 |
|
1154 |
loop_destroy (EV_A); |
1155 |
} |
1156 |
|
1157 |
void |
1158 |
ev_default_fork (void) |
1159 |
{ |
1160 |
#if EV_MULTIPLICITY |
1161 |
struct ev_loop *loop = ev_default_loop_ptr; |
1162 |
#endif |
1163 |
|
1164 |
if (backend) |
1165 |
postfork = 1; |
1166 |
} |
1167 |
|
1168 |
/*****************************************************************************/ |
1169 |
|
1170 |
void |
1171 |
ev_invoke (EV_P_ void *w, int revents) |
1172 |
{ |
1173 |
EV_CB_INVOKE ((W)w, revents); |
1174 |
} |
1175 |
|
1176 |
void inline_speed |
1177 |
call_pending (EV_P) |
1178 |
{ |
1179 |
int pri; |
1180 |
|
1181 |
for (pri = NUMPRI; pri--; ) |
1182 |
while (pendingcnt [pri]) |
1183 |
{ |
1184 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1185 |
|
1186 |
if (expect_true (p->w)) |
1187 |
{ |
1188 |
/*assert (("non-pending watcher on pending list", p->w->pending));*/ |
1189 |
|
1190 |
p->w->pending = 0; |
1191 |
EV_CB_INVOKE (p->w, p->events); |
1192 |
} |
1193 |
} |
1194 |
} |
1195 |
|
1196 |
void inline_size |
1197 |
timers_reify (EV_P) |
1198 |
{ |
1199 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
1200 |
{ |
1201 |
ev_timer *w = timers [0]; |
1202 |
|
1203 |
/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ |
1204 |
|
1205 |
/* first reschedule or stop timer */ |
1206 |
if (w->repeat) |
1207 |
{ |
1208 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1209 |
|
1210 |
((WT)w)->at += w->repeat; |
1211 |
if (((WT)w)->at < mn_now) |
1212 |
((WT)w)->at = mn_now; |
1213 |
|
1214 |
downheap ((WT *)timers, timercnt, 0); |
1215 |
} |
1216 |
else |
1217 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1218 |
|
1219 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
1220 |
} |
1221 |
} |
1222 |
|
1223 |
#if EV_PERIODIC_ENABLE |
1224 |
void inline_size |
1225 |
periodics_reify (EV_P) |
1226 |
{ |
1227 |
while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
1228 |
{ |
1229 |
ev_periodic *w = periodics [0]; |
1230 |
|
1231 |
/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ |
1232 |
|
1233 |
/* first reschedule or stop timer */ |
1234 |
if (w->reschedule_cb) |
1235 |
{ |
1236 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); |
1237 |
assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
1238 |
downheap ((WT *)periodics, periodiccnt, 0); |
1239 |
} |
1240 |
else if (w->interval) |
1241 |
{ |
1242 |
((WT)w)->at = w->offset + floor ((ev_rt_now - w->offset) / w->interval + 1.) * w->interval; |
1243 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
1244 |
downheap ((WT *)periodics, periodiccnt, 0); |
1245 |
} |
1246 |
else |
1247 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1248 |
|
1249 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
1250 |
} |
1251 |
} |
1252 |
|
1253 |
static void noinline |
1254 |
periodics_reschedule (EV_P) |
1255 |
{ |
1256 |
int i; |
1257 |
|
1258 |
/* adjust periodics after time jump */ |
1259 |
for (i = 0; i < periodiccnt; ++i) |
1260 |
{ |
1261 |
ev_periodic *w = periodics [i]; |
1262 |
|
1263 |
if (w->reschedule_cb) |
1264 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1265 |
else if (w->interval) |
1266 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1267 |
} |
1268 |
|
1269 |
/* now rebuild the heap */ |
1270 |
for (i = periodiccnt >> 1; i--; ) |
1271 |
downheap ((WT *)periodics, periodiccnt, i); |
1272 |
} |
1273 |
#endif |
1274 |
|
1275 |
#if EV_IDLE_ENABLE |
1276 |
void inline_size |
1277 |
idle_reify (EV_P) |
1278 |
{ |
1279 |
if (expect_false (idleall)) |
1280 |
{ |
1281 |
int pri; |
1282 |
|
1283 |
for (pri = NUMPRI; pri--; ) |
1284 |
{ |
1285 |
if (pendingcnt [pri]) |
1286 |
break; |
1287 |
|
1288 |
if (idlecnt [pri]) |
1289 |
{ |
1290 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
1291 |
break; |
1292 |
} |
1293 |
} |
1294 |
} |
1295 |
} |
1296 |
#endif |
1297 |
|
1298 |
int inline_size |
1299 |
time_update_monotonic (EV_P) |
1300 |
{ |
1301 |
mn_now = get_clock (); |
1302 |
|
1303 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
1304 |
{ |
1305 |
ev_rt_now = rtmn_diff + mn_now; |
1306 |
return 0; |
1307 |
} |
1308 |
else |
1309 |
{ |
1310 |
now_floor = mn_now; |
1311 |
ev_rt_now = ev_time (); |
1312 |
return 1; |
1313 |
} |
1314 |
} |
1315 |
|
1316 |
void inline_size |
1317 |
time_update (EV_P) |
1318 |
{ |
1319 |
int i; |
1320 |
|
1321 |
#if EV_USE_MONOTONIC |
1322 |
if (expect_true (have_monotonic)) |
1323 |
{ |
1324 |
if (time_update_monotonic (EV_A)) |
1325 |
{ |
1326 |
ev_tstamp odiff = rtmn_diff; |
1327 |
|
1328 |
/* loop a few times, before making important decisions. |
1329 |
* on the choice of "4": one iteration isn't enough, |
1330 |
* in case we get preempted during the calls to |
1331 |
* ev_time and get_clock. a second call is almost guaranteed |
1332 |
* to succeed in that case, though. and looping a few more times |
1333 |
* doesn't hurt either as we only do this on time-jumps or |
1334 |
* in the unlikely event of having been preempted here. |
1335 |
*/ |
1336 |
for (i = 4; --i; ) |
1337 |
{ |
1338 |
rtmn_diff = ev_rt_now - mn_now; |
1339 |
|
1340 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
1341 |
return; /* all is well */ |
1342 |
|
1343 |
ev_rt_now = ev_time (); |
1344 |
mn_now = get_clock (); |
1345 |
now_floor = mn_now; |
1346 |
} |
1347 |
|
1348 |
# if EV_PERIODIC_ENABLE |
1349 |
periodics_reschedule (EV_A); |
1350 |
# endif |
1351 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
1352 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
1353 |
} |
1354 |
} |
1355 |
else |
1356 |
#endif |
1357 |
{ |
1358 |
ev_rt_now = ev_time (); |
1359 |
|
1360 |
if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
1361 |
{ |
1362 |
#if EV_PERIODIC_ENABLE |
1363 |
periodics_reschedule (EV_A); |
1364 |
#endif |
1365 |
|
1366 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
1367 |
for (i = 0; i < timercnt; ++i) |
1368 |
((WT)timers [i])->at += ev_rt_now - mn_now; |
1369 |
} |
1370 |
|
1371 |
mn_now = ev_rt_now; |
1372 |
} |
1373 |
} |
1374 |
|
1375 |
void |
1376 |
ev_ref (EV_P) |
1377 |
{ |
1378 |
++activecnt; |
1379 |
} |
1380 |
|
1381 |
void |
1382 |
ev_unref (EV_P) |
1383 |
{ |
1384 |
--activecnt; |
1385 |
} |
1386 |
|
1387 |
static int loop_done; |
1388 |
|
1389 |
void |
1390 |
ev_loop (EV_P_ int flags) |
1391 |
{ |
1392 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) |
1393 |
? EVUNLOOP_ONE |
1394 |
: EVUNLOOP_CANCEL; |
1395 |
|
1396 |
call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ |
1397 |
|
1398 |
do |
1399 |
{ |
1400 |
#ifndef _WIN32 |
1401 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
1402 |
if (expect_false (getpid () != curpid)) |
1403 |
{ |
1404 |
curpid = getpid (); |
1405 |
postfork = 1; |
1406 |
} |
1407 |
#endif |
1408 |
|
1409 |
#if EV_FORK_ENABLE |
1410 |
/* we might have forked, so queue fork handlers */ |
1411 |
if (expect_false (postfork)) |
1412 |
if (forkcnt) |
1413 |
{ |
1414 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
1415 |
call_pending (EV_A); |
1416 |
} |
1417 |
#endif |
1418 |
|
1419 |
/* queue prepare watchers (and execute them) */ |
1420 |
if (expect_false (preparecnt)) |
1421 |
{ |
1422 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
1423 |
call_pending (EV_A); |
1424 |
} |
1425 |
|
1426 |
if (expect_false (!activecnt)) |
1427 |
break; |
1428 |
|
1429 |
/* we might have forked, so reify kernel state if necessary */ |
1430 |
if (expect_false (postfork)) |
1431 |
loop_fork (EV_A); |
1432 |
|
1433 |
/* update fd-related kernel structures */ |
1434 |
fd_reify (EV_A); |
1435 |
|
1436 |
/* calculate blocking time */ |
1437 |
{ |
1438 |
ev_tstamp block; |
1439 |
|
1440 |
if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) |
1441 |
block = 0.; /* do not block at all */ |
1442 |
else |
1443 |
{ |
1444 |
/* update time to cancel out callback processing overhead */ |
1445 |
#if EV_USE_MONOTONIC |
1446 |
if (expect_true (have_monotonic)) |
1447 |
time_update_monotonic (EV_A); |
1448 |
else |
1449 |
#endif |
1450 |
{ |
1451 |
ev_rt_now = ev_time (); |
1452 |
mn_now = ev_rt_now; |
1453 |
} |
1454 |
|
1455 |
block = MAX_BLOCKTIME; |
1456 |
|
1457 |
if (timercnt) |
1458 |
{ |
1459 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; |
1460 |
if (block > to) block = to; |
1461 |
} |
1462 |
|
1463 |
#if EV_PERIODIC_ENABLE |
1464 |
if (periodiccnt) |
1465 |
{ |
1466 |
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; |
1467 |
if (block > to) block = to; |
1468 |
} |
1469 |
#endif |
1470 |
|
1471 |
if (expect_false (block < 0.)) block = 0.; |
1472 |
} |
1473 |
|
1474 |
++loop_count; |
1475 |
backend_poll (EV_A_ block); |
1476 |
} |
1477 |
|
1478 |
/* update ev_rt_now, do magic */ |
1479 |
time_update (EV_A); |
1480 |
|
1481 |
/* queue pending timers and reschedule them */ |
1482 |
timers_reify (EV_A); /* relative timers called last */ |
1483 |
#if EV_PERIODIC_ENABLE |
1484 |
periodics_reify (EV_A); /* absolute timers called first */ |
1485 |
#endif |
1486 |
|
1487 |
#if EV_IDLE_ENABLE |
1488 |
/* queue idle watchers unless other events are pending */ |
1489 |
idle_reify (EV_A); |
1490 |
#endif |
1491 |
|
1492 |
/* queue check watchers, to be executed first */ |
1493 |
if (expect_false (checkcnt)) |
1494 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
1495 |
|
1496 |
call_pending (EV_A); |
1497 |
|
1498 |
} |
1499 |
while (expect_true (activecnt && !loop_done)); |
1500 |
|
1501 |
if (loop_done == EVUNLOOP_ONE) |
1502 |
loop_done = EVUNLOOP_CANCEL; |
1503 |
} |
1504 |
|
1505 |
void |
1506 |
ev_unloop (EV_P_ int how) |
1507 |
{ |
1508 |
loop_done = how; |
1509 |
} |
1510 |
|
1511 |
/*****************************************************************************/ |
1512 |
|
1513 |
void inline_size |
1514 |
wlist_add (WL *head, WL elem) |
1515 |
{ |
1516 |
elem->next = *head; |
1517 |
*head = elem; |
1518 |
} |
1519 |
|
1520 |
void inline_size |
1521 |
wlist_del (WL *head, WL elem) |
1522 |
{ |
1523 |
while (*head) |
1524 |
{ |
1525 |
if (*head == elem) |
1526 |
{ |
1527 |
*head = elem->next; |
1528 |
return; |
1529 |
} |
1530 |
|
1531 |
head = &(*head)->next; |
1532 |
} |
1533 |
} |
1534 |
|
1535 |
void inline_speed |
1536 |
clear_pending (EV_P_ W w) |
1537 |
{ |
1538 |
if (w->pending) |
1539 |
{ |
1540 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
1541 |
w->pending = 0; |
1542 |
} |
1543 |
} |
1544 |
|
1545 |
int |
1546 |
ev_clear_pending (EV_P_ void *w) |
1547 |
{ |
1548 |
W w_ = (W)w; |
1549 |
int pending = w_->pending; |
1550 |
|
1551 |
if (expect_true (pending)) |
1552 |
{ |
1553 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
1554 |
w_->pending = 0; |
1555 |
p->w = 0; |
1556 |
return p->events; |
1557 |
} |
1558 |
else |
1559 |
return 0; |
1560 |
} |
1561 |
|
1562 |
void inline_size |
1563 |
pri_adjust (EV_P_ W w) |
1564 |
{ |
1565 |
int pri = w->priority; |
1566 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
1567 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
1568 |
w->priority = pri; |
1569 |
} |
1570 |
|
1571 |
void inline_speed |
1572 |
ev_start (EV_P_ W w, int active) |
1573 |
{ |
1574 |
pri_adjust (EV_A_ w); |
1575 |
w->active = active; |
1576 |
ev_ref (EV_A); |
1577 |
} |
1578 |
|
1579 |
void inline_size |
1580 |
ev_stop (EV_P_ W w) |
1581 |
{ |
1582 |
ev_unref (EV_A); |
1583 |
w->active = 0; |
1584 |
} |
1585 |
|
1586 |
/*****************************************************************************/ |
1587 |
|
1588 |
void noinline |
1589 |
ev_io_start (EV_P_ ev_io *w) |
1590 |
{ |
1591 |
int fd = w->fd; |
1592 |
|
1593 |
if (expect_false (ev_is_active (w))) |
1594 |
return; |
1595 |
|
1596 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
1597 |
|
1598 |
ev_start (EV_A_ (W)w, 1); |
1599 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
1600 |
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
1601 |
|
1602 |
fd_change (EV_A_ fd); |
1603 |
} |
1604 |
|
1605 |
void noinline |
1606 |
ev_io_stop (EV_P_ ev_io *w) |
1607 |
{ |
1608 |
clear_pending (EV_A_ (W)w); |
1609 |
if (expect_false (!ev_is_active (w))) |
1610 |
return; |
1611 |
|
1612 |
assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
1613 |
|
1614 |
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
1615 |
ev_stop (EV_A_ (W)w); |
1616 |
|
1617 |
fd_change (EV_A_ w->fd); |
1618 |
} |
1619 |
|
1620 |
void noinline |
1621 |
ev_timer_start (EV_P_ ev_timer *w) |
1622 |
{ |
1623 |
if (expect_false (ev_is_active (w))) |
1624 |
return; |
1625 |
|
1626 |
((WT)w)->at += mn_now; |
1627 |
|
1628 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
1629 |
|
1630 |
ev_start (EV_A_ (W)w, ++timercnt); |
1631 |
array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); |
1632 |
timers [timercnt - 1] = w; |
1633 |
upheap ((WT *)timers, timercnt - 1); |
1634 |
|
1635 |
/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ |
1636 |
} |
1637 |
|
1638 |
void noinline |
1639 |
ev_timer_stop (EV_P_ ev_timer *w) |
1640 |
{ |
1641 |
clear_pending (EV_A_ (W)w); |
1642 |
if (expect_false (!ev_is_active (w))) |
1643 |
return; |
1644 |
|
1645 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
1646 |
|
1647 |
{ |
1648 |
int active = ((W)w)->active; |
1649 |
|
1650 |
if (expect_true (--active < --timercnt)) |
1651 |
{ |
1652 |
timers [active] = timers [timercnt]; |
1653 |
adjustheap ((WT *)timers, timercnt, active); |
1654 |
} |
1655 |
} |
1656 |
|
1657 |
((WT)w)->at -= mn_now; |
1658 |
|
1659 |
ev_stop (EV_A_ (W)w); |
1660 |
} |
1661 |
|
1662 |
void noinline |
1663 |
ev_timer_again (EV_P_ ev_timer *w) |
1664 |
{ |
1665 |
if (ev_is_active (w)) |
1666 |
{ |
1667 |
if (w->repeat) |
1668 |
{ |
1669 |
((WT)w)->at = mn_now + w->repeat; |
1670 |
adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
1671 |
} |
1672 |
else |
1673 |
ev_timer_stop (EV_A_ w); |
1674 |
} |
1675 |
else if (w->repeat) |
1676 |
{ |
1677 |
w->at = w->repeat; |
1678 |
ev_timer_start (EV_A_ w); |
1679 |
} |
1680 |
} |
1681 |
|
1682 |
#if EV_PERIODIC_ENABLE |
1683 |
void noinline |
1684 |
ev_periodic_start (EV_P_ ev_periodic *w) |
1685 |
{ |
1686 |
if (expect_false (ev_is_active (w))) |
1687 |
return; |
1688 |
|
1689 |
if (w->reschedule_cb) |
1690 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1691 |
else if (w->interval) |
1692 |
{ |
1693 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
1694 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
1695 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1696 |
} |
1697 |
else |
1698 |
((WT)w)->at = w->offset; |
1699 |
|
1700 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
1701 |
array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); |
1702 |
periodics [periodiccnt - 1] = w; |
1703 |
upheap ((WT *)periodics, periodiccnt - 1); |
1704 |
|
1705 |
/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ |
1706 |
} |
1707 |
|
1708 |
void noinline |
1709 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
1710 |
{ |
1711 |
clear_pending (EV_A_ (W)w); |
1712 |
if (expect_false (!ev_is_active (w))) |
1713 |
return; |
1714 |
|
1715 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
1716 |
|
1717 |
{ |
1718 |
int active = ((W)w)->active; |
1719 |
|
1720 |
if (expect_true (--active < --periodiccnt)) |
1721 |
{ |
1722 |
periodics [active] = periodics [periodiccnt]; |
1723 |
adjustheap ((WT *)periodics, periodiccnt, active); |
1724 |
} |
1725 |
} |
1726 |
|
1727 |
ev_stop (EV_A_ (W)w); |
1728 |
} |
1729 |
|
1730 |
void noinline |
1731 |
ev_periodic_again (EV_P_ ev_periodic *w) |
1732 |
{ |
1733 |
/* TODO: use adjustheap and recalculation */ |
1734 |
ev_periodic_stop (EV_A_ w); |
1735 |
ev_periodic_start (EV_A_ w); |
1736 |
} |
1737 |
#endif |
1738 |
|
1739 |
#ifndef SA_RESTART |
1740 |
# define SA_RESTART 0 |
1741 |
#endif |
1742 |
|
1743 |
void noinline |
1744 |
ev_signal_start (EV_P_ ev_signal *w) |
1745 |
{ |
1746 |
#if EV_MULTIPLICITY |
1747 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1748 |
#endif |
1749 |
if (expect_false (ev_is_active (w))) |
1750 |
return; |
1751 |
|
1752 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
1753 |
|
1754 |
ev_start (EV_A_ (W)w, 1); |
1755 |
array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
1756 |
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1757 |
|
1758 |
if (!((WL)w)->next) |
1759 |
{ |
1760 |
#if _WIN32 |
1761 |
signal (w->signum, sighandler); |
1762 |
#else |
1763 |
struct sigaction sa; |
1764 |
sa.sa_handler = sighandler; |
1765 |
sigfillset (&sa.sa_mask); |
1766 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
1767 |
sigaction (w->signum, &sa, 0); |
1768 |
#endif |
1769 |
} |
1770 |
} |
1771 |
|
1772 |
void noinline |
1773 |
ev_signal_stop (EV_P_ ev_signal *w) |
1774 |
{ |
1775 |
clear_pending (EV_A_ (W)w); |
1776 |
if (expect_false (!ev_is_active (w))) |
1777 |
return; |
1778 |
|
1779 |
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1780 |
ev_stop (EV_A_ (W)w); |
1781 |
|
1782 |
if (!signals [w->signum - 1].head) |
1783 |
signal (w->signum, SIG_DFL); |
1784 |
} |
1785 |
|
1786 |
void |
1787 |
ev_child_start (EV_P_ ev_child *w) |
1788 |
{ |
1789 |
#if EV_MULTIPLICITY |
1790 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1791 |
#endif |
1792 |
if (expect_false (ev_is_active (w))) |
1793 |
return; |
1794 |
|
1795 |
ev_start (EV_A_ (W)w, 1); |
1796 |
wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1797 |
} |
1798 |
|
1799 |
void |
1800 |
ev_child_stop (EV_P_ ev_child *w) |
1801 |
{ |
1802 |
clear_pending (EV_A_ (W)w); |
1803 |
if (expect_false (!ev_is_active (w))) |
1804 |
return; |
1805 |
|
1806 |
wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1807 |
ev_stop (EV_A_ (W)w); |
1808 |
} |
1809 |
|
1810 |
#if EV_STAT_ENABLE |
1811 |
|
1812 |
# ifdef _WIN32 |
1813 |
# undef lstat |
1814 |
# define lstat(a,b) _stati64 (a,b) |
1815 |
# endif |
1816 |
|
1817 |
#define DEF_STAT_INTERVAL 5.0074891 |
1818 |
#define MIN_STAT_INTERVAL 0.1074891 |
1819 |
|
1820 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
1821 |
|
1822 |
#if EV_USE_INOTIFY |
1823 |
# define EV_INOTIFY_BUFSIZE 8192 |
1824 |
|
1825 |
static void noinline |
1826 |
infy_add (EV_P_ ev_stat *w) |
1827 |
{ |
1828 |
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); |
1829 |
|
1830 |
if (w->wd < 0) |
1831 |
{ |
1832 |
ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
1833 |
|
1834 |
/* monitor some parent directory for speedup hints */ |
1835 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
1836 |
{ |
1837 |
char path [4096]; |
1838 |
strcpy (path, w->path); |
1839 |
|
1840 |
do |
1841 |
{ |
1842 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
1843 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
1844 |
|
1845 |
char *pend = strrchr (path, '/'); |
1846 |
|
1847 |
if (!pend) |
1848 |
break; /* whoops, no '/', complain to your admin */ |
1849 |
|
1850 |
*pend = 0; |
1851 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
1852 |
} |
1853 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
1854 |
} |
1855 |
} |
1856 |
else |
1857 |
ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ |
1858 |
|
1859 |
if (w->wd >= 0) |
1860 |
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
1861 |
} |
1862 |
|
1863 |
static void noinline |
1864 |
infy_del (EV_P_ ev_stat *w) |
1865 |
{ |
1866 |
int slot; |
1867 |
int wd = w->wd; |
1868 |
|
1869 |
if (wd < 0) |
1870 |
return; |
1871 |
|
1872 |
w->wd = -2; |
1873 |
slot = wd & (EV_INOTIFY_HASHSIZE - 1); |
1874 |
wlist_del (&fs_hash [slot].head, (WL)w); |
1875 |
|
1876 |
/* remove this watcher, if others are watching it, they will rearm */ |
1877 |
inotify_rm_watch (fs_fd, wd); |
1878 |
} |
1879 |
|
1880 |
static void noinline |
1881 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
1882 |
{ |
1883 |
if (slot < 0) |
1884 |
/* overflow, need to check for all hahs slots */ |
1885 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
1886 |
infy_wd (EV_A_ slot, wd, ev); |
1887 |
else |
1888 |
{ |
1889 |
WL w_; |
1890 |
|
1891 |
for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) |
1892 |
{ |
1893 |
ev_stat *w = (ev_stat *)w_; |
1894 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
1895 |
|
1896 |
if (w->wd == wd || wd == -1) |
1897 |
{ |
1898 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
1899 |
{ |
1900 |
w->wd = -1; |
1901 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
1902 |
} |
1903 |
|
1904 |
stat_timer_cb (EV_A_ &w->timer, 0); |
1905 |
} |
1906 |
} |
1907 |
} |
1908 |
} |
1909 |
|
1910 |
static void |
1911 |
infy_cb (EV_P_ ev_io *w, int revents) |
1912 |
{ |
1913 |
char buf [EV_INOTIFY_BUFSIZE]; |
1914 |
struct inotify_event *ev = (struct inotify_event *)buf; |
1915 |
int ofs; |
1916 |
int len = read (fs_fd, buf, sizeof (buf)); |
1917 |
|
1918 |
for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
1919 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
1920 |
} |
1921 |
|
1922 |
void inline_size |
1923 |
infy_init (EV_P) |
1924 |
{ |
1925 |
if (fs_fd != -2) |
1926 |
return; |
1927 |
|
1928 |
fs_fd = inotify_init (); |
1929 |
|
1930 |
if (fs_fd >= 0) |
1931 |
{ |
1932 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
1933 |
ev_set_priority (&fs_w, EV_MAXPRI); |
1934 |
ev_io_start (EV_A_ &fs_w); |
1935 |
} |
1936 |
} |
1937 |
|
1938 |
void inline_size |
1939 |
infy_fork (EV_P) |
1940 |
{ |
1941 |
int slot; |
1942 |
|
1943 |
if (fs_fd < 0) |
1944 |
return; |
1945 |
|
1946 |
close (fs_fd); |
1947 |
fs_fd = inotify_init (); |
1948 |
|
1949 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
1950 |
{ |
1951 |
WL w_ = fs_hash [slot].head; |
1952 |
fs_hash [slot].head = 0; |
1953 |
|
1954 |
while (w_) |
1955 |
{ |
1956 |
ev_stat *w = (ev_stat *)w_; |
1957 |
w_ = w_->next; /* lets us add this watcher */ |
1958 |
|
1959 |
w->wd = -1; |
1960 |
|
1961 |
if (fs_fd >= 0) |
1962 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
1963 |
else |
1964 |
ev_timer_start (EV_A_ &w->timer); |
1965 |
} |
1966 |
|
1967 |
} |
1968 |
} |
1969 |
|
1970 |
#endif |
1971 |
|
1972 |
void |
1973 |
ev_stat_stat (EV_P_ ev_stat *w) |
1974 |
{ |
1975 |
if (lstat (w->path, &w->attr) < 0) |
1976 |
w->attr.st_nlink = 0; |
1977 |
else if (!w->attr.st_nlink) |
1978 |
w->attr.st_nlink = 1; |
1979 |
} |
1980 |
|
1981 |
static void noinline |
1982 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
1983 |
{ |
1984 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
1985 |
|
1986 |
/* we copy this here each the time so that */ |
1987 |
/* prev has the old value when the callback gets invoked */ |
1988 |
w->prev = w->attr; |
1989 |
ev_stat_stat (EV_A_ w); |
1990 |
|
1991 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
1992 |
if ( |
1993 |
w->prev.st_dev != w->attr.st_dev |
1994 |
|| w->prev.st_ino != w->attr.st_ino |
1995 |
|| w->prev.st_mode != w->attr.st_mode |
1996 |
|| w->prev.st_nlink != w->attr.st_nlink |
1997 |
|| w->prev.st_uid != w->attr.st_uid |
1998 |
|| w->prev.st_gid != w->attr.st_gid |
1999 |
|| w->prev.st_rdev != w->attr.st_rdev |
2000 |
|| w->prev.st_size != w->attr.st_size |
2001 |
|| w->prev.st_atime != w->attr.st_atime |
2002 |
|| w->prev.st_mtime != w->attr.st_mtime |
2003 |
|| w->prev.st_ctime != w->attr.st_ctime |
2004 |
) { |
2005 |
#if EV_USE_INOTIFY |
2006 |
infy_del (EV_A_ w); |
2007 |
infy_add (EV_A_ w); |
2008 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
2009 |
#endif |
2010 |
|
2011 |
ev_feed_event (EV_A_ w, EV_STAT); |
2012 |
} |
2013 |
} |
2014 |
|
2015 |
void |
2016 |
ev_stat_start (EV_P_ ev_stat *w) |
2017 |
{ |
2018 |
if (expect_false (ev_is_active (w))) |
2019 |
return; |
2020 |
|
2021 |
/* since we use memcmp, we need to clear any padding data etc. */ |
2022 |
memset (&w->prev, 0, sizeof (ev_statdata)); |
2023 |
memset (&w->attr, 0, sizeof (ev_statdata)); |
2024 |
|
2025 |
ev_stat_stat (EV_A_ w); |
2026 |
|
2027 |
if (w->interval < MIN_STAT_INTERVAL) |
2028 |
w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL; |
2029 |
|
2030 |
ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); |
2031 |
ev_set_priority (&w->timer, ev_priority (w)); |
2032 |
|
2033 |
#if EV_USE_INOTIFY |
2034 |
infy_init (EV_A); |
2035 |
|
2036 |
if (fs_fd >= 0) |
2037 |
infy_add (EV_A_ w); |
2038 |
else |
2039 |
#endif |
2040 |
ev_timer_start (EV_A_ &w->timer); |
2041 |
|
2042 |
ev_start (EV_A_ (W)w, 1); |
2043 |
} |
2044 |
|
2045 |
void |
2046 |
ev_stat_stop (EV_P_ ev_stat *w) |
2047 |
{ |
2048 |
clear_pending (EV_A_ (W)w); |
2049 |
if (expect_false (!ev_is_active (w))) |
2050 |
return; |
2051 |
|
2052 |
#if EV_USE_INOTIFY |
2053 |
infy_del (EV_A_ w); |
2054 |
#endif |
2055 |
ev_timer_stop (EV_A_ &w->timer); |
2056 |
|
2057 |
ev_stop (EV_A_ (W)w); |
2058 |
} |
2059 |
#endif |
2060 |
|
2061 |
#if EV_IDLE_ENABLE |
2062 |
void |
2063 |
ev_idle_start (EV_P_ ev_idle *w) |
2064 |
{ |
2065 |
if (expect_false (ev_is_active (w))) |
2066 |
return; |
2067 |
|
2068 |
pri_adjust (EV_A_ (W)w); |
2069 |
|
2070 |
{ |
2071 |
int active = ++idlecnt [ABSPRI (w)]; |
2072 |
|
2073 |
++idleall; |
2074 |
ev_start (EV_A_ (W)w, active); |
2075 |
|
2076 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
2077 |
idles [ABSPRI (w)][active - 1] = w; |
2078 |
} |
2079 |
} |
2080 |
|
2081 |
void |
2082 |
ev_idle_stop (EV_P_ ev_idle *w) |
2083 |
{ |
2084 |
clear_pending (EV_A_ (W)w); |
2085 |
if (expect_false (!ev_is_active (w))) |
2086 |
return; |
2087 |
|
2088 |
{ |
2089 |
int active = ((W)w)->active; |
2090 |
|
2091 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
2092 |
((W)idles [ABSPRI (w)][active - 1])->active = active; |
2093 |
|
2094 |
ev_stop (EV_A_ (W)w); |
2095 |
--idleall; |
2096 |
} |
2097 |
} |
2098 |
#endif |
2099 |
|
2100 |
void |
2101 |
ev_prepare_start (EV_P_ ev_prepare *w) |
2102 |
{ |
2103 |
if (expect_false (ev_is_active (w))) |
2104 |
return; |
2105 |
|
2106 |
ev_start (EV_A_ (W)w, ++preparecnt); |
2107 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
2108 |
prepares [preparecnt - 1] = w; |
2109 |
} |
2110 |
|
2111 |
void |
2112 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
2113 |
{ |
2114 |
clear_pending (EV_A_ (W)w); |
2115 |
if (expect_false (!ev_is_active (w))) |
2116 |
return; |
2117 |
|
2118 |
{ |
2119 |
int active = ((W)w)->active; |
2120 |
prepares [active - 1] = prepares [--preparecnt]; |
2121 |
((W)prepares [active - 1])->active = active; |
2122 |
} |
2123 |
|
2124 |
ev_stop (EV_A_ (W)w); |
2125 |
} |
2126 |
|
2127 |
void |
2128 |
ev_check_start (EV_P_ ev_check *w) |
2129 |
{ |
2130 |
if (expect_false (ev_is_active (w))) |
2131 |
return; |
2132 |
|
2133 |
ev_start (EV_A_ (W)w, ++checkcnt); |
2134 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
2135 |
checks [checkcnt - 1] = w; |
2136 |
} |
2137 |
|
2138 |
void |
2139 |
ev_check_stop (EV_P_ ev_check *w) |
2140 |
{ |
2141 |
clear_pending (EV_A_ (W)w); |
2142 |
if (expect_false (!ev_is_active (w))) |
2143 |
return; |
2144 |
|
2145 |
{ |
2146 |
int active = ((W)w)->active; |
2147 |
checks [active - 1] = checks [--checkcnt]; |
2148 |
((W)checks [active - 1])->active = active; |
2149 |
} |
2150 |
|
2151 |
ev_stop (EV_A_ (W)w); |
2152 |
} |
2153 |
|
2154 |
#if EV_EMBED_ENABLE |
2155 |
void noinline |
2156 |
ev_embed_sweep (EV_P_ ev_embed *w) |
2157 |
{ |
2158 |
ev_loop (w->loop, EVLOOP_NONBLOCK); |
2159 |
} |
2160 |
|
2161 |
static void |
2162 |
embed_cb (EV_P_ ev_io *io, int revents) |
2163 |
{ |
2164 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
2165 |
|
2166 |
if (ev_cb (w)) |
2167 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
2168 |
else |
2169 |
ev_embed_sweep (loop, w); |
2170 |
} |
2171 |
|
2172 |
void |
2173 |
ev_embed_start (EV_P_ ev_embed *w) |
2174 |
{ |
2175 |
if (expect_false (ev_is_active (w))) |
2176 |
return; |
2177 |
|
2178 |
{ |
2179 |
struct ev_loop *loop = w->loop; |
2180 |
assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
2181 |
ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); |
2182 |
} |
2183 |
|
2184 |
ev_set_priority (&w->io, ev_priority (w)); |
2185 |
ev_io_start (EV_A_ &w->io); |
2186 |
|
2187 |
ev_start (EV_A_ (W)w, 1); |
2188 |
} |
2189 |
|
2190 |
void |
2191 |
ev_embed_stop (EV_P_ ev_embed *w) |
2192 |
{ |
2193 |
clear_pending (EV_A_ (W)w); |
2194 |
if (expect_false (!ev_is_active (w))) |
2195 |
return; |
2196 |
|
2197 |
ev_io_stop (EV_A_ &w->io); |
2198 |
|
2199 |
ev_stop (EV_A_ (W)w); |
2200 |
} |
2201 |
#endif |
2202 |
|
2203 |
#if EV_FORK_ENABLE |
2204 |
void |
2205 |
ev_fork_start (EV_P_ ev_fork *w) |
2206 |
{ |
2207 |
if (expect_false (ev_is_active (w))) |
2208 |
return; |
2209 |
|
2210 |
ev_start (EV_A_ (W)w, ++forkcnt); |
2211 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
2212 |
forks [forkcnt - 1] = w; |
2213 |
} |
2214 |
|
2215 |
void |
2216 |
ev_fork_stop (EV_P_ ev_fork *w) |
2217 |
{ |
2218 |
clear_pending (EV_A_ (W)w); |
2219 |
if (expect_false (!ev_is_active (w))) |
2220 |
return; |
2221 |
|
2222 |
{ |
2223 |
int active = ((W)w)->active; |
2224 |
forks [active - 1] = forks [--forkcnt]; |
2225 |
((W)forks [active - 1])->active = active; |
2226 |
} |
2227 |
|
2228 |
ev_stop (EV_A_ (W)w); |
2229 |
} |
2230 |
#endif |
2231 |
|
2232 |
/*****************************************************************************/ |
2233 |
|
2234 |
struct ev_once |
2235 |
{ |
2236 |
ev_io io; |
2237 |
ev_timer to; |
2238 |
void (*cb)(int revents, void *arg); |
2239 |
void *arg; |
2240 |
}; |
2241 |
|
2242 |
static void |
2243 |
once_cb (EV_P_ struct ev_once *once, int revents) |
2244 |
{ |
2245 |
void (*cb)(int revents, void *arg) = once->cb; |
2246 |
void *arg = once->arg; |
2247 |
|
2248 |
ev_io_stop (EV_A_ &once->io); |
2249 |
ev_timer_stop (EV_A_ &once->to); |
2250 |
ev_free (once); |
2251 |
|
2252 |
cb (revents, arg); |
2253 |
} |
2254 |
|
2255 |
static void |
2256 |
once_cb_io (EV_P_ ev_io *w, int revents) |
2257 |
{ |
2258 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
2259 |
} |
2260 |
|
2261 |
static void |
2262 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
2263 |
{ |
2264 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
2265 |
} |
2266 |
|
2267 |
void |
2268 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
2269 |
{ |
2270 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
2271 |
|
2272 |
if (expect_false (!once)) |
2273 |
{ |
2274 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
2275 |
return; |
2276 |
} |
2277 |
|
2278 |
once->cb = cb; |
2279 |
once->arg = arg; |
2280 |
|
2281 |
ev_init (&once->io, once_cb_io); |
2282 |
if (fd >= 0) |
2283 |
{ |
2284 |
ev_io_set (&once->io, fd, events); |
2285 |
ev_io_start (EV_A_ &once->io); |
2286 |
} |
2287 |
|
2288 |
ev_init (&once->to, once_cb_to); |
2289 |
if (timeout >= 0.) |
2290 |
{ |
2291 |
ev_timer_set (&once->to, timeout, 0.); |
2292 |
ev_timer_start (EV_A_ &once->to); |
2293 |
} |
2294 |
} |
2295 |
|
2296 |
#ifdef __cplusplus |
2297 |
} |
2298 |
#endif |
2299 |
|