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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_NANOSLEEP |
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# if HAVE_NANOSLEEP |
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# define EV_USE_NANOSLEEP 1 |
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# else |
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# define EV_USE_NANOSLEEP 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_NANOSLEEP |
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# define EV_USE_NANOSLEEP 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_STAT_ENABLE |
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# undef 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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#if !EV_USE_NANOSLEEP |
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# ifndef _WIN32 |
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# include <sys/select.h> |
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# endif |
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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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#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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/**/ |
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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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* 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 */ |
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|
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#if __GNUC__ >= 4 |
255 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
256 |
# define noinline __attribute__ ((noinline)) |
257 |
#else |
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# define expect(expr,value) (expr) |
259 |
# define noinline |
260 |
# if __STDC_VERSION__ < 199901L |
261 |
# define inline |
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# endif |
263 |
#endif |
264 |
|
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#define expect_false(expr) expect ((expr) != 0, 0) |
266 |
#define expect_true(expr) expect ((expr) != 0, 1) |
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#define inline_size static inline |
268 |
|
269 |
#if EV_MINIMAL |
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# define inline_speed static noinline |
271 |
#else |
272 |
# define inline_speed static inline |
273 |
#endif |
274 |
|
275 |
#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
276 |
#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
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|
278 |
#define EMPTY /* required for microsofts broken pseudo-c compiler */ |
279 |
#define EMPTY2(a,b) /* used to suppress some warnings */ |
280 |
|
281 |
typedef ev_watcher *W; |
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typedef ev_watcher_list *WL; |
283 |
typedef ev_watcher_time *WT; |
284 |
|
285 |
/* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
286 |
/* giving it a reasonably high chance of working on typical architetcures */ |
287 |
static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
288 |
|
289 |
#ifdef _WIN32 |
290 |
# include "ev_win32.c" |
291 |
#endif |
292 |
|
293 |
/*****************************************************************************/ |
294 |
|
295 |
static void (*syserr_cb)(const char *msg); |
296 |
|
297 |
void |
298 |
ev_set_syserr_cb (void (*cb)(const char *msg)) |
299 |
{ |
300 |
syserr_cb = cb; |
301 |
} |
302 |
|
303 |
static void noinline |
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syserr (const char *msg) |
305 |
{ |
306 |
if (!msg) |
307 |
msg = "(libev) system error"; |
308 |
|
309 |
if (syserr_cb) |
310 |
syserr_cb (msg); |
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else |
312 |
{ |
313 |
perror (msg); |
314 |
abort (); |
315 |
} |
316 |
} |
317 |
|
318 |
static void *(*alloc)(void *ptr, long size); |
319 |
|
320 |
void |
321 |
ev_set_allocator (void *(*cb)(void *ptr, long size)) |
322 |
{ |
323 |
alloc = cb; |
324 |
} |
325 |
|
326 |
inline_speed void * |
327 |
ev_realloc (void *ptr, long size) |
328 |
{ |
329 |
ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); |
330 |
|
331 |
if (!ptr && size) |
332 |
{ |
333 |
fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
334 |
abort (); |
335 |
} |
336 |
|
337 |
return ptr; |
338 |
} |
339 |
|
340 |
#define ev_malloc(size) ev_realloc (0, (size)) |
341 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
342 |
|
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/*****************************************************************************/ |
344 |
|
345 |
typedef struct |
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{ |
347 |
WL head; |
348 |
unsigned char events; |
349 |
unsigned char reify; |
350 |
#if EV_SELECT_IS_WINSOCKET |
351 |
SOCKET handle; |
352 |
#endif |
353 |
} ANFD; |
354 |
|
355 |
typedef struct |
356 |
{ |
357 |
W w; |
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int events; |
359 |
} ANPENDING; |
360 |
|
361 |
#if EV_USE_INOTIFY |
362 |
typedef struct |
363 |
{ |
364 |
WL head; |
365 |
} ANFS; |
366 |
#endif |
367 |
|
368 |
#if EV_MULTIPLICITY |
369 |
|
370 |
struct ev_loop |
371 |
{ |
372 |
ev_tstamp ev_rt_now; |
373 |
#define ev_rt_now ((loop)->ev_rt_now) |
374 |
#define VAR(name,decl) decl; |
375 |
#include "ev_vars.h" |
376 |
#undef VAR |
377 |
}; |
378 |
#include "ev_wrap.h" |
379 |
|
380 |
static struct ev_loop default_loop_struct; |
381 |
struct ev_loop *ev_default_loop_ptr; |
382 |
|
383 |
#else |
384 |
|
385 |
ev_tstamp ev_rt_now; |
386 |
#define VAR(name,decl) static decl; |
387 |
#include "ev_vars.h" |
388 |
#undef VAR |
389 |
|
390 |
static int ev_default_loop_ptr; |
391 |
|
392 |
#endif |
393 |
|
394 |
/*****************************************************************************/ |
395 |
|
396 |
ev_tstamp |
397 |
ev_time (void) |
398 |
{ |
399 |
#if EV_USE_REALTIME |
400 |
struct timespec ts; |
401 |
clock_gettime (CLOCK_REALTIME, &ts); |
402 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
403 |
#else |
404 |
struct timeval tv; |
405 |
gettimeofday (&tv, 0); |
406 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
407 |
#endif |
408 |
} |
409 |
|
410 |
ev_tstamp inline_size |
411 |
get_clock (void) |
412 |
{ |
413 |
#if EV_USE_MONOTONIC |
414 |
if (expect_true (have_monotonic)) |
415 |
{ |
416 |
struct timespec ts; |
417 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
418 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
419 |
} |
420 |
#endif |
421 |
|
422 |
return ev_time (); |
423 |
} |
424 |
|
425 |
#if EV_MULTIPLICITY |
426 |
ev_tstamp |
427 |
ev_now (EV_P) |
428 |
{ |
429 |
return ev_rt_now; |
430 |
} |
431 |
#endif |
432 |
|
433 |
void |
434 |
ev_sleep (ev_tstamp delay) |
435 |
{ |
436 |
if (delay > 0.) |
437 |
{ |
438 |
#if EV_USE_NANOSLEEP |
439 |
struct timespec ts; |
440 |
|
441 |
ts.tv_sec = (time_t)delay; |
442 |
ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); |
443 |
|
444 |
nanosleep (&ts, 0); |
445 |
#elif defined(_WIN32) |
446 |
Sleep (delay * 1e3); |
447 |
#else |
448 |
struct timeval tv; |
449 |
|
450 |
tv.tv_sec = (time_t)delay; |
451 |
tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); |
452 |
|
453 |
select (0, 0, 0, 0, &tv); |
454 |
#endif |
455 |
} |
456 |
} |
457 |
|
458 |
/*****************************************************************************/ |
459 |
|
460 |
int inline_size |
461 |
array_nextsize (int elem, int cur, int cnt) |
462 |
{ |
463 |
int ncur = cur + 1; |
464 |
|
465 |
do |
466 |
ncur <<= 1; |
467 |
while (cnt > ncur); |
468 |
|
469 |
/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ |
470 |
if (elem * ncur > 4096) |
471 |
{ |
472 |
ncur *= elem; |
473 |
ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; |
474 |
ncur = ncur - sizeof (void *) * 4; |
475 |
ncur /= elem; |
476 |
} |
477 |
|
478 |
return ncur; |
479 |
} |
480 |
|
481 |
static noinline void * |
482 |
array_realloc (int elem, void *base, int *cur, int cnt) |
483 |
{ |
484 |
*cur = array_nextsize (elem, *cur, cnt); |
485 |
return ev_realloc (base, elem * *cur); |
486 |
} |
487 |
|
488 |
#define array_needsize(type,base,cur,cnt,init) \ |
489 |
if (expect_false ((cnt) > (cur))) \ |
490 |
{ \ |
491 |
int ocur_ = (cur); \ |
492 |
(base) = (type *)array_realloc \ |
493 |
(sizeof (type), (base), &(cur), (cnt)); \ |
494 |
init ((base) + (ocur_), (cur) - ocur_); \ |
495 |
} |
496 |
|
497 |
#if 0 |
498 |
#define array_slim(type,stem) \ |
499 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
500 |
{ \ |
501 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
502 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
503 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
504 |
} |
505 |
#endif |
506 |
|
507 |
#define array_free(stem, idx) \ |
508 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
509 |
|
510 |
/*****************************************************************************/ |
511 |
|
512 |
void noinline |
513 |
ev_feed_event (EV_P_ void *w, int revents) |
514 |
{ |
515 |
W w_ = (W)w; |
516 |
int pri = ABSPRI (w_); |
517 |
|
518 |
if (expect_false (w_->pending)) |
519 |
pendings [pri][w_->pending - 1].events |= revents; |
520 |
else |
521 |
{ |
522 |
w_->pending = ++pendingcnt [pri]; |
523 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
524 |
pendings [pri][w_->pending - 1].w = w_; |
525 |
pendings [pri][w_->pending - 1].events = revents; |
526 |
} |
527 |
} |
528 |
|
529 |
void inline_speed |
530 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
531 |
{ |
532 |
int i; |
533 |
|
534 |
for (i = 0; i < eventcnt; ++i) |
535 |
ev_feed_event (EV_A_ events [i], type); |
536 |
} |
537 |
|
538 |
/*****************************************************************************/ |
539 |
|
540 |
void inline_size |
541 |
anfds_init (ANFD *base, int count) |
542 |
{ |
543 |
while (count--) |
544 |
{ |
545 |
base->head = 0; |
546 |
base->events = EV_NONE; |
547 |
base->reify = 0; |
548 |
|
549 |
++base; |
550 |
} |
551 |
} |
552 |
|
553 |
void inline_speed |
554 |
fd_event (EV_P_ int fd, int revents) |
555 |
{ |
556 |
ANFD *anfd = anfds + fd; |
557 |
ev_io *w; |
558 |
|
559 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
560 |
{ |
561 |
int ev = w->events & revents; |
562 |
|
563 |
if (ev) |
564 |
ev_feed_event (EV_A_ (W)w, ev); |
565 |
} |
566 |
} |
567 |
|
568 |
void |
569 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
570 |
{ |
571 |
if (fd >= 0 && fd < anfdmax) |
572 |
fd_event (EV_A_ fd, revents); |
573 |
} |
574 |
|
575 |
void inline_size |
576 |
fd_reify (EV_P) |
577 |
{ |
578 |
int i; |
579 |
|
580 |
for (i = 0; i < fdchangecnt; ++i) |
581 |
{ |
582 |
int fd = fdchanges [i]; |
583 |
ANFD *anfd = anfds + fd; |
584 |
ev_io *w; |
585 |
|
586 |
unsigned char events = 0; |
587 |
|
588 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
589 |
events |= (unsigned char)w->events; |
590 |
|
591 |
#if EV_SELECT_IS_WINSOCKET |
592 |
if (events) |
593 |
{ |
594 |
unsigned long argp; |
595 |
anfd->handle = _get_osfhandle (fd); |
596 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
597 |
} |
598 |
#endif |
599 |
|
600 |
{ |
601 |
unsigned char o_events = anfd->events; |
602 |
unsigned char o_reify = anfd->reify; |
603 |
|
604 |
anfd->reify = 0; |
605 |
anfd->events = events; |
606 |
|
607 |
if (o_events != events || o_reify & EV_IOFDSET) |
608 |
backend_modify (EV_A_ fd, o_events, events); |
609 |
} |
610 |
} |
611 |
|
612 |
fdchangecnt = 0; |
613 |
} |
614 |
|
615 |
void inline_size |
616 |
fd_change (EV_P_ int fd, int flags) |
617 |
{ |
618 |
unsigned char reify = anfds [fd].reify; |
619 |
anfds [fd].reify |= flags; |
620 |
|
621 |
if (expect_true (!reify)) |
622 |
{ |
623 |
++fdchangecnt; |
624 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
625 |
fdchanges [fdchangecnt - 1] = fd; |
626 |
} |
627 |
} |
628 |
|
629 |
void inline_speed |
630 |
fd_kill (EV_P_ int fd) |
631 |
{ |
632 |
ev_io *w; |
633 |
|
634 |
while ((w = (ev_io *)anfds [fd].head)) |
635 |
{ |
636 |
ev_io_stop (EV_A_ w); |
637 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
638 |
} |
639 |
} |
640 |
|
641 |
int inline_size |
642 |
fd_valid (int fd) |
643 |
{ |
644 |
#ifdef _WIN32 |
645 |
return _get_osfhandle (fd) != -1; |
646 |
#else |
647 |
return fcntl (fd, F_GETFD) != -1; |
648 |
#endif |
649 |
} |
650 |
|
651 |
/* called on EBADF to verify fds */ |
652 |
static void noinline |
653 |
fd_ebadf (EV_P) |
654 |
{ |
655 |
int fd; |
656 |
|
657 |
for (fd = 0; fd < anfdmax; ++fd) |
658 |
if (anfds [fd].events) |
659 |
if (!fd_valid (fd) == -1 && errno == EBADF) |
660 |
fd_kill (EV_A_ fd); |
661 |
} |
662 |
|
663 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
664 |
static void noinline |
665 |
fd_enomem (EV_P) |
666 |
{ |
667 |
int fd; |
668 |
|
669 |
for (fd = anfdmax; fd--; ) |
670 |
if (anfds [fd].events) |
671 |
{ |
672 |
fd_kill (EV_A_ fd); |
673 |
return; |
674 |
} |
675 |
} |
676 |
|
677 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
678 |
static void noinline |
679 |
fd_rearm_all (EV_P) |
680 |
{ |
681 |
int fd; |
682 |
|
683 |
for (fd = 0; fd < anfdmax; ++fd) |
684 |
if (anfds [fd].events) |
685 |
{ |
686 |
anfds [fd].events = 0; |
687 |
fd_change (EV_A_ fd, EV_IOFDSET | 1); |
688 |
} |
689 |
} |
690 |
|
691 |
/*****************************************************************************/ |
692 |
|
693 |
void inline_speed |
694 |
upheap (WT *heap, int k) |
695 |
{ |
696 |
WT w = heap [k]; |
697 |
|
698 |
while (k) |
699 |
{ |
700 |
int p = (k - 1) >> 1; |
701 |
|
702 |
if (heap [p]->at <= w->at) |
703 |
break; |
704 |
|
705 |
heap [k] = heap [p]; |
706 |
((W)heap [k])->active = k + 1; |
707 |
k = p; |
708 |
} |
709 |
|
710 |
heap [k] = w; |
711 |
((W)heap [k])->active = k + 1; |
712 |
} |
713 |
|
714 |
void inline_speed |
715 |
downheap (WT *heap, int N, int k) |
716 |
{ |
717 |
WT w = heap [k]; |
718 |
|
719 |
for (;;) |
720 |
{ |
721 |
int c = (k << 1) + 1; |
722 |
|
723 |
if (c >= N) |
724 |
break; |
725 |
|
726 |
c += c + 1 < N && heap [c]->at > heap [c + 1]->at |
727 |
? 1 : 0; |
728 |
|
729 |
if (w->at <= heap [c]->at) |
730 |
break; |
731 |
|
732 |
heap [k] = heap [c]; |
733 |
((W)heap [k])->active = k + 1; |
734 |
|
735 |
k = c; |
736 |
} |
737 |
|
738 |
heap [k] = w; |
739 |
((W)heap [k])->active = k + 1; |
740 |
} |
741 |
|
742 |
void inline_size |
743 |
adjustheap (WT *heap, int N, int k) |
744 |
{ |
745 |
upheap (heap, k); |
746 |
downheap (heap, N, k); |
747 |
} |
748 |
|
749 |
/*****************************************************************************/ |
750 |
|
751 |
typedef struct |
752 |
{ |
753 |
WL head; |
754 |
sig_atomic_t volatile gotsig; |
755 |
} ANSIG; |
756 |
|
757 |
static ANSIG *signals; |
758 |
static int signalmax; |
759 |
|
760 |
static int sigpipe [2]; |
761 |
static sig_atomic_t volatile gotsig; |
762 |
static ev_io sigev; |
763 |
|
764 |
void inline_size |
765 |
signals_init (ANSIG *base, int count) |
766 |
{ |
767 |
while (count--) |
768 |
{ |
769 |
base->head = 0; |
770 |
base->gotsig = 0; |
771 |
|
772 |
++base; |
773 |
} |
774 |
} |
775 |
|
776 |
static void |
777 |
sighandler (int signum) |
778 |
{ |
779 |
#if _WIN32 |
780 |
signal (signum, sighandler); |
781 |
#endif |
782 |
|
783 |
signals [signum - 1].gotsig = 1; |
784 |
|
785 |
if (!gotsig) |
786 |
{ |
787 |
int old_errno = errno; |
788 |
gotsig = 1; |
789 |
write (sigpipe [1], &signum, 1); |
790 |
errno = old_errno; |
791 |
} |
792 |
} |
793 |
|
794 |
void noinline |
795 |
ev_feed_signal_event (EV_P_ int signum) |
796 |
{ |
797 |
WL w; |
798 |
|
799 |
#if EV_MULTIPLICITY |
800 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
801 |
#endif |
802 |
|
803 |
--signum; |
804 |
|
805 |
if (signum < 0 || signum >= signalmax) |
806 |
return; |
807 |
|
808 |
signals [signum].gotsig = 0; |
809 |
|
810 |
for (w = signals [signum].head; w; w = w->next) |
811 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
812 |
} |
813 |
|
814 |
static void |
815 |
sigcb (EV_P_ ev_io *iow, int revents) |
816 |
{ |
817 |
int signum; |
818 |
|
819 |
read (sigpipe [0], &revents, 1); |
820 |
gotsig = 0; |
821 |
|
822 |
for (signum = signalmax; signum--; ) |
823 |
if (signals [signum].gotsig) |
824 |
ev_feed_signal_event (EV_A_ signum + 1); |
825 |
} |
826 |
|
827 |
void inline_speed |
828 |
fd_intern (int fd) |
829 |
{ |
830 |
#ifdef _WIN32 |
831 |
int arg = 1; |
832 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
833 |
#else |
834 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
835 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
836 |
#endif |
837 |
} |
838 |
|
839 |
static void noinline |
840 |
siginit (EV_P) |
841 |
{ |
842 |
fd_intern (sigpipe [0]); |
843 |
fd_intern (sigpipe [1]); |
844 |
|
845 |
ev_io_set (&sigev, sigpipe [0], EV_READ); |
846 |
ev_io_start (EV_A_ &sigev); |
847 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
848 |
} |
849 |
|
850 |
/*****************************************************************************/ |
851 |
|
852 |
static WL childs [EV_PID_HASHSIZE]; |
853 |
|
854 |
#ifndef _WIN32 |
855 |
|
856 |
static ev_signal childev; |
857 |
|
858 |
void inline_speed |
859 |
child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) |
860 |
{ |
861 |
ev_child *w; |
862 |
|
863 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
864 |
if (w->pid == pid || !w->pid) |
865 |
{ |
866 |
ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ |
867 |
w->rpid = pid; |
868 |
w->rstatus = status; |
869 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
870 |
} |
871 |
} |
872 |
|
873 |
#ifndef WCONTINUED |
874 |
# define WCONTINUED 0 |
875 |
#endif |
876 |
|
877 |
static void |
878 |
childcb (EV_P_ ev_signal *sw, int revents) |
879 |
{ |
880 |
int pid, status; |
881 |
|
882 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
883 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
884 |
if (!WCONTINUED |
885 |
|| errno != EINVAL |
886 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
887 |
return; |
888 |
|
889 |
/* make sure we are called again until all childs have been reaped */ |
890 |
/* we need to do it this way so that the callback gets called before we continue */ |
891 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
892 |
|
893 |
child_reap (EV_A_ sw, pid, pid, status); |
894 |
if (EV_PID_HASHSIZE > 1) |
895 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
896 |
} |
897 |
|
898 |
#endif |
899 |
|
900 |
/*****************************************************************************/ |
901 |
|
902 |
#if EV_USE_PORT |
903 |
# include "ev_port.c" |
904 |
#endif |
905 |
#if EV_USE_KQUEUE |
906 |
# include "ev_kqueue.c" |
907 |
#endif |
908 |
#if EV_USE_EPOLL |
909 |
# include "ev_epoll.c" |
910 |
#endif |
911 |
#if EV_USE_POLL |
912 |
# include "ev_poll.c" |
913 |
#endif |
914 |
#if EV_USE_SELECT |
915 |
# include "ev_select.c" |
916 |
#endif |
917 |
|
918 |
int |
919 |
ev_version_major (void) |
920 |
{ |
921 |
return EV_VERSION_MAJOR; |
922 |
} |
923 |
|
924 |
int |
925 |
ev_version_minor (void) |
926 |
{ |
927 |
return EV_VERSION_MINOR; |
928 |
} |
929 |
|
930 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
931 |
int inline_size |
932 |
enable_secure (void) |
933 |
{ |
934 |
#ifdef _WIN32 |
935 |
return 0; |
936 |
#else |
937 |
return getuid () != geteuid () |
938 |
|| getgid () != getegid (); |
939 |
#endif |
940 |
} |
941 |
|
942 |
unsigned int |
943 |
ev_supported_backends (void) |
944 |
{ |
945 |
unsigned int flags = 0; |
946 |
|
947 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
948 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
949 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
950 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
951 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
952 |
|
953 |
return flags; |
954 |
} |
955 |
|
956 |
unsigned int |
957 |
ev_recommended_backends (void) |
958 |
{ |
959 |
unsigned int flags = ev_supported_backends (); |
960 |
|
961 |
#ifndef __NetBSD__ |
962 |
/* kqueue is borked on everything but netbsd apparently */ |
963 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
964 |
flags &= ~EVBACKEND_KQUEUE; |
965 |
#endif |
966 |
#ifdef __APPLE__ |
967 |
// flags &= ~EVBACKEND_KQUEUE; for documentation |
968 |
flags &= ~EVBACKEND_POLL; |
969 |
#endif |
970 |
|
971 |
return flags; |
972 |
} |
973 |
|
974 |
unsigned int |
975 |
ev_embeddable_backends (void) |
976 |
{ |
977 |
int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
978 |
|
979 |
/* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
980 |
/* please fix it and tell me how to detect the fix */ |
981 |
flags &= ~EVBACKEND_EPOLL; |
982 |
|
983 |
#ifdef __APPLE__ |
984 |
/* is there anything thats not broken on darwin? */ |
985 |
flags &= ~EVBACKEND_KQUEUE; |
986 |
#endif |
987 |
|
988 |
return flags; |
989 |
} |
990 |
|
991 |
unsigned int |
992 |
ev_backend (EV_P) |
993 |
{ |
994 |
return backend; |
995 |
} |
996 |
|
997 |
unsigned int |
998 |
ev_loop_count (EV_P) |
999 |
{ |
1000 |
return loop_count; |
1001 |
} |
1002 |
|
1003 |
void |
1004 |
ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
1005 |
{ |
1006 |
io_blocktime = interval; |
1007 |
} |
1008 |
|
1009 |
void |
1010 |
ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
1011 |
{ |
1012 |
timeout_blocktime = interval; |
1013 |
} |
1014 |
|
1015 |
static void noinline |
1016 |
loop_init (EV_P_ unsigned int flags) |
1017 |
{ |
1018 |
if (!backend) |
1019 |
{ |
1020 |
#if EV_USE_MONOTONIC |
1021 |
{ |
1022 |
struct timespec ts; |
1023 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
1024 |
have_monotonic = 1; |
1025 |
} |
1026 |
#endif |
1027 |
|
1028 |
ev_rt_now = ev_time (); |
1029 |
mn_now = get_clock (); |
1030 |
now_floor = mn_now; |
1031 |
rtmn_diff = ev_rt_now - mn_now; |
1032 |
|
1033 |
io_blocktime = 0.; |
1034 |
timeout_blocktime = 0.; |
1035 |
|
1036 |
/* pid check not overridable via env */ |
1037 |
#ifndef _WIN32 |
1038 |
if (flags & EVFLAG_FORKCHECK) |
1039 |
curpid = getpid (); |
1040 |
#endif |
1041 |
|
1042 |
if (!(flags & EVFLAG_NOENV) |
1043 |
&& !enable_secure () |
1044 |
&& getenv ("LIBEV_FLAGS")) |
1045 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
1046 |
|
1047 |
if (!(flags & 0x0000ffffUL)) |
1048 |
flags |= ev_recommended_backends (); |
1049 |
|
1050 |
backend = 0; |
1051 |
backend_fd = -1; |
1052 |
#if EV_USE_INOTIFY |
1053 |
fs_fd = -2; |
1054 |
#endif |
1055 |
|
1056 |
#if EV_USE_PORT |
1057 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
1058 |
#endif |
1059 |
#if EV_USE_KQUEUE |
1060 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
1061 |
#endif |
1062 |
#if EV_USE_EPOLL |
1063 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
1064 |
#endif |
1065 |
#if EV_USE_POLL |
1066 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
1067 |
#endif |
1068 |
#if EV_USE_SELECT |
1069 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
1070 |
#endif |
1071 |
|
1072 |
ev_init (&sigev, sigcb); |
1073 |
ev_set_priority (&sigev, EV_MAXPRI); |
1074 |
} |
1075 |
} |
1076 |
|
1077 |
static void noinline |
1078 |
loop_destroy (EV_P) |
1079 |
{ |
1080 |
int i; |
1081 |
|
1082 |
#if EV_USE_INOTIFY |
1083 |
if (fs_fd >= 0) |
1084 |
close (fs_fd); |
1085 |
#endif |
1086 |
|
1087 |
if (backend_fd >= 0) |
1088 |
close (backend_fd); |
1089 |
|
1090 |
#if EV_USE_PORT |
1091 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
1092 |
#endif |
1093 |
#if EV_USE_KQUEUE |
1094 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
1095 |
#endif |
1096 |
#if EV_USE_EPOLL |
1097 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1098 |
#endif |
1099 |
#if EV_USE_POLL |
1100 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1101 |
#endif |
1102 |
#if EV_USE_SELECT |
1103 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1104 |
#endif |
1105 |
|
1106 |
for (i = NUMPRI; i--; ) |
1107 |
{ |
1108 |
array_free (pending, [i]); |
1109 |
#if EV_IDLE_ENABLE |
1110 |
array_free (idle, [i]); |
1111 |
#endif |
1112 |
} |
1113 |
|
1114 |
ev_free (anfds); anfdmax = 0; |
1115 |
|
1116 |
/* have to use the microsoft-never-gets-it-right macro */ |
1117 |
array_free (fdchange, EMPTY); |
1118 |
array_free (timer, EMPTY); |
1119 |
#if EV_PERIODIC_ENABLE |
1120 |
array_free (periodic, EMPTY); |
1121 |
#endif |
1122 |
#if EV_FORK_ENABLE |
1123 |
array_free (fork, EMPTY); |
1124 |
#endif |
1125 |
array_free (prepare, EMPTY); |
1126 |
array_free (check, EMPTY); |
1127 |
|
1128 |
backend = 0; |
1129 |
} |
1130 |
|
1131 |
void inline_size infy_fork (EV_P); |
1132 |
|
1133 |
void inline_size |
1134 |
loop_fork (EV_P) |
1135 |
{ |
1136 |
#if EV_USE_PORT |
1137 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1138 |
#endif |
1139 |
#if EV_USE_KQUEUE |
1140 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1141 |
#endif |
1142 |
#if EV_USE_EPOLL |
1143 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1144 |
#endif |
1145 |
#if EV_USE_INOTIFY |
1146 |
infy_fork (EV_A); |
1147 |
#endif |
1148 |
|
1149 |
if (ev_is_active (&sigev)) |
1150 |
{ |
1151 |
/* default loop */ |
1152 |
|
1153 |
ev_ref (EV_A); |
1154 |
ev_io_stop (EV_A_ &sigev); |
1155 |
close (sigpipe [0]); |
1156 |
close (sigpipe [1]); |
1157 |
|
1158 |
while (pipe (sigpipe)) |
1159 |
syserr ("(libev) error creating pipe"); |
1160 |
|
1161 |
siginit (EV_A); |
1162 |
} |
1163 |
|
1164 |
postfork = 0; |
1165 |
} |
1166 |
|
1167 |
#if EV_MULTIPLICITY |
1168 |
struct ev_loop * |
1169 |
ev_loop_new (unsigned int flags) |
1170 |
{ |
1171 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1172 |
|
1173 |
memset (loop, 0, sizeof (struct ev_loop)); |
1174 |
|
1175 |
loop_init (EV_A_ flags); |
1176 |
|
1177 |
if (ev_backend (EV_A)) |
1178 |
return loop; |
1179 |
|
1180 |
return 0; |
1181 |
} |
1182 |
|
1183 |
void |
1184 |
ev_loop_destroy (EV_P) |
1185 |
{ |
1186 |
loop_destroy (EV_A); |
1187 |
ev_free (loop); |
1188 |
} |
1189 |
|
1190 |
void |
1191 |
ev_loop_fork (EV_P) |
1192 |
{ |
1193 |
postfork = 1; |
1194 |
} |
1195 |
|
1196 |
#endif |
1197 |
|
1198 |
#if EV_MULTIPLICITY |
1199 |
struct ev_loop * |
1200 |
ev_default_loop_init (unsigned int flags) |
1201 |
#else |
1202 |
int |
1203 |
ev_default_loop (unsigned int flags) |
1204 |
#endif |
1205 |
{ |
1206 |
if (sigpipe [0] == sigpipe [1]) |
1207 |
if (pipe (sigpipe)) |
1208 |
return 0; |
1209 |
|
1210 |
if (!ev_default_loop_ptr) |
1211 |
{ |
1212 |
#if EV_MULTIPLICITY |
1213 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
1214 |
#else |
1215 |
ev_default_loop_ptr = 1; |
1216 |
#endif |
1217 |
|
1218 |
loop_init (EV_A_ flags); |
1219 |
|
1220 |
if (ev_backend (EV_A)) |
1221 |
{ |
1222 |
siginit (EV_A); |
1223 |
|
1224 |
#ifndef _WIN32 |
1225 |
ev_signal_init (&childev, childcb, SIGCHLD); |
1226 |
ev_set_priority (&childev, EV_MAXPRI); |
1227 |
ev_signal_start (EV_A_ &childev); |
1228 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
1229 |
#endif |
1230 |
} |
1231 |
else |
1232 |
ev_default_loop_ptr = 0; |
1233 |
} |
1234 |
|
1235 |
return ev_default_loop_ptr; |
1236 |
} |
1237 |
|
1238 |
void |
1239 |
ev_default_destroy (void) |
1240 |
{ |
1241 |
#if EV_MULTIPLICITY |
1242 |
struct ev_loop *loop = ev_default_loop_ptr; |
1243 |
#endif |
1244 |
|
1245 |
#ifndef _WIN32 |
1246 |
ev_ref (EV_A); /* child watcher */ |
1247 |
ev_signal_stop (EV_A_ &childev); |
1248 |
#endif |
1249 |
|
1250 |
ev_ref (EV_A); /* signal watcher */ |
1251 |
ev_io_stop (EV_A_ &sigev); |
1252 |
|
1253 |
close (sigpipe [0]); sigpipe [0] = 0; |
1254 |
close (sigpipe [1]); sigpipe [1] = 0; |
1255 |
|
1256 |
loop_destroy (EV_A); |
1257 |
} |
1258 |
|
1259 |
void |
1260 |
ev_default_fork (void) |
1261 |
{ |
1262 |
#if EV_MULTIPLICITY |
1263 |
struct ev_loop *loop = ev_default_loop_ptr; |
1264 |
#endif |
1265 |
|
1266 |
if (backend) |
1267 |
postfork = 1; |
1268 |
} |
1269 |
|
1270 |
/*****************************************************************************/ |
1271 |
|
1272 |
void |
1273 |
ev_invoke (EV_P_ void *w, int revents) |
1274 |
{ |
1275 |
EV_CB_INVOKE ((W)w, revents); |
1276 |
} |
1277 |
|
1278 |
void inline_speed |
1279 |
call_pending (EV_P) |
1280 |
{ |
1281 |
int pri; |
1282 |
|
1283 |
for (pri = NUMPRI; pri--; ) |
1284 |
while (pendingcnt [pri]) |
1285 |
{ |
1286 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1287 |
|
1288 |
if (expect_true (p->w)) |
1289 |
{ |
1290 |
/*assert (("non-pending watcher on pending list", p->w->pending));*/ |
1291 |
|
1292 |
p->w->pending = 0; |
1293 |
EV_CB_INVOKE (p->w, p->events); |
1294 |
} |
1295 |
} |
1296 |
} |
1297 |
|
1298 |
void inline_size |
1299 |
timers_reify (EV_P) |
1300 |
{ |
1301 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
1302 |
{ |
1303 |
ev_timer *w = (ev_timer *)timers [0]; |
1304 |
|
1305 |
/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ |
1306 |
|
1307 |
/* first reschedule or stop timer */ |
1308 |
if (w->repeat) |
1309 |
{ |
1310 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1311 |
|
1312 |
((WT)w)->at += w->repeat; |
1313 |
if (((WT)w)->at < mn_now) |
1314 |
((WT)w)->at = mn_now; |
1315 |
|
1316 |
downheap (timers, timercnt, 0); |
1317 |
} |
1318 |
else |
1319 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1320 |
|
1321 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
1322 |
} |
1323 |
} |
1324 |
|
1325 |
#if EV_PERIODIC_ENABLE |
1326 |
void inline_size |
1327 |
periodics_reify (EV_P) |
1328 |
{ |
1329 |
while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
1330 |
{ |
1331 |
ev_periodic *w = (ev_periodic *)periodics [0]; |
1332 |
|
1333 |
/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ |
1334 |
|
1335 |
/* first reschedule or stop timer */ |
1336 |
if (w->reschedule_cb) |
1337 |
{ |
1338 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); |
1339 |
assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
1340 |
downheap (periodics, periodiccnt, 0); |
1341 |
} |
1342 |
else if (w->interval) |
1343 |
{ |
1344 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1345 |
if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval; |
1346 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
1347 |
downheap (periodics, periodiccnt, 0); |
1348 |
} |
1349 |
else |
1350 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1351 |
|
1352 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
1353 |
} |
1354 |
} |
1355 |
|
1356 |
static void noinline |
1357 |
periodics_reschedule (EV_P) |
1358 |
{ |
1359 |
int i; |
1360 |
|
1361 |
/* adjust periodics after time jump */ |
1362 |
for (i = 0; i < periodiccnt; ++i) |
1363 |
{ |
1364 |
ev_periodic *w = (ev_periodic *)periodics [i]; |
1365 |
|
1366 |
if (w->reschedule_cb) |
1367 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1368 |
else if (w->interval) |
1369 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1370 |
} |
1371 |
|
1372 |
/* now rebuild the heap */ |
1373 |
for (i = periodiccnt >> 1; i--; ) |
1374 |
downheap (periodics, periodiccnt, i); |
1375 |
} |
1376 |
#endif |
1377 |
|
1378 |
#if EV_IDLE_ENABLE |
1379 |
void inline_size |
1380 |
idle_reify (EV_P) |
1381 |
{ |
1382 |
if (expect_false (idleall)) |
1383 |
{ |
1384 |
int pri; |
1385 |
|
1386 |
for (pri = NUMPRI; pri--; ) |
1387 |
{ |
1388 |
if (pendingcnt [pri]) |
1389 |
break; |
1390 |
|
1391 |
if (idlecnt [pri]) |
1392 |
{ |
1393 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
1394 |
break; |
1395 |
} |
1396 |
} |
1397 |
} |
1398 |
} |
1399 |
#endif |
1400 |
|
1401 |
void inline_speed |
1402 |
time_update (EV_P_ ev_tstamp max_block) |
1403 |
{ |
1404 |
int i; |
1405 |
|
1406 |
#if EV_USE_MONOTONIC |
1407 |
if (expect_true (have_monotonic)) |
1408 |
{ |
1409 |
ev_tstamp odiff = rtmn_diff; |
1410 |
|
1411 |
mn_now = get_clock (); |
1412 |
|
1413 |
/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
1414 |
/* interpolate in the meantime */ |
1415 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
1416 |
{ |
1417 |
ev_rt_now = rtmn_diff + mn_now; |
1418 |
return; |
1419 |
} |
1420 |
|
1421 |
now_floor = mn_now; |
1422 |
ev_rt_now = ev_time (); |
1423 |
|
1424 |
/* loop a few times, before making important decisions. |
1425 |
* on the choice of "4": one iteration isn't enough, |
1426 |
* in case we get preempted during the calls to |
1427 |
* ev_time and get_clock. a second call is almost guaranteed |
1428 |
* to succeed in that case, though. and looping a few more times |
1429 |
* doesn't hurt either as we only do this on time-jumps or |
1430 |
* in the unlikely event of having been preempted here. |
1431 |
*/ |
1432 |
for (i = 4; --i; ) |
1433 |
{ |
1434 |
rtmn_diff = ev_rt_now - mn_now; |
1435 |
|
1436 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
1437 |
return; /* all is well */ |
1438 |
|
1439 |
ev_rt_now = ev_time (); |
1440 |
mn_now = get_clock (); |
1441 |
now_floor = mn_now; |
1442 |
} |
1443 |
|
1444 |
# if EV_PERIODIC_ENABLE |
1445 |
periodics_reschedule (EV_A); |
1446 |
# endif |
1447 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
1448 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
1449 |
} |
1450 |
else |
1451 |
#endif |
1452 |
{ |
1453 |
ev_rt_now = ev_time (); |
1454 |
|
1455 |
if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
1456 |
{ |
1457 |
#if EV_PERIODIC_ENABLE |
1458 |
periodics_reschedule (EV_A); |
1459 |
#endif |
1460 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
1461 |
for (i = 0; i < timercnt; ++i) |
1462 |
((WT)timers [i])->at += ev_rt_now - mn_now; |
1463 |
} |
1464 |
|
1465 |
mn_now = ev_rt_now; |
1466 |
} |
1467 |
} |
1468 |
|
1469 |
void |
1470 |
ev_ref (EV_P) |
1471 |
{ |
1472 |
++activecnt; |
1473 |
} |
1474 |
|
1475 |
void |
1476 |
ev_unref (EV_P) |
1477 |
{ |
1478 |
--activecnt; |
1479 |
} |
1480 |
|
1481 |
static int loop_done; |
1482 |
|
1483 |
void |
1484 |
ev_loop (EV_P_ int flags) |
1485 |
{ |
1486 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) |
1487 |
? EVUNLOOP_ONE |
1488 |
: EVUNLOOP_CANCEL; |
1489 |
|
1490 |
call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ |
1491 |
|
1492 |
do |
1493 |
{ |
1494 |
#ifndef _WIN32 |
1495 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
1496 |
if (expect_false (getpid () != curpid)) |
1497 |
{ |
1498 |
curpid = getpid (); |
1499 |
postfork = 1; |
1500 |
} |
1501 |
#endif |
1502 |
|
1503 |
#if EV_FORK_ENABLE |
1504 |
/* we might have forked, so queue fork handlers */ |
1505 |
if (expect_false (postfork)) |
1506 |
if (forkcnt) |
1507 |
{ |
1508 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
1509 |
call_pending (EV_A); |
1510 |
} |
1511 |
#endif |
1512 |
|
1513 |
/* queue prepare watchers (and execute them) */ |
1514 |
if (expect_false (preparecnt)) |
1515 |
{ |
1516 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
1517 |
call_pending (EV_A); |
1518 |
} |
1519 |
|
1520 |
if (expect_false (!activecnt)) |
1521 |
break; |
1522 |
|
1523 |
/* we might have forked, so reify kernel state if necessary */ |
1524 |
if (expect_false (postfork)) |
1525 |
loop_fork (EV_A); |
1526 |
|
1527 |
/* update fd-related kernel structures */ |
1528 |
fd_reify (EV_A); |
1529 |
|
1530 |
/* calculate blocking time */ |
1531 |
{ |
1532 |
ev_tstamp waittime = 0.; |
1533 |
ev_tstamp sleeptime = 0.; |
1534 |
|
1535 |
if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) |
1536 |
{ |
1537 |
/* update time to cancel out callback processing overhead */ |
1538 |
time_update (EV_A_ 1e100); |
1539 |
|
1540 |
waittime = MAX_BLOCKTIME; |
1541 |
|
1542 |
if (timercnt) |
1543 |
{ |
1544 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; |
1545 |
if (waittime > to) waittime = to; |
1546 |
} |
1547 |
|
1548 |
#if EV_PERIODIC_ENABLE |
1549 |
if (periodiccnt) |
1550 |
{ |
1551 |
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; |
1552 |
if (waittime > to) waittime = to; |
1553 |
} |
1554 |
#endif |
1555 |
|
1556 |
if (expect_false (waittime < timeout_blocktime)) |
1557 |
waittime = timeout_blocktime; |
1558 |
|
1559 |
sleeptime = waittime - backend_fudge; |
1560 |
|
1561 |
if (expect_true (sleeptime > io_blocktime)) |
1562 |
sleeptime = io_blocktime; |
1563 |
|
1564 |
if (sleeptime) |
1565 |
{ |
1566 |
ev_sleep (sleeptime); |
1567 |
waittime -= sleeptime; |
1568 |
} |
1569 |
} |
1570 |
|
1571 |
++loop_count; |
1572 |
backend_poll (EV_A_ waittime); |
1573 |
|
1574 |
/* update ev_rt_now, do magic */ |
1575 |
time_update (EV_A_ waittime + sleeptime); |
1576 |
} |
1577 |
|
1578 |
/* queue pending timers and reschedule them */ |
1579 |
timers_reify (EV_A); /* relative timers called last */ |
1580 |
#if EV_PERIODIC_ENABLE |
1581 |
periodics_reify (EV_A); /* absolute timers called first */ |
1582 |
#endif |
1583 |
|
1584 |
#if EV_IDLE_ENABLE |
1585 |
/* queue idle watchers unless other events are pending */ |
1586 |
idle_reify (EV_A); |
1587 |
#endif |
1588 |
|
1589 |
/* queue check watchers, to be executed first */ |
1590 |
if (expect_false (checkcnt)) |
1591 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
1592 |
|
1593 |
call_pending (EV_A); |
1594 |
|
1595 |
} |
1596 |
while (expect_true (activecnt && !loop_done)); |
1597 |
|
1598 |
if (loop_done == EVUNLOOP_ONE) |
1599 |
loop_done = EVUNLOOP_CANCEL; |
1600 |
} |
1601 |
|
1602 |
void |
1603 |
ev_unloop (EV_P_ int how) |
1604 |
{ |
1605 |
loop_done = how; |
1606 |
} |
1607 |
|
1608 |
/*****************************************************************************/ |
1609 |
|
1610 |
void inline_size |
1611 |
wlist_add (WL *head, WL elem) |
1612 |
{ |
1613 |
elem->next = *head; |
1614 |
*head = elem; |
1615 |
} |
1616 |
|
1617 |
void inline_size |
1618 |
wlist_del (WL *head, WL elem) |
1619 |
{ |
1620 |
while (*head) |
1621 |
{ |
1622 |
if (*head == elem) |
1623 |
{ |
1624 |
*head = elem->next; |
1625 |
return; |
1626 |
} |
1627 |
|
1628 |
head = &(*head)->next; |
1629 |
} |
1630 |
} |
1631 |
|
1632 |
void inline_speed |
1633 |
clear_pending (EV_P_ W w) |
1634 |
{ |
1635 |
if (w->pending) |
1636 |
{ |
1637 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
1638 |
w->pending = 0; |
1639 |
} |
1640 |
} |
1641 |
|
1642 |
int |
1643 |
ev_clear_pending (EV_P_ void *w) |
1644 |
{ |
1645 |
W w_ = (W)w; |
1646 |
int pending = w_->pending; |
1647 |
|
1648 |
if (expect_true (pending)) |
1649 |
{ |
1650 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
1651 |
w_->pending = 0; |
1652 |
p->w = 0; |
1653 |
return p->events; |
1654 |
} |
1655 |
else |
1656 |
return 0; |
1657 |
} |
1658 |
|
1659 |
void inline_size |
1660 |
pri_adjust (EV_P_ W w) |
1661 |
{ |
1662 |
int pri = w->priority; |
1663 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
1664 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
1665 |
w->priority = pri; |
1666 |
} |
1667 |
|
1668 |
void inline_speed |
1669 |
ev_start (EV_P_ W w, int active) |
1670 |
{ |
1671 |
pri_adjust (EV_A_ w); |
1672 |
w->active = active; |
1673 |
ev_ref (EV_A); |
1674 |
} |
1675 |
|
1676 |
void inline_size |
1677 |
ev_stop (EV_P_ W w) |
1678 |
{ |
1679 |
ev_unref (EV_A); |
1680 |
w->active = 0; |
1681 |
} |
1682 |
|
1683 |
/*****************************************************************************/ |
1684 |
|
1685 |
void noinline |
1686 |
ev_io_start (EV_P_ ev_io *w) |
1687 |
{ |
1688 |
int fd = w->fd; |
1689 |
|
1690 |
if (expect_false (ev_is_active (w))) |
1691 |
return; |
1692 |
|
1693 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
1694 |
|
1695 |
ev_start (EV_A_ (W)w, 1); |
1696 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
1697 |
wlist_add (&anfds[fd].head, (WL)w); |
1698 |
|
1699 |
fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); |
1700 |
w->events &= ~EV_IOFDSET; |
1701 |
} |
1702 |
|
1703 |
void noinline |
1704 |
ev_io_stop (EV_P_ ev_io *w) |
1705 |
{ |
1706 |
clear_pending (EV_A_ (W)w); |
1707 |
if (expect_false (!ev_is_active (w))) |
1708 |
return; |
1709 |
|
1710 |
assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
1711 |
|
1712 |
wlist_del (&anfds[w->fd].head, (WL)w); |
1713 |
ev_stop (EV_A_ (W)w); |
1714 |
|
1715 |
fd_change (EV_A_ w->fd, 1); |
1716 |
} |
1717 |
|
1718 |
void noinline |
1719 |
ev_timer_start (EV_P_ ev_timer *w) |
1720 |
{ |
1721 |
if (expect_false (ev_is_active (w))) |
1722 |
return; |
1723 |
|
1724 |
((WT)w)->at += mn_now; |
1725 |
|
1726 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
1727 |
|
1728 |
ev_start (EV_A_ (W)w, ++timercnt); |
1729 |
array_needsize (WT, timers, timermax, timercnt, EMPTY2); |
1730 |
timers [timercnt - 1] = (WT)w; |
1731 |
upheap (timers, timercnt - 1); |
1732 |
|
1733 |
/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ |
1734 |
} |
1735 |
|
1736 |
void noinline |
1737 |
ev_timer_stop (EV_P_ ev_timer *w) |
1738 |
{ |
1739 |
clear_pending (EV_A_ (W)w); |
1740 |
if (expect_false (!ev_is_active (w))) |
1741 |
return; |
1742 |
|
1743 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); |
1744 |
|
1745 |
{ |
1746 |
int active = ((W)w)->active; |
1747 |
|
1748 |
if (expect_true (--active < --timercnt)) |
1749 |
{ |
1750 |
timers [active] = timers [timercnt]; |
1751 |
adjustheap (timers, timercnt, active); |
1752 |
} |
1753 |
} |
1754 |
|
1755 |
((WT)w)->at -= mn_now; |
1756 |
|
1757 |
ev_stop (EV_A_ (W)w); |
1758 |
} |
1759 |
|
1760 |
void noinline |
1761 |
ev_timer_again (EV_P_ ev_timer *w) |
1762 |
{ |
1763 |
if (ev_is_active (w)) |
1764 |
{ |
1765 |
if (w->repeat) |
1766 |
{ |
1767 |
((WT)w)->at = mn_now + w->repeat; |
1768 |
adjustheap (timers, timercnt, ((W)w)->active - 1); |
1769 |
} |
1770 |
else |
1771 |
ev_timer_stop (EV_A_ w); |
1772 |
} |
1773 |
else if (w->repeat) |
1774 |
{ |
1775 |
w->at = w->repeat; |
1776 |
ev_timer_start (EV_A_ w); |
1777 |
} |
1778 |
} |
1779 |
|
1780 |
#if EV_PERIODIC_ENABLE |
1781 |
void noinline |
1782 |
ev_periodic_start (EV_P_ ev_periodic *w) |
1783 |
{ |
1784 |
if (expect_false (ev_is_active (w))) |
1785 |
return; |
1786 |
|
1787 |
if (w->reschedule_cb) |
1788 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1789 |
else if (w->interval) |
1790 |
{ |
1791 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
1792 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
1793 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1794 |
} |
1795 |
else |
1796 |
((WT)w)->at = w->offset; |
1797 |
|
1798 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
1799 |
array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); |
1800 |
periodics [periodiccnt - 1] = (WT)w; |
1801 |
upheap (periodics, periodiccnt - 1); |
1802 |
|
1803 |
/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ |
1804 |
} |
1805 |
|
1806 |
void noinline |
1807 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
1808 |
{ |
1809 |
clear_pending (EV_A_ (W)w); |
1810 |
if (expect_false (!ev_is_active (w))) |
1811 |
return; |
1812 |
|
1813 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); |
1814 |
|
1815 |
{ |
1816 |
int active = ((W)w)->active; |
1817 |
|
1818 |
if (expect_true (--active < --periodiccnt)) |
1819 |
{ |
1820 |
periodics [active] = periodics [periodiccnt]; |
1821 |
adjustheap (periodics, periodiccnt, active); |
1822 |
} |
1823 |
} |
1824 |
|
1825 |
ev_stop (EV_A_ (W)w); |
1826 |
} |
1827 |
|
1828 |
void noinline |
1829 |
ev_periodic_again (EV_P_ ev_periodic *w) |
1830 |
{ |
1831 |
/* TODO: use adjustheap and recalculation */ |
1832 |
ev_periodic_stop (EV_A_ w); |
1833 |
ev_periodic_start (EV_A_ w); |
1834 |
} |
1835 |
#endif |
1836 |
|
1837 |
#ifndef SA_RESTART |
1838 |
# define SA_RESTART 0 |
1839 |
#endif |
1840 |
|
1841 |
void noinline |
1842 |
ev_signal_start (EV_P_ ev_signal *w) |
1843 |
{ |
1844 |
#if EV_MULTIPLICITY |
1845 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1846 |
#endif |
1847 |
if (expect_false (ev_is_active (w))) |
1848 |
return; |
1849 |
|
1850 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
1851 |
|
1852 |
{ |
1853 |
#ifndef _WIN32 |
1854 |
sigset_t full, prev; |
1855 |
sigfillset (&full); |
1856 |
sigprocmask (SIG_SETMASK, &full, &prev); |
1857 |
#endif |
1858 |
|
1859 |
array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
1860 |
|
1861 |
#ifndef _WIN32 |
1862 |
sigprocmask (SIG_SETMASK, &prev, 0); |
1863 |
#endif |
1864 |
} |
1865 |
|
1866 |
ev_start (EV_A_ (W)w, 1); |
1867 |
wlist_add (&signals [w->signum - 1].head, (WL)w); |
1868 |
|
1869 |
if (!((WL)w)->next) |
1870 |
{ |
1871 |
#if _WIN32 |
1872 |
signal (w->signum, sighandler); |
1873 |
#else |
1874 |
struct sigaction sa; |
1875 |
sa.sa_handler = sighandler; |
1876 |
sigfillset (&sa.sa_mask); |
1877 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
1878 |
sigaction (w->signum, &sa, 0); |
1879 |
#endif |
1880 |
} |
1881 |
} |
1882 |
|
1883 |
void noinline |
1884 |
ev_signal_stop (EV_P_ ev_signal *w) |
1885 |
{ |
1886 |
clear_pending (EV_A_ (W)w); |
1887 |
if (expect_false (!ev_is_active (w))) |
1888 |
return; |
1889 |
|
1890 |
wlist_del (&signals [w->signum - 1].head, (WL)w); |
1891 |
ev_stop (EV_A_ (W)w); |
1892 |
|
1893 |
if (!signals [w->signum - 1].head) |
1894 |
signal (w->signum, SIG_DFL); |
1895 |
} |
1896 |
|
1897 |
void |
1898 |
ev_child_start (EV_P_ ev_child *w) |
1899 |
{ |
1900 |
#if EV_MULTIPLICITY |
1901 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1902 |
#endif |
1903 |
if (expect_false (ev_is_active (w))) |
1904 |
return; |
1905 |
|
1906 |
ev_start (EV_A_ (W)w, 1); |
1907 |
wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1908 |
} |
1909 |
|
1910 |
void |
1911 |
ev_child_stop (EV_P_ ev_child *w) |
1912 |
{ |
1913 |
clear_pending (EV_A_ (W)w); |
1914 |
if (expect_false (!ev_is_active (w))) |
1915 |
return; |
1916 |
|
1917 |
wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1918 |
ev_stop (EV_A_ (W)w); |
1919 |
} |
1920 |
|
1921 |
#if EV_STAT_ENABLE |
1922 |
|
1923 |
# ifdef _WIN32 |
1924 |
# undef lstat |
1925 |
# define lstat(a,b) _stati64 (a,b) |
1926 |
# endif |
1927 |
|
1928 |
#define DEF_STAT_INTERVAL 5.0074891 |
1929 |
#define MIN_STAT_INTERVAL 0.1074891 |
1930 |
|
1931 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
1932 |
|
1933 |
#if EV_USE_INOTIFY |
1934 |
# define EV_INOTIFY_BUFSIZE 8192 |
1935 |
|
1936 |
static void noinline |
1937 |
infy_add (EV_P_ ev_stat *w) |
1938 |
{ |
1939 |
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); |
1940 |
|
1941 |
if (w->wd < 0) |
1942 |
{ |
1943 |
ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
1944 |
|
1945 |
/* monitor some parent directory for speedup hints */ |
1946 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
1947 |
{ |
1948 |
char path [4096]; |
1949 |
strcpy (path, w->path); |
1950 |
|
1951 |
do |
1952 |
{ |
1953 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
1954 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
1955 |
|
1956 |
char *pend = strrchr (path, '/'); |
1957 |
|
1958 |
if (!pend) |
1959 |
break; /* whoops, no '/', complain to your admin */ |
1960 |
|
1961 |
*pend = 0; |
1962 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
1963 |
} |
1964 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
1965 |
} |
1966 |
} |
1967 |
else |
1968 |
ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ |
1969 |
|
1970 |
if (w->wd >= 0) |
1971 |
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
1972 |
} |
1973 |
|
1974 |
static void noinline |
1975 |
infy_del (EV_P_ ev_stat *w) |
1976 |
{ |
1977 |
int slot; |
1978 |
int wd = w->wd; |
1979 |
|
1980 |
if (wd < 0) |
1981 |
return; |
1982 |
|
1983 |
w->wd = -2; |
1984 |
slot = wd & (EV_INOTIFY_HASHSIZE - 1); |
1985 |
wlist_del (&fs_hash [slot].head, (WL)w); |
1986 |
|
1987 |
/* remove this watcher, if others are watching it, they will rearm */ |
1988 |
inotify_rm_watch (fs_fd, wd); |
1989 |
} |
1990 |
|
1991 |
static void noinline |
1992 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
1993 |
{ |
1994 |
if (slot < 0) |
1995 |
/* overflow, need to check for all hahs slots */ |
1996 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
1997 |
infy_wd (EV_A_ slot, wd, ev); |
1998 |
else |
1999 |
{ |
2000 |
WL w_; |
2001 |
|
2002 |
for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) |
2003 |
{ |
2004 |
ev_stat *w = (ev_stat *)w_; |
2005 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
2006 |
|
2007 |
if (w->wd == wd || wd == -1) |
2008 |
{ |
2009 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
2010 |
{ |
2011 |
w->wd = -1; |
2012 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2013 |
} |
2014 |
|
2015 |
stat_timer_cb (EV_A_ &w->timer, 0); |
2016 |
} |
2017 |
} |
2018 |
} |
2019 |
} |
2020 |
|
2021 |
static void |
2022 |
infy_cb (EV_P_ ev_io *w, int revents) |
2023 |
{ |
2024 |
char buf [EV_INOTIFY_BUFSIZE]; |
2025 |
struct inotify_event *ev = (struct inotify_event *)buf; |
2026 |
int ofs; |
2027 |
int len = read (fs_fd, buf, sizeof (buf)); |
2028 |
|
2029 |
for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
2030 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
2031 |
} |
2032 |
|
2033 |
void inline_size |
2034 |
infy_init (EV_P) |
2035 |
{ |
2036 |
if (fs_fd != -2) |
2037 |
return; |
2038 |
|
2039 |
fs_fd = inotify_init (); |
2040 |
|
2041 |
if (fs_fd >= 0) |
2042 |
{ |
2043 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2044 |
ev_set_priority (&fs_w, EV_MAXPRI); |
2045 |
ev_io_start (EV_A_ &fs_w); |
2046 |
} |
2047 |
} |
2048 |
|
2049 |
void inline_size |
2050 |
infy_fork (EV_P) |
2051 |
{ |
2052 |
int slot; |
2053 |
|
2054 |
if (fs_fd < 0) |
2055 |
return; |
2056 |
|
2057 |
close (fs_fd); |
2058 |
fs_fd = inotify_init (); |
2059 |
|
2060 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2061 |
{ |
2062 |
WL w_ = fs_hash [slot].head; |
2063 |
fs_hash [slot].head = 0; |
2064 |
|
2065 |
while (w_) |
2066 |
{ |
2067 |
ev_stat *w = (ev_stat *)w_; |
2068 |
w_ = w_->next; /* lets us add this watcher */ |
2069 |
|
2070 |
w->wd = -1; |
2071 |
|
2072 |
if (fs_fd >= 0) |
2073 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2074 |
else |
2075 |
ev_timer_start (EV_A_ &w->timer); |
2076 |
} |
2077 |
|
2078 |
} |
2079 |
} |
2080 |
|
2081 |
#endif |
2082 |
|
2083 |
void |
2084 |
ev_stat_stat (EV_P_ ev_stat *w) |
2085 |
{ |
2086 |
if (lstat (w->path, &w->attr) < 0) |
2087 |
w->attr.st_nlink = 0; |
2088 |
else if (!w->attr.st_nlink) |
2089 |
w->attr.st_nlink = 1; |
2090 |
} |
2091 |
|
2092 |
static void noinline |
2093 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
2094 |
{ |
2095 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
2096 |
|
2097 |
/* we copy this here each the time so that */ |
2098 |
/* prev has the old value when the callback gets invoked */ |
2099 |
w->prev = w->attr; |
2100 |
ev_stat_stat (EV_A_ w); |
2101 |
|
2102 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
2103 |
if ( |
2104 |
w->prev.st_dev != w->attr.st_dev |
2105 |
|| w->prev.st_ino != w->attr.st_ino |
2106 |
|| w->prev.st_mode != w->attr.st_mode |
2107 |
|| w->prev.st_nlink != w->attr.st_nlink |
2108 |
|| w->prev.st_uid != w->attr.st_uid |
2109 |
|| w->prev.st_gid != w->attr.st_gid |
2110 |
|| w->prev.st_rdev != w->attr.st_rdev |
2111 |
|| w->prev.st_size != w->attr.st_size |
2112 |
|| w->prev.st_atime != w->attr.st_atime |
2113 |
|| w->prev.st_mtime != w->attr.st_mtime |
2114 |
|| w->prev.st_ctime != w->attr.st_ctime |
2115 |
) { |
2116 |
#if EV_USE_INOTIFY |
2117 |
infy_del (EV_A_ w); |
2118 |
infy_add (EV_A_ w); |
2119 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
2120 |
#endif |
2121 |
|
2122 |
ev_feed_event (EV_A_ w, EV_STAT); |
2123 |
} |
2124 |
} |
2125 |
|
2126 |
void |
2127 |
ev_stat_start (EV_P_ ev_stat *w) |
2128 |
{ |
2129 |
if (expect_false (ev_is_active (w))) |
2130 |
return; |
2131 |
|
2132 |
/* since we use memcmp, we need to clear any padding data etc. */ |
2133 |
memset (&w->prev, 0, sizeof (ev_statdata)); |
2134 |
memset (&w->attr, 0, sizeof (ev_statdata)); |
2135 |
|
2136 |
ev_stat_stat (EV_A_ w); |
2137 |
|
2138 |
if (w->interval < MIN_STAT_INTERVAL) |
2139 |
w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL; |
2140 |
|
2141 |
ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); |
2142 |
ev_set_priority (&w->timer, ev_priority (w)); |
2143 |
|
2144 |
#if EV_USE_INOTIFY |
2145 |
infy_init (EV_A); |
2146 |
|
2147 |
if (fs_fd >= 0) |
2148 |
infy_add (EV_A_ w); |
2149 |
else |
2150 |
#endif |
2151 |
ev_timer_start (EV_A_ &w->timer); |
2152 |
|
2153 |
ev_start (EV_A_ (W)w, 1); |
2154 |
} |
2155 |
|
2156 |
void |
2157 |
ev_stat_stop (EV_P_ ev_stat *w) |
2158 |
{ |
2159 |
clear_pending (EV_A_ (W)w); |
2160 |
if (expect_false (!ev_is_active (w))) |
2161 |
return; |
2162 |
|
2163 |
#if EV_USE_INOTIFY |
2164 |
infy_del (EV_A_ w); |
2165 |
#endif |
2166 |
ev_timer_stop (EV_A_ &w->timer); |
2167 |
|
2168 |
ev_stop (EV_A_ (W)w); |
2169 |
} |
2170 |
#endif |
2171 |
|
2172 |
#if EV_IDLE_ENABLE |
2173 |
void |
2174 |
ev_idle_start (EV_P_ ev_idle *w) |
2175 |
{ |
2176 |
if (expect_false (ev_is_active (w))) |
2177 |
return; |
2178 |
|
2179 |
pri_adjust (EV_A_ (W)w); |
2180 |
|
2181 |
{ |
2182 |
int active = ++idlecnt [ABSPRI (w)]; |
2183 |
|
2184 |
++idleall; |
2185 |
ev_start (EV_A_ (W)w, active); |
2186 |
|
2187 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
2188 |
idles [ABSPRI (w)][active - 1] = w; |
2189 |
} |
2190 |
} |
2191 |
|
2192 |
void |
2193 |
ev_idle_stop (EV_P_ ev_idle *w) |
2194 |
{ |
2195 |
clear_pending (EV_A_ (W)w); |
2196 |
if (expect_false (!ev_is_active (w))) |
2197 |
return; |
2198 |
|
2199 |
{ |
2200 |
int active = ((W)w)->active; |
2201 |
|
2202 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
2203 |
((W)idles [ABSPRI (w)][active - 1])->active = active; |
2204 |
|
2205 |
ev_stop (EV_A_ (W)w); |
2206 |
--idleall; |
2207 |
} |
2208 |
} |
2209 |
#endif |
2210 |
|
2211 |
void |
2212 |
ev_prepare_start (EV_P_ ev_prepare *w) |
2213 |
{ |
2214 |
if (expect_false (ev_is_active (w))) |
2215 |
return; |
2216 |
|
2217 |
ev_start (EV_A_ (W)w, ++preparecnt); |
2218 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
2219 |
prepares [preparecnt - 1] = w; |
2220 |
} |
2221 |
|
2222 |
void |
2223 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
2224 |
{ |
2225 |
clear_pending (EV_A_ (W)w); |
2226 |
if (expect_false (!ev_is_active (w))) |
2227 |
return; |
2228 |
|
2229 |
{ |
2230 |
int active = ((W)w)->active; |
2231 |
prepares [active - 1] = prepares [--preparecnt]; |
2232 |
((W)prepares [active - 1])->active = active; |
2233 |
} |
2234 |
|
2235 |
ev_stop (EV_A_ (W)w); |
2236 |
} |
2237 |
|
2238 |
void |
2239 |
ev_check_start (EV_P_ ev_check *w) |
2240 |
{ |
2241 |
if (expect_false (ev_is_active (w))) |
2242 |
return; |
2243 |
|
2244 |
ev_start (EV_A_ (W)w, ++checkcnt); |
2245 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
2246 |
checks [checkcnt - 1] = w; |
2247 |
} |
2248 |
|
2249 |
void |
2250 |
ev_check_stop (EV_P_ ev_check *w) |
2251 |
{ |
2252 |
clear_pending (EV_A_ (W)w); |
2253 |
if (expect_false (!ev_is_active (w))) |
2254 |
return; |
2255 |
|
2256 |
{ |
2257 |
int active = ((W)w)->active; |
2258 |
checks [active - 1] = checks [--checkcnt]; |
2259 |
((W)checks [active - 1])->active = active; |
2260 |
} |
2261 |
|
2262 |
ev_stop (EV_A_ (W)w); |
2263 |
} |
2264 |
|
2265 |
#if EV_EMBED_ENABLE |
2266 |
void noinline |
2267 |
ev_embed_sweep (EV_P_ ev_embed *w) |
2268 |
{ |
2269 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
2270 |
} |
2271 |
|
2272 |
static void |
2273 |
embed_io_cb (EV_P_ ev_io *io, int revents) |
2274 |
{ |
2275 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
2276 |
|
2277 |
if (ev_cb (w)) |
2278 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
2279 |
else |
2280 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
2281 |
} |
2282 |
|
2283 |
static void |
2284 |
embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
2285 |
{ |
2286 |
ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
2287 |
|
2288 |
{ |
2289 |
struct ev_loop *loop = w->other; |
2290 |
|
2291 |
while (fdchangecnt) |
2292 |
{ |
2293 |
fd_reify (EV_A); |
2294 |
ev_loop (EV_A_ EVLOOP_NONBLOCK); |
2295 |
} |
2296 |
} |
2297 |
} |
2298 |
|
2299 |
#if 0 |
2300 |
static void |
2301 |
embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
2302 |
{ |
2303 |
ev_idle_stop (EV_A_ idle); |
2304 |
} |
2305 |
#endif |
2306 |
|
2307 |
void |
2308 |
ev_embed_start (EV_P_ ev_embed *w) |
2309 |
{ |
2310 |
if (expect_false (ev_is_active (w))) |
2311 |
return; |
2312 |
|
2313 |
{ |
2314 |
struct ev_loop *loop = w->other; |
2315 |
assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
2316 |
ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
2317 |
} |
2318 |
|
2319 |
ev_set_priority (&w->io, ev_priority (w)); |
2320 |
ev_io_start (EV_A_ &w->io); |
2321 |
|
2322 |
ev_prepare_init (&w->prepare, embed_prepare_cb); |
2323 |
ev_set_priority (&w->prepare, EV_MINPRI); |
2324 |
ev_prepare_start (EV_A_ &w->prepare); |
2325 |
|
2326 |
/*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
2327 |
|
2328 |
ev_start (EV_A_ (W)w, 1); |
2329 |
} |
2330 |
|
2331 |
void |
2332 |
ev_embed_stop (EV_P_ ev_embed *w) |
2333 |
{ |
2334 |
clear_pending (EV_A_ (W)w); |
2335 |
if (expect_false (!ev_is_active (w))) |
2336 |
return; |
2337 |
|
2338 |
ev_io_stop (EV_A_ &w->io); |
2339 |
ev_prepare_stop (EV_A_ &w->prepare); |
2340 |
|
2341 |
ev_stop (EV_A_ (W)w); |
2342 |
} |
2343 |
#endif |
2344 |
|
2345 |
#if EV_FORK_ENABLE |
2346 |
void |
2347 |
ev_fork_start (EV_P_ ev_fork *w) |
2348 |
{ |
2349 |
if (expect_false (ev_is_active (w))) |
2350 |
return; |
2351 |
|
2352 |
ev_start (EV_A_ (W)w, ++forkcnt); |
2353 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
2354 |
forks [forkcnt - 1] = w; |
2355 |
} |
2356 |
|
2357 |
void |
2358 |
ev_fork_stop (EV_P_ ev_fork *w) |
2359 |
{ |
2360 |
clear_pending (EV_A_ (W)w); |
2361 |
if (expect_false (!ev_is_active (w))) |
2362 |
return; |
2363 |
|
2364 |
{ |
2365 |
int active = ((W)w)->active; |
2366 |
forks [active - 1] = forks [--forkcnt]; |
2367 |
((W)forks [active - 1])->active = active; |
2368 |
} |
2369 |
|
2370 |
ev_stop (EV_A_ (W)w); |
2371 |
} |
2372 |
#endif |
2373 |
|
2374 |
/*****************************************************************************/ |
2375 |
|
2376 |
struct ev_once |
2377 |
{ |
2378 |
ev_io io; |
2379 |
ev_timer to; |
2380 |
void (*cb)(int revents, void *arg); |
2381 |
void *arg; |
2382 |
}; |
2383 |
|
2384 |
static void |
2385 |
once_cb (EV_P_ struct ev_once *once, int revents) |
2386 |
{ |
2387 |
void (*cb)(int revents, void *arg) = once->cb; |
2388 |
void *arg = once->arg; |
2389 |
|
2390 |
ev_io_stop (EV_A_ &once->io); |
2391 |
ev_timer_stop (EV_A_ &once->to); |
2392 |
ev_free (once); |
2393 |
|
2394 |
cb (revents, arg); |
2395 |
} |
2396 |
|
2397 |
static void |
2398 |
once_cb_io (EV_P_ ev_io *w, int revents) |
2399 |
{ |
2400 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
2401 |
} |
2402 |
|
2403 |
static void |
2404 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
2405 |
{ |
2406 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
2407 |
} |
2408 |
|
2409 |
void |
2410 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
2411 |
{ |
2412 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
2413 |
|
2414 |
if (expect_false (!once)) |
2415 |
{ |
2416 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
2417 |
return; |
2418 |
} |
2419 |
|
2420 |
once->cb = cb; |
2421 |
once->arg = arg; |
2422 |
|
2423 |
ev_init (&once->io, once_cb_io); |
2424 |
if (fd >= 0) |
2425 |
{ |
2426 |
ev_io_set (&once->io, fd, events); |
2427 |
ev_io_start (EV_A_ &once->io); |
2428 |
} |
2429 |
|
2430 |
ev_init (&once->to, once_cb_to); |
2431 |
if (timeout >= 0.) |
2432 |
{ |
2433 |
ev_timer_set (&once->to, timeout, 0.); |
2434 |
ev_timer_start (EV_A_ &once->to); |
2435 |
} |
2436 |
} |
2437 |
|
2438 |
#if EV_MULTIPLICITY |
2439 |
#include "ev_wrap.h" |
2440 |
#endif |
2441 |
|
2442 |
#ifdef __cplusplus |
2443 |
} |
2444 |
#endif |
2445 |
|