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/* |
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* libev event processing core, watcher management |
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* |
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* Copyright (c) 2007,2008 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 modifica- |
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* tion, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* the GNU General Public License ("GPL") version 2 or any later version, |
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* in which case the provisions of the GPL are applicable instead of |
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* the above. If you wish to allow the use of your version of this file |
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* only under the terms of the GPL and not to allow others to use your |
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* version of this file under the BSD license, indicate your decision |
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* by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL. If you do not delete the |
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* provisions above, a recipient may use your version of this file under |
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* either the BSD or the GPL. |
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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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/* this big block deduces configuration from config.h */ |
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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_SYSCALL |
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# ifndef EV_USE_CLOCK_SYSCALL |
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# define EV_USE_CLOCK_SYSCALL 1 |
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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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# ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 1 |
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# endif |
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# endif |
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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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# ifndef EV_USE_EVENTFD |
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# if HAVE_EVENTFD |
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# define EV_USE_EVENTFD 1 |
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# else |
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# define EV_USE_EVENTFD 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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# include <io.h> |
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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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/* this block tries to deduce configuration from header-defined symbols and defaults */ |
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|
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#ifndef EV_USE_CLOCK_SYSCALL |
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# if __linux && __GLIBC__ >= 2 |
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# define EV_USE_CLOCK_SYSCALL 1 |
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# else |
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# define EV_USE_CLOCK_SYSCALL 0 |
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# endif |
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#endif |
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|
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#ifndef EV_USE_MONOTONIC |
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# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 |
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# define EV_USE_MONOTONIC 1 |
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# else |
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# define EV_USE_MONOTONIC 0 |
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# endif |
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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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# if _POSIX_C_SOURCE >= 199309L |
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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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# 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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# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) |
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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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# 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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# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) |
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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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#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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#ifndef EV_USE_EVENTFD |
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# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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# define EV_USE_EVENTFD 1 |
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# else |
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# define EV_USE_EVENTFD 0 |
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# endif |
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#endif |
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|
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#if 0 /* debugging */ |
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# define EV_VERIFY 3 |
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# define EV_USE_4HEAP 1 |
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# define EV_HEAP_CACHE_AT 1 |
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#endif |
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|
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#ifndef EV_VERIFY |
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# define EV_VERIFY !EV_MINIMAL |
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#endif |
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|
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#ifndef EV_USE_4HEAP |
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# define EV_USE_4HEAP !EV_MINIMAL |
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#endif |
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|
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#ifndef EV_HEAP_CACHE_AT |
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# define EV_HEAP_CACHE_AT !EV_MINIMAL |
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#endif |
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|
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/* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
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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/utsname.h> |
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# include <sys/statfs.h> |
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# include <sys/inotify.h> |
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/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ |
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# ifndef IN_DONT_FOLLOW |
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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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#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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/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ |
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/* which makes programs even slower. might work on other unices, too. */ |
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#if EV_USE_CLOCK_SYSCALL |
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# include <syscall.h> |
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# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) |
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# undef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 1 |
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#endif |
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|
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#if EV_USE_EVENTFD |
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/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
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# include <stdint.h> |
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# ifdef __cplusplus |
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extern "C" { |
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# endif |
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int eventfd (unsigned int initval, int flags); |
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# ifdef __cplusplus |
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} |
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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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#if EV_VERIFY >= 3 |
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# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) |
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#else |
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# define EV_FREQUENT_CHECK do { } while (0) |
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#endif |
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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 |
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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 && __GNUC__ < 2 |
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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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#define ev_active(w) ((W)(w))->active |
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#define ev_at(w) ((WT)(w))->at |
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|
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#if EV_USE_MONOTONIC |
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/* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
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/* giving it a reasonably high chance of working on typical architetcures */ |
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static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
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#endif |
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|
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#ifdef _WIN32 |
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# include "ev_win32.c" |
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#endif |
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|
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/*****************************************************************************/ |
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|
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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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ev_syserr (const char *msg) |
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{ |
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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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{ |
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perror (msg); |
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abort (); |
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} |
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} |
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|
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static void * |
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ev_realloc_emul (void *ptr, long size) |
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{ |
440 |
/* some systems, notably openbsd and darwin, fail to properly |
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* implement realloc (x, 0) (as required by both ansi c-98 and |
442 |
* the single unix specification, so work around them here. |
443 |
*/ |
444 |
|
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if (size) |
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return realloc (ptr, size); |
447 |
|
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free (ptr); |
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return 0; |
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} |
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|
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static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; |
453 |
|
454 |
void |
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ev_set_allocator (void *(*cb)(void *ptr, long size)) |
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{ |
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alloc = cb; |
458 |
} |
459 |
|
460 |
inline_speed void * |
461 |
ev_realloc (void *ptr, long size) |
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{ |
463 |
ptr = alloc (ptr, size); |
464 |
|
465 |
if (!ptr && size) |
466 |
{ |
467 |
fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
468 |
abort (); |
469 |
} |
470 |
|
471 |
return ptr; |
472 |
} |
473 |
|
474 |
#define ev_malloc(size) ev_realloc (0, (size)) |
475 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
476 |
|
477 |
/*****************************************************************************/ |
478 |
|
479 |
typedef struct |
480 |
{ |
481 |
WL head; |
482 |
unsigned char events; |
483 |
unsigned char reify; |
484 |
unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ |
485 |
unsigned char unused; |
486 |
#if EV_USE_EPOLL |
487 |
unsigned int egen; /* generation counter to counter epoll bugs */ |
488 |
#endif |
489 |
#if EV_SELECT_IS_WINSOCKET |
490 |
SOCKET handle; |
491 |
#endif |
492 |
} ANFD; |
493 |
|
494 |
typedef struct |
495 |
{ |
496 |
W w; |
497 |
int events; |
498 |
} ANPENDING; |
499 |
|
500 |
#if EV_USE_INOTIFY |
501 |
/* hash table entry per inotify-id */ |
502 |
typedef struct |
503 |
{ |
504 |
WL head; |
505 |
} ANFS; |
506 |
#endif |
507 |
|
508 |
/* Heap Entry */ |
509 |
#if EV_HEAP_CACHE_AT |
510 |
typedef struct { |
511 |
ev_tstamp at; |
512 |
WT w; |
513 |
} ANHE; |
514 |
|
515 |
#define ANHE_w(he) (he).w /* access watcher, read-write */ |
516 |
#define ANHE_at(he) (he).at /* access cached at, read-only */ |
517 |
#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ |
518 |
#else |
519 |
typedef WT ANHE; |
520 |
|
521 |
#define ANHE_w(he) (he) |
522 |
#define ANHE_at(he) (he)->at |
523 |
#define ANHE_at_cache(he) |
524 |
#endif |
525 |
|
526 |
#if EV_MULTIPLICITY |
527 |
|
528 |
struct ev_loop |
529 |
{ |
530 |
ev_tstamp ev_rt_now; |
531 |
#define ev_rt_now ((loop)->ev_rt_now) |
532 |
#define VAR(name,decl) decl; |
533 |
#include "ev_vars.h" |
534 |
#undef VAR |
535 |
}; |
536 |
#include "ev_wrap.h" |
537 |
|
538 |
static struct ev_loop default_loop_struct; |
539 |
struct ev_loop *ev_default_loop_ptr; |
540 |
|
541 |
#else |
542 |
|
543 |
ev_tstamp ev_rt_now; |
544 |
#define VAR(name,decl) static decl; |
545 |
#include "ev_vars.h" |
546 |
#undef VAR |
547 |
|
548 |
static int ev_default_loop_ptr; |
549 |
|
550 |
#endif |
551 |
|
552 |
/*****************************************************************************/ |
553 |
|
554 |
ev_tstamp |
555 |
ev_time (void) |
556 |
{ |
557 |
#if EV_USE_REALTIME |
558 |
struct timespec ts; |
559 |
clock_gettime (CLOCK_REALTIME, &ts); |
560 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
561 |
#else |
562 |
struct timeval tv; |
563 |
gettimeofday (&tv, 0); |
564 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
565 |
#endif |
566 |
} |
567 |
|
568 |
ev_tstamp inline_size |
569 |
get_clock (void) |
570 |
{ |
571 |
#if EV_USE_MONOTONIC |
572 |
if (expect_true (have_monotonic)) |
573 |
{ |
574 |
struct timespec ts; |
575 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
576 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
577 |
} |
578 |
#endif |
579 |
|
580 |
return ev_time (); |
581 |
} |
582 |
|
583 |
#if EV_MULTIPLICITY |
584 |
ev_tstamp |
585 |
ev_now (EV_P) |
586 |
{ |
587 |
return ev_rt_now; |
588 |
} |
589 |
#endif |
590 |
|
591 |
void |
592 |
ev_sleep (ev_tstamp delay) |
593 |
{ |
594 |
if (delay > 0.) |
595 |
{ |
596 |
#if EV_USE_NANOSLEEP |
597 |
struct timespec ts; |
598 |
|
599 |
ts.tv_sec = (time_t)delay; |
600 |
ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); |
601 |
|
602 |
nanosleep (&ts, 0); |
603 |
#elif defined(_WIN32) |
604 |
Sleep ((unsigned long)(delay * 1e3)); |
605 |
#else |
606 |
struct timeval tv; |
607 |
|
608 |
tv.tv_sec = (time_t)delay; |
609 |
tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); |
610 |
|
611 |
/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ |
612 |
/* somehting nto guaranteed by newer posix versions, but guaranteed */ |
613 |
/* by older ones */ |
614 |
select (0, 0, 0, 0, &tv); |
615 |
#endif |
616 |
} |
617 |
} |
618 |
|
619 |
/*****************************************************************************/ |
620 |
|
621 |
#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
622 |
|
623 |
int inline_size |
624 |
array_nextsize (int elem, int cur, int cnt) |
625 |
{ |
626 |
int ncur = cur + 1; |
627 |
|
628 |
do |
629 |
ncur <<= 1; |
630 |
while (cnt > ncur); |
631 |
|
632 |
/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ |
633 |
if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) |
634 |
{ |
635 |
ncur *= elem; |
636 |
ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); |
637 |
ncur = ncur - sizeof (void *) * 4; |
638 |
ncur /= elem; |
639 |
} |
640 |
|
641 |
return ncur; |
642 |
} |
643 |
|
644 |
static noinline void * |
645 |
array_realloc (int elem, void *base, int *cur, int cnt) |
646 |
{ |
647 |
*cur = array_nextsize (elem, *cur, cnt); |
648 |
return ev_realloc (base, elem * *cur); |
649 |
} |
650 |
|
651 |
#define array_init_zero(base,count) \ |
652 |
memset ((void *)(base), 0, sizeof (*(base)) * (count)) |
653 |
|
654 |
#define array_needsize(type,base,cur,cnt,init) \ |
655 |
if (expect_false ((cnt) > (cur))) \ |
656 |
{ \ |
657 |
int ocur_ = (cur); \ |
658 |
(base) = (type *)array_realloc \ |
659 |
(sizeof (type), (base), &(cur), (cnt)); \ |
660 |
init ((base) + (ocur_), (cur) - ocur_); \ |
661 |
} |
662 |
|
663 |
#if 0 |
664 |
#define array_slim(type,stem) \ |
665 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
666 |
{ \ |
667 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
668 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
669 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
670 |
} |
671 |
#endif |
672 |
|
673 |
#define array_free(stem, idx) \ |
674 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
675 |
|
676 |
/*****************************************************************************/ |
677 |
|
678 |
void noinline |
679 |
ev_feed_event (EV_P_ void *w, int revents) |
680 |
{ |
681 |
W w_ = (W)w; |
682 |
int pri = ABSPRI (w_); |
683 |
|
684 |
if (expect_false (w_->pending)) |
685 |
pendings [pri][w_->pending - 1].events |= revents; |
686 |
else |
687 |
{ |
688 |
w_->pending = ++pendingcnt [pri]; |
689 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
690 |
pendings [pri][w_->pending - 1].w = w_; |
691 |
pendings [pri][w_->pending - 1].events = revents; |
692 |
} |
693 |
} |
694 |
|
695 |
void inline_speed |
696 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
697 |
{ |
698 |
int i; |
699 |
|
700 |
for (i = 0; i < eventcnt; ++i) |
701 |
ev_feed_event (EV_A_ events [i], type); |
702 |
} |
703 |
|
704 |
/*****************************************************************************/ |
705 |
|
706 |
void inline_speed |
707 |
fd_event (EV_P_ int fd, int revents) |
708 |
{ |
709 |
ANFD *anfd = anfds + fd; |
710 |
ev_io *w; |
711 |
|
712 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
713 |
{ |
714 |
int ev = w->events & revents; |
715 |
|
716 |
if (ev) |
717 |
ev_feed_event (EV_A_ (W)w, ev); |
718 |
} |
719 |
} |
720 |
|
721 |
void |
722 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
723 |
{ |
724 |
if (fd >= 0 && fd < anfdmax) |
725 |
fd_event (EV_A_ fd, revents); |
726 |
} |
727 |
|
728 |
void inline_size |
729 |
fd_reify (EV_P) |
730 |
{ |
731 |
int i; |
732 |
|
733 |
for (i = 0; i < fdchangecnt; ++i) |
734 |
{ |
735 |
int fd = fdchanges [i]; |
736 |
ANFD *anfd = anfds + fd; |
737 |
ev_io *w; |
738 |
|
739 |
unsigned char events = 0; |
740 |
|
741 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
742 |
events |= (unsigned char)w->events; |
743 |
|
744 |
#if EV_SELECT_IS_WINSOCKET |
745 |
if (events) |
746 |
{ |
747 |
unsigned long arg; |
748 |
#ifdef EV_FD_TO_WIN32_HANDLE |
749 |
anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
750 |
#else |
751 |
anfd->handle = _get_osfhandle (fd); |
752 |
#endif |
753 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
754 |
} |
755 |
#endif |
756 |
|
757 |
{ |
758 |
unsigned char o_events = anfd->events; |
759 |
unsigned char o_reify = anfd->reify; |
760 |
|
761 |
anfd->reify = 0; |
762 |
anfd->events = events; |
763 |
|
764 |
if (o_events != events || o_reify & EV_IOFDSET) |
765 |
backend_modify (EV_A_ fd, o_events, events); |
766 |
} |
767 |
} |
768 |
|
769 |
fdchangecnt = 0; |
770 |
} |
771 |
|
772 |
void inline_size |
773 |
fd_change (EV_P_ int fd, int flags) |
774 |
{ |
775 |
unsigned char reify = anfds [fd].reify; |
776 |
anfds [fd].reify |= flags; |
777 |
|
778 |
if (expect_true (!reify)) |
779 |
{ |
780 |
++fdchangecnt; |
781 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
782 |
fdchanges [fdchangecnt - 1] = fd; |
783 |
} |
784 |
} |
785 |
|
786 |
void inline_speed |
787 |
fd_kill (EV_P_ int fd) |
788 |
{ |
789 |
ev_io *w; |
790 |
|
791 |
while ((w = (ev_io *)anfds [fd].head)) |
792 |
{ |
793 |
ev_io_stop (EV_A_ w); |
794 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
795 |
} |
796 |
} |
797 |
|
798 |
int inline_size |
799 |
fd_valid (int fd) |
800 |
{ |
801 |
#ifdef _WIN32 |
802 |
return _get_osfhandle (fd) != -1; |
803 |
#else |
804 |
return fcntl (fd, F_GETFD) != -1; |
805 |
#endif |
806 |
} |
807 |
|
808 |
/* called on EBADF to verify fds */ |
809 |
static void noinline |
810 |
fd_ebadf (EV_P) |
811 |
{ |
812 |
int fd; |
813 |
|
814 |
for (fd = 0; fd < anfdmax; ++fd) |
815 |
if (anfds [fd].events) |
816 |
if (!fd_valid (fd) && errno == EBADF) |
817 |
fd_kill (EV_A_ fd); |
818 |
} |
819 |
|
820 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
821 |
static void noinline |
822 |
fd_enomem (EV_P) |
823 |
{ |
824 |
int fd; |
825 |
|
826 |
for (fd = anfdmax; fd--; ) |
827 |
if (anfds [fd].events) |
828 |
{ |
829 |
fd_kill (EV_A_ fd); |
830 |
return; |
831 |
} |
832 |
} |
833 |
|
834 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
835 |
static void noinline |
836 |
fd_rearm_all (EV_P) |
837 |
{ |
838 |
int fd; |
839 |
|
840 |
for (fd = 0; fd < anfdmax; ++fd) |
841 |
if (anfds [fd].events) |
842 |
{ |
843 |
anfds [fd].events = 0; |
844 |
anfds [fd].emask = 0; |
845 |
fd_change (EV_A_ fd, EV_IOFDSET | 1); |
846 |
} |
847 |
} |
848 |
|
849 |
/*****************************************************************************/ |
850 |
|
851 |
/* |
852 |
* the heap functions want a real array index. array index 0 uis guaranteed to not |
853 |
* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives |
854 |
* the branching factor of the d-tree. |
855 |
*/ |
856 |
|
857 |
/* |
858 |
* at the moment we allow libev the luxury of two heaps, |
859 |
* a small-code-size 2-heap one and a ~1.5kb larger 4-heap |
860 |
* which is more cache-efficient. |
861 |
* the difference is about 5% with 50000+ watchers. |
862 |
*/ |
863 |
#if EV_USE_4HEAP |
864 |
|
865 |
#define DHEAP 4 |
866 |
#define HEAP0 (DHEAP - 1) /* index of first element in heap */ |
867 |
#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) |
868 |
#define UPHEAP_DONE(p,k) ((p) == (k)) |
869 |
|
870 |
/* away from the root */ |
871 |
void inline_speed |
872 |
downheap (ANHE *heap, int N, int k) |
873 |
{ |
874 |
ANHE he = heap [k]; |
875 |
ANHE *E = heap + N + HEAP0; |
876 |
|
877 |
for (;;) |
878 |
{ |
879 |
ev_tstamp minat; |
880 |
ANHE *minpos; |
881 |
ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; |
882 |
|
883 |
/* find minimum child */ |
884 |
if (expect_true (pos + DHEAP - 1 < E)) |
885 |
{ |
886 |
/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
887 |
if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
888 |
if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
889 |
if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
890 |
} |
891 |
else if (pos < E) |
892 |
{ |
893 |
/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
894 |
if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
895 |
if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
896 |
if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
897 |
} |
898 |
else |
899 |
break; |
900 |
|
901 |
if (ANHE_at (he) <= minat) |
902 |
break; |
903 |
|
904 |
heap [k] = *minpos; |
905 |
ev_active (ANHE_w (*minpos)) = k; |
906 |
|
907 |
k = minpos - heap; |
908 |
} |
909 |
|
910 |
heap [k] = he; |
911 |
ev_active (ANHE_w (he)) = k; |
912 |
} |
913 |
|
914 |
#else /* 4HEAP */ |
915 |
|
916 |
#define HEAP0 1 |
917 |
#define HPARENT(k) ((k) >> 1) |
918 |
#define UPHEAP_DONE(p,k) (!(p)) |
919 |
|
920 |
/* away from the root */ |
921 |
void inline_speed |
922 |
downheap (ANHE *heap, int N, int k) |
923 |
{ |
924 |
ANHE he = heap [k]; |
925 |
|
926 |
for (;;) |
927 |
{ |
928 |
int c = k << 1; |
929 |
|
930 |
if (c > N + HEAP0 - 1) |
931 |
break; |
932 |
|
933 |
c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) |
934 |
? 1 : 0; |
935 |
|
936 |
if (ANHE_at (he) <= ANHE_at (heap [c])) |
937 |
break; |
938 |
|
939 |
heap [k] = heap [c]; |
940 |
ev_active (ANHE_w (heap [k])) = k; |
941 |
|
942 |
k = c; |
943 |
} |
944 |
|
945 |
heap [k] = he; |
946 |
ev_active (ANHE_w (he)) = k; |
947 |
} |
948 |
#endif |
949 |
|
950 |
/* towards the root */ |
951 |
void inline_speed |
952 |
upheap (ANHE *heap, int k) |
953 |
{ |
954 |
ANHE he = heap [k]; |
955 |
|
956 |
for (;;) |
957 |
{ |
958 |
int p = HPARENT (k); |
959 |
|
960 |
if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) |
961 |
break; |
962 |
|
963 |
heap [k] = heap [p]; |
964 |
ev_active (ANHE_w (heap [k])) = k; |
965 |
k = p; |
966 |
} |
967 |
|
968 |
heap [k] = he; |
969 |
ev_active (ANHE_w (he)) = k; |
970 |
} |
971 |
|
972 |
void inline_size |
973 |
adjustheap (ANHE *heap, int N, int k) |
974 |
{ |
975 |
if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) |
976 |
upheap (heap, k); |
977 |
else |
978 |
downheap (heap, N, k); |
979 |
} |
980 |
|
981 |
/* rebuild the heap: this function is used only once and executed rarely */ |
982 |
void inline_size |
983 |
reheap (ANHE *heap, int N) |
984 |
{ |
985 |
int i; |
986 |
|
987 |
/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ |
988 |
/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ |
989 |
for (i = 0; i < N; ++i) |
990 |
upheap (heap, i + HEAP0); |
991 |
} |
992 |
|
993 |
/*****************************************************************************/ |
994 |
|
995 |
typedef struct |
996 |
{ |
997 |
WL head; |
998 |
EV_ATOMIC_T gotsig; |
999 |
} ANSIG; |
1000 |
|
1001 |
static ANSIG *signals; |
1002 |
static int signalmax; |
1003 |
|
1004 |
static EV_ATOMIC_T gotsig; |
1005 |
|
1006 |
/*****************************************************************************/ |
1007 |
|
1008 |
void inline_speed |
1009 |
fd_intern (int fd) |
1010 |
{ |
1011 |
#ifdef _WIN32 |
1012 |
unsigned long arg = 1; |
1013 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
1014 |
#else |
1015 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
1016 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
1017 |
#endif |
1018 |
} |
1019 |
|
1020 |
static void noinline |
1021 |
evpipe_init (EV_P) |
1022 |
{ |
1023 |
if (!ev_is_active (&pipeev)) |
1024 |
{ |
1025 |
#if EV_USE_EVENTFD |
1026 |
if ((evfd = eventfd (0, 0)) >= 0) |
1027 |
{ |
1028 |
evpipe [0] = -1; |
1029 |
fd_intern (evfd); |
1030 |
ev_io_set (&pipeev, evfd, EV_READ); |
1031 |
} |
1032 |
else |
1033 |
#endif |
1034 |
{ |
1035 |
while (pipe (evpipe)) |
1036 |
ev_syserr ("(libev) error creating signal/async pipe"); |
1037 |
|
1038 |
fd_intern (evpipe [0]); |
1039 |
fd_intern (evpipe [1]); |
1040 |
ev_io_set (&pipeev, evpipe [0], EV_READ); |
1041 |
} |
1042 |
|
1043 |
ev_io_start (EV_A_ &pipeev); |
1044 |
ev_unref (EV_A); /* watcher should not keep loop alive */ |
1045 |
} |
1046 |
} |
1047 |
|
1048 |
void inline_size |
1049 |
evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
1050 |
{ |
1051 |
if (!*flag) |
1052 |
{ |
1053 |
int old_errno = errno; /* save errno because write might clobber it */ |
1054 |
|
1055 |
*flag = 1; |
1056 |
|
1057 |
#if EV_USE_EVENTFD |
1058 |
if (evfd >= 0) |
1059 |
{ |
1060 |
uint64_t counter = 1; |
1061 |
write (evfd, &counter, sizeof (uint64_t)); |
1062 |
} |
1063 |
else |
1064 |
#endif |
1065 |
write (evpipe [1], &old_errno, 1); |
1066 |
|
1067 |
errno = old_errno; |
1068 |
} |
1069 |
} |
1070 |
|
1071 |
static void |
1072 |
pipecb (EV_P_ ev_io *iow, int revents) |
1073 |
{ |
1074 |
#if EV_USE_EVENTFD |
1075 |
if (evfd >= 0) |
1076 |
{ |
1077 |
uint64_t counter; |
1078 |
read (evfd, &counter, sizeof (uint64_t)); |
1079 |
} |
1080 |
else |
1081 |
#endif |
1082 |
{ |
1083 |
char dummy; |
1084 |
read (evpipe [0], &dummy, 1); |
1085 |
} |
1086 |
|
1087 |
if (gotsig && ev_is_default_loop (EV_A)) |
1088 |
{ |
1089 |
int signum; |
1090 |
gotsig = 0; |
1091 |
|
1092 |
for (signum = signalmax; signum--; ) |
1093 |
if (signals [signum].gotsig) |
1094 |
ev_feed_signal_event (EV_A_ signum + 1); |
1095 |
} |
1096 |
|
1097 |
#if EV_ASYNC_ENABLE |
1098 |
if (gotasync) |
1099 |
{ |
1100 |
int i; |
1101 |
gotasync = 0; |
1102 |
|
1103 |
for (i = asynccnt; i--; ) |
1104 |
if (asyncs [i]->sent) |
1105 |
{ |
1106 |
asyncs [i]->sent = 0; |
1107 |
ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
1108 |
} |
1109 |
} |
1110 |
#endif |
1111 |
} |
1112 |
|
1113 |
/*****************************************************************************/ |
1114 |
|
1115 |
static void |
1116 |
ev_sighandler (int signum) |
1117 |
{ |
1118 |
#if EV_MULTIPLICITY |
1119 |
struct ev_loop *loop = &default_loop_struct; |
1120 |
#endif |
1121 |
|
1122 |
#if _WIN32 |
1123 |
signal (signum, ev_sighandler); |
1124 |
#endif |
1125 |
|
1126 |
signals [signum - 1].gotsig = 1; |
1127 |
evpipe_write (EV_A_ &gotsig); |
1128 |
} |
1129 |
|
1130 |
void noinline |
1131 |
ev_feed_signal_event (EV_P_ int signum) |
1132 |
{ |
1133 |
WL w; |
1134 |
|
1135 |
#if EV_MULTIPLICITY |
1136 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
1137 |
#endif |
1138 |
|
1139 |
--signum; |
1140 |
|
1141 |
if (signum < 0 || signum >= signalmax) |
1142 |
return; |
1143 |
|
1144 |
signals [signum].gotsig = 0; |
1145 |
|
1146 |
for (w = signals [signum].head; w; w = w->next) |
1147 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
1148 |
} |
1149 |
|
1150 |
/*****************************************************************************/ |
1151 |
|
1152 |
static WL childs [EV_PID_HASHSIZE]; |
1153 |
|
1154 |
#ifndef _WIN32 |
1155 |
|
1156 |
static ev_signal childev; |
1157 |
|
1158 |
#ifndef WIFCONTINUED |
1159 |
# define WIFCONTINUED(status) 0 |
1160 |
#endif |
1161 |
|
1162 |
void inline_speed |
1163 |
child_reap (EV_P_ int chain, int pid, int status) |
1164 |
{ |
1165 |
ev_child *w; |
1166 |
int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
1167 |
|
1168 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
1169 |
{ |
1170 |
if ((w->pid == pid || !w->pid) |
1171 |
&& (!traced || (w->flags & 1))) |
1172 |
{ |
1173 |
ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ |
1174 |
w->rpid = pid; |
1175 |
w->rstatus = status; |
1176 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
1177 |
} |
1178 |
} |
1179 |
} |
1180 |
|
1181 |
#ifndef WCONTINUED |
1182 |
# define WCONTINUED 0 |
1183 |
#endif |
1184 |
|
1185 |
static void |
1186 |
childcb (EV_P_ ev_signal *sw, int revents) |
1187 |
{ |
1188 |
int pid, status; |
1189 |
|
1190 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
1191 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
1192 |
if (!WCONTINUED |
1193 |
|| errno != EINVAL |
1194 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
1195 |
return; |
1196 |
|
1197 |
/* make sure we are called again until all children have been reaped */ |
1198 |
/* we need to do it this way so that the callback gets called before we continue */ |
1199 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
1200 |
|
1201 |
child_reap (EV_A_ pid, pid, status); |
1202 |
if (EV_PID_HASHSIZE > 1) |
1203 |
child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
1204 |
} |
1205 |
|
1206 |
#endif |
1207 |
|
1208 |
/*****************************************************************************/ |
1209 |
|
1210 |
#if EV_USE_PORT |
1211 |
# include "ev_port.c" |
1212 |
#endif |
1213 |
#if EV_USE_KQUEUE |
1214 |
# include "ev_kqueue.c" |
1215 |
#endif |
1216 |
#if EV_USE_EPOLL |
1217 |
# include "ev_epoll.c" |
1218 |
#endif |
1219 |
#if EV_USE_POLL |
1220 |
# include "ev_poll.c" |
1221 |
#endif |
1222 |
#if EV_USE_SELECT |
1223 |
# include "ev_select.c" |
1224 |
#endif |
1225 |
|
1226 |
int |
1227 |
ev_version_major (void) |
1228 |
{ |
1229 |
return EV_VERSION_MAJOR; |
1230 |
} |
1231 |
|
1232 |
int |
1233 |
ev_version_minor (void) |
1234 |
{ |
1235 |
return EV_VERSION_MINOR; |
1236 |
} |
1237 |
|
1238 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
1239 |
int inline_size |
1240 |
enable_secure (void) |
1241 |
{ |
1242 |
#ifdef _WIN32 |
1243 |
return 0; |
1244 |
#else |
1245 |
return getuid () != geteuid () |
1246 |
|| getgid () != getegid (); |
1247 |
#endif |
1248 |
} |
1249 |
|
1250 |
unsigned int |
1251 |
ev_supported_backends (void) |
1252 |
{ |
1253 |
unsigned int flags = 0; |
1254 |
|
1255 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
1256 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
1257 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
1258 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
1259 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
1260 |
|
1261 |
return flags; |
1262 |
} |
1263 |
|
1264 |
unsigned int |
1265 |
ev_recommended_backends (void) |
1266 |
{ |
1267 |
unsigned int flags = ev_supported_backends (); |
1268 |
|
1269 |
#ifndef __NetBSD__ |
1270 |
/* kqueue is borked on everything but netbsd apparently */ |
1271 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
1272 |
flags &= ~EVBACKEND_KQUEUE; |
1273 |
#endif |
1274 |
#ifdef __APPLE__ |
1275 |
// flags &= ~EVBACKEND_KQUEUE; for documentation |
1276 |
flags &= ~EVBACKEND_POLL; |
1277 |
#endif |
1278 |
|
1279 |
return flags; |
1280 |
} |
1281 |
|
1282 |
unsigned int |
1283 |
ev_embeddable_backends (void) |
1284 |
{ |
1285 |
int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
1286 |
|
1287 |
/* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
1288 |
/* please fix it and tell me how to detect the fix */ |
1289 |
flags &= ~EVBACKEND_EPOLL; |
1290 |
|
1291 |
return flags; |
1292 |
} |
1293 |
|
1294 |
unsigned int |
1295 |
ev_backend (EV_P) |
1296 |
{ |
1297 |
return backend; |
1298 |
} |
1299 |
|
1300 |
unsigned int |
1301 |
ev_loop_count (EV_P) |
1302 |
{ |
1303 |
return loop_count; |
1304 |
} |
1305 |
|
1306 |
void |
1307 |
ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
1308 |
{ |
1309 |
io_blocktime = interval; |
1310 |
} |
1311 |
|
1312 |
void |
1313 |
ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
1314 |
{ |
1315 |
timeout_blocktime = interval; |
1316 |
} |
1317 |
|
1318 |
static void noinline |
1319 |
loop_init (EV_P_ unsigned int flags) |
1320 |
{ |
1321 |
if (!backend) |
1322 |
{ |
1323 |
#if EV_USE_MONOTONIC |
1324 |
{ |
1325 |
struct timespec ts; |
1326 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
1327 |
have_monotonic = 1; |
1328 |
} |
1329 |
#endif |
1330 |
|
1331 |
ev_rt_now = ev_time (); |
1332 |
mn_now = get_clock (); |
1333 |
now_floor = mn_now; |
1334 |
rtmn_diff = ev_rt_now - mn_now; |
1335 |
|
1336 |
io_blocktime = 0.; |
1337 |
timeout_blocktime = 0.; |
1338 |
backend = 0; |
1339 |
backend_fd = -1; |
1340 |
gotasync = 0; |
1341 |
#if EV_USE_INOTIFY |
1342 |
fs_fd = -2; |
1343 |
#endif |
1344 |
|
1345 |
/* pid check not overridable via env */ |
1346 |
#ifndef _WIN32 |
1347 |
if (flags & EVFLAG_FORKCHECK) |
1348 |
curpid = getpid (); |
1349 |
#endif |
1350 |
|
1351 |
if (!(flags & EVFLAG_NOENV) |
1352 |
&& !enable_secure () |
1353 |
&& getenv ("LIBEV_FLAGS")) |
1354 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
1355 |
|
1356 |
if (!(flags & 0x0000ffffU)) |
1357 |
flags |= ev_recommended_backends (); |
1358 |
|
1359 |
#if EV_USE_PORT |
1360 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
1361 |
#endif |
1362 |
#if EV_USE_KQUEUE |
1363 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
1364 |
#endif |
1365 |
#if EV_USE_EPOLL |
1366 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
1367 |
#endif |
1368 |
#if EV_USE_POLL |
1369 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
1370 |
#endif |
1371 |
#if EV_USE_SELECT |
1372 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
1373 |
#endif |
1374 |
|
1375 |
ev_init (&pipeev, pipecb); |
1376 |
ev_set_priority (&pipeev, EV_MAXPRI); |
1377 |
} |
1378 |
} |
1379 |
|
1380 |
static void noinline |
1381 |
loop_destroy (EV_P) |
1382 |
{ |
1383 |
int i; |
1384 |
|
1385 |
if (ev_is_active (&pipeev)) |
1386 |
{ |
1387 |
ev_ref (EV_A); /* signal watcher */ |
1388 |
ev_io_stop (EV_A_ &pipeev); |
1389 |
|
1390 |
#if EV_USE_EVENTFD |
1391 |
if (evfd >= 0) |
1392 |
close (evfd); |
1393 |
#endif |
1394 |
|
1395 |
if (evpipe [0] >= 0) |
1396 |
{ |
1397 |
close (evpipe [0]); |
1398 |
close (evpipe [1]); |
1399 |
} |
1400 |
} |
1401 |
|
1402 |
#if EV_USE_INOTIFY |
1403 |
if (fs_fd >= 0) |
1404 |
close (fs_fd); |
1405 |
#endif |
1406 |
|
1407 |
if (backend_fd >= 0) |
1408 |
close (backend_fd); |
1409 |
|
1410 |
#if EV_USE_PORT |
1411 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
1412 |
#endif |
1413 |
#if EV_USE_KQUEUE |
1414 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
1415 |
#endif |
1416 |
#if EV_USE_EPOLL |
1417 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1418 |
#endif |
1419 |
#if EV_USE_POLL |
1420 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1421 |
#endif |
1422 |
#if EV_USE_SELECT |
1423 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1424 |
#endif |
1425 |
|
1426 |
for (i = NUMPRI; i--; ) |
1427 |
{ |
1428 |
array_free (pending, [i]); |
1429 |
#if EV_IDLE_ENABLE |
1430 |
array_free (idle, [i]); |
1431 |
#endif |
1432 |
} |
1433 |
|
1434 |
ev_free (anfds); anfdmax = 0; |
1435 |
|
1436 |
/* have to use the microsoft-never-gets-it-right macro */ |
1437 |
array_free (fdchange, EMPTY); |
1438 |
array_free (timer, EMPTY); |
1439 |
#if EV_PERIODIC_ENABLE |
1440 |
array_free (periodic, EMPTY); |
1441 |
#endif |
1442 |
#if EV_FORK_ENABLE |
1443 |
array_free (fork, EMPTY); |
1444 |
#endif |
1445 |
array_free (prepare, EMPTY); |
1446 |
array_free (check, EMPTY); |
1447 |
#if EV_ASYNC_ENABLE |
1448 |
array_free (async, EMPTY); |
1449 |
#endif |
1450 |
|
1451 |
backend = 0; |
1452 |
} |
1453 |
|
1454 |
#if EV_USE_INOTIFY |
1455 |
void inline_size infy_fork (EV_P); |
1456 |
#endif |
1457 |
|
1458 |
void inline_size |
1459 |
loop_fork (EV_P) |
1460 |
{ |
1461 |
#if EV_USE_PORT |
1462 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1463 |
#endif |
1464 |
#if EV_USE_KQUEUE |
1465 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1466 |
#endif |
1467 |
#if EV_USE_EPOLL |
1468 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1469 |
#endif |
1470 |
#if EV_USE_INOTIFY |
1471 |
infy_fork (EV_A); |
1472 |
#endif |
1473 |
|
1474 |
if (ev_is_active (&pipeev)) |
1475 |
{ |
1476 |
/* this "locks" the handlers against writing to the pipe */ |
1477 |
/* while we modify the fd vars */ |
1478 |
gotsig = 1; |
1479 |
#if EV_ASYNC_ENABLE |
1480 |
gotasync = 1; |
1481 |
#endif |
1482 |
|
1483 |
ev_ref (EV_A); |
1484 |
ev_io_stop (EV_A_ &pipeev); |
1485 |
|
1486 |
#if EV_USE_EVENTFD |
1487 |
if (evfd >= 0) |
1488 |
close (evfd); |
1489 |
#endif |
1490 |
|
1491 |
if (evpipe [0] >= 0) |
1492 |
{ |
1493 |
close (evpipe [0]); |
1494 |
close (evpipe [1]); |
1495 |
} |
1496 |
|
1497 |
evpipe_init (EV_A); |
1498 |
/* now iterate over everything, in case we missed something */ |
1499 |
pipecb (EV_A_ &pipeev, EV_READ); |
1500 |
} |
1501 |
|
1502 |
postfork = 0; |
1503 |
} |
1504 |
|
1505 |
#if EV_MULTIPLICITY |
1506 |
|
1507 |
struct ev_loop * |
1508 |
ev_loop_new (unsigned int flags) |
1509 |
{ |
1510 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1511 |
|
1512 |
memset (loop, 0, sizeof (struct ev_loop)); |
1513 |
|
1514 |
loop_init (EV_A_ flags); |
1515 |
|
1516 |
if (ev_backend (EV_A)) |
1517 |
return loop; |
1518 |
|
1519 |
return 0; |
1520 |
} |
1521 |
|
1522 |
void |
1523 |
ev_loop_destroy (EV_P) |
1524 |
{ |
1525 |
loop_destroy (EV_A); |
1526 |
ev_free (loop); |
1527 |
} |
1528 |
|
1529 |
void |
1530 |
ev_loop_fork (EV_P) |
1531 |
{ |
1532 |
postfork = 1; /* must be in line with ev_default_fork */ |
1533 |
} |
1534 |
|
1535 |
#if EV_VERIFY |
1536 |
static void noinline |
1537 |
verify_watcher (EV_P_ W w) |
1538 |
{ |
1539 |
assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); |
1540 |
|
1541 |
if (w->pending) |
1542 |
assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); |
1543 |
} |
1544 |
|
1545 |
static void noinline |
1546 |
verify_heap (EV_P_ ANHE *heap, int N) |
1547 |
{ |
1548 |
int i; |
1549 |
|
1550 |
for (i = HEAP0; i < N + HEAP0; ++i) |
1551 |
{ |
1552 |
assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); |
1553 |
assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); |
1554 |
assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); |
1555 |
|
1556 |
verify_watcher (EV_A_ (W)ANHE_w (heap [i])); |
1557 |
} |
1558 |
} |
1559 |
|
1560 |
static void noinline |
1561 |
array_verify (EV_P_ W *ws, int cnt) |
1562 |
{ |
1563 |
while (cnt--) |
1564 |
{ |
1565 |
assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); |
1566 |
verify_watcher (EV_A_ ws [cnt]); |
1567 |
} |
1568 |
} |
1569 |
#endif |
1570 |
|
1571 |
void |
1572 |
ev_loop_verify (EV_P) |
1573 |
{ |
1574 |
#if EV_VERIFY |
1575 |
int i; |
1576 |
WL w; |
1577 |
|
1578 |
assert (activecnt >= -1); |
1579 |
|
1580 |
assert (fdchangemax >= fdchangecnt); |
1581 |
for (i = 0; i < fdchangecnt; ++i) |
1582 |
assert (("negative fd in fdchanges", fdchanges [i] >= 0)); |
1583 |
|
1584 |
assert (anfdmax >= 0); |
1585 |
for (i = 0; i < anfdmax; ++i) |
1586 |
for (w = anfds [i].head; w; w = w->next) |
1587 |
{ |
1588 |
verify_watcher (EV_A_ (W)w); |
1589 |
assert (("inactive fd watcher on anfd list", ev_active (w) == 1)); |
1590 |
assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); |
1591 |
} |
1592 |
|
1593 |
assert (timermax >= timercnt); |
1594 |
verify_heap (EV_A_ timers, timercnt); |
1595 |
|
1596 |
#if EV_PERIODIC_ENABLE |
1597 |
assert (periodicmax >= periodiccnt); |
1598 |
verify_heap (EV_A_ periodics, periodiccnt); |
1599 |
#endif |
1600 |
|
1601 |
for (i = NUMPRI; i--; ) |
1602 |
{ |
1603 |
assert (pendingmax [i] >= pendingcnt [i]); |
1604 |
#if EV_IDLE_ENABLE |
1605 |
assert (idleall >= 0); |
1606 |
assert (idlemax [i] >= idlecnt [i]); |
1607 |
array_verify (EV_A_ (W *)idles [i], idlecnt [i]); |
1608 |
#endif |
1609 |
} |
1610 |
|
1611 |
#if EV_FORK_ENABLE |
1612 |
assert (forkmax >= forkcnt); |
1613 |
array_verify (EV_A_ (W *)forks, forkcnt); |
1614 |
#endif |
1615 |
|
1616 |
#if EV_ASYNC_ENABLE |
1617 |
assert (asyncmax >= asynccnt); |
1618 |
array_verify (EV_A_ (W *)asyncs, asynccnt); |
1619 |
#endif |
1620 |
|
1621 |
assert (preparemax >= preparecnt); |
1622 |
array_verify (EV_A_ (W *)prepares, preparecnt); |
1623 |
|
1624 |
assert (checkmax >= checkcnt); |
1625 |
array_verify (EV_A_ (W *)checks, checkcnt); |
1626 |
|
1627 |
# if 0 |
1628 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
1629 |
for (signum = signalmax; signum--; ) if (signals [signum].gotsig) |
1630 |
# endif |
1631 |
#endif |
1632 |
} |
1633 |
|
1634 |
#endif /* multiplicity */ |
1635 |
|
1636 |
#if EV_MULTIPLICITY |
1637 |
struct ev_loop * |
1638 |
ev_default_loop_init (unsigned int flags) |
1639 |
#else |
1640 |
int |
1641 |
ev_default_loop (unsigned int flags) |
1642 |
#endif |
1643 |
{ |
1644 |
if (!ev_default_loop_ptr) |
1645 |
{ |
1646 |
#if EV_MULTIPLICITY |
1647 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
1648 |
#else |
1649 |
ev_default_loop_ptr = 1; |
1650 |
#endif |
1651 |
|
1652 |
loop_init (EV_A_ flags); |
1653 |
|
1654 |
if (ev_backend (EV_A)) |
1655 |
{ |
1656 |
#ifndef _WIN32 |
1657 |
ev_signal_init (&childev, childcb, SIGCHLD); |
1658 |
ev_set_priority (&childev, EV_MAXPRI); |
1659 |
ev_signal_start (EV_A_ &childev); |
1660 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
1661 |
#endif |
1662 |
} |
1663 |
else |
1664 |
ev_default_loop_ptr = 0; |
1665 |
} |
1666 |
|
1667 |
return ev_default_loop_ptr; |
1668 |
} |
1669 |
|
1670 |
void |
1671 |
ev_default_destroy (void) |
1672 |
{ |
1673 |
#if EV_MULTIPLICITY |
1674 |
struct ev_loop *loop = ev_default_loop_ptr; |
1675 |
#endif |
1676 |
|
1677 |
ev_default_loop_ptr = 0; |
1678 |
|
1679 |
#ifndef _WIN32 |
1680 |
ev_ref (EV_A); /* child watcher */ |
1681 |
ev_signal_stop (EV_A_ &childev); |
1682 |
#endif |
1683 |
|
1684 |
loop_destroy (EV_A); |
1685 |
} |
1686 |
|
1687 |
void |
1688 |
ev_default_fork (void) |
1689 |
{ |
1690 |
#if EV_MULTIPLICITY |
1691 |
struct ev_loop *loop = ev_default_loop_ptr; |
1692 |
#endif |
1693 |
|
1694 |
postfork = 1; /* must be in line with ev_loop_fork */ |
1695 |
} |
1696 |
|
1697 |
/*****************************************************************************/ |
1698 |
|
1699 |
void |
1700 |
ev_invoke (EV_P_ void *w, int revents) |
1701 |
{ |
1702 |
EV_CB_INVOKE ((W)w, revents); |
1703 |
} |
1704 |
|
1705 |
void inline_speed |
1706 |
call_pending (EV_P) |
1707 |
{ |
1708 |
int pri; |
1709 |
|
1710 |
for (pri = NUMPRI; pri--; ) |
1711 |
while (pendingcnt [pri]) |
1712 |
{ |
1713 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1714 |
|
1715 |
if (expect_true (p->w)) |
1716 |
{ |
1717 |
/*assert (("non-pending watcher on pending list", p->w->pending));*/ |
1718 |
|
1719 |
p->w->pending = 0; |
1720 |
EV_CB_INVOKE (p->w, p->events); |
1721 |
EV_FREQUENT_CHECK; |
1722 |
} |
1723 |
} |
1724 |
} |
1725 |
|
1726 |
#if EV_IDLE_ENABLE |
1727 |
void inline_size |
1728 |
idle_reify (EV_P) |
1729 |
{ |
1730 |
if (expect_false (idleall)) |
1731 |
{ |
1732 |
int pri; |
1733 |
|
1734 |
for (pri = NUMPRI; pri--; ) |
1735 |
{ |
1736 |
if (pendingcnt [pri]) |
1737 |
break; |
1738 |
|
1739 |
if (idlecnt [pri]) |
1740 |
{ |
1741 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
1742 |
break; |
1743 |
} |
1744 |
} |
1745 |
} |
1746 |
} |
1747 |
#endif |
1748 |
|
1749 |
void inline_size |
1750 |
timers_reify (EV_P) |
1751 |
{ |
1752 |
EV_FREQUENT_CHECK; |
1753 |
|
1754 |
while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) |
1755 |
{ |
1756 |
ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); |
1757 |
|
1758 |
/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ |
1759 |
|
1760 |
/* first reschedule or stop timer */ |
1761 |
if (w->repeat) |
1762 |
{ |
1763 |
ev_at (w) += w->repeat; |
1764 |
if (ev_at (w) < mn_now) |
1765 |
ev_at (w) = mn_now; |
1766 |
|
1767 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1768 |
|
1769 |
ANHE_at_cache (timers [HEAP0]); |
1770 |
downheap (timers, timercnt, HEAP0); |
1771 |
} |
1772 |
else |
1773 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1774 |
|
1775 |
EV_FREQUENT_CHECK; |
1776 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
1777 |
} |
1778 |
} |
1779 |
|
1780 |
#if EV_PERIODIC_ENABLE |
1781 |
void inline_size |
1782 |
periodics_reify (EV_P) |
1783 |
{ |
1784 |
EV_FREQUENT_CHECK; |
1785 |
|
1786 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) |
1787 |
{ |
1788 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); |
1789 |
|
1790 |
/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ |
1791 |
|
1792 |
/* first reschedule or stop timer */ |
1793 |
if (w->reschedule_cb) |
1794 |
{ |
1795 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
1796 |
|
1797 |
assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); |
1798 |
|
1799 |
ANHE_at_cache (periodics [HEAP0]); |
1800 |
downheap (periodics, periodiccnt, HEAP0); |
1801 |
} |
1802 |
else if (w->interval) |
1803 |
{ |
1804 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1805 |
/* if next trigger time is not sufficiently in the future, put it there */ |
1806 |
/* this might happen because of floating point inexactness */ |
1807 |
if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
1808 |
{ |
1809 |
ev_at (w) += w->interval; |
1810 |
|
1811 |
/* if interval is unreasonably low we might still have a time in the past */ |
1812 |
/* so correct this. this will make the periodic very inexact, but the user */ |
1813 |
/* has effectively asked to get triggered more often than possible */ |
1814 |
if (ev_at (w) < ev_rt_now) |
1815 |
ev_at (w) = ev_rt_now; |
1816 |
} |
1817 |
|
1818 |
ANHE_at_cache (periodics [HEAP0]); |
1819 |
downheap (periodics, periodiccnt, HEAP0); |
1820 |
} |
1821 |
else |
1822 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1823 |
|
1824 |
EV_FREQUENT_CHECK; |
1825 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
1826 |
} |
1827 |
} |
1828 |
|
1829 |
static void noinline |
1830 |
periodics_reschedule (EV_P) |
1831 |
{ |
1832 |
int i; |
1833 |
|
1834 |
/* adjust periodics after time jump */ |
1835 |
for (i = HEAP0; i < periodiccnt + HEAP0; ++i) |
1836 |
{ |
1837 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
1838 |
|
1839 |
if (w->reschedule_cb) |
1840 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
1841 |
else if (w->interval) |
1842 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1843 |
|
1844 |
ANHE_at_cache (periodics [i]); |
1845 |
} |
1846 |
|
1847 |
reheap (periodics, periodiccnt); |
1848 |
} |
1849 |
#endif |
1850 |
|
1851 |
void inline_speed |
1852 |
time_update (EV_P_ ev_tstamp max_block) |
1853 |
{ |
1854 |
int i; |
1855 |
|
1856 |
#if EV_USE_MONOTONIC |
1857 |
if (expect_true (have_monotonic)) |
1858 |
{ |
1859 |
ev_tstamp odiff = rtmn_diff; |
1860 |
|
1861 |
mn_now = get_clock (); |
1862 |
|
1863 |
/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
1864 |
/* interpolate in the meantime */ |
1865 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
1866 |
{ |
1867 |
ev_rt_now = rtmn_diff + mn_now; |
1868 |
return; |
1869 |
} |
1870 |
|
1871 |
now_floor = mn_now; |
1872 |
ev_rt_now = ev_time (); |
1873 |
|
1874 |
/* loop a few times, before making important decisions. |
1875 |
* on the choice of "4": one iteration isn't enough, |
1876 |
* in case we get preempted during the calls to |
1877 |
* ev_time and get_clock. a second call is almost guaranteed |
1878 |
* to succeed in that case, though. and looping a few more times |
1879 |
* doesn't hurt either as we only do this on time-jumps or |
1880 |
* in the unlikely event of having been preempted here. |
1881 |
*/ |
1882 |
for (i = 4; --i; ) |
1883 |
{ |
1884 |
rtmn_diff = ev_rt_now - mn_now; |
1885 |
|
1886 |
if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) |
1887 |
return; /* all is well */ |
1888 |
|
1889 |
ev_rt_now = ev_time (); |
1890 |
mn_now = get_clock (); |
1891 |
now_floor = mn_now; |
1892 |
} |
1893 |
|
1894 |
# if EV_PERIODIC_ENABLE |
1895 |
periodics_reschedule (EV_A); |
1896 |
# endif |
1897 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
1898 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
1899 |
} |
1900 |
else |
1901 |
#endif |
1902 |
{ |
1903 |
ev_rt_now = ev_time (); |
1904 |
|
1905 |
if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
1906 |
{ |
1907 |
#if EV_PERIODIC_ENABLE |
1908 |
periodics_reschedule (EV_A); |
1909 |
#endif |
1910 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
1911 |
for (i = 0; i < timercnt; ++i) |
1912 |
{ |
1913 |
ANHE *he = timers + i + HEAP0; |
1914 |
ANHE_w (*he)->at += ev_rt_now - mn_now; |
1915 |
ANHE_at_cache (*he); |
1916 |
} |
1917 |
} |
1918 |
|
1919 |
mn_now = ev_rt_now; |
1920 |
} |
1921 |
} |
1922 |
|
1923 |
void |
1924 |
ev_ref (EV_P) |
1925 |
{ |
1926 |
++activecnt; |
1927 |
} |
1928 |
|
1929 |
void |
1930 |
ev_unref (EV_P) |
1931 |
{ |
1932 |
--activecnt; |
1933 |
} |
1934 |
|
1935 |
void |
1936 |
ev_now_update (EV_P) |
1937 |
{ |
1938 |
time_update (EV_A_ 1e100); |
1939 |
} |
1940 |
|
1941 |
static int loop_done; |
1942 |
|
1943 |
void |
1944 |
ev_loop (EV_P_ int flags) |
1945 |
{ |
1946 |
loop_done = EVUNLOOP_CANCEL; |
1947 |
|
1948 |
call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ |
1949 |
|
1950 |
do |
1951 |
{ |
1952 |
#if EV_VERIFY >= 2 |
1953 |
ev_loop_verify (EV_A); |
1954 |
#endif |
1955 |
|
1956 |
#ifndef _WIN32 |
1957 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
1958 |
if (expect_false (getpid () != curpid)) |
1959 |
{ |
1960 |
curpid = getpid (); |
1961 |
postfork = 1; |
1962 |
} |
1963 |
#endif |
1964 |
|
1965 |
#if EV_FORK_ENABLE |
1966 |
/* we might have forked, so queue fork handlers */ |
1967 |
if (expect_false (postfork)) |
1968 |
if (forkcnt) |
1969 |
{ |
1970 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
1971 |
call_pending (EV_A); |
1972 |
} |
1973 |
#endif |
1974 |
|
1975 |
/* queue prepare watchers (and execute them) */ |
1976 |
if (expect_false (preparecnt)) |
1977 |
{ |
1978 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
1979 |
call_pending (EV_A); |
1980 |
} |
1981 |
|
1982 |
if (expect_false (!activecnt)) |
1983 |
break; |
1984 |
|
1985 |
/* we might have forked, so reify kernel state if necessary */ |
1986 |
if (expect_false (postfork)) |
1987 |
loop_fork (EV_A); |
1988 |
|
1989 |
/* update fd-related kernel structures */ |
1990 |
fd_reify (EV_A); |
1991 |
|
1992 |
/* calculate blocking time */ |
1993 |
{ |
1994 |
ev_tstamp waittime = 0.; |
1995 |
ev_tstamp sleeptime = 0.; |
1996 |
|
1997 |
if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) |
1998 |
{ |
1999 |
/* update time to cancel out callback processing overhead */ |
2000 |
time_update (EV_A_ 1e100); |
2001 |
|
2002 |
waittime = MAX_BLOCKTIME; |
2003 |
|
2004 |
if (timercnt) |
2005 |
{ |
2006 |
ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; |
2007 |
if (waittime > to) waittime = to; |
2008 |
} |
2009 |
|
2010 |
#if EV_PERIODIC_ENABLE |
2011 |
if (periodiccnt) |
2012 |
{ |
2013 |
ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; |
2014 |
if (waittime > to) waittime = to; |
2015 |
} |
2016 |
#endif |
2017 |
|
2018 |
if (expect_false (waittime < timeout_blocktime)) |
2019 |
waittime = timeout_blocktime; |
2020 |
|
2021 |
sleeptime = waittime - backend_fudge; |
2022 |
|
2023 |
if (expect_true (sleeptime > io_blocktime)) |
2024 |
sleeptime = io_blocktime; |
2025 |
|
2026 |
if (sleeptime) |
2027 |
{ |
2028 |
ev_sleep (sleeptime); |
2029 |
waittime -= sleeptime; |
2030 |
} |
2031 |
} |
2032 |
|
2033 |
++loop_count; |
2034 |
backend_poll (EV_A_ waittime); |
2035 |
|
2036 |
/* update ev_rt_now, do magic */ |
2037 |
time_update (EV_A_ waittime + sleeptime); |
2038 |
} |
2039 |
|
2040 |
/* queue pending timers and reschedule them */ |
2041 |
timers_reify (EV_A); /* relative timers called last */ |
2042 |
#if EV_PERIODIC_ENABLE |
2043 |
periodics_reify (EV_A); /* absolute timers called first */ |
2044 |
#endif |
2045 |
|
2046 |
#if EV_IDLE_ENABLE |
2047 |
/* queue idle watchers unless other events are pending */ |
2048 |
idle_reify (EV_A); |
2049 |
#endif |
2050 |
|
2051 |
/* queue check watchers, to be executed first */ |
2052 |
if (expect_false (checkcnt)) |
2053 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
2054 |
|
2055 |
call_pending (EV_A); |
2056 |
} |
2057 |
while (expect_true ( |
2058 |
activecnt |
2059 |
&& !loop_done |
2060 |
&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) |
2061 |
)); |
2062 |
|
2063 |
if (loop_done == EVUNLOOP_ONE) |
2064 |
loop_done = EVUNLOOP_CANCEL; |
2065 |
} |
2066 |
|
2067 |
void |
2068 |
ev_unloop (EV_P_ int how) |
2069 |
{ |
2070 |
loop_done = how; |
2071 |
} |
2072 |
|
2073 |
/*****************************************************************************/ |
2074 |
|
2075 |
void inline_size |
2076 |
wlist_add (WL *head, WL elem) |
2077 |
{ |
2078 |
elem->next = *head; |
2079 |
*head = elem; |
2080 |
} |
2081 |
|
2082 |
void inline_size |
2083 |
wlist_del (WL *head, WL elem) |
2084 |
{ |
2085 |
while (*head) |
2086 |
{ |
2087 |
if (*head == elem) |
2088 |
{ |
2089 |
*head = elem->next; |
2090 |
return; |
2091 |
} |
2092 |
|
2093 |
head = &(*head)->next; |
2094 |
} |
2095 |
} |
2096 |
|
2097 |
void inline_speed |
2098 |
clear_pending (EV_P_ W w) |
2099 |
{ |
2100 |
if (w->pending) |
2101 |
{ |
2102 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
2103 |
w->pending = 0; |
2104 |
} |
2105 |
} |
2106 |
|
2107 |
int |
2108 |
ev_clear_pending (EV_P_ void *w) |
2109 |
{ |
2110 |
W w_ = (W)w; |
2111 |
int pending = w_->pending; |
2112 |
|
2113 |
if (expect_true (pending)) |
2114 |
{ |
2115 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
2116 |
w_->pending = 0; |
2117 |
p->w = 0; |
2118 |
return p->events; |
2119 |
} |
2120 |
else |
2121 |
return 0; |
2122 |
} |
2123 |
|
2124 |
void inline_size |
2125 |
pri_adjust (EV_P_ W w) |
2126 |
{ |
2127 |
int pri = w->priority; |
2128 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
2129 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
2130 |
w->priority = pri; |
2131 |
} |
2132 |
|
2133 |
void inline_speed |
2134 |
ev_start (EV_P_ W w, int active) |
2135 |
{ |
2136 |
pri_adjust (EV_A_ w); |
2137 |
w->active = active; |
2138 |
ev_ref (EV_A); |
2139 |
} |
2140 |
|
2141 |
void inline_size |
2142 |
ev_stop (EV_P_ W w) |
2143 |
{ |
2144 |
ev_unref (EV_A); |
2145 |
w->active = 0; |
2146 |
} |
2147 |
|
2148 |
/*****************************************************************************/ |
2149 |
|
2150 |
void noinline |
2151 |
ev_io_start (EV_P_ ev_io *w) |
2152 |
{ |
2153 |
int fd = w->fd; |
2154 |
|
2155 |
if (expect_false (ev_is_active (w))) |
2156 |
return; |
2157 |
|
2158 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
2159 |
assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE)))); |
2160 |
|
2161 |
EV_FREQUENT_CHECK; |
2162 |
|
2163 |
ev_start (EV_A_ (W)w, 1); |
2164 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2165 |
wlist_add (&anfds[fd].head, (WL)w); |
2166 |
|
2167 |
fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); |
2168 |
w->events &= ~EV_IOFDSET; |
2169 |
|
2170 |
EV_FREQUENT_CHECK; |
2171 |
} |
2172 |
|
2173 |
void noinline |
2174 |
ev_io_stop (EV_P_ ev_io *w) |
2175 |
{ |
2176 |
clear_pending (EV_A_ (W)w); |
2177 |
if (expect_false (!ev_is_active (w))) |
2178 |
return; |
2179 |
|
2180 |
assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
2181 |
|
2182 |
EV_FREQUENT_CHECK; |
2183 |
|
2184 |
wlist_del (&anfds[w->fd].head, (WL)w); |
2185 |
ev_stop (EV_A_ (W)w); |
2186 |
|
2187 |
fd_change (EV_A_ w->fd, 1); |
2188 |
|
2189 |
EV_FREQUENT_CHECK; |
2190 |
} |
2191 |
|
2192 |
void noinline |
2193 |
ev_timer_start (EV_P_ ev_timer *w) |
2194 |
{ |
2195 |
if (expect_false (ev_is_active (w))) |
2196 |
return; |
2197 |
|
2198 |
ev_at (w) += mn_now; |
2199 |
|
2200 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
2201 |
|
2202 |
EV_FREQUENT_CHECK; |
2203 |
|
2204 |
++timercnt; |
2205 |
ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); |
2206 |
array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); |
2207 |
ANHE_w (timers [ev_active (w)]) = (WT)w; |
2208 |
ANHE_at_cache (timers [ev_active (w)]); |
2209 |
upheap (timers, ev_active (w)); |
2210 |
|
2211 |
EV_FREQUENT_CHECK; |
2212 |
|
2213 |
/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ |
2214 |
} |
2215 |
|
2216 |
void noinline |
2217 |
ev_timer_stop (EV_P_ ev_timer *w) |
2218 |
{ |
2219 |
clear_pending (EV_A_ (W)w); |
2220 |
if (expect_false (!ev_is_active (w))) |
2221 |
return; |
2222 |
|
2223 |
EV_FREQUENT_CHECK; |
2224 |
|
2225 |
{ |
2226 |
int active = ev_active (w); |
2227 |
|
2228 |
assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); |
2229 |
|
2230 |
--timercnt; |
2231 |
|
2232 |
if (expect_true (active < timercnt + HEAP0)) |
2233 |
{ |
2234 |
timers [active] = timers [timercnt + HEAP0]; |
2235 |
adjustheap (timers, timercnt, active); |
2236 |
} |
2237 |
} |
2238 |
|
2239 |
EV_FREQUENT_CHECK; |
2240 |
|
2241 |
ev_at (w) -= mn_now; |
2242 |
|
2243 |
ev_stop (EV_A_ (W)w); |
2244 |
} |
2245 |
|
2246 |
void noinline |
2247 |
ev_timer_again (EV_P_ ev_timer *w) |
2248 |
{ |
2249 |
EV_FREQUENT_CHECK; |
2250 |
|
2251 |
if (ev_is_active (w)) |
2252 |
{ |
2253 |
if (w->repeat) |
2254 |
{ |
2255 |
ev_at (w) = mn_now + w->repeat; |
2256 |
ANHE_at_cache (timers [ev_active (w)]); |
2257 |
adjustheap (timers, timercnt, ev_active (w)); |
2258 |
} |
2259 |
else |
2260 |
ev_timer_stop (EV_A_ w); |
2261 |
} |
2262 |
else if (w->repeat) |
2263 |
{ |
2264 |
ev_at (w) = w->repeat; |
2265 |
ev_timer_start (EV_A_ w); |
2266 |
} |
2267 |
|
2268 |
EV_FREQUENT_CHECK; |
2269 |
} |
2270 |
|
2271 |
#if EV_PERIODIC_ENABLE |
2272 |
void noinline |
2273 |
ev_periodic_start (EV_P_ ev_periodic *w) |
2274 |
{ |
2275 |
if (expect_false (ev_is_active (w))) |
2276 |
return; |
2277 |
|
2278 |
if (w->reschedule_cb) |
2279 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2280 |
else if (w->interval) |
2281 |
{ |
2282 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2283 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
2284 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2285 |
} |
2286 |
else |
2287 |
ev_at (w) = w->offset; |
2288 |
|
2289 |
EV_FREQUENT_CHECK; |
2290 |
|
2291 |
++periodiccnt; |
2292 |
ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); |
2293 |
array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); |
2294 |
ANHE_w (periodics [ev_active (w)]) = (WT)w; |
2295 |
ANHE_at_cache (periodics [ev_active (w)]); |
2296 |
upheap (periodics, ev_active (w)); |
2297 |
|
2298 |
EV_FREQUENT_CHECK; |
2299 |
|
2300 |
/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ |
2301 |
} |
2302 |
|
2303 |
void noinline |
2304 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
2305 |
{ |
2306 |
clear_pending (EV_A_ (W)w); |
2307 |
if (expect_false (!ev_is_active (w))) |
2308 |
return; |
2309 |
|
2310 |
EV_FREQUENT_CHECK; |
2311 |
|
2312 |
{ |
2313 |
int active = ev_active (w); |
2314 |
|
2315 |
assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); |
2316 |
|
2317 |
--periodiccnt; |
2318 |
|
2319 |
if (expect_true (active < periodiccnt + HEAP0)) |
2320 |
{ |
2321 |
periodics [active] = periodics [periodiccnt + HEAP0]; |
2322 |
adjustheap (periodics, periodiccnt, active); |
2323 |
} |
2324 |
} |
2325 |
|
2326 |
EV_FREQUENT_CHECK; |
2327 |
|
2328 |
ev_stop (EV_A_ (W)w); |
2329 |
} |
2330 |
|
2331 |
void noinline |
2332 |
ev_periodic_again (EV_P_ ev_periodic *w) |
2333 |
{ |
2334 |
/* TODO: use adjustheap and recalculation */ |
2335 |
ev_periodic_stop (EV_A_ w); |
2336 |
ev_periodic_start (EV_A_ w); |
2337 |
} |
2338 |
#endif |
2339 |
|
2340 |
#ifndef SA_RESTART |
2341 |
# define SA_RESTART 0 |
2342 |
#endif |
2343 |
|
2344 |
void noinline |
2345 |
ev_signal_start (EV_P_ ev_signal *w) |
2346 |
{ |
2347 |
#if EV_MULTIPLICITY |
2348 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
2349 |
#endif |
2350 |
if (expect_false (ev_is_active (w))) |
2351 |
return; |
2352 |
|
2353 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
2354 |
|
2355 |
evpipe_init (EV_A); |
2356 |
|
2357 |
EV_FREQUENT_CHECK; |
2358 |
|
2359 |
{ |
2360 |
#ifndef _WIN32 |
2361 |
sigset_t full, prev; |
2362 |
sigfillset (&full); |
2363 |
sigprocmask (SIG_SETMASK, &full, &prev); |
2364 |
#endif |
2365 |
|
2366 |
array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); |
2367 |
|
2368 |
#ifndef _WIN32 |
2369 |
sigprocmask (SIG_SETMASK, &prev, 0); |
2370 |
#endif |
2371 |
} |
2372 |
|
2373 |
ev_start (EV_A_ (W)w, 1); |
2374 |
wlist_add (&signals [w->signum - 1].head, (WL)w); |
2375 |
|
2376 |
if (!((WL)w)->next) |
2377 |
{ |
2378 |
#if _WIN32 |
2379 |
signal (w->signum, ev_sighandler); |
2380 |
#else |
2381 |
struct sigaction sa; |
2382 |
sa.sa_handler = ev_sighandler; |
2383 |
sigfillset (&sa.sa_mask); |
2384 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2385 |
sigaction (w->signum, &sa, 0); |
2386 |
#endif |
2387 |
} |
2388 |
|
2389 |
EV_FREQUENT_CHECK; |
2390 |
} |
2391 |
|
2392 |
void noinline |
2393 |
ev_signal_stop (EV_P_ ev_signal *w) |
2394 |
{ |
2395 |
clear_pending (EV_A_ (W)w); |
2396 |
if (expect_false (!ev_is_active (w))) |
2397 |
return; |
2398 |
|
2399 |
EV_FREQUENT_CHECK; |
2400 |
|
2401 |
wlist_del (&signals [w->signum - 1].head, (WL)w); |
2402 |
ev_stop (EV_A_ (W)w); |
2403 |
|
2404 |
if (!signals [w->signum - 1].head) |
2405 |
signal (w->signum, SIG_DFL); |
2406 |
|
2407 |
EV_FREQUENT_CHECK; |
2408 |
} |
2409 |
|
2410 |
void |
2411 |
ev_child_start (EV_P_ ev_child *w) |
2412 |
{ |
2413 |
#if EV_MULTIPLICITY |
2414 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
2415 |
#endif |
2416 |
if (expect_false (ev_is_active (w))) |
2417 |
return; |
2418 |
|
2419 |
EV_FREQUENT_CHECK; |
2420 |
|
2421 |
ev_start (EV_A_ (W)w, 1); |
2422 |
wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
2423 |
|
2424 |
EV_FREQUENT_CHECK; |
2425 |
} |
2426 |
|
2427 |
void |
2428 |
ev_child_stop (EV_P_ ev_child *w) |
2429 |
{ |
2430 |
clear_pending (EV_A_ (W)w); |
2431 |
if (expect_false (!ev_is_active (w))) |
2432 |
return; |
2433 |
|
2434 |
EV_FREQUENT_CHECK; |
2435 |
|
2436 |
wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
2437 |
ev_stop (EV_A_ (W)w); |
2438 |
|
2439 |
EV_FREQUENT_CHECK; |
2440 |
} |
2441 |
|
2442 |
#if EV_STAT_ENABLE |
2443 |
|
2444 |
# ifdef _WIN32 |
2445 |
# undef lstat |
2446 |
# define lstat(a,b) _stati64 (a,b) |
2447 |
# endif |
2448 |
|
2449 |
#define DEF_STAT_INTERVAL 5.0074891 |
2450 |
#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ |
2451 |
#define MIN_STAT_INTERVAL 0.1074891 |
2452 |
|
2453 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2454 |
|
2455 |
#if EV_USE_INOTIFY |
2456 |
# define EV_INOTIFY_BUFSIZE 8192 |
2457 |
|
2458 |
static void noinline |
2459 |
infy_add (EV_P_ ev_stat *w) |
2460 |
{ |
2461 |
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); |
2462 |
|
2463 |
if (w->wd < 0) |
2464 |
{ |
2465 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2466 |
ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
2467 |
|
2468 |
/* monitor some parent directory for speedup hints */ |
2469 |
/* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2470 |
/* but an efficiency issue only */ |
2471 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2472 |
{ |
2473 |
char path [4096]; |
2474 |
strcpy (path, w->path); |
2475 |
|
2476 |
do |
2477 |
{ |
2478 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
2479 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
2480 |
|
2481 |
char *pend = strrchr (path, '/'); |
2482 |
|
2483 |
if (!pend || pend == path) |
2484 |
break; |
2485 |
|
2486 |
*pend = 0; |
2487 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
2488 |
} |
2489 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2490 |
} |
2491 |
} |
2492 |
|
2493 |
if (w->wd >= 0) |
2494 |
{ |
2495 |
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2496 |
|
2497 |
/* now local changes will be tracked by inotify, but remote changes won't */ |
2498 |
/* unless the filesystem it known to be local, we therefore still poll */ |
2499 |
/* also do poll on <2.6.25, but with normal frequency */ |
2500 |
struct statfs sfs; |
2501 |
|
2502 |
if (fs_2625 && !statfs (w->path, &sfs)) |
2503 |
if (sfs.f_type == 0x1373 /* devfs */ |
2504 |
|| sfs.f_type == 0xEF53 /* ext2/3 */ |
2505 |
|| sfs.f_type == 0x3153464a /* jfs */ |
2506 |
|| sfs.f_type == 0x52654973 /* reiser3 */ |
2507 |
|| sfs.f_type == 0x01021994 /* tempfs */ |
2508 |
|| sfs.f_type == 0x58465342 /* xfs */) |
2509 |
return; |
2510 |
|
2511 |
w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL; |
2512 |
ev_timer_again (EV_A_ &w->timer); |
2513 |
} |
2514 |
} |
2515 |
|
2516 |
static void noinline |
2517 |
infy_del (EV_P_ ev_stat *w) |
2518 |
{ |
2519 |
int slot; |
2520 |
int wd = w->wd; |
2521 |
|
2522 |
if (wd < 0) |
2523 |
return; |
2524 |
|
2525 |
w->wd = -2; |
2526 |
slot = wd & (EV_INOTIFY_HASHSIZE - 1); |
2527 |
wlist_del (&fs_hash [slot].head, (WL)w); |
2528 |
|
2529 |
/* remove this watcher, if others are watching it, they will rearm */ |
2530 |
inotify_rm_watch (fs_fd, wd); |
2531 |
} |
2532 |
|
2533 |
static void noinline |
2534 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
2535 |
{ |
2536 |
if (slot < 0) |
2537 |
/* overflow, need to check for all hash slots */ |
2538 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2539 |
infy_wd (EV_A_ slot, wd, ev); |
2540 |
else |
2541 |
{ |
2542 |
WL w_; |
2543 |
|
2544 |
for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) |
2545 |
{ |
2546 |
ev_stat *w = (ev_stat *)w_; |
2547 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
2548 |
|
2549 |
if (w->wd == wd || wd == -1) |
2550 |
{ |
2551 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
2552 |
{ |
2553 |
wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2554 |
w->wd = -1; |
2555 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2556 |
} |
2557 |
|
2558 |
stat_timer_cb (EV_A_ &w->timer, 0); |
2559 |
} |
2560 |
} |
2561 |
} |
2562 |
} |
2563 |
|
2564 |
static void |
2565 |
infy_cb (EV_P_ ev_io *w, int revents) |
2566 |
{ |
2567 |
char buf [EV_INOTIFY_BUFSIZE]; |
2568 |
struct inotify_event *ev = (struct inotify_event *)buf; |
2569 |
int ofs; |
2570 |
int len = read (fs_fd, buf, sizeof (buf)); |
2571 |
|
2572 |
for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
2573 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
2574 |
} |
2575 |
|
2576 |
void inline_size |
2577 |
check_2625 (EV_P) |
2578 |
{ |
2579 |
/* kernels < 2.6.25 are borked |
2580 |
* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
2581 |
*/ |
2582 |
struct utsname buf; |
2583 |
int major, minor, micro; |
2584 |
|
2585 |
if (uname (&buf)) |
2586 |
return; |
2587 |
|
2588 |
if (sscanf (buf.release, "%d.%d.%d", &major, &minor, µ) != 3) |
2589 |
return; |
2590 |
|
2591 |
if (major < 2 |
2592 |
|| (major == 2 && minor < 6) |
2593 |
|| (major == 2 && minor == 6 && micro < 25)) |
2594 |
return; |
2595 |
|
2596 |
fs_2625 = 1; |
2597 |
} |
2598 |
|
2599 |
void inline_size |
2600 |
infy_init (EV_P) |
2601 |
{ |
2602 |
if (fs_fd != -2) |
2603 |
return; |
2604 |
|
2605 |
fs_fd = -1; |
2606 |
|
2607 |
check_2625 (EV_A); |
2608 |
|
2609 |
fs_fd = inotify_init (); |
2610 |
|
2611 |
if (fs_fd >= 0) |
2612 |
{ |
2613 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2614 |
ev_set_priority (&fs_w, EV_MAXPRI); |
2615 |
ev_io_start (EV_A_ &fs_w); |
2616 |
} |
2617 |
} |
2618 |
|
2619 |
void inline_size |
2620 |
infy_fork (EV_P) |
2621 |
{ |
2622 |
int slot; |
2623 |
|
2624 |
if (fs_fd < 0) |
2625 |
return; |
2626 |
|
2627 |
close (fs_fd); |
2628 |
fs_fd = inotify_init (); |
2629 |
|
2630 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2631 |
{ |
2632 |
WL w_ = fs_hash [slot].head; |
2633 |
fs_hash [slot].head = 0; |
2634 |
|
2635 |
while (w_) |
2636 |
{ |
2637 |
ev_stat *w = (ev_stat *)w_; |
2638 |
w_ = w_->next; /* lets us add this watcher */ |
2639 |
|
2640 |
w->wd = -1; |
2641 |
|
2642 |
if (fs_fd >= 0) |
2643 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2644 |
else |
2645 |
ev_timer_again (EV_A_ &w->timer); |
2646 |
} |
2647 |
} |
2648 |
} |
2649 |
|
2650 |
#endif |
2651 |
|
2652 |
#ifdef _WIN32 |
2653 |
# define EV_LSTAT(p,b) _stati64 (p, b) |
2654 |
#else |
2655 |
# define EV_LSTAT(p,b) lstat (p, b) |
2656 |
#endif |
2657 |
|
2658 |
void |
2659 |
ev_stat_stat (EV_P_ ev_stat *w) |
2660 |
{ |
2661 |
if (lstat (w->path, &w->attr) < 0) |
2662 |
w->attr.st_nlink = 0; |
2663 |
else if (!w->attr.st_nlink) |
2664 |
w->attr.st_nlink = 1; |
2665 |
} |
2666 |
|
2667 |
static void noinline |
2668 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
2669 |
{ |
2670 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
2671 |
|
2672 |
/* we copy this here each the time so that */ |
2673 |
/* prev has the old value when the callback gets invoked */ |
2674 |
w->prev = w->attr; |
2675 |
ev_stat_stat (EV_A_ w); |
2676 |
|
2677 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
2678 |
if ( |
2679 |
w->prev.st_dev != w->attr.st_dev |
2680 |
|| w->prev.st_ino != w->attr.st_ino |
2681 |
|| w->prev.st_mode != w->attr.st_mode |
2682 |
|| w->prev.st_nlink != w->attr.st_nlink |
2683 |
|| w->prev.st_uid != w->attr.st_uid |
2684 |
|| w->prev.st_gid != w->attr.st_gid |
2685 |
|| w->prev.st_rdev != w->attr.st_rdev |
2686 |
|| w->prev.st_size != w->attr.st_size |
2687 |
|| w->prev.st_atime != w->attr.st_atime |
2688 |
|| w->prev.st_mtime != w->attr.st_mtime |
2689 |
|| w->prev.st_ctime != w->attr.st_ctime |
2690 |
) { |
2691 |
#if EV_USE_INOTIFY |
2692 |
if (fs_fd >= 0) |
2693 |
{ |
2694 |
infy_del (EV_A_ w); |
2695 |
infy_add (EV_A_ w); |
2696 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
2697 |
} |
2698 |
#endif |
2699 |
|
2700 |
ev_feed_event (EV_A_ w, EV_STAT); |
2701 |
} |
2702 |
} |
2703 |
|
2704 |
void |
2705 |
ev_stat_start (EV_P_ ev_stat *w) |
2706 |
{ |
2707 |
if (expect_false (ev_is_active (w))) |
2708 |
return; |
2709 |
|
2710 |
ev_stat_stat (EV_A_ w); |
2711 |
|
2712 |
if (w->interval < MIN_STAT_INTERVAL && w->interval) |
2713 |
w->interval = MIN_STAT_INTERVAL; |
2714 |
|
2715 |
ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); |
2716 |
ev_set_priority (&w->timer, ev_priority (w)); |
2717 |
|
2718 |
#if EV_USE_INOTIFY |
2719 |
infy_init (EV_A); |
2720 |
|
2721 |
if (fs_fd >= 0) |
2722 |
infy_add (EV_A_ w); |
2723 |
else |
2724 |
#endif |
2725 |
ev_timer_again (EV_A_ &w->timer); |
2726 |
|
2727 |
ev_start (EV_A_ (W)w, 1); |
2728 |
|
2729 |
EV_FREQUENT_CHECK; |
2730 |
} |
2731 |
|
2732 |
void |
2733 |
ev_stat_stop (EV_P_ ev_stat *w) |
2734 |
{ |
2735 |
clear_pending (EV_A_ (W)w); |
2736 |
if (expect_false (!ev_is_active (w))) |
2737 |
return; |
2738 |
|
2739 |
EV_FREQUENT_CHECK; |
2740 |
|
2741 |
#if EV_USE_INOTIFY |
2742 |
infy_del (EV_A_ w); |
2743 |
#endif |
2744 |
ev_timer_stop (EV_A_ &w->timer); |
2745 |
|
2746 |
ev_stop (EV_A_ (W)w); |
2747 |
|
2748 |
EV_FREQUENT_CHECK; |
2749 |
} |
2750 |
#endif |
2751 |
|
2752 |
#if EV_IDLE_ENABLE |
2753 |
void |
2754 |
ev_idle_start (EV_P_ ev_idle *w) |
2755 |
{ |
2756 |
if (expect_false (ev_is_active (w))) |
2757 |
return; |
2758 |
|
2759 |
pri_adjust (EV_A_ (W)w); |
2760 |
|
2761 |
EV_FREQUENT_CHECK; |
2762 |
|
2763 |
{ |
2764 |
int active = ++idlecnt [ABSPRI (w)]; |
2765 |
|
2766 |
++idleall; |
2767 |
ev_start (EV_A_ (W)w, active); |
2768 |
|
2769 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
2770 |
idles [ABSPRI (w)][active - 1] = w; |
2771 |
} |
2772 |
|
2773 |
EV_FREQUENT_CHECK; |
2774 |
} |
2775 |
|
2776 |
void |
2777 |
ev_idle_stop (EV_P_ ev_idle *w) |
2778 |
{ |
2779 |
clear_pending (EV_A_ (W)w); |
2780 |
if (expect_false (!ev_is_active (w))) |
2781 |
return; |
2782 |
|
2783 |
EV_FREQUENT_CHECK; |
2784 |
|
2785 |
{ |
2786 |
int active = ev_active (w); |
2787 |
|
2788 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
2789 |
ev_active (idles [ABSPRI (w)][active - 1]) = active; |
2790 |
|
2791 |
ev_stop (EV_A_ (W)w); |
2792 |
--idleall; |
2793 |
} |
2794 |
|
2795 |
EV_FREQUENT_CHECK; |
2796 |
} |
2797 |
#endif |
2798 |
|
2799 |
void |
2800 |
ev_prepare_start (EV_P_ ev_prepare *w) |
2801 |
{ |
2802 |
if (expect_false (ev_is_active (w))) |
2803 |
return; |
2804 |
|
2805 |
EV_FREQUENT_CHECK; |
2806 |
|
2807 |
ev_start (EV_A_ (W)w, ++preparecnt); |
2808 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
2809 |
prepares [preparecnt - 1] = w; |
2810 |
|
2811 |
EV_FREQUENT_CHECK; |
2812 |
} |
2813 |
|
2814 |
void |
2815 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
2816 |
{ |
2817 |
clear_pending (EV_A_ (W)w); |
2818 |
if (expect_false (!ev_is_active (w))) |
2819 |
return; |
2820 |
|
2821 |
EV_FREQUENT_CHECK; |
2822 |
|
2823 |
{ |
2824 |
int active = ev_active (w); |
2825 |
|
2826 |
prepares [active - 1] = prepares [--preparecnt]; |
2827 |
ev_active (prepares [active - 1]) = active; |
2828 |
} |
2829 |
|
2830 |
ev_stop (EV_A_ (W)w); |
2831 |
|
2832 |
EV_FREQUENT_CHECK; |
2833 |
} |
2834 |
|
2835 |
void |
2836 |
ev_check_start (EV_P_ ev_check *w) |
2837 |
{ |
2838 |
if (expect_false (ev_is_active (w))) |
2839 |
return; |
2840 |
|
2841 |
EV_FREQUENT_CHECK; |
2842 |
|
2843 |
ev_start (EV_A_ (W)w, ++checkcnt); |
2844 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
2845 |
checks [checkcnt - 1] = w; |
2846 |
|
2847 |
EV_FREQUENT_CHECK; |
2848 |
} |
2849 |
|
2850 |
void |
2851 |
ev_check_stop (EV_P_ ev_check *w) |
2852 |
{ |
2853 |
clear_pending (EV_A_ (W)w); |
2854 |
if (expect_false (!ev_is_active (w))) |
2855 |
return; |
2856 |
|
2857 |
EV_FREQUENT_CHECK; |
2858 |
|
2859 |
{ |
2860 |
int active = ev_active (w); |
2861 |
|
2862 |
checks [active - 1] = checks [--checkcnt]; |
2863 |
ev_active (checks [active - 1]) = active; |
2864 |
} |
2865 |
|
2866 |
ev_stop (EV_A_ (W)w); |
2867 |
|
2868 |
EV_FREQUENT_CHECK; |
2869 |
} |
2870 |
|
2871 |
#if EV_EMBED_ENABLE |
2872 |
void noinline |
2873 |
ev_embed_sweep (EV_P_ ev_embed *w) |
2874 |
{ |
2875 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
2876 |
} |
2877 |
|
2878 |
static void |
2879 |
embed_io_cb (EV_P_ ev_io *io, int revents) |
2880 |
{ |
2881 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
2882 |
|
2883 |
if (ev_cb (w)) |
2884 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
2885 |
else |
2886 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
2887 |
} |
2888 |
|
2889 |
static void |
2890 |
embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
2891 |
{ |
2892 |
ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
2893 |
|
2894 |
{ |
2895 |
struct ev_loop *loop = w->other; |
2896 |
|
2897 |
while (fdchangecnt) |
2898 |
{ |
2899 |
fd_reify (EV_A); |
2900 |
ev_loop (EV_A_ EVLOOP_NONBLOCK); |
2901 |
} |
2902 |
} |
2903 |
} |
2904 |
|
2905 |
static void |
2906 |
embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) |
2907 |
{ |
2908 |
ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); |
2909 |
|
2910 |
{ |
2911 |
struct ev_loop *loop = w->other; |
2912 |
|
2913 |
ev_loop_fork (EV_A); |
2914 |
} |
2915 |
} |
2916 |
|
2917 |
#if 0 |
2918 |
static void |
2919 |
embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
2920 |
{ |
2921 |
ev_idle_stop (EV_A_ idle); |
2922 |
} |
2923 |
#endif |
2924 |
|
2925 |
void |
2926 |
ev_embed_start (EV_P_ ev_embed *w) |
2927 |
{ |
2928 |
if (expect_false (ev_is_active (w))) |
2929 |
return; |
2930 |
|
2931 |
{ |
2932 |
struct ev_loop *loop = w->other; |
2933 |
assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
2934 |
ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
2935 |
} |
2936 |
|
2937 |
EV_FREQUENT_CHECK; |
2938 |
|
2939 |
ev_set_priority (&w->io, ev_priority (w)); |
2940 |
ev_io_start (EV_A_ &w->io); |
2941 |
|
2942 |
ev_prepare_init (&w->prepare, embed_prepare_cb); |
2943 |
ev_set_priority (&w->prepare, EV_MINPRI); |
2944 |
ev_prepare_start (EV_A_ &w->prepare); |
2945 |
|
2946 |
ev_fork_init (&w->fork, embed_fork_cb); |
2947 |
ev_fork_start (EV_A_ &w->fork); |
2948 |
|
2949 |
/*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
2950 |
|
2951 |
ev_start (EV_A_ (W)w, 1); |
2952 |
|
2953 |
EV_FREQUENT_CHECK; |
2954 |
} |
2955 |
|
2956 |
void |
2957 |
ev_embed_stop (EV_P_ ev_embed *w) |
2958 |
{ |
2959 |
clear_pending (EV_A_ (W)w); |
2960 |
if (expect_false (!ev_is_active (w))) |
2961 |
return; |
2962 |
|
2963 |
EV_FREQUENT_CHECK; |
2964 |
|
2965 |
ev_io_stop (EV_A_ &w->io); |
2966 |
ev_prepare_stop (EV_A_ &w->prepare); |
2967 |
ev_fork_stop (EV_A_ &w->fork); |
2968 |
|
2969 |
EV_FREQUENT_CHECK; |
2970 |
} |
2971 |
#endif |
2972 |
|
2973 |
#if EV_FORK_ENABLE |
2974 |
void |
2975 |
ev_fork_start (EV_P_ ev_fork *w) |
2976 |
{ |
2977 |
if (expect_false (ev_is_active (w))) |
2978 |
return; |
2979 |
|
2980 |
EV_FREQUENT_CHECK; |
2981 |
|
2982 |
ev_start (EV_A_ (W)w, ++forkcnt); |
2983 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
2984 |
forks [forkcnt - 1] = w; |
2985 |
|
2986 |
EV_FREQUENT_CHECK; |
2987 |
} |
2988 |
|
2989 |
void |
2990 |
ev_fork_stop (EV_P_ ev_fork *w) |
2991 |
{ |
2992 |
clear_pending (EV_A_ (W)w); |
2993 |
if (expect_false (!ev_is_active (w))) |
2994 |
return; |
2995 |
|
2996 |
EV_FREQUENT_CHECK; |
2997 |
|
2998 |
{ |
2999 |
int active = ev_active (w); |
3000 |
|
3001 |
forks [active - 1] = forks [--forkcnt]; |
3002 |
ev_active (forks [active - 1]) = active; |
3003 |
} |
3004 |
|
3005 |
ev_stop (EV_A_ (W)w); |
3006 |
|
3007 |
EV_FREQUENT_CHECK; |
3008 |
} |
3009 |
#endif |
3010 |
|
3011 |
#if EV_ASYNC_ENABLE |
3012 |
void |
3013 |
ev_async_start (EV_P_ ev_async *w) |
3014 |
{ |
3015 |
if (expect_false (ev_is_active (w))) |
3016 |
return; |
3017 |
|
3018 |
evpipe_init (EV_A); |
3019 |
|
3020 |
EV_FREQUENT_CHECK; |
3021 |
|
3022 |
ev_start (EV_A_ (W)w, ++asynccnt); |
3023 |
array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
3024 |
asyncs [asynccnt - 1] = w; |
3025 |
|
3026 |
EV_FREQUENT_CHECK; |
3027 |
} |
3028 |
|
3029 |
void |
3030 |
ev_async_stop (EV_P_ ev_async *w) |
3031 |
{ |
3032 |
clear_pending (EV_A_ (W)w); |
3033 |
if (expect_false (!ev_is_active (w))) |
3034 |
return; |
3035 |
|
3036 |
EV_FREQUENT_CHECK; |
3037 |
|
3038 |
{ |
3039 |
int active = ev_active (w); |
3040 |
|
3041 |
asyncs [active - 1] = asyncs [--asynccnt]; |
3042 |
ev_active (asyncs [active - 1]) = active; |
3043 |
} |
3044 |
|
3045 |
ev_stop (EV_A_ (W)w); |
3046 |
|
3047 |
EV_FREQUENT_CHECK; |
3048 |
} |
3049 |
|
3050 |
void |
3051 |
ev_async_send (EV_P_ ev_async *w) |
3052 |
{ |
3053 |
w->sent = 1; |
3054 |
evpipe_write (EV_A_ &gotasync); |
3055 |
} |
3056 |
#endif |
3057 |
|
3058 |
/*****************************************************************************/ |
3059 |
|
3060 |
struct ev_once |
3061 |
{ |
3062 |
ev_io io; |
3063 |
ev_timer to; |
3064 |
void (*cb)(int revents, void *arg); |
3065 |
void *arg; |
3066 |
}; |
3067 |
|
3068 |
static void |
3069 |
once_cb (EV_P_ struct ev_once *once, int revents) |
3070 |
{ |
3071 |
void (*cb)(int revents, void *arg) = once->cb; |
3072 |
void *arg = once->arg; |
3073 |
|
3074 |
ev_io_stop (EV_A_ &once->io); |
3075 |
ev_timer_stop (EV_A_ &once->to); |
3076 |
ev_free (once); |
3077 |
|
3078 |
cb (revents, arg); |
3079 |
} |
3080 |
|
3081 |
static void |
3082 |
once_cb_io (EV_P_ ev_io *w, int revents) |
3083 |
{ |
3084 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); |
3085 |
|
3086 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); |
3087 |
} |
3088 |
|
3089 |
static void |
3090 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
3091 |
{ |
3092 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); |
3093 |
|
3094 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); |
3095 |
} |
3096 |
|
3097 |
void |
3098 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
3099 |
{ |
3100 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
3101 |
|
3102 |
if (expect_false (!once)) |
3103 |
{ |
3104 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
3105 |
return; |
3106 |
} |
3107 |
|
3108 |
once->cb = cb; |
3109 |
once->arg = arg; |
3110 |
|
3111 |
ev_init (&once->io, once_cb_io); |
3112 |
if (fd >= 0) |
3113 |
{ |
3114 |
ev_io_set (&once->io, fd, events); |
3115 |
ev_io_start (EV_A_ &once->io); |
3116 |
} |
3117 |
|
3118 |
ev_init (&once->to, once_cb_to); |
3119 |
if (timeout >= 0.) |
3120 |
{ |
3121 |
ev_timer_set (&once->to, timeout, 0.); |
3122 |
ev_timer_start (EV_A_ &once->to); |
3123 |
} |
3124 |
} |
3125 |
|
3126 |
#if EV_MULTIPLICITY |
3127 |
#include "ev_wrap.h" |
3128 |
#endif |
3129 |
|
3130 |
#ifdef __cplusplus |
3131 |
} |
3132 |
#endif |
3133 |
|