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/* |
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* libev event processing core, watcher management |
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* |
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* Copyright (c) 2007,2008,2009 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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# elif !defined(EV_USE_CLOCK_SYSCALL) |
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# define EV_USE_CLOCK_SYSCALL 0 |
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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 0 |
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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 !EV_USE_CLOCK_SYSCALL |
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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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/* 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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# ifdef SYS_clock_gettime |
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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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# else |
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# undef EV_USE_CLOCK_SYSCALL |
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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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/* 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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#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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|
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#if EV_MINPRI == EV_MAXPRI |
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# define ABSPRI(w) (((W)w), 0) |
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#else |
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# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
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#endif |
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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; |
410 |
|
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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_REALTIME |
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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_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
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#endif |
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|
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#if EV_USE_MONOTONIC |
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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); |
449 |
abort (); |
450 |
} |
451 |
} |
452 |
|
453 |
static void * |
454 |
ev_realloc_emul (void *ptr, long size) |
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{ |
456 |
/* some systems, notably openbsd and darwin, fail to properly |
457 |
* implement realloc (x, 0) (as required by both ansi c-98 and |
458 |
* the single unix specification, so work around them here. |
459 |
*/ |
460 |
|
461 |
if (size) |
462 |
return realloc (ptr, size); |
463 |
|
464 |
free (ptr); |
465 |
return 0; |
466 |
} |
467 |
|
468 |
static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; |
469 |
|
470 |
void |
471 |
ev_set_allocator (void *(*cb)(void *ptr, long size)) |
472 |
{ |
473 |
alloc = cb; |
474 |
} |
475 |
|
476 |
inline_speed void * |
477 |
ev_realloc (void *ptr, long size) |
478 |
{ |
479 |
ptr = alloc (ptr, size); |
480 |
|
481 |
if (!ptr && size) |
482 |
{ |
483 |
fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
484 |
abort (); |
485 |
} |
486 |
|
487 |
return ptr; |
488 |
} |
489 |
|
490 |
#define ev_malloc(size) ev_realloc (0, (size)) |
491 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
492 |
|
493 |
/*****************************************************************************/ |
494 |
|
495 |
/* set in reify when reification needed */ |
496 |
#define EV_ANFD_REIFY 1 |
497 |
|
498 |
/* file descriptor info structure */ |
499 |
typedef struct |
500 |
{ |
501 |
WL head; |
502 |
unsigned char events; /* the events watched for */ |
503 |
unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ |
504 |
unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ |
505 |
unsigned char unused; |
506 |
#if EV_USE_EPOLL |
507 |
unsigned int egen; /* generation counter to counter epoll bugs */ |
508 |
#endif |
509 |
#if EV_SELECT_IS_WINSOCKET |
510 |
SOCKET handle; |
511 |
#endif |
512 |
} ANFD; |
513 |
|
514 |
/* stores the pending event set for a given watcher */ |
515 |
typedef struct |
516 |
{ |
517 |
W w; |
518 |
int events; /* the pending event set for the given watcher */ |
519 |
} ANPENDING; |
520 |
|
521 |
#if EV_USE_INOTIFY |
522 |
/* hash table entry per inotify-id */ |
523 |
typedef struct |
524 |
{ |
525 |
WL head; |
526 |
} ANFS; |
527 |
#endif |
528 |
|
529 |
/* Heap Entry */ |
530 |
#if EV_HEAP_CACHE_AT |
531 |
/* a heap element */ |
532 |
typedef struct { |
533 |
ev_tstamp at; |
534 |
WT w; |
535 |
} ANHE; |
536 |
|
537 |
#define ANHE_w(he) (he).w /* access watcher, read-write */ |
538 |
#define ANHE_at(he) (he).at /* access cached at, read-only */ |
539 |
#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ |
540 |
#else |
541 |
/* a heap element */ |
542 |
typedef WT ANHE; |
543 |
|
544 |
#define ANHE_w(he) (he) |
545 |
#define ANHE_at(he) (he)->at |
546 |
#define ANHE_at_cache(he) |
547 |
#endif |
548 |
|
549 |
#if EV_MULTIPLICITY |
550 |
|
551 |
struct ev_loop |
552 |
{ |
553 |
ev_tstamp ev_rt_now; |
554 |
#define ev_rt_now ((loop)->ev_rt_now) |
555 |
#define VAR(name,decl) decl; |
556 |
#include "ev_vars.h" |
557 |
#undef VAR |
558 |
}; |
559 |
#include "ev_wrap.h" |
560 |
|
561 |
static struct ev_loop default_loop_struct; |
562 |
struct ev_loop *ev_default_loop_ptr; |
563 |
|
564 |
#else |
565 |
|
566 |
ev_tstamp ev_rt_now; |
567 |
#define VAR(name,decl) static decl; |
568 |
#include "ev_vars.h" |
569 |
#undef VAR |
570 |
|
571 |
static int ev_default_loop_ptr; |
572 |
|
573 |
#endif |
574 |
|
575 |
#if EV_MINIMAL < 2 |
576 |
# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) |
577 |
# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) |
578 |
# define EV_INVOKE_PENDING invoke_cb (EV_A) |
579 |
#else |
580 |
# define EV_RELEASE_CB (void)0 |
581 |
# define EV_ACQUIRE_CB (void)0 |
582 |
# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) |
583 |
#endif |
584 |
|
585 |
#define EVUNLOOP_RECURSE 0x80 |
586 |
|
587 |
/*****************************************************************************/ |
588 |
|
589 |
#ifndef EV_HAVE_EV_TIME |
590 |
ev_tstamp |
591 |
ev_time (void) |
592 |
{ |
593 |
#if EV_USE_REALTIME |
594 |
if (expect_true (have_realtime)) |
595 |
{ |
596 |
struct timespec ts; |
597 |
clock_gettime (CLOCK_REALTIME, &ts); |
598 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
599 |
} |
600 |
#endif |
601 |
|
602 |
struct timeval tv; |
603 |
gettimeofday (&tv, 0); |
604 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
605 |
} |
606 |
#endif |
607 |
|
608 |
inline_size ev_tstamp |
609 |
get_clock (void) |
610 |
{ |
611 |
#if EV_USE_MONOTONIC |
612 |
if (expect_true (have_monotonic)) |
613 |
{ |
614 |
struct timespec ts; |
615 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
616 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
617 |
} |
618 |
#endif |
619 |
|
620 |
return ev_time (); |
621 |
} |
622 |
|
623 |
#if EV_MULTIPLICITY |
624 |
ev_tstamp |
625 |
ev_now (EV_P) |
626 |
{ |
627 |
return ev_rt_now; |
628 |
} |
629 |
#endif |
630 |
|
631 |
void |
632 |
ev_sleep (ev_tstamp delay) |
633 |
{ |
634 |
if (delay > 0.) |
635 |
{ |
636 |
#if EV_USE_NANOSLEEP |
637 |
struct timespec ts; |
638 |
|
639 |
ts.tv_sec = (time_t)delay; |
640 |
ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); |
641 |
|
642 |
nanosleep (&ts, 0); |
643 |
#elif defined(_WIN32) |
644 |
Sleep ((unsigned long)(delay * 1e3)); |
645 |
#else |
646 |
struct timeval tv; |
647 |
|
648 |
tv.tv_sec = (time_t)delay; |
649 |
tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); |
650 |
|
651 |
/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ |
652 |
/* something not guaranteed by newer posix versions, but guaranteed */ |
653 |
/* by older ones */ |
654 |
select (0, 0, 0, 0, &tv); |
655 |
#endif |
656 |
} |
657 |
} |
658 |
|
659 |
/*****************************************************************************/ |
660 |
|
661 |
#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
662 |
|
663 |
/* find a suitable new size for the given array, */ |
664 |
/* hopefully by rounding to a ncie-to-malloc size */ |
665 |
inline_size int |
666 |
array_nextsize (int elem, int cur, int cnt) |
667 |
{ |
668 |
int ncur = cur + 1; |
669 |
|
670 |
do |
671 |
ncur <<= 1; |
672 |
while (cnt > ncur); |
673 |
|
674 |
/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ |
675 |
if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) |
676 |
{ |
677 |
ncur *= elem; |
678 |
ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); |
679 |
ncur = ncur - sizeof (void *) * 4; |
680 |
ncur /= elem; |
681 |
} |
682 |
|
683 |
return ncur; |
684 |
} |
685 |
|
686 |
static noinline void * |
687 |
array_realloc (int elem, void *base, int *cur, int cnt) |
688 |
{ |
689 |
*cur = array_nextsize (elem, *cur, cnt); |
690 |
return ev_realloc (base, elem * *cur); |
691 |
} |
692 |
|
693 |
#define array_init_zero(base,count) \ |
694 |
memset ((void *)(base), 0, sizeof (*(base)) * (count)) |
695 |
|
696 |
#define array_needsize(type,base,cur,cnt,init) \ |
697 |
if (expect_false ((cnt) > (cur))) \ |
698 |
{ \ |
699 |
int ocur_ = (cur); \ |
700 |
(base) = (type *)array_realloc \ |
701 |
(sizeof (type), (base), &(cur), (cnt)); \ |
702 |
init ((base) + (ocur_), (cur) - ocur_); \ |
703 |
} |
704 |
|
705 |
#if 0 |
706 |
#define array_slim(type,stem) \ |
707 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
708 |
{ \ |
709 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
710 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
711 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
712 |
} |
713 |
#endif |
714 |
|
715 |
#define array_free(stem, idx) \ |
716 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 |
717 |
|
718 |
/*****************************************************************************/ |
719 |
|
720 |
/* dummy callback for pending events */ |
721 |
static void noinline |
722 |
pendingcb (EV_P_ ev_prepare *w, int revents) |
723 |
{ |
724 |
} |
725 |
|
726 |
void noinline |
727 |
ev_feed_event (EV_P_ void *w, int revents) |
728 |
{ |
729 |
W w_ = (W)w; |
730 |
int pri = ABSPRI (w_); |
731 |
|
732 |
if (expect_false (w_->pending)) |
733 |
pendings [pri][w_->pending - 1].events |= revents; |
734 |
else |
735 |
{ |
736 |
w_->pending = ++pendingcnt [pri]; |
737 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
738 |
pendings [pri][w_->pending - 1].w = w_; |
739 |
pendings [pri][w_->pending - 1].events = revents; |
740 |
} |
741 |
} |
742 |
|
743 |
inline_speed void |
744 |
feed_reverse (EV_P_ W w) |
745 |
{ |
746 |
array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); |
747 |
rfeeds [rfeedcnt++] = w; |
748 |
} |
749 |
|
750 |
inline_size void |
751 |
feed_reverse_done (EV_P_ int revents) |
752 |
{ |
753 |
do |
754 |
ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); |
755 |
while (rfeedcnt); |
756 |
} |
757 |
|
758 |
inline_speed void |
759 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
760 |
{ |
761 |
int i; |
762 |
|
763 |
for (i = 0; i < eventcnt; ++i) |
764 |
ev_feed_event (EV_A_ events [i], type); |
765 |
} |
766 |
|
767 |
/*****************************************************************************/ |
768 |
|
769 |
inline_speed void |
770 |
fd_event_nc (EV_P_ int fd, int revents) |
771 |
{ |
772 |
ANFD *anfd = anfds + fd; |
773 |
ev_io *w; |
774 |
|
775 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
776 |
{ |
777 |
int ev = w->events & revents; |
778 |
|
779 |
if (ev) |
780 |
ev_feed_event (EV_A_ (W)w, ev); |
781 |
} |
782 |
} |
783 |
|
784 |
/* do not submit kernel events for fds that have reify set */ |
785 |
/* because that means they changed while we were polling for new events */ |
786 |
inline_speed void |
787 |
fd_event (EV_P_ int fd, int revents) |
788 |
{ |
789 |
ANFD *anfd = anfds + fd; |
790 |
|
791 |
if (expect_true (!anfd->reify)) |
792 |
fd_event_nc (EV_A_ fd, revents); |
793 |
} |
794 |
|
795 |
void |
796 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
797 |
{ |
798 |
if (fd >= 0 && fd < anfdmax) |
799 |
fd_event_nc (EV_A_ fd, revents); |
800 |
} |
801 |
|
802 |
/* make sure the external fd watch events are in-sync */ |
803 |
/* with the kernel/libev internal state */ |
804 |
inline_size void |
805 |
fd_reify (EV_P) |
806 |
{ |
807 |
int i; |
808 |
|
809 |
for (i = 0; i < fdchangecnt; ++i) |
810 |
{ |
811 |
int fd = fdchanges [i]; |
812 |
ANFD *anfd = anfds + fd; |
813 |
ev_io *w; |
814 |
|
815 |
unsigned char events = 0; |
816 |
|
817 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
818 |
events |= (unsigned char)w->events; |
819 |
|
820 |
#if EV_SELECT_IS_WINSOCKET |
821 |
if (events) |
822 |
{ |
823 |
unsigned long arg; |
824 |
#ifdef EV_FD_TO_WIN32_HANDLE |
825 |
anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
826 |
#else |
827 |
anfd->handle = _get_osfhandle (fd); |
828 |
#endif |
829 |
assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
830 |
} |
831 |
#endif |
832 |
|
833 |
{ |
834 |
unsigned char o_events = anfd->events; |
835 |
unsigned char o_reify = anfd->reify; |
836 |
|
837 |
anfd->reify = 0; |
838 |
anfd->events = events; |
839 |
|
840 |
if (o_events != events || o_reify & EV__IOFDSET) |
841 |
backend_modify (EV_A_ fd, o_events, events); |
842 |
} |
843 |
} |
844 |
|
845 |
fdchangecnt = 0; |
846 |
} |
847 |
|
848 |
/* something about the given fd changed */ |
849 |
inline_size void |
850 |
fd_change (EV_P_ int fd, int flags) |
851 |
{ |
852 |
unsigned char reify = anfds [fd].reify; |
853 |
anfds [fd].reify |= flags; |
854 |
|
855 |
if (expect_true (!reify)) |
856 |
{ |
857 |
++fdchangecnt; |
858 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
859 |
fdchanges [fdchangecnt - 1] = fd; |
860 |
} |
861 |
} |
862 |
|
863 |
/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ |
864 |
inline_speed void |
865 |
fd_kill (EV_P_ int fd) |
866 |
{ |
867 |
ev_io *w; |
868 |
|
869 |
while ((w = (ev_io *)anfds [fd].head)) |
870 |
{ |
871 |
ev_io_stop (EV_A_ w); |
872 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
873 |
} |
874 |
} |
875 |
|
876 |
/* check whether the given fd is atcually valid, for error recovery */ |
877 |
inline_size int |
878 |
fd_valid (int fd) |
879 |
{ |
880 |
#ifdef _WIN32 |
881 |
return _get_osfhandle (fd) != -1; |
882 |
#else |
883 |
return fcntl (fd, F_GETFD) != -1; |
884 |
#endif |
885 |
} |
886 |
|
887 |
/* called on EBADF to verify fds */ |
888 |
static void noinline |
889 |
fd_ebadf (EV_P) |
890 |
{ |
891 |
int fd; |
892 |
|
893 |
for (fd = 0; fd < anfdmax; ++fd) |
894 |
if (anfds [fd].events) |
895 |
if (!fd_valid (fd) && errno == EBADF) |
896 |
fd_kill (EV_A_ fd); |
897 |
} |
898 |
|
899 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
900 |
static void noinline |
901 |
fd_enomem (EV_P) |
902 |
{ |
903 |
int fd; |
904 |
|
905 |
for (fd = anfdmax; fd--; ) |
906 |
if (anfds [fd].events) |
907 |
{ |
908 |
fd_kill (EV_A_ fd); |
909 |
return; |
910 |
} |
911 |
} |
912 |
|
913 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
914 |
static void noinline |
915 |
fd_rearm_all (EV_P) |
916 |
{ |
917 |
int fd; |
918 |
|
919 |
for (fd = 0; fd < anfdmax; ++fd) |
920 |
if (anfds [fd].events) |
921 |
{ |
922 |
anfds [fd].events = 0; |
923 |
anfds [fd].emask = 0; |
924 |
fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); |
925 |
} |
926 |
} |
927 |
|
928 |
/*****************************************************************************/ |
929 |
|
930 |
/* |
931 |
* the heap functions want a real array index. array index 0 uis guaranteed to not |
932 |
* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives |
933 |
* the branching factor of the d-tree. |
934 |
*/ |
935 |
|
936 |
/* |
937 |
* at the moment we allow libev the luxury of two heaps, |
938 |
* a small-code-size 2-heap one and a ~1.5kb larger 4-heap |
939 |
* which is more cache-efficient. |
940 |
* the difference is about 5% with 50000+ watchers. |
941 |
*/ |
942 |
#if EV_USE_4HEAP |
943 |
|
944 |
#define DHEAP 4 |
945 |
#define HEAP0 (DHEAP - 1) /* index of first element in heap */ |
946 |
#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) |
947 |
#define UPHEAP_DONE(p,k) ((p) == (k)) |
948 |
|
949 |
/* away from the root */ |
950 |
inline_speed void |
951 |
downheap (ANHE *heap, int N, int k) |
952 |
{ |
953 |
ANHE he = heap [k]; |
954 |
ANHE *E = heap + N + HEAP0; |
955 |
|
956 |
for (;;) |
957 |
{ |
958 |
ev_tstamp minat; |
959 |
ANHE *minpos; |
960 |
ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; |
961 |
|
962 |
/* find minimum child */ |
963 |
if (expect_true (pos + DHEAP - 1 < E)) |
964 |
{ |
965 |
/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
966 |
if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
967 |
if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
968 |
if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
969 |
} |
970 |
else if (pos < E) |
971 |
{ |
972 |
/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
973 |
if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
974 |
if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
975 |
if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
976 |
} |
977 |
else |
978 |
break; |
979 |
|
980 |
if (ANHE_at (he) <= minat) |
981 |
break; |
982 |
|
983 |
heap [k] = *minpos; |
984 |
ev_active (ANHE_w (*minpos)) = k; |
985 |
|
986 |
k = minpos - heap; |
987 |
} |
988 |
|
989 |
heap [k] = he; |
990 |
ev_active (ANHE_w (he)) = k; |
991 |
} |
992 |
|
993 |
#else /* 4HEAP */ |
994 |
|
995 |
#define HEAP0 1 |
996 |
#define HPARENT(k) ((k) >> 1) |
997 |
#define UPHEAP_DONE(p,k) (!(p)) |
998 |
|
999 |
/* away from the root */ |
1000 |
inline_speed void |
1001 |
downheap (ANHE *heap, int N, int k) |
1002 |
{ |
1003 |
ANHE he = heap [k]; |
1004 |
|
1005 |
for (;;) |
1006 |
{ |
1007 |
int c = k << 1; |
1008 |
|
1009 |
if (c > N + HEAP0 - 1) |
1010 |
break; |
1011 |
|
1012 |
c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) |
1013 |
? 1 : 0; |
1014 |
|
1015 |
if (ANHE_at (he) <= ANHE_at (heap [c])) |
1016 |
break; |
1017 |
|
1018 |
heap [k] = heap [c]; |
1019 |
ev_active (ANHE_w (heap [k])) = k; |
1020 |
|
1021 |
k = c; |
1022 |
} |
1023 |
|
1024 |
heap [k] = he; |
1025 |
ev_active (ANHE_w (he)) = k; |
1026 |
} |
1027 |
#endif |
1028 |
|
1029 |
/* towards the root */ |
1030 |
inline_speed void |
1031 |
upheap (ANHE *heap, int k) |
1032 |
{ |
1033 |
ANHE he = heap [k]; |
1034 |
|
1035 |
for (;;) |
1036 |
{ |
1037 |
int p = HPARENT (k); |
1038 |
|
1039 |
if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) |
1040 |
break; |
1041 |
|
1042 |
heap [k] = heap [p]; |
1043 |
ev_active (ANHE_w (heap [k])) = k; |
1044 |
k = p; |
1045 |
} |
1046 |
|
1047 |
heap [k] = he; |
1048 |
ev_active (ANHE_w (he)) = k; |
1049 |
} |
1050 |
|
1051 |
/* move an element suitably so it is in a correct place */ |
1052 |
inline_size void |
1053 |
adjustheap (ANHE *heap, int N, int k) |
1054 |
{ |
1055 |
if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) |
1056 |
upheap (heap, k); |
1057 |
else |
1058 |
downheap (heap, N, k); |
1059 |
} |
1060 |
|
1061 |
/* rebuild the heap: this function is used only once and executed rarely */ |
1062 |
inline_size void |
1063 |
reheap (ANHE *heap, int N) |
1064 |
{ |
1065 |
int i; |
1066 |
|
1067 |
/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ |
1068 |
/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ |
1069 |
for (i = 0; i < N; ++i) |
1070 |
upheap (heap, i + HEAP0); |
1071 |
} |
1072 |
|
1073 |
/*****************************************************************************/ |
1074 |
|
1075 |
/* associate signal watchers to a signal signal */ |
1076 |
typedef struct |
1077 |
{ |
1078 |
WL head; |
1079 |
EV_ATOMIC_T gotsig; |
1080 |
} ANSIG; |
1081 |
|
1082 |
static ANSIG *signals; |
1083 |
static int signalmax; |
1084 |
|
1085 |
static EV_ATOMIC_T gotsig; |
1086 |
|
1087 |
/*****************************************************************************/ |
1088 |
|
1089 |
/* used to prepare libev internal fd's */ |
1090 |
/* this is not fork-safe */ |
1091 |
inline_speed void |
1092 |
fd_intern (int fd) |
1093 |
{ |
1094 |
#ifdef _WIN32 |
1095 |
unsigned long arg = 1; |
1096 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
1097 |
#else |
1098 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
1099 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
1100 |
#endif |
1101 |
} |
1102 |
|
1103 |
static void noinline |
1104 |
evpipe_init (EV_P) |
1105 |
{ |
1106 |
if (!ev_is_active (&pipe_w)) |
1107 |
{ |
1108 |
#if EV_USE_EVENTFD |
1109 |
if ((evfd = eventfd (0, 0)) >= 0) |
1110 |
{ |
1111 |
evpipe [0] = -1; |
1112 |
fd_intern (evfd); |
1113 |
ev_io_set (&pipe_w, evfd, EV_READ); |
1114 |
} |
1115 |
else |
1116 |
#endif |
1117 |
{ |
1118 |
while (pipe (evpipe)) |
1119 |
ev_syserr ("(libev) error creating signal/async pipe"); |
1120 |
|
1121 |
fd_intern (evpipe [0]); |
1122 |
fd_intern (evpipe [1]); |
1123 |
ev_io_set (&pipe_w, evpipe [0], EV_READ); |
1124 |
} |
1125 |
|
1126 |
ev_io_start (EV_A_ &pipe_w); |
1127 |
ev_unref (EV_A); /* watcher should not keep loop alive */ |
1128 |
} |
1129 |
} |
1130 |
|
1131 |
inline_size void |
1132 |
evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
1133 |
{ |
1134 |
if (!*flag) |
1135 |
{ |
1136 |
int old_errno = errno; /* save errno because write might clobber it */ |
1137 |
|
1138 |
*flag = 1; |
1139 |
|
1140 |
#if EV_USE_EVENTFD |
1141 |
if (evfd >= 0) |
1142 |
{ |
1143 |
uint64_t counter = 1; |
1144 |
write (evfd, &counter, sizeof (uint64_t)); |
1145 |
} |
1146 |
else |
1147 |
#endif |
1148 |
write (evpipe [1], &old_errno, 1); |
1149 |
|
1150 |
errno = old_errno; |
1151 |
} |
1152 |
} |
1153 |
|
1154 |
/* called whenever the libev signal pipe */ |
1155 |
/* got some events (signal, async) */ |
1156 |
static void |
1157 |
pipecb (EV_P_ ev_io *iow, int revents) |
1158 |
{ |
1159 |
#if EV_USE_EVENTFD |
1160 |
if (evfd >= 0) |
1161 |
{ |
1162 |
uint64_t counter; |
1163 |
read (evfd, &counter, sizeof (uint64_t)); |
1164 |
} |
1165 |
else |
1166 |
#endif |
1167 |
{ |
1168 |
char dummy; |
1169 |
read (evpipe [0], &dummy, 1); |
1170 |
} |
1171 |
|
1172 |
if (gotsig && ev_is_default_loop (EV_A)) |
1173 |
{ |
1174 |
int signum; |
1175 |
gotsig = 0; |
1176 |
|
1177 |
for (signum = signalmax; signum--; ) |
1178 |
if (signals [signum].gotsig) |
1179 |
ev_feed_signal_event (EV_A_ signum + 1); |
1180 |
} |
1181 |
|
1182 |
#if EV_ASYNC_ENABLE |
1183 |
if (gotasync) |
1184 |
{ |
1185 |
int i; |
1186 |
gotasync = 0; |
1187 |
|
1188 |
for (i = asynccnt; i--; ) |
1189 |
if (asyncs [i]->sent) |
1190 |
{ |
1191 |
asyncs [i]->sent = 0; |
1192 |
ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
1193 |
} |
1194 |
} |
1195 |
#endif |
1196 |
} |
1197 |
|
1198 |
/*****************************************************************************/ |
1199 |
|
1200 |
static void |
1201 |
ev_sighandler (int signum) |
1202 |
{ |
1203 |
#if EV_MULTIPLICITY |
1204 |
struct ev_loop *loop = &default_loop_struct; |
1205 |
#endif |
1206 |
|
1207 |
#if _WIN32 |
1208 |
signal (signum, ev_sighandler); |
1209 |
#endif |
1210 |
|
1211 |
signals [signum - 1].gotsig = 1; |
1212 |
evpipe_write (EV_A_ &gotsig); |
1213 |
} |
1214 |
|
1215 |
void noinline |
1216 |
ev_feed_signal_event (EV_P_ int signum) |
1217 |
{ |
1218 |
WL w; |
1219 |
|
1220 |
#if EV_MULTIPLICITY |
1221 |
assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
1222 |
#endif |
1223 |
|
1224 |
--signum; |
1225 |
|
1226 |
if (signum < 0 || signum >= signalmax) |
1227 |
return; |
1228 |
|
1229 |
signals [signum].gotsig = 0; |
1230 |
|
1231 |
for (w = signals [signum].head; w; w = w->next) |
1232 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
1233 |
} |
1234 |
|
1235 |
/*****************************************************************************/ |
1236 |
|
1237 |
static WL childs [EV_PID_HASHSIZE]; |
1238 |
|
1239 |
#ifndef _WIN32 |
1240 |
|
1241 |
static ev_signal childev; |
1242 |
|
1243 |
#ifndef WIFCONTINUED |
1244 |
# define WIFCONTINUED(status) 0 |
1245 |
#endif |
1246 |
|
1247 |
/* handle a single child status event */ |
1248 |
inline_speed void |
1249 |
child_reap (EV_P_ int chain, int pid, int status) |
1250 |
{ |
1251 |
ev_child *w; |
1252 |
int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
1253 |
|
1254 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
1255 |
{ |
1256 |
if ((w->pid == pid || !w->pid) |
1257 |
&& (!traced || (w->flags & 1))) |
1258 |
{ |
1259 |
ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ |
1260 |
w->rpid = pid; |
1261 |
w->rstatus = status; |
1262 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
1263 |
} |
1264 |
} |
1265 |
} |
1266 |
|
1267 |
#ifndef WCONTINUED |
1268 |
# define WCONTINUED 0 |
1269 |
#endif |
1270 |
|
1271 |
/* called on sigchld etc., calls waitpid */ |
1272 |
static void |
1273 |
childcb (EV_P_ ev_signal *sw, int revents) |
1274 |
{ |
1275 |
int pid, status; |
1276 |
|
1277 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
1278 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
1279 |
if (!WCONTINUED |
1280 |
|| errno != EINVAL |
1281 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
1282 |
return; |
1283 |
|
1284 |
/* make sure we are called again until all children have been reaped */ |
1285 |
/* we need to do it this way so that the callback gets called before we continue */ |
1286 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
1287 |
|
1288 |
child_reap (EV_A_ pid, pid, status); |
1289 |
if (EV_PID_HASHSIZE > 1) |
1290 |
child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
1291 |
} |
1292 |
|
1293 |
#endif |
1294 |
|
1295 |
/*****************************************************************************/ |
1296 |
|
1297 |
#if EV_USE_PORT |
1298 |
# include "ev_port.c" |
1299 |
#endif |
1300 |
#if EV_USE_KQUEUE |
1301 |
# include "ev_kqueue.c" |
1302 |
#endif |
1303 |
#if EV_USE_EPOLL |
1304 |
# include "ev_epoll.c" |
1305 |
#endif |
1306 |
#if EV_USE_POLL |
1307 |
# include "ev_poll.c" |
1308 |
#endif |
1309 |
#if EV_USE_SELECT |
1310 |
# include "ev_select.c" |
1311 |
#endif |
1312 |
|
1313 |
int |
1314 |
ev_version_major (void) |
1315 |
{ |
1316 |
return EV_VERSION_MAJOR; |
1317 |
} |
1318 |
|
1319 |
int |
1320 |
ev_version_minor (void) |
1321 |
{ |
1322 |
return EV_VERSION_MINOR; |
1323 |
} |
1324 |
|
1325 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
1326 |
int inline_size |
1327 |
enable_secure (void) |
1328 |
{ |
1329 |
#ifdef _WIN32 |
1330 |
return 0; |
1331 |
#else |
1332 |
return getuid () != geteuid () |
1333 |
|| getgid () != getegid (); |
1334 |
#endif |
1335 |
} |
1336 |
|
1337 |
unsigned int |
1338 |
ev_supported_backends (void) |
1339 |
{ |
1340 |
unsigned int flags = 0; |
1341 |
|
1342 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
1343 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
1344 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
1345 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
1346 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
1347 |
|
1348 |
return flags; |
1349 |
} |
1350 |
|
1351 |
unsigned int |
1352 |
ev_recommended_backends (void) |
1353 |
{ |
1354 |
unsigned int flags = ev_supported_backends (); |
1355 |
|
1356 |
#ifndef __NetBSD__ |
1357 |
/* kqueue is borked on everything but netbsd apparently */ |
1358 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
1359 |
flags &= ~EVBACKEND_KQUEUE; |
1360 |
#endif |
1361 |
#ifdef __APPLE__ |
1362 |
/* only select works correctly on that "unix-certified" platform */ |
1363 |
flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ |
1364 |
flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ |
1365 |
#endif |
1366 |
|
1367 |
return flags; |
1368 |
} |
1369 |
|
1370 |
unsigned int |
1371 |
ev_embeddable_backends (void) |
1372 |
{ |
1373 |
int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
1374 |
|
1375 |
/* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
1376 |
/* please fix it and tell me how to detect the fix */ |
1377 |
flags &= ~EVBACKEND_EPOLL; |
1378 |
|
1379 |
return flags; |
1380 |
} |
1381 |
|
1382 |
unsigned int |
1383 |
ev_backend (EV_P) |
1384 |
{ |
1385 |
return backend; |
1386 |
} |
1387 |
|
1388 |
#if EV_MINIMAL < 2 |
1389 |
unsigned int |
1390 |
ev_loop_count (EV_P) |
1391 |
{ |
1392 |
return loop_count; |
1393 |
} |
1394 |
|
1395 |
unsigned int |
1396 |
ev_loop_depth (EV_P) |
1397 |
{ |
1398 |
return loop_depth; |
1399 |
} |
1400 |
|
1401 |
void |
1402 |
ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
1403 |
{ |
1404 |
io_blocktime = interval; |
1405 |
} |
1406 |
|
1407 |
void |
1408 |
ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
1409 |
{ |
1410 |
timeout_blocktime = interval; |
1411 |
} |
1412 |
|
1413 |
void |
1414 |
ev_set_userdata (EV_P_ void *data) |
1415 |
{ |
1416 |
userdata = data; |
1417 |
} |
1418 |
|
1419 |
void * |
1420 |
ev_userdata (EV_P) |
1421 |
{ |
1422 |
return userdata; |
1423 |
} |
1424 |
|
1425 |
void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) |
1426 |
{ |
1427 |
invoke_cb = invoke_pending_cb; |
1428 |
} |
1429 |
|
1430 |
void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) |
1431 |
{ |
1432 |
release_cb = release; |
1433 |
acquire_cb = acquire; |
1434 |
} |
1435 |
#endif |
1436 |
|
1437 |
/* initialise a loop structure, must be zero-initialised */ |
1438 |
static void noinline |
1439 |
loop_init (EV_P_ unsigned int flags) |
1440 |
{ |
1441 |
if (!backend) |
1442 |
{ |
1443 |
#if EV_USE_REALTIME |
1444 |
if (!have_realtime) |
1445 |
{ |
1446 |
struct timespec ts; |
1447 |
|
1448 |
if (!clock_gettime (CLOCK_REALTIME, &ts)) |
1449 |
have_realtime = 1; |
1450 |
} |
1451 |
#endif |
1452 |
|
1453 |
#if EV_USE_MONOTONIC |
1454 |
if (!have_monotonic) |
1455 |
{ |
1456 |
struct timespec ts; |
1457 |
|
1458 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
1459 |
have_monotonic = 1; |
1460 |
} |
1461 |
#endif |
1462 |
|
1463 |
ev_rt_now = ev_time (); |
1464 |
mn_now = get_clock (); |
1465 |
now_floor = mn_now; |
1466 |
rtmn_diff = ev_rt_now - mn_now; |
1467 |
#if EV_MINIMAL < 2 |
1468 |
invoke_cb = ev_invoke_pending; |
1469 |
#endif |
1470 |
|
1471 |
io_blocktime = 0.; |
1472 |
timeout_blocktime = 0.; |
1473 |
backend = 0; |
1474 |
backend_fd = -1; |
1475 |
gotasync = 0; |
1476 |
#if EV_USE_INOTIFY |
1477 |
fs_fd = -2; |
1478 |
#endif |
1479 |
|
1480 |
/* pid check not overridable via env */ |
1481 |
#ifndef _WIN32 |
1482 |
if (flags & EVFLAG_FORKCHECK) |
1483 |
curpid = getpid (); |
1484 |
#endif |
1485 |
|
1486 |
if (!(flags & EVFLAG_NOENV) |
1487 |
&& !enable_secure () |
1488 |
&& getenv ("LIBEV_FLAGS")) |
1489 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
1490 |
|
1491 |
if (!(flags & 0x0000ffffU)) |
1492 |
flags |= ev_recommended_backends (); |
1493 |
|
1494 |
#if EV_USE_PORT |
1495 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
1496 |
#endif |
1497 |
#if EV_USE_KQUEUE |
1498 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
1499 |
#endif |
1500 |
#if EV_USE_EPOLL |
1501 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
1502 |
#endif |
1503 |
#if EV_USE_POLL |
1504 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
1505 |
#endif |
1506 |
#if EV_USE_SELECT |
1507 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
1508 |
#endif |
1509 |
|
1510 |
ev_prepare_init (&pending_w, pendingcb); |
1511 |
|
1512 |
ev_init (&pipe_w, pipecb); |
1513 |
ev_set_priority (&pipe_w, EV_MAXPRI); |
1514 |
} |
1515 |
} |
1516 |
|
1517 |
/* free up a loop structure */ |
1518 |
static void noinline |
1519 |
loop_destroy (EV_P) |
1520 |
{ |
1521 |
int i; |
1522 |
|
1523 |
if (ev_is_active (&pipe_w)) |
1524 |
{ |
1525 |
ev_ref (EV_A); /* signal watcher */ |
1526 |
ev_io_stop (EV_A_ &pipe_w); |
1527 |
|
1528 |
#if EV_USE_EVENTFD |
1529 |
if (evfd >= 0) |
1530 |
close (evfd); |
1531 |
#endif |
1532 |
|
1533 |
if (evpipe [0] >= 0) |
1534 |
{ |
1535 |
close (evpipe [0]); |
1536 |
close (evpipe [1]); |
1537 |
} |
1538 |
} |
1539 |
|
1540 |
#if EV_USE_INOTIFY |
1541 |
if (fs_fd >= 0) |
1542 |
close (fs_fd); |
1543 |
#endif |
1544 |
|
1545 |
if (backend_fd >= 0) |
1546 |
close (backend_fd); |
1547 |
|
1548 |
#if EV_USE_PORT |
1549 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
1550 |
#endif |
1551 |
#if EV_USE_KQUEUE |
1552 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
1553 |
#endif |
1554 |
#if EV_USE_EPOLL |
1555 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1556 |
#endif |
1557 |
#if EV_USE_POLL |
1558 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1559 |
#endif |
1560 |
#if EV_USE_SELECT |
1561 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1562 |
#endif |
1563 |
|
1564 |
for (i = NUMPRI; i--; ) |
1565 |
{ |
1566 |
array_free (pending, [i]); |
1567 |
#if EV_IDLE_ENABLE |
1568 |
array_free (idle, [i]); |
1569 |
#endif |
1570 |
} |
1571 |
|
1572 |
ev_free (anfds); anfdmax = 0; |
1573 |
|
1574 |
/* have to use the microsoft-never-gets-it-right macro */ |
1575 |
array_free (rfeed, EMPTY); |
1576 |
array_free (fdchange, EMPTY); |
1577 |
array_free (timer, EMPTY); |
1578 |
#if EV_PERIODIC_ENABLE |
1579 |
array_free (periodic, EMPTY); |
1580 |
#endif |
1581 |
#if EV_FORK_ENABLE |
1582 |
array_free (fork, EMPTY); |
1583 |
#endif |
1584 |
array_free (prepare, EMPTY); |
1585 |
array_free (check, EMPTY); |
1586 |
#if EV_ASYNC_ENABLE |
1587 |
array_free (async, EMPTY); |
1588 |
#endif |
1589 |
|
1590 |
backend = 0; |
1591 |
} |
1592 |
|
1593 |
#if EV_USE_INOTIFY |
1594 |
inline_size void infy_fork (EV_P); |
1595 |
#endif |
1596 |
|
1597 |
inline_size void |
1598 |
loop_fork (EV_P) |
1599 |
{ |
1600 |
#if EV_USE_PORT |
1601 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1602 |
#endif |
1603 |
#if EV_USE_KQUEUE |
1604 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1605 |
#endif |
1606 |
#if EV_USE_EPOLL |
1607 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1608 |
#endif |
1609 |
#if EV_USE_INOTIFY |
1610 |
infy_fork (EV_A); |
1611 |
#endif |
1612 |
|
1613 |
if (ev_is_active (&pipe_w)) |
1614 |
{ |
1615 |
/* this "locks" the handlers against writing to the pipe */ |
1616 |
/* while we modify the fd vars */ |
1617 |
gotsig = 1; |
1618 |
#if EV_ASYNC_ENABLE |
1619 |
gotasync = 1; |
1620 |
#endif |
1621 |
|
1622 |
ev_ref (EV_A); |
1623 |
ev_io_stop (EV_A_ &pipe_w); |
1624 |
|
1625 |
#if EV_USE_EVENTFD |
1626 |
if (evfd >= 0) |
1627 |
close (evfd); |
1628 |
#endif |
1629 |
|
1630 |
if (evpipe [0] >= 0) |
1631 |
{ |
1632 |
close (evpipe [0]); |
1633 |
close (evpipe [1]); |
1634 |
} |
1635 |
|
1636 |
evpipe_init (EV_A); |
1637 |
/* now iterate over everything, in case we missed something */ |
1638 |
pipecb (EV_A_ &pipe_w, EV_READ); |
1639 |
} |
1640 |
|
1641 |
postfork = 0; |
1642 |
} |
1643 |
|
1644 |
#if EV_MULTIPLICITY |
1645 |
|
1646 |
struct ev_loop * |
1647 |
ev_loop_new (unsigned int flags) |
1648 |
{ |
1649 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1650 |
|
1651 |
memset (loop, 0, sizeof (struct ev_loop)); |
1652 |
|
1653 |
loop_init (EV_A_ flags); |
1654 |
|
1655 |
if (ev_backend (EV_A)) |
1656 |
return loop; |
1657 |
|
1658 |
return 0; |
1659 |
} |
1660 |
|
1661 |
void |
1662 |
ev_loop_destroy (EV_P) |
1663 |
{ |
1664 |
loop_destroy (EV_A); |
1665 |
ev_free (loop); |
1666 |
} |
1667 |
|
1668 |
void |
1669 |
ev_loop_fork (EV_P) |
1670 |
{ |
1671 |
postfork = 1; /* must be in line with ev_default_fork */ |
1672 |
} |
1673 |
#endif /* multiplicity */ |
1674 |
|
1675 |
#if EV_VERIFY |
1676 |
static void noinline |
1677 |
verify_watcher (EV_P_ W w) |
1678 |
{ |
1679 |
assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); |
1680 |
|
1681 |
if (w->pending) |
1682 |
assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); |
1683 |
} |
1684 |
|
1685 |
static void noinline |
1686 |
verify_heap (EV_P_ ANHE *heap, int N) |
1687 |
{ |
1688 |
int i; |
1689 |
|
1690 |
for (i = HEAP0; i < N + HEAP0; ++i) |
1691 |
{ |
1692 |
assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); |
1693 |
assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); |
1694 |
assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); |
1695 |
|
1696 |
verify_watcher (EV_A_ (W)ANHE_w (heap [i])); |
1697 |
} |
1698 |
} |
1699 |
|
1700 |
static void noinline |
1701 |
array_verify (EV_P_ W *ws, int cnt) |
1702 |
{ |
1703 |
while (cnt--) |
1704 |
{ |
1705 |
assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); |
1706 |
verify_watcher (EV_A_ ws [cnt]); |
1707 |
} |
1708 |
} |
1709 |
#endif |
1710 |
|
1711 |
#if EV_MINIMAL < 2 |
1712 |
void |
1713 |
ev_loop_verify (EV_P) |
1714 |
{ |
1715 |
#if EV_VERIFY |
1716 |
int i; |
1717 |
WL w; |
1718 |
|
1719 |
assert (activecnt >= -1); |
1720 |
|
1721 |
assert (fdchangemax >= fdchangecnt); |
1722 |
for (i = 0; i < fdchangecnt; ++i) |
1723 |
assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); |
1724 |
|
1725 |
assert (anfdmax >= 0); |
1726 |
for (i = 0; i < anfdmax; ++i) |
1727 |
for (w = anfds [i].head; w; w = w->next) |
1728 |
{ |
1729 |
verify_watcher (EV_A_ (W)w); |
1730 |
assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); |
1731 |
assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); |
1732 |
} |
1733 |
|
1734 |
assert (timermax >= timercnt); |
1735 |
verify_heap (EV_A_ timers, timercnt); |
1736 |
|
1737 |
#if EV_PERIODIC_ENABLE |
1738 |
assert (periodicmax >= periodiccnt); |
1739 |
verify_heap (EV_A_ periodics, periodiccnt); |
1740 |
#endif |
1741 |
|
1742 |
for (i = NUMPRI; i--; ) |
1743 |
{ |
1744 |
assert (pendingmax [i] >= pendingcnt [i]); |
1745 |
#if EV_IDLE_ENABLE |
1746 |
assert (idleall >= 0); |
1747 |
assert (idlemax [i] >= idlecnt [i]); |
1748 |
array_verify (EV_A_ (W *)idles [i], idlecnt [i]); |
1749 |
#endif |
1750 |
} |
1751 |
|
1752 |
#if EV_FORK_ENABLE |
1753 |
assert (forkmax >= forkcnt); |
1754 |
array_verify (EV_A_ (W *)forks, forkcnt); |
1755 |
#endif |
1756 |
|
1757 |
#if EV_ASYNC_ENABLE |
1758 |
assert (asyncmax >= asynccnt); |
1759 |
array_verify (EV_A_ (W *)asyncs, asynccnt); |
1760 |
#endif |
1761 |
|
1762 |
assert (preparemax >= preparecnt); |
1763 |
array_verify (EV_A_ (W *)prepares, preparecnt); |
1764 |
|
1765 |
assert (checkmax >= checkcnt); |
1766 |
array_verify (EV_A_ (W *)checks, checkcnt); |
1767 |
|
1768 |
# if 0 |
1769 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
1770 |
for (signum = signalmax; signum--; ) if (signals [signum].gotsig) |
1771 |
# endif |
1772 |
#endif |
1773 |
} |
1774 |
#endif |
1775 |
|
1776 |
#if EV_MULTIPLICITY |
1777 |
struct ev_loop * |
1778 |
ev_default_loop_init (unsigned int flags) |
1779 |
#else |
1780 |
int |
1781 |
ev_default_loop (unsigned int flags) |
1782 |
#endif |
1783 |
{ |
1784 |
if (!ev_default_loop_ptr) |
1785 |
{ |
1786 |
#if EV_MULTIPLICITY |
1787 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
1788 |
#else |
1789 |
ev_default_loop_ptr = 1; |
1790 |
#endif |
1791 |
|
1792 |
loop_init (EV_A_ flags); |
1793 |
|
1794 |
if (ev_backend (EV_A)) |
1795 |
{ |
1796 |
#ifndef _WIN32 |
1797 |
ev_signal_init (&childev, childcb, SIGCHLD); |
1798 |
ev_set_priority (&childev, EV_MAXPRI); |
1799 |
ev_signal_start (EV_A_ &childev); |
1800 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
1801 |
#endif |
1802 |
} |
1803 |
else |
1804 |
ev_default_loop_ptr = 0; |
1805 |
} |
1806 |
|
1807 |
return ev_default_loop_ptr; |
1808 |
} |
1809 |
|
1810 |
void |
1811 |
ev_default_destroy (void) |
1812 |
{ |
1813 |
#if EV_MULTIPLICITY |
1814 |
struct ev_loop *loop = ev_default_loop_ptr; |
1815 |
#endif |
1816 |
|
1817 |
ev_default_loop_ptr = 0; |
1818 |
|
1819 |
#ifndef _WIN32 |
1820 |
ev_ref (EV_A); /* child watcher */ |
1821 |
ev_signal_stop (EV_A_ &childev); |
1822 |
#endif |
1823 |
|
1824 |
loop_destroy (EV_A); |
1825 |
} |
1826 |
|
1827 |
void |
1828 |
ev_default_fork (void) |
1829 |
{ |
1830 |
#if EV_MULTIPLICITY |
1831 |
struct ev_loop *loop = ev_default_loop_ptr; |
1832 |
#endif |
1833 |
|
1834 |
postfork = 1; /* must be in line with ev_loop_fork */ |
1835 |
} |
1836 |
|
1837 |
/*****************************************************************************/ |
1838 |
|
1839 |
void |
1840 |
ev_invoke (EV_P_ void *w, int revents) |
1841 |
{ |
1842 |
EV_CB_INVOKE ((W)w, revents); |
1843 |
} |
1844 |
|
1845 |
unsigned int |
1846 |
ev_pending_count (EV_P) |
1847 |
{ |
1848 |
int pri; |
1849 |
unsigned int count = 0; |
1850 |
|
1851 |
for (pri = NUMPRI; pri--; ) |
1852 |
count += pendingcnt [pri]; |
1853 |
|
1854 |
return count; |
1855 |
} |
1856 |
|
1857 |
void noinline |
1858 |
ev_invoke_pending (EV_P) |
1859 |
{ |
1860 |
int pri; |
1861 |
|
1862 |
for (pri = NUMPRI; pri--; ) |
1863 |
while (pendingcnt [pri]) |
1864 |
{ |
1865 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1866 |
|
1867 |
/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ |
1868 |
/* ^ this is no longer true, as pending_w could be here */ |
1869 |
|
1870 |
p->w->pending = 0; |
1871 |
EV_CB_INVOKE (p->w, p->events); |
1872 |
EV_FREQUENT_CHECK; |
1873 |
} |
1874 |
} |
1875 |
|
1876 |
#if EV_IDLE_ENABLE |
1877 |
/* make idle watchers pending. this handles the "call-idle */ |
1878 |
/* only when higher priorities are idle" logic */ |
1879 |
inline_size void |
1880 |
idle_reify (EV_P) |
1881 |
{ |
1882 |
if (expect_false (idleall)) |
1883 |
{ |
1884 |
int pri; |
1885 |
|
1886 |
for (pri = NUMPRI; pri--; ) |
1887 |
{ |
1888 |
if (pendingcnt [pri]) |
1889 |
break; |
1890 |
|
1891 |
if (idlecnt [pri]) |
1892 |
{ |
1893 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
1894 |
break; |
1895 |
} |
1896 |
} |
1897 |
} |
1898 |
} |
1899 |
#endif |
1900 |
|
1901 |
/* make timers pending */ |
1902 |
inline_size void |
1903 |
timers_reify (EV_P) |
1904 |
{ |
1905 |
EV_FREQUENT_CHECK; |
1906 |
|
1907 |
if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) |
1908 |
{ |
1909 |
do |
1910 |
{ |
1911 |
ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); |
1912 |
|
1913 |
/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ |
1914 |
|
1915 |
/* first reschedule or stop timer */ |
1916 |
if (w->repeat) |
1917 |
{ |
1918 |
ev_at (w) += w->repeat; |
1919 |
if (ev_at (w) < mn_now) |
1920 |
ev_at (w) = mn_now; |
1921 |
|
1922 |
assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1923 |
|
1924 |
ANHE_at_cache (timers [HEAP0]); |
1925 |
downheap (timers, timercnt, HEAP0); |
1926 |
} |
1927 |
else |
1928 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1929 |
|
1930 |
EV_FREQUENT_CHECK; |
1931 |
feed_reverse (EV_A_ (W)w); |
1932 |
} |
1933 |
while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); |
1934 |
|
1935 |
feed_reverse_done (EV_A_ EV_TIMEOUT); |
1936 |
} |
1937 |
} |
1938 |
|
1939 |
#if EV_PERIODIC_ENABLE |
1940 |
/* make periodics pending */ |
1941 |
inline_size void |
1942 |
periodics_reify (EV_P) |
1943 |
{ |
1944 |
EV_FREQUENT_CHECK; |
1945 |
|
1946 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) |
1947 |
{ |
1948 |
int feed_count = 0; |
1949 |
|
1950 |
do |
1951 |
{ |
1952 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); |
1953 |
|
1954 |
/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ |
1955 |
|
1956 |
/* first reschedule or stop timer */ |
1957 |
if (w->reschedule_cb) |
1958 |
{ |
1959 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
1960 |
|
1961 |
assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); |
1962 |
|
1963 |
ANHE_at_cache (periodics [HEAP0]); |
1964 |
downheap (periodics, periodiccnt, HEAP0); |
1965 |
} |
1966 |
else if (w->interval) |
1967 |
{ |
1968 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1969 |
/* if next trigger time is not sufficiently in the future, put it there */ |
1970 |
/* this might happen because of floating point inexactness */ |
1971 |
if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
1972 |
{ |
1973 |
ev_at (w) += w->interval; |
1974 |
|
1975 |
/* if interval is unreasonably low we might still have a time in the past */ |
1976 |
/* so correct this. this will make the periodic very inexact, but the user */ |
1977 |
/* has effectively asked to get triggered more often than possible */ |
1978 |
if (ev_at (w) < ev_rt_now) |
1979 |
ev_at (w) = ev_rt_now; |
1980 |
} |
1981 |
|
1982 |
ANHE_at_cache (periodics [HEAP0]); |
1983 |
downheap (periodics, periodiccnt, HEAP0); |
1984 |
} |
1985 |
else |
1986 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1987 |
|
1988 |
EV_FREQUENT_CHECK; |
1989 |
feed_reverse (EV_A_ (W)w); |
1990 |
} |
1991 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); |
1992 |
|
1993 |
feed_reverse_done (EV_A_ EV_PERIODIC); |
1994 |
} |
1995 |
} |
1996 |
|
1997 |
/* simply recalculate all periodics */ |
1998 |
/* TODO: maybe ensure that at leats one event happens when jumping forward? */ |
1999 |
static void noinline |
2000 |
periodics_reschedule (EV_P) |
2001 |
{ |
2002 |
int i; |
2003 |
|
2004 |
/* adjust periodics after time jump */ |
2005 |
for (i = HEAP0; i < periodiccnt + HEAP0; ++i) |
2006 |
{ |
2007 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
2008 |
|
2009 |
if (w->reschedule_cb) |
2010 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2011 |
else if (w->interval) |
2012 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2013 |
|
2014 |
ANHE_at_cache (periodics [i]); |
2015 |
} |
2016 |
|
2017 |
reheap (periodics, periodiccnt); |
2018 |
} |
2019 |
#endif |
2020 |
|
2021 |
/* adjust all timers by a given offset */ |
2022 |
static void noinline |
2023 |
timers_reschedule (EV_P_ ev_tstamp adjust) |
2024 |
{ |
2025 |
int i; |
2026 |
|
2027 |
for (i = 0; i < timercnt; ++i) |
2028 |
{ |
2029 |
ANHE *he = timers + i + HEAP0; |
2030 |
ANHE_w (*he)->at += adjust; |
2031 |
ANHE_at_cache (*he); |
2032 |
} |
2033 |
} |
2034 |
|
2035 |
/* fetch new monotonic and realtime times from the kernel */ |
2036 |
/* also detetc if there was a timejump, and act accordingly */ |
2037 |
inline_speed void |
2038 |
time_update (EV_P_ ev_tstamp max_block) |
2039 |
{ |
2040 |
#if EV_USE_MONOTONIC |
2041 |
if (expect_true (have_monotonic)) |
2042 |
{ |
2043 |
int i; |
2044 |
ev_tstamp odiff = rtmn_diff; |
2045 |
|
2046 |
mn_now = get_clock (); |
2047 |
|
2048 |
/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
2049 |
/* interpolate in the meantime */ |
2050 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
2051 |
{ |
2052 |
ev_rt_now = rtmn_diff + mn_now; |
2053 |
return; |
2054 |
} |
2055 |
|
2056 |
now_floor = mn_now; |
2057 |
ev_rt_now = ev_time (); |
2058 |
|
2059 |
/* loop a few times, before making important decisions. |
2060 |
* on the choice of "4": one iteration isn't enough, |
2061 |
* in case we get preempted during the calls to |
2062 |
* ev_time and get_clock. a second call is almost guaranteed |
2063 |
* to succeed in that case, though. and looping a few more times |
2064 |
* doesn't hurt either as we only do this on time-jumps or |
2065 |
* in the unlikely event of having been preempted here. |
2066 |
*/ |
2067 |
for (i = 4; --i; ) |
2068 |
{ |
2069 |
rtmn_diff = ev_rt_now - mn_now; |
2070 |
|
2071 |
if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) |
2072 |
return; /* all is well */ |
2073 |
|
2074 |
ev_rt_now = ev_time (); |
2075 |
mn_now = get_clock (); |
2076 |
now_floor = mn_now; |
2077 |
} |
2078 |
|
2079 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
2080 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
2081 |
# if EV_PERIODIC_ENABLE |
2082 |
periodics_reschedule (EV_A); |
2083 |
# endif |
2084 |
} |
2085 |
else |
2086 |
#endif |
2087 |
{ |
2088 |
ev_rt_now = ev_time (); |
2089 |
|
2090 |
if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
2091 |
{ |
2092 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
2093 |
timers_reschedule (EV_A_ ev_rt_now - mn_now); |
2094 |
#if EV_PERIODIC_ENABLE |
2095 |
periodics_reschedule (EV_A); |
2096 |
#endif |
2097 |
} |
2098 |
|
2099 |
mn_now = ev_rt_now; |
2100 |
} |
2101 |
} |
2102 |
|
2103 |
void |
2104 |
ev_loop (EV_P_ int flags) |
2105 |
{ |
2106 |
#if EV_MINIMAL < 2 |
2107 |
++loop_depth; |
2108 |
#endif |
2109 |
|
2110 |
assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); |
2111 |
|
2112 |
loop_done = EVUNLOOP_CANCEL; |
2113 |
|
2114 |
EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ |
2115 |
|
2116 |
do |
2117 |
{ |
2118 |
#if EV_VERIFY >= 2 |
2119 |
ev_loop_verify (EV_A); |
2120 |
#endif |
2121 |
|
2122 |
#ifndef _WIN32 |
2123 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
2124 |
if (expect_false (getpid () != curpid)) |
2125 |
{ |
2126 |
curpid = getpid (); |
2127 |
postfork = 1; |
2128 |
} |
2129 |
#endif |
2130 |
|
2131 |
#if EV_FORK_ENABLE |
2132 |
/* we might have forked, so queue fork handlers */ |
2133 |
if (expect_false (postfork)) |
2134 |
if (forkcnt) |
2135 |
{ |
2136 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
2137 |
EV_INVOKE_PENDING; |
2138 |
} |
2139 |
#endif |
2140 |
|
2141 |
/* queue prepare watchers (and execute them) */ |
2142 |
if (expect_false (preparecnt)) |
2143 |
{ |
2144 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
2145 |
EV_INVOKE_PENDING; |
2146 |
} |
2147 |
|
2148 |
if (expect_false (loop_done)) |
2149 |
break; |
2150 |
|
2151 |
/* we might have forked, so reify kernel state if necessary */ |
2152 |
if (expect_false (postfork)) |
2153 |
loop_fork (EV_A); |
2154 |
|
2155 |
/* update fd-related kernel structures */ |
2156 |
fd_reify (EV_A); |
2157 |
|
2158 |
/* calculate blocking time */ |
2159 |
{ |
2160 |
ev_tstamp waittime = 0.; |
2161 |
ev_tstamp sleeptime = 0.; |
2162 |
|
2163 |
if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) |
2164 |
{ |
2165 |
/* remember old timestamp for io_blocktime calculation */ |
2166 |
ev_tstamp prev_mn_now = mn_now; |
2167 |
|
2168 |
/* update time to cancel out callback processing overhead */ |
2169 |
time_update (EV_A_ 1e100); |
2170 |
|
2171 |
waittime = MAX_BLOCKTIME; |
2172 |
|
2173 |
if (timercnt) |
2174 |
{ |
2175 |
ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; |
2176 |
if (waittime > to) waittime = to; |
2177 |
} |
2178 |
|
2179 |
#if EV_PERIODIC_ENABLE |
2180 |
if (periodiccnt) |
2181 |
{ |
2182 |
ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; |
2183 |
if (waittime > to) waittime = to; |
2184 |
} |
2185 |
#endif |
2186 |
|
2187 |
/* don't let timeouts decrease the waittime below timeout_blocktime */ |
2188 |
if (expect_false (waittime < timeout_blocktime)) |
2189 |
waittime = timeout_blocktime; |
2190 |
|
2191 |
/* extra check because io_blocktime is commonly 0 */ |
2192 |
if (expect_false (io_blocktime)) |
2193 |
{ |
2194 |
sleeptime = io_blocktime - (mn_now - prev_mn_now); |
2195 |
|
2196 |
if (sleeptime > waittime - backend_fudge) |
2197 |
sleeptime = waittime - backend_fudge; |
2198 |
|
2199 |
if (expect_true (sleeptime > 0.)) |
2200 |
{ |
2201 |
ev_sleep (sleeptime); |
2202 |
waittime -= sleeptime; |
2203 |
} |
2204 |
} |
2205 |
} |
2206 |
|
2207 |
#if EV_MINIMAL < 2 |
2208 |
++loop_count; |
2209 |
#endif |
2210 |
assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ |
2211 |
backend_poll (EV_A_ waittime); |
2212 |
assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ |
2213 |
|
2214 |
/* update ev_rt_now, do magic */ |
2215 |
time_update (EV_A_ waittime + sleeptime); |
2216 |
} |
2217 |
|
2218 |
/* queue pending timers and reschedule them */ |
2219 |
timers_reify (EV_A); /* relative timers called last */ |
2220 |
#if EV_PERIODIC_ENABLE |
2221 |
periodics_reify (EV_A); /* absolute timers called first */ |
2222 |
#endif |
2223 |
|
2224 |
#if EV_IDLE_ENABLE |
2225 |
/* queue idle watchers unless other events are pending */ |
2226 |
idle_reify (EV_A); |
2227 |
#endif |
2228 |
|
2229 |
/* queue check watchers, to be executed first */ |
2230 |
if (expect_false (checkcnt)) |
2231 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
2232 |
|
2233 |
EV_INVOKE_PENDING; |
2234 |
} |
2235 |
while (expect_true ( |
2236 |
activecnt |
2237 |
&& !loop_done |
2238 |
&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) |
2239 |
)); |
2240 |
|
2241 |
if (loop_done == EVUNLOOP_ONE) |
2242 |
loop_done = EVUNLOOP_CANCEL; |
2243 |
|
2244 |
#if EV_MINIMAL < 2 |
2245 |
--loop_depth; |
2246 |
#endif |
2247 |
} |
2248 |
|
2249 |
void |
2250 |
ev_unloop (EV_P_ int how) |
2251 |
{ |
2252 |
loop_done = how; |
2253 |
} |
2254 |
|
2255 |
void |
2256 |
ev_ref (EV_P) |
2257 |
{ |
2258 |
++activecnt; |
2259 |
} |
2260 |
|
2261 |
void |
2262 |
ev_unref (EV_P) |
2263 |
{ |
2264 |
--activecnt; |
2265 |
} |
2266 |
|
2267 |
void |
2268 |
ev_now_update (EV_P) |
2269 |
{ |
2270 |
time_update (EV_A_ 1e100); |
2271 |
} |
2272 |
|
2273 |
void |
2274 |
ev_suspend (EV_P) |
2275 |
{ |
2276 |
ev_now_update (EV_A); |
2277 |
} |
2278 |
|
2279 |
void |
2280 |
ev_resume (EV_P) |
2281 |
{ |
2282 |
ev_tstamp mn_prev = mn_now; |
2283 |
|
2284 |
ev_now_update (EV_A); |
2285 |
timers_reschedule (EV_A_ mn_now - mn_prev); |
2286 |
#if EV_PERIODIC_ENABLE |
2287 |
/* TODO: really do this? */ |
2288 |
periodics_reschedule (EV_A); |
2289 |
#endif |
2290 |
} |
2291 |
|
2292 |
/*****************************************************************************/ |
2293 |
/* singly-linked list management, used when the expected list length is short */ |
2294 |
|
2295 |
inline_size void |
2296 |
wlist_add (WL *head, WL elem) |
2297 |
{ |
2298 |
elem->next = *head; |
2299 |
*head = elem; |
2300 |
} |
2301 |
|
2302 |
inline_size void |
2303 |
wlist_del (WL *head, WL elem) |
2304 |
{ |
2305 |
while (*head) |
2306 |
{ |
2307 |
if (*head == elem) |
2308 |
{ |
2309 |
*head = elem->next; |
2310 |
return; |
2311 |
} |
2312 |
|
2313 |
head = &(*head)->next; |
2314 |
} |
2315 |
} |
2316 |
|
2317 |
/* internal, faster, version of ev_clear_pending */ |
2318 |
inline_speed void |
2319 |
clear_pending (EV_P_ W w) |
2320 |
{ |
2321 |
if (w->pending) |
2322 |
{ |
2323 |
pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; |
2324 |
w->pending = 0; |
2325 |
} |
2326 |
} |
2327 |
|
2328 |
int |
2329 |
ev_clear_pending (EV_P_ void *w) |
2330 |
{ |
2331 |
W w_ = (W)w; |
2332 |
int pending = w_->pending; |
2333 |
|
2334 |
if (expect_true (pending)) |
2335 |
{ |
2336 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
2337 |
p->w = (W)&pending_w; |
2338 |
w_->pending = 0; |
2339 |
return p->events; |
2340 |
} |
2341 |
else |
2342 |
return 0; |
2343 |
} |
2344 |
|
2345 |
inline_size void |
2346 |
pri_adjust (EV_P_ W w) |
2347 |
{ |
2348 |
int pri = ev_priority (w); |
2349 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
2350 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
2351 |
ev_set_priority (w, pri); |
2352 |
} |
2353 |
|
2354 |
inline_speed void |
2355 |
ev_start (EV_P_ W w, int active) |
2356 |
{ |
2357 |
pri_adjust (EV_A_ w); |
2358 |
w->active = active; |
2359 |
ev_ref (EV_A); |
2360 |
} |
2361 |
|
2362 |
inline_size void |
2363 |
ev_stop (EV_P_ W w) |
2364 |
{ |
2365 |
ev_unref (EV_A); |
2366 |
w->active = 0; |
2367 |
} |
2368 |
|
2369 |
/*****************************************************************************/ |
2370 |
|
2371 |
void noinline |
2372 |
ev_io_start (EV_P_ ev_io *w) |
2373 |
{ |
2374 |
int fd = w->fd; |
2375 |
|
2376 |
if (expect_false (ev_is_active (w))) |
2377 |
return; |
2378 |
|
2379 |
assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2380 |
assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2381 |
|
2382 |
EV_FREQUENT_CHECK; |
2383 |
|
2384 |
ev_start (EV_A_ (W)w, 1); |
2385 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2386 |
wlist_add (&anfds[fd].head, (WL)w); |
2387 |
|
2388 |
fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); |
2389 |
w->events &= ~EV__IOFDSET; |
2390 |
|
2391 |
EV_FREQUENT_CHECK; |
2392 |
} |
2393 |
|
2394 |
void noinline |
2395 |
ev_io_stop (EV_P_ ev_io *w) |
2396 |
{ |
2397 |
clear_pending (EV_A_ (W)w); |
2398 |
if (expect_false (!ev_is_active (w))) |
2399 |
return; |
2400 |
|
2401 |
assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
2402 |
|
2403 |
EV_FREQUENT_CHECK; |
2404 |
|
2405 |
wlist_del (&anfds[w->fd].head, (WL)w); |
2406 |
ev_stop (EV_A_ (W)w); |
2407 |
|
2408 |
fd_change (EV_A_ w->fd, 1); |
2409 |
|
2410 |
EV_FREQUENT_CHECK; |
2411 |
} |
2412 |
|
2413 |
void noinline |
2414 |
ev_timer_start (EV_P_ ev_timer *w) |
2415 |
{ |
2416 |
if (expect_false (ev_is_active (w))) |
2417 |
return; |
2418 |
|
2419 |
ev_at (w) += mn_now; |
2420 |
|
2421 |
assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
2422 |
|
2423 |
EV_FREQUENT_CHECK; |
2424 |
|
2425 |
++timercnt; |
2426 |
ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); |
2427 |
array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); |
2428 |
ANHE_w (timers [ev_active (w)]) = (WT)w; |
2429 |
ANHE_at_cache (timers [ev_active (w)]); |
2430 |
upheap (timers, ev_active (w)); |
2431 |
|
2432 |
EV_FREQUENT_CHECK; |
2433 |
|
2434 |
/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ |
2435 |
} |
2436 |
|
2437 |
void noinline |
2438 |
ev_timer_stop (EV_P_ ev_timer *w) |
2439 |
{ |
2440 |
clear_pending (EV_A_ (W)w); |
2441 |
if (expect_false (!ev_is_active (w))) |
2442 |
return; |
2443 |
|
2444 |
EV_FREQUENT_CHECK; |
2445 |
|
2446 |
{ |
2447 |
int active = ev_active (w); |
2448 |
|
2449 |
assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); |
2450 |
|
2451 |
--timercnt; |
2452 |
|
2453 |
if (expect_true (active < timercnt + HEAP0)) |
2454 |
{ |
2455 |
timers [active] = timers [timercnt + HEAP0]; |
2456 |
adjustheap (timers, timercnt, active); |
2457 |
} |
2458 |
} |
2459 |
|
2460 |
EV_FREQUENT_CHECK; |
2461 |
|
2462 |
ev_at (w) -= mn_now; |
2463 |
|
2464 |
ev_stop (EV_A_ (W)w); |
2465 |
} |
2466 |
|
2467 |
void noinline |
2468 |
ev_timer_again (EV_P_ ev_timer *w) |
2469 |
{ |
2470 |
EV_FREQUENT_CHECK; |
2471 |
|
2472 |
if (ev_is_active (w)) |
2473 |
{ |
2474 |
if (w->repeat) |
2475 |
{ |
2476 |
ev_at (w) = mn_now + w->repeat; |
2477 |
ANHE_at_cache (timers [ev_active (w)]); |
2478 |
adjustheap (timers, timercnt, ev_active (w)); |
2479 |
} |
2480 |
else |
2481 |
ev_timer_stop (EV_A_ w); |
2482 |
} |
2483 |
else if (w->repeat) |
2484 |
{ |
2485 |
ev_at (w) = w->repeat; |
2486 |
ev_timer_start (EV_A_ w); |
2487 |
} |
2488 |
|
2489 |
EV_FREQUENT_CHECK; |
2490 |
} |
2491 |
|
2492 |
ev_tstamp |
2493 |
ev_timer_remaining (EV_P_ ev_timer *w) |
2494 |
{ |
2495 |
return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); |
2496 |
} |
2497 |
|
2498 |
#if EV_PERIODIC_ENABLE |
2499 |
void noinline |
2500 |
ev_periodic_start (EV_P_ ev_periodic *w) |
2501 |
{ |
2502 |
if (expect_false (ev_is_active (w))) |
2503 |
return; |
2504 |
|
2505 |
if (w->reschedule_cb) |
2506 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2507 |
else if (w->interval) |
2508 |
{ |
2509 |
assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2510 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
2511 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2512 |
} |
2513 |
else |
2514 |
ev_at (w) = w->offset; |
2515 |
|
2516 |
EV_FREQUENT_CHECK; |
2517 |
|
2518 |
++periodiccnt; |
2519 |
ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); |
2520 |
array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); |
2521 |
ANHE_w (periodics [ev_active (w)]) = (WT)w; |
2522 |
ANHE_at_cache (periodics [ev_active (w)]); |
2523 |
upheap (periodics, ev_active (w)); |
2524 |
|
2525 |
EV_FREQUENT_CHECK; |
2526 |
|
2527 |
/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ |
2528 |
} |
2529 |
|
2530 |
void noinline |
2531 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
2532 |
{ |
2533 |
clear_pending (EV_A_ (W)w); |
2534 |
if (expect_false (!ev_is_active (w))) |
2535 |
return; |
2536 |
|
2537 |
EV_FREQUENT_CHECK; |
2538 |
|
2539 |
{ |
2540 |
int active = ev_active (w); |
2541 |
|
2542 |
assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); |
2543 |
|
2544 |
--periodiccnt; |
2545 |
|
2546 |
if (expect_true (active < periodiccnt + HEAP0)) |
2547 |
{ |
2548 |
periodics [active] = periodics [periodiccnt + HEAP0]; |
2549 |
adjustheap (periodics, periodiccnt, active); |
2550 |
} |
2551 |
} |
2552 |
|
2553 |
EV_FREQUENT_CHECK; |
2554 |
|
2555 |
ev_stop (EV_A_ (W)w); |
2556 |
} |
2557 |
|
2558 |
void noinline |
2559 |
ev_periodic_again (EV_P_ ev_periodic *w) |
2560 |
{ |
2561 |
/* TODO: use adjustheap and recalculation */ |
2562 |
ev_periodic_stop (EV_A_ w); |
2563 |
ev_periodic_start (EV_A_ w); |
2564 |
} |
2565 |
#endif |
2566 |
|
2567 |
#ifndef SA_RESTART |
2568 |
# define SA_RESTART 0 |
2569 |
#endif |
2570 |
|
2571 |
void noinline |
2572 |
ev_signal_start (EV_P_ ev_signal *w) |
2573 |
{ |
2574 |
#if EV_MULTIPLICITY |
2575 |
assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
2576 |
#endif |
2577 |
if (expect_false (ev_is_active (w))) |
2578 |
return; |
2579 |
|
2580 |
assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); |
2581 |
|
2582 |
evpipe_init (EV_A); |
2583 |
|
2584 |
EV_FREQUENT_CHECK; |
2585 |
|
2586 |
{ |
2587 |
#ifndef _WIN32 |
2588 |
sigset_t full, prev; |
2589 |
sigfillset (&full); |
2590 |
sigprocmask (SIG_SETMASK, &full, &prev); |
2591 |
#endif |
2592 |
|
2593 |
array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); |
2594 |
|
2595 |
#ifndef _WIN32 |
2596 |
sigprocmask (SIG_SETMASK, &prev, 0); |
2597 |
#endif |
2598 |
} |
2599 |
|
2600 |
ev_start (EV_A_ (W)w, 1); |
2601 |
wlist_add (&signals [w->signum - 1].head, (WL)w); |
2602 |
|
2603 |
if (!((WL)w)->next) |
2604 |
{ |
2605 |
#if _WIN32 |
2606 |
signal (w->signum, ev_sighandler); |
2607 |
#else |
2608 |
struct sigaction sa = { }; |
2609 |
sa.sa_handler = ev_sighandler; |
2610 |
sigfillset (&sa.sa_mask); |
2611 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2612 |
sigaction (w->signum, &sa, 0); |
2613 |
#endif |
2614 |
} |
2615 |
|
2616 |
EV_FREQUENT_CHECK; |
2617 |
} |
2618 |
|
2619 |
void noinline |
2620 |
ev_signal_stop (EV_P_ ev_signal *w) |
2621 |
{ |
2622 |
clear_pending (EV_A_ (W)w); |
2623 |
if (expect_false (!ev_is_active (w))) |
2624 |
return; |
2625 |
|
2626 |
EV_FREQUENT_CHECK; |
2627 |
|
2628 |
wlist_del (&signals [w->signum - 1].head, (WL)w); |
2629 |
ev_stop (EV_A_ (W)w); |
2630 |
|
2631 |
if (!signals [w->signum - 1].head) |
2632 |
signal (w->signum, SIG_DFL); |
2633 |
|
2634 |
EV_FREQUENT_CHECK; |
2635 |
} |
2636 |
|
2637 |
void |
2638 |
ev_child_start (EV_P_ ev_child *w) |
2639 |
{ |
2640 |
#if EV_MULTIPLICITY |
2641 |
assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
2642 |
#endif |
2643 |
if (expect_false (ev_is_active (w))) |
2644 |
return; |
2645 |
|
2646 |
EV_FREQUENT_CHECK; |
2647 |
|
2648 |
ev_start (EV_A_ (W)w, 1); |
2649 |
wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
2650 |
|
2651 |
EV_FREQUENT_CHECK; |
2652 |
} |
2653 |
|
2654 |
void |
2655 |
ev_child_stop (EV_P_ ev_child *w) |
2656 |
{ |
2657 |
clear_pending (EV_A_ (W)w); |
2658 |
if (expect_false (!ev_is_active (w))) |
2659 |
return; |
2660 |
|
2661 |
EV_FREQUENT_CHECK; |
2662 |
|
2663 |
wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
2664 |
ev_stop (EV_A_ (W)w); |
2665 |
|
2666 |
EV_FREQUENT_CHECK; |
2667 |
} |
2668 |
|
2669 |
#if EV_STAT_ENABLE |
2670 |
|
2671 |
# ifdef _WIN32 |
2672 |
# undef lstat |
2673 |
# define lstat(a,b) _stati64 (a,b) |
2674 |
# endif |
2675 |
|
2676 |
#define DEF_STAT_INTERVAL 5.0074891 |
2677 |
#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ |
2678 |
#define MIN_STAT_INTERVAL 0.1074891 |
2679 |
|
2680 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2681 |
|
2682 |
#if EV_USE_INOTIFY |
2683 |
# define EV_INOTIFY_BUFSIZE 8192 |
2684 |
|
2685 |
static void noinline |
2686 |
infy_add (EV_P_ ev_stat *w) |
2687 |
{ |
2688 |
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); |
2689 |
|
2690 |
if (w->wd < 0) |
2691 |
{ |
2692 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2693 |
ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
2694 |
|
2695 |
/* monitor some parent directory for speedup hints */ |
2696 |
/* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2697 |
/* but an efficiency issue only */ |
2698 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2699 |
{ |
2700 |
char path [4096]; |
2701 |
strcpy (path, w->path); |
2702 |
|
2703 |
do |
2704 |
{ |
2705 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
2706 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
2707 |
|
2708 |
char *pend = strrchr (path, '/'); |
2709 |
|
2710 |
if (!pend || pend == path) |
2711 |
break; |
2712 |
|
2713 |
*pend = 0; |
2714 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
2715 |
} |
2716 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2717 |
} |
2718 |
} |
2719 |
|
2720 |
if (w->wd >= 0) |
2721 |
{ |
2722 |
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2723 |
|
2724 |
/* now local changes will be tracked by inotify, but remote changes won't */ |
2725 |
/* unless the filesystem it known to be local, we therefore still poll */ |
2726 |
/* also do poll on <2.6.25, but with normal frequency */ |
2727 |
struct statfs sfs; |
2728 |
|
2729 |
if (fs_2625 && !statfs (w->path, &sfs)) |
2730 |
if (sfs.f_type == 0x1373 /* devfs */ |
2731 |
|| sfs.f_type == 0xEF53 /* ext2/3 */ |
2732 |
|| sfs.f_type == 0x3153464a /* jfs */ |
2733 |
|| sfs.f_type == 0x52654973 /* reiser3 */ |
2734 |
|| sfs.f_type == 0x01021994 /* tempfs */ |
2735 |
|| sfs.f_type == 0x58465342 /* xfs */) |
2736 |
return; |
2737 |
|
2738 |
w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL; |
2739 |
ev_timer_again (EV_A_ &w->timer); |
2740 |
} |
2741 |
} |
2742 |
|
2743 |
static void noinline |
2744 |
infy_del (EV_P_ ev_stat *w) |
2745 |
{ |
2746 |
int slot; |
2747 |
int wd = w->wd; |
2748 |
|
2749 |
if (wd < 0) |
2750 |
return; |
2751 |
|
2752 |
w->wd = -2; |
2753 |
slot = wd & (EV_INOTIFY_HASHSIZE - 1); |
2754 |
wlist_del (&fs_hash [slot].head, (WL)w); |
2755 |
|
2756 |
/* remove this watcher, if others are watching it, they will rearm */ |
2757 |
inotify_rm_watch (fs_fd, wd); |
2758 |
} |
2759 |
|
2760 |
static void noinline |
2761 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
2762 |
{ |
2763 |
if (slot < 0) |
2764 |
/* overflow, need to check for all hash slots */ |
2765 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2766 |
infy_wd (EV_A_ slot, wd, ev); |
2767 |
else |
2768 |
{ |
2769 |
WL w_; |
2770 |
|
2771 |
for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) |
2772 |
{ |
2773 |
ev_stat *w = (ev_stat *)w_; |
2774 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
2775 |
|
2776 |
if (w->wd == wd || wd == -1) |
2777 |
{ |
2778 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
2779 |
{ |
2780 |
wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2781 |
w->wd = -1; |
2782 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2783 |
} |
2784 |
|
2785 |
stat_timer_cb (EV_A_ &w->timer, 0); |
2786 |
} |
2787 |
} |
2788 |
} |
2789 |
} |
2790 |
|
2791 |
static void |
2792 |
infy_cb (EV_P_ ev_io *w, int revents) |
2793 |
{ |
2794 |
char buf [EV_INOTIFY_BUFSIZE]; |
2795 |
struct inotify_event *ev = (struct inotify_event *)buf; |
2796 |
int ofs; |
2797 |
int len = read (fs_fd, buf, sizeof (buf)); |
2798 |
|
2799 |
for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
2800 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
2801 |
} |
2802 |
|
2803 |
inline_size void |
2804 |
check_2625 (EV_P) |
2805 |
{ |
2806 |
/* kernels < 2.6.25 are borked |
2807 |
* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
2808 |
*/ |
2809 |
struct utsname buf; |
2810 |
int major, minor, micro; |
2811 |
|
2812 |
if (uname (&buf)) |
2813 |
return; |
2814 |
|
2815 |
if (sscanf (buf.release, "%d.%d.%d", &major, &minor, µ) != 3) |
2816 |
return; |
2817 |
|
2818 |
if (major < 2 |
2819 |
|| (major == 2 && minor < 6) |
2820 |
|| (major == 2 && minor == 6 && micro < 25)) |
2821 |
return; |
2822 |
|
2823 |
fs_2625 = 1; |
2824 |
} |
2825 |
|
2826 |
inline_size void |
2827 |
infy_init (EV_P) |
2828 |
{ |
2829 |
if (fs_fd != -2) |
2830 |
return; |
2831 |
|
2832 |
fs_fd = -1; |
2833 |
|
2834 |
check_2625 (EV_A); |
2835 |
|
2836 |
fs_fd = inotify_init (); |
2837 |
|
2838 |
if (fs_fd >= 0) |
2839 |
{ |
2840 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2841 |
ev_set_priority (&fs_w, EV_MAXPRI); |
2842 |
ev_io_start (EV_A_ &fs_w); |
2843 |
} |
2844 |
} |
2845 |
|
2846 |
inline_size void |
2847 |
infy_fork (EV_P) |
2848 |
{ |
2849 |
int slot; |
2850 |
|
2851 |
if (fs_fd < 0) |
2852 |
return; |
2853 |
|
2854 |
close (fs_fd); |
2855 |
fs_fd = inotify_init (); |
2856 |
|
2857 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2858 |
{ |
2859 |
WL w_ = fs_hash [slot].head; |
2860 |
fs_hash [slot].head = 0; |
2861 |
|
2862 |
while (w_) |
2863 |
{ |
2864 |
ev_stat *w = (ev_stat *)w_; |
2865 |
w_ = w_->next; /* lets us add this watcher */ |
2866 |
|
2867 |
w->wd = -1; |
2868 |
|
2869 |
if (fs_fd >= 0) |
2870 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2871 |
else |
2872 |
ev_timer_again (EV_A_ &w->timer); |
2873 |
} |
2874 |
} |
2875 |
} |
2876 |
|
2877 |
#endif |
2878 |
|
2879 |
#ifdef _WIN32 |
2880 |
# define EV_LSTAT(p,b) _stati64 (p, b) |
2881 |
#else |
2882 |
# define EV_LSTAT(p,b) lstat (p, b) |
2883 |
#endif |
2884 |
|
2885 |
void |
2886 |
ev_stat_stat (EV_P_ ev_stat *w) |
2887 |
{ |
2888 |
if (lstat (w->path, &w->attr) < 0) |
2889 |
w->attr.st_nlink = 0; |
2890 |
else if (!w->attr.st_nlink) |
2891 |
w->attr.st_nlink = 1; |
2892 |
} |
2893 |
|
2894 |
static void noinline |
2895 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
2896 |
{ |
2897 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
2898 |
|
2899 |
/* we copy this here each the time so that */ |
2900 |
/* prev has the old value when the callback gets invoked */ |
2901 |
w->prev = w->attr; |
2902 |
ev_stat_stat (EV_A_ w); |
2903 |
|
2904 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
2905 |
if ( |
2906 |
w->prev.st_dev != w->attr.st_dev |
2907 |
|| w->prev.st_ino != w->attr.st_ino |
2908 |
|| w->prev.st_mode != w->attr.st_mode |
2909 |
|| w->prev.st_nlink != w->attr.st_nlink |
2910 |
|| w->prev.st_uid != w->attr.st_uid |
2911 |
|| w->prev.st_gid != w->attr.st_gid |
2912 |
|| w->prev.st_rdev != w->attr.st_rdev |
2913 |
|| w->prev.st_size != w->attr.st_size |
2914 |
|| w->prev.st_atime != w->attr.st_atime |
2915 |
|| w->prev.st_mtime != w->attr.st_mtime |
2916 |
|| w->prev.st_ctime != w->attr.st_ctime |
2917 |
) { |
2918 |
#if EV_USE_INOTIFY |
2919 |
if (fs_fd >= 0) |
2920 |
{ |
2921 |
infy_del (EV_A_ w); |
2922 |
infy_add (EV_A_ w); |
2923 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
2924 |
} |
2925 |
#endif |
2926 |
|
2927 |
ev_feed_event (EV_A_ w, EV_STAT); |
2928 |
} |
2929 |
} |
2930 |
|
2931 |
void |
2932 |
ev_stat_start (EV_P_ ev_stat *w) |
2933 |
{ |
2934 |
if (expect_false (ev_is_active (w))) |
2935 |
return; |
2936 |
|
2937 |
ev_stat_stat (EV_A_ w); |
2938 |
|
2939 |
if (w->interval < MIN_STAT_INTERVAL && w->interval) |
2940 |
w->interval = MIN_STAT_INTERVAL; |
2941 |
|
2942 |
ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); |
2943 |
ev_set_priority (&w->timer, ev_priority (w)); |
2944 |
|
2945 |
#if EV_USE_INOTIFY |
2946 |
infy_init (EV_A); |
2947 |
|
2948 |
if (fs_fd >= 0) |
2949 |
infy_add (EV_A_ w); |
2950 |
else |
2951 |
#endif |
2952 |
ev_timer_again (EV_A_ &w->timer); |
2953 |
|
2954 |
ev_start (EV_A_ (W)w, 1); |
2955 |
|
2956 |
EV_FREQUENT_CHECK; |
2957 |
} |
2958 |
|
2959 |
void |
2960 |
ev_stat_stop (EV_P_ ev_stat *w) |
2961 |
{ |
2962 |
clear_pending (EV_A_ (W)w); |
2963 |
if (expect_false (!ev_is_active (w))) |
2964 |
return; |
2965 |
|
2966 |
EV_FREQUENT_CHECK; |
2967 |
|
2968 |
#if EV_USE_INOTIFY |
2969 |
infy_del (EV_A_ w); |
2970 |
#endif |
2971 |
ev_timer_stop (EV_A_ &w->timer); |
2972 |
|
2973 |
ev_stop (EV_A_ (W)w); |
2974 |
|
2975 |
EV_FREQUENT_CHECK; |
2976 |
} |
2977 |
#endif |
2978 |
|
2979 |
#if EV_IDLE_ENABLE |
2980 |
void |
2981 |
ev_idle_start (EV_P_ ev_idle *w) |
2982 |
{ |
2983 |
if (expect_false (ev_is_active (w))) |
2984 |
return; |
2985 |
|
2986 |
pri_adjust (EV_A_ (W)w); |
2987 |
|
2988 |
EV_FREQUENT_CHECK; |
2989 |
|
2990 |
{ |
2991 |
int active = ++idlecnt [ABSPRI (w)]; |
2992 |
|
2993 |
++idleall; |
2994 |
ev_start (EV_A_ (W)w, active); |
2995 |
|
2996 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
2997 |
idles [ABSPRI (w)][active - 1] = w; |
2998 |
} |
2999 |
|
3000 |
EV_FREQUENT_CHECK; |
3001 |
} |
3002 |
|
3003 |
void |
3004 |
ev_idle_stop (EV_P_ ev_idle *w) |
3005 |
{ |
3006 |
clear_pending (EV_A_ (W)w); |
3007 |
if (expect_false (!ev_is_active (w))) |
3008 |
return; |
3009 |
|
3010 |
EV_FREQUENT_CHECK; |
3011 |
|
3012 |
{ |
3013 |
int active = ev_active (w); |
3014 |
|
3015 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
3016 |
ev_active (idles [ABSPRI (w)][active - 1]) = active; |
3017 |
|
3018 |
ev_stop (EV_A_ (W)w); |
3019 |
--idleall; |
3020 |
} |
3021 |
|
3022 |
EV_FREQUENT_CHECK; |
3023 |
} |
3024 |
#endif |
3025 |
|
3026 |
void |
3027 |
ev_prepare_start (EV_P_ ev_prepare *w) |
3028 |
{ |
3029 |
if (expect_false (ev_is_active (w))) |
3030 |
return; |
3031 |
|
3032 |
EV_FREQUENT_CHECK; |
3033 |
|
3034 |
ev_start (EV_A_ (W)w, ++preparecnt); |
3035 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
3036 |
prepares [preparecnt - 1] = w; |
3037 |
|
3038 |
EV_FREQUENT_CHECK; |
3039 |
} |
3040 |
|
3041 |
void |
3042 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
3043 |
{ |
3044 |
clear_pending (EV_A_ (W)w); |
3045 |
if (expect_false (!ev_is_active (w))) |
3046 |
return; |
3047 |
|
3048 |
EV_FREQUENT_CHECK; |
3049 |
|
3050 |
{ |
3051 |
int active = ev_active (w); |
3052 |
|
3053 |
prepares [active - 1] = prepares [--preparecnt]; |
3054 |
ev_active (prepares [active - 1]) = active; |
3055 |
} |
3056 |
|
3057 |
ev_stop (EV_A_ (W)w); |
3058 |
|
3059 |
EV_FREQUENT_CHECK; |
3060 |
} |
3061 |
|
3062 |
void |
3063 |
ev_check_start (EV_P_ ev_check *w) |
3064 |
{ |
3065 |
if (expect_false (ev_is_active (w))) |
3066 |
return; |
3067 |
|
3068 |
EV_FREQUENT_CHECK; |
3069 |
|
3070 |
ev_start (EV_A_ (W)w, ++checkcnt); |
3071 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
3072 |
checks [checkcnt - 1] = w; |
3073 |
|
3074 |
EV_FREQUENT_CHECK; |
3075 |
} |
3076 |
|
3077 |
void |
3078 |
ev_check_stop (EV_P_ ev_check *w) |
3079 |
{ |
3080 |
clear_pending (EV_A_ (W)w); |
3081 |
if (expect_false (!ev_is_active (w))) |
3082 |
return; |
3083 |
|
3084 |
EV_FREQUENT_CHECK; |
3085 |
|
3086 |
{ |
3087 |
int active = ev_active (w); |
3088 |
|
3089 |
checks [active - 1] = checks [--checkcnt]; |
3090 |
ev_active (checks [active - 1]) = active; |
3091 |
} |
3092 |
|
3093 |
ev_stop (EV_A_ (W)w); |
3094 |
|
3095 |
EV_FREQUENT_CHECK; |
3096 |
} |
3097 |
|
3098 |
#if EV_EMBED_ENABLE |
3099 |
void noinline |
3100 |
ev_embed_sweep (EV_P_ ev_embed *w) |
3101 |
{ |
3102 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
3103 |
} |
3104 |
|
3105 |
static void |
3106 |
embed_io_cb (EV_P_ ev_io *io, int revents) |
3107 |
{ |
3108 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
3109 |
|
3110 |
if (ev_cb (w)) |
3111 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
3112 |
else |
3113 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
3114 |
} |
3115 |
|
3116 |
static void |
3117 |
embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
3118 |
{ |
3119 |
ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
3120 |
|
3121 |
{ |
3122 |
struct ev_loop *loop = w->other; |
3123 |
|
3124 |
while (fdchangecnt) |
3125 |
{ |
3126 |
fd_reify (EV_A); |
3127 |
ev_loop (EV_A_ EVLOOP_NONBLOCK); |
3128 |
} |
3129 |
} |
3130 |
} |
3131 |
|
3132 |
static void |
3133 |
embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) |
3134 |
{ |
3135 |
ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); |
3136 |
|
3137 |
ev_embed_stop (EV_A_ w); |
3138 |
|
3139 |
{ |
3140 |
struct ev_loop *loop = w->other; |
3141 |
|
3142 |
ev_loop_fork (EV_A); |
3143 |
ev_loop (EV_A_ EVLOOP_NONBLOCK); |
3144 |
} |
3145 |
|
3146 |
ev_embed_start (EV_A_ w); |
3147 |
} |
3148 |
|
3149 |
#if 0 |
3150 |
static void |
3151 |
embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
3152 |
{ |
3153 |
ev_idle_stop (EV_A_ idle); |
3154 |
} |
3155 |
#endif |
3156 |
|
3157 |
void |
3158 |
ev_embed_start (EV_P_ ev_embed *w) |
3159 |
{ |
3160 |
if (expect_false (ev_is_active (w))) |
3161 |
return; |
3162 |
|
3163 |
{ |
3164 |
struct ev_loop *loop = w->other; |
3165 |
assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
3166 |
ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
3167 |
} |
3168 |
|
3169 |
EV_FREQUENT_CHECK; |
3170 |
|
3171 |
ev_set_priority (&w->io, ev_priority (w)); |
3172 |
ev_io_start (EV_A_ &w->io); |
3173 |
|
3174 |
ev_prepare_init (&w->prepare, embed_prepare_cb); |
3175 |
ev_set_priority (&w->prepare, EV_MINPRI); |
3176 |
ev_prepare_start (EV_A_ &w->prepare); |
3177 |
|
3178 |
ev_fork_init (&w->fork, embed_fork_cb); |
3179 |
ev_fork_start (EV_A_ &w->fork); |
3180 |
|
3181 |
/*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
3182 |
|
3183 |
ev_start (EV_A_ (W)w, 1); |
3184 |
|
3185 |
EV_FREQUENT_CHECK; |
3186 |
} |
3187 |
|
3188 |
void |
3189 |
ev_embed_stop (EV_P_ ev_embed *w) |
3190 |
{ |
3191 |
clear_pending (EV_A_ (W)w); |
3192 |
if (expect_false (!ev_is_active (w))) |
3193 |
return; |
3194 |
|
3195 |
EV_FREQUENT_CHECK; |
3196 |
|
3197 |
ev_io_stop (EV_A_ &w->io); |
3198 |
ev_prepare_stop (EV_A_ &w->prepare); |
3199 |
ev_fork_stop (EV_A_ &w->fork); |
3200 |
|
3201 |
EV_FREQUENT_CHECK; |
3202 |
} |
3203 |
#endif |
3204 |
|
3205 |
#if EV_FORK_ENABLE |
3206 |
void |
3207 |
ev_fork_start (EV_P_ ev_fork *w) |
3208 |
{ |
3209 |
if (expect_false (ev_is_active (w))) |
3210 |
return; |
3211 |
|
3212 |
EV_FREQUENT_CHECK; |
3213 |
|
3214 |
ev_start (EV_A_ (W)w, ++forkcnt); |
3215 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
3216 |
forks [forkcnt - 1] = w; |
3217 |
|
3218 |
EV_FREQUENT_CHECK; |
3219 |
} |
3220 |
|
3221 |
void |
3222 |
ev_fork_stop (EV_P_ ev_fork *w) |
3223 |
{ |
3224 |
clear_pending (EV_A_ (W)w); |
3225 |
if (expect_false (!ev_is_active (w))) |
3226 |
return; |
3227 |
|
3228 |
EV_FREQUENT_CHECK; |
3229 |
|
3230 |
{ |
3231 |
int active = ev_active (w); |
3232 |
|
3233 |
forks [active - 1] = forks [--forkcnt]; |
3234 |
ev_active (forks [active - 1]) = active; |
3235 |
} |
3236 |
|
3237 |
ev_stop (EV_A_ (W)w); |
3238 |
|
3239 |
EV_FREQUENT_CHECK; |
3240 |
} |
3241 |
#endif |
3242 |
|
3243 |
#if EV_ASYNC_ENABLE |
3244 |
void |
3245 |
ev_async_start (EV_P_ ev_async *w) |
3246 |
{ |
3247 |
if (expect_false (ev_is_active (w))) |
3248 |
return; |
3249 |
|
3250 |
evpipe_init (EV_A); |
3251 |
|
3252 |
EV_FREQUENT_CHECK; |
3253 |
|
3254 |
ev_start (EV_A_ (W)w, ++asynccnt); |
3255 |
array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
3256 |
asyncs [asynccnt - 1] = w; |
3257 |
|
3258 |
EV_FREQUENT_CHECK; |
3259 |
} |
3260 |
|
3261 |
void |
3262 |
ev_async_stop (EV_P_ ev_async *w) |
3263 |
{ |
3264 |
clear_pending (EV_A_ (W)w); |
3265 |
if (expect_false (!ev_is_active (w))) |
3266 |
return; |
3267 |
|
3268 |
EV_FREQUENT_CHECK; |
3269 |
|
3270 |
{ |
3271 |
int active = ev_active (w); |
3272 |
|
3273 |
asyncs [active - 1] = asyncs [--asynccnt]; |
3274 |
ev_active (asyncs [active - 1]) = active; |
3275 |
} |
3276 |
|
3277 |
ev_stop (EV_A_ (W)w); |
3278 |
|
3279 |
EV_FREQUENT_CHECK; |
3280 |
} |
3281 |
|
3282 |
void |
3283 |
ev_async_send (EV_P_ ev_async *w) |
3284 |
{ |
3285 |
w->sent = 1; |
3286 |
evpipe_write (EV_A_ &gotasync); |
3287 |
} |
3288 |
#endif |
3289 |
|
3290 |
/*****************************************************************************/ |
3291 |
|
3292 |
struct ev_once |
3293 |
{ |
3294 |
ev_io io; |
3295 |
ev_timer to; |
3296 |
void (*cb)(int revents, void *arg); |
3297 |
void *arg; |
3298 |
}; |
3299 |
|
3300 |
static void |
3301 |
once_cb (EV_P_ struct ev_once *once, int revents) |
3302 |
{ |
3303 |
void (*cb)(int revents, void *arg) = once->cb; |
3304 |
void *arg = once->arg; |
3305 |
|
3306 |
ev_io_stop (EV_A_ &once->io); |
3307 |
ev_timer_stop (EV_A_ &once->to); |
3308 |
ev_free (once); |
3309 |
|
3310 |
cb (revents, arg); |
3311 |
} |
3312 |
|
3313 |
static void |
3314 |
once_cb_io (EV_P_ ev_io *w, int revents) |
3315 |
{ |
3316 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); |
3317 |
|
3318 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); |
3319 |
} |
3320 |
|
3321 |
static void |
3322 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
3323 |
{ |
3324 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); |
3325 |
|
3326 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); |
3327 |
} |
3328 |
|
3329 |
void |
3330 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
3331 |
{ |
3332 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
3333 |
|
3334 |
if (expect_false (!once)) |
3335 |
{ |
3336 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
3337 |
return; |
3338 |
} |
3339 |
|
3340 |
once->cb = cb; |
3341 |
once->arg = arg; |
3342 |
|
3343 |
ev_init (&once->io, once_cb_io); |
3344 |
if (fd >= 0) |
3345 |
{ |
3346 |
ev_io_set (&once->io, fd, events); |
3347 |
ev_io_start (EV_A_ &once->io); |
3348 |
} |
3349 |
|
3350 |
ev_init (&once->to, once_cb_to); |
3351 |
if (timeout >= 0.) |
3352 |
{ |
3353 |
ev_timer_set (&once->to, timeout, 0.); |
3354 |
ev_timer_start (EV_A_ &once->to); |
3355 |
} |
3356 |
} |
3357 |
|
3358 |
/*****************************************************************************/ |
3359 |
|
3360 |
#if EV_WALK_ENABLE |
3361 |
void |
3362 |
ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) |
3363 |
{ |
3364 |
int i, j; |
3365 |
ev_watcher_list *wl, *wn; |
3366 |
|
3367 |
if (types & (EV_IO | EV_EMBED)) |
3368 |
for (i = 0; i < anfdmax; ++i) |
3369 |
for (wl = anfds [i].head; wl; ) |
3370 |
{ |
3371 |
wn = wl->next; |
3372 |
|
3373 |
#if EV_EMBED_ENABLE |
3374 |
if (ev_cb ((ev_io *)wl) == embed_io_cb) |
3375 |
{ |
3376 |
if (types & EV_EMBED) |
3377 |
cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); |
3378 |
} |
3379 |
else |
3380 |
#endif |
3381 |
#if EV_USE_INOTIFY |
3382 |
if (ev_cb ((ev_io *)wl) == infy_cb) |
3383 |
; |
3384 |
else |
3385 |
#endif |
3386 |
if ((ev_io *)wl != &pipe_w) |
3387 |
if (types & EV_IO) |
3388 |
cb (EV_A_ EV_IO, wl); |
3389 |
|
3390 |
wl = wn; |
3391 |
} |
3392 |
|
3393 |
if (types & (EV_TIMER | EV_STAT)) |
3394 |
for (i = timercnt + HEAP0; i-- > HEAP0; ) |
3395 |
#if EV_STAT_ENABLE |
3396 |
/*TODO: timer is not always active*/ |
3397 |
if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) |
3398 |
{ |
3399 |
if (types & EV_STAT) |
3400 |
cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); |
3401 |
} |
3402 |
else |
3403 |
#endif |
3404 |
if (types & EV_TIMER) |
3405 |
cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); |
3406 |
|
3407 |
#if EV_PERIODIC_ENABLE |
3408 |
if (types & EV_PERIODIC) |
3409 |
for (i = periodiccnt + HEAP0; i-- > HEAP0; ) |
3410 |
cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); |
3411 |
#endif |
3412 |
|
3413 |
#if EV_IDLE_ENABLE |
3414 |
if (types & EV_IDLE) |
3415 |
for (j = NUMPRI; i--; ) |
3416 |
for (i = idlecnt [j]; i--; ) |
3417 |
cb (EV_A_ EV_IDLE, idles [j][i]); |
3418 |
#endif |
3419 |
|
3420 |
#if EV_FORK_ENABLE |
3421 |
if (types & EV_FORK) |
3422 |
for (i = forkcnt; i--; ) |
3423 |
if (ev_cb (forks [i]) != embed_fork_cb) |
3424 |
cb (EV_A_ EV_FORK, forks [i]); |
3425 |
#endif |
3426 |
|
3427 |
#if EV_ASYNC_ENABLE |
3428 |
if (types & EV_ASYNC) |
3429 |
for (i = asynccnt; i--; ) |
3430 |
cb (EV_A_ EV_ASYNC, asyncs [i]); |
3431 |
#endif |
3432 |
|
3433 |
if (types & EV_PREPARE) |
3434 |
for (i = preparecnt; i--; ) |
3435 |
#if EV_EMBED_ENABLE |
3436 |
if (ev_cb (prepares [i]) != embed_prepare_cb) |
3437 |
#endif |
3438 |
cb (EV_A_ EV_PREPARE, prepares [i]); |
3439 |
|
3440 |
if (types & EV_CHECK) |
3441 |
for (i = checkcnt; i--; ) |
3442 |
cb (EV_A_ EV_CHECK, checks [i]); |
3443 |
|
3444 |
if (types & EV_SIGNAL) |
3445 |
for (i = 0; i < signalmax; ++i) |
3446 |
for (wl = signals [i].head; wl; ) |
3447 |
{ |
3448 |
wn = wl->next; |
3449 |
cb (EV_A_ EV_SIGNAL, wl); |
3450 |
wl = wn; |
3451 |
} |
3452 |
|
3453 |
if (types & EV_CHILD) |
3454 |
for (i = EV_PID_HASHSIZE; i--; ) |
3455 |
for (wl = childs [i]; wl; ) |
3456 |
{ |
3457 |
wn = wl->next; |
3458 |
cb (EV_A_ EV_CHILD, wl); |
3459 |
wl = wn; |
3460 |
} |
3461 |
/* EV_STAT 0x00001000 /* stat data changed */ |
3462 |
/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
3463 |
} |
3464 |
#endif |
3465 |
|
3466 |
#if EV_MULTIPLICITY |
3467 |
#include "ev_wrap.h" |
3468 |
#endif |
3469 |
|
3470 |
#ifdef __cplusplus |
3471 |
} |
3472 |
#endif |
3473 |
|