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/* |
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* libev event processing core, watcher management |
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* |
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* Copyright (c) 2007,2008,2009,2010,2011 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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/* 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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# if HAVE_NANOSLEEP |
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# ifndef EV_USE_NANOSLEEP |
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# define EV_USE_NANOSLEEP EV_FEATURE_OS |
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# endif |
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# else |
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# undef EV_USE_NANOSLEEP |
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# define EV_USE_NANOSLEEP 0 |
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# endif |
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|
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# if HAVE_SELECT && HAVE_SYS_SELECT_H |
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# ifndef EV_USE_SELECT |
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# define EV_USE_SELECT EV_FEATURE_BACKENDS |
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# endif |
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# else |
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# undef EV_USE_SELECT |
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# define EV_USE_SELECT 0 |
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# endif |
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|
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# if HAVE_POLL && HAVE_POLL_H |
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# ifndef EV_USE_POLL |
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# define EV_USE_POLL EV_FEATURE_BACKENDS |
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# endif |
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# else |
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# undef EV_USE_POLL |
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# define EV_USE_POLL 0 |
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# endif |
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|
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# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H |
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# ifndef EV_USE_EPOLL |
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# define EV_USE_EPOLL EV_FEATURE_BACKENDS |
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# endif |
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# else |
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# undef EV_USE_EPOLL |
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# define EV_USE_EPOLL 0 |
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# endif |
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|
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# if HAVE_KQUEUE && HAVE_SYS_EVENT_H |
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# ifndef EV_USE_KQUEUE |
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# define EV_USE_KQUEUE EV_FEATURE_BACKENDS |
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# endif |
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# else |
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# undef 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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# if HAVE_PORT_H && HAVE_PORT_CREATE |
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# ifndef EV_USE_PORT |
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# define EV_USE_PORT EV_FEATURE_BACKENDS |
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# endif |
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# else |
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# undef 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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# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H |
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# ifndef EV_USE_INOTIFY |
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# define EV_USE_INOTIFY EV_FEATURE_OS |
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# endif |
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# else |
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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 HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H |
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# ifndef EV_USE_SIGNALFD |
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# define EV_USE_SIGNALFD EV_FEATURE_OS |
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# endif |
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# else |
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# undef EV_USE_SIGNALFD |
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# define EV_USE_SIGNALFD 0 |
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# endif |
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|
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# if HAVE_EVENTFD |
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# ifndef EV_USE_EVENTFD |
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# define EV_USE_EVENTFD EV_FEATURE_OS |
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# endif |
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# else |
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# undef EV_USE_EVENTFD |
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# define EV_USE_EVENTFD 0 |
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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 <string.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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#include <limits.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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EV_CPP(extern "C" {) |
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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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# undef EV_AVOID_STDIO |
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#endif |
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|
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/* OS X, in its infinite idiocy, actually HARDCODES |
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* a limit of 1024 into their select. Where people have brains, |
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* OS X engineers apparently have a vacuum. Or maybe they were |
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* ordered to have a vacuum, or they do anything for money. |
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* This might help. Or not. |
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*/ |
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#define _DARWIN_UNLIMITED_SELECT 1 |
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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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/* try to deduce the maximum number of signals on this platform */ |
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#if defined (EV_NSIG) |
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/* use what's provided */ |
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#elif defined (NSIG) |
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# define EV_NSIG (NSIG) |
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#elif defined(_NSIG) |
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# define EV_NSIG (_NSIG) |
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#elif defined (SIGMAX) |
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# define EV_NSIG (SIGMAX+1) |
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#elif defined (SIG_MAX) |
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# define EV_NSIG (SIG_MAX+1) |
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#elif defined (_SIG_MAX) |
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# define EV_NSIG (_SIG_MAX+1) |
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#elif defined (MAXSIG) |
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# define EV_NSIG (MAXSIG+1) |
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#elif defined (MAX_SIG) |
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# define EV_NSIG (MAX_SIG+1) |
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#elif defined (SIGARRAYSIZE) |
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# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ |
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#elif defined (_sys_nsig) |
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# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ |
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#else |
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# error "unable to find value for NSIG, please report" |
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/* to make it compile regardless, just remove the above line, */ |
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/* but consider reporting it, too! :) */ |
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# define EV_NSIG 65 |
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#endif |
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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 EV_FEATURE_OS |
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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 EV_FEATURE_OS |
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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 EV_FEATURE_OS |
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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 EV_FEATURE_BACKENDS |
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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 EV_FEATURE_BACKENDS |
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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 EV_FEATURE_BACKENDS |
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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 EV_FEATURE_OS |
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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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# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1 |
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#endif |
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|
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#ifndef EV_INOTIFY_HASHSIZE |
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# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1 |
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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 EV_FEATURE_OS |
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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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#ifndef EV_USE_SIGNALFD |
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# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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# define EV_USE_SIGNALFD EV_FEATURE_OS |
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# else |
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# define EV_USE_SIGNALFD 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_FEATURE_API ? 1 : 0) |
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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_FEATURE_DATA |
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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_FEATURE_DATA |
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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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#ifdef _AIX |
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/* AIX has a completely broken poll.h header */ |
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# undef EV_USE_POLL |
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# define EV_USE_POLL 0 |
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#endif |
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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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/* hp-ux has it in sys/time.h, which we unconditionally include above */ |
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# if !defined(_WIN32) && !defined(__hpux) |
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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/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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# ifndef EFD_NONBLOCK |
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# define EFD_NONBLOCK O_NONBLOCK |
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# endif |
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# ifndef EFD_CLOEXEC |
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# ifdef O_CLOEXEC |
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# define EFD_CLOEXEC O_CLOEXEC |
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# else |
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# define EFD_CLOEXEC 02000000 |
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# endif |
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# endif |
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EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); |
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#endif |
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|
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#if EV_USE_SIGNALFD |
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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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# ifndef SFD_NONBLOCK |
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# define SFD_NONBLOCK O_NONBLOCK |
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# endif |
423 |
# ifndef SFD_CLOEXEC |
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# ifdef O_CLOEXEC |
425 |
# define SFD_CLOEXEC O_CLOEXEC |
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# else |
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# define SFD_CLOEXEC 02000000 |
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# endif |
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# endif |
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EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); |
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|
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struct signalfd_siginfo |
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{ |
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uint32_t ssi_signo; |
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char pad[128 - sizeof (uint32_t)]; |
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}; |
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#endif |
438 |
|
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/**/ |
440 |
|
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#if EV_VERIFY >= 3 |
442 |
# define EV_FREQUENT_CHECK ev_verify (EV_A) |
443 |
#else |
444 |
# define EV_FREQUENT_CHECK do { } while (0) |
445 |
#endif |
446 |
|
447 |
/* |
448 |
* This is used to avoid floating point rounding problems. |
449 |
* It is added to ev_rt_now when scheduling periodics |
450 |
* to ensure progress, time-wise, even when rounding |
451 |
* errors are against us. |
452 |
* This value is good at least till the year 4000. |
453 |
* Better solutions welcome. |
454 |
*/ |
455 |
#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
456 |
|
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#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
458 |
#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
459 |
|
460 |
#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) |
461 |
#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) |
462 |
|
463 |
#if __GNUC__ >= 4 |
464 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
465 |
# define noinline __attribute__ ((noinline)) |
466 |
#else |
467 |
# define expect(expr,value) (expr) |
468 |
# define noinline |
469 |
# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 |
470 |
# define inline |
471 |
# endif |
472 |
#endif |
473 |
|
474 |
#define expect_false(expr) expect ((expr) != 0, 0) |
475 |
#define expect_true(expr) expect ((expr) != 0, 1) |
476 |
#define inline_size static inline |
477 |
|
478 |
#if EV_FEATURE_CODE |
479 |
# define inline_speed static inline |
480 |
#else |
481 |
# define inline_speed static noinline |
482 |
#endif |
483 |
|
484 |
#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
485 |
|
486 |
#if EV_MINPRI == EV_MAXPRI |
487 |
# define ABSPRI(w) (((W)w), 0) |
488 |
#else |
489 |
# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
490 |
#endif |
491 |
|
492 |
#define EMPTY /* required for microsofts broken pseudo-c compiler */ |
493 |
#define EMPTY2(a,b) /* used to suppress some warnings */ |
494 |
|
495 |
typedef ev_watcher *W; |
496 |
typedef ev_watcher_list *WL; |
497 |
typedef ev_watcher_time *WT; |
498 |
|
499 |
#define ev_active(w) ((W)(w))->active |
500 |
#define ev_at(w) ((WT)(w))->at |
501 |
|
502 |
#if EV_USE_REALTIME |
503 |
/* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
504 |
/* giving it a reasonably high chance of working on typical architectures */ |
505 |
static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
506 |
#endif |
507 |
|
508 |
#if EV_USE_MONOTONIC |
509 |
static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
510 |
#endif |
511 |
|
512 |
#ifndef EV_FD_TO_WIN32_HANDLE |
513 |
# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
514 |
#endif |
515 |
#ifndef EV_WIN32_HANDLE_TO_FD |
516 |
# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
517 |
#endif |
518 |
#ifndef EV_WIN32_CLOSE_FD |
519 |
# define EV_WIN32_CLOSE_FD(fd) close (fd) |
520 |
#endif |
521 |
|
522 |
#ifdef _WIN32 |
523 |
# include "ev_win32.c" |
524 |
#endif |
525 |
|
526 |
/*****************************************************************************/ |
527 |
|
528 |
#ifdef __linux |
529 |
# include <sys/utsname.h> |
530 |
#endif |
531 |
|
532 |
static unsigned int noinline |
533 |
ev_linux_version (void) |
534 |
{ |
535 |
#ifdef __linux |
536 |
unsigned int v = 0; |
537 |
struct utsname buf; |
538 |
int i; |
539 |
char *p = buf.release; |
540 |
|
541 |
if (uname (&buf)) |
542 |
return 0; |
543 |
|
544 |
for (i = 3+1; --i; ) |
545 |
{ |
546 |
unsigned int c = 0; |
547 |
|
548 |
for (;;) |
549 |
{ |
550 |
if (*p >= '0' && *p <= '9') |
551 |
c = c * 10 + *p++ - '0'; |
552 |
else |
553 |
{ |
554 |
p += *p == '.'; |
555 |
break; |
556 |
} |
557 |
} |
558 |
|
559 |
v = (v << 8) | c; |
560 |
} |
561 |
|
562 |
return v; |
563 |
#else |
564 |
return 0; |
565 |
#endif |
566 |
} |
567 |
|
568 |
/*****************************************************************************/ |
569 |
|
570 |
#if EV_AVOID_STDIO |
571 |
static void noinline |
572 |
ev_printerr (const char *msg) |
573 |
{ |
574 |
write (STDERR_FILENO, msg, strlen (msg)); |
575 |
} |
576 |
#endif |
577 |
|
578 |
static void (*syserr_cb)(const char *msg); |
579 |
|
580 |
void |
581 |
ev_set_syserr_cb (void (*cb)(const char *msg)) |
582 |
{ |
583 |
syserr_cb = cb; |
584 |
} |
585 |
|
586 |
static void noinline |
587 |
ev_syserr (const char *msg) |
588 |
{ |
589 |
if (!msg) |
590 |
msg = "(libev) system error"; |
591 |
|
592 |
if (syserr_cb) |
593 |
syserr_cb (msg); |
594 |
else |
595 |
{ |
596 |
#if EV_AVOID_STDIO |
597 |
ev_printerr (msg); |
598 |
ev_printerr (": "); |
599 |
ev_printerr (strerror (errno)); |
600 |
ev_printerr ("\n"); |
601 |
#else |
602 |
perror (msg); |
603 |
#endif |
604 |
abort (); |
605 |
} |
606 |
} |
607 |
|
608 |
static void * |
609 |
ev_realloc_emul (void *ptr, long size) |
610 |
{ |
611 |
#if __GLIBC__ |
612 |
return realloc (ptr, size); |
613 |
#else |
614 |
/* some systems, notably openbsd and darwin, fail to properly |
615 |
* implement realloc (x, 0) (as required by both ansi c-89 and |
616 |
* the single unix specification, so work around them here. |
617 |
*/ |
618 |
|
619 |
if (size) |
620 |
return realloc (ptr, size); |
621 |
|
622 |
free (ptr); |
623 |
return 0; |
624 |
#endif |
625 |
} |
626 |
|
627 |
static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; |
628 |
|
629 |
void |
630 |
ev_set_allocator (void *(*cb)(void *ptr, long size)) |
631 |
{ |
632 |
alloc = cb; |
633 |
} |
634 |
|
635 |
inline_speed void * |
636 |
ev_realloc (void *ptr, long size) |
637 |
{ |
638 |
ptr = alloc (ptr, size); |
639 |
|
640 |
if (!ptr && size) |
641 |
{ |
642 |
#if EV_AVOID_STDIO |
643 |
ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
644 |
#else |
645 |
fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
646 |
#endif |
647 |
abort (); |
648 |
} |
649 |
|
650 |
return ptr; |
651 |
} |
652 |
|
653 |
#define ev_malloc(size) ev_realloc (0, (size)) |
654 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
655 |
|
656 |
/*****************************************************************************/ |
657 |
|
658 |
/* set in reify when reification needed */ |
659 |
#define EV_ANFD_REIFY 1 |
660 |
|
661 |
/* file descriptor info structure */ |
662 |
typedef struct |
663 |
{ |
664 |
WL head; |
665 |
unsigned char events; /* the events watched for */ |
666 |
unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ |
667 |
unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ |
668 |
unsigned char unused; |
669 |
#if EV_USE_EPOLL |
670 |
unsigned int egen; /* generation counter to counter epoll bugs */ |
671 |
#endif |
672 |
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
673 |
SOCKET handle; |
674 |
#endif |
675 |
#if EV_USE_IOCP |
676 |
OVERLAPPED or, ow; |
677 |
#endif |
678 |
} ANFD; |
679 |
|
680 |
/* stores the pending event set for a given watcher */ |
681 |
typedef struct |
682 |
{ |
683 |
W w; |
684 |
int events; /* the pending event set for the given watcher */ |
685 |
} ANPENDING; |
686 |
|
687 |
#if EV_USE_INOTIFY |
688 |
/* hash table entry per inotify-id */ |
689 |
typedef struct |
690 |
{ |
691 |
WL head; |
692 |
} ANFS; |
693 |
#endif |
694 |
|
695 |
/* Heap Entry */ |
696 |
#if EV_HEAP_CACHE_AT |
697 |
/* a heap element */ |
698 |
typedef struct { |
699 |
ev_tstamp at; |
700 |
WT w; |
701 |
} ANHE; |
702 |
|
703 |
#define ANHE_w(he) (he).w /* access watcher, read-write */ |
704 |
#define ANHE_at(he) (he).at /* access cached at, read-only */ |
705 |
#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ |
706 |
#else |
707 |
/* a heap element */ |
708 |
typedef WT ANHE; |
709 |
|
710 |
#define ANHE_w(he) (he) |
711 |
#define ANHE_at(he) (he)->at |
712 |
#define ANHE_at_cache(he) |
713 |
#endif |
714 |
|
715 |
#if EV_MULTIPLICITY |
716 |
|
717 |
struct ev_loop |
718 |
{ |
719 |
ev_tstamp ev_rt_now; |
720 |
#define ev_rt_now ((loop)->ev_rt_now) |
721 |
#define VAR(name,decl) decl; |
722 |
#include "ev_vars.h" |
723 |
#undef VAR |
724 |
}; |
725 |
#include "ev_wrap.h" |
726 |
|
727 |
static struct ev_loop default_loop_struct; |
728 |
struct ev_loop *ev_default_loop_ptr; |
729 |
|
730 |
#else |
731 |
|
732 |
ev_tstamp ev_rt_now; |
733 |
#define VAR(name,decl) static decl; |
734 |
#include "ev_vars.h" |
735 |
#undef VAR |
736 |
|
737 |
static int ev_default_loop_ptr; |
738 |
|
739 |
#endif |
740 |
|
741 |
#if EV_FEATURE_API |
742 |
# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) |
743 |
# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) |
744 |
# define EV_INVOKE_PENDING invoke_cb (EV_A) |
745 |
#else |
746 |
# define EV_RELEASE_CB (void)0 |
747 |
# define EV_ACQUIRE_CB (void)0 |
748 |
# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) |
749 |
#endif |
750 |
|
751 |
#define EVBREAK_RECURSE 0x80 |
752 |
|
753 |
/*****************************************************************************/ |
754 |
|
755 |
#ifndef EV_HAVE_EV_TIME |
756 |
ev_tstamp |
757 |
ev_time (void) |
758 |
{ |
759 |
#if EV_USE_REALTIME |
760 |
if (expect_true (have_realtime)) |
761 |
{ |
762 |
struct timespec ts; |
763 |
clock_gettime (CLOCK_REALTIME, &ts); |
764 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
765 |
} |
766 |
#endif |
767 |
|
768 |
struct timeval tv; |
769 |
gettimeofday (&tv, 0); |
770 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
771 |
} |
772 |
#endif |
773 |
|
774 |
inline_size ev_tstamp |
775 |
get_clock (void) |
776 |
{ |
777 |
#if EV_USE_MONOTONIC |
778 |
if (expect_true (have_monotonic)) |
779 |
{ |
780 |
struct timespec ts; |
781 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
782 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
783 |
} |
784 |
#endif |
785 |
|
786 |
return ev_time (); |
787 |
} |
788 |
|
789 |
#if EV_MULTIPLICITY |
790 |
ev_tstamp |
791 |
ev_now (EV_P) |
792 |
{ |
793 |
return ev_rt_now; |
794 |
} |
795 |
#endif |
796 |
|
797 |
void |
798 |
ev_sleep (ev_tstamp delay) |
799 |
{ |
800 |
if (delay > 0.) |
801 |
{ |
802 |
#if EV_USE_NANOSLEEP |
803 |
struct timespec ts; |
804 |
|
805 |
EV_TS_SET (ts, delay); |
806 |
nanosleep (&ts, 0); |
807 |
#elif defined(_WIN32) |
808 |
Sleep ((unsigned long)(delay * 1e3)); |
809 |
#else |
810 |
struct timeval tv; |
811 |
|
812 |
/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ |
813 |
/* something not guaranteed by newer posix versions, but guaranteed */ |
814 |
/* by older ones */ |
815 |
EV_TV_SET (tv, delay); |
816 |
select (0, 0, 0, 0, &tv); |
817 |
#endif |
818 |
} |
819 |
} |
820 |
|
821 |
inline_speed int |
822 |
ev_timeout_to_ms (ev_tstamp timeout) |
823 |
{ |
824 |
int ms = timeout * 1000. + .999999; |
825 |
|
826 |
return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1; |
827 |
} |
828 |
|
829 |
/*****************************************************************************/ |
830 |
|
831 |
#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
832 |
|
833 |
/* find a suitable new size for the given array, */ |
834 |
/* hopefully by rounding to a nice-to-malloc size */ |
835 |
inline_size int |
836 |
array_nextsize (int elem, int cur, int cnt) |
837 |
{ |
838 |
int ncur = cur + 1; |
839 |
|
840 |
do |
841 |
ncur <<= 1; |
842 |
while (cnt > ncur); |
843 |
|
844 |
/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ |
845 |
if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) |
846 |
{ |
847 |
ncur *= elem; |
848 |
ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); |
849 |
ncur = ncur - sizeof (void *) * 4; |
850 |
ncur /= elem; |
851 |
} |
852 |
|
853 |
return ncur; |
854 |
} |
855 |
|
856 |
static noinline void * |
857 |
array_realloc (int elem, void *base, int *cur, int cnt) |
858 |
{ |
859 |
*cur = array_nextsize (elem, *cur, cnt); |
860 |
return ev_realloc (base, elem * *cur); |
861 |
} |
862 |
|
863 |
#define array_init_zero(base,count) \ |
864 |
memset ((void *)(base), 0, sizeof (*(base)) * (count)) |
865 |
|
866 |
#define array_needsize(type,base,cur,cnt,init) \ |
867 |
if (expect_false ((cnt) > (cur))) \ |
868 |
{ \ |
869 |
int ocur_ = (cur); \ |
870 |
(base) = (type *)array_realloc \ |
871 |
(sizeof (type), (base), &(cur), (cnt)); \ |
872 |
init ((base) + (ocur_), (cur) - ocur_); \ |
873 |
} |
874 |
|
875 |
#if 0 |
876 |
#define array_slim(type,stem) \ |
877 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
878 |
{ \ |
879 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
880 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
881 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
882 |
} |
883 |
#endif |
884 |
|
885 |
#define array_free(stem, idx) \ |
886 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 |
887 |
|
888 |
/*****************************************************************************/ |
889 |
|
890 |
/* dummy callback for pending events */ |
891 |
static void noinline |
892 |
pendingcb (EV_P_ ev_prepare *w, int revents) |
893 |
{ |
894 |
} |
895 |
|
896 |
void noinline |
897 |
ev_feed_event (EV_P_ void *w, int revents) |
898 |
{ |
899 |
W w_ = (W)w; |
900 |
int pri = ABSPRI (w_); |
901 |
|
902 |
if (expect_false (w_->pending)) |
903 |
pendings [pri][w_->pending - 1].events |= revents; |
904 |
else |
905 |
{ |
906 |
w_->pending = ++pendingcnt [pri]; |
907 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
908 |
pendings [pri][w_->pending - 1].w = w_; |
909 |
pendings [pri][w_->pending - 1].events = revents; |
910 |
} |
911 |
} |
912 |
|
913 |
inline_speed void |
914 |
feed_reverse (EV_P_ W w) |
915 |
{ |
916 |
array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); |
917 |
rfeeds [rfeedcnt++] = w; |
918 |
} |
919 |
|
920 |
inline_size void |
921 |
feed_reverse_done (EV_P_ int revents) |
922 |
{ |
923 |
do |
924 |
ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); |
925 |
while (rfeedcnt); |
926 |
} |
927 |
|
928 |
inline_speed void |
929 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
930 |
{ |
931 |
int i; |
932 |
|
933 |
for (i = 0; i < eventcnt; ++i) |
934 |
ev_feed_event (EV_A_ events [i], type); |
935 |
} |
936 |
|
937 |
/*****************************************************************************/ |
938 |
|
939 |
inline_speed void |
940 |
fd_event_nocheck (EV_P_ int fd, int revents) |
941 |
{ |
942 |
ANFD *anfd = anfds + fd; |
943 |
ev_io *w; |
944 |
|
945 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
946 |
{ |
947 |
int ev = w->events & revents; |
948 |
|
949 |
if (ev) |
950 |
ev_feed_event (EV_A_ (W)w, ev); |
951 |
} |
952 |
} |
953 |
|
954 |
/* do not submit kernel events for fds that have reify set */ |
955 |
/* because that means they changed while we were polling for new events */ |
956 |
inline_speed void |
957 |
fd_event (EV_P_ int fd, int revents) |
958 |
{ |
959 |
ANFD *anfd = anfds + fd; |
960 |
|
961 |
if (expect_true (!anfd->reify)) |
962 |
fd_event_nocheck (EV_A_ fd, revents); |
963 |
} |
964 |
|
965 |
void |
966 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
967 |
{ |
968 |
if (fd >= 0 && fd < anfdmax) |
969 |
fd_event_nocheck (EV_A_ fd, revents); |
970 |
} |
971 |
|
972 |
/* make sure the external fd watch events are in-sync */ |
973 |
/* with the kernel/libev internal state */ |
974 |
inline_size void |
975 |
fd_reify (EV_P) |
976 |
{ |
977 |
int i; |
978 |
|
979 |
for (i = 0; i < fdchangecnt; ++i) |
980 |
{ |
981 |
int fd = fdchanges [i]; |
982 |
ANFD *anfd = anfds + fd; |
983 |
ev_io *w; |
984 |
|
985 |
unsigned char o_events = anfd->events; |
986 |
unsigned char o_reify = anfd->reify; |
987 |
|
988 |
anfd->reify = 0; |
989 |
|
990 |
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
991 |
if (o_reify & EV__IOFDSET) |
992 |
{ |
993 |
unsigned long arg; |
994 |
anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
995 |
assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
996 |
printf ("oi %d %x\n", fd, anfd->handle);//D |
997 |
} |
998 |
#endif |
999 |
|
1000 |
/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ |
1001 |
{ |
1002 |
anfd->events = 0; |
1003 |
|
1004 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
1005 |
anfd->events |= (unsigned char)w->events; |
1006 |
|
1007 |
if (o_events != anfd->events) |
1008 |
o_reify = EV__IOFDSET; /* actually |= */ |
1009 |
} |
1010 |
|
1011 |
if (o_reify & EV__IOFDSET) |
1012 |
backend_modify (EV_A_ fd, o_events, anfd->events); |
1013 |
} |
1014 |
|
1015 |
fdchangecnt = 0; |
1016 |
} |
1017 |
|
1018 |
/* something about the given fd changed */ |
1019 |
inline_size void |
1020 |
fd_change (EV_P_ int fd, int flags) |
1021 |
{ |
1022 |
unsigned char reify = anfds [fd].reify; |
1023 |
anfds [fd].reify |= flags; |
1024 |
|
1025 |
if (expect_true (!reify)) |
1026 |
{ |
1027 |
++fdchangecnt; |
1028 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
1029 |
fdchanges [fdchangecnt - 1] = fd; |
1030 |
} |
1031 |
} |
1032 |
|
1033 |
/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ |
1034 |
inline_speed void |
1035 |
fd_kill (EV_P_ int fd) |
1036 |
{ |
1037 |
ev_io *w; |
1038 |
|
1039 |
while ((w = (ev_io *)anfds [fd].head)) |
1040 |
{ |
1041 |
ev_io_stop (EV_A_ w); |
1042 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
1043 |
} |
1044 |
} |
1045 |
|
1046 |
/* check whether the given fd is actually valid, for error recovery */ |
1047 |
inline_size int |
1048 |
fd_valid (int fd) |
1049 |
{ |
1050 |
#ifdef _WIN32 |
1051 |
return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
1052 |
#else |
1053 |
return fcntl (fd, F_GETFD) != -1; |
1054 |
#endif |
1055 |
} |
1056 |
|
1057 |
/* called on EBADF to verify fds */ |
1058 |
static void noinline |
1059 |
fd_ebadf (EV_P) |
1060 |
{ |
1061 |
int fd; |
1062 |
|
1063 |
for (fd = 0; fd < anfdmax; ++fd) |
1064 |
if (anfds [fd].events) |
1065 |
if (!fd_valid (fd) && errno == EBADF) |
1066 |
fd_kill (EV_A_ fd); |
1067 |
} |
1068 |
|
1069 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
1070 |
static void noinline |
1071 |
fd_enomem (EV_P) |
1072 |
{ |
1073 |
int fd; |
1074 |
|
1075 |
for (fd = anfdmax; fd--; ) |
1076 |
if (anfds [fd].events) |
1077 |
{ |
1078 |
fd_kill (EV_A_ fd); |
1079 |
break; |
1080 |
} |
1081 |
} |
1082 |
|
1083 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
1084 |
static void noinline |
1085 |
fd_rearm_all (EV_P) |
1086 |
{ |
1087 |
int fd; |
1088 |
|
1089 |
for (fd = 0; fd < anfdmax; ++fd) |
1090 |
if (anfds [fd].events) |
1091 |
{ |
1092 |
anfds [fd].events = 0; |
1093 |
anfds [fd].emask = 0; |
1094 |
fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); |
1095 |
} |
1096 |
} |
1097 |
|
1098 |
/* used to prepare libev internal fd's */ |
1099 |
/* this is not fork-safe */ |
1100 |
inline_speed void |
1101 |
fd_intern (int fd) |
1102 |
{ |
1103 |
#ifdef _WIN32 |
1104 |
unsigned long arg = 1; |
1105 |
ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
1106 |
#else |
1107 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
1108 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
1109 |
#endif |
1110 |
} |
1111 |
|
1112 |
/*****************************************************************************/ |
1113 |
|
1114 |
/* |
1115 |
* the heap functions want a real array index. array index 0 is guaranteed to not |
1116 |
* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives |
1117 |
* the branching factor of the d-tree. |
1118 |
*/ |
1119 |
|
1120 |
/* |
1121 |
* at the moment we allow libev the luxury of two heaps, |
1122 |
* a small-code-size 2-heap one and a ~1.5kb larger 4-heap |
1123 |
* which is more cache-efficient. |
1124 |
* the difference is about 5% with 50000+ watchers. |
1125 |
*/ |
1126 |
#if EV_USE_4HEAP |
1127 |
|
1128 |
#define DHEAP 4 |
1129 |
#define HEAP0 (DHEAP - 1) /* index of first element in heap */ |
1130 |
#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) |
1131 |
#define UPHEAP_DONE(p,k) ((p) == (k)) |
1132 |
|
1133 |
/* away from the root */ |
1134 |
inline_speed void |
1135 |
downheap (ANHE *heap, int N, int k) |
1136 |
{ |
1137 |
ANHE he = heap [k]; |
1138 |
ANHE *E = heap + N + HEAP0; |
1139 |
|
1140 |
for (;;) |
1141 |
{ |
1142 |
ev_tstamp minat; |
1143 |
ANHE *minpos; |
1144 |
ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; |
1145 |
|
1146 |
/* find minimum child */ |
1147 |
if (expect_true (pos + DHEAP - 1 < E)) |
1148 |
{ |
1149 |
/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
1150 |
if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
1151 |
if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
1152 |
if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
1153 |
} |
1154 |
else if (pos < E) |
1155 |
{ |
1156 |
/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
1157 |
if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
1158 |
if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
1159 |
if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
1160 |
} |
1161 |
else |
1162 |
break; |
1163 |
|
1164 |
if (ANHE_at (he) <= minat) |
1165 |
break; |
1166 |
|
1167 |
heap [k] = *minpos; |
1168 |
ev_active (ANHE_w (*minpos)) = k; |
1169 |
|
1170 |
k = minpos - heap; |
1171 |
} |
1172 |
|
1173 |
heap [k] = he; |
1174 |
ev_active (ANHE_w (he)) = k; |
1175 |
} |
1176 |
|
1177 |
#else /* 4HEAP */ |
1178 |
|
1179 |
#define HEAP0 1 |
1180 |
#define HPARENT(k) ((k) >> 1) |
1181 |
#define UPHEAP_DONE(p,k) (!(p)) |
1182 |
|
1183 |
/* away from the root */ |
1184 |
inline_speed void |
1185 |
downheap (ANHE *heap, int N, int k) |
1186 |
{ |
1187 |
ANHE he = heap [k]; |
1188 |
|
1189 |
for (;;) |
1190 |
{ |
1191 |
int c = k << 1; |
1192 |
|
1193 |
if (c >= N + HEAP0) |
1194 |
break; |
1195 |
|
1196 |
c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) |
1197 |
? 1 : 0; |
1198 |
|
1199 |
if (ANHE_at (he) <= ANHE_at (heap [c])) |
1200 |
break; |
1201 |
|
1202 |
heap [k] = heap [c]; |
1203 |
ev_active (ANHE_w (heap [k])) = k; |
1204 |
|
1205 |
k = c; |
1206 |
} |
1207 |
|
1208 |
heap [k] = he; |
1209 |
ev_active (ANHE_w (he)) = k; |
1210 |
} |
1211 |
#endif |
1212 |
|
1213 |
/* towards the root */ |
1214 |
inline_speed void |
1215 |
upheap (ANHE *heap, int k) |
1216 |
{ |
1217 |
ANHE he = heap [k]; |
1218 |
|
1219 |
for (;;) |
1220 |
{ |
1221 |
int p = HPARENT (k); |
1222 |
|
1223 |
if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) |
1224 |
break; |
1225 |
|
1226 |
heap [k] = heap [p]; |
1227 |
ev_active (ANHE_w (heap [k])) = k; |
1228 |
k = p; |
1229 |
} |
1230 |
|
1231 |
heap [k] = he; |
1232 |
ev_active (ANHE_w (he)) = k; |
1233 |
} |
1234 |
|
1235 |
/* move an element suitably so it is in a correct place */ |
1236 |
inline_size void |
1237 |
adjustheap (ANHE *heap, int N, int k) |
1238 |
{ |
1239 |
if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) |
1240 |
upheap (heap, k); |
1241 |
else |
1242 |
downheap (heap, N, k); |
1243 |
} |
1244 |
|
1245 |
/* rebuild the heap: this function is used only once and executed rarely */ |
1246 |
inline_size void |
1247 |
reheap (ANHE *heap, int N) |
1248 |
{ |
1249 |
int i; |
1250 |
|
1251 |
/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ |
1252 |
/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ |
1253 |
for (i = 0; i < N; ++i) |
1254 |
upheap (heap, i + HEAP0); |
1255 |
} |
1256 |
|
1257 |
/*****************************************************************************/ |
1258 |
|
1259 |
/* associate signal watchers to a signal signal */ |
1260 |
typedef struct |
1261 |
{ |
1262 |
EV_ATOMIC_T pending; |
1263 |
#if EV_MULTIPLICITY |
1264 |
EV_P; |
1265 |
#endif |
1266 |
WL head; |
1267 |
} ANSIG; |
1268 |
|
1269 |
static ANSIG signals [EV_NSIG - 1]; |
1270 |
|
1271 |
/*****************************************************************************/ |
1272 |
|
1273 |
#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
1274 |
|
1275 |
static void noinline |
1276 |
evpipe_init (EV_P) |
1277 |
{ |
1278 |
if (!ev_is_active (&pipe_w)) |
1279 |
{ |
1280 |
# if EV_USE_EVENTFD |
1281 |
evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); |
1282 |
if (evfd < 0 && errno == EINVAL) |
1283 |
evfd = eventfd (0, 0); |
1284 |
|
1285 |
if (evfd >= 0) |
1286 |
{ |
1287 |
evpipe [0] = -1; |
1288 |
fd_intern (evfd); /* doing it twice doesn't hurt */ |
1289 |
ev_io_set (&pipe_w, evfd, EV_READ); |
1290 |
} |
1291 |
else |
1292 |
# endif |
1293 |
{ |
1294 |
while (pipe (evpipe)) |
1295 |
ev_syserr ("(libev) error creating signal/async pipe"); |
1296 |
|
1297 |
fd_intern (evpipe [0]); |
1298 |
fd_intern (evpipe [1]); |
1299 |
ev_io_set (&pipe_w, evpipe [0], EV_READ); |
1300 |
} |
1301 |
|
1302 |
ev_io_start (EV_A_ &pipe_w); |
1303 |
ev_unref (EV_A); /* watcher should not keep loop alive */ |
1304 |
} |
1305 |
} |
1306 |
|
1307 |
inline_size void |
1308 |
evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
1309 |
{ |
1310 |
if (!*flag) |
1311 |
{ |
1312 |
int old_errno = errno; /* save errno because write might clobber it */ |
1313 |
char dummy; |
1314 |
|
1315 |
*flag = 1; |
1316 |
|
1317 |
#if EV_USE_EVENTFD |
1318 |
if (evfd >= 0) |
1319 |
{ |
1320 |
uint64_t counter = 1; |
1321 |
write (evfd, &counter, sizeof (uint64_t)); |
1322 |
} |
1323 |
else |
1324 |
#endif |
1325 |
/* win32 people keep sending patches that change this write() to send() */ |
1326 |
/* and then run away. but send() is wrong, it wants a socket handle on win32 */ |
1327 |
/* so when you think this write should be a send instead, please find out */ |
1328 |
/* where your send() is from - it's definitely not the microsoft send, and */ |
1329 |
/* tell me. thank you. */ |
1330 |
write (evpipe [1], &dummy, 1); |
1331 |
|
1332 |
errno = old_errno; |
1333 |
} |
1334 |
} |
1335 |
|
1336 |
/* called whenever the libev signal pipe */ |
1337 |
/* got some events (signal, async) */ |
1338 |
static void |
1339 |
pipecb (EV_P_ ev_io *iow, int revents) |
1340 |
{ |
1341 |
int i; |
1342 |
|
1343 |
#if EV_USE_EVENTFD |
1344 |
if (evfd >= 0) |
1345 |
{ |
1346 |
uint64_t counter; |
1347 |
read (evfd, &counter, sizeof (uint64_t)); |
1348 |
} |
1349 |
else |
1350 |
#endif |
1351 |
{ |
1352 |
char dummy; |
1353 |
/* see discussion in evpipe_write when you think this read should be recv in win32 */ |
1354 |
read (evpipe [0], &dummy, 1); |
1355 |
} |
1356 |
|
1357 |
#if EV_SIGNAL_ENABLE |
1358 |
if (sig_pending) |
1359 |
{ |
1360 |
sig_pending = 0; |
1361 |
|
1362 |
for (i = EV_NSIG - 1; i--; ) |
1363 |
if (expect_false (signals [i].pending)) |
1364 |
ev_feed_signal_event (EV_A_ i + 1); |
1365 |
} |
1366 |
#endif |
1367 |
|
1368 |
#if EV_ASYNC_ENABLE |
1369 |
if (async_pending) |
1370 |
{ |
1371 |
async_pending = 0; |
1372 |
|
1373 |
for (i = asynccnt; i--; ) |
1374 |
if (asyncs [i]->sent) |
1375 |
{ |
1376 |
asyncs [i]->sent = 0; |
1377 |
ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
1378 |
} |
1379 |
} |
1380 |
#endif |
1381 |
} |
1382 |
|
1383 |
/*****************************************************************************/ |
1384 |
|
1385 |
void |
1386 |
ev_feed_signal (int signum) |
1387 |
{ |
1388 |
#if EV_MULTIPLICITY |
1389 |
EV_P = signals [signum - 1].loop; |
1390 |
|
1391 |
if (!EV_A) |
1392 |
return; |
1393 |
#endif |
1394 |
|
1395 |
signals [signum - 1].pending = 1; |
1396 |
evpipe_write (EV_A_ &sig_pending); |
1397 |
} |
1398 |
|
1399 |
static void |
1400 |
ev_sighandler (int signum) |
1401 |
{ |
1402 |
#ifdef _WIN32 |
1403 |
signal (signum, ev_sighandler); |
1404 |
#endif |
1405 |
|
1406 |
ev_feed_signal (signum); |
1407 |
} |
1408 |
|
1409 |
void noinline |
1410 |
ev_feed_signal_event (EV_P_ int signum) |
1411 |
{ |
1412 |
WL w; |
1413 |
|
1414 |
if (expect_false (signum <= 0 || signum > EV_NSIG)) |
1415 |
return; |
1416 |
|
1417 |
--signum; |
1418 |
|
1419 |
#if EV_MULTIPLICITY |
1420 |
/* it is permissible to try to feed a signal to the wrong loop */ |
1421 |
/* or, likely more useful, feeding a signal nobody is waiting for */ |
1422 |
|
1423 |
if (expect_false (signals [signum].loop != EV_A)) |
1424 |
return; |
1425 |
#endif |
1426 |
|
1427 |
signals [signum].pending = 0; |
1428 |
|
1429 |
for (w = signals [signum].head; w; w = w->next) |
1430 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
1431 |
} |
1432 |
|
1433 |
#if EV_USE_SIGNALFD |
1434 |
static void |
1435 |
sigfdcb (EV_P_ ev_io *iow, int revents) |
1436 |
{ |
1437 |
struct signalfd_siginfo si[2], *sip; /* these structs are big */ |
1438 |
|
1439 |
for (;;) |
1440 |
{ |
1441 |
ssize_t res = read (sigfd, si, sizeof (si)); |
1442 |
|
1443 |
/* not ISO-C, as res might be -1, but works with SuS */ |
1444 |
for (sip = si; (char *)sip < (char *)si + res; ++sip) |
1445 |
ev_feed_signal_event (EV_A_ sip->ssi_signo); |
1446 |
|
1447 |
if (res < (ssize_t)sizeof (si)) |
1448 |
break; |
1449 |
} |
1450 |
} |
1451 |
#endif |
1452 |
|
1453 |
#endif |
1454 |
|
1455 |
/*****************************************************************************/ |
1456 |
|
1457 |
#if EV_CHILD_ENABLE |
1458 |
static WL childs [EV_PID_HASHSIZE]; |
1459 |
|
1460 |
static ev_signal childev; |
1461 |
|
1462 |
#ifndef WIFCONTINUED |
1463 |
# define WIFCONTINUED(status) 0 |
1464 |
#endif |
1465 |
|
1466 |
/* handle a single child status event */ |
1467 |
inline_speed void |
1468 |
child_reap (EV_P_ int chain, int pid, int status) |
1469 |
{ |
1470 |
ev_child *w; |
1471 |
int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
1472 |
|
1473 |
for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
1474 |
{ |
1475 |
if ((w->pid == pid || !w->pid) |
1476 |
&& (!traced || (w->flags & 1))) |
1477 |
{ |
1478 |
ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ |
1479 |
w->rpid = pid; |
1480 |
w->rstatus = status; |
1481 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
1482 |
} |
1483 |
} |
1484 |
} |
1485 |
|
1486 |
#ifndef WCONTINUED |
1487 |
# define WCONTINUED 0 |
1488 |
#endif |
1489 |
|
1490 |
/* called on sigchld etc., calls waitpid */ |
1491 |
static void |
1492 |
childcb (EV_P_ ev_signal *sw, int revents) |
1493 |
{ |
1494 |
int pid, status; |
1495 |
|
1496 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
1497 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
1498 |
if (!WCONTINUED |
1499 |
|| errno != EINVAL |
1500 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
1501 |
return; |
1502 |
|
1503 |
/* make sure we are called again until all children have been reaped */ |
1504 |
/* we need to do it this way so that the callback gets called before we continue */ |
1505 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
1506 |
|
1507 |
child_reap (EV_A_ pid, pid, status); |
1508 |
if ((EV_PID_HASHSIZE) > 1) |
1509 |
child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
1510 |
} |
1511 |
|
1512 |
#endif |
1513 |
|
1514 |
/*****************************************************************************/ |
1515 |
|
1516 |
#if EV_USE_IOCP |
1517 |
# include "ev_iocp.c" |
1518 |
#endif |
1519 |
#if EV_USE_PORT |
1520 |
# include "ev_port.c" |
1521 |
#endif |
1522 |
#if EV_USE_KQUEUE |
1523 |
# include "ev_kqueue.c" |
1524 |
#endif |
1525 |
#if EV_USE_EPOLL |
1526 |
# include "ev_epoll.c" |
1527 |
#endif |
1528 |
#if EV_USE_POLL |
1529 |
# include "ev_poll.c" |
1530 |
#endif |
1531 |
#if EV_USE_SELECT |
1532 |
# include "ev_select.c" |
1533 |
#endif |
1534 |
|
1535 |
int |
1536 |
ev_version_major (void) |
1537 |
{ |
1538 |
return EV_VERSION_MAJOR; |
1539 |
} |
1540 |
|
1541 |
int |
1542 |
ev_version_minor (void) |
1543 |
{ |
1544 |
return EV_VERSION_MINOR; |
1545 |
} |
1546 |
|
1547 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
1548 |
int inline_size |
1549 |
enable_secure (void) |
1550 |
{ |
1551 |
#ifdef _WIN32 |
1552 |
return 0; |
1553 |
#else |
1554 |
return getuid () != geteuid () |
1555 |
|| getgid () != getegid (); |
1556 |
#endif |
1557 |
} |
1558 |
|
1559 |
unsigned int |
1560 |
ev_supported_backends (void) |
1561 |
{ |
1562 |
unsigned int flags = 0; |
1563 |
|
1564 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
1565 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
1566 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
1567 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
1568 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
1569 |
|
1570 |
return flags; |
1571 |
} |
1572 |
|
1573 |
unsigned int |
1574 |
ev_recommended_backends (void) |
1575 |
{ |
1576 |
unsigned int flags = ev_supported_backends (); |
1577 |
|
1578 |
#ifndef __NetBSD__ |
1579 |
/* kqueue is borked on everything but netbsd apparently */ |
1580 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
1581 |
flags &= ~EVBACKEND_KQUEUE; |
1582 |
#endif |
1583 |
#ifdef __APPLE__ |
1584 |
/* only select works correctly on that "unix-certified" platform */ |
1585 |
flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ |
1586 |
flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ |
1587 |
#endif |
1588 |
#ifdef __FreeBSD__ |
1589 |
flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ |
1590 |
#endif |
1591 |
|
1592 |
return flags; |
1593 |
} |
1594 |
|
1595 |
unsigned int |
1596 |
ev_embeddable_backends (void) |
1597 |
{ |
1598 |
int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
1599 |
|
1600 |
/* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
1601 |
if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ |
1602 |
flags &= ~EVBACKEND_EPOLL; |
1603 |
|
1604 |
return flags; |
1605 |
} |
1606 |
|
1607 |
unsigned int |
1608 |
ev_backend (EV_P) |
1609 |
{ |
1610 |
return backend; |
1611 |
} |
1612 |
|
1613 |
#if EV_FEATURE_API |
1614 |
unsigned int |
1615 |
ev_iteration (EV_P) |
1616 |
{ |
1617 |
return loop_count; |
1618 |
} |
1619 |
|
1620 |
unsigned int |
1621 |
ev_depth (EV_P) |
1622 |
{ |
1623 |
return loop_depth; |
1624 |
} |
1625 |
|
1626 |
void |
1627 |
ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
1628 |
{ |
1629 |
io_blocktime = interval; |
1630 |
} |
1631 |
|
1632 |
void |
1633 |
ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
1634 |
{ |
1635 |
timeout_blocktime = interval; |
1636 |
} |
1637 |
|
1638 |
void |
1639 |
ev_set_userdata (EV_P_ void *data) |
1640 |
{ |
1641 |
userdata = data; |
1642 |
} |
1643 |
|
1644 |
void * |
1645 |
ev_userdata (EV_P) |
1646 |
{ |
1647 |
return userdata; |
1648 |
} |
1649 |
|
1650 |
void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) |
1651 |
{ |
1652 |
invoke_cb = invoke_pending_cb; |
1653 |
} |
1654 |
|
1655 |
void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) |
1656 |
{ |
1657 |
release_cb = release; |
1658 |
acquire_cb = acquire; |
1659 |
} |
1660 |
#endif |
1661 |
|
1662 |
/* initialise a loop structure, must be zero-initialised */ |
1663 |
static void noinline |
1664 |
loop_init (EV_P_ unsigned int flags) |
1665 |
{ |
1666 |
if (!backend) |
1667 |
{ |
1668 |
origflags = flags; |
1669 |
|
1670 |
#if EV_USE_REALTIME |
1671 |
if (!have_realtime) |
1672 |
{ |
1673 |
struct timespec ts; |
1674 |
|
1675 |
if (!clock_gettime (CLOCK_REALTIME, &ts)) |
1676 |
have_realtime = 1; |
1677 |
} |
1678 |
#endif |
1679 |
|
1680 |
#if EV_USE_MONOTONIC |
1681 |
if (!have_monotonic) |
1682 |
{ |
1683 |
struct timespec ts; |
1684 |
|
1685 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
1686 |
have_monotonic = 1; |
1687 |
} |
1688 |
#endif |
1689 |
|
1690 |
/* pid check not overridable via env */ |
1691 |
#ifndef _WIN32 |
1692 |
if (flags & EVFLAG_FORKCHECK) |
1693 |
curpid = getpid (); |
1694 |
#endif |
1695 |
|
1696 |
if (!(flags & EVFLAG_NOENV) |
1697 |
&& !enable_secure () |
1698 |
&& getenv ("LIBEV_FLAGS")) |
1699 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
1700 |
|
1701 |
ev_rt_now = ev_time (); |
1702 |
mn_now = get_clock (); |
1703 |
now_floor = mn_now; |
1704 |
rtmn_diff = ev_rt_now - mn_now; |
1705 |
#if EV_FEATURE_API |
1706 |
invoke_cb = ev_invoke_pending; |
1707 |
#endif |
1708 |
|
1709 |
io_blocktime = 0.; |
1710 |
timeout_blocktime = 0.; |
1711 |
backend = 0; |
1712 |
backend_fd = -1; |
1713 |
sig_pending = 0; |
1714 |
#if EV_ASYNC_ENABLE |
1715 |
async_pending = 0; |
1716 |
#endif |
1717 |
#if EV_USE_INOTIFY |
1718 |
fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1719 |
#endif |
1720 |
#if EV_USE_SIGNALFD |
1721 |
sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1722 |
#endif |
1723 |
|
1724 |
if (!(flags & EVBACKEND_MASK)) |
1725 |
flags |= ev_recommended_backends (); |
1726 |
|
1727 |
#if EV_USE_IOCP |
1728 |
if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1729 |
#endif |
1730 |
#if EV_USE_PORT |
1731 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
1732 |
#endif |
1733 |
#if EV_USE_KQUEUE |
1734 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
1735 |
#endif |
1736 |
#if EV_USE_EPOLL |
1737 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
1738 |
#endif |
1739 |
#if EV_USE_POLL |
1740 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
1741 |
#endif |
1742 |
#if EV_USE_SELECT |
1743 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
1744 |
#endif |
1745 |
|
1746 |
ev_prepare_init (&pending_w, pendingcb); |
1747 |
|
1748 |
#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
1749 |
ev_init (&pipe_w, pipecb); |
1750 |
ev_set_priority (&pipe_w, EV_MAXPRI); |
1751 |
#endif |
1752 |
} |
1753 |
} |
1754 |
|
1755 |
/* free up a loop structure */ |
1756 |
void |
1757 |
ev_loop_destroy (EV_P) |
1758 |
{ |
1759 |
int i; |
1760 |
|
1761 |
#if EV_MULTIPLICITY |
1762 |
/* mimic free (0) */ |
1763 |
if (!EV_A) |
1764 |
return; |
1765 |
#endif |
1766 |
|
1767 |
#if EV_CLEANUP_ENABLE |
1768 |
/* queue cleanup watchers (and execute them) */ |
1769 |
if (expect_false (cleanupcnt)) |
1770 |
{ |
1771 |
queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); |
1772 |
EV_INVOKE_PENDING; |
1773 |
} |
1774 |
#endif |
1775 |
|
1776 |
#if EV_CHILD_ENABLE |
1777 |
if (ev_is_active (&childev)) |
1778 |
{ |
1779 |
ev_ref (EV_A); /* child watcher */ |
1780 |
ev_signal_stop (EV_A_ &childev); |
1781 |
} |
1782 |
#endif |
1783 |
|
1784 |
if (ev_is_active (&pipe_w)) |
1785 |
{ |
1786 |
/*ev_ref (EV_A);*/ |
1787 |
/*ev_io_stop (EV_A_ &pipe_w);*/ |
1788 |
|
1789 |
#if EV_USE_EVENTFD |
1790 |
if (evfd >= 0) |
1791 |
close (evfd); |
1792 |
#endif |
1793 |
|
1794 |
if (evpipe [0] >= 0) |
1795 |
{ |
1796 |
EV_WIN32_CLOSE_FD (evpipe [0]); |
1797 |
EV_WIN32_CLOSE_FD (evpipe [1]); |
1798 |
} |
1799 |
} |
1800 |
|
1801 |
#if EV_USE_SIGNALFD |
1802 |
if (ev_is_active (&sigfd_w)) |
1803 |
close (sigfd); |
1804 |
#endif |
1805 |
|
1806 |
#if EV_USE_INOTIFY |
1807 |
if (fs_fd >= 0) |
1808 |
close (fs_fd); |
1809 |
#endif |
1810 |
|
1811 |
if (backend_fd >= 0) |
1812 |
close (backend_fd); |
1813 |
|
1814 |
#if EV_USE_IOCP |
1815 |
if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); |
1816 |
#endif |
1817 |
#if EV_USE_PORT |
1818 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
1819 |
#endif |
1820 |
#if EV_USE_KQUEUE |
1821 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
1822 |
#endif |
1823 |
#if EV_USE_EPOLL |
1824 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1825 |
#endif |
1826 |
#if EV_USE_POLL |
1827 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1828 |
#endif |
1829 |
#if EV_USE_SELECT |
1830 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1831 |
#endif |
1832 |
|
1833 |
for (i = NUMPRI; i--; ) |
1834 |
{ |
1835 |
array_free (pending, [i]); |
1836 |
#if EV_IDLE_ENABLE |
1837 |
array_free (idle, [i]); |
1838 |
#endif |
1839 |
} |
1840 |
|
1841 |
ev_free (anfds); anfds = 0; anfdmax = 0; |
1842 |
|
1843 |
/* have to use the microsoft-never-gets-it-right macro */ |
1844 |
array_free (rfeed, EMPTY); |
1845 |
array_free (fdchange, EMPTY); |
1846 |
array_free (timer, EMPTY); |
1847 |
#if EV_PERIODIC_ENABLE |
1848 |
array_free (periodic, EMPTY); |
1849 |
#endif |
1850 |
#if EV_FORK_ENABLE |
1851 |
array_free (fork, EMPTY); |
1852 |
#endif |
1853 |
#if EV_CLEANUP_ENABLE |
1854 |
array_free (cleanup, EMPTY); |
1855 |
#endif |
1856 |
array_free (prepare, EMPTY); |
1857 |
array_free (check, EMPTY); |
1858 |
#if EV_ASYNC_ENABLE |
1859 |
array_free (async, EMPTY); |
1860 |
#endif |
1861 |
|
1862 |
backend = 0; |
1863 |
|
1864 |
#if EV_MULTIPLICITY |
1865 |
if (ev_is_default_loop (EV_A)) |
1866 |
#endif |
1867 |
ev_default_loop_ptr = 0; |
1868 |
#if EV_MULTIPLICITY |
1869 |
else |
1870 |
ev_free (EV_A); |
1871 |
#endif |
1872 |
} |
1873 |
|
1874 |
#if EV_USE_INOTIFY |
1875 |
inline_size void infy_fork (EV_P); |
1876 |
#endif |
1877 |
|
1878 |
inline_size void |
1879 |
loop_fork (EV_P) |
1880 |
{ |
1881 |
#if EV_USE_PORT |
1882 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1883 |
#endif |
1884 |
#if EV_USE_KQUEUE |
1885 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1886 |
#endif |
1887 |
#if EV_USE_EPOLL |
1888 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1889 |
#endif |
1890 |
#if EV_USE_INOTIFY |
1891 |
infy_fork (EV_A); |
1892 |
#endif |
1893 |
|
1894 |
if (ev_is_active (&pipe_w)) |
1895 |
{ |
1896 |
/* this "locks" the handlers against writing to the pipe */ |
1897 |
/* while we modify the fd vars */ |
1898 |
sig_pending = 1; |
1899 |
#if EV_ASYNC_ENABLE |
1900 |
async_pending = 1; |
1901 |
#endif |
1902 |
|
1903 |
ev_ref (EV_A); |
1904 |
ev_io_stop (EV_A_ &pipe_w); |
1905 |
|
1906 |
#if EV_USE_EVENTFD |
1907 |
if (evfd >= 0) |
1908 |
close (evfd); |
1909 |
#endif |
1910 |
|
1911 |
if (evpipe [0] >= 0) |
1912 |
{ |
1913 |
EV_WIN32_CLOSE_FD (evpipe [0]); |
1914 |
EV_WIN32_CLOSE_FD (evpipe [1]); |
1915 |
} |
1916 |
|
1917 |
#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
1918 |
evpipe_init (EV_A); |
1919 |
/* now iterate over everything, in case we missed something */ |
1920 |
pipecb (EV_A_ &pipe_w, EV_READ); |
1921 |
#endif |
1922 |
} |
1923 |
|
1924 |
postfork = 0; |
1925 |
} |
1926 |
|
1927 |
#if EV_MULTIPLICITY |
1928 |
|
1929 |
struct ev_loop * |
1930 |
ev_loop_new (unsigned int flags) |
1931 |
{ |
1932 |
EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1933 |
|
1934 |
memset (EV_A, 0, sizeof (struct ev_loop)); |
1935 |
loop_init (EV_A_ flags); |
1936 |
|
1937 |
if (ev_backend (EV_A)) |
1938 |
return EV_A; |
1939 |
|
1940 |
ev_free (EV_A); |
1941 |
return 0; |
1942 |
} |
1943 |
|
1944 |
#endif /* multiplicity */ |
1945 |
|
1946 |
#if EV_VERIFY |
1947 |
static void noinline |
1948 |
verify_watcher (EV_P_ W w) |
1949 |
{ |
1950 |
assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); |
1951 |
|
1952 |
if (w->pending) |
1953 |
assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); |
1954 |
} |
1955 |
|
1956 |
static void noinline |
1957 |
verify_heap (EV_P_ ANHE *heap, int N) |
1958 |
{ |
1959 |
int i; |
1960 |
|
1961 |
for (i = HEAP0; i < N + HEAP0; ++i) |
1962 |
{ |
1963 |
assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); |
1964 |
assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); |
1965 |
assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); |
1966 |
|
1967 |
verify_watcher (EV_A_ (W)ANHE_w (heap [i])); |
1968 |
} |
1969 |
} |
1970 |
|
1971 |
static void noinline |
1972 |
array_verify (EV_P_ W *ws, int cnt) |
1973 |
{ |
1974 |
while (cnt--) |
1975 |
{ |
1976 |
assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); |
1977 |
verify_watcher (EV_A_ ws [cnt]); |
1978 |
} |
1979 |
} |
1980 |
#endif |
1981 |
|
1982 |
#if EV_FEATURE_API |
1983 |
void |
1984 |
ev_verify (EV_P) |
1985 |
{ |
1986 |
#if EV_VERIFY |
1987 |
int i; |
1988 |
WL w; |
1989 |
|
1990 |
assert (activecnt >= -1); |
1991 |
|
1992 |
assert (fdchangemax >= fdchangecnt); |
1993 |
for (i = 0; i < fdchangecnt; ++i) |
1994 |
assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); |
1995 |
|
1996 |
assert (anfdmax >= 0); |
1997 |
for (i = 0; i < anfdmax; ++i) |
1998 |
for (w = anfds [i].head; w; w = w->next) |
1999 |
{ |
2000 |
verify_watcher (EV_A_ (W)w); |
2001 |
assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); |
2002 |
assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); |
2003 |
} |
2004 |
|
2005 |
assert (timermax >= timercnt); |
2006 |
verify_heap (EV_A_ timers, timercnt); |
2007 |
|
2008 |
#if EV_PERIODIC_ENABLE |
2009 |
assert (periodicmax >= periodiccnt); |
2010 |
verify_heap (EV_A_ periodics, periodiccnt); |
2011 |
#endif |
2012 |
|
2013 |
for (i = NUMPRI; i--; ) |
2014 |
{ |
2015 |
assert (pendingmax [i] >= pendingcnt [i]); |
2016 |
#if EV_IDLE_ENABLE |
2017 |
assert (idleall >= 0); |
2018 |
assert (idlemax [i] >= idlecnt [i]); |
2019 |
array_verify (EV_A_ (W *)idles [i], idlecnt [i]); |
2020 |
#endif |
2021 |
} |
2022 |
|
2023 |
#if EV_FORK_ENABLE |
2024 |
assert (forkmax >= forkcnt); |
2025 |
array_verify (EV_A_ (W *)forks, forkcnt); |
2026 |
#endif |
2027 |
|
2028 |
#if EV_CLEANUP_ENABLE |
2029 |
assert (cleanupmax >= cleanupcnt); |
2030 |
array_verify (EV_A_ (W *)cleanups, cleanupcnt); |
2031 |
#endif |
2032 |
|
2033 |
#if EV_ASYNC_ENABLE |
2034 |
assert (asyncmax >= asynccnt); |
2035 |
array_verify (EV_A_ (W *)asyncs, asynccnt); |
2036 |
#endif |
2037 |
|
2038 |
#if EV_PREPARE_ENABLE |
2039 |
assert (preparemax >= preparecnt); |
2040 |
array_verify (EV_A_ (W *)prepares, preparecnt); |
2041 |
#endif |
2042 |
|
2043 |
#if EV_CHECK_ENABLE |
2044 |
assert (checkmax >= checkcnt); |
2045 |
array_verify (EV_A_ (W *)checks, checkcnt); |
2046 |
#endif |
2047 |
|
2048 |
# if 0 |
2049 |
#if EV_CHILD_ENABLE |
2050 |
for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
2051 |
for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) |
2052 |
#endif |
2053 |
# endif |
2054 |
#endif |
2055 |
} |
2056 |
#endif |
2057 |
|
2058 |
#if EV_MULTIPLICITY |
2059 |
struct ev_loop * |
2060 |
#else |
2061 |
int |
2062 |
#endif |
2063 |
ev_default_loop (unsigned int flags) |
2064 |
{ |
2065 |
if (!ev_default_loop_ptr) |
2066 |
{ |
2067 |
#if EV_MULTIPLICITY |
2068 |
EV_P = ev_default_loop_ptr = &default_loop_struct; |
2069 |
#else |
2070 |
ev_default_loop_ptr = 1; |
2071 |
#endif |
2072 |
|
2073 |
loop_init (EV_A_ flags); |
2074 |
|
2075 |
if (ev_backend (EV_A)) |
2076 |
{ |
2077 |
#if EV_CHILD_ENABLE |
2078 |
ev_signal_init (&childev, childcb, SIGCHLD); |
2079 |
ev_set_priority (&childev, EV_MAXPRI); |
2080 |
ev_signal_start (EV_A_ &childev); |
2081 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
2082 |
#endif |
2083 |
} |
2084 |
else |
2085 |
ev_default_loop_ptr = 0; |
2086 |
} |
2087 |
|
2088 |
return ev_default_loop_ptr; |
2089 |
} |
2090 |
|
2091 |
void |
2092 |
ev_loop_fork (EV_P) |
2093 |
{ |
2094 |
postfork = 1; /* must be in line with ev_default_fork */ |
2095 |
} |
2096 |
|
2097 |
/*****************************************************************************/ |
2098 |
|
2099 |
void |
2100 |
ev_invoke (EV_P_ void *w, int revents) |
2101 |
{ |
2102 |
EV_CB_INVOKE ((W)w, revents); |
2103 |
} |
2104 |
|
2105 |
unsigned int |
2106 |
ev_pending_count (EV_P) |
2107 |
{ |
2108 |
int pri; |
2109 |
unsigned int count = 0; |
2110 |
|
2111 |
for (pri = NUMPRI; pri--; ) |
2112 |
count += pendingcnt [pri]; |
2113 |
|
2114 |
return count; |
2115 |
} |
2116 |
|
2117 |
void noinline |
2118 |
ev_invoke_pending (EV_P) |
2119 |
{ |
2120 |
int pri; |
2121 |
|
2122 |
for (pri = NUMPRI; pri--; ) |
2123 |
while (pendingcnt [pri]) |
2124 |
{ |
2125 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2126 |
|
2127 |
p->w->pending = 0; |
2128 |
EV_CB_INVOKE (p->w, p->events); |
2129 |
EV_FREQUENT_CHECK; |
2130 |
} |
2131 |
} |
2132 |
|
2133 |
#if EV_IDLE_ENABLE |
2134 |
/* make idle watchers pending. this handles the "call-idle */ |
2135 |
/* only when higher priorities are idle" logic */ |
2136 |
inline_size void |
2137 |
idle_reify (EV_P) |
2138 |
{ |
2139 |
if (expect_false (idleall)) |
2140 |
{ |
2141 |
int pri; |
2142 |
|
2143 |
for (pri = NUMPRI; pri--; ) |
2144 |
{ |
2145 |
if (pendingcnt [pri]) |
2146 |
break; |
2147 |
|
2148 |
if (idlecnt [pri]) |
2149 |
{ |
2150 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
2151 |
break; |
2152 |
} |
2153 |
} |
2154 |
} |
2155 |
} |
2156 |
#endif |
2157 |
|
2158 |
/* make timers pending */ |
2159 |
inline_size void |
2160 |
timers_reify (EV_P) |
2161 |
{ |
2162 |
EV_FREQUENT_CHECK; |
2163 |
|
2164 |
if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) |
2165 |
{ |
2166 |
do |
2167 |
{ |
2168 |
ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); |
2169 |
|
2170 |
/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ |
2171 |
|
2172 |
/* first reschedule or stop timer */ |
2173 |
if (w->repeat) |
2174 |
{ |
2175 |
ev_at (w) += w->repeat; |
2176 |
if (ev_at (w) < mn_now) |
2177 |
ev_at (w) = mn_now; |
2178 |
|
2179 |
assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
2180 |
|
2181 |
ANHE_at_cache (timers [HEAP0]); |
2182 |
downheap (timers, timercnt, HEAP0); |
2183 |
} |
2184 |
else |
2185 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
2186 |
|
2187 |
EV_FREQUENT_CHECK; |
2188 |
feed_reverse (EV_A_ (W)w); |
2189 |
} |
2190 |
while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); |
2191 |
|
2192 |
feed_reverse_done (EV_A_ EV_TIMER); |
2193 |
} |
2194 |
} |
2195 |
|
2196 |
#if EV_PERIODIC_ENABLE |
2197 |
|
2198 |
inline_speed |
2199 |
periodic_recalc (EV_P_ ev_periodic *w) |
2200 |
{ |
2201 |
/* TODO: use slow but potentially more correct incremental algo, */ |
2202 |
/* also do not rely on ceil */ |
2203 |
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2204 |
} |
2205 |
|
2206 |
/* make periodics pending */ |
2207 |
inline_size void |
2208 |
periodics_reify (EV_P) |
2209 |
{ |
2210 |
EV_FREQUENT_CHECK; |
2211 |
|
2212 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) |
2213 |
{ |
2214 |
int feed_count = 0; |
2215 |
|
2216 |
do |
2217 |
{ |
2218 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); |
2219 |
|
2220 |
/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ |
2221 |
|
2222 |
/* first reschedule or stop timer */ |
2223 |
if (w->reschedule_cb) |
2224 |
{ |
2225 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2226 |
|
2227 |
assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); |
2228 |
|
2229 |
ANHE_at_cache (periodics [HEAP0]); |
2230 |
downheap (periodics, periodiccnt, HEAP0); |
2231 |
} |
2232 |
else if (w->interval) |
2233 |
{ |
2234 |
periodic_recalc (EV_A_ w); |
2235 |
|
2236 |
/* if next trigger time is not sufficiently in the future, put it there */ |
2237 |
/* this might happen because of floating point inexactness */ |
2238 |
if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
2239 |
{ |
2240 |
ev_at (w) += w->interval; |
2241 |
|
2242 |
/* if interval is unreasonably low we might still have a time in the past */ |
2243 |
/* so correct this. this will make the periodic very inexact, but the user */ |
2244 |
/* has effectively asked to get triggered more often than possible */ |
2245 |
if (ev_at (w) < ev_rt_now) |
2246 |
ev_at (w) = ev_rt_now; |
2247 |
} |
2248 |
|
2249 |
ANHE_at_cache (periodics [HEAP0]); |
2250 |
downheap (periodics, periodiccnt, HEAP0); |
2251 |
} |
2252 |
else |
2253 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
2254 |
|
2255 |
EV_FREQUENT_CHECK; |
2256 |
feed_reverse (EV_A_ (W)w); |
2257 |
} |
2258 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); |
2259 |
|
2260 |
feed_reverse_done (EV_A_ EV_PERIODIC); |
2261 |
} |
2262 |
} |
2263 |
|
2264 |
/* simply recalculate all periodics */ |
2265 |
/* TODO: maybe ensure that at least one event happens when jumping forward? */ |
2266 |
static void noinline |
2267 |
periodics_reschedule (EV_P) |
2268 |
{ |
2269 |
int i; |
2270 |
|
2271 |
/* adjust periodics after time jump */ |
2272 |
for (i = HEAP0; i < periodiccnt + HEAP0; ++i) |
2273 |
{ |
2274 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
2275 |
|
2276 |
if (w->reschedule_cb) |
2277 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2278 |
else if (w->interval) |
2279 |
periodic_recalc (EV_A_ w); |
2280 |
|
2281 |
ANHE_at_cache (periodics [i]); |
2282 |
} |
2283 |
|
2284 |
reheap (periodics, periodiccnt); |
2285 |
} |
2286 |
#endif |
2287 |
|
2288 |
/* adjust all timers by a given offset */ |
2289 |
static void noinline |
2290 |
timers_reschedule (EV_P_ ev_tstamp adjust) |
2291 |
{ |
2292 |
int i; |
2293 |
|
2294 |
for (i = 0; i < timercnt; ++i) |
2295 |
{ |
2296 |
ANHE *he = timers + i + HEAP0; |
2297 |
ANHE_w (*he)->at += adjust; |
2298 |
ANHE_at_cache (*he); |
2299 |
} |
2300 |
} |
2301 |
|
2302 |
/* fetch new monotonic and realtime times from the kernel */ |
2303 |
/* also detect if there was a timejump, and act accordingly */ |
2304 |
inline_speed void |
2305 |
time_update (EV_P_ ev_tstamp max_block) |
2306 |
{ |
2307 |
#if EV_USE_MONOTONIC |
2308 |
if (expect_true (have_monotonic)) |
2309 |
{ |
2310 |
int i; |
2311 |
ev_tstamp odiff = rtmn_diff; |
2312 |
|
2313 |
mn_now = get_clock (); |
2314 |
|
2315 |
/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
2316 |
/* interpolate in the meantime */ |
2317 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
2318 |
{ |
2319 |
ev_rt_now = rtmn_diff + mn_now; |
2320 |
return; |
2321 |
} |
2322 |
|
2323 |
now_floor = mn_now; |
2324 |
ev_rt_now = ev_time (); |
2325 |
|
2326 |
/* loop a few times, before making important decisions. |
2327 |
* on the choice of "4": one iteration isn't enough, |
2328 |
* in case we get preempted during the calls to |
2329 |
* ev_time and get_clock. a second call is almost guaranteed |
2330 |
* to succeed in that case, though. and looping a few more times |
2331 |
* doesn't hurt either as we only do this on time-jumps or |
2332 |
* in the unlikely event of having been preempted here. |
2333 |
*/ |
2334 |
for (i = 4; --i; ) |
2335 |
{ |
2336 |
rtmn_diff = ev_rt_now - mn_now; |
2337 |
|
2338 |
if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) |
2339 |
return; /* all is well */ |
2340 |
|
2341 |
ev_rt_now = ev_time (); |
2342 |
mn_now = get_clock (); |
2343 |
now_floor = mn_now; |
2344 |
} |
2345 |
|
2346 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
2347 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
2348 |
# if EV_PERIODIC_ENABLE |
2349 |
periodics_reschedule (EV_A); |
2350 |
# endif |
2351 |
} |
2352 |
else |
2353 |
#endif |
2354 |
{ |
2355 |
ev_rt_now = ev_time (); |
2356 |
|
2357 |
if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
2358 |
{ |
2359 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
2360 |
timers_reschedule (EV_A_ ev_rt_now - mn_now); |
2361 |
#if EV_PERIODIC_ENABLE |
2362 |
periodics_reschedule (EV_A); |
2363 |
#endif |
2364 |
} |
2365 |
|
2366 |
mn_now = ev_rt_now; |
2367 |
} |
2368 |
} |
2369 |
|
2370 |
void |
2371 |
ev_run (EV_P_ int flags) |
2372 |
{ |
2373 |
#if EV_FEATURE_API |
2374 |
++loop_depth; |
2375 |
#endif |
2376 |
|
2377 |
assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); |
2378 |
|
2379 |
loop_done = EVBREAK_CANCEL; |
2380 |
|
2381 |
EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ |
2382 |
|
2383 |
do |
2384 |
{ |
2385 |
#if EV_VERIFY >= 2 |
2386 |
ev_verify (EV_A); |
2387 |
#endif |
2388 |
|
2389 |
#ifndef _WIN32 |
2390 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
2391 |
if (expect_false (getpid () != curpid)) |
2392 |
{ |
2393 |
curpid = getpid (); |
2394 |
postfork = 1; |
2395 |
} |
2396 |
#endif |
2397 |
|
2398 |
#if EV_FORK_ENABLE |
2399 |
/* we might have forked, so queue fork handlers */ |
2400 |
if (expect_false (postfork)) |
2401 |
if (forkcnt) |
2402 |
{ |
2403 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
2404 |
EV_INVOKE_PENDING; |
2405 |
} |
2406 |
#endif |
2407 |
|
2408 |
#if EV_PREPARE_ENABLE |
2409 |
/* queue prepare watchers (and execute them) */ |
2410 |
if (expect_false (preparecnt)) |
2411 |
{ |
2412 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
2413 |
EV_INVOKE_PENDING; |
2414 |
} |
2415 |
#endif |
2416 |
|
2417 |
if (expect_false (loop_done)) |
2418 |
break; |
2419 |
|
2420 |
/* we might have forked, so reify kernel state if necessary */ |
2421 |
if (expect_false (postfork)) |
2422 |
loop_fork (EV_A); |
2423 |
|
2424 |
/* update fd-related kernel structures */ |
2425 |
fd_reify (EV_A); |
2426 |
|
2427 |
/* calculate blocking time */ |
2428 |
{ |
2429 |
ev_tstamp waittime = 0.; |
2430 |
ev_tstamp sleeptime = 0.; |
2431 |
|
2432 |
/* remember old timestamp for io_blocktime calculation */ |
2433 |
ev_tstamp prev_mn_now = mn_now; |
2434 |
|
2435 |
/* update time to cancel out callback processing overhead */ |
2436 |
time_update (EV_A_ 1e100); |
2437 |
|
2438 |
if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) |
2439 |
{ |
2440 |
waittime = MAX_BLOCKTIME; |
2441 |
|
2442 |
if (timercnt) |
2443 |
{ |
2444 |
ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; |
2445 |
if (waittime > to) waittime = to; |
2446 |
} |
2447 |
|
2448 |
#if EV_PERIODIC_ENABLE |
2449 |
if (periodiccnt) |
2450 |
{ |
2451 |
ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; |
2452 |
if (waittime > to) waittime = to; |
2453 |
} |
2454 |
#endif |
2455 |
|
2456 |
/* don't let timeouts decrease the waittime below timeout_blocktime */ |
2457 |
if (expect_false (waittime < timeout_blocktime)) |
2458 |
waittime = timeout_blocktime; |
2459 |
|
2460 |
/* extra check because io_blocktime is commonly 0 */ |
2461 |
if (expect_false (io_blocktime)) |
2462 |
{ |
2463 |
sleeptime = io_blocktime - (mn_now - prev_mn_now); |
2464 |
|
2465 |
if (sleeptime > waittime - backend_fudge) |
2466 |
sleeptime = waittime - backend_fudge; |
2467 |
|
2468 |
if (expect_true (sleeptime > 0.)) |
2469 |
{ |
2470 |
ev_sleep (sleeptime); |
2471 |
waittime -= sleeptime; |
2472 |
} |
2473 |
} |
2474 |
} |
2475 |
|
2476 |
#if EV_FEATURE_API |
2477 |
++loop_count; |
2478 |
#endif |
2479 |
assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ |
2480 |
backend_poll (EV_A_ waittime); |
2481 |
assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ |
2482 |
|
2483 |
/* update ev_rt_now, do magic */ |
2484 |
time_update (EV_A_ waittime + sleeptime); |
2485 |
} |
2486 |
|
2487 |
/* queue pending timers and reschedule them */ |
2488 |
timers_reify (EV_A); /* relative timers called last */ |
2489 |
#if EV_PERIODIC_ENABLE |
2490 |
periodics_reify (EV_A); /* absolute timers called first */ |
2491 |
#endif |
2492 |
|
2493 |
#if EV_IDLE_ENABLE |
2494 |
/* queue idle watchers unless other events are pending */ |
2495 |
idle_reify (EV_A); |
2496 |
#endif |
2497 |
|
2498 |
#if EV_CHECK_ENABLE |
2499 |
/* queue check watchers, to be executed first */ |
2500 |
if (expect_false (checkcnt)) |
2501 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
2502 |
#endif |
2503 |
|
2504 |
EV_INVOKE_PENDING; |
2505 |
} |
2506 |
while (expect_true ( |
2507 |
activecnt |
2508 |
&& !loop_done |
2509 |
&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) |
2510 |
)); |
2511 |
|
2512 |
if (loop_done == EVBREAK_ONE) |
2513 |
loop_done = EVBREAK_CANCEL; |
2514 |
|
2515 |
#if EV_FEATURE_API |
2516 |
--loop_depth; |
2517 |
#endif |
2518 |
} |
2519 |
|
2520 |
void |
2521 |
ev_break (EV_P_ int how) |
2522 |
{ |
2523 |
loop_done = how; |
2524 |
} |
2525 |
|
2526 |
void |
2527 |
ev_ref (EV_P) |
2528 |
{ |
2529 |
++activecnt; |
2530 |
} |
2531 |
|
2532 |
void |
2533 |
ev_unref (EV_P) |
2534 |
{ |
2535 |
--activecnt; |
2536 |
} |
2537 |
|
2538 |
void |
2539 |
ev_now_update (EV_P) |
2540 |
{ |
2541 |
time_update (EV_A_ 1e100); |
2542 |
} |
2543 |
|
2544 |
void |
2545 |
ev_suspend (EV_P) |
2546 |
{ |
2547 |
ev_now_update (EV_A); |
2548 |
} |
2549 |
|
2550 |
void |
2551 |
ev_resume (EV_P) |
2552 |
{ |
2553 |
ev_tstamp mn_prev = mn_now; |
2554 |
|
2555 |
ev_now_update (EV_A); |
2556 |
timers_reschedule (EV_A_ mn_now - mn_prev); |
2557 |
#if EV_PERIODIC_ENABLE |
2558 |
/* TODO: really do this? */ |
2559 |
periodics_reschedule (EV_A); |
2560 |
#endif |
2561 |
} |
2562 |
|
2563 |
/*****************************************************************************/ |
2564 |
/* singly-linked list management, used when the expected list length is short */ |
2565 |
|
2566 |
inline_size void |
2567 |
wlist_add (WL *head, WL elem) |
2568 |
{ |
2569 |
elem->next = *head; |
2570 |
*head = elem; |
2571 |
} |
2572 |
|
2573 |
inline_size void |
2574 |
wlist_del (WL *head, WL elem) |
2575 |
{ |
2576 |
while (*head) |
2577 |
{ |
2578 |
if (expect_true (*head == elem)) |
2579 |
{ |
2580 |
*head = elem->next; |
2581 |
break; |
2582 |
} |
2583 |
|
2584 |
head = &(*head)->next; |
2585 |
} |
2586 |
} |
2587 |
|
2588 |
/* internal, faster, version of ev_clear_pending */ |
2589 |
inline_speed void |
2590 |
clear_pending (EV_P_ W w) |
2591 |
{ |
2592 |
if (w->pending) |
2593 |
{ |
2594 |
pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; |
2595 |
w->pending = 0; |
2596 |
} |
2597 |
} |
2598 |
|
2599 |
int |
2600 |
ev_clear_pending (EV_P_ void *w) |
2601 |
{ |
2602 |
W w_ = (W)w; |
2603 |
int pending = w_->pending; |
2604 |
|
2605 |
if (expect_true (pending)) |
2606 |
{ |
2607 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
2608 |
p->w = (W)&pending_w; |
2609 |
w_->pending = 0; |
2610 |
return p->events; |
2611 |
} |
2612 |
else |
2613 |
return 0; |
2614 |
} |
2615 |
|
2616 |
inline_size void |
2617 |
pri_adjust (EV_P_ W w) |
2618 |
{ |
2619 |
int pri = ev_priority (w); |
2620 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
2621 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
2622 |
ev_set_priority (w, pri); |
2623 |
} |
2624 |
|
2625 |
inline_speed void |
2626 |
ev_start (EV_P_ W w, int active) |
2627 |
{ |
2628 |
pri_adjust (EV_A_ w); |
2629 |
w->active = active; |
2630 |
ev_ref (EV_A); |
2631 |
} |
2632 |
|
2633 |
inline_size void |
2634 |
ev_stop (EV_P_ W w) |
2635 |
{ |
2636 |
ev_unref (EV_A); |
2637 |
w->active = 0; |
2638 |
} |
2639 |
|
2640 |
/*****************************************************************************/ |
2641 |
|
2642 |
void noinline |
2643 |
ev_io_start (EV_P_ ev_io *w) |
2644 |
{ |
2645 |
int fd = w->fd; |
2646 |
|
2647 |
if (expect_false (ev_is_active (w))) |
2648 |
return; |
2649 |
|
2650 |
assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2651 |
assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2652 |
|
2653 |
EV_FREQUENT_CHECK; |
2654 |
|
2655 |
ev_start (EV_A_ (W)w, 1); |
2656 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2657 |
wlist_add (&anfds[fd].head, (WL)w); |
2658 |
|
2659 |
fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); |
2660 |
w->events &= ~EV__IOFDSET; |
2661 |
|
2662 |
EV_FREQUENT_CHECK; |
2663 |
} |
2664 |
|
2665 |
void noinline |
2666 |
ev_io_stop (EV_P_ ev_io *w) |
2667 |
{ |
2668 |
clear_pending (EV_A_ (W)w); |
2669 |
if (expect_false (!ev_is_active (w))) |
2670 |
return; |
2671 |
|
2672 |
assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
2673 |
|
2674 |
EV_FREQUENT_CHECK; |
2675 |
|
2676 |
wlist_del (&anfds[w->fd].head, (WL)w); |
2677 |
ev_stop (EV_A_ (W)w); |
2678 |
|
2679 |
fd_change (EV_A_ w->fd, EV_ANFD_REIFY); |
2680 |
|
2681 |
EV_FREQUENT_CHECK; |
2682 |
} |
2683 |
|
2684 |
void noinline |
2685 |
ev_timer_start (EV_P_ ev_timer *w) |
2686 |
{ |
2687 |
if (expect_false (ev_is_active (w))) |
2688 |
return; |
2689 |
|
2690 |
ev_at (w) += mn_now; |
2691 |
|
2692 |
assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
2693 |
|
2694 |
EV_FREQUENT_CHECK; |
2695 |
|
2696 |
++timercnt; |
2697 |
ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); |
2698 |
array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); |
2699 |
ANHE_w (timers [ev_active (w)]) = (WT)w; |
2700 |
ANHE_at_cache (timers [ev_active (w)]); |
2701 |
upheap (timers, ev_active (w)); |
2702 |
|
2703 |
EV_FREQUENT_CHECK; |
2704 |
|
2705 |
/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ |
2706 |
} |
2707 |
|
2708 |
void noinline |
2709 |
ev_timer_stop (EV_P_ ev_timer *w) |
2710 |
{ |
2711 |
clear_pending (EV_A_ (W)w); |
2712 |
if (expect_false (!ev_is_active (w))) |
2713 |
return; |
2714 |
|
2715 |
EV_FREQUENT_CHECK; |
2716 |
|
2717 |
{ |
2718 |
int active = ev_active (w); |
2719 |
|
2720 |
assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); |
2721 |
|
2722 |
--timercnt; |
2723 |
|
2724 |
if (expect_true (active < timercnt + HEAP0)) |
2725 |
{ |
2726 |
timers [active] = timers [timercnt + HEAP0]; |
2727 |
adjustheap (timers, timercnt, active); |
2728 |
} |
2729 |
} |
2730 |
|
2731 |
ev_at (w) -= mn_now; |
2732 |
|
2733 |
ev_stop (EV_A_ (W)w); |
2734 |
|
2735 |
EV_FREQUENT_CHECK; |
2736 |
} |
2737 |
|
2738 |
void noinline |
2739 |
ev_timer_again (EV_P_ ev_timer *w) |
2740 |
{ |
2741 |
EV_FREQUENT_CHECK; |
2742 |
|
2743 |
if (ev_is_active (w)) |
2744 |
{ |
2745 |
if (w->repeat) |
2746 |
{ |
2747 |
ev_at (w) = mn_now + w->repeat; |
2748 |
ANHE_at_cache (timers [ev_active (w)]); |
2749 |
adjustheap (timers, timercnt, ev_active (w)); |
2750 |
} |
2751 |
else |
2752 |
ev_timer_stop (EV_A_ w); |
2753 |
} |
2754 |
else if (w->repeat) |
2755 |
{ |
2756 |
ev_at (w) = w->repeat; |
2757 |
ev_timer_start (EV_A_ w); |
2758 |
} |
2759 |
|
2760 |
EV_FREQUENT_CHECK; |
2761 |
} |
2762 |
|
2763 |
ev_tstamp |
2764 |
ev_timer_remaining (EV_P_ ev_timer *w) |
2765 |
{ |
2766 |
return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); |
2767 |
} |
2768 |
|
2769 |
#if EV_PERIODIC_ENABLE |
2770 |
void noinline |
2771 |
ev_periodic_start (EV_P_ ev_periodic *w) |
2772 |
{ |
2773 |
if (expect_false (ev_is_active (w))) |
2774 |
return; |
2775 |
|
2776 |
if (w->reschedule_cb) |
2777 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2778 |
else if (w->interval) |
2779 |
{ |
2780 |
assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2781 |
periodic_recalc (EV_A_ w); |
2782 |
} |
2783 |
else |
2784 |
ev_at (w) = w->offset; |
2785 |
|
2786 |
EV_FREQUENT_CHECK; |
2787 |
|
2788 |
++periodiccnt; |
2789 |
ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); |
2790 |
array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); |
2791 |
ANHE_w (periodics [ev_active (w)]) = (WT)w; |
2792 |
ANHE_at_cache (periodics [ev_active (w)]); |
2793 |
upheap (periodics, ev_active (w)); |
2794 |
|
2795 |
EV_FREQUENT_CHECK; |
2796 |
|
2797 |
/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ |
2798 |
} |
2799 |
|
2800 |
void noinline |
2801 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
2802 |
{ |
2803 |
clear_pending (EV_A_ (W)w); |
2804 |
if (expect_false (!ev_is_active (w))) |
2805 |
return; |
2806 |
|
2807 |
EV_FREQUENT_CHECK; |
2808 |
|
2809 |
{ |
2810 |
int active = ev_active (w); |
2811 |
|
2812 |
assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); |
2813 |
|
2814 |
--periodiccnt; |
2815 |
|
2816 |
if (expect_true (active < periodiccnt + HEAP0)) |
2817 |
{ |
2818 |
periodics [active] = periodics [periodiccnt + HEAP0]; |
2819 |
adjustheap (periodics, periodiccnt, active); |
2820 |
} |
2821 |
} |
2822 |
|
2823 |
ev_stop (EV_A_ (W)w); |
2824 |
|
2825 |
EV_FREQUENT_CHECK; |
2826 |
} |
2827 |
|
2828 |
void noinline |
2829 |
ev_periodic_again (EV_P_ ev_periodic *w) |
2830 |
{ |
2831 |
/* TODO: use adjustheap and recalculation */ |
2832 |
ev_periodic_stop (EV_A_ w); |
2833 |
ev_periodic_start (EV_A_ w); |
2834 |
} |
2835 |
#endif |
2836 |
|
2837 |
#ifndef SA_RESTART |
2838 |
# define SA_RESTART 0 |
2839 |
#endif |
2840 |
|
2841 |
#if EV_SIGNAL_ENABLE |
2842 |
|
2843 |
void noinline |
2844 |
ev_signal_start (EV_P_ ev_signal *w) |
2845 |
{ |
2846 |
if (expect_false (ev_is_active (w))) |
2847 |
return; |
2848 |
|
2849 |
assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); |
2850 |
|
2851 |
#if EV_MULTIPLICITY |
2852 |
assert (("libev: a signal must not be attached to two different loops", |
2853 |
!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); |
2854 |
|
2855 |
signals [w->signum - 1].loop = EV_A; |
2856 |
#endif |
2857 |
|
2858 |
EV_FREQUENT_CHECK; |
2859 |
|
2860 |
#if EV_USE_SIGNALFD |
2861 |
if (sigfd == -2) |
2862 |
{ |
2863 |
sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); |
2864 |
if (sigfd < 0 && errno == EINVAL) |
2865 |
sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ |
2866 |
|
2867 |
if (sigfd >= 0) |
2868 |
{ |
2869 |
fd_intern (sigfd); /* doing it twice will not hurt */ |
2870 |
|
2871 |
sigemptyset (&sigfd_set); |
2872 |
|
2873 |
ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); |
2874 |
ev_set_priority (&sigfd_w, EV_MAXPRI); |
2875 |
ev_io_start (EV_A_ &sigfd_w); |
2876 |
ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ |
2877 |
} |
2878 |
} |
2879 |
|
2880 |
if (sigfd >= 0) |
2881 |
{ |
2882 |
/* TODO: check .head */ |
2883 |
sigaddset (&sigfd_set, w->signum); |
2884 |
sigprocmask (SIG_BLOCK, &sigfd_set, 0); |
2885 |
|
2886 |
signalfd (sigfd, &sigfd_set, 0); |
2887 |
} |
2888 |
#endif |
2889 |
|
2890 |
ev_start (EV_A_ (W)w, 1); |
2891 |
wlist_add (&signals [w->signum - 1].head, (WL)w); |
2892 |
|
2893 |
if (!((WL)w)->next) |
2894 |
# if EV_USE_SIGNALFD |
2895 |
if (sigfd < 0) /*TODO*/ |
2896 |
# endif |
2897 |
{ |
2898 |
# ifdef _WIN32 |
2899 |
evpipe_init (EV_A); |
2900 |
|
2901 |
signal (w->signum, ev_sighandler); |
2902 |
# else |
2903 |
struct sigaction sa; |
2904 |
|
2905 |
evpipe_init (EV_A); |
2906 |
|
2907 |
sa.sa_handler = ev_sighandler; |
2908 |
sigfillset (&sa.sa_mask); |
2909 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2910 |
sigaction (w->signum, &sa, 0); |
2911 |
|
2912 |
if (origflags & EVFLAG_NOSIGMASK) |
2913 |
{ |
2914 |
sigemptyset (&sa.sa_mask); |
2915 |
sigaddset (&sa.sa_mask, w->signum); |
2916 |
sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
2917 |
} |
2918 |
#endif |
2919 |
} |
2920 |
|
2921 |
EV_FREQUENT_CHECK; |
2922 |
} |
2923 |
|
2924 |
void noinline |
2925 |
ev_signal_stop (EV_P_ ev_signal *w) |
2926 |
{ |
2927 |
clear_pending (EV_A_ (W)w); |
2928 |
if (expect_false (!ev_is_active (w))) |
2929 |
return; |
2930 |
|
2931 |
EV_FREQUENT_CHECK; |
2932 |
|
2933 |
wlist_del (&signals [w->signum - 1].head, (WL)w); |
2934 |
ev_stop (EV_A_ (W)w); |
2935 |
|
2936 |
if (!signals [w->signum - 1].head) |
2937 |
{ |
2938 |
#if EV_MULTIPLICITY |
2939 |
signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2940 |
#endif |
2941 |
#if EV_USE_SIGNALFD |
2942 |
if (sigfd >= 0) |
2943 |
{ |
2944 |
sigset_t ss; |
2945 |
|
2946 |
sigemptyset (&ss); |
2947 |
sigaddset (&ss, w->signum); |
2948 |
sigdelset (&sigfd_set, w->signum); |
2949 |
|
2950 |
signalfd (sigfd, &sigfd_set, 0); |
2951 |
sigprocmask (SIG_UNBLOCK, &ss, 0); |
2952 |
} |
2953 |
else |
2954 |
#endif |
2955 |
signal (w->signum, SIG_DFL); |
2956 |
} |
2957 |
|
2958 |
EV_FREQUENT_CHECK; |
2959 |
} |
2960 |
|
2961 |
#endif |
2962 |
|
2963 |
#if EV_CHILD_ENABLE |
2964 |
|
2965 |
void |
2966 |
ev_child_start (EV_P_ ev_child *w) |
2967 |
{ |
2968 |
#if EV_MULTIPLICITY |
2969 |
assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
2970 |
#endif |
2971 |
if (expect_false (ev_is_active (w))) |
2972 |
return; |
2973 |
|
2974 |
EV_FREQUENT_CHECK; |
2975 |
|
2976 |
ev_start (EV_A_ (W)w, 1); |
2977 |
wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
2978 |
|
2979 |
EV_FREQUENT_CHECK; |
2980 |
} |
2981 |
|
2982 |
void |
2983 |
ev_child_stop (EV_P_ ev_child *w) |
2984 |
{ |
2985 |
clear_pending (EV_A_ (W)w); |
2986 |
if (expect_false (!ev_is_active (w))) |
2987 |
return; |
2988 |
|
2989 |
EV_FREQUENT_CHECK; |
2990 |
|
2991 |
wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
2992 |
ev_stop (EV_A_ (W)w); |
2993 |
|
2994 |
EV_FREQUENT_CHECK; |
2995 |
} |
2996 |
|
2997 |
#endif |
2998 |
|
2999 |
#if EV_STAT_ENABLE |
3000 |
|
3001 |
# ifdef _WIN32 |
3002 |
# undef lstat |
3003 |
# define lstat(a,b) _stati64 (a,b) |
3004 |
# endif |
3005 |
|
3006 |
#define DEF_STAT_INTERVAL 5.0074891 |
3007 |
#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ |
3008 |
#define MIN_STAT_INTERVAL 0.1074891 |
3009 |
|
3010 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
3011 |
|
3012 |
#if EV_USE_INOTIFY |
3013 |
|
3014 |
/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
3015 |
# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
3016 |
|
3017 |
static void noinline |
3018 |
infy_add (EV_P_ ev_stat *w) |
3019 |
{ |
3020 |
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); |
3021 |
|
3022 |
if (w->wd >= 0) |
3023 |
{ |
3024 |
struct statfs sfs; |
3025 |
|
3026 |
/* now local changes will be tracked by inotify, but remote changes won't */ |
3027 |
/* unless the filesystem is known to be local, we therefore still poll */ |
3028 |
/* also do poll on <2.6.25, but with normal frequency */ |
3029 |
|
3030 |
if (!fs_2625) |
3031 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
3032 |
else if (!statfs (w->path, &sfs) |
3033 |
&& (sfs.f_type == 0x1373 /* devfs */ |
3034 |
|| sfs.f_type == 0xEF53 /* ext2/3 */ |
3035 |
|| sfs.f_type == 0x3153464a /* jfs */ |
3036 |
|| sfs.f_type == 0x52654973 /* reiser3 */ |
3037 |
|| sfs.f_type == 0x01021994 /* tempfs */ |
3038 |
|| sfs.f_type == 0x58465342 /* xfs */)) |
3039 |
w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
3040 |
else |
3041 |
w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
3042 |
} |
3043 |
else |
3044 |
{ |
3045 |
/* can't use inotify, continue to stat */ |
3046 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
3047 |
|
3048 |
/* if path is not there, monitor some parent directory for speedup hints */ |
3049 |
/* note that exceeding the hardcoded path limit is not a correctness issue, */ |
3050 |
/* but an efficiency issue only */ |
3051 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
3052 |
{ |
3053 |
char path [4096]; |
3054 |
strcpy (path, w->path); |
3055 |
|
3056 |
do |
3057 |
{ |
3058 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
3059 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
3060 |
|
3061 |
char *pend = strrchr (path, '/'); |
3062 |
|
3063 |
if (!pend || pend == path) |
3064 |
break; |
3065 |
|
3066 |
*pend = 0; |
3067 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
3068 |
} |
3069 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
3070 |
} |
3071 |
} |
3072 |
|
3073 |
if (w->wd >= 0) |
3074 |
wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
3075 |
|
3076 |
/* now re-arm timer, if required */ |
3077 |
if (ev_is_active (&w->timer)) ev_ref (EV_A); |
3078 |
ev_timer_again (EV_A_ &w->timer); |
3079 |
if (ev_is_active (&w->timer)) ev_unref (EV_A); |
3080 |
} |
3081 |
|
3082 |
static void noinline |
3083 |
infy_del (EV_P_ ev_stat *w) |
3084 |
{ |
3085 |
int slot; |
3086 |
int wd = w->wd; |
3087 |
|
3088 |
if (wd < 0) |
3089 |
return; |
3090 |
|
3091 |
w->wd = -2; |
3092 |
slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); |
3093 |
wlist_del (&fs_hash [slot].head, (WL)w); |
3094 |
|
3095 |
/* remove this watcher, if others are watching it, they will rearm */ |
3096 |
inotify_rm_watch (fs_fd, wd); |
3097 |
} |
3098 |
|
3099 |
static void noinline |
3100 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
3101 |
{ |
3102 |
if (slot < 0) |
3103 |
/* overflow, need to check for all hash slots */ |
3104 |
for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
3105 |
infy_wd (EV_A_ slot, wd, ev); |
3106 |
else |
3107 |
{ |
3108 |
WL w_; |
3109 |
|
3110 |
for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) |
3111 |
{ |
3112 |
ev_stat *w = (ev_stat *)w_; |
3113 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
3114 |
|
3115 |
if (w->wd == wd || wd == -1) |
3116 |
{ |
3117 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
3118 |
{ |
3119 |
wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
3120 |
w->wd = -1; |
3121 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
3122 |
} |
3123 |
|
3124 |
stat_timer_cb (EV_A_ &w->timer, 0); |
3125 |
} |
3126 |
} |
3127 |
} |
3128 |
} |
3129 |
|
3130 |
static void |
3131 |
infy_cb (EV_P_ ev_io *w, int revents) |
3132 |
{ |
3133 |
char buf [EV_INOTIFY_BUFSIZE]; |
3134 |
int ofs; |
3135 |
int len = read (fs_fd, buf, sizeof (buf)); |
3136 |
|
3137 |
for (ofs = 0; ofs < len; ) |
3138 |
{ |
3139 |
struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
3140 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
3141 |
ofs += sizeof (struct inotify_event) + ev->len; |
3142 |
} |
3143 |
} |
3144 |
|
3145 |
inline_size void |
3146 |
ev_check_2625 (EV_P) |
3147 |
{ |
3148 |
/* kernels < 2.6.25 are borked |
3149 |
* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
3150 |
*/ |
3151 |
if (ev_linux_version () < 0x020619) |
3152 |
return; |
3153 |
|
3154 |
fs_2625 = 1; |
3155 |
} |
3156 |
|
3157 |
inline_size int |
3158 |
infy_newfd (void) |
3159 |
{ |
3160 |
#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) |
3161 |
int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
3162 |
if (fd >= 0) |
3163 |
return fd; |
3164 |
#endif |
3165 |
return inotify_init (); |
3166 |
} |
3167 |
|
3168 |
inline_size void |
3169 |
infy_init (EV_P) |
3170 |
{ |
3171 |
if (fs_fd != -2) |
3172 |
return; |
3173 |
|
3174 |
fs_fd = -1; |
3175 |
|
3176 |
ev_check_2625 (EV_A); |
3177 |
|
3178 |
fs_fd = infy_newfd (); |
3179 |
|
3180 |
if (fs_fd >= 0) |
3181 |
{ |
3182 |
fd_intern (fs_fd); |
3183 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
3184 |
ev_set_priority (&fs_w, EV_MAXPRI); |
3185 |
ev_io_start (EV_A_ &fs_w); |
3186 |
ev_unref (EV_A); |
3187 |
} |
3188 |
} |
3189 |
|
3190 |
inline_size void |
3191 |
infy_fork (EV_P) |
3192 |
{ |
3193 |
int slot; |
3194 |
|
3195 |
if (fs_fd < 0) |
3196 |
return; |
3197 |
|
3198 |
ev_ref (EV_A); |
3199 |
ev_io_stop (EV_A_ &fs_w); |
3200 |
close (fs_fd); |
3201 |
fs_fd = infy_newfd (); |
3202 |
|
3203 |
if (fs_fd >= 0) |
3204 |
{ |
3205 |
fd_intern (fs_fd); |
3206 |
ev_io_set (&fs_w, fs_fd, EV_READ); |
3207 |
ev_io_start (EV_A_ &fs_w); |
3208 |
ev_unref (EV_A); |
3209 |
} |
3210 |
|
3211 |
for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
3212 |
{ |
3213 |
WL w_ = fs_hash [slot].head; |
3214 |
fs_hash [slot].head = 0; |
3215 |
|
3216 |
while (w_) |
3217 |
{ |
3218 |
ev_stat *w = (ev_stat *)w_; |
3219 |
w_ = w_->next; /* lets us add this watcher */ |
3220 |
|
3221 |
w->wd = -1; |
3222 |
|
3223 |
if (fs_fd >= 0) |
3224 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
3225 |
else |
3226 |
{ |
3227 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
3228 |
if (ev_is_active (&w->timer)) ev_ref (EV_A); |
3229 |
ev_timer_again (EV_A_ &w->timer); |
3230 |
if (ev_is_active (&w->timer)) ev_unref (EV_A); |
3231 |
} |
3232 |
} |
3233 |
} |
3234 |
} |
3235 |
|
3236 |
#endif |
3237 |
|
3238 |
#ifdef _WIN32 |
3239 |
# define EV_LSTAT(p,b) _stati64 (p, b) |
3240 |
#else |
3241 |
# define EV_LSTAT(p,b) lstat (p, b) |
3242 |
#endif |
3243 |
|
3244 |
void |
3245 |
ev_stat_stat (EV_P_ ev_stat *w) |
3246 |
{ |
3247 |
if (lstat (w->path, &w->attr) < 0) |
3248 |
w->attr.st_nlink = 0; |
3249 |
else if (!w->attr.st_nlink) |
3250 |
w->attr.st_nlink = 1; |
3251 |
} |
3252 |
|
3253 |
static void noinline |
3254 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3255 |
{ |
3256 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3257 |
|
3258 |
ev_statdata prev = w->attr; |
3259 |
ev_stat_stat (EV_A_ w); |
3260 |
|
3261 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3262 |
if ( |
3263 |
prev.st_dev != w->attr.st_dev |
3264 |
|| prev.st_ino != w->attr.st_ino |
3265 |
|| prev.st_mode != w->attr.st_mode |
3266 |
|| prev.st_nlink != w->attr.st_nlink |
3267 |
|| prev.st_uid != w->attr.st_uid |
3268 |
|| prev.st_gid != w->attr.st_gid |
3269 |
|| prev.st_rdev != w->attr.st_rdev |
3270 |
|| prev.st_size != w->attr.st_size |
3271 |
|| prev.st_atime != w->attr.st_atime |
3272 |
|| prev.st_mtime != w->attr.st_mtime |
3273 |
|| prev.st_ctime != w->attr.st_ctime |
3274 |
) { |
3275 |
/* we only update w->prev on actual differences */ |
3276 |
/* in case we test more often than invoke the callback, */ |
3277 |
/* to ensure that prev is always different to attr */ |
3278 |
w->prev = prev; |
3279 |
|
3280 |
#if EV_USE_INOTIFY |
3281 |
if (fs_fd >= 0) |
3282 |
{ |
3283 |
infy_del (EV_A_ w); |
3284 |
infy_add (EV_A_ w); |
3285 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
3286 |
} |
3287 |
#endif |
3288 |
|
3289 |
ev_feed_event (EV_A_ w, EV_STAT); |
3290 |
} |
3291 |
} |
3292 |
|
3293 |
void |
3294 |
ev_stat_start (EV_P_ ev_stat *w) |
3295 |
{ |
3296 |
if (expect_false (ev_is_active (w))) |
3297 |
return; |
3298 |
|
3299 |
ev_stat_stat (EV_A_ w); |
3300 |
|
3301 |
if (w->interval < MIN_STAT_INTERVAL && w->interval) |
3302 |
w->interval = MIN_STAT_INTERVAL; |
3303 |
|
3304 |
ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); |
3305 |
ev_set_priority (&w->timer, ev_priority (w)); |
3306 |
|
3307 |
#if EV_USE_INOTIFY |
3308 |
infy_init (EV_A); |
3309 |
|
3310 |
if (fs_fd >= 0) |
3311 |
infy_add (EV_A_ w); |
3312 |
else |
3313 |
#endif |
3314 |
{ |
3315 |
ev_timer_again (EV_A_ &w->timer); |
3316 |
ev_unref (EV_A); |
3317 |
} |
3318 |
|
3319 |
ev_start (EV_A_ (W)w, 1); |
3320 |
|
3321 |
EV_FREQUENT_CHECK; |
3322 |
} |
3323 |
|
3324 |
void |
3325 |
ev_stat_stop (EV_P_ ev_stat *w) |
3326 |
{ |
3327 |
clear_pending (EV_A_ (W)w); |
3328 |
if (expect_false (!ev_is_active (w))) |
3329 |
return; |
3330 |
|
3331 |
EV_FREQUENT_CHECK; |
3332 |
|
3333 |
#if EV_USE_INOTIFY |
3334 |
infy_del (EV_A_ w); |
3335 |
#endif |
3336 |
|
3337 |
if (ev_is_active (&w->timer)) |
3338 |
{ |
3339 |
ev_ref (EV_A); |
3340 |
ev_timer_stop (EV_A_ &w->timer); |
3341 |
} |
3342 |
|
3343 |
ev_stop (EV_A_ (W)w); |
3344 |
|
3345 |
EV_FREQUENT_CHECK; |
3346 |
} |
3347 |
#endif |
3348 |
|
3349 |
#if EV_IDLE_ENABLE |
3350 |
void |
3351 |
ev_idle_start (EV_P_ ev_idle *w) |
3352 |
{ |
3353 |
if (expect_false (ev_is_active (w))) |
3354 |
return; |
3355 |
|
3356 |
pri_adjust (EV_A_ (W)w); |
3357 |
|
3358 |
EV_FREQUENT_CHECK; |
3359 |
|
3360 |
{ |
3361 |
int active = ++idlecnt [ABSPRI (w)]; |
3362 |
|
3363 |
++idleall; |
3364 |
ev_start (EV_A_ (W)w, active); |
3365 |
|
3366 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
3367 |
idles [ABSPRI (w)][active - 1] = w; |
3368 |
} |
3369 |
|
3370 |
EV_FREQUENT_CHECK; |
3371 |
} |
3372 |
|
3373 |
void |
3374 |
ev_idle_stop (EV_P_ ev_idle *w) |
3375 |
{ |
3376 |
clear_pending (EV_A_ (W)w); |
3377 |
if (expect_false (!ev_is_active (w))) |
3378 |
return; |
3379 |
|
3380 |
EV_FREQUENT_CHECK; |
3381 |
|
3382 |
{ |
3383 |
int active = ev_active (w); |
3384 |
|
3385 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
3386 |
ev_active (idles [ABSPRI (w)][active - 1]) = active; |
3387 |
|
3388 |
ev_stop (EV_A_ (W)w); |
3389 |
--idleall; |
3390 |
} |
3391 |
|
3392 |
EV_FREQUENT_CHECK; |
3393 |
} |
3394 |
#endif |
3395 |
|
3396 |
#if EV_PREPARE_ENABLE |
3397 |
void |
3398 |
ev_prepare_start (EV_P_ ev_prepare *w) |
3399 |
{ |
3400 |
if (expect_false (ev_is_active (w))) |
3401 |
return; |
3402 |
|
3403 |
EV_FREQUENT_CHECK; |
3404 |
|
3405 |
ev_start (EV_A_ (W)w, ++preparecnt); |
3406 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
3407 |
prepares [preparecnt - 1] = w; |
3408 |
|
3409 |
EV_FREQUENT_CHECK; |
3410 |
} |
3411 |
|
3412 |
void |
3413 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
3414 |
{ |
3415 |
clear_pending (EV_A_ (W)w); |
3416 |
if (expect_false (!ev_is_active (w))) |
3417 |
return; |
3418 |
|
3419 |
EV_FREQUENT_CHECK; |
3420 |
|
3421 |
{ |
3422 |
int active = ev_active (w); |
3423 |
|
3424 |
prepares [active - 1] = prepares [--preparecnt]; |
3425 |
ev_active (prepares [active - 1]) = active; |
3426 |
} |
3427 |
|
3428 |
ev_stop (EV_A_ (W)w); |
3429 |
|
3430 |
EV_FREQUENT_CHECK; |
3431 |
} |
3432 |
#endif |
3433 |
|
3434 |
#if EV_CHECK_ENABLE |
3435 |
void |
3436 |
ev_check_start (EV_P_ ev_check *w) |
3437 |
{ |
3438 |
if (expect_false (ev_is_active (w))) |
3439 |
return; |
3440 |
|
3441 |
EV_FREQUENT_CHECK; |
3442 |
|
3443 |
ev_start (EV_A_ (W)w, ++checkcnt); |
3444 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
3445 |
checks [checkcnt - 1] = w; |
3446 |
|
3447 |
EV_FREQUENT_CHECK; |
3448 |
} |
3449 |
|
3450 |
void |
3451 |
ev_check_stop (EV_P_ ev_check *w) |
3452 |
{ |
3453 |
clear_pending (EV_A_ (W)w); |
3454 |
if (expect_false (!ev_is_active (w))) |
3455 |
return; |
3456 |
|
3457 |
EV_FREQUENT_CHECK; |
3458 |
|
3459 |
{ |
3460 |
int active = ev_active (w); |
3461 |
|
3462 |
checks [active - 1] = checks [--checkcnt]; |
3463 |
ev_active (checks [active - 1]) = active; |
3464 |
} |
3465 |
|
3466 |
ev_stop (EV_A_ (W)w); |
3467 |
|
3468 |
EV_FREQUENT_CHECK; |
3469 |
} |
3470 |
#endif |
3471 |
|
3472 |
#if EV_EMBED_ENABLE |
3473 |
void noinline |
3474 |
ev_embed_sweep (EV_P_ ev_embed *w) |
3475 |
{ |
3476 |
ev_run (w->other, EVRUN_NOWAIT); |
3477 |
} |
3478 |
|
3479 |
static void |
3480 |
embed_io_cb (EV_P_ ev_io *io, int revents) |
3481 |
{ |
3482 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
3483 |
|
3484 |
if (ev_cb (w)) |
3485 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
3486 |
else |
3487 |
ev_run (w->other, EVRUN_NOWAIT); |
3488 |
} |
3489 |
|
3490 |
static void |
3491 |
embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
3492 |
{ |
3493 |
ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
3494 |
|
3495 |
{ |
3496 |
EV_P = w->other; |
3497 |
|
3498 |
while (fdchangecnt) |
3499 |
{ |
3500 |
fd_reify (EV_A); |
3501 |
ev_run (EV_A_ EVRUN_NOWAIT); |
3502 |
} |
3503 |
} |
3504 |
} |
3505 |
|
3506 |
static void |
3507 |
embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) |
3508 |
{ |
3509 |
ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); |
3510 |
|
3511 |
ev_embed_stop (EV_A_ w); |
3512 |
|
3513 |
{ |
3514 |
EV_P = w->other; |
3515 |
|
3516 |
ev_loop_fork (EV_A); |
3517 |
ev_run (EV_A_ EVRUN_NOWAIT); |
3518 |
} |
3519 |
|
3520 |
ev_embed_start (EV_A_ w); |
3521 |
} |
3522 |
|
3523 |
#if 0 |
3524 |
static void |
3525 |
embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
3526 |
{ |
3527 |
ev_idle_stop (EV_A_ idle); |
3528 |
} |
3529 |
#endif |
3530 |
|
3531 |
void |
3532 |
ev_embed_start (EV_P_ ev_embed *w) |
3533 |
{ |
3534 |
if (expect_false (ev_is_active (w))) |
3535 |
return; |
3536 |
|
3537 |
{ |
3538 |
EV_P = w->other; |
3539 |
assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
3540 |
ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
3541 |
} |
3542 |
|
3543 |
EV_FREQUENT_CHECK; |
3544 |
|
3545 |
ev_set_priority (&w->io, ev_priority (w)); |
3546 |
ev_io_start (EV_A_ &w->io); |
3547 |
|
3548 |
ev_prepare_init (&w->prepare, embed_prepare_cb); |
3549 |
ev_set_priority (&w->prepare, EV_MINPRI); |
3550 |
ev_prepare_start (EV_A_ &w->prepare); |
3551 |
|
3552 |
ev_fork_init (&w->fork, embed_fork_cb); |
3553 |
ev_fork_start (EV_A_ &w->fork); |
3554 |
|
3555 |
/*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
3556 |
|
3557 |
ev_start (EV_A_ (W)w, 1); |
3558 |
|
3559 |
EV_FREQUENT_CHECK; |
3560 |
} |
3561 |
|
3562 |
void |
3563 |
ev_embed_stop (EV_P_ ev_embed *w) |
3564 |
{ |
3565 |
clear_pending (EV_A_ (W)w); |
3566 |
if (expect_false (!ev_is_active (w))) |
3567 |
return; |
3568 |
|
3569 |
EV_FREQUENT_CHECK; |
3570 |
|
3571 |
ev_io_stop (EV_A_ &w->io); |
3572 |
ev_prepare_stop (EV_A_ &w->prepare); |
3573 |
ev_fork_stop (EV_A_ &w->fork); |
3574 |
|
3575 |
ev_stop (EV_A_ (W)w); |
3576 |
|
3577 |
EV_FREQUENT_CHECK; |
3578 |
} |
3579 |
#endif |
3580 |
|
3581 |
#if EV_FORK_ENABLE |
3582 |
void |
3583 |
ev_fork_start (EV_P_ ev_fork *w) |
3584 |
{ |
3585 |
if (expect_false (ev_is_active (w))) |
3586 |
return; |
3587 |
|
3588 |
EV_FREQUENT_CHECK; |
3589 |
|
3590 |
ev_start (EV_A_ (W)w, ++forkcnt); |
3591 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
3592 |
forks [forkcnt - 1] = w; |
3593 |
|
3594 |
EV_FREQUENT_CHECK; |
3595 |
} |
3596 |
|
3597 |
void |
3598 |
ev_fork_stop (EV_P_ ev_fork *w) |
3599 |
{ |
3600 |
clear_pending (EV_A_ (W)w); |
3601 |
if (expect_false (!ev_is_active (w))) |
3602 |
return; |
3603 |
|
3604 |
EV_FREQUENT_CHECK; |
3605 |
|
3606 |
{ |
3607 |
int active = ev_active (w); |
3608 |
|
3609 |
forks [active - 1] = forks [--forkcnt]; |
3610 |
ev_active (forks [active - 1]) = active; |
3611 |
} |
3612 |
|
3613 |
ev_stop (EV_A_ (W)w); |
3614 |
|
3615 |
EV_FREQUENT_CHECK; |
3616 |
} |
3617 |
#endif |
3618 |
|
3619 |
#if EV_CLEANUP_ENABLE |
3620 |
void |
3621 |
ev_cleanup_start (EV_P_ ev_cleanup *w) |
3622 |
{ |
3623 |
if (expect_false (ev_is_active (w))) |
3624 |
return; |
3625 |
|
3626 |
EV_FREQUENT_CHECK; |
3627 |
|
3628 |
ev_start (EV_A_ (W)w, ++cleanupcnt); |
3629 |
array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
3630 |
cleanups [cleanupcnt - 1] = w; |
3631 |
|
3632 |
/* cleanup watchers should never keep a refcount on the loop */ |
3633 |
ev_unref (EV_A); |
3634 |
EV_FREQUENT_CHECK; |
3635 |
} |
3636 |
|
3637 |
void |
3638 |
ev_cleanup_stop (EV_P_ ev_cleanup *w) |
3639 |
{ |
3640 |
clear_pending (EV_A_ (W)w); |
3641 |
if (expect_false (!ev_is_active (w))) |
3642 |
return; |
3643 |
|
3644 |
EV_FREQUENT_CHECK; |
3645 |
ev_ref (EV_A); |
3646 |
|
3647 |
{ |
3648 |
int active = ev_active (w); |
3649 |
|
3650 |
cleanups [active - 1] = cleanups [--cleanupcnt]; |
3651 |
ev_active (cleanups [active - 1]) = active; |
3652 |
} |
3653 |
|
3654 |
ev_stop (EV_A_ (W)w); |
3655 |
|
3656 |
EV_FREQUENT_CHECK; |
3657 |
} |
3658 |
#endif |
3659 |
|
3660 |
#if EV_ASYNC_ENABLE |
3661 |
void |
3662 |
ev_async_start (EV_P_ ev_async *w) |
3663 |
{ |
3664 |
if (expect_false (ev_is_active (w))) |
3665 |
return; |
3666 |
|
3667 |
w->sent = 0; |
3668 |
|
3669 |
evpipe_init (EV_A); |
3670 |
|
3671 |
EV_FREQUENT_CHECK; |
3672 |
|
3673 |
ev_start (EV_A_ (W)w, ++asynccnt); |
3674 |
array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
3675 |
asyncs [asynccnt - 1] = w; |
3676 |
|
3677 |
EV_FREQUENT_CHECK; |
3678 |
} |
3679 |
|
3680 |
void |
3681 |
ev_async_stop (EV_P_ ev_async *w) |
3682 |
{ |
3683 |
clear_pending (EV_A_ (W)w); |
3684 |
if (expect_false (!ev_is_active (w))) |
3685 |
return; |
3686 |
|
3687 |
EV_FREQUENT_CHECK; |
3688 |
|
3689 |
{ |
3690 |
int active = ev_active (w); |
3691 |
|
3692 |
asyncs [active - 1] = asyncs [--asynccnt]; |
3693 |
ev_active (asyncs [active - 1]) = active; |
3694 |
} |
3695 |
|
3696 |
ev_stop (EV_A_ (W)w); |
3697 |
|
3698 |
EV_FREQUENT_CHECK; |
3699 |
} |
3700 |
|
3701 |
void |
3702 |
ev_async_send (EV_P_ ev_async *w) |
3703 |
{ |
3704 |
w->sent = 1; |
3705 |
evpipe_write (EV_A_ &async_pending); |
3706 |
} |
3707 |
#endif |
3708 |
|
3709 |
/*****************************************************************************/ |
3710 |
|
3711 |
struct ev_once |
3712 |
{ |
3713 |
ev_io io; |
3714 |
ev_timer to; |
3715 |
void (*cb)(int revents, void *arg); |
3716 |
void *arg; |
3717 |
}; |
3718 |
|
3719 |
static void |
3720 |
once_cb (EV_P_ struct ev_once *once, int revents) |
3721 |
{ |
3722 |
void (*cb)(int revents, void *arg) = once->cb; |
3723 |
void *arg = once->arg; |
3724 |
|
3725 |
ev_io_stop (EV_A_ &once->io); |
3726 |
ev_timer_stop (EV_A_ &once->to); |
3727 |
ev_free (once); |
3728 |
|
3729 |
cb (revents, arg); |
3730 |
} |
3731 |
|
3732 |
static void |
3733 |
once_cb_io (EV_P_ ev_io *w, int revents) |
3734 |
{ |
3735 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); |
3736 |
|
3737 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); |
3738 |
} |
3739 |
|
3740 |
static void |
3741 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
3742 |
{ |
3743 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); |
3744 |
|
3745 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); |
3746 |
} |
3747 |
|
3748 |
void |
3749 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
3750 |
{ |
3751 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
3752 |
|
3753 |
if (expect_false (!once)) |
3754 |
{ |
3755 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg); |
3756 |
return; |
3757 |
} |
3758 |
|
3759 |
once->cb = cb; |
3760 |
once->arg = arg; |
3761 |
|
3762 |
ev_init (&once->io, once_cb_io); |
3763 |
if (fd >= 0) |
3764 |
{ |
3765 |
ev_io_set (&once->io, fd, events); |
3766 |
ev_io_start (EV_A_ &once->io); |
3767 |
} |
3768 |
|
3769 |
ev_init (&once->to, once_cb_to); |
3770 |
if (timeout >= 0.) |
3771 |
{ |
3772 |
ev_timer_set (&once->to, timeout, 0.); |
3773 |
ev_timer_start (EV_A_ &once->to); |
3774 |
} |
3775 |
} |
3776 |
|
3777 |
/*****************************************************************************/ |
3778 |
|
3779 |
#if EV_WALK_ENABLE |
3780 |
void |
3781 |
ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) |
3782 |
{ |
3783 |
int i, j; |
3784 |
ev_watcher_list *wl, *wn; |
3785 |
|
3786 |
if (types & (EV_IO | EV_EMBED)) |
3787 |
for (i = 0; i < anfdmax; ++i) |
3788 |
for (wl = anfds [i].head; wl; ) |
3789 |
{ |
3790 |
wn = wl->next; |
3791 |
|
3792 |
#if EV_EMBED_ENABLE |
3793 |
if (ev_cb ((ev_io *)wl) == embed_io_cb) |
3794 |
{ |
3795 |
if (types & EV_EMBED) |
3796 |
cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); |
3797 |
} |
3798 |
else |
3799 |
#endif |
3800 |
#if EV_USE_INOTIFY |
3801 |
if (ev_cb ((ev_io *)wl) == infy_cb) |
3802 |
; |
3803 |
else |
3804 |
#endif |
3805 |
if ((ev_io *)wl != &pipe_w) |
3806 |
if (types & EV_IO) |
3807 |
cb (EV_A_ EV_IO, wl); |
3808 |
|
3809 |
wl = wn; |
3810 |
} |
3811 |
|
3812 |
if (types & (EV_TIMER | EV_STAT)) |
3813 |
for (i = timercnt + HEAP0; i-- > HEAP0; ) |
3814 |
#if EV_STAT_ENABLE |
3815 |
/*TODO: timer is not always active*/ |
3816 |
if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) |
3817 |
{ |
3818 |
if (types & EV_STAT) |
3819 |
cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); |
3820 |
} |
3821 |
else |
3822 |
#endif |
3823 |
if (types & EV_TIMER) |
3824 |
cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); |
3825 |
|
3826 |
#if EV_PERIODIC_ENABLE |
3827 |
if (types & EV_PERIODIC) |
3828 |
for (i = periodiccnt + HEAP0; i-- > HEAP0; ) |
3829 |
cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); |
3830 |
#endif |
3831 |
|
3832 |
#if EV_IDLE_ENABLE |
3833 |
if (types & EV_IDLE) |
3834 |
for (j = NUMPRI; i--; ) |
3835 |
for (i = idlecnt [j]; i--; ) |
3836 |
cb (EV_A_ EV_IDLE, idles [j][i]); |
3837 |
#endif |
3838 |
|
3839 |
#if EV_FORK_ENABLE |
3840 |
if (types & EV_FORK) |
3841 |
for (i = forkcnt; i--; ) |
3842 |
if (ev_cb (forks [i]) != embed_fork_cb) |
3843 |
cb (EV_A_ EV_FORK, forks [i]); |
3844 |
#endif |
3845 |
|
3846 |
#if EV_ASYNC_ENABLE |
3847 |
if (types & EV_ASYNC) |
3848 |
for (i = asynccnt; i--; ) |
3849 |
cb (EV_A_ EV_ASYNC, asyncs [i]); |
3850 |
#endif |
3851 |
|
3852 |
#if EV_PREPARE_ENABLE |
3853 |
if (types & EV_PREPARE) |
3854 |
for (i = preparecnt; i--; ) |
3855 |
# if EV_EMBED_ENABLE |
3856 |
if (ev_cb (prepares [i]) != embed_prepare_cb) |
3857 |
# endif |
3858 |
cb (EV_A_ EV_PREPARE, prepares [i]); |
3859 |
#endif |
3860 |
|
3861 |
#if EV_CHECK_ENABLE |
3862 |
if (types & EV_CHECK) |
3863 |
for (i = checkcnt; i--; ) |
3864 |
cb (EV_A_ EV_CHECK, checks [i]); |
3865 |
#endif |
3866 |
|
3867 |
#if EV_SIGNAL_ENABLE |
3868 |
if (types & EV_SIGNAL) |
3869 |
for (i = 0; i < EV_NSIG - 1; ++i) |
3870 |
for (wl = signals [i].head; wl; ) |
3871 |
{ |
3872 |
wn = wl->next; |
3873 |
cb (EV_A_ EV_SIGNAL, wl); |
3874 |
wl = wn; |
3875 |
} |
3876 |
#endif |
3877 |
|
3878 |
#if EV_CHILD_ENABLE |
3879 |
if (types & EV_CHILD) |
3880 |
for (i = (EV_PID_HASHSIZE); i--; ) |
3881 |
for (wl = childs [i]; wl; ) |
3882 |
{ |
3883 |
wn = wl->next; |
3884 |
cb (EV_A_ EV_CHILD, wl); |
3885 |
wl = wn; |
3886 |
} |
3887 |
#endif |
3888 |
/* EV_STAT 0x00001000 /* stat data changed */ |
3889 |
/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
3890 |
} |
3891 |
#endif |
3892 |
|
3893 |
#if EV_MULTIPLICITY |
3894 |
#include "ev_wrap.h" |
3895 |
#endif |
3896 |
|
3897 |
EV_CPP(}) |
3898 |
|