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/* |
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* libev event processing core, watcher management |
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* |
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* Copyright (c) 2007,2008,2009,2010,2011,2012,2013 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_FLOOR |
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# ifndef EV_USE_FLOOR |
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# define EV_USE_FLOOR 1 |
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# endif |
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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 <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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#if EV_NO_THREADS |
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# undef EV_NO_SMP |
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# define EV_NO_SMP 1 |
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# undef ECB_NO_THREADS |
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# define ECB_NO_THREADS 1 |
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#endif |
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#if EV_NO_SMP |
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# undef EV_NO_SMP |
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# define ECB_NO_SMP 1 |
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#endif |
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|
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#ifndef _WIN32 |
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# include <sys/time.h> |
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# include <sys/wait.h> |
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# include <unistd.h> |
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#else |
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# include <io.h> |
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# define WIN32_LEAN_AND_MEAN |
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# include <winsock2.h> |
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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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# define EV_NSIG (8 * sizeof (sigset_t) + 1) |
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#endif |
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|
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#ifndef EV_USE_FLOOR |
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# define EV_USE_FLOOR 0 |
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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 && __GLIBC_MINOR__ < 17 |
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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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#if !(_POSIX_TIMERS > 0) |
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# ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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# endif |
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# ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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# endif |
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#endif |
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|
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#ifndef EV_USE_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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#ifdef ANDROID |
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/* supposedly, android doesn't typedef fd_mask */ |
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# undef EV_USE_SELECT |
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# define EV_USE_SELECT 0 |
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/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */ |
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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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|
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/* aix's poll.h seems to cause lots of trouble */ |
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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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/* 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 <sys/syscall.h> |
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# ifdef SYS_clock_gettime |
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# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) |
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# undef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 1 |
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# else |
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# undef EV_USE_CLOCK_SYSCALL |
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# define EV_USE_CLOCK_SYSCALL 0 |
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# endif |
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#endif |
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|
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/* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
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|
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#ifndef CLOCK_MONOTONIC |
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# undef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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#endif |
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|
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#ifndef CLOCK_REALTIME |
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# undef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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|
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#if !EV_STAT_ENABLE |
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# undef EV_USE_INOTIFY |
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# define EV_USE_INOTIFY 0 |
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#endif |
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|
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#if !EV_USE_NANOSLEEP |
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/* 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_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 |
439 |
# 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 */ |
450 |
# include <stdint.h> |
451 |
# ifndef SFD_NONBLOCK |
452 |
# define SFD_NONBLOCK O_NONBLOCK |
453 |
# endif |
454 |
# ifndef SFD_CLOEXEC |
455 |
# ifdef O_CLOEXEC |
456 |
# 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); |
462 |
|
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struct signalfd_siginfo |
464 |
{ |
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uint32_t ssi_signo; |
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char pad[128 - sizeof (uint32_t)]; |
467 |
}; |
468 |
#endif |
469 |
|
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/**/ |
471 |
|
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#if EV_VERIFY >= 3 |
473 |
# define EV_FREQUENT_CHECK ev_verify (EV_A) |
474 |
#else |
475 |
# define EV_FREQUENT_CHECK do { } while (0) |
476 |
#endif |
477 |
|
478 |
/* |
479 |
* This is used to work around floating point rounding problems. |
480 |
* This value is good at least till the year 4000. |
481 |
*/ |
482 |
#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ |
483 |
/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ |
484 |
|
485 |
#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
486 |
#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
487 |
|
488 |
#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) |
489 |
#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) |
490 |
|
491 |
/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ |
492 |
/* ECB.H BEGIN */ |
493 |
/* |
494 |
* libecb - http://software.schmorp.de/pkg/libecb |
495 |
* |
496 |
* Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de> |
497 |
* Copyright (©) 2011 Emanuele Giaquinta |
498 |
* All rights reserved. |
499 |
* |
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* Redistribution and use in source and binary forms, with or without modifica- |
501 |
* tion, are permitted provided that the following conditions are met: |
502 |
* |
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* 1. Redistributions of source code must retain the above copyright notice, |
504 |
* 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 |
507 |
* notice, this list of conditions and the following disclaimer in the |
508 |
* 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 |
511 |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
512 |
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
513 |
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
514 |
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
515 |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
516 |
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
517 |
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
518 |
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
519 |
* OF THE POSSIBILITY OF SUCH DAMAGE. |
520 |
* |
521 |
* Alternatively, the contents of this file may be used under the terms of |
522 |
* the GNU General Public License ("GPL") version 2 or any later version, |
523 |
* in which case the provisions of the GPL are applicable instead of |
524 |
* the above. If you wish to allow the use of your version of this file |
525 |
* only under the terms of the GPL and not to allow others to use your |
526 |
* version of this file under the BSD license, indicate your decision |
527 |
* by deleting the provisions above and replace them with the notice |
528 |
* and other provisions required by the GPL. If you do not delete the |
529 |
* provisions above, a recipient may use your version of this file under |
530 |
* either the BSD or the GPL. |
531 |
*/ |
532 |
|
533 |
#ifndef ECB_H |
534 |
#define ECB_H |
535 |
|
536 |
/* 16 bits major, 16 bits minor */ |
537 |
#define ECB_VERSION 0x00010003 |
538 |
|
539 |
#ifdef _WIN32 |
540 |
typedef signed char int8_t; |
541 |
typedef unsigned char uint8_t; |
542 |
typedef signed short int16_t; |
543 |
typedef unsigned short uint16_t; |
544 |
typedef signed int int32_t; |
545 |
typedef unsigned int uint32_t; |
546 |
#if __GNUC__ |
547 |
typedef signed long long int64_t; |
548 |
typedef unsigned long long uint64_t; |
549 |
#else /* _MSC_VER || __BORLANDC__ */ |
550 |
typedef signed __int64 int64_t; |
551 |
typedef unsigned __int64 uint64_t; |
552 |
#endif |
553 |
#ifdef _WIN64 |
554 |
#define ECB_PTRSIZE 8 |
555 |
typedef uint64_t uintptr_t; |
556 |
typedef int64_t intptr_t; |
557 |
#else |
558 |
#define ECB_PTRSIZE 4 |
559 |
typedef uint32_t uintptr_t; |
560 |
typedef int32_t intptr_t; |
561 |
#endif |
562 |
#else |
563 |
#include <inttypes.h> |
564 |
#if UINTMAX_MAX > 0xffffffffU |
565 |
#define ECB_PTRSIZE 8 |
566 |
#else |
567 |
#define ECB_PTRSIZE 4 |
568 |
#endif |
569 |
#endif |
570 |
|
571 |
/* work around x32 idiocy by defining proper macros */ |
572 |
#if __amd64 || __x86_64 || _M_AMD64 || _M_X64 |
573 |
#if _ILP32 |
574 |
#define ECB_AMD64_X32 1 |
575 |
#else |
576 |
#define ECB_AMD64 1 |
577 |
#endif |
578 |
#endif |
579 |
|
580 |
/* many compilers define _GNUC_ to some versions but then only implement |
581 |
* what their idiot authors think are the "more important" extensions, |
582 |
* causing enormous grief in return for some better fake benchmark numbers. |
583 |
* or so. |
584 |
* we try to detect these and simply assume they are not gcc - if they have |
585 |
* an issue with that they should have done it right in the first place. |
586 |
*/ |
587 |
#ifndef ECB_GCC_VERSION |
588 |
#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
589 |
#define ECB_GCC_VERSION(major,minor) 0 |
590 |
#else |
591 |
#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
592 |
#endif |
593 |
#endif |
594 |
|
595 |
#define ECB_CPP (__cplusplus+0) |
596 |
#define ECB_CPP11 (__cplusplus >= 201103L) |
597 |
|
598 |
#if ECB_CPP |
599 |
#define ECB_C 0 |
600 |
#define ECB_STDC_VERSION 0 |
601 |
#else |
602 |
#define ECB_C 1 |
603 |
#define ECB_STDC_VERSION __STDC_VERSION__ |
604 |
#endif |
605 |
|
606 |
#define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
607 |
#define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
608 |
|
609 |
#if ECB_CPP |
610 |
#define ECB_EXTERN_C extern "C" |
611 |
#define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
612 |
#define ECB_EXTERN_C_END } |
613 |
#else |
614 |
#define ECB_EXTERN_C extern |
615 |
#define ECB_EXTERN_C_BEG |
616 |
#define ECB_EXTERN_C_END |
617 |
#endif |
618 |
|
619 |
/*****************************************************************************/ |
620 |
|
621 |
/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
622 |
/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
623 |
|
624 |
#if ECB_NO_THREADS |
625 |
#define ECB_NO_SMP 1 |
626 |
#endif |
627 |
|
628 |
#if ECB_NO_SMP |
629 |
#define ECB_MEMORY_FENCE do { } while (0) |
630 |
#endif |
631 |
|
632 |
#ifndef ECB_MEMORY_FENCE |
633 |
#if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
634 |
#if __i386 || __i386__ |
635 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
636 |
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
637 |
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
638 |
#elif __amd64 || __amd64__ || __x86_64 || __x86_64__ |
639 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
640 |
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
641 |
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
642 |
#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
643 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
644 |
#elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
645 |
|| defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
646 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
647 |
#elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
648 |
|| defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
649 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
650 |
#elif __aarch64__ |
651 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
652 |
#elif (__sparc || __sparc__) && !__sparcv8 |
653 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
654 |
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
655 |
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
656 |
#elif defined __s390__ || defined __s390x__ |
657 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
658 |
#elif defined __mips__ |
659 |
/* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
660 |
/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ |
661 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
662 |
#elif defined __alpha__ |
663 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
664 |
#elif defined __hppa__ |
665 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
666 |
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
667 |
#elif defined __ia64__ |
668 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
669 |
#elif defined __m68k__ |
670 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
671 |
#elif defined __m88k__ |
672 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
673 |
#elif defined __sh__ |
674 |
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
675 |
#endif |
676 |
#endif |
677 |
#endif |
678 |
|
679 |
#ifndef ECB_MEMORY_FENCE |
680 |
#if ECB_GCC_VERSION(4,7) |
681 |
/* see comment below (stdatomic.h) about the C11 memory model. */ |
682 |
#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
683 |
#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
684 |
#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
685 |
|
686 |
/* The __has_feature syntax from clang is so misdesigned that we cannot use it |
687 |
* without risking compile time errors with other compilers. We *could* |
688 |
* define our own ecb_clang_has_feature, but I just can't be bothered to work |
689 |
* around this shit time and again. |
690 |
* #elif defined __clang && __has_feature (cxx_atomic) |
691 |
* // see comment below (stdatomic.h) about the C11 memory model. |
692 |
* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
693 |
* #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
694 |
* #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
695 |
*/ |
696 |
|
697 |
#elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
698 |
#define ECB_MEMORY_FENCE __sync_synchronize () |
699 |
#elif _MSC_VER >= 1500 /* VC++ 2008 */ |
700 |
/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
701 |
#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
702 |
#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
703 |
#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
704 |
#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
705 |
#elif _MSC_VER >= 1400 /* VC++ 2005 */ |
706 |
#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
707 |
#define ECB_MEMORY_FENCE _ReadWriteBarrier () |
708 |
#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
709 |
#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
710 |
#elif defined _WIN32 |
711 |
#include <WinNT.h> |
712 |
#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
713 |
#elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
714 |
#include <mbarrier.h> |
715 |
#define ECB_MEMORY_FENCE __machine_rw_barrier () |
716 |
#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () |
717 |
#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () |
718 |
#elif __xlC__ |
719 |
#define ECB_MEMORY_FENCE __sync () |
720 |
#endif |
721 |
#endif |
722 |
|
723 |
#ifndef ECB_MEMORY_FENCE |
724 |
#if ECB_C11 && !defined __STDC_NO_ATOMICS__ |
725 |
/* we assume that these memory fences work on all variables/all memory accesses, */ |
726 |
/* not just C11 atomics and atomic accesses */ |
727 |
#include <stdatomic.h> |
728 |
/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */ |
729 |
/* any fence other than seq_cst, which isn't very efficient for us. */ |
730 |
/* Why that is, we don't know - either the C11 memory model is quite useless */ |
731 |
/* for most usages, or gcc and clang have a bug */ |
732 |
/* I *currently* lean towards the latter, and inefficiently implement */ |
733 |
/* all three of ecb's fences as a seq_cst fence */ |
734 |
/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
735 |
/* for all __atomic_thread_fence's except seq_cst */ |
736 |
#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
737 |
#endif |
738 |
#endif |
739 |
|
740 |
#ifndef ECB_MEMORY_FENCE |
741 |
#if !ECB_AVOID_PTHREADS |
742 |
/* |
743 |
* if you get undefined symbol references to pthread_mutex_lock, |
744 |
* or failure to find pthread.h, then you should implement |
745 |
* the ECB_MEMORY_FENCE operations for your cpu/compiler |
746 |
* OR provide pthread.h and link against the posix thread library |
747 |
* of your system. |
748 |
*/ |
749 |
#include <pthread.h> |
750 |
#define ECB_NEEDS_PTHREADS 1 |
751 |
#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
752 |
|
753 |
static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
754 |
#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
755 |
#endif |
756 |
#endif |
757 |
|
758 |
#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE |
759 |
#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
760 |
#endif |
761 |
|
762 |
#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE |
763 |
#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
764 |
#endif |
765 |
|
766 |
/*****************************************************************************/ |
767 |
|
768 |
#if __cplusplus |
769 |
#define ecb_inline static inline |
770 |
#elif ECB_GCC_VERSION(2,5) |
771 |
#define ecb_inline static __inline__ |
772 |
#elif ECB_C99 |
773 |
#define ecb_inline static inline |
774 |
#else |
775 |
#define ecb_inline static |
776 |
#endif |
777 |
|
778 |
#if ECB_GCC_VERSION(3,3) |
779 |
#define ecb_restrict __restrict__ |
780 |
#elif ECB_C99 |
781 |
#define ecb_restrict restrict |
782 |
#else |
783 |
#define ecb_restrict |
784 |
#endif |
785 |
|
786 |
typedef int ecb_bool; |
787 |
|
788 |
#define ECB_CONCAT_(a, b) a ## b |
789 |
#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
790 |
#define ECB_STRINGIFY_(a) # a |
791 |
#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
792 |
|
793 |
#define ecb_function_ ecb_inline |
794 |
|
795 |
#if ECB_GCC_VERSION(3,1) |
796 |
#define ecb_attribute(attrlist) __attribute__(attrlist) |
797 |
#define ecb_is_constant(expr) __builtin_constant_p (expr) |
798 |
#define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
799 |
#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
800 |
#else |
801 |
#define ecb_attribute(attrlist) |
802 |
|
803 |
/* possible C11 impl for integral types |
804 |
typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
805 |
#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ |
806 |
|
807 |
#define ecb_is_constant(expr) 0 |
808 |
#define ecb_expect(expr,value) (expr) |
809 |
#define ecb_prefetch(addr,rw,locality) |
810 |
#endif |
811 |
|
812 |
/* no emulation for ecb_decltype */ |
813 |
#if ECB_GCC_VERSION(4,5) |
814 |
#define ecb_decltype(x) __decltype(x) |
815 |
#elif ECB_GCC_VERSION(3,0) |
816 |
#define ecb_decltype(x) __typeof(x) |
817 |
#endif |
818 |
|
819 |
#if _MSC_VER >= 1300 |
820 |
#define ecb_deprecated __declspec(deprecated) |
821 |
#else |
822 |
#define ecb_deprecated ecb_attribute ((__deprecated__)) |
823 |
#endif |
824 |
|
825 |
#define ecb_noinline ecb_attribute ((__noinline__)) |
826 |
#define ecb_unused ecb_attribute ((__unused__)) |
827 |
#define ecb_const ecb_attribute ((__const__)) |
828 |
#define ecb_pure ecb_attribute ((__pure__)) |
829 |
|
830 |
/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ |
831 |
#if ECB_C11 |
832 |
#define ecb_noreturn _Noreturn |
833 |
#else |
834 |
#define ecb_noreturn ecb_attribute ((__noreturn__)) |
835 |
#endif |
836 |
|
837 |
#if ECB_GCC_VERSION(4,3) |
838 |
#define ecb_artificial ecb_attribute ((__artificial__)) |
839 |
#define ecb_hot ecb_attribute ((__hot__)) |
840 |
#define ecb_cold ecb_attribute ((__cold__)) |
841 |
#else |
842 |
#define ecb_artificial |
843 |
#define ecb_hot |
844 |
#define ecb_cold |
845 |
#endif |
846 |
|
847 |
/* put around conditional expressions if you are very sure that the */ |
848 |
/* expression is mostly true or mostly false. note that these return */ |
849 |
/* booleans, not the expression. */ |
850 |
#define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
851 |
#define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
852 |
/* for compatibility to the rest of the world */ |
853 |
#define ecb_likely(expr) ecb_expect_true (expr) |
854 |
#define ecb_unlikely(expr) ecb_expect_false (expr) |
855 |
|
856 |
/* count trailing zero bits and count # of one bits */ |
857 |
#if ECB_GCC_VERSION(3,4) |
858 |
/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
859 |
#define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
860 |
#define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
861 |
#define ecb_ctz32(x) __builtin_ctz (x) |
862 |
#define ecb_ctz64(x) __builtin_ctzll (x) |
863 |
#define ecb_popcount32(x) __builtin_popcount (x) |
864 |
/* no popcountll */ |
865 |
#else |
866 |
ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
867 |
ecb_function_ int |
868 |
ecb_ctz32 (uint32_t x) |
869 |
{ |
870 |
int r = 0; |
871 |
|
872 |
x &= ~x + 1; /* this isolates the lowest bit */ |
873 |
|
874 |
#if ECB_branchless_on_i386 |
875 |
r += !!(x & 0xaaaaaaaa) << 0; |
876 |
r += !!(x & 0xcccccccc) << 1; |
877 |
r += !!(x & 0xf0f0f0f0) << 2; |
878 |
r += !!(x & 0xff00ff00) << 3; |
879 |
r += !!(x & 0xffff0000) << 4; |
880 |
#else |
881 |
if (x & 0xaaaaaaaa) r += 1; |
882 |
if (x & 0xcccccccc) r += 2; |
883 |
if (x & 0xf0f0f0f0) r += 4; |
884 |
if (x & 0xff00ff00) r += 8; |
885 |
if (x & 0xffff0000) r += 16; |
886 |
#endif |
887 |
|
888 |
return r; |
889 |
} |
890 |
|
891 |
ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
892 |
ecb_function_ int |
893 |
ecb_ctz64 (uint64_t x) |
894 |
{ |
895 |
int shift = x & 0xffffffffU ? 0 : 32; |
896 |
return ecb_ctz32 (x >> shift) + shift; |
897 |
} |
898 |
|
899 |
ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
900 |
ecb_function_ int |
901 |
ecb_popcount32 (uint32_t x) |
902 |
{ |
903 |
x -= (x >> 1) & 0x55555555; |
904 |
x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
905 |
x = ((x >> 4) + x) & 0x0f0f0f0f; |
906 |
x *= 0x01010101; |
907 |
|
908 |
return x >> 24; |
909 |
} |
910 |
|
911 |
ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
912 |
ecb_function_ int ecb_ld32 (uint32_t x) |
913 |
{ |
914 |
int r = 0; |
915 |
|
916 |
if (x >> 16) { x >>= 16; r += 16; } |
917 |
if (x >> 8) { x >>= 8; r += 8; } |
918 |
if (x >> 4) { x >>= 4; r += 4; } |
919 |
if (x >> 2) { x >>= 2; r += 2; } |
920 |
if (x >> 1) { r += 1; } |
921 |
|
922 |
return r; |
923 |
} |
924 |
|
925 |
ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
926 |
ecb_function_ int ecb_ld64 (uint64_t x) |
927 |
{ |
928 |
int r = 0; |
929 |
|
930 |
if (x >> 32) { x >>= 32; r += 32; } |
931 |
|
932 |
return r + ecb_ld32 (x); |
933 |
} |
934 |
#endif |
935 |
|
936 |
ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; |
937 |
ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
938 |
ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; |
939 |
ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
940 |
|
941 |
ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
942 |
ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
943 |
{ |
944 |
return ( (x * 0x0802U & 0x22110U) |
945 |
| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
946 |
} |
947 |
|
948 |
ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; |
949 |
ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
950 |
{ |
951 |
x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
952 |
x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
953 |
x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
954 |
x = ( x >> 8 ) | ( x << 8); |
955 |
|
956 |
return x; |
957 |
} |
958 |
|
959 |
ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; |
960 |
ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
961 |
{ |
962 |
x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
963 |
x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
964 |
x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
965 |
x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
966 |
x = ( x >> 16 ) | ( x << 16); |
967 |
|
968 |
return x; |
969 |
} |
970 |
|
971 |
/* popcount64 is only available on 64 bit cpus as gcc builtin */ |
972 |
/* so for this version we are lazy */ |
973 |
ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
974 |
ecb_function_ int |
975 |
ecb_popcount64 (uint64_t x) |
976 |
{ |
977 |
return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
978 |
} |
979 |
|
980 |
ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
981 |
ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
982 |
ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
983 |
ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
984 |
ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
985 |
ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
986 |
ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
987 |
ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
988 |
|
989 |
ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
990 |
ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
991 |
ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
992 |
ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
993 |
ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
994 |
ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
995 |
ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
996 |
ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
997 |
|
998 |
#if ECB_GCC_VERSION(4,3) |
999 |
#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
1000 |
#define ecb_bswap32(x) __builtin_bswap32 (x) |
1001 |
#define ecb_bswap64(x) __builtin_bswap64 (x) |
1002 |
#else |
1003 |
ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
1004 |
ecb_function_ uint16_t |
1005 |
ecb_bswap16 (uint16_t x) |
1006 |
{ |
1007 |
return ecb_rotl16 (x, 8); |
1008 |
} |
1009 |
|
1010 |
ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
1011 |
ecb_function_ uint32_t |
1012 |
ecb_bswap32 (uint32_t x) |
1013 |
{ |
1014 |
return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
1015 |
} |
1016 |
|
1017 |
ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
1018 |
ecb_function_ uint64_t |
1019 |
ecb_bswap64 (uint64_t x) |
1020 |
{ |
1021 |
return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
1022 |
} |
1023 |
#endif |
1024 |
|
1025 |
#if ECB_GCC_VERSION(4,5) |
1026 |
#define ecb_unreachable() __builtin_unreachable () |
1027 |
#else |
1028 |
/* this seems to work fine, but gcc always emits a warning for it :/ */ |
1029 |
ecb_inline void ecb_unreachable (void) ecb_noreturn; |
1030 |
ecb_inline void ecb_unreachable (void) { } |
1031 |
#endif |
1032 |
|
1033 |
/* try to tell the compiler that some condition is definitely true */ |
1034 |
#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
1035 |
|
1036 |
ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
1037 |
ecb_inline unsigned char |
1038 |
ecb_byteorder_helper (void) |
1039 |
{ |
1040 |
/* the union code still generates code under pressure in gcc, */ |
1041 |
/* but less than using pointers, and always seems to */ |
1042 |
/* successfully return a constant. */ |
1043 |
/* the reason why we have this horrible preprocessor mess */ |
1044 |
/* is to avoid it in all cases, at least on common architectures */ |
1045 |
/* or when using a recent enough gcc version (>= 4.6) */ |
1046 |
#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 |
1047 |
return 0x44; |
1048 |
#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
1049 |
return 0x44; |
1050 |
#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
1051 |
return 0x11; |
1052 |
#else |
1053 |
union |
1054 |
{ |
1055 |
uint32_t i; |
1056 |
uint8_t c; |
1057 |
} u = { 0x11223344 }; |
1058 |
return u.c; |
1059 |
#endif |
1060 |
} |
1061 |
|
1062 |
ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
1063 |
ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
1064 |
ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
1065 |
ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
1066 |
|
1067 |
#if ECB_GCC_VERSION(3,0) || ECB_C99 |
1068 |
#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
1069 |
#else |
1070 |
#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
1071 |
#endif |
1072 |
|
1073 |
#if __cplusplus |
1074 |
template<typename T> |
1075 |
static inline T ecb_div_rd (T val, T div) |
1076 |
{ |
1077 |
return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
1078 |
} |
1079 |
template<typename T> |
1080 |
static inline T ecb_div_ru (T val, T div) |
1081 |
{ |
1082 |
return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; |
1083 |
} |
1084 |
#else |
1085 |
#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
1086 |
#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
1087 |
#endif |
1088 |
|
1089 |
#if ecb_cplusplus_does_not_suck |
1090 |
/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
1091 |
template<typename T, int N> |
1092 |
static inline int ecb_array_length (const T (&arr)[N]) |
1093 |
{ |
1094 |
return N; |
1095 |
} |
1096 |
#else |
1097 |
#define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
1098 |
#endif |
1099 |
|
1100 |
/*******************************************************************************/ |
1101 |
/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
1102 |
|
1103 |
/* basically, everything uses "ieee pure-endian" floating point numbers */ |
1104 |
/* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
1105 |
#if 0 \ |
1106 |
|| __i386 || __i386__ \ |
1107 |
|| __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
1108 |
|| __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
1109 |
|| defined __s390__ || defined __s390x__ \ |
1110 |
|| defined __mips__ \ |
1111 |
|| defined __alpha__ \ |
1112 |
|| defined __hppa__ \ |
1113 |
|| defined __ia64__ \ |
1114 |
|| defined __m68k__ \ |
1115 |
|| defined __m88k__ \ |
1116 |
|| defined __sh__ \ |
1117 |
|| defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ |
1118 |
|| (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
1119 |
|| defined __aarch64__ |
1120 |
#define ECB_STDFP 1 |
1121 |
#include <string.h> /* for memcpy */ |
1122 |
#else |
1123 |
#define ECB_STDFP 0 |
1124 |
#endif |
1125 |
|
1126 |
#ifndef ECB_NO_LIBM |
1127 |
|
1128 |
#include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
1129 |
|
1130 |
/* only the oldest of old doesn't have this one. solaris. */ |
1131 |
#ifdef INFINITY |
1132 |
#define ECB_INFINITY INFINITY |
1133 |
#else |
1134 |
#define ECB_INFINITY HUGE_VAL |
1135 |
#endif |
1136 |
|
1137 |
#ifdef NAN |
1138 |
#define ECB_NAN NAN |
1139 |
#else |
1140 |
#define ECB_NAN ECB_INFINITY |
1141 |
#endif |
1142 |
|
1143 |
/* converts an ieee half/binary16 to a float */ |
1144 |
ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
1145 |
ecb_function_ float |
1146 |
ecb_binary16_to_float (uint16_t x) |
1147 |
{ |
1148 |
int e = (x >> 10) & 0x1f; |
1149 |
int m = x & 0x3ff; |
1150 |
float r; |
1151 |
|
1152 |
if (!e ) r = ldexpf (m , -24); |
1153 |
else if (e != 31) r = ldexpf (m + 0x400, e - 25); |
1154 |
else if (m ) r = ECB_NAN; |
1155 |
else r = ECB_INFINITY; |
1156 |
|
1157 |
return x & 0x8000 ? -r : r; |
1158 |
} |
1159 |
|
1160 |
/* convert a float to ieee single/binary32 */ |
1161 |
ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
1162 |
ecb_function_ uint32_t |
1163 |
ecb_float_to_binary32 (float x) |
1164 |
{ |
1165 |
uint32_t r; |
1166 |
|
1167 |
#if ECB_STDFP |
1168 |
memcpy (&r, &x, 4); |
1169 |
#else |
1170 |
/* slow emulation, works for anything but -0 */ |
1171 |
uint32_t m; |
1172 |
int e; |
1173 |
|
1174 |
if (x == 0e0f ) return 0x00000000U; |
1175 |
if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
1176 |
if (x < -3.40282346638528860e+38f) return 0xff800000U; |
1177 |
if (x != x ) return 0x7fbfffffU; |
1178 |
|
1179 |
m = frexpf (x, &e) * 0x1000000U; |
1180 |
|
1181 |
r = m & 0x80000000U; |
1182 |
|
1183 |
if (r) |
1184 |
m = -m; |
1185 |
|
1186 |
if (e <= -126) |
1187 |
{ |
1188 |
m &= 0xffffffU; |
1189 |
m >>= (-125 - e); |
1190 |
e = -126; |
1191 |
} |
1192 |
|
1193 |
r |= (e + 126) << 23; |
1194 |
r |= m & 0x7fffffU; |
1195 |
#endif |
1196 |
|
1197 |
return r; |
1198 |
} |
1199 |
|
1200 |
/* converts an ieee single/binary32 to a float */ |
1201 |
ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; |
1202 |
ecb_function_ float |
1203 |
ecb_binary32_to_float (uint32_t x) |
1204 |
{ |
1205 |
float r; |
1206 |
|
1207 |
#if ECB_STDFP |
1208 |
memcpy (&r, &x, 4); |
1209 |
#else |
1210 |
/* emulation, only works for normals and subnormals and +0 */ |
1211 |
int neg = x >> 31; |
1212 |
int e = (x >> 23) & 0xffU; |
1213 |
|
1214 |
x &= 0x7fffffU; |
1215 |
|
1216 |
if (e) |
1217 |
x |= 0x800000U; |
1218 |
else |
1219 |
e = 1; |
1220 |
|
1221 |
/* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
1222 |
r = ldexpf (x * (0.5f / 0x800000U), e - 126); |
1223 |
|
1224 |
r = neg ? -r : r; |
1225 |
#endif |
1226 |
|
1227 |
return r; |
1228 |
} |
1229 |
|
1230 |
/* convert a double to ieee double/binary64 */ |
1231 |
ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; |
1232 |
ecb_function_ uint64_t |
1233 |
ecb_double_to_binary64 (double x) |
1234 |
{ |
1235 |
uint64_t r; |
1236 |
|
1237 |
#if ECB_STDFP |
1238 |
memcpy (&r, &x, 8); |
1239 |
#else |
1240 |
/* slow emulation, works for anything but -0 */ |
1241 |
uint64_t m; |
1242 |
int e; |
1243 |
|
1244 |
if (x == 0e0 ) return 0x0000000000000000U; |
1245 |
if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; |
1246 |
if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; |
1247 |
if (x != x ) return 0X7ff7ffffffffffffU; |
1248 |
|
1249 |
m = frexp (x, &e) * 0x20000000000000U; |
1250 |
|
1251 |
r = m & 0x8000000000000000;; |
1252 |
|
1253 |
if (r) |
1254 |
m = -m; |
1255 |
|
1256 |
if (e <= -1022) |
1257 |
{ |
1258 |
m &= 0x1fffffffffffffU; |
1259 |
m >>= (-1021 - e); |
1260 |
e = -1022; |
1261 |
} |
1262 |
|
1263 |
r |= ((uint64_t)(e + 1022)) << 52; |
1264 |
r |= m & 0xfffffffffffffU; |
1265 |
#endif |
1266 |
|
1267 |
return r; |
1268 |
} |
1269 |
|
1270 |
/* converts an ieee double/binary64 to a double */ |
1271 |
ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; |
1272 |
ecb_function_ double |
1273 |
ecb_binary64_to_double (uint64_t x) |
1274 |
{ |
1275 |
double r; |
1276 |
|
1277 |
#if ECB_STDFP |
1278 |
memcpy (&r, &x, 8); |
1279 |
#else |
1280 |
/* emulation, only works for normals and subnormals and +0 */ |
1281 |
int neg = x >> 63; |
1282 |
int e = (x >> 52) & 0x7ffU; |
1283 |
|
1284 |
x &= 0xfffffffffffffU; |
1285 |
|
1286 |
if (e) |
1287 |
x |= 0x10000000000000U; |
1288 |
else |
1289 |
e = 1; |
1290 |
|
1291 |
/* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ |
1292 |
r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); |
1293 |
|
1294 |
r = neg ? -r : r; |
1295 |
#endif |
1296 |
|
1297 |
return r; |
1298 |
} |
1299 |
|
1300 |
#endif |
1301 |
|
1302 |
#endif |
1303 |
|
1304 |
/* ECB.H END */ |
1305 |
|
1306 |
#if ECB_MEMORY_FENCE_NEEDS_PTHREADS |
1307 |
/* if your architecture doesn't need memory fences, e.g. because it is |
1308 |
* single-cpu/core, or if you use libev in a project that doesn't use libev |
1309 |
* from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling |
1310 |
* libev, in which cases the memory fences become nops. |
1311 |
* alternatively, you can remove this #error and link against libpthread, |
1312 |
* which will then provide the memory fences. |
1313 |
*/ |
1314 |
# error "memory fences not defined for your architecture, please report" |
1315 |
#endif |
1316 |
|
1317 |
#ifndef ECB_MEMORY_FENCE |
1318 |
# define ECB_MEMORY_FENCE do { } while (0) |
1319 |
# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
1320 |
# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
1321 |
#endif |
1322 |
|
1323 |
#define expect_false(cond) ecb_expect_false (cond) |
1324 |
#define expect_true(cond) ecb_expect_true (cond) |
1325 |
#define noinline ecb_noinline |
1326 |
|
1327 |
#define inline_size ecb_inline |
1328 |
|
1329 |
#if EV_FEATURE_CODE |
1330 |
# define inline_speed ecb_inline |
1331 |
#else |
1332 |
# define inline_speed static noinline |
1333 |
#endif |
1334 |
|
1335 |
#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
1336 |
|
1337 |
#if EV_MINPRI == EV_MAXPRI |
1338 |
# define ABSPRI(w) (((W)w), 0) |
1339 |
#else |
1340 |
# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
1341 |
#endif |
1342 |
|
1343 |
#define EMPTY /* required for microsofts broken pseudo-c compiler */ |
1344 |
#define EMPTY2(a,b) /* used to suppress some warnings */ |
1345 |
|
1346 |
typedef ev_watcher *W; |
1347 |
typedef ev_watcher_list *WL; |
1348 |
typedef ev_watcher_time *WT; |
1349 |
|
1350 |
#define ev_active(w) ((W)(w))->active |
1351 |
#define ev_at(w) ((WT)(w))->at |
1352 |
|
1353 |
#if EV_USE_REALTIME |
1354 |
/* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
1355 |
/* giving it a reasonably high chance of working on typical architectures */ |
1356 |
static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
1357 |
#endif |
1358 |
|
1359 |
#if EV_USE_MONOTONIC |
1360 |
static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
1361 |
#endif |
1362 |
|
1363 |
#ifndef EV_FD_TO_WIN32_HANDLE |
1364 |
# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
1365 |
#endif |
1366 |
#ifndef EV_WIN32_HANDLE_TO_FD |
1367 |
# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
1368 |
#endif |
1369 |
#ifndef EV_WIN32_CLOSE_FD |
1370 |
# define EV_WIN32_CLOSE_FD(fd) close (fd) |
1371 |
#endif |
1372 |
|
1373 |
#ifdef _WIN32 |
1374 |
# include "ev_win32.c" |
1375 |
#endif |
1376 |
|
1377 |
/*****************************************************************************/ |
1378 |
|
1379 |
/* define a suitable floor function (only used by periodics atm) */ |
1380 |
|
1381 |
#if EV_USE_FLOOR |
1382 |
# include <math.h> |
1383 |
# define ev_floor(v) floor (v) |
1384 |
#else |
1385 |
|
1386 |
#include <float.h> |
1387 |
|
1388 |
/* a floor() replacement function, should be independent of ev_tstamp type */ |
1389 |
static ev_tstamp noinline |
1390 |
ev_floor (ev_tstamp v) |
1391 |
{ |
1392 |
/* the choice of shift factor is not terribly important */ |
1393 |
#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ |
1394 |
const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; |
1395 |
#else |
1396 |
const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; |
1397 |
#endif |
1398 |
|
1399 |
/* argument too large for an unsigned long? */ |
1400 |
if (expect_false (v >= shift)) |
1401 |
{ |
1402 |
ev_tstamp f; |
1403 |
|
1404 |
if (v == v - 1.) |
1405 |
return v; /* very large number */ |
1406 |
|
1407 |
f = shift * ev_floor (v * (1. / shift)); |
1408 |
return f + ev_floor (v - f); |
1409 |
} |
1410 |
|
1411 |
/* special treatment for negative args? */ |
1412 |
if (expect_false (v < 0.)) |
1413 |
{ |
1414 |
ev_tstamp f = -ev_floor (-v); |
1415 |
|
1416 |
return f - (f == v ? 0 : 1); |
1417 |
} |
1418 |
|
1419 |
/* fits into an unsigned long */ |
1420 |
return (unsigned long)v; |
1421 |
} |
1422 |
|
1423 |
#endif |
1424 |
|
1425 |
/*****************************************************************************/ |
1426 |
|
1427 |
#ifdef __linux |
1428 |
# include <sys/utsname.h> |
1429 |
#endif |
1430 |
|
1431 |
static unsigned int noinline ecb_cold |
1432 |
ev_linux_version (void) |
1433 |
{ |
1434 |
#ifdef __linux |
1435 |
unsigned int v = 0; |
1436 |
struct utsname buf; |
1437 |
int i; |
1438 |
char *p = buf.release; |
1439 |
|
1440 |
if (uname (&buf)) |
1441 |
return 0; |
1442 |
|
1443 |
for (i = 3+1; --i; ) |
1444 |
{ |
1445 |
unsigned int c = 0; |
1446 |
|
1447 |
for (;;) |
1448 |
{ |
1449 |
if (*p >= '0' && *p <= '9') |
1450 |
c = c * 10 + *p++ - '0'; |
1451 |
else |
1452 |
{ |
1453 |
p += *p == '.'; |
1454 |
break; |
1455 |
} |
1456 |
} |
1457 |
|
1458 |
v = (v << 8) | c; |
1459 |
} |
1460 |
|
1461 |
return v; |
1462 |
#else |
1463 |
return 0; |
1464 |
#endif |
1465 |
} |
1466 |
|
1467 |
/*****************************************************************************/ |
1468 |
|
1469 |
#if EV_AVOID_STDIO |
1470 |
static void noinline ecb_cold |
1471 |
ev_printerr (const char *msg) |
1472 |
{ |
1473 |
write (STDERR_FILENO, msg, strlen (msg)); |
1474 |
} |
1475 |
#endif |
1476 |
|
1477 |
static void (*syserr_cb)(const char *msg) EV_THROW; |
1478 |
|
1479 |
void ecb_cold |
1480 |
ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW |
1481 |
{ |
1482 |
syserr_cb = cb; |
1483 |
} |
1484 |
|
1485 |
static void noinline ecb_cold |
1486 |
ev_syserr (const char *msg) |
1487 |
{ |
1488 |
if (!msg) |
1489 |
msg = "(libev) system error"; |
1490 |
|
1491 |
if (syserr_cb) |
1492 |
syserr_cb (msg); |
1493 |
else |
1494 |
{ |
1495 |
#if EV_AVOID_STDIO |
1496 |
ev_printerr (msg); |
1497 |
ev_printerr (": "); |
1498 |
ev_printerr (strerror (errno)); |
1499 |
ev_printerr ("\n"); |
1500 |
#else |
1501 |
perror (msg); |
1502 |
#endif |
1503 |
abort (); |
1504 |
} |
1505 |
} |
1506 |
|
1507 |
static void * |
1508 |
ev_realloc_emul (void *ptr, long size) EV_THROW |
1509 |
{ |
1510 |
/* some systems, notably openbsd and darwin, fail to properly |
1511 |
* implement realloc (x, 0) (as required by both ansi c-89 and |
1512 |
* the single unix specification, so work around them here. |
1513 |
* recently, also (at least) fedora and debian started breaking it, |
1514 |
* despite documenting it otherwise. |
1515 |
*/ |
1516 |
|
1517 |
if (size) |
1518 |
return realloc (ptr, size); |
1519 |
|
1520 |
free (ptr); |
1521 |
return 0; |
1522 |
} |
1523 |
|
1524 |
static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul; |
1525 |
|
1526 |
void ecb_cold |
1527 |
ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW |
1528 |
{ |
1529 |
alloc = cb; |
1530 |
} |
1531 |
|
1532 |
inline_speed void * |
1533 |
ev_realloc (void *ptr, long size) |
1534 |
{ |
1535 |
ptr = alloc (ptr, size); |
1536 |
|
1537 |
if (!ptr && size) |
1538 |
{ |
1539 |
#if EV_AVOID_STDIO |
1540 |
ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
1541 |
#else |
1542 |
fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
1543 |
#endif |
1544 |
abort (); |
1545 |
} |
1546 |
|
1547 |
return ptr; |
1548 |
} |
1549 |
|
1550 |
#define ev_malloc(size) ev_realloc (0, (size)) |
1551 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
1552 |
|
1553 |
/*****************************************************************************/ |
1554 |
|
1555 |
/* set in reify when reification needed */ |
1556 |
#define EV_ANFD_REIFY 1 |
1557 |
|
1558 |
/* file descriptor info structure */ |
1559 |
typedef struct |
1560 |
{ |
1561 |
WL head; |
1562 |
unsigned char events; /* the events watched for */ |
1563 |
unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ |
1564 |
unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ |
1565 |
unsigned char unused; |
1566 |
#if EV_USE_EPOLL |
1567 |
unsigned int egen; /* generation counter to counter epoll bugs */ |
1568 |
#endif |
1569 |
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
1570 |
SOCKET handle; |
1571 |
#endif |
1572 |
#if EV_USE_IOCP |
1573 |
OVERLAPPED or, ow; |
1574 |
#endif |
1575 |
} ANFD; |
1576 |
|
1577 |
/* stores the pending event set for a given watcher */ |
1578 |
typedef struct |
1579 |
{ |
1580 |
W w; |
1581 |
int events; /* the pending event set for the given watcher */ |
1582 |
} ANPENDING; |
1583 |
|
1584 |
#if EV_USE_INOTIFY |
1585 |
/* hash table entry per inotify-id */ |
1586 |
typedef struct |
1587 |
{ |
1588 |
WL head; |
1589 |
} ANFS; |
1590 |
#endif |
1591 |
|
1592 |
/* Heap Entry */ |
1593 |
#if EV_HEAP_CACHE_AT |
1594 |
/* a heap element */ |
1595 |
typedef struct { |
1596 |
ev_tstamp at; |
1597 |
WT w; |
1598 |
} ANHE; |
1599 |
|
1600 |
#define ANHE_w(he) (he).w /* access watcher, read-write */ |
1601 |
#define ANHE_at(he) (he).at /* access cached at, read-only */ |
1602 |
#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ |
1603 |
#else |
1604 |
/* a heap element */ |
1605 |
typedef WT ANHE; |
1606 |
|
1607 |
#define ANHE_w(he) (he) |
1608 |
#define ANHE_at(he) (he)->at |
1609 |
#define ANHE_at_cache(he) |
1610 |
#endif |
1611 |
|
1612 |
#if EV_MULTIPLICITY |
1613 |
|
1614 |
struct ev_loop |
1615 |
{ |
1616 |
ev_tstamp ev_rt_now; |
1617 |
#define ev_rt_now ((loop)->ev_rt_now) |
1618 |
#define VAR(name,decl) decl; |
1619 |
#include "ev_vars.h" |
1620 |
#undef VAR |
1621 |
}; |
1622 |
#include "ev_wrap.h" |
1623 |
|
1624 |
static struct ev_loop default_loop_struct; |
1625 |
EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */ |
1626 |
|
1627 |
#else |
1628 |
|
1629 |
EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */ |
1630 |
#define VAR(name,decl) static decl; |
1631 |
#include "ev_vars.h" |
1632 |
#undef VAR |
1633 |
|
1634 |
static int ev_default_loop_ptr; |
1635 |
|
1636 |
#endif |
1637 |
|
1638 |
#if EV_FEATURE_API |
1639 |
# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) |
1640 |
# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) |
1641 |
# define EV_INVOKE_PENDING invoke_cb (EV_A) |
1642 |
#else |
1643 |
# define EV_RELEASE_CB (void)0 |
1644 |
# define EV_ACQUIRE_CB (void)0 |
1645 |
# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) |
1646 |
#endif |
1647 |
|
1648 |
#define EVBREAK_RECURSE 0x80 |
1649 |
|
1650 |
/*****************************************************************************/ |
1651 |
|
1652 |
#ifndef EV_HAVE_EV_TIME |
1653 |
ev_tstamp |
1654 |
ev_time (void) EV_THROW |
1655 |
{ |
1656 |
#if EV_USE_REALTIME |
1657 |
if (expect_true (have_realtime)) |
1658 |
{ |
1659 |
struct timespec ts; |
1660 |
clock_gettime (CLOCK_REALTIME, &ts); |
1661 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
1662 |
} |
1663 |
#endif |
1664 |
|
1665 |
struct timeval tv; |
1666 |
gettimeofday (&tv, 0); |
1667 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
1668 |
} |
1669 |
#endif |
1670 |
|
1671 |
inline_size ev_tstamp |
1672 |
get_clock (void) |
1673 |
{ |
1674 |
#if EV_USE_MONOTONIC |
1675 |
if (expect_true (have_monotonic)) |
1676 |
{ |
1677 |
struct timespec ts; |
1678 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
1679 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
1680 |
} |
1681 |
#endif |
1682 |
|
1683 |
return ev_time (); |
1684 |
} |
1685 |
|
1686 |
#if EV_MULTIPLICITY |
1687 |
ev_tstamp |
1688 |
ev_now (EV_P) EV_THROW |
1689 |
{ |
1690 |
return ev_rt_now; |
1691 |
} |
1692 |
#endif |
1693 |
|
1694 |
void |
1695 |
ev_sleep (ev_tstamp delay) EV_THROW |
1696 |
{ |
1697 |
if (delay > 0.) |
1698 |
{ |
1699 |
#if EV_USE_NANOSLEEP |
1700 |
struct timespec ts; |
1701 |
|
1702 |
EV_TS_SET (ts, delay); |
1703 |
nanosleep (&ts, 0); |
1704 |
#elif defined _WIN32 |
1705 |
Sleep ((unsigned long)(delay * 1e3)); |
1706 |
#else |
1707 |
struct timeval tv; |
1708 |
|
1709 |
/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ |
1710 |
/* something not guaranteed by newer posix versions, but guaranteed */ |
1711 |
/* by older ones */ |
1712 |
EV_TV_SET (tv, delay); |
1713 |
select (0, 0, 0, 0, &tv); |
1714 |
#endif |
1715 |
} |
1716 |
} |
1717 |
|
1718 |
/*****************************************************************************/ |
1719 |
|
1720 |
#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
1721 |
|
1722 |
/* find a suitable new size for the given array, */ |
1723 |
/* hopefully by rounding to a nice-to-malloc size */ |
1724 |
inline_size int |
1725 |
array_nextsize (int elem, int cur, int cnt) |
1726 |
{ |
1727 |
int ncur = cur + 1; |
1728 |
|
1729 |
do |
1730 |
ncur <<= 1; |
1731 |
while (cnt > ncur); |
1732 |
|
1733 |
/* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */ |
1734 |
if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) |
1735 |
{ |
1736 |
ncur *= elem; |
1737 |
ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); |
1738 |
ncur = ncur - sizeof (void *) * 4; |
1739 |
ncur /= elem; |
1740 |
} |
1741 |
|
1742 |
return ncur; |
1743 |
} |
1744 |
|
1745 |
static void * noinline ecb_cold |
1746 |
array_realloc (int elem, void *base, int *cur, int cnt) |
1747 |
{ |
1748 |
*cur = array_nextsize (elem, *cur, cnt); |
1749 |
return ev_realloc (base, elem * *cur); |
1750 |
} |
1751 |
|
1752 |
#define array_init_zero(base,count) \ |
1753 |
memset ((void *)(base), 0, sizeof (*(base)) * (count)) |
1754 |
|
1755 |
#define array_needsize(type,base,cur,cnt,init) \ |
1756 |
if (expect_false ((cnt) > (cur))) \ |
1757 |
{ \ |
1758 |
int ecb_unused ocur_ = (cur); \ |
1759 |
(base) = (type *)array_realloc \ |
1760 |
(sizeof (type), (base), &(cur), (cnt)); \ |
1761 |
init ((base) + (ocur_), (cur) - ocur_); \ |
1762 |
} |
1763 |
|
1764 |
#if 0 |
1765 |
#define array_slim(type,stem) \ |
1766 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
1767 |
{ \ |
1768 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
1769 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
1770 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
1771 |
} |
1772 |
#endif |
1773 |
|
1774 |
#define array_free(stem, idx) \ |
1775 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 |
1776 |
|
1777 |
/*****************************************************************************/ |
1778 |
|
1779 |
/* dummy callback for pending events */ |
1780 |
static void noinline |
1781 |
pendingcb (EV_P_ ev_prepare *w, int revents) |
1782 |
{ |
1783 |
} |
1784 |
|
1785 |
void noinline |
1786 |
ev_feed_event (EV_P_ void *w, int revents) EV_THROW |
1787 |
{ |
1788 |
W w_ = (W)w; |
1789 |
int pri = ABSPRI (w_); |
1790 |
|
1791 |
if (expect_false (w_->pending)) |
1792 |
pendings [pri][w_->pending - 1].events |= revents; |
1793 |
else |
1794 |
{ |
1795 |
w_->pending = ++pendingcnt [pri]; |
1796 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
1797 |
pendings [pri][w_->pending - 1].w = w_; |
1798 |
pendings [pri][w_->pending - 1].events = revents; |
1799 |
} |
1800 |
|
1801 |
pendingpri = NUMPRI - 1; |
1802 |
} |
1803 |
|
1804 |
inline_speed void |
1805 |
feed_reverse (EV_P_ W w) |
1806 |
{ |
1807 |
array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); |
1808 |
rfeeds [rfeedcnt++] = w; |
1809 |
} |
1810 |
|
1811 |
inline_size void |
1812 |
feed_reverse_done (EV_P_ int revents) |
1813 |
{ |
1814 |
do |
1815 |
ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); |
1816 |
while (rfeedcnt); |
1817 |
} |
1818 |
|
1819 |
inline_speed void |
1820 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
1821 |
{ |
1822 |
int i; |
1823 |
|
1824 |
for (i = 0; i < eventcnt; ++i) |
1825 |
ev_feed_event (EV_A_ events [i], type); |
1826 |
} |
1827 |
|
1828 |
/*****************************************************************************/ |
1829 |
|
1830 |
inline_speed void |
1831 |
fd_event_nocheck (EV_P_ int fd, int revents) |
1832 |
{ |
1833 |
ANFD *anfd = anfds + fd; |
1834 |
ev_io *w; |
1835 |
|
1836 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
1837 |
{ |
1838 |
int ev = w->events & revents; |
1839 |
|
1840 |
if (ev) |
1841 |
ev_feed_event (EV_A_ (W)w, ev); |
1842 |
} |
1843 |
} |
1844 |
|
1845 |
/* do not submit kernel events for fds that have reify set */ |
1846 |
/* because that means they changed while we were polling for new events */ |
1847 |
inline_speed void |
1848 |
fd_event (EV_P_ int fd, int revents) |
1849 |
{ |
1850 |
ANFD *anfd = anfds + fd; |
1851 |
|
1852 |
if (expect_true (!anfd->reify)) |
1853 |
fd_event_nocheck (EV_A_ fd, revents); |
1854 |
} |
1855 |
|
1856 |
void |
1857 |
ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW |
1858 |
{ |
1859 |
if (fd >= 0 && fd < anfdmax) |
1860 |
fd_event_nocheck (EV_A_ fd, revents); |
1861 |
} |
1862 |
|
1863 |
/* make sure the external fd watch events are in-sync */ |
1864 |
/* with the kernel/libev internal state */ |
1865 |
inline_size void |
1866 |
fd_reify (EV_P) |
1867 |
{ |
1868 |
int i; |
1869 |
|
1870 |
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
1871 |
for (i = 0; i < fdchangecnt; ++i) |
1872 |
{ |
1873 |
int fd = fdchanges [i]; |
1874 |
ANFD *anfd = anfds + fd; |
1875 |
|
1876 |
if (anfd->reify & EV__IOFDSET && anfd->head) |
1877 |
{ |
1878 |
SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); |
1879 |
|
1880 |
if (handle != anfd->handle) |
1881 |
{ |
1882 |
unsigned long arg; |
1883 |
|
1884 |
assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0)); |
1885 |
|
1886 |
/* handle changed, but fd didn't - we need to do it in two steps */ |
1887 |
backend_modify (EV_A_ fd, anfd->events, 0); |
1888 |
anfd->events = 0; |
1889 |
anfd->handle = handle; |
1890 |
} |
1891 |
} |
1892 |
} |
1893 |
#endif |
1894 |
|
1895 |
for (i = 0; i < fdchangecnt; ++i) |
1896 |
{ |
1897 |
int fd = fdchanges [i]; |
1898 |
ANFD *anfd = anfds + fd; |
1899 |
ev_io *w; |
1900 |
|
1901 |
unsigned char o_events = anfd->events; |
1902 |
unsigned char o_reify = anfd->reify; |
1903 |
|
1904 |
anfd->reify = 0; |
1905 |
|
1906 |
/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ |
1907 |
{ |
1908 |
anfd->events = 0; |
1909 |
|
1910 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
1911 |
anfd->events |= (unsigned char)w->events; |
1912 |
|
1913 |
if (o_events != anfd->events) |
1914 |
o_reify = EV__IOFDSET; /* actually |= */ |
1915 |
} |
1916 |
|
1917 |
if (o_reify & EV__IOFDSET) |
1918 |
backend_modify (EV_A_ fd, o_events, anfd->events); |
1919 |
} |
1920 |
|
1921 |
fdchangecnt = 0; |
1922 |
} |
1923 |
|
1924 |
/* something about the given fd changed */ |
1925 |
inline_size void |
1926 |
fd_change (EV_P_ int fd, int flags) |
1927 |
{ |
1928 |
unsigned char reify = anfds [fd].reify; |
1929 |
anfds [fd].reify |= flags; |
1930 |
|
1931 |
if (expect_true (!reify)) |
1932 |
{ |
1933 |
++fdchangecnt; |
1934 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
1935 |
fdchanges [fdchangecnt - 1] = fd; |
1936 |
} |
1937 |
} |
1938 |
|
1939 |
/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ |
1940 |
inline_speed void ecb_cold |
1941 |
fd_kill (EV_P_ int fd) |
1942 |
{ |
1943 |
ev_io *w; |
1944 |
|
1945 |
while ((w = (ev_io *)anfds [fd].head)) |
1946 |
{ |
1947 |
ev_io_stop (EV_A_ w); |
1948 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
1949 |
} |
1950 |
} |
1951 |
|
1952 |
/* check whether the given fd is actually valid, for error recovery */ |
1953 |
inline_size int ecb_cold |
1954 |
fd_valid (int fd) |
1955 |
{ |
1956 |
#ifdef _WIN32 |
1957 |
return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
1958 |
#else |
1959 |
return fcntl (fd, F_GETFD) != -1; |
1960 |
#endif |
1961 |
} |
1962 |
|
1963 |
/* called on EBADF to verify fds */ |
1964 |
static void noinline ecb_cold |
1965 |
fd_ebadf (EV_P) |
1966 |
{ |
1967 |
int fd; |
1968 |
|
1969 |
for (fd = 0; fd < anfdmax; ++fd) |
1970 |
if (anfds [fd].events) |
1971 |
if (!fd_valid (fd) && errno == EBADF) |
1972 |
fd_kill (EV_A_ fd); |
1973 |
} |
1974 |
|
1975 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
1976 |
static void noinline ecb_cold |
1977 |
fd_enomem (EV_P) |
1978 |
{ |
1979 |
int fd; |
1980 |
|
1981 |
for (fd = anfdmax; fd--; ) |
1982 |
if (anfds [fd].events) |
1983 |
{ |
1984 |
fd_kill (EV_A_ fd); |
1985 |
break; |
1986 |
} |
1987 |
} |
1988 |
|
1989 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
1990 |
static void noinline |
1991 |
fd_rearm_all (EV_P) |
1992 |
{ |
1993 |
int fd; |
1994 |
|
1995 |
for (fd = 0; fd < anfdmax; ++fd) |
1996 |
if (anfds [fd].events) |
1997 |
{ |
1998 |
anfds [fd].events = 0; |
1999 |
anfds [fd].emask = 0; |
2000 |
fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); |
2001 |
} |
2002 |
} |
2003 |
|
2004 |
/* used to prepare libev internal fd's */ |
2005 |
/* this is not fork-safe */ |
2006 |
inline_speed void |
2007 |
fd_intern (int fd) |
2008 |
{ |
2009 |
#ifdef _WIN32 |
2010 |
unsigned long arg = 1; |
2011 |
ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
2012 |
#else |
2013 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
2014 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
2015 |
#endif |
2016 |
} |
2017 |
|
2018 |
/*****************************************************************************/ |
2019 |
|
2020 |
/* |
2021 |
* the heap functions want a real array index. array index 0 is guaranteed to not |
2022 |
* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives |
2023 |
* the branching factor of the d-tree. |
2024 |
*/ |
2025 |
|
2026 |
/* |
2027 |
* at the moment we allow libev the luxury of two heaps, |
2028 |
* a small-code-size 2-heap one and a ~1.5kb larger 4-heap |
2029 |
* which is more cache-efficient. |
2030 |
* the difference is about 5% with 50000+ watchers. |
2031 |
*/ |
2032 |
#if EV_USE_4HEAP |
2033 |
|
2034 |
#define DHEAP 4 |
2035 |
#define HEAP0 (DHEAP - 1) /* index of first element in heap */ |
2036 |
#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) |
2037 |
#define UPHEAP_DONE(p,k) ((p) == (k)) |
2038 |
|
2039 |
/* away from the root */ |
2040 |
inline_speed void |
2041 |
downheap (ANHE *heap, int N, int k) |
2042 |
{ |
2043 |
ANHE he = heap [k]; |
2044 |
ANHE *E = heap + N + HEAP0; |
2045 |
|
2046 |
for (;;) |
2047 |
{ |
2048 |
ev_tstamp minat; |
2049 |
ANHE *minpos; |
2050 |
ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; |
2051 |
|
2052 |
/* find minimum child */ |
2053 |
if (expect_true (pos + DHEAP - 1 < E)) |
2054 |
{ |
2055 |
/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
2056 |
if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
2057 |
if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
2058 |
if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
2059 |
} |
2060 |
else if (pos < E) |
2061 |
{ |
2062 |
/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
2063 |
if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
2064 |
if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
2065 |
if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
2066 |
} |
2067 |
else |
2068 |
break; |
2069 |
|
2070 |
if (ANHE_at (he) <= minat) |
2071 |
break; |
2072 |
|
2073 |
heap [k] = *minpos; |
2074 |
ev_active (ANHE_w (*minpos)) = k; |
2075 |
|
2076 |
k = minpos - heap; |
2077 |
} |
2078 |
|
2079 |
heap [k] = he; |
2080 |
ev_active (ANHE_w (he)) = k; |
2081 |
} |
2082 |
|
2083 |
#else /* 4HEAP */ |
2084 |
|
2085 |
#define HEAP0 1 |
2086 |
#define HPARENT(k) ((k) >> 1) |
2087 |
#define UPHEAP_DONE(p,k) (!(p)) |
2088 |
|
2089 |
/* away from the root */ |
2090 |
inline_speed void |
2091 |
downheap (ANHE *heap, int N, int k) |
2092 |
{ |
2093 |
ANHE he = heap [k]; |
2094 |
|
2095 |
for (;;) |
2096 |
{ |
2097 |
int c = k << 1; |
2098 |
|
2099 |
if (c >= N + HEAP0) |
2100 |
break; |
2101 |
|
2102 |
c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) |
2103 |
? 1 : 0; |
2104 |
|
2105 |
if (ANHE_at (he) <= ANHE_at (heap [c])) |
2106 |
break; |
2107 |
|
2108 |
heap [k] = heap [c]; |
2109 |
ev_active (ANHE_w (heap [k])) = k; |
2110 |
|
2111 |
k = c; |
2112 |
} |
2113 |
|
2114 |
heap [k] = he; |
2115 |
ev_active (ANHE_w (he)) = k; |
2116 |
} |
2117 |
#endif |
2118 |
|
2119 |
/* towards the root */ |
2120 |
inline_speed void |
2121 |
upheap (ANHE *heap, int k) |
2122 |
{ |
2123 |
ANHE he = heap [k]; |
2124 |
|
2125 |
for (;;) |
2126 |
{ |
2127 |
int p = HPARENT (k); |
2128 |
|
2129 |
if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) |
2130 |
break; |
2131 |
|
2132 |
heap [k] = heap [p]; |
2133 |
ev_active (ANHE_w (heap [k])) = k; |
2134 |
k = p; |
2135 |
} |
2136 |
|
2137 |
heap [k] = he; |
2138 |
ev_active (ANHE_w (he)) = k; |
2139 |
} |
2140 |
|
2141 |
/* move an element suitably so it is in a correct place */ |
2142 |
inline_size void |
2143 |
adjustheap (ANHE *heap, int N, int k) |
2144 |
{ |
2145 |
if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) |
2146 |
upheap (heap, k); |
2147 |
else |
2148 |
downheap (heap, N, k); |
2149 |
} |
2150 |
|
2151 |
/* rebuild the heap: this function is used only once and executed rarely */ |
2152 |
inline_size void |
2153 |
reheap (ANHE *heap, int N) |
2154 |
{ |
2155 |
int i; |
2156 |
|
2157 |
/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ |
2158 |
/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ |
2159 |
for (i = 0; i < N; ++i) |
2160 |
upheap (heap, i + HEAP0); |
2161 |
} |
2162 |
|
2163 |
/*****************************************************************************/ |
2164 |
|
2165 |
/* associate signal watchers to a signal signal */ |
2166 |
typedef struct |
2167 |
{ |
2168 |
EV_ATOMIC_T pending; |
2169 |
#if EV_MULTIPLICITY |
2170 |
EV_P; |
2171 |
#endif |
2172 |
WL head; |
2173 |
} ANSIG; |
2174 |
|
2175 |
static ANSIG signals [EV_NSIG - 1]; |
2176 |
|
2177 |
/*****************************************************************************/ |
2178 |
|
2179 |
#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
2180 |
|
2181 |
static void noinline ecb_cold |
2182 |
evpipe_init (EV_P) |
2183 |
{ |
2184 |
if (!ev_is_active (&pipe_w)) |
2185 |
{ |
2186 |
int fds [2]; |
2187 |
|
2188 |
# if EV_USE_EVENTFD |
2189 |
fds [0] = -1; |
2190 |
fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); |
2191 |
if (fds [1] < 0 && errno == EINVAL) |
2192 |
fds [1] = eventfd (0, 0); |
2193 |
|
2194 |
if (fds [1] < 0) |
2195 |
# endif |
2196 |
{ |
2197 |
while (pipe (fds)) |
2198 |
ev_syserr ("(libev) error creating signal/async pipe"); |
2199 |
|
2200 |
fd_intern (fds [0]); |
2201 |
} |
2202 |
|
2203 |
evpipe [0] = fds [0]; |
2204 |
|
2205 |
if (evpipe [1] < 0) |
2206 |
evpipe [1] = fds [1]; /* first call, set write fd */ |
2207 |
else |
2208 |
{ |
2209 |
/* on subsequent calls, do not change evpipe [1] */ |
2210 |
/* so that evpipe_write can always rely on its value. */ |
2211 |
/* this branch does not do anything sensible on windows, */ |
2212 |
/* so must not be executed on windows */ |
2213 |
|
2214 |
dup2 (fds [1], evpipe [1]); |
2215 |
close (fds [1]); |
2216 |
} |
2217 |
|
2218 |
fd_intern (evpipe [1]); |
2219 |
|
2220 |
ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ); |
2221 |
ev_io_start (EV_A_ &pipe_w); |
2222 |
ev_unref (EV_A); /* watcher should not keep loop alive */ |
2223 |
} |
2224 |
} |
2225 |
|
2226 |
inline_speed void |
2227 |
evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
2228 |
{ |
2229 |
ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */ |
2230 |
|
2231 |
if (expect_true (*flag)) |
2232 |
return; |
2233 |
|
2234 |
*flag = 1; |
2235 |
ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */ |
2236 |
|
2237 |
pipe_write_skipped = 1; |
2238 |
|
2239 |
ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */ |
2240 |
|
2241 |
if (pipe_write_wanted) |
2242 |
{ |
2243 |
int old_errno; |
2244 |
|
2245 |
pipe_write_skipped = 0; |
2246 |
ECB_MEMORY_FENCE_RELEASE; |
2247 |
|
2248 |
old_errno = errno; /* save errno because write will clobber it */ |
2249 |
|
2250 |
#if EV_USE_EVENTFD |
2251 |
if (evpipe [0] < 0) |
2252 |
{ |
2253 |
uint64_t counter = 1; |
2254 |
write (evpipe [1], &counter, sizeof (uint64_t)); |
2255 |
} |
2256 |
else |
2257 |
#endif |
2258 |
{ |
2259 |
#ifdef _WIN32 |
2260 |
WSABUF buf; |
2261 |
DWORD sent; |
2262 |
buf.buf = &buf; |
2263 |
buf.len = 1; |
2264 |
WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0); |
2265 |
#else |
2266 |
write (evpipe [1], &(evpipe [1]), 1); |
2267 |
#endif |
2268 |
} |
2269 |
|
2270 |
errno = old_errno; |
2271 |
} |
2272 |
} |
2273 |
|
2274 |
/* called whenever the libev signal pipe */ |
2275 |
/* got some events (signal, async) */ |
2276 |
static void |
2277 |
pipecb (EV_P_ ev_io *iow, int revents) |
2278 |
{ |
2279 |
int i; |
2280 |
|
2281 |
if (revents & EV_READ) |
2282 |
{ |
2283 |
#if EV_USE_EVENTFD |
2284 |
if (evpipe [0] < 0) |
2285 |
{ |
2286 |
uint64_t counter; |
2287 |
read (evpipe [1], &counter, sizeof (uint64_t)); |
2288 |
} |
2289 |
else |
2290 |
#endif |
2291 |
{ |
2292 |
char dummy[4]; |
2293 |
#ifdef _WIN32 |
2294 |
WSABUF buf; |
2295 |
DWORD recvd; |
2296 |
DWORD flags = 0; |
2297 |
buf.buf = dummy; |
2298 |
buf.len = sizeof (dummy); |
2299 |
WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0); |
2300 |
#else |
2301 |
read (evpipe [0], &dummy, sizeof (dummy)); |
2302 |
#endif |
2303 |
} |
2304 |
} |
2305 |
|
2306 |
pipe_write_skipped = 0; |
2307 |
|
2308 |
ECB_MEMORY_FENCE; /* push out skipped, acquire flags */ |
2309 |
|
2310 |
#if EV_SIGNAL_ENABLE |
2311 |
if (sig_pending) |
2312 |
{ |
2313 |
sig_pending = 0; |
2314 |
|
2315 |
ECB_MEMORY_FENCE; |
2316 |
|
2317 |
for (i = EV_NSIG - 1; i--; ) |
2318 |
if (expect_false (signals [i].pending)) |
2319 |
ev_feed_signal_event (EV_A_ i + 1); |
2320 |
} |
2321 |
#endif |
2322 |
|
2323 |
#if EV_ASYNC_ENABLE |
2324 |
if (async_pending) |
2325 |
{ |
2326 |
async_pending = 0; |
2327 |
|
2328 |
ECB_MEMORY_FENCE; |
2329 |
|
2330 |
for (i = asynccnt; i--; ) |
2331 |
if (asyncs [i]->sent) |
2332 |
{ |
2333 |
asyncs [i]->sent = 0; |
2334 |
ECB_MEMORY_FENCE_RELEASE; |
2335 |
ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
2336 |
} |
2337 |
} |
2338 |
#endif |
2339 |
} |
2340 |
|
2341 |
/*****************************************************************************/ |
2342 |
|
2343 |
void |
2344 |
ev_feed_signal (int signum) EV_THROW |
2345 |
{ |
2346 |
#if EV_MULTIPLICITY |
2347 |
EV_P; |
2348 |
ECB_MEMORY_FENCE_ACQUIRE; |
2349 |
EV_A = signals [signum - 1].loop; |
2350 |
|
2351 |
if (!EV_A) |
2352 |
return; |
2353 |
#endif |
2354 |
|
2355 |
signals [signum - 1].pending = 1; |
2356 |
evpipe_write (EV_A_ &sig_pending); |
2357 |
} |
2358 |
|
2359 |
static void |
2360 |
ev_sighandler (int signum) |
2361 |
{ |
2362 |
#ifdef _WIN32 |
2363 |
signal (signum, ev_sighandler); |
2364 |
#endif |
2365 |
|
2366 |
ev_feed_signal (signum); |
2367 |
} |
2368 |
|
2369 |
void noinline |
2370 |
ev_feed_signal_event (EV_P_ int signum) EV_THROW |
2371 |
{ |
2372 |
WL w; |
2373 |
|
2374 |
if (expect_false (signum <= 0 || signum >= EV_NSIG)) |
2375 |
return; |
2376 |
|
2377 |
--signum; |
2378 |
|
2379 |
#if EV_MULTIPLICITY |
2380 |
/* it is permissible to try to feed a signal to the wrong loop */ |
2381 |
/* or, likely more useful, feeding a signal nobody is waiting for */ |
2382 |
|
2383 |
if (expect_false (signals [signum].loop != EV_A)) |
2384 |
return; |
2385 |
#endif |
2386 |
|
2387 |
signals [signum].pending = 0; |
2388 |
ECB_MEMORY_FENCE_RELEASE; |
2389 |
|
2390 |
for (w = signals [signum].head; w; w = w->next) |
2391 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
2392 |
} |
2393 |
|
2394 |
#if EV_USE_SIGNALFD |
2395 |
static void |
2396 |
sigfdcb (EV_P_ ev_io *iow, int revents) |
2397 |
{ |
2398 |
struct signalfd_siginfo si[2], *sip; /* these structs are big */ |
2399 |
|
2400 |
for (;;) |
2401 |
{ |
2402 |
ssize_t res = read (sigfd, si, sizeof (si)); |
2403 |
|
2404 |
/* not ISO-C, as res might be -1, but works with SuS */ |
2405 |
for (sip = si; (char *)sip < (char *)si + res; ++sip) |
2406 |
ev_feed_signal_event (EV_A_ sip->ssi_signo); |
2407 |
|
2408 |
if (res < (ssize_t)sizeof (si)) |
2409 |
break; |
2410 |
} |
2411 |
} |
2412 |
#endif |
2413 |
|
2414 |
#endif |
2415 |
|
2416 |
/*****************************************************************************/ |
2417 |
|
2418 |
#if EV_CHILD_ENABLE |
2419 |
static WL childs [EV_PID_HASHSIZE]; |
2420 |
|
2421 |
static ev_signal childev; |
2422 |
|
2423 |
#ifndef WIFCONTINUED |
2424 |
# define WIFCONTINUED(status) 0 |
2425 |
#endif |
2426 |
|
2427 |
/* handle a single child status event */ |
2428 |
inline_speed void |
2429 |
child_reap (EV_P_ int chain, int pid, int status) |
2430 |
{ |
2431 |
ev_child *w; |
2432 |
int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
2433 |
|
2434 |
for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
2435 |
{ |
2436 |
if ((w->pid == pid || !w->pid) |
2437 |
&& (!traced || (w->flags & 1))) |
2438 |
{ |
2439 |
ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ |
2440 |
w->rpid = pid; |
2441 |
w->rstatus = status; |
2442 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
2443 |
} |
2444 |
} |
2445 |
} |
2446 |
|
2447 |
#ifndef WCONTINUED |
2448 |
# define WCONTINUED 0 |
2449 |
#endif |
2450 |
|
2451 |
/* called on sigchld etc., calls waitpid */ |
2452 |
static void |
2453 |
childcb (EV_P_ ev_signal *sw, int revents) |
2454 |
{ |
2455 |
int pid, status; |
2456 |
|
2457 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
2458 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
2459 |
if (!WCONTINUED |
2460 |
|| errno != EINVAL |
2461 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
2462 |
return; |
2463 |
|
2464 |
/* make sure we are called again until all children have been reaped */ |
2465 |
/* we need to do it this way so that the callback gets called before we continue */ |
2466 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
2467 |
|
2468 |
child_reap (EV_A_ pid, pid, status); |
2469 |
if ((EV_PID_HASHSIZE) > 1) |
2470 |
child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
2471 |
} |
2472 |
|
2473 |
#endif |
2474 |
|
2475 |
/*****************************************************************************/ |
2476 |
|
2477 |
#if EV_USE_IOCP |
2478 |
# include "ev_iocp.c" |
2479 |
#endif |
2480 |
#if EV_USE_PORT |
2481 |
# include "ev_port.c" |
2482 |
#endif |
2483 |
#if EV_USE_KQUEUE |
2484 |
# include "ev_kqueue.c" |
2485 |
#endif |
2486 |
#if EV_USE_EPOLL |
2487 |
# include "ev_epoll.c" |
2488 |
#endif |
2489 |
#if EV_USE_POLL |
2490 |
# include "ev_poll.c" |
2491 |
#endif |
2492 |
#if EV_USE_SELECT |
2493 |
# include "ev_select.c" |
2494 |
#endif |
2495 |
|
2496 |
int ecb_cold |
2497 |
ev_version_major (void) EV_THROW |
2498 |
{ |
2499 |
return EV_VERSION_MAJOR; |
2500 |
} |
2501 |
|
2502 |
int ecb_cold |
2503 |
ev_version_minor (void) EV_THROW |
2504 |
{ |
2505 |
return EV_VERSION_MINOR; |
2506 |
} |
2507 |
|
2508 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
2509 |
int inline_size ecb_cold |
2510 |
enable_secure (void) |
2511 |
{ |
2512 |
#ifdef _WIN32 |
2513 |
return 0; |
2514 |
#else |
2515 |
return getuid () != geteuid () |
2516 |
|| getgid () != getegid (); |
2517 |
#endif |
2518 |
} |
2519 |
|
2520 |
unsigned int ecb_cold |
2521 |
ev_supported_backends (void) EV_THROW |
2522 |
{ |
2523 |
unsigned int flags = 0; |
2524 |
|
2525 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
2526 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
2527 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
2528 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
2529 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
2530 |
|
2531 |
return flags; |
2532 |
} |
2533 |
|
2534 |
unsigned int ecb_cold |
2535 |
ev_recommended_backends (void) EV_THROW |
2536 |
{ |
2537 |
unsigned int flags = ev_supported_backends (); |
2538 |
|
2539 |
#ifndef __NetBSD__ |
2540 |
/* kqueue is borked on everything but netbsd apparently */ |
2541 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
2542 |
flags &= ~EVBACKEND_KQUEUE; |
2543 |
#endif |
2544 |
#ifdef __APPLE__ |
2545 |
/* only select works correctly on that "unix-certified" platform */ |
2546 |
flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ |
2547 |
flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ |
2548 |
#endif |
2549 |
#ifdef __FreeBSD__ |
2550 |
flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ |
2551 |
#endif |
2552 |
|
2553 |
return flags; |
2554 |
} |
2555 |
|
2556 |
unsigned int ecb_cold |
2557 |
ev_embeddable_backends (void) EV_THROW |
2558 |
{ |
2559 |
int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
2560 |
|
2561 |
/* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
2562 |
if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ |
2563 |
flags &= ~EVBACKEND_EPOLL; |
2564 |
|
2565 |
return flags; |
2566 |
} |
2567 |
|
2568 |
unsigned int |
2569 |
ev_backend (EV_P) EV_THROW |
2570 |
{ |
2571 |
return backend; |
2572 |
} |
2573 |
|
2574 |
#if EV_FEATURE_API |
2575 |
unsigned int |
2576 |
ev_iteration (EV_P) EV_THROW |
2577 |
{ |
2578 |
return loop_count; |
2579 |
} |
2580 |
|
2581 |
unsigned int |
2582 |
ev_depth (EV_P) EV_THROW |
2583 |
{ |
2584 |
return loop_depth; |
2585 |
} |
2586 |
|
2587 |
void |
2588 |
ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW |
2589 |
{ |
2590 |
io_blocktime = interval; |
2591 |
} |
2592 |
|
2593 |
void |
2594 |
ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW |
2595 |
{ |
2596 |
timeout_blocktime = interval; |
2597 |
} |
2598 |
|
2599 |
void |
2600 |
ev_set_userdata (EV_P_ void *data) EV_THROW |
2601 |
{ |
2602 |
userdata = data; |
2603 |
} |
2604 |
|
2605 |
void * |
2606 |
ev_userdata (EV_P) EV_THROW |
2607 |
{ |
2608 |
return userdata; |
2609 |
} |
2610 |
|
2611 |
void |
2612 |
ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW |
2613 |
{ |
2614 |
invoke_cb = invoke_pending_cb; |
2615 |
} |
2616 |
|
2617 |
void |
2618 |
ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW |
2619 |
{ |
2620 |
release_cb = release; |
2621 |
acquire_cb = acquire; |
2622 |
} |
2623 |
#endif |
2624 |
|
2625 |
/* initialise a loop structure, must be zero-initialised */ |
2626 |
static void noinline ecb_cold |
2627 |
loop_init (EV_P_ unsigned int flags) EV_THROW |
2628 |
{ |
2629 |
if (!backend) |
2630 |
{ |
2631 |
origflags = flags; |
2632 |
|
2633 |
#if EV_USE_REALTIME |
2634 |
if (!have_realtime) |
2635 |
{ |
2636 |
struct timespec ts; |
2637 |
|
2638 |
if (!clock_gettime (CLOCK_REALTIME, &ts)) |
2639 |
have_realtime = 1; |
2640 |
} |
2641 |
#endif |
2642 |
|
2643 |
#if EV_USE_MONOTONIC |
2644 |
if (!have_monotonic) |
2645 |
{ |
2646 |
struct timespec ts; |
2647 |
|
2648 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
2649 |
have_monotonic = 1; |
2650 |
} |
2651 |
#endif |
2652 |
|
2653 |
/* pid check not overridable via env */ |
2654 |
#ifndef _WIN32 |
2655 |
if (flags & EVFLAG_FORKCHECK) |
2656 |
curpid = getpid (); |
2657 |
#endif |
2658 |
|
2659 |
if (!(flags & EVFLAG_NOENV) |
2660 |
&& !enable_secure () |
2661 |
&& getenv ("LIBEV_FLAGS")) |
2662 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
2663 |
|
2664 |
ev_rt_now = ev_time (); |
2665 |
mn_now = get_clock (); |
2666 |
now_floor = mn_now; |
2667 |
rtmn_diff = ev_rt_now - mn_now; |
2668 |
#if EV_FEATURE_API |
2669 |
invoke_cb = ev_invoke_pending; |
2670 |
#endif |
2671 |
|
2672 |
io_blocktime = 0.; |
2673 |
timeout_blocktime = 0.; |
2674 |
backend = 0; |
2675 |
backend_fd = -1; |
2676 |
sig_pending = 0; |
2677 |
#if EV_ASYNC_ENABLE |
2678 |
async_pending = 0; |
2679 |
#endif |
2680 |
pipe_write_skipped = 0; |
2681 |
pipe_write_wanted = 0; |
2682 |
evpipe [0] = -1; |
2683 |
evpipe [1] = -1; |
2684 |
#if EV_USE_INOTIFY |
2685 |
fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
2686 |
#endif |
2687 |
#if EV_USE_SIGNALFD |
2688 |
sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
2689 |
#endif |
2690 |
|
2691 |
if (!(flags & EVBACKEND_MASK)) |
2692 |
flags |= ev_recommended_backends (); |
2693 |
|
2694 |
#if EV_USE_IOCP |
2695 |
if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
2696 |
#endif |
2697 |
#if EV_USE_PORT |
2698 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
2699 |
#endif |
2700 |
#if EV_USE_KQUEUE |
2701 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
2702 |
#endif |
2703 |
#if EV_USE_EPOLL |
2704 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
2705 |
#endif |
2706 |
#if EV_USE_POLL |
2707 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
2708 |
#endif |
2709 |
#if EV_USE_SELECT |
2710 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
2711 |
#endif |
2712 |
|
2713 |
ev_prepare_init (&pending_w, pendingcb); |
2714 |
|
2715 |
#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
2716 |
ev_init (&pipe_w, pipecb); |
2717 |
ev_set_priority (&pipe_w, EV_MAXPRI); |
2718 |
#endif |
2719 |
} |
2720 |
} |
2721 |
|
2722 |
/* free up a loop structure */ |
2723 |
void ecb_cold |
2724 |
ev_loop_destroy (EV_P) |
2725 |
{ |
2726 |
int i; |
2727 |
|
2728 |
#if EV_MULTIPLICITY |
2729 |
/* mimic free (0) */ |
2730 |
if (!EV_A) |
2731 |
return; |
2732 |
#endif |
2733 |
|
2734 |
#if EV_CLEANUP_ENABLE |
2735 |
/* queue cleanup watchers (and execute them) */ |
2736 |
if (expect_false (cleanupcnt)) |
2737 |
{ |
2738 |
queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); |
2739 |
EV_INVOKE_PENDING; |
2740 |
} |
2741 |
#endif |
2742 |
|
2743 |
#if EV_CHILD_ENABLE |
2744 |
if (ev_is_default_loop (EV_A) && ev_is_active (&childev)) |
2745 |
{ |
2746 |
ev_ref (EV_A); /* child watcher */ |
2747 |
ev_signal_stop (EV_A_ &childev); |
2748 |
} |
2749 |
#endif |
2750 |
|
2751 |
if (ev_is_active (&pipe_w)) |
2752 |
{ |
2753 |
/*ev_ref (EV_A);*/ |
2754 |
/*ev_io_stop (EV_A_ &pipe_w);*/ |
2755 |
|
2756 |
if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); |
2757 |
if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]); |
2758 |
} |
2759 |
|
2760 |
#if EV_USE_SIGNALFD |
2761 |
if (ev_is_active (&sigfd_w)) |
2762 |
close (sigfd); |
2763 |
#endif |
2764 |
|
2765 |
#if EV_USE_INOTIFY |
2766 |
if (fs_fd >= 0) |
2767 |
close (fs_fd); |
2768 |
#endif |
2769 |
|
2770 |
if (backend_fd >= 0) |
2771 |
close (backend_fd); |
2772 |
|
2773 |
#if EV_USE_IOCP |
2774 |
if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); |
2775 |
#endif |
2776 |
#if EV_USE_PORT |
2777 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
2778 |
#endif |
2779 |
#if EV_USE_KQUEUE |
2780 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
2781 |
#endif |
2782 |
#if EV_USE_EPOLL |
2783 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
2784 |
#endif |
2785 |
#if EV_USE_POLL |
2786 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
2787 |
#endif |
2788 |
#if EV_USE_SELECT |
2789 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
2790 |
#endif |
2791 |
|
2792 |
for (i = NUMPRI; i--; ) |
2793 |
{ |
2794 |
array_free (pending, [i]); |
2795 |
#if EV_IDLE_ENABLE |
2796 |
array_free (idle, [i]); |
2797 |
#endif |
2798 |
} |
2799 |
|
2800 |
ev_free (anfds); anfds = 0; anfdmax = 0; |
2801 |
|
2802 |
/* have to use the microsoft-never-gets-it-right macro */ |
2803 |
array_free (rfeed, EMPTY); |
2804 |
array_free (fdchange, EMPTY); |
2805 |
array_free (timer, EMPTY); |
2806 |
#if EV_PERIODIC_ENABLE |
2807 |
array_free (periodic, EMPTY); |
2808 |
#endif |
2809 |
#if EV_FORK_ENABLE |
2810 |
array_free (fork, EMPTY); |
2811 |
#endif |
2812 |
#if EV_CLEANUP_ENABLE |
2813 |
array_free (cleanup, EMPTY); |
2814 |
#endif |
2815 |
array_free (prepare, EMPTY); |
2816 |
array_free (check, EMPTY); |
2817 |
#if EV_ASYNC_ENABLE |
2818 |
array_free (async, EMPTY); |
2819 |
#endif |
2820 |
|
2821 |
backend = 0; |
2822 |
|
2823 |
#if EV_MULTIPLICITY |
2824 |
if (ev_is_default_loop (EV_A)) |
2825 |
#endif |
2826 |
ev_default_loop_ptr = 0; |
2827 |
#if EV_MULTIPLICITY |
2828 |
else |
2829 |
ev_free (EV_A); |
2830 |
#endif |
2831 |
} |
2832 |
|
2833 |
#if EV_USE_INOTIFY |
2834 |
inline_size void infy_fork (EV_P); |
2835 |
#endif |
2836 |
|
2837 |
inline_size void |
2838 |
loop_fork (EV_P) |
2839 |
{ |
2840 |
#if EV_USE_PORT |
2841 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
2842 |
#endif |
2843 |
#if EV_USE_KQUEUE |
2844 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
2845 |
#endif |
2846 |
#if EV_USE_EPOLL |
2847 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
2848 |
#endif |
2849 |
#if EV_USE_INOTIFY |
2850 |
infy_fork (EV_A); |
2851 |
#endif |
2852 |
|
2853 |
#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
2854 |
if (ev_is_active (&pipe_w)) |
2855 |
{ |
2856 |
/* pipe_write_wanted must be false now, so modifying fd vars should be safe */ |
2857 |
|
2858 |
ev_ref (EV_A); |
2859 |
ev_io_stop (EV_A_ &pipe_w); |
2860 |
|
2861 |
if (evpipe [0] >= 0) |
2862 |
EV_WIN32_CLOSE_FD (evpipe [0]); |
2863 |
|
2864 |
evpipe_init (EV_A); |
2865 |
/* iterate over everything, in case we missed something before */ |
2866 |
ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); |
2867 |
} |
2868 |
#endif |
2869 |
|
2870 |
postfork = 0; |
2871 |
} |
2872 |
|
2873 |
#if EV_MULTIPLICITY |
2874 |
|
2875 |
struct ev_loop * ecb_cold |
2876 |
ev_loop_new (unsigned int flags) EV_THROW |
2877 |
{ |
2878 |
EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
2879 |
|
2880 |
memset (EV_A, 0, sizeof (struct ev_loop)); |
2881 |
loop_init (EV_A_ flags); |
2882 |
|
2883 |
if (ev_backend (EV_A)) |
2884 |
return EV_A; |
2885 |
|
2886 |
ev_free (EV_A); |
2887 |
return 0; |
2888 |
} |
2889 |
|
2890 |
#endif /* multiplicity */ |
2891 |
|
2892 |
#if EV_VERIFY |
2893 |
static void noinline ecb_cold |
2894 |
verify_watcher (EV_P_ W w) |
2895 |
{ |
2896 |
assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); |
2897 |
|
2898 |
if (w->pending) |
2899 |
assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); |
2900 |
} |
2901 |
|
2902 |
static void noinline ecb_cold |
2903 |
verify_heap (EV_P_ ANHE *heap, int N) |
2904 |
{ |
2905 |
int i; |
2906 |
|
2907 |
for (i = HEAP0; i < N + HEAP0; ++i) |
2908 |
{ |
2909 |
assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); |
2910 |
assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); |
2911 |
assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); |
2912 |
|
2913 |
verify_watcher (EV_A_ (W)ANHE_w (heap [i])); |
2914 |
} |
2915 |
} |
2916 |
|
2917 |
static void noinline ecb_cold |
2918 |
array_verify (EV_P_ W *ws, int cnt) |
2919 |
{ |
2920 |
while (cnt--) |
2921 |
{ |
2922 |
assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); |
2923 |
verify_watcher (EV_A_ ws [cnt]); |
2924 |
} |
2925 |
} |
2926 |
#endif |
2927 |
|
2928 |
#if EV_FEATURE_API |
2929 |
void ecb_cold |
2930 |
ev_verify (EV_P) EV_THROW |
2931 |
{ |
2932 |
#if EV_VERIFY |
2933 |
int i; |
2934 |
WL w, w2; |
2935 |
|
2936 |
assert (activecnt >= -1); |
2937 |
|
2938 |
assert (fdchangemax >= fdchangecnt); |
2939 |
for (i = 0; i < fdchangecnt; ++i) |
2940 |
assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); |
2941 |
|
2942 |
assert (anfdmax >= 0); |
2943 |
for (i = 0; i < anfdmax; ++i) |
2944 |
{ |
2945 |
int j = 0; |
2946 |
|
2947 |
for (w = w2 = anfds [i].head; w; w = w->next) |
2948 |
{ |
2949 |
verify_watcher (EV_A_ (W)w); |
2950 |
|
2951 |
if (j++ & 1) |
2952 |
{ |
2953 |
assert (("libev: io watcher list contains a loop", w != w2)); |
2954 |
w2 = w2->next; |
2955 |
} |
2956 |
|
2957 |
assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); |
2958 |
assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); |
2959 |
} |
2960 |
} |
2961 |
|
2962 |
assert (timermax >= timercnt); |
2963 |
verify_heap (EV_A_ timers, timercnt); |
2964 |
|
2965 |
#if EV_PERIODIC_ENABLE |
2966 |
assert (periodicmax >= periodiccnt); |
2967 |
verify_heap (EV_A_ periodics, periodiccnt); |
2968 |
#endif |
2969 |
|
2970 |
for (i = NUMPRI; i--; ) |
2971 |
{ |
2972 |
assert (pendingmax [i] >= pendingcnt [i]); |
2973 |
#if EV_IDLE_ENABLE |
2974 |
assert (idleall >= 0); |
2975 |
assert (idlemax [i] >= idlecnt [i]); |
2976 |
array_verify (EV_A_ (W *)idles [i], idlecnt [i]); |
2977 |
#endif |
2978 |
} |
2979 |
|
2980 |
#if EV_FORK_ENABLE |
2981 |
assert (forkmax >= forkcnt); |
2982 |
array_verify (EV_A_ (W *)forks, forkcnt); |
2983 |
#endif |
2984 |
|
2985 |
#if EV_CLEANUP_ENABLE |
2986 |
assert (cleanupmax >= cleanupcnt); |
2987 |
array_verify (EV_A_ (W *)cleanups, cleanupcnt); |
2988 |
#endif |
2989 |
|
2990 |
#if EV_ASYNC_ENABLE |
2991 |
assert (asyncmax >= asynccnt); |
2992 |
array_verify (EV_A_ (W *)asyncs, asynccnt); |
2993 |
#endif |
2994 |
|
2995 |
#if EV_PREPARE_ENABLE |
2996 |
assert (preparemax >= preparecnt); |
2997 |
array_verify (EV_A_ (W *)prepares, preparecnt); |
2998 |
#endif |
2999 |
|
3000 |
#if EV_CHECK_ENABLE |
3001 |
assert (checkmax >= checkcnt); |
3002 |
array_verify (EV_A_ (W *)checks, checkcnt); |
3003 |
#endif |
3004 |
|
3005 |
# if 0 |
3006 |
#if EV_CHILD_ENABLE |
3007 |
for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
3008 |
for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) |
3009 |
#endif |
3010 |
# endif |
3011 |
#endif |
3012 |
} |
3013 |
#endif |
3014 |
|
3015 |
#if EV_MULTIPLICITY |
3016 |
struct ev_loop * ecb_cold |
3017 |
#else |
3018 |
int |
3019 |
#endif |
3020 |
ev_default_loop (unsigned int flags) EV_THROW |
3021 |
{ |
3022 |
if (!ev_default_loop_ptr) |
3023 |
{ |
3024 |
#if EV_MULTIPLICITY |
3025 |
EV_P = ev_default_loop_ptr = &default_loop_struct; |
3026 |
#else |
3027 |
ev_default_loop_ptr = 1; |
3028 |
#endif |
3029 |
|
3030 |
loop_init (EV_A_ flags); |
3031 |
|
3032 |
if (ev_backend (EV_A)) |
3033 |
{ |
3034 |
#if EV_CHILD_ENABLE |
3035 |
ev_signal_init (&childev, childcb, SIGCHLD); |
3036 |
ev_set_priority (&childev, EV_MAXPRI); |
3037 |
ev_signal_start (EV_A_ &childev); |
3038 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
3039 |
#endif |
3040 |
} |
3041 |
else |
3042 |
ev_default_loop_ptr = 0; |
3043 |
} |
3044 |
|
3045 |
return ev_default_loop_ptr; |
3046 |
} |
3047 |
|
3048 |
void |
3049 |
ev_loop_fork (EV_P) EV_THROW |
3050 |
{ |
3051 |
postfork = 1; |
3052 |
} |
3053 |
|
3054 |
/*****************************************************************************/ |
3055 |
|
3056 |
void |
3057 |
ev_invoke (EV_P_ void *w, int revents) |
3058 |
{ |
3059 |
EV_CB_INVOKE ((W)w, revents); |
3060 |
} |
3061 |
|
3062 |
unsigned int |
3063 |
ev_pending_count (EV_P) EV_THROW |
3064 |
{ |
3065 |
int pri; |
3066 |
unsigned int count = 0; |
3067 |
|
3068 |
for (pri = NUMPRI; pri--; ) |
3069 |
count += pendingcnt [pri]; |
3070 |
|
3071 |
return count; |
3072 |
} |
3073 |
|
3074 |
void noinline |
3075 |
ev_invoke_pending (EV_P) |
3076 |
{ |
3077 |
pendingpri = NUMPRI; |
3078 |
|
3079 |
while (pendingpri) /* pendingpri possibly gets modified in the inner loop */ |
3080 |
{ |
3081 |
--pendingpri; |
3082 |
|
3083 |
while (pendingcnt [pendingpri]) |
3084 |
{ |
3085 |
ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri]; |
3086 |
|
3087 |
p->w->pending = 0; |
3088 |
EV_CB_INVOKE (p->w, p->events); |
3089 |
EV_FREQUENT_CHECK; |
3090 |
} |
3091 |
} |
3092 |
} |
3093 |
|
3094 |
#if EV_IDLE_ENABLE |
3095 |
/* make idle watchers pending. this handles the "call-idle */ |
3096 |
/* only when higher priorities are idle" logic */ |
3097 |
inline_size void |
3098 |
idle_reify (EV_P) |
3099 |
{ |
3100 |
if (expect_false (idleall)) |
3101 |
{ |
3102 |
int pri; |
3103 |
|
3104 |
for (pri = NUMPRI; pri--; ) |
3105 |
{ |
3106 |
if (pendingcnt [pri]) |
3107 |
break; |
3108 |
|
3109 |
if (idlecnt [pri]) |
3110 |
{ |
3111 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
3112 |
break; |
3113 |
} |
3114 |
} |
3115 |
} |
3116 |
} |
3117 |
#endif |
3118 |
|
3119 |
/* make timers pending */ |
3120 |
inline_size void |
3121 |
timers_reify (EV_P) |
3122 |
{ |
3123 |
EV_FREQUENT_CHECK; |
3124 |
|
3125 |
if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) |
3126 |
{ |
3127 |
do |
3128 |
{ |
3129 |
ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); |
3130 |
|
3131 |
/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ |
3132 |
|
3133 |
/* first reschedule or stop timer */ |
3134 |
if (w->repeat) |
3135 |
{ |
3136 |
ev_at (w) += w->repeat; |
3137 |
if (ev_at (w) < mn_now) |
3138 |
ev_at (w) = mn_now; |
3139 |
|
3140 |
assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
3141 |
|
3142 |
ANHE_at_cache (timers [HEAP0]); |
3143 |
downheap (timers, timercnt, HEAP0); |
3144 |
} |
3145 |
else |
3146 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
3147 |
|
3148 |
EV_FREQUENT_CHECK; |
3149 |
feed_reverse (EV_A_ (W)w); |
3150 |
} |
3151 |
while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); |
3152 |
|
3153 |
feed_reverse_done (EV_A_ EV_TIMER); |
3154 |
} |
3155 |
} |
3156 |
|
3157 |
#if EV_PERIODIC_ENABLE |
3158 |
|
3159 |
static void noinline |
3160 |
periodic_recalc (EV_P_ ev_periodic *w) |
3161 |
{ |
3162 |
ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; |
3163 |
ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); |
3164 |
|
3165 |
/* the above almost always errs on the low side */ |
3166 |
while (at <= ev_rt_now) |
3167 |
{ |
3168 |
ev_tstamp nat = at + w->interval; |
3169 |
|
3170 |
/* when resolution fails us, we use ev_rt_now */ |
3171 |
if (expect_false (nat == at)) |
3172 |
{ |
3173 |
at = ev_rt_now; |
3174 |
break; |
3175 |
} |
3176 |
|
3177 |
at = nat; |
3178 |
} |
3179 |
|
3180 |
ev_at (w) = at; |
3181 |
} |
3182 |
|
3183 |
/* make periodics pending */ |
3184 |
inline_size void |
3185 |
periodics_reify (EV_P) |
3186 |
{ |
3187 |
EV_FREQUENT_CHECK; |
3188 |
|
3189 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) |
3190 |
{ |
3191 |
do |
3192 |
{ |
3193 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); |
3194 |
|
3195 |
/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ |
3196 |
|
3197 |
/* first reschedule or stop timer */ |
3198 |
if (w->reschedule_cb) |
3199 |
{ |
3200 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
3201 |
|
3202 |
assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); |
3203 |
|
3204 |
ANHE_at_cache (periodics [HEAP0]); |
3205 |
downheap (periodics, periodiccnt, HEAP0); |
3206 |
} |
3207 |
else if (w->interval) |
3208 |
{ |
3209 |
periodic_recalc (EV_A_ w); |
3210 |
ANHE_at_cache (periodics [HEAP0]); |
3211 |
downheap (periodics, periodiccnt, HEAP0); |
3212 |
} |
3213 |
else |
3214 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
3215 |
|
3216 |
EV_FREQUENT_CHECK; |
3217 |
feed_reverse (EV_A_ (W)w); |
3218 |
} |
3219 |
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); |
3220 |
|
3221 |
feed_reverse_done (EV_A_ EV_PERIODIC); |
3222 |
} |
3223 |
} |
3224 |
|
3225 |
/* simply recalculate all periodics */ |
3226 |
/* TODO: maybe ensure that at least one event happens when jumping forward? */ |
3227 |
static void noinline ecb_cold |
3228 |
periodics_reschedule (EV_P) |
3229 |
{ |
3230 |
int i; |
3231 |
|
3232 |
/* adjust periodics after time jump */ |
3233 |
for (i = HEAP0; i < periodiccnt + HEAP0; ++i) |
3234 |
{ |
3235 |
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
3236 |
|
3237 |
if (w->reschedule_cb) |
3238 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
3239 |
else if (w->interval) |
3240 |
periodic_recalc (EV_A_ w); |
3241 |
|
3242 |
ANHE_at_cache (periodics [i]); |
3243 |
} |
3244 |
|
3245 |
reheap (periodics, periodiccnt); |
3246 |
} |
3247 |
#endif |
3248 |
|
3249 |
/* adjust all timers by a given offset */ |
3250 |
static void noinline ecb_cold |
3251 |
timers_reschedule (EV_P_ ev_tstamp adjust) |
3252 |
{ |
3253 |
int i; |
3254 |
|
3255 |
for (i = 0; i < timercnt; ++i) |
3256 |
{ |
3257 |
ANHE *he = timers + i + HEAP0; |
3258 |
ANHE_w (*he)->at += adjust; |
3259 |
ANHE_at_cache (*he); |
3260 |
} |
3261 |
} |
3262 |
|
3263 |
/* fetch new monotonic and realtime times from the kernel */ |
3264 |
/* also detect if there was a timejump, and act accordingly */ |
3265 |
inline_speed void |
3266 |
time_update (EV_P_ ev_tstamp max_block) |
3267 |
{ |
3268 |
#if EV_USE_MONOTONIC |
3269 |
if (expect_true (have_monotonic)) |
3270 |
{ |
3271 |
int i; |
3272 |
ev_tstamp odiff = rtmn_diff; |
3273 |
|
3274 |
mn_now = get_clock (); |
3275 |
|
3276 |
/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
3277 |
/* interpolate in the meantime */ |
3278 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
3279 |
{ |
3280 |
ev_rt_now = rtmn_diff + mn_now; |
3281 |
return; |
3282 |
} |
3283 |
|
3284 |
now_floor = mn_now; |
3285 |
ev_rt_now = ev_time (); |
3286 |
|
3287 |
/* loop a few times, before making important decisions. |
3288 |
* on the choice of "4": one iteration isn't enough, |
3289 |
* in case we get preempted during the calls to |
3290 |
* ev_time and get_clock. a second call is almost guaranteed |
3291 |
* to succeed in that case, though. and looping a few more times |
3292 |
* doesn't hurt either as we only do this on time-jumps or |
3293 |
* in the unlikely event of having been preempted here. |
3294 |
*/ |
3295 |
for (i = 4; --i; ) |
3296 |
{ |
3297 |
ev_tstamp diff; |
3298 |
rtmn_diff = ev_rt_now - mn_now; |
3299 |
|
3300 |
diff = odiff - rtmn_diff; |
3301 |
|
3302 |
if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) |
3303 |
return; /* all is well */ |
3304 |
|
3305 |
ev_rt_now = ev_time (); |
3306 |
mn_now = get_clock (); |
3307 |
now_floor = mn_now; |
3308 |
} |
3309 |
|
3310 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
3311 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
3312 |
# if EV_PERIODIC_ENABLE |
3313 |
periodics_reschedule (EV_A); |
3314 |
# endif |
3315 |
} |
3316 |
else |
3317 |
#endif |
3318 |
{ |
3319 |
ev_rt_now = ev_time (); |
3320 |
|
3321 |
if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
3322 |
{ |
3323 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
3324 |
timers_reschedule (EV_A_ ev_rt_now - mn_now); |
3325 |
#if EV_PERIODIC_ENABLE |
3326 |
periodics_reschedule (EV_A); |
3327 |
#endif |
3328 |
} |
3329 |
|
3330 |
mn_now = ev_rt_now; |
3331 |
} |
3332 |
} |
3333 |
|
3334 |
int |
3335 |
ev_run (EV_P_ int flags) |
3336 |
{ |
3337 |
#if EV_FEATURE_API |
3338 |
++loop_depth; |
3339 |
#endif |
3340 |
|
3341 |
assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); |
3342 |
|
3343 |
loop_done = EVBREAK_CANCEL; |
3344 |
|
3345 |
EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ |
3346 |
|
3347 |
do |
3348 |
{ |
3349 |
#if EV_VERIFY >= 2 |
3350 |
ev_verify (EV_A); |
3351 |
#endif |
3352 |
|
3353 |
#ifndef _WIN32 |
3354 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
3355 |
if (expect_false (getpid () != curpid)) |
3356 |
{ |
3357 |
curpid = getpid (); |
3358 |
postfork = 1; |
3359 |
} |
3360 |
#endif |
3361 |
|
3362 |
#if EV_FORK_ENABLE |
3363 |
/* we might have forked, so queue fork handlers */ |
3364 |
if (expect_false (postfork)) |
3365 |
if (forkcnt) |
3366 |
{ |
3367 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
3368 |
EV_INVOKE_PENDING; |
3369 |
} |
3370 |
#endif |
3371 |
|
3372 |
#if EV_PREPARE_ENABLE |
3373 |
/* queue prepare watchers (and execute them) */ |
3374 |
if (expect_false (preparecnt)) |
3375 |
{ |
3376 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
3377 |
EV_INVOKE_PENDING; |
3378 |
} |
3379 |
#endif |
3380 |
|
3381 |
if (expect_false (loop_done)) |
3382 |
break; |
3383 |
|
3384 |
/* we might have forked, so reify kernel state if necessary */ |
3385 |
if (expect_false (postfork)) |
3386 |
loop_fork (EV_A); |
3387 |
|
3388 |
/* update fd-related kernel structures */ |
3389 |
fd_reify (EV_A); |
3390 |
|
3391 |
/* calculate blocking time */ |
3392 |
{ |
3393 |
ev_tstamp waittime = 0.; |
3394 |
ev_tstamp sleeptime = 0.; |
3395 |
|
3396 |
/* remember old timestamp for io_blocktime calculation */ |
3397 |
ev_tstamp prev_mn_now = mn_now; |
3398 |
|
3399 |
/* update time to cancel out callback processing overhead */ |
3400 |
time_update (EV_A_ 1e100); |
3401 |
|
3402 |
/* from now on, we want a pipe-wake-up */ |
3403 |
pipe_write_wanted = 1; |
3404 |
|
3405 |
ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ |
3406 |
|
3407 |
if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) |
3408 |
{ |
3409 |
waittime = MAX_BLOCKTIME; |
3410 |
|
3411 |
if (timercnt) |
3412 |
{ |
3413 |
ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; |
3414 |
if (waittime > to) waittime = to; |
3415 |
} |
3416 |
|
3417 |
#if EV_PERIODIC_ENABLE |
3418 |
if (periodiccnt) |
3419 |
{ |
3420 |
ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now; |
3421 |
if (waittime > to) waittime = to; |
3422 |
} |
3423 |
#endif |
3424 |
|
3425 |
/* don't let timeouts decrease the waittime below timeout_blocktime */ |
3426 |
if (expect_false (waittime < timeout_blocktime)) |
3427 |
waittime = timeout_blocktime; |
3428 |
|
3429 |
/* at this point, we NEED to wait, so we have to ensure */ |
3430 |
/* to pass a minimum nonzero value to the backend */ |
3431 |
if (expect_false (waittime < backend_mintime)) |
3432 |
waittime = backend_mintime; |
3433 |
|
3434 |
/* extra check because io_blocktime is commonly 0 */ |
3435 |
if (expect_false (io_blocktime)) |
3436 |
{ |
3437 |
sleeptime = io_blocktime - (mn_now - prev_mn_now); |
3438 |
|
3439 |
if (sleeptime > waittime - backend_mintime) |
3440 |
sleeptime = waittime - backend_mintime; |
3441 |
|
3442 |
if (expect_true (sleeptime > 0.)) |
3443 |
{ |
3444 |
ev_sleep (sleeptime); |
3445 |
waittime -= sleeptime; |
3446 |
} |
3447 |
} |
3448 |
} |
3449 |
|
3450 |
#if EV_FEATURE_API |
3451 |
++loop_count; |
3452 |
#endif |
3453 |
assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ |
3454 |
backend_poll (EV_A_ waittime); |
3455 |
assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ |
3456 |
|
3457 |
pipe_write_wanted = 0; /* just an optimisation, no fence needed */ |
3458 |
|
3459 |
ECB_MEMORY_FENCE_ACQUIRE; |
3460 |
if (pipe_write_skipped) |
3461 |
{ |
3462 |
assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); |
3463 |
ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); |
3464 |
} |
3465 |
|
3466 |
|
3467 |
/* update ev_rt_now, do magic */ |
3468 |
time_update (EV_A_ waittime + sleeptime); |
3469 |
} |
3470 |
|
3471 |
/* queue pending timers and reschedule them */ |
3472 |
timers_reify (EV_A); /* relative timers called last */ |
3473 |
#if EV_PERIODIC_ENABLE |
3474 |
periodics_reify (EV_A); /* absolute timers called first */ |
3475 |
#endif |
3476 |
|
3477 |
#if EV_IDLE_ENABLE |
3478 |
/* queue idle watchers unless other events are pending */ |
3479 |
idle_reify (EV_A); |
3480 |
#endif |
3481 |
|
3482 |
#if EV_CHECK_ENABLE |
3483 |
/* queue check watchers, to be executed first */ |
3484 |
if (expect_false (checkcnt)) |
3485 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
3486 |
#endif |
3487 |
|
3488 |
EV_INVOKE_PENDING; |
3489 |
} |
3490 |
while (expect_true ( |
3491 |
activecnt |
3492 |
&& !loop_done |
3493 |
&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) |
3494 |
)); |
3495 |
|
3496 |
if (loop_done == EVBREAK_ONE) |
3497 |
loop_done = EVBREAK_CANCEL; |
3498 |
|
3499 |
#if EV_FEATURE_API |
3500 |
--loop_depth; |
3501 |
#endif |
3502 |
|
3503 |
return activecnt; |
3504 |
} |
3505 |
|
3506 |
void |
3507 |
ev_break (EV_P_ int how) EV_THROW |
3508 |
{ |
3509 |
loop_done = how; |
3510 |
} |
3511 |
|
3512 |
void |
3513 |
ev_ref (EV_P) EV_THROW |
3514 |
{ |
3515 |
++activecnt; |
3516 |
} |
3517 |
|
3518 |
void |
3519 |
ev_unref (EV_P) EV_THROW |
3520 |
{ |
3521 |
--activecnt; |
3522 |
} |
3523 |
|
3524 |
void |
3525 |
ev_now_update (EV_P) EV_THROW |
3526 |
{ |
3527 |
time_update (EV_A_ 1e100); |
3528 |
} |
3529 |
|
3530 |
void |
3531 |
ev_suspend (EV_P) EV_THROW |
3532 |
{ |
3533 |
ev_now_update (EV_A); |
3534 |
} |
3535 |
|
3536 |
void |
3537 |
ev_resume (EV_P) EV_THROW |
3538 |
{ |
3539 |
ev_tstamp mn_prev = mn_now; |
3540 |
|
3541 |
ev_now_update (EV_A); |
3542 |
timers_reschedule (EV_A_ mn_now - mn_prev); |
3543 |
#if EV_PERIODIC_ENABLE |
3544 |
/* TODO: really do this? */ |
3545 |
periodics_reschedule (EV_A); |
3546 |
#endif |
3547 |
} |
3548 |
|
3549 |
/*****************************************************************************/ |
3550 |
/* singly-linked list management, used when the expected list length is short */ |
3551 |
|
3552 |
inline_size void |
3553 |
wlist_add (WL *head, WL elem) |
3554 |
{ |
3555 |
elem->next = *head; |
3556 |
*head = elem; |
3557 |
} |
3558 |
|
3559 |
inline_size void |
3560 |
wlist_del (WL *head, WL elem) |
3561 |
{ |
3562 |
while (*head) |
3563 |
{ |
3564 |
if (expect_true (*head == elem)) |
3565 |
{ |
3566 |
*head = elem->next; |
3567 |
break; |
3568 |
} |
3569 |
|
3570 |
head = &(*head)->next; |
3571 |
} |
3572 |
} |
3573 |
|
3574 |
/* internal, faster, version of ev_clear_pending */ |
3575 |
inline_speed void |
3576 |
clear_pending (EV_P_ W w) |
3577 |
{ |
3578 |
if (w->pending) |
3579 |
{ |
3580 |
pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; |
3581 |
w->pending = 0; |
3582 |
} |
3583 |
} |
3584 |
|
3585 |
int |
3586 |
ev_clear_pending (EV_P_ void *w) EV_THROW |
3587 |
{ |
3588 |
W w_ = (W)w; |
3589 |
int pending = w_->pending; |
3590 |
|
3591 |
if (expect_true (pending)) |
3592 |
{ |
3593 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
3594 |
p->w = (W)&pending_w; |
3595 |
w_->pending = 0; |
3596 |
return p->events; |
3597 |
} |
3598 |
else |
3599 |
return 0; |
3600 |
} |
3601 |
|
3602 |
inline_size void |
3603 |
pri_adjust (EV_P_ W w) |
3604 |
{ |
3605 |
int pri = ev_priority (w); |
3606 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
3607 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
3608 |
ev_set_priority (w, pri); |
3609 |
} |
3610 |
|
3611 |
inline_speed void |
3612 |
ev_start (EV_P_ W w, int active) |
3613 |
{ |
3614 |
pri_adjust (EV_A_ w); |
3615 |
w->active = active; |
3616 |
ev_ref (EV_A); |
3617 |
} |
3618 |
|
3619 |
inline_size void |
3620 |
ev_stop (EV_P_ W w) |
3621 |
{ |
3622 |
ev_unref (EV_A); |
3623 |
w->active = 0; |
3624 |
} |
3625 |
|
3626 |
/*****************************************************************************/ |
3627 |
|
3628 |
void noinline |
3629 |
ev_io_start (EV_P_ ev_io *w) EV_THROW |
3630 |
{ |
3631 |
int fd = w->fd; |
3632 |
|
3633 |
if (expect_false (ev_is_active (w))) |
3634 |
return; |
3635 |
|
3636 |
assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
3637 |
assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
3638 |
|
3639 |
EV_FREQUENT_CHECK; |
3640 |
|
3641 |
ev_start (EV_A_ (W)w, 1); |
3642 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
3643 |
wlist_add (&anfds[fd].head, (WL)w); |
3644 |
|
3645 |
/* common bug, apparently */ |
3646 |
assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w)); |
3647 |
|
3648 |
fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); |
3649 |
w->events &= ~EV__IOFDSET; |
3650 |
|
3651 |
EV_FREQUENT_CHECK; |
3652 |
} |
3653 |
|
3654 |
void noinline |
3655 |
ev_io_stop (EV_P_ ev_io *w) EV_THROW |
3656 |
{ |
3657 |
clear_pending (EV_A_ (W)w); |
3658 |
if (expect_false (!ev_is_active (w))) |
3659 |
return; |
3660 |
|
3661 |
assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
3662 |
|
3663 |
EV_FREQUENT_CHECK; |
3664 |
|
3665 |
wlist_del (&anfds[w->fd].head, (WL)w); |
3666 |
ev_stop (EV_A_ (W)w); |
3667 |
|
3668 |
fd_change (EV_A_ w->fd, EV_ANFD_REIFY); |
3669 |
|
3670 |
EV_FREQUENT_CHECK; |
3671 |
} |
3672 |
|
3673 |
void noinline |
3674 |
ev_timer_start (EV_P_ ev_timer *w) EV_THROW |
3675 |
{ |
3676 |
if (expect_false (ev_is_active (w))) |
3677 |
return; |
3678 |
|
3679 |
ev_at (w) += mn_now; |
3680 |
|
3681 |
assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
3682 |
|
3683 |
EV_FREQUENT_CHECK; |
3684 |
|
3685 |
++timercnt; |
3686 |
ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); |
3687 |
array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); |
3688 |
ANHE_w (timers [ev_active (w)]) = (WT)w; |
3689 |
ANHE_at_cache (timers [ev_active (w)]); |
3690 |
upheap (timers, ev_active (w)); |
3691 |
|
3692 |
EV_FREQUENT_CHECK; |
3693 |
|
3694 |
/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ |
3695 |
} |
3696 |
|
3697 |
void noinline |
3698 |
ev_timer_stop (EV_P_ ev_timer *w) EV_THROW |
3699 |
{ |
3700 |
clear_pending (EV_A_ (W)w); |
3701 |
if (expect_false (!ev_is_active (w))) |
3702 |
return; |
3703 |
|
3704 |
EV_FREQUENT_CHECK; |
3705 |
|
3706 |
{ |
3707 |
int active = ev_active (w); |
3708 |
|
3709 |
assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); |
3710 |
|
3711 |
--timercnt; |
3712 |
|
3713 |
if (expect_true (active < timercnt + HEAP0)) |
3714 |
{ |
3715 |
timers [active] = timers [timercnt + HEAP0]; |
3716 |
adjustheap (timers, timercnt, active); |
3717 |
} |
3718 |
} |
3719 |
|
3720 |
ev_at (w) -= mn_now; |
3721 |
|
3722 |
ev_stop (EV_A_ (W)w); |
3723 |
|
3724 |
EV_FREQUENT_CHECK; |
3725 |
} |
3726 |
|
3727 |
void noinline |
3728 |
ev_timer_again (EV_P_ ev_timer *w) EV_THROW |
3729 |
{ |
3730 |
EV_FREQUENT_CHECK; |
3731 |
|
3732 |
clear_pending (EV_A_ (W)w); |
3733 |
|
3734 |
if (ev_is_active (w)) |
3735 |
{ |
3736 |
if (w->repeat) |
3737 |
{ |
3738 |
ev_at (w) = mn_now + w->repeat; |
3739 |
ANHE_at_cache (timers [ev_active (w)]); |
3740 |
adjustheap (timers, timercnt, ev_active (w)); |
3741 |
} |
3742 |
else |
3743 |
ev_timer_stop (EV_A_ w); |
3744 |
} |
3745 |
else if (w->repeat) |
3746 |
{ |
3747 |
ev_at (w) = w->repeat; |
3748 |
ev_timer_start (EV_A_ w); |
3749 |
} |
3750 |
|
3751 |
EV_FREQUENT_CHECK; |
3752 |
} |
3753 |
|
3754 |
ev_tstamp |
3755 |
ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW |
3756 |
{ |
3757 |
return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); |
3758 |
} |
3759 |
|
3760 |
#if EV_PERIODIC_ENABLE |
3761 |
void noinline |
3762 |
ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW |
3763 |
{ |
3764 |
if (expect_false (ev_is_active (w))) |
3765 |
return; |
3766 |
|
3767 |
if (w->reschedule_cb) |
3768 |
ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
3769 |
else if (w->interval) |
3770 |
{ |
3771 |
assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
3772 |
periodic_recalc (EV_A_ w); |
3773 |
} |
3774 |
else |
3775 |
ev_at (w) = w->offset; |
3776 |
|
3777 |
EV_FREQUENT_CHECK; |
3778 |
|
3779 |
++periodiccnt; |
3780 |
ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); |
3781 |
array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); |
3782 |
ANHE_w (periodics [ev_active (w)]) = (WT)w; |
3783 |
ANHE_at_cache (periodics [ev_active (w)]); |
3784 |
upheap (periodics, ev_active (w)); |
3785 |
|
3786 |
EV_FREQUENT_CHECK; |
3787 |
|
3788 |
/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ |
3789 |
} |
3790 |
|
3791 |
void noinline |
3792 |
ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW |
3793 |
{ |
3794 |
clear_pending (EV_A_ (W)w); |
3795 |
if (expect_false (!ev_is_active (w))) |
3796 |
return; |
3797 |
|
3798 |
EV_FREQUENT_CHECK; |
3799 |
|
3800 |
{ |
3801 |
int active = ev_active (w); |
3802 |
|
3803 |
assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); |
3804 |
|
3805 |
--periodiccnt; |
3806 |
|
3807 |
if (expect_true (active < periodiccnt + HEAP0)) |
3808 |
{ |
3809 |
periodics [active] = periodics [periodiccnt + HEAP0]; |
3810 |
adjustheap (periodics, periodiccnt, active); |
3811 |
} |
3812 |
} |
3813 |
|
3814 |
ev_stop (EV_A_ (W)w); |
3815 |
|
3816 |
EV_FREQUENT_CHECK; |
3817 |
} |
3818 |
|
3819 |
void noinline |
3820 |
ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW |
3821 |
{ |
3822 |
/* TODO: use adjustheap and recalculation */ |
3823 |
ev_periodic_stop (EV_A_ w); |
3824 |
ev_periodic_start (EV_A_ w); |
3825 |
} |
3826 |
#endif |
3827 |
|
3828 |
#ifndef SA_RESTART |
3829 |
# define SA_RESTART 0 |
3830 |
#endif |
3831 |
|
3832 |
#if EV_SIGNAL_ENABLE |
3833 |
|
3834 |
void noinline |
3835 |
ev_signal_start (EV_P_ ev_signal *w) EV_THROW |
3836 |
{ |
3837 |
if (expect_false (ev_is_active (w))) |
3838 |
return; |
3839 |
|
3840 |
assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); |
3841 |
|
3842 |
#if EV_MULTIPLICITY |
3843 |
assert (("libev: a signal must not be attached to two different loops", |
3844 |
!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); |
3845 |
|
3846 |
signals [w->signum - 1].loop = EV_A; |
3847 |
ECB_MEMORY_FENCE_RELEASE; |
3848 |
#endif |
3849 |
|
3850 |
EV_FREQUENT_CHECK; |
3851 |
|
3852 |
#if EV_USE_SIGNALFD |
3853 |
if (sigfd == -2) |
3854 |
{ |
3855 |
sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); |
3856 |
if (sigfd < 0 && errno == EINVAL) |
3857 |
sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ |
3858 |
|
3859 |
if (sigfd >= 0) |
3860 |
{ |
3861 |
fd_intern (sigfd); /* doing it twice will not hurt */ |
3862 |
|
3863 |
sigemptyset (&sigfd_set); |
3864 |
|
3865 |
ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); |
3866 |
ev_set_priority (&sigfd_w, EV_MAXPRI); |
3867 |
ev_io_start (EV_A_ &sigfd_w); |
3868 |
ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ |
3869 |
} |
3870 |
} |
3871 |
|
3872 |
if (sigfd >= 0) |
3873 |
{ |
3874 |
/* TODO: check .head */ |
3875 |
sigaddset (&sigfd_set, w->signum); |
3876 |
sigprocmask (SIG_BLOCK, &sigfd_set, 0); |
3877 |
|
3878 |
signalfd (sigfd, &sigfd_set, 0); |
3879 |
} |
3880 |
#endif |
3881 |
|
3882 |
ev_start (EV_A_ (W)w, 1); |
3883 |
wlist_add (&signals [w->signum - 1].head, (WL)w); |
3884 |
|
3885 |
if (!((WL)w)->next) |
3886 |
# if EV_USE_SIGNALFD |
3887 |
if (sigfd < 0) /*TODO*/ |
3888 |
# endif |
3889 |
{ |
3890 |
# ifdef _WIN32 |
3891 |
evpipe_init (EV_A); |
3892 |
|
3893 |
signal (w->signum, ev_sighandler); |
3894 |
# else |
3895 |
struct sigaction sa; |
3896 |
|
3897 |
evpipe_init (EV_A); |
3898 |
|
3899 |
sa.sa_handler = ev_sighandler; |
3900 |
sigfillset (&sa.sa_mask); |
3901 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
3902 |
sigaction (w->signum, &sa, 0); |
3903 |
|
3904 |
if (origflags & EVFLAG_NOSIGMASK) |
3905 |
{ |
3906 |
sigemptyset (&sa.sa_mask); |
3907 |
sigaddset (&sa.sa_mask, w->signum); |
3908 |
sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
3909 |
} |
3910 |
#endif |
3911 |
} |
3912 |
|
3913 |
EV_FREQUENT_CHECK; |
3914 |
} |
3915 |
|
3916 |
void noinline |
3917 |
ev_signal_stop (EV_P_ ev_signal *w) EV_THROW |
3918 |
{ |
3919 |
clear_pending (EV_A_ (W)w); |
3920 |
if (expect_false (!ev_is_active (w))) |
3921 |
return; |
3922 |
|
3923 |
EV_FREQUENT_CHECK; |
3924 |
|
3925 |
wlist_del (&signals [w->signum - 1].head, (WL)w); |
3926 |
ev_stop (EV_A_ (W)w); |
3927 |
|
3928 |
if (!signals [w->signum - 1].head) |
3929 |
{ |
3930 |
#if EV_MULTIPLICITY |
3931 |
signals [w->signum - 1].loop = 0; /* unattach from signal */ |
3932 |
#endif |
3933 |
#if EV_USE_SIGNALFD |
3934 |
if (sigfd >= 0) |
3935 |
{ |
3936 |
sigset_t ss; |
3937 |
|
3938 |
sigemptyset (&ss); |
3939 |
sigaddset (&ss, w->signum); |
3940 |
sigdelset (&sigfd_set, w->signum); |
3941 |
|
3942 |
signalfd (sigfd, &sigfd_set, 0); |
3943 |
sigprocmask (SIG_UNBLOCK, &ss, 0); |
3944 |
} |
3945 |
else |
3946 |
#endif |
3947 |
signal (w->signum, SIG_DFL); |
3948 |
} |
3949 |
|
3950 |
EV_FREQUENT_CHECK; |
3951 |
} |
3952 |
|
3953 |
#endif |
3954 |
|
3955 |
#if EV_CHILD_ENABLE |
3956 |
|
3957 |
void |
3958 |
ev_child_start (EV_P_ ev_child *w) EV_THROW |
3959 |
{ |
3960 |
#if EV_MULTIPLICITY |
3961 |
assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
3962 |
#endif |
3963 |
if (expect_false (ev_is_active (w))) |
3964 |
return; |
3965 |
|
3966 |
EV_FREQUENT_CHECK; |
3967 |
|
3968 |
ev_start (EV_A_ (W)w, 1); |
3969 |
wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
3970 |
|
3971 |
EV_FREQUENT_CHECK; |
3972 |
} |
3973 |
|
3974 |
void |
3975 |
ev_child_stop (EV_P_ ev_child *w) EV_THROW |
3976 |
{ |
3977 |
clear_pending (EV_A_ (W)w); |
3978 |
if (expect_false (!ev_is_active (w))) |
3979 |
return; |
3980 |
|
3981 |
EV_FREQUENT_CHECK; |
3982 |
|
3983 |
wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
3984 |
ev_stop (EV_A_ (W)w); |
3985 |
|
3986 |
EV_FREQUENT_CHECK; |
3987 |
} |
3988 |
|
3989 |
#endif |
3990 |
|
3991 |
#if EV_STAT_ENABLE |
3992 |
|
3993 |
# ifdef _WIN32 |
3994 |
# undef lstat |
3995 |
# define lstat(a,b) _stati64 (a,b) |
3996 |
# endif |
3997 |
|
3998 |
#define DEF_STAT_INTERVAL 5.0074891 |
3999 |
#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ |
4000 |
#define MIN_STAT_INTERVAL 0.1074891 |
4001 |
|
4002 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
4003 |
|
4004 |
#if EV_USE_INOTIFY |
4005 |
|
4006 |
/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
4007 |
# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
4008 |
|
4009 |
static void noinline |
4010 |
infy_add (EV_P_ ev_stat *w) |
4011 |
{ |
4012 |
w->wd = inotify_add_watch (fs_fd, w->path, |
4013 |
IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY |
4014 |
| IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO |
4015 |
| IN_DONT_FOLLOW | IN_MASK_ADD); |
4016 |
|
4017 |
if (w->wd >= 0) |
4018 |
{ |
4019 |
struct statfs sfs; |
4020 |
|
4021 |
/* now local changes will be tracked by inotify, but remote changes won't */ |
4022 |
/* unless the filesystem is known to be local, we therefore still poll */ |
4023 |
/* also do poll on <2.6.25, but with normal frequency */ |
4024 |
|
4025 |
if (!fs_2625) |
4026 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
4027 |
else if (!statfs (w->path, &sfs) |
4028 |
&& (sfs.f_type == 0x1373 /* devfs */ |
4029 |
|| sfs.f_type == 0x4006 /* fat */ |
4030 |
|| sfs.f_type == 0x4d44 /* msdos */ |
4031 |
|| sfs.f_type == 0xEF53 /* ext2/3 */ |
4032 |
|| sfs.f_type == 0x72b6 /* jffs2 */ |
4033 |
|| sfs.f_type == 0x858458f6 /* ramfs */ |
4034 |
|| sfs.f_type == 0x5346544e /* ntfs */ |
4035 |
|| sfs.f_type == 0x3153464a /* jfs */ |
4036 |
|| sfs.f_type == 0x9123683e /* btrfs */ |
4037 |
|| sfs.f_type == 0x52654973 /* reiser3 */ |
4038 |
|| sfs.f_type == 0x01021994 /* tmpfs */ |
4039 |
|| sfs.f_type == 0x58465342 /* xfs */)) |
4040 |
w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
4041 |
else |
4042 |
w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
4043 |
} |
4044 |
else |
4045 |
{ |
4046 |
/* can't use inotify, continue to stat */ |
4047 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
4048 |
|
4049 |
/* if path is not there, monitor some parent directory for speedup hints */ |
4050 |
/* note that exceeding the hardcoded path limit is not a correctness issue, */ |
4051 |
/* but an efficiency issue only */ |
4052 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
4053 |
{ |
4054 |
char path [4096]; |
4055 |
strcpy (path, w->path); |
4056 |
|
4057 |
do |
4058 |
{ |
4059 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
4060 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
4061 |
|
4062 |
char *pend = strrchr (path, '/'); |
4063 |
|
4064 |
if (!pend || pend == path) |
4065 |
break; |
4066 |
|
4067 |
*pend = 0; |
4068 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
4069 |
} |
4070 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
4071 |
} |
4072 |
} |
4073 |
|
4074 |
if (w->wd >= 0) |
4075 |
wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
4076 |
|
4077 |
/* now re-arm timer, if required */ |
4078 |
if (ev_is_active (&w->timer)) ev_ref (EV_A); |
4079 |
ev_timer_again (EV_A_ &w->timer); |
4080 |
if (ev_is_active (&w->timer)) ev_unref (EV_A); |
4081 |
} |
4082 |
|
4083 |
static void noinline |
4084 |
infy_del (EV_P_ ev_stat *w) |
4085 |
{ |
4086 |
int slot; |
4087 |
int wd = w->wd; |
4088 |
|
4089 |
if (wd < 0) |
4090 |
return; |
4091 |
|
4092 |
w->wd = -2; |
4093 |
slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); |
4094 |
wlist_del (&fs_hash [slot].head, (WL)w); |
4095 |
|
4096 |
/* remove this watcher, if others are watching it, they will rearm */ |
4097 |
inotify_rm_watch (fs_fd, wd); |
4098 |
} |
4099 |
|
4100 |
static void noinline |
4101 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
4102 |
{ |
4103 |
if (slot < 0) |
4104 |
/* overflow, need to check for all hash slots */ |
4105 |
for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
4106 |
infy_wd (EV_A_ slot, wd, ev); |
4107 |
else |
4108 |
{ |
4109 |
WL w_; |
4110 |
|
4111 |
for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) |
4112 |
{ |
4113 |
ev_stat *w = (ev_stat *)w_; |
4114 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
4115 |
|
4116 |
if (w->wd == wd || wd == -1) |
4117 |
{ |
4118 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
4119 |
{ |
4120 |
wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
4121 |
w->wd = -1; |
4122 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
4123 |
} |
4124 |
|
4125 |
stat_timer_cb (EV_A_ &w->timer, 0); |
4126 |
} |
4127 |
} |
4128 |
} |
4129 |
} |
4130 |
|
4131 |
static void |
4132 |
infy_cb (EV_P_ ev_io *w, int revents) |
4133 |
{ |
4134 |
char buf [EV_INOTIFY_BUFSIZE]; |
4135 |
int ofs; |
4136 |
int len = read (fs_fd, buf, sizeof (buf)); |
4137 |
|
4138 |
for (ofs = 0; ofs < len; ) |
4139 |
{ |
4140 |
struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
4141 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
4142 |
ofs += sizeof (struct inotify_event) + ev->len; |
4143 |
} |
4144 |
} |
4145 |
|
4146 |
inline_size void ecb_cold |
4147 |
ev_check_2625 (EV_P) |
4148 |
{ |
4149 |
/* kernels < 2.6.25 are borked |
4150 |
* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
4151 |
*/ |
4152 |
if (ev_linux_version () < 0x020619) |
4153 |
return; |
4154 |
|
4155 |
fs_2625 = 1; |
4156 |
} |
4157 |
|
4158 |
inline_size int |
4159 |
infy_newfd (void) |
4160 |
{ |
4161 |
#if defined IN_CLOEXEC && defined IN_NONBLOCK |
4162 |
int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
4163 |
if (fd >= 0) |
4164 |
return fd; |
4165 |
#endif |
4166 |
return inotify_init (); |
4167 |
} |
4168 |
|
4169 |
inline_size void |
4170 |
infy_init (EV_P) |
4171 |
{ |
4172 |
if (fs_fd != -2) |
4173 |
return; |
4174 |
|
4175 |
fs_fd = -1; |
4176 |
|
4177 |
ev_check_2625 (EV_A); |
4178 |
|
4179 |
fs_fd = infy_newfd (); |
4180 |
|
4181 |
if (fs_fd >= 0) |
4182 |
{ |
4183 |
fd_intern (fs_fd); |
4184 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
4185 |
ev_set_priority (&fs_w, EV_MAXPRI); |
4186 |
ev_io_start (EV_A_ &fs_w); |
4187 |
ev_unref (EV_A); |
4188 |
} |
4189 |
} |
4190 |
|
4191 |
inline_size void |
4192 |
infy_fork (EV_P) |
4193 |
{ |
4194 |
int slot; |
4195 |
|
4196 |
if (fs_fd < 0) |
4197 |
return; |
4198 |
|
4199 |
ev_ref (EV_A); |
4200 |
ev_io_stop (EV_A_ &fs_w); |
4201 |
close (fs_fd); |
4202 |
fs_fd = infy_newfd (); |
4203 |
|
4204 |
if (fs_fd >= 0) |
4205 |
{ |
4206 |
fd_intern (fs_fd); |
4207 |
ev_io_set (&fs_w, fs_fd, EV_READ); |
4208 |
ev_io_start (EV_A_ &fs_w); |
4209 |
ev_unref (EV_A); |
4210 |
} |
4211 |
|
4212 |
for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
4213 |
{ |
4214 |
WL w_ = fs_hash [slot].head; |
4215 |
fs_hash [slot].head = 0; |
4216 |
|
4217 |
while (w_) |
4218 |
{ |
4219 |
ev_stat *w = (ev_stat *)w_; |
4220 |
w_ = w_->next; /* lets us add this watcher */ |
4221 |
|
4222 |
w->wd = -1; |
4223 |
|
4224 |
if (fs_fd >= 0) |
4225 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
4226 |
else |
4227 |
{ |
4228 |
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
4229 |
if (ev_is_active (&w->timer)) ev_ref (EV_A); |
4230 |
ev_timer_again (EV_A_ &w->timer); |
4231 |
if (ev_is_active (&w->timer)) ev_unref (EV_A); |
4232 |
} |
4233 |
} |
4234 |
} |
4235 |
} |
4236 |
|
4237 |
#endif |
4238 |
|
4239 |
#ifdef _WIN32 |
4240 |
# define EV_LSTAT(p,b) _stati64 (p, b) |
4241 |
#else |
4242 |
# define EV_LSTAT(p,b) lstat (p, b) |
4243 |
#endif |
4244 |
|
4245 |
void |
4246 |
ev_stat_stat (EV_P_ ev_stat *w) EV_THROW |
4247 |
{ |
4248 |
if (lstat (w->path, &w->attr) < 0) |
4249 |
w->attr.st_nlink = 0; |
4250 |
else if (!w->attr.st_nlink) |
4251 |
w->attr.st_nlink = 1; |
4252 |
} |
4253 |
|
4254 |
static void noinline |
4255 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
4256 |
{ |
4257 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
4258 |
|
4259 |
ev_statdata prev = w->attr; |
4260 |
ev_stat_stat (EV_A_ w); |
4261 |
|
4262 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
4263 |
if ( |
4264 |
prev.st_dev != w->attr.st_dev |
4265 |
|| prev.st_ino != w->attr.st_ino |
4266 |
|| prev.st_mode != w->attr.st_mode |
4267 |
|| prev.st_nlink != w->attr.st_nlink |
4268 |
|| prev.st_uid != w->attr.st_uid |
4269 |
|| prev.st_gid != w->attr.st_gid |
4270 |
|| prev.st_rdev != w->attr.st_rdev |
4271 |
|| prev.st_size != w->attr.st_size |
4272 |
|| prev.st_atime != w->attr.st_atime |
4273 |
|| prev.st_mtime != w->attr.st_mtime |
4274 |
|| prev.st_ctime != w->attr.st_ctime |
4275 |
) { |
4276 |
/* we only update w->prev on actual differences */ |
4277 |
/* in case we test more often than invoke the callback, */ |
4278 |
/* to ensure that prev is always different to attr */ |
4279 |
w->prev = prev; |
4280 |
|
4281 |
#if EV_USE_INOTIFY |
4282 |
if (fs_fd >= 0) |
4283 |
{ |
4284 |
infy_del (EV_A_ w); |
4285 |
infy_add (EV_A_ w); |
4286 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
4287 |
} |
4288 |
#endif |
4289 |
|
4290 |
ev_feed_event (EV_A_ w, EV_STAT); |
4291 |
} |
4292 |
} |
4293 |
|
4294 |
void |
4295 |
ev_stat_start (EV_P_ ev_stat *w) EV_THROW |
4296 |
{ |
4297 |
if (expect_false (ev_is_active (w))) |
4298 |
return; |
4299 |
|
4300 |
ev_stat_stat (EV_A_ w); |
4301 |
|
4302 |
if (w->interval < MIN_STAT_INTERVAL && w->interval) |
4303 |
w->interval = MIN_STAT_INTERVAL; |
4304 |
|
4305 |
ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); |
4306 |
ev_set_priority (&w->timer, ev_priority (w)); |
4307 |
|
4308 |
#if EV_USE_INOTIFY |
4309 |
infy_init (EV_A); |
4310 |
|
4311 |
if (fs_fd >= 0) |
4312 |
infy_add (EV_A_ w); |
4313 |
else |
4314 |
#endif |
4315 |
{ |
4316 |
ev_timer_again (EV_A_ &w->timer); |
4317 |
ev_unref (EV_A); |
4318 |
} |
4319 |
|
4320 |
ev_start (EV_A_ (W)w, 1); |
4321 |
|
4322 |
EV_FREQUENT_CHECK; |
4323 |
} |
4324 |
|
4325 |
void |
4326 |
ev_stat_stop (EV_P_ ev_stat *w) EV_THROW |
4327 |
{ |
4328 |
clear_pending (EV_A_ (W)w); |
4329 |
if (expect_false (!ev_is_active (w))) |
4330 |
return; |
4331 |
|
4332 |
EV_FREQUENT_CHECK; |
4333 |
|
4334 |
#if EV_USE_INOTIFY |
4335 |
infy_del (EV_A_ w); |
4336 |
#endif |
4337 |
|
4338 |
if (ev_is_active (&w->timer)) |
4339 |
{ |
4340 |
ev_ref (EV_A); |
4341 |
ev_timer_stop (EV_A_ &w->timer); |
4342 |
} |
4343 |
|
4344 |
ev_stop (EV_A_ (W)w); |
4345 |
|
4346 |
EV_FREQUENT_CHECK; |
4347 |
} |
4348 |
#endif |
4349 |
|
4350 |
#if EV_IDLE_ENABLE |
4351 |
void |
4352 |
ev_idle_start (EV_P_ ev_idle *w) EV_THROW |
4353 |
{ |
4354 |
if (expect_false (ev_is_active (w))) |
4355 |
return; |
4356 |
|
4357 |
pri_adjust (EV_A_ (W)w); |
4358 |
|
4359 |
EV_FREQUENT_CHECK; |
4360 |
|
4361 |
{ |
4362 |
int active = ++idlecnt [ABSPRI (w)]; |
4363 |
|
4364 |
++idleall; |
4365 |
ev_start (EV_A_ (W)w, active); |
4366 |
|
4367 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
4368 |
idles [ABSPRI (w)][active - 1] = w; |
4369 |
} |
4370 |
|
4371 |
EV_FREQUENT_CHECK; |
4372 |
} |
4373 |
|
4374 |
void |
4375 |
ev_idle_stop (EV_P_ ev_idle *w) EV_THROW |
4376 |
{ |
4377 |
clear_pending (EV_A_ (W)w); |
4378 |
if (expect_false (!ev_is_active (w))) |
4379 |
return; |
4380 |
|
4381 |
EV_FREQUENT_CHECK; |
4382 |
|
4383 |
{ |
4384 |
int active = ev_active (w); |
4385 |
|
4386 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
4387 |
ev_active (idles [ABSPRI (w)][active - 1]) = active; |
4388 |
|
4389 |
ev_stop (EV_A_ (W)w); |
4390 |
--idleall; |
4391 |
} |
4392 |
|
4393 |
EV_FREQUENT_CHECK; |
4394 |
} |
4395 |
#endif |
4396 |
|
4397 |
#if EV_PREPARE_ENABLE |
4398 |
void |
4399 |
ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW |
4400 |
{ |
4401 |
if (expect_false (ev_is_active (w))) |
4402 |
return; |
4403 |
|
4404 |
EV_FREQUENT_CHECK; |
4405 |
|
4406 |
ev_start (EV_A_ (W)w, ++preparecnt); |
4407 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
4408 |
prepares [preparecnt - 1] = w; |
4409 |
|
4410 |
EV_FREQUENT_CHECK; |
4411 |
} |
4412 |
|
4413 |
void |
4414 |
ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW |
4415 |
{ |
4416 |
clear_pending (EV_A_ (W)w); |
4417 |
if (expect_false (!ev_is_active (w))) |
4418 |
return; |
4419 |
|
4420 |
EV_FREQUENT_CHECK; |
4421 |
|
4422 |
{ |
4423 |
int active = ev_active (w); |
4424 |
|
4425 |
prepares [active - 1] = prepares [--preparecnt]; |
4426 |
ev_active (prepares [active - 1]) = active; |
4427 |
} |
4428 |
|
4429 |
ev_stop (EV_A_ (W)w); |
4430 |
|
4431 |
EV_FREQUENT_CHECK; |
4432 |
} |
4433 |
#endif |
4434 |
|
4435 |
#if EV_CHECK_ENABLE |
4436 |
void |
4437 |
ev_check_start (EV_P_ ev_check *w) EV_THROW |
4438 |
{ |
4439 |
if (expect_false (ev_is_active (w))) |
4440 |
return; |
4441 |
|
4442 |
EV_FREQUENT_CHECK; |
4443 |
|
4444 |
ev_start (EV_A_ (W)w, ++checkcnt); |
4445 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
4446 |
checks [checkcnt - 1] = w; |
4447 |
|
4448 |
EV_FREQUENT_CHECK; |
4449 |
} |
4450 |
|
4451 |
void |
4452 |
ev_check_stop (EV_P_ ev_check *w) EV_THROW |
4453 |
{ |
4454 |
clear_pending (EV_A_ (W)w); |
4455 |
if (expect_false (!ev_is_active (w))) |
4456 |
return; |
4457 |
|
4458 |
EV_FREQUENT_CHECK; |
4459 |
|
4460 |
{ |
4461 |
int active = ev_active (w); |
4462 |
|
4463 |
checks [active - 1] = checks [--checkcnt]; |
4464 |
ev_active (checks [active - 1]) = active; |
4465 |
} |
4466 |
|
4467 |
ev_stop (EV_A_ (W)w); |
4468 |
|
4469 |
EV_FREQUENT_CHECK; |
4470 |
} |
4471 |
#endif |
4472 |
|
4473 |
#if EV_EMBED_ENABLE |
4474 |
void noinline |
4475 |
ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW |
4476 |
{ |
4477 |
ev_run (w->other, EVRUN_NOWAIT); |
4478 |
} |
4479 |
|
4480 |
static void |
4481 |
embed_io_cb (EV_P_ ev_io *io, int revents) |
4482 |
{ |
4483 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
4484 |
|
4485 |
if (ev_cb (w)) |
4486 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
4487 |
else |
4488 |
ev_run (w->other, EVRUN_NOWAIT); |
4489 |
} |
4490 |
|
4491 |
static void |
4492 |
embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
4493 |
{ |
4494 |
ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
4495 |
|
4496 |
{ |
4497 |
EV_P = w->other; |
4498 |
|
4499 |
while (fdchangecnt) |
4500 |
{ |
4501 |
fd_reify (EV_A); |
4502 |
ev_run (EV_A_ EVRUN_NOWAIT); |
4503 |
} |
4504 |
} |
4505 |
} |
4506 |
|
4507 |
static void |
4508 |
embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) |
4509 |
{ |
4510 |
ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); |
4511 |
|
4512 |
ev_embed_stop (EV_A_ w); |
4513 |
|
4514 |
{ |
4515 |
EV_P = w->other; |
4516 |
|
4517 |
ev_loop_fork (EV_A); |
4518 |
ev_run (EV_A_ EVRUN_NOWAIT); |
4519 |
} |
4520 |
|
4521 |
ev_embed_start (EV_A_ w); |
4522 |
} |
4523 |
|
4524 |
#if 0 |
4525 |
static void |
4526 |
embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
4527 |
{ |
4528 |
ev_idle_stop (EV_A_ idle); |
4529 |
} |
4530 |
#endif |
4531 |
|
4532 |
void |
4533 |
ev_embed_start (EV_P_ ev_embed *w) EV_THROW |
4534 |
{ |
4535 |
if (expect_false (ev_is_active (w))) |
4536 |
return; |
4537 |
|
4538 |
{ |
4539 |
EV_P = w->other; |
4540 |
assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
4541 |
ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
4542 |
} |
4543 |
|
4544 |
EV_FREQUENT_CHECK; |
4545 |
|
4546 |
ev_set_priority (&w->io, ev_priority (w)); |
4547 |
ev_io_start (EV_A_ &w->io); |
4548 |
|
4549 |
ev_prepare_init (&w->prepare, embed_prepare_cb); |
4550 |
ev_set_priority (&w->prepare, EV_MINPRI); |
4551 |
ev_prepare_start (EV_A_ &w->prepare); |
4552 |
|
4553 |
ev_fork_init (&w->fork, embed_fork_cb); |
4554 |
ev_fork_start (EV_A_ &w->fork); |
4555 |
|
4556 |
/*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
4557 |
|
4558 |
ev_start (EV_A_ (W)w, 1); |
4559 |
|
4560 |
EV_FREQUENT_CHECK; |
4561 |
} |
4562 |
|
4563 |
void |
4564 |
ev_embed_stop (EV_P_ ev_embed *w) EV_THROW |
4565 |
{ |
4566 |
clear_pending (EV_A_ (W)w); |
4567 |
if (expect_false (!ev_is_active (w))) |
4568 |
return; |
4569 |
|
4570 |
EV_FREQUENT_CHECK; |
4571 |
|
4572 |
ev_io_stop (EV_A_ &w->io); |
4573 |
ev_prepare_stop (EV_A_ &w->prepare); |
4574 |
ev_fork_stop (EV_A_ &w->fork); |
4575 |
|
4576 |
ev_stop (EV_A_ (W)w); |
4577 |
|
4578 |
EV_FREQUENT_CHECK; |
4579 |
} |
4580 |
#endif |
4581 |
|
4582 |
#if EV_FORK_ENABLE |
4583 |
void |
4584 |
ev_fork_start (EV_P_ ev_fork *w) EV_THROW |
4585 |
{ |
4586 |
if (expect_false (ev_is_active (w))) |
4587 |
return; |
4588 |
|
4589 |
EV_FREQUENT_CHECK; |
4590 |
|
4591 |
ev_start (EV_A_ (W)w, ++forkcnt); |
4592 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
4593 |
forks [forkcnt - 1] = w; |
4594 |
|
4595 |
EV_FREQUENT_CHECK; |
4596 |
} |
4597 |
|
4598 |
void |
4599 |
ev_fork_stop (EV_P_ ev_fork *w) EV_THROW |
4600 |
{ |
4601 |
clear_pending (EV_A_ (W)w); |
4602 |
if (expect_false (!ev_is_active (w))) |
4603 |
return; |
4604 |
|
4605 |
EV_FREQUENT_CHECK; |
4606 |
|
4607 |
{ |
4608 |
int active = ev_active (w); |
4609 |
|
4610 |
forks [active - 1] = forks [--forkcnt]; |
4611 |
ev_active (forks [active - 1]) = active; |
4612 |
} |
4613 |
|
4614 |
ev_stop (EV_A_ (W)w); |
4615 |
|
4616 |
EV_FREQUENT_CHECK; |
4617 |
} |
4618 |
#endif |
4619 |
|
4620 |
#if EV_CLEANUP_ENABLE |
4621 |
void |
4622 |
ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW |
4623 |
{ |
4624 |
if (expect_false (ev_is_active (w))) |
4625 |
return; |
4626 |
|
4627 |
EV_FREQUENT_CHECK; |
4628 |
|
4629 |
ev_start (EV_A_ (W)w, ++cleanupcnt); |
4630 |
array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
4631 |
cleanups [cleanupcnt - 1] = w; |
4632 |
|
4633 |
/* cleanup watchers should never keep a refcount on the loop */ |
4634 |
ev_unref (EV_A); |
4635 |
EV_FREQUENT_CHECK; |
4636 |
} |
4637 |
|
4638 |
void |
4639 |
ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW |
4640 |
{ |
4641 |
clear_pending (EV_A_ (W)w); |
4642 |
if (expect_false (!ev_is_active (w))) |
4643 |
return; |
4644 |
|
4645 |
EV_FREQUENT_CHECK; |
4646 |
ev_ref (EV_A); |
4647 |
|
4648 |
{ |
4649 |
int active = ev_active (w); |
4650 |
|
4651 |
cleanups [active - 1] = cleanups [--cleanupcnt]; |
4652 |
ev_active (cleanups [active - 1]) = active; |
4653 |
} |
4654 |
|
4655 |
ev_stop (EV_A_ (W)w); |
4656 |
|
4657 |
EV_FREQUENT_CHECK; |
4658 |
} |
4659 |
#endif |
4660 |
|
4661 |
#if EV_ASYNC_ENABLE |
4662 |
void |
4663 |
ev_async_start (EV_P_ ev_async *w) EV_THROW |
4664 |
{ |
4665 |
if (expect_false (ev_is_active (w))) |
4666 |
return; |
4667 |
|
4668 |
w->sent = 0; |
4669 |
|
4670 |
evpipe_init (EV_A); |
4671 |
|
4672 |
EV_FREQUENT_CHECK; |
4673 |
|
4674 |
ev_start (EV_A_ (W)w, ++asynccnt); |
4675 |
array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
4676 |
asyncs [asynccnt - 1] = w; |
4677 |
|
4678 |
EV_FREQUENT_CHECK; |
4679 |
} |
4680 |
|
4681 |
void |
4682 |
ev_async_stop (EV_P_ ev_async *w) EV_THROW |
4683 |
{ |
4684 |
clear_pending (EV_A_ (W)w); |
4685 |
if (expect_false (!ev_is_active (w))) |
4686 |
return; |
4687 |
|
4688 |
EV_FREQUENT_CHECK; |
4689 |
|
4690 |
{ |
4691 |
int active = ev_active (w); |
4692 |
|
4693 |
asyncs [active - 1] = asyncs [--asynccnt]; |
4694 |
ev_active (asyncs [active - 1]) = active; |
4695 |
} |
4696 |
|
4697 |
ev_stop (EV_A_ (W)w); |
4698 |
|
4699 |
EV_FREQUENT_CHECK; |
4700 |
} |
4701 |
|
4702 |
void |
4703 |
ev_async_send (EV_P_ ev_async *w) EV_THROW |
4704 |
{ |
4705 |
w->sent = 1; |
4706 |
evpipe_write (EV_A_ &async_pending); |
4707 |
} |
4708 |
#endif |
4709 |
|
4710 |
/*****************************************************************************/ |
4711 |
|
4712 |
struct ev_once |
4713 |
{ |
4714 |
ev_io io; |
4715 |
ev_timer to; |
4716 |
void (*cb)(int revents, void *arg); |
4717 |
void *arg; |
4718 |
}; |
4719 |
|
4720 |
static void |
4721 |
once_cb (EV_P_ struct ev_once *once, int revents) |
4722 |
{ |
4723 |
void (*cb)(int revents, void *arg) = once->cb; |
4724 |
void *arg = once->arg; |
4725 |
|
4726 |
ev_io_stop (EV_A_ &once->io); |
4727 |
ev_timer_stop (EV_A_ &once->to); |
4728 |
ev_free (once); |
4729 |
|
4730 |
cb (revents, arg); |
4731 |
} |
4732 |
|
4733 |
static void |
4734 |
once_cb_io (EV_P_ ev_io *w, int revents) |
4735 |
{ |
4736 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); |
4737 |
|
4738 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); |
4739 |
} |
4740 |
|
4741 |
static void |
4742 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
4743 |
{ |
4744 |
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); |
4745 |
|
4746 |
once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); |
4747 |
} |
4748 |
|
4749 |
void |
4750 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW |
4751 |
{ |
4752 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
4753 |
|
4754 |
if (expect_false (!once)) |
4755 |
{ |
4756 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg); |
4757 |
return; |
4758 |
} |
4759 |
|
4760 |
once->cb = cb; |
4761 |
once->arg = arg; |
4762 |
|
4763 |
ev_init (&once->io, once_cb_io); |
4764 |
if (fd >= 0) |
4765 |
{ |
4766 |
ev_io_set (&once->io, fd, events); |
4767 |
ev_io_start (EV_A_ &once->io); |
4768 |
} |
4769 |
|
4770 |
ev_init (&once->to, once_cb_to); |
4771 |
if (timeout >= 0.) |
4772 |
{ |
4773 |
ev_timer_set (&once->to, timeout, 0.); |
4774 |
ev_timer_start (EV_A_ &once->to); |
4775 |
} |
4776 |
} |
4777 |
|
4778 |
/*****************************************************************************/ |
4779 |
|
4780 |
#if EV_WALK_ENABLE |
4781 |
void ecb_cold |
4782 |
ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW |
4783 |
{ |
4784 |
int i, j; |
4785 |
ev_watcher_list *wl, *wn; |
4786 |
|
4787 |
if (types & (EV_IO | EV_EMBED)) |
4788 |
for (i = 0; i < anfdmax; ++i) |
4789 |
for (wl = anfds [i].head; wl; ) |
4790 |
{ |
4791 |
wn = wl->next; |
4792 |
|
4793 |
#if EV_EMBED_ENABLE |
4794 |
if (ev_cb ((ev_io *)wl) == embed_io_cb) |
4795 |
{ |
4796 |
if (types & EV_EMBED) |
4797 |
cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); |
4798 |
} |
4799 |
else |
4800 |
#endif |
4801 |
#if EV_USE_INOTIFY |
4802 |
if (ev_cb ((ev_io *)wl) == infy_cb) |
4803 |
; |
4804 |
else |
4805 |
#endif |
4806 |
if ((ev_io *)wl != &pipe_w) |
4807 |
if (types & EV_IO) |
4808 |
cb (EV_A_ EV_IO, wl); |
4809 |
|
4810 |
wl = wn; |
4811 |
} |
4812 |
|
4813 |
if (types & (EV_TIMER | EV_STAT)) |
4814 |
for (i = timercnt + HEAP0; i-- > HEAP0; ) |
4815 |
#if EV_STAT_ENABLE |
4816 |
/*TODO: timer is not always active*/ |
4817 |
if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) |
4818 |
{ |
4819 |
if (types & EV_STAT) |
4820 |
cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); |
4821 |
} |
4822 |
else |
4823 |
#endif |
4824 |
if (types & EV_TIMER) |
4825 |
cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); |
4826 |
|
4827 |
#if EV_PERIODIC_ENABLE |
4828 |
if (types & EV_PERIODIC) |
4829 |
for (i = periodiccnt + HEAP0; i-- > HEAP0; ) |
4830 |
cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); |
4831 |
#endif |
4832 |
|
4833 |
#if EV_IDLE_ENABLE |
4834 |
if (types & EV_IDLE) |
4835 |
for (j = NUMPRI; j--; ) |
4836 |
for (i = idlecnt [j]; i--; ) |
4837 |
cb (EV_A_ EV_IDLE, idles [j][i]); |
4838 |
#endif |
4839 |
|
4840 |
#if EV_FORK_ENABLE |
4841 |
if (types & EV_FORK) |
4842 |
for (i = forkcnt; i--; ) |
4843 |
if (ev_cb (forks [i]) != embed_fork_cb) |
4844 |
cb (EV_A_ EV_FORK, forks [i]); |
4845 |
#endif |
4846 |
|
4847 |
#if EV_ASYNC_ENABLE |
4848 |
if (types & EV_ASYNC) |
4849 |
for (i = asynccnt; i--; ) |
4850 |
cb (EV_A_ EV_ASYNC, asyncs [i]); |
4851 |
#endif |
4852 |
|
4853 |
#if EV_PREPARE_ENABLE |
4854 |
if (types & EV_PREPARE) |
4855 |
for (i = preparecnt; i--; ) |
4856 |
# if EV_EMBED_ENABLE |
4857 |
if (ev_cb (prepares [i]) != embed_prepare_cb) |
4858 |
# endif |
4859 |
cb (EV_A_ EV_PREPARE, prepares [i]); |
4860 |
#endif |
4861 |
|
4862 |
#if EV_CHECK_ENABLE |
4863 |
if (types & EV_CHECK) |
4864 |
for (i = checkcnt; i--; ) |
4865 |
cb (EV_A_ EV_CHECK, checks [i]); |
4866 |
#endif |
4867 |
|
4868 |
#if EV_SIGNAL_ENABLE |
4869 |
if (types & EV_SIGNAL) |
4870 |
for (i = 0; i < EV_NSIG - 1; ++i) |
4871 |
for (wl = signals [i].head; wl; ) |
4872 |
{ |
4873 |
wn = wl->next; |
4874 |
cb (EV_A_ EV_SIGNAL, wl); |
4875 |
wl = wn; |
4876 |
} |
4877 |
#endif |
4878 |
|
4879 |
#if EV_CHILD_ENABLE |
4880 |
if (types & EV_CHILD) |
4881 |
for (i = (EV_PID_HASHSIZE); i--; ) |
4882 |
for (wl = childs [i]; wl; ) |
4883 |
{ |
4884 |
wn = wl->next; |
4885 |
cb (EV_A_ EV_CHILD, wl); |
4886 |
wl = wn; |
4887 |
} |
4888 |
#endif |
4889 |
/* EV_STAT 0x00001000 /* stat data changed */ |
4890 |
/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
4891 |
} |
4892 |
#endif |
4893 |
|
4894 |
#if EV_MULTIPLICITY |
4895 |
#include "ev_wrap.h" |
4896 |
#endif |
4897 |
|