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/* |
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* libev event processing core, watcher management |
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* |
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* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without modifica- |
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* tion, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* the GNU General Public License ("GPL") version 2 or any later version, |
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* in which case the provisions of the GPL are applicable instead of |
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* the above. If you wish to allow the use of your version of this file |
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* only under the terms of the GPL and not to allow others to use your |
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* version of this file under the BSD license, indicate your decision |
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* by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL. If you do not delete the |
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* provisions above, a recipient may use your version of this file under |
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* either the BSD or the GPL. |
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*/ |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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#ifndef EV_STANDALONE |
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# ifdef EV_CONFIG_H |
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# include EV_CONFIG_H |
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# else |
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# include "config.h" |
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# endif |
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|
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# if HAVE_CLOCK_GETTIME |
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# ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 1 |
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# endif |
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# ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 1 |
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# endif |
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# else |
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# ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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# endif |
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# ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_NANOSLEEP |
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# if HAVE_NANOSLEEP |
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# define EV_USE_NANOSLEEP 1 |
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# else |
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# define EV_USE_NANOSLEEP 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_SELECT |
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# if HAVE_SELECT && HAVE_SYS_SELECT_H |
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# define EV_USE_SELECT 1 |
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# else |
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# define EV_USE_SELECT 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_POLL |
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# if HAVE_POLL && HAVE_POLL_H |
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# define EV_USE_POLL 1 |
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# else |
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# define EV_USE_POLL 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_EPOLL |
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# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H |
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# define EV_USE_EPOLL 1 |
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# else |
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# define EV_USE_EPOLL 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_KQUEUE |
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# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H |
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# define EV_USE_KQUEUE 1 |
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# else |
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# define EV_USE_KQUEUE 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_PORT |
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# if HAVE_PORT_H && HAVE_PORT_CREATE |
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# define EV_USE_PORT 1 |
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# else |
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# define EV_USE_PORT 0 |
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# endif |
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# endif |
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|
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# ifndef EV_USE_INOTIFY |
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# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H |
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# define EV_USE_INOTIFY 1 |
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# else |
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# define EV_USE_INOTIFY 0 |
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# endif |
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# endif |
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|
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#endif |
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|
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#include <math.h> |
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#include <stdlib.h> |
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#include <fcntl.h> |
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#include <stddef.h> |
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|
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#include <stdio.h> |
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|
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#include <assert.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <time.h> |
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|
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#include <signal.h> |
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|
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#ifdef EV_H |
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# include EV_H |
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#else |
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# include "ev.h" |
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#endif |
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|
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#ifndef _WIN32 |
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# include <sys/time.h> |
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# include <sys/wait.h> |
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# include <unistd.h> |
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#else |
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# define WIN32_LEAN_AND_MEAN |
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# include <windows.h> |
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# ifndef EV_SELECT_IS_WINSOCKET |
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# define EV_SELECT_IS_WINSOCKET 1 |
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# endif |
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#endif |
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|
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/**/ |
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|
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#ifndef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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#endif |
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|
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#ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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|
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#ifndef EV_USE_NANOSLEEP |
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# define EV_USE_NANOSLEEP 0 |
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#endif |
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|
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#ifndef EV_USE_SELECT |
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# define EV_USE_SELECT 1 |
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#endif |
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|
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#ifndef EV_USE_POLL |
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# ifdef _WIN32 |
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# define EV_USE_POLL 0 |
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# else |
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# define EV_USE_POLL 1 |
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# endif |
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#endif |
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|
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#ifndef EV_USE_EPOLL |
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# define EV_USE_EPOLL 0 |
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#endif |
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|
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#ifndef EV_USE_KQUEUE |
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# define EV_USE_KQUEUE 0 |
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#endif |
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|
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#ifndef EV_USE_PORT |
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# define EV_USE_PORT 0 |
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#endif |
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|
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#ifndef EV_USE_INOTIFY |
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# define EV_USE_INOTIFY 0 |
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#endif |
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|
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#ifndef EV_PID_HASHSIZE |
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# if EV_MINIMAL |
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# define EV_PID_HASHSIZE 1 |
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# else |
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# define EV_PID_HASHSIZE 16 |
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# endif |
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#endif |
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|
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#ifndef EV_INOTIFY_HASHSIZE |
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# if EV_MINIMAL |
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# define EV_INOTIFY_HASHSIZE 1 |
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# else |
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# define EV_INOTIFY_HASHSIZE 16 |
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# endif |
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#endif |
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|
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/**/ |
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|
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#ifndef CLOCK_MONOTONIC |
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# undef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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#endif |
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|
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#ifndef CLOCK_REALTIME |
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# undef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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|
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#if !EV_STAT_ENABLE |
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# undef EV_USE_INOTIFY |
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# define EV_USE_INOTIFY 0 |
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#endif |
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|
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#if !EV_USE_NANOSLEEP |
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# ifndef _WIN32 |
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# include <sys/select.h> |
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# endif |
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#endif |
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|
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#if EV_USE_INOTIFY |
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# include <sys/inotify.h> |
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#endif |
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|
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#if EV_SELECT_IS_WINSOCKET |
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# include <winsock.h> |
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#endif |
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|
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/**/ |
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|
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/* |
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* This is used to avoid floating point rounding problems. |
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* It is added to ev_rt_now when scheduling periodics |
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* to ensure progress, time-wise, even when rounding |
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* errors are against us. |
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* This value is good at least till the year 4000. |
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* Better solutions welcome. |
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*/ |
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#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
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|
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#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
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#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
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/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ |
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|
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#if __GNUC__ >= 4 |
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# define expect(expr,value) __builtin_expect ((expr),(value)) |
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# define noinline __attribute__ ((noinline)) |
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#else |
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# define expect(expr,value) (expr) |
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# define noinline |
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# if __STDC_VERSION__ < 199901L |
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# define inline |
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# endif |
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#endif |
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|
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#define expect_false(expr) expect ((expr) != 0, 0) |
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#define expect_true(expr) expect ((expr) != 0, 1) |
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#define inline_size static inline |
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|
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#if EV_MINIMAL |
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# define inline_speed static noinline |
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#else |
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# define inline_speed static inline |
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#endif |
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|
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#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
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|
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#define EMPTY /* required for microsofts broken pseudo-c compiler */ |
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#define EMPTY2(a,b) /* used to suppress some warnings */ |
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|
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typedef ev_watcher *W; |
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typedef ev_watcher_list *WL; |
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typedef ev_watcher_time *WT; |
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|
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#if EV_USE_MONOTONIC |
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/* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
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/* giving it a reasonably high chance of working on typical architetcures */ |
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static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
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#endif |
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|
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#ifdef _WIN32 |
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# include "ev_win32.c" |
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#endif |
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|
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/*****************************************************************************/ |
304 |
|
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static void (*syserr_cb)(const char *msg); |
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|
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void |
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ev_set_syserr_cb (void (*cb)(const char *msg)) |
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{ |
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syserr_cb = cb; |
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} |
312 |
|
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static void noinline |
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syserr (const char *msg) |
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{ |
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if (!msg) |
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msg = "(libev) system error"; |
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|
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if (syserr_cb) |
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syserr_cb (msg); |
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else |
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{ |
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perror (msg); |
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abort (); |
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} |
326 |
} |
327 |
|
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static void *(*alloc)(void *ptr, long size); |
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|
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void |
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ev_set_allocator (void *(*cb)(void *ptr, long size)) |
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{ |
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alloc = cb; |
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} |
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|
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inline_speed void * |
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ev_realloc (void *ptr, long size) |
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{ |
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ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); |
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|
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if (!ptr && size) |
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{ |
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fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
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abort (); |
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} |
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|
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return ptr; |
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} |
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|
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#define ev_malloc(size) ev_realloc (0, (size)) |
351 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
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|
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/*****************************************************************************/ |
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|
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typedef struct |
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{ |
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WL head; |
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unsigned char events; |
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unsigned char reify; |
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#if EV_SELECT_IS_WINSOCKET |
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SOCKET handle; |
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#endif |
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} ANFD; |
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|
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typedef struct |
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{ |
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W w; |
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int events; |
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} ANPENDING; |
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|
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#if EV_USE_INOTIFY |
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typedef struct |
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{ |
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WL head; |
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} ANFS; |
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#endif |
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|
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#if EV_MULTIPLICITY |
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|
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struct ev_loop |
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{ |
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ev_tstamp ev_rt_now; |
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#define ev_rt_now ((loop)->ev_rt_now) |
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#define VAR(name,decl) decl; |
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#include "ev_vars.h" |
386 |
#undef VAR |
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}; |
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#include "ev_wrap.h" |
389 |
|
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static struct ev_loop default_loop_struct; |
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struct ev_loop *ev_default_loop_ptr; |
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|
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#else |
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|
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ev_tstamp ev_rt_now; |
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#define VAR(name,decl) static decl; |
397 |
#include "ev_vars.h" |
398 |
#undef VAR |
399 |
|
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static int ev_default_loop_ptr; |
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|
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#endif |
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|
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/*****************************************************************************/ |
405 |
|
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ev_tstamp |
407 |
ev_time (void) |
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{ |
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#if EV_USE_REALTIME |
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struct timespec ts; |
411 |
clock_gettime (CLOCK_REALTIME, &ts); |
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return ts.tv_sec + ts.tv_nsec * 1e-9; |
413 |
#else |
414 |
struct timeval tv; |
415 |
gettimeofday (&tv, 0); |
416 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
417 |
#endif |
418 |
} |
419 |
|
420 |
ev_tstamp inline_size |
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get_clock (void) |
422 |
{ |
423 |
#if EV_USE_MONOTONIC |
424 |
if (expect_true (have_monotonic)) |
425 |
{ |
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struct timespec ts; |
427 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
428 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
429 |
} |
430 |
#endif |
431 |
|
432 |
return ev_time (); |
433 |
} |
434 |
|
435 |
#if EV_MULTIPLICITY |
436 |
ev_tstamp |
437 |
ev_now (EV_P) |
438 |
{ |
439 |
return ev_rt_now; |
440 |
} |
441 |
#endif |
442 |
|
443 |
void |
444 |
ev_sleep (ev_tstamp delay) |
445 |
{ |
446 |
if (delay > 0.) |
447 |
{ |
448 |
#if EV_USE_NANOSLEEP |
449 |
struct timespec ts; |
450 |
|
451 |
ts.tv_sec = (time_t)delay; |
452 |
ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); |
453 |
|
454 |
nanosleep (&ts, 0); |
455 |
#elif defined(_WIN32) |
456 |
Sleep (delay * 1e3); |
457 |
#else |
458 |
struct timeval tv; |
459 |
|
460 |
tv.tv_sec = (time_t)delay; |
461 |
tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); |
462 |
|
463 |
select (0, 0, 0, 0, &tv); |
464 |
#endif |
465 |
} |
466 |
} |
467 |
|
468 |
/*****************************************************************************/ |
469 |
|
470 |
int inline_size |
471 |
array_nextsize (int elem, int cur, int cnt) |
472 |
{ |
473 |
int ncur = cur + 1; |
474 |
|
475 |
do |
476 |
ncur <<= 1; |
477 |
while (cnt > ncur); |
478 |
|
479 |
/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ |
480 |
if (elem * ncur > 4096) |
481 |
{ |
482 |
ncur *= elem; |
483 |
ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; |
484 |
ncur = ncur - sizeof (void *) * 4; |
485 |
ncur /= elem; |
486 |
} |
487 |
|
488 |
return ncur; |
489 |
} |
490 |
|
491 |
static noinline void * |
492 |
array_realloc (int elem, void *base, int *cur, int cnt) |
493 |
{ |
494 |
*cur = array_nextsize (elem, *cur, cnt); |
495 |
return ev_realloc (base, elem * *cur); |
496 |
} |
497 |
|
498 |
#define array_needsize(type,base,cur,cnt,init) \ |
499 |
if (expect_false ((cnt) > (cur))) \ |
500 |
{ \ |
501 |
int ocur_ = (cur); \ |
502 |
(base) = (type *)array_realloc \ |
503 |
(sizeof (type), (base), &(cur), (cnt)); \ |
504 |
init ((base) + (ocur_), (cur) - ocur_); \ |
505 |
} |
506 |
|
507 |
#if 0 |
508 |
#define array_slim(type,stem) \ |
509 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
510 |
{ \ |
511 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
512 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
513 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
514 |
} |
515 |
#endif |
516 |
|
517 |
#define array_free(stem, idx) \ |
518 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
519 |
|
520 |
/*****************************************************************************/ |
521 |
|
522 |
void noinline |
523 |
ev_feed_event (EV_P_ void *w, int revents) |
524 |
{ |
525 |
W w_ = (W)w; |
526 |
int pri = ABSPRI (w_); |
527 |
|
528 |
if (expect_false (w_->pending)) |
529 |
pendings [pri][w_->pending - 1].events |= revents; |
530 |
else |
531 |
{ |
532 |
w_->pending = ++pendingcnt [pri]; |
533 |
array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
534 |
pendings [pri][w_->pending - 1].w = w_; |
535 |
pendings [pri][w_->pending - 1].events = revents; |
536 |
} |
537 |
} |
538 |
|
539 |
void inline_speed |
540 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
541 |
{ |
542 |
int i; |
543 |
|
544 |
for (i = 0; i < eventcnt; ++i) |
545 |
ev_feed_event (EV_A_ events [i], type); |
546 |
} |
547 |
|
548 |
/*****************************************************************************/ |
549 |
|
550 |
void inline_size |
551 |
anfds_init (ANFD *base, int count) |
552 |
{ |
553 |
while (count--) |
554 |
{ |
555 |
base->head = 0; |
556 |
base->events = EV_NONE; |
557 |
base->reify = 0; |
558 |
|
559 |
++base; |
560 |
} |
561 |
} |
562 |
|
563 |
void inline_speed |
564 |
fd_event (EV_P_ int fd, int revents) |
565 |
{ |
566 |
ANFD *anfd = anfds + fd; |
567 |
ev_io *w; |
568 |
|
569 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
570 |
{ |
571 |
int ev = w->events & revents; |
572 |
|
573 |
if (ev) |
574 |
ev_feed_event (EV_A_ (W)w, ev); |
575 |
} |
576 |
} |
577 |
|
578 |
void |
579 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
580 |
{ |
581 |
if (fd >= 0 && fd < anfdmax) |
582 |
fd_event (EV_A_ fd, revents); |
583 |
} |
584 |
|
585 |
void inline_size |
586 |
fd_reify (EV_P) |
587 |
{ |
588 |
int i; |
589 |
|
590 |
for (i = 0; i < fdchangecnt; ++i) |
591 |
{ |
592 |
int fd = fdchanges [i]; |
593 |
ANFD *anfd = anfds + fd; |
594 |
ev_io *w; |
595 |
|
596 |
unsigned char events = 0; |
597 |
|
598 |
for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
599 |
events |= (unsigned char)w->events; |
600 |
|
601 |
#if EV_SELECT_IS_WINSOCKET |
602 |
if (events) |
603 |
{ |
604 |
unsigned long argp; |
605 |
#ifdef EV_FD_TO_WIN32_HANDLE |
606 |
anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
607 |
#else |
608 |
anfd->handle = _get_osfhandle (fd); |
609 |
#endif |
610 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
611 |
} |
612 |
#endif |
613 |
|
614 |
{ |
615 |
unsigned char o_events = anfd->events; |
616 |
unsigned char o_reify = anfd->reify; |
617 |
|
618 |
anfd->reify = 0; |
619 |
anfd->events = events; |
620 |
|
621 |
if (o_events != events || o_reify & EV_IOFDSET) |
622 |
backend_modify (EV_A_ fd, o_events, events); |
623 |
} |
624 |
} |
625 |
|
626 |
fdchangecnt = 0; |
627 |
} |
628 |
|
629 |
void inline_size |
630 |
fd_change (EV_P_ int fd, int flags) |
631 |
{ |
632 |
unsigned char reify = anfds [fd].reify; |
633 |
anfds [fd].reify |= flags; |
634 |
|
635 |
if (expect_true (!reify)) |
636 |
{ |
637 |
++fdchangecnt; |
638 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
639 |
fdchanges [fdchangecnt - 1] = fd; |
640 |
} |
641 |
} |
642 |
|
643 |
void inline_speed |
644 |
fd_kill (EV_P_ int fd) |
645 |
{ |
646 |
ev_io *w; |
647 |
|
648 |
while ((w = (ev_io *)anfds [fd].head)) |
649 |
{ |
650 |
ev_io_stop (EV_A_ w); |
651 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
652 |
} |
653 |
} |
654 |
|
655 |
int inline_size |
656 |
fd_valid (int fd) |
657 |
{ |
658 |
#ifdef _WIN32 |
659 |
return _get_osfhandle (fd) != -1; |
660 |
#else |
661 |
return fcntl (fd, F_GETFD) != -1; |
662 |
#endif |
663 |
} |
664 |
|
665 |
/* called on EBADF to verify fds */ |
666 |
static void noinline |
667 |
fd_ebadf (EV_P) |
668 |
{ |
669 |
int fd; |
670 |
|
671 |
for (fd = 0; fd < anfdmax; ++fd) |
672 |
if (anfds [fd].events) |
673 |
if (!fd_valid (fd) == -1 && errno == EBADF) |
674 |
fd_kill (EV_A_ fd); |
675 |
} |
676 |
|
677 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
678 |
static void noinline |
679 |
fd_enomem (EV_P) |
680 |
{ |
681 |
int fd; |
682 |
|
683 |
for (fd = anfdmax; fd--; ) |
684 |
if (anfds [fd].events) |
685 |
{ |
686 |
fd_kill (EV_A_ fd); |
687 |
return; |
688 |
} |
689 |
} |
690 |
|
691 |
/* usually called after fork if backend needs to re-arm all fds from scratch */ |
692 |
static void noinline |
693 |
fd_rearm_all (EV_P) |
694 |
{ |
695 |
int fd; |
696 |
|
697 |
for (fd = 0; fd < anfdmax; ++fd) |
698 |
if (anfds [fd].events) |
699 |
{ |
700 |
anfds [fd].events = 0; |
701 |
fd_change (EV_A_ fd, EV_IOFDSET | 1); |
702 |
} |
703 |
} |
704 |
|
705 |
/*****************************************************************************/ |
706 |
|
707 |
void inline_speed |
708 |
upheap (WT *heap, int k) |
709 |
{ |
710 |
WT w = heap [k]; |
711 |
|
712 |
while (k) |
713 |
{ |
714 |
int p = (k - 1) >> 1; |
715 |
|
716 |
if (heap [p]->at <= w->at) |
717 |
break; |
718 |
|
719 |
heap [k] = heap [p]; |
720 |
((W)heap [k])->active = k + 1; |
721 |
k = p; |
722 |
} |
723 |
|
724 |
heap [k] = w; |
725 |
((W)heap [k])->active = k + 1; |
726 |
} |
727 |
|
728 |
void inline_speed |
729 |
downheap (WT *heap, int N, int k) |
730 |
{ |
731 |
WT w = heap [k]; |
732 |
|
733 |
for (;;) |
734 |
{ |
735 |
int c = (k << 1) + 1; |
736 |
|
737 |
if (c >= N) |
738 |
break; |
739 |
|
740 |
c += c + 1 < N && heap [c]->at > heap [c + 1]->at |
741 |
? 1 : 0; |
742 |
|
743 |
if (w->at <= heap [c]->at) |
744 |
break; |
745 |
|
746 |
heap [k] = heap [c]; |
747 |
((W)heap [k])->active = k + 1; |
748 |
|
749 |
k = c; |
750 |
} |
751 |
|
752 |
heap [k] = w; |
753 |
((W)heap [k])->active = k + 1; |
754 |
} |
755 |
|
756 |
void inline_size |
757 |
adjustheap (WT *heap, int N, int k) |
758 |
{ |
759 |
upheap (heap, k); |
760 |
downheap (heap, N, k); |
761 |
} |
762 |
|
763 |
/*****************************************************************************/ |
764 |
|
765 |
typedef struct |
766 |
{ |
767 |
WL head; |
768 |
EV_ATOMIC_T gotsig; |
769 |
} ANSIG; |
770 |
|
771 |
static ANSIG *signals; |
772 |
static int signalmax; |
773 |
|
774 |
static EV_ATOMIC_T gotsig; |
775 |
|
776 |
void inline_size |
777 |
signals_init (ANSIG *base, int count) |
778 |
{ |
779 |
while (count--) |
780 |
{ |
781 |
base->head = 0; |
782 |
base->gotsig = 0; |
783 |
|
784 |
++base; |
785 |
} |
786 |
} |
787 |
|
788 |
/*****************************************************************************/ |
789 |
|
790 |
void inline_speed |
791 |
fd_intern (int fd) |
792 |
{ |
793 |
#ifdef _WIN32 |
794 |
int arg = 1; |
795 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
796 |
#else |
797 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
798 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
799 |
#endif |
800 |
} |
801 |
|
802 |
static void noinline |
803 |
evpipe_init (EV_P) |
804 |
{ |
805 |
if (!ev_is_active (&pipeev)) |
806 |
{ |
807 |
while (pipe (evpipe)) |
808 |
syserr ("(libev) error creating signal/async pipe"); |
809 |
|
810 |
fd_intern (evpipe [0]); |
811 |
fd_intern (evpipe [1]); |
812 |
|
813 |
ev_io_set (&pipeev, evpipe [0], EV_READ); |
814 |
ev_io_start (EV_A_ &pipeev); |
815 |
ev_unref (EV_A); /* watcher should not keep loop alive */ |
816 |
} |
817 |
} |
818 |
|
819 |
void inline_size |
820 |
evpipe_write (EV_P_ int sig, int async) |
821 |
{ |
822 |
if (!(gotasync || gotsig)) |
823 |
{ |
824 |
int old_errno = errno; /* save errno becaue write might clobber it */ |
825 |
|
826 |
if (sig) gotsig = 1; |
827 |
if (async) gotasync = 1; |
828 |
|
829 |
write (evpipe [1], &old_errno, 1); |
830 |
|
831 |
errno = old_errno; |
832 |
} |
833 |
} |
834 |
|
835 |
static void |
836 |
pipecb (EV_P_ ev_io *iow, int revents) |
837 |
{ |
838 |
{ |
839 |
int dummy; |
840 |
read (evpipe [0], &dummy, 1); |
841 |
} |
842 |
|
843 |
if (gotsig) |
844 |
{ |
845 |
int signum; |
846 |
gotsig = 0; |
847 |
|
848 |
for (signum = signalmax; signum--; ) |
849 |
if (signals [signum].gotsig) |
850 |
ev_feed_signal_event (EV_A_ signum + 1); |
851 |
} |
852 |
|
853 |
#if EV_ASYNC_ENABLE |
854 |
if (gotasync) |
855 |
{ |
856 |
int i; |
857 |
gotasync = 0; |
858 |
|
859 |
for (i = asynccnt; i--; ) |
860 |
if (asyncs [i]->sent) |
861 |
{ |
862 |
asyncs [i]->sent = 0; |
863 |
ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
864 |
} |
865 |
} |
866 |
#endif |
867 |
} |
868 |
|
869 |
/*****************************************************************************/ |
870 |
|
871 |
static void |
872 |
sighandler (int signum) |
873 |
{ |
874 |
#if EV_MULTIPLICITY |
875 |
struct ev_loop *loop = &default_loop_struct; |
876 |
#endif |
877 |
|
878 |
#if _WIN32 |
879 |
signal (signum, sighandler); |
880 |
#endif |
881 |
|
882 |
signals [signum - 1].gotsig = 1; |
883 |
evpipe_write (EV_A_ 1, 0); |
884 |
} |
885 |
|
886 |
void noinline |
887 |
ev_feed_signal_event (EV_P_ int signum) |
888 |
{ |
889 |
WL w; |
890 |
|
891 |
#if EV_MULTIPLICITY |
892 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
893 |
#endif |
894 |
|
895 |
--signum; |
896 |
|
897 |
if (signum < 0 || signum >= signalmax) |
898 |
return; |
899 |
|
900 |
signals [signum].gotsig = 0; |
901 |
|
902 |
for (w = signals [signum].head; w; w = w->next) |
903 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
904 |
} |
905 |
|
906 |
/*****************************************************************************/ |
907 |
|
908 |
static WL childs [EV_PID_HASHSIZE]; |
909 |
|
910 |
#ifndef _WIN32 |
911 |
|
912 |
static ev_signal childev; |
913 |
|
914 |
#ifndef WIFCONTINUED |
915 |
# define WIFCONTINUED(status) 0 |
916 |
#endif |
917 |
|
918 |
void inline_speed |
919 |
child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) |
920 |
{ |
921 |
ev_child *w; |
922 |
int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
923 |
|
924 |
for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) |
925 |
{ |
926 |
if ((w->pid == pid || !w->pid) |
927 |
&& (!traced || (w->flags & 1))) |
928 |
{ |
929 |
ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ |
930 |
w->rpid = pid; |
931 |
w->rstatus = status; |
932 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
933 |
} |
934 |
} |
935 |
} |
936 |
|
937 |
#ifndef WCONTINUED |
938 |
# define WCONTINUED 0 |
939 |
#endif |
940 |
|
941 |
static void |
942 |
childcb (EV_P_ ev_signal *sw, int revents) |
943 |
{ |
944 |
int pid, status; |
945 |
|
946 |
/* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
947 |
if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
948 |
if (!WCONTINUED |
949 |
|| errno != EINVAL |
950 |
|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
951 |
return; |
952 |
|
953 |
/* make sure we are called again until all childs have been reaped */ |
954 |
/* we need to do it this way so that the callback gets called before we continue */ |
955 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
956 |
|
957 |
child_reap (EV_A_ sw, pid, pid, status); |
958 |
if (EV_PID_HASHSIZE > 1) |
959 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
960 |
} |
961 |
|
962 |
#endif |
963 |
|
964 |
/*****************************************************************************/ |
965 |
|
966 |
#if EV_USE_PORT |
967 |
# include "ev_port.c" |
968 |
#endif |
969 |
#if EV_USE_KQUEUE |
970 |
# include "ev_kqueue.c" |
971 |
#endif |
972 |
#if EV_USE_EPOLL |
973 |
# include "ev_epoll.c" |
974 |
#endif |
975 |
#if EV_USE_POLL |
976 |
# include "ev_poll.c" |
977 |
#endif |
978 |
#if EV_USE_SELECT |
979 |
# include "ev_select.c" |
980 |
#endif |
981 |
|
982 |
int |
983 |
ev_version_major (void) |
984 |
{ |
985 |
return EV_VERSION_MAJOR; |
986 |
} |
987 |
|
988 |
int |
989 |
ev_version_minor (void) |
990 |
{ |
991 |
return EV_VERSION_MINOR; |
992 |
} |
993 |
|
994 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
995 |
int inline_size |
996 |
enable_secure (void) |
997 |
{ |
998 |
#ifdef _WIN32 |
999 |
return 0; |
1000 |
#else |
1001 |
return getuid () != geteuid () |
1002 |
|| getgid () != getegid (); |
1003 |
#endif |
1004 |
} |
1005 |
|
1006 |
unsigned int |
1007 |
ev_supported_backends (void) |
1008 |
{ |
1009 |
unsigned int flags = 0; |
1010 |
|
1011 |
if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
1012 |
if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
1013 |
if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
1014 |
if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
1015 |
if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
1016 |
|
1017 |
return flags; |
1018 |
} |
1019 |
|
1020 |
unsigned int |
1021 |
ev_recommended_backends (void) |
1022 |
{ |
1023 |
unsigned int flags = ev_supported_backends (); |
1024 |
|
1025 |
#ifndef __NetBSD__ |
1026 |
/* kqueue is borked on everything but netbsd apparently */ |
1027 |
/* it usually doesn't work correctly on anything but sockets and pipes */ |
1028 |
flags &= ~EVBACKEND_KQUEUE; |
1029 |
#endif |
1030 |
#ifdef __APPLE__ |
1031 |
// flags &= ~EVBACKEND_KQUEUE; for documentation |
1032 |
flags &= ~EVBACKEND_POLL; |
1033 |
#endif |
1034 |
|
1035 |
return flags; |
1036 |
} |
1037 |
|
1038 |
unsigned int |
1039 |
ev_embeddable_backends (void) |
1040 |
{ |
1041 |
int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
1042 |
|
1043 |
/* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
1044 |
/* please fix it and tell me how to detect the fix */ |
1045 |
flags &= ~EVBACKEND_EPOLL; |
1046 |
|
1047 |
return flags; |
1048 |
} |
1049 |
|
1050 |
unsigned int |
1051 |
ev_backend (EV_P) |
1052 |
{ |
1053 |
return backend; |
1054 |
} |
1055 |
|
1056 |
unsigned int |
1057 |
ev_loop_count (EV_P) |
1058 |
{ |
1059 |
return loop_count; |
1060 |
} |
1061 |
|
1062 |
void |
1063 |
ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
1064 |
{ |
1065 |
io_blocktime = interval; |
1066 |
} |
1067 |
|
1068 |
void |
1069 |
ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
1070 |
{ |
1071 |
timeout_blocktime = interval; |
1072 |
} |
1073 |
|
1074 |
static void noinline |
1075 |
loop_init (EV_P_ unsigned int flags) |
1076 |
{ |
1077 |
if (!backend) |
1078 |
{ |
1079 |
#if EV_USE_MONOTONIC |
1080 |
{ |
1081 |
struct timespec ts; |
1082 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
1083 |
have_monotonic = 1; |
1084 |
} |
1085 |
#endif |
1086 |
|
1087 |
ev_rt_now = ev_time (); |
1088 |
mn_now = get_clock (); |
1089 |
now_floor = mn_now; |
1090 |
rtmn_diff = ev_rt_now - mn_now; |
1091 |
|
1092 |
io_blocktime = 0.; |
1093 |
timeout_blocktime = 0.; |
1094 |
backend = 0; |
1095 |
backend_fd = -1; |
1096 |
gotasync = 0; |
1097 |
#if EV_USE_INOTIFY |
1098 |
fs_fd = -2; |
1099 |
#endif |
1100 |
|
1101 |
/* pid check not overridable via env */ |
1102 |
#ifndef _WIN32 |
1103 |
if (flags & EVFLAG_FORKCHECK) |
1104 |
curpid = getpid (); |
1105 |
#endif |
1106 |
|
1107 |
if (!(flags & EVFLAG_NOENV) |
1108 |
&& !enable_secure () |
1109 |
&& getenv ("LIBEV_FLAGS")) |
1110 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
1111 |
|
1112 |
if (!(flags & 0x0000ffffUL)) |
1113 |
flags |= ev_recommended_backends (); |
1114 |
|
1115 |
#if EV_USE_PORT |
1116 |
if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
1117 |
#endif |
1118 |
#if EV_USE_KQUEUE |
1119 |
if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
1120 |
#endif |
1121 |
#if EV_USE_EPOLL |
1122 |
if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
1123 |
#endif |
1124 |
#if EV_USE_POLL |
1125 |
if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
1126 |
#endif |
1127 |
#if EV_USE_SELECT |
1128 |
if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
1129 |
#endif |
1130 |
|
1131 |
ev_init (&pipeev, pipecb); |
1132 |
ev_set_priority (&pipeev, EV_MAXPRI); |
1133 |
} |
1134 |
} |
1135 |
|
1136 |
static void noinline |
1137 |
loop_destroy (EV_P) |
1138 |
{ |
1139 |
int i; |
1140 |
|
1141 |
if (ev_is_active (&pipeev)) |
1142 |
{ |
1143 |
ev_ref (EV_A); /* signal watcher */ |
1144 |
ev_io_stop (EV_A_ &pipeev); |
1145 |
|
1146 |
close (evpipe [0]); evpipe [0] = 0; |
1147 |
close (evpipe [1]); evpipe [1] = 0; |
1148 |
} |
1149 |
|
1150 |
#if EV_USE_INOTIFY |
1151 |
if (fs_fd >= 0) |
1152 |
close (fs_fd); |
1153 |
#endif |
1154 |
|
1155 |
if (backend_fd >= 0) |
1156 |
close (backend_fd); |
1157 |
|
1158 |
#if EV_USE_PORT |
1159 |
if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
1160 |
#endif |
1161 |
#if EV_USE_KQUEUE |
1162 |
if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
1163 |
#endif |
1164 |
#if EV_USE_EPOLL |
1165 |
if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
1166 |
#endif |
1167 |
#if EV_USE_POLL |
1168 |
if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
1169 |
#endif |
1170 |
#if EV_USE_SELECT |
1171 |
if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
1172 |
#endif |
1173 |
|
1174 |
for (i = NUMPRI; i--; ) |
1175 |
{ |
1176 |
array_free (pending, [i]); |
1177 |
#if EV_IDLE_ENABLE |
1178 |
array_free (idle, [i]); |
1179 |
#endif |
1180 |
} |
1181 |
|
1182 |
ev_free (anfds); anfdmax = 0; |
1183 |
|
1184 |
/* have to use the microsoft-never-gets-it-right macro */ |
1185 |
array_free (fdchange, EMPTY); |
1186 |
array_free (timer, EMPTY); |
1187 |
#if EV_PERIODIC_ENABLE |
1188 |
array_free (periodic, EMPTY); |
1189 |
#endif |
1190 |
#if EV_FORK_ENABLE |
1191 |
array_free (fork, EMPTY); |
1192 |
#endif |
1193 |
array_free (prepare, EMPTY); |
1194 |
array_free (check, EMPTY); |
1195 |
#if EV_ASYNC_ENABLE |
1196 |
array_free (async, EMPTY); |
1197 |
#endif |
1198 |
|
1199 |
backend = 0; |
1200 |
} |
1201 |
|
1202 |
void inline_size infy_fork (EV_P); |
1203 |
|
1204 |
void inline_size |
1205 |
loop_fork (EV_P) |
1206 |
{ |
1207 |
#if EV_USE_PORT |
1208 |
if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
1209 |
#endif |
1210 |
#if EV_USE_KQUEUE |
1211 |
if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
1212 |
#endif |
1213 |
#if EV_USE_EPOLL |
1214 |
if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
1215 |
#endif |
1216 |
#if EV_USE_INOTIFY |
1217 |
infy_fork (EV_A); |
1218 |
#endif |
1219 |
|
1220 |
if (ev_is_active (&pipeev)) |
1221 |
{ |
1222 |
/* this "locks" the handlers against writing to the pipe */ |
1223 |
gotsig = gotasync = 1; |
1224 |
|
1225 |
ev_ref (EV_A); |
1226 |
ev_io_stop (EV_A_ &pipeev); |
1227 |
close (evpipe [0]); |
1228 |
close (evpipe [1]); |
1229 |
|
1230 |
evpipe_init (EV_A); |
1231 |
/* now iterate over everything, in case we missed something */ |
1232 |
pipecb (EV_A_ &pipeev, EV_READ); |
1233 |
} |
1234 |
|
1235 |
postfork = 0; |
1236 |
} |
1237 |
|
1238 |
#if EV_MULTIPLICITY |
1239 |
struct ev_loop * |
1240 |
ev_loop_new (unsigned int flags) |
1241 |
{ |
1242 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
1243 |
|
1244 |
memset (loop, 0, sizeof (struct ev_loop)); |
1245 |
|
1246 |
loop_init (EV_A_ flags); |
1247 |
|
1248 |
if (ev_backend (EV_A)) |
1249 |
return loop; |
1250 |
|
1251 |
return 0; |
1252 |
} |
1253 |
|
1254 |
void |
1255 |
ev_loop_destroy (EV_P) |
1256 |
{ |
1257 |
loop_destroy (EV_A); |
1258 |
ev_free (loop); |
1259 |
} |
1260 |
|
1261 |
void |
1262 |
ev_loop_fork (EV_P) |
1263 |
{ |
1264 |
postfork = 1; /* must be in line with ev_default_fork */ |
1265 |
} |
1266 |
|
1267 |
#endif |
1268 |
|
1269 |
#if EV_MULTIPLICITY |
1270 |
struct ev_loop * |
1271 |
ev_default_loop_init (unsigned int flags) |
1272 |
#else |
1273 |
int |
1274 |
ev_default_loop (unsigned int flags) |
1275 |
#endif |
1276 |
{ |
1277 |
if (!ev_default_loop_ptr) |
1278 |
{ |
1279 |
#if EV_MULTIPLICITY |
1280 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
1281 |
#else |
1282 |
ev_default_loop_ptr = 1; |
1283 |
#endif |
1284 |
|
1285 |
loop_init (EV_A_ flags); |
1286 |
|
1287 |
if (ev_backend (EV_A)) |
1288 |
{ |
1289 |
#ifndef _WIN32 |
1290 |
ev_signal_init (&childev, childcb, SIGCHLD); |
1291 |
ev_set_priority (&childev, EV_MAXPRI); |
1292 |
ev_signal_start (EV_A_ &childev); |
1293 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
1294 |
#endif |
1295 |
} |
1296 |
else |
1297 |
ev_default_loop_ptr = 0; |
1298 |
} |
1299 |
|
1300 |
return ev_default_loop_ptr; |
1301 |
} |
1302 |
|
1303 |
void |
1304 |
ev_default_destroy (void) |
1305 |
{ |
1306 |
#if EV_MULTIPLICITY |
1307 |
struct ev_loop *loop = ev_default_loop_ptr; |
1308 |
#endif |
1309 |
|
1310 |
#ifndef _WIN32 |
1311 |
ev_ref (EV_A); /* child watcher */ |
1312 |
ev_signal_stop (EV_A_ &childev); |
1313 |
#endif |
1314 |
|
1315 |
loop_destroy (EV_A); |
1316 |
} |
1317 |
|
1318 |
void |
1319 |
ev_default_fork (void) |
1320 |
{ |
1321 |
#if EV_MULTIPLICITY |
1322 |
struct ev_loop *loop = ev_default_loop_ptr; |
1323 |
#endif |
1324 |
|
1325 |
if (backend) |
1326 |
postfork = 1; /* must be in line with ev_loop_fork */ |
1327 |
} |
1328 |
|
1329 |
/*****************************************************************************/ |
1330 |
|
1331 |
void |
1332 |
ev_invoke (EV_P_ void *w, int revents) |
1333 |
{ |
1334 |
EV_CB_INVOKE ((W)w, revents); |
1335 |
} |
1336 |
|
1337 |
void inline_speed |
1338 |
call_pending (EV_P) |
1339 |
{ |
1340 |
int pri; |
1341 |
|
1342 |
for (pri = NUMPRI; pri--; ) |
1343 |
while (pendingcnt [pri]) |
1344 |
{ |
1345 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1346 |
|
1347 |
if (expect_true (p->w)) |
1348 |
{ |
1349 |
/*assert (("non-pending watcher on pending list", p->w->pending));*/ |
1350 |
|
1351 |
p->w->pending = 0; |
1352 |
EV_CB_INVOKE (p->w, p->events); |
1353 |
} |
1354 |
} |
1355 |
} |
1356 |
|
1357 |
void inline_size |
1358 |
timers_reify (EV_P) |
1359 |
{ |
1360 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
1361 |
{ |
1362 |
ev_timer *w = (ev_timer *)timers [0]; |
1363 |
|
1364 |
/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ |
1365 |
|
1366 |
/* first reschedule or stop timer */ |
1367 |
if (w->repeat) |
1368 |
{ |
1369 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1370 |
|
1371 |
((WT)w)->at += w->repeat; |
1372 |
if (((WT)w)->at < mn_now) |
1373 |
((WT)w)->at = mn_now; |
1374 |
|
1375 |
downheap (timers, timercnt, 0); |
1376 |
} |
1377 |
else |
1378 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1379 |
|
1380 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
1381 |
} |
1382 |
} |
1383 |
|
1384 |
#if EV_PERIODIC_ENABLE |
1385 |
void inline_size |
1386 |
periodics_reify (EV_P) |
1387 |
{ |
1388 |
while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
1389 |
{ |
1390 |
ev_periodic *w = (ev_periodic *)periodics [0]; |
1391 |
|
1392 |
/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ |
1393 |
|
1394 |
/* first reschedule or stop timer */ |
1395 |
if (w->reschedule_cb) |
1396 |
{ |
1397 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); |
1398 |
assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
1399 |
downheap (periodics, periodiccnt, 0); |
1400 |
} |
1401 |
else if (w->interval) |
1402 |
{ |
1403 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1404 |
if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval; |
1405 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
1406 |
downheap (periodics, periodiccnt, 0); |
1407 |
} |
1408 |
else |
1409 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1410 |
|
1411 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
1412 |
} |
1413 |
} |
1414 |
|
1415 |
static void noinline |
1416 |
periodics_reschedule (EV_P) |
1417 |
{ |
1418 |
int i; |
1419 |
|
1420 |
/* adjust periodics after time jump */ |
1421 |
for (i = 0; i < periodiccnt; ++i) |
1422 |
{ |
1423 |
ev_periodic *w = (ev_periodic *)periodics [i]; |
1424 |
|
1425 |
if (w->reschedule_cb) |
1426 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1427 |
else if (w->interval) |
1428 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1429 |
} |
1430 |
|
1431 |
/* now rebuild the heap */ |
1432 |
for (i = periodiccnt >> 1; i--; ) |
1433 |
downheap (periodics, periodiccnt, i); |
1434 |
} |
1435 |
#endif |
1436 |
|
1437 |
#if EV_IDLE_ENABLE |
1438 |
void inline_size |
1439 |
idle_reify (EV_P) |
1440 |
{ |
1441 |
if (expect_false (idleall)) |
1442 |
{ |
1443 |
int pri; |
1444 |
|
1445 |
for (pri = NUMPRI; pri--; ) |
1446 |
{ |
1447 |
if (pendingcnt [pri]) |
1448 |
break; |
1449 |
|
1450 |
if (idlecnt [pri]) |
1451 |
{ |
1452 |
queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
1453 |
break; |
1454 |
} |
1455 |
} |
1456 |
} |
1457 |
} |
1458 |
#endif |
1459 |
|
1460 |
void inline_speed |
1461 |
time_update (EV_P_ ev_tstamp max_block) |
1462 |
{ |
1463 |
int i; |
1464 |
|
1465 |
#if EV_USE_MONOTONIC |
1466 |
if (expect_true (have_monotonic)) |
1467 |
{ |
1468 |
ev_tstamp odiff = rtmn_diff; |
1469 |
|
1470 |
mn_now = get_clock (); |
1471 |
|
1472 |
/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
1473 |
/* interpolate in the meantime */ |
1474 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
1475 |
{ |
1476 |
ev_rt_now = rtmn_diff + mn_now; |
1477 |
return; |
1478 |
} |
1479 |
|
1480 |
now_floor = mn_now; |
1481 |
ev_rt_now = ev_time (); |
1482 |
|
1483 |
/* loop a few times, before making important decisions. |
1484 |
* on the choice of "4": one iteration isn't enough, |
1485 |
* in case we get preempted during the calls to |
1486 |
* ev_time and get_clock. a second call is almost guaranteed |
1487 |
* to succeed in that case, though. and looping a few more times |
1488 |
* doesn't hurt either as we only do this on time-jumps or |
1489 |
* in the unlikely event of having been preempted here. |
1490 |
*/ |
1491 |
for (i = 4; --i; ) |
1492 |
{ |
1493 |
rtmn_diff = ev_rt_now - mn_now; |
1494 |
|
1495 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
1496 |
return; /* all is well */ |
1497 |
|
1498 |
ev_rt_now = ev_time (); |
1499 |
mn_now = get_clock (); |
1500 |
now_floor = mn_now; |
1501 |
} |
1502 |
|
1503 |
# if EV_PERIODIC_ENABLE |
1504 |
periodics_reschedule (EV_A); |
1505 |
# endif |
1506 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
1507 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
1508 |
} |
1509 |
else |
1510 |
#endif |
1511 |
{ |
1512 |
ev_rt_now = ev_time (); |
1513 |
|
1514 |
if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
1515 |
{ |
1516 |
#if EV_PERIODIC_ENABLE |
1517 |
periodics_reschedule (EV_A); |
1518 |
#endif |
1519 |
/* adjust timers. this is easy, as the offset is the same for all of them */ |
1520 |
for (i = 0; i < timercnt; ++i) |
1521 |
((WT)timers [i])->at += ev_rt_now - mn_now; |
1522 |
} |
1523 |
|
1524 |
mn_now = ev_rt_now; |
1525 |
} |
1526 |
} |
1527 |
|
1528 |
void |
1529 |
ev_ref (EV_P) |
1530 |
{ |
1531 |
++activecnt; |
1532 |
} |
1533 |
|
1534 |
void |
1535 |
ev_unref (EV_P) |
1536 |
{ |
1537 |
--activecnt; |
1538 |
} |
1539 |
|
1540 |
static int loop_done; |
1541 |
|
1542 |
void |
1543 |
ev_loop (EV_P_ int flags) |
1544 |
{ |
1545 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) |
1546 |
? EVUNLOOP_ONE |
1547 |
: EVUNLOOP_CANCEL; |
1548 |
|
1549 |
call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ |
1550 |
|
1551 |
do |
1552 |
{ |
1553 |
#ifndef _WIN32 |
1554 |
if (expect_false (curpid)) /* penalise the forking check even more */ |
1555 |
if (expect_false (getpid () != curpid)) |
1556 |
{ |
1557 |
curpid = getpid (); |
1558 |
postfork = 1; |
1559 |
} |
1560 |
#endif |
1561 |
|
1562 |
#if EV_FORK_ENABLE |
1563 |
/* we might have forked, so queue fork handlers */ |
1564 |
if (expect_false (postfork)) |
1565 |
if (forkcnt) |
1566 |
{ |
1567 |
queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
1568 |
call_pending (EV_A); |
1569 |
} |
1570 |
#endif |
1571 |
|
1572 |
/* queue prepare watchers (and execute them) */ |
1573 |
if (expect_false (preparecnt)) |
1574 |
{ |
1575 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
1576 |
call_pending (EV_A); |
1577 |
} |
1578 |
|
1579 |
if (expect_false (!activecnt)) |
1580 |
break; |
1581 |
|
1582 |
/* we might have forked, so reify kernel state if necessary */ |
1583 |
if (expect_false (postfork)) |
1584 |
loop_fork (EV_A); |
1585 |
|
1586 |
/* update fd-related kernel structures */ |
1587 |
fd_reify (EV_A); |
1588 |
|
1589 |
/* calculate blocking time */ |
1590 |
{ |
1591 |
ev_tstamp waittime = 0.; |
1592 |
ev_tstamp sleeptime = 0.; |
1593 |
|
1594 |
if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) |
1595 |
{ |
1596 |
/* update time to cancel out callback processing overhead */ |
1597 |
time_update (EV_A_ 1e100); |
1598 |
|
1599 |
waittime = MAX_BLOCKTIME; |
1600 |
|
1601 |
if (timercnt) |
1602 |
{ |
1603 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; |
1604 |
if (waittime > to) waittime = to; |
1605 |
} |
1606 |
|
1607 |
#if EV_PERIODIC_ENABLE |
1608 |
if (periodiccnt) |
1609 |
{ |
1610 |
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; |
1611 |
if (waittime > to) waittime = to; |
1612 |
} |
1613 |
#endif |
1614 |
|
1615 |
if (expect_false (waittime < timeout_blocktime)) |
1616 |
waittime = timeout_blocktime; |
1617 |
|
1618 |
sleeptime = waittime - backend_fudge; |
1619 |
|
1620 |
if (expect_true (sleeptime > io_blocktime)) |
1621 |
sleeptime = io_blocktime; |
1622 |
|
1623 |
if (sleeptime) |
1624 |
{ |
1625 |
ev_sleep (sleeptime); |
1626 |
waittime -= sleeptime; |
1627 |
} |
1628 |
} |
1629 |
|
1630 |
++loop_count; |
1631 |
backend_poll (EV_A_ waittime); |
1632 |
|
1633 |
/* update ev_rt_now, do magic */ |
1634 |
time_update (EV_A_ waittime + sleeptime); |
1635 |
} |
1636 |
|
1637 |
/* queue pending timers and reschedule them */ |
1638 |
timers_reify (EV_A); /* relative timers called last */ |
1639 |
#if EV_PERIODIC_ENABLE |
1640 |
periodics_reify (EV_A); /* absolute timers called first */ |
1641 |
#endif |
1642 |
|
1643 |
#if EV_IDLE_ENABLE |
1644 |
/* queue idle watchers unless other events are pending */ |
1645 |
idle_reify (EV_A); |
1646 |
#endif |
1647 |
|
1648 |
/* queue check watchers, to be executed first */ |
1649 |
if (expect_false (checkcnt)) |
1650 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
1651 |
|
1652 |
call_pending (EV_A); |
1653 |
|
1654 |
} |
1655 |
while (expect_true (activecnt && !loop_done)); |
1656 |
|
1657 |
if (loop_done == EVUNLOOP_ONE) |
1658 |
loop_done = EVUNLOOP_CANCEL; |
1659 |
} |
1660 |
|
1661 |
void |
1662 |
ev_unloop (EV_P_ int how) |
1663 |
{ |
1664 |
loop_done = how; |
1665 |
} |
1666 |
|
1667 |
/*****************************************************************************/ |
1668 |
|
1669 |
void inline_size |
1670 |
wlist_add (WL *head, WL elem) |
1671 |
{ |
1672 |
elem->next = *head; |
1673 |
*head = elem; |
1674 |
} |
1675 |
|
1676 |
void inline_size |
1677 |
wlist_del (WL *head, WL elem) |
1678 |
{ |
1679 |
while (*head) |
1680 |
{ |
1681 |
if (*head == elem) |
1682 |
{ |
1683 |
*head = elem->next; |
1684 |
return; |
1685 |
} |
1686 |
|
1687 |
head = &(*head)->next; |
1688 |
} |
1689 |
} |
1690 |
|
1691 |
void inline_speed |
1692 |
clear_pending (EV_P_ W w) |
1693 |
{ |
1694 |
if (w->pending) |
1695 |
{ |
1696 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
1697 |
w->pending = 0; |
1698 |
} |
1699 |
} |
1700 |
|
1701 |
int |
1702 |
ev_clear_pending (EV_P_ void *w) |
1703 |
{ |
1704 |
W w_ = (W)w; |
1705 |
int pending = w_->pending; |
1706 |
|
1707 |
if (expect_true (pending)) |
1708 |
{ |
1709 |
ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
1710 |
w_->pending = 0; |
1711 |
p->w = 0; |
1712 |
return p->events; |
1713 |
} |
1714 |
else |
1715 |
return 0; |
1716 |
} |
1717 |
|
1718 |
void inline_size |
1719 |
pri_adjust (EV_P_ W w) |
1720 |
{ |
1721 |
int pri = w->priority; |
1722 |
pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
1723 |
pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
1724 |
w->priority = pri; |
1725 |
} |
1726 |
|
1727 |
void inline_speed |
1728 |
ev_start (EV_P_ W w, int active) |
1729 |
{ |
1730 |
pri_adjust (EV_A_ w); |
1731 |
w->active = active; |
1732 |
ev_ref (EV_A); |
1733 |
} |
1734 |
|
1735 |
void inline_size |
1736 |
ev_stop (EV_P_ W w) |
1737 |
{ |
1738 |
ev_unref (EV_A); |
1739 |
w->active = 0; |
1740 |
} |
1741 |
|
1742 |
/*****************************************************************************/ |
1743 |
|
1744 |
void noinline |
1745 |
ev_io_start (EV_P_ ev_io *w) |
1746 |
{ |
1747 |
int fd = w->fd; |
1748 |
|
1749 |
if (expect_false (ev_is_active (w))) |
1750 |
return; |
1751 |
|
1752 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
1753 |
|
1754 |
ev_start (EV_A_ (W)w, 1); |
1755 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
1756 |
wlist_add (&anfds[fd].head, (WL)w); |
1757 |
|
1758 |
fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); |
1759 |
w->events &= ~EV_IOFDSET; |
1760 |
} |
1761 |
|
1762 |
void noinline |
1763 |
ev_io_stop (EV_P_ ev_io *w) |
1764 |
{ |
1765 |
clear_pending (EV_A_ (W)w); |
1766 |
if (expect_false (!ev_is_active (w))) |
1767 |
return; |
1768 |
|
1769 |
assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
1770 |
|
1771 |
wlist_del (&anfds[w->fd].head, (WL)w); |
1772 |
ev_stop (EV_A_ (W)w); |
1773 |
|
1774 |
fd_change (EV_A_ w->fd, 1); |
1775 |
} |
1776 |
|
1777 |
void noinline |
1778 |
ev_timer_start (EV_P_ ev_timer *w) |
1779 |
{ |
1780 |
if (expect_false (ev_is_active (w))) |
1781 |
return; |
1782 |
|
1783 |
((WT)w)->at += mn_now; |
1784 |
|
1785 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
1786 |
|
1787 |
ev_start (EV_A_ (W)w, ++timercnt); |
1788 |
array_needsize (WT, timers, timermax, timercnt, EMPTY2); |
1789 |
timers [timercnt - 1] = (WT)w; |
1790 |
upheap (timers, timercnt - 1); |
1791 |
|
1792 |
/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ |
1793 |
} |
1794 |
|
1795 |
void noinline |
1796 |
ev_timer_stop (EV_P_ ev_timer *w) |
1797 |
{ |
1798 |
clear_pending (EV_A_ (W)w); |
1799 |
if (expect_false (!ev_is_active (w))) |
1800 |
return; |
1801 |
|
1802 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); |
1803 |
|
1804 |
{ |
1805 |
int active = ((W)w)->active; |
1806 |
|
1807 |
if (expect_true (--active < --timercnt)) |
1808 |
{ |
1809 |
timers [active] = timers [timercnt]; |
1810 |
adjustheap (timers, timercnt, active); |
1811 |
} |
1812 |
} |
1813 |
|
1814 |
((WT)w)->at -= mn_now; |
1815 |
|
1816 |
ev_stop (EV_A_ (W)w); |
1817 |
} |
1818 |
|
1819 |
void noinline |
1820 |
ev_timer_again (EV_P_ ev_timer *w) |
1821 |
{ |
1822 |
if (ev_is_active (w)) |
1823 |
{ |
1824 |
if (w->repeat) |
1825 |
{ |
1826 |
((WT)w)->at = mn_now + w->repeat; |
1827 |
adjustheap (timers, timercnt, ((W)w)->active - 1); |
1828 |
} |
1829 |
else |
1830 |
ev_timer_stop (EV_A_ w); |
1831 |
} |
1832 |
else if (w->repeat) |
1833 |
{ |
1834 |
w->at = w->repeat; |
1835 |
ev_timer_start (EV_A_ w); |
1836 |
} |
1837 |
} |
1838 |
|
1839 |
#if EV_PERIODIC_ENABLE |
1840 |
void noinline |
1841 |
ev_periodic_start (EV_P_ ev_periodic *w) |
1842 |
{ |
1843 |
if (expect_false (ev_is_active (w))) |
1844 |
return; |
1845 |
|
1846 |
if (w->reschedule_cb) |
1847 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1848 |
else if (w->interval) |
1849 |
{ |
1850 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
1851 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
1852 |
((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
1853 |
} |
1854 |
else |
1855 |
((WT)w)->at = w->offset; |
1856 |
|
1857 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
1858 |
array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); |
1859 |
periodics [periodiccnt - 1] = (WT)w; |
1860 |
upheap (periodics, periodiccnt - 1); |
1861 |
|
1862 |
/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ |
1863 |
} |
1864 |
|
1865 |
void noinline |
1866 |
ev_periodic_stop (EV_P_ ev_periodic *w) |
1867 |
{ |
1868 |
clear_pending (EV_A_ (W)w); |
1869 |
if (expect_false (!ev_is_active (w))) |
1870 |
return; |
1871 |
|
1872 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); |
1873 |
|
1874 |
{ |
1875 |
int active = ((W)w)->active; |
1876 |
|
1877 |
if (expect_true (--active < --periodiccnt)) |
1878 |
{ |
1879 |
periodics [active] = periodics [periodiccnt]; |
1880 |
adjustheap (periodics, periodiccnt, active); |
1881 |
} |
1882 |
} |
1883 |
|
1884 |
ev_stop (EV_A_ (W)w); |
1885 |
} |
1886 |
|
1887 |
void noinline |
1888 |
ev_periodic_again (EV_P_ ev_periodic *w) |
1889 |
{ |
1890 |
/* TODO: use adjustheap and recalculation */ |
1891 |
ev_periodic_stop (EV_A_ w); |
1892 |
ev_periodic_start (EV_A_ w); |
1893 |
} |
1894 |
#endif |
1895 |
|
1896 |
#ifndef SA_RESTART |
1897 |
# define SA_RESTART 0 |
1898 |
#endif |
1899 |
|
1900 |
void noinline |
1901 |
ev_signal_start (EV_P_ ev_signal *w) |
1902 |
{ |
1903 |
#if EV_MULTIPLICITY |
1904 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1905 |
#endif |
1906 |
if (expect_false (ev_is_active (w))) |
1907 |
return; |
1908 |
|
1909 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
1910 |
|
1911 |
evpipe_init (EV_A); |
1912 |
|
1913 |
{ |
1914 |
#ifndef _WIN32 |
1915 |
sigset_t full, prev; |
1916 |
sigfillset (&full); |
1917 |
sigprocmask (SIG_SETMASK, &full, &prev); |
1918 |
#endif |
1919 |
|
1920 |
array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
1921 |
|
1922 |
#ifndef _WIN32 |
1923 |
sigprocmask (SIG_SETMASK, &prev, 0); |
1924 |
#endif |
1925 |
} |
1926 |
|
1927 |
ev_start (EV_A_ (W)w, 1); |
1928 |
wlist_add (&signals [w->signum - 1].head, (WL)w); |
1929 |
|
1930 |
if (!((WL)w)->next) |
1931 |
{ |
1932 |
#if _WIN32 |
1933 |
signal (w->signum, sighandler); |
1934 |
#else |
1935 |
struct sigaction sa; |
1936 |
sa.sa_handler = sighandler; |
1937 |
sigfillset (&sa.sa_mask); |
1938 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
1939 |
sigaction (w->signum, &sa, 0); |
1940 |
#endif |
1941 |
} |
1942 |
} |
1943 |
|
1944 |
void noinline |
1945 |
ev_signal_stop (EV_P_ ev_signal *w) |
1946 |
{ |
1947 |
clear_pending (EV_A_ (W)w); |
1948 |
if (expect_false (!ev_is_active (w))) |
1949 |
return; |
1950 |
|
1951 |
wlist_del (&signals [w->signum - 1].head, (WL)w); |
1952 |
ev_stop (EV_A_ (W)w); |
1953 |
|
1954 |
if (!signals [w->signum - 1].head) |
1955 |
signal (w->signum, SIG_DFL); |
1956 |
} |
1957 |
|
1958 |
void |
1959 |
ev_child_start (EV_P_ ev_child *w) |
1960 |
{ |
1961 |
#if EV_MULTIPLICITY |
1962 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1963 |
#endif |
1964 |
if (expect_false (ev_is_active (w))) |
1965 |
return; |
1966 |
|
1967 |
ev_start (EV_A_ (W)w, 1); |
1968 |
wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1969 |
} |
1970 |
|
1971 |
void |
1972 |
ev_child_stop (EV_P_ ev_child *w) |
1973 |
{ |
1974 |
clear_pending (EV_A_ (W)w); |
1975 |
if (expect_false (!ev_is_active (w))) |
1976 |
return; |
1977 |
|
1978 |
wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); |
1979 |
ev_stop (EV_A_ (W)w); |
1980 |
} |
1981 |
|
1982 |
#if EV_STAT_ENABLE |
1983 |
|
1984 |
# ifdef _WIN32 |
1985 |
# undef lstat |
1986 |
# define lstat(a,b) _stati64 (a,b) |
1987 |
# endif |
1988 |
|
1989 |
#define DEF_STAT_INTERVAL 5.0074891 |
1990 |
#define MIN_STAT_INTERVAL 0.1074891 |
1991 |
|
1992 |
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
1993 |
|
1994 |
#if EV_USE_INOTIFY |
1995 |
# define EV_INOTIFY_BUFSIZE 8192 |
1996 |
|
1997 |
static void noinline |
1998 |
infy_add (EV_P_ ev_stat *w) |
1999 |
{ |
2000 |
w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); |
2001 |
|
2002 |
if (w->wd < 0) |
2003 |
{ |
2004 |
ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
2005 |
|
2006 |
/* monitor some parent directory for speedup hints */ |
2007 |
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2008 |
{ |
2009 |
char path [4096]; |
2010 |
strcpy (path, w->path); |
2011 |
|
2012 |
do |
2013 |
{ |
2014 |
int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
2015 |
| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
2016 |
|
2017 |
char *pend = strrchr (path, '/'); |
2018 |
|
2019 |
if (!pend) |
2020 |
break; /* whoops, no '/', complain to your admin */ |
2021 |
|
2022 |
*pend = 0; |
2023 |
w->wd = inotify_add_watch (fs_fd, path, mask); |
2024 |
} |
2025 |
while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2026 |
} |
2027 |
} |
2028 |
else |
2029 |
ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ |
2030 |
|
2031 |
if (w->wd >= 0) |
2032 |
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2033 |
} |
2034 |
|
2035 |
static void noinline |
2036 |
infy_del (EV_P_ ev_stat *w) |
2037 |
{ |
2038 |
int slot; |
2039 |
int wd = w->wd; |
2040 |
|
2041 |
if (wd < 0) |
2042 |
return; |
2043 |
|
2044 |
w->wd = -2; |
2045 |
slot = wd & (EV_INOTIFY_HASHSIZE - 1); |
2046 |
wlist_del (&fs_hash [slot].head, (WL)w); |
2047 |
|
2048 |
/* remove this watcher, if others are watching it, they will rearm */ |
2049 |
inotify_rm_watch (fs_fd, wd); |
2050 |
} |
2051 |
|
2052 |
static void noinline |
2053 |
infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
2054 |
{ |
2055 |
if (slot < 0) |
2056 |
/* overflow, need to check for all hahs slots */ |
2057 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2058 |
infy_wd (EV_A_ slot, wd, ev); |
2059 |
else |
2060 |
{ |
2061 |
WL w_; |
2062 |
|
2063 |
for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) |
2064 |
{ |
2065 |
ev_stat *w = (ev_stat *)w_; |
2066 |
w_ = w_->next; /* lets us remove this watcher and all before it */ |
2067 |
|
2068 |
if (w->wd == wd || wd == -1) |
2069 |
{ |
2070 |
if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
2071 |
{ |
2072 |
w->wd = -1; |
2073 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2074 |
} |
2075 |
|
2076 |
stat_timer_cb (EV_A_ &w->timer, 0); |
2077 |
} |
2078 |
} |
2079 |
} |
2080 |
} |
2081 |
|
2082 |
static void |
2083 |
infy_cb (EV_P_ ev_io *w, int revents) |
2084 |
{ |
2085 |
char buf [EV_INOTIFY_BUFSIZE]; |
2086 |
struct inotify_event *ev = (struct inotify_event *)buf; |
2087 |
int ofs; |
2088 |
int len = read (fs_fd, buf, sizeof (buf)); |
2089 |
|
2090 |
for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
2091 |
infy_wd (EV_A_ ev->wd, ev->wd, ev); |
2092 |
} |
2093 |
|
2094 |
void inline_size |
2095 |
infy_init (EV_P) |
2096 |
{ |
2097 |
if (fs_fd != -2) |
2098 |
return; |
2099 |
|
2100 |
fs_fd = inotify_init (); |
2101 |
|
2102 |
if (fs_fd >= 0) |
2103 |
{ |
2104 |
ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2105 |
ev_set_priority (&fs_w, EV_MAXPRI); |
2106 |
ev_io_start (EV_A_ &fs_w); |
2107 |
} |
2108 |
} |
2109 |
|
2110 |
void inline_size |
2111 |
infy_fork (EV_P) |
2112 |
{ |
2113 |
int slot; |
2114 |
|
2115 |
if (fs_fd < 0) |
2116 |
return; |
2117 |
|
2118 |
close (fs_fd); |
2119 |
fs_fd = inotify_init (); |
2120 |
|
2121 |
for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
2122 |
{ |
2123 |
WL w_ = fs_hash [slot].head; |
2124 |
fs_hash [slot].head = 0; |
2125 |
|
2126 |
while (w_) |
2127 |
{ |
2128 |
ev_stat *w = (ev_stat *)w_; |
2129 |
w_ = w_->next; /* lets us add this watcher */ |
2130 |
|
2131 |
w->wd = -1; |
2132 |
|
2133 |
if (fs_fd >= 0) |
2134 |
infy_add (EV_A_ w); /* re-add, no matter what */ |
2135 |
else |
2136 |
ev_timer_start (EV_A_ &w->timer); |
2137 |
} |
2138 |
|
2139 |
} |
2140 |
} |
2141 |
|
2142 |
#endif |
2143 |
|
2144 |
void |
2145 |
ev_stat_stat (EV_P_ ev_stat *w) |
2146 |
{ |
2147 |
if (lstat (w->path, &w->attr) < 0) |
2148 |
w->attr.st_nlink = 0; |
2149 |
else if (!w->attr.st_nlink) |
2150 |
w->attr.st_nlink = 1; |
2151 |
} |
2152 |
|
2153 |
static void noinline |
2154 |
stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
2155 |
{ |
2156 |
ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
2157 |
|
2158 |
/* we copy this here each the time so that */ |
2159 |
/* prev has the old value when the callback gets invoked */ |
2160 |
w->prev = w->attr; |
2161 |
ev_stat_stat (EV_A_ w); |
2162 |
|
2163 |
/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
2164 |
if ( |
2165 |
w->prev.st_dev != w->attr.st_dev |
2166 |
|| w->prev.st_ino != w->attr.st_ino |
2167 |
|| w->prev.st_mode != w->attr.st_mode |
2168 |
|| w->prev.st_nlink != w->attr.st_nlink |
2169 |
|| w->prev.st_uid != w->attr.st_uid |
2170 |
|| w->prev.st_gid != w->attr.st_gid |
2171 |
|| w->prev.st_rdev != w->attr.st_rdev |
2172 |
|| w->prev.st_size != w->attr.st_size |
2173 |
|| w->prev.st_atime != w->attr.st_atime |
2174 |
|| w->prev.st_mtime != w->attr.st_mtime |
2175 |
|| w->prev.st_ctime != w->attr.st_ctime |
2176 |
) { |
2177 |
#if EV_USE_INOTIFY |
2178 |
infy_del (EV_A_ w); |
2179 |
infy_add (EV_A_ w); |
2180 |
ev_stat_stat (EV_A_ w); /* avoid race... */ |
2181 |
#endif |
2182 |
|
2183 |
ev_feed_event (EV_A_ w, EV_STAT); |
2184 |
} |
2185 |
} |
2186 |
|
2187 |
void |
2188 |
ev_stat_start (EV_P_ ev_stat *w) |
2189 |
{ |
2190 |
if (expect_false (ev_is_active (w))) |
2191 |
return; |
2192 |
|
2193 |
/* since we use memcmp, we need to clear any padding data etc. */ |
2194 |
memset (&w->prev, 0, sizeof (ev_statdata)); |
2195 |
memset (&w->attr, 0, sizeof (ev_statdata)); |
2196 |
|
2197 |
ev_stat_stat (EV_A_ w); |
2198 |
|
2199 |
if (w->interval < MIN_STAT_INTERVAL) |
2200 |
w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL; |
2201 |
|
2202 |
ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); |
2203 |
ev_set_priority (&w->timer, ev_priority (w)); |
2204 |
|
2205 |
#if EV_USE_INOTIFY |
2206 |
infy_init (EV_A); |
2207 |
|
2208 |
if (fs_fd >= 0) |
2209 |
infy_add (EV_A_ w); |
2210 |
else |
2211 |
#endif |
2212 |
ev_timer_start (EV_A_ &w->timer); |
2213 |
|
2214 |
ev_start (EV_A_ (W)w, 1); |
2215 |
} |
2216 |
|
2217 |
void |
2218 |
ev_stat_stop (EV_P_ ev_stat *w) |
2219 |
{ |
2220 |
clear_pending (EV_A_ (W)w); |
2221 |
if (expect_false (!ev_is_active (w))) |
2222 |
return; |
2223 |
|
2224 |
#if EV_USE_INOTIFY |
2225 |
infy_del (EV_A_ w); |
2226 |
#endif |
2227 |
ev_timer_stop (EV_A_ &w->timer); |
2228 |
|
2229 |
ev_stop (EV_A_ (W)w); |
2230 |
} |
2231 |
#endif |
2232 |
|
2233 |
#if EV_IDLE_ENABLE |
2234 |
void |
2235 |
ev_idle_start (EV_P_ ev_idle *w) |
2236 |
{ |
2237 |
if (expect_false (ev_is_active (w))) |
2238 |
return; |
2239 |
|
2240 |
pri_adjust (EV_A_ (W)w); |
2241 |
|
2242 |
{ |
2243 |
int active = ++idlecnt [ABSPRI (w)]; |
2244 |
|
2245 |
++idleall; |
2246 |
ev_start (EV_A_ (W)w, active); |
2247 |
|
2248 |
array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
2249 |
idles [ABSPRI (w)][active - 1] = w; |
2250 |
} |
2251 |
} |
2252 |
|
2253 |
void |
2254 |
ev_idle_stop (EV_P_ ev_idle *w) |
2255 |
{ |
2256 |
clear_pending (EV_A_ (W)w); |
2257 |
if (expect_false (!ev_is_active (w))) |
2258 |
return; |
2259 |
|
2260 |
{ |
2261 |
int active = ((W)w)->active; |
2262 |
|
2263 |
idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
2264 |
((W)idles [ABSPRI (w)][active - 1])->active = active; |
2265 |
|
2266 |
ev_stop (EV_A_ (W)w); |
2267 |
--idleall; |
2268 |
} |
2269 |
} |
2270 |
#endif |
2271 |
|
2272 |
void |
2273 |
ev_prepare_start (EV_P_ ev_prepare *w) |
2274 |
{ |
2275 |
if (expect_false (ev_is_active (w))) |
2276 |
return; |
2277 |
|
2278 |
ev_start (EV_A_ (W)w, ++preparecnt); |
2279 |
array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
2280 |
prepares [preparecnt - 1] = w; |
2281 |
} |
2282 |
|
2283 |
void |
2284 |
ev_prepare_stop (EV_P_ ev_prepare *w) |
2285 |
{ |
2286 |
clear_pending (EV_A_ (W)w); |
2287 |
if (expect_false (!ev_is_active (w))) |
2288 |
return; |
2289 |
|
2290 |
{ |
2291 |
int active = ((W)w)->active; |
2292 |
prepares [active - 1] = prepares [--preparecnt]; |
2293 |
((W)prepares [active - 1])->active = active; |
2294 |
} |
2295 |
|
2296 |
ev_stop (EV_A_ (W)w); |
2297 |
} |
2298 |
|
2299 |
void |
2300 |
ev_check_start (EV_P_ ev_check *w) |
2301 |
{ |
2302 |
if (expect_false (ev_is_active (w))) |
2303 |
return; |
2304 |
|
2305 |
ev_start (EV_A_ (W)w, ++checkcnt); |
2306 |
array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
2307 |
checks [checkcnt - 1] = w; |
2308 |
} |
2309 |
|
2310 |
void |
2311 |
ev_check_stop (EV_P_ ev_check *w) |
2312 |
{ |
2313 |
clear_pending (EV_A_ (W)w); |
2314 |
if (expect_false (!ev_is_active (w))) |
2315 |
return; |
2316 |
|
2317 |
{ |
2318 |
int active = ((W)w)->active; |
2319 |
checks [active - 1] = checks [--checkcnt]; |
2320 |
((W)checks [active - 1])->active = active; |
2321 |
} |
2322 |
|
2323 |
ev_stop (EV_A_ (W)w); |
2324 |
} |
2325 |
|
2326 |
#if EV_EMBED_ENABLE |
2327 |
void noinline |
2328 |
ev_embed_sweep (EV_P_ ev_embed *w) |
2329 |
{ |
2330 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
2331 |
} |
2332 |
|
2333 |
static void |
2334 |
embed_io_cb (EV_P_ ev_io *io, int revents) |
2335 |
{ |
2336 |
ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
2337 |
|
2338 |
if (ev_cb (w)) |
2339 |
ev_feed_event (EV_A_ (W)w, EV_EMBED); |
2340 |
else |
2341 |
ev_loop (w->other, EVLOOP_NONBLOCK); |
2342 |
} |
2343 |
|
2344 |
static void |
2345 |
embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
2346 |
{ |
2347 |
ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
2348 |
|
2349 |
{ |
2350 |
struct ev_loop *loop = w->other; |
2351 |
|
2352 |
while (fdchangecnt) |
2353 |
{ |
2354 |
fd_reify (EV_A); |
2355 |
ev_loop (EV_A_ EVLOOP_NONBLOCK); |
2356 |
} |
2357 |
} |
2358 |
} |
2359 |
|
2360 |
#if 0 |
2361 |
static void |
2362 |
embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
2363 |
{ |
2364 |
ev_idle_stop (EV_A_ idle); |
2365 |
} |
2366 |
#endif |
2367 |
|
2368 |
void |
2369 |
ev_embed_start (EV_P_ ev_embed *w) |
2370 |
{ |
2371 |
if (expect_false (ev_is_active (w))) |
2372 |
return; |
2373 |
|
2374 |
{ |
2375 |
struct ev_loop *loop = w->other; |
2376 |
assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
2377 |
ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
2378 |
} |
2379 |
|
2380 |
ev_set_priority (&w->io, ev_priority (w)); |
2381 |
ev_io_start (EV_A_ &w->io); |
2382 |
|
2383 |
ev_prepare_init (&w->prepare, embed_prepare_cb); |
2384 |
ev_set_priority (&w->prepare, EV_MINPRI); |
2385 |
ev_prepare_start (EV_A_ &w->prepare); |
2386 |
|
2387 |
/*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
2388 |
|
2389 |
ev_start (EV_A_ (W)w, 1); |
2390 |
} |
2391 |
|
2392 |
void |
2393 |
ev_embed_stop (EV_P_ ev_embed *w) |
2394 |
{ |
2395 |
clear_pending (EV_A_ (W)w); |
2396 |
if (expect_false (!ev_is_active (w))) |
2397 |
return; |
2398 |
|
2399 |
ev_io_stop (EV_A_ &w->io); |
2400 |
ev_prepare_stop (EV_A_ &w->prepare); |
2401 |
|
2402 |
ev_stop (EV_A_ (W)w); |
2403 |
} |
2404 |
#endif |
2405 |
|
2406 |
#if EV_FORK_ENABLE |
2407 |
void |
2408 |
ev_fork_start (EV_P_ ev_fork *w) |
2409 |
{ |
2410 |
if (expect_false (ev_is_active (w))) |
2411 |
return; |
2412 |
|
2413 |
ev_start (EV_A_ (W)w, ++forkcnt); |
2414 |
array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
2415 |
forks [forkcnt - 1] = w; |
2416 |
} |
2417 |
|
2418 |
void |
2419 |
ev_fork_stop (EV_P_ ev_fork *w) |
2420 |
{ |
2421 |
clear_pending (EV_A_ (W)w); |
2422 |
if (expect_false (!ev_is_active (w))) |
2423 |
return; |
2424 |
|
2425 |
{ |
2426 |
int active = ((W)w)->active; |
2427 |
forks [active - 1] = forks [--forkcnt]; |
2428 |
((W)forks [active - 1])->active = active; |
2429 |
} |
2430 |
|
2431 |
ev_stop (EV_A_ (W)w); |
2432 |
} |
2433 |
#endif |
2434 |
|
2435 |
#if EV_ASYNC_ENABLE |
2436 |
void |
2437 |
ev_async_start (EV_P_ ev_async *w) |
2438 |
{ |
2439 |
if (expect_false (ev_is_active (w))) |
2440 |
return; |
2441 |
|
2442 |
evpipe_init (EV_A); |
2443 |
|
2444 |
ev_start (EV_A_ (W)w, ++asynccnt); |
2445 |
array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
2446 |
asyncs [asynccnt - 1] = w; |
2447 |
} |
2448 |
|
2449 |
void |
2450 |
ev_async_stop (EV_P_ ev_async *w) |
2451 |
{ |
2452 |
clear_pending (EV_A_ (W)w); |
2453 |
if (expect_false (!ev_is_active (w))) |
2454 |
return; |
2455 |
|
2456 |
{ |
2457 |
int active = ((W)w)->active; |
2458 |
asyncs [active - 1] = asyncs [--asynccnt]; |
2459 |
((W)asyncs [active - 1])->active = active; |
2460 |
} |
2461 |
|
2462 |
ev_stop (EV_A_ (W)w); |
2463 |
} |
2464 |
|
2465 |
void |
2466 |
ev_async_send (EV_P_ ev_async *w) |
2467 |
{ |
2468 |
w->sent = 1; |
2469 |
evpipe_write (EV_A_ 0, 1); |
2470 |
} |
2471 |
#endif |
2472 |
|
2473 |
/*****************************************************************************/ |
2474 |
|
2475 |
struct ev_once |
2476 |
{ |
2477 |
ev_io io; |
2478 |
ev_timer to; |
2479 |
void (*cb)(int revents, void *arg); |
2480 |
void *arg; |
2481 |
}; |
2482 |
|
2483 |
static void |
2484 |
once_cb (EV_P_ struct ev_once *once, int revents) |
2485 |
{ |
2486 |
void (*cb)(int revents, void *arg) = once->cb; |
2487 |
void *arg = once->arg; |
2488 |
|
2489 |
ev_io_stop (EV_A_ &once->io); |
2490 |
ev_timer_stop (EV_A_ &once->to); |
2491 |
ev_free (once); |
2492 |
|
2493 |
cb (revents, arg); |
2494 |
} |
2495 |
|
2496 |
static void |
2497 |
once_cb_io (EV_P_ ev_io *w, int revents) |
2498 |
{ |
2499 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
2500 |
} |
2501 |
|
2502 |
static void |
2503 |
once_cb_to (EV_P_ ev_timer *w, int revents) |
2504 |
{ |
2505 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
2506 |
} |
2507 |
|
2508 |
void |
2509 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
2510 |
{ |
2511 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
2512 |
|
2513 |
if (expect_false (!once)) |
2514 |
{ |
2515 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
2516 |
return; |
2517 |
} |
2518 |
|
2519 |
once->cb = cb; |
2520 |
once->arg = arg; |
2521 |
|
2522 |
ev_init (&once->io, once_cb_io); |
2523 |
if (fd >= 0) |
2524 |
{ |
2525 |
ev_io_set (&once->io, fd, events); |
2526 |
ev_io_start (EV_A_ &once->io); |
2527 |
} |
2528 |
|
2529 |
ev_init (&once->to, once_cb_to); |
2530 |
if (timeout >= 0.) |
2531 |
{ |
2532 |
ev_timer_set (&once->to, timeout, 0.); |
2533 |
ev_timer_start (EV_A_ &once->to); |
2534 |
} |
2535 |
} |
2536 |
|
2537 |
#if EV_MULTIPLICITY |
2538 |
#include "ev_wrap.h" |
2539 |
#endif |
2540 |
|
2541 |
#ifdef __cplusplus |
2542 |
} |
2543 |
#endif |
2544 |
|