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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 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 |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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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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# include "config.h" |
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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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# endif |
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|
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# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (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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# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) |
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# define EV_USE_POLL 1 |
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# endif |
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|
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# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) |
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# define EV_USE_EPOLL 1 |
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# endif |
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|
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# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) |
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# define EV_USE_KQUEUE 1 |
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# endif |
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|
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# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) |
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# define EV_USE_PORT 1 |
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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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#ifndef _WIN32 |
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# include <unistd.h> |
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# include <sys/time.h> |
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# include <sys/wait.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 1 |
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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 1 |
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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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# define EV_SELECT_USE_FD_SET 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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/**/ |
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|
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/* darwin simply cannot be helped */ |
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#ifdef __APPLE__ |
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# undef EV_USE_POLL |
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# undef EV_USE_KQUEUE |
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#endif |
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|
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#ifndef CLOCK_MONOTONIC |
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# undef EV_USE_MONOTONIC |
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# define EV_USE_MONOTONIC 0 |
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#endif |
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|
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#ifndef CLOCK_REALTIME |
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# undef EV_USE_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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|
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#if EV_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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#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
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#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
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#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
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/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
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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 __GNUC__ >= 3 |
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# define expect(expr,value) __builtin_expect ((expr),(value)) |
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# define inline inline |
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#else |
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# define expect(expr,value) (expr) |
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# define inline static |
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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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|
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#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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#define ABSPRI(w) ((w)->priority - EV_MINPRI) |
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|
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#define EMPTY0 /* 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 struct ev_watcher *W; |
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typedef struct ev_watcher_list *WL; |
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typedef struct ev_watcher_time *WT; |
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|
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static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
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|
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#ifdef _WIN32 |
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# include "ev_win32.c" |
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#endif |
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|
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/*****************************************************************************/ |
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|
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static void (*syserr_cb)(const char *msg); |
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|
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void ev_set_syserr_cb (void (*cb)(const char *msg)) |
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{ |
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syserr_cb = cb; |
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} |
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|
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static void |
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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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} |
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} |
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|
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static void *(*alloc)(void *ptr, long size); |
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|
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void 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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static 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)) |
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#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_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" |
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#undef VAR |
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}; |
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#include "ev_wrap.h" |
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|
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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; |
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#include "ev_vars.h" |
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#undef VAR |
280 |
|
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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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/*****************************************************************************/ |
286 |
|
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ev_tstamp |
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ev_time (void) |
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{ |
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#if EV_USE_REALTIME |
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struct timespec ts; |
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clock_gettime (CLOCK_REALTIME, &ts); |
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return ts.tv_sec + ts.tv_nsec * 1e-9; |
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#else |
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struct timeval tv; |
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gettimeofday (&tv, 0); |
297 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
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#endif |
299 |
} |
300 |
|
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inline ev_tstamp |
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get_clock (void) |
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{ |
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#if EV_USE_MONOTONIC |
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if (expect_true (have_monotonic)) |
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{ |
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struct timespec ts; |
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clock_gettime (CLOCK_MONOTONIC, &ts); |
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return ts.tv_sec + ts.tv_nsec * 1e-9; |
310 |
} |
311 |
#endif |
312 |
|
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return ev_time (); |
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} |
315 |
|
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#if EV_MULTIPLICITY |
317 |
ev_tstamp |
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ev_now (EV_P) |
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{ |
320 |
return ev_rt_now; |
321 |
} |
322 |
#endif |
323 |
|
324 |
#define array_roundsize(type,n) (((n) | 4) & ~3) |
325 |
|
326 |
#define array_needsize(type,base,cur,cnt,init) \ |
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if (expect_false ((cnt) > cur)) \ |
328 |
{ \ |
329 |
int newcnt = cur; \ |
330 |
do \ |
331 |
{ \ |
332 |
newcnt = array_roundsize (type, newcnt << 1); \ |
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} \ |
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while ((cnt) > newcnt); \ |
335 |
\ |
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base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ |
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init (base + cur, newcnt - cur); \ |
338 |
cur = newcnt; \ |
339 |
} |
340 |
|
341 |
#define array_slim(type,stem) \ |
342 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
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{ \ |
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stem ## max = array_roundsize (stem ## cnt >> 1); \ |
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base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
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fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
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} |
348 |
|
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#define array_free(stem, idx) \ |
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ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
351 |
|
352 |
/*****************************************************************************/ |
353 |
|
354 |
static void |
355 |
anfds_init (ANFD *base, int count) |
356 |
{ |
357 |
while (count--) |
358 |
{ |
359 |
base->head = 0; |
360 |
base->events = EV_NONE; |
361 |
base->reify = 0; |
362 |
|
363 |
++base; |
364 |
} |
365 |
} |
366 |
|
367 |
void |
368 |
ev_feed_event (EV_P_ void *w, int revents) |
369 |
{ |
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W w_ = (W)w; |
371 |
|
372 |
if (w_->pending) |
373 |
{ |
374 |
pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; |
375 |
return; |
376 |
} |
377 |
|
378 |
w_->pending = ++pendingcnt [ABSPRI (w_)]; |
379 |
array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2); |
380 |
pendings [ABSPRI (w_)][w_->pending - 1].w = w_; |
381 |
pendings [ABSPRI (w_)][w_->pending - 1].events = revents; |
382 |
} |
383 |
|
384 |
static void |
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queue_events (EV_P_ W *events, int eventcnt, int type) |
386 |
{ |
387 |
int i; |
388 |
|
389 |
for (i = 0; i < eventcnt; ++i) |
390 |
ev_feed_event (EV_A_ events [i], type); |
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} |
392 |
|
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inline void |
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fd_event (EV_P_ int fd, int revents) |
395 |
{ |
396 |
ANFD *anfd = anfds + fd; |
397 |
struct ev_io *w; |
398 |
|
399 |
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
400 |
{ |
401 |
int ev = w->events & revents; |
402 |
|
403 |
if (ev) |
404 |
ev_feed_event (EV_A_ (W)w, ev); |
405 |
} |
406 |
} |
407 |
|
408 |
void |
409 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
410 |
{ |
411 |
fd_event (EV_A_ fd, revents); |
412 |
} |
413 |
|
414 |
/*****************************************************************************/ |
415 |
|
416 |
static void |
417 |
fd_reify (EV_P) |
418 |
{ |
419 |
int i; |
420 |
|
421 |
for (i = 0; i < fdchangecnt; ++i) |
422 |
{ |
423 |
int fd = fdchanges [i]; |
424 |
ANFD *anfd = anfds + fd; |
425 |
struct ev_io *w; |
426 |
|
427 |
int events = 0; |
428 |
|
429 |
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
430 |
events |= w->events; |
431 |
|
432 |
#if EV_SELECT_IS_WINSOCKET |
433 |
if (events) |
434 |
{ |
435 |
unsigned long argp; |
436 |
anfd->handle = _get_osfhandle (fd); |
437 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
438 |
} |
439 |
#endif |
440 |
|
441 |
anfd->reify = 0; |
442 |
|
443 |
method_modify (EV_A_ fd, anfd->events, events); |
444 |
anfd->events = events; |
445 |
} |
446 |
|
447 |
fdchangecnt = 0; |
448 |
} |
449 |
|
450 |
static void |
451 |
fd_change (EV_P_ int fd) |
452 |
{ |
453 |
if (anfds [fd].reify) |
454 |
return; |
455 |
|
456 |
anfds [fd].reify = 1; |
457 |
|
458 |
++fdchangecnt; |
459 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
460 |
fdchanges [fdchangecnt - 1] = fd; |
461 |
} |
462 |
|
463 |
static void |
464 |
fd_kill (EV_P_ int fd) |
465 |
{ |
466 |
struct ev_io *w; |
467 |
|
468 |
while ((w = (struct ev_io *)anfds [fd].head)) |
469 |
{ |
470 |
ev_io_stop (EV_A_ w); |
471 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
472 |
} |
473 |
} |
474 |
|
475 |
static int |
476 |
fd_valid (int fd) |
477 |
{ |
478 |
#ifdef _WIN32 |
479 |
return _get_osfhandle (fd) != -1; |
480 |
#else |
481 |
return fcntl (fd, F_GETFD) != -1; |
482 |
#endif |
483 |
} |
484 |
|
485 |
/* called on EBADF to verify fds */ |
486 |
static void |
487 |
fd_ebadf (EV_P) |
488 |
{ |
489 |
int fd; |
490 |
|
491 |
for (fd = 0; fd < anfdmax; ++fd) |
492 |
if (anfds [fd].events) |
493 |
if (!fd_valid (fd) == -1 && errno == EBADF) |
494 |
fd_kill (EV_A_ fd); |
495 |
} |
496 |
|
497 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
498 |
static void |
499 |
fd_enomem (EV_P) |
500 |
{ |
501 |
int fd; |
502 |
|
503 |
for (fd = anfdmax; fd--; ) |
504 |
if (anfds [fd].events) |
505 |
{ |
506 |
fd_kill (EV_A_ fd); |
507 |
return; |
508 |
} |
509 |
} |
510 |
|
511 |
/* usually called after fork if method needs to re-arm all fds from scratch */ |
512 |
static void |
513 |
fd_rearm_all (EV_P) |
514 |
{ |
515 |
int fd; |
516 |
|
517 |
/* this should be highly optimised to not do anything but set a flag */ |
518 |
for (fd = 0; fd < anfdmax; ++fd) |
519 |
if (anfds [fd].events) |
520 |
{ |
521 |
anfds [fd].events = 0; |
522 |
fd_change (EV_A_ fd); |
523 |
} |
524 |
} |
525 |
|
526 |
/*****************************************************************************/ |
527 |
|
528 |
static void |
529 |
upheap (WT *heap, int k) |
530 |
{ |
531 |
WT w = heap [k]; |
532 |
|
533 |
while (k && heap [k >> 1]->at > w->at) |
534 |
{ |
535 |
heap [k] = heap [k >> 1]; |
536 |
((W)heap [k])->active = k + 1; |
537 |
k >>= 1; |
538 |
} |
539 |
|
540 |
heap [k] = w; |
541 |
((W)heap [k])->active = k + 1; |
542 |
|
543 |
} |
544 |
|
545 |
static void |
546 |
downheap (WT *heap, int N, int k) |
547 |
{ |
548 |
WT w = heap [k]; |
549 |
|
550 |
while (k < (N >> 1)) |
551 |
{ |
552 |
int j = k << 1; |
553 |
|
554 |
if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
555 |
++j; |
556 |
|
557 |
if (w->at <= heap [j]->at) |
558 |
break; |
559 |
|
560 |
heap [k] = heap [j]; |
561 |
((W)heap [k])->active = k + 1; |
562 |
k = j; |
563 |
} |
564 |
|
565 |
heap [k] = w; |
566 |
((W)heap [k])->active = k + 1; |
567 |
} |
568 |
|
569 |
inline void |
570 |
adjustheap (WT *heap, int N, int k) |
571 |
{ |
572 |
upheap (heap, k); |
573 |
downheap (heap, N, k); |
574 |
} |
575 |
|
576 |
/*****************************************************************************/ |
577 |
|
578 |
typedef struct |
579 |
{ |
580 |
WL head; |
581 |
sig_atomic_t volatile gotsig; |
582 |
} ANSIG; |
583 |
|
584 |
static ANSIG *signals; |
585 |
static int signalmax; |
586 |
|
587 |
static int sigpipe [2]; |
588 |
static sig_atomic_t volatile gotsig; |
589 |
static struct ev_io sigev; |
590 |
|
591 |
static void |
592 |
signals_init (ANSIG *base, int count) |
593 |
{ |
594 |
while (count--) |
595 |
{ |
596 |
base->head = 0; |
597 |
base->gotsig = 0; |
598 |
|
599 |
++base; |
600 |
} |
601 |
} |
602 |
|
603 |
static void |
604 |
sighandler (int signum) |
605 |
{ |
606 |
#if _WIN32 |
607 |
signal (signum, sighandler); |
608 |
#endif |
609 |
|
610 |
signals [signum - 1].gotsig = 1; |
611 |
|
612 |
if (!gotsig) |
613 |
{ |
614 |
int old_errno = errno; |
615 |
gotsig = 1; |
616 |
write (sigpipe [1], &signum, 1); |
617 |
errno = old_errno; |
618 |
} |
619 |
} |
620 |
|
621 |
void |
622 |
ev_feed_signal_event (EV_P_ int signum) |
623 |
{ |
624 |
WL w; |
625 |
|
626 |
#if EV_MULTIPLICITY |
627 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
628 |
#endif |
629 |
|
630 |
--signum; |
631 |
|
632 |
if (signum < 0 || signum >= signalmax) |
633 |
return; |
634 |
|
635 |
signals [signum].gotsig = 0; |
636 |
|
637 |
for (w = signals [signum].head; w; w = w->next) |
638 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
639 |
} |
640 |
|
641 |
static void |
642 |
sigcb (EV_P_ struct ev_io *iow, int revents) |
643 |
{ |
644 |
int signum; |
645 |
|
646 |
read (sigpipe [0], &revents, 1); |
647 |
gotsig = 0; |
648 |
|
649 |
for (signum = signalmax; signum--; ) |
650 |
if (signals [signum].gotsig) |
651 |
ev_feed_signal_event (EV_A_ signum + 1); |
652 |
} |
653 |
|
654 |
inline void |
655 |
fd_intern (int fd) |
656 |
{ |
657 |
#ifdef _WIN32 |
658 |
int arg = 1; |
659 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
660 |
#else |
661 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
662 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
663 |
#endif |
664 |
} |
665 |
|
666 |
static void |
667 |
siginit (EV_P) |
668 |
{ |
669 |
fd_intern (sigpipe [0]); |
670 |
fd_intern (sigpipe [1]); |
671 |
|
672 |
ev_io_set (&sigev, sigpipe [0], EV_READ); |
673 |
ev_io_start (EV_A_ &sigev); |
674 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
675 |
} |
676 |
|
677 |
/*****************************************************************************/ |
678 |
|
679 |
static struct ev_child *childs [PID_HASHSIZE]; |
680 |
|
681 |
#ifndef _WIN32 |
682 |
|
683 |
static struct ev_signal childev; |
684 |
|
685 |
#ifndef WCONTINUED |
686 |
# define WCONTINUED 0 |
687 |
#endif |
688 |
|
689 |
static void |
690 |
child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) |
691 |
{ |
692 |
struct ev_child *w; |
693 |
|
694 |
for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) |
695 |
if (w->pid == pid || !w->pid) |
696 |
{ |
697 |
ev_priority (w) = ev_priority (sw); /* need to do it *now* */ |
698 |
w->rpid = pid; |
699 |
w->rstatus = status; |
700 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
701 |
} |
702 |
} |
703 |
|
704 |
static void |
705 |
childcb (EV_P_ struct ev_signal *sw, int revents) |
706 |
{ |
707 |
int pid, status; |
708 |
|
709 |
if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
710 |
{ |
711 |
/* make sure we are called again until all childs have been reaped */ |
712 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
713 |
|
714 |
child_reap (EV_A_ sw, pid, pid, status); |
715 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ |
716 |
} |
717 |
} |
718 |
|
719 |
#endif |
720 |
|
721 |
/*****************************************************************************/ |
722 |
|
723 |
#if EV_USE_PORT |
724 |
# include "ev_port.c" |
725 |
#endif |
726 |
#if EV_USE_KQUEUE |
727 |
# include "ev_kqueue.c" |
728 |
#endif |
729 |
#if EV_USE_EPOLL |
730 |
# include "ev_epoll.c" |
731 |
#endif |
732 |
#if EV_USE_POLL |
733 |
# include "ev_poll.c" |
734 |
#endif |
735 |
#if EV_USE_SELECT |
736 |
# include "ev_select.c" |
737 |
#endif |
738 |
|
739 |
int |
740 |
ev_version_major (void) |
741 |
{ |
742 |
return EV_VERSION_MAJOR; |
743 |
} |
744 |
|
745 |
int |
746 |
ev_version_minor (void) |
747 |
{ |
748 |
return EV_VERSION_MINOR; |
749 |
} |
750 |
|
751 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
752 |
static int |
753 |
enable_secure (void) |
754 |
{ |
755 |
#ifdef _WIN32 |
756 |
return 0; |
757 |
#else |
758 |
return getuid () != geteuid () |
759 |
|| getgid () != getegid (); |
760 |
#endif |
761 |
} |
762 |
|
763 |
unsigned int |
764 |
ev_method (EV_P) |
765 |
{ |
766 |
return method; |
767 |
} |
768 |
|
769 |
static void |
770 |
loop_init (EV_P_ unsigned int flags) |
771 |
{ |
772 |
if (!method) |
773 |
{ |
774 |
#if EV_USE_MONOTONIC |
775 |
{ |
776 |
struct timespec ts; |
777 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
778 |
have_monotonic = 1; |
779 |
} |
780 |
#endif |
781 |
|
782 |
ev_rt_now = ev_time (); |
783 |
mn_now = get_clock (); |
784 |
now_floor = mn_now; |
785 |
rtmn_diff = ev_rt_now - mn_now; |
786 |
|
787 |
if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) |
788 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
789 |
|
790 |
if (!(flags & 0x0000ffff)) |
791 |
flags |= 0x0000ffff; |
792 |
|
793 |
method = 0; |
794 |
#if EV_USE_PORT |
795 |
if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); |
796 |
#endif |
797 |
#if EV_USE_KQUEUE |
798 |
if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); |
799 |
#endif |
800 |
#if EV_USE_EPOLL |
801 |
if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); |
802 |
#endif |
803 |
#if EV_USE_POLL |
804 |
if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); |
805 |
#endif |
806 |
#if EV_USE_SELECT |
807 |
if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); |
808 |
#endif |
809 |
|
810 |
ev_init (&sigev, sigcb); |
811 |
ev_set_priority (&sigev, EV_MAXPRI); |
812 |
} |
813 |
} |
814 |
|
815 |
void |
816 |
loop_destroy (EV_P) |
817 |
{ |
818 |
int i; |
819 |
|
820 |
#if EV_USE_PORT |
821 |
if (method == EVMETHOD_PORT ) port_destroy (EV_A); |
822 |
#endif |
823 |
#if EV_USE_KQUEUE |
824 |
if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); |
825 |
#endif |
826 |
#if EV_USE_EPOLL |
827 |
if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); |
828 |
#endif |
829 |
#if EV_USE_POLL |
830 |
if (method == EVMETHOD_POLL ) poll_destroy (EV_A); |
831 |
#endif |
832 |
#if EV_USE_SELECT |
833 |
if (method == EVMETHOD_SELECT) select_destroy (EV_A); |
834 |
#endif |
835 |
|
836 |
for (i = NUMPRI; i--; ) |
837 |
array_free (pending, [i]); |
838 |
|
839 |
/* have to use the microsoft-never-gets-it-right macro */ |
840 |
array_free (fdchange, EMPTY0); |
841 |
array_free (timer, EMPTY0); |
842 |
#if EV_PERIODICS |
843 |
array_free (periodic, EMPTY0); |
844 |
#endif |
845 |
array_free (idle, EMPTY0); |
846 |
array_free (prepare, EMPTY0); |
847 |
array_free (check, EMPTY0); |
848 |
|
849 |
method = 0; |
850 |
} |
851 |
|
852 |
static void |
853 |
loop_fork (EV_P) |
854 |
{ |
855 |
#if EV_USE_PORT |
856 |
if (method == EVMETHOD_PORT ) port_fork (EV_A); |
857 |
#endif |
858 |
#if EV_USE_KQUEUE |
859 |
if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); |
860 |
#endif |
861 |
#if EV_USE_EPOLL |
862 |
if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); |
863 |
#endif |
864 |
|
865 |
if (ev_is_active (&sigev)) |
866 |
{ |
867 |
/* default loop */ |
868 |
|
869 |
ev_ref (EV_A); |
870 |
ev_io_stop (EV_A_ &sigev); |
871 |
close (sigpipe [0]); |
872 |
close (sigpipe [1]); |
873 |
|
874 |
while (pipe (sigpipe)) |
875 |
syserr ("(libev) error creating pipe"); |
876 |
|
877 |
siginit (EV_A); |
878 |
} |
879 |
|
880 |
postfork = 0; |
881 |
} |
882 |
|
883 |
#if EV_MULTIPLICITY |
884 |
struct ev_loop * |
885 |
ev_loop_new (unsigned int flags) |
886 |
{ |
887 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
888 |
|
889 |
memset (loop, 0, sizeof (struct ev_loop)); |
890 |
|
891 |
loop_init (EV_A_ flags); |
892 |
|
893 |
if (ev_method (EV_A)) |
894 |
return loop; |
895 |
|
896 |
return 0; |
897 |
} |
898 |
|
899 |
void |
900 |
ev_loop_destroy (EV_P) |
901 |
{ |
902 |
loop_destroy (EV_A); |
903 |
ev_free (loop); |
904 |
} |
905 |
|
906 |
void |
907 |
ev_loop_fork (EV_P) |
908 |
{ |
909 |
postfork = 1; |
910 |
} |
911 |
|
912 |
#endif |
913 |
|
914 |
#if EV_MULTIPLICITY |
915 |
struct ev_loop * |
916 |
ev_default_loop_ (unsigned int flags) |
917 |
#else |
918 |
int |
919 |
ev_default_loop (unsigned int flags) |
920 |
#endif |
921 |
{ |
922 |
if (sigpipe [0] == sigpipe [1]) |
923 |
if (pipe (sigpipe)) |
924 |
return 0; |
925 |
|
926 |
if (!ev_default_loop_ptr) |
927 |
{ |
928 |
#if EV_MULTIPLICITY |
929 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
930 |
#else |
931 |
ev_default_loop_ptr = 1; |
932 |
#endif |
933 |
|
934 |
loop_init (EV_A_ flags); |
935 |
|
936 |
if (ev_method (EV_A)) |
937 |
{ |
938 |
siginit (EV_A); |
939 |
|
940 |
#ifndef _WIN32 |
941 |
ev_signal_init (&childev, childcb, SIGCHLD); |
942 |
ev_set_priority (&childev, EV_MAXPRI); |
943 |
ev_signal_start (EV_A_ &childev); |
944 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
945 |
#endif |
946 |
} |
947 |
else |
948 |
ev_default_loop_ptr = 0; |
949 |
} |
950 |
|
951 |
return ev_default_loop_ptr; |
952 |
} |
953 |
|
954 |
void |
955 |
ev_default_destroy (void) |
956 |
{ |
957 |
#if EV_MULTIPLICITY |
958 |
struct ev_loop *loop = ev_default_loop_ptr; |
959 |
#endif |
960 |
|
961 |
#ifndef _WIN32 |
962 |
ev_ref (EV_A); /* child watcher */ |
963 |
ev_signal_stop (EV_A_ &childev); |
964 |
#endif |
965 |
|
966 |
ev_ref (EV_A); /* signal watcher */ |
967 |
ev_io_stop (EV_A_ &sigev); |
968 |
|
969 |
close (sigpipe [0]); sigpipe [0] = 0; |
970 |
close (sigpipe [1]); sigpipe [1] = 0; |
971 |
|
972 |
loop_destroy (EV_A); |
973 |
} |
974 |
|
975 |
void |
976 |
ev_default_fork (void) |
977 |
{ |
978 |
#if EV_MULTIPLICITY |
979 |
struct ev_loop *loop = ev_default_loop_ptr; |
980 |
#endif |
981 |
|
982 |
if (method) |
983 |
postfork = 1; |
984 |
} |
985 |
|
986 |
/*****************************************************************************/ |
987 |
|
988 |
static int |
989 |
any_pending (EV_P) |
990 |
{ |
991 |
int pri; |
992 |
|
993 |
for (pri = NUMPRI; pri--; ) |
994 |
if (pendingcnt [pri]) |
995 |
return 1; |
996 |
|
997 |
return 0; |
998 |
} |
999 |
|
1000 |
static void |
1001 |
call_pending (EV_P) |
1002 |
{ |
1003 |
int pri; |
1004 |
|
1005 |
for (pri = NUMPRI; pri--; ) |
1006 |
while (pendingcnt [pri]) |
1007 |
{ |
1008 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
1009 |
|
1010 |
if (p->w) |
1011 |
{ |
1012 |
p->w->pending = 0; |
1013 |
EV_CB_INVOKE (p->w, p->events); |
1014 |
} |
1015 |
} |
1016 |
} |
1017 |
|
1018 |
static void |
1019 |
timers_reify (EV_P) |
1020 |
{ |
1021 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
1022 |
{ |
1023 |
struct ev_timer *w = timers [0]; |
1024 |
|
1025 |
assert (("inactive timer on timer heap detected", ev_is_active (w))); |
1026 |
|
1027 |
/* first reschedule or stop timer */ |
1028 |
if (w->repeat) |
1029 |
{ |
1030 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
1031 |
|
1032 |
((WT)w)->at += w->repeat; |
1033 |
if (((WT)w)->at < mn_now) |
1034 |
((WT)w)->at = mn_now; |
1035 |
|
1036 |
downheap ((WT *)timers, timercnt, 0); |
1037 |
} |
1038 |
else |
1039 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1040 |
|
1041 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
1042 |
} |
1043 |
} |
1044 |
|
1045 |
#if EV_PERIODICS |
1046 |
static void |
1047 |
periodics_reify (EV_P) |
1048 |
{ |
1049 |
while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
1050 |
{ |
1051 |
struct ev_periodic *w = periodics [0]; |
1052 |
|
1053 |
assert (("inactive timer on periodic heap detected", ev_is_active (w))); |
1054 |
|
1055 |
/* first reschedule or stop timer */ |
1056 |
if (w->reschedule_cb) |
1057 |
{ |
1058 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); |
1059 |
assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
1060 |
downheap ((WT *)periodics, periodiccnt, 0); |
1061 |
} |
1062 |
else if (w->interval) |
1063 |
{ |
1064 |
((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; |
1065 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
1066 |
downheap ((WT *)periodics, periodiccnt, 0); |
1067 |
} |
1068 |
else |
1069 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
1070 |
|
1071 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
1072 |
} |
1073 |
} |
1074 |
|
1075 |
static void |
1076 |
periodics_reschedule (EV_P) |
1077 |
{ |
1078 |
int i; |
1079 |
|
1080 |
/* adjust periodics after time jump */ |
1081 |
for (i = 0; i < periodiccnt; ++i) |
1082 |
{ |
1083 |
struct ev_periodic *w = periodics [i]; |
1084 |
|
1085 |
if (w->reschedule_cb) |
1086 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1087 |
else if (w->interval) |
1088 |
((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; |
1089 |
} |
1090 |
|
1091 |
/* now rebuild the heap */ |
1092 |
for (i = periodiccnt >> 1; i--; ) |
1093 |
downheap ((WT *)periodics, periodiccnt, i); |
1094 |
} |
1095 |
#endif |
1096 |
|
1097 |
inline int |
1098 |
time_update_monotonic (EV_P) |
1099 |
{ |
1100 |
mn_now = get_clock (); |
1101 |
|
1102 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
1103 |
{ |
1104 |
ev_rt_now = rtmn_diff + mn_now; |
1105 |
return 0; |
1106 |
} |
1107 |
else |
1108 |
{ |
1109 |
now_floor = mn_now; |
1110 |
ev_rt_now = ev_time (); |
1111 |
return 1; |
1112 |
} |
1113 |
} |
1114 |
|
1115 |
static void |
1116 |
time_update (EV_P) |
1117 |
{ |
1118 |
int i; |
1119 |
|
1120 |
#if EV_USE_MONOTONIC |
1121 |
if (expect_true (have_monotonic)) |
1122 |
{ |
1123 |
if (time_update_monotonic (EV_A)) |
1124 |
{ |
1125 |
ev_tstamp odiff = rtmn_diff; |
1126 |
|
1127 |
for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
1128 |
{ |
1129 |
rtmn_diff = ev_rt_now - mn_now; |
1130 |
|
1131 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
1132 |
return; /* all is well */ |
1133 |
|
1134 |
ev_rt_now = ev_time (); |
1135 |
mn_now = get_clock (); |
1136 |
now_floor = mn_now; |
1137 |
} |
1138 |
|
1139 |
# if EV_PERIODICS |
1140 |
periodics_reschedule (EV_A); |
1141 |
# endif |
1142 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
1143 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
1144 |
} |
1145 |
} |
1146 |
else |
1147 |
#endif |
1148 |
{ |
1149 |
ev_rt_now = ev_time (); |
1150 |
|
1151 |
if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
1152 |
{ |
1153 |
#if EV_PERIODICS |
1154 |
periodics_reschedule (EV_A); |
1155 |
#endif |
1156 |
|
1157 |
/* adjust timers. this is easy, as the offset is the same for all */ |
1158 |
for (i = 0; i < timercnt; ++i) |
1159 |
((WT)timers [i])->at += ev_rt_now - mn_now; |
1160 |
} |
1161 |
|
1162 |
mn_now = ev_rt_now; |
1163 |
} |
1164 |
} |
1165 |
|
1166 |
void |
1167 |
ev_ref (EV_P) |
1168 |
{ |
1169 |
++activecnt; |
1170 |
} |
1171 |
|
1172 |
void |
1173 |
ev_unref (EV_P) |
1174 |
{ |
1175 |
--activecnt; |
1176 |
} |
1177 |
|
1178 |
static int loop_done; |
1179 |
|
1180 |
void |
1181 |
ev_loop (EV_P_ int flags) |
1182 |
{ |
1183 |
double block; |
1184 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
1185 |
|
1186 |
while (activecnt) |
1187 |
{ |
1188 |
/* queue check watchers (and execute them) */ |
1189 |
if (expect_false (preparecnt)) |
1190 |
{ |
1191 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
1192 |
call_pending (EV_A); |
1193 |
} |
1194 |
|
1195 |
/* we might have forked, so reify kernel state if necessary */ |
1196 |
if (expect_false (postfork)) |
1197 |
loop_fork (EV_A); |
1198 |
|
1199 |
/* update fd-related kernel structures */ |
1200 |
fd_reify (EV_A); |
1201 |
|
1202 |
/* calculate blocking time */ |
1203 |
|
1204 |
/* we only need this for !monotonic clock or timers, but as we basically |
1205 |
always have timers, we just calculate it always */ |
1206 |
#if EV_USE_MONOTONIC |
1207 |
if (expect_true (have_monotonic)) |
1208 |
time_update_monotonic (EV_A); |
1209 |
else |
1210 |
#endif |
1211 |
{ |
1212 |
ev_rt_now = ev_time (); |
1213 |
mn_now = ev_rt_now; |
1214 |
} |
1215 |
|
1216 |
if (flags & EVLOOP_NONBLOCK || idlecnt) |
1217 |
block = 0.; |
1218 |
else |
1219 |
{ |
1220 |
block = MAX_BLOCKTIME; |
1221 |
|
1222 |
if (timercnt) |
1223 |
{ |
1224 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; |
1225 |
if (block > to) block = to; |
1226 |
} |
1227 |
|
1228 |
#if EV_PERIODICS |
1229 |
if (periodiccnt) |
1230 |
{ |
1231 |
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; |
1232 |
if (block > to) block = to; |
1233 |
} |
1234 |
#endif |
1235 |
|
1236 |
if (block < 0.) block = 0.; |
1237 |
} |
1238 |
|
1239 |
method_poll (EV_A_ block); |
1240 |
|
1241 |
/* update ev_rt_now, do magic */ |
1242 |
time_update (EV_A); |
1243 |
|
1244 |
/* queue pending timers and reschedule them */ |
1245 |
timers_reify (EV_A); /* relative timers called last */ |
1246 |
#if EV_PERIODICS |
1247 |
periodics_reify (EV_A); /* absolute timers called first */ |
1248 |
#endif |
1249 |
|
1250 |
/* queue idle watchers unless io or timers are pending */ |
1251 |
if (idlecnt && !any_pending (EV_A)) |
1252 |
queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); |
1253 |
|
1254 |
/* queue check watchers, to be executed first */ |
1255 |
if (checkcnt) |
1256 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
1257 |
|
1258 |
call_pending (EV_A); |
1259 |
|
1260 |
if (loop_done) |
1261 |
break; |
1262 |
} |
1263 |
|
1264 |
if (loop_done != 2) |
1265 |
loop_done = 0; |
1266 |
} |
1267 |
|
1268 |
void |
1269 |
ev_unloop (EV_P_ int how) |
1270 |
{ |
1271 |
loop_done = how; |
1272 |
} |
1273 |
|
1274 |
/*****************************************************************************/ |
1275 |
|
1276 |
inline void |
1277 |
wlist_add (WL *head, WL elem) |
1278 |
{ |
1279 |
elem->next = *head; |
1280 |
*head = elem; |
1281 |
} |
1282 |
|
1283 |
inline void |
1284 |
wlist_del (WL *head, WL elem) |
1285 |
{ |
1286 |
while (*head) |
1287 |
{ |
1288 |
if (*head == elem) |
1289 |
{ |
1290 |
*head = elem->next; |
1291 |
return; |
1292 |
} |
1293 |
|
1294 |
head = &(*head)->next; |
1295 |
} |
1296 |
} |
1297 |
|
1298 |
inline void |
1299 |
ev_clear_pending (EV_P_ W w) |
1300 |
{ |
1301 |
if (w->pending) |
1302 |
{ |
1303 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
1304 |
w->pending = 0; |
1305 |
} |
1306 |
} |
1307 |
|
1308 |
inline void |
1309 |
ev_start (EV_P_ W w, int active) |
1310 |
{ |
1311 |
if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
1312 |
if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
1313 |
|
1314 |
w->active = active; |
1315 |
ev_ref (EV_A); |
1316 |
} |
1317 |
|
1318 |
inline void |
1319 |
ev_stop (EV_P_ W w) |
1320 |
{ |
1321 |
ev_unref (EV_A); |
1322 |
w->active = 0; |
1323 |
} |
1324 |
|
1325 |
/*****************************************************************************/ |
1326 |
|
1327 |
void |
1328 |
ev_io_start (EV_P_ struct ev_io *w) |
1329 |
{ |
1330 |
int fd = w->fd; |
1331 |
|
1332 |
if (ev_is_active (w)) |
1333 |
return; |
1334 |
|
1335 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
1336 |
|
1337 |
ev_start (EV_A_ (W)w, 1); |
1338 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
1339 |
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
1340 |
|
1341 |
fd_change (EV_A_ fd); |
1342 |
} |
1343 |
|
1344 |
void |
1345 |
ev_io_stop (EV_P_ struct ev_io *w) |
1346 |
{ |
1347 |
ev_clear_pending (EV_A_ (W)w); |
1348 |
if (!ev_is_active (w)) |
1349 |
return; |
1350 |
|
1351 |
assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
1352 |
|
1353 |
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
1354 |
ev_stop (EV_A_ (W)w); |
1355 |
|
1356 |
fd_change (EV_A_ w->fd); |
1357 |
} |
1358 |
|
1359 |
void |
1360 |
ev_timer_start (EV_P_ struct ev_timer *w) |
1361 |
{ |
1362 |
if (ev_is_active (w)) |
1363 |
return; |
1364 |
|
1365 |
((WT)w)->at += mn_now; |
1366 |
|
1367 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
1368 |
|
1369 |
ev_start (EV_A_ (W)w, ++timercnt); |
1370 |
array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); |
1371 |
timers [timercnt - 1] = w; |
1372 |
upheap ((WT *)timers, timercnt - 1); |
1373 |
|
1374 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
1375 |
} |
1376 |
|
1377 |
void |
1378 |
ev_timer_stop (EV_P_ struct ev_timer *w) |
1379 |
{ |
1380 |
ev_clear_pending (EV_A_ (W)w); |
1381 |
if (!ev_is_active (w)) |
1382 |
return; |
1383 |
|
1384 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
1385 |
|
1386 |
if (((W)w)->active < timercnt--) |
1387 |
{ |
1388 |
timers [((W)w)->active - 1] = timers [timercnt]; |
1389 |
adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
1390 |
} |
1391 |
|
1392 |
((WT)w)->at -= mn_now; |
1393 |
|
1394 |
ev_stop (EV_A_ (W)w); |
1395 |
} |
1396 |
|
1397 |
void |
1398 |
ev_timer_again (EV_P_ struct ev_timer *w) |
1399 |
{ |
1400 |
if (ev_is_active (w)) |
1401 |
{ |
1402 |
if (w->repeat) |
1403 |
{ |
1404 |
((WT)w)->at = mn_now + w->repeat; |
1405 |
adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
1406 |
} |
1407 |
else |
1408 |
ev_timer_stop (EV_A_ w); |
1409 |
} |
1410 |
else if (w->repeat) |
1411 |
{ |
1412 |
w->at = w->repeat; |
1413 |
ev_timer_start (EV_A_ w); |
1414 |
} |
1415 |
} |
1416 |
|
1417 |
#if EV_PERIODICS |
1418 |
void |
1419 |
ev_periodic_start (EV_P_ struct ev_periodic *w) |
1420 |
{ |
1421 |
if (ev_is_active (w)) |
1422 |
return; |
1423 |
|
1424 |
if (w->reschedule_cb) |
1425 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
1426 |
else if (w->interval) |
1427 |
{ |
1428 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
1429 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
1430 |
((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; |
1431 |
} |
1432 |
|
1433 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
1434 |
array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); |
1435 |
periodics [periodiccnt - 1] = w; |
1436 |
upheap ((WT *)periodics, periodiccnt - 1); |
1437 |
|
1438 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
1439 |
} |
1440 |
|
1441 |
void |
1442 |
ev_periodic_stop (EV_P_ struct ev_periodic *w) |
1443 |
{ |
1444 |
ev_clear_pending (EV_A_ (W)w); |
1445 |
if (!ev_is_active (w)) |
1446 |
return; |
1447 |
|
1448 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
1449 |
|
1450 |
if (((W)w)->active < periodiccnt--) |
1451 |
{ |
1452 |
periodics [((W)w)->active - 1] = periodics [periodiccnt]; |
1453 |
adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); |
1454 |
} |
1455 |
|
1456 |
ev_stop (EV_A_ (W)w); |
1457 |
} |
1458 |
|
1459 |
void |
1460 |
ev_periodic_again (EV_P_ struct ev_periodic *w) |
1461 |
{ |
1462 |
/* TODO: use adjustheap and recalculation */ |
1463 |
ev_periodic_stop (EV_A_ w); |
1464 |
ev_periodic_start (EV_A_ w); |
1465 |
} |
1466 |
#endif |
1467 |
|
1468 |
void |
1469 |
ev_idle_start (EV_P_ struct ev_idle *w) |
1470 |
{ |
1471 |
if (ev_is_active (w)) |
1472 |
return; |
1473 |
|
1474 |
ev_start (EV_A_ (W)w, ++idlecnt); |
1475 |
array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); |
1476 |
idles [idlecnt - 1] = w; |
1477 |
} |
1478 |
|
1479 |
void |
1480 |
ev_idle_stop (EV_P_ struct ev_idle *w) |
1481 |
{ |
1482 |
ev_clear_pending (EV_A_ (W)w); |
1483 |
if (!ev_is_active (w)) |
1484 |
return; |
1485 |
|
1486 |
idles [((W)w)->active - 1] = idles [--idlecnt]; |
1487 |
ev_stop (EV_A_ (W)w); |
1488 |
} |
1489 |
|
1490 |
void |
1491 |
ev_prepare_start (EV_P_ struct ev_prepare *w) |
1492 |
{ |
1493 |
if (ev_is_active (w)) |
1494 |
return; |
1495 |
|
1496 |
ev_start (EV_A_ (W)w, ++preparecnt); |
1497 |
array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
1498 |
prepares [preparecnt - 1] = w; |
1499 |
} |
1500 |
|
1501 |
void |
1502 |
ev_prepare_stop (EV_P_ struct ev_prepare *w) |
1503 |
{ |
1504 |
ev_clear_pending (EV_A_ (W)w); |
1505 |
if (!ev_is_active (w)) |
1506 |
return; |
1507 |
|
1508 |
prepares [((W)w)->active - 1] = prepares [--preparecnt]; |
1509 |
ev_stop (EV_A_ (W)w); |
1510 |
} |
1511 |
|
1512 |
void |
1513 |
ev_check_start (EV_P_ struct ev_check *w) |
1514 |
{ |
1515 |
if (ev_is_active (w)) |
1516 |
return; |
1517 |
|
1518 |
ev_start (EV_A_ (W)w, ++checkcnt); |
1519 |
array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2); |
1520 |
checks [checkcnt - 1] = w; |
1521 |
} |
1522 |
|
1523 |
void |
1524 |
ev_check_stop (EV_P_ struct ev_check *w) |
1525 |
{ |
1526 |
ev_clear_pending (EV_A_ (W)w); |
1527 |
if (!ev_is_active (w)) |
1528 |
return; |
1529 |
|
1530 |
checks [((W)w)->active - 1] = checks [--checkcnt]; |
1531 |
ev_stop (EV_A_ (W)w); |
1532 |
} |
1533 |
|
1534 |
#ifndef SA_RESTART |
1535 |
# define SA_RESTART 0 |
1536 |
#endif |
1537 |
|
1538 |
void |
1539 |
ev_signal_start (EV_P_ struct ev_signal *w) |
1540 |
{ |
1541 |
#if EV_MULTIPLICITY |
1542 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1543 |
#endif |
1544 |
if (ev_is_active (w)) |
1545 |
return; |
1546 |
|
1547 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
1548 |
|
1549 |
ev_start (EV_A_ (W)w, 1); |
1550 |
array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
1551 |
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1552 |
|
1553 |
if (!((WL)w)->next) |
1554 |
{ |
1555 |
#if _WIN32 |
1556 |
signal (w->signum, sighandler); |
1557 |
#else |
1558 |
struct sigaction sa; |
1559 |
sa.sa_handler = sighandler; |
1560 |
sigfillset (&sa.sa_mask); |
1561 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
1562 |
sigaction (w->signum, &sa, 0); |
1563 |
#endif |
1564 |
} |
1565 |
} |
1566 |
|
1567 |
void |
1568 |
ev_signal_stop (EV_P_ struct ev_signal *w) |
1569 |
{ |
1570 |
ev_clear_pending (EV_A_ (W)w); |
1571 |
if (!ev_is_active (w)) |
1572 |
return; |
1573 |
|
1574 |
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1575 |
ev_stop (EV_A_ (W)w); |
1576 |
|
1577 |
if (!signals [w->signum - 1].head) |
1578 |
signal (w->signum, SIG_DFL); |
1579 |
} |
1580 |
|
1581 |
void |
1582 |
ev_child_start (EV_P_ struct ev_child *w) |
1583 |
{ |
1584 |
#if EV_MULTIPLICITY |
1585 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
1586 |
#endif |
1587 |
if (ev_is_active (w)) |
1588 |
return; |
1589 |
|
1590 |
ev_start (EV_A_ (W)w, 1); |
1591 |
wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1592 |
} |
1593 |
|
1594 |
void |
1595 |
ev_child_stop (EV_P_ struct ev_child *w) |
1596 |
{ |
1597 |
ev_clear_pending (EV_A_ (W)w); |
1598 |
if (!ev_is_active (w)) |
1599 |
return; |
1600 |
|
1601 |
wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1602 |
ev_stop (EV_A_ (W)w); |
1603 |
} |
1604 |
|
1605 |
/*****************************************************************************/ |
1606 |
|
1607 |
struct ev_once |
1608 |
{ |
1609 |
struct ev_io io; |
1610 |
struct ev_timer to; |
1611 |
void (*cb)(int revents, void *arg); |
1612 |
void *arg; |
1613 |
}; |
1614 |
|
1615 |
static void |
1616 |
once_cb (EV_P_ struct ev_once *once, int revents) |
1617 |
{ |
1618 |
void (*cb)(int revents, void *arg) = once->cb; |
1619 |
void *arg = once->arg; |
1620 |
|
1621 |
ev_io_stop (EV_A_ &once->io); |
1622 |
ev_timer_stop (EV_A_ &once->to); |
1623 |
ev_free (once); |
1624 |
|
1625 |
cb (revents, arg); |
1626 |
} |
1627 |
|
1628 |
static void |
1629 |
once_cb_io (EV_P_ struct ev_io *w, int revents) |
1630 |
{ |
1631 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
1632 |
} |
1633 |
|
1634 |
static void |
1635 |
once_cb_to (EV_P_ struct ev_timer *w, int revents) |
1636 |
{ |
1637 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
1638 |
} |
1639 |
|
1640 |
void |
1641 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1642 |
{ |
1643 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
1644 |
|
1645 |
if (!once) |
1646 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
1647 |
else |
1648 |
{ |
1649 |
once->cb = cb; |
1650 |
once->arg = arg; |
1651 |
|
1652 |
ev_init (&once->io, once_cb_io); |
1653 |
if (fd >= 0) |
1654 |
{ |
1655 |
ev_io_set (&once->io, fd, events); |
1656 |
ev_io_start (EV_A_ &once->io); |
1657 |
} |
1658 |
|
1659 |
ev_init (&once->to, once_cb_to); |
1660 |
if (timeout >= 0.) |
1661 |
{ |
1662 |
ev_timer_set (&once->to, timeout, 0.); |
1663 |
ev_timer_start (EV_A_ &once->to); |
1664 |
} |
1665 |
} |
1666 |
} |
1667 |
|
1668 |
#ifdef __cplusplus |
1669 |
} |
1670 |
#endif |
1671 |
|