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1151 lines
23 KiB
1151 lines
23 KiB
/* |
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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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#if EV_USE_CONFIG_H |
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# include "config.h" |
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#endif |
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#include <math.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <stddef.h> |
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#include <stdio.h> |
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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 <sys/wait.h> |
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#include <sys/time.h> |
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#include <time.h> |
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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 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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#ifndef EV_USE_SELECT |
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# define EV_USE_SELECT 1 |
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#endif |
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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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#ifndef CLOCK_REALTIME |
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# define EV_USE_REALTIME 0 |
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#endif |
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#ifndef EV_USE_REALTIME |
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# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ |
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#endif |
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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 detetc 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 (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ |
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#include "ev.h" |
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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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static ev_tstamp now, diff; /* monotonic clock */ |
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ev_tstamp ev_now; |
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int ev_method; |
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static int have_monotonic; /* runtime */ |
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static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
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static void (*method_modify)(int fd, int oev, int nev); |
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static void (*method_poll)(ev_tstamp timeout); |
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/*****************************************************************************/ |
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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); |
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return tv.tv_sec + tv.tv_usec * 1e-6; |
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#endif |
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} |
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static 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 (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; |
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} |
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#endif |
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return ev_time (); |
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} |
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#define array_roundsize(base,n) ((n) | 4 & ~3) |
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#define array_needsize(base,cur,cnt,init) \ |
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if ((cnt) > cur) \ |
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{ \ |
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int newcnt = cur; \ |
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do \ |
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{ \ |
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newcnt = array_roundsize (base, newcnt << 1); \ |
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} \ |
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while ((cnt) > newcnt); \ |
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\ |
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base = realloc (base, sizeof (*base) * (newcnt)); \ |
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init (base + cur, newcnt - cur); \ |
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cur = newcnt; \ |
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} |
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/*****************************************************************************/ |
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typedef struct |
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{ |
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struct ev_io *head; |
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unsigned char events; |
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unsigned char reify; |
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} ANFD; |
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static ANFD *anfds; |
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static int anfdmax; |
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static void |
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anfds_init (ANFD *base, int count) |
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{ |
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while (count--) |
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{ |
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base->head = 0; |
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base->events = EV_NONE; |
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base->reify = 0; |
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++base; |
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} |
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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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static ANPENDING *pendings; |
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static int pendingmax, pendingcnt; |
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static void |
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event (W w, int events) |
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{ |
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if (w->pending) |
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{ |
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pendings [w->pending - 1].events |= events; |
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return; |
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} |
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w->pending = ++pendingcnt; |
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array_needsize (pendings, pendingmax, pendingcnt, ); |
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pendings [pendingcnt - 1].w = w; |
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pendings [pendingcnt - 1].events = events; |
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} |
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static void |
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queue_events (W *events, int eventcnt, int type) |
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{ |
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int i; |
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for (i = 0; i < eventcnt; ++i) |
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event (events [i], type); |
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} |
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static void |
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fd_event (int fd, int events) |
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{ |
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ANFD *anfd = anfds + fd; |
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struct ev_io *w; |
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for (w = anfd->head; w; w = w->next) |
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{ |
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int ev = w->events & events; |
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if (ev) |
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event ((W)w, ev); |
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} |
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} |
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/*****************************************************************************/ |
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static int *fdchanges; |
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static int fdchangemax, fdchangecnt; |
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static void |
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fd_reify (void) |
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{ |
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int i; |
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for (i = 0; i < fdchangecnt; ++i) |
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{ |
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int fd = fdchanges [i]; |
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ANFD *anfd = anfds + fd; |
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struct ev_io *w; |
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int events = 0; |
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for (w = anfd->head; w; w = w->next) |
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events |= w->events; |
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anfd->reify = 0; |
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if (anfd->events != events) |
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{ |
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method_modify (fd, anfd->events, events); |
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anfd->events = events; |
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} |
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} |
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fdchangecnt = 0; |
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} |
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static void |
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fd_change (int fd) |
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{ |
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if (anfds [fd].reify || fdchangecnt < 0) |
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return; |
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anfds [fd].reify = 1; |
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++fdchangecnt; |
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array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
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fdchanges [fdchangecnt - 1] = fd; |
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} |
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/* called on EBADF to verify fds */ |
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static void |
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fd_recheck (void) |
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{ |
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int fd; |
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for (fd = 0; fd < anfdmax; ++fd) |
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if (anfds [fd].events) |
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if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
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while (anfds [fd].head) |
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{ |
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ev_io_stop (anfds [fd].head); |
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event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); |
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} |
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} |
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/*****************************************************************************/ |
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static struct ev_timer **timers; |
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static int timermax, timercnt; |
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static struct ev_periodic **periodics; |
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static int periodicmax, periodiccnt; |
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static void |
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upheap (WT *timers, int k) |
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{ |
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WT w = timers [k]; |
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while (k && timers [k >> 1]->at > w->at) |
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{ |
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timers [k] = timers [k >> 1]; |
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timers [k]->active = k + 1; |
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k >>= 1; |
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} |
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timers [k] = w; |
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timers [k]->active = k + 1; |
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} |
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static void |
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downheap (WT *timers, int N, int k) |
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{ |
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WT w = timers [k]; |
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while (k < (N >> 1)) |
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{ |
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int j = k << 1; |
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if (j + 1 < N && timers [j]->at > timers [j + 1]->at) |
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++j; |
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if (w->at <= timers [j]->at) |
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break; |
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timers [k] = timers [j]; |
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timers [k]->active = k + 1; |
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k = j; |
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} |
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timers [k] = w; |
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timers [k]->active = k + 1; |
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} |
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/*****************************************************************************/ |
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typedef struct |
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{ |
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struct ev_signal *head; |
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sig_atomic_t volatile gotsig; |
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} ANSIG; |
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static ANSIG *signals; |
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static int signalmax; |
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static int sigpipe [2]; |
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static sig_atomic_t volatile gotsig; |
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static struct ev_io sigev; |
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static void |
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signals_init (ANSIG *base, int count) |
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{ |
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while (count--) |
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{ |
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base->head = 0; |
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base->gotsig = 0; |
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++base; |
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} |
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} |
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static void |
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sighandler (int signum) |
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{ |
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signals [signum - 1].gotsig = 1; |
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if (!gotsig) |
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{ |
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gotsig = 1; |
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write (sigpipe [1], &signum, 1); |
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} |
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} |
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static void |
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sigcb (struct ev_io *iow, int revents) |
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{ |
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struct ev_signal *w; |
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int signum; |
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read (sigpipe [0], &revents, 1); |
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gotsig = 0; |
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for (signum = signalmax; signum--; ) |
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if (signals [signum].gotsig) |
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{ |
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signals [signum].gotsig = 0; |
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for (w = signals [signum].head; w; w = w->next) |
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event ((W)w, EV_SIGNAL); |
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} |
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} |
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static void |
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siginit (void) |
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{ |
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fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
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fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
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/* rather than sort out wether we really need nb, set it */ |
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fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
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fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
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ev_io_set (&sigev, sigpipe [0], EV_READ); |
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ev_io_start (&sigev); |
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} |
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/*****************************************************************************/ |
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static struct ev_idle **idles; |
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static int idlemax, idlecnt; |
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static struct ev_prepare **prepares; |
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static int preparemax, preparecnt; |
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static struct ev_check **checks; |
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static int checkmax, checkcnt; |
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/*****************************************************************************/ |
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static struct ev_child *childs [PID_HASHSIZE]; |
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static struct ev_signal childev; |
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#ifndef WCONTINUED |
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# define WCONTINUED 0 |
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#endif |
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static void |
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childcb (struct ev_signal *sw, int revents) |
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{ |
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struct ev_child *w; |
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int pid, status; |
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while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
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for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
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if (w->pid == pid || !w->pid) |
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{ |
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w->status = status; |
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event ((W)w, EV_CHILD); |
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} |
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} |
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/*****************************************************************************/ |
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#if EV_USE_EPOLL |
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# include "ev_epoll.c" |
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#endif |
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#if EV_USE_SELECT |
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# include "ev_select.c" |
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#endif |
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int |
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ev_version_major (void) |
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{ |
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return EV_VERSION_MAJOR; |
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} |
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int |
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ev_version_minor (void) |
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{ |
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return EV_VERSION_MINOR; |
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} |
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int ev_init (int flags) |
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{ |
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if (!ev_method) |
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{ |
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#if EV_USE_MONOTONIC |
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{ |
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struct timespec ts; |
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if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
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have_monotonic = 1; |
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} |
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#endif |
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ev_now = ev_time (); |
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now = get_clock (); |
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diff = ev_now - now; |
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|
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if (pipe (sigpipe)) |
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return 0; |
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ev_method = EVMETHOD_NONE; |
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#if EV_USE_EPOLL |
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if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
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#endif |
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#if EV_USE_SELECT |
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if (ev_method == EVMETHOD_NONE) select_init (flags); |
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#endif |
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if (ev_method) |
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{ |
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ev_watcher_init (&sigev, sigcb); |
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siginit (); |
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ev_signal_init (&childev, childcb, SIGCHLD); |
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ev_signal_start (&childev); |
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} |
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} |
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return ev_method; |
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} |
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/*****************************************************************************/ |
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void |
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ev_fork_prepare (void) |
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{ |
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/* nop */ |
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} |
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void |
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ev_fork_parent (void) |
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{ |
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/* nop */ |
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} |
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void |
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ev_fork_child (void) |
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{ |
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#if EV_USE_EPOLL |
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if (ev_method == EVMETHOD_EPOLL) |
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epoll_postfork_child (); |
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#endif |
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ev_io_stop (&sigev); |
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close (sigpipe [0]); |
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close (sigpipe [1]); |
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pipe (sigpipe); |
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siginit (); |
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} |
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/*****************************************************************************/ |
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|
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static void |
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call_pending (void) |
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{ |
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while (pendingcnt) |
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{ |
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ANPENDING *p = pendings + --pendingcnt; |
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|
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if (p->w) |
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{ |
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p->w->pending = 0; |
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p->w->cb (p->w, p->events); |
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} |
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} |
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} |
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|
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static void |
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timers_reify (void) |
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{ |
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while (timercnt && timers [0]->at <= now) |
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{ |
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struct ev_timer *w = timers [0]; |
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|
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/* first reschedule or stop timer */ |
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if (w->repeat) |
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{ |
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assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
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w->at = now + w->repeat; |
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downheap ((WT *)timers, timercnt, 0); |
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} |
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else |
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ev_timer_stop (w); /* nonrepeating: stop timer */ |
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|
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event ((W)w, EV_TIMEOUT); |
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} |
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} |
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|
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static void |
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periodics_reify (void) |
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{ |
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while (periodiccnt && periodics [0]->at <= ev_now) |
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{ |
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struct ev_periodic *w = periodics [0]; |
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|
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/* first reschedule or stop timer */ |
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if (w->interval) |
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{ |
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w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
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assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); |
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downheap ((WT *)periodics, periodiccnt, 0); |
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} |
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else |
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ev_periodic_stop (w); /* nonrepeating: stop timer */ |
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|
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event ((W)w, EV_PERIODIC); |
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} |
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} |
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|
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static void |
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periodics_reschedule (ev_tstamp diff) |
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{ |
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int i; |
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|
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/* adjust periodics after time jump */ |
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for (i = 0; i < periodiccnt; ++i) |
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{ |
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struct ev_periodic *w = periodics [i]; |
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|
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if (w->interval) |
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{ |
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ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
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|
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if (fabs (diff) >= 1e-4) |
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{ |
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ev_periodic_stop (w); |
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ev_periodic_start (w); |
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|
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i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
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} |
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} |
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} |
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} |
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|
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static void |
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time_update (void) |
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{ |
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int i; |
|
|
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ev_now = ev_time (); |
|
|
|
if (have_monotonic) |
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{ |
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ev_tstamp odiff = diff; |
|
|
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for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
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{ |
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now = get_clock (); |
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diff = ev_now - now; |
|
|
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if (fabs (odiff - diff) < MIN_TIMEJUMP) |
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return; /* all is well */ |
|
|
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ev_now = ev_time (); |
|
} |
|
|
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periodics_reschedule (diff - odiff); |
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/* no timer adjustment, as the monotonic clock doesn't jump */ |
|
} |
|
else |
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{ |
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if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
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{ |
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periodics_reschedule (ev_now - now); |
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|
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/* adjust timers. this is easy, as the offset is the same for all */ |
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for (i = 0; i < timercnt; ++i) |
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timers [i]->at += diff; |
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} |
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|
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now = ev_now; |
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} |
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} |
|
|
|
int ev_loop_done; |
|
|
|
void ev_loop (int flags) |
|
{ |
|
double block; |
|
ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
|
|
|
do |
|
{ |
|
/* queue check watchers (and execute them) */ |
|
if (preparecnt) |
|
{ |
|
queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
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call_pending (); |
|
} |
|
|
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/* update fd-related kernel structures */ |
|
fd_reify (); |
|
|
|
/* calculate blocking time */ |
|
|
|
/* we only need this for !monotonic clockor timers, but as we basically |
|
always have timers, we just calculate it always */ |
|
ev_now = ev_time (); |
|
|
|
if (flags & EVLOOP_NONBLOCK || idlecnt) |
|
block = 0.; |
|
else |
|
{ |
|
block = MAX_BLOCKTIME; |
|
|
|
if (timercnt) |
|
{ |
|
ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
|
if (block > to) block = to; |
|
} |
|
|
|
if (periodiccnt) |
|
{ |
|
ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
|
if (block > to) block = to; |
|
} |
|
|
|
if (block < 0.) block = 0.; |
|
} |
|
|
|
method_poll (block); |
|
|
|
/* update ev_now, do magic */ |
|
time_update (); |
|
|
|
/* queue pending timers and reschedule them */ |
|
timers_reify (); /* relative timers called last */ |
|
periodics_reify (); /* absolute timers called first */ |
|
|
|
/* queue idle watchers unless io or timers are pending */ |
|
if (!pendingcnt) |
|
queue_events ((W *)idles, idlecnt, EV_IDLE); |
|
|
|
/* queue check watchers, to be executed first */ |
|
if (checkcnt) |
|
queue_events ((W *)checks, checkcnt, EV_CHECK); |
|
|
|
call_pending (); |
|
} |
|
while (!ev_loop_done); |
|
|
|
if (ev_loop_done != 2) |
|
ev_loop_done = 0; |
|
} |
|
|
|
/*****************************************************************************/ |
|
|
|
static void |
|
wlist_add (WL *head, WL elem) |
|
{ |
|
elem->next = *head; |
|
*head = elem; |
|
} |
|
|
|
static void |
|
wlist_del (WL *head, WL elem) |
|
{ |
|
while (*head) |
|
{ |
|
if (*head == elem) |
|
{ |
|
*head = elem->next; |
|
return; |
|
} |
|
|
|
head = &(*head)->next; |
|
} |
|
} |
|
|
|
static void |
|
ev_clear_pending (W w) |
|
{ |
|
if (w->pending) |
|
{ |
|
pendings [w->pending - 1].w = 0; |
|
w->pending = 0; |
|
} |
|
} |
|
|
|
static void |
|
ev_start (W w, int active) |
|
{ |
|
w->active = active; |
|
} |
|
|
|
static void |
|
ev_stop (W w) |
|
{ |
|
w->active = 0; |
|
} |
|
|
|
/*****************************************************************************/ |
|
|
|
void |
|
ev_io_start (struct ev_io *w) |
|
{ |
|
int fd = w->fd; |
|
|
|
if (ev_is_active (w)) |
|
return; |
|
|
|
assert (("ev_io_start called with negative fd", fd >= 0)); |
|
|
|
ev_start ((W)w, 1); |
|
array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
|
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
|
|
|
fd_change (fd); |
|
} |
|
|
|
void |
|
ev_io_stop (struct ev_io *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (!ev_is_active (w)) |
|
return; |
|
|
|
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
|
ev_stop ((W)w); |
|
|
|
fd_change (w->fd); |
|
} |
|
|
|
void |
|
ev_timer_start (struct ev_timer *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
w->at += now; |
|
|
|
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
|
|
|
ev_start ((W)w, ++timercnt); |
|
array_needsize (timers, timermax, timercnt, ); |
|
timers [timercnt - 1] = w; |
|
upheap ((WT *)timers, timercnt - 1); |
|
} |
|
|
|
void |
|
ev_timer_stop (struct ev_timer *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (!ev_is_active (w)) |
|
return; |
|
|
|
if (w->active < timercnt--) |
|
{ |
|
timers [w->active - 1] = timers [timercnt]; |
|
downheap ((WT *)timers, timercnt, w->active - 1); |
|
} |
|
|
|
w->at = w->repeat; |
|
|
|
ev_stop ((W)w); |
|
} |
|
|
|
void |
|
ev_timer_again (struct ev_timer *w) |
|
{ |
|
if (ev_is_active (w)) |
|
{ |
|
if (w->repeat) |
|
{ |
|
w->at = now + w->repeat; |
|
downheap ((WT *)timers, timercnt, w->active - 1); |
|
} |
|
else |
|
ev_timer_stop (w); |
|
} |
|
else if (w->repeat) |
|
ev_timer_start (w); |
|
} |
|
|
|
void |
|
ev_periodic_start (struct ev_periodic *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
|
|
|
/* this formula differs from the one in periodic_reify because we do not always round up */ |
|
if (w->interval) |
|
w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
|
|
|
ev_start ((W)w, ++periodiccnt); |
|
array_needsize (periodics, periodicmax, periodiccnt, ); |
|
periodics [periodiccnt - 1] = w; |
|
upheap ((WT *)periodics, periodiccnt - 1); |
|
} |
|
|
|
void |
|
ev_periodic_stop (struct ev_periodic *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (!ev_is_active (w)) |
|
return; |
|
|
|
if (w->active < periodiccnt--) |
|
{ |
|
periodics [w->active - 1] = periodics [periodiccnt]; |
|
downheap ((WT *)periodics, periodiccnt, w->active - 1); |
|
} |
|
|
|
ev_stop ((W)w); |
|
} |
|
|
|
void |
|
ev_signal_start (struct ev_signal *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
|
|
|
ev_start ((W)w, 1); |
|
array_needsize (signals, signalmax, w->signum, signals_init); |
|
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
|
|
|
if (!w->next) |
|
{ |
|
struct sigaction sa; |
|
sa.sa_handler = sighandler; |
|
sigfillset (&sa.sa_mask); |
|
sa.sa_flags = 0; |
|
sigaction (w->signum, &sa, 0); |
|
} |
|
} |
|
|
|
void |
|
ev_signal_stop (struct ev_signal *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (!ev_is_active (w)) |
|
return; |
|
|
|
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
|
ev_stop ((W)w); |
|
|
|
if (!signals [w->signum - 1].head) |
|
signal (w->signum, SIG_DFL); |
|
} |
|
|
|
void |
|
ev_idle_start (struct ev_idle *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
ev_start ((W)w, ++idlecnt); |
|
array_needsize (idles, idlemax, idlecnt, ); |
|
idles [idlecnt - 1] = w; |
|
} |
|
|
|
void |
|
ev_idle_stop (struct ev_idle *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
idles [w->active - 1] = idles [--idlecnt]; |
|
ev_stop ((W)w); |
|
} |
|
|
|
void |
|
ev_prepare_start (struct ev_prepare *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
ev_start ((W)w, ++preparecnt); |
|
array_needsize (prepares, preparemax, preparecnt, ); |
|
prepares [preparecnt - 1] = w; |
|
} |
|
|
|
void |
|
ev_prepare_stop (struct ev_prepare *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
prepares [w->active - 1] = prepares [--preparecnt]; |
|
ev_stop ((W)w); |
|
} |
|
|
|
void |
|
ev_check_start (struct ev_check *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
ev_start ((W)w, ++checkcnt); |
|
array_needsize (checks, checkmax, checkcnt, ); |
|
checks [checkcnt - 1] = w; |
|
} |
|
|
|
void |
|
ev_check_stop (struct ev_check *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
checks [w->active - 1] = checks [--checkcnt]; |
|
ev_stop ((W)w); |
|
} |
|
|
|
void |
|
ev_child_start (struct ev_child *w) |
|
{ |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
ev_start ((W)w, 1); |
|
wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
} |
|
|
|
void |
|
ev_child_stop (struct ev_child *w) |
|
{ |
|
ev_clear_pending ((W)w); |
|
if (ev_is_active (w)) |
|
return; |
|
|
|
wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
|
ev_stop ((W)w); |
|
} |
|
|
|
/*****************************************************************************/ |
|
|
|
struct ev_once |
|
{ |
|
struct ev_io io; |
|
struct ev_timer to; |
|
void (*cb)(int revents, void *arg); |
|
void *arg; |
|
}; |
|
|
|
static void |
|
once_cb (struct ev_once *once, int revents) |
|
{ |
|
void (*cb)(int revents, void *arg) = once->cb; |
|
void *arg = once->arg; |
|
|
|
ev_io_stop (&once->io); |
|
ev_timer_stop (&once->to); |
|
free (once); |
|
|
|
cb (revents, arg); |
|
} |
|
|
|
static void |
|
once_cb_io (struct ev_io *w, int revents) |
|
{ |
|
once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
|
} |
|
|
|
static void |
|
once_cb_to (struct ev_timer *w, int revents) |
|
{ |
|
once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
|
} |
|
|
|
void |
|
ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
{ |
|
struct ev_once *once = malloc (sizeof (struct ev_once)); |
|
|
|
if (!once) |
|
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
|
else |
|
{ |
|
once->cb = cb; |
|
once->arg = arg; |
|
|
|
ev_watcher_init (&once->io, once_cb_io); |
|
if (fd >= 0) |
|
{ |
|
ev_io_set (&once->io, fd, events); |
|
ev_io_start (&once->io); |
|
} |
|
|
|
ev_watcher_init (&once->to, once_cb_to); |
|
if (timeout >= 0.) |
|
{ |
|
ev_timer_set (&once->to, timeout, 0.); |
|
ev_timer_start (&once->to); |
|
} |
|
} |
|
} |
|
|
|
/*****************************************************************************/ |
|
|
|
#if 0 |
|
|
|
struct ev_io wio; |
|
|
|
static void |
|
sin_cb (struct ev_io *w, int revents) |
|
{ |
|
fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
|
} |
|
|
|
static void |
|
ocb (struct ev_timer *w, int revents) |
|
{ |
|
//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
|
ev_timer_stop (w); |
|
ev_timer_start (w); |
|
} |
|
|
|
static void |
|
scb (struct ev_signal *w, int revents) |
|
{ |
|
fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
ev_io_stop (&wio); |
|
ev_io_start (&wio); |
|
} |
|
|
|
static void |
|
gcb (struct ev_signal *w, int revents) |
|
{ |
|
fprintf (stderr, "generic %x\n", revents); |
|
|
|
} |
|
|
|
int main (void) |
|
{ |
|
ev_init (0); |
|
|
|
ev_io_init (&wio, sin_cb, 0, EV_READ); |
|
ev_io_start (&wio); |
|
|
|
struct ev_timer t[10000]; |
|
|
|
#if 0 |
|
int i; |
|
for (i = 0; i < 10000; ++i) |
|
{ |
|
struct ev_timer *w = t + i; |
|
ev_watcher_init (w, ocb, i); |
|
ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); |
|
ev_timer_start (w); |
|
if (drand48 () < 0.5) |
|
ev_timer_stop (w); |
|
} |
|
#endif |
|
|
|
struct ev_timer t1; |
|
ev_timer_init (&t1, ocb, 5, 10); |
|
ev_timer_start (&t1); |
|
|
|
struct ev_signal sig; |
|
ev_signal_init (&sig, scb, SIGQUIT); |
|
ev_signal_start (&sig); |
|
|
|
struct ev_check cw; |
|
ev_check_init (&cw, gcb); |
|
ev_check_start (&cw); |
|
|
|
struct ev_idle iw; |
|
ev_idle_init (&iw, gcb); |
|
ev_idle_start (&iw); |
|
|
|
ev_loop (0); |
|
|
|
return 0; |
|
} |
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
|