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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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#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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|
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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 <sys/wait.h> |
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#include <sys/time.h> |
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#include <time.h> |
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|
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#ifndef HAVE_MONOTONIC |
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# ifdef CLOCK_MONOTONIC |
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# define HAVE_MONOTONIC 1 |
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# endif |
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#endif |
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|
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#ifndef HAVE_SELECT |
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# define HAVE_SELECT 1 |
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#endif |
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|
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#ifndef HAVE_EPOLL |
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# define HAVE_EPOLL 0 |
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#endif |
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|
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#ifndef HAVE_REALTIME |
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# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
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#endif |
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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 60. |
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#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ |
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|
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#include "ev.h" |
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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 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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|
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static int have_monotonic; /* runtime */ |
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|
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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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/*****************************************************************************/ |
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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 HAVE_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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|
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static ev_tstamp |
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get_clock (void) |
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{ |
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#if HAVE_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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|
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return ev_time (); |
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} |
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|
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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 = (newcnt << 1) | 4 & ~3; \ |
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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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/*****************************************************************************/ |
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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 wev, rev; /* want, received event set */ |
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} ANFD; |
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|
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static ANFD *anfds; |
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static int anfdmax; |
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|
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static int *fdchanges; |
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static int fdchangemax, fdchangecnt; |
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|
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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->wev = base->rev = EV_NONE; |
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++base; |
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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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W w; |
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int events; |
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} ANPENDING; |
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|
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static ANPENDING *pendings; |
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static int pendingmax, pendingcnt; |
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|
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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->active) |
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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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} |
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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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|
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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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|
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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 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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|
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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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|
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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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|
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for (fd = 0; fd < anfdmax; ++fd) |
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if (anfds [fd].wev) |
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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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event ((W)anfds [fd].head, EV_ERROR); |
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evio_stop (anfds [fd].head); |
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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 struct ev_timer **timers; |
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static int timermax, timercnt; |
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|
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static struct ev_periodic **periodics; |
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static int periodicmax, periodiccnt; |
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|
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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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|
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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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|
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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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|
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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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|
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while (k < (N >> 1)) |
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{ |
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int j = k << 1; |
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|
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if (j + 1 < N && timers [j]->at > timers [j + 1]->at) |
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++j; |
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|
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if (w->at <= timers [j]->at) |
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break; |
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|
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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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|
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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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/*****************************************************************************/ |
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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 gotsig; |
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} ANSIG; |
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|
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static ANSIG *signals; |
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static int signalmax; |
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|
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static int sigpipe [2]; |
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static sig_atomic_t gotsig; |
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static struct ev_io sigev; |
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|
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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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|
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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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|
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if (!gotsig) |
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{ |
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gotsig = 1; |
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write (sigpipe [1], &gotsig, 1); |
300 |
} |
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} |
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|
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static void |
304 |
sigcb (struct ev_io *iow, int revents) |
305 |
{ |
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struct ev_signal *w; |
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int sig; |
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|
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gotsig = 0; |
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read (sigpipe [0], &revents, 1); |
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|
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for (sig = signalmax; sig--; ) |
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if (signals [sig].gotsig) |
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{ |
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signals [sig].gotsig = 0; |
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|
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for (w = signals [sig].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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|
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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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|
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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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|
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evio_set (&sigev, sigpipe [0], EV_READ); |
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evio_start (&sigev); |
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} |
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|
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/*****************************************************************************/ |
337 |
|
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static struct ev_idle **idles; |
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static int idlemax, idlecnt; |
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|
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static struct ev_prepare **prepares; |
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static int preparemax, preparecnt; |
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|
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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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/*****************************************************************************/ |
348 |
|
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static struct ev_child *childs [PID_HASHSIZE]; |
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static struct ev_signal childev; |
351 |
|
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#ifndef WCONTINUED |
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# define WCONTINUED 0 |
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#endif |
355 |
|
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static void |
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childcb (struct ev_signal *sw, int revents) |
358 |
{ |
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struct ev_child *w; |
360 |
int pid, status; |
361 |
|
362 |
while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
363 |
for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
364 |
if (w->pid == pid || w->pid == -1) |
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{ |
366 |
w->status = status; |
367 |
event ((W)w, EV_CHILD); |
368 |
} |
369 |
} |
370 |
|
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/*****************************************************************************/ |
372 |
|
373 |
#if HAVE_EPOLL |
374 |
# include "ev_epoll.c" |
375 |
#endif |
376 |
#if HAVE_SELECT |
377 |
# include "ev_select.c" |
378 |
#endif |
379 |
|
380 |
int |
381 |
ev_version_major (void) |
382 |
{ |
383 |
return EV_VERSION_MAJOR; |
384 |
} |
385 |
|
386 |
int |
387 |
ev_version_minor (void) |
388 |
{ |
389 |
return EV_VERSION_MINOR; |
390 |
} |
391 |
|
392 |
int ev_init (int flags) |
393 |
{ |
394 |
if (!ev_method) |
395 |
{ |
396 |
#if HAVE_MONOTONIC |
397 |
{ |
398 |
struct timespec ts; |
399 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
400 |
have_monotonic = 1; |
401 |
} |
402 |
#endif |
403 |
|
404 |
ev_now = ev_time (); |
405 |
now = get_clock (); |
406 |
diff = ev_now - now; |
407 |
|
408 |
if (pipe (sigpipe)) |
409 |
return 0; |
410 |
|
411 |
ev_method = EVMETHOD_NONE; |
412 |
#if HAVE_EPOLL |
413 |
if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
414 |
#endif |
415 |
#if HAVE_SELECT |
416 |
if (ev_method == EVMETHOD_NONE) select_init (flags); |
417 |
#endif |
418 |
|
419 |
if (ev_method) |
420 |
{ |
421 |
evw_init (&sigev, sigcb); |
422 |
siginit (); |
423 |
|
424 |
evsignal_init (&childev, childcb, SIGCHLD); |
425 |
evsignal_start (&childev); |
426 |
} |
427 |
} |
428 |
|
429 |
return ev_method; |
430 |
} |
431 |
|
432 |
/*****************************************************************************/ |
433 |
|
434 |
void |
435 |
ev_prefork (void) |
436 |
{ |
437 |
/* nop */ |
438 |
} |
439 |
|
440 |
void |
441 |
ev_postfork_parent (void) |
442 |
{ |
443 |
/* nop */ |
444 |
} |
445 |
|
446 |
void |
447 |
ev_postfork_child (void) |
448 |
{ |
449 |
#if HAVE_EPOLL |
450 |
if (ev_method == EVMETHOD_EPOLL) |
451 |
epoll_postfork_child (); |
452 |
#endif |
453 |
|
454 |
evio_stop (&sigev); |
455 |
close (sigpipe [0]); |
456 |
close (sigpipe [1]); |
457 |
pipe (sigpipe); |
458 |
siginit (); |
459 |
} |
460 |
|
461 |
/*****************************************************************************/ |
462 |
|
463 |
static void |
464 |
fd_reify (void) |
465 |
{ |
466 |
int i; |
467 |
|
468 |
for (i = 0; i < fdchangecnt; ++i) |
469 |
{ |
470 |
int fd = fdchanges [i]; |
471 |
ANFD *anfd = anfds + fd; |
472 |
struct ev_io *w; |
473 |
|
474 |
int wev = 0; |
475 |
|
476 |
for (w = anfd->head; w; w = w->next) |
477 |
wev |= w->events; |
478 |
|
479 |
if (anfd->wev != wev) |
480 |
{ |
481 |
method_modify (fd, anfd->wev, wev); |
482 |
anfd->wev = wev; |
483 |
} |
484 |
} |
485 |
|
486 |
fdchangecnt = 0; |
487 |
} |
488 |
|
489 |
static void |
490 |
call_pending (void) |
491 |
{ |
492 |
while (pendingcnt) |
493 |
{ |
494 |
ANPENDING *p = pendings + --pendingcnt; |
495 |
|
496 |
if (p->w) |
497 |
{ |
498 |
p->w->pending = 0; |
499 |
p->w->cb (p->w, p->events); |
500 |
} |
501 |
} |
502 |
} |
503 |
|
504 |
static void |
505 |
timers_reify (void) |
506 |
{ |
507 |
while (timercnt && timers [0]->at <= now) |
508 |
{ |
509 |
struct ev_timer *w = timers [0]; |
510 |
|
511 |
event ((W)w, EV_TIMEOUT); |
512 |
|
513 |
/* first reschedule or stop timer */ |
514 |
if (w->repeat) |
515 |
{ |
516 |
w->at = now + w->repeat; |
517 |
assert (("timer timeout in the past, negative repeat?", w->at > now)); |
518 |
downheap ((WT *)timers, timercnt, 0); |
519 |
} |
520 |
else |
521 |
evtimer_stop (w); /* nonrepeating: stop timer */ |
522 |
} |
523 |
} |
524 |
|
525 |
static void |
526 |
periodics_reify (void) |
527 |
{ |
528 |
while (periodiccnt && periodics [0]->at <= ev_now) |
529 |
{ |
530 |
struct ev_periodic *w = periodics [0]; |
531 |
|
532 |
/* first reschedule or stop timer */ |
533 |
if (w->interval) |
534 |
{ |
535 |
w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
536 |
assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
537 |
downheap ((WT *)periodics, periodiccnt, 0); |
538 |
} |
539 |
else |
540 |
evperiodic_stop (w); /* nonrepeating: stop timer */ |
541 |
|
542 |
event ((W)w, EV_TIMEOUT); |
543 |
} |
544 |
} |
545 |
|
546 |
static void |
547 |
periodics_reschedule (ev_tstamp diff) |
548 |
{ |
549 |
int i; |
550 |
|
551 |
/* adjust periodics after time jump */ |
552 |
for (i = 0; i < periodiccnt; ++i) |
553 |
{ |
554 |
struct ev_periodic *w = periodics [i]; |
555 |
|
556 |
if (w->interval) |
557 |
{ |
558 |
ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
559 |
|
560 |
if (fabs (diff) >= 1e-4) |
561 |
{ |
562 |
evperiodic_stop (w); |
563 |
evperiodic_start (w); |
564 |
|
565 |
i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
566 |
} |
567 |
} |
568 |
} |
569 |
} |
570 |
|
571 |
static void |
572 |
time_update (void) |
573 |
{ |
574 |
int i; |
575 |
|
576 |
ev_now = ev_time (); |
577 |
|
578 |
if (have_monotonic) |
579 |
{ |
580 |
ev_tstamp odiff = diff; |
581 |
|
582 |
for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
583 |
{ |
584 |
now = get_clock (); |
585 |
diff = ev_now - now; |
586 |
|
587 |
if (fabs (odiff - diff) < MIN_TIMEJUMP) |
588 |
return; /* all is well */ |
589 |
|
590 |
ev_now = ev_time (); |
591 |
} |
592 |
|
593 |
periodics_reschedule (diff - odiff); |
594 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
595 |
} |
596 |
else |
597 |
{ |
598 |
if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
599 |
{ |
600 |
periodics_reschedule (ev_now - now); |
601 |
|
602 |
/* adjust timers. this is easy, as the offset is the same for all */ |
603 |
for (i = 0; i < timercnt; ++i) |
604 |
timers [i]->at += diff; |
605 |
} |
606 |
|
607 |
now = ev_now; |
608 |
} |
609 |
} |
610 |
|
611 |
int ev_loop_done; |
612 |
|
613 |
void ev_loop (int flags) |
614 |
{ |
615 |
double block; |
616 |
ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; |
617 |
|
618 |
do |
619 |
{ |
620 |
/* queue check watchers (and execute them) */ |
621 |
if (preparecnt) |
622 |
{ |
623 |
queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
624 |
call_pending (); |
625 |
} |
626 |
|
627 |
/* update fd-related kernel structures */ |
628 |
fd_reify (); |
629 |
|
630 |
/* calculate blocking time */ |
631 |
|
632 |
/* we only need this for !monotonic clockor timers, but as we basically |
633 |
always have timers, we just calculate it always */ |
634 |
ev_now = ev_time (); |
635 |
|
636 |
if (flags & EVLOOP_NONBLOCK || idlecnt) |
637 |
block = 0.; |
638 |
else |
639 |
{ |
640 |
block = MAX_BLOCKTIME; |
641 |
|
642 |
if (timercnt) |
643 |
{ |
644 |
ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
645 |
if (block > to) block = to; |
646 |
} |
647 |
|
648 |
if (periodiccnt) |
649 |
{ |
650 |
ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
651 |
if (block > to) block = to; |
652 |
} |
653 |
|
654 |
if (block < 0.) block = 0.; |
655 |
} |
656 |
|
657 |
method_poll (block); |
658 |
|
659 |
/* update ev_now, do magic */ |
660 |
time_update (); |
661 |
|
662 |
/* queue pending timers and reschedule them */ |
663 |
timers_reify (); /* relative timers called last */ |
664 |
periodics_reify (); /* absolute timers called first */ |
665 |
|
666 |
/* queue idle watchers unless io or timers are pending */ |
667 |
if (!pendingcnt) |
668 |
queue_events ((W *)idles, idlecnt, EV_IDLE); |
669 |
|
670 |
/* queue check watchers, to be executed first */ |
671 |
if (checkcnt) |
672 |
queue_events ((W *)checks, checkcnt, EV_CHECK); |
673 |
|
674 |
call_pending (); |
675 |
} |
676 |
while (!ev_loop_done); |
677 |
|
678 |
if (ev_loop_done != 2) |
679 |
ev_loop_done = 0; |
680 |
} |
681 |
|
682 |
/*****************************************************************************/ |
683 |
|
684 |
static void |
685 |
wlist_add (WL *head, WL elem) |
686 |
{ |
687 |
elem->next = *head; |
688 |
*head = elem; |
689 |
} |
690 |
|
691 |
static void |
692 |
wlist_del (WL *head, WL elem) |
693 |
{ |
694 |
while (*head) |
695 |
{ |
696 |
if (*head == elem) |
697 |
{ |
698 |
*head = elem->next; |
699 |
return; |
700 |
} |
701 |
|
702 |
head = &(*head)->next; |
703 |
} |
704 |
} |
705 |
|
706 |
static void |
707 |
ev_clear (W w) |
708 |
{ |
709 |
if (w->pending) |
710 |
{ |
711 |
pendings [w->pending - 1].w = 0; |
712 |
w->pending = 0; |
713 |
} |
714 |
} |
715 |
|
716 |
static void |
717 |
ev_start (W w, int active) |
718 |
{ |
719 |
w->active = active; |
720 |
} |
721 |
|
722 |
static void |
723 |
ev_stop (W w) |
724 |
{ |
725 |
w->active = 0; |
726 |
} |
727 |
|
728 |
/*****************************************************************************/ |
729 |
|
730 |
void |
731 |
evio_start (struct ev_io *w) |
732 |
{ |
733 |
if (ev_is_active (w)) |
734 |
return; |
735 |
|
736 |
int fd = w->fd; |
737 |
|
738 |
ev_start ((W)w, 1); |
739 |
array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
740 |
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
741 |
|
742 |
++fdchangecnt; |
743 |
array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
744 |
fdchanges [fdchangecnt - 1] = fd; |
745 |
} |
746 |
|
747 |
void |
748 |
evio_stop (struct ev_io *w) |
749 |
{ |
750 |
ev_clear ((W)w); |
751 |
if (!ev_is_active (w)) |
752 |
return; |
753 |
|
754 |
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
755 |
ev_stop ((W)w); |
756 |
|
757 |
++fdchangecnt; |
758 |
array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
759 |
fdchanges [fdchangecnt - 1] = w->fd; |
760 |
} |
761 |
|
762 |
void |
763 |
evtimer_start (struct ev_timer *w) |
764 |
{ |
765 |
if (ev_is_active (w)) |
766 |
return; |
767 |
|
768 |
w->at += now; |
769 |
|
770 |
assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
771 |
|
772 |
ev_start ((W)w, ++timercnt); |
773 |
array_needsize (timers, timermax, timercnt, ); |
774 |
timers [timercnt - 1] = w; |
775 |
upheap ((WT *)timers, timercnt - 1); |
776 |
} |
777 |
|
778 |
void |
779 |
evtimer_stop (struct ev_timer *w) |
780 |
{ |
781 |
ev_clear ((W)w); |
782 |
if (!ev_is_active (w)) |
783 |
return; |
784 |
|
785 |
if (w->active < timercnt--) |
786 |
{ |
787 |
timers [w->active - 1] = timers [timercnt]; |
788 |
downheap ((WT *)timers, timercnt, w->active - 1); |
789 |
} |
790 |
|
791 |
w->at = w->repeat; |
792 |
|
793 |
ev_stop ((W)w); |
794 |
} |
795 |
|
796 |
void |
797 |
evtimer_again (struct ev_timer *w) |
798 |
{ |
799 |
if (ev_is_active (w)) |
800 |
{ |
801 |
if (w->repeat) |
802 |
{ |
803 |
w->at = now + w->repeat; |
804 |
downheap ((WT *)timers, timercnt, w->active - 1); |
805 |
} |
806 |
else |
807 |
evtimer_stop (w); |
808 |
} |
809 |
else if (w->repeat) |
810 |
evtimer_start (w); |
811 |
} |
812 |
|
813 |
void |
814 |
evperiodic_start (struct ev_periodic *w) |
815 |
{ |
816 |
if (ev_is_active (w)) |
817 |
return; |
818 |
|
819 |
assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
820 |
|
821 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
822 |
if (w->interval) |
823 |
w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
824 |
|
825 |
ev_start ((W)w, ++periodiccnt); |
826 |
array_needsize (periodics, periodicmax, periodiccnt, ); |
827 |
periodics [periodiccnt - 1] = w; |
828 |
upheap ((WT *)periodics, periodiccnt - 1); |
829 |
} |
830 |
|
831 |
void |
832 |
evperiodic_stop (struct ev_periodic *w) |
833 |
{ |
834 |
ev_clear ((W)w); |
835 |
if (!ev_is_active (w)) |
836 |
return; |
837 |
|
838 |
if (w->active < periodiccnt--) |
839 |
{ |
840 |
periodics [w->active - 1] = periodics [periodiccnt]; |
841 |
downheap ((WT *)periodics, periodiccnt, w->active - 1); |
842 |
} |
843 |
|
844 |
ev_stop ((W)w); |
845 |
} |
846 |
|
847 |
void |
848 |
evsignal_start (struct ev_signal *w) |
849 |
{ |
850 |
if (ev_is_active (w)) |
851 |
return; |
852 |
|
853 |
ev_start ((W)w, 1); |
854 |
array_needsize (signals, signalmax, w->signum, signals_init); |
855 |
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
856 |
|
857 |
if (!w->next) |
858 |
{ |
859 |
struct sigaction sa; |
860 |
sa.sa_handler = sighandler; |
861 |
sigfillset (&sa.sa_mask); |
862 |
sa.sa_flags = 0; |
863 |
sigaction (w->signum, &sa, 0); |
864 |
} |
865 |
} |
866 |
|
867 |
void |
868 |
evsignal_stop (struct ev_signal *w) |
869 |
{ |
870 |
ev_clear ((W)w); |
871 |
if (!ev_is_active (w)) |
872 |
return; |
873 |
|
874 |
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
875 |
ev_stop ((W)w); |
876 |
|
877 |
if (!signals [w->signum - 1].head) |
878 |
signal (w->signum, SIG_DFL); |
879 |
} |
880 |
|
881 |
void evidle_start (struct ev_idle *w) |
882 |
{ |
883 |
if (ev_is_active (w)) |
884 |
return; |
885 |
|
886 |
ev_start ((W)w, ++idlecnt); |
887 |
array_needsize (idles, idlemax, idlecnt, ); |
888 |
idles [idlecnt - 1] = w; |
889 |
} |
890 |
|
891 |
void evidle_stop (struct ev_idle *w) |
892 |
{ |
893 |
ev_clear ((W)w); |
894 |
if (ev_is_active (w)) |
895 |
return; |
896 |
|
897 |
idles [w->active - 1] = idles [--idlecnt]; |
898 |
ev_stop ((W)w); |
899 |
} |
900 |
|
901 |
void evprepare_start (struct ev_prepare *w) |
902 |
{ |
903 |
if (ev_is_active (w)) |
904 |
return; |
905 |
|
906 |
ev_start ((W)w, ++preparecnt); |
907 |
array_needsize (prepares, preparemax, preparecnt, ); |
908 |
prepares [preparecnt - 1] = w; |
909 |
} |
910 |
|
911 |
void evprepare_stop (struct ev_prepare *w) |
912 |
{ |
913 |
ev_clear ((W)w); |
914 |
if (ev_is_active (w)) |
915 |
return; |
916 |
|
917 |
prepares [w->active - 1] = prepares [--preparecnt]; |
918 |
ev_stop ((W)w); |
919 |
} |
920 |
|
921 |
void evcheck_start (struct ev_check *w) |
922 |
{ |
923 |
if (ev_is_active (w)) |
924 |
return; |
925 |
|
926 |
ev_start ((W)w, ++checkcnt); |
927 |
array_needsize (checks, checkmax, checkcnt, ); |
928 |
checks [checkcnt - 1] = w; |
929 |
} |
930 |
|
931 |
void evcheck_stop (struct ev_check *w) |
932 |
{ |
933 |
ev_clear ((W)w); |
934 |
if (ev_is_active (w)) |
935 |
return; |
936 |
|
937 |
checks [w->active - 1] = checks [--checkcnt]; |
938 |
ev_stop ((W)w); |
939 |
} |
940 |
|
941 |
void evchild_start (struct ev_child *w) |
942 |
{ |
943 |
if (ev_is_active (w)) |
944 |
return; |
945 |
|
946 |
ev_start ((W)w, 1); |
947 |
wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
948 |
} |
949 |
|
950 |
void evchild_stop (struct ev_child *w) |
951 |
{ |
952 |
ev_clear ((W)w); |
953 |
if (ev_is_active (w)) |
954 |
return; |
955 |
|
956 |
wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
957 |
ev_stop ((W)w); |
958 |
} |
959 |
|
960 |
/*****************************************************************************/ |
961 |
|
962 |
struct ev_once |
963 |
{ |
964 |
struct ev_io io; |
965 |
struct ev_timer to; |
966 |
void (*cb)(int revents, void *arg); |
967 |
void *arg; |
968 |
}; |
969 |
|
970 |
static void |
971 |
once_cb (struct ev_once *once, int revents) |
972 |
{ |
973 |
void (*cb)(int revents, void *arg) = once->cb; |
974 |
void *arg = once->arg; |
975 |
|
976 |
evio_stop (&once->io); |
977 |
evtimer_stop (&once->to); |
978 |
free (once); |
979 |
|
980 |
cb (revents, arg); |
981 |
} |
982 |
|
983 |
static void |
984 |
once_cb_io (struct ev_io *w, int revents) |
985 |
{ |
986 |
once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
987 |
} |
988 |
|
989 |
static void |
990 |
once_cb_to (struct ev_timer *w, int revents) |
991 |
{ |
992 |
once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
993 |
} |
994 |
|
995 |
void |
996 |
ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
997 |
{ |
998 |
struct ev_once *once = malloc (sizeof (struct ev_once)); |
999 |
|
1000 |
if (!once) |
1001 |
cb (EV_ERROR, arg); |
1002 |
else |
1003 |
{ |
1004 |
once->cb = cb; |
1005 |
once->arg = arg; |
1006 |
|
1007 |
evw_init (&once->io, once_cb_io); |
1008 |
|
1009 |
if (fd >= 0) |
1010 |
{ |
1011 |
evio_set (&once->io, fd, events); |
1012 |
evio_start (&once->io); |
1013 |
} |
1014 |
|
1015 |
evw_init (&once->to, once_cb_to); |
1016 |
|
1017 |
if (timeout >= 0.) |
1018 |
{ |
1019 |
evtimer_set (&once->to, timeout, 0.); |
1020 |
evtimer_start (&once->to); |
1021 |
} |
1022 |
} |
1023 |
} |
1024 |
|
1025 |
/*****************************************************************************/ |
1026 |
|
1027 |
#if 0 |
1028 |
|
1029 |
struct ev_io wio; |
1030 |
|
1031 |
static void |
1032 |
sin_cb (struct ev_io *w, int revents) |
1033 |
{ |
1034 |
fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
1035 |
} |
1036 |
|
1037 |
static void |
1038 |
ocb (struct ev_timer *w, int revents) |
1039 |
{ |
1040 |
//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
1041 |
evtimer_stop (w); |
1042 |
evtimer_start (w); |
1043 |
} |
1044 |
|
1045 |
static void |
1046 |
scb (struct ev_signal *w, int revents) |
1047 |
{ |
1048 |
fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
1049 |
evio_stop (&wio); |
1050 |
evio_start (&wio); |
1051 |
} |
1052 |
|
1053 |
static void |
1054 |
gcb (struct ev_signal *w, int revents) |
1055 |
{ |
1056 |
fprintf (stderr, "generic %x\n", revents); |
1057 |
|
1058 |
} |
1059 |
|
1060 |
int main (void) |
1061 |
{ |
1062 |
ev_init (0); |
1063 |
|
1064 |
evio_init (&wio, sin_cb, 0, EV_READ); |
1065 |
evio_start (&wio); |
1066 |
|
1067 |
struct ev_timer t[10000]; |
1068 |
|
1069 |
#if 0 |
1070 |
int i; |
1071 |
for (i = 0; i < 10000; ++i) |
1072 |
{ |
1073 |
struct ev_timer *w = t + i; |
1074 |
evw_init (w, ocb, i); |
1075 |
evtimer_init_abs (w, ocb, drand48 (), 0.99775533); |
1076 |
evtimer_start (w); |
1077 |
if (drand48 () < 0.5) |
1078 |
evtimer_stop (w); |
1079 |
} |
1080 |
#endif |
1081 |
|
1082 |
struct ev_timer t1; |
1083 |
evtimer_init (&t1, ocb, 5, 10); |
1084 |
evtimer_start (&t1); |
1085 |
|
1086 |
struct ev_signal sig; |
1087 |
evsignal_init (&sig, scb, SIGQUIT); |
1088 |
evsignal_start (&sig); |
1089 |
|
1090 |
struct ev_check cw; |
1091 |
evcheck_init (&cw, gcb); |
1092 |
evcheck_start (&cw); |
1093 |
|
1094 |
struct ev_idle iw; |
1095 |
evidle_init (&iw, gcb); |
1096 |
evidle_start (&iw); |
1097 |
|
1098 |
ev_loop (0); |
1099 |
|
1100 |
return 0; |
1101 |
} |
1102 |
|
1103 |
#endif |
1104 |
|
1105 |
|
1106 |
|
1107 |
|