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1 | /* |
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2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are |
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7 | * met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * * Redistributions in binary form must reproduce the above |
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13 | * copyright notice, this list of conditions and the following |
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14 | * disclaimer in the documentation and/or other materials provided |
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15 | * with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |
1 | #include <math.h> |
30 | #include <math.h> |
2 | #include <stdlib.h> |
31 | #include <stdlib.h> |
3 | #include <unistd.h> |
32 | #include <unistd.h> |
4 | #include <fcntl.h> |
33 | #include <fcntl.h> |
5 | #include <signal.h> |
34 | #include <signal.h> |
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35 | #include <stddef.h> |
6 | |
36 | |
7 | #include <stdio.h> |
37 | #include <stdio.h> |
8 | |
38 | |
9 | #include <assert.h> |
39 | #include <assert.h> |
10 | #include <errno.h> |
40 | #include <errno.h> |
… | |
… | |
83 | |
113 | |
84 | #define array_needsize(base,cur,cnt,init) \ |
114 | #define array_needsize(base,cur,cnt,init) \ |
85 | if ((cnt) > cur) \ |
115 | if ((cnt) > cur) \ |
86 | { \ |
116 | { \ |
87 | int newcnt = cur ? cur << 1 : 16; \ |
117 | int newcnt = cur ? cur << 1 : 16; \ |
88 | fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ |
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89 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
118 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
90 | init (base + cur, newcnt - cur); \ |
119 | init (base + cur, newcnt - cur); \ |
91 | cur = newcnt; \ |
120 | cur = newcnt; \ |
92 | } |
121 | } |
93 | |
122 | |
… | |
… | |
126 | static int pendingmax, pendingcnt; |
155 | static int pendingmax, pendingcnt; |
127 | |
156 | |
128 | static void |
157 | static void |
129 | event (W w, int events) |
158 | event (W w, int events) |
130 | { |
159 | { |
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160 | if (w->active) |
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161 | { |
131 | w->pending = ++pendingcnt; |
162 | w->pending = ++pendingcnt; |
132 | array_needsize (pendings, pendingmax, pendingcnt, ); |
163 | array_needsize (pendings, pendingmax, pendingcnt, ); |
133 | pendings [pendingcnt - 1].w = w; |
164 | pendings [pendingcnt - 1].w = w; |
134 | pendings [pendingcnt - 1].events = events; |
165 | pendings [pendingcnt - 1].events = events; |
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166 | } |
135 | } |
167 | } |
136 | |
168 | |
137 | static void |
169 | static void |
138 | fd_event (int fd, int events) |
170 | fd_event (int fd, int events) |
139 | { |
171 | { |
… | |
… | |
384 | } |
416 | } |
385 | |
417 | |
386 | static void |
418 | static void |
387 | call_pending () |
419 | call_pending () |
388 | { |
420 | { |
389 | int i; |
421 | while (pendingcnt) |
390 | |
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391 | for (i = 0; i < pendingcnt; ++i) |
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392 | { |
422 | { |
393 | ANPENDING *p = pendings + i; |
423 | ANPENDING *p = pendings + --pendingcnt; |
394 | |
424 | |
395 | if (p->w) |
425 | if (p->w) |
396 | { |
426 | { |
397 | p->w->pending = 0; |
427 | p->w->pending = 0; |
398 | p->w->cb (p->w, p->events); |
428 | p->w->cb (p->w, p->events); |
399 | } |
429 | } |
400 | } |
430 | } |
401 | |
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402 | pendingcnt = 0; |
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403 | } |
431 | } |
404 | |
432 | |
405 | static void |
433 | static void |
406 | timers_reify () |
434 | timers_reify () |
407 | { |
435 | { |
408 | while (timercnt && timers [0]->at <= now) |
436 | while (timercnt && timers [0]->at <= now) |
409 | { |
437 | { |
410 | struct ev_timer *w = timers [0]; |
438 | struct ev_timer *w = timers [0]; |
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439 | |
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440 | event ((W)w, EV_TIMEOUT); |
411 | |
441 | |
412 | /* first reschedule or stop timer */ |
442 | /* first reschedule or stop timer */ |
413 | if (w->repeat) |
443 | if (w->repeat) |
414 | { |
444 | { |
415 | w->at = now + w->repeat; |
445 | w->at = now + w->repeat; |
416 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
446 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
417 | downheap ((WT *)timers, timercnt, 0); |
447 | downheap ((WT *)timers, timercnt, 0); |
418 | } |
448 | } |
419 | else |
449 | else |
420 | evtimer_stop (w); /* nonrepeating: stop timer */ |
450 | evtimer_stop (w); /* nonrepeating: stop timer */ |
421 | |
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422 | event ((W)w, EV_TIMEOUT); |
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423 | } |
451 | } |
424 | } |
452 | } |
425 | |
453 | |
426 | static void |
454 | static void |
427 | periodics_reify () |
455 | periodics_reify () |
… | |
… | |
538 | { |
566 | { |
539 | block = MAX_BLOCKTIME; |
567 | block = MAX_BLOCKTIME; |
540 | |
568 | |
541 | if (timercnt) |
569 | if (timercnt) |
542 | { |
570 | { |
543 | ev_tstamp to = timers [0]->at - get_clock () + method_fudge; |
571 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
544 | if (block > to) block = to; |
572 | if (block > to) block = to; |
545 | } |
573 | } |
546 | |
574 | |
547 | if (periodiccnt) |
575 | if (periodiccnt) |
548 | { |
576 | { |
… | |
… | |
600 | head = &(*head)->next; |
628 | head = &(*head)->next; |
601 | } |
629 | } |
602 | } |
630 | } |
603 | |
631 | |
604 | static void |
632 | static void |
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633 | ev_clear (W w) |
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634 | { |
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635 | if (w->pending) |
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636 | { |
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637 | pendings [w->pending - 1].w = 0; |
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638 | w->pending = 0; |
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639 | } |
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640 | } |
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641 | |
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642 | static void |
605 | ev_start (W w, int active) |
643 | ev_start (W w, int active) |
606 | { |
644 | { |
607 | w->pending = 0; |
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608 | w->active = active; |
645 | w->active = active; |
609 | } |
646 | } |
610 | |
647 | |
611 | static void |
648 | static void |
612 | ev_stop (W w) |
649 | ev_stop (W w) |
613 | { |
650 | { |
614 | if (w->pending) |
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615 | pendings [w->pending - 1].w = 0; |
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616 | |
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617 | w->active = 0; |
651 | w->active = 0; |
618 | } |
652 | } |
619 | |
653 | |
620 | /*****************************************************************************/ |
654 | /*****************************************************************************/ |
621 | |
655 | |
… | |
… | |
637 | } |
671 | } |
638 | |
672 | |
639 | void |
673 | void |
640 | evio_stop (struct ev_io *w) |
674 | evio_stop (struct ev_io *w) |
641 | { |
675 | { |
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676 | ev_clear ((W)w); |
642 | if (!ev_is_active (w)) |
677 | if (!ev_is_active (w)) |
643 | return; |
678 | return; |
644 | |
679 | |
645 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
680 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
646 | ev_stop ((W)w); |
681 | ev_stop ((W)w); |
647 | |
682 | |
648 | ++fdchangecnt; |
683 | ++fdchangecnt; |
649 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
684 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
650 | fdchanges [fdchangecnt - 1] = w->fd; |
685 | fdchanges [fdchangecnt - 1] = w->fd; |
651 | } |
686 | } |
652 | |
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653 | |
687 | |
654 | void |
688 | void |
655 | evtimer_start (struct ev_timer *w) |
689 | evtimer_start (struct ev_timer *w) |
656 | { |
690 | { |
657 | if (ev_is_active (w)) |
691 | if (ev_is_active (w)) |
… | |
… | |
668 | } |
702 | } |
669 | |
703 | |
670 | void |
704 | void |
671 | evtimer_stop (struct ev_timer *w) |
705 | evtimer_stop (struct ev_timer *w) |
672 | { |
706 | { |
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707 | ev_clear ((W)w); |
673 | if (!ev_is_active (w)) |
708 | if (!ev_is_active (w)) |
674 | return; |
709 | return; |
675 | |
710 | |
676 | if (w->active < timercnt--) |
711 | if (w->active < timercnt--) |
677 | { |
712 | { |
678 | timers [w->active - 1] = timers [timercnt]; |
713 | timers [w->active - 1] = timers [timercnt]; |
679 | downheap ((WT *)timers, timercnt, w->active - 1); |
714 | downheap ((WT *)timers, timercnt, w->active - 1); |
680 | } |
715 | } |
681 | |
716 | |
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717 | w->at = w->repeat; |
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718 | |
682 | ev_stop ((W)w); |
719 | ev_stop ((W)w); |
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720 | } |
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721 | |
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722 | void |
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723 | evtimer_again (struct ev_timer *w) |
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724 | { |
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725 | if (ev_is_active (w)) |
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726 | { |
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727 | if (w->repeat) |
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728 | { |
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729 | w->at = now + w->repeat; |
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730 | downheap ((WT *)timers, timercnt, w->active - 1); |
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731 | } |
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732 | else |
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733 | evtimer_stop (w); |
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734 | } |
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735 | else if (w->repeat) |
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736 | evtimer_start (w); |
683 | } |
737 | } |
684 | |
738 | |
685 | void |
739 | void |
686 | evperiodic_start (struct ev_periodic *w) |
740 | evperiodic_start (struct ev_periodic *w) |
687 | { |
741 | { |
… | |
… | |
701 | } |
755 | } |
702 | |
756 | |
703 | void |
757 | void |
704 | evperiodic_stop (struct ev_periodic *w) |
758 | evperiodic_stop (struct ev_periodic *w) |
705 | { |
759 | { |
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760 | ev_clear ((W)w); |
706 | if (!ev_is_active (w)) |
761 | if (!ev_is_active (w)) |
707 | return; |
762 | return; |
708 | |
763 | |
709 | if (w->active < periodiccnt--) |
764 | if (w->active < periodiccnt--) |
710 | { |
765 | { |
… | |
… | |
736 | } |
791 | } |
737 | |
792 | |
738 | void |
793 | void |
739 | evsignal_stop (struct ev_signal *w) |
794 | evsignal_stop (struct ev_signal *w) |
740 | { |
795 | { |
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796 | ev_clear ((W)w); |
741 | if (!ev_is_active (w)) |
797 | if (!ev_is_active (w)) |
742 | return; |
798 | return; |
743 | |
799 | |
744 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
800 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
745 | ev_stop ((W)w); |
801 | ev_stop ((W)w); |
… | |
… | |
758 | idles [idlecnt - 1] = w; |
814 | idles [idlecnt - 1] = w; |
759 | } |
815 | } |
760 | |
816 | |
761 | void evidle_stop (struct ev_idle *w) |
817 | void evidle_stop (struct ev_idle *w) |
762 | { |
818 | { |
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819 | ev_clear ((W)w); |
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820 | if (ev_is_active (w)) |
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821 | return; |
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822 | |
763 | idles [w->active - 1] = idles [--idlecnt]; |
823 | idles [w->active - 1] = idles [--idlecnt]; |
764 | ev_stop ((W)w); |
824 | ev_stop ((W)w); |
765 | } |
825 | } |
766 | |
826 | |
767 | void evcheck_start (struct ev_check *w) |
827 | void evcheck_start (struct ev_check *w) |
… | |
… | |
774 | checks [checkcnt - 1] = w; |
834 | checks [checkcnt - 1] = w; |
775 | } |
835 | } |
776 | |
836 | |
777 | void evcheck_stop (struct ev_check *w) |
837 | void evcheck_stop (struct ev_check *w) |
778 | { |
838 | { |
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839 | ev_clear ((W)w); |
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840 | if (ev_is_active (w)) |
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841 | return; |
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842 | |
779 | checks [w->active - 1] = checks [--checkcnt]; |
843 | checks [w->active - 1] = checks [--checkcnt]; |
780 | ev_stop ((W)w); |
844 | ev_stop ((W)w); |
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845 | } |
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846 | |
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847 | /*****************************************************************************/ |
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848 | |
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849 | struct ev_once |
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850 | { |
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851 | struct ev_io io; |
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852 | struct ev_timer to; |
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853 | void (*cb)(int revents, void *arg); |
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854 | void *arg; |
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855 | }; |
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856 | |
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857 | static void |
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858 | once_cb (struct ev_once *once, int revents) |
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859 | { |
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860 | void (*cb)(int revents, void *arg) = once->cb; |
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861 | void *arg = once->arg; |
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862 | |
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863 | evio_stop (&once->io); |
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864 | evtimer_stop (&once->to); |
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865 | free (once); |
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866 | |
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867 | cb (revents, arg); |
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868 | } |
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869 | |
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870 | static void |
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871 | once_cb_io (struct ev_io *w, int revents) |
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872 | { |
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873 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
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874 | } |
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875 | |
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876 | static void |
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877 | once_cb_to (struct ev_timer *w, int revents) |
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878 | { |
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879 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
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880 | } |
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881 | |
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882 | void |
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883 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
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884 | { |
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885 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
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886 | |
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887 | if (!once) |
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888 | cb (EV_ERROR, arg); |
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889 | else |
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890 | { |
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891 | once->cb = cb; |
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892 | once->arg = arg; |
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893 | |
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894 | evw_init (&once->io, once_cb_io); |
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895 | |
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896 | if (fd >= 0) |
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897 | { |
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898 | evio_set (&once->io, fd, events); |
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899 | evio_start (&once->io); |
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900 | } |
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901 | |
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902 | evw_init (&once->to, once_cb_to); |
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903 | |
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904 | if (timeout >= 0.) |
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905 | { |
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906 | evtimer_set (&once->to, timeout, 0.); |
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907 | evtimer_start (&once->to); |
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908 | } |
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909 | } |
781 | } |
910 | } |
782 | |
911 | |
783 | /*****************************************************************************/ |
912 | /*****************************************************************************/ |
784 | |
913 | |
785 | #if 0 |
914 | #if 0 |