1 | /* |
1 | /* |
2 | * libev event processing core, watcher management |
2 | * libev event processing core, watcher management |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
… | |
… | |
376 | # undef EV_USE_INOTIFY |
376 | # undef EV_USE_INOTIFY |
377 | # define EV_USE_INOTIFY 0 |
377 | # define EV_USE_INOTIFY 0 |
378 | #endif |
378 | #endif |
379 | |
379 | |
380 | #if !EV_USE_NANOSLEEP |
380 | #if !EV_USE_NANOSLEEP |
381 | # ifndef _WIN32 |
381 | /* hp-ux has it in sys/time.h, which we unconditionally include above */ |
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382 | # if !defined(_WIN32) && !defined(__hpux) |
382 | # include <sys/select.h> |
383 | # include <sys/select.h> |
383 | # endif |
384 | # endif |
384 | #endif |
385 | #endif |
385 | |
386 | |
386 | #if EV_USE_INOTIFY |
387 | #if EV_USE_INOTIFY |
… | |
… | |
591 | if (syserr_cb) |
592 | if (syserr_cb) |
592 | syserr_cb (msg); |
593 | syserr_cb (msg); |
593 | else |
594 | else |
594 | { |
595 | { |
595 | #if EV_AVOID_STDIO |
596 | #if EV_AVOID_STDIO |
596 | const char *err = strerror (errno); |
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|
597 | |
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598 | ev_printerr (msg); |
597 | ev_printerr (msg); |
599 | ev_printerr (": "); |
598 | ev_printerr (": "); |
600 | ev_printerr (err); |
599 | ev_printerr (strerror (errno)); |
601 | ev_printerr ("\n"); |
600 | ev_printerr ("\n"); |
602 | #else |
601 | #else |
603 | perror (msg); |
602 | perror (msg); |
604 | #endif |
603 | #endif |
605 | abort (); |
604 | abort (); |
… | |
… | |
639 | ptr = alloc (ptr, size); |
638 | ptr = alloc (ptr, size); |
640 | |
639 | |
641 | if (!ptr && size) |
640 | if (!ptr && size) |
642 | { |
641 | { |
643 | #if EV_AVOID_STDIO |
642 | #if EV_AVOID_STDIO |
644 | ev_printerr ("libev: memory allocation failed, aborting.\n"); |
643 | ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
645 | #else |
644 | #else |
646 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
645 | fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
647 | #endif |
646 | #endif |
648 | abort (); |
647 | abort (); |
649 | } |
648 | } |
650 | |
649 | |
651 | return ptr; |
650 | return ptr; |
… | |
… | |
815 | /* by older ones */ |
814 | /* by older ones */ |
816 | EV_TV_SET (tv, delay); |
815 | EV_TV_SET (tv, delay); |
817 | select (0, 0, 0, 0, &tv); |
816 | select (0, 0, 0, 0, &tv); |
818 | #endif |
817 | #endif |
819 | } |
818 | } |
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|
819 | } |
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820 | |
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821 | inline_speed int |
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|
822 | ev_timeout_to_ms (ev_tstamp timeout) |
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|
823 | { |
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|
824 | int ms = timeout * 1000. + .999999; |
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|
825 | |
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|
826 | return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1; |
820 | } |
827 | } |
821 | |
828 | |
822 | /*****************************************************************************/ |
829 | /*****************************************************************************/ |
823 | |
830 | |
824 | #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
831 | #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
… | |
… | |
1345 | char dummy; |
1352 | char dummy; |
1346 | /* see discussion in evpipe_write when you think this read should be recv in win32 */ |
1353 | /* see discussion in evpipe_write when you think this read should be recv in win32 */ |
1347 | read (evpipe [0], &dummy, 1); |
1354 | read (evpipe [0], &dummy, 1); |
1348 | } |
1355 | } |
1349 | |
1356 | |
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|
1357 | #if EV_SIGNAL_ENABLE |
1350 | if (sig_pending) |
1358 | if (sig_pending) |
1351 | { |
1359 | { |
1352 | sig_pending = 0; |
1360 | sig_pending = 0; |
1353 | |
1361 | |
1354 | for (i = EV_NSIG - 1; i--; ) |
1362 | for (i = EV_NSIG - 1; i--; ) |
1355 | if (expect_false (signals [i].pending)) |
1363 | if (expect_false (signals [i].pending)) |
1356 | ev_feed_signal_event (EV_A_ i + 1); |
1364 | ev_feed_signal_event (EV_A_ i + 1); |
1357 | } |
1365 | } |
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|
1366 | #endif |
1358 | |
1367 | |
1359 | #if EV_ASYNC_ENABLE |
1368 | #if EV_ASYNC_ENABLE |
1360 | if (async_pending) |
1369 | if (async_pending) |
1361 | { |
1370 | { |
1362 | async_pending = 0; |
1371 | async_pending = 0; |
… | |
… | |
1371 | #endif |
1380 | #endif |
1372 | } |
1381 | } |
1373 | |
1382 | |
1374 | /*****************************************************************************/ |
1383 | /*****************************************************************************/ |
1375 | |
1384 | |
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|
1385 | void |
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|
1386 | ev_feed_signal (int signum) |
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|
1387 | { |
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|
1388 | #if EV_MULTIPLICITY |
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|
1389 | EV_P = signals [signum - 1].loop; |
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|
1390 | |
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|
1391 | if (!EV_A) |
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|
1392 | return; |
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|
1393 | #endif |
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1394 | |
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|
1395 | signals [signum - 1].pending = 1; |
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|
1396 | evpipe_write (EV_A_ &sig_pending); |
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|
1397 | } |
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|
1398 | |
1376 | static void |
1399 | static void |
1377 | ev_sighandler (int signum) |
1400 | ev_sighandler (int signum) |
1378 | { |
1401 | { |
1379 | #if EV_MULTIPLICITY |
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|
1380 | EV_P = signals [signum - 1].loop; |
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|
1381 | #endif |
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1382 | |
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|
1383 | #ifdef _WIN32 |
1402 | #ifdef _WIN32 |
1384 | signal (signum, ev_sighandler); |
1403 | signal (signum, ev_sighandler); |
1385 | #endif |
1404 | #endif |
1386 | |
1405 | |
1387 | signals [signum - 1].pending = 1; |
1406 | ev_feed_signal (signum); |
1388 | evpipe_write (EV_A_ &sig_pending); |
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|
1389 | } |
1407 | } |
1390 | |
1408 | |
1391 | void noinline |
1409 | void noinline |
1392 | ev_feed_signal_event (EV_P_ int signum) |
1410 | ev_feed_signal_event (EV_P_ int signum) |
1393 | { |
1411 | { |
… | |
… | |
1645 | static void noinline |
1663 | static void noinline |
1646 | loop_init (EV_P_ unsigned int flags) |
1664 | loop_init (EV_P_ unsigned int flags) |
1647 | { |
1665 | { |
1648 | if (!backend) |
1666 | if (!backend) |
1649 | { |
1667 | { |
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|
1668 | origflags = flags; |
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|
1669 | |
1650 | #if EV_USE_REALTIME |
1670 | #if EV_USE_REALTIME |
1651 | if (!have_realtime) |
1671 | if (!have_realtime) |
1652 | { |
1672 | { |
1653 | struct timespec ts; |
1673 | struct timespec ts; |
1654 | |
1674 | |
… | |
… | |
1699 | #endif |
1719 | #endif |
1700 | #if EV_USE_SIGNALFD |
1720 | #if EV_USE_SIGNALFD |
1701 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1721 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1702 | #endif |
1722 | #endif |
1703 | |
1723 | |
1704 | if (!(flags & 0x0000ffffU)) |
1724 | if (!(flags & EVBACKEND_MASK)) |
1705 | flags |= ev_recommended_backends (); |
1725 | flags |= ev_recommended_backends (); |
1706 | |
1726 | |
1707 | #if EV_USE_IOCP |
1727 | #if EV_USE_IOCP |
1708 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1728 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1709 | #endif |
1729 | #endif |
… | |
… | |
1736 | void |
1756 | void |
1737 | ev_loop_destroy (EV_P) |
1757 | ev_loop_destroy (EV_P) |
1738 | { |
1758 | { |
1739 | int i; |
1759 | int i; |
1740 | |
1760 | |
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|
1761 | #if EV_MULTIPLICITY |
1741 | /* mimic free (0) */ |
1762 | /* mimic free (0) */ |
1742 | if (!EV_A) |
1763 | if (!EV_A) |
1743 | return; |
1764 | return; |
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|
1765 | #endif |
1744 | |
1766 | |
1745 | #if EV_CLEANUP_ENABLE |
1767 | #if EV_CLEANUP_ENABLE |
1746 | /* queue cleanup watchers (and execute them) */ |
1768 | /* queue cleanup watchers (and execute them) */ |
1747 | if (expect_false (cleanupcnt)) |
1769 | if (expect_false (cleanupcnt)) |
1748 | { |
1770 | { |
… | |
… | |
2100 | for (pri = NUMPRI; pri--; ) |
2122 | for (pri = NUMPRI; pri--; ) |
2101 | while (pendingcnt [pri]) |
2123 | while (pendingcnt [pri]) |
2102 | { |
2124 | { |
2103 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2125 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2104 | |
2126 | |
2105 | /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ |
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|
2106 | /* ^ this is no longer true, as pending_w could be here */ |
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|
2107 | |
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|
2108 | p->w->pending = 0; |
2127 | p->w->pending = 0; |
2109 | EV_CB_INVOKE (p->w, p->events); |
2128 | EV_CB_INVOKE (p->w, p->events); |
2110 | EV_FREQUENT_CHECK; |
2129 | EV_FREQUENT_CHECK; |
2111 | } |
2130 | } |
2112 | } |
2131 | } |
… | |
… | |
2173 | feed_reverse_done (EV_A_ EV_TIMER); |
2192 | feed_reverse_done (EV_A_ EV_TIMER); |
2174 | } |
2193 | } |
2175 | } |
2194 | } |
2176 | |
2195 | |
2177 | #if EV_PERIODIC_ENABLE |
2196 | #if EV_PERIODIC_ENABLE |
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2197 | |
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2198 | inline_speed |
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2199 | periodic_recalc (EV_P_ ev_periodic *w) |
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|
2200 | { |
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2201 | /* TODO: use slow but potentially more correct incremental algo, */ |
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2202 | /* also do not rely on ceil */ |
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|
2203 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
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2204 | } |
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2205 | |
2178 | /* make periodics pending */ |
2206 | /* make periodics pending */ |
2179 | inline_size void |
2207 | inline_size void |
2180 | periodics_reify (EV_P) |
2208 | periodics_reify (EV_P) |
2181 | { |
2209 | { |
2182 | EV_FREQUENT_CHECK; |
2210 | EV_FREQUENT_CHECK; |
… | |
… | |
2201 | ANHE_at_cache (periodics [HEAP0]); |
2229 | ANHE_at_cache (periodics [HEAP0]); |
2202 | downheap (periodics, periodiccnt, HEAP0); |
2230 | downheap (periodics, periodiccnt, HEAP0); |
2203 | } |
2231 | } |
2204 | else if (w->interval) |
2232 | else if (w->interval) |
2205 | { |
2233 | { |
2206 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2234 | periodic_recalc (EV_A_ w); |
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|
2235 | |
2207 | /* if next trigger time is not sufficiently in the future, put it there */ |
2236 | /* if next trigger time is not sufficiently in the future, put it there */ |
2208 | /* this might happen because of floating point inexactness */ |
2237 | /* this might happen because of floating point inexactness */ |
2209 | if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
2238 | if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
2210 | { |
2239 | { |
2211 | ev_at (w) += w->interval; |
2240 | ev_at (w) += w->interval; |
… | |
… | |
2245 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
2274 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
2246 | |
2275 | |
2247 | if (w->reschedule_cb) |
2276 | if (w->reschedule_cb) |
2248 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2277 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2249 | else if (w->interval) |
2278 | else if (w->interval) |
2250 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2279 | periodic_recalc (EV_A_ w); |
2251 | |
2280 | |
2252 | ANHE_at_cache (periodics [i]); |
2281 | ANHE_at_cache (periodics [i]); |
2253 | } |
2282 | } |
2254 | |
2283 | |
2255 | reheap (periodics, periodiccnt); |
2284 | reheap (periodics, periodiccnt); |
… | |
… | |
2747 | if (w->reschedule_cb) |
2776 | if (w->reschedule_cb) |
2748 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2777 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2749 | else if (w->interval) |
2778 | else if (w->interval) |
2750 | { |
2779 | { |
2751 | assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2780 | assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2752 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
2781 | periodic_recalc (EV_A_ w); |
2753 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
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|
2754 | } |
2782 | } |
2755 | else |
2783 | else |
2756 | ev_at (w) = w->offset; |
2784 | ev_at (w) = w->offset; |
2757 | |
2785 | |
2758 | EV_FREQUENT_CHECK; |
2786 | EV_FREQUENT_CHECK; |
… | |
… | |
2879 | sa.sa_handler = ev_sighandler; |
2907 | sa.sa_handler = ev_sighandler; |
2880 | sigfillset (&sa.sa_mask); |
2908 | sigfillset (&sa.sa_mask); |
2881 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2909 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2882 | sigaction (w->signum, &sa, 0); |
2910 | sigaction (w->signum, &sa, 0); |
2883 | |
2911 | |
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|
2912 | if (origflags & EVFLAG_NOSIGMASK) |
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|
2913 | { |
2884 | sigemptyset (&sa.sa_mask); |
2914 | sigemptyset (&sa.sa_mask); |
2885 | sigaddset (&sa.sa_mask, w->signum); |
2915 | sigaddset (&sa.sa_mask, w->signum); |
2886 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
2916 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
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|
2917 | } |
2887 | #endif |
2918 | #endif |
2888 | } |
2919 | } |
2889 | |
2920 | |
2890 | EV_FREQUENT_CHECK; |
2921 | EV_FREQUENT_CHECK; |
2891 | } |
2922 | } |