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Comparing libev/ev.c (file contents):
Revision 1.349 by sf-exg, Fri Oct 15 22:59:59 2010 UTC vs.
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC

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 *
… …
34 * by deleting the provisions above and replace them with the notice 34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43 39
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
… …
182# include EV_H 178# include EV_H
183#else 179#else
184# include "ev.h" 180# include "ev.h"
185#endif 181#endif
186 182
183EV_CPP(extern "C" {)
184
187#ifndef _WIN32 185#ifndef _WIN32
188# include <sys/time.h> 186# include <sys/time.h>
189# include <sys/wait.h> 187# include <sys/wait.h>
190# include <unistd.h> 188# include <unistd.h>
191#else 189#else
… …
378# undef EV_USE_INOTIFY 376# undef EV_USE_INOTIFY
379# define EV_USE_INOTIFY 0 377# define EV_USE_INOTIFY 0
380#endif 378#endif
381 379
382#if !EV_USE_NANOSLEEP 380#if !EV_USE_NANOSLEEP
383# ifndef _WIN32 381/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux)
384# include <sys/select.h> 383# include <sys/select.h>
385# endif 384# endif
386#endif 385#endif
387 386
388#if EV_USE_INOTIFY 387#if EV_USE_INOTIFY
389# include <sys/utsname.h>
390# include <sys/statfs.h> 388# include <sys/statfs.h>
391# include <sys/inotify.h> 389# include <sys/inotify.h>
392/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
393# ifndef IN_DONT_FOLLOW 391# ifndef IN_DONT_FOLLOW
394# undef EV_USE_INOTIFY 392# undef EV_USE_INOTIFY
… …
411# define EFD_CLOEXEC O_CLOEXEC 409# define EFD_CLOEXEC O_CLOEXEC
412# else 410# else
413# define EFD_CLOEXEC 02000000 411# define EFD_CLOEXEC 02000000
414# endif 412# endif
415# endif 413# endif
416# ifdef __cplusplus
417extern "C" {
418# endif
419int (eventfd) (unsigned int initval, int flags); 414EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
420# ifdef __cplusplus
421}
422# endif
423#endif 415#endif
424 416
425#if EV_USE_SIGNALFD 417#if EV_USE_SIGNALFD
426/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 418/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427# include <stdint.h> 419# include <stdint.h>
… …
433# define SFD_CLOEXEC O_CLOEXEC 425# define SFD_CLOEXEC O_CLOEXEC
434# else 426# else
435# define SFD_CLOEXEC 02000000 427# define SFD_CLOEXEC 02000000
436# endif 428# endif
437# endif 429# endif
438# ifdef __cplusplus
439extern "C" {
440# endif
441int signalfd (int fd, const sigset_t *mask, int flags); 430EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
442 431
443struct signalfd_siginfo 432struct signalfd_siginfo
444{ 433{
445 uint32_t ssi_signo; 434 uint32_t ssi_signo;
446 char pad[128 - sizeof (uint32_t)]; 435 char pad[128 - sizeof (uint32_t)];
447}; 436};
448# ifdef __cplusplus
449}
450# endif
451#endif 437#endif
452 438
453/**/ 439/**/
454 440
455#if EV_VERIFY >= 3 441#if EV_VERIFY >= 3
… …
537# include "ev_win32.c" 523# include "ev_win32.c"
538#endif 524#endif
539 525
540/*****************************************************************************/ 526/*****************************************************************************/
541 527
528#ifdef __linux
529# include <sys/utsname.h>
530#endif
531
532static unsigned int noinline
533ev_linux_version (void)
534{
535#ifdef __linux
536 unsigned int v = 0;
537 struct utsname buf;
538 int i;
539 char *p = buf.release;
540
541 if (uname (&buf))
542 return 0;
543
544 for (i = 3+1; --i; )
545 {
546 unsigned int c = 0;
547
548 for (;;)
549 {
550 if (*p >= '0' && *p <= '9')
551 c = c * 10 + *p++ - '0';
552 else
553 {
554 p += *p == '.';
555 break;
556 }
557 }
558
559 v = (v << 8) | c;
560 }
561
562 return v;
563#else
564 return 0;
565#endif
566}
567
568/*****************************************************************************/
569
542#if EV_AVOID_STDIO 570#if EV_AVOID_STDIO
543static void noinline 571static void noinline
544ev_printerr (const char *msg) 572ev_printerr (const char *msg)
545{ 573{
546 write (STDERR_FILENO, msg, strlen (msg)); 574 write (STDERR_FILENO, msg, strlen (msg));
… …
564 if (syserr_cb) 592 if (syserr_cb)
565 syserr_cb (msg); 593 syserr_cb (msg);
566 else 594 else
567 { 595 {
568#if EV_AVOID_STDIO 596#if EV_AVOID_STDIO
569 const char *err = strerror (errno);
570
571 ev_printerr (msg); 597 ev_printerr (msg);
572 ev_printerr (": "); 598 ev_printerr (": ");
573 ev_printerr (err); 599 ev_printerr (strerror (errno));
574 ev_printerr ("\n"); 600 ev_printerr ("\n");
575#else 601#else
576 perror (msg); 602 perror (msg);
577#endif 603#endif
578 abort (); 604 abort ();
… …
612 ptr = alloc (ptr, size); 638 ptr = alloc (ptr, size);
613 639
614 if (!ptr && size) 640 if (!ptr && size)
615 { 641 {
616#if EV_AVOID_STDIO 642#if EV_AVOID_STDIO
617 ev_printerr ("libev: memory allocation failed, aborting.\n"); 643 ev_printerr ("(libev) memory allocation failed, aborting.\n");
618#else 644#else
619 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 645 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
620#endif 646#endif
621 abort (); 647 abort ();
622 } 648 }
623 649
624 return ptr; 650 return ptr;
… …
641 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 667 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
642 unsigned char unused; 668 unsigned char unused;
643#if EV_USE_EPOLL 669#if EV_USE_EPOLL
644 unsigned int egen; /* generation counter to counter epoll bugs */ 670 unsigned int egen; /* generation counter to counter epoll bugs */
645#endif 671#endif
646#if EV_SELECT_IS_WINSOCKET 672#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
647 SOCKET handle; 673 SOCKET handle;
674#endif
675#if EV_USE_IOCP
676 OVERLAPPED or, ow;
648#endif 677#endif
649} ANFD; 678} ANFD;
650 679
651/* stores the pending event set for a given watcher */ 680/* stores the pending event set for a given watcher */
652typedef struct 681typedef struct
… …
717# define EV_RELEASE_CB (void)0 746# define EV_RELEASE_CB (void)0
718# define EV_ACQUIRE_CB (void)0 747# define EV_ACQUIRE_CB (void)0
719# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 748# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720#endif 749#endif
721 750
722#define EVUNLOOP_RECURSE 0x80 751#define EVBREAK_RECURSE 0x80
723 752
724/*****************************************************************************/ 753/*****************************************************************************/
725 754
726#ifndef EV_HAVE_EV_TIME 755#ifndef EV_HAVE_EV_TIME
727ev_tstamp 756ev_tstamp
… …
785 /* by older ones */ 814 /* by older ones */
786 EV_TV_SET (tv, delay); 815 EV_TV_SET (tv, delay);
787 select (0, 0, 0, 0, &tv); 816 select (0, 0, 0, 0, &tv);
788#endif 817#endif
789 } 818 }
819}
820
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
790} 827}
791 828
792/*****************************************************************************/ 829/*****************************************************************************/
793 830
794#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 */
… …
943 { 980 {
944 int fd = fdchanges [i]; 981 int fd = fdchanges [i];
945 ANFD *anfd = anfds + fd; 982 ANFD *anfd = anfds + fd;
946 ev_io *w; 983 ev_io *w;
947 984
948 unsigned char events = 0; 985 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify;
949 987
950 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 988 anfd->reify = 0;
951 events |= (unsigned char)w->events;
952 989
953#if EV_SELECT_IS_WINSOCKET 990#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
954 if (events) 991 if (o_reify & EV__IOFDSET)
955 { 992 {
956 unsigned long arg; 993 unsigned long arg;
957 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 994 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
958 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 995 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996 printf ("oi %d %x\n", fd, anfd->handle);//D
959 } 997 }
960#endif 998#endif
961 999
1000 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
962 { 1001 {
963 unsigned char o_events = anfd->events;
964 unsigned char o_reify = anfd->reify;
965
966 anfd->reify = 0;
967 anfd->events = events; 1002 anfd->events = 0;
968 1003
969 if (o_events != events || o_reify & EV__IOFDSET) 1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1005 anfd->events |= (unsigned char)w->events;
1006
1007 if (o_events != anfd->events)
1008 o_reify = EV__IOFDSET; /* actually |= */
1009 }
1010
1011 if (o_reify & EV__IOFDSET)
970 backend_modify (EV_A_ fd, o_events, events); 1012 backend_modify (EV_A_ fd, o_events, anfd->events);
971 }
972 } 1013 }
973 1014
974 fdchangecnt = 0; 1015 fdchangecnt = 0;
975} 1016}
976 1017
… …
1311 char dummy; 1352 char dummy;
1312 /* 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 */
1313 read (evpipe [0], &dummy, 1); 1354 read (evpipe [0], &dummy, 1);
1314 } 1355 }
1315 1356
1357#if EV_SIGNAL_ENABLE
1316 if (sig_pending) 1358 if (sig_pending)
1317 { 1359 {
1318 sig_pending = 0; 1360 sig_pending = 0;
1319 1361
1320 for (i = EV_NSIG - 1; i--; ) 1362 for (i = EV_NSIG - 1; i--; )
1321 if (expect_false (signals [i].pending)) 1363 if (expect_false (signals [i].pending))
1322 ev_feed_signal_event (EV_A_ i + 1); 1364 ev_feed_signal_event (EV_A_ i + 1);
1323 } 1365 }
1366#endif
1324 1367
1325#if EV_ASYNC_ENABLE 1368#if EV_ASYNC_ENABLE
1326 if (async_pending) 1369 if (async_pending)
1327 { 1370 {
1328 async_pending = 0; 1371 async_pending = 0;
… …
1337#endif 1380#endif
1338} 1381}
1339 1382
1340/*****************************************************************************/ 1383/*****************************************************************************/
1341 1384
1385void
1386ev_feed_signal (int signum)
1387{
1388#if EV_MULTIPLICITY
1389 EV_P = signals [signum - 1].loop;
1390
1391 if (!EV_A)
1392 return;
1393#endif
1394
1395 signals [signum - 1].pending = 1;
1396 evpipe_write (EV_A_ &sig_pending);
1397}
1398
1342static void 1399static void
1343ev_sighandler (int signum) 1400ev_sighandler (int signum)
1344{ 1401{
1345#if EV_MULTIPLICITY
1346 EV_P = signals [signum - 1].loop;
1347#endif
1348
1349#ifdef _WIN32 1402#ifdef _WIN32
1350 signal (signum, ev_sighandler); 1403 signal (signum, ev_sighandler);
1351#endif 1404#endif
1352 1405
1353 signals [signum - 1].pending = 1; 1406 ev_feed_signal (signum);
1354 evpipe_write (EV_A_ &sig_pending);
1355} 1407}
1356 1408
1357void noinline 1409void noinline
1358ev_feed_signal_event (EV_P_ int signum) 1410ev_feed_signal_event (EV_P_ int signum)
1359{ 1411{
… …
1459 1511
1460#endif 1512#endif
1461 1513
1462/*****************************************************************************/ 1514/*****************************************************************************/
1463 1515
1516#if EV_USE_IOCP
1517# include "ev_iocp.c"
1518#endif
1464#if EV_USE_PORT 1519#if EV_USE_PORT
1465# include "ev_port.c" 1520# include "ev_port.c"
1466#endif 1521#endif
1467#if EV_USE_KQUEUE 1522#if EV_USE_KQUEUE
1468# include "ev_kqueue.c" 1523# include "ev_kqueue.c"
… …
1541ev_embeddable_backends (void) 1596ev_embeddable_backends (void)
1542{ 1597{
1543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1544 1599
1545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1546 /* please fix it and tell me how to detect the fix */ 1601 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1547 flags &= ~EVBACKEND_EPOLL; 1602 flags &= ~EVBACKEND_EPOLL;
1548 1603
1549 return flags; 1604 return flags;
1550} 1605}
1551 1606
1552unsigned int 1607unsigned int
… …
1608static void noinline 1663static void noinline
1609loop_init (EV_P_ unsigned int flags) 1664loop_init (EV_P_ unsigned int flags)
1610{ 1665{
1611 if (!backend) 1666 if (!backend)
1612 { 1667 {
1668 origflags = flags;
1669
1613#if EV_USE_REALTIME 1670#if EV_USE_REALTIME
1614 if (!have_realtime) 1671 if (!have_realtime)
1615 { 1672 {
1616 struct timespec ts; 1673 struct timespec ts;
1617 1674
… …
1662#endif 1719#endif
1663#if EV_USE_SIGNALFD 1720#if EV_USE_SIGNALFD
1664 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1665#endif 1722#endif
1666 1723
1667 if (!(flags & 0x0000ffffU)) 1724 if (!(flags & EVBACKEND_MASK))
1668 flags |= ev_recommended_backends (); 1725 flags |= ev_recommended_backends ();
1669 1726
1727#if EV_USE_IOCP
1728 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1729#endif
1670#if EV_USE_PORT 1730#if EV_USE_PORT
1671 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1731 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1672#endif 1732#endif
1673#if EV_USE_KQUEUE 1733#if EV_USE_KQUEUE
1674 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1734 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1691#endif 1751#endif
1692 } 1752 }
1693} 1753}
1694 1754
1695/* free up a loop structure */ 1755/* free up a loop structure */
1696static void noinline 1756void
1697loop_destroy (EV_P) 1757ev_loop_destroy (EV_P)
1698{ 1758{
1699 int i; 1759 int i;
1760
1761#if EV_MULTIPLICITY
1762 /* mimic free (0) */
1763 if (!EV_A)
1764 return;
1765#endif
1766
1767#if EV_CLEANUP_ENABLE
1768 /* queue cleanup watchers (and execute them) */
1769 if (expect_false (cleanupcnt))
1770 {
1771 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1772 EV_INVOKE_PENDING;
1773 }
1774#endif
1775
1776#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev))
1778 {
1779 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev);
1781 }
1782#endif
1700 1783
1701 if (ev_is_active (&pipe_w)) 1784 if (ev_is_active (&pipe_w))
1702 { 1785 {
1703 /*ev_ref (EV_A);*/ 1786 /*ev_ref (EV_A);*/
1704 /*ev_io_stop (EV_A_ &pipe_w);*/ 1787 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1726#endif 1809#endif
1727 1810
1728 if (backend_fd >= 0) 1811 if (backend_fd >= 0)
1729 close (backend_fd); 1812 close (backend_fd);
1730 1813
1814#if EV_USE_IOCP
1815 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1816#endif
1731#if EV_USE_PORT 1817#if EV_USE_PORT
1732 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1818 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1733#endif 1819#endif
1734#if EV_USE_KQUEUE 1820#if EV_USE_KQUEUE
1735 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1821 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1762 array_free (periodic, EMPTY); 1848 array_free (periodic, EMPTY);
1763#endif 1849#endif
1764#if EV_FORK_ENABLE 1850#if EV_FORK_ENABLE
1765 array_free (fork, EMPTY); 1851 array_free (fork, EMPTY);
1766#endif 1852#endif
1853#if EV_CLEANUP_ENABLE
1854 array_free (cleanup, EMPTY);
1855#endif
1767 array_free (prepare, EMPTY); 1856 array_free (prepare, EMPTY);
1768 array_free (check, EMPTY); 1857 array_free (check, EMPTY);
1769#if EV_ASYNC_ENABLE 1858#if EV_ASYNC_ENABLE
1770 array_free (async, EMPTY); 1859 array_free (async, EMPTY);
1771#endif 1860#endif
1772 1861
1773 backend = 0; 1862 backend = 0;
1863
1864#if EV_MULTIPLICITY
1865 if (ev_is_default_loop (EV_A))
1866#endif
1867 ev_default_loop_ptr = 0;
1868#if EV_MULTIPLICITY
1869 else
1870 ev_free (EV_A);
1871#endif
1774} 1872}
1775 1873
1776#if EV_USE_INOTIFY 1874#if EV_USE_INOTIFY
1777inline_size void infy_fork (EV_P); 1875inline_size void infy_fork (EV_P);
1778#endif 1876#endif
… …
1837 loop_init (EV_A_ flags); 1935 loop_init (EV_A_ flags);
1838 1936
1839 if (ev_backend (EV_A)) 1937 if (ev_backend (EV_A))
1840 return EV_A; 1938 return EV_A;
1841 1939
1940 ev_free (EV_A);
1842 return 0; 1941 return 0;
1843} 1942}
1844 1943
1845void
1846ev_loop_destroy (EV_P)
1847{
1848 loop_destroy (EV_A);
1849 ev_free (loop);
1850}
1851
1852void
1853ev_loop_fork (EV_P)
1854{
1855 postfork = 1; /* must be in line with ev_default_fork */
1856}
1857#endif /* multiplicity */ 1944#endif /* multiplicity */
1858 1945
1859#if EV_VERIFY 1946#if EV_VERIFY
1860static void noinline 1947static void noinline
1861verify_watcher (EV_P_ W w) 1948verify_watcher (EV_P_ W w)
… …
1936#if EV_FORK_ENABLE 2023#if EV_FORK_ENABLE
1937 assert (forkmax >= forkcnt); 2024 assert (forkmax >= forkcnt);
1938 array_verify (EV_A_ (W *)forks, forkcnt); 2025 array_verify (EV_A_ (W *)forks, forkcnt);
1939#endif 2026#endif
1940 2027
2028#if EV_CLEANUP_ENABLE
2029 assert (cleanupmax >= cleanupcnt);
2030 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2031#endif
2032
1941#if EV_ASYNC_ENABLE 2033#if EV_ASYNC_ENABLE
1942 assert (asyncmax >= asynccnt); 2034 assert (asyncmax >= asynccnt);
1943 array_verify (EV_A_ (W *)asyncs, asynccnt); 2035 array_verify (EV_A_ (W *)asyncs, asynccnt);
1944#endif 2036#endif
1945 2037
… …
1963} 2055}
1964#endif 2056#endif
1965 2057
1966#if EV_MULTIPLICITY 2058#if EV_MULTIPLICITY
1967struct ev_loop * 2059struct ev_loop *
1968ev_default_loop_init (unsigned int flags)
1969#else 2060#else
1970int 2061int
2062#endif
1971ev_default_loop (unsigned int flags) 2063ev_default_loop (unsigned int flags)
1972#endif
1973{ 2064{
1974 if (!ev_default_loop_ptr) 2065 if (!ev_default_loop_ptr)
1975 { 2066 {
1976#if EV_MULTIPLICITY 2067#if EV_MULTIPLICITY
1977 EV_P = ev_default_loop_ptr = &default_loop_struct; 2068 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1996 2087
1997 return ev_default_loop_ptr; 2088 return ev_default_loop_ptr;
1998} 2089}
1999 2090
2000void 2091void
2001ev_default_destroy (void) 2092ev_loop_fork (EV_P)
2002{ 2093{
2003#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr;
2005#endif
2006
2007 ev_default_loop_ptr = 0;
2008
2009#if EV_CHILD_ENABLE
2010 ev_ref (EV_A); /* child watcher */
2011 ev_signal_stop (EV_A_ &childev);
2012#endif
2013
2014 loop_destroy (EV_A);
2015}
2016
2017void
2018ev_default_fork (void)
2019{
2020#if EV_MULTIPLICITY
2021 EV_P = ev_default_loop_ptr;
2022#endif
2023
2024 postfork = 1; /* must be in line with ev_loop_fork */ 2094 postfork = 1; /* must be in line with ev_default_fork */
2025} 2095}
2026 2096
2027/*****************************************************************************/ 2097/*****************************************************************************/
2028 2098
2029void 2099void
… …
2051 2121
2052 for (pri = NUMPRI; pri--; ) 2122 for (pri = NUMPRI; pri--; )
2053 while (pendingcnt [pri]) 2123 while (pendingcnt [pri])
2054 { 2124 {
2055 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2056
2057 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2058 /* ^ this is no longer true, as pending_w could be here */
2059 2126
2060 p->w->pending = 0; 2127 p->w->pending = 0;
2061 EV_CB_INVOKE (p->w, p->events); 2128 EV_CB_INVOKE (p->w, p->events);
2062 EV_FREQUENT_CHECK; 2129 EV_FREQUENT_CHECK;
2063 } 2130 }
… …
2125 feed_reverse_done (EV_A_ EV_TIMER); 2192 feed_reverse_done (EV_A_ EV_TIMER);
2126 } 2193 }
2127} 2194}
2128 2195
2129#if EV_PERIODIC_ENABLE 2196#if EV_PERIODIC_ENABLE
2197
2198inline_speed
2199periodic_recalc (EV_P_ ev_periodic *w)
2200{
2201 /* TODO: use slow but potentially more correct incremental algo, */
2202 /* also do not rely on ceil */
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2204}
2205
2130/* make periodics pending */ 2206/* make periodics pending */
2131inline_size void 2207inline_size void
2132periodics_reify (EV_P) 2208periodics_reify (EV_P)
2133{ 2209{
2134 EV_FREQUENT_CHECK; 2210 EV_FREQUENT_CHECK;
… …
2153 ANHE_at_cache (periodics [HEAP0]); 2229 ANHE_at_cache (periodics [HEAP0]);
2154 downheap (periodics, periodiccnt, HEAP0); 2230 downheap (periodics, periodiccnt, HEAP0);
2155 } 2231 }
2156 else if (w->interval) 2232 else if (w->interval)
2157 { 2233 {
2158 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2234 periodic_recalc (EV_A_ w);
2235
2159 /* 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 */
2160 /* this might happen because of floating point inexactness */ 2237 /* this might happen because of floating point inexactness */
2161 if (ev_at (w) - ev_rt_now < TIME_EPSILON) 2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2162 { 2239 {
2163 ev_at (w) += w->interval; 2240 ev_at (w) += w->interval;
… …
2197 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2274 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2198 2275
2199 if (w->reschedule_cb) 2276 if (w->reschedule_cb)
2200 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2277 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2201 else if (w->interval) 2278 else if (w->interval)
2202 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2279 periodic_recalc (EV_A_ w);
2203 2280
2204 ANHE_at_cache (periodics [i]); 2281 ANHE_at_cache (periodics [i]);
2205 } 2282 }
2206 2283
2207 reheap (periodics, periodiccnt); 2284 reheap (periodics, periodiccnt);
… …
2289 mn_now = ev_rt_now; 2366 mn_now = ev_rt_now;
2290 } 2367 }
2291} 2368}
2292 2369
2293void 2370void
2294ev_loop (EV_P_ int flags) 2371ev_run (EV_P_ int flags)
2295{ 2372{
2296#if EV_FEATURE_API 2373#if EV_FEATURE_API
2297 ++loop_depth; 2374 ++loop_depth;
2298#endif 2375#endif
2299 2376
2300 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2377 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2301 2378
2302 loop_done = EVUNLOOP_CANCEL; 2379 loop_done = EVBREAK_CANCEL;
2303 2380
2304 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2381 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2305 2382
2306 do 2383 do
2307 { 2384 {
… …
2350 /* calculate blocking time */ 2427 /* calculate blocking time */
2351 { 2428 {
2352 ev_tstamp waittime = 0.; 2429 ev_tstamp waittime = 0.;
2353 ev_tstamp sleeptime = 0.; 2430 ev_tstamp sleeptime = 0.;
2354 2431
2432 /* remember old timestamp for io_blocktime calculation */
2433 ev_tstamp prev_mn_now = mn_now;
2434
2435 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100);
2437
2355 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2356 { 2439 {
2357 /* remember old timestamp for io_blocktime calculation */
2358 ev_tstamp prev_mn_now = mn_now;
2359
2360 /* update time to cancel out callback processing overhead */
2361 time_update (EV_A_ 1e100);
2362
2363 waittime = MAX_BLOCKTIME; 2440 waittime = MAX_BLOCKTIME;
2364 2441
2365 if (timercnt) 2442 if (timercnt)
2366 { 2443 {
2367 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
… …
2397 } 2474 }
2398 2475
2399#if EV_FEATURE_API 2476#if EV_FEATURE_API
2400 ++loop_count; 2477 ++loop_count;
2401#endif 2478#endif
2402 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2403 backend_poll (EV_A_ waittime); 2480 backend_poll (EV_A_ waittime);
2404 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2405 2482
2406 /* update ev_rt_now, do magic */ 2483 /* update ev_rt_now, do magic */
2407 time_update (EV_A_ waittime + sleeptime); 2484 time_update (EV_A_ waittime + sleeptime);
2408 } 2485 }
2409 2486
… …
2427 EV_INVOKE_PENDING; 2504 EV_INVOKE_PENDING;
2428 } 2505 }
2429 while (expect_true ( 2506 while (expect_true (
2430 activecnt 2507 activecnt
2431 && !loop_done 2508 && !loop_done
2432 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2509 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2433 )); 2510 ));
2434 2511
2435 if (loop_done == EVUNLOOP_ONE) 2512 if (loop_done == EVBREAK_ONE)
2436 loop_done = EVUNLOOP_CANCEL; 2513 loop_done = EVBREAK_CANCEL;
2437 2514
2438#if EV_FEATURE_API 2515#if EV_FEATURE_API
2439 --loop_depth; 2516 --loop_depth;
2440#endif 2517#endif
2441} 2518}
2442 2519
2443void 2520void
2444ev_unloop (EV_P_ int how) 2521ev_break (EV_P_ int how)
2445{ 2522{
2446 loop_done = how; 2523 loop_done = how;
2447} 2524}
2448 2525
2449void 2526void
… …
2597 EV_FREQUENT_CHECK; 2674 EV_FREQUENT_CHECK;
2598 2675
2599 wlist_del (&anfds[w->fd].head, (WL)w); 2676 wlist_del (&anfds[w->fd].head, (WL)w);
2600 ev_stop (EV_A_ (W)w); 2677 ev_stop (EV_A_ (W)w);
2601 2678
2602 fd_change (EV_A_ w->fd, 1); 2679 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2603 2680
2604 EV_FREQUENT_CHECK; 2681 EV_FREQUENT_CHECK;
2605} 2682}
2606 2683
2607void noinline 2684void noinline
… …
2699 if (w->reschedule_cb) 2776 if (w->reschedule_cb)
2700 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2777 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2701 else if (w->interval) 2778 else if (w->interval)
2702 { 2779 {
2703 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.));
2704 /* this formula differs from the one in periodic_reify because we do not always round up */ 2781 periodic_recalc (EV_A_ w);
2705 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2706 } 2782 }
2707 else 2783 else
2708 ev_at (w) = w->offset; 2784 ev_at (w) = w->offset;
2709 2785
2710 EV_FREQUENT_CHECK; 2786 EV_FREQUENT_CHECK;
… …
2831 sa.sa_handler = ev_sighandler; 2907 sa.sa_handler = ev_sighandler;
2832 sigfillset (&sa.sa_mask); 2908 sigfillset (&sa.sa_mask);
2833 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 */
2834 sigaction (w->signum, &sa, 0); 2910 sigaction (w->signum, &sa, 0);
2835 2911
2912 if (origflags & EVFLAG_NOSIGMASK)
2913 {
2836 sigemptyset (&sa.sa_mask); 2914 sigemptyset (&sa.sa_mask);
2837 sigaddset (&sa.sa_mask, w->signum); 2915 sigaddset (&sa.sa_mask, w->signum);
2838 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2916 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2917 }
2839#endif 2918#endif
2840 } 2919 }
2841 2920
2842 EV_FREQUENT_CHECK; 2921 EV_FREQUENT_CHECK;
2843} 2922}
… …
3059 { 3138 {
3060 struct inotify_event *ev = (struct inotify_event *)(buf + ofs); 3139 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3061 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3140 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3062 ofs += sizeof (struct inotify_event) + ev->len; 3141 ofs += sizeof (struct inotify_event) + ev->len;
3063 } 3142 }
3064}
3065
3066inline_size unsigned int
3067ev_linux_version (void)
3068{
3069 struct utsname buf;
3070 unsigned int v;
3071 int i;
3072 char *p = buf.release;
3073
3074 if (uname (&buf))
3075 return 0;
3076
3077 for (i = 3+1; --i; )
3078 {
3079 unsigned int c = 0;
3080
3081 for (;;)
3082 {
3083 if (*p >= '0' && *p <= '9')
3084 c = c * 10 + *p++ - '0';
3085 else
3086 {
3087 p += *p == '.';
3088 break;
3089 }
3090 }
3091
3092 v = (v << 8) | c;
3093 }
3094
3095 return v;
3096} 3143}
3097 3144
3098inline_size void 3145inline_size void
3099ev_check_2625 (EV_P) 3146ev_check_2625 (EV_P)
3100{ 3147{
… …
3424 3471
3425#if EV_EMBED_ENABLE 3472#if EV_EMBED_ENABLE
3426void noinline 3473void noinline
3427ev_embed_sweep (EV_P_ ev_embed *w) 3474ev_embed_sweep (EV_P_ ev_embed *w)
3428{ 3475{
3429 ev_loop (w->other, EVLOOP_NONBLOCK); 3476 ev_run (w->other, EVRUN_NOWAIT);
3430} 3477}
3431 3478
3432static void 3479static void
3433embed_io_cb (EV_P_ ev_io *io, int revents) 3480embed_io_cb (EV_P_ ev_io *io, int revents)
3434{ 3481{
3435 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3482 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3436 3483
3437 if (ev_cb (w)) 3484 if (ev_cb (w))
3438 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3485 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3439 else 3486 else
3440 ev_loop (w->other, EVLOOP_NONBLOCK); 3487 ev_run (w->other, EVRUN_NOWAIT);
3441} 3488}
3442 3489
3443static void 3490static void
3444embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3491embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3445{ 3492{
… …
3449 EV_P = w->other; 3496 EV_P = w->other;
3450 3497
3451 while (fdchangecnt) 3498 while (fdchangecnt)
3452 { 3499 {
3453 fd_reify (EV_A); 3500 fd_reify (EV_A);
3454 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3501 ev_run (EV_A_ EVRUN_NOWAIT);
3455 } 3502 }
3456 } 3503 }
3457} 3504}
3458 3505
3459static void 3506static void
… …
3465 3512
3466 { 3513 {
3467 EV_P = w->other; 3514 EV_P = w->other;
3468 3515
3469 ev_loop_fork (EV_A); 3516 ev_loop_fork (EV_A);
3470 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3517 ev_run (EV_A_ EVRUN_NOWAIT);
3471 } 3518 }
3472 3519
3473 ev_embed_start (EV_A_ w); 3520 ev_embed_start (EV_A_ w);
3474} 3521}
3475 3522
… …
3567 3614
3568 EV_FREQUENT_CHECK; 3615 EV_FREQUENT_CHECK;
3569} 3616}
3570#endif 3617#endif
3571 3618
3572#if EV_ASYNC_ENABLE 3619#if EV_CLEANUP_ENABLE
3573void 3620void
3574ev_async_start (EV_P_ ev_async *w) 3621ev_cleanup_start (EV_P_ ev_cleanup *w)
3575{ 3622{
3576 if (expect_false (ev_is_active (w))) 3623 if (expect_false (ev_is_active (w)))
3577 return; 3624 return;
3625
3626 EV_FREQUENT_CHECK;
3627
3628 ev_start (EV_A_ (W)w, ++cleanupcnt);
3629 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3630 cleanups [cleanupcnt - 1] = w;
3631
3632 /* cleanup watchers should never keep a refcount on the loop */
3633 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK;
3635}
3636
3637void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w)
3639{
3640 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w)))
3642 return;
3643
3644 EV_FREQUENT_CHECK;
3645 ev_ref (EV_A);
3646
3647 {
3648 int active = ev_active (w);
3649
3650 cleanups [active - 1] = cleanups [--cleanupcnt];
3651 ev_active (cleanups [active - 1]) = active;
3652 }
3653
3654 ev_stop (EV_A_ (W)w);
3655
3656 EV_FREQUENT_CHECK;
3657}
3658#endif
3659
3660#if EV_ASYNC_ENABLE
3661void
3662ev_async_start (EV_P_ ev_async *w)
3663{
3664 if (expect_false (ev_is_active (w)))
3665 return;
3666
3667 w->sent = 0;
3578 3668
3579 evpipe_init (EV_A); 3669 evpipe_init (EV_A);
3580 3670
3581 EV_FREQUENT_CHECK; 3671 EV_FREQUENT_CHECK;
3582 3672
… …
3802 3892
3803#if EV_MULTIPLICITY 3893#if EV_MULTIPLICITY
3804 #include "ev_wrap.h" 3894 #include "ev_wrap.h"
3805#endif 3895#endif
3806 3896
3807#ifdef __cplusplus 3897EV_CPP(})
3808}
3809#endif
3810 3898

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