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Comparing libev/ev.c (file contents):
Revision 1.343 by root, Fri Apr 2 21:03:46 2010 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
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 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
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
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
160# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
161# endif 163# endif
162 164
163#endif 165#endif
164 166
165#include <math.h>
166#include <stdlib.h> 167#include <stdlib.h>
167#include <string.h> 168#include <string.h>
168#include <fcntl.h> 169#include <fcntl.h>
169#include <stddef.h> 170#include <stddef.h>
170 171
… …
181#ifdef EV_H 182#ifdef EV_H
182# include EV_H 183# include EV_H
183#else 184#else
184# include "ev.h" 185# include "ev.h"
185#endif 186#endif
187
188EV_CPP(extern "C" {)
186 189
187#ifndef _WIN32 190#ifndef _WIN32
188# include <sys/time.h> 191# include <sys/time.h>
189# include <sys/wait.h> 192# include <sys/wait.h>
190# include <unistd.h> 193# include <unistd.h>
… …
195# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
196# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
197# endif 200# endif
198# undef EV_AVOID_STDIO 201# undef EV_AVOID_STDIO
199#endif 202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
200 211
201/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
202 213
203/* try to deduce the maximum number of signals on this platform */ 214/* try to deduce the maximum number of signals on this platform */
204#if defined (EV_NSIG) 215#if defined (EV_NSIG)
… …
226/* to make it compile regardless, just remove the above line, */ 237/* to make it compile regardless, just remove the above line, */
227/* but consider reporting it, too! :) */ 238/* but consider reporting it, too! :) */
228# define EV_NSIG 65 239# define EV_NSIG 65
229#endif 240#endif
230 241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
231#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
232# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
233# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
234# else 249# else
235# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
… …
370# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
371# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
372#endif 387#endif
373 388
374#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
375# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
376# include <sys/select.h> 392# include <sys/select.h>
377# endif 393# endif
378#endif 394#endif
379 395
380#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
381# include <sys/utsname.h>
382# include <sys/statfs.h> 397# include <sys/statfs.h>
383# include <sys/inotify.h> 398# include <sys/inotify.h>
384/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
385# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
386# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
403# define EFD_CLOEXEC O_CLOEXEC 418# define EFD_CLOEXEC O_CLOEXEC
404# else 419# else
405# define EFD_CLOEXEC 02000000 420# define EFD_CLOEXEC 02000000
406# endif 421# endif
407# endif 422# endif
408# ifdef __cplusplus
409extern "C" {
410# endif
411int (eventfd) (unsigned int initval, int flags); 423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
412# ifdef __cplusplus
413}
414# endif
415#endif 424#endif
416 425
417#if EV_USE_SIGNALFD 426#if EV_USE_SIGNALFD
418/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
419# include <stdint.h> 428# include <stdint.h>
… …
425# define SFD_CLOEXEC O_CLOEXEC 434# define SFD_CLOEXEC O_CLOEXEC
426# else 435# else
427# define SFD_CLOEXEC 02000000 436# define SFD_CLOEXEC 02000000
428# endif 437# endif
429# endif 438# endif
430# ifdef __cplusplus
431extern "C" {
432# endif
433int signalfd (int fd, const sigset_t *mask, int flags); 439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
434 440
435struct signalfd_siginfo 441struct signalfd_siginfo
436{ 442{
437 uint32_t ssi_signo; 443 uint32_t ssi_signo;
438 char pad[128 - sizeof (uint32_t)]; 444 char pad[128 - sizeof (uint32_t)];
439}; 445};
440# ifdef __cplusplus
441}
442# endif 446#endif
443#endif
444
445 447
446/**/ 448/**/
447 449
448#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
449# define EV_FREQUENT_CHECK ev_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
450#else 452#else
451# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
452#endif 454#endif
453 455
454/* 456/*
455 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
456 * It is added to ev_rt_now when scheduling periodics
457 * to ensure progress, time-wise, even when rounding
458 * errors are against us.
459 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
460 * Better solutions welcome.
461 */ 459 */
462#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
463 462
464#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
465#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
466 468
467#if __GNUC__ >= 4 469#if __GNUC__ >= 4
468# define expect(expr,value) __builtin_expect ((expr),(value)) 470# define expect(expr,value) __builtin_expect ((expr),(value))
469# define noinline __attribute__ ((noinline)) 471# define noinline __attribute__ ((noinline))
470#else 472#else
… …
503#define ev_active(w) ((W)(w))->active 505#define ev_active(w) ((W)(w))->active
504#define ev_at(w) ((WT)(w))->at 506#define ev_at(w) ((WT)(w))->at
505 507
506#if EV_USE_REALTIME 508#if EV_USE_REALTIME
507/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 509/* sig_atomic_t is used to avoid per-thread variables or locking but still */
508/* giving it a reasonably high chance of working on typical architetcures */ 510/* giving it a reasonably high chance of working on typical architectures */
509static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 511static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
510#endif 512#endif
511 513
512#if EV_USE_MONOTONIC 514#if EV_USE_MONOTONIC
513static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 515static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
524#endif 526#endif
525 527
526#ifdef _WIN32 528#ifdef _WIN32
527# include "ev_win32.c" 529# include "ev_win32.c"
528#endif 530#endif
531
532/*****************************************************************************/
533
534/* define a suitable floor function (only used by periodics atm) */
535
536#if EV_USE_FLOOR
537# include <math.h>
538# define ev_floor(v) floor (v)
539#else
540
541#include <float.h>
542
543/* a floor() replacement function, should be independent of ev_tstamp type */
544static ev_tstamp noinline
545ev_floor (ev_tstamp v)
546{
547 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif
553
554 /* argument too large for an unsigned long? */
555 if (expect_false (v >= shift))
556 {
557 ev_tstamp f;
558
559 if (v == v - 1.)
560 return v; /* very large number */
561
562 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f);
564 }
565
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */
575 return (unsigned long)v;
576}
577
578#endif
579
580/*****************************************************************************/
581
582#ifdef __linux
583# include <sys/utsname.h>
584#endif
585
586static unsigned int noinline
587ev_linux_version (void)
588{
589#ifdef __linux
590 unsigned int v = 0;
591 struct utsname buf;
592 int i;
593 char *p = buf.release;
594
595 if (uname (&buf))
596 return 0;
597
598 for (i = 3+1; --i; )
599 {
600 unsigned int c = 0;
601
602 for (;;)
603 {
604 if (*p >= '0' && *p <= '9')
605 c = c * 10 + *p++ - '0';
606 else
607 {
608 p += *p == '.';
609 break;
610 }
611 }
612
613 v = (v << 8) | c;
614 }
615
616 return v;
617#else
618 return 0;
619#endif
620}
529 621
530/*****************************************************************************/ 622/*****************************************************************************/
531 623
532#if EV_AVOID_STDIO 624#if EV_AVOID_STDIO
533static void noinline 625static void noinline
… …
554 if (syserr_cb) 646 if (syserr_cb)
555 syserr_cb (msg); 647 syserr_cb (msg);
556 else 648 else
557 { 649 {
558#if EV_AVOID_STDIO 650#if EV_AVOID_STDIO
559 const char *err = strerror (errno);
560
561 ev_printerr (msg); 651 ev_printerr (msg);
562 ev_printerr (": "); 652 ev_printerr (": ");
563 ev_printerr (err); 653 ev_printerr (strerror (errno));
564 ev_printerr ("\n"); 654 ev_printerr ("\n");
565#else 655#else
566 perror (msg); 656 perror (msg);
567#endif 657#endif
568 abort (); 658 abort ();
… …
602 ptr = alloc (ptr, size); 692 ptr = alloc (ptr, size);
603 693
604 if (!ptr && size) 694 if (!ptr && size)
605 { 695 {
606#if EV_AVOID_STDIO 696#if EV_AVOID_STDIO
607 ev_printerr ("libev: memory allocation failed, aborting.\n"); 697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
608#else 698#else
609 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
610#endif 700#endif
611 abort (); 701 abort ();
612 } 702 }
613 703
614 return ptr; 704 return ptr;
… …
631 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 721 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
632 unsigned char unused; 722 unsigned char unused;
633#if EV_USE_EPOLL 723#if EV_USE_EPOLL
634 unsigned int egen; /* generation counter to counter epoll bugs */ 724 unsigned int egen; /* generation counter to counter epoll bugs */
635#endif 725#endif
636#if EV_SELECT_IS_WINSOCKET 726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
637 SOCKET handle; 727 SOCKET handle;
728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
638#endif 731#endif
639} ANFD; 732} ANFD;
640 733
641/* stores the pending event set for a given watcher */ 734/* stores the pending event set for a given watcher */
642typedef struct 735typedef struct
… …
707# define EV_RELEASE_CB (void)0 800# define EV_RELEASE_CB (void)0
708# define EV_ACQUIRE_CB (void)0 801# define EV_ACQUIRE_CB (void)0
709# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 802# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
710#endif 803#endif
711 804
712#define EVUNLOOP_RECURSE 0x80 805#define EVBREAK_RECURSE 0x80
713 806
714/*****************************************************************************/ 807/*****************************************************************************/
715 808
716#ifndef EV_HAVE_EV_TIME 809#ifndef EV_HAVE_EV_TIME
717ev_tstamp 810ev_tstamp
… …
761 if (delay > 0.) 854 if (delay > 0.)
762 { 855 {
763#if EV_USE_NANOSLEEP 856#if EV_USE_NANOSLEEP
764 struct timespec ts; 857 struct timespec ts;
765 858
766 ts.tv_sec = (time_t)delay; 859 EV_TS_SET (ts, delay);
767 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
768
769 nanosleep (&ts, 0); 860 nanosleep (&ts, 0);
770#elif defined(_WIN32) 861#elif defined(_WIN32)
771 Sleep ((unsigned long)(delay * 1e3)); 862 Sleep ((unsigned long)(delay * 1e3));
772#else 863#else
773 struct timeval tv; 864 struct timeval tv;
774 865
775 tv.tv_sec = (time_t)delay;
776 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
777
778 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 866 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
779 /* something not guaranteed by newer posix versions, but guaranteed */ 867 /* something not guaranteed by newer posix versions, but guaranteed */
780 /* by older ones */ 868 /* by older ones */
869 EV_TV_SET (tv, delay);
781 select (0, 0, 0, 0, &tv); 870 select (0, 0, 0, 0, &tv);
782#endif 871#endif
783 } 872 }
784} 873}
785 874
786/*****************************************************************************/ 875/*****************************************************************************/
787 876
788#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 877#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
789 878
790/* find a suitable new size for the given array, */ 879/* find a suitable new size for the given array, */
791/* hopefully by rounding to a ncie-to-malloc size */ 880/* hopefully by rounding to a nice-to-malloc size */
792inline_size int 881inline_size int
793array_nextsize (int elem, int cur, int cnt) 882array_nextsize (int elem, int cur, int cnt)
794{ 883{
795 int ncur = cur + 1; 884 int ncur = cur + 1;
796 885
… …
931inline_size void 1020inline_size void
932fd_reify (EV_P) 1021fd_reify (EV_P)
933{ 1022{
934 int i; 1023 int i;
935 1024
1025#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1026 for (i = 0; i < fdchangecnt; ++i)
1027 {
1028 int fd = fdchanges [i];
1029 ANFD *anfd = anfds + fd;
1030
1031 if (anfd->reify & EV__IOFDSET && anfd->head)
1032 {
1033 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1034
1035 if (handle != anfd->handle)
1036 {
1037 unsigned long arg;
1038
1039 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1040
1041 /* handle changed, but fd didn't - we need to do it in two steps */
1042 backend_modify (EV_A_ fd, anfd->events, 0);
1043 anfd->events = 0;
1044 anfd->handle = handle;
1045 }
1046 }
1047 }
1048#endif
1049
936 for (i = 0; i < fdchangecnt; ++i) 1050 for (i = 0; i < fdchangecnt; ++i)
937 { 1051 {
938 int fd = fdchanges [i]; 1052 int fd = fdchanges [i];
939 ANFD *anfd = anfds + fd; 1053 ANFD *anfd = anfds + fd;
940 ev_io *w; 1054 ev_io *w;
941 1055
942 unsigned char events = 0; 1056 unsigned char o_events = anfd->events;
1057 unsigned char o_reify = anfd->reify;
943 1058
944 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1059 anfd->reify = 0;
945 events |= (unsigned char)w->events;
946 1060
947#if EV_SELECT_IS_WINSOCKET 1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
948 if (events)
949 { 1062 {
950 unsigned long arg; 1063 anfd->events = 0;
951 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1064
952 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1065 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1066 anfd->events |= (unsigned char)w->events;
1067
1068 if (o_events != anfd->events)
1069 o_reify = EV__IOFDSET; /* actually |= */
953 } 1070 }
954#endif
955 1071
956 { 1072 if (o_reify & EV__IOFDSET)
957 unsigned char o_events = anfd->events;
958 unsigned char o_reify = anfd->reify;
959
960 anfd->reify = 0;
961 anfd->events = events;
962
963 if (o_events != events || o_reify & EV__IOFDSET)
964 backend_modify (EV_A_ fd, o_events, events); 1073 backend_modify (EV_A_ fd, o_events, anfd->events);
965 }
966 } 1074 }
967 1075
968 fdchangecnt = 0; 1076 fdchangecnt = 0;
969} 1077}
970 1078
… …
1063} 1171}
1064 1172
1065/*****************************************************************************/ 1173/*****************************************************************************/
1066 1174
1067/* 1175/*
1068 * the heap functions want a real array index. array index 0 uis guaranteed to not 1176 * the heap functions want a real array index. array index 0 is guaranteed to not
1069 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1177 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1070 * the branching factor of the d-tree. 1178 * the branching factor of the d-tree.
1071 */ 1179 */
1072 1180
1073/* 1181/*
… …
1260inline_size void 1368inline_size void
1261evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1369evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1262{ 1370{
1263 if (!*flag) 1371 if (!*flag)
1264 { 1372 {
1265 int old_errno = errno; /* save errno because write might clobber it */
1266 char dummy;
1267
1268 *flag = 1; 1373 *flag = 1;
1269 1374
1375 pipe_write_skipped = 1;
1376
1377 if (pipe_write_wanted)
1378 {
1379 int old_errno = errno; /* save errno because write will clobber it */
1380 char dummy;
1381
1382 pipe_write_skipped = 0;
1383
1270#if EV_USE_EVENTFD 1384#if EV_USE_EVENTFD
1271 if (evfd >= 0) 1385 if (evfd >= 0)
1272 { 1386 {
1273 uint64_t counter = 1; 1387 uint64_t counter = 1;
1274 write (evfd, &counter, sizeof (uint64_t)); 1388 write (evfd, &counter, sizeof (uint64_t));
1389 }
1390 else
1391#endif
1392 {
1393 /* win32 people keep sending patches that change this write() to send() */
1394 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1395 /* so when you think this write should be a send instead, please find out */
1396 /* where your send() is from - it's definitely not the microsoft send, and */
1397 /* tell me. thank you. */
1398 write (evpipe [1], &dummy, 1);
1399 }
1400
1401 errno = old_errno;
1275 } 1402 }
1276 else
1277#endif
1278 write (evpipe [1], &dummy, 1);
1279
1280 errno = old_errno;
1281 } 1403 }
1282} 1404}
1283 1405
1284/* called whenever the libev signal pipe */ 1406/* called whenever the libev signal pipe */
1285/* got some events (signal, async) */ 1407/* got some events (signal, async) */
1286static void 1408static void
1287pipecb (EV_P_ ev_io *iow, int revents) 1409pipecb (EV_P_ ev_io *iow, int revents)
1288{ 1410{
1289 int i; 1411 int i;
1290 1412
1413 if (revents & EV_READ)
1414 {
1291#if EV_USE_EVENTFD 1415#if EV_USE_EVENTFD
1292 if (evfd >= 0) 1416 if (evfd >= 0)
1293 { 1417 {
1294 uint64_t counter; 1418 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 1419 read (evfd, &counter, sizeof (uint64_t));
1296 } 1420 }
1297 else 1421 else
1298#endif 1422#endif
1299 { 1423 {
1300 char dummy; 1424 char dummy;
1425 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1301 read (evpipe [0], &dummy, 1); 1426 read (evpipe [0], &dummy, 1);
1427 }
1302 } 1428 }
1303 1429
1430 pipe_write_skipped = 0;
1431
1432#if EV_SIGNAL_ENABLE
1304 if (sig_pending) 1433 if (sig_pending)
1305 { 1434 {
1306 sig_pending = 0; 1435 sig_pending = 0;
1307 1436
1308 for (i = EV_NSIG - 1; i--; ) 1437 for (i = EV_NSIG - 1; i--; )
1309 if (expect_false (signals [i].pending)) 1438 if (expect_false (signals [i].pending))
1310 ev_feed_signal_event (EV_A_ i + 1); 1439 ev_feed_signal_event (EV_A_ i + 1);
1311 } 1440 }
1441#endif
1312 1442
1313#if EV_ASYNC_ENABLE 1443#if EV_ASYNC_ENABLE
1314 if (async_pending) 1444 if (async_pending)
1315 { 1445 {
1316 async_pending = 0; 1446 async_pending = 0;
… …
1325#endif 1455#endif
1326} 1456}
1327 1457
1328/*****************************************************************************/ 1458/*****************************************************************************/
1329 1459
1460void
1461ev_feed_signal (int signum)
1462{
1463#if EV_MULTIPLICITY
1464 EV_P = signals [signum - 1].loop;
1465
1466 if (!EV_A)
1467 return;
1468#endif
1469
1470 evpipe_init (EV_A);
1471
1472 signals [signum - 1].pending = 1;
1473 evpipe_write (EV_A_ &sig_pending);
1474}
1475
1330static void 1476static void
1331ev_sighandler (int signum) 1477ev_sighandler (int signum)
1332{ 1478{
1333#if EV_MULTIPLICITY
1334 EV_P = signals [signum - 1].loop;
1335#endif
1336
1337#ifdef _WIN32 1479#ifdef _WIN32
1338 signal (signum, ev_sighandler); 1480 signal (signum, ev_sighandler);
1339#endif 1481#endif
1340 1482
1341 signals [signum - 1].pending = 1; 1483 ev_feed_signal (signum);
1342 evpipe_write (EV_A_ &sig_pending);
1343} 1484}
1344 1485
1345void noinline 1486void noinline
1346ev_feed_signal_event (EV_P_ int signum) 1487ev_feed_signal_event (EV_P_ int signum)
1347{ 1488{
… …
1447 1588
1448#endif 1589#endif
1449 1590
1450/*****************************************************************************/ 1591/*****************************************************************************/
1451 1592
1593#if EV_USE_IOCP
1594# include "ev_iocp.c"
1595#endif
1452#if EV_USE_PORT 1596#if EV_USE_PORT
1453# include "ev_port.c" 1597# include "ev_port.c"
1454#endif 1598#endif
1455#if EV_USE_KQUEUE 1599#if EV_USE_KQUEUE
1456# include "ev_kqueue.c" 1600# include "ev_kqueue.c"
… …
1529ev_embeddable_backends (void) 1673ev_embeddable_backends (void)
1530{ 1674{
1531 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1675 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1532 1676
1533 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1677 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1534 /* please fix it and tell me how to detect the fix */ 1678 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1535 flags &= ~EVBACKEND_EPOLL; 1679 flags &= ~EVBACKEND_EPOLL;
1536 1680
1537 return flags; 1681 return flags;
1538} 1682}
1539 1683
1540unsigned int 1684unsigned int
… …
1596static void noinline 1740static void noinline
1597loop_init (EV_P_ unsigned int flags) 1741loop_init (EV_P_ unsigned int flags)
1598{ 1742{
1599 if (!backend) 1743 if (!backend)
1600 { 1744 {
1745 origflags = flags;
1746
1601#if EV_USE_REALTIME 1747#if EV_USE_REALTIME
1602 if (!have_realtime) 1748 if (!have_realtime)
1603 { 1749 {
1604 struct timespec ts; 1750 struct timespec ts;
1605 1751
… …
1627 if (!(flags & EVFLAG_NOENV) 1773 if (!(flags & EVFLAG_NOENV)
1628 && !enable_secure () 1774 && !enable_secure ()
1629 && getenv ("LIBEV_FLAGS")) 1775 && getenv ("LIBEV_FLAGS"))
1630 flags = atoi (getenv ("LIBEV_FLAGS")); 1776 flags = atoi (getenv ("LIBEV_FLAGS"));
1631 1777
1632 ev_rt_now = ev_time (); 1778 ev_rt_now = ev_time ();
1633 mn_now = get_clock (); 1779 mn_now = get_clock ();
1634 now_floor = mn_now; 1780 now_floor = mn_now;
1635 rtmn_diff = ev_rt_now - mn_now; 1781 rtmn_diff = ev_rt_now - mn_now;
1636#if EV_FEATURE_API 1782#if EV_FEATURE_API
1637 invoke_cb = ev_invoke_pending; 1783 invoke_cb = ev_invoke_pending;
1638#endif 1784#endif
1639 1785
1640 io_blocktime = 0.; 1786 io_blocktime = 0.;
1641 timeout_blocktime = 0.; 1787 timeout_blocktime = 0.;
1642 backend = 0; 1788 backend = 0;
1643 backend_fd = -1; 1789 backend_fd = -1;
1644 sig_pending = 0; 1790 sig_pending = 0;
1645#if EV_ASYNC_ENABLE 1791#if EV_ASYNC_ENABLE
1646 async_pending = 0; 1792 async_pending = 0;
1647#endif 1793#endif
1794 pipe_write_skipped = 0;
1795 pipe_write_wanted = 0;
1648#if EV_USE_INOTIFY 1796#if EV_USE_INOTIFY
1649 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 1797 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1650#endif 1798#endif
1651#if EV_USE_SIGNALFD 1799#if EV_USE_SIGNALFD
1652 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1800 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1653#endif 1801#endif
1654 1802
1655 if (!(flags & 0x0000ffffU)) 1803 if (!(flags & EVBACKEND_MASK))
1656 flags |= ev_recommended_backends (); 1804 flags |= ev_recommended_backends ();
1657 1805
1806#if EV_USE_IOCP
1807 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1808#endif
1658#if EV_USE_PORT 1809#if EV_USE_PORT
1659 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1810 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1660#endif 1811#endif
1661#if EV_USE_KQUEUE 1812#if EV_USE_KQUEUE
1662 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1813 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1679#endif 1830#endif
1680 } 1831 }
1681} 1832}
1682 1833
1683/* free up a loop structure */ 1834/* free up a loop structure */
1684static void noinline 1835void
1685loop_destroy (EV_P) 1836ev_loop_destroy (EV_P)
1686{ 1837{
1687 int i; 1838 int i;
1839
1840#if EV_MULTIPLICITY
1841 /* mimic free (0) */
1842 if (!EV_A)
1843 return;
1844#endif
1845
1846#if EV_CLEANUP_ENABLE
1847 /* queue cleanup watchers (and execute them) */
1848 if (expect_false (cleanupcnt))
1849 {
1850 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1851 EV_INVOKE_PENDING;
1852 }
1853#endif
1854
1855#if EV_CHILD_ENABLE
1856 if (ev_is_active (&childev))
1857 {
1858 ev_ref (EV_A); /* child watcher */
1859 ev_signal_stop (EV_A_ &childev);
1860 }
1861#endif
1688 1862
1689 if (ev_is_active (&pipe_w)) 1863 if (ev_is_active (&pipe_w))
1690 { 1864 {
1691 /*ev_ref (EV_A);*/ 1865 /*ev_ref (EV_A);*/
1692 /*ev_io_stop (EV_A_ &pipe_w);*/ 1866 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1714#endif 1888#endif
1715 1889
1716 if (backend_fd >= 0) 1890 if (backend_fd >= 0)
1717 close (backend_fd); 1891 close (backend_fd);
1718 1892
1893#if EV_USE_IOCP
1894 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1895#endif
1719#if EV_USE_PORT 1896#if EV_USE_PORT
1720 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1897 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1721#endif 1898#endif
1722#if EV_USE_KQUEUE 1899#if EV_USE_KQUEUE
1723 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1900 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1750 array_free (periodic, EMPTY); 1927 array_free (periodic, EMPTY);
1751#endif 1928#endif
1752#if EV_FORK_ENABLE 1929#if EV_FORK_ENABLE
1753 array_free (fork, EMPTY); 1930 array_free (fork, EMPTY);
1754#endif 1931#endif
1932#if EV_CLEANUP_ENABLE
1933 array_free (cleanup, EMPTY);
1934#endif
1755 array_free (prepare, EMPTY); 1935 array_free (prepare, EMPTY);
1756 array_free (check, EMPTY); 1936 array_free (check, EMPTY);
1757#if EV_ASYNC_ENABLE 1937#if EV_ASYNC_ENABLE
1758 array_free (async, EMPTY); 1938 array_free (async, EMPTY);
1759#endif 1939#endif
1760 1940
1761 backend = 0; 1941 backend = 0;
1942
1943#if EV_MULTIPLICITY
1944 if (ev_is_default_loop (EV_A))
1945#endif
1946 ev_default_loop_ptr = 0;
1947#if EV_MULTIPLICITY
1948 else
1949 ev_free (EV_A);
1950#endif
1762} 1951}
1763 1952
1764#if EV_USE_INOTIFY 1953#if EV_USE_INOTIFY
1765inline_size void infy_fork (EV_P); 1954inline_size void infy_fork (EV_P);
1766#endif 1955#endif
… …
1781 infy_fork (EV_A); 1970 infy_fork (EV_A);
1782#endif 1971#endif
1783 1972
1784 if (ev_is_active (&pipe_w)) 1973 if (ev_is_active (&pipe_w))
1785 { 1974 {
1786 /* this "locks" the handlers against writing to the pipe */ 1975 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1787 /* while we modify the fd vars */
1788 sig_pending = 1;
1789#if EV_ASYNC_ENABLE
1790 async_pending = 1;
1791#endif
1792 1976
1793 ev_ref (EV_A); 1977 ev_ref (EV_A);
1794 ev_io_stop (EV_A_ &pipe_w); 1978 ev_io_stop (EV_A_ &pipe_w);
1795 1979
1796#if EV_USE_EVENTFD 1980#if EV_USE_EVENTFD
… …
1825 loop_init (EV_A_ flags); 2009 loop_init (EV_A_ flags);
1826 2010
1827 if (ev_backend (EV_A)) 2011 if (ev_backend (EV_A))
1828 return EV_A; 2012 return EV_A;
1829 2013
2014 ev_free (EV_A);
1830 return 0; 2015 return 0;
1831} 2016}
1832 2017
1833void
1834ev_loop_destroy (EV_P)
1835{
1836 loop_destroy (EV_A);
1837 ev_free (loop);
1838}
1839
1840void
1841ev_loop_fork (EV_P)
1842{
1843 postfork = 1; /* must be in line with ev_default_fork */
1844}
1845#endif /* multiplicity */ 2018#endif /* multiplicity */
1846 2019
1847#if EV_VERIFY 2020#if EV_VERIFY
1848static void noinline 2021static void noinline
1849verify_watcher (EV_P_ W w) 2022verify_watcher (EV_P_ W w)
… …
1924#if EV_FORK_ENABLE 2097#if EV_FORK_ENABLE
1925 assert (forkmax >= forkcnt); 2098 assert (forkmax >= forkcnt);
1926 array_verify (EV_A_ (W *)forks, forkcnt); 2099 array_verify (EV_A_ (W *)forks, forkcnt);
1927#endif 2100#endif
1928 2101
2102#if EV_CLEANUP_ENABLE
2103 assert (cleanupmax >= cleanupcnt);
2104 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2105#endif
2106
1929#if EV_ASYNC_ENABLE 2107#if EV_ASYNC_ENABLE
1930 assert (asyncmax >= asynccnt); 2108 assert (asyncmax >= asynccnt);
1931 array_verify (EV_A_ (W *)asyncs, asynccnt); 2109 array_verify (EV_A_ (W *)asyncs, asynccnt);
1932#endif 2110#endif
1933 2111
… …
1951} 2129}
1952#endif 2130#endif
1953 2131
1954#if EV_MULTIPLICITY 2132#if EV_MULTIPLICITY
1955struct ev_loop * 2133struct ev_loop *
1956ev_default_loop_init (unsigned int flags)
1957#else 2134#else
1958int 2135int
2136#endif
1959ev_default_loop (unsigned int flags) 2137ev_default_loop (unsigned int flags)
1960#endif
1961{ 2138{
1962 if (!ev_default_loop_ptr) 2139 if (!ev_default_loop_ptr)
1963 { 2140 {
1964#if EV_MULTIPLICITY 2141#if EV_MULTIPLICITY
1965 EV_P = ev_default_loop_ptr = &default_loop_struct; 2142 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1984 2161
1985 return ev_default_loop_ptr; 2162 return ev_default_loop_ptr;
1986} 2163}
1987 2164
1988void 2165void
1989ev_default_destroy (void) 2166ev_loop_fork (EV_P)
1990{ 2167{
1991#if EV_MULTIPLICITY
1992 EV_P = ev_default_loop_ptr;
1993#endif
1994
1995 ev_default_loop_ptr = 0;
1996
1997#if EV_CHILD_ENABLE
1998 ev_ref (EV_A); /* child watcher */
1999 ev_signal_stop (EV_A_ &childev);
2000#endif
2001
2002 loop_destroy (EV_A);
2003}
2004
2005void
2006ev_default_fork (void)
2007{
2008#if EV_MULTIPLICITY
2009 EV_P = ev_default_loop_ptr;
2010#endif
2011
2012 postfork = 1; /* must be in line with ev_loop_fork */ 2168 postfork = 1; /* must be in line with ev_default_fork */
2013} 2169}
2014 2170
2015/*****************************************************************************/ 2171/*****************************************************************************/
2016 2172
2017void 2173void
… …
2039 2195
2040 for (pri = NUMPRI; pri--; ) 2196 for (pri = NUMPRI; pri--; )
2041 while (pendingcnt [pri]) 2197 while (pendingcnt [pri])
2042 { 2198 {
2043 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2199 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2044
2045 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2046 /* ^ this is no longer true, as pending_w could be here */
2047 2200
2048 p->w->pending = 0; 2201 p->w->pending = 0;
2049 EV_CB_INVOKE (p->w, p->events); 2202 EV_CB_INVOKE (p->w, p->events);
2050 EV_FREQUENT_CHECK; 2203 EV_FREQUENT_CHECK;
2051 } 2204 }
… …
2113 feed_reverse_done (EV_A_ EV_TIMER); 2266 feed_reverse_done (EV_A_ EV_TIMER);
2114 } 2267 }
2115} 2268}
2116 2269
2117#if EV_PERIODIC_ENABLE 2270#if EV_PERIODIC_ENABLE
2271
2272static void noinline
2273periodic_recalc (EV_P_ ev_periodic *w)
2274{
2275 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2276 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2277
2278 /* the above almost always errs on the low side */
2279 while (at <= ev_rt_now)
2280 {
2281 ev_tstamp nat = at + w->interval;
2282
2283 /* when resolution fails us, we use ev_rt_now */
2284 if (expect_false (nat == at))
2285 {
2286 at = ev_rt_now;
2287 break;
2288 }
2289
2290 at = nat;
2291 }
2292
2293 ev_at (w) = at;
2294}
2295
2118/* make periodics pending */ 2296/* make periodics pending */
2119inline_size void 2297inline_size void
2120periodics_reify (EV_P) 2298periodics_reify (EV_P)
2121{ 2299{
2122 EV_FREQUENT_CHECK; 2300 EV_FREQUENT_CHECK;
… …
2141 ANHE_at_cache (periodics [HEAP0]); 2319 ANHE_at_cache (periodics [HEAP0]);
2142 downheap (periodics, periodiccnt, HEAP0); 2320 downheap (periodics, periodiccnt, HEAP0);
2143 } 2321 }
2144 else if (w->interval) 2322 else if (w->interval)
2145 { 2323 {
2146 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2324 periodic_recalc (EV_A_ w);
2147 /* if next trigger time is not sufficiently in the future, put it there */
2148 /* this might happen because of floating point inexactness */
2149 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2150 {
2151 ev_at (w) += w->interval;
2152
2153 /* if interval is unreasonably low we might still have a time in the past */
2154 /* so correct this. this will make the periodic very inexact, but the user */
2155 /* has effectively asked to get triggered more often than possible */
2156 if (ev_at (w) < ev_rt_now)
2157 ev_at (w) = ev_rt_now;
2158 }
2159
2160 ANHE_at_cache (periodics [HEAP0]); 2325 ANHE_at_cache (periodics [HEAP0]);
2161 downheap (periodics, periodiccnt, HEAP0); 2326 downheap (periodics, periodiccnt, HEAP0);
2162 } 2327 }
2163 else 2328 else
2164 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2329 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2171 feed_reverse_done (EV_A_ EV_PERIODIC); 2336 feed_reverse_done (EV_A_ EV_PERIODIC);
2172 } 2337 }
2173} 2338}
2174 2339
2175/* simply recalculate all periodics */ 2340/* simply recalculate all periodics */
2176/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2341/* TODO: maybe ensure that at least one event happens when jumping forward? */
2177static void noinline 2342static void noinline
2178periodics_reschedule (EV_P) 2343periodics_reschedule (EV_P)
2179{ 2344{
2180 int i; 2345 int i;
2181 2346
… …
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2350 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2186 2351
2187 if (w->reschedule_cb) 2352 if (w->reschedule_cb)
2188 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2353 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2189 else if (w->interval) 2354 else if (w->interval)
2190 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2355 periodic_recalc (EV_A_ w);
2191 2356
2192 ANHE_at_cache (periodics [i]); 2357 ANHE_at_cache (periodics [i]);
2193 } 2358 }
2194 2359
2195 reheap (periodics, periodiccnt); 2360 reheap (periodics, periodiccnt);
… …
2242 * doesn't hurt either as we only do this on time-jumps or 2407 * doesn't hurt either as we only do this on time-jumps or
2243 * in the unlikely event of having been preempted here. 2408 * in the unlikely event of having been preempted here.
2244 */ 2409 */
2245 for (i = 4; --i; ) 2410 for (i = 4; --i; )
2246 { 2411 {
2412 ev_tstamp diff;
2247 rtmn_diff = ev_rt_now - mn_now; 2413 rtmn_diff = ev_rt_now - mn_now;
2248 2414
2415 diff = odiff - rtmn_diff;
2416
2249 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2417 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2250 return; /* all is well */ 2418 return; /* all is well */
2251 2419
2252 ev_rt_now = ev_time (); 2420 ev_rt_now = ev_time ();
2253 mn_now = get_clock (); 2421 mn_now = get_clock ();
2254 now_floor = mn_now; 2422 now_floor = mn_now;
… …
2277 mn_now = ev_rt_now; 2445 mn_now = ev_rt_now;
2278 } 2446 }
2279} 2447}
2280 2448
2281void 2449void
2282ev_loop (EV_P_ int flags) 2450ev_run (EV_P_ int flags)
2283{ 2451{
2284#if EV_FEATURE_API 2452#if EV_FEATURE_API
2285 ++loop_depth; 2453 ++loop_depth;
2286#endif 2454#endif
2287 2455
2288 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2456 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2289 2457
2290 loop_done = EVUNLOOP_CANCEL; 2458 loop_done = EVBREAK_CANCEL;
2291 2459
2292 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2460 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2293 2461
2294 do 2462 do
2295 { 2463 {
… …
2338 /* calculate blocking time */ 2506 /* calculate blocking time */
2339 { 2507 {
2340 ev_tstamp waittime = 0.; 2508 ev_tstamp waittime = 0.;
2341 ev_tstamp sleeptime = 0.; 2509 ev_tstamp sleeptime = 0.;
2342 2510
2511 /* remember old timestamp for io_blocktime calculation */
2512 ev_tstamp prev_mn_now = mn_now;
2513
2514 /* update time to cancel out callback processing overhead */
2515 time_update (EV_A_ 1e100);
2516
2517 /* from now on, we want a pipe-wake-up */
2518 pipe_write_wanted = 1;
2519
2343 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2520 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2344 { 2521 {
2345 /* remember old timestamp for io_blocktime calculation */
2346 ev_tstamp prev_mn_now = mn_now;
2347
2348 /* update time to cancel out callback processing overhead */
2349 time_update (EV_A_ 1e100);
2350
2351 waittime = MAX_BLOCKTIME; 2522 waittime = MAX_BLOCKTIME;
2352 2523
2353 if (timercnt) 2524 if (timercnt)
2354 { 2525 {
2355 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2526 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2356 if (waittime > to) waittime = to; 2527 if (waittime > to) waittime = to;
2357 } 2528 }
2358 2529
2359#if EV_PERIODIC_ENABLE 2530#if EV_PERIODIC_ENABLE
2360 if (periodiccnt) 2531 if (periodiccnt)
2361 { 2532 {
2362 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2533 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2363 if (waittime > to) waittime = to; 2534 if (waittime > to) waittime = to;
2364 } 2535 }
2365#endif 2536#endif
2366 2537
2367 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2538 /* don't let timeouts decrease the waittime below timeout_blocktime */
2368 if (expect_false (waittime < timeout_blocktime)) 2539 if (expect_false (waittime < timeout_blocktime))
2369 waittime = timeout_blocktime; 2540 waittime = timeout_blocktime;
2541
2542 /* at this point, we NEED to wait, so we have to ensure */
2543 /* to pass a minimum nonzero value to the backend */
2544 if (expect_false (waittime < backend_mintime))
2545 waittime = backend_mintime;
2370 2546
2371 /* extra check because io_blocktime is commonly 0 */ 2547 /* extra check because io_blocktime is commonly 0 */
2372 if (expect_false (io_blocktime)) 2548 if (expect_false (io_blocktime))
2373 { 2549 {
2374 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2550 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2375 2551
2376 if (sleeptime > waittime - backend_fudge) 2552 if (sleeptime > waittime - backend_mintime)
2377 sleeptime = waittime - backend_fudge; 2553 sleeptime = waittime - backend_mintime;
2378 2554
2379 if (expect_true (sleeptime > 0.)) 2555 if (expect_true (sleeptime > 0.))
2380 { 2556 {
2381 ev_sleep (sleeptime); 2557 ev_sleep (sleeptime);
2382 waittime -= sleeptime; 2558 waittime -= sleeptime;
… …
2385 } 2561 }
2386 2562
2387#if EV_FEATURE_API 2563#if EV_FEATURE_API
2388 ++loop_count; 2564 ++loop_count;
2389#endif 2565#endif
2390 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2566 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2391 backend_poll (EV_A_ waittime); 2567 backend_poll (EV_A_ waittime);
2392 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2568 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2569
2570 pipe_write_wanted = 0;
2571
2572 if (pipe_write_skipped)
2573 {
2574 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2575 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2576 }
2577
2393 2578
2394 /* update ev_rt_now, do magic */ 2579 /* update ev_rt_now, do magic */
2395 time_update (EV_A_ waittime + sleeptime); 2580 time_update (EV_A_ waittime + sleeptime);
2396 } 2581 }
2397 2582
… …
2415 EV_INVOKE_PENDING; 2600 EV_INVOKE_PENDING;
2416 } 2601 }
2417 while (expect_true ( 2602 while (expect_true (
2418 activecnt 2603 activecnt
2419 && !loop_done 2604 && !loop_done
2420 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2605 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2421 )); 2606 ));
2422 2607
2423 if (loop_done == EVUNLOOP_ONE) 2608 if (loop_done == EVBREAK_ONE)
2424 loop_done = EVUNLOOP_CANCEL; 2609 loop_done = EVBREAK_CANCEL;
2425 2610
2426#if EV_FEATURE_API 2611#if EV_FEATURE_API
2427 --loop_depth; 2612 --loop_depth;
2428#endif 2613#endif
2429} 2614}
2430 2615
2431void 2616void
2432ev_unloop (EV_P_ int how) 2617ev_break (EV_P_ int how)
2433{ 2618{
2434 loop_done = how; 2619 loop_done = how;
2435} 2620}
2436 2621
2437void 2622void
… …
2585 EV_FREQUENT_CHECK; 2770 EV_FREQUENT_CHECK;
2586 2771
2587 wlist_del (&anfds[w->fd].head, (WL)w); 2772 wlist_del (&anfds[w->fd].head, (WL)w);
2588 ev_stop (EV_A_ (W)w); 2773 ev_stop (EV_A_ (W)w);
2589 2774
2590 fd_change (EV_A_ w->fd, 1); 2775 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2591 2776
2592 EV_FREQUENT_CHECK; 2777 EV_FREQUENT_CHECK;
2593} 2778}
2594 2779
2595void noinline 2780void noinline
… …
2687 if (w->reschedule_cb) 2872 if (w->reschedule_cb)
2688 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2873 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2689 else if (w->interval) 2874 else if (w->interval)
2690 { 2875 {
2691 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2876 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2692 /* this formula differs from the one in periodic_reify because we do not always round up */ 2877 periodic_recalc (EV_A_ w);
2693 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2694 } 2878 }
2695 else 2879 else
2696 ev_at (w) = w->offset; 2880 ev_at (w) = w->offset;
2697 2881
2698 EV_FREQUENT_CHECK; 2882 EV_FREQUENT_CHECK;
… …
2819 sa.sa_handler = ev_sighandler; 3003 sa.sa_handler = ev_sighandler;
2820 sigfillset (&sa.sa_mask); 3004 sigfillset (&sa.sa_mask);
2821 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3005 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2822 sigaction (w->signum, &sa, 0); 3006 sigaction (w->signum, &sa, 0);
2823 3007
3008 if (origflags & EVFLAG_NOSIGMASK)
3009 {
2824 sigemptyset (&sa.sa_mask); 3010 sigemptyset (&sa.sa_mask);
2825 sigaddset (&sa.sa_mask, w->signum); 3011 sigaddset (&sa.sa_mask, w->signum);
2826 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3012 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3013 }
2827#endif 3014#endif
2828 } 3015 }
2829 3016
2830 EV_FREQUENT_CHECK; 3017 EV_FREQUENT_CHECK;
2831} 3018}
… …
2972 if (!pend || pend == path) 3159 if (!pend || pend == path)
2973 break; 3160 break;
2974 3161
2975 *pend = 0; 3162 *pend = 0;
2976 w->wd = inotify_add_watch (fs_fd, path, mask); 3163 w->wd = inotify_add_watch (fs_fd, path, mask);
2977 } 3164 }
2978 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3165 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2979 } 3166 }
2980 } 3167 }
2981 3168
2982 if (w->wd >= 0) 3169 if (w->wd >= 0)
… …
3047 { 3234 {
3048 struct inotify_event *ev = (struct inotify_event *)(buf + ofs); 3235 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3049 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3236 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3050 ofs += sizeof (struct inotify_event) + ev->len; 3237 ofs += sizeof (struct inotify_event) + ev->len;
3051 } 3238 }
3052}
3053
3054inline_size unsigned int
3055ev_linux_version (void)
3056{
3057 struct utsname buf;
3058 unsigned int v;
3059 int i;
3060 char *p = buf.release;
3061
3062 if (uname (&buf))
3063 return 0;
3064
3065 for (i = 3+1; --i; )
3066 {
3067 unsigned int c = 0;
3068
3069 for (;;)
3070 {
3071 if (*p >= '0' && *p <= '9')
3072 c = c * 10 + *p++ - '0';
3073 else
3074 {
3075 p += *p == '.';
3076 break;
3077 }
3078 }
3079
3080 v = (v << 8) | c;
3081 }
3082
3083 return v;
3084} 3239}
3085 3240
3086inline_size void 3241inline_size void
3087ev_check_2625 (EV_P) 3242ev_check_2625 (EV_P)
3088{ 3243{
… …
3412 3567
3413#if EV_EMBED_ENABLE 3568#if EV_EMBED_ENABLE
3414void noinline 3569void noinline
3415ev_embed_sweep (EV_P_ ev_embed *w) 3570ev_embed_sweep (EV_P_ ev_embed *w)
3416{ 3571{
3417 ev_loop (w->other, EVLOOP_NONBLOCK); 3572 ev_run (w->other, EVRUN_NOWAIT);
3418} 3573}
3419 3574
3420static void 3575static void
3421embed_io_cb (EV_P_ ev_io *io, int revents) 3576embed_io_cb (EV_P_ ev_io *io, int revents)
3422{ 3577{
3423 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3578 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3424 3579
3425 if (ev_cb (w)) 3580 if (ev_cb (w))
3426 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3581 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3427 else 3582 else
3428 ev_loop (w->other, EVLOOP_NONBLOCK); 3583 ev_run (w->other, EVRUN_NOWAIT);
3429} 3584}
3430 3585
3431static void 3586static void
3432embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3587embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3433{ 3588{
… …
3437 EV_P = w->other; 3592 EV_P = w->other;
3438 3593
3439 while (fdchangecnt) 3594 while (fdchangecnt)
3440 { 3595 {
3441 fd_reify (EV_A); 3596 fd_reify (EV_A);
3442 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3597 ev_run (EV_A_ EVRUN_NOWAIT);
3443 } 3598 }
3444 } 3599 }
3445} 3600}
3446 3601
3447static void 3602static void
… …
3453 3608
3454 { 3609 {
3455 EV_P = w->other; 3610 EV_P = w->other;
3456 3611
3457 ev_loop_fork (EV_A); 3612 ev_loop_fork (EV_A);
3458 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3613 ev_run (EV_A_ EVRUN_NOWAIT);
3459 } 3614 }
3460 3615
3461 ev_embed_start (EV_A_ w); 3616 ev_embed_start (EV_A_ w);
3462} 3617}
3463 3618
… …
3555 3710
3556 EV_FREQUENT_CHECK; 3711 EV_FREQUENT_CHECK;
3557} 3712}
3558#endif 3713#endif
3559 3714
3560#if EV_ASYNC_ENABLE 3715#if EV_CLEANUP_ENABLE
3561void 3716void
3562ev_async_start (EV_P_ ev_async *w) 3717ev_cleanup_start (EV_P_ ev_cleanup *w)
3563{ 3718{
3564 if (expect_false (ev_is_active (w))) 3719 if (expect_false (ev_is_active (w)))
3565 return; 3720 return;
3721
3722 EV_FREQUENT_CHECK;
3723
3724 ev_start (EV_A_ (W)w, ++cleanupcnt);
3725 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3726 cleanups [cleanupcnt - 1] = w;
3727
3728 /* cleanup watchers should never keep a refcount on the loop */
3729 ev_unref (EV_A);
3730 EV_FREQUENT_CHECK;
3731}
3732
3733void
3734ev_cleanup_stop (EV_P_ ev_cleanup *w)
3735{
3736 clear_pending (EV_A_ (W)w);
3737 if (expect_false (!ev_is_active (w)))
3738 return;
3739
3740 EV_FREQUENT_CHECK;
3741 ev_ref (EV_A);
3742
3743 {
3744 int active = ev_active (w);
3745
3746 cleanups [active - 1] = cleanups [--cleanupcnt];
3747 ev_active (cleanups [active - 1]) = active;
3748 }
3749
3750 ev_stop (EV_A_ (W)w);
3751
3752 EV_FREQUENT_CHECK;
3753}
3754#endif
3755
3756#if EV_ASYNC_ENABLE
3757void
3758ev_async_start (EV_P_ ev_async *w)
3759{
3760 if (expect_false (ev_is_active (w)))
3761 return;
3762
3763 w->sent = 0;
3566 3764
3567 evpipe_init (EV_A); 3765 evpipe_init (EV_A);
3568 3766
3569 EV_FREQUENT_CHECK; 3767 EV_FREQUENT_CHECK;
3570 3768
… …
3790 3988
3791#if EV_MULTIPLICITY 3989#if EV_MULTIPLICITY
3792 #include "ev_wrap.h" 3990 #include "ev_wrap.h"
3793#endif 3991#endif
3794 3992
3795#ifdef __cplusplus 3993EV_CPP(})
3796}
3797#endif
3798 3994

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