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Comparing libev/ev.c (file contents):
Revision 1.248 by root, Wed May 21 23:25:21 2008 UTC vs.
Revision 1.305 by root, Sun Jul 19 03:49:04 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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 *
… …
47# include EV_CONFIG_H 47# include EV_CONFIG_H
48# else 48# else
49# include "config.h" 49# include "config.h"
50# endif 50# endif
51 51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
52# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
55# endif 69# endif
56# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
58# endif 72# endif
59# else 73# else
60# ifndef EV_USE_MONOTONIC 74# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 75# define EV_USE_MONOTONIC 0
62# endif 76# endif
… …
119# else 133# else
120# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
121# endif 135# endif
122# endif 136# endif
123 137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
124# ifndef EV_USE_EVENTFD 146# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD 147# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1 148# define EV_USE_EVENTFD 1
127# else 149# else
128# define EV_USE_EVENTFD 0 150# define EV_USE_EVENTFD 0
129# endif 151# endif
130# endif 152# endif
131 153
132#endif 154#endif
133 155
134#include <math.h> 156#include <math.h>
135#include <stdlib.h> 157#include <stdlib.h>
136#include <fcntl.h> 158#include <fcntl.h>
… …
154#ifndef _WIN32 176#ifndef _WIN32
155# include <sys/time.h> 177# include <sys/time.h>
156# include <sys/wait.h> 178# include <sys/wait.h>
157# include <unistd.h> 179# include <unistd.h>
158#else 180#else
181# include <io.h>
159# define WIN32_LEAN_AND_MEAN 182# define WIN32_LEAN_AND_MEAN
160# include <windows.h> 183# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 184# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 185# define EV_SELECT_IS_WINSOCKET 1
163# endif 186# endif
164#endif 187#endif
165 188
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 189/* this block tries to deduce configuration from header-defined symbols and defaults */
167 190
191/* try to deduce the maximum number of signals on this platform */
192#if defined (EV_NSIG)
193/* use what's provided */
194#elif defined (NSIG)
195# define EV_NSIG (NSIG)
196#elif defined(_NSIG)
197# define EV_NSIG (_NSIG)
198#elif defined (SIGMAX)
199# define EV_NSIG (SIGMAX+1)
200#elif defined (SIG_MAX)
201# define EV_NSIG (SIG_MAX+1)
202#elif defined (_SIG_MAX)
203# define EV_NSIG (_SIG_MAX+1)
204#elif defined (MAXSIG)
205# define EV_NSIG (MAXSIG+1)
206#elif defined (MAX_SIG)
207# define EV_NSIG (MAX_SIG+1)
208#elif defined (SIGARRAYSIZE)
209# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
210#elif defined (_sys_nsig)
211# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
212#else
213# error "unable to find value for NSIG, please report"
214/* to make it compile regardless, just remove the above line */
215# define EV_NSIG 64
216#endif
217
218/* Default to some arbitrary number that's big enough to get most
219 of the common signals.
220*/
221#ifndef NSIG
222# define NSIG 50
223#endif
224/* <-- NSIG logic from Configure */
225#ifndef EV_USE_CLOCK_SYSCALL
226# if __linux && __GLIBC__ >= 2
227# define EV_USE_CLOCK_SYSCALL 1
228# else
229# define EV_USE_CLOCK_SYSCALL 0
230# endif
231#endif
232
168#ifndef EV_USE_MONOTONIC 233#ifndef EV_USE_MONOTONIC
234# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
235# define EV_USE_MONOTONIC 1
236# else
169# define EV_USE_MONOTONIC 0 237# define EV_USE_MONOTONIC 0
238# endif
170#endif 239#endif
171 240
172#ifndef EV_USE_REALTIME 241#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 242# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 243#endif
175 244
176#ifndef EV_USE_NANOSLEEP 245#ifndef EV_USE_NANOSLEEP
246# if _POSIX_C_SOURCE >= 199309L
247# define EV_USE_NANOSLEEP 1
248# else
177# define EV_USE_NANOSLEEP 0 249# define EV_USE_NANOSLEEP 0
250# endif
178#endif 251#endif
179 252
180#ifndef EV_USE_SELECT 253#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 254# define EV_USE_SELECT 1
182#endif 255#endif
… …
235# else 308# else
236# define EV_USE_EVENTFD 0 309# define EV_USE_EVENTFD 0
237# endif 310# endif
238#endif 311#endif
239 312
313#ifndef EV_USE_SIGNALFD
314# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))
315# define EV_USE_SIGNALFD 1
316# else
317# define EV_USE_SIGNALFD 0
318# endif
319#endif
320
321#if 0 /* debugging */
322# define EV_VERIFY 3
323# define EV_USE_4HEAP 1
324# define EV_HEAP_CACHE_AT 1
325#endif
326
327#ifndef EV_VERIFY
328# define EV_VERIFY !EV_MINIMAL
329#endif
330
240#ifndef EV_USE_4HEAP 331#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL 332# define EV_USE_4HEAP !EV_MINIMAL
242#endif 333#endif
243 334
244#ifndef EV_HEAP_CACHE_AT 335#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL 336# define EV_HEAP_CACHE_AT !EV_MINIMAL
337#endif
338
339/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
340/* which makes programs even slower. might work on other unices, too. */
341#if EV_USE_CLOCK_SYSCALL
342# include <syscall.h>
343# ifdef SYS_clock_gettime
344# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
345# undef EV_USE_MONOTONIC
346# define EV_USE_MONOTONIC 1
347# else
348# undef EV_USE_CLOCK_SYSCALL
349# define EV_USE_CLOCK_SYSCALL 0
350# endif
246#endif 351#endif
247 352
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 353/* this block fixes any misconfiguration where we know we run into trouble otherwise */
249 354
250#ifndef CLOCK_MONOTONIC 355#ifndef CLOCK_MONOTONIC
… …
267# include <sys/select.h> 372# include <sys/select.h>
268# endif 373# endif
269#endif 374#endif
270 375
271#if EV_USE_INOTIFY 376#if EV_USE_INOTIFY
377# include <sys/utsname.h>
378# include <sys/statfs.h>
272# include <sys/inotify.h> 379# include <sys/inotify.h>
380/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
381# ifndef IN_DONT_FOLLOW
382# undef EV_USE_INOTIFY
383# define EV_USE_INOTIFY 0
384# endif
273#endif 385#endif
274 386
275#if EV_SELECT_IS_WINSOCKET 387#if EV_SELECT_IS_WINSOCKET
276# include <winsock.h> 388# include <winsock.h>
277#endif 389#endif
278 390
279#if EV_USE_EVENTFD 391#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 392/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h> 393# include <stdint.h>
394# ifndef EFD_NONBLOCK
395# define EFD_NONBLOCK O_NONBLOCK
396# endif
397# ifndef EFD_CLOEXEC
398# define EFD_CLOEXEC O_CLOEXEC
399# endif
282# ifdef __cplusplus 400# ifdef __cplusplus
283extern "C" { 401extern "C" {
284# endif 402# endif
285int eventfd (unsigned int initval, int flags); 403int eventfd (unsigned int initval, int flags);
286# ifdef __cplusplus 404# ifdef __cplusplus
287} 405}
288# endif 406# endif
289#endif 407#endif
290 408
409#if EV_USE_SIGNALFD
410# include <sys/signalfd.h>
411#endif
412
291/**/ 413/**/
292 414
293/* undefined or zero: no verification done or available */
294/* 1 or higher: ev_loop_verify function available */
295/* 2 or higher: ev_loop_verify is called frequently */
296#define EV_VERIFY 1
297
298#if EV_VERIFY > 1 415#if EV_VERIFY >= 3
299# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 416# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
300#else 417#else
301# define EV_FREQUENT_CHECK do { } while (0) 418# define EV_FREQUENT_CHECK do { } while (0)
302#endif 419#endif
303 420
… …
334# define inline_speed static noinline 451# define inline_speed static noinline
335#else 452#else
336# define inline_speed static inline 453# define inline_speed static inline
337#endif 454#endif
338 455
339#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 456#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
457
458#if EV_MINPRI == EV_MAXPRI
459# define ABSPRI(w) (((W)w), 0)
460#else
340#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 461# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
462#endif
341 463
342#define EMPTY /* required for microsofts broken pseudo-c compiler */ 464#define EMPTY /* required for microsofts broken pseudo-c compiler */
343#define EMPTY2(a,b) /* used to suppress some warnings */ 465#define EMPTY2(a,b) /* used to suppress some warnings */
344 466
345typedef ev_watcher *W; 467typedef ev_watcher *W;
… …
347typedef ev_watcher_time *WT; 469typedef ev_watcher_time *WT;
348 470
349#define ev_active(w) ((W)(w))->active 471#define ev_active(w) ((W)(w))->active
350#define ev_at(w) ((WT)(w))->at 472#define ev_at(w) ((WT)(w))->at
351 473
352#if EV_USE_MONOTONIC 474#if EV_USE_REALTIME
353/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 475/* sig_atomic_t is used to avoid per-thread variables or locking but still */
354/* giving it a reasonably high chance of working on typical architetcures */ 476/* giving it a reasonably high chance of working on typical architetcures */
477static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
478#endif
479
480#if EV_USE_MONOTONIC
355static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 481static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
356#endif 482#endif
357 483
358#ifdef _WIN32 484#ifdef _WIN32
359# include "ev_win32.c" 485# include "ev_win32.c"
… …
368{ 494{
369 syserr_cb = cb; 495 syserr_cb = cb;
370} 496}
371 497
372static void noinline 498static void noinline
373syserr (const char *msg) 499ev_syserr (const char *msg)
374{ 500{
375 if (!msg) 501 if (!msg)
376 msg = "(libev) system error"; 502 msg = "(libev) system error";
377 503
378 if (syserr_cb) 504 if (syserr_cb)
… …
424#define ev_malloc(size) ev_realloc (0, (size)) 550#define ev_malloc(size) ev_realloc (0, (size))
425#define ev_free(ptr) ev_realloc ((ptr), 0) 551#define ev_free(ptr) ev_realloc ((ptr), 0)
426 552
427/*****************************************************************************/ 553/*****************************************************************************/
428 554
555/* set in reify when reification needed */
556#define EV_ANFD_REIFY 1
557
558/* file descriptor info structure */
429typedef struct 559typedef struct
430{ 560{
431 WL head; 561 WL head;
432 unsigned char events; 562 unsigned char events; /* the events watched for */
563 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
564 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
433 unsigned char reify; 565 unsigned char unused;
566#if EV_USE_EPOLL
567 unsigned int egen; /* generation counter to counter epoll bugs */
568#endif
434#if EV_SELECT_IS_WINSOCKET 569#if EV_SELECT_IS_WINSOCKET
435 SOCKET handle; 570 SOCKET handle;
436#endif 571#endif
437} ANFD; 572} ANFD;
438 573
574/* stores the pending event set for a given watcher */
439typedef struct 575typedef struct
440{ 576{
441 W w; 577 W w;
442 int events; 578 int events; /* the pending event set for the given watcher */
443} ANPENDING; 579} ANPENDING;
444 580
445#if EV_USE_INOTIFY 581#if EV_USE_INOTIFY
446/* hash table entry per inotify-id */ 582/* hash table entry per inotify-id */
447typedef struct 583typedef struct
… …
450} ANFS; 586} ANFS;
451#endif 587#endif
452 588
453/* Heap Entry */ 589/* Heap Entry */
454#if EV_HEAP_CACHE_AT 590#if EV_HEAP_CACHE_AT
591 /* a heap element */
455 typedef struct { 592 typedef struct {
456 ev_tstamp at; 593 ev_tstamp at;
457 WT w; 594 WT w;
458 } ANHE; 595 } ANHE;
459 596
460 #define ANHE_w(he) (he).w /* access watcher, read-write */ 597 #define ANHE_w(he) (he).w /* access watcher, read-write */
461 #define ANHE_at(he) (he).at /* access cached at, read-only */ 598 #define ANHE_at(he) (he).at /* access cached at, read-only */
462 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 599 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
463#else 600#else
601 /* a heap element */
464 typedef WT ANHE; 602 typedef WT ANHE;
465 603
466 #define ANHE_w(he) (he) 604 #define ANHE_w(he) (he)
467 #define ANHE_at(he) (he)->at 605 #define ANHE_at(he) (he)->at
468 #define ANHE_at_cache(he) 606 #define ANHE_at_cache(he)
… …
492 630
493 static int ev_default_loop_ptr; 631 static int ev_default_loop_ptr;
494 632
495#endif 633#endif
496 634
635#if EV_MINIMAL < 2
636# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
637# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
638# define EV_INVOKE_PENDING invoke_cb (EV_A)
639#else
640# define EV_RELEASE_CB (void)0
641# define EV_ACQUIRE_CB (void)0
642# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
643#endif
644
645#define EVUNLOOP_RECURSE 0x80
646
497/*****************************************************************************/ 647/*****************************************************************************/
498 648
649#ifndef EV_HAVE_EV_TIME
499ev_tstamp 650ev_tstamp
500ev_time (void) 651ev_time (void)
501{ 652{
502#if EV_USE_REALTIME 653#if EV_USE_REALTIME
654 if (expect_true (have_realtime))
655 {
503 struct timespec ts; 656 struct timespec ts;
504 clock_gettime (CLOCK_REALTIME, &ts); 657 clock_gettime (CLOCK_REALTIME, &ts);
505 return ts.tv_sec + ts.tv_nsec * 1e-9; 658 return ts.tv_sec + ts.tv_nsec * 1e-9;
506#else 659 }
660#endif
661
507 struct timeval tv; 662 struct timeval tv;
508 gettimeofday (&tv, 0); 663 gettimeofday (&tv, 0);
509 return tv.tv_sec + tv.tv_usec * 1e-6; 664 return tv.tv_sec + tv.tv_usec * 1e-6;
510#endif
511} 665}
666#endif
512 667
513ev_tstamp inline_size 668inline_size ev_tstamp
514get_clock (void) 669get_clock (void)
515{ 670{
516#if EV_USE_MONOTONIC 671#if EV_USE_MONOTONIC
517 if (expect_true (have_monotonic)) 672 if (expect_true (have_monotonic))
518 { 673 {
… …
551 struct timeval tv; 706 struct timeval tv;
552 707
553 tv.tv_sec = (time_t)delay; 708 tv.tv_sec = (time_t)delay;
554 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 709 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
555 710
711 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
712 /* something not guaranteed by newer posix versions, but guaranteed */
713 /* by older ones */
556 select (0, 0, 0, 0, &tv); 714 select (0, 0, 0, 0, &tv);
557#endif 715#endif
558 } 716 }
559} 717}
560 718
561/*****************************************************************************/ 719/*****************************************************************************/
562 720
563#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 721#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
564 722
565int inline_size 723/* find a suitable new size for the given array, */
724/* hopefully by rounding to a ncie-to-malloc size */
725inline_size int
566array_nextsize (int elem, int cur, int cnt) 726array_nextsize (int elem, int cur, int cnt)
567{ 727{
568 int ncur = cur + 1; 728 int ncur = cur + 1;
569 729
570 do 730 do
… …
587array_realloc (int elem, void *base, int *cur, int cnt) 747array_realloc (int elem, void *base, int *cur, int cnt)
588{ 748{
589 *cur = array_nextsize (elem, *cur, cnt); 749 *cur = array_nextsize (elem, *cur, cnt);
590 return ev_realloc (base, elem * *cur); 750 return ev_realloc (base, elem * *cur);
591} 751}
752
753#define array_init_zero(base,count) \
754 memset ((void *)(base), 0, sizeof (*(base)) * (count))
592 755
593#define array_needsize(type,base,cur,cnt,init) \ 756#define array_needsize(type,base,cur,cnt,init) \
594 if (expect_false ((cnt) > (cur))) \ 757 if (expect_false ((cnt) > (cur))) \
595 { \ 758 { \
596 int ocur_ = (cur); \ 759 int ocur_ = (cur); \
… …
608 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 771 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
609 } 772 }
610#endif 773#endif
611 774
612#define array_free(stem, idx) \ 775#define array_free(stem, idx) \
613 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 776 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
614 777
615/*****************************************************************************/ 778/*****************************************************************************/
779
780/* dummy callback for pending events */
781static void noinline
782pendingcb (EV_P_ ev_prepare *w, int revents)
783{
784}
616 785
617void noinline 786void noinline
618ev_feed_event (EV_P_ void *w, int revents) 787ev_feed_event (EV_P_ void *w, int revents)
619{ 788{
620 W w_ = (W)w; 789 W w_ = (W)w;
… …
629 pendings [pri][w_->pending - 1].w = w_; 798 pendings [pri][w_->pending - 1].w = w_;
630 pendings [pri][w_->pending - 1].events = revents; 799 pendings [pri][w_->pending - 1].events = revents;
631 } 800 }
632} 801}
633 802
634void inline_speed 803inline_speed void
804feed_reverse (EV_P_ W w)
805{
806 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
807 rfeeds [rfeedcnt++] = w;
808}
809
810inline_size void
811feed_reverse_done (EV_P_ int revents)
812{
813 do
814 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
815 while (rfeedcnt);
816}
817
818inline_speed void
635queue_events (EV_P_ W *events, int eventcnt, int type) 819queue_events (EV_P_ W *events, int eventcnt, int type)
636{ 820{
637 int i; 821 int i;
638 822
639 for (i = 0; i < eventcnt; ++i) 823 for (i = 0; i < eventcnt; ++i)
640 ev_feed_event (EV_A_ events [i], type); 824 ev_feed_event (EV_A_ events [i], type);
641} 825}
642 826
643/*****************************************************************************/ 827/*****************************************************************************/
644 828
645void inline_size 829inline_speed void
646anfds_init (ANFD *base, int count)
647{
648 while (count--)
649 {
650 base->head = 0;
651 base->events = EV_NONE;
652 base->reify = 0;
653
654 ++base;
655 }
656}
657
658void inline_speed
659fd_event (EV_P_ int fd, int revents) 830fd_event_nc (EV_P_ int fd, int revents)
660{ 831{
661 ANFD *anfd = anfds + fd; 832 ANFD *anfd = anfds + fd;
662 ev_io *w; 833 ev_io *w;
663 834
664 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 835 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
668 if (ev) 839 if (ev)
669 ev_feed_event (EV_A_ (W)w, ev); 840 ev_feed_event (EV_A_ (W)w, ev);
670 } 841 }
671} 842}
672 843
844/* do not submit kernel events for fds that have reify set */
845/* because that means they changed while we were polling for new events */
846inline_speed void
847fd_event (EV_P_ int fd, int revents)
848{
849 ANFD *anfd = anfds + fd;
850
851 if (expect_true (!anfd->reify))
852 fd_event_nc (EV_A_ fd, revents);
853}
854
673void 855void
674ev_feed_fd_event (EV_P_ int fd, int revents) 856ev_feed_fd_event (EV_P_ int fd, int revents)
675{ 857{
676 if (fd >= 0 && fd < anfdmax) 858 if (fd >= 0 && fd < anfdmax)
677 fd_event (EV_A_ fd, revents); 859 fd_event_nc (EV_A_ fd, revents);
678} 860}
679 861
680void inline_size 862/* make sure the external fd watch events are in-sync */
863/* with the kernel/libev internal state */
864inline_size void
681fd_reify (EV_P) 865fd_reify (EV_P)
682{ 866{
683 int i; 867 int i;
684 868
685 for (i = 0; i < fdchangecnt; ++i) 869 for (i = 0; i < fdchangecnt; ++i)
… …
694 events |= (unsigned char)w->events; 878 events |= (unsigned char)w->events;
695 879
696#if EV_SELECT_IS_WINSOCKET 880#if EV_SELECT_IS_WINSOCKET
697 if (events) 881 if (events)
698 { 882 {
699 unsigned long argp; 883 unsigned long arg;
700 #ifdef EV_FD_TO_WIN32_HANDLE 884 #ifdef EV_FD_TO_WIN32_HANDLE
701 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 885 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
702 #else 886 #else
703 anfd->handle = _get_osfhandle (fd); 887 anfd->handle = _get_osfhandle (fd);
704 #endif 888 #endif
705 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 889 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
706 } 890 }
707#endif 891#endif
708 892
709 { 893 {
710 unsigned char o_events = anfd->events; 894 unsigned char o_events = anfd->events;
711 unsigned char o_reify = anfd->reify; 895 unsigned char o_reify = anfd->reify;
712 896
713 anfd->reify = 0; 897 anfd->reify = 0;
714 anfd->events = events; 898 anfd->events = events;
715 899
716 if (o_events != events || o_reify & EV_IOFDSET) 900 if (o_events != events || o_reify & EV__IOFDSET)
717 backend_modify (EV_A_ fd, o_events, events); 901 backend_modify (EV_A_ fd, o_events, events);
718 } 902 }
719 } 903 }
720 904
721 fdchangecnt = 0; 905 fdchangecnt = 0;
722} 906}
723 907
724void inline_size 908/* something about the given fd changed */
909inline_size void
725fd_change (EV_P_ int fd, int flags) 910fd_change (EV_P_ int fd, int flags)
726{ 911{
727 unsigned char reify = anfds [fd].reify; 912 unsigned char reify = anfds [fd].reify;
728 anfds [fd].reify |= flags; 913 anfds [fd].reify |= flags;
729 914
… …
733 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 918 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
734 fdchanges [fdchangecnt - 1] = fd; 919 fdchanges [fdchangecnt - 1] = fd;
735 } 920 }
736} 921}
737 922
738void inline_speed 923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
924inline_speed void
739fd_kill (EV_P_ int fd) 925fd_kill (EV_P_ int fd)
740{ 926{
741 ev_io *w; 927 ev_io *w;
742 928
743 while ((w = (ev_io *)anfds [fd].head)) 929 while ((w = (ev_io *)anfds [fd].head))
… …
745 ev_io_stop (EV_A_ w); 931 ev_io_stop (EV_A_ w);
746 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
747 } 933 }
748} 934}
749 935
750int inline_size 936/* check whether the given fd is atcually valid, for error recovery */
937inline_size int
751fd_valid (int fd) 938fd_valid (int fd)
752{ 939{
753#ifdef _WIN32 940#ifdef _WIN32
754 return _get_osfhandle (fd) != -1; 941 return _get_osfhandle (fd) != -1;
755#else 942#else
… …
763{ 950{
764 int fd; 951 int fd;
765 952
766 for (fd = 0; fd < anfdmax; ++fd) 953 for (fd = 0; fd < anfdmax; ++fd)
767 if (anfds [fd].events) 954 if (anfds [fd].events)
768 if (!fd_valid (fd) == -1 && errno == EBADF) 955 if (!fd_valid (fd) && errno == EBADF)
769 fd_kill (EV_A_ fd); 956 fd_kill (EV_A_ fd);
770} 957}
771 958
772/* called on ENOMEM in select/poll to kill some fds and retry */ 959/* called on ENOMEM in select/poll to kill some fds and retry */
773static void noinline 960static void noinline
… …
791 978
792 for (fd = 0; fd < anfdmax; ++fd) 979 for (fd = 0; fd < anfdmax; ++fd)
793 if (anfds [fd].events) 980 if (anfds [fd].events)
794 { 981 {
795 anfds [fd].events = 0; 982 anfds [fd].events = 0;
983 anfds [fd].emask = 0;
796 fd_change (EV_A_ fd, EV_IOFDSET | 1); 984 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
797 } 985 }
798} 986}
799 987
800/*****************************************************************************/ 988/*****************************************************************************/
801 989
… …
817#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 1005#define HEAP0 (DHEAP - 1) /* index of first element in heap */
818#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 1006#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
819#define UPHEAP_DONE(p,k) ((p) == (k)) 1007#define UPHEAP_DONE(p,k) ((p) == (k))
820 1008
821/* away from the root */ 1009/* away from the root */
822void inline_speed 1010inline_speed void
823downheap (ANHE *heap, int N, int k) 1011downheap (ANHE *heap, int N, int k)
824{ 1012{
825 ANHE he = heap [k]; 1013 ANHE he = heap [k];
826 ANHE *E = heap + N + HEAP0; 1014 ANHE *E = heap + N + HEAP0;
827 1015
… …
867#define HEAP0 1 1055#define HEAP0 1
868#define HPARENT(k) ((k) >> 1) 1056#define HPARENT(k) ((k) >> 1)
869#define UPHEAP_DONE(p,k) (!(p)) 1057#define UPHEAP_DONE(p,k) (!(p))
870 1058
871/* away from the root */ 1059/* away from the root */
872void inline_speed 1060inline_speed void
873downheap (ANHE *heap, int N, int k) 1061downheap (ANHE *heap, int N, int k)
874{ 1062{
875 ANHE he = heap [k]; 1063 ANHE he = heap [k];
876 1064
877 for (;;) 1065 for (;;)
… …
897 ev_active (ANHE_w (he)) = k; 1085 ev_active (ANHE_w (he)) = k;
898} 1086}
899#endif 1087#endif
900 1088
901/* towards the root */ 1089/* towards the root */
902void inline_speed 1090inline_speed void
903upheap (ANHE *heap, int k) 1091upheap (ANHE *heap, int k)
904{ 1092{
905 ANHE he = heap [k]; 1093 ANHE he = heap [k];
906 1094
907 for (;;) 1095 for (;;)
… …
918 1106
919 heap [k] = he; 1107 heap [k] = he;
920 ev_active (ANHE_w (he)) = k; 1108 ev_active (ANHE_w (he)) = k;
921} 1109}
922 1110
923void inline_size 1111/* move an element suitably so it is in a correct place */
1112inline_size void
924adjustheap (ANHE *heap, int N, int k) 1113adjustheap (ANHE *heap, int N, int k)
925{ 1114{
926 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 1115 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
927 upheap (heap, k); 1116 upheap (heap, k);
928 else 1117 else
929 downheap (heap, N, k); 1118 downheap (heap, N, k);
930} 1119}
931 1120
932/* rebuild the heap: this function is used only once and executed rarely */ 1121/* rebuild the heap: this function is used only once and executed rarely */
933void inline_size 1122inline_size void
934reheap (ANHE *heap, int N) 1123reheap (ANHE *heap, int N)
935{ 1124{
936 int i; 1125 int i;
1126
937 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 1127 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
938 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ 1128 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
939 for (i = 0; i < N; ++i) 1129 for (i = 0; i < N; ++i)
940 upheap (heap, i + HEAP0); 1130 upheap (heap, i + HEAP0);
941} 1131}
942 1132
943#if EV_VERIFY
944static void
945checkheap (ANHE *heap, int N)
946{
947 int i;
948
949 for (i = HEAP0; i < N + HEAP0; ++i)
950 {
951 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
952 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
953 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
954 }
955}
956#endif
957
958/*****************************************************************************/ 1133/*****************************************************************************/
959 1134
1135/* associate signal watchers to a signal signal */
960typedef struct 1136typedef struct
961{ 1137{
962 WL head; 1138 WL head;
963 EV_ATOMIC_T gotsig; 1139 EV_ATOMIC_T gotsig;
964} ANSIG; 1140} ANSIG;
… …
966static ANSIG *signals; 1142static ANSIG *signals;
967static int signalmax; 1143static int signalmax;
968 1144
969static EV_ATOMIC_T gotsig; 1145static EV_ATOMIC_T gotsig;
970 1146
971void inline_size
972signals_init (ANSIG *base, int count)
973{
974 while (count--)
975 {
976 base->head = 0;
977 base->gotsig = 0;
978
979 ++base;
980 }
981}
982
983/*****************************************************************************/ 1147/*****************************************************************************/
984 1148
985void inline_speed 1149/* used to prepare libev internal fd's */
1150/* this is not fork-safe */
1151inline_speed void
986fd_intern (int fd) 1152fd_intern (int fd)
987{ 1153{
988#ifdef _WIN32 1154#ifdef _WIN32
989 int arg = 1; 1155 unsigned long arg = 1;
990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1156 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991#else 1157#else
992 fcntl (fd, F_SETFD, FD_CLOEXEC); 1158 fcntl (fd, F_SETFD, FD_CLOEXEC);
993 fcntl (fd, F_SETFL, O_NONBLOCK); 1159 fcntl (fd, F_SETFL, O_NONBLOCK);
994#endif 1160#endif
995} 1161}
996 1162
997static void noinline 1163static void noinline
998evpipe_init (EV_P) 1164evpipe_init (EV_P)
999{ 1165{
1000 if (!ev_is_active (&pipeev)) 1166 if (!ev_is_active (&pipe_w))
1001 { 1167 {
1002#if EV_USE_EVENTFD 1168#if EV_USE_EVENTFD
1169 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1170 if (evfd < 0 && errno == EINVAL)
1003 if ((evfd = eventfd (0, 0)) >= 0) 1171 evfd = eventfd (0, 0);
1172
1173 if (evfd >= 0)
1004 { 1174 {
1005 evpipe [0] = -1; 1175 evpipe [0] = -1;
1006 fd_intern (evfd); 1176 fd_intern (evfd); /* doing it twice doesn't hurt */
1007 ev_io_set (&pipeev, evfd, EV_READ); 1177 ev_io_set (&pipe_w, evfd, EV_READ);
1008 } 1178 }
1009 else 1179 else
1010#endif 1180#endif
1011 { 1181 {
1012 while (pipe (evpipe)) 1182 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe"); 1183 ev_syserr ("(libev) error creating signal/async pipe");
1014 1184
1015 fd_intern (evpipe [0]); 1185 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]); 1186 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ); 1187 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1018 } 1188 }
1019 1189
1020 ev_io_start (EV_A_ &pipeev); 1190 ev_io_start (EV_A_ &pipe_w);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */ 1191 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 } 1192 }
1023} 1193}
1024 1194
1025void inline_size 1195inline_size void
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1196evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{ 1197{
1028 if (!*flag) 1198 if (!*flag)
1029 { 1199 {
1030 int old_errno = errno; /* save errno because write might clobber it */ 1200 int old_errno = errno; /* save errno because write might clobber it */
… …
1043 1213
1044 errno = old_errno; 1214 errno = old_errno;
1045 } 1215 }
1046} 1216}
1047 1217
1218/* called whenever the libev signal pipe */
1219/* got some events (signal, async) */
1048static void 1220static void
1049pipecb (EV_P_ ev_io *iow, int revents) 1221pipecb (EV_P_ ev_io *iow, int revents)
1050{ 1222{
1051#if EV_USE_EVENTFD 1223#if EV_USE_EVENTFD
1052 if (evfd >= 0) 1224 if (evfd >= 0)
… …
1108ev_feed_signal_event (EV_P_ int signum) 1280ev_feed_signal_event (EV_P_ int signum)
1109{ 1281{
1110 WL w; 1282 WL w;
1111 1283
1112#if EV_MULTIPLICITY 1284#if EV_MULTIPLICITY
1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1285 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1114#endif 1286#endif
1115 1287
1116 --signum; 1288 --signum;
1117 1289
1118 if (signum < 0 || signum >= signalmax) 1290 if (signum < 0 || signum >= signalmax)
… …
1122 1294
1123 for (w = signals [signum].head; w; w = w->next) 1295 for (w = signals [signum].head; w; w = w->next)
1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1296 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1125} 1297}
1126 1298
1299#if EV_USE_SIGNALFD
1300static void
1301sigfdcb (EV_P_ ev_io *iow, int revents)
1302{
1303 struct signalfd_siginfo si[4], *sip;
1304
1305 for (;;)
1306 {
1307 ssize_t res = read (sigfd, si, sizeof (si));
1308
1309 /* not ISO-C, as res might be -1, but works with SuS */
1310 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1311 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1312
1313 if (res < (ssize_t)sizeof (si))
1314 break;
1315 }
1316}
1317#endif
1318
1127/*****************************************************************************/ 1319/*****************************************************************************/
1128 1320
1129static WL childs [EV_PID_HASHSIZE]; 1321static WL childs [EV_PID_HASHSIZE];
1130 1322
1131#ifndef _WIN32 1323#ifndef _WIN32
… …
1134 1326
1135#ifndef WIFCONTINUED 1327#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0 1328# define WIFCONTINUED(status) 0
1137#endif 1329#endif
1138 1330
1139void inline_speed 1331/* handle a single child status event */
1332inline_speed void
1140child_reap (EV_P_ int chain, int pid, int status) 1333child_reap (EV_P_ int chain, int pid, int status)
1141{ 1334{
1142 ev_child *w; 1335 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1336 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144 1337
… …
1157 1350
1158#ifndef WCONTINUED 1351#ifndef WCONTINUED
1159# define WCONTINUED 0 1352# define WCONTINUED 0
1160#endif 1353#endif
1161 1354
1355/* called on sigchld etc., calls waitpid */
1162static void 1356static void
1163childcb (EV_P_ ev_signal *sw, int revents) 1357childcb (EV_P_ ev_signal *sw, int revents)
1164{ 1358{
1165 int pid, status; 1359 int pid, status;
1166 1360
… …
1247 /* kqueue is borked on everything but netbsd apparently */ 1441 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */ 1442 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE; 1443 flags &= ~EVBACKEND_KQUEUE;
1250#endif 1444#endif
1251#ifdef __APPLE__ 1445#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation 1446 /* only select works correctly on that "unix-certified" platform */
1253 flags &= ~EVBACKEND_POLL; 1447 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1448 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1254#endif 1449#endif
1255 1450
1256 return flags; 1451 return flags;
1257} 1452}
1258 1453
… …
1272ev_backend (EV_P) 1467ev_backend (EV_P)
1273{ 1468{
1274 return backend; 1469 return backend;
1275} 1470}
1276 1471
1472#if EV_MINIMAL < 2
1277unsigned int 1473unsigned int
1278ev_loop_count (EV_P) 1474ev_loop_count (EV_P)
1279{ 1475{
1280 return loop_count; 1476 return loop_count;
1281} 1477}
1282 1478
1479unsigned int
1480ev_loop_depth (EV_P)
1481{
1482 return loop_depth;
1483}
1484
1283void 1485void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1486ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{ 1487{
1286 io_blocktime = interval; 1488 io_blocktime = interval;
1287} 1489}
… …
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1492ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{ 1493{
1292 timeout_blocktime = interval; 1494 timeout_blocktime = interval;
1293} 1495}
1294 1496
1497void
1498ev_set_userdata (EV_P_ void *data)
1499{
1500 userdata = data;
1501}
1502
1503void *
1504ev_userdata (EV_P)
1505{
1506 return userdata;
1507}
1508
1509void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1510{
1511 invoke_cb = invoke_pending_cb;
1512}
1513
1514void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1515{
1516 release_cb = release;
1517 acquire_cb = acquire;
1518}
1519#endif
1520
1521/* initialise a loop structure, must be zero-initialised */
1295static void noinline 1522static void noinline
1296loop_init (EV_P_ unsigned int flags) 1523loop_init (EV_P_ unsigned int flags)
1297{ 1524{
1298 if (!backend) 1525 if (!backend)
1299 { 1526 {
1527#if EV_USE_REALTIME
1528 if (!have_realtime)
1529 {
1530 struct timespec ts;
1531
1532 if (!clock_gettime (CLOCK_REALTIME, &ts))
1533 have_realtime = 1;
1534 }
1535#endif
1536
1300#if EV_USE_MONOTONIC 1537#if EV_USE_MONOTONIC
1538 if (!have_monotonic)
1301 { 1539 {
1302 struct timespec ts; 1540 struct timespec ts;
1541
1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1542 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1304 have_monotonic = 1; 1543 have_monotonic = 1;
1305 } 1544 }
1306#endif 1545#endif
1307 1546
1308 ev_rt_now = ev_time (); 1547 ev_rt_now = ev_time ();
1309 mn_now = get_clock (); 1548 mn_now = get_clock ();
1310 now_floor = mn_now; 1549 now_floor = mn_now;
1311 rtmn_diff = ev_rt_now - mn_now; 1550 rtmn_diff = ev_rt_now - mn_now;
1551#if EV_MINIMAL < 2
1552 invoke_cb = ev_invoke_pending;
1553#endif
1312 1554
1313 io_blocktime = 0.; 1555 io_blocktime = 0.;
1314 timeout_blocktime = 0.; 1556 timeout_blocktime = 0.;
1315 backend = 0; 1557 backend = 0;
1316 backend_fd = -1; 1558 backend_fd = -1;
1317 gotasync = 0; 1559 gotasync = 0;
1318#if EV_USE_INOTIFY 1560#if EV_USE_INOTIFY
1319 fs_fd = -2; 1561 fs_fd = -2;
1320#endif 1562#endif
1563#if EV_USE_SIGNALFD
1564 sigfd = -2;
1565#endif
1321 1566
1322 /* pid check not overridable via env */ 1567 /* pid check not overridable via env */
1323#ifndef _WIN32 1568#ifndef _WIN32
1324 if (flags & EVFLAG_FORKCHECK) 1569 if (flags & EVFLAG_FORKCHECK)
1325 curpid = getpid (); 1570 curpid = getpid ();
… …
1347#endif 1592#endif
1348#if EV_USE_SELECT 1593#if EV_USE_SELECT
1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1594 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1350#endif 1595#endif
1351 1596
1597 ev_prepare_init (&pending_w, pendingcb);
1598
1352 ev_init (&pipeev, pipecb); 1599 ev_init (&pipe_w, pipecb);
1353 ev_set_priority (&pipeev, EV_MAXPRI); 1600 ev_set_priority (&pipe_w, EV_MAXPRI);
1354 } 1601 }
1355} 1602}
1356 1603
1604/* free up a loop structure */
1357static void noinline 1605static void noinline
1358loop_destroy (EV_P) 1606loop_destroy (EV_P)
1359{ 1607{
1360 int i; 1608 int i;
1361 1609
1362 if (ev_is_active (&pipeev)) 1610 if (ev_is_active (&pipe_w))
1363 { 1611 {
1364 ev_ref (EV_A); /* signal watcher */ 1612 /*ev_ref (EV_A);*/
1365 ev_io_stop (EV_A_ &pipeev); 1613 /*ev_io_stop (EV_A_ &pipe_w);*/
1366 1614
1367#if EV_USE_EVENTFD 1615#if EV_USE_EVENTFD
1368 if (evfd >= 0) 1616 if (evfd >= 0)
1369 close (evfd); 1617 close (evfd);
1370#endif 1618#endif
… …
1374 close (evpipe [0]); 1622 close (evpipe [0]);
1375 close (evpipe [1]); 1623 close (evpipe [1]);
1376 } 1624 }
1377 } 1625 }
1378 1626
1627#if EV_USE_SIGNALFD
1628 if (ev_is_active (&sigfd_w))
1629 {
1630 /*ev_ref (EV_A);*/
1631 /*ev_io_stop (EV_A_ &sigfd_w);*/
1632
1633 close (sigfd);
1634 }
1635#endif
1636
1379#if EV_USE_INOTIFY 1637#if EV_USE_INOTIFY
1380 if (fs_fd >= 0) 1638 if (fs_fd >= 0)
1381 close (fs_fd); 1639 close (fs_fd);
1382#endif 1640#endif
1383 1641
… …
1406#if EV_IDLE_ENABLE 1664#if EV_IDLE_ENABLE
1407 array_free (idle, [i]); 1665 array_free (idle, [i]);
1408#endif 1666#endif
1409 } 1667 }
1410 1668
1411 ev_free (anfds); anfdmax = 0; 1669 ev_free (anfds); anfds = 0; anfdmax = 0;
1412 1670
1413 /* have to use the microsoft-never-gets-it-right macro */ 1671 /* have to use the microsoft-never-gets-it-right macro */
1672 array_free (rfeed, EMPTY);
1414 array_free (fdchange, EMPTY); 1673 array_free (fdchange, EMPTY);
1415 array_free (timer, EMPTY); 1674 array_free (timer, EMPTY);
1416#if EV_PERIODIC_ENABLE 1675#if EV_PERIODIC_ENABLE
1417 array_free (periodic, EMPTY); 1676 array_free (periodic, EMPTY);
1418#endif 1677#endif
… …
1427 1686
1428 backend = 0; 1687 backend = 0;
1429} 1688}
1430 1689
1431#if EV_USE_INOTIFY 1690#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P); 1691inline_size void infy_fork (EV_P);
1433#endif 1692#endif
1434 1693
1435void inline_size 1694inline_size void
1436loop_fork (EV_P) 1695loop_fork (EV_P)
1437{ 1696{
1438#if EV_USE_PORT 1697#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1698 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif 1699#endif
… …
1446#endif 1705#endif
1447#if EV_USE_INOTIFY 1706#if EV_USE_INOTIFY
1448 infy_fork (EV_A); 1707 infy_fork (EV_A);
1449#endif 1708#endif
1450 1709
1451 if (ev_is_active (&pipeev)) 1710 if (ev_is_active (&pipe_w))
1452 { 1711 {
1453 /* this "locks" the handlers against writing to the pipe */ 1712 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */ 1713 /* while we modify the fd vars */
1455 gotsig = 1; 1714 gotsig = 1;
1456#if EV_ASYNC_ENABLE 1715#if EV_ASYNC_ENABLE
1457 gotasync = 1; 1716 gotasync = 1;
1458#endif 1717#endif
1459 1718
1460 ev_ref (EV_A); 1719 ev_ref (EV_A);
1461 ev_io_stop (EV_A_ &pipeev); 1720 ev_io_stop (EV_A_ &pipe_w);
1462 1721
1463#if EV_USE_EVENTFD 1722#if EV_USE_EVENTFD
1464 if (evfd >= 0) 1723 if (evfd >= 0)
1465 close (evfd); 1724 close (evfd);
1466#endif 1725#endif
… …
1471 close (evpipe [1]); 1730 close (evpipe [1]);
1472 } 1731 }
1473 1732
1474 evpipe_init (EV_A); 1733 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */ 1734 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ); 1735 pipecb (EV_A_ &pipe_w, EV_READ);
1477 } 1736 }
1478 1737
1479 postfork = 0; 1738 postfork = 0;
1480} 1739}
1481 1740
1482#if EV_MULTIPLICITY 1741#if EV_MULTIPLICITY
1742
1483struct ev_loop * 1743struct ev_loop *
1484ev_loop_new (unsigned int flags) 1744ev_loop_new (unsigned int flags)
1485{ 1745{
1486 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1746 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1487 1747
1488 memset (loop, 0, sizeof (struct ev_loop)); 1748 memset (loop, 0, sizeof (struct ev_loop));
1489
1490 loop_init (EV_A_ flags); 1749 loop_init (EV_A_ flags);
1491 1750
1492 if (ev_backend (EV_A)) 1751 if (ev_backend (EV_A))
1493 return loop; 1752 return loop;
1494 1753
… …
1505void 1764void
1506ev_loop_fork (EV_P) 1765ev_loop_fork (EV_P)
1507{ 1766{
1508 postfork = 1; /* must be in line with ev_default_fork */ 1767 postfork = 1; /* must be in line with ev_default_fork */
1509} 1768}
1769#endif /* multiplicity */
1510 1770
1511#if EV_VERIFY 1771#if EV_VERIFY
1512static void 1772static void noinline
1773verify_watcher (EV_P_ W w)
1774{
1775 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1776
1777 if (w->pending)
1778 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1779}
1780
1781static void noinline
1782verify_heap (EV_P_ ANHE *heap, int N)
1783{
1784 int i;
1785
1786 for (i = HEAP0; i < N + HEAP0; ++i)
1787 {
1788 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1789 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1790 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1791
1792 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1793 }
1794}
1795
1796static void noinline
1513array_check (W **ws, int cnt) 1797array_verify (EV_P_ W *ws, int cnt)
1514{ 1798{
1515 while (cnt--) 1799 while (cnt--)
1800 {
1516 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 1801 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1802 verify_watcher (EV_A_ ws [cnt]);
1803 }
1517} 1804}
1805#endif
1518 1806
1519static void 1807#if EV_MINIMAL < 2
1808void
1520ev_loop_verify (EV_P) 1809ev_loop_verify (EV_P)
1521{ 1810{
1811#if EV_VERIFY
1522 int i; 1812 int i;
1813 WL w;
1523 1814
1815 assert (activecnt >= -1);
1816
1817 assert (fdchangemax >= fdchangecnt);
1818 for (i = 0; i < fdchangecnt; ++i)
1819 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1820
1821 assert (anfdmax >= 0);
1822 for (i = 0; i < anfdmax; ++i)
1823 for (w = anfds [i].head; w; w = w->next)
1824 {
1825 verify_watcher (EV_A_ (W)w);
1826 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1827 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1828 }
1829
1830 assert (timermax >= timercnt);
1524 checkheap (timers, timercnt); 1831 verify_heap (EV_A_ timers, timercnt);
1832
1525#if EV_PERIODIC_ENABLE 1833#if EV_PERIODIC_ENABLE
1834 assert (periodicmax >= periodiccnt);
1526 checkheap (periodics, periodiccnt); 1835 verify_heap (EV_A_ periodics, periodiccnt);
1527#endif 1836#endif
1528 1837
1838 for (i = NUMPRI; i--; )
1839 {
1840 assert (pendingmax [i] >= pendingcnt [i]);
1529#if EV_IDLE_ENABLE 1841#if EV_IDLE_ENABLE
1530 for (i = NUMPRI; i--; ) 1842 assert (idleall >= 0);
1843 assert (idlemax [i] >= idlecnt [i]);
1531 array_check ((W **)idles [i], idlecnt [i]); 1844 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1532#endif 1845#endif
1846 }
1847
1533#if EV_FORK_ENABLE 1848#if EV_FORK_ENABLE
1849 assert (forkmax >= forkcnt);
1534 array_check ((W **)forks, forkcnt); 1850 array_verify (EV_A_ (W *)forks, forkcnt);
1535#endif 1851#endif
1536 array_check ((W **)prepares, preparecnt); 1852
1537 array_check ((W **)checks, checkcnt);
1538#if EV_ASYNC_ENABLE 1853#if EV_ASYNC_ENABLE
1854 assert (asyncmax >= asynccnt);
1539 array_check ((W **)asyncs, asynccnt); 1855 array_verify (EV_A_ (W *)asyncs, asynccnt);
1856#endif
1857
1858 assert (preparemax >= preparecnt);
1859 array_verify (EV_A_ (W *)prepares, preparecnt);
1860
1861 assert (checkmax >= checkcnt);
1862 array_verify (EV_A_ (W *)checks, checkcnt);
1863
1864# if 0
1865 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1866 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1540#endif 1867# endif
1541}
1542#endif 1868#endif
1543 1869}
1544#endif 1870#endif
1545 1871
1546#if EV_MULTIPLICITY 1872#if EV_MULTIPLICITY
1547struct ev_loop * 1873struct ev_loop *
1548ev_default_loop_init (unsigned int flags) 1874ev_default_loop_init (unsigned int flags)
… …
1582{ 1908{
1583#if EV_MULTIPLICITY 1909#if EV_MULTIPLICITY
1584 struct ev_loop *loop = ev_default_loop_ptr; 1910 struct ev_loop *loop = ev_default_loop_ptr;
1585#endif 1911#endif
1586 1912
1913 ev_default_loop_ptr = 0;
1914
1587#ifndef _WIN32 1915#ifndef _WIN32
1588 ev_ref (EV_A); /* child watcher */ 1916 ev_ref (EV_A); /* child watcher */
1589 ev_signal_stop (EV_A_ &childev); 1917 ev_signal_stop (EV_A_ &childev);
1590#endif 1918#endif
1591 1919
… …
1597{ 1925{
1598#if EV_MULTIPLICITY 1926#if EV_MULTIPLICITY
1599 struct ev_loop *loop = ev_default_loop_ptr; 1927 struct ev_loop *loop = ev_default_loop_ptr;
1600#endif 1928#endif
1601 1929
1602 if (backend)
1603 postfork = 1; /* must be in line with ev_loop_fork */ 1930 postfork = 1; /* must be in line with ev_loop_fork */
1604} 1931}
1605 1932
1606/*****************************************************************************/ 1933/*****************************************************************************/
1607 1934
1608void 1935void
1609ev_invoke (EV_P_ void *w, int revents) 1936ev_invoke (EV_P_ void *w, int revents)
1610{ 1937{
1611 EV_CB_INVOKE ((W)w, revents); 1938 EV_CB_INVOKE ((W)w, revents);
1612} 1939}
1613 1940
1614void inline_speed 1941unsigned int
1615call_pending (EV_P) 1942ev_pending_count (EV_P)
1616{ 1943{
1617 int pri; 1944 int pri;
1945 unsigned int count = 0;
1618 1946
1619 EV_FREQUENT_CHECK; 1947 for (pri = NUMPRI; pri--; )
1948 count += pendingcnt [pri];
1949
1950 return count;
1951}
1952
1953void noinline
1954ev_invoke_pending (EV_P)
1955{
1956 int pri;
1620 1957
1621 for (pri = NUMPRI; pri--; ) 1958 for (pri = NUMPRI; pri--; )
1622 while (pendingcnt [pri]) 1959 while (pendingcnt [pri])
1623 { 1960 {
1624 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1961 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1625 1962
1626 if (expect_true (p->w))
1627 {
1628 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1963 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1964 /* ^ this is no longer true, as pending_w could be here */
1629 1965
1630 p->w->pending = 0; 1966 p->w->pending = 0;
1631 EV_CB_INVOKE (p->w, p->events); 1967 EV_CB_INVOKE (p->w, p->events);
1632 } 1968 EV_FREQUENT_CHECK;
1633 } 1969 }
1634
1635 EV_FREQUENT_CHECK;
1636} 1970}
1637 1971
1638#if EV_IDLE_ENABLE 1972#if EV_IDLE_ENABLE
1639void inline_size 1973/* make idle watchers pending. this handles the "call-idle */
1974/* only when higher priorities are idle" logic */
1975inline_size void
1640idle_reify (EV_P) 1976idle_reify (EV_P)
1641{ 1977{
1642 if (expect_false (idleall)) 1978 if (expect_false (idleall))
1643 { 1979 {
1644 int pri; 1980 int pri;
… …
1656 } 1992 }
1657 } 1993 }
1658} 1994}
1659#endif 1995#endif
1660 1996
1661void inline_size 1997/* make timers pending */
1998inline_size void
1662timers_reify (EV_P) 1999timers_reify (EV_P)
1663{ 2000{
1664 EV_FREQUENT_CHECK; 2001 EV_FREQUENT_CHECK;
1665 2002
1666 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 2003 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1667 { 2004 {
1668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 2005 do
1669
1670 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1671
1672 /* first reschedule or stop timer */
1673 if (w->repeat)
1674 { 2006 {
2007 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2008
2009 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2010
2011 /* first reschedule or stop timer */
2012 if (w->repeat)
2013 {
1675 ev_at (w) += w->repeat; 2014 ev_at (w) += w->repeat;
1676 if (ev_at (w) < mn_now) 2015 if (ev_at (w) < mn_now)
1677 ev_at (w) = mn_now; 2016 ev_at (w) = mn_now;
1678 2017
1679 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2018 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1680 2019
1681 ANHE_at_cache (timers [HEAP0]); 2020 ANHE_at_cache (timers [HEAP0]);
1682 downheap (timers, timercnt, HEAP0); 2021 downheap (timers, timercnt, HEAP0);
2022 }
2023 else
2024 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2025
2026 EV_FREQUENT_CHECK;
2027 feed_reverse (EV_A_ (W)w);
1683 } 2028 }
1684 else 2029 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1686 2030
1687 EV_FREQUENT_CHECK;
1688 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2031 feed_reverse_done (EV_A_ EV_TIMEOUT);
1689 } 2032 }
1690} 2033}
1691 2034
1692#if EV_PERIODIC_ENABLE 2035#if EV_PERIODIC_ENABLE
1693void inline_size 2036/* make periodics pending */
2037inline_size void
1694periodics_reify (EV_P) 2038periodics_reify (EV_P)
1695{ 2039{
1696 EV_FREQUENT_CHECK; 2040 EV_FREQUENT_CHECK;
2041
1697 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 2042 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1698 { 2043 {
1699 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2044 int feed_count = 0;
1700 2045
1701 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2046 do
1702
1703 /* first reschedule or stop timer */
1704 if (w->reschedule_cb)
1705 { 2047 {
2048 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2049
2050 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2051
2052 /* first reschedule or stop timer */
2053 if (w->reschedule_cb)
2054 {
1706 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2055 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1707 2056
1708 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 2057 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1709 2058
1710 ANHE_at_cache (periodics [HEAP0]); 2059 ANHE_at_cache (periodics [HEAP0]);
1711 downheap (periodics, periodiccnt, HEAP0); 2060 downheap (periodics, periodiccnt, HEAP0);
2061 }
2062 else if (w->interval)
2063 {
2064 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2065 /* if next trigger time is not sufficiently in the future, put it there */
2066 /* this might happen because of floating point inexactness */
2067 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2068 {
2069 ev_at (w) += w->interval;
2070
2071 /* if interval is unreasonably low we might still have a time in the past */
2072 /* so correct this. this will make the periodic very inexact, but the user */
2073 /* has effectively asked to get triggered more often than possible */
2074 if (ev_at (w) < ev_rt_now)
2075 ev_at (w) = ev_rt_now;
2076 }
2077
2078 ANHE_at_cache (periodics [HEAP0]);
2079 downheap (periodics, periodiccnt, HEAP0);
2080 }
2081 else
2082 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2083
1712 EV_FREQUENT_CHECK; 2084 EV_FREQUENT_CHECK;
2085 feed_reverse (EV_A_ (W)w);
1713 } 2086 }
1714 else if (w->interval) 2087 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1715 {
1716 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1717 /* if next trigger time is not sufficiently in the future, put it there */
1718 /* this might happen because of floating point inexactness */
1719 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1720 {
1721 ev_at (w) += w->interval;
1722 2088
1723 /* if interval is unreasonably low we might still have a time in the past */
1724 /* so correct this. this will make the periodic very inexact, but the user */
1725 /* has effectively asked to get triggered more often than possible */
1726 if (ev_at (w) < ev_rt_now)
1727 ev_at (w) = ev_rt_now;
1728 }
1729
1730 ANHE_at_cache (periodics [HEAP0]);
1731 downheap (periodics, periodiccnt, HEAP0);
1732 }
1733 else
1734 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1735
1736 EV_FREQUENT_CHECK;
1737 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2089 feed_reverse_done (EV_A_ EV_PERIODIC);
1738 } 2090 }
1739} 2091}
1740 2092
2093/* simply recalculate all periodics */
2094/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1741static void noinline 2095static void noinline
1742periodics_reschedule (EV_P) 2096periodics_reschedule (EV_P)
1743{ 2097{
1744 int i; 2098 int i;
1745 2099
… …
1758 2112
1759 reheap (periodics, periodiccnt); 2113 reheap (periodics, periodiccnt);
1760} 2114}
1761#endif 2115#endif
1762 2116
1763void inline_speed 2117/* adjust all timers by a given offset */
2118static void noinline
2119timers_reschedule (EV_P_ ev_tstamp adjust)
2120{
2121 int i;
2122
2123 for (i = 0; i < timercnt; ++i)
2124 {
2125 ANHE *he = timers + i + HEAP0;
2126 ANHE_w (*he)->at += adjust;
2127 ANHE_at_cache (*he);
2128 }
2129}
2130
2131/* fetch new monotonic and realtime times from the kernel */
2132/* also detetc if there was a timejump, and act accordingly */
2133inline_speed void
1764time_update (EV_P_ ev_tstamp max_block) 2134time_update (EV_P_ ev_tstamp max_block)
1765{ 2135{
1766 int i;
1767
1768#if EV_USE_MONOTONIC 2136#if EV_USE_MONOTONIC
1769 if (expect_true (have_monotonic)) 2137 if (expect_true (have_monotonic))
1770 { 2138 {
2139 int i;
1771 ev_tstamp odiff = rtmn_diff; 2140 ev_tstamp odiff = rtmn_diff;
1772 2141
1773 mn_now = get_clock (); 2142 mn_now = get_clock ();
1774 2143
1775 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2144 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1801 ev_rt_now = ev_time (); 2170 ev_rt_now = ev_time ();
1802 mn_now = get_clock (); 2171 mn_now = get_clock ();
1803 now_floor = mn_now; 2172 now_floor = mn_now;
1804 } 2173 }
1805 2174
2175 /* no timer adjustment, as the monotonic clock doesn't jump */
2176 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1806# if EV_PERIODIC_ENABLE 2177# if EV_PERIODIC_ENABLE
1807 periodics_reschedule (EV_A); 2178 periodics_reschedule (EV_A);
1808# endif 2179# endif
1809 /* no timer adjustment, as the monotonic clock doesn't jump */
1810 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1811 } 2180 }
1812 else 2181 else
1813#endif 2182#endif
1814 { 2183 {
1815 ev_rt_now = ev_time (); 2184 ev_rt_now = ev_time ();
1816 2185
1817 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2186 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1818 { 2187 {
2188 /* adjust timers. this is easy, as the offset is the same for all of them */
2189 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1819#if EV_PERIODIC_ENABLE 2190#if EV_PERIODIC_ENABLE
1820 periodics_reschedule (EV_A); 2191 periodics_reschedule (EV_A);
1821#endif 2192#endif
1822 /* adjust timers. this is easy, as the offset is the same for all of them */
1823 for (i = 0; i < timercnt; ++i)
1824 {
1825 ANHE *he = timers + i + HEAP0;
1826 ANHE_w (*he)->at += ev_rt_now - mn_now;
1827 ANHE_at_cache (*he);
1828 }
1829 } 2193 }
1830 2194
1831 mn_now = ev_rt_now; 2195 mn_now = ev_rt_now;
1832 } 2196 }
1833} 2197}
1834 2198
1835void 2199void
1836ev_ref (EV_P)
1837{
1838 ++activecnt;
1839}
1840
1841void
1842ev_unref (EV_P)
1843{
1844 --activecnt;
1845}
1846
1847static int loop_done;
1848
1849void
1850ev_loop (EV_P_ int flags) 2200ev_loop (EV_P_ int flags)
1851{ 2201{
2202#if EV_MINIMAL < 2
2203 ++loop_depth;
2204#endif
2205
2206 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2207
1852 loop_done = EVUNLOOP_CANCEL; 2208 loop_done = EVUNLOOP_CANCEL;
1853 2209
1854 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2210 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1855 2211
1856 do 2212 do
1857 { 2213 {
2214#if EV_VERIFY >= 2
2215 ev_loop_verify (EV_A);
2216#endif
2217
1858#ifndef _WIN32 2218#ifndef _WIN32
1859 if (expect_false (curpid)) /* penalise the forking check even more */ 2219 if (expect_false (curpid)) /* penalise the forking check even more */
1860 if (expect_false (getpid () != curpid)) 2220 if (expect_false (getpid () != curpid))
1861 { 2221 {
1862 curpid = getpid (); 2222 curpid = getpid ();
… …
1868 /* we might have forked, so queue fork handlers */ 2228 /* we might have forked, so queue fork handlers */
1869 if (expect_false (postfork)) 2229 if (expect_false (postfork))
1870 if (forkcnt) 2230 if (forkcnt)
1871 { 2231 {
1872 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2232 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1873 call_pending (EV_A); 2233 EV_INVOKE_PENDING;
1874 } 2234 }
1875#endif 2235#endif
1876 2236
1877 /* queue prepare watchers (and execute them) */ 2237 /* queue prepare watchers (and execute them) */
1878 if (expect_false (preparecnt)) 2238 if (expect_false (preparecnt))
1879 { 2239 {
1880 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2240 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1881 call_pending (EV_A); 2241 EV_INVOKE_PENDING;
1882 } 2242 }
1883 2243
1884 if (expect_false (!activecnt)) 2244 if (expect_false (loop_done))
1885 break; 2245 break;
1886 2246
1887 /* we might have forked, so reify kernel state if necessary */ 2247 /* we might have forked, so reify kernel state if necessary */
1888 if (expect_false (postfork)) 2248 if (expect_false (postfork))
1889 loop_fork (EV_A); 2249 loop_fork (EV_A);
… …
1896 ev_tstamp waittime = 0.; 2256 ev_tstamp waittime = 0.;
1897 ev_tstamp sleeptime = 0.; 2257 ev_tstamp sleeptime = 0.;
1898 2258
1899 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2259 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1900 { 2260 {
2261 /* remember old timestamp for io_blocktime calculation */
2262 ev_tstamp prev_mn_now = mn_now;
2263
1901 /* update time to cancel out callback processing overhead */ 2264 /* update time to cancel out callback processing overhead */
1902 time_update (EV_A_ 1e100); 2265 time_update (EV_A_ 1e100);
1903 2266
1904 waittime = MAX_BLOCKTIME; 2267 waittime = MAX_BLOCKTIME;
1905 2268
… …
1915 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2278 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1916 if (waittime > to) waittime = to; 2279 if (waittime > to) waittime = to;
1917 } 2280 }
1918#endif 2281#endif
1919 2282
2283 /* don't let timeouts decrease the waittime below timeout_blocktime */
1920 if (expect_false (waittime < timeout_blocktime)) 2284 if (expect_false (waittime < timeout_blocktime))
1921 waittime = timeout_blocktime; 2285 waittime = timeout_blocktime;
1922 2286
1923 sleeptime = waittime - backend_fudge; 2287 /* extra check because io_blocktime is commonly 0 */
1924
1925 if (expect_true (sleeptime > io_blocktime)) 2288 if (expect_false (io_blocktime))
1926 sleeptime = io_blocktime;
1927
1928 if (sleeptime)
1929 { 2289 {
2290 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2291
2292 if (sleeptime > waittime - backend_fudge)
2293 sleeptime = waittime - backend_fudge;
2294
2295 if (expect_true (sleeptime > 0.))
2296 {
1930 ev_sleep (sleeptime); 2297 ev_sleep (sleeptime);
1931 waittime -= sleeptime; 2298 waittime -= sleeptime;
2299 }
1932 } 2300 }
1933 } 2301 }
1934 2302
2303#if EV_MINIMAL < 2
1935 ++loop_count; 2304 ++loop_count;
2305#endif
2306 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1936 backend_poll (EV_A_ waittime); 2307 backend_poll (EV_A_ waittime);
2308 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1937 2309
1938 /* update ev_rt_now, do magic */ 2310 /* update ev_rt_now, do magic */
1939 time_update (EV_A_ waittime + sleeptime); 2311 time_update (EV_A_ waittime + sleeptime);
1940 } 2312 }
1941 2313
… …
1952 2324
1953 /* queue check watchers, to be executed first */ 2325 /* queue check watchers, to be executed first */
1954 if (expect_false (checkcnt)) 2326 if (expect_false (checkcnt))
1955 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2327 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1956 2328
1957 call_pending (EV_A); 2329 EV_INVOKE_PENDING;
1958 } 2330 }
1959 while (expect_true ( 2331 while (expect_true (
1960 activecnt 2332 activecnt
1961 && !loop_done 2333 && !loop_done
1962 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2334 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1963 )); 2335 ));
1964 2336
1965 if (loop_done == EVUNLOOP_ONE) 2337 if (loop_done == EVUNLOOP_ONE)
1966 loop_done = EVUNLOOP_CANCEL; 2338 loop_done = EVUNLOOP_CANCEL;
2339
2340#if EV_MINIMAL < 2
2341 --loop_depth;
2342#endif
1967} 2343}
1968 2344
1969void 2345void
1970ev_unloop (EV_P_ int how) 2346ev_unloop (EV_P_ int how)
1971{ 2347{
1972 loop_done = how; 2348 loop_done = how;
1973} 2349}
1974 2350
2351void
2352ev_ref (EV_P)
2353{
2354 ++activecnt;
2355}
2356
2357void
2358ev_unref (EV_P)
2359{
2360 --activecnt;
2361}
2362
2363void
2364ev_now_update (EV_P)
2365{
2366 time_update (EV_A_ 1e100);
2367}
2368
2369void
2370ev_suspend (EV_P)
2371{
2372 ev_now_update (EV_A);
2373}
2374
2375void
2376ev_resume (EV_P)
2377{
2378 ev_tstamp mn_prev = mn_now;
2379
2380 ev_now_update (EV_A);
2381 timers_reschedule (EV_A_ mn_now - mn_prev);
2382#if EV_PERIODIC_ENABLE
2383 /* TODO: really do this? */
2384 periodics_reschedule (EV_A);
2385#endif
2386}
2387
1975/*****************************************************************************/ 2388/*****************************************************************************/
2389/* singly-linked list management, used when the expected list length is short */
1976 2390
1977void inline_size 2391inline_size void
1978wlist_add (WL *head, WL elem) 2392wlist_add (WL *head, WL elem)
1979{ 2393{
1980 elem->next = *head; 2394 elem->next = *head;
1981 *head = elem; 2395 *head = elem;
1982} 2396}
1983 2397
1984void inline_size 2398inline_size void
1985wlist_del (WL *head, WL elem) 2399wlist_del (WL *head, WL elem)
1986{ 2400{
1987 while (*head) 2401 while (*head)
1988 { 2402 {
1989 if (*head == elem) 2403 if (*head == elem)
… …
1994 2408
1995 head = &(*head)->next; 2409 head = &(*head)->next;
1996 } 2410 }
1997} 2411}
1998 2412
1999void inline_speed 2413/* internal, faster, version of ev_clear_pending */
2414inline_speed void
2000clear_pending (EV_P_ W w) 2415clear_pending (EV_P_ W w)
2001{ 2416{
2002 if (w->pending) 2417 if (w->pending)
2003 { 2418 {
2004 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2419 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2005 w->pending = 0; 2420 w->pending = 0;
2006 } 2421 }
2007} 2422}
2008 2423
2009int 2424int
… …
2013 int pending = w_->pending; 2428 int pending = w_->pending;
2014 2429
2015 if (expect_true (pending)) 2430 if (expect_true (pending))
2016 { 2431 {
2017 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2432 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2433 p->w = (W)&pending_w;
2018 w_->pending = 0; 2434 w_->pending = 0;
2019 p->w = 0;
2020 return p->events; 2435 return p->events;
2021 } 2436 }
2022 else 2437 else
2023 return 0; 2438 return 0;
2024} 2439}
2025 2440
2026void inline_size 2441inline_size void
2027pri_adjust (EV_P_ W w) 2442pri_adjust (EV_P_ W w)
2028{ 2443{
2029 int pri = w->priority; 2444 int pri = ev_priority (w);
2030 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2445 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2031 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2446 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2032 w->priority = pri; 2447 ev_set_priority (w, pri);
2033} 2448}
2034 2449
2035void inline_speed 2450inline_speed void
2036ev_start (EV_P_ W w, int active) 2451ev_start (EV_P_ W w, int active)
2037{ 2452{
2038 pri_adjust (EV_A_ w); 2453 pri_adjust (EV_A_ w);
2039 w->active = active; 2454 w->active = active;
2040 ev_ref (EV_A); 2455 ev_ref (EV_A);
2041} 2456}
2042 2457
2043void inline_size 2458inline_size void
2044ev_stop (EV_P_ W w) 2459ev_stop (EV_P_ W w)
2045{ 2460{
2046 ev_unref (EV_A); 2461 ev_unref (EV_A);
2047 w->active = 0; 2462 w->active = 0;
2048} 2463}
… …
2055 int fd = w->fd; 2470 int fd = w->fd;
2056 2471
2057 if (expect_false (ev_is_active (w))) 2472 if (expect_false (ev_is_active (w)))
2058 return; 2473 return;
2059 2474
2060 assert (("ev_io_start called with negative fd", fd >= 0)); 2475 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2476 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2061 2477
2062 EV_FREQUENT_CHECK; 2478 EV_FREQUENT_CHECK;
2063 2479
2064 ev_start (EV_A_ (W)w, 1); 2480 ev_start (EV_A_ (W)w, 1);
2065 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2481 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2066 wlist_add (&anfds[fd].head, (WL)w); 2482 wlist_add (&anfds[fd].head, (WL)w);
2067 2483
2068 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2484 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2069 w->events &= ~EV_IOFDSET; 2485 w->events &= ~EV__IOFDSET;
2070 2486
2071 EV_FREQUENT_CHECK; 2487 EV_FREQUENT_CHECK;
2072} 2488}
2073 2489
2074void noinline 2490void noinline
… …
2076{ 2492{
2077 clear_pending (EV_A_ (W)w); 2493 clear_pending (EV_A_ (W)w);
2078 if (expect_false (!ev_is_active (w))) 2494 if (expect_false (!ev_is_active (w)))
2079 return; 2495 return;
2080 2496
2081 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2497 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2082 2498
2083 EV_FREQUENT_CHECK; 2499 EV_FREQUENT_CHECK;
2084 2500
2085 wlist_del (&anfds[w->fd].head, (WL)w); 2501 wlist_del (&anfds[w->fd].head, (WL)w);
2086 ev_stop (EV_A_ (W)w); 2502 ev_stop (EV_A_ (W)w);
… …
2096 if (expect_false (ev_is_active (w))) 2512 if (expect_false (ev_is_active (w)))
2097 return; 2513 return;
2098 2514
2099 ev_at (w) += mn_now; 2515 ev_at (w) += mn_now;
2100 2516
2101 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2517 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2102 2518
2103 EV_FREQUENT_CHECK; 2519 EV_FREQUENT_CHECK;
2104 2520
2105 ++timercnt; 2521 ++timercnt;
2106 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 2522 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
… …
2109 ANHE_at_cache (timers [ev_active (w)]); 2525 ANHE_at_cache (timers [ev_active (w)]);
2110 upheap (timers, ev_active (w)); 2526 upheap (timers, ev_active (w));
2111 2527
2112 EV_FREQUENT_CHECK; 2528 EV_FREQUENT_CHECK;
2113 2529
2114 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 2530 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2115} 2531}
2116 2532
2117void noinline 2533void noinline
2118ev_timer_stop (EV_P_ ev_timer *w) 2534ev_timer_stop (EV_P_ ev_timer *w)
2119{ 2535{
… …
2124 EV_FREQUENT_CHECK; 2540 EV_FREQUENT_CHECK;
2125 2541
2126 { 2542 {
2127 int active = ev_active (w); 2543 int active = ev_active (w);
2128 2544
2129 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 2545 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2130 2546
2131 --timercnt; 2547 --timercnt;
2132 2548
2133 if (expect_true (active < timercnt + HEAP0)) 2549 if (expect_true (active < timercnt + HEAP0))
2134 { 2550 {
… …
2167 } 2583 }
2168 2584
2169 EV_FREQUENT_CHECK; 2585 EV_FREQUENT_CHECK;
2170} 2586}
2171 2587
2588ev_tstamp
2589ev_timer_remaining (EV_P_ ev_timer *w)
2590{
2591 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2592}
2593
2172#if EV_PERIODIC_ENABLE 2594#if EV_PERIODIC_ENABLE
2173void noinline 2595void noinline
2174ev_periodic_start (EV_P_ ev_periodic *w) 2596ev_periodic_start (EV_P_ ev_periodic *w)
2175{ 2597{
2176 if (expect_false (ev_is_active (w))) 2598 if (expect_false (ev_is_active (w)))
… …
2178 2600
2179 if (w->reschedule_cb) 2601 if (w->reschedule_cb)
2180 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2602 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2181 else if (w->interval) 2603 else if (w->interval)
2182 { 2604 {
2183 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2605 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2184 /* this formula differs from the one in periodic_reify because we do not always round up */ 2606 /* this formula differs from the one in periodic_reify because we do not always round up */
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2607 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2186 } 2608 }
2187 else 2609 else
2188 ev_at (w) = w->offset; 2610 ev_at (w) = w->offset;
… …
2196 ANHE_at_cache (periodics [ev_active (w)]); 2618 ANHE_at_cache (periodics [ev_active (w)]);
2197 upheap (periodics, ev_active (w)); 2619 upheap (periodics, ev_active (w));
2198 2620
2199 EV_FREQUENT_CHECK; 2621 EV_FREQUENT_CHECK;
2200 2622
2201 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 2623 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2202} 2624}
2203 2625
2204void noinline 2626void noinline
2205ev_periodic_stop (EV_P_ ev_periodic *w) 2627ev_periodic_stop (EV_P_ ev_periodic *w)
2206{ 2628{
… …
2211 EV_FREQUENT_CHECK; 2633 EV_FREQUENT_CHECK;
2212 2634
2213 { 2635 {
2214 int active = ev_active (w); 2636 int active = ev_active (w);
2215 2637
2216 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 2638 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2217 2639
2218 --periodiccnt; 2640 --periodiccnt;
2219 2641
2220 if (expect_true (active < periodiccnt + HEAP0)) 2642 if (expect_true (active < periodiccnt + HEAP0))
2221 { 2643 {
… …
2244 2666
2245void noinline 2667void noinline
2246ev_signal_start (EV_P_ ev_signal *w) 2668ev_signal_start (EV_P_ ev_signal *w)
2247{ 2669{
2248#if EV_MULTIPLICITY 2670#if EV_MULTIPLICITY
2249 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2671 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2250#endif 2672#endif
2251 if (expect_false (ev_is_active (w))) 2673 if (expect_false (ev_is_active (w)))
2252 return; 2674 return;
2253 2675
2254 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2676 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2255 2677
2678 EV_FREQUENT_CHECK;
2679
2680#if EV_USE_SIGNALFD
2681 if (sigfd == -2)
2682 {
2683 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2684 if (sigfd < 0 && errno == EINVAL)
2685 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2686
2687 if (sigfd >= 0)
2688 {
2689 fd_intern (sigfd); /* doing it twice will not hurt */
2690
2691 sigemptyset (&sigfd_set);
2692
2693 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2694 ev_set_priority (&sigfd_w, EV_MAXPRI);
2695 ev_io_start (EV_A_ &sigfd_w);
2696 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2697 }
2698 }
2699
2700 if (sigfd >= 0)
2701 {
2702 /* TODO: check .head */
2703 sigaddset (&sigfd_set, w->signum);
2704 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2705
2706 signalfd (sigfd, &sigfd_set, 0);
2707 }
2708 else
2709#endif
2256 evpipe_init (EV_A); 2710 evpipe_init (EV_A);
2257
2258 EV_FREQUENT_CHECK;
2259 2711
2260 { 2712 {
2261#ifndef _WIN32 2713#ifndef _WIN32
2262 sigset_t full, prev; 2714 sigset_t full, prev;
2263 sigfillset (&full); 2715 sigfillset (&full);
2264 sigprocmask (SIG_SETMASK, &full, &prev); 2716 sigprocmask (SIG_SETMASK, &full, &prev);
2265#endif 2717#endif
2266 2718
2267 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2719 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2268 2720
2269#ifndef _WIN32 2721#ifndef _WIN32
2722# if EV_USE_SIGNALFD
2723 if (sigfd < 0)/*TODO*/
2724# endif
2725 sigdelset (&prev, w->signum);
2270 sigprocmask (SIG_SETMASK, &prev, 0); 2726 sigprocmask (SIG_SETMASK, &prev, 0);
2271#endif 2727#endif
2272 } 2728 }
2273 2729
2274 ev_start (EV_A_ (W)w, 1); 2730 ev_start (EV_A_ (W)w, 1);
… …
2277 if (!((WL)w)->next) 2733 if (!((WL)w)->next)
2278 { 2734 {
2279#if _WIN32 2735#if _WIN32
2280 signal (w->signum, ev_sighandler); 2736 signal (w->signum, ev_sighandler);
2281#else 2737#else
2738# if EV_USE_SIGNALFD
2739 if (sigfd < 0) /*TODO*/
2740# endif
2741 {
2282 struct sigaction sa; 2742 struct sigaction sa = { };
2283 sa.sa_handler = ev_sighandler; 2743 sa.sa_handler = ev_sighandler;
2284 sigfillset (&sa.sa_mask); 2744 sigfillset (&sa.sa_mask);
2285 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2745 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2286 sigaction (w->signum, &sa, 0); 2746 sigaction (w->signum, &sa, 0);
2747 }
2287#endif 2748#endif
2288 } 2749 }
2289 2750
2290 EV_FREQUENT_CHECK; 2751 EV_FREQUENT_CHECK;
2291} 2752}
… …
2301 2762
2302 wlist_del (&signals [w->signum - 1].head, (WL)w); 2763 wlist_del (&signals [w->signum - 1].head, (WL)w);
2303 ev_stop (EV_A_ (W)w); 2764 ev_stop (EV_A_ (W)w);
2304 2765
2305 if (!signals [w->signum - 1].head) 2766 if (!signals [w->signum - 1].head)
2767#if EV_USE_SIGNALFD
2768 if (sigfd >= 0)
2769 {
2770 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2771 sigdelset (&sigfd_set, w->signum);
2772 signalfd (sigfd, &sigfd_set, 0);
2773 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2774 /*TODO: maybe unblock signal? */
2775 }
2776 else
2777#endif
2306 signal (w->signum, SIG_DFL); 2778 signal (w->signum, SIG_DFL);
2307 2779
2308 EV_FREQUENT_CHECK; 2780 EV_FREQUENT_CHECK;
2309} 2781}
2310 2782
2311void 2783void
2312ev_child_start (EV_P_ ev_child *w) 2784ev_child_start (EV_P_ ev_child *w)
2313{ 2785{
2314#if EV_MULTIPLICITY 2786#if EV_MULTIPLICITY
2315 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2787 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316#endif 2788#endif
2317 if (expect_false (ev_is_active (w))) 2789 if (expect_false (ev_is_active (w)))
2318 return; 2790 return;
2319 2791
2320 EV_FREQUENT_CHECK; 2792 EV_FREQUENT_CHECK;
… …
2345# ifdef _WIN32 2817# ifdef _WIN32
2346# undef lstat 2818# undef lstat
2347# define lstat(a,b) _stati64 (a,b) 2819# define lstat(a,b) _stati64 (a,b)
2348# endif 2820# endif
2349 2821
2350#define DEF_STAT_INTERVAL 5.0074891 2822#define DEF_STAT_INTERVAL 5.0074891
2823#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2351#define MIN_STAT_INTERVAL 0.1074891 2824#define MIN_STAT_INTERVAL 0.1074891
2352 2825
2353static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2826static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2354 2827
2355#if EV_USE_INOTIFY 2828#if EV_USE_INOTIFY
2356# define EV_INOTIFY_BUFSIZE 8192 2829# define EV_INOTIFY_BUFSIZE 8192
… …
2360{ 2833{
2361 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 2834 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2362 2835
2363 if (w->wd < 0) 2836 if (w->wd < 0)
2364 { 2837 {
2838 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2365 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2839 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2366 2840
2367 /* monitor some parent directory for speedup hints */ 2841 /* monitor some parent directory for speedup hints */
2368 /* note that exceeding the hardcoded limit is not a correctness issue, */ 2842 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2369 /* but an efficiency issue only */ 2843 /* but an efficiency issue only */
2370 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2844 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2371 { 2845 {
2372 char path [4096]; 2846 char path [4096];
2373 strcpy (path, w->path); 2847 strcpy (path, w->path);
… …
2377 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2851 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2378 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2852 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2379 2853
2380 char *pend = strrchr (path, '/'); 2854 char *pend = strrchr (path, '/');
2381 2855
2382 if (!pend) 2856 if (!pend || pend == path)
2383 break; /* whoops, no '/', complain to your admin */ 2857 break;
2384 2858
2385 *pend = 0; 2859 *pend = 0;
2386 w->wd = inotify_add_watch (fs_fd, path, mask); 2860 w->wd = inotify_add_watch (fs_fd, path, mask);
2387 } 2861 }
2388 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2862 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2389 } 2863 }
2390 } 2864 }
2391 else
2392 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2393 2865
2394 if (w->wd >= 0) 2866 if (w->wd >= 0)
2867 {
2395 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2868 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2869
2870 /* now local changes will be tracked by inotify, but remote changes won't */
2871 /* unless the filesystem it known to be local, we therefore still poll */
2872 /* also do poll on <2.6.25, but with normal frequency */
2873 struct statfs sfs;
2874
2875 if (fs_2625 && !statfs (w->path, &sfs))
2876 if (sfs.f_type == 0x1373 /* devfs */
2877 || sfs.f_type == 0xEF53 /* ext2/3 */
2878 || sfs.f_type == 0x3153464a /* jfs */
2879 || sfs.f_type == 0x52654973 /* reiser3 */
2880 || sfs.f_type == 0x01021994 /* tempfs */
2881 || sfs.f_type == 0x58465342 /* xfs */)
2882 return;
2883
2884 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2885 ev_timer_again (EV_A_ &w->timer);
2886 }
2396} 2887}
2397 2888
2398static void noinline 2889static void noinline
2399infy_del (EV_P_ ev_stat *w) 2890infy_del (EV_P_ ev_stat *w)
2400{ 2891{
… …
2414 2905
2415static void noinline 2906static void noinline
2416infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2907infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2417{ 2908{
2418 if (slot < 0) 2909 if (slot < 0)
2419 /* overflow, need to check for all hahs slots */ 2910 /* overflow, need to check for all hash slots */
2420 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2911 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2421 infy_wd (EV_A_ slot, wd, ev); 2912 infy_wd (EV_A_ slot, wd, ev);
2422 else 2913 else
2423 { 2914 {
2424 WL w_; 2915 WL w_;
… …
2430 2921
2431 if (w->wd == wd || wd == -1) 2922 if (w->wd == wd || wd == -1)
2432 { 2923 {
2433 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2924 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2434 { 2925 {
2926 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2435 w->wd = -1; 2927 w->wd = -1;
2436 infy_add (EV_A_ w); /* re-add, no matter what */ 2928 infy_add (EV_A_ w); /* re-add, no matter what */
2437 } 2929 }
2438 2930
2439 stat_timer_cb (EV_A_ &w->timer, 0); 2931 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2452 2944
2453 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2945 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2454 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2946 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2455} 2947}
2456 2948
2457void inline_size 2949inline_size void
2950check_2625 (EV_P)
2951{
2952 /* kernels < 2.6.25 are borked
2953 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2954 */
2955 struct utsname buf;
2956 int major, minor, micro;
2957
2958 if (uname (&buf))
2959 return;
2960
2961 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2962 return;
2963
2964 if (major < 2
2965 || (major == 2 && minor < 6)
2966 || (major == 2 && minor == 6 && micro < 25))
2967 return;
2968
2969 fs_2625 = 1;
2970}
2971
2972inline_size void
2458infy_init (EV_P) 2973infy_init (EV_P)
2459{ 2974{
2460 if (fs_fd != -2) 2975 if (fs_fd != -2)
2461 return; 2976 return;
2977
2978 fs_fd = -1;
2979
2980 check_2625 (EV_A);
2462 2981
2463 fs_fd = inotify_init (); 2982 fs_fd = inotify_init ();
2464 2983
2465 if (fs_fd >= 0) 2984 if (fs_fd >= 0)
2466 { 2985 {
… …
2468 ev_set_priority (&fs_w, EV_MAXPRI); 2987 ev_set_priority (&fs_w, EV_MAXPRI);
2469 ev_io_start (EV_A_ &fs_w); 2988 ev_io_start (EV_A_ &fs_w);
2470 } 2989 }
2471} 2990}
2472 2991
2473void inline_size 2992inline_size void
2474infy_fork (EV_P) 2993infy_fork (EV_P)
2475{ 2994{
2476 int slot; 2995 int slot;
2477 2996
2478 if (fs_fd < 0) 2997 if (fs_fd < 0)
… …
2494 w->wd = -1; 3013 w->wd = -1;
2495 3014
2496 if (fs_fd >= 0) 3015 if (fs_fd >= 0)
2497 infy_add (EV_A_ w); /* re-add, no matter what */ 3016 infy_add (EV_A_ w); /* re-add, no matter what */
2498 else 3017 else
2499 ev_timer_start (EV_A_ &w->timer); 3018 ev_timer_again (EV_A_ &w->timer);
2500 } 3019 }
2501
2502 } 3020 }
2503} 3021}
2504 3022
3023#endif
3024
3025#ifdef _WIN32
3026# define EV_LSTAT(p,b) _stati64 (p, b)
3027#else
3028# define EV_LSTAT(p,b) lstat (p, b)
2505#endif 3029#endif
2506 3030
2507void 3031void
2508ev_stat_stat (EV_P_ ev_stat *w) 3032ev_stat_stat (EV_P_ ev_stat *w)
2509{ 3033{
… …
2536 || w->prev.st_atime != w->attr.st_atime 3060 || w->prev.st_atime != w->attr.st_atime
2537 || w->prev.st_mtime != w->attr.st_mtime 3061 || w->prev.st_mtime != w->attr.st_mtime
2538 || w->prev.st_ctime != w->attr.st_ctime 3062 || w->prev.st_ctime != w->attr.st_ctime
2539 ) { 3063 ) {
2540 #if EV_USE_INOTIFY 3064 #if EV_USE_INOTIFY
3065 if (fs_fd >= 0)
3066 {
2541 infy_del (EV_A_ w); 3067 infy_del (EV_A_ w);
2542 infy_add (EV_A_ w); 3068 infy_add (EV_A_ w);
2543 ev_stat_stat (EV_A_ w); /* avoid race... */ 3069 ev_stat_stat (EV_A_ w); /* avoid race... */
3070 }
2544 #endif 3071 #endif
2545 3072
2546 ev_feed_event (EV_A_ w, EV_STAT); 3073 ev_feed_event (EV_A_ w, EV_STAT);
2547 } 3074 }
2548} 3075}
… …
2551ev_stat_start (EV_P_ ev_stat *w) 3078ev_stat_start (EV_P_ ev_stat *w)
2552{ 3079{
2553 if (expect_false (ev_is_active (w))) 3080 if (expect_false (ev_is_active (w)))
2554 return; 3081 return;
2555 3082
2556 /* since we use memcmp, we need to clear any padding data etc. */
2557 memset (&w->prev, 0, sizeof (ev_statdata));
2558 memset (&w->attr, 0, sizeof (ev_statdata));
2559
2560 ev_stat_stat (EV_A_ w); 3083 ev_stat_stat (EV_A_ w);
2561 3084
3085 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2562 if (w->interval < MIN_STAT_INTERVAL) 3086 w->interval = MIN_STAT_INTERVAL;
2563 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2564 3087
2565 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3088 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2566 ev_set_priority (&w->timer, ev_priority (w)); 3089 ev_set_priority (&w->timer, ev_priority (w));
2567 3090
2568#if EV_USE_INOTIFY 3091#if EV_USE_INOTIFY
2569 infy_init (EV_A); 3092 infy_init (EV_A);
2570 3093
2571 if (fs_fd >= 0) 3094 if (fs_fd >= 0)
2572 infy_add (EV_A_ w); 3095 infy_add (EV_A_ w);
2573 else 3096 else
2574#endif 3097#endif
2575 ev_timer_start (EV_A_ &w->timer); 3098 ev_timer_again (EV_A_ &w->timer);
2576 3099
2577 ev_start (EV_A_ (W)w, 1); 3100 ev_start (EV_A_ (W)w, 1);
2578 3101
2579 EV_FREQUENT_CHECK; 3102 EV_FREQUENT_CHECK;
2580} 3103}
… …
2750 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3273 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2751 } 3274 }
2752 } 3275 }
2753} 3276}
2754 3277
3278static void
3279embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3280{
3281 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3282
3283 ev_embed_stop (EV_A_ w);
3284
3285 {
3286 struct ev_loop *loop = w->other;
3287
3288 ev_loop_fork (EV_A);
3289 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3290 }
3291
3292 ev_embed_start (EV_A_ w);
3293}
3294
2755#if 0 3295#if 0
2756static void 3296static void
2757embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3297embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2758{ 3298{
2759 ev_idle_stop (EV_A_ idle); 3299 ev_idle_stop (EV_A_ idle);
… …
2766 if (expect_false (ev_is_active (w))) 3306 if (expect_false (ev_is_active (w)))
2767 return; 3307 return;
2768 3308
2769 { 3309 {
2770 struct ev_loop *loop = w->other; 3310 struct ev_loop *loop = w->other;
2771 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3311 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2772 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3312 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2773 } 3313 }
2774 3314
2775 EV_FREQUENT_CHECK; 3315 EV_FREQUENT_CHECK;
2776 3316
… …
2779 3319
2780 ev_prepare_init (&w->prepare, embed_prepare_cb); 3320 ev_prepare_init (&w->prepare, embed_prepare_cb);
2781 ev_set_priority (&w->prepare, EV_MINPRI); 3321 ev_set_priority (&w->prepare, EV_MINPRI);
2782 ev_prepare_start (EV_A_ &w->prepare); 3322 ev_prepare_start (EV_A_ &w->prepare);
2783 3323
3324 ev_fork_init (&w->fork, embed_fork_cb);
3325 ev_fork_start (EV_A_ &w->fork);
3326
2784 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 3327 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2785 3328
2786 ev_start (EV_A_ (W)w, 1); 3329 ev_start (EV_A_ (W)w, 1);
2787 3330
2788 EV_FREQUENT_CHECK; 3331 EV_FREQUENT_CHECK;
… …
2795 if (expect_false (!ev_is_active (w))) 3338 if (expect_false (!ev_is_active (w)))
2796 return; 3339 return;
2797 3340
2798 EV_FREQUENT_CHECK; 3341 EV_FREQUENT_CHECK;
2799 3342
2800 ev_io_stop (EV_A_ &w->io); 3343 ev_io_stop (EV_A_ &w->io);
2801 ev_prepare_stop (EV_A_ &w->prepare); 3344 ev_prepare_stop (EV_A_ &w->prepare);
2802 3345 ev_fork_stop (EV_A_ &w->fork);
2803 ev_stop (EV_A_ (W)w);
2804 3346
2805 EV_FREQUENT_CHECK; 3347 EV_FREQUENT_CHECK;
2806} 3348}
2807#endif 3349#endif
2808 3350
… …
2905once_cb (EV_P_ struct ev_once *once, int revents) 3447once_cb (EV_P_ struct ev_once *once, int revents)
2906{ 3448{
2907 void (*cb)(int revents, void *arg) = once->cb; 3449 void (*cb)(int revents, void *arg) = once->cb;
2908 void *arg = once->arg; 3450 void *arg = once->arg;
2909 3451
2910 ev_io_stop (EV_A_ &once->io); 3452 ev_io_stop (EV_A_ &once->io);
2911 ev_timer_stop (EV_A_ &once->to); 3453 ev_timer_stop (EV_A_ &once->to);
2912 ev_free (once); 3454 ev_free (once);
2913 3455
2914 cb (revents, arg); 3456 cb (revents, arg);
2915} 3457}
2916 3458
2917static void 3459static void
2918once_cb_io (EV_P_ ev_io *w, int revents) 3460once_cb_io (EV_P_ ev_io *w, int revents)
2919{ 3461{
2920 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3462 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3463
3464 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2921} 3465}
2922 3466
2923static void 3467static void
2924once_cb_to (EV_P_ ev_timer *w, int revents) 3468once_cb_to (EV_P_ ev_timer *w, int revents)
2925{ 3469{
2926 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3470 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3471
3472 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2927} 3473}
2928 3474
2929void 3475void
2930ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3476ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2931{ 3477{
… …
2953 ev_timer_set (&once->to, timeout, 0.); 3499 ev_timer_set (&once->to, timeout, 0.);
2954 ev_timer_start (EV_A_ &once->to); 3500 ev_timer_start (EV_A_ &once->to);
2955 } 3501 }
2956} 3502}
2957 3503
3504/*****************************************************************************/
3505
3506#if EV_WALK_ENABLE
3507void
3508ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3509{
3510 int i, j;
3511 ev_watcher_list *wl, *wn;
3512
3513 if (types & (EV_IO | EV_EMBED))
3514 for (i = 0; i < anfdmax; ++i)
3515 for (wl = anfds [i].head; wl; )
3516 {
3517 wn = wl->next;
3518
3519#if EV_EMBED_ENABLE
3520 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3521 {
3522 if (types & EV_EMBED)
3523 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3524 }
3525 else
3526#endif
3527#if EV_USE_INOTIFY
3528 if (ev_cb ((ev_io *)wl) == infy_cb)
3529 ;
3530 else
3531#endif
3532 if ((ev_io *)wl != &pipe_w)
3533 if (types & EV_IO)
3534 cb (EV_A_ EV_IO, wl);
3535
3536 wl = wn;
3537 }
3538
3539 if (types & (EV_TIMER | EV_STAT))
3540 for (i = timercnt + HEAP0; i-- > HEAP0; )
3541#if EV_STAT_ENABLE
3542 /*TODO: timer is not always active*/
3543 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3544 {
3545 if (types & EV_STAT)
3546 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3547 }
3548 else
3549#endif
3550 if (types & EV_TIMER)
3551 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3552
3553#if EV_PERIODIC_ENABLE
3554 if (types & EV_PERIODIC)
3555 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3556 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3557#endif
3558
3559#if EV_IDLE_ENABLE
3560 if (types & EV_IDLE)
3561 for (j = NUMPRI; i--; )
3562 for (i = idlecnt [j]; i--; )
3563 cb (EV_A_ EV_IDLE, idles [j][i]);
3564#endif
3565
3566#if EV_FORK_ENABLE
3567 if (types & EV_FORK)
3568 for (i = forkcnt; i--; )
3569 if (ev_cb (forks [i]) != embed_fork_cb)
3570 cb (EV_A_ EV_FORK, forks [i]);
3571#endif
3572
3573#if EV_ASYNC_ENABLE
3574 if (types & EV_ASYNC)
3575 for (i = asynccnt; i--; )
3576 cb (EV_A_ EV_ASYNC, asyncs [i]);
3577#endif
3578
3579 if (types & EV_PREPARE)
3580 for (i = preparecnt; i--; )
3581#if EV_EMBED_ENABLE
3582 if (ev_cb (prepares [i]) != embed_prepare_cb)
3583#endif
3584 cb (EV_A_ EV_PREPARE, prepares [i]);
3585
3586 if (types & EV_CHECK)
3587 for (i = checkcnt; i--; )
3588 cb (EV_A_ EV_CHECK, checks [i]);
3589
3590 if (types & EV_SIGNAL)
3591 for (i = 0; i < signalmax; ++i)
3592 for (wl = signals [i].head; wl; )
3593 {
3594 wn = wl->next;
3595 cb (EV_A_ EV_SIGNAL, wl);
3596 wl = wn;
3597 }
3598
3599 if (types & EV_CHILD)
3600 for (i = EV_PID_HASHSIZE; i--; )
3601 for (wl = childs [i]; wl; )
3602 {
3603 wn = wl->next;
3604 cb (EV_A_ EV_CHILD, wl);
3605 wl = wn;
3606 }
3607/* EV_STAT 0x00001000 /* stat data changed */
3608/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3609}
3610#endif
3611
2958#if EV_MULTIPLICITY 3612#if EV_MULTIPLICITY
2959 #include "ev_wrap.h" 3613 #include "ev_wrap.h"
2960#endif 3614#endif
2961 3615
2962#ifdef __cplusplus 3616#ifdef __cplusplus

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