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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.364 by root, Sun Oct 24 21:51:03 2010 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
45# include "config.h"
46# endif
47
48# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0
53# endif
54# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1
56# endif
57# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL)
59# define EV_USE_CLOCK_SYSCALL 0
60# endif
61
62# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC
64# define EV_USE_MONOTONIC 1
65# endif
66# ifndef EV_USE_REALTIME
67# define EV_USE_REALTIME 0
68# endif
69# else
70# ifndef EV_USE_MONOTONIC
71# define EV_USE_MONOTONIC 0
72# endif
73# ifndef EV_USE_REALTIME
74# define EV_USE_REALTIME 0
75# endif
76# endif
77
78# if HAVE_NANOSLEEP
79# ifndef EV_USE_NANOSLEEP
80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
82# else
83# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0
85# endif
86
87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
90# endif
91# else
92# undef EV_USE_SELECT
93# define EV_USE_SELECT 0
94# endif
95
96# if HAVE_POLL && HAVE_POLL_H
97# ifndef EV_USE_POLL
98# define EV_USE_POLL EV_FEATURE_BACKENDS
99# endif
100# else
101# undef EV_USE_POLL
102# define EV_USE_POLL 0
103# endif
104
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# ifndef EV_USE_EPOLL
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
112# endif
113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
121# endif
122
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# ifndef EV_USE_PORT
125# define EV_USE_PORT EV_FEATURE_BACKENDS
126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
130# endif
131
132# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
133# ifndef EV_USE_INOTIFY
134# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif
136# else
137# undef EV_USE_INOTIFY
138# define EV_USE_INOTIFY 0
139# endif
140
141# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
142# ifndef EV_USE_SIGNALFD
143# define EV_USE_SIGNALFD EV_FEATURE_OS
144# endif
145# else
146# undef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD 0
148# endif
149
150# if HAVE_EVENTFD
151# ifndef EV_USE_EVENTFD
152# define EV_USE_EVENTFD EV_FEATURE_OS
153# endif
154# else
155# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0
157# endif
158
159#endif
160
1#include <math.h> 161#include <math.h>
2#include <stdlib.h> 162#include <stdlib.h>
163#include <string.h>
164#include <fcntl.h>
165#include <stddef.h>
3 166
4#include <stdio.h> 167#include <stdio.h>
5 168
169#include <assert.h>
6#include <errno.h> 170#include <errno.h>
7#include <sys/time.h> 171#include <sys/types.h>
8#include <time.h> 172#include <time.h>
173#include <limits.h>
9 174
175#include <signal.h>
176
177#ifdef EV_H
178# include EV_H
179#else
180# include "ev.h"
181#endif
182
183EV_CPP(extern "C" {)
184
185#ifndef _WIN32
186# include <sys/time.h>
187# include <sys/wait.h>
188# include <unistd.h>
189#else
190# include <io.h>
191# define WIN32_LEAN_AND_MEAN
192# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1
195# endif
196# undef EV_AVOID_STDIO
197#endif
198
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */
208
209/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG)
211/* use what's provided */
212#elif defined (NSIG)
213# define EV_NSIG (NSIG)
214#elif defined(_NSIG)
215# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX)
217# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX)
219# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX)
221# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG)
223# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG)
225# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE)
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig)
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else
231# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */
234# define EV_NSIG 65
235#endif
236
237#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else
241# define EV_USE_CLOCK_SYSCALL 0
242# endif
243#endif
244
245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
249# define EV_USE_MONOTONIC 0
250# endif
251#endif
252
253#ifndef EV_USE_REALTIME
254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
255#endif
256
257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
261# define EV_USE_NANOSLEEP 0
262# endif
263#endif
264
265#ifndef EV_USE_SELECT
266# define EV_USE_SELECT EV_FEATURE_BACKENDS
267#endif
268
269#ifndef EV_USE_POLL
270# ifdef _WIN32
271# define EV_USE_POLL 0
272# else
273# define EV_USE_POLL EV_FEATURE_BACKENDS
274# endif
275#endif
276
277#ifndef EV_USE_EPOLL
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
280# else
281# define EV_USE_EPOLL 0
282# endif
283#endif
284
285#ifndef EV_USE_KQUEUE
286# define EV_USE_KQUEUE 0
287#endif
288
289#ifndef EV_USE_PORT
290# define EV_USE_PORT 0
291#endif
292
293#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS
296# else
297# define EV_USE_INOTIFY 0
298# endif
299#endif
300
301#ifndef EV_PID_HASHSIZE
302# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
303#endif
304
305#ifndef EV_INOTIFY_HASHSIZE
306# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
307#endif
308
309#ifndef EV_USE_EVENTFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_EVENTFD EV_FEATURE_OS
312# else
313# define EV_USE_EVENTFD 0
314# endif
315#endif
316
317#ifndef EV_USE_SIGNALFD
318# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
319# define EV_USE_SIGNALFD EV_FEATURE_OS
320# else
321# define EV_USE_SIGNALFD 0
322# endif
323#endif
324
325#if 0 /* debugging */
326# define EV_VERIFY 3
327# define EV_USE_4HEAP 1
328# define EV_HEAP_CACHE_AT 1
329#endif
330
331#ifndef EV_VERIFY
332# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
333#endif
334
335#ifndef EV_USE_4HEAP
336# define EV_USE_4HEAP EV_FEATURE_DATA
337#endif
338
339#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif
342
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h>
347# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1
351# else
352# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0
354# endif
355#endif
356
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
10#ifdef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC
11# define HAVE_MONOTONIC 1 367# define EV_USE_MONOTONIC 0
368#endif
369
370#ifndef CLOCK_REALTIME
371# undef EV_USE_REALTIME
372# define EV_USE_REALTIME 0
373#endif
374
375#if !EV_STAT_ENABLE
376# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0
378#endif
379
380#if !EV_USE_NANOSLEEP
381# ifndef _WIN32
382# include <sys/select.h>
12#endif 383# endif
384#endif
13 385
14#define HAVE_EPOLL 1 386#if EV_USE_INOTIFY
15#define HAVE_REALTIME 1 387# include <sys/statfs.h>
16#define HAVE_SELECT 0 388# include <sys/inotify.h>
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0
393# endif
394#endif
17 395
18#define MAX_BLOCKTIME 60. 396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif
19 399
20#include "ev.h" 400#if EV_USE_EVENTFD
401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
402# include <stdint.h>
403# ifndef EFD_NONBLOCK
404# define EFD_NONBLOCK O_NONBLOCK
405# endif
406# ifndef EFD_CLOEXEC
407# ifdef O_CLOEXEC
408# define EFD_CLOEXEC O_CLOEXEC
409# else
410# define EFD_CLOEXEC 02000000
411# endif
412# endif
413EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
414#endif
21 415
22struct ev_watcher { 416#if EV_USE_SIGNALFD
23 EV_WATCHER (ev_watcher); 417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef SFD_NONBLOCK
420# define SFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef SFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define SFD_CLOEXEC O_CLOEXEC
425# else
426# define SFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
430
431struct signalfd_siginfo
432{
433 uint32_t ssi_signo;
434 char pad[128 - sizeof (uint32_t)];
24}; 435};
436#endif
25 437
26struct ev_watcher_list { 438/**/
27 EV_WATCHER_LIST (ev_watcher_list);
28};
29 439
440#if EV_VERIFY >= 3
441# define EV_FREQUENT_CHECK ev_verify (EV_A)
442#else
443# define EV_FREQUENT_CHECK do { } while (0)
444#endif
445
446/*
447 * This is used to avoid floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */
454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
455
456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
458
459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
461
462#if __GNUC__ >= 4
463# define expect(expr,value) __builtin_expect ((expr),(value))
464# define noinline __attribute__ ((noinline))
465#else
466# define expect(expr,value) (expr)
467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif
471#endif
472
473#define expect_false(expr) expect ((expr) != 0, 0)
474#define expect_true(expr) expect ((expr) != 0, 1)
475#define inline_size static inline
476
477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
480# define inline_speed static noinline
481#endif
482
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484
485#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0)
487#else
488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
490
491#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493
494typedef ev_watcher *W;
495typedef ev_watcher_list *WL;
496typedef ev_watcher_time *WT;
497
498#define ev_active(w) ((W)(w))->active
499#define ev_at(w) ((WT)(w))->at
500
501#if EV_USE_REALTIME
502/* sig_atomic_t is used to avoid per-thread variables or locking but still */
503/* giving it a reasonably high chance of working on typical architectures */
504static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
505#endif
506
507#if EV_USE_MONOTONIC
508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
509#endif
510
511#ifndef EV_FD_TO_WIN32_HANDLE
512# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
513#endif
514#ifndef EV_WIN32_HANDLE_TO_FD
515# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
516#endif
517#ifndef EV_WIN32_CLOSE_FD
518# define EV_WIN32_CLOSE_FD(fd) close (fd)
519#endif
520
521#ifdef _WIN32
522# include "ev_win32.c"
523#endif
524
525/*****************************************************************************/
526
527#ifdef __linux
528# include <sys/utsname.h>
529#endif
530
531static unsigned int noinline
532ev_linux_version (void)
533{
534#ifdef __linux
535 unsigned int v = 0;
536 struct utsname buf;
537 int i;
538 char *p = buf.release;
539
540 if (uname (&buf))
541 return 0;
542
543 for (i = 3+1; --i; )
544 {
545 unsigned int c = 0;
546
547 for (;;)
548 {
549 if (*p >= '0' && *p <= '9')
550 c = c * 10 + *p++ - '0';
551 else
552 {
553 p += *p == '.';
554 break;
555 }
556 }
557
558 v = (v << 8) | c;
559 }
560
561 return v;
562#else
563 return 0;
564#endif
565}
566
567/*****************************************************************************/
568
569#if EV_AVOID_STDIO
570static void noinline
571ev_printerr (const char *msg)
572{
573 write (STDERR_FILENO, msg, strlen (msg));
574}
575#endif
576
577static void (*syserr_cb)(const char *msg);
578
579void
580ev_set_syserr_cb (void (*cb)(const char *msg))
581{
582 syserr_cb = cb;
583}
584
585static void noinline
586ev_syserr (const char *msg)
587{
588 if (!msg)
589 msg = "(libev) system error";
590
591 if (syserr_cb)
592 syserr_cb (msg);
593 else
594 {
595#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg);
599 ev_printerr (": ");
600 ev_printerr (err);
601 ev_printerr ("\n");
602#else
603 perror (msg);
604#endif
605 abort ();
606 }
607}
608
609static void *
610ev_realloc_emul (void *ptr, long size)
611{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
615 /* some systems, notably openbsd and darwin, fail to properly
616 * implement realloc (x, 0) (as required by both ansi c-89 and
617 * the single unix specification, so work around them here.
618 */
619
620 if (size)
621 return realloc (ptr, size);
622
623 free (ptr);
624 return 0;
625#endif
626}
627
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
629
630void
631ev_set_allocator (void *(*cb)(void *ptr, long size))
632{
633 alloc = cb;
634}
635
636inline_speed void *
637ev_realloc (void *ptr, long size)
638{
639 ptr = alloc (ptr, size);
640
641 if (!ptr && size)
642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
648 abort ();
649 }
650
651 return ptr;
652}
653
654#define ev_malloc(size) ev_realloc (0, (size))
655#define ev_free(ptr) ev_realloc ((ptr), 0)
656
657/*****************************************************************************/
658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
663typedef struct
664{
665 WL head;
666 unsigned char events; /* the events watched for */
667 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
669 unsigned char unused;
670#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif
673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
674 SOCKET handle;
675#endif
676#if EV_USE_IOCP
677 OVERLAPPED or, ow;
678#endif
679} ANFD;
680
681/* stores the pending event set for a given watcher */
682typedef struct
683{
684 W w;
685 int events; /* the pending event set for the given watcher */
686} ANPENDING;
687
688#if EV_USE_INOTIFY
689/* hash table entry per inotify-id */
690typedef struct
691{
692 WL head;
693} ANFS;
694#endif
695
696/* Heap Entry */
697#if EV_HEAP_CACHE_AT
698 /* a heap element */
699 typedef struct {
700 ev_tstamp at;
701 WT w;
702 } ANHE;
703
704 #define ANHE_w(he) (he).w /* access watcher, read-write */
705 #define ANHE_at(he) (he).at /* access cached at, read-only */
706 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
707#else
708 /* a heap element */
709 typedef WT ANHE;
710
711 #define ANHE_w(he) (he)
712 #define ANHE_at(he) (he)->at
713 #define ANHE_at_cache(he)
714#endif
715
716#if EV_MULTIPLICITY
717
718 struct ev_loop
719 {
720 ev_tstamp ev_rt_now;
721 #define ev_rt_now ((loop)->ev_rt_now)
722 #define VAR(name,decl) decl;
723 #include "ev_vars.h"
724 #undef VAR
725 };
726 #include "ev_wrap.h"
727
728 static struct ev_loop default_loop_struct;
729 struct ev_loop *ev_default_loop_ptr;
730
731#else
732
30ev_tstamp ev_now; 733 ev_tstamp ev_rt_now;
31int ev_method; 734 #define VAR(name,decl) static decl;
735 #include "ev_vars.h"
736 #undef VAR
32 737
33static int have_monotonic; /* runtime */ 738 static int ev_default_loop_ptr;
34 739
35static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 740#endif
36static void (*method_reify)(void);
37static void (*method_poll)(ev_tstamp timeout);
38 741
742#if EV_FEATURE_API
743# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
744# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
745# define EV_INVOKE_PENDING invoke_cb (EV_A)
746#else
747# define EV_RELEASE_CB (void)0
748# define EV_ACQUIRE_CB (void)0
749# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
750#endif
751
752#define EVBREAK_RECURSE 0x80
753
754/*****************************************************************************/
755
756#ifndef EV_HAVE_EV_TIME
39ev_tstamp 757ev_tstamp
40ev_time (void) 758ev_time (void)
41{ 759{
42#if HAVE_REALTIME 760#if EV_USE_REALTIME
761 if (expect_true (have_realtime))
762 {
43 struct timespec ts; 763 struct timespec ts;
44 clock_gettime (CLOCK_REALTIME, &ts); 764 clock_gettime (CLOCK_REALTIME, &ts);
45 return ts.tv_sec + ts.tv_nsec * 1e-9; 765 return ts.tv_sec + ts.tv_nsec * 1e-9;
46#else 766 }
767#endif
768
47 struct timeval tv; 769 struct timeval tv;
48 gettimeofday (&tv, 0); 770 gettimeofday (&tv, 0);
49 return tv.tv_sec + tv.tv_usec * 1e-6; 771 return tv.tv_sec + tv.tv_usec * 1e-6;
50#endif
51} 772}
773#endif
52 774
53static ev_tstamp 775inline_size ev_tstamp
54get_clock (void) 776get_clock (void)
55{ 777{
56#if HAVE_MONOTONIC 778#if EV_USE_MONOTONIC
57 if (have_monotonic) 779 if (expect_true (have_monotonic))
58 { 780 {
59 struct timespec ts; 781 struct timespec ts;
60 clock_gettime (CLOCK_MONOTONIC, &ts); 782 clock_gettime (CLOCK_MONOTONIC, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 783 return ts.tv_sec + ts.tv_nsec * 1e-9;
62 } 784 }
63#endif 785#endif
64 786
65 return ev_time (); 787 return ev_time ();
66} 788}
67 789
790#if EV_MULTIPLICITY
791ev_tstamp
792ev_now (EV_P)
793{
794 return ev_rt_now;
795}
796#endif
797
798void
799ev_sleep (ev_tstamp delay)
800{
801 if (delay > 0.)
802 {
803#if EV_USE_NANOSLEEP
804 struct timespec ts;
805
806 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0);
808#elif defined(_WIN32)
809 Sleep ((unsigned long)(delay * 1e3));
810#else
811 struct timeval tv;
812
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
814 /* something not guaranteed by newer posix versions, but guaranteed */
815 /* by older ones */
816 EV_TV_SET (tv, delay);
817 select (0, 0, 0, 0, &tv);
818#endif
819 }
820}
821
822/*****************************************************************************/
823
824#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
825
826/* find a suitable new size for the given array, */
827/* hopefully by rounding to a nice-to-malloc size */
828inline_size int
829array_nextsize (int elem, int cur, int cnt)
830{
831 int ncur = cur + 1;
832
833 do
834 ncur <<= 1;
835 while (cnt > ncur);
836
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
839 {
840 ncur *= elem;
841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
842 ncur = ncur - sizeof (void *) * 4;
843 ncur /= elem;
844 }
845
846 return ncur;
847}
848
849static noinline void *
850array_realloc (int elem, void *base, int *cur, int cnt)
851{
852 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur);
854}
855
856#define array_init_zero(base,count) \
857 memset ((void *)(base), 0, sizeof (*(base)) * (count))
858
68#define array_needsize(base,cur,cnt,init) \ 859#define array_needsize(type,base,cur,cnt,init) \
69 if ((cnt) > cur) \ 860 if (expect_false ((cnt) > (cur))) \
70 { \ 861 { \
71 int newcnt = cur ? cur << 1 : 16; \ 862 int ocur_ = (cur); \
72 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 863 (base) = (type *)array_realloc \
73 base = realloc (base, sizeof (*base) * (newcnt)); \ 864 (sizeof (type), (base), &(cur), (cnt)); \
74 init (base + cur, newcnt - cur); \ 865 init ((base) + (ocur_), (cur) - ocur_); \
75 cur = newcnt; \ 866 }
867
868#if 0
869#define array_slim(type,stem) \
870 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
871 { \
872 stem ## max = array_roundsize (stem ## cnt >> 1); \
873 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
874 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
875 }
876#endif
877
878#define array_free(stem, idx) \
879 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
880
881/*****************************************************************************/
882
883/* dummy callback for pending events */
884static void noinline
885pendingcb (EV_P_ ev_prepare *w, int revents)
886{
887}
888
889void noinline
890ev_feed_event (EV_P_ void *w, int revents)
891{
892 W w_ = (W)w;
893 int pri = ABSPRI (w_);
894
895 if (expect_false (w_->pending))
896 pendings [pri][w_->pending - 1].events |= revents;
897 else
898 {
899 w_->pending = ++pendingcnt [pri];
900 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
901 pendings [pri][w_->pending - 1].w = w_;
902 pendings [pri][w_->pending - 1].events = revents;
903 }
904}
905
906inline_speed void
907feed_reverse (EV_P_ W w)
908{
909 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
910 rfeeds [rfeedcnt++] = w;
911}
912
913inline_size void
914feed_reverse_done (EV_P_ int revents)
915{
916 do
917 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
918 while (rfeedcnt);
919}
920
921inline_speed void
922queue_events (EV_P_ W *events, int eventcnt, int type)
923{
924 int i;
925
926 for (i = 0; i < eventcnt; ++i)
927 ev_feed_event (EV_A_ events [i], type);
928}
929
930/*****************************************************************************/
931
932inline_speed void
933fd_event_nocheck (EV_P_ int fd, int revents)
934{
935 ANFD *anfd = anfds + fd;
936 ev_io *w;
937
938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
939 {
940 int ev = w->events & revents;
941
942 if (ev)
943 ev_feed_event (EV_A_ (W)w, ev);
944 }
945}
946
947/* do not submit kernel events for fds that have reify set */
948/* because that means they changed while we were polling for new events */
949inline_speed void
950fd_event (EV_P_ int fd, int revents)
951{
952 ANFD *anfd = anfds + fd;
953
954 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents);
956}
957
958void
959ev_feed_fd_event (EV_P_ int fd, int revents)
960{
961 if (fd >= 0 && fd < anfdmax)
962 fd_event_nocheck (EV_A_ fd, revents);
963}
964
965/* make sure the external fd watch events are in-sync */
966/* with the kernel/libev internal state */
967inline_size void
968fd_reify (EV_P)
969{
970 int i;
971
972 for (i = 0; i < fdchangecnt; ++i)
973 {
974 int fd = fdchanges [i];
975 ANFD *anfd = anfds + fd;
976 ev_io *w;
977
978 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify;
980
981 anfd->reify = 0;
982
983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
985 {
986 unsigned long arg;
987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 {
995 anfd->events = 0;
996
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
998 anfd->events |= (unsigned char)w->events;
999
1000 if (o_events != anfd->events)
1001 o_reify = EV__IOFDSET; /* actually |= */
1002 }
1003
1004 if (o_reify & EV__IOFDSET)
1005 backend_modify (EV_A_ fd, o_events, anfd->events);
1006 }
1007
1008 fdchangecnt = 0;
1009}
1010
1011/* something about the given fd changed */
1012inline_size void
1013fd_change (EV_P_ int fd, int flags)
1014{
1015 unsigned char reify = anfds [fd].reify;
1016 anfds [fd].reify |= flags;
1017
1018 if (expect_true (!reify))
1019 {
1020 ++fdchangecnt;
1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1022 fdchanges [fdchangecnt - 1] = fd;
1023 }
1024}
1025
1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void
1028fd_kill (EV_P_ int fd)
1029{
1030 ev_io *w;
1031
1032 while ((w = (ev_io *)anfds [fd].head))
1033 {
1034 ev_io_stop (EV_A_ w);
1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1036 }
1037}
1038
1039/* check whether the given fd is actually valid, for error recovery */
1040inline_size int
1041fd_valid (int fd)
1042{
1043#ifdef _WIN32
1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045#else
1046 return fcntl (fd, F_GETFD) != -1;
1047#endif
1048}
1049
1050/* called on EBADF to verify fds */
1051static void noinline
1052fd_ebadf (EV_P)
1053{
1054 int fd;
1055
1056 for (fd = 0; fd < anfdmax; ++fd)
1057 if (anfds [fd].events)
1058 if (!fd_valid (fd) && errno == EBADF)
1059 fd_kill (EV_A_ fd);
1060}
1061
1062/* called on ENOMEM in select/poll to kill some fds and retry */
1063static void noinline
1064fd_enomem (EV_P)
1065{
1066 int fd;
1067
1068 for (fd = anfdmax; fd--; )
1069 if (anfds [fd].events)
1070 {
1071 fd_kill (EV_A_ fd);
1072 break;
76 } 1073 }
1074}
77 1075
1076/* usually called after fork if backend needs to re-arm all fds from scratch */
1077static void noinline
1078fd_rearm_all (EV_P)
1079{
1080 int fd;
1081
1082 for (fd = 0; fd < anfdmax; ++fd)
1083 if (anfds [fd].events)
1084 {
1085 anfds [fd].events = 0;
1086 anfds [fd].emask = 0;
1087 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1088 }
1089}
1090
1091/* used to prepare libev internal fd's */
1092/* this is not fork-safe */
1093inline_speed void
1094fd_intern (int fd)
1095{
1096#ifdef _WIN32
1097 unsigned long arg = 1;
1098 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1099#else
1100 fcntl (fd, F_SETFD, FD_CLOEXEC);
1101 fcntl (fd, F_SETFL, O_NONBLOCK);
1102#endif
1103}
1104
1105/*****************************************************************************/
1106
1107/*
1108 * the heap functions want a real array index. array index 0 is guaranteed to not
1109 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1110 * the branching factor of the d-tree.
1111 */
1112
1113/*
1114 * at the moment we allow libev the luxury of two heaps,
1115 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1116 * which is more cache-efficient.
1117 * the difference is about 5% with 50000+ watchers.
1118 */
1119#if EV_USE_4HEAP
1120
1121#define DHEAP 4
1122#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1123#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1124#define UPHEAP_DONE(p,k) ((p) == (k))
1125
1126/* away from the root */
1127inline_speed void
1128downheap (ANHE *heap, int N, int k)
1129{
1130 ANHE he = heap [k];
1131 ANHE *E = heap + N + HEAP0;
1132
1133 for (;;)
1134 {
1135 ev_tstamp minat;
1136 ANHE *minpos;
1137 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1138
1139 /* find minimum child */
1140 if (expect_true (pos + DHEAP - 1 < E))
1141 {
1142 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1143 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1144 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1145 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1146 }
1147 else if (pos < E)
1148 {
1149 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1150 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1151 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1152 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1153 }
1154 else
1155 break;
1156
1157 if (ANHE_at (he) <= minat)
1158 break;
1159
1160 heap [k] = *minpos;
1161 ev_active (ANHE_w (*minpos)) = k;
1162
1163 k = minpos - heap;
1164 }
1165
1166 heap [k] = he;
1167 ev_active (ANHE_w (he)) = k;
1168}
1169
1170#else /* 4HEAP */
1171
1172#define HEAP0 1
1173#define HPARENT(k) ((k) >> 1)
1174#define UPHEAP_DONE(p,k) (!(p))
1175
1176/* away from the root */
1177inline_speed void
1178downheap (ANHE *heap, int N, int k)
1179{
1180 ANHE he = heap [k];
1181
1182 for (;;)
1183 {
1184 int c = k << 1;
1185
1186 if (c >= N + HEAP0)
1187 break;
1188
1189 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1190 ? 1 : 0;
1191
1192 if (ANHE_at (he) <= ANHE_at (heap [c]))
1193 break;
1194
1195 heap [k] = heap [c];
1196 ev_active (ANHE_w (heap [k])) = k;
1197
1198 k = c;
1199 }
1200
1201 heap [k] = he;
1202 ev_active (ANHE_w (he)) = k;
1203}
1204#endif
1205
1206/* towards the root */
1207inline_speed void
1208upheap (ANHE *heap, int k)
1209{
1210 ANHE he = heap [k];
1211
1212 for (;;)
1213 {
1214 int p = HPARENT (k);
1215
1216 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1217 break;
1218
1219 heap [k] = heap [p];
1220 ev_active (ANHE_w (heap [k])) = k;
1221 k = p;
1222 }
1223
1224 heap [k] = he;
1225 ev_active (ANHE_w (he)) = k;
1226}
1227
1228/* move an element suitably so it is in a correct place */
1229inline_size void
1230adjustheap (ANHE *heap, int N, int k)
1231{
1232 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1233 upheap (heap, k);
1234 else
1235 downheap (heap, N, k);
1236}
1237
1238/* rebuild the heap: this function is used only once and executed rarely */
1239inline_size void
1240reheap (ANHE *heap, int N)
1241{
1242 int i;
1243
1244 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1245 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1246 for (i = 0; i < N; ++i)
1247 upheap (heap, i + HEAP0);
1248}
1249
1250/*****************************************************************************/
1251
1252/* associate signal watchers to a signal signal */
78typedef struct 1253typedef struct
79{ 1254{
80 struct ev_io *head; 1255 EV_ATOMIC_T pending;
81 unsigned char wev, rev; /* want, received event set */ 1256#if EV_MULTIPLICITY
82} ANFD; 1257 EV_P;
1258#endif
1259 WL head;
1260} ANSIG;
83 1261
84static ANFD *anfds; 1262static ANSIG signals [EV_NSIG - 1];
85static int anfdmax;
86 1263
87static int *fdchanges; 1264/*****************************************************************************/
88static int fdchangemax, fdchangecnt;
89 1265
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267
1268static void noinline
1269evpipe_init (EV_P)
1270{
1271 if (!ev_is_active (&pipe_w))
1272 {
1273# if EV_USE_EVENTFD
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL)
1276 evfd = eventfd (0, 0);
1277
1278 if (evfd >= 0)
1279 {
1280 evpipe [0] = -1;
1281 fd_intern (evfd); /* doing it twice doesn't hurt */
1282 ev_io_set (&pipe_w, evfd, EV_READ);
1283 }
1284 else
1285# endif
1286 {
1287 while (pipe (evpipe))
1288 ev_syserr ("(libev) error creating signal/async pipe");
1289
1290 fd_intern (evpipe [0]);
1291 fd_intern (evpipe [1]);
1292 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1293 }
1294
1295 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 }
1298}
1299
1300inline_size void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{
1303 if (!*flag)
1304 {
1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309
1310#if EV_USE_EVENTFD
1311 if (evfd >= 0)
1312 {
1313 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t));
1315 }
1316 else
1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1323 write (evpipe [1], &dummy, 1);
1324
1325 errno = old_errno;
1326 }
1327}
1328
1329/* called whenever the libev signal pipe */
1330/* got some events (signal, async) */
90static void 1331static void
91anfds_init (ANFD *base, int count) 1332pipecb (EV_P_ ev_io *iow, int revents)
92{ 1333{
93 while (count--) 1334 int i;
94 { 1335
95 base->head = 0; 1336#if EV_USE_EVENTFD
96 base->wev = base->rev = EV_NONE; 1337 if (evfd >= 0)
97 ++base;
98 } 1338 {
99} 1339 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t));
1341 }
1342 else
1343#endif
1344 {
1345 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1347 read (evpipe [0], &dummy, 1);
1348 }
100 1349
101typedef struct 1350 if (sig_pending)
102{ 1351 {
103 struct ev_watcher *w; 1352 sig_pending = 0;
104 int events;
105} ANPENDING;
106 1353
107static ANPENDING *pendings; 1354 for (i = EV_NSIG - 1; i--; )
108static int pendingmax, pendingcnt; 1355 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1);
1357 }
1358
1359#if EV_ASYNC_ENABLE
1360 if (async_pending)
1361 {
1362 async_pending = 0;
1363
1364 for (i = asynccnt; i--; )
1365 if (asyncs [i]->sent)
1366 {
1367 asyncs [i]->sent = 0;
1368 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1369 }
1370 }
1371#endif
1372}
1373
1374/*****************************************************************************/
109 1375
110static void 1376static void
111event (struct ev_watcher *w, int events) 1377ev_sighandler (int signum)
112{ 1378{
113 w->pending = ++pendingcnt; 1379#if EV_MULTIPLICITY
114 array_needsize (pendings, pendingmax, pendingcnt, ); 1380 EV_P = signals [signum - 1].loop;
115 pendings [pendingcnt - 1].w = w; 1381#endif
116 pendings [pendingcnt - 1].events = events;
117}
118 1382
1383#ifdef _WIN32
1384 signal (signum, ev_sighandler);
1385#endif
1386
1387 signals [signum - 1].pending = 1;
1388 evpipe_write (EV_A_ &sig_pending);
1389}
1390
1391void noinline
1392ev_feed_signal_event (EV_P_ int signum)
1393{
1394 WL w;
1395
1396 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return;
1398
1399 --signum;
1400
1401#if EV_MULTIPLICITY
1402 /* it is permissible to try to feed a signal to the wrong loop */
1403 /* or, likely more useful, feeding a signal nobody is waiting for */
1404
1405 if (expect_false (signals [signum].loop != EV_A))
1406 return;
1407#endif
1408
1409 signals [signum].pending = 0;
1410
1411 for (w = signals [signum].head; w; w = w->next)
1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1413}
1414
1415#if EV_USE_SIGNALFD
119static void 1416static void
120fd_event (int fd, int events) 1417sigfdcb (EV_P_ ev_io *iow, int revents)
121{ 1418{
122 ANFD *anfd = anfds + fd; 1419 struct signalfd_siginfo si[2], *sip; /* these structs are big */
123 struct ev_io *w;
124 1420
125 for (w = anfd->head; w; w = w->next) 1421 for (;;)
126 {
127 int ev = w->events & events;
128
129 if (ev)
130 event ((struct ev_watcher *)w, ev);
131 } 1422 {
132} 1423 ssize_t res = read (sigfd, si, sizeof (si));
133 1424
134static struct ev_timer **timers; 1425 /* not ISO-C, as res might be -1, but works with SuS */
135static int timermax, timercnt; 1426 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1427 ev_feed_signal_event (EV_A_ sip->ssi_signo);
136 1428
1429 if (res < (ssize_t)sizeof (si))
1430 break;
1431 }
1432}
1433#endif
1434
1435#endif
1436
1437/*****************************************************************************/
1438
1439#if EV_CHILD_ENABLE
1440static WL childs [EV_PID_HASHSIZE];
1441
1442static ev_signal childev;
1443
1444#ifndef WIFCONTINUED
1445# define WIFCONTINUED(status) 0
1446#endif
1447
1448/* handle a single child status event */
1449inline_speed void
1450child_reap (EV_P_ int chain, int pid, int status)
1451{
1452 ev_child *w;
1453 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1454
1455 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1456 {
1457 if ((w->pid == pid || !w->pid)
1458 && (!traced || (w->flags & 1)))
1459 {
1460 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1461 w->rpid = pid;
1462 w->rstatus = status;
1463 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1464 }
1465 }
1466}
1467
1468#ifndef WCONTINUED
1469# define WCONTINUED 0
1470#endif
1471
1472/* called on sigchld etc., calls waitpid */
137static void 1473static void
138upheap (int k) 1474childcb (EV_P_ ev_signal *sw, int revents)
139{ 1475{
140 struct ev_timer *w = timers [k]; 1476 int pid, status;
141 1477
142 while (k && timers [k >> 1]->at > w->at) 1478 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1479 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1480 if (!WCONTINUED
1481 || errno != EINVAL
1482 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1483 return;
1484
1485 /* make sure we are called again until all children have been reaped */
1486 /* we need to do it this way so that the callback gets called before we continue */
1487 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1488
1489 child_reap (EV_A_ pid, pid, status);
1490 if ((EV_PID_HASHSIZE) > 1)
1491 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1492}
1493
1494#endif
1495
1496/*****************************************************************************/
1497
1498#if EV_USE_IOCP
1499# include "ev_iocp.c"
1500#endif
1501#if EV_USE_PORT
1502# include "ev_port.c"
1503#endif
1504#if EV_USE_KQUEUE
1505# include "ev_kqueue.c"
1506#endif
1507#if EV_USE_EPOLL
1508# include "ev_epoll.c"
1509#endif
1510#if EV_USE_POLL
1511# include "ev_poll.c"
1512#endif
1513#if EV_USE_SELECT
1514# include "ev_select.c"
1515#endif
1516
1517int
1518ev_version_major (void)
1519{
1520 return EV_VERSION_MAJOR;
1521}
1522
1523int
1524ev_version_minor (void)
1525{
1526 return EV_VERSION_MINOR;
1527}
1528
1529/* return true if we are running with elevated privileges and should ignore env variables */
1530int inline_size
1531enable_secure (void)
1532{
1533#ifdef _WIN32
1534 return 0;
1535#else
1536 return getuid () != geteuid ()
1537 || getgid () != getegid ();
1538#endif
1539}
1540
1541unsigned int
1542ev_supported_backends (void)
1543{
1544 unsigned int flags = 0;
1545
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1548 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1549 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1551
1552 return flags;
1553}
1554
1555unsigned int
1556ev_recommended_backends (void)
1557{
1558 unsigned int flags = ev_supported_backends ();
1559
1560#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */
1562 /* it usually doesn't work correctly on anything but sockets and pipes */
1563 flags &= ~EVBACKEND_KQUEUE;
1564#endif
1565#ifdef __APPLE__
1566 /* only select works correctly on that "unix-certified" platform */
1567 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1568 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1569#endif
1570#ifdef __FreeBSD__
1571 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1572#endif
1573
1574 return flags;
1575}
1576
1577unsigned int
1578ev_embeddable_backends (void)
1579{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1584 flags &= ~EVBACKEND_EPOLL;
1585
1586 return flags;
1587}
1588
1589unsigned int
1590ev_backend (EV_P)
1591{
1592 return backend;
1593}
1594
1595#if EV_FEATURE_API
1596unsigned int
1597ev_iteration (EV_P)
1598{
1599 return loop_count;
1600}
1601
1602unsigned int
1603ev_depth (EV_P)
1604{
1605 return loop_depth;
1606}
1607
1608void
1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1610{
1611 io_blocktime = interval;
1612}
1613
1614void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1616{
1617 timeout_blocktime = interval;
1618}
1619
1620void
1621ev_set_userdata (EV_P_ void *data)
1622{
1623 userdata = data;
1624}
1625
1626void *
1627ev_userdata (EV_P)
1628{
1629 return userdata;
1630}
1631
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633{
1634 invoke_cb = invoke_pending_cb;
1635}
1636
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1638{
1639 release_cb = release;
1640 acquire_cb = acquire;
1641}
1642#endif
1643
1644/* initialise a loop structure, must be zero-initialised */
1645static void noinline
1646loop_init (EV_P_ unsigned int flags)
1647{
1648 if (!backend)
1649 {
1650#if EV_USE_REALTIME
1651 if (!have_realtime)
1652 {
1653 struct timespec ts;
1654
1655 if (!clock_gettime (CLOCK_REALTIME, &ts))
1656 have_realtime = 1;
1657 }
1658#endif
1659
1660#if EV_USE_MONOTONIC
1661 if (!have_monotonic)
1662 {
1663 struct timespec ts;
1664
1665 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1666 have_monotonic = 1;
1667 }
1668#endif
1669
1670 /* pid check not overridable via env */
1671#ifndef _WIN32
1672 if (flags & EVFLAG_FORKCHECK)
1673 curpid = getpid ();
1674#endif
1675
1676 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS"));
1680
1681 ev_rt_now = ev_time ();
1682 mn_now = get_clock ();
1683 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending;
1687#endif
1688
1689 io_blocktime = 0.;
1690 timeout_blocktime = 0.;
1691 backend = 0;
1692 backend_fd = -1;
1693 sig_pending = 0;
1694#if EV_ASYNC_ENABLE
1695 async_pending = 0;
1696#endif
1697#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif
1700#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif
1703
1704 if (!(flags & 0x0000ffffU))
1705 flags |= ev_recommended_backends ();
1706
1707#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif
1710#if EV_USE_PORT
1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1712#endif
1713#if EV_USE_KQUEUE
1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1715#endif
1716#if EV_USE_EPOLL
1717 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1718#endif
1719#if EV_USE_POLL
1720 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1721#endif
1722#if EV_USE_SELECT
1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1724#endif
1725
1726 ev_prepare_init (&pending_w, pendingcb);
1727
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1729 ev_init (&pipe_w, pipecb);
1730 ev_set_priority (&pipe_w, EV_MAXPRI);
1731#endif
1732 }
1733}
1734
1735/* free up a loop structure */
1736void
1737ev_loop_destroy (EV_P)
1738{
1739 int i;
1740
1741#if EV_MULTIPLICITY
1742 /* mimic free (0) */
1743 if (!EV_A)
1744 return;
1745#endif
1746
1747#if EV_CLEANUP_ENABLE
1748 /* queue cleanup watchers (and execute them) */
1749 if (expect_false (cleanupcnt))
1750 {
1751 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1752 EV_INVOKE_PENDING;
1753 }
1754#endif
1755
1756#if EV_CHILD_ENABLE
1757 if (ev_is_active (&childev))
1758 {
1759 ev_ref (EV_A); /* child watcher */
1760 ev_signal_stop (EV_A_ &childev);
1761 }
1762#endif
1763
1764 if (ev_is_active (&pipe_w))
1765 {
1766 /*ev_ref (EV_A);*/
1767 /*ev_io_stop (EV_A_ &pipe_w);*/
1768
1769#if EV_USE_EVENTFD
1770 if (evfd >= 0)
1771 close (evfd);
1772#endif
1773
1774 if (evpipe [0] >= 0)
1775 {
1776 EV_WIN32_CLOSE_FD (evpipe [0]);
1777 EV_WIN32_CLOSE_FD (evpipe [1]);
1778 }
1779 }
1780
1781#if EV_USE_SIGNALFD
1782 if (ev_is_active (&sigfd_w))
1783 close (sigfd);
1784#endif
1785
1786#if EV_USE_INOTIFY
1787 if (fs_fd >= 0)
1788 close (fs_fd);
1789#endif
1790
1791 if (backend_fd >= 0)
1792 close (backend_fd);
1793
1794#if EV_USE_IOCP
1795 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1796#endif
1797#if EV_USE_PORT
1798 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1799#endif
1800#if EV_USE_KQUEUE
1801 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1802#endif
1803#if EV_USE_EPOLL
1804 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1805#endif
1806#if EV_USE_POLL
1807 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1808#endif
1809#if EV_USE_SELECT
1810 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1811#endif
1812
1813 for (i = NUMPRI; i--; )
1814 {
1815 array_free (pending, [i]);
1816#if EV_IDLE_ENABLE
1817 array_free (idle, [i]);
1818#endif
1819 }
1820
1821 ev_free (anfds); anfds = 0; anfdmax = 0;
1822
1823 /* have to use the microsoft-never-gets-it-right macro */
1824 array_free (rfeed, EMPTY);
1825 array_free (fdchange, EMPTY);
1826 array_free (timer, EMPTY);
1827#if EV_PERIODIC_ENABLE
1828 array_free (periodic, EMPTY);
1829#endif
1830#if EV_FORK_ENABLE
1831 array_free (fork, EMPTY);
1832#endif
1833#if EV_CLEANUP_ENABLE
1834 array_free (cleanup, EMPTY);
1835#endif
1836 array_free (prepare, EMPTY);
1837 array_free (check, EMPTY);
1838#if EV_ASYNC_ENABLE
1839 array_free (async, EMPTY);
1840#endif
1841
1842 backend = 0;
1843
1844#if EV_MULTIPLICITY
1845 if (ev_is_default_loop (EV_A))
1846#endif
1847 ev_default_loop_ptr = 0;
1848#if EV_MULTIPLICITY
1849 else
1850 ev_free (EV_A);
1851#endif
1852}
1853
1854#if EV_USE_INOTIFY
1855inline_size void infy_fork (EV_P);
1856#endif
1857
1858inline_size void
1859loop_fork (EV_P)
1860{
1861#if EV_USE_PORT
1862 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1863#endif
1864#if EV_USE_KQUEUE
1865 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1866#endif
1867#if EV_USE_EPOLL
1868 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1869#endif
1870#if EV_USE_INOTIFY
1871 infy_fork (EV_A);
1872#endif
1873
1874 if (ev_is_active (&pipe_w))
1875 {
1876 /* this "locks" the handlers against writing to the pipe */
1877 /* while we modify the fd vars */
1878 sig_pending = 1;
1879#if EV_ASYNC_ENABLE
1880 async_pending = 1;
1881#endif
1882
1883 ev_ref (EV_A);
1884 ev_io_stop (EV_A_ &pipe_w);
1885
1886#if EV_USE_EVENTFD
1887 if (evfd >= 0)
1888 close (evfd);
1889#endif
1890
1891 if (evpipe [0] >= 0)
1892 {
1893 EV_WIN32_CLOSE_FD (evpipe [0]);
1894 EV_WIN32_CLOSE_FD (evpipe [1]);
1895 }
1896
1897#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1898 evpipe_init (EV_A);
1899 /* now iterate over everything, in case we missed something */
1900 pipecb (EV_A_ &pipe_w, EV_READ);
1901#endif
1902 }
1903
1904 postfork = 0;
1905}
1906
1907#if EV_MULTIPLICITY
1908
1909struct ev_loop *
1910ev_loop_new (unsigned int flags)
1911{
1912 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1913
1914 memset (EV_A, 0, sizeof (struct ev_loop));
1915 loop_init (EV_A_ flags);
1916
1917 if (ev_backend (EV_A))
1918 return EV_A;
1919
1920 ev_free (EV_A);
1921 return 0;
1922}
1923
1924#endif /* multiplicity */
1925
1926#if EV_VERIFY
1927static void noinline
1928verify_watcher (EV_P_ W w)
1929{
1930 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1931
1932 if (w->pending)
1933 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1934}
1935
1936static void noinline
1937verify_heap (EV_P_ ANHE *heap, int N)
1938{
1939 int i;
1940
1941 for (i = HEAP0; i < N + HEAP0; ++i)
1942 {
1943 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1944 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1945 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1946
1947 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1948 }
1949}
1950
1951static void noinline
1952array_verify (EV_P_ W *ws, int cnt)
1953{
1954 while (cnt--)
1955 {
1956 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1957 verify_watcher (EV_A_ ws [cnt]);
1958 }
1959}
1960#endif
1961
1962#if EV_FEATURE_API
1963void
1964ev_verify (EV_P)
1965{
1966#if EV_VERIFY
1967 int i;
1968 WL w;
1969
1970 assert (activecnt >= -1);
1971
1972 assert (fdchangemax >= fdchangecnt);
1973 for (i = 0; i < fdchangecnt; ++i)
1974 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1975
1976 assert (anfdmax >= 0);
1977 for (i = 0; i < anfdmax; ++i)
1978 for (w = anfds [i].head; w; w = w->next)
143 { 1979 {
144 timers [k] = timers [k >> 1]; 1980 verify_watcher (EV_A_ (W)w);
145 timers [k]->active = k + 1; 1981 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
146 k >>= 1; 1982 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
147 } 1983 }
148 1984
149 timers [k] = w; 1985 assert (timermax >= timercnt);
150 timers [k]->active = k + 1; 1986 verify_heap (EV_A_ timers, timercnt);
151 1987
152} 1988#if EV_PERIODIC_ENABLE
1989 assert (periodicmax >= periodiccnt);
1990 verify_heap (EV_A_ periodics, periodiccnt);
1991#endif
153 1992
154static void 1993 for (i = NUMPRI; i--; )
155downheap (int k) 1994 {
156{ 1995 assert (pendingmax [i] >= pendingcnt [i]);
157 struct ev_timer *w = timers [k]; 1996#if EV_IDLE_ENABLE
1997 assert (idleall >= 0);
1998 assert (idlemax [i] >= idlecnt [i]);
1999 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2000#endif
2001 }
158 2002
159 while (k < (timercnt >> 1)) 2003#if EV_FORK_ENABLE
2004 assert (forkmax >= forkcnt);
2005 array_verify (EV_A_ (W *)forks, forkcnt);
2006#endif
2007
2008#if EV_CLEANUP_ENABLE
2009 assert (cleanupmax >= cleanupcnt);
2010 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2011#endif
2012
2013#if EV_ASYNC_ENABLE
2014 assert (asyncmax >= asynccnt);
2015 array_verify (EV_A_ (W *)asyncs, asynccnt);
2016#endif
2017
2018#if EV_PREPARE_ENABLE
2019 assert (preparemax >= preparecnt);
2020 array_verify (EV_A_ (W *)prepares, preparecnt);
2021#endif
2022
2023#if EV_CHECK_ENABLE
2024 assert (checkmax >= checkcnt);
2025 array_verify (EV_A_ (W *)checks, checkcnt);
2026#endif
2027
2028# if 0
2029#if EV_CHILD_ENABLE
2030 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2031 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2032#endif
2033# endif
2034#endif
2035}
2036#endif
2037
2038#if EV_MULTIPLICITY
2039struct ev_loop *
2040#else
2041int
2042#endif
2043ev_default_loop (unsigned int flags)
2044{
2045 if (!ev_default_loop_ptr)
2046 {
2047#if EV_MULTIPLICITY
2048 EV_P = ev_default_loop_ptr = &default_loop_struct;
2049#else
2050 ev_default_loop_ptr = 1;
2051#endif
2052
2053 loop_init (EV_A_ flags);
2054
2055 if (ev_backend (EV_A))
2056 {
2057#if EV_CHILD_ENABLE
2058 ev_signal_init (&childev, childcb, SIGCHLD);
2059 ev_set_priority (&childev, EV_MAXPRI);
2060 ev_signal_start (EV_A_ &childev);
2061 ev_unref (EV_A); /* child watcher should not keep loop alive */
2062#endif
2063 }
2064 else
2065 ev_default_loop_ptr = 0;
2066 }
2067
2068 return ev_default_loop_ptr;
2069}
2070
2071void
2072ev_loop_fork (EV_P)
2073{
2074 postfork = 1; /* must be in line with ev_default_fork */
2075}
2076
2077/*****************************************************************************/
2078
2079void
2080ev_invoke (EV_P_ void *w, int revents)
2081{
2082 EV_CB_INVOKE ((W)w, revents);
2083}
2084
2085unsigned int
2086ev_pending_count (EV_P)
2087{
2088 int pri;
2089 unsigned int count = 0;
2090
2091 for (pri = NUMPRI; pri--; )
2092 count += pendingcnt [pri];
2093
2094 return count;
2095}
2096
2097void noinline
2098ev_invoke_pending (EV_P)
2099{
2100 int pri;
2101
2102 for (pri = NUMPRI; pri--; )
2103 while (pendingcnt [pri])
160 { 2104 {
161 int j = k << 1; 2105 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
162 2106
163 if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at) 2107 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2108 /* ^ this is no longer true, as pending_w could be here */
2109
2110 p->w->pending = 0;
2111 EV_CB_INVOKE (p->w, p->events);
2112 EV_FREQUENT_CHECK;
2113 }
2114}
2115
2116#if EV_IDLE_ENABLE
2117/* make idle watchers pending. this handles the "call-idle */
2118/* only when higher priorities are idle" logic */
2119inline_size void
2120idle_reify (EV_P)
2121{
2122 if (expect_false (idleall))
2123 {
2124 int pri;
2125
2126 for (pri = NUMPRI; pri--; )
164 ++j; 2127 {
2128 if (pendingcnt [pri])
2129 break;
165 2130
166 if (w->at <= timers [j]->at) 2131 if (idlecnt [pri])
2132 {
2133 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2134 break;
2135 }
2136 }
2137 }
2138}
2139#endif
2140
2141/* make timers pending */
2142inline_size void
2143timers_reify (EV_P)
2144{
2145 EV_FREQUENT_CHECK;
2146
2147 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2148 {
2149 do
2150 {
2151 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2152
2153 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2154
2155 /* first reschedule or stop timer */
2156 if (w->repeat)
2157 {
2158 ev_at (w) += w->repeat;
2159 if (ev_at (w) < mn_now)
2160 ev_at (w) = mn_now;
2161
2162 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2163
2164 ANHE_at_cache (timers [HEAP0]);
2165 downheap (timers, timercnt, HEAP0);
2166 }
2167 else
2168 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2169
2170 EV_FREQUENT_CHECK;
2171 feed_reverse (EV_A_ (W)w);
2172 }
2173 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2174
2175 feed_reverse_done (EV_A_ EV_TIMER);
2176 }
2177}
2178
2179#if EV_PERIODIC_ENABLE
2180/* make periodics pending */
2181inline_size void
2182periodics_reify (EV_P)
2183{
2184 EV_FREQUENT_CHECK;
2185
2186 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2187 {
2188 int feed_count = 0;
2189
2190 do
2191 {
2192 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2193
2194 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2195
2196 /* first reschedule or stop timer */
2197 if (w->reschedule_cb)
2198 {
2199 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2200
2201 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2202
2203 ANHE_at_cache (periodics [HEAP0]);
2204 downheap (periodics, periodiccnt, HEAP0);
2205 }
2206 else if (w->interval)
2207 {
2208 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2209 /* if next trigger time is not sufficiently in the future, put it there */
2210 /* this might happen because of floating point inexactness */
2211 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2212 {
2213 ev_at (w) += w->interval;
2214
2215 /* if interval is unreasonably low we might still have a time in the past */
2216 /* so correct this. this will make the periodic very inexact, but the user */
2217 /* has effectively asked to get triggered more often than possible */
2218 if (ev_at (w) < ev_rt_now)
2219 ev_at (w) = ev_rt_now;
2220 }
2221
2222 ANHE_at_cache (periodics [HEAP0]);
2223 downheap (periodics, periodiccnt, HEAP0);
2224 }
2225 else
2226 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2227
2228 EV_FREQUENT_CHECK;
2229 feed_reverse (EV_A_ (W)w);
2230 }
2231 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2232
2233 feed_reverse_done (EV_A_ EV_PERIODIC);
2234 }
2235}
2236
2237/* simply recalculate all periodics */
2238/* TODO: maybe ensure that at least one event happens when jumping forward? */
2239static void noinline
2240periodics_reschedule (EV_P)
2241{
2242 int i;
2243
2244 /* adjust periodics after time jump */
2245 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2246 {
2247 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2248
2249 if (w->reschedule_cb)
2250 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251 else if (w->interval)
2252 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2253
2254 ANHE_at_cache (periodics [i]);
2255 }
2256
2257 reheap (periodics, periodiccnt);
2258}
2259#endif
2260
2261/* adjust all timers by a given offset */
2262static void noinline
2263timers_reschedule (EV_P_ ev_tstamp adjust)
2264{
2265 int i;
2266
2267 for (i = 0; i < timercnt; ++i)
2268 {
2269 ANHE *he = timers + i + HEAP0;
2270 ANHE_w (*he)->at += adjust;
2271 ANHE_at_cache (*he);
2272 }
2273}
2274
2275/* fetch new monotonic and realtime times from the kernel */
2276/* also detect if there was a timejump, and act accordingly */
2277inline_speed void
2278time_update (EV_P_ ev_tstamp max_block)
2279{
2280#if EV_USE_MONOTONIC
2281 if (expect_true (have_monotonic))
2282 {
2283 int i;
2284 ev_tstamp odiff = rtmn_diff;
2285
2286 mn_now = get_clock ();
2287
2288 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2289 /* interpolate in the meantime */
2290 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2291 {
2292 ev_rt_now = rtmn_diff + mn_now;
2293 return;
2294 }
2295
2296 now_floor = mn_now;
2297 ev_rt_now = ev_time ();
2298
2299 /* loop a few times, before making important decisions.
2300 * on the choice of "4": one iteration isn't enough,
2301 * in case we get preempted during the calls to
2302 * ev_time and get_clock. a second call is almost guaranteed
2303 * to succeed in that case, though. and looping a few more times
2304 * doesn't hurt either as we only do this on time-jumps or
2305 * in the unlikely event of having been preempted here.
2306 */
2307 for (i = 4; --i; )
2308 {
2309 rtmn_diff = ev_rt_now - mn_now;
2310
2311 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2312 return; /* all is well */
2313
2314 ev_rt_now = ev_time ();
2315 mn_now = get_clock ();
2316 now_floor = mn_now;
2317 }
2318
2319 /* no timer adjustment, as the monotonic clock doesn't jump */
2320 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2321# if EV_PERIODIC_ENABLE
2322 periodics_reschedule (EV_A);
2323# endif
2324 }
2325 else
2326#endif
2327 {
2328 ev_rt_now = ev_time ();
2329
2330 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2331 {
2332 /* adjust timers. this is easy, as the offset is the same for all of them */
2333 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2334#if EV_PERIODIC_ENABLE
2335 periodics_reschedule (EV_A);
2336#endif
2337 }
2338
2339 mn_now = ev_rt_now;
2340 }
2341}
2342
2343void
2344ev_run (EV_P_ int flags)
2345{
2346#if EV_FEATURE_API
2347 ++loop_depth;
2348#endif
2349
2350 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2351
2352 loop_done = EVBREAK_CANCEL;
2353
2354 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2355
2356 do
2357 {
2358#if EV_VERIFY >= 2
2359 ev_verify (EV_A);
2360#endif
2361
2362#ifndef _WIN32
2363 if (expect_false (curpid)) /* penalise the forking check even more */
2364 if (expect_false (getpid () != curpid))
2365 {
2366 curpid = getpid ();
2367 postfork = 1;
2368 }
2369#endif
2370
2371#if EV_FORK_ENABLE
2372 /* we might have forked, so queue fork handlers */
2373 if (expect_false (postfork))
2374 if (forkcnt)
2375 {
2376 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2377 EV_INVOKE_PENDING;
2378 }
2379#endif
2380
2381#if EV_PREPARE_ENABLE
2382 /* queue prepare watchers (and execute them) */
2383 if (expect_false (preparecnt))
2384 {
2385 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2386 EV_INVOKE_PENDING;
2387 }
2388#endif
2389
2390 if (expect_false (loop_done))
167 break; 2391 break;
168 2392
169 timers [k] = timers [j]; 2393 /* we might have forked, so reify kernel state if necessary */
170 timers [k]->active = k + 1; 2394 if (expect_false (postfork))
171 k = j; 2395 loop_fork (EV_A);
2396
2397 /* update fd-related kernel structures */
2398 fd_reify (EV_A);
2399
2400 /* calculate blocking time */
2401 {
2402 ev_tstamp waittime = 0.;
2403 ev_tstamp sleeptime = 0.;
2404
2405 /* remember old timestamp for io_blocktime calculation */
2406 ev_tstamp prev_mn_now = mn_now;
2407
2408 /* update time to cancel out callback processing overhead */
2409 time_update (EV_A_ 1e100);
2410
2411 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2412 {
2413 waittime = MAX_BLOCKTIME;
2414
2415 if (timercnt)
2416 {
2417 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2418 if (waittime > to) waittime = to;
2419 }
2420
2421#if EV_PERIODIC_ENABLE
2422 if (periodiccnt)
2423 {
2424 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2425 if (waittime > to) waittime = to;
2426 }
2427#endif
2428
2429 /* don't let timeouts decrease the waittime below timeout_blocktime */
2430 if (expect_false (waittime < timeout_blocktime))
2431 waittime = timeout_blocktime;
2432
2433 /* extra check because io_blocktime is commonly 0 */
2434 if (expect_false (io_blocktime))
2435 {
2436 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2437
2438 if (sleeptime > waittime - backend_fudge)
2439 sleeptime = waittime - backend_fudge;
2440
2441 if (expect_true (sleeptime > 0.))
2442 {
2443 ev_sleep (sleeptime);
2444 waittime -= sleeptime;
2445 }
2446 }
2447 }
2448
2449#if EV_FEATURE_API
2450 ++loop_count;
2451#endif
2452 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2453 backend_poll (EV_A_ waittime);
2454 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2455
2456 /* update ev_rt_now, do magic */
2457 time_update (EV_A_ waittime + sleeptime);
172 } 2458 }
173 2459
174 timers [k] = w; 2460 /* queue pending timers and reschedule them */
175 timers [k]->active = k + 1; 2461 timers_reify (EV_A); /* relative timers called last */
176} 2462#if EV_PERIODIC_ENABLE
177 2463 periodics_reify (EV_A); /* absolute timers called first */
178static struct ev_signal **signals;
179static int signalmax, signalcnt;
180
181static void
182signals_init (struct ev_signal **base, int count)
183{
184 while (count--)
185 *base++ = 0;
186}
187
188#if HAVE_EPOLL
189# include "ev_epoll.c"
190#endif 2464#endif
191#if HAVE_SELECT
192# include "ev_select.c"
193#endif
194 2465
195int ev_init (int flags) 2466#if EV_IDLE_ENABLE
2467 /* queue idle watchers unless other events are pending */
2468 idle_reify (EV_A);
2469#endif
2470
2471#if EV_CHECK_ENABLE
2472 /* queue check watchers, to be executed first */
2473 if (expect_false (checkcnt))
2474 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2475#endif
2476
2477 EV_INVOKE_PENDING;
2478 }
2479 while (expect_true (
2480 activecnt
2481 && !loop_done
2482 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2483 ));
2484
2485 if (loop_done == EVBREAK_ONE)
2486 loop_done = EVBREAK_CANCEL;
2487
2488#if EV_FEATURE_API
2489 --loop_depth;
2490#endif
2491}
2492
2493void
2494ev_break (EV_P_ int how)
196{ 2495{
197#if HAVE_MONOTONIC 2496 loop_done = how;
2497}
2498
2499void
2500ev_ref (EV_P)
2501{
2502 ++activecnt;
2503}
2504
2505void
2506ev_unref (EV_P)
2507{
2508 --activecnt;
2509}
2510
2511void
2512ev_now_update (EV_P)
2513{
2514 time_update (EV_A_ 1e100);
2515}
2516
2517void
2518ev_suspend (EV_P)
2519{
2520 ev_now_update (EV_A);
2521}
2522
2523void
2524ev_resume (EV_P)
2525{
2526 ev_tstamp mn_prev = mn_now;
2527
2528 ev_now_update (EV_A);
2529 timers_reschedule (EV_A_ mn_now - mn_prev);
2530#if EV_PERIODIC_ENABLE
2531 /* TODO: really do this? */
2532 periodics_reschedule (EV_A);
2533#endif
2534}
2535
2536/*****************************************************************************/
2537/* singly-linked list management, used when the expected list length is short */
2538
2539inline_size void
2540wlist_add (WL *head, WL elem)
2541{
2542 elem->next = *head;
2543 *head = elem;
2544}
2545
2546inline_size void
2547wlist_del (WL *head, WL elem)
2548{
2549 while (*head)
2550 {
2551 if (expect_true (*head == elem))
2552 {
2553 *head = elem->next;
2554 break;
2555 }
2556
2557 head = &(*head)->next;
2558 }
2559}
2560
2561/* internal, faster, version of ev_clear_pending */
2562inline_speed void
2563clear_pending (EV_P_ W w)
2564{
2565 if (w->pending)
2566 {
2567 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2568 w->pending = 0;
2569 }
2570}
2571
2572int
2573ev_clear_pending (EV_P_ void *w)
2574{
2575 W w_ = (W)w;
2576 int pending = w_->pending;
2577
2578 if (expect_true (pending))
2579 {
2580 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2581 p->w = (W)&pending_w;
2582 w_->pending = 0;
2583 return p->events;
2584 }
2585 else
2586 return 0;
2587}
2588
2589inline_size void
2590pri_adjust (EV_P_ W w)
2591{
2592 int pri = ev_priority (w);
2593 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2594 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2595 ev_set_priority (w, pri);
2596}
2597
2598inline_speed void
2599ev_start (EV_P_ W w, int active)
2600{
2601 pri_adjust (EV_A_ w);
2602 w->active = active;
2603 ev_ref (EV_A);
2604}
2605
2606inline_size void
2607ev_stop (EV_P_ W w)
2608{
2609 ev_unref (EV_A);
2610 w->active = 0;
2611}
2612
2613/*****************************************************************************/
2614
2615void noinline
2616ev_io_start (EV_P_ ev_io *w)
2617{
2618 int fd = w->fd;
2619
2620 if (expect_false (ev_is_active (w)))
2621 return;
2622
2623 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2624 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2625
2626 EV_FREQUENT_CHECK;
2627
2628 ev_start (EV_A_ (W)w, 1);
2629 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2630 wlist_add (&anfds[fd].head, (WL)w);
2631
2632 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2633 w->events &= ~EV__IOFDSET;
2634
2635 EV_FREQUENT_CHECK;
2636}
2637
2638void noinline
2639ev_io_stop (EV_P_ ev_io *w)
2640{
2641 clear_pending (EV_A_ (W)w);
2642 if (expect_false (!ev_is_active (w)))
2643 return;
2644
2645 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2646
2647 EV_FREQUENT_CHECK;
2648
2649 wlist_del (&anfds[w->fd].head, (WL)w);
2650 ev_stop (EV_A_ (W)w);
2651
2652 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2653
2654 EV_FREQUENT_CHECK;
2655}
2656
2657void noinline
2658ev_timer_start (EV_P_ ev_timer *w)
2659{
2660 if (expect_false (ev_is_active (w)))
2661 return;
2662
2663 ev_at (w) += mn_now;
2664
2665 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2666
2667 EV_FREQUENT_CHECK;
2668
2669 ++timercnt;
2670 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2671 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2672 ANHE_w (timers [ev_active (w)]) = (WT)w;
2673 ANHE_at_cache (timers [ev_active (w)]);
2674 upheap (timers, ev_active (w));
2675
2676 EV_FREQUENT_CHECK;
2677
2678 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2679}
2680
2681void noinline
2682ev_timer_stop (EV_P_ ev_timer *w)
2683{
2684 clear_pending (EV_A_ (W)w);
2685 if (expect_false (!ev_is_active (w)))
2686 return;
2687
2688 EV_FREQUENT_CHECK;
2689
198 { 2690 {
199 struct timespec ts; 2691 int active = ev_active (w);
200 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2692
201 have_monotonic = 1; 2693 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2694
2695 --timercnt;
2696
2697 if (expect_true (active < timercnt + HEAP0))
2698 {
2699 timers [active] = timers [timercnt + HEAP0];
2700 adjustheap (timers, timercnt, active);
2701 }
202 } 2702 }
203#endif
204 2703
205 ev_now = ev_time (); 2704 ev_at (w) -= mn_now;
206 2705
207#if HAVE_EPOLL 2706 ev_stop (EV_A_ (W)w);
208 if (epoll_init (flags))
209 return ev_method;
210#endif
211#if HAVE_SELECT
212 if (select_init (flags))
213 return ev_method;
214#endif
215 2707
216 ev_method = EVMETHOD_NONE; 2708 EV_FREQUENT_CHECK;
217 return ev_method;
218} 2709}
219 2710
220void ev_prefork (void) 2711void noinline
2712ev_timer_again (EV_P_ ev_timer *w)
221{ 2713{
222} 2714 EV_FREQUENT_CHECK;
223 2715
224void ev_postfork_parent (void) 2716 if (ev_is_active (w))
225{
226}
227
228void ev_postfork_child (void)
229{
230#if HAVE_EPOLL
231 epoll_postfork_child ();
232#endif
233}
234
235static void
236call_pending ()
237{
238 int i;
239
240 for (i = 0; i < pendingcnt; ++i)
241 {
242 ANPENDING *p = pendings + i;
243
244 if (p->w)
245 {
246 p->w->pending = 0;
247 p->w->cb (p->w, p->events);
248 }
249 } 2717 {
250
251 pendingcnt = 0;
252}
253
254static void
255timer_reify (void)
256{
257 while (timercnt && timers [0]->at <= ev_now)
258 {
259 struct ev_timer *w = timers [0];
260
261 /* first reschedule timer */
262 if (w->repeat) 2718 if (w->repeat)
263 { 2719 {
264 if (w->is_abs)
265 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266 else
267 w->at = ev_now + w->repeat; 2720 ev_at (w) = mn_now + w->repeat;
268 2721 ANHE_at_cache (timers [ev_active (w)]);
269 downheap (0); 2722 adjustheap (timers, timercnt, ev_active (w));
270 } 2723 }
271 else 2724 else
272 evtimer_stop (w); /* nonrepeating: stop timer */ 2725 ev_timer_stop (EV_A_ w);
273 2726 }
274 event ((struct ev_watcher *)w, EV_TIMEOUT); 2727 else if (w->repeat)
275 } 2728 {
276} 2729 ev_at (w) = w->repeat;
2730 ev_timer_start (EV_A_ w);
2731 }
277 2732
278int ev_loop_done; 2733 EV_FREQUENT_CHECK;
2734}
279 2735
280int ev_loop (int flags) 2736ev_tstamp
2737ev_timer_remaining (EV_P_ ev_timer *w)
281{ 2738{
282 double block; 2739 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
283 ev_loop_done = flags & EVLOOP_ONESHOT; 2740}
284 2741
285 do 2742#if EV_PERIODIC_ENABLE
2743void noinline
2744ev_periodic_start (EV_P_ ev_periodic *w)
2745{
2746 if (expect_false (ev_is_active (w)))
2747 return;
2748
2749 if (w->reschedule_cb)
2750 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2751 else if (w->interval)
2752 {
2753 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2754 /* this formula differs from the one in periodic_reify because we do not always round up */
2755 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2756 }
2757 else
2758 ev_at (w) = w->offset;
2759
2760 EV_FREQUENT_CHECK;
2761
2762 ++periodiccnt;
2763 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2764 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2765 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2766 ANHE_at_cache (periodics [ev_active (w)]);
2767 upheap (periodics, ev_active (w));
2768
2769 EV_FREQUENT_CHECK;
2770
2771 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2772}
2773
2774void noinline
2775ev_periodic_stop (EV_P_ ev_periodic *w)
2776{
2777 clear_pending (EV_A_ (W)w);
2778 if (expect_false (!ev_is_active (w)))
2779 return;
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ev_active (w);
2785
2786 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2787
2788 --periodiccnt;
2789
2790 if (expect_true (active < periodiccnt + HEAP0))
286 { 2791 {
287 /* update fd-related kernel structures */ 2792 periodics [active] = periodics [periodiccnt + HEAP0];
288 method_reify (); fdchangecnt = 0; 2793 adjustheap (periodics, periodiccnt, active);
2794 }
2795 }
289 2796
290 /* calculate blocking time */ 2797 ev_stop (EV_A_ (W)w);
291 ev_now = ev_time ();
292 2798
293 if (flags & EVLOOP_NONBLOCK) 2799 EV_FREQUENT_CHECK;
294 block = 0.; 2800}
295 else if (!timercnt) 2801
296 block = MAX_BLOCKTIME; 2802void noinline
2803ev_periodic_again (EV_P_ ev_periodic *w)
2804{
2805 /* TODO: use adjustheap and recalculation */
2806 ev_periodic_stop (EV_A_ w);
2807 ev_periodic_start (EV_A_ w);
2808}
2809#endif
2810
2811#ifndef SA_RESTART
2812# define SA_RESTART 0
2813#endif
2814
2815#if EV_SIGNAL_ENABLE
2816
2817void noinline
2818ev_signal_start (EV_P_ ev_signal *w)
2819{
2820 if (expect_false (ev_is_active (w)))
2821 return;
2822
2823 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2824
2825#if EV_MULTIPLICITY
2826 assert (("libev: a signal must not be attached to two different loops",
2827 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2828
2829 signals [w->signum - 1].loop = EV_A;
2830#endif
2831
2832 EV_FREQUENT_CHECK;
2833
2834#if EV_USE_SIGNALFD
2835 if (sigfd == -2)
2836 {
2837 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2838 if (sigfd < 0 && errno == EINVAL)
2839 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2840
2841 if (sigfd >= 0)
2842 {
2843 fd_intern (sigfd); /* doing it twice will not hurt */
2844
2845 sigemptyset (&sigfd_set);
2846
2847 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2848 ev_set_priority (&sigfd_w, EV_MAXPRI);
2849 ev_io_start (EV_A_ &sigfd_w);
2850 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2851 }
2852 }
2853
2854 if (sigfd >= 0)
2855 {
2856 /* TODO: check .head */
2857 sigaddset (&sigfd_set, w->signum);
2858 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2859
2860 signalfd (sigfd, &sigfd_set, 0);
2861 }
2862#endif
2863
2864 ev_start (EV_A_ (W)w, 1);
2865 wlist_add (&signals [w->signum - 1].head, (WL)w);
2866
2867 if (!((WL)w)->next)
2868# if EV_USE_SIGNALFD
2869 if (sigfd < 0) /*TODO*/
2870# endif
2871 {
2872# ifdef _WIN32
2873 evpipe_init (EV_A);
2874
2875 signal (w->signum, ev_sighandler);
2876# else
2877 struct sigaction sa;
2878
2879 evpipe_init (EV_A);
2880
2881 sa.sa_handler = ev_sighandler;
2882 sigfillset (&sa.sa_mask);
2883 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2884 sigaction (w->signum, &sa, 0);
2885
2886 sigemptyset (&sa.sa_mask);
2887 sigaddset (&sa.sa_mask, w->signum);
2888 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2889#endif
2890 }
2891
2892 EV_FREQUENT_CHECK;
2893}
2894
2895void noinline
2896ev_signal_stop (EV_P_ ev_signal *w)
2897{
2898 clear_pending (EV_A_ (W)w);
2899 if (expect_false (!ev_is_active (w)))
2900 return;
2901
2902 EV_FREQUENT_CHECK;
2903
2904 wlist_del (&signals [w->signum - 1].head, (WL)w);
2905 ev_stop (EV_A_ (W)w);
2906
2907 if (!signals [w->signum - 1].head)
2908 {
2909#if EV_MULTIPLICITY
2910 signals [w->signum - 1].loop = 0; /* unattach from signal */
2911#endif
2912#if EV_USE_SIGNALFD
2913 if (sigfd >= 0)
2914 {
2915 sigset_t ss;
2916
2917 sigemptyset (&ss);
2918 sigaddset (&ss, w->signum);
2919 sigdelset (&sigfd_set, w->signum);
2920
2921 signalfd (sigfd, &sigfd_set, 0);
2922 sigprocmask (SIG_UNBLOCK, &ss, 0);
2923 }
297 else 2924 else
2925#endif
2926 signal (w->signum, SIG_DFL);
2927 }
2928
2929 EV_FREQUENT_CHECK;
2930}
2931
2932#endif
2933
2934#if EV_CHILD_ENABLE
2935
2936void
2937ev_child_start (EV_P_ ev_child *w)
2938{
2939#if EV_MULTIPLICITY
2940 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2941#endif
2942 if (expect_false (ev_is_active (w)))
2943 return;
2944
2945 EV_FREQUENT_CHECK;
2946
2947 ev_start (EV_A_ (W)w, 1);
2948 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2949
2950 EV_FREQUENT_CHECK;
2951}
2952
2953void
2954ev_child_stop (EV_P_ ev_child *w)
2955{
2956 clear_pending (EV_A_ (W)w);
2957 if (expect_false (!ev_is_active (w)))
2958 return;
2959
2960 EV_FREQUENT_CHECK;
2961
2962 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2963 ev_stop (EV_A_ (W)w);
2964
2965 EV_FREQUENT_CHECK;
2966}
2967
2968#endif
2969
2970#if EV_STAT_ENABLE
2971
2972# ifdef _WIN32
2973# undef lstat
2974# define lstat(a,b) _stati64 (a,b)
2975# endif
2976
2977#define DEF_STAT_INTERVAL 5.0074891
2978#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2979#define MIN_STAT_INTERVAL 0.1074891
2980
2981static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2982
2983#if EV_USE_INOTIFY
2984
2985/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2986# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2987
2988static void noinline
2989infy_add (EV_P_ ev_stat *w)
2990{
2991 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);
2992
2993 if (w->wd >= 0)
2994 {
2995 struct statfs sfs;
2996
2997 /* now local changes will be tracked by inotify, but remote changes won't */
2998 /* unless the filesystem is known to be local, we therefore still poll */
2999 /* also do poll on <2.6.25, but with normal frequency */
3000
3001 if (!fs_2625)
3002 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3003 else if (!statfs (w->path, &sfs)
3004 && (sfs.f_type == 0x1373 /* devfs */
3005 || sfs.f_type == 0xEF53 /* ext2/3 */
3006 || sfs.f_type == 0x3153464a /* jfs */
3007 || sfs.f_type == 0x52654973 /* reiser3 */
3008 || sfs.f_type == 0x01021994 /* tempfs */
3009 || sfs.f_type == 0x58465342 /* xfs */))
3010 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3011 else
3012 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3013 }
3014 else
3015 {
3016 /* can't use inotify, continue to stat */
3017 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3018
3019 /* if path is not there, monitor some parent directory for speedup hints */
3020 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3021 /* but an efficiency issue only */
3022 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
298 { 3023 {
299 block = timers [0]->at - ev_now + method_fudge; 3024 char path [4096];
300 if (block < 0.) block = 0.; 3025 strcpy (path, w->path);
301 else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME; 3026
3027 do
3028 {
3029 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3030 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3031
3032 char *pend = strrchr (path, '/');
3033
3034 if (!pend || pend == path)
3035 break;
3036
3037 *pend = 0;
3038 w->wd = inotify_add_watch (fs_fd, path, mask);
3039 }
3040 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
302 } 3041 }
3042 }
303 3043
304 method_poll (block); 3044 if (w->wd >= 0)
3045 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
305 3046
306 /* put pending timers into pendign queue and reschedule them */ 3047 /* now re-arm timer, if required */
307 timer_reify (); 3048 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3049 ev_timer_again (EV_A_ &w->timer);
3050 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3051}
308 3052
309 ev_now = ev_time (); 3053static void noinline
310 call_pending (); 3054infy_del (EV_P_ ev_stat *w)
3055{
3056 int slot;
3057 int wd = w->wd;
3058
3059 if (wd < 0)
3060 return;
3061
3062 w->wd = -2;
3063 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3064 wlist_del (&fs_hash [slot].head, (WL)w);
3065
3066 /* remove this watcher, if others are watching it, they will rearm */
3067 inotify_rm_watch (fs_fd, wd);
3068}
3069
3070static void noinline
3071infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3072{
3073 if (slot < 0)
3074 /* overflow, need to check for all hash slots */
3075 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3076 infy_wd (EV_A_ slot, wd, ev);
3077 else
311 } 3078 {
312 while (!ev_loop_done); 3079 WL w_;
3080
3081 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3082 {
3083 ev_stat *w = (ev_stat *)w_;
3084 w_ = w_->next; /* lets us remove this watcher and all before it */
3085
3086 if (w->wd == wd || wd == -1)
3087 {
3088 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3089 {
3090 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3091 w->wd = -1;
3092 infy_add (EV_A_ w); /* re-add, no matter what */
3093 }
3094
3095 stat_timer_cb (EV_A_ &w->timer, 0);
3096 }
3097 }
3098 }
313} 3099}
314 3100
315static void 3101static void
316wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) 3102infy_cb (EV_P_ ev_io *w, int revents)
317{ 3103{
318 elem->next = *head; 3104 char buf [EV_INOTIFY_BUFSIZE];
319 *head = elem; 3105 int ofs;
3106 int len = read (fs_fd, buf, sizeof (buf));
3107
3108 for (ofs = 0; ofs < len; )
3109 {
3110 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3111 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3112 ofs += sizeof (struct inotify_event) + ev->len;
3113 }
3114}
3115
3116inline_size void
3117ev_check_2625 (EV_P)
3118{
3119 /* kernels < 2.6.25 are borked
3120 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3121 */
3122 if (ev_linux_version () < 0x020619)
3123 return;
3124
3125 fs_2625 = 1;
3126}
3127
3128inline_size int
3129infy_newfd (void)
3130{
3131#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3132 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3133 if (fd >= 0)
3134 return fd;
3135#endif
3136 return inotify_init ();
3137}
3138
3139inline_size void
3140infy_init (EV_P)
3141{
3142 if (fs_fd != -2)
3143 return;
3144
3145 fs_fd = -1;
3146
3147 ev_check_2625 (EV_A);
3148
3149 fs_fd = infy_newfd ();
3150
3151 if (fs_fd >= 0)
3152 {
3153 fd_intern (fs_fd);
3154 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3155 ev_set_priority (&fs_w, EV_MAXPRI);
3156 ev_io_start (EV_A_ &fs_w);
3157 ev_unref (EV_A);
3158 }
3159}
3160
3161inline_size void
3162infy_fork (EV_P)
3163{
3164 int slot;
3165
3166 if (fs_fd < 0)
3167 return;
3168
3169 ev_ref (EV_A);
3170 ev_io_stop (EV_A_ &fs_w);
3171 close (fs_fd);
3172 fs_fd = infy_newfd ();
3173
3174 if (fs_fd >= 0)
3175 {
3176 fd_intern (fs_fd);
3177 ev_io_set (&fs_w, fs_fd, EV_READ);
3178 ev_io_start (EV_A_ &fs_w);
3179 ev_unref (EV_A);
3180 }
3181
3182 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3183 {
3184 WL w_ = fs_hash [slot].head;
3185 fs_hash [slot].head = 0;
3186
3187 while (w_)
3188 {
3189 ev_stat *w = (ev_stat *)w_;
3190 w_ = w_->next; /* lets us add this watcher */
3191
3192 w->wd = -1;
3193
3194 if (fs_fd >= 0)
3195 infy_add (EV_A_ w); /* re-add, no matter what */
3196 else
3197 {
3198 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3199 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3200 ev_timer_again (EV_A_ &w->timer);
3201 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3202 }
3203 }
3204 }
3205}
3206
3207#endif
3208
3209#ifdef _WIN32
3210# define EV_LSTAT(p,b) _stati64 (p, b)
3211#else
3212# define EV_LSTAT(p,b) lstat (p, b)
3213#endif
3214
3215void
3216ev_stat_stat (EV_P_ ev_stat *w)
3217{
3218 if (lstat (w->path, &w->attr) < 0)
3219 w->attr.st_nlink = 0;
3220 else if (!w->attr.st_nlink)
3221 w->attr.st_nlink = 1;
3222}
3223
3224static void noinline
3225stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3226{
3227 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3228
3229 ev_statdata prev = w->attr;
3230 ev_stat_stat (EV_A_ w);
3231
3232 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3233 if (
3234 prev.st_dev != w->attr.st_dev
3235 || prev.st_ino != w->attr.st_ino
3236 || prev.st_mode != w->attr.st_mode
3237 || prev.st_nlink != w->attr.st_nlink
3238 || prev.st_uid != w->attr.st_uid
3239 || prev.st_gid != w->attr.st_gid
3240 || prev.st_rdev != w->attr.st_rdev
3241 || prev.st_size != w->attr.st_size
3242 || prev.st_atime != w->attr.st_atime
3243 || prev.st_mtime != w->attr.st_mtime
3244 || prev.st_ctime != w->attr.st_ctime
3245 ) {
3246 /* we only update w->prev on actual differences */
3247 /* in case we test more often than invoke the callback, */
3248 /* to ensure that prev is always different to attr */
3249 w->prev = prev;
3250
3251 #if EV_USE_INOTIFY
3252 if (fs_fd >= 0)
3253 {
3254 infy_del (EV_A_ w);
3255 infy_add (EV_A_ w);
3256 ev_stat_stat (EV_A_ w); /* avoid race... */
3257 }
3258 #endif
3259
3260 ev_feed_event (EV_A_ w, EV_STAT);
3261 }
3262}
3263
3264void
3265ev_stat_start (EV_P_ ev_stat *w)
3266{
3267 if (expect_false (ev_is_active (w)))
3268 return;
3269
3270 ev_stat_stat (EV_A_ w);
3271
3272 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3273 w->interval = MIN_STAT_INTERVAL;
3274
3275 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3276 ev_set_priority (&w->timer, ev_priority (w));
3277
3278#if EV_USE_INOTIFY
3279 infy_init (EV_A);
3280
3281 if (fs_fd >= 0)
3282 infy_add (EV_A_ w);
3283 else
3284#endif
3285 {
3286 ev_timer_again (EV_A_ &w->timer);
3287 ev_unref (EV_A);
3288 }
3289
3290 ev_start (EV_A_ (W)w, 1);
3291
3292 EV_FREQUENT_CHECK;
3293}
3294
3295void
3296ev_stat_stop (EV_P_ ev_stat *w)
3297{
3298 clear_pending (EV_A_ (W)w);
3299 if (expect_false (!ev_is_active (w)))
3300 return;
3301
3302 EV_FREQUENT_CHECK;
3303
3304#if EV_USE_INOTIFY
3305 infy_del (EV_A_ w);
3306#endif
3307
3308 if (ev_is_active (&w->timer))
3309 {
3310 ev_ref (EV_A);
3311 ev_timer_stop (EV_A_ &w->timer);
3312 }
3313
3314 ev_stop (EV_A_ (W)w);
3315
3316 EV_FREQUENT_CHECK;
3317}
3318#endif
3319
3320#if EV_IDLE_ENABLE
3321void
3322ev_idle_start (EV_P_ ev_idle *w)
3323{
3324 if (expect_false (ev_is_active (w)))
3325 return;
3326
3327 pri_adjust (EV_A_ (W)w);
3328
3329 EV_FREQUENT_CHECK;
3330
3331 {
3332 int active = ++idlecnt [ABSPRI (w)];
3333
3334 ++idleall;
3335 ev_start (EV_A_ (W)w, active);
3336
3337 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3338 idles [ABSPRI (w)][active - 1] = w;
3339 }
3340
3341 EV_FREQUENT_CHECK;
3342}
3343
3344void
3345ev_idle_stop (EV_P_ ev_idle *w)
3346{
3347 clear_pending (EV_A_ (W)w);
3348 if (expect_false (!ev_is_active (w)))
3349 return;
3350
3351 EV_FREQUENT_CHECK;
3352
3353 {
3354 int active = ev_active (w);
3355
3356 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3357 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3358
3359 ev_stop (EV_A_ (W)w);
3360 --idleall;
3361 }
3362
3363 EV_FREQUENT_CHECK;
3364}
3365#endif
3366
3367#if EV_PREPARE_ENABLE
3368void
3369ev_prepare_start (EV_P_ ev_prepare *w)
3370{
3371 if (expect_false (ev_is_active (w)))
3372 return;
3373
3374 EV_FREQUENT_CHECK;
3375
3376 ev_start (EV_A_ (W)w, ++preparecnt);
3377 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3378 prepares [preparecnt - 1] = w;
3379
3380 EV_FREQUENT_CHECK;
3381}
3382
3383void
3384ev_prepare_stop (EV_P_ ev_prepare *w)
3385{
3386 clear_pending (EV_A_ (W)w);
3387 if (expect_false (!ev_is_active (w)))
3388 return;
3389
3390 EV_FREQUENT_CHECK;
3391
3392 {
3393 int active = ev_active (w);
3394
3395 prepares [active - 1] = prepares [--preparecnt];
3396 ev_active (prepares [active - 1]) = active;
3397 }
3398
3399 ev_stop (EV_A_ (W)w);
3400
3401 EV_FREQUENT_CHECK;
3402}
3403#endif
3404
3405#if EV_CHECK_ENABLE
3406void
3407ev_check_start (EV_P_ ev_check *w)
3408{
3409 if (expect_false (ev_is_active (w)))
3410 return;
3411
3412 EV_FREQUENT_CHECK;
3413
3414 ev_start (EV_A_ (W)w, ++checkcnt);
3415 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3416 checks [checkcnt - 1] = w;
3417
3418 EV_FREQUENT_CHECK;
3419}
3420
3421void
3422ev_check_stop (EV_P_ ev_check *w)
3423{
3424 clear_pending (EV_A_ (W)w);
3425 if (expect_false (!ev_is_active (w)))
3426 return;
3427
3428 EV_FREQUENT_CHECK;
3429
3430 {
3431 int active = ev_active (w);
3432
3433 checks [active - 1] = checks [--checkcnt];
3434 ev_active (checks [active - 1]) = active;
3435 }
3436
3437 ev_stop (EV_A_ (W)w);
3438
3439 EV_FREQUENT_CHECK;
3440}
3441#endif
3442
3443#if EV_EMBED_ENABLE
3444void noinline
3445ev_embed_sweep (EV_P_ ev_embed *w)
3446{
3447 ev_run (w->other, EVRUN_NOWAIT);
320} 3448}
321 3449
322static void 3450static void
323wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) 3451embed_io_cb (EV_P_ ev_io *io, int revents)
324{ 3452{
325 while (*head) 3453 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3454
3455 if (ev_cb (w))
3456 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3457 else
3458 ev_run (w->other, EVRUN_NOWAIT);
3459}
3460
3461static void
3462embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3463{
3464 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3465
3466 {
3467 EV_P = w->other;
3468
3469 while (fdchangecnt)
326 { 3470 {
327 if (*head == elem) 3471 fd_reify (EV_A);
3472 ev_run (EV_A_ EVRUN_NOWAIT);
3473 }
3474 }
3475}
3476
3477static void
3478embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3479{
3480 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3481
3482 ev_embed_stop (EV_A_ w);
3483
3484 {
3485 EV_P = w->other;
3486
3487 ev_loop_fork (EV_A);
3488 ev_run (EV_A_ EVRUN_NOWAIT);
3489 }
3490
3491 ev_embed_start (EV_A_ w);
3492}
3493
3494#if 0
3495static void
3496embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3497{
3498 ev_idle_stop (EV_A_ idle);
3499}
3500#endif
3501
3502void
3503ev_embed_start (EV_P_ ev_embed *w)
3504{
3505 if (expect_false (ev_is_active (w)))
3506 return;
3507
3508 {
3509 EV_P = w->other;
3510 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3511 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3512 }
3513
3514 EV_FREQUENT_CHECK;
3515
3516 ev_set_priority (&w->io, ev_priority (w));
3517 ev_io_start (EV_A_ &w->io);
3518
3519 ev_prepare_init (&w->prepare, embed_prepare_cb);
3520 ev_set_priority (&w->prepare, EV_MINPRI);
3521 ev_prepare_start (EV_A_ &w->prepare);
3522
3523 ev_fork_init (&w->fork, embed_fork_cb);
3524 ev_fork_start (EV_A_ &w->fork);
3525
3526 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3527
3528 ev_start (EV_A_ (W)w, 1);
3529
3530 EV_FREQUENT_CHECK;
3531}
3532
3533void
3534ev_embed_stop (EV_P_ ev_embed *w)
3535{
3536 clear_pending (EV_A_ (W)w);
3537 if (expect_false (!ev_is_active (w)))
3538 return;
3539
3540 EV_FREQUENT_CHECK;
3541
3542 ev_io_stop (EV_A_ &w->io);
3543 ev_prepare_stop (EV_A_ &w->prepare);
3544 ev_fork_stop (EV_A_ &w->fork);
3545
3546 ev_stop (EV_A_ (W)w);
3547
3548 EV_FREQUENT_CHECK;
3549}
3550#endif
3551
3552#if EV_FORK_ENABLE
3553void
3554ev_fork_start (EV_P_ ev_fork *w)
3555{
3556 if (expect_false (ev_is_active (w)))
3557 return;
3558
3559 EV_FREQUENT_CHECK;
3560
3561 ev_start (EV_A_ (W)w, ++forkcnt);
3562 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3563 forks [forkcnt - 1] = w;
3564
3565 EV_FREQUENT_CHECK;
3566}
3567
3568void
3569ev_fork_stop (EV_P_ ev_fork *w)
3570{
3571 clear_pending (EV_A_ (W)w);
3572 if (expect_false (!ev_is_active (w)))
3573 return;
3574
3575 EV_FREQUENT_CHECK;
3576
3577 {
3578 int active = ev_active (w);
3579
3580 forks [active - 1] = forks [--forkcnt];
3581 ev_active (forks [active - 1]) = active;
3582 }
3583
3584 ev_stop (EV_A_ (W)w);
3585
3586 EV_FREQUENT_CHECK;
3587}
3588#endif
3589
3590#if EV_CLEANUP_ENABLE
3591void
3592ev_cleanup_start (EV_P_ ev_cleanup *w)
3593{
3594 if (expect_false (ev_is_active (w)))
3595 return;
3596
3597 EV_FREQUENT_CHECK;
3598
3599 ev_start (EV_A_ (W)w, ++cleanupcnt);
3600 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3601 cleanups [cleanupcnt - 1] = w;
3602
3603 /* cleanup watchers should never keep a refcount on the loop */
3604 ev_unref (EV_A);
3605 EV_FREQUENT_CHECK;
3606}
3607
3608void
3609ev_cleanup_stop (EV_P_ ev_cleanup *w)
3610{
3611 clear_pending (EV_A_ (W)w);
3612 if (expect_false (!ev_is_active (w)))
3613 return;
3614
3615 EV_FREQUENT_CHECK;
3616 ev_ref (EV_A);
3617
3618 {
3619 int active = ev_active (w);
3620
3621 cleanups [active - 1] = cleanups [--cleanupcnt];
3622 ev_active (cleanups [active - 1]) = active;
3623 }
3624
3625 ev_stop (EV_A_ (W)w);
3626
3627 EV_FREQUENT_CHECK;
3628}
3629#endif
3630
3631#if EV_ASYNC_ENABLE
3632void
3633ev_async_start (EV_P_ ev_async *w)
3634{
3635 if (expect_false (ev_is_active (w)))
3636 return;
3637
3638 w->sent = 0;
3639
3640 evpipe_init (EV_A);
3641
3642 EV_FREQUENT_CHECK;
3643
3644 ev_start (EV_A_ (W)w, ++asynccnt);
3645 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3646 asyncs [asynccnt - 1] = w;
3647
3648 EV_FREQUENT_CHECK;
3649}
3650
3651void
3652ev_async_stop (EV_P_ ev_async *w)
3653{
3654 clear_pending (EV_A_ (W)w);
3655 if (expect_false (!ev_is_active (w)))
3656 return;
3657
3658 EV_FREQUENT_CHECK;
3659
3660 {
3661 int active = ev_active (w);
3662
3663 asyncs [active - 1] = asyncs [--asynccnt];
3664 ev_active (asyncs [active - 1]) = active;
3665 }
3666
3667 ev_stop (EV_A_ (W)w);
3668
3669 EV_FREQUENT_CHECK;
3670}
3671
3672void
3673ev_async_send (EV_P_ ev_async *w)
3674{
3675 w->sent = 1;
3676 evpipe_write (EV_A_ &async_pending);
3677}
3678#endif
3679
3680/*****************************************************************************/
3681
3682struct ev_once
3683{
3684 ev_io io;
3685 ev_timer to;
3686 void (*cb)(int revents, void *arg);
3687 void *arg;
3688};
3689
3690static void
3691once_cb (EV_P_ struct ev_once *once, int revents)
3692{
3693 void (*cb)(int revents, void *arg) = once->cb;
3694 void *arg = once->arg;
3695
3696 ev_io_stop (EV_A_ &once->io);
3697 ev_timer_stop (EV_A_ &once->to);
3698 ev_free (once);
3699
3700 cb (revents, arg);
3701}
3702
3703static void
3704once_cb_io (EV_P_ ev_io *w, int revents)
3705{
3706 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3707
3708 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3709}
3710
3711static void
3712once_cb_to (EV_P_ ev_timer *w, int revents)
3713{
3714 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3715
3716 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3717}
3718
3719void
3720ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3721{
3722 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3723
3724 if (expect_false (!once))
3725 {
3726 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3727 return;
3728 }
3729
3730 once->cb = cb;
3731 once->arg = arg;
3732
3733 ev_init (&once->io, once_cb_io);
3734 if (fd >= 0)
3735 {
3736 ev_io_set (&once->io, fd, events);
3737 ev_io_start (EV_A_ &once->io);
3738 }
3739
3740 ev_init (&once->to, once_cb_to);
3741 if (timeout >= 0.)
3742 {
3743 ev_timer_set (&once->to, timeout, 0.);
3744 ev_timer_start (EV_A_ &once->to);
3745 }
3746}
3747
3748/*****************************************************************************/
3749
3750#if EV_WALK_ENABLE
3751void
3752ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3753{
3754 int i, j;
3755 ev_watcher_list *wl, *wn;
3756
3757 if (types & (EV_IO | EV_EMBED))
3758 for (i = 0; i < anfdmax; ++i)
3759 for (wl = anfds [i].head; wl; )
328 { 3760 {
329 *head = elem->next; 3761 wn = wl->next;
330 return; 3762
3763#if EV_EMBED_ENABLE
3764 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3765 {
3766 if (types & EV_EMBED)
3767 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3768 }
3769 else
3770#endif
3771#if EV_USE_INOTIFY
3772 if (ev_cb ((ev_io *)wl) == infy_cb)
3773 ;
3774 else
3775#endif
3776 if ((ev_io *)wl != &pipe_w)
3777 if (types & EV_IO)
3778 cb (EV_A_ EV_IO, wl);
3779
3780 wl = wn;
331 } 3781 }
332 3782
333 head = &(*head)->next; 3783 if (types & (EV_TIMER | EV_STAT))
334 } 3784 for (i = timercnt + HEAP0; i-- > HEAP0; )
335} 3785#if EV_STAT_ENABLE
336 3786 /*TODO: timer is not always active*/
337static void 3787 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
338ev_start (struct ev_watcher *w, int active) 3788 {
339{ 3789 if (types & EV_STAT)
340 w->pending = 0; 3790 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
341 w->active = active; 3791 }
342}
343
344static void
345ev_stop (struct ev_watcher *w)
346{
347 if (w->pending)
348 pendings [w->pending - 1].w = 0;
349
350 w->active = 0;
351 /* nop */
352}
353
354void
355evio_start (struct ev_io *w)
356{
357 if (ev_is_active (w))
358 return;
359
360 int fd = w->fd;
361
362 ev_start ((struct ev_watcher *)w, 1);
363 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
365
366 ++fdchangecnt;
367 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368 fdchanges [fdchangecnt - 1] = fd;
369}
370
371void
372evio_stop (struct ev_io *w)
373{
374 if (!ev_is_active (w))
375 return;
376
377 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
378 ev_stop ((struct ev_watcher *)w);
379
380 ++fdchangecnt;
381 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382 fdchanges [fdchangecnt - 1] = w->fd;
383}
384
385void
386evtimer_start (struct ev_timer *w)
387{
388 if (ev_is_active (w))
389 return;
390
391 if (w->is_abs)
392 {
393 /* this formula differs from the one in timer_reify becuse we do not round up */
394 if (w->repeat)
395 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396 }
397 else 3792 else
398 w->at += ev_now; 3793#endif
3794 if (types & EV_TIMER)
3795 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
399 3796
400 ev_start ((struct ev_watcher *)w, ++timercnt); 3797#if EV_PERIODIC_ENABLE
401 array_needsize (timers, timermax, timercnt, ); 3798 if (types & EV_PERIODIC)
402 timers [timercnt - 1] = w; 3799 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
403 upheap (timercnt - 1); 3800 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
404} 3801#endif
405 3802
406void 3803#if EV_IDLE_ENABLE
407evtimer_stop (struct ev_timer *w) 3804 if (types & EV_IDLE)
408{ 3805 for (j = NUMPRI; i--; )
409 if (!ev_is_active (w)) 3806 for (i = idlecnt [j]; i--; )
410 return; 3807 cb (EV_A_ EV_IDLE, idles [j][i]);
3808#endif
411 3809
412 if (w->active < timercnt--) 3810#if EV_FORK_ENABLE
413 { 3811 if (types & EV_FORK)
414 timers [w->active - 1] = timers [timercnt]; 3812 for (i = forkcnt; i--; )
415 downheap (w->active - 1); 3813 if (ev_cb (forks [i]) != embed_fork_cb)
416 } 3814 cb (EV_A_ EV_FORK, forks [i]);
3815#endif
417 3816
418 ev_stop ((struct ev_watcher *)w); 3817#if EV_ASYNC_ENABLE
419} 3818 if (types & EV_ASYNC)
3819 for (i = asynccnt; i--; )
3820 cb (EV_A_ EV_ASYNC, asyncs [i]);
3821#endif
420 3822
421void 3823#if EV_PREPARE_ENABLE
422evsignal_start (struct ev_signal *w) 3824 if (types & EV_PREPARE)
423{ 3825 for (i = preparecnt; i--; )
424 if (ev_is_active (w)) 3826# if EV_EMBED_ENABLE
425 return; 3827 if (ev_cb (prepares [i]) != embed_prepare_cb)
426
427 ev_start ((struct ev_watcher *)w, 1);
428 array_needsize (signals, signalmax, w->signum, signals_init);
429 wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
430}
431
432void
433evsignal_stop (struct ev_signal *w)
434{
435 if (!ev_is_active (w))
436 return;
437
438 wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
439 ev_stop ((struct ev_watcher *)w);
440}
441
442/*****************************************************************************/
443#if 1
444
445static void
446sin_cb (struct ev_io *w, int revents)
447{
448 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449}
450
451static void
452ocb (struct ev_timer *w, int revents)
453{
454 fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
455}
456
457int main (void)
458{
459 struct ev_io sin;
460
461 ev_init (0);
462
463 evw_init (&sin, sin_cb, 55);
464 evio_set (&sin, 0, EV_READ);
465 evio_start (&sin);
466
467 struct ev_timer t[1000];
468
469 int i;
470 for (i = 0; i < 1000; ++i)
471 {
472 struct ev_timer *w = t + i;
473 evw_init (w, ocb, i);
474 evtimer_set_rel (w, drand48 (), 0);
475 evtimer_start (w);
476 if (drand48 () < 0.5)
477 evtimer_stop (w);
478 }
479
480 ev_loop (0);
481
482 return 0;
483}
484
485#endif 3828# endif
3829 cb (EV_A_ EV_PREPARE, prepares [i]);
3830#endif
486 3831
3832#if EV_CHECK_ENABLE
3833 if (types & EV_CHECK)
3834 for (i = checkcnt; i--; )
3835 cb (EV_A_ EV_CHECK, checks [i]);
3836#endif
487 3837
3838#if EV_SIGNAL_ENABLE
3839 if (types & EV_SIGNAL)
3840 for (i = 0; i < EV_NSIG - 1; ++i)
3841 for (wl = signals [i].head; wl; )
3842 {
3843 wn = wl->next;
3844 cb (EV_A_ EV_SIGNAL, wl);
3845 wl = wn;
3846 }
3847#endif
488 3848
3849#if EV_CHILD_ENABLE
3850 if (types & EV_CHILD)
3851 for (i = (EV_PID_HASHSIZE); i--; )
3852 for (wl = childs [i]; wl; )
3853 {
3854 wn = wl->next;
3855 cb (EV_A_ EV_CHILD, wl);
3856 wl = wn;
3857 }
3858#endif
3859/* EV_STAT 0x00001000 /* stat data changed */
3860/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3861}
3862#endif
489 3863
3864#if EV_MULTIPLICITY
3865 #include "ev_wrap.h"
3866#endif
3867
3868EV_CPP(})
3869

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