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Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * 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.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 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
33#endif 159#endif
34 160
35#include <math.h> 161#include <math.h>
36#include <stdlib.h> 162#include <stdlib.h>
37#include <unistd.h> 163#include <string.h>
38#include <fcntl.h> 164#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 165#include <stddef.h>
41 166
42#include <stdio.h> 167#include <stdio.h>
43 168
44#include <assert.h> 169#include <assert.h>
45#include <errno.h> 170#include <errno.h>
46#include <sys/types.h> 171#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 172#include <time.h>
173#include <limits.h>
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
50 244
51#ifndef EV_USE_MONOTONIC 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
52# define EV_USE_MONOTONIC 1 350# 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
53#endif 363#endif
54 364
55#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
56# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
57# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
58#endif 368#endif
59 369
60#ifndef EV_USE_SELECT
61# define EV_USE_SELECT 1
62#endif
63
64#ifndef EV_USE_EPOLL
65# define EV_USE_EPOLL 0
66#endif
67
68#ifndef CLOCK_REALTIME 370#ifndef CLOCK_REALTIME
371# undef EV_USE_REALTIME
69# define EV_USE_REALTIME 0 372# define EV_USE_REALTIME 0
70#endif 373#endif
71#ifndef EV_USE_REALTIME 374
72# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 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>
73#endif 383# endif
384#endif
385
386#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h>
389# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0
394# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif
400
401#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h>
404# ifndef EFD_NONBLOCK
405# define EFD_NONBLOCK O_NONBLOCK
406# endif
407# ifndef EFD_CLOEXEC
408# ifdef O_CLOEXEC
409# define EFD_CLOEXEC O_CLOEXEC
410# else
411# define EFD_CLOEXEC 02000000
412# endif
413# endif
414EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
415#endif
416
417#if EV_USE_SIGNALFD
418/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
419# include <stdint.h>
420# ifndef SFD_NONBLOCK
421# define SFD_NONBLOCK O_NONBLOCK
422# endif
423# ifndef SFD_CLOEXEC
424# ifdef O_CLOEXEC
425# define SFD_CLOEXEC O_CLOEXEC
426# else
427# define SFD_CLOEXEC 02000000
428# endif
429# endif
430EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
431
432struct signalfd_siginfo
433{
434 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)];
436};
437#endif
438
439/**/
440
441#if EV_VERIFY >= 3
442# define EV_FREQUENT_CHECK ev_verify (EV_A)
443#else
444# define EV_FREQUENT_CHECK do { } while (0)
445#endif
446
447/*
448 * This is used to avoid floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
74 456
75#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
76#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
77#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
78#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
79 459
80#include "ev.h" 460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
81 462
463#if __GNUC__ >= 4
464# define expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else
467# define expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif
472#endif
473
474#define expect_false(expr) expect ((expr) != 0, 0)
475#define expect_true(expr) expect ((expr) != 0, 1)
476#define inline_size static inline
477
478#if EV_FEATURE_CODE
479# define inline_speed static inline
480#else
481# define inline_speed static noinline
482#endif
483
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485
486#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0)
488#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif
491
492#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494
82typedef struct ev_watcher *W; 495typedef ev_watcher *W;
83typedef struct ev_watcher_list *WL; 496typedef ev_watcher_list *WL;
84typedef struct ev_watcher_time *WT; 497typedef ev_watcher_time *WT;
85 498
86static ev_tstamp now, diff; /* monotonic clock */ 499#define ev_active(w) ((W)(w))->active
87ev_tstamp ev_now; 500#define ev_at(w) ((WT)(w))->at
88int ev_method;
89 501
90static int have_monotonic; /* runtime */ 502#if EV_USE_REALTIME
503/* sig_atomic_t is used to avoid per-thread variables or locking but still */
504/* giving it a reasonably high chance of working on typical architectures */
505static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
506#endif
91 507
92static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 508#if EV_USE_MONOTONIC
93static void (*method_modify)(int fd, int oev, int nev); 509static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
94static void (*method_poll)(ev_tstamp timeout); 510#endif
511
512#ifndef EV_FD_TO_WIN32_HANDLE
513# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
514#endif
515#ifndef EV_WIN32_HANDLE_TO_FD
516# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
517#endif
518#ifndef EV_WIN32_CLOSE_FD
519# define EV_WIN32_CLOSE_FD(fd) close (fd)
520#endif
521
522#ifdef _WIN32
523# include "ev_win32.c"
524#endif
95 525
96/*****************************************************************************/ 526/*****************************************************************************/
97 527
528#if EV_AVOID_STDIO
529static void noinline
530ev_printerr (const char *msg)
531{
532 write (STDERR_FILENO, msg, strlen (msg));
533}
534#endif
535
536static void (*syserr_cb)(const char *msg);
537
538void
539ev_set_syserr_cb (void (*cb)(const char *msg))
540{
541 syserr_cb = cb;
542}
543
544static void noinline
545ev_syserr (const char *msg)
546{
547 if (!msg)
548 msg = "(libev) system error";
549
550 if (syserr_cb)
551 syserr_cb (msg);
552 else
553 {
554#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg);
558 ev_printerr (": ");
559 ev_printerr (err);
560 ev_printerr ("\n");
561#else
562 perror (msg);
563#endif
564 abort ();
565 }
566}
567
568static void *
569ev_realloc_emul (void *ptr, long size)
570{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here.
577 */
578
579 if (size)
580 return realloc (ptr, size);
581
582 free (ptr);
583 return 0;
584#endif
585}
586
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
588
589void
590ev_set_allocator (void *(*cb)(void *ptr, long size))
591{
592 alloc = cb;
593}
594
595inline_speed void *
596ev_realloc (void *ptr, long size)
597{
598 ptr = alloc (ptr, size);
599
600 if (!ptr && size)
601 {
602#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n");
604#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
606#endif
607 abort ();
608 }
609
610 return ptr;
611}
612
613#define ev_malloc(size) ev_realloc (0, (size))
614#define ev_free(ptr) ev_realloc ((ptr), 0)
615
616/*****************************************************************************/
617
618/* set in reify when reification needed */
619#define EV_ANFD_REIFY 1
620
621/* file descriptor info structure */
622typedef struct
623{
624 WL head;
625 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
628 unsigned char unused;
629#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif
632#if EV_SELECT_IS_WINSOCKET
633 SOCKET handle;
634#endif
635} ANFD;
636
637/* stores the pending event set for a given watcher */
638typedef struct
639{
640 W w;
641 int events; /* the pending event set for the given watcher */
642} ANPENDING;
643
644#if EV_USE_INOTIFY
645/* hash table entry per inotify-id */
646typedef struct
647{
648 WL head;
649} ANFS;
650#endif
651
652/* Heap Entry */
653#if EV_HEAP_CACHE_AT
654 /* a heap element */
655 typedef struct {
656 ev_tstamp at;
657 WT w;
658 } ANHE;
659
660 #define ANHE_w(he) (he).w /* access watcher, read-write */
661 #define ANHE_at(he) (he).at /* access cached at, read-only */
662 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
663#else
664 /* a heap element */
665 typedef WT ANHE;
666
667 #define ANHE_w(he) (he)
668 #define ANHE_at(he) (he)->at
669 #define ANHE_at_cache(he)
670#endif
671
672#if EV_MULTIPLICITY
673
674 struct ev_loop
675 {
676 ev_tstamp ev_rt_now;
677 #define ev_rt_now ((loop)->ev_rt_now)
678 #define VAR(name,decl) decl;
679 #include "ev_vars.h"
680 #undef VAR
681 };
682 #include "ev_wrap.h"
683
684 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr;
686
687#else
688
689 ev_tstamp ev_rt_now;
690 #define VAR(name,decl) static decl;
691 #include "ev_vars.h"
692 #undef VAR
693
694 static int ev_default_loop_ptr;
695
696#endif
697
698#if EV_FEATURE_API
699# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
700# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
701# define EV_INVOKE_PENDING invoke_cb (EV_A)
702#else
703# define EV_RELEASE_CB (void)0
704# define EV_ACQUIRE_CB (void)0
705# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
706#endif
707
708#define EVBREAK_RECURSE 0x80
709
710/*****************************************************************************/
711
712#ifndef EV_HAVE_EV_TIME
98ev_tstamp 713ev_tstamp
99ev_time (void) 714ev_time (void)
100{ 715{
101#if EV_USE_REALTIME 716#if EV_USE_REALTIME
717 if (expect_true (have_realtime))
718 {
102 struct timespec ts; 719 struct timespec ts;
103 clock_gettime (CLOCK_REALTIME, &ts); 720 clock_gettime (CLOCK_REALTIME, &ts);
104 return ts.tv_sec + ts.tv_nsec * 1e-9; 721 return ts.tv_sec + ts.tv_nsec * 1e-9;
105#else 722 }
723#endif
724
106 struct timeval tv; 725 struct timeval tv;
107 gettimeofday (&tv, 0); 726 gettimeofday (&tv, 0);
108 return tv.tv_sec + tv.tv_usec * 1e-6; 727 return tv.tv_sec + tv.tv_usec * 1e-6;
109#endif
110} 728}
729#endif
111 730
112static ev_tstamp 731inline_size ev_tstamp
113get_clock (void) 732get_clock (void)
114{ 733{
115#if EV_USE_MONOTONIC 734#if EV_USE_MONOTONIC
116 if (have_monotonic) 735 if (expect_true (have_monotonic))
117 { 736 {
118 struct timespec ts; 737 struct timespec ts;
119 clock_gettime (CLOCK_MONOTONIC, &ts); 738 clock_gettime (CLOCK_MONOTONIC, &ts);
120 return ts.tv_sec + ts.tv_nsec * 1e-9; 739 return ts.tv_sec + ts.tv_nsec * 1e-9;
121 } 740 }
122#endif 741#endif
123 742
124 return ev_time (); 743 return ev_time ();
125} 744}
126 745
127#define array_roundsize(base,n) ((n) | 4 & ~3) 746#if EV_MULTIPLICITY
747ev_tstamp
748ev_now (EV_P)
749{
750 return ev_rt_now;
751}
752#endif
128 753
129#define array_needsize(base,cur,cnt,init) \ 754void
130 if ((cnt) > cur) \ 755ev_sleep (ev_tstamp delay)
131 { \ 756{
132 int newcnt = cur; \ 757 if (delay > 0.)
133 do \
134 { \
135 newcnt = array_roundsize (base, newcnt << 1); \
136 } \
137 while ((cnt) > newcnt); \
138 \
139 base = realloc (base, sizeof (*base) * (newcnt)); \
140 init (base + cur, newcnt - cur); \
141 cur = newcnt; \
142 } 758 {
759#if EV_USE_NANOSLEEP
760 struct timespec ts;
761
762 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0);
764#elif defined(_WIN32)
765 Sleep ((unsigned long)(delay * 1e3));
766#else
767 struct timeval tv;
768
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */
772 EV_TV_SET (tv, delay);
773 select (0, 0, 0, 0, &tv);
774#endif
775 }
776}
143 777
144/*****************************************************************************/ 778/*****************************************************************************/
145 779
146typedef struct 780#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
147{
148 struct ev_io *head;
149 unsigned char events;
150 unsigned char reify;
151} ANFD;
152 781
153static ANFD *anfds; 782/* find a suitable new size for the given array, */
154static int anfdmax; 783/* hopefully by rounding to a nice-to-malloc size */
155 784inline_size int
156static void 785array_nextsize (int elem, int cur, int cnt)
157anfds_init (ANFD *base, int count)
158{ 786{
159 while (count--) 787 int ncur = cur + 1;
160 {
161 base->head = 0;
162 base->events = EV_NONE;
163 base->reify = 0;
164 788
165 ++base; 789 do
790 ncur <<= 1;
791 while (cnt > ncur);
792
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
166 } 795 {
167} 796 ncur *= elem;
168 797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
169typedef struct 798 ncur = ncur - sizeof (void *) * 4;
170{ 799 ncur /= elem;
171 W w;
172 int events;
173} ANPENDING;
174
175static ANPENDING *pendings;
176static int pendingmax, pendingcnt;
177
178static void
179event (W w, int events)
180{
181 if (w->pending)
182 { 800 }
801
802 return ncur;
803}
804
805static noinline void *
806array_realloc (int elem, void *base, int *cur, int cnt)
807{
808 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur);
810}
811
812#define array_init_zero(base,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count))
814
815#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \
817 { \
818 int ocur_ = (cur); \
819 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \
822 }
823
824#if 0
825#define array_slim(type,stem) \
826 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
827 { \
828 stem ## max = array_roundsize (stem ## cnt >> 1); \
829 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
830 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
831 }
832#endif
833
834#define array_free(stem, idx) \
835 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
836
837/*****************************************************************************/
838
839/* dummy callback for pending events */
840static void noinline
841pendingcb (EV_P_ ev_prepare *w, int revents)
842{
843}
844
845void noinline
846ev_feed_event (EV_P_ void *w, int revents)
847{
848 W w_ = (W)w;
849 int pri = ABSPRI (w_);
850
851 if (expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents;
853 else
854 {
855 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
857 pendings [pri][w_->pending - 1].w = w_;
183 pendings [w->pending - 1].events |= events; 858 pendings [pri][w_->pending - 1].events = revents;
184 return;
185 } 859 }
186
187 w->pending = ++pendingcnt;
188 array_needsize (pendings, pendingmax, pendingcnt, );
189 pendings [pendingcnt - 1].w = w;
190 pendings [pendingcnt - 1].events = events;
191} 860}
192 861
193static void 862inline_speed void
863feed_reverse (EV_P_ W w)
864{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
866 rfeeds [rfeedcnt++] = w;
867}
868
869inline_size void
870feed_reverse_done (EV_P_ int revents)
871{
872 do
873 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
874 while (rfeedcnt);
875}
876
877inline_speed void
194queue_events (W *events, int eventcnt, int type) 878queue_events (EV_P_ W *events, int eventcnt, int type)
195{ 879{
196 int i; 880 int i;
197 881
198 for (i = 0; i < eventcnt; ++i) 882 for (i = 0; i < eventcnt; ++i)
199 event (events [i], type); 883 ev_feed_event (EV_A_ events [i], type);
200} 884}
201 885
202static void 886/*****************************************************************************/
887
888inline_speed void
203fd_event (int fd, int events) 889fd_event_nocheck (EV_P_ int fd, int revents)
204{ 890{
205 ANFD *anfd = anfds + fd; 891 ANFD *anfd = anfds + fd;
206 struct ev_io *w; 892 ev_io *w;
207 893
208 for (w = anfd->head; w; w = w->next) 894 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
209 { 895 {
210 int ev = w->events & events; 896 int ev = w->events & revents;
211 897
212 if (ev) 898 if (ev)
213 event ((W)w, ev); 899 ev_feed_event (EV_A_ (W)w, ev);
214 } 900 }
215} 901}
216 902
217/*****************************************************************************/ 903/* do not submit kernel events for fds that have reify set */
904/* because that means they changed while we were polling for new events */
905inline_speed void
906fd_event (EV_P_ int fd, int revents)
907{
908 ANFD *anfd = anfds + fd;
218 909
219static int *fdchanges; 910 if (expect_true (!anfd->reify))
220static int fdchangemax, fdchangecnt; 911 fd_event_nocheck (EV_A_ fd, revents);
912}
221 913
222static void 914void
223fd_reify (void) 915ev_feed_fd_event (EV_P_ int fd, int revents)
916{
917 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents);
919}
920
921/* make sure the external fd watch events are in-sync */
922/* with the kernel/libev internal state */
923inline_size void
924fd_reify (EV_P)
224{ 925{
225 int i; 926 int i;
226 927
227 for (i = 0; i < fdchangecnt; ++i) 928 for (i = 0; i < fdchangecnt; ++i)
228 { 929 {
229 int fd = fdchanges [i]; 930 int fd = fdchanges [i];
230 ANFD *anfd = anfds + fd; 931 ANFD *anfd = anfds + fd;
231 struct ev_io *w; 932 ev_io *w;
232 933
233 int events = 0; 934 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify;
234 936
235 for (w = anfd->head; w; w = w->next)
236 events |= w->events;
237
238 anfd->reify = 0; 937 anfd->reify = 0;
239 938
240 if (anfd->events != events) 939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
241 { 941 {
242 method_modify (fd, anfd->events, events); 942 unsigned long arg;
243 anfd->events = events; 943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
244 } 945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 {
950 anfd->events = 0;
951
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
953 anfd->events |= (unsigned char)w->events;
954
955 if (o_events != anfd->events)
956 o_reify = EV__IOFDSET; /* actually |= */
957 }
958
959 if (o_reify & EV__IOFDSET)
960 backend_modify (EV_A_ fd, o_events, anfd->events);
245 } 961 }
246 962
247 fdchangecnt = 0; 963 fdchangecnt = 0;
248} 964}
249 965
250static void 966/* something about the given fd changed */
251fd_change (int fd) 967inline_size void
968fd_change (EV_P_ int fd, int flags)
252{ 969{
253 if (anfds [fd].reify || fdchangecnt < 0) 970 unsigned char reify = anfds [fd].reify;
254 return;
255
256 anfds [fd].reify = 1; 971 anfds [fd].reify |= flags;
257 972
973 if (expect_true (!reify))
974 {
258 ++fdchangecnt; 975 ++fdchangecnt;
259 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
260 fdchanges [fdchangecnt - 1] = fd; 977 fdchanges [fdchangecnt - 1] = fd;
978 }
979}
980
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void
983fd_kill (EV_P_ int fd)
984{
985 ev_io *w;
986
987 while ((w = (ev_io *)anfds [fd].head))
988 {
989 ev_io_stop (EV_A_ w);
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 }
992}
993
994/* check whether the given fd is actually valid, for error recovery */
995inline_size int
996fd_valid (int fd)
997{
998#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else
1001 return fcntl (fd, F_GETFD) != -1;
1002#endif
261} 1003}
262 1004
263/* called on EBADF to verify fds */ 1005/* called on EBADF to verify fds */
264static void 1006static void noinline
265fd_recheck (void) 1007fd_ebadf (EV_P)
266{ 1008{
267 int fd; 1009 int fd;
268 1010
269 for (fd = 0; fd < anfdmax; ++fd) 1011 for (fd = 0; fd < anfdmax; ++fd)
270 if (anfds [fd].events) 1012 if (anfds [fd].events)
271 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1013 if (!fd_valid (fd) && errno == EBADF)
272 while (anfds [fd].head) 1014 fd_kill (EV_A_ fd);
1015}
1016
1017/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline
1019fd_enomem (EV_P)
1020{
1021 int fd;
1022
1023 for (fd = anfdmax; fd--; )
1024 if (anfds [fd].events)
1025 {
1026 fd_kill (EV_A_ fd);
1027 break;
1028 }
1029}
1030
1031/* usually called after fork if backend needs to re-arm all fds from scratch */
1032static void noinline
1033fd_rearm_all (EV_P)
1034{
1035 int fd;
1036
1037 for (fd = 0; fd < anfdmax; ++fd)
1038 if (anfds [fd].events)
1039 {
1040 anfds [fd].events = 0;
1041 anfds [fd].emask = 0;
1042 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1043 }
1044}
1045
1046/* used to prepare libev internal fd's */
1047/* this is not fork-safe */
1048inline_speed void
1049fd_intern (int fd)
1050{
1051#ifdef _WIN32
1052 unsigned long arg = 1;
1053 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1054#else
1055 fcntl (fd, F_SETFD, FD_CLOEXEC);
1056 fcntl (fd, F_SETFL, O_NONBLOCK);
1057#endif
1058}
1059
1060/*****************************************************************************/
1061
1062/*
1063 * the heap functions want a real array index. array index 0 is guaranteed to not
1064 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1065 * the branching factor of the d-tree.
1066 */
1067
1068/*
1069 * at the moment we allow libev the luxury of two heaps,
1070 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1071 * which is more cache-efficient.
1072 * the difference is about 5% with 50000+ watchers.
1073 */
1074#if EV_USE_4HEAP
1075
1076#define DHEAP 4
1077#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1078#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1079#define UPHEAP_DONE(p,k) ((p) == (k))
1080
1081/* away from the root */
1082inline_speed void
1083downheap (ANHE *heap, int N, int k)
1084{
1085 ANHE he = heap [k];
1086 ANHE *E = heap + N + HEAP0;
1087
1088 for (;;)
1089 {
1090 ev_tstamp minat;
1091 ANHE *minpos;
1092 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1093
1094 /* find minimum child */
1095 if (expect_true (pos + DHEAP - 1 < E))
1096 {
1097 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1098 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1099 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1100 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1101 }
1102 else if (pos < E)
1103 {
1104 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1105 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1106 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1107 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1108 }
1109 else
1110 break;
1111
1112 if (ANHE_at (he) <= minat)
1113 break;
1114
1115 heap [k] = *minpos;
1116 ev_active (ANHE_w (*minpos)) = k;
1117
1118 k = minpos - heap;
1119 }
1120
1121 heap [k] = he;
1122 ev_active (ANHE_w (he)) = k;
1123}
1124
1125#else /* 4HEAP */
1126
1127#define HEAP0 1
1128#define HPARENT(k) ((k) >> 1)
1129#define UPHEAP_DONE(p,k) (!(p))
1130
1131/* away from the root */
1132inline_speed void
1133downheap (ANHE *heap, int N, int k)
1134{
1135 ANHE he = heap [k];
1136
1137 for (;;)
1138 {
1139 int c = k << 1;
1140
1141 if (c >= N + HEAP0)
1142 break;
1143
1144 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1145 ? 1 : 0;
1146
1147 if (ANHE_at (he) <= ANHE_at (heap [c]))
1148 break;
1149
1150 heap [k] = heap [c];
1151 ev_active (ANHE_w (heap [k])) = k;
1152
1153 k = c;
1154 }
1155
1156 heap [k] = he;
1157 ev_active (ANHE_w (he)) = k;
1158}
1159#endif
1160
1161/* towards the root */
1162inline_speed void
1163upheap (ANHE *heap, int k)
1164{
1165 ANHE he = heap [k];
1166
1167 for (;;)
1168 {
1169 int p = HPARENT (k);
1170
1171 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1172 break;
1173
1174 heap [k] = heap [p];
1175 ev_active (ANHE_w (heap [k])) = k;
1176 k = p;
1177 }
1178
1179 heap [k] = he;
1180 ev_active (ANHE_w (he)) = k;
1181}
1182
1183/* move an element suitably so it is in a correct place */
1184inline_size void
1185adjustheap (ANHE *heap, int N, int k)
1186{
1187 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1188 upheap (heap, k);
1189 else
1190 downheap (heap, N, k);
1191}
1192
1193/* rebuild the heap: this function is used only once and executed rarely */
1194inline_size void
1195reheap (ANHE *heap, int N)
1196{
1197 int i;
1198
1199 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1200 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1201 for (i = 0; i < N; ++i)
1202 upheap (heap, i + HEAP0);
1203}
1204
1205/*****************************************************************************/
1206
1207/* associate signal watchers to a signal signal */
1208typedef struct
1209{
1210 EV_ATOMIC_T pending;
1211#if EV_MULTIPLICITY
1212 EV_P;
1213#endif
1214 WL head;
1215} ANSIG;
1216
1217static ANSIG signals [EV_NSIG - 1];
1218
1219/*****************************************************************************/
1220
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222
1223static void noinline
1224evpipe_init (EV_P)
1225{
1226 if (!ev_is_active (&pipe_w))
1227 {
1228# if EV_USE_EVENTFD
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0);
1232
1233 if (evfd >= 0)
1234 {
1235 evpipe [0] = -1;
1236 fd_intern (evfd); /* doing it twice doesn't hurt */
1237 ev_io_set (&pipe_w, evfd, EV_READ);
1238 }
1239 else
1240# endif
1241 {
1242 while (pipe (evpipe))
1243 ev_syserr ("(libev) error creating signal/async pipe");
1244
1245 fd_intern (evpipe [0]);
1246 fd_intern (evpipe [1]);
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1248 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279
1280 errno = old_errno;
1281 }
1282}
1283
1284/* called whenever the libev signal pipe */
1285/* got some events (signal, async) */
1286static void
1287pipecb (EV_P_ ev_io *iow, int revents)
1288{
1289 int i;
1290
1291#if EV_USE_EVENTFD
1292 if (evfd >= 0)
1293 {
1294 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t));
1296 }
1297 else
1298#endif
1299 {
1300 char dummy;
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1302 read (evpipe [0], &dummy, 1);
1303 }
1304
1305 if (sig_pending)
1306 {
1307 sig_pending = 0;
1308
1309 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1);
1312 }
1313
1314#if EV_ASYNC_ENABLE
1315 if (async_pending)
1316 {
1317 async_pending = 0;
1318
1319 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent)
273 { 1321 {
274 ev_io_stop (anfds [fd].head); 1322 asyncs [i]->sent = 0;
275 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
276 } 1324 }
1325 }
1326#endif
277} 1327}
278 1328
279/*****************************************************************************/ 1329/*****************************************************************************/
280 1330
281static struct ev_timer **timers;
282static int timermax, timercnt;
283
284static struct ev_periodic **periodics;
285static int periodicmax, periodiccnt;
286
287static void 1331static void
288upheap (WT *timers, int k) 1332ev_sighandler (int signum)
289{ 1333{
290 WT w = timers [k]; 1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
291 1337
292 while (k && timers [k >> 1]->at > w->at) 1338#ifdef _WIN32
293 { 1339 signal (signum, ev_sighandler);
294 timers [k] = timers [k >> 1]; 1340#endif
295 timers [k]->active = k + 1;
296 k >>= 1;
297 }
298 1341
299 timers [k] = w; 1342 signals [signum - 1].pending = 1;
300 timers [k]->active = k + 1; 1343 evpipe_write (EV_A_ &sig_pending);
301
302} 1344}
303 1345
1346void noinline
1347ev_feed_signal_event (EV_P_ int signum)
1348{
1349 WL w;
1350
1351 if (expect_false (signum <= 0 || signum > EV_NSIG))
1352 return;
1353
1354 --signum;
1355
1356#if EV_MULTIPLICITY
1357 /* it is permissible to try to feed a signal to the wrong loop */
1358 /* or, likely more useful, feeding a signal nobody is waiting for */
1359
1360 if (expect_false (signals [signum].loop != EV_A))
1361 return;
1362#endif
1363
1364 signals [signum].pending = 0;
1365
1366 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368}
1369
1370#if EV_USE_SIGNALFD
304static void 1371static void
305downheap (WT *timers, int N, int k) 1372sigfdcb (EV_P_ ev_io *iow, int revents)
306{ 1373{
307 WT w = timers [k]; 1374 struct signalfd_siginfo si[2], *sip; /* these structs are big */
308 1375
309 while (k < (N >> 1)) 1376 for (;;)
310 { 1377 {
311 int j = k << 1; 1378 ssize_t res = read (sigfd, si, sizeof (si));
312 1379
313 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1380 /* not ISO-C, as res might be -1, but works with SuS */
314 ++j; 1381 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1382 ev_feed_signal_event (EV_A_ sip->ssi_signo);
315 1383
316 if (w->at <= timers [j]->at) 1384 if (res < (ssize_t)sizeof (si))
317 break; 1385 break;
318
319 timers [k] = timers [j];
320 timers [k]->active = k + 1;
321 k = j;
322 } 1386 }
323
324 timers [k] = w;
325 timers [k]->active = k + 1;
326} 1387}
1388#endif
1389
1390#endif
327 1391
328/*****************************************************************************/ 1392/*****************************************************************************/
329 1393
330typedef struct 1394#if EV_CHILD_ENABLE
331{ 1395static WL childs [EV_PID_HASHSIZE];
332 struct ev_signal *head;
333 sig_atomic_t volatile gotsig;
334} ANSIG;
335 1396
336static ANSIG *signals;
337static int signalmax;
338
339static int sigpipe [2];
340static sig_atomic_t volatile gotsig;
341static struct ev_io sigev;
342
343static void
344signals_init (ANSIG *base, int count)
345{
346 while (count--)
347 {
348 base->head = 0;
349 base->gotsig = 0;
350
351 ++base;
352 }
353}
354
355static void
356sighandler (int signum)
357{
358 signals [signum - 1].gotsig = 1;
359
360 if (!gotsig)
361 {
362 gotsig = 1;
363 write (sigpipe [1], &signum, 1);
364 }
365}
366
367static void
368sigcb (struct ev_io *iow, int revents)
369{
370 struct ev_signal *w;
371 int signum;
372
373 read (sigpipe [0], &revents, 1);
374 gotsig = 0;
375
376 for (signum = signalmax; signum--; )
377 if (signals [signum].gotsig)
378 {
379 signals [signum].gotsig = 0;
380
381 for (w = signals [signum].head; w; w = w->next)
382 event ((W)w, EV_SIGNAL);
383 }
384}
385
386static void
387siginit (void)
388{
389 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391
392 /* rather than sort out wether we really need nb, set it */
393 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
395
396 ev_io_set (&sigev, sigpipe [0], EV_READ);
397 ev_io_start (&sigev);
398}
399
400/*****************************************************************************/
401
402static struct ev_idle **idles;
403static int idlemax, idlecnt;
404
405static struct ev_prepare **prepares;
406static int preparemax, preparecnt;
407
408static struct ev_check **checks;
409static int checkmax, checkcnt;
410
411/*****************************************************************************/
412
413static struct ev_child *childs [PID_HASHSIZE];
414static struct ev_signal childev; 1397static ev_signal childev;
1398
1399#ifndef WIFCONTINUED
1400# define WIFCONTINUED(status) 0
1401#endif
1402
1403/* handle a single child status event */
1404inline_speed void
1405child_reap (EV_P_ int chain, int pid, int status)
1406{
1407 ev_child *w;
1408 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1409
1410 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1411 {
1412 if ((w->pid == pid || !w->pid)
1413 && (!traced || (w->flags & 1)))
1414 {
1415 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1416 w->rpid = pid;
1417 w->rstatus = status;
1418 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1419 }
1420 }
1421}
415 1422
416#ifndef WCONTINUED 1423#ifndef WCONTINUED
417# define WCONTINUED 0 1424# define WCONTINUED 0
418#endif 1425#endif
419 1426
1427/* called on sigchld etc., calls waitpid */
420static void 1428static void
421childcb (struct ev_signal *sw, int revents) 1429childcb (EV_P_ ev_signal *sw, int revents)
422{ 1430{
423 struct ev_child *w;
424 int pid, status; 1431 int pid, status;
425 1432
1433 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
426 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1434 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1435 if (!WCONTINUED
428 if (w->pid == pid || w->pid == -1) 1436 || errno != EINVAL
429 { 1437 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
430 w->status = status; 1438 return;
431 event ((W)w, EV_CHILD); 1439
432 } 1440 /* make sure we are called again until all children have been reaped */
1441 /* we need to do it this way so that the callback gets called before we continue */
1442 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1443
1444 child_reap (EV_A_ pid, pid, status);
1445 if ((EV_PID_HASHSIZE) > 1)
1446 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
433} 1447}
1448
1449#endif
434 1450
435/*****************************************************************************/ 1451/*****************************************************************************/
436 1452
1453#if EV_USE_PORT
1454# include "ev_port.c"
1455#endif
1456#if EV_USE_KQUEUE
1457# include "ev_kqueue.c"
1458#endif
437#if EV_USE_EPOLL 1459#if EV_USE_EPOLL
438# include "ev_epoll.c" 1460# include "ev_epoll.c"
439#endif 1461#endif
1462#if EV_USE_POLL
1463# include "ev_poll.c"
1464#endif
440#if EV_USE_SELECT 1465#if EV_USE_SELECT
441# include "ev_select.c" 1466# include "ev_select.c"
442#endif 1467#endif
443 1468
444int 1469int
… …
451ev_version_minor (void) 1476ev_version_minor (void)
452{ 1477{
453 return EV_VERSION_MINOR; 1478 return EV_VERSION_MINOR;
454} 1479}
455 1480
456int ev_init (int flags) 1481/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size
1483enable_secure (void)
457{ 1484{
458 if (!ev_method) 1485#ifdef _WIN32
1486 return 0;
1487#else
1488 return getuid () != geteuid ()
1489 || getgid () != getegid ();
1490#endif
1491}
1492
1493unsigned int
1494ev_supported_backends (void)
1495{
1496 unsigned int flags = 0;
1497
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1503
1504 return flags;
1505}
1506
1507unsigned int
1508ev_recommended_backends (void)
1509{
1510 unsigned int flags = ev_supported_backends ();
1511
1512#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */
1514 /* it usually doesn't work correctly on anything but sockets and pipes */
1515 flags &= ~EVBACKEND_KQUEUE;
1516#endif
1517#ifdef __APPLE__
1518 /* only select works correctly on that "unix-certified" platform */
1519 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1520 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1521#endif
1522#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif
1525
1526 return flags;
1527}
1528
1529unsigned int
1530ev_embeddable_backends (void)
1531{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */
1536 flags &= ~EVBACKEND_EPOLL;
1537
1538 return flags;
1539}
1540
1541unsigned int
1542ev_backend (EV_P)
1543{
1544 return backend;
1545}
1546
1547#if EV_FEATURE_API
1548unsigned int
1549ev_iteration (EV_P)
1550{
1551 return loop_count;
1552}
1553
1554unsigned int
1555ev_depth (EV_P)
1556{
1557 return loop_depth;
1558}
1559
1560void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1562{
1563 io_blocktime = interval;
1564}
1565
1566void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1568{
1569 timeout_blocktime = interval;
1570}
1571
1572void
1573ev_set_userdata (EV_P_ void *data)
1574{
1575 userdata = data;
1576}
1577
1578void *
1579ev_userdata (EV_P)
1580{
1581 return userdata;
1582}
1583
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1585{
1586 invoke_cb = invoke_pending_cb;
1587}
1588
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1590{
1591 release_cb = release;
1592 acquire_cb = acquire;
1593}
1594#endif
1595
1596/* initialise a loop structure, must be zero-initialised */
1597static void noinline
1598loop_init (EV_P_ unsigned int flags)
1599{
1600 if (!backend)
459 { 1601 {
1602#if EV_USE_REALTIME
1603 if (!have_realtime)
1604 {
1605 struct timespec ts;
1606
1607 if (!clock_gettime (CLOCK_REALTIME, &ts))
1608 have_realtime = 1;
1609 }
1610#endif
1611
460#if EV_USE_MONOTONIC 1612#if EV_USE_MONOTONIC
1613 if (!have_monotonic)
1614 {
1615 struct timespec ts;
1616
1617 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1618 have_monotonic = 1;
1619 }
1620#endif
1621
1622 /* pid check not overridable via env */
1623#ifndef _WIN32
1624 if (flags & EVFLAG_FORKCHECK)
1625 curpid = getpid ();
1626#endif
1627
1628 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS"));
1632
1633 ev_rt_now = ev_time ();
1634 mn_now = get_clock ();
1635 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending;
1639#endif
1640
1641 io_blocktime = 0.;
1642 timeout_blocktime = 0.;
1643 backend = 0;
1644 backend_fd = -1;
1645 sig_pending = 0;
1646#if EV_ASYNC_ENABLE
1647 async_pending = 0;
1648#endif
1649#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif
1652#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif
1655
1656 if (!(flags & 0x0000ffffU))
1657 flags |= ev_recommended_backends ();
1658
1659#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif
1662#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1664#endif
1665#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif
1668#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif
1671#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1673#endif
1674
1675 ev_prepare_init (&pending_w, pendingcb);
1676
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1678 ev_init (&pipe_w, pipecb);
1679 ev_set_priority (&pipe_w, EV_MAXPRI);
1680#endif
1681 }
1682}
1683
1684/* free up a loop structure */
1685static void noinline
1686loop_destroy (EV_P)
1687{
1688 int i;
1689
1690 if (ev_is_active (&pipe_w))
1691 {
1692 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/
1694
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 }
1706
1707#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w))
1709 close (sigfd);
1710#endif
1711
1712#if EV_USE_INOTIFY
1713 if (fs_fd >= 0)
1714 close (fs_fd);
1715#endif
1716
1717 if (backend_fd >= 0)
1718 close (backend_fd);
1719
1720#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif
1723#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1725#endif
1726#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif
1729#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif
1732#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1734#endif
1735
1736 for (i = NUMPRI; i--; )
1737 {
1738 array_free (pending, [i]);
1739#if EV_IDLE_ENABLE
1740 array_free (idle, [i]);
1741#endif
1742 }
1743
1744 ev_free (anfds); anfds = 0; anfdmax = 0;
1745
1746 /* have to use the microsoft-never-gets-it-right macro */
1747 array_free (rfeed, EMPTY);
1748 array_free (fdchange, EMPTY);
1749 array_free (timer, EMPTY);
1750#if EV_PERIODIC_ENABLE
1751 array_free (periodic, EMPTY);
1752#endif
1753#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY);
1755#endif
1756 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY);
1760#endif
1761
1762 backend = 0;
1763}
1764
1765#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P);
1767#endif
1768
1769inline_size void
1770loop_fork (EV_P)
1771{
1772#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif
1775#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1777#endif
1778#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif
1781#if EV_USE_INOTIFY
1782 infy_fork (EV_A);
1783#endif
1784
1785 if (ev_is_active (&pipe_w))
1786 {
1787 /* this "locks" the handlers against writing to the pipe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793
1794 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w);
1796
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */
1811 pipecb (EV_A_ &pipe_w, EV_READ);
1812#endif
1813 }
1814
1815 postfork = 0;
1816}
1817
1818#if EV_MULTIPLICITY
1819
1820struct ev_loop *
1821ev_loop_new (unsigned int flags)
1822{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824
1825 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags);
1827
1828 if (ev_backend (EV_A))
1829 return EV_A;
1830
1831 return 0;
1832}
1833
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */
1847
1848#if EV_VERIFY
1849static void noinline
1850verify_watcher (EV_P_ W w)
1851{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853
1854 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856}
1857
1858static void noinline
1859verify_heap (EV_P_ ANHE *heap, int N)
1860{
1861 int i;
1862
1863 for (i = HEAP0; i < N + HEAP0; ++i)
1864 {
1865 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1866 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1867 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1868
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 }
1871}
1872
1873static void noinline
1874array_verify (EV_P_ W *ws, int cnt)
1875{
1876 while (cnt--)
1877 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1879 verify_watcher (EV_A_ ws [cnt]);
1880 }
1881}
1882#endif
1883
1884#if EV_FEATURE_API
1885void
1886ev_verify (EV_P)
1887{
1888#if EV_VERIFY
1889 int i;
1890 WL w;
1891
1892 assert (activecnt >= -1);
1893
1894 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897
1898 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i)
1900 for (w = anfds [i].head; w; w = w->next)
461 { 1901 {
462 struct timespec ts; 1902 verify_watcher (EV_A_ (W)w);
463 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
464 have_monotonic = 1; 1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
465 } 1905 }
1906
1907 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt);
1909
1910#if EV_PERIODIC_ENABLE
1911 assert (periodicmax >= periodiccnt);
1912 verify_heap (EV_A_ periodics, periodiccnt);
1913#endif
1914
1915 for (i = NUMPRI; i--; )
1916 {
1917 assert (pendingmax [i] >= pendingcnt [i]);
1918#if EV_IDLE_ENABLE
1919 assert (idleall >= 0);
1920 assert (idlemax [i] >= idlecnt [i]);
1921 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1922#endif
1923 }
1924
1925#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif
1929
1930#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif
1934
1935#if EV_PREPARE_ENABLE
1936 assert (preparemax >= preparecnt);
1937 array_verify (EV_A_ (W *)prepares, preparecnt);
1938#endif
1939
1940#if EV_CHECK_ENABLE
1941 assert (checkmax >= checkcnt);
1942 array_verify (EV_A_ (W *)checks, checkcnt);
1943#endif
1944
1945# if 0
1946#if EV_CHILD_ENABLE
1947 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1948 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1949#endif
466#endif 1950# endif
467
468 ev_now = ev_time ();
469 now = get_clock ();
470 diff = ev_now - now;
471
472 if (pipe (sigpipe))
473 return 0;
474
475 ev_method = EVMETHOD_NONE;
476#if EV_USE_EPOLL
477 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
478#endif 1951#endif
479#if EV_USE_SELECT 1952}
480 if (ev_method == EVMETHOD_NONE) select_init (flags);
481#endif 1953#endif
482 1954
483 if (ev_method) 1955#if EV_MULTIPLICITY
1956struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else
1959int
1960ev_default_loop (unsigned int flags)
1961#endif
1962{
1963 if (!ev_default_loop_ptr)
1964 {
1965#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct;
1967#else
1968 ev_default_loop_ptr = 1;
1969#endif
1970
1971 loop_init (EV_A_ flags);
1972
1973 if (ev_backend (EV_A))
484 { 1974 {
485 ev_watcher_init (&sigev, sigcb); 1975#if EV_CHILD_ENABLE
486 siginit ();
487
488 ev_signal_init (&childev, childcb, SIGCHLD); 1976 ev_signal_init (&childev, childcb, SIGCHLD);
1977 ev_set_priority (&childev, EV_MAXPRI);
489 ev_signal_start (&childev); 1978 ev_signal_start (EV_A_ &childev);
1979 ev_unref (EV_A); /* child watcher should not keep loop alive */
1980#endif
490 } 1981 }
1982 else
1983 ev_default_loop_ptr = 0;
491 } 1984 }
492 1985
493 return ev_method; 1986 return ev_default_loop_ptr;
1987}
1988
1989void
1990ev_default_destroy (void)
1991{
1992#if EV_MULTIPLICITY
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
494} 2014}
495 2015
496/*****************************************************************************/ 2016/*****************************************************************************/
497 2017
498void 2018void
499ev_fork_prepare (void) 2019ev_invoke (EV_P_ void *w, int revents)
500{ 2020{
501 /* nop */ 2021 EV_CB_INVOKE ((W)w, revents);
502} 2022}
503 2023
504void 2024unsigned int
505ev_fork_parent (void) 2025ev_pending_count (EV_P)
506{ 2026{
507 /* nop */ 2027 int pri;
508} 2028 unsigned int count = 0;
509 2029
510void 2030 for (pri = NUMPRI; pri--; )
511ev_fork_child (void) 2031 count += pendingcnt [pri];
2032
2033 return count;
2034}
2035
2036void noinline
2037ev_invoke_pending (EV_P)
512{ 2038{
513#if EV_USE_EPOLL 2039 int pri;
514 if (ev_method == EVMETHOD_EPOLL) 2040
515 epoll_postfork_child (); 2041 for (pri = NUMPRI; pri--; )
2042 while (pendingcnt [pri])
2043 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2045
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK;
2052 }
2053}
2054
2055#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */
2058inline_size void
2059idle_reify (EV_P)
2060{
2061 if (expect_false (idleall))
2062 {
2063 int pri;
2064
2065 for (pri = NUMPRI; pri--; )
2066 {
2067 if (pendingcnt [pri])
2068 break;
2069
2070 if (idlecnt [pri])
2071 {
2072 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2073 break;
2074 }
2075 }
2076 }
2077}
2078#endif
2079
2080/* make timers pending */
2081inline_size void
2082timers_reify (EV_P)
2083{
2084 EV_FREQUENT_CHECK;
2085
2086 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2087 {
2088 do
2089 {
2090 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2091
2092 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2093
2094 /* first reschedule or stop timer */
2095 if (w->repeat)
2096 {
2097 ev_at (w) += w->repeat;
2098 if (ev_at (w) < mn_now)
2099 ev_at (w) = mn_now;
2100
2101 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2102
2103 ANHE_at_cache (timers [HEAP0]);
2104 downheap (timers, timercnt, HEAP0);
2105 }
2106 else
2107 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2108
2109 EV_FREQUENT_CHECK;
2110 feed_reverse (EV_A_ (W)w);
2111 }
2112 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2113
2114 feed_reverse_done (EV_A_ EV_TIMER);
2115 }
2116}
2117
2118#if EV_PERIODIC_ENABLE
2119/* make periodics pending */
2120inline_size void
2121periodics_reify (EV_P)
2122{
2123 EV_FREQUENT_CHECK;
2124
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 {
2127 int feed_count = 0;
2128
2129 do
2130 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2134
2135 /* first reschedule or stop timer */
2136 if (w->reschedule_cb)
2137 {
2138 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2139
2140 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2141
2142 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0);
2144 }
2145 else if (w->interval)
2146 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0);
2163 }
2164 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2166
2167 EV_FREQUENT_CHECK;
2168 feed_reverse (EV_A_ (W)w);
2169 }
2170 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2171
2172 feed_reverse_done (EV_A_ EV_PERIODIC);
2173 }
2174}
2175
2176/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline
2179periodics_reschedule (EV_P)
2180{
2181 int i;
2182
2183 /* adjust periodics after time jump */
2184 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2185 {
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187
2188 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2192
2193 ANHE_at_cache (periodics [i]);
2194 }
2195
2196 reheap (periodics, periodiccnt);
2197}
2198#endif
2199
2200/* adjust all timers by a given offset */
2201static void noinline
2202timers_reschedule (EV_P_ ev_tstamp adjust)
2203{
2204 int i;
2205
2206 for (i = 0; i < timercnt; ++i)
2207 {
2208 ANHE *he = timers + i + HEAP0;
2209 ANHE_w (*he)->at += adjust;
2210 ANHE_at_cache (*he);
2211 }
2212}
2213
2214/* fetch new monotonic and realtime times from the kernel */
2215/* also detect if there was a timejump, and act accordingly */
2216inline_speed void
2217time_update (EV_P_ ev_tstamp max_block)
2218{
2219#if EV_USE_MONOTONIC
2220 if (expect_true (have_monotonic))
2221 {
2222 int i;
2223 ev_tstamp odiff = rtmn_diff;
2224
2225 mn_now = get_clock ();
2226
2227 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2228 /* interpolate in the meantime */
2229 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2230 {
2231 ev_rt_now = rtmn_diff + mn_now;
2232 return;
2233 }
2234
2235 now_floor = mn_now;
2236 ev_rt_now = ev_time ();
2237
2238 /* loop a few times, before making important decisions.
2239 * on the choice of "4": one iteration isn't enough,
2240 * in case we get preempted during the calls to
2241 * ev_time and get_clock. a second call is almost guaranteed
2242 * to succeed in that case, though. and looping a few more times
2243 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here.
2245 */
2246 for (i = 4; --i; )
2247 {
2248 rtmn_diff = ev_rt_now - mn_now;
2249
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2251 return; /* all is well */
2252
2253 ev_rt_now = ev_time ();
2254 mn_now = get_clock ();
2255 now_floor = mn_now;
2256 }
2257
2258 /* no timer adjustment, as the monotonic clock doesn't jump */
2259 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2260# if EV_PERIODIC_ENABLE
2261 periodics_reschedule (EV_A);
516#endif 2262# endif
2263 }
2264 else
2265#endif
2266 {
2267 ev_rt_now = ev_time ();
517 2268
518 ev_io_stop (&sigev); 2269 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
519 close (sigpipe [0]); 2270 {
520 close (sigpipe [1]); 2271 /* adjust timers. this is easy, as the offset is the same for all of them */
521 pipe (sigpipe); 2272 timers_reschedule (EV_A_ ev_rt_now - mn_now);
522 siginit (); 2273#if EV_PERIODIC_ENABLE
2274 periodics_reschedule (EV_A);
2275#endif
2276 }
2277
2278 mn_now = ev_rt_now;
2279 }
2280}
2281
2282void
2283ev_run (EV_P_ int flags)
2284{
2285#if EV_FEATURE_API
2286 ++loop_depth;
2287#endif
2288
2289 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2290
2291 loop_done = EVBREAK_CANCEL;
2292
2293 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2294
2295 do
2296 {
2297#if EV_VERIFY >= 2
2298 ev_verify (EV_A);
2299#endif
2300
2301#ifndef _WIN32
2302 if (expect_false (curpid)) /* penalise the forking check even more */
2303 if (expect_false (getpid () != curpid))
2304 {
2305 curpid = getpid ();
2306 postfork = 1;
2307 }
2308#endif
2309
2310#if EV_FORK_ENABLE
2311 /* we might have forked, so queue fork handlers */
2312 if (expect_false (postfork))
2313 if (forkcnt)
2314 {
2315 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2316 EV_INVOKE_PENDING;
2317 }
2318#endif
2319
2320#if EV_PREPARE_ENABLE
2321 /* queue prepare watchers (and execute them) */
2322 if (expect_false (preparecnt))
2323 {
2324 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2325 EV_INVOKE_PENDING;
2326 }
2327#endif
2328
2329 if (expect_false (loop_done))
2330 break;
2331
2332 /* we might have forked, so reify kernel state if necessary */
2333 if (expect_false (postfork))
2334 loop_fork (EV_A);
2335
2336 /* update fd-related kernel structures */
2337 fd_reify (EV_A);
2338
2339 /* calculate blocking time */
2340 {
2341 ev_tstamp waittime = 0.;
2342 ev_tstamp sleeptime = 0.;
2343
2344 /* remember old timestamp for io_blocktime calculation */
2345 ev_tstamp prev_mn_now = mn_now;
2346
2347 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100);
2349
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2351 {
2352 waittime = MAX_BLOCKTIME;
2353
2354 if (timercnt)
2355 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2357 if (waittime > to) waittime = to;
2358 }
2359
2360#if EV_PERIODIC_ENABLE
2361 if (periodiccnt)
2362 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2364 if (waittime > to) waittime = to;
2365 }
2366#endif
2367
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime;
2371
2372 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime))
2374 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376
2377 if (sleeptime > waittime - backend_fudge)
2378 sleeptime = waittime - backend_fudge;
2379
2380 if (expect_true (sleeptime > 0.))
2381 {
2382 ev_sleep (sleeptime);
2383 waittime -= sleeptime;
2384 }
2385 }
2386 }
2387
2388#if EV_FEATURE_API
2389 ++loop_count;
2390#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394
2395 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime);
2397 }
2398
2399 /* queue pending timers and reschedule them */
2400 timers_reify (EV_A); /* relative timers called last */
2401#if EV_PERIODIC_ENABLE
2402 periodics_reify (EV_A); /* absolute timers called first */
2403#endif
2404
2405#if EV_IDLE_ENABLE
2406 /* queue idle watchers unless other events are pending */
2407 idle_reify (EV_A);
2408#endif
2409
2410#if EV_CHECK_ENABLE
2411 /* queue check watchers, to be executed first */
2412 if (expect_false (checkcnt))
2413 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2414#endif
2415
2416 EV_INVOKE_PENDING;
2417 }
2418 while (expect_true (
2419 activecnt
2420 && !loop_done
2421 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2422 ));
2423
2424 if (loop_done == EVBREAK_ONE)
2425 loop_done = EVBREAK_CANCEL;
2426
2427#if EV_FEATURE_API
2428 --loop_depth;
2429#endif
2430}
2431
2432void
2433ev_break (EV_P_ int how)
2434{
2435 loop_done = how;
2436}
2437
2438void
2439ev_ref (EV_P)
2440{
2441 ++activecnt;
2442}
2443
2444void
2445ev_unref (EV_P)
2446{
2447 --activecnt;
2448}
2449
2450void
2451ev_now_update (EV_P)
2452{
2453 time_update (EV_A_ 1e100);
2454}
2455
2456void
2457ev_suspend (EV_P)
2458{
2459 ev_now_update (EV_A);
2460}
2461
2462void
2463ev_resume (EV_P)
2464{
2465 ev_tstamp mn_prev = mn_now;
2466
2467 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev);
2469#if EV_PERIODIC_ENABLE
2470 /* TODO: really do this? */
2471 periodics_reschedule (EV_A);
2472#endif
523} 2473}
524 2474
525/*****************************************************************************/ 2475/*****************************************************************************/
2476/* singly-linked list management, used when the expected list length is short */
526 2477
527static void 2478inline_size void
528call_pending (void) 2479wlist_add (WL *head, WL elem)
529{ 2480{
530 while (pendingcnt) 2481 elem->next = *head;
531 { 2482 *head = elem;
532 ANPENDING *p = pendings + --pendingcnt; 2483}
533 2484
534 if (p->w) 2485inline_size void
2486wlist_del (WL *head, WL elem)
2487{
2488 while (*head)
2489 {
2490 if (expect_true (*head == elem))
535 { 2491 {
536 p->w->pending = 0; 2492 *head = elem->next;
537 p->w->cb (p->w, p->events); 2493 break;
538 } 2494 }
2495
2496 head = &(*head)->next;
2497 }
2498}
2499
2500/* internal, faster, version of ev_clear_pending */
2501inline_speed void
2502clear_pending (EV_P_ W w)
2503{
2504 if (w->pending)
539 } 2505 {
2506 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2507 w->pending = 0;
2508 }
540} 2509}
541 2510
542static void 2511int
543timers_reify (void) 2512ev_clear_pending (EV_P_ void *w)
544{ 2513{
545 while (timercnt && timers [0]->at <= now) 2514 W w_ = (W)w;
2515 int pending = w_->pending;
2516
2517 if (expect_true (pending))
2518 {
2519 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2520 p->w = (W)&pending_w;
2521 w_->pending = 0;
2522 return p->events;
2523 }
2524 else
2525 return 0;
2526}
2527
2528inline_size void
2529pri_adjust (EV_P_ W w)
2530{
2531 int pri = ev_priority (w);
2532 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2533 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2534 ev_set_priority (w, pri);
2535}
2536
2537inline_speed void
2538ev_start (EV_P_ W w, int active)
2539{
2540 pri_adjust (EV_A_ w);
2541 w->active = active;
2542 ev_ref (EV_A);
2543}
2544
2545inline_size void
2546ev_stop (EV_P_ W w)
2547{
2548 ev_unref (EV_A);
2549 w->active = 0;
2550}
2551
2552/*****************************************************************************/
2553
2554void noinline
2555ev_io_start (EV_P_ ev_io *w)
2556{
2557 int fd = w->fd;
2558
2559 if (expect_false (ev_is_active (w)))
2560 return;
2561
2562 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564
2565 EV_FREQUENT_CHECK;
2566
2567 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2569 wlist_add (&anfds[fd].head, (WL)w);
2570
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET;
2573
2574 EV_FREQUENT_CHECK;
2575}
2576
2577void noinline
2578ev_io_stop (EV_P_ ev_io *w)
2579{
2580 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w)))
2582 return;
2583
2584 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2585
2586 EV_FREQUENT_CHECK;
2587
2588 wlist_del (&anfds[w->fd].head, (WL)w);
2589 ev_stop (EV_A_ (W)w);
2590
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592
2593 EV_FREQUENT_CHECK;
2594}
2595
2596void noinline
2597ev_timer_start (EV_P_ ev_timer *w)
2598{
2599 if (expect_false (ev_is_active (w)))
2600 return;
2601
2602 ev_at (w) += mn_now;
2603
2604 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2605
2606 EV_FREQUENT_CHECK;
2607
2608 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w));
2614
2615 EV_FREQUENT_CHECK;
2616
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618}
2619
2620void noinline
2621ev_timer_stop (EV_P_ ev_timer *w)
2622{
2623 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w)))
2625 return;
2626
2627 EV_FREQUENT_CHECK;
2628
2629 {
2630 int active = ev_active (w);
2631
2632 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2633
2634 --timercnt;
2635
2636 if (expect_true (active < timercnt + HEAP0))
546 { 2637 {
547 struct ev_timer *w = timers [0]; 2638 timers [active] = timers [timercnt + HEAP0];
2639 adjustheap (timers, timercnt, active);
2640 }
2641 }
548 2642
549 /* first reschedule or stop timer */ 2643 ev_at (w) -= mn_now;
2644
2645 ev_stop (EV_A_ (W)w);
2646
2647 EV_FREQUENT_CHECK;
2648}
2649
2650void noinline
2651ev_timer_again (EV_P_ ev_timer *w)
2652{
2653 EV_FREQUENT_CHECK;
2654
2655 if (ev_is_active (w))
2656 {
550 if (w->repeat) 2657 if (w->repeat)
551 { 2658 {
552 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553 w->at = now + w->repeat; 2659 ev_at (w) = mn_now + w->repeat;
554 downheap ((WT *)timers, timercnt, 0); 2660 ANHE_at_cache (timers [ev_active (w)]);
2661 adjustheap (timers, timercnt, ev_active (w));
555 } 2662 }
556 else 2663 else
557 ev_timer_stop (w); /* nonrepeating: stop timer */ 2664 ev_timer_stop (EV_A_ w);
558
559 event ((W)w, EV_TIMEOUT);
560 }
561}
562
563static void
564periodics_reify (void)
565{
566 while (periodiccnt && periodics [0]->at <= ev_now)
567 { 2665 }
568 struct ev_periodic *w = periodics [0]; 2666 else if (w->repeat)
2667 {
2668 ev_at (w) = w->repeat;
2669 ev_timer_start (EV_A_ w);
2670 }
569 2671
570 /* first reschedule or stop timer */ 2672 EV_FREQUENT_CHECK;
2673}
2674
2675ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w)
2677{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679}
2680
2681#if EV_PERIODIC_ENABLE
2682void noinline
2683ev_periodic_start (EV_P_ ev_periodic *w)
2684{
2685 if (expect_false (ev_is_active (w)))
2686 return;
2687
2688 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
571 if (w->interval) 2690 else if (w->interval)
2691 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 }
2696 else
2697 ev_at (w) = w->offset;
2698
2699 EV_FREQUENT_CHECK;
2700
2701 ++periodiccnt;
2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2704 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2705 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w));
2707
2708 EV_FREQUENT_CHECK;
2709
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711}
2712
2713void noinline
2714ev_periodic_stop (EV_P_ ev_periodic *w)
2715{
2716 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w)))
2718 return;
2719
2720 EV_FREQUENT_CHECK;
2721
2722 {
2723 int active = ev_active (w);
2724
2725 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2726
2727 --periodiccnt;
2728
2729 if (expect_true (active < periodiccnt + HEAP0))
2730 {
2731 periodics [active] = periodics [periodiccnt + HEAP0];
2732 adjustheap (periodics, periodiccnt, active);
2733 }
2734 }
2735
2736 ev_stop (EV_A_ (W)w);
2737
2738 EV_FREQUENT_CHECK;
2739}
2740
2741void noinline
2742ev_periodic_again (EV_P_ ev_periodic *w)
2743{
2744 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w);
2747}
2748#endif
2749
2750#ifndef SA_RESTART
2751# define SA_RESTART 0
2752#endif
2753
2754#if EV_SIGNAL_ENABLE
2755
2756void noinline
2757ev_signal_start (EV_P_ ev_signal *w)
2758{
2759 if (expect_false (ev_is_active (w)))
2760 return;
2761
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2763
2764#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767
2768 signals [w->signum - 1].loop = EV_A;
2769#endif
2770
2771 EV_FREQUENT_CHECK;
2772
2773#if EV_USE_SIGNALFD
2774 if (sigfd == -2)
2775 {
2776 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2777 if (sigfd < 0 && errno == EINVAL)
2778 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2779
2780 if (sigfd >= 0)
572 { 2781 {
573 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2782 fd_intern (sigfd); /* doing it twice will not hurt */
574 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2783
575 downheap ((WT *)periodics, periodiccnt, 0); 2784 sigemptyset (&sigfd_set);
2785
2786 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2787 ev_set_priority (&sigfd_w, EV_MAXPRI);
2788 ev_io_start (EV_A_ &sigfd_w);
2789 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2790 }
2791 }
2792
2793 if (sigfd >= 0)
2794 {
2795 /* TODO: check .head */
2796 sigaddset (&sigfd_set, w->signum);
2797 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2798
2799 signalfd (sigfd, &sigfd_set, 0);
2800 }
2801#endif
2802
2803 ev_start (EV_A_ (W)w, 1);
2804 wlist_add (&signals [w->signum - 1].head, (WL)w);
2805
2806 if (!((WL)w)->next)
2807# if EV_USE_SIGNALFD
2808 if (sigfd < 0) /*TODO*/
2809# endif
2810 {
2811# ifdef _WIN32
2812 evpipe_init (EV_A);
2813
2814 signal (w->signum, ev_sighandler);
2815# else
2816 struct sigaction sa;
2817
2818 evpipe_init (EV_A);
2819
2820 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0);
2824
2825 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2828#endif
2829 }
2830
2831 EV_FREQUENT_CHECK;
2832}
2833
2834void noinline
2835ev_signal_stop (EV_P_ ev_signal *w)
2836{
2837 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w)))
2839 return;
2840
2841 EV_FREQUENT_CHECK;
2842
2843 wlist_del (&signals [w->signum - 1].head, (WL)w);
2844 ev_stop (EV_A_ (W)w);
2845
2846 if (!signals [w->signum - 1].head)
2847 {
2848#if EV_MULTIPLICITY
2849 signals [w->signum - 1].loop = 0; /* unattach from signal */
2850#endif
2851#if EV_USE_SIGNALFD
2852 if (sigfd >= 0)
2853 {
2854 sigset_t ss;
2855
2856 sigemptyset (&ss);
2857 sigaddset (&ss, w->signum);
2858 sigdelset (&sigfd_set, w->signum);
2859
2860 signalfd (sigfd, &sigfd_set, 0);
2861 sigprocmask (SIG_UNBLOCK, &ss, 0);
576 } 2862 }
577 else 2863 else
578 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2864#endif
579 2865 signal (w->signum, SIG_DFL);
580 event ((W)w, EV_PERIODIC);
581 }
582}
583
584static void
585periodics_reschedule (ev_tstamp diff)
586{
587 int i;
588
589 /* adjust periodics after time jump */
590 for (i = 0; i < periodiccnt; ++i)
591 { 2866 }
592 struct ev_periodic *w = periodics [i];
593 2867
594 if (w->interval) 2868 EV_FREQUENT_CHECK;
2869}
2870
2871#endif
2872
2873#if EV_CHILD_ENABLE
2874
2875void
2876ev_child_start (EV_P_ ev_child *w)
2877{
2878#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif
2881 if (expect_false (ev_is_active (w)))
2882 return;
2883
2884 EV_FREQUENT_CHECK;
2885
2886 ev_start (EV_A_ (W)w, 1);
2887 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2888
2889 EV_FREQUENT_CHECK;
2890}
2891
2892void
2893ev_child_stop (EV_P_ ev_child *w)
2894{
2895 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w)))
2897 return;
2898
2899 EV_FREQUENT_CHECK;
2900
2901 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2902 ev_stop (EV_A_ (W)w);
2903
2904 EV_FREQUENT_CHECK;
2905}
2906
2907#endif
2908
2909#if EV_STAT_ENABLE
2910
2911# ifdef _WIN32
2912# undef lstat
2913# define lstat(a,b) _stati64 (a,b)
2914# endif
2915
2916#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891
2919
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921
2922#if EV_USE_INOTIFY
2923
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926
2927static void noinline
2928infy_add (EV_P_ ev_stat *w)
2929{
2930 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);
2931
2932 if (w->wd >= 0)
2933 {
2934 struct statfs sfs;
2935
2936 /* now local changes will be tracked by inotify, but remote changes won't */
2937 /* unless the filesystem is known to be local, we therefore still poll */
2938 /* also do poll on <2.6.25, but with normal frequency */
2939
2940 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */
2945 || sfs.f_type == 0x3153464a /* jfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */
2948 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 }
2953 else
2954 {
2955 /* can't use inotify, continue to stat */
2956 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2957
2958 /* if path is not there, monitor some parent directory for speedup hints */
2959 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2960 /* but an efficiency issue only */
2961 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
595 { 2962 {
596 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 2963 char path [4096];
2964 strcpy (path, w->path);
597 2965
598 if (fabs (diff) >= 1e-4) 2966 do
599 { 2967 {
600 ev_periodic_stop (w); 2968 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
601 ev_periodic_start (w); 2969 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
602 2970
603 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 2971 char *pend = strrchr (path, '/');
2972
2973 if (!pend || pend == path)
2974 break;
2975
2976 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 }
2981 }
2982
2983 if (w->wd >= 0)
2984 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2985
2986 /* now re-arm timer, if required */
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990}
2991
2992static void noinline
2993infy_del (EV_P_ ev_stat *w)
2994{
2995 int slot;
2996 int wd = w->wd;
2997
2998 if (wd < 0)
2999 return;
3000
3001 w->wd = -2;
3002 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3003 wlist_del (&fs_hash [slot].head, (WL)w);
3004
3005 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd);
3007}
3008
3009static void noinline
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{
3012 if (slot < 0)
3013 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3015 infy_wd (EV_A_ slot, wd, ev);
3016 else
3017 {
3018 WL w_;
3019
3020 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3021 {
3022 ev_stat *w = (ev_stat *)w_;
3023 w_ = w_->next; /* lets us remove this watcher and all before it */
3024
3025 if (w->wd == wd || wd == -1)
3026 {
3027 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3028 {
3029 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3030 w->wd = -1;
3031 infy_add (EV_A_ w); /* re-add, no matter what */
3032 }
3033
3034 stat_timer_cb (EV_A_ &w->timer, 0);
604 } 3035 }
605 } 3036 }
606 } 3037 }
607} 3038}
608 3039
609static void 3040static void
610time_update (void) 3041infy_cb (EV_P_ ev_io *w, int revents)
611{ 3042{
3043 char buf [EV_INOTIFY_BUFSIZE];
3044 int ofs;
3045 int len = read (fs_fd, buf, sizeof (buf));
3046
3047 for (ofs = 0; ofs < len; )
3048 {
3049 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len;
3052 }
3053}
3054
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
612 int i; 3060 int i;
3061 char *p = buf.release;
613 3062
614 ev_now = ev_time (); 3063 if (uname (&buf))
3064 return 0;
615 3065
616 if (have_monotonic) 3066 for (i = 3+1; --i; )
617 { 3067 {
618 ev_tstamp odiff = diff; 3068 unsigned int c = 0;
619 3069
620 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3070 for (;;)
621 { 3071 {
622 now = get_clock (); 3072 if (*p >= '0' && *p <= '9')
623 diff = ev_now - now; 3073 c = c * 10 + *p++ - '0';
624 3074 else
625 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3075 {
626 return; /* all is well */ 3076 p += *p == '.';
627 3077 break;
628 ev_now = ev_time (); 3078 }
629 } 3079 }
630 3080
631 periodics_reschedule (diff - odiff); 3081 v = (v << 8) | c;
632 /* no timer adjustment, as the monotonic clock doesn't jump */ 3082 }
3083
3084 return v;
3085}
3086
3087inline_size void
3088ev_check_2625 (EV_P)
3089{
3090 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */
3093 if (ev_linux_version () < 0x020619)
3094 return;
3095
3096 fs_2625 = 1;
3097}
3098
3099inline_size int
3100infy_newfd (void)
3101{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0)
3105 return fd;
3106#endif
3107 return inotify_init ();
3108}
3109
3110inline_size void
3111infy_init (EV_P)
3112{
3113 if (fs_fd != -2)
3114 return;
3115
3116 fs_fd = -1;
3117
3118 ev_check_2625 (EV_A);
3119
3120 fs_fd = infy_newfd ();
3121
3122 if (fs_fd >= 0)
633 } 3123 {
3124 fd_intern (fs_fd);
3125 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3126 ev_set_priority (&fs_w, EV_MAXPRI);
3127 ev_io_start (EV_A_ &fs_w);
3128 ev_unref (EV_A);
3129 }
3130}
3131
3132inline_size void
3133infy_fork (EV_P)
3134{
3135 int slot;
3136
3137 if (fs_fd < 0)
3138 return;
3139
3140 ev_ref (EV_A);
3141 ev_io_stop (EV_A_ &fs_w);
3142 close (fs_fd);
3143 fs_fd = infy_newfd ();
3144
3145 if (fs_fd >= 0)
3146 {
3147 fd_intern (fs_fd);
3148 ev_io_set (&fs_w, fs_fd, EV_READ);
3149 ev_io_start (EV_A_ &fs_w);
3150 ev_unref (EV_A);
3151 }
3152
3153 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3154 {
3155 WL w_ = fs_hash [slot].head;
3156 fs_hash [slot].head = 0;
3157
3158 while (w_)
3159 {
3160 ev_stat *w = (ev_stat *)w_;
3161 w_ = w_->next; /* lets us add this watcher */
3162
3163 w->wd = -1;
3164
3165 if (fs_fd >= 0)
3166 infy_add (EV_A_ w); /* re-add, no matter what */
3167 else
3168 {
3169 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3170 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3171 ev_timer_again (EV_A_ &w->timer);
3172 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3173 }
3174 }
3175 }
3176}
3177
3178#endif
3179
3180#ifdef _WIN32
3181# define EV_LSTAT(p,b) _stati64 (p, b)
3182#else
3183# define EV_LSTAT(p,b) lstat (p, b)
3184#endif
3185
3186void
3187ev_stat_stat (EV_P_ ev_stat *w)
3188{
3189 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1;
3193}
3194
3195static void noinline
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199
3200 ev_statdata prev = w->attr;
3201 ev_stat_stat (EV_A_ w);
3202
3203 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3204 if (
3205 prev.st_dev != w->attr.st_dev
3206 || prev.st_ino != w->attr.st_ino
3207 || prev.st_mode != w->attr.st_mode
3208 || prev.st_nlink != w->attr.st_nlink
3209 || prev.st_uid != w->attr.st_uid
3210 || prev.st_gid != w->attr.st_gid
3211 || prev.st_rdev != w->attr.st_rdev
3212 || prev.st_size != w->attr.st_size
3213 || prev.st_atime != w->attr.st_atime
3214 || prev.st_mtime != w->attr.st_mtime
3215 || prev.st_ctime != w->attr.st_ctime
3216 ) {
3217 /* we only update w->prev on actual differences */
3218 /* in case we test more often than invoke the callback, */
3219 /* to ensure that prev is always different to attr */
3220 w->prev = prev;
3221
3222 #if EV_USE_INOTIFY
3223 if (fs_fd >= 0)
3224 {
3225 infy_del (EV_A_ w);
3226 infy_add (EV_A_ w);
3227 ev_stat_stat (EV_A_ w); /* avoid race... */
3228 }
3229 #endif
3230
3231 ev_feed_event (EV_A_ w, EV_STAT);
3232 }
3233}
3234
3235void
3236ev_stat_start (EV_P_ ev_stat *w)
3237{
3238 if (expect_false (ev_is_active (w)))
3239 return;
3240
3241 ev_stat_stat (EV_A_ w);
3242
3243 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3244 w->interval = MIN_STAT_INTERVAL;
3245
3246 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3247 ev_set_priority (&w->timer, ev_priority (w));
3248
3249#if EV_USE_INOTIFY
3250 infy_init (EV_A);
3251
3252 if (fs_fd >= 0)
3253 infy_add (EV_A_ w);
634 else 3254 else
3255#endif
3256 {
3257 ev_timer_again (EV_A_ &w->timer);
3258 ev_unref (EV_A);
635 { 3259 }
636 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3260
3261 ev_start (EV_A_ (W)w, 1);
3262
3263 EV_FREQUENT_CHECK;
3264}
3265
3266void
3267ev_stat_stop (EV_P_ ev_stat *w)
3268{
3269 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w)))
3271 return;
3272
3273 EV_FREQUENT_CHECK;
3274
3275#if EV_USE_INOTIFY
3276 infy_del (EV_A_ w);
3277#endif
3278
3279 if (ev_is_active (&w->timer))
3280 {
3281 ev_ref (EV_A);
3282 ev_timer_stop (EV_A_ &w->timer);
3283 }
3284
3285 ev_stop (EV_A_ (W)w);
3286
3287 EV_FREQUENT_CHECK;
3288}
3289#endif
3290
3291#if EV_IDLE_ENABLE
3292void
3293ev_idle_start (EV_P_ ev_idle *w)
3294{
3295 if (expect_false (ev_is_active (w)))
3296 return;
3297
3298 pri_adjust (EV_A_ (W)w);
3299
3300 EV_FREQUENT_CHECK;
3301
3302 {
3303 int active = ++idlecnt [ABSPRI (w)];
3304
3305 ++idleall;
3306 ev_start (EV_A_ (W)w, active);
3307
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3309 idles [ABSPRI (w)][active - 1] = w;
3310 }
3311
3312 EV_FREQUENT_CHECK;
3313}
3314
3315void
3316ev_idle_stop (EV_P_ ev_idle *w)
3317{
3318 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w)))
3320 return;
3321
3322 EV_FREQUENT_CHECK;
3323
3324 {
3325 int active = ev_active (w);
3326
3327 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3328 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3329
3330 ev_stop (EV_A_ (W)w);
3331 --idleall;
3332 }
3333
3334 EV_FREQUENT_CHECK;
3335}
3336#endif
3337
3338#if EV_PREPARE_ENABLE
3339void
3340ev_prepare_start (EV_P_ ev_prepare *w)
3341{
3342 if (expect_false (ev_is_active (w)))
3343 return;
3344
3345 EV_FREQUENT_CHECK;
3346
3347 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3349 prepares [preparecnt - 1] = w;
3350
3351 EV_FREQUENT_CHECK;
3352}
3353
3354void
3355ev_prepare_stop (EV_P_ ev_prepare *w)
3356{
3357 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w)))
3359 return;
3360
3361 EV_FREQUENT_CHECK;
3362
3363 {
3364 int active = ev_active (w);
3365
3366 prepares [active - 1] = prepares [--preparecnt];
3367 ev_active (prepares [active - 1]) = active;
3368 }
3369
3370 ev_stop (EV_A_ (W)w);
3371
3372 EV_FREQUENT_CHECK;
3373}
3374#endif
3375
3376#if EV_CHECK_ENABLE
3377void
3378ev_check_start (EV_P_ ev_check *w)
3379{
3380 if (expect_false (ev_is_active (w)))
3381 return;
3382
3383 EV_FREQUENT_CHECK;
3384
3385 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3387 checks [checkcnt - 1] = w;
3388
3389 EV_FREQUENT_CHECK;
3390}
3391
3392void
3393ev_check_stop (EV_P_ ev_check *w)
3394{
3395 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w)))
3397 return;
3398
3399 EV_FREQUENT_CHECK;
3400
3401 {
3402 int active = ev_active (w);
3403
3404 checks [active - 1] = checks [--checkcnt];
3405 ev_active (checks [active - 1]) = active;
3406 }
3407
3408 ev_stop (EV_A_ (W)w);
3409
3410 EV_FREQUENT_CHECK;
3411}
3412#endif
3413
3414#if EV_EMBED_ENABLE
3415void noinline
3416ev_embed_sweep (EV_P_ ev_embed *w)
3417{
3418 ev_run (w->other, EVRUN_NOWAIT);
3419}
3420
3421static void
3422embed_io_cb (EV_P_ ev_io *io, int revents)
3423{
3424 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3425
3426 if (ev_cb (w))
3427 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3428 else
3429 ev_run (w->other, EVRUN_NOWAIT);
3430}
3431
3432static void
3433embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3434{
3435 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3436
3437 {
3438 EV_P = w->other;
3439
3440 while (fdchangecnt)
637 { 3441 {
638 periodics_reschedule (ev_now - now); 3442 fd_reify (EV_A);
639 3443 ev_run (EV_A_ EVRUN_NOWAIT);
640 /* adjust timers. this is easy, as the offset is the same for all */
641 for (i = 0; i < timercnt; ++i)
642 timers [i]->at += diff;
643 } 3444 }
644
645 now = ev_now;
646 } 3445 }
647} 3446}
648 3447
649int ev_loop_done; 3448static void
650 3449embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
651void ev_loop (int flags)
652{ 3450{
653 double block; 3451 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
654 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
655 3452
656 do 3453 ev_embed_stop (EV_A_ w);
3454
657 { 3455 {
658 /* queue check watchers (and execute them) */ 3456 EV_P = w->other;
659 if (preparecnt)
660 {
661 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
662 call_pending ();
663 }
664 3457
665 /* update fd-related kernel structures */ 3458 ev_loop_fork (EV_A);
666 fd_reify (); 3459 ev_run (EV_A_ EVRUN_NOWAIT);
667
668 /* calculate blocking time */
669
670 /* we only need this for !monotonic clockor timers, but as we basically
671 always have timers, we just calculate it always */
672 ev_now = ev_time ();
673
674 if (flags & EVLOOP_NONBLOCK || idlecnt)
675 block = 0.;
676 else
677 {
678 block = MAX_BLOCKTIME;
679
680 if (timercnt)
681 {
682 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
683 if (block > to) block = to;
684 }
685
686 if (periodiccnt)
687 {
688 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
689 if (block > to) block = to;
690 }
691
692 if (block < 0.) block = 0.;
693 }
694
695 method_poll (block);
696
697 /* update ev_now, do magic */
698 time_update ();
699
700 /* queue pending timers and reschedule them */
701 timers_reify (); /* relative timers called last */
702 periodics_reify (); /* absolute timers called first */
703
704 /* queue idle watchers unless io or timers are pending */
705 if (!pendingcnt)
706 queue_events ((W *)idles, idlecnt, EV_IDLE);
707
708 /* queue check watchers, to be executed first */
709 if (checkcnt)
710 queue_events ((W *)checks, checkcnt, EV_CHECK);
711
712 call_pending ();
713 } 3460 }
714 while (!ev_loop_done);
715 3461
716 if (ev_loop_done != 2) 3462 ev_embed_start (EV_A_ w);
717 ev_loop_done = 0;
718} 3463}
3464
3465#if 0
3466static void
3467embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3468{
3469 ev_idle_stop (EV_A_ idle);
3470}
3471#endif
3472
3473void
3474ev_embed_start (EV_P_ ev_embed *w)
3475{
3476 if (expect_false (ev_is_active (w)))
3477 return;
3478
3479 {
3480 EV_P = w->other;
3481 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3482 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3483 }
3484
3485 EV_FREQUENT_CHECK;
3486
3487 ev_set_priority (&w->io, ev_priority (w));
3488 ev_io_start (EV_A_ &w->io);
3489
3490 ev_prepare_init (&w->prepare, embed_prepare_cb);
3491 ev_set_priority (&w->prepare, EV_MINPRI);
3492 ev_prepare_start (EV_A_ &w->prepare);
3493
3494 ev_fork_init (&w->fork, embed_fork_cb);
3495 ev_fork_start (EV_A_ &w->fork);
3496
3497 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3498
3499 ev_start (EV_A_ (W)w, 1);
3500
3501 EV_FREQUENT_CHECK;
3502}
3503
3504void
3505ev_embed_stop (EV_P_ ev_embed *w)
3506{
3507 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w)))
3509 return;
3510
3511 EV_FREQUENT_CHECK;
3512
3513 ev_io_stop (EV_A_ &w->io);
3514 ev_prepare_stop (EV_A_ &w->prepare);
3515 ev_fork_stop (EV_A_ &w->fork);
3516
3517 ev_stop (EV_A_ (W)w);
3518
3519 EV_FREQUENT_CHECK;
3520}
3521#endif
3522
3523#if EV_FORK_ENABLE
3524void
3525ev_fork_start (EV_P_ ev_fork *w)
3526{
3527 if (expect_false (ev_is_active (w)))
3528 return;
3529
3530 EV_FREQUENT_CHECK;
3531
3532 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3534 forks [forkcnt - 1] = w;
3535
3536 EV_FREQUENT_CHECK;
3537}
3538
3539void
3540ev_fork_stop (EV_P_ ev_fork *w)
3541{
3542 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w)))
3544 return;
3545
3546 EV_FREQUENT_CHECK;
3547
3548 {
3549 int active = ev_active (w);
3550
3551 forks [active - 1] = forks [--forkcnt];
3552 ev_active (forks [active - 1]) = active;
3553 }
3554
3555 ev_stop (EV_A_ (W)w);
3556
3557 EV_FREQUENT_CHECK;
3558}
3559#endif
3560
3561#if EV_ASYNC_ENABLE
3562void
3563ev_async_start (EV_P_ ev_async *w)
3564{
3565 if (expect_false (ev_is_active (w)))
3566 return;
3567
3568 w->sent = 0;
3569
3570 evpipe_init (EV_A);
3571
3572 EV_FREQUENT_CHECK;
3573
3574 ev_start (EV_A_ (W)w, ++asynccnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3576 asyncs [asynccnt - 1] = w;
3577
3578 EV_FREQUENT_CHECK;
3579}
3580
3581void
3582ev_async_stop (EV_P_ ev_async *w)
3583{
3584 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w)))
3586 return;
3587
3588 EV_FREQUENT_CHECK;
3589
3590 {
3591 int active = ev_active (w);
3592
3593 asyncs [active - 1] = asyncs [--asynccnt];
3594 ev_active (asyncs [active - 1]) = active;
3595 }
3596
3597 ev_stop (EV_A_ (W)w);
3598
3599 EV_FREQUENT_CHECK;
3600}
3601
3602void
3603ev_async_send (EV_P_ ev_async *w)
3604{
3605 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending);
3607}
3608#endif
719 3609
720/*****************************************************************************/ 3610/*****************************************************************************/
721 3611
722static void
723wlist_add (WL *head, WL elem)
724{
725 elem->next = *head;
726 *head = elem;
727}
728
729static void
730wlist_del (WL *head, WL elem)
731{
732 while (*head)
733 {
734 if (*head == elem)
735 {
736 *head = elem->next;
737 return;
738 }
739
740 head = &(*head)->next;
741 }
742}
743
744static void
745ev_clear_pending (W w)
746{
747 if (w->pending)
748 {
749 pendings [w->pending - 1].w = 0;
750 w->pending = 0;
751 }
752}
753
754static void
755ev_start (W w, int active)
756{
757 w->active = active;
758}
759
760static void
761ev_stop (W w)
762{
763 w->active = 0;
764}
765
766/*****************************************************************************/
767
768void
769ev_io_start (struct ev_io *w)
770{
771 int fd = w->fd;
772
773 if (ev_is_active (w))
774 return;
775
776 assert (("ev_io_start called with negative fd", fd >= 0));
777
778 ev_start ((W)w, 1);
779 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
780 wlist_add ((WL *)&anfds[fd].head, (WL)w);
781
782 fd_change (fd);
783}
784
785void
786ev_io_stop (struct ev_io *w)
787{
788 ev_clear_pending ((W)w);
789 if (!ev_is_active (w))
790 return;
791
792 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793 ev_stop ((W)w);
794
795 fd_change (w->fd);
796}
797
798void
799ev_timer_start (struct ev_timer *w)
800{
801 if (ev_is_active (w))
802 return;
803
804 w->at += now;
805
806 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807
808 ev_start ((W)w, ++timercnt);
809 array_needsize (timers, timermax, timercnt, );
810 timers [timercnt - 1] = w;
811 upheap ((WT *)timers, timercnt - 1);
812}
813
814void
815ev_timer_stop (struct ev_timer *w)
816{
817 ev_clear_pending ((W)w);
818 if (!ev_is_active (w))
819 return;
820
821 if (w->active < timercnt--)
822 {
823 timers [w->active - 1] = timers [timercnt];
824 downheap ((WT *)timers, timercnt, w->active - 1);
825 }
826
827 w->at = w->repeat;
828
829 ev_stop ((W)w);
830}
831
832void
833ev_timer_again (struct ev_timer *w)
834{
835 if (ev_is_active (w))
836 {
837 if (w->repeat)
838 {
839 w->at = now + w->repeat;
840 downheap ((WT *)timers, timercnt, w->active - 1);
841 }
842 else
843 ev_timer_stop (w);
844 }
845 else if (w->repeat)
846 ev_timer_start (w);
847}
848
849void
850ev_periodic_start (struct ev_periodic *w)
851{
852 if (ev_is_active (w))
853 return;
854
855 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856
857 /* this formula differs from the one in periodic_reify because we do not always round up */
858 if (w->interval)
859 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
860
861 ev_start ((W)w, ++periodiccnt);
862 array_needsize (periodics, periodicmax, periodiccnt, );
863 periodics [periodiccnt - 1] = w;
864 upheap ((WT *)periodics, periodiccnt - 1);
865}
866
867void
868ev_periodic_stop (struct ev_periodic *w)
869{
870 ev_clear_pending ((W)w);
871 if (!ev_is_active (w))
872 return;
873
874 if (w->active < periodiccnt--)
875 {
876 periodics [w->active - 1] = periodics [periodiccnt];
877 downheap ((WT *)periodics, periodiccnt, w->active - 1);
878 }
879
880 ev_stop ((W)w);
881}
882
883void
884ev_signal_start (struct ev_signal *w)
885{
886 if (ev_is_active (w))
887 return;
888
889 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890
891 ev_start ((W)w, 1);
892 array_needsize (signals, signalmax, w->signum, signals_init);
893 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894
895 if (!w->next)
896 {
897 struct sigaction sa;
898 sa.sa_handler = sighandler;
899 sigfillset (&sa.sa_mask);
900 sa.sa_flags = 0;
901 sigaction (w->signum, &sa, 0);
902 }
903}
904
905void
906ev_signal_stop (struct ev_signal *w)
907{
908 ev_clear_pending ((W)w);
909 if (!ev_is_active (w))
910 return;
911
912 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913 ev_stop ((W)w);
914
915 if (!signals [w->signum - 1].head)
916 signal (w->signum, SIG_DFL);
917}
918
919void
920ev_idle_start (struct ev_idle *w)
921{
922 if (ev_is_active (w))
923 return;
924
925 ev_start ((W)w, ++idlecnt);
926 array_needsize (idles, idlemax, idlecnt, );
927 idles [idlecnt - 1] = w;
928}
929
930void
931ev_idle_stop (struct ev_idle *w)
932{
933 ev_clear_pending ((W)w);
934 if (ev_is_active (w))
935 return;
936
937 idles [w->active - 1] = idles [--idlecnt];
938 ev_stop ((W)w);
939}
940
941void
942ev_prepare_start (struct ev_prepare *w)
943{
944 if (ev_is_active (w))
945 return;
946
947 ev_start ((W)w, ++preparecnt);
948 array_needsize (prepares, preparemax, preparecnt, );
949 prepares [preparecnt - 1] = w;
950}
951
952void
953ev_prepare_stop (struct ev_prepare *w)
954{
955 ev_clear_pending ((W)w);
956 if (ev_is_active (w))
957 return;
958
959 prepares [w->active - 1] = prepares [--preparecnt];
960 ev_stop ((W)w);
961}
962
963void
964ev_check_start (struct ev_check *w)
965{
966 if (ev_is_active (w))
967 return;
968
969 ev_start ((W)w, ++checkcnt);
970 array_needsize (checks, checkmax, checkcnt, );
971 checks [checkcnt - 1] = w;
972}
973
974void
975ev_check_stop (struct ev_check *w)
976{
977 ev_clear_pending ((W)w);
978 if (ev_is_active (w))
979 return;
980
981 checks [w->active - 1] = checks [--checkcnt];
982 ev_stop ((W)w);
983}
984
985void
986ev_child_start (struct ev_child *w)
987{
988 if (ev_is_active (w))
989 return;
990
991 ev_start ((W)w, 1);
992 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993}
994
995void
996ev_child_stop (struct ev_child *w)
997{
998 ev_clear_pending ((W)w);
999 if (ev_is_active (w))
1000 return;
1001
1002 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003 ev_stop ((W)w);
1004}
1005
1006/*****************************************************************************/
1007
1008struct ev_once 3612struct ev_once
1009{ 3613{
1010 struct ev_io io; 3614 ev_io io;
1011 struct ev_timer to; 3615 ev_timer to;
1012 void (*cb)(int revents, void *arg); 3616 void (*cb)(int revents, void *arg);
1013 void *arg; 3617 void *arg;
1014}; 3618};
1015 3619
1016static void 3620static void
1017once_cb (struct ev_once *once, int revents) 3621once_cb (EV_P_ struct ev_once *once, int revents)
1018{ 3622{
1019 void (*cb)(int revents, void *arg) = once->cb; 3623 void (*cb)(int revents, void *arg) = once->cb;
1020 void *arg = once->arg; 3624 void *arg = once->arg;
1021 3625
1022 ev_io_stop (&once->io); 3626 ev_io_stop (EV_A_ &once->io);
1023 ev_timer_stop (&once->to); 3627 ev_timer_stop (EV_A_ &once->to);
1024 free (once); 3628 ev_free (once);
1025 3629
1026 cb (revents, arg); 3630 cb (revents, arg);
1027} 3631}
1028 3632
1029static void 3633static void
1030once_cb_io (struct ev_io *w, int revents) 3634once_cb_io (EV_P_ ev_io *w, int revents)
1031{ 3635{
1032 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3636 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3637
3638 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1033} 3639}
1034 3640
1035static void 3641static void
1036once_cb_to (struct ev_timer *w, int revents) 3642once_cb_to (EV_P_ ev_timer *w, int revents)
1037{ 3643{
1038 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3644 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1039}
1040 3645
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647}
3648
1041void 3649void
1042ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043{ 3651{
1044 struct ev_once *once = malloc (sizeof (struct ev_once)); 3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1045 3653
1046 if (!once) 3654 if (expect_false (!once))
3655 {
1047 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1048 else 3657 return;
1049 { 3658 }
3659
1050 once->cb = cb; 3660 once->cb = cb;
1051 once->arg = arg; 3661 once->arg = arg;
1052 3662
1053 ev_watcher_init (&once->io, once_cb_io); 3663 ev_init (&once->io, once_cb_io);
1054 if (fd >= 0) 3664 if (fd >= 0)
3665 {
3666 ev_io_set (&once->io, fd, events);
3667 ev_io_start (EV_A_ &once->io);
3668 }
3669
3670 ev_init (&once->to, once_cb_to);
3671 if (timeout >= 0.)
3672 {
3673 ev_timer_set (&once->to, timeout, 0.);
3674 ev_timer_start (EV_A_ &once->to);
3675 }
3676}
3677
3678/*****************************************************************************/
3679
3680#if EV_WALK_ENABLE
3681void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3683{
3684 int i, j;
3685 ev_watcher_list *wl, *wn;
3686
3687 if (types & (EV_IO | EV_EMBED))
3688 for (i = 0; i < anfdmax; ++i)
3689 for (wl = anfds [i].head; wl; )
1055 { 3690 {
1056 ev_io_set (&once->io, fd, events); 3691 wn = wl->next;
1057 ev_io_start (&once->io); 3692
3693#if EV_EMBED_ENABLE
3694 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3695 {
3696 if (types & EV_EMBED)
3697 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3698 }
3699 else
3700#endif
3701#if EV_USE_INOTIFY
3702 if (ev_cb ((ev_io *)wl) == infy_cb)
3703 ;
3704 else
3705#endif
3706 if ((ev_io *)wl != &pipe_w)
3707 if (types & EV_IO)
3708 cb (EV_A_ EV_IO, wl);
3709
3710 wl = wn;
1058 } 3711 }
1059 3712
1060 ev_watcher_init (&once->to, once_cb_to); 3713 if (types & (EV_TIMER | EV_STAT))
1061 if (timeout >= 0.) 3714 for (i = timercnt + HEAP0; i-- > HEAP0; )
3715#if EV_STAT_ENABLE
3716 /*TODO: timer is not always active*/
3717 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1062 { 3718 {
1063 ev_timer_set (&once->to, timeout, 0.); 3719 if (types & EV_STAT)
1064 ev_timer_start (&once->to); 3720 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1065 } 3721 }
1066 } 3722 else
1067} 3723#endif
3724 if (types & EV_TIMER)
3725 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1068 3726
1069/*****************************************************************************/ 3727#if EV_PERIODIC_ENABLE
3728 if (types & EV_PERIODIC)
3729 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif
1070 3732
1071#if 0 3733#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; )
3736 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif
1072 3739
1073struct ev_io wio; 3740#if EV_FORK_ENABLE
3741 if (types & EV_FORK)
3742 for (i = forkcnt; i--; )
3743 if (ev_cb (forks [i]) != embed_fork_cb)
3744 cb (EV_A_ EV_FORK, forks [i]);
3745#endif
1074 3746
1075static void 3747#if EV_ASYNC_ENABLE
1076sin_cb (struct ev_io *w, int revents) 3748 if (types & EV_ASYNC)
1077{ 3749 for (i = asynccnt; i--; )
1078 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3750 cb (EV_A_ EV_ASYNC, asyncs [i]);
1079} 3751#endif
1080 3752
1081static void 3753#if EV_PREPARE_ENABLE
1082ocb (struct ev_timer *w, int revents) 3754 if (types & EV_PREPARE)
1083{ 3755 for (i = preparecnt; i--; )
1084 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3756# if EV_EMBED_ENABLE
1085 ev_timer_stop (w); 3757 if (ev_cb (prepares [i]) != embed_prepare_cb)
1086 ev_timer_start (w);
1087}
1088
1089static void
1090scb (struct ev_signal *w, int revents)
1091{
1092 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093 ev_io_stop (&wio);
1094 ev_io_start (&wio);
1095}
1096
1097static void
1098gcb (struct ev_signal *w, int revents)
1099{
1100 fprintf (stderr, "generic %x\n", revents);
1101
1102}
1103
1104int main (void)
1105{
1106 ev_init (0);
1107
1108 ev_io_init (&wio, sin_cb, 0, EV_READ);
1109 ev_io_start (&wio);
1110
1111 struct ev_timer t[10000];
1112
1113#if 0
1114 int i;
1115 for (i = 0; i < 10000; ++i)
1116 {
1117 struct ev_timer *w = t + i;
1118 ev_watcher_init (w, ocb, i);
1119 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1120 ev_timer_start (w);
1121 if (drand48 () < 0.5)
1122 ev_timer_stop (w);
1123 }
1124#endif 3758# endif
1125 3759 cb (EV_A_ EV_PREPARE, prepares [i]);
1126 struct ev_timer t1;
1127 ev_timer_init (&t1, ocb, 5, 10);
1128 ev_timer_start (&t1);
1129
1130 struct ev_signal sig;
1131 ev_signal_init (&sig, scb, SIGQUIT);
1132 ev_signal_start (&sig);
1133
1134 struct ev_check cw;
1135 ev_check_init (&cw, gcb);
1136 ev_check_start (&cw);
1137
1138 struct ev_idle iw;
1139 ev_idle_init (&iw, gcb);
1140 ev_idle_start (&iw);
1141
1142 ev_loop (0);
1143
1144 return 0;
1145}
1146
1147#endif 3760#endif
1148 3761
3762#if EV_CHECK_ENABLE
3763 if (types & EV_CHECK)
3764 for (i = checkcnt; i--; )
3765 cb (EV_A_ EV_CHECK, checks [i]);
3766#endif
1149 3767
3768#if EV_SIGNAL_ENABLE
3769 if (types & EV_SIGNAL)
3770 for (i = 0; i < EV_NSIG - 1; ++i)
3771 for (wl = signals [i].head; wl; )
3772 {
3773 wn = wl->next;
3774 cb (EV_A_ EV_SIGNAL, wl);
3775 wl = wn;
3776 }
3777#endif
1150 3778
3779#if EV_CHILD_ENABLE
3780 if (types & EV_CHILD)
3781 for (i = (EV_PID_HASHSIZE); i--; )
3782 for (wl = childs [i]; wl; )
3783 {
3784 wn = wl->next;
3785 cb (EV_A_ EV_CHILD, wl);
3786 wl = wn;
3787 }
3788#endif
3789/* EV_STAT 0x00001000 /* stat data changed */
3790/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3791}
3792#endif
1151 3793
3794#if EV_MULTIPLICITY
3795 #include "ev_wrap.h"
3796#endif
3797
3798EV_CPP(})
3799

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