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Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.352 by root, Thu Oct 21 02:33:08 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * 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
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
30# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# if HAVE_NANOSLEEP
83# ifndef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP EV_FEATURE_OS
85# endif
86# else
87# undef EV_USE_NANOSLEEP
88# define EV_USE_NANOSLEEP 0
89# endif
90
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# ifndef EV_USE_SELECT
93# define EV_USE_SELECT EV_FEATURE_BACKENDS
94# endif
95# else
96# undef EV_USE_SELECT
97# define EV_USE_SELECT 0
98# endif
99
100# if HAVE_POLL && HAVE_POLL_H
101# ifndef EV_USE_POLL
102# define EV_USE_POLL EV_FEATURE_BACKENDS
103# endif
104# else
105# undef EV_USE_POLL
106# define EV_USE_POLL 0
107# endif
108
109# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
110# ifndef EV_USE_EPOLL
111# define EV_USE_EPOLL EV_FEATURE_BACKENDS
112# endif
113# else
114# undef EV_USE_EPOLL
115# define EV_USE_EPOLL 0
116# endif
117
118# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
119# ifndef EV_USE_KQUEUE
120# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
121# endif
122# else
123# undef EV_USE_KQUEUE
124# define EV_USE_KQUEUE 0
125# endif
126
127# if HAVE_PORT_H && HAVE_PORT_CREATE
128# ifndef EV_USE_PORT
129# define EV_USE_PORT EV_FEATURE_BACKENDS
130# endif
131# else
132# undef EV_USE_PORT
133# define EV_USE_PORT 0
134# endif
135
136# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
137# ifndef EV_USE_INOTIFY
138# define EV_USE_INOTIFY EV_FEATURE_OS
139# endif
140# else
141# undef EV_USE_INOTIFY
142# define EV_USE_INOTIFY 0
143# endif
144
145# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
146# ifndef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD EV_FEATURE_OS
148# endif
149# else
150# undef EV_USE_SIGNALFD
151# define EV_USE_SIGNALFD 0
152# endif
153
154# if HAVE_EVENTFD
155# ifndef EV_USE_EVENTFD
156# define EV_USE_EVENTFD EV_FEATURE_OS
157# endif
158# else
159# undef EV_USE_EVENTFD
160# define EV_USE_EVENTFD 0
161# endif
162
31#endif 163#endif
32 164
33#include <math.h> 165#include <math.h>
34#include <stdlib.h> 166#include <stdlib.h>
35#include <unistd.h> 167#include <string.h>
36#include <fcntl.h> 168#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 169#include <stddef.h>
39 170
40#include <stdio.h> 171#include <stdio.h>
41 172
42#include <assert.h> 173#include <assert.h>
43#include <errno.h> 174#include <errno.h>
44#include <sys/types.h> 175#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 176#include <time.h>
177#include <limits.h>
178
179#include <signal.h>
180
181#ifdef EV_H
182# include EV_H
183#else
184# include "ev.h"
185#endif
186
187#ifndef _WIN32
188# include <sys/time.h>
189# include <sys/wait.h>
190# include <unistd.h>
191#else
192# include <io.h>
193# define WIN32_LEAN_AND_MEAN
194# include <windows.h>
195# ifndef EV_SELECT_IS_WINSOCKET
196# define EV_SELECT_IS_WINSOCKET 1
197# endif
198# undef EV_AVOID_STDIO
199#endif
200
201/* OS X, in its infinite idiocy, actually HARDCODES
202 * a limit of 1024 into their select. Where people have brains,
203 * OS X engineers apparently have a vacuum. Or maybe they were
204 * ordered to have a vacuum, or they do anything for money.
205 * This might help. Or not.
206 */
207#define _DARWIN_UNLIMITED_SELECT 1
208
209/* this block tries to deduce configuration from header-defined symbols and defaults */
210
211/* try to deduce the maximum number of signals on this platform */
212#if defined (EV_NSIG)
213/* use what's provided */
214#elif defined (NSIG)
215# define EV_NSIG (NSIG)
216#elif defined(_NSIG)
217# define EV_NSIG (_NSIG)
218#elif defined (SIGMAX)
219# define EV_NSIG (SIGMAX+1)
220#elif defined (SIG_MAX)
221# define EV_NSIG (SIG_MAX+1)
222#elif defined (_SIG_MAX)
223# define EV_NSIG (_SIG_MAX+1)
224#elif defined (MAXSIG)
225# define EV_NSIG (MAXSIG+1)
226#elif defined (MAX_SIG)
227# define EV_NSIG (MAX_SIG+1)
228#elif defined (SIGARRAYSIZE)
229# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
230#elif defined (_sys_nsig)
231# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
232#else
233# error "unable to find value for NSIG, please report"
234/* to make it compile regardless, just remove the above line, */
235/* but consider reporting it, too! :) */
236# define EV_NSIG 65
237#endif
238
239#ifndef EV_USE_CLOCK_SYSCALL
240# if __linux && __GLIBC__ >= 2
241# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
242# else
243# define EV_USE_CLOCK_SYSCALL 0
244# endif
245#endif
48 246
49#ifndef EV_USE_MONOTONIC 247#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC 248# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
249# define EV_USE_MONOTONIC EV_FEATURE_OS
250# else
251# define EV_USE_MONOTONIC 0
252# endif
253#endif
254
255#ifndef EV_USE_REALTIME
256# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
257#endif
258
259#ifndef EV_USE_NANOSLEEP
260# if _POSIX_C_SOURCE >= 199309L
261# define EV_USE_NANOSLEEP EV_FEATURE_OS
262# else
263# define EV_USE_NANOSLEEP 0
264# endif
265#endif
266
267#ifndef EV_USE_SELECT
268# define EV_USE_SELECT EV_FEATURE_BACKENDS
269#endif
270
271#ifndef EV_USE_POLL
272# ifdef _WIN32
273# define EV_USE_POLL 0
274# else
275# define EV_USE_POLL EV_FEATURE_BACKENDS
276# endif
277#endif
278
279#ifndef EV_USE_EPOLL
280# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
281# define EV_USE_EPOLL EV_FEATURE_BACKENDS
282# else
283# define EV_USE_EPOLL 0
284# endif
285#endif
286
287#ifndef EV_USE_KQUEUE
288# define EV_USE_KQUEUE 0
289#endif
290
291#ifndef EV_USE_PORT
292# define EV_USE_PORT 0
293#endif
294
295#ifndef EV_USE_INOTIFY
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_INOTIFY EV_FEATURE_OS
298# else
299# define EV_USE_INOTIFY 0
300# endif
301#endif
302
303#ifndef EV_PID_HASHSIZE
304# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
305#endif
306
307#ifndef EV_INOTIFY_HASHSIZE
308# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
309#endif
310
311#ifndef EV_USE_EVENTFD
312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
313# define EV_USE_EVENTFD EV_FEATURE_OS
314# else
315# define EV_USE_EVENTFD 0
316# endif
317#endif
318
319#ifndef EV_USE_SIGNALFD
320# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
321# define EV_USE_SIGNALFD EV_FEATURE_OS
322# else
323# define EV_USE_SIGNALFD 0
324# endif
325#endif
326
327#if 0 /* debugging */
328# define EV_VERIFY 3
329# define EV_USE_4HEAP 1
330# define EV_HEAP_CACHE_AT 1
331#endif
332
333#ifndef EV_VERIFY
334# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
335#endif
336
337#ifndef EV_USE_4HEAP
338# define EV_USE_4HEAP EV_FEATURE_DATA
339#endif
340
341#ifndef EV_HEAP_CACHE_AT
342# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
343#endif
344
345/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
346/* which makes programs even slower. might work on other unices, too. */
347#if EV_USE_CLOCK_SYSCALL
348# include <syscall.h>
349# ifdef SYS_clock_gettime
350# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
351# undef EV_USE_MONOTONIC
51# define EV_USE_MONOTONIC 1 352# define EV_USE_MONOTONIC 1
353# else
354# undef EV_USE_CLOCK_SYSCALL
355# define EV_USE_CLOCK_SYSCALL 0
52# endif 356# endif
53#endif 357#endif
54 358
55#ifndef EV_USE_SELECT 359/* this block fixes any misconfiguration where we know we run into trouble otherwise */
56# define EV_USE_SELECT 1
57#endif
58 360
361#ifdef _AIX
362/* AIX has a completely broken poll.h header */
59#ifndef EV_USE_EPOLL 363# undef EV_USE_POLL
60# define EV_USE_EPOLL 0 364# define EV_USE_POLL 0
365#endif
366
367#ifndef CLOCK_MONOTONIC
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 0
61#endif 370#endif
62 371
63#ifndef CLOCK_REALTIME 372#ifndef CLOCK_REALTIME
373# undef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 374# define EV_USE_REALTIME 0
65#endif 375#endif
66#ifndef EV_USE_REALTIME 376
67# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 377#if !EV_STAT_ENABLE
378# undef EV_USE_INOTIFY
379# define EV_USE_INOTIFY 0
380#endif
381
382#if !EV_USE_NANOSLEEP
383# ifndef _WIN32
384# include <sys/select.h>
68#endif 385# endif
386#endif
387
388#if EV_USE_INOTIFY
389# include <sys/utsname.h>
390# include <sys/statfs.h>
391# include <sys/inotify.h>
392/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
393# ifndef IN_DONT_FOLLOW
394# undef EV_USE_INOTIFY
395# define EV_USE_INOTIFY 0
396# endif
397#endif
398
399#if EV_SELECT_IS_WINSOCKET
400# include <winsock.h>
401#endif
402
403#if EV_USE_EVENTFD
404/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
405# include <stdint.h>
406# ifndef EFD_NONBLOCK
407# define EFD_NONBLOCK O_NONBLOCK
408# endif
409# ifndef EFD_CLOEXEC
410# ifdef O_CLOEXEC
411# define EFD_CLOEXEC O_CLOEXEC
412# else
413# define EFD_CLOEXEC 02000000
414# endif
415# endif
416# ifdef __cplusplus
417extern "C" {
418# endif
419int (eventfd) (unsigned int initval, int flags);
420# ifdef __cplusplus
421}
422# endif
423#endif
424
425#if EV_USE_SIGNALFD
426/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427# include <stdint.h>
428# ifndef SFD_NONBLOCK
429# define SFD_NONBLOCK O_NONBLOCK
430# endif
431# ifndef SFD_CLOEXEC
432# ifdef O_CLOEXEC
433# define SFD_CLOEXEC O_CLOEXEC
434# else
435# define SFD_CLOEXEC 02000000
436# endif
437# endif
438# ifdef __cplusplus
439extern "C" {
440# endif
441int signalfd (int fd, const sigset_t *mask, int flags);
442
443struct signalfd_siginfo
444{
445 uint32_t ssi_signo;
446 char pad[128 - sizeof (uint32_t)];
447};
448# ifdef __cplusplus
449}
450# endif
451#endif
452
453/**/
454
455#if EV_VERIFY >= 3
456# define EV_FREQUENT_CHECK ev_verify (EV_A)
457#else
458# define EV_FREQUENT_CHECK do { } while (0)
459#endif
460
461/*
462 * This is used to avoid floating point rounding problems.
463 * It is added to ev_rt_now when scheduling periodics
464 * to ensure progress, time-wise, even when rounding
465 * errors are against us.
466 * This value is good at least till the year 4000.
467 * Better solutions welcome.
468 */
469#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
69 470
70#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 471#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 472#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74 473
75#include "ev.h" 474#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
475#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
76 476
477#if __GNUC__ >= 4
478# define expect(expr,value) __builtin_expect ((expr),(value))
479# define noinline __attribute__ ((noinline))
480#else
481# define expect(expr,value) (expr)
482# define noinline
483# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
484# define inline
485# endif
486#endif
487
488#define expect_false(expr) expect ((expr) != 0, 0)
489#define expect_true(expr) expect ((expr) != 0, 1)
490#define inline_size static inline
491
492#if EV_FEATURE_CODE
493# define inline_speed static inline
494#else
495# define inline_speed static noinline
496#endif
497
498#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
499
500#if EV_MINPRI == EV_MAXPRI
501# define ABSPRI(w) (((W)w), 0)
502#else
503# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
504#endif
505
506#define EMPTY /* required for microsofts broken pseudo-c compiler */
507#define EMPTY2(a,b) /* used to suppress some warnings */
508
77typedef struct ev_watcher *W; 509typedef ev_watcher *W;
78typedef struct ev_watcher_list *WL; 510typedef ev_watcher_list *WL;
79typedef struct ev_watcher_time *WT; 511typedef ev_watcher_time *WT;
80 512
81static ev_tstamp now, diff; /* monotonic clock */ 513#define ev_active(w) ((W)(w))->active
82ev_tstamp ev_now; 514#define ev_at(w) ((WT)(w))->at
83int ev_method;
84 515
85static int have_monotonic; /* runtime */ 516#if EV_USE_REALTIME
517/* sig_atomic_t is used to avoid per-thread variables or locking but still */
518/* giving it a reasonably high chance of working on typical architectures */
519static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
520#endif
86 521
87static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 522#if EV_USE_MONOTONIC
88static void (*method_modify)(int fd, int oev, int nev); 523static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
89static void (*method_poll)(ev_tstamp timeout); 524#endif
525
526#ifndef EV_FD_TO_WIN32_HANDLE
527# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
528#endif
529#ifndef EV_WIN32_HANDLE_TO_FD
530# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
531#endif
532#ifndef EV_WIN32_CLOSE_FD
533# define EV_WIN32_CLOSE_FD(fd) close (fd)
534#endif
535
536#ifdef _WIN32
537# include "ev_win32.c"
538#endif
90 539
91/*****************************************************************************/ 540/*****************************************************************************/
92 541
542#if EV_AVOID_STDIO
543static void noinline
544ev_printerr (const char *msg)
545{
546 write (STDERR_FILENO, msg, strlen (msg));
547}
548#endif
549
550static void (*syserr_cb)(const char *msg);
551
552void
553ev_set_syserr_cb (void (*cb)(const char *msg))
554{
555 syserr_cb = cb;
556}
557
558static void noinline
559ev_syserr (const char *msg)
560{
561 if (!msg)
562 msg = "(libev) system error";
563
564 if (syserr_cb)
565 syserr_cb (msg);
566 else
567 {
568#if EV_AVOID_STDIO
569 const char *err = strerror (errno);
570
571 ev_printerr (msg);
572 ev_printerr (": ");
573 ev_printerr (err);
574 ev_printerr ("\n");
575#else
576 perror (msg);
577#endif
578 abort ();
579 }
580}
581
582static void *
583ev_realloc_emul (void *ptr, long size)
584{
585#if __GLIBC__
586 return realloc (ptr, size);
587#else
588 /* some systems, notably openbsd and darwin, fail to properly
589 * implement realloc (x, 0) (as required by both ansi c-89 and
590 * the single unix specification, so work around them here.
591 */
592
593 if (size)
594 return realloc (ptr, size);
595
596 free (ptr);
597 return 0;
598#endif
599}
600
601static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
602
603void
604ev_set_allocator (void *(*cb)(void *ptr, long size))
605{
606 alloc = cb;
607}
608
609inline_speed void *
610ev_realloc (void *ptr, long size)
611{
612 ptr = alloc (ptr, size);
613
614 if (!ptr && size)
615 {
616#if EV_AVOID_STDIO
617 ev_printerr ("libev: memory allocation failed, aborting.\n");
618#else
619 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
620#endif
621 abort ();
622 }
623
624 return ptr;
625}
626
627#define ev_malloc(size) ev_realloc (0, (size))
628#define ev_free(ptr) ev_realloc ((ptr), 0)
629
630/*****************************************************************************/
631
632/* set in reify when reification needed */
633#define EV_ANFD_REIFY 1
634
635/* file descriptor info structure */
636typedef struct
637{
638 WL head;
639 unsigned char events; /* the events watched for */
640 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
641 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
642 unsigned char unused;
643#if EV_USE_EPOLL
644 unsigned int egen; /* generation counter to counter epoll bugs */
645#endif
646#if EV_SELECT_IS_WINSOCKET
647 SOCKET handle;
648#endif
649} ANFD;
650
651/* stores the pending event set for a given watcher */
652typedef struct
653{
654 W w;
655 int events; /* the pending event set for the given watcher */
656} ANPENDING;
657
658#if EV_USE_INOTIFY
659/* hash table entry per inotify-id */
660typedef struct
661{
662 WL head;
663} ANFS;
664#endif
665
666/* Heap Entry */
667#if EV_HEAP_CACHE_AT
668 /* a heap element */
669 typedef struct {
670 ev_tstamp at;
671 WT w;
672 } ANHE;
673
674 #define ANHE_w(he) (he).w /* access watcher, read-write */
675 #define ANHE_at(he) (he).at /* access cached at, read-only */
676 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
677#else
678 /* a heap element */
679 typedef WT ANHE;
680
681 #define ANHE_w(he) (he)
682 #define ANHE_at(he) (he)->at
683 #define ANHE_at_cache(he)
684#endif
685
686#if EV_MULTIPLICITY
687
688 struct ev_loop
689 {
690 ev_tstamp ev_rt_now;
691 #define ev_rt_now ((loop)->ev_rt_now)
692 #define VAR(name,decl) decl;
693 #include "ev_vars.h"
694 #undef VAR
695 };
696 #include "ev_wrap.h"
697
698 static struct ev_loop default_loop_struct;
699 struct ev_loop *ev_default_loop_ptr;
700
701#else
702
703 ev_tstamp ev_rt_now;
704 #define VAR(name,decl) static decl;
705 #include "ev_vars.h"
706 #undef VAR
707
708 static int ev_default_loop_ptr;
709
710#endif
711
712#if EV_FEATURE_API
713# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
714# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
715# define EV_INVOKE_PENDING invoke_cb (EV_A)
716#else
717# define EV_RELEASE_CB (void)0
718# define EV_ACQUIRE_CB (void)0
719# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720#endif
721
722#define EVUNLOOP_RECURSE 0x80
723
724/*****************************************************************************/
725
726#ifndef EV_HAVE_EV_TIME
93ev_tstamp 727ev_tstamp
94ev_time (void) 728ev_time (void)
95{ 729{
96#if EV_USE_REALTIME 730#if EV_USE_REALTIME
731 if (expect_true (have_realtime))
732 {
97 struct timespec ts; 733 struct timespec ts;
98 clock_gettime (CLOCK_REALTIME, &ts); 734 clock_gettime (CLOCK_REALTIME, &ts);
99 return ts.tv_sec + ts.tv_nsec * 1e-9; 735 return ts.tv_sec + ts.tv_nsec * 1e-9;
100#else 736 }
737#endif
738
101 struct timeval tv; 739 struct timeval tv;
102 gettimeofday (&tv, 0); 740 gettimeofday (&tv, 0);
103 return tv.tv_sec + tv.tv_usec * 1e-6; 741 return tv.tv_sec + tv.tv_usec * 1e-6;
104#endif
105} 742}
743#endif
106 744
107static ev_tstamp 745inline_size ev_tstamp
108get_clock (void) 746get_clock (void)
109{ 747{
110#if EV_USE_MONOTONIC 748#if EV_USE_MONOTONIC
111 if (have_monotonic) 749 if (expect_true (have_monotonic))
112 { 750 {
113 struct timespec ts; 751 struct timespec ts;
114 clock_gettime (CLOCK_MONOTONIC, &ts); 752 clock_gettime (CLOCK_MONOTONIC, &ts);
115 return ts.tv_sec + ts.tv_nsec * 1e-9; 753 return ts.tv_sec + ts.tv_nsec * 1e-9;
116 } 754 }
117#endif 755#endif
118 756
119 return ev_time (); 757 return ev_time ();
120} 758}
121 759
122#define array_roundsize(base,n) ((n) | 4 & ~3) 760#if EV_MULTIPLICITY
761ev_tstamp
762ev_now (EV_P)
763{
764 return ev_rt_now;
765}
766#endif
123 767
124#define array_needsize(base,cur,cnt,init) \ 768void
125 if ((cnt) > cur) \ 769ev_sleep (ev_tstamp delay)
126 { \ 770{
127 int newcnt = cur; \ 771 if (delay > 0.)
128 do \
129 { \
130 newcnt = array_roundsize (base, newcnt << 1); \
131 } \
132 while ((cnt) > newcnt); \
133 \
134 base = realloc (base, sizeof (*base) * (newcnt)); \
135 init (base + cur, newcnt - cur); \
136 cur = newcnt; \
137 } 772 {
773#if EV_USE_NANOSLEEP
774 struct timespec ts;
775
776 EV_TS_SET (ts, delay);
777 nanosleep (&ts, 0);
778#elif defined(_WIN32)
779 Sleep ((unsigned long)(delay * 1e3));
780#else
781 struct timeval tv;
782
783 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
784 /* something not guaranteed by newer posix versions, but guaranteed */
785 /* by older ones */
786 EV_TV_SET (tv, delay);
787 select (0, 0, 0, 0, &tv);
788#endif
789 }
790}
138 791
139/*****************************************************************************/ 792/*****************************************************************************/
140 793
141typedef struct 794#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142{
143 struct ev_io *head;
144 unsigned char events;
145 unsigned char reify;
146} ANFD;
147 795
148static ANFD *anfds; 796/* find a suitable new size for the given array, */
149static int anfdmax; 797/* hopefully by rounding to a nice-to-malloc size */
150 798inline_size int
151static void 799array_nextsize (int elem, int cur, int cnt)
152anfds_init (ANFD *base, int count)
153{ 800{
154 while (count--) 801 int ncur = cur + 1;
155 {
156 base->head = 0;
157 base->events = EV_NONE;
158 base->reify = 0;
159 802
160 ++base; 803 do
804 ncur <<= 1;
805 while (cnt > ncur);
806
807 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
808 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
161 } 809 {
162} 810 ncur *= elem;
163 811 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
164typedef struct 812 ncur = ncur - sizeof (void *) * 4;
165{ 813 ncur /= elem;
166 W w;
167 int events;
168} ANPENDING;
169
170static ANPENDING *pendings;
171static int pendingmax, pendingcnt;
172
173static void
174event (W w, int events)
175{
176 if (w->pending)
177 { 814 }
815
816 return ncur;
817}
818
819static noinline void *
820array_realloc (int elem, void *base, int *cur, int cnt)
821{
822 *cur = array_nextsize (elem, *cur, cnt);
823 return ev_realloc (base, elem * *cur);
824}
825
826#define array_init_zero(base,count) \
827 memset ((void *)(base), 0, sizeof (*(base)) * (count))
828
829#define array_needsize(type,base,cur,cnt,init) \
830 if (expect_false ((cnt) > (cur))) \
831 { \
832 int ocur_ = (cur); \
833 (base) = (type *)array_realloc \
834 (sizeof (type), (base), &(cur), (cnt)); \
835 init ((base) + (ocur_), (cur) - ocur_); \
836 }
837
838#if 0
839#define array_slim(type,stem) \
840 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
841 { \
842 stem ## max = array_roundsize (stem ## cnt >> 1); \
843 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
844 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
845 }
846#endif
847
848#define array_free(stem, idx) \
849 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
850
851/*****************************************************************************/
852
853/* dummy callback for pending events */
854static void noinline
855pendingcb (EV_P_ ev_prepare *w, int revents)
856{
857}
858
859void noinline
860ev_feed_event (EV_P_ void *w, int revents)
861{
862 W w_ = (W)w;
863 int pri = ABSPRI (w_);
864
865 if (expect_false (w_->pending))
866 pendings [pri][w_->pending - 1].events |= revents;
867 else
868 {
869 w_->pending = ++pendingcnt [pri];
870 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
871 pendings [pri][w_->pending - 1].w = w_;
178 pendings [w->pending - 1].events |= events; 872 pendings [pri][w_->pending - 1].events = revents;
179 return;
180 } 873 }
181
182 w->pending = ++pendingcnt;
183 array_needsize (pendings, pendingmax, pendingcnt, );
184 pendings [pendingcnt - 1].w = w;
185 pendings [pendingcnt - 1].events = events;
186} 874}
187 875
188static void 876inline_speed void
877feed_reverse (EV_P_ W w)
878{
879 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
880 rfeeds [rfeedcnt++] = w;
881}
882
883inline_size void
884feed_reverse_done (EV_P_ int revents)
885{
886 do
887 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
888 while (rfeedcnt);
889}
890
891inline_speed void
189queue_events (W *events, int eventcnt, int type) 892queue_events (EV_P_ W *events, int eventcnt, int type)
190{ 893{
191 int i; 894 int i;
192 895
193 for (i = 0; i < eventcnt; ++i) 896 for (i = 0; i < eventcnt; ++i)
194 event (events [i], type); 897 ev_feed_event (EV_A_ events [i], type);
195} 898}
196 899
197static void 900/*****************************************************************************/
901
902inline_speed void
198fd_event (int fd, int events) 903fd_event_nocheck (EV_P_ int fd, int revents)
199{ 904{
200 ANFD *anfd = anfds + fd; 905 ANFD *anfd = anfds + fd;
201 struct ev_io *w; 906 ev_io *w;
202 907
203 for (w = anfd->head; w; w = w->next) 908 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
204 { 909 {
205 int ev = w->events & events; 910 int ev = w->events & revents;
206 911
207 if (ev) 912 if (ev)
208 event ((W)w, ev); 913 ev_feed_event (EV_A_ (W)w, ev);
209 } 914 }
210} 915}
211 916
212/*****************************************************************************/ 917/* do not submit kernel events for fds that have reify set */
918/* because that means they changed while we were polling for new events */
919inline_speed void
920fd_event (EV_P_ int fd, int revents)
921{
922 ANFD *anfd = anfds + fd;
213 923
214static int *fdchanges; 924 if (expect_true (!anfd->reify))
215static int fdchangemax, fdchangecnt; 925 fd_event_nocheck (EV_A_ fd, revents);
926}
216 927
217static void 928void
218fd_reify (void) 929ev_feed_fd_event (EV_P_ int fd, int revents)
930{
931 if (fd >= 0 && fd < anfdmax)
932 fd_event_nocheck (EV_A_ fd, revents);
933}
934
935/* make sure the external fd watch events are in-sync */
936/* with the kernel/libev internal state */
937inline_size void
938fd_reify (EV_P)
219{ 939{
220 int i; 940 int i;
221 941
222 for (i = 0; i < fdchangecnt; ++i) 942 for (i = 0; i < fdchangecnt; ++i)
223 { 943 {
224 int fd = fdchanges [i]; 944 int fd = fdchanges [i];
225 ANFD *anfd = anfds + fd; 945 ANFD *anfd = anfds + fd;
226 struct ev_io *w; 946 ev_io *w;
227 947
228 int events = 0; 948 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify;
229 950
230 for (w = anfd->head; w; w = w->next)
231 events |= w->events;
232
233 anfd->reify = 0; 951 anfd->reify = 0;
234 952
235 if (anfd->events != events) 953#if EV_SELECT_IS_WINSOCKET
954 if (o_reify & EV__IOFDSET)
236 { 955 {
237 method_modify (fd, anfd->events, events); 956 unsigned long arg;
238 anfd->events = events; 957 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
958 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
239 } 959 }
960#endif
961
962 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
963 {
964 anfd->events = 0;
965
966 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
967 anfd->events |= (unsigned char)w->events;
968
969 if (o_events != anfd->events)
970 o_reify = EV__IOFDSET; /* actually |= */
971 }
972
973 if (o_reify & EV__IOFDSET)
974 backend_modify (EV_A_ fd, o_events, anfd->events);
240 } 975 }
241 976
242 fdchangecnt = 0; 977 fdchangecnt = 0;
243} 978}
244 979
245static void 980/* something about the given fd changed */
246fd_change (int fd) 981inline_size void
982fd_change (EV_P_ int fd, int flags)
247{ 983{
248 if (anfds [fd].reify || fdchangecnt < 0) 984 unsigned char reify = anfds [fd].reify;
249 return;
250
251 anfds [fd].reify = 1; 985 anfds [fd].reify |= flags;
252 986
987 if (expect_true (!reify))
988 {
253 ++fdchangecnt; 989 ++fdchangecnt;
254 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 990 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255 fdchanges [fdchangecnt - 1] = fd; 991 fdchanges [fdchangecnt - 1] = fd;
992 }
993}
994
995/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
996inline_speed void
997fd_kill (EV_P_ int fd)
998{
999 ev_io *w;
1000
1001 while ((w = (ev_io *)anfds [fd].head))
1002 {
1003 ev_io_stop (EV_A_ w);
1004 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1005 }
1006}
1007
1008/* check whether the given fd is actually valid, for error recovery */
1009inline_size int
1010fd_valid (int fd)
1011{
1012#ifdef _WIN32
1013 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1014#else
1015 return fcntl (fd, F_GETFD) != -1;
1016#endif
256} 1017}
257 1018
258/* called on EBADF to verify fds */ 1019/* called on EBADF to verify fds */
259static void 1020static void noinline
260fd_recheck (void) 1021fd_ebadf (EV_P)
261{ 1022{
262 int fd; 1023 int fd;
263 1024
264 for (fd = 0; fd < anfdmax; ++fd) 1025 for (fd = 0; fd < anfdmax; ++fd)
265 if (anfds [fd].events) 1026 if (anfds [fd].events)
266 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1027 if (!fd_valid (fd) && errno == EBADF)
267 while (anfds [fd].head) 1028 fd_kill (EV_A_ fd);
1029}
1030
1031/* called on ENOMEM in select/poll to kill some fds and retry */
1032static void noinline
1033fd_enomem (EV_P)
1034{
1035 int fd;
1036
1037 for (fd = anfdmax; fd--; )
1038 if (anfds [fd].events)
1039 {
1040 fd_kill (EV_A_ fd);
1041 break;
1042 }
1043}
1044
1045/* usually called after fork if backend needs to re-arm all fds from scratch */
1046static void noinline
1047fd_rearm_all (EV_P)
1048{
1049 int fd;
1050
1051 for (fd = 0; fd < anfdmax; ++fd)
1052 if (anfds [fd].events)
1053 {
1054 anfds [fd].events = 0;
1055 anfds [fd].emask = 0;
1056 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1057 }
1058}
1059
1060/* used to prepare libev internal fd's */
1061/* this is not fork-safe */
1062inline_speed void
1063fd_intern (int fd)
1064{
1065#ifdef _WIN32
1066 unsigned long arg = 1;
1067 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1068#else
1069 fcntl (fd, F_SETFD, FD_CLOEXEC);
1070 fcntl (fd, F_SETFL, O_NONBLOCK);
1071#endif
1072}
1073
1074/*****************************************************************************/
1075
1076/*
1077 * the heap functions want a real array index. array index 0 is guaranteed to not
1078 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1079 * the branching factor of the d-tree.
1080 */
1081
1082/*
1083 * at the moment we allow libev the luxury of two heaps,
1084 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1085 * which is more cache-efficient.
1086 * the difference is about 5% with 50000+ watchers.
1087 */
1088#if EV_USE_4HEAP
1089
1090#define DHEAP 4
1091#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1092#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1093#define UPHEAP_DONE(p,k) ((p) == (k))
1094
1095/* away from the root */
1096inline_speed void
1097downheap (ANHE *heap, int N, int k)
1098{
1099 ANHE he = heap [k];
1100 ANHE *E = heap + N + HEAP0;
1101
1102 for (;;)
1103 {
1104 ev_tstamp minat;
1105 ANHE *minpos;
1106 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1107
1108 /* find minimum child */
1109 if (expect_true (pos + DHEAP - 1 < E))
1110 {
1111 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1112 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1113 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1114 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1115 }
1116 else if (pos < E)
1117 {
1118 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1119 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1120 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1121 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1122 }
1123 else
1124 break;
1125
1126 if (ANHE_at (he) <= minat)
1127 break;
1128
1129 heap [k] = *minpos;
1130 ev_active (ANHE_w (*minpos)) = k;
1131
1132 k = minpos - heap;
1133 }
1134
1135 heap [k] = he;
1136 ev_active (ANHE_w (he)) = k;
1137}
1138
1139#else /* 4HEAP */
1140
1141#define HEAP0 1
1142#define HPARENT(k) ((k) >> 1)
1143#define UPHEAP_DONE(p,k) (!(p))
1144
1145/* away from the root */
1146inline_speed void
1147downheap (ANHE *heap, int N, int k)
1148{
1149 ANHE he = heap [k];
1150
1151 for (;;)
1152 {
1153 int c = k << 1;
1154
1155 if (c >= N + HEAP0)
1156 break;
1157
1158 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1159 ? 1 : 0;
1160
1161 if (ANHE_at (he) <= ANHE_at (heap [c]))
1162 break;
1163
1164 heap [k] = heap [c];
1165 ev_active (ANHE_w (heap [k])) = k;
1166
1167 k = c;
1168 }
1169
1170 heap [k] = he;
1171 ev_active (ANHE_w (he)) = k;
1172}
1173#endif
1174
1175/* towards the root */
1176inline_speed void
1177upheap (ANHE *heap, int k)
1178{
1179 ANHE he = heap [k];
1180
1181 for (;;)
1182 {
1183 int p = HPARENT (k);
1184
1185 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1186 break;
1187
1188 heap [k] = heap [p];
1189 ev_active (ANHE_w (heap [k])) = k;
1190 k = p;
1191 }
1192
1193 heap [k] = he;
1194 ev_active (ANHE_w (he)) = k;
1195}
1196
1197/* move an element suitably so it is in a correct place */
1198inline_size void
1199adjustheap (ANHE *heap, int N, int k)
1200{
1201 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1202 upheap (heap, k);
1203 else
1204 downheap (heap, N, k);
1205}
1206
1207/* rebuild the heap: this function is used only once and executed rarely */
1208inline_size void
1209reheap (ANHE *heap, int N)
1210{
1211 int i;
1212
1213 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1214 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1215 for (i = 0; i < N; ++i)
1216 upheap (heap, i + HEAP0);
1217}
1218
1219/*****************************************************************************/
1220
1221/* associate signal watchers to a signal signal */
1222typedef struct
1223{
1224 EV_ATOMIC_T pending;
1225#if EV_MULTIPLICITY
1226 EV_P;
1227#endif
1228 WL head;
1229} ANSIG;
1230
1231static ANSIG signals [EV_NSIG - 1];
1232
1233/*****************************************************************************/
1234
1235#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1236
1237static void noinline
1238evpipe_init (EV_P)
1239{
1240 if (!ev_is_active (&pipe_w))
1241 {
1242# if EV_USE_EVENTFD
1243 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1244 if (evfd < 0 && errno == EINVAL)
1245 evfd = eventfd (0, 0);
1246
1247 if (evfd >= 0)
1248 {
1249 evpipe [0] = -1;
1250 fd_intern (evfd); /* doing it twice doesn't hurt */
1251 ev_io_set (&pipe_w, evfd, EV_READ);
1252 }
1253 else
1254# endif
1255 {
1256 while (pipe (evpipe))
1257 ev_syserr ("(libev) error creating signal/async pipe");
1258
1259 fd_intern (evpipe [0]);
1260 fd_intern (evpipe [1]);
1261 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1262 }
1263
1264 ev_io_start (EV_A_ &pipe_w);
1265 ev_unref (EV_A); /* watcher should not keep loop alive */
1266 }
1267}
1268
1269inline_size void
1270evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1271{
1272 if (!*flag)
1273 {
1274 int old_errno = errno; /* save errno because write might clobber it */
1275 char dummy;
1276
1277 *flag = 1;
1278
1279#if EV_USE_EVENTFD
1280 if (evfd >= 0)
1281 {
1282 uint64_t counter = 1;
1283 write (evfd, &counter, sizeof (uint64_t));
1284 }
1285 else
1286#endif
1287 /* win32 people keep sending patches that change this write() to send() */
1288 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1289 /* so when you think this write should be a send instead, please find out */
1290 /* where your send() is from - it's definitely not the microsoft send, and */
1291 /* tell me. thank you. */
1292 write (evpipe [1], &dummy, 1);
1293
1294 errno = old_errno;
1295 }
1296}
1297
1298/* called whenever the libev signal pipe */
1299/* got some events (signal, async) */
1300static void
1301pipecb (EV_P_ ev_io *iow, int revents)
1302{
1303 int i;
1304
1305#if EV_USE_EVENTFD
1306 if (evfd >= 0)
1307 {
1308 uint64_t counter;
1309 read (evfd, &counter, sizeof (uint64_t));
1310 }
1311 else
1312#endif
1313 {
1314 char dummy;
1315 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1316 read (evpipe [0], &dummy, 1);
1317 }
1318
1319 if (sig_pending)
1320 {
1321 sig_pending = 0;
1322
1323 for (i = EV_NSIG - 1; i--; )
1324 if (expect_false (signals [i].pending))
1325 ev_feed_signal_event (EV_A_ i + 1);
1326 }
1327
1328#if EV_ASYNC_ENABLE
1329 if (async_pending)
1330 {
1331 async_pending = 0;
1332
1333 for (i = asynccnt; i--; )
1334 if (asyncs [i]->sent)
268 { 1335 {
269 ev_io_stop (anfds [fd].head); 1336 asyncs [i]->sent = 0;
270 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 1337 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
271 } 1338 }
1339 }
1340#endif
272} 1341}
273 1342
274/*****************************************************************************/ 1343/*****************************************************************************/
275 1344
276static struct ev_timer **timers;
277static int timermax, timercnt;
278
279static struct ev_periodic **periodics;
280static int periodicmax, periodiccnt;
281
282static void 1345static void
283upheap (WT *timers, int k) 1346ev_sighandler (int signum)
284{ 1347{
285 WT w = timers [k]; 1348#if EV_MULTIPLICITY
1349 EV_P = signals [signum - 1].loop;
1350#endif
286 1351
287 while (k && timers [k >> 1]->at > w->at) 1352#ifdef _WIN32
288 { 1353 signal (signum, ev_sighandler);
289 timers [k] = timers [k >> 1]; 1354#endif
290 timers [k]->active = k + 1;
291 k >>= 1;
292 }
293 1355
294 timers [k] = w; 1356 signals [signum - 1].pending = 1;
295 timers [k]->active = k + 1; 1357 evpipe_write (EV_A_ &sig_pending);
296
297} 1358}
298 1359
1360void noinline
1361ev_feed_signal_event (EV_P_ int signum)
1362{
1363 WL w;
1364
1365 if (expect_false (signum <= 0 || signum > EV_NSIG))
1366 return;
1367
1368 --signum;
1369
1370#if EV_MULTIPLICITY
1371 /* it is permissible to try to feed a signal to the wrong loop */
1372 /* or, likely more useful, feeding a signal nobody is waiting for */
1373
1374 if (expect_false (signals [signum].loop != EV_A))
1375 return;
1376#endif
1377
1378 signals [signum].pending = 0;
1379
1380 for (w = signals [signum].head; w; w = w->next)
1381 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1382}
1383
1384#if EV_USE_SIGNALFD
299static void 1385static void
300downheap (WT *timers, int N, int k) 1386sigfdcb (EV_P_ ev_io *iow, int revents)
301{ 1387{
302 WT w = timers [k]; 1388 struct signalfd_siginfo si[2], *sip; /* these structs are big */
303 1389
304 while (k < (N >> 1)) 1390 for (;;)
305 { 1391 {
306 int j = k << 1; 1392 ssize_t res = read (sigfd, si, sizeof (si));
307 1393
308 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1394 /* not ISO-C, as res might be -1, but works with SuS */
309 ++j; 1395 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1396 ev_feed_signal_event (EV_A_ sip->ssi_signo);
310 1397
311 if (w->at <= timers [j]->at) 1398 if (res < (ssize_t)sizeof (si))
312 break; 1399 break;
313
314 timers [k] = timers [j];
315 timers [k]->active = k + 1;
316 k = j;
317 } 1400 }
318
319 timers [k] = w;
320 timers [k]->active = k + 1;
321} 1401}
1402#endif
1403
1404#endif
322 1405
323/*****************************************************************************/ 1406/*****************************************************************************/
324 1407
325typedef struct 1408#if EV_CHILD_ENABLE
326{ 1409static WL childs [EV_PID_HASHSIZE];
327 struct ev_signal *head;
328 sig_atomic_t volatile gotsig;
329} ANSIG;
330 1410
331static ANSIG *signals;
332static int signalmax;
333
334static int sigpipe [2];
335static sig_atomic_t volatile gotsig;
336static struct ev_io sigev;
337
338static void
339signals_init (ANSIG *base, int count)
340{
341 while (count--)
342 {
343 base->head = 0;
344 base->gotsig = 0;
345
346 ++base;
347 }
348}
349
350static void
351sighandler (int signum)
352{
353 signals [signum - 1].gotsig = 1;
354
355 if (!gotsig)
356 {
357 gotsig = 1;
358 write (sigpipe [1], &signum, 1);
359 }
360}
361
362static void
363sigcb (struct ev_io *iow, int revents)
364{
365 struct ev_signal *w;
366 int sig;
367
368 read (sigpipe [0], &revents, 1);
369 gotsig = 0;
370
371 for (sig = signalmax; sig--; )
372 if (signals [sig].gotsig)
373 {
374 signals [sig].gotsig = 0;
375
376 for (w = signals [sig].head; w; w = w->next)
377 event ((W)w, EV_SIGNAL);
378 }
379}
380
381static void
382siginit (void)
383{
384 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387 /* rather than sort out wether we really need nb, set it */
388 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
390
391 ev_io_set (&sigev, sigpipe [0], EV_READ);
392 ev_io_start (&sigev);
393}
394
395/*****************************************************************************/
396
397static struct ev_idle **idles;
398static int idlemax, idlecnt;
399
400static struct ev_prepare **prepares;
401static int preparemax, preparecnt;
402
403static struct ev_check **checks;
404static int checkmax, checkcnt;
405
406/*****************************************************************************/
407
408static struct ev_child *childs [PID_HASHSIZE];
409static struct ev_signal childev; 1411static ev_signal childev;
1412
1413#ifndef WIFCONTINUED
1414# define WIFCONTINUED(status) 0
1415#endif
1416
1417/* handle a single child status event */
1418inline_speed void
1419child_reap (EV_P_ int chain, int pid, int status)
1420{
1421 ev_child *w;
1422 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1423
1424 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1425 {
1426 if ((w->pid == pid || !w->pid)
1427 && (!traced || (w->flags & 1)))
1428 {
1429 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1430 w->rpid = pid;
1431 w->rstatus = status;
1432 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1433 }
1434 }
1435}
410 1436
411#ifndef WCONTINUED 1437#ifndef WCONTINUED
412# define WCONTINUED 0 1438# define WCONTINUED 0
413#endif 1439#endif
414 1440
1441/* called on sigchld etc., calls waitpid */
415static void 1442static void
416childcb (struct ev_signal *sw, int revents) 1443childcb (EV_P_ ev_signal *sw, int revents)
417{ 1444{
418 struct ev_child *w;
419 int pid, status; 1445 int pid, status;
420 1446
1447 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
421 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1448 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1449 if (!WCONTINUED
423 if (w->pid == pid || w->pid == -1) 1450 || errno != EINVAL
424 { 1451 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
425 w->status = status; 1452 return;
426 event ((W)w, EV_CHILD); 1453
427 } 1454 /* make sure we are called again until all children have been reaped */
1455 /* we need to do it this way so that the callback gets called before we continue */
1456 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1457
1458 child_reap (EV_A_ pid, pid, status);
1459 if ((EV_PID_HASHSIZE) > 1)
1460 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
428} 1461}
1462
1463#endif
429 1464
430/*****************************************************************************/ 1465/*****************************************************************************/
431 1466
1467#if EV_USE_PORT
1468# include "ev_port.c"
1469#endif
1470#if EV_USE_KQUEUE
1471# include "ev_kqueue.c"
1472#endif
432#if EV_USE_EPOLL 1473#if EV_USE_EPOLL
433# include "ev_epoll.c" 1474# include "ev_epoll.c"
434#endif 1475#endif
1476#if EV_USE_POLL
1477# include "ev_poll.c"
1478#endif
435#if EV_USE_SELECT 1479#if EV_USE_SELECT
436# include "ev_select.c" 1480# include "ev_select.c"
437#endif 1481#endif
438 1482
439int 1483int
… …
446ev_version_minor (void) 1490ev_version_minor (void)
447{ 1491{
448 return EV_VERSION_MINOR; 1492 return EV_VERSION_MINOR;
449} 1493}
450 1494
451int ev_init (int flags) 1495/* return true if we are running with elevated privileges and should ignore env variables */
1496int inline_size
1497enable_secure (void)
452{ 1498{
453 if (!ev_method) 1499#ifdef _WIN32
1500 return 0;
1501#else
1502 return getuid () != geteuid ()
1503 || getgid () != getegid ();
1504#endif
1505}
1506
1507unsigned int
1508ev_supported_backends (void)
1509{
1510 unsigned int flags = 0;
1511
1512 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1513 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1514 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1515 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1516 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1517
1518 return flags;
1519}
1520
1521unsigned int
1522ev_recommended_backends (void)
1523{
1524 unsigned int flags = ev_supported_backends ();
1525
1526#ifndef __NetBSD__
1527 /* kqueue is borked on everything but netbsd apparently */
1528 /* it usually doesn't work correctly on anything but sockets and pipes */
1529 flags &= ~EVBACKEND_KQUEUE;
1530#endif
1531#ifdef __APPLE__
1532 /* only select works correctly on that "unix-certified" platform */
1533 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1534 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1535#endif
1536#ifdef __FreeBSD__
1537 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1538#endif
1539
1540 return flags;
1541}
1542
1543unsigned int
1544ev_embeddable_backends (void)
1545{
1546 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1547
1548 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1549 /* please fix it and tell me how to detect the fix */
1550 flags &= ~EVBACKEND_EPOLL;
1551
1552 return flags;
1553}
1554
1555unsigned int
1556ev_backend (EV_P)
1557{
1558 return backend;
1559}
1560
1561#if EV_FEATURE_API
1562unsigned int
1563ev_iteration (EV_P)
1564{
1565 return loop_count;
1566}
1567
1568unsigned int
1569ev_depth (EV_P)
1570{
1571 return loop_depth;
1572}
1573
1574void
1575ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1576{
1577 io_blocktime = interval;
1578}
1579
1580void
1581ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1582{
1583 timeout_blocktime = interval;
1584}
1585
1586void
1587ev_set_userdata (EV_P_ void *data)
1588{
1589 userdata = data;
1590}
1591
1592void *
1593ev_userdata (EV_P)
1594{
1595 return userdata;
1596}
1597
1598void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1599{
1600 invoke_cb = invoke_pending_cb;
1601}
1602
1603void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1604{
1605 release_cb = release;
1606 acquire_cb = acquire;
1607}
1608#endif
1609
1610/* initialise a loop structure, must be zero-initialised */
1611static void noinline
1612loop_init (EV_P_ unsigned int flags)
1613{
1614 if (!backend)
454 { 1615 {
1616#if EV_USE_REALTIME
1617 if (!have_realtime)
1618 {
1619 struct timespec ts;
1620
1621 if (!clock_gettime (CLOCK_REALTIME, &ts))
1622 have_realtime = 1;
1623 }
1624#endif
1625
455#if EV_USE_MONOTONIC 1626#if EV_USE_MONOTONIC
1627 if (!have_monotonic)
1628 {
1629 struct timespec ts;
1630
1631 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1632 have_monotonic = 1;
1633 }
1634#endif
1635
1636 /* pid check not overridable via env */
1637#ifndef _WIN32
1638 if (flags & EVFLAG_FORKCHECK)
1639 curpid = getpid ();
1640#endif
1641
1642 if (!(flags & EVFLAG_NOENV)
1643 && !enable_secure ()
1644 && getenv ("LIBEV_FLAGS"))
1645 flags = atoi (getenv ("LIBEV_FLAGS"));
1646
1647 ev_rt_now = ev_time ();
1648 mn_now = get_clock ();
1649 now_floor = mn_now;
1650 rtmn_diff = ev_rt_now - mn_now;
1651#if EV_FEATURE_API
1652 invoke_cb = ev_invoke_pending;
1653#endif
1654
1655 io_blocktime = 0.;
1656 timeout_blocktime = 0.;
1657 backend = 0;
1658 backend_fd = -1;
1659 sig_pending = 0;
1660#if EV_ASYNC_ENABLE
1661 async_pending = 0;
1662#endif
1663#if EV_USE_INOTIFY
1664 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1665#endif
1666#if EV_USE_SIGNALFD
1667 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1668#endif
1669
1670 if (!(flags & 0x0000ffffU))
1671 flags |= ev_recommended_backends ();
1672
1673#if EV_USE_PORT
1674 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1675#endif
1676#if EV_USE_KQUEUE
1677 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1678#endif
1679#if EV_USE_EPOLL
1680 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1681#endif
1682#if EV_USE_POLL
1683 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1684#endif
1685#if EV_USE_SELECT
1686 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1687#endif
1688
1689 ev_prepare_init (&pending_w, pendingcb);
1690
1691#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1692 ev_init (&pipe_w, pipecb);
1693 ev_set_priority (&pipe_w, EV_MAXPRI);
1694#endif
1695 }
1696}
1697
1698/* free up a loop structure */
1699static void noinline
1700loop_destroy (EV_P)
1701{
1702 int i;
1703
1704 if (ev_is_active (&pipe_w))
1705 {
1706 /*ev_ref (EV_A);*/
1707 /*ev_io_stop (EV_A_ &pipe_w);*/
1708
1709#if EV_USE_EVENTFD
1710 if (evfd >= 0)
1711 close (evfd);
1712#endif
1713
1714 if (evpipe [0] >= 0)
1715 {
1716 EV_WIN32_CLOSE_FD (evpipe [0]);
1717 EV_WIN32_CLOSE_FD (evpipe [1]);
1718 }
1719 }
1720
1721#if EV_USE_SIGNALFD
1722 if (ev_is_active (&sigfd_w))
1723 close (sigfd);
1724#endif
1725
1726#if EV_USE_INOTIFY
1727 if (fs_fd >= 0)
1728 close (fs_fd);
1729#endif
1730
1731 if (backend_fd >= 0)
1732 close (backend_fd);
1733
1734#if EV_USE_PORT
1735 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1736#endif
1737#if EV_USE_KQUEUE
1738 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1739#endif
1740#if EV_USE_EPOLL
1741 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1742#endif
1743#if EV_USE_POLL
1744 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1745#endif
1746#if EV_USE_SELECT
1747 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1748#endif
1749
1750 for (i = NUMPRI; i--; )
1751 {
1752 array_free (pending, [i]);
1753#if EV_IDLE_ENABLE
1754 array_free (idle, [i]);
1755#endif
1756 }
1757
1758 ev_free (anfds); anfds = 0; anfdmax = 0;
1759
1760 /* have to use the microsoft-never-gets-it-right macro */
1761 array_free (rfeed, EMPTY);
1762 array_free (fdchange, EMPTY);
1763 array_free (timer, EMPTY);
1764#if EV_PERIODIC_ENABLE
1765 array_free (periodic, EMPTY);
1766#endif
1767#if EV_FORK_ENABLE
1768 array_free (fork, EMPTY);
1769#endif
1770 array_free (prepare, EMPTY);
1771 array_free (check, EMPTY);
1772#if EV_ASYNC_ENABLE
1773 array_free (async, EMPTY);
1774#endif
1775
1776 backend = 0;
1777}
1778
1779#if EV_USE_INOTIFY
1780inline_size void infy_fork (EV_P);
1781#endif
1782
1783inline_size void
1784loop_fork (EV_P)
1785{
1786#if EV_USE_PORT
1787 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1788#endif
1789#if EV_USE_KQUEUE
1790 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1791#endif
1792#if EV_USE_EPOLL
1793 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1794#endif
1795#if EV_USE_INOTIFY
1796 infy_fork (EV_A);
1797#endif
1798
1799 if (ev_is_active (&pipe_w))
1800 {
1801 /* this "locks" the handlers against writing to the pipe */
1802 /* while we modify the fd vars */
1803 sig_pending = 1;
1804#if EV_ASYNC_ENABLE
1805 async_pending = 1;
1806#endif
1807
1808 ev_ref (EV_A);
1809 ev_io_stop (EV_A_ &pipe_w);
1810
1811#if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 close (evfd);
1814#endif
1815
1816 if (evpipe [0] >= 0)
1817 {
1818 EV_WIN32_CLOSE_FD (evpipe [0]);
1819 EV_WIN32_CLOSE_FD (evpipe [1]);
1820 }
1821
1822#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 evpipe_init (EV_A);
1824 /* now iterate over everything, in case we missed something */
1825 pipecb (EV_A_ &pipe_w, EV_READ);
1826#endif
1827 }
1828
1829 postfork = 0;
1830}
1831
1832#if EV_MULTIPLICITY
1833
1834struct ev_loop *
1835ev_loop_new (unsigned int flags)
1836{
1837 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1838
1839 memset (EV_A, 0, sizeof (struct ev_loop));
1840 loop_init (EV_A_ flags);
1841
1842 if (ev_backend (EV_A))
1843 return EV_A;
1844
1845 return 0;
1846}
1847
1848void
1849ev_loop_destroy (EV_P)
1850{
1851 loop_destroy (EV_A);
1852 ev_free (loop);
1853}
1854
1855void
1856ev_loop_fork (EV_P)
1857{
1858 postfork = 1; /* must be in line with ev_default_fork */
1859}
1860#endif /* multiplicity */
1861
1862#if EV_VERIFY
1863static void noinline
1864verify_watcher (EV_P_ W w)
1865{
1866 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1867
1868 if (w->pending)
1869 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1870}
1871
1872static void noinline
1873verify_heap (EV_P_ ANHE *heap, int N)
1874{
1875 int i;
1876
1877 for (i = HEAP0; i < N + HEAP0; ++i)
1878 {
1879 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1880 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1881 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1882
1883 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1884 }
1885}
1886
1887static void noinline
1888array_verify (EV_P_ W *ws, int cnt)
1889{
1890 while (cnt--)
1891 {
1892 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1893 verify_watcher (EV_A_ ws [cnt]);
1894 }
1895}
1896#endif
1897
1898#if EV_FEATURE_API
1899void
1900ev_verify (EV_P)
1901{
1902#if EV_VERIFY
1903 int i;
1904 WL w;
1905
1906 assert (activecnt >= -1);
1907
1908 assert (fdchangemax >= fdchangecnt);
1909 for (i = 0; i < fdchangecnt; ++i)
1910 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1911
1912 assert (anfdmax >= 0);
1913 for (i = 0; i < anfdmax; ++i)
1914 for (w = anfds [i].head; w; w = w->next)
456 { 1915 {
457 struct timespec ts; 1916 verify_watcher (EV_A_ (W)w);
458 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1917 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
459 have_monotonic = 1; 1918 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
460 } 1919 }
1920
1921 assert (timermax >= timercnt);
1922 verify_heap (EV_A_ timers, timercnt);
1923
1924#if EV_PERIODIC_ENABLE
1925 assert (periodicmax >= periodiccnt);
1926 verify_heap (EV_A_ periodics, periodiccnt);
1927#endif
1928
1929 for (i = NUMPRI; i--; )
1930 {
1931 assert (pendingmax [i] >= pendingcnt [i]);
1932#if EV_IDLE_ENABLE
1933 assert (idleall >= 0);
1934 assert (idlemax [i] >= idlecnt [i]);
1935 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1936#endif
1937 }
1938
1939#if EV_FORK_ENABLE
1940 assert (forkmax >= forkcnt);
1941 array_verify (EV_A_ (W *)forks, forkcnt);
1942#endif
1943
1944#if EV_ASYNC_ENABLE
1945 assert (asyncmax >= asynccnt);
1946 array_verify (EV_A_ (W *)asyncs, asynccnt);
1947#endif
1948
1949#if EV_PREPARE_ENABLE
1950 assert (preparemax >= preparecnt);
1951 array_verify (EV_A_ (W *)prepares, preparecnt);
1952#endif
1953
1954#if EV_CHECK_ENABLE
1955 assert (checkmax >= checkcnt);
1956 array_verify (EV_A_ (W *)checks, checkcnt);
1957#endif
1958
1959# if 0
1960#if EV_CHILD_ENABLE
1961 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1962 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1963#endif
461#endif 1964# endif
462
463 ev_now = ev_time ();
464 now = get_clock ();
465 diff = ev_now - now;
466
467 if (pipe (sigpipe))
468 return 0;
469
470 ev_method = EVMETHOD_NONE;
471#if EV_USE_EPOLL
472 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
473#endif 1965#endif
474#if EV_USE_SELECT 1966}
475 if (ev_method == EVMETHOD_NONE) select_init (flags);
476#endif 1967#endif
477 1968
478 if (ev_method) 1969#if EV_MULTIPLICITY
1970struct ev_loop *
1971ev_default_loop_init (unsigned int flags)
1972#else
1973int
1974ev_default_loop (unsigned int flags)
1975#endif
1976{
1977 if (!ev_default_loop_ptr)
1978 {
1979#if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr = &default_loop_struct;
1981#else
1982 ev_default_loop_ptr = 1;
1983#endif
1984
1985 loop_init (EV_A_ flags);
1986
1987 if (ev_backend (EV_A))
479 { 1988 {
480 ev_watcher_init (&sigev, sigcb); 1989#if EV_CHILD_ENABLE
481 siginit ();
482
483 ev_signal_init (&childev, childcb, SIGCHLD); 1990 ev_signal_init (&childev, childcb, SIGCHLD);
1991 ev_set_priority (&childev, EV_MAXPRI);
484 ev_signal_start (&childev); 1992 ev_signal_start (EV_A_ &childev);
1993 ev_unref (EV_A); /* child watcher should not keep loop alive */
1994#endif
485 } 1995 }
1996 else
1997 ev_default_loop_ptr = 0;
486 } 1998 }
487 1999
488 return ev_method; 2000 return ev_default_loop_ptr;
2001}
2002
2003void
2004ev_default_destroy (void)
2005{
2006#if EV_MULTIPLICITY
2007 EV_P = ev_default_loop_ptr;
2008#endif
2009
2010 ev_default_loop_ptr = 0;
2011
2012#if EV_CHILD_ENABLE
2013 ev_ref (EV_A); /* child watcher */
2014 ev_signal_stop (EV_A_ &childev);
2015#endif
2016
2017 loop_destroy (EV_A);
2018}
2019
2020void
2021ev_default_fork (void)
2022{
2023#if EV_MULTIPLICITY
2024 EV_P = ev_default_loop_ptr;
2025#endif
2026
2027 postfork = 1; /* must be in line with ev_loop_fork */
489} 2028}
490 2029
491/*****************************************************************************/ 2030/*****************************************************************************/
492 2031
493void 2032void
494ev_fork_prepare (void) 2033ev_invoke (EV_P_ void *w, int revents)
495{ 2034{
496 /* nop */ 2035 EV_CB_INVOKE ((W)w, revents);
497} 2036}
498 2037
499void 2038unsigned int
500ev_fork_parent (void) 2039ev_pending_count (EV_P)
501{ 2040{
502 /* nop */ 2041 int pri;
503} 2042 unsigned int count = 0;
504 2043
505void 2044 for (pri = NUMPRI; pri--; )
506ev_fork_child (void) 2045 count += pendingcnt [pri];
2046
2047 return count;
2048}
2049
2050void noinline
2051ev_invoke_pending (EV_P)
507{ 2052{
508#if EV_USE_EPOLL 2053 int pri;
509 if (ev_method == EVMETHOD_EPOLL) 2054
510 epoll_postfork_child (); 2055 for (pri = NUMPRI; pri--; )
2056 while (pendingcnt [pri])
2057 {
2058 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2059
2060 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2061 /* ^ this is no longer true, as pending_w could be here */
2062
2063 p->w->pending = 0;
2064 EV_CB_INVOKE (p->w, p->events);
2065 EV_FREQUENT_CHECK;
2066 }
2067}
2068
2069#if EV_IDLE_ENABLE
2070/* make idle watchers pending. this handles the "call-idle */
2071/* only when higher priorities are idle" logic */
2072inline_size void
2073idle_reify (EV_P)
2074{
2075 if (expect_false (idleall))
2076 {
2077 int pri;
2078
2079 for (pri = NUMPRI; pri--; )
2080 {
2081 if (pendingcnt [pri])
2082 break;
2083
2084 if (idlecnt [pri])
2085 {
2086 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2087 break;
2088 }
2089 }
2090 }
2091}
2092#endif
2093
2094/* make timers pending */
2095inline_size void
2096timers_reify (EV_P)
2097{
2098 EV_FREQUENT_CHECK;
2099
2100 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2101 {
2102 do
2103 {
2104 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2105
2106 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2107
2108 /* first reschedule or stop timer */
2109 if (w->repeat)
2110 {
2111 ev_at (w) += w->repeat;
2112 if (ev_at (w) < mn_now)
2113 ev_at (w) = mn_now;
2114
2115 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2116
2117 ANHE_at_cache (timers [HEAP0]);
2118 downheap (timers, timercnt, HEAP0);
2119 }
2120 else
2121 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2122
2123 EV_FREQUENT_CHECK;
2124 feed_reverse (EV_A_ (W)w);
2125 }
2126 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2127
2128 feed_reverse_done (EV_A_ EV_TIMER);
2129 }
2130}
2131
2132#if EV_PERIODIC_ENABLE
2133/* make periodics pending */
2134inline_size void
2135periodics_reify (EV_P)
2136{
2137 EV_FREQUENT_CHECK;
2138
2139 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2140 {
2141 int feed_count = 0;
2142
2143 do
2144 {
2145 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2146
2147 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2148
2149 /* first reschedule or stop timer */
2150 if (w->reschedule_cb)
2151 {
2152 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2153
2154 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2155
2156 ANHE_at_cache (periodics [HEAP0]);
2157 downheap (periodics, periodiccnt, HEAP0);
2158 }
2159 else if (w->interval)
2160 {
2161 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2162 /* if next trigger time is not sufficiently in the future, put it there */
2163 /* this might happen because of floating point inexactness */
2164 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2165 {
2166 ev_at (w) += w->interval;
2167
2168 /* if interval is unreasonably low we might still have a time in the past */
2169 /* so correct this. this will make the periodic very inexact, but the user */
2170 /* has effectively asked to get triggered more often than possible */
2171 if (ev_at (w) < ev_rt_now)
2172 ev_at (w) = ev_rt_now;
2173 }
2174
2175 ANHE_at_cache (periodics [HEAP0]);
2176 downheap (periodics, periodiccnt, HEAP0);
2177 }
2178 else
2179 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2180
2181 EV_FREQUENT_CHECK;
2182 feed_reverse (EV_A_ (W)w);
2183 }
2184 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2185
2186 feed_reverse_done (EV_A_ EV_PERIODIC);
2187 }
2188}
2189
2190/* simply recalculate all periodics */
2191/* TODO: maybe ensure that at least one event happens when jumping forward? */
2192static void noinline
2193periodics_reschedule (EV_P)
2194{
2195 int i;
2196
2197 /* adjust periodics after time jump */
2198 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2199 {
2200 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2201
2202 if (w->reschedule_cb)
2203 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2204 else if (w->interval)
2205 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2206
2207 ANHE_at_cache (periodics [i]);
2208 }
2209
2210 reheap (periodics, periodiccnt);
2211}
2212#endif
2213
2214/* adjust all timers by a given offset */
2215static void noinline
2216timers_reschedule (EV_P_ ev_tstamp adjust)
2217{
2218 int i;
2219
2220 for (i = 0; i < timercnt; ++i)
2221 {
2222 ANHE *he = timers + i + HEAP0;
2223 ANHE_w (*he)->at += adjust;
2224 ANHE_at_cache (*he);
2225 }
2226}
2227
2228/* fetch new monotonic and realtime times from the kernel */
2229/* also detect if there was a timejump, and act accordingly */
2230inline_speed void
2231time_update (EV_P_ ev_tstamp max_block)
2232{
2233#if EV_USE_MONOTONIC
2234 if (expect_true (have_monotonic))
2235 {
2236 int i;
2237 ev_tstamp odiff = rtmn_diff;
2238
2239 mn_now = get_clock ();
2240
2241 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2242 /* interpolate in the meantime */
2243 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2244 {
2245 ev_rt_now = rtmn_diff + mn_now;
2246 return;
2247 }
2248
2249 now_floor = mn_now;
2250 ev_rt_now = ev_time ();
2251
2252 /* loop a few times, before making important decisions.
2253 * on the choice of "4": one iteration isn't enough,
2254 * in case we get preempted during the calls to
2255 * ev_time and get_clock. a second call is almost guaranteed
2256 * to succeed in that case, though. and looping a few more times
2257 * doesn't hurt either as we only do this on time-jumps or
2258 * in the unlikely event of having been preempted here.
2259 */
2260 for (i = 4; --i; )
2261 {
2262 rtmn_diff = ev_rt_now - mn_now;
2263
2264 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2265 return; /* all is well */
2266
2267 ev_rt_now = ev_time ();
2268 mn_now = get_clock ();
2269 now_floor = mn_now;
2270 }
2271
2272 /* no timer adjustment, as the monotonic clock doesn't jump */
2273 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2274# if EV_PERIODIC_ENABLE
2275 periodics_reschedule (EV_A);
511#endif 2276# endif
2277 }
2278 else
2279#endif
2280 {
2281 ev_rt_now = ev_time ();
512 2282
513 ev_io_stop (&sigev); 2283 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
514 close (sigpipe [0]); 2284 {
515 close (sigpipe [1]); 2285 /* adjust timers. this is easy, as the offset is the same for all of them */
516 pipe (sigpipe); 2286 timers_reschedule (EV_A_ ev_rt_now - mn_now);
517 siginit (); 2287#if EV_PERIODIC_ENABLE
2288 periodics_reschedule (EV_A);
2289#endif
2290 }
2291
2292 mn_now = ev_rt_now;
2293 }
2294}
2295
2296void
2297ev_loop (EV_P_ int flags)
2298{
2299#if EV_FEATURE_API
2300 ++loop_depth;
2301#endif
2302
2303 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2304
2305 loop_done = EVUNLOOP_CANCEL;
2306
2307 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2308
2309 do
2310 {
2311#if EV_VERIFY >= 2
2312 ev_verify (EV_A);
2313#endif
2314
2315#ifndef _WIN32
2316 if (expect_false (curpid)) /* penalise the forking check even more */
2317 if (expect_false (getpid () != curpid))
2318 {
2319 curpid = getpid ();
2320 postfork = 1;
2321 }
2322#endif
2323
2324#if EV_FORK_ENABLE
2325 /* we might have forked, so queue fork handlers */
2326 if (expect_false (postfork))
2327 if (forkcnt)
2328 {
2329 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2330 EV_INVOKE_PENDING;
2331 }
2332#endif
2333
2334#if EV_PREPARE_ENABLE
2335 /* queue prepare watchers (and execute them) */
2336 if (expect_false (preparecnt))
2337 {
2338 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2339 EV_INVOKE_PENDING;
2340 }
2341#endif
2342
2343 if (expect_false (loop_done))
2344 break;
2345
2346 /* we might have forked, so reify kernel state if necessary */
2347 if (expect_false (postfork))
2348 loop_fork (EV_A);
2349
2350 /* update fd-related kernel structures */
2351 fd_reify (EV_A);
2352
2353 /* calculate blocking time */
2354 {
2355 ev_tstamp waittime = 0.;
2356 ev_tstamp sleeptime = 0.;
2357
2358 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2359 {
2360 /* remember old timestamp for io_blocktime calculation */
2361 ev_tstamp prev_mn_now = mn_now;
2362
2363 /* update time to cancel out callback processing overhead */
2364 time_update (EV_A_ 1e100);
2365
2366 waittime = MAX_BLOCKTIME;
2367
2368 if (timercnt)
2369 {
2370 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2371 if (waittime > to) waittime = to;
2372 }
2373
2374#if EV_PERIODIC_ENABLE
2375 if (periodiccnt)
2376 {
2377 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2378 if (waittime > to) waittime = to;
2379 }
2380#endif
2381
2382 /* don't let timeouts decrease the waittime below timeout_blocktime */
2383 if (expect_false (waittime < timeout_blocktime))
2384 waittime = timeout_blocktime;
2385
2386 /* extra check because io_blocktime is commonly 0 */
2387 if (expect_false (io_blocktime))
2388 {
2389 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2390
2391 if (sleeptime > waittime - backend_fudge)
2392 sleeptime = waittime - backend_fudge;
2393
2394 if (expect_true (sleeptime > 0.))
2395 {
2396 ev_sleep (sleeptime);
2397 waittime -= sleeptime;
2398 }
2399 }
2400 }
2401
2402#if EV_FEATURE_API
2403 ++loop_count;
2404#endif
2405 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2406 backend_poll (EV_A_ waittime);
2407 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2408
2409 /* update ev_rt_now, do magic */
2410 time_update (EV_A_ waittime + sleeptime);
2411 }
2412
2413 /* queue pending timers and reschedule them */
2414 timers_reify (EV_A); /* relative timers called last */
2415#if EV_PERIODIC_ENABLE
2416 periodics_reify (EV_A); /* absolute timers called first */
2417#endif
2418
2419#if EV_IDLE_ENABLE
2420 /* queue idle watchers unless other events are pending */
2421 idle_reify (EV_A);
2422#endif
2423
2424#if EV_CHECK_ENABLE
2425 /* queue check watchers, to be executed first */
2426 if (expect_false (checkcnt))
2427 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2428#endif
2429
2430 EV_INVOKE_PENDING;
2431 }
2432 while (expect_true (
2433 activecnt
2434 && !loop_done
2435 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2436 ));
2437
2438 if (loop_done == EVUNLOOP_ONE)
2439 loop_done = EVUNLOOP_CANCEL;
2440
2441#if EV_FEATURE_API
2442 --loop_depth;
2443#endif
2444}
2445
2446void
2447ev_unloop (EV_P_ int how)
2448{
2449 loop_done = how;
2450}
2451
2452void
2453ev_ref (EV_P)
2454{
2455 ++activecnt;
2456}
2457
2458void
2459ev_unref (EV_P)
2460{
2461 --activecnt;
2462}
2463
2464void
2465ev_now_update (EV_P)
2466{
2467 time_update (EV_A_ 1e100);
2468}
2469
2470void
2471ev_suspend (EV_P)
2472{
2473 ev_now_update (EV_A);
2474}
2475
2476void
2477ev_resume (EV_P)
2478{
2479 ev_tstamp mn_prev = mn_now;
2480
2481 ev_now_update (EV_A);
2482 timers_reschedule (EV_A_ mn_now - mn_prev);
2483#if EV_PERIODIC_ENABLE
2484 /* TODO: really do this? */
2485 periodics_reschedule (EV_A);
2486#endif
518} 2487}
519 2488
520/*****************************************************************************/ 2489/*****************************************************************************/
2490/* singly-linked list management, used when the expected list length is short */
521 2491
522static void 2492inline_size void
523call_pending (void) 2493wlist_add (WL *head, WL elem)
524{ 2494{
525 while (pendingcnt) 2495 elem->next = *head;
526 { 2496 *head = elem;
527 ANPENDING *p = pendings + --pendingcnt; 2497}
528 2498
529 if (p->w) 2499inline_size void
2500wlist_del (WL *head, WL elem)
2501{
2502 while (*head)
2503 {
2504 if (expect_true (*head == elem))
530 { 2505 {
531 p->w->pending = 0; 2506 *head = elem->next;
532 p->w->cb (p->w, p->events); 2507 break;
533 } 2508 }
2509
2510 head = &(*head)->next;
2511 }
2512}
2513
2514/* internal, faster, version of ev_clear_pending */
2515inline_speed void
2516clear_pending (EV_P_ W w)
2517{
2518 if (w->pending)
534 } 2519 {
2520 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2521 w->pending = 0;
2522 }
535} 2523}
536 2524
537static void 2525int
538timers_reify (void) 2526ev_clear_pending (EV_P_ void *w)
539{ 2527{
540 while (timercnt && timers [0]->at <= now) 2528 W w_ = (W)w;
2529 int pending = w_->pending;
2530
2531 if (expect_true (pending))
2532 {
2533 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2534 p->w = (W)&pending_w;
2535 w_->pending = 0;
2536 return p->events;
2537 }
2538 else
2539 return 0;
2540}
2541
2542inline_size void
2543pri_adjust (EV_P_ W w)
2544{
2545 int pri = ev_priority (w);
2546 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2547 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2548 ev_set_priority (w, pri);
2549}
2550
2551inline_speed void
2552ev_start (EV_P_ W w, int active)
2553{
2554 pri_adjust (EV_A_ w);
2555 w->active = active;
2556 ev_ref (EV_A);
2557}
2558
2559inline_size void
2560ev_stop (EV_P_ W w)
2561{
2562 ev_unref (EV_A);
2563 w->active = 0;
2564}
2565
2566/*****************************************************************************/
2567
2568void noinline
2569ev_io_start (EV_P_ ev_io *w)
2570{
2571 int fd = w->fd;
2572
2573 if (expect_false (ev_is_active (w)))
2574 return;
2575
2576 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2577 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2578
2579 EV_FREQUENT_CHECK;
2580
2581 ev_start (EV_A_ (W)w, 1);
2582 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2583 wlist_add (&anfds[fd].head, (WL)w);
2584
2585 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2586 w->events &= ~EV__IOFDSET;
2587
2588 EV_FREQUENT_CHECK;
2589}
2590
2591void noinline
2592ev_io_stop (EV_P_ ev_io *w)
2593{
2594 clear_pending (EV_A_ (W)w);
2595 if (expect_false (!ev_is_active (w)))
2596 return;
2597
2598 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2599
2600 EV_FREQUENT_CHECK;
2601
2602 wlist_del (&anfds[w->fd].head, (WL)w);
2603 ev_stop (EV_A_ (W)w);
2604
2605 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2606
2607 EV_FREQUENT_CHECK;
2608}
2609
2610void noinline
2611ev_timer_start (EV_P_ ev_timer *w)
2612{
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
2616 ev_at (w) += mn_now;
2617
2618 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2619
2620 EV_FREQUENT_CHECK;
2621
2622 ++timercnt;
2623 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2624 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2625 ANHE_w (timers [ev_active (w)]) = (WT)w;
2626 ANHE_at_cache (timers [ev_active (w)]);
2627 upheap (timers, ev_active (w));
2628
2629 EV_FREQUENT_CHECK;
2630
2631 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2632}
2633
2634void noinline
2635ev_timer_stop (EV_P_ ev_timer *w)
2636{
2637 clear_pending (EV_A_ (W)w);
2638 if (expect_false (!ev_is_active (w)))
2639 return;
2640
2641 EV_FREQUENT_CHECK;
2642
2643 {
2644 int active = ev_active (w);
2645
2646 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2647
2648 --timercnt;
2649
2650 if (expect_true (active < timercnt + HEAP0))
541 { 2651 {
542 struct ev_timer *w = timers [0]; 2652 timers [active] = timers [timercnt + HEAP0];
2653 adjustheap (timers, timercnt, active);
2654 }
2655 }
543 2656
544 /* first reschedule or stop timer */ 2657 ev_at (w) -= mn_now;
2658
2659 ev_stop (EV_A_ (W)w);
2660
2661 EV_FREQUENT_CHECK;
2662}
2663
2664void noinline
2665ev_timer_again (EV_P_ ev_timer *w)
2666{
2667 EV_FREQUENT_CHECK;
2668
2669 if (ev_is_active (w))
2670 {
545 if (w->repeat) 2671 if (w->repeat)
546 { 2672 {
547 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548 w->at = now + w->repeat; 2673 ev_at (w) = mn_now + w->repeat;
549 downheap ((WT *)timers, timercnt, 0); 2674 ANHE_at_cache (timers [ev_active (w)]);
2675 adjustheap (timers, timercnt, ev_active (w));
550 } 2676 }
551 else 2677 else
552 ev_timer_stop (w); /* nonrepeating: stop timer */ 2678 ev_timer_stop (EV_A_ w);
553
554 event ((W)w, EV_TIMEOUT);
555 }
556}
557
558static void
559periodics_reify (void)
560{
561 while (periodiccnt && periodics [0]->at <= ev_now)
562 { 2679 }
563 struct ev_periodic *w = periodics [0]; 2680 else if (w->repeat)
2681 {
2682 ev_at (w) = w->repeat;
2683 ev_timer_start (EV_A_ w);
2684 }
564 2685
565 /* first reschedule or stop timer */ 2686 EV_FREQUENT_CHECK;
2687}
2688
2689ev_tstamp
2690ev_timer_remaining (EV_P_ ev_timer *w)
2691{
2692 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2693}
2694
2695#if EV_PERIODIC_ENABLE
2696void noinline
2697ev_periodic_start (EV_P_ ev_periodic *w)
2698{
2699 if (expect_false (ev_is_active (w)))
2700 return;
2701
2702 if (w->reschedule_cb)
2703 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
566 if (w->interval) 2704 else if (w->interval)
2705 {
2706 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2707 /* this formula differs from the one in periodic_reify because we do not always round up */
2708 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2709 }
2710 else
2711 ev_at (w) = w->offset;
2712
2713 EV_FREQUENT_CHECK;
2714
2715 ++periodiccnt;
2716 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2717 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2718 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2719 ANHE_at_cache (periodics [ev_active (w)]);
2720 upheap (periodics, ev_active (w));
2721
2722 EV_FREQUENT_CHECK;
2723
2724 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2725}
2726
2727void noinline
2728ev_periodic_stop (EV_P_ ev_periodic *w)
2729{
2730 clear_pending (EV_A_ (W)w);
2731 if (expect_false (!ev_is_active (w)))
2732 return;
2733
2734 EV_FREQUENT_CHECK;
2735
2736 {
2737 int active = ev_active (w);
2738
2739 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2740
2741 --periodiccnt;
2742
2743 if (expect_true (active < periodiccnt + HEAP0))
2744 {
2745 periodics [active] = periodics [periodiccnt + HEAP0];
2746 adjustheap (periodics, periodiccnt, active);
2747 }
2748 }
2749
2750 ev_stop (EV_A_ (W)w);
2751
2752 EV_FREQUENT_CHECK;
2753}
2754
2755void noinline
2756ev_periodic_again (EV_P_ ev_periodic *w)
2757{
2758 /* TODO: use adjustheap and recalculation */
2759 ev_periodic_stop (EV_A_ w);
2760 ev_periodic_start (EV_A_ w);
2761}
2762#endif
2763
2764#ifndef SA_RESTART
2765# define SA_RESTART 0
2766#endif
2767
2768#if EV_SIGNAL_ENABLE
2769
2770void noinline
2771ev_signal_start (EV_P_ ev_signal *w)
2772{
2773 if (expect_false (ev_is_active (w)))
2774 return;
2775
2776 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2777
2778#if EV_MULTIPLICITY
2779 assert (("libev: a signal must not be attached to two different loops",
2780 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2781
2782 signals [w->signum - 1].loop = EV_A;
2783#endif
2784
2785 EV_FREQUENT_CHECK;
2786
2787#if EV_USE_SIGNALFD
2788 if (sigfd == -2)
2789 {
2790 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2791 if (sigfd < 0 && errno == EINVAL)
2792 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2793
2794 if (sigfd >= 0)
567 { 2795 {
568 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2796 fd_intern (sigfd); /* doing it twice will not hurt */
569 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2797
570 downheap ((WT *)periodics, periodiccnt, 0); 2798 sigemptyset (&sigfd_set);
2799
2800 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2801 ev_set_priority (&sigfd_w, EV_MAXPRI);
2802 ev_io_start (EV_A_ &sigfd_w);
2803 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2804 }
2805 }
2806
2807 if (sigfd >= 0)
2808 {
2809 /* TODO: check .head */
2810 sigaddset (&sigfd_set, w->signum);
2811 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2812
2813 signalfd (sigfd, &sigfd_set, 0);
2814 }
2815#endif
2816
2817 ev_start (EV_A_ (W)w, 1);
2818 wlist_add (&signals [w->signum - 1].head, (WL)w);
2819
2820 if (!((WL)w)->next)
2821# if EV_USE_SIGNALFD
2822 if (sigfd < 0) /*TODO*/
2823# endif
2824 {
2825# ifdef _WIN32
2826 evpipe_init (EV_A);
2827
2828 signal (w->signum, ev_sighandler);
2829# else
2830 struct sigaction sa;
2831
2832 evpipe_init (EV_A);
2833
2834 sa.sa_handler = ev_sighandler;
2835 sigfillset (&sa.sa_mask);
2836 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2837 sigaction (w->signum, &sa, 0);
2838
2839 sigemptyset (&sa.sa_mask);
2840 sigaddset (&sa.sa_mask, w->signum);
2841 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2842#endif
2843 }
2844
2845 EV_FREQUENT_CHECK;
2846}
2847
2848void noinline
2849ev_signal_stop (EV_P_ ev_signal *w)
2850{
2851 clear_pending (EV_A_ (W)w);
2852 if (expect_false (!ev_is_active (w)))
2853 return;
2854
2855 EV_FREQUENT_CHECK;
2856
2857 wlist_del (&signals [w->signum - 1].head, (WL)w);
2858 ev_stop (EV_A_ (W)w);
2859
2860 if (!signals [w->signum - 1].head)
2861 {
2862#if EV_MULTIPLICITY
2863 signals [w->signum - 1].loop = 0; /* unattach from signal */
2864#endif
2865#if EV_USE_SIGNALFD
2866 if (sigfd >= 0)
2867 {
2868 sigset_t ss;
2869
2870 sigemptyset (&ss);
2871 sigaddset (&ss, w->signum);
2872 sigdelset (&sigfd_set, w->signum);
2873
2874 signalfd (sigfd, &sigfd_set, 0);
2875 sigprocmask (SIG_UNBLOCK, &ss, 0);
571 } 2876 }
572 else 2877 else
573 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2878#endif
574 2879 signal (w->signum, SIG_DFL);
575 event ((W)w, EV_PERIODIC);
576 }
577}
578
579static void
580periodics_reschedule (ev_tstamp diff)
581{
582 int i;
583
584 /* adjust periodics after time jump */
585 for (i = 0; i < periodiccnt; ++i)
586 { 2880 }
587 struct ev_periodic *w = periodics [i];
588 2881
589 if (w->interval) 2882 EV_FREQUENT_CHECK;
2883}
2884
2885#endif
2886
2887#if EV_CHILD_ENABLE
2888
2889void
2890ev_child_start (EV_P_ ev_child *w)
2891{
2892#if EV_MULTIPLICITY
2893 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2894#endif
2895 if (expect_false (ev_is_active (w)))
2896 return;
2897
2898 EV_FREQUENT_CHECK;
2899
2900 ev_start (EV_A_ (W)w, 1);
2901 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2902
2903 EV_FREQUENT_CHECK;
2904}
2905
2906void
2907ev_child_stop (EV_P_ ev_child *w)
2908{
2909 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w)))
2911 return;
2912
2913 EV_FREQUENT_CHECK;
2914
2915 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2916 ev_stop (EV_A_ (W)w);
2917
2918 EV_FREQUENT_CHECK;
2919}
2920
2921#endif
2922
2923#if EV_STAT_ENABLE
2924
2925# ifdef _WIN32
2926# undef lstat
2927# define lstat(a,b) _stati64 (a,b)
2928# endif
2929
2930#define DEF_STAT_INTERVAL 5.0074891
2931#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2932#define MIN_STAT_INTERVAL 0.1074891
2933
2934static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2935
2936#if EV_USE_INOTIFY
2937
2938/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2939# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2940
2941static void noinline
2942infy_add (EV_P_ ev_stat *w)
2943{
2944 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);
2945
2946 if (w->wd >= 0)
2947 {
2948 struct statfs sfs;
2949
2950 /* now local changes will be tracked by inotify, but remote changes won't */
2951 /* unless the filesystem is known to be local, we therefore still poll */
2952 /* also do poll on <2.6.25, but with normal frequency */
2953
2954 if (!fs_2625)
2955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2956 else if (!statfs (w->path, &sfs)
2957 && (sfs.f_type == 0x1373 /* devfs */
2958 || sfs.f_type == 0xEF53 /* ext2/3 */
2959 || sfs.f_type == 0x3153464a /* jfs */
2960 || sfs.f_type == 0x52654973 /* reiser3 */
2961 || sfs.f_type == 0x01021994 /* tempfs */
2962 || sfs.f_type == 0x58465342 /* xfs */))
2963 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2964 else
2965 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2966 }
2967 else
2968 {
2969 /* can't use inotify, continue to stat */
2970 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2971
2972 /* if path is not there, monitor some parent directory for speedup hints */
2973 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2974 /* but an efficiency issue only */
2975 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
590 { 2976 {
591 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 2977 char path [4096];
2978 strcpy (path, w->path);
592 2979
593 if (fabs (diff) >= 1e-4) 2980 do
594 { 2981 {
595 ev_periodic_stop (w); 2982 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
596 ev_periodic_start (w); 2983 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
597 2984
598 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 2985 char *pend = strrchr (path, '/');
2986
2987 if (!pend || pend == path)
2988 break;
2989
2990 *pend = 0;
2991 w->wd = inotify_add_watch (fs_fd, path, mask);
2992 }
2993 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2994 }
2995 }
2996
2997 if (w->wd >= 0)
2998 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2999
3000 /* now re-arm timer, if required */
3001 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3002 ev_timer_again (EV_A_ &w->timer);
3003 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3004}
3005
3006static void noinline
3007infy_del (EV_P_ ev_stat *w)
3008{
3009 int slot;
3010 int wd = w->wd;
3011
3012 if (wd < 0)
3013 return;
3014
3015 w->wd = -2;
3016 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3017 wlist_del (&fs_hash [slot].head, (WL)w);
3018
3019 /* remove this watcher, if others are watching it, they will rearm */
3020 inotify_rm_watch (fs_fd, wd);
3021}
3022
3023static void noinline
3024infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3025{
3026 if (slot < 0)
3027 /* overflow, need to check for all hash slots */
3028 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3029 infy_wd (EV_A_ slot, wd, ev);
3030 else
3031 {
3032 WL w_;
3033
3034 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3035 {
3036 ev_stat *w = (ev_stat *)w_;
3037 w_ = w_->next; /* lets us remove this watcher and all before it */
3038
3039 if (w->wd == wd || wd == -1)
3040 {
3041 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3042 {
3043 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3044 w->wd = -1;
3045 infy_add (EV_A_ w); /* re-add, no matter what */
3046 }
3047
3048 stat_timer_cb (EV_A_ &w->timer, 0);
599 } 3049 }
600 } 3050 }
601 } 3051 }
602} 3052}
603 3053
604static void 3054static void
605time_update (void) 3055infy_cb (EV_P_ ev_io *w, int revents)
606{ 3056{
3057 char buf [EV_INOTIFY_BUFSIZE];
3058 int ofs;
3059 int len = read (fs_fd, buf, sizeof (buf));
3060
3061 for (ofs = 0; ofs < len; )
3062 {
3063 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3064 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3065 ofs += sizeof (struct inotify_event) + ev->len;
3066 }
3067}
3068
3069inline_size unsigned int
3070ev_linux_version (void)
3071{
3072 struct utsname buf;
3073 unsigned int v;
607 int i; 3074 int i;
3075 char *p = buf.release;
608 3076
609 ev_now = ev_time (); 3077 if (uname (&buf))
3078 return 0;
610 3079
611 if (have_monotonic) 3080 for (i = 3+1; --i; )
612 { 3081 {
613 ev_tstamp odiff = diff; 3082 unsigned int c = 0;
614 3083
615 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3084 for (;;)
616 { 3085 {
617 now = get_clock (); 3086 if (*p >= '0' && *p <= '9')
618 diff = ev_now - now; 3087 c = c * 10 + *p++ - '0';
619 3088 else
620 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3089 {
621 return; /* all is well */ 3090 p += *p == '.';
622 3091 break;
623 ev_now = ev_time (); 3092 }
624 } 3093 }
625 3094
626 periodics_reschedule (diff - odiff); 3095 v = (v << 8) | c;
627 /* no timer adjustment, as the monotonic clock doesn't jump */ 3096 }
3097
3098 return v;
3099}
3100
3101inline_size void
3102ev_check_2625 (EV_P)
3103{
3104 /* kernels < 2.6.25 are borked
3105 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3106 */
3107 if (ev_linux_version () < 0x020619)
3108 return;
3109
3110 fs_2625 = 1;
3111}
3112
3113inline_size int
3114infy_newfd (void)
3115{
3116#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3117 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3118 if (fd >= 0)
3119 return fd;
3120#endif
3121 return inotify_init ();
3122}
3123
3124inline_size void
3125infy_init (EV_P)
3126{
3127 if (fs_fd != -2)
3128 return;
3129
3130 fs_fd = -1;
3131
3132 ev_check_2625 (EV_A);
3133
3134 fs_fd = infy_newfd ();
3135
3136 if (fs_fd >= 0)
628 } 3137 {
3138 fd_intern (fs_fd);
3139 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3140 ev_set_priority (&fs_w, EV_MAXPRI);
3141 ev_io_start (EV_A_ &fs_w);
3142 ev_unref (EV_A);
3143 }
3144}
3145
3146inline_size void
3147infy_fork (EV_P)
3148{
3149 int slot;
3150
3151 if (fs_fd < 0)
3152 return;
3153
3154 ev_ref (EV_A);
3155 ev_io_stop (EV_A_ &fs_w);
3156 close (fs_fd);
3157 fs_fd = infy_newfd ();
3158
3159 if (fs_fd >= 0)
3160 {
3161 fd_intern (fs_fd);
3162 ev_io_set (&fs_w, fs_fd, EV_READ);
3163 ev_io_start (EV_A_ &fs_w);
3164 ev_unref (EV_A);
3165 }
3166
3167 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3168 {
3169 WL w_ = fs_hash [slot].head;
3170 fs_hash [slot].head = 0;
3171
3172 while (w_)
3173 {
3174 ev_stat *w = (ev_stat *)w_;
3175 w_ = w_->next; /* lets us add this watcher */
3176
3177 w->wd = -1;
3178
3179 if (fs_fd >= 0)
3180 infy_add (EV_A_ w); /* re-add, no matter what */
3181 else
3182 {
3183 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3184 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3185 ev_timer_again (EV_A_ &w->timer);
3186 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3187 }
3188 }
3189 }
3190}
3191
3192#endif
3193
3194#ifdef _WIN32
3195# define EV_LSTAT(p,b) _stati64 (p, b)
3196#else
3197# define EV_LSTAT(p,b) lstat (p, b)
3198#endif
3199
3200void
3201ev_stat_stat (EV_P_ ev_stat *w)
3202{
3203 if (lstat (w->path, &w->attr) < 0)
3204 w->attr.st_nlink = 0;
3205 else if (!w->attr.st_nlink)
3206 w->attr.st_nlink = 1;
3207}
3208
3209static void noinline
3210stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3211{
3212 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3213
3214 ev_statdata prev = w->attr;
3215 ev_stat_stat (EV_A_ w);
3216
3217 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3218 if (
3219 prev.st_dev != w->attr.st_dev
3220 || prev.st_ino != w->attr.st_ino
3221 || prev.st_mode != w->attr.st_mode
3222 || prev.st_nlink != w->attr.st_nlink
3223 || prev.st_uid != w->attr.st_uid
3224 || prev.st_gid != w->attr.st_gid
3225 || prev.st_rdev != w->attr.st_rdev
3226 || prev.st_size != w->attr.st_size
3227 || prev.st_atime != w->attr.st_atime
3228 || prev.st_mtime != w->attr.st_mtime
3229 || prev.st_ctime != w->attr.st_ctime
3230 ) {
3231 /* we only update w->prev on actual differences */
3232 /* in case we test more often than invoke the callback, */
3233 /* to ensure that prev is always different to attr */
3234 w->prev = prev;
3235
3236 #if EV_USE_INOTIFY
3237 if (fs_fd >= 0)
3238 {
3239 infy_del (EV_A_ w);
3240 infy_add (EV_A_ w);
3241 ev_stat_stat (EV_A_ w); /* avoid race... */
3242 }
3243 #endif
3244
3245 ev_feed_event (EV_A_ w, EV_STAT);
3246 }
3247}
3248
3249void
3250ev_stat_start (EV_P_ ev_stat *w)
3251{
3252 if (expect_false (ev_is_active (w)))
3253 return;
3254
3255 ev_stat_stat (EV_A_ w);
3256
3257 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3258 w->interval = MIN_STAT_INTERVAL;
3259
3260 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3261 ev_set_priority (&w->timer, ev_priority (w));
3262
3263#if EV_USE_INOTIFY
3264 infy_init (EV_A);
3265
3266 if (fs_fd >= 0)
3267 infy_add (EV_A_ w);
629 else 3268 else
3269#endif
3270 {
3271 ev_timer_again (EV_A_ &w->timer);
3272 ev_unref (EV_A);
630 { 3273 }
631 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3274
3275 ev_start (EV_A_ (W)w, 1);
3276
3277 EV_FREQUENT_CHECK;
3278}
3279
3280void
3281ev_stat_stop (EV_P_ ev_stat *w)
3282{
3283 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w)))
3285 return;
3286
3287 EV_FREQUENT_CHECK;
3288
3289#if EV_USE_INOTIFY
3290 infy_del (EV_A_ w);
3291#endif
3292
3293 if (ev_is_active (&w->timer))
3294 {
3295 ev_ref (EV_A);
3296 ev_timer_stop (EV_A_ &w->timer);
3297 }
3298
3299 ev_stop (EV_A_ (W)w);
3300
3301 EV_FREQUENT_CHECK;
3302}
3303#endif
3304
3305#if EV_IDLE_ENABLE
3306void
3307ev_idle_start (EV_P_ ev_idle *w)
3308{
3309 if (expect_false (ev_is_active (w)))
3310 return;
3311
3312 pri_adjust (EV_A_ (W)w);
3313
3314 EV_FREQUENT_CHECK;
3315
3316 {
3317 int active = ++idlecnt [ABSPRI (w)];
3318
3319 ++idleall;
3320 ev_start (EV_A_ (W)w, active);
3321
3322 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3323 idles [ABSPRI (w)][active - 1] = w;
3324 }
3325
3326 EV_FREQUENT_CHECK;
3327}
3328
3329void
3330ev_idle_stop (EV_P_ ev_idle *w)
3331{
3332 clear_pending (EV_A_ (W)w);
3333 if (expect_false (!ev_is_active (w)))
3334 return;
3335
3336 EV_FREQUENT_CHECK;
3337
3338 {
3339 int active = ev_active (w);
3340
3341 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3342 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3343
3344 ev_stop (EV_A_ (W)w);
3345 --idleall;
3346 }
3347
3348 EV_FREQUENT_CHECK;
3349}
3350#endif
3351
3352#if EV_PREPARE_ENABLE
3353void
3354ev_prepare_start (EV_P_ ev_prepare *w)
3355{
3356 if (expect_false (ev_is_active (w)))
3357 return;
3358
3359 EV_FREQUENT_CHECK;
3360
3361 ev_start (EV_A_ (W)w, ++preparecnt);
3362 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3363 prepares [preparecnt - 1] = w;
3364
3365 EV_FREQUENT_CHECK;
3366}
3367
3368void
3369ev_prepare_stop (EV_P_ ev_prepare *w)
3370{
3371 clear_pending (EV_A_ (W)w);
3372 if (expect_false (!ev_is_active (w)))
3373 return;
3374
3375 EV_FREQUENT_CHECK;
3376
3377 {
3378 int active = ev_active (w);
3379
3380 prepares [active - 1] = prepares [--preparecnt];
3381 ev_active (prepares [active - 1]) = active;
3382 }
3383
3384 ev_stop (EV_A_ (W)w);
3385
3386 EV_FREQUENT_CHECK;
3387}
3388#endif
3389
3390#if EV_CHECK_ENABLE
3391void
3392ev_check_start (EV_P_ ev_check *w)
3393{
3394 if (expect_false (ev_is_active (w)))
3395 return;
3396
3397 EV_FREQUENT_CHECK;
3398
3399 ev_start (EV_A_ (W)w, ++checkcnt);
3400 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3401 checks [checkcnt - 1] = w;
3402
3403 EV_FREQUENT_CHECK;
3404}
3405
3406void
3407ev_check_stop (EV_P_ ev_check *w)
3408{
3409 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w)))
3411 return;
3412
3413 EV_FREQUENT_CHECK;
3414
3415 {
3416 int active = ev_active (w);
3417
3418 checks [active - 1] = checks [--checkcnt];
3419 ev_active (checks [active - 1]) = active;
3420 }
3421
3422 ev_stop (EV_A_ (W)w);
3423
3424 EV_FREQUENT_CHECK;
3425}
3426#endif
3427
3428#if EV_EMBED_ENABLE
3429void noinline
3430ev_embed_sweep (EV_P_ ev_embed *w)
3431{
3432 ev_loop (w->other, EVLOOP_NONBLOCK);
3433}
3434
3435static void
3436embed_io_cb (EV_P_ ev_io *io, int revents)
3437{
3438 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3439
3440 if (ev_cb (w))
3441 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3442 else
3443 ev_loop (w->other, EVLOOP_NONBLOCK);
3444}
3445
3446static void
3447embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3448{
3449 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3450
3451 {
3452 EV_P = w->other;
3453
3454 while (fdchangecnt)
632 { 3455 {
633 periodics_reschedule (ev_now - now); 3456 fd_reify (EV_A);
634 3457 ev_loop (EV_A_ EVLOOP_NONBLOCK);
635 /* adjust timers. this is easy, as the offset is the same for all */
636 for (i = 0; i < timercnt; ++i)
637 timers [i]->at += diff;
638 } 3458 }
639
640 now = ev_now;
641 } 3459 }
642} 3460}
643 3461
644int ev_loop_done; 3462static void
645 3463embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
646void ev_loop (int flags)
647{ 3464{
648 double block; 3465 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
649 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650 3466
651 do 3467 ev_embed_stop (EV_A_ w);
3468
652 { 3469 {
653 /* queue check watchers (and execute them) */ 3470 EV_P = w->other;
654 if (preparecnt)
655 {
656 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
657 call_pending ();
658 }
659 3471
660 /* update fd-related kernel structures */ 3472 ev_loop_fork (EV_A);
661 fd_reify (); 3473 ev_loop (EV_A_ EVLOOP_NONBLOCK);
662
663 /* calculate blocking time */
664
665 /* we only need this for !monotonic clockor timers, but as we basically
666 always have timers, we just calculate it always */
667 ev_now = ev_time ();
668
669 if (flags & EVLOOP_NONBLOCK || idlecnt)
670 block = 0.;
671 else
672 {
673 block = MAX_BLOCKTIME;
674
675 if (timercnt)
676 {
677 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
678 if (block > to) block = to;
679 }
680
681 if (periodiccnt)
682 {
683 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
684 if (block > to) block = to;
685 }
686
687 if (block < 0.) block = 0.;
688 }
689
690 method_poll (block);
691
692 /* update ev_now, do magic */
693 time_update ();
694
695 /* queue pending timers and reschedule them */
696 timers_reify (); /* relative timers called last */
697 periodics_reify (); /* absolute timers called first */
698
699 /* queue idle watchers unless io or timers are pending */
700 if (!pendingcnt)
701 queue_events ((W *)idles, idlecnt, EV_IDLE);
702
703 /* queue check watchers, to be executed first */
704 if (checkcnt)
705 queue_events ((W *)checks, checkcnt, EV_CHECK);
706
707 call_pending ();
708 } 3474 }
709 while (!ev_loop_done);
710 3475
711 if (ev_loop_done != 2) 3476 ev_embed_start (EV_A_ w);
712 ev_loop_done = 0;
713} 3477}
3478
3479#if 0
3480static void
3481embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3482{
3483 ev_idle_stop (EV_A_ idle);
3484}
3485#endif
3486
3487void
3488ev_embed_start (EV_P_ ev_embed *w)
3489{
3490 if (expect_false (ev_is_active (w)))
3491 return;
3492
3493 {
3494 EV_P = w->other;
3495 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3496 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3497 }
3498
3499 EV_FREQUENT_CHECK;
3500
3501 ev_set_priority (&w->io, ev_priority (w));
3502 ev_io_start (EV_A_ &w->io);
3503
3504 ev_prepare_init (&w->prepare, embed_prepare_cb);
3505 ev_set_priority (&w->prepare, EV_MINPRI);
3506 ev_prepare_start (EV_A_ &w->prepare);
3507
3508 ev_fork_init (&w->fork, embed_fork_cb);
3509 ev_fork_start (EV_A_ &w->fork);
3510
3511 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3512
3513 ev_start (EV_A_ (W)w, 1);
3514
3515 EV_FREQUENT_CHECK;
3516}
3517
3518void
3519ev_embed_stop (EV_P_ ev_embed *w)
3520{
3521 clear_pending (EV_A_ (W)w);
3522 if (expect_false (!ev_is_active (w)))
3523 return;
3524
3525 EV_FREQUENT_CHECK;
3526
3527 ev_io_stop (EV_A_ &w->io);
3528 ev_prepare_stop (EV_A_ &w->prepare);
3529 ev_fork_stop (EV_A_ &w->fork);
3530
3531 ev_stop (EV_A_ (W)w);
3532
3533 EV_FREQUENT_CHECK;
3534}
3535#endif
3536
3537#if EV_FORK_ENABLE
3538void
3539ev_fork_start (EV_P_ ev_fork *w)
3540{
3541 if (expect_false (ev_is_active (w)))
3542 return;
3543
3544 EV_FREQUENT_CHECK;
3545
3546 ev_start (EV_A_ (W)w, ++forkcnt);
3547 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3548 forks [forkcnt - 1] = w;
3549
3550 EV_FREQUENT_CHECK;
3551}
3552
3553void
3554ev_fork_stop (EV_P_ ev_fork *w)
3555{
3556 clear_pending (EV_A_ (W)w);
3557 if (expect_false (!ev_is_active (w)))
3558 return;
3559
3560 EV_FREQUENT_CHECK;
3561
3562 {
3563 int active = ev_active (w);
3564
3565 forks [active - 1] = forks [--forkcnt];
3566 ev_active (forks [active - 1]) = active;
3567 }
3568
3569 ev_stop (EV_A_ (W)w);
3570
3571 EV_FREQUENT_CHECK;
3572}
3573#endif
3574
3575#if EV_ASYNC_ENABLE
3576void
3577ev_async_start (EV_P_ ev_async *w)
3578{
3579 if (expect_false (ev_is_active (w)))
3580 return;
3581
3582 w->sent = 0;
3583
3584 evpipe_init (EV_A);
3585
3586 EV_FREQUENT_CHECK;
3587
3588 ev_start (EV_A_ (W)w, ++asynccnt);
3589 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3590 asyncs [asynccnt - 1] = w;
3591
3592 EV_FREQUENT_CHECK;
3593}
3594
3595void
3596ev_async_stop (EV_P_ ev_async *w)
3597{
3598 clear_pending (EV_A_ (W)w);
3599 if (expect_false (!ev_is_active (w)))
3600 return;
3601
3602 EV_FREQUENT_CHECK;
3603
3604 {
3605 int active = ev_active (w);
3606
3607 asyncs [active - 1] = asyncs [--asynccnt];
3608 ev_active (asyncs [active - 1]) = active;
3609 }
3610
3611 ev_stop (EV_A_ (W)w);
3612
3613 EV_FREQUENT_CHECK;
3614}
3615
3616void
3617ev_async_send (EV_P_ ev_async *w)
3618{
3619 w->sent = 1;
3620 evpipe_write (EV_A_ &async_pending);
3621}
3622#endif
714 3623
715/*****************************************************************************/ 3624/*****************************************************************************/
716 3625
717static void
718wlist_add (WL *head, WL elem)
719{
720 elem->next = *head;
721 *head = elem;
722}
723
724static void
725wlist_del (WL *head, WL elem)
726{
727 while (*head)
728 {
729 if (*head == elem)
730 {
731 *head = elem->next;
732 return;
733 }
734
735 head = &(*head)->next;
736 }
737}
738
739static void
740ev_clear_pending (W w)
741{
742 if (w->pending)
743 {
744 pendings [w->pending - 1].w = 0;
745 w->pending = 0;
746 }
747}
748
749static void
750ev_start (W w, int active)
751{
752 w->active = active;
753}
754
755static void
756ev_stop (W w)
757{
758 w->active = 0;
759}
760
761/*****************************************************************************/
762
763void
764ev_io_start (struct ev_io *w)
765{
766 if (ev_is_active (w))
767 return;
768
769 int fd = w->fd;
770
771 assert (("ev_io_start called with negative fd", fd >= 0));
772
773 ev_start ((W)w, 1);
774 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775 wlist_add ((WL *)&anfds[fd].head, (WL)w);
776
777 fd_change (fd);
778}
779
780void
781ev_io_stop (struct ev_io *w)
782{
783 ev_clear_pending ((W)w);
784 if (!ev_is_active (w))
785 return;
786
787 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788 ev_stop ((W)w);
789
790 fd_change (w->fd);
791}
792
793void
794ev_timer_start (struct ev_timer *w)
795{
796 if (ev_is_active (w))
797 return;
798
799 w->at += now;
800
801 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802
803 ev_start ((W)w, ++timercnt);
804 array_needsize (timers, timermax, timercnt, );
805 timers [timercnt - 1] = w;
806 upheap ((WT *)timers, timercnt - 1);
807}
808
809void
810ev_timer_stop (struct ev_timer *w)
811{
812 ev_clear_pending ((W)w);
813 if (!ev_is_active (w))
814 return;
815
816 if (w->active < timercnt--)
817 {
818 timers [w->active - 1] = timers [timercnt];
819 downheap ((WT *)timers, timercnt, w->active - 1);
820 }
821
822 w->at = w->repeat;
823
824 ev_stop ((W)w);
825}
826
827void
828ev_timer_again (struct ev_timer *w)
829{
830 if (ev_is_active (w))
831 {
832 if (w->repeat)
833 {
834 w->at = now + w->repeat;
835 downheap ((WT *)timers, timercnt, w->active - 1);
836 }
837 else
838 ev_timer_stop (w);
839 }
840 else if (w->repeat)
841 ev_timer_start (w);
842}
843
844void
845ev_periodic_start (struct ev_periodic *w)
846{
847 if (ev_is_active (w))
848 return;
849
850 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852 /* this formula differs from the one in periodic_reify because we do not always round up */
853 if (w->interval)
854 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
855
856 ev_start ((W)w, ++periodiccnt);
857 array_needsize (periodics, periodicmax, periodiccnt, );
858 periodics [periodiccnt - 1] = w;
859 upheap ((WT *)periodics, periodiccnt - 1);
860}
861
862void
863ev_periodic_stop (struct ev_periodic *w)
864{
865 ev_clear_pending ((W)w);
866 if (!ev_is_active (w))
867 return;
868
869 if (w->active < periodiccnt--)
870 {
871 periodics [w->active - 1] = periodics [periodiccnt];
872 downheap ((WT *)periodics, periodiccnt, w->active - 1);
873 }
874
875 ev_stop ((W)w);
876}
877
878void
879ev_signal_start (struct ev_signal *w)
880{
881 if (ev_is_active (w))
882 return;
883
884 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885
886 ev_start ((W)w, 1);
887 array_needsize (signals, signalmax, w->signum, signals_init);
888 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889
890 if (!w->next)
891 {
892 struct sigaction sa;
893 sa.sa_handler = sighandler;
894 sigfillset (&sa.sa_mask);
895 sa.sa_flags = 0;
896 sigaction (w->signum, &sa, 0);
897 }
898}
899
900void
901ev_signal_stop (struct ev_signal *w)
902{
903 ev_clear_pending ((W)w);
904 if (!ev_is_active (w))
905 return;
906
907 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908 ev_stop ((W)w);
909
910 if (!signals [w->signum - 1].head)
911 signal (w->signum, SIG_DFL);
912}
913
914void
915ev_idle_start (struct ev_idle *w)
916{
917 if (ev_is_active (w))
918 return;
919
920 ev_start ((W)w, ++idlecnt);
921 array_needsize (idles, idlemax, idlecnt, );
922 idles [idlecnt - 1] = w;
923}
924
925void
926ev_idle_stop (struct ev_idle *w)
927{
928 ev_clear_pending ((W)w);
929 if (ev_is_active (w))
930 return;
931
932 idles [w->active - 1] = idles [--idlecnt];
933 ev_stop ((W)w);
934}
935
936void
937ev_prepare_start (struct ev_prepare *w)
938{
939 if (ev_is_active (w))
940 return;
941
942 ev_start ((W)w, ++preparecnt);
943 array_needsize (prepares, preparemax, preparecnt, );
944 prepares [preparecnt - 1] = w;
945}
946
947void
948ev_prepare_stop (struct ev_prepare *w)
949{
950 ev_clear_pending ((W)w);
951 if (ev_is_active (w))
952 return;
953
954 prepares [w->active - 1] = prepares [--preparecnt];
955 ev_stop ((W)w);
956}
957
958void
959ev_check_start (struct ev_check *w)
960{
961 if (ev_is_active (w))
962 return;
963
964 ev_start ((W)w, ++checkcnt);
965 array_needsize (checks, checkmax, checkcnt, );
966 checks [checkcnt - 1] = w;
967}
968
969void
970ev_check_stop (struct ev_check *w)
971{
972 ev_clear_pending ((W)w);
973 if (ev_is_active (w))
974 return;
975
976 checks [w->active - 1] = checks [--checkcnt];
977 ev_stop ((W)w);
978}
979
980void
981ev_child_start (struct ev_child *w)
982{
983 if (ev_is_active (w))
984 return;
985
986 ev_start ((W)w, 1);
987 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988}
989
990void
991ev_child_stop (struct ev_child *w)
992{
993 ev_clear_pending ((W)w);
994 if (ev_is_active (w))
995 return;
996
997 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998 ev_stop ((W)w);
999}
1000
1001/*****************************************************************************/
1002
1003struct ev_once 3626struct ev_once
1004{ 3627{
1005 struct ev_io io; 3628 ev_io io;
1006 struct ev_timer to; 3629 ev_timer to;
1007 void (*cb)(int revents, void *arg); 3630 void (*cb)(int revents, void *arg);
1008 void *arg; 3631 void *arg;
1009}; 3632};
1010 3633
1011static void 3634static void
1012once_cb (struct ev_once *once, int revents) 3635once_cb (EV_P_ struct ev_once *once, int revents)
1013{ 3636{
1014 void (*cb)(int revents, void *arg) = once->cb; 3637 void (*cb)(int revents, void *arg) = once->cb;
1015 void *arg = once->arg; 3638 void *arg = once->arg;
1016 3639
1017 ev_io_stop (&once->io); 3640 ev_io_stop (EV_A_ &once->io);
1018 ev_timer_stop (&once->to); 3641 ev_timer_stop (EV_A_ &once->to);
1019 free (once); 3642 ev_free (once);
1020 3643
1021 cb (revents, arg); 3644 cb (revents, arg);
1022} 3645}
1023 3646
1024static void 3647static void
1025once_cb_io (struct ev_io *w, int revents) 3648once_cb_io (EV_P_ ev_io *w, int revents)
1026{ 3649{
1027 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3650 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3651
3652 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1028} 3653}
1029 3654
1030static void 3655static void
1031once_cb_to (struct ev_timer *w, int revents) 3656once_cb_to (EV_P_ ev_timer *w, int revents)
1032{ 3657{
1033 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3658 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1034}
1035 3659
3660 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3661}
3662
1036void 3663void
1037ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3664ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038{ 3665{
1039 struct ev_once *once = malloc (sizeof (struct ev_once)); 3666 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040 3667
1041 if (!once) 3668 if (expect_false (!once))
3669 {
1042 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3670 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1043 else 3671 return;
1044 { 3672 }
3673
1045 once->cb = cb; 3674 once->cb = cb;
1046 once->arg = arg; 3675 once->arg = arg;
1047 3676
1048 ev_watcher_init (&once->io, once_cb_io); 3677 ev_init (&once->io, once_cb_io);
1049 if (fd >= 0) 3678 if (fd >= 0)
3679 {
3680 ev_io_set (&once->io, fd, events);
3681 ev_io_start (EV_A_ &once->io);
3682 }
3683
3684 ev_init (&once->to, once_cb_to);
3685 if (timeout >= 0.)
3686 {
3687 ev_timer_set (&once->to, timeout, 0.);
3688 ev_timer_start (EV_A_ &once->to);
3689 }
3690}
3691
3692/*****************************************************************************/
3693
3694#if EV_WALK_ENABLE
3695void
3696ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3697{
3698 int i, j;
3699 ev_watcher_list *wl, *wn;
3700
3701 if (types & (EV_IO | EV_EMBED))
3702 for (i = 0; i < anfdmax; ++i)
3703 for (wl = anfds [i].head; wl; )
1050 { 3704 {
1051 ev_io_set (&once->io, fd, events); 3705 wn = wl->next;
1052 ev_io_start (&once->io); 3706
3707#if EV_EMBED_ENABLE
3708 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3709 {
3710 if (types & EV_EMBED)
3711 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3712 }
3713 else
3714#endif
3715#if EV_USE_INOTIFY
3716 if (ev_cb ((ev_io *)wl) == infy_cb)
3717 ;
3718 else
3719#endif
3720 if ((ev_io *)wl != &pipe_w)
3721 if (types & EV_IO)
3722 cb (EV_A_ EV_IO, wl);
3723
3724 wl = wn;
1053 } 3725 }
1054 3726
1055 ev_watcher_init (&once->to, once_cb_to); 3727 if (types & (EV_TIMER | EV_STAT))
1056 if (timeout >= 0.) 3728 for (i = timercnt + HEAP0; i-- > HEAP0; )
3729#if EV_STAT_ENABLE
3730 /*TODO: timer is not always active*/
3731 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1057 { 3732 {
1058 ev_timer_set (&once->to, timeout, 0.); 3733 if (types & EV_STAT)
1059 ev_timer_start (&once->to); 3734 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1060 } 3735 }
1061 } 3736 else
1062} 3737#endif
3738 if (types & EV_TIMER)
3739 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1063 3740
1064/*****************************************************************************/ 3741#if EV_PERIODIC_ENABLE
3742 if (types & EV_PERIODIC)
3743 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3744 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3745#endif
1065 3746
1066#if 0 3747#if EV_IDLE_ENABLE
3748 if (types & EV_IDLE)
3749 for (j = NUMPRI; i--; )
3750 for (i = idlecnt [j]; i--; )
3751 cb (EV_A_ EV_IDLE, idles [j][i]);
3752#endif
1067 3753
1068struct ev_io wio; 3754#if EV_FORK_ENABLE
3755 if (types & EV_FORK)
3756 for (i = forkcnt; i--; )
3757 if (ev_cb (forks [i]) != embed_fork_cb)
3758 cb (EV_A_ EV_FORK, forks [i]);
3759#endif
1069 3760
1070static void 3761#if EV_ASYNC_ENABLE
1071sin_cb (struct ev_io *w, int revents) 3762 if (types & EV_ASYNC)
1072{ 3763 for (i = asynccnt; i--; )
1073 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3764 cb (EV_A_ EV_ASYNC, asyncs [i]);
1074} 3765#endif
1075 3766
1076static void 3767#if EV_PREPARE_ENABLE
1077ocb (struct ev_timer *w, int revents) 3768 if (types & EV_PREPARE)
1078{ 3769 for (i = preparecnt; i--; )
1079 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3770# if EV_EMBED_ENABLE
1080 ev_timer_stop (w); 3771 if (ev_cb (prepares [i]) != embed_prepare_cb)
1081 ev_timer_start (w);
1082}
1083
1084static void
1085scb (struct ev_signal *w, int revents)
1086{
1087 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088 ev_io_stop (&wio);
1089 ev_io_start (&wio);
1090}
1091
1092static void
1093gcb (struct ev_signal *w, int revents)
1094{
1095 fprintf (stderr, "generic %x\n", revents);
1096
1097}
1098
1099int main (void)
1100{
1101 ev_init (0);
1102
1103 ev_io_init (&wio, sin_cb, 0, EV_READ);
1104 ev_io_start (&wio);
1105
1106 struct ev_timer t[10000];
1107
1108#if 0
1109 int i;
1110 for (i = 0; i < 10000; ++i)
1111 {
1112 struct ev_timer *w = t + i;
1113 ev_watcher_init (w, ocb, i);
1114 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115 ev_timer_start (w);
1116 if (drand48 () < 0.5)
1117 ev_timer_stop (w);
1118 }
1119#endif 3772# endif
1120 3773 cb (EV_A_ EV_PREPARE, prepares [i]);
1121 struct ev_timer t1;
1122 ev_timer_init (&t1, ocb, 5, 10);
1123 ev_timer_start (&t1);
1124
1125 struct ev_signal sig;
1126 ev_signal_init (&sig, scb, SIGQUIT);
1127 ev_signal_start (&sig);
1128
1129 struct ev_check cw;
1130 ev_check_init (&cw, gcb);
1131 ev_check_start (&cw);
1132
1133 struct ev_idle iw;
1134 ev_idle_init (&iw, gcb);
1135 ev_idle_start (&iw);
1136
1137 ev_loop (0);
1138
1139 return 0;
1140}
1141
1142#endif 3774#endif
1143 3775
3776#if EV_CHECK_ENABLE
3777 if (types & EV_CHECK)
3778 for (i = checkcnt; i--; )
3779 cb (EV_A_ EV_CHECK, checks [i]);
3780#endif
1144 3781
3782#if EV_SIGNAL_ENABLE
3783 if (types & EV_SIGNAL)
3784 for (i = 0; i < EV_NSIG - 1; ++i)
3785 for (wl = signals [i].head; wl; )
3786 {
3787 wn = wl->next;
3788 cb (EV_A_ EV_SIGNAL, wl);
3789 wl = wn;
3790 }
3791#endif
1145 3792
3793#if EV_CHILD_ENABLE
3794 if (types & EV_CHILD)
3795 for (i = (EV_PID_HASHSIZE); i--; )
3796 for (wl = childs [i]; wl; )
3797 {
3798 wn = wl->next;
3799 cb (EV_A_ EV_CHILD, wl);
3800 wl = wn;
3801 }
3802#endif
3803/* EV_STAT 0x00001000 /* stat data changed */
3804/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3805}
3806#endif
1146 3807
3808#if EV_MULTIPLICITY
3809 #include "ev_wrap.h"
3810#endif
3811
3812#ifdef __cplusplus
3813}
3814#endif
3815

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