ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.25 by root, Wed Oct 31 21:34:45 2007 UTC vs.
Revision 1.348 by root, Fri Oct 15 22:48:25 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
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
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
163#endif
29 164
30#include <math.h> 165#include <math.h>
31#include <stdlib.h> 166#include <stdlib.h>
32#include <unistd.h> 167#include <string.h>
33#include <fcntl.h> 168#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 169#include <stddef.h>
36 170
37#include <stdio.h> 171#include <stdio.h>
38 172
39#include <assert.h> 173#include <assert.h>
40#include <errno.h> 174#include <errno.h>
41#include <sys/types.h> 175#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 176#include <time.h>
177#include <limits.h>
45 178
46#ifndef HAVE_MONOTONIC 179#include <signal.h>
47# ifdef CLOCK_MONOTONIC 180
48# define HAVE_MONOTONIC 1 181#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
49# endif 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
50#endif 244# endif
245#endif
51 246
52#ifndef HAVE_SELECT 247#ifndef EV_USE_MONOTONIC
53# define HAVE_SELECT 1 248# 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
54#endif 252# endif
253#endif
55 254
56#ifndef HAVE_EPOLL 255#ifndef EV_USE_REALTIME
57# define HAVE_EPOLL 0 256# 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
58#endif 264# endif
265#endif
59 266
60#ifndef HAVE_REALTIME 267#ifndef EV_USE_SELECT
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 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
62#endif 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
352# define EV_USE_MONOTONIC 1
353# else
354# undef EV_USE_CLOCK_SYSCALL
355# define EV_USE_CLOCK_SYSCALL 0
356# endif
357#endif
358
359/* this block fixes any misconfiguration where we know we run into trouble otherwise */
360
361#ifdef _AIX
362/* AIX has a completely broken poll.h header */
363# undef EV_USE_POLL
364# define EV_USE_POLL 0
365#endif
366
367#ifndef CLOCK_MONOTONIC
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 0
370#endif
371
372#ifndef CLOCK_REALTIME
373# undef EV_USE_REALTIME
374# define EV_USE_REALTIME 0
375#endif
376
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>
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 */
63 470
64#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) */
65#define MAX_BLOCKTIME 60. 472#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
67 473
68#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)
69 476
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
70typedef struct ev_watcher *W; 509typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 510typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 511typedef ev_watcher_time *WT;
73 512
74static ev_tstamp now, diff; /* monotonic clock */ 513#define ev_active(w) ((W)(w))->active
75ev_tstamp ev_now; 514#define ev_at(w) ((WT)(w))->at
76int ev_method;
77 515
78static 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
79 521
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 522#if EV_USE_MONOTONIC
81static void (*method_modify)(int fd, int oev, int nev); 523static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82static 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
83 539
84/*****************************************************************************/ 540/*****************************************************************************/
85 541
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
86ev_tstamp 727ev_tstamp
87ev_time (void) 728ev_time (void)
88{ 729{
89#if HAVE_REALTIME 730#if EV_USE_REALTIME
731 if (expect_true (have_realtime))
732 {
90 struct timespec ts; 733 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 734 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 735 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 736 }
737#endif
738
94 struct timeval tv; 739 struct timeval tv;
95 gettimeofday (&tv, 0); 740 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 741 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif
98} 742}
743#endif
99 744
100static ev_tstamp 745inline_size ev_tstamp
101get_clock (void) 746get_clock (void)
102{ 747{
103#if HAVE_MONOTONIC 748#if EV_USE_MONOTONIC
104 if (have_monotonic) 749 if (expect_true (have_monotonic))
105 { 750 {
106 struct timespec ts; 751 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 752 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 753 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 754 }
110#endif 755#endif
111 756
112 return ev_time (); 757 return ev_time ();
113} 758}
114 759
115#define array_needsize(base,cur,cnt,init) \ 760#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 761ev_tstamp
117 { \ 762ev_now (EV_P)
118 int newcnt = cur; \ 763{
119 do \ 764 return ev_rt_now;
120 { \ 765}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 766#endif
122 } \ 767
123 while ((cnt) > newcnt); \ 768void
124 \ 769ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 770{
126 init (base + cur, newcnt - cur); \ 771 if (delay > 0.)
127 cur = newcnt; \
128 } 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_TS_SET (tv, delay);
787 select (0, 0, 0, 0, &tv);
788#endif
789 }
790}
129 791
130/*****************************************************************************/ 792/*****************************************************************************/
131 793
794#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
795
796/* find a suitable new size for the given array, */
797/* hopefully by rounding to a nice-to-malloc size */
798inline_size int
799array_nextsize (int elem, int cur, int cnt)
800{
801 int ncur = cur + 1;
802
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)
809 {
810 ncur *= elem;
811 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
812 ncur = ncur - sizeof (void *) * 4;
813 ncur /= elem;
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_;
872 pendings [pri][w_->pending - 1].events = revents;
873 }
874}
875
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
892queue_events (EV_P_ W *events, int eventcnt, int type)
893{
894 int i;
895
896 for (i = 0; i < eventcnt; ++i)
897 ev_feed_event (EV_A_ events [i], type);
898}
899
900/*****************************************************************************/
901
902inline_speed void
903fd_event_nocheck (EV_P_ int fd, int revents)
904{
905 ANFD *anfd = anfds + fd;
906 ev_io *w;
907
908 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
909 {
910 int ev = w->events & revents;
911
912 if (ev)
913 ev_feed_event (EV_A_ (W)w, ev);
914 }
915}
916
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;
923
924 if (expect_true (!anfd->reify))
925 fd_event_nocheck (EV_A_ fd, revents);
926}
927
928void
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)
939{
940 int i;
941
942 for (i = 0; i < fdchangecnt; ++i)
943 {
944 int fd = fdchanges [i];
945 ANFD *anfd = anfds + fd;
946 ev_io *w;
947
948 unsigned char events = 0;
949
950 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
951 events |= (unsigned char)w->events;
952
953#if EV_SELECT_IS_WINSOCKET
954 if (events)
955 {
956 unsigned long arg;
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));
959 }
960#endif
961
962 {
963 unsigned char o_events = anfd->events;
964 unsigned char o_reify = anfd->reify;
965
966 anfd->reify = 0;
967 anfd->events = events;
968
969 if (o_events != events || o_reify & EV__IOFDSET)
970 backend_modify (EV_A_ fd, o_events, events);
971 }
972 }
973
974 fdchangecnt = 0;
975}
976
977/* something about the given fd changed */
978inline_size void
979fd_change (EV_P_ int fd, int flags)
980{
981 unsigned char reify = anfds [fd].reify;
982 anfds [fd].reify |= flags;
983
984 if (expect_true (!reify))
985 {
986 ++fdchangecnt;
987 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
988 fdchanges [fdchangecnt - 1] = fd;
989 }
990}
991
992/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
993inline_speed void
994fd_kill (EV_P_ int fd)
995{
996 ev_io *w;
997
998 while ((w = (ev_io *)anfds [fd].head))
999 {
1000 ev_io_stop (EV_A_ w);
1001 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1002 }
1003}
1004
1005/* check whether the given fd is actually valid, for error recovery */
1006inline_size int
1007fd_valid (int fd)
1008{
1009#ifdef _WIN32
1010 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1011#else
1012 return fcntl (fd, F_GETFD) != -1;
1013#endif
1014}
1015
1016/* called on EBADF to verify fds */
1017static void noinline
1018fd_ebadf (EV_P)
1019{
1020 int fd;
1021
1022 for (fd = 0; fd < anfdmax; ++fd)
1023 if (anfds [fd].events)
1024 if (!fd_valid (fd) && errno == EBADF)
1025 fd_kill (EV_A_ fd);
1026}
1027
1028/* called on ENOMEM in select/poll to kill some fds and retry */
1029static void noinline
1030fd_enomem (EV_P)
1031{
1032 int fd;
1033
1034 for (fd = anfdmax; fd--; )
1035 if (anfds [fd].events)
1036 {
1037 fd_kill (EV_A_ fd);
1038 break;
1039 }
1040}
1041
1042/* usually called after fork if backend needs to re-arm all fds from scratch */
1043static void noinline
1044fd_rearm_all (EV_P)
1045{
1046 int fd;
1047
1048 for (fd = 0; fd < anfdmax; ++fd)
1049 if (anfds [fd].events)
1050 {
1051 anfds [fd].events = 0;
1052 anfds [fd].emask = 0;
1053 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1054 }
1055}
1056
1057/* used to prepare libev internal fd's */
1058/* this is not fork-safe */
1059inline_speed void
1060fd_intern (int fd)
1061{
1062#ifdef _WIN32
1063 unsigned long arg = 1;
1064 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1065#else
1066 fcntl (fd, F_SETFD, FD_CLOEXEC);
1067 fcntl (fd, F_SETFL, O_NONBLOCK);
1068#endif
1069}
1070
1071/*****************************************************************************/
1072
1073/*
1074 * the heap functions want a real array index. array index 0 is guaranteed to not
1075 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1076 * the branching factor of the d-tree.
1077 */
1078
1079/*
1080 * at the moment we allow libev the luxury of two heaps,
1081 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1082 * which is more cache-efficient.
1083 * the difference is about 5% with 50000+ watchers.
1084 */
1085#if EV_USE_4HEAP
1086
1087#define DHEAP 4
1088#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1089#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1090#define UPHEAP_DONE(p,k) ((p) == (k))
1091
1092/* away from the root */
1093inline_speed void
1094downheap (ANHE *heap, int N, int k)
1095{
1096 ANHE he = heap [k];
1097 ANHE *E = heap + N + HEAP0;
1098
1099 for (;;)
1100 {
1101 ev_tstamp minat;
1102 ANHE *minpos;
1103 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1104
1105 /* find minimum child */
1106 if (expect_true (pos + DHEAP - 1 < E))
1107 {
1108 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1109 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1110 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1111 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1112 }
1113 else if (pos < E)
1114 {
1115 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1116 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1117 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1118 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1119 }
1120 else
1121 break;
1122
1123 if (ANHE_at (he) <= minat)
1124 break;
1125
1126 heap [k] = *minpos;
1127 ev_active (ANHE_w (*minpos)) = k;
1128
1129 k = minpos - heap;
1130 }
1131
1132 heap [k] = he;
1133 ev_active (ANHE_w (he)) = k;
1134}
1135
1136#else /* 4HEAP */
1137
1138#define HEAP0 1
1139#define HPARENT(k) ((k) >> 1)
1140#define UPHEAP_DONE(p,k) (!(p))
1141
1142/* away from the root */
1143inline_speed void
1144downheap (ANHE *heap, int N, int k)
1145{
1146 ANHE he = heap [k];
1147
1148 for (;;)
1149 {
1150 int c = k << 1;
1151
1152 if (c >= N + HEAP0)
1153 break;
1154
1155 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1156 ? 1 : 0;
1157
1158 if (ANHE_at (he) <= ANHE_at (heap [c]))
1159 break;
1160
1161 heap [k] = heap [c];
1162 ev_active (ANHE_w (heap [k])) = k;
1163
1164 k = c;
1165 }
1166
1167 heap [k] = he;
1168 ev_active (ANHE_w (he)) = k;
1169}
1170#endif
1171
1172/* towards the root */
1173inline_speed void
1174upheap (ANHE *heap, int k)
1175{
1176 ANHE he = heap [k];
1177
1178 for (;;)
1179 {
1180 int p = HPARENT (k);
1181
1182 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1183 break;
1184
1185 heap [k] = heap [p];
1186 ev_active (ANHE_w (heap [k])) = k;
1187 k = p;
1188 }
1189
1190 heap [k] = he;
1191 ev_active (ANHE_w (he)) = k;
1192}
1193
1194/* move an element suitably so it is in a correct place */
1195inline_size void
1196adjustheap (ANHE *heap, int N, int k)
1197{
1198 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1199 upheap (heap, k);
1200 else
1201 downheap (heap, N, k);
1202}
1203
1204/* rebuild the heap: this function is used only once and executed rarely */
1205inline_size void
1206reheap (ANHE *heap, int N)
1207{
1208 int i;
1209
1210 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1211 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1212 for (i = 0; i < N; ++i)
1213 upheap (heap, i + HEAP0);
1214}
1215
1216/*****************************************************************************/
1217
1218/* associate signal watchers to a signal signal */
132typedef struct 1219typedef struct
133{ 1220{
134 struct ev_io *head; 1221 EV_ATOMIC_T pending;
135 unsigned char wev, rev; /* want, received event set */ 1222#if EV_MULTIPLICITY
136} ANFD; 1223 EV_P;
1224#endif
1225 WL head;
1226} ANSIG;
137 1227
138static ANFD *anfds; 1228static ANSIG signals [EV_NSIG - 1];
139static int anfdmax;
140 1229
141static int *fdchanges; 1230/*****************************************************************************/
142static int fdchangemax, fdchangecnt;
143 1231
1232#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1233
1234static void noinline
1235evpipe_init (EV_P)
1236{
1237 if (!ev_is_active (&pipe_w))
1238 {
1239# if EV_USE_EVENTFD
1240 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1241 if (evfd < 0 && errno == EINVAL)
1242 evfd = eventfd (0, 0);
1243
1244 if (evfd >= 0)
1245 {
1246 evpipe [0] = -1;
1247 fd_intern (evfd); /* doing it twice doesn't hurt */
1248 ev_io_set (&pipe_w, evfd, EV_READ);
1249 }
1250 else
1251# endif
1252 {
1253 while (pipe (evpipe))
1254 ev_syserr ("(libev) error creating signal/async pipe");
1255
1256 fd_intern (evpipe [0]);
1257 fd_intern (evpipe [1]);
1258 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1259 }
1260
1261 ev_io_start (EV_A_ &pipe_w);
1262 ev_unref (EV_A); /* watcher should not keep loop alive */
1263 }
1264}
1265
1266inline_size void
1267evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1268{
1269 if (!*flag)
1270 {
1271 int old_errno = errno; /* save errno because write might clobber it */
1272 char dummy;
1273
1274 *flag = 1;
1275
1276#if EV_USE_EVENTFD
1277 if (evfd >= 0)
1278 {
1279 uint64_t counter = 1;
1280 write (evfd, &counter, sizeof (uint64_t));
1281 }
1282 else
1283#endif
1284 /* win32 people keep sending patches that change this write() to send() */
1285 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1286 /* so when you think this write should be a send instead, please find out */
1287 /* where your send() is from - it's definitely not the microsoft send, and */
1288 /* tell me. thank you. */
1289 write (evpipe [1], &dummy, 1);
1290
1291 errno = old_errno;
1292 }
1293}
1294
1295/* called whenever the libev signal pipe */
1296/* got some events (signal, async) */
144static void 1297static void
145anfds_init (ANFD *base, int count) 1298pipecb (EV_P_ ev_io *iow, int revents)
146{ 1299{
147 while (count--) 1300 int i;
148 { 1301
149 base->head = 0; 1302#if EV_USE_EVENTFD
150 base->wev = base->rev = EV_NONE; 1303 if (evfd >= 0)
151 ++base;
152 } 1304 {
153} 1305 uint64_t counter;
1306 read (evfd, &counter, sizeof (uint64_t));
1307 }
1308 else
1309#endif
1310 {
1311 char dummy;
1312 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1313 read (evpipe [0], &dummy, 1);
1314 }
154 1315
155typedef struct 1316 if (sig_pending)
156{ 1317 {
157 W w; 1318 sig_pending = 0;
158 int events;
159} ANPENDING;
160 1319
161static ANPENDING *pendings; 1320 for (i = EV_NSIG - 1; i--; )
162static int pendingmax, pendingcnt; 1321 if (expect_false (signals [i].pending))
1322 ev_feed_signal_event (EV_A_ i + 1);
1323 }
1324
1325#if EV_ASYNC_ENABLE
1326 if (async_pending)
1327 {
1328 async_pending = 0;
1329
1330 for (i = asynccnt; i--; )
1331 if (asyncs [i]->sent)
1332 {
1333 asyncs [i]->sent = 0;
1334 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1335 }
1336 }
1337#endif
1338}
1339
1340/*****************************************************************************/
163 1341
164static void 1342static void
165event (W w, int events) 1343ev_sighandler (int signum)
166{ 1344{
167 if (w->active) 1345#if EV_MULTIPLICITY
168 { 1346 EV_P = signals [signum - 1].loop;
169 w->pending = ++pendingcnt; 1347#endif
170 array_needsize (pendings, pendingmax, pendingcnt, );
171 pendings [pendingcnt - 1].w = w;
172 pendings [pendingcnt - 1].events = events;
173 }
174}
175 1348
1349#ifdef _WIN32
1350 signal (signum, ev_sighandler);
1351#endif
1352
1353 signals [signum - 1].pending = 1;
1354 evpipe_write (EV_A_ &sig_pending);
1355}
1356
1357void noinline
1358ev_feed_signal_event (EV_P_ int signum)
1359{
1360 WL w;
1361
1362 if (expect_false (signum <= 0 || signum > EV_NSIG))
1363 return;
1364
1365 --signum;
1366
1367#if EV_MULTIPLICITY
1368 /* it is permissible to try to feed a signal to the wrong loop */
1369 /* or, likely more useful, feeding a signal nobody is waiting for */
1370
1371 if (expect_false (signals [signum].loop != EV_A))
1372 return;
1373#endif
1374
1375 signals [signum].pending = 0;
1376
1377 for (w = signals [signum].head; w; w = w->next)
1378 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1379}
1380
1381#if EV_USE_SIGNALFD
176static void 1382static void
177fd_event (int fd, int events) 1383sigfdcb (EV_P_ ev_io *iow, int revents)
178{ 1384{
179 ANFD *anfd = anfds + fd; 1385 struct signalfd_siginfo si[2], *sip; /* these structs are big */
180 struct ev_io *w;
181 1386
182 for (w = anfd->head; w; w = w->next) 1387 for (;;)
183 {
184 int ev = w->events & events;
185
186 if (ev)
187 event ((W)w, ev);
188 } 1388 {
189} 1389 ssize_t res = read (sigfd, si, sizeof (si));
190 1390
191static void 1391 /* not ISO-C, as res might be -1, but works with SuS */
192queue_events (W *events, int eventcnt, int type) 1392 for (sip = si; (char *)sip < (char *)si + res; ++sip)
193{ 1393 ev_feed_signal_event (EV_A_ sip->ssi_signo);
194 int i;
195 1394
196 for (i = 0; i < eventcnt; ++i) 1395 if (res < (ssize_t)sizeof (si))
197 event (events [i], type); 1396 break;
1397 }
198} 1398}
1399#endif
199 1400
200/* called on EBADF to verify fds */ 1401#endif
201static void
202fd_recheck (void)
203{
204 int fd;
205
206 for (fd = 0; fd < anfdmax; ++fd)
207 if (anfds [fd].wev)
208 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209 while (anfds [fd].head)
210 {
211 event ((W)anfds [fd].head, EV_ERROR);
212 evio_stop (anfds [fd].head);
213 }
214}
215 1402
216/*****************************************************************************/ 1403/*****************************************************************************/
217 1404
218static struct ev_timer **timers; 1405#if EV_CHILD_ENABLE
219static int timermax, timercnt; 1406static WL childs [EV_PID_HASHSIZE];
220 1407
221static struct ev_periodic **periodics;
222static int periodicmax, periodiccnt;
223
224static void
225upheap (WT *timers, int k)
226{
227 WT w = timers [k];
228
229 while (k && timers [k >> 1]->at > w->at)
230 {
231 timers [k] = timers [k >> 1];
232 timers [k]->active = k + 1;
233 k >>= 1;
234 }
235
236 timers [k] = w;
237 timers [k]->active = k + 1;
238
239}
240
241static void
242downheap (WT *timers, int N, int k)
243{
244 WT w = timers [k];
245
246 while (k < (N >> 1))
247 {
248 int j = k << 1;
249
250 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
251 ++j;
252
253 if (w->at <= timers [j]->at)
254 break;
255
256 timers [k] = timers [j];
257 timers [k]->active = k + 1;
258 k = j;
259 }
260
261 timers [k] = w;
262 timers [k]->active = k + 1;
263}
264
265/*****************************************************************************/
266
267typedef struct
268{
269 struct ev_signal *head;
270 sig_atomic_t gotsig;
271} ANSIG;
272
273static ANSIG *signals;
274static int signalmax;
275
276static int sigpipe [2];
277static sig_atomic_t gotsig;
278static struct ev_io sigev;
279
280static void
281signals_init (ANSIG *base, int count)
282{
283 while (count--)
284 {
285 base->head = 0;
286 base->gotsig = 0;
287 ++base;
288 }
289}
290
291static void
292sighandler (int signum)
293{
294 signals [signum - 1].gotsig = 1;
295
296 if (!gotsig)
297 {
298 gotsig = 1;
299 write (sigpipe [1], &gotsig, 1);
300 }
301}
302
303static void
304sigcb (struct ev_io *iow, int revents)
305{
306 struct ev_signal *w;
307 int sig;
308
309 gotsig = 0;
310 read (sigpipe [0], &revents, 1);
311
312 for (sig = signalmax; sig--; )
313 if (signals [sig].gotsig)
314 {
315 signals [sig].gotsig = 0;
316
317 for (w = signals [sig].head; w; w = w->next)
318 event ((W)w, EV_SIGNAL);
319 }
320}
321
322static void
323siginit (void)
324{
325 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328 /* rather than sort out wether we really need nb, set it */
329 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
331
332 evio_set (&sigev, sigpipe [0], EV_READ);
333 evio_start (&sigev);
334}
335
336/*****************************************************************************/
337
338static struct ev_idle **idles;
339static int idlemax, idlecnt;
340
341static struct ev_prepare **prepares;
342static int preparemax, preparecnt;
343
344static struct ev_check **checks;
345static int checkmax, checkcnt;
346
347/*****************************************************************************/
348
349static struct ev_child *childs [PID_HASHSIZE];
350static struct ev_signal childev; 1408static ev_signal childev;
1409
1410#ifndef WIFCONTINUED
1411# define WIFCONTINUED(status) 0
1412#endif
1413
1414/* handle a single child status event */
1415inline_speed void
1416child_reap (EV_P_ int chain, int pid, int status)
1417{
1418 ev_child *w;
1419 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1420
1421 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1422 {
1423 if ((w->pid == pid || !w->pid)
1424 && (!traced || (w->flags & 1)))
1425 {
1426 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1427 w->rpid = pid;
1428 w->rstatus = status;
1429 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1430 }
1431 }
1432}
351 1433
352#ifndef WCONTINUED 1434#ifndef WCONTINUED
353# define WCONTINUED 0 1435# define WCONTINUED 0
354#endif 1436#endif
355 1437
1438/* called on sigchld etc., calls waitpid */
356static void 1439static void
357childcb (struct ev_signal *sw, int revents) 1440childcb (EV_P_ ev_signal *sw, int revents)
358{ 1441{
359 struct ev_child *w;
360 int pid, status; 1442 int pid, status;
361 1443
1444 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
362 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1445 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1446 if (!WCONTINUED
364 if (w->pid == pid || w->pid == -1) 1447 || errno != EINVAL
365 { 1448 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
366 w->status = status; 1449 return;
367 event ((W)w, EV_CHILD); 1450
368 } 1451 /* make sure we are called again until all children have been reaped */
1452 /* we need to do it this way so that the callback gets called before we continue */
1453 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1454
1455 child_reap (EV_A_ pid, pid, status);
1456 if ((EV_PID_HASHSIZE) > 1)
1457 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
369} 1458}
1459
1460#endif
370 1461
371/*****************************************************************************/ 1462/*****************************************************************************/
372 1463
1464#if EV_USE_PORT
1465# include "ev_port.c"
1466#endif
1467#if EV_USE_KQUEUE
1468# include "ev_kqueue.c"
1469#endif
373#if HAVE_EPOLL 1470#if EV_USE_EPOLL
374# include "ev_epoll.c" 1471# include "ev_epoll.c"
375#endif 1472#endif
1473#if EV_USE_POLL
1474# include "ev_poll.c"
1475#endif
376#if HAVE_SELECT 1476#if EV_USE_SELECT
377# include "ev_select.c" 1477# include "ev_select.c"
378#endif 1478#endif
379 1479
380int 1480int
381ev_version_major (void) 1481ev_version_major (void)
… …
387ev_version_minor (void) 1487ev_version_minor (void)
388{ 1488{
389 return EV_VERSION_MINOR; 1489 return EV_VERSION_MINOR;
390} 1490}
391 1491
392int ev_init (int flags) 1492/* return true if we are running with elevated privileges and should ignore env variables */
1493int inline_size
1494enable_secure (void)
393{ 1495{
394 if (!ev_method) 1496#ifdef _WIN32
1497 return 0;
1498#else
1499 return getuid () != geteuid ()
1500 || getgid () != getegid ();
1501#endif
1502}
1503
1504unsigned int
1505ev_supported_backends (void)
1506{
1507 unsigned int flags = 0;
1508
1509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1510 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1511 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1512 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1514
1515 return flags;
1516}
1517
1518unsigned int
1519ev_recommended_backends (void)
1520{
1521 unsigned int flags = ev_supported_backends ();
1522
1523#ifndef __NetBSD__
1524 /* kqueue is borked on everything but netbsd apparently */
1525 /* it usually doesn't work correctly on anything but sockets and pipes */
1526 flags &= ~EVBACKEND_KQUEUE;
1527#endif
1528#ifdef __APPLE__
1529 /* only select works correctly on that "unix-certified" platform */
1530 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1531 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1532#endif
1533#ifdef __FreeBSD__
1534 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1535#endif
1536
1537 return flags;
1538}
1539
1540unsigned int
1541ev_embeddable_backends (void)
1542{
1543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1544
1545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1546 /* please fix it and tell me how to detect the fix */
1547 flags &= ~EVBACKEND_EPOLL;
1548
1549 return flags;
1550}
1551
1552unsigned int
1553ev_backend (EV_P)
1554{
1555 return backend;
1556}
1557
1558#if EV_FEATURE_API
1559unsigned int
1560ev_iteration (EV_P)
1561{
1562 return loop_count;
1563}
1564
1565unsigned int
1566ev_depth (EV_P)
1567{
1568 return loop_depth;
1569}
1570
1571void
1572ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1573{
1574 io_blocktime = interval;
1575}
1576
1577void
1578ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1579{
1580 timeout_blocktime = interval;
1581}
1582
1583void
1584ev_set_userdata (EV_P_ void *data)
1585{
1586 userdata = data;
1587}
1588
1589void *
1590ev_userdata (EV_P)
1591{
1592 return userdata;
1593}
1594
1595void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1596{
1597 invoke_cb = invoke_pending_cb;
1598}
1599
1600void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1601{
1602 release_cb = release;
1603 acquire_cb = acquire;
1604}
1605#endif
1606
1607/* initialise a loop structure, must be zero-initialised */
1608static void noinline
1609loop_init (EV_P_ unsigned int flags)
1610{
1611 if (!backend)
395 { 1612 {
1613#if EV_USE_REALTIME
1614 if (!have_realtime)
1615 {
1616 struct timespec ts;
1617
1618 if (!clock_gettime (CLOCK_REALTIME, &ts))
1619 have_realtime = 1;
1620 }
1621#endif
1622
396#if HAVE_MONOTONIC 1623#if EV_USE_MONOTONIC
1624 if (!have_monotonic)
1625 {
1626 struct timespec ts;
1627
1628 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1629 have_monotonic = 1;
1630 }
1631#endif
1632
1633 /* pid check not overridable via env */
1634#ifndef _WIN32
1635 if (flags & EVFLAG_FORKCHECK)
1636 curpid = getpid ();
1637#endif
1638
1639 if (!(flags & EVFLAG_NOENV)
1640 && !enable_secure ()
1641 && getenv ("LIBEV_FLAGS"))
1642 flags = atoi (getenv ("LIBEV_FLAGS"));
1643
1644 ev_rt_now = ev_time ();
1645 mn_now = get_clock ();
1646 now_floor = mn_now;
1647 rtmn_diff = ev_rt_now - mn_now;
1648#if EV_FEATURE_API
1649 invoke_cb = ev_invoke_pending;
1650#endif
1651
1652 io_blocktime = 0.;
1653 timeout_blocktime = 0.;
1654 backend = 0;
1655 backend_fd = -1;
1656 sig_pending = 0;
1657#if EV_ASYNC_ENABLE
1658 async_pending = 0;
1659#endif
1660#if EV_USE_INOTIFY
1661 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1662#endif
1663#if EV_USE_SIGNALFD
1664 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1665#endif
1666
1667 if (!(flags & 0x0000ffffU))
1668 flags |= ev_recommended_backends ();
1669
1670#if EV_USE_PORT
1671 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1672#endif
1673#if EV_USE_KQUEUE
1674 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1675#endif
1676#if EV_USE_EPOLL
1677 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1678#endif
1679#if EV_USE_POLL
1680 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1681#endif
1682#if EV_USE_SELECT
1683 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1684#endif
1685
1686 ev_prepare_init (&pending_w, pendingcb);
1687
1688#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1689 ev_init (&pipe_w, pipecb);
1690 ev_set_priority (&pipe_w, EV_MAXPRI);
1691#endif
1692 }
1693}
1694
1695/* free up a loop structure */
1696static void noinline
1697loop_destroy (EV_P)
1698{
1699 int i;
1700
1701 if (ev_is_active (&pipe_w))
1702 {
1703 /*ev_ref (EV_A);*/
1704 /*ev_io_stop (EV_A_ &pipe_w);*/
1705
1706#if EV_USE_EVENTFD
1707 if (evfd >= 0)
1708 close (evfd);
1709#endif
1710
1711 if (evpipe [0] >= 0)
1712 {
1713 EV_WIN32_CLOSE_FD (evpipe [0]);
1714 EV_WIN32_CLOSE_FD (evpipe [1]);
1715 }
1716 }
1717
1718#if EV_USE_SIGNALFD
1719 if (ev_is_active (&sigfd_w))
1720 close (sigfd);
1721#endif
1722
1723#if EV_USE_INOTIFY
1724 if (fs_fd >= 0)
1725 close (fs_fd);
1726#endif
1727
1728 if (backend_fd >= 0)
1729 close (backend_fd);
1730
1731#if EV_USE_PORT
1732 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1733#endif
1734#if EV_USE_KQUEUE
1735 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1736#endif
1737#if EV_USE_EPOLL
1738 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1739#endif
1740#if EV_USE_POLL
1741 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1742#endif
1743#if EV_USE_SELECT
1744 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1745#endif
1746
1747 for (i = NUMPRI; i--; )
1748 {
1749 array_free (pending, [i]);
1750#if EV_IDLE_ENABLE
1751 array_free (idle, [i]);
1752#endif
1753 }
1754
1755 ev_free (anfds); anfds = 0; anfdmax = 0;
1756
1757 /* have to use the microsoft-never-gets-it-right macro */
1758 array_free (rfeed, EMPTY);
1759 array_free (fdchange, EMPTY);
1760 array_free (timer, EMPTY);
1761#if EV_PERIODIC_ENABLE
1762 array_free (periodic, EMPTY);
1763#endif
1764#if EV_FORK_ENABLE
1765 array_free (fork, EMPTY);
1766#endif
1767 array_free (prepare, EMPTY);
1768 array_free (check, EMPTY);
1769#if EV_ASYNC_ENABLE
1770 array_free (async, EMPTY);
1771#endif
1772
1773 backend = 0;
1774}
1775
1776#if EV_USE_INOTIFY
1777inline_size void infy_fork (EV_P);
1778#endif
1779
1780inline_size void
1781loop_fork (EV_P)
1782{
1783#if EV_USE_PORT
1784 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1785#endif
1786#if EV_USE_KQUEUE
1787 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1788#endif
1789#if EV_USE_EPOLL
1790 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1791#endif
1792#if EV_USE_INOTIFY
1793 infy_fork (EV_A);
1794#endif
1795
1796 if (ev_is_active (&pipe_w))
1797 {
1798 /* this "locks" the handlers against writing to the pipe */
1799 /* while we modify the fd vars */
1800 sig_pending = 1;
1801#if EV_ASYNC_ENABLE
1802 async_pending = 1;
1803#endif
1804
1805 ev_ref (EV_A);
1806 ev_io_stop (EV_A_ &pipe_w);
1807
1808#if EV_USE_EVENTFD
1809 if (evfd >= 0)
1810 close (evfd);
1811#endif
1812
1813 if (evpipe [0] >= 0)
1814 {
1815 EV_WIN32_CLOSE_FD (evpipe [0]);
1816 EV_WIN32_CLOSE_FD (evpipe [1]);
1817 }
1818
1819#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1820 evpipe_init (EV_A);
1821 /* now iterate over everything, in case we missed something */
1822 pipecb (EV_A_ &pipe_w, EV_READ);
1823#endif
1824 }
1825
1826 postfork = 0;
1827}
1828
1829#if EV_MULTIPLICITY
1830
1831struct ev_loop *
1832ev_loop_new (unsigned int flags)
1833{
1834 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1835
1836 memset (EV_A, 0, sizeof (struct ev_loop));
1837 loop_init (EV_A_ flags);
1838
1839 if (ev_backend (EV_A))
1840 return EV_A;
1841
1842 return 0;
1843}
1844
1845void
1846ev_loop_destroy (EV_P)
1847{
1848 loop_destroy (EV_A);
1849 ev_free (loop);
1850}
1851
1852void
1853ev_loop_fork (EV_P)
1854{
1855 postfork = 1; /* must be in line with ev_default_fork */
1856}
1857#endif /* multiplicity */
1858
1859#if EV_VERIFY
1860static void noinline
1861verify_watcher (EV_P_ W w)
1862{
1863 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1864
1865 if (w->pending)
1866 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1867}
1868
1869static void noinline
1870verify_heap (EV_P_ ANHE *heap, int N)
1871{
1872 int i;
1873
1874 for (i = HEAP0; i < N + HEAP0; ++i)
1875 {
1876 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1877 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1878 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1879
1880 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1881 }
1882}
1883
1884static void noinline
1885array_verify (EV_P_ W *ws, int cnt)
1886{
1887 while (cnt--)
1888 {
1889 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1890 verify_watcher (EV_A_ ws [cnt]);
1891 }
1892}
1893#endif
1894
1895#if EV_FEATURE_API
1896void
1897ev_verify (EV_P)
1898{
1899#if EV_VERIFY
1900 int i;
1901 WL w;
1902
1903 assert (activecnt >= -1);
1904
1905 assert (fdchangemax >= fdchangecnt);
1906 for (i = 0; i < fdchangecnt; ++i)
1907 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1908
1909 assert (anfdmax >= 0);
1910 for (i = 0; i < anfdmax; ++i)
1911 for (w = anfds [i].head; w; w = w->next)
397 { 1912 {
398 struct timespec ts; 1913 verify_watcher (EV_A_ (W)w);
399 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1914 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
400 have_monotonic = 1; 1915 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
401 } 1916 }
1917
1918 assert (timermax >= timercnt);
1919 verify_heap (EV_A_ timers, timercnt);
1920
1921#if EV_PERIODIC_ENABLE
1922 assert (periodicmax >= periodiccnt);
1923 verify_heap (EV_A_ periodics, periodiccnt);
1924#endif
1925
1926 for (i = NUMPRI; i--; )
1927 {
1928 assert (pendingmax [i] >= pendingcnt [i]);
1929#if EV_IDLE_ENABLE
1930 assert (idleall >= 0);
1931 assert (idlemax [i] >= idlecnt [i]);
1932 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1933#endif
1934 }
1935
1936#if EV_FORK_ENABLE
1937 assert (forkmax >= forkcnt);
1938 array_verify (EV_A_ (W *)forks, forkcnt);
1939#endif
1940
1941#if EV_ASYNC_ENABLE
1942 assert (asyncmax >= asynccnt);
1943 array_verify (EV_A_ (W *)asyncs, asynccnt);
1944#endif
1945
1946#if EV_PREPARE_ENABLE
1947 assert (preparemax >= preparecnt);
1948 array_verify (EV_A_ (W *)prepares, preparecnt);
1949#endif
1950
1951#if EV_CHECK_ENABLE
1952 assert (checkmax >= checkcnt);
1953 array_verify (EV_A_ (W *)checks, checkcnt);
1954#endif
1955
1956# if 0
1957#if EV_CHILD_ENABLE
1958 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1959 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1960#endif
402#endif 1961# endif
403
404 ev_now = ev_time ();
405 now = get_clock ();
406 diff = ev_now - now;
407
408 if (pipe (sigpipe))
409 return 0;
410
411 ev_method = EVMETHOD_NONE;
412#if HAVE_EPOLL
413 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
414#endif 1962#endif
415#if HAVE_SELECT 1963}
416 if (ev_method == EVMETHOD_NONE) select_init (flags);
417#endif 1964#endif
418 1965
419 if (ev_method) 1966#if EV_MULTIPLICITY
1967struct ev_loop *
1968ev_default_loop_init (unsigned int flags)
1969#else
1970int
1971ev_default_loop (unsigned int flags)
1972#endif
1973{
1974 if (!ev_default_loop_ptr)
1975 {
1976#if EV_MULTIPLICITY
1977 EV_P = ev_default_loop_ptr = &default_loop_struct;
1978#else
1979 ev_default_loop_ptr = 1;
1980#endif
1981
1982 loop_init (EV_A_ flags);
1983
1984 if (ev_backend (EV_A))
420 { 1985 {
421 evw_init (&sigev, sigcb); 1986#if EV_CHILD_ENABLE
422 siginit ();
423
424 evsignal_init (&childev, childcb, SIGCHLD); 1987 ev_signal_init (&childev, childcb, SIGCHLD);
1988 ev_set_priority (&childev, EV_MAXPRI);
425 evsignal_start (&childev); 1989 ev_signal_start (EV_A_ &childev);
1990 ev_unref (EV_A); /* child watcher should not keep loop alive */
1991#endif
426 } 1992 }
1993 else
1994 ev_default_loop_ptr = 0;
427 } 1995 }
428 1996
429 return ev_method; 1997 return ev_default_loop_ptr;
1998}
1999
2000void
2001ev_default_destroy (void)
2002{
2003#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr;
2005#endif
2006
2007 ev_default_loop_ptr = 0;
2008
2009#if EV_CHILD_ENABLE
2010 ev_ref (EV_A); /* child watcher */
2011 ev_signal_stop (EV_A_ &childev);
2012#endif
2013
2014 loop_destroy (EV_A);
2015}
2016
2017void
2018ev_default_fork (void)
2019{
2020#if EV_MULTIPLICITY
2021 EV_P = ev_default_loop_ptr;
2022#endif
2023
2024 postfork = 1; /* must be in line with ev_loop_fork */
430} 2025}
431 2026
432/*****************************************************************************/ 2027/*****************************************************************************/
433 2028
434void 2029void
435ev_prefork (void) 2030ev_invoke (EV_P_ void *w, int revents)
436{ 2031{
437 /* nop */ 2032 EV_CB_INVOKE ((W)w, revents);
438} 2033}
439 2034
440void 2035unsigned int
441ev_postfork_parent (void) 2036ev_pending_count (EV_P)
442{ 2037{
443 /* nop */ 2038 int pri;
444} 2039 unsigned int count = 0;
445 2040
446void 2041 for (pri = NUMPRI; pri--; )
447ev_postfork_child (void) 2042 count += pendingcnt [pri];
2043
2044 return count;
2045}
2046
2047void noinline
2048ev_invoke_pending (EV_P)
448{ 2049{
449#if HAVE_EPOLL 2050 int pri;
450 if (ev_method == EVMETHOD_EPOLL) 2051
451 epoll_postfork_child (); 2052 for (pri = NUMPRI; pri--; )
2053 while (pendingcnt [pri])
2054 {
2055 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2056
2057 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2058 /* ^ this is no longer true, as pending_w could be here */
2059
2060 p->w->pending = 0;
2061 EV_CB_INVOKE (p->w, p->events);
2062 EV_FREQUENT_CHECK;
2063 }
2064}
2065
2066#if EV_IDLE_ENABLE
2067/* make idle watchers pending. this handles the "call-idle */
2068/* only when higher priorities are idle" logic */
2069inline_size void
2070idle_reify (EV_P)
2071{
2072 if (expect_false (idleall))
2073 {
2074 int pri;
2075
2076 for (pri = NUMPRI; pri--; )
2077 {
2078 if (pendingcnt [pri])
2079 break;
2080
2081 if (idlecnt [pri])
2082 {
2083 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2084 break;
2085 }
2086 }
2087 }
2088}
2089#endif
2090
2091/* make timers pending */
2092inline_size void
2093timers_reify (EV_P)
2094{
2095 EV_FREQUENT_CHECK;
2096
2097 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2098 {
2099 do
2100 {
2101 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2102
2103 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2104
2105 /* first reschedule or stop timer */
2106 if (w->repeat)
2107 {
2108 ev_at (w) += w->repeat;
2109 if (ev_at (w) < mn_now)
2110 ev_at (w) = mn_now;
2111
2112 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2113
2114 ANHE_at_cache (timers [HEAP0]);
2115 downheap (timers, timercnt, HEAP0);
2116 }
2117 else
2118 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2119
2120 EV_FREQUENT_CHECK;
2121 feed_reverse (EV_A_ (W)w);
2122 }
2123 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2124
2125 feed_reverse_done (EV_A_ EV_TIMER);
2126 }
2127}
2128
2129#if EV_PERIODIC_ENABLE
2130/* make periodics pending */
2131inline_size void
2132periodics_reify (EV_P)
2133{
2134 EV_FREQUENT_CHECK;
2135
2136 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2137 {
2138 int feed_count = 0;
2139
2140 do
2141 {
2142 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2143
2144 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2145
2146 /* first reschedule or stop timer */
2147 if (w->reschedule_cb)
2148 {
2149 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2150
2151 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2152
2153 ANHE_at_cache (periodics [HEAP0]);
2154 downheap (periodics, periodiccnt, HEAP0);
2155 }
2156 else if (w->interval)
2157 {
2158 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2159 /* if next trigger time is not sufficiently in the future, put it there */
2160 /* this might happen because of floating point inexactness */
2161 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2162 {
2163 ev_at (w) += w->interval;
2164
2165 /* if interval is unreasonably low we might still have a time in the past */
2166 /* so correct this. this will make the periodic very inexact, but the user */
2167 /* has effectively asked to get triggered more often than possible */
2168 if (ev_at (w) < ev_rt_now)
2169 ev_at (w) = ev_rt_now;
2170 }
2171
2172 ANHE_at_cache (periodics [HEAP0]);
2173 downheap (periodics, periodiccnt, HEAP0);
2174 }
2175 else
2176 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2177
2178 EV_FREQUENT_CHECK;
2179 feed_reverse (EV_A_ (W)w);
2180 }
2181 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2182
2183 feed_reverse_done (EV_A_ EV_PERIODIC);
2184 }
2185}
2186
2187/* simply recalculate all periodics */
2188/* TODO: maybe ensure that at least one event happens when jumping forward? */
2189static void noinline
2190periodics_reschedule (EV_P)
2191{
2192 int i;
2193
2194 /* adjust periodics after time jump */
2195 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2196 {
2197 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2198
2199 if (w->reschedule_cb)
2200 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2201 else if (w->interval)
2202 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2203
2204 ANHE_at_cache (periodics [i]);
2205 }
2206
2207 reheap (periodics, periodiccnt);
2208}
2209#endif
2210
2211/* adjust all timers by a given offset */
2212static void noinline
2213timers_reschedule (EV_P_ ev_tstamp adjust)
2214{
2215 int i;
2216
2217 for (i = 0; i < timercnt; ++i)
2218 {
2219 ANHE *he = timers + i + HEAP0;
2220 ANHE_w (*he)->at += adjust;
2221 ANHE_at_cache (*he);
2222 }
2223}
2224
2225/* fetch new monotonic and realtime times from the kernel */
2226/* also detect if there was a timejump, and act accordingly */
2227inline_speed void
2228time_update (EV_P_ ev_tstamp max_block)
2229{
2230#if EV_USE_MONOTONIC
2231 if (expect_true (have_monotonic))
2232 {
2233 int i;
2234 ev_tstamp odiff = rtmn_diff;
2235
2236 mn_now = get_clock ();
2237
2238 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2239 /* interpolate in the meantime */
2240 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2241 {
2242 ev_rt_now = rtmn_diff + mn_now;
2243 return;
2244 }
2245
2246 now_floor = mn_now;
2247 ev_rt_now = ev_time ();
2248
2249 /* loop a few times, before making important decisions.
2250 * on the choice of "4": one iteration isn't enough,
2251 * in case we get preempted during the calls to
2252 * ev_time and get_clock. a second call is almost guaranteed
2253 * to succeed in that case, though. and looping a few more times
2254 * doesn't hurt either as we only do this on time-jumps or
2255 * in the unlikely event of having been preempted here.
2256 */
2257 for (i = 4; --i; )
2258 {
2259 rtmn_diff = ev_rt_now - mn_now;
2260
2261 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2262 return; /* all is well */
2263
2264 ev_rt_now = ev_time ();
2265 mn_now = get_clock ();
2266 now_floor = mn_now;
2267 }
2268
2269 /* no timer adjustment, as the monotonic clock doesn't jump */
2270 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2271# if EV_PERIODIC_ENABLE
2272 periodics_reschedule (EV_A);
452#endif 2273# endif
2274 }
2275 else
2276#endif
2277 {
2278 ev_rt_now = ev_time ();
453 2279
454 evio_stop (&sigev); 2280 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
455 close (sigpipe [0]); 2281 {
456 close (sigpipe [1]); 2282 /* adjust timers. this is easy, as the offset is the same for all of them */
457 pipe (sigpipe); 2283 timers_reschedule (EV_A_ ev_rt_now - mn_now);
458 siginit (); 2284#if EV_PERIODIC_ENABLE
2285 periodics_reschedule (EV_A);
2286#endif
2287 }
2288
2289 mn_now = ev_rt_now;
2290 }
2291}
2292
2293void
2294ev_loop (EV_P_ int flags)
2295{
2296#if EV_FEATURE_API
2297 ++loop_depth;
2298#endif
2299
2300 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2301
2302 loop_done = EVUNLOOP_CANCEL;
2303
2304 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2305
2306 do
2307 {
2308#if EV_VERIFY >= 2
2309 ev_verify (EV_A);
2310#endif
2311
2312#ifndef _WIN32
2313 if (expect_false (curpid)) /* penalise the forking check even more */
2314 if (expect_false (getpid () != curpid))
2315 {
2316 curpid = getpid ();
2317 postfork = 1;
2318 }
2319#endif
2320
2321#if EV_FORK_ENABLE
2322 /* we might have forked, so queue fork handlers */
2323 if (expect_false (postfork))
2324 if (forkcnt)
2325 {
2326 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2327 EV_INVOKE_PENDING;
2328 }
2329#endif
2330
2331#if EV_PREPARE_ENABLE
2332 /* queue prepare watchers (and execute them) */
2333 if (expect_false (preparecnt))
2334 {
2335 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2336 EV_INVOKE_PENDING;
2337 }
2338#endif
2339
2340 if (expect_false (loop_done))
2341 break;
2342
2343 /* we might have forked, so reify kernel state if necessary */
2344 if (expect_false (postfork))
2345 loop_fork (EV_A);
2346
2347 /* update fd-related kernel structures */
2348 fd_reify (EV_A);
2349
2350 /* calculate blocking time */
2351 {
2352 ev_tstamp waittime = 0.;
2353 ev_tstamp sleeptime = 0.;
2354
2355 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2356 {
2357 /* remember old timestamp for io_blocktime calculation */
2358 ev_tstamp prev_mn_now = mn_now;
2359
2360 /* update time to cancel out callback processing overhead */
2361 time_update (EV_A_ 1e100);
2362
2363 waittime = MAX_BLOCKTIME;
2364
2365 if (timercnt)
2366 {
2367 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2368 if (waittime > to) waittime = to;
2369 }
2370
2371#if EV_PERIODIC_ENABLE
2372 if (periodiccnt)
2373 {
2374 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2375 if (waittime > to) waittime = to;
2376 }
2377#endif
2378
2379 /* don't let timeouts decrease the waittime below timeout_blocktime */
2380 if (expect_false (waittime < timeout_blocktime))
2381 waittime = timeout_blocktime;
2382
2383 /* extra check because io_blocktime is commonly 0 */
2384 if (expect_false (io_blocktime))
2385 {
2386 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2387
2388 if (sleeptime > waittime - backend_fudge)
2389 sleeptime = waittime - backend_fudge;
2390
2391 if (expect_true (sleeptime > 0.))
2392 {
2393 ev_sleep (sleeptime);
2394 waittime -= sleeptime;
2395 }
2396 }
2397 }
2398
2399#if EV_FEATURE_API
2400 ++loop_count;
2401#endif
2402 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2403 backend_poll (EV_A_ waittime);
2404 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2405
2406 /* update ev_rt_now, do magic */
2407 time_update (EV_A_ waittime + sleeptime);
2408 }
2409
2410 /* queue pending timers and reschedule them */
2411 timers_reify (EV_A); /* relative timers called last */
2412#if EV_PERIODIC_ENABLE
2413 periodics_reify (EV_A); /* absolute timers called first */
2414#endif
2415
2416#if EV_IDLE_ENABLE
2417 /* queue idle watchers unless other events are pending */
2418 idle_reify (EV_A);
2419#endif
2420
2421#if EV_CHECK_ENABLE
2422 /* queue check watchers, to be executed first */
2423 if (expect_false (checkcnt))
2424 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2425#endif
2426
2427 EV_INVOKE_PENDING;
2428 }
2429 while (expect_true (
2430 activecnt
2431 && !loop_done
2432 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2433 ));
2434
2435 if (loop_done == EVUNLOOP_ONE)
2436 loop_done = EVUNLOOP_CANCEL;
2437
2438#if EV_FEATURE_API
2439 --loop_depth;
2440#endif
2441}
2442
2443void
2444ev_unloop (EV_P_ int how)
2445{
2446 loop_done = how;
2447}
2448
2449void
2450ev_ref (EV_P)
2451{
2452 ++activecnt;
2453}
2454
2455void
2456ev_unref (EV_P)
2457{
2458 --activecnt;
2459}
2460
2461void
2462ev_now_update (EV_P)
2463{
2464 time_update (EV_A_ 1e100);
2465}
2466
2467void
2468ev_suspend (EV_P)
2469{
2470 ev_now_update (EV_A);
2471}
2472
2473void
2474ev_resume (EV_P)
2475{
2476 ev_tstamp mn_prev = mn_now;
2477
2478 ev_now_update (EV_A);
2479 timers_reschedule (EV_A_ mn_now - mn_prev);
2480#if EV_PERIODIC_ENABLE
2481 /* TODO: really do this? */
2482 periodics_reschedule (EV_A);
2483#endif
459} 2484}
460 2485
461/*****************************************************************************/ 2486/*****************************************************************************/
2487/* singly-linked list management, used when the expected list length is short */
462 2488
463static void 2489inline_size void
464fd_reify (void) 2490wlist_add (WL *head, WL elem)
465{ 2491{
466 int i; 2492 elem->next = *head;
2493 *head = elem;
2494}
467 2495
468 for (i = 0; i < fdchangecnt; ++i) 2496inline_size void
2497wlist_del (WL *head, WL elem)
2498{
2499 while (*head)
469 { 2500 {
470 int fd = fdchanges [i]; 2501 if (expect_true (*head == elem))
471 ANFD *anfd = anfds + fd;
472 struct ev_io *w;
473
474 int wev = 0;
475
476 for (w = anfd->head; w; w = w->next)
477 wev |= w->events;
478
479 if (anfd->wev != wev)
480 { 2502 {
481 method_modify (fd, anfd->wev, wev); 2503 *head = elem->next;
482 anfd->wev = wev; 2504 break;
483 } 2505 }
484 }
485 2506
486 fdchangecnt = 0; 2507 head = &(*head)->next;
487}
488
489static void
490call_pending (void)
491{
492 while (pendingcnt)
493 { 2508 }
2509}
2510
2511/* internal, faster, version of ev_clear_pending */
2512inline_speed void
2513clear_pending (EV_P_ W w)
2514{
2515 if (w->pending)
2516 {
2517 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2518 w->pending = 0;
2519 }
2520}
2521
2522int
2523ev_clear_pending (EV_P_ void *w)
2524{
2525 W w_ = (W)w;
2526 int pending = w_->pending;
2527
2528 if (expect_true (pending))
2529 {
494 ANPENDING *p = pendings + --pendingcnt; 2530 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2531 p->w = (W)&pending_w;
2532 w_->pending = 0;
2533 return p->events;
2534 }
2535 else
2536 return 0;
2537}
495 2538
496 if (p->w) 2539inline_size void
2540pri_adjust (EV_P_ W w)
2541{
2542 int pri = ev_priority (w);
2543 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2544 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2545 ev_set_priority (w, pri);
2546}
2547
2548inline_speed void
2549ev_start (EV_P_ W w, int active)
2550{
2551 pri_adjust (EV_A_ w);
2552 w->active = active;
2553 ev_ref (EV_A);
2554}
2555
2556inline_size void
2557ev_stop (EV_P_ W w)
2558{
2559 ev_unref (EV_A);
2560 w->active = 0;
2561}
2562
2563/*****************************************************************************/
2564
2565void noinline
2566ev_io_start (EV_P_ ev_io *w)
2567{
2568 int fd = w->fd;
2569
2570 if (expect_false (ev_is_active (w)))
2571 return;
2572
2573 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2574 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2575
2576 EV_FREQUENT_CHECK;
2577
2578 ev_start (EV_A_ (W)w, 1);
2579 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2580 wlist_add (&anfds[fd].head, (WL)w);
2581
2582 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2583 w->events &= ~EV__IOFDSET;
2584
2585 EV_FREQUENT_CHECK;
2586}
2587
2588void noinline
2589ev_io_stop (EV_P_ ev_io *w)
2590{
2591 clear_pending (EV_A_ (W)w);
2592 if (expect_false (!ev_is_active (w)))
2593 return;
2594
2595 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2596
2597 EV_FREQUENT_CHECK;
2598
2599 wlist_del (&anfds[w->fd].head, (WL)w);
2600 ev_stop (EV_A_ (W)w);
2601
2602 fd_change (EV_A_ w->fd, 1);
2603
2604 EV_FREQUENT_CHECK;
2605}
2606
2607void noinline
2608ev_timer_start (EV_P_ ev_timer *w)
2609{
2610 if (expect_false (ev_is_active (w)))
2611 return;
2612
2613 ev_at (w) += mn_now;
2614
2615 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2616
2617 EV_FREQUENT_CHECK;
2618
2619 ++timercnt;
2620 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2621 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2622 ANHE_w (timers [ev_active (w)]) = (WT)w;
2623 ANHE_at_cache (timers [ev_active (w)]);
2624 upheap (timers, ev_active (w));
2625
2626 EV_FREQUENT_CHECK;
2627
2628 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2629}
2630
2631void noinline
2632ev_timer_stop (EV_P_ ev_timer *w)
2633{
2634 clear_pending (EV_A_ (W)w);
2635 if (expect_false (!ev_is_active (w)))
2636 return;
2637
2638 EV_FREQUENT_CHECK;
2639
2640 {
2641 int active = ev_active (w);
2642
2643 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2644
2645 --timercnt;
2646
2647 if (expect_true (active < timercnt + HEAP0))
497 { 2648 {
498 p->w->pending = 0; 2649 timers [active] = timers [timercnt + HEAP0];
499 p->w->cb (p->w, p->events); 2650 adjustheap (timers, timercnt, active);
500 } 2651 }
2652 }
2653
2654 ev_at (w) -= mn_now;
2655
2656 ev_stop (EV_A_ (W)w);
2657
2658 EV_FREQUENT_CHECK;
2659}
2660
2661void noinline
2662ev_timer_again (EV_P_ ev_timer *w)
2663{
2664 EV_FREQUENT_CHECK;
2665
2666 if (ev_is_active (w))
501 } 2667 {
502}
503
504static void
505timers_reify (void)
506{
507 while (timercnt && timers [0]->at <= now)
508 {
509 struct ev_timer *w = timers [0];
510
511 event ((W)w, EV_TIMEOUT);
512
513 /* first reschedule or stop timer */
514 if (w->repeat) 2668 if (w->repeat)
515 { 2669 {
516 w->at = now + w->repeat; 2670 ev_at (w) = mn_now + w->repeat;
517 assert (("timer timeout in the past, negative repeat?", w->at > now)); 2671 ANHE_at_cache (timers [ev_active (w)]);
518 downheap ((WT *)timers, timercnt, 0); 2672 adjustheap (timers, timercnt, ev_active (w));
519 } 2673 }
520 else 2674 else
521 evtimer_stop (w); /* nonrepeating: stop timer */ 2675 ev_timer_stop (EV_A_ w);
522 }
523}
524
525static void
526periodics_reify (void)
527{
528 while (periodiccnt && periodics [0]->at <= ev_now)
529 { 2676 }
530 struct ev_periodic *w = periodics [0]; 2677 else if (w->repeat)
2678 {
2679 ev_at (w) = w->repeat;
2680 ev_timer_start (EV_A_ w);
2681 }
531 2682
532 /* first reschedule or stop timer */ 2683 EV_FREQUENT_CHECK;
2684}
2685
2686ev_tstamp
2687ev_timer_remaining (EV_P_ ev_timer *w)
2688{
2689 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2690}
2691
2692#if EV_PERIODIC_ENABLE
2693void noinline
2694ev_periodic_start (EV_P_ ev_periodic *w)
2695{
2696 if (expect_false (ev_is_active (w)))
2697 return;
2698
2699 if (w->reschedule_cb)
2700 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
533 if (w->interval) 2701 else if (w->interval)
2702 {
2703 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2704 /* this formula differs from the one in periodic_reify because we do not always round up */
2705 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2706 }
2707 else
2708 ev_at (w) = w->offset;
2709
2710 EV_FREQUENT_CHECK;
2711
2712 ++periodiccnt;
2713 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2714 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2715 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2716 ANHE_at_cache (periodics [ev_active (w)]);
2717 upheap (periodics, ev_active (w));
2718
2719 EV_FREQUENT_CHECK;
2720
2721 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2722}
2723
2724void noinline
2725ev_periodic_stop (EV_P_ ev_periodic *w)
2726{
2727 clear_pending (EV_A_ (W)w);
2728 if (expect_false (!ev_is_active (w)))
2729 return;
2730
2731 EV_FREQUENT_CHECK;
2732
2733 {
2734 int active = ev_active (w);
2735
2736 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2737
2738 --periodiccnt;
2739
2740 if (expect_true (active < periodiccnt + HEAP0))
2741 {
2742 periodics [active] = periodics [periodiccnt + HEAP0];
2743 adjustheap (periodics, periodiccnt, active);
2744 }
2745 }
2746
2747 ev_stop (EV_A_ (W)w);
2748
2749 EV_FREQUENT_CHECK;
2750}
2751
2752void noinline
2753ev_periodic_again (EV_P_ ev_periodic *w)
2754{
2755 /* TODO: use adjustheap and recalculation */
2756 ev_periodic_stop (EV_A_ w);
2757 ev_periodic_start (EV_A_ w);
2758}
2759#endif
2760
2761#ifndef SA_RESTART
2762# define SA_RESTART 0
2763#endif
2764
2765#if EV_SIGNAL_ENABLE
2766
2767void noinline
2768ev_signal_start (EV_P_ ev_signal *w)
2769{
2770 if (expect_false (ev_is_active (w)))
2771 return;
2772
2773 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2774
2775#if EV_MULTIPLICITY
2776 assert (("libev: a signal must not be attached to two different loops",
2777 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2778
2779 signals [w->signum - 1].loop = EV_A;
2780#endif
2781
2782 EV_FREQUENT_CHECK;
2783
2784#if EV_USE_SIGNALFD
2785 if (sigfd == -2)
2786 {
2787 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2788 if (sigfd < 0 && errno == EINVAL)
2789 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2790
2791 if (sigfd >= 0)
534 { 2792 {
535 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2793 fd_intern (sigfd); /* doing it twice will not hurt */
536 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 2794
537 downheap ((WT *)periodics, periodiccnt, 0); 2795 sigemptyset (&sigfd_set);
2796
2797 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2798 ev_set_priority (&sigfd_w, EV_MAXPRI);
2799 ev_io_start (EV_A_ &sigfd_w);
2800 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2801 }
2802 }
2803
2804 if (sigfd >= 0)
2805 {
2806 /* TODO: check .head */
2807 sigaddset (&sigfd_set, w->signum);
2808 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2809
2810 signalfd (sigfd, &sigfd_set, 0);
2811 }
2812#endif
2813
2814 ev_start (EV_A_ (W)w, 1);
2815 wlist_add (&signals [w->signum - 1].head, (WL)w);
2816
2817 if (!((WL)w)->next)
2818# if EV_USE_SIGNALFD
2819 if (sigfd < 0) /*TODO*/
2820# endif
2821 {
2822# ifdef _WIN32
2823 evpipe_init (EV_A);
2824
2825 signal (w->signum, ev_sighandler);
2826# else
2827 struct sigaction sa;
2828
2829 evpipe_init (EV_A);
2830
2831 sa.sa_handler = ev_sighandler;
2832 sigfillset (&sa.sa_mask);
2833 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2834 sigaction (w->signum, &sa, 0);
2835
2836 sigemptyset (&sa.sa_mask);
2837 sigaddset (&sa.sa_mask, w->signum);
2838 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2839#endif
2840 }
2841
2842 EV_FREQUENT_CHECK;
2843}
2844
2845void noinline
2846ev_signal_stop (EV_P_ ev_signal *w)
2847{
2848 clear_pending (EV_A_ (W)w);
2849 if (expect_false (!ev_is_active (w)))
2850 return;
2851
2852 EV_FREQUENT_CHECK;
2853
2854 wlist_del (&signals [w->signum - 1].head, (WL)w);
2855 ev_stop (EV_A_ (W)w);
2856
2857 if (!signals [w->signum - 1].head)
2858 {
2859#if EV_MULTIPLICITY
2860 signals [w->signum - 1].loop = 0; /* unattach from signal */
2861#endif
2862#if EV_USE_SIGNALFD
2863 if (sigfd >= 0)
2864 {
2865 sigset_t ss;
2866
2867 sigemptyset (&ss);
2868 sigaddset (&ss, w->signum);
2869 sigdelset (&sigfd_set, w->signum);
2870
2871 signalfd (sigfd, &sigfd_set, 0);
2872 sigprocmask (SIG_UNBLOCK, &ss, 0);
538 } 2873 }
539 else 2874 else
540 evperiodic_stop (w); /* nonrepeating: stop timer */ 2875#endif
541 2876 signal (w->signum, SIG_DFL);
542 event ((W)w, EV_TIMEOUT);
543 }
544}
545
546static void
547periodics_reschedule (ev_tstamp diff)
548{
549 int i;
550
551 /* adjust periodics after time jump */
552 for (i = 0; i < periodiccnt; ++i)
553 { 2877 }
554 struct ev_periodic *w = periodics [i];
555 2878
556 if (w->interval) 2879 EV_FREQUENT_CHECK;
2880}
2881
2882#endif
2883
2884#if EV_CHILD_ENABLE
2885
2886void
2887ev_child_start (EV_P_ ev_child *w)
2888{
2889#if EV_MULTIPLICITY
2890 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2891#endif
2892 if (expect_false (ev_is_active (w)))
2893 return;
2894
2895 EV_FREQUENT_CHECK;
2896
2897 ev_start (EV_A_ (W)w, 1);
2898 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2899
2900 EV_FREQUENT_CHECK;
2901}
2902
2903void
2904ev_child_stop (EV_P_ ev_child *w)
2905{
2906 clear_pending (EV_A_ (W)w);
2907 if (expect_false (!ev_is_active (w)))
2908 return;
2909
2910 EV_FREQUENT_CHECK;
2911
2912 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2913 ev_stop (EV_A_ (W)w);
2914
2915 EV_FREQUENT_CHECK;
2916}
2917
2918#endif
2919
2920#if EV_STAT_ENABLE
2921
2922# ifdef _WIN32
2923# undef lstat
2924# define lstat(a,b) _stati64 (a,b)
2925# endif
2926
2927#define DEF_STAT_INTERVAL 5.0074891
2928#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2929#define MIN_STAT_INTERVAL 0.1074891
2930
2931static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2932
2933#if EV_USE_INOTIFY
2934
2935/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2936# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2937
2938static void noinline
2939infy_add (EV_P_ ev_stat *w)
2940{
2941 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);
2942
2943 if (w->wd >= 0)
2944 {
2945 struct statfs sfs;
2946
2947 /* now local changes will be tracked by inotify, but remote changes won't */
2948 /* unless the filesystem is known to be local, we therefore still poll */
2949 /* also do poll on <2.6.25, but with normal frequency */
2950
2951 if (!fs_2625)
2952 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2953 else if (!statfs (w->path, &sfs)
2954 && (sfs.f_type == 0x1373 /* devfs */
2955 || sfs.f_type == 0xEF53 /* ext2/3 */
2956 || sfs.f_type == 0x3153464a /* jfs */
2957 || sfs.f_type == 0x52654973 /* reiser3 */
2958 || sfs.f_type == 0x01021994 /* tempfs */
2959 || sfs.f_type == 0x58465342 /* xfs */))
2960 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2961 else
2962 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2963 }
2964 else
2965 {
2966 /* can't use inotify, continue to stat */
2967 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2968
2969 /* if path is not there, monitor some parent directory for speedup hints */
2970 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2971 /* but an efficiency issue only */
2972 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
557 { 2973 {
558 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 2974 char path [4096];
2975 strcpy (path, w->path);
559 2976
560 if (fabs (diff) >= 1e-4) 2977 do
561 { 2978 {
562 evperiodic_stop (w); 2979 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
563 evperiodic_start (w); 2980 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
564 2981
565 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 2982 char *pend = strrchr (path, '/');
2983
2984 if (!pend || pend == path)
2985 break;
2986
2987 *pend = 0;
2988 w->wd = inotify_add_watch (fs_fd, path, mask);
2989 }
2990 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2991 }
2992 }
2993
2994 if (w->wd >= 0)
2995 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2996
2997 /* now re-arm timer, if required */
2998 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2999 ev_timer_again (EV_A_ &w->timer);
3000 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3001}
3002
3003static void noinline
3004infy_del (EV_P_ ev_stat *w)
3005{
3006 int slot;
3007 int wd = w->wd;
3008
3009 if (wd < 0)
3010 return;
3011
3012 w->wd = -2;
3013 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3014 wlist_del (&fs_hash [slot].head, (WL)w);
3015
3016 /* remove this watcher, if others are watching it, they will rearm */
3017 inotify_rm_watch (fs_fd, wd);
3018}
3019
3020static void noinline
3021infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3022{
3023 if (slot < 0)
3024 /* overflow, need to check for all hash slots */
3025 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3026 infy_wd (EV_A_ slot, wd, ev);
3027 else
3028 {
3029 WL w_;
3030
3031 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3032 {
3033 ev_stat *w = (ev_stat *)w_;
3034 w_ = w_->next; /* lets us remove this watcher and all before it */
3035
3036 if (w->wd == wd || wd == -1)
3037 {
3038 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3039 {
3040 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3041 w->wd = -1;
3042 infy_add (EV_A_ w); /* re-add, no matter what */
3043 }
3044
3045 stat_timer_cb (EV_A_ &w->timer, 0);
566 } 3046 }
567 } 3047 }
568 } 3048 }
569} 3049}
570 3050
571static void 3051static void
572time_update (void) 3052infy_cb (EV_P_ ev_io *w, int revents)
573{ 3053{
3054 char buf [EV_INOTIFY_BUFSIZE];
3055 int ofs;
3056 int len = read (fs_fd, buf, sizeof (buf));
3057
3058 for (ofs = 0; ofs < len; )
3059 {
3060 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3061 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3062 ofs += sizeof (struct inotify_event) + ev->len;
3063 }
3064}
3065
3066inline_size unsigned int
3067ev_linux_version (void)
3068{
3069 struct utsname buf;
3070 unsigned int v;
574 int i; 3071 int i;
3072 char *p = buf.release;
575 3073
576 ev_now = ev_time (); 3074 if (uname (&buf))
3075 return 0;
577 3076
578 if (have_monotonic) 3077 for (i = 3+1; --i; )
579 { 3078 {
580 ev_tstamp odiff = diff; 3079 unsigned int c = 0;
581 3080
582 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3081 for (;;)
583 { 3082 {
584 now = get_clock (); 3083 if (*p >= '0' && *p <= '9')
585 diff = ev_now - now; 3084 c = c * 10 + *p++ - '0';
586 3085 else
587 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3086 {
588 return; /* all is well */ 3087 p += *p == '.';
589 3088 break;
590 ev_now = ev_time (); 3089 }
591 } 3090 }
592 3091
593 periodics_reschedule (diff - odiff); 3092 v = (v << 8) | c;
594 /* no timer adjustment, as the monotonic clock doesn't jump */ 3093 }
3094
3095 return v;
3096}
3097
3098inline_size void
3099ev_check_2625 (EV_P)
3100{
3101 /* kernels < 2.6.25 are borked
3102 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3103 */
3104 if (ev_linux_version () < 0x020619)
3105 return;
3106
3107 fs_2625 = 1;
3108}
3109
3110inline_size int
3111infy_newfd (void)
3112{
3113#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3114 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3115 if (fd >= 0)
3116 return fd;
3117#endif
3118 return inotify_init ();
3119}
3120
3121inline_size void
3122infy_init (EV_P)
3123{
3124 if (fs_fd != -2)
3125 return;
3126
3127 fs_fd = -1;
3128
3129 ev_check_2625 (EV_A);
3130
3131 fs_fd = infy_newfd ();
3132
3133 if (fs_fd >= 0)
595 } 3134 {
3135 fd_intern (fs_fd);
3136 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3137 ev_set_priority (&fs_w, EV_MAXPRI);
3138 ev_io_start (EV_A_ &fs_w);
3139 ev_unref (EV_A);
3140 }
3141}
3142
3143inline_size void
3144infy_fork (EV_P)
3145{
3146 int slot;
3147
3148 if (fs_fd < 0)
3149 return;
3150
3151 ev_ref (EV_A);
3152 ev_io_stop (EV_A_ &fs_w);
3153 close (fs_fd);
3154 fs_fd = infy_newfd ();
3155
3156 if (fs_fd >= 0)
3157 {
3158 fd_intern (fs_fd);
3159 ev_io_set (&fs_w, fs_fd, EV_READ);
3160 ev_io_start (EV_A_ &fs_w);
3161 ev_unref (EV_A);
3162 }
3163
3164 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3165 {
3166 WL w_ = fs_hash [slot].head;
3167 fs_hash [slot].head = 0;
3168
3169 while (w_)
3170 {
3171 ev_stat *w = (ev_stat *)w_;
3172 w_ = w_->next; /* lets us add this watcher */
3173
3174 w->wd = -1;
3175
3176 if (fs_fd >= 0)
3177 infy_add (EV_A_ w); /* re-add, no matter what */
3178 else
3179 {
3180 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3181 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3182 ev_timer_again (EV_A_ &w->timer);
3183 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3184 }
3185 }
3186 }
3187}
3188
3189#endif
3190
3191#ifdef _WIN32
3192# define EV_LSTAT(p,b) _stati64 (p, b)
3193#else
3194# define EV_LSTAT(p,b) lstat (p, b)
3195#endif
3196
3197void
3198ev_stat_stat (EV_P_ ev_stat *w)
3199{
3200 if (lstat (w->path, &w->attr) < 0)
3201 w->attr.st_nlink = 0;
3202 else if (!w->attr.st_nlink)
3203 w->attr.st_nlink = 1;
3204}
3205
3206static void noinline
3207stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3208{
3209 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3210
3211 ev_statdata prev = w->attr;
3212 ev_stat_stat (EV_A_ w);
3213
3214 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3215 if (
3216 prev.st_dev != w->attr.st_dev
3217 || prev.st_ino != w->attr.st_ino
3218 || prev.st_mode != w->attr.st_mode
3219 || prev.st_nlink != w->attr.st_nlink
3220 || prev.st_uid != w->attr.st_uid
3221 || prev.st_gid != w->attr.st_gid
3222 || prev.st_rdev != w->attr.st_rdev
3223 || prev.st_size != w->attr.st_size
3224 || prev.st_atime != w->attr.st_atime
3225 || prev.st_mtime != w->attr.st_mtime
3226 || prev.st_ctime != w->attr.st_ctime
3227 ) {
3228 /* we only update w->prev on actual differences */
3229 /* in case we test more often than invoke the callback, */
3230 /* to ensure that prev is always different to attr */
3231 w->prev = prev;
3232
3233 #if EV_USE_INOTIFY
3234 if (fs_fd >= 0)
3235 {
3236 infy_del (EV_A_ w);
3237 infy_add (EV_A_ w);
3238 ev_stat_stat (EV_A_ w); /* avoid race... */
3239 }
3240 #endif
3241
3242 ev_feed_event (EV_A_ w, EV_STAT);
3243 }
3244}
3245
3246void
3247ev_stat_start (EV_P_ ev_stat *w)
3248{
3249 if (expect_false (ev_is_active (w)))
3250 return;
3251
3252 ev_stat_stat (EV_A_ w);
3253
3254 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3255 w->interval = MIN_STAT_INTERVAL;
3256
3257 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3258 ev_set_priority (&w->timer, ev_priority (w));
3259
3260#if EV_USE_INOTIFY
3261 infy_init (EV_A);
3262
3263 if (fs_fd >= 0)
3264 infy_add (EV_A_ w);
596 else 3265 else
3266#endif
3267 {
3268 ev_timer_again (EV_A_ &w->timer);
3269 ev_unref (EV_A);
597 { 3270 }
598 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3271
3272 ev_start (EV_A_ (W)w, 1);
3273
3274 EV_FREQUENT_CHECK;
3275}
3276
3277void
3278ev_stat_stop (EV_P_ ev_stat *w)
3279{
3280 clear_pending (EV_A_ (W)w);
3281 if (expect_false (!ev_is_active (w)))
3282 return;
3283
3284 EV_FREQUENT_CHECK;
3285
3286#if EV_USE_INOTIFY
3287 infy_del (EV_A_ w);
3288#endif
3289
3290 if (ev_is_active (&w->timer))
3291 {
3292 ev_ref (EV_A);
3293 ev_timer_stop (EV_A_ &w->timer);
3294 }
3295
3296 ev_stop (EV_A_ (W)w);
3297
3298 EV_FREQUENT_CHECK;
3299}
3300#endif
3301
3302#if EV_IDLE_ENABLE
3303void
3304ev_idle_start (EV_P_ ev_idle *w)
3305{
3306 if (expect_false (ev_is_active (w)))
3307 return;
3308
3309 pri_adjust (EV_A_ (W)w);
3310
3311 EV_FREQUENT_CHECK;
3312
3313 {
3314 int active = ++idlecnt [ABSPRI (w)];
3315
3316 ++idleall;
3317 ev_start (EV_A_ (W)w, active);
3318
3319 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3320 idles [ABSPRI (w)][active - 1] = w;
3321 }
3322
3323 EV_FREQUENT_CHECK;
3324}
3325
3326void
3327ev_idle_stop (EV_P_ ev_idle *w)
3328{
3329 clear_pending (EV_A_ (W)w);
3330 if (expect_false (!ev_is_active (w)))
3331 return;
3332
3333 EV_FREQUENT_CHECK;
3334
3335 {
3336 int active = ev_active (w);
3337
3338 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3339 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3340
3341 ev_stop (EV_A_ (W)w);
3342 --idleall;
3343 }
3344
3345 EV_FREQUENT_CHECK;
3346}
3347#endif
3348
3349#if EV_PREPARE_ENABLE
3350void
3351ev_prepare_start (EV_P_ ev_prepare *w)
3352{
3353 if (expect_false (ev_is_active (w)))
3354 return;
3355
3356 EV_FREQUENT_CHECK;
3357
3358 ev_start (EV_A_ (W)w, ++preparecnt);
3359 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3360 prepares [preparecnt - 1] = w;
3361
3362 EV_FREQUENT_CHECK;
3363}
3364
3365void
3366ev_prepare_stop (EV_P_ ev_prepare *w)
3367{
3368 clear_pending (EV_A_ (W)w);
3369 if (expect_false (!ev_is_active (w)))
3370 return;
3371
3372 EV_FREQUENT_CHECK;
3373
3374 {
3375 int active = ev_active (w);
3376
3377 prepares [active - 1] = prepares [--preparecnt];
3378 ev_active (prepares [active - 1]) = active;
3379 }
3380
3381 ev_stop (EV_A_ (W)w);
3382
3383 EV_FREQUENT_CHECK;
3384}
3385#endif
3386
3387#if EV_CHECK_ENABLE
3388void
3389ev_check_start (EV_P_ ev_check *w)
3390{
3391 if (expect_false (ev_is_active (w)))
3392 return;
3393
3394 EV_FREQUENT_CHECK;
3395
3396 ev_start (EV_A_ (W)w, ++checkcnt);
3397 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3398 checks [checkcnt - 1] = w;
3399
3400 EV_FREQUENT_CHECK;
3401}
3402
3403void
3404ev_check_stop (EV_P_ ev_check *w)
3405{
3406 clear_pending (EV_A_ (W)w);
3407 if (expect_false (!ev_is_active (w)))
3408 return;
3409
3410 EV_FREQUENT_CHECK;
3411
3412 {
3413 int active = ev_active (w);
3414
3415 checks [active - 1] = checks [--checkcnt];
3416 ev_active (checks [active - 1]) = active;
3417 }
3418
3419 ev_stop (EV_A_ (W)w);
3420
3421 EV_FREQUENT_CHECK;
3422}
3423#endif
3424
3425#if EV_EMBED_ENABLE
3426void noinline
3427ev_embed_sweep (EV_P_ ev_embed *w)
3428{
3429 ev_loop (w->other, EVLOOP_NONBLOCK);
3430}
3431
3432static void
3433embed_io_cb (EV_P_ ev_io *io, int revents)
3434{
3435 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3436
3437 if (ev_cb (w))
3438 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3439 else
3440 ev_loop (w->other, EVLOOP_NONBLOCK);
3441}
3442
3443static void
3444embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3445{
3446 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3447
3448 {
3449 EV_P = w->other;
3450
3451 while (fdchangecnt)
599 { 3452 {
600 periodics_reschedule (ev_now - now); 3453 fd_reify (EV_A);
601 3454 ev_loop (EV_A_ EVLOOP_NONBLOCK);
602 /* adjust timers. this is easy, as the offset is the same for all */
603 for (i = 0; i < timercnt; ++i)
604 timers [i]->at += diff;
605 } 3455 }
606
607 now = ev_now;
608 } 3456 }
609} 3457}
610 3458
611int ev_loop_done; 3459static void
612 3460embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
613void ev_loop (int flags)
614{ 3461{
615 double block; 3462 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
616 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
617 3463
618 do 3464 ev_embed_stop (EV_A_ w);
3465
619 { 3466 {
620 /* queue check watchers (and execute them) */ 3467 EV_P = w->other;
621 if (preparecnt)
622 {
623 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
624 call_pending ();
625 }
626 3468
627 /* update fd-related kernel structures */ 3469 ev_loop_fork (EV_A);
628 fd_reify (); 3470 ev_loop (EV_A_ EVLOOP_NONBLOCK);
629
630 /* calculate blocking time */
631
632 /* we only need this for !monotonic clockor timers, but as we basically
633 always have timers, we just calculate it always */
634 ev_now = ev_time ();
635
636 if (flags & EVLOOP_NONBLOCK || idlecnt)
637 block = 0.;
638 else
639 {
640 block = MAX_BLOCKTIME;
641
642 if (timercnt)
643 {
644 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
645 if (block > to) block = to;
646 }
647
648 if (periodiccnt)
649 {
650 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
651 if (block > to) block = to;
652 }
653
654 if (block < 0.) block = 0.;
655 }
656
657 method_poll (block);
658
659 /* update ev_now, do magic */
660 time_update ();
661
662 /* queue pending timers and reschedule them */
663 timers_reify (); /* relative timers called last */
664 periodics_reify (); /* absolute timers called first */
665
666 /* queue idle watchers unless io or timers are pending */
667 if (!pendingcnt)
668 queue_events ((W *)idles, idlecnt, EV_IDLE);
669
670 /* queue check watchers, to be executed first */
671 if (checkcnt)
672 queue_events ((W *)checks, checkcnt, EV_CHECK);
673
674 call_pending ();
675 } 3471 }
676 while (!ev_loop_done);
677 3472
678 if (ev_loop_done != 2) 3473 ev_embed_start (EV_A_ w);
679 ev_loop_done = 0;
680} 3474}
3475
3476#if 0
3477static void
3478embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3479{
3480 ev_idle_stop (EV_A_ idle);
3481}
3482#endif
3483
3484void
3485ev_embed_start (EV_P_ ev_embed *w)
3486{
3487 if (expect_false (ev_is_active (w)))
3488 return;
3489
3490 {
3491 EV_P = w->other;
3492 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3493 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3494 }
3495
3496 EV_FREQUENT_CHECK;
3497
3498 ev_set_priority (&w->io, ev_priority (w));
3499 ev_io_start (EV_A_ &w->io);
3500
3501 ev_prepare_init (&w->prepare, embed_prepare_cb);
3502 ev_set_priority (&w->prepare, EV_MINPRI);
3503 ev_prepare_start (EV_A_ &w->prepare);
3504
3505 ev_fork_init (&w->fork, embed_fork_cb);
3506 ev_fork_start (EV_A_ &w->fork);
3507
3508 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3509
3510 ev_start (EV_A_ (W)w, 1);
3511
3512 EV_FREQUENT_CHECK;
3513}
3514
3515void
3516ev_embed_stop (EV_P_ ev_embed *w)
3517{
3518 clear_pending (EV_A_ (W)w);
3519 if (expect_false (!ev_is_active (w)))
3520 return;
3521
3522 EV_FREQUENT_CHECK;
3523
3524 ev_io_stop (EV_A_ &w->io);
3525 ev_prepare_stop (EV_A_ &w->prepare);
3526 ev_fork_stop (EV_A_ &w->fork);
3527
3528 ev_stop (EV_A_ (W)w);
3529
3530 EV_FREQUENT_CHECK;
3531}
3532#endif
3533
3534#if EV_FORK_ENABLE
3535void
3536ev_fork_start (EV_P_ ev_fork *w)
3537{
3538 if (expect_false (ev_is_active (w)))
3539 return;
3540
3541 EV_FREQUENT_CHECK;
3542
3543 ev_start (EV_A_ (W)w, ++forkcnt);
3544 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3545 forks [forkcnt - 1] = w;
3546
3547 EV_FREQUENT_CHECK;
3548}
3549
3550void
3551ev_fork_stop (EV_P_ ev_fork *w)
3552{
3553 clear_pending (EV_A_ (W)w);
3554 if (expect_false (!ev_is_active (w)))
3555 return;
3556
3557 EV_FREQUENT_CHECK;
3558
3559 {
3560 int active = ev_active (w);
3561
3562 forks [active - 1] = forks [--forkcnt];
3563 ev_active (forks [active - 1]) = active;
3564 }
3565
3566 ev_stop (EV_A_ (W)w);
3567
3568 EV_FREQUENT_CHECK;
3569}
3570#endif
3571
3572#if EV_ASYNC_ENABLE
3573void
3574ev_async_start (EV_P_ ev_async *w)
3575{
3576 if (expect_false (ev_is_active (w)))
3577 return;
3578
3579 evpipe_init (EV_A);
3580
3581 EV_FREQUENT_CHECK;
3582
3583 ev_start (EV_A_ (W)w, ++asynccnt);
3584 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3585 asyncs [asynccnt - 1] = w;
3586
3587 EV_FREQUENT_CHECK;
3588}
3589
3590void
3591ev_async_stop (EV_P_ ev_async *w)
3592{
3593 clear_pending (EV_A_ (W)w);
3594 if (expect_false (!ev_is_active (w)))
3595 return;
3596
3597 EV_FREQUENT_CHECK;
3598
3599 {
3600 int active = ev_active (w);
3601
3602 asyncs [active - 1] = asyncs [--asynccnt];
3603 ev_active (asyncs [active - 1]) = active;
3604 }
3605
3606 ev_stop (EV_A_ (W)w);
3607
3608 EV_FREQUENT_CHECK;
3609}
3610
3611void
3612ev_async_send (EV_P_ ev_async *w)
3613{
3614 w->sent = 1;
3615 evpipe_write (EV_A_ &async_pending);
3616}
3617#endif
681 3618
682/*****************************************************************************/ 3619/*****************************************************************************/
683 3620
684static void
685wlist_add (WL *head, WL elem)
686{
687 elem->next = *head;
688 *head = elem;
689}
690
691static void
692wlist_del (WL *head, WL elem)
693{
694 while (*head)
695 {
696 if (*head == elem)
697 {
698 *head = elem->next;
699 return;
700 }
701
702 head = &(*head)->next;
703 }
704}
705
706static void
707ev_clear (W w)
708{
709 if (w->pending)
710 {
711 pendings [w->pending - 1].w = 0;
712 w->pending = 0;
713 }
714}
715
716static void
717ev_start (W w, int active)
718{
719 w->active = active;
720}
721
722static void
723ev_stop (W w)
724{
725 w->active = 0;
726}
727
728/*****************************************************************************/
729
730void
731evio_start (struct ev_io *w)
732{
733 if (ev_is_active (w))
734 return;
735
736 int fd = w->fd;
737
738 ev_start ((W)w, 1);
739 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740 wlist_add ((WL *)&anfds[fd].head, (WL)w);
741
742 ++fdchangecnt;
743 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744 fdchanges [fdchangecnt - 1] = fd;
745
746 if (w->fd == 9)
747 printf ("start %p:%x\n", w, w->events);//D
748}
749
750void
751evio_stop (struct ev_io *w)
752{
753 if (w->fd == 9)
754 printf ("stop %p:%x\n", w, w->events);//D
755 ev_clear ((W)w);
756 if (!ev_is_active (w))
757 return;
758
759 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760 ev_stop ((W)w);
761
762 ++fdchangecnt;
763 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764 fdchanges [fdchangecnt - 1] = w->fd;
765}
766
767void
768evtimer_start (struct ev_timer *w)
769{
770 if (ev_is_active (w))
771 return;
772
773 w->at += now;
774
775 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
776
777 ev_start ((W)w, ++timercnt);
778 array_needsize (timers, timermax, timercnt, );
779 timers [timercnt - 1] = w;
780 upheap ((WT *)timers, timercnt - 1);
781}
782
783void
784evtimer_stop (struct ev_timer *w)
785{
786 ev_clear ((W)w);
787 if (!ev_is_active (w))
788 return;
789
790 if (w->active < timercnt--)
791 {
792 timers [w->active - 1] = timers [timercnt];
793 downheap ((WT *)timers, timercnt, w->active - 1);
794 }
795
796 w->at = w->repeat;
797
798 ev_stop ((W)w);
799}
800
801void
802evtimer_again (struct ev_timer *w)
803{
804 if (ev_is_active (w))
805 {
806 if (w->repeat)
807 {
808 w->at = now + w->repeat;
809 downheap ((WT *)timers, timercnt, w->active - 1);
810 }
811 else
812 evtimer_stop (w);
813 }
814 else if (w->repeat)
815 evtimer_start (w);
816}
817
818void
819evperiodic_start (struct ev_periodic *w)
820{
821 if (ev_is_active (w))
822 return;
823
824 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
825
826 /* this formula differs from the one in periodic_reify because we do not always round up */
827 if (w->interval)
828 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
829
830 ev_start ((W)w, ++periodiccnt);
831 array_needsize (periodics, periodicmax, periodiccnt, );
832 periodics [periodiccnt - 1] = w;
833 upheap ((WT *)periodics, periodiccnt - 1);
834}
835
836void
837evperiodic_stop (struct ev_periodic *w)
838{
839 ev_clear ((W)w);
840 if (!ev_is_active (w))
841 return;
842
843 if (w->active < periodiccnt--)
844 {
845 periodics [w->active - 1] = periodics [periodiccnt];
846 downheap ((WT *)periodics, periodiccnt, w->active - 1);
847 }
848
849 ev_stop ((W)w);
850}
851
852void
853evsignal_start (struct ev_signal *w)
854{
855 if (ev_is_active (w))
856 return;
857
858 ev_start ((W)w, 1);
859 array_needsize (signals, signalmax, w->signum, signals_init);
860 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861
862 if (!w->next)
863 {
864 struct sigaction sa;
865 sa.sa_handler = sighandler;
866 sigfillset (&sa.sa_mask);
867 sa.sa_flags = 0;
868 sigaction (w->signum, &sa, 0);
869 }
870}
871
872void
873evsignal_stop (struct ev_signal *w)
874{
875 ev_clear ((W)w);
876 if (!ev_is_active (w))
877 return;
878
879 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880 ev_stop ((W)w);
881
882 if (!signals [w->signum - 1].head)
883 signal (w->signum, SIG_DFL);
884}
885
886void evidle_start (struct ev_idle *w)
887{
888 if (ev_is_active (w))
889 return;
890
891 ev_start ((W)w, ++idlecnt);
892 array_needsize (idles, idlemax, idlecnt, );
893 idles [idlecnt - 1] = w;
894}
895
896void evidle_stop (struct ev_idle *w)
897{
898 ev_clear ((W)w);
899 if (ev_is_active (w))
900 return;
901
902 idles [w->active - 1] = idles [--idlecnt];
903 ev_stop ((W)w);
904}
905
906void evprepare_start (struct ev_prepare *w)
907{
908 if (ev_is_active (w))
909 return;
910
911 ev_start ((W)w, ++preparecnt);
912 array_needsize (prepares, preparemax, preparecnt, );
913 prepares [preparecnt - 1] = w;
914}
915
916void evprepare_stop (struct ev_prepare *w)
917{
918 ev_clear ((W)w);
919 if (ev_is_active (w))
920 return;
921
922 prepares [w->active - 1] = prepares [--preparecnt];
923 ev_stop ((W)w);
924}
925
926void evcheck_start (struct ev_check *w)
927{
928 if (ev_is_active (w))
929 return;
930
931 ev_start ((W)w, ++checkcnt);
932 array_needsize (checks, checkmax, checkcnt, );
933 checks [checkcnt - 1] = w;
934}
935
936void evcheck_stop (struct ev_check *w)
937{
938 ev_clear ((W)w);
939 if (ev_is_active (w))
940 return;
941
942 checks [w->active - 1] = checks [--checkcnt];
943 ev_stop ((W)w);
944}
945
946void evchild_start (struct ev_child *w)
947{
948 if (ev_is_active (w))
949 return;
950
951 ev_start ((W)w, 1);
952 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953}
954
955void evchild_stop (struct ev_child *w)
956{
957 ev_clear ((W)w);
958 if (ev_is_active (w))
959 return;
960
961 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962 ev_stop ((W)w);
963}
964
965/*****************************************************************************/
966
967struct ev_once 3621struct ev_once
968{ 3622{
969 struct ev_io io; 3623 ev_io io;
970 struct ev_timer to; 3624 ev_timer to;
971 void (*cb)(int revents, void *arg); 3625 void (*cb)(int revents, void *arg);
972 void *arg; 3626 void *arg;
973}; 3627};
974 3628
975static void 3629static void
976once_cb (struct ev_once *once, int revents) 3630once_cb (EV_P_ struct ev_once *once, int revents)
977{ 3631{
978 void (*cb)(int revents, void *arg) = once->cb; 3632 void (*cb)(int revents, void *arg) = once->cb;
979 void *arg = once->arg; 3633 void *arg = once->arg;
980 3634
981 evio_stop (&once->io); 3635 ev_io_stop (EV_A_ &once->io);
982 evtimer_stop (&once->to); 3636 ev_timer_stop (EV_A_ &once->to);
983 free (once); 3637 ev_free (once);
984 3638
985 cb (revents, arg); 3639 cb (revents, arg);
986} 3640}
987 3641
988static void 3642static void
989once_cb_io (struct ev_io *w, int revents) 3643once_cb_io (EV_P_ ev_io *w, int revents)
990{ 3644{
991 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3645 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3646
3647 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
992} 3648}
993 3649
994static void 3650static void
995once_cb_to (struct ev_timer *w, int revents) 3651once_cb_to (EV_P_ ev_timer *w, int revents)
996{ 3652{
997 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3653 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
998}
999 3654
3655 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3656}
3657
1000void 3658void
1001ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3659ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002{ 3660{
1003 struct ev_once *once = malloc (sizeof (struct ev_once)); 3661 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1004 3662
1005 if (!once) 3663 if (expect_false (!once))
1006 cb (EV_ERROR, arg); 3664 {
1007 else 3665 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3666 return;
1008 { 3667 }
3668
1009 once->cb = cb; 3669 once->cb = cb;
1010 once->arg = arg; 3670 once->arg = arg;
1011 3671
1012 evw_init (&once->io, once_cb_io); 3672 ev_init (&once->io, once_cb_io);
1013
1014 if (fd >= 0) 3673 if (fd >= 0)
3674 {
3675 ev_io_set (&once->io, fd, events);
3676 ev_io_start (EV_A_ &once->io);
3677 }
3678
3679 ev_init (&once->to, once_cb_to);
3680 if (timeout >= 0.)
3681 {
3682 ev_timer_set (&once->to, timeout, 0.);
3683 ev_timer_start (EV_A_ &once->to);
3684 }
3685}
3686
3687/*****************************************************************************/
3688
3689#if EV_WALK_ENABLE
3690void
3691ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3692{
3693 int i, j;
3694 ev_watcher_list *wl, *wn;
3695
3696 if (types & (EV_IO | EV_EMBED))
3697 for (i = 0; i < anfdmax; ++i)
3698 for (wl = anfds [i].head; wl; )
1015 { 3699 {
1016 evio_set (&once->io, fd, events); 3700 wn = wl->next;
1017 evio_start (&once->io); 3701
3702#if EV_EMBED_ENABLE
3703 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3704 {
3705 if (types & EV_EMBED)
3706 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3707 }
3708 else
3709#endif
3710#if EV_USE_INOTIFY
3711 if (ev_cb ((ev_io *)wl) == infy_cb)
3712 ;
3713 else
3714#endif
3715 if ((ev_io *)wl != &pipe_w)
3716 if (types & EV_IO)
3717 cb (EV_A_ EV_IO, wl);
3718
3719 wl = wn;
1018 } 3720 }
1019 3721
1020 evw_init (&once->to, once_cb_to); 3722 if (types & (EV_TIMER | EV_STAT))
1021 3723 for (i = timercnt + HEAP0; i-- > HEAP0; )
1022 if (timeout >= 0.) 3724#if EV_STAT_ENABLE
3725 /*TODO: timer is not always active*/
3726 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1023 { 3727 {
1024 evtimer_set (&once->to, timeout, 0.); 3728 if (types & EV_STAT)
1025 evtimer_start (&once->to); 3729 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1026 } 3730 }
1027 } 3731 else
1028} 3732#endif
3733 if (types & EV_TIMER)
3734 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1029 3735
1030/*****************************************************************************/ 3736#if EV_PERIODIC_ENABLE
3737 if (types & EV_PERIODIC)
3738 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3739 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3740#endif
1031 3741
1032#if 0 3742#if EV_IDLE_ENABLE
3743 if (types & EV_IDLE)
3744 for (j = NUMPRI; i--; )
3745 for (i = idlecnt [j]; i--; )
3746 cb (EV_A_ EV_IDLE, idles [j][i]);
3747#endif
1033 3748
1034struct ev_io wio; 3749#if EV_FORK_ENABLE
3750 if (types & EV_FORK)
3751 for (i = forkcnt; i--; )
3752 if (ev_cb (forks [i]) != embed_fork_cb)
3753 cb (EV_A_ EV_FORK, forks [i]);
3754#endif
1035 3755
1036static void 3756#if EV_ASYNC_ENABLE
1037sin_cb (struct ev_io *w, int revents) 3757 if (types & EV_ASYNC)
1038{ 3758 for (i = asynccnt; i--; )
1039 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3759 cb (EV_A_ EV_ASYNC, asyncs [i]);
1040} 3760#endif
1041 3761
1042static void 3762#if EV_PREPARE_ENABLE
1043ocb (struct ev_timer *w, int revents) 3763 if (types & EV_PREPARE)
1044{ 3764 for (i = preparecnt; i--; )
1045 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3765# if EV_EMBED_ENABLE
1046 evtimer_stop (w); 3766 if (ev_cb (prepares [i]) != embed_prepare_cb)
1047 evtimer_start (w);
1048}
1049
1050static void
1051scb (struct ev_signal *w, int revents)
1052{
1053 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054 evio_stop (&wio);
1055 evio_start (&wio);
1056}
1057
1058static void
1059gcb (struct ev_signal *w, int revents)
1060{
1061 fprintf (stderr, "generic %x\n", revents);
1062
1063}
1064
1065int main (void)
1066{
1067 ev_init (0);
1068
1069 evio_init (&wio, sin_cb, 0, EV_READ);
1070 evio_start (&wio);
1071
1072 struct ev_timer t[10000];
1073
1074#if 0
1075 int i;
1076 for (i = 0; i < 10000; ++i)
1077 {
1078 struct ev_timer *w = t + i;
1079 evw_init (w, ocb, i);
1080 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081 evtimer_start (w);
1082 if (drand48 () < 0.5)
1083 evtimer_stop (w);
1084 }
1085#endif 3767# endif
1086 3768 cb (EV_A_ EV_PREPARE, prepares [i]);
1087 struct ev_timer t1;
1088 evtimer_init (&t1, ocb, 5, 10);
1089 evtimer_start (&t1);
1090
1091 struct ev_signal sig;
1092 evsignal_init (&sig, scb, SIGQUIT);
1093 evsignal_start (&sig);
1094
1095 struct ev_check cw;
1096 evcheck_init (&cw, gcb);
1097 evcheck_start (&cw);
1098
1099 struct ev_idle iw;
1100 evidle_init (&iw, gcb);
1101 evidle_start (&iw);
1102
1103 ev_loop (0);
1104
1105 return 0;
1106}
1107
1108#endif 3769#endif
1109 3770
3771#if EV_CHECK_ENABLE
3772 if (types & EV_CHECK)
3773 for (i = checkcnt; i--; )
3774 cb (EV_A_ EV_CHECK, checks [i]);
3775#endif
1110 3776
3777#if EV_SIGNAL_ENABLE
3778 if (types & EV_SIGNAL)
3779 for (i = 0; i < EV_NSIG - 1; ++i)
3780 for (wl = signals [i].head; wl; )
3781 {
3782 wn = wl->next;
3783 cb (EV_A_ EV_SIGNAL, wl);
3784 wl = wn;
3785 }
3786#endif
1111 3787
3788#if EV_CHILD_ENABLE
3789 if (types & EV_CHILD)
3790 for (i = (EV_PID_HASHSIZE); i--; )
3791 for (wl = childs [i]; wl; )
3792 {
3793 wn = wl->next;
3794 cb (EV_A_ EV_CHILD, wl);
3795 wl = wn;
3796 }
3797#endif
3798/* EV_STAT 0x00001000 /* stat data changed */
3799/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3800}
3801#endif
1112 3802
3803#if EV_MULTIPLICITY
3804 #include "ev_wrap.h"
3805#endif
3806
3807#ifdef __cplusplus
3808}
3809#endif
3810

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines