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/cvs/libev/ev.c
Revision: 1.330
Committed: Tue Mar 9 08:46:17 2010 UTC (14 years, 4 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.329: +47 -13 lines
Log Message:
ev_avoid_stdio

File Contents

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