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/cvs/libev/ev.c
Revision: 1.331
Committed: Tue Mar 9 08:55:03 2010 UTC (14 years, 4 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.330: +16 -7 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 # undef EV_AVOID_STDIO
190 #endif
191
192 /* this block tries to deduce configuration from header-defined symbols and defaults */
193
194 /* try to deduce the maximum number of signals on this platform */
195 #if defined (EV_NSIG)
196 /* use what's provided */
197 #elif defined (NSIG)
198 # define EV_NSIG (NSIG)
199 #elif defined(_NSIG)
200 # define EV_NSIG (_NSIG)
201 #elif defined (SIGMAX)
202 # define EV_NSIG (SIGMAX+1)
203 #elif defined (SIG_MAX)
204 # define EV_NSIG (SIG_MAX+1)
205 #elif defined (_SIG_MAX)
206 # define EV_NSIG (_SIG_MAX+1)
207 #elif defined (MAXSIG)
208 # define EV_NSIG (MAXSIG+1)
209 #elif defined (MAX_SIG)
210 # define EV_NSIG (MAX_SIG+1)
211 #elif defined (SIGARRAYSIZE)
212 # define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
213 #elif defined (_sys_nsig)
214 # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215 #else
216 # error "unable to find value for NSIG, please report"
217 /* to make it compile regardless, just remove the above line */
218 # define EV_NSIG 65
219 #endif
220
221 #ifndef EV_USE_CLOCK_SYSCALL
222 # if __linux && __GLIBC__ >= 2
223 # define EV_USE_CLOCK_SYSCALL 1
224 # else
225 # define EV_USE_CLOCK_SYSCALL 0
226 # endif
227 #endif
228
229 #ifndef EV_USE_MONOTONIC
230 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
231 # define EV_USE_MONOTONIC 1
232 # else
233 # define EV_USE_MONOTONIC 0
234 # endif
235 #endif
236
237 #ifndef EV_USE_REALTIME
238 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
239 #endif
240
241 #ifndef EV_USE_NANOSLEEP
242 # if _POSIX_C_SOURCE >= 199309L
243 # define EV_USE_NANOSLEEP 1
244 # else
245 # define EV_USE_NANOSLEEP 0
246 # endif
247 #endif
248
249 #ifndef EV_USE_SELECT
250 # define EV_USE_SELECT 1
251 #endif
252
253 #ifndef EV_USE_POLL
254 # ifdef _WIN32
255 # define EV_USE_POLL 0
256 # else
257 # define EV_USE_POLL 1
258 # endif
259 #endif
260
261 #ifndef EV_USE_EPOLL
262 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
263 # define EV_USE_EPOLL 1
264 # else
265 # define EV_USE_EPOLL 0
266 # endif
267 #endif
268
269 #ifndef EV_USE_KQUEUE
270 # define EV_USE_KQUEUE 0
271 #endif
272
273 #ifndef EV_USE_PORT
274 # define EV_USE_PORT 0
275 #endif
276
277 #ifndef EV_USE_INOTIFY
278 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279 # define EV_USE_INOTIFY 1
280 # else
281 # define EV_USE_INOTIFY 0
282 # endif
283 #endif
284
285 #ifndef EV_PID_HASHSIZE
286 # if EV_MINIMAL
287 # define EV_PID_HASHSIZE 1
288 # else
289 # define EV_PID_HASHSIZE 16
290 # endif
291 #endif
292
293 #ifndef EV_INOTIFY_HASHSIZE
294 # if EV_MINIMAL
295 # define EV_INOTIFY_HASHSIZE 1
296 # else
297 # define EV_INOTIFY_HASHSIZE 16
298 # endif
299 #endif
300
301 #ifndef EV_USE_EVENTFD
302 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
303 # define EV_USE_EVENTFD 1
304 # else
305 # define EV_USE_EVENTFD 0
306 # endif
307 #endif
308
309 #ifndef EV_USE_SIGNALFD
310 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311 # define EV_USE_SIGNALFD 1
312 # else
313 # define EV_USE_SIGNALFD 0
314 # endif
315 #endif
316
317 #if 0 /* debugging */
318 # define EV_VERIFY 3
319 # define EV_USE_4HEAP 1
320 # define EV_HEAP_CACHE_AT 1
321 #endif
322
323 #ifndef EV_VERIFY
324 # define EV_VERIFY !EV_MINIMAL
325 #endif
326
327 #ifndef EV_USE_4HEAP
328 # define EV_USE_4HEAP !EV_MINIMAL
329 #endif
330
331 #ifndef EV_HEAP_CACHE_AT
332 # define EV_HEAP_CACHE_AT !EV_MINIMAL
333 #endif
334
335 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
336 /* which makes programs even slower. might work on other unices, too. */
337 #if EV_USE_CLOCK_SYSCALL
338 # include <syscall.h>
339 # ifdef SYS_clock_gettime
340 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
341 # undef EV_USE_MONOTONIC
342 # define EV_USE_MONOTONIC 1
343 # else
344 # undef EV_USE_CLOCK_SYSCALL
345 # define EV_USE_CLOCK_SYSCALL 0
346 # endif
347 #endif
348
349 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
350
351 #ifdef _AIX
352 /* AIX has a completely broken poll.h header */
353 # undef EV_USE_POLL
354 # define EV_USE_POLL 0
355 #endif
356
357 #ifndef CLOCK_MONOTONIC
358 # undef EV_USE_MONOTONIC
359 # define EV_USE_MONOTONIC 0
360 #endif
361
362 #ifndef CLOCK_REALTIME
363 # undef EV_USE_REALTIME
364 # define EV_USE_REALTIME 0
365 #endif
366
367 #if !EV_STAT_ENABLE
368 # undef EV_USE_INOTIFY
369 # define EV_USE_INOTIFY 0
370 #endif
371
372 #if !EV_USE_NANOSLEEP
373 # ifndef _WIN32
374 # include <sys/select.h>
375 # endif
376 #endif
377
378 #if EV_USE_INOTIFY
379 # include <sys/utsname.h>
380 # include <sys/statfs.h>
381 # include <sys/inotify.h>
382 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
383 # ifndef IN_DONT_FOLLOW
384 # undef EV_USE_INOTIFY
385 # define EV_USE_INOTIFY 0
386 # endif
387 #endif
388
389 #if EV_SELECT_IS_WINSOCKET
390 # include <winsock.h>
391 #endif
392
393 #if EV_USE_EVENTFD
394 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
395 # include <stdint.h>
396 # ifndef EFD_NONBLOCK
397 # define EFD_NONBLOCK O_NONBLOCK
398 # endif
399 # ifndef EFD_CLOEXEC
400 # ifdef O_CLOEXEC
401 # define EFD_CLOEXEC O_CLOEXEC
402 # else
403 # define EFD_CLOEXEC 02000000
404 # endif
405 # endif
406 # ifdef __cplusplus
407 extern "C" {
408 # endif
409 int (eventfd) (unsigned int initval, int flags);
410 # ifdef __cplusplus
411 }
412 # endif
413 #endif
414
415 #if EV_USE_SIGNALFD
416 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
417 # include <stdint.h>
418 # ifndef SFD_NONBLOCK
419 # define SFD_NONBLOCK O_NONBLOCK
420 # endif
421 # ifndef SFD_CLOEXEC
422 # ifdef O_CLOEXEC
423 # define SFD_CLOEXEC O_CLOEXEC
424 # else
425 # define SFD_CLOEXEC 02000000
426 # endif
427 # endif
428 # ifdef __cplusplus
429 extern "C" {
430 # endif
431 int signalfd (int fd, const sigset_t *mask, int flags);
432
433 struct signalfd_siginfo
434 {
435 uint32_t ssi_signo;
436 char pad[128 - sizeof (uint32_t)];
437 };
438 # ifdef __cplusplus
439 }
440 # endif
441 #endif
442
443
444 /**/
445
446 #if EV_VERIFY >= 3
447 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
448 #else
449 # define EV_FREQUENT_CHECK do { } while (0)
450 #endif
451
452 /*
453 * This is used to avoid floating point rounding problems.
454 * It is added to ev_rt_now when scheduling periodics
455 * to ensure progress, time-wise, even when rounding
456 * errors are against us.
457 * This value is good at least till the year 4000.
458 * Better solutions welcome.
459 */
460 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
461
462 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
463 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
464
465 #if __GNUC__ >= 4
466 # define expect(expr,value) __builtin_expect ((expr),(value))
467 # define noinline __attribute__ ((noinline))
468 #else
469 # define expect(expr,value) (expr)
470 # define noinline
471 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
472 # define inline
473 # endif
474 #endif
475
476 #define expect_false(expr) expect ((expr) != 0, 0)
477 #define expect_true(expr) expect ((expr) != 0, 1)
478 #define inline_size static inline
479
480 #if EV_MINIMAL
481 # define inline_speed static noinline
482 #else
483 # define inline_speed static inline
484 #endif
485
486 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
487
488 #if EV_MINPRI == EV_MAXPRI
489 # define ABSPRI(w) (((W)w), 0)
490 #else
491 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
492 #endif
493
494 #define EMPTY /* required for microsofts broken pseudo-c compiler */
495 #define EMPTY2(a,b) /* used to suppress some warnings */
496
497 typedef ev_watcher *W;
498 typedef ev_watcher_list *WL;
499 typedef ev_watcher_time *WT;
500
501 #define ev_active(w) ((W)(w))->active
502 #define ev_at(w) ((WT)(w))->at
503
504 #if EV_USE_REALTIME
505 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
506 /* giving it a reasonably high chance of working on typical architetcures */
507 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
508 #endif
509
510 #if EV_USE_MONOTONIC
511 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
512 #endif
513
514 #ifndef EV_FD_TO_WIN32_HANDLE
515 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
516 #endif
517 #ifndef EV_WIN32_HANDLE_TO_FD
518 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
519 #endif
520 #ifndef EV_WIN32_CLOSE_FD
521 # define EV_WIN32_CLOSE_FD(fd) close (fd)
522 #endif
523
524 #ifdef _WIN32
525 # include "ev_win32.c"
526 #endif
527
528 /*****************************************************************************/
529
530 #if EV_AVOID_STDIO
531 static void noinline
532 ev_printerr (const char *msg)
533 {
534 write (STDERR_FILENO, msg, strlen (msg));
535 }
536 #endif
537
538 static void (*syserr_cb)(const char *msg);
539
540 void
541 ev_set_syserr_cb (void (*cb)(const char *msg))
542 {
543 syserr_cb = cb;
544 }
545
546 static void noinline
547 ev_syserr (const char *msg)
548 {
549 if (!msg)
550 msg = "(libev) system error";
551
552 if (syserr_cb)
553 syserr_cb (msg);
554 else
555 {
556 #if EV_AVOID_STDIO
557 const char *err = strerror (errno);
558
559 ev_printerr (msg);
560 ev_printerr (": ");
561 ev_printerr (err);
562 ev_printerr ("\n");
563 #else
564 perror (msg);
565 #endif
566 abort ();
567 }
568 }
569
570 static void *
571 ev_realloc_emul (void *ptr, long size)
572 {
573 /* some systems, notably openbsd and darwin, fail to properly
574 * implement realloc (x, 0) (as required by both ansi c-98 and
575 * the single unix specification, so work around them here.
576 */
577
578 if (size)
579 return realloc (ptr, size);
580
581 free (ptr);
582 return 0;
583 }
584
585 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
586
587 void
588 ev_set_allocator (void *(*cb)(void *ptr, long size))
589 {
590 alloc = cb;
591 }
592
593 inline_speed void *
594 ev_realloc (void *ptr, long size)
595 {
596 ptr = alloc (ptr, size);
597
598 if (!ptr && size)
599 {
600 #if EV_AVOID_STDIO
601 ev_printerr ("libev: memory allocation failed, aborting.\n");
602 #else
603 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
604 #endif
605 abort ();
606 }
607
608 return ptr;
609 }
610
611 #define ev_malloc(size) ev_realloc (0, (size))
612 #define ev_free(ptr) ev_realloc ((ptr), 0)
613
614 /*****************************************************************************/
615
616 /* set in reify when reification needed */
617 #define EV_ANFD_REIFY 1
618
619 /* file descriptor info structure */
620 typedef struct
621 {
622 WL head;
623 unsigned char events; /* the events watched for */
624 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
625 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
626 unsigned char unused;
627 #if EV_USE_EPOLL
628 unsigned int egen; /* generation counter to counter epoll bugs */
629 #endif
630 #if EV_SELECT_IS_WINSOCKET
631 SOCKET handle;
632 #endif
633 } ANFD;
634
635 /* stores the pending event set for a given watcher */
636 typedef struct
637 {
638 W w;
639 int events; /* the pending event set for the given watcher */
640 } ANPENDING;
641
642 #if EV_USE_INOTIFY
643 /* hash table entry per inotify-id */
644 typedef struct
645 {
646 WL head;
647 } ANFS;
648 #endif
649
650 /* Heap Entry */
651 #if EV_HEAP_CACHE_AT
652 /* a heap element */
653 typedef struct {
654 ev_tstamp at;
655 WT w;
656 } ANHE;
657
658 #define ANHE_w(he) (he).w /* access watcher, read-write */
659 #define ANHE_at(he) (he).at /* access cached at, read-only */
660 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
661 #else
662 /* a heap element */
663 typedef WT ANHE;
664
665 #define ANHE_w(he) (he)
666 #define ANHE_at(he) (he)->at
667 #define ANHE_at_cache(he)
668 #endif
669
670 #if EV_MULTIPLICITY
671
672 struct ev_loop
673 {
674 ev_tstamp ev_rt_now;
675 #define ev_rt_now ((loop)->ev_rt_now)
676 #define VAR(name,decl) decl;
677 #include "ev_vars.h"
678 #undef VAR
679 };
680 #include "ev_wrap.h"
681
682 static struct ev_loop default_loop_struct;
683 struct ev_loop *ev_default_loop_ptr;
684
685 #else
686
687 ev_tstamp ev_rt_now;
688 #define VAR(name,decl) static decl;
689 #include "ev_vars.h"
690 #undef VAR
691
692 static int ev_default_loop_ptr;
693
694 #endif
695
696 #if EV_MINIMAL < 2
697 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
698 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
699 # define EV_INVOKE_PENDING invoke_cb (EV_A)
700 #else
701 # define EV_RELEASE_CB (void)0
702 # define EV_ACQUIRE_CB (void)0
703 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
704 #endif
705
706 #define EVUNLOOP_RECURSE 0x80
707
708 /*****************************************************************************/
709
710 #ifndef EV_HAVE_EV_TIME
711 ev_tstamp
712 ev_time (void)
713 {
714 #if EV_USE_REALTIME
715 if (expect_true (have_realtime))
716 {
717 struct timespec ts;
718 clock_gettime (CLOCK_REALTIME, &ts);
719 return ts.tv_sec + ts.tv_nsec * 1e-9;
720 }
721 #endif
722
723 struct timeval tv;
724 gettimeofday (&tv, 0);
725 return tv.tv_sec + tv.tv_usec * 1e-6;
726 }
727 #endif
728
729 inline_size ev_tstamp
730 get_clock (void)
731 {
732 #if EV_USE_MONOTONIC
733 if (expect_true (have_monotonic))
734 {
735 struct timespec ts;
736 clock_gettime (CLOCK_MONOTONIC, &ts);
737 return ts.tv_sec + ts.tv_nsec * 1e-9;
738 }
739 #endif
740
741 return ev_time ();
742 }
743
744 #if EV_MULTIPLICITY
745 ev_tstamp
746 ev_now (EV_P)
747 {
748 return ev_rt_now;
749 }
750 #endif
751
752 void
753 ev_sleep (ev_tstamp delay)
754 {
755 if (delay > 0.)
756 {
757 #if EV_USE_NANOSLEEP
758 struct timespec ts;
759
760 ts.tv_sec = (time_t)delay;
761 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
762
763 nanosleep (&ts, 0);
764 #elif defined(_WIN32)
765 Sleep ((unsigned long)(delay * 1e3));
766 #else
767 struct timeval tv;
768
769 tv.tv_sec = (time_t)delay;
770 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
771
772 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
773 /* something not guaranteed by newer posix versions, but guaranteed */
774 /* by older ones */
775 select (0, 0, 0, 0, &tv);
776 #endif
777 }
778 }
779
780 /*****************************************************************************/
781
782 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
783
784 /* find a suitable new size for the given array, */
785 /* hopefully by rounding to a ncie-to-malloc size */
786 inline_size int
787 array_nextsize (int elem, int cur, int cnt)
788 {
789 int ncur = cur + 1;
790
791 do
792 ncur <<= 1;
793 while (cnt > ncur);
794
795 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
796 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
797 {
798 ncur *= elem;
799 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
800 ncur = ncur - sizeof (void *) * 4;
801 ncur /= elem;
802 }
803
804 return ncur;
805 }
806
807 static noinline void *
808 array_realloc (int elem, void *base, int *cur, int cnt)
809 {
810 *cur = array_nextsize (elem, *cur, cnt);
811 return ev_realloc (base, elem * *cur);
812 }
813
814 #define array_init_zero(base,count) \
815 memset ((void *)(base), 0, sizeof (*(base)) * (count))
816
817 #define array_needsize(type,base,cur,cnt,init) \
818 if (expect_false ((cnt) > (cur))) \
819 { \
820 int ocur_ = (cur); \
821 (base) = (type *)array_realloc \
822 (sizeof (type), (base), &(cur), (cnt)); \
823 init ((base) + (ocur_), (cur) - ocur_); \
824 }
825
826 #if 0
827 #define array_slim(type,stem) \
828 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
829 { \
830 stem ## max = array_roundsize (stem ## cnt >> 1); \
831 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
832 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
833 }
834 #endif
835
836 #define array_free(stem, idx) \
837 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
838
839 /*****************************************************************************/
840
841 /* dummy callback for pending events */
842 static void noinline
843 pendingcb (EV_P_ ev_prepare *w, int revents)
844 {
845 }
846
847 void noinline
848 ev_feed_event (EV_P_ void *w, int revents)
849 {
850 W w_ = (W)w;
851 int pri = ABSPRI (w_);
852
853 if (expect_false (w_->pending))
854 pendings [pri][w_->pending - 1].events |= revents;
855 else
856 {
857 w_->pending = ++pendingcnt [pri];
858 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
859 pendings [pri][w_->pending - 1].w = w_;
860 pendings [pri][w_->pending - 1].events = revents;
861 }
862 }
863
864 inline_speed void
865 feed_reverse (EV_P_ W w)
866 {
867 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
868 rfeeds [rfeedcnt++] = w;
869 }
870
871 inline_size void
872 feed_reverse_done (EV_P_ int revents)
873 {
874 do
875 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
876 while (rfeedcnt);
877 }
878
879 inline_speed void
880 queue_events (EV_P_ W *events, int eventcnt, int type)
881 {
882 int i;
883
884 for (i = 0; i < eventcnt; ++i)
885 ev_feed_event (EV_A_ events [i], type);
886 }
887
888 /*****************************************************************************/
889
890 inline_speed void
891 fd_event_nc (EV_P_ int fd, int revents)
892 {
893 ANFD *anfd = anfds + fd;
894 ev_io *w;
895
896 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
897 {
898 int ev = w->events & revents;
899
900 if (ev)
901 ev_feed_event (EV_A_ (W)w, ev);
902 }
903 }
904
905 /* do not submit kernel events for fds that have reify set */
906 /* because that means they changed while we were polling for new events */
907 inline_speed void
908 fd_event (EV_P_ int fd, int revents)
909 {
910 ANFD *anfd = anfds + fd;
911
912 if (expect_true (!anfd->reify))
913 fd_event_nc (EV_A_ fd, revents);
914 }
915
916 void
917 ev_feed_fd_event (EV_P_ int fd, int revents)
918 {
919 if (fd >= 0 && fd < anfdmax)
920 fd_event_nc (EV_A_ fd, revents);
921 }
922
923 /* make sure the external fd watch events are in-sync */
924 /* with the kernel/libev internal state */
925 inline_size void
926 fd_reify (EV_P)
927 {
928 int i;
929
930 for (i = 0; i < fdchangecnt; ++i)
931 {
932 int fd = fdchanges [i];
933 ANFD *anfd = anfds + fd;
934 ev_io *w;
935
936 unsigned char events = 0;
937
938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
939 events |= (unsigned char)w->events;
940
941 #if EV_SELECT_IS_WINSOCKET
942 if (events)
943 {
944 unsigned long arg;
945 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
946 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
947 }
948 #endif
949
950 {
951 unsigned char o_events = anfd->events;
952 unsigned char o_reify = anfd->reify;
953
954 anfd->reify = 0;
955 anfd->events = events;
956
957 if (o_events != events || o_reify & EV__IOFDSET)
958 backend_modify (EV_A_ fd, o_events, events);
959 }
960 }
961
962 fdchangecnt = 0;
963 }
964
965 /* something about the given fd changed */
966 inline_size void
967 fd_change (EV_P_ int fd, int flags)
968 {
969 unsigned char reify = anfds [fd].reify;
970 anfds [fd].reify |= flags;
971
972 if (expect_true (!reify))
973 {
974 ++fdchangecnt;
975 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
976 fdchanges [fdchangecnt - 1] = fd;
977 }
978 }
979
980 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
981 inline_speed void
982 fd_kill (EV_P_ int fd)
983 {
984 ev_io *w;
985
986 while ((w = (ev_io *)anfds [fd].head))
987 {
988 ev_io_stop (EV_A_ w);
989 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
990 }
991 }
992
993 /* check whether the given fd is atcually valid, for error recovery */
994 inline_size int
995 fd_valid (int fd)
996 {
997 #ifdef _WIN32
998 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
999 #else
1000 return fcntl (fd, F_GETFD) != -1;
1001 #endif
1002 }
1003
1004 /* called on EBADF to verify fds */
1005 static void noinline
1006 fd_ebadf (EV_P)
1007 {
1008 int fd;
1009
1010 for (fd = 0; fd < anfdmax; ++fd)
1011 if (anfds [fd].events)
1012 if (!fd_valid (fd) && errno == EBADF)
1013 fd_kill (EV_A_ fd);
1014 }
1015
1016 /* called on ENOMEM in select/poll to kill some fds and retry */
1017 static void noinline
1018 fd_enomem (EV_P)
1019 {
1020 int fd;
1021
1022 for (fd = anfdmax; fd--; )
1023 if (anfds [fd].events)
1024 {
1025 fd_kill (EV_A_ fd);
1026 break;
1027 }
1028 }
1029
1030 /* usually called after fork if backend needs to re-arm all fds from scratch */
1031 static void noinline
1032 fd_rearm_all (EV_P)
1033 {
1034 int fd;
1035
1036 for (fd = 0; fd < anfdmax; ++fd)
1037 if (anfds [fd].events)
1038 {
1039 anfds [fd].events = 0;
1040 anfds [fd].emask = 0;
1041 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1042 }
1043 }
1044
1045 /*****************************************************************************/
1046
1047 /*
1048 * the heap functions want a real array index. array index 0 uis guaranteed to not
1049 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1050 * the branching factor of the d-tree.
1051 */
1052
1053 /*
1054 * at the moment we allow libev the luxury of two heaps,
1055 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1056 * which is more cache-efficient.
1057 * the difference is about 5% with 50000+ watchers.
1058 */
1059 #if EV_USE_4HEAP
1060
1061 #define DHEAP 4
1062 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1063 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1064 #define UPHEAP_DONE(p,k) ((p) == (k))
1065
1066 /* away from the root */
1067 inline_speed void
1068 downheap (ANHE *heap, int N, int k)
1069 {
1070 ANHE he = heap [k];
1071 ANHE *E = heap + N + HEAP0;
1072
1073 for (;;)
1074 {
1075 ev_tstamp minat;
1076 ANHE *minpos;
1077 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1078
1079 /* find minimum child */
1080 if (expect_true (pos + DHEAP - 1 < E))
1081 {
1082 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1083 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1084 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1085 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1086 }
1087 else if (pos < E)
1088 {
1089 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1090 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1091 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1092 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1093 }
1094 else
1095 break;
1096
1097 if (ANHE_at (he) <= minat)
1098 break;
1099
1100 heap [k] = *minpos;
1101 ev_active (ANHE_w (*minpos)) = k;
1102
1103 k = minpos - heap;
1104 }
1105
1106 heap [k] = he;
1107 ev_active (ANHE_w (he)) = k;
1108 }
1109
1110 #else /* 4HEAP */
1111
1112 #define HEAP0 1
1113 #define HPARENT(k) ((k) >> 1)
1114 #define UPHEAP_DONE(p,k) (!(p))
1115
1116 /* away from the root */
1117 inline_speed void
1118 downheap (ANHE *heap, int N, int k)
1119 {
1120 ANHE he = heap [k];
1121
1122 for (;;)
1123 {
1124 int c = k << 1;
1125
1126 if (c >= N + HEAP0)
1127 break;
1128
1129 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1130 ? 1 : 0;
1131
1132 if (ANHE_at (he) <= ANHE_at (heap [c]))
1133 break;
1134
1135 heap [k] = heap [c];
1136 ev_active (ANHE_w (heap [k])) = k;
1137
1138 k = c;
1139 }
1140
1141 heap [k] = he;
1142 ev_active (ANHE_w (he)) = k;
1143 }
1144 #endif
1145
1146 /* towards the root */
1147 inline_speed void
1148 upheap (ANHE *heap, int k)
1149 {
1150 ANHE he = heap [k];
1151
1152 for (;;)
1153 {
1154 int p = HPARENT (k);
1155
1156 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1157 break;
1158
1159 heap [k] = heap [p];
1160 ev_active (ANHE_w (heap [k])) = k;
1161 k = p;
1162 }
1163
1164 heap [k] = he;
1165 ev_active (ANHE_w (he)) = k;
1166 }
1167
1168 /* move an element suitably so it is in a correct place */
1169 inline_size void
1170 adjustheap (ANHE *heap, int N, int k)
1171 {
1172 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1173 upheap (heap, k);
1174 else
1175 downheap (heap, N, k);
1176 }
1177
1178 /* rebuild the heap: this function is used only once and executed rarely */
1179 inline_size void
1180 reheap (ANHE *heap, int N)
1181 {
1182 int i;
1183
1184 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1185 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1186 for (i = 0; i < N; ++i)
1187 upheap (heap, i + HEAP0);
1188 }
1189
1190 /*****************************************************************************/
1191
1192 /* associate signal watchers to a signal signal */
1193 typedef struct
1194 {
1195 EV_ATOMIC_T pending;
1196 #if EV_MULTIPLICITY
1197 EV_P;
1198 #endif
1199 WL head;
1200 } ANSIG;
1201
1202 static ANSIG signals [EV_NSIG - 1];
1203
1204 /*****************************************************************************/
1205
1206 /* used to prepare libev internal fd's */
1207 /* this is not fork-safe */
1208 inline_speed void
1209 fd_intern (int fd)
1210 {
1211 #ifdef _WIN32
1212 unsigned long arg = 1;
1213 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1214 #else
1215 fcntl (fd, F_SETFD, FD_CLOEXEC);
1216 fcntl (fd, F_SETFL, O_NONBLOCK);
1217 #endif
1218 }
1219
1220 static void noinline
1221 evpipe_init (EV_P)
1222 {
1223 if (!ev_is_active (&pipe_w))
1224 {
1225 #if EV_USE_EVENTFD
1226 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1227 if (evfd < 0 && errno == EINVAL)
1228 evfd = eventfd (0, 0);
1229
1230 if (evfd >= 0)
1231 {
1232 evpipe [0] = -1;
1233 fd_intern (evfd); /* doing it twice doesn't hurt */
1234 ev_io_set (&pipe_w, evfd, EV_READ);
1235 }
1236 else
1237 #endif
1238 {
1239 while (pipe (evpipe))
1240 ev_syserr ("(libev) error creating signal/async pipe");
1241
1242 fd_intern (evpipe [0]);
1243 fd_intern (evpipe [1]);
1244 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1245 }
1246
1247 ev_io_start (EV_A_ &pipe_w);
1248 ev_unref (EV_A); /* watcher should not keep loop alive */
1249 }
1250 }
1251
1252 inline_size void
1253 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1254 {
1255 if (!*flag)
1256 {
1257 int old_errno = errno; /* save errno because write might clobber it */
1258
1259 *flag = 1;
1260
1261 #if EV_USE_EVENTFD
1262 if (evfd >= 0)
1263 {
1264 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t));
1266 }
1267 else
1268 #endif
1269 write (evpipe [1], &old_errno, 1);
1270
1271 errno = old_errno;
1272 }
1273 }
1274
1275 /* called whenever the libev signal pipe */
1276 /* got some events (signal, async) */
1277 static void
1278 pipecb (EV_P_ ev_io *iow, int revents)
1279 {
1280 int i;
1281
1282 #if EV_USE_EVENTFD
1283 if (evfd >= 0)
1284 {
1285 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t));
1287 }
1288 else
1289 #endif
1290 {
1291 char dummy;
1292 read (evpipe [0], &dummy, 1);
1293 }
1294
1295 if (sig_pending)
1296 {
1297 sig_pending = 0;
1298
1299 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1);
1302 }
1303
1304 #if EV_ASYNC_ENABLE
1305 if (async_pending)
1306 {
1307 async_pending = 0;
1308
1309 for (i = asynccnt; i--; )
1310 if (asyncs [i]->sent)
1311 {
1312 asyncs [i]->sent = 0;
1313 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1314 }
1315 }
1316 #endif
1317 }
1318
1319 /*****************************************************************************/
1320
1321 static void
1322 ev_sighandler (int signum)
1323 {
1324 #if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326 #endif
1327
1328 #ifdef _WIN32
1329 signal (signum, ev_sighandler);
1330 #endif
1331
1332 signals [signum - 1].pending = 1;
1333 evpipe_write (EV_A_ &sig_pending);
1334 }
1335
1336 void noinline
1337 ev_feed_signal_event (EV_P_ int signum)
1338 {
1339 WL w;
1340
1341 if (expect_false (signum <= 0 || signum > EV_NSIG))
1342 return;
1343
1344 --signum;
1345
1346 #if EV_MULTIPLICITY
1347 /* it is permissible to try to feed a signal to the wrong loop */
1348 /* or, likely more useful, feeding a signal nobody is waiting for */
1349
1350 if (expect_false (signals [signum].loop != EV_A))
1351 return;
1352 #endif
1353
1354 signals [signum].pending = 0;
1355
1356 for (w = signals [signum].head; w; w = w->next)
1357 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1358 }
1359
1360 #if EV_USE_SIGNALFD
1361 static void
1362 sigfdcb (EV_P_ ev_io *iow, int revents)
1363 {
1364 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1365
1366 for (;;)
1367 {
1368 ssize_t res = read (sigfd, si, sizeof (si));
1369
1370 /* not ISO-C, as res might be -1, but works with SuS */
1371 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1372 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1373
1374 if (res < (ssize_t)sizeof (si))
1375 break;
1376 }
1377 }
1378 #endif
1379
1380 /*****************************************************************************/
1381
1382 static WL childs [EV_PID_HASHSIZE];
1383
1384 #ifndef _WIN32
1385
1386 static ev_signal childev;
1387
1388 #ifndef WIFCONTINUED
1389 # define WIFCONTINUED(status) 0
1390 #endif
1391
1392 /* handle a single child status event */
1393 inline_speed void
1394 child_reap (EV_P_ int chain, int pid, int status)
1395 {
1396 ev_child *w;
1397 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1398
1399 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1400 {
1401 if ((w->pid == pid || !w->pid)
1402 && (!traced || (w->flags & 1)))
1403 {
1404 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1405 w->rpid = pid;
1406 w->rstatus = status;
1407 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1408 }
1409 }
1410 }
1411
1412 #ifndef WCONTINUED
1413 # define WCONTINUED 0
1414 #endif
1415
1416 /* called on sigchld etc., calls waitpid */
1417 static void
1418 childcb (EV_P_ ev_signal *sw, int revents)
1419 {
1420 int pid, status;
1421
1422 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1423 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1424 if (!WCONTINUED
1425 || errno != EINVAL
1426 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1427 return;
1428
1429 /* make sure we are called again until all children have been reaped */
1430 /* we need to do it this way so that the callback gets called before we continue */
1431 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1432
1433 child_reap (EV_A_ pid, pid, status);
1434 if (EV_PID_HASHSIZE > 1)
1435 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1436 }
1437
1438 #endif
1439
1440 /*****************************************************************************/
1441
1442 #if EV_USE_PORT
1443 # include "ev_port.c"
1444 #endif
1445 #if EV_USE_KQUEUE
1446 # include "ev_kqueue.c"
1447 #endif
1448 #if EV_USE_EPOLL
1449 # include "ev_epoll.c"
1450 #endif
1451 #if EV_USE_POLL
1452 # include "ev_poll.c"
1453 #endif
1454 #if EV_USE_SELECT
1455 # include "ev_select.c"
1456 #endif
1457
1458 int
1459 ev_version_major (void)
1460 {
1461 return EV_VERSION_MAJOR;
1462 }
1463
1464 int
1465 ev_version_minor (void)
1466 {
1467 return EV_VERSION_MINOR;
1468 }
1469
1470 /* return true if we are running with elevated privileges and should ignore env variables */
1471 int inline_size
1472 enable_secure (void)
1473 {
1474 #ifdef _WIN32
1475 return 0;
1476 #else
1477 return getuid () != geteuid ()
1478 || getgid () != getegid ();
1479 #endif
1480 }
1481
1482 unsigned int
1483 ev_supported_backends (void)
1484 {
1485 unsigned int flags = 0;
1486
1487 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1488 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1489 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1490 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1491 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1492
1493 return flags;
1494 }
1495
1496 unsigned int
1497 ev_recommended_backends (void)
1498 {
1499 unsigned int flags = ev_supported_backends ();
1500
1501 #ifndef __NetBSD__
1502 /* kqueue is borked on everything but netbsd apparently */
1503 /* it usually doesn't work correctly on anything but sockets and pipes */
1504 flags &= ~EVBACKEND_KQUEUE;
1505 #endif
1506 #ifdef __APPLE__
1507 /* only select works correctly on that "unix-certified" platform */
1508 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1509 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1510 #endif
1511
1512 return flags;
1513 }
1514
1515 unsigned int
1516 ev_embeddable_backends (void)
1517 {
1518 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1519
1520 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1521 /* please fix it and tell me how to detect the fix */
1522 flags &= ~EVBACKEND_EPOLL;
1523
1524 return flags;
1525 }
1526
1527 unsigned int
1528 ev_backend (EV_P)
1529 {
1530 return backend;
1531 }
1532
1533 #if EV_MINIMAL < 2
1534 unsigned int
1535 ev_loop_count (EV_P)
1536 {
1537 return loop_count;
1538 }
1539
1540 unsigned int
1541 ev_loop_depth (EV_P)
1542 {
1543 return loop_depth;
1544 }
1545
1546 void
1547 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1548 {
1549 io_blocktime = interval;
1550 }
1551
1552 void
1553 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1554 {
1555 timeout_blocktime = interval;
1556 }
1557
1558 void
1559 ev_set_userdata (EV_P_ void *data)
1560 {
1561 userdata = data;
1562 }
1563
1564 void *
1565 ev_userdata (EV_P)
1566 {
1567 return userdata;
1568 }
1569
1570 void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1571 {
1572 invoke_cb = invoke_pending_cb;
1573 }
1574
1575 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1576 {
1577 release_cb = release;
1578 acquire_cb = acquire;
1579 }
1580 #endif
1581
1582 /* initialise a loop structure, must be zero-initialised */
1583 static void noinline
1584 loop_init (EV_P_ unsigned int flags)
1585 {
1586 if (!backend)
1587 {
1588 #if EV_USE_REALTIME
1589 if (!have_realtime)
1590 {
1591 struct timespec ts;
1592
1593 if (!clock_gettime (CLOCK_REALTIME, &ts))
1594 have_realtime = 1;
1595 }
1596 #endif
1597
1598 #if EV_USE_MONOTONIC
1599 if (!have_monotonic)
1600 {
1601 struct timespec ts;
1602
1603 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1604 have_monotonic = 1;
1605 }
1606 #endif
1607
1608 /* pid check not overridable via env */
1609 #ifndef _WIN32
1610 if (flags & EVFLAG_FORKCHECK)
1611 curpid = getpid ();
1612 #endif
1613
1614 if (!(flags & EVFLAG_NOENV)
1615 && !enable_secure ()
1616 && getenv ("LIBEV_FLAGS"))
1617 flags = atoi (getenv ("LIBEV_FLAGS"));
1618
1619 ev_rt_now = ev_time ();
1620 mn_now = get_clock ();
1621 now_floor = mn_now;
1622 rtmn_diff = ev_rt_now - mn_now;
1623 #if EV_MINIMAL < 2
1624 invoke_cb = ev_invoke_pending;
1625 #endif
1626
1627 io_blocktime = 0.;
1628 timeout_blocktime = 0.;
1629 backend = 0;
1630 backend_fd = -1;
1631 sig_pending = 0;
1632 #if EV_ASYNC_ENABLE
1633 async_pending = 0;
1634 #endif
1635 #if EV_USE_INOTIFY
1636 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1637 #endif
1638 #if EV_USE_SIGNALFD
1639 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1640 #endif
1641
1642 if (!(flags & 0x0000ffffU))
1643 flags |= ev_recommended_backends ();
1644
1645 #if EV_USE_PORT
1646 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1647 #endif
1648 #if EV_USE_KQUEUE
1649 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1650 #endif
1651 #if EV_USE_EPOLL
1652 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1653 #endif
1654 #if EV_USE_POLL
1655 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1656 #endif
1657 #if EV_USE_SELECT
1658 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1659 #endif
1660
1661 ev_prepare_init (&pending_w, pendingcb);
1662
1663 ev_init (&pipe_w, pipecb);
1664 ev_set_priority (&pipe_w, EV_MAXPRI);
1665 }
1666 }
1667
1668 /* free up a loop structure */
1669 static void noinline
1670 loop_destroy (EV_P)
1671 {
1672 int i;
1673
1674 if (ev_is_active (&pipe_w))
1675 {
1676 /*ev_ref (EV_A);*/
1677 /*ev_io_stop (EV_A_ &pipe_w);*/
1678
1679 #if EV_USE_EVENTFD
1680 if (evfd >= 0)
1681 close (evfd);
1682 #endif
1683
1684 if (evpipe [0] >= 0)
1685 {
1686 EV_WIN32_CLOSE_FD (evpipe [0]);
1687 EV_WIN32_CLOSE_FD (evpipe [1]);
1688 }
1689 }
1690
1691 #if EV_USE_SIGNALFD
1692 if (ev_is_active (&sigfd_w))
1693 close (sigfd);
1694 #endif
1695
1696 #if EV_USE_INOTIFY
1697 if (fs_fd >= 0)
1698 close (fs_fd);
1699 #endif
1700
1701 if (backend_fd >= 0)
1702 close (backend_fd);
1703
1704 #if EV_USE_PORT
1705 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1706 #endif
1707 #if EV_USE_KQUEUE
1708 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1709 #endif
1710 #if EV_USE_EPOLL
1711 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1712 #endif
1713 #if EV_USE_POLL
1714 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1715 #endif
1716 #if EV_USE_SELECT
1717 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1718 #endif
1719
1720 for (i = NUMPRI; i--; )
1721 {
1722 array_free (pending, [i]);
1723 #if EV_IDLE_ENABLE
1724 array_free (idle, [i]);
1725 #endif
1726 }
1727
1728 ev_free (anfds); anfds = 0; anfdmax = 0;
1729
1730 /* have to use the microsoft-never-gets-it-right macro */
1731 array_free (rfeed, EMPTY);
1732 array_free (fdchange, EMPTY);
1733 array_free (timer, EMPTY);
1734 #if EV_PERIODIC_ENABLE
1735 array_free (periodic, EMPTY);
1736 #endif
1737 #if EV_FORK_ENABLE
1738 array_free (fork, EMPTY);
1739 #endif
1740 array_free (prepare, EMPTY);
1741 array_free (check, EMPTY);
1742 #if EV_ASYNC_ENABLE
1743 array_free (async, EMPTY);
1744 #endif
1745
1746 backend = 0;
1747 }
1748
1749 #if EV_USE_INOTIFY
1750 inline_size void infy_fork (EV_P);
1751 #endif
1752
1753 inline_size void
1754 loop_fork (EV_P)
1755 {
1756 #if EV_USE_PORT
1757 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1758 #endif
1759 #if EV_USE_KQUEUE
1760 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1761 #endif
1762 #if EV_USE_EPOLL
1763 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1764 #endif
1765 #if EV_USE_INOTIFY
1766 infy_fork (EV_A);
1767 #endif
1768
1769 if (ev_is_active (&pipe_w))
1770 {
1771 /* this "locks" the handlers against writing to the pipe */
1772 /* while we modify the fd vars */
1773 sig_pending = 1;
1774 #if EV_ASYNC_ENABLE
1775 async_pending = 1;
1776 #endif
1777
1778 ev_ref (EV_A);
1779 ev_io_stop (EV_A_ &pipe_w);
1780
1781 #if EV_USE_EVENTFD
1782 if (evfd >= 0)
1783 close (evfd);
1784 #endif
1785
1786 if (evpipe [0] >= 0)
1787 {
1788 EV_WIN32_CLOSE_FD (evpipe [0]);
1789 EV_WIN32_CLOSE_FD (evpipe [1]);
1790 }
1791
1792 evpipe_init (EV_A);
1793 /* now iterate over everything, in case we missed something */
1794 pipecb (EV_A_ &pipe_w, EV_READ);
1795 }
1796
1797 postfork = 0;
1798 }
1799
1800 #if EV_MULTIPLICITY
1801
1802 struct ev_loop *
1803 ev_loop_new (unsigned int flags)
1804 {
1805 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1806
1807 memset (EV_A, 0, sizeof (struct ev_loop));
1808 loop_init (EV_A_ flags);
1809
1810 if (ev_backend (EV_A))
1811 return EV_A;
1812
1813 return 0;
1814 }
1815
1816 void
1817 ev_loop_destroy (EV_P)
1818 {
1819 loop_destroy (EV_A);
1820 ev_free (loop);
1821 }
1822
1823 void
1824 ev_loop_fork (EV_P)
1825 {
1826 postfork = 1; /* must be in line with ev_default_fork */
1827 }
1828 #endif /* multiplicity */
1829
1830 #if EV_VERIFY
1831 static void noinline
1832 verify_watcher (EV_P_ W w)
1833 {
1834 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1835
1836 if (w->pending)
1837 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1838 }
1839
1840 static void noinline
1841 verify_heap (EV_P_ ANHE *heap, int N)
1842 {
1843 int i;
1844
1845 for (i = HEAP0; i < N + HEAP0; ++i)
1846 {
1847 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1848 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1849 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1850
1851 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1852 }
1853 }
1854
1855 static void noinline
1856 array_verify (EV_P_ W *ws, int cnt)
1857 {
1858 while (cnt--)
1859 {
1860 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1861 verify_watcher (EV_A_ ws [cnt]);
1862 }
1863 }
1864 #endif
1865
1866 #if EV_MINIMAL < 2
1867 void
1868 ev_loop_verify (EV_P)
1869 {
1870 #if EV_VERIFY
1871 int i;
1872 WL w;
1873
1874 assert (activecnt >= -1);
1875
1876 assert (fdchangemax >= fdchangecnt);
1877 for (i = 0; i < fdchangecnt; ++i)
1878 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1879
1880 assert (anfdmax >= 0);
1881 for (i = 0; i < anfdmax; ++i)
1882 for (w = anfds [i].head; w; w = w->next)
1883 {
1884 verify_watcher (EV_A_ (W)w);
1885 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1886 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1887 }
1888
1889 assert (timermax >= timercnt);
1890 verify_heap (EV_A_ timers, timercnt);
1891
1892 #if EV_PERIODIC_ENABLE
1893 assert (periodicmax >= periodiccnt);
1894 verify_heap (EV_A_ periodics, periodiccnt);
1895 #endif
1896
1897 for (i = NUMPRI; i--; )
1898 {
1899 assert (pendingmax [i] >= pendingcnt [i]);
1900 #if EV_IDLE_ENABLE
1901 assert (idleall >= 0);
1902 assert (idlemax [i] >= idlecnt [i]);
1903 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1904 #endif
1905 }
1906
1907 #if EV_FORK_ENABLE
1908 assert (forkmax >= forkcnt);
1909 array_verify (EV_A_ (W *)forks, forkcnt);
1910 #endif
1911
1912 #if EV_ASYNC_ENABLE
1913 assert (asyncmax >= asynccnt);
1914 array_verify (EV_A_ (W *)asyncs, asynccnt);
1915 #endif
1916
1917 assert (preparemax >= preparecnt);
1918 array_verify (EV_A_ (W *)prepares, preparecnt);
1919
1920 assert (checkmax >= checkcnt);
1921 array_verify (EV_A_ (W *)checks, checkcnt);
1922
1923 # if 0
1924 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1925 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1926 # endif
1927 #endif
1928 }
1929 #endif
1930
1931 #if EV_MULTIPLICITY
1932 struct ev_loop *
1933 ev_default_loop_init (unsigned int flags)
1934 #else
1935 int
1936 ev_default_loop (unsigned int flags)
1937 #endif
1938 {
1939 if (!ev_default_loop_ptr)
1940 {
1941 #if EV_MULTIPLICITY
1942 EV_P = ev_default_loop_ptr = &default_loop_struct;
1943 #else
1944 ev_default_loop_ptr = 1;
1945 #endif
1946
1947 loop_init (EV_A_ flags);
1948
1949 if (ev_backend (EV_A))
1950 {
1951 #ifndef _WIN32
1952 ev_signal_init (&childev, childcb, SIGCHLD);
1953 ev_set_priority (&childev, EV_MAXPRI);
1954 ev_signal_start (EV_A_ &childev);
1955 ev_unref (EV_A); /* child watcher should not keep loop alive */
1956 #endif
1957 }
1958 else
1959 ev_default_loop_ptr = 0;
1960 }
1961
1962 return ev_default_loop_ptr;
1963 }
1964
1965 void
1966 ev_default_destroy (void)
1967 {
1968 #if EV_MULTIPLICITY
1969 EV_P = ev_default_loop_ptr;
1970 #endif
1971
1972 ev_default_loop_ptr = 0;
1973
1974 #ifndef _WIN32
1975 ev_ref (EV_A); /* child watcher */
1976 ev_signal_stop (EV_A_ &childev);
1977 #endif
1978
1979 loop_destroy (EV_A);
1980 }
1981
1982 void
1983 ev_default_fork (void)
1984 {
1985 #if EV_MULTIPLICITY
1986 EV_P = ev_default_loop_ptr;
1987 #endif
1988
1989 postfork = 1; /* must be in line with ev_loop_fork */
1990 }
1991
1992 /*****************************************************************************/
1993
1994 void
1995 ev_invoke (EV_P_ void *w, int revents)
1996 {
1997 EV_CB_INVOKE ((W)w, revents);
1998 }
1999
2000 unsigned int
2001 ev_pending_count (EV_P)
2002 {
2003 int pri;
2004 unsigned int count = 0;
2005
2006 for (pri = NUMPRI; pri--; )
2007 count += pendingcnt [pri];
2008
2009 return count;
2010 }
2011
2012 void noinline
2013 ev_invoke_pending (EV_P)
2014 {
2015 int pri;
2016
2017 for (pri = NUMPRI; pri--; )
2018 while (pendingcnt [pri])
2019 {
2020 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2021
2022 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2023 /* ^ this is no longer true, as pending_w could be here */
2024
2025 p->w->pending = 0;
2026 EV_CB_INVOKE (p->w, p->events);
2027 EV_FREQUENT_CHECK;
2028 }
2029 }
2030
2031 #if EV_IDLE_ENABLE
2032 /* make idle watchers pending. this handles the "call-idle */
2033 /* only when higher priorities are idle" logic */
2034 inline_size void
2035 idle_reify (EV_P)
2036 {
2037 if (expect_false (idleall))
2038 {
2039 int pri;
2040
2041 for (pri = NUMPRI; pri--; )
2042 {
2043 if (pendingcnt [pri])
2044 break;
2045
2046 if (idlecnt [pri])
2047 {
2048 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2049 break;
2050 }
2051 }
2052 }
2053 }
2054 #endif
2055
2056 /* make timers pending */
2057 inline_size void
2058 timers_reify (EV_P)
2059 {
2060 EV_FREQUENT_CHECK;
2061
2062 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2063 {
2064 do
2065 {
2066 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2067
2068 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2069
2070 /* first reschedule or stop timer */
2071 if (w->repeat)
2072 {
2073 ev_at (w) += w->repeat;
2074 if (ev_at (w) < mn_now)
2075 ev_at (w) = mn_now;
2076
2077 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2078
2079 ANHE_at_cache (timers [HEAP0]);
2080 downheap (timers, timercnt, HEAP0);
2081 }
2082 else
2083 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2084
2085 EV_FREQUENT_CHECK;
2086 feed_reverse (EV_A_ (W)w);
2087 }
2088 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2089
2090 feed_reverse_done (EV_A_ EV_TIMEOUT);
2091 }
2092 }
2093
2094 #if EV_PERIODIC_ENABLE
2095 /* make periodics pending */
2096 inline_size void
2097 periodics_reify (EV_P)
2098 {
2099 EV_FREQUENT_CHECK;
2100
2101 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2102 {
2103 int feed_count = 0;
2104
2105 do
2106 {
2107 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2108
2109 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2110
2111 /* first reschedule or stop timer */
2112 if (w->reschedule_cb)
2113 {
2114 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2115
2116 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2117
2118 ANHE_at_cache (periodics [HEAP0]);
2119 downheap (periodics, periodiccnt, HEAP0);
2120 }
2121 else if (w->interval)
2122 {
2123 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2124 /* if next trigger time is not sufficiently in the future, put it there */
2125 /* this might happen because of floating point inexactness */
2126 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2127 {
2128 ev_at (w) += w->interval;
2129
2130 /* if interval is unreasonably low we might still have a time in the past */
2131 /* so correct this. this will make the periodic very inexact, but the user */
2132 /* has effectively asked to get triggered more often than possible */
2133 if (ev_at (w) < ev_rt_now)
2134 ev_at (w) = ev_rt_now;
2135 }
2136
2137 ANHE_at_cache (periodics [HEAP0]);
2138 downheap (periodics, periodiccnt, HEAP0);
2139 }
2140 else
2141 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2142
2143 EV_FREQUENT_CHECK;
2144 feed_reverse (EV_A_ (W)w);
2145 }
2146 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2147
2148 feed_reverse_done (EV_A_ EV_PERIODIC);
2149 }
2150 }
2151
2152 /* simply recalculate all periodics */
2153 /* TODO: maybe ensure that at leats one event happens when jumping forward? */
2154 static void noinline
2155 periodics_reschedule (EV_P)
2156 {
2157 int i;
2158
2159 /* adjust periodics after time jump */
2160 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2161 {
2162 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2163
2164 if (w->reschedule_cb)
2165 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2166 else if (w->interval)
2167 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2168
2169 ANHE_at_cache (periodics [i]);
2170 }
2171
2172 reheap (periodics, periodiccnt);
2173 }
2174 #endif
2175
2176 /* adjust all timers by a given offset */
2177 static void noinline
2178 timers_reschedule (EV_P_ ev_tstamp adjust)
2179 {
2180 int i;
2181
2182 for (i = 0; i < timercnt; ++i)
2183 {
2184 ANHE *he = timers + i + HEAP0;
2185 ANHE_w (*he)->at += adjust;
2186 ANHE_at_cache (*he);
2187 }
2188 }
2189
2190 /* fetch new monotonic and realtime times from the kernel */
2191 /* also detect if there was a timejump, and act accordingly */
2192 inline_speed void
2193 time_update (EV_P_ ev_tstamp max_block)
2194 {
2195 #if EV_USE_MONOTONIC
2196 if (expect_true (have_monotonic))
2197 {
2198 int i;
2199 ev_tstamp odiff = rtmn_diff;
2200
2201 mn_now = get_clock ();
2202
2203 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2204 /* interpolate in the meantime */
2205 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2206 {
2207 ev_rt_now = rtmn_diff + mn_now;
2208 return;
2209 }
2210
2211 now_floor = mn_now;
2212 ev_rt_now = ev_time ();
2213
2214 /* loop a few times, before making important decisions.
2215 * on the choice of "4": one iteration isn't enough,
2216 * in case we get preempted during the calls to
2217 * ev_time and get_clock. a second call is almost guaranteed
2218 * to succeed in that case, though. and looping a few more times
2219 * doesn't hurt either as we only do this on time-jumps or
2220 * in the unlikely event of having been preempted here.
2221 */
2222 for (i = 4; --i; )
2223 {
2224 rtmn_diff = ev_rt_now - mn_now;
2225
2226 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2227 return; /* all is well */
2228
2229 ev_rt_now = ev_time ();
2230 mn_now = get_clock ();
2231 now_floor = mn_now;
2232 }
2233
2234 /* no timer adjustment, as the monotonic clock doesn't jump */
2235 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2236 # if EV_PERIODIC_ENABLE
2237 periodics_reschedule (EV_A);
2238 # endif
2239 }
2240 else
2241 #endif
2242 {
2243 ev_rt_now = ev_time ();
2244
2245 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2246 {
2247 /* adjust timers. this is easy, as the offset is the same for all of them */
2248 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2249 #if EV_PERIODIC_ENABLE
2250 periodics_reschedule (EV_A);
2251 #endif
2252 }
2253
2254 mn_now = ev_rt_now;
2255 }
2256 }
2257
2258 void
2259 ev_loop (EV_P_ int flags)
2260 {
2261 #if EV_MINIMAL < 2
2262 ++loop_depth;
2263 #endif
2264
2265 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2266
2267 loop_done = EVUNLOOP_CANCEL;
2268
2269 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2270
2271 do
2272 {
2273 #if EV_VERIFY >= 2
2274 ev_loop_verify (EV_A);
2275 #endif
2276
2277 #ifndef _WIN32
2278 if (expect_false (curpid)) /* penalise the forking check even more */
2279 if (expect_false (getpid () != curpid))
2280 {
2281 curpid = getpid ();
2282 postfork = 1;
2283 }
2284 #endif
2285
2286 #if EV_FORK_ENABLE
2287 /* we might have forked, so queue fork handlers */
2288 if (expect_false (postfork))
2289 if (forkcnt)
2290 {
2291 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2292 EV_INVOKE_PENDING;
2293 }
2294 #endif
2295
2296 /* queue prepare watchers (and execute them) */
2297 if (expect_false (preparecnt))
2298 {
2299 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2300 EV_INVOKE_PENDING;
2301 }
2302
2303 if (expect_false (loop_done))
2304 break;
2305
2306 /* we might have forked, so reify kernel state if necessary */
2307 if (expect_false (postfork))
2308 loop_fork (EV_A);
2309
2310 /* update fd-related kernel structures */
2311 fd_reify (EV_A);
2312
2313 /* calculate blocking time */
2314 {
2315 ev_tstamp waittime = 0.;
2316 ev_tstamp sleeptime = 0.;
2317
2318 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2319 {
2320 /* remember old timestamp for io_blocktime calculation */
2321 ev_tstamp prev_mn_now = mn_now;
2322
2323 /* update time to cancel out callback processing overhead */
2324 time_update (EV_A_ 1e100);
2325
2326 waittime = MAX_BLOCKTIME;
2327
2328 if (timercnt)
2329 {
2330 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2331 if (waittime > to) waittime = to;
2332 }
2333
2334 #if EV_PERIODIC_ENABLE
2335 if (periodiccnt)
2336 {
2337 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2338 if (waittime > to) waittime = to;
2339 }
2340 #endif
2341
2342 /* don't let timeouts decrease the waittime below timeout_blocktime */
2343 if (expect_false (waittime < timeout_blocktime))
2344 waittime = timeout_blocktime;
2345
2346 /* extra check because io_blocktime is commonly 0 */
2347 if (expect_false (io_blocktime))
2348 {
2349 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2350
2351 if (sleeptime > waittime - backend_fudge)
2352 sleeptime = waittime - backend_fudge;
2353
2354 if (expect_true (sleeptime > 0.))
2355 {
2356 ev_sleep (sleeptime);
2357 waittime -= sleeptime;
2358 }
2359 }
2360 }
2361
2362 #if EV_MINIMAL < 2
2363 ++loop_count;
2364 #endif
2365 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2366 backend_poll (EV_A_ waittime);
2367 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2368
2369 /* update ev_rt_now, do magic */
2370 time_update (EV_A_ waittime + sleeptime);
2371 }
2372
2373 /* queue pending timers and reschedule them */
2374 timers_reify (EV_A); /* relative timers called last */
2375 #if EV_PERIODIC_ENABLE
2376 periodics_reify (EV_A); /* absolute timers called first */
2377 #endif
2378
2379 #if EV_IDLE_ENABLE
2380 /* queue idle watchers unless other events are pending */
2381 idle_reify (EV_A);
2382 #endif
2383
2384 /* queue check watchers, to be executed first */
2385 if (expect_false (checkcnt))
2386 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2387
2388 EV_INVOKE_PENDING;
2389 }
2390 while (expect_true (
2391 activecnt
2392 && !loop_done
2393 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2394 ));
2395
2396 if (loop_done == EVUNLOOP_ONE)
2397 loop_done = EVUNLOOP_CANCEL;
2398
2399 #if EV_MINIMAL < 2
2400 --loop_depth;
2401 #endif
2402 }
2403
2404 void
2405 ev_unloop (EV_P_ int how)
2406 {
2407 loop_done = how;
2408 }
2409
2410 void
2411 ev_ref (EV_P)
2412 {
2413 ++activecnt;
2414 }
2415
2416 void
2417 ev_unref (EV_P)
2418 {
2419 --activecnt;
2420 }
2421
2422 void
2423 ev_now_update (EV_P)
2424 {
2425 time_update (EV_A_ 1e100);
2426 }
2427
2428 void
2429 ev_suspend (EV_P)
2430 {
2431 ev_now_update (EV_A);
2432 }
2433
2434 void
2435 ev_resume (EV_P)
2436 {
2437 ev_tstamp mn_prev = mn_now;
2438
2439 ev_now_update (EV_A);
2440 timers_reschedule (EV_A_ mn_now - mn_prev);
2441 #if EV_PERIODIC_ENABLE
2442 /* TODO: really do this? */
2443 periodics_reschedule (EV_A);
2444 #endif
2445 }
2446
2447 /*****************************************************************************/
2448 /* singly-linked list management, used when the expected list length is short */
2449
2450 inline_size void
2451 wlist_add (WL *head, WL elem)
2452 {
2453 elem->next = *head;
2454 *head = elem;
2455 }
2456
2457 inline_size void
2458 wlist_del (WL *head, WL elem)
2459 {
2460 while (*head)
2461 {
2462 if (expect_true (*head == elem))
2463 {
2464 *head = elem->next;
2465 break;
2466 }
2467
2468 head = &(*head)->next;
2469 }
2470 }
2471
2472 /* internal, faster, version of ev_clear_pending */
2473 inline_speed void
2474 clear_pending (EV_P_ W w)
2475 {
2476 if (w->pending)
2477 {
2478 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2479 w->pending = 0;
2480 }
2481 }
2482
2483 int
2484 ev_clear_pending (EV_P_ void *w)
2485 {
2486 W w_ = (W)w;
2487 int pending = w_->pending;
2488
2489 if (expect_true (pending))
2490 {
2491 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2492 p->w = (W)&pending_w;
2493 w_->pending = 0;
2494 return p->events;
2495 }
2496 else
2497 return 0;
2498 }
2499
2500 inline_size void
2501 pri_adjust (EV_P_ W w)
2502 {
2503 int pri = ev_priority (w);
2504 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2505 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2506 ev_set_priority (w, pri);
2507 }
2508
2509 inline_speed void
2510 ev_start (EV_P_ W w, int active)
2511 {
2512 pri_adjust (EV_A_ w);
2513 w->active = active;
2514 ev_ref (EV_A);
2515 }
2516
2517 inline_size void
2518 ev_stop (EV_P_ W w)
2519 {
2520 ev_unref (EV_A);
2521 w->active = 0;
2522 }
2523
2524 /*****************************************************************************/
2525
2526 void noinline
2527 ev_io_start (EV_P_ ev_io *w)
2528 {
2529 int fd = w->fd;
2530
2531 if (expect_false (ev_is_active (w)))
2532 return;
2533
2534 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2535 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2536
2537 EV_FREQUENT_CHECK;
2538
2539 ev_start (EV_A_ (W)w, 1);
2540 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2541 wlist_add (&anfds[fd].head, (WL)w);
2542
2543 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2544 w->events &= ~EV__IOFDSET;
2545
2546 EV_FREQUENT_CHECK;
2547 }
2548
2549 void noinline
2550 ev_io_stop (EV_P_ ev_io *w)
2551 {
2552 clear_pending (EV_A_ (W)w);
2553 if (expect_false (!ev_is_active (w)))
2554 return;
2555
2556 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2557
2558 EV_FREQUENT_CHECK;
2559
2560 wlist_del (&anfds[w->fd].head, (WL)w);
2561 ev_stop (EV_A_ (W)w);
2562
2563 fd_change (EV_A_ w->fd, 1);
2564
2565 EV_FREQUENT_CHECK;
2566 }
2567
2568 void noinline
2569 ev_timer_start (EV_P_ ev_timer *w)
2570 {
2571 if (expect_false (ev_is_active (w)))
2572 return;
2573
2574 ev_at (w) += mn_now;
2575
2576 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2577
2578 EV_FREQUENT_CHECK;
2579
2580 ++timercnt;
2581 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2582 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2583 ANHE_w (timers [ev_active (w)]) = (WT)w;
2584 ANHE_at_cache (timers [ev_active (w)]);
2585 upheap (timers, ev_active (w));
2586
2587 EV_FREQUENT_CHECK;
2588
2589 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2590 }
2591
2592 void noinline
2593 ev_timer_stop (EV_P_ ev_timer *w)
2594 {
2595 clear_pending (EV_A_ (W)w);
2596 if (expect_false (!ev_is_active (w)))
2597 return;
2598
2599 EV_FREQUENT_CHECK;
2600
2601 {
2602 int active = ev_active (w);
2603
2604 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2605
2606 --timercnt;
2607
2608 if (expect_true (active < timercnt + HEAP0))
2609 {
2610 timers [active] = timers [timercnt + HEAP0];
2611 adjustheap (timers, timercnt, active);
2612 }
2613 }
2614
2615 ev_at (w) -= mn_now;
2616
2617 ev_stop (EV_A_ (W)w);
2618
2619 EV_FREQUENT_CHECK;
2620 }
2621
2622 void noinline
2623 ev_timer_again (EV_P_ ev_timer *w)
2624 {
2625 EV_FREQUENT_CHECK;
2626
2627 if (ev_is_active (w))
2628 {
2629 if (w->repeat)
2630 {
2631 ev_at (w) = mn_now + w->repeat;
2632 ANHE_at_cache (timers [ev_active (w)]);
2633 adjustheap (timers, timercnt, ev_active (w));
2634 }
2635 else
2636 ev_timer_stop (EV_A_ w);
2637 }
2638 else if (w->repeat)
2639 {
2640 ev_at (w) = w->repeat;
2641 ev_timer_start (EV_A_ w);
2642 }
2643
2644 EV_FREQUENT_CHECK;
2645 }
2646
2647 ev_tstamp
2648 ev_timer_remaining (EV_P_ ev_timer *w)
2649 {
2650 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2651 }
2652
2653 #if EV_PERIODIC_ENABLE
2654 void noinline
2655 ev_periodic_start (EV_P_ ev_periodic *w)
2656 {
2657 if (expect_false (ev_is_active (w)))
2658 return;
2659
2660 if (w->reschedule_cb)
2661 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2662 else if (w->interval)
2663 {
2664 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2665 /* this formula differs from the one in periodic_reify because we do not always round up */
2666 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2667 }
2668 else
2669 ev_at (w) = w->offset;
2670
2671 EV_FREQUENT_CHECK;
2672
2673 ++periodiccnt;
2674 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2675 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2676 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2677 ANHE_at_cache (periodics [ev_active (w)]);
2678 upheap (periodics, ev_active (w));
2679
2680 EV_FREQUENT_CHECK;
2681
2682 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2683 }
2684
2685 void noinline
2686 ev_periodic_stop (EV_P_ ev_periodic *w)
2687 {
2688 clear_pending (EV_A_ (W)w);
2689 if (expect_false (!ev_is_active (w)))
2690 return;
2691
2692 EV_FREQUENT_CHECK;
2693
2694 {
2695 int active = ev_active (w);
2696
2697 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2698
2699 --periodiccnt;
2700
2701 if (expect_true (active < periodiccnt + HEAP0))
2702 {
2703 periodics [active] = periodics [periodiccnt + HEAP0];
2704 adjustheap (periodics, periodiccnt, active);
2705 }
2706 }
2707
2708 ev_stop (EV_A_ (W)w);
2709
2710 EV_FREQUENT_CHECK;
2711 }
2712
2713 void noinline
2714 ev_periodic_again (EV_P_ ev_periodic *w)
2715 {
2716 /* TODO: use adjustheap and recalculation */
2717 ev_periodic_stop (EV_A_ w);
2718 ev_periodic_start (EV_A_ w);
2719 }
2720 #endif
2721
2722 #ifndef SA_RESTART
2723 # define SA_RESTART 0
2724 #endif
2725
2726 void noinline
2727 ev_signal_start (EV_P_ ev_signal *w)
2728 {
2729 if (expect_false (ev_is_active (w)))
2730 return;
2731
2732 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2733
2734 #if EV_MULTIPLICITY
2735 assert (("libev: a signal must not be attached to two different loops",
2736 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2737
2738 signals [w->signum - 1].loop = EV_A;
2739 #endif
2740
2741 EV_FREQUENT_CHECK;
2742
2743 #if EV_USE_SIGNALFD
2744 if (sigfd == -2)
2745 {
2746 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2747 if (sigfd < 0 && errno == EINVAL)
2748 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2749
2750 if (sigfd >= 0)
2751 {
2752 fd_intern (sigfd); /* doing it twice will not hurt */
2753
2754 sigemptyset (&sigfd_set);
2755
2756 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2757 ev_set_priority (&sigfd_w, EV_MAXPRI);
2758 ev_io_start (EV_A_ &sigfd_w);
2759 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2760 }
2761 }
2762
2763 if (sigfd >= 0)
2764 {
2765 /* TODO: check .head */
2766 sigaddset (&sigfd_set, w->signum);
2767 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2768
2769 signalfd (sigfd, &sigfd_set, 0);
2770 }
2771 #endif
2772
2773 ev_start (EV_A_ (W)w, 1);
2774 wlist_add (&signals [w->signum - 1].head, (WL)w);
2775
2776 if (!((WL)w)->next)
2777 # if EV_USE_SIGNALFD
2778 if (sigfd < 0) /*TODO*/
2779 # endif
2780 {
2781 # ifdef _WIN32
2782 evpipe_init (EV_A);
2783
2784 signal (w->signum, ev_sighandler);
2785 # else
2786 struct sigaction sa;
2787
2788 evpipe_init (EV_A);
2789
2790 sa.sa_handler = ev_sighandler;
2791 sigfillset (&sa.sa_mask);
2792 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2793 sigaction (w->signum, &sa, 0);
2794
2795 sigemptyset (&sa.sa_mask);
2796 sigaddset (&sa.sa_mask, w->signum);
2797 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2798 #endif
2799 }
2800
2801 EV_FREQUENT_CHECK;
2802 }
2803
2804 void noinline
2805 ev_signal_stop (EV_P_ ev_signal *w)
2806 {
2807 clear_pending (EV_A_ (W)w);
2808 if (expect_false (!ev_is_active (w)))
2809 return;
2810
2811 EV_FREQUENT_CHECK;
2812
2813 wlist_del (&signals [w->signum - 1].head, (WL)w);
2814 ev_stop (EV_A_ (W)w);
2815
2816 if (!signals [w->signum - 1].head)
2817 {
2818 #if EV_MULTIPLICITY
2819 signals [w->signum - 1].loop = 0; /* unattach from signal */
2820 #endif
2821 #if EV_USE_SIGNALFD
2822 if (sigfd >= 0)
2823 {
2824 sigset_t ss;
2825
2826 sigemptyset (&ss);
2827 sigaddset (&ss, w->signum);
2828 sigdelset (&sigfd_set, w->signum);
2829
2830 signalfd (sigfd, &sigfd_set, 0);
2831 sigprocmask (SIG_UNBLOCK, &ss, 0);
2832 }
2833 else
2834 #endif
2835 signal (w->signum, SIG_DFL);
2836 }
2837
2838 EV_FREQUENT_CHECK;
2839 }
2840
2841 void
2842 ev_child_start (EV_P_ ev_child *w)
2843 {
2844 #if EV_MULTIPLICITY
2845 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2846 #endif
2847 if (expect_false (ev_is_active (w)))
2848 return;
2849
2850 EV_FREQUENT_CHECK;
2851
2852 ev_start (EV_A_ (W)w, 1);
2853 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2854
2855 EV_FREQUENT_CHECK;
2856 }
2857
2858 void
2859 ev_child_stop (EV_P_ ev_child *w)
2860 {
2861 clear_pending (EV_A_ (W)w);
2862 if (expect_false (!ev_is_active (w)))
2863 return;
2864
2865 EV_FREQUENT_CHECK;
2866
2867 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2868 ev_stop (EV_A_ (W)w);
2869
2870 EV_FREQUENT_CHECK;
2871 }
2872
2873 #if EV_STAT_ENABLE
2874
2875 # ifdef _WIN32
2876 # undef lstat
2877 # define lstat(a,b) _stati64 (a,b)
2878 # endif
2879
2880 #define DEF_STAT_INTERVAL 5.0074891
2881 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2882 #define MIN_STAT_INTERVAL 0.1074891
2883
2884 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2885
2886 #if EV_USE_INOTIFY
2887
2888 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2889 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2890
2891 static void noinline
2892 infy_add (EV_P_ ev_stat *w)
2893 {
2894 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);
2895
2896 if (w->wd >= 0)
2897 {
2898 struct statfs sfs;
2899
2900 /* now local changes will be tracked by inotify, but remote changes won't */
2901 /* unless the filesystem is known to be local, we therefore still poll */
2902 /* also do poll on <2.6.25, but with normal frequency */
2903
2904 if (!fs_2625)
2905 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2906 else if (!statfs (w->path, &sfs)
2907 && (sfs.f_type == 0x1373 /* devfs */
2908 || sfs.f_type == 0xEF53 /* ext2/3 */
2909 || sfs.f_type == 0x3153464a /* jfs */
2910 || sfs.f_type == 0x52654973 /* reiser3 */
2911 || sfs.f_type == 0x01021994 /* tempfs */
2912 || sfs.f_type == 0x58465342 /* xfs */))
2913 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2914 else
2915 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2916 }
2917 else
2918 {
2919 /* can't use inotify, continue to stat */
2920 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2921
2922 /* if path is not there, monitor some parent directory for speedup hints */
2923 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2924 /* but an efficiency issue only */
2925 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2926 {
2927 char path [4096];
2928 strcpy (path, w->path);
2929
2930 do
2931 {
2932 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2933 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2934
2935 char *pend = strrchr (path, '/');
2936
2937 if (!pend || pend == path)
2938 break;
2939
2940 *pend = 0;
2941 w->wd = inotify_add_watch (fs_fd, path, mask);
2942 }
2943 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2944 }
2945 }
2946
2947 if (w->wd >= 0)
2948 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2949
2950 /* now re-arm timer, if required */
2951 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2952 ev_timer_again (EV_A_ &w->timer);
2953 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2954 }
2955
2956 static void noinline
2957 infy_del (EV_P_ ev_stat *w)
2958 {
2959 int slot;
2960 int wd = w->wd;
2961
2962 if (wd < 0)
2963 return;
2964
2965 w->wd = -2;
2966 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2967 wlist_del (&fs_hash [slot].head, (WL)w);
2968
2969 /* remove this watcher, if others are watching it, they will rearm */
2970 inotify_rm_watch (fs_fd, wd);
2971 }
2972
2973 static void noinline
2974 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2975 {
2976 if (slot < 0)
2977 /* overflow, need to check for all hash slots */
2978 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2979 infy_wd (EV_A_ slot, wd, ev);
2980 else
2981 {
2982 WL w_;
2983
2984 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2985 {
2986 ev_stat *w = (ev_stat *)w_;
2987 w_ = w_->next; /* lets us remove this watcher and all before it */
2988
2989 if (w->wd == wd || wd == -1)
2990 {
2991 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2992 {
2993 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2994 w->wd = -1;
2995 infy_add (EV_A_ w); /* re-add, no matter what */
2996 }
2997
2998 stat_timer_cb (EV_A_ &w->timer, 0);
2999 }
3000 }
3001 }
3002 }
3003
3004 static void
3005 infy_cb (EV_P_ ev_io *w, int revents)
3006 {
3007 char buf [EV_INOTIFY_BUFSIZE];
3008 int ofs;
3009 int len = read (fs_fd, buf, sizeof (buf));
3010
3011 for (ofs = 0; ofs < len; )
3012 {
3013 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3014 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3015 ofs += sizeof (struct inotify_event) + ev->len;
3016 }
3017 }
3018
3019 inline_size unsigned int
3020 ev_linux_version (void)
3021 {
3022 struct utsname buf;
3023 unsigned int v;
3024 int i;
3025 char *p = buf.release;
3026
3027 if (uname (&buf))
3028 return 0;
3029
3030 for (i = 3+1; --i; )
3031 {
3032 unsigned int c = 0;
3033
3034 for (;;)
3035 {
3036 if (*p >= '0' && *p <= '9')
3037 c = c * 10 + *p++ - '0';
3038 else
3039 {
3040 p += *p == '.';
3041 break;
3042 }
3043 }
3044
3045 v = (v << 8) | c;
3046 }
3047
3048 return v;
3049 }
3050
3051 inline_size void
3052 ev_check_2625 (EV_P)
3053 {
3054 /* kernels < 2.6.25 are borked
3055 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3056 */
3057 if (ev_linux_version () < 0x020619)
3058 return;
3059
3060 fs_2625 = 1;
3061 }
3062
3063 inline_size int
3064 infy_newfd (void)
3065 {
3066 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3067 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3068 if (fd >= 0)
3069 return fd;
3070 #endif
3071 return inotify_init ();
3072 }
3073
3074 inline_size void
3075 infy_init (EV_P)
3076 {
3077 if (fs_fd != -2)
3078 return;
3079
3080 fs_fd = -1;
3081
3082 ev_check_2625 (EV_A);
3083
3084 fs_fd = infy_newfd ();
3085
3086 if (fs_fd >= 0)
3087 {
3088 fd_intern (fs_fd);
3089 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3090 ev_set_priority (&fs_w, EV_MAXPRI);
3091 ev_io_start (EV_A_ &fs_w);
3092 ev_unref (EV_A);
3093 }
3094 }
3095
3096 inline_size void
3097 infy_fork (EV_P)
3098 {
3099 int slot;
3100
3101 if (fs_fd < 0)
3102 return;
3103
3104 ev_ref (EV_A);
3105 ev_io_stop (EV_A_ &fs_w);
3106 close (fs_fd);
3107 fs_fd = infy_newfd ();
3108
3109 if (fs_fd >= 0)
3110 {
3111 fd_intern (fs_fd);
3112 ev_io_set (&fs_w, fs_fd, EV_READ);
3113 ev_io_start (EV_A_ &fs_w);
3114 ev_unref (EV_A);
3115 }
3116
3117 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3118 {
3119 WL w_ = fs_hash [slot].head;
3120 fs_hash [slot].head = 0;
3121
3122 while (w_)
3123 {
3124 ev_stat *w = (ev_stat *)w_;
3125 w_ = w_->next; /* lets us add this watcher */
3126
3127 w->wd = -1;
3128
3129 if (fs_fd >= 0)
3130 infy_add (EV_A_ w); /* re-add, no matter what */
3131 else
3132 {
3133 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3134 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3135 ev_timer_again (EV_A_ &w->timer);
3136 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3137 }
3138 }
3139 }
3140 }
3141
3142 #endif
3143
3144 #ifdef _WIN32
3145 # define EV_LSTAT(p,b) _stati64 (p, b)
3146 #else
3147 # define EV_LSTAT(p,b) lstat (p, b)
3148 #endif
3149
3150 void
3151 ev_stat_stat (EV_P_ ev_stat *w)
3152 {
3153 if (lstat (w->path, &w->attr) < 0)
3154 w->attr.st_nlink = 0;
3155 else if (!w->attr.st_nlink)
3156 w->attr.st_nlink = 1;
3157 }
3158
3159 static void noinline
3160 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3161 {
3162 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3163
3164 ev_statdata prev = w->attr;
3165 ev_stat_stat (EV_A_ w);
3166
3167 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3168 if (
3169 prev.st_dev != w->attr.st_dev
3170 || prev.st_ino != w->attr.st_ino
3171 || prev.st_mode != w->attr.st_mode
3172 || prev.st_nlink != w->attr.st_nlink
3173 || prev.st_uid != w->attr.st_uid
3174 || prev.st_gid != w->attr.st_gid
3175 || prev.st_rdev != w->attr.st_rdev
3176 || prev.st_size != w->attr.st_size
3177 || prev.st_atime != w->attr.st_atime
3178 || prev.st_mtime != w->attr.st_mtime
3179 || prev.st_ctime != w->attr.st_ctime
3180 ) {
3181 /* we only update w->prev on actual differences */
3182 /* in case we test more often than invoke the callback, */
3183 /* to ensure that prev is always different to attr */
3184 w->prev = prev;
3185
3186 #if EV_USE_INOTIFY
3187 if (fs_fd >= 0)
3188 {
3189 infy_del (EV_A_ w);
3190 infy_add (EV_A_ w);
3191 ev_stat_stat (EV_A_ w); /* avoid race... */
3192 }
3193 #endif
3194
3195 ev_feed_event (EV_A_ w, EV_STAT);
3196 }
3197 }
3198
3199 void
3200 ev_stat_start (EV_P_ ev_stat *w)
3201 {
3202 if (expect_false (ev_is_active (w)))
3203 return;
3204
3205 ev_stat_stat (EV_A_ w);
3206
3207 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3208 w->interval = MIN_STAT_INTERVAL;
3209
3210 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3211 ev_set_priority (&w->timer, ev_priority (w));
3212
3213 #if EV_USE_INOTIFY
3214 infy_init (EV_A);
3215
3216 if (fs_fd >= 0)
3217 infy_add (EV_A_ w);
3218 else
3219 #endif
3220 {
3221 ev_timer_again (EV_A_ &w->timer);
3222 ev_unref (EV_A);
3223 }
3224
3225 ev_start (EV_A_ (W)w, 1);
3226
3227 EV_FREQUENT_CHECK;
3228 }
3229
3230 void
3231 ev_stat_stop (EV_P_ ev_stat *w)
3232 {
3233 clear_pending (EV_A_ (W)w);
3234 if (expect_false (!ev_is_active (w)))
3235 return;
3236
3237 EV_FREQUENT_CHECK;
3238
3239 #if EV_USE_INOTIFY
3240 infy_del (EV_A_ w);
3241 #endif
3242
3243 if (ev_is_active (&w->timer))
3244 {
3245 ev_ref (EV_A);
3246 ev_timer_stop (EV_A_ &w->timer);
3247 }
3248
3249 ev_stop (EV_A_ (W)w);
3250
3251 EV_FREQUENT_CHECK;
3252 }
3253 #endif
3254
3255 #if EV_IDLE_ENABLE
3256 void
3257 ev_idle_start (EV_P_ ev_idle *w)
3258 {
3259 if (expect_false (ev_is_active (w)))
3260 return;
3261
3262 pri_adjust (EV_A_ (W)w);
3263
3264 EV_FREQUENT_CHECK;
3265
3266 {
3267 int active = ++idlecnt [ABSPRI (w)];
3268
3269 ++idleall;
3270 ev_start (EV_A_ (W)w, active);
3271
3272 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3273 idles [ABSPRI (w)][active - 1] = w;
3274 }
3275
3276 EV_FREQUENT_CHECK;
3277 }
3278
3279 void
3280 ev_idle_stop (EV_P_ ev_idle *w)
3281 {
3282 clear_pending (EV_A_ (W)w);
3283 if (expect_false (!ev_is_active (w)))
3284 return;
3285
3286 EV_FREQUENT_CHECK;
3287
3288 {
3289 int active = ev_active (w);
3290
3291 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3292 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3293
3294 ev_stop (EV_A_ (W)w);
3295 --idleall;
3296 }
3297
3298 EV_FREQUENT_CHECK;
3299 }
3300 #endif
3301
3302 void
3303 ev_prepare_start (EV_P_ ev_prepare *w)
3304 {
3305 if (expect_false (ev_is_active (w)))
3306 return;
3307
3308 EV_FREQUENT_CHECK;
3309
3310 ev_start (EV_A_ (W)w, ++preparecnt);
3311 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3312 prepares [preparecnt - 1] = w;
3313
3314 EV_FREQUENT_CHECK;
3315 }
3316
3317 void
3318 ev_prepare_stop (EV_P_ ev_prepare *w)
3319 {
3320 clear_pending (EV_A_ (W)w);
3321 if (expect_false (!ev_is_active (w)))
3322 return;
3323
3324 EV_FREQUENT_CHECK;
3325
3326 {
3327 int active = ev_active (w);
3328
3329 prepares [active - 1] = prepares [--preparecnt];
3330 ev_active (prepares [active - 1]) = active;
3331 }
3332
3333 ev_stop (EV_A_ (W)w);
3334
3335 EV_FREQUENT_CHECK;
3336 }
3337
3338 void
3339 ev_check_start (EV_P_ ev_check *w)
3340 {
3341 if (expect_false (ev_is_active (w)))
3342 return;
3343
3344 EV_FREQUENT_CHECK;
3345
3346 ev_start (EV_A_ (W)w, ++checkcnt);
3347 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3348 checks [checkcnt - 1] = w;
3349
3350 EV_FREQUENT_CHECK;
3351 }
3352
3353 void
3354 ev_check_stop (EV_P_ ev_check *w)
3355 {
3356 clear_pending (EV_A_ (W)w);
3357 if (expect_false (!ev_is_active (w)))
3358 return;
3359
3360 EV_FREQUENT_CHECK;
3361
3362 {
3363 int active = ev_active (w);
3364
3365 checks [active - 1] = checks [--checkcnt];
3366 ev_active (checks [active - 1]) = active;
3367 }
3368
3369 ev_stop (EV_A_ (W)w);
3370
3371 EV_FREQUENT_CHECK;
3372 }
3373
3374 #if EV_EMBED_ENABLE
3375 void noinline
3376 ev_embed_sweep (EV_P_ ev_embed *w)
3377 {
3378 ev_loop (w->other, EVLOOP_NONBLOCK);
3379 }
3380
3381 static void
3382 embed_io_cb (EV_P_ ev_io *io, int revents)
3383 {
3384 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3385
3386 if (ev_cb (w))
3387 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3388 else
3389 ev_loop (w->other, EVLOOP_NONBLOCK);
3390 }
3391
3392 static void
3393 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3394 {
3395 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3396
3397 {
3398 EV_P = w->other;
3399
3400 while (fdchangecnt)
3401 {
3402 fd_reify (EV_A);
3403 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3404 }
3405 }
3406 }
3407
3408 static void
3409 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3410 {
3411 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3412
3413 ev_embed_stop (EV_A_ w);
3414
3415 {
3416 EV_P = w->other;
3417
3418 ev_loop_fork (EV_A);
3419 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3420 }
3421
3422 ev_embed_start (EV_A_ w);
3423 }
3424
3425 #if 0
3426 static void
3427 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3428 {
3429 ev_idle_stop (EV_A_ idle);
3430 }
3431 #endif
3432
3433 void
3434 ev_embed_start (EV_P_ ev_embed *w)
3435 {
3436 if (expect_false (ev_is_active (w)))
3437 return;
3438
3439 {
3440 EV_P = w->other;
3441 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3442 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3443 }
3444
3445 EV_FREQUENT_CHECK;
3446
3447 ev_set_priority (&w->io, ev_priority (w));
3448 ev_io_start (EV_A_ &w->io);
3449
3450 ev_prepare_init (&w->prepare, embed_prepare_cb);
3451 ev_set_priority (&w->prepare, EV_MINPRI);
3452 ev_prepare_start (EV_A_ &w->prepare);
3453
3454 ev_fork_init (&w->fork, embed_fork_cb);
3455 ev_fork_start (EV_A_ &w->fork);
3456
3457 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3458
3459 ev_start (EV_A_ (W)w, 1);
3460
3461 EV_FREQUENT_CHECK;
3462 }
3463
3464 void
3465 ev_embed_stop (EV_P_ ev_embed *w)
3466 {
3467 clear_pending (EV_A_ (W)w);
3468 if (expect_false (!ev_is_active (w)))
3469 return;
3470
3471 EV_FREQUENT_CHECK;
3472
3473 ev_io_stop (EV_A_ &w->io);
3474 ev_prepare_stop (EV_A_ &w->prepare);
3475 ev_fork_stop (EV_A_ &w->fork);
3476
3477 ev_stop (EV_A_ (W)w);
3478
3479 EV_FREQUENT_CHECK;
3480 }
3481 #endif
3482
3483 #if EV_FORK_ENABLE
3484 void
3485 ev_fork_start (EV_P_ ev_fork *w)
3486 {
3487 if (expect_false (ev_is_active (w)))
3488 return;
3489
3490 EV_FREQUENT_CHECK;
3491
3492 ev_start (EV_A_ (W)w, ++forkcnt);
3493 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3494 forks [forkcnt - 1] = w;
3495
3496 EV_FREQUENT_CHECK;
3497 }
3498
3499 void
3500 ev_fork_stop (EV_P_ ev_fork *w)
3501 {
3502 clear_pending (EV_A_ (W)w);
3503 if (expect_false (!ev_is_active (w)))
3504 return;
3505
3506 EV_FREQUENT_CHECK;
3507
3508 {
3509 int active = ev_active (w);
3510
3511 forks [active - 1] = forks [--forkcnt];
3512 ev_active (forks [active - 1]) = active;
3513 }
3514
3515 ev_stop (EV_A_ (W)w);
3516
3517 EV_FREQUENT_CHECK;
3518 }
3519 #endif
3520
3521 #if EV_ASYNC_ENABLE
3522 void
3523 ev_async_start (EV_P_ ev_async *w)
3524 {
3525 if (expect_false (ev_is_active (w)))
3526 return;
3527
3528 evpipe_init (EV_A);
3529
3530 EV_FREQUENT_CHECK;
3531
3532 ev_start (EV_A_ (W)w, ++asynccnt);
3533 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3534 asyncs [asynccnt - 1] = w;
3535
3536 EV_FREQUENT_CHECK;
3537 }
3538
3539 void
3540 ev_async_stop (EV_P_ ev_async *w)
3541 {
3542 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w)))
3544 return;
3545
3546 EV_FREQUENT_CHECK;
3547
3548 {
3549 int active = ev_active (w);
3550
3551 asyncs [active - 1] = asyncs [--asynccnt];
3552 ev_active (asyncs [active - 1]) = active;
3553 }
3554
3555 ev_stop (EV_A_ (W)w);
3556
3557 EV_FREQUENT_CHECK;
3558 }
3559
3560 void
3561 ev_async_send (EV_P_ ev_async *w)
3562 {
3563 w->sent = 1;
3564 evpipe_write (EV_A_ &async_pending);
3565 }
3566 #endif
3567
3568 /*****************************************************************************/
3569
3570 struct ev_once
3571 {
3572 ev_io io;
3573 ev_timer to;
3574 void (*cb)(int revents, void *arg);
3575 void *arg;
3576 };
3577
3578 static void
3579 once_cb (EV_P_ struct ev_once *once, int revents)
3580 {
3581 void (*cb)(int revents, void *arg) = once->cb;
3582 void *arg = once->arg;
3583
3584 ev_io_stop (EV_A_ &once->io);
3585 ev_timer_stop (EV_A_ &once->to);
3586 ev_free (once);
3587
3588 cb (revents, arg);
3589 }
3590
3591 static void
3592 once_cb_io (EV_P_ ev_io *w, int revents)
3593 {
3594 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3595
3596 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3597 }
3598
3599 static void
3600 once_cb_to (EV_P_ ev_timer *w, int revents)
3601 {
3602 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3603
3604 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3605 }
3606
3607 void
3608 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3609 {
3610 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3611
3612 if (expect_false (!once))
3613 {
3614 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3615 return;
3616 }
3617
3618 once->cb = cb;
3619 once->arg = arg;
3620
3621 ev_init (&once->io, once_cb_io);
3622 if (fd >= 0)
3623 {
3624 ev_io_set (&once->io, fd, events);
3625 ev_io_start (EV_A_ &once->io);
3626 }
3627
3628 ev_init (&once->to, once_cb_to);
3629 if (timeout >= 0.)
3630 {
3631 ev_timer_set (&once->to, timeout, 0.);
3632 ev_timer_start (EV_A_ &once->to);
3633 }
3634 }
3635
3636 /*****************************************************************************/
3637
3638 #if EV_WALK_ENABLE
3639 void
3640 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3641 {
3642 int i, j;
3643 ev_watcher_list *wl, *wn;
3644
3645 if (types & (EV_IO | EV_EMBED))
3646 for (i = 0; i < anfdmax; ++i)
3647 for (wl = anfds [i].head; wl; )
3648 {
3649 wn = wl->next;
3650
3651 #if EV_EMBED_ENABLE
3652 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3653 {
3654 if (types & EV_EMBED)
3655 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3656 }
3657 else
3658 #endif
3659 #if EV_USE_INOTIFY
3660 if (ev_cb ((ev_io *)wl) == infy_cb)
3661 ;
3662 else
3663 #endif
3664 if ((ev_io *)wl != &pipe_w)
3665 if (types & EV_IO)
3666 cb (EV_A_ EV_IO, wl);
3667
3668 wl = wn;
3669 }
3670
3671 if (types & (EV_TIMER | EV_STAT))
3672 for (i = timercnt + HEAP0; i-- > HEAP0; )
3673 #if EV_STAT_ENABLE
3674 /*TODO: timer is not always active*/
3675 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3676 {
3677 if (types & EV_STAT)
3678 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3679 }
3680 else
3681 #endif
3682 if (types & EV_TIMER)
3683 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3684
3685 #if EV_PERIODIC_ENABLE
3686 if (types & EV_PERIODIC)
3687 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3688 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3689 #endif
3690
3691 #if EV_IDLE_ENABLE
3692 if (types & EV_IDLE)
3693 for (j = NUMPRI; i--; )
3694 for (i = idlecnt [j]; i--; )
3695 cb (EV_A_ EV_IDLE, idles [j][i]);
3696 #endif
3697
3698 #if EV_FORK_ENABLE
3699 if (types & EV_FORK)
3700 for (i = forkcnt; i--; )
3701 if (ev_cb (forks [i]) != embed_fork_cb)
3702 cb (EV_A_ EV_FORK, forks [i]);
3703 #endif
3704
3705 #if EV_ASYNC_ENABLE
3706 if (types & EV_ASYNC)
3707 for (i = asynccnt; i--; )
3708 cb (EV_A_ EV_ASYNC, asyncs [i]);
3709 #endif
3710
3711 if (types & EV_PREPARE)
3712 for (i = preparecnt; i--; )
3713 #if EV_EMBED_ENABLE
3714 if (ev_cb (prepares [i]) != embed_prepare_cb)
3715 #endif
3716 cb (EV_A_ EV_PREPARE, prepares [i]);
3717
3718 if (types & EV_CHECK)
3719 for (i = checkcnt; i--; )
3720 cb (EV_A_ EV_CHECK, checks [i]);
3721
3722 if (types & EV_SIGNAL)
3723 for (i = 0; i < EV_NSIG - 1; ++i)
3724 for (wl = signals [i].head; wl; )
3725 {
3726 wn = wl->next;
3727 cb (EV_A_ EV_SIGNAL, wl);
3728 wl = wn;
3729 }
3730
3731 if (types & EV_CHILD)
3732 for (i = EV_PID_HASHSIZE; i--; )
3733 for (wl = childs [i]; wl; )
3734 {
3735 wn = wl->next;
3736 cb (EV_A_ EV_CHILD, wl);
3737 wl = wn;
3738 }
3739 /* EV_STAT 0x00001000 /* stat data changed */
3740 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3741 }
3742 #endif
3743
3744 #if EV_MULTIPLICITY
3745 #include "ev_wrap.h"
3746 #endif
3747
3748 #ifdef __cplusplus
3749 }
3750 #endif
3751