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/cvs/libev/ev.c
Revision: 1.335
Committed: Tue Mar 9 09:02:03 2010 UTC (14 years, 4 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.334: +1 -1 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 #if __GLIBC__
574 return realloc (ptr, size);
575 #else
576 /* some systems, notably openbsd and darwin, fail to properly
577 * implement realloc (x, 0) (as required by both ansi c-89 and
578 * the single unix specification, so work around them here.
579 */
580
581 if (size)
582 return realloc (ptr, size);
583
584 free (ptr);
585 return 0;
586 #endif
587 }
588
589 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
590
591 void
592 ev_set_allocator (void *(*cb)(void *ptr, long size))
593 {
594 alloc = cb;
595 }
596
597 inline_speed void *
598 ev_realloc (void *ptr, long size)
599 {
600 ptr = alloc (ptr, size);
601
602 if (!ptr && size)
603 {
604 #if EV_AVOID_STDIO
605 ev_printerr ("libev: memory allocation failed, aborting.\n");
606 #else
607 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
608 #endif
609 abort ();
610 }
611
612 return ptr;
613 }
614
615 #define ev_malloc(size) ev_realloc (0, (size))
616 #define ev_free(ptr) ev_realloc ((ptr), 0)
617
618 /*****************************************************************************/
619
620 /* set in reify when reification needed */
621 #define EV_ANFD_REIFY 1
622
623 /* file descriptor info structure */
624 typedef struct
625 {
626 WL head;
627 unsigned char events; /* the events watched for */
628 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
629 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
630 unsigned char unused;
631 #if EV_USE_EPOLL
632 unsigned int egen; /* generation counter to counter epoll bugs */
633 #endif
634 #if EV_SELECT_IS_WINSOCKET
635 SOCKET handle;
636 #endif
637 } ANFD;
638
639 /* stores the pending event set for a given watcher */
640 typedef struct
641 {
642 W w;
643 int events; /* the pending event set for the given watcher */
644 } ANPENDING;
645
646 #if EV_USE_INOTIFY
647 /* hash table entry per inotify-id */
648 typedef struct
649 {
650 WL head;
651 } ANFS;
652 #endif
653
654 /* Heap Entry */
655 #if EV_HEAP_CACHE_AT
656 /* a heap element */
657 typedef struct {
658 ev_tstamp at;
659 WT w;
660 } ANHE;
661
662 #define ANHE_w(he) (he).w /* access watcher, read-write */
663 #define ANHE_at(he) (he).at /* access cached at, read-only */
664 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
665 #else
666 /* a heap element */
667 typedef WT ANHE;
668
669 #define ANHE_w(he) (he)
670 #define ANHE_at(he) (he)->at
671 #define ANHE_at_cache(he)
672 #endif
673
674 #if EV_MULTIPLICITY
675
676 struct ev_loop
677 {
678 ev_tstamp ev_rt_now;
679 #define ev_rt_now ((loop)->ev_rt_now)
680 #define VAR(name,decl) decl;
681 #include "ev_vars.h"
682 #undef VAR
683 };
684 #include "ev_wrap.h"
685
686 static struct ev_loop default_loop_struct;
687 struct ev_loop *ev_default_loop_ptr;
688
689 #else
690
691 ev_tstamp ev_rt_now;
692 #define VAR(name,decl) static decl;
693 #include "ev_vars.h"
694 #undef VAR
695
696 static int ev_default_loop_ptr;
697
698 #endif
699
700 #if EV_MINIMAL < 2
701 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
702 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
703 # define EV_INVOKE_PENDING invoke_cb (EV_A)
704 #else
705 # define EV_RELEASE_CB (void)0
706 # define EV_ACQUIRE_CB (void)0
707 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
708 #endif
709
710 #define EVUNLOOP_RECURSE 0x80
711
712 /*****************************************************************************/
713
714 #ifndef EV_HAVE_EV_TIME
715 ev_tstamp
716 ev_time (void)
717 {
718 #if EV_USE_REALTIME
719 if (expect_true (have_realtime))
720 {
721 struct timespec ts;
722 clock_gettime (CLOCK_REALTIME, &ts);
723 return ts.tv_sec + ts.tv_nsec * 1e-9;
724 }
725 #endif
726
727 struct timeval tv;
728 gettimeofday (&tv, 0);
729 return tv.tv_sec + tv.tv_usec * 1e-6;
730 }
731 #endif
732
733 inline_size ev_tstamp
734 get_clock (void)
735 {
736 #if EV_USE_MONOTONIC
737 if (expect_true (have_monotonic))
738 {
739 struct timespec ts;
740 clock_gettime (CLOCK_MONOTONIC, &ts);
741 return ts.tv_sec + ts.tv_nsec * 1e-9;
742 }
743 #endif
744
745 return ev_time ();
746 }
747
748 #if EV_MULTIPLICITY
749 ev_tstamp
750 ev_now (EV_P)
751 {
752 return ev_rt_now;
753 }
754 #endif
755
756 void
757 ev_sleep (ev_tstamp delay)
758 {
759 if (delay > 0.)
760 {
761 #if EV_USE_NANOSLEEP
762 struct timespec ts;
763
764 ts.tv_sec = (time_t)delay;
765 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
766
767 nanosleep (&ts, 0);
768 #elif defined(_WIN32)
769 Sleep ((unsigned long)(delay * 1e3));
770 #else
771 struct timeval tv;
772
773 tv.tv_sec = (time_t)delay;
774 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
775
776 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
777 /* something not guaranteed by newer posix versions, but guaranteed */
778 /* by older ones */
779 select (0, 0, 0, 0, &tv);
780 #endif
781 }
782 }
783
784 /*****************************************************************************/
785
786 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
787
788 /* find a suitable new size for the given array, */
789 /* hopefully by rounding to a ncie-to-malloc size */
790 inline_size int
791 array_nextsize (int elem, int cur, int cnt)
792 {
793 int ncur = cur + 1;
794
795 do
796 ncur <<= 1;
797 while (cnt > ncur);
798
799 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
800 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
801 {
802 ncur *= elem;
803 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
804 ncur = ncur - sizeof (void *) * 4;
805 ncur /= elem;
806 }
807
808 return ncur;
809 }
810
811 static noinline void *
812 array_realloc (int elem, void *base, int *cur, int cnt)
813 {
814 *cur = array_nextsize (elem, *cur, cnt);
815 return ev_realloc (base, elem * *cur);
816 }
817
818 #define array_init_zero(base,count) \
819 memset ((void *)(base), 0, sizeof (*(base)) * (count))
820
821 #define array_needsize(type,base,cur,cnt,init) \
822 if (expect_false ((cnt) > (cur))) \
823 { \
824 int ocur_ = (cur); \
825 (base) = (type *)array_realloc \
826 (sizeof (type), (base), &(cur), (cnt)); \
827 init ((base) + (ocur_), (cur) - ocur_); \
828 }
829
830 #if 0
831 #define array_slim(type,stem) \
832 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
833 { \
834 stem ## max = array_roundsize (stem ## cnt >> 1); \
835 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
836 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
837 }
838 #endif
839
840 #define array_free(stem, idx) \
841 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
842
843 /*****************************************************************************/
844
845 /* dummy callback for pending events */
846 static void noinline
847 pendingcb (EV_P_ ev_prepare *w, int revents)
848 {
849 }
850
851 void noinline
852 ev_feed_event (EV_P_ void *w, int revents)
853 {
854 W w_ = (W)w;
855 int pri = ABSPRI (w_);
856
857 if (expect_false (w_->pending))
858 pendings [pri][w_->pending - 1].events |= revents;
859 else
860 {
861 w_->pending = ++pendingcnt [pri];
862 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
863 pendings [pri][w_->pending - 1].w = w_;
864 pendings [pri][w_->pending - 1].events = revents;
865 }
866 }
867
868 inline_speed void
869 feed_reverse (EV_P_ W w)
870 {
871 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
872 rfeeds [rfeedcnt++] = w;
873 }
874
875 inline_size void
876 feed_reverse_done (EV_P_ int revents)
877 {
878 do
879 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
880 while (rfeedcnt);
881 }
882
883 inline_speed void
884 queue_events (EV_P_ W *events, int eventcnt, int type)
885 {
886 int i;
887
888 for (i = 0; i < eventcnt; ++i)
889 ev_feed_event (EV_A_ events [i], type);
890 }
891
892 /*****************************************************************************/
893
894 inline_speed void
895 fd_event_nc (EV_P_ int fd, int revents)
896 {
897 ANFD *anfd = anfds + fd;
898 ev_io *w;
899
900 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
901 {
902 int ev = w->events & revents;
903
904 if (ev)
905 ev_feed_event (EV_A_ (W)w, ev);
906 }
907 }
908
909 /* do not submit kernel events for fds that have reify set */
910 /* because that means they changed while we were polling for new events */
911 inline_speed void
912 fd_event (EV_P_ int fd, int revents)
913 {
914 ANFD *anfd = anfds + fd;
915
916 if (expect_true (!anfd->reify))
917 fd_event_nc (EV_A_ fd, revents);
918 }
919
920 void
921 ev_feed_fd_event (EV_P_ int fd, int revents)
922 {
923 if (fd >= 0 && fd < anfdmax)
924 fd_event_nc (EV_A_ fd, revents);
925 }
926
927 /* make sure the external fd watch events are in-sync */
928 /* with the kernel/libev internal state */
929 inline_size void
930 fd_reify (EV_P)
931 {
932 int i;
933
934 for (i = 0; i < fdchangecnt; ++i)
935 {
936 int fd = fdchanges [i];
937 ANFD *anfd = anfds + fd;
938 ev_io *w;
939
940 unsigned char events = 0;
941
942 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
943 events |= (unsigned char)w->events;
944
945 #if EV_SELECT_IS_WINSOCKET
946 if (events)
947 {
948 unsigned long arg;
949 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
950 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
951 }
952 #endif
953
954 {
955 unsigned char o_events = anfd->events;
956 unsigned char o_reify = anfd->reify;
957
958 anfd->reify = 0;
959 anfd->events = events;
960
961 if (o_events != events || o_reify & EV__IOFDSET)
962 backend_modify (EV_A_ fd, o_events, events);
963 }
964 }
965
966 fdchangecnt = 0;
967 }
968
969 /* something about the given fd changed */
970 inline_size void
971 fd_change (EV_P_ int fd, int flags)
972 {
973 unsigned char reify = anfds [fd].reify;
974 anfds [fd].reify |= flags;
975
976 if (expect_true (!reify))
977 {
978 ++fdchangecnt;
979 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
980 fdchanges [fdchangecnt - 1] = fd;
981 }
982 }
983
984 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
985 inline_speed void
986 fd_kill (EV_P_ int fd)
987 {
988 ev_io *w;
989
990 while ((w = (ev_io *)anfds [fd].head))
991 {
992 ev_io_stop (EV_A_ w);
993 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
994 }
995 }
996
997 /* check whether the given fd is atcually valid, for error recovery */
998 inline_size int
999 fd_valid (int fd)
1000 {
1001 #ifdef _WIN32
1002 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1003 #else
1004 return fcntl (fd, F_GETFD) != -1;
1005 #endif
1006 }
1007
1008 /* called on EBADF to verify fds */
1009 static void noinline
1010 fd_ebadf (EV_P)
1011 {
1012 int fd;
1013
1014 for (fd = 0; fd < anfdmax; ++fd)
1015 if (anfds [fd].events)
1016 if (!fd_valid (fd) && errno == EBADF)
1017 fd_kill (EV_A_ fd);
1018 }
1019
1020 /* called on ENOMEM in select/poll to kill some fds and retry */
1021 static void noinline
1022 fd_enomem (EV_P)
1023 {
1024 int fd;
1025
1026 for (fd = anfdmax; fd--; )
1027 if (anfds [fd].events)
1028 {
1029 fd_kill (EV_A_ fd);
1030 break;
1031 }
1032 }
1033
1034 /* usually called after fork if backend needs to re-arm all fds from scratch */
1035 static void noinline
1036 fd_rearm_all (EV_P)
1037 {
1038 int fd;
1039
1040 for (fd = 0; fd < anfdmax; ++fd)
1041 if (anfds [fd].events)
1042 {
1043 anfds [fd].events = 0;
1044 anfds [fd].emask = 0;
1045 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1046 }
1047 }
1048
1049 /*****************************************************************************/
1050
1051 /*
1052 * the heap functions want a real array index. array index 0 uis guaranteed to not
1053 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1054 * the branching factor of the d-tree.
1055 */
1056
1057 /*
1058 * at the moment we allow libev the luxury of two heaps,
1059 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1060 * which is more cache-efficient.
1061 * the difference is about 5% with 50000+ watchers.
1062 */
1063 #if EV_USE_4HEAP
1064
1065 #define DHEAP 4
1066 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1067 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1068 #define UPHEAP_DONE(p,k) ((p) == (k))
1069
1070 /* away from the root */
1071 inline_speed void
1072 downheap (ANHE *heap, int N, int k)
1073 {
1074 ANHE he = heap [k];
1075 ANHE *E = heap + N + HEAP0;
1076
1077 for (;;)
1078 {
1079 ev_tstamp minat;
1080 ANHE *minpos;
1081 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1082
1083 /* find minimum child */
1084 if (expect_true (pos + DHEAP - 1 < E))
1085 {
1086 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1087 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1088 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1089 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1090 }
1091 else if (pos < E)
1092 {
1093 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1094 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1095 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1096 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1097 }
1098 else
1099 break;
1100
1101 if (ANHE_at (he) <= minat)
1102 break;
1103
1104 heap [k] = *minpos;
1105 ev_active (ANHE_w (*minpos)) = k;
1106
1107 k = minpos - heap;
1108 }
1109
1110 heap [k] = he;
1111 ev_active (ANHE_w (he)) = k;
1112 }
1113
1114 #else /* 4HEAP */
1115
1116 #define HEAP0 1
1117 #define HPARENT(k) ((k) >> 1)
1118 #define UPHEAP_DONE(p,k) (!(p))
1119
1120 /* away from the root */
1121 inline_speed void
1122 downheap (ANHE *heap, int N, int k)
1123 {
1124 ANHE he = heap [k];
1125
1126 for (;;)
1127 {
1128 int c = k << 1;
1129
1130 if (c >= N + HEAP0)
1131 break;
1132
1133 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1134 ? 1 : 0;
1135
1136 if (ANHE_at (he) <= ANHE_at (heap [c]))
1137 break;
1138
1139 heap [k] = heap [c];
1140 ev_active (ANHE_w (heap [k])) = k;
1141
1142 k = c;
1143 }
1144
1145 heap [k] = he;
1146 ev_active (ANHE_w (he)) = k;
1147 }
1148 #endif
1149
1150 /* towards the root */
1151 inline_speed void
1152 upheap (ANHE *heap, int k)
1153 {
1154 ANHE he = heap [k];
1155
1156 for (;;)
1157 {
1158 int p = HPARENT (k);
1159
1160 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1161 break;
1162
1163 heap [k] = heap [p];
1164 ev_active (ANHE_w (heap [k])) = k;
1165 k = p;
1166 }
1167
1168 heap [k] = he;
1169 ev_active (ANHE_w (he)) = k;
1170 }
1171
1172 /* move an element suitably so it is in a correct place */
1173 inline_size void
1174 adjustheap (ANHE *heap, int N, int k)
1175 {
1176 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1177 upheap (heap, k);
1178 else
1179 downheap (heap, N, k);
1180 }
1181
1182 /* rebuild the heap: this function is used only once and executed rarely */
1183 inline_size void
1184 reheap (ANHE *heap, int N)
1185 {
1186 int i;
1187
1188 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1189 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1190 for (i = 0; i < N; ++i)
1191 upheap (heap, i + HEAP0);
1192 }
1193
1194 /*****************************************************************************/
1195
1196 /* associate signal watchers to a signal signal */
1197 typedef struct
1198 {
1199 EV_ATOMIC_T pending;
1200 #if EV_MULTIPLICITY
1201 EV_P;
1202 #endif
1203 WL head;
1204 } ANSIG;
1205
1206 static ANSIG signals [EV_NSIG - 1];
1207
1208 /*****************************************************************************/
1209
1210 /* used to prepare libev internal fd's */
1211 /* this is not fork-safe */
1212 inline_speed void
1213 fd_intern (int fd)
1214 {
1215 #ifdef _WIN32
1216 unsigned long arg = 1;
1217 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1218 #else
1219 fcntl (fd, F_SETFD, FD_CLOEXEC);
1220 fcntl (fd, F_SETFL, O_NONBLOCK);
1221 #endif
1222 }
1223
1224 static void noinline
1225 evpipe_init (EV_P)
1226 {
1227 if (!ev_is_active (&pipe_w))
1228 {
1229 #if EV_USE_EVENTFD
1230 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1231 if (evfd < 0 && errno == EINVAL)
1232 evfd = eventfd (0, 0);
1233
1234 if (evfd >= 0)
1235 {
1236 evpipe [0] = -1;
1237 fd_intern (evfd); /* doing it twice doesn't hurt */
1238 ev_io_set (&pipe_w, evfd, EV_READ);
1239 }
1240 else
1241 #endif
1242 {
1243 while (pipe (evpipe))
1244 ev_syserr ("(libev) error creating signal/async pipe");
1245
1246 fd_intern (evpipe [0]);
1247 fd_intern (evpipe [1]);
1248 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1249 }
1250
1251 ev_io_start (EV_A_ &pipe_w);
1252 ev_unref (EV_A); /* watcher should not keep loop alive */
1253 }
1254 }
1255
1256 inline_size void
1257 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1258 {
1259 if (!*flag)
1260 {
1261 int old_errno = errno; /* save errno because write might clobber it */
1262
1263 *flag = 1;
1264
1265 #if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272 #endif
1273 write (evpipe [1], &old_errno, 1);
1274
1275 errno = old_errno;
1276 }
1277 }
1278
1279 /* called whenever the libev signal pipe */
1280 /* got some events (signal, async) */
1281 static void
1282 pipecb (EV_P_ ev_io *iow, int revents)
1283 {
1284 int i;
1285
1286 #if EV_USE_EVENTFD
1287 if (evfd >= 0)
1288 {
1289 uint64_t counter;
1290 read (evfd, &counter, sizeof (uint64_t));
1291 }
1292 else
1293 #endif
1294 {
1295 char dummy;
1296 read (evpipe [0], &dummy, 1);
1297 }
1298
1299 if (sig_pending)
1300 {
1301 sig_pending = 0;
1302
1303 for (i = EV_NSIG - 1; i--; )
1304 if (expect_false (signals [i].pending))
1305 ev_feed_signal_event (EV_A_ i + 1);
1306 }
1307
1308 #if EV_ASYNC_ENABLE
1309 if (async_pending)
1310 {
1311 async_pending = 0;
1312
1313 for (i = asynccnt; i--; )
1314 if (asyncs [i]->sent)
1315 {
1316 asyncs [i]->sent = 0;
1317 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1318 }
1319 }
1320 #endif
1321 }
1322
1323 /*****************************************************************************/
1324
1325 static void
1326 ev_sighandler (int signum)
1327 {
1328 #if EV_MULTIPLICITY
1329 EV_P = signals [signum - 1].loop;
1330 #endif
1331
1332 #ifdef _WIN32
1333 signal (signum, ev_sighandler);
1334 #endif
1335
1336 signals [signum - 1].pending = 1;
1337 evpipe_write (EV_A_ &sig_pending);
1338 }
1339
1340 void noinline
1341 ev_feed_signal_event (EV_P_ int signum)
1342 {
1343 WL w;
1344
1345 if (expect_false (signum <= 0 || signum > EV_NSIG))
1346 return;
1347
1348 --signum;
1349
1350 #if EV_MULTIPLICITY
1351 /* it is permissible to try to feed a signal to the wrong loop */
1352 /* or, likely more useful, feeding a signal nobody is waiting for */
1353
1354 if (expect_false (signals [signum].loop != EV_A))
1355 return;
1356 #endif
1357
1358 signals [signum].pending = 0;
1359
1360 for (w = signals [signum].head; w; w = w->next)
1361 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1362 }
1363
1364 #if EV_USE_SIGNALFD
1365 static void
1366 sigfdcb (EV_P_ ev_io *iow, int revents)
1367 {
1368 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1369
1370 for (;;)
1371 {
1372 ssize_t res = read (sigfd, si, sizeof (si));
1373
1374 /* not ISO-C, as res might be -1, but works with SuS */
1375 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1376 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1377
1378 if (res < (ssize_t)sizeof (si))
1379 break;
1380 }
1381 }
1382 #endif
1383
1384 /*****************************************************************************/
1385
1386 static WL childs [EV_PID_HASHSIZE];
1387
1388 #ifndef _WIN32
1389
1390 static ev_signal childev;
1391
1392 #ifndef WIFCONTINUED
1393 # define WIFCONTINUED(status) 0
1394 #endif
1395
1396 /* handle a single child status event */
1397 inline_speed void
1398 child_reap (EV_P_ int chain, int pid, int status)
1399 {
1400 ev_child *w;
1401 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1402
1403 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1404 {
1405 if ((w->pid == pid || !w->pid)
1406 && (!traced || (w->flags & 1)))
1407 {
1408 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1409 w->rpid = pid;
1410 w->rstatus = status;
1411 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1412 }
1413 }
1414 }
1415
1416 #ifndef WCONTINUED
1417 # define WCONTINUED 0
1418 #endif
1419
1420 /* called on sigchld etc., calls waitpid */
1421 static void
1422 childcb (EV_P_ ev_signal *sw, int revents)
1423 {
1424 int pid, status;
1425
1426 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1427 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1428 if (!WCONTINUED
1429 || errno != EINVAL
1430 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1431 return;
1432
1433 /* make sure we are called again until all children have been reaped */
1434 /* we need to do it this way so that the callback gets called before we continue */
1435 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1436
1437 child_reap (EV_A_ pid, pid, status);
1438 if (EV_PID_HASHSIZE > 1)
1439 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1440 }
1441
1442 #endif
1443
1444 /*****************************************************************************/
1445
1446 #if EV_USE_PORT
1447 # include "ev_port.c"
1448 #endif
1449 #if EV_USE_KQUEUE
1450 # include "ev_kqueue.c"
1451 #endif
1452 #if EV_USE_EPOLL
1453 # include "ev_epoll.c"
1454 #endif
1455 #if EV_USE_POLL
1456 # include "ev_poll.c"
1457 #endif
1458 #if EV_USE_SELECT
1459 # include "ev_select.c"
1460 #endif
1461
1462 int
1463 ev_version_major (void)
1464 {
1465 return EV_VERSION_MAJOR;
1466 }
1467
1468 int
1469 ev_version_minor (void)
1470 {
1471 return EV_VERSION_MINOR;
1472 }
1473
1474 /* return true if we are running with elevated privileges and should ignore env variables */
1475 int inline_size
1476 enable_secure (void)
1477 {
1478 #ifdef _WIN32
1479 return 0;
1480 #else
1481 return getuid () != geteuid ()
1482 || getgid () != getegid ();
1483 #endif
1484 }
1485
1486 unsigned int
1487 ev_supported_backends (void)
1488 {
1489 unsigned int flags = 0;
1490
1491 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1492 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1493 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1494 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1495 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1496
1497 return flags;
1498 }
1499
1500 unsigned int
1501 ev_recommended_backends (void)
1502 {
1503 unsigned int flags = ev_supported_backends ();
1504
1505 #ifndef __NetBSD__
1506 /* kqueue is borked on everything but netbsd apparently */
1507 /* it usually doesn't work correctly on anything but sockets and pipes */
1508 flags &= ~EVBACKEND_KQUEUE;
1509 #endif
1510 #ifdef __APPLE__
1511 /* only select works correctly on that "unix-certified" platform */
1512 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1513 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1514 #endif
1515
1516 return flags;
1517 }
1518
1519 unsigned int
1520 ev_embeddable_backends (void)
1521 {
1522 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1523
1524 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1525 /* please fix it and tell me how to detect the fix */
1526 flags &= ~EVBACKEND_EPOLL;
1527
1528 return flags;
1529 }
1530
1531 unsigned int
1532 ev_backend (EV_P)
1533 {
1534 return backend;
1535 }
1536
1537 #if EV_MINIMAL < 2
1538 unsigned int
1539 ev_loop_count (EV_P)
1540 {
1541 return loop_count;
1542 }
1543
1544 unsigned int
1545 ev_loop_depth (EV_P)
1546 {
1547 return loop_depth;
1548 }
1549
1550 void
1551 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1552 {
1553 io_blocktime = interval;
1554 }
1555
1556 void
1557 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1558 {
1559 timeout_blocktime = interval;
1560 }
1561
1562 void
1563 ev_set_userdata (EV_P_ void *data)
1564 {
1565 userdata = data;
1566 }
1567
1568 void *
1569 ev_userdata (EV_P)
1570 {
1571 return userdata;
1572 }
1573
1574 void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1575 {
1576 invoke_cb = invoke_pending_cb;
1577 }
1578
1579 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1580 {
1581 release_cb = release;
1582 acquire_cb = acquire;
1583 }
1584 #endif
1585
1586 /* initialise a loop structure, must be zero-initialised */
1587 static void noinline
1588 loop_init (EV_P_ unsigned int flags)
1589 {
1590 if (!backend)
1591 {
1592 #if EV_USE_REALTIME
1593 if (!have_realtime)
1594 {
1595 struct timespec ts;
1596
1597 if (!clock_gettime (CLOCK_REALTIME, &ts))
1598 have_realtime = 1;
1599 }
1600 #endif
1601
1602 #if EV_USE_MONOTONIC
1603 if (!have_monotonic)
1604 {
1605 struct timespec ts;
1606
1607 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1608 have_monotonic = 1;
1609 }
1610 #endif
1611
1612 /* pid check not overridable via env */
1613 #ifndef _WIN32
1614 if (flags & EVFLAG_FORKCHECK)
1615 curpid = getpid ();
1616 #endif
1617
1618 if (!(flags & EVFLAG_NOENV)
1619 && !enable_secure ()
1620 && getenv ("LIBEV_FLAGS"))
1621 flags = atoi (getenv ("LIBEV_FLAGS"));
1622
1623 ev_rt_now = ev_time ();
1624 mn_now = get_clock ();
1625 now_floor = mn_now;
1626 rtmn_diff = ev_rt_now - mn_now;
1627 #if EV_MINIMAL < 2
1628 invoke_cb = ev_invoke_pending;
1629 #endif
1630
1631 io_blocktime = 0.;
1632 timeout_blocktime = 0.;
1633 backend = 0;
1634 backend_fd = -1;
1635 sig_pending = 0;
1636 #if EV_ASYNC_ENABLE
1637 async_pending = 0;
1638 #endif
1639 #if EV_USE_INOTIFY
1640 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1641 #endif
1642 #if EV_USE_SIGNALFD
1643 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1644 #endif
1645
1646 if (!(flags & 0x0000ffffU))
1647 flags |= ev_recommended_backends ();
1648
1649 #if EV_USE_PORT
1650 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1651 #endif
1652 #if EV_USE_KQUEUE
1653 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1654 #endif
1655 #if EV_USE_EPOLL
1656 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1657 #endif
1658 #if EV_USE_POLL
1659 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1660 #endif
1661 #if EV_USE_SELECT
1662 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1663 #endif
1664
1665 ev_prepare_init (&pending_w, pendingcb);
1666
1667 ev_init (&pipe_w, pipecb);
1668 ev_set_priority (&pipe_w, EV_MAXPRI);
1669 }
1670 }
1671
1672 /* free up a loop structure */
1673 static void noinline
1674 loop_destroy (EV_P)
1675 {
1676 int i;
1677
1678 if (ev_is_active (&pipe_w))
1679 {
1680 /*ev_ref (EV_A);*/
1681 /*ev_io_stop (EV_A_ &pipe_w);*/
1682
1683 #if EV_USE_EVENTFD
1684 if (evfd >= 0)
1685 close (evfd);
1686 #endif
1687
1688 if (evpipe [0] >= 0)
1689 {
1690 EV_WIN32_CLOSE_FD (evpipe [0]);
1691 EV_WIN32_CLOSE_FD (evpipe [1]);
1692 }
1693 }
1694
1695 #if EV_USE_SIGNALFD
1696 if (ev_is_active (&sigfd_w))
1697 close (sigfd);
1698 #endif
1699
1700 #if EV_USE_INOTIFY
1701 if (fs_fd >= 0)
1702 close (fs_fd);
1703 #endif
1704
1705 if (backend_fd >= 0)
1706 close (backend_fd);
1707
1708 #if EV_USE_PORT
1709 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1710 #endif
1711 #if EV_USE_KQUEUE
1712 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1713 #endif
1714 #if EV_USE_EPOLL
1715 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1716 #endif
1717 #if EV_USE_POLL
1718 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1719 #endif
1720 #if EV_USE_SELECT
1721 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1722 #endif
1723
1724 for (i = NUMPRI; i--; )
1725 {
1726 array_free (pending, [i]);
1727 #if EV_IDLE_ENABLE
1728 array_free (idle, [i]);
1729 #endif
1730 }
1731
1732 ev_free (anfds); anfds = 0; anfdmax = 0;
1733
1734 /* have to use the microsoft-never-gets-it-right macro */
1735 array_free (rfeed, EMPTY);
1736 array_free (fdchange, EMPTY);
1737 array_free (timer, EMPTY);
1738 #if EV_PERIODIC_ENABLE
1739 array_free (periodic, EMPTY);
1740 #endif
1741 #if EV_FORK_ENABLE
1742 array_free (fork, EMPTY);
1743 #endif
1744 array_free (prepare, EMPTY);
1745 array_free (check, EMPTY);
1746 #if EV_ASYNC_ENABLE
1747 array_free (async, EMPTY);
1748 #endif
1749
1750 backend = 0;
1751 }
1752
1753 #if EV_USE_INOTIFY
1754 inline_size void infy_fork (EV_P);
1755 #endif
1756
1757 inline_size void
1758 loop_fork (EV_P)
1759 {
1760 #if EV_USE_PORT
1761 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1762 #endif
1763 #if EV_USE_KQUEUE
1764 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1765 #endif
1766 #if EV_USE_EPOLL
1767 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1768 #endif
1769 #if EV_USE_INOTIFY
1770 infy_fork (EV_A);
1771 #endif
1772
1773 if (ev_is_active (&pipe_w))
1774 {
1775 /* this "locks" the handlers against writing to the pipe */
1776 /* while we modify the fd vars */
1777 sig_pending = 1;
1778 #if EV_ASYNC_ENABLE
1779 async_pending = 1;
1780 #endif
1781
1782 ev_ref (EV_A);
1783 ev_io_stop (EV_A_ &pipe_w);
1784
1785 #if EV_USE_EVENTFD
1786 if (evfd >= 0)
1787 close (evfd);
1788 #endif
1789
1790 if (evpipe [0] >= 0)
1791 {
1792 EV_WIN32_CLOSE_FD (evpipe [0]);
1793 EV_WIN32_CLOSE_FD (evpipe [1]);
1794 }
1795
1796 evpipe_init (EV_A);
1797 /* now iterate over everything, in case we missed something */
1798 pipecb (EV_A_ &pipe_w, EV_READ);
1799 }
1800
1801 postfork = 0;
1802 }
1803
1804 #if EV_MULTIPLICITY
1805
1806 struct ev_loop *
1807 ev_loop_new (unsigned int flags)
1808 {
1809 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1810
1811 memset (EV_A, 0, sizeof (struct ev_loop));
1812 loop_init (EV_A_ flags);
1813
1814 if (ev_backend (EV_A))
1815 return EV_A;
1816
1817 return 0;
1818 }
1819
1820 void
1821 ev_loop_destroy (EV_P)
1822 {
1823 loop_destroy (EV_A);
1824 ev_free (loop);
1825 }
1826
1827 void
1828 ev_loop_fork (EV_P)
1829 {
1830 postfork = 1; /* must be in line with ev_default_fork */
1831 }
1832 #endif /* multiplicity */
1833
1834 #if EV_VERIFY
1835 static void noinline
1836 verify_watcher (EV_P_ W w)
1837 {
1838 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1839
1840 if (w->pending)
1841 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1842 }
1843
1844 static void noinline
1845 verify_heap (EV_P_ ANHE *heap, int N)
1846 {
1847 int i;
1848
1849 for (i = HEAP0; i < N + HEAP0; ++i)
1850 {
1851 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1852 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1853 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1854
1855 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1856 }
1857 }
1858
1859 static void noinline
1860 array_verify (EV_P_ W *ws, int cnt)
1861 {
1862 while (cnt--)
1863 {
1864 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1865 verify_watcher (EV_A_ ws [cnt]);
1866 }
1867 }
1868 #endif
1869
1870 #if EV_MINIMAL < 2
1871 void
1872 ev_loop_verify (EV_P)
1873 {
1874 #if EV_VERIFY
1875 int i;
1876 WL w;
1877
1878 assert (activecnt >= -1);
1879
1880 assert (fdchangemax >= fdchangecnt);
1881 for (i = 0; i < fdchangecnt; ++i)
1882 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1883
1884 assert (anfdmax >= 0);
1885 for (i = 0; i < anfdmax; ++i)
1886 for (w = anfds [i].head; w; w = w->next)
1887 {
1888 verify_watcher (EV_A_ (W)w);
1889 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1890 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1891 }
1892
1893 assert (timermax >= timercnt);
1894 verify_heap (EV_A_ timers, timercnt);
1895
1896 #if EV_PERIODIC_ENABLE
1897 assert (periodicmax >= periodiccnt);
1898 verify_heap (EV_A_ periodics, periodiccnt);
1899 #endif
1900
1901 for (i = NUMPRI; i--; )
1902 {
1903 assert (pendingmax [i] >= pendingcnt [i]);
1904 #if EV_IDLE_ENABLE
1905 assert (idleall >= 0);
1906 assert (idlemax [i] >= idlecnt [i]);
1907 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1908 #endif
1909 }
1910
1911 #if EV_FORK_ENABLE
1912 assert (forkmax >= forkcnt);
1913 array_verify (EV_A_ (W *)forks, forkcnt);
1914 #endif
1915
1916 #if EV_ASYNC_ENABLE
1917 assert (asyncmax >= asynccnt);
1918 array_verify (EV_A_ (W *)asyncs, asynccnt);
1919 #endif
1920
1921 assert (preparemax >= preparecnt);
1922 array_verify (EV_A_ (W *)prepares, preparecnt);
1923
1924 assert (checkmax >= checkcnt);
1925 array_verify (EV_A_ (W *)checks, checkcnt);
1926
1927 # if 0
1928 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1929 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1930 # endif
1931 #endif
1932 }
1933 #endif
1934
1935 #if EV_MULTIPLICITY
1936 struct ev_loop *
1937 ev_default_loop_init (unsigned int flags)
1938 #else
1939 int
1940 ev_default_loop (unsigned int flags)
1941 #endif
1942 {
1943 if (!ev_default_loop_ptr)
1944 {
1945 #if EV_MULTIPLICITY
1946 EV_P = ev_default_loop_ptr = &default_loop_struct;
1947 #else
1948 ev_default_loop_ptr = 1;
1949 #endif
1950
1951 loop_init (EV_A_ flags);
1952
1953 if (ev_backend (EV_A))
1954 {
1955 #ifndef _WIN32
1956 ev_signal_init (&childev, childcb, SIGCHLD);
1957 ev_set_priority (&childev, EV_MAXPRI);
1958 ev_signal_start (EV_A_ &childev);
1959 ev_unref (EV_A); /* child watcher should not keep loop alive */
1960 #endif
1961 }
1962 else
1963 ev_default_loop_ptr = 0;
1964 }
1965
1966 return ev_default_loop_ptr;
1967 }
1968
1969 void
1970 ev_default_destroy (void)
1971 {
1972 #if EV_MULTIPLICITY
1973 EV_P = ev_default_loop_ptr;
1974 #endif
1975
1976 ev_default_loop_ptr = 0;
1977
1978 #ifndef _WIN32
1979 ev_ref (EV_A); /* child watcher */
1980 ev_signal_stop (EV_A_ &childev);
1981 #endif
1982
1983 loop_destroy (EV_A);
1984 }
1985
1986 void
1987 ev_default_fork (void)
1988 {
1989 #if EV_MULTIPLICITY
1990 EV_P = ev_default_loop_ptr;
1991 #endif
1992
1993 postfork = 1; /* must be in line with ev_loop_fork */
1994 }
1995
1996 /*****************************************************************************/
1997
1998 void
1999 ev_invoke (EV_P_ void *w, int revents)
2000 {
2001 EV_CB_INVOKE ((W)w, revents);
2002 }
2003
2004 unsigned int
2005 ev_pending_count (EV_P)
2006 {
2007 int pri;
2008 unsigned int count = 0;
2009
2010 for (pri = NUMPRI; pri--; )
2011 count += pendingcnt [pri];
2012
2013 return count;
2014 }
2015
2016 void noinline
2017 ev_invoke_pending (EV_P)
2018 {
2019 int pri;
2020
2021 for (pri = NUMPRI; pri--; )
2022 while (pendingcnt [pri])
2023 {
2024 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2025
2026 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2027 /* ^ this is no longer true, as pending_w could be here */
2028
2029 p->w->pending = 0;
2030 EV_CB_INVOKE (p->w, p->events);
2031 EV_FREQUENT_CHECK;
2032 }
2033 }
2034
2035 #if EV_IDLE_ENABLE
2036 /* make idle watchers pending. this handles the "call-idle */
2037 /* only when higher priorities are idle" logic */
2038 inline_size void
2039 idle_reify (EV_P)
2040 {
2041 if (expect_false (idleall))
2042 {
2043 int pri;
2044
2045 for (pri = NUMPRI; pri--; )
2046 {
2047 if (pendingcnt [pri])
2048 break;
2049
2050 if (idlecnt [pri])
2051 {
2052 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2053 break;
2054 }
2055 }
2056 }
2057 }
2058 #endif
2059
2060 /* make timers pending */
2061 inline_size void
2062 timers_reify (EV_P)
2063 {
2064 EV_FREQUENT_CHECK;
2065
2066 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2067 {
2068 do
2069 {
2070 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2071
2072 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2073
2074 /* first reschedule or stop timer */
2075 if (w->repeat)
2076 {
2077 ev_at (w) += w->repeat;
2078 if (ev_at (w) < mn_now)
2079 ev_at (w) = mn_now;
2080
2081 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2082
2083 ANHE_at_cache (timers [HEAP0]);
2084 downheap (timers, timercnt, HEAP0);
2085 }
2086 else
2087 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2088
2089 EV_FREQUENT_CHECK;
2090 feed_reverse (EV_A_ (W)w);
2091 }
2092 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2093
2094 feed_reverse_done (EV_A_ EV_TIMEOUT);
2095 }
2096 }
2097
2098 #if EV_PERIODIC_ENABLE
2099 /* make periodics pending */
2100 inline_size void
2101 periodics_reify (EV_P)
2102 {
2103 EV_FREQUENT_CHECK;
2104
2105 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2106 {
2107 int feed_count = 0;
2108
2109 do
2110 {
2111 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2112
2113 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2114
2115 /* first reschedule or stop timer */
2116 if (w->reschedule_cb)
2117 {
2118 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2119
2120 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2121
2122 ANHE_at_cache (periodics [HEAP0]);
2123 downheap (periodics, periodiccnt, HEAP0);
2124 }
2125 else if (w->interval)
2126 {
2127 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2128 /* if next trigger time is not sufficiently in the future, put it there */
2129 /* this might happen because of floating point inexactness */
2130 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2131 {
2132 ev_at (w) += w->interval;
2133
2134 /* if interval is unreasonably low we might still have a time in the past */
2135 /* so correct this. this will make the periodic very inexact, but the user */
2136 /* has effectively asked to get triggered more often than possible */
2137 if (ev_at (w) < ev_rt_now)
2138 ev_at (w) = ev_rt_now;
2139 }
2140
2141 ANHE_at_cache (periodics [HEAP0]);
2142 downheap (periodics, periodiccnt, HEAP0);
2143 }
2144 else
2145 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2146
2147 EV_FREQUENT_CHECK;
2148 feed_reverse (EV_A_ (W)w);
2149 }
2150 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2151
2152 feed_reverse_done (EV_A_ EV_PERIODIC);
2153 }
2154 }
2155
2156 /* simply recalculate all periodics */
2157 /* TODO: maybe ensure that at leats one event happens when jumping forward? */
2158 static void noinline
2159 periodics_reschedule (EV_P)
2160 {
2161 int i;
2162
2163 /* adjust periodics after time jump */
2164 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2165 {
2166 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2167
2168 if (w->reschedule_cb)
2169 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2170 else if (w->interval)
2171 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2172
2173 ANHE_at_cache (periodics [i]);
2174 }
2175
2176 reheap (periodics, periodiccnt);
2177 }
2178 #endif
2179
2180 /* adjust all timers by a given offset */
2181 static void noinline
2182 timers_reschedule (EV_P_ ev_tstamp adjust)
2183 {
2184 int i;
2185
2186 for (i = 0; i < timercnt; ++i)
2187 {
2188 ANHE *he = timers + i + HEAP0;
2189 ANHE_w (*he)->at += adjust;
2190 ANHE_at_cache (*he);
2191 }
2192 }
2193
2194 /* fetch new monotonic and realtime times from the kernel */
2195 /* also detect if there was a timejump, and act accordingly */
2196 inline_speed void
2197 time_update (EV_P_ ev_tstamp max_block)
2198 {
2199 #if EV_USE_MONOTONIC
2200 if (expect_true (have_monotonic))
2201 {
2202 int i;
2203 ev_tstamp odiff = rtmn_diff;
2204
2205 mn_now = get_clock ();
2206
2207 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2208 /* interpolate in the meantime */
2209 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2210 {
2211 ev_rt_now = rtmn_diff + mn_now;
2212 return;
2213 }
2214
2215 now_floor = mn_now;
2216 ev_rt_now = ev_time ();
2217
2218 /* loop a few times, before making important decisions.
2219 * on the choice of "4": one iteration isn't enough,
2220 * in case we get preempted during the calls to
2221 * ev_time and get_clock. a second call is almost guaranteed
2222 * to succeed in that case, though. and looping a few more times
2223 * doesn't hurt either as we only do this on time-jumps or
2224 * in the unlikely event of having been preempted here.
2225 */
2226 for (i = 4; --i; )
2227 {
2228 rtmn_diff = ev_rt_now - mn_now;
2229
2230 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2231 return; /* all is well */
2232
2233 ev_rt_now = ev_time ();
2234 mn_now = get_clock ();
2235 now_floor = mn_now;
2236 }
2237
2238 /* no timer adjustment, as the monotonic clock doesn't jump */
2239 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2240 # if EV_PERIODIC_ENABLE
2241 periodics_reschedule (EV_A);
2242 # endif
2243 }
2244 else
2245 #endif
2246 {
2247 ev_rt_now = ev_time ();
2248
2249 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2250 {
2251 /* adjust timers. this is easy, as the offset is the same for all of them */
2252 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2253 #if EV_PERIODIC_ENABLE
2254 periodics_reschedule (EV_A);
2255 #endif
2256 }
2257
2258 mn_now = ev_rt_now;
2259 }
2260 }
2261
2262 void
2263 ev_loop (EV_P_ int flags)
2264 {
2265 #if EV_MINIMAL < 2
2266 ++loop_depth;
2267 #endif
2268
2269 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2270
2271 loop_done = EVUNLOOP_CANCEL;
2272
2273 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2274
2275 do
2276 {
2277 #if EV_VERIFY >= 2
2278 ev_loop_verify (EV_A);
2279 #endif
2280
2281 #ifndef _WIN32
2282 if (expect_false (curpid)) /* penalise the forking check even more */
2283 if (expect_false (getpid () != curpid))
2284 {
2285 curpid = getpid ();
2286 postfork = 1;
2287 }
2288 #endif
2289
2290 #if EV_FORK_ENABLE
2291 /* we might have forked, so queue fork handlers */
2292 if (expect_false (postfork))
2293 if (forkcnt)
2294 {
2295 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2296 EV_INVOKE_PENDING;
2297 }
2298 #endif
2299
2300 /* queue prepare watchers (and execute them) */
2301 if (expect_false (preparecnt))
2302 {
2303 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2304 EV_INVOKE_PENDING;
2305 }
2306
2307 if (expect_false (loop_done))
2308 break;
2309
2310 /* we might have forked, so reify kernel state if necessary */
2311 if (expect_false (postfork))
2312 loop_fork (EV_A);
2313
2314 /* update fd-related kernel structures */
2315 fd_reify (EV_A);
2316
2317 /* calculate blocking time */
2318 {
2319 ev_tstamp waittime = 0.;
2320 ev_tstamp sleeptime = 0.;
2321
2322 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2323 {
2324 /* remember old timestamp for io_blocktime calculation */
2325 ev_tstamp prev_mn_now = mn_now;
2326
2327 /* update time to cancel out callback processing overhead */
2328 time_update (EV_A_ 1e100);
2329
2330 waittime = MAX_BLOCKTIME;
2331
2332 if (timercnt)
2333 {
2334 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2335 if (waittime > to) waittime = to;
2336 }
2337
2338 #if EV_PERIODIC_ENABLE
2339 if (periodiccnt)
2340 {
2341 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2342 if (waittime > to) waittime = to;
2343 }
2344 #endif
2345
2346 /* don't let timeouts decrease the waittime below timeout_blocktime */
2347 if (expect_false (waittime < timeout_blocktime))
2348 waittime = timeout_blocktime;
2349
2350 /* extra check because io_blocktime is commonly 0 */
2351 if (expect_false (io_blocktime))
2352 {
2353 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2354
2355 if (sleeptime > waittime - backend_fudge)
2356 sleeptime = waittime - backend_fudge;
2357
2358 if (expect_true (sleeptime > 0.))
2359 {
2360 ev_sleep (sleeptime);
2361 waittime -= sleeptime;
2362 }
2363 }
2364 }
2365
2366 #if EV_MINIMAL < 2
2367 ++loop_count;
2368 #endif
2369 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2370 backend_poll (EV_A_ waittime);
2371 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2372
2373 /* update ev_rt_now, do magic */
2374 time_update (EV_A_ waittime + sleeptime);
2375 }
2376
2377 /* queue pending timers and reschedule them */
2378 timers_reify (EV_A); /* relative timers called last */
2379 #if EV_PERIODIC_ENABLE
2380 periodics_reify (EV_A); /* absolute timers called first */
2381 #endif
2382
2383 #if EV_IDLE_ENABLE
2384 /* queue idle watchers unless other events are pending */
2385 idle_reify (EV_A);
2386 #endif
2387
2388 /* queue check watchers, to be executed first */
2389 if (expect_false (checkcnt))
2390 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2391
2392 EV_INVOKE_PENDING;
2393 }
2394 while (expect_true (
2395 activecnt
2396 && !loop_done
2397 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2398 ));
2399
2400 if (loop_done == EVUNLOOP_ONE)
2401 loop_done = EVUNLOOP_CANCEL;
2402
2403 #if EV_MINIMAL < 2
2404 --loop_depth;
2405 #endif
2406 }
2407
2408 void
2409 ev_unloop (EV_P_ int how)
2410 {
2411 loop_done = how;
2412 }
2413
2414 void
2415 ev_ref (EV_P)
2416 {
2417 ++activecnt;
2418 }
2419
2420 void
2421 ev_unref (EV_P)
2422 {
2423 --activecnt;
2424 }
2425
2426 void
2427 ev_now_update (EV_P)
2428 {
2429 time_update (EV_A_ 1e100);
2430 }
2431
2432 void
2433 ev_suspend (EV_P)
2434 {
2435 ev_now_update (EV_A);
2436 }
2437
2438 void
2439 ev_resume (EV_P)
2440 {
2441 ev_tstamp mn_prev = mn_now;
2442
2443 ev_now_update (EV_A);
2444 timers_reschedule (EV_A_ mn_now - mn_prev);
2445 #if EV_PERIODIC_ENABLE
2446 /* TODO: really do this? */
2447 periodics_reschedule (EV_A);
2448 #endif
2449 }
2450
2451 /*****************************************************************************/
2452 /* singly-linked list management, used when the expected list length is short */
2453
2454 inline_size void
2455 wlist_add (WL *head, WL elem)
2456 {
2457 elem->next = *head;
2458 *head = elem;
2459 }
2460
2461 inline_size void
2462 wlist_del (WL *head, WL elem)
2463 {
2464 while (*head)
2465 {
2466 if (expect_true (*head == elem))
2467 {
2468 *head = elem->next;
2469 break;
2470 }
2471
2472 head = &(*head)->next;
2473 }
2474 }
2475
2476 /* internal, faster, version of ev_clear_pending */
2477 inline_speed void
2478 clear_pending (EV_P_ W w)
2479 {
2480 if (w->pending)
2481 {
2482 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2483 w->pending = 0;
2484 }
2485 }
2486
2487 int
2488 ev_clear_pending (EV_P_ void *w)
2489 {
2490 W w_ = (W)w;
2491 int pending = w_->pending;
2492
2493 if (expect_true (pending))
2494 {
2495 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2496 p->w = (W)&pending_w;
2497 w_->pending = 0;
2498 return p->events;
2499 }
2500 else
2501 return 0;
2502 }
2503
2504 inline_size void
2505 pri_adjust (EV_P_ W w)
2506 {
2507 int pri = ev_priority (w);
2508 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2509 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2510 ev_set_priority (w, pri);
2511 }
2512
2513 inline_speed void
2514 ev_start (EV_P_ W w, int active)
2515 {
2516 pri_adjust (EV_A_ w);
2517 w->active = active;
2518 ev_ref (EV_A);
2519 }
2520
2521 inline_size void
2522 ev_stop (EV_P_ W w)
2523 {
2524 ev_unref (EV_A);
2525 w->active = 0;
2526 }
2527
2528 /*****************************************************************************/
2529
2530 void noinline
2531 ev_io_start (EV_P_ ev_io *w)
2532 {
2533 int fd = w->fd;
2534
2535 if (expect_false (ev_is_active (w)))
2536 return;
2537
2538 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2539 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2540
2541 EV_FREQUENT_CHECK;
2542
2543 ev_start (EV_A_ (W)w, 1);
2544 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2545 wlist_add (&anfds[fd].head, (WL)w);
2546
2547 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2548 w->events &= ~EV__IOFDSET;
2549
2550 EV_FREQUENT_CHECK;
2551 }
2552
2553 void noinline
2554 ev_io_stop (EV_P_ ev_io *w)
2555 {
2556 clear_pending (EV_A_ (W)w);
2557 if (expect_false (!ev_is_active (w)))
2558 return;
2559
2560 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2561
2562 EV_FREQUENT_CHECK;
2563
2564 wlist_del (&anfds[w->fd].head, (WL)w);
2565 ev_stop (EV_A_ (W)w);
2566
2567 fd_change (EV_A_ w->fd, 1);
2568
2569 EV_FREQUENT_CHECK;
2570 }
2571
2572 void noinline
2573 ev_timer_start (EV_P_ ev_timer *w)
2574 {
2575 if (expect_false (ev_is_active (w)))
2576 return;
2577
2578 ev_at (w) += mn_now;
2579
2580 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2581
2582 EV_FREQUENT_CHECK;
2583
2584 ++timercnt;
2585 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2586 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2587 ANHE_w (timers [ev_active (w)]) = (WT)w;
2588 ANHE_at_cache (timers [ev_active (w)]);
2589 upheap (timers, ev_active (w));
2590
2591 EV_FREQUENT_CHECK;
2592
2593 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2594 }
2595
2596 void noinline
2597 ev_timer_stop (EV_P_ ev_timer *w)
2598 {
2599 clear_pending (EV_A_ (W)w);
2600 if (expect_false (!ev_is_active (w)))
2601 return;
2602
2603 EV_FREQUENT_CHECK;
2604
2605 {
2606 int active = ev_active (w);
2607
2608 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2609
2610 --timercnt;
2611
2612 if (expect_true (active < timercnt + HEAP0))
2613 {
2614 timers [active] = timers [timercnt + HEAP0];
2615 adjustheap (timers, timercnt, active);
2616 }
2617 }
2618
2619 ev_at (w) -= mn_now;
2620
2621 ev_stop (EV_A_ (W)w);
2622
2623 EV_FREQUENT_CHECK;
2624 }
2625
2626 void noinline
2627 ev_timer_again (EV_P_ ev_timer *w)
2628 {
2629 EV_FREQUENT_CHECK;
2630
2631 if (ev_is_active (w))
2632 {
2633 if (w->repeat)
2634 {
2635 ev_at (w) = mn_now + w->repeat;
2636 ANHE_at_cache (timers [ev_active (w)]);
2637 adjustheap (timers, timercnt, ev_active (w));
2638 }
2639 else
2640 ev_timer_stop (EV_A_ w);
2641 }
2642 else if (w->repeat)
2643 {
2644 ev_at (w) = w->repeat;
2645 ev_timer_start (EV_A_ w);
2646 }
2647
2648 EV_FREQUENT_CHECK;
2649 }
2650
2651 ev_tstamp
2652 ev_timer_remaining (EV_P_ ev_timer *w)
2653 {
2654 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2655 }
2656
2657 #if EV_PERIODIC_ENABLE
2658 void noinline
2659 ev_periodic_start (EV_P_ ev_periodic *w)
2660 {
2661 if (expect_false (ev_is_active (w)))
2662 return;
2663
2664 if (w->reschedule_cb)
2665 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2666 else if (w->interval)
2667 {
2668 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2669 /* this formula differs from the one in periodic_reify because we do not always round up */
2670 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2671 }
2672 else
2673 ev_at (w) = w->offset;
2674
2675 EV_FREQUENT_CHECK;
2676
2677 ++periodiccnt;
2678 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2679 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2680 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2681 ANHE_at_cache (periodics [ev_active (w)]);
2682 upheap (periodics, ev_active (w));
2683
2684 EV_FREQUENT_CHECK;
2685
2686 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2687 }
2688
2689 void noinline
2690 ev_periodic_stop (EV_P_ ev_periodic *w)
2691 {
2692 clear_pending (EV_A_ (W)w);
2693 if (expect_false (!ev_is_active (w)))
2694 return;
2695
2696 EV_FREQUENT_CHECK;
2697
2698 {
2699 int active = ev_active (w);
2700
2701 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2702
2703 --periodiccnt;
2704
2705 if (expect_true (active < periodiccnt + HEAP0))
2706 {
2707 periodics [active] = periodics [periodiccnt + HEAP0];
2708 adjustheap (periodics, periodiccnt, active);
2709 }
2710 }
2711
2712 ev_stop (EV_A_ (W)w);
2713
2714 EV_FREQUENT_CHECK;
2715 }
2716
2717 void noinline
2718 ev_periodic_again (EV_P_ ev_periodic *w)
2719 {
2720 /* TODO: use adjustheap and recalculation */
2721 ev_periodic_stop (EV_A_ w);
2722 ev_periodic_start (EV_A_ w);
2723 }
2724 #endif
2725
2726 #ifndef SA_RESTART
2727 # define SA_RESTART 0
2728 #endif
2729
2730 void noinline
2731 ev_signal_start (EV_P_ ev_signal *w)
2732 {
2733 if (expect_false (ev_is_active (w)))
2734 return;
2735
2736 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2737
2738 #if EV_MULTIPLICITY
2739 assert (("libev: a signal must not be attached to two different loops",
2740 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2741
2742 signals [w->signum - 1].loop = EV_A;
2743 #endif
2744
2745 EV_FREQUENT_CHECK;
2746
2747 #if EV_USE_SIGNALFD
2748 if (sigfd == -2)
2749 {
2750 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2751 if (sigfd < 0 && errno == EINVAL)
2752 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2753
2754 if (sigfd >= 0)
2755 {
2756 fd_intern (sigfd); /* doing it twice will not hurt */
2757
2758 sigemptyset (&sigfd_set);
2759
2760 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2761 ev_set_priority (&sigfd_w, EV_MAXPRI);
2762 ev_io_start (EV_A_ &sigfd_w);
2763 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2764 }
2765 }
2766
2767 if (sigfd >= 0)
2768 {
2769 /* TODO: check .head */
2770 sigaddset (&sigfd_set, w->signum);
2771 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2772
2773 signalfd (sigfd, &sigfd_set, 0);
2774 }
2775 #endif
2776
2777 ev_start (EV_A_ (W)w, 1);
2778 wlist_add (&signals [w->signum - 1].head, (WL)w);
2779
2780 if (!((WL)w)->next)
2781 # if EV_USE_SIGNALFD
2782 if (sigfd < 0) /*TODO*/
2783 # endif
2784 {
2785 # ifdef _WIN32
2786 evpipe_init (EV_A);
2787
2788 signal (w->signum, ev_sighandler);
2789 # else
2790 struct sigaction sa;
2791
2792 evpipe_init (EV_A);
2793
2794 sa.sa_handler = ev_sighandler;
2795 sigfillset (&sa.sa_mask);
2796 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2797 sigaction (w->signum, &sa, 0);
2798
2799 sigemptyset (&sa.sa_mask);
2800 sigaddset (&sa.sa_mask, w->signum);
2801 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2802 #endif
2803 }
2804
2805 EV_FREQUENT_CHECK;
2806 }
2807
2808 void noinline
2809 ev_signal_stop (EV_P_ ev_signal *w)
2810 {
2811 clear_pending (EV_A_ (W)w);
2812 if (expect_false (!ev_is_active (w)))
2813 return;
2814
2815 EV_FREQUENT_CHECK;
2816
2817 wlist_del (&signals [w->signum - 1].head, (WL)w);
2818 ev_stop (EV_A_ (W)w);
2819
2820 if (!signals [w->signum - 1].head)
2821 {
2822 #if EV_MULTIPLICITY
2823 signals [w->signum - 1].loop = 0; /* unattach from signal */
2824 #endif
2825 #if EV_USE_SIGNALFD
2826 if (sigfd >= 0)
2827 {
2828 sigset_t ss;
2829
2830 sigemptyset (&ss);
2831 sigaddset (&ss, w->signum);
2832 sigdelset (&sigfd_set, w->signum);
2833
2834 signalfd (sigfd, &sigfd_set, 0);
2835 sigprocmask (SIG_UNBLOCK, &ss, 0);
2836 }
2837 else
2838 #endif
2839 signal (w->signum, SIG_DFL);
2840 }
2841
2842 EV_FREQUENT_CHECK;
2843 }
2844
2845 void
2846 ev_child_start (EV_P_ ev_child *w)
2847 {
2848 #if EV_MULTIPLICITY
2849 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2850 #endif
2851 if (expect_false (ev_is_active (w)))
2852 return;
2853
2854 EV_FREQUENT_CHECK;
2855
2856 ev_start (EV_A_ (W)w, 1);
2857 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2858
2859 EV_FREQUENT_CHECK;
2860 }
2861
2862 void
2863 ev_child_stop (EV_P_ ev_child *w)
2864 {
2865 clear_pending (EV_A_ (W)w);
2866 if (expect_false (!ev_is_active (w)))
2867 return;
2868
2869 EV_FREQUENT_CHECK;
2870
2871 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2872 ev_stop (EV_A_ (W)w);
2873
2874 EV_FREQUENT_CHECK;
2875 }
2876
2877 #if EV_STAT_ENABLE
2878
2879 # ifdef _WIN32
2880 # undef lstat
2881 # define lstat(a,b) _stati64 (a,b)
2882 # endif
2883
2884 #define DEF_STAT_INTERVAL 5.0074891
2885 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2886 #define MIN_STAT_INTERVAL 0.1074891
2887
2888 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2889
2890 #if EV_USE_INOTIFY
2891
2892 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2893 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2894
2895 static void noinline
2896 infy_add (EV_P_ ev_stat *w)
2897 {
2898 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);
2899
2900 if (w->wd >= 0)
2901 {
2902 struct statfs sfs;
2903
2904 /* now local changes will be tracked by inotify, but remote changes won't */
2905 /* unless the filesystem is known to be local, we therefore still poll */
2906 /* also do poll on <2.6.25, but with normal frequency */
2907
2908 if (!fs_2625)
2909 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2910 else if (!statfs (w->path, &sfs)
2911 && (sfs.f_type == 0x1373 /* devfs */
2912 || sfs.f_type == 0xEF53 /* ext2/3 */
2913 || sfs.f_type == 0x3153464a /* jfs */
2914 || sfs.f_type == 0x52654973 /* reiser3 */
2915 || sfs.f_type == 0x01021994 /* tempfs */
2916 || sfs.f_type == 0x58465342 /* xfs */))
2917 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2918 else
2919 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2920 }
2921 else
2922 {
2923 /* can't use inotify, continue to stat */
2924 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2925
2926 /* if path is not there, monitor some parent directory for speedup hints */
2927 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2928 /* but an efficiency issue only */
2929 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2930 {
2931 char path [4096];
2932 strcpy (path, w->path);
2933
2934 do
2935 {
2936 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2937 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2938
2939 char *pend = strrchr (path, '/');
2940
2941 if (!pend || pend == path)
2942 break;
2943
2944 *pend = 0;
2945 w->wd = inotify_add_watch (fs_fd, path, mask);
2946 }
2947 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2948 }
2949 }
2950
2951 if (w->wd >= 0)
2952 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2953
2954 /* now re-arm timer, if required */
2955 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2956 ev_timer_again (EV_A_ &w->timer);
2957 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2958 }
2959
2960 static void noinline
2961 infy_del (EV_P_ ev_stat *w)
2962 {
2963 int slot;
2964 int wd = w->wd;
2965
2966 if (wd < 0)
2967 return;
2968
2969 w->wd = -2;
2970 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2971 wlist_del (&fs_hash [slot].head, (WL)w);
2972
2973 /* remove this watcher, if others are watching it, they will rearm */
2974 inotify_rm_watch (fs_fd, wd);
2975 }
2976
2977 static void noinline
2978 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2979 {
2980 if (slot < 0)
2981 /* overflow, need to check for all hash slots */
2982 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2983 infy_wd (EV_A_ slot, wd, ev);
2984 else
2985 {
2986 WL w_;
2987
2988 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2989 {
2990 ev_stat *w = (ev_stat *)w_;
2991 w_ = w_->next; /* lets us remove this watcher and all before it */
2992
2993 if (w->wd == wd || wd == -1)
2994 {
2995 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2996 {
2997 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2998 w->wd = -1;
2999 infy_add (EV_A_ w); /* re-add, no matter what */
3000 }
3001
3002 stat_timer_cb (EV_A_ &w->timer, 0);
3003 }
3004 }
3005 }
3006 }
3007
3008 static void
3009 infy_cb (EV_P_ ev_io *w, int revents)
3010 {
3011 char buf [EV_INOTIFY_BUFSIZE];
3012 int ofs;
3013 int len = read (fs_fd, buf, sizeof (buf));
3014
3015 for (ofs = 0; ofs < len; )
3016 {
3017 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3018 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3019 ofs += sizeof (struct inotify_event) + ev->len;
3020 }
3021 }
3022
3023 inline_size unsigned int
3024 ev_linux_version (void)
3025 {
3026 struct utsname buf;
3027 unsigned int v;
3028 int i;
3029 char *p = buf.release;
3030
3031 if (uname (&buf))
3032 return 0;
3033
3034 for (i = 3+1; --i; )
3035 {
3036 unsigned int c = 0;
3037
3038 for (;;)
3039 {
3040 if (*p >= '0' && *p <= '9')
3041 c = c * 10 + *p++ - '0';
3042 else
3043 {
3044 p += *p == '.';
3045 break;
3046 }
3047 }
3048
3049 v = (v << 8) | c;
3050 }
3051
3052 return v;
3053 }
3054
3055 inline_size void
3056 ev_check_2625 (EV_P)
3057 {
3058 /* kernels < 2.6.25 are borked
3059 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3060 */
3061 if (ev_linux_version () < 0x020619)
3062 return;
3063
3064 fs_2625 = 1;
3065 }
3066
3067 inline_size int
3068 infy_newfd (void)
3069 {
3070 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3071 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3072 if (fd >= 0)
3073 return fd;
3074 #endif
3075 return inotify_init ();
3076 }
3077
3078 inline_size void
3079 infy_init (EV_P)
3080 {
3081 if (fs_fd != -2)
3082 return;
3083
3084 fs_fd = -1;
3085
3086 ev_check_2625 (EV_A);
3087
3088 fs_fd = infy_newfd ();
3089
3090 if (fs_fd >= 0)
3091 {
3092 fd_intern (fs_fd);
3093 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3094 ev_set_priority (&fs_w, EV_MAXPRI);
3095 ev_io_start (EV_A_ &fs_w);
3096 ev_unref (EV_A);
3097 }
3098 }
3099
3100 inline_size void
3101 infy_fork (EV_P)
3102 {
3103 int slot;
3104
3105 if (fs_fd < 0)
3106 return;
3107
3108 ev_ref (EV_A);
3109 ev_io_stop (EV_A_ &fs_w);
3110 close (fs_fd);
3111 fs_fd = infy_newfd ();
3112
3113 if (fs_fd >= 0)
3114 {
3115 fd_intern (fs_fd);
3116 ev_io_set (&fs_w, fs_fd, EV_READ);
3117 ev_io_start (EV_A_ &fs_w);
3118 ev_unref (EV_A);
3119 }
3120
3121 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3122 {
3123 WL w_ = fs_hash [slot].head;
3124 fs_hash [slot].head = 0;
3125
3126 while (w_)
3127 {
3128 ev_stat *w = (ev_stat *)w_;
3129 w_ = w_->next; /* lets us add this watcher */
3130
3131 w->wd = -1;
3132
3133 if (fs_fd >= 0)
3134 infy_add (EV_A_ w); /* re-add, no matter what */
3135 else
3136 {
3137 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3138 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3139 ev_timer_again (EV_A_ &w->timer);
3140 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3141 }
3142 }
3143 }
3144 }
3145
3146 #endif
3147
3148 #ifdef _WIN32
3149 # define EV_LSTAT(p,b) _stati64 (p, b)
3150 #else
3151 # define EV_LSTAT(p,b) lstat (p, b)
3152 #endif
3153
3154 void
3155 ev_stat_stat (EV_P_ ev_stat *w)
3156 {
3157 if (lstat (w->path, &w->attr) < 0)
3158 w->attr.st_nlink = 0;
3159 else if (!w->attr.st_nlink)
3160 w->attr.st_nlink = 1;
3161 }
3162
3163 static void noinline
3164 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3165 {
3166 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3167
3168 ev_statdata prev = w->attr;
3169 ev_stat_stat (EV_A_ w);
3170
3171 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3172 if (
3173 prev.st_dev != w->attr.st_dev
3174 || prev.st_ino != w->attr.st_ino
3175 || prev.st_mode != w->attr.st_mode
3176 || prev.st_nlink != w->attr.st_nlink
3177 || prev.st_uid != w->attr.st_uid
3178 || prev.st_gid != w->attr.st_gid
3179 || prev.st_rdev != w->attr.st_rdev
3180 || prev.st_size != w->attr.st_size
3181 || prev.st_atime != w->attr.st_atime
3182 || prev.st_mtime != w->attr.st_mtime
3183 || prev.st_ctime != w->attr.st_ctime
3184 ) {
3185 /* we only update w->prev on actual differences */
3186 /* in case we test more often than invoke the callback, */
3187 /* to ensure that prev is always different to attr */
3188 w->prev = prev;
3189
3190 #if EV_USE_INOTIFY
3191 if (fs_fd >= 0)
3192 {
3193 infy_del (EV_A_ w);
3194 infy_add (EV_A_ w);
3195 ev_stat_stat (EV_A_ w); /* avoid race... */
3196 }
3197 #endif
3198
3199 ev_feed_event (EV_A_ w, EV_STAT);
3200 }
3201 }
3202
3203 void
3204 ev_stat_start (EV_P_ ev_stat *w)
3205 {
3206 if (expect_false (ev_is_active (w)))
3207 return;
3208
3209 ev_stat_stat (EV_A_ w);
3210
3211 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3212 w->interval = MIN_STAT_INTERVAL;
3213
3214 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3215 ev_set_priority (&w->timer, ev_priority (w));
3216
3217 #if EV_USE_INOTIFY
3218 infy_init (EV_A);
3219
3220 if (fs_fd >= 0)
3221 infy_add (EV_A_ w);
3222 else
3223 #endif
3224 {
3225 ev_timer_again (EV_A_ &w->timer);
3226 ev_unref (EV_A);
3227 }
3228
3229 ev_start (EV_A_ (W)w, 1);
3230
3231 EV_FREQUENT_CHECK;
3232 }
3233
3234 void
3235 ev_stat_stop (EV_P_ ev_stat *w)
3236 {
3237 clear_pending (EV_A_ (W)w);
3238 if (expect_false (!ev_is_active (w)))
3239 return;
3240
3241 EV_FREQUENT_CHECK;
3242
3243 #if EV_USE_INOTIFY
3244 infy_del (EV_A_ w);
3245 #endif
3246
3247 if (ev_is_active (&w->timer))
3248 {
3249 ev_ref (EV_A);
3250 ev_timer_stop (EV_A_ &w->timer);
3251 }
3252
3253 ev_stop (EV_A_ (W)w);
3254
3255 EV_FREQUENT_CHECK;
3256 }
3257 #endif
3258
3259 #if EV_IDLE_ENABLE
3260 void
3261 ev_idle_start (EV_P_ ev_idle *w)
3262 {
3263 if (expect_false (ev_is_active (w)))
3264 return;
3265
3266 pri_adjust (EV_A_ (W)w);
3267
3268 EV_FREQUENT_CHECK;
3269
3270 {
3271 int active = ++idlecnt [ABSPRI (w)];
3272
3273 ++idleall;
3274 ev_start (EV_A_ (W)w, active);
3275
3276 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3277 idles [ABSPRI (w)][active - 1] = w;
3278 }
3279
3280 EV_FREQUENT_CHECK;
3281 }
3282
3283 void
3284 ev_idle_stop (EV_P_ ev_idle *w)
3285 {
3286 clear_pending (EV_A_ (W)w);
3287 if (expect_false (!ev_is_active (w)))
3288 return;
3289
3290 EV_FREQUENT_CHECK;
3291
3292 {
3293 int active = ev_active (w);
3294
3295 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3296 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3297
3298 ev_stop (EV_A_ (W)w);
3299 --idleall;
3300 }
3301
3302 EV_FREQUENT_CHECK;
3303 }
3304 #endif
3305
3306 void
3307 ev_prepare_start (EV_P_ ev_prepare *w)
3308 {
3309 if (expect_false (ev_is_active (w)))
3310 return;
3311
3312 EV_FREQUENT_CHECK;
3313
3314 ev_start (EV_A_ (W)w, ++preparecnt);
3315 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3316 prepares [preparecnt - 1] = w;
3317
3318 EV_FREQUENT_CHECK;
3319 }
3320
3321 void
3322 ev_prepare_stop (EV_P_ ev_prepare *w)
3323 {
3324 clear_pending (EV_A_ (W)w);
3325 if (expect_false (!ev_is_active (w)))
3326 return;
3327
3328 EV_FREQUENT_CHECK;
3329
3330 {
3331 int active = ev_active (w);
3332
3333 prepares [active - 1] = prepares [--preparecnt];
3334 ev_active (prepares [active - 1]) = active;
3335 }
3336
3337 ev_stop (EV_A_ (W)w);
3338
3339 EV_FREQUENT_CHECK;
3340 }
3341
3342 void
3343 ev_check_start (EV_P_ ev_check *w)
3344 {
3345 if (expect_false (ev_is_active (w)))
3346 return;
3347
3348 EV_FREQUENT_CHECK;
3349
3350 ev_start (EV_A_ (W)w, ++checkcnt);
3351 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3352 checks [checkcnt - 1] = w;
3353
3354 EV_FREQUENT_CHECK;
3355 }
3356
3357 void
3358 ev_check_stop (EV_P_ ev_check *w)
3359 {
3360 clear_pending (EV_A_ (W)w);
3361 if (expect_false (!ev_is_active (w)))
3362 return;
3363
3364 EV_FREQUENT_CHECK;
3365
3366 {
3367 int active = ev_active (w);
3368
3369 checks [active - 1] = checks [--checkcnt];
3370 ev_active (checks [active - 1]) = active;
3371 }
3372
3373 ev_stop (EV_A_ (W)w);
3374
3375 EV_FREQUENT_CHECK;
3376 }
3377
3378 #if EV_EMBED_ENABLE
3379 void noinline
3380 ev_embed_sweep (EV_P_ ev_embed *w)
3381 {
3382 ev_loop (w->other, EVLOOP_NONBLOCK);
3383 }
3384
3385 static void
3386 embed_io_cb (EV_P_ ev_io *io, int revents)
3387 {
3388 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3389
3390 if (ev_cb (w))
3391 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3392 else
3393 ev_loop (w->other, EVLOOP_NONBLOCK);
3394 }
3395
3396 static void
3397 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3398 {
3399 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3400
3401 {
3402 EV_P = w->other;
3403
3404 while (fdchangecnt)
3405 {
3406 fd_reify (EV_A);
3407 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3408 }
3409 }
3410 }
3411
3412 static void
3413 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3414 {
3415 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3416
3417 ev_embed_stop (EV_A_ w);
3418
3419 {
3420 EV_P = w->other;
3421
3422 ev_loop_fork (EV_A);
3423 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3424 }
3425
3426 ev_embed_start (EV_A_ w);
3427 }
3428
3429 #if 0
3430 static void
3431 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3432 {
3433 ev_idle_stop (EV_A_ idle);
3434 }
3435 #endif
3436
3437 void
3438 ev_embed_start (EV_P_ ev_embed *w)
3439 {
3440 if (expect_false (ev_is_active (w)))
3441 return;
3442
3443 {
3444 EV_P = w->other;
3445 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3446 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3447 }
3448
3449 EV_FREQUENT_CHECK;
3450
3451 ev_set_priority (&w->io, ev_priority (w));
3452 ev_io_start (EV_A_ &w->io);
3453
3454 ev_prepare_init (&w->prepare, embed_prepare_cb);
3455 ev_set_priority (&w->prepare, EV_MINPRI);
3456 ev_prepare_start (EV_A_ &w->prepare);
3457
3458 ev_fork_init (&w->fork, embed_fork_cb);
3459 ev_fork_start (EV_A_ &w->fork);
3460
3461 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3462
3463 ev_start (EV_A_ (W)w, 1);
3464
3465 EV_FREQUENT_CHECK;
3466 }
3467
3468 void
3469 ev_embed_stop (EV_P_ ev_embed *w)
3470 {
3471 clear_pending (EV_A_ (W)w);
3472 if (expect_false (!ev_is_active (w)))
3473 return;
3474
3475 EV_FREQUENT_CHECK;
3476
3477 ev_io_stop (EV_A_ &w->io);
3478 ev_prepare_stop (EV_A_ &w->prepare);
3479 ev_fork_stop (EV_A_ &w->fork);
3480
3481 ev_stop (EV_A_ (W)w);
3482
3483 EV_FREQUENT_CHECK;
3484 }
3485 #endif
3486
3487 #if EV_FORK_ENABLE
3488 void
3489 ev_fork_start (EV_P_ ev_fork *w)
3490 {
3491 if (expect_false (ev_is_active (w)))
3492 return;
3493
3494 EV_FREQUENT_CHECK;
3495
3496 ev_start (EV_A_ (W)w, ++forkcnt);
3497 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3498 forks [forkcnt - 1] = w;
3499
3500 EV_FREQUENT_CHECK;
3501 }
3502
3503 void
3504 ev_fork_stop (EV_P_ ev_fork *w)
3505 {
3506 clear_pending (EV_A_ (W)w);
3507 if (expect_false (!ev_is_active (w)))
3508 return;
3509
3510 EV_FREQUENT_CHECK;
3511
3512 {
3513 int active = ev_active (w);
3514
3515 forks [active - 1] = forks [--forkcnt];
3516 ev_active (forks [active - 1]) = active;
3517 }
3518
3519 ev_stop (EV_A_ (W)w);
3520
3521 EV_FREQUENT_CHECK;
3522 }
3523 #endif
3524
3525 #if EV_ASYNC_ENABLE
3526 void
3527 ev_async_start (EV_P_ ev_async *w)
3528 {
3529 if (expect_false (ev_is_active (w)))
3530 return;
3531
3532 evpipe_init (EV_A);
3533
3534 EV_FREQUENT_CHECK;
3535
3536 ev_start (EV_A_ (W)w, ++asynccnt);
3537 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3538 asyncs [asynccnt - 1] = w;
3539
3540 EV_FREQUENT_CHECK;
3541 }
3542
3543 void
3544 ev_async_stop (EV_P_ ev_async *w)
3545 {
3546 clear_pending (EV_A_ (W)w);
3547 if (expect_false (!ev_is_active (w)))
3548 return;
3549
3550 EV_FREQUENT_CHECK;
3551
3552 {
3553 int active = ev_active (w);
3554
3555 asyncs [active - 1] = asyncs [--asynccnt];
3556 ev_active (asyncs [active - 1]) = active;
3557 }
3558
3559 ev_stop (EV_A_ (W)w);
3560
3561 EV_FREQUENT_CHECK;
3562 }
3563
3564 void
3565 ev_async_send (EV_P_ ev_async *w)
3566 {
3567 w->sent = 1;
3568 evpipe_write (EV_A_ &async_pending);
3569 }
3570 #endif
3571
3572 /*****************************************************************************/
3573
3574 struct ev_once
3575 {
3576 ev_io io;
3577 ev_timer to;
3578 void (*cb)(int revents, void *arg);
3579 void *arg;
3580 };
3581
3582 static void
3583 once_cb (EV_P_ struct ev_once *once, int revents)
3584 {
3585 void (*cb)(int revents, void *arg) = once->cb;
3586 void *arg = once->arg;
3587
3588 ev_io_stop (EV_A_ &once->io);
3589 ev_timer_stop (EV_A_ &once->to);
3590 ev_free (once);
3591
3592 cb (revents, arg);
3593 }
3594
3595 static void
3596 once_cb_io (EV_P_ ev_io *w, int revents)
3597 {
3598 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3599
3600 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3601 }
3602
3603 static void
3604 once_cb_to (EV_P_ ev_timer *w, int revents)
3605 {
3606 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3607
3608 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3609 }
3610
3611 void
3612 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3613 {
3614 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3615
3616 if (expect_false (!once))
3617 {
3618 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3619 return;
3620 }
3621
3622 once->cb = cb;
3623 once->arg = arg;
3624
3625 ev_init (&once->io, once_cb_io);
3626 if (fd >= 0)
3627 {
3628 ev_io_set (&once->io, fd, events);
3629 ev_io_start (EV_A_ &once->io);
3630 }
3631
3632 ev_init (&once->to, once_cb_to);
3633 if (timeout >= 0.)
3634 {
3635 ev_timer_set (&once->to, timeout, 0.);
3636 ev_timer_start (EV_A_ &once->to);
3637 }
3638 }
3639
3640 /*****************************************************************************/
3641
3642 #if EV_WALK_ENABLE
3643 void
3644 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3645 {
3646 int i, j;
3647 ev_watcher_list *wl, *wn;
3648
3649 if (types & (EV_IO | EV_EMBED))
3650 for (i = 0; i < anfdmax; ++i)
3651 for (wl = anfds [i].head; wl; )
3652 {
3653 wn = wl->next;
3654
3655 #if EV_EMBED_ENABLE
3656 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3657 {
3658 if (types & EV_EMBED)
3659 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3660 }
3661 else
3662 #endif
3663 #if EV_USE_INOTIFY
3664 if (ev_cb ((ev_io *)wl) == infy_cb)
3665 ;
3666 else
3667 #endif
3668 if ((ev_io *)wl != &pipe_w)
3669 if (types & EV_IO)
3670 cb (EV_A_ EV_IO, wl);
3671
3672 wl = wn;
3673 }
3674
3675 if (types & (EV_TIMER | EV_STAT))
3676 for (i = timercnt + HEAP0; i-- > HEAP0; )
3677 #if EV_STAT_ENABLE
3678 /*TODO: timer is not always active*/
3679 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3680 {
3681 if (types & EV_STAT)
3682 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3683 }
3684 else
3685 #endif
3686 if (types & EV_TIMER)
3687 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3688
3689 #if EV_PERIODIC_ENABLE
3690 if (types & EV_PERIODIC)
3691 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3692 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3693 #endif
3694
3695 #if EV_IDLE_ENABLE
3696 if (types & EV_IDLE)
3697 for (j = NUMPRI; i--; )
3698 for (i = idlecnt [j]; i--; )
3699 cb (EV_A_ EV_IDLE, idles [j][i]);
3700 #endif
3701
3702 #if EV_FORK_ENABLE
3703 if (types & EV_FORK)
3704 for (i = forkcnt; i--; )
3705 if (ev_cb (forks [i]) != embed_fork_cb)
3706 cb (EV_A_ EV_FORK, forks [i]);
3707 #endif
3708
3709 #if EV_ASYNC_ENABLE
3710 if (types & EV_ASYNC)
3711 for (i = asynccnt; i--; )
3712 cb (EV_A_ EV_ASYNC, asyncs [i]);
3713 #endif
3714
3715 if (types & EV_PREPARE)
3716 for (i = preparecnt; i--; )
3717 #if EV_EMBED_ENABLE
3718 if (ev_cb (prepares [i]) != embed_prepare_cb)
3719 #endif
3720 cb (EV_A_ EV_PREPARE, prepares [i]);
3721
3722 if (types & EV_CHECK)
3723 for (i = checkcnt; i--; )
3724 cb (EV_A_ EV_CHECK, checks [i]);
3725
3726 if (types & EV_SIGNAL)
3727 for (i = 0; i < EV_NSIG - 1; ++i)
3728 for (wl = signals [i].head; wl; )
3729 {
3730 wn = wl->next;
3731 cb (EV_A_ EV_SIGNAL, wl);
3732 wl = wn;
3733 }
3734
3735 if (types & EV_CHILD)
3736 for (i = EV_PID_HASHSIZE; i--; )
3737 for (wl = childs [i]; wl; )
3738 {
3739 wn = wl->next;
3740 cb (EV_A_ EV_CHILD, wl);
3741 wl = wn;
3742 }
3743 /* EV_STAT 0x00001000 /* stat data changed */
3744 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3745 }
3746 #endif
3747
3748 #if EV_MULTIPLICITY
3749 #include "ev_wrap.h"
3750 #endif
3751
3752 #ifdef __cplusplus
3753 }
3754 #endif
3755