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Revision: 1.349
Committed: Fri Oct 15 22:59:59 2010 UTC (13 years, 9 months ago) by sf-exg
Content type: text/plain
Branch: MAIN
Changes since 1.348: +1 -1 lines
Log Message:
Fix last change.

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 # if HAVE_NANOSLEEP
83 # ifndef EV_USE_NANOSLEEP
84 # define EV_USE_NANOSLEEP EV_FEATURE_OS
85 # endif
86 # else
87 # undef EV_USE_NANOSLEEP
88 # define EV_USE_NANOSLEEP 0
89 # endif
90
91 # if HAVE_SELECT && HAVE_SYS_SELECT_H
92 # ifndef EV_USE_SELECT
93 # define EV_USE_SELECT EV_FEATURE_BACKENDS
94 # endif
95 # else
96 # undef EV_USE_SELECT
97 # define EV_USE_SELECT 0
98 # endif
99
100 # if HAVE_POLL && HAVE_POLL_H
101 # ifndef EV_USE_POLL
102 # define EV_USE_POLL EV_FEATURE_BACKENDS
103 # endif
104 # else
105 # undef EV_USE_POLL
106 # define EV_USE_POLL 0
107 # endif
108
109 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
110 # ifndef EV_USE_EPOLL
111 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
112 # endif
113 # else
114 # undef EV_USE_EPOLL
115 # define EV_USE_EPOLL 0
116 # endif
117
118 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H
119 # ifndef EV_USE_KQUEUE
120 # define EV_USE_KQUEUE EV_FEATURE_BACKENDS
121 # endif
122 # else
123 # undef EV_USE_KQUEUE
124 # define EV_USE_KQUEUE 0
125 # endif
126
127 # if HAVE_PORT_H && HAVE_PORT_CREATE
128 # ifndef EV_USE_PORT
129 # define EV_USE_PORT EV_FEATURE_BACKENDS
130 # endif
131 # else
132 # undef EV_USE_PORT
133 # define EV_USE_PORT 0
134 # endif
135
136 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
137 # ifndef EV_USE_INOTIFY
138 # define EV_USE_INOTIFY EV_FEATURE_OS
139 # endif
140 # else
141 # undef EV_USE_INOTIFY
142 # define EV_USE_INOTIFY 0
143 # endif
144
145 # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
146 # ifndef EV_USE_SIGNALFD
147 # define EV_USE_SIGNALFD EV_FEATURE_OS
148 # endif
149 # else
150 # undef EV_USE_SIGNALFD
151 # define EV_USE_SIGNALFD 0
152 # endif
153
154 # if HAVE_EVENTFD
155 # ifndef EV_USE_EVENTFD
156 # define EV_USE_EVENTFD EV_FEATURE_OS
157 # endif
158 # else
159 # undef EV_USE_EVENTFD
160 # define EV_USE_EVENTFD 0
161 # endif
162
163 #endif
164
165 #include <math.h>
166 #include <stdlib.h>
167 #include <string.h>
168 #include <fcntl.h>
169 #include <stddef.h>
170
171 #include <stdio.h>
172
173 #include <assert.h>
174 #include <errno.h>
175 #include <sys/types.h>
176 #include <time.h>
177 #include <limits.h>
178
179 #include <signal.h>
180
181 #ifdef EV_H
182 # include EV_H
183 #else
184 # include "ev.h"
185 #endif
186
187 #ifndef _WIN32
188 # include <sys/time.h>
189 # include <sys/wait.h>
190 # include <unistd.h>
191 #else
192 # include <io.h>
193 # define WIN32_LEAN_AND_MEAN
194 # include <windows.h>
195 # ifndef EV_SELECT_IS_WINSOCKET
196 # define EV_SELECT_IS_WINSOCKET 1
197 # endif
198 # undef EV_AVOID_STDIO
199 #endif
200
201 /* OS X, in its infinite idiocy, actually HARDCODES
202 * a limit of 1024 into their select. Where people have brains,
203 * OS X engineers apparently have a vacuum. Or maybe they were
204 * ordered to have a vacuum, or they do anything for money.
205 * This might help. Or not.
206 */
207 #define _DARWIN_UNLIMITED_SELECT 1
208
209 /* this block tries to deduce configuration from header-defined symbols and defaults */
210
211 /* try to deduce the maximum number of signals on this platform */
212 #if defined (EV_NSIG)
213 /* use what's provided */
214 #elif defined (NSIG)
215 # define EV_NSIG (NSIG)
216 #elif defined(_NSIG)
217 # define EV_NSIG (_NSIG)
218 #elif defined (SIGMAX)
219 # define EV_NSIG (SIGMAX+1)
220 #elif defined (SIG_MAX)
221 # define EV_NSIG (SIG_MAX+1)
222 #elif defined (_SIG_MAX)
223 # define EV_NSIG (_SIG_MAX+1)
224 #elif defined (MAXSIG)
225 # define EV_NSIG (MAXSIG+1)
226 #elif defined (MAX_SIG)
227 # define EV_NSIG (MAX_SIG+1)
228 #elif defined (SIGARRAYSIZE)
229 # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
230 #elif defined (_sys_nsig)
231 # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
232 #else
233 # error "unable to find value for NSIG, please report"
234 /* to make it compile regardless, just remove the above line, */
235 /* but consider reporting it, too! :) */
236 # define EV_NSIG 65
237 #endif
238
239 #ifndef EV_USE_CLOCK_SYSCALL
240 # if __linux && __GLIBC__ >= 2
241 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
242 # else
243 # define EV_USE_CLOCK_SYSCALL 0
244 # endif
245 #endif
246
247 #ifndef EV_USE_MONOTONIC
248 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
249 # define EV_USE_MONOTONIC EV_FEATURE_OS
250 # else
251 # define EV_USE_MONOTONIC 0
252 # endif
253 #endif
254
255 #ifndef EV_USE_REALTIME
256 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
257 #endif
258
259 #ifndef EV_USE_NANOSLEEP
260 # if _POSIX_C_SOURCE >= 199309L
261 # define EV_USE_NANOSLEEP EV_FEATURE_OS
262 # else
263 # define EV_USE_NANOSLEEP 0
264 # endif
265 #endif
266
267 #ifndef EV_USE_SELECT
268 # define EV_USE_SELECT EV_FEATURE_BACKENDS
269 #endif
270
271 #ifndef EV_USE_POLL
272 # ifdef _WIN32
273 # define EV_USE_POLL 0
274 # else
275 # define EV_USE_POLL EV_FEATURE_BACKENDS
276 # endif
277 #endif
278
279 #ifndef EV_USE_EPOLL
280 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
281 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
282 # else
283 # define EV_USE_EPOLL 0
284 # endif
285 #endif
286
287 #ifndef EV_USE_KQUEUE
288 # define EV_USE_KQUEUE 0
289 #endif
290
291 #ifndef EV_USE_PORT
292 # define EV_USE_PORT 0
293 #endif
294
295 #ifndef EV_USE_INOTIFY
296 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297 # define EV_USE_INOTIFY EV_FEATURE_OS
298 # else
299 # define EV_USE_INOTIFY 0
300 # endif
301 #endif
302
303 #ifndef EV_PID_HASHSIZE
304 # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
305 #endif
306
307 #ifndef EV_INOTIFY_HASHSIZE
308 # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
309 #endif
310
311 #ifndef EV_USE_EVENTFD
312 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
313 # define EV_USE_EVENTFD EV_FEATURE_OS
314 # else
315 # define EV_USE_EVENTFD 0
316 # endif
317 #endif
318
319 #ifndef EV_USE_SIGNALFD
320 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
321 # define EV_USE_SIGNALFD EV_FEATURE_OS
322 # else
323 # define EV_USE_SIGNALFD 0
324 # endif
325 #endif
326
327 #if 0 /* debugging */
328 # define EV_VERIFY 3
329 # define EV_USE_4HEAP 1
330 # define EV_HEAP_CACHE_AT 1
331 #endif
332
333 #ifndef EV_VERIFY
334 # define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
335 #endif
336
337 #ifndef EV_USE_4HEAP
338 # define EV_USE_4HEAP EV_FEATURE_DATA
339 #endif
340
341 #ifndef EV_HEAP_CACHE_AT
342 # define EV_HEAP_CACHE_AT EV_FEATURE_DATA
343 #endif
344
345 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
346 /* which makes programs even slower. might work on other unices, too. */
347 #if EV_USE_CLOCK_SYSCALL
348 # include <syscall.h>
349 # ifdef SYS_clock_gettime
350 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
351 # undef EV_USE_MONOTONIC
352 # define EV_USE_MONOTONIC 1
353 # else
354 # undef EV_USE_CLOCK_SYSCALL
355 # define EV_USE_CLOCK_SYSCALL 0
356 # endif
357 #endif
358
359 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
360
361 #ifdef _AIX
362 /* AIX has a completely broken poll.h header */
363 # undef EV_USE_POLL
364 # define EV_USE_POLL 0
365 #endif
366
367 #ifndef CLOCK_MONOTONIC
368 # undef EV_USE_MONOTONIC
369 # define EV_USE_MONOTONIC 0
370 #endif
371
372 #ifndef CLOCK_REALTIME
373 # undef EV_USE_REALTIME
374 # define EV_USE_REALTIME 0
375 #endif
376
377 #if !EV_STAT_ENABLE
378 # undef EV_USE_INOTIFY
379 # define EV_USE_INOTIFY 0
380 #endif
381
382 #if !EV_USE_NANOSLEEP
383 # ifndef _WIN32
384 # include <sys/select.h>
385 # endif
386 #endif
387
388 #if EV_USE_INOTIFY
389 # include <sys/utsname.h>
390 # include <sys/statfs.h>
391 # include <sys/inotify.h>
392 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
393 # ifndef IN_DONT_FOLLOW
394 # undef EV_USE_INOTIFY
395 # define EV_USE_INOTIFY 0
396 # endif
397 #endif
398
399 #if EV_SELECT_IS_WINSOCKET
400 # include <winsock.h>
401 #endif
402
403 #if EV_USE_EVENTFD
404 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
405 # include <stdint.h>
406 # ifndef EFD_NONBLOCK
407 # define EFD_NONBLOCK O_NONBLOCK
408 # endif
409 # ifndef EFD_CLOEXEC
410 # ifdef O_CLOEXEC
411 # define EFD_CLOEXEC O_CLOEXEC
412 # else
413 # define EFD_CLOEXEC 02000000
414 # endif
415 # endif
416 # ifdef __cplusplus
417 extern "C" {
418 # endif
419 int (eventfd) (unsigned int initval, int flags);
420 # ifdef __cplusplus
421 }
422 # endif
423 #endif
424
425 #if EV_USE_SIGNALFD
426 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427 # include <stdint.h>
428 # ifndef SFD_NONBLOCK
429 # define SFD_NONBLOCK O_NONBLOCK
430 # endif
431 # ifndef SFD_CLOEXEC
432 # ifdef O_CLOEXEC
433 # define SFD_CLOEXEC O_CLOEXEC
434 # else
435 # define SFD_CLOEXEC 02000000
436 # endif
437 # endif
438 # ifdef __cplusplus
439 extern "C" {
440 # endif
441 int signalfd (int fd, const sigset_t *mask, int flags);
442
443 struct signalfd_siginfo
444 {
445 uint32_t ssi_signo;
446 char pad[128 - sizeof (uint32_t)];
447 };
448 # ifdef __cplusplus
449 }
450 # endif
451 #endif
452
453 /**/
454
455 #if EV_VERIFY >= 3
456 # define EV_FREQUENT_CHECK ev_verify (EV_A)
457 #else
458 # define EV_FREQUENT_CHECK do { } while (0)
459 #endif
460
461 /*
462 * This is used to avoid floating point rounding problems.
463 * It is added to ev_rt_now when scheduling periodics
464 * to ensure progress, time-wise, even when rounding
465 * errors are against us.
466 * This value is good at least till the year 4000.
467 * Better solutions welcome.
468 */
469 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
470
471 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
472 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
473
474 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
475 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
476
477 #if __GNUC__ >= 4
478 # define expect(expr,value) __builtin_expect ((expr),(value))
479 # define noinline __attribute__ ((noinline))
480 #else
481 # define expect(expr,value) (expr)
482 # define noinline
483 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
484 # define inline
485 # endif
486 #endif
487
488 #define expect_false(expr) expect ((expr) != 0, 0)
489 #define expect_true(expr) expect ((expr) != 0, 1)
490 #define inline_size static inline
491
492 #if EV_FEATURE_CODE
493 # define inline_speed static inline
494 #else
495 # define inline_speed static noinline
496 #endif
497
498 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
499
500 #if EV_MINPRI == EV_MAXPRI
501 # define ABSPRI(w) (((W)w), 0)
502 #else
503 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
504 #endif
505
506 #define EMPTY /* required for microsofts broken pseudo-c compiler */
507 #define EMPTY2(a,b) /* used to suppress some warnings */
508
509 typedef ev_watcher *W;
510 typedef ev_watcher_list *WL;
511 typedef ev_watcher_time *WT;
512
513 #define ev_active(w) ((W)(w))->active
514 #define ev_at(w) ((WT)(w))->at
515
516 #if EV_USE_REALTIME
517 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
518 /* giving it a reasonably high chance of working on typical architectures */
519 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
520 #endif
521
522 #if EV_USE_MONOTONIC
523 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
524 #endif
525
526 #ifndef EV_FD_TO_WIN32_HANDLE
527 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
528 #endif
529 #ifndef EV_WIN32_HANDLE_TO_FD
530 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
531 #endif
532 #ifndef EV_WIN32_CLOSE_FD
533 # define EV_WIN32_CLOSE_FD(fd) close (fd)
534 #endif
535
536 #ifdef _WIN32
537 # include "ev_win32.c"
538 #endif
539
540 /*****************************************************************************/
541
542 #if EV_AVOID_STDIO
543 static void noinline
544 ev_printerr (const char *msg)
545 {
546 write (STDERR_FILENO, msg, strlen (msg));
547 }
548 #endif
549
550 static void (*syserr_cb)(const char *msg);
551
552 void
553 ev_set_syserr_cb (void (*cb)(const char *msg))
554 {
555 syserr_cb = cb;
556 }
557
558 static void noinline
559 ev_syserr (const char *msg)
560 {
561 if (!msg)
562 msg = "(libev) system error";
563
564 if (syserr_cb)
565 syserr_cb (msg);
566 else
567 {
568 #if EV_AVOID_STDIO
569 const char *err = strerror (errno);
570
571 ev_printerr (msg);
572 ev_printerr (": ");
573 ev_printerr (err);
574 ev_printerr ("\n");
575 #else
576 perror (msg);
577 #endif
578 abort ();
579 }
580 }
581
582 static void *
583 ev_realloc_emul (void *ptr, long size)
584 {
585 #if __GLIBC__
586 return realloc (ptr, size);
587 #else
588 /* some systems, notably openbsd and darwin, fail to properly
589 * implement realloc (x, 0) (as required by both ansi c-89 and
590 * the single unix specification, so work around them here.
591 */
592
593 if (size)
594 return realloc (ptr, size);
595
596 free (ptr);
597 return 0;
598 #endif
599 }
600
601 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
602
603 void
604 ev_set_allocator (void *(*cb)(void *ptr, long size))
605 {
606 alloc = cb;
607 }
608
609 inline_speed void *
610 ev_realloc (void *ptr, long size)
611 {
612 ptr = alloc (ptr, size);
613
614 if (!ptr && size)
615 {
616 #if EV_AVOID_STDIO
617 ev_printerr ("libev: memory allocation failed, aborting.\n");
618 #else
619 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
620 #endif
621 abort ();
622 }
623
624 return ptr;
625 }
626
627 #define ev_malloc(size) ev_realloc (0, (size))
628 #define ev_free(ptr) ev_realloc ((ptr), 0)
629
630 /*****************************************************************************/
631
632 /* set in reify when reification needed */
633 #define EV_ANFD_REIFY 1
634
635 /* file descriptor info structure */
636 typedef struct
637 {
638 WL head;
639 unsigned char events; /* the events watched for */
640 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
641 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
642 unsigned char unused;
643 #if EV_USE_EPOLL
644 unsigned int egen; /* generation counter to counter epoll bugs */
645 #endif
646 #if EV_SELECT_IS_WINSOCKET
647 SOCKET handle;
648 #endif
649 } ANFD;
650
651 /* stores the pending event set for a given watcher */
652 typedef struct
653 {
654 W w;
655 int events; /* the pending event set for the given watcher */
656 } ANPENDING;
657
658 #if EV_USE_INOTIFY
659 /* hash table entry per inotify-id */
660 typedef struct
661 {
662 WL head;
663 } ANFS;
664 #endif
665
666 /* Heap Entry */
667 #if EV_HEAP_CACHE_AT
668 /* a heap element */
669 typedef struct {
670 ev_tstamp at;
671 WT w;
672 } ANHE;
673
674 #define ANHE_w(he) (he).w /* access watcher, read-write */
675 #define ANHE_at(he) (he).at /* access cached at, read-only */
676 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
677 #else
678 /* a heap element */
679 typedef WT ANHE;
680
681 #define ANHE_w(he) (he)
682 #define ANHE_at(he) (he)->at
683 #define ANHE_at_cache(he)
684 #endif
685
686 #if EV_MULTIPLICITY
687
688 struct ev_loop
689 {
690 ev_tstamp ev_rt_now;
691 #define ev_rt_now ((loop)->ev_rt_now)
692 #define VAR(name,decl) decl;
693 #include "ev_vars.h"
694 #undef VAR
695 };
696 #include "ev_wrap.h"
697
698 static struct ev_loop default_loop_struct;
699 struct ev_loop *ev_default_loop_ptr;
700
701 #else
702
703 ev_tstamp ev_rt_now;
704 #define VAR(name,decl) static decl;
705 #include "ev_vars.h"
706 #undef VAR
707
708 static int ev_default_loop_ptr;
709
710 #endif
711
712 #if EV_FEATURE_API
713 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
714 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
715 # define EV_INVOKE_PENDING invoke_cb (EV_A)
716 #else
717 # define EV_RELEASE_CB (void)0
718 # define EV_ACQUIRE_CB (void)0
719 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720 #endif
721
722 #define EVUNLOOP_RECURSE 0x80
723
724 /*****************************************************************************/
725
726 #ifndef EV_HAVE_EV_TIME
727 ev_tstamp
728 ev_time (void)
729 {
730 #if EV_USE_REALTIME
731 if (expect_true (have_realtime))
732 {
733 struct timespec ts;
734 clock_gettime (CLOCK_REALTIME, &ts);
735 return ts.tv_sec + ts.tv_nsec * 1e-9;
736 }
737 #endif
738
739 struct timeval tv;
740 gettimeofday (&tv, 0);
741 return tv.tv_sec + tv.tv_usec * 1e-6;
742 }
743 #endif
744
745 inline_size ev_tstamp
746 get_clock (void)
747 {
748 #if EV_USE_MONOTONIC
749 if (expect_true (have_monotonic))
750 {
751 struct timespec ts;
752 clock_gettime (CLOCK_MONOTONIC, &ts);
753 return ts.tv_sec + ts.tv_nsec * 1e-9;
754 }
755 #endif
756
757 return ev_time ();
758 }
759
760 #if EV_MULTIPLICITY
761 ev_tstamp
762 ev_now (EV_P)
763 {
764 return ev_rt_now;
765 }
766 #endif
767
768 void
769 ev_sleep (ev_tstamp delay)
770 {
771 if (delay > 0.)
772 {
773 #if EV_USE_NANOSLEEP
774 struct timespec ts;
775
776 EV_TS_SET (ts, delay);
777 nanosleep (&ts, 0);
778 #elif defined(_WIN32)
779 Sleep ((unsigned long)(delay * 1e3));
780 #else
781 struct timeval tv;
782
783 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
784 /* something not guaranteed by newer posix versions, but guaranteed */
785 /* by older ones */
786 EV_TV_SET (tv, delay);
787 select (0, 0, 0, 0, &tv);
788 #endif
789 }
790 }
791
792 /*****************************************************************************/
793
794 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
795
796 /* find a suitable new size for the given array, */
797 /* hopefully by rounding to a nice-to-malloc size */
798 inline_size int
799 array_nextsize (int elem, int cur, int cnt)
800 {
801 int ncur = cur + 1;
802
803 do
804 ncur <<= 1;
805 while (cnt > ncur);
806
807 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
808 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
809 {
810 ncur *= elem;
811 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
812 ncur = ncur - sizeof (void *) * 4;
813 ncur /= elem;
814 }
815
816 return ncur;
817 }
818
819 static noinline void *
820 array_realloc (int elem, void *base, int *cur, int cnt)
821 {
822 *cur = array_nextsize (elem, *cur, cnt);
823 return ev_realloc (base, elem * *cur);
824 }
825
826 #define array_init_zero(base,count) \
827 memset ((void *)(base), 0, sizeof (*(base)) * (count))
828
829 #define array_needsize(type,base,cur,cnt,init) \
830 if (expect_false ((cnt) > (cur))) \
831 { \
832 int ocur_ = (cur); \
833 (base) = (type *)array_realloc \
834 (sizeof (type), (base), &(cur), (cnt)); \
835 init ((base) + (ocur_), (cur) - ocur_); \
836 }
837
838 #if 0
839 #define array_slim(type,stem) \
840 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
841 { \
842 stem ## max = array_roundsize (stem ## cnt >> 1); \
843 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
844 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
845 }
846 #endif
847
848 #define array_free(stem, idx) \
849 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
850
851 /*****************************************************************************/
852
853 /* dummy callback for pending events */
854 static void noinline
855 pendingcb (EV_P_ ev_prepare *w, int revents)
856 {
857 }
858
859 void noinline
860 ev_feed_event (EV_P_ void *w, int revents)
861 {
862 W w_ = (W)w;
863 int pri = ABSPRI (w_);
864
865 if (expect_false (w_->pending))
866 pendings [pri][w_->pending - 1].events |= revents;
867 else
868 {
869 w_->pending = ++pendingcnt [pri];
870 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
871 pendings [pri][w_->pending - 1].w = w_;
872 pendings [pri][w_->pending - 1].events = revents;
873 }
874 }
875
876 inline_speed void
877 feed_reverse (EV_P_ W w)
878 {
879 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
880 rfeeds [rfeedcnt++] = w;
881 }
882
883 inline_size void
884 feed_reverse_done (EV_P_ int revents)
885 {
886 do
887 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
888 while (rfeedcnt);
889 }
890
891 inline_speed void
892 queue_events (EV_P_ W *events, int eventcnt, int type)
893 {
894 int i;
895
896 for (i = 0; i < eventcnt; ++i)
897 ev_feed_event (EV_A_ events [i], type);
898 }
899
900 /*****************************************************************************/
901
902 inline_speed void
903 fd_event_nocheck (EV_P_ int fd, int revents)
904 {
905 ANFD *anfd = anfds + fd;
906 ev_io *w;
907
908 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
909 {
910 int ev = w->events & revents;
911
912 if (ev)
913 ev_feed_event (EV_A_ (W)w, ev);
914 }
915 }
916
917 /* do not submit kernel events for fds that have reify set */
918 /* because that means they changed while we were polling for new events */
919 inline_speed void
920 fd_event (EV_P_ int fd, int revents)
921 {
922 ANFD *anfd = anfds + fd;
923
924 if (expect_true (!anfd->reify))
925 fd_event_nocheck (EV_A_ fd, revents);
926 }
927
928 void
929 ev_feed_fd_event (EV_P_ int fd, int revents)
930 {
931 if (fd >= 0 && fd < anfdmax)
932 fd_event_nocheck (EV_A_ fd, revents);
933 }
934
935 /* make sure the external fd watch events are in-sync */
936 /* with the kernel/libev internal state */
937 inline_size void
938 fd_reify (EV_P)
939 {
940 int i;
941
942 for (i = 0; i < fdchangecnt; ++i)
943 {
944 int fd = fdchanges [i];
945 ANFD *anfd = anfds + fd;
946 ev_io *w;
947
948 unsigned char events = 0;
949
950 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
951 events |= (unsigned char)w->events;
952
953 #if EV_SELECT_IS_WINSOCKET
954 if (events)
955 {
956 unsigned long arg;
957 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
958 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
959 }
960 #endif
961
962 {
963 unsigned char o_events = anfd->events;
964 unsigned char o_reify = anfd->reify;
965
966 anfd->reify = 0;
967 anfd->events = events;
968
969 if (o_events != events || o_reify & EV__IOFDSET)
970 backend_modify (EV_A_ fd, o_events, events);
971 }
972 }
973
974 fdchangecnt = 0;
975 }
976
977 /* something about the given fd changed */
978 inline_size void
979 fd_change (EV_P_ int fd, int flags)
980 {
981 unsigned char reify = anfds [fd].reify;
982 anfds [fd].reify |= flags;
983
984 if (expect_true (!reify))
985 {
986 ++fdchangecnt;
987 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
988 fdchanges [fdchangecnt - 1] = fd;
989 }
990 }
991
992 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
993 inline_speed void
994 fd_kill (EV_P_ int fd)
995 {
996 ev_io *w;
997
998 while ((w = (ev_io *)anfds [fd].head))
999 {
1000 ev_io_stop (EV_A_ w);
1001 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1002 }
1003 }
1004
1005 /* check whether the given fd is actually valid, for error recovery */
1006 inline_size int
1007 fd_valid (int fd)
1008 {
1009 #ifdef _WIN32
1010 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1011 #else
1012 return fcntl (fd, F_GETFD) != -1;
1013 #endif
1014 }
1015
1016 /* called on EBADF to verify fds */
1017 static void noinline
1018 fd_ebadf (EV_P)
1019 {
1020 int fd;
1021
1022 for (fd = 0; fd < anfdmax; ++fd)
1023 if (anfds [fd].events)
1024 if (!fd_valid (fd) && errno == EBADF)
1025 fd_kill (EV_A_ fd);
1026 }
1027
1028 /* called on ENOMEM in select/poll to kill some fds and retry */
1029 static void noinline
1030 fd_enomem (EV_P)
1031 {
1032 int fd;
1033
1034 for (fd = anfdmax; fd--; )
1035 if (anfds [fd].events)
1036 {
1037 fd_kill (EV_A_ fd);
1038 break;
1039 }
1040 }
1041
1042 /* usually called after fork if backend needs to re-arm all fds from scratch */
1043 static void noinline
1044 fd_rearm_all (EV_P)
1045 {
1046 int fd;
1047
1048 for (fd = 0; fd < anfdmax; ++fd)
1049 if (anfds [fd].events)
1050 {
1051 anfds [fd].events = 0;
1052 anfds [fd].emask = 0;
1053 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1054 }
1055 }
1056
1057 /* used to prepare libev internal fd's */
1058 /* this is not fork-safe */
1059 inline_speed void
1060 fd_intern (int fd)
1061 {
1062 #ifdef _WIN32
1063 unsigned long arg = 1;
1064 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1065 #else
1066 fcntl (fd, F_SETFD, FD_CLOEXEC);
1067 fcntl (fd, F_SETFL, O_NONBLOCK);
1068 #endif
1069 }
1070
1071 /*****************************************************************************/
1072
1073 /*
1074 * the heap functions want a real array index. array index 0 is guaranteed to not
1075 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1076 * the branching factor of the d-tree.
1077 */
1078
1079 /*
1080 * at the moment we allow libev the luxury of two heaps,
1081 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1082 * which is more cache-efficient.
1083 * the difference is about 5% with 50000+ watchers.
1084 */
1085 #if EV_USE_4HEAP
1086
1087 #define DHEAP 4
1088 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1089 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1090 #define UPHEAP_DONE(p,k) ((p) == (k))
1091
1092 /* away from the root */
1093 inline_speed void
1094 downheap (ANHE *heap, int N, int k)
1095 {
1096 ANHE he = heap [k];
1097 ANHE *E = heap + N + HEAP0;
1098
1099 for (;;)
1100 {
1101 ev_tstamp minat;
1102 ANHE *minpos;
1103 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1104
1105 /* find minimum child */
1106 if (expect_true (pos + DHEAP - 1 < E))
1107 {
1108 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1109 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1110 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1111 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1112 }
1113 else if (pos < E)
1114 {
1115 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1116 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1117 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1118 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1119 }
1120 else
1121 break;
1122
1123 if (ANHE_at (he) <= minat)
1124 break;
1125
1126 heap [k] = *minpos;
1127 ev_active (ANHE_w (*minpos)) = k;
1128
1129 k = minpos - heap;
1130 }
1131
1132 heap [k] = he;
1133 ev_active (ANHE_w (he)) = k;
1134 }
1135
1136 #else /* 4HEAP */
1137
1138 #define HEAP0 1
1139 #define HPARENT(k) ((k) >> 1)
1140 #define UPHEAP_DONE(p,k) (!(p))
1141
1142 /* away from the root */
1143 inline_speed void
1144 downheap (ANHE *heap, int N, int k)
1145 {
1146 ANHE he = heap [k];
1147
1148 for (;;)
1149 {
1150 int c = k << 1;
1151
1152 if (c >= N + HEAP0)
1153 break;
1154
1155 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1156 ? 1 : 0;
1157
1158 if (ANHE_at (he) <= ANHE_at (heap [c]))
1159 break;
1160
1161 heap [k] = heap [c];
1162 ev_active (ANHE_w (heap [k])) = k;
1163
1164 k = c;
1165 }
1166
1167 heap [k] = he;
1168 ev_active (ANHE_w (he)) = k;
1169 }
1170 #endif
1171
1172 /* towards the root */
1173 inline_speed void
1174 upheap (ANHE *heap, int k)
1175 {
1176 ANHE he = heap [k];
1177
1178 for (;;)
1179 {
1180 int p = HPARENT (k);
1181
1182 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1183 break;
1184
1185 heap [k] = heap [p];
1186 ev_active (ANHE_w (heap [k])) = k;
1187 k = p;
1188 }
1189
1190 heap [k] = he;
1191 ev_active (ANHE_w (he)) = k;
1192 }
1193
1194 /* move an element suitably so it is in a correct place */
1195 inline_size void
1196 adjustheap (ANHE *heap, int N, int k)
1197 {
1198 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1199 upheap (heap, k);
1200 else
1201 downheap (heap, N, k);
1202 }
1203
1204 /* rebuild the heap: this function is used only once and executed rarely */
1205 inline_size void
1206 reheap (ANHE *heap, int N)
1207 {
1208 int i;
1209
1210 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1211 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1212 for (i = 0; i < N; ++i)
1213 upheap (heap, i + HEAP0);
1214 }
1215
1216 /*****************************************************************************/
1217
1218 /* associate signal watchers to a signal signal */
1219 typedef struct
1220 {
1221 EV_ATOMIC_T pending;
1222 #if EV_MULTIPLICITY
1223 EV_P;
1224 #endif
1225 WL head;
1226 } ANSIG;
1227
1228 static ANSIG signals [EV_NSIG - 1];
1229
1230 /*****************************************************************************/
1231
1232 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1233
1234 static void noinline
1235 evpipe_init (EV_P)
1236 {
1237 if (!ev_is_active (&pipe_w))
1238 {
1239 # if EV_USE_EVENTFD
1240 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1241 if (evfd < 0 && errno == EINVAL)
1242 evfd = eventfd (0, 0);
1243
1244 if (evfd >= 0)
1245 {
1246 evpipe [0] = -1;
1247 fd_intern (evfd); /* doing it twice doesn't hurt */
1248 ev_io_set (&pipe_w, evfd, EV_READ);
1249 }
1250 else
1251 # endif
1252 {
1253 while (pipe (evpipe))
1254 ev_syserr ("(libev) error creating signal/async pipe");
1255
1256 fd_intern (evpipe [0]);
1257 fd_intern (evpipe [1]);
1258 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1259 }
1260
1261 ev_io_start (EV_A_ &pipe_w);
1262 ev_unref (EV_A); /* watcher should not keep loop alive */
1263 }
1264 }
1265
1266 inline_size void
1267 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1268 {
1269 if (!*flag)
1270 {
1271 int old_errno = errno; /* save errno because write might clobber it */
1272 char dummy;
1273
1274 *flag = 1;
1275
1276 #if EV_USE_EVENTFD
1277 if (evfd >= 0)
1278 {
1279 uint64_t counter = 1;
1280 write (evfd, &counter, sizeof (uint64_t));
1281 }
1282 else
1283 #endif
1284 /* win32 people keep sending patches that change this write() to send() */
1285 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1286 /* so when you think this write should be a send instead, please find out */
1287 /* where your send() is from - it's definitely not the microsoft send, and */
1288 /* tell me. thank you. */
1289 write (evpipe [1], &dummy, 1);
1290
1291 errno = old_errno;
1292 }
1293 }
1294
1295 /* called whenever the libev signal pipe */
1296 /* got some events (signal, async) */
1297 static void
1298 pipecb (EV_P_ ev_io *iow, int revents)
1299 {
1300 int i;
1301
1302 #if EV_USE_EVENTFD
1303 if (evfd >= 0)
1304 {
1305 uint64_t counter;
1306 read (evfd, &counter, sizeof (uint64_t));
1307 }
1308 else
1309 #endif
1310 {
1311 char dummy;
1312 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1313 read (evpipe [0], &dummy, 1);
1314 }
1315
1316 if (sig_pending)
1317 {
1318 sig_pending = 0;
1319
1320 for (i = EV_NSIG - 1; i--; )
1321 if (expect_false (signals [i].pending))
1322 ev_feed_signal_event (EV_A_ i + 1);
1323 }
1324
1325 #if EV_ASYNC_ENABLE
1326 if (async_pending)
1327 {
1328 async_pending = 0;
1329
1330 for (i = asynccnt; i--; )
1331 if (asyncs [i]->sent)
1332 {
1333 asyncs [i]->sent = 0;
1334 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1335 }
1336 }
1337 #endif
1338 }
1339
1340 /*****************************************************************************/
1341
1342 static void
1343 ev_sighandler (int signum)
1344 {
1345 #if EV_MULTIPLICITY
1346 EV_P = signals [signum - 1].loop;
1347 #endif
1348
1349 #ifdef _WIN32
1350 signal (signum, ev_sighandler);
1351 #endif
1352
1353 signals [signum - 1].pending = 1;
1354 evpipe_write (EV_A_ &sig_pending);
1355 }
1356
1357 void noinline
1358 ev_feed_signal_event (EV_P_ int signum)
1359 {
1360 WL w;
1361
1362 if (expect_false (signum <= 0 || signum > EV_NSIG))
1363 return;
1364
1365 --signum;
1366
1367 #if EV_MULTIPLICITY
1368 /* it is permissible to try to feed a signal to the wrong loop */
1369 /* or, likely more useful, feeding a signal nobody is waiting for */
1370
1371 if (expect_false (signals [signum].loop != EV_A))
1372 return;
1373 #endif
1374
1375 signals [signum].pending = 0;
1376
1377 for (w = signals [signum].head; w; w = w->next)
1378 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1379 }
1380
1381 #if EV_USE_SIGNALFD
1382 static void
1383 sigfdcb (EV_P_ ev_io *iow, int revents)
1384 {
1385 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1386
1387 for (;;)
1388 {
1389 ssize_t res = read (sigfd, si, sizeof (si));
1390
1391 /* not ISO-C, as res might be -1, but works with SuS */
1392 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1393 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1394
1395 if (res < (ssize_t)sizeof (si))
1396 break;
1397 }
1398 }
1399 #endif
1400
1401 #endif
1402
1403 /*****************************************************************************/
1404
1405 #if EV_CHILD_ENABLE
1406 static WL childs [EV_PID_HASHSIZE];
1407
1408 static ev_signal childev;
1409
1410 #ifndef WIFCONTINUED
1411 # define WIFCONTINUED(status) 0
1412 #endif
1413
1414 /* handle a single child status event */
1415 inline_speed void
1416 child_reap (EV_P_ int chain, int pid, int status)
1417 {
1418 ev_child *w;
1419 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1420
1421 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1422 {
1423 if ((w->pid == pid || !w->pid)
1424 && (!traced || (w->flags & 1)))
1425 {
1426 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1427 w->rpid = pid;
1428 w->rstatus = status;
1429 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1430 }
1431 }
1432 }
1433
1434 #ifndef WCONTINUED
1435 # define WCONTINUED 0
1436 #endif
1437
1438 /* called on sigchld etc., calls waitpid */
1439 static void
1440 childcb (EV_P_ ev_signal *sw, int revents)
1441 {
1442 int pid, status;
1443
1444 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1445 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1446 if (!WCONTINUED
1447 || errno != EINVAL
1448 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1449 return;
1450
1451 /* make sure we are called again until all children have been reaped */
1452 /* we need to do it this way so that the callback gets called before we continue */
1453 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1454
1455 child_reap (EV_A_ pid, pid, status);
1456 if ((EV_PID_HASHSIZE) > 1)
1457 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1458 }
1459
1460 #endif
1461
1462 /*****************************************************************************/
1463
1464 #if EV_USE_PORT
1465 # include "ev_port.c"
1466 #endif
1467 #if EV_USE_KQUEUE
1468 # include "ev_kqueue.c"
1469 #endif
1470 #if EV_USE_EPOLL
1471 # include "ev_epoll.c"
1472 #endif
1473 #if EV_USE_POLL
1474 # include "ev_poll.c"
1475 #endif
1476 #if EV_USE_SELECT
1477 # include "ev_select.c"
1478 #endif
1479
1480 int
1481 ev_version_major (void)
1482 {
1483 return EV_VERSION_MAJOR;
1484 }
1485
1486 int
1487 ev_version_minor (void)
1488 {
1489 return EV_VERSION_MINOR;
1490 }
1491
1492 /* return true if we are running with elevated privileges and should ignore env variables */
1493 int inline_size
1494 enable_secure (void)
1495 {
1496 #ifdef _WIN32
1497 return 0;
1498 #else
1499 return getuid () != geteuid ()
1500 || getgid () != getegid ();
1501 #endif
1502 }
1503
1504 unsigned int
1505 ev_supported_backends (void)
1506 {
1507 unsigned int flags = 0;
1508
1509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1510 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1511 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1512 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1514
1515 return flags;
1516 }
1517
1518 unsigned int
1519 ev_recommended_backends (void)
1520 {
1521 unsigned int flags = ev_supported_backends ();
1522
1523 #ifndef __NetBSD__
1524 /* kqueue is borked on everything but netbsd apparently */
1525 /* it usually doesn't work correctly on anything but sockets and pipes */
1526 flags &= ~EVBACKEND_KQUEUE;
1527 #endif
1528 #ifdef __APPLE__
1529 /* only select works correctly on that "unix-certified" platform */
1530 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1531 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1532 #endif
1533 #ifdef __FreeBSD__
1534 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1535 #endif
1536
1537 return flags;
1538 }
1539
1540 unsigned int
1541 ev_embeddable_backends (void)
1542 {
1543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1544
1545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1546 /* please fix it and tell me how to detect the fix */
1547 flags &= ~EVBACKEND_EPOLL;
1548
1549 return flags;
1550 }
1551
1552 unsigned int
1553 ev_backend (EV_P)
1554 {
1555 return backend;
1556 }
1557
1558 #if EV_FEATURE_API
1559 unsigned int
1560 ev_iteration (EV_P)
1561 {
1562 return loop_count;
1563 }
1564
1565 unsigned int
1566 ev_depth (EV_P)
1567 {
1568 return loop_depth;
1569 }
1570
1571 void
1572 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1573 {
1574 io_blocktime = interval;
1575 }
1576
1577 void
1578 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1579 {
1580 timeout_blocktime = interval;
1581 }
1582
1583 void
1584 ev_set_userdata (EV_P_ void *data)
1585 {
1586 userdata = data;
1587 }
1588
1589 void *
1590 ev_userdata (EV_P)
1591 {
1592 return userdata;
1593 }
1594
1595 void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1596 {
1597 invoke_cb = invoke_pending_cb;
1598 }
1599
1600 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1601 {
1602 release_cb = release;
1603 acquire_cb = acquire;
1604 }
1605 #endif
1606
1607 /* initialise a loop structure, must be zero-initialised */
1608 static void noinline
1609 loop_init (EV_P_ unsigned int flags)
1610 {
1611 if (!backend)
1612 {
1613 #if EV_USE_REALTIME
1614 if (!have_realtime)
1615 {
1616 struct timespec ts;
1617
1618 if (!clock_gettime (CLOCK_REALTIME, &ts))
1619 have_realtime = 1;
1620 }
1621 #endif
1622
1623 #if EV_USE_MONOTONIC
1624 if (!have_monotonic)
1625 {
1626 struct timespec ts;
1627
1628 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1629 have_monotonic = 1;
1630 }
1631 #endif
1632
1633 /* pid check not overridable via env */
1634 #ifndef _WIN32
1635 if (flags & EVFLAG_FORKCHECK)
1636 curpid = getpid ();
1637 #endif
1638
1639 if (!(flags & EVFLAG_NOENV)
1640 && !enable_secure ()
1641 && getenv ("LIBEV_FLAGS"))
1642 flags = atoi (getenv ("LIBEV_FLAGS"));
1643
1644 ev_rt_now = ev_time ();
1645 mn_now = get_clock ();
1646 now_floor = mn_now;
1647 rtmn_diff = ev_rt_now - mn_now;
1648 #if EV_FEATURE_API
1649 invoke_cb = ev_invoke_pending;
1650 #endif
1651
1652 io_blocktime = 0.;
1653 timeout_blocktime = 0.;
1654 backend = 0;
1655 backend_fd = -1;
1656 sig_pending = 0;
1657 #if EV_ASYNC_ENABLE
1658 async_pending = 0;
1659 #endif
1660 #if EV_USE_INOTIFY
1661 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1662 #endif
1663 #if EV_USE_SIGNALFD
1664 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1665 #endif
1666
1667 if (!(flags & 0x0000ffffU))
1668 flags |= ev_recommended_backends ();
1669
1670 #if EV_USE_PORT
1671 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1672 #endif
1673 #if EV_USE_KQUEUE
1674 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1675 #endif
1676 #if EV_USE_EPOLL
1677 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1678 #endif
1679 #if EV_USE_POLL
1680 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1681 #endif
1682 #if EV_USE_SELECT
1683 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1684 #endif
1685
1686 ev_prepare_init (&pending_w, pendingcb);
1687
1688 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1689 ev_init (&pipe_w, pipecb);
1690 ev_set_priority (&pipe_w, EV_MAXPRI);
1691 #endif
1692 }
1693 }
1694
1695 /* free up a loop structure */
1696 static void noinline
1697 loop_destroy (EV_P)
1698 {
1699 int i;
1700
1701 if (ev_is_active (&pipe_w))
1702 {
1703 /*ev_ref (EV_A);*/
1704 /*ev_io_stop (EV_A_ &pipe_w);*/
1705
1706 #if EV_USE_EVENTFD
1707 if (evfd >= 0)
1708 close (evfd);
1709 #endif
1710
1711 if (evpipe [0] >= 0)
1712 {
1713 EV_WIN32_CLOSE_FD (evpipe [0]);
1714 EV_WIN32_CLOSE_FD (evpipe [1]);
1715 }
1716 }
1717
1718 #if EV_USE_SIGNALFD
1719 if (ev_is_active (&sigfd_w))
1720 close (sigfd);
1721 #endif
1722
1723 #if EV_USE_INOTIFY
1724 if (fs_fd >= 0)
1725 close (fs_fd);
1726 #endif
1727
1728 if (backend_fd >= 0)
1729 close (backend_fd);
1730
1731 #if EV_USE_PORT
1732 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1733 #endif
1734 #if EV_USE_KQUEUE
1735 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1736 #endif
1737 #if EV_USE_EPOLL
1738 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1739 #endif
1740 #if EV_USE_POLL
1741 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1742 #endif
1743 #if EV_USE_SELECT
1744 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1745 #endif
1746
1747 for (i = NUMPRI; i--; )
1748 {
1749 array_free (pending, [i]);
1750 #if EV_IDLE_ENABLE
1751 array_free (idle, [i]);
1752 #endif
1753 }
1754
1755 ev_free (anfds); anfds = 0; anfdmax = 0;
1756
1757 /* have to use the microsoft-never-gets-it-right macro */
1758 array_free (rfeed, EMPTY);
1759 array_free (fdchange, EMPTY);
1760 array_free (timer, EMPTY);
1761 #if EV_PERIODIC_ENABLE
1762 array_free (periodic, EMPTY);
1763 #endif
1764 #if EV_FORK_ENABLE
1765 array_free (fork, EMPTY);
1766 #endif
1767 array_free (prepare, EMPTY);
1768 array_free (check, EMPTY);
1769 #if EV_ASYNC_ENABLE
1770 array_free (async, EMPTY);
1771 #endif
1772
1773 backend = 0;
1774 }
1775
1776 #if EV_USE_INOTIFY
1777 inline_size void infy_fork (EV_P);
1778 #endif
1779
1780 inline_size void
1781 loop_fork (EV_P)
1782 {
1783 #if EV_USE_PORT
1784 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1785 #endif
1786 #if EV_USE_KQUEUE
1787 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1788 #endif
1789 #if EV_USE_EPOLL
1790 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1791 #endif
1792 #if EV_USE_INOTIFY
1793 infy_fork (EV_A);
1794 #endif
1795
1796 if (ev_is_active (&pipe_w))
1797 {
1798 /* this "locks" the handlers against writing to the pipe */
1799 /* while we modify the fd vars */
1800 sig_pending = 1;
1801 #if EV_ASYNC_ENABLE
1802 async_pending = 1;
1803 #endif
1804
1805 ev_ref (EV_A);
1806 ev_io_stop (EV_A_ &pipe_w);
1807
1808 #if EV_USE_EVENTFD
1809 if (evfd >= 0)
1810 close (evfd);
1811 #endif
1812
1813 if (evpipe [0] >= 0)
1814 {
1815 EV_WIN32_CLOSE_FD (evpipe [0]);
1816 EV_WIN32_CLOSE_FD (evpipe [1]);
1817 }
1818
1819 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1820 evpipe_init (EV_A);
1821 /* now iterate over everything, in case we missed something */
1822 pipecb (EV_A_ &pipe_w, EV_READ);
1823 #endif
1824 }
1825
1826 postfork = 0;
1827 }
1828
1829 #if EV_MULTIPLICITY
1830
1831 struct ev_loop *
1832 ev_loop_new (unsigned int flags)
1833 {
1834 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1835
1836 memset (EV_A, 0, sizeof (struct ev_loop));
1837 loop_init (EV_A_ flags);
1838
1839 if (ev_backend (EV_A))
1840 return EV_A;
1841
1842 return 0;
1843 }
1844
1845 void
1846 ev_loop_destroy (EV_P)
1847 {
1848 loop_destroy (EV_A);
1849 ev_free (loop);
1850 }
1851
1852 void
1853 ev_loop_fork (EV_P)
1854 {
1855 postfork = 1; /* must be in line with ev_default_fork */
1856 }
1857 #endif /* multiplicity */
1858
1859 #if EV_VERIFY
1860 static void noinline
1861 verify_watcher (EV_P_ W w)
1862 {
1863 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1864
1865 if (w->pending)
1866 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1867 }
1868
1869 static void noinline
1870 verify_heap (EV_P_ ANHE *heap, int N)
1871 {
1872 int i;
1873
1874 for (i = HEAP0; i < N + HEAP0; ++i)
1875 {
1876 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1877 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1878 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1879
1880 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1881 }
1882 }
1883
1884 static void noinline
1885 array_verify (EV_P_ W *ws, int cnt)
1886 {
1887 while (cnt--)
1888 {
1889 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1890 verify_watcher (EV_A_ ws [cnt]);
1891 }
1892 }
1893 #endif
1894
1895 #if EV_FEATURE_API
1896 void
1897 ev_verify (EV_P)
1898 {
1899 #if EV_VERIFY
1900 int i;
1901 WL w;
1902
1903 assert (activecnt >= -1);
1904
1905 assert (fdchangemax >= fdchangecnt);
1906 for (i = 0; i < fdchangecnt; ++i)
1907 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1908
1909 assert (anfdmax >= 0);
1910 for (i = 0; i < anfdmax; ++i)
1911 for (w = anfds [i].head; w; w = w->next)
1912 {
1913 verify_watcher (EV_A_ (W)w);
1914 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1915 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1916 }
1917
1918 assert (timermax >= timercnt);
1919 verify_heap (EV_A_ timers, timercnt);
1920
1921 #if EV_PERIODIC_ENABLE
1922 assert (periodicmax >= periodiccnt);
1923 verify_heap (EV_A_ periodics, periodiccnt);
1924 #endif
1925
1926 for (i = NUMPRI; i--; )
1927 {
1928 assert (pendingmax [i] >= pendingcnt [i]);
1929 #if EV_IDLE_ENABLE
1930 assert (idleall >= 0);
1931 assert (idlemax [i] >= idlecnt [i]);
1932 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1933 #endif
1934 }
1935
1936 #if EV_FORK_ENABLE
1937 assert (forkmax >= forkcnt);
1938 array_verify (EV_A_ (W *)forks, forkcnt);
1939 #endif
1940
1941 #if EV_ASYNC_ENABLE
1942 assert (asyncmax >= asynccnt);
1943 array_verify (EV_A_ (W *)asyncs, asynccnt);
1944 #endif
1945
1946 #if EV_PREPARE_ENABLE
1947 assert (preparemax >= preparecnt);
1948 array_verify (EV_A_ (W *)prepares, preparecnt);
1949 #endif
1950
1951 #if EV_CHECK_ENABLE
1952 assert (checkmax >= checkcnt);
1953 array_verify (EV_A_ (W *)checks, checkcnt);
1954 #endif
1955
1956 # if 0
1957 #if EV_CHILD_ENABLE
1958 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1959 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1960 #endif
1961 # endif
1962 #endif
1963 }
1964 #endif
1965
1966 #if EV_MULTIPLICITY
1967 struct ev_loop *
1968 ev_default_loop_init (unsigned int flags)
1969 #else
1970 int
1971 ev_default_loop (unsigned int flags)
1972 #endif
1973 {
1974 if (!ev_default_loop_ptr)
1975 {
1976 #if EV_MULTIPLICITY
1977 EV_P = ev_default_loop_ptr = &default_loop_struct;
1978 #else
1979 ev_default_loop_ptr = 1;
1980 #endif
1981
1982 loop_init (EV_A_ flags);
1983
1984 if (ev_backend (EV_A))
1985 {
1986 #if EV_CHILD_ENABLE
1987 ev_signal_init (&childev, childcb, SIGCHLD);
1988 ev_set_priority (&childev, EV_MAXPRI);
1989 ev_signal_start (EV_A_ &childev);
1990 ev_unref (EV_A); /* child watcher should not keep loop alive */
1991 #endif
1992 }
1993 else
1994 ev_default_loop_ptr = 0;
1995 }
1996
1997 return ev_default_loop_ptr;
1998 }
1999
2000 void
2001 ev_default_destroy (void)
2002 {
2003 #if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr;
2005 #endif
2006
2007 ev_default_loop_ptr = 0;
2008
2009 #if EV_CHILD_ENABLE
2010 ev_ref (EV_A); /* child watcher */
2011 ev_signal_stop (EV_A_ &childev);
2012 #endif
2013
2014 loop_destroy (EV_A);
2015 }
2016
2017 void
2018 ev_default_fork (void)
2019 {
2020 #if EV_MULTIPLICITY
2021 EV_P = ev_default_loop_ptr;
2022 #endif
2023
2024 postfork = 1; /* must be in line with ev_loop_fork */
2025 }
2026
2027 /*****************************************************************************/
2028
2029 void
2030 ev_invoke (EV_P_ void *w, int revents)
2031 {
2032 EV_CB_INVOKE ((W)w, revents);
2033 }
2034
2035 unsigned int
2036 ev_pending_count (EV_P)
2037 {
2038 int pri;
2039 unsigned int count = 0;
2040
2041 for (pri = NUMPRI; pri--; )
2042 count += pendingcnt [pri];
2043
2044 return count;
2045 }
2046
2047 void noinline
2048 ev_invoke_pending (EV_P)
2049 {
2050 int pri;
2051
2052 for (pri = NUMPRI; pri--; )
2053 while (pendingcnt [pri])
2054 {
2055 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2056
2057 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2058 /* ^ this is no longer true, as pending_w could be here */
2059
2060 p->w->pending = 0;
2061 EV_CB_INVOKE (p->w, p->events);
2062 EV_FREQUENT_CHECK;
2063 }
2064 }
2065
2066 #if EV_IDLE_ENABLE
2067 /* make idle watchers pending. this handles the "call-idle */
2068 /* only when higher priorities are idle" logic */
2069 inline_size void
2070 idle_reify (EV_P)
2071 {
2072 if (expect_false (idleall))
2073 {
2074 int pri;
2075
2076 for (pri = NUMPRI; pri--; )
2077 {
2078 if (pendingcnt [pri])
2079 break;
2080
2081 if (idlecnt [pri])
2082 {
2083 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2084 break;
2085 }
2086 }
2087 }
2088 }
2089 #endif
2090
2091 /* make timers pending */
2092 inline_size void
2093 timers_reify (EV_P)
2094 {
2095 EV_FREQUENT_CHECK;
2096
2097 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2098 {
2099 do
2100 {
2101 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2102
2103 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2104
2105 /* first reschedule or stop timer */
2106 if (w->repeat)
2107 {
2108 ev_at (w) += w->repeat;
2109 if (ev_at (w) < mn_now)
2110 ev_at (w) = mn_now;
2111
2112 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2113
2114 ANHE_at_cache (timers [HEAP0]);
2115 downheap (timers, timercnt, HEAP0);
2116 }
2117 else
2118 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2119
2120 EV_FREQUENT_CHECK;
2121 feed_reverse (EV_A_ (W)w);
2122 }
2123 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2124
2125 feed_reverse_done (EV_A_ EV_TIMER);
2126 }
2127 }
2128
2129 #if EV_PERIODIC_ENABLE
2130 /* make periodics pending */
2131 inline_size void
2132 periodics_reify (EV_P)
2133 {
2134 EV_FREQUENT_CHECK;
2135
2136 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2137 {
2138 int feed_count = 0;
2139
2140 do
2141 {
2142 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2143
2144 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2145
2146 /* first reschedule or stop timer */
2147 if (w->reschedule_cb)
2148 {
2149 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2150
2151 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2152
2153 ANHE_at_cache (periodics [HEAP0]);
2154 downheap (periodics, periodiccnt, HEAP0);
2155 }
2156 else if (w->interval)
2157 {
2158 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2159 /* if next trigger time is not sufficiently in the future, put it there */
2160 /* this might happen because of floating point inexactness */
2161 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2162 {
2163 ev_at (w) += w->interval;
2164
2165 /* if interval is unreasonably low we might still have a time in the past */
2166 /* so correct this. this will make the periodic very inexact, but the user */
2167 /* has effectively asked to get triggered more often than possible */
2168 if (ev_at (w) < ev_rt_now)
2169 ev_at (w) = ev_rt_now;
2170 }
2171
2172 ANHE_at_cache (periodics [HEAP0]);
2173 downheap (periodics, periodiccnt, HEAP0);
2174 }
2175 else
2176 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2177
2178 EV_FREQUENT_CHECK;
2179 feed_reverse (EV_A_ (W)w);
2180 }
2181 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2182
2183 feed_reverse_done (EV_A_ EV_PERIODIC);
2184 }
2185 }
2186
2187 /* simply recalculate all periodics */
2188 /* TODO: maybe ensure that at least one event happens when jumping forward? */
2189 static void noinline
2190 periodics_reschedule (EV_P)
2191 {
2192 int i;
2193
2194 /* adjust periodics after time jump */
2195 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2196 {
2197 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2198
2199 if (w->reschedule_cb)
2200 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2201 else if (w->interval)
2202 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2203
2204 ANHE_at_cache (periodics [i]);
2205 }
2206
2207 reheap (periodics, periodiccnt);
2208 }
2209 #endif
2210
2211 /* adjust all timers by a given offset */
2212 static void noinline
2213 timers_reschedule (EV_P_ ev_tstamp adjust)
2214 {
2215 int i;
2216
2217 for (i = 0; i < timercnt; ++i)
2218 {
2219 ANHE *he = timers + i + HEAP0;
2220 ANHE_w (*he)->at += adjust;
2221 ANHE_at_cache (*he);
2222 }
2223 }
2224
2225 /* fetch new monotonic and realtime times from the kernel */
2226 /* also detect if there was a timejump, and act accordingly */
2227 inline_speed void
2228 time_update (EV_P_ ev_tstamp max_block)
2229 {
2230 #if EV_USE_MONOTONIC
2231 if (expect_true (have_monotonic))
2232 {
2233 int i;
2234 ev_tstamp odiff = rtmn_diff;
2235
2236 mn_now = get_clock ();
2237
2238 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2239 /* interpolate in the meantime */
2240 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2241 {
2242 ev_rt_now = rtmn_diff + mn_now;
2243 return;
2244 }
2245
2246 now_floor = mn_now;
2247 ev_rt_now = ev_time ();
2248
2249 /* loop a few times, before making important decisions.
2250 * on the choice of "4": one iteration isn't enough,
2251 * in case we get preempted during the calls to
2252 * ev_time and get_clock. a second call is almost guaranteed
2253 * to succeed in that case, though. and looping a few more times
2254 * doesn't hurt either as we only do this on time-jumps or
2255 * in the unlikely event of having been preempted here.
2256 */
2257 for (i = 4; --i; )
2258 {
2259 rtmn_diff = ev_rt_now - mn_now;
2260
2261 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2262 return; /* all is well */
2263
2264 ev_rt_now = ev_time ();
2265 mn_now = get_clock ();
2266 now_floor = mn_now;
2267 }
2268
2269 /* no timer adjustment, as the monotonic clock doesn't jump */
2270 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2271 # if EV_PERIODIC_ENABLE
2272 periodics_reschedule (EV_A);
2273 # endif
2274 }
2275 else
2276 #endif
2277 {
2278 ev_rt_now = ev_time ();
2279
2280 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2281 {
2282 /* adjust timers. this is easy, as the offset is the same for all of them */
2283 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2284 #if EV_PERIODIC_ENABLE
2285 periodics_reschedule (EV_A);
2286 #endif
2287 }
2288
2289 mn_now = ev_rt_now;
2290 }
2291 }
2292
2293 void
2294 ev_loop (EV_P_ int flags)
2295 {
2296 #if EV_FEATURE_API
2297 ++loop_depth;
2298 #endif
2299
2300 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2301
2302 loop_done = EVUNLOOP_CANCEL;
2303
2304 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2305
2306 do
2307 {
2308 #if EV_VERIFY >= 2
2309 ev_verify (EV_A);
2310 #endif
2311
2312 #ifndef _WIN32
2313 if (expect_false (curpid)) /* penalise the forking check even more */
2314 if (expect_false (getpid () != curpid))
2315 {
2316 curpid = getpid ();
2317 postfork = 1;
2318 }
2319 #endif
2320
2321 #if EV_FORK_ENABLE
2322 /* we might have forked, so queue fork handlers */
2323 if (expect_false (postfork))
2324 if (forkcnt)
2325 {
2326 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2327 EV_INVOKE_PENDING;
2328 }
2329 #endif
2330
2331 #if EV_PREPARE_ENABLE
2332 /* queue prepare watchers (and execute them) */
2333 if (expect_false (preparecnt))
2334 {
2335 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2336 EV_INVOKE_PENDING;
2337 }
2338 #endif
2339
2340 if (expect_false (loop_done))
2341 break;
2342
2343 /* we might have forked, so reify kernel state if necessary */
2344 if (expect_false (postfork))
2345 loop_fork (EV_A);
2346
2347 /* update fd-related kernel structures */
2348 fd_reify (EV_A);
2349
2350 /* calculate blocking time */
2351 {
2352 ev_tstamp waittime = 0.;
2353 ev_tstamp sleeptime = 0.;
2354
2355 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2356 {
2357 /* remember old timestamp for io_blocktime calculation */
2358 ev_tstamp prev_mn_now = mn_now;
2359
2360 /* update time to cancel out callback processing overhead */
2361 time_update (EV_A_ 1e100);
2362
2363 waittime = MAX_BLOCKTIME;
2364
2365 if (timercnt)
2366 {
2367 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2368 if (waittime > to) waittime = to;
2369 }
2370
2371 #if EV_PERIODIC_ENABLE
2372 if (periodiccnt)
2373 {
2374 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2375 if (waittime > to) waittime = to;
2376 }
2377 #endif
2378
2379 /* don't let timeouts decrease the waittime below timeout_blocktime */
2380 if (expect_false (waittime < timeout_blocktime))
2381 waittime = timeout_blocktime;
2382
2383 /* extra check because io_blocktime is commonly 0 */
2384 if (expect_false (io_blocktime))
2385 {
2386 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2387
2388 if (sleeptime > waittime - backend_fudge)
2389 sleeptime = waittime - backend_fudge;
2390
2391 if (expect_true (sleeptime > 0.))
2392 {
2393 ev_sleep (sleeptime);
2394 waittime -= sleeptime;
2395 }
2396 }
2397 }
2398
2399 #if EV_FEATURE_API
2400 ++loop_count;
2401 #endif
2402 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2403 backend_poll (EV_A_ waittime);
2404 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2405
2406 /* update ev_rt_now, do magic */
2407 time_update (EV_A_ waittime + sleeptime);
2408 }
2409
2410 /* queue pending timers and reschedule them */
2411 timers_reify (EV_A); /* relative timers called last */
2412 #if EV_PERIODIC_ENABLE
2413 periodics_reify (EV_A); /* absolute timers called first */
2414 #endif
2415
2416 #if EV_IDLE_ENABLE
2417 /* queue idle watchers unless other events are pending */
2418 idle_reify (EV_A);
2419 #endif
2420
2421 #if EV_CHECK_ENABLE
2422 /* queue check watchers, to be executed first */
2423 if (expect_false (checkcnt))
2424 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2425 #endif
2426
2427 EV_INVOKE_PENDING;
2428 }
2429 while (expect_true (
2430 activecnt
2431 && !loop_done
2432 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2433 ));
2434
2435 if (loop_done == EVUNLOOP_ONE)
2436 loop_done = EVUNLOOP_CANCEL;
2437
2438 #if EV_FEATURE_API
2439 --loop_depth;
2440 #endif
2441 }
2442
2443 void
2444 ev_unloop (EV_P_ int how)
2445 {
2446 loop_done = how;
2447 }
2448
2449 void
2450 ev_ref (EV_P)
2451 {
2452 ++activecnt;
2453 }
2454
2455 void
2456 ev_unref (EV_P)
2457 {
2458 --activecnt;
2459 }
2460
2461 void
2462 ev_now_update (EV_P)
2463 {
2464 time_update (EV_A_ 1e100);
2465 }
2466
2467 void
2468 ev_suspend (EV_P)
2469 {
2470 ev_now_update (EV_A);
2471 }
2472
2473 void
2474 ev_resume (EV_P)
2475 {
2476 ev_tstamp mn_prev = mn_now;
2477
2478 ev_now_update (EV_A);
2479 timers_reschedule (EV_A_ mn_now - mn_prev);
2480 #if EV_PERIODIC_ENABLE
2481 /* TODO: really do this? */
2482 periodics_reschedule (EV_A);
2483 #endif
2484 }
2485
2486 /*****************************************************************************/
2487 /* singly-linked list management, used when the expected list length is short */
2488
2489 inline_size void
2490 wlist_add (WL *head, WL elem)
2491 {
2492 elem->next = *head;
2493 *head = elem;
2494 }
2495
2496 inline_size void
2497 wlist_del (WL *head, WL elem)
2498 {
2499 while (*head)
2500 {
2501 if (expect_true (*head == elem))
2502 {
2503 *head = elem->next;
2504 break;
2505 }
2506
2507 head = &(*head)->next;
2508 }
2509 }
2510
2511 /* internal, faster, version of ev_clear_pending */
2512 inline_speed void
2513 clear_pending (EV_P_ W w)
2514 {
2515 if (w->pending)
2516 {
2517 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2518 w->pending = 0;
2519 }
2520 }
2521
2522 int
2523 ev_clear_pending (EV_P_ void *w)
2524 {
2525 W w_ = (W)w;
2526 int pending = w_->pending;
2527
2528 if (expect_true (pending))
2529 {
2530 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2531 p->w = (W)&pending_w;
2532 w_->pending = 0;
2533 return p->events;
2534 }
2535 else
2536 return 0;
2537 }
2538
2539 inline_size void
2540 pri_adjust (EV_P_ W w)
2541 {
2542 int pri = ev_priority (w);
2543 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2544 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2545 ev_set_priority (w, pri);
2546 }
2547
2548 inline_speed void
2549 ev_start (EV_P_ W w, int active)
2550 {
2551 pri_adjust (EV_A_ w);
2552 w->active = active;
2553 ev_ref (EV_A);
2554 }
2555
2556 inline_size void
2557 ev_stop (EV_P_ W w)
2558 {
2559 ev_unref (EV_A);
2560 w->active = 0;
2561 }
2562
2563 /*****************************************************************************/
2564
2565 void noinline
2566 ev_io_start (EV_P_ ev_io *w)
2567 {
2568 int fd = w->fd;
2569
2570 if (expect_false (ev_is_active (w)))
2571 return;
2572
2573 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2574 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2575
2576 EV_FREQUENT_CHECK;
2577
2578 ev_start (EV_A_ (W)w, 1);
2579 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2580 wlist_add (&anfds[fd].head, (WL)w);
2581
2582 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2583 w->events &= ~EV__IOFDSET;
2584
2585 EV_FREQUENT_CHECK;
2586 }
2587
2588 void noinline
2589 ev_io_stop (EV_P_ ev_io *w)
2590 {
2591 clear_pending (EV_A_ (W)w);
2592 if (expect_false (!ev_is_active (w)))
2593 return;
2594
2595 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2596
2597 EV_FREQUENT_CHECK;
2598
2599 wlist_del (&anfds[w->fd].head, (WL)w);
2600 ev_stop (EV_A_ (W)w);
2601
2602 fd_change (EV_A_ w->fd, 1);
2603
2604 EV_FREQUENT_CHECK;
2605 }
2606
2607 void noinline
2608 ev_timer_start (EV_P_ ev_timer *w)
2609 {
2610 if (expect_false (ev_is_active (w)))
2611 return;
2612
2613 ev_at (w) += mn_now;
2614
2615 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2616
2617 EV_FREQUENT_CHECK;
2618
2619 ++timercnt;
2620 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2621 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2622 ANHE_w (timers [ev_active (w)]) = (WT)w;
2623 ANHE_at_cache (timers [ev_active (w)]);
2624 upheap (timers, ev_active (w));
2625
2626 EV_FREQUENT_CHECK;
2627
2628 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2629 }
2630
2631 void noinline
2632 ev_timer_stop (EV_P_ ev_timer *w)
2633 {
2634 clear_pending (EV_A_ (W)w);
2635 if (expect_false (!ev_is_active (w)))
2636 return;
2637
2638 EV_FREQUENT_CHECK;
2639
2640 {
2641 int active = ev_active (w);
2642
2643 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2644
2645 --timercnt;
2646
2647 if (expect_true (active < timercnt + HEAP0))
2648 {
2649 timers [active] = timers [timercnt + HEAP0];
2650 adjustheap (timers, timercnt, active);
2651 }
2652 }
2653
2654 ev_at (w) -= mn_now;
2655
2656 ev_stop (EV_A_ (W)w);
2657
2658 EV_FREQUENT_CHECK;
2659 }
2660
2661 void noinline
2662 ev_timer_again (EV_P_ ev_timer *w)
2663 {
2664 EV_FREQUENT_CHECK;
2665
2666 if (ev_is_active (w))
2667 {
2668 if (w->repeat)
2669 {
2670 ev_at (w) = mn_now + w->repeat;
2671 ANHE_at_cache (timers [ev_active (w)]);
2672 adjustheap (timers, timercnt, ev_active (w));
2673 }
2674 else
2675 ev_timer_stop (EV_A_ w);
2676 }
2677 else if (w->repeat)
2678 {
2679 ev_at (w) = w->repeat;
2680 ev_timer_start (EV_A_ w);
2681 }
2682
2683 EV_FREQUENT_CHECK;
2684 }
2685
2686 ev_tstamp
2687 ev_timer_remaining (EV_P_ ev_timer *w)
2688 {
2689 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2690 }
2691
2692 #if EV_PERIODIC_ENABLE
2693 void noinline
2694 ev_periodic_start (EV_P_ ev_periodic *w)
2695 {
2696 if (expect_false (ev_is_active (w)))
2697 return;
2698
2699 if (w->reschedule_cb)
2700 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2701 else if (w->interval)
2702 {
2703 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2704 /* this formula differs from the one in periodic_reify because we do not always round up */
2705 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2706 }
2707 else
2708 ev_at (w) = w->offset;
2709
2710 EV_FREQUENT_CHECK;
2711
2712 ++periodiccnt;
2713 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2714 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2715 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2716 ANHE_at_cache (periodics [ev_active (w)]);
2717 upheap (periodics, ev_active (w));
2718
2719 EV_FREQUENT_CHECK;
2720
2721 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2722 }
2723
2724 void noinline
2725 ev_periodic_stop (EV_P_ ev_periodic *w)
2726 {
2727 clear_pending (EV_A_ (W)w);
2728 if (expect_false (!ev_is_active (w)))
2729 return;
2730
2731 EV_FREQUENT_CHECK;
2732
2733 {
2734 int active = ev_active (w);
2735
2736 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2737
2738 --periodiccnt;
2739
2740 if (expect_true (active < periodiccnt + HEAP0))
2741 {
2742 periodics [active] = periodics [periodiccnt + HEAP0];
2743 adjustheap (periodics, periodiccnt, active);
2744 }
2745 }
2746
2747 ev_stop (EV_A_ (W)w);
2748
2749 EV_FREQUENT_CHECK;
2750 }
2751
2752 void noinline
2753 ev_periodic_again (EV_P_ ev_periodic *w)
2754 {
2755 /* TODO: use adjustheap and recalculation */
2756 ev_periodic_stop (EV_A_ w);
2757 ev_periodic_start (EV_A_ w);
2758 }
2759 #endif
2760
2761 #ifndef SA_RESTART
2762 # define SA_RESTART 0
2763 #endif
2764
2765 #if EV_SIGNAL_ENABLE
2766
2767 void noinline
2768 ev_signal_start (EV_P_ ev_signal *w)
2769 {
2770 if (expect_false (ev_is_active (w)))
2771 return;
2772
2773 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2774
2775 #if EV_MULTIPLICITY
2776 assert (("libev: a signal must not be attached to two different loops",
2777 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2778
2779 signals [w->signum - 1].loop = EV_A;
2780 #endif
2781
2782 EV_FREQUENT_CHECK;
2783
2784 #if EV_USE_SIGNALFD
2785 if (sigfd == -2)
2786 {
2787 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2788 if (sigfd < 0 && errno == EINVAL)
2789 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2790
2791 if (sigfd >= 0)
2792 {
2793 fd_intern (sigfd); /* doing it twice will not hurt */
2794
2795 sigemptyset (&sigfd_set);
2796
2797 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2798 ev_set_priority (&sigfd_w, EV_MAXPRI);
2799 ev_io_start (EV_A_ &sigfd_w);
2800 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2801 }
2802 }
2803
2804 if (sigfd >= 0)
2805 {
2806 /* TODO: check .head */
2807 sigaddset (&sigfd_set, w->signum);
2808 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2809
2810 signalfd (sigfd, &sigfd_set, 0);
2811 }
2812 #endif
2813
2814 ev_start (EV_A_ (W)w, 1);
2815 wlist_add (&signals [w->signum - 1].head, (WL)w);
2816
2817 if (!((WL)w)->next)
2818 # if EV_USE_SIGNALFD
2819 if (sigfd < 0) /*TODO*/
2820 # endif
2821 {
2822 # ifdef _WIN32
2823 evpipe_init (EV_A);
2824
2825 signal (w->signum, ev_sighandler);
2826 # else
2827 struct sigaction sa;
2828
2829 evpipe_init (EV_A);
2830
2831 sa.sa_handler = ev_sighandler;
2832 sigfillset (&sa.sa_mask);
2833 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2834 sigaction (w->signum, &sa, 0);
2835
2836 sigemptyset (&sa.sa_mask);
2837 sigaddset (&sa.sa_mask, w->signum);
2838 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2839 #endif
2840 }
2841
2842 EV_FREQUENT_CHECK;
2843 }
2844
2845 void noinline
2846 ev_signal_stop (EV_P_ ev_signal *w)
2847 {
2848 clear_pending (EV_A_ (W)w);
2849 if (expect_false (!ev_is_active (w)))
2850 return;
2851
2852 EV_FREQUENT_CHECK;
2853
2854 wlist_del (&signals [w->signum - 1].head, (WL)w);
2855 ev_stop (EV_A_ (W)w);
2856
2857 if (!signals [w->signum - 1].head)
2858 {
2859 #if EV_MULTIPLICITY
2860 signals [w->signum - 1].loop = 0; /* unattach from signal */
2861 #endif
2862 #if EV_USE_SIGNALFD
2863 if (sigfd >= 0)
2864 {
2865 sigset_t ss;
2866
2867 sigemptyset (&ss);
2868 sigaddset (&ss, w->signum);
2869 sigdelset (&sigfd_set, w->signum);
2870
2871 signalfd (sigfd, &sigfd_set, 0);
2872 sigprocmask (SIG_UNBLOCK, &ss, 0);
2873 }
2874 else
2875 #endif
2876 signal (w->signum, SIG_DFL);
2877 }
2878
2879 EV_FREQUENT_CHECK;
2880 }
2881
2882 #endif
2883
2884 #if EV_CHILD_ENABLE
2885
2886 void
2887 ev_child_start (EV_P_ ev_child *w)
2888 {
2889 #if EV_MULTIPLICITY
2890 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2891 #endif
2892 if (expect_false (ev_is_active (w)))
2893 return;
2894
2895 EV_FREQUENT_CHECK;
2896
2897 ev_start (EV_A_ (W)w, 1);
2898 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2899
2900 EV_FREQUENT_CHECK;
2901 }
2902
2903 void
2904 ev_child_stop (EV_P_ ev_child *w)
2905 {
2906 clear_pending (EV_A_ (W)w);
2907 if (expect_false (!ev_is_active (w)))
2908 return;
2909
2910 EV_FREQUENT_CHECK;
2911
2912 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2913 ev_stop (EV_A_ (W)w);
2914
2915 EV_FREQUENT_CHECK;
2916 }
2917
2918 #endif
2919
2920 #if EV_STAT_ENABLE
2921
2922 # ifdef _WIN32
2923 # undef lstat
2924 # define lstat(a,b) _stati64 (a,b)
2925 # endif
2926
2927 #define DEF_STAT_INTERVAL 5.0074891
2928 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2929 #define MIN_STAT_INTERVAL 0.1074891
2930
2931 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2932
2933 #if EV_USE_INOTIFY
2934
2935 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2936 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2937
2938 static void noinline
2939 infy_add (EV_P_ ev_stat *w)
2940 {
2941 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2942
2943 if (w->wd >= 0)
2944 {
2945 struct statfs sfs;
2946
2947 /* now local changes will be tracked by inotify, but remote changes won't */
2948 /* unless the filesystem is known to be local, we therefore still poll */
2949 /* also do poll on <2.6.25, but with normal frequency */
2950
2951 if (!fs_2625)
2952 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2953 else if (!statfs (w->path, &sfs)
2954 && (sfs.f_type == 0x1373 /* devfs */
2955 || sfs.f_type == 0xEF53 /* ext2/3 */
2956 || sfs.f_type == 0x3153464a /* jfs */
2957 || sfs.f_type == 0x52654973 /* reiser3 */
2958 || sfs.f_type == 0x01021994 /* tempfs */
2959 || sfs.f_type == 0x58465342 /* xfs */))
2960 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2961 else
2962 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2963 }
2964 else
2965 {
2966 /* can't use inotify, continue to stat */
2967 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2968
2969 /* if path is not there, monitor some parent directory for speedup hints */
2970 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2971 /* but an efficiency issue only */
2972 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2973 {
2974 char path [4096];
2975 strcpy (path, w->path);
2976
2977 do
2978 {
2979 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2980 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2981
2982 char *pend = strrchr (path, '/');
2983
2984 if (!pend || pend == path)
2985 break;
2986
2987 *pend = 0;
2988 w->wd = inotify_add_watch (fs_fd, path, mask);
2989 }
2990 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2991 }
2992 }
2993
2994 if (w->wd >= 0)
2995 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2996
2997 /* now re-arm timer, if required */
2998 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2999 ev_timer_again (EV_A_ &w->timer);
3000 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3001 }
3002
3003 static void noinline
3004 infy_del (EV_P_ ev_stat *w)
3005 {
3006 int slot;
3007 int wd = w->wd;
3008
3009 if (wd < 0)
3010 return;
3011
3012 w->wd = -2;
3013 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3014 wlist_del (&fs_hash [slot].head, (WL)w);
3015
3016 /* remove this watcher, if others are watching it, they will rearm */
3017 inotify_rm_watch (fs_fd, wd);
3018 }
3019
3020 static void noinline
3021 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3022 {
3023 if (slot < 0)
3024 /* overflow, need to check for all hash slots */
3025 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3026 infy_wd (EV_A_ slot, wd, ev);
3027 else
3028 {
3029 WL w_;
3030
3031 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3032 {
3033 ev_stat *w = (ev_stat *)w_;
3034 w_ = w_->next; /* lets us remove this watcher and all before it */
3035
3036 if (w->wd == wd || wd == -1)
3037 {
3038 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3039 {
3040 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3041 w->wd = -1;
3042 infy_add (EV_A_ w); /* re-add, no matter what */
3043 }
3044
3045 stat_timer_cb (EV_A_ &w->timer, 0);
3046 }
3047 }
3048 }
3049 }
3050
3051 static void
3052 infy_cb (EV_P_ ev_io *w, int revents)
3053 {
3054 char buf [EV_INOTIFY_BUFSIZE];
3055 int ofs;
3056 int len = read (fs_fd, buf, sizeof (buf));
3057
3058 for (ofs = 0; ofs < len; )
3059 {
3060 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3061 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3062 ofs += sizeof (struct inotify_event) + ev->len;
3063 }
3064 }
3065
3066 inline_size unsigned int
3067 ev_linux_version (void)
3068 {
3069 struct utsname buf;
3070 unsigned int v;
3071 int i;
3072 char *p = buf.release;
3073
3074 if (uname (&buf))
3075 return 0;
3076
3077 for (i = 3+1; --i; )
3078 {
3079 unsigned int c = 0;
3080
3081 for (;;)
3082 {
3083 if (*p >= '0' && *p <= '9')
3084 c = c * 10 + *p++ - '0';
3085 else
3086 {
3087 p += *p == '.';
3088 break;
3089 }
3090 }
3091
3092 v = (v << 8) | c;
3093 }
3094
3095 return v;
3096 }
3097
3098 inline_size void
3099 ev_check_2625 (EV_P)
3100 {
3101 /* kernels < 2.6.25 are borked
3102 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3103 */
3104 if (ev_linux_version () < 0x020619)
3105 return;
3106
3107 fs_2625 = 1;
3108 }
3109
3110 inline_size int
3111 infy_newfd (void)
3112 {
3113 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3114 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3115 if (fd >= 0)
3116 return fd;
3117 #endif
3118 return inotify_init ();
3119 }
3120
3121 inline_size void
3122 infy_init (EV_P)
3123 {
3124 if (fs_fd != -2)
3125 return;
3126
3127 fs_fd = -1;
3128
3129 ev_check_2625 (EV_A);
3130
3131 fs_fd = infy_newfd ();
3132
3133 if (fs_fd >= 0)
3134 {
3135 fd_intern (fs_fd);
3136 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3137 ev_set_priority (&fs_w, EV_MAXPRI);
3138 ev_io_start (EV_A_ &fs_w);
3139 ev_unref (EV_A);
3140 }
3141 }
3142
3143 inline_size void
3144 infy_fork (EV_P)
3145 {
3146 int slot;
3147
3148 if (fs_fd < 0)
3149 return;
3150
3151 ev_ref (EV_A);
3152 ev_io_stop (EV_A_ &fs_w);
3153 close (fs_fd);
3154 fs_fd = infy_newfd ();
3155
3156 if (fs_fd >= 0)
3157 {
3158 fd_intern (fs_fd);
3159 ev_io_set (&fs_w, fs_fd, EV_READ);
3160 ev_io_start (EV_A_ &fs_w);
3161 ev_unref (EV_A);
3162 }
3163
3164 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3165 {
3166 WL w_ = fs_hash [slot].head;
3167 fs_hash [slot].head = 0;
3168
3169 while (w_)
3170 {
3171 ev_stat *w = (ev_stat *)w_;
3172 w_ = w_->next; /* lets us add this watcher */
3173
3174 w->wd = -1;
3175
3176 if (fs_fd >= 0)
3177 infy_add (EV_A_ w); /* re-add, no matter what */
3178 else
3179 {
3180 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3181 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3182 ev_timer_again (EV_A_ &w->timer);
3183 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3184 }
3185 }
3186 }
3187 }
3188
3189 #endif
3190
3191 #ifdef _WIN32
3192 # define EV_LSTAT(p,b) _stati64 (p, b)
3193 #else
3194 # define EV_LSTAT(p,b) lstat (p, b)
3195 #endif
3196
3197 void
3198 ev_stat_stat (EV_P_ ev_stat *w)
3199 {
3200 if (lstat (w->path, &w->attr) < 0)
3201 w->attr.st_nlink = 0;
3202 else if (!w->attr.st_nlink)
3203 w->attr.st_nlink = 1;
3204 }
3205
3206 static void noinline
3207 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3208 {
3209 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3210
3211 ev_statdata prev = w->attr;
3212 ev_stat_stat (EV_A_ w);
3213
3214 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3215 if (
3216 prev.st_dev != w->attr.st_dev
3217 || prev.st_ino != w->attr.st_ino
3218 || prev.st_mode != w->attr.st_mode
3219 || prev.st_nlink != w->attr.st_nlink
3220 || prev.st_uid != w->attr.st_uid
3221 || prev.st_gid != w->attr.st_gid
3222 || prev.st_rdev != w->attr.st_rdev
3223 || prev.st_size != w->attr.st_size
3224 || prev.st_atime != w->attr.st_atime
3225 || prev.st_mtime != w->attr.st_mtime
3226 || prev.st_ctime != w->attr.st_ctime
3227 ) {
3228 /* we only update w->prev on actual differences */
3229 /* in case we test more often than invoke the callback, */
3230 /* to ensure that prev is always different to attr */
3231 w->prev = prev;
3232
3233 #if EV_USE_INOTIFY
3234 if (fs_fd >= 0)
3235 {
3236 infy_del (EV_A_ w);
3237 infy_add (EV_A_ w);
3238 ev_stat_stat (EV_A_ w); /* avoid race... */
3239 }
3240 #endif
3241
3242 ev_feed_event (EV_A_ w, EV_STAT);
3243 }
3244 }
3245
3246 void
3247 ev_stat_start (EV_P_ ev_stat *w)
3248 {
3249 if (expect_false (ev_is_active (w)))
3250 return;
3251
3252 ev_stat_stat (EV_A_ w);
3253
3254 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3255 w->interval = MIN_STAT_INTERVAL;
3256
3257 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3258 ev_set_priority (&w->timer, ev_priority (w));
3259
3260 #if EV_USE_INOTIFY
3261 infy_init (EV_A);
3262
3263 if (fs_fd >= 0)
3264 infy_add (EV_A_ w);
3265 else
3266 #endif
3267 {
3268 ev_timer_again (EV_A_ &w->timer);
3269 ev_unref (EV_A);
3270 }
3271
3272 ev_start (EV_A_ (W)w, 1);
3273
3274 EV_FREQUENT_CHECK;
3275 }
3276
3277 void
3278 ev_stat_stop (EV_P_ ev_stat *w)
3279 {
3280 clear_pending (EV_A_ (W)w);
3281 if (expect_false (!ev_is_active (w)))
3282 return;
3283
3284 EV_FREQUENT_CHECK;
3285
3286 #if EV_USE_INOTIFY
3287 infy_del (EV_A_ w);
3288 #endif
3289
3290 if (ev_is_active (&w->timer))
3291 {
3292 ev_ref (EV_A);
3293 ev_timer_stop (EV_A_ &w->timer);
3294 }
3295
3296 ev_stop (EV_A_ (W)w);
3297
3298 EV_FREQUENT_CHECK;
3299 }
3300 #endif
3301
3302 #if EV_IDLE_ENABLE
3303 void
3304 ev_idle_start (EV_P_ ev_idle *w)
3305 {
3306 if (expect_false (ev_is_active (w)))
3307 return;
3308
3309 pri_adjust (EV_A_ (W)w);
3310
3311 EV_FREQUENT_CHECK;
3312
3313 {
3314 int active = ++idlecnt [ABSPRI (w)];
3315
3316 ++idleall;
3317 ev_start (EV_A_ (W)w, active);
3318
3319 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3320 idles [ABSPRI (w)][active - 1] = w;
3321 }
3322
3323 EV_FREQUENT_CHECK;
3324 }
3325
3326 void
3327 ev_idle_stop (EV_P_ ev_idle *w)
3328 {
3329 clear_pending (EV_A_ (W)w);
3330 if (expect_false (!ev_is_active (w)))
3331 return;
3332
3333 EV_FREQUENT_CHECK;
3334
3335 {
3336 int active = ev_active (w);
3337
3338 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3339 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3340
3341 ev_stop (EV_A_ (W)w);
3342 --idleall;
3343 }
3344
3345 EV_FREQUENT_CHECK;
3346 }
3347 #endif
3348
3349 #if EV_PREPARE_ENABLE
3350 void
3351 ev_prepare_start (EV_P_ ev_prepare *w)
3352 {
3353 if (expect_false (ev_is_active (w)))
3354 return;
3355
3356 EV_FREQUENT_CHECK;
3357
3358 ev_start (EV_A_ (W)w, ++preparecnt);
3359 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3360 prepares [preparecnt - 1] = w;
3361
3362 EV_FREQUENT_CHECK;
3363 }
3364
3365 void
3366 ev_prepare_stop (EV_P_ ev_prepare *w)
3367 {
3368 clear_pending (EV_A_ (W)w);
3369 if (expect_false (!ev_is_active (w)))
3370 return;
3371
3372 EV_FREQUENT_CHECK;
3373
3374 {
3375 int active = ev_active (w);
3376
3377 prepares [active - 1] = prepares [--preparecnt];
3378 ev_active (prepares [active - 1]) = active;
3379 }
3380
3381 ev_stop (EV_A_ (W)w);
3382
3383 EV_FREQUENT_CHECK;
3384 }
3385 #endif
3386
3387 #if EV_CHECK_ENABLE
3388 void
3389 ev_check_start (EV_P_ ev_check *w)
3390 {
3391 if (expect_false (ev_is_active (w)))
3392 return;
3393
3394 EV_FREQUENT_CHECK;
3395
3396 ev_start (EV_A_ (W)w, ++checkcnt);
3397 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3398 checks [checkcnt - 1] = w;
3399
3400 EV_FREQUENT_CHECK;
3401 }
3402
3403 void
3404 ev_check_stop (EV_P_ ev_check *w)
3405 {
3406 clear_pending (EV_A_ (W)w);
3407 if (expect_false (!ev_is_active (w)))
3408 return;
3409
3410 EV_FREQUENT_CHECK;
3411
3412 {
3413 int active = ev_active (w);
3414
3415 checks [active - 1] = checks [--checkcnt];
3416 ev_active (checks [active - 1]) = active;
3417 }
3418
3419 ev_stop (EV_A_ (W)w);
3420
3421 EV_FREQUENT_CHECK;
3422 }
3423 #endif
3424
3425 #if EV_EMBED_ENABLE
3426 void noinline
3427 ev_embed_sweep (EV_P_ ev_embed *w)
3428 {
3429 ev_loop (w->other, EVLOOP_NONBLOCK);
3430 }
3431
3432 static void
3433 embed_io_cb (EV_P_ ev_io *io, int revents)
3434 {
3435 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3436
3437 if (ev_cb (w))
3438 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3439 else
3440 ev_loop (w->other, EVLOOP_NONBLOCK);
3441 }
3442
3443 static void
3444 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3445 {
3446 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3447
3448 {
3449 EV_P = w->other;
3450
3451 while (fdchangecnt)
3452 {
3453 fd_reify (EV_A);
3454 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3455 }
3456 }
3457 }
3458
3459 static void
3460 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3461 {
3462 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3463
3464 ev_embed_stop (EV_A_ w);
3465
3466 {
3467 EV_P = w->other;
3468
3469 ev_loop_fork (EV_A);
3470 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3471 }
3472
3473 ev_embed_start (EV_A_ w);
3474 }
3475
3476 #if 0
3477 static void
3478 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3479 {
3480 ev_idle_stop (EV_A_ idle);
3481 }
3482 #endif
3483
3484 void
3485 ev_embed_start (EV_P_ ev_embed *w)
3486 {
3487 if (expect_false (ev_is_active (w)))
3488 return;
3489
3490 {
3491 EV_P = w->other;
3492 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3493 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3494 }
3495
3496 EV_FREQUENT_CHECK;
3497
3498 ev_set_priority (&w->io, ev_priority (w));
3499 ev_io_start (EV_A_ &w->io);
3500
3501 ev_prepare_init (&w->prepare, embed_prepare_cb);
3502 ev_set_priority (&w->prepare, EV_MINPRI);
3503 ev_prepare_start (EV_A_ &w->prepare);
3504
3505 ev_fork_init (&w->fork, embed_fork_cb);
3506 ev_fork_start (EV_A_ &w->fork);
3507
3508 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3509
3510 ev_start (EV_A_ (W)w, 1);
3511
3512 EV_FREQUENT_CHECK;
3513 }
3514
3515 void
3516 ev_embed_stop (EV_P_ ev_embed *w)
3517 {
3518 clear_pending (EV_A_ (W)w);
3519 if (expect_false (!ev_is_active (w)))
3520 return;
3521
3522 EV_FREQUENT_CHECK;
3523
3524 ev_io_stop (EV_A_ &w->io);
3525 ev_prepare_stop (EV_A_ &w->prepare);
3526 ev_fork_stop (EV_A_ &w->fork);
3527
3528 ev_stop (EV_A_ (W)w);
3529
3530 EV_FREQUENT_CHECK;
3531 }
3532 #endif
3533
3534 #if EV_FORK_ENABLE
3535 void
3536 ev_fork_start (EV_P_ ev_fork *w)
3537 {
3538 if (expect_false (ev_is_active (w)))
3539 return;
3540
3541 EV_FREQUENT_CHECK;
3542
3543 ev_start (EV_A_ (W)w, ++forkcnt);
3544 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3545 forks [forkcnt - 1] = w;
3546
3547 EV_FREQUENT_CHECK;
3548 }
3549
3550 void
3551 ev_fork_stop (EV_P_ ev_fork *w)
3552 {
3553 clear_pending (EV_A_ (W)w);
3554 if (expect_false (!ev_is_active (w)))
3555 return;
3556
3557 EV_FREQUENT_CHECK;
3558
3559 {
3560 int active = ev_active (w);
3561
3562 forks [active - 1] = forks [--forkcnt];
3563 ev_active (forks [active - 1]) = active;
3564 }
3565
3566 ev_stop (EV_A_ (W)w);
3567
3568 EV_FREQUENT_CHECK;
3569 }
3570 #endif
3571
3572 #if EV_ASYNC_ENABLE
3573 void
3574 ev_async_start (EV_P_ ev_async *w)
3575 {
3576 if (expect_false (ev_is_active (w)))
3577 return;
3578
3579 evpipe_init (EV_A);
3580
3581 EV_FREQUENT_CHECK;
3582
3583 ev_start (EV_A_ (W)w, ++asynccnt);
3584 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3585 asyncs [asynccnt - 1] = w;
3586
3587 EV_FREQUENT_CHECK;
3588 }
3589
3590 void
3591 ev_async_stop (EV_P_ ev_async *w)
3592 {
3593 clear_pending (EV_A_ (W)w);
3594 if (expect_false (!ev_is_active (w)))
3595 return;
3596
3597 EV_FREQUENT_CHECK;
3598
3599 {
3600 int active = ev_active (w);
3601
3602 asyncs [active - 1] = asyncs [--asynccnt];
3603 ev_active (asyncs [active - 1]) = active;
3604 }
3605
3606 ev_stop (EV_A_ (W)w);
3607
3608 EV_FREQUENT_CHECK;
3609 }
3610
3611 void
3612 ev_async_send (EV_P_ ev_async *w)
3613 {
3614 w->sent = 1;
3615 evpipe_write (EV_A_ &async_pending);
3616 }
3617 #endif
3618
3619 /*****************************************************************************/
3620
3621 struct ev_once
3622 {
3623 ev_io io;
3624 ev_timer to;
3625 void (*cb)(int revents, void *arg);
3626 void *arg;
3627 };
3628
3629 static void
3630 once_cb (EV_P_ struct ev_once *once, int revents)
3631 {
3632 void (*cb)(int revents, void *arg) = once->cb;
3633 void *arg = once->arg;
3634
3635 ev_io_stop (EV_A_ &once->io);
3636 ev_timer_stop (EV_A_ &once->to);
3637 ev_free (once);
3638
3639 cb (revents, arg);
3640 }
3641
3642 static void
3643 once_cb_io (EV_P_ ev_io *w, int revents)
3644 {
3645 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3646
3647 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3648 }
3649
3650 static void
3651 once_cb_to (EV_P_ ev_timer *w, int revents)
3652 {
3653 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3654
3655 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3656 }
3657
3658 void
3659 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3660 {
3661 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3662
3663 if (expect_false (!once))
3664 {
3665 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3666 return;
3667 }
3668
3669 once->cb = cb;
3670 once->arg = arg;
3671
3672 ev_init (&once->io, once_cb_io);
3673 if (fd >= 0)
3674 {
3675 ev_io_set (&once->io, fd, events);
3676 ev_io_start (EV_A_ &once->io);
3677 }
3678
3679 ev_init (&once->to, once_cb_to);
3680 if (timeout >= 0.)
3681 {
3682 ev_timer_set (&once->to, timeout, 0.);
3683 ev_timer_start (EV_A_ &once->to);
3684 }
3685 }
3686
3687 /*****************************************************************************/
3688
3689 #if EV_WALK_ENABLE
3690 void
3691 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3692 {
3693 int i, j;
3694 ev_watcher_list *wl, *wn;
3695
3696 if (types & (EV_IO | EV_EMBED))
3697 for (i = 0; i < anfdmax; ++i)
3698 for (wl = anfds [i].head; wl; )
3699 {
3700 wn = wl->next;
3701
3702 #if EV_EMBED_ENABLE
3703 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3704 {
3705 if (types & EV_EMBED)
3706 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3707 }
3708 else
3709 #endif
3710 #if EV_USE_INOTIFY
3711 if (ev_cb ((ev_io *)wl) == infy_cb)
3712 ;
3713 else
3714 #endif
3715 if ((ev_io *)wl != &pipe_w)
3716 if (types & EV_IO)
3717 cb (EV_A_ EV_IO, wl);
3718
3719 wl = wn;
3720 }
3721
3722 if (types & (EV_TIMER | EV_STAT))
3723 for (i = timercnt + HEAP0; i-- > HEAP0; )
3724 #if EV_STAT_ENABLE
3725 /*TODO: timer is not always active*/
3726 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3727 {
3728 if (types & EV_STAT)
3729 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3730 }
3731 else
3732 #endif
3733 if (types & EV_TIMER)
3734 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3735
3736 #if EV_PERIODIC_ENABLE
3737 if (types & EV_PERIODIC)
3738 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3739 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3740 #endif
3741
3742 #if EV_IDLE_ENABLE
3743 if (types & EV_IDLE)
3744 for (j = NUMPRI; i--; )
3745 for (i = idlecnt [j]; i--; )
3746 cb (EV_A_ EV_IDLE, idles [j][i]);
3747 #endif
3748
3749 #if EV_FORK_ENABLE
3750 if (types & EV_FORK)
3751 for (i = forkcnt; i--; )
3752 if (ev_cb (forks [i]) != embed_fork_cb)
3753 cb (EV_A_ EV_FORK, forks [i]);
3754 #endif
3755
3756 #if EV_ASYNC_ENABLE
3757 if (types & EV_ASYNC)
3758 for (i = asynccnt; i--; )
3759 cb (EV_A_ EV_ASYNC, asyncs [i]);
3760 #endif
3761
3762 #if EV_PREPARE_ENABLE
3763 if (types & EV_PREPARE)
3764 for (i = preparecnt; i--; )
3765 # if EV_EMBED_ENABLE
3766 if (ev_cb (prepares [i]) != embed_prepare_cb)
3767 # endif
3768 cb (EV_A_ EV_PREPARE, prepares [i]);
3769 #endif
3770
3771 #if EV_CHECK_ENABLE
3772 if (types & EV_CHECK)
3773 for (i = checkcnt; i--; )
3774 cb (EV_A_ EV_CHECK, checks [i]);
3775 #endif
3776
3777 #if EV_SIGNAL_ENABLE
3778 if (types & EV_SIGNAL)
3779 for (i = 0; i < EV_NSIG - 1; ++i)
3780 for (wl = signals [i].head; wl; )
3781 {
3782 wn = wl->next;
3783 cb (EV_A_ EV_SIGNAL, wl);
3784 wl = wn;
3785 }
3786 #endif
3787
3788 #if EV_CHILD_ENABLE
3789 if (types & EV_CHILD)
3790 for (i = (EV_PID_HASHSIZE); i--; )
3791 for (wl = childs [i]; wl; )
3792 {
3793 wn = wl->next;
3794 cb (EV_A_ EV_CHILD, wl);
3795 wl = wn;
3796 }
3797 #endif
3798 /* EV_STAT 0x00001000 /* stat data changed */
3799 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3800 }
3801 #endif
3802
3803 #if EV_MULTIPLICITY
3804 #include "ev_wrap.h"
3805 #endif
3806
3807 #ifdef __cplusplus
3808 }
3809 #endif
3810