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Revision: 1.350
Committed: Sat Oct 16 00:59:56 2010 UTC (13 years, 9 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.349: +16 -13 lines
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# 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 o_events = anfd->events;
949 unsigned char o_reify = anfd->reify;
950
951 anfd->reify = 0;
952
953 #if EV_SELECT_IS_WINSOCKET
954 if (o_reify & EV__IOFDSET)
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 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
963 {
964 anfd->events = 0;
965
966 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
967 anfd->events |= (unsigned char)w->events;
968
969 if (o_events !=anfd-> events)
970 o_reify = EV__IOFDSET; /* actually |= */
971 }
972
973 if (o_reify & EV__IOFDSET)
974 backend_modify (EV_A_ fd, o_events, anfd->events);
975 }
976
977 fdchangecnt = 0;
978 }
979
980 /* something about the given fd changed */
981 inline_size void
982 fd_change (EV_P_ int fd, int flags)
983 {
984 unsigned char reify = anfds [fd].reify;
985 anfds [fd].reify |= flags;
986
987 if (expect_true (!reify))
988 {
989 ++fdchangecnt;
990 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
991 fdchanges [fdchangecnt - 1] = fd;
992 }
993 }
994
995 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
996 inline_speed void
997 fd_kill (EV_P_ int fd)
998 {
999 ev_io *w;
1000
1001 while ((w = (ev_io *)anfds [fd].head))
1002 {
1003 ev_io_stop (EV_A_ w);
1004 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1005 }
1006 }
1007
1008 /* check whether the given fd is actually valid, for error recovery */
1009 inline_size int
1010 fd_valid (int fd)
1011 {
1012 #ifdef _WIN32
1013 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1014 #else
1015 return fcntl (fd, F_GETFD) != -1;
1016 #endif
1017 }
1018
1019 /* called on EBADF to verify fds */
1020 static void noinline
1021 fd_ebadf (EV_P)
1022 {
1023 int fd;
1024
1025 for (fd = 0; fd < anfdmax; ++fd)
1026 if (anfds [fd].events)
1027 if (!fd_valid (fd) && errno == EBADF)
1028 fd_kill (EV_A_ fd);
1029 }
1030
1031 /* called on ENOMEM in select/poll to kill some fds and retry */
1032 static void noinline
1033 fd_enomem (EV_P)
1034 {
1035 int fd;
1036
1037 for (fd = anfdmax; fd--; )
1038 if (anfds [fd].events)
1039 {
1040 fd_kill (EV_A_ fd);
1041 break;
1042 }
1043 }
1044
1045 /* usually called after fork if backend needs to re-arm all fds from scratch */
1046 static void noinline
1047 fd_rearm_all (EV_P)
1048 {
1049 int fd;
1050
1051 for (fd = 0; fd < anfdmax; ++fd)
1052 if (anfds [fd].events)
1053 {
1054 anfds [fd].events = 0;
1055 anfds [fd].emask = 0;
1056 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1057 }
1058 }
1059
1060 /* used to prepare libev internal fd's */
1061 /* this is not fork-safe */
1062 inline_speed void
1063 fd_intern (int fd)
1064 {
1065 #ifdef _WIN32
1066 unsigned long arg = 1;
1067 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1068 #else
1069 fcntl (fd, F_SETFD, FD_CLOEXEC);
1070 fcntl (fd, F_SETFL, O_NONBLOCK);
1071 #endif
1072 }
1073
1074 /*****************************************************************************/
1075
1076 /*
1077 * the heap functions want a real array index. array index 0 is guaranteed to not
1078 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1079 * the branching factor of the d-tree.
1080 */
1081
1082 /*
1083 * at the moment we allow libev the luxury of two heaps,
1084 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1085 * which is more cache-efficient.
1086 * the difference is about 5% with 50000+ watchers.
1087 */
1088 #if EV_USE_4HEAP
1089
1090 #define DHEAP 4
1091 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1092 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1093 #define UPHEAP_DONE(p,k) ((p) == (k))
1094
1095 /* away from the root */
1096 inline_speed void
1097 downheap (ANHE *heap, int N, int k)
1098 {
1099 ANHE he = heap [k];
1100 ANHE *E = heap + N + HEAP0;
1101
1102 for (;;)
1103 {
1104 ev_tstamp minat;
1105 ANHE *minpos;
1106 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1107
1108 /* find minimum child */
1109 if (expect_true (pos + DHEAP - 1 < E))
1110 {
1111 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1112 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1113 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1114 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1115 }
1116 else if (pos < E)
1117 {
1118 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1119 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1120 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1121 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1122 }
1123 else
1124 break;
1125
1126 if (ANHE_at (he) <= minat)
1127 break;
1128
1129 heap [k] = *minpos;
1130 ev_active (ANHE_w (*minpos)) = k;
1131
1132 k = minpos - heap;
1133 }
1134
1135 heap [k] = he;
1136 ev_active (ANHE_w (he)) = k;
1137 }
1138
1139 #else /* 4HEAP */
1140
1141 #define HEAP0 1
1142 #define HPARENT(k) ((k) >> 1)
1143 #define UPHEAP_DONE(p,k) (!(p))
1144
1145 /* away from the root */
1146 inline_speed void
1147 downheap (ANHE *heap, int N, int k)
1148 {
1149 ANHE he = heap [k];
1150
1151 for (;;)
1152 {
1153 int c = k << 1;
1154
1155 if (c >= N + HEAP0)
1156 break;
1157
1158 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1159 ? 1 : 0;
1160
1161 if (ANHE_at (he) <= ANHE_at (heap [c]))
1162 break;
1163
1164 heap [k] = heap [c];
1165 ev_active (ANHE_w (heap [k])) = k;
1166
1167 k = c;
1168 }
1169
1170 heap [k] = he;
1171 ev_active (ANHE_w (he)) = k;
1172 }
1173 #endif
1174
1175 /* towards the root */
1176 inline_speed void
1177 upheap (ANHE *heap, int k)
1178 {
1179 ANHE he = heap [k];
1180
1181 for (;;)
1182 {
1183 int p = HPARENT (k);
1184
1185 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1186 break;
1187
1188 heap [k] = heap [p];
1189 ev_active (ANHE_w (heap [k])) = k;
1190 k = p;
1191 }
1192
1193 heap [k] = he;
1194 ev_active (ANHE_w (he)) = k;
1195 }
1196
1197 /* move an element suitably so it is in a correct place */
1198 inline_size void
1199 adjustheap (ANHE *heap, int N, int k)
1200 {
1201 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1202 upheap (heap, k);
1203 else
1204 downheap (heap, N, k);
1205 }
1206
1207 /* rebuild the heap: this function is used only once and executed rarely */
1208 inline_size void
1209 reheap (ANHE *heap, int N)
1210 {
1211 int i;
1212
1213 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1214 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1215 for (i = 0; i < N; ++i)
1216 upheap (heap, i + HEAP0);
1217 }
1218
1219 /*****************************************************************************/
1220
1221 /* associate signal watchers to a signal signal */
1222 typedef struct
1223 {
1224 EV_ATOMIC_T pending;
1225 #if EV_MULTIPLICITY
1226 EV_P;
1227 #endif
1228 WL head;
1229 } ANSIG;
1230
1231 static ANSIG signals [EV_NSIG - 1];
1232
1233 /*****************************************************************************/
1234
1235 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1236
1237 static void noinline
1238 evpipe_init (EV_P)
1239 {
1240 if (!ev_is_active (&pipe_w))
1241 {
1242 # if EV_USE_EVENTFD
1243 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1244 if (evfd < 0 && errno == EINVAL)
1245 evfd = eventfd (0, 0);
1246
1247 if (evfd >= 0)
1248 {
1249 evpipe [0] = -1;
1250 fd_intern (evfd); /* doing it twice doesn't hurt */
1251 ev_io_set (&pipe_w, evfd, EV_READ);
1252 }
1253 else
1254 # endif
1255 {
1256 while (pipe (evpipe))
1257 ev_syserr ("(libev) error creating signal/async pipe");
1258
1259 fd_intern (evpipe [0]);
1260 fd_intern (evpipe [1]);
1261 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1262 }
1263
1264 ev_io_start (EV_A_ &pipe_w);
1265 ev_unref (EV_A); /* watcher should not keep loop alive */
1266 }
1267 }
1268
1269 inline_size void
1270 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1271 {
1272 if (!*flag)
1273 {
1274 int old_errno = errno; /* save errno because write might clobber it */
1275 char dummy;
1276
1277 *flag = 1;
1278
1279 #if EV_USE_EVENTFD
1280 if (evfd >= 0)
1281 {
1282 uint64_t counter = 1;
1283 write (evfd, &counter, sizeof (uint64_t));
1284 }
1285 else
1286 #endif
1287 /* win32 people keep sending patches that change this write() to send() */
1288 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1289 /* so when you think this write should be a send instead, please find out */
1290 /* where your send() is from - it's definitely not the microsoft send, and */
1291 /* tell me. thank you. */
1292 write (evpipe [1], &dummy, 1);
1293
1294 errno = old_errno;
1295 }
1296 }
1297
1298 /* called whenever the libev signal pipe */
1299 /* got some events (signal, async) */
1300 static void
1301 pipecb (EV_P_ ev_io *iow, int revents)
1302 {
1303 int i;
1304
1305 #if EV_USE_EVENTFD
1306 if (evfd >= 0)
1307 {
1308 uint64_t counter;
1309 read (evfd, &counter, sizeof (uint64_t));
1310 }
1311 else
1312 #endif
1313 {
1314 char dummy;
1315 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1316 read (evpipe [0], &dummy, 1);
1317 }
1318
1319 if (sig_pending)
1320 {
1321 sig_pending = 0;
1322
1323 for (i = EV_NSIG - 1; i--; )
1324 if (expect_false (signals [i].pending))
1325 ev_feed_signal_event (EV_A_ i + 1);
1326 }
1327
1328 #if EV_ASYNC_ENABLE
1329 if (async_pending)
1330 {
1331 async_pending = 0;
1332
1333 for (i = asynccnt; i--; )
1334 if (asyncs [i]->sent)
1335 {
1336 asyncs [i]->sent = 0;
1337 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1338 }
1339 }
1340 #endif
1341 }
1342
1343 /*****************************************************************************/
1344
1345 static void
1346 ev_sighandler (int signum)
1347 {
1348 #if EV_MULTIPLICITY
1349 EV_P = signals [signum - 1].loop;
1350 #endif
1351
1352 #ifdef _WIN32
1353 signal (signum, ev_sighandler);
1354 #endif
1355
1356 signals [signum - 1].pending = 1;
1357 evpipe_write (EV_A_ &sig_pending);
1358 }
1359
1360 void noinline
1361 ev_feed_signal_event (EV_P_ int signum)
1362 {
1363 WL w;
1364
1365 if (expect_false (signum <= 0 || signum > EV_NSIG))
1366 return;
1367
1368 --signum;
1369
1370 #if EV_MULTIPLICITY
1371 /* it is permissible to try to feed a signal to the wrong loop */
1372 /* or, likely more useful, feeding a signal nobody is waiting for */
1373
1374 if (expect_false (signals [signum].loop != EV_A))
1375 return;
1376 #endif
1377
1378 signals [signum].pending = 0;
1379
1380 for (w = signals [signum].head; w; w = w->next)
1381 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1382 }
1383
1384 #if EV_USE_SIGNALFD
1385 static void
1386 sigfdcb (EV_P_ ev_io *iow, int revents)
1387 {
1388 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1389
1390 for (;;)
1391 {
1392 ssize_t res = read (sigfd, si, sizeof (si));
1393
1394 /* not ISO-C, as res might be -1, but works with SuS */
1395 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1396 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1397
1398 if (res < (ssize_t)sizeof (si))
1399 break;
1400 }
1401 }
1402 #endif
1403
1404 #endif
1405
1406 /*****************************************************************************/
1407
1408 #if EV_CHILD_ENABLE
1409 static WL childs [EV_PID_HASHSIZE];
1410
1411 static ev_signal childev;
1412
1413 #ifndef WIFCONTINUED
1414 # define WIFCONTINUED(status) 0
1415 #endif
1416
1417 /* handle a single child status event */
1418 inline_speed void
1419 child_reap (EV_P_ int chain, int pid, int status)
1420 {
1421 ev_child *w;
1422 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1423
1424 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1425 {
1426 if ((w->pid == pid || !w->pid)
1427 && (!traced || (w->flags & 1)))
1428 {
1429 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1430 w->rpid = pid;
1431 w->rstatus = status;
1432 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1433 }
1434 }
1435 }
1436
1437 #ifndef WCONTINUED
1438 # define WCONTINUED 0
1439 #endif
1440
1441 /* called on sigchld etc., calls waitpid */
1442 static void
1443 childcb (EV_P_ ev_signal *sw, int revents)
1444 {
1445 int pid, status;
1446
1447 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1448 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1449 if (!WCONTINUED
1450 || errno != EINVAL
1451 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1452 return;
1453
1454 /* make sure we are called again until all children have been reaped */
1455 /* we need to do it this way so that the callback gets called before we continue */
1456 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1457
1458 child_reap (EV_A_ pid, pid, status);
1459 if ((EV_PID_HASHSIZE) > 1)
1460 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1461 }
1462
1463 #endif
1464
1465 /*****************************************************************************/
1466
1467 #if EV_USE_PORT
1468 # include "ev_port.c"
1469 #endif
1470 #if EV_USE_KQUEUE
1471 # include "ev_kqueue.c"
1472 #endif
1473 #if EV_USE_EPOLL
1474 # include "ev_epoll.c"
1475 #endif
1476 #if EV_USE_POLL
1477 # include "ev_poll.c"
1478 #endif
1479 #if EV_USE_SELECT
1480 # include "ev_select.c"
1481 #endif
1482
1483 int
1484 ev_version_major (void)
1485 {
1486 return EV_VERSION_MAJOR;
1487 }
1488
1489 int
1490 ev_version_minor (void)
1491 {
1492 return EV_VERSION_MINOR;
1493 }
1494
1495 /* return true if we are running with elevated privileges and should ignore env variables */
1496 int inline_size
1497 enable_secure (void)
1498 {
1499 #ifdef _WIN32
1500 return 0;
1501 #else
1502 return getuid () != geteuid ()
1503 || getgid () != getegid ();
1504 #endif
1505 }
1506
1507 unsigned int
1508 ev_supported_backends (void)
1509 {
1510 unsigned int flags = 0;
1511
1512 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1513 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1514 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1515 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1516 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1517
1518 return flags;
1519 }
1520
1521 unsigned int
1522 ev_recommended_backends (void)
1523 {
1524 unsigned int flags = ev_supported_backends ();
1525
1526 #ifndef __NetBSD__
1527 /* kqueue is borked on everything but netbsd apparently */
1528 /* it usually doesn't work correctly on anything but sockets and pipes */
1529 flags &= ~EVBACKEND_KQUEUE;
1530 #endif
1531 #ifdef __APPLE__
1532 /* only select works correctly on that "unix-certified" platform */
1533 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1534 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1535 #endif
1536 #ifdef __FreeBSD__
1537 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1538 #endif
1539
1540 return flags;
1541 }
1542
1543 unsigned int
1544 ev_embeddable_backends (void)
1545 {
1546 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1547
1548 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1549 /* please fix it and tell me how to detect the fix */
1550 flags &= ~EVBACKEND_EPOLL;
1551
1552 return flags;
1553 }
1554
1555 unsigned int
1556 ev_backend (EV_P)
1557 {
1558 return backend;
1559 }
1560
1561 #if EV_FEATURE_API
1562 unsigned int
1563 ev_iteration (EV_P)
1564 {
1565 return loop_count;
1566 }
1567
1568 unsigned int
1569 ev_depth (EV_P)
1570 {
1571 return loop_depth;
1572 }
1573
1574 void
1575 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1576 {
1577 io_blocktime = interval;
1578 }
1579
1580 void
1581 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1582 {
1583 timeout_blocktime = interval;
1584 }
1585
1586 void
1587 ev_set_userdata (EV_P_ void *data)
1588 {
1589 userdata = data;
1590 }
1591
1592 void *
1593 ev_userdata (EV_P)
1594 {
1595 return userdata;
1596 }
1597
1598 void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1599 {
1600 invoke_cb = invoke_pending_cb;
1601 }
1602
1603 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1604 {
1605 release_cb = release;
1606 acquire_cb = acquire;
1607 }
1608 #endif
1609
1610 /* initialise a loop structure, must be zero-initialised */
1611 static void noinline
1612 loop_init (EV_P_ unsigned int flags)
1613 {
1614 if (!backend)
1615 {
1616 #if EV_USE_REALTIME
1617 if (!have_realtime)
1618 {
1619 struct timespec ts;
1620
1621 if (!clock_gettime (CLOCK_REALTIME, &ts))
1622 have_realtime = 1;
1623 }
1624 #endif
1625
1626 #if EV_USE_MONOTONIC
1627 if (!have_monotonic)
1628 {
1629 struct timespec ts;
1630
1631 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1632 have_monotonic = 1;
1633 }
1634 #endif
1635
1636 /* pid check not overridable via env */
1637 #ifndef _WIN32
1638 if (flags & EVFLAG_FORKCHECK)
1639 curpid = getpid ();
1640 #endif
1641
1642 if (!(flags & EVFLAG_NOENV)
1643 && !enable_secure ()
1644 && getenv ("LIBEV_FLAGS"))
1645 flags = atoi (getenv ("LIBEV_FLAGS"));
1646
1647 ev_rt_now = ev_time ();
1648 mn_now = get_clock ();
1649 now_floor = mn_now;
1650 rtmn_diff = ev_rt_now - mn_now;
1651 #if EV_FEATURE_API
1652 invoke_cb = ev_invoke_pending;
1653 #endif
1654
1655 io_blocktime = 0.;
1656 timeout_blocktime = 0.;
1657 backend = 0;
1658 backend_fd = -1;
1659 sig_pending = 0;
1660 #if EV_ASYNC_ENABLE
1661 async_pending = 0;
1662 #endif
1663 #if EV_USE_INOTIFY
1664 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1665 #endif
1666 #if EV_USE_SIGNALFD
1667 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1668 #endif
1669
1670 if (!(flags & 0x0000ffffU))
1671 flags |= ev_recommended_backends ();
1672
1673 #if EV_USE_PORT
1674 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1675 #endif
1676 #if EV_USE_KQUEUE
1677 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1678 #endif
1679 #if EV_USE_EPOLL
1680 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1681 #endif
1682 #if EV_USE_POLL
1683 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1684 #endif
1685 #if EV_USE_SELECT
1686 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1687 #endif
1688
1689 ev_prepare_init (&pending_w, pendingcb);
1690
1691 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1692 ev_init (&pipe_w, pipecb);
1693 ev_set_priority (&pipe_w, EV_MAXPRI);
1694 #endif
1695 }
1696 }
1697
1698 /* free up a loop structure */
1699 static void noinline
1700 loop_destroy (EV_P)
1701 {
1702 int i;
1703
1704 if (ev_is_active (&pipe_w))
1705 {
1706 /*ev_ref (EV_A);*/
1707 /*ev_io_stop (EV_A_ &pipe_w);*/
1708
1709 #if EV_USE_EVENTFD
1710 if (evfd >= 0)
1711 close (evfd);
1712 #endif
1713
1714 if (evpipe [0] >= 0)
1715 {
1716 EV_WIN32_CLOSE_FD (evpipe [0]);
1717 EV_WIN32_CLOSE_FD (evpipe [1]);
1718 }
1719 }
1720
1721 #if EV_USE_SIGNALFD
1722 if (ev_is_active (&sigfd_w))
1723 close (sigfd);
1724 #endif
1725
1726 #if EV_USE_INOTIFY
1727 if (fs_fd >= 0)
1728 close (fs_fd);
1729 #endif
1730
1731 if (backend_fd >= 0)
1732 close (backend_fd);
1733
1734 #if EV_USE_PORT
1735 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1736 #endif
1737 #if EV_USE_KQUEUE
1738 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1739 #endif
1740 #if EV_USE_EPOLL
1741 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1742 #endif
1743 #if EV_USE_POLL
1744 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1745 #endif
1746 #if EV_USE_SELECT
1747 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1748 #endif
1749
1750 for (i = NUMPRI; i--; )
1751 {
1752 array_free (pending, [i]);
1753 #if EV_IDLE_ENABLE
1754 array_free (idle, [i]);
1755 #endif
1756 }
1757
1758 ev_free (anfds); anfds = 0; anfdmax = 0;
1759
1760 /* have to use the microsoft-never-gets-it-right macro */
1761 array_free (rfeed, EMPTY);
1762 array_free (fdchange, EMPTY);
1763 array_free (timer, EMPTY);
1764 #if EV_PERIODIC_ENABLE
1765 array_free (periodic, EMPTY);
1766 #endif
1767 #if EV_FORK_ENABLE
1768 array_free (fork, EMPTY);
1769 #endif
1770 array_free (prepare, EMPTY);
1771 array_free (check, EMPTY);
1772 #if EV_ASYNC_ENABLE
1773 array_free (async, EMPTY);
1774 #endif
1775
1776 backend = 0;
1777 }
1778
1779 #if EV_USE_INOTIFY
1780 inline_size void infy_fork (EV_P);
1781 #endif
1782
1783 inline_size void
1784 loop_fork (EV_P)
1785 {
1786 #if EV_USE_PORT
1787 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1788 #endif
1789 #if EV_USE_KQUEUE
1790 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1791 #endif
1792 #if EV_USE_EPOLL
1793 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1794 #endif
1795 #if EV_USE_INOTIFY
1796 infy_fork (EV_A);
1797 #endif
1798
1799 if (ev_is_active (&pipe_w))
1800 {
1801 /* this "locks" the handlers against writing to the pipe */
1802 /* while we modify the fd vars */
1803 sig_pending = 1;
1804 #if EV_ASYNC_ENABLE
1805 async_pending = 1;
1806 #endif
1807
1808 ev_ref (EV_A);
1809 ev_io_stop (EV_A_ &pipe_w);
1810
1811 #if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 close (evfd);
1814 #endif
1815
1816 if (evpipe [0] >= 0)
1817 {
1818 EV_WIN32_CLOSE_FD (evpipe [0]);
1819 EV_WIN32_CLOSE_FD (evpipe [1]);
1820 }
1821
1822 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1823 evpipe_init (EV_A);
1824 /* now iterate over everything, in case we missed something */
1825 pipecb (EV_A_ &pipe_w, EV_READ);
1826 #endif
1827 }
1828
1829 postfork = 0;
1830 }
1831
1832 #if EV_MULTIPLICITY
1833
1834 struct ev_loop *
1835 ev_loop_new (unsigned int flags)
1836 {
1837 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1838
1839 memset (EV_A, 0, sizeof (struct ev_loop));
1840 loop_init (EV_A_ flags);
1841
1842 if (ev_backend (EV_A))
1843 return EV_A;
1844
1845 return 0;
1846 }
1847
1848 void
1849 ev_loop_destroy (EV_P)
1850 {
1851 loop_destroy (EV_A);
1852 ev_free (loop);
1853 }
1854
1855 void
1856 ev_loop_fork (EV_P)
1857 {
1858 postfork = 1; /* must be in line with ev_default_fork */
1859 }
1860 #endif /* multiplicity */
1861
1862 #if EV_VERIFY
1863 static void noinline
1864 verify_watcher (EV_P_ W w)
1865 {
1866 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1867
1868 if (w->pending)
1869 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1870 }
1871
1872 static void noinline
1873 verify_heap (EV_P_ ANHE *heap, int N)
1874 {
1875 int i;
1876
1877 for (i = HEAP0; i < N + HEAP0; ++i)
1878 {
1879 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1880 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1881 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1882
1883 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1884 }
1885 }
1886
1887 static void noinline
1888 array_verify (EV_P_ W *ws, int cnt)
1889 {
1890 while (cnt--)
1891 {
1892 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1893 verify_watcher (EV_A_ ws [cnt]);
1894 }
1895 }
1896 #endif
1897
1898 #if EV_FEATURE_API
1899 void
1900 ev_verify (EV_P)
1901 {
1902 #if EV_VERIFY
1903 int i;
1904 WL w;
1905
1906 assert (activecnt >= -1);
1907
1908 assert (fdchangemax >= fdchangecnt);
1909 for (i = 0; i < fdchangecnt; ++i)
1910 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1911
1912 assert (anfdmax >= 0);
1913 for (i = 0; i < anfdmax; ++i)
1914 for (w = anfds [i].head; w; w = w->next)
1915 {
1916 verify_watcher (EV_A_ (W)w);
1917 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1918 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1919 }
1920
1921 assert (timermax >= timercnt);
1922 verify_heap (EV_A_ timers, timercnt);
1923
1924 #if EV_PERIODIC_ENABLE
1925 assert (periodicmax >= periodiccnt);
1926 verify_heap (EV_A_ periodics, periodiccnt);
1927 #endif
1928
1929 for (i = NUMPRI; i--; )
1930 {
1931 assert (pendingmax [i] >= pendingcnt [i]);
1932 #if EV_IDLE_ENABLE
1933 assert (idleall >= 0);
1934 assert (idlemax [i] >= idlecnt [i]);
1935 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1936 #endif
1937 }
1938
1939 #if EV_FORK_ENABLE
1940 assert (forkmax >= forkcnt);
1941 array_verify (EV_A_ (W *)forks, forkcnt);
1942 #endif
1943
1944 #if EV_ASYNC_ENABLE
1945 assert (asyncmax >= asynccnt);
1946 array_verify (EV_A_ (W *)asyncs, asynccnt);
1947 #endif
1948
1949 #if EV_PREPARE_ENABLE
1950 assert (preparemax >= preparecnt);
1951 array_verify (EV_A_ (W *)prepares, preparecnt);
1952 #endif
1953
1954 #if EV_CHECK_ENABLE
1955 assert (checkmax >= checkcnt);
1956 array_verify (EV_A_ (W *)checks, checkcnt);
1957 #endif
1958
1959 # if 0
1960 #if EV_CHILD_ENABLE
1961 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1962 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1963 #endif
1964 # endif
1965 #endif
1966 }
1967 #endif
1968
1969 #if EV_MULTIPLICITY
1970 struct ev_loop *
1971 ev_default_loop_init (unsigned int flags)
1972 #else
1973 int
1974 ev_default_loop (unsigned int flags)
1975 #endif
1976 {
1977 if (!ev_default_loop_ptr)
1978 {
1979 #if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr = &default_loop_struct;
1981 #else
1982 ev_default_loop_ptr = 1;
1983 #endif
1984
1985 loop_init (EV_A_ flags);
1986
1987 if (ev_backend (EV_A))
1988 {
1989 #if EV_CHILD_ENABLE
1990 ev_signal_init (&childev, childcb, SIGCHLD);
1991 ev_set_priority (&childev, EV_MAXPRI);
1992 ev_signal_start (EV_A_ &childev);
1993 ev_unref (EV_A); /* child watcher should not keep loop alive */
1994 #endif
1995 }
1996 else
1997 ev_default_loop_ptr = 0;
1998 }
1999
2000 return ev_default_loop_ptr;
2001 }
2002
2003 void
2004 ev_default_destroy (void)
2005 {
2006 #if EV_MULTIPLICITY
2007 EV_P = ev_default_loop_ptr;
2008 #endif
2009
2010 ev_default_loop_ptr = 0;
2011
2012 #if EV_CHILD_ENABLE
2013 ev_ref (EV_A); /* child watcher */
2014 ev_signal_stop (EV_A_ &childev);
2015 #endif
2016
2017 loop_destroy (EV_A);
2018 }
2019
2020 void
2021 ev_default_fork (void)
2022 {
2023 #if EV_MULTIPLICITY
2024 EV_P = ev_default_loop_ptr;
2025 #endif
2026
2027 postfork = 1; /* must be in line with ev_loop_fork */
2028 }
2029
2030 /*****************************************************************************/
2031
2032 void
2033 ev_invoke (EV_P_ void *w, int revents)
2034 {
2035 EV_CB_INVOKE ((W)w, revents);
2036 }
2037
2038 unsigned int
2039 ev_pending_count (EV_P)
2040 {
2041 int pri;
2042 unsigned int count = 0;
2043
2044 for (pri = NUMPRI; pri--; )
2045 count += pendingcnt [pri];
2046
2047 return count;
2048 }
2049
2050 void noinline
2051 ev_invoke_pending (EV_P)
2052 {
2053 int pri;
2054
2055 for (pri = NUMPRI; pri--; )
2056 while (pendingcnt [pri])
2057 {
2058 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2059
2060 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2061 /* ^ this is no longer true, as pending_w could be here */
2062
2063 p->w->pending = 0;
2064 EV_CB_INVOKE (p->w, p->events);
2065 EV_FREQUENT_CHECK;
2066 }
2067 }
2068
2069 #if EV_IDLE_ENABLE
2070 /* make idle watchers pending. this handles the "call-idle */
2071 /* only when higher priorities are idle" logic */
2072 inline_size void
2073 idle_reify (EV_P)
2074 {
2075 if (expect_false (idleall))
2076 {
2077 int pri;
2078
2079 for (pri = NUMPRI; pri--; )
2080 {
2081 if (pendingcnt [pri])
2082 break;
2083
2084 if (idlecnt [pri])
2085 {
2086 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2087 break;
2088 }
2089 }
2090 }
2091 }
2092 #endif
2093
2094 /* make timers pending */
2095 inline_size void
2096 timers_reify (EV_P)
2097 {
2098 EV_FREQUENT_CHECK;
2099
2100 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2101 {
2102 do
2103 {
2104 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2105
2106 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2107
2108 /* first reschedule or stop timer */
2109 if (w->repeat)
2110 {
2111 ev_at (w) += w->repeat;
2112 if (ev_at (w) < mn_now)
2113 ev_at (w) = mn_now;
2114
2115 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2116
2117 ANHE_at_cache (timers [HEAP0]);
2118 downheap (timers, timercnt, HEAP0);
2119 }
2120 else
2121 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2122
2123 EV_FREQUENT_CHECK;
2124 feed_reverse (EV_A_ (W)w);
2125 }
2126 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2127
2128 feed_reverse_done (EV_A_ EV_TIMER);
2129 }
2130 }
2131
2132 #if EV_PERIODIC_ENABLE
2133 /* make periodics pending */
2134 inline_size void
2135 periodics_reify (EV_P)
2136 {
2137 EV_FREQUENT_CHECK;
2138
2139 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2140 {
2141 int feed_count = 0;
2142
2143 do
2144 {
2145 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2146
2147 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2148
2149 /* first reschedule or stop timer */
2150 if (w->reschedule_cb)
2151 {
2152 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2153
2154 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2155
2156 ANHE_at_cache (periodics [HEAP0]);
2157 downheap (periodics, periodiccnt, HEAP0);
2158 }
2159 else if (w->interval)
2160 {
2161 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2162 /* if next trigger time is not sufficiently in the future, put it there */
2163 /* this might happen because of floating point inexactness */
2164 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2165 {
2166 ev_at (w) += w->interval;
2167
2168 /* if interval is unreasonably low we might still have a time in the past */
2169 /* so correct this. this will make the periodic very inexact, but the user */
2170 /* has effectively asked to get triggered more often than possible */
2171 if (ev_at (w) < ev_rt_now)
2172 ev_at (w) = ev_rt_now;
2173 }
2174
2175 ANHE_at_cache (periodics [HEAP0]);
2176 downheap (periodics, periodiccnt, HEAP0);
2177 }
2178 else
2179 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2180
2181 EV_FREQUENT_CHECK;
2182 feed_reverse (EV_A_ (W)w);
2183 }
2184 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2185
2186 feed_reverse_done (EV_A_ EV_PERIODIC);
2187 }
2188 }
2189
2190 /* simply recalculate all periodics */
2191 /* TODO: maybe ensure that at least one event happens when jumping forward? */
2192 static void noinline
2193 periodics_reschedule (EV_P)
2194 {
2195 int i;
2196
2197 /* adjust periodics after time jump */
2198 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2199 {
2200 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2201
2202 if (w->reschedule_cb)
2203 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2204 else if (w->interval)
2205 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2206
2207 ANHE_at_cache (periodics [i]);
2208 }
2209
2210 reheap (periodics, periodiccnt);
2211 }
2212 #endif
2213
2214 /* adjust all timers by a given offset */
2215 static void noinline
2216 timers_reschedule (EV_P_ ev_tstamp adjust)
2217 {
2218 int i;
2219
2220 for (i = 0; i < timercnt; ++i)
2221 {
2222 ANHE *he = timers + i + HEAP0;
2223 ANHE_w (*he)->at += adjust;
2224 ANHE_at_cache (*he);
2225 }
2226 }
2227
2228 /* fetch new monotonic and realtime times from the kernel */
2229 /* also detect if there was a timejump, and act accordingly */
2230 inline_speed void
2231 time_update (EV_P_ ev_tstamp max_block)
2232 {
2233 #if EV_USE_MONOTONIC
2234 if (expect_true (have_monotonic))
2235 {
2236 int i;
2237 ev_tstamp odiff = rtmn_diff;
2238
2239 mn_now = get_clock ();
2240
2241 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2242 /* interpolate in the meantime */
2243 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2244 {
2245 ev_rt_now = rtmn_diff + mn_now;
2246 return;
2247 }
2248
2249 now_floor = mn_now;
2250 ev_rt_now = ev_time ();
2251
2252 /* loop a few times, before making important decisions.
2253 * on the choice of "4": one iteration isn't enough,
2254 * in case we get preempted during the calls to
2255 * ev_time and get_clock. a second call is almost guaranteed
2256 * to succeed in that case, though. and looping a few more times
2257 * doesn't hurt either as we only do this on time-jumps or
2258 * in the unlikely event of having been preempted here.
2259 */
2260 for (i = 4; --i; )
2261 {
2262 rtmn_diff = ev_rt_now - mn_now;
2263
2264 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2265 return; /* all is well */
2266
2267 ev_rt_now = ev_time ();
2268 mn_now = get_clock ();
2269 now_floor = mn_now;
2270 }
2271
2272 /* no timer adjustment, as the monotonic clock doesn't jump */
2273 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2274 # if EV_PERIODIC_ENABLE
2275 periodics_reschedule (EV_A);
2276 # endif
2277 }
2278 else
2279 #endif
2280 {
2281 ev_rt_now = ev_time ();
2282
2283 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2284 {
2285 /* adjust timers. this is easy, as the offset is the same for all of them */
2286 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2287 #if EV_PERIODIC_ENABLE
2288 periodics_reschedule (EV_A);
2289 #endif
2290 }
2291
2292 mn_now = ev_rt_now;
2293 }
2294 }
2295
2296 void
2297 ev_loop (EV_P_ int flags)
2298 {
2299 #if EV_FEATURE_API
2300 ++loop_depth;
2301 #endif
2302
2303 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2304
2305 loop_done = EVUNLOOP_CANCEL;
2306
2307 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2308
2309 do
2310 {
2311 #if EV_VERIFY >= 2
2312 ev_verify (EV_A);
2313 #endif
2314
2315 #ifndef _WIN32
2316 if (expect_false (curpid)) /* penalise the forking check even more */
2317 if (expect_false (getpid () != curpid))
2318 {
2319 curpid = getpid ();
2320 postfork = 1;
2321 }
2322 #endif
2323
2324 #if EV_FORK_ENABLE
2325 /* we might have forked, so queue fork handlers */
2326 if (expect_false (postfork))
2327 if (forkcnt)
2328 {
2329 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2330 EV_INVOKE_PENDING;
2331 }
2332 #endif
2333
2334 #if EV_PREPARE_ENABLE
2335 /* queue prepare watchers (and execute them) */
2336 if (expect_false (preparecnt))
2337 {
2338 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2339 EV_INVOKE_PENDING;
2340 }
2341 #endif
2342
2343 if (expect_false (loop_done))
2344 break;
2345
2346 /* we might have forked, so reify kernel state if necessary */
2347 if (expect_false (postfork))
2348 loop_fork (EV_A);
2349
2350 /* update fd-related kernel structures */
2351 fd_reify (EV_A);
2352
2353 /* calculate blocking time */
2354 {
2355 ev_tstamp waittime = 0.;
2356 ev_tstamp sleeptime = 0.;
2357
2358 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2359 {
2360 /* remember old timestamp for io_blocktime calculation */
2361 ev_tstamp prev_mn_now = mn_now;
2362
2363 /* update time to cancel out callback processing overhead */
2364 time_update (EV_A_ 1e100);
2365
2366 waittime = MAX_BLOCKTIME;
2367
2368 if (timercnt)
2369 {
2370 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2371 if (waittime > to) waittime = to;
2372 }
2373
2374 #if EV_PERIODIC_ENABLE
2375 if (periodiccnt)
2376 {
2377 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2378 if (waittime > to) waittime = to;
2379 }
2380 #endif
2381
2382 /* don't let timeouts decrease the waittime below timeout_blocktime */
2383 if (expect_false (waittime < timeout_blocktime))
2384 waittime = timeout_blocktime;
2385
2386 /* extra check because io_blocktime is commonly 0 */
2387 if (expect_false (io_blocktime))
2388 {
2389 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2390
2391 if (sleeptime > waittime - backend_fudge)
2392 sleeptime = waittime - backend_fudge;
2393
2394 if (expect_true (sleeptime > 0.))
2395 {
2396 ev_sleep (sleeptime);
2397 waittime -= sleeptime;
2398 }
2399 }
2400 }
2401
2402 #if EV_FEATURE_API
2403 ++loop_count;
2404 #endif
2405 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2406 backend_poll (EV_A_ waittime);
2407 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2408
2409 /* update ev_rt_now, do magic */
2410 time_update (EV_A_ waittime + sleeptime);
2411 }
2412
2413 /* queue pending timers and reschedule them */
2414 timers_reify (EV_A); /* relative timers called last */
2415 #if EV_PERIODIC_ENABLE
2416 periodics_reify (EV_A); /* absolute timers called first */
2417 #endif
2418
2419 #if EV_IDLE_ENABLE
2420 /* queue idle watchers unless other events are pending */
2421 idle_reify (EV_A);
2422 #endif
2423
2424 #if EV_CHECK_ENABLE
2425 /* queue check watchers, to be executed first */
2426 if (expect_false (checkcnt))
2427 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2428 #endif
2429
2430 EV_INVOKE_PENDING;
2431 }
2432 while (expect_true (
2433 activecnt
2434 && !loop_done
2435 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2436 ));
2437
2438 if (loop_done == EVUNLOOP_ONE)
2439 loop_done = EVUNLOOP_CANCEL;
2440
2441 #if EV_FEATURE_API
2442 --loop_depth;
2443 #endif
2444 }
2445
2446 void
2447 ev_unloop (EV_P_ int how)
2448 {
2449 loop_done = how;
2450 }
2451
2452 void
2453 ev_ref (EV_P)
2454 {
2455 ++activecnt;
2456 }
2457
2458 void
2459 ev_unref (EV_P)
2460 {
2461 --activecnt;
2462 }
2463
2464 void
2465 ev_now_update (EV_P)
2466 {
2467 time_update (EV_A_ 1e100);
2468 }
2469
2470 void
2471 ev_suspend (EV_P)
2472 {
2473 ev_now_update (EV_A);
2474 }
2475
2476 void
2477 ev_resume (EV_P)
2478 {
2479 ev_tstamp mn_prev = mn_now;
2480
2481 ev_now_update (EV_A);
2482 timers_reschedule (EV_A_ mn_now - mn_prev);
2483 #if EV_PERIODIC_ENABLE
2484 /* TODO: really do this? */
2485 periodics_reschedule (EV_A);
2486 #endif
2487 }
2488
2489 /*****************************************************************************/
2490 /* singly-linked list management, used when the expected list length is short */
2491
2492 inline_size void
2493 wlist_add (WL *head, WL elem)
2494 {
2495 elem->next = *head;
2496 *head = elem;
2497 }
2498
2499 inline_size void
2500 wlist_del (WL *head, WL elem)
2501 {
2502 while (*head)
2503 {
2504 if (expect_true (*head == elem))
2505 {
2506 *head = elem->next;
2507 break;
2508 }
2509
2510 head = &(*head)->next;
2511 }
2512 }
2513
2514 /* internal, faster, version of ev_clear_pending */
2515 inline_speed void
2516 clear_pending (EV_P_ W w)
2517 {
2518 if (w->pending)
2519 {
2520 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2521 w->pending = 0;
2522 }
2523 }
2524
2525 int
2526 ev_clear_pending (EV_P_ void *w)
2527 {
2528 W w_ = (W)w;
2529 int pending = w_->pending;
2530
2531 if (expect_true (pending))
2532 {
2533 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2534 p->w = (W)&pending_w;
2535 w_->pending = 0;
2536 return p->events;
2537 }
2538 else
2539 return 0;
2540 }
2541
2542 inline_size void
2543 pri_adjust (EV_P_ W w)
2544 {
2545 int pri = ev_priority (w);
2546 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2547 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2548 ev_set_priority (w, pri);
2549 }
2550
2551 inline_speed void
2552 ev_start (EV_P_ W w, int active)
2553 {
2554 pri_adjust (EV_A_ w);
2555 w->active = active;
2556 ev_ref (EV_A);
2557 }
2558
2559 inline_size void
2560 ev_stop (EV_P_ W w)
2561 {
2562 ev_unref (EV_A);
2563 w->active = 0;
2564 }
2565
2566 /*****************************************************************************/
2567
2568 void noinline
2569 ev_io_start (EV_P_ ev_io *w)
2570 {
2571 int fd = w->fd;
2572
2573 if (expect_false (ev_is_active (w)))
2574 return;
2575
2576 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2577 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2578
2579 EV_FREQUENT_CHECK;
2580
2581 ev_start (EV_A_ (W)w, 1);
2582 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2583 wlist_add (&anfds[fd].head, (WL)w);
2584
2585 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2586 w->events &= ~EV__IOFDSET;
2587
2588 EV_FREQUENT_CHECK;
2589 }
2590
2591 void noinline
2592 ev_io_stop (EV_P_ ev_io *w)
2593 {
2594 clear_pending (EV_A_ (W)w);
2595 if (expect_false (!ev_is_active (w)))
2596 return;
2597
2598 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2599
2600 EV_FREQUENT_CHECK;
2601
2602 wlist_del (&anfds[w->fd].head, (WL)w);
2603 ev_stop (EV_A_ (W)w);
2604
2605 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2606
2607 EV_FREQUENT_CHECK;
2608 }
2609
2610 void noinline
2611 ev_timer_start (EV_P_ ev_timer *w)
2612 {
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
2616 ev_at (w) += mn_now;
2617
2618 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2619
2620 EV_FREQUENT_CHECK;
2621
2622 ++timercnt;
2623 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2624 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2625 ANHE_w (timers [ev_active (w)]) = (WT)w;
2626 ANHE_at_cache (timers [ev_active (w)]);
2627 upheap (timers, ev_active (w));
2628
2629 EV_FREQUENT_CHECK;
2630
2631 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2632 }
2633
2634 void noinline
2635 ev_timer_stop (EV_P_ ev_timer *w)
2636 {
2637 clear_pending (EV_A_ (W)w);
2638 if (expect_false (!ev_is_active (w)))
2639 return;
2640
2641 EV_FREQUENT_CHECK;
2642
2643 {
2644 int active = ev_active (w);
2645
2646 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2647
2648 --timercnt;
2649
2650 if (expect_true (active < timercnt + HEAP0))
2651 {
2652 timers [active] = timers [timercnt + HEAP0];
2653 adjustheap (timers, timercnt, active);
2654 }
2655 }
2656
2657 ev_at (w) -= mn_now;
2658
2659 ev_stop (EV_A_ (W)w);
2660
2661 EV_FREQUENT_CHECK;
2662 }
2663
2664 void noinline
2665 ev_timer_again (EV_P_ ev_timer *w)
2666 {
2667 EV_FREQUENT_CHECK;
2668
2669 if (ev_is_active (w))
2670 {
2671 if (w->repeat)
2672 {
2673 ev_at (w) = mn_now + w->repeat;
2674 ANHE_at_cache (timers [ev_active (w)]);
2675 adjustheap (timers, timercnt, ev_active (w));
2676 }
2677 else
2678 ev_timer_stop (EV_A_ w);
2679 }
2680 else if (w->repeat)
2681 {
2682 ev_at (w) = w->repeat;
2683 ev_timer_start (EV_A_ w);
2684 }
2685
2686 EV_FREQUENT_CHECK;
2687 }
2688
2689 ev_tstamp
2690 ev_timer_remaining (EV_P_ ev_timer *w)
2691 {
2692 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2693 }
2694
2695 #if EV_PERIODIC_ENABLE
2696 void noinline
2697 ev_periodic_start (EV_P_ ev_periodic *w)
2698 {
2699 if (expect_false (ev_is_active (w)))
2700 return;
2701
2702 if (w->reschedule_cb)
2703 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2704 else if (w->interval)
2705 {
2706 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2707 /* this formula differs from the one in periodic_reify because we do not always round up */
2708 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2709 }
2710 else
2711 ev_at (w) = w->offset;
2712
2713 EV_FREQUENT_CHECK;
2714
2715 ++periodiccnt;
2716 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2717 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2718 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2719 ANHE_at_cache (periodics [ev_active (w)]);
2720 upheap (periodics, ev_active (w));
2721
2722 EV_FREQUENT_CHECK;
2723
2724 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2725 }
2726
2727 void noinline
2728 ev_periodic_stop (EV_P_ ev_periodic *w)
2729 {
2730 clear_pending (EV_A_ (W)w);
2731 if (expect_false (!ev_is_active (w)))
2732 return;
2733
2734 EV_FREQUENT_CHECK;
2735
2736 {
2737 int active = ev_active (w);
2738
2739 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2740
2741 --periodiccnt;
2742
2743 if (expect_true (active < periodiccnt + HEAP0))
2744 {
2745 periodics [active] = periodics [periodiccnt + HEAP0];
2746 adjustheap (periodics, periodiccnt, active);
2747 }
2748 }
2749
2750 ev_stop (EV_A_ (W)w);
2751
2752 EV_FREQUENT_CHECK;
2753 }
2754
2755 void noinline
2756 ev_periodic_again (EV_P_ ev_periodic *w)
2757 {
2758 /* TODO: use adjustheap and recalculation */
2759 ev_periodic_stop (EV_A_ w);
2760 ev_periodic_start (EV_A_ w);
2761 }
2762 #endif
2763
2764 #ifndef SA_RESTART
2765 # define SA_RESTART 0
2766 #endif
2767
2768 #if EV_SIGNAL_ENABLE
2769
2770 void noinline
2771 ev_signal_start (EV_P_ ev_signal *w)
2772 {
2773 if (expect_false (ev_is_active (w)))
2774 return;
2775
2776 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2777
2778 #if EV_MULTIPLICITY
2779 assert (("libev: a signal must not be attached to two different loops",
2780 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2781
2782 signals [w->signum - 1].loop = EV_A;
2783 #endif
2784
2785 EV_FREQUENT_CHECK;
2786
2787 #if EV_USE_SIGNALFD
2788 if (sigfd == -2)
2789 {
2790 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2791 if (sigfd < 0 && errno == EINVAL)
2792 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2793
2794 if (sigfd >= 0)
2795 {
2796 fd_intern (sigfd); /* doing it twice will not hurt */
2797
2798 sigemptyset (&sigfd_set);
2799
2800 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2801 ev_set_priority (&sigfd_w, EV_MAXPRI);
2802 ev_io_start (EV_A_ &sigfd_w);
2803 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2804 }
2805 }
2806
2807 if (sigfd >= 0)
2808 {
2809 /* TODO: check .head */
2810 sigaddset (&sigfd_set, w->signum);
2811 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2812
2813 signalfd (sigfd, &sigfd_set, 0);
2814 }
2815 #endif
2816
2817 ev_start (EV_A_ (W)w, 1);
2818 wlist_add (&signals [w->signum - 1].head, (WL)w);
2819
2820 if (!((WL)w)->next)
2821 # if EV_USE_SIGNALFD
2822 if (sigfd < 0) /*TODO*/
2823 # endif
2824 {
2825 # ifdef _WIN32
2826 evpipe_init (EV_A);
2827
2828 signal (w->signum, ev_sighandler);
2829 # else
2830 struct sigaction sa;
2831
2832 evpipe_init (EV_A);
2833
2834 sa.sa_handler = ev_sighandler;
2835 sigfillset (&sa.sa_mask);
2836 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2837 sigaction (w->signum, &sa, 0);
2838
2839 sigemptyset (&sa.sa_mask);
2840 sigaddset (&sa.sa_mask, w->signum);
2841 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2842 #endif
2843 }
2844
2845 EV_FREQUENT_CHECK;
2846 }
2847
2848 void noinline
2849 ev_signal_stop (EV_P_ ev_signal *w)
2850 {
2851 clear_pending (EV_A_ (W)w);
2852 if (expect_false (!ev_is_active (w)))
2853 return;
2854
2855 EV_FREQUENT_CHECK;
2856
2857 wlist_del (&signals [w->signum - 1].head, (WL)w);
2858 ev_stop (EV_A_ (W)w);
2859
2860 if (!signals [w->signum - 1].head)
2861 {
2862 #if EV_MULTIPLICITY
2863 signals [w->signum - 1].loop = 0; /* unattach from signal */
2864 #endif
2865 #if EV_USE_SIGNALFD
2866 if (sigfd >= 0)
2867 {
2868 sigset_t ss;
2869
2870 sigemptyset (&ss);
2871 sigaddset (&ss, w->signum);
2872 sigdelset (&sigfd_set, w->signum);
2873
2874 signalfd (sigfd, &sigfd_set, 0);
2875 sigprocmask (SIG_UNBLOCK, &ss, 0);
2876 }
2877 else
2878 #endif
2879 signal (w->signum, SIG_DFL);
2880 }
2881
2882 EV_FREQUENT_CHECK;
2883 }
2884
2885 #endif
2886
2887 #if EV_CHILD_ENABLE
2888
2889 void
2890 ev_child_start (EV_P_ ev_child *w)
2891 {
2892 #if EV_MULTIPLICITY
2893 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2894 #endif
2895 if (expect_false (ev_is_active (w)))
2896 return;
2897
2898 EV_FREQUENT_CHECK;
2899
2900 ev_start (EV_A_ (W)w, 1);
2901 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2902
2903 EV_FREQUENT_CHECK;
2904 }
2905
2906 void
2907 ev_child_stop (EV_P_ ev_child *w)
2908 {
2909 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w)))
2911 return;
2912
2913 EV_FREQUENT_CHECK;
2914
2915 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2916 ev_stop (EV_A_ (W)w);
2917
2918 EV_FREQUENT_CHECK;
2919 }
2920
2921 #endif
2922
2923 #if EV_STAT_ENABLE
2924
2925 # ifdef _WIN32
2926 # undef lstat
2927 # define lstat(a,b) _stati64 (a,b)
2928 # endif
2929
2930 #define DEF_STAT_INTERVAL 5.0074891
2931 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2932 #define MIN_STAT_INTERVAL 0.1074891
2933
2934 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2935
2936 #if EV_USE_INOTIFY
2937
2938 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2939 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2940
2941 static void noinline
2942 infy_add (EV_P_ ev_stat *w)
2943 {
2944 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);
2945
2946 if (w->wd >= 0)
2947 {
2948 struct statfs sfs;
2949
2950 /* now local changes will be tracked by inotify, but remote changes won't */
2951 /* unless the filesystem is known to be local, we therefore still poll */
2952 /* also do poll on <2.6.25, but with normal frequency */
2953
2954 if (!fs_2625)
2955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2956 else if (!statfs (w->path, &sfs)
2957 && (sfs.f_type == 0x1373 /* devfs */
2958 || sfs.f_type == 0xEF53 /* ext2/3 */
2959 || sfs.f_type == 0x3153464a /* jfs */
2960 || sfs.f_type == 0x52654973 /* reiser3 */
2961 || sfs.f_type == 0x01021994 /* tempfs */
2962 || sfs.f_type == 0x58465342 /* xfs */))
2963 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2964 else
2965 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2966 }
2967 else
2968 {
2969 /* can't use inotify, continue to stat */
2970 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2971
2972 /* if path is not there, monitor some parent directory for speedup hints */
2973 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2974 /* but an efficiency issue only */
2975 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2976 {
2977 char path [4096];
2978 strcpy (path, w->path);
2979
2980 do
2981 {
2982 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2983 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2984
2985 char *pend = strrchr (path, '/');
2986
2987 if (!pend || pend == path)
2988 break;
2989
2990 *pend = 0;
2991 w->wd = inotify_add_watch (fs_fd, path, mask);
2992 }
2993 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2994 }
2995 }
2996
2997 if (w->wd >= 0)
2998 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2999
3000 /* now re-arm timer, if required */
3001 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3002 ev_timer_again (EV_A_ &w->timer);
3003 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3004 }
3005
3006 static void noinline
3007 infy_del (EV_P_ ev_stat *w)
3008 {
3009 int slot;
3010 int wd = w->wd;
3011
3012 if (wd < 0)
3013 return;
3014
3015 w->wd = -2;
3016 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3017 wlist_del (&fs_hash [slot].head, (WL)w);
3018
3019 /* remove this watcher, if others are watching it, they will rearm */
3020 inotify_rm_watch (fs_fd, wd);
3021 }
3022
3023 static void noinline
3024 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3025 {
3026 if (slot < 0)
3027 /* overflow, need to check for all hash slots */
3028 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3029 infy_wd (EV_A_ slot, wd, ev);
3030 else
3031 {
3032 WL w_;
3033
3034 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3035 {
3036 ev_stat *w = (ev_stat *)w_;
3037 w_ = w_->next; /* lets us remove this watcher and all before it */
3038
3039 if (w->wd == wd || wd == -1)
3040 {
3041 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3042 {
3043 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3044 w->wd = -1;
3045 infy_add (EV_A_ w); /* re-add, no matter what */
3046 }
3047
3048 stat_timer_cb (EV_A_ &w->timer, 0);
3049 }
3050 }
3051 }
3052 }
3053
3054 static void
3055 infy_cb (EV_P_ ev_io *w, int revents)
3056 {
3057 char buf [EV_INOTIFY_BUFSIZE];
3058 int ofs;
3059 int len = read (fs_fd, buf, sizeof (buf));
3060
3061 for (ofs = 0; ofs < len; )
3062 {
3063 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3064 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3065 ofs += sizeof (struct inotify_event) + ev->len;
3066 }
3067 }
3068
3069 inline_size unsigned int
3070 ev_linux_version (void)
3071 {
3072 struct utsname buf;
3073 unsigned int v;
3074 int i;
3075 char *p = buf.release;
3076
3077 if (uname (&buf))
3078 return 0;
3079
3080 for (i = 3+1; --i; )
3081 {
3082 unsigned int c = 0;
3083
3084 for (;;)
3085 {
3086 if (*p >= '0' && *p <= '9')
3087 c = c * 10 + *p++ - '0';
3088 else
3089 {
3090 p += *p == '.';
3091 break;
3092 }
3093 }
3094
3095 v = (v << 8) | c;
3096 }
3097
3098 return v;
3099 }
3100
3101 inline_size void
3102 ev_check_2625 (EV_P)
3103 {
3104 /* kernels < 2.6.25 are borked
3105 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3106 */
3107 if (ev_linux_version () < 0x020619)
3108 return;
3109
3110 fs_2625 = 1;
3111 }
3112
3113 inline_size int
3114 infy_newfd (void)
3115 {
3116 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3117 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3118 if (fd >= 0)
3119 return fd;
3120 #endif
3121 return inotify_init ();
3122 }
3123
3124 inline_size void
3125 infy_init (EV_P)
3126 {
3127 if (fs_fd != -2)
3128 return;
3129
3130 fs_fd = -1;
3131
3132 ev_check_2625 (EV_A);
3133
3134 fs_fd = infy_newfd ();
3135
3136 if (fs_fd >= 0)
3137 {
3138 fd_intern (fs_fd);
3139 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3140 ev_set_priority (&fs_w, EV_MAXPRI);
3141 ev_io_start (EV_A_ &fs_w);
3142 ev_unref (EV_A);
3143 }
3144 }
3145
3146 inline_size void
3147 infy_fork (EV_P)
3148 {
3149 int slot;
3150
3151 if (fs_fd < 0)
3152 return;
3153
3154 ev_ref (EV_A);
3155 ev_io_stop (EV_A_ &fs_w);
3156 close (fs_fd);
3157 fs_fd = infy_newfd ();
3158
3159 if (fs_fd >= 0)
3160 {
3161 fd_intern (fs_fd);
3162 ev_io_set (&fs_w, fs_fd, EV_READ);
3163 ev_io_start (EV_A_ &fs_w);
3164 ev_unref (EV_A);
3165 }
3166
3167 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3168 {
3169 WL w_ = fs_hash [slot].head;
3170 fs_hash [slot].head = 0;
3171
3172 while (w_)
3173 {
3174 ev_stat *w = (ev_stat *)w_;
3175 w_ = w_->next; /* lets us add this watcher */
3176
3177 w->wd = -1;
3178
3179 if (fs_fd >= 0)
3180 infy_add (EV_A_ w); /* re-add, no matter what */
3181 else
3182 {
3183 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3184 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3185 ev_timer_again (EV_A_ &w->timer);
3186 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3187 }
3188 }
3189 }
3190 }
3191
3192 #endif
3193
3194 #ifdef _WIN32
3195 # define EV_LSTAT(p,b) _stati64 (p, b)
3196 #else
3197 # define EV_LSTAT(p,b) lstat (p, b)
3198 #endif
3199
3200 void
3201 ev_stat_stat (EV_P_ ev_stat *w)
3202 {
3203 if (lstat (w->path, &w->attr) < 0)
3204 w->attr.st_nlink = 0;
3205 else if (!w->attr.st_nlink)
3206 w->attr.st_nlink = 1;
3207 }
3208
3209 static void noinline
3210 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3211 {
3212 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3213
3214 ev_statdata prev = w->attr;
3215 ev_stat_stat (EV_A_ w);
3216
3217 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3218 if (
3219 prev.st_dev != w->attr.st_dev
3220 || prev.st_ino != w->attr.st_ino
3221 || prev.st_mode != w->attr.st_mode
3222 || prev.st_nlink != w->attr.st_nlink
3223 || prev.st_uid != w->attr.st_uid
3224 || prev.st_gid != w->attr.st_gid
3225 || prev.st_rdev != w->attr.st_rdev
3226 || prev.st_size != w->attr.st_size
3227 || prev.st_atime != w->attr.st_atime
3228 || prev.st_mtime != w->attr.st_mtime
3229 || prev.st_ctime != w->attr.st_ctime
3230 ) {
3231 /* we only update w->prev on actual differences */
3232 /* in case we test more often than invoke the callback, */
3233 /* to ensure that prev is always different to attr */
3234 w->prev = prev;
3235
3236 #if EV_USE_INOTIFY
3237 if (fs_fd >= 0)
3238 {
3239 infy_del (EV_A_ w);
3240 infy_add (EV_A_ w);
3241 ev_stat_stat (EV_A_ w); /* avoid race... */
3242 }
3243 #endif
3244
3245 ev_feed_event (EV_A_ w, EV_STAT);
3246 }
3247 }
3248
3249 void
3250 ev_stat_start (EV_P_ ev_stat *w)
3251 {
3252 if (expect_false (ev_is_active (w)))
3253 return;
3254
3255 ev_stat_stat (EV_A_ w);
3256
3257 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3258 w->interval = MIN_STAT_INTERVAL;
3259
3260 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3261 ev_set_priority (&w->timer, ev_priority (w));
3262
3263 #if EV_USE_INOTIFY
3264 infy_init (EV_A);
3265
3266 if (fs_fd >= 0)
3267 infy_add (EV_A_ w);
3268 else
3269 #endif
3270 {
3271 ev_timer_again (EV_A_ &w->timer);
3272 ev_unref (EV_A);
3273 }
3274
3275 ev_start (EV_A_ (W)w, 1);
3276
3277 EV_FREQUENT_CHECK;
3278 }
3279
3280 void
3281 ev_stat_stop (EV_P_ ev_stat *w)
3282 {
3283 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w)))
3285 return;
3286
3287 EV_FREQUENT_CHECK;
3288
3289 #if EV_USE_INOTIFY
3290 infy_del (EV_A_ w);
3291 #endif
3292
3293 if (ev_is_active (&w->timer))
3294 {
3295 ev_ref (EV_A);
3296 ev_timer_stop (EV_A_ &w->timer);
3297 }
3298
3299 ev_stop (EV_A_ (W)w);
3300
3301 EV_FREQUENT_CHECK;
3302 }
3303 #endif
3304
3305 #if EV_IDLE_ENABLE
3306 void
3307 ev_idle_start (EV_P_ ev_idle *w)
3308 {
3309 if (expect_false (ev_is_active (w)))
3310 return;
3311
3312 pri_adjust (EV_A_ (W)w);
3313
3314 EV_FREQUENT_CHECK;
3315
3316 {
3317 int active = ++idlecnt [ABSPRI (w)];
3318
3319 ++idleall;
3320 ev_start (EV_A_ (W)w, active);
3321
3322 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3323 idles [ABSPRI (w)][active - 1] = w;
3324 }
3325
3326 EV_FREQUENT_CHECK;
3327 }
3328
3329 void
3330 ev_idle_stop (EV_P_ ev_idle *w)
3331 {
3332 clear_pending (EV_A_ (W)w);
3333 if (expect_false (!ev_is_active (w)))
3334 return;
3335
3336 EV_FREQUENT_CHECK;
3337
3338 {
3339 int active = ev_active (w);
3340
3341 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3342 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3343
3344 ev_stop (EV_A_ (W)w);
3345 --idleall;
3346 }
3347
3348 EV_FREQUENT_CHECK;
3349 }
3350 #endif
3351
3352 #if EV_PREPARE_ENABLE
3353 void
3354 ev_prepare_start (EV_P_ ev_prepare *w)
3355 {
3356 if (expect_false (ev_is_active (w)))
3357 return;
3358
3359 EV_FREQUENT_CHECK;
3360
3361 ev_start (EV_A_ (W)w, ++preparecnt);
3362 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3363 prepares [preparecnt - 1] = w;
3364
3365 EV_FREQUENT_CHECK;
3366 }
3367
3368 void
3369 ev_prepare_stop (EV_P_ ev_prepare *w)
3370 {
3371 clear_pending (EV_A_ (W)w);
3372 if (expect_false (!ev_is_active (w)))
3373 return;
3374
3375 EV_FREQUENT_CHECK;
3376
3377 {
3378 int active = ev_active (w);
3379
3380 prepares [active - 1] = prepares [--preparecnt];
3381 ev_active (prepares [active - 1]) = active;
3382 }
3383
3384 ev_stop (EV_A_ (W)w);
3385
3386 EV_FREQUENT_CHECK;
3387 }
3388 #endif
3389
3390 #if EV_CHECK_ENABLE
3391 void
3392 ev_check_start (EV_P_ ev_check *w)
3393 {
3394 if (expect_false (ev_is_active (w)))
3395 return;
3396
3397 EV_FREQUENT_CHECK;
3398
3399 ev_start (EV_A_ (W)w, ++checkcnt);
3400 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3401 checks [checkcnt - 1] = w;
3402
3403 EV_FREQUENT_CHECK;
3404 }
3405
3406 void
3407 ev_check_stop (EV_P_ ev_check *w)
3408 {
3409 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w)))
3411 return;
3412
3413 EV_FREQUENT_CHECK;
3414
3415 {
3416 int active = ev_active (w);
3417
3418 checks [active - 1] = checks [--checkcnt];
3419 ev_active (checks [active - 1]) = active;
3420 }
3421
3422 ev_stop (EV_A_ (W)w);
3423
3424 EV_FREQUENT_CHECK;
3425 }
3426 #endif
3427
3428 #if EV_EMBED_ENABLE
3429 void noinline
3430 ev_embed_sweep (EV_P_ ev_embed *w)
3431 {
3432 ev_loop (w->other, EVLOOP_NONBLOCK);
3433 }
3434
3435 static void
3436 embed_io_cb (EV_P_ ev_io *io, int revents)
3437 {
3438 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3439
3440 if (ev_cb (w))
3441 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3442 else
3443 ev_loop (w->other, EVLOOP_NONBLOCK);
3444 }
3445
3446 static void
3447 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3448 {
3449 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3450
3451 {
3452 EV_P = w->other;
3453
3454 while (fdchangecnt)
3455 {
3456 fd_reify (EV_A);
3457 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3458 }
3459 }
3460 }
3461
3462 static void
3463 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3464 {
3465 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3466
3467 ev_embed_stop (EV_A_ w);
3468
3469 {
3470 EV_P = w->other;
3471
3472 ev_loop_fork (EV_A);
3473 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3474 }
3475
3476 ev_embed_start (EV_A_ w);
3477 }
3478
3479 #if 0
3480 static void
3481 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3482 {
3483 ev_idle_stop (EV_A_ idle);
3484 }
3485 #endif
3486
3487 void
3488 ev_embed_start (EV_P_ ev_embed *w)
3489 {
3490 if (expect_false (ev_is_active (w)))
3491 return;
3492
3493 {
3494 EV_P = w->other;
3495 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3496 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3497 }
3498
3499 EV_FREQUENT_CHECK;
3500
3501 ev_set_priority (&w->io, ev_priority (w));
3502 ev_io_start (EV_A_ &w->io);
3503
3504 ev_prepare_init (&w->prepare, embed_prepare_cb);
3505 ev_set_priority (&w->prepare, EV_MINPRI);
3506 ev_prepare_start (EV_A_ &w->prepare);
3507
3508 ev_fork_init (&w->fork, embed_fork_cb);
3509 ev_fork_start (EV_A_ &w->fork);
3510
3511 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3512
3513 ev_start (EV_A_ (W)w, 1);
3514
3515 EV_FREQUENT_CHECK;
3516 }
3517
3518 void
3519 ev_embed_stop (EV_P_ ev_embed *w)
3520 {
3521 clear_pending (EV_A_ (W)w);
3522 if (expect_false (!ev_is_active (w)))
3523 return;
3524
3525 EV_FREQUENT_CHECK;
3526
3527 ev_io_stop (EV_A_ &w->io);
3528 ev_prepare_stop (EV_A_ &w->prepare);
3529 ev_fork_stop (EV_A_ &w->fork);
3530
3531 ev_stop (EV_A_ (W)w);
3532
3533 EV_FREQUENT_CHECK;
3534 }
3535 #endif
3536
3537 #if EV_FORK_ENABLE
3538 void
3539 ev_fork_start (EV_P_ ev_fork *w)
3540 {
3541 if (expect_false (ev_is_active (w)))
3542 return;
3543
3544 EV_FREQUENT_CHECK;
3545
3546 ev_start (EV_A_ (W)w, ++forkcnt);
3547 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3548 forks [forkcnt - 1] = w;
3549
3550 EV_FREQUENT_CHECK;
3551 }
3552
3553 void
3554 ev_fork_stop (EV_P_ ev_fork *w)
3555 {
3556 clear_pending (EV_A_ (W)w);
3557 if (expect_false (!ev_is_active (w)))
3558 return;
3559
3560 EV_FREQUENT_CHECK;
3561
3562 {
3563 int active = ev_active (w);
3564
3565 forks [active - 1] = forks [--forkcnt];
3566 ev_active (forks [active - 1]) = active;
3567 }
3568
3569 ev_stop (EV_A_ (W)w);
3570
3571 EV_FREQUENT_CHECK;
3572 }
3573 #endif
3574
3575 #if EV_ASYNC_ENABLE
3576 void
3577 ev_async_start (EV_P_ ev_async *w)
3578 {
3579 if (expect_false (ev_is_active (w)))
3580 return;
3581
3582 evpipe_init (EV_A);
3583
3584 EV_FREQUENT_CHECK;
3585
3586 ev_start (EV_A_ (W)w, ++asynccnt);
3587 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3588 asyncs [asynccnt - 1] = w;
3589
3590 EV_FREQUENT_CHECK;
3591 }
3592
3593 void
3594 ev_async_stop (EV_P_ ev_async *w)
3595 {
3596 clear_pending (EV_A_ (W)w);
3597 if (expect_false (!ev_is_active (w)))
3598 return;
3599
3600 EV_FREQUENT_CHECK;
3601
3602 {
3603 int active = ev_active (w);
3604
3605 asyncs [active - 1] = asyncs [--asynccnt];
3606 ev_active (asyncs [active - 1]) = active;
3607 }
3608
3609 ev_stop (EV_A_ (W)w);
3610
3611 EV_FREQUENT_CHECK;
3612 }
3613
3614 void
3615 ev_async_send (EV_P_ ev_async *w)
3616 {
3617 w->sent = 1;
3618 evpipe_write (EV_A_ &async_pending);
3619 }
3620 #endif
3621
3622 /*****************************************************************************/
3623
3624 struct ev_once
3625 {
3626 ev_io io;
3627 ev_timer to;
3628 void (*cb)(int revents, void *arg);
3629 void *arg;
3630 };
3631
3632 static void
3633 once_cb (EV_P_ struct ev_once *once, int revents)
3634 {
3635 void (*cb)(int revents, void *arg) = once->cb;
3636 void *arg = once->arg;
3637
3638 ev_io_stop (EV_A_ &once->io);
3639 ev_timer_stop (EV_A_ &once->to);
3640 ev_free (once);
3641
3642 cb (revents, arg);
3643 }
3644
3645 static void
3646 once_cb_io (EV_P_ ev_io *w, int revents)
3647 {
3648 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3649
3650 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3651 }
3652
3653 static void
3654 once_cb_to (EV_P_ ev_timer *w, int revents)
3655 {
3656 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3657
3658 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3659 }
3660
3661 void
3662 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3663 {
3664 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3665
3666 if (expect_false (!once))
3667 {
3668 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3669 return;
3670 }
3671
3672 once->cb = cb;
3673 once->arg = arg;
3674
3675 ev_init (&once->io, once_cb_io);
3676 if (fd >= 0)
3677 {
3678 ev_io_set (&once->io, fd, events);
3679 ev_io_start (EV_A_ &once->io);
3680 }
3681
3682 ev_init (&once->to, once_cb_to);
3683 if (timeout >= 0.)
3684 {
3685 ev_timer_set (&once->to, timeout, 0.);
3686 ev_timer_start (EV_A_ &once->to);
3687 }
3688 }
3689
3690 /*****************************************************************************/
3691
3692 #if EV_WALK_ENABLE
3693 void
3694 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3695 {
3696 int i, j;
3697 ev_watcher_list *wl, *wn;
3698
3699 if (types & (EV_IO | EV_EMBED))
3700 for (i = 0; i < anfdmax; ++i)
3701 for (wl = anfds [i].head; wl; )
3702 {
3703 wn = wl->next;
3704
3705 #if EV_EMBED_ENABLE
3706 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3707 {
3708 if (types & EV_EMBED)
3709 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3710 }
3711 else
3712 #endif
3713 #if EV_USE_INOTIFY
3714 if (ev_cb ((ev_io *)wl) == infy_cb)
3715 ;
3716 else
3717 #endif
3718 if ((ev_io *)wl != &pipe_w)
3719 if (types & EV_IO)
3720 cb (EV_A_ EV_IO, wl);
3721
3722 wl = wn;
3723 }
3724
3725 if (types & (EV_TIMER | EV_STAT))
3726 for (i = timercnt + HEAP0; i-- > HEAP0; )
3727 #if EV_STAT_ENABLE
3728 /*TODO: timer is not always active*/
3729 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3730 {
3731 if (types & EV_STAT)
3732 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3733 }
3734 else
3735 #endif
3736 if (types & EV_TIMER)
3737 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3738
3739 #if EV_PERIODIC_ENABLE
3740 if (types & EV_PERIODIC)
3741 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3742 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3743 #endif
3744
3745 #if EV_IDLE_ENABLE
3746 if (types & EV_IDLE)
3747 for (j = NUMPRI; i--; )
3748 for (i = idlecnt [j]; i--; )
3749 cb (EV_A_ EV_IDLE, idles [j][i]);
3750 #endif
3751
3752 #if EV_FORK_ENABLE
3753 if (types & EV_FORK)
3754 for (i = forkcnt; i--; )
3755 if (ev_cb (forks [i]) != embed_fork_cb)
3756 cb (EV_A_ EV_FORK, forks [i]);
3757 #endif
3758
3759 #if EV_ASYNC_ENABLE
3760 if (types & EV_ASYNC)
3761 for (i = asynccnt; i--; )
3762 cb (EV_A_ EV_ASYNC, asyncs [i]);
3763 #endif
3764
3765 #if EV_PREPARE_ENABLE
3766 if (types & EV_PREPARE)
3767 for (i = preparecnt; i--; )
3768 # if EV_EMBED_ENABLE
3769 if (ev_cb (prepares [i]) != embed_prepare_cb)
3770 # endif
3771 cb (EV_A_ EV_PREPARE, prepares [i]);
3772 #endif
3773
3774 #if EV_CHECK_ENABLE
3775 if (types & EV_CHECK)
3776 for (i = checkcnt; i--; )
3777 cb (EV_A_ EV_CHECK, checks [i]);
3778 #endif
3779
3780 #if EV_SIGNAL_ENABLE
3781 if (types & EV_SIGNAL)
3782 for (i = 0; i < EV_NSIG - 1; ++i)
3783 for (wl = signals [i].head; wl; )
3784 {
3785 wn = wl->next;
3786 cb (EV_A_ EV_SIGNAL, wl);
3787 wl = wn;
3788 }
3789 #endif
3790
3791 #if EV_CHILD_ENABLE
3792 if (types & EV_CHILD)
3793 for (i = (EV_PID_HASHSIZE); i--; )
3794 for (wl = childs [i]; wl; )
3795 {
3796 wn = wl->next;
3797 cb (EV_A_ EV_CHILD, wl);
3798 wl = wn;
3799 }
3800 #endif
3801 /* EV_STAT 0x00001000 /* stat data changed */
3802 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3803 }
3804 #endif
3805
3806 #if EV_MULTIPLICITY
3807 #include "ev_wrap.h"
3808 #endif
3809
3810 #ifdef __cplusplus
3811 }
3812 #endif
3813