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Revision: 1.346
Committed: Thu Oct 14 05:07:04 2010 UTC (13 years, 9 months ago) by root
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Branch: MAIN
Changes since 1.345: +6 -0 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
456 #if EV_VERIFY >= 3
457 # define EV_FREQUENT_CHECK ev_verify (EV_A)
458 #else
459 # define EV_FREQUENT_CHECK do { } while (0)
460 #endif
461
462 /*
463 * This is used to avoid floating point rounding problems.
464 * It is added to ev_rt_now when scheduling periodics
465 * to ensure progress, time-wise, even when rounding
466 * errors are against us.
467 * This value is good at least till the year 4000.
468 * Better solutions welcome.
469 */
470 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
471
472 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
473 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
474
475 #if __GNUC__ >= 4
476 # define expect(expr,value) __builtin_expect ((expr),(value))
477 # define noinline __attribute__ ((noinline))
478 #else
479 # define expect(expr,value) (expr)
480 # define noinline
481 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
482 # define inline
483 # endif
484 #endif
485
486 #define expect_false(expr) expect ((expr) != 0, 0)
487 #define expect_true(expr) expect ((expr) != 0, 1)
488 #define inline_size static inline
489
490 #if EV_FEATURE_CODE
491 # define inline_speed static inline
492 #else
493 # define inline_speed static noinline
494 #endif
495
496 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
497
498 #if EV_MINPRI == EV_MAXPRI
499 # define ABSPRI(w) (((W)w), 0)
500 #else
501 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
502 #endif
503
504 #define EMPTY /* required for microsofts broken pseudo-c compiler */
505 #define EMPTY2(a,b) /* used to suppress some warnings */
506
507 typedef ev_watcher *W;
508 typedef ev_watcher_list *WL;
509 typedef ev_watcher_time *WT;
510
511 #define ev_active(w) ((W)(w))->active
512 #define ev_at(w) ((WT)(w))->at
513
514 #if EV_USE_REALTIME
515 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
516 /* giving it a reasonably high chance of working on typical architectures */
517 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
518 #endif
519
520 #if EV_USE_MONOTONIC
521 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
522 #endif
523
524 #ifndef EV_FD_TO_WIN32_HANDLE
525 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
526 #endif
527 #ifndef EV_WIN32_HANDLE_TO_FD
528 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
529 #endif
530 #ifndef EV_WIN32_CLOSE_FD
531 # define EV_WIN32_CLOSE_FD(fd) close (fd)
532 #endif
533
534 #ifdef _WIN32
535 # include "ev_win32.c"
536 #endif
537
538 /*****************************************************************************/
539
540 #if EV_AVOID_STDIO
541 static void noinline
542 ev_printerr (const char *msg)
543 {
544 write (STDERR_FILENO, msg, strlen (msg));
545 }
546 #endif
547
548 static void (*syserr_cb)(const char *msg);
549
550 void
551 ev_set_syserr_cb (void (*cb)(const char *msg))
552 {
553 syserr_cb = cb;
554 }
555
556 static void noinline
557 ev_syserr (const char *msg)
558 {
559 if (!msg)
560 msg = "(libev) system error";
561
562 if (syserr_cb)
563 syserr_cb (msg);
564 else
565 {
566 #if EV_AVOID_STDIO
567 const char *err = strerror (errno);
568
569 ev_printerr (msg);
570 ev_printerr (": ");
571 ev_printerr (err);
572 ev_printerr ("\n");
573 #else
574 perror (msg);
575 #endif
576 abort ();
577 }
578 }
579
580 static void *
581 ev_realloc_emul (void *ptr, long size)
582 {
583 #if __GLIBC__
584 return realloc (ptr, size);
585 #else
586 /* some systems, notably openbsd and darwin, fail to properly
587 * implement realloc (x, 0) (as required by both ansi c-89 and
588 * the single unix specification, so work around them here.
589 */
590
591 if (size)
592 return realloc (ptr, size);
593
594 free (ptr);
595 return 0;
596 #endif
597 }
598
599 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
600
601 void
602 ev_set_allocator (void *(*cb)(void *ptr, long size))
603 {
604 alloc = cb;
605 }
606
607 inline_speed void *
608 ev_realloc (void *ptr, long size)
609 {
610 ptr = alloc (ptr, size);
611
612 if (!ptr && size)
613 {
614 #if EV_AVOID_STDIO
615 ev_printerr ("libev: memory allocation failed, aborting.\n");
616 #else
617 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
618 #endif
619 abort ();
620 }
621
622 return ptr;
623 }
624
625 #define ev_malloc(size) ev_realloc (0, (size))
626 #define ev_free(ptr) ev_realloc ((ptr), 0)
627
628 /*****************************************************************************/
629
630 /* set in reify when reification needed */
631 #define EV_ANFD_REIFY 1
632
633 /* file descriptor info structure */
634 typedef struct
635 {
636 WL head;
637 unsigned char events; /* the events watched for */
638 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
639 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
640 unsigned char unused;
641 #if EV_USE_EPOLL
642 unsigned int egen; /* generation counter to counter epoll bugs */
643 #endif
644 #if EV_SELECT_IS_WINSOCKET
645 SOCKET handle;
646 #endif
647 } ANFD;
648
649 /* stores the pending event set for a given watcher */
650 typedef struct
651 {
652 W w;
653 int events; /* the pending event set for the given watcher */
654 } ANPENDING;
655
656 #if EV_USE_INOTIFY
657 /* hash table entry per inotify-id */
658 typedef struct
659 {
660 WL head;
661 } ANFS;
662 #endif
663
664 /* Heap Entry */
665 #if EV_HEAP_CACHE_AT
666 /* a heap element */
667 typedef struct {
668 ev_tstamp at;
669 WT w;
670 } ANHE;
671
672 #define ANHE_w(he) (he).w /* access watcher, read-write */
673 #define ANHE_at(he) (he).at /* access cached at, read-only */
674 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
675 #else
676 /* a heap element */
677 typedef WT ANHE;
678
679 #define ANHE_w(he) (he)
680 #define ANHE_at(he) (he)->at
681 #define ANHE_at_cache(he)
682 #endif
683
684 #if EV_MULTIPLICITY
685
686 struct ev_loop
687 {
688 ev_tstamp ev_rt_now;
689 #define ev_rt_now ((loop)->ev_rt_now)
690 #define VAR(name,decl) decl;
691 #include "ev_vars.h"
692 #undef VAR
693 };
694 #include "ev_wrap.h"
695
696 static struct ev_loop default_loop_struct;
697 struct ev_loop *ev_default_loop_ptr;
698
699 #else
700
701 ev_tstamp ev_rt_now;
702 #define VAR(name,decl) static decl;
703 #include "ev_vars.h"
704 #undef VAR
705
706 static int ev_default_loop_ptr;
707
708 #endif
709
710 #if EV_FEATURE_API
711 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
712 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
713 # define EV_INVOKE_PENDING invoke_cb (EV_A)
714 #else
715 # define EV_RELEASE_CB (void)0
716 # define EV_ACQUIRE_CB (void)0
717 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
718 #endif
719
720 #define EVUNLOOP_RECURSE 0x80
721
722 /*****************************************************************************/
723
724 #ifndef EV_HAVE_EV_TIME
725 ev_tstamp
726 ev_time (void)
727 {
728 #if EV_USE_REALTIME
729 if (expect_true (have_realtime))
730 {
731 struct timespec ts;
732 clock_gettime (CLOCK_REALTIME, &ts);
733 return ts.tv_sec + ts.tv_nsec * 1e-9;
734 }
735 #endif
736
737 struct timeval tv;
738 gettimeofday (&tv, 0);
739 return tv.tv_sec + tv.tv_usec * 1e-6;
740 }
741 #endif
742
743 inline_size ev_tstamp
744 get_clock (void)
745 {
746 #if EV_USE_MONOTONIC
747 if (expect_true (have_monotonic))
748 {
749 struct timespec ts;
750 clock_gettime (CLOCK_MONOTONIC, &ts);
751 return ts.tv_sec + ts.tv_nsec * 1e-9;
752 }
753 #endif
754
755 return ev_time ();
756 }
757
758 #if EV_MULTIPLICITY
759 ev_tstamp
760 ev_now (EV_P)
761 {
762 return ev_rt_now;
763 }
764 #endif
765
766 void
767 ev_sleep (ev_tstamp delay)
768 {
769 if (delay > 0.)
770 {
771 #if EV_USE_NANOSLEEP
772 struct timespec ts;
773
774 ts.tv_sec = (time_t)delay;
775 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
776
777 nanosleep (&ts, 0);
778 #elif defined(_WIN32)
779 Sleep ((unsigned long)(delay * 1e3));
780 #else
781 struct timeval tv;
782
783 tv.tv_sec = (time_t)delay;
784 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
785
786 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
787 /* something not guaranteed by newer posix versions, but guaranteed */
788 /* by older ones */
789 select (0, 0, 0, 0, &tv);
790 #endif
791 }
792 }
793
794 /*****************************************************************************/
795
796 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
797
798 /* find a suitable new size for the given array, */
799 /* hopefully by rounding to a nice-to-malloc size */
800 inline_size int
801 array_nextsize (int elem, int cur, int cnt)
802 {
803 int ncur = cur + 1;
804
805 do
806 ncur <<= 1;
807 while (cnt > ncur);
808
809 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
810 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
811 {
812 ncur *= elem;
813 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
814 ncur = ncur - sizeof (void *) * 4;
815 ncur /= elem;
816 }
817
818 return ncur;
819 }
820
821 static noinline void *
822 array_realloc (int elem, void *base, int *cur, int cnt)
823 {
824 *cur = array_nextsize (elem, *cur, cnt);
825 return ev_realloc (base, elem * *cur);
826 }
827
828 #define array_init_zero(base,count) \
829 memset ((void *)(base), 0, sizeof (*(base)) * (count))
830
831 #define array_needsize(type,base,cur,cnt,init) \
832 if (expect_false ((cnt) > (cur))) \
833 { \
834 int ocur_ = (cur); \
835 (base) = (type *)array_realloc \
836 (sizeof (type), (base), &(cur), (cnt)); \
837 init ((base) + (ocur_), (cur) - ocur_); \
838 }
839
840 #if 0
841 #define array_slim(type,stem) \
842 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
843 { \
844 stem ## max = array_roundsize (stem ## cnt >> 1); \
845 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
846 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
847 }
848 #endif
849
850 #define array_free(stem, idx) \
851 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
852
853 /*****************************************************************************/
854
855 /* dummy callback for pending events */
856 static void noinline
857 pendingcb (EV_P_ ev_prepare *w, int revents)
858 {
859 }
860
861 void noinline
862 ev_feed_event (EV_P_ void *w, int revents)
863 {
864 W w_ = (W)w;
865 int pri = ABSPRI (w_);
866
867 if (expect_false (w_->pending))
868 pendings [pri][w_->pending - 1].events |= revents;
869 else
870 {
871 w_->pending = ++pendingcnt [pri];
872 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
873 pendings [pri][w_->pending - 1].w = w_;
874 pendings [pri][w_->pending - 1].events = revents;
875 }
876 }
877
878 inline_speed void
879 feed_reverse (EV_P_ W w)
880 {
881 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
882 rfeeds [rfeedcnt++] = w;
883 }
884
885 inline_size void
886 feed_reverse_done (EV_P_ int revents)
887 {
888 do
889 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
890 while (rfeedcnt);
891 }
892
893 inline_speed void
894 queue_events (EV_P_ W *events, int eventcnt, int type)
895 {
896 int i;
897
898 for (i = 0; i < eventcnt; ++i)
899 ev_feed_event (EV_A_ events [i], type);
900 }
901
902 /*****************************************************************************/
903
904 inline_speed void
905 fd_event_nocheck (EV_P_ int fd, int revents)
906 {
907 ANFD *anfd = anfds + fd;
908 ev_io *w;
909
910 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
911 {
912 int ev = w->events & revents;
913
914 if (ev)
915 ev_feed_event (EV_A_ (W)w, ev);
916 }
917 }
918
919 /* do not submit kernel events for fds that have reify set */
920 /* because that means they changed while we were polling for new events */
921 inline_speed void
922 fd_event (EV_P_ int fd, int revents)
923 {
924 ANFD *anfd = anfds + fd;
925
926 if (expect_true (!anfd->reify))
927 fd_event_nocheck (EV_A_ fd, revents);
928 }
929
930 void
931 ev_feed_fd_event (EV_P_ int fd, int revents)
932 {
933 if (fd >= 0 && fd < anfdmax)
934 fd_event_nocheck (EV_A_ fd, revents);
935 }
936
937 /* make sure the external fd watch events are in-sync */
938 /* with the kernel/libev internal state */
939 inline_size void
940 fd_reify (EV_P)
941 {
942 int i;
943
944 for (i = 0; i < fdchangecnt; ++i)
945 {
946 int fd = fdchanges [i];
947 ANFD *anfd = anfds + fd;
948 ev_io *w;
949
950 unsigned char events = 0;
951
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
953 events |= (unsigned char)w->events;
954
955 #if EV_SELECT_IS_WINSOCKET
956 if (events)
957 {
958 unsigned long arg;
959 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
960 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
961 }
962 #endif
963
964 {
965 unsigned char o_events = anfd->events;
966 unsigned char o_reify = anfd->reify;
967
968 anfd->reify = 0;
969 anfd->events = events;
970
971 if (o_events != events || o_reify & EV__IOFDSET)
972 backend_modify (EV_A_ fd, o_events, events);
973 }
974 }
975
976 fdchangecnt = 0;
977 }
978
979 /* something about the given fd changed */
980 inline_size void
981 fd_change (EV_P_ int fd, int flags)
982 {
983 unsigned char reify = anfds [fd].reify;
984 anfds [fd].reify |= flags;
985
986 if (expect_true (!reify))
987 {
988 ++fdchangecnt;
989 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
990 fdchanges [fdchangecnt - 1] = fd;
991 }
992 }
993
994 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
995 inline_speed void
996 fd_kill (EV_P_ int fd)
997 {
998 ev_io *w;
999
1000 while ((w = (ev_io *)anfds [fd].head))
1001 {
1002 ev_io_stop (EV_A_ w);
1003 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1004 }
1005 }
1006
1007 /* check whether the given fd is actually valid, for error recovery */
1008 inline_size int
1009 fd_valid (int fd)
1010 {
1011 #ifdef _WIN32
1012 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1013 #else
1014 return fcntl (fd, F_GETFD) != -1;
1015 #endif
1016 }
1017
1018 /* called on EBADF to verify fds */
1019 static void noinline
1020 fd_ebadf (EV_P)
1021 {
1022 int fd;
1023
1024 for (fd = 0; fd < anfdmax; ++fd)
1025 if (anfds [fd].events)
1026 if (!fd_valid (fd) && errno == EBADF)
1027 fd_kill (EV_A_ fd);
1028 }
1029
1030 /* called on ENOMEM in select/poll to kill some fds and retry */
1031 static void noinline
1032 fd_enomem (EV_P)
1033 {
1034 int fd;
1035
1036 for (fd = anfdmax; fd--; )
1037 if (anfds [fd].events)
1038 {
1039 fd_kill (EV_A_ fd);
1040 break;
1041 }
1042 }
1043
1044 /* usually called after fork if backend needs to re-arm all fds from scratch */
1045 static void noinline
1046 fd_rearm_all (EV_P)
1047 {
1048 int fd;
1049
1050 for (fd = 0; fd < anfdmax; ++fd)
1051 if (anfds [fd].events)
1052 {
1053 anfds [fd].events = 0;
1054 anfds [fd].emask = 0;
1055 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1056 }
1057 }
1058
1059 /* used to prepare libev internal fd's */
1060 /* this is not fork-safe */
1061 inline_speed void
1062 fd_intern (int fd)
1063 {
1064 #ifdef _WIN32
1065 unsigned long arg = 1;
1066 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1067 #else
1068 fcntl (fd, F_SETFD, FD_CLOEXEC);
1069 fcntl (fd, F_SETFL, O_NONBLOCK);
1070 #endif
1071 }
1072
1073 /*****************************************************************************/
1074
1075 /*
1076 * the heap functions want a real array index. array index 0 is guaranteed to not
1077 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1078 * the branching factor of the d-tree.
1079 */
1080
1081 /*
1082 * at the moment we allow libev the luxury of two heaps,
1083 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1084 * which is more cache-efficient.
1085 * the difference is about 5% with 50000+ watchers.
1086 */
1087 #if EV_USE_4HEAP
1088
1089 #define DHEAP 4
1090 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1091 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1092 #define UPHEAP_DONE(p,k) ((p) == (k))
1093
1094 /* away from the root */
1095 inline_speed void
1096 downheap (ANHE *heap, int N, int k)
1097 {
1098 ANHE he = heap [k];
1099 ANHE *E = heap + N + HEAP0;
1100
1101 for (;;)
1102 {
1103 ev_tstamp minat;
1104 ANHE *minpos;
1105 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1106
1107 /* find minimum child */
1108 if (expect_true (pos + DHEAP - 1 < E))
1109 {
1110 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1111 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1112 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1113 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1114 }
1115 else if (pos < E)
1116 {
1117 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1118 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1119 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1120 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1121 }
1122 else
1123 break;
1124
1125 if (ANHE_at (he) <= minat)
1126 break;
1127
1128 heap [k] = *minpos;
1129 ev_active (ANHE_w (*minpos)) = k;
1130
1131 k = minpos - heap;
1132 }
1133
1134 heap [k] = he;
1135 ev_active (ANHE_w (he)) = k;
1136 }
1137
1138 #else /* 4HEAP */
1139
1140 #define HEAP0 1
1141 #define HPARENT(k) ((k) >> 1)
1142 #define UPHEAP_DONE(p,k) (!(p))
1143
1144 /* away from the root */
1145 inline_speed void
1146 downheap (ANHE *heap, int N, int k)
1147 {
1148 ANHE he = heap [k];
1149
1150 for (;;)
1151 {
1152 int c = k << 1;
1153
1154 if (c >= N + HEAP0)
1155 break;
1156
1157 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1158 ? 1 : 0;
1159
1160 if (ANHE_at (he) <= ANHE_at (heap [c]))
1161 break;
1162
1163 heap [k] = heap [c];
1164 ev_active (ANHE_w (heap [k])) = k;
1165
1166 k = c;
1167 }
1168
1169 heap [k] = he;
1170 ev_active (ANHE_w (he)) = k;
1171 }
1172 #endif
1173
1174 /* towards the root */
1175 inline_speed void
1176 upheap (ANHE *heap, int k)
1177 {
1178 ANHE he = heap [k];
1179
1180 for (;;)
1181 {
1182 int p = HPARENT (k);
1183
1184 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1185 break;
1186
1187 heap [k] = heap [p];
1188 ev_active (ANHE_w (heap [k])) = k;
1189 k = p;
1190 }
1191
1192 heap [k] = he;
1193 ev_active (ANHE_w (he)) = k;
1194 }
1195
1196 /* move an element suitably so it is in a correct place */
1197 inline_size void
1198 adjustheap (ANHE *heap, int N, int k)
1199 {
1200 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1201 upheap (heap, k);
1202 else
1203 downheap (heap, N, k);
1204 }
1205
1206 /* rebuild the heap: this function is used only once and executed rarely */
1207 inline_size void
1208 reheap (ANHE *heap, int N)
1209 {
1210 int i;
1211
1212 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1213 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1214 for (i = 0; i < N; ++i)
1215 upheap (heap, i + HEAP0);
1216 }
1217
1218 /*****************************************************************************/
1219
1220 /* associate signal watchers to a signal signal */
1221 typedef struct
1222 {
1223 EV_ATOMIC_T pending;
1224 #if EV_MULTIPLICITY
1225 EV_P;
1226 #endif
1227 WL head;
1228 } ANSIG;
1229
1230 static ANSIG signals [EV_NSIG - 1];
1231
1232 /*****************************************************************************/
1233
1234 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1235
1236 static void noinline
1237 evpipe_init (EV_P)
1238 {
1239 if (!ev_is_active (&pipe_w))
1240 {
1241 # if EV_USE_EVENTFD
1242 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1243 if (evfd < 0 && errno == EINVAL)
1244 evfd = eventfd (0, 0);
1245
1246 if (evfd >= 0)
1247 {
1248 evpipe [0] = -1;
1249 fd_intern (evfd); /* doing it twice doesn't hurt */
1250 ev_io_set (&pipe_w, evfd, EV_READ);
1251 }
1252 else
1253 # endif
1254 {
1255 while (pipe (evpipe))
1256 ev_syserr ("(libev) error creating signal/async pipe");
1257
1258 fd_intern (evpipe [0]);
1259 fd_intern (evpipe [1]);
1260 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1261 }
1262
1263 ev_io_start (EV_A_ &pipe_w);
1264 ev_unref (EV_A); /* watcher should not keep loop alive */
1265 }
1266 }
1267
1268 inline_size void
1269 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1270 {
1271 if (!*flag)
1272 {
1273 int old_errno = errno; /* save errno because write might clobber it */
1274 char dummy;
1275
1276 *flag = 1;
1277
1278 #if EV_USE_EVENTFD
1279 if (evfd >= 0)
1280 {
1281 uint64_t counter = 1;
1282 write (evfd, &counter, sizeof (uint64_t));
1283 }
1284 else
1285 #endif
1286 /* win32 people keep sending patches that change this write() to send() */
1287 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1288 /* so when you think this write should be a send instead, please find out */
1289 /* where your send() is from - it's definitely not the microsoft send, and */
1290 /* tell me. thank you. */
1291 write (evpipe [1], &dummy, 1);
1292
1293 errno = old_errno;
1294 }
1295 }
1296
1297 /* called whenever the libev signal pipe */
1298 /* got some events (signal, async) */
1299 static void
1300 pipecb (EV_P_ ev_io *iow, int revents)
1301 {
1302 int i;
1303
1304 #if EV_USE_EVENTFD
1305 if (evfd >= 0)
1306 {
1307 uint64_t counter;
1308 read (evfd, &counter, sizeof (uint64_t));
1309 }
1310 else
1311 #endif
1312 {
1313 char dummy;
1314 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1315 read (evpipe [0], &dummy, 1);
1316 }
1317
1318 if (sig_pending)
1319 {
1320 sig_pending = 0;
1321
1322 for (i = EV_NSIG - 1; i--; )
1323 if (expect_false (signals [i].pending))
1324 ev_feed_signal_event (EV_A_ i + 1);
1325 }
1326
1327 #if EV_ASYNC_ENABLE
1328 if (async_pending)
1329 {
1330 async_pending = 0;
1331
1332 for (i = asynccnt; i--; )
1333 if (asyncs [i]->sent)
1334 {
1335 asyncs [i]->sent = 0;
1336 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1337 }
1338 }
1339 #endif
1340 }
1341
1342 /*****************************************************************************/
1343
1344 static void
1345 ev_sighandler (int signum)
1346 {
1347 #if EV_MULTIPLICITY
1348 EV_P = signals [signum - 1].loop;
1349 #endif
1350
1351 #ifdef _WIN32
1352 signal (signum, ev_sighandler);
1353 #endif
1354
1355 signals [signum - 1].pending = 1;
1356 evpipe_write (EV_A_ &sig_pending);
1357 }
1358
1359 void noinline
1360 ev_feed_signal_event (EV_P_ int signum)
1361 {
1362 WL w;
1363
1364 if (expect_false (signum <= 0 || signum > EV_NSIG))
1365 return;
1366
1367 --signum;
1368
1369 #if EV_MULTIPLICITY
1370 /* it is permissible to try to feed a signal to the wrong loop */
1371 /* or, likely more useful, feeding a signal nobody is waiting for */
1372
1373 if (expect_false (signals [signum].loop != EV_A))
1374 return;
1375 #endif
1376
1377 signals [signum].pending = 0;
1378
1379 for (w = signals [signum].head; w; w = w->next)
1380 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1381 }
1382
1383 #if EV_USE_SIGNALFD
1384 static void
1385 sigfdcb (EV_P_ ev_io *iow, int revents)
1386 {
1387 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1388
1389 for (;;)
1390 {
1391 ssize_t res = read (sigfd, si, sizeof (si));
1392
1393 /* not ISO-C, as res might be -1, but works with SuS */
1394 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1395 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1396
1397 if (res < (ssize_t)sizeof (si))
1398 break;
1399 }
1400 }
1401 #endif
1402
1403 #endif
1404
1405 /*****************************************************************************/
1406
1407 #if EV_CHILD_ENABLE
1408 static WL childs [EV_PID_HASHSIZE];
1409
1410 static ev_signal childev;
1411
1412 #ifndef WIFCONTINUED
1413 # define WIFCONTINUED(status) 0
1414 #endif
1415
1416 /* handle a single child status event */
1417 inline_speed void
1418 child_reap (EV_P_ int chain, int pid, int status)
1419 {
1420 ev_child *w;
1421 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1422
1423 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1424 {
1425 if ((w->pid == pid || !w->pid)
1426 && (!traced || (w->flags & 1)))
1427 {
1428 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1429 w->rpid = pid;
1430 w->rstatus = status;
1431 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1432 }
1433 }
1434 }
1435
1436 #ifndef WCONTINUED
1437 # define WCONTINUED 0
1438 #endif
1439
1440 /* called on sigchld etc., calls waitpid */
1441 static void
1442 childcb (EV_P_ ev_signal *sw, int revents)
1443 {
1444 int pid, status;
1445
1446 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1447 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1448 if (!WCONTINUED
1449 || errno != EINVAL
1450 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1451 return;
1452
1453 /* make sure we are called again until all children have been reaped */
1454 /* we need to do it this way so that the callback gets called before we continue */
1455 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1456
1457 child_reap (EV_A_ pid, pid, status);
1458 if ((EV_PID_HASHSIZE) > 1)
1459 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1460 }
1461
1462 #endif
1463
1464 /*****************************************************************************/
1465
1466 #if EV_USE_PORT
1467 # include "ev_port.c"
1468 #endif
1469 #if EV_USE_KQUEUE
1470 # include "ev_kqueue.c"
1471 #endif
1472 #if EV_USE_EPOLL
1473 # include "ev_epoll.c"
1474 #endif
1475 #if EV_USE_POLL
1476 # include "ev_poll.c"
1477 #endif
1478 #if EV_USE_SELECT
1479 # include "ev_select.c"
1480 #endif
1481
1482 int
1483 ev_version_major (void)
1484 {
1485 return EV_VERSION_MAJOR;
1486 }
1487
1488 int
1489 ev_version_minor (void)
1490 {
1491 return EV_VERSION_MINOR;
1492 }
1493
1494 /* return true if we are running with elevated privileges and should ignore env variables */
1495 int inline_size
1496 enable_secure (void)
1497 {
1498 #ifdef _WIN32
1499 return 0;
1500 #else
1501 return getuid () != geteuid ()
1502 || getgid () != getegid ();
1503 #endif
1504 }
1505
1506 unsigned int
1507 ev_supported_backends (void)
1508 {
1509 unsigned int flags = 0;
1510
1511 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1512 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1513 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1514 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1515 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1516
1517 return flags;
1518 }
1519
1520 unsigned int
1521 ev_recommended_backends (void)
1522 {
1523 unsigned int flags = ev_supported_backends ();
1524
1525 #ifndef __NetBSD__
1526 /* kqueue is borked on everything but netbsd apparently */
1527 /* it usually doesn't work correctly on anything but sockets and pipes */
1528 flags &= ~EVBACKEND_KQUEUE;
1529 #endif
1530 #ifdef __APPLE__
1531 /* only select works correctly on that "unix-certified" platform */
1532 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1533 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1534 #endif
1535 #ifdef __FreeBSD__
1536 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1537 #endif
1538
1539 return flags;
1540 }
1541
1542 unsigned int
1543 ev_embeddable_backends (void)
1544 {
1545 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1546
1547 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1548 /* please fix it and tell me how to detect the fix */
1549 flags &= ~EVBACKEND_EPOLL;
1550
1551 return flags;
1552 }
1553
1554 unsigned int
1555 ev_backend (EV_P)
1556 {
1557 return backend;
1558 }
1559
1560 #if EV_FEATURE_API
1561 unsigned int
1562 ev_iteration (EV_P)
1563 {
1564 return loop_count;
1565 }
1566
1567 unsigned int
1568 ev_depth (EV_P)
1569 {
1570 return loop_depth;
1571 }
1572
1573 void
1574 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1575 {
1576 io_blocktime = interval;
1577 }
1578
1579 void
1580 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1581 {
1582 timeout_blocktime = interval;
1583 }
1584
1585 void
1586 ev_set_userdata (EV_P_ void *data)
1587 {
1588 userdata = data;
1589 }
1590
1591 void *
1592 ev_userdata (EV_P)
1593 {
1594 return userdata;
1595 }
1596
1597 void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1598 {
1599 invoke_cb = invoke_pending_cb;
1600 }
1601
1602 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1603 {
1604 release_cb = release;
1605 acquire_cb = acquire;
1606 }
1607 #endif
1608
1609 /* initialise a loop structure, must be zero-initialised */
1610 static void noinline
1611 loop_init (EV_P_ unsigned int flags)
1612 {
1613 if (!backend)
1614 {
1615 #if EV_USE_REALTIME
1616 if (!have_realtime)
1617 {
1618 struct timespec ts;
1619
1620 if (!clock_gettime (CLOCK_REALTIME, &ts))
1621 have_realtime = 1;
1622 }
1623 #endif
1624
1625 #if EV_USE_MONOTONIC
1626 if (!have_monotonic)
1627 {
1628 struct timespec ts;
1629
1630 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1631 have_monotonic = 1;
1632 }
1633 #endif
1634
1635 /* pid check not overridable via env */
1636 #ifndef _WIN32
1637 if (flags & EVFLAG_FORKCHECK)
1638 curpid = getpid ();
1639 #endif
1640
1641 if (!(flags & EVFLAG_NOENV)
1642 && !enable_secure ()
1643 && getenv ("LIBEV_FLAGS"))
1644 flags = atoi (getenv ("LIBEV_FLAGS"));
1645
1646 ev_rt_now = ev_time ();
1647 mn_now = get_clock ();
1648 now_floor = mn_now;
1649 rtmn_diff = ev_rt_now - mn_now;
1650 #if EV_FEATURE_API
1651 invoke_cb = ev_invoke_pending;
1652 #endif
1653
1654 io_blocktime = 0.;
1655 timeout_blocktime = 0.;
1656 backend = 0;
1657 backend_fd = -1;
1658 sig_pending = 0;
1659 #if EV_ASYNC_ENABLE
1660 async_pending = 0;
1661 #endif
1662 #if EV_USE_INOTIFY
1663 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1664 #endif
1665 #if EV_USE_SIGNALFD
1666 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1667 #endif
1668
1669 if (!(flags & 0x0000ffffU))
1670 flags |= ev_recommended_backends ();
1671
1672 #if EV_USE_PORT
1673 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1674 #endif
1675 #if EV_USE_KQUEUE
1676 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1677 #endif
1678 #if EV_USE_EPOLL
1679 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1680 #endif
1681 #if EV_USE_POLL
1682 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1683 #endif
1684 #if EV_USE_SELECT
1685 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1686 #endif
1687
1688 ev_prepare_init (&pending_w, pendingcb);
1689
1690 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1691 ev_init (&pipe_w, pipecb);
1692 ev_set_priority (&pipe_w, EV_MAXPRI);
1693 #endif
1694 }
1695 }
1696
1697 /* free up a loop structure */
1698 static void noinline
1699 loop_destroy (EV_P)
1700 {
1701 int i;
1702
1703 if (ev_is_active (&pipe_w))
1704 {
1705 /*ev_ref (EV_A);*/
1706 /*ev_io_stop (EV_A_ &pipe_w);*/
1707
1708 #if EV_USE_EVENTFD
1709 if (evfd >= 0)
1710 close (evfd);
1711 #endif
1712
1713 if (evpipe [0] >= 0)
1714 {
1715 EV_WIN32_CLOSE_FD (evpipe [0]);
1716 EV_WIN32_CLOSE_FD (evpipe [1]);
1717 }
1718 }
1719
1720 #if EV_USE_SIGNALFD
1721 if (ev_is_active (&sigfd_w))
1722 close (sigfd);
1723 #endif
1724
1725 #if EV_USE_INOTIFY
1726 if (fs_fd >= 0)
1727 close (fs_fd);
1728 #endif
1729
1730 if (backend_fd >= 0)
1731 close (backend_fd);
1732
1733 #if EV_USE_PORT
1734 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1735 #endif
1736 #if EV_USE_KQUEUE
1737 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1738 #endif
1739 #if EV_USE_EPOLL
1740 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1741 #endif
1742 #if EV_USE_POLL
1743 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1744 #endif
1745 #if EV_USE_SELECT
1746 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1747 #endif
1748
1749 for (i = NUMPRI; i--; )
1750 {
1751 array_free (pending, [i]);
1752 #if EV_IDLE_ENABLE
1753 array_free (idle, [i]);
1754 #endif
1755 }
1756
1757 ev_free (anfds); anfds = 0; anfdmax = 0;
1758
1759 /* have to use the microsoft-never-gets-it-right macro */
1760 array_free (rfeed, EMPTY);
1761 array_free (fdchange, EMPTY);
1762 array_free (timer, EMPTY);
1763 #if EV_PERIODIC_ENABLE
1764 array_free (periodic, EMPTY);
1765 #endif
1766 #if EV_FORK_ENABLE
1767 array_free (fork, EMPTY);
1768 #endif
1769 array_free (prepare, EMPTY);
1770 array_free (check, EMPTY);
1771 #if EV_ASYNC_ENABLE
1772 array_free (async, EMPTY);
1773 #endif
1774
1775 backend = 0;
1776 }
1777
1778 #if EV_USE_INOTIFY
1779 inline_size void infy_fork (EV_P);
1780 #endif
1781
1782 inline_size void
1783 loop_fork (EV_P)
1784 {
1785 #if EV_USE_PORT
1786 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1787 #endif
1788 #if EV_USE_KQUEUE
1789 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1790 #endif
1791 #if EV_USE_EPOLL
1792 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1793 #endif
1794 #if EV_USE_INOTIFY
1795 infy_fork (EV_A);
1796 #endif
1797
1798 if (ev_is_active (&pipe_w))
1799 {
1800 /* this "locks" the handlers against writing to the pipe */
1801 /* while we modify the fd vars */
1802 sig_pending = 1;
1803 #if EV_ASYNC_ENABLE
1804 async_pending = 1;
1805 #endif
1806
1807 ev_ref (EV_A);
1808 ev_io_stop (EV_A_ &pipe_w);
1809
1810 #if EV_USE_EVENTFD
1811 if (evfd >= 0)
1812 close (evfd);
1813 #endif
1814
1815 if (evpipe [0] >= 0)
1816 {
1817 EV_WIN32_CLOSE_FD (evpipe [0]);
1818 EV_WIN32_CLOSE_FD (evpipe [1]);
1819 }
1820
1821 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1822 evpipe_init (EV_A);
1823 /* now iterate over everything, in case we missed something */
1824 pipecb (EV_A_ &pipe_w, EV_READ);
1825 #endif
1826 }
1827
1828 postfork = 0;
1829 }
1830
1831 #if EV_MULTIPLICITY
1832
1833 struct ev_loop *
1834 ev_loop_new (unsigned int flags)
1835 {
1836 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1837
1838 memset (EV_A, 0, sizeof (struct ev_loop));
1839 loop_init (EV_A_ flags);
1840
1841 if (ev_backend (EV_A))
1842 return EV_A;
1843
1844 return 0;
1845 }
1846
1847 void
1848 ev_loop_destroy (EV_P)
1849 {
1850 loop_destroy (EV_A);
1851 ev_free (loop);
1852 }
1853
1854 void
1855 ev_loop_fork (EV_P)
1856 {
1857 postfork = 1; /* must be in line with ev_default_fork */
1858 }
1859 #endif /* multiplicity */
1860
1861 #if EV_VERIFY
1862 static void noinline
1863 verify_watcher (EV_P_ W w)
1864 {
1865 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1866
1867 if (w->pending)
1868 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1869 }
1870
1871 static void noinline
1872 verify_heap (EV_P_ ANHE *heap, int N)
1873 {
1874 int i;
1875
1876 for (i = HEAP0; i < N + HEAP0; ++i)
1877 {
1878 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1879 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1880 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1881
1882 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1883 }
1884 }
1885
1886 static void noinline
1887 array_verify (EV_P_ W *ws, int cnt)
1888 {
1889 while (cnt--)
1890 {
1891 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1892 verify_watcher (EV_A_ ws [cnt]);
1893 }
1894 }
1895 #endif
1896
1897 #if EV_FEATURE_API
1898 void
1899 ev_verify (EV_P)
1900 {
1901 #if EV_VERIFY
1902 int i;
1903 WL w;
1904
1905 assert (activecnt >= -1);
1906
1907 assert (fdchangemax >= fdchangecnt);
1908 for (i = 0; i < fdchangecnt; ++i)
1909 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1910
1911 assert (anfdmax >= 0);
1912 for (i = 0; i < anfdmax; ++i)
1913 for (w = anfds [i].head; w; w = w->next)
1914 {
1915 verify_watcher (EV_A_ (W)w);
1916 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1917 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1918 }
1919
1920 assert (timermax >= timercnt);
1921 verify_heap (EV_A_ timers, timercnt);
1922
1923 #if EV_PERIODIC_ENABLE
1924 assert (periodicmax >= periodiccnt);
1925 verify_heap (EV_A_ periodics, periodiccnt);
1926 #endif
1927
1928 for (i = NUMPRI; i--; )
1929 {
1930 assert (pendingmax [i] >= pendingcnt [i]);
1931 #if EV_IDLE_ENABLE
1932 assert (idleall >= 0);
1933 assert (idlemax [i] >= idlecnt [i]);
1934 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1935 #endif
1936 }
1937
1938 #if EV_FORK_ENABLE
1939 assert (forkmax >= forkcnt);
1940 array_verify (EV_A_ (W *)forks, forkcnt);
1941 #endif
1942
1943 #if EV_ASYNC_ENABLE
1944 assert (asyncmax >= asynccnt);
1945 array_verify (EV_A_ (W *)asyncs, asynccnt);
1946 #endif
1947
1948 #if EV_PREPARE_ENABLE
1949 assert (preparemax >= preparecnt);
1950 array_verify (EV_A_ (W *)prepares, preparecnt);
1951 #endif
1952
1953 #if EV_CHECK_ENABLE
1954 assert (checkmax >= checkcnt);
1955 array_verify (EV_A_ (W *)checks, checkcnt);
1956 #endif
1957
1958 # if 0
1959 #if EV_CHILD_ENABLE
1960 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1961 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1962 #endif
1963 # endif
1964 #endif
1965 }
1966 #endif
1967
1968 #if EV_MULTIPLICITY
1969 struct ev_loop *
1970 ev_default_loop_init (unsigned int flags)
1971 #else
1972 int
1973 ev_default_loop (unsigned int flags)
1974 #endif
1975 {
1976 if (!ev_default_loop_ptr)
1977 {
1978 #if EV_MULTIPLICITY
1979 EV_P = ev_default_loop_ptr = &default_loop_struct;
1980 #else
1981 ev_default_loop_ptr = 1;
1982 #endif
1983
1984 loop_init (EV_A_ flags);
1985
1986 if (ev_backend (EV_A))
1987 {
1988 #if EV_CHILD_ENABLE
1989 ev_signal_init (&childev, childcb, SIGCHLD);
1990 ev_set_priority (&childev, EV_MAXPRI);
1991 ev_signal_start (EV_A_ &childev);
1992 ev_unref (EV_A); /* child watcher should not keep loop alive */
1993 #endif
1994 }
1995 else
1996 ev_default_loop_ptr = 0;
1997 }
1998
1999 return ev_default_loop_ptr;
2000 }
2001
2002 void
2003 ev_default_destroy (void)
2004 {
2005 #if EV_MULTIPLICITY
2006 EV_P = ev_default_loop_ptr;
2007 #endif
2008
2009 ev_default_loop_ptr = 0;
2010
2011 #if EV_CHILD_ENABLE
2012 ev_ref (EV_A); /* child watcher */
2013 ev_signal_stop (EV_A_ &childev);
2014 #endif
2015
2016 loop_destroy (EV_A);
2017 }
2018
2019 void
2020 ev_default_fork (void)
2021 {
2022 #if EV_MULTIPLICITY
2023 EV_P = ev_default_loop_ptr;
2024 #endif
2025
2026 postfork = 1; /* must be in line with ev_loop_fork */
2027 }
2028
2029 /*****************************************************************************/
2030
2031 void
2032 ev_invoke (EV_P_ void *w, int revents)
2033 {
2034 EV_CB_INVOKE ((W)w, revents);
2035 }
2036
2037 unsigned int
2038 ev_pending_count (EV_P)
2039 {
2040 int pri;
2041 unsigned int count = 0;
2042
2043 for (pri = NUMPRI; pri--; )
2044 count += pendingcnt [pri];
2045
2046 return count;
2047 }
2048
2049 void noinline
2050 ev_invoke_pending (EV_P)
2051 {
2052 int pri;
2053
2054 for (pri = NUMPRI; pri--; )
2055 while (pendingcnt [pri])
2056 {
2057 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2058
2059 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2060 /* ^ this is no longer true, as pending_w could be here */
2061
2062 p->w->pending = 0;
2063 EV_CB_INVOKE (p->w, p->events);
2064 EV_FREQUENT_CHECK;
2065 }
2066 }
2067
2068 #if EV_IDLE_ENABLE
2069 /* make idle watchers pending. this handles the "call-idle */
2070 /* only when higher priorities are idle" logic */
2071 inline_size void
2072 idle_reify (EV_P)
2073 {
2074 if (expect_false (idleall))
2075 {
2076 int pri;
2077
2078 for (pri = NUMPRI; pri--; )
2079 {
2080 if (pendingcnt [pri])
2081 break;
2082
2083 if (idlecnt [pri])
2084 {
2085 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2086 break;
2087 }
2088 }
2089 }
2090 }
2091 #endif
2092
2093 /* make timers pending */
2094 inline_size void
2095 timers_reify (EV_P)
2096 {
2097 EV_FREQUENT_CHECK;
2098
2099 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2100 {
2101 do
2102 {
2103 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2104
2105 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2106
2107 /* first reschedule or stop timer */
2108 if (w->repeat)
2109 {
2110 ev_at (w) += w->repeat;
2111 if (ev_at (w) < mn_now)
2112 ev_at (w) = mn_now;
2113
2114 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2115
2116 ANHE_at_cache (timers [HEAP0]);
2117 downheap (timers, timercnt, HEAP0);
2118 }
2119 else
2120 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2121
2122 EV_FREQUENT_CHECK;
2123 feed_reverse (EV_A_ (W)w);
2124 }
2125 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2126
2127 feed_reverse_done (EV_A_ EV_TIMER);
2128 }
2129 }
2130
2131 #if EV_PERIODIC_ENABLE
2132 /* make periodics pending */
2133 inline_size void
2134 periodics_reify (EV_P)
2135 {
2136 EV_FREQUENT_CHECK;
2137
2138 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2139 {
2140 int feed_count = 0;
2141
2142 do
2143 {
2144 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2145
2146 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2147
2148 /* first reschedule or stop timer */
2149 if (w->reschedule_cb)
2150 {
2151 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2152
2153 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2154
2155 ANHE_at_cache (periodics [HEAP0]);
2156 downheap (periodics, periodiccnt, HEAP0);
2157 }
2158 else if (w->interval)
2159 {
2160 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2161 /* if next trigger time is not sufficiently in the future, put it there */
2162 /* this might happen because of floating point inexactness */
2163 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2164 {
2165 ev_at (w) += w->interval;
2166
2167 /* if interval is unreasonably low we might still have a time in the past */
2168 /* so correct this. this will make the periodic very inexact, but the user */
2169 /* has effectively asked to get triggered more often than possible */
2170 if (ev_at (w) < ev_rt_now)
2171 ev_at (w) = ev_rt_now;
2172 }
2173
2174 ANHE_at_cache (periodics [HEAP0]);
2175 downheap (periodics, periodiccnt, HEAP0);
2176 }
2177 else
2178 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2179
2180 EV_FREQUENT_CHECK;
2181 feed_reverse (EV_A_ (W)w);
2182 }
2183 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2184
2185 feed_reverse_done (EV_A_ EV_PERIODIC);
2186 }
2187 }
2188
2189 /* simply recalculate all periodics */
2190 /* TODO: maybe ensure that at least one event happens when jumping forward? */
2191 static void noinline
2192 periodics_reschedule (EV_P)
2193 {
2194 int i;
2195
2196 /* adjust periodics after time jump */
2197 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2198 {
2199 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2200
2201 if (w->reschedule_cb)
2202 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2203 else if (w->interval)
2204 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2205
2206 ANHE_at_cache (periodics [i]);
2207 }
2208
2209 reheap (periodics, periodiccnt);
2210 }
2211 #endif
2212
2213 /* adjust all timers by a given offset */
2214 static void noinline
2215 timers_reschedule (EV_P_ ev_tstamp adjust)
2216 {
2217 int i;
2218
2219 for (i = 0; i < timercnt; ++i)
2220 {
2221 ANHE *he = timers + i + HEAP0;
2222 ANHE_w (*he)->at += adjust;
2223 ANHE_at_cache (*he);
2224 }
2225 }
2226
2227 /* fetch new monotonic and realtime times from the kernel */
2228 /* also detect if there was a timejump, and act accordingly */
2229 inline_speed void
2230 time_update (EV_P_ ev_tstamp max_block)
2231 {
2232 #if EV_USE_MONOTONIC
2233 if (expect_true (have_monotonic))
2234 {
2235 int i;
2236 ev_tstamp odiff = rtmn_diff;
2237
2238 mn_now = get_clock ();
2239
2240 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2241 /* interpolate in the meantime */
2242 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2243 {
2244 ev_rt_now = rtmn_diff + mn_now;
2245 return;
2246 }
2247
2248 now_floor = mn_now;
2249 ev_rt_now = ev_time ();
2250
2251 /* loop a few times, before making important decisions.
2252 * on the choice of "4": one iteration isn't enough,
2253 * in case we get preempted during the calls to
2254 * ev_time and get_clock. a second call is almost guaranteed
2255 * to succeed in that case, though. and looping a few more times
2256 * doesn't hurt either as we only do this on time-jumps or
2257 * in the unlikely event of having been preempted here.
2258 */
2259 for (i = 4; --i; )
2260 {
2261 rtmn_diff = ev_rt_now - mn_now;
2262
2263 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2264 return; /* all is well */
2265
2266 ev_rt_now = ev_time ();
2267 mn_now = get_clock ();
2268 now_floor = mn_now;
2269 }
2270
2271 /* no timer adjustment, as the monotonic clock doesn't jump */
2272 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2273 # if EV_PERIODIC_ENABLE
2274 periodics_reschedule (EV_A);
2275 # endif
2276 }
2277 else
2278 #endif
2279 {
2280 ev_rt_now = ev_time ();
2281
2282 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2283 {
2284 /* adjust timers. this is easy, as the offset is the same for all of them */
2285 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2286 #if EV_PERIODIC_ENABLE
2287 periodics_reschedule (EV_A);
2288 #endif
2289 }
2290
2291 mn_now = ev_rt_now;
2292 }
2293 }
2294
2295 void
2296 ev_loop (EV_P_ int flags)
2297 {
2298 #if EV_FEATURE_API
2299 ++loop_depth;
2300 #endif
2301
2302 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2303
2304 loop_done = EVUNLOOP_CANCEL;
2305
2306 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2307
2308 do
2309 {
2310 #if EV_VERIFY >= 2
2311 ev_verify (EV_A);
2312 #endif
2313
2314 #ifndef _WIN32
2315 if (expect_false (curpid)) /* penalise the forking check even more */
2316 if (expect_false (getpid () != curpid))
2317 {
2318 curpid = getpid ();
2319 postfork = 1;
2320 }
2321 #endif
2322
2323 #if EV_FORK_ENABLE
2324 /* we might have forked, so queue fork handlers */
2325 if (expect_false (postfork))
2326 if (forkcnt)
2327 {
2328 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2329 EV_INVOKE_PENDING;
2330 }
2331 #endif
2332
2333 #if EV_PREPARE_ENABLE
2334 /* queue prepare watchers (and execute them) */
2335 if (expect_false (preparecnt))
2336 {
2337 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2338 EV_INVOKE_PENDING;
2339 }
2340 #endif
2341
2342 if (expect_false (loop_done))
2343 break;
2344
2345 /* we might have forked, so reify kernel state if necessary */
2346 if (expect_false (postfork))
2347 loop_fork (EV_A);
2348
2349 /* update fd-related kernel structures */
2350 fd_reify (EV_A);
2351
2352 /* calculate blocking time */
2353 {
2354 ev_tstamp waittime = 0.;
2355 ev_tstamp sleeptime = 0.;
2356
2357 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2358 {
2359 /* remember old timestamp for io_blocktime calculation */
2360 ev_tstamp prev_mn_now = mn_now;
2361
2362 /* update time to cancel out callback processing overhead */
2363 time_update (EV_A_ 1e100);
2364
2365 waittime = MAX_BLOCKTIME;
2366
2367 if (timercnt)
2368 {
2369 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2370 if (waittime > to) waittime = to;
2371 }
2372
2373 #if EV_PERIODIC_ENABLE
2374 if (periodiccnt)
2375 {
2376 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2377 if (waittime > to) waittime = to;
2378 }
2379 #endif
2380
2381 /* don't let timeouts decrease the waittime below timeout_blocktime */
2382 if (expect_false (waittime < timeout_blocktime))
2383 waittime = timeout_blocktime;
2384
2385 /* extra check because io_blocktime is commonly 0 */
2386 if (expect_false (io_blocktime))
2387 {
2388 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2389
2390 if (sleeptime > waittime - backend_fudge)
2391 sleeptime = waittime - backend_fudge;
2392
2393 if (expect_true (sleeptime > 0.))
2394 {
2395 ev_sleep (sleeptime);
2396 waittime -= sleeptime;
2397 }
2398 }
2399 }
2400
2401 #if EV_FEATURE_API
2402 ++loop_count;
2403 #endif
2404 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2405 backend_poll (EV_A_ waittime);
2406 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2407
2408 /* update ev_rt_now, do magic */
2409 time_update (EV_A_ waittime + sleeptime);
2410 }
2411
2412 /* queue pending timers and reschedule them */
2413 timers_reify (EV_A); /* relative timers called last */
2414 #if EV_PERIODIC_ENABLE
2415 periodics_reify (EV_A); /* absolute timers called first */
2416 #endif
2417
2418 #if EV_IDLE_ENABLE
2419 /* queue idle watchers unless other events are pending */
2420 idle_reify (EV_A);
2421 #endif
2422
2423 #if EV_CHECK_ENABLE
2424 /* queue check watchers, to be executed first */
2425 if (expect_false (checkcnt))
2426 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2427 #endif
2428
2429 EV_INVOKE_PENDING;
2430 }
2431 while (expect_true (
2432 activecnt
2433 && !loop_done
2434 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2435 ));
2436
2437 if (loop_done == EVUNLOOP_ONE)
2438 loop_done = EVUNLOOP_CANCEL;
2439
2440 #if EV_FEATURE_API
2441 --loop_depth;
2442 #endif
2443 }
2444
2445 void
2446 ev_unloop (EV_P_ int how)
2447 {
2448 loop_done = how;
2449 }
2450
2451 void
2452 ev_ref (EV_P)
2453 {
2454 ++activecnt;
2455 }
2456
2457 void
2458 ev_unref (EV_P)
2459 {
2460 --activecnt;
2461 }
2462
2463 void
2464 ev_now_update (EV_P)
2465 {
2466 time_update (EV_A_ 1e100);
2467 }
2468
2469 void
2470 ev_suspend (EV_P)
2471 {
2472 ev_now_update (EV_A);
2473 }
2474
2475 void
2476 ev_resume (EV_P)
2477 {
2478 ev_tstamp mn_prev = mn_now;
2479
2480 ev_now_update (EV_A);
2481 timers_reschedule (EV_A_ mn_now - mn_prev);
2482 #if EV_PERIODIC_ENABLE
2483 /* TODO: really do this? */
2484 periodics_reschedule (EV_A);
2485 #endif
2486 }
2487
2488 /*****************************************************************************/
2489 /* singly-linked list management, used when the expected list length is short */
2490
2491 inline_size void
2492 wlist_add (WL *head, WL elem)
2493 {
2494 elem->next = *head;
2495 *head = elem;
2496 }
2497
2498 inline_size void
2499 wlist_del (WL *head, WL elem)
2500 {
2501 while (*head)
2502 {
2503 if (expect_true (*head == elem))
2504 {
2505 *head = elem->next;
2506 break;
2507 }
2508
2509 head = &(*head)->next;
2510 }
2511 }
2512
2513 /* internal, faster, version of ev_clear_pending */
2514 inline_speed void
2515 clear_pending (EV_P_ W w)
2516 {
2517 if (w->pending)
2518 {
2519 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2520 w->pending = 0;
2521 }
2522 }
2523
2524 int
2525 ev_clear_pending (EV_P_ void *w)
2526 {
2527 W w_ = (W)w;
2528 int pending = w_->pending;
2529
2530 if (expect_true (pending))
2531 {
2532 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2533 p->w = (W)&pending_w;
2534 w_->pending = 0;
2535 return p->events;
2536 }
2537 else
2538 return 0;
2539 }
2540
2541 inline_size void
2542 pri_adjust (EV_P_ W w)
2543 {
2544 int pri = ev_priority (w);
2545 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2546 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2547 ev_set_priority (w, pri);
2548 }
2549
2550 inline_speed void
2551 ev_start (EV_P_ W w, int active)
2552 {
2553 pri_adjust (EV_A_ w);
2554 w->active = active;
2555 ev_ref (EV_A);
2556 }
2557
2558 inline_size void
2559 ev_stop (EV_P_ W w)
2560 {
2561 ev_unref (EV_A);
2562 w->active = 0;
2563 }
2564
2565 /*****************************************************************************/
2566
2567 void noinline
2568 ev_io_start (EV_P_ ev_io *w)
2569 {
2570 int fd = w->fd;
2571
2572 if (expect_false (ev_is_active (w)))
2573 return;
2574
2575 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2576 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2577
2578 EV_FREQUENT_CHECK;
2579
2580 ev_start (EV_A_ (W)w, 1);
2581 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2582 wlist_add (&anfds[fd].head, (WL)w);
2583
2584 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2585 w->events &= ~EV__IOFDSET;
2586
2587 EV_FREQUENT_CHECK;
2588 }
2589
2590 void noinline
2591 ev_io_stop (EV_P_ ev_io *w)
2592 {
2593 clear_pending (EV_A_ (W)w);
2594 if (expect_false (!ev_is_active (w)))
2595 return;
2596
2597 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2598
2599 EV_FREQUENT_CHECK;
2600
2601 wlist_del (&anfds[w->fd].head, (WL)w);
2602 ev_stop (EV_A_ (W)w);
2603
2604 fd_change (EV_A_ w->fd, 1);
2605
2606 EV_FREQUENT_CHECK;
2607 }
2608
2609 void noinline
2610 ev_timer_start (EV_P_ ev_timer *w)
2611 {
2612 if (expect_false (ev_is_active (w)))
2613 return;
2614
2615 ev_at (w) += mn_now;
2616
2617 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2618
2619 EV_FREQUENT_CHECK;
2620
2621 ++timercnt;
2622 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2623 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2624 ANHE_w (timers [ev_active (w)]) = (WT)w;
2625 ANHE_at_cache (timers [ev_active (w)]);
2626 upheap (timers, ev_active (w));
2627
2628 EV_FREQUENT_CHECK;
2629
2630 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2631 }
2632
2633 void noinline
2634 ev_timer_stop (EV_P_ ev_timer *w)
2635 {
2636 clear_pending (EV_A_ (W)w);
2637 if (expect_false (!ev_is_active (w)))
2638 return;
2639
2640 EV_FREQUENT_CHECK;
2641
2642 {
2643 int active = ev_active (w);
2644
2645 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2646
2647 --timercnt;
2648
2649 if (expect_true (active < timercnt + HEAP0))
2650 {
2651 timers [active] = timers [timercnt + HEAP0];
2652 adjustheap (timers, timercnt, active);
2653 }
2654 }
2655
2656 ev_at (w) -= mn_now;
2657
2658 ev_stop (EV_A_ (W)w);
2659
2660 EV_FREQUENT_CHECK;
2661 }
2662
2663 void noinline
2664 ev_timer_again (EV_P_ ev_timer *w)
2665 {
2666 EV_FREQUENT_CHECK;
2667
2668 if (ev_is_active (w))
2669 {
2670 if (w->repeat)
2671 {
2672 ev_at (w) = mn_now + w->repeat;
2673 ANHE_at_cache (timers [ev_active (w)]);
2674 adjustheap (timers, timercnt, ev_active (w));
2675 }
2676 else
2677 ev_timer_stop (EV_A_ w);
2678 }
2679 else if (w->repeat)
2680 {
2681 ev_at (w) = w->repeat;
2682 ev_timer_start (EV_A_ w);
2683 }
2684
2685 EV_FREQUENT_CHECK;
2686 }
2687
2688 ev_tstamp
2689 ev_timer_remaining (EV_P_ ev_timer *w)
2690 {
2691 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2692 }
2693
2694 #if EV_PERIODIC_ENABLE
2695 void noinline
2696 ev_periodic_start (EV_P_ ev_periodic *w)
2697 {
2698 if (expect_false (ev_is_active (w)))
2699 return;
2700
2701 if (w->reschedule_cb)
2702 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2703 else if (w->interval)
2704 {
2705 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2706 /* this formula differs from the one in periodic_reify because we do not always round up */
2707 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2708 }
2709 else
2710 ev_at (w) = w->offset;
2711
2712 EV_FREQUENT_CHECK;
2713
2714 ++periodiccnt;
2715 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2716 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2717 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2718 ANHE_at_cache (periodics [ev_active (w)]);
2719 upheap (periodics, ev_active (w));
2720
2721 EV_FREQUENT_CHECK;
2722
2723 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2724 }
2725
2726 void noinline
2727 ev_periodic_stop (EV_P_ ev_periodic *w)
2728 {
2729 clear_pending (EV_A_ (W)w);
2730 if (expect_false (!ev_is_active (w)))
2731 return;
2732
2733 EV_FREQUENT_CHECK;
2734
2735 {
2736 int active = ev_active (w);
2737
2738 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2739
2740 --periodiccnt;
2741
2742 if (expect_true (active < periodiccnt + HEAP0))
2743 {
2744 periodics [active] = periodics [periodiccnt + HEAP0];
2745 adjustheap (periodics, periodiccnt, active);
2746 }
2747 }
2748
2749 ev_stop (EV_A_ (W)w);
2750
2751 EV_FREQUENT_CHECK;
2752 }
2753
2754 void noinline
2755 ev_periodic_again (EV_P_ ev_periodic *w)
2756 {
2757 /* TODO: use adjustheap and recalculation */
2758 ev_periodic_stop (EV_A_ w);
2759 ev_periodic_start (EV_A_ w);
2760 }
2761 #endif
2762
2763 #ifndef SA_RESTART
2764 # define SA_RESTART 0
2765 #endif
2766
2767 #if EV_SIGNAL_ENABLE
2768
2769 void noinline
2770 ev_signal_start (EV_P_ ev_signal *w)
2771 {
2772 if (expect_false (ev_is_active (w)))
2773 return;
2774
2775 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2776
2777 #if EV_MULTIPLICITY
2778 assert (("libev: a signal must not be attached to two different loops",
2779 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2780
2781 signals [w->signum - 1].loop = EV_A;
2782 #endif
2783
2784 EV_FREQUENT_CHECK;
2785
2786 #if EV_USE_SIGNALFD
2787 if (sigfd == -2)
2788 {
2789 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2790 if (sigfd < 0 && errno == EINVAL)
2791 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2792
2793 if (sigfd >= 0)
2794 {
2795 fd_intern (sigfd); /* doing it twice will not hurt */
2796
2797 sigemptyset (&sigfd_set);
2798
2799 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2800 ev_set_priority (&sigfd_w, EV_MAXPRI);
2801 ev_io_start (EV_A_ &sigfd_w);
2802 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2803 }
2804 }
2805
2806 if (sigfd >= 0)
2807 {
2808 /* TODO: check .head */
2809 sigaddset (&sigfd_set, w->signum);
2810 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2811
2812 signalfd (sigfd, &sigfd_set, 0);
2813 }
2814 #endif
2815
2816 ev_start (EV_A_ (W)w, 1);
2817 wlist_add (&signals [w->signum - 1].head, (WL)w);
2818
2819 if (!((WL)w)->next)
2820 # if EV_USE_SIGNALFD
2821 if (sigfd < 0) /*TODO*/
2822 # endif
2823 {
2824 # ifdef _WIN32
2825 evpipe_init (EV_A);
2826
2827 signal (w->signum, ev_sighandler);
2828 # else
2829 struct sigaction sa;
2830
2831 evpipe_init (EV_A);
2832
2833 sa.sa_handler = ev_sighandler;
2834 sigfillset (&sa.sa_mask);
2835 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2836 sigaction (w->signum, &sa, 0);
2837
2838 sigemptyset (&sa.sa_mask);
2839 sigaddset (&sa.sa_mask, w->signum);
2840 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2841 #endif
2842 }
2843
2844 EV_FREQUENT_CHECK;
2845 }
2846
2847 void noinline
2848 ev_signal_stop (EV_P_ ev_signal *w)
2849 {
2850 clear_pending (EV_A_ (W)w);
2851 if (expect_false (!ev_is_active (w)))
2852 return;
2853
2854 EV_FREQUENT_CHECK;
2855
2856 wlist_del (&signals [w->signum - 1].head, (WL)w);
2857 ev_stop (EV_A_ (W)w);
2858
2859 if (!signals [w->signum - 1].head)
2860 {
2861 #if EV_MULTIPLICITY
2862 signals [w->signum - 1].loop = 0; /* unattach from signal */
2863 #endif
2864 #if EV_USE_SIGNALFD
2865 if (sigfd >= 0)
2866 {
2867 sigset_t ss;
2868
2869 sigemptyset (&ss);
2870 sigaddset (&ss, w->signum);
2871 sigdelset (&sigfd_set, w->signum);
2872
2873 signalfd (sigfd, &sigfd_set, 0);
2874 sigprocmask (SIG_UNBLOCK, &ss, 0);
2875 }
2876 else
2877 #endif
2878 signal (w->signum, SIG_DFL);
2879 }
2880
2881 EV_FREQUENT_CHECK;
2882 }
2883
2884 #endif
2885
2886 #if EV_CHILD_ENABLE
2887
2888 void
2889 ev_child_start (EV_P_ ev_child *w)
2890 {
2891 #if EV_MULTIPLICITY
2892 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2893 #endif
2894 if (expect_false (ev_is_active (w)))
2895 return;
2896
2897 EV_FREQUENT_CHECK;
2898
2899 ev_start (EV_A_ (W)w, 1);
2900 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2901
2902 EV_FREQUENT_CHECK;
2903 }
2904
2905 void
2906 ev_child_stop (EV_P_ ev_child *w)
2907 {
2908 clear_pending (EV_A_ (W)w);
2909 if (expect_false (!ev_is_active (w)))
2910 return;
2911
2912 EV_FREQUENT_CHECK;
2913
2914 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2915 ev_stop (EV_A_ (W)w);
2916
2917 EV_FREQUENT_CHECK;
2918 }
2919
2920 #endif
2921
2922 #if EV_STAT_ENABLE
2923
2924 # ifdef _WIN32
2925 # undef lstat
2926 # define lstat(a,b) _stati64 (a,b)
2927 # endif
2928
2929 #define DEF_STAT_INTERVAL 5.0074891
2930 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2931 #define MIN_STAT_INTERVAL 0.1074891
2932
2933 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2934
2935 #if EV_USE_INOTIFY
2936
2937 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2938 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2939
2940 static void noinline
2941 infy_add (EV_P_ ev_stat *w)
2942 {
2943 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);
2944
2945 if (w->wd >= 0)
2946 {
2947 struct statfs sfs;
2948
2949 /* now local changes will be tracked by inotify, but remote changes won't */
2950 /* unless the filesystem is known to be local, we therefore still poll */
2951 /* also do poll on <2.6.25, but with normal frequency */
2952
2953 if (!fs_2625)
2954 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2955 else if (!statfs (w->path, &sfs)
2956 && (sfs.f_type == 0x1373 /* devfs */
2957 || sfs.f_type == 0xEF53 /* ext2/3 */
2958 || sfs.f_type == 0x3153464a /* jfs */
2959 || sfs.f_type == 0x52654973 /* reiser3 */
2960 || sfs.f_type == 0x01021994 /* tempfs */
2961 || sfs.f_type == 0x58465342 /* xfs */))
2962 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2963 else
2964 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2965 }
2966 else
2967 {
2968 /* can't use inotify, continue to stat */
2969 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2970
2971 /* if path is not there, monitor some parent directory for speedup hints */
2972 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2973 /* but an efficiency issue only */
2974 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2975 {
2976 char path [4096];
2977 strcpy (path, w->path);
2978
2979 do
2980 {
2981 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2982 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2983
2984 char *pend = strrchr (path, '/');
2985
2986 if (!pend || pend == path)
2987 break;
2988
2989 *pend = 0;
2990 w->wd = inotify_add_watch (fs_fd, path, mask);
2991 }
2992 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2993 }
2994 }
2995
2996 if (w->wd >= 0)
2997 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2998
2999 /* now re-arm timer, if required */
3000 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3001 ev_timer_again (EV_A_ &w->timer);
3002 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3003 }
3004
3005 static void noinline
3006 infy_del (EV_P_ ev_stat *w)
3007 {
3008 int slot;
3009 int wd = w->wd;
3010
3011 if (wd < 0)
3012 return;
3013
3014 w->wd = -2;
3015 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3016 wlist_del (&fs_hash [slot].head, (WL)w);
3017
3018 /* remove this watcher, if others are watching it, they will rearm */
3019 inotify_rm_watch (fs_fd, wd);
3020 }
3021
3022 static void noinline
3023 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3024 {
3025 if (slot < 0)
3026 /* overflow, need to check for all hash slots */
3027 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3028 infy_wd (EV_A_ slot, wd, ev);
3029 else
3030 {
3031 WL w_;
3032
3033 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3034 {
3035 ev_stat *w = (ev_stat *)w_;
3036 w_ = w_->next; /* lets us remove this watcher and all before it */
3037
3038 if (w->wd == wd || wd == -1)
3039 {
3040 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3041 {
3042 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3043 w->wd = -1;
3044 infy_add (EV_A_ w); /* re-add, no matter what */
3045 }
3046
3047 stat_timer_cb (EV_A_ &w->timer, 0);
3048 }
3049 }
3050 }
3051 }
3052
3053 static void
3054 infy_cb (EV_P_ ev_io *w, int revents)
3055 {
3056 char buf [EV_INOTIFY_BUFSIZE];
3057 int ofs;
3058 int len = read (fs_fd, buf, sizeof (buf));
3059
3060 for (ofs = 0; ofs < len; )
3061 {
3062 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3063 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3064 ofs += sizeof (struct inotify_event) + ev->len;
3065 }
3066 }
3067
3068 inline_size unsigned int
3069 ev_linux_version (void)
3070 {
3071 struct utsname buf;
3072 unsigned int v;
3073 int i;
3074 char *p = buf.release;
3075
3076 if (uname (&buf))
3077 return 0;
3078
3079 for (i = 3+1; --i; )
3080 {
3081 unsigned int c = 0;
3082
3083 for (;;)
3084 {
3085 if (*p >= '0' && *p <= '9')
3086 c = c * 10 + *p++ - '0';
3087 else
3088 {
3089 p += *p == '.';
3090 break;
3091 }
3092 }
3093
3094 v = (v << 8) | c;
3095 }
3096
3097 return v;
3098 }
3099
3100 inline_size void
3101 ev_check_2625 (EV_P)
3102 {
3103 /* kernels < 2.6.25 are borked
3104 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3105 */
3106 if (ev_linux_version () < 0x020619)
3107 return;
3108
3109 fs_2625 = 1;
3110 }
3111
3112 inline_size int
3113 infy_newfd (void)
3114 {
3115 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3116 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3117 if (fd >= 0)
3118 return fd;
3119 #endif
3120 return inotify_init ();
3121 }
3122
3123 inline_size void
3124 infy_init (EV_P)
3125 {
3126 if (fs_fd != -2)
3127 return;
3128
3129 fs_fd = -1;
3130
3131 ev_check_2625 (EV_A);
3132
3133 fs_fd = infy_newfd ();
3134
3135 if (fs_fd >= 0)
3136 {
3137 fd_intern (fs_fd);
3138 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3139 ev_set_priority (&fs_w, EV_MAXPRI);
3140 ev_io_start (EV_A_ &fs_w);
3141 ev_unref (EV_A);
3142 }
3143 }
3144
3145 inline_size void
3146 infy_fork (EV_P)
3147 {
3148 int slot;
3149
3150 if (fs_fd < 0)
3151 return;
3152
3153 ev_ref (EV_A);
3154 ev_io_stop (EV_A_ &fs_w);
3155 close (fs_fd);
3156 fs_fd = infy_newfd ();
3157
3158 if (fs_fd >= 0)
3159 {
3160 fd_intern (fs_fd);
3161 ev_io_set (&fs_w, fs_fd, EV_READ);
3162 ev_io_start (EV_A_ &fs_w);
3163 ev_unref (EV_A);
3164 }
3165
3166 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3167 {
3168 WL w_ = fs_hash [slot].head;
3169 fs_hash [slot].head = 0;
3170
3171 while (w_)
3172 {
3173 ev_stat *w = (ev_stat *)w_;
3174 w_ = w_->next; /* lets us add this watcher */
3175
3176 w->wd = -1;
3177
3178 if (fs_fd >= 0)
3179 infy_add (EV_A_ w); /* re-add, no matter what */
3180 else
3181 {
3182 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3183 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3184 ev_timer_again (EV_A_ &w->timer);
3185 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3186 }
3187 }
3188 }
3189 }
3190
3191 #endif
3192
3193 #ifdef _WIN32
3194 # define EV_LSTAT(p,b) _stati64 (p, b)
3195 #else
3196 # define EV_LSTAT(p,b) lstat (p, b)
3197 #endif
3198
3199 void
3200 ev_stat_stat (EV_P_ ev_stat *w)
3201 {
3202 if (lstat (w->path, &w->attr) < 0)
3203 w->attr.st_nlink = 0;
3204 else if (!w->attr.st_nlink)
3205 w->attr.st_nlink = 1;
3206 }
3207
3208 static void noinline
3209 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3210 {
3211 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3212
3213 ev_statdata prev = w->attr;
3214 ev_stat_stat (EV_A_ w);
3215
3216 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3217 if (
3218 prev.st_dev != w->attr.st_dev
3219 || prev.st_ino != w->attr.st_ino
3220 || prev.st_mode != w->attr.st_mode
3221 || prev.st_nlink != w->attr.st_nlink
3222 || prev.st_uid != w->attr.st_uid
3223 || prev.st_gid != w->attr.st_gid
3224 || prev.st_rdev != w->attr.st_rdev
3225 || prev.st_size != w->attr.st_size
3226 || prev.st_atime != w->attr.st_atime
3227 || prev.st_mtime != w->attr.st_mtime
3228 || prev.st_ctime != w->attr.st_ctime
3229 ) {
3230 /* we only update w->prev on actual differences */
3231 /* in case we test more often than invoke the callback, */
3232 /* to ensure that prev is always different to attr */
3233 w->prev = prev;
3234
3235 #if EV_USE_INOTIFY
3236 if (fs_fd >= 0)
3237 {
3238 infy_del (EV_A_ w);
3239 infy_add (EV_A_ w);
3240 ev_stat_stat (EV_A_ w); /* avoid race... */
3241 }
3242 #endif
3243
3244 ev_feed_event (EV_A_ w, EV_STAT);
3245 }
3246 }
3247
3248 void
3249 ev_stat_start (EV_P_ ev_stat *w)
3250 {
3251 if (expect_false (ev_is_active (w)))
3252 return;
3253
3254 ev_stat_stat (EV_A_ w);
3255
3256 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3257 w->interval = MIN_STAT_INTERVAL;
3258
3259 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3260 ev_set_priority (&w->timer, ev_priority (w));
3261
3262 #if EV_USE_INOTIFY
3263 infy_init (EV_A);
3264
3265 if (fs_fd >= 0)
3266 infy_add (EV_A_ w);
3267 else
3268 #endif
3269 {
3270 ev_timer_again (EV_A_ &w->timer);
3271 ev_unref (EV_A);
3272 }
3273
3274 ev_start (EV_A_ (W)w, 1);
3275
3276 EV_FREQUENT_CHECK;
3277 }
3278
3279 void
3280 ev_stat_stop (EV_P_ ev_stat *w)
3281 {
3282 clear_pending (EV_A_ (W)w);
3283 if (expect_false (!ev_is_active (w)))
3284 return;
3285
3286 EV_FREQUENT_CHECK;
3287
3288 #if EV_USE_INOTIFY
3289 infy_del (EV_A_ w);
3290 #endif
3291
3292 if (ev_is_active (&w->timer))
3293 {
3294 ev_ref (EV_A);
3295 ev_timer_stop (EV_A_ &w->timer);
3296 }
3297
3298 ev_stop (EV_A_ (W)w);
3299
3300 EV_FREQUENT_CHECK;
3301 }
3302 #endif
3303
3304 #if EV_IDLE_ENABLE
3305 void
3306 ev_idle_start (EV_P_ ev_idle *w)
3307 {
3308 if (expect_false (ev_is_active (w)))
3309 return;
3310
3311 pri_adjust (EV_A_ (W)w);
3312
3313 EV_FREQUENT_CHECK;
3314
3315 {
3316 int active = ++idlecnt [ABSPRI (w)];
3317
3318 ++idleall;
3319 ev_start (EV_A_ (W)w, active);
3320
3321 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3322 idles [ABSPRI (w)][active - 1] = w;
3323 }
3324
3325 EV_FREQUENT_CHECK;
3326 }
3327
3328 void
3329 ev_idle_stop (EV_P_ ev_idle *w)
3330 {
3331 clear_pending (EV_A_ (W)w);
3332 if (expect_false (!ev_is_active (w)))
3333 return;
3334
3335 EV_FREQUENT_CHECK;
3336
3337 {
3338 int active = ev_active (w);
3339
3340 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3341 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3342
3343 ev_stop (EV_A_ (W)w);
3344 --idleall;
3345 }
3346
3347 EV_FREQUENT_CHECK;
3348 }
3349 #endif
3350
3351 #if EV_PREPARE_ENABLE
3352 void
3353 ev_prepare_start (EV_P_ ev_prepare *w)
3354 {
3355 if (expect_false (ev_is_active (w)))
3356 return;
3357
3358 EV_FREQUENT_CHECK;
3359
3360 ev_start (EV_A_ (W)w, ++preparecnt);
3361 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3362 prepares [preparecnt - 1] = w;
3363
3364 EV_FREQUENT_CHECK;
3365 }
3366
3367 void
3368 ev_prepare_stop (EV_P_ ev_prepare *w)
3369 {
3370 clear_pending (EV_A_ (W)w);
3371 if (expect_false (!ev_is_active (w)))
3372 return;
3373
3374 EV_FREQUENT_CHECK;
3375
3376 {
3377 int active = ev_active (w);
3378
3379 prepares [active - 1] = prepares [--preparecnt];
3380 ev_active (prepares [active - 1]) = active;
3381 }
3382
3383 ev_stop (EV_A_ (W)w);
3384
3385 EV_FREQUENT_CHECK;
3386 }
3387 #endif
3388
3389 #if EV_CHECK_ENABLE
3390 void
3391 ev_check_start (EV_P_ ev_check *w)
3392 {
3393 if (expect_false (ev_is_active (w)))
3394 return;
3395
3396 EV_FREQUENT_CHECK;
3397
3398 ev_start (EV_A_ (W)w, ++checkcnt);
3399 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3400 checks [checkcnt - 1] = w;
3401
3402 EV_FREQUENT_CHECK;
3403 }
3404
3405 void
3406 ev_check_stop (EV_P_ ev_check *w)
3407 {
3408 clear_pending (EV_A_ (W)w);
3409 if (expect_false (!ev_is_active (w)))
3410 return;
3411
3412 EV_FREQUENT_CHECK;
3413
3414 {
3415 int active = ev_active (w);
3416
3417 checks [active - 1] = checks [--checkcnt];
3418 ev_active (checks [active - 1]) = active;
3419 }
3420
3421 ev_stop (EV_A_ (W)w);
3422
3423 EV_FREQUENT_CHECK;
3424 }
3425 #endif
3426
3427 #if EV_EMBED_ENABLE
3428 void noinline
3429 ev_embed_sweep (EV_P_ ev_embed *w)
3430 {
3431 ev_loop (w->other, EVLOOP_NONBLOCK);
3432 }
3433
3434 static void
3435 embed_io_cb (EV_P_ ev_io *io, int revents)
3436 {
3437 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3438
3439 if (ev_cb (w))
3440 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3441 else
3442 ev_loop (w->other, EVLOOP_NONBLOCK);
3443 }
3444
3445 static void
3446 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3447 {
3448 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3449
3450 {
3451 EV_P = w->other;
3452
3453 while (fdchangecnt)
3454 {
3455 fd_reify (EV_A);
3456 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3457 }
3458 }
3459 }
3460
3461 static void
3462 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3463 {
3464 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3465
3466 ev_embed_stop (EV_A_ w);
3467
3468 {
3469 EV_P = w->other;
3470
3471 ev_loop_fork (EV_A);
3472 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3473 }
3474
3475 ev_embed_start (EV_A_ w);
3476 }
3477
3478 #if 0
3479 static void
3480 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3481 {
3482 ev_idle_stop (EV_A_ idle);
3483 }
3484 #endif
3485
3486 void
3487 ev_embed_start (EV_P_ ev_embed *w)
3488 {
3489 if (expect_false (ev_is_active (w)))
3490 return;
3491
3492 {
3493 EV_P = w->other;
3494 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3495 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3496 }
3497
3498 EV_FREQUENT_CHECK;
3499
3500 ev_set_priority (&w->io, ev_priority (w));
3501 ev_io_start (EV_A_ &w->io);
3502
3503 ev_prepare_init (&w->prepare, embed_prepare_cb);
3504 ev_set_priority (&w->prepare, EV_MINPRI);
3505 ev_prepare_start (EV_A_ &w->prepare);
3506
3507 ev_fork_init (&w->fork, embed_fork_cb);
3508 ev_fork_start (EV_A_ &w->fork);
3509
3510 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3511
3512 ev_start (EV_A_ (W)w, 1);
3513
3514 EV_FREQUENT_CHECK;
3515 }
3516
3517 void
3518 ev_embed_stop (EV_P_ ev_embed *w)
3519 {
3520 clear_pending (EV_A_ (W)w);
3521 if (expect_false (!ev_is_active (w)))
3522 return;
3523
3524 EV_FREQUENT_CHECK;
3525
3526 ev_io_stop (EV_A_ &w->io);
3527 ev_prepare_stop (EV_A_ &w->prepare);
3528 ev_fork_stop (EV_A_ &w->fork);
3529
3530 ev_stop (EV_A_ (W)w);
3531
3532 EV_FREQUENT_CHECK;
3533 }
3534 #endif
3535
3536 #if EV_FORK_ENABLE
3537 void
3538 ev_fork_start (EV_P_ ev_fork *w)
3539 {
3540 if (expect_false (ev_is_active (w)))
3541 return;
3542
3543 EV_FREQUENT_CHECK;
3544
3545 ev_start (EV_A_ (W)w, ++forkcnt);
3546 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3547 forks [forkcnt - 1] = w;
3548
3549 EV_FREQUENT_CHECK;
3550 }
3551
3552 void
3553 ev_fork_stop (EV_P_ ev_fork *w)
3554 {
3555 clear_pending (EV_A_ (W)w);
3556 if (expect_false (!ev_is_active (w)))
3557 return;
3558
3559 EV_FREQUENT_CHECK;
3560
3561 {
3562 int active = ev_active (w);
3563
3564 forks [active - 1] = forks [--forkcnt];
3565 ev_active (forks [active - 1]) = active;
3566 }
3567
3568 ev_stop (EV_A_ (W)w);
3569
3570 EV_FREQUENT_CHECK;
3571 }
3572 #endif
3573
3574 #if EV_ASYNC_ENABLE
3575 void
3576 ev_async_start (EV_P_ ev_async *w)
3577 {
3578 if (expect_false (ev_is_active (w)))
3579 return;
3580
3581 evpipe_init (EV_A);
3582
3583 EV_FREQUENT_CHECK;
3584
3585 ev_start (EV_A_ (W)w, ++asynccnt);
3586 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3587 asyncs [asynccnt - 1] = w;
3588
3589 EV_FREQUENT_CHECK;
3590 }
3591
3592 void
3593 ev_async_stop (EV_P_ ev_async *w)
3594 {
3595 clear_pending (EV_A_ (W)w);
3596 if (expect_false (!ev_is_active (w)))
3597 return;
3598
3599 EV_FREQUENT_CHECK;
3600
3601 {
3602 int active = ev_active (w);
3603
3604 asyncs [active - 1] = asyncs [--asynccnt];
3605 ev_active (asyncs [active - 1]) = active;
3606 }
3607
3608 ev_stop (EV_A_ (W)w);
3609
3610 EV_FREQUENT_CHECK;
3611 }
3612
3613 void
3614 ev_async_send (EV_P_ ev_async *w)
3615 {
3616 w->sent = 1;
3617 evpipe_write (EV_A_ &async_pending);
3618 }
3619 #endif
3620
3621 /*****************************************************************************/
3622
3623 struct ev_once
3624 {
3625 ev_io io;
3626 ev_timer to;
3627 void (*cb)(int revents, void *arg);
3628 void *arg;
3629 };
3630
3631 static void
3632 once_cb (EV_P_ struct ev_once *once, int revents)
3633 {
3634 void (*cb)(int revents, void *arg) = once->cb;
3635 void *arg = once->arg;
3636
3637 ev_io_stop (EV_A_ &once->io);
3638 ev_timer_stop (EV_A_ &once->to);
3639 ev_free (once);
3640
3641 cb (revents, arg);
3642 }
3643
3644 static void
3645 once_cb_io (EV_P_ ev_io *w, int revents)
3646 {
3647 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3648
3649 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3650 }
3651
3652 static void
3653 once_cb_to (EV_P_ ev_timer *w, int revents)
3654 {
3655 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3656
3657 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3658 }
3659
3660 void
3661 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3662 {
3663 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3664
3665 if (expect_false (!once))
3666 {
3667 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3668 return;
3669 }
3670
3671 once->cb = cb;
3672 once->arg = arg;
3673
3674 ev_init (&once->io, once_cb_io);
3675 if (fd >= 0)
3676 {
3677 ev_io_set (&once->io, fd, events);
3678 ev_io_start (EV_A_ &once->io);
3679 }
3680
3681 ev_init (&once->to, once_cb_to);
3682 if (timeout >= 0.)
3683 {
3684 ev_timer_set (&once->to, timeout, 0.);
3685 ev_timer_start (EV_A_ &once->to);
3686 }
3687 }
3688
3689 /*****************************************************************************/
3690
3691 #if EV_WALK_ENABLE
3692 void
3693 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3694 {
3695 int i, j;
3696 ev_watcher_list *wl, *wn;
3697
3698 if (types & (EV_IO | EV_EMBED))
3699 for (i = 0; i < anfdmax; ++i)
3700 for (wl = anfds [i].head; wl; )
3701 {
3702 wn = wl->next;
3703
3704 #if EV_EMBED_ENABLE
3705 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3706 {
3707 if (types & EV_EMBED)
3708 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3709 }
3710 else
3711 #endif
3712 #if EV_USE_INOTIFY
3713 if (ev_cb ((ev_io *)wl) == infy_cb)
3714 ;
3715 else
3716 #endif
3717 if ((ev_io *)wl != &pipe_w)
3718 if (types & EV_IO)
3719 cb (EV_A_ EV_IO, wl);
3720
3721 wl = wn;
3722 }
3723
3724 if (types & (EV_TIMER | EV_STAT))
3725 for (i = timercnt + HEAP0; i-- > HEAP0; )
3726 #if EV_STAT_ENABLE
3727 /*TODO: timer is not always active*/
3728 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3729 {
3730 if (types & EV_STAT)
3731 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3732 }
3733 else
3734 #endif
3735 if (types & EV_TIMER)
3736 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3737
3738 #if EV_PERIODIC_ENABLE
3739 if (types & EV_PERIODIC)
3740 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3741 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3742 #endif
3743
3744 #if EV_IDLE_ENABLE
3745 if (types & EV_IDLE)
3746 for (j = NUMPRI; i--; )
3747 for (i = idlecnt [j]; i--; )
3748 cb (EV_A_ EV_IDLE, idles [j][i]);
3749 #endif
3750
3751 #if EV_FORK_ENABLE
3752 if (types & EV_FORK)
3753 for (i = forkcnt; i--; )
3754 if (ev_cb (forks [i]) != embed_fork_cb)
3755 cb (EV_A_ EV_FORK, forks [i]);
3756 #endif
3757
3758 #if EV_ASYNC_ENABLE
3759 if (types & EV_ASYNC)
3760 for (i = asynccnt; i--; )
3761 cb (EV_A_ EV_ASYNC, asyncs [i]);
3762 #endif
3763
3764 #if EV_PREPARE_ENABLE
3765 if (types & EV_PREPARE)
3766 for (i = preparecnt; i--; )
3767 # if EV_EMBED_ENABLE
3768 if (ev_cb (prepares [i]) != embed_prepare_cb)
3769 # endif
3770 cb (EV_A_ EV_PREPARE, prepares [i]);
3771 #endif
3772
3773 #if EV_CHECK_ENABLE
3774 if (types & EV_CHECK)
3775 for (i = checkcnt; i--; )
3776 cb (EV_A_ EV_CHECK, checks [i]);
3777 #endif
3778
3779 #if EV_SIGNAL_ENABLE
3780 if (types & EV_SIGNAL)
3781 for (i = 0; i < EV_NSIG - 1; ++i)
3782 for (wl = signals [i].head; wl; )
3783 {
3784 wn = wl->next;
3785 cb (EV_A_ EV_SIGNAL, wl);
3786 wl = wn;
3787 }
3788 #endif
3789
3790 #if EV_CHILD_ENABLE
3791 if (types & EV_CHILD)
3792 for (i = (EV_PID_HASHSIZE); i--; )
3793 for (wl = childs [i]; wl; )
3794 {
3795 wn = wl->next;
3796 cb (EV_A_ EV_CHILD, wl);
3797 wl = wn;
3798 }
3799 #endif
3800 /* EV_STAT 0x00001000 /* stat data changed */
3801 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3802 }
3803 #endif
3804
3805 #if EV_MULTIPLICITY
3806 #include "ev_wrap.h"
3807 #endif
3808
3809 #ifdef __cplusplus
3810 }
3811 #endif
3812