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Revision: 1.395
Committed: Wed Aug 24 16:08:17 2011 UTC (12 years, 11 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.394: +1 -1 lines
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File Contents

# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 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 /* this big block deduces configuration from config.h */
41 #ifndef EV_STANDALONE
42 # ifdef EV_CONFIG_H
43 # include EV_CONFIG_H
44 # else
45 # include "config.h"
46 # endif
47
48 #if HAVE_FLOOR
49 # ifndef EV_USE_FLOOR
50 # define EV_USE_FLOOR 1
51 # endif
52 #endif
53
54 # if HAVE_CLOCK_SYSCALL
55 # ifndef EV_USE_CLOCK_SYSCALL
56 # define EV_USE_CLOCK_SYSCALL 1
57 # ifndef EV_USE_REALTIME
58 # define EV_USE_REALTIME 0
59 # endif
60 # ifndef EV_USE_MONOTONIC
61 # define EV_USE_MONOTONIC 1
62 # endif
63 # endif
64 # elif !defined(EV_USE_CLOCK_SYSCALL)
65 # define EV_USE_CLOCK_SYSCALL 0
66 # endif
67
68 # if HAVE_CLOCK_GETTIME
69 # ifndef EV_USE_MONOTONIC
70 # define EV_USE_MONOTONIC 1
71 # endif
72 # ifndef EV_USE_REALTIME
73 # define EV_USE_REALTIME 0
74 # endif
75 # else
76 # ifndef EV_USE_MONOTONIC
77 # define EV_USE_MONOTONIC 0
78 # endif
79 # ifndef EV_USE_REALTIME
80 # define EV_USE_REALTIME 0
81 # endif
82 # endif
83
84 # if HAVE_NANOSLEEP
85 # ifndef EV_USE_NANOSLEEP
86 # define EV_USE_NANOSLEEP EV_FEATURE_OS
87 # endif
88 # else
89 # undef EV_USE_NANOSLEEP
90 # define EV_USE_NANOSLEEP 0
91 # endif
92
93 # if HAVE_SELECT && HAVE_SYS_SELECT_H
94 # ifndef EV_USE_SELECT
95 # define EV_USE_SELECT EV_FEATURE_BACKENDS
96 # endif
97 # else
98 # undef EV_USE_SELECT
99 # define EV_USE_SELECT 0
100 # endif
101
102 # if HAVE_POLL && HAVE_POLL_H
103 # ifndef EV_USE_POLL
104 # define EV_USE_POLL EV_FEATURE_BACKENDS
105 # endif
106 # else
107 # undef EV_USE_POLL
108 # define EV_USE_POLL 0
109 # endif
110
111 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112 # ifndef EV_USE_EPOLL
113 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
114 # endif
115 # else
116 # undef EV_USE_EPOLL
117 # define EV_USE_EPOLL 0
118 # endif
119
120 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121 # ifndef EV_USE_KQUEUE
122 # define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123 # endif
124 # else
125 # undef EV_USE_KQUEUE
126 # define EV_USE_KQUEUE 0
127 # endif
128
129 # if HAVE_PORT_H && HAVE_PORT_CREATE
130 # ifndef EV_USE_PORT
131 # define EV_USE_PORT EV_FEATURE_BACKENDS
132 # endif
133 # else
134 # undef EV_USE_PORT
135 # define EV_USE_PORT 0
136 # endif
137
138 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139 # ifndef EV_USE_INOTIFY
140 # define EV_USE_INOTIFY EV_FEATURE_OS
141 # endif
142 # else
143 # undef EV_USE_INOTIFY
144 # define EV_USE_INOTIFY 0
145 # endif
146
147 # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148 # ifndef EV_USE_SIGNALFD
149 # define EV_USE_SIGNALFD EV_FEATURE_OS
150 # endif
151 # else
152 # undef EV_USE_SIGNALFD
153 # define EV_USE_SIGNALFD 0
154 # endif
155
156 # if HAVE_EVENTFD
157 # ifndef EV_USE_EVENTFD
158 # define EV_USE_EVENTFD EV_FEATURE_OS
159 # endif
160 # else
161 # undef EV_USE_EVENTFD
162 # define EV_USE_EVENTFD 0
163 # endif
164
165 #endif
166
167 #include <stdlib.h>
168 #include <string.h>
169 #include <fcntl.h>
170 #include <stddef.h>
171
172 #include <stdio.h>
173
174 #include <assert.h>
175 #include <errno.h>
176 #include <sys/types.h>
177 #include <time.h>
178 #include <limits.h>
179
180 #include <signal.h>
181
182 #ifdef EV_H
183 # include EV_H
184 #else
185 # include "ev.h"
186 #endif
187
188 EV_CPP(extern "C" {)
189
190 #ifndef _WIN32
191 # include <sys/time.h>
192 # include <sys/wait.h>
193 # include <unistd.h>
194 #else
195 # include <io.h>
196 # define WIN32_LEAN_AND_MEAN
197 # include <windows.h>
198 # ifndef EV_SELECT_IS_WINSOCKET
199 # define EV_SELECT_IS_WINSOCKET 1
200 # endif
201 # undef EV_AVOID_STDIO
202 #endif
203
204 /* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210 #define _DARWIN_UNLIMITED_SELECT 1
211
212 /* this block tries to deduce configuration from header-defined symbols and defaults */
213
214 /* try to deduce the maximum number of signals on this platform */
215 #if defined (EV_NSIG)
216 /* use what's provided */
217 #elif defined (NSIG)
218 # define EV_NSIG (NSIG)
219 #elif defined(_NSIG)
220 # define EV_NSIG (_NSIG)
221 #elif defined (SIGMAX)
222 # define EV_NSIG (SIGMAX+1)
223 #elif defined (SIG_MAX)
224 # define EV_NSIG (SIG_MAX+1)
225 #elif defined (_SIG_MAX)
226 # define EV_NSIG (_SIG_MAX+1)
227 #elif defined (MAXSIG)
228 # define EV_NSIG (MAXSIG+1)
229 #elif defined (MAX_SIG)
230 # define EV_NSIG (MAX_SIG+1)
231 #elif defined (SIGARRAYSIZE)
232 # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233 #elif defined (_sys_nsig)
234 # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235 #else
236 # error "unable to find value for NSIG, please report"
237 /* to make it compile regardless, just remove the above line, */
238 /* but consider reporting it, too! :) */
239 # define EV_NSIG 65
240 #endif
241
242 #ifndef EV_USE_FLOOR
243 # define EV_USE_FLOOR 0
244 #endif
245
246 #ifndef EV_USE_CLOCK_SYSCALL
247 # if __linux && __GLIBC__ >= 2
248 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249 # else
250 # define EV_USE_CLOCK_SYSCALL 0
251 # endif
252 #endif
253
254 #ifndef EV_USE_MONOTONIC
255 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256 # define EV_USE_MONOTONIC EV_FEATURE_OS
257 # else
258 # define EV_USE_MONOTONIC 0
259 # endif
260 #endif
261
262 #ifndef EV_USE_REALTIME
263 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264 #endif
265
266 #ifndef EV_USE_NANOSLEEP
267 # if _POSIX_C_SOURCE >= 199309L
268 # define EV_USE_NANOSLEEP EV_FEATURE_OS
269 # else
270 # define EV_USE_NANOSLEEP 0
271 # endif
272 #endif
273
274 #ifndef EV_USE_SELECT
275 # define EV_USE_SELECT EV_FEATURE_BACKENDS
276 #endif
277
278 #ifndef EV_USE_POLL
279 # ifdef _WIN32
280 # define EV_USE_POLL 0
281 # else
282 # define EV_USE_POLL EV_FEATURE_BACKENDS
283 # endif
284 #endif
285
286 #ifndef EV_USE_EPOLL
287 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
289 # else
290 # define EV_USE_EPOLL 0
291 # endif
292 #endif
293
294 #ifndef EV_USE_KQUEUE
295 # define EV_USE_KQUEUE 0
296 #endif
297
298 #ifndef EV_USE_PORT
299 # define EV_USE_PORT 0
300 #endif
301
302 #ifndef EV_USE_INOTIFY
303 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304 # define EV_USE_INOTIFY EV_FEATURE_OS
305 # else
306 # define EV_USE_INOTIFY 0
307 # endif
308 #endif
309
310 #ifndef EV_PID_HASHSIZE
311 # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
312 #endif
313
314 #ifndef EV_INOTIFY_HASHSIZE
315 # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316 #endif
317
318 #ifndef EV_USE_EVENTFD
319 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320 # define EV_USE_EVENTFD EV_FEATURE_OS
321 # else
322 # define EV_USE_EVENTFD 0
323 # endif
324 #endif
325
326 #ifndef EV_USE_SIGNALFD
327 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328 # define EV_USE_SIGNALFD EV_FEATURE_OS
329 # else
330 # define EV_USE_SIGNALFD 0
331 # endif
332 #endif
333
334 #if 0 /* debugging */
335 # define EV_VERIFY 3
336 # define EV_USE_4HEAP 1
337 # define EV_HEAP_CACHE_AT 1
338 #endif
339
340 #ifndef EV_VERIFY
341 # define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342 #endif
343
344 #ifndef EV_USE_4HEAP
345 # define EV_USE_4HEAP EV_FEATURE_DATA
346 #endif
347
348 #ifndef EV_HEAP_CACHE_AT
349 # define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350 #endif
351
352 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353 /* which makes programs even slower. might work on other unices, too. */
354 #if EV_USE_CLOCK_SYSCALL
355 # include <syscall.h>
356 # ifdef SYS_clock_gettime
357 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358 # undef EV_USE_MONOTONIC
359 # define EV_USE_MONOTONIC 1
360 # else
361 # undef EV_USE_CLOCK_SYSCALL
362 # define EV_USE_CLOCK_SYSCALL 0
363 # endif
364 #endif
365
366 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368 #ifdef _AIX
369 /* AIX has a completely broken poll.h header */
370 # undef EV_USE_POLL
371 # define EV_USE_POLL 0
372 #endif
373
374 #ifndef CLOCK_MONOTONIC
375 # undef EV_USE_MONOTONIC
376 # define EV_USE_MONOTONIC 0
377 #endif
378
379 #ifndef CLOCK_REALTIME
380 # undef EV_USE_REALTIME
381 # define EV_USE_REALTIME 0
382 #endif
383
384 #if !EV_STAT_ENABLE
385 # undef EV_USE_INOTIFY
386 # define EV_USE_INOTIFY 0
387 #endif
388
389 #if !EV_USE_NANOSLEEP
390 /* hp-ux has it in sys/time.h, which we unconditionally include above */
391 # if !defined(_WIN32) && !defined(__hpux)
392 # include <sys/select.h>
393 # endif
394 #endif
395
396 #if EV_USE_INOTIFY
397 # include <sys/statfs.h>
398 # include <sys/inotify.h>
399 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400 # ifndef IN_DONT_FOLLOW
401 # undef EV_USE_INOTIFY
402 # define EV_USE_INOTIFY 0
403 # endif
404 #endif
405
406 #if EV_SELECT_IS_WINSOCKET
407 # include <winsock.h>
408 #endif
409
410 #if EV_USE_EVENTFD
411 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412 # include <stdint.h>
413 # ifndef EFD_NONBLOCK
414 # define EFD_NONBLOCK O_NONBLOCK
415 # endif
416 # ifndef EFD_CLOEXEC
417 # ifdef O_CLOEXEC
418 # define EFD_CLOEXEC O_CLOEXEC
419 # else
420 # define EFD_CLOEXEC 02000000
421 # endif
422 # endif
423 EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424 #endif
425
426 #if EV_USE_SIGNALFD
427 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428 # include <stdint.h>
429 # ifndef SFD_NONBLOCK
430 # define SFD_NONBLOCK O_NONBLOCK
431 # endif
432 # ifndef SFD_CLOEXEC
433 # ifdef O_CLOEXEC
434 # define SFD_CLOEXEC O_CLOEXEC
435 # else
436 # define SFD_CLOEXEC 02000000
437 # endif
438 # endif
439 EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441 struct signalfd_siginfo
442 {
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445 };
446 #endif
447
448 /**/
449
450 #if EV_VERIFY >= 3
451 # define EV_FREQUENT_CHECK ev_verify (EV_A)
452 #else
453 # define EV_FREQUENT_CHECK do { } while (0)
454 #endif
455
456 /*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460 #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461 /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
462
463 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
464 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
465
466 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
469 /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470 /* ECB.H BEGIN */
471 /*
472 * libecb - http://software.schmorp.de/pkg/libecb
473 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved.
477 *
478 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met:
480 *
481 * 1. Redistributions of source code must retain the above copyright notice,
482 * this list of conditions and the following disclaimer.
483 *
484 * 2. Redistributions in binary form must reproduce the above copyright
485 * notice, this list of conditions and the following disclaimer in the
486 * documentation and/or other materials provided with the distribution.
487 *
488 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
489 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
490 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
491 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
492 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE.
498 */
499
500 #ifndef ECB_H
501 #define ECB_H
502
503 #ifdef _WIN32
504 typedef signed char int8_t;
505 typedef unsigned char uint8_t;
506 typedef signed short int16_t;
507 typedef unsigned short uint16_t;
508 typedef signed int int32_t;
509 typedef unsigned int uint32_t;
510 #if __GNUC__
511 typedef signed long long int64_t;
512 typedef unsigned long long uint64_t;
513 #else /* _MSC_VER || __BORLANDC__ */
514 typedef signed __int64 int64_t;
515 typedef unsigned __int64 uint64_t;
516 #endif
517 #else
518 #include <inttypes.h>
519 #endif
520
521 /* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place.
527 */
528 #ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
530 #define ECB_GCC_VERSION(major,minor) 0
531 #else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
533 #endif
534 #endif
535
536 /*****************************************************************************/
537
538 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540
541 #if ECB_NO_THREADS || ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0)
543 #endif
544
545 #ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5)
547 #if __i386__
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
551 #elif __amd64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
563 #endif
564 #endif
565 #endif
566
567 #ifndef ECB_MEMORY_FENCE
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
569 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32)
578 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
580 #endif
581 #endif
582
583 #ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS
585 /*
586 * if you get undefined symbol references to pthread_mutex_lock,
587 * or failure to find pthread.h, then you should implement
588 * the ECB_MEMORY_FENCE operations for your cpu/compiler
589 * OR provide pthread.h and link against the posix thread library
590 * of your system.
591 */
592 #include <pthread.h>
593 #define ECB_NEEDS_PTHREADS 1
594 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
595
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif
599 #endif
600
601 #if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603 #endif
604
605 #if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607 #endif
608
609 /*****************************************************************************/
610
611 #define ECB_C99 (__STDC_VERSION__ >= 199901L)
612
613 #if __cplusplus
614 #define ecb_inline static inline
615 #elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__
617 #elif ECB_C99
618 #define ecb_inline static inline
619 #else
620 #define ecb_inline static
621 #endif
622
623 #if ECB_GCC_VERSION(3,3)
624 #define ecb_restrict __restrict__
625 #elif ECB_C99
626 #define ecb_restrict restrict
627 #else
628 #define ecb_restrict
629 #endif
630
631 typedef int ecb_bool;
632
633 #define ECB_CONCAT_(a, b) a ## b
634 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635 #define ECB_STRINGIFY_(a) # a
636 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
637
638 #define ecb_function_ ecb_inline
639
640 #if ECB_GCC_VERSION(3,1)
641 #define ecb_attribute(attrlist) __attribute__(attrlist)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645 #else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
648 #define ecb_expect(expr,value) (expr)
649 #define ecb_prefetch(addr,rw,locality)
650 #endif
651
652 /* no emulation for ecb_decltype */
653 #if ECB_GCC_VERSION(4,5)
654 #define ecb_decltype(x) __decltype(x)
655 #elif ECB_GCC_VERSION(3,0)
656 #define ecb_decltype(x) __typeof(x)
657 #endif
658
659 #define ecb_noinline ecb_attribute ((__noinline__))
660 #define ecb_noreturn ecb_attribute ((__noreturn__))
661 #define ecb_unused ecb_attribute ((__unused__))
662 #define ecb_const ecb_attribute ((__const__))
663 #define ecb_pure ecb_attribute ((__pure__))
664
665 #if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__))
669 #else
670 #define ecb_artificial
671 #define ecb_hot
672 #define ecb_cold
673 #endif
674
675 /* put around conditional expressions if you are very sure that the */
676 /* expression is mostly true or mostly false. note that these return */
677 /* booleans, not the expression. */
678 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
679 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
680 /* for compatibility to the rest of the world */
681 #define ecb_likely(expr) ecb_expect_true (expr)
682 #define ecb_unlikely(expr) ecb_expect_false (expr)
683
684 /* count trailing zero bits and count # of one bits */
685 #if ECB_GCC_VERSION(3,4)
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */
693 #else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
695 ecb_function_ int
696 ecb_ctz32 (uint32_t x)
697 {
698 int r = 0;
699
700 x &= ~x + 1; /* this isolates the lowest bit */
701
702 #if ECB_branchless_on_i386
703 r += !!(x & 0xaaaaaaaa) << 0;
704 r += !!(x & 0xcccccccc) << 1;
705 r += !!(x & 0xf0f0f0f0) << 2;
706 r += !!(x & 0xff00ff00) << 3;
707 r += !!(x & 0xffff0000) << 4;
708 #else
709 if (x & 0xaaaaaaaa) r += 1;
710 if (x & 0xcccccccc) r += 2;
711 if (x & 0xf0f0f0f0) r += 4;
712 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16;
714 #endif
715
716 return r;
717 }
718
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
720 ecb_function_ int
721 ecb_ctz64 (uint64_t x)
722 {
723 int shift = x & 0xffffffffU ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift;
725 }
726
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
728 ecb_function_ int
729 ecb_popcount32 (uint32_t x)
730 {
731 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101;
735
736 return x >> 24;
737 }
738
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
740 ecb_function_ int ecb_ld32 (uint32_t x)
741 {
742 int r = 0;
743
744 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; }
749
750 return r;
751 }
752
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
754 ecb_function_ int ecb_ld64 (uint64_t x)
755 {
756 int r = 0;
757
758 if (x >> 32) { x >>= 32; r += 32; }
759
760 return r + ecb_ld32 (x);
761 }
762 #endif
763
764 /* popcount64 is only available on 64 bit cpus as gcc builtin */
765 /* so for this version we are lazy */
766 ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
767 ecb_function_ int
768 ecb_popcount64 (uint64_t x)
769 {
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771 }
772
773 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
774 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
775 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
776 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
777 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
778 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
779 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
780 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
781
782 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790
791 #if ECB_GCC_VERSION(4,3)
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
793 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x)
795 #else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
797 ecb_function_ uint16_t
798 ecb_bswap16 (uint16_t x)
799 {
800 return ecb_rotl16 (x, 8);
801 }
802
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
804 ecb_function_ uint32_t
805 ecb_bswap32 (uint32_t x)
806 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 }
809
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
811 ecb_function_ uint64_t
812 ecb_bswap64 (uint64_t x)
813 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 }
816 #endif
817
818 #if ECB_GCC_VERSION(4,5)
819 #define ecb_unreachable() __builtin_unreachable ()
820 #else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
823 ecb_function_ void ecb_unreachable (void) { }
824 #endif
825
826 /* try to tell the compiler that some condition is definitely true */
827 #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
828
829 ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
830 ecb_function_ unsigned char
831 ecb_byteorder_helper (void)
832 {
833 const uint32_t u = 0x11223344;
834 return *(unsigned char *)&u;
835 }
836
837 ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
838 ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
839 ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
840 ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
841
842 #if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844 #else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
846 #endif
847
848 #if ecb_cplusplus_does_not_suck
849 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
850 template<typename T, int N>
851 static inline int ecb_array_length (const T (&arr)[N])
852 {
853 return N;
854 }
855 #else
856 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
857 #endif
858
859 #endif
860
861 /* ECB.H END */
862
863 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
864 # undef ECB_MEMORY_FENCE
865 # undef ECB_MEMORY_FENCE_ACQUIRE
866 # undef ECB_MEMORY_FENCE_RELEASE
867 #endif
868
869 #define expect_false(cond) ecb_expect_false (cond)
870 #define expect_true(cond) ecb_expect_true (cond)
871 #define noinline ecb_noinline
872
873 #define inline_size ecb_inline
874
875 #if EV_FEATURE_CODE
876 # define inline_speed ecb_inline
877 #else
878 # define inline_speed static noinline
879 #endif
880
881 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
882
883 #if EV_MINPRI == EV_MAXPRI
884 # define ABSPRI(w) (((W)w), 0)
885 #else
886 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
887 #endif
888
889 #define EMPTY /* required for microsofts broken pseudo-c compiler */
890 #define EMPTY2(a,b) /* used to suppress some warnings */
891
892 typedef ev_watcher *W;
893 typedef ev_watcher_list *WL;
894 typedef ev_watcher_time *WT;
895
896 #define ev_active(w) ((W)(w))->active
897 #define ev_at(w) ((WT)(w))->at
898
899 #if EV_USE_REALTIME
900 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
901 /* giving it a reasonably high chance of working on typical architectures */
902 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
903 #endif
904
905 #if EV_USE_MONOTONIC
906 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
907 #endif
908
909 #ifndef EV_FD_TO_WIN32_HANDLE
910 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
911 #endif
912 #ifndef EV_WIN32_HANDLE_TO_FD
913 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
914 #endif
915 #ifndef EV_WIN32_CLOSE_FD
916 # define EV_WIN32_CLOSE_FD(fd) close (fd)
917 #endif
918
919 #ifdef _WIN32
920 # include "ev_win32.c"
921 #endif
922
923 /*****************************************************************************/
924
925 /* define a suitable floor function (only used by periodics atm) */
926
927 #if EV_USE_FLOOR
928 # include <math.h>
929 # define ev_floor(v) floor (v)
930 #else
931
932 #include <float.h>
933
934 /* a floor() replacement function, should be independent of ev_tstamp type */
935 static ev_tstamp noinline
936 ev_floor (ev_tstamp v)
937 {
938 /* the choice of shift factor is not terribly important */
939 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
940 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
941 #else
942 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
943 #endif
944
945 /* argument too large for an unsigned long? */
946 if (expect_false (v >= shift))
947 {
948 ev_tstamp f;
949
950 if (v == v - 1.)
951 return v; /* very large number */
952
953 f = shift * ev_floor (v * (1. / shift));
954 return f + ev_floor (v - f);
955 }
956
957 /* special treatment for negative args? */
958 if (expect_false (v < 0.))
959 {
960 ev_tstamp f = -ev_floor (-v);
961
962 return f - (f == v ? 0 : 1);
963 }
964
965 /* fits into an unsigned long */
966 return (unsigned long)v;
967 }
968
969 #endif
970
971 /*****************************************************************************/
972
973 #ifdef __linux
974 # include <sys/utsname.h>
975 #endif
976
977 static unsigned int noinline ecb_cold
978 ev_linux_version (void)
979 {
980 #ifdef __linux
981 unsigned int v = 0;
982 struct utsname buf;
983 int i;
984 char *p = buf.release;
985
986 if (uname (&buf))
987 return 0;
988
989 for (i = 3+1; --i; )
990 {
991 unsigned int c = 0;
992
993 for (;;)
994 {
995 if (*p >= '0' && *p <= '9')
996 c = c * 10 + *p++ - '0';
997 else
998 {
999 p += *p == '.';
1000 break;
1001 }
1002 }
1003
1004 v = (v << 8) | c;
1005 }
1006
1007 return v;
1008 #else
1009 return 0;
1010 #endif
1011 }
1012
1013 /*****************************************************************************/
1014
1015 #if EV_AVOID_STDIO
1016 static void noinline ecb_cold
1017 ev_printerr (const char *msg)
1018 {
1019 write (STDERR_FILENO, msg, strlen (msg));
1020 }
1021 #endif
1022
1023 static void (*syserr_cb)(const char *msg);
1024
1025 void ecb_cold
1026 ev_set_syserr_cb (void (*cb)(const char *msg))
1027 {
1028 syserr_cb = cb;
1029 }
1030
1031 static void noinline ecb_cold
1032 ev_syserr (const char *msg)
1033 {
1034 if (!msg)
1035 msg = "(libev) system error";
1036
1037 if (syserr_cb)
1038 syserr_cb (msg);
1039 else
1040 {
1041 #if EV_AVOID_STDIO
1042 ev_printerr (msg);
1043 ev_printerr (": ");
1044 ev_printerr (strerror (errno));
1045 ev_printerr ("\n");
1046 #else
1047 perror (msg);
1048 #endif
1049 abort ();
1050 }
1051 }
1052
1053 static void *
1054 ev_realloc_emul (void *ptr, long size)
1055 {
1056 #if __GLIBC__
1057 return realloc (ptr, size);
1058 #else
1059 /* some systems, notably openbsd and darwin, fail to properly
1060 * implement realloc (x, 0) (as required by both ansi c-89 and
1061 * the single unix specification, so work around them here.
1062 */
1063
1064 if (size)
1065 return realloc (ptr, size);
1066
1067 free (ptr);
1068 return 0;
1069 #endif
1070 }
1071
1072 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
1073
1074 void ecb_cold
1075 ev_set_allocator (void *(*cb)(void *ptr, long size))
1076 {
1077 alloc = cb;
1078 }
1079
1080 inline_speed void *
1081 ev_realloc (void *ptr, long size)
1082 {
1083 ptr = alloc (ptr, size);
1084
1085 if (!ptr && size)
1086 {
1087 #if EV_AVOID_STDIO
1088 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1089 #else
1090 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1091 #endif
1092 abort ();
1093 }
1094
1095 return ptr;
1096 }
1097
1098 #define ev_malloc(size) ev_realloc (0, (size))
1099 #define ev_free(ptr) ev_realloc ((ptr), 0)
1100
1101 /*****************************************************************************/
1102
1103 /* set in reify when reification needed */
1104 #define EV_ANFD_REIFY 1
1105
1106 /* file descriptor info structure */
1107 typedef struct
1108 {
1109 WL head;
1110 unsigned char events; /* the events watched for */
1111 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1112 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1113 unsigned char unused;
1114 #if EV_USE_EPOLL
1115 unsigned int egen; /* generation counter to counter epoll bugs */
1116 #endif
1117 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1118 SOCKET handle;
1119 #endif
1120 #if EV_USE_IOCP
1121 OVERLAPPED or, ow;
1122 #endif
1123 } ANFD;
1124
1125 /* stores the pending event set for a given watcher */
1126 typedef struct
1127 {
1128 W w;
1129 int events; /* the pending event set for the given watcher */
1130 } ANPENDING;
1131
1132 #if EV_USE_INOTIFY
1133 /* hash table entry per inotify-id */
1134 typedef struct
1135 {
1136 WL head;
1137 } ANFS;
1138 #endif
1139
1140 /* Heap Entry */
1141 #if EV_HEAP_CACHE_AT
1142 /* a heap element */
1143 typedef struct {
1144 ev_tstamp at;
1145 WT w;
1146 } ANHE;
1147
1148 #define ANHE_w(he) (he).w /* access watcher, read-write */
1149 #define ANHE_at(he) (he).at /* access cached at, read-only */
1150 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1151 #else
1152 /* a heap element */
1153 typedef WT ANHE;
1154
1155 #define ANHE_w(he) (he)
1156 #define ANHE_at(he) (he)->at
1157 #define ANHE_at_cache(he)
1158 #endif
1159
1160 #if EV_MULTIPLICITY
1161
1162 struct ev_loop
1163 {
1164 ev_tstamp ev_rt_now;
1165 #define ev_rt_now ((loop)->ev_rt_now)
1166 #define VAR(name,decl) decl;
1167 #include "ev_vars.h"
1168 #undef VAR
1169 };
1170 #include "ev_wrap.h"
1171
1172 static struct ev_loop default_loop_struct;
1173 struct ev_loop *ev_default_loop_ptr;
1174
1175 #else
1176
1177 ev_tstamp ev_rt_now;
1178 #define VAR(name,decl) static decl;
1179 #include "ev_vars.h"
1180 #undef VAR
1181
1182 static int ev_default_loop_ptr;
1183
1184 #endif
1185
1186 #if EV_FEATURE_API
1187 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1188 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1189 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1190 #else
1191 # define EV_RELEASE_CB (void)0
1192 # define EV_ACQUIRE_CB (void)0
1193 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1194 #endif
1195
1196 #define EVBREAK_RECURSE 0x80
1197
1198 /*****************************************************************************/
1199
1200 #ifndef EV_HAVE_EV_TIME
1201 ev_tstamp
1202 ev_time (void)
1203 {
1204 #if EV_USE_REALTIME
1205 if (expect_true (have_realtime))
1206 {
1207 struct timespec ts;
1208 clock_gettime (CLOCK_REALTIME, &ts);
1209 return ts.tv_sec + ts.tv_nsec * 1e-9;
1210 }
1211 #endif
1212
1213 struct timeval tv;
1214 gettimeofday (&tv, 0);
1215 return tv.tv_sec + tv.tv_usec * 1e-6;
1216 }
1217 #endif
1218
1219 inline_size ev_tstamp
1220 get_clock (void)
1221 {
1222 #if EV_USE_MONOTONIC
1223 if (expect_true (have_monotonic))
1224 {
1225 struct timespec ts;
1226 clock_gettime (CLOCK_MONOTONIC, &ts);
1227 return ts.tv_sec + ts.tv_nsec * 1e-9;
1228 }
1229 #endif
1230
1231 return ev_time ();
1232 }
1233
1234 #if EV_MULTIPLICITY
1235 ev_tstamp
1236 ev_now (EV_P)
1237 {
1238 return ev_rt_now;
1239 }
1240 #endif
1241
1242 void
1243 ev_sleep (ev_tstamp delay)
1244 {
1245 if (delay > 0.)
1246 {
1247 #if EV_USE_NANOSLEEP
1248 struct timespec ts;
1249
1250 EV_TS_SET (ts, delay);
1251 nanosleep (&ts, 0);
1252 #elif defined(_WIN32)
1253 Sleep ((unsigned long)(delay * 1e3));
1254 #else
1255 struct timeval tv;
1256
1257 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1258 /* something not guaranteed by newer posix versions, but guaranteed */
1259 /* by older ones */
1260 EV_TV_SET (tv, delay);
1261 select (0, 0, 0, 0, &tv);
1262 #endif
1263 }
1264 }
1265
1266 /*****************************************************************************/
1267
1268 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1269
1270 /* find a suitable new size for the given array, */
1271 /* hopefully by rounding to a nice-to-malloc size */
1272 inline_size int
1273 array_nextsize (int elem, int cur, int cnt)
1274 {
1275 int ncur = cur + 1;
1276
1277 do
1278 ncur <<= 1;
1279 while (cnt > ncur);
1280
1281 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
1282 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1283 {
1284 ncur *= elem;
1285 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1286 ncur = ncur - sizeof (void *) * 4;
1287 ncur /= elem;
1288 }
1289
1290 return ncur;
1291 }
1292
1293 static void * noinline ecb_cold
1294 array_realloc (int elem, void *base, int *cur, int cnt)
1295 {
1296 *cur = array_nextsize (elem, *cur, cnt);
1297 return ev_realloc (base, elem * *cur);
1298 }
1299
1300 #define array_init_zero(base,count) \
1301 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1302
1303 #define array_needsize(type,base,cur,cnt,init) \
1304 if (expect_false ((cnt) > (cur))) \
1305 { \
1306 int ecb_unused ocur_ = (cur); \
1307 (base) = (type *)array_realloc \
1308 (sizeof (type), (base), &(cur), (cnt)); \
1309 init ((base) + (ocur_), (cur) - ocur_); \
1310 }
1311
1312 #if 0
1313 #define array_slim(type,stem) \
1314 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1315 { \
1316 stem ## max = array_roundsize (stem ## cnt >> 1); \
1317 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1318 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1319 }
1320 #endif
1321
1322 #define array_free(stem, idx) \
1323 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1324
1325 /*****************************************************************************/
1326
1327 /* dummy callback for pending events */
1328 static void noinline
1329 pendingcb (EV_P_ ev_prepare *w, int revents)
1330 {
1331 }
1332
1333 void noinline
1334 ev_feed_event (EV_P_ void *w, int revents)
1335 {
1336 W w_ = (W)w;
1337 int pri = ABSPRI (w_);
1338
1339 if (expect_false (w_->pending))
1340 pendings [pri][w_->pending - 1].events |= revents;
1341 else
1342 {
1343 w_->pending = ++pendingcnt [pri];
1344 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1345 pendings [pri][w_->pending - 1].w = w_;
1346 pendings [pri][w_->pending - 1].events = revents;
1347 }
1348 }
1349
1350 inline_speed void
1351 feed_reverse (EV_P_ W w)
1352 {
1353 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1354 rfeeds [rfeedcnt++] = w;
1355 }
1356
1357 inline_size void
1358 feed_reverse_done (EV_P_ int revents)
1359 {
1360 do
1361 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1362 while (rfeedcnt);
1363 }
1364
1365 inline_speed void
1366 queue_events (EV_P_ W *events, int eventcnt, int type)
1367 {
1368 int i;
1369
1370 for (i = 0; i < eventcnt; ++i)
1371 ev_feed_event (EV_A_ events [i], type);
1372 }
1373
1374 /*****************************************************************************/
1375
1376 inline_speed void
1377 fd_event_nocheck (EV_P_ int fd, int revents)
1378 {
1379 ANFD *anfd = anfds + fd;
1380 ev_io *w;
1381
1382 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1383 {
1384 int ev = w->events & revents;
1385
1386 if (ev)
1387 ev_feed_event (EV_A_ (W)w, ev);
1388 }
1389 }
1390
1391 /* do not submit kernel events for fds that have reify set */
1392 /* because that means they changed while we were polling for new events */
1393 inline_speed void
1394 fd_event (EV_P_ int fd, int revents)
1395 {
1396 ANFD *anfd = anfds + fd;
1397
1398 if (expect_true (!anfd->reify))
1399 fd_event_nocheck (EV_A_ fd, revents);
1400 }
1401
1402 void
1403 ev_feed_fd_event (EV_P_ int fd, int revents)
1404 {
1405 if (fd >= 0 && fd < anfdmax)
1406 fd_event_nocheck (EV_A_ fd, revents);
1407 }
1408
1409 /* make sure the external fd watch events are in-sync */
1410 /* with the kernel/libev internal state */
1411 inline_size void
1412 fd_reify (EV_P)
1413 {
1414 int i;
1415
1416 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1417 for (i = 0; i < fdchangecnt; ++i)
1418 {
1419 int fd = fdchanges [i];
1420 ANFD *anfd = anfds + fd;
1421
1422 if (anfd->reify & EV__IOFDSET && anfd->head)
1423 {
1424 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1425
1426 if (handle != anfd->handle)
1427 {
1428 unsigned long arg;
1429
1430 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1431
1432 /* handle changed, but fd didn't - we need to do it in two steps */
1433 backend_modify (EV_A_ fd, anfd->events, 0);
1434 anfd->events = 0;
1435 anfd->handle = handle;
1436 }
1437 }
1438 }
1439 #endif
1440
1441 for (i = 0; i < fdchangecnt; ++i)
1442 {
1443 int fd = fdchanges [i];
1444 ANFD *anfd = anfds + fd;
1445 ev_io *w;
1446
1447 unsigned char o_events = anfd->events;
1448 unsigned char o_reify = anfd->reify;
1449
1450 anfd->reify = 0;
1451
1452 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1453 {
1454 anfd->events = 0;
1455
1456 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1457 anfd->events |= (unsigned char)w->events;
1458
1459 if (o_events != anfd->events)
1460 o_reify = EV__IOFDSET; /* actually |= */
1461 }
1462
1463 if (o_reify & EV__IOFDSET)
1464 backend_modify (EV_A_ fd, o_events, anfd->events);
1465 }
1466
1467 fdchangecnt = 0;
1468 }
1469
1470 /* something about the given fd changed */
1471 inline_size void
1472 fd_change (EV_P_ int fd, int flags)
1473 {
1474 unsigned char reify = anfds [fd].reify;
1475 anfds [fd].reify |= flags;
1476
1477 if (expect_true (!reify))
1478 {
1479 ++fdchangecnt;
1480 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1481 fdchanges [fdchangecnt - 1] = fd;
1482 }
1483 }
1484
1485 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1486 inline_speed void ecb_cold
1487 fd_kill (EV_P_ int fd)
1488 {
1489 ev_io *w;
1490
1491 while ((w = (ev_io *)anfds [fd].head))
1492 {
1493 ev_io_stop (EV_A_ w);
1494 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1495 }
1496 }
1497
1498 /* check whether the given fd is actually valid, for error recovery */
1499 inline_size int ecb_cold
1500 fd_valid (int fd)
1501 {
1502 #ifdef _WIN32
1503 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1504 #else
1505 return fcntl (fd, F_GETFD) != -1;
1506 #endif
1507 }
1508
1509 /* called on EBADF to verify fds */
1510 static void noinline ecb_cold
1511 fd_ebadf (EV_P)
1512 {
1513 int fd;
1514
1515 for (fd = 0; fd < anfdmax; ++fd)
1516 if (anfds [fd].events)
1517 if (!fd_valid (fd) && errno == EBADF)
1518 fd_kill (EV_A_ fd);
1519 }
1520
1521 /* called on ENOMEM in select/poll to kill some fds and retry */
1522 static void noinline ecb_cold
1523 fd_enomem (EV_P)
1524 {
1525 int fd;
1526
1527 for (fd = anfdmax; fd--; )
1528 if (anfds [fd].events)
1529 {
1530 fd_kill (EV_A_ fd);
1531 break;
1532 }
1533 }
1534
1535 /* usually called after fork if backend needs to re-arm all fds from scratch */
1536 static void noinline
1537 fd_rearm_all (EV_P)
1538 {
1539 int fd;
1540
1541 for (fd = 0; fd < anfdmax; ++fd)
1542 if (anfds [fd].events)
1543 {
1544 anfds [fd].events = 0;
1545 anfds [fd].emask = 0;
1546 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1547 }
1548 }
1549
1550 /* used to prepare libev internal fd's */
1551 /* this is not fork-safe */
1552 inline_speed void
1553 fd_intern (int fd)
1554 {
1555 #ifdef _WIN32
1556 unsigned long arg = 1;
1557 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1558 #else
1559 fcntl (fd, F_SETFD, FD_CLOEXEC);
1560 fcntl (fd, F_SETFL, O_NONBLOCK);
1561 #endif
1562 }
1563
1564 /*****************************************************************************/
1565
1566 /*
1567 * the heap functions want a real array index. array index 0 is guaranteed to not
1568 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1569 * the branching factor of the d-tree.
1570 */
1571
1572 /*
1573 * at the moment we allow libev the luxury of two heaps,
1574 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1575 * which is more cache-efficient.
1576 * the difference is about 5% with 50000+ watchers.
1577 */
1578 #if EV_USE_4HEAP
1579
1580 #define DHEAP 4
1581 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1582 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1583 #define UPHEAP_DONE(p,k) ((p) == (k))
1584
1585 /* away from the root */
1586 inline_speed void
1587 downheap (ANHE *heap, int N, int k)
1588 {
1589 ANHE he = heap [k];
1590 ANHE *E = heap + N + HEAP0;
1591
1592 for (;;)
1593 {
1594 ev_tstamp minat;
1595 ANHE *minpos;
1596 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1597
1598 /* find minimum child */
1599 if (expect_true (pos + DHEAP - 1 < E))
1600 {
1601 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1602 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1603 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1604 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1605 }
1606 else if (pos < E)
1607 {
1608 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1609 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1610 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1611 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1612 }
1613 else
1614 break;
1615
1616 if (ANHE_at (he) <= minat)
1617 break;
1618
1619 heap [k] = *minpos;
1620 ev_active (ANHE_w (*minpos)) = k;
1621
1622 k = minpos - heap;
1623 }
1624
1625 heap [k] = he;
1626 ev_active (ANHE_w (he)) = k;
1627 }
1628
1629 #else /* 4HEAP */
1630
1631 #define HEAP0 1
1632 #define HPARENT(k) ((k) >> 1)
1633 #define UPHEAP_DONE(p,k) (!(p))
1634
1635 /* away from the root */
1636 inline_speed void
1637 downheap (ANHE *heap, int N, int k)
1638 {
1639 ANHE he = heap [k];
1640
1641 for (;;)
1642 {
1643 int c = k << 1;
1644
1645 if (c >= N + HEAP0)
1646 break;
1647
1648 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1649 ? 1 : 0;
1650
1651 if (ANHE_at (he) <= ANHE_at (heap [c]))
1652 break;
1653
1654 heap [k] = heap [c];
1655 ev_active (ANHE_w (heap [k])) = k;
1656
1657 k = c;
1658 }
1659
1660 heap [k] = he;
1661 ev_active (ANHE_w (he)) = k;
1662 }
1663 #endif
1664
1665 /* towards the root */
1666 inline_speed void
1667 upheap (ANHE *heap, int k)
1668 {
1669 ANHE he = heap [k];
1670
1671 for (;;)
1672 {
1673 int p = HPARENT (k);
1674
1675 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1676 break;
1677
1678 heap [k] = heap [p];
1679 ev_active (ANHE_w (heap [k])) = k;
1680 k = p;
1681 }
1682
1683 heap [k] = he;
1684 ev_active (ANHE_w (he)) = k;
1685 }
1686
1687 /* move an element suitably so it is in a correct place */
1688 inline_size void
1689 adjustheap (ANHE *heap, int N, int k)
1690 {
1691 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1692 upheap (heap, k);
1693 else
1694 downheap (heap, N, k);
1695 }
1696
1697 /* rebuild the heap: this function is used only once and executed rarely */
1698 inline_size void
1699 reheap (ANHE *heap, int N)
1700 {
1701 int i;
1702
1703 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1704 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1705 for (i = 0; i < N; ++i)
1706 upheap (heap, i + HEAP0);
1707 }
1708
1709 /*****************************************************************************/
1710
1711 /* associate signal watchers to a signal signal */
1712 typedef struct
1713 {
1714 EV_ATOMIC_T pending;
1715 #if EV_MULTIPLICITY
1716 EV_P;
1717 #endif
1718 WL head;
1719 } ANSIG;
1720
1721 static ANSIG signals [EV_NSIG - 1];
1722
1723 /*****************************************************************************/
1724
1725 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1726
1727 static void noinline ecb_cold
1728 evpipe_init (EV_P)
1729 {
1730 if (!ev_is_active (&pipe_w))
1731 {
1732 # if EV_USE_EVENTFD
1733 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1734 if (evfd < 0 && errno == EINVAL)
1735 evfd = eventfd (0, 0);
1736
1737 if (evfd >= 0)
1738 {
1739 evpipe [0] = -1;
1740 fd_intern (evfd); /* doing it twice doesn't hurt */
1741 ev_io_set (&pipe_w, evfd, EV_READ);
1742 }
1743 else
1744 # endif
1745 {
1746 while (pipe (evpipe))
1747 ev_syserr ("(libev) error creating signal/async pipe");
1748
1749 fd_intern (evpipe [0]);
1750 fd_intern (evpipe [1]);
1751 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1752 }
1753
1754 ev_io_start (EV_A_ &pipe_w);
1755 ev_unref (EV_A); /* watcher should not keep loop alive */
1756 }
1757 }
1758
1759 inline_speed void
1760 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1761 {
1762 if (expect_true (*flag))
1763 return;
1764
1765 *flag = 1;
1766
1767 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1768
1769 pipe_write_skipped = 1;
1770
1771 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1772
1773 if (pipe_write_wanted)
1774 {
1775 int old_errno;
1776
1777 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1778
1779 old_errno = errno; /* save errno because write will clobber it */
1780
1781 #if EV_USE_EVENTFD
1782 if (evfd >= 0)
1783 {
1784 uint64_t counter = 1;
1785 write (evfd, &counter, sizeof (uint64_t));
1786 }
1787 else
1788 #endif
1789 {
1790 /* win32 people keep sending patches that change this write() to send() */
1791 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1792 /* so when you think this write should be a send instead, please find out */
1793 /* where your send() is from - it's definitely not the microsoft send, and */
1794 /* tell me. thank you. */
1795 write (evpipe [1], &(evpipe [1]), 1);
1796 }
1797
1798 errno = old_errno;
1799 }
1800 }
1801
1802 /* called whenever the libev signal pipe */
1803 /* got some events (signal, async) */
1804 static void
1805 pipecb (EV_P_ ev_io *iow, int revents)
1806 {
1807 int i;
1808
1809 if (revents & EV_READ)
1810 {
1811 #if EV_USE_EVENTFD
1812 if (evfd >= 0)
1813 {
1814 uint64_t counter;
1815 read (evfd, &counter, sizeof (uint64_t));
1816 }
1817 else
1818 #endif
1819 {
1820 char dummy;
1821 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1822 read (evpipe [0], &dummy, 1);
1823 }
1824 }
1825
1826 pipe_write_skipped = 0;
1827
1828 #if EV_SIGNAL_ENABLE
1829 if (sig_pending)
1830 {
1831 sig_pending = 0;
1832
1833 for (i = EV_NSIG - 1; i--; )
1834 if (expect_false (signals [i].pending))
1835 ev_feed_signal_event (EV_A_ i + 1);
1836 }
1837 #endif
1838
1839 #if EV_ASYNC_ENABLE
1840 if (async_pending)
1841 {
1842 async_pending = 0;
1843
1844 for (i = asynccnt; i--; )
1845 if (asyncs [i]->sent)
1846 {
1847 asyncs [i]->sent = 0;
1848 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1849 }
1850 }
1851 #endif
1852 }
1853
1854 /*****************************************************************************/
1855
1856 void
1857 ev_feed_signal (int signum)
1858 {
1859 #if EV_MULTIPLICITY
1860 EV_P = signals [signum - 1].loop;
1861
1862 if (!EV_A)
1863 return;
1864 #endif
1865
1866 if (!ev_active (&pipe_w))
1867 return;
1868
1869 signals [signum - 1].pending = 1;
1870 evpipe_write (EV_A_ &sig_pending);
1871 }
1872
1873 static void
1874 ev_sighandler (int signum)
1875 {
1876 #ifdef _WIN32
1877 signal (signum, ev_sighandler);
1878 #endif
1879
1880 ev_feed_signal (signum);
1881 }
1882
1883 void noinline
1884 ev_feed_signal_event (EV_P_ int signum)
1885 {
1886 WL w;
1887
1888 if (expect_false (signum <= 0 || signum > EV_NSIG))
1889 return;
1890
1891 --signum;
1892
1893 #if EV_MULTIPLICITY
1894 /* it is permissible to try to feed a signal to the wrong loop */
1895 /* or, likely more useful, feeding a signal nobody is waiting for */
1896
1897 if (expect_false (signals [signum].loop != EV_A))
1898 return;
1899 #endif
1900
1901 signals [signum].pending = 0;
1902
1903 for (w = signals [signum].head; w; w = w->next)
1904 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1905 }
1906
1907 #if EV_USE_SIGNALFD
1908 static void
1909 sigfdcb (EV_P_ ev_io *iow, int revents)
1910 {
1911 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1912
1913 for (;;)
1914 {
1915 ssize_t res = read (sigfd, si, sizeof (si));
1916
1917 /* not ISO-C, as res might be -1, but works with SuS */
1918 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1919 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1920
1921 if (res < (ssize_t)sizeof (si))
1922 break;
1923 }
1924 }
1925 #endif
1926
1927 #endif
1928
1929 /*****************************************************************************/
1930
1931 #if EV_CHILD_ENABLE
1932 static WL childs [EV_PID_HASHSIZE];
1933
1934 static ev_signal childev;
1935
1936 #ifndef WIFCONTINUED
1937 # define WIFCONTINUED(status) 0
1938 #endif
1939
1940 /* handle a single child status event */
1941 inline_speed void
1942 child_reap (EV_P_ int chain, int pid, int status)
1943 {
1944 ev_child *w;
1945 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1946
1947 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1948 {
1949 if ((w->pid == pid || !w->pid)
1950 && (!traced || (w->flags & 1)))
1951 {
1952 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1953 w->rpid = pid;
1954 w->rstatus = status;
1955 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1956 }
1957 }
1958 }
1959
1960 #ifndef WCONTINUED
1961 # define WCONTINUED 0
1962 #endif
1963
1964 /* called on sigchld etc., calls waitpid */
1965 static void
1966 childcb (EV_P_ ev_signal *sw, int revents)
1967 {
1968 int pid, status;
1969
1970 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1971 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1972 if (!WCONTINUED
1973 || errno != EINVAL
1974 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1975 return;
1976
1977 /* make sure we are called again until all children have been reaped */
1978 /* we need to do it this way so that the callback gets called before we continue */
1979 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1980
1981 child_reap (EV_A_ pid, pid, status);
1982 if ((EV_PID_HASHSIZE) > 1)
1983 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1984 }
1985
1986 #endif
1987
1988 /*****************************************************************************/
1989
1990 #if EV_USE_IOCP
1991 # include "ev_iocp.c"
1992 #endif
1993 #if EV_USE_PORT
1994 # include "ev_port.c"
1995 #endif
1996 #if EV_USE_KQUEUE
1997 # include "ev_kqueue.c"
1998 #endif
1999 #if EV_USE_EPOLL
2000 # include "ev_epoll.c"
2001 #endif
2002 #if EV_USE_POLL
2003 # include "ev_poll.c"
2004 #endif
2005 #if EV_USE_SELECT
2006 # include "ev_select.c"
2007 #endif
2008
2009 int ecb_cold
2010 ev_version_major (void)
2011 {
2012 return EV_VERSION_MAJOR;
2013 }
2014
2015 int ecb_cold
2016 ev_version_minor (void)
2017 {
2018 return EV_VERSION_MINOR;
2019 }
2020
2021 /* return true if we are running with elevated privileges and should ignore env variables */
2022 int inline_size ecb_cold
2023 enable_secure (void)
2024 {
2025 #ifdef _WIN32
2026 return 0;
2027 #else
2028 return getuid () != geteuid ()
2029 || getgid () != getegid ();
2030 #endif
2031 }
2032
2033 unsigned int ecb_cold
2034 ev_supported_backends (void)
2035 {
2036 unsigned int flags = 0;
2037
2038 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2039 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2040 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2041 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2042 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2043
2044 return flags;
2045 }
2046
2047 unsigned int ecb_cold
2048 ev_recommended_backends (void)
2049 {
2050 unsigned int flags = ev_supported_backends ();
2051
2052 #ifndef __NetBSD__
2053 /* kqueue is borked on everything but netbsd apparently */
2054 /* it usually doesn't work correctly on anything but sockets and pipes */
2055 flags &= ~EVBACKEND_KQUEUE;
2056 #endif
2057 #ifdef __APPLE__
2058 /* only select works correctly on that "unix-certified" platform */
2059 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2060 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2061 #endif
2062 #ifdef __FreeBSD__
2063 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2064 #endif
2065
2066 return flags;
2067 }
2068
2069 unsigned int ecb_cold
2070 ev_embeddable_backends (void)
2071 {
2072 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2073
2074 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2075 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2076 flags &= ~EVBACKEND_EPOLL;
2077
2078 return flags;
2079 }
2080
2081 unsigned int
2082 ev_backend (EV_P)
2083 {
2084 return backend;
2085 }
2086
2087 #if EV_FEATURE_API
2088 unsigned int
2089 ev_iteration (EV_P)
2090 {
2091 return loop_count;
2092 }
2093
2094 unsigned int
2095 ev_depth (EV_P)
2096 {
2097 return loop_depth;
2098 }
2099
2100 void
2101 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2102 {
2103 io_blocktime = interval;
2104 }
2105
2106 void
2107 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2108 {
2109 timeout_blocktime = interval;
2110 }
2111
2112 void
2113 ev_set_userdata (EV_P_ void *data)
2114 {
2115 userdata = data;
2116 }
2117
2118 void *
2119 ev_userdata (EV_P)
2120 {
2121 return userdata;
2122 }
2123
2124 void
2125 ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2126 {
2127 invoke_cb = invoke_pending_cb;
2128 }
2129
2130 void
2131 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2132 {
2133 release_cb = release;
2134 acquire_cb = acquire;
2135 }
2136 #endif
2137
2138 /* initialise a loop structure, must be zero-initialised */
2139 static void noinline ecb_cold
2140 loop_init (EV_P_ unsigned int flags)
2141 {
2142 if (!backend)
2143 {
2144 origflags = flags;
2145
2146 #if EV_USE_REALTIME
2147 if (!have_realtime)
2148 {
2149 struct timespec ts;
2150
2151 if (!clock_gettime (CLOCK_REALTIME, &ts))
2152 have_realtime = 1;
2153 }
2154 #endif
2155
2156 #if EV_USE_MONOTONIC
2157 if (!have_monotonic)
2158 {
2159 struct timespec ts;
2160
2161 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2162 have_monotonic = 1;
2163 }
2164 #endif
2165
2166 /* pid check not overridable via env */
2167 #ifndef _WIN32
2168 if (flags & EVFLAG_FORKCHECK)
2169 curpid = getpid ();
2170 #endif
2171
2172 if (!(flags & EVFLAG_NOENV)
2173 && !enable_secure ()
2174 && getenv ("LIBEV_FLAGS"))
2175 flags = atoi (getenv ("LIBEV_FLAGS"));
2176
2177 ev_rt_now = ev_time ();
2178 mn_now = get_clock ();
2179 now_floor = mn_now;
2180 rtmn_diff = ev_rt_now - mn_now;
2181 #if EV_FEATURE_API
2182 invoke_cb = ev_invoke_pending;
2183 #endif
2184
2185 io_blocktime = 0.;
2186 timeout_blocktime = 0.;
2187 backend = 0;
2188 backend_fd = -1;
2189 sig_pending = 0;
2190 #if EV_ASYNC_ENABLE
2191 async_pending = 0;
2192 #endif
2193 pipe_write_skipped = 0;
2194 pipe_write_wanted = 0;
2195 #if EV_USE_INOTIFY
2196 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2197 #endif
2198 #if EV_USE_SIGNALFD
2199 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2200 #endif
2201
2202 if (!(flags & EVBACKEND_MASK))
2203 flags |= ev_recommended_backends ();
2204
2205 #if EV_USE_IOCP
2206 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2207 #endif
2208 #if EV_USE_PORT
2209 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2210 #endif
2211 #if EV_USE_KQUEUE
2212 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2213 #endif
2214 #if EV_USE_EPOLL
2215 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2216 #endif
2217 #if EV_USE_POLL
2218 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2219 #endif
2220 #if EV_USE_SELECT
2221 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2222 #endif
2223
2224 ev_prepare_init (&pending_w, pendingcb);
2225
2226 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2227 ev_init (&pipe_w, pipecb);
2228 ev_set_priority (&pipe_w, EV_MAXPRI);
2229 #endif
2230 }
2231 }
2232
2233 /* free up a loop structure */
2234 void ecb_cold
2235 ev_loop_destroy (EV_P)
2236 {
2237 int i;
2238
2239 #if EV_MULTIPLICITY
2240 /* mimic free (0) */
2241 if (!EV_A)
2242 return;
2243 #endif
2244
2245 #if EV_CLEANUP_ENABLE
2246 /* queue cleanup watchers (and execute them) */
2247 if (expect_false (cleanupcnt))
2248 {
2249 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2250 EV_INVOKE_PENDING;
2251 }
2252 #endif
2253
2254 #if EV_CHILD_ENABLE
2255 if (ev_is_active (&childev))
2256 {
2257 ev_ref (EV_A); /* child watcher */
2258 ev_signal_stop (EV_A_ &childev);
2259 }
2260 #endif
2261
2262 if (ev_is_active (&pipe_w))
2263 {
2264 /*ev_ref (EV_A);*/
2265 /*ev_io_stop (EV_A_ &pipe_w);*/
2266
2267 #if EV_USE_EVENTFD
2268 if (evfd >= 0)
2269 close (evfd);
2270 #endif
2271
2272 if (evpipe [0] >= 0)
2273 {
2274 EV_WIN32_CLOSE_FD (evpipe [0]);
2275 EV_WIN32_CLOSE_FD (evpipe [1]);
2276 }
2277 }
2278
2279 #if EV_USE_SIGNALFD
2280 if (ev_is_active (&sigfd_w))
2281 close (sigfd);
2282 #endif
2283
2284 #if EV_USE_INOTIFY
2285 if (fs_fd >= 0)
2286 close (fs_fd);
2287 #endif
2288
2289 if (backend_fd >= 0)
2290 close (backend_fd);
2291
2292 #if EV_USE_IOCP
2293 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2294 #endif
2295 #if EV_USE_PORT
2296 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2297 #endif
2298 #if EV_USE_KQUEUE
2299 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2300 #endif
2301 #if EV_USE_EPOLL
2302 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2303 #endif
2304 #if EV_USE_POLL
2305 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2306 #endif
2307 #if EV_USE_SELECT
2308 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2309 #endif
2310
2311 for (i = NUMPRI; i--; )
2312 {
2313 array_free (pending, [i]);
2314 #if EV_IDLE_ENABLE
2315 array_free (idle, [i]);
2316 #endif
2317 }
2318
2319 ev_free (anfds); anfds = 0; anfdmax = 0;
2320
2321 /* have to use the microsoft-never-gets-it-right macro */
2322 array_free (rfeed, EMPTY);
2323 array_free (fdchange, EMPTY);
2324 array_free (timer, EMPTY);
2325 #if EV_PERIODIC_ENABLE
2326 array_free (periodic, EMPTY);
2327 #endif
2328 #if EV_FORK_ENABLE
2329 array_free (fork, EMPTY);
2330 #endif
2331 #if EV_CLEANUP_ENABLE
2332 array_free (cleanup, EMPTY);
2333 #endif
2334 array_free (prepare, EMPTY);
2335 array_free (check, EMPTY);
2336 #if EV_ASYNC_ENABLE
2337 array_free (async, EMPTY);
2338 #endif
2339
2340 backend = 0;
2341
2342 #if EV_MULTIPLICITY
2343 if (ev_is_default_loop (EV_A))
2344 #endif
2345 ev_default_loop_ptr = 0;
2346 #if EV_MULTIPLICITY
2347 else
2348 ev_free (EV_A);
2349 #endif
2350 }
2351
2352 #if EV_USE_INOTIFY
2353 inline_size void infy_fork (EV_P);
2354 #endif
2355
2356 inline_size void
2357 loop_fork (EV_P)
2358 {
2359 #if EV_USE_PORT
2360 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2361 #endif
2362 #if EV_USE_KQUEUE
2363 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2364 #endif
2365 #if EV_USE_EPOLL
2366 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2367 #endif
2368 #if EV_USE_INOTIFY
2369 infy_fork (EV_A);
2370 #endif
2371
2372 if (ev_is_active (&pipe_w))
2373 {
2374 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2375
2376 ev_ref (EV_A);
2377 ev_io_stop (EV_A_ &pipe_w);
2378
2379 #if EV_USE_EVENTFD
2380 if (evfd >= 0)
2381 close (evfd);
2382 #endif
2383
2384 if (evpipe [0] >= 0)
2385 {
2386 EV_WIN32_CLOSE_FD (evpipe [0]);
2387 EV_WIN32_CLOSE_FD (evpipe [1]);
2388 }
2389
2390 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2391 evpipe_init (EV_A);
2392 /* now iterate over everything, in case we missed something */
2393 pipecb (EV_A_ &pipe_w, EV_READ);
2394 #endif
2395 }
2396
2397 postfork = 0;
2398 }
2399
2400 #if EV_MULTIPLICITY
2401
2402 struct ev_loop * ecb_cold
2403 ev_loop_new (unsigned int flags)
2404 {
2405 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2406
2407 memset (EV_A, 0, sizeof (struct ev_loop));
2408 loop_init (EV_A_ flags);
2409
2410 if (ev_backend (EV_A))
2411 return EV_A;
2412
2413 ev_free (EV_A);
2414 return 0;
2415 }
2416
2417 #endif /* multiplicity */
2418
2419 #if EV_VERIFY
2420 static void noinline ecb_cold
2421 verify_watcher (EV_P_ W w)
2422 {
2423 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2424
2425 if (w->pending)
2426 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2427 }
2428
2429 static void noinline ecb_cold
2430 verify_heap (EV_P_ ANHE *heap, int N)
2431 {
2432 int i;
2433
2434 for (i = HEAP0; i < N + HEAP0; ++i)
2435 {
2436 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2437 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2438 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2439
2440 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2441 }
2442 }
2443
2444 static void noinline ecb_cold
2445 array_verify (EV_P_ W *ws, int cnt)
2446 {
2447 while (cnt--)
2448 {
2449 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2450 verify_watcher (EV_A_ ws [cnt]);
2451 }
2452 }
2453 #endif
2454
2455 #if EV_FEATURE_API
2456 void ecb_cold
2457 ev_verify (EV_P)
2458 {
2459 #if EV_VERIFY
2460 int i;
2461 WL w;
2462
2463 assert (activecnt >= -1);
2464
2465 assert (fdchangemax >= fdchangecnt);
2466 for (i = 0; i < fdchangecnt; ++i)
2467 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2468
2469 assert (anfdmax >= 0);
2470 for (i = 0; i < anfdmax; ++i)
2471 for (w = anfds [i].head; w; w = w->next)
2472 {
2473 verify_watcher (EV_A_ (W)w);
2474 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2475 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2476 }
2477
2478 assert (timermax >= timercnt);
2479 verify_heap (EV_A_ timers, timercnt);
2480
2481 #if EV_PERIODIC_ENABLE
2482 assert (periodicmax >= periodiccnt);
2483 verify_heap (EV_A_ periodics, periodiccnt);
2484 #endif
2485
2486 for (i = NUMPRI; i--; )
2487 {
2488 assert (pendingmax [i] >= pendingcnt [i]);
2489 #if EV_IDLE_ENABLE
2490 assert (idleall >= 0);
2491 assert (idlemax [i] >= idlecnt [i]);
2492 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2493 #endif
2494 }
2495
2496 #if EV_FORK_ENABLE
2497 assert (forkmax >= forkcnt);
2498 array_verify (EV_A_ (W *)forks, forkcnt);
2499 #endif
2500
2501 #if EV_CLEANUP_ENABLE
2502 assert (cleanupmax >= cleanupcnt);
2503 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2504 #endif
2505
2506 #if EV_ASYNC_ENABLE
2507 assert (asyncmax >= asynccnt);
2508 array_verify (EV_A_ (W *)asyncs, asynccnt);
2509 #endif
2510
2511 #if EV_PREPARE_ENABLE
2512 assert (preparemax >= preparecnt);
2513 array_verify (EV_A_ (W *)prepares, preparecnt);
2514 #endif
2515
2516 #if EV_CHECK_ENABLE
2517 assert (checkmax >= checkcnt);
2518 array_verify (EV_A_ (W *)checks, checkcnt);
2519 #endif
2520
2521 # if 0
2522 #if EV_CHILD_ENABLE
2523 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2524 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2525 #endif
2526 # endif
2527 #endif
2528 }
2529 #endif
2530
2531 #if EV_MULTIPLICITY
2532 struct ev_loop * ecb_cold
2533 #else
2534 int
2535 #endif
2536 ev_default_loop (unsigned int flags)
2537 {
2538 if (!ev_default_loop_ptr)
2539 {
2540 #if EV_MULTIPLICITY
2541 EV_P = ev_default_loop_ptr = &default_loop_struct;
2542 #else
2543 ev_default_loop_ptr = 1;
2544 #endif
2545
2546 loop_init (EV_A_ flags);
2547
2548 if (ev_backend (EV_A))
2549 {
2550 #if EV_CHILD_ENABLE
2551 ev_signal_init (&childev, childcb, SIGCHLD);
2552 ev_set_priority (&childev, EV_MAXPRI);
2553 ev_signal_start (EV_A_ &childev);
2554 ev_unref (EV_A); /* child watcher should not keep loop alive */
2555 #endif
2556 }
2557 else
2558 ev_default_loop_ptr = 0;
2559 }
2560
2561 return ev_default_loop_ptr;
2562 }
2563
2564 void
2565 ev_loop_fork (EV_P)
2566 {
2567 postfork = 1; /* must be in line with ev_default_fork */
2568 }
2569
2570 /*****************************************************************************/
2571
2572 void
2573 ev_invoke (EV_P_ void *w, int revents)
2574 {
2575 EV_CB_INVOKE ((W)w, revents);
2576 }
2577
2578 unsigned int
2579 ev_pending_count (EV_P)
2580 {
2581 int pri;
2582 unsigned int count = 0;
2583
2584 for (pri = NUMPRI; pri--; )
2585 count += pendingcnt [pri];
2586
2587 return count;
2588 }
2589
2590 void noinline
2591 ev_invoke_pending (EV_P)
2592 {
2593 int pri;
2594
2595 for (pri = NUMPRI; pri--; )
2596 while (pendingcnt [pri])
2597 {
2598 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2599
2600 p->w->pending = 0;
2601 EV_CB_INVOKE (p->w, p->events);
2602 EV_FREQUENT_CHECK;
2603 }
2604 }
2605
2606 #if EV_IDLE_ENABLE
2607 /* make idle watchers pending. this handles the "call-idle */
2608 /* only when higher priorities are idle" logic */
2609 inline_size void
2610 idle_reify (EV_P)
2611 {
2612 if (expect_false (idleall))
2613 {
2614 int pri;
2615
2616 for (pri = NUMPRI; pri--; )
2617 {
2618 if (pendingcnt [pri])
2619 break;
2620
2621 if (idlecnt [pri])
2622 {
2623 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2624 break;
2625 }
2626 }
2627 }
2628 }
2629 #endif
2630
2631 /* make timers pending */
2632 inline_size void
2633 timers_reify (EV_P)
2634 {
2635 EV_FREQUENT_CHECK;
2636
2637 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2638 {
2639 do
2640 {
2641 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2642
2643 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2644
2645 /* first reschedule or stop timer */
2646 if (w->repeat)
2647 {
2648 ev_at (w) += w->repeat;
2649 if (ev_at (w) < mn_now)
2650 ev_at (w) = mn_now;
2651
2652 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2653
2654 ANHE_at_cache (timers [HEAP0]);
2655 downheap (timers, timercnt, HEAP0);
2656 }
2657 else
2658 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2659
2660 EV_FREQUENT_CHECK;
2661 feed_reverse (EV_A_ (W)w);
2662 }
2663 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2664
2665 feed_reverse_done (EV_A_ EV_TIMER);
2666 }
2667 }
2668
2669 #if EV_PERIODIC_ENABLE
2670
2671 static void noinline
2672 periodic_recalc (EV_P_ ev_periodic *w)
2673 {
2674 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2675 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2676
2677 /* the above almost always errs on the low side */
2678 while (at <= ev_rt_now)
2679 {
2680 ev_tstamp nat = at + w->interval;
2681
2682 /* when resolution fails us, we use ev_rt_now */
2683 if (expect_false (nat == at))
2684 {
2685 at = ev_rt_now;
2686 break;
2687 }
2688
2689 at = nat;
2690 }
2691
2692 ev_at (w) = at;
2693 }
2694
2695 /* make periodics pending */
2696 inline_size void
2697 periodics_reify (EV_P)
2698 {
2699 EV_FREQUENT_CHECK;
2700
2701 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2702 {
2703 int feed_count = 0;
2704
2705 do
2706 {
2707 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2708
2709 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2710
2711 /* first reschedule or stop timer */
2712 if (w->reschedule_cb)
2713 {
2714 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2715
2716 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2717
2718 ANHE_at_cache (periodics [HEAP0]);
2719 downheap (periodics, periodiccnt, HEAP0);
2720 }
2721 else if (w->interval)
2722 {
2723 periodic_recalc (EV_A_ w);
2724 ANHE_at_cache (periodics [HEAP0]);
2725 downheap (periodics, periodiccnt, HEAP0);
2726 }
2727 else
2728 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2729
2730 EV_FREQUENT_CHECK;
2731 feed_reverse (EV_A_ (W)w);
2732 }
2733 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2734
2735 feed_reverse_done (EV_A_ EV_PERIODIC);
2736 }
2737 }
2738
2739 /* simply recalculate all periodics */
2740 /* TODO: maybe ensure that at least one event happens when jumping forward? */
2741 static void noinline ecb_cold
2742 periodics_reschedule (EV_P)
2743 {
2744 int i;
2745
2746 /* adjust periodics after time jump */
2747 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2748 {
2749 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2750
2751 if (w->reschedule_cb)
2752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2753 else if (w->interval)
2754 periodic_recalc (EV_A_ w);
2755
2756 ANHE_at_cache (periodics [i]);
2757 }
2758
2759 reheap (periodics, periodiccnt);
2760 }
2761 #endif
2762
2763 /* adjust all timers by a given offset */
2764 static void noinline ecb_cold
2765 timers_reschedule (EV_P_ ev_tstamp adjust)
2766 {
2767 int i;
2768
2769 for (i = 0; i < timercnt; ++i)
2770 {
2771 ANHE *he = timers + i + HEAP0;
2772 ANHE_w (*he)->at += adjust;
2773 ANHE_at_cache (*he);
2774 }
2775 }
2776
2777 /* fetch new monotonic and realtime times from the kernel */
2778 /* also detect if there was a timejump, and act accordingly */
2779 inline_speed void
2780 time_update (EV_P_ ev_tstamp max_block)
2781 {
2782 #if EV_USE_MONOTONIC
2783 if (expect_true (have_monotonic))
2784 {
2785 int i;
2786 ev_tstamp odiff = rtmn_diff;
2787
2788 mn_now = get_clock ();
2789
2790 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2791 /* interpolate in the meantime */
2792 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2793 {
2794 ev_rt_now = rtmn_diff + mn_now;
2795 return;
2796 }
2797
2798 now_floor = mn_now;
2799 ev_rt_now = ev_time ();
2800
2801 /* loop a few times, before making important decisions.
2802 * on the choice of "4": one iteration isn't enough,
2803 * in case we get preempted during the calls to
2804 * ev_time and get_clock. a second call is almost guaranteed
2805 * to succeed in that case, though. and looping a few more times
2806 * doesn't hurt either as we only do this on time-jumps or
2807 * in the unlikely event of having been preempted here.
2808 */
2809 for (i = 4; --i; )
2810 {
2811 ev_tstamp diff;
2812 rtmn_diff = ev_rt_now - mn_now;
2813
2814 diff = odiff - rtmn_diff;
2815
2816 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2817 return; /* all is well */
2818
2819 ev_rt_now = ev_time ();
2820 mn_now = get_clock ();
2821 now_floor = mn_now;
2822 }
2823
2824 /* no timer adjustment, as the monotonic clock doesn't jump */
2825 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2826 # if EV_PERIODIC_ENABLE
2827 periodics_reschedule (EV_A);
2828 # endif
2829 }
2830 else
2831 #endif
2832 {
2833 ev_rt_now = ev_time ();
2834
2835 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2836 {
2837 /* adjust timers. this is easy, as the offset is the same for all of them */
2838 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2839 #if EV_PERIODIC_ENABLE
2840 periodics_reschedule (EV_A);
2841 #endif
2842 }
2843
2844 mn_now = ev_rt_now;
2845 }
2846 }
2847
2848 void
2849 ev_run (EV_P_ int flags)
2850 {
2851 #if EV_FEATURE_API
2852 ++loop_depth;
2853 #endif
2854
2855 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2856
2857 loop_done = EVBREAK_CANCEL;
2858
2859 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2860
2861 do
2862 {
2863 #if EV_VERIFY >= 2
2864 ev_verify (EV_A);
2865 #endif
2866
2867 #ifndef _WIN32
2868 if (expect_false (curpid)) /* penalise the forking check even more */
2869 if (expect_false (getpid () != curpid))
2870 {
2871 curpid = getpid ();
2872 postfork = 1;
2873 }
2874 #endif
2875
2876 #if EV_FORK_ENABLE
2877 /* we might have forked, so queue fork handlers */
2878 if (expect_false (postfork))
2879 if (forkcnt)
2880 {
2881 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2882 EV_INVOKE_PENDING;
2883 }
2884 #endif
2885
2886 #if EV_PREPARE_ENABLE
2887 /* queue prepare watchers (and execute them) */
2888 if (expect_false (preparecnt))
2889 {
2890 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2891 EV_INVOKE_PENDING;
2892 }
2893 #endif
2894
2895 if (expect_false (loop_done))
2896 break;
2897
2898 /* we might have forked, so reify kernel state if necessary */
2899 if (expect_false (postfork))
2900 loop_fork (EV_A);
2901
2902 /* update fd-related kernel structures */
2903 fd_reify (EV_A);
2904
2905 /* calculate blocking time */
2906 {
2907 ev_tstamp waittime = 0.;
2908 ev_tstamp sleeptime = 0.;
2909
2910 /* remember old timestamp for io_blocktime calculation */
2911 ev_tstamp prev_mn_now = mn_now;
2912
2913 /* update time to cancel out callback processing overhead */
2914 time_update (EV_A_ 1e100);
2915
2916 /* from now on, we want a pipe-wake-up */
2917 pipe_write_wanted = 1;
2918
2919 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2920
2921 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2922 {
2923 waittime = MAX_BLOCKTIME;
2924
2925 if (timercnt)
2926 {
2927 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2928 if (waittime > to) waittime = to;
2929 }
2930
2931 #if EV_PERIODIC_ENABLE
2932 if (periodiccnt)
2933 {
2934 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2935 if (waittime > to) waittime = to;
2936 }
2937 #endif
2938
2939 /* don't let timeouts decrease the waittime below timeout_blocktime */
2940 if (expect_false (waittime < timeout_blocktime))
2941 waittime = timeout_blocktime;
2942
2943 /* at this point, we NEED to wait, so we have to ensure */
2944 /* to pass a minimum nonzero value to the backend */
2945 if (expect_false (waittime < backend_mintime))
2946 waittime = backend_mintime;
2947
2948 /* extra check because io_blocktime is commonly 0 */
2949 if (expect_false (io_blocktime))
2950 {
2951 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2952
2953 if (sleeptime > waittime - backend_mintime)
2954 sleeptime = waittime - backend_mintime;
2955
2956 if (expect_true (sleeptime > 0.))
2957 {
2958 ev_sleep (sleeptime);
2959 waittime -= sleeptime;
2960 }
2961 }
2962 }
2963
2964 #if EV_FEATURE_API
2965 ++loop_count;
2966 #endif
2967 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2968 backend_poll (EV_A_ waittime);
2969 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2970
2971 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2972
2973 if (pipe_write_skipped)
2974 {
2975 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2976 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2977 }
2978
2979
2980 /* update ev_rt_now, do magic */
2981 time_update (EV_A_ waittime + sleeptime);
2982 }
2983
2984 /* queue pending timers and reschedule them */
2985 timers_reify (EV_A); /* relative timers called last */
2986 #if EV_PERIODIC_ENABLE
2987 periodics_reify (EV_A); /* absolute timers called first */
2988 #endif
2989
2990 #if EV_IDLE_ENABLE
2991 /* queue idle watchers unless other events are pending */
2992 idle_reify (EV_A);
2993 #endif
2994
2995 #if EV_CHECK_ENABLE
2996 /* queue check watchers, to be executed first */
2997 if (expect_false (checkcnt))
2998 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2999 #endif
3000
3001 EV_INVOKE_PENDING;
3002 }
3003 while (expect_true (
3004 activecnt
3005 && !loop_done
3006 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3007 ));
3008
3009 if (loop_done == EVBREAK_ONE)
3010 loop_done = EVBREAK_CANCEL;
3011
3012 #if EV_FEATURE_API
3013 --loop_depth;
3014 #endif
3015 }
3016
3017 void
3018 ev_break (EV_P_ int how)
3019 {
3020 loop_done = how;
3021 }
3022
3023 void
3024 ev_ref (EV_P)
3025 {
3026 ++activecnt;
3027 }
3028
3029 void
3030 ev_unref (EV_P)
3031 {
3032 --activecnt;
3033 }
3034
3035 void
3036 ev_now_update (EV_P)
3037 {
3038 time_update (EV_A_ 1e100);
3039 }
3040
3041 void
3042 ev_suspend (EV_P)
3043 {
3044 ev_now_update (EV_A);
3045 }
3046
3047 void
3048 ev_resume (EV_P)
3049 {
3050 ev_tstamp mn_prev = mn_now;
3051
3052 ev_now_update (EV_A);
3053 timers_reschedule (EV_A_ mn_now - mn_prev);
3054 #if EV_PERIODIC_ENABLE
3055 /* TODO: really do this? */
3056 periodics_reschedule (EV_A);
3057 #endif
3058 }
3059
3060 /*****************************************************************************/
3061 /* singly-linked list management, used when the expected list length is short */
3062
3063 inline_size void
3064 wlist_add (WL *head, WL elem)
3065 {
3066 elem->next = *head;
3067 *head = elem;
3068 }
3069
3070 inline_size void
3071 wlist_del (WL *head, WL elem)
3072 {
3073 while (*head)
3074 {
3075 if (expect_true (*head == elem))
3076 {
3077 *head = elem->next;
3078 break;
3079 }
3080
3081 head = &(*head)->next;
3082 }
3083 }
3084
3085 /* internal, faster, version of ev_clear_pending */
3086 inline_speed void
3087 clear_pending (EV_P_ W w)
3088 {
3089 if (w->pending)
3090 {
3091 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3092 w->pending = 0;
3093 }
3094 }
3095
3096 int
3097 ev_clear_pending (EV_P_ void *w)
3098 {
3099 W w_ = (W)w;
3100 int pending = w_->pending;
3101
3102 if (expect_true (pending))
3103 {
3104 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3105 p->w = (W)&pending_w;
3106 w_->pending = 0;
3107 return p->events;
3108 }
3109 else
3110 return 0;
3111 }
3112
3113 inline_size void
3114 pri_adjust (EV_P_ W w)
3115 {
3116 int pri = ev_priority (w);
3117 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3118 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3119 ev_set_priority (w, pri);
3120 }
3121
3122 inline_speed void
3123 ev_start (EV_P_ W w, int active)
3124 {
3125 pri_adjust (EV_A_ w);
3126 w->active = active;
3127 ev_ref (EV_A);
3128 }
3129
3130 inline_size void
3131 ev_stop (EV_P_ W w)
3132 {
3133 ev_unref (EV_A);
3134 w->active = 0;
3135 }
3136
3137 /*****************************************************************************/
3138
3139 void noinline
3140 ev_io_start (EV_P_ ev_io *w)
3141 {
3142 int fd = w->fd;
3143
3144 if (expect_false (ev_is_active (w)))
3145 return;
3146
3147 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3148 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3149
3150 EV_FREQUENT_CHECK;
3151
3152 ev_start (EV_A_ (W)w, 1);
3153 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3154 wlist_add (&anfds[fd].head, (WL)w);
3155
3156 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3157 w->events &= ~EV__IOFDSET;
3158
3159 EV_FREQUENT_CHECK;
3160 }
3161
3162 void noinline
3163 ev_io_stop (EV_P_ ev_io *w)
3164 {
3165 clear_pending (EV_A_ (W)w);
3166 if (expect_false (!ev_is_active (w)))
3167 return;
3168
3169 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3170
3171 EV_FREQUENT_CHECK;
3172
3173 wlist_del (&anfds[w->fd].head, (WL)w);
3174 ev_stop (EV_A_ (W)w);
3175
3176 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3177
3178 EV_FREQUENT_CHECK;
3179 }
3180
3181 void noinline
3182 ev_timer_start (EV_P_ ev_timer *w)
3183 {
3184 if (expect_false (ev_is_active (w)))
3185 return;
3186
3187 ev_at (w) += mn_now;
3188
3189 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3190
3191 EV_FREQUENT_CHECK;
3192
3193 ++timercnt;
3194 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3195 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3196 ANHE_w (timers [ev_active (w)]) = (WT)w;
3197 ANHE_at_cache (timers [ev_active (w)]);
3198 upheap (timers, ev_active (w));
3199
3200 EV_FREQUENT_CHECK;
3201
3202 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3203 }
3204
3205 void noinline
3206 ev_timer_stop (EV_P_ ev_timer *w)
3207 {
3208 clear_pending (EV_A_ (W)w);
3209 if (expect_false (!ev_is_active (w)))
3210 return;
3211
3212 EV_FREQUENT_CHECK;
3213
3214 {
3215 int active = ev_active (w);
3216
3217 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3218
3219 --timercnt;
3220
3221 if (expect_true (active < timercnt + HEAP0))
3222 {
3223 timers [active] = timers [timercnt + HEAP0];
3224 adjustheap (timers, timercnt, active);
3225 }
3226 }
3227
3228 ev_at (w) -= mn_now;
3229
3230 ev_stop (EV_A_ (W)w);
3231
3232 EV_FREQUENT_CHECK;
3233 }
3234
3235 void noinline
3236 ev_timer_again (EV_P_ ev_timer *w)
3237 {
3238 EV_FREQUENT_CHECK;
3239
3240 if (ev_is_active (w))
3241 {
3242 if (w->repeat)
3243 {
3244 ev_at (w) = mn_now + w->repeat;
3245 ANHE_at_cache (timers [ev_active (w)]);
3246 adjustheap (timers, timercnt, ev_active (w));
3247 }
3248 else
3249 ev_timer_stop (EV_A_ w);
3250 }
3251 else if (w->repeat)
3252 {
3253 ev_at (w) = w->repeat;
3254 ev_timer_start (EV_A_ w);
3255 }
3256
3257 EV_FREQUENT_CHECK;
3258 }
3259
3260 ev_tstamp
3261 ev_timer_remaining (EV_P_ ev_timer *w)
3262 {
3263 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3264 }
3265
3266 #if EV_PERIODIC_ENABLE
3267 void noinline
3268 ev_periodic_start (EV_P_ ev_periodic *w)
3269 {
3270 if (expect_false (ev_is_active (w)))
3271 return;
3272
3273 if (w->reschedule_cb)
3274 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3275 else if (w->interval)
3276 {
3277 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3278 periodic_recalc (EV_A_ w);
3279 }
3280 else
3281 ev_at (w) = w->offset;
3282
3283 EV_FREQUENT_CHECK;
3284
3285 ++periodiccnt;
3286 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3287 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3288 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3289 ANHE_at_cache (periodics [ev_active (w)]);
3290 upheap (periodics, ev_active (w));
3291
3292 EV_FREQUENT_CHECK;
3293
3294 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3295 }
3296
3297 void noinline
3298 ev_periodic_stop (EV_P_ ev_periodic *w)
3299 {
3300 clear_pending (EV_A_ (W)w);
3301 if (expect_false (!ev_is_active (w)))
3302 return;
3303
3304 EV_FREQUENT_CHECK;
3305
3306 {
3307 int active = ev_active (w);
3308
3309 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3310
3311 --periodiccnt;
3312
3313 if (expect_true (active < periodiccnt + HEAP0))
3314 {
3315 periodics [active] = periodics [periodiccnt + HEAP0];
3316 adjustheap (periodics, periodiccnt, active);
3317 }
3318 }
3319
3320 ev_stop (EV_A_ (W)w);
3321
3322 EV_FREQUENT_CHECK;
3323 }
3324
3325 void noinline
3326 ev_periodic_again (EV_P_ ev_periodic *w)
3327 {
3328 /* TODO: use adjustheap and recalculation */
3329 ev_periodic_stop (EV_A_ w);
3330 ev_periodic_start (EV_A_ w);
3331 }
3332 #endif
3333
3334 #ifndef SA_RESTART
3335 # define SA_RESTART 0
3336 #endif
3337
3338 #if EV_SIGNAL_ENABLE
3339
3340 void noinline
3341 ev_signal_start (EV_P_ ev_signal *w)
3342 {
3343 if (expect_false (ev_is_active (w)))
3344 return;
3345
3346 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3347
3348 #if EV_MULTIPLICITY
3349 assert (("libev: a signal must not be attached to two different loops",
3350 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3351
3352 signals [w->signum - 1].loop = EV_A;
3353 #endif
3354
3355 EV_FREQUENT_CHECK;
3356
3357 #if EV_USE_SIGNALFD
3358 if (sigfd == -2)
3359 {
3360 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3361 if (sigfd < 0 && errno == EINVAL)
3362 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3363
3364 if (sigfd >= 0)
3365 {
3366 fd_intern (sigfd); /* doing it twice will not hurt */
3367
3368 sigemptyset (&sigfd_set);
3369
3370 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3371 ev_set_priority (&sigfd_w, EV_MAXPRI);
3372 ev_io_start (EV_A_ &sigfd_w);
3373 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3374 }
3375 }
3376
3377 if (sigfd >= 0)
3378 {
3379 /* TODO: check .head */
3380 sigaddset (&sigfd_set, w->signum);
3381 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3382
3383 signalfd (sigfd, &sigfd_set, 0);
3384 }
3385 #endif
3386
3387 ev_start (EV_A_ (W)w, 1);
3388 wlist_add (&signals [w->signum - 1].head, (WL)w);
3389
3390 if (!((WL)w)->next)
3391 # if EV_USE_SIGNALFD
3392 if (sigfd < 0) /*TODO*/
3393 # endif
3394 {
3395 # ifdef _WIN32
3396 evpipe_init (EV_A);
3397
3398 signal (w->signum, ev_sighandler);
3399 # else
3400 struct sigaction sa;
3401
3402 evpipe_init (EV_A);
3403
3404 sa.sa_handler = ev_sighandler;
3405 sigfillset (&sa.sa_mask);
3406 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3407 sigaction (w->signum, &sa, 0);
3408
3409 if (origflags & EVFLAG_NOSIGMASK)
3410 {
3411 sigemptyset (&sa.sa_mask);
3412 sigaddset (&sa.sa_mask, w->signum);
3413 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3414 }
3415 #endif
3416 }
3417
3418 EV_FREQUENT_CHECK;
3419 }
3420
3421 void noinline
3422 ev_signal_stop (EV_P_ ev_signal *w)
3423 {
3424 clear_pending (EV_A_ (W)w);
3425 if (expect_false (!ev_is_active (w)))
3426 return;
3427
3428 EV_FREQUENT_CHECK;
3429
3430 wlist_del (&signals [w->signum - 1].head, (WL)w);
3431 ev_stop (EV_A_ (W)w);
3432
3433 if (!signals [w->signum - 1].head)
3434 {
3435 #if EV_MULTIPLICITY
3436 signals [w->signum - 1].loop = 0; /* unattach from signal */
3437 #endif
3438 #if EV_USE_SIGNALFD
3439 if (sigfd >= 0)
3440 {
3441 sigset_t ss;
3442
3443 sigemptyset (&ss);
3444 sigaddset (&ss, w->signum);
3445 sigdelset (&sigfd_set, w->signum);
3446
3447 signalfd (sigfd, &sigfd_set, 0);
3448 sigprocmask (SIG_UNBLOCK, &ss, 0);
3449 }
3450 else
3451 #endif
3452 signal (w->signum, SIG_DFL);
3453 }
3454
3455 EV_FREQUENT_CHECK;
3456 }
3457
3458 #endif
3459
3460 #if EV_CHILD_ENABLE
3461
3462 void
3463 ev_child_start (EV_P_ ev_child *w)
3464 {
3465 #if EV_MULTIPLICITY
3466 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3467 #endif
3468 if (expect_false (ev_is_active (w)))
3469 return;
3470
3471 EV_FREQUENT_CHECK;
3472
3473 ev_start (EV_A_ (W)w, 1);
3474 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3475
3476 EV_FREQUENT_CHECK;
3477 }
3478
3479 void
3480 ev_child_stop (EV_P_ ev_child *w)
3481 {
3482 clear_pending (EV_A_ (W)w);
3483 if (expect_false (!ev_is_active (w)))
3484 return;
3485
3486 EV_FREQUENT_CHECK;
3487
3488 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3489 ev_stop (EV_A_ (W)w);
3490
3491 EV_FREQUENT_CHECK;
3492 }
3493
3494 #endif
3495
3496 #if EV_STAT_ENABLE
3497
3498 # ifdef _WIN32
3499 # undef lstat
3500 # define lstat(a,b) _stati64 (a,b)
3501 # endif
3502
3503 #define DEF_STAT_INTERVAL 5.0074891
3504 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3505 #define MIN_STAT_INTERVAL 0.1074891
3506
3507 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3508
3509 #if EV_USE_INOTIFY
3510
3511 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3512 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3513
3514 static void noinline
3515 infy_add (EV_P_ ev_stat *w)
3516 {
3517 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);
3518
3519 if (w->wd >= 0)
3520 {
3521 struct statfs sfs;
3522
3523 /* now local changes will be tracked by inotify, but remote changes won't */
3524 /* unless the filesystem is known to be local, we therefore still poll */
3525 /* also do poll on <2.6.25, but with normal frequency */
3526
3527 if (!fs_2625)
3528 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3529 else if (!statfs (w->path, &sfs)
3530 && (sfs.f_type == 0x1373 /* devfs */
3531 || sfs.f_type == 0xEF53 /* ext2/3 */
3532 || sfs.f_type == 0x3153464a /* jfs */
3533 || sfs.f_type == 0x52654973 /* reiser3 */
3534 || sfs.f_type == 0x01021994 /* tempfs */
3535 || sfs.f_type == 0x58465342 /* xfs */))
3536 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3537 else
3538 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3539 }
3540 else
3541 {
3542 /* can't use inotify, continue to stat */
3543 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3544
3545 /* if path is not there, monitor some parent directory for speedup hints */
3546 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3547 /* but an efficiency issue only */
3548 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3549 {
3550 char path [4096];
3551 strcpy (path, w->path);
3552
3553 do
3554 {
3555 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3556 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3557
3558 char *pend = strrchr (path, '/');
3559
3560 if (!pend || pend == path)
3561 break;
3562
3563 *pend = 0;
3564 w->wd = inotify_add_watch (fs_fd, path, mask);
3565 }
3566 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3567 }
3568 }
3569
3570 if (w->wd >= 0)
3571 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3572
3573 /* now re-arm timer, if required */
3574 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3575 ev_timer_again (EV_A_ &w->timer);
3576 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3577 }
3578
3579 static void noinline
3580 infy_del (EV_P_ ev_stat *w)
3581 {
3582 int slot;
3583 int wd = w->wd;
3584
3585 if (wd < 0)
3586 return;
3587
3588 w->wd = -2;
3589 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3590 wlist_del (&fs_hash [slot].head, (WL)w);
3591
3592 /* remove this watcher, if others are watching it, they will rearm */
3593 inotify_rm_watch (fs_fd, wd);
3594 }
3595
3596 static void noinline
3597 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3598 {
3599 if (slot < 0)
3600 /* overflow, need to check for all hash slots */
3601 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3602 infy_wd (EV_A_ slot, wd, ev);
3603 else
3604 {
3605 WL w_;
3606
3607 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3608 {
3609 ev_stat *w = (ev_stat *)w_;
3610 w_ = w_->next; /* lets us remove this watcher and all before it */
3611
3612 if (w->wd == wd || wd == -1)
3613 {
3614 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3615 {
3616 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3617 w->wd = -1;
3618 infy_add (EV_A_ w); /* re-add, no matter what */
3619 }
3620
3621 stat_timer_cb (EV_A_ &w->timer, 0);
3622 }
3623 }
3624 }
3625 }
3626
3627 static void
3628 infy_cb (EV_P_ ev_io *w, int revents)
3629 {
3630 char buf [EV_INOTIFY_BUFSIZE];
3631 int ofs;
3632 int len = read (fs_fd, buf, sizeof (buf));
3633
3634 for (ofs = 0; ofs < len; )
3635 {
3636 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3637 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3638 ofs += sizeof (struct inotify_event) + ev->len;
3639 }
3640 }
3641
3642 inline_size void ecb_cold
3643 ev_check_2625 (EV_P)
3644 {
3645 /* kernels < 2.6.25 are borked
3646 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3647 */
3648 if (ev_linux_version () < 0x020619)
3649 return;
3650
3651 fs_2625 = 1;
3652 }
3653
3654 inline_size int
3655 infy_newfd (void)
3656 {
3657 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3658 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3659 if (fd >= 0)
3660 return fd;
3661 #endif
3662 return inotify_init ();
3663 }
3664
3665 inline_size void
3666 infy_init (EV_P)
3667 {
3668 if (fs_fd != -2)
3669 return;
3670
3671 fs_fd = -1;
3672
3673 ev_check_2625 (EV_A);
3674
3675 fs_fd = infy_newfd ();
3676
3677 if (fs_fd >= 0)
3678 {
3679 fd_intern (fs_fd);
3680 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3681 ev_set_priority (&fs_w, EV_MAXPRI);
3682 ev_io_start (EV_A_ &fs_w);
3683 ev_unref (EV_A);
3684 }
3685 }
3686
3687 inline_size void
3688 infy_fork (EV_P)
3689 {
3690 int slot;
3691
3692 if (fs_fd < 0)
3693 return;
3694
3695 ev_ref (EV_A);
3696 ev_io_stop (EV_A_ &fs_w);
3697 close (fs_fd);
3698 fs_fd = infy_newfd ();
3699
3700 if (fs_fd >= 0)
3701 {
3702 fd_intern (fs_fd);
3703 ev_io_set (&fs_w, fs_fd, EV_READ);
3704 ev_io_start (EV_A_ &fs_w);
3705 ev_unref (EV_A);
3706 }
3707
3708 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3709 {
3710 WL w_ = fs_hash [slot].head;
3711 fs_hash [slot].head = 0;
3712
3713 while (w_)
3714 {
3715 ev_stat *w = (ev_stat *)w_;
3716 w_ = w_->next; /* lets us add this watcher */
3717
3718 w->wd = -1;
3719
3720 if (fs_fd >= 0)
3721 infy_add (EV_A_ w); /* re-add, no matter what */
3722 else
3723 {
3724 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3725 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3726 ev_timer_again (EV_A_ &w->timer);
3727 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3728 }
3729 }
3730 }
3731 }
3732
3733 #endif
3734
3735 #ifdef _WIN32
3736 # define EV_LSTAT(p,b) _stati64 (p, b)
3737 #else
3738 # define EV_LSTAT(p,b) lstat (p, b)
3739 #endif
3740
3741 void
3742 ev_stat_stat (EV_P_ ev_stat *w)
3743 {
3744 if (lstat (w->path, &w->attr) < 0)
3745 w->attr.st_nlink = 0;
3746 else if (!w->attr.st_nlink)
3747 w->attr.st_nlink = 1;
3748 }
3749
3750 static void noinline
3751 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3752 {
3753 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3754
3755 ev_statdata prev = w->attr;
3756 ev_stat_stat (EV_A_ w);
3757
3758 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3759 if (
3760 prev.st_dev != w->attr.st_dev
3761 || prev.st_ino != w->attr.st_ino
3762 || prev.st_mode != w->attr.st_mode
3763 || prev.st_nlink != w->attr.st_nlink
3764 || prev.st_uid != w->attr.st_uid
3765 || prev.st_gid != w->attr.st_gid
3766 || prev.st_rdev != w->attr.st_rdev
3767 || prev.st_size != w->attr.st_size
3768 || prev.st_atime != w->attr.st_atime
3769 || prev.st_mtime != w->attr.st_mtime
3770 || prev.st_ctime != w->attr.st_ctime
3771 ) {
3772 /* we only update w->prev on actual differences */
3773 /* in case we test more often than invoke the callback, */
3774 /* to ensure that prev is always different to attr */
3775 w->prev = prev;
3776
3777 #if EV_USE_INOTIFY
3778 if (fs_fd >= 0)
3779 {
3780 infy_del (EV_A_ w);
3781 infy_add (EV_A_ w);
3782 ev_stat_stat (EV_A_ w); /* avoid race... */
3783 }
3784 #endif
3785
3786 ev_feed_event (EV_A_ w, EV_STAT);
3787 }
3788 }
3789
3790 void
3791 ev_stat_start (EV_P_ ev_stat *w)
3792 {
3793 if (expect_false (ev_is_active (w)))
3794 return;
3795
3796 ev_stat_stat (EV_A_ w);
3797
3798 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3799 w->interval = MIN_STAT_INTERVAL;
3800
3801 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3802 ev_set_priority (&w->timer, ev_priority (w));
3803
3804 #if EV_USE_INOTIFY
3805 infy_init (EV_A);
3806
3807 if (fs_fd >= 0)
3808 infy_add (EV_A_ w);
3809 else
3810 #endif
3811 {
3812 ev_timer_again (EV_A_ &w->timer);
3813 ev_unref (EV_A);
3814 }
3815
3816 ev_start (EV_A_ (W)w, 1);
3817
3818 EV_FREQUENT_CHECK;
3819 }
3820
3821 void
3822 ev_stat_stop (EV_P_ ev_stat *w)
3823 {
3824 clear_pending (EV_A_ (W)w);
3825 if (expect_false (!ev_is_active (w)))
3826 return;
3827
3828 EV_FREQUENT_CHECK;
3829
3830 #if EV_USE_INOTIFY
3831 infy_del (EV_A_ w);
3832 #endif
3833
3834 if (ev_is_active (&w->timer))
3835 {
3836 ev_ref (EV_A);
3837 ev_timer_stop (EV_A_ &w->timer);
3838 }
3839
3840 ev_stop (EV_A_ (W)w);
3841
3842 EV_FREQUENT_CHECK;
3843 }
3844 #endif
3845
3846 #if EV_IDLE_ENABLE
3847 void
3848 ev_idle_start (EV_P_ ev_idle *w)
3849 {
3850 if (expect_false (ev_is_active (w)))
3851 return;
3852
3853 pri_adjust (EV_A_ (W)w);
3854
3855 EV_FREQUENT_CHECK;
3856
3857 {
3858 int active = ++idlecnt [ABSPRI (w)];
3859
3860 ++idleall;
3861 ev_start (EV_A_ (W)w, active);
3862
3863 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3864 idles [ABSPRI (w)][active - 1] = w;
3865 }
3866
3867 EV_FREQUENT_CHECK;
3868 }
3869
3870 void
3871 ev_idle_stop (EV_P_ ev_idle *w)
3872 {
3873 clear_pending (EV_A_ (W)w);
3874 if (expect_false (!ev_is_active (w)))
3875 return;
3876
3877 EV_FREQUENT_CHECK;
3878
3879 {
3880 int active = ev_active (w);
3881
3882 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3883 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3884
3885 ev_stop (EV_A_ (W)w);
3886 --idleall;
3887 }
3888
3889 EV_FREQUENT_CHECK;
3890 }
3891 #endif
3892
3893 #if EV_PREPARE_ENABLE
3894 void
3895 ev_prepare_start (EV_P_ ev_prepare *w)
3896 {
3897 if (expect_false (ev_is_active (w)))
3898 return;
3899
3900 EV_FREQUENT_CHECK;
3901
3902 ev_start (EV_A_ (W)w, ++preparecnt);
3903 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3904 prepares [preparecnt - 1] = w;
3905
3906 EV_FREQUENT_CHECK;
3907 }
3908
3909 void
3910 ev_prepare_stop (EV_P_ ev_prepare *w)
3911 {
3912 clear_pending (EV_A_ (W)w);
3913 if (expect_false (!ev_is_active (w)))
3914 return;
3915
3916 EV_FREQUENT_CHECK;
3917
3918 {
3919 int active = ev_active (w);
3920
3921 prepares [active - 1] = prepares [--preparecnt];
3922 ev_active (prepares [active - 1]) = active;
3923 }
3924
3925 ev_stop (EV_A_ (W)w);
3926
3927 EV_FREQUENT_CHECK;
3928 }
3929 #endif
3930
3931 #if EV_CHECK_ENABLE
3932 void
3933 ev_check_start (EV_P_ ev_check *w)
3934 {
3935 if (expect_false (ev_is_active (w)))
3936 return;
3937
3938 EV_FREQUENT_CHECK;
3939
3940 ev_start (EV_A_ (W)w, ++checkcnt);
3941 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3942 checks [checkcnt - 1] = w;
3943
3944 EV_FREQUENT_CHECK;
3945 }
3946
3947 void
3948 ev_check_stop (EV_P_ ev_check *w)
3949 {
3950 clear_pending (EV_A_ (W)w);
3951 if (expect_false (!ev_is_active (w)))
3952 return;
3953
3954 EV_FREQUENT_CHECK;
3955
3956 {
3957 int active = ev_active (w);
3958
3959 checks [active - 1] = checks [--checkcnt];
3960 ev_active (checks [active - 1]) = active;
3961 }
3962
3963 ev_stop (EV_A_ (W)w);
3964
3965 EV_FREQUENT_CHECK;
3966 }
3967 #endif
3968
3969 #if EV_EMBED_ENABLE
3970 void noinline
3971 ev_embed_sweep (EV_P_ ev_embed *w)
3972 {
3973 ev_run (w->other, EVRUN_NOWAIT);
3974 }
3975
3976 static void
3977 embed_io_cb (EV_P_ ev_io *io, int revents)
3978 {
3979 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3980
3981 if (ev_cb (w))
3982 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3983 else
3984 ev_run (w->other, EVRUN_NOWAIT);
3985 }
3986
3987 static void
3988 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3989 {
3990 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3991
3992 {
3993 EV_P = w->other;
3994
3995 while (fdchangecnt)
3996 {
3997 fd_reify (EV_A);
3998 ev_run (EV_A_ EVRUN_NOWAIT);
3999 }
4000 }
4001 }
4002
4003 static void
4004 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4005 {
4006 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4007
4008 ev_embed_stop (EV_A_ w);
4009
4010 {
4011 EV_P = w->other;
4012
4013 ev_loop_fork (EV_A);
4014 ev_run (EV_A_ EVRUN_NOWAIT);
4015 }
4016
4017 ev_embed_start (EV_A_ w);
4018 }
4019
4020 #if 0
4021 static void
4022 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4023 {
4024 ev_idle_stop (EV_A_ idle);
4025 }
4026 #endif
4027
4028 void
4029 ev_embed_start (EV_P_ ev_embed *w)
4030 {
4031 if (expect_false (ev_is_active (w)))
4032 return;
4033
4034 {
4035 EV_P = w->other;
4036 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4037 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4038 }
4039
4040 EV_FREQUENT_CHECK;
4041
4042 ev_set_priority (&w->io, ev_priority (w));
4043 ev_io_start (EV_A_ &w->io);
4044
4045 ev_prepare_init (&w->prepare, embed_prepare_cb);
4046 ev_set_priority (&w->prepare, EV_MINPRI);
4047 ev_prepare_start (EV_A_ &w->prepare);
4048
4049 ev_fork_init (&w->fork, embed_fork_cb);
4050 ev_fork_start (EV_A_ &w->fork);
4051
4052 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4053
4054 ev_start (EV_A_ (W)w, 1);
4055
4056 EV_FREQUENT_CHECK;
4057 }
4058
4059 void
4060 ev_embed_stop (EV_P_ ev_embed *w)
4061 {
4062 clear_pending (EV_A_ (W)w);
4063 if (expect_false (!ev_is_active (w)))
4064 return;
4065
4066 EV_FREQUENT_CHECK;
4067
4068 ev_io_stop (EV_A_ &w->io);
4069 ev_prepare_stop (EV_A_ &w->prepare);
4070 ev_fork_stop (EV_A_ &w->fork);
4071
4072 ev_stop (EV_A_ (W)w);
4073
4074 EV_FREQUENT_CHECK;
4075 }
4076 #endif
4077
4078 #if EV_FORK_ENABLE
4079 void
4080 ev_fork_start (EV_P_ ev_fork *w)
4081 {
4082 if (expect_false (ev_is_active (w)))
4083 return;
4084
4085 EV_FREQUENT_CHECK;
4086
4087 ev_start (EV_A_ (W)w, ++forkcnt);
4088 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4089 forks [forkcnt - 1] = w;
4090
4091 EV_FREQUENT_CHECK;
4092 }
4093
4094 void
4095 ev_fork_stop (EV_P_ ev_fork *w)
4096 {
4097 clear_pending (EV_A_ (W)w);
4098 if (expect_false (!ev_is_active (w)))
4099 return;
4100
4101 EV_FREQUENT_CHECK;
4102
4103 {
4104 int active = ev_active (w);
4105
4106 forks [active - 1] = forks [--forkcnt];
4107 ev_active (forks [active - 1]) = active;
4108 }
4109
4110 ev_stop (EV_A_ (W)w);
4111
4112 EV_FREQUENT_CHECK;
4113 }
4114 #endif
4115
4116 #if EV_CLEANUP_ENABLE
4117 void
4118 ev_cleanup_start (EV_P_ ev_cleanup *w)
4119 {
4120 if (expect_false (ev_is_active (w)))
4121 return;
4122
4123 EV_FREQUENT_CHECK;
4124
4125 ev_start (EV_A_ (W)w, ++cleanupcnt);
4126 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4127 cleanups [cleanupcnt - 1] = w;
4128
4129 /* cleanup watchers should never keep a refcount on the loop */
4130 ev_unref (EV_A);
4131 EV_FREQUENT_CHECK;
4132 }
4133
4134 void
4135 ev_cleanup_stop (EV_P_ ev_cleanup *w)
4136 {
4137 clear_pending (EV_A_ (W)w);
4138 if (expect_false (!ev_is_active (w)))
4139 return;
4140
4141 EV_FREQUENT_CHECK;
4142 ev_ref (EV_A);
4143
4144 {
4145 int active = ev_active (w);
4146
4147 cleanups [active - 1] = cleanups [--cleanupcnt];
4148 ev_active (cleanups [active - 1]) = active;
4149 }
4150
4151 ev_stop (EV_A_ (W)w);
4152
4153 EV_FREQUENT_CHECK;
4154 }
4155 #endif
4156
4157 #if EV_ASYNC_ENABLE
4158 void
4159 ev_async_start (EV_P_ ev_async *w)
4160 {
4161 if (expect_false (ev_is_active (w)))
4162 return;
4163
4164 w->sent = 0;
4165
4166 evpipe_init (EV_A);
4167
4168 EV_FREQUENT_CHECK;
4169
4170 ev_start (EV_A_ (W)w, ++asynccnt);
4171 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4172 asyncs [asynccnt - 1] = w;
4173
4174 EV_FREQUENT_CHECK;
4175 }
4176
4177 void
4178 ev_async_stop (EV_P_ ev_async *w)
4179 {
4180 clear_pending (EV_A_ (W)w);
4181 if (expect_false (!ev_is_active (w)))
4182 return;
4183
4184 EV_FREQUENT_CHECK;
4185
4186 {
4187 int active = ev_active (w);
4188
4189 asyncs [active - 1] = asyncs [--asynccnt];
4190 ev_active (asyncs [active - 1]) = active;
4191 }
4192
4193 ev_stop (EV_A_ (W)w);
4194
4195 EV_FREQUENT_CHECK;
4196 }
4197
4198 void
4199 ev_async_send (EV_P_ ev_async *w)
4200 {
4201 w->sent = 1;
4202 evpipe_write (EV_A_ &async_pending);
4203 }
4204 #endif
4205
4206 /*****************************************************************************/
4207
4208 struct ev_once
4209 {
4210 ev_io io;
4211 ev_timer to;
4212 void (*cb)(int revents, void *arg);
4213 void *arg;
4214 };
4215
4216 static void
4217 once_cb (EV_P_ struct ev_once *once, int revents)
4218 {
4219 void (*cb)(int revents, void *arg) = once->cb;
4220 void *arg = once->arg;
4221
4222 ev_io_stop (EV_A_ &once->io);
4223 ev_timer_stop (EV_A_ &once->to);
4224 ev_free (once);
4225
4226 cb (revents, arg);
4227 }
4228
4229 static void
4230 once_cb_io (EV_P_ ev_io *w, int revents)
4231 {
4232 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4233
4234 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4235 }
4236
4237 static void
4238 once_cb_to (EV_P_ ev_timer *w, int revents)
4239 {
4240 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4241
4242 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4243 }
4244
4245 void
4246 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
4247 {
4248 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4249
4250 if (expect_false (!once))
4251 {
4252 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4253 return;
4254 }
4255
4256 once->cb = cb;
4257 once->arg = arg;
4258
4259 ev_init (&once->io, once_cb_io);
4260 if (fd >= 0)
4261 {
4262 ev_io_set (&once->io, fd, events);
4263 ev_io_start (EV_A_ &once->io);
4264 }
4265
4266 ev_init (&once->to, once_cb_to);
4267 if (timeout >= 0.)
4268 {
4269 ev_timer_set (&once->to, timeout, 0.);
4270 ev_timer_start (EV_A_ &once->to);
4271 }
4272 }
4273
4274 /*****************************************************************************/
4275
4276 #if EV_WALK_ENABLE
4277 void ecb_cold
4278 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4279 {
4280 int i, j;
4281 ev_watcher_list *wl, *wn;
4282
4283 if (types & (EV_IO | EV_EMBED))
4284 for (i = 0; i < anfdmax; ++i)
4285 for (wl = anfds [i].head; wl; )
4286 {
4287 wn = wl->next;
4288
4289 #if EV_EMBED_ENABLE
4290 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4291 {
4292 if (types & EV_EMBED)
4293 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4294 }
4295 else
4296 #endif
4297 #if EV_USE_INOTIFY
4298 if (ev_cb ((ev_io *)wl) == infy_cb)
4299 ;
4300 else
4301 #endif
4302 if ((ev_io *)wl != &pipe_w)
4303 if (types & EV_IO)
4304 cb (EV_A_ EV_IO, wl);
4305
4306 wl = wn;
4307 }
4308
4309 if (types & (EV_TIMER | EV_STAT))
4310 for (i = timercnt + HEAP0; i-- > HEAP0; )
4311 #if EV_STAT_ENABLE
4312 /*TODO: timer is not always active*/
4313 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4314 {
4315 if (types & EV_STAT)
4316 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4317 }
4318 else
4319 #endif
4320 if (types & EV_TIMER)
4321 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4322
4323 #if EV_PERIODIC_ENABLE
4324 if (types & EV_PERIODIC)
4325 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4326 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4327 #endif
4328
4329 #if EV_IDLE_ENABLE
4330 if (types & EV_IDLE)
4331 for (j = NUMPRI; j--; )
4332 for (i = idlecnt [j]; i--; )
4333 cb (EV_A_ EV_IDLE, idles [j][i]);
4334 #endif
4335
4336 #if EV_FORK_ENABLE
4337 if (types & EV_FORK)
4338 for (i = forkcnt; i--; )
4339 if (ev_cb (forks [i]) != embed_fork_cb)
4340 cb (EV_A_ EV_FORK, forks [i]);
4341 #endif
4342
4343 #if EV_ASYNC_ENABLE
4344 if (types & EV_ASYNC)
4345 for (i = asynccnt; i--; )
4346 cb (EV_A_ EV_ASYNC, asyncs [i]);
4347 #endif
4348
4349 #if EV_PREPARE_ENABLE
4350 if (types & EV_PREPARE)
4351 for (i = preparecnt; i--; )
4352 # if EV_EMBED_ENABLE
4353 if (ev_cb (prepares [i]) != embed_prepare_cb)
4354 # endif
4355 cb (EV_A_ EV_PREPARE, prepares [i]);
4356 #endif
4357
4358 #if EV_CHECK_ENABLE
4359 if (types & EV_CHECK)
4360 for (i = checkcnt; i--; )
4361 cb (EV_A_ EV_CHECK, checks [i]);
4362 #endif
4363
4364 #if EV_SIGNAL_ENABLE
4365 if (types & EV_SIGNAL)
4366 for (i = 0; i < EV_NSIG - 1; ++i)
4367 for (wl = signals [i].head; wl; )
4368 {
4369 wn = wl->next;
4370 cb (EV_A_ EV_SIGNAL, wl);
4371 wl = wn;
4372 }
4373 #endif
4374
4375 #if EV_CHILD_ENABLE
4376 if (types & EV_CHILD)
4377 for (i = (EV_PID_HASHSIZE); i--; )
4378 for (wl = childs [i]; wl; )
4379 {
4380 wn = wl->next;
4381 cb (EV_A_ EV_CHILD, wl);
4382 wl = wn;
4383 }
4384 #endif
4385 /* EV_STAT 0x00001000 /* stat data changed */
4386 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4387 }
4388 #endif
4389
4390 #if EV_MULTIPLICITY
4391 #include "ev_wrap.h"
4392 #endif
4393
4394 EV_CPP(})
4395