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Revision: 1.398
Committed: Sun Sep 25 21:27:35 2011 UTC (12 years, 9 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.397: +18 -2 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) || defined(__INTEL_COMPILER) || defined(__clang__)
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) || defined(__clang__)
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 __cplusplus
849 template<typename T>
850 static inline T ecb_div_rd (T val, T div)
851 {
852 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
853 }
854 template<typename T>
855 static inline T ecb_div_ru (T val, T div)
856 {
857 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
858 }
859 #else
860 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
861 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
862 #endif
863
864 #if ecb_cplusplus_does_not_suck
865 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
866 template<typename T, int N>
867 static inline int ecb_array_length (const T (&arr)[N])
868 {
869 return N;
870 }
871 #else
872 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
873 #endif
874
875 #endif
876
877 /* ECB.H END */
878
879 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
880 /* if your architecture doesn't need memory fences, e.g. because it is
881 * single-cpu/core, or if you use libev in a project that doesn't use libev
882 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
883 * libev, in which casess the memory fences become nops.
884 * alternatively, you can remove this #error and link against libpthread,
885 * which will then provide the memory fences.
886 */
887 # error "memory fences not defined for your architecture, please report"
888 #endif
889
890 #ifndef ECB_MEMORY_FENCE
891 # define ECB_MEMORY_FENCE do { } while (0)
892 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
893 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
894 #endif
895
896 #define expect_false(cond) ecb_expect_false (cond)
897 #define expect_true(cond) ecb_expect_true (cond)
898 #define noinline ecb_noinline
899
900 #define inline_size ecb_inline
901
902 #if EV_FEATURE_CODE
903 # define inline_speed ecb_inline
904 #else
905 # define inline_speed static noinline
906 #endif
907
908 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
909
910 #if EV_MINPRI == EV_MAXPRI
911 # define ABSPRI(w) (((W)w), 0)
912 #else
913 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
914 #endif
915
916 #define EMPTY /* required for microsofts broken pseudo-c compiler */
917 #define EMPTY2(a,b) /* used to suppress some warnings */
918
919 typedef ev_watcher *W;
920 typedef ev_watcher_list *WL;
921 typedef ev_watcher_time *WT;
922
923 #define ev_active(w) ((W)(w))->active
924 #define ev_at(w) ((WT)(w))->at
925
926 #if EV_USE_REALTIME
927 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
928 /* giving it a reasonably high chance of working on typical architectures */
929 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
930 #endif
931
932 #if EV_USE_MONOTONIC
933 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
934 #endif
935
936 #ifndef EV_FD_TO_WIN32_HANDLE
937 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
938 #endif
939 #ifndef EV_WIN32_HANDLE_TO_FD
940 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
941 #endif
942 #ifndef EV_WIN32_CLOSE_FD
943 # define EV_WIN32_CLOSE_FD(fd) close (fd)
944 #endif
945
946 #ifdef _WIN32
947 # include "ev_win32.c"
948 #endif
949
950 /*****************************************************************************/
951
952 /* define a suitable floor function (only used by periodics atm) */
953
954 #if EV_USE_FLOOR
955 # include <math.h>
956 # define ev_floor(v) floor (v)
957 #else
958
959 #include <float.h>
960
961 /* a floor() replacement function, should be independent of ev_tstamp type */
962 static ev_tstamp noinline
963 ev_floor (ev_tstamp v)
964 {
965 /* the choice of shift factor is not terribly important */
966 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
968 #else
969 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
970 #endif
971
972 /* argument too large for an unsigned long? */
973 if (expect_false (v >= shift))
974 {
975 ev_tstamp f;
976
977 if (v == v - 1.)
978 return v; /* very large number */
979
980 f = shift * ev_floor (v * (1. / shift));
981 return f + ev_floor (v - f);
982 }
983
984 /* special treatment for negative args? */
985 if (expect_false (v < 0.))
986 {
987 ev_tstamp f = -ev_floor (-v);
988
989 return f - (f == v ? 0 : 1);
990 }
991
992 /* fits into an unsigned long */
993 return (unsigned long)v;
994 }
995
996 #endif
997
998 /*****************************************************************************/
999
1000 #ifdef __linux
1001 # include <sys/utsname.h>
1002 #endif
1003
1004 static unsigned int noinline ecb_cold
1005 ev_linux_version (void)
1006 {
1007 #ifdef __linux
1008 unsigned int v = 0;
1009 struct utsname buf;
1010 int i;
1011 char *p = buf.release;
1012
1013 if (uname (&buf))
1014 return 0;
1015
1016 for (i = 3+1; --i; )
1017 {
1018 unsigned int c = 0;
1019
1020 for (;;)
1021 {
1022 if (*p >= '0' && *p <= '9')
1023 c = c * 10 + *p++ - '0';
1024 else
1025 {
1026 p += *p == '.';
1027 break;
1028 }
1029 }
1030
1031 v = (v << 8) | c;
1032 }
1033
1034 return v;
1035 #else
1036 return 0;
1037 #endif
1038 }
1039
1040 /*****************************************************************************/
1041
1042 #if EV_AVOID_STDIO
1043 static void noinline ecb_cold
1044 ev_printerr (const char *msg)
1045 {
1046 write (STDERR_FILENO, msg, strlen (msg));
1047 }
1048 #endif
1049
1050 static void (*syserr_cb)(const char *msg);
1051
1052 void ecb_cold
1053 ev_set_syserr_cb (void (*cb)(const char *msg))
1054 {
1055 syserr_cb = cb;
1056 }
1057
1058 static void noinline ecb_cold
1059 ev_syserr (const char *msg)
1060 {
1061 if (!msg)
1062 msg = "(libev) system error";
1063
1064 if (syserr_cb)
1065 syserr_cb (msg);
1066 else
1067 {
1068 #if EV_AVOID_STDIO
1069 ev_printerr (msg);
1070 ev_printerr (": ");
1071 ev_printerr (strerror (errno));
1072 ev_printerr ("\n");
1073 #else
1074 perror (msg);
1075 #endif
1076 abort ();
1077 }
1078 }
1079
1080 static void *
1081 ev_realloc_emul (void *ptr, long size)
1082 {
1083 #if __GLIBC__
1084 return realloc (ptr, size);
1085 #else
1086 /* some systems, notably openbsd and darwin, fail to properly
1087 * implement realloc (x, 0) (as required by both ansi c-89 and
1088 * the single unix specification, so work around them here.
1089 */
1090
1091 if (size)
1092 return realloc (ptr, size);
1093
1094 free (ptr);
1095 return 0;
1096 #endif
1097 }
1098
1099 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
1100
1101 void ecb_cold
1102 ev_set_allocator (void *(*cb)(void *ptr, long size))
1103 {
1104 alloc = cb;
1105 }
1106
1107 inline_speed void *
1108 ev_realloc (void *ptr, long size)
1109 {
1110 ptr = alloc (ptr, size);
1111
1112 if (!ptr && size)
1113 {
1114 #if EV_AVOID_STDIO
1115 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1116 #else
1117 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1118 #endif
1119 abort ();
1120 }
1121
1122 return ptr;
1123 }
1124
1125 #define ev_malloc(size) ev_realloc (0, (size))
1126 #define ev_free(ptr) ev_realloc ((ptr), 0)
1127
1128 /*****************************************************************************/
1129
1130 /* set in reify when reification needed */
1131 #define EV_ANFD_REIFY 1
1132
1133 /* file descriptor info structure */
1134 typedef struct
1135 {
1136 WL head;
1137 unsigned char events; /* the events watched for */
1138 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1139 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1140 unsigned char unused;
1141 #if EV_USE_EPOLL
1142 unsigned int egen; /* generation counter to counter epoll bugs */
1143 #endif
1144 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1145 SOCKET handle;
1146 #endif
1147 #if EV_USE_IOCP
1148 OVERLAPPED or, ow;
1149 #endif
1150 } ANFD;
1151
1152 /* stores the pending event set for a given watcher */
1153 typedef struct
1154 {
1155 W w;
1156 int events; /* the pending event set for the given watcher */
1157 } ANPENDING;
1158
1159 #if EV_USE_INOTIFY
1160 /* hash table entry per inotify-id */
1161 typedef struct
1162 {
1163 WL head;
1164 } ANFS;
1165 #endif
1166
1167 /* Heap Entry */
1168 #if EV_HEAP_CACHE_AT
1169 /* a heap element */
1170 typedef struct {
1171 ev_tstamp at;
1172 WT w;
1173 } ANHE;
1174
1175 #define ANHE_w(he) (he).w /* access watcher, read-write */
1176 #define ANHE_at(he) (he).at /* access cached at, read-only */
1177 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1178 #else
1179 /* a heap element */
1180 typedef WT ANHE;
1181
1182 #define ANHE_w(he) (he)
1183 #define ANHE_at(he) (he)->at
1184 #define ANHE_at_cache(he)
1185 #endif
1186
1187 #if EV_MULTIPLICITY
1188
1189 struct ev_loop
1190 {
1191 ev_tstamp ev_rt_now;
1192 #define ev_rt_now ((loop)->ev_rt_now)
1193 #define VAR(name,decl) decl;
1194 #include "ev_vars.h"
1195 #undef VAR
1196 };
1197 #include "ev_wrap.h"
1198
1199 static struct ev_loop default_loop_struct;
1200 struct ev_loop *ev_default_loop_ptr;
1201
1202 #else
1203
1204 ev_tstamp ev_rt_now;
1205 #define VAR(name,decl) static decl;
1206 #include "ev_vars.h"
1207 #undef VAR
1208
1209 static int ev_default_loop_ptr;
1210
1211 #endif
1212
1213 #if EV_FEATURE_API
1214 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1215 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1216 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1217 #else
1218 # define EV_RELEASE_CB (void)0
1219 # define EV_ACQUIRE_CB (void)0
1220 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1221 #endif
1222
1223 #define EVBREAK_RECURSE 0x80
1224
1225 /*****************************************************************************/
1226
1227 #ifndef EV_HAVE_EV_TIME
1228 ev_tstamp
1229 ev_time (void)
1230 {
1231 #if EV_USE_REALTIME
1232 if (expect_true (have_realtime))
1233 {
1234 struct timespec ts;
1235 clock_gettime (CLOCK_REALTIME, &ts);
1236 return ts.tv_sec + ts.tv_nsec * 1e-9;
1237 }
1238 #endif
1239
1240 struct timeval tv;
1241 gettimeofday (&tv, 0);
1242 return tv.tv_sec + tv.tv_usec * 1e-6;
1243 }
1244 #endif
1245
1246 inline_size ev_tstamp
1247 get_clock (void)
1248 {
1249 #if EV_USE_MONOTONIC
1250 if (expect_true (have_monotonic))
1251 {
1252 struct timespec ts;
1253 clock_gettime (CLOCK_MONOTONIC, &ts);
1254 return ts.tv_sec + ts.tv_nsec * 1e-9;
1255 }
1256 #endif
1257
1258 return ev_time ();
1259 }
1260
1261 #if EV_MULTIPLICITY
1262 ev_tstamp
1263 ev_now (EV_P)
1264 {
1265 return ev_rt_now;
1266 }
1267 #endif
1268
1269 void
1270 ev_sleep (ev_tstamp delay)
1271 {
1272 if (delay > 0.)
1273 {
1274 #if EV_USE_NANOSLEEP
1275 struct timespec ts;
1276
1277 EV_TS_SET (ts, delay);
1278 nanosleep (&ts, 0);
1279 #elif defined(_WIN32)
1280 Sleep ((unsigned long)(delay * 1e3));
1281 #else
1282 struct timeval tv;
1283
1284 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1285 /* something not guaranteed by newer posix versions, but guaranteed */
1286 /* by older ones */
1287 EV_TV_SET (tv, delay);
1288 select (0, 0, 0, 0, &tv);
1289 #endif
1290 }
1291 }
1292
1293 /*****************************************************************************/
1294
1295 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1296
1297 /* find a suitable new size for the given array, */
1298 /* hopefully by rounding to a nice-to-malloc size */
1299 inline_size int
1300 array_nextsize (int elem, int cur, int cnt)
1301 {
1302 int ncur = cur + 1;
1303
1304 do
1305 ncur <<= 1;
1306 while (cnt > ncur);
1307
1308 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
1309 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1310 {
1311 ncur *= elem;
1312 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1313 ncur = ncur - sizeof (void *) * 4;
1314 ncur /= elem;
1315 }
1316
1317 return ncur;
1318 }
1319
1320 static void * noinline ecb_cold
1321 array_realloc (int elem, void *base, int *cur, int cnt)
1322 {
1323 *cur = array_nextsize (elem, *cur, cnt);
1324 return ev_realloc (base, elem * *cur);
1325 }
1326
1327 #define array_init_zero(base,count) \
1328 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1329
1330 #define array_needsize(type,base,cur,cnt,init) \
1331 if (expect_false ((cnt) > (cur))) \
1332 { \
1333 int ecb_unused ocur_ = (cur); \
1334 (base) = (type *)array_realloc \
1335 (sizeof (type), (base), &(cur), (cnt)); \
1336 init ((base) + (ocur_), (cur) - ocur_); \
1337 }
1338
1339 #if 0
1340 #define array_slim(type,stem) \
1341 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1342 { \
1343 stem ## max = array_roundsize (stem ## cnt >> 1); \
1344 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1345 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1346 }
1347 #endif
1348
1349 #define array_free(stem, idx) \
1350 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1351
1352 /*****************************************************************************/
1353
1354 /* dummy callback for pending events */
1355 static void noinline
1356 pendingcb (EV_P_ ev_prepare *w, int revents)
1357 {
1358 }
1359
1360 void noinline
1361 ev_feed_event (EV_P_ void *w, int revents)
1362 {
1363 W w_ = (W)w;
1364 int pri = ABSPRI (w_);
1365
1366 if (expect_false (w_->pending))
1367 pendings [pri][w_->pending - 1].events |= revents;
1368 else
1369 {
1370 w_->pending = ++pendingcnt [pri];
1371 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1372 pendings [pri][w_->pending - 1].w = w_;
1373 pendings [pri][w_->pending - 1].events = revents;
1374 }
1375 }
1376
1377 inline_speed void
1378 feed_reverse (EV_P_ W w)
1379 {
1380 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1381 rfeeds [rfeedcnt++] = w;
1382 }
1383
1384 inline_size void
1385 feed_reverse_done (EV_P_ int revents)
1386 {
1387 do
1388 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1389 while (rfeedcnt);
1390 }
1391
1392 inline_speed void
1393 queue_events (EV_P_ W *events, int eventcnt, int type)
1394 {
1395 int i;
1396
1397 for (i = 0; i < eventcnt; ++i)
1398 ev_feed_event (EV_A_ events [i], type);
1399 }
1400
1401 /*****************************************************************************/
1402
1403 inline_speed void
1404 fd_event_nocheck (EV_P_ int fd, int revents)
1405 {
1406 ANFD *anfd = anfds + fd;
1407 ev_io *w;
1408
1409 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1410 {
1411 int ev = w->events & revents;
1412
1413 if (ev)
1414 ev_feed_event (EV_A_ (W)w, ev);
1415 }
1416 }
1417
1418 /* do not submit kernel events for fds that have reify set */
1419 /* because that means they changed while we were polling for new events */
1420 inline_speed void
1421 fd_event (EV_P_ int fd, int revents)
1422 {
1423 ANFD *anfd = anfds + fd;
1424
1425 if (expect_true (!anfd->reify))
1426 fd_event_nocheck (EV_A_ fd, revents);
1427 }
1428
1429 void
1430 ev_feed_fd_event (EV_P_ int fd, int revents)
1431 {
1432 if (fd >= 0 && fd < anfdmax)
1433 fd_event_nocheck (EV_A_ fd, revents);
1434 }
1435
1436 /* make sure the external fd watch events are in-sync */
1437 /* with the kernel/libev internal state */
1438 inline_size void
1439 fd_reify (EV_P)
1440 {
1441 int i;
1442
1443 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1444 for (i = 0; i < fdchangecnt; ++i)
1445 {
1446 int fd = fdchanges [i];
1447 ANFD *anfd = anfds + fd;
1448
1449 if (anfd->reify & EV__IOFDSET && anfd->head)
1450 {
1451 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1452
1453 if (handle != anfd->handle)
1454 {
1455 unsigned long arg;
1456
1457 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1458
1459 /* handle changed, but fd didn't - we need to do it in two steps */
1460 backend_modify (EV_A_ fd, anfd->events, 0);
1461 anfd->events = 0;
1462 anfd->handle = handle;
1463 }
1464 }
1465 }
1466 #endif
1467
1468 for (i = 0; i < fdchangecnt; ++i)
1469 {
1470 int fd = fdchanges [i];
1471 ANFD *anfd = anfds + fd;
1472 ev_io *w;
1473
1474 unsigned char o_events = anfd->events;
1475 unsigned char o_reify = anfd->reify;
1476
1477 anfd->reify = 0;
1478
1479 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1480 {
1481 anfd->events = 0;
1482
1483 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1484 anfd->events |= (unsigned char)w->events;
1485
1486 if (o_events != anfd->events)
1487 o_reify = EV__IOFDSET; /* actually |= */
1488 }
1489
1490 if (o_reify & EV__IOFDSET)
1491 backend_modify (EV_A_ fd, o_events, anfd->events);
1492 }
1493
1494 fdchangecnt = 0;
1495 }
1496
1497 /* something about the given fd changed */
1498 inline_size void
1499 fd_change (EV_P_ int fd, int flags)
1500 {
1501 unsigned char reify = anfds [fd].reify;
1502 anfds [fd].reify |= flags;
1503
1504 if (expect_true (!reify))
1505 {
1506 ++fdchangecnt;
1507 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1508 fdchanges [fdchangecnt - 1] = fd;
1509 }
1510 }
1511
1512 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1513 inline_speed void ecb_cold
1514 fd_kill (EV_P_ int fd)
1515 {
1516 ev_io *w;
1517
1518 while ((w = (ev_io *)anfds [fd].head))
1519 {
1520 ev_io_stop (EV_A_ w);
1521 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1522 }
1523 }
1524
1525 /* check whether the given fd is actually valid, for error recovery */
1526 inline_size int ecb_cold
1527 fd_valid (int fd)
1528 {
1529 #ifdef _WIN32
1530 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1531 #else
1532 return fcntl (fd, F_GETFD) != -1;
1533 #endif
1534 }
1535
1536 /* called on EBADF to verify fds */
1537 static void noinline ecb_cold
1538 fd_ebadf (EV_P)
1539 {
1540 int fd;
1541
1542 for (fd = 0; fd < anfdmax; ++fd)
1543 if (anfds [fd].events)
1544 if (!fd_valid (fd) && errno == EBADF)
1545 fd_kill (EV_A_ fd);
1546 }
1547
1548 /* called on ENOMEM in select/poll to kill some fds and retry */
1549 static void noinline ecb_cold
1550 fd_enomem (EV_P)
1551 {
1552 int fd;
1553
1554 for (fd = anfdmax; fd--; )
1555 if (anfds [fd].events)
1556 {
1557 fd_kill (EV_A_ fd);
1558 break;
1559 }
1560 }
1561
1562 /* usually called after fork if backend needs to re-arm all fds from scratch */
1563 static void noinline
1564 fd_rearm_all (EV_P)
1565 {
1566 int fd;
1567
1568 for (fd = 0; fd < anfdmax; ++fd)
1569 if (anfds [fd].events)
1570 {
1571 anfds [fd].events = 0;
1572 anfds [fd].emask = 0;
1573 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1574 }
1575 }
1576
1577 /* used to prepare libev internal fd's */
1578 /* this is not fork-safe */
1579 inline_speed void
1580 fd_intern (int fd)
1581 {
1582 #ifdef _WIN32
1583 unsigned long arg = 1;
1584 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1585 #else
1586 fcntl (fd, F_SETFD, FD_CLOEXEC);
1587 fcntl (fd, F_SETFL, O_NONBLOCK);
1588 #endif
1589 }
1590
1591 /*****************************************************************************/
1592
1593 /*
1594 * the heap functions want a real array index. array index 0 is guaranteed to not
1595 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1596 * the branching factor of the d-tree.
1597 */
1598
1599 /*
1600 * at the moment we allow libev the luxury of two heaps,
1601 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1602 * which is more cache-efficient.
1603 * the difference is about 5% with 50000+ watchers.
1604 */
1605 #if EV_USE_4HEAP
1606
1607 #define DHEAP 4
1608 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1609 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1610 #define UPHEAP_DONE(p,k) ((p) == (k))
1611
1612 /* away from the root */
1613 inline_speed void
1614 downheap (ANHE *heap, int N, int k)
1615 {
1616 ANHE he = heap [k];
1617 ANHE *E = heap + N + HEAP0;
1618
1619 for (;;)
1620 {
1621 ev_tstamp minat;
1622 ANHE *minpos;
1623 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1624
1625 /* find minimum child */
1626 if (expect_true (pos + DHEAP - 1 < E))
1627 {
1628 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1629 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1630 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1631 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1632 }
1633 else if (pos < E)
1634 {
1635 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1636 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1637 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1638 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1639 }
1640 else
1641 break;
1642
1643 if (ANHE_at (he) <= minat)
1644 break;
1645
1646 heap [k] = *minpos;
1647 ev_active (ANHE_w (*minpos)) = k;
1648
1649 k = minpos - heap;
1650 }
1651
1652 heap [k] = he;
1653 ev_active (ANHE_w (he)) = k;
1654 }
1655
1656 #else /* 4HEAP */
1657
1658 #define HEAP0 1
1659 #define HPARENT(k) ((k) >> 1)
1660 #define UPHEAP_DONE(p,k) (!(p))
1661
1662 /* away from the root */
1663 inline_speed void
1664 downheap (ANHE *heap, int N, int k)
1665 {
1666 ANHE he = heap [k];
1667
1668 for (;;)
1669 {
1670 int c = k << 1;
1671
1672 if (c >= N + HEAP0)
1673 break;
1674
1675 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1676 ? 1 : 0;
1677
1678 if (ANHE_at (he) <= ANHE_at (heap [c]))
1679 break;
1680
1681 heap [k] = heap [c];
1682 ev_active (ANHE_w (heap [k])) = k;
1683
1684 k = c;
1685 }
1686
1687 heap [k] = he;
1688 ev_active (ANHE_w (he)) = k;
1689 }
1690 #endif
1691
1692 /* towards the root */
1693 inline_speed void
1694 upheap (ANHE *heap, int k)
1695 {
1696 ANHE he = heap [k];
1697
1698 for (;;)
1699 {
1700 int p = HPARENT (k);
1701
1702 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1703 break;
1704
1705 heap [k] = heap [p];
1706 ev_active (ANHE_w (heap [k])) = k;
1707 k = p;
1708 }
1709
1710 heap [k] = he;
1711 ev_active (ANHE_w (he)) = k;
1712 }
1713
1714 /* move an element suitably so it is in a correct place */
1715 inline_size void
1716 adjustheap (ANHE *heap, int N, int k)
1717 {
1718 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1719 upheap (heap, k);
1720 else
1721 downheap (heap, N, k);
1722 }
1723
1724 /* rebuild the heap: this function is used only once and executed rarely */
1725 inline_size void
1726 reheap (ANHE *heap, int N)
1727 {
1728 int i;
1729
1730 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1731 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1732 for (i = 0; i < N; ++i)
1733 upheap (heap, i + HEAP0);
1734 }
1735
1736 /*****************************************************************************/
1737
1738 /* associate signal watchers to a signal signal */
1739 typedef struct
1740 {
1741 EV_ATOMIC_T pending;
1742 #if EV_MULTIPLICITY
1743 EV_P;
1744 #endif
1745 WL head;
1746 } ANSIG;
1747
1748 static ANSIG signals [EV_NSIG - 1];
1749
1750 /*****************************************************************************/
1751
1752 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1753
1754 static void noinline ecb_cold
1755 evpipe_init (EV_P)
1756 {
1757 if (!ev_is_active (&pipe_w))
1758 {
1759 # if EV_USE_EVENTFD
1760 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1761 if (evfd < 0 && errno == EINVAL)
1762 evfd = eventfd (0, 0);
1763
1764 if (evfd >= 0)
1765 {
1766 evpipe [0] = -1;
1767 fd_intern (evfd); /* doing it twice doesn't hurt */
1768 ev_io_set (&pipe_w, evfd, EV_READ);
1769 }
1770 else
1771 # endif
1772 {
1773 while (pipe (evpipe))
1774 ev_syserr ("(libev) error creating signal/async pipe");
1775
1776 fd_intern (evpipe [0]);
1777 fd_intern (evpipe [1]);
1778 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1779 }
1780
1781 ev_io_start (EV_A_ &pipe_w);
1782 ev_unref (EV_A); /* watcher should not keep loop alive */
1783 }
1784 }
1785
1786 inline_speed void
1787 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1788 {
1789 if (expect_true (*flag))
1790 return;
1791
1792 *flag = 1;
1793
1794 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1795
1796 pipe_write_skipped = 1;
1797
1798 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1799
1800 if (pipe_write_wanted)
1801 {
1802 int old_errno;
1803
1804 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1805
1806 old_errno = errno; /* save errno because write will clobber it */
1807
1808 #if EV_USE_EVENTFD
1809 if (evfd >= 0)
1810 {
1811 uint64_t counter = 1;
1812 write (evfd, &counter, sizeof (uint64_t));
1813 }
1814 else
1815 #endif
1816 {
1817 /* win32 people keep sending patches that change this write() to send() */
1818 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1819 /* so when you think this write should be a send instead, please find out */
1820 /* where your send() is from - it's definitely not the microsoft send, and */
1821 /* tell me. thank you. */
1822 write (evpipe [1], &(evpipe [1]), 1);
1823 }
1824
1825 errno = old_errno;
1826 }
1827 }
1828
1829 /* called whenever the libev signal pipe */
1830 /* got some events (signal, async) */
1831 static void
1832 pipecb (EV_P_ ev_io *iow, int revents)
1833 {
1834 int i;
1835
1836 if (revents & EV_READ)
1837 {
1838 #if EV_USE_EVENTFD
1839 if (evfd >= 0)
1840 {
1841 uint64_t counter;
1842 read (evfd, &counter, sizeof (uint64_t));
1843 }
1844 else
1845 #endif
1846 {
1847 char dummy;
1848 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1849 read (evpipe [0], &dummy, 1);
1850 }
1851 }
1852
1853 pipe_write_skipped = 0;
1854
1855 #if EV_SIGNAL_ENABLE
1856 if (sig_pending)
1857 {
1858 sig_pending = 0;
1859
1860 for (i = EV_NSIG - 1; i--; )
1861 if (expect_false (signals [i].pending))
1862 ev_feed_signal_event (EV_A_ i + 1);
1863 }
1864 #endif
1865
1866 #if EV_ASYNC_ENABLE
1867 if (async_pending)
1868 {
1869 async_pending = 0;
1870
1871 for (i = asynccnt; i--; )
1872 if (asyncs [i]->sent)
1873 {
1874 asyncs [i]->sent = 0;
1875 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1876 }
1877 }
1878 #endif
1879 }
1880
1881 /*****************************************************************************/
1882
1883 void
1884 ev_feed_signal (int signum)
1885 {
1886 #if EV_MULTIPLICITY
1887 EV_P = signals [signum - 1].loop;
1888
1889 if (!EV_A)
1890 return;
1891 #endif
1892
1893 if (!ev_active (&pipe_w))
1894 return;
1895
1896 signals [signum - 1].pending = 1;
1897 evpipe_write (EV_A_ &sig_pending);
1898 }
1899
1900 static void
1901 ev_sighandler (int signum)
1902 {
1903 #ifdef _WIN32
1904 signal (signum, ev_sighandler);
1905 #endif
1906
1907 ev_feed_signal (signum);
1908 }
1909
1910 void noinline
1911 ev_feed_signal_event (EV_P_ int signum)
1912 {
1913 WL w;
1914
1915 if (expect_false (signum <= 0 || signum > EV_NSIG))
1916 return;
1917
1918 --signum;
1919
1920 #if EV_MULTIPLICITY
1921 /* it is permissible to try to feed a signal to the wrong loop */
1922 /* or, likely more useful, feeding a signal nobody is waiting for */
1923
1924 if (expect_false (signals [signum].loop != EV_A))
1925 return;
1926 #endif
1927
1928 signals [signum].pending = 0;
1929
1930 for (w = signals [signum].head; w; w = w->next)
1931 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1932 }
1933
1934 #if EV_USE_SIGNALFD
1935 static void
1936 sigfdcb (EV_P_ ev_io *iow, int revents)
1937 {
1938 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1939
1940 for (;;)
1941 {
1942 ssize_t res = read (sigfd, si, sizeof (si));
1943
1944 /* not ISO-C, as res might be -1, but works with SuS */
1945 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1946 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1947
1948 if (res < (ssize_t)sizeof (si))
1949 break;
1950 }
1951 }
1952 #endif
1953
1954 #endif
1955
1956 /*****************************************************************************/
1957
1958 #if EV_CHILD_ENABLE
1959 static WL childs [EV_PID_HASHSIZE];
1960
1961 static ev_signal childev;
1962
1963 #ifndef WIFCONTINUED
1964 # define WIFCONTINUED(status) 0
1965 #endif
1966
1967 /* handle a single child status event */
1968 inline_speed void
1969 child_reap (EV_P_ int chain, int pid, int status)
1970 {
1971 ev_child *w;
1972 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1973
1974 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1975 {
1976 if ((w->pid == pid || !w->pid)
1977 && (!traced || (w->flags & 1)))
1978 {
1979 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1980 w->rpid = pid;
1981 w->rstatus = status;
1982 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1983 }
1984 }
1985 }
1986
1987 #ifndef WCONTINUED
1988 # define WCONTINUED 0
1989 #endif
1990
1991 /* called on sigchld etc., calls waitpid */
1992 static void
1993 childcb (EV_P_ ev_signal *sw, int revents)
1994 {
1995 int pid, status;
1996
1997 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1998 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1999 if (!WCONTINUED
2000 || errno != EINVAL
2001 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2002 return;
2003
2004 /* make sure we are called again until all children have been reaped */
2005 /* we need to do it this way so that the callback gets called before we continue */
2006 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2007
2008 child_reap (EV_A_ pid, pid, status);
2009 if ((EV_PID_HASHSIZE) > 1)
2010 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2011 }
2012
2013 #endif
2014
2015 /*****************************************************************************/
2016
2017 #if EV_USE_IOCP
2018 # include "ev_iocp.c"
2019 #endif
2020 #if EV_USE_PORT
2021 # include "ev_port.c"
2022 #endif
2023 #if EV_USE_KQUEUE
2024 # include "ev_kqueue.c"
2025 #endif
2026 #if EV_USE_EPOLL
2027 # include "ev_epoll.c"
2028 #endif
2029 #if EV_USE_POLL
2030 # include "ev_poll.c"
2031 #endif
2032 #if EV_USE_SELECT
2033 # include "ev_select.c"
2034 #endif
2035
2036 int ecb_cold
2037 ev_version_major (void)
2038 {
2039 return EV_VERSION_MAJOR;
2040 }
2041
2042 int ecb_cold
2043 ev_version_minor (void)
2044 {
2045 return EV_VERSION_MINOR;
2046 }
2047
2048 /* return true if we are running with elevated privileges and should ignore env variables */
2049 int inline_size ecb_cold
2050 enable_secure (void)
2051 {
2052 #ifdef _WIN32
2053 return 0;
2054 #else
2055 return getuid () != geteuid ()
2056 || getgid () != getegid ();
2057 #endif
2058 }
2059
2060 unsigned int ecb_cold
2061 ev_supported_backends (void)
2062 {
2063 unsigned int flags = 0;
2064
2065 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2066 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2067 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2068 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2069 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2070
2071 return flags;
2072 }
2073
2074 unsigned int ecb_cold
2075 ev_recommended_backends (void)
2076 {
2077 unsigned int flags = ev_supported_backends ();
2078
2079 #ifndef __NetBSD__
2080 /* kqueue is borked on everything but netbsd apparently */
2081 /* it usually doesn't work correctly on anything but sockets and pipes */
2082 flags &= ~EVBACKEND_KQUEUE;
2083 #endif
2084 #ifdef __APPLE__
2085 /* only select works correctly on that "unix-certified" platform */
2086 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2087 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2088 #endif
2089 #ifdef __FreeBSD__
2090 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2091 #endif
2092
2093 return flags;
2094 }
2095
2096 unsigned int ecb_cold
2097 ev_embeddable_backends (void)
2098 {
2099 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2100
2101 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2102 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2103 flags &= ~EVBACKEND_EPOLL;
2104
2105 return flags;
2106 }
2107
2108 unsigned int
2109 ev_backend (EV_P)
2110 {
2111 return backend;
2112 }
2113
2114 #if EV_FEATURE_API
2115 unsigned int
2116 ev_iteration (EV_P)
2117 {
2118 return loop_count;
2119 }
2120
2121 unsigned int
2122 ev_depth (EV_P)
2123 {
2124 return loop_depth;
2125 }
2126
2127 void
2128 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2129 {
2130 io_blocktime = interval;
2131 }
2132
2133 void
2134 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2135 {
2136 timeout_blocktime = interval;
2137 }
2138
2139 void
2140 ev_set_userdata (EV_P_ void *data)
2141 {
2142 userdata = data;
2143 }
2144
2145 void *
2146 ev_userdata (EV_P)
2147 {
2148 return userdata;
2149 }
2150
2151 void
2152 ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2153 {
2154 invoke_cb = invoke_pending_cb;
2155 }
2156
2157 void
2158 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2159 {
2160 release_cb = release;
2161 acquire_cb = acquire;
2162 }
2163 #endif
2164
2165 /* initialise a loop structure, must be zero-initialised */
2166 static void noinline ecb_cold
2167 loop_init (EV_P_ unsigned int flags)
2168 {
2169 if (!backend)
2170 {
2171 origflags = flags;
2172
2173 #if EV_USE_REALTIME
2174 if (!have_realtime)
2175 {
2176 struct timespec ts;
2177
2178 if (!clock_gettime (CLOCK_REALTIME, &ts))
2179 have_realtime = 1;
2180 }
2181 #endif
2182
2183 #if EV_USE_MONOTONIC
2184 if (!have_monotonic)
2185 {
2186 struct timespec ts;
2187
2188 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2189 have_monotonic = 1;
2190 }
2191 #endif
2192
2193 /* pid check not overridable via env */
2194 #ifndef _WIN32
2195 if (flags & EVFLAG_FORKCHECK)
2196 curpid = getpid ();
2197 #endif
2198
2199 if (!(flags & EVFLAG_NOENV)
2200 && !enable_secure ()
2201 && getenv ("LIBEV_FLAGS"))
2202 flags = atoi (getenv ("LIBEV_FLAGS"));
2203
2204 ev_rt_now = ev_time ();
2205 mn_now = get_clock ();
2206 now_floor = mn_now;
2207 rtmn_diff = ev_rt_now - mn_now;
2208 #if EV_FEATURE_API
2209 invoke_cb = ev_invoke_pending;
2210 #endif
2211
2212 io_blocktime = 0.;
2213 timeout_blocktime = 0.;
2214 backend = 0;
2215 backend_fd = -1;
2216 sig_pending = 0;
2217 #if EV_ASYNC_ENABLE
2218 async_pending = 0;
2219 #endif
2220 pipe_write_skipped = 0;
2221 pipe_write_wanted = 0;
2222 #if EV_USE_INOTIFY
2223 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2224 #endif
2225 #if EV_USE_SIGNALFD
2226 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2227 #endif
2228
2229 if (!(flags & EVBACKEND_MASK))
2230 flags |= ev_recommended_backends ();
2231
2232 #if EV_USE_IOCP
2233 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2234 #endif
2235 #if EV_USE_PORT
2236 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2237 #endif
2238 #if EV_USE_KQUEUE
2239 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2240 #endif
2241 #if EV_USE_EPOLL
2242 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2243 #endif
2244 #if EV_USE_POLL
2245 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2246 #endif
2247 #if EV_USE_SELECT
2248 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2249 #endif
2250
2251 ev_prepare_init (&pending_w, pendingcb);
2252
2253 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2254 ev_init (&pipe_w, pipecb);
2255 ev_set_priority (&pipe_w, EV_MAXPRI);
2256 #endif
2257 }
2258 }
2259
2260 /* free up a loop structure */
2261 void ecb_cold
2262 ev_loop_destroy (EV_P)
2263 {
2264 int i;
2265
2266 #if EV_MULTIPLICITY
2267 /* mimic free (0) */
2268 if (!EV_A)
2269 return;
2270 #endif
2271
2272 #if EV_CLEANUP_ENABLE
2273 /* queue cleanup watchers (and execute them) */
2274 if (expect_false (cleanupcnt))
2275 {
2276 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2277 EV_INVOKE_PENDING;
2278 }
2279 #endif
2280
2281 #if EV_CHILD_ENABLE
2282 if (ev_is_active (&childev))
2283 {
2284 ev_ref (EV_A); /* child watcher */
2285 ev_signal_stop (EV_A_ &childev);
2286 }
2287 #endif
2288
2289 if (ev_is_active (&pipe_w))
2290 {
2291 /*ev_ref (EV_A);*/
2292 /*ev_io_stop (EV_A_ &pipe_w);*/
2293
2294 #if EV_USE_EVENTFD
2295 if (evfd >= 0)
2296 close (evfd);
2297 #endif
2298
2299 if (evpipe [0] >= 0)
2300 {
2301 EV_WIN32_CLOSE_FD (evpipe [0]);
2302 EV_WIN32_CLOSE_FD (evpipe [1]);
2303 }
2304 }
2305
2306 #if EV_USE_SIGNALFD
2307 if (ev_is_active (&sigfd_w))
2308 close (sigfd);
2309 #endif
2310
2311 #if EV_USE_INOTIFY
2312 if (fs_fd >= 0)
2313 close (fs_fd);
2314 #endif
2315
2316 if (backend_fd >= 0)
2317 close (backend_fd);
2318
2319 #if EV_USE_IOCP
2320 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2321 #endif
2322 #if EV_USE_PORT
2323 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2324 #endif
2325 #if EV_USE_KQUEUE
2326 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2327 #endif
2328 #if EV_USE_EPOLL
2329 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2330 #endif
2331 #if EV_USE_POLL
2332 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2333 #endif
2334 #if EV_USE_SELECT
2335 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2336 #endif
2337
2338 for (i = NUMPRI; i--; )
2339 {
2340 array_free (pending, [i]);
2341 #if EV_IDLE_ENABLE
2342 array_free (idle, [i]);
2343 #endif
2344 }
2345
2346 ev_free (anfds); anfds = 0; anfdmax = 0;
2347
2348 /* have to use the microsoft-never-gets-it-right macro */
2349 array_free (rfeed, EMPTY);
2350 array_free (fdchange, EMPTY);
2351 array_free (timer, EMPTY);
2352 #if EV_PERIODIC_ENABLE
2353 array_free (periodic, EMPTY);
2354 #endif
2355 #if EV_FORK_ENABLE
2356 array_free (fork, EMPTY);
2357 #endif
2358 #if EV_CLEANUP_ENABLE
2359 array_free (cleanup, EMPTY);
2360 #endif
2361 array_free (prepare, EMPTY);
2362 array_free (check, EMPTY);
2363 #if EV_ASYNC_ENABLE
2364 array_free (async, EMPTY);
2365 #endif
2366
2367 backend = 0;
2368
2369 #if EV_MULTIPLICITY
2370 if (ev_is_default_loop (EV_A))
2371 #endif
2372 ev_default_loop_ptr = 0;
2373 #if EV_MULTIPLICITY
2374 else
2375 ev_free (EV_A);
2376 #endif
2377 }
2378
2379 #if EV_USE_INOTIFY
2380 inline_size void infy_fork (EV_P);
2381 #endif
2382
2383 inline_size void
2384 loop_fork (EV_P)
2385 {
2386 #if EV_USE_PORT
2387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2388 #endif
2389 #if EV_USE_KQUEUE
2390 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2391 #endif
2392 #if EV_USE_EPOLL
2393 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2394 #endif
2395 #if EV_USE_INOTIFY
2396 infy_fork (EV_A);
2397 #endif
2398
2399 if (ev_is_active (&pipe_w))
2400 {
2401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2402
2403 ev_ref (EV_A);
2404 ev_io_stop (EV_A_ &pipe_w);
2405
2406 #if EV_USE_EVENTFD
2407 if (evfd >= 0)
2408 close (evfd);
2409 #endif
2410
2411 if (evpipe [0] >= 0)
2412 {
2413 EV_WIN32_CLOSE_FD (evpipe [0]);
2414 EV_WIN32_CLOSE_FD (evpipe [1]);
2415 }
2416
2417 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2418 evpipe_init (EV_A);
2419 /* now iterate over everything, in case we missed something */
2420 pipecb (EV_A_ &pipe_w, EV_READ);
2421 #endif
2422 }
2423
2424 postfork = 0;
2425 }
2426
2427 #if EV_MULTIPLICITY
2428
2429 struct ev_loop * ecb_cold
2430 ev_loop_new (unsigned int flags)
2431 {
2432 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2433
2434 memset (EV_A, 0, sizeof (struct ev_loop));
2435 loop_init (EV_A_ flags);
2436
2437 if (ev_backend (EV_A))
2438 return EV_A;
2439
2440 ev_free (EV_A);
2441 return 0;
2442 }
2443
2444 #endif /* multiplicity */
2445
2446 #if EV_VERIFY
2447 static void noinline ecb_cold
2448 verify_watcher (EV_P_ W w)
2449 {
2450 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2451
2452 if (w->pending)
2453 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2454 }
2455
2456 static void noinline ecb_cold
2457 verify_heap (EV_P_ ANHE *heap, int N)
2458 {
2459 int i;
2460
2461 for (i = HEAP0; i < N + HEAP0; ++i)
2462 {
2463 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2464 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2465 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2466
2467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2468 }
2469 }
2470
2471 static void noinline ecb_cold
2472 array_verify (EV_P_ W *ws, int cnt)
2473 {
2474 while (cnt--)
2475 {
2476 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2477 verify_watcher (EV_A_ ws [cnt]);
2478 }
2479 }
2480 #endif
2481
2482 #if EV_FEATURE_API
2483 void ecb_cold
2484 ev_verify (EV_P)
2485 {
2486 #if EV_VERIFY
2487 int i;
2488 WL w;
2489
2490 assert (activecnt >= -1);
2491
2492 assert (fdchangemax >= fdchangecnt);
2493 for (i = 0; i < fdchangecnt; ++i)
2494 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2495
2496 assert (anfdmax >= 0);
2497 for (i = 0; i < anfdmax; ++i)
2498 for (w = anfds [i].head; w; w = w->next)
2499 {
2500 verify_watcher (EV_A_ (W)w);
2501 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2502 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2503 }
2504
2505 assert (timermax >= timercnt);
2506 verify_heap (EV_A_ timers, timercnt);
2507
2508 #if EV_PERIODIC_ENABLE
2509 assert (periodicmax >= periodiccnt);
2510 verify_heap (EV_A_ periodics, periodiccnt);
2511 #endif
2512
2513 for (i = NUMPRI; i--; )
2514 {
2515 assert (pendingmax [i] >= pendingcnt [i]);
2516 #if EV_IDLE_ENABLE
2517 assert (idleall >= 0);
2518 assert (idlemax [i] >= idlecnt [i]);
2519 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2520 #endif
2521 }
2522
2523 #if EV_FORK_ENABLE
2524 assert (forkmax >= forkcnt);
2525 array_verify (EV_A_ (W *)forks, forkcnt);
2526 #endif
2527
2528 #if EV_CLEANUP_ENABLE
2529 assert (cleanupmax >= cleanupcnt);
2530 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2531 #endif
2532
2533 #if EV_ASYNC_ENABLE
2534 assert (asyncmax >= asynccnt);
2535 array_verify (EV_A_ (W *)asyncs, asynccnt);
2536 #endif
2537
2538 #if EV_PREPARE_ENABLE
2539 assert (preparemax >= preparecnt);
2540 array_verify (EV_A_ (W *)prepares, preparecnt);
2541 #endif
2542
2543 #if EV_CHECK_ENABLE
2544 assert (checkmax >= checkcnt);
2545 array_verify (EV_A_ (W *)checks, checkcnt);
2546 #endif
2547
2548 # if 0
2549 #if EV_CHILD_ENABLE
2550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2551 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2552 #endif
2553 # endif
2554 #endif
2555 }
2556 #endif
2557
2558 #if EV_MULTIPLICITY
2559 struct ev_loop * ecb_cold
2560 #else
2561 int
2562 #endif
2563 ev_default_loop (unsigned int flags)
2564 {
2565 if (!ev_default_loop_ptr)
2566 {
2567 #if EV_MULTIPLICITY
2568 EV_P = ev_default_loop_ptr = &default_loop_struct;
2569 #else
2570 ev_default_loop_ptr = 1;
2571 #endif
2572
2573 loop_init (EV_A_ flags);
2574
2575 if (ev_backend (EV_A))
2576 {
2577 #if EV_CHILD_ENABLE
2578 ev_signal_init (&childev, childcb, SIGCHLD);
2579 ev_set_priority (&childev, EV_MAXPRI);
2580 ev_signal_start (EV_A_ &childev);
2581 ev_unref (EV_A); /* child watcher should not keep loop alive */
2582 #endif
2583 }
2584 else
2585 ev_default_loop_ptr = 0;
2586 }
2587
2588 return ev_default_loop_ptr;
2589 }
2590
2591 void
2592 ev_loop_fork (EV_P)
2593 {
2594 postfork = 1; /* must be in line with ev_default_fork */
2595 }
2596
2597 /*****************************************************************************/
2598
2599 void
2600 ev_invoke (EV_P_ void *w, int revents)
2601 {
2602 EV_CB_INVOKE ((W)w, revents);
2603 }
2604
2605 unsigned int
2606 ev_pending_count (EV_P)
2607 {
2608 int pri;
2609 unsigned int count = 0;
2610
2611 for (pri = NUMPRI; pri--; )
2612 count += pendingcnt [pri];
2613
2614 return count;
2615 }
2616
2617 void noinline
2618 ev_invoke_pending (EV_P)
2619 {
2620 int pri;
2621
2622 for (pri = NUMPRI; pri--; )
2623 while (pendingcnt [pri])
2624 {
2625 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2626
2627 p->w->pending = 0;
2628 EV_CB_INVOKE (p->w, p->events);
2629 EV_FREQUENT_CHECK;
2630 }
2631 }
2632
2633 #if EV_IDLE_ENABLE
2634 /* make idle watchers pending. this handles the "call-idle */
2635 /* only when higher priorities are idle" logic */
2636 inline_size void
2637 idle_reify (EV_P)
2638 {
2639 if (expect_false (idleall))
2640 {
2641 int pri;
2642
2643 for (pri = NUMPRI; pri--; )
2644 {
2645 if (pendingcnt [pri])
2646 break;
2647
2648 if (idlecnt [pri])
2649 {
2650 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2651 break;
2652 }
2653 }
2654 }
2655 }
2656 #endif
2657
2658 /* make timers pending */
2659 inline_size void
2660 timers_reify (EV_P)
2661 {
2662 EV_FREQUENT_CHECK;
2663
2664 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2665 {
2666 do
2667 {
2668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2669
2670 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2671
2672 /* first reschedule or stop timer */
2673 if (w->repeat)
2674 {
2675 ev_at (w) += w->repeat;
2676 if (ev_at (w) < mn_now)
2677 ev_at (w) = mn_now;
2678
2679 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2680
2681 ANHE_at_cache (timers [HEAP0]);
2682 downheap (timers, timercnt, HEAP0);
2683 }
2684 else
2685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2686
2687 EV_FREQUENT_CHECK;
2688 feed_reverse (EV_A_ (W)w);
2689 }
2690 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2691
2692 feed_reverse_done (EV_A_ EV_TIMER);
2693 }
2694 }
2695
2696 #if EV_PERIODIC_ENABLE
2697
2698 static void noinline
2699 periodic_recalc (EV_P_ ev_periodic *w)
2700 {
2701 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2702 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2703
2704 /* the above almost always errs on the low side */
2705 while (at <= ev_rt_now)
2706 {
2707 ev_tstamp nat = at + w->interval;
2708
2709 /* when resolution fails us, we use ev_rt_now */
2710 if (expect_false (nat == at))
2711 {
2712 at = ev_rt_now;
2713 break;
2714 }
2715
2716 at = nat;
2717 }
2718
2719 ev_at (w) = at;
2720 }
2721
2722 /* make periodics pending */
2723 inline_size void
2724 periodics_reify (EV_P)
2725 {
2726 EV_FREQUENT_CHECK;
2727
2728 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2729 {
2730 int feed_count = 0;
2731
2732 do
2733 {
2734 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2735
2736 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2737
2738 /* first reschedule or stop timer */
2739 if (w->reschedule_cb)
2740 {
2741 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2742
2743 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2744
2745 ANHE_at_cache (periodics [HEAP0]);
2746 downheap (periodics, periodiccnt, HEAP0);
2747 }
2748 else if (w->interval)
2749 {
2750 periodic_recalc (EV_A_ w);
2751 ANHE_at_cache (periodics [HEAP0]);
2752 downheap (periodics, periodiccnt, HEAP0);
2753 }
2754 else
2755 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2756
2757 EV_FREQUENT_CHECK;
2758 feed_reverse (EV_A_ (W)w);
2759 }
2760 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2761
2762 feed_reverse_done (EV_A_ EV_PERIODIC);
2763 }
2764 }
2765
2766 /* simply recalculate all periodics */
2767 /* TODO: maybe ensure that at least one event happens when jumping forward? */
2768 static void noinline ecb_cold
2769 periodics_reschedule (EV_P)
2770 {
2771 int i;
2772
2773 /* adjust periodics after time jump */
2774 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2775 {
2776 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2777
2778 if (w->reschedule_cb)
2779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2780 else if (w->interval)
2781 periodic_recalc (EV_A_ w);
2782
2783 ANHE_at_cache (periodics [i]);
2784 }
2785
2786 reheap (periodics, periodiccnt);
2787 }
2788 #endif
2789
2790 /* adjust all timers by a given offset */
2791 static void noinline ecb_cold
2792 timers_reschedule (EV_P_ ev_tstamp adjust)
2793 {
2794 int i;
2795
2796 for (i = 0; i < timercnt; ++i)
2797 {
2798 ANHE *he = timers + i + HEAP0;
2799 ANHE_w (*he)->at += adjust;
2800 ANHE_at_cache (*he);
2801 }
2802 }
2803
2804 /* fetch new monotonic and realtime times from the kernel */
2805 /* also detect if there was a timejump, and act accordingly */
2806 inline_speed void
2807 time_update (EV_P_ ev_tstamp max_block)
2808 {
2809 #if EV_USE_MONOTONIC
2810 if (expect_true (have_monotonic))
2811 {
2812 int i;
2813 ev_tstamp odiff = rtmn_diff;
2814
2815 mn_now = get_clock ();
2816
2817 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2818 /* interpolate in the meantime */
2819 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2820 {
2821 ev_rt_now = rtmn_diff + mn_now;
2822 return;
2823 }
2824
2825 now_floor = mn_now;
2826 ev_rt_now = ev_time ();
2827
2828 /* loop a few times, before making important decisions.
2829 * on the choice of "4": one iteration isn't enough,
2830 * in case we get preempted during the calls to
2831 * ev_time and get_clock. a second call is almost guaranteed
2832 * to succeed in that case, though. and looping a few more times
2833 * doesn't hurt either as we only do this on time-jumps or
2834 * in the unlikely event of having been preempted here.
2835 */
2836 for (i = 4; --i; )
2837 {
2838 ev_tstamp diff;
2839 rtmn_diff = ev_rt_now - mn_now;
2840
2841 diff = odiff - rtmn_diff;
2842
2843 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2844 return; /* all is well */
2845
2846 ev_rt_now = ev_time ();
2847 mn_now = get_clock ();
2848 now_floor = mn_now;
2849 }
2850
2851 /* no timer adjustment, as the monotonic clock doesn't jump */
2852 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2853 # if EV_PERIODIC_ENABLE
2854 periodics_reschedule (EV_A);
2855 # endif
2856 }
2857 else
2858 #endif
2859 {
2860 ev_rt_now = ev_time ();
2861
2862 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2863 {
2864 /* adjust timers. this is easy, as the offset is the same for all of them */
2865 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2866 #if EV_PERIODIC_ENABLE
2867 periodics_reschedule (EV_A);
2868 #endif
2869 }
2870
2871 mn_now = ev_rt_now;
2872 }
2873 }
2874
2875 void
2876 ev_run (EV_P_ int flags)
2877 {
2878 #if EV_FEATURE_API
2879 ++loop_depth;
2880 #endif
2881
2882 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2883
2884 loop_done = EVBREAK_CANCEL;
2885
2886 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2887
2888 do
2889 {
2890 #if EV_VERIFY >= 2
2891 ev_verify (EV_A);
2892 #endif
2893
2894 #ifndef _WIN32
2895 if (expect_false (curpid)) /* penalise the forking check even more */
2896 if (expect_false (getpid () != curpid))
2897 {
2898 curpid = getpid ();
2899 postfork = 1;
2900 }
2901 #endif
2902
2903 #if EV_FORK_ENABLE
2904 /* we might have forked, so queue fork handlers */
2905 if (expect_false (postfork))
2906 if (forkcnt)
2907 {
2908 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2909 EV_INVOKE_PENDING;
2910 }
2911 #endif
2912
2913 #if EV_PREPARE_ENABLE
2914 /* queue prepare watchers (and execute them) */
2915 if (expect_false (preparecnt))
2916 {
2917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2918 EV_INVOKE_PENDING;
2919 }
2920 #endif
2921
2922 if (expect_false (loop_done))
2923 break;
2924
2925 /* we might have forked, so reify kernel state if necessary */
2926 if (expect_false (postfork))
2927 loop_fork (EV_A);
2928
2929 /* update fd-related kernel structures */
2930 fd_reify (EV_A);
2931
2932 /* calculate blocking time */
2933 {
2934 ev_tstamp waittime = 0.;
2935 ev_tstamp sleeptime = 0.;
2936
2937 /* remember old timestamp for io_blocktime calculation */
2938 ev_tstamp prev_mn_now = mn_now;
2939
2940 /* update time to cancel out callback processing overhead */
2941 time_update (EV_A_ 1e100);
2942
2943 /* from now on, we want a pipe-wake-up */
2944 pipe_write_wanted = 1;
2945
2946 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2947
2948 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2949 {
2950 waittime = MAX_BLOCKTIME;
2951
2952 if (timercnt)
2953 {
2954 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2955 if (waittime > to) waittime = to;
2956 }
2957
2958 #if EV_PERIODIC_ENABLE
2959 if (periodiccnt)
2960 {
2961 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2962 if (waittime > to) waittime = to;
2963 }
2964 #endif
2965
2966 /* don't let timeouts decrease the waittime below timeout_blocktime */
2967 if (expect_false (waittime < timeout_blocktime))
2968 waittime = timeout_blocktime;
2969
2970 /* at this point, we NEED to wait, so we have to ensure */
2971 /* to pass a minimum nonzero value to the backend */
2972 if (expect_false (waittime < backend_mintime))
2973 waittime = backend_mintime;
2974
2975 /* extra check because io_blocktime is commonly 0 */
2976 if (expect_false (io_blocktime))
2977 {
2978 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2979
2980 if (sleeptime > waittime - backend_mintime)
2981 sleeptime = waittime - backend_mintime;
2982
2983 if (expect_true (sleeptime > 0.))
2984 {
2985 ev_sleep (sleeptime);
2986 waittime -= sleeptime;
2987 }
2988 }
2989 }
2990
2991 #if EV_FEATURE_API
2992 ++loop_count;
2993 #endif
2994 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2995 backend_poll (EV_A_ waittime);
2996 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2997
2998 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2999
3000 if (pipe_write_skipped)
3001 {
3002 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3003 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3004 }
3005
3006
3007 /* update ev_rt_now, do magic */
3008 time_update (EV_A_ waittime + sleeptime);
3009 }
3010
3011 /* queue pending timers and reschedule them */
3012 timers_reify (EV_A); /* relative timers called last */
3013 #if EV_PERIODIC_ENABLE
3014 periodics_reify (EV_A); /* absolute timers called first */
3015 #endif
3016
3017 #if EV_IDLE_ENABLE
3018 /* queue idle watchers unless other events are pending */
3019 idle_reify (EV_A);
3020 #endif
3021
3022 #if EV_CHECK_ENABLE
3023 /* queue check watchers, to be executed first */
3024 if (expect_false (checkcnt))
3025 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3026 #endif
3027
3028 EV_INVOKE_PENDING;
3029 }
3030 while (expect_true (
3031 activecnt
3032 && !loop_done
3033 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3034 ));
3035
3036 if (loop_done == EVBREAK_ONE)
3037 loop_done = EVBREAK_CANCEL;
3038
3039 #if EV_FEATURE_API
3040 --loop_depth;
3041 #endif
3042 }
3043
3044 void
3045 ev_break (EV_P_ int how)
3046 {
3047 loop_done = how;
3048 }
3049
3050 void
3051 ev_ref (EV_P)
3052 {
3053 ++activecnt;
3054 }
3055
3056 void
3057 ev_unref (EV_P)
3058 {
3059 --activecnt;
3060 }
3061
3062 void
3063 ev_now_update (EV_P)
3064 {
3065 time_update (EV_A_ 1e100);
3066 }
3067
3068 void
3069 ev_suspend (EV_P)
3070 {
3071 ev_now_update (EV_A);
3072 }
3073
3074 void
3075 ev_resume (EV_P)
3076 {
3077 ev_tstamp mn_prev = mn_now;
3078
3079 ev_now_update (EV_A);
3080 timers_reschedule (EV_A_ mn_now - mn_prev);
3081 #if EV_PERIODIC_ENABLE
3082 /* TODO: really do this? */
3083 periodics_reschedule (EV_A);
3084 #endif
3085 }
3086
3087 /*****************************************************************************/
3088 /* singly-linked list management, used when the expected list length is short */
3089
3090 inline_size void
3091 wlist_add (WL *head, WL elem)
3092 {
3093 elem->next = *head;
3094 *head = elem;
3095 }
3096
3097 inline_size void
3098 wlist_del (WL *head, WL elem)
3099 {
3100 while (*head)
3101 {
3102 if (expect_true (*head == elem))
3103 {
3104 *head = elem->next;
3105 break;
3106 }
3107
3108 head = &(*head)->next;
3109 }
3110 }
3111
3112 /* internal, faster, version of ev_clear_pending */
3113 inline_speed void
3114 clear_pending (EV_P_ W w)
3115 {
3116 if (w->pending)
3117 {
3118 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3119 w->pending = 0;
3120 }
3121 }
3122
3123 int
3124 ev_clear_pending (EV_P_ void *w)
3125 {
3126 W w_ = (W)w;
3127 int pending = w_->pending;
3128
3129 if (expect_true (pending))
3130 {
3131 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3132 p->w = (W)&pending_w;
3133 w_->pending = 0;
3134 return p->events;
3135 }
3136 else
3137 return 0;
3138 }
3139
3140 inline_size void
3141 pri_adjust (EV_P_ W w)
3142 {
3143 int pri = ev_priority (w);
3144 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3145 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3146 ev_set_priority (w, pri);
3147 }
3148
3149 inline_speed void
3150 ev_start (EV_P_ W w, int active)
3151 {
3152 pri_adjust (EV_A_ w);
3153 w->active = active;
3154 ev_ref (EV_A);
3155 }
3156
3157 inline_size void
3158 ev_stop (EV_P_ W w)
3159 {
3160 ev_unref (EV_A);
3161 w->active = 0;
3162 }
3163
3164 /*****************************************************************************/
3165
3166 void noinline
3167 ev_io_start (EV_P_ ev_io *w)
3168 {
3169 int fd = w->fd;
3170
3171 if (expect_false (ev_is_active (w)))
3172 return;
3173
3174 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3175 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3176
3177 EV_FREQUENT_CHECK;
3178
3179 ev_start (EV_A_ (W)w, 1);
3180 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3181 wlist_add (&anfds[fd].head, (WL)w);
3182
3183 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3184 w->events &= ~EV__IOFDSET;
3185
3186 EV_FREQUENT_CHECK;
3187 }
3188
3189 void noinline
3190 ev_io_stop (EV_P_ ev_io *w)
3191 {
3192 clear_pending (EV_A_ (W)w);
3193 if (expect_false (!ev_is_active (w)))
3194 return;
3195
3196 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3197
3198 EV_FREQUENT_CHECK;
3199
3200 wlist_del (&anfds[w->fd].head, (WL)w);
3201 ev_stop (EV_A_ (W)w);
3202
3203 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3204
3205 EV_FREQUENT_CHECK;
3206 }
3207
3208 void noinline
3209 ev_timer_start (EV_P_ ev_timer *w)
3210 {
3211 if (expect_false (ev_is_active (w)))
3212 return;
3213
3214 ev_at (w) += mn_now;
3215
3216 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3217
3218 EV_FREQUENT_CHECK;
3219
3220 ++timercnt;
3221 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3222 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3223 ANHE_w (timers [ev_active (w)]) = (WT)w;
3224 ANHE_at_cache (timers [ev_active (w)]);
3225 upheap (timers, ev_active (w));
3226
3227 EV_FREQUENT_CHECK;
3228
3229 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3230 }
3231
3232 void noinline
3233 ev_timer_stop (EV_P_ ev_timer *w)
3234 {
3235 clear_pending (EV_A_ (W)w);
3236 if (expect_false (!ev_is_active (w)))
3237 return;
3238
3239 EV_FREQUENT_CHECK;
3240
3241 {
3242 int active = ev_active (w);
3243
3244 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3245
3246 --timercnt;
3247
3248 if (expect_true (active < timercnt + HEAP0))
3249 {
3250 timers [active] = timers [timercnt + HEAP0];
3251 adjustheap (timers, timercnt, active);
3252 }
3253 }
3254
3255 ev_at (w) -= mn_now;
3256
3257 ev_stop (EV_A_ (W)w);
3258
3259 EV_FREQUENT_CHECK;
3260 }
3261
3262 void noinline
3263 ev_timer_again (EV_P_ ev_timer *w)
3264 {
3265 EV_FREQUENT_CHECK;
3266
3267 if (ev_is_active (w))
3268 {
3269 if (w->repeat)
3270 {
3271 ev_at (w) = mn_now + w->repeat;
3272 ANHE_at_cache (timers [ev_active (w)]);
3273 adjustheap (timers, timercnt, ev_active (w));
3274 }
3275 else
3276 ev_timer_stop (EV_A_ w);
3277 }
3278 else if (w->repeat)
3279 {
3280 ev_at (w) = w->repeat;
3281 ev_timer_start (EV_A_ w);
3282 }
3283
3284 EV_FREQUENT_CHECK;
3285 }
3286
3287 ev_tstamp
3288 ev_timer_remaining (EV_P_ ev_timer *w)
3289 {
3290 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3291 }
3292
3293 #if EV_PERIODIC_ENABLE
3294 void noinline
3295 ev_periodic_start (EV_P_ ev_periodic *w)
3296 {
3297 if (expect_false (ev_is_active (w)))
3298 return;
3299
3300 if (w->reschedule_cb)
3301 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3302 else if (w->interval)
3303 {
3304 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3305 periodic_recalc (EV_A_ w);
3306 }
3307 else
3308 ev_at (w) = w->offset;
3309
3310 EV_FREQUENT_CHECK;
3311
3312 ++periodiccnt;
3313 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3314 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3315 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3316 ANHE_at_cache (periodics [ev_active (w)]);
3317 upheap (periodics, ev_active (w));
3318
3319 EV_FREQUENT_CHECK;
3320
3321 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3322 }
3323
3324 void noinline
3325 ev_periodic_stop (EV_P_ ev_periodic *w)
3326 {
3327 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w)))
3329 return;
3330
3331 EV_FREQUENT_CHECK;
3332
3333 {
3334 int active = ev_active (w);
3335
3336 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3337
3338 --periodiccnt;
3339
3340 if (expect_true (active < periodiccnt + HEAP0))
3341 {
3342 periodics [active] = periodics [periodiccnt + HEAP0];
3343 adjustheap (periodics, periodiccnt, active);
3344 }
3345 }
3346
3347 ev_stop (EV_A_ (W)w);
3348
3349 EV_FREQUENT_CHECK;
3350 }
3351
3352 void noinline
3353 ev_periodic_again (EV_P_ ev_periodic *w)
3354 {
3355 /* TODO: use adjustheap and recalculation */
3356 ev_periodic_stop (EV_A_ w);
3357 ev_periodic_start (EV_A_ w);
3358 }
3359 #endif
3360
3361 #ifndef SA_RESTART
3362 # define SA_RESTART 0
3363 #endif
3364
3365 #if EV_SIGNAL_ENABLE
3366
3367 void noinline
3368 ev_signal_start (EV_P_ ev_signal *w)
3369 {
3370 if (expect_false (ev_is_active (w)))
3371 return;
3372
3373 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3374
3375 #if EV_MULTIPLICITY
3376 assert (("libev: a signal must not be attached to two different loops",
3377 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3378
3379 signals [w->signum - 1].loop = EV_A;
3380 #endif
3381
3382 EV_FREQUENT_CHECK;
3383
3384 #if EV_USE_SIGNALFD
3385 if (sigfd == -2)
3386 {
3387 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3388 if (sigfd < 0 && errno == EINVAL)
3389 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3390
3391 if (sigfd >= 0)
3392 {
3393 fd_intern (sigfd); /* doing it twice will not hurt */
3394
3395 sigemptyset (&sigfd_set);
3396
3397 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3398 ev_set_priority (&sigfd_w, EV_MAXPRI);
3399 ev_io_start (EV_A_ &sigfd_w);
3400 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3401 }
3402 }
3403
3404 if (sigfd >= 0)
3405 {
3406 /* TODO: check .head */
3407 sigaddset (&sigfd_set, w->signum);
3408 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3409
3410 signalfd (sigfd, &sigfd_set, 0);
3411 }
3412 #endif
3413
3414 ev_start (EV_A_ (W)w, 1);
3415 wlist_add (&signals [w->signum - 1].head, (WL)w);
3416
3417 if (!((WL)w)->next)
3418 # if EV_USE_SIGNALFD
3419 if (sigfd < 0) /*TODO*/
3420 # endif
3421 {
3422 # ifdef _WIN32
3423 evpipe_init (EV_A);
3424
3425 signal (w->signum, ev_sighandler);
3426 # else
3427 struct sigaction sa;
3428
3429 evpipe_init (EV_A);
3430
3431 sa.sa_handler = ev_sighandler;
3432 sigfillset (&sa.sa_mask);
3433 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3434 sigaction (w->signum, &sa, 0);
3435
3436 if (origflags & EVFLAG_NOSIGMASK)
3437 {
3438 sigemptyset (&sa.sa_mask);
3439 sigaddset (&sa.sa_mask, w->signum);
3440 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3441 }
3442 #endif
3443 }
3444
3445 EV_FREQUENT_CHECK;
3446 }
3447
3448 void noinline
3449 ev_signal_stop (EV_P_ ev_signal *w)
3450 {
3451 clear_pending (EV_A_ (W)w);
3452 if (expect_false (!ev_is_active (w)))
3453 return;
3454
3455 EV_FREQUENT_CHECK;
3456
3457 wlist_del (&signals [w->signum - 1].head, (WL)w);
3458 ev_stop (EV_A_ (W)w);
3459
3460 if (!signals [w->signum - 1].head)
3461 {
3462 #if EV_MULTIPLICITY
3463 signals [w->signum - 1].loop = 0; /* unattach from signal */
3464 #endif
3465 #if EV_USE_SIGNALFD
3466 if (sigfd >= 0)
3467 {
3468 sigset_t ss;
3469
3470 sigemptyset (&ss);
3471 sigaddset (&ss, w->signum);
3472 sigdelset (&sigfd_set, w->signum);
3473
3474 signalfd (sigfd, &sigfd_set, 0);
3475 sigprocmask (SIG_UNBLOCK, &ss, 0);
3476 }
3477 else
3478 #endif
3479 signal (w->signum, SIG_DFL);
3480 }
3481
3482 EV_FREQUENT_CHECK;
3483 }
3484
3485 #endif
3486
3487 #if EV_CHILD_ENABLE
3488
3489 void
3490 ev_child_start (EV_P_ ev_child *w)
3491 {
3492 #if EV_MULTIPLICITY
3493 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3494 #endif
3495 if (expect_false (ev_is_active (w)))
3496 return;
3497
3498 EV_FREQUENT_CHECK;
3499
3500 ev_start (EV_A_ (W)w, 1);
3501 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3502
3503 EV_FREQUENT_CHECK;
3504 }
3505
3506 void
3507 ev_child_stop (EV_P_ ev_child *w)
3508 {
3509 clear_pending (EV_A_ (W)w);
3510 if (expect_false (!ev_is_active (w)))
3511 return;
3512
3513 EV_FREQUENT_CHECK;
3514
3515 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3516 ev_stop (EV_A_ (W)w);
3517
3518 EV_FREQUENT_CHECK;
3519 }
3520
3521 #endif
3522
3523 #if EV_STAT_ENABLE
3524
3525 # ifdef _WIN32
3526 # undef lstat
3527 # define lstat(a,b) _stati64 (a,b)
3528 # endif
3529
3530 #define DEF_STAT_INTERVAL 5.0074891
3531 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3532 #define MIN_STAT_INTERVAL 0.1074891
3533
3534 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3535
3536 #if EV_USE_INOTIFY
3537
3538 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3539 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3540
3541 static void noinline
3542 infy_add (EV_P_ ev_stat *w)
3543 {
3544 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);
3545
3546 if (w->wd >= 0)
3547 {
3548 struct statfs sfs;
3549
3550 /* now local changes will be tracked by inotify, but remote changes won't */
3551 /* unless the filesystem is known to be local, we therefore still poll */
3552 /* also do poll on <2.6.25, but with normal frequency */
3553
3554 if (!fs_2625)
3555 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3556 else if (!statfs (w->path, &sfs)
3557 && (sfs.f_type == 0x1373 /* devfs */
3558 || sfs.f_type == 0xEF53 /* ext2/3 */
3559 || sfs.f_type == 0x3153464a /* jfs */
3560 || sfs.f_type == 0x52654973 /* reiser3 */
3561 || sfs.f_type == 0x01021994 /* tempfs */
3562 || sfs.f_type == 0x58465342 /* xfs */))
3563 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3564 else
3565 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3566 }
3567 else
3568 {
3569 /* can't use inotify, continue to stat */
3570 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3571
3572 /* if path is not there, monitor some parent directory for speedup hints */
3573 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3574 /* but an efficiency issue only */
3575 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3576 {
3577 char path [4096];
3578 strcpy (path, w->path);
3579
3580 do
3581 {
3582 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3583 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3584
3585 char *pend = strrchr (path, '/');
3586
3587 if (!pend || pend == path)
3588 break;
3589
3590 *pend = 0;
3591 w->wd = inotify_add_watch (fs_fd, path, mask);
3592 }
3593 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3594 }
3595 }
3596
3597 if (w->wd >= 0)
3598 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3599
3600 /* now re-arm timer, if required */
3601 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3602 ev_timer_again (EV_A_ &w->timer);
3603 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3604 }
3605
3606 static void noinline
3607 infy_del (EV_P_ ev_stat *w)
3608 {
3609 int slot;
3610 int wd = w->wd;
3611
3612 if (wd < 0)
3613 return;
3614
3615 w->wd = -2;
3616 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3617 wlist_del (&fs_hash [slot].head, (WL)w);
3618
3619 /* remove this watcher, if others are watching it, they will rearm */
3620 inotify_rm_watch (fs_fd, wd);
3621 }
3622
3623 static void noinline
3624 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3625 {
3626 if (slot < 0)
3627 /* overflow, need to check for all hash slots */
3628 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3629 infy_wd (EV_A_ slot, wd, ev);
3630 else
3631 {
3632 WL w_;
3633
3634 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3635 {
3636 ev_stat *w = (ev_stat *)w_;
3637 w_ = w_->next; /* lets us remove this watcher and all before it */
3638
3639 if (w->wd == wd || wd == -1)
3640 {
3641 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3642 {
3643 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3644 w->wd = -1;
3645 infy_add (EV_A_ w); /* re-add, no matter what */
3646 }
3647
3648 stat_timer_cb (EV_A_ &w->timer, 0);
3649 }
3650 }
3651 }
3652 }
3653
3654 static void
3655 infy_cb (EV_P_ ev_io *w, int revents)
3656 {
3657 char buf [EV_INOTIFY_BUFSIZE];
3658 int ofs;
3659 int len = read (fs_fd, buf, sizeof (buf));
3660
3661 for (ofs = 0; ofs < len; )
3662 {
3663 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3664 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3665 ofs += sizeof (struct inotify_event) + ev->len;
3666 }
3667 }
3668
3669 inline_size void ecb_cold
3670 ev_check_2625 (EV_P)
3671 {
3672 /* kernels < 2.6.25 are borked
3673 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3674 */
3675 if (ev_linux_version () < 0x020619)
3676 return;
3677
3678 fs_2625 = 1;
3679 }
3680
3681 inline_size int
3682 infy_newfd (void)
3683 {
3684 #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3685 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3686 if (fd >= 0)
3687 return fd;
3688 #endif
3689 return inotify_init ();
3690 }
3691
3692 inline_size void
3693 infy_init (EV_P)
3694 {
3695 if (fs_fd != -2)
3696 return;
3697
3698 fs_fd = -1;
3699
3700 ev_check_2625 (EV_A);
3701
3702 fs_fd = infy_newfd ();
3703
3704 if (fs_fd >= 0)
3705 {
3706 fd_intern (fs_fd);
3707 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3708 ev_set_priority (&fs_w, EV_MAXPRI);
3709 ev_io_start (EV_A_ &fs_w);
3710 ev_unref (EV_A);
3711 }
3712 }
3713
3714 inline_size void
3715 infy_fork (EV_P)
3716 {
3717 int slot;
3718
3719 if (fs_fd < 0)
3720 return;
3721
3722 ev_ref (EV_A);
3723 ev_io_stop (EV_A_ &fs_w);
3724 close (fs_fd);
3725 fs_fd = infy_newfd ();
3726
3727 if (fs_fd >= 0)
3728 {
3729 fd_intern (fs_fd);
3730 ev_io_set (&fs_w, fs_fd, EV_READ);
3731 ev_io_start (EV_A_ &fs_w);
3732 ev_unref (EV_A);
3733 }
3734
3735 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3736 {
3737 WL w_ = fs_hash [slot].head;
3738 fs_hash [slot].head = 0;
3739
3740 while (w_)
3741 {
3742 ev_stat *w = (ev_stat *)w_;
3743 w_ = w_->next; /* lets us add this watcher */
3744
3745 w->wd = -1;
3746
3747 if (fs_fd >= 0)
3748 infy_add (EV_A_ w); /* re-add, no matter what */
3749 else
3750 {
3751 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3752 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3753 ev_timer_again (EV_A_ &w->timer);
3754 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3755 }
3756 }
3757 }
3758 }
3759
3760 #endif
3761
3762 #ifdef _WIN32
3763 # define EV_LSTAT(p,b) _stati64 (p, b)
3764 #else
3765 # define EV_LSTAT(p,b) lstat (p, b)
3766 #endif
3767
3768 void
3769 ev_stat_stat (EV_P_ ev_stat *w)
3770 {
3771 if (lstat (w->path, &w->attr) < 0)
3772 w->attr.st_nlink = 0;
3773 else if (!w->attr.st_nlink)
3774 w->attr.st_nlink = 1;
3775 }
3776
3777 static void noinline
3778 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3779 {
3780 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3781
3782 ev_statdata prev = w->attr;
3783 ev_stat_stat (EV_A_ w);
3784
3785 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3786 if (
3787 prev.st_dev != w->attr.st_dev
3788 || prev.st_ino != w->attr.st_ino
3789 || prev.st_mode != w->attr.st_mode
3790 || prev.st_nlink != w->attr.st_nlink
3791 || prev.st_uid != w->attr.st_uid
3792 || prev.st_gid != w->attr.st_gid
3793 || prev.st_rdev != w->attr.st_rdev
3794 || prev.st_size != w->attr.st_size
3795 || prev.st_atime != w->attr.st_atime
3796 || prev.st_mtime != w->attr.st_mtime
3797 || prev.st_ctime != w->attr.st_ctime
3798 ) {
3799 /* we only update w->prev on actual differences */
3800 /* in case we test more often than invoke the callback, */
3801 /* to ensure that prev is always different to attr */
3802 w->prev = prev;
3803
3804 #if EV_USE_INOTIFY
3805 if (fs_fd >= 0)
3806 {
3807 infy_del (EV_A_ w);
3808 infy_add (EV_A_ w);
3809 ev_stat_stat (EV_A_ w); /* avoid race... */
3810 }
3811 #endif
3812
3813 ev_feed_event (EV_A_ w, EV_STAT);
3814 }
3815 }
3816
3817 void
3818 ev_stat_start (EV_P_ ev_stat *w)
3819 {
3820 if (expect_false (ev_is_active (w)))
3821 return;
3822
3823 ev_stat_stat (EV_A_ w);
3824
3825 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3826 w->interval = MIN_STAT_INTERVAL;
3827
3828 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3829 ev_set_priority (&w->timer, ev_priority (w));
3830
3831 #if EV_USE_INOTIFY
3832 infy_init (EV_A);
3833
3834 if (fs_fd >= 0)
3835 infy_add (EV_A_ w);
3836 else
3837 #endif
3838 {
3839 ev_timer_again (EV_A_ &w->timer);
3840 ev_unref (EV_A);
3841 }
3842
3843 ev_start (EV_A_ (W)w, 1);
3844
3845 EV_FREQUENT_CHECK;
3846 }
3847
3848 void
3849 ev_stat_stop (EV_P_ ev_stat *w)
3850 {
3851 clear_pending (EV_A_ (W)w);
3852 if (expect_false (!ev_is_active (w)))
3853 return;
3854
3855 EV_FREQUENT_CHECK;
3856
3857 #if EV_USE_INOTIFY
3858 infy_del (EV_A_ w);
3859 #endif
3860
3861 if (ev_is_active (&w->timer))
3862 {
3863 ev_ref (EV_A);
3864 ev_timer_stop (EV_A_ &w->timer);
3865 }
3866
3867 ev_stop (EV_A_ (W)w);
3868
3869 EV_FREQUENT_CHECK;
3870 }
3871 #endif
3872
3873 #if EV_IDLE_ENABLE
3874 void
3875 ev_idle_start (EV_P_ ev_idle *w)
3876 {
3877 if (expect_false (ev_is_active (w)))
3878 return;
3879
3880 pri_adjust (EV_A_ (W)w);
3881
3882 EV_FREQUENT_CHECK;
3883
3884 {
3885 int active = ++idlecnt [ABSPRI (w)];
3886
3887 ++idleall;
3888 ev_start (EV_A_ (W)w, active);
3889
3890 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3891 idles [ABSPRI (w)][active - 1] = w;
3892 }
3893
3894 EV_FREQUENT_CHECK;
3895 }
3896
3897 void
3898 ev_idle_stop (EV_P_ ev_idle *w)
3899 {
3900 clear_pending (EV_A_ (W)w);
3901 if (expect_false (!ev_is_active (w)))
3902 return;
3903
3904 EV_FREQUENT_CHECK;
3905
3906 {
3907 int active = ev_active (w);
3908
3909 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3910 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3911
3912 ev_stop (EV_A_ (W)w);
3913 --idleall;
3914 }
3915
3916 EV_FREQUENT_CHECK;
3917 }
3918 #endif
3919
3920 #if EV_PREPARE_ENABLE
3921 void
3922 ev_prepare_start (EV_P_ ev_prepare *w)
3923 {
3924 if (expect_false (ev_is_active (w)))
3925 return;
3926
3927 EV_FREQUENT_CHECK;
3928
3929 ev_start (EV_A_ (W)w, ++preparecnt);
3930 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3931 prepares [preparecnt - 1] = w;
3932
3933 EV_FREQUENT_CHECK;
3934 }
3935
3936 void
3937 ev_prepare_stop (EV_P_ ev_prepare *w)
3938 {
3939 clear_pending (EV_A_ (W)w);
3940 if (expect_false (!ev_is_active (w)))
3941 return;
3942
3943 EV_FREQUENT_CHECK;
3944
3945 {
3946 int active = ev_active (w);
3947
3948 prepares [active - 1] = prepares [--preparecnt];
3949 ev_active (prepares [active - 1]) = active;
3950 }
3951
3952 ev_stop (EV_A_ (W)w);
3953
3954 EV_FREQUENT_CHECK;
3955 }
3956 #endif
3957
3958 #if EV_CHECK_ENABLE
3959 void
3960 ev_check_start (EV_P_ ev_check *w)
3961 {
3962 if (expect_false (ev_is_active (w)))
3963 return;
3964
3965 EV_FREQUENT_CHECK;
3966
3967 ev_start (EV_A_ (W)w, ++checkcnt);
3968 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3969 checks [checkcnt - 1] = w;
3970
3971 EV_FREQUENT_CHECK;
3972 }
3973
3974 void
3975 ev_check_stop (EV_P_ ev_check *w)
3976 {
3977 clear_pending (EV_A_ (W)w);
3978 if (expect_false (!ev_is_active (w)))
3979 return;
3980
3981 EV_FREQUENT_CHECK;
3982
3983 {
3984 int active = ev_active (w);
3985
3986 checks [active - 1] = checks [--checkcnt];
3987 ev_active (checks [active - 1]) = active;
3988 }
3989
3990 ev_stop (EV_A_ (W)w);
3991
3992 EV_FREQUENT_CHECK;
3993 }
3994 #endif
3995
3996 #if EV_EMBED_ENABLE
3997 void noinline
3998 ev_embed_sweep (EV_P_ ev_embed *w)
3999 {
4000 ev_run (w->other, EVRUN_NOWAIT);
4001 }
4002
4003 static void
4004 embed_io_cb (EV_P_ ev_io *io, int revents)
4005 {
4006 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4007
4008 if (ev_cb (w))
4009 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4010 else
4011 ev_run (w->other, EVRUN_NOWAIT);
4012 }
4013
4014 static void
4015 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4016 {
4017 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4018
4019 {
4020 EV_P = w->other;
4021
4022 while (fdchangecnt)
4023 {
4024 fd_reify (EV_A);
4025 ev_run (EV_A_ EVRUN_NOWAIT);
4026 }
4027 }
4028 }
4029
4030 static void
4031 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4032 {
4033 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4034
4035 ev_embed_stop (EV_A_ w);
4036
4037 {
4038 EV_P = w->other;
4039
4040 ev_loop_fork (EV_A);
4041 ev_run (EV_A_ EVRUN_NOWAIT);
4042 }
4043
4044 ev_embed_start (EV_A_ w);
4045 }
4046
4047 #if 0
4048 static void
4049 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4050 {
4051 ev_idle_stop (EV_A_ idle);
4052 }
4053 #endif
4054
4055 void
4056 ev_embed_start (EV_P_ ev_embed *w)
4057 {
4058 if (expect_false (ev_is_active (w)))
4059 return;
4060
4061 {
4062 EV_P = w->other;
4063 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4064 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4065 }
4066
4067 EV_FREQUENT_CHECK;
4068
4069 ev_set_priority (&w->io, ev_priority (w));
4070 ev_io_start (EV_A_ &w->io);
4071
4072 ev_prepare_init (&w->prepare, embed_prepare_cb);
4073 ev_set_priority (&w->prepare, EV_MINPRI);
4074 ev_prepare_start (EV_A_ &w->prepare);
4075
4076 ev_fork_init (&w->fork, embed_fork_cb);
4077 ev_fork_start (EV_A_ &w->fork);
4078
4079 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4080
4081 ev_start (EV_A_ (W)w, 1);
4082
4083 EV_FREQUENT_CHECK;
4084 }
4085
4086 void
4087 ev_embed_stop (EV_P_ ev_embed *w)
4088 {
4089 clear_pending (EV_A_ (W)w);
4090 if (expect_false (!ev_is_active (w)))
4091 return;
4092
4093 EV_FREQUENT_CHECK;
4094
4095 ev_io_stop (EV_A_ &w->io);
4096 ev_prepare_stop (EV_A_ &w->prepare);
4097 ev_fork_stop (EV_A_ &w->fork);
4098
4099 ev_stop (EV_A_ (W)w);
4100
4101 EV_FREQUENT_CHECK;
4102 }
4103 #endif
4104
4105 #if EV_FORK_ENABLE
4106 void
4107 ev_fork_start (EV_P_ ev_fork *w)
4108 {
4109 if (expect_false (ev_is_active (w)))
4110 return;
4111
4112 EV_FREQUENT_CHECK;
4113
4114 ev_start (EV_A_ (W)w, ++forkcnt);
4115 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4116 forks [forkcnt - 1] = w;
4117
4118 EV_FREQUENT_CHECK;
4119 }
4120
4121 void
4122 ev_fork_stop (EV_P_ ev_fork *w)
4123 {
4124 clear_pending (EV_A_ (W)w);
4125 if (expect_false (!ev_is_active (w)))
4126 return;
4127
4128 EV_FREQUENT_CHECK;
4129
4130 {
4131 int active = ev_active (w);
4132
4133 forks [active - 1] = forks [--forkcnt];
4134 ev_active (forks [active - 1]) = active;
4135 }
4136
4137 ev_stop (EV_A_ (W)w);
4138
4139 EV_FREQUENT_CHECK;
4140 }
4141 #endif
4142
4143 #if EV_CLEANUP_ENABLE
4144 void
4145 ev_cleanup_start (EV_P_ ev_cleanup *w)
4146 {
4147 if (expect_false (ev_is_active (w)))
4148 return;
4149
4150 EV_FREQUENT_CHECK;
4151
4152 ev_start (EV_A_ (W)w, ++cleanupcnt);
4153 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4154 cleanups [cleanupcnt - 1] = w;
4155
4156 /* cleanup watchers should never keep a refcount on the loop */
4157 ev_unref (EV_A);
4158 EV_FREQUENT_CHECK;
4159 }
4160
4161 void
4162 ev_cleanup_stop (EV_P_ ev_cleanup *w)
4163 {
4164 clear_pending (EV_A_ (W)w);
4165 if (expect_false (!ev_is_active (w)))
4166 return;
4167
4168 EV_FREQUENT_CHECK;
4169 ev_ref (EV_A);
4170
4171 {
4172 int active = ev_active (w);
4173
4174 cleanups [active - 1] = cleanups [--cleanupcnt];
4175 ev_active (cleanups [active - 1]) = active;
4176 }
4177
4178 ev_stop (EV_A_ (W)w);
4179
4180 EV_FREQUENT_CHECK;
4181 }
4182 #endif
4183
4184 #if EV_ASYNC_ENABLE
4185 void
4186 ev_async_start (EV_P_ ev_async *w)
4187 {
4188 if (expect_false (ev_is_active (w)))
4189 return;
4190
4191 w->sent = 0;
4192
4193 evpipe_init (EV_A);
4194
4195 EV_FREQUENT_CHECK;
4196
4197 ev_start (EV_A_ (W)w, ++asynccnt);
4198 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4199 asyncs [asynccnt - 1] = w;
4200
4201 EV_FREQUENT_CHECK;
4202 }
4203
4204 void
4205 ev_async_stop (EV_P_ ev_async *w)
4206 {
4207 clear_pending (EV_A_ (W)w);
4208 if (expect_false (!ev_is_active (w)))
4209 return;
4210
4211 EV_FREQUENT_CHECK;
4212
4213 {
4214 int active = ev_active (w);
4215
4216 asyncs [active - 1] = asyncs [--asynccnt];
4217 ev_active (asyncs [active - 1]) = active;
4218 }
4219
4220 ev_stop (EV_A_ (W)w);
4221
4222 EV_FREQUENT_CHECK;
4223 }
4224
4225 void
4226 ev_async_send (EV_P_ ev_async *w)
4227 {
4228 w->sent = 1;
4229 evpipe_write (EV_A_ &async_pending);
4230 }
4231 #endif
4232
4233 /*****************************************************************************/
4234
4235 struct ev_once
4236 {
4237 ev_io io;
4238 ev_timer to;
4239 void (*cb)(int revents, void *arg);
4240 void *arg;
4241 };
4242
4243 static void
4244 once_cb (EV_P_ struct ev_once *once, int revents)
4245 {
4246 void (*cb)(int revents, void *arg) = once->cb;
4247 void *arg = once->arg;
4248
4249 ev_io_stop (EV_A_ &once->io);
4250 ev_timer_stop (EV_A_ &once->to);
4251 ev_free (once);
4252
4253 cb (revents, arg);
4254 }
4255
4256 static void
4257 once_cb_io (EV_P_ ev_io *w, int revents)
4258 {
4259 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4260
4261 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4262 }
4263
4264 static void
4265 once_cb_to (EV_P_ ev_timer *w, int revents)
4266 {
4267 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4268
4269 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4270 }
4271
4272 void
4273 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
4274 {
4275 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4276
4277 if (expect_false (!once))
4278 {
4279 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4280 return;
4281 }
4282
4283 once->cb = cb;
4284 once->arg = arg;
4285
4286 ev_init (&once->io, once_cb_io);
4287 if (fd >= 0)
4288 {
4289 ev_io_set (&once->io, fd, events);
4290 ev_io_start (EV_A_ &once->io);
4291 }
4292
4293 ev_init (&once->to, once_cb_to);
4294 if (timeout >= 0.)
4295 {
4296 ev_timer_set (&once->to, timeout, 0.);
4297 ev_timer_start (EV_A_ &once->to);
4298 }
4299 }
4300
4301 /*****************************************************************************/
4302
4303 #if EV_WALK_ENABLE
4304 void ecb_cold
4305 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4306 {
4307 int i, j;
4308 ev_watcher_list *wl, *wn;
4309
4310 if (types & (EV_IO | EV_EMBED))
4311 for (i = 0; i < anfdmax; ++i)
4312 for (wl = anfds [i].head; wl; )
4313 {
4314 wn = wl->next;
4315
4316 #if EV_EMBED_ENABLE
4317 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4318 {
4319 if (types & EV_EMBED)
4320 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4321 }
4322 else
4323 #endif
4324 #if EV_USE_INOTIFY
4325 if (ev_cb ((ev_io *)wl) == infy_cb)
4326 ;
4327 else
4328 #endif
4329 if ((ev_io *)wl != &pipe_w)
4330 if (types & EV_IO)
4331 cb (EV_A_ EV_IO, wl);
4332
4333 wl = wn;
4334 }
4335
4336 if (types & (EV_TIMER | EV_STAT))
4337 for (i = timercnt + HEAP0; i-- > HEAP0; )
4338 #if EV_STAT_ENABLE
4339 /*TODO: timer is not always active*/
4340 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4341 {
4342 if (types & EV_STAT)
4343 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4344 }
4345 else
4346 #endif
4347 if (types & EV_TIMER)
4348 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4349
4350 #if EV_PERIODIC_ENABLE
4351 if (types & EV_PERIODIC)
4352 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4353 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4354 #endif
4355
4356 #if EV_IDLE_ENABLE
4357 if (types & EV_IDLE)
4358 for (j = NUMPRI; j--; )
4359 for (i = idlecnt [j]; i--; )
4360 cb (EV_A_ EV_IDLE, idles [j][i]);
4361 #endif
4362
4363 #if EV_FORK_ENABLE
4364 if (types & EV_FORK)
4365 for (i = forkcnt; i--; )
4366 if (ev_cb (forks [i]) != embed_fork_cb)
4367 cb (EV_A_ EV_FORK, forks [i]);
4368 #endif
4369
4370 #if EV_ASYNC_ENABLE
4371 if (types & EV_ASYNC)
4372 for (i = asynccnt; i--; )
4373 cb (EV_A_ EV_ASYNC, asyncs [i]);
4374 #endif
4375
4376 #if EV_PREPARE_ENABLE
4377 if (types & EV_PREPARE)
4378 for (i = preparecnt; i--; )
4379 # if EV_EMBED_ENABLE
4380 if (ev_cb (prepares [i]) != embed_prepare_cb)
4381 # endif
4382 cb (EV_A_ EV_PREPARE, prepares [i]);
4383 #endif
4384
4385 #if EV_CHECK_ENABLE
4386 if (types & EV_CHECK)
4387 for (i = checkcnt; i--; )
4388 cb (EV_A_ EV_CHECK, checks [i]);
4389 #endif
4390
4391 #if EV_SIGNAL_ENABLE
4392 if (types & EV_SIGNAL)
4393 for (i = 0; i < EV_NSIG - 1; ++i)
4394 for (wl = signals [i].head; wl; )
4395 {
4396 wn = wl->next;
4397 cb (EV_A_ EV_SIGNAL, wl);
4398 wl = wn;
4399 }
4400 #endif
4401
4402 #if EV_CHILD_ENABLE
4403 if (types & EV_CHILD)
4404 for (i = (EV_PID_HASHSIZE); i--; )
4405 for (wl = childs [i]; wl; )
4406 {
4407 wn = wl->next;
4408 cb (EV_A_ EV_CHILD, wl);
4409 wl = wn;
4410 }
4411 #endif
4412 /* EV_STAT 0x00001000 /* stat data changed */
4413 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4414 }
4415 #endif
4416
4417 #if EV_MULTIPLICITY
4418 #include "ev_wrap.h"
4419 #endif
4420
4421 EV_CPP(})
4422