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Revision: 1.501
Committed: Mon Jul 1 21:47:42 2019 UTC (5 years ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.500: +103 -1 lines
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# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007-2019 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_LINUX_AIO_ABI_H
121 # ifndef EV_USE_LINUXAIO
122 # define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123 # endif
124 # else
125 # undef EV_USE_LINUXAIO
126 # define EV_USE_LINUXAIO 0
127 # endif
128
129 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H
130 # ifndef EV_USE_KQUEUE
131 # define EV_USE_KQUEUE EV_FEATURE_BACKENDS
132 # endif
133 # else
134 # undef EV_USE_KQUEUE
135 # define EV_USE_KQUEUE 0
136 # endif
137
138 # if HAVE_PORT_H && HAVE_PORT_CREATE
139 # ifndef EV_USE_PORT
140 # define EV_USE_PORT EV_FEATURE_BACKENDS
141 # endif
142 # else
143 # undef EV_USE_PORT
144 # define EV_USE_PORT 0
145 # endif
146
147 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
148 # ifndef EV_USE_INOTIFY
149 # define EV_USE_INOTIFY EV_FEATURE_OS
150 # endif
151 # else
152 # undef EV_USE_INOTIFY
153 # define EV_USE_INOTIFY 0
154 # endif
155
156 # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
157 # ifndef EV_USE_SIGNALFD
158 # define EV_USE_SIGNALFD EV_FEATURE_OS
159 # endif
160 # else
161 # undef EV_USE_SIGNALFD
162 # define EV_USE_SIGNALFD 0
163 # endif
164
165 # if HAVE_EVENTFD
166 # ifndef EV_USE_EVENTFD
167 # define EV_USE_EVENTFD EV_FEATURE_OS
168 # endif
169 # else
170 # undef EV_USE_EVENTFD
171 # define EV_USE_EVENTFD 0
172 # endif
173
174 #endif
175
176 /* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184 #define _DARWIN_UNLIMITED_SELECT 1
185
186 #include <stdlib.h>
187 #include <string.h>
188 #include <fcntl.h>
189 #include <stddef.h>
190
191 #include <stdio.h>
192
193 #include <assert.h>
194 #include <errno.h>
195 #include <sys/types.h>
196 #include <time.h>
197 #include <limits.h>
198
199 #include <signal.h>
200
201 #ifdef EV_H
202 # include EV_H
203 #else
204 # include "ev.h"
205 #endif
206
207 #if EV_NO_THREADS
208 # undef EV_NO_SMP
209 # define EV_NO_SMP 1
210 # undef ECB_NO_THREADS
211 # define ECB_NO_THREADS 1
212 #endif
213 #if EV_NO_SMP
214 # undef EV_NO_SMP
215 # define ECB_NO_SMP 1
216 #endif
217
218 #ifndef _WIN32
219 # include <sys/time.h>
220 # include <sys/wait.h>
221 # include <unistd.h>
222 #else
223 # include <io.h>
224 # define WIN32_LEAN_AND_MEAN
225 # include <winsock2.h>
226 # include <windows.h>
227 # ifndef EV_SELECT_IS_WINSOCKET
228 # define EV_SELECT_IS_WINSOCKET 1
229 # endif
230 # undef EV_AVOID_STDIO
231 #endif
232
233 /* this block tries to deduce configuration from header-defined symbols and defaults */
234
235 /* try to deduce the maximum number of signals on this platform */
236 #if defined EV_NSIG
237 /* use what's provided */
238 #elif defined NSIG
239 # define EV_NSIG (NSIG)
240 #elif defined _NSIG
241 # define EV_NSIG (_NSIG)
242 #elif defined SIGMAX
243 # define EV_NSIG (SIGMAX+1)
244 #elif defined SIG_MAX
245 # define EV_NSIG (SIG_MAX+1)
246 #elif defined _SIG_MAX
247 # define EV_NSIG (_SIG_MAX+1)
248 #elif defined MAXSIG
249 # define EV_NSIG (MAXSIG+1)
250 #elif defined MAX_SIG
251 # define EV_NSIG (MAX_SIG+1)
252 #elif defined SIGARRAYSIZE
253 # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
254 #elif defined _sys_nsig
255 # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
256 #else
257 # define EV_NSIG (8 * sizeof (sigset_t) + 1)
258 #endif
259
260 #ifndef EV_USE_FLOOR
261 # define EV_USE_FLOOR 0
262 #endif
263
264 #ifndef EV_USE_CLOCK_SYSCALL
265 # if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
266 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
267 # else
268 # define EV_USE_CLOCK_SYSCALL 0
269 # endif
270 #endif
271
272 #if !(_POSIX_TIMERS > 0)
273 # ifndef EV_USE_MONOTONIC
274 # define EV_USE_MONOTONIC 0
275 # endif
276 # ifndef EV_USE_REALTIME
277 # define EV_USE_REALTIME 0
278 # endif
279 #endif
280
281 #ifndef EV_USE_MONOTONIC
282 # if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
283 # define EV_USE_MONOTONIC EV_FEATURE_OS
284 # else
285 # define EV_USE_MONOTONIC 0
286 # endif
287 #endif
288
289 #ifndef EV_USE_REALTIME
290 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
291 #endif
292
293 #ifndef EV_USE_NANOSLEEP
294 # if _POSIX_C_SOURCE >= 199309L
295 # define EV_USE_NANOSLEEP EV_FEATURE_OS
296 # else
297 # define EV_USE_NANOSLEEP 0
298 # endif
299 #endif
300
301 #ifndef EV_USE_SELECT
302 # define EV_USE_SELECT EV_FEATURE_BACKENDS
303 #endif
304
305 #ifndef EV_USE_POLL
306 # ifdef _WIN32
307 # define EV_USE_POLL 0
308 # else
309 # define EV_USE_POLL EV_FEATURE_BACKENDS
310 # endif
311 #endif
312
313 #ifndef EV_USE_EPOLL
314 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
315 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
316 # else
317 # define EV_USE_EPOLL 0
318 # endif
319 #endif
320
321 #ifndef EV_USE_KQUEUE
322 # define EV_USE_KQUEUE 0
323 #endif
324
325 #ifndef EV_USE_PORT
326 # define EV_USE_PORT 0
327 #endif
328
329 #ifndef EV_USE_LINUXAIO
330 # if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331 # define EV_USE_LINUXAIO 1
332 # else
333 # define EV_USE_LINUXAIO 0
334 # endif
335 #endif
336
337 #ifndef EV_USE_IOURING
338 # if __linux
339 # define EV_USE_IOURING 0
340 # else
341 # define EV_USE_IOURING 0
342 # endif
343 #endif
344
345 #ifndef EV_USE_INOTIFY
346 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
347 # define EV_USE_INOTIFY EV_FEATURE_OS
348 # else
349 # define EV_USE_INOTIFY 0
350 # endif
351 #endif
352
353 #ifndef EV_PID_HASHSIZE
354 # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
355 #endif
356
357 #ifndef EV_INOTIFY_HASHSIZE
358 # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
359 #endif
360
361 #ifndef EV_USE_EVENTFD
362 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
363 # define EV_USE_EVENTFD EV_FEATURE_OS
364 # else
365 # define EV_USE_EVENTFD 0
366 # endif
367 #endif
368
369 #ifndef EV_USE_SIGNALFD
370 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
371 # define EV_USE_SIGNALFD EV_FEATURE_OS
372 # else
373 # define EV_USE_SIGNALFD 0
374 # endif
375 #endif
376
377 #if 0 /* debugging */
378 # define EV_VERIFY 3
379 # define EV_USE_4HEAP 1
380 # define EV_HEAP_CACHE_AT 1
381 #endif
382
383 #ifndef EV_VERIFY
384 # define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
385 #endif
386
387 #ifndef EV_USE_4HEAP
388 # define EV_USE_4HEAP EV_FEATURE_DATA
389 #endif
390
391 #ifndef EV_HEAP_CACHE_AT
392 # define EV_HEAP_CACHE_AT EV_FEATURE_DATA
393 #endif
394
395 #ifdef __ANDROID__
396 /* supposedly, android doesn't typedef fd_mask */
397 # undef EV_USE_SELECT
398 # define EV_USE_SELECT 0
399 /* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
400 # undef EV_USE_CLOCK_SYSCALL
401 # define EV_USE_CLOCK_SYSCALL 0
402 #endif
403
404 /* aix's poll.h seems to cause lots of trouble */
405 #ifdef _AIX
406 /* AIX has a completely broken poll.h header */
407 # undef EV_USE_POLL
408 # define EV_USE_POLL 0
409 #endif
410
411 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
412 /* which makes programs even slower. might work on other unices, too. */
413 #if EV_USE_CLOCK_SYSCALL
414 # include <sys/syscall.h>
415 # ifdef SYS_clock_gettime
416 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
417 # undef EV_USE_MONOTONIC
418 # define EV_USE_MONOTONIC 1
419 # define EV_NEED_SYSCALL 1
420 # else
421 # undef EV_USE_CLOCK_SYSCALL
422 # define EV_USE_CLOCK_SYSCALL 0
423 # endif
424 #endif
425
426 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
427
428 #ifndef CLOCK_MONOTONIC
429 # undef EV_USE_MONOTONIC
430 # define EV_USE_MONOTONIC 0
431 #endif
432
433 #ifndef CLOCK_REALTIME
434 # undef EV_USE_REALTIME
435 # define EV_USE_REALTIME 0
436 #endif
437
438 #if !EV_STAT_ENABLE
439 # undef EV_USE_INOTIFY
440 # define EV_USE_INOTIFY 0
441 #endif
442
443 #if !EV_USE_NANOSLEEP
444 /* hp-ux has it in sys/time.h, which we unconditionally include above */
445 # if !defined _WIN32 && !defined __hpux
446 # include <sys/select.h>
447 # endif
448 #endif
449
450 #if EV_USE_LINUXAIO
451 # include <sys/syscall.h>
452 # if !SYS_io_getevents || !EV_USE_EPOLL /* ev_linxaio uses ev_poll.c:ev_epoll_create */
453 # undef EV_USE_LINUXAIO
454 # define EV_USE_LINUXAIO 0
455 # else
456 # define EV_NEED_SYSCALL 1
457 # endif
458 #endif
459
460 #if EV_USE_IOURING
461 # include <sys/syscall.h>
462 # if !__alpha && !SYS_io_uring_setup
463 # define SYS_io_uring_setup 425
464 # define SYS_io_uring_enter 426
465 # define SYS_io_uring_wregister 427
466 # endif
467 # if SYS_io_uring_setup
468 # define EV_NEED_SYSCALL 1
469 # else
470 # undef EV_USE_IOURING
471 # define EV_USE_IOURING 0
472 # endif
473 #endif
474
475 #if EV_USE_INOTIFY
476 # include <sys/statfs.h>
477 # include <sys/inotify.h>
478 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
479 # ifndef IN_DONT_FOLLOW
480 # undef EV_USE_INOTIFY
481 # define EV_USE_INOTIFY 0
482 # endif
483 #endif
484
485 #if EV_USE_EVENTFD
486 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
487 # include <stdint.h>
488 # ifndef EFD_NONBLOCK
489 # define EFD_NONBLOCK O_NONBLOCK
490 # endif
491 # ifndef EFD_CLOEXEC
492 # ifdef O_CLOEXEC
493 # define EFD_CLOEXEC O_CLOEXEC
494 # else
495 # define EFD_CLOEXEC 02000000
496 # endif
497 # endif
498 EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
499 #endif
500
501 #if EV_USE_SIGNALFD
502 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
503 # include <stdint.h>
504 # ifndef SFD_NONBLOCK
505 # define SFD_NONBLOCK O_NONBLOCK
506 # endif
507 # ifndef SFD_CLOEXEC
508 # ifdef O_CLOEXEC
509 # define SFD_CLOEXEC O_CLOEXEC
510 # else
511 # define SFD_CLOEXEC 02000000
512 # endif
513 # endif
514 EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
515
516 struct signalfd_siginfo
517 {
518 uint32_t ssi_signo;
519 char pad[128 - sizeof (uint32_t)];
520 };
521 #endif
522
523 /*****************************************************************************/
524
525 #if EV_NEED_SYSCALL
526
527 #include <sys/syscall.h>
528
529 /*
530 * define some syscall wrappers for common architectures
531 * this is mostly for nice looks during debugging, not performance.
532 * our syscalls return < 0, not == -1, on error. which is good
533 * enough for linux aio.
534 * TODO: arm is also common nowadays, maybe even mips and x86
535 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
536 */
537 #if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
538 /* the costly errno access probably kills this for size optimisation */
539
540 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5) \
541 ({ \
542 long res; \
543 register unsigned long r5 __asm__ ("r8" ); \
544 register unsigned long r4 __asm__ ("r10"); \
545 register unsigned long r3 __asm__ ("rdx"); \
546 register unsigned long r2 __asm__ ("rsi"); \
547 register unsigned long r1 __asm__ ("rdi"); \
548 if (narg >= 5) r5 = (unsigned long)(arg5); \
549 if (narg >= 4) r4 = (unsigned long)(arg4); \
550 if (narg >= 3) r3 = (unsigned long)(arg3); \
551 if (narg >= 2) r2 = (unsigned long)(arg2); \
552 if (narg >= 1) r1 = (unsigned long)(arg1); \
553 __asm__ __volatile__ ( \
554 "syscall\n\t" \
555 : "=a" (res) \
556 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
557 : "cc", "r11", "cx", "memory"); \
558 errno = -res; \
559 res; \
560 })
561
562 #endif
563
564 #ifdef ev_syscall
565 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0
566 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0)
567 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0)
568 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0)
569 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0)
570 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5)
571 #else
572 #define ev_syscall0(nr) syscall (nr)
573 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
574 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
575 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
576 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
577 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
578 #endif
579
580 #endif
581
582 /*****************************************************************************/
583
584 #if EV_VERIFY >= 3
585 # define EV_FREQUENT_CHECK ev_verify (EV_A)
586 #else
587 # define EV_FREQUENT_CHECK do { } while (0)
588 #endif
589
590 /*
591 * This is used to work around floating point rounding problems.
592 * This value is good at least till the year 4000.
593 */
594 #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
595 /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
596
597 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
598 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
599
600 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
601 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
602
603 /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
604 /* ECB.H BEGIN */
605 /*
606 * libecb - http://software.schmorp.de/pkg/libecb
607 *
608 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
609 * Copyright (©) 2011 Emanuele Giaquinta
610 * All rights reserved.
611 *
612 * Redistribution and use in source and binary forms, with or without modifica-
613 * tion, are permitted provided that the following conditions are met:
614 *
615 * 1. Redistributions of source code must retain the above copyright notice,
616 * this list of conditions and the following disclaimer.
617 *
618 * 2. Redistributions in binary form must reproduce the above copyright
619 * notice, this list of conditions and the following disclaimer in the
620 * documentation and/or other materials provided with the distribution.
621 *
622 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
623 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
624 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
625 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
626 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
627 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
628 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
629 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
630 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
631 * OF THE POSSIBILITY OF SUCH DAMAGE.
632 *
633 * Alternatively, the contents of this file may be used under the terms of
634 * the GNU General Public License ("GPL") version 2 or any later version,
635 * in which case the provisions of the GPL are applicable instead of
636 * the above. If you wish to allow the use of your version of this file
637 * only under the terms of the GPL and not to allow others to use your
638 * version of this file under the BSD license, indicate your decision
639 * by deleting the provisions above and replace them with the notice
640 * and other provisions required by the GPL. If you do not delete the
641 * provisions above, a recipient may use your version of this file under
642 * either the BSD or the GPL.
643 */
644
645 #ifndef ECB_H
646 #define ECB_H
647
648 /* 16 bits major, 16 bits minor */
649 #define ECB_VERSION 0x00010006
650
651 #ifdef _WIN32
652 typedef signed char int8_t;
653 typedef unsigned char uint8_t;
654 typedef signed short int16_t;
655 typedef unsigned short uint16_t;
656 typedef signed int int32_t;
657 typedef unsigned int uint32_t;
658 #if __GNUC__
659 typedef signed long long int64_t;
660 typedef unsigned long long uint64_t;
661 #else /* _MSC_VER || __BORLANDC__ */
662 typedef signed __int64 int64_t;
663 typedef unsigned __int64 uint64_t;
664 #endif
665 #ifdef _WIN64
666 #define ECB_PTRSIZE 8
667 typedef uint64_t uintptr_t;
668 typedef int64_t intptr_t;
669 #else
670 #define ECB_PTRSIZE 4
671 typedef uint32_t uintptr_t;
672 typedef int32_t intptr_t;
673 #endif
674 #else
675 #include <inttypes.h>
676 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
677 #define ECB_PTRSIZE 8
678 #else
679 #define ECB_PTRSIZE 4
680 #endif
681 #endif
682
683 #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
684 #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
685
686 /* work around x32 idiocy by defining proper macros */
687 #if ECB_GCC_AMD64 || ECB_MSVC_AMD64
688 #if _ILP32
689 #define ECB_AMD64_X32 1
690 #else
691 #define ECB_AMD64 1
692 #endif
693 #endif
694
695 /* many compilers define _GNUC_ to some versions but then only implement
696 * what their idiot authors think are the "more important" extensions,
697 * causing enormous grief in return for some better fake benchmark numbers.
698 * or so.
699 * we try to detect these and simply assume they are not gcc - if they have
700 * an issue with that they should have done it right in the first place.
701 */
702 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
703 #define ECB_GCC_VERSION(major,minor) 0
704 #else
705 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
706 #endif
707
708 #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
709
710 #if __clang__ && defined __has_builtin
711 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
712 #else
713 #define ECB_CLANG_BUILTIN(x) 0
714 #endif
715
716 #if __clang__ && defined __has_extension
717 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
718 #else
719 #define ECB_CLANG_EXTENSION(x) 0
720 #endif
721
722 #define ECB_CPP (__cplusplus+0)
723 #define ECB_CPP11 (__cplusplus >= 201103L)
724 #define ECB_CPP14 (__cplusplus >= 201402L)
725 #define ECB_CPP17 (__cplusplus >= 201703L)
726
727 #if ECB_CPP
728 #define ECB_C 0
729 #define ECB_STDC_VERSION 0
730 #else
731 #define ECB_C 1
732 #define ECB_STDC_VERSION __STDC_VERSION__
733 #endif
734
735 #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
736 #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
737 #define ECB_C17 (ECB_STDC_VERSION >= 201710L)
738
739 #if ECB_CPP
740 #define ECB_EXTERN_C extern "C"
741 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
742 #define ECB_EXTERN_C_END }
743 #else
744 #define ECB_EXTERN_C extern
745 #define ECB_EXTERN_C_BEG
746 #define ECB_EXTERN_C_END
747 #endif
748
749 /*****************************************************************************/
750
751 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
752 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
753
754 #if ECB_NO_THREADS
755 #define ECB_NO_SMP 1
756 #endif
757
758 #if ECB_NO_SMP
759 #define ECB_MEMORY_FENCE do { } while (0)
760 #endif
761
762 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
763 #if __xlC__ && ECB_CPP
764 #include <builtins.h>
765 #endif
766
767 #if 1400 <= _MSC_VER
768 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
769 #endif
770
771 #ifndef ECB_MEMORY_FENCE
772 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
773 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
774 #if __i386 || __i386__
775 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
776 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
777 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
778 #elif ECB_GCC_AMD64
779 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
780 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
781 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
782 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
783 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
784 #elif defined __ARM_ARCH_2__ \
785 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
786 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
787 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
788 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
789 || defined __ARM_ARCH_5TEJ__
790 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
791 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
792 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
793 || defined __ARM_ARCH_6T2__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
795 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
796 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
797 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
798 #elif __aarch64__
799 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
800 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
801 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
802 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
803 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
804 #elif defined __s390__ || defined __s390x__
805 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
806 #elif defined __mips__
807 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
808 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
809 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
810 #elif defined __alpha__
811 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
812 #elif defined __hppa__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
814 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
815 #elif defined __ia64__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
817 #elif defined __m68k__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
819 #elif defined __m88k__
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
821 #elif defined __sh__
822 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
823 #endif
824 #endif
825 #endif
826
827 #ifndef ECB_MEMORY_FENCE
828 #if ECB_GCC_VERSION(4,7)
829 /* see comment below (stdatomic.h) about the C11 memory model. */
830 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
831 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
832 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
833 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
834
835 #elif ECB_CLANG_EXTENSION(c_atomic)
836 /* see comment below (stdatomic.h) about the C11 memory model. */
837 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
838 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
839 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
840 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
841
842 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
843 #define ECB_MEMORY_FENCE __sync_synchronize ()
844 #elif _MSC_VER >= 1500 /* VC++ 2008 */
845 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
846 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
847 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
848 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
849 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
850 #elif _MSC_VER >= 1400 /* VC++ 2005 */
851 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
852 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
853 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
854 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
855 #elif defined _WIN32
856 #include <WinNT.h>
857 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
858 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
859 #include <mbarrier.h>
860 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
861 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
862 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
863 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
864 #elif __xlC__
865 #define ECB_MEMORY_FENCE __sync ()
866 #endif
867 #endif
868
869 #ifndef ECB_MEMORY_FENCE
870 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
871 /* we assume that these memory fences work on all variables/all memory accesses, */
872 /* not just C11 atomics and atomic accesses */
873 #include <stdatomic.h>
874 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
875 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
876 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
877 #endif
878 #endif
879
880 #ifndef ECB_MEMORY_FENCE
881 #if !ECB_AVOID_PTHREADS
882 /*
883 * if you get undefined symbol references to pthread_mutex_lock,
884 * or failure to find pthread.h, then you should implement
885 * the ECB_MEMORY_FENCE operations for your cpu/compiler
886 * OR provide pthread.h and link against the posix thread library
887 * of your system.
888 */
889 #include <pthread.h>
890 #define ECB_NEEDS_PTHREADS 1
891 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
892
893 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
894 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
895 #endif
896 #endif
897
898 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
899 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
900 #endif
901
902 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
903 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
904 #endif
905
906 #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
907 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
908 #endif
909
910 /*****************************************************************************/
911
912 #if ECB_CPP
913 #define ecb_inline static inline
914 #elif ECB_GCC_VERSION(2,5)
915 #define ecb_inline static __inline__
916 #elif ECB_C99
917 #define ecb_inline static inline
918 #else
919 #define ecb_inline static
920 #endif
921
922 #if ECB_GCC_VERSION(3,3)
923 #define ecb_restrict __restrict__
924 #elif ECB_C99
925 #define ecb_restrict restrict
926 #else
927 #define ecb_restrict
928 #endif
929
930 typedef int ecb_bool;
931
932 #define ECB_CONCAT_(a, b) a ## b
933 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
934 #define ECB_STRINGIFY_(a) # a
935 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
936 #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
937
938 #define ecb_function_ ecb_inline
939
940 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
941 #define ecb_attribute(attrlist) __attribute__ (attrlist)
942 #else
943 #define ecb_attribute(attrlist)
944 #endif
945
946 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
947 #define ecb_is_constant(expr) __builtin_constant_p (expr)
948 #else
949 /* possible C11 impl for integral types
950 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
951 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
952
953 #define ecb_is_constant(expr) 0
954 #endif
955
956 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
957 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
958 #else
959 #define ecb_expect(expr,value) (expr)
960 #endif
961
962 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
963 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
964 #else
965 #define ecb_prefetch(addr,rw,locality)
966 #endif
967
968 /* no emulation for ecb_decltype */
969 #if ECB_CPP11
970 // older implementations might have problems with decltype(x)::type, work around it
971 template<class T> struct ecb_decltype_t { typedef T type; };
972 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
973 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
974 #define ecb_decltype(x) __typeof__ (x)
975 #endif
976
977 #if _MSC_VER >= 1300
978 #define ecb_deprecated __declspec (deprecated)
979 #else
980 #define ecb_deprecated ecb_attribute ((__deprecated__))
981 #endif
982
983 #if _MSC_VER >= 1500
984 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
985 #elif ECB_GCC_VERSION(4,5)
986 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
987 #else
988 #define ecb_deprecated_message(msg) ecb_deprecated
989 #endif
990
991 #if _MSC_VER >= 1400
992 #define ecb_noinline __declspec (noinline)
993 #else
994 #define ecb_noinline ecb_attribute ((__noinline__))
995 #endif
996
997 #define ecb_unused ecb_attribute ((__unused__))
998 #define ecb_const ecb_attribute ((__const__))
999 #define ecb_pure ecb_attribute ((__pure__))
1000
1001 #if ECB_C11 || __IBMC_NORETURN
1002 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1003 #define ecb_noreturn _Noreturn
1004 #elif ECB_CPP11
1005 #define ecb_noreturn [[noreturn]]
1006 #elif _MSC_VER >= 1200
1007 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1008 #define ecb_noreturn __declspec (noreturn)
1009 #else
1010 #define ecb_noreturn ecb_attribute ((__noreturn__))
1011 #endif
1012
1013 #if ECB_GCC_VERSION(4,3)
1014 #define ecb_artificial ecb_attribute ((__artificial__))
1015 #define ecb_hot ecb_attribute ((__hot__))
1016 #define ecb_cold ecb_attribute ((__cold__))
1017 #else
1018 #define ecb_artificial
1019 #define ecb_hot
1020 #define ecb_cold
1021 #endif
1022
1023 /* put around conditional expressions if you are very sure that the */
1024 /* expression is mostly true or mostly false. note that these return */
1025 /* booleans, not the expression. */
1026 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
1027 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1028 /* for compatibility to the rest of the world */
1029 #define ecb_likely(expr) ecb_expect_true (expr)
1030 #define ecb_unlikely(expr) ecb_expect_false (expr)
1031
1032 /* count trailing zero bits and count # of one bits */
1033 #if ECB_GCC_VERSION(3,4) \
1034 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1035 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1036 && ECB_CLANG_BUILTIN(__builtin_popcount))
1037 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1038 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1039 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1040 #define ecb_ctz32(x) __builtin_ctz (x)
1041 #define ecb_ctz64(x) __builtin_ctzll (x)
1042 #define ecb_popcount32(x) __builtin_popcount (x)
1043 /* no popcountll */
1044 #else
1045 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1046 ecb_function_ ecb_const int
1047 ecb_ctz32 (uint32_t x)
1048 {
1049 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1050 unsigned long r;
1051 _BitScanForward (&r, x);
1052 return (int)r;
1053 #else
1054 int r = 0;
1055
1056 x &= ~x + 1; /* this isolates the lowest bit */
1057
1058 #if ECB_branchless_on_i386
1059 r += !!(x & 0xaaaaaaaa) << 0;
1060 r += !!(x & 0xcccccccc) << 1;
1061 r += !!(x & 0xf0f0f0f0) << 2;
1062 r += !!(x & 0xff00ff00) << 3;
1063 r += !!(x & 0xffff0000) << 4;
1064 #else
1065 if (x & 0xaaaaaaaa) r += 1;
1066 if (x & 0xcccccccc) r += 2;
1067 if (x & 0xf0f0f0f0) r += 4;
1068 if (x & 0xff00ff00) r += 8;
1069 if (x & 0xffff0000) r += 16;
1070 #endif
1071
1072 return r;
1073 #endif
1074 }
1075
1076 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1077 ecb_function_ ecb_const int
1078 ecb_ctz64 (uint64_t x)
1079 {
1080 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1081 unsigned long r;
1082 _BitScanForward64 (&r, x);
1083 return (int)r;
1084 #else
1085 int shift = x & 0xffffffff ? 0 : 32;
1086 return ecb_ctz32 (x >> shift) + shift;
1087 #endif
1088 }
1089
1090 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1091 ecb_function_ ecb_const int
1092 ecb_popcount32 (uint32_t x)
1093 {
1094 x -= (x >> 1) & 0x55555555;
1095 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1096 x = ((x >> 4) + x) & 0x0f0f0f0f;
1097 x *= 0x01010101;
1098
1099 return x >> 24;
1100 }
1101
1102 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1103 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1104 {
1105 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1106 unsigned long r;
1107 _BitScanReverse (&r, x);
1108 return (int)r;
1109 #else
1110 int r = 0;
1111
1112 if (x >> 16) { x >>= 16; r += 16; }
1113 if (x >> 8) { x >>= 8; r += 8; }
1114 if (x >> 4) { x >>= 4; r += 4; }
1115 if (x >> 2) { x >>= 2; r += 2; }
1116 if (x >> 1) { r += 1; }
1117
1118 return r;
1119 #endif
1120 }
1121
1122 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1123 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1124 {
1125 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1126 unsigned long r;
1127 _BitScanReverse64 (&r, x);
1128 return (int)r;
1129 #else
1130 int r = 0;
1131
1132 if (x >> 32) { x >>= 32; r += 32; }
1133
1134 return r + ecb_ld32 (x);
1135 #endif
1136 }
1137 #endif
1138
1139 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1140 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1141 ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1142 ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1143
1144 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1145 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1146 {
1147 return ( (x * 0x0802U & 0x22110U)
1148 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1149 }
1150
1151 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1152 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1153 {
1154 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1155 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1156 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1157 x = ( x >> 8 ) | ( x << 8);
1158
1159 return x;
1160 }
1161
1162 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1163 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1164 {
1165 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1166 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1167 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1168 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1169 x = ( x >> 16 ) | ( x << 16);
1170
1171 return x;
1172 }
1173
1174 /* popcount64 is only available on 64 bit cpus as gcc builtin */
1175 /* so for this version we are lazy */
1176 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1177 ecb_function_ ecb_const int
1178 ecb_popcount64 (uint64_t x)
1179 {
1180 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1181 }
1182
1183 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1184 ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1185 ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1186 ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1187 ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1188 ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1189 ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1190 ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1191
1192 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1193 ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1194 ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1195 ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1196 ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1197 ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1198 ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1199 ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1200
1201 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1202 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1203 #define ecb_bswap16(x) __builtin_bswap16 (x)
1204 #else
1205 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1206 #endif
1207 #define ecb_bswap32(x) __builtin_bswap32 (x)
1208 #define ecb_bswap64(x) __builtin_bswap64 (x)
1209 #elif _MSC_VER
1210 #include <stdlib.h>
1211 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1212 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1213 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1214 #else
1215 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1216 ecb_function_ ecb_const uint16_t
1217 ecb_bswap16 (uint16_t x)
1218 {
1219 return ecb_rotl16 (x, 8);
1220 }
1221
1222 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1223 ecb_function_ ecb_const uint32_t
1224 ecb_bswap32 (uint32_t x)
1225 {
1226 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1227 }
1228
1229 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1230 ecb_function_ ecb_const uint64_t
1231 ecb_bswap64 (uint64_t x)
1232 {
1233 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1234 }
1235 #endif
1236
1237 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1238 #define ecb_unreachable() __builtin_unreachable ()
1239 #else
1240 /* this seems to work fine, but gcc always emits a warning for it :/ */
1241 ecb_inline ecb_noreturn void ecb_unreachable (void);
1242 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1243 #endif
1244
1245 /* try to tell the compiler that some condition is definitely true */
1246 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1247
1248 ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1249 ecb_inline ecb_const uint32_t
1250 ecb_byteorder_helper (void)
1251 {
1252 /* the union code still generates code under pressure in gcc, */
1253 /* but less than using pointers, and always seems to */
1254 /* successfully return a constant. */
1255 /* the reason why we have this horrible preprocessor mess */
1256 /* is to avoid it in all cases, at least on common architectures */
1257 /* or when using a recent enough gcc version (>= 4.6) */
1258 #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1259 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1260 #define ECB_LITTLE_ENDIAN 1
1261 return 0x44332211;
1262 #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1263 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1264 #define ECB_BIG_ENDIAN 1
1265 return 0x11223344;
1266 #else
1267 union
1268 {
1269 uint8_t c[4];
1270 uint32_t u;
1271 } u = { 0x11, 0x22, 0x33, 0x44 };
1272 return u.u;
1273 #endif
1274 }
1275
1276 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1277 ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1278 ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1279 ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1280
1281 #if ECB_GCC_VERSION(3,0) || ECB_C99
1282 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1283 #else
1284 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1285 #endif
1286
1287 #if ECB_CPP
1288 template<typename T>
1289 static inline T ecb_div_rd (T val, T div)
1290 {
1291 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1292 }
1293 template<typename T>
1294 static inline T ecb_div_ru (T val, T div)
1295 {
1296 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1297 }
1298 #else
1299 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1300 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1301 #endif
1302
1303 #if ecb_cplusplus_does_not_suck
1304 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1305 template<typename T, int N>
1306 static inline int ecb_array_length (const T (&arr)[N])
1307 {
1308 return N;
1309 }
1310 #else
1311 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1312 #endif
1313
1314 ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1315 ecb_function_ ecb_const uint32_t
1316 ecb_binary16_to_binary32 (uint32_t x)
1317 {
1318 unsigned int s = (x & 0x8000) << (31 - 15);
1319 int e = (x >> 10) & 0x001f;
1320 unsigned int m = x & 0x03ff;
1321
1322 if (ecb_expect_false (e == 31))
1323 /* infinity or NaN */
1324 e = 255 - (127 - 15);
1325 else if (ecb_expect_false (!e))
1326 {
1327 if (ecb_expect_true (!m))
1328 /* zero, handled by code below by forcing e to 0 */
1329 e = 0 - (127 - 15);
1330 else
1331 {
1332 /* subnormal, renormalise */
1333 unsigned int s = 10 - ecb_ld32 (m);
1334
1335 m = (m << s) & 0x3ff; /* mask implicit bit */
1336 e -= s - 1;
1337 }
1338 }
1339
1340 /* e and m now are normalised, or zero, (or inf or nan) */
1341 e += 127 - 15;
1342
1343 return s | (e << 23) | (m << (23 - 10));
1344 }
1345
1346 ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1347 ecb_function_ ecb_const uint16_t
1348 ecb_binary32_to_binary16 (uint32_t x)
1349 {
1350 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1351 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1352 unsigned int m = x & 0x007fffff;
1353
1354 x &= 0x7fffffff;
1355
1356 /* if it's within range of binary16 normals, use fast path */
1357 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1358 {
1359 /* mantissa round-to-even */
1360 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1361
1362 /* handle overflow */
1363 if (ecb_expect_false (m >= 0x00800000))
1364 {
1365 m >>= 1;
1366 e += 1;
1367 }
1368
1369 return s | (e << 10) | (m >> (23 - 10));
1370 }
1371
1372 /* handle large numbers and infinity */
1373 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1374 return s | 0x7c00;
1375
1376 /* handle zero, subnormals and small numbers */
1377 if (ecb_expect_true (x < 0x38800000))
1378 {
1379 /* zero */
1380 if (ecb_expect_true (!x))
1381 return s;
1382
1383 /* handle subnormals */
1384
1385 /* too small, will be zero */
1386 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1387 return s;
1388
1389 m |= 0x00800000; /* make implicit bit explicit */
1390
1391 /* very tricky - we need to round to the nearest e (+10) bit value */
1392 {
1393 unsigned int bits = 14 - e;
1394 unsigned int half = (1 << (bits - 1)) - 1;
1395 unsigned int even = (m >> bits) & 1;
1396
1397 /* if this overflows, we will end up with a normalised number */
1398 m = (m + half + even) >> bits;
1399 }
1400
1401 return s | m;
1402 }
1403
1404 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1405 m >>= 13;
1406
1407 return s | 0x7c00 | m | !m;
1408 }
1409
1410 /*******************************************************************************/
1411 /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1412
1413 /* basically, everything uses "ieee pure-endian" floating point numbers */
1414 /* the only noteworthy exception is ancient armle, which uses order 43218765 */
1415 #if 0 \
1416 || __i386 || __i386__ \
1417 || ECB_GCC_AMD64 \
1418 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1419 || defined __s390__ || defined __s390x__ \
1420 || defined __mips__ \
1421 || defined __alpha__ \
1422 || defined __hppa__ \
1423 || defined __ia64__ \
1424 || defined __m68k__ \
1425 || defined __m88k__ \
1426 || defined __sh__ \
1427 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1428 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1429 || defined __aarch64__
1430 #define ECB_STDFP 1
1431 #include <string.h> /* for memcpy */
1432 #else
1433 #define ECB_STDFP 0
1434 #endif
1435
1436 #ifndef ECB_NO_LIBM
1437
1438 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1439
1440 /* only the oldest of old doesn't have this one. solaris. */
1441 #ifdef INFINITY
1442 #define ECB_INFINITY INFINITY
1443 #else
1444 #define ECB_INFINITY HUGE_VAL
1445 #endif
1446
1447 #ifdef NAN
1448 #define ECB_NAN NAN
1449 #else
1450 #define ECB_NAN ECB_INFINITY
1451 #endif
1452
1453 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1454 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1455 #define ecb_frexpf(x,e) frexpf ((x), (e))
1456 #else
1457 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1458 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1459 #endif
1460
1461 /* convert a float to ieee single/binary32 */
1462 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1463 ecb_function_ ecb_const uint32_t
1464 ecb_float_to_binary32 (float x)
1465 {
1466 uint32_t r;
1467
1468 #if ECB_STDFP
1469 memcpy (&r, &x, 4);
1470 #else
1471 /* slow emulation, works for anything but -0 */
1472 uint32_t m;
1473 int e;
1474
1475 if (x == 0e0f ) return 0x00000000U;
1476 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1477 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1478 if (x != x ) return 0x7fbfffffU;
1479
1480 m = ecb_frexpf (x, &e) * 0x1000000U;
1481
1482 r = m & 0x80000000U;
1483
1484 if (r)
1485 m = -m;
1486
1487 if (e <= -126)
1488 {
1489 m &= 0xffffffU;
1490 m >>= (-125 - e);
1491 e = -126;
1492 }
1493
1494 r |= (e + 126) << 23;
1495 r |= m & 0x7fffffU;
1496 #endif
1497
1498 return r;
1499 }
1500
1501 /* converts an ieee single/binary32 to a float */
1502 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1503 ecb_function_ ecb_const float
1504 ecb_binary32_to_float (uint32_t x)
1505 {
1506 float r;
1507
1508 #if ECB_STDFP
1509 memcpy (&r, &x, 4);
1510 #else
1511 /* emulation, only works for normals and subnormals and +0 */
1512 int neg = x >> 31;
1513 int e = (x >> 23) & 0xffU;
1514
1515 x &= 0x7fffffU;
1516
1517 if (e)
1518 x |= 0x800000U;
1519 else
1520 e = 1;
1521
1522 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1523 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1524
1525 r = neg ? -r : r;
1526 #endif
1527
1528 return r;
1529 }
1530
1531 /* convert a double to ieee double/binary64 */
1532 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1533 ecb_function_ ecb_const uint64_t
1534 ecb_double_to_binary64 (double x)
1535 {
1536 uint64_t r;
1537
1538 #if ECB_STDFP
1539 memcpy (&r, &x, 8);
1540 #else
1541 /* slow emulation, works for anything but -0 */
1542 uint64_t m;
1543 int e;
1544
1545 if (x == 0e0 ) return 0x0000000000000000U;
1546 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1547 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1548 if (x != x ) return 0X7ff7ffffffffffffU;
1549
1550 m = frexp (x, &e) * 0x20000000000000U;
1551
1552 r = m & 0x8000000000000000;;
1553
1554 if (r)
1555 m = -m;
1556
1557 if (e <= -1022)
1558 {
1559 m &= 0x1fffffffffffffU;
1560 m >>= (-1021 - e);
1561 e = -1022;
1562 }
1563
1564 r |= ((uint64_t)(e + 1022)) << 52;
1565 r |= m & 0xfffffffffffffU;
1566 #endif
1567
1568 return r;
1569 }
1570
1571 /* converts an ieee double/binary64 to a double */
1572 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1573 ecb_function_ ecb_const double
1574 ecb_binary64_to_double (uint64_t x)
1575 {
1576 double r;
1577
1578 #if ECB_STDFP
1579 memcpy (&r, &x, 8);
1580 #else
1581 /* emulation, only works for normals and subnormals and +0 */
1582 int neg = x >> 63;
1583 int e = (x >> 52) & 0x7ffU;
1584
1585 x &= 0xfffffffffffffU;
1586
1587 if (e)
1588 x |= 0x10000000000000U;
1589 else
1590 e = 1;
1591
1592 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1593 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1594
1595 r = neg ? -r : r;
1596 #endif
1597
1598 return r;
1599 }
1600
1601 /* convert a float to ieee half/binary16 */
1602 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1603 ecb_function_ ecb_const uint16_t
1604 ecb_float_to_binary16 (float x)
1605 {
1606 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1607 }
1608
1609 /* convert an ieee half/binary16 to float */
1610 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1611 ecb_function_ ecb_const float
1612 ecb_binary16_to_float (uint16_t x)
1613 {
1614 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1615 }
1616
1617 #endif
1618
1619 #endif
1620
1621 /* ECB.H END */
1622
1623 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1624 /* if your architecture doesn't need memory fences, e.g. because it is
1625 * single-cpu/core, or if you use libev in a project that doesn't use libev
1626 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1627 * libev, in which cases the memory fences become nops.
1628 * alternatively, you can remove this #error and link against libpthread,
1629 * which will then provide the memory fences.
1630 */
1631 # error "memory fences not defined for your architecture, please report"
1632 #endif
1633
1634 #ifndef ECB_MEMORY_FENCE
1635 # define ECB_MEMORY_FENCE do { } while (0)
1636 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1637 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1638 #endif
1639
1640 #define inline_size ecb_inline
1641
1642 #if EV_FEATURE_CODE
1643 # define inline_speed ecb_inline
1644 #else
1645 # define inline_speed ecb_noinline static
1646 #endif
1647
1648 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1649
1650 #if EV_MINPRI == EV_MAXPRI
1651 # define ABSPRI(w) (((W)w), 0)
1652 #else
1653 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1654 #endif
1655
1656 #define EMPTY /* required for microsofts broken pseudo-c compiler */
1657
1658 typedef ev_watcher *W;
1659 typedef ev_watcher_list *WL;
1660 typedef ev_watcher_time *WT;
1661
1662 #define ev_active(w) ((W)(w))->active
1663 #define ev_at(w) ((WT)(w))->at
1664
1665 #if EV_USE_REALTIME
1666 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
1667 /* giving it a reasonably high chance of working on typical architectures */
1668 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1669 #endif
1670
1671 #if EV_USE_MONOTONIC
1672 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1673 #endif
1674
1675 #ifndef EV_FD_TO_WIN32_HANDLE
1676 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1677 #endif
1678 #ifndef EV_WIN32_HANDLE_TO_FD
1679 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1680 #endif
1681 #ifndef EV_WIN32_CLOSE_FD
1682 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1683 #endif
1684
1685 #ifdef _WIN32
1686 # include "ev_win32.c"
1687 #endif
1688
1689 /*****************************************************************************/
1690
1691 #if EV_USE_LINUXAIO
1692 # include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1693 #endif
1694
1695 /* define a suitable floor function (only used by periodics atm) */
1696
1697 #if EV_USE_FLOOR
1698 # include <math.h>
1699 # define ev_floor(v) floor (v)
1700 #else
1701
1702 #include <float.h>
1703
1704 /* a floor() replacement function, should be independent of ev_tstamp type */
1705 ecb_noinline
1706 static ev_tstamp
1707 ev_floor (ev_tstamp v)
1708 {
1709 /* the choice of shift factor is not terribly important */
1710 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1711 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1712 #else
1713 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1714 #endif
1715
1716 /* argument too large for an unsigned long? */
1717 if (ecb_expect_false (v >= shift))
1718 {
1719 ev_tstamp f;
1720
1721 if (v == v - 1.)
1722 return v; /* very large number */
1723
1724 f = shift * ev_floor (v * (1. / shift));
1725 return f + ev_floor (v - f);
1726 }
1727
1728 /* special treatment for negative args? */
1729 if (ecb_expect_false (v < 0.))
1730 {
1731 ev_tstamp f = -ev_floor (-v);
1732
1733 return f - (f == v ? 0 : 1);
1734 }
1735
1736 /* fits into an unsigned long */
1737 return (unsigned long)v;
1738 }
1739
1740 #endif
1741
1742 /*****************************************************************************/
1743
1744 #ifdef __linux
1745 # include <sys/utsname.h>
1746 #endif
1747
1748 ecb_noinline ecb_cold
1749 static unsigned int
1750 ev_linux_version (void)
1751 {
1752 #ifdef __linux
1753 unsigned int v = 0;
1754 struct utsname buf;
1755 int i;
1756 char *p = buf.release;
1757
1758 if (uname (&buf))
1759 return 0;
1760
1761 for (i = 3+1; --i; )
1762 {
1763 unsigned int c = 0;
1764
1765 for (;;)
1766 {
1767 if (*p >= '0' && *p <= '9')
1768 c = c * 10 + *p++ - '0';
1769 else
1770 {
1771 p += *p == '.';
1772 break;
1773 }
1774 }
1775
1776 v = (v << 8) | c;
1777 }
1778
1779 return v;
1780 #else
1781 return 0;
1782 #endif
1783 }
1784
1785 /*****************************************************************************/
1786
1787 #if EV_AVOID_STDIO
1788 ecb_noinline ecb_cold
1789 static void
1790 ev_printerr (const char *msg)
1791 {
1792 write (STDERR_FILENO, msg, strlen (msg));
1793 }
1794 #endif
1795
1796 static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
1797
1798 ecb_cold
1799 void
1800 ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
1801 {
1802 syserr_cb = cb;
1803 }
1804
1805 ecb_noinline ecb_cold
1806 static void
1807 ev_syserr (const char *msg)
1808 {
1809 if (!msg)
1810 msg = "(libev) system error";
1811
1812 if (syserr_cb)
1813 syserr_cb (msg);
1814 else
1815 {
1816 #if EV_AVOID_STDIO
1817 ev_printerr (msg);
1818 ev_printerr (": ");
1819 ev_printerr (strerror (errno));
1820 ev_printerr ("\n");
1821 #else
1822 perror (msg);
1823 #endif
1824 abort ();
1825 }
1826 }
1827
1828 static void *
1829 ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
1830 {
1831 /* some systems, notably openbsd and darwin, fail to properly
1832 * implement realloc (x, 0) (as required by both ansi c-89 and
1833 * the single unix specification, so work around them here.
1834 * recently, also (at least) fedora and debian started breaking it,
1835 * despite documenting it otherwise.
1836 */
1837
1838 if (size)
1839 return realloc (ptr, size);
1840
1841 free (ptr);
1842 return 0;
1843 }
1844
1845 static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
1846
1847 ecb_cold
1848 void
1849 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
1850 {
1851 alloc = cb;
1852 }
1853
1854 inline_speed void *
1855 ev_realloc (void *ptr, long size)
1856 {
1857 ptr = alloc (ptr, size);
1858
1859 if (!ptr && size)
1860 {
1861 #if EV_AVOID_STDIO
1862 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1863 #else
1864 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1865 #endif
1866 abort ();
1867 }
1868
1869 return ptr;
1870 }
1871
1872 #define ev_malloc(size) ev_realloc (0, (size))
1873 #define ev_free(ptr) ev_realloc ((ptr), 0)
1874
1875 /*****************************************************************************/
1876
1877 /* set in reify when reification needed */
1878 #define EV_ANFD_REIFY 1
1879
1880 /* file descriptor info structure */
1881 typedef struct
1882 {
1883 WL head;
1884 unsigned char events; /* the events watched for */
1885 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1886 unsigned char emask; /* some backends store the actual kernel mask in here */
1887 unsigned char unused;
1888 #if EV_USE_EPOLL
1889 unsigned int egen; /* generation counter to counter epoll bugs */
1890 #endif
1891 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1892 SOCKET handle;
1893 #endif
1894 #if EV_USE_IOCP
1895 OVERLAPPED or, ow;
1896 #endif
1897 } ANFD;
1898
1899 /* stores the pending event set for a given watcher */
1900 typedef struct
1901 {
1902 W w;
1903 int events; /* the pending event set for the given watcher */
1904 } ANPENDING;
1905
1906 #if EV_USE_INOTIFY
1907 /* hash table entry per inotify-id */
1908 typedef struct
1909 {
1910 WL head;
1911 } ANFS;
1912 #endif
1913
1914 /* Heap Entry */
1915 #if EV_HEAP_CACHE_AT
1916 /* a heap element */
1917 typedef struct {
1918 ev_tstamp at;
1919 WT w;
1920 } ANHE;
1921
1922 #define ANHE_w(he) (he).w /* access watcher, read-write */
1923 #define ANHE_at(he) (he).at /* access cached at, read-only */
1924 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1925 #else
1926 /* a heap element */
1927 typedef WT ANHE;
1928
1929 #define ANHE_w(he) (he)
1930 #define ANHE_at(he) (he)->at
1931 #define ANHE_at_cache(he)
1932 #endif
1933
1934 #if EV_MULTIPLICITY
1935
1936 struct ev_loop
1937 {
1938 ev_tstamp ev_rt_now;
1939 #define ev_rt_now ((loop)->ev_rt_now)
1940 #define VAR(name,decl) decl;
1941 #include "ev_vars.h"
1942 #undef VAR
1943 };
1944 #include "ev_wrap.h"
1945
1946 static struct ev_loop default_loop_struct;
1947 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1948
1949 #else
1950
1951 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1952 #define VAR(name,decl) static decl;
1953 #include "ev_vars.h"
1954 #undef VAR
1955
1956 static int ev_default_loop_ptr;
1957
1958 #endif
1959
1960 #if EV_FEATURE_API
1961 # define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
1962 # define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
1963 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1964 #else
1965 # define EV_RELEASE_CB (void)0
1966 # define EV_ACQUIRE_CB (void)0
1967 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1968 #endif
1969
1970 #define EVBREAK_RECURSE 0x80
1971
1972 /*****************************************************************************/
1973
1974 #ifndef EV_HAVE_EV_TIME
1975 ev_tstamp
1976 ev_time (void) EV_NOEXCEPT
1977 {
1978 #if EV_USE_REALTIME
1979 if (ecb_expect_true (have_realtime))
1980 {
1981 struct timespec ts;
1982 clock_gettime (CLOCK_REALTIME, &ts);
1983 return ts.tv_sec + ts.tv_nsec * 1e-9;
1984 }
1985 #endif
1986
1987 struct timeval tv;
1988 gettimeofday (&tv, 0);
1989 return tv.tv_sec + tv.tv_usec * 1e-6;
1990 }
1991 #endif
1992
1993 inline_size ev_tstamp
1994 get_clock (void)
1995 {
1996 #if EV_USE_MONOTONIC
1997 if (ecb_expect_true (have_monotonic))
1998 {
1999 struct timespec ts;
2000 clock_gettime (CLOCK_MONOTONIC, &ts);
2001 return ts.tv_sec + ts.tv_nsec * 1e-9;
2002 }
2003 #endif
2004
2005 return ev_time ();
2006 }
2007
2008 #if EV_MULTIPLICITY
2009 ev_tstamp
2010 ev_now (EV_P) EV_NOEXCEPT
2011 {
2012 return ev_rt_now;
2013 }
2014 #endif
2015
2016 void
2017 ev_sleep (ev_tstamp delay) EV_NOEXCEPT
2018 {
2019 if (delay > 0.)
2020 {
2021 #if EV_USE_NANOSLEEP
2022 struct timespec ts;
2023
2024 EV_TS_SET (ts, delay);
2025 nanosleep (&ts, 0);
2026 #elif defined _WIN32
2027 /* maybe this should round up, as ms is very low resolution */
2028 /* compared to select (µs) or nanosleep (ns) */
2029 Sleep ((unsigned long)(delay * 1e3));
2030 #else
2031 struct timeval tv;
2032
2033 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
2034 /* something not guaranteed by newer posix versions, but guaranteed */
2035 /* by older ones */
2036 EV_TV_SET (tv, delay);
2037 select (0, 0, 0, 0, &tv);
2038 #endif
2039 }
2040 }
2041
2042 /*****************************************************************************/
2043
2044 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
2045
2046 /* find a suitable new size for the given array, */
2047 /* hopefully by rounding to a nice-to-malloc size */
2048 inline_size int
2049 array_nextsize (int elem, int cur, int cnt)
2050 {
2051 int ncur = cur + 1;
2052
2053 do
2054 ncur <<= 1;
2055 while (cnt > ncur);
2056
2057 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
2058 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
2059 {
2060 ncur *= elem;
2061 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
2062 ncur = ncur - sizeof (void *) * 4;
2063 ncur /= elem;
2064 }
2065
2066 return ncur;
2067 }
2068
2069 ecb_noinline ecb_cold
2070 static void *
2071 array_realloc (int elem, void *base, int *cur, int cnt)
2072 {
2073 *cur = array_nextsize (elem, *cur, cnt);
2074 return ev_realloc (base, elem * *cur);
2075 }
2076
2077 #define array_needsize_noinit(base,offset,count)
2078
2079 #define array_needsize_zerofill(base,offset,count) \
2080 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
2081
2082 #define array_needsize(type,base,cur,cnt,init) \
2083 if (ecb_expect_false ((cnt) > (cur))) \
2084 { \
2085 ecb_unused int ocur_ = (cur); \
2086 (base) = (type *)array_realloc \
2087 (sizeof (type), (base), &(cur), (cnt)); \
2088 init ((base), ocur_, ((cur) - ocur_)); \
2089 }
2090
2091 #if 0
2092 #define array_slim(type,stem) \
2093 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
2094 { \
2095 stem ## max = array_roundsize (stem ## cnt >> 1); \
2096 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
2097 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
2098 }
2099 #endif
2100
2101 #define array_free(stem, idx) \
2102 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
2103
2104 /*****************************************************************************/
2105
2106 /* dummy callback for pending events */
2107 ecb_noinline
2108 static void
2109 pendingcb (EV_P_ ev_prepare *w, int revents)
2110 {
2111 }
2112
2113 ecb_noinline
2114 void
2115 ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
2116 {
2117 W w_ = (W)w;
2118 int pri = ABSPRI (w_);
2119
2120 if (ecb_expect_false (w_->pending))
2121 pendings [pri][w_->pending - 1].events |= revents;
2122 else
2123 {
2124 w_->pending = ++pendingcnt [pri];
2125 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
2126 pendings [pri][w_->pending - 1].w = w_;
2127 pendings [pri][w_->pending - 1].events = revents;
2128 }
2129
2130 pendingpri = NUMPRI - 1;
2131 }
2132
2133 inline_speed void
2134 feed_reverse (EV_P_ W w)
2135 {
2136 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
2137 rfeeds [rfeedcnt++] = w;
2138 }
2139
2140 inline_size void
2141 feed_reverse_done (EV_P_ int revents)
2142 {
2143 do
2144 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2145 while (rfeedcnt);
2146 }
2147
2148 inline_speed void
2149 queue_events (EV_P_ W *events, int eventcnt, int type)
2150 {
2151 int i;
2152
2153 for (i = 0; i < eventcnt; ++i)
2154 ev_feed_event (EV_A_ events [i], type);
2155 }
2156
2157 /*****************************************************************************/
2158
2159 inline_speed void
2160 fd_event_nocheck (EV_P_ int fd, int revents)
2161 {
2162 ANFD *anfd = anfds + fd;
2163 ev_io *w;
2164
2165 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2166 {
2167 int ev = w->events & revents;
2168
2169 if (ev)
2170 ev_feed_event (EV_A_ (W)w, ev);
2171 }
2172 }
2173
2174 /* do not submit kernel events for fds that have reify set */
2175 /* because that means they changed while we were polling for new events */
2176 inline_speed void
2177 fd_event (EV_P_ int fd, int revents)
2178 {
2179 ANFD *anfd = anfds + fd;
2180
2181 if (ecb_expect_true (!anfd->reify))
2182 fd_event_nocheck (EV_A_ fd, revents);
2183 }
2184
2185 void
2186 ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
2187 {
2188 if (fd >= 0 && fd < anfdmax)
2189 fd_event_nocheck (EV_A_ fd, revents);
2190 }
2191
2192 /* make sure the external fd watch events are in-sync */
2193 /* with the kernel/libev internal state */
2194 inline_size void
2195 fd_reify (EV_P)
2196 {
2197 int i;
2198
2199 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2200 for (i = 0; i < fdchangecnt; ++i)
2201 {
2202 int fd = fdchanges [i];
2203 ANFD *anfd = anfds + fd;
2204
2205 if (anfd->reify & EV__IOFDSET && anfd->head)
2206 {
2207 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2208
2209 if (handle != anfd->handle)
2210 {
2211 unsigned long arg;
2212
2213 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2214
2215 /* handle changed, but fd didn't - we need to do it in two steps */
2216 backend_modify (EV_A_ fd, anfd->events, 0);
2217 anfd->events = 0;
2218 anfd->handle = handle;
2219 }
2220 }
2221 }
2222 #endif
2223
2224 for (i = 0; i < fdchangecnt; ++i)
2225 {
2226 int fd = fdchanges [i];
2227 ANFD *anfd = anfds + fd;
2228 ev_io *w;
2229
2230 unsigned char o_events = anfd->events;
2231 unsigned char o_reify = anfd->reify;
2232
2233 anfd->reify = 0;
2234
2235 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
2236 {
2237 anfd->events = 0;
2238
2239 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2240 anfd->events |= (unsigned char)w->events;
2241
2242 if (o_events != anfd->events)
2243 o_reify = EV__IOFDSET; /* actually |= */
2244 }
2245
2246 if (o_reify & EV__IOFDSET)
2247 backend_modify (EV_A_ fd, o_events, anfd->events);
2248 }
2249
2250 fdchangecnt = 0;
2251 }
2252
2253 /* something about the given fd changed */
2254 inline_size
2255 void
2256 fd_change (EV_P_ int fd, int flags)
2257 {
2258 unsigned char reify = anfds [fd].reify;
2259 anfds [fd].reify |= flags;
2260
2261 if (ecb_expect_true (!reify))
2262 {
2263 ++fdchangecnt;
2264 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
2265 fdchanges [fdchangecnt - 1] = fd;
2266 }
2267 }
2268
2269 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2270 inline_speed ecb_cold void
2271 fd_kill (EV_P_ int fd)
2272 {
2273 ev_io *w;
2274
2275 while ((w = (ev_io *)anfds [fd].head))
2276 {
2277 ev_io_stop (EV_A_ w);
2278 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
2279 }
2280 }
2281
2282 /* check whether the given fd is actually valid, for error recovery */
2283 inline_size ecb_cold int
2284 fd_valid (int fd)
2285 {
2286 #ifdef _WIN32
2287 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
2288 #else
2289 return fcntl (fd, F_GETFD) != -1;
2290 #endif
2291 }
2292
2293 /* called on EBADF to verify fds */
2294 ecb_noinline ecb_cold
2295 static void
2296 fd_ebadf (EV_P)
2297 {
2298 int fd;
2299
2300 for (fd = 0; fd < anfdmax; ++fd)
2301 if (anfds [fd].events)
2302 if (!fd_valid (fd) && errno == EBADF)
2303 fd_kill (EV_A_ fd);
2304 }
2305
2306 /* called on ENOMEM in select/poll to kill some fds and retry */
2307 ecb_noinline ecb_cold
2308 static void
2309 fd_enomem (EV_P)
2310 {
2311 int fd;
2312
2313 for (fd = anfdmax; fd--; )
2314 if (anfds [fd].events)
2315 {
2316 fd_kill (EV_A_ fd);
2317 break;
2318 }
2319 }
2320
2321 /* usually called after fork if backend needs to re-arm all fds from scratch */
2322 ecb_noinline
2323 static void
2324 fd_rearm_all (EV_P)
2325 {
2326 int fd;
2327
2328 for (fd = 0; fd < anfdmax; ++fd)
2329 if (anfds [fd].events)
2330 {
2331 anfds [fd].events = 0;
2332 anfds [fd].emask = 0;
2333 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
2334 }
2335 }
2336
2337 /* used to prepare libev internal fd's */
2338 /* this is not fork-safe */
2339 inline_speed void
2340 fd_intern (int fd)
2341 {
2342 #ifdef _WIN32
2343 unsigned long arg = 1;
2344 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2345 #else
2346 fcntl (fd, F_SETFD, FD_CLOEXEC);
2347 fcntl (fd, F_SETFL, O_NONBLOCK);
2348 #endif
2349 }
2350
2351 /*****************************************************************************/
2352
2353 /*
2354 * the heap functions want a real array index. array index 0 is guaranteed to not
2355 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2356 * the branching factor of the d-tree.
2357 */
2358
2359 /*
2360 * at the moment we allow libev the luxury of two heaps,
2361 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2362 * which is more cache-efficient.
2363 * the difference is about 5% with 50000+ watchers.
2364 */
2365 #if EV_USE_4HEAP
2366
2367 #define DHEAP 4
2368 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
2369 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2370 #define UPHEAP_DONE(p,k) ((p) == (k))
2371
2372 /* away from the root */
2373 inline_speed void
2374 downheap (ANHE *heap, int N, int k)
2375 {
2376 ANHE he = heap [k];
2377 ANHE *E = heap + N + HEAP0;
2378
2379 for (;;)
2380 {
2381 ev_tstamp minat;
2382 ANHE *minpos;
2383 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2384
2385 /* find minimum child */
2386 if (ecb_expect_true (pos + DHEAP - 1 < E))
2387 {
2388 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2389 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2390 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2391 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2392 }
2393 else if (pos < E)
2394 {
2395 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2396 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2397 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2398 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2399 }
2400 else
2401 break;
2402
2403 if (ANHE_at (he) <= minat)
2404 break;
2405
2406 heap [k] = *minpos;
2407 ev_active (ANHE_w (*minpos)) = k;
2408
2409 k = minpos - heap;
2410 }
2411
2412 heap [k] = he;
2413 ev_active (ANHE_w (he)) = k;
2414 }
2415
2416 #else /* 4HEAP */
2417
2418 #define HEAP0 1
2419 #define HPARENT(k) ((k) >> 1)
2420 #define UPHEAP_DONE(p,k) (!(p))
2421
2422 /* away from the root */
2423 inline_speed void
2424 downheap (ANHE *heap, int N, int k)
2425 {
2426 ANHE he = heap [k];
2427
2428 for (;;)
2429 {
2430 int c = k << 1;
2431
2432 if (c >= N + HEAP0)
2433 break;
2434
2435 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2436 ? 1 : 0;
2437
2438 if (ANHE_at (he) <= ANHE_at (heap [c]))
2439 break;
2440
2441 heap [k] = heap [c];
2442 ev_active (ANHE_w (heap [k])) = k;
2443
2444 k = c;
2445 }
2446
2447 heap [k] = he;
2448 ev_active (ANHE_w (he)) = k;
2449 }
2450 #endif
2451
2452 /* towards the root */
2453 inline_speed void
2454 upheap (ANHE *heap, int k)
2455 {
2456 ANHE he = heap [k];
2457
2458 for (;;)
2459 {
2460 int p = HPARENT (k);
2461
2462 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2463 break;
2464
2465 heap [k] = heap [p];
2466 ev_active (ANHE_w (heap [k])) = k;
2467 k = p;
2468 }
2469
2470 heap [k] = he;
2471 ev_active (ANHE_w (he)) = k;
2472 }
2473
2474 /* move an element suitably so it is in a correct place */
2475 inline_size void
2476 adjustheap (ANHE *heap, int N, int k)
2477 {
2478 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2479 upheap (heap, k);
2480 else
2481 downheap (heap, N, k);
2482 }
2483
2484 /* rebuild the heap: this function is used only once and executed rarely */
2485 inline_size void
2486 reheap (ANHE *heap, int N)
2487 {
2488 int i;
2489
2490 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2491 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2492 for (i = 0; i < N; ++i)
2493 upheap (heap, i + HEAP0);
2494 }
2495
2496 /*****************************************************************************/
2497
2498 /* associate signal watchers to a signal signal */
2499 typedef struct
2500 {
2501 EV_ATOMIC_T pending;
2502 #if EV_MULTIPLICITY
2503 EV_P;
2504 #endif
2505 WL head;
2506 } ANSIG;
2507
2508 static ANSIG signals [EV_NSIG - 1];
2509
2510 /*****************************************************************************/
2511
2512 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2513
2514 ecb_noinline ecb_cold
2515 static void
2516 evpipe_init (EV_P)
2517 {
2518 if (!ev_is_active (&pipe_w))
2519 {
2520 int fds [2];
2521
2522 # if EV_USE_EVENTFD
2523 fds [0] = -1;
2524 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2525 if (fds [1] < 0 && errno == EINVAL)
2526 fds [1] = eventfd (0, 0);
2527
2528 if (fds [1] < 0)
2529 # endif
2530 {
2531 while (pipe (fds))
2532 ev_syserr ("(libev) error creating signal/async pipe");
2533
2534 fd_intern (fds [0]);
2535 }
2536
2537 evpipe [0] = fds [0];
2538
2539 if (evpipe [1] < 0)
2540 evpipe [1] = fds [1]; /* first call, set write fd */
2541 else
2542 {
2543 /* on subsequent calls, do not change evpipe [1] */
2544 /* so that evpipe_write can always rely on its value. */
2545 /* this branch does not do anything sensible on windows, */
2546 /* so must not be executed on windows */
2547
2548 dup2 (fds [1], evpipe [1]);
2549 close (fds [1]);
2550 }
2551
2552 fd_intern (evpipe [1]);
2553
2554 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2555 ev_io_start (EV_A_ &pipe_w);
2556 ev_unref (EV_A); /* watcher should not keep loop alive */
2557 }
2558 }
2559
2560 inline_speed void
2561 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2562 {
2563 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2564
2565 if (ecb_expect_true (*flag))
2566 return;
2567
2568 *flag = 1;
2569 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2570
2571 pipe_write_skipped = 1;
2572
2573 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2574
2575 if (pipe_write_wanted)
2576 {
2577 int old_errno;
2578
2579 pipe_write_skipped = 0;
2580 ECB_MEMORY_FENCE_RELEASE;
2581
2582 old_errno = errno; /* save errno because write will clobber it */
2583
2584 #if EV_USE_EVENTFD
2585 if (evpipe [0] < 0)
2586 {
2587 uint64_t counter = 1;
2588 write (evpipe [1], &counter, sizeof (uint64_t));
2589 }
2590 else
2591 #endif
2592 {
2593 #ifdef _WIN32
2594 WSABUF buf;
2595 DWORD sent;
2596 buf.buf = (char *)&buf;
2597 buf.len = 1;
2598 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2599 #else
2600 write (evpipe [1], &(evpipe [1]), 1);
2601 #endif
2602 }
2603
2604 errno = old_errno;
2605 }
2606 }
2607
2608 /* called whenever the libev signal pipe */
2609 /* got some events (signal, async) */
2610 static void
2611 pipecb (EV_P_ ev_io *iow, int revents)
2612 {
2613 int i;
2614
2615 if (revents & EV_READ)
2616 {
2617 #if EV_USE_EVENTFD
2618 if (evpipe [0] < 0)
2619 {
2620 uint64_t counter;
2621 read (evpipe [1], &counter, sizeof (uint64_t));
2622 }
2623 else
2624 #endif
2625 {
2626 char dummy[4];
2627 #ifdef _WIN32
2628 WSABUF buf;
2629 DWORD recvd;
2630 DWORD flags = 0;
2631 buf.buf = dummy;
2632 buf.len = sizeof (dummy);
2633 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2634 #else
2635 read (evpipe [0], &dummy, sizeof (dummy));
2636 #endif
2637 }
2638 }
2639
2640 pipe_write_skipped = 0;
2641
2642 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2643
2644 #if EV_SIGNAL_ENABLE
2645 if (sig_pending)
2646 {
2647 sig_pending = 0;
2648
2649 ECB_MEMORY_FENCE;
2650
2651 for (i = EV_NSIG - 1; i--; )
2652 if (ecb_expect_false (signals [i].pending))
2653 ev_feed_signal_event (EV_A_ i + 1);
2654 }
2655 #endif
2656
2657 #if EV_ASYNC_ENABLE
2658 if (async_pending)
2659 {
2660 async_pending = 0;
2661
2662 ECB_MEMORY_FENCE;
2663
2664 for (i = asynccnt; i--; )
2665 if (asyncs [i]->sent)
2666 {
2667 asyncs [i]->sent = 0;
2668 ECB_MEMORY_FENCE_RELEASE;
2669 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2670 }
2671 }
2672 #endif
2673 }
2674
2675 /*****************************************************************************/
2676
2677 void
2678 ev_feed_signal (int signum) EV_NOEXCEPT
2679 {
2680 #if EV_MULTIPLICITY
2681 EV_P;
2682 ECB_MEMORY_FENCE_ACQUIRE;
2683 EV_A = signals [signum - 1].loop;
2684
2685 if (!EV_A)
2686 return;
2687 #endif
2688
2689 signals [signum - 1].pending = 1;
2690 evpipe_write (EV_A_ &sig_pending);
2691 }
2692
2693 static void
2694 ev_sighandler (int signum)
2695 {
2696 #ifdef _WIN32
2697 signal (signum, ev_sighandler);
2698 #endif
2699
2700 ev_feed_signal (signum);
2701 }
2702
2703 ecb_noinline
2704 void
2705 ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2706 {
2707 WL w;
2708
2709 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
2710 return;
2711
2712 --signum;
2713
2714 #if EV_MULTIPLICITY
2715 /* it is permissible to try to feed a signal to the wrong loop */
2716 /* or, likely more useful, feeding a signal nobody is waiting for */
2717
2718 if (ecb_expect_false (signals [signum].loop != EV_A))
2719 return;
2720 #endif
2721
2722 signals [signum].pending = 0;
2723 ECB_MEMORY_FENCE_RELEASE;
2724
2725 for (w = signals [signum].head; w; w = w->next)
2726 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2727 }
2728
2729 #if EV_USE_SIGNALFD
2730 static void
2731 sigfdcb (EV_P_ ev_io *iow, int revents)
2732 {
2733 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2734
2735 for (;;)
2736 {
2737 ssize_t res = read (sigfd, si, sizeof (si));
2738
2739 /* not ISO-C, as res might be -1, but works with SuS */
2740 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2741 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2742
2743 if (res < (ssize_t)sizeof (si))
2744 break;
2745 }
2746 }
2747 #endif
2748
2749 #endif
2750
2751 /*****************************************************************************/
2752
2753 #if EV_CHILD_ENABLE
2754 static WL childs [EV_PID_HASHSIZE];
2755
2756 static ev_signal childev;
2757
2758 #ifndef WIFCONTINUED
2759 # define WIFCONTINUED(status) 0
2760 #endif
2761
2762 /* handle a single child status event */
2763 inline_speed void
2764 child_reap (EV_P_ int chain, int pid, int status)
2765 {
2766 ev_child *w;
2767 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2768
2769 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2770 {
2771 if ((w->pid == pid || !w->pid)
2772 && (!traced || (w->flags & 1)))
2773 {
2774 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2775 w->rpid = pid;
2776 w->rstatus = status;
2777 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2778 }
2779 }
2780 }
2781
2782 #ifndef WCONTINUED
2783 # define WCONTINUED 0
2784 #endif
2785
2786 /* called on sigchld etc., calls waitpid */
2787 static void
2788 childcb (EV_P_ ev_signal *sw, int revents)
2789 {
2790 int pid, status;
2791
2792 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2793 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2794 if (!WCONTINUED
2795 || errno != EINVAL
2796 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2797 return;
2798
2799 /* make sure we are called again until all children have been reaped */
2800 /* we need to do it this way so that the callback gets called before we continue */
2801 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2802
2803 child_reap (EV_A_ pid, pid, status);
2804 if ((EV_PID_HASHSIZE) > 1)
2805 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2806 }
2807
2808 #endif
2809
2810 /*****************************************************************************/
2811
2812 #if EV_USE_IOCP
2813 # include "ev_iocp.c"
2814 #endif
2815 #if EV_USE_PORT
2816 # include "ev_port.c"
2817 #endif
2818 #if EV_USE_KQUEUE
2819 # include "ev_kqueue.c"
2820 #endif
2821 #if EV_USE_EPOLL
2822 # include "ev_epoll.c"
2823 #endif
2824 #if EV_USE_LINUXAIO
2825 # include "ev_linuxaio.c"
2826 #endif
2827 #if EV_USE_IOURING
2828 # include "ev_iouring.c"
2829 #endif
2830 #if EV_USE_POLL
2831 # include "ev_poll.c"
2832 #endif
2833 #if EV_USE_SELECT
2834 # include "ev_select.c"
2835 #endif
2836
2837 ecb_cold int
2838 ev_version_major (void) EV_NOEXCEPT
2839 {
2840 return EV_VERSION_MAJOR;
2841 }
2842
2843 ecb_cold int
2844 ev_version_minor (void) EV_NOEXCEPT
2845 {
2846 return EV_VERSION_MINOR;
2847 }
2848
2849 /* return true if we are running with elevated privileges and should ignore env variables */
2850 inline_size ecb_cold int
2851 enable_secure (void)
2852 {
2853 #ifdef _WIN32
2854 return 0;
2855 #else
2856 return getuid () != geteuid ()
2857 || getgid () != getegid ();
2858 #endif
2859 }
2860
2861 ecb_cold
2862 unsigned int
2863 ev_supported_backends (void) EV_NOEXCEPT
2864 {
2865 unsigned int flags = 0;
2866
2867 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2868 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
2869 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2870 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2871 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
2872 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2873 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
2874
2875 return flags;
2876 }
2877
2878 ecb_cold
2879 unsigned int
2880 ev_recommended_backends (void) EV_NOEXCEPT
2881 {
2882 unsigned int flags = ev_supported_backends ();
2883
2884 #ifndef __NetBSD__
2885 /* kqueue is borked on everything but netbsd apparently */
2886 /* it usually doesn't work correctly on anything but sockets and pipes */
2887 flags &= ~EVBACKEND_KQUEUE;
2888 #endif
2889 #ifdef __APPLE__
2890 /* only select works correctly on that "unix-certified" platform */
2891 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2892 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2893 #endif
2894 #ifdef __FreeBSD__
2895 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2896 #endif
2897
2898 /* TODO: linuxaio is very experimental */
2899 #if !EV_RECOMMEND_LINUXAIO
2900 flags &= ~EVBACKEND_LINUXAIO;
2901 #endif
2902 /* TODO: linuxaio is super experimental */
2903 #if !EV_RECOMMEND_IOURING
2904 flags &= ~EVBACKEND_IOURING;
2905 #endif
2906
2907 return flags;
2908 }
2909
2910 ecb_cold
2911 unsigned int
2912 ev_embeddable_backends (void) EV_NOEXCEPT
2913 {
2914 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2915
2916 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2917 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2918 flags &= ~EVBACKEND_EPOLL;
2919
2920 return flags;
2921 }
2922
2923 unsigned int
2924 ev_backend (EV_P) EV_NOEXCEPT
2925 {
2926 return backend;
2927 }
2928
2929 #if EV_FEATURE_API
2930 unsigned int
2931 ev_iteration (EV_P) EV_NOEXCEPT
2932 {
2933 return loop_count;
2934 }
2935
2936 unsigned int
2937 ev_depth (EV_P) EV_NOEXCEPT
2938 {
2939 return loop_depth;
2940 }
2941
2942 void
2943 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
2944 {
2945 io_blocktime = interval;
2946 }
2947
2948 void
2949 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
2950 {
2951 timeout_blocktime = interval;
2952 }
2953
2954 void
2955 ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2956 {
2957 userdata = data;
2958 }
2959
2960 void *
2961 ev_userdata (EV_P) EV_NOEXCEPT
2962 {
2963 return userdata;
2964 }
2965
2966 void
2967 ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2968 {
2969 invoke_cb = invoke_pending_cb;
2970 }
2971
2972 void
2973 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2974 {
2975 release_cb = release;
2976 acquire_cb = acquire;
2977 }
2978 #endif
2979
2980 /* initialise a loop structure, must be zero-initialised */
2981 ecb_noinline ecb_cold
2982 static void
2983 loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
2984 {
2985 if (!backend)
2986 {
2987 origflags = flags;
2988
2989 #if EV_USE_REALTIME
2990 if (!have_realtime)
2991 {
2992 struct timespec ts;
2993
2994 if (!clock_gettime (CLOCK_REALTIME, &ts))
2995 have_realtime = 1;
2996 }
2997 #endif
2998
2999 #if EV_USE_MONOTONIC
3000 if (!have_monotonic)
3001 {
3002 struct timespec ts;
3003
3004 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
3005 have_monotonic = 1;
3006 }
3007 #endif
3008
3009 /* pid check not overridable via env */
3010 #ifndef _WIN32
3011 if (flags & EVFLAG_FORKCHECK)
3012 curpid = getpid ();
3013 #endif
3014
3015 if (!(flags & EVFLAG_NOENV)
3016 && !enable_secure ()
3017 && getenv ("LIBEV_FLAGS"))
3018 flags = atoi (getenv ("LIBEV_FLAGS"));
3019
3020 ev_rt_now = ev_time ();
3021 mn_now = get_clock ();
3022 now_floor = mn_now;
3023 rtmn_diff = ev_rt_now - mn_now;
3024 #if EV_FEATURE_API
3025 invoke_cb = ev_invoke_pending;
3026 #endif
3027
3028 io_blocktime = 0.;
3029 timeout_blocktime = 0.;
3030 backend = 0;
3031 backend_fd = -1;
3032 sig_pending = 0;
3033 #if EV_ASYNC_ENABLE
3034 async_pending = 0;
3035 #endif
3036 pipe_write_skipped = 0;
3037 pipe_write_wanted = 0;
3038 evpipe [0] = -1;
3039 evpipe [1] = -1;
3040 #if EV_USE_INOTIFY
3041 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3042 #endif
3043 #if EV_USE_SIGNALFD
3044 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3045 #endif
3046
3047 if (!(flags & EVBACKEND_MASK))
3048 flags |= ev_recommended_backends ();
3049
3050 #if EV_USE_IOCP
3051 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3052 #endif
3053 #if EV_USE_PORT
3054 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
3055 #endif
3056 #if EV_USE_KQUEUE
3057 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3058 #endif
3059 #if EV_USE_IOURING
3060 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3061 #endif
3062 #if EV_USE_LINUXAIO
3063 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
3064 #endif
3065 #if EV_USE_EPOLL
3066 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
3067 #endif
3068 #if EV_USE_POLL
3069 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
3070 #endif
3071 #if EV_USE_SELECT
3072 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
3073 #endif
3074
3075 ev_prepare_init (&pending_w, pendingcb);
3076
3077 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3078 ev_init (&pipe_w, pipecb);
3079 ev_set_priority (&pipe_w, EV_MAXPRI);
3080 #endif
3081 }
3082 }
3083
3084 /* free up a loop structure */
3085 ecb_cold
3086 void
3087 ev_loop_destroy (EV_P)
3088 {
3089 int i;
3090
3091 #if EV_MULTIPLICITY
3092 /* mimic free (0) */
3093 if (!EV_A)
3094 return;
3095 #endif
3096
3097 #if EV_CLEANUP_ENABLE
3098 /* queue cleanup watchers (and execute them) */
3099 if (ecb_expect_false (cleanupcnt))
3100 {
3101 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3102 EV_INVOKE_PENDING;
3103 }
3104 #endif
3105
3106 #if EV_CHILD_ENABLE
3107 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3108 {
3109 ev_ref (EV_A); /* child watcher */
3110 ev_signal_stop (EV_A_ &childev);
3111 }
3112 #endif
3113
3114 if (ev_is_active (&pipe_w))
3115 {
3116 /*ev_ref (EV_A);*/
3117 /*ev_io_stop (EV_A_ &pipe_w);*/
3118
3119 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3120 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3121 }
3122
3123 #if EV_USE_SIGNALFD
3124 if (ev_is_active (&sigfd_w))
3125 close (sigfd);
3126 #endif
3127
3128 #if EV_USE_INOTIFY
3129 if (fs_fd >= 0)
3130 close (fs_fd);
3131 #endif
3132
3133 if (backend_fd >= 0)
3134 close (backend_fd);
3135
3136 #if EV_USE_IOCP
3137 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3138 #endif
3139 #if EV_USE_PORT
3140 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
3141 #endif
3142 #if EV_USE_KQUEUE
3143 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3144 #endif
3145 #if EV_USE_IOURING
3146 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3147 #endif
3148 #if EV_USE_LINUXAIO
3149 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
3150 #endif
3151 #if EV_USE_EPOLL
3152 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
3153 #endif
3154 #if EV_USE_POLL
3155 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
3156 #endif
3157 #if EV_USE_SELECT
3158 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
3159 #endif
3160
3161 for (i = NUMPRI; i--; )
3162 {
3163 array_free (pending, [i]);
3164 #if EV_IDLE_ENABLE
3165 array_free (idle, [i]);
3166 #endif
3167 }
3168
3169 ev_free (anfds); anfds = 0; anfdmax = 0;
3170
3171 /* have to use the microsoft-never-gets-it-right macro */
3172 array_free (rfeed, EMPTY);
3173 array_free (fdchange, EMPTY);
3174 array_free (timer, EMPTY);
3175 #if EV_PERIODIC_ENABLE
3176 array_free (periodic, EMPTY);
3177 #endif
3178 #if EV_FORK_ENABLE
3179 array_free (fork, EMPTY);
3180 #endif
3181 #if EV_CLEANUP_ENABLE
3182 array_free (cleanup, EMPTY);
3183 #endif
3184 array_free (prepare, EMPTY);
3185 array_free (check, EMPTY);
3186 #if EV_ASYNC_ENABLE
3187 array_free (async, EMPTY);
3188 #endif
3189
3190 backend = 0;
3191
3192 #if EV_MULTIPLICITY
3193 if (ev_is_default_loop (EV_A))
3194 #endif
3195 ev_default_loop_ptr = 0;
3196 #if EV_MULTIPLICITY
3197 else
3198 ev_free (EV_A);
3199 #endif
3200 }
3201
3202 #if EV_USE_INOTIFY
3203 inline_size void infy_fork (EV_P);
3204 #endif
3205
3206 inline_size void
3207 loop_fork (EV_P)
3208 {
3209 #if EV_USE_PORT
3210 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
3211 #endif
3212 #if EV_USE_KQUEUE
3213 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3214 #endif
3215 #if EV_USE_IOURING
3216 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3217 #endif
3218 #if EV_USE_LINUXAIO
3219 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
3220 #endif
3221 #if EV_USE_EPOLL
3222 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
3223 #endif
3224 #if EV_USE_INOTIFY
3225 infy_fork (EV_A);
3226 #endif
3227
3228 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3229 if (ev_is_active (&pipe_w) && postfork != 2)
3230 {
3231 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3232
3233 ev_ref (EV_A);
3234 ev_io_stop (EV_A_ &pipe_w);
3235
3236 if (evpipe [0] >= 0)
3237 EV_WIN32_CLOSE_FD (evpipe [0]);
3238
3239 evpipe_init (EV_A);
3240 /* iterate over everything, in case we missed something before */
3241 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3242 }
3243 #endif
3244
3245 postfork = 0;
3246 }
3247
3248 #if EV_MULTIPLICITY
3249
3250 ecb_cold
3251 struct ev_loop *
3252 ev_loop_new (unsigned int flags) EV_NOEXCEPT
3253 {
3254 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3255
3256 memset (EV_A, 0, sizeof (struct ev_loop));
3257 loop_init (EV_A_ flags);
3258
3259 if (ev_backend (EV_A))
3260 return EV_A;
3261
3262 ev_free (EV_A);
3263 return 0;
3264 }
3265
3266 #endif /* multiplicity */
3267
3268 #if EV_VERIFY
3269 ecb_noinline ecb_cold
3270 static void
3271 verify_watcher (EV_P_ W w)
3272 {
3273 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3274
3275 if (w->pending)
3276 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3277 }
3278
3279 ecb_noinline ecb_cold
3280 static void
3281 verify_heap (EV_P_ ANHE *heap, int N)
3282 {
3283 int i;
3284
3285 for (i = HEAP0; i < N + HEAP0; ++i)
3286 {
3287 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3288 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3289 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3290
3291 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3292 }
3293 }
3294
3295 ecb_noinline ecb_cold
3296 static void
3297 array_verify (EV_P_ W *ws, int cnt)
3298 {
3299 while (cnt--)
3300 {
3301 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3302 verify_watcher (EV_A_ ws [cnt]);
3303 }
3304 }
3305 #endif
3306
3307 #if EV_FEATURE_API
3308 void ecb_cold
3309 ev_verify (EV_P) EV_NOEXCEPT
3310 {
3311 #if EV_VERIFY
3312 int i;
3313 WL w, w2;
3314
3315 assert (activecnt >= -1);
3316
3317 assert (fdchangemax >= fdchangecnt);
3318 for (i = 0; i < fdchangecnt; ++i)
3319 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3320
3321 assert (anfdmax >= 0);
3322 for (i = 0; i < anfdmax; ++i)
3323 {
3324 int j = 0;
3325
3326 for (w = w2 = anfds [i].head; w; w = w->next)
3327 {
3328 verify_watcher (EV_A_ (W)w);
3329
3330 if (j++ & 1)
3331 {
3332 assert (("libev: io watcher list contains a loop", w != w2));
3333 w2 = w2->next;
3334 }
3335
3336 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3337 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3338 }
3339 }
3340
3341 assert (timermax >= timercnt);
3342 verify_heap (EV_A_ timers, timercnt);
3343
3344 #if EV_PERIODIC_ENABLE
3345 assert (periodicmax >= periodiccnt);
3346 verify_heap (EV_A_ periodics, periodiccnt);
3347 #endif
3348
3349 for (i = NUMPRI; i--; )
3350 {
3351 assert (pendingmax [i] >= pendingcnt [i]);
3352 #if EV_IDLE_ENABLE
3353 assert (idleall >= 0);
3354 assert (idlemax [i] >= idlecnt [i]);
3355 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3356 #endif
3357 }
3358
3359 #if EV_FORK_ENABLE
3360 assert (forkmax >= forkcnt);
3361 array_verify (EV_A_ (W *)forks, forkcnt);
3362 #endif
3363
3364 #if EV_CLEANUP_ENABLE
3365 assert (cleanupmax >= cleanupcnt);
3366 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3367 #endif
3368
3369 #if EV_ASYNC_ENABLE
3370 assert (asyncmax >= asynccnt);
3371 array_verify (EV_A_ (W *)asyncs, asynccnt);
3372 #endif
3373
3374 #if EV_PREPARE_ENABLE
3375 assert (preparemax >= preparecnt);
3376 array_verify (EV_A_ (W *)prepares, preparecnt);
3377 #endif
3378
3379 #if EV_CHECK_ENABLE
3380 assert (checkmax >= checkcnt);
3381 array_verify (EV_A_ (W *)checks, checkcnt);
3382 #endif
3383
3384 # if 0
3385 #if EV_CHILD_ENABLE
3386 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3387 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3388 #endif
3389 # endif
3390 #endif
3391 }
3392 #endif
3393
3394 #if EV_MULTIPLICITY
3395 ecb_cold
3396 struct ev_loop *
3397 #else
3398 int
3399 #endif
3400 ev_default_loop (unsigned int flags) EV_NOEXCEPT
3401 {
3402 if (!ev_default_loop_ptr)
3403 {
3404 #if EV_MULTIPLICITY
3405 EV_P = ev_default_loop_ptr = &default_loop_struct;
3406 #else
3407 ev_default_loop_ptr = 1;
3408 #endif
3409
3410 loop_init (EV_A_ flags);
3411
3412 if (ev_backend (EV_A))
3413 {
3414 #if EV_CHILD_ENABLE
3415 ev_signal_init (&childev, childcb, SIGCHLD);
3416 ev_set_priority (&childev, EV_MAXPRI);
3417 ev_signal_start (EV_A_ &childev);
3418 ev_unref (EV_A); /* child watcher should not keep loop alive */
3419 #endif
3420 }
3421 else
3422 ev_default_loop_ptr = 0;
3423 }
3424
3425 return ev_default_loop_ptr;
3426 }
3427
3428 void
3429 ev_loop_fork (EV_P) EV_NOEXCEPT
3430 {
3431 postfork = 1;
3432 }
3433
3434 /*****************************************************************************/
3435
3436 void
3437 ev_invoke (EV_P_ void *w, int revents)
3438 {
3439 EV_CB_INVOKE ((W)w, revents);
3440 }
3441
3442 unsigned int
3443 ev_pending_count (EV_P) EV_NOEXCEPT
3444 {
3445 int pri;
3446 unsigned int count = 0;
3447
3448 for (pri = NUMPRI; pri--; )
3449 count += pendingcnt [pri];
3450
3451 return count;
3452 }
3453
3454 ecb_noinline
3455 void
3456 ev_invoke_pending (EV_P)
3457 {
3458 pendingpri = NUMPRI;
3459
3460 do
3461 {
3462 --pendingpri;
3463
3464 /* pendingpri possibly gets modified in the inner loop */
3465 while (pendingcnt [pendingpri])
3466 {
3467 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3468
3469 p->w->pending = 0;
3470 EV_CB_INVOKE (p->w, p->events);
3471 EV_FREQUENT_CHECK;
3472 }
3473 }
3474 while (pendingpri);
3475 }
3476
3477 #if EV_IDLE_ENABLE
3478 /* make idle watchers pending. this handles the "call-idle */
3479 /* only when higher priorities are idle" logic */
3480 inline_size void
3481 idle_reify (EV_P)
3482 {
3483 if (ecb_expect_false (idleall))
3484 {
3485 int pri;
3486
3487 for (pri = NUMPRI; pri--; )
3488 {
3489 if (pendingcnt [pri])
3490 break;
3491
3492 if (idlecnt [pri])
3493 {
3494 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3495 break;
3496 }
3497 }
3498 }
3499 }
3500 #endif
3501
3502 /* make timers pending */
3503 inline_size void
3504 timers_reify (EV_P)
3505 {
3506 EV_FREQUENT_CHECK;
3507
3508 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3509 {
3510 do
3511 {
3512 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3513
3514 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3515
3516 /* first reschedule or stop timer */
3517 if (w->repeat)
3518 {
3519 ev_at (w) += w->repeat;
3520 if (ev_at (w) < mn_now)
3521 ev_at (w) = mn_now;
3522
3523 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3524
3525 ANHE_at_cache (timers [HEAP0]);
3526 downheap (timers, timercnt, HEAP0);
3527 }
3528 else
3529 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3530
3531 EV_FREQUENT_CHECK;
3532 feed_reverse (EV_A_ (W)w);
3533 }
3534 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3535
3536 feed_reverse_done (EV_A_ EV_TIMER);
3537 }
3538 }
3539
3540 #if EV_PERIODIC_ENABLE
3541
3542 ecb_noinline
3543 static void
3544 periodic_recalc (EV_P_ ev_periodic *w)
3545 {
3546 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3547 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3548
3549 /* the above almost always errs on the low side */
3550 while (at <= ev_rt_now)
3551 {
3552 ev_tstamp nat = at + w->interval;
3553
3554 /* when resolution fails us, we use ev_rt_now */
3555 if (ecb_expect_false (nat == at))
3556 {
3557 at = ev_rt_now;
3558 break;
3559 }
3560
3561 at = nat;
3562 }
3563
3564 ev_at (w) = at;
3565 }
3566
3567 /* make periodics pending */
3568 inline_size void
3569 periodics_reify (EV_P)
3570 {
3571 EV_FREQUENT_CHECK;
3572
3573 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3574 {
3575 do
3576 {
3577 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3578
3579 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3580
3581 /* first reschedule or stop timer */
3582 if (w->reschedule_cb)
3583 {
3584 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3585
3586 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3587
3588 ANHE_at_cache (periodics [HEAP0]);
3589 downheap (periodics, periodiccnt, HEAP0);
3590 }
3591 else if (w->interval)
3592 {
3593 periodic_recalc (EV_A_ w);
3594 ANHE_at_cache (periodics [HEAP0]);
3595 downheap (periodics, periodiccnt, HEAP0);
3596 }
3597 else
3598 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3599
3600 EV_FREQUENT_CHECK;
3601 feed_reverse (EV_A_ (W)w);
3602 }
3603 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3604
3605 feed_reverse_done (EV_A_ EV_PERIODIC);
3606 }
3607 }
3608
3609 /* simply recalculate all periodics */
3610 /* TODO: maybe ensure that at least one event happens when jumping forward? */
3611 ecb_noinline ecb_cold
3612 static void
3613 periodics_reschedule (EV_P)
3614 {
3615 int i;
3616
3617 /* adjust periodics after time jump */
3618 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3619 {
3620 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3621
3622 if (w->reschedule_cb)
3623 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3624 else if (w->interval)
3625 periodic_recalc (EV_A_ w);
3626
3627 ANHE_at_cache (periodics [i]);
3628 }
3629
3630 reheap (periodics, periodiccnt);
3631 }
3632 #endif
3633
3634 /* adjust all timers by a given offset */
3635 ecb_noinline ecb_cold
3636 static void
3637 timers_reschedule (EV_P_ ev_tstamp adjust)
3638 {
3639 int i;
3640
3641 for (i = 0; i < timercnt; ++i)
3642 {
3643 ANHE *he = timers + i + HEAP0;
3644 ANHE_w (*he)->at += adjust;
3645 ANHE_at_cache (*he);
3646 }
3647 }
3648
3649 /* fetch new monotonic and realtime times from the kernel */
3650 /* also detect if there was a timejump, and act accordingly */
3651 inline_speed void
3652 time_update (EV_P_ ev_tstamp max_block)
3653 {
3654 #if EV_USE_MONOTONIC
3655 if (ecb_expect_true (have_monotonic))
3656 {
3657 int i;
3658 ev_tstamp odiff = rtmn_diff;
3659
3660 mn_now = get_clock ();
3661
3662 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3663 /* interpolate in the meantime */
3664 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3665 {
3666 ev_rt_now = rtmn_diff + mn_now;
3667 return;
3668 }
3669
3670 now_floor = mn_now;
3671 ev_rt_now = ev_time ();
3672
3673 /* loop a few times, before making important decisions.
3674 * on the choice of "4": one iteration isn't enough,
3675 * in case we get preempted during the calls to
3676 * ev_time and get_clock. a second call is almost guaranteed
3677 * to succeed in that case, though. and looping a few more times
3678 * doesn't hurt either as we only do this on time-jumps or
3679 * in the unlikely event of having been preempted here.
3680 */
3681 for (i = 4; --i; )
3682 {
3683 ev_tstamp diff;
3684 rtmn_diff = ev_rt_now - mn_now;
3685
3686 diff = odiff - rtmn_diff;
3687
3688 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3689 return; /* all is well */
3690
3691 ev_rt_now = ev_time ();
3692 mn_now = get_clock ();
3693 now_floor = mn_now;
3694 }
3695
3696 /* no timer adjustment, as the monotonic clock doesn't jump */
3697 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3698 # if EV_PERIODIC_ENABLE
3699 periodics_reschedule (EV_A);
3700 # endif
3701 }
3702 else
3703 #endif
3704 {
3705 ev_rt_now = ev_time ();
3706
3707 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3708 {
3709 /* adjust timers. this is easy, as the offset is the same for all of them */
3710 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3711 #if EV_PERIODIC_ENABLE
3712 periodics_reschedule (EV_A);
3713 #endif
3714 }
3715
3716 mn_now = ev_rt_now;
3717 }
3718 }
3719
3720 int
3721 ev_run (EV_P_ int flags)
3722 {
3723 #if EV_FEATURE_API
3724 ++loop_depth;
3725 #endif
3726
3727 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3728
3729 loop_done = EVBREAK_CANCEL;
3730
3731 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3732
3733 do
3734 {
3735 #if EV_VERIFY >= 2
3736 ev_verify (EV_A);
3737 #endif
3738
3739 #ifndef _WIN32
3740 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
3741 if (ecb_expect_false (getpid () != curpid))
3742 {
3743 curpid = getpid ();
3744 postfork = 1;
3745 }
3746 #endif
3747
3748 #if EV_FORK_ENABLE
3749 /* we might have forked, so queue fork handlers */
3750 if (ecb_expect_false (postfork))
3751 if (forkcnt)
3752 {
3753 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3754 EV_INVOKE_PENDING;
3755 }
3756 #endif
3757
3758 #if EV_PREPARE_ENABLE
3759 /* queue prepare watchers (and execute them) */
3760 if (ecb_expect_false (preparecnt))
3761 {
3762 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3763 EV_INVOKE_PENDING;
3764 }
3765 #endif
3766
3767 if (ecb_expect_false (loop_done))
3768 break;
3769
3770 /* we might have forked, so reify kernel state if necessary */
3771 if (ecb_expect_false (postfork))
3772 loop_fork (EV_A);
3773
3774 /* update fd-related kernel structures */
3775 fd_reify (EV_A);
3776
3777 /* calculate blocking time */
3778 {
3779 ev_tstamp waittime = 0.;
3780 ev_tstamp sleeptime = 0.;
3781
3782 /* remember old timestamp for io_blocktime calculation */
3783 ev_tstamp prev_mn_now = mn_now;
3784
3785 /* update time to cancel out callback processing overhead */
3786 time_update (EV_A_ 1e100);
3787
3788 /* from now on, we want a pipe-wake-up */
3789 pipe_write_wanted = 1;
3790
3791 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3792
3793 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3794 {
3795 waittime = MAX_BLOCKTIME;
3796
3797 if (timercnt)
3798 {
3799 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3800 if (waittime > to) waittime = to;
3801 }
3802
3803 #if EV_PERIODIC_ENABLE
3804 if (periodiccnt)
3805 {
3806 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3807 if (waittime > to) waittime = to;
3808 }
3809 #endif
3810
3811 /* don't let timeouts decrease the waittime below timeout_blocktime */
3812 if (ecb_expect_false (waittime < timeout_blocktime))
3813 waittime = timeout_blocktime;
3814
3815 /* at this point, we NEED to wait, so we have to ensure */
3816 /* to pass a minimum nonzero value to the backend */
3817 if (ecb_expect_false (waittime < backend_mintime))
3818 waittime = backend_mintime;
3819
3820 /* extra check because io_blocktime is commonly 0 */
3821 if (ecb_expect_false (io_blocktime))
3822 {
3823 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3824
3825 if (sleeptime > waittime - backend_mintime)
3826 sleeptime = waittime - backend_mintime;
3827
3828 if (ecb_expect_true (sleeptime > 0.))
3829 {
3830 ev_sleep (sleeptime);
3831 waittime -= sleeptime;
3832 }
3833 }
3834 }
3835
3836 #if EV_FEATURE_API
3837 ++loop_count;
3838 #endif
3839 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3840 backend_poll (EV_A_ waittime);
3841 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3842
3843 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3844
3845 ECB_MEMORY_FENCE_ACQUIRE;
3846 if (pipe_write_skipped)
3847 {
3848 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3849 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3850 }
3851
3852 /* update ev_rt_now, do magic */
3853 time_update (EV_A_ waittime + sleeptime);
3854 }
3855
3856 /* queue pending timers and reschedule them */
3857 timers_reify (EV_A); /* relative timers called last */
3858 #if EV_PERIODIC_ENABLE
3859 periodics_reify (EV_A); /* absolute timers called first */
3860 #endif
3861
3862 #if EV_IDLE_ENABLE
3863 /* queue idle watchers unless other events are pending */
3864 idle_reify (EV_A);
3865 #endif
3866
3867 #if EV_CHECK_ENABLE
3868 /* queue check watchers, to be executed first */
3869 if (ecb_expect_false (checkcnt))
3870 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3871 #endif
3872
3873 EV_INVOKE_PENDING;
3874 }
3875 while (ecb_expect_true (
3876 activecnt
3877 && !loop_done
3878 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3879 ));
3880
3881 if (loop_done == EVBREAK_ONE)
3882 loop_done = EVBREAK_CANCEL;
3883
3884 #if EV_FEATURE_API
3885 --loop_depth;
3886 #endif
3887
3888 return activecnt;
3889 }
3890
3891 void
3892 ev_break (EV_P_ int how) EV_NOEXCEPT
3893 {
3894 loop_done = how;
3895 }
3896
3897 void
3898 ev_ref (EV_P) EV_NOEXCEPT
3899 {
3900 ++activecnt;
3901 }
3902
3903 void
3904 ev_unref (EV_P) EV_NOEXCEPT
3905 {
3906 --activecnt;
3907 }
3908
3909 void
3910 ev_now_update (EV_P) EV_NOEXCEPT
3911 {
3912 time_update (EV_A_ 1e100);
3913 }
3914
3915 void
3916 ev_suspend (EV_P) EV_NOEXCEPT
3917 {
3918 ev_now_update (EV_A);
3919 }
3920
3921 void
3922 ev_resume (EV_P) EV_NOEXCEPT
3923 {
3924 ev_tstamp mn_prev = mn_now;
3925
3926 ev_now_update (EV_A);
3927 timers_reschedule (EV_A_ mn_now - mn_prev);
3928 #if EV_PERIODIC_ENABLE
3929 /* TODO: really do this? */
3930 periodics_reschedule (EV_A);
3931 #endif
3932 }
3933
3934 /*****************************************************************************/
3935 /* singly-linked list management, used when the expected list length is short */
3936
3937 inline_size void
3938 wlist_add (WL *head, WL elem)
3939 {
3940 elem->next = *head;
3941 *head = elem;
3942 }
3943
3944 inline_size void
3945 wlist_del (WL *head, WL elem)
3946 {
3947 while (*head)
3948 {
3949 if (ecb_expect_true (*head == elem))
3950 {
3951 *head = elem->next;
3952 break;
3953 }
3954
3955 head = &(*head)->next;
3956 }
3957 }
3958
3959 /* internal, faster, version of ev_clear_pending */
3960 inline_speed void
3961 clear_pending (EV_P_ W w)
3962 {
3963 if (w->pending)
3964 {
3965 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3966 w->pending = 0;
3967 }
3968 }
3969
3970 int
3971 ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
3972 {
3973 W w_ = (W)w;
3974 int pending = w_->pending;
3975
3976 if (ecb_expect_true (pending))
3977 {
3978 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3979 p->w = (W)&pending_w;
3980 w_->pending = 0;
3981 return p->events;
3982 }
3983 else
3984 return 0;
3985 }
3986
3987 inline_size void
3988 pri_adjust (EV_P_ W w)
3989 {
3990 int pri = ev_priority (w);
3991 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3992 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3993 ev_set_priority (w, pri);
3994 }
3995
3996 inline_speed void
3997 ev_start (EV_P_ W w, int active)
3998 {
3999 pri_adjust (EV_A_ w);
4000 w->active = active;
4001 ev_ref (EV_A);
4002 }
4003
4004 inline_size void
4005 ev_stop (EV_P_ W w)
4006 {
4007 ev_unref (EV_A);
4008 w->active = 0;
4009 }
4010
4011 /*****************************************************************************/
4012
4013 ecb_noinline
4014 void
4015 ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
4016 {
4017 int fd = w->fd;
4018
4019 if (ecb_expect_false (ev_is_active (w)))
4020 return;
4021
4022 assert (("libev: ev_io_start called with negative fd", fd >= 0));
4023 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
4024
4025 #if EV_VERIFY >= 2
4026 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4027 #endif
4028 EV_FREQUENT_CHECK;
4029
4030 ev_start (EV_A_ (W)w, 1);
4031 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
4032 wlist_add (&anfds[fd].head, (WL)w);
4033
4034 /* common bug, apparently */
4035 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
4036
4037 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
4038 w->events &= ~EV__IOFDSET;
4039
4040 EV_FREQUENT_CHECK;
4041 }
4042
4043 ecb_noinline
4044 void
4045 ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
4046 {
4047 clear_pending (EV_A_ (W)w);
4048 if (ecb_expect_false (!ev_is_active (w)))
4049 return;
4050
4051 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
4052
4053 #if EV_VERIFY >= 2
4054 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4055 #endif
4056 EV_FREQUENT_CHECK;
4057
4058 wlist_del (&anfds[w->fd].head, (WL)w);
4059 ev_stop (EV_A_ (W)w);
4060
4061 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
4062
4063 EV_FREQUENT_CHECK;
4064 }
4065
4066 ecb_noinline
4067 void
4068 ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
4069 {
4070 if (ecb_expect_false (ev_is_active (w)))
4071 return;
4072
4073 ev_at (w) += mn_now;
4074
4075 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
4076
4077 EV_FREQUENT_CHECK;
4078
4079 ++timercnt;
4080 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
4081 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
4082 ANHE_w (timers [ev_active (w)]) = (WT)w;
4083 ANHE_at_cache (timers [ev_active (w)]);
4084 upheap (timers, ev_active (w));
4085
4086 EV_FREQUENT_CHECK;
4087
4088 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
4089 }
4090
4091 ecb_noinline
4092 void
4093 ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
4094 {
4095 clear_pending (EV_A_ (W)w);
4096 if (ecb_expect_false (!ev_is_active (w)))
4097 return;
4098
4099 EV_FREQUENT_CHECK;
4100
4101 {
4102 int active = ev_active (w);
4103
4104 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
4105
4106 --timercnt;
4107
4108 if (ecb_expect_true (active < timercnt + HEAP0))
4109 {
4110 timers [active] = timers [timercnt + HEAP0];
4111 adjustheap (timers, timercnt, active);
4112 }
4113 }
4114
4115 ev_at (w) -= mn_now;
4116
4117 ev_stop (EV_A_ (W)w);
4118
4119 EV_FREQUENT_CHECK;
4120 }
4121
4122 ecb_noinline
4123 void
4124 ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
4125 {
4126 EV_FREQUENT_CHECK;
4127
4128 clear_pending (EV_A_ (W)w);
4129
4130 if (ev_is_active (w))
4131 {
4132 if (w->repeat)
4133 {
4134 ev_at (w) = mn_now + w->repeat;
4135 ANHE_at_cache (timers [ev_active (w)]);
4136 adjustheap (timers, timercnt, ev_active (w));
4137 }
4138 else
4139 ev_timer_stop (EV_A_ w);
4140 }
4141 else if (w->repeat)
4142 {
4143 ev_at (w) = w->repeat;
4144 ev_timer_start (EV_A_ w);
4145 }
4146
4147 EV_FREQUENT_CHECK;
4148 }
4149
4150 ev_tstamp
4151 ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4152 {
4153 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
4154 }
4155
4156 #if EV_PERIODIC_ENABLE
4157 ecb_noinline
4158 void
4159 ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
4160 {
4161 if (ecb_expect_false (ev_is_active (w)))
4162 return;
4163
4164 if (w->reschedule_cb)
4165 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
4166 else if (w->interval)
4167 {
4168 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
4169 periodic_recalc (EV_A_ w);
4170 }
4171 else
4172 ev_at (w) = w->offset;
4173
4174 EV_FREQUENT_CHECK;
4175
4176 ++periodiccnt;
4177 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
4178 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
4179 ANHE_w (periodics [ev_active (w)]) = (WT)w;
4180 ANHE_at_cache (periodics [ev_active (w)]);
4181 upheap (periodics, ev_active (w));
4182
4183 EV_FREQUENT_CHECK;
4184
4185 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
4186 }
4187
4188 ecb_noinline
4189 void
4190 ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
4191 {
4192 clear_pending (EV_A_ (W)w);
4193 if (ecb_expect_false (!ev_is_active (w)))
4194 return;
4195
4196 EV_FREQUENT_CHECK;
4197
4198 {
4199 int active = ev_active (w);
4200
4201 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4202
4203 --periodiccnt;
4204
4205 if (ecb_expect_true (active < periodiccnt + HEAP0))
4206 {
4207 periodics [active] = periodics [periodiccnt + HEAP0];
4208 adjustheap (periodics, periodiccnt, active);
4209 }
4210 }
4211
4212 ev_stop (EV_A_ (W)w);
4213
4214 EV_FREQUENT_CHECK;
4215 }
4216
4217 ecb_noinline
4218 void
4219 ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
4220 {
4221 /* TODO: use adjustheap and recalculation */
4222 ev_periodic_stop (EV_A_ w);
4223 ev_periodic_start (EV_A_ w);
4224 }
4225 #endif
4226
4227 #ifndef SA_RESTART
4228 # define SA_RESTART 0
4229 #endif
4230
4231 #if EV_SIGNAL_ENABLE
4232
4233 ecb_noinline
4234 void
4235 ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
4236 {
4237 if (ecb_expect_false (ev_is_active (w)))
4238 return;
4239
4240 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4241
4242 #if EV_MULTIPLICITY
4243 assert (("libev: a signal must not be attached to two different loops",
4244 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
4245
4246 signals [w->signum - 1].loop = EV_A;
4247 ECB_MEMORY_FENCE_RELEASE;
4248 #endif
4249
4250 EV_FREQUENT_CHECK;
4251
4252 #if EV_USE_SIGNALFD
4253 if (sigfd == -2)
4254 {
4255 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
4256 if (sigfd < 0 && errno == EINVAL)
4257 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
4258
4259 if (sigfd >= 0)
4260 {
4261 fd_intern (sigfd); /* doing it twice will not hurt */
4262
4263 sigemptyset (&sigfd_set);
4264
4265 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4266 ev_set_priority (&sigfd_w, EV_MAXPRI);
4267 ev_io_start (EV_A_ &sigfd_w);
4268 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4269 }
4270 }
4271
4272 if (sigfd >= 0)
4273 {
4274 /* TODO: check .head */
4275 sigaddset (&sigfd_set, w->signum);
4276 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4277
4278 signalfd (sigfd, &sigfd_set, 0);
4279 }
4280 #endif
4281
4282 ev_start (EV_A_ (W)w, 1);
4283 wlist_add (&signals [w->signum - 1].head, (WL)w);
4284
4285 if (!((WL)w)->next)
4286 # if EV_USE_SIGNALFD
4287 if (sigfd < 0) /*TODO*/
4288 # endif
4289 {
4290 # ifdef _WIN32
4291 evpipe_init (EV_A);
4292
4293 signal (w->signum, ev_sighandler);
4294 # else
4295 struct sigaction sa;
4296
4297 evpipe_init (EV_A);
4298
4299 sa.sa_handler = ev_sighandler;
4300 sigfillset (&sa.sa_mask);
4301 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
4302 sigaction (w->signum, &sa, 0);
4303
4304 if (origflags & EVFLAG_NOSIGMASK)
4305 {
4306 sigemptyset (&sa.sa_mask);
4307 sigaddset (&sa.sa_mask, w->signum);
4308 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4309 }
4310 #endif
4311 }
4312
4313 EV_FREQUENT_CHECK;
4314 }
4315
4316 ecb_noinline
4317 void
4318 ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
4319 {
4320 clear_pending (EV_A_ (W)w);
4321 if (ecb_expect_false (!ev_is_active (w)))
4322 return;
4323
4324 EV_FREQUENT_CHECK;
4325
4326 wlist_del (&signals [w->signum - 1].head, (WL)w);
4327 ev_stop (EV_A_ (W)w);
4328
4329 if (!signals [w->signum - 1].head)
4330 {
4331 #if EV_MULTIPLICITY
4332 signals [w->signum - 1].loop = 0; /* unattach from signal */
4333 #endif
4334 #if EV_USE_SIGNALFD
4335 if (sigfd >= 0)
4336 {
4337 sigset_t ss;
4338
4339 sigemptyset (&ss);
4340 sigaddset (&ss, w->signum);
4341 sigdelset (&sigfd_set, w->signum);
4342
4343 signalfd (sigfd, &sigfd_set, 0);
4344 sigprocmask (SIG_UNBLOCK, &ss, 0);
4345 }
4346 else
4347 #endif
4348 signal (w->signum, SIG_DFL);
4349 }
4350
4351 EV_FREQUENT_CHECK;
4352 }
4353
4354 #endif
4355
4356 #if EV_CHILD_ENABLE
4357
4358 void
4359 ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4360 {
4361 #if EV_MULTIPLICITY
4362 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
4363 #endif
4364 if (ecb_expect_false (ev_is_active (w)))
4365 return;
4366
4367 EV_FREQUENT_CHECK;
4368
4369 ev_start (EV_A_ (W)w, 1);
4370 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4371
4372 EV_FREQUENT_CHECK;
4373 }
4374
4375 void
4376 ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
4377 {
4378 clear_pending (EV_A_ (W)w);
4379 if (ecb_expect_false (!ev_is_active (w)))
4380 return;
4381
4382 EV_FREQUENT_CHECK;
4383
4384 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4385 ev_stop (EV_A_ (W)w);
4386
4387 EV_FREQUENT_CHECK;
4388 }
4389
4390 #endif
4391
4392 #if EV_STAT_ENABLE
4393
4394 # ifdef _WIN32
4395 # undef lstat
4396 # define lstat(a,b) _stati64 (a,b)
4397 # endif
4398
4399 #define DEF_STAT_INTERVAL 5.0074891
4400 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
4401 #define MIN_STAT_INTERVAL 0.1074891
4402
4403 ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
4404
4405 #if EV_USE_INOTIFY
4406
4407 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4408 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4409
4410 ecb_noinline
4411 static void
4412 infy_add (EV_P_ ev_stat *w)
4413 {
4414 w->wd = inotify_add_watch (fs_fd, w->path,
4415 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4416 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4417 | IN_DONT_FOLLOW | IN_MASK_ADD);
4418
4419 if (w->wd >= 0)
4420 {
4421 struct statfs sfs;
4422
4423 /* now local changes will be tracked by inotify, but remote changes won't */
4424 /* unless the filesystem is known to be local, we therefore still poll */
4425 /* also do poll on <2.6.25, but with normal frequency */
4426
4427 if (!fs_2625)
4428 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4429 else if (!statfs (w->path, &sfs)
4430 && (sfs.f_type == 0x1373 /* devfs */
4431 || sfs.f_type == 0x4006 /* fat */
4432 || sfs.f_type == 0x4d44 /* msdos */
4433 || sfs.f_type == 0xEF53 /* ext2/3 */
4434 || sfs.f_type == 0x72b6 /* jffs2 */
4435 || sfs.f_type == 0x858458f6 /* ramfs */
4436 || sfs.f_type == 0x5346544e /* ntfs */
4437 || sfs.f_type == 0x3153464a /* jfs */
4438 || sfs.f_type == 0x9123683e /* btrfs */
4439 || sfs.f_type == 0x52654973 /* reiser3 */
4440 || sfs.f_type == 0x01021994 /* tmpfs */
4441 || sfs.f_type == 0x58465342 /* xfs */))
4442 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4443 else
4444 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
4445 }
4446 else
4447 {
4448 /* can't use inotify, continue to stat */
4449 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4450
4451 /* if path is not there, monitor some parent directory for speedup hints */
4452 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4453 /* but an efficiency issue only */
4454 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4455 {
4456 char path [4096];
4457 strcpy (path, w->path);
4458
4459 do
4460 {
4461 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4462 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4463
4464 char *pend = strrchr (path, '/');
4465
4466 if (!pend || pend == path)
4467 break;
4468
4469 *pend = 0;
4470 w->wd = inotify_add_watch (fs_fd, path, mask);
4471 }
4472 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4473 }
4474 }
4475
4476 if (w->wd >= 0)
4477 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4478
4479 /* now re-arm timer, if required */
4480 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4481 ev_timer_again (EV_A_ &w->timer);
4482 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4483 }
4484
4485 ecb_noinline
4486 static void
4487 infy_del (EV_P_ ev_stat *w)
4488 {
4489 int slot;
4490 int wd = w->wd;
4491
4492 if (wd < 0)
4493 return;
4494
4495 w->wd = -2;
4496 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4497 wlist_del (&fs_hash [slot].head, (WL)w);
4498
4499 /* remove this watcher, if others are watching it, they will rearm */
4500 inotify_rm_watch (fs_fd, wd);
4501 }
4502
4503 ecb_noinline
4504 static void
4505 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4506 {
4507 if (slot < 0)
4508 /* overflow, need to check for all hash slots */
4509 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4510 infy_wd (EV_A_ slot, wd, ev);
4511 else
4512 {
4513 WL w_;
4514
4515 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4516 {
4517 ev_stat *w = (ev_stat *)w_;
4518 w_ = w_->next; /* lets us remove this watcher and all before it */
4519
4520 if (w->wd == wd || wd == -1)
4521 {
4522 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4523 {
4524 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4525 w->wd = -1;
4526 infy_add (EV_A_ w); /* re-add, no matter what */
4527 }
4528
4529 stat_timer_cb (EV_A_ &w->timer, 0);
4530 }
4531 }
4532 }
4533 }
4534
4535 static void
4536 infy_cb (EV_P_ ev_io *w, int revents)
4537 {
4538 char buf [EV_INOTIFY_BUFSIZE];
4539 int ofs;
4540 int len = read (fs_fd, buf, sizeof (buf));
4541
4542 for (ofs = 0; ofs < len; )
4543 {
4544 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4545 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4546 ofs += sizeof (struct inotify_event) + ev->len;
4547 }
4548 }
4549
4550 inline_size ecb_cold
4551 void
4552 ev_check_2625 (EV_P)
4553 {
4554 /* kernels < 2.6.25 are borked
4555 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4556 */
4557 if (ev_linux_version () < 0x020619)
4558 return;
4559
4560 fs_2625 = 1;
4561 }
4562
4563 inline_size int
4564 infy_newfd (void)
4565 {
4566 #if defined IN_CLOEXEC && defined IN_NONBLOCK
4567 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4568 if (fd >= 0)
4569 return fd;
4570 #endif
4571 return inotify_init ();
4572 }
4573
4574 inline_size void
4575 infy_init (EV_P)
4576 {
4577 if (fs_fd != -2)
4578 return;
4579
4580 fs_fd = -1;
4581
4582 ev_check_2625 (EV_A);
4583
4584 fs_fd = infy_newfd ();
4585
4586 if (fs_fd >= 0)
4587 {
4588 fd_intern (fs_fd);
4589 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4590 ev_set_priority (&fs_w, EV_MAXPRI);
4591 ev_io_start (EV_A_ &fs_w);
4592 ev_unref (EV_A);
4593 }
4594 }
4595
4596 inline_size void
4597 infy_fork (EV_P)
4598 {
4599 int slot;
4600
4601 if (fs_fd < 0)
4602 return;
4603
4604 ev_ref (EV_A);
4605 ev_io_stop (EV_A_ &fs_w);
4606 close (fs_fd);
4607 fs_fd = infy_newfd ();
4608
4609 if (fs_fd >= 0)
4610 {
4611 fd_intern (fs_fd);
4612 ev_io_set (&fs_w, fs_fd, EV_READ);
4613 ev_io_start (EV_A_ &fs_w);
4614 ev_unref (EV_A);
4615 }
4616
4617 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4618 {
4619 WL w_ = fs_hash [slot].head;
4620 fs_hash [slot].head = 0;
4621
4622 while (w_)
4623 {
4624 ev_stat *w = (ev_stat *)w_;
4625 w_ = w_->next; /* lets us add this watcher */
4626
4627 w->wd = -1;
4628
4629 if (fs_fd >= 0)
4630 infy_add (EV_A_ w); /* re-add, no matter what */
4631 else
4632 {
4633 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4634 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4635 ev_timer_again (EV_A_ &w->timer);
4636 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4637 }
4638 }
4639 }
4640 }
4641
4642 #endif
4643
4644 #ifdef _WIN32
4645 # define EV_LSTAT(p,b) _stati64 (p, b)
4646 #else
4647 # define EV_LSTAT(p,b) lstat (p, b)
4648 #endif
4649
4650 void
4651 ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
4652 {
4653 if (lstat (w->path, &w->attr) < 0)
4654 w->attr.st_nlink = 0;
4655 else if (!w->attr.st_nlink)
4656 w->attr.st_nlink = 1;
4657 }
4658
4659 ecb_noinline
4660 static void
4661 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4662 {
4663 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4664
4665 ev_statdata prev = w->attr;
4666 ev_stat_stat (EV_A_ w);
4667
4668 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4669 if (
4670 prev.st_dev != w->attr.st_dev
4671 || prev.st_ino != w->attr.st_ino
4672 || prev.st_mode != w->attr.st_mode
4673 || prev.st_nlink != w->attr.st_nlink
4674 || prev.st_uid != w->attr.st_uid
4675 || prev.st_gid != w->attr.st_gid
4676 || prev.st_rdev != w->attr.st_rdev
4677 || prev.st_size != w->attr.st_size
4678 || prev.st_atime != w->attr.st_atime
4679 || prev.st_mtime != w->attr.st_mtime
4680 || prev.st_ctime != w->attr.st_ctime
4681 ) {
4682 /* we only update w->prev on actual differences */
4683 /* in case we test more often than invoke the callback, */
4684 /* to ensure that prev is always different to attr */
4685 w->prev = prev;
4686
4687 #if EV_USE_INOTIFY
4688 if (fs_fd >= 0)
4689 {
4690 infy_del (EV_A_ w);
4691 infy_add (EV_A_ w);
4692 ev_stat_stat (EV_A_ w); /* avoid race... */
4693 }
4694 #endif
4695
4696 ev_feed_event (EV_A_ w, EV_STAT);
4697 }
4698 }
4699
4700 void
4701 ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
4702 {
4703 if (ecb_expect_false (ev_is_active (w)))
4704 return;
4705
4706 ev_stat_stat (EV_A_ w);
4707
4708 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4709 w->interval = MIN_STAT_INTERVAL;
4710
4711 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4712 ev_set_priority (&w->timer, ev_priority (w));
4713
4714 #if EV_USE_INOTIFY
4715 infy_init (EV_A);
4716
4717 if (fs_fd >= 0)
4718 infy_add (EV_A_ w);
4719 else
4720 #endif
4721 {
4722 ev_timer_again (EV_A_ &w->timer);
4723 ev_unref (EV_A);
4724 }
4725
4726 ev_start (EV_A_ (W)w, 1);
4727
4728 EV_FREQUENT_CHECK;
4729 }
4730
4731 void
4732 ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
4733 {
4734 clear_pending (EV_A_ (W)w);
4735 if (ecb_expect_false (!ev_is_active (w)))
4736 return;
4737
4738 EV_FREQUENT_CHECK;
4739
4740 #if EV_USE_INOTIFY
4741 infy_del (EV_A_ w);
4742 #endif
4743
4744 if (ev_is_active (&w->timer))
4745 {
4746 ev_ref (EV_A);
4747 ev_timer_stop (EV_A_ &w->timer);
4748 }
4749
4750 ev_stop (EV_A_ (W)w);
4751
4752 EV_FREQUENT_CHECK;
4753 }
4754 #endif
4755
4756 #if EV_IDLE_ENABLE
4757 void
4758 ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
4759 {
4760 if (ecb_expect_false (ev_is_active (w)))
4761 return;
4762
4763 pri_adjust (EV_A_ (W)w);
4764
4765 EV_FREQUENT_CHECK;
4766
4767 {
4768 int active = ++idlecnt [ABSPRI (w)];
4769
4770 ++idleall;
4771 ev_start (EV_A_ (W)w, active);
4772
4773 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
4774 idles [ABSPRI (w)][active - 1] = w;
4775 }
4776
4777 EV_FREQUENT_CHECK;
4778 }
4779
4780 void
4781 ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
4782 {
4783 clear_pending (EV_A_ (W)w);
4784 if (ecb_expect_false (!ev_is_active (w)))
4785 return;
4786
4787 EV_FREQUENT_CHECK;
4788
4789 {
4790 int active = ev_active (w);
4791
4792 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4793 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4794
4795 ev_stop (EV_A_ (W)w);
4796 --idleall;
4797 }
4798
4799 EV_FREQUENT_CHECK;
4800 }
4801 #endif
4802
4803 #if EV_PREPARE_ENABLE
4804 void
4805 ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
4806 {
4807 if (ecb_expect_false (ev_is_active (w)))
4808 return;
4809
4810 EV_FREQUENT_CHECK;
4811
4812 ev_start (EV_A_ (W)w, ++preparecnt);
4813 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
4814 prepares [preparecnt - 1] = w;
4815
4816 EV_FREQUENT_CHECK;
4817 }
4818
4819 void
4820 ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
4821 {
4822 clear_pending (EV_A_ (W)w);
4823 if (ecb_expect_false (!ev_is_active (w)))
4824 return;
4825
4826 EV_FREQUENT_CHECK;
4827
4828 {
4829 int active = ev_active (w);
4830
4831 prepares [active - 1] = prepares [--preparecnt];
4832 ev_active (prepares [active - 1]) = active;
4833 }
4834
4835 ev_stop (EV_A_ (W)w);
4836
4837 EV_FREQUENT_CHECK;
4838 }
4839 #endif
4840
4841 #if EV_CHECK_ENABLE
4842 void
4843 ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
4844 {
4845 if (ecb_expect_false (ev_is_active (w)))
4846 return;
4847
4848 EV_FREQUENT_CHECK;
4849
4850 ev_start (EV_A_ (W)w, ++checkcnt);
4851 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
4852 checks [checkcnt - 1] = w;
4853
4854 EV_FREQUENT_CHECK;
4855 }
4856
4857 void
4858 ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
4859 {
4860 clear_pending (EV_A_ (W)w);
4861 if (ecb_expect_false (!ev_is_active (w)))
4862 return;
4863
4864 EV_FREQUENT_CHECK;
4865
4866 {
4867 int active = ev_active (w);
4868
4869 checks [active - 1] = checks [--checkcnt];
4870 ev_active (checks [active - 1]) = active;
4871 }
4872
4873 ev_stop (EV_A_ (W)w);
4874
4875 EV_FREQUENT_CHECK;
4876 }
4877 #endif
4878
4879 #if EV_EMBED_ENABLE
4880 ecb_noinline
4881 void
4882 ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
4883 {
4884 ev_run (w->other, EVRUN_NOWAIT);
4885 }
4886
4887 static void
4888 embed_io_cb (EV_P_ ev_io *io, int revents)
4889 {
4890 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4891
4892 if (ev_cb (w))
4893 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4894 else
4895 ev_run (w->other, EVRUN_NOWAIT);
4896 }
4897
4898 static void
4899 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4900 {
4901 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4902
4903 {
4904 EV_P = w->other;
4905
4906 while (fdchangecnt)
4907 {
4908 fd_reify (EV_A);
4909 ev_run (EV_A_ EVRUN_NOWAIT);
4910 }
4911 }
4912 }
4913
4914 static void
4915 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4916 {
4917 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4918
4919 ev_embed_stop (EV_A_ w);
4920
4921 {
4922 EV_P = w->other;
4923
4924 ev_loop_fork (EV_A);
4925 ev_run (EV_A_ EVRUN_NOWAIT);
4926 }
4927
4928 ev_embed_start (EV_A_ w);
4929 }
4930
4931 #if 0
4932 static void
4933 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4934 {
4935 ev_idle_stop (EV_A_ idle);
4936 }
4937 #endif
4938
4939 void
4940 ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
4941 {
4942 if (ecb_expect_false (ev_is_active (w)))
4943 return;
4944
4945 {
4946 EV_P = w->other;
4947 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4948 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4949 }
4950
4951 EV_FREQUENT_CHECK;
4952
4953 ev_set_priority (&w->io, ev_priority (w));
4954 ev_io_start (EV_A_ &w->io);
4955
4956 ev_prepare_init (&w->prepare, embed_prepare_cb);
4957 ev_set_priority (&w->prepare, EV_MINPRI);
4958 ev_prepare_start (EV_A_ &w->prepare);
4959
4960 ev_fork_init (&w->fork, embed_fork_cb);
4961 ev_fork_start (EV_A_ &w->fork);
4962
4963 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4964
4965 ev_start (EV_A_ (W)w, 1);
4966
4967 EV_FREQUENT_CHECK;
4968 }
4969
4970 void
4971 ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
4972 {
4973 clear_pending (EV_A_ (W)w);
4974 if (ecb_expect_false (!ev_is_active (w)))
4975 return;
4976
4977 EV_FREQUENT_CHECK;
4978
4979 ev_io_stop (EV_A_ &w->io);
4980 ev_prepare_stop (EV_A_ &w->prepare);
4981 ev_fork_stop (EV_A_ &w->fork);
4982
4983 ev_stop (EV_A_ (W)w);
4984
4985 EV_FREQUENT_CHECK;
4986 }
4987 #endif
4988
4989 #if EV_FORK_ENABLE
4990 void
4991 ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
4992 {
4993 if (ecb_expect_false (ev_is_active (w)))
4994 return;
4995
4996 EV_FREQUENT_CHECK;
4997
4998 ev_start (EV_A_ (W)w, ++forkcnt);
4999 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
5000 forks [forkcnt - 1] = w;
5001
5002 EV_FREQUENT_CHECK;
5003 }
5004
5005 void
5006 ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
5007 {
5008 clear_pending (EV_A_ (W)w);
5009 if (ecb_expect_false (!ev_is_active (w)))
5010 return;
5011
5012 EV_FREQUENT_CHECK;
5013
5014 {
5015 int active = ev_active (w);
5016
5017 forks [active - 1] = forks [--forkcnt];
5018 ev_active (forks [active - 1]) = active;
5019 }
5020
5021 ev_stop (EV_A_ (W)w);
5022
5023 EV_FREQUENT_CHECK;
5024 }
5025 #endif
5026
5027 #if EV_CLEANUP_ENABLE
5028 void
5029 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5030 {
5031 if (ecb_expect_false (ev_is_active (w)))
5032 return;
5033
5034 EV_FREQUENT_CHECK;
5035
5036 ev_start (EV_A_ (W)w, ++cleanupcnt);
5037 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5038 cleanups [cleanupcnt - 1] = w;
5039
5040 /* cleanup watchers should never keep a refcount on the loop */
5041 ev_unref (EV_A);
5042 EV_FREQUENT_CHECK;
5043 }
5044
5045 void
5046 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5047 {
5048 clear_pending (EV_A_ (W)w);
5049 if (ecb_expect_false (!ev_is_active (w)))
5050 return;
5051
5052 EV_FREQUENT_CHECK;
5053 ev_ref (EV_A);
5054
5055 {
5056 int active = ev_active (w);
5057
5058 cleanups [active - 1] = cleanups [--cleanupcnt];
5059 ev_active (cleanups [active - 1]) = active;
5060 }
5061
5062 ev_stop (EV_A_ (W)w);
5063
5064 EV_FREQUENT_CHECK;
5065 }
5066 #endif
5067
5068 #if EV_ASYNC_ENABLE
5069 void
5070 ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
5071 {
5072 if (ecb_expect_false (ev_is_active (w)))
5073 return;
5074
5075 w->sent = 0;
5076
5077 evpipe_init (EV_A);
5078
5079 EV_FREQUENT_CHECK;
5080
5081 ev_start (EV_A_ (W)w, ++asynccnt);
5082 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
5083 asyncs [asynccnt - 1] = w;
5084
5085 EV_FREQUENT_CHECK;
5086 }
5087
5088 void
5089 ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
5090 {
5091 clear_pending (EV_A_ (W)w);
5092 if (ecb_expect_false (!ev_is_active (w)))
5093 return;
5094
5095 EV_FREQUENT_CHECK;
5096
5097 {
5098 int active = ev_active (w);
5099
5100 asyncs [active - 1] = asyncs [--asynccnt];
5101 ev_active (asyncs [active - 1]) = active;
5102 }
5103
5104 ev_stop (EV_A_ (W)w);
5105
5106 EV_FREQUENT_CHECK;
5107 }
5108
5109 void
5110 ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
5111 {
5112 w->sent = 1;
5113 evpipe_write (EV_A_ &async_pending);
5114 }
5115 #endif
5116
5117 /*****************************************************************************/
5118
5119 struct ev_once
5120 {
5121 ev_io io;
5122 ev_timer to;
5123 void (*cb)(int revents, void *arg);
5124 void *arg;
5125 };
5126
5127 static void
5128 once_cb (EV_P_ struct ev_once *once, int revents)
5129 {
5130 void (*cb)(int revents, void *arg) = once->cb;
5131 void *arg = once->arg;
5132
5133 ev_io_stop (EV_A_ &once->io);
5134 ev_timer_stop (EV_A_ &once->to);
5135 ev_free (once);
5136
5137 cb (revents, arg);
5138 }
5139
5140 static void
5141 once_cb_io (EV_P_ ev_io *w, int revents)
5142 {
5143 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5144
5145 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
5146 }
5147
5148 static void
5149 once_cb_to (EV_P_ ev_timer *w, int revents)
5150 {
5151 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
5152
5153 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
5154 }
5155
5156 void
5157 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
5158 {
5159 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
5160
5161 once->cb = cb;
5162 once->arg = arg;
5163
5164 ev_init (&once->io, once_cb_io);
5165 if (fd >= 0)
5166 {
5167 ev_io_set (&once->io, fd, events);
5168 ev_io_start (EV_A_ &once->io);
5169 }
5170
5171 ev_init (&once->to, once_cb_to);
5172 if (timeout >= 0.)
5173 {
5174 ev_timer_set (&once->to, timeout, 0.);
5175 ev_timer_start (EV_A_ &once->to);
5176 }
5177 }
5178
5179 /*****************************************************************************/
5180
5181 #if EV_WALK_ENABLE
5182 ecb_cold
5183 void
5184 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5185 {
5186 int i, j;
5187 ev_watcher_list *wl, *wn;
5188
5189 if (types & (EV_IO | EV_EMBED))
5190 for (i = 0; i < anfdmax; ++i)
5191 for (wl = anfds [i].head; wl; )
5192 {
5193 wn = wl->next;
5194
5195 #if EV_EMBED_ENABLE
5196 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5197 {
5198 if (types & EV_EMBED)
5199 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5200 }
5201 else
5202 #endif
5203 #if EV_USE_INOTIFY
5204 if (ev_cb ((ev_io *)wl) == infy_cb)
5205 ;
5206 else
5207 #endif
5208 if ((ev_io *)wl != &pipe_w)
5209 if (types & EV_IO)
5210 cb (EV_A_ EV_IO, wl);
5211
5212 wl = wn;
5213 }
5214
5215 if (types & (EV_TIMER | EV_STAT))
5216 for (i = timercnt + HEAP0; i-- > HEAP0; )
5217 #if EV_STAT_ENABLE
5218 /*TODO: timer is not always active*/
5219 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5220 {
5221 if (types & EV_STAT)
5222 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5223 }
5224 else
5225 #endif
5226 if (types & EV_TIMER)
5227 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5228
5229 #if EV_PERIODIC_ENABLE
5230 if (types & EV_PERIODIC)
5231 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5232 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5233 #endif
5234
5235 #if EV_IDLE_ENABLE
5236 if (types & EV_IDLE)
5237 for (j = NUMPRI; j--; )
5238 for (i = idlecnt [j]; i--; )
5239 cb (EV_A_ EV_IDLE, idles [j][i]);
5240 #endif
5241
5242 #if EV_FORK_ENABLE
5243 if (types & EV_FORK)
5244 for (i = forkcnt; i--; )
5245 if (ev_cb (forks [i]) != embed_fork_cb)
5246 cb (EV_A_ EV_FORK, forks [i]);
5247 #endif
5248
5249 #if EV_ASYNC_ENABLE
5250 if (types & EV_ASYNC)
5251 for (i = asynccnt; i--; )
5252 cb (EV_A_ EV_ASYNC, asyncs [i]);
5253 #endif
5254
5255 #if EV_PREPARE_ENABLE
5256 if (types & EV_PREPARE)
5257 for (i = preparecnt; i--; )
5258 # if EV_EMBED_ENABLE
5259 if (ev_cb (prepares [i]) != embed_prepare_cb)
5260 # endif
5261 cb (EV_A_ EV_PREPARE, prepares [i]);
5262 #endif
5263
5264 #if EV_CHECK_ENABLE
5265 if (types & EV_CHECK)
5266 for (i = checkcnt; i--; )
5267 cb (EV_A_ EV_CHECK, checks [i]);
5268 #endif
5269
5270 #if EV_SIGNAL_ENABLE
5271 if (types & EV_SIGNAL)
5272 for (i = 0; i < EV_NSIG - 1; ++i)
5273 for (wl = signals [i].head; wl; )
5274 {
5275 wn = wl->next;
5276 cb (EV_A_ EV_SIGNAL, wl);
5277 wl = wn;
5278 }
5279 #endif
5280
5281 #if EV_CHILD_ENABLE
5282 if (types & EV_CHILD)
5283 for (i = (EV_PID_HASHSIZE); i--; )
5284 for (wl = childs [i]; wl; )
5285 {
5286 wn = wl->next;
5287 cb (EV_A_ EV_CHILD, wl);
5288 wl = wn;
5289 }
5290 #endif
5291 /* EV_STAT 0x00001000 /* stat data changed */
5292 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5293 }
5294 #endif
5295
5296 #if EV_MULTIPLICITY
5297 #include "ev_wrap.h"
5298 #endif
5299