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Comparing libev/ev.c (file contents):
Revision 1.69 by root, Tue Nov 6 00:10:04 2007 UTC vs.
Revision 1.534 by root, Thu Jul 30 00:59:36 2020 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2020 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 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
33 67
34# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 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
37# endif 82# endif
38 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
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 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
40# define EV_USE_SELECT 1 99# define EV_USE_SELECT 0
41# endif 100# endif
42 101
43# if HAVE_POLL && HAVE_POLL_H 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
44# define EV_USE_POLL 1 108# define EV_USE_POLL 0
45# endif 109# endif
46 110
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 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
48# define EV_USE_EPOLL 1 117# define EV_USE_EPOLL 0
49# endif 118# endif
50 119
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 120# if HAVE_LINUX_AIO_ABI_H
52# define EV_USE_KQUEUE 1 121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
53# endif 127# endif
54 128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
130# ifndef EV_USE_IOURING
131# define EV_USE_IOURING EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_IOURING
135# define EV_USE_IOURING 0
55#endif 136# endif
137
138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
139# ifndef EV_USE_KQUEUE
140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
141# endif
142# else
143# undef EV_USE_KQUEUE
144# define EV_USE_KQUEUE 0
145# endif
146
147# if HAVE_PORT_H && HAVE_PORT_CREATE
148# ifndef EV_USE_PORT
149# define EV_USE_PORT EV_FEATURE_BACKENDS
150# endif
151# else
152# undef EV_USE_PORT
153# define EV_USE_PORT 0
154# endif
56 155
57#include <math.h> 156# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
157# ifndef EV_USE_INOTIFY
158# define EV_USE_INOTIFY EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_INOTIFY
162# define EV_USE_INOTIFY 0
163# endif
164
165# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
166# ifndef EV_USE_SIGNALFD
167# define EV_USE_SIGNALFD EV_FEATURE_OS
168# endif
169# else
170# undef EV_USE_SIGNALFD
171# define EV_USE_SIGNALFD 0
172# endif
173
174# if HAVE_EVENTFD
175# ifndef EV_USE_EVENTFD
176# define EV_USE_EVENTFD EV_FEATURE_OS
177# endif
178# else
179# undef EV_USE_EVENTFD
180# define EV_USE_EVENTFD 0
181# endif
182
183# if HAVE_SYS_TIMERFD_H
184# ifndef EV_USE_TIMERFD
185# define EV_USE_TIMERFD EV_FEATURE_OS
186# endif
187# else
188# undef EV_USE_TIMERFD
189# define EV_USE_TIMERFD 0
190# endif
191
192#endif
193
194/* OS X, in its infinite idiocy, actually HARDCODES
195 * a limit of 1024 into their select. Where people have brains,
196 * OS X engineers apparently have a vacuum. Or maybe they were
197 * ordered to have a vacuum, or they do anything for money.
198 * This might help. Or not.
199 * Note that this must be defined early, as other include files
200 * will rely on this define as well.
201 */
202#define _DARWIN_UNLIMITED_SELECT 1
203
58#include <stdlib.h> 204#include <stdlib.h>
59#include <unistd.h> 205#include <string.h>
60#include <fcntl.h> 206#include <fcntl.h>
61#include <signal.h>
62#include <stddef.h> 207#include <stddef.h>
63 208
64#include <stdio.h> 209#include <stdio.h>
65 210
66#include <assert.h> 211#include <assert.h>
67#include <errno.h> 212#include <errno.h>
68#include <sys/types.h> 213#include <sys/types.h>
214#include <time.h>
215#include <limits.h>
216
217#include <signal.h>
218
219#ifdef EV_H
220# include EV_H
221#else
222# include "ev.h"
223#endif
224
225#if EV_NO_THREADS
226# undef EV_NO_SMP
227# define EV_NO_SMP 1
228# undef ECB_NO_THREADS
229# define ECB_NO_THREADS 1
230#endif
231#if EV_NO_SMP
232# undef EV_NO_SMP
233# define ECB_NO_SMP 1
234#endif
235
69#ifndef WIN32 236#ifndef _WIN32
237# include <sys/time.h>
70# include <sys/wait.h> 238# include <sys/wait.h>
239# include <unistd.h>
240#else
241# include <io.h>
242# define WIN32_LEAN_AND_MEAN
243# include <winsock2.h>
244# include <windows.h>
245# ifndef EV_SELECT_IS_WINSOCKET
246# define EV_SELECT_IS_WINSOCKET 1
71#endif 247# endif
72#include <sys/time.h> 248# undef EV_AVOID_STDIO
73#include <time.h> 249#endif
74 250
75/**/ 251/* this block tries to deduce configuration from header-defined symbols and defaults */
252
253/* try to deduce the maximum number of signals on this platform */
254#if defined EV_NSIG
255/* use what's provided */
256#elif defined NSIG
257# define EV_NSIG (NSIG)
258#elif defined _NSIG
259# define EV_NSIG (_NSIG)
260#elif defined SIGMAX
261# define EV_NSIG (SIGMAX+1)
262#elif defined SIG_MAX
263# define EV_NSIG (SIG_MAX+1)
264#elif defined _SIG_MAX
265# define EV_NSIG (_SIG_MAX+1)
266#elif defined MAXSIG
267# define EV_NSIG (MAXSIG+1)
268#elif defined MAX_SIG
269# define EV_NSIG (MAX_SIG+1)
270#elif defined SIGARRAYSIZE
271# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
272#elif defined _sys_nsig
273# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
274#else
275# define EV_NSIG (8 * sizeof (sigset_t) + 1)
276#endif
277
278#ifndef EV_USE_FLOOR
279# define EV_USE_FLOOR 0
280#endif
281
282#ifndef EV_USE_CLOCK_SYSCALL
283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
285# else
286# define EV_USE_CLOCK_SYSCALL 0
287# endif
288#endif
289
290#if !(_POSIX_TIMERS > 0)
291# ifndef EV_USE_MONOTONIC
292# define EV_USE_MONOTONIC 0
293# endif
294# ifndef EV_USE_REALTIME
295# define EV_USE_REALTIME 0
296# endif
297#endif
76 298
77#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
301# define EV_USE_MONOTONIC EV_FEATURE_OS
302# else
78# define EV_USE_MONOTONIC 1 303# define EV_USE_MONOTONIC 0
304# endif
305#endif
306
307#ifndef EV_USE_REALTIME
308# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
309#endif
310
311#ifndef EV_USE_NANOSLEEP
312# if _POSIX_C_SOURCE >= 199309L
313# define EV_USE_NANOSLEEP EV_FEATURE_OS
314# else
315# define EV_USE_NANOSLEEP 0
316# endif
79#endif 317#endif
80 318
81#ifndef EV_USE_SELECT 319#ifndef EV_USE_SELECT
82# define EV_USE_SELECT 1 320# define EV_USE_SELECT EV_FEATURE_BACKENDS
83#endif 321#endif
84 322
85#ifndef EV_USE_POLL 323#ifndef EV_USE_POLL
86# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 324# ifdef _WIN32
325# define EV_USE_POLL 0
326# else
327# define EV_USE_POLL EV_FEATURE_BACKENDS
328# endif
87#endif 329#endif
88 330
89#ifndef EV_USE_EPOLL 331#ifndef EV_USE_EPOLL
332# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
333# define EV_USE_EPOLL EV_FEATURE_BACKENDS
334# else
90# define EV_USE_EPOLL 0 335# define EV_USE_EPOLL 0
336# endif
91#endif 337#endif
92 338
93#ifndef EV_USE_KQUEUE 339#ifndef EV_USE_KQUEUE
94# define EV_USE_KQUEUE 0 340# define EV_USE_KQUEUE 0
95#endif 341#endif
96 342
343#ifndef EV_USE_PORT
344# define EV_USE_PORT 0
345#endif
346
97#ifndef EV_USE_WIN32 347#ifndef EV_USE_LINUXAIO
98# ifdef WIN32 348# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
99# define EV_USE_WIN32 1 349# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
100# else 350# else
101# define EV_USE_WIN32 0 351# define EV_USE_LINUXAIO 0
102# endif 352# endif
103#endif 353#endif
104 354
105#ifndef EV_USE_REALTIME 355#ifndef EV_USE_IOURING
356# if __linux /* later checks might disable again */
106# define EV_USE_REALTIME 1 357# define EV_USE_IOURING 1
358# else
359# define EV_USE_IOURING 0
107#endif 360# endif
361#endif
108 362
109/**/ 363#ifndef EV_USE_INOTIFY
364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
365# define EV_USE_INOTIFY EV_FEATURE_OS
366# else
367# define EV_USE_INOTIFY 0
368# endif
369#endif
370
371#ifndef EV_PID_HASHSIZE
372# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
373#endif
374
375#ifndef EV_INOTIFY_HASHSIZE
376# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
377#endif
378
379#ifndef EV_USE_EVENTFD
380# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
381# define EV_USE_EVENTFD EV_FEATURE_OS
382# else
383# define EV_USE_EVENTFD 0
384# endif
385#endif
386
387#ifndef EV_USE_SIGNALFD
388# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
389# define EV_USE_SIGNALFD EV_FEATURE_OS
390# else
391# define EV_USE_SIGNALFD 0
392# endif
393#endif
394
395#ifndef EV_USE_TIMERFD
396# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
397# define EV_USE_TIMERFD EV_FEATURE_OS
398# else
399# define EV_USE_TIMERFD 0
400# endif
401#endif
402
403#if 0 /* debugging */
404# define EV_VERIFY 3
405# define EV_USE_4HEAP 1
406# define EV_HEAP_CACHE_AT 1
407#endif
408
409#ifndef EV_VERIFY
410# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
411#endif
412
413#ifndef EV_USE_4HEAP
414# define EV_USE_4HEAP EV_FEATURE_DATA
415#endif
416
417#ifndef EV_HEAP_CACHE_AT
418# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
419#endif
420
421#ifdef __ANDROID__
422/* supposedly, android doesn't typedef fd_mask */
423# undef EV_USE_SELECT
424# define EV_USE_SELECT 0
425/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
426# undef EV_USE_CLOCK_SYSCALL
427# define EV_USE_CLOCK_SYSCALL 0
428#endif
429
430/* aix's poll.h seems to cause lots of trouble */
431#ifdef _AIX
432/* AIX has a completely broken poll.h header */
433# undef EV_USE_POLL
434# define EV_USE_POLL 0
435#endif
436
437/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
438/* which makes programs even slower. might work on other unices, too. */
439#if EV_USE_CLOCK_SYSCALL
440# include <sys/syscall.h>
441# ifdef SYS_clock_gettime
442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
443# undef EV_USE_MONOTONIC
444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
446# else
447# undef EV_USE_CLOCK_SYSCALL
448# define EV_USE_CLOCK_SYSCALL 0
449# endif
450#endif
451
452/* this block fixes any misconfiguration where we know we run into trouble otherwise */
110 453
111#ifndef CLOCK_MONOTONIC 454#ifndef CLOCK_MONOTONIC
112# undef EV_USE_MONOTONIC 455# undef EV_USE_MONOTONIC
113# define EV_USE_MONOTONIC 0 456# define EV_USE_MONOTONIC 0
114#endif 457#endif
… …
116#ifndef CLOCK_REALTIME 459#ifndef CLOCK_REALTIME
117# undef EV_USE_REALTIME 460# undef EV_USE_REALTIME
118# define EV_USE_REALTIME 0 461# define EV_USE_REALTIME 0
119#endif 462#endif
120 463
121/**/ 464#if !EV_STAT_ENABLE
465# undef EV_USE_INOTIFY
466# define EV_USE_INOTIFY 0
467#endif
122 468
123#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#if __linux && EV_USE_IOURING
124#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 470# include <linux/version.h>
125#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ 471# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
126/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 472# undef EV_USE_IOURING
473# define EV_USE_IOURING 0
474# endif
475#endif
127 476
128#include "ev.h" 477#if !EV_USE_NANOSLEEP
478/* hp-ux has it in sys/time.h, which we unconditionally include above */
479# if !defined _WIN32 && !defined __hpux
480# include <sys/select.h>
481# endif
482#endif
129 483
130#if __GNUC__ >= 3 484#if EV_USE_LINUXAIO
131# define expect(expr,value) __builtin_expect ((expr),(value)) 485# include <sys/syscall.h>
132# define inline inline 486# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
487# define EV_NEED_SYSCALL 1
488# else
489# undef EV_USE_LINUXAIO
490# define EV_USE_LINUXAIO 0
491# endif
492#endif
493
494#if EV_USE_IOURING
495# include <sys/syscall.h>
496# if !SYS_io_uring_register && __linux && !__alpha
497# define SYS_io_uring_setup 425
498# define SYS_io_uring_enter 426
499# define SYS_io_uring_register 427
500# endif
501# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
502# define EV_NEED_SYSCALL 1
503# else
504# undef EV_USE_IOURING
505# define EV_USE_IOURING 0
506# endif
507#endif
508
509#if EV_USE_INOTIFY
510# include <sys/statfs.h>
511# include <sys/inotify.h>
512/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
513# ifndef IN_DONT_FOLLOW
514# undef EV_USE_INOTIFY
515# define EV_USE_INOTIFY 0
516# endif
517#endif
518
519#if EV_USE_EVENTFD
520/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
521# include <stdint.h>
522# ifndef EFD_NONBLOCK
523# define EFD_NONBLOCK O_NONBLOCK
524# endif
525# ifndef EFD_CLOEXEC
526# ifdef O_CLOEXEC
527# define EFD_CLOEXEC O_CLOEXEC
528# else
529# define EFD_CLOEXEC 02000000
530# endif
531# endif
532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
533#endif
534
535#if EV_USE_SIGNALFD
536/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
537# include <stdint.h>
538# ifndef SFD_NONBLOCK
539# define SFD_NONBLOCK O_NONBLOCK
540# endif
541# ifndef SFD_CLOEXEC
542# ifdef O_CLOEXEC
543# define SFD_CLOEXEC O_CLOEXEC
544# else
545# define SFD_CLOEXEC 02000000
546# endif
547# endif
548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
549
550struct signalfd_siginfo
551{
552 uint32_t ssi_signo;
553 char pad[128 - sizeof (uint32_t)];
554};
555#endif
556
557/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
558#if EV_USE_TIMERFD
559# include <sys/timerfd.h>
560/* timerfd is only used for periodics */
561# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
562# undef EV_USE_TIMERFD
563# define EV_USE_TIMERFD 0
564# endif
565#endif
566
567/*****************************************************************************/
568
569#if EV_VERIFY >= 3
570# define EV_FREQUENT_CHECK ev_verify (EV_A)
133#else 571#else
134# define expect(expr,value) (expr) 572# define EV_FREQUENT_CHECK do { } while (0)
135# define inline static 573#endif
574
575/*
576 * This is used to work around floating point rounding problems.
577 * This value is good at least till the year 4000.
578 */
579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
581
582#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
583#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
584#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */
585
586/* find a portable timestamp that is "always" in the future but fits into time_t.
587 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
588 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
589#define EV_TSTAMP_HUGE \
590 (sizeof (time_t) >= 8 ? 10000000000000. \
591 : 0 < (time_t)4294967295 ? 4294967295. \
592 : 2147483647.) \
593
594#ifndef EV_TS_CONST
595# define EV_TS_CONST(nv) nv
596# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
597# define EV_TS_FROM_USEC(us) us * 1e-6
598# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
599# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
600# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
601# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
602#endif
603
604/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
605/* ECB.H BEGIN */
606/*
607 * libecb - http://software.schmorp.de/pkg/libecb
608 *
609 * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
610 * Copyright (©) 2011 Emanuele Giaquinta
611 * All rights reserved.
612 *
613 * Redistribution and use in source and binary forms, with or without modifica-
614 * tion, are permitted provided that the following conditions are met:
615 *
616 * 1. Redistributions of source code must retain the above copyright notice,
617 * this list of conditions and the following disclaimer.
618 *
619 * 2. Redistributions in binary form must reproduce the above copyright
620 * notice, this list of conditions and the following disclaimer in the
621 * documentation and/or other materials provided with the distribution.
622 *
623 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
624 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
625 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
626 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
627 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
628 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
629 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
630 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
631 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
632 * OF THE POSSIBILITY OF SUCH DAMAGE.
633 *
634 * Alternatively, the contents of this file may be used under the terms of
635 * the GNU General Public License ("GPL") version 2 or any later version,
636 * in which case the provisions of the GPL are applicable instead of
637 * the above. If you wish to allow the use of your version of this file
638 * only under the terms of the GPL and not to allow others to use your
639 * version of this file under the BSD license, indicate your decision
640 * by deleting the provisions above and replace them with the notice
641 * and other provisions required by the GPL. If you do not delete the
642 * provisions above, a recipient may use your version of this file under
643 * either the BSD or the GPL.
644 */
645
646#ifndef ECB_H
647#define ECB_H
648
649/* 16 bits major, 16 bits minor */
650#define ECB_VERSION 0x00010008
651
652#include <string.h> /* for memcpy */
653
654#if defined (_WIN32) && !defined (__MINGW32__)
655 typedef signed char int8_t;
656 typedef unsigned char uint8_t;
657 typedef signed char int_fast8_t;
658 typedef unsigned char uint_fast8_t;
659 typedef signed short int16_t;
660 typedef unsigned short uint16_t;
661 typedef signed int int_fast16_t;
662 typedef unsigned int uint_fast16_t;
663 typedef signed int int32_t;
664 typedef unsigned int uint32_t;
665 typedef signed int int_fast32_t;
666 typedef unsigned int uint_fast32_t;
667 #if __GNUC__
668 typedef signed long long int64_t;
669 typedef unsigned long long uint64_t;
670 #else /* _MSC_VER || __BORLANDC__ */
671 typedef signed __int64 int64_t;
672 typedef unsigned __int64 uint64_t;
136#endif 673 #endif
674 typedef int64_t int_fast64_t;
675 typedef uint64_t uint_fast64_t;
676 #ifdef _WIN64
677 #define ECB_PTRSIZE 8
678 typedef uint64_t uintptr_t;
679 typedef int64_t intptr_t;
680 #else
681 #define ECB_PTRSIZE 4
682 typedef uint32_t uintptr_t;
683 typedef int32_t intptr_t;
684 #endif
685#else
686 #include <inttypes.h>
687 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
688 #define ECB_PTRSIZE 8
689 #else
690 #define ECB_PTRSIZE 4
691 #endif
692#endif
137 693
138#define expect_false(expr) expect ((expr) != 0, 0) 694#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
139#define expect_true(expr) expect ((expr) != 0, 1) 695#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
140 696
141#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 697#ifndef ECB_OPTIMIZE_SIZE
142#define ABSPRI(w) ((w)->priority - EV_MINPRI) 698 #if __OPTIMIZE_SIZE__
699 #define ECB_OPTIMIZE_SIZE 1
700 #else
701 #define ECB_OPTIMIZE_SIZE 0
702 #endif
703#endif
143 704
144typedef struct ev_watcher *W; 705/* work around x32 idiocy by defining proper macros */
145typedef struct ev_watcher_list *WL; 706#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
146typedef struct ev_watcher_time *WT; 707 #if _ILP32
708 #define ECB_AMD64_X32 1
709 #else
710 #define ECB_AMD64 1
711 #endif
712#endif
147 713
148static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 714/* many compilers define _GNUC_ to some versions but then only implement
715 * what their idiot authors think are the "more important" extensions,
716 * causing enormous grief in return for some better fake benchmark numbers.
717 * or so.
718 * we try to detect these and simply assume they are not gcc - if they have
719 * an issue with that they should have done it right in the first place.
720 */
721#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
722 #define ECB_GCC_VERSION(major,minor) 0
723#else
724 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
725#endif
149 726
150#if WIN32 727#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
151/* note: the comment below could not be substantiated, but what would I care */ 728
152/* MSDN says this is required to handle SIGFPE */ 729#if __clang__ && defined __has_builtin
153volatile double SIGFPE_REQ = 0.0f; 730 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
731#else
732 #define ECB_CLANG_BUILTIN(x) 0
733#endif
734
735#if __clang__ && defined __has_extension
736 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
737#else
738 #define ECB_CLANG_EXTENSION(x) 0
739#endif
740
741#define ECB_CPP (__cplusplus+0)
742#define ECB_CPP11 (__cplusplus >= 201103L)
743#define ECB_CPP14 (__cplusplus >= 201402L)
744#define ECB_CPP17 (__cplusplus >= 201703L)
745
746#if ECB_CPP
747 #define ECB_C 0
748 #define ECB_STDC_VERSION 0
749#else
750 #define ECB_C 1
751 #define ECB_STDC_VERSION __STDC_VERSION__
752#endif
753
754#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
755#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
756#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
757
758#if ECB_CPP
759 #define ECB_EXTERN_C extern "C"
760 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
761 #define ECB_EXTERN_C_END }
762#else
763 #define ECB_EXTERN_C extern
764 #define ECB_EXTERN_C_BEG
765 #define ECB_EXTERN_C_END
154#endif 766#endif
155 767
156/*****************************************************************************/ 768/*****************************************************************************/
157 769
158static void (*syserr_cb)(void); 770/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
771/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
159 772
160void ev_set_syserr_cb (void (*cb)(void)) 773#if ECB_NO_THREADS
774 #define ECB_NO_SMP 1
775#endif
776
777#if ECB_NO_SMP
778 #define ECB_MEMORY_FENCE do { } while (0)
779#endif
780
781/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
782#if __xlC__ && ECB_CPP
783 #include <builtins.h>
784#endif
785
786#if 1400 <= _MSC_VER
787 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
788#endif
789
790#ifndef ECB_MEMORY_FENCE
791 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
792 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
793 #if __i386 || __i386__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
795 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
796 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
797 #elif ECB_GCC_AMD64
798 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
799 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
800 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
801 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
802 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
803 #elif defined __ARM_ARCH_2__ \
804 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
805 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
806 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
807 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
808 || defined __ARM_ARCH_5TEJ__
809 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
810 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
811 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
812 || defined __ARM_ARCH_6T2__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
814 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
815 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
817 #elif __aarch64__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
819 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
821 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
822 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
823 #elif defined __s390__ || defined __s390x__
824 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
825 #elif defined __mips__
826 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
827 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
828 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
829 #elif defined __alpha__
830 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
831 #elif defined __hppa__
832 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
833 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
834 #elif defined __ia64__
835 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
836 #elif defined __m68k__
837 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
838 #elif defined __m88k__
839 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
840 #elif defined __sh__
841 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
842 #endif
843 #endif
844#endif
845
846#ifndef ECB_MEMORY_FENCE
847 #if ECB_GCC_VERSION(4,7)
848 /* see comment below (stdatomic.h) about the C11 memory model. */
849 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
850 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
851 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
852 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
853
854 #elif ECB_CLANG_EXTENSION(c_atomic)
855 /* see comment below (stdatomic.h) about the C11 memory model. */
856 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
857 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
858 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
859 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
860
861 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
862 #define ECB_MEMORY_FENCE __sync_synchronize ()
863 #elif _MSC_VER >= 1500 /* VC++ 2008 */
864 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
865 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
866 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
867 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
868 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
869 #elif _MSC_VER >= 1400 /* VC++ 2005 */
870 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
871 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
872 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
873 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
874 #elif defined _WIN32
875 #include <WinNT.h>
876 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
877 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
878 #include <mbarrier.h>
879 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
880 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
881 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
882 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
883 #elif __xlC__
884 #define ECB_MEMORY_FENCE __sync ()
885 #endif
886#endif
887
888#ifndef ECB_MEMORY_FENCE
889 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
890 /* we assume that these memory fences work on all variables/all memory accesses, */
891 /* not just C11 atomics and atomic accesses */
892 #include <stdatomic.h>
893 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
894 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
895 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
896 #endif
897#endif
898
899#ifndef ECB_MEMORY_FENCE
900 #if !ECB_AVOID_PTHREADS
901 /*
902 * if you get undefined symbol references to pthread_mutex_lock,
903 * or failure to find pthread.h, then you should implement
904 * the ECB_MEMORY_FENCE operations for your cpu/compiler
905 * OR provide pthread.h and link against the posix thread library
906 * of your system.
907 */
908 #include <pthread.h>
909 #define ECB_NEEDS_PTHREADS 1
910 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
911
912 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
913 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
914 #endif
915#endif
916
917#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
918 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
919#endif
920
921#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
922 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
923#endif
924
925#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
926 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
927#endif
928
929/*****************************************************************************/
930
931#if ECB_CPP
932 #define ecb_inline static inline
933#elif ECB_GCC_VERSION(2,5)
934 #define ecb_inline static __inline__
935#elif ECB_C99
936 #define ecb_inline static inline
937#else
938 #define ecb_inline static
939#endif
940
941#if ECB_GCC_VERSION(3,3)
942 #define ecb_restrict __restrict__
943#elif ECB_C99
944 #define ecb_restrict restrict
945#else
946 #define ecb_restrict
947#endif
948
949typedef int ecb_bool;
950
951#define ECB_CONCAT_(a, b) a ## b
952#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
953#define ECB_STRINGIFY_(a) # a
954#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
955#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
956
957#define ecb_function_ ecb_inline
958
959#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
960 #define ecb_attribute(attrlist) __attribute__ (attrlist)
961#else
962 #define ecb_attribute(attrlist)
963#endif
964
965#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
966 #define ecb_is_constant(expr) __builtin_constant_p (expr)
967#else
968 /* possible C11 impl for integral types
969 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
970 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
971
972 #define ecb_is_constant(expr) 0
973#endif
974
975#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
976 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
977#else
978 #define ecb_expect(expr,value) (expr)
979#endif
980
981#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
982 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
983#else
984 #define ecb_prefetch(addr,rw,locality)
985#endif
986
987/* no emulation for ecb_decltype */
988#if ECB_CPP11
989 // older implementations might have problems with decltype(x)::type, work around it
990 template<class T> struct ecb_decltype_t { typedef T type; };
991 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
992#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
993 #define ecb_decltype(x) __typeof__ (x)
994#endif
995
996#if _MSC_VER >= 1300
997 #define ecb_deprecated __declspec (deprecated)
998#else
999 #define ecb_deprecated ecb_attribute ((__deprecated__))
1000#endif
1001
1002#if _MSC_VER >= 1500
1003 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
1004#elif ECB_GCC_VERSION(4,5)
1005 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
1006#else
1007 #define ecb_deprecated_message(msg) ecb_deprecated
1008#endif
1009
1010#if _MSC_VER >= 1400
1011 #define ecb_noinline __declspec (noinline)
1012#else
1013 #define ecb_noinline ecb_attribute ((__noinline__))
1014#endif
1015
1016#define ecb_unused ecb_attribute ((__unused__))
1017#define ecb_const ecb_attribute ((__const__))
1018#define ecb_pure ecb_attribute ((__pure__))
1019
1020#if ECB_C11 || __IBMC_NORETURN
1021 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1022 #define ecb_noreturn _Noreturn
1023#elif ECB_CPP11
1024 #define ecb_noreturn [[noreturn]]
1025#elif _MSC_VER >= 1200
1026 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1027 #define ecb_noreturn __declspec (noreturn)
1028#else
1029 #define ecb_noreturn ecb_attribute ((__noreturn__))
1030#endif
1031
1032#if ECB_GCC_VERSION(4,3)
1033 #define ecb_artificial ecb_attribute ((__artificial__))
1034 #define ecb_hot ecb_attribute ((__hot__))
1035 #define ecb_cold ecb_attribute ((__cold__))
1036#else
1037 #define ecb_artificial
1038 #define ecb_hot
1039 #define ecb_cold
1040#endif
1041
1042/* put around conditional expressions if you are very sure that the */
1043/* expression is mostly true or mostly false. note that these return */
1044/* booleans, not the expression. */
1045#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
1046#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1047/* for compatibility to the rest of the world */
1048#define ecb_likely(expr) ecb_expect_true (expr)
1049#define ecb_unlikely(expr) ecb_expect_false (expr)
1050
1051/* count trailing zero bits and count # of one bits */
1052#if ECB_GCC_VERSION(3,4) \
1053 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1054 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1055 && ECB_CLANG_BUILTIN(__builtin_popcount))
1056 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1057 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1058 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1059 #define ecb_ctz32(x) __builtin_ctz (x)
1060 #define ecb_ctz64(x) __builtin_ctzll (x)
1061 #define ecb_popcount32(x) __builtin_popcount (x)
1062 /* no popcountll */
1063#else
1064 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1065 ecb_function_ ecb_const int
1066 ecb_ctz32 (uint32_t x)
1067 {
1068#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1069 unsigned long r;
1070 _BitScanForward (&r, x);
1071 return (int)r;
1072#else
1073 int r = 0;
1074
1075 x &= ~x + 1; /* this isolates the lowest bit */
1076
1077#if ECB_branchless_on_i386
1078 r += !!(x & 0xaaaaaaaa) << 0;
1079 r += !!(x & 0xcccccccc) << 1;
1080 r += !!(x & 0xf0f0f0f0) << 2;
1081 r += !!(x & 0xff00ff00) << 3;
1082 r += !!(x & 0xffff0000) << 4;
1083#else
1084 if (x & 0xaaaaaaaa) r += 1;
1085 if (x & 0xcccccccc) r += 2;
1086 if (x & 0xf0f0f0f0) r += 4;
1087 if (x & 0xff00ff00) r += 8;
1088 if (x & 0xffff0000) r += 16;
1089#endif
1090
1091 return r;
1092#endif
1093 }
1094
1095 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1096 ecb_function_ ecb_const int
1097 ecb_ctz64 (uint64_t x)
1098 {
1099#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1100 unsigned long r;
1101 _BitScanForward64 (&r, x);
1102 return (int)r;
1103#else
1104 int shift = x & 0xffffffff ? 0 : 32;
1105 return ecb_ctz32 (x >> shift) + shift;
1106#endif
1107 }
1108
1109 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1110 ecb_function_ ecb_const int
1111 ecb_popcount32 (uint32_t x)
1112 {
1113 x -= (x >> 1) & 0x55555555;
1114 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1115 x = ((x >> 4) + x) & 0x0f0f0f0f;
1116 x *= 0x01010101;
1117
1118 return x >> 24;
1119 }
1120
1121 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1122 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1123 {
1124#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1125 unsigned long r;
1126 _BitScanReverse (&r, x);
1127 return (int)r;
1128#else
1129 int r = 0;
1130
1131 if (x >> 16) { x >>= 16; r += 16; }
1132 if (x >> 8) { x >>= 8; r += 8; }
1133 if (x >> 4) { x >>= 4; r += 4; }
1134 if (x >> 2) { x >>= 2; r += 2; }
1135 if (x >> 1) { r += 1; }
1136
1137 return r;
1138#endif
1139 }
1140
1141 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1142 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1143 {
1144#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1145 unsigned long r;
1146 _BitScanReverse64 (&r, x);
1147 return (int)r;
1148#else
1149 int r = 0;
1150
1151 if (x >> 32) { x >>= 32; r += 32; }
1152
1153 return r + ecb_ld32 (x);
1154#endif
1155 }
1156#endif
1157
1158ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1159ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1160ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1161ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1162
1163ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1164ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1165{
1166 return ( (x * 0x0802U & 0x22110U)
1167 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1168}
1169
1170ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1171ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1172{
1173 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1174 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1175 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1176 x = ( x >> 8 ) | ( x << 8);
1177
1178 return x;
1179}
1180
1181ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1182ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1183{
1184 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1185 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1186 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1187 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1188 x = ( x >> 16 ) | ( x << 16);
1189
1190 return x;
1191}
1192
1193/* popcount64 is only available on 64 bit cpus as gcc builtin */
1194/* so for this version we are lazy */
1195ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1196ecb_function_ ecb_const int
1197ecb_popcount64 (uint64_t x)
1198{
1199 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1200}
1201
1202ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1203ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1204ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1205ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1206ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1207ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1208ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1209ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1210
1211ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1212ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1213ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1214ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1215ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1216ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1217ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1218ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1219
1220#if ECB_CPP
1221
1222inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
1223inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
1224inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
1225inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
1226
1227inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
1228inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
1229inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
1230inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
1231
1232inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
1233inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
1234inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
1235inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
1236
1237inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
1238inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
1239inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
1240inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
1241
1242inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
1243inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
1244inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
1245
1246inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
1247inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
1248inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
1249inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
1250
1251inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
1252inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
1253inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
1254inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
1255
1256#endif
1257
1258#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1259 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1260 #define ecb_bswap16(x) __builtin_bswap16 (x)
1261 #else
1262 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1263 #endif
1264 #define ecb_bswap32(x) __builtin_bswap32 (x)
1265 #define ecb_bswap64(x) __builtin_bswap64 (x)
1266#elif _MSC_VER
1267 #include <stdlib.h>
1268 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1269 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1270 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1271#else
1272 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1273 ecb_function_ ecb_const uint16_t
1274 ecb_bswap16 (uint16_t x)
1275 {
1276 return ecb_rotl16 (x, 8);
1277 }
1278
1279 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1280 ecb_function_ ecb_const uint32_t
1281 ecb_bswap32 (uint32_t x)
1282 {
1283 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1284 }
1285
1286 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1287 ecb_function_ ecb_const uint64_t
1288 ecb_bswap64 (uint64_t x)
1289 {
1290 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1291 }
1292#endif
1293
1294#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1295 #define ecb_unreachable() __builtin_unreachable ()
1296#else
1297 /* this seems to work fine, but gcc always emits a warning for it :/ */
1298 ecb_inline ecb_noreturn void ecb_unreachable (void);
1299 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1300#endif
1301
1302/* try to tell the compiler that some condition is definitely true */
1303#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1304
1305ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1306ecb_inline ecb_const uint32_t
1307ecb_byteorder_helper (void)
1308{
1309 /* the union code still generates code under pressure in gcc, */
1310 /* but less than using pointers, and always seems to */
1311 /* successfully return a constant. */
1312 /* the reason why we have this horrible preprocessor mess */
1313 /* is to avoid it in all cases, at least on common architectures */
1314 /* or when using a recent enough gcc version (>= 4.6) */
1315#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1316 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1317 #define ECB_LITTLE_ENDIAN 1
1318 return 0x44332211;
1319#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1320 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1321 #define ECB_BIG_ENDIAN 1
1322 return 0x11223344;
1323#else
1324 union
1325 {
1326 uint8_t c[4];
1327 uint32_t u;
1328 } u = { 0x11, 0x22, 0x33, 0x44 };
1329 return u.u;
1330#endif
1331}
1332
1333ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1334ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1335ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1336ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1337
1338/*****************************************************************************/
1339/* unaligned load/store */
1340
1341ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1342ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1343ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1344
1345ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1346ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1347ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1348
1349ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1350ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1351ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1352
1353ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
1354ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
1355ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
1356
1357ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
1358ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
1359ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
1360
1361ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1362ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1363ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1364
1365ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1366ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1367ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1368
1369ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
1370ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
1371ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
1372
1373ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
1374ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
1375ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
1376
1377ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
1378ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
1379ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
1380
1381#if ECB_CPP
1382
1383inline uint8_t ecb_bswap (uint8_t v) { return v; }
1384inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
1385inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
1386inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
1387
1388template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1389template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1390template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
1391template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
1392template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
1393template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
1394template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
1395template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
1396
1397template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1398template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1399template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
1400template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
1401template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
1402template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
1403template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
1404template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
1405
1406#endif
1407
1408/*****************************************************************************/
1409
1410#if ECB_GCC_VERSION(3,0) || ECB_C99
1411 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1412#else
1413 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1414#endif
1415
1416#if ECB_CPP
1417 template<typename T>
1418 static inline T ecb_div_rd (T val, T div)
1419 {
1420 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1421 }
1422 template<typename T>
1423 static inline T ecb_div_ru (T val, T div)
1424 {
1425 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1426 }
1427#else
1428 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1429 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1430#endif
1431
1432#if ecb_cplusplus_does_not_suck
1433 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1434 template<typename T, int N>
1435 static inline int ecb_array_length (const T (&arr)[N])
1436 {
1437 return N;
1438 }
1439#else
1440 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1441#endif
1442
1443/*****************************************************************************/
1444
1445ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1446ecb_function_ ecb_const uint32_t
1447ecb_binary16_to_binary32 (uint32_t x)
1448{
1449 unsigned int s = (x & 0x8000) << (31 - 15);
1450 int e = (x >> 10) & 0x001f;
1451 unsigned int m = x & 0x03ff;
1452
1453 if (ecb_expect_false (e == 31))
1454 /* infinity or NaN */
1455 e = 255 - (127 - 15);
1456 else if (ecb_expect_false (!e))
1457 {
1458 if (ecb_expect_true (!m))
1459 /* zero, handled by code below by forcing e to 0 */
1460 e = 0 - (127 - 15);
1461 else
1462 {
1463 /* subnormal, renormalise */
1464 unsigned int s = 10 - ecb_ld32 (m);
1465
1466 m = (m << s) & 0x3ff; /* mask implicit bit */
1467 e -= s - 1;
1468 }
1469 }
1470
1471 /* e and m now are normalised, or zero, (or inf or nan) */
1472 e += 127 - 15;
1473
1474 return s | (e << 23) | (m << (23 - 10));
1475}
1476
1477ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1478ecb_function_ ecb_const uint16_t
1479ecb_binary32_to_binary16 (uint32_t x)
1480{
1481 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1482 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1483 unsigned int m = x & 0x007fffff;
1484
1485 x &= 0x7fffffff;
1486
1487 /* if it's within range of binary16 normals, use fast path */
1488 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1489 {
1490 /* mantissa round-to-even */
1491 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1492
1493 /* handle overflow */
1494 if (ecb_expect_false (m >= 0x00800000))
1495 {
1496 m >>= 1;
1497 e += 1;
1498 }
1499
1500 return s | (e << 10) | (m >> (23 - 10));
1501 }
1502
1503 /* handle large numbers and infinity */
1504 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1505 return s | 0x7c00;
1506
1507 /* handle zero, subnormals and small numbers */
1508 if (ecb_expect_true (x < 0x38800000))
1509 {
1510 /* zero */
1511 if (ecb_expect_true (!x))
1512 return s;
1513
1514 /* handle subnormals */
1515
1516 /* too small, will be zero */
1517 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1518 return s;
1519
1520 m |= 0x00800000; /* make implicit bit explicit */
1521
1522 /* very tricky - we need to round to the nearest e (+10) bit value */
1523 {
1524 unsigned int bits = 14 - e;
1525 unsigned int half = (1 << (bits - 1)) - 1;
1526 unsigned int even = (m >> bits) & 1;
1527
1528 /* if this overflows, we will end up with a normalised number */
1529 m = (m + half + even) >> bits;
1530 }
1531
1532 return s | m;
1533 }
1534
1535 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1536 m >>= 13;
1537
1538 return s | 0x7c00 | m | !m;
1539}
1540
1541/*******************************************************************************/
1542/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1543
1544/* basically, everything uses "ieee pure-endian" floating point numbers */
1545/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1546#if 0 \
1547 || __i386 || __i386__ \
1548 || ECB_GCC_AMD64 \
1549 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1550 || defined __s390__ || defined __s390x__ \
1551 || defined __mips__ \
1552 || defined __alpha__ \
1553 || defined __hppa__ \
1554 || defined __ia64__ \
1555 || defined __m68k__ \
1556 || defined __m88k__ \
1557 || defined __sh__ \
1558 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1559 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1560 || defined __aarch64__
1561 #define ECB_STDFP 1
1562#else
1563 #define ECB_STDFP 0
1564#endif
1565
1566#ifndef ECB_NO_LIBM
1567
1568 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1569
1570 /* only the oldest of old doesn't have this one. solaris. */
1571 #ifdef INFINITY
1572 #define ECB_INFINITY INFINITY
1573 #else
1574 #define ECB_INFINITY HUGE_VAL
1575 #endif
1576
1577 #ifdef NAN
1578 #define ECB_NAN NAN
1579 #else
1580 #define ECB_NAN ECB_INFINITY
1581 #endif
1582
1583 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1584 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1585 #define ecb_frexpf(x,e) frexpf ((x), (e))
1586 #else
1587 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1588 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1589 #endif
1590
1591 /* convert a float to ieee single/binary32 */
1592 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1593 ecb_function_ ecb_const uint32_t
1594 ecb_float_to_binary32 (float x)
1595 {
1596 uint32_t r;
1597
1598 #if ECB_STDFP
1599 memcpy (&r, &x, 4);
1600 #else
1601 /* slow emulation, works for anything but -0 */
1602 uint32_t m;
1603 int e;
1604
1605 if (x == 0e0f ) return 0x00000000U;
1606 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1607 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1608 if (x != x ) return 0x7fbfffffU;
1609
1610 m = ecb_frexpf (x, &e) * 0x1000000U;
1611
1612 r = m & 0x80000000U;
1613
1614 if (r)
1615 m = -m;
1616
1617 if (e <= -126)
1618 {
1619 m &= 0xffffffU;
1620 m >>= (-125 - e);
1621 e = -126;
1622 }
1623
1624 r |= (e + 126) << 23;
1625 r |= m & 0x7fffffU;
1626 #endif
1627
1628 return r;
1629 }
1630
1631 /* converts an ieee single/binary32 to a float */
1632 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1633 ecb_function_ ecb_const float
1634 ecb_binary32_to_float (uint32_t x)
1635 {
1636 float r;
1637
1638 #if ECB_STDFP
1639 memcpy (&r, &x, 4);
1640 #else
1641 /* emulation, only works for normals and subnormals and +0 */
1642 int neg = x >> 31;
1643 int e = (x >> 23) & 0xffU;
1644
1645 x &= 0x7fffffU;
1646
1647 if (e)
1648 x |= 0x800000U;
1649 else
1650 e = 1;
1651
1652 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1653 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1654
1655 r = neg ? -r : r;
1656 #endif
1657
1658 return r;
1659 }
1660
1661 /* convert a double to ieee double/binary64 */
1662 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1663 ecb_function_ ecb_const uint64_t
1664 ecb_double_to_binary64 (double x)
1665 {
1666 uint64_t r;
1667
1668 #if ECB_STDFP
1669 memcpy (&r, &x, 8);
1670 #else
1671 /* slow emulation, works for anything but -0 */
1672 uint64_t m;
1673 int e;
1674
1675 if (x == 0e0 ) return 0x0000000000000000U;
1676 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1677 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1678 if (x != x ) return 0X7ff7ffffffffffffU;
1679
1680 m = frexp (x, &e) * 0x20000000000000U;
1681
1682 r = m & 0x8000000000000000;;
1683
1684 if (r)
1685 m = -m;
1686
1687 if (e <= -1022)
1688 {
1689 m &= 0x1fffffffffffffU;
1690 m >>= (-1021 - e);
1691 e = -1022;
1692 }
1693
1694 r |= ((uint64_t)(e + 1022)) << 52;
1695 r |= m & 0xfffffffffffffU;
1696 #endif
1697
1698 return r;
1699 }
1700
1701 /* converts an ieee double/binary64 to a double */
1702 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1703 ecb_function_ ecb_const double
1704 ecb_binary64_to_double (uint64_t x)
1705 {
1706 double r;
1707
1708 #if ECB_STDFP
1709 memcpy (&r, &x, 8);
1710 #else
1711 /* emulation, only works for normals and subnormals and +0 */
1712 int neg = x >> 63;
1713 int e = (x >> 52) & 0x7ffU;
1714
1715 x &= 0xfffffffffffffU;
1716
1717 if (e)
1718 x |= 0x10000000000000U;
1719 else
1720 e = 1;
1721
1722 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1723 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1724
1725 r = neg ? -r : r;
1726 #endif
1727
1728 return r;
1729 }
1730
1731 /* convert a float to ieee half/binary16 */
1732 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1733 ecb_function_ ecb_const uint16_t
1734 ecb_float_to_binary16 (float x)
1735 {
1736 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1737 }
1738
1739 /* convert an ieee half/binary16 to float */
1740 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1741 ecb_function_ ecb_const float
1742 ecb_binary16_to_float (uint16_t x)
1743 {
1744 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1745 }
1746
1747#endif
1748
1749#endif
1750
1751/* ECB.H END */
1752
1753#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1754/* if your architecture doesn't need memory fences, e.g. because it is
1755 * single-cpu/core, or if you use libev in a project that doesn't use libev
1756 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1757 * libev, in which cases the memory fences become nops.
1758 * alternatively, you can remove this #error and link against libpthread,
1759 * which will then provide the memory fences.
1760 */
1761# error "memory fences not defined for your architecture, please report"
1762#endif
1763
1764#ifndef ECB_MEMORY_FENCE
1765# define ECB_MEMORY_FENCE do { } while (0)
1766# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1767# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1768#endif
1769
1770#define inline_size ecb_inline
1771
1772#if EV_FEATURE_CODE
1773# define inline_speed ecb_inline
1774#else
1775# define inline_speed ecb_noinline static
1776#endif
1777
1778/*****************************************************************************/
1779/* raw syscall wrappers */
1780
1781#if EV_NEED_SYSCALL
1782
1783#include <sys/syscall.h>
1784
1785/*
1786 * define some syscall wrappers for common architectures
1787 * this is mostly for nice looks during debugging, not performance.
1788 * our syscalls return < 0, not == -1, on error. which is good
1789 * enough for linux aio.
1790 * TODO: arm is also common nowadays, maybe even mips and x86
1791 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1792 */
1793#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1794 /* the costly errno access probably kills this for size optimisation */
1795
1796 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1797 ({ \
1798 long res; \
1799 register unsigned long r6 __asm__ ("r9" ); \
1800 register unsigned long r5 __asm__ ("r8" ); \
1801 register unsigned long r4 __asm__ ("r10"); \
1802 register unsigned long r3 __asm__ ("rdx"); \
1803 register unsigned long r2 __asm__ ("rsi"); \
1804 register unsigned long r1 __asm__ ("rdi"); \
1805 if (narg >= 6) r6 = (unsigned long)(arg6); \
1806 if (narg >= 5) r5 = (unsigned long)(arg5); \
1807 if (narg >= 4) r4 = (unsigned long)(arg4); \
1808 if (narg >= 3) r3 = (unsigned long)(arg3); \
1809 if (narg >= 2) r2 = (unsigned long)(arg2); \
1810 if (narg >= 1) r1 = (unsigned long)(arg1); \
1811 __asm__ __volatile__ ( \
1812 "syscall\n\t" \
1813 : "=a" (res) \
1814 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1815 : "cc", "r11", "cx", "memory"); \
1816 errno = -res; \
1817 res; \
1818 })
1819
1820#endif
1821
1822#ifdef ev_syscall
1823 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1824 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1825 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1826 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1827 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1828 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1829 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1830#else
1831 #define ev_syscall0(nr) syscall (nr)
1832 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1833 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1834 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1835 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1836 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1837 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1838#endif
1839
1840#endif
1841
1842/*****************************************************************************/
1843
1844#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1845
1846#if EV_MINPRI == EV_MAXPRI
1847# define ABSPRI(w) (((W)w), 0)
1848#else
1849# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1850#endif
1851
1852#define EMPTY /* required for microsofts broken pseudo-c compiler */
1853
1854typedef ev_watcher *W;
1855typedef ev_watcher_list *WL;
1856typedef ev_watcher_time *WT;
1857
1858#define ev_active(w) ((W)(w))->active
1859#define ev_at(w) ((WT)(w))->at
1860
1861#if EV_USE_REALTIME
1862/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1863/* giving it a reasonably high chance of working on typical architectures */
1864static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1865#endif
1866
1867#if EV_USE_MONOTONIC
1868static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1869#endif
1870
1871#ifndef EV_FD_TO_WIN32_HANDLE
1872# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1873#endif
1874#ifndef EV_WIN32_HANDLE_TO_FD
1875# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1876#endif
1877#ifndef EV_WIN32_CLOSE_FD
1878# define EV_WIN32_CLOSE_FD(fd) close (fd)
1879#endif
1880
1881#ifdef _WIN32
1882# include "ev_win32.c"
1883#endif
1884
1885/*****************************************************************************/
1886
1887#if EV_USE_LINUXAIO
1888# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1889#endif
1890
1891/* define a suitable floor function (only used by periodics atm) */
1892
1893#if EV_USE_FLOOR
1894# include <math.h>
1895# define ev_floor(v) floor (v)
1896#else
1897
1898#include <float.h>
1899
1900/* a floor() replacement function, should be independent of ev_tstamp type */
1901ecb_noinline
1902static ev_tstamp
1903ev_floor (ev_tstamp v)
1904{
1905 /* the choice of shift factor is not terribly important */
1906#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1907 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1908#else
1909 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1910#endif
1911
1912 /* special treatment for negative arguments */
1913 if (ecb_expect_false (v < 0.))
1914 {
1915 ev_tstamp f = -ev_floor (-v);
1916
1917 return f - (f == v ? 0 : 1);
1918 }
1919
1920 /* argument too large for an unsigned long? then reduce it */
1921 if (ecb_expect_false (v >= shift))
1922 {
1923 ev_tstamp f;
1924
1925 if (v == v - 1.)
1926 return v; /* very large numbers are assumed to be integer */
1927
1928 f = shift * ev_floor (v * (1. / shift));
1929 return f + ev_floor (v - f);
1930 }
1931
1932 /* fits into an unsigned long */
1933 return (unsigned long)v;
1934}
1935
1936#endif
1937
1938/*****************************************************************************/
1939
1940#ifdef __linux
1941# include <sys/utsname.h>
1942#endif
1943
1944ecb_noinline ecb_cold
1945static unsigned int
1946ev_linux_version (void)
1947{
1948#ifdef __linux
1949 unsigned int v = 0;
1950 struct utsname buf;
1951 int i;
1952 char *p = buf.release;
1953
1954 if (uname (&buf))
1955 return 0;
1956
1957 for (i = 3+1; --i; )
1958 {
1959 unsigned int c = 0;
1960
1961 for (;;)
1962 {
1963 if (*p >= '0' && *p <= '9')
1964 c = c * 10 + *p++ - '0';
1965 else
1966 {
1967 p += *p == '.';
1968 break;
1969 }
1970 }
1971
1972 v = (v << 8) | c;
1973 }
1974
1975 return v;
1976#else
1977 return 0;
1978#endif
1979}
1980
1981/*****************************************************************************/
1982
1983#if EV_AVOID_STDIO
1984ecb_noinline ecb_cold
1985static void
1986ev_printerr (const char *msg)
1987{
1988 write (STDERR_FILENO, msg, strlen (msg));
1989}
1990#endif
1991
1992static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
1993
1994ecb_cold
1995void
1996ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
161{ 1997{
162 syserr_cb = cb; 1998 syserr_cb = cb;
163} 1999}
164 2000
2001ecb_noinline ecb_cold
165static void 2002static void
166syserr (void) 2003ev_syserr (const char *msg)
167{ 2004{
2005 if (!msg)
2006 msg = "(libev) system error";
2007
168 if (syserr_cb) 2008 if (syserr_cb)
169 syserr_cb (); 2009 syserr_cb (msg);
170 else 2010 else
171 { 2011 {
2012#if EV_AVOID_STDIO
2013 ev_printerr (msg);
2014 ev_printerr (": ");
2015 ev_printerr (strerror (errno));
2016 ev_printerr ("\n");
2017#else
172 perror ("libev"); 2018 perror (msg);
2019#endif
173 abort (); 2020 abort ();
174 } 2021 }
175} 2022}
176 2023
177static void *(*alloc)(void *ptr, long size); 2024static void *
2025ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
2026{
2027 /* some systems, notably openbsd and darwin, fail to properly
2028 * implement realloc (x, 0) (as required by both ansi c-89 and
2029 * the single unix specification, so work around them here.
2030 * recently, also (at least) fedora and debian started breaking it,
2031 * despite documenting it otherwise.
2032 */
178 2033
2034 if (size)
2035 return realloc (ptr, size);
2036
2037 free (ptr);
2038 return 0;
2039}
2040
2041static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
2042
2043ecb_cold
2044void
179void ev_set_allocator (void *(*cb)(void *ptr, long size)) 2045ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
180{ 2046{
181 alloc = cb; 2047 alloc = cb;
182} 2048}
183 2049
184static void * 2050inline_speed void *
185ev_realloc (void *ptr, long size) 2051ev_realloc (void *ptr, long size)
186{ 2052{
187 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 2053 ptr = alloc (ptr, size);
188 2054
189 if (!ptr && size) 2055 if (!ptr && size)
190 { 2056 {
2057#if EV_AVOID_STDIO
2058 ev_printerr ("(libev) memory allocation failed, aborting.\n");
2059#else
191 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 2060 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
2061#endif
192 abort (); 2062 abort ();
193 } 2063 }
194 2064
195 return ptr; 2065 return ptr;
196} 2066}
… …
198#define ev_malloc(size) ev_realloc (0, (size)) 2068#define ev_malloc(size) ev_realloc (0, (size))
199#define ev_free(ptr) ev_realloc ((ptr), 0) 2069#define ev_free(ptr) ev_realloc ((ptr), 0)
200 2070
201/*****************************************************************************/ 2071/*****************************************************************************/
202 2072
2073/* set in reify when reification needed */
2074#define EV_ANFD_REIFY 1
2075
2076/* file descriptor info structure */
203typedef struct 2077typedef struct
204{ 2078{
205 WL head; 2079 WL head;
206 unsigned char events; 2080 unsigned char events; /* the events watched for */
207 unsigned char reify; 2081 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
2082 unsigned char emask; /* some backends store the actual kernel mask in here */
2083 unsigned char eflags; /* flags field for use by backends */
2084#if EV_USE_EPOLL
2085 unsigned int egen; /* generation counter to counter epoll bugs */
2086#endif
2087#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2088 SOCKET handle;
2089#endif
2090#if EV_USE_IOCP
2091 OVERLAPPED or, ow;
2092#endif
208} ANFD; 2093} ANFD;
209 2094
2095/* stores the pending event set for a given watcher */
210typedef struct 2096typedef struct
211{ 2097{
212 W w; 2098 W w;
213 int events; 2099 int events; /* the pending event set for the given watcher */
214} ANPENDING; 2100} ANPENDING;
215 2101
2102#if EV_USE_INOTIFY
2103/* hash table entry per inotify-id */
2104typedef struct
2105{
2106 WL head;
2107} ANFS;
2108#endif
2109
2110/* Heap Entry */
2111#if EV_HEAP_CACHE_AT
2112 /* a heap element */
2113 typedef struct {
2114 ev_tstamp at;
2115 WT w;
2116 } ANHE;
2117
2118 #define ANHE_w(he) (he).w /* access watcher, read-write */
2119 #define ANHE_at(he) (he).at /* access cached at, read-only */
2120 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
2121#else
2122 /* a heap element */
2123 typedef WT ANHE;
2124
2125 #define ANHE_w(he) (he)
2126 #define ANHE_at(he) (he)->at
2127 #define ANHE_at_cache(he)
2128#endif
2129
216#if EV_MULTIPLICITY 2130#if EV_MULTIPLICITY
217 2131
218struct ev_loop 2132 struct ev_loop
219{ 2133 {
2134 ev_tstamp ev_rt_now;
2135 #define ev_rt_now ((loop)->ev_rt_now)
220# define VAR(name,decl) decl; 2136 #define VAR(name,decl) decl;
221# include "ev_vars.h" 2137 #include "ev_vars.h"
222};
223# undef VAR 2138 #undef VAR
2139 };
224# include "ev_wrap.h" 2140 #include "ev_wrap.h"
2141
2142 static struct ev_loop default_loop_struct;
2143 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
225 2144
226#else 2145#else
227 2146
2147 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
228# define VAR(name,decl) static decl; 2148 #define VAR(name,decl) static decl;
229# include "ev_vars.h" 2149 #include "ev_vars.h"
230# undef VAR 2150 #undef VAR
231 2151
2152 static int ev_default_loop_ptr;
2153
232#endif 2154#endif
2155
2156#if EV_FEATURE_API
2157# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
2158# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
2159# define EV_INVOKE_PENDING invoke_cb (EV_A)
2160#else
2161# define EV_RELEASE_CB (void)0
2162# define EV_ACQUIRE_CB (void)0
2163# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
2164#endif
2165
2166#define EVBREAK_RECURSE 0x80
233 2167
234/*****************************************************************************/ 2168/*****************************************************************************/
235 2169
236inline ev_tstamp 2170#ifndef EV_HAVE_EV_TIME
237ev_time (void) 2171ev_tstamp
2172ev_time (void) EV_NOEXCEPT
238{ 2173{
239#if EV_USE_REALTIME 2174#if EV_USE_REALTIME
2175 if (ecb_expect_true (have_realtime))
2176 {
240 struct timespec ts; 2177 struct timespec ts;
241 clock_gettime (CLOCK_REALTIME, &ts); 2178 clock_gettime (CLOCK_REALTIME, &ts);
242 return ts.tv_sec + ts.tv_nsec * 1e-9; 2179 return EV_TS_GET (ts);
243#else 2180 }
2181#endif
2182
2183 {
244 struct timeval tv; 2184 struct timeval tv;
245 gettimeofday (&tv, 0); 2185 gettimeofday (&tv, 0);
246 return tv.tv_sec + tv.tv_usec * 1e-6; 2186 return EV_TV_GET (tv);
247#endif 2187 }
248} 2188}
2189#endif
249 2190
250inline ev_tstamp 2191inline_size ev_tstamp
251get_clock (void) 2192get_clock (void)
252{ 2193{
253#if EV_USE_MONOTONIC 2194#if EV_USE_MONOTONIC
254 if (expect_true (have_monotonic)) 2195 if (ecb_expect_true (have_monotonic))
255 { 2196 {
256 struct timespec ts; 2197 struct timespec ts;
257 clock_gettime (CLOCK_MONOTONIC, &ts); 2198 clock_gettime (CLOCK_MONOTONIC, &ts);
258 return ts.tv_sec + ts.tv_nsec * 1e-9; 2199 return EV_TS_GET (ts);
259 } 2200 }
260#endif 2201#endif
261 2202
262 return ev_time (); 2203 return ev_time ();
263} 2204}
264 2205
2206#if EV_MULTIPLICITY
265ev_tstamp 2207ev_tstamp
266ev_now (EV_P) 2208ev_now (EV_P) EV_NOEXCEPT
267{ 2209{
268 return rt_now; 2210 return ev_rt_now;
269} 2211}
2212#endif
270 2213
271#define array_roundsize(base,n) ((n) | 4 & ~3) 2214void
2215ev_sleep (ev_tstamp delay) EV_NOEXCEPT
2216{
2217 if (delay > EV_TS_CONST (0.))
2218 {
2219#if EV_USE_NANOSLEEP
2220 struct timespec ts;
272 2221
2222 EV_TS_SET (ts, delay);
2223 nanosleep (&ts, 0);
2224#elif defined _WIN32
2225 /* maybe this should round up, as ms is very low resolution */
2226 /* compared to select (µs) or nanosleep (ns) */
2227 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
2228#else
2229 struct timeval tv;
2230
2231 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
2232 /* something not guaranteed by newer posix versions, but guaranteed */
2233 /* by older ones */
2234 EV_TV_SET (tv, delay);
2235 select (0, 0, 0, 0, &tv);
2236#endif
2237 }
2238}
2239
2240/*****************************************************************************/
2241
2242#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
2243
2244/* find a suitable new size for the given array, */
2245/* hopefully by rounding to a nice-to-malloc size */
2246inline_size int
2247array_nextsize (int elem, int cur, int cnt)
2248{
2249 int ncur = cur + 1;
2250
2251 do
2252 ncur <<= 1;
2253 while (cnt > ncur);
2254
2255 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
2256 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
2257 {
2258 ncur *= elem;
2259 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
2260 ncur = ncur - sizeof (void *) * 4;
2261 ncur /= elem;
2262 }
2263
2264 return ncur;
2265}
2266
2267ecb_noinline ecb_cold
2268static void *
2269array_realloc (int elem, void *base, int *cur, int cnt)
2270{
2271 *cur = array_nextsize (elem, *cur, cnt);
2272 return ev_realloc (base, elem * *cur);
2273}
2274
2275#define array_needsize_noinit(base,offset,count)
2276
2277#define array_needsize_zerofill(base,offset,count) \
2278 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
2279
273#define array_needsize(base,cur,cnt,init) \ 2280#define array_needsize(type,base,cur,cnt,init) \
274 if (expect_false ((cnt) > cur)) \ 2281 if (ecb_expect_false ((cnt) > (cur))) \
275 { \ 2282 { \
276 int newcnt = cur; \ 2283 ecb_unused int ocur_ = (cur); \
277 do \ 2284 (base) = (type *)array_realloc \
278 { \ 2285 (sizeof (type), (base), &(cur), (cnt)); \
279 newcnt = array_roundsize (base, newcnt << 1); \ 2286 init ((base), ocur_, ((cur) - ocur_)); \
280 } \
281 while ((cnt) > newcnt); \
282 \
283 base = ev_realloc (base, sizeof (*base) * (newcnt)); \
284 init (base + cur, newcnt - cur); \
285 cur = newcnt; \
286 } 2287 }
287 2288
2289#if 0
288#define array_slim(stem) \ 2290#define array_slim(type,stem) \
289 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
290 { \ 2292 { \
291 stem ## max = array_roundsize (stem ## cnt >> 1); \ 2293 stem ## max = array_roundsize (stem ## cnt >> 1); \
292 base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ 2294 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
293 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 2295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
294 } 2296 }
2297#endif
295 2298
296#define array_free(stem, idx) \ 2299#define array_free(stem, idx) \
297 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 2300 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
298 2301
299/*****************************************************************************/ 2302/*****************************************************************************/
300 2303
2304/* dummy callback for pending events */
2305ecb_noinline
301static void 2306static void
302anfds_init (ANFD *base, int count) 2307pendingcb (EV_P_ ev_prepare *w, int revents)
303{ 2308{
304 while (count--) 2309}
305 {
306 base->head = 0;
307 base->events = EV_NONE;
308 base->reify = 0;
309 2310
310 ++base; 2311ecb_noinline
2312void
2313ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
2314{
2315 W w_ = (W)w;
2316 int pri = ABSPRI (w_);
2317
2318 if (ecb_expect_false (w_->pending))
2319 pendings [pri][w_->pending - 1].events |= revents;
2320 else
311 } 2321 {
312} 2322 w_->pending = ++pendingcnt [pri];
313 2323 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
314static void 2324 pendings [pri][w_->pending - 1].w = w_;
315event (EV_P_ W w, int events)
316{
317 if (w->pending)
318 {
319 pendings [ABSPRI (w)][w->pending - 1].events |= events; 2325 pendings [pri][w_->pending - 1].events = revents;
320 return;
321 } 2326 }
322 2327
323 w->pending = ++pendingcnt [ABSPRI (w)]; 2328 pendingpri = NUMPRI - 1;
324 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
325 pendings [ABSPRI (w)][w->pending - 1].w = w;
326 pendings [ABSPRI (w)][w->pending - 1].events = events;
327} 2329}
328 2330
329static void 2331inline_speed void
2332feed_reverse (EV_P_ W w)
2333{
2334 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
2335 rfeeds [rfeedcnt++] = w;
2336}
2337
2338inline_size void
2339feed_reverse_done (EV_P_ int revents)
2340{
2341 do
2342 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2343 while (rfeedcnt);
2344}
2345
2346inline_speed void
330queue_events (EV_P_ W *events, int eventcnt, int type) 2347queue_events (EV_P_ W *events, int eventcnt, int type)
331{ 2348{
332 int i; 2349 int i;
333 2350
334 for (i = 0; i < eventcnt; ++i) 2351 for (i = 0; i < eventcnt; ++i)
335 event (EV_A_ events [i], type); 2352 ev_feed_event (EV_A_ events [i], type);
336} 2353}
337 2354
338static void 2355/*****************************************************************************/
2356
2357inline_speed void
339fd_event (EV_P_ int fd, int events) 2358fd_event_nocheck (EV_P_ int fd, int revents)
340{ 2359{
341 ANFD *anfd = anfds + fd; 2360 ANFD *anfd = anfds + fd;
342 struct ev_io *w; 2361 ev_io *w;
343 2362
344 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 2363 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
345 { 2364 {
346 int ev = w->events & events; 2365 int ev = w->events & revents;
347 2366
348 if (ev) 2367 if (ev)
349 event (EV_A_ (W)w, ev); 2368 ev_feed_event (EV_A_ (W)w, ev);
350 } 2369 }
351} 2370}
352 2371
353/*****************************************************************************/ 2372/* do not submit kernel events for fds that have reify set */
2373/* because that means they changed while we were polling for new events */
2374inline_speed void
2375fd_event (EV_P_ int fd, int revents)
2376{
2377 ANFD *anfd = anfds + fd;
354 2378
355static void 2379 if (ecb_expect_true (!anfd->reify))
2380 fd_event_nocheck (EV_A_ fd, revents);
2381}
2382
2383void
2384ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
2385{
2386 if (fd >= 0 && fd < anfdmax)
2387 fd_event_nocheck (EV_A_ fd, revents);
2388}
2389
2390/* make sure the external fd watch events are in-sync */
2391/* with the kernel/libev internal state */
2392inline_size void
356fd_reify (EV_P) 2393fd_reify (EV_P)
357{ 2394{
358 int i; 2395 int i;
359 2396
2397 /* most backends do not modify the fdchanges list in backend_modfiy.
2398 * except io_uring, which has fixed-size buffers which might force us
2399 * to handle events in backend_modify, causing fdchanges to be amended,
2400 * which could result in an endless loop.
2401 * to avoid this, we do not dynamically handle fds that were added
2402 * during fd_reify. that means that for those backends, fdchangecnt
2403 * might be non-zero during poll, which must cause them to not block.
2404 * to not put too much of a burden on other backends, this detail
2405 * needs to be handled in the backend.
2406 */
2407 int changecnt = fdchangecnt;
2408
2409#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
360 for (i = 0; i < fdchangecnt; ++i) 2410 for (i = 0; i < changecnt; ++i)
361 { 2411 {
362 int fd = fdchanges [i]; 2412 int fd = fdchanges [i];
363 ANFD *anfd = anfds + fd; 2413 ANFD *anfd = anfds + fd;
2414
2415 if (anfd->reify & EV__IOFDSET && anfd->head)
2416 {
2417 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2418
2419 if (handle != anfd->handle)
2420 {
2421 unsigned long arg;
2422
2423 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2424
2425 /* handle changed, but fd didn't - we need to do it in two steps */
2426 backend_modify (EV_A_ fd, anfd->events, 0);
2427 anfd->events = 0;
2428 anfd->handle = handle;
2429 }
2430 }
2431 }
2432#endif
2433
2434 for (i = 0; i < changecnt; ++i)
2435 {
2436 int fd = fdchanges [i];
2437 ANFD *anfd = anfds + fd;
364 struct ev_io *w; 2438 ev_io *w;
365 2439
366 int events = 0; 2440 unsigned char o_events = anfd->events;
367 2441 unsigned char o_reify = anfd->reify;
368 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
369 events |= w->events;
370 2442
371 anfd->reify = 0; 2443 anfd->reify = 0;
372 2444
373 method_modify (EV_A_ fd, anfd->events, events); 2445 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
2446 {
374 anfd->events = events; 2447 anfd->events = 0;
375 }
376 2448
2449 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2450 anfd->events |= (unsigned char)w->events;
2451
2452 if (o_events != anfd->events)
2453 o_reify = EV__IOFDSET; /* actually |= */
2454 }
2455
2456 if (o_reify & EV__IOFDSET)
2457 backend_modify (EV_A_ fd, o_events, anfd->events);
2458 }
2459
2460 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2461 * this is a rare case (see beginning comment in this function), so we copy them to the
2462 * front and hope the backend handles this case.
2463 */
2464 if (ecb_expect_false (fdchangecnt != changecnt))
2465 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2466
377 fdchangecnt = 0; 2467 fdchangecnt -= changecnt;
378} 2468}
379 2469
380static void 2470/* something about the given fd changed */
2471inline_size
2472void
381fd_change (EV_P_ int fd) 2473fd_change (EV_P_ int fd, int flags)
382{ 2474{
383 if (anfds [fd].reify || fdchangecnt < 0) 2475 unsigned char reify = anfds [fd].reify;
384 return;
385
386 anfds [fd].reify = 1; 2476 anfds [fd].reify = reify | flags;
387 2477
2478 if (ecb_expect_true (!reify))
2479 {
388 ++fdchangecnt; 2480 ++fdchangecnt;
389 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2481 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
390 fdchanges [fdchangecnt - 1] = fd; 2482 fdchanges [fdchangecnt - 1] = fd;
2483 }
391} 2484}
392 2485
393static void 2486/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2487inline_speed ecb_cold void
394fd_kill (EV_P_ int fd) 2488fd_kill (EV_P_ int fd)
395{ 2489{
396 struct ev_io *w; 2490 ev_io *w;
397 2491
398 while ((w = (struct ev_io *)anfds [fd].head)) 2492 while ((w = (ev_io *)anfds [fd].head))
399 { 2493 {
400 ev_io_stop (EV_A_ w); 2494 ev_io_stop (EV_A_ w);
401 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
402 } 2496 }
2497}
2498
2499/* check whether the given fd is actually valid, for error recovery */
2500inline_size ecb_cold int
2501fd_valid (int fd)
2502{
2503#ifdef _WIN32
2504 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
2505#else
2506 return fcntl (fd, F_GETFD) != -1;
2507#endif
403} 2508}
404 2509
405/* called on EBADF to verify fds */ 2510/* called on EBADF to verify fds */
2511ecb_noinline ecb_cold
406static void 2512static void
407fd_ebadf (EV_P) 2513fd_ebadf (EV_P)
408{ 2514{
409 int fd; 2515 int fd;
410 2516
411 for (fd = 0; fd < anfdmax; ++fd) 2517 for (fd = 0; fd < anfdmax; ++fd)
412 if (anfds [fd].events) 2518 if (anfds [fd].events)
413 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 2519 if (!fd_valid (fd) && errno == EBADF)
414 fd_kill (EV_A_ fd); 2520 fd_kill (EV_A_ fd);
415} 2521}
416 2522
417/* called on ENOMEM in select/poll to kill some fds and retry */ 2523/* called on ENOMEM in select/poll to kill some fds and retry */
2524ecb_noinline ecb_cold
418static void 2525static void
419fd_enomem (EV_P) 2526fd_enomem (EV_P)
420{ 2527{
421 int fd; 2528 int fd;
422 2529
423 for (fd = anfdmax; fd--; ) 2530 for (fd = anfdmax; fd--; )
424 if (anfds [fd].events) 2531 if (anfds [fd].events)
425 { 2532 {
426 fd_kill (EV_A_ fd); 2533 fd_kill (EV_A_ fd);
427 return; 2534 break;
428 } 2535 }
429} 2536}
430 2537
431/* susually called after fork if method needs to re-arm all fds from scratch */ 2538/* usually called after fork if backend needs to re-arm all fds from scratch */
2539ecb_noinline
432static void 2540static void
433fd_rearm_all (EV_P) 2541fd_rearm_all (EV_P)
434{ 2542{
435 int fd; 2543 int fd;
436 2544
437 /* this should be highly optimised to not do anything but set a flag */
438 for (fd = 0; fd < anfdmax; ++fd) 2545 for (fd = 0; fd < anfdmax; ++fd)
439 if (anfds [fd].events) 2546 if (anfds [fd].events)
440 { 2547 {
441 anfds [fd].events = 0; 2548 anfds [fd].events = 0;
442 fd_change (EV_A_ fd); 2549 anfds [fd].emask = 0;
2550 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
443 } 2551 }
444} 2552}
445 2553
2554/* used to prepare libev internal fd's */
2555/* this is not fork-safe */
2556inline_speed void
2557fd_intern (int fd)
2558{
2559#ifdef _WIN32
2560 unsigned long arg = 1;
2561 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2562#else
2563 fcntl (fd, F_SETFD, FD_CLOEXEC);
2564 fcntl (fd, F_SETFL, O_NONBLOCK);
2565#endif
2566}
2567
446/*****************************************************************************/ 2568/*****************************************************************************/
447 2569
2570/*
2571 * the heap functions want a real array index. array index 0 is guaranteed to not
2572 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2573 * the branching factor of the d-tree.
2574 */
2575
2576/*
2577 * at the moment we allow libev the luxury of two heaps,
2578 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2579 * which is more cache-efficient.
2580 * the difference is about 5% with 50000+ watchers.
2581 */
2582#if EV_USE_4HEAP
2583
2584#define DHEAP 4
2585#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2586#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2587#define UPHEAP_DONE(p,k) ((p) == (k))
2588
2589/* away from the root */
2590inline_speed void
2591downheap (ANHE *heap, int N, int k)
2592{
2593 ANHE he = heap [k];
2594 ANHE *E = heap + N + HEAP0;
2595
2596 for (;;)
2597 {
2598 ev_tstamp minat;
2599 ANHE *minpos;
2600 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2601
2602 /* find minimum child */
2603 if (ecb_expect_true (pos + DHEAP - 1 < E))
2604 {
2605 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2606 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2607 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2608 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2609 }
2610 else if (pos < E)
2611 {
2612 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2613 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2614 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2615 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2616 }
2617 else
2618 break;
2619
2620 if (ANHE_at (he) <= minat)
2621 break;
2622
2623 heap [k] = *minpos;
2624 ev_active (ANHE_w (*minpos)) = k;
2625
2626 k = minpos - heap;
2627 }
2628
2629 heap [k] = he;
2630 ev_active (ANHE_w (he)) = k;
2631}
2632
2633#else /* not 4HEAP */
2634
2635#define HEAP0 1
2636#define HPARENT(k) ((k) >> 1)
2637#define UPHEAP_DONE(p,k) (!(p))
2638
2639/* away from the root */
2640inline_speed void
2641downheap (ANHE *heap, int N, int k)
2642{
2643 ANHE he = heap [k];
2644
2645 for (;;)
2646 {
2647 int c = k << 1;
2648
2649 if (c >= N + HEAP0)
2650 break;
2651
2652 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2653 ? 1 : 0;
2654
2655 if (ANHE_at (he) <= ANHE_at (heap [c]))
2656 break;
2657
2658 heap [k] = heap [c];
2659 ev_active (ANHE_w (heap [k])) = k;
2660
2661 k = c;
2662 }
2663
2664 heap [k] = he;
2665 ev_active (ANHE_w (he)) = k;
2666}
2667#endif
2668
2669/* towards the root */
2670inline_speed void
2671upheap (ANHE *heap, int k)
2672{
2673 ANHE he = heap [k];
2674
2675 for (;;)
2676 {
2677 int p = HPARENT (k);
2678
2679 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2680 break;
2681
2682 heap [k] = heap [p];
2683 ev_active (ANHE_w (heap [k])) = k;
2684 k = p;
2685 }
2686
2687 heap [k] = he;
2688 ev_active (ANHE_w (he)) = k;
2689}
2690
2691/* move an element suitably so it is in a correct place */
2692inline_size void
2693adjustheap (ANHE *heap, int N, int k)
2694{
2695 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2696 upheap (heap, k);
2697 else
2698 downheap (heap, N, k);
2699}
2700
2701/* rebuild the heap: this function is used only once and executed rarely */
2702inline_size void
2703reheap (ANHE *heap, int N)
2704{
2705 int i;
2706
2707 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2708 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2709 for (i = 0; i < N; ++i)
2710 upheap (heap, i + HEAP0);
2711}
2712
2713/*****************************************************************************/
2714
2715/* associate signal watchers to a signal */
2716typedef struct
2717{
2718 EV_ATOMIC_T pending;
2719#if EV_MULTIPLICITY
2720 EV_P;
2721#endif
2722 WL head;
2723} ANSIG;
2724
2725static ANSIG signals [EV_NSIG - 1];
2726
2727/*****************************************************************************/
2728
2729#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2730
2731ecb_noinline ecb_cold
448static void 2732static void
449upheap (WT *heap, int k) 2733evpipe_init (EV_P)
450{ 2734{
451 WT w = heap [k]; 2735 if (!ev_is_active (&pipe_w))
452
453 while (k && heap [k >> 1]->at > w->at)
454 {
455 heap [k] = heap [k >> 1];
456 ((W)heap [k])->active = k + 1;
457 k >>= 1;
458 } 2736 {
2737 int fds [2];
459 2738
460 heap [k] = w; 2739# if EV_USE_EVENTFD
461 ((W)heap [k])->active = k + 1; 2740 fds [0] = -1;
2741 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2742 if (fds [1] < 0 && errno == EINVAL)
2743 fds [1] = eventfd (0, 0);
462 2744
463} 2745 if (fds [1] < 0)
2746# endif
2747 {
2748 while (pipe (fds))
2749 ev_syserr ("(libev) error creating signal/async pipe");
464 2750
2751 fd_intern (fds [0]);
2752 }
2753
2754 evpipe [0] = fds [0];
2755
2756 if (evpipe [1] < 0)
2757 evpipe [1] = fds [1]; /* first call, set write fd */
2758 else
2759 {
2760 /* on subsequent calls, do not change evpipe [1] */
2761 /* so that evpipe_write can always rely on its value. */
2762 /* this branch does not do anything sensible on windows, */
2763 /* so must not be executed on windows */
2764
2765 dup2 (fds [1], evpipe [1]);
2766 close (fds [1]);
2767 }
2768
2769 fd_intern (evpipe [1]);
2770
2771 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2772 ev_io_start (EV_A_ &pipe_w);
2773 ev_unref (EV_A); /* watcher should not keep loop alive */
2774 }
2775}
2776
2777inline_speed void
2778evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2779{
2780 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2781
2782 if (ecb_expect_true (*flag))
2783 return;
2784
2785 *flag = 1;
2786 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2787
2788 pipe_write_skipped = 1;
2789
2790 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2791
2792 if (pipe_write_wanted)
2793 {
2794 int old_errno;
2795
2796 pipe_write_skipped = 0;
2797 ECB_MEMORY_FENCE_RELEASE;
2798
2799 old_errno = errno; /* save errno because write will clobber it */
2800
2801#if EV_USE_EVENTFD
2802 if (evpipe [0] < 0)
2803 {
2804 uint64_t counter = 1;
2805 write (evpipe [1], &counter, sizeof (uint64_t));
2806 }
2807 else
2808#endif
2809 {
2810#ifdef _WIN32
2811 WSABUF buf;
2812 DWORD sent;
2813 buf.buf = (char *)&buf;
2814 buf.len = 1;
2815 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2816#else
2817 write (evpipe [1], &(evpipe [1]), 1);
2818#endif
2819 }
2820
2821 errno = old_errno;
2822 }
2823}
2824
2825/* called whenever the libev signal pipe */
2826/* got some events (signal, async) */
465static void 2827static void
466downheap (WT *heap, int N, int k) 2828pipecb (EV_P_ ev_io *iow, int revents)
467{ 2829{
468 WT w = heap [k]; 2830 int i;
469 2831
470 while (k < (N >> 1)) 2832 if (revents & EV_READ)
2833 {
2834#if EV_USE_EVENTFD
2835 if (evpipe [0] < 0)
2836 {
2837 uint64_t counter;
2838 read (evpipe [1], &counter, sizeof (uint64_t));
2839 }
2840 else
2841#endif
2842 {
2843 char dummy[4];
2844#ifdef _WIN32
2845 WSABUF buf;
2846 DWORD recvd;
2847 DWORD flags = 0;
2848 buf.buf = dummy;
2849 buf.len = sizeof (dummy);
2850 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2851#else
2852 read (evpipe [0], &dummy, sizeof (dummy));
2853#endif
2854 }
471 { 2855 }
472 int j = k << 1;
473 2856
474 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 2857 pipe_write_skipped = 0;
475 ++j;
476 2858
477 if (w->at <= heap [j]->at) 2859 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2860
2861#if EV_SIGNAL_ENABLE
2862 if (sig_pending)
2863 {
2864 sig_pending = 0;
2865
2866 ECB_MEMORY_FENCE;
2867
2868 for (i = EV_NSIG - 1; i--; )
2869 if (ecb_expect_false (signals [i].pending))
2870 ev_feed_signal_event (EV_A_ i + 1);
2871 }
2872#endif
2873
2874#if EV_ASYNC_ENABLE
2875 if (async_pending)
2876 {
2877 async_pending = 0;
2878
2879 ECB_MEMORY_FENCE;
2880
2881 for (i = asynccnt; i--; )
2882 if (asyncs [i]->sent)
2883 {
2884 asyncs [i]->sent = 0;
2885 ECB_MEMORY_FENCE_RELEASE;
2886 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2887 }
2888 }
2889#endif
2890}
2891
2892/*****************************************************************************/
2893
2894void
2895ev_feed_signal (int signum) EV_NOEXCEPT
2896{
2897#if EV_MULTIPLICITY
2898 EV_P;
2899 ECB_MEMORY_FENCE_ACQUIRE;
2900 EV_A = signals [signum - 1].loop;
2901
2902 if (!EV_A)
2903 return;
2904#endif
2905
2906 signals [signum - 1].pending = 1;
2907 evpipe_write (EV_A_ &sig_pending);
2908}
2909
2910static void
2911ev_sighandler (int signum)
2912{
2913#ifdef _WIN32
2914 signal (signum, ev_sighandler);
2915#endif
2916
2917 ev_feed_signal (signum);
2918}
2919
2920ecb_noinline
2921void
2922ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2923{
2924 WL w;
2925
2926 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
2927 return;
2928
2929 --signum;
2930
2931#if EV_MULTIPLICITY
2932 /* it is permissible to try to feed a signal to the wrong loop */
2933 /* or, likely more useful, feeding a signal nobody is waiting for */
2934
2935 if (ecb_expect_false (signals [signum].loop != EV_A))
2936 return;
2937#endif
2938
2939 signals [signum].pending = 0;
2940 ECB_MEMORY_FENCE_RELEASE;
2941
2942 for (w = signals [signum].head; w; w = w->next)
2943 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2944}
2945
2946#if EV_USE_SIGNALFD
2947static void
2948sigfdcb (EV_P_ ev_io *iow, int revents)
2949{
2950 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2951
2952 for (;;)
2953 {
2954 ssize_t res = read (sigfd, si, sizeof (si));
2955
2956 /* not ISO-C, as res might be -1, but works with SuS */
2957 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2958 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2959
2960 if (res < (ssize_t)sizeof (si))
478 break; 2961 break;
479
480 heap [k] = heap [j];
481 ((W)heap [k])->active = k + 1;
482 k = j;
483 } 2962 }
484
485 heap [k] = w;
486 ((W)heap [k])->active = k + 1;
487} 2963}
2964#endif
2965
2966#endif
488 2967
489/*****************************************************************************/ 2968/*****************************************************************************/
490 2969
491typedef struct 2970#if EV_CHILD_ENABLE
492{ 2971static WL childs [EV_PID_HASHSIZE];
493 WL head;
494 sig_atomic_t volatile gotsig;
495} ANSIG;
496 2972
497static ANSIG *signals;
498static int signalmax;
499
500static int sigpipe [2];
501static sig_atomic_t volatile gotsig;
502static struct ev_io sigev;
503
504static void
505signals_init (ANSIG *base, int count)
506{
507 while (count--)
508 {
509 base->head = 0;
510 base->gotsig = 0;
511
512 ++base;
513 }
514}
515
516static void
517sighandler (int signum)
518{
519#if WIN32
520 signal (signum, sighandler);
521#endif
522
523 signals [signum - 1].gotsig = 1;
524
525 if (!gotsig)
526 {
527 int old_errno = errno;
528 gotsig = 1;
529 write (sigpipe [1], &signum, 1);
530 errno = old_errno;
531 }
532}
533
534static void
535sigcb (EV_P_ struct ev_io *iow, int revents)
536{
537 WL w;
538 int signum;
539
540 read (sigpipe [0], &revents, 1);
541 gotsig = 0;
542
543 for (signum = signalmax; signum--; )
544 if (signals [signum].gotsig)
545 {
546 signals [signum].gotsig = 0;
547
548 for (w = signals [signum].head; w; w = w->next)
549 event (EV_A_ (W)w, EV_SIGNAL);
550 }
551}
552
553static void
554siginit (EV_P)
555{
556#ifndef WIN32
557 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
558 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
559
560 /* rather than sort out wether we really need nb, set it */
561 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
562 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
563#endif
564
565 ev_io_set (&sigev, sigpipe [0], EV_READ);
566 ev_io_start (EV_A_ &sigev);
567 ev_unref (EV_A); /* child watcher should not keep loop alive */
568}
569
570/*****************************************************************************/
571
572#ifndef WIN32
573
574static struct ev_child *childs [PID_HASHSIZE];
575static struct ev_signal childev; 2973static ev_signal childev;
2974
2975#ifndef WIFCONTINUED
2976# define WIFCONTINUED(status) 0
2977#endif
2978
2979/* handle a single child status event */
2980inline_speed void
2981child_reap (EV_P_ int chain, int pid, int status)
2982{
2983 ev_child *w;
2984 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2985
2986 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2987 {
2988 if ((w->pid == pid || !w->pid)
2989 && (!traced || (w->flags & 1)))
2990 {
2991 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2992 w->rpid = pid;
2993 w->rstatus = status;
2994 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2995 }
2996 }
2997}
576 2998
577#ifndef WCONTINUED 2999#ifndef WCONTINUED
578# define WCONTINUED 0 3000# define WCONTINUED 0
579#endif 3001#endif
580 3002
3003/* called on sigchld etc., calls waitpid */
581static void 3004static void
582child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) 3005childcb (EV_P_ ev_signal *sw, int revents)
583{ 3006{
584 struct ev_child *w; 3007 int pid, status;
585 3008
586 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) 3009 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
587 if (w->pid == pid || !w->pid) 3010 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
588 { 3011 if (!WCONTINUED
589 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 3012 || errno != EINVAL
590 w->rpid = pid; 3013 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
591 w->rstatus = status; 3014 return;
592 event (EV_A_ (W)w, EV_CHILD); 3015
593 } 3016 /* make sure we are called again until all children have been reaped */
3017 /* we need to do it this way so that the callback gets called before we continue */
3018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
3019
3020 child_reap (EV_A_ pid, pid, status);
3021 if ((EV_PID_HASHSIZE) > 1)
3022 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
594} 3023}
3024
3025#endif
3026
3027/*****************************************************************************/
3028
3029#if EV_USE_TIMERFD
3030
3031static void periodics_reschedule (EV_P);
595 3032
596static void 3033static void
597childcb (EV_P_ struct ev_signal *sw, int revents) 3034timerfdcb (EV_P_ ev_io *iow, int revents)
598{ 3035{
599 int pid, status; 3036 struct itimerspec its = { 0 };
600 3037
601 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 3038 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
602 { 3039 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
603 /* make sure we are called again until all childs have been reaped */
604 event (EV_A_ (W)sw, EV_SIGNAL);
605 3040
606 child_reap (EV_A_ sw, pid, pid, status); 3041 ev_rt_now = ev_time ();
607 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 3042 /* periodics_reschedule only needs ev_rt_now */
3043 /* but maybe in the future we want the full treatment. */
3044 /*
3045 now_floor = EV_TS_CONST (0.);
3046 time_update (EV_A_ EV_TSTAMP_HUGE);
3047 */
3048#if EV_PERIODIC_ENABLE
3049 periodics_reschedule (EV_A);
3050#endif
3051}
3052
3053ecb_noinline ecb_cold
3054static void
3055evtimerfd_init (EV_P)
3056{
3057 if (!ev_is_active (&timerfd_w))
3058 {
3059 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3060
3061 if (timerfd >= 0)
3062 {
3063 fd_intern (timerfd); /* just to be sure */
3064
3065 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3066 ev_set_priority (&timerfd_w, EV_MINPRI);
3067 ev_io_start (EV_A_ &timerfd_w);
3068 ev_unref (EV_A); /* watcher should not keep loop alive */
3069
3070 /* (re-) arm timer */
3071 timerfdcb (EV_A_ 0, 0);
3072 }
608 } 3073 }
609} 3074}
610 3075
611#endif 3076#endif
612 3077
613/*****************************************************************************/ 3078/*****************************************************************************/
614 3079
3080#if EV_USE_IOCP
3081# include "ev_iocp.c"
3082#endif
3083#if EV_USE_PORT
3084# include "ev_port.c"
3085#endif
615#if EV_USE_KQUEUE 3086#if EV_USE_KQUEUE
616# include "ev_kqueue.c" 3087# include "ev_kqueue.c"
617#endif 3088#endif
618#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
619# include "ev_epoll.c" 3090# include "ev_epoll.c"
620#endif 3091#endif
3092#if EV_USE_LINUXAIO
3093# include "ev_linuxaio.c"
3094#endif
3095#if EV_USE_IOURING
3096# include "ev_iouring.c"
3097#endif
621#if EV_USE_POLL 3098#if EV_USE_POLL
622# include "ev_poll.c" 3099# include "ev_poll.c"
623#endif 3100#endif
624#if EV_USE_SELECT 3101#if EV_USE_SELECT
625# include "ev_select.c" 3102# include "ev_select.c"
626#endif 3103#endif
627 3104
628int 3105ecb_cold int
629ev_version_major (void) 3106ev_version_major (void) EV_NOEXCEPT
630{ 3107{
631 return EV_VERSION_MAJOR; 3108 return EV_VERSION_MAJOR;
632} 3109}
633 3110
634int 3111ecb_cold int
635ev_version_minor (void) 3112ev_version_minor (void) EV_NOEXCEPT
636{ 3113{
637 return EV_VERSION_MINOR; 3114 return EV_VERSION_MINOR;
638} 3115}
639 3116
640/* return true if we are running with elevated privileges and should ignore env variables */ 3117/* return true if we are running with elevated privileges and should ignore env variables */
641static int 3118inline_size ecb_cold int
642enable_secure (void) 3119enable_secure (void)
643{ 3120{
644#ifdef WIN32 3121#ifdef _WIN32
645 return 0; 3122 return 0;
646#else 3123#else
647 return getuid () != geteuid () 3124 return getuid () != geteuid ()
648 || getgid () != getegid (); 3125 || getgid () != getegid ();
649#endif 3126#endif
650} 3127}
651 3128
652int 3129ecb_cold
653ev_method (EV_P) 3130unsigned int
3131ev_supported_backends (void) EV_NOEXCEPT
654{ 3132{
655 return method; 3133 unsigned int flags = 0;
656}
657 3134
3135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
3136 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
3137 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
3138 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
3139 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
3140 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3141 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3142
3143 return flags;
3144}
3145
3146ecb_cold
3147unsigned int
3148ev_recommended_backends (void) EV_NOEXCEPT
3149{
3150 unsigned int flags = ev_supported_backends ();
3151
3152#ifndef __NetBSD__
3153 /* kqueue is borked on everything but netbsd apparently */
3154 /* it usually doesn't work correctly on anything but sockets and pipes */
3155 flags &= ~EVBACKEND_KQUEUE;
3156#endif
3157#ifdef __APPLE__
3158 /* only select works correctly on that "unix-certified" platform */
3159 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
3160 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
3161#endif
3162#ifdef __FreeBSD__
3163 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
3164#endif
3165
3166 /* TODO: linuxaio is very experimental */
3167#if !EV_RECOMMEND_LINUXAIO
3168 flags &= ~EVBACKEND_LINUXAIO;
3169#endif
3170 /* TODO: iouring is super experimental */
3171#if !EV_RECOMMEND_IOURING
3172 flags &= ~EVBACKEND_IOURING;
3173#endif
3174
3175 return flags;
3176}
3177
3178ecb_cold
3179unsigned int
3180ev_embeddable_backends (void) EV_NOEXCEPT
3181{
3182 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
3183
3184 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
3185 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
3186 flags &= ~EVBACKEND_EPOLL;
3187
3188 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3189
3190 return flags;
3191}
3192
3193unsigned int
3194ev_backend (EV_P) EV_NOEXCEPT
3195{
3196 return backend;
3197}
3198
3199#if EV_FEATURE_API
3200unsigned int
3201ev_iteration (EV_P) EV_NOEXCEPT
3202{
3203 return loop_count;
3204}
3205
3206unsigned int
3207ev_depth (EV_P) EV_NOEXCEPT
3208{
3209 return loop_depth;
3210}
3211
3212void
3213ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
3214{
3215 io_blocktime = interval;
3216}
3217
3218void
3219ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
3220{
3221 timeout_blocktime = interval;
3222}
3223
3224void
3225ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
3226{
3227 userdata = data;
3228}
3229
3230void *
3231ev_userdata (EV_P) EV_NOEXCEPT
3232{
3233 return userdata;
3234}
3235
3236void
3237ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
3238{
3239 invoke_cb = invoke_pending_cb;
3240}
3241
3242void
3243ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
3244{
3245 release_cb = release;
3246 acquire_cb = acquire;
3247}
3248#endif
3249
3250/* initialise a loop structure, must be zero-initialised */
3251ecb_noinline ecb_cold
658static void 3252static void
659loop_init (EV_P_ int methods) 3253loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
660{ 3254{
661 if (!method) 3255 if (!backend)
662 { 3256 {
3257 origflags = flags;
3258
3259#if EV_USE_REALTIME
3260 if (!have_realtime)
3261 {
3262 struct timespec ts;
3263
3264 if (!clock_gettime (CLOCK_REALTIME, &ts))
3265 have_realtime = 1;
3266 }
3267#endif
3268
663#if EV_USE_MONOTONIC 3269#if EV_USE_MONOTONIC
3270 if (!have_monotonic)
664 { 3271 {
665 struct timespec ts; 3272 struct timespec ts;
3273
666 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3274 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
667 have_monotonic = 1; 3275 have_monotonic = 1;
668 } 3276 }
669#endif 3277#endif
670 3278
3279 /* pid check not overridable via env */
3280#ifndef _WIN32
3281 if (flags & EVFLAG_FORKCHECK)
3282 curpid = getpid ();
3283#endif
3284
3285 if (!(flags & EVFLAG_NOENV)
3286 && !enable_secure ()
3287 && getenv ("LIBEV_FLAGS"))
3288 flags = atoi (getenv ("LIBEV_FLAGS"));
3289
671 rt_now = ev_time (); 3290 ev_rt_now = ev_time ();
672 mn_now = get_clock (); 3291 mn_now = get_clock ();
673 now_floor = mn_now; 3292 now_floor = mn_now;
674 rtmn_diff = rt_now - mn_now; 3293 rtmn_diff = ev_rt_now - mn_now;
3294#if EV_FEATURE_API
3295 invoke_cb = ev_invoke_pending;
3296#endif
675 3297
676 if (methods == EVMETHOD_AUTO) 3298 io_blocktime = 0.;
677 if (!enable_secure () && getenv ("LIBEV_METHODS")) 3299 timeout_blocktime = 0.;
678 methods = atoi (getenv ("LIBEV_METHODS")); 3300 backend = 0;
679 else 3301 backend_fd = -1;
680 methods = EVMETHOD_ANY; 3302 sig_pending = 0;
3303#if EV_ASYNC_ENABLE
3304 async_pending = 0;
3305#endif
3306 pipe_write_skipped = 0;
3307 pipe_write_wanted = 0;
3308 evpipe [0] = -1;
3309 evpipe [1] = -1;
3310#if EV_USE_INOTIFY
3311 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3312#endif
3313#if EV_USE_SIGNALFD
3314 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3315#endif
3316#if EV_USE_TIMERFD
3317 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3318#endif
681 3319
682 method = 0; 3320 if (!(flags & EVBACKEND_MASK))
3321 flags |= ev_recommended_backends ();
3322
683#if EV_USE_WIN32 3323#if EV_USE_IOCP
684 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 3324 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3325#endif
3326#if EV_USE_PORT
3327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
685#endif 3328#endif
686#if EV_USE_KQUEUE 3329#if EV_USE_KQUEUE
687 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 3330 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3331#endif
3332#if EV_USE_IOURING
3333 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3334#endif
3335#if EV_USE_LINUXAIO
3336 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
688#endif 3337#endif
689#if EV_USE_EPOLL 3338#if EV_USE_EPOLL
690 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 3339 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
691#endif 3340#endif
692#if EV_USE_POLL 3341#if EV_USE_POLL
693 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 3342 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
694#endif 3343#endif
695#if EV_USE_SELECT 3344#if EV_USE_SELECT
696 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 3345 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
697#endif 3346#endif
698 }
699}
700 3347
701void 3348 ev_prepare_init (&pending_w, pendingcb);
702loop_destroy (EV_P)
703{
704 int i;
705 3349
706#if EV_USE_WIN32 3350#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
707 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 3351 ev_init (&pipe_w, pipecb);
3352 ev_set_priority (&pipe_w, EV_MAXPRI);
708#endif 3353#endif
709#if EV_USE_KQUEUE 3354 }
710 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
711#endif
712#if EV_USE_EPOLL
713 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
714#endif
715#if EV_USE_POLL
716 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
717#endif
718#if EV_USE_SELECT
719 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
720#endif
721
722 for (i = NUMPRI; i--; )
723 array_free (pending, [i]);
724
725 array_free (fdchange, );
726 array_free (timer, );
727 array_free (periodic, );
728 array_free (idle, );
729 array_free (prepare, );
730 array_free (check, );
731
732 method = 0;
733 /*TODO*/
734} 3355}
735 3356
736void 3357/* free up a loop structure */
737loop_fork (EV_P) 3358ecb_cold
738{
739 /*TODO*/
740#if EV_USE_EPOLL
741 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
742#endif
743#if EV_USE_KQUEUE
744 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
745#endif
746}
747
748#if EV_MULTIPLICITY
749struct ev_loop *
750ev_loop_new (int methods)
751{
752 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
753
754 memset (loop, 0, sizeof (struct ev_loop));
755
756 loop_init (EV_A_ methods);
757
758 if (ev_method (EV_A))
759 return loop;
760
761 return 0;
762}
763
764void 3359void
765ev_loop_destroy (EV_P) 3360ev_loop_destroy (EV_P)
766{ 3361{
767 loop_destroy (EV_A); 3362 int i;
768 ev_free (loop);
769}
770
771void
772ev_loop_fork (EV_P)
773{
774 loop_fork (EV_A);
775}
776
777#endif
778 3363
779#if EV_MULTIPLICITY 3364#if EV_MULTIPLICITY
780struct ev_loop default_loop_struct; 3365 /* mimic free (0) */
781static struct ev_loop *default_loop; 3366 if (!EV_A)
3367 return;
3368#endif
782 3369
3370#if EV_CLEANUP_ENABLE
3371 /* queue cleanup watchers (and execute them) */
3372 if (ecb_expect_false (cleanupcnt))
3373 {
3374 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3375 EV_INVOKE_PENDING;
3376 }
3377#endif
3378
3379#if EV_CHILD_ENABLE
3380 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3381 {
3382 ev_ref (EV_A); /* child watcher */
3383 ev_signal_stop (EV_A_ &childev);
3384 }
3385#endif
3386
3387 if (ev_is_active (&pipe_w))
3388 {
3389 /*ev_ref (EV_A);*/
3390 /*ev_io_stop (EV_A_ &pipe_w);*/
3391
3392 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3393 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3394 }
3395
3396#if EV_USE_SIGNALFD
3397 if (ev_is_active (&sigfd_w))
3398 close (sigfd);
3399#endif
3400
3401#if EV_USE_TIMERFD
3402 if (ev_is_active (&timerfd_w))
3403 close (timerfd);
3404#endif
3405
3406#if EV_USE_INOTIFY
3407 if (fs_fd >= 0)
3408 close (fs_fd);
3409#endif
3410
3411 if (backend_fd >= 0)
3412 close (backend_fd);
3413
3414#if EV_USE_IOCP
3415 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3416#endif
3417#if EV_USE_PORT
3418 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
3419#endif
3420#if EV_USE_KQUEUE
3421 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3422#endif
3423#if EV_USE_IOURING
3424 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3425#endif
3426#if EV_USE_LINUXAIO
3427 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
3428#endif
3429#if EV_USE_EPOLL
3430 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
3431#endif
3432#if EV_USE_POLL
3433 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
3434#endif
3435#if EV_USE_SELECT
3436 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
3437#endif
3438
3439 for (i = NUMPRI; i--; )
3440 {
3441 array_free (pending, [i]);
3442#if EV_IDLE_ENABLE
3443 array_free (idle, [i]);
3444#endif
3445 }
3446
3447 ev_free (anfds); anfds = 0; anfdmax = 0;
3448
3449 /* have to use the microsoft-never-gets-it-right macro */
3450 array_free (rfeed, EMPTY);
3451 array_free (fdchange, EMPTY);
3452 array_free (timer, EMPTY);
3453#if EV_PERIODIC_ENABLE
3454 array_free (periodic, EMPTY);
3455#endif
3456#if EV_FORK_ENABLE
3457 array_free (fork, EMPTY);
3458#endif
3459#if EV_CLEANUP_ENABLE
3460 array_free (cleanup, EMPTY);
3461#endif
3462 array_free (prepare, EMPTY);
3463 array_free (check, EMPTY);
3464#if EV_ASYNC_ENABLE
3465 array_free (async, EMPTY);
3466#endif
3467
3468 backend = 0;
3469
3470#if EV_MULTIPLICITY
3471 if (ev_is_default_loop (EV_A))
3472#endif
3473 ev_default_loop_ptr = 0;
3474#if EV_MULTIPLICITY
3475 else
3476 ev_free (EV_A);
3477#endif
3478}
3479
3480#if EV_USE_INOTIFY
3481inline_size void infy_fork (EV_P);
3482#endif
3483
3484inline_size void
3485loop_fork (EV_P)
3486{
3487#if EV_USE_PORT
3488 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
3489#endif
3490#if EV_USE_KQUEUE
3491 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3492#endif
3493#if EV_USE_IOURING
3494 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3495#endif
3496#if EV_USE_LINUXAIO
3497 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
3498#endif
3499#if EV_USE_EPOLL
3500 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
3501#endif
3502#if EV_USE_INOTIFY
3503 infy_fork (EV_A);
3504#endif
3505
3506 if (postfork != 2)
3507 {
3508 #if EV_USE_SIGNALFD
3509 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3510 #endif
3511
3512 #if EV_USE_TIMERFD
3513 if (ev_is_active (&timerfd_w))
3514 {
3515 ev_ref (EV_A);
3516 ev_io_stop (EV_A_ &timerfd_w);
3517
3518 close (timerfd);
3519 timerfd = -2;
3520
3521 evtimerfd_init (EV_A);
3522 /* reschedule periodics, in case we missed something */
3523 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3524 }
3525 #endif
3526
3527 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3528 if (ev_is_active (&pipe_w))
3529 {
3530 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3531
3532 ev_ref (EV_A);
3533 ev_io_stop (EV_A_ &pipe_w);
3534
3535 if (evpipe [0] >= 0)
3536 EV_WIN32_CLOSE_FD (evpipe [0]);
3537
3538 evpipe_init (EV_A);
3539 /* iterate over everything, in case we missed something before */
3540 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3541 }
3542 #endif
3543 }
3544
3545 postfork = 0;
3546}
3547
3548#if EV_MULTIPLICITY
3549
3550ecb_cold
3551struct ev_loop *
3552ev_loop_new (unsigned int flags) EV_NOEXCEPT
3553{
3554 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3555
3556 memset (EV_A, 0, sizeof (struct ev_loop));
3557 loop_init (EV_A_ flags);
3558
3559 if (ev_backend (EV_A))
3560 return EV_A;
3561
3562 ev_free (EV_A);
3563 return 0;
3564}
3565
3566#endif /* multiplicity */
3567
3568#if EV_VERIFY
3569ecb_noinline ecb_cold
3570static void
3571verify_watcher (EV_P_ W w)
3572{
3573 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3574
3575 if (w->pending)
3576 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3577}
3578
3579ecb_noinline ecb_cold
3580static void
3581verify_heap (EV_P_ ANHE *heap, int N)
3582{
3583 int i;
3584
3585 for (i = HEAP0; i < N + HEAP0; ++i)
3586 {
3587 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3588 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3589 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3590
3591 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3592 }
3593}
3594
3595ecb_noinline ecb_cold
3596static void
3597array_verify (EV_P_ W *ws, int cnt)
3598{
3599 while (cnt--)
3600 {
3601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3602 verify_watcher (EV_A_ ws [cnt]);
3603 }
3604}
3605#endif
3606
3607#if EV_FEATURE_API
3608void ecb_cold
3609ev_verify (EV_P) EV_NOEXCEPT
3610{
3611#if EV_VERIFY
3612 int i;
3613 WL w, w2;
3614
3615 assert (activecnt >= -1);
3616
3617 assert (fdchangemax >= fdchangecnt);
3618 for (i = 0; i < fdchangecnt; ++i)
3619 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3620
3621 assert (anfdmax >= 0);
3622 for (i = 0; i < anfdmax; ++i)
3623 {
3624 int j = 0;
3625
3626 for (w = w2 = anfds [i].head; w; w = w->next)
3627 {
3628 verify_watcher (EV_A_ (W)w);
3629
3630 if (j++ & 1)
3631 {
3632 assert (("libev: io watcher list contains a loop", w != w2));
3633 w2 = w2->next;
3634 }
3635
3636 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3637 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3638 }
3639 }
3640
3641 assert (timermax >= timercnt);
3642 verify_heap (EV_A_ timers, timercnt);
3643
3644#if EV_PERIODIC_ENABLE
3645 assert (periodicmax >= periodiccnt);
3646 verify_heap (EV_A_ periodics, periodiccnt);
3647#endif
3648
3649 for (i = NUMPRI; i--; )
3650 {
3651 assert (pendingmax [i] >= pendingcnt [i]);
3652#if EV_IDLE_ENABLE
3653 assert (idleall >= 0);
3654 assert (idlemax [i] >= idlecnt [i]);
3655 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3656#endif
3657 }
3658
3659#if EV_FORK_ENABLE
3660 assert (forkmax >= forkcnt);
3661 array_verify (EV_A_ (W *)forks, forkcnt);
3662#endif
3663
3664#if EV_CLEANUP_ENABLE
3665 assert (cleanupmax >= cleanupcnt);
3666 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3667#endif
3668
3669#if EV_ASYNC_ENABLE
3670 assert (asyncmax >= asynccnt);
3671 array_verify (EV_A_ (W *)asyncs, asynccnt);
3672#endif
3673
3674#if EV_PREPARE_ENABLE
3675 assert (preparemax >= preparecnt);
3676 array_verify (EV_A_ (W *)prepares, preparecnt);
3677#endif
3678
3679#if EV_CHECK_ENABLE
3680 assert (checkmax >= checkcnt);
3681 array_verify (EV_A_ (W *)checks, checkcnt);
3682#endif
3683
3684# if 0
3685#if EV_CHILD_ENABLE
3686 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3687 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3688#endif
3689# endif
3690#endif
3691}
3692#endif
3693
3694#if EV_MULTIPLICITY
3695ecb_cold
783struct ev_loop * 3696struct ev_loop *
784#else 3697#else
785static int default_loop;
786
787int 3698int
788#endif 3699#endif
789ev_default_loop (int methods) 3700ev_default_loop (unsigned int flags) EV_NOEXCEPT
790{ 3701{
791 if (sigpipe [0] == sigpipe [1])
792 if (pipe (sigpipe))
793 return 0;
794
795 if (!default_loop) 3702 if (!ev_default_loop_ptr)
796 { 3703 {
797#if EV_MULTIPLICITY 3704#if EV_MULTIPLICITY
798 struct ev_loop *loop = default_loop = &default_loop_struct; 3705 EV_P = ev_default_loop_ptr = &default_loop_struct;
799#else 3706#else
800 default_loop = 1; 3707 ev_default_loop_ptr = 1;
801#endif 3708#endif
802 3709
803 loop_init (EV_A_ methods); 3710 loop_init (EV_A_ flags);
804 3711
805 if (ev_method (EV_A)) 3712 if (ev_backend (EV_A))
806 { 3713 {
807 ev_watcher_init (&sigev, sigcb); 3714#if EV_CHILD_ENABLE
808 ev_set_priority (&sigev, EV_MAXPRI);
809 siginit (EV_A);
810
811#ifndef WIN32
812 ev_signal_init (&childev, childcb, SIGCHLD); 3715 ev_signal_init (&childev, childcb, SIGCHLD);
813 ev_set_priority (&childev, EV_MAXPRI); 3716 ev_set_priority (&childev, EV_MAXPRI);
814 ev_signal_start (EV_A_ &childev); 3717 ev_signal_start (EV_A_ &childev);
815 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3718 ev_unref (EV_A); /* child watcher should not keep loop alive */
816#endif 3719#endif
817 } 3720 }
818 else 3721 else
819 default_loop = 0; 3722 ev_default_loop_ptr = 0;
820 } 3723 }
821 3724
822 return default_loop; 3725 return ev_default_loop_ptr;
823} 3726}
824 3727
825void 3728void
826ev_default_destroy (void) 3729ev_loop_fork (EV_P) EV_NOEXCEPT
827{ 3730{
828#if EV_MULTIPLICITY 3731 postfork = 1;
829 struct ev_loop *loop = default_loop;
830#endif
831
832 ev_ref (EV_A); /* child watcher */
833 ev_signal_stop (EV_A_ &childev);
834
835 ev_ref (EV_A); /* signal watcher */
836 ev_io_stop (EV_A_ &sigev);
837
838 close (sigpipe [0]); sigpipe [0] = 0;
839 close (sigpipe [1]); sigpipe [1] = 0;
840
841 loop_destroy (EV_A);
842} 3732}
3733
3734/*****************************************************************************/
843 3735
844void 3736void
845ev_default_fork (void) 3737ev_invoke (EV_P_ void *w, int revents)
846{ 3738{
847#if EV_MULTIPLICITY 3739 EV_CB_INVOKE ((W)w, revents);
848 struct ev_loop *loop = default_loop; 3740}
3741
3742unsigned int
3743ev_pending_count (EV_P) EV_NOEXCEPT
3744{
3745 int pri;
3746 unsigned int count = 0;
3747
3748 for (pri = NUMPRI; pri--; )
3749 count += pendingcnt [pri];
3750
3751 return count;
3752}
3753
3754ecb_noinline
3755void
3756ev_invoke_pending (EV_P)
3757{
3758 pendingpri = NUMPRI;
3759
3760 do
3761 {
3762 --pendingpri;
3763
3764 /* pendingpri possibly gets modified in the inner loop */
3765 while (pendingcnt [pendingpri])
3766 {
3767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3768
3769 p->w->pending = 0;
3770 EV_CB_INVOKE (p->w, p->events);
3771 EV_FREQUENT_CHECK;
3772 }
3773 }
3774 while (pendingpri);
3775}
3776
3777#if EV_IDLE_ENABLE
3778/* make idle watchers pending. this handles the "call-idle */
3779/* only when higher priorities are idle" logic */
3780inline_size void
3781idle_reify (EV_P)
3782{
3783 if (ecb_expect_false (idleall))
3784 {
3785 int pri;
3786
3787 for (pri = NUMPRI; pri--; )
3788 {
3789 if (pendingcnt [pri])
3790 break;
3791
3792 if (idlecnt [pri])
3793 {
3794 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3795 break;
3796 }
3797 }
3798 }
3799}
3800#endif
3801
3802/* make timers pending */
3803inline_size void
3804timers_reify (EV_P)
3805{
3806 EV_FREQUENT_CHECK;
3807
3808 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3809 {
3810 do
3811 {
3812 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3813
3814 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3815
3816 /* first reschedule or stop timer */
3817 if (w->repeat)
3818 {
3819 ev_at (w) += w->repeat;
3820 if (ev_at (w) < mn_now)
3821 ev_at (w) = mn_now;
3822
3823 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
3824
3825 ANHE_at_cache (timers [HEAP0]);
3826 downheap (timers, timercnt, HEAP0);
3827 }
3828 else
3829 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3830
3831 EV_FREQUENT_CHECK;
3832 feed_reverse (EV_A_ (W)w);
3833 }
3834 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3835
3836 feed_reverse_done (EV_A_ EV_TIMER);
3837 }
3838}
3839
3840#if EV_PERIODIC_ENABLE
3841
3842ecb_noinline
3843static void
3844periodic_recalc (EV_P_ ev_periodic *w)
3845{
3846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3847 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3848
3849 /* the above almost always errs on the low side */
3850 while (at <= ev_rt_now)
3851 {
3852 ev_tstamp nat = at + w->interval;
3853
3854 /* when resolution fails us, we use ev_rt_now */
3855 if (ecb_expect_false (nat == at))
3856 {
3857 at = ev_rt_now;
3858 break;
3859 }
3860
3861 at = nat;
3862 }
3863
3864 ev_at (w) = at;
3865}
3866
3867/* make periodics pending */
3868inline_size void
3869periodics_reify (EV_P)
3870{
3871 EV_FREQUENT_CHECK;
3872
3873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3874 {
3875 do
3876 {
3877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3878
3879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3880
3881 /* first reschedule or stop timer */
3882 if (w->reschedule_cb)
3883 {
3884 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3885
3886 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3887
3888 ANHE_at_cache (periodics [HEAP0]);
3889 downheap (periodics, periodiccnt, HEAP0);
3890 }
3891 else if (w->interval)
3892 {
3893 periodic_recalc (EV_A_ w);
3894 ANHE_at_cache (periodics [HEAP0]);
3895 downheap (periodics, periodiccnt, HEAP0);
3896 }
3897 else
3898 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3899
3900 EV_FREQUENT_CHECK;
3901 feed_reverse (EV_A_ (W)w);
3902 }
3903 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3904
3905 feed_reverse_done (EV_A_ EV_PERIODIC);
3906 }
3907}
3908
3909/* simply recalculate all periodics */
3910/* TODO: maybe ensure that at least one event happens when jumping forward? */
3911ecb_noinline ecb_cold
3912static void
3913periodics_reschedule (EV_P)
3914{
3915 int i;
3916
3917 /* adjust periodics after time jump */
3918 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3919 {
3920 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3921
3922 if (w->reschedule_cb)
3923 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3924 else if (w->interval)
3925 periodic_recalc (EV_A_ w);
3926
3927 ANHE_at_cache (periodics [i]);
3928 }
3929
3930 reheap (periodics, periodiccnt);
3931}
3932#endif
3933
3934/* adjust all timers by a given offset */
3935ecb_noinline ecb_cold
3936static void
3937timers_reschedule (EV_P_ ev_tstamp adjust)
3938{
3939 int i;
3940
3941 for (i = 0; i < timercnt; ++i)
3942 {
3943 ANHE *he = timers + i + HEAP0;
3944 ANHE_w (*he)->at += adjust;
3945 ANHE_at_cache (*he);
3946 }
3947}
3948
3949/* fetch new monotonic and realtime times from the kernel */
3950/* also detect if there was a timejump, and act accordingly */
3951inline_speed void
3952time_update (EV_P_ ev_tstamp max_block)
3953{
3954#if EV_USE_MONOTONIC
3955 if (ecb_expect_true (have_monotonic))
3956 {
3957 int i;
3958 ev_tstamp odiff = rtmn_diff;
3959
3960 mn_now = get_clock ();
3961
3962 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3963 /* interpolate in the meantime */
3964 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
3965 {
3966 ev_rt_now = rtmn_diff + mn_now;
3967 return;
3968 }
3969
3970 now_floor = mn_now;
3971 ev_rt_now = ev_time ();
3972
3973 /* loop a few times, before making important decisions.
3974 * on the choice of "4": one iteration isn't enough,
3975 * in case we get preempted during the calls to
3976 * ev_time and get_clock. a second call is almost guaranteed
3977 * to succeed in that case, though. and looping a few more times
3978 * doesn't hurt either as we only do this on time-jumps or
3979 * in the unlikely event of having been preempted here.
3980 */
3981 for (i = 4; --i; )
3982 {
3983 ev_tstamp diff;
3984 rtmn_diff = ev_rt_now - mn_now;
3985
3986 diff = odiff - rtmn_diff;
3987
3988 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
3989 return; /* all is well */
3990
3991 ev_rt_now = ev_time ();
3992 mn_now = get_clock ();
3993 now_floor = mn_now;
3994 }
3995
3996 /* no timer adjustment, as the monotonic clock doesn't jump */
3997 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3998# if EV_PERIODIC_ENABLE
3999 periodics_reschedule (EV_A);
849#endif 4000# endif
4001 }
4002 else
4003#endif
4004 {
4005 ev_rt_now = ev_time ();
850 4006
4007 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
4008 {
4009 /* adjust timers. this is easy, as the offset is the same for all of them */
4010 timers_reschedule (EV_A_ ev_rt_now - mn_now);
4011#if EV_PERIODIC_ENABLE
4012 periodics_reschedule (EV_A);
4013#endif
4014 }
4015
4016 mn_now = ev_rt_now;
4017 }
4018}
4019
4020int
4021ev_run (EV_P_ int flags)
4022{
4023#if EV_FEATURE_API
4024 ++loop_depth;
4025#endif
4026
4027 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
4028
4029 loop_done = EVBREAK_CANCEL;
4030
4031 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
4032
4033 do
4034 {
4035#if EV_VERIFY >= 2
4036 ev_verify (EV_A);
4037#endif
4038
4039#ifndef _WIN32
4040 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
4041 if (ecb_expect_false (getpid () != curpid))
4042 {
4043 curpid = getpid ();
4044 postfork = 1;
4045 }
4046#endif
4047
4048#if EV_FORK_ENABLE
4049 /* we might have forked, so queue fork handlers */
4050 if (ecb_expect_false (postfork))
4051 if (forkcnt)
4052 {
4053 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
4054 EV_INVOKE_PENDING;
4055 }
4056#endif
4057
4058#if EV_PREPARE_ENABLE
4059 /* queue prepare watchers (and execute them) */
4060 if (ecb_expect_false (preparecnt))
4061 {
4062 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
4063 EV_INVOKE_PENDING;
4064 }
4065#endif
4066
4067 if (ecb_expect_false (loop_done))
4068 break;
4069
4070 /* we might have forked, so reify kernel state if necessary */
4071 if (ecb_expect_false (postfork))
851 loop_fork (EV_A); 4072 loop_fork (EV_A);
852 4073
853 ev_io_stop (EV_A_ &sigev); 4074 /* update fd-related kernel structures */
854 close (sigpipe [0]); 4075 fd_reify (EV_A);
855 close (sigpipe [1]);
856 pipe (sigpipe);
857 4076
858 ev_ref (EV_A); /* signal watcher */ 4077 /* calculate blocking time */
859 siginit (EV_A); 4078 {
4079 ev_tstamp waittime = 0.;
4080 ev_tstamp sleeptime = 0.;
4081
4082 /* remember old timestamp for io_blocktime calculation */
4083 ev_tstamp prev_mn_now = mn_now;
4084
4085 /* update time to cancel out callback processing overhead */
4086 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
4087
4088 /* from now on, we want a pipe-wake-up */
4089 pipe_write_wanted = 1;
4090
4091 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
4092
4093 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
4094 {
4095 waittime = EV_TS_CONST (MAX_BLOCKTIME);
4096
4097 if (ecb_expect_true (have_monotonic))
4098 {
4099#if EV_USE_TIMERFD
4100 /* sleep a lot longer when we can reliably detect timejumps */
4101 if (ecb_expect_true (timerfd != -1))
4102 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4103#endif
4104#if !EV_PERIODIC_ENABLE
4105 /* without periodics but with monotonic clock there is no need */
4106 /* for any time jump detection, so sleep longer */
4107 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4108#endif
4109 }
4110
4111 if (timercnt)
4112 {
4113 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
4114 if (waittime > to) waittime = to;
4115 }
4116
4117#if EV_PERIODIC_ENABLE
4118 if (periodiccnt)
4119 {
4120 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
4121 if (waittime > to) waittime = to;
4122 }
4123#endif
4124
4125 /* don't let timeouts decrease the waittime below timeout_blocktime */
4126 if (ecb_expect_false (waittime < timeout_blocktime))
4127 waittime = timeout_blocktime;
4128
4129 /* now there are two more special cases left, either we have
4130 * already-expired timers, so we should not sleep, or we have timers
4131 * that expire very soon, in which case we need to wait for a minimum
4132 * amount of time for some event loop backends.
4133 */
4134 if (ecb_expect_false (waittime < backend_mintime))
4135 waittime = waittime <= EV_TS_CONST (0.)
4136 ? EV_TS_CONST (0.)
4137 : backend_mintime;
4138
4139 /* extra check because io_blocktime is commonly 0 */
4140 if (ecb_expect_false (io_blocktime))
4141 {
4142 sleeptime = io_blocktime - (mn_now - prev_mn_now);
4143
4144 if (sleeptime > waittime - backend_mintime)
4145 sleeptime = waittime - backend_mintime;
4146
4147 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
4148 {
4149 ev_sleep (sleeptime);
4150 waittime -= sleeptime;
4151 }
4152 }
4153 }
4154
4155#if EV_FEATURE_API
4156 ++loop_count;
4157#endif
4158 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
4159 backend_poll (EV_A_ waittime);
4160 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
4161
4162 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
4163
4164 ECB_MEMORY_FENCE_ACQUIRE;
4165 if (pipe_write_skipped)
4166 {
4167 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
4168 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
4169 }
4170
4171 /* update ev_rt_now, do magic */
4172 time_update (EV_A_ waittime + sleeptime);
4173 }
4174
4175 /* queue pending timers and reschedule them */
4176 timers_reify (EV_A); /* relative timers called last */
4177#if EV_PERIODIC_ENABLE
4178 periodics_reify (EV_A); /* absolute timers called first */
4179#endif
4180
4181#if EV_IDLE_ENABLE
4182 /* queue idle watchers unless other events are pending */
4183 idle_reify (EV_A);
4184#endif
4185
4186#if EV_CHECK_ENABLE
4187 /* queue check watchers, to be executed first */
4188 if (ecb_expect_false (checkcnt))
4189 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
4190#endif
4191
4192 EV_INVOKE_PENDING;
4193 }
4194 while (ecb_expect_true (
4195 activecnt
4196 && !loop_done
4197 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
4198 ));
4199
4200 if (loop_done == EVBREAK_ONE)
4201 loop_done = EVBREAK_CANCEL;
4202
4203#if EV_FEATURE_API
4204 --loop_depth;
4205#endif
4206
4207 return activecnt;
4208}
4209
4210void
4211ev_break (EV_P_ int how) EV_NOEXCEPT
4212{
4213 loop_done = how;
4214}
4215
4216void
4217ev_ref (EV_P) EV_NOEXCEPT
4218{
4219 ++activecnt;
4220}
4221
4222void
4223ev_unref (EV_P) EV_NOEXCEPT
4224{
4225 --activecnt;
4226}
4227
4228void
4229ev_now_update (EV_P) EV_NOEXCEPT
4230{
4231 time_update (EV_A_ EV_TSTAMP_HUGE);
4232}
4233
4234void
4235ev_suspend (EV_P) EV_NOEXCEPT
4236{
4237 ev_now_update (EV_A);
4238}
4239
4240void
4241ev_resume (EV_P) EV_NOEXCEPT
4242{
4243 ev_tstamp mn_prev = mn_now;
4244
4245 ev_now_update (EV_A);
4246 timers_reschedule (EV_A_ mn_now - mn_prev);
4247#if EV_PERIODIC_ENABLE
4248 /* TODO: really do this? */
4249 periodics_reschedule (EV_A);
4250#endif
860} 4251}
861 4252
862/*****************************************************************************/ 4253/*****************************************************************************/
4254/* singly-linked list management, used when the expected list length is short */
863 4255
864static void 4256inline_size void
4257wlist_add (WL *head, WL elem)
4258{
4259 elem->next = *head;
4260 *head = elem;
4261}
4262
4263inline_size void
4264wlist_del (WL *head, WL elem)
4265{
4266 while (*head)
4267 {
4268 if (ecb_expect_true (*head == elem))
4269 {
4270 *head = elem->next;
4271 break;
4272 }
4273
4274 head = &(*head)->next;
4275 }
4276}
4277
4278/* internal, faster, version of ev_clear_pending */
4279inline_speed void
865call_pending (EV_P) 4280clear_pending (EV_P_ W w)
866{ 4281{
867 int pri; 4282 if (w->pending)
4283 {
4284 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
4285 w->pending = 0;
4286 }
4287}
868 4288
869 for (pri = NUMPRI; pri--; ) 4289int
870 while (pendingcnt [pri]) 4290ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
4291{
4292 W w_ = (W)w;
4293 int pending = w_->pending;
4294
4295 if (ecb_expect_true (pending))
4296 {
4297 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
4298 p->w = (W)&pending_w;
4299 w_->pending = 0;
4300 return p->events;
4301 }
4302 else
4303 return 0;
4304}
4305
4306inline_size void
4307pri_adjust (EV_P_ W w)
4308{
4309 int pri = ev_priority (w);
4310 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
4311 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
4312 ev_set_priority (w, pri);
4313}
4314
4315inline_speed void
4316ev_start (EV_P_ W w, int active)
4317{
4318 pri_adjust (EV_A_ w);
4319 w->active = active;
4320 ev_ref (EV_A);
4321}
4322
4323inline_size void
4324ev_stop (EV_P_ W w)
4325{
4326 ev_unref (EV_A);
4327 w->active = 0;
4328}
4329
4330/*****************************************************************************/
4331
4332ecb_noinline
4333void
4334ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
4335{
4336 int fd = w->fd;
4337
4338 if (ecb_expect_false (ev_is_active (w)))
4339 return;
4340
4341 assert (("libev: ev_io_start called with negative fd", fd >= 0));
4342 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
4343
4344#if EV_VERIFY >= 2
4345 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4346#endif
4347 EV_FREQUENT_CHECK;
4348
4349 ev_start (EV_A_ (W)w, 1);
4350 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
4351 wlist_add (&anfds[fd].head, (WL)w);
4352
4353 /* common bug, apparently */
4354 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
4355
4356 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
4357 w->events &= ~EV__IOFDSET;
4358
4359 EV_FREQUENT_CHECK;
4360}
4361
4362ecb_noinline
4363void
4364ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
4365{
4366 clear_pending (EV_A_ (W)w);
4367 if (ecb_expect_false (!ev_is_active (w)))
4368 return;
4369
4370 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
4371
4372#if EV_VERIFY >= 2
4373 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4374#endif
4375 EV_FREQUENT_CHECK;
4376
4377 wlist_del (&anfds[w->fd].head, (WL)w);
4378 ev_stop (EV_A_ (W)w);
4379
4380 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
4381
4382 EV_FREQUENT_CHECK;
4383}
4384
4385ecb_noinline
4386void
4387ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
4388{
4389 if (ecb_expect_false (ev_is_active (w)))
4390 return;
4391
4392 ev_at (w) += mn_now;
4393
4394 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
4395
4396 EV_FREQUENT_CHECK;
4397
4398 ++timercnt;
4399 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
4400 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
4401 ANHE_w (timers [ev_active (w)]) = (WT)w;
4402 ANHE_at_cache (timers [ev_active (w)]);
4403 upheap (timers, ev_active (w));
4404
4405 EV_FREQUENT_CHECK;
4406
4407 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
4408}
4409
4410ecb_noinline
4411void
4412ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
4413{
4414 clear_pending (EV_A_ (W)w);
4415 if (ecb_expect_false (!ev_is_active (w)))
4416 return;
4417
4418 EV_FREQUENT_CHECK;
4419
4420 {
4421 int active = ev_active (w);
4422
4423 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
4424
4425 --timercnt;
4426
4427 if (ecb_expect_true (active < timercnt + HEAP0))
871 { 4428 {
872 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 4429 timers [active] = timers [timercnt + HEAP0];
873 4430 adjustheap (timers, timercnt, active);
874 if (p->w)
875 {
876 p->w->pending = 0;
877 p->w->cb (EV_A_ p->w, p->events);
878 }
879 } 4431 }
880} 4432 }
881 4433
882static void 4434 ev_at (w) -= mn_now;
883timers_reify (EV_P)
884{
885 while (timercnt && ((WT)timers [0])->at <= mn_now)
886 {
887 struct ev_timer *w = timers [0];
888 4435
889 assert (("inactive timer on timer heap detected", ev_is_active (w))); 4436 ev_stop (EV_A_ (W)w);
890 4437
891 /* first reschedule or stop timer */ 4438 EV_FREQUENT_CHECK;
4439}
4440
4441ecb_noinline
4442void
4443ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
4444{
4445 EV_FREQUENT_CHECK;
4446
4447 clear_pending (EV_A_ (W)w);
4448
4449 if (ev_is_active (w))
4450 {
892 if (w->repeat) 4451 if (w->repeat)
893 { 4452 {
894 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
895 ((WT)w)->at = mn_now + w->repeat; 4453 ev_at (w) = mn_now + w->repeat;
896 downheap ((WT *)timers, timercnt, 0); 4454 ANHE_at_cache (timers [ev_active (w)]);
897 } 4455 adjustheap (timers, timercnt, ev_active (w));
898 else
899 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
900
901 event (EV_A_ (W)w, EV_TIMEOUT);
902 }
903}
904
905static void
906periodics_reify (EV_P)
907{
908 while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
909 {
910 struct ev_periodic *w = periodics [0];
911
912 assert (("inactive timer on periodic heap detected", ev_is_active (w)));
913
914 /* first reschedule or stop timer */
915 if (w->interval)
916 {
917 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
918 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
919 downheap ((WT *)periodics, periodiccnt, 0);
920 }
921 else
922 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
923
924 event (EV_A_ (W)w, EV_PERIODIC);
925 }
926}
927
928static void
929periodics_reschedule (EV_P)
930{
931 int i;
932
933 /* adjust periodics after time jump */
934 for (i = 0; i < periodiccnt; ++i)
935 {
936 struct ev_periodic *w = periodics [i];
937
938 if (w->interval)
939 {
940 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
941
942 if (fabs (diff) >= 1e-4)
943 {
944 ev_periodic_stop (EV_A_ w);
945 ev_periodic_start (EV_A_ w);
946
947 i = 0; /* restart loop, inefficient, but time jumps should be rare */
948 }
949 }
950 }
951}
952
953inline int
954time_update_monotonic (EV_P)
955{
956 mn_now = get_clock ();
957
958 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
959 {
960 rt_now = rtmn_diff + mn_now;
961 return 0;
962 }
963 else
964 {
965 now_floor = mn_now;
966 rt_now = ev_time ();
967 return 1;
968 }
969}
970
971static void
972time_update (EV_P)
973{
974 int i;
975
976#if EV_USE_MONOTONIC
977 if (expect_true (have_monotonic))
978 {
979 if (time_update_monotonic (EV_A))
980 {
981 ev_tstamp odiff = rtmn_diff;
982
983 for (i = 4; --i; ) /* loop a few times, before making important decisions */
984 {
985 rtmn_diff = rt_now - mn_now;
986
987 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
988 return; /* all is well */
989
990 rt_now = ev_time ();
991 mn_now = get_clock ();
992 now_floor = mn_now;
993 }
994
995 periodics_reschedule (EV_A);
996 /* no timer adjustment, as the monotonic clock doesn't jump */
997 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
998 }
999 }
1000 else
1001#endif
1002 {
1003 rt_now = ev_time ();
1004
1005 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1006 {
1007 periodics_reschedule (EV_A);
1008
1009 /* adjust timers. this is easy, as the offset is the same for all */
1010 for (i = 0; i < timercnt; ++i)
1011 ((WT)timers [i])->at += rt_now - mn_now;
1012 }
1013
1014 mn_now = rt_now;
1015 }
1016}
1017
1018void
1019ev_ref (EV_P)
1020{
1021 ++activecnt;
1022}
1023
1024void
1025ev_unref (EV_P)
1026{
1027 --activecnt;
1028}
1029
1030static int loop_done;
1031
1032void
1033ev_loop (EV_P_ int flags)
1034{
1035 double block;
1036 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1037
1038 do
1039 {
1040 /* queue check watchers (and execute them) */
1041 if (expect_false (preparecnt))
1042 {
1043 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1044 call_pending (EV_A);
1045 }
1046
1047 /* update fd-related kernel structures */
1048 fd_reify (EV_A);
1049
1050 /* calculate blocking time */
1051
1052 /* we only need this for !monotonic clockor timers, but as we basically
1053 always have timers, we just calculate it always */
1054#if EV_USE_MONOTONIC
1055 if (expect_true (have_monotonic))
1056 time_update_monotonic (EV_A);
1057 else
1058#endif
1059 {
1060 rt_now = ev_time ();
1061 mn_now = rt_now;
1062 }
1063
1064 if (flags & EVLOOP_NONBLOCK || idlecnt)
1065 block = 0.;
1066 else
1067 {
1068 block = MAX_BLOCKTIME;
1069
1070 if (timercnt)
1071 {
1072 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
1073 if (block > to) block = to;
1074 }
1075
1076 if (periodiccnt)
1077 {
1078 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
1079 if (block > to) block = to;
1080 }
1081
1082 if (block < 0.) block = 0.;
1083 }
1084
1085 method_poll (EV_A_ block);
1086
1087 /* update rt_now, do magic */
1088 time_update (EV_A);
1089
1090 /* queue pending timers and reschedule them */
1091 timers_reify (EV_A); /* relative timers called last */
1092 periodics_reify (EV_A); /* absolute timers called first */
1093
1094 /* queue idle watchers unless io or timers are pending */
1095 if (!pendingcnt)
1096 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
1097
1098 /* queue check watchers, to be executed first */
1099 if (checkcnt)
1100 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1101
1102 call_pending (EV_A);
1103 }
1104 while (activecnt && !loop_done);
1105
1106 if (loop_done != 2)
1107 loop_done = 0;
1108}
1109
1110void
1111ev_unloop (EV_P_ int how)
1112{
1113 loop_done = how;
1114}
1115
1116/*****************************************************************************/
1117
1118inline void
1119wlist_add (WL *head, WL elem)
1120{
1121 elem->next = *head;
1122 *head = elem;
1123}
1124
1125inline void
1126wlist_del (WL *head, WL elem)
1127{
1128 while (*head)
1129 {
1130 if (*head == elem)
1131 {
1132 *head = elem->next;
1133 return;
1134 }
1135
1136 head = &(*head)->next;
1137 }
1138}
1139
1140inline void
1141ev_clear_pending (EV_P_ W w)
1142{
1143 if (w->pending)
1144 {
1145 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1146 w->pending = 0;
1147 }
1148}
1149
1150inline void
1151ev_start (EV_P_ W w, int active)
1152{
1153 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
1154 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1155
1156 w->active = active;
1157 ev_ref (EV_A);
1158}
1159
1160inline void
1161ev_stop (EV_P_ W w)
1162{
1163 ev_unref (EV_A);
1164 w->active = 0;
1165}
1166
1167/*****************************************************************************/
1168
1169void
1170ev_io_start (EV_P_ struct ev_io *w)
1171{
1172 int fd = w->fd;
1173
1174 if (ev_is_active (w))
1175 return;
1176
1177 assert (("ev_io_start called with negative fd", fd >= 0));
1178
1179 ev_start (EV_A_ (W)w, 1);
1180 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
1181 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1182
1183 fd_change (EV_A_ fd);
1184}
1185
1186void
1187ev_io_stop (EV_P_ struct ev_io *w)
1188{
1189 ev_clear_pending (EV_A_ (W)w);
1190 if (!ev_is_active (w))
1191 return;
1192
1193 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1194 ev_stop (EV_A_ (W)w);
1195
1196 fd_change (EV_A_ w->fd);
1197}
1198
1199void
1200ev_timer_start (EV_P_ struct ev_timer *w)
1201{
1202 if (ev_is_active (w))
1203 return;
1204
1205 ((WT)w)->at += mn_now;
1206
1207 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1208
1209 ev_start (EV_A_ (W)w, ++timercnt);
1210 array_needsize (timers, timermax, timercnt, );
1211 timers [timercnt - 1] = w;
1212 upheap ((WT *)timers, timercnt - 1);
1213
1214 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1215}
1216
1217void
1218ev_timer_stop (EV_P_ struct ev_timer *w)
1219{
1220 ev_clear_pending (EV_A_ (W)w);
1221 if (!ev_is_active (w))
1222 return;
1223
1224 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1225
1226 if (((W)w)->active < timercnt--)
1227 {
1228 timers [((W)w)->active - 1] = timers [timercnt];
1229 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1230 }
1231
1232 ((WT)w)->at = w->repeat;
1233
1234 ev_stop (EV_A_ (W)w);
1235}
1236
1237void
1238ev_timer_again (EV_P_ struct ev_timer *w)
1239{
1240 if (ev_is_active (w))
1241 {
1242 if (w->repeat)
1243 {
1244 ((WT)w)->at = mn_now + w->repeat;
1245 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1246 } 4456 }
1247 else 4457 else
1248 ev_timer_stop (EV_A_ w); 4458 ev_timer_stop (EV_A_ w);
1249 } 4459 }
1250 else if (w->repeat) 4460 else if (w->repeat)
4461 {
4462 ev_at (w) = w->repeat;
1251 ev_timer_start (EV_A_ w); 4463 ev_timer_start (EV_A_ w);
1252} 4464 }
1253 4465
4466 EV_FREQUENT_CHECK;
4467}
4468
4469ev_tstamp
4470ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4471{
4472 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
4473}
4474
4475#if EV_PERIODIC_ENABLE
4476ecb_noinline
1254void 4477void
1255ev_periodic_start (EV_P_ struct ev_periodic *w) 4478ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
1256{ 4479{
1257 if (ev_is_active (w)) 4480 if (ecb_expect_false (ev_is_active (w)))
1258 return; 4481 return;
1259 4482
4483#if EV_USE_TIMERFD
4484 if (timerfd == -2)
4485 evtimerfd_init (EV_A);
4486#endif
4487
4488 if (w->reschedule_cb)
4489 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
4490 else if (w->interval)
4491 {
1260 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4492 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
4493 periodic_recalc (EV_A_ w);
4494 }
4495 else
4496 ev_at (w) = w->offset;
1261 4497
1262 /* this formula differs from the one in periodic_reify because we do not always round up */ 4498 EV_FREQUENT_CHECK;
1263 if (w->interval)
1264 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1265 4499
4500 ++periodiccnt;
1266 ev_start (EV_A_ (W)w, ++periodiccnt); 4501 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1267 array_needsize (periodics, periodicmax, periodiccnt, ); 4502 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
1268 periodics [periodiccnt - 1] = w; 4503 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1269 upheap ((WT *)periodics, periodiccnt - 1); 4504 ANHE_at_cache (periodics [ev_active (w)]);
4505 upheap (periodics, ev_active (w));
1270 4506
4507 EV_FREQUENT_CHECK;
4508
1271 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 4509 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1272} 4510}
1273 4511
4512ecb_noinline
1274void 4513void
1275ev_periodic_stop (EV_P_ struct ev_periodic *w) 4514ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
1276{ 4515{
1277 ev_clear_pending (EV_A_ (W)w); 4516 clear_pending (EV_A_ (W)w);
1278 if (!ev_is_active (w)) 4517 if (ecb_expect_false (!ev_is_active (w)))
1279 return; 4518 return;
1280 4519
4520 EV_FREQUENT_CHECK;
4521
4522 {
4523 int active = ev_active (w);
4524
1281 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 4525 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1282 4526
1283 if (((W)w)->active < periodiccnt--) 4527 --periodiccnt;
4528
4529 if (ecb_expect_true (active < periodiccnt + HEAP0))
1284 { 4530 {
1285 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 4531 periodics [active] = periodics [periodiccnt + HEAP0];
1286 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 4532 adjustheap (periodics, periodiccnt, active);
1287 } 4533 }
4534 }
1288 4535
1289 ev_stop (EV_A_ (W)w); 4536 ev_stop (EV_A_ (W)w);
1290}
1291 4537
4538 EV_FREQUENT_CHECK;
4539}
4540
4541ecb_noinline
1292void 4542void
1293ev_idle_start (EV_P_ struct ev_idle *w) 4543ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
1294{ 4544{
1295 if (ev_is_active (w)) 4545 /* TODO: use adjustheap and recalculation */
1296 return;
1297
1298 ev_start (EV_A_ (W)w, ++idlecnt);
1299 array_needsize (idles, idlemax, idlecnt, );
1300 idles [idlecnt - 1] = w;
1301}
1302
1303void
1304ev_idle_stop (EV_P_ struct ev_idle *w)
1305{
1306 ev_clear_pending (EV_A_ (W)w);
1307 if (ev_is_active (w))
1308 return;
1309
1310 idles [((W)w)->active - 1] = idles [--idlecnt];
1311 ev_stop (EV_A_ (W)w); 4546 ev_periodic_stop (EV_A_ w);
4547 ev_periodic_start (EV_A_ w);
1312} 4548}
1313 4549#endif
1314void
1315ev_prepare_start (EV_P_ struct ev_prepare *w)
1316{
1317 if (ev_is_active (w))
1318 return;
1319
1320 ev_start (EV_A_ (W)w, ++preparecnt);
1321 array_needsize (prepares, preparemax, preparecnt, );
1322 prepares [preparecnt - 1] = w;
1323}
1324
1325void
1326ev_prepare_stop (EV_P_ struct ev_prepare *w)
1327{
1328 ev_clear_pending (EV_A_ (W)w);
1329 if (ev_is_active (w))
1330 return;
1331
1332 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1333 ev_stop (EV_A_ (W)w);
1334}
1335
1336void
1337ev_check_start (EV_P_ struct ev_check *w)
1338{
1339 if (ev_is_active (w))
1340 return;
1341
1342 ev_start (EV_A_ (W)w, ++checkcnt);
1343 array_needsize (checks, checkmax, checkcnt, );
1344 checks [checkcnt - 1] = w;
1345}
1346
1347void
1348ev_check_stop (EV_P_ struct ev_check *w)
1349{
1350 ev_clear_pending (EV_A_ (W)w);
1351 if (ev_is_active (w))
1352 return;
1353
1354 checks [((W)w)->active - 1] = checks [--checkcnt];
1355 ev_stop (EV_A_ (W)w);
1356}
1357 4550
1358#ifndef SA_RESTART 4551#ifndef SA_RESTART
1359# define SA_RESTART 0 4552# define SA_RESTART 0
1360#endif 4553#endif
1361 4554
4555#if EV_SIGNAL_ENABLE
4556
4557ecb_noinline
1362void 4558void
1363ev_signal_start (EV_P_ struct ev_signal *w) 4559ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
1364{ 4560{
4561 if (ecb_expect_false (ev_is_active (w)))
4562 return;
4563
4564 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4565
1365#if EV_MULTIPLICITY 4566#if EV_MULTIPLICITY
1366 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 4567 assert (("libev: a signal must not be attached to two different loops",
4568 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
4569
4570 signals [w->signum - 1].loop = EV_A;
4571 ECB_MEMORY_FENCE_RELEASE;
4572#endif
4573
4574 EV_FREQUENT_CHECK;
4575
4576#if EV_USE_SIGNALFD
4577 if (sigfd == -2)
4578 {
4579 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
4580 if (sigfd < 0 && errno == EINVAL)
4581 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
4582
4583 if (sigfd >= 0)
4584 {
4585 fd_intern (sigfd); /* doing it twice will not hurt */
4586
4587 sigemptyset (&sigfd_set);
4588
4589 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4590 ev_set_priority (&sigfd_w, EV_MAXPRI);
4591 ev_io_start (EV_A_ &sigfd_w);
4592 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4593 }
4594 }
4595
4596 if (sigfd >= 0)
4597 {
4598 /* TODO: check .head */
4599 sigaddset (&sigfd_set, w->signum);
4600 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4601
4602 signalfd (sigfd, &sigfd_set, 0);
4603 }
4604#endif
4605
4606 ev_start (EV_A_ (W)w, 1);
4607 wlist_add (&signals [w->signum - 1].head, (WL)w);
4608
4609 if (!((WL)w)->next)
4610# if EV_USE_SIGNALFD
4611 if (sigfd < 0) /*TODO*/
1367#endif 4612# endif
1368 if (ev_is_active (w)) 4613 {
4614# ifdef _WIN32
4615 evpipe_init (EV_A);
4616
4617 signal (w->signum, ev_sighandler);
4618# else
4619 struct sigaction sa;
4620
4621 evpipe_init (EV_A);
4622
4623 sa.sa_handler = ev_sighandler;
4624 sigfillset (&sa.sa_mask);
4625 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
4626 sigaction (w->signum, &sa, 0);
4627
4628 if (origflags & EVFLAG_NOSIGMASK)
4629 {
4630 sigemptyset (&sa.sa_mask);
4631 sigaddset (&sa.sa_mask, w->signum);
4632 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4633 }
4634#endif
4635 }
4636
4637 EV_FREQUENT_CHECK;
4638}
4639
4640ecb_noinline
4641void
4642ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
4643{
4644 clear_pending (EV_A_ (W)w);
4645 if (ecb_expect_false (!ev_is_active (w)))
1369 return; 4646 return;
1370 4647
1371 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4648 EV_FREQUENT_CHECK;
4649
4650 wlist_del (&signals [w->signum - 1].head, (WL)w);
4651 ev_stop (EV_A_ (W)w);
4652
4653 if (!signals [w->signum - 1].head)
4654 {
4655#if EV_MULTIPLICITY
4656 signals [w->signum - 1].loop = 0; /* unattach from signal */
4657#endif
4658#if EV_USE_SIGNALFD
4659 if (sigfd >= 0)
4660 {
4661 sigset_t ss;
4662
4663 sigemptyset (&ss);
4664 sigaddset (&ss, w->signum);
4665 sigdelset (&sigfd_set, w->signum);
4666
4667 signalfd (sigfd, &sigfd_set, 0);
4668 sigprocmask (SIG_UNBLOCK, &ss, 0);
4669 }
4670 else
4671#endif
4672 signal (w->signum, SIG_DFL);
4673 }
4674
4675 EV_FREQUENT_CHECK;
4676}
4677
4678#endif
4679
4680#if EV_CHILD_ENABLE
4681
4682void
4683ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4684{
4685#if EV_MULTIPLICITY
4686 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
4687#endif
4688 if (ecb_expect_false (ev_is_active (w)))
4689 return;
4690
4691 EV_FREQUENT_CHECK;
1372 4692
1373 ev_start (EV_A_ (W)w, 1); 4693 ev_start (EV_A_ (W)w, 1);
1374 array_needsize (signals, signalmax, w->signum, signals_init); 4694 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1375 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1376 4695
1377 if (!((WL)w)->next) 4696 EV_FREQUENT_CHECK;
4697}
4698
4699void
4700ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
4701{
4702 clear_pending (EV_A_ (W)w);
4703 if (ecb_expect_false (!ev_is_active (w)))
4704 return;
4705
4706 EV_FREQUENT_CHECK;
4707
4708 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4709 ev_stop (EV_A_ (W)w);
4710
4711 EV_FREQUENT_CHECK;
4712}
4713
4714#endif
4715
4716#if EV_STAT_ENABLE
4717
4718# ifdef _WIN32
4719# undef lstat
4720# define lstat(a,b) _stati64 (a,b)
4721# endif
4722
4723#define DEF_STAT_INTERVAL 5.0074891
4724#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
4725#define MIN_STAT_INTERVAL 0.1074891
4726
4727ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
4728
4729#if EV_USE_INOTIFY
4730
4731/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4732# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4733
4734ecb_noinline
4735static void
4736infy_add (EV_P_ ev_stat *w)
4737{
4738 w->wd = inotify_add_watch (fs_fd, w->path,
4739 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4740 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4741 | IN_DONT_FOLLOW | IN_MASK_ADD);
4742
4743 if (w->wd >= 0)
4744 {
4745 struct statfs sfs;
4746
4747 /* now local changes will be tracked by inotify, but remote changes won't */
4748 /* unless the filesystem is known to be local, we therefore still poll */
4749 /* also do poll on <2.6.25, but with normal frequency */
4750
4751 if (!fs_2625)
4752 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4753 else if (!statfs (w->path, &sfs)
4754 && (sfs.f_type == 0x1373 /* devfs */
4755 || sfs.f_type == 0x4006 /* fat */
4756 || sfs.f_type == 0x4d44 /* msdos */
4757 || sfs.f_type == 0xEF53 /* ext2/3 */
4758 || sfs.f_type == 0x72b6 /* jffs2 */
4759 || sfs.f_type == 0x858458f6 /* ramfs */
4760 || sfs.f_type == 0x5346544e /* ntfs */
4761 || sfs.f_type == 0x3153464a /* jfs */
4762 || sfs.f_type == 0x9123683e /* btrfs */
4763 || sfs.f_type == 0x52654973 /* reiser3 */
4764 || sfs.f_type == 0x01021994 /* tmpfs */
4765 || sfs.f_type == 0x58465342 /* xfs */))
4766 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4767 else
4768 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1378 { 4769 }
1379#if WIN32 4770 else
1380 signal (w->signum, sighandler); 4771 {
4772 /* can't use inotify, continue to stat */
4773 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4774
4775 /* if path is not there, monitor some parent directory for speedup hints */
4776 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4777 /* but an efficiency issue only */
4778 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4779 {
4780 char path [4096];
4781 strcpy (path, w->path);
4782
4783 do
4784 {
4785 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4786 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4787
4788 char *pend = strrchr (path, '/');
4789
4790 if (!pend || pend == path)
4791 break;
4792
4793 *pend = 0;
4794 w->wd = inotify_add_watch (fs_fd, path, mask);
4795 }
4796 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4797 }
4798 }
4799
4800 if (w->wd >= 0)
4801 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4802
4803 /* now re-arm timer, if required */
4804 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4805 ev_timer_again (EV_A_ &w->timer);
4806 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4807}
4808
4809ecb_noinline
4810static void
4811infy_del (EV_P_ ev_stat *w)
4812{
4813 int slot;
4814 int wd = w->wd;
4815
4816 if (wd < 0)
4817 return;
4818
4819 w->wd = -2;
4820 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4821 wlist_del (&fs_hash [slot].head, (WL)w);
4822
4823 /* remove this watcher, if others are watching it, they will rearm */
4824 inotify_rm_watch (fs_fd, wd);
4825}
4826
4827ecb_noinline
4828static void
4829infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4830{
4831 if (slot < 0)
4832 /* overflow, need to check for all hash slots */
4833 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4834 infy_wd (EV_A_ slot, wd, ev);
4835 else
4836 {
4837 WL w_;
4838
4839 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4840 {
4841 ev_stat *w = (ev_stat *)w_;
4842 w_ = w_->next; /* lets us remove this watcher and all before it */
4843
4844 if (w->wd == wd || wd == -1)
4845 {
4846 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4847 {
4848 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4849 w->wd = -1;
4850 infy_add (EV_A_ w); /* re-add, no matter what */
4851 }
4852
4853 stat_timer_cb (EV_A_ &w->timer, 0);
4854 }
4855 }
4856 }
4857}
4858
4859static void
4860infy_cb (EV_P_ ev_io *w, int revents)
4861{
4862 char buf [EV_INOTIFY_BUFSIZE];
4863 int ofs;
4864 int len = read (fs_fd, buf, sizeof (buf));
4865
4866 for (ofs = 0; ofs < len; )
4867 {
4868 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4869 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4870 ofs += sizeof (struct inotify_event) + ev->len;
4871 }
4872}
4873
4874inline_size ecb_cold
4875void
4876ev_check_2625 (EV_P)
4877{
4878 /* kernels < 2.6.25 are borked
4879 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4880 */
4881 if (ev_linux_version () < 0x020619)
4882 return;
4883
4884 fs_2625 = 1;
4885}
4886
4887inline_size int
4888infy_newfd (void)
4889{
4890#if defined IN_CLOEXEC && defined IN_NONBLOCK
4891 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4892 if (fd >= 0)
4893 return fd;
4894#endif
4895 return inotify_init ();
4896}
4897
4898inline_size void
4899infy_init (EV_P)
4900{
4901 if (fs_fd != -2)
4902 return;
4903
4904 fs_fd = -1;
4905
4906 ev_check_2625 (EV_A);
4907
4908 fs_fd = infy_newfd ();
4909
4910 if (fs_fd >= 0)
4911 {
4912 fd_intern (fs_fd);
4913 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4914 ev_set_priority (&fs_w, EV_MAXPRI);
4915 ev_io_start (EV_A_ &fs_w);
4916 ev_unref (EV_A);
4917 }
4918}
4919
4920inline_size void
4921infy_fork (EV_P)
4922{
4923 int slot;
4924
4925 if (fs_fd < 0)
4926 return;
4927
4928 ev_ref (EV_A);
4929 ev_io_stop (EV_A_ &fs_w);
4930 close (fs_fd);
4931 fs_fd = infy_newfd ();
4932
4933 if (fs_fd >= 0)
4934 {
4935 fd_intern (fs_fd);
4936 ev_io_set (&fs_w, fs_fd, EV_READ);
4937 ev_io_start (EV_A_ &fs_w);
4938 ev_unref (EV_A);
4939 }
4940
4941 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4942 {
4943 WL w_ = fs_hash [slot].head;
4944 fs_hash [slot].head = 0;
4945
4946 while (w_)
4947 {
4948 ev_stat *w = (ev_stat *)w_;
4949 w_ = w_->next; /* lets us add this watcher */
4950
4951 w->wd = -1;
4952
4953 if (fs_fd >= 0)
4954 infy_add (EV_A_ w); /* re-add, no matter what */
4955 else
4956 {
4957 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4958 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4959 ev_timer_again (EV_A_ &w->timer);
4960 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4961 }
4962 }
4963 }
4964}
4965
4966#endif
4967
4968#ifdef _WIN32
4969# define EV_LSTAT(p,b) _stati64 (p, b)
1381#else 4970#else
1382 struct sigaction sa; 4971# define EV_LSTAT(p,b) lstat (p, b)
1383 sa.sa_handler = sighandler;
1384 sigfillset (&sa.sa_mask);
1385 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1386 sigaction (w->signum, &sa, 0);
1387#endif 4972#endif
1388 }
1389}
1390 4973
1391void 4974void
1392ev_signal_stop (EV_P_ struct ev_signal *w) 4975ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
1393{ 4976{
1394 ev_clear_pending (EV_A_ (W)w); 4977 if (lstat (w->path, &w->attr) < 0)
1395 if (!ev_is_active (w)) 4978 w->attr.st_nlink = 0;
4979 else if (!w->attr.st_nlink)
4980 w->attr.st_nlink = 1;
4981}
4982
4983ecb_noinline
4984static void
4985stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4986{
4987 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4988
4989 ev_statdata prev = w->attr;
4990 ev_stat_stat (EV_A_ w);
4991
4992 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4993 if (
4994 prev.st_dev != w->attr.st_dev
4995 || prev.st_ino != w->attr.st_ino
4996 || prev.st_mode != w->attr.st_mode
4997 || prev.st_nlink != w->attr.st_nlink
4998 || prev.st_uid != w->attr.st_uid
4999 || prev.st_gid != w->attr.st_gid
5000 || prev.st_rdev != w->attr.st_rdev
5001 || prev.st_size != w->attr.st_size
5002 || prev.st_atime != w->attr.st_atime
5003 || prev.st_mtime != w->attr.st_mtime
5004 || prev.st_ctime != w->attr.st_ctime
5005 ) {
5006 /* we only update w->prev on actual differences */
5007 /* in case we test more often than invoke the callback, */
5008 /* to ensure that prev is always different to attr */
5009 w->prev = prev;
5010
5011 #if EV_USE_INOTIFY
5012 if (fs_fd >= 0)
5013 {
5014 infy_del (EV_A_ w);
5015 infy_add (EV_A_ w);
5016 ev_stat_stat (EV_A_ w); /* avoid race... */
5017 }
5018 #endif
5019
5020 ev_feed_event (EV_A_ w, EV_STAT);
5021 }
5022}
5023
5024void
5025ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
5026{
5027 if (ecb_expect_false (ev_is_active (w)))
1396 return; 5028 return;
1397 5029
1398 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 5030 ev_stat_stat (EV_A_ w);
5031
5032 if (w->interval < MIN_STAT_INTERVAL && w->interval)
5033 w->interval = MIN_STAT_INTERVAL;
5034
5035 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
5036 ev_set_priority (&w->timer, ev_priority (w));
5037
5038#if EV_USE_INOTIFY
5039 infy_init (EV_A);
5040
5041 if (fs_fd >= 0)
5042 infy_add (EV_A_ w);
5043 else
5044#endif
5045 {
5046 ev_timer_again (EV_A_ &w->timer);
5047 ev_unref (EV_A);
5048 }
5049
5050 ev_start (EV_A_ (W)w, 1);
5051
5052 EV_FREQUENT_CHECK;
5053}
5054
5055void
5056ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
5057{
5058 clear_pending (EV_A_ (W)w);
5059 if (ecb_expect_false (!ev_is_active (w)))
5060 return;
5061
5062 EV_FREQUENT_CHECK;
5063
5064#if EV_USE_INOTIFY
5065 infy_del (EV_A_ w);
5066#endif
5067
5068 if (ev_is_active (&w->timer))
5069 {
5070 ev_ref (EV_A);
5071 ev_timer_stop (EV_A_ &w->timer);
5072 }
5073
1399 ev_stop (EV_A_ (W)w); 5074 ev_stop (EV_A_ (W)w);
1400 5075
1401 if (!signals [w->signum - 1].head) 5076 EV_FREQUENT_CHECK;
1402 signal (w->signum, SIG_DFL);
1403} 5077}
5078#endif
1404 5079
5080#if EV_IDLE_ENABLE
1405void 5081void
1406ev_child_start (EV_P_ struct ev_child *w) 5082ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
1407{ 5083{
1408#if EV_MULTIPLICITY 5084 if (ecb_expect_false (ev_is_active (w)))
1409 assert (("child watchers are only supported in the default loop", loop == default_loop));
1410#endif
1411 if (ev_is_active (w))
1412 return; 5085 return;
1413 5086
5087 pri_adjust (EV_A_ (W)w);
5088
5089 EV_FREQUENT_CHECK;
5090
5091 {
5092 int active = ++idlecnt [ABSPRI (w)];
5093
5094 ++idleall;
5095 ev_start (EV_A_ (W)w, active);
5096
5097 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
5098 idles [ABSPRI (w)][active - 1] = w;
5099 }
5100
5101 EV_FREQUENT_CHECK;
5102}
5103
5104void
5105ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
5106{
5107 clear_pending (EV_A_ (W)w);
5108 if (ecb_expect_false (!ev_is_active (w)))
5109 return;
5110
5111 EV_FREQUENT_CHECK;
5112
5113 {
5114 int active = ev_active (w);
5115
5116 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
5117 ev_active (idles [ABSPRI (w)][active - 1]) = active;
5118
5119 ev_stop (EV_A_ (W)w);
5120 --idleall;
5121 }
5122
5123 EV_FREQUENT_CHECK;
5124}
5125#endif
5126
5127#if EV_PREPARE_ENABLE
5128void
5129ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
5130{
5131 if (ecb_expect_false (ev_is_active (w)))
5132 return;
5133
5134 EV_FREQUENT_CHECK;
5135
5136 ev_start (EV_A_ (W)w, ++preparecnt);
5137 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
5138 prepares [preparecnt - 1] = w;
5139
5140 EV_FREQUENT_CHECK;
5141}
5142
5143void
5144ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
5145{
5146 clear_pending (EV_A_ (W)w);
5147 if (ecb_expect_false (!ev_is_active (w)))
5148 return;
5149
5150 EV_FREQUENT_CHECK;
5151
5152 {
5153 int active = ev_active (w);
5154
5155 prepares [active - 1] = prepares [--preparecnt];
5156 ev_active (prepares [active - 1]) = active;
5157 }
5158
5159 ev_stop (EV_A_ (W)w);
5160
5161 EV_FREQUENT_CHECK;
5162}
5163#endif
5164
5165#if EV_CHECK_ENABLE
5166void
5167ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
5168{
5169 if (ecb_expect_false (ev_is_active (w)))
5170 return;
5171
5172 EV_FREQUENT_CHECK;
5173
5174 ev_start (EV_A_ (W)w, ++checkcnt);
5175 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
5176 checks [checkcnt - 1] = w;
5177
5178 EV_FREQUENT_CHECK;
5179}
5180
5181void
5182ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
5183{
5184 clear_pending (EV_A_ (W)w);
5185 if (ecb_expect_false (!ev_is_active (w)))
5186 return;
5187
5188 EV_FREQUENT_CHECK;
5189
5190 {
5191 int active = ev_active (w);
5192
5193 checks [active - 1] = checks [--checkcnt];
5194 ev_active (checks [active - 1]) = active;
5195 }
5196
5197 ev_stop (EV_A_ (W)w);
5198
5199 EV_FREQUENT_CHECK;
5200}
5201#endif
5202
5203#if EV_EMBED_ENABLE
5204ecb_noinline
5205void
5206ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
5207{
5208 ev_run (w->other, EVRUN_NOWAIT);
5209}
5210
5211static void
5212embed_io_cb (EV_P_ ev_io *io, int revents)
5213{
5214 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
5215
5216 if (ev_cb (w))
5217 ev_feed_event (EV_A_ (W)w, EV_EMBED);
5218 else
5219 ev_run (w->other, EVRUN_NOWAIT);
5220}
5221
5222static void
5223embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
5224{
5225 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
5226
5227 {
5228 EV_P = w->other;
5229
5230 while (fdchangecnt)
5231 {
5232 fd_reify (EV_A);
5233 ev_run (EV_A_ EVRUN_NOWAIT);
5234 }
5235 }
5236}
5237
5238#if EV_FORK_ENABLE
5239static void
5240embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
5241{
5242 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
5243
5244 ev_embed_stop (EV_A_ w);
5245
5246 {
5247 EV_P = w->other;
5248
5249 ev_loop_fork (EV_A);
5250 ev_run (EV_A_ EVRUN_NOWAIT);
5251 }
5252
5253 ev_embed_start (EV_A_ w);
5254}
5255#endif
5256
5257#if 0
5258static void
5259embed_idle_cb (EV_P_ ev_idle *idle, int revents)
5260{
5261 ev_idle_stop (EV_A_ idle);
5262}
5263#endif
5264
5265void
5266ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
5267{
5268 if (ecb_expect_false (ev_is_active (w)))
5269 return;
5270
5271 {
5272 EV_P = w->other;
5273 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
5274 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
5275 }
5276
5277 EV_FREQUENT_CHECK;
5278
5279 ev_set_priority (&w->io, ev_priority (w));
5280 ev_io_start (EV_A_ &w->io);
5281
5282 ev_prepare_init (&w->prepare, embed_prepare_cb);
5283 ev_set_priority (&w->prepare, EV_MINPRI);
5284 ev_prepare_start (EV_A_ &w->prepare);
5285
5286#if EV_FORK_ENABLE
5287 ev_fork_init (&w->fork, embed_fork_cb);
5288 ev_fork_start (EV_A_ &w->fork);
5289#endif
5290
5291 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
5292
1414 ev_start (EV_A_ (W)w, 1); 5293 ev_start (EV_A_ (W)w, 1);
1415 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 5294
5295 EV_FREQUENT_CHECK;
1416} 5296}
1417 5297
1418void 5298void
1419ev_child_stop (EV_P_ struct ev_child *w) 5299ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
1420{ 5300{
1421 ev_clear_pending (EV_A_ (W)w); 5301 clear_pending (EV_A_ (W)w);
1422 if (ev_is_active (w)) 5302 if (ecb_expect_false (!ev_is_active (w)))
1423 return; 5303 return;
1424 5304
1425 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 5305 EV_FREQUENT_CHECK;
5306
5307 ev_io_stop (EV_A_ &w->io);
5308 ev_prepare_stop (EV_A_ &w->prepare);
5309#if EV_FORK_ENABLE
5310 ev_fork_stop (EV_A_ &w->fork);
5311#endif
5312
1426 ev_stop (EV_A_ (W)w); 5313 ev_stop (EV_A_ (W)w);
5314
5315 EV_FREQUENT_CHECK;
1427} 5316}
5317#endif
5318
5319#if EV_FORK_ENABLE
5320void
5321ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
5322{
5323 if (ecb_expect_false (ev_is_active (w)))
5324 return;
5325
5326 EV_FREQUENT_CHECK;
5327
5328 ev_start (EV_A_ (W)w, ++forkcnt);
5329 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
5330 forks [forkcnt - 1] = w;
5331
5332 EV_FREQUENT_CHECK;
5333}
5334
5335void
5336ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
5337{
5338 clear_pending (EV_A_ (W)w);
5339 if (ecb_expect_false (!ev_is_active (w)))
5340 return;
5341
5342 EV_FREQUENT_CHECK;
5343
5344 {
5345 int active = ev_active (w);
5346
5347 forks [active - 1] = forks [--forkcnt];
5348 ev_active (forks [active - 1]) = active;
5349 }
5350
5351 ev_stop (EV_A_ (W)w);
5352
5353 EV_FREQUENT_CHECK;
5354}
5355#endif
5356
5357#if EV_CLEANUP_ENABLE
5358void
5359ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5360{
5361 if (ecb_expect_false (ev_is_active (w)))
5362 return;
5363
5364 EV_FREQUENT_CHECK;
5365
5366 ev_start (EV_A_ (W)w, ++cleanupcnt);
5367 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5368 cleanups [cleanupcnt - 1] = w;
5369
5370 /* cleanup watchers should never keep a refcount on the loop */
5371 ev_unref (EV_A);
5372 EV_FREQUENT_CHECK;
5373}
5374
5375void
5376ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5377{
5378 clear_pending (EV_A_ (W)w);
5379 if (ecb_expect_false (!ev_is_active (w)))
5380 return;
5381
5382 EV_FREQUENT_CHECK;
5383 ev_ref (EV_A);
5384
5385 {
5386 int active = ev_active (w);
5387
5388 cleanups [active - 1] = cleanups [--cleanupcnt];
5389 ev_active (cleanups [active - 1]) = active;
5390 }
5391
5392 ev_stop (EV_A_ (W)w);
5393
5394 EV_FREQUENT_CHECK;
5395}
5396#endif
5397
5398#if EV_ASYNC_ENABLE
5399void
5400ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
5401{
5402 if (ecb_expect_false (ev_is_active (w)))
5403 return;
5404
5405 w->sent = 0;
5406
5407 evpipe_init (EV_A);
5408
5409 EV_FREQUENT_CHECK;
5410
5411 ev_start (EV_A_ (W)w, ++asynccnt);
5412 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
5413 asyncs [asynccnt - 1] = w;
5414
5415 EV_FREQUENT_CHECK;
5416}
5417
5418void
5419ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
5420{
5421 clear_pending (EV_A_ (W)w);
5422 if (ecb_expect_false (!ev_is_active (w)))
5423 return;
5424
5425 EV_FREQUENT_CHECK;
5426
5427 {
5428 int active = ev_active (w);
5429
5430 asyncs [active - 1] = asyncs [--asynccnt];
5431 ev_active (asyncs [active - 1]) = active;
5432 }
5433
5434 ev_stop (EV_A_ (W)w);
5435
5436 EV_FREQUENT_CHECK;
5437}
5438
5439void
5440ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
5441{
5442 w->sent = 1;
5443 evpipe_write (EV_A_ &async_pending);
5444}
5445#endif
1428 5446
1429/*****************************************************************************/ 5447/*****************************************************************************/
1430 5448
1431struct ev_once 5449struct ev_once
1432{ 5450{
1433 struct ev_io io; 5451 ev_io io;
1434 struct ev_timer to; 5452 ev_timer to;
1435 void (*cb)(int revents, void *arg); 5453 void (*cb)(int revents, void *arg);
1436 void *arg; 5454 void *arg;
1437}; 5455};
1438 5456
1439static void 5457static void
1440once_cb (EV_P_ struct ev_once *once, int revents) 5458once_cb (EV_P_ struct ev_once *once, int revents)
1441{ 5459{
1442 void (*cb)(int revents, void *arg) = once->cb; 5460 void (*cb)(int revents, void *arg) = once->cb;
1443 void *arg = once->arg; 5461 void *arg = once->arg;
1444 5462
1445 ev_io_stop (EV_A_ &once->io); 5463 ev_io_stop (EV_A_ &once->io);
1446 ev_timer_stop (EV_A_ &once->to); 5464 ev_timer_stop (EV_A_ &once->to);
1447 ev_free (once); 5465 ev_free (once);
1448 5466
1449 cb (revents, arg); 5467 cb (revents, arg);
1450} 5468}
1451 5469
1452static void 5470static void
1453once_cb_io (EV_P_ struct ev_io *w, int revents) 5471once_cb_io (EV_P_ ev_io *w, int revents)
1454{ 5472{
1455 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 5473 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5474
5475 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1456} 5476}
1457 5477
1458static void 5478static void
1459once_cb_to (EV_P_ struct ev_timer *w, int revents) 5479once_cb_to (EV_P_ ev_timer *w, int revents)
1460{ 5480{
1461 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 5481 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
5482
5483 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1462} 5484}
1463 5485
1464void 5486void
1465ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5487ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
1466{ 5488{
1467 struct ev_once *once = ev_malloc (sizeof (struct ev_once)); 5489 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1468 5490
1469 if (!once)
1470 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1471 else
1472 {
1473 once->cb = cb; 5491 once->cb = cb;
1474 once->arg = arg; 5492 once->arg = arg;
1475 5493
1476 ev_watcher_init (&once->io, once_cb_io); 5494 ev_init (&once->io, once_cb_io);
1477 if (fd >= 0) 5495 if (fd >= 0)
5496 {
5497 ev_io_set (&once->io, fd, events);
5498 ev_io_start (EV_A_ &once->io);
5499 }
5500
5501 ev_init (&once->to, once_cb_to);
5502 if (timeout >= 0.)
5503 {
5504 ev_timer_set (&once->to, timeout, 0.);
5505 ev_timer_start (EV_A_ &once->to);
5506 }
5507}
5508
5509/*****************************************************************************/
5510
5511#if EV_WALK_ENABLE
5512ecb_cold
5513void
5514ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5515{
5516 int i, j;
5517 ev_watcher_list *wl, *wn;
5518
5519 if (types & (EV_IO | EV_EMBED))
5520 for (i = 0; i < anfdmax; ++i)
5521 for (wl = anfds [i].head; wl; )
1478 { 5522 {
1479 ev_io_set (&once->io, fd, events); 5523 wn = wl->next;
1480 ev_io_start (EV_A_ &once->io); 5524
5525#if EV_EMBED_ENABLE
5526 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5527 {
5528 if (types & EV_EMBED)
5529 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5530 }
5531 else
5532#endif
5533#if EV_USE_INOTIFY
5534 if (ev_cb ((ev_io *)wl) == infy_cb)
5535 ;
5536 else
5537#endif
5538 if ((ev_io *)wl != &pipe_w)
5539 if (types & EV_IO)
5540 cb (EV_A_ EV_IO, wl);
5541
5542 wl = wn;
1481 } 5543 }
1482 5544
1483 ev_watcher_init (&once->to, once_cb_to); 5545 if (types & (EV_TIMER | EV_STAT))
1484 if (timeout >= 0.) 5546 for (i = timercnt + HEAP0; i-- > HEAP0; )
5547#if EV_STAT_ENABLE
5548 /*TODO: timer is not always active*/
5549 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1485 { 5550 {
1486 ev_timer_set (&once->to, timeout, 0.); 5551 if (types & EV_STAT)
1487 ev_timer_start (EV_A_ &once->to); 5552 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1488 } 5553 }
1489 } 5554 else
1490} 5555#endif
5556 if (types & EV_TIMER)
5557 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1491 5558
5559#if EV_PERIODIC_ENABLE
5560 if (types & EV_PERIODIC)
5561 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5562 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5563#endif
5564
5565#if EV_IDLE_ENABLE
5566 if (types & EV_IDLE)
5567 for (j = NUMPRI; j--; )
5568 for (i = idlecnt [j]; i--; )
5569 cb (EV_A_ EV_IDLE, idles [j][i]);
5570#endif
5571
5572#if EV_FORK_ENABLE
5573 if (types & EV_FORK)
5574 for (i = forkcnt; i--; )
5575 if (ev_cb (forks [i]) != embed_fork_cb)
5576 cb (EV_A_ EV_FORK, forks [i]);
5577#endif
5578
5579#if EV_ASYNC_ENABLE
5580 if (types & EV_ASYNC)
5581 for (i = asynccnt; i--; )
5582 cb (EV_A_ EV_ASYNC, asyncs [i]);
5583#endif
5584
5585#if EV_PREPARE_ENABLE
5586 if (types & EV_PREPARE)
5587 for (i = preparecnt; i--; )
5588# if EV_EMBED_ENABLE
5589 if (ev_cb (prepares [i]) != embed_prepare_cb)
5590# endif
5591 cb (EV_A_ EV_PREPARE, prepares [i]);
5592#endif
5593
5594#if EV_CHECK_ENABLE
5595 if (types & EV_CHECK)
5596 for (i = checkcnt; i--; )
5597 cb (EV_A_ EV_CHECK, checks [i]);
5598#endif
5599
5600#if EV_SIGNAL_ENABLE
5601 if (types & EV_SIGNAL)
5602 for (i = 0; i < EV_NSIG - 1; ++i)
5603 for (wl = signals [i].head; wl; )
5604 {
5605 wn = wl->next;
5606 cb (EV_A_ EV_SIGNAL, wl);
5607 wl = wn;
5608 }
5609#endif
5610
5611#if EV_CHILD_ENABLE
5612 if (types & EV_CHILD)
5613 for (i = (EV_PID_HASHSIZE); i--; )
5614 for (wl = childs [i]; wl; )
5615 {
5616 wn = wl->next;
5617 cb (EV_A_ EV_CHILD, wl);
5618 wl = wn;
5619 }
5620#endif
5621/* EV_STAT 0x00001000 /* stat data changed */
5622/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5623}
5624#endif
5625
5626#if EV_MULTIPLICITY
5627 #include "ev_wrap.h"
5628#endif
5629

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