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Comparing libev/ev.c (file contents):
Revision 1.193 by root, Sat Dec 22 05:47:58 2007 UTC vs.
Revision 1.505 by root, Wed Jul 10 14:25:35 2019 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) 2007-2019 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 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 43# include EV_CONFIG_H
39# else 44# else
40# include "config.h" 45# include "config.h"
41# endif 46# endif
42 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
43# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
46# endif 71# endif
47# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
49# endif 74# endif
50# else 75# else
51# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
53# endif 78# endif
54# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
56# endif 81# endif
57# endif 82# endif
58 83
84# if HAVE_NANOSLEEP
59# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
60# if HAVE_NANOSLEEP
61# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
62# else 88# else
89# undef EV_USE_NANOSLEEP
63# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
64# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
65# endif 100# endif
66 101
102# if HAVE_POLL && HAVE_POLL_H
67# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
68# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
69# define EV_USE_SELECT 1
70# else
71# define EV_USE_SELECT 0
72# endif 105# endif
73# endif
74
75# ifndef EV_USE_POLL
76# if HAVE_POLL && HAVE_POLL_H
77# define EV_USE_POLL 1
78# else 106# else
107# undef EV_USE_POLL
79# define EV_USE_POLL 0 108# define EV_USE_POLL 0
80# endif
81# endif 109# endif
82 110
83# ifndef EV_USE_EPOLL
84# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
85# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
86# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
87# define EV_USE_EPOLL 0
88# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
89# endif 118# endif
90 119
91# ifndef EV_USE_KQUEUE 120# if HAVE_LINUX_AIO_ABI_H
92# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 121# ifndef EV_USE_LINUXAIO
93# define EV_USE_KQUEUE 1 122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
94# else
95# define EV_USE_KQUEUE 0
96# endif 123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
97# endif 127# endif
98 128
99# ifndef EV_USE_PORT 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# if HAVE_PORT_H && HAVE_PORT_CREATE 130# ifndef EV_USE_KQUEUE
101# define EV_USE_PORT 1 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# else
103# define EV_USE_PORT 0
104# endif 132# endif
133# else
134# undef EV_USE_KQUEUE
135# define EV_USE_KQUEUE 0
105# endif 136# endif
106 137
138# if HAVE_PORT_H && HAVE_PORT_CREATE
107# ifndef EV_USE_INOTIFY 139# ifndef EV_USE_PORT
108# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 140# define EV_USE_PORT EV_FEATURE_BACKENDS
109# define EV_USE_INOTIFY 1
110# else
111# define EV_USE_INOTIFY 0
112# endif 141# endif
142# else
143# undef EV_USE_PORT
144# define EV_USE_PORT 0
113# endif 145# endif
114 146
147# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
148# ifndef EV_USE_INOTIFY
149# define EV_USE_INOTIFY EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_INOTIFY
153# define EV_USE_INOTIFY 0
115#endif 154# endif
116 155
117#include <math.h> 156# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
157# ifndef EV_USE_SIGNALFD
158# define EV_USE_SIGNALFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_SIGNALFD
162# define EV_USE_SIGNALFD 0
163# endif
164
165# if HAVE_EVENTFD
166# ifndef EV_USE_EVENTFD
167# define EV_USE_EVENTFD EV_FEATURE_OS
168# endif
169# else
170# undef EV_USE_EVENTFD
171# define EV_USE_EVENTFD 0
172# endif
173
174#endif
175
176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
118#include <stdlib.h> 186#include <stdlib.h>
187#include <string.h>
119#include <fcntl.h> 188#include <fcntl.h>
120#include <stddef.h> 189#include <stddef.h>
121 190
122#include <stdio.h> 191#include <stdio.h>
123 192
124#include <assert.h> 193#include <assert.h>
125#include <errno.h> 194#include <errno.h>
126#include <sys/types.h> 195#include <sys/types.h>
127#include <time.h> 196#include <time.h>
197#include <limits.h>
128 198
129#include <signal.h> 199#include <signal.h>
130 200
131#ifdef EV_H 201#ifdef EV_H
132# include EV_H 202# include EV_H
133#else 203#else
134# include "ev.h" 204# include "ev.h"
205#endif
206
207#if EV_NO_THREADS
208# undef EV_NO_SMP
209# define EV_NO_SMP 1
210# undef ECB_NO_THREADS
211# define ECB_NO_THREADS 1
212#endif
213#if EV_NO_SMP
214# undef EV_NO_SMP
215# define ECB_NO_SMP 1
135#endif 216#endif
136 217
137#ifndef _WIN32 218#ifndef _WIN32
138# include <sys/time.h> 219# include <sys/time.h>
139# include <sys/wait.h> 220# include <sys/wait.h>
140# include <unistd.h> 221# include <unistd.h>
141#else 222#else
223# include <io.h>
142# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
143# include <windows.h> 226# include <windows.h>
144# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
145# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
146# endif 229# endif
230# undef EV_AVOID_STDIO
231#endif
232
233/* this block tries to deduce configuration from header-defined symbols and defaults */
234
235/* try to deduce the maximum number of signals on this platform */
236#if defined EV_NSIG
237/* use what's provided */
238#elif defined NSIG
239# define EV_NSIG (NSIG)
240#elif defined _NSIG
241# define EV_NSIG (_NSIG)
242#elif defined SIGMAX
243# define EV_NSIG (SIGMAX+1)
244#elif defined SIG_MAX
245# define EV_NSIG (SIG_MAX+1)
246#elif defined _SIG_MAX
247# define EV_NSIG (_SIG_MAX+1)
248#elif defined MAXSIG
249# define EV_NSIG (MAXSIG+1)
250#elif defined MAX_SIG
251# define EV_NSIG (MAX_SIG+1)
252#elif defined SIGARRAYSIZE
253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
254#elif defined _sys_nsig
255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
256#else
257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
258#endif
259
260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
262#endif
263
264#ifndef EV_USE_CLOCK_SYSCALL
265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
267# else
268# define EV_USE_CLOCK_SYSCALL 0
147#endif 269# endif
270#endif
148 271
149/**/ 272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
150 280
151#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
283# define EV_USE_MONOTONIC EV_FEATURE_OS
284# else
152# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
286# endif
153#endif 287#endif
154 288
155#ifndef EV_USE_REALTIME 289#ifndef EV_USE_REALTIME
156# define EV_USE_REALTIME 0 290# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
157#endif 291#endif
158 292
159#ifndef EV_USE_NANOSLEEP 293#ifndef EV_USE_NANOSLEEP
294# if _POSIX_C_SOURCE >= 199309L
295# define EV_USE_NANOSLEEP EV_FEATURE_OS
296# else
160# define EV_USE_NANOSLEEP 0 297# define EV_USE_NANOSLEEP 0
298# endif
161#endif 299#endif
162 300
163#ifndef EV_USE_SELECT 301#ifndef EV_USE_SELECT
164# define EV_USE_SELECT 1 302# define EV_USE_SELECT EV_FEATURE_BACKENDS
165#endif 303#endif
166 304
167#ifndef EV_USE_POLL 305#ifndef EV_USE_POLL
168# ifdef _WIN32 306# ifdef _WIN32
169# define EV_USE_POLL 0 307# define EV_USE_POLL 0
170# else 308# else
171# define EV_USE_POLL 1 309# define EV_USE_POLL EV_FEATURE_BACKENDS
172# endif 310# endif
173#endif 311#endif
174 312
175#ifndef EV_USE_EPOLL 313#ifndef EV_USE_EPOLL
314# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
315# define EV_USE_EPOLL EV_FEATURE_BACKENDS
316# else
176# define EV_USE_EPOLL 0 317# define EV_USE_EPOLL 0
318# endif
177#endif 319#endif
178 320
179#ifndef EV_USE_KQUEUE 321#ifndef EV_USE_KQUEUE
180# define EV_USE_KQUEUE 0 322# define EV_USE_KQUEUE 0
181#endif 323#endif
182 324
183#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
184# define EV_USE_PORT 0 326# define EV_USE_PORT 0
185#endif 327#endif
186 328
329#ifndef EV_USE_LINUXAIO
330# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331# define EV_USE_LINUXAIO 1
332# else
333# define EV_USE_LINUXAIO 0
334# endif
335#endif
336
337#ifndef EV_USE_IOURING
338# if __linux
339# define EV_USE_IOURING 0
340# else
341# define EV_USE_IOURING 0
342# endif
343#endif
344
187#ifndef EV_USE_INOTIFY 345#ifndef EV_USE_INOTIFY
346# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
347# define EV_USE_INOTIFY EV_FEATURE_OS
348# else
188# define EV_USE_INOTIFY 0 349# define EV_USE_INOTIFY 0
350# endif
189#endif 351#endif
190 352
191#ifndef EV_PID_HASHSIZE 353#ifndef EV_PID_HASHSIZE
192# if EV_MINIMAL 354# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
193# define EV_PID_HASHSIZE 1 355#endif
356
357#ifndef EV_INOTIFY_HASHSIZE
358# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
359#endif
360
361#ifndef EV_USE_EVENTFD
362# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
363# define EV_USE_EVENTFD EV_FEATURE_OS
194# else 364# else
195# define EV_PID_HASHSIZE 16 365# define EV_USE_EVENTFD 0
196# endif 366# endif
197#endif 367#endif
198 368
199#ifndef EV_INOTIFY_HASHSIZE 369#ifndef EV_USE_SIGNALFD
200# if EV_MINIMAL 370# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
201# define EV_INOTIFY_HASHSIZE 1 371# define EV_USE_SIGNALFD EV_FEATURE_OS
202# else 372# else
203# define EV_INOTIFY_HASHSIZE 16 373# define EV_USE_SIGNALFD 0
204# endif 374# endif
205#endif 375#endif
206 376
207/**/ 377#if 0 /* debugging */
378# define EV_VERIFY 3
379# define EV_USE_4HEAP 1
380# define EV_HEAP_CACHE_AT 1
381#endif
382
383#ifndef EV_VERIFY
384# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
385#endif
386
387#ifndef EV_USE_4HEAP
388# define EV_USE_4HEAP EV_FEATURE_DATA
389#endif
390
391#ifndef EV_HEAP_CACHE_AT
392# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
393#endif
394
395#ifdef __ANDROID__
396/* supposedly, android doesn't typedef fd_mask */
397# undef EV_USE_SELECT
398# define EV_USE_SELECT 0
399/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
400# undef EV_USE_CLOCK_SYSCALL
401# define EV_USE_CLOCK_SYSCALL 0
402#endif
403
404/* aix's poll.h seems to cause lots of trouble */
405#ifdef _AIX
406/* AIX has a completely broken poll.h header */
407# undef EV_USE_POLL
408# define EV_USE_POLL 0
409#endif
410
411/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
412/* which makes programs even slower. might work on other unices, too. */
413#if EV_USE_CLOCK_SYSCALL
414# include <sys/syscall.h>
415# ifdef SYS_clock_gettime
416# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
417# undef EV_USE_MONOTONIC
418# define EV_USE_MONOTONIC 1
419# define EV_NEED_SYSCALL 1
420# else
421# undef EV_USE_CLOCK_SYSCALL
422# define EV_USE_CLOCK_SYSCALL 0
423# endif
424#endif
425
426/* this block fixes any misconfiguration where we know we run into trouble otherwise */
208 427
209#ifndef CLOCK_MONOTONIC 428#ifndef CLOCK_MONOTONIC
210# undef EV_USE_MONOTONIC 429# undef EV_USE_MONOTONIC
211# define EV_USE_MONOTONIC 0 430# define EV_USE_MONOTONIC 0
212#endif 431#endif
… …
220# undef EV_USE_INOTIFY 439# undef EV_USE_INOTIFY
221# define EV_USE_INOTIFY 0 440# define EV_USE_INOTIFY 0
222#endif 441#endif
223 442
224#if !EV_USE_NANOSLEEP 443#if !EV_USE_NANOSLEEP
225# ifndef _WIN32 444/* hp-ux has it in sys/time.h, which we unconditionally include above */
445# if !defined _WIN32 && !defined __hpux
226# include <sys/select.h> 446# include <sys/select.h>
227# endif 447# endif
228#endif 448#endif
229 449
450#if EV_USE_LINUXAIO
451# include <sys/syscall.h>
452# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
453# define EV_NEED_SYSCALL 1
454# else
455# undef EV_USE_LINUXAIO
456# define EV_USE_LINUXAIO 0
457# endif
458#endif
459
460#if EV_USE_IOURING
461# include <sys/syscall.h>
462# if !SYS_io_uring_setup && __linux && !__alpha
463# define SYS_io_uring_setup 425
464# define SYS_io_uring_enter 426
465# define SYS_io_uring_wregister 427
466# endif
467# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
468# define EV_NEED_SYSCALL 1
469# else
470# undef EV_USE_IOURING
471# define EV_USE_IOURING 0
472# endif
473#endif
474
230#if EV_USE_INOTIFY 475#if EV_USE_INOTIFY
476# include <sys/statfs.h>
231# include <sys/inotify.h> 477# include <sys/inotify.h>
478/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
479# ifndef IN_DONT_FOLLOW
480# undef EV_USE_INOTIFY
481# define EV_USE_INOTIFY 0
232#endif 482# endif
483#endif
233 484
234#if EV_SELECT_IS_WINSOCKET 485#if EV_USE_EVENTFD
486/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
235# include <winsock.h> 487# include <stdint.h>
488# ifndef EFD_NONBLOCK
489# define EFD_NONBLOCK O_NONBLOCK
236#endif 490# endif
491# ifndef EFD_CLOEXEC
492# ifdef O_CLOEXEC
493# define EFD_CLOEXEC O_CLOEXEC
494# else
495# define EFD_CLOEXEC 02000000
496# endif
497# endif
498EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
499#endif
237 500
238/**/ 501#if EV_USE_SIGNALFD
502/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
503# include <stdint.h>
504# ifndef SFD_NONBLOCK
505# define SFD_NONBLOCK O_NONBLOCK
506# endif
507# ifndef SFD_CLOEXEC
508# ifdef O_CLOEXEC
509# define SFD_CLOEXEC O_CLOEXEC
510# else
511# define SFD_CLOEXEC 02000000
512# endif
513# endif
514EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
515
516struct signalfd_siginfo
517{
518 uint32_t ssi_signo;
519 char pad[128 - sizeof (uint32_t)];
520};
521#endif
522
523/*****************************************************************************/
524
525#if EV_VERIFY >= 3
526# define EV_FREQUENT_CHECK ev_verify (EV_A)
527#else
528# define EV_FREQUENT_CHECK do { } while (0)
529#endif
239 530
240/* 531/*
241 * This is used to avoid floating point rounding problems. 532 * This is used to work around floating point rounding problems.
242 * It is added to ev_rt_now when scheduling periodics
243 * to ensure progress, time-wise, even when rounding
244 * errors are against us.
245 * This value is good at least till the year 4000. 533 * This value is good at least till the year 4000.
246 * Better solutions welcome.
247 */ 534 */
248#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 535#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
536/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
249 537
250#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 538#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
251#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 539#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
252/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
253 540
541/* find a portable timestamp that is "always" in the future but fits into time_t.
542 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
543 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
544#define EV_TSTAMP_HUGE \
545 (sizeof (time_t) >= 8 ? 10000000000000. \
546 : 0 < (time_t)4294967295 ? 4294967295. \
547 : 2147483647.) \
548
549#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
550#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
551#define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e6)
552#define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e9)
553
554/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
555/* ECB.H BEGIN */
556/*
557 * libecb - http://software.schmorp.de/pkg/libecb
558 *
559 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
560 * Copyright (©) 2011 Emanuele Giaquinta
561 * All rights reserved.
562 *
563 * Redistribution and use in source and binary forms, with or without modifica-
564 * tion, are permitted provided that the following conditions are met:
565 *
566 * 1. Redistributions of source code must retain the above copyright notice,
567 * this list of conditions and the following disclaimer.
568 *
569 * 2. Redistributions in binary form must reproduce the above copyright
570 * notice, this list of conditions and the following disclaimer in the
571 * documentation and/or other materials provided with the distribution.
572 *
573 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
574 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
575 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
576 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
577 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
578 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
579 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
580 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
581 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
582 * OF THE POSSIBILITY OF SUCH DAMAGE.
583 *
584 * Alternatively, the contents of this file may be used under the terms of
585 * the GNU General Public License ("GPL") version 2 or any later version,
586 * in which case the provisions of the GPL are applicable instead of
587 * the above. If you wish to allow the use of your version of this file
588 * only under the terms of the GPL and not to allow others to use your
589 * version of this file under the BSD license, indicate your decision
590 * by deleting the provisions above and replace them with the notice
591 * and other provisions required by the GPL. If you do not delete the
592 * provisions above, a recipient may use your version of this file under
593 * either the BSD or the GPL.
594 */
595
596#ifndef ECB_H
597#define ECB_H
598
599/* 16 bits major, 16 bits minor */
600#define ECB_VERSION 0x00010006
601
602#ifdef _WIN32
603 typedef signed char int8_t;
604 typedef unsigned char uint8_t;
605 typedef signed short int16_t;
606 typedef unsigned short uint16_t;
607 typedef signed int int32_t;
608 typedef unsigned int uint32_t;
254#if __GNUC__ >= 4 609 #if __GNUC__
255# define expect(expr,value) __builtin_expect ((expr),(value)) 610 typedef signed long long int64_t;
256# define noinline __attribute__ ((noinline)) 611 typedef unsigned long long uint64_t;
612 #else /* _MSC_VER || __BORLANDC__ */
613 typedef signed __int64 int64_t;
614 typedef unsigned __int64 uint64_t;
615 #endif
616 #ifdef _WIN64
617 #define ECB_PTRSIZE 8
618 typedef uint64_t uintptr_t;
619 typedef int64_t intptr_t;
620 #else
621 #define ECB_PTRSIZE 4
622 typedef uint32_t uintptr_t;
623 typedef int32_t intptr_t;
624 #endif
257#else 625#else
258# define expect(expr,value) (expr) 626 #include <inttypes.h>
259# define noinline 627 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
260# if __STDC_VERSION__ < 199901L 628 #define ECB_PTRSIZE 8
261# define inline 629 #else
630 #define ECB_PTRSIZE 4
631 #endif
262# endif 632#endif
633
634#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
635#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
636
637/* work around x32 idiocy by defining proper macros */
638#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
639 #if _ILP32
640 #define ECB_AMD64_X32 1
641 #else
642 #define ECB_AMD64 1
263#endif 643 #endif
644#endif
264 645
265#define expect_false(expr) expect ((expr) != 0, 0) 646/* many compilers define _GNUC_ to some versions but then only implement
266#define expect_true(expr) expect ((expr) != 0, 1) 647 * what their idiot authors think are the "more important" extensions,
267#define inline_size static inline 648 * causing enormous grief in return for some better fake benchmark numbers.
268 649 * or so.
269#if EV_MINIMAL 650 * we try to detect these and simply assume they are not gcc - if they have
270# define inline_speed static noinline 651 * an issue with that they should have done it right in the first place.
652 */
653#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
654 #define ECB_GCC_VERSION(major,minor) 0
271#else 655#else
656 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
657#endif
658
659#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
660
661#if __clang__ && defined __has_builtin
662 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
663#else
664 #define ECB_CLANG_BUILTIN(x) 0
665#endif
666
667#if __clang__ && defined __has_extension
668 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
669#else
670 #define ECB_CLANG_EXTENSION(x) 0
671#endif
672
673#define ECB_CPP (__cplusplus+0)
674#define ECB_CPP11 (__cplusplus >= 201103L)
675#define ECB_CPP14 (__cplusplus >= 201402L)
676#define ECB_CPP17 (__cplusplus >= 201703L)
677
678#if ECB_CPP
679 #define ECB_C 0
680 #define ECB_STDC_VERSION 0
681#else
682 #define ECB_C 1
683 #define ECB_STDC_VERSION __STDC_VERSION__
684#endif
685
686#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
687#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
688#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
689
690#if ECB_CPP
691 #define ECB_EXTERN_C extern "C"
692 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
693 #define ECB_EXTERN_C_END }
694#else
695 #define ECB_EXTERN_C extern
696 #define ECB_EXTERN_C_BEG
697 #define ECB_EXTERN_C_END
698#endif
699
700/*****************************************************************************/
701
702/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
703/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
704
705#if ECB_NO_THREADS
706 #define ECB_NO_SMP 1
707#endif
708
709#if ECB_NO_SMP
710 #define ECB_MEMORY_FENCE do { } while (0)
711#endif
712
713/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
714#if __xlC__ && ECB_CPP
715 #include <builtins.h>
716#endif
717
718#if 1400 <= _MSC_VER
719 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
720#endif
721
722#ifndef ECB_MEMORY_FENCE
723 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
724 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
725 #if __i386 || __i386__
726 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
727 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
729 #elif ECB_GCC_AMD64
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
731 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
732 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
733 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
735 #elif defined __ARM_ARCH_2__ \
736 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
737 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
738 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
739 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
740 || defined __ARM_ARCH_5TEJ__
741 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
742 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
743 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
744 || defined __ARM_ARCH_6T2__
745 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
746 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
747 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
748 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
749 #elif __aarch64__
750 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
751 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
752 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
753 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
754 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
755 #elif defined __s390__ || defined __s390x__
756 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
757 #elif defined __mips__
758 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
759 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
760 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
761 #elif defined __alpha__
762 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
763 #elif defined __hppa__
764 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
765 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
766 #elif defined __ia64__
767 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
768 #elif defined __m68k__
769 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
770 #elif defined __m88k__
771 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
772 #elif defined __sh__
773 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
774 #endif
775 #endif
776#endif
777
778#ifndef ECB_MEMORY_FENCE
779 #if ECB_GCC_VERSION(4,7)
780 /* see comment below (stdatomic.h) about the C11 memory model. */
781 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
782 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
783 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
784 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
785
786 #elif ECB_CLANG_EXTENSION(c_atomic)
787 /* see comment below (stdatomic.h) about the C11 memory model. */
788 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
789 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
790 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
791 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
792
793 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
794 #define ECB_MEMORY_FENCE __sync_synchronize ()
795 #elif _MSC_VER >= 1500 /* VC++ 2008 */
796 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
797 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
798 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
799 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
800 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
801 #elif _MSC_VER >= 1400 /* VC++ 2005 */
802 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
803 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
804 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
805 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
806 #elif defined _WIN32
807 #include <WinNT.h>
808 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
809 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
810 #include <mbarrier.h>
811 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
812 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
813 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
814 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
815 #elif __xlC__
816 #define ECB_MEMORY_FENCE __sync ()
817 #endif
818#endif
819
820#ifndef ECB_MEMORY_FENCE
821 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
822 /* we assume that these memory fences work on all variables/all memory accesses, */
823 /* not just C11 atomics and atomic accesses */
824 #include <stdatomic.h>
825 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
826 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
827 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
828 #endif
829#endif
830
831#ifndef ECB_MEMORY_FENCE
832 #if !ECB_AVOID_PTHREADS
833 /*
834 * if you get undefined symbol references to pthread_mutex_lock,
835 * or failure to find pthread.h, then you should implement
836 * the ECB_MEMORY_FENCE operations for your cpu/compiler
837 * OR provide pthread.h and link against the posix thread library
838 * of your system.
839 */
840 #include <pthread.h>
841 #define ECB_NEEDS_PTHREADS 1
842 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
843
844 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
845 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
846 #endif
847#endif
848
849#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
850 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
851#endif
852
853#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
854 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
855#endif
856
857#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
858 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
859#endif
860
861/*****************************************************************************/
862
863#if ECB_CPP
864 #define ecb_inline static inline
865#elif ECB_GCC_VERSION(2,5)
866 #define ecb_inline static __inline__
867#elif ECB_C99
868 #define ecb_inline static inline
869#else
870 #define ecb_inline static
871#endif
872
873#if ECB_GCC_VERSION(3,3)
874 #define ecb_restrict __restrict__
875#elif ECB_C99
876 #define ecb_restrict restrict
877#else
878 #define ecb_restrict
879#endif
880
881typedef int ecb_bool;
882
883#define ECB_CONCAT_(a, b) a ## b
884#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
885#define ECB_STRINGIFY_(a) # a
886#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
887#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
888
889#define ecb_function_ ecb_inline
890
891#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
892 #define ecb_attribute(attrlist) __attribute__ (attrlist)
893#else
894 #define ecb_attribute(attrlist)
895#endif
896
897#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
898 #define ecb_is_constant(expr) __builtin_constant_p (expr)
899#else
900 /* possible C11 impl for integral types
901 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
902 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
903
904 #define ecb_is_constant(expr) 0
905#endif
906
907#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
908 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
909#else
910 #define ecb_expect(expr,value) (expr)
911#endif
912
913#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
914 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
915#else
916 #define ecb_prefetch(addr,rw,locality)
917#endif
918
919/* no emulation for ecb_decltype */
920#if ECB_CPP11
921 // older implementations might have problems with decltype(x)::type, work around it
922 template<class T> struct ecb_decltype_t { typedef T type; };
923 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
924#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
925 #define ecb_decltype(x) __typeof__ (x)
926#endif
927
928#if _MSC_VER >= 1300
929 #define ecb_deprecated __declspec (deprecated)
930#else
931 #define ecb_deprecated ecb_attribute ((__deprecated__))
932#endif
933
934#if _MSC_VER >= 1500
935 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
936#elif ECB_GCC_VERSION(4,5)
937 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
938#else
939 #define ecb_deprecated_message(msg) ecb_deprecated
940#endif
941
942#if _MSC_VER >= 1400
943 #define ecb_noinline __declspec (noinline)
944#else
945 #define ecb_noinline ecb_attribute ((__noinline__))
946#endif
947
948#define ecb_unused ecb_attribute ((__unused__))
949#define ecb_const ecb_attribute ((__const__))
950#define ecb_pure ecb_attribute ((__pure__))
951
952#if ECB_C11 || __IBMC_NORETURN
953 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
954 #define ecb_noreturn _Noreturn
955#elif ECB_CPP11
956 #define ecb_noreturn [[noreturn]]
957#elif _MSC_VER >= 1200
958 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
959 #define ecb_noreturn __declspec (noreturn)
960#else
961 #define ecb_noreturn ecb_attribute ((__noreturn__))
962#endif
963
964#if ECB_GCC_VERSION(4,3)
965 #define ecb_artificial ecb_attribute ((__artificial__))
966 #define ecb_hot ecb_attribute ((__hot__))
967 #define ecb_cold ecb_attribute ((__cold__))
968#else
969 #define ecb_artificial
970 #define ecb_hot
971 #define ecb_cold
972#endif
973
974/* put around conditional expressions if you are very sure that the */
975/* expression is mostly true or mostly false. note that these return */
976/* booleans, not the expression. */
977#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
978#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
979/* for compatibility to the rest of the world */
980#define ecb_likely(expr) ecb_expect_true (expr)
981#define ecb_unlikely(expr) ecb_expect_false (expr)
982
983/* count trailing zero bits and count # of one bits */
984#if ECB_GCC_VERSION(3,4) \
985 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
986 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
987 && ECB_CLANG_BUILTIN(__builtin_popcount))
988 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
989 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
990 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
991 #define ecb_ctz32(x) __builtin_ctz (x)
992 #define ecb_ctz64(x) __builtin_ctzll (x)
993 #define ecb_popcount32(x) __builtin_popcount (x)
994 /* no popcountll */
995#else
996 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
997 ecb_function_ ecb_const int
998 ecb_ctz32 (uint32_t x)
999 {
1000#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1001 unsigned long r;
1002 _BitScanForward (&r, x);
1003 return (int)r;
1004#else
1005 int r = 0;
1006
1007 x &= ~x + 1; /* this isolates the lowest bit */
1008
1009#if ECB_branchless_on_i386
1010 r += !!(x & 0xaaaaaaaa) << 0;
1011 r += !!(x & 0xcccccccc) << 1;
1012 r += !!(x & 0xf0f0f0f0) << 2;
1013 r += !!(x & 0xff00ff00) << 3;
1014 r += !!(x & 0xffff0000) << 4;
1015#else
1016 if (x & 0xaaaaaaaa) r += 1;
1017 if (x & 0xcccccccc) r += 2;
1018 if (x & 0xf0f0f0f0) r += 4;
1019 if (x & 0xff00ff00) r += 8;
1020 if (x & 0xffff0000) r += 16;
1021#endif
1022
1023 return r;
1024#endif
1025 }
1026
1027 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1028 ecb_function_ ecb_const int
1029 ecb_ctz64 (uint64_t x)
1030 {
1031#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1032 unsigned long r;
1033 _BitScanForward64 (&r, x);
1034 return (int)r;
1035#else
1036 int shift = x & 0xffffffff ? 0 : 32;
1037 return ecb_ctz32 (x >> shift) + shift;
1038#endif
1039 }
1040
1041 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1042 ecb_function_ ecb_const int
1043 ecb_popcount32 (uint32_t x)
1044 {
1045 x -= (x >> 1) & 0x55555555;
1046 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1047 x = ((x >> 4) + x) & 0x0f0f0f0f;
1048 x *= 0x01010101;
1049
1050 return x >> 24;
1051 }
1052
1053 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1054 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1055 {
1056#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1057 unsigned long r;
1058 _BitScanReverse (&r, x);
1059 return (int)r;
1060#else
1061 int r = 0;
1062
1063 if (x >> 16) { x >>= 16; r += 16; }
1064 if (x >> 8) { x >>= 8; r += 8; }
1065 if (x >> 4) { x >>= 4; r += 4; }
1066 if (x >> 2) { x >>= 2; r += 2; }
1067 if (x >> 1) { r += 1; }
1068
1069 return r;
1070#endif
1071 }
1072
1073 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1074 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1075 {
1076#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1077 unsigned long r;
1078 _BitScanReverse64 (&r, x);
1079 return (int)r;
1080#else
1081 int r = 0;
1082
1083 if (x >> 32) { x >>= 32; r += 32; }
1084
1085 return r + ecb_ld32 (x);
1086#endif
1087 }
1088#endif
1089
1090ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1091ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1092ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1093ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1094
1095ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1096ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1097{
1098 return ( (x * 0x0802U & 0x22110U)
1099 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1100}
1101
1102ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1103ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1104{
1105 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1106 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1107 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1108 x = ( x >> 8 ) | ( x << 8);
1109
1110 return x;
1111}
1112
1113ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1114ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1115{
1116 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1117 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1118 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1119 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1120 x = ( x >> 16 ) | ( x << 16);
1121
1122 return x;
1123}
1124
1125/* popcount64 is only available on 64 bit cpus as gcc builtin */
1126/* so for this version we are lazy */
1127ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1128ecb_function_ ecb_const int
1129ecb_popcount64 (uint64_t x)
1130{
1131 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1132}
1133
1134ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1135ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1136ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1137ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1138ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1139ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1140ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1141ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1142
1143ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1144ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1145ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1146ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1147ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1148ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1149ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1150ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1151
1152#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1153 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1154 #define ecb_bswap16(x) __builtin_bswap16 (x)
1155 #else
1156 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1157 #endif
1158 #define ecb_bswap32(x) __builtin_bswap32 (x)
1159 #define ecb_bswap64(x) __builtin_bswap64 (x)
1160#elif _MSC_VER
1161 #include <stdlib.h>
1162 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1163 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1164 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1165#else
1166 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1167 ecb_function_ ecb_const uint16_t
1168 ecb_bswap16 (uint16_t x)
1169 {
1170 return ecb_rotl16 (x, 8);
1171 }
1172
1173 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1174 ecb_function_ ecb_const uint32_t
1175 ecb_bswap32 (uint32_t x)
1176 {
1177 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1178 }
1179
1180 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1181 ecb_function_ ecb_const uint64_t
1182 ecb_bswap64 (uint64_t x)
1183 {
1184 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1185 }
1186#endif
1187
1188#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1189 #define ecb_unreachable() __builtin_unreachable ()
1190#else
1191 /* this seems to work fine, but gcc always emits a warning for it :/ */
1192 ecb_inline ecb_noreturn void ecb_unreachable (void);
1193 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1194#endif
1195
1196/* try to tell the compiler that some condition is definitely true */
1197#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1198
1199ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1200ecb_inline ecb_const uint32_t
1201ecb_byteorder_helper (void)
1202{
1203 /* the union code still generates code under pressure in gcc, */
1204 /* but less than using pointers, and always seems to */
1205 /* successfully return a constant. */
1206 /* the reason why we have this horrible preprocessor mess */
1207 /* is to avoid it in all cases, at least on common architectures */
1208 /* or when using a recent enough gcc version (>= 4.6) */
1209#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1210 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1211 #define ECB_LITTLE_ENDIAN 1
1212 return 0x44332211;
1213#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1214 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1215 #define ECB_BIG_ENDIAN 1
1216 return 0x11223344;
1217#else
1218 union
1219 {
1220 uint8_t c[4];
1221 uint32_t u;
1222 } u = { 0x11, 0x22, 0x33, 0x44 };
1223 return u.u;
1224#endif
1225}
1226
1227ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1228ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1229ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1230ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1231
1232#if ECB_GCC_VERSION(3,0) || ECB_C99
1233 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1234#else
1235 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1236#endif
1237
1238#if ECB_CPP
1239 template<typename T>
1240 static inline T ecb_div_rd (T val, T div)
1241 {
1242 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1243 }
1244 template<typename T>
1245 static inline T ecb_div_ru (T val, T div)
1246 {
1247 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1248 }
1249#else
1250 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1251 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1252#endif
1253
1254#if ecb_cplusplus_does_not_suck
1255 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1256 template<typename T, int N>
1257 static inline int ecb_array_length (const T (&arr)[N])
1258 {
1259 return N;
1260 }
1261#else
1262 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1263#endif
1264
1265ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1266ecb_function_ ecb_const uint32_t
1267ecb_binary16_to_binary32 (uint32_t x)
1268{
1269 unsigned int s = (x & 0x8000) << (31 - 15);
1270 int e = (x >> 10) & 0x001f;
1271 unsigned int m = x & 0x03ff;
1272
1273 if (ecb_expect_false (e == 31))
1274 /* infinity or NaN */
1275 e = 255 - (127 - 15);
1276 else if (ecb_expect_false (!e))
1277 {
1278 if (ecb_expect_true (!m))
1279 /* zero, handled by code below by forcing e to 0 */
1280 e = 0 - (127 - 15);
1281 else
1282 {
1283 /* subnormal, renormalise */
1284 unsigned int s = 10 - ecb_ld32 (m);
1285
1286 m = (m << s) & 0x3ff; /* mask implicit bit */
1287 e -= s - 1;
1288 }
1289 }
1290
1291 /* e and m now are normalised, or zero, (or inf or nan) */
1292 e += 127 - 15;
1293
1294 return s | (e << 23) | (m << (23 - 10));
1295}
1296
1297ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1298ecb_function_ ecb_const uint16_t
1299ecb_binary32_to_binary16 (uint32_t x)
1300{
1301 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1302 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1303 unsigned int m = x & 0x007fffff;
1304
1305 x &= 0x7fffffff;
1306
1307 /* if it's within range of binary16 normals, use fast path */
1308 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1309 {
1310 /* mantissa round-to-even */
1311 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1312
1313 /* handle overflow */
1314 if (ecb_expect_false (m >= 0x00800000))
1315 {
1316 m >>= 1;
1317 e += 1;
1318 }
1319
1320 return s | (e << 10) | (m >> (23 - 10));
1321 }
1322
1323 /* handle large numbers and infinity */
1324 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1325 return s | 0x7c00;
1326
1327 /* handle zero, subnormals and small numbers */
1328 if (ecb_expect_true (x < 0x38800000))
1329 {
1330 /* zero */
1331 if (ecb_expect_true (!x))
1332 return s;
1333
1334 /* handle subnormals */
1335
1336 /* too small, will be zero */
1337 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1338 return s;
1339
1340 m |= 0x00800000; /* make implicit bit explicit */
1341
1342 /* very tricky - we need to round to the nearest e (+10) bit value */
1343 {
1344 unsigned int bits = 14 - e;
1345 unsigned int half = (1 << (bits - 1)) - 1;
1346 unsigned int even = (m >> bits) & 1;
1347
1348 /* if this overflows, we will end up with a normalised number */
1349 m = (m + half + even) >> bits;
1350 }
1351
1352 return s | m;
1353 }
1354
1355 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1356 m >>= 13;
1357
1358 return s | 0x7c00 | m | !m;
1359}
1360
1361/*******************************************************************************/
1362/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1363
1364/* basically, everything uses "ieee pure-endian" floating point numbers */
1365/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1366#if 0 \
1367 || __i386 || __i386__ \
1368 || ECB_GCC_AMD64 \
1369 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1370 || defined __s390__ || defined __s390x__ \
1371 || defined __mips__ \
1372 || defined __alpha__ \
1373 || defined __hppa__ \
1374 || defined __ia64__ \
1375 || defined __m68k__ \
1376 || defined __m88k__ \
1377 || defined __sh__ \
1378 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1379 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1380 || defined __aarch64__
1381 #define ECB_STDFP 1
1382 #include <string.h> /* for memcpy */
1383#else
1384 #define ECB_STDFP 0
1385#endif
1386
1387#ifndef ECB_NO_LIBM
1388
1389 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1390
1391 /* only the oldest of old doesn't have this one. solaris. */
1392 #ifdef INFINITY
1393 #define ECB_INFINITY INFINITY
1394 #else
1395 #define ECB_INFINITY HUGE_VAL
1396 #endif
1397
1398 #ifdef NAN
1399 #define ECB_NAN NAN
1400 #else
1401 #define ECB_NAN ECB_INFINITY
1402 #endif
1403
1404 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1405 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1406 #define ecb_frexpf(x,e) frexpf ((x), (e))
1407 #else
1408 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1409 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1410 #endif
1411
1412 /* convert a float to ieee single/binary32 */
1413 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1414 ecb_function_ ecb_const uint32_t
1415 ecb_float_to_binary32 (float x)
1416 {
1417 uint32_t r;
1418
1419 #if ECB_STDFP
1420 memcpy (&r, &x, 4);
1421 #else
1422 /* slow emulation, works for anything but -0 */
1423 uint32_t m;
1424 int e;
1425
1426 if (x == 0e0f ) return 0x00000000U;
1427 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1428 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1429 if (x != x ) return 0x7fbfffffU;
1430
1431 m = ecb_frexpf (x, &e) * 0x1000000U;
1432
1433 r = m & 0x80000000U;
1434
1435 if (r)
1436 m = -m;
1437
1438 if (e <= -126)
1439 {
1440 m &= 0xffffffU;
1441 m >>= (-125 - e);
1442 e = -126;
1443 }
1444
1445 r |= (e + 126) << 23;
1446 r |= m & 0x7fffffU;
1447 #endif
1448
1449 return r;
1450 }
1451
1452 /* converts an ieee single/binary32 to a float */
1453 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1454 ecb_function_ ecb_const float
1455 ecb_binary32_to_float (uint32_t x)
1456 {
1457 float r;
1458
1459 #if ECB_STDFP
1460 memcpy (&r, &x, 4);
1461 #else
1462 /* emulation, only works for normals and subnormals and +0 */
1463 int neg = x >> 31;
1464 int e = (x >> 23) & 0xffU;
1465
1466 x &= 0x7fffffU;
1467
1468 if (e)
1469 x |= 0x800000U;
1470 else
1471 e = 1;
1472
1473 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1474 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1475
1476 r = neg ? -r : r;
1477 #endif
1478
1479 return r;
1480 }
1481
1482 /* convert a double to ieee double/binary64 */
1483 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1484 ecb_function_ ecb_const uint64_t
1485 ecb_double_to_binary64 (double x)
1486 {
1487 uint64_t r;
1488
1489 #if ECB_STDFP
1490 memcpy (&r, &x, 8);
1491 #else
1492 /* slow emulation, works for anything but -0 */
1493 uint64_t m;
1494 int e;
1495
1496 if (x == 0e0 ) return 0x0000000000000000U;
1497 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1498 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1499 if (x != x ) return 0X7ff7ffffffffffffU;
1500
1501 m = frexp (x, &e) * 0x20000000000000U;
1502
1503 r = m & 0x8000000000000000;;
1504
1505 if (r)
1506 m = -m;
1507
1508 if (e <= -1022)
1509 {
1510 m &= 0x1fffffffffffffU;
1511 m >>= (-1021 - e);
1512 e = -1022;
1513 }
1514
1515 r |= ((uint64_t)(e + 1022)) << 52;
1516 r |= m & 0xfffffffffffffU;
1517 #endif
1518
1519 return r;
1520 }
1521
1522 /* converts an ieee double/binary64 to a double */
1523 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1524 ecb_function_ ecb_const double
1525 ecb_binary64_to_double (uint64_t x)
1526 {
1527 double r;
1528
1529 #if ECB_STDFP
1530 memcpy (&r, &x, 8);
1531 #else
1532 /* emulation, only works for normals and subnormals and +0 */
1533 int neg = x >> 63;
1534 int e = (x >> 52) & 0x7ffU;
1535
1536 x &= 0xfffffffffffffU;
1537
1538 if (e)
1539 x |= 0x10000000000000U;
1540 else
1541 e = 1;
1542
1543 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1544 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1545
1546 r = neg ? -r : r;
1547 #endif
1548
1549 return r;
1550 }
1551
1552 /* convert a float to ieee half/binary16 */
1553 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1554 ecb_function_ ecb_const uint16_t
1555 ecb_float_to_binary16 (float x)
1556 {
1557 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1558 }
1559
1560 /* convert an ieee half/binary16 to float */
1561 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1562 ecb_function_ ecb_const float
1563 ecb_binary16_to_float (uint16_t x)
1564 {
1565 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1566 }
1567
1568#endif
1569
1570#endif
1571
1572/* ECB.H END */
1573
1574#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1575/* if your architecture doesn't need memory fences, e.g. because it is
1576 * single-cpu/core, or if you use libev in a project that doesn't use libev
1577 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1578 * libev, in which cases the memory fences become nops.
1579 * alternatively, you can remove this #error and link against libpthread,
1580 * which will then provide the memory fences.
1581 */
1582# error "memory fences not defined for your architecture, please report"
1583#endif
1584
1585#ifndef ECB_MEMORY_FENCE
1586# define ECB_MEMORY_FENCE do { } while (0)
1587# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1588# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1589#endif
1590
1591#define inline_size ecb_inline
1592
1593#if EV_FEATURE_CODE
272# define inline_speed static inline 1594# define inline_speed ecb_inline
1595#else
1596# define inline_speed ecb_noinline static
273#endif 1597#endif
274 1598
1599/*****************************************************************************/
1600/* raw syscall wrappers */
1601
1602#if EV_NEED_SYSCALL
1603
1604#include <sys/syscall.h>
1605
1606/*
1607 * define some syscall wrappers for common architectures
1608 * this is mostly for nice looks during debugging, not performance.
1609 * our syscalls return < 0, not == -1, on error. which is good
1610 * enough for linux aio.
1611 * TODO: arm is also common nowadays, maybe even mips and x86
1612 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1613 */
1614#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
1615 /* the costly errno access probably kills this for size optimisation */
1616
1617 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1618 ({ \
1619 long res; \
1620 register unsigned long r6 __asm__ ("r9" ); \
1621 register unsigned long r5 __asm__ ("r8" ); \
1622 register unsigned long r4 __asm__ ("r10"); \
1623 register unsigned long r3 __asm__ ("rdx"); \
1624 register unsigned long r2 __asm__ ("rsi"); \
1625 register unsigned long r1 __asm__ ("rdi"); \
1626 if (narg >= 6) r6 = (unsigned long)(arg6); \
1627 if (narg >= 5) r5 = (unsigned long)(arg5); \
1628 if (narg >= 4) r4 = (unsigned long)(arg4); \
1629 if (narg >= 3) r3 = (unsigned long)(arg3); \
1630 if (narg >= 2) r2 = (unsigned long)(arg2); \
1631 if (narg >= 1) r1 = (unsigned long)(arg1); \
1632 __asm__ __volatile__ ( \
1633 "syscall\n\t" \
1634 : "=a" (res) \
1635 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1636 : "cc", "r11", "cx", "memory"); \
1637 errno = -res; \
1638 res; \
1639 })
1640
1641#endif
1642
1643#ifdef ev_syscall
1644 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1645 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1646 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1647 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1648 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1649 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1650 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1651#else
1652 #define ev_syscall0(nr) syscall (nr)
1653 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1654 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1655 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1656 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1657 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1658 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1659#endif
1660
1661#endif
1662
1663/*****************************************************************************/
1664
275#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1665#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1666
1667#if EV_MINPRI == EV_MAXPRI
1668# define ABSPRI(w) (((W)w), 0)
1669#else
276#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1670# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1671#endif
277 1672
278#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1673#define EMPTY /* required for microsofts broken pseudo-c compiler */
279#define EMPTY2(a,b) /* used to suppress some warnings */
280 1674
281typedef ev_watcher *W; 1675typedef ev_watcher *W;
282typedef ev_watcher_list *WL; 1676typedef ev_watcher_list *WL;
283typedef ev_watcher_time *WT; 1677typedef ev_watcher_time *WT;
284 1678
1679#define ev_active(w) ((W)(w))->active
1680#define ev_at(w) ((WT)(w))->at
1681
1682#if EV_USE_REALTIME
1683/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1684/* giving it a reasonably high chance of working on typical architectures */
1685static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1686#endif
1687
1688#if EV_USE_MONOTONIC
285static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1689static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1690#endif
1691
1692#ifndef EV_FD_TO_WIN32_HANDLE
1693# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1694#endif
1695#ifndef EV_WIN32_HANDLE_TO_FD
1696# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1697#endif
1698#ifndef EV_WIN32_CLOSE_FD
1699# define EV_WIN32_CLOSE_FD(fd) close (fd)
1700#endif
286 1701
287#ifdef _WIN32 1702#ifdef _WIN32
288# include "ev_win32.c" 1703# include "ev_win32.c"
289#endif 1704#endif
290 1705
291/*****************************************************************************/ 1706/*****************************************************************************/
292 1707
1708#if EV_USE_LINUXAIO
1709# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1710#endif
1711
1712/* define a suitable floor function (only used by periodics atm) */
1713
1714#if EV_USE_FLOOR
1715# include <math.h>
1716# define ev_floor(v) floor (v)
1717#else
1718
1719#include <float.h>
1720
1721/* a floor() replacement function, should be independent of ev_tstamp type */
1722ecb_noinline
1723static ev_tstamp
1724ev_floor (ev_tstamp v)
1725{
1726 /* the choice of shift factor is not terribly important */
1727#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1728 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1729#else
1730 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1731#endif
1732
1733 /* special treatment for negative arguments */
1734 if (ecb_expect_false (v < 0.))
1735 {
1736 ev_tstamp f = -ev_floor (-v);
1737
1738 return f - (f == v ? 0 : 1);
1739 }
1740
1741 /* argument too large for an unsigned long? then reduce it */
1742 if (ecb_expect_false (v >= shift))
1743 {
1744 ev_tstamp f;
1745
1746 if (v == v - 1.)
1747 return v; /* very large numbers are assumed to be integer */
1748
1749 f = shift * ev_floor (v * (1. / shift));
1750 return f + ev_floor (v - f);
1751 }
1752
1753 /* fits into an unsigned long */
1754 return (unsigned long)v;
1755}
1756
1757#endif
1758
1759/*****************************************************************************/
1760
1761#ifdef __linux
1762# include <sys/utsname.h>
1763#endif
1764
1765ecb_noinline ecb_cold
1766static unsigned int
1767ev_linux_version (void)
1768{
1769#ifdef __linux
1770 unsigned int v = 0;
1771 struct utsname buf;
1772 int i;
1773 char *p = buf.release;
1774
1775 if (uname (&buf))
1776 return 0;
1777
1778 for (i = 3+1; --i; )
1779 {
1780 unsigned int c = 0;
1781
1782 for (;;)
1783 {
1784 if (*p >= '0' && *p <= '9')
1785 c = c * 10 + *p++ - '0';
1786 else
1787 {
1788 p += *p == '.';
1789 break;
1790 }
1791 }
1792
1793 v = (v << 8) | c;
1794 }
1795
1796 return v;
1797#else
1798 return 0;
1799#endif
1800}
1801
1802/*****************************************************************************/
1803
1804#if EV_AVOID_STDIO
1805ecb_noinline ecb_cold
1806static void
1807ev_printerr (const char *msg)
1808{
1809 write (STDERR_FILENO, msg, strlen (msg));
1810}
1811#endif
1812
293static void (*syserr_cb)(const char *msg); 1813static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
294 1814
1815ecb_cold
295void 1816void
296ev_set_syserr_cb (void (*cb)(const char *msg)) 1817ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
297{ 1818{
298 syserr_cb = cb; 1819 syserr_cb = cb;
299} 1820}
300 1821
301static void noinline 1822ecb_noinline ecb_cold
1823static void
302syserr (const char *msg) 1824ev_syserr (const char *msg)
303{ 1825{
304 if (!msg) 1826 if (!msg)
305 msg = "(libev) system error"; 1827 msg = "(libev) system error";
306 1828
307 if (syserr_cb) 1829 if (syserr_cb)
308 syserr_cb (msg); 1830 syserr_cb (msg);
309 else 1831 else
310 { 1832 {
1833#if EV_AVOID_STDIO
1834 ev_printerr (msg);
1835 ev_printerr (": ");
1836 ev_printerr (strerror (errno));
1837 ev_printerr ("\n");
1838#else
311 perror (msg); 1839 perror (msg);
1840#endif
312 abort (); 1841 abort ();
313 } 1842 }
314} 1843}
315 1844
316static void *(*alloc)(void *ptr, long size); 1845static void *
1846ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
1847{
1848 /* some systems, notably openbsd and darwin, fail to properly
1849 * implement realloc (x, 0) (as required by both ansi c-89 and
1850 * the single unix specification, so work around them here.
1851 * recently, also (at least) fedora and debian started breaking it,
1852 * despite documenting it otherwise.
1853 */
317 1854
1855 if (size)
1856 return realloc (ptr, size);
1857
1858 free (ptr);
1859 return 0;
1860}
1861
1862static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
1863
1864ecb_cold
318void 1865void
319ev_set_allocator (void *(*cb)(void *ptr, long size)) 1866ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
320{ 1867{
321 alloc = cb; 1868 alloc = cb;
322} 1869}
323 1870
324inline_speed void * 1871inline_speed void *
325ev_realloc (void *ptr, long size) 1872ev_realloc (void *ptr, long size)
326{ 1873{
327 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1874 ptr = alloc (ptr, size);
328 1875
329 if (!ptr && size) 1876 if (!ptr && size)
330 { 1877 {
1878#if EV_AVOID_STDIO
1879 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1880#else
331 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1881 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1882#endif
332 abort (); 1883 abort ();
333 } 1884 }
334 1885
335 return ptr; 1886 return ptr;
336} 1887}
… …
338#define ev_malloc(size) ev_realloc (0, (size)) 1889#define ev_malloc(size) ev_realloc (0, (size))
339#define ev_free(ptr) ev_realloc ((ptr), 0) 1890#define ev_free(ptr) ev_realloc ((ptr), 0)
340 1891
341/*****************************************************************************/ 1892/*****************************************************************************/
342 1893
1894/* set in reify when reification needed */
1895#define EV_ANFD_REIFY 1
1896
1897/* file descriptor info structure */
343typedef struct 1898typedef struct
344{ 1899{
345 WL head; 1900 WL head;
346 unsigned char events; 1901 unsigned char events; /* the events watched for */
347 unsigned char reify; 1902 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1903 unsigned char emask; /* some backends store the actual kernel mask in here */
1904 unsigned char eflags; /* flags field for use by backends */
1905#if EV_USE_EPOLL
1906 unsigned int egen; /* generation counter to counter epoll bugs */
1907#endif
348#if EV_SELECT_IS_WINSOCKET 1908#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
349 SOCKET handle; 1909 SOCKET handle;
350#endif 1910#endif
1911#if EV_USE_IOCP
1912 OVERLAPPED or, ow;
1913#endif
351} ANFD; 1914} ANFD;
352 1915
1916/* stores the pending event set for a given watcher */
353typedef struct 1917typedef struct
354{ 1918{
355 W w; 1919 W w;
356 int events; 1920 int events; /* the pending event set for the given watcher */
357} ANPENDING; 1921} ANPENDING;
358 1922
359#if EV_USE_INOTIFY 1923#if EV_USE_INOTIFY
1924/* hash table entry per inotify-id */
360typedef struct 1925typedef struct
361{ 1926{
362 WL head; 1927 WL head;
363} ANFS; 1928} ANFS;
1929#endif
1930
1931/* Heap Entry */
1932#if EV_HEAP_CACHE_AT
1933 /* a heap element */
1934 typedef struct {
1935 ev_tstamp at;
1936 WT w;
1937 } ANHE;
1938
1939 #define ANHE_w(he) (he).w /* access watcher, read-write */
1940 #define ANHE_at(he) (he).at /* access cached at, read-only */
1941 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1942#else
1943 /* a heap element */
1944 typedef WT ANHE;
1945
1946 #define ANHE_w(he) (he)
1947 #define ANHE_at(he) (he)->at
1948 #define ANHE_at_cache(he)
364#endif 1949#endif
365 1950
366#if EV_MULTIPLICITY 1951#if EV_MULTIPLICITY
367 1952
368 struct ev_loop 1953 struct ev_loop
… …
374 #undef VAR 1959 #undef VAR
375 }; 1960 };
376 #include "ev_wrap.h" 1961 #include "ev_wrap.h"
377 1962
378 static struct ev_loop default_loop_struct; 1963 static struct ev_loop default_loop_struct;
379 struct ev_loop *ev_default_loop_ptr; 1964 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
380 1965
381#else 1966#else
382 1967
383 ev_tstamp ev_rt_now; 1968 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
384 #define VAR(name,decl) static decl; 1969 #define VAR(name,decl) static decl;
385 #include "ev_vars.h" 1970 #include "ev_vars.h"
386 #undef VAR 1971 #undef VAR
387 1972
388 static int ev_default_loop_ptr; 1973 static int ev_default_loop_ptr;
389 1974
390#endif 1975#endif
391 1976
1977#if EV_FEATURE_API
1978# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
1979# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
1980# define EV_INVOKE_PENDING invoke_cb (EV_A)
1981#else
1982# define EV_RELEASE_CB (void)0
1983# define EV_ACQUIRE_CB (void)0
1984# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1985#endif
1986
1987#define EVBREAK_RECURSE 0x80
1988
392/*****************************************************************************/ 1989/*****************************************************************************/
393 1990
1991#ifndef EV_HAVE_EV_TIME
394ev_tstamp 1992ev_tstamp
395ev_time (void) 1993ev_time (void) EV_NOEXCEPT
396{ 1994{
397#if EV_USE_REALTIME 1995#if EV_USE_REALTIME
1996 if (ecb_expect_true (have_realtime))
1997 {
398 struct timespec ts; 1998 struct timespec ts;
399 clock_gettime (CLOCK_REALTIME, &ts); 1999 clock_gettime (CLOCK_REALTIME, &ts);
400 return ts.tv_sec + ts.tv_nsec * 1e-9; 2000 return EV_TS_GET (ts);
401#else 2001 }
2002#endif
2003
402 struct timeval tv; 2004 struct timeval tv;
403 gettimeofday (&tv, 0); 2005 gettimeofday (&tv, 0);
404 return tv.tv_sec + tv.tv_usec * 1e-6; 2006 return EV_TV_GET (tv);
405#endif
406} 2007}
2008#endif
407 2009
408ev_tstamp inline_size 2010inline_size ev_tstamp
409get_clock (void) 2011get_clock (void)
410{ 2012{
411#if EV_USE_MONOTONIC 2013#if EV_USE_MONOTONIC
412 if (expect_true (have_monotonic)) 2014 if (ecb_expect_true (have_monotonic))
413 { 2015 {
414 struct timespec ts; 2016 struct timespec ts;
415 clock_gettime (CLOCK_MONOTONIC, &ts); 2017 clock_gettime (CLOCK_MONOTONIC, &ts);
416 return ts.tv_sec + ts.tv_nsec * 1e-9; 2018 return EV_TS_GET (ts);
417 } 2019 }
418#endif 2020#endif
419 2021
420 return ev_time (); 2022 return ev_time ();
421} 2023}
422 2024
423#if EV_MULTIPLICITY 2025#if EV_MULTIPLICITY
424ev_tstamp 2026ev_tstamp
425ev_now (EV_P) 2027ev_now (EV_P) EV_NOEXCEPT
426{ 2028{
427 return ev_rt_now; 2029 return ev_rt_now;
428} 2030}
429#endif 2031#endif
430 2032
431void 2033void
432ev_sleep (ev_tstamp delay) 2034ev_sleep (ev_tstamp delay) EV_NOEXCEPT
433{ 2035{
434 if (delay > 0.) 2036 if (delay > 0.)
435 { 2037 {
436#if EV_USE_NANOSLEEP 2038#if EV_USE_NANOSLEEP
437 struct timespec ts; 2039 struct timespec ts;
438 2040
439 ts.tv_sec = (time_t)delay; 2041 EV_TS_SET (ts, delay);
440 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
441
442 nanosleep (&ts, 0); 2042 nanosleep (&ts, 0);
443#elif defined(_WIN32) 2043#elif defined _WIN32
2044 /* maybe this should round up, as ms is very low resolution */
2045 /* compared to select (µs) or nanosleep (ns) */
444 Sleep (delay * 1e3); 2046 Sleep ((unsigned long)(delay * 1e3));
445#else 2047#else
446 struct timeval tv; 2048 struct timeval tv;
447 2049
448 tv.tv_sec = (time_t)delay; 2050 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
449 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 2051 /* something not guaranteed by newer posix versions, but guaranteed */
450 2052 /* by older ones */
2053 EV_TV_SET (tv, delay);
451 select (0, 0, 0, 0, &tv); 2054 select (0, 0, 0, 0, &tv);
452#endif 2055#endif
453 } 2056 }
454} 2057}
455 2058
456/*****************************************************************************/ 2059/*****************************************************************************/
457 2060
458int inline_size 2061#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
2062
2063/* find a suitable new size for the given array, */
2064/* hopefully by rounding to a nice-to-malloc size */
2065inline_size int
459array_nextsize (int elem, int cur, int cnt) 2066array_nextsize (int elem, int cur, int cnt)
460{ 2067{
461 int ncur = cur + 1; 2068 int ncur = cur + 1;
462 2069
463 do 2070 do
464 ncur <<= 1; 2071 ncur <<= 1;
465 while (cnt > ncur); 2072 while (cnt > ncur);
466 2073
467 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 2074 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
468 if (elem * ncur > 4096) 2075 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
469 { 2076 {
470 ncur *= elem; 2077 ncur *= elem;
471 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 2078 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
472 ncur = ncur - sizeof (void *) * 4; 2079 ncur = ncur - sizeof (void *) * 4;
473 ncur /= elem; 2080 ncur /= elem;
474 } 2081 }
475 2082
476 return ncur; 2083 return ncur;
477} 2084}
478 2085
479static noinline void * 2086ecb_noinline ecb_cold
2087static void *
480array_realloc (int elem, void *base, int *cur, int cnt) 2088array_realloc (int elem, void *base, int *cur, int cnt)
481{ 2089{
482 *cur = array_nextsize (elem, *cur, cnt); 2090 *cur = array_nextsize (elem, *cur, cnt);
483 return ev_realloc (base, elem * *cur); 2091 return ev_realloc (base, elem * *cur);
484} 2092}
485 2093
2094#define array_needsize_noinit(base,offset,count)
2095
2096#define array_needsize_zerofill(base,offset,count) \
2097 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
2098
486#define array_needsize(type,base,cur,cnt,init) \ 2099#define array_needsize(type,base,cur,cnt,init) \
487 if (expect_false ((cnt) > (cur))) \ 2100 if (ecb_expect_false ((cnt) > (cur))) \
488 { \ 2101 { \
489 int ocur_ = (cur); \ 2102 ecb_unused int ocur_ = (cur); \
490 (base) = (type *)array_realloc \ 2103 (base) = (type *)array_realloc \
491 (sizeof (type), (base), &(cur), (cnt)); \ 2104 (sizeof (type), (base), &(cur), (cnt)); \
492 init ((base) + (ocur_), (cur) - ocur_); \ 2105 init ((base), ocur_, ((cur) - ocur_)); \
493 } 2106 }
494 2107
495#if 0 2108#if 0
496#define array_slim(type,stem) \ 2109#define array_slim(type,stem) \
497 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2110 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
501 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 2114 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
502 } 2115 }
503#endif 2116#endif
504 2117
505#define array_free(stem, idx) \ 2118#define array_free(stem, idx) \
506 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 2119 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
507 2120
508/*****************************************************************************/ 2121/*****************************************************************************/
509 2122
510void noinline 2123/* dummy callback for pending events */
2124ecb_noinline
2125static void
2126pendingcb (EV_P_ ev_prepare *w, int revents)
2127{
2128}
2129
2130ecb_noinline
2131void
511ev_feed_event (EV_P_ void *w, int revents) 2132ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
512{ 2133{
513 W w_ = (W)w; 2134 W w_ = (W)w;
514 int pri = ABSPRI (w_); 2135 int pri = ABSPRI (w_);
515 2136
516 if (expect_false (w_->pending)) 2137 if (ecb_expect_false (w_->pending))
517 pendings [pri][w_->pending - 1].events |= revents; 2138 pendings [pri][w_->pending - 1].events |= revents;
518 else 2139 else
519 { 2140 {
520 w_->pending = ++pendingcnt [pri]; 2141 w_->pending = ++pendingcnt [pri];
521 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2142 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
522 pendings [pri][w_->pending - 1].w = w_; 2143 pendings [pri][w_->pending - 1].w = w_;
523 pendings [pri][w_->pending - 1].events = revents; 2144 pendings [pri][w_->pending - 1].events = revents;
524 } 2145 }
525}
526 2146
527void inline_speed 2147 pendingpri = NUMPRI - 1;
2148}
2149
2150inline_speed void
2151feed_reverse (EV_P_ W w)
2152{
2153 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
2154 rfeeds [rfeedcnt++] = w;
2155}
2156
2157inline_size void
2158feed_reverse_done (EV_P_ int revents)
2159{
2160 do
2161 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2162 while (rfeedcnt);
2163}
2164
2165inline_speed void
528queue_events (EV_P_ W *events, int eventcnt, int type) 2166queue_events (EV_P_ W *events, int eventcnt, int type)
529{ 2167{
530 int i; 2168 int i;
531 2169
532 for (i = 0; i < eventcnt; ++i) 2170 for (i = 0; i < eventcnt; ++i)
533 ev_feed_event (EV_A_ events [i], type); 2171 ev_feed_event (EV_A_ events [i], type);
534} 2172}
535 2173
536/*****************************************************************************/ 2174/*****************************************************************************/
537 2175
538void inline_size 2176inline_speed void
539anfds_init (ANFD *base, int count)
540{
541 while (count--)
542 {
543 base->head = 0;
544 base->events = EV_NONE;
545 base->reify = 0;
546
547 ++base;
548 }
549}
550
551void inline_speed
552fd_event (EV_P_ int fd, int revents) 2177fd_event_nocheck (EV_P_ int fd, int revents)
553{ 2178{
554 ANFD *anfd = anfds + fd; 2179 ANFD *anfd = anfds + fd;
555 ev_io *w; 2180 ev_io *w;
556 2181
557 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2182 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
561 if (ev) 2186 if (ev)
562 ev_feed_event (EV_A_ (W)w, ev); 2187 ev_feed_event (EV_A_ (W)w, ev);
563 } 2188 }
564} 2189}
565 2190
566void 2191/* do not submit kernel events for fds that have reify set */
2192/* because that means they changed while we were polling for new events */
2193inline_speed void
567ev_feed_fd_event (EV_P_ int fd, int revents) 2194fd_event (EV_P_ int fd, int revents)
2195{
2196 ANFD *anfd = anfds + fd;
2197
2198 if (ecb_expect_true (!anfd->reify))
2199 fd_event_nocheck (EV_A_ fd, revents);
2200}
2201
2202void
2203ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
568{ 2204{
569 if (fd >= 0 && fd < anfdmax) 2205 if (fd >= 0 && fd < anfdmax)
570 fd_event (EV_A_ fd, revents); 2206 fd_event_nocheck (EV_A_ fd, revents);
571} 2207}
572 2208
573void inline_size 2209/* make sure the external fd watch events are in-sync */
2210/* with the kernel/libev internal state */
2211inline_size void
574fd_reify (EV_P) 2212fd_reify (EV_P)
575{ 2213{
576 int i; 2214 int i;
2215
2216#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2217 for (i = 0; i < fdchangecnt; ++i)
2218 {
2219 int fd = fdchanges [i];
2220 ANFD *anfd = anfds + fd;
2221
2222 if (anfd->reify & EV__IOFDSET && anfd->head)
2223 {
2224 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2225
2226 if (handle != anfd->handle)
2227 {
2228 unsigned long arg;
2229
2230 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2231
2232 /* handle changed, but fd didn't - we need to do it in two steps */
2233 backend_modify (EV_A_ fd, anfd->events, 0);
2234 anfd->events = 0;
2235 anfd->handle = handle;
2236 }
2237 }
2238 }
2239#endif
577 2240
578 for (i = 0; i < fdchangecnt; ++i) 2241 for (i = 0; i < fdchangecnt; ++i)
579 { 2242 {
580 int fd = fdchanges [i]; 2243 int fd = fdchanges [i];
581 ANFD *anfd = anfds + fd; 2244 ANFD *anfd = anfds + fd;
582 ev_io *w; 2245 ev_io *w;
583 2246
584 unsigned char events = 0; 2247 unsigned char o_events = anfd->events;
2248 unsigned char o_reify = anfd->reify;
585 2249
586 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2250 anfd->reify = 0;
587 events |= (unsigned char)w->events;
588 2251
589#if EV_SELECT_IS_WINSOCKET 2252 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
590 if (events)
591 { 2253 {
592 unsigned long argp; 2254 anfd->events = 0;
593 anfd->handle = _get_osfhandle (fd); 2255
594 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 2256 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2257 anfd->events |= (unsigned char)w->events;
2258
2259 if (o_events != anfd->events)
2260 o_reify = EV__IOFDSET; /* actually |= */
595 } 2261 }
596#endif
597 2262
598 { 2263 if (o_reify & EV__IOFDSET)
599 unsigned char o_events = anfd->events;
600 unsigned char o_reify = anfd->reify;
601
602 anfd->reify = 0;
603 anfd->events = events;
604
605 if (o_events != events || o_reify & EV_IOFDSET)
606 backend_modify (EV_A_ fd, o_events, events); 2264 backend_modify (EV_A_ fd, o_events, anfd->events);
607 }
608 } 2265 }
609 2266
610 fdchangecnt = 0; 2267 fdchangecnt = 0;
611} 2268}
612 2269
2270/* something about the given fd changed */
613void inline_size 2271inline_size
2272void
614fd_change (EV_P_ int fd, int flags) 2273fd_change (EV_P_ int fd, int flags)
615{ 2274{
616 unsigned char reify = anfds [fd].reify; 2275 unsigned char reify = anfds [fd].reify;
617 anfds [fd].reify |= flags; 2276 anfds [fd].reify |= flags;
618 2277
619 if (expect_true (!reify)) 2278 if (ecb_expect_true (!reify))
620 { 2279 {
621 ++fdchangecnt; 2280 ++fdchangecnt;
622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2281 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
623 fdchanges [fdchangecnt - 1] = fd; 2282 fdchanges [fdchangecnt - 1] = fd;
624 } 2283 }
625} 2284}
626 2285
627void inline_speed 2286/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2287inline_speed ecb_cold void
628fd_kill (EV_P_ int fd) 2288fd_kill (EV_P_ int fd)
629{ 2289{
630 ev_io *w; 2290 ev_io *w;
631 2291
632 while ((w = (ev_io *)anfds [fd].head)) 2292 while ((w = (ev_io *)anfds [fd].head))
… …
634 ev_io_stop (EV_A_ w); 2294 ev_io_stop (EV_A_ w);
635 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2295 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
636 } 2296 }
637} 2297}
638 2298
639int inline_size 2299/* check whether the given fd is actually valid, for error recovery */
2300inline_size ecb_cold int
640fd_valid (int fd) 2301fd_valid (int fd)
641{ 2302{
642#ifdef _WIN32 2303#ifdef _WIN32
643 return _get_osfhandle (fd) != -1; 2304 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
644#else 2305#else
645 return fcntl (fd, F_GETFD) != -1; 2306 return fcntl (fd, F_GETFD) != -1;
646#endif 2307#endif
647} 2308}
648 2309
649/* called on EBADF to verify fds */ 2310/* called on EBADF to verify fds */
650static void noinline 2311ecb_noinline ecb_cold
2312static void
651fd_ebadf (EV_P) 2313fd_ebadf (EV_P)
652{ 2314{
653 int fd; 2315 int fd;
654 2316
655 for (fd = 0; fd < anfdmax; ++fd) 2317 for (fd = 0; fd < anfdmax; ++fd)
656 if (anfds [fd].events) 2318 if (anfds [fd].events)
657 if (!fd_valid (fd) == -1 && errno == EBADF) 2319 if (!fd_valid (fd) && errno == EBADF)
658 fd_kill (EV_A_ fd); 2320 fd_kill (EV_A_ fd);
659} 2321}
660 2322
661/* called on ENOMEM in select/poll to kill some fds and retry */ 2323/* called on ENOMEM in select/poll to kill some fds and retry */
662static void noinline 2324ecb_noinline ecb_cold
2325static void
663fd_enomem (EV_P) 2326fd_enomem (EV_P)
664{ 2327{
665 int fd; 2328 int fd;
666 2329
667 for (fd = anfdmax; fd--; ) 2330 for (fd = anfdmax; fd--; )
668 if (anfds [fd].events) 2331 if (anfds [fd].events)
669 { 2332 {
670 fd_kill (EV_A_ fd); 2333 fd_kill (EV_A_ fd);
671 return; 2334 break;
672 } 2335 }
673} 2336}
674 2337
675/* usually called after fork if backend needs to re-arm all fds from scratch */ 2338/* usually called after fork if backend needs to re-arm all fds from scratch */
676static void noinline 2339ecb_noinline
2340static void
677fd_rearm_all (EV_P) 2341fd_rearm_all (EV_P)
678{ 2342{
679 int fd; 2343 int fd;
680 2344
681 for (fd = 0; fd < anfdmax; ++fd) 2345 for (fd = 0; fd < anfdmax; ++fd)
682 if (anfds [fd].events) 2346 if (anfds [fd].events)
683 { 2347 {
684 anfds [fd].events = 0; 2348 anfds [fd].events = 0;
2349 anfds [fd].emask = 0;
685 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2350 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
686 } 2351 }
687} 2352}
688 2353
689/*****************************************************************************/ 2354/* used to prepare libev internal fd's */
690 2355/* this is not fork-safe */
691void inline_speed 2356inline_speed void
692upheap (WT *heap, int k)
693{
694 WT w = heap [k];
695
696 while (k)
697 {
698 int p = (k - 1) >> 1;
699
700 if (heap [p]->at <= w->at)
701 break;
702
703 heap [k] = heap [p];
704 ((W)heap [k])->active = k + 1;
705 k = p;
706 }
707
708 heap [k] = w;
709 ((W)heap [k])->active = k + 1;
710}
711
712void inline_speed
713downheap (WT *heap, int N, int k)
714{
715 WT w = heap [k];
716
717 for (;;)
718 {
719 int c = (k << 1) + 1;
720
721 if (c >= N)
722 break;
723
724 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
725 ? 1 : 0;
726
727 if (w->at <= heap [c]->at)
728 break;
729
730 heap [k] = heap [c];
731 ((W)heap [k])->active = k + 1;
732
733 k = c;
734 }
735
736 heap [k] = w;
737 ((W)heap [k])->active = k + 1;
738}
739
740void inline_size
741adjustheap (WT *heap, int N, int k)
742{
743 upheap (heap, k);
744 downheap (heap, N, k);
745}
746
747/*****************************************************************************/
748
749typedef struct
750{
751 WL head;
752 sig_atomic_t volatile gotsig;
753} ANSIG;
754
755static ANSIG *signals;
756static int signalmax;
757
758static int sigpipe [2];
759static sig_atomic_t volatile gotsig;
760static ev_io sigev;
761
762void inline_size
763signals_init (ANSIG *base, int count)
764{
765 while (count--)
766 {
767 base->head = 0;
768 base->gotsig = 0;
769
770 ++base;
771 }
772}
773
774static void
775sighandler (int signum)
776{
777#if _WIN32
778 signal (signum, sighandler);
779#endif
780
781 signals [signum - 1].gotsig = 1;
782
783 if (!gotsig)
784 {
785 int old_errno = errno;
786 gotsig = 1;
787 write (sigpipe [1], &signum, 1);
788 errno = old_errno;
789 }
790}
791
792void noinline
793ev_feed_signal_event (EV_P_ int signum)
794{
795 WL w;
796
797#if EV_MULTIPLICITY
798 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
799#endif
800
801 --signum;
802
803 if (signum < 0 || signum >= signalmax)
804 return;
805
806 signals [signum].gotsig = 0;
807
808 for (w = signals [signum].head; w; w = w->next)
809 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
810}
811
812static void
813sigcb (EV_P_ ev_io *iow, int revents)
814{
815 int signum;
816
817 read (sigpipe [0], &revents, 1);
818 gotsig = 0;
819
820 for (signum = signalmax; signum--; )
821 if (signals [signum].gotsig)
822 ev_feed_signal_event (EV_A_ signum + 1);
823}
824
825void inline_speed
826fd_intern (int fd) 2357fd_intern (int fd)
827{ 2358{
828#ifdef _WIN32 2359#ifdef _WIN32
829 int arg = 1; 2360 unsigned long arg = 1;
830 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 2361 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
831#else 2362#else
832 fcntl (fd, F_SETFD, FD_CLOEXEC); 2363 fcntl (fd, F_SETFD, FD_CLOEXEC);
833 fcntl (fd, F_SETFL, O_NONBLOCK); 2364 fcntl (fd, F_SETFL, O_NONBLOCK);
834#endif 2365#endif
835} 2366}
836 2367
837static void noinline
838siginit (EV_P)
839{
840 fd_intern (sigpipe [0]);
841 fd_intern (sigpipe [1]);
842
843 ev_io_set (&sigev, sigpipe [0], EV_READ);
844 ev_io_start (EV_A_ &sigev);
845 ev_unref (EV_A); /* child watcher should not keep loop alive */
846}
847
848/*****************************************************************************/ 2368/*****************************************************************************/
849 2369
2370/*
2371 * the heap functions want a real array index. array index 0 is guaranteed to not
2372 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2373 * the branching factor of the d-tree.
2374 */
2375
2376/*
2377 * at the moment we allow libev the luxury of two heaps,
2378 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2379 * which is more cache-efficient.
2380 * the difference is about 5% with 50000+ watchers.
2381 */
2382#if EV_USE_4HEAP
2383
2384#define DHEAP 4
2385#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2386#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2387#define UPHEAP_DONE(p,k) ((p) == (k))
2388
2389/* away from the root */
2390inline_speed void
2391downheap (ANHE *heap, int N, int k)
2392{
2393 ANHE he = heap [k];
2394 ANHE *E = heap + N + HEAP0;
2395
2396 for (;;)
2397 {
2398 ev_tstamp minat;
2399 ANHE *minpos;
2400 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2401
2402 /* find minimum child */
2403 if (ecb_expect_true (pos + DHEAP - 1 < E))
2404 {
2405 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2406 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2407 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2408 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2409 }
2410 else if (pos < E)
2411 {
2412 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2413 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2414 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2415 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2416 }
2417 else
2418 break;
2419
2420 if (ANHE_at (he) <= minat)
2421 break;
2422
2423 heap [k] = *minpos;
2424 ev_active (ANHE_w (*minpos)) = k;
2425
2426 k = minpos - heap;
2427 }
2428
2429 heap [k] = he;
2430 ev_active (ANHE_w (he)) = k;
2431}
2432
2433#else /* 4HEAP */
2434
2435#define HEAP0 1
2436#define HPARENT(k) ((k) >> 1)
2437#define UPHEAP_DONE(p,k) (!(p))
2438
2439/* away from the root */
2440inline_speed void
2441downheap (ANHE *heap, int N, int k)
2442{
2443 ANHE he = heap [k];
2444
2445 for (;;)
2446 {
2447 int c = k << 1;
2448
2449 if (c >= N + HEAP0)
2450 break;
2451
2452 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2453 ? 1 : 0;
2454
2455 if (ANHE_at (he) <= ANHE_at (heap [c]))
2456 break;
2457
2458 heap [k] = heap [c];
2459 ev_active (ANHE_w (heap [k])) = k;
2460
2461 k = c;
2462 }
2463
2464 heap [k] = he;
2465 ev_active (ANHE_w (he)) = k;
2466}
2467#endif
2468
2469/* towards the root */
2470inline_speed void
2471upheap (ANHE *heap, int k)
2472{
2473 ANHE he = heap [k];
2474
2475 for (;;)
2476 {
2477 int p = HPARENT (k);
2478
2479 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2480 break;
2481
2482 heap [k] = heap [p];
2483 ev_active (ANHE_w (heap [k])) = k;
2484 k = p;
2485 }
2486
2487 heap [k] = he;
2488 ev_active (ANHE_w (he)) = k;
2489}
2490
2491/* move an element suitably so it is in a correct place */
2492inline_size void
2493adjustheap (ANHE *heap, int N, int k)
2494{
2495 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2496 upheap (heap, k);
2497 else
2498 downheap (heap, N, k);
2499}
2500
2501/* rebuild the heap: this function is used only once and executed rarely */
2502inline_size void
2503reheap (ANHE *heap, int N)
2504{
2505 int i;
2506
2507 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2508 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2509 for (i = 0; i < N; ++i)
2510 upheap (heap, i + HEAP0);
2511}
2512
2513/*****************************************************************************/
2514
2515/* associate signal watchers to a signal signal */
2516typedef struct
2517{
2518 EV_ATOMIC_T pending;
2519#if EV_MULTIPLICITY
2520 EV_P;
2521#endif
2522 WL head;
2523} ANSIG;
2524
2525static ANSIG signals [EV_NSIG - 1];
2526
2527/*****************************************************************************/
2528
2529#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2530
2531ecb_noinline ecb_cold
2532static void
2533evpipe_init (EV_P)
2534{
2535 if (!ev_is_active (&pipe_w))
2536 {
2537 int fds [2];
2538
2539# if EV_USE_EVENTFD
2540 fds [0] = -1;
2541 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2542 if (fds [1] < 0 && errno == EINVAL)
2543 fds [1] = eventfd (0, 0);
2544
2545 if (fds [1] < 0)
2546# endif
2547 {
2548 while (pipe (fds))
2549 ev_syserr ("(libev) error creating signal/async pipe");
2550
2551 fd_intern (fds [0]);
2552 }
2553
2554 evpipe [0] = fds [0];
2555
2556 if (evpipe [1] < 0)
2557 evpipe [1] = fds [1]; /* first call, set write fd */
2558 else
2559 {
2560 /* on subsequent calls, do not change evpipe [1] */
2561 /* so that evpipe_write can always rely on its value. */
2562 /* this branch does not do anything sensible on windows, */
2563 /* so must not be executed on windows */
2564
2565 dup2 (fds [1], evpipe [1]);
2566 close (fds [1]);
2567 }
2568
2569 fd_intern (evpipe [1]);
2570
2571 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2572 ev_io_start (EV_A_ &pipe_w);
2573 ev_unref (EV_A); /* watcher should not keep loop alive */
2574 }
2575}
2576
2577inline_speed void
2578evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2579{
2580 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2581
2582 if (ecb_expect_true (*flag))
2583 return;
2584
2585 *flag = 1;
2586 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2587
2588 pipe_write_skipped = 1;
2589
2590 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2591
2592 if (pipe_write_wanted)
2593 {
2594 int old_errno;
2595
2596 pipe_write_skipped = 0;
2597 ECB_MEMORY_FENCE_RELEASE;
2598
2599 old_errno = errno; /* save errno because write will clobber it */
2600
2601#if EV_USE_EVENTFD
2602 if (evpipe [0] < 0)
2603 {
2604 uint64_t counter = 1;
2605 write (evpipe [1], &counter, sizeof (uint64_t));
2606 }
2607 else
2608#endif
2609 {
2610#ifdef _WIN32
2611 WSABUF buf;
2612 DWORD sent;
2613 buf.buf = (char *)&buf;
2614 buf.len = 1;
2615 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2616#else
2617 write (evpipe [1], &(evpipe [1]), 1);
2618#endif
2619 }
2620
2621 errno = old_errno;
2622 }
2623}
2624
2625/* called whenever the libev signal pipe */
2626/* got some events (signal, async) */
2627static void
2628pipecb (EV_P_ ev_io *iow, int revents)
2629{
2630 int i;
2631
2632 if (revents & EV_READ)
2633 {
2634#if EV_USE_EVENTFD
2635 if (evpipe [0] < 0)
2636 {
2637 uint64_t counter;
2638 read (evpipe [1], &counter, sizeof (uint64_t));
2639 }
2640 else
2641#endif
2642 {
2643 char dummy[4];
2644#ifdef _WIN32
2645 WSABUF buf;
2646 DWORD recvd;
2647 DWORD flags = 0;
2648 buf.buf = dummy;
2649 buf.len = sizeof (dummy);
2650 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2651#else
2652 read (evpipe [0], &dummy, sizeof (dummy));
2653#endif
2654 }
2655 }
2656
2657 pipe_write_skipped = 0;
2658
2659 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2660
2661#if EV_SIGNAL_ENABLE
2662 if (sig_pending)
2663 {
2664 sig_pending = 0;
2665
2666 ECB_MEMORY_FENCE;
2667
2668 for (i = EV_NSIG - 1; i--; )
2669 if (ecb_expect_false (signals [i].pending))
2670 ev_feed_signal_event (EV_A_ i + 1);
2671 }
2672#endif
2673
2674#if EV_ASYNC_ENABLE
2675 if (async_pending)
2676 {
2677 async_pending = 0;
2678
2679 ECB_MEMORY_FENCE;
2680
2681 for (i = asynccnt; i--; )
2682 if (asyncs [i]->sent)
2683 {
2684 asyncs [i]->sent = 0;
2685 ECB_MEMORY_FENCE_RELEASE;
2686 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2687 }
2688 }
2689#endif
2690}
2691
2692/*****************************************************************************/
2693
2694void
2695ev_feed_signal (int signum) EV_NOEXCEPT
2696{
2697#if EV_MULTIPLICITY
2698 EV_P;
2699 ECB_MEMORY_FENCE_ACQUIRE;
2700 EV_A = signals [signum - 1].loop;
2701
2702 if (!EV_A)
2703 return;
2704#endif
2705
2706 signals [signum - 1].pending = 1;
2707 evpipe_write (EV_A_ &sig_pending);
2708}
2709
2710static void
2711ev_sighandler (int signum)
2712{
2713#ifdef _WIN32
2714 signal (signum, ev_sighandler);
2715#endif
2716
2717 ev_feed_signal (signum);
2718}
2719
2720ecb_noinline
2721void
2722ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2723{
2724 WL w;
2725
2726 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
2727 return;
2728
2729 --signum;
2730
2731#if EV_MULTIPLICITY
2732 /* it is permissible to try to feed a signal to the wrong loop */
2733 /* or, likely more useful, feeding a signal nobody is waiting for */
2734
2735 if (ecb_expect_false (signals [signum].loop != EV_A))
2736 return;
2737#endif
2738
2739 signals [signum].pending = 0;
2740 ECB_MEMORY_FENCE_RELEASE;
2741
2742 for (w = signals [signum].head; w; w = w->next)
2743 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2744}
2745
2746#if EV_USE_SIGNALFD
2747static void
2748sigfdcb (EV_P_ ev_io *iow, int revents)
2749{
2750 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2751
2752 for (;;)
2753 {
2754 ssize_t res = read (sigfd, si, sizeof (si));
2755
2756 /* not ISO-C, as res might be -1, but works with SuS */
2757 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2758 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2759
2760 if (res < (ssize_t)sizeof (si))
2761 break;
2762 }
2763}
2764#endif
2765
2766#endif
2767
2768/*****************************************************************************/
2769
2770#if EV_CHILD_ENABLE
850static WL childs [EV_PID_HASHSIZE]; 2771static WL childs [EV_PID_HASHSIZE];
851 2772
852#ifndef _WIN32
853
854static ev_signal childev; 2773static ev_signal childev;
855 2774
856void inline_speed 2775#ifndef WIFCONTINUED
2776# define WIFCONTINUED(status) 0
2777#endif
2778
2779/* handle a single child status event */
2780inline_speed void
857child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2781child_reap (EV_P_ int chain, int pid, int status)
858{ 2782{
859 ev_child *w; 2783 ev_child *w;
2784 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
860 2785
861 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2786 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2787 {
862 if (w->pid == pid || !w->pid) 2788 if ((w->pid == pid || !w->pid)
2789 && (!traced || (w->flags & 1)))
863 { 2790 {
864 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2791 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
865 w->rpid = pid; 2792 w->rpid = pid;
866 w->rstatus = status; 2793 w->rstatus = status;
867 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2794 ev_feed_event (EV_A_ (W)w, EV_CHILD);
868 } 2795 }
2796 }
869} 2797}
870 2798
871#ifndef WCONTINUED 2799#ifndef WCONTINUED
872# define WCONTINUED 0 2800# define WCONTINUED 0
873#endif 2801#endif
874 2802
2803/* called on sigchld etc., calls waitpid */
875static void 2804static void
876childcb (EV_P_ ev_signal *sw, int revents) 2805childcb (EV_P_ ev_signal *sw, int revents)
877{ 2806{
878 int pid, status; 2807 int pid, status;
879 2808
… …
882 if (!WCONTINUED 2811 if (!WCONTINUED
883 || errno != EINVAL 2812 || errno != EINVAL
884 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2813 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
885 return; 2814 return;
886 2815
887 /* make sure we are called again until all childs have been reaped */ 2816 /* make sure we are called again until all children have been reaped */
888 /* we need to do it this way so that the callback gets called before we continue */ 2817 /* we need to do it this way so that the callback gets called before we continue */
889 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2818 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
890 2819
891 child_reap (EV_A_ sw, pid, pid, status); 2820 child_reap (EV_A_ pid, pid, status);
892 if (EV_PID_HASHSIZE > 1) 2821 if ((EV_PID_HASHSIZE) > 1)
893 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2822 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
894} 2823}
895 2824
896#endif 2825#endif
897 2826
898/*****************************************************************************/ 2827/*****************************************************************************/
899 2828
2829#if EV_USE_IOCP
2830# include "ev_iocp.c"
2831#endif
900#if EV_USE_PORT 2832#if EV_USE_PORT
901# include "ev_port.c" 2833# include "ev_port.c"
902#endif 2834#endif
903#if EV_USE_KQUEUE 2835#if EV_USE_KQUEUE
904# include "ev_kqueue.c" 2836# include "ev_kqueue.c"
905#endif 2837#endif
906#if EV_USE_EPOLL 2838#if EV_USE_EPOLL
907# include "ev_epoll.c" 2839# include "ev_epoll.c"
908#endif 2840#endif
2841#if EV_USE_LINUXAIO
2842# include "ev_linuxaio.c"
2843#endif
2844#if EV_USE_IOURING
2845# include "ev_iouring.c"
2846#endif
909#if EV_USE_POLL 2847#if EV_USE_POLL
910# include "ev_poll.c" 2848# include "ev_poll.c"
911#endif 2849#endif
912#if EV_USE_SELECT 2850#if EV_USE_SELECT
913# include "ev_select.c" 2851# include "ev_select.c"
914#endif 2852#endif
915 2853
916int 2854ecb_cold int
917ev_version_major (void) 2855ev_version_major (void) EV_NOEXCEPT
918{ 2856{
919 return EV_VERSION_MAJOR; 2857 return EV_VERSION_MAJOR;
920} 2858}
921 2859
922int 2860ecb_cold int
923ev_version_minor (void) 2861ev_version_minor (void) EV_NOEXCEPT
924{ 2862{
925 return EV_VERSION_MINOR; 2863 return EV_VERSION_MINOR;
926} 2864}
927 2865
928/* return true if we are running with elevated privileges and should ignore env variables */ 2866/* return true if we are running with elevated privileges and should ignore env variables */
929int inline_size 2867inline_size ecb_cold int
930enable_secure (void) 2868enable_secure (void)
931{ 2869{
932#ifdef _WIN32 2870#ifdef _WIN32
933 return 0; 2871 return 0;
934#else 2872#else
935 return getuid () != geteuid () 2873 return getuid () != geteuid ()
936 || getgid () != getegid (); 2874 || getgid () != getegid ();
937#endif 2875#endif
938} 2876}
939 2877
2878ecb_cold
940unsigned int 2879unsigned int
941ev_supported_backends (void) 2880ev_supported_backends (void) EV_NOEXCEPT
942{ 2881{
943 unsigned int flags = 0; 2882 unsigned int flags = 0;
944 2883
945 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2884 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
946 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2885 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
947 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2886 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2887 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2888 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
948 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2889 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
949 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2890 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
950 2891
951 return flags; 2892 return flags;
952} 2893}
953 2894
2895ecb_cold
954unsigned int 2896unsigned int
955ev_recommended_backends (void) 2897ev_recommended_backends (void) EV_NOEXCEPT
956{ 2898{
957 unsigned int flags = ev_supported_backends (); 2899 unsigned int flags = ev_supported_backends ();
958 2900
959#ifndef __NetBSD__ 2901#ifndef __NetBSD__
960 /* kqueue is borked on everything but netbsd apparently */ 2902 /* kqueue is borked on everything but netbsd apparently */
961 /* it usually doesn't work correctly on anything but sockets and pipes */ 2903 /* it usually doesn't work correctly on anything but sockets and pipes */
962 flags &= ~EVBACKEND_KQUEUE; 2904 flags &= ~EVBACKEND_KQUEUE;
963#endif 2905#endif
964#ifdef __APPLE__ 2906#ifdef __APPLE__
965 // flags &= ~EVBACKEND_KQUEUE; for documentation 2907 /* only select works correctly on that "unix-certified" platform */
2908 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2909 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2910#endif
2911#ifdef __FreeBSD__
2912 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2913#endif
2914
2915 /* TODO: linuxaio is very experimental */
2916#if !EV_RECOMMEND_LINUXAIO
2917 flags &= ~EVBACKEND_LINUXAIO;
2918#endif
2919 /* TODO: linuxaio is super experimental */
2920#if !EV_RECOMMEND_IOURING
966 flags &= ~EVBACKEND_POLL; 2921 flags &= ~EVBACKEND_IOURING;
967#endif 2922#endif
968 2923
969 return flags; 2924 return flags;
970} 2925}
971 2926
2927ecb_cold
972unsigned int 2928unsigned int
973ev_embeddable_backends (void) 2929ev_embeddable_backends (void) EV_NOEXCEPT
974{ 2930{
2931 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2932
975 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2933 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
976 return EVBACKEND_KQUEUE 2934 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
977 | EVBACKEND_PORT; 2935 flags &= ~EVBACKEND_EPOLL;
2936
2937 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2938
2939 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2940 * because our backend_fd is the epoll fd we need as fallback.
2941 * if the kernel ever is fixed, this might change...
2942 */
2943
2944 return flags;
978} 2945}
979 2946
980unsigned int 2947unsigned int
981ev_backend (EV_P) 2948ev_backend (EV_P) EV_NOEXCEPT
982{ 2949{
983 return backend; 2950 return backend;
984} 2951}
985 2952
2953#if EV_FEATURE_API
986unsigned int 2954unsigned int
987ev_loop_count (EV_P) 2955ev_iteration (EV_P) EV_NOEXCEPT
988{ 2956{
989 return loop_count; 2957 return loop_count;
990} 2958}
991 2959
2960unsigned int
2961ev_depth (EV_P) EV_NOEXCEPT
2962{
2963 return loop_depth;
2964}
2965
992void 2966void
993ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2967ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
994{ 2968{
995 io_blocktime = interval; 2969 io_blocktime = interval;
996} 2970}
997 2971
998void 2972void
999ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2973ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1000{ 2974{
1001 timeout_blocktime = interval; 2975 timeout_blocktime = interval;
1002} 2976}
1003 2977
1004static void noinline 2978void
2979ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2980{
2981 userdata = data;
2982}
2983
2984void *
2985ev_userdata (EV_P) EV_NOEXCEPT
2986{
2987 return userdata;
2988}
2989
2990void
2991ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2992{
2993 invoke_cb = invoke_pending_cb;
2994}
2995
2996void
2997ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2998{
2999 release_cb = release;
3000 acquire_cb = acquire;
3001}
3002#endif
3003
3004/* initialise a loop structure, must be zero-initialised */
3005ecb_noinline ecb_cold
3006static void
1005loop_init (EV_P_ unsigned int flags) 3007loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1006{ 3008{
1007 if (!backend) 3009 if (!backend)
1008 { 3010 {
3011 origflags = flags;
3012
3013#if EV_USE_REALTIME
3014 if (!have_realtime)
3015 {
3016 struct timespec ts;
3017
3018 if (!clock_gettime (CLOCK_REALTIME, &ts))
3019 have_realtime = 1;
3020 }
3021#endif
3022
1009#if EV_USE_MONOTONIC 3023#if EV_USE_MONOTONIC
3024 if (!have_monotonic)
1010 { 3025 {
1011 struct timespec ts; 3026 struct timespec ts;
3027
1012 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3028 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1013 have_monotonic = 1; 3029 have_monotonic = 1;
1014 } 3030 }
1015#endif 3031#endif
1016
1017 ev_rt_now = ev_time ();
1018 mn_now = get_clock ();
1019 now_floor = mn_now;
1020 rtmn_diff = ev_rt_now - mn_now;
1021
1022 io_blocktime = 0.;
1023 timeout_blocktime = 0.;
1024 3032
1025 /* pid check not overridable via env */ 3033 /* pid check not overridable via env */
1026#ifndef _WIN32 3034#ifndef _WIN32
1027 if (flags & EVFLAG_FORKCHECK) 3035 if (flags & EVFLAG_FORKCHECK)
1028 curpid = getpid (); 3036 curpid = getpid ();
… …
1031 if (!(flags & EVFLAG_NOENV) 3039 if (!(flags & EVFLAG_NOENV)
1032 && !enable_secure () 3040 && !enable_secure ()
1033 && getenv ("LIBEV_FLAGS")) 3041 && getenv ("LIBEV_FLAGS"))
1034 flags = atoi (getenv ("LIBEV_FLAGS")); 3042 flags = atoi (getenv ("LIBEV_FLAGS"));
1035 3043
1036 if (!(flags & 0x0000ffffUL)) 3044 ev_rt_now = ev_time ();
3045 mn_now = get_clock ();
3046 now_floor = mn_now;
3047 rtmn_diff = ev_rt_now - mn_now;
3048#if EV_FEATURE_API
3049 invoke_cb = ev_invoke_pending;
3050#endif
3051
3052 io_blocktime = 0.;
3053 timeout_blocktime = 0.;
3054 backend = 0;
3055 backend_fd = -1;
3056 sig_pending = 0;
3057#if EV_ASYNC_ENABLE
3058 async_pending = 0;
3059#endif
3060 pipe_write_skipped = 0;
3061 pipe_write_wanted = 0;
3062 evpipe [0] = -1;
3063 evpipe [1] = -1;
3064#if EV_USE_INOTIFY
3065 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3066#endif
3067#if EV_USE_SIGNALFD
3068 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3069#endif
3070
3071 if (!(flags & EVBACKEND_MASK))
1037 flags |= ev_recommended_backends (); 3072 flags |= ev_recommended_backends ();
1038 3073
1039 backend = 0;
1040 backend_fd = -1;
1041#if EV_USE_INOTIFY 3074#if EV_USE_IOCP
1042 fs_fd = -2; 3075 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1043#endif 3076#endif
1044
1045#if EV_USE_PORT 3077#if EV_USE_PORT
1046 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3078 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1047#endif 3079#endif
1048#if EV_USE_KQUEUE 3080#if EV_USE_KQUEUE
1049 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3081 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3082#endif
3083#if EV_USE_IOURING
3084 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3085#endif
3086#if EV_USE_LINUXAIO
3087 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1050#endif 3088#endif
1051#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
1052 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3090 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1053#endif 3091#endif
1054#if EV_USE_POLL 3092#if EV_USE_POLL
1055 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3093 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1056#endif 3094#endif
1057#if EV_USE_SELECT 3095#if EV_USE_SELECT
1058 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3096 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1059#endif 3097#endif
1060 3098
3099 ev_prepare_init (&pending_w, pendingcb);
3100
3101#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1061 ev_init (&sigev, sigcb); 3102 ev_init (&pipe_w, pipecb);
1062 ev_set_priority (&sigev, EV_MAXPRI); 3103 ev_set_priority (&pipe_w, EV_MAXPRI);
3104#endif
1063 } 3105 }
1064} 3106}
1065 3107
1066static void noinline 3108/* free up a loop structure */
3109ecb_cold
3110void
1067loop_destroy (EV_P) 3111ev_loop_destroy (EV_P)
1068{ 3112{
1069 int i; 3113 int i;
3114
3115#if EV_MULTIPLICITY
3116 /* mimic free (0) */
3117 if (!EV_A)
3118 return;
3119#endif
3120
3121#if EV_CLEANUP_ENABLE
3122 /* queue cleanup watchers (and execute them) */
3123 if (ecb_expect_false (cleanupcnt))
3124 {
3125 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3126 EV_INVOKE_PENDING;
3127 }
3128#endif
3129
3130#if EV_CHILD_ENABLE
3131 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3132 {
3133 ev_ref (EV_A); /* child watcher */
3134 ev_signal_stop (EV_A_ &childev);
3135 }
3136#endif
3137
3138 if (ev_is_active (&pipe_w))
3139 {
3140 /*ev_ref (EV_A);*/
3141 /*ev_io_stop (EV_A_ &pipe_w);*/
3142
3143 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3144 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3145 }
3146
3147#if EV_USE_SIGNALFD
3148 if (ev_is_active (&sigfd_w))
3149 close (sigfd);
3150#endif
1070 3151
1071#if EV_USE_INOTIFY 3152#if EV_USE_INOTIFY
1072 if (fs_fd >= 0) 3153 if (fs_fd >= 0)
1073 close (fs_fd); 3154 close (fs_fd);
1074#endif 3155#endif
1075 3156
1076 if (backend_fd >= 0) 3157 if (backend_fd >= 0)
1077 close (backend_fd); 3158 close (backend_fd);
1078 3159
3160#if EV_USE_IOCP
3161 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3162#endif
1079#if EV_USE_PORT 3163#if EV_USE_PORT
1080 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3164 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1081#endif 3165#endif
1082#if EV_USE_KQUEUE 3166#if EV_USE_KQUEUE
1083 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3167 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3168#endif
3169#if EV_USE_IOURING
3170 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3171#endif
3172#if EV_USE_LINUXAIO
3173 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1084#endif 3174#endif
1085#if EV_USE_EPOLL 3175#if EV_USE_EPOLL
1086 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3176 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1087#endif 3177#endif
1088#if EV_USE_POLL 3178#if EV_USE_POLL
1089 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3179 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1090#endif 3180#endif
1091#if EV_USE_SELECT 3181#if EV_USE_SELECT
1092 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3182 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1093#endif 3183#endif
1094 3184
1095 for (i = NUMPRI; i--; ) 3185 for (i = NUMPRI; i--; )
1096 { 3186 {
1097 array_free (pending, [i]); 3187 array_free (pending, [i]);
1098#if EV_IDLE_ENABLE 3188#if EV_IDLE_ENABLE
1099 array_free (idle, [i]); 3189 array_free (idle, [i]);
1100#endif 3190#endif
1101 } 3191 }
1102 3192
1103 ev_free (anfds); anfdmax = 0; 3193 ev_free (anfds); anfds = 0; anfdmax = 0;
1104 3194
1105 /* have to use the microsoft-never-gets-it-right macro */ 3195 /* have to use the microsoft-never-gets-it-right macro */
3196 array_free (rfeed, EMPTY);
1106 array_free (fdchange, EMPTY); 3197 array_free (fdchange, EMPTY);
1107 array_free (timer, EMPTY); 3198 array_free (timer, EMPTY);
1108#if EV_PERIODIC_ENABLE 3199#if EV_PERIODIC_ENABLE
1109 array_free (periodic, EMPTY); 3200 array_free (periodic, EMPTY);
1110#endif 3201#endif
1111#if EV_FORK_ENABLE 3202#if EV_FORK_ENABLE
1112 array_free (fork, EMPTY); 3203 array_free (fork, EMPTY);
1113#endif 3204#endif
3205#if EV_CLEANUP_ENABLE
3206 array_free (cleanup, EMPTY);
3207#endif
1114 array_free (prepare, EMPTY); 3208 array_free (prepare, EMPTY);
1115 array_free (check, EMPTY); 3209 array_free (check, EMPTY);
3210#if EV_ASYNC_ENABLE
3211 array_free (async, EMPTY);
3212#endif
1116 3213
1117 backend = 0; 3214 backend = 0;
1118}
1119 3215
3216#if EV_MULTIPLICITY
3217 if (ev_is_default_loop (EV_A))
3218#endif
3219 ev_default_loop_ptr = 0;
3220#if EV_MULTIPLICITY
3221 else
3222 ev_free (EV_A);
3223#endif
3224}
3225
3226#if EV_USE_INOTIFY
1120void inline_size infy_fork (EV_P); 3227inline_size void infy_fork (EV_P);
3228#endif
1121 3229
1122void inline_size 3230inline_size void
1123loop_fork (EV_P) 3231loop_fork (EV_P)
1124{ 3232{
1125#if EV_USE_PORT 3233#if EV_USE_PORT
1126 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3234 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1127#endif 3235#endif
1128#if EV_USE_KQUEUE 3236#if EV_USE_KQUEUE
1129 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3237 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3238#endif
3239#if EV_USE_IOURING
3240 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3241#endif
3242#if EV_USE_LINUXAIO
3243 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1130#endif 3244#endif
1131#if EV_USE_EPOLL 3245#if EV_USE_EPOLL
1132 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3246 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1133#endif 3247#endif
1134#if EV_USE_INOTIFY 3248#if EV_USE_INOTIFY
1135 infy_fork (EV_A); 3249 infy_fork (EV_A);
1136#endif 3250#endif
1137 3251
1138 if (ev_is_active (&sigev)) 3252#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3253 if (ev_is_active (&pipe_w) && postfork != 2)
1139 { 3254 {
1140 /* default loop */ 3255 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1141 3256
1142 ev_ref (EV_A); 3257 ev_ref (EV_A);
1143 ev_io_stop (EV_A_ &sigev); 3258 ev_io_stop (EV_A_ &pipe_w);
1144 close (sigpipe [0]);
1145 close (sigpipe [1]);
1146 3259
1147 while (pipe (sigpipe)) 3260 if (evpipe [0] >= 0)
1148 syserr ("(libev) error creating pipe"); 3261 EV_WIN32_CLOSE_FD (evpipe [0]);
1149 3262
1150 siginit (EV_A); 3263 evpipe_init (EV_A);
3264 /* iterate over everything, in case we missed something before */
3265 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1151 } 3266 }
3267#endif
1152 3268
1153 postfork = 0; 3269 postfork = 0;
1154} 3270}
1155 3271
1156#if EV_MULTIPLICITY 3272#if EV_MULTIPLICITY
3273
3274ecb_cold
1157struct ev_loop * 3275struct ev_loop *
1158ev_loop_new (unsigned int flags) 3276ev_loop_new (unsigned int flags) EV_NOEXCEPT
1159{ 3277{
1160 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3278 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1161 3279
1162 memset (loop, 0, sizeof (struct ev_loop)); 3280 memset (EV_A, 0, sizeof (struct ev_loop));
1163
1164 loop_init (EV_A_ flags); 3281 loop_init (EV_A_ flags);
1165 3282
1166 if (ev_backend (EV_A)) 3283 if (ev_backend (EV_A))
1167 return loop; 3284 return EV_A;
1168 3285
3286 ev_free (EV_A);
1169 return 0; 3287 return 0;
1170} 3288}
1171 3289
1172void 3290#endif /* multiplicity */
1173ev_loop_destroy (EV_P)
1174{
1175 loop_destroy (EV_A);
1176 ev_free (loop);
1177}
1178 3291
1179void 3292#if EV_VERIFY
1180ev_loop_fork (EV_P) 3293ecb_noinline ecb_cold
3294static void
3295verify_watcher (EV_P_ W w)
1181{ 3296{
1182 postfork = 1; 3297 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1183}
1184 3298
3299 if (w->pending)
3300 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3301}
3302
3303ecb_noinline ecb_cold
3304static void
3305verify_heap (EV_P_ ANHE *heap, int N)
3306{
3307 int i;
3308
3309 for (i = HEAP0; i < N + HEAP0; ++i)
3310 {
3311 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3312 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3313 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3314
3315 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3316 }
3317}
3318
3319ecb_noinline ecb_cold
3320static void
3321array_verify (EV_P_ W *ws, int cnt)
3322{
3323 while (cnt--)
3324 {
3325 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3326 verify_watcher (EV_A_ ws [cnt]);
3327 }
3328}
3329#endif
3330
3331#if EV_FEATURE_API
3332void ecb_cold
3333ev_verify (EV_P) EV_NOEXCEPT
3334{
3335#if EV_VERIFY
3336 int i;
3337 WL w, w2;
3338
3339 assert (activecnt >= -1);
3340
3341 assert (fdchangemax >= fdchangecnt);
3342 for (i = 0; i < fdchangecnt; ++i)
3343 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3344
3345 assert (anfdmax >= 0);
3346 for (i = 0; i < anfdmax; ++i)
3347 {
3348 int j = 0;
3349
3350 for (w = w2 = anfds [i].head; w; w = w->next)
3351 {
3352 verify_watcher (EV_A_ (W)w);
3353
3354 if (j++ & 1)
3355 {
3356 assert (("libev: io watcher list contains a loop", w != w2));
3357 w2 = w2->next;
3358 }
3359
3360 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3361 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3362 }
3363 }
3364
3365 assert (timermax >= timercnt);
3366 verify_heap (EV_A_ timers, timercnt);
3367
3368#if EV_PERIODIC_ENABLE
3369 assert (periodicmax >= periodiccnt);
3370 verify_heap (EV_A_ periodics, periodiccnt);
3371#endif
3372
3373 for (i = NUMPRI; i--; )
3374 {
3375 assert (pendingmax [i] >= pendingcnt [i]);
3376#if EV_IDLE_ENABLE
3377 assert (idleall >= 0);
3378 assert (idlemax [i] >= idlecnt [i]);
3379 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3380#endif
3381 }
3382
3383#if EV_FORK_ENABLE
3384 assert (forkmax >= forkcnt);
3385 array_verify (EV_A_ (W *)forks, forkcnt);
3386#endif
3387
3388#if EV_CLEANUP_ENABLE
3389 assert (cleanupmax >= cleanupcnt);
3390 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3391#endif
3392
3393#if EV_ASYNC_ENABLE
3394 assert (asyncmax >= asynccnt);
3395 array_verify (EV_A_ (W *)asyncs, asynccnt);
3396#endif
3397
3398#if EV_PREPARE_ENABLE
3399 assert (preparemax >= preparecnt);
3400 array_verify (EV_A_ (W *)prepares, preparecnt);
3401#endif
3402
3403#if EV_CHECK_ENABLE
3404 assert (checkmax >= checkcnt);
3405 array_verify (EV_A_ (W *)checks, checkcnt);
3406#endif
3407
3408# if 0
3409#if EV_CHILD_ENABLE
3410 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3411 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3412#endif
3413# endif
3414#endif
3415}
1185#endif 3416#endif
1186 3417
1187#if EV_MULTIPLICITY 3418#if EV_MULTIPLICITY
3419ecb_cold
1188struct ev_loop * 3420struct ev_loop *
1189ev_default_loop_init (unsigned int flags)
1190#else 3421#else
1191int 3422int
3423#endif
1192ev_default_loop (unsigned int flags) 3424ev_default_loop (unsigned int flags) EV_NOEXCEPT
1193#endif
1194{ 3425{
1195 if (sigpipe [0] == sigpipe [1])
1196 if (pipe (sigpipe))
1197 return 0;
1198
1199 if (!ev_default_loop_ptr) 3426 if (!ev_default_loop_ptr)
1200 { 3427 {
1201#if EV_MULTIPLICITY 3428#if EV_MULTIPLICITY
1202 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3429 EV_P = ev_default_loop_ptr = &default_loop_struct;
1203#else 3430#else
1204 ev_default_loop_ptr = 1; 3431 ev_default_loop_ptr = 1;
1205#endif 3432#endif
1206 3433
1207 loop_init (EV_A_ flags); 3434 loop_init (EV_A_ flags);
1208 3435
1209 if (ev_backend (EV_A)) 3436 if (ev_backend (EV_A))
1210 { 3437 {
1211 siginit (EV_A); 3438#if EV_CHILD_ENABLE
1212
1213#ifndef _WIN32
1214 ev_signal_init (&childev, childcb, SIGCHLD); 3439 ev_signal_init (&childev, childcb, SIGCHLD);
1215 ev_set_priority (&childev, EV_MAXPRI); 3440 ev_set_priority (&childev, EV_MAXPRI);
1216 ev_signal_start (EV_A_ &childev); 3441 ev_signal_start (EV_A_ &childev);
1217 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3442 ev_unref (EV_A); /* child watcher should not keep loop alive */
1218#endif 3443#endif
… …
1223 3448
1224 return ev_default_loop_ptr; 3449 return ev_default_loop_ptr;
1225} 3450}
1226 3451
1227void 3452void
1228ev_default_destroy (void) 3453ev_loop_fork (EV_P) EV_NOEXCEPT
1229{ 3454{
1230#if EV_MULTIPLICITY
1231 struct ev_loop *loop = ev_default_loop_ptr;
1232#endif
1233
1234#ifndef _WIN32
1235 ev_ref (EV_A); /* child watcher */
1236 ev_signal_stop (EV_A_ &childev);
1237#endif
1238
1239 ev_ref (EV_A); /* signal watcher */
1240 ev_io_stop (EV_A_ &sigev);
1241
1242 close (sigpipe [0]); sigpipe [0] = 0;
1243 close (sigpipe [1]); sigpipe [1] = 0;
1244
1245 loop_destroy (EV_A);
1246}
1247
1248void
1249ev_default_fork (void)
1250{
1251#if EV_MULTIPLICITY
1252 struct ev_loop *loop = ev_default_loop_ptr;
1253#endif
1254
1255 if (backend)
1256 postfork = 1; 3455 postfork = 1;
1257} 3456}
1258 3457
1259/*****************************************************************************/ 3458/*****************************************************************************/
1260 3459
1261void 3460void
1262ev_invoke (EV_P_ void *w, int revents) 3461ev_invoke (EV_P_ void *w, int revents)
1263{ 3462{
1264 EV_CB_INVOKE ((W)w, revents); 3463 EV_CB_INVOKE ((W)w, revents);
1265} 3464}
1266 3465
1267void inline_speed 3466unsigned int
1268call_pending (EV_P) 3467ev_pending_count (EV_P) EV_NOEXCEPT
1269{ 3468{
1270 int pri; 3469 int pri;
3470 unsigned int count = 0;
1271 3471
1272 for (pri = NUMPRI; pri--; ) 3472 for (pri = NUMPRI; pri--; )
3473 count += pendingcnt [pri];
3474
3475 return count;
3476}
3477
3478ecb_noinline
3479void
3480ev_invoke_pending (EV_P)
3481{
3482 pendingpri = NUMPRI;
3483
3484 do
3485 {
3486 --pendingpri;
3487
3488 /* pendingpri possibly gets modified in the inner loop */
1273 while (pendingcnt [pri]) 3489 while (pendingcnt [pendingpri])
1274 {
1275 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1276
1277 if (expect_true (p->w))
1278 {
1279 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1280
1281 p->w->pending = 0;
1282 EV_CB_INVOKE (p->w, p->events);
1283 }
1284 }
1285}
1286
1287void inline_size
1288timers_reify (EV_P)
1289{
1290 while (timercnt && ((WT)timers [0])->at <= mn_now)
1291 {
1292 ev_timer *w = (ev_timer *)timers [0];
1293
1294 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1295
1296 /* first reschedule or stop timer */
1297 if (w->repeat)
1298 { 3490 {
1299 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3491 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1300 3492
1301 ((WT)w)->at += w->repeat; 3493 p->w->pending = 0;
1302 if (((WT)w)->at < mn_now) 3494 EV_CB_INVOKE (p->w, p->events);
1303 ((WT)w)->at = mn_now; 3495 EV_FREQUENT_CHECK;
1304
1305 downheap (timers, timercnt, 0);
1306 } 3496 }
1307 else
1308 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1309
1310 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1311 }
1312}
1313
1314#if EV_PERIODIC_ENABLE
1315void inline_size
1316periodics_reify (EV_P)
1317{
1318 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1319 { 3497 }
1320 ev_periodic *w = (ev_periodic *)periodics [0]; 3498 while (pendingpri);
1321
1322 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1323
1324 /* first reschedule or stop timer */
1325 if (w->reschedule_cb)
1326 {
1327 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1328 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1329 downheap (periodics, periodiccnt, 0);
1330 }
1331 else if (w->interval)
1332 {
1333 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1334 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1335 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1336 downheap (periodics, periodiccnt, 0);
1337 }
1338 else
1339 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1340
1341 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1342 }
1343} 3499}
1344
1345static void noinline
1346periodics_reschedule (EV_P)
1347{
1348 int i;
1349
1350 /* adjust periodics after time jump */
1351 for (i = 0; i < periodiccnt; ++i)
1352 {
1353 ev_periodic *w = (ev_periodic *)periodics [i];
1354
1355 if (w->reschedule_cb)
1356 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1357 else if (w->interval)
1358 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1359 }
1360
1361 /* now rebuild the heap */
1362 for (i = periodiccnt >> 1; i--; )
1363 downheap (periodics, periodiccnt, i);
1364}
1365#endif
1366 3500
1367#if EV_IDLE_ENABLE 3501#if EV_IDLE_ENABLE
1368void inline_size 3502/* make idle watchers pending. this handles the "call-idle */
3503/* only when higher priorities are idle" logic */
3504inline_size void
1369idle_reify (EV_P) 3505idle_reify (EV_P)
1370{ 3506{
1371 if (expect_false (idleall)) 3507 if (ecb_expect_false (idleall))
1372 { 3508 {
1373 int pri; 3509 int pri;
1374 3510
1375 for (pri = NUMPRI; pri--; ) 3511 for (pri = NUMPRI; pri--; )
1376 { 3512 {
… …
1385 } 3521 }
1386 } 3522 }
1387} 3523}
1388#endif 3524#endif
1389 3525
1390void inline_speed 3526/* make timers pending */
3527inline_size void
3528timers_reify (EV_P)
3529{
3530 EV_FREQUENT_CHECK;
3531
3532 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3533 {
3534 do
3535 {
3536 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3537
3538 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3539
3540 /* first reschedule or stop timer */
3541 if (w->repeat)
3542 {
3543 ev_at (w) += w->repeat;
3544 if (ev_at (w) < mn_now)
3545 ev_at (w) = mn_now;
3546
3547 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3548
3549 ANHE_at_cache (timers [HEAP0]);
3550 downheap (timers, timercnt, HEAP0);
3551 }
3552 else
3553 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3554
3555 EV_FREQUENT_CHECK;
3556 feed_reverse (EV_A_ (W)w);
3557 }
3558 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3559
3560 feed_reverse_done (EV_A_ EV_TIMER);
3561 }
3562}
3563
3564#if EV_PERIODIC_ENABLE
3565
3566ecb_noinline
3567static void
3568periodic_recalc (EV_P_ ev_periodic *w)
3569{
3570 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3571 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3572
3573 /* the above almost always errs on the low side */
3574 while (at <= ev_rt_now)
3575 {
3576 ev_tstamp nat = at + w->interval;
3577
3578 /* when resolution fails us, we use ev_rt_now */
3579 if (ecb_expect_false (nat == at))
3580 {
3581 at = ev_rt_now;
3582 break;
3583 }
3584
3585 at = nat;
3586 }
3587
3588 ev_at (w) = at;
3589}
3590
3591/* make periodics pending */
3592inline_size void
3593periodics_reify (EV_P)
3594{
3595 EV_FREQUENT_CHECK;
3596
3597 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3598 {
3599 do
3600 {
3601 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3602
3603 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3604
3605 /* first reschedule or stop timer */
3606 if (w->reschedule_cb)
3607 {
3608 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3609
3610 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3611
3612 ANHE_at_cache (periodics [HEAP0]);
3613 downheap (periodics, periodiccnt, HEAP0);
3614 }
3615 else if (w->interval)
3616 {
3617 periodic_recalc (EV_A_ w);
3618 ANHE_at_cache (periodics [HEAP0]);
3619 downheap (periodics, periodiccnt, HEAP0);
3620 }
3621 else
3622 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3623
3624 EV_FREQUENT_CHECK;
3625 feed_reverse (EV_A_ (W)w);
3626 }
3627 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3628
3629 feed_reverse_done (EV_A_ EV_PERIODIC);
3630 }
3631}
3632
3633/* simply recalculate all periodics */
3634/* TODO: maybe ensure that at least one event happens when jumping forward? */
3635ecb_noinline ecb_cold
3636static void
3637periodics_reschedule (EV_P)
3638{
3639 int i;
3640
3641 /* adjust periodics after time jump */
3642 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3643 {
3644 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3645
3646 if (w->reschedule_cb)
3647 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3648 else if (w->interval)
3649 periodic_recalc (EV_A_ w);
3650
3651 ANHE_at_cache (periodics [i]);
3652 }
3653
3654 reheap (periodics, periodiccnt);
3655}
3656#endif
3657
3658/* adjust all timers by a given offset */
3659ecb_noinline ecb_cold
3660static void
3661timers_reschedule (EV_P_ ev_tstamp adjust)
3662{
3663 int i;
3664
3665 for (i = 0; i < timercnt; ++i)
3666 {
3667 ANHE *he = timers + i + HEAP0;
3668 ANHE_w (*he)->at += adjust;
3669 ANHE_at_cache (*he);
3670 }
3671}
3672
3673/* fetch new monotonic and realtime times from the kernel */
3674/* also detect if there was a timejump, and act accordingly */
3675inline_speed void
1391time_update (EV_P_ ev_tstamp max_block) 3676time_update (EV_P_ ev_tstamp max_block)
1392{ 3677{
1393 int i;
1394
1395#if EV_USE_MONOTONIC 3678#if EV_USE_MONOTONIC
1396 if (expect_true (have_monotonic)) 3679 if (ecb_expect_true (have_monotonic))
1397 { 3680 {
3681 int i;
1398 ev_tstamp odiff = rtmn_diff; 3682 ev_tstamp odiff = rtmn_diff;
1399 3683
1400 mn_now = get_clock (); 3684 mn_now = get_clock ();
1401 3685
1402 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3686 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1403 /* interpolate in the meantime */ 3687 /* interpolate in the meantime */
1404 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3688 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1405 { 3689 {
1406 ev_rt_now = rtmn_diff + mn_now; 3690 ev_rt_now = rtmn_diff + mn_now;
1407 return; 3691 return;
1408 } 3692 }
1409 3693
… …
1418 * doesn't hurt either as we only do this on time-jumps or 3702 * doesn't hurt either as we only do this on time-jumps or
1419 * in the unlikely event of having been preempted here. 3703 * in the unlikely event of having been preempted here.
1420 */ 3704 */
1421 for (i = 4; --i; ) 3705 for (i = 4; --i; )
1422 { 3706 {
3707 ev_tstamp diff;
1423 rtmn_diff = ev_rt_now - mn_now; 3708 rtmn_diff = ev_rt_now - mn_now;
1424 3709
1425 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3710 diff = odiff - rtmn_diff;
3711
3712 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1426 return; /* all is well */ 3713 return; /* all is well */
1427 3714
1428 ev_rt_now = ev_time (); 3715 ev_rt_now = ev_time ();
1429 mn_now = get_clock (); 3716 mn_now = get_clock ();
1430 now_floor = mn_now; 3717 now_floor = mn_now;
1431 } 3718 }
1432 3719
3720 /* no timer adjustment, as the monotonic clock doesn't jump */
3721 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1433# if EV_PERIODIC_ENABLE 3722# if EV_PERIODIC_ENABLE
1434 periodics_reschedule (EV_A); 3723 periodics_reschedule (EV_A);
1435# endif 3724# endif
1436 /* no timer adjustment, as the monotonic clock doesn't jump */
1437 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1438 } 3725 }
1439 else 3726 else
1440#endif 3727#endif
1441 { 3728 {
1442 ev_rt_now = ev_time (); 3729 ev_rt_now = ev_time ();
1443 3730
1444 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3731 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1445 { 3732 {
3733 /* adjust timers. this is easy, as the offset is the same for all of them */
3734 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1446#if EV_PERIODIC_ENABLE 3735#if EV_PERIODIC_ENABLE
1447 periodics_reschedule (EV_A); 3736 periodics_reschedule (EV_A);
1448#endif 3737#endif
1449 /* adjust timers. this is easy, as the offset is the same for all of them */
1450 for (i = 0; i < timercnt; ++i)
1451 ((WT)timers [i])->at += ev_rt_now - mn_now;
1452 } 3738 }
1453 3739
1454 mn_now = ev_rt_now; 3740 mn_now = ev_rt_now;
1455 } 3741 }
1456} 3742}
1457 3743
1458void 3744int
1459ev_ref (EV_P)
1460{
1461 ++activecnt;
1462}
1463
1464void
1465ev_unref (EV_P)
1466{
1467 --activecnt;
1468}
1469
1470static int loop_done;
1471
1472void
1473ev_loop (EV_P_ int flags) 3745ev_run (EV_P_ int flags)
1474{ 3746{
1475 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 3747#if EV_FEATURE_API
1476 ? EVUNLOOP_ONE 3748 ++loop_depth;
1477 : EVUNLOOP_CANCEL; 3749#endif
1478 3750
3751 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3752
3753 loop_done = EVBREAK_CANCEL;
3754
1479 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3755 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1480 3756
1481 do 3757 do
1482 { 3758 {
3759#if EV_VERIFY >= 2
3760 ev_verify (EV_A);
3761#endif
3762
1483#ifndef _WIN32 3763#ifndef _WIN32
1484 if (expect_false (curpid)) /* penalise the forking check even more */ 3764 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
1485 if (expect_false (getpid () != curpid)) 3765 if (ecb_expect_false (getpid () != curpid))
1486 { 3766 {
1487 curpid = getpid (); 3767 curpid = getpid ();
1488 postfork = 1; 3768 postfork = 1;
1489 } 3769 }
1490#endif 3770#endif
1491 3771
1492#if EV_FORK_ENABLE 3772#if EV_FORK_ENABLE
1493 /* we might have forked, so queue fork handlers */ 3773 /* we might have forked, so queue fork handlers */
1494 if (expect_false (postfork)) 3774 if (ecb_expect_false (postfork))
1495 if (forkcnt) 3775 if (forkcnt)
1496 { 3776 {
1497 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3777 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1498 call_pending (EV_A); 3778 EV_INVOKE_PENDING;
1499 } 3779 }
1500#endif 3780#endif
1501 3781
3782#if EV_PREPARE_ENABLE
1502 /* queue prepare watchers (and execute them) */ 3783 /* queue prepare watchers (and execute them) */
1503 if (expect_false (preparecnt)) 3784 if (ecb_expect_false (preparecnt))
1504 { 3785 {
1505 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3786 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1506 call_pending (EV_A); 3787 EV_INVOKE_PENDING;
1507 } 3788 }
3789#endif
1508 3790
1509 if (expect_false (!activecnt)) 3791 if (ecb_expect_false (loop_done))
1510 break; 3792 break;
1511 3793
1512 /* we might have forked, so reify kernel state if necessary */ 3794 /* we might have forked, so reify kernel state if necessary */
1513 if (expect_false (postfork)) 3795 if (ecb_expect_false (postfork))
1514 loop_fork (EV_A); 3796 loop_fork (EV_A);
1515 3797
1516 /* update fd-related kernel structures */ 3798 /* update fd-related kernel structures */
1517 fd_reify (EV_A); 3799 fd_reify (EV_A);
1518 3800
1519 /* calculate blocking time */ 3801 /* calculate blocking time */
1520 { 3802 {
1521 ev_tstamp waittime = 0.; 3803 ev_tstamp waittime = 0.;
1522 ev_tstamp sleeptime = 0.; 3804 ev_tstamp sleeptime = 0.;
1523 3805
3806 /* remember old timestamp for io_blocktime calculation */
3807 ev_tstamp prev_mn_now = mn_now;
3808
3809 /* update time to cancel out callback processing overhead */
3810 time_update (EV_A_ 1e100);
3811
3812 /* from now on, we want a pipe-wake-up */
3813 pipe_write_wanted = 1;
3814
3815 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3816
1524 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3817 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1525 { 3818 {
1526 /* update time to cancel out callback processing overhead */
1527 time_update (EV_A_ 1e100);
1528
1529 waittime = MAX_BLOCKTIME; 3819 waittime = MAX_BLOCKTIME;
1530 3820
1531 if (timercnt) 3821 if (timercnt)
1532 { 3822 {
1533 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3823 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1534 if (waittime > to) waittime = to; 3824 if (waittime > to) waittime = to;
1535 } 3825 }
1536 3826
1537#if EV_PERIODIC_ENABLE 3827#if EV_PERIODIC_ENABLE
1538 if (periodiccnt) 3828 if (periodiccnt)
1539 { 3829 {
1540 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3830 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1541 if (waittime > to) waittime = to; 3831 if (waittime > to) waittime = to;
1542 } 3832 }
1543#endif 3833#endif
1544 3834
3835 /* don't let timeouts decrease the waittime below timeout_blocktime */
1545 if (expect_false (waittime < timeout_blocktime)) 3836 if (ecb_expect_false (waittime < timeout_blocktime))
1546 waittime = timeout_blocktime; 3837 waittime = timeout_blocktime;
1547 3838
1548 sleeptime = waittime - backend_fudge; 3839 /* at this point, we NEED to wait, so we have to ensure */
3840 /* to pass a minimum nonzero value to the backend */
3841 if (ecb_expect_false (waittime < backend_mintime))
3842 waittime = backend_mintime;
1549 3843
3844 /* extra check because io_blocktime is commonly 0 */
1550 if (expect_true (sleeptime > io_blocktime)) 3845 if (ecb_expect_false (io_blocktime))
1551 sleeptime = io_blocktime;
1552
1553 if (sleeptime)
1554 { 3846 {
3847 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3848
3849 if (sleeptime > waittime - backend_mintime)
3850 sleeptime = waittime - backend_mintime;
3851
3852 if (ecb_expect_true (sleeptime > 0.))
3853 {
1555 ev_sleep (sleeptime); 3854 ev_sleep (sleeptime);
1556 waittime -= sleeptime; 3855 waittime -= sleeptime;
3856 }
1557 } 3857 }
1558 } 3858 }
1559 3859
3860#if EV_FEATURE_API
1560 ++loop_count; 3861 ++loop_count;
3862#endif
3863 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1561 backend_poll (EV_A_ waittime); 3864 backend_poll (EV_A_ waittime);
3865 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3866
3867 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3868
3869 ECB_MEMORY_FENCE_ACQUIRE;
3870 if (pipe_write_skipped)
3871 {
3872 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3873 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3874 }
1562 3875
1563 /* update ev_rt_now, do magic */ 3876 /* update ev_rt_now, do magic */
1564 time_update (EV_A_ waittime + sleeptime); 3877 time_update (EV_A_ waittime + sleeptime);
1565 } 3878 }
1566 3879
… …
1573#if EV_IDLE_ENABLE 3886#if EV_IDLE_ENABLE
1574 /* queue idle watchers unless other events are pending */ 3887 /* queue idle watchers unless other events are pending */
1575 idle_reify (EV_A); 3888 idle_reify (EV_A);
1576#endif 3889#endif
1577 3890
3891#if EV_CHECK_ENABLE
1578 /* queue check watchers, to be executed first */ 3892 /* queue check watchers, to be executed first */
1579 if (expect_false (checkcnt)) 3893 if (ecb_expect_false (checkcnt))
1580 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3894 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3895#endif
1581 3896
1582 call_pending (EV_A); 3897 EV_INVOKE_PENDING;
1583
1584 } 3898 }
1585 while (expect_true (activecnt && !loop_done)); 3899 while (ecb_expect_true (
3900 activecnt
3901 && !loop_done
3902 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3903 ));
1586 3904
1587 if (loop_done == EVUNLOOP_ONE) 3905 if (loop_done == EVBREAK_ONE)
1588 loop_done = EVUNLOOP_CANCEL; 3906 loop_done = EVBREAK_CANCEL;
1589}
1590 3907
3908#if EV_FEATURE_API
3909 --loop_depth;
3910#endif
3911
3912 return activecnt;
3913}
3914
1591void 3915void
1592ev_unloop (EV_P_ int how) 3916ev_break (EV_P_ int how) EV_NOEXCEPT
1593{ 3917{
1594 loop_done = how; 3918 loop_done = how;
1595} 3919}
1596 3920
3921void
3922ev_ref (EV_P) EV_NOEXCEPT
3923{
3924 ++activecnt;
3925}
3926
3927void
3928ev_unref (EV_P) EV_NOEXCEPT
3929{
3930 --activecnt;
3931}
3932
3933void
3934ev_now_update (EV_P) EV_NOEXCEPT
3935{
3936 time_update (EV_A_ 1e100);
3937}
3938
3939void
3940ev_suspend (EV_P) EV_NOEXCEPT
3941{
3942 ev_now_update (EV_A);
3943}
3944
3945void
3946ev_resume (EV_P) EV_NOEXCEPT
3947{
3948 ev_tstamp mn_prev = mn_now;
3949
3950 ev_now_update (EV_A);
3951 timers_reschedule (EV_A_ mn_now - mn_prev);
3952#if EV_PERIODIC_ENABLE
3953 /* TODO: really do this? */
3954 periodics_reschedule (EV_A);
3955#endif
3956}
3957
1597/*****************************************************************************/ 3958/*****************************************************************************/
3959/* singly-linked list management, used when the expected list length is short */
1598 3960
1599void inline_size 3961inline_size void
1600wlist_add (WL *head, WL elem) 3962wlist_add (WL *head, WL elem)
1601{ 3963{
1602 elem->next = *head; 3964 elem->next = *head;
1603 *head = elem; 3965 *head = elem;
1604} 3966}
1605 3967
1606void inline_size 3968inline_size void
1607wlist_del (WL *head, WL elem) 3969wlist_del (WL *head, WL elem)
1608{ 3970{
1609 while (*head) 3971 while (*head)
1610 { 3972 {
1611 if (*head == elem) 3973 if (ecb_expect_true (*head == elem))
1612 { 3974 {
1613 *head = elem->next; 3975 *head = elem->next;
1614 return; 3976 break;
1615 } 3977 }
1616 3978
1617 head = &(*head)->next; 3979 head = &(*head)->next;
1618 } 3980 }
1619} 3981}
1620 3982
1621void inline_speed 3983/* internal, faster, version of ev_clear_pending */
3984inline_speed void
1622clear_pending (EV_P_ W w) 3985clear_pending (EV_P_ W w)
1623{ 3986{
1624 if (w->pending) 3987 if (w->pending)
1625 { 3988 {
1626 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3989 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1627 w->pending = 0; 3990 w->pending = 0;
1628 } 3991 }
1629} 3992}
1630 3993
1631int 3994int
1632ev_clear_pending (EV_P_ void *w) 3995ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
1633{ 3996{
1634 W w_ = (W)w; 3997 W w_ = (W)w;
1635 int pending = w_->pending; 3998 int pending = w_->pending;
1636 3999
1637 if (expect_true (pending)) 4000 if (ecb_expect_true (pending))
1638 { 4001 {
1639 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4002 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
4003 p->w = (W)&pending_w;
1640 w_->pending = 0; 4004 w_->pending = 0;
1641 p->w = 0;
1642 return p->events; 4005 return p->events;
1643 } 4006 }
1644 else 4007 else
1645 return 0; 4008 return 0;
1646} 4009}
1647 4010
1648void inline_size 4011inline_size void
1649pri_adjust (EV_P_ W w) 4012pri_adjust (EV_P_ W w)
1650{ 4013{
1651 int pri = w->priority; 4014 int pri = ev_priority (w);
1652 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 4015 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1653 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 4016 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1654 w->priority = pri; 4017 ev_set_priority (w, pri);
1655} 4018}
1656 4019
1657void inline_speed 4020inline_speed void
1658ev_start (EV_P_ W w, int active) 4021ev_start (EV_P_ W w, int active)
1659{ 4022{
1660 pri_adjust (EV_A_ w); 4023 pri_adjust (EV_A_ w);
1661 w->active = active; 4024 w->active = active;
1662 ev_ref (EV_A); 4025 ev_ref (EV_A);
1663} 4026}
1664 4027
1665void inline_size 4028inline_size void
1666ev_stop (EV_P_ W w) 4029ev_stop (EV_P_ W w)
1667{ 4030{
1668 ev_unref (EV_A); 4031 ev_unref (EV_A);
1669 w->active = 0; 4032 w->active = 0;
1670} 4033}
1671 4034
1672/*****************************************************************************/ 4035/*****************************************************************************/
1673 4036
1674void noinline 4037ecb_noinline
4038void
1675ev_io_start (EV_P_ ev_io *w) 4039ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
1676{ 4040{
1677 int fd = w->fd; 4041 int fd = w->fd;
1678 4042
1679 if (expect_false (ev_is_active (w))) 4043 if (ecb_expect_false (ev_is_active (w)))
1680 return; 4044 return;
1681 4045
1682 assert (("ev_io_start called with negative fd", fd >= 0)); 4046 assert (("libev: ev_io_start called with negative fd", fd >= 0));
4047 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
4048
4049#if EV_VERIFY >= 2
4050 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4051#endif
4052 EV_FREQUENT_CHECK;
1683 4053
1684 ev_start (EV_A_ (W)w, 1); 4054 ev_start (EV_A_ (W)w, 1);
1685 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 4055 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
1686 wlist_add (&anfds[fd].head, (WL)w); 4056 wlist_add (&anfds[fd].head, (WL)w);
1687 4057
4058 /* common bug, apparently */
4059 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
4060
1688 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 4061 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1689 w->events &= ~EV_IOFDSET; 4062 w->events &= ~EV__IOFDSET;
1690}
1691 4063
1692void noinline 4064 EV_FREQUENT_CHECK;
4065}
4066
4067ecb_noinline
4068void
1693ev_io_stop (EV_P_ ev_io *w) 4069ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
1694{ 4070{
1695 clear_pending (EV_A_ (W)w); 4071 clear_pending (EV_A_ (W)w);
1696 if (expect_false (!ev_is_active (w))) 4072 if (ecb_expect_false (!ev_is_active (w)))
1697 return; 4073 return;
1698 4074
1699 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4075 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
4076
4077#if EV_VERIFY >= 2
4078 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4079#endif
4080 EV_FREQUENT_CHECK;
1700 4081
1701 wlist_del (&anfds[w->fd].head, (WL)w); 4082 wlist_del (&anfds[w->fd].head, (WL)w);
1702 ev_stop (EV_A_ (W)w); 4083 ev_stop (EV_A_ (W)w);
1703 4084
1704 fd_change (EV_A_ w->fd, 1); 4085 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1705}
1706 4086
1707void noinline 4087 EV_FREQUENT_CHECK;
4088}
4089
4090ecb_noinline
4091void
1708ev_timer_start (EV_P_ ev_timer *w) 4092ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
1709{ 4093{
1710 if (expect_false (ev_is_active (w))) 4094 if (ecb_expect_false (ev_is_active (w)))
1711 return; 4095 return;
1712 4096
1713 ((WT)w)->at += mn_now; 4097 ev_at (w) += mn_now;
1714 4098
1715 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4099 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1716 4100
4101 EV_FREQUENT_CHECK;
4102
4103 ++timercnt;
1717 ev_start (EV_A_ (W)w, ++timercnt); 4104 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1718 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 4105 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
1719 timers [timercnt - 1] = (WT)w; 4106 ANHE_w (timers [ev_active (w)]) = (WT)w;
1720 upheap (timers, timercnt - 1); 4107 ANHE_at_cache (timers [ev_active (w)]);
4108 upheap (timers, ev_active (w));
1721 4109
4110 EV_FREQUENT_CHECK;
4111
1722 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 4112 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1723} 4113}
1724 4114
1725void noinline 4115ecb_noinline
4116void
1726ev_timer_stop (EV_P_ ev_timer *w) 4117ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
1727{ 4118{
1728 clear_pending (EV_A_ (W)w); 4119 clear_pending (EV_A_ (W)w);
1729 if (expect_false (!ev_is_active (w))) 4120 if (ecb_expect_false (!ev_is_active (w)))
1730 return; 4121 return;
1731 4122
1732 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 4123 EV_FREQUENT_CHECK;
1733 4124
1734 { 4125 {
1735 int active = ((W)w)->active; 4126 int active = ev_active (w);
1736 4127
4128 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
4129
4130 --timercnt;
4131
1737 if (expect_true (--active < --timercnt)) 4132 if (ecb_expect_true (active < timercnt + HEAP0))
1738 { 4133 {
1739 timers [active] = timers [timercnt]; 4134 timers [active] = timers [timercnt + HEAP0];
1740 adjustheap (timers, timercnt, active); 4135 adjustheap (timers, timercnt, active);
1741 } 4136 }
1742 } 4137 }
1743 4138
1744 ((WT)w)->at -= mn_now; 4139 ev_at (w) -= mn_now;
1745 4140
1746 ev_stop (EV_A_ (W)w); 4141 ev_stop (EV_A_ (W)w);
1747}
1748 4142
1749void noinline 4143 EV_FREQUENT_CHECK;
4144}
4145
4146ecb_noinline
4147void
1750ev_timer_again (EV_P_ ev_timer *w) 4148ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
1751{ 4149{
4150 EV_FREQUENT_CHECK;
4151
4152 clear_pending (EV_A_ (W)w);
4153
1752 if (ev_is_active (w)) 4154 if (ev_is_active (w))
1753 { 4155 {
1754 if (w->repeat) 4156 if (w->repeat)
1755 { 4157 {
1756 ((WT)w)->at = mn_now + w->repeat; 4158 ev_at (w) = mn_now + w->repeat;
4159 ANHE_at_cache (timers [ev_active (w)]);
1757 adjustheap (timers, timercnt, ((W)w)->active - 1); 4160 adjustheap (timers, timercnt, ev_active (w));
1758 } 4161 }
1759 else 4162 else
1760 ev_timer_stop (EV_A_ w); 4163 ev_timer_stop (EV_A_ w);
1761 } 4164 }
1762 else if (w->repeat) 4165 else if (w->repeat)
1763 { 4166 {
1764 w->at = w->repeat; 4167 ev_at (w) = w->repeat;
1765 ev_timer_start (EV_A_ w); 4168 ev_timer_start (EV_A_ w);
1766 } 4169 }
4170
4171 EV_FREQUENT_CHECK;
4172}
4173
4174ev_tstamp
4175ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4176{
4177 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1767} 4178}
1768 4179
1769#if EV_PERIODIC_ENABLE 4180#if EV_PERIODIC_ENABLE
1770void noinline 4181ecb_noinline
4182void
1771ev_periodic_start (EV_P_ ev_periodic *w) 4183ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
1772{ 4184{
1773 if (expect_false (ev_is_active (w))) 4185 if (ecb_expect_false (ev_is_active (w)))
1774 return; 4186 return;
1775 4187
1776 if (w->reschedule_cb) 4188 if (w->reschedule_cb)
1777 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 4189 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1778 else if (w->interval) 4190 else if (w->interval)
1779 { 4191 {
1780 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4192 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1781 /* this formula differs from the one in periodic_reify because we do not always round up */ 4193 periodic_recalc (EV_A_ w);
1782 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1783 } 4194 }
1784 else 4195 else
1785 ((WT)w)->at = w->offset; 4196 ev_at (w) = w->offset;
1786 4197
4198 EV_FREQUENT_CHECK;
4199
4200 ++periodiccnt;
1787 ev_start (EV_A_ (W)w, ++periodiccnt); 4201 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1788 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 4202 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
1789 periodics [periodiccnt - 1] = (WT)w; 4203 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1790 upheap (periodics, periodiccnt - 1); 4204 ANHE_at_cache (periodics [ev_active (w)]);
4205 upheap (periodics, ev_active (w));
1791 4206
4207 EV_FREQUENT_CHECK;
4208
1792 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 4209 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1793} 4210}
1794 4211
1795void noinline 4212ecb_noinline
4213void
1796ev_periodic_stop (EV_P_ ev_periodic *w) 4214ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
1797{ 4215{
1798 clear_pending (EV_A_ (W)w); 4216 clear_pending (EV_A_ (W)w);
1799 if (expect_false (!ev_is_active (w))) 4217 if (ecb_expect_false (!ev_is_active (w)))
1800 return; 4218 return;
1801 4219
1802 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 4220 EV_FREQUENT_CHECK;
1803 4221
1804 { 4222 {
1805 int active = ((W)w)->active; 4223 int active = ev_active (w);
1806 4224
4225 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4226
4227 --periodiccnt;
4228
1807 if (expect_true (--active < --periodiccnt)) 4229 if (ecb_expect_true (active < periodiccnt + HEAP0))
1808 { 4230 {
1809 periodics [active] = periodics [periodiccnt]; 4231 periodics [active] = periodics [periodiccnt + HEAP0];
1810 adjustheap (periodics, periodiccnt, active); 4232 adjustheap (periodics, periodiccnt, active);
1811 } 4233 }
1812 } 4234 }
1813 4235
1814 ev_stop (EV_A_ (W)w); 4236 ev_stop (EV_A_ (W)w);
1815}
1816 4237
1817void noinline 4238 EV_FREQUENT_CHECK;
4239}
4240
4241ecb_noinline
4242void
1818ev_periodic_again (EV_P_ ev_periodic *w) 4243ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
1819{ 4244{
1820 /* TODO: use adjustheap and recalculation */ 4245 /* TODO: use adjustheap and recalculation */
1821 ev_periodic_stop (EV_A_ w); 4246 ev_periodic_stop (EV_A_ w);
1822 ev_periodic_start (EV_A_ w); 4247 ev_periodic_start (EV_A_ w);
1823} 4248}
… …
1825 4250
1826#ifndef SA_RESTART 4251#ifndef SA_RESTART
1827# define SA_RESTART 0 4252# define SA_RESTART 0
1828#endif 4253#endif
1829 4254
1830void noinline 4255#if EV_SIGNAL_ENABLE
4256
4257ecb_noinline
4258void
1831ev_signal_start (EV_P_ ev_signal *w) 4259ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
1832{ 4260{
4261 if (ecb_expect_false (ev_is_active (w)))
4262 return;
4263
4264 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4265
1833#if EV_MULTIPLICITY 4266#if EV_MULTIPLICITY
1834 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4267 assert (("libev: a signal must not be attached to two different loops",
1835#endif 4268 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
1836 if (expect_false (ev_is_active (w)))
1837 return;
1838 4269
1839 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4270 signals [w->signum - 1].loop = EV_A;
4271 ECB_MEMORY_FENCE_RELEASE;
4272#endif
1840 4273
4274 EV_FREQUENT_CHECK;
4275
4276#if EV_USE_SIGNALFD
4277 if (sigfd == -2)
1841 { 4278 {
1842#ifndef _WIN32 4279 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1843 sigset_t full, prev; 4280 if (sigfd < 0 && errno == EINVAL)
1844 sigfillset (&full); 4281 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1845 sigprocmask (SIG_SETMASK, &full, &prev);
1846#endif
1847 4282
1848 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4283 if (sigfd >= 0)
4284 {
4285 fd_intern (sigfd); /* doing it twice will not hurt */
1849 4286
1850#ifndef _WIN32 4287 sigemptyset (&sigfd_set);
1851 sigprocmask (SIG_SETMASK, &prev, 0); 4288
1852#endif 4289 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4290 ev_set_priority (&sigfd_w, EV_MAXPRI);
4291 ev_io_start (EV_A_ &sigfd_w);
4292 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4293 }
1853 } 4294 }
4295
4296 if (sigfd >= 0)
4297 {
4298 /* TODO: check .head */
4299 sigaddset (&sigfd_set, w->signum);
4300 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4301
4302 signalfd (sigfd, &sigfd_set, 0);
4303 }
4304#endif
1854 4305
1855 ev_start (EV_A_ (W)w, 1); 4306 ev_start (EV_A_ (W)w, 1);
1856 wlist_add (&signals [w->signum - 1].head, (WL)w); 4307 wlist_add (&signals [w->signum - 1].head, (WL)w);
1857 4308
1858 if (!((WL)w)->next) 4309 if (!((WL)w)->next)
4310# if EV_USE_SIGNALFD
4311 if (sigfd < 0) /*TODO*/
4312# endif
1859 { 4313 {
1860#if _WIN32 4314# ifdef _WIN32
4315 evpipe_init (EV_A);
4316
1861 signal (w->signum, sighandler); 4317 signal (w->signum, ev_sighandler);
1862#else 4318# else
1863 struct sigaction sa; 4319 struct sigaction sa;
4320
4321 evpipe_init (EV_A);
4322
1864 sa.sa_handler = sighandler; 4323 sa.sa_handler = ev_sighandler;
1865 sigfillset (&sa.sa_mask); 4324 sigfillset (&sa.sa_mask);
1866 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4325 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1867 sigaction (w->signum, &sa, 0); 4326 sigaction (w->signum, &sa, 0);
4327
4328 if (origflags & EVFLAG_NOSIGMASK)
4329 {
4330 sigemptyset (&sa.sa_mask);
4331 sigaddset (&sa.sa_mask, w->signum);
4332 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4333 }
1868#endif 4334#endif
1869 } 4335 }
1870}
1871 4336
1872void noinline 4337 EV_FREQUENT_CHECK;
4338}
4339
4340ecb_noinline
4341void
1873ev_signal_stop (EV_P_ ev_signal *w) 4342ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
1874{ 4343{
1875 clear_pending (EV_A_ (W)w); 4344 clear_pending (EV_A_ (W)w);
1876 if (expect_false (!ev_is_active (w))) 4345 if (ecb_expect_false (!ev_is_active (w)))
1877 return; 4346 return;
4347
4348 EV_FREQUENT_CHECK;
1878 4349
1879 wlist_del (&signals [w->signum - 1].head, (WL)w); 4350 wlist_del (&signals [w->signum - 1].head, (WL)w);
1880 ev_stop (EV_A_ (W)w); 4351 ev_stop (EV_A_ (W)w);
1881 4352
1882 if (!signals [w->signum - 1].head) 4353 if (!signals [w->signum - 1].head)
1883 signal (w->signum, SIG_DFL); 4354 {
1884}
1885
1886void
1887ev_child_start (EV_P_ ev_child *w)
1888{
1889#if EV_MULTIPLICITY 4355#if EV_MULTIPLICITY
4356 signals [w->signum - 1].loop = 0; /* unattach from signal */
4357#endif
4358#if EV_USE_SIGNALFD
4359 if (sigfd >= 0)
4360 {
4361 sigset_t ss;
4362
4363 sigemptyset (&ss);
4364 sigaddset (&ss, w->signum);
4365 sigdelset (&sigfd_set, w->signum);
4366
4367 signalfd (sigfd, &sigfd_set, 0);
4368 sigprocmask (SIG_UNBLOCK, &ss, 0);
4369 }
4370 else
4371#endif
4372 signal (w->signum, SIG_DFL);
4373 }
4374
4375 EV_FREQUENT_CHECK;
4376}
4377
4378#endif
4379
4380#if EV_CHILD_ENABLE
4381
4382void
4383ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4384{
4385#if EV_MULTIPLICITY
1890 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4386 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1891#endif 4387#endif
1892 if (expect_false (ev_is_active (w))) 4388 if (ecb_expect_false (ev_is_active (w)))
1893 return; 4389 return;
1894 4390
4391 EV_FREQUENT_CHECK;
4392
1895 ev_start (EV_A_ (W)w, 1); 4393 ev_start (EV_A_ (W)w, 1);
1896 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4394 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1897}
1898 4395
4396 EV_FREQUENT_CHECK;
4397}
4398
1899void 4399void
1900ev_child_stop (EV_P_ ev_child *w) 4400ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
1901{ 4401{
1902 clear_pending (EV_A_ (W)w); 4402 clear_pending (EV_A_ (W)w);
1903 if (expect_false (!ev_is_active (w))) 4403 if (ecb_expect_false (!ev_is_active (w)))
1904 return; 4404 return;
1905 4405
4406 EV_FREQUENT_CHECK;
4407
1906 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4408 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1907 ev_stop (EV_A_ (W)w); 4409 ev_stop (EV_A_ (W)w);
4410
4411 EV_FREQUENT_CHECK;
1908} 4412}
4413
4414#endif
1909 4415
1910#if EV_STAT_ENABLE 4416#if EV_STAT_ENABLE
1911 4417
1912# ifdef _WIN32 4418# ifdef _WIN32
1913# undef lstat 4419# undef lstat
1914# define lstat(a,b) _stati64 (a,b) 4420# define lstat(a,b) _stati64 (a,b)
1915# endif 4421# endif
1916 4422
1917#define DEF_STAT_INTERVAL 5.0074891 4423#define DEF_STAT_INTERVAL 5.0074891
4424#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1918#define MIN_STAT_INTERVAL 0.1074891 4425#define MIN_STAT_INTERVAL 0.1074891
1919 4426
1920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4427ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1921 4428
1922#if EV_USE_INOTIFY 4429#if EV_USE_INOTIFY
1923# define EV_INOTIFY_BUFSIZE 8192
1924 4430
1925static void noinline 4431/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4432# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4433
4434ecb_noinline
4435static void
1926infy_add (EV_P_ ev_stat *w) 4436infy_add (EV_P_ ev_stat *w)
1927{ 4437{
1928 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4438 w->wd = inotify_add_watch (fs_fd, w->path,
4439 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4440 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4441 | IN_DONT_FOLLOW | IN_MASK_ADD);
1929 4442
1930 if (w->wd < 0) 4443 if (w->wd >= 0)
4444 {
4445 struct statfs sfs;
4446
4447 /* now local changes will be tracked by inotify, but remote changes won't */
4448 /* unless the filesystem is known to be local, we therefore still poll */
4449 /* also do poll on <2.6.25, but with normal frequency */
4450
4451 if (!fs_2625)
4452 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4453 else if (!statfs (w->path, &sfs)
4454 && (sfs.f_type == 0x1373 /* devfs */
4455 || sfs.f_type == 0x4006 /* fat */
4456 || sfs.f_type == 0x4d44 /* msdos */
4457 || sfs.f_type == 0xEF53 /* ext2/3 */
4458 || sfs.f_type == 0x72b6 /* jffs2 */
4459 || sfs.f_type == 0x858458f6 /* ramfs */
4460 || sfs.f_type == 0x5346544e /* ntfs */
4461 || sfs.f_type == 0x3153464a /* jfs */
4462 || sfs.f_type == 0x9123683e /* btrfs */
4463 || sfs.f_type == 0x52654973 /* reiser3 */
4464 || sfs.f_type == 0x01021994 /* tmpfs */
4465 || sfs.f_type == 0x58465342 /* xfs */))
4466 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4467 else
4468 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1931 { 4469 }
1932 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4470 else
4471 {
4472 /* can't use inotify, continue to stat */
4473 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1933 4474
1934 /* monitor some parent directory for speedup hints */ 4475 /* if path is not there, monitor some parent directory for speedup hints */
4476 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4477 /* but an efficiency issue only */
1935 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4478 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1936 { 4479 {
1937 char path [4096]; 4480 char path [4096];
1938 strcpy (path, w->path); 4481 strcpy (path, w->path);
1939 4482
… …
1942 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4485 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1943 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4486 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1944 4487
1945 char *pend = strrchr (path, '/'); 4488 char *pend = strrchr (path, '/');
1946 4489
1947 if (!pend) 4490 if (!pend || pend == path)
1948 break; /* whoops, no '/', complain to your admin */ 4491 break;
1949 4492
1950 *pend = 0; 4493 *pend = 0;
1951 w->wd = inotify_add_watch (fs_fd, path, mask); 4494 w->wd = inotify_add_watch (fs_fd, path, mask);
1952 } 4495 }
1953 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4496 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1954 } 4497 }
1955 } 4498 }
1956 else
1957 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1958 4499
1959 if (w->wd >= 0) 4500 if (w->wd >= 0)
1960 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4501 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1961}
1962 4502
1963static void noinline 4503 /* now re-arm timer, if required */
4504 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4505 ev_timer_again (EV_A_ &w->timer);
4506 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4507}
4508
4509ecb_noinline
4510static void
1964infy_del (EV_P_ ev_stat *w) 4511infy_del (EV_P_ ev_stat *w)
1965{ 4512{
1966 int slot; 4513 int slot;
1967 int wd = w->wd; 4514 int wd = w->wd;
1968 4515
1969 if (wd < 0) 4516 if (wd < 0)
1970 return; 4517 return;
1971 4518
1972 w->wd = -2; 4519 w->wd = -2;
1973 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4520 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1974 wlist_del (&fs_hash [slot].head, (WL)w); 4521 wlist_del (&fs_hash [slot].head, (WL)w);
1975 4522
1976 /* remove this watcher, if others are watching it, they will rearm */ 4523 /* remove this watcher, if others are watching it, they will rearm */
1977 inotify_rm_watch (fs_fd, wd); 4524 inotify_rm_watch (fs_fd, wd);
1978} 4525}
1979 4526
1980static void noinline 4527ecb_noinline
4528static void
1981infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4529infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1982{ 4530{
1983 if (slot < 0) 4531 if (slot < 0)
1984 /* overflow, need to check for all hahs slots */ 4532 /* overflow, need to check for all hash slots */
1985 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4533 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1986 infy_wd (EV_A_ slot, wd, ev); 4534 infy_wd (EV_A_ slot, wd, ev);
1987 else 4535 else
1988 { 4536 {
1989 WL w_; 4537 WL w_;
1990 4538
1991 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4539 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1992 { 4540 {
1993 ev_stat *w = (ev_stat *)w_; 4541 ev_stat *w = (ev_stat *)w_;
1994 w_ = w_->next; /* lets us remove this watcher and all before it */ 4542 w_ = w_->next; /* lets us remove this watcher and all before it */
1995 4543
1996 if (w->wd == wd || wd == -1) 4544 if (w->wd == wd || wd == -1)
1997 { 4545 {
1998 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4546 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1999 { 4547 {
4548 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2000 w->wd = -1; 4549 w->wd = -1;
2001 infy_add (EV_A_ w); /* re-add, no matter what */ 4550 infy_add (EV_A_ w); /* re-add, no matter what */
2002 } 4551 }
2003 4552
2004 stat_timer_cb (EV_A_ &w->timer, 0); 4553 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2009 4558
2010static void 4559static void
2011infy_cb (EV_P_ ev_io *w, int revents) 4560infy_cb (EV_P_ ev_io *w, int revents)
2012{ 4561{
2013 char buf [EV_INOTIFY_BUFSIZE]; 4562 char buf [EV_INOTIFY_BUFSIZE];
2014 struct inotify_event *ev = (struct inotify_event *)buf;
2015 int ofs; 4563 int ofs;
2016 int len = read (fs_fd, buf, sizeof (buf)); 4564 int len = read (fs_fd, buf, sizeof (buf));
2017 4565
2018 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4566 for (ofs = 0; ofs < len; )
4567 {
4568 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2019 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4569 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4570 ofs += sizeof (struct inotify_event) + ev->len;
4571 }
2020} 4572}
2021 4573
2022void inline_size 4574inline_size ecb_cold
4575void
4576ev_check_2625 (EV_P)
4577{
4578 /* kernels < 2.6.25 are borked
4579 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4580 */
4581 if (ev_linux_version () < 0x020619)
4582 return;
4583
4584 fs_2625 = 1;
4585}
4586
4587inline_size int
4588infy_newfd (void)
4589{
4590#if defined IN_CLOEXEC && defined IN_NONBLOCK
4591 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4592 if (fd >= 0)
4593 return fd;
4594#endif
4595 return inotify_init ();
4596}
4597
4598inline_size void
2023infy_init (EV_P) 4599infy_init (EV_P)
2024{ 4600{
2025 if (fs_fd != -2) 4601 if (fs_fd != -2)
2026 return; 4602 return;
2027 4603
4604 fs_fd = -1;
4605
4606 ev_check_2625 (EV_A);
4607
2028 fs_fd = inotify_init (); 4608 fs_fd = infy_newfd ();
2029 4609
2030 if (fs_fd >= 0) 4610 if (fs_fd >= 0)
2031 { 4611 {
4612 fd_intern (fs_fd);
2032 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4613 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2033 ev_set_priority (&fs_w, EV_MAXPRI); 4614 ev_set_priority (&fs_w, EV_MAXPRI);
2034 ev_io_start (EV_A_ &fs_w); 4615 ev_io_start (EV_A_ &fs_w);
4616 ev_unref (EV_A);
2035 } 4617 }
2036} 4618}
2037 4619
2038void inline_size 4620inline_size void
2039infy_fork (EV_P) 4621infy_fork (EV_P)
2040{ 4622{
2041 int slot; 4623 int slot;
2042 4624
2043 if (fs_fd < 0) 4625 if (fs_fd < 0)
2044 return; 4626 return;
2045 4627
4628 ev_ref (EV_A);
4629 ev_io_stop (EV_A_ &fs_w);
2046 close (fs_fd); 4630 close (fs_fd);
2047 fs_fd = inotify_init (); 4631 fs_fd = infy_newfd ();
2048 4632
4633 if (fs_fd >= 0)
4634 {
4635 fd_intern (fs_fd);
4636 ev_io_set (&fs_w, fs_fd, EV_READ);
4637 ev_io_start (EV_A_ &fs_w);
4638 ev_unref (EV_A);
4639 }
4640
2049 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4641 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2050 { 4642 {
2051 WL w_ = fs_hash [slot].head; 4643 WL w_ = fs_hash [slot].head;
2052 fs_hash [slot].head = 0; 4644 fs_hash [slot].head = 0;
2053 4645
2054 while (w_) 4646 while (w_)
… …
2059 w->wd = -1; 4651 w->wd = -1;
2060 4652
2061 if (fs_fd >= 0) 4653 if (fs_fd >= 0)
2062 infy_add (EV_A_ w); /* re-add, no matter what */ 4654 infy_add (EV_A_ w); /* re-add, no matter what */
2063 else 4655 else
4656 {
4657 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4658 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2064 ev_timer_start (EV_A_ &w->timer); 4659 ev_timer_again (EV_A_ &w->timer);
4660 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4661 }
2065 } 4662 }
2066
2067 } 4663 }
2068} 4664}
2069 4665
2070#endif 4666#endif
2071 4667
4668#ifdef _WIN32
4669# define EV_LSTAT(p,b) _stati64 (p, b)
4670#else
4671# define EV_LSTAT(p,b) lstat (p, b)
4672#endif
4673
2072void 4674void
2073ev_stat_stat (EV_P_ ev_stat *w) 4675ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2074{ 4676{
2075 if (lstat (w->path, &w->attr) < 0) 4677 if (lstat (w->path, &w->attr) < 0)
2076 w->attr.st_nlink = 0; 4678 w->attr.st_nlink = 0;
2077 else if (!w->attr.st_nlink) 4679 else if (!w->attr.st_nlink)
2078 w->attr.st_nlink = 1; 4680 w->attr.st_nlink = 1;
2079} 4681}
2080 4682
2081static void noinline 4683ecb_noinline
4684static void
2082stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4685stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2083{ 4686{
2084 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4687 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2085 4688
2086 /* we copy this here each the time so that */ 4689 ev_statdata prev = w->attr;
2087 /* prev has the old value when the callback gets invoked */
2088 w->prev = w->attr;
2089 ev_stat_stat (EV_A_ w); 4690 ev_stat_stat (EV_A_ w);
2090 4691
2091 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4692 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2092 if ( 4693 if (
2093 w->prev.st_dev != w->attr.st_dev 4694 prev.st_dev != w->attr.st_dev
2094 || w->prev.st_ino != w->attr.st_ino 4695 || prev.st_ino != w->attr.st_ino
2095 || w->prev.st_mode != w->attr.st_mode 4696 || prev.st_mode != w->attr.st_mode
2096 || w->prev.st_nlink != w->attr.st_nlink 4697 || prev.st_nlink != w->attr.st_nlink
2097 || w->prev.st_uid != w->attr.st_uid 4698 || prev.st_uid != w->attr.st_uid
2098 || w->prev.st_gid != w->attr.st_gid 4699 || prev.st_gid != w->attr.st_gid
2099 || w->prev.st_rdev != w->attr.st_rdev 4700 || prev.st_rdev != w->attr.st_rdev
2100 || w->prev.st_size != w->attr.st_size 4701 || prev.st_size != w->attr.st_size
2101 || w->prev.st_atime != w->attr.st_atime 4702 || prev.st_atime != w->attr.st_atime
2102 || w->prev.st_mtime != w->attr.st_mtime 4703 || prev.st_mtime != w->attr.st_mtime
2103 || w->prev.st_ctime != w->attr.st_ctime 4704 || prev.st_ctime != w->attr.st_ctime
2104 ) { 4705 ) {
4706 /* we only update w->prev on actual differences */
4707 /* in case we test more often than invoke the callback, */
4708 /* to ensure that prev is always different to attr */
4709 w->prev = prev;
4710
2105 #if EV_USE_INOTIFY 4711 #if EV_USE_INOTIFY
4712 if (fs_fd >= 0)
4713 {
2106 infy_del (EV_A_ w); 4714 infy_del (EV_A_ w);
2107 infy_add (EV_A_ w); 4715 infy_add (EV_A_ w);
2108 ev_stat_stat (EV_A_ w); /* avoid race... */ 4716 ev_stat_stat (EV_A_ w); /* avoid race... */
4717 }
2109 #endif 4718 #endif
2110 4719
2111 ev_feed_event (EV_A_ w, EV_STAT); 4720 ev_feed_event (EV_A_ w, EV_STAT);
2112 } 4721 }
2113} 4722}
2114 4723
2115void 4724void
2116ev_stat_start (EV_P_ ev_stat *w) 4725ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2117{ 4726{
2118 if (expect_false (ev_is_active (w))) 4727 if (ecb_expect_false (ev_is_active (w)))
2119 return; 4728 return;
2120 4729
2121 /* since we use memcmp, we need to clear any padding data etc. */
2122 memset (&w->prev, 0, sizeof (ev_statdata));
2123 memset (&w->attr, 0, sizeof (ev_statdata));
2124
2125 ev_stat_stat (EV_A_ w); 4730 ev_stat_stat (EV_A_ w);
2126 4731
4732 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2127 if (w->interval < MIN_STAT_INTERVAL) 4733 w->interval = MIN_STAT_INTERVAL;
2128 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2129 4734
2130 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4735 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2131 ev_set_priority (&w->timer, ev_priority (w)); 4736 ev_set_priority (&w->timer, ev_priority (w));
2132 4737
2133#if EV_USE_INOTIFY 4738#if EV_USE_INOTIFY
2134 infy_init (EV_A); 4739 infy_init (EV_A);
2135 4740
2136 if (fs_fd >= 0) 4741 if (fs_fd >= 0)
2137 infy_add (EV_A_ w); 4742 infy_add (EV_A_ w);
2138 else 4743 else
2139#endif 4744#endif
4745 {
2140 ev_timer_start (EV_A_ &w->timer); 4746 ev_timer_again (EV_A_ &w->timer);
4747 ev_unref (EV_A);
4748 }
2141 4749
2142 ev_start (EV_A_ (W)w, 1); 4750 ev_start (EV_A_ (W)w, 1);
2143}
2144 4751
4752 EV_FREQUENT_CHECK;
4753}
4754
2145void 4755void
2146ev_stat_stop (EV_P_ ev_stat *w) 4756ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2147{ 4757{
2148 clear_pending (EV_A_ (W)w); 4758 clear_pending (EV_A_ (W)w);
2149 if (expect_false (!ev_is_active (w))) 4759 if (ecb_expect_false (!ev_is_active (w)))
2150 return; 4760 return;
4761
4762 EV_FREQUENT_CHECK;
2151 4763
2152#if EV_USE_INOTIFY 4764#if EV_USE_INOTIFY
2153 infy_del (EV_A_ w); 4765 infy_del (EV_A_ w);
2154#endif 4766#endif
4767
4768 if (ev_is_active (&w->timer))
4769 {
4770 ev_ref (EV_A);
2155 ev_timer_stop (EV_A_ &w->timer); 4771 ev_timer_stop (EV_A_ &w->timer);
4772 }
2156 4773
2157 ev_stop (EV_A_ (W)w); 4774 ev_stop (EV_A_ (W)w);
4775
4776 EV_FREQUENT_CHECK;
2158} 4777}
2159#endif 4778#endif
2160 4779
2161#if EV_IDLE_ENABLE 4780#if EV_IDLE_ENABLE
2162void 4781void
2163ev_idle_start (EV_P_ ev_idle *w) 4782ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2164{ 4783{
2165 if (expect_false (ev_is_active (w))) 4784 if (ecb_expect_false (ev_is_active (w)))
2166 return; 4785 return;
2167 4786
2168 pri_adjust (EV_A_ (W)w); 4787 pri_adjust (EV_A_ (W)w);
4788
4789 EV_FREQUENT_CHECK;
2169 4790
2170 { 4791 {
2171 int active = ++idlecnt [ABSPRI (w)]; 4792 int active = ++idlecnt [ABSPRI (w)];
2172 4793
2173 ++idleall; 4794 ++idleall;
2174 ev_start (EV_A_ (W)w, active); 4795 ev_start (EV_A_ (W)w, active);
2175 4796
2176 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4797 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2177 idles [ABSPRI (w)][active - 1] = w; 4798 idles [ABSPRI (w)][active - 1] = w;
2178 } 4799 }
2179}
2180 4800
4801 EV_FREQUENT_CHECK;
4802}
4803
2181void 4804void
2182ev_idle_stop (EV_P_ ev_idle *w) 4805ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2183{ 4806{
2184 clear_pending (EV_A_ (W)w); 4807 clear_pending (EV_A_ (W)w);
2185 if (expect_false (!ev_is_active (w))) 4808 if (ecb_expect_false (!ev_is_active (w)))
2186 return; 4809 return;
2187 4810
4811 EV_FREQUENT_CHECK;
4812
2188 { 4813 {
2189 int active = ((W)w)->active; 4814 int active = ev_active (w);
2190 4815
2191 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4816 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2192 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4817 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2193 4818
2194 ev_stop (EV_A_ (W)w); 4819 ev_stop (EV_A_ (W)w);
2195 --idleall; 4820 --idleall;
2196 } 4821 }
2197}
2198#endif
2199 4822
4823 EV_FREQUENT_CHECK;
4824}
4825#endif
4826
4827#if EV_PREPARE_ENABLE
2200void 4828void
2201ev_prepare_start (EV_P_ ev_prepare *w) 4829ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2202{ 4830{
2203 if (expect_false (ev_is_active (w))) 4831 if (ecb_expect_false (ev_is_active (w)))
2204 return; 4832 return;
2205 4833
4834 EV_FREQUENT_CHECK;
4835
2206 ev_start (EV_A_ (W)w, ++preparecnt); 4836 ev_start (EV_A_ (W)w, ++preparecnt);
2207 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4837 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2208 prepares [preparecnt - 1] = w; 4838 prepares [preparecnt - 1] = w;
2209}
2210 4839
4840 EV_FREQUENT_CHECK;
4841}
4842
2211void 4843void
2212ev_prepare_stop (EV_P_ ev_prepare *w) 4844ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2213{ 4845{
2214 clear_pending (EV_A_ (W)w); 4846 clear_pending (EV_A_ (W)w);
2215 if (expect_false (!ev_is_active (w))) 4847 if (ecb_expect_false (!ev_is_active (w)))
2216 return; 4848 return;
2217 4849
4850 EV_FREQUENT_CHECK;
4851
2218 { 4852 {
2219 int active = ((W)w)->active; 4853 int active = ev_active (w);
4854
2220 prepares [active - 1] = prepares [--preparecnt]; 4855 prepares [active - 1] = prepares [--preparecnt];
2221 ((W)prepares [active - 1])->active = active; 4856 ev_active (prepares [active - 1]) = active;
2222 } 4857 }
2223 4858
2224 ev_stop (EV_A_ (W)w); 4859 ev_stop (EV_A_ (W)w);
2225}
2226 4860
4861 EV_FREQUENT_CHECK;
4862}
4863#endif
4864
4865#if EV_CHECK_ENABLE
2227void 4866void
2228ev_check_start (EV_P_ ev_check *w) 4867ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2229{ 4868{
2230 if (expect_false (ev_is_active (w))) 4869 if (ecb_expect_false (ev_is_active (w)))
2231 return; 4870 return;
2232 4871
4872 EV_FREQUENT_CHECK;
4873
2233 ev_start (EV_A_ (W)w, ++checkcnt); 4874 ev_start (EV_A_ (W)w, ++checkcnt);
2234 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4875 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2235 checks [checkcnt - 1] = w; 4876 checks [checkcnt - 1] = w;
2236}
2237 4877
4878 EV_FREQUENT_CHECK;
4879}
4880
2238void 4881void
2239ev_check_stop (EV_P_ ev_check *w) 4882ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2240{ 4883{
2241 clear_pending (EV_A_ (W)w); 4884 clear_pending (EV_A_ (W)w);
2242 if (expect_false (!ev_is_active (w))) 4885 if (ecb_expect_false (!ev_is_active (w)))
2243 return; 4886 return;
2244 4887
4888 EV_FREQUENT_CHECK;
4889
2245 { 4890 {
2246 int active = ((W)w)->active; 4891 int active = ev_active (w);
4892
2247 checks [active - 1] = checks [--checkcnt]; 4893 checks [active - 1] = checks [--checkcnt];
2248 ((W)checks [active - 1])->active = active; 4894 ev_active (checks [active - 1]) = active;
2249 } 4895 }
2250 4896
2251 ev_stop (EV_A_ (W)w); 4897 ev_stop (EV_A_ (W)w);
4898
4899 EV_FREQUENT_CHECK;
2252} 4900}
4901#endif
2253 4902
2254#if EV_EMBED_ENABLE 4903#if EV_EMBED_ENABLE
2255void noinline 4904ecb_noinline
4905void
2256ev_embed_sweep (EV_P_ ev_embed *w) 4906ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2257{ 4907{
2258 ev_loop (w->other, EVLOOP_NONBLOCK); 4908 ev_run (w->other, EVRUN_NOWAIT);
2259} 4909}
2260 4910
2261static void 4911static void
2262embed_io_cb (EV_P_ ev_io *io, int revents) 4912embed_io_cb (EV_P_ ev_io *io, int revents)
2263{ 4913{
2264 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4914 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2265 4915
2266 if (ev_cb (w)) 4916 if (ev_cb (w))
2267 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4917 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2268 else 4918 else
2269 ev_embed_sweep (loop, w); 4919 ev_run (w->other, EVRUN_NOWAIT);
2270} 4920}
2271 4921
2272static void 4922static void
2273embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4923embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2274{ 4924{
2275 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4925 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2276 4926
2277 fd_reify (w->other); 4927 {
2278} 4928 EV_P = w->other;
2279 4929
4930 while (fdchangecnt)
4931 {
4932 fd_reify (EV_A);
4933 ev_run (EV_A_ EVRUN_NOWAIT);
4934 }
4935 }
4936}
4937
4938static void
4939embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4940{
4941 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4942
4943 ev_embed_stop (EV_A_ w);
4944
4945 {
4946 EV_P = w->other;
4947
4948 ev_loop_fork (EV_A);
4949 ev_run (EV_A_ EVRUN_NOWAIT);
4950 }
4951
4952 ev_embed_start (EV_A_ w);
4953}
4954
4955#if 0
4956static void
4957embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4958{
4959 ev_idle_stop (EV_A_ idle);
4960}
4961#endif
4962
2280void 4963void
2281ev_embed_start (EV_P_ ev_embed *w) 4964ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2282{ 4965{
2283 if (expect_false (ev_is_active (w))) 4966 if (ecb_expect_false (ev_is_active (w)))
2284 return; 4967 return;
2285 4968
2286 { 4969 {
2287 struct ev_loop *loop = w->other; 4970 EV_P = w->other;
2288 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4971 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2289 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4972 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2290 } 4973 }
4974
4975 EV_FREQUENT_CHECK;
2291 4976
2292 ev_set_priority (&w->io, ev_priority (w)); 4977 ev_set_priority (&w->io, ev_priority (w));
2293 ev_io_start (EV_A_ &w->io); 4978 ev_io_start (EV_A_ &w->io);
2294 4979
2295 ev_prepare_init (&w->prepare, embed_prepare_cb); 4980 ev_prepare_init (&w->prepare, embed_prepare_cb);
2296 ev_set_priority (&w->prepare, EV_MINPRI); 4981 ev_set_priority (&w->prepare, EV_MINPRI);
2297 ev_prepare_start (EV_A_ &w->prepare); 4982 ev_prepare_start (EV_A_ &w->prepare);
2298 4983
4984 ev_fork_init (&w->fork, embed_fork_cb);
4985 ev_fork_start (EV_A_ &w->fork);
4986
4987 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4988
2299 ev_start (EV_A_ (W)w, 1); 4989 ev_start (EV_A_ (W)w, 1);
2300}
2301 4990
4991 EV_FREQUENT_CHECK;
4992}
4993
2302void 4994void
2303ev_embed_stop (EV_P_ ev_embed *w) 4995ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
2304{ 4996{
2305 clear_pending (EV_A_ (W)w); 4997 clear_pending (EV_A_ (W)w);
2306 if (expect_false (!ev_is_active (w))) 4998 if (ecb_expect_false (!ev_is_active (w)))
2307 return; 4999 return;
2308 5000
5001 EV_FREQUENT_CHECK;
5002
2309 ev_io_stop (EV_A_ &w->io); 5003 ev_io_stop (EV_A_ &w->io);
2310 ev_prepare_stop (EV_A_ &w->prepare); 5004 ev_prepare_stop (EV_A_ &w->prepare);
5005 ev_fork_stop (EV_A_ &w->fork);
2311 5006
2312 ev_stop (EV_A_ (W)w); 5007 ev_stop (EV_A_ (W)w);
5008
5009 EV_FREQUENT_CHECK;
2313} 5010}
2314#endif 5011#endif
2315 5012
2316#if EV_FORK_ENABLE 5013#if EV_FORK_ENABLE
2317void 5014void
2318ev_fork_start (EV_P_ ev_fork *w) 5015ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
2319{ 5016{
2320 if (expect_false (ev_is_active (w))) 5017 if (ecb_expect_false (ev_is_active (w)))
2321 return; 5018 return;
2322 5019
5020 EV_FREQUENT_CHECK;
5021
2323 ev_start (EV_A_ (W)w, ++forkcnt); 5022 ev_start (EV_A_ (W)w, ++forkcnt);
2324 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5023 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
2325 forks [forkcnt - 1] = w; 5024 forks [forkcnt - 1] = w;
2326}
2327 5025
5026 EV_FREQUENT_CHECK;
5027}
5028
2328void 5029void
2329ev_fork_stop (EV_P_ ev_fork *w) 5030ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
2330{ 5031{
2331 clear_pending (EV_A_ (W)w); 5032 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w))) 5033 if (ecb_expect_false (!ev_is_active (w)))
2333 return; 5034 return;
2334 5035
5036 EV_FREQUENT_CHECK;
5037
2335 { 5038 {
2336 int active = ((W)w)->active; 5039 int active = ev_active (w);
5040
2337 forks [active - 1] = forks [--forkcnt]; 5041 forks [active - 1] = forks [--forkcnt];
2338 ((W)forks [active - 1])->active = active; 5042 ev_active (forks [active - 1]) = active;
2339 } 5043 }
2340 5044
2341 ev_stop (EV_A_ (W)w); 5045 ev_stop (EV_A_ (W)w);
5046
5047 EV_FREQUENT_CHECK;
5048}
5049#endif
5050
5051#if EV_CLEANUP_ENABLE
5052void
5053ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5054{
5055 if (ecb_expect_false (ev_is_active (w)))
5056 return;
5057
5058 EV_FREQUENT_CHECK;
5059
5060 ev_start (EV_A_ (W)w, ++cleanupcnt);
5061 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5062 cleanups [cleanupcnt - 1] = w;
5063
5064 /* cleanup watchers should never keep a refcount on the loop */
5065 ev_unref (EV_A);
5066 EV_FREQUENT_CHECK;
5067}
5068
5069void
5070ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5071{
5072 clear_pending (EV_A_ (W)w);
5073 if (ecb_expect_false (!ev_is_active (w)))
5074 return;
5075
5076 EV_FREQUENT_CHECK;
5077 ev_ref (EV_A);
5078
5079 {
5080 int active = ev_active (w);
5081
5082 cleanups [active - 1] = cleanups [--cleanupcnt];
5083 ev_active (cleanups [active - 1]) = active;
5084 }
5085
5086 ev_stop (EV_A_ (W)w);
5087
5088 EV_FREQUENT_CHECK;
5089}
5090#endif
5091
5092#if EV_ASYNC_ENABLE
5093void
5094ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
5095{
5096 if (ecb_expect_false (ev_is_active (w)))
5097 return;
5098
5099 w->sent = 0;
5100
5101 evpipe_init (EV_A);
5102
5103 EV_FREQUENT_CHECK;
5104
5105 ev_start (EV_A_ (W)w, ++asynccnt);
5106 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
5107 asyncs [asynccnt - 1] = w;
5108
5109 EV_FREQUENT_CHECK;
5110}
5111
5112void
5113ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
5114{
5115 clear_pending (EV_A_ (W)w);
5116 if (ecb_expect_false (!ev_is_active (w)))
5117 return;
5118
5119 EV_FREQUENT_CHECK;
5120
5121 {
5122 int active = ev_active (w);
5123
5124 asyncs [active - 1] = asyncs [--asynccnt];
5125 ev_active (asyncs [active - 1]) = active;
5126 }
5127
5128 ev_stop (EV_A_ (W)w);
5129
5130 EV_FREQUENT_CHECK;
5131}
5132
5133void
5134ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
5135{
5136 w->sent = 1;
5137 evpipe_write (EV_A_ &async_pending);
2342} 5138}
2343#endif 5139#endif
2344 5140
2345/*****************************************************************************/ 5141/*****************************************************************************/
2346 5142
… …
2356once_cb (EV_P_ struct ev_once *once, int revents) 5152once_cb (EV_P_ struct ev_once *once, int revents)
2357{ 5153{
2358 void (*cb)(int revents, void *arg) = once->cb; 5154 void (*cb)(int revents, void *arg) = once->cb;
2359 void *arg = once->arg; 5155 void *arg = once->arg;
2360 5156
2361 ev_io_stop (EV_A_ &once->io); 5157 ev_io_stop (EV_A_ &once->io);
2362 ev_timer_stop (EV_A_ &once->to); 5158 ev_timer_stop (EV_A_ &once->to);
2363 ev_free (once); 5159 ev_free (once);
2364 5160
2365 cb (revents, arg); 5161 cb (revents, arg);
2366} 5162}
2367 5163
2368static void 5164static void
2369once_cb_io (EV_P_ ev_io *w, int revents) 5165once_cb_io (EV_P_ ev_io *w, int revents)
2370{ 5166{
2371 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 5167 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5168
5169 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2372} 5170}
2373 5171
2374static void 5172static void
2375once_cb_to (EV_P_ ev_timer *w, int revents) 5173once_cb_to (EV_P_ ev_timer *w, int revents)
2376{ 5174{
2377 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 5175 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2378}
2379 5176
5177 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
5178}
5179
2380void 5180void
2381ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5181ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
2382{ 5182{
2383 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5183 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2384
2385 if (expect_false (!once))
2386 {
2387 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2388 return;
2389 }
2390 5184
2391 once->cb = cb; 5185 once->cb = cb;
2392 once->arg = arg; 5186 once->arg = arg;
2393 5187
2394 ev_init (&once->io, once_cb_io); 5188 ev_init (&once->io, once_cb_io);
… …
2404 ev_timer_set (&once->to, timeout, 0.); 5198 ev_timer_set (&once->to, timeout, 0.);
2405 ev_timer_start (EV_A_ &once->to); 5199 ev_timer_start (EV_A_ &once->to);
2406 } 5200 }
2407} 5201}
2408 5202
5203/*****************************************************************************/
5204
5205#if EV_WALK_ENABLE
5206ecb_cold
5207void
5208ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5209{
5210 int i, j;
5211 ev_watcher_list *wl, *wn;
5212
5213 if (types & (EV_IO | EV_EMBED))
5214 for (i = 0; i < anfdmax; ++i)
5215 for (wl = anfds [i].head; wl; )
5216 {
5217 wn = wl->next;
5218
5219#if EV_EMBED_ENABLE
5220 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5221 {
5222 if (types & EV_EMBED)
5223 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5224 }
5225 else
5226#endif
5227#if EV_USE_INOTIFY
5228 if (ev_cb ((ev_io *)wl) == infy_cb)
5229 ;
5230 else
5231#endif
5232 if ((ev_io *)wl != &pipe_w)
5233 if (types & EV_IO)
5234 cb (EV_A_ EV_IO, wl);
5235
5236 wl = wn;
5237 }
5238
5239 if (types & (EV_TIMER | EV_STAT))
5240 for (i = timercnt + HEAP0; i-- > HEAP0; )
5241#if EV_STAT_ENABLE
5242 /*TODO: timer is not always active*/
5243 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5244 {
5245 if (types & EV_STAT)
5246 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5247 }
5248 else
5249#endif
5250 if (types & EV_TIMER)
5251 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5252
5253#if EV_PERIODIC_ENABLE
5254 if (types & EV_PERIODIC)
5255 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5256 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5257#endif
5258
5259#if EV_IDLE_ENABLE
5260 if (types & EV_IDLE)
5261 for (j = NUMPRI; j--; )
5262 for (i = idlecnt [j]; i--; )
5263 cb (EV_A_ EV_IDLE, idles [j][i]);
5264#endif
5265
5266#if EV_FORK_ENABLE
5267 if (types & EV_FORK)
5268 for (i = forkcnt; i--; )
5269 if (ev_cb (forks [i]) != embed_fork_cb)
5270 cb (EV_A_ EV_FORK, forks [i]);
5271#endif
5272
5273#if EV_ASYNC_ENABLE
5274 if (types & EV_ASYNC)
5275 for (i = asynccnt; i--; )
5276 cb (EV_A_ EV_ASYNC, asyncs [i]);
5277#endif
5278
5279#if EV_PREPARE_ENABLE
5280 if (types & EV_PREPARE)
5281 for (i = preparecnt; i--; )
5282# if EV_EMBED_ENABLE
5283 if (ev_cb (prepares [i]) != embed_prepare_cb)
5284# endif
5285 cb (EV_A_ EV_PREPARE, prepares [i]);
5286#endif
5287
5288#if EV_CHECK_ENABLE
5289 if (types & EV_CHECK)
5290 for (i = checkcnt; i--; )
5291 cb (EV_A_ EV_CHECK, checks [i]);
5292#endif
5293
5294#if EV_SIGNAL_ENABLE
5295 if (types & EV_SIGNAL)
5296 for (i = 0; i < EV_NSIG - 1; ++i)
5297 for (wl = signals [i].head; wl; )
5298 {
5299 wn = wl->next;
5300 cb (EV_A_ EV_SIGNAL, wl);
5301 wl = wn;
5302 }
5303#endif
5304
5305#if EV_CHILD_ENABLE
5306 if (types & EV_CHILD)
5307 for (i = (EV_PID_HASHSIZE); i--; )
5308 for (wl = childs [i]; wl; )
5309 {
5310 wn = wl->next;
5311 cb (EV_A_ EV_CHILD, wl);
5312 wl = wn;
5313 }
5314#endif
5315/* EV_STAT 0x00001000 /* stat data changed */
5316/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5317}
5318#endif
5319
2409#if EV_MULTIPLICITY 5320#if EV_MULTIPLICITY
2410 #include "ev_wrap.h" 5321 #include "ev_wrap.h"
2411#endif 5322#endif
2412 5323
2413#ifdef __cplusplus
2414}
2415#endif
2416

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