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Comparing libev/ev.c (file contents):
Revision 1.285 by root, Wed Apr 15 19:35:53 2009 UTC vs.
Revision 1.488 by root, Fri Dec 21 06:57:09 2018 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2018 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 modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 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 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
46# endif
47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
50# endif 52# endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
62# endif 66# endif
63 67
64# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
… …
75# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
77# endif 81# endif
78# endif 82# endif
79 83
84# if HAVE_NANOSLEEP
80# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
83# else 88# else
89# undef EV_USE_NANOSLEEP
84# 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
85# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
86# endif 100# endif
87 101
102# if HAVE_POLL && HAVE_POLL_H
88# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
89# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif 105# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else 106# else
107# undef EV_USE_POLL
100# define EV_USE_POLL 0 108# define EV_USE_POLL 0
101# endif
102# endif 109# endif
103 110
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
107# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# define EV_USE_EPOLL 0
109# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
110# endif 118# endif
111 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
112# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
118# endif 127# endif
119 128
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
123# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
124# define EV_USE_PORT 0
125# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
126# endif 136# endif
127 137
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
131# else
132# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
133# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
134# endif 145# endif
135 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
136# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
137# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
142# endif 163# endif
143 164
144#endif 165#endif
145 166
146#include <math.h> 167/* OS X, in its infinite idiocy, actually HARDCODES
168 * a limit of 1024 into their select. Where people have brains,
169 * OS X engineers apparently have a vacuum. Or maybe they were
170 * ordered to have a vacuum, or they do anything for money.
171 * This might help. Or not.
172 * Note that this must be defined early, as other include files
173 * will rely on this define as well.
174 */
175#define _DARWIN_UNLIMITED_SELECT 1
176
147#include <stdlib.h> 177#include <stdlib.h>
178#include <string.h>
148#include <fcntl.h> 179#include <fcntl.h>
149#include <stddef.h> 180#include <stddef.h>
150 181
151#include <stdio.h> 182#include <stdio.h>
152 183
153#include <assert.h> 184#include <assert.h>
154#include <errno.h> 185#include <errno.h>
155#include <sys/types.h> 186#include <sys/types.h>
156#include <time.h> 187#include <time.h>
188#include <limits.h>
157 189
158#include <signal.h> 190#include <signal.h>
159 191
160#ifdef EV_H 192#ifdef EV_H
161# include EV_H 193# include EV_H
162#else 194#else
163# include "ev.h" 195# include "ev.h"
196#endif
197
198#if EV_NO_THREADS
199# undef EV_NO_SMP
200# define EV_NO_SMP 1
201# undef ECB_NO_THREADS
202# define ECB_NO_THREADS 1
203#endif
204#if EV_NO_SMP
205# undef EV_NO_SMP
206# define ECB_NO_SMP 1
164#endif 207#endif
165 208
166#ifndef _WIN32 209#ifndef _WIN32
167# include <sys/time.h> 210# include <sys/time.h>
168# include <sys/wait.h> 211# include <sys/wait.h>
169# include <unistd.h> 212# include <unistd.h>
170#else 213#else
171# include <io.h> 214# include <io.h>
172# define WIN32_LEAN_AND_MEAN 215# define WIN32_LEAN_AND_MEAN
216# include <winsock2.h>
173# include <windows.h> 217# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET 218# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1 219# define EV_SELECT_IS_WINSOCKET 1
176# endif 220# endif
221# undef EV_AVOID_STDIO
177#endif 222#endif
178 223
179/* this block tries to deduce configuration from header-defined symbols and defaults */ 224/* this block tries to deduce configuration from header-defined symbols and defaults */
180 225
226/* try to deduce the maximum number of signals on this platform */
227#if defined EV_NSIG
228/* use what's provided */
229#elif defined NSIG
230# define EV_NSIG (NSIG)
231#elif defined _NSIG
232# define EV_NSIG (_NSIG)
233#elif defined SIGMAX
234# define EV_NSIG (SIGMAX+1)
235#elif defined SIG_MAX
236# define EV_NSIG (SIG_MAX+1)
237#elif defined _SIG_MAX
238# define EV_NSIG (_SIG_MAX+1)
239#elif defined MAXSIG
240# define EV_NSIG (MAXSIG+1)
241#elif defined MAX_SIG
242# define EV_NSIG (MAX_SIG+1)
243#elif defined SIGARRAYSIZE
244# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
245#elif defined _sys_nsig
246# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
247#else
248# define EV_NSIG (8 * sizeof (sigset_t) + 1)
249#endif
250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
181#ifndef EV_USE_CLOCK_SYSCALL 255#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2 256# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
183# define EV_USE_CLOCK_SYSCALL 1 257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
184# else 258# else
185# define EV_USE_CLOCK_SYSCALL 0 259# define EV_USE_CLOCK_SYSCALL 0
186# endif 260# endif
187#endif 261#endif
188 262
263#if !(_POSIX_TIMERS > 0)
264# ifndef EV_USE_MONOTONIC
265# define EV_USE_MONOTONIC 0
266# endif
267# ifndef EV_USE_REALTIME
268# define EV_USE_REALTIME 0
269# endif
270#endif
271
189#ifndef EV_USE_MONOTONIC 272#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 273# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1 274# define EV_USE_MONOTONIC EV_FEATURE_OS
192# else 275# else
193# define EV_USE_MONOTONIC 0 276# define EV_USE_MONOTONIC 0
194# endif 277# endif
195#endif 278#endif
196 279
… …
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 281# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif 282#endif
200 283
201#ifndef EV_USE_NANOSLEEP 284#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L 285# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1 286# define EV_USE_NANOSLEEP EV_FEATURE_OS
204# else 287# else
205# define EV_USE_NANOSLEEP 0 288# define EV_USE_NANOSLEEP 0
206# endif 289# endif
207#endif 290#endif
208 291
209#ifndef EV_USE_SELECT 292#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1 293# define EV_USE_SELECT EV_FEATURE_BACKENDS
211#endif 294#endif
212 295
213#ifndef EV_USE_POLL 296#ifndef EV_USE_POLL
214# ifdef _WIN32 297# ifdef _WIN32
215# define EV_USE_POLL 0 298# define EV_USE_POLL 0
216# else 299# else
217# define EV_USE_POLL 1 300# define EV_USE_POLL EV_FEATURE_BACKENDS
218# endif 301# endif
219#endif 302#endif
220 303
221#ifndef EV_USE_EPOLL 304#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 305# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1 306# define EV_USE_EPOLL EV_FEATURE_BACKENDS
224# else 307# else
225# define EV_USE_EPOLL 0 308# define EV_USE_EPOLL 0
226# endif 309# endif
227#endif 310#endif
228 311
… …
234# define EV_USE_PORT 0 317# define EV_USE_PORT 0
235#endif 318#endif
236 319
237#ifndef EV_USE_INOTIFY 320#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 321# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1 322# define EV_USE_INOTIFY EV_FEATURE_OS
240# else 323# else
241# define EV_USE_INOTIFY 0 324# define EV_USE_INOTIFY 0
242# endif 325# endif
243#endif 326#endif
244 327
245#ifndef EV_PID_HASHSIZE 328#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL 329# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif 330#endif
252 331
253#ifndef EV_INOTIFY_HASHSIZE 332#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL 333# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif 334#endif
260 335
261#ifndef EV_USE_EVENTFD 336#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1 338# define EV_USE_EVENTFD EV_FEATURE_OS
264# else 339# else
265# define EV_USE_EVENTFD 0 340# define EV_USE_EVENTFD 0
341# endif
342#endif
343
344#ifndef EV_USE_SIGNALFD
345# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
346# define EV_USE_SIGNALFD EV_FEATURE_OS
347# else
348# define EV_USE_SIGNALFD 0
266# endif 349# endif
267#endif 350#endif
268 351
269#if 0 /* debugging */ 352#if 0 /* debugging */
270# define EV_VERIFY 3 353# define EV_VERIFY 3
271# define EV_USE_4HEAP 1 354# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1 355# define EV_HEAP_CACHE_AT 1
273#endif 356#endif
274 357
275#ifndef EV_VERIFY 358#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL 359# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
277#endif 360#endif
278 361
279#ifndef EV_USE_4HEAP 362#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL 363# define EV_USE_4HEAP EV_FEATURE_DATA
281#endif 364#endif
282 365
283#ifndef EV_HEAP_CACHE_AT 366#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL 367# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
368#endif
369
370#ifdef __ANDROID__
371/* supposedly, android doesn't typedef fd_mask */
372# undef EV_USE_SELECT
373# define EV_USE_SELECT 0
374/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
375# undef EV_USE_CLOCK_SYSCALL
376# define EV_USE_CLOCK_SYSCALL 0
377#endif
378
379/* aix's poll.h seems to cause lots of trouble */
380#ifdef _AIX
381/* AIX has a completely broken poll.h header */
382# undef EV_USE_POLL
383# define EV_USE_POLL 0
384#endif
385
386/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
387/* which makes programs even slower. might work on other unices, too. */
388#if EV_USE_CLOCK_SYSCALL
389# include <sys/syscall.h>
390# ifdef SYS_clock_gettime
391# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
392# undef EV_USE_MONOTONIC
393# define EV_USE_MONOTONIC 1
394# else
395# undef EV_USE_CLOCK_SYSCALL
396# define EV_USE_CLOCK_SYSCALL 0
397# endif
285#endif 398#endif
286 399
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 400/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288 401
289#ifndef CLOCK_MONOTONIC 402#ifndef CLOCK_MONOTONIC
… …
300# undef EV_USE_INOTIFY 413# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0 414# define EV_USE_INOTIFY 0
302#endif 415#endif
303 416
304#if !EV_USE_NANOSLEEP 417#if !EV_USE_NANOSLEEP
305# ifndef _WIN32 418/* hp-ux has it in sys/time.h, which we unconditionally include above */
419# if !defined _WIN32 && !defined __hpux
306# include <sys/select.h> 420# include <sys/select.h>
307# endif 421# endif
308#endif 422#endif
309 423
310#if EV_USE_INOTIFY 424#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h> 425# include <sys/statfs.h>
313# include <sys/inotify.h> 426# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 427/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW 428# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY 429# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0 430# define EV_USE_INOTIFY 0
318# endif 431# endif
319#endif 432#endif
320 433
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD 434#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 435/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h> 436# include <stdint.h>
337# ifdef __cplusplus 437# ifndef EFD_NONBLOCK
338extern "C" { 438# define EFD_NONBLOCK O_NONBLOCK
339# endif 439# endif
340int eventfd (unsigned int initval, int flags); 440# ifndef EFD_CLOEXEC
341# ifdef __cplusplus 441# ifdef O_CLOEXEC
342} 442# define EFD_CLOEXEC O_CLOEXEC
443# else
444# define EFD_CLOEXEC 02000000
445# endif
343# endif 446# endif
447EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
448#endif
449
450#if EV_USE_SIGNALFD
451/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
452# include <stdint.h>
453# ifndef SFD_NONBLOCK
454# define SFD_NONBLOCK O_NONBLOCK
455# endif
456# ifndef SFD_CLOEXEC
457# ifdef O_CLOEXEC
458# define SFD_CLOEXEC O_CLOEXEC
459# else
460# define SFD_CLOEXEC 02000000
461# endif
462# endif
463EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
464
465struct signalfd_siginfo
466{
467 uint32_t ssi_signo;
468 char pad[128 - sizeof (uint32_t)];
469};
344#endif 470#endif
345 471
346/**/ 472/**/
347 473
348#if EV_VERIFY >= 3 474#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 475# define EV_FREQUENT_CHECK ev_verify (EV_A)
350#else 476#else
351# define EV_FREQUENT_CHECK do { } while (0) 477# define EV_FREQUENT_CHECK do { } while (0)
352#endif 478#endif
353 479
354/* 480/*
355 * This is used to avoid floating point rounding problems. 481 * This is used to work around floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000. 482 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */ 483 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 484#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
485/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
363 486
364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 487#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 488#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367 489
490#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
491#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
492
493/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
494/* ECB.H BEGIN */
495/*
496 * libecb - http://software.schmorp.de/pkg/libecb
497 *
498 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
499 * Copyright (©) 2011 Emanuele Giaquinta
500 * All rights reserved.
501 *
502 * Redistribution and use in source and binary forms, with or without modifica-
503 * tion, are permitted provided that the following conditions are met:
504 *
505 * 1. Redistributions of source code must retain the above copyright notice,
506 * this list of conditions and the following disclaimer.
507 *
508 * 2. Redistributions in binary form must reproduce the above copyright
509 * notice, this list of conditions and the following disclaimer in the
510 * documentation and/or other materials provided with the distribution.
511 *
512 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
513 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
514 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
515 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
516 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
517 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
518 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
519 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
520 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
521 * OF THE POSSIBILITY OF SUCH DAMAGE.
522 *
523 * Alternatively, the contents of this file may be used under the terms of
524 * the GNU General Public License ("GPL") version 2 or any later version,
525 * in which case the provisions of the GPL are applicable instead of
526 * the above. If you wish to allow the use of your version of this file
527 * only under the terms of the GPL and not to allow others to use your
528 * version of this file under the BSD license, indicate your decision
529 * by deleting the provisions above and replace them with the notice
530 * and other provisions required by the GPL. If you do not delete the
531 * provisions above, a recipient may use your version of this file under
532 * either the BSD or the GPL.
533 */
534
535#ifndef ECB_H
536#define ECB_H
537
538/* 16 bits major, 16 bits minor */
539#define ECB_VERSION 0x00010005
540
541#ifdef _WIN32
542 typedef signed char int8_t;
543 typedef unsigned char uint8_t;
544 typedef signed short int16_t;
545 typedef unsigned short uint16_t;
546 typedef signed int int32_t;
547 typedef unsigned int uint32_t;
368#if __GNUC__ >= 4 548 #if __GNUC__
549 typedef signed long long int64_t;
550 typedef unsigned long long uint64_t;
551 #else /* _MSC_VER || __BORLANDC__ */
552 typedef signed __int64 int64_t;
553 typedef unsigned __int64 uint64_t;
554 #endif
555 #ifdef _WIN64
556 #define ECB_PTRSIZE 8
557 typedef uint64_t uintptr_t;
558 typedef int64_t intptr_t;
559 #else
560 #define ECB_PTRSIZE 4
561 typedef uint32_t uintptr_t;
562 typedef int32_t intptr_t;
563 #endif
564#else
565 #include <inttypes.h>
566 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
567 #define ECB_PTRSIZE 8
568 #else
569 #define ECB_PTRSIZE 4
570 #endif
571#endif
572
573#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
574#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
575
576/* work around x32 idiocy by defining proper macros */
577#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
578 #if _ILP32
579 #define ECB_AMD64_X32 1
580 #else
581 #define ECB_AMD64 1
582 #endif
583#endif
584
585/* many compilers define _GNUC_ to some versions but then only implement
586 * what their idiot authors think are the "more important" extensions,
587 * causing enormous grief in return for some better fake benchmark numbers.
588 * or so.
589 * we try to detect these and simply assume they are not gcc - if they have
590 * an issue with that they should have done it right in the first place.
591 */
592#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
593 #define ECB_GCC_VERSION(major,minor) 0
594#else
595 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
596#endif
597
598#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
599
600#if __clang__ && defined __has_builtin
601 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
602#else
603 #define ECB_CLANG_BUILTIN(x) 0
604#endif
605
606#if __clang__ && defined __has_extension
607 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
608#else
609 #define ECB_CLANG_EXTENSION(x) 0
610#endif
611
612#define ECB_CPP (__cplusplus+0)
613#define ECB_CPP11 (__cplusplus >= 201103L)
614#define ECB_CPP14 (__cplusplus >= 201402L)
615#define ECB_CPP17 (__cplusplus >= 201703L)
616
617#if ECB_CPP
618 #define ECB_C 0
619 #define ECB_STDC_VERSION 0
620#else
621 #define ECB_C 1
622 #define ECB_STDC_VERSION __STDC_VERSION__
623#endif
624
625#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
626#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
627#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
628
629#if ECB_CPP
630 #define ECB_EXTERN_C extern "C"
631 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
632 #define ECB_EXTERN_C_END }
633#else
634 #define ECB_EXTERN_C extern
635 #define ECB_EXTERN_C_BEG
636 #define ECB_EXTERN_C_END
637#endif
638
639/*****************************************************************************/
640
641/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
642/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
643
644#if ECB_NO_THREADS
645 #define ECB_NO_SMP 1
646#endif
647
648#if ECB_NO_SMP
649 #define ECB_MEMORY_FENCE do { } while (0)
650#endif
651
652/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
653#if __xlC__ && ECB_CPP
654 #include <builtins.h>
655#endif
656
657#if 1400 <= _MSC_VER
658 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
659#endif
660
661#ifndef ECB_MEMORY_FENCE
662 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
663 #if __i386 || __i386__
664 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
665 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
666 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
667 #elif ECB_GCC_AMD64
668 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
669 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
670 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
671 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
672 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
673 #elif defined __ARM_ARCH_2__ \
674 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
675 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
676 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
677 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
678 || defined __ARM_ARCH_5TEJ__
679 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
680 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
681 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
682 || defined __ARM_ARCH_6T2__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
684 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
685 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
686 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
687 #elif __aarch64__
688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
689 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
693 #elif defined __s390__ || defined __s390x__
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
695 #elif defined __mips__
696 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
697 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
699 #elif defined __alpha__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
701 #elif defined __hppa__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
704 #elif defined __ia64__
705 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
706 #elif defined __m68k__
707 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
708 #elif defined __m88k__
709 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
710 #elif defined __sh__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
712 #endif
713 #endif
714#endif
715
716#ifndef ECB_MEMORY_FENCE
717 #if ECB_GCC_VERSION(4,7)
718 /* see comment below (stdatomic.h) about the C11 memory model. */
719 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
720 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
721 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
722
723 #elif ECB_CLANG_EXTENSION(c_atomic)
724 /* see comment below (stdatomic.h) about the C11 memory model. */
725 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
726 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
727 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
728
729 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
730 #define ECB_MEMORY_FENCE __sync_synchronize ()
731 #elif _MSC_VER >= 1500 /* VC++ 2008 */
732 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
737 #elif _MSC_VER >= 1400 /* VC++ 2005 */
738 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
739 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
740 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
741 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
742 #elif defined _WIN32
743 #include <WinNT.h>
744 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
745 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
746 #include <mbarrier.h>
747 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
748 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
749 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
750 #elif __xlC__
751 #define ECB_MEMORY_FENCE __sync ()
752 #endif
753#endif
754
755#ifndef ECB_MEMORY_FENCE
756 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
757 /* we assume that these memory fences work on all variables/all memory accesses, */
758 /* not just C11 atomics and atomic accesses */
759 #include <stdatomic.h>
760 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
761 /* any fence other than seq_cst, which isn't very efficient for us. */
762 /* Why that is, we don't know - either the C11 memory model is quite useless */
763 /* for most usages, or gcc and clang have a bug */
764 /* I *currently* lean towards the latter, and inefficiently implement */
765 /* all three of ecb's fences as a seq_cst fence */
766 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
767 /* for all __atomic_thread_fence's except seq_cst */
768 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
769 #endif
770#endif
771
772#ifndef ECB_MEMORY_FENCE
773 #if !ECB_AVOID_PTHREADS
774 /*
775 * if you get undefined symbol references to pthread_mutex_lock,
776 * or failure to find pthread.h, then you should implement
777 * the ECB_MEMORY_FENCE operations for your cpu/compiler
778 * OR provide pthread.h and link against the posix thread library
779 * of your system.
780 */
781 #include <pthread.h>
782 #define ECB_NEEDS_PTHREADS 1
783 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
784
785 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
786 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
787 #endif
788#endif
789
790#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
791 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
792#endif
793
794#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
795 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
796#endif
797
798/*****************************************************************************/
799
800#if ECB_CPP
801 #define ecb_inline static inline
802#elif ECB_GCC_VERSION(2,5)
803 #define ecb_inline static __inline__
804#elif ECB_C99
805 #define ecb_inline static inline
806#else
807 #define ecb_inline static
808#endif
809
810#if ECB_GCC_VERSION(3,3)
811 #define ecb_restrict __restrict__
812#elif ECB_C99
813 #define ecb_restrict restrict
814#else
815 #define ecb_restrict
816#endif
817
818typedef int ecb_bool;
819
820#define ECB_CONCAT_(a, b) a ## b
821#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
822#define ECB_STRINGIFY_(a) # a
823#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
824#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
825
826#define ecb_function_ ecb_inline
827
828#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
829 #define ecb_attribute(attrlist) __attribute__ (attrlist)
830#else
831 #define ecb_attribute(attrlist)
832#endif
833
834#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
835 #define ecb_is_constant(expr) __builtin_constant_p (expr)
836#else
837 /* possible C11 impl for integral types
838 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
839 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
840
841 #define ecb_is_constant(expr) 0
842#endif
843
844#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
369# define expect(expr,value) __builtin_expect ((expr),(value)) 845 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else 846#else
372# define expect(expr,value) (expr) 847 #define ecb_expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif 848#endif
377#endif
378 849
850#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
851 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
852#else
853 #define ecb_prefetch(addr,rw,locality)
854#endif
855
856/* no emulation for ecb_decltype */
857#if ECB_CPP11
858 // older implementations might have problems with decltype(x)::type, work around it
859 template<class T> struct ecb_decltype_t { typedef T type; };
860 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
861#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
862 #define ecb_decltype(x) __typeof__ (x)
863#endif
864
865#if _MSC_VER >= 1300
866 #define ecb_deprecated __declspec (deprecated)
867#else
868 #define ecb_deprecated ecb_attribute ((__deprecated__))
869#endif
870
871#if _MSC_VER >= 1500
872 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
873#elif ECB_GCC_VERSION(4,5)
874 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
875#else
876 #define ecb_deprecated_message(msg) ecb_deprecated
877#endif
878
879#if _MSC_VER >= 1400
880 #define ecb_noinline __declspec (noinline)
881#else
882 #define ecb_noinline ecb_attribute ((__noinline__))
883#endif
884
885#define ecb_unused ecb_attribute ((__unused__))
886#define ecb_const ecb_attribute ((__const__))
887#define ecb_pure ecb_attribute ((__pure__))
888
889#if ECB_C11 || __IBMC_NORETURN
890 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
891 #define ecb_noreturn _Noreturn
892#elif ECB_CPP11
893 #define ecb_noreturn [[noreturn]]
894#elif _MSC_VER >= 1200
895 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
896 #define ecb_noreturn __declspec (noreturn)
897#else
898 #define ecb_noreturn ecb_attribute ((__noreturn__))
899#endif
900
901#if ECB_GCC_VERSION(4,3)
902 #define ecb_artificial ecb_attribute ((__artificial__))
903 #define ecb_hot ecb_attribute ((__hot__))
904 #define ecb_cold ecb_attribute ((__cold__))
905#else
906 #define ecb_artificial
907 #define ecb_hot
908 #define ecb_cold
909#endif
910
911/* put around conditional expressions if you are very sure that the */
912/* expression is mostly true or mostly false. note that these return */
913/* booleans, not the expression. */
379#define expect_false(expr) expect ((expr) != 0, 0) 914#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
380#define expect_true(expr) expect ((expr) != 0, 1) 915#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
916/* for compatibility to the rest of the world */
917#define ecb_likely(expr) ecb_expect_true (expr)
918#define ecb_unlikely(expr) ecb_expect_false (expr)
919
920/* count trailing zero bits and count # of one bits */
921#if ECB_GCC_VERSION(3,4) \
922 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
923 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
924 && ECB_CLANG_BUILTIN(__builtin_popcount))
925 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
926 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
927 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
928 #define ecb_ctz32(x) __builtin_ctz (x)
929 #define ecb_ctz64(x) __builtin_ctzll (x)
930 #define ecb_popcount32(x) __builtin_popcount (x)
931 /* no popcountll */
932#else
933 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
934 ecb_function_ ecb_const int
935 ecb_ctz32 (uint32_t x)
936 {
937#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
938 unsigned long r;
939 _BitScanForward (&r, x);
940 return (int)r;
941#else
942 int r = 0;
943
944 x &= ~x + 1; /* this isolates the lowest bit */
945
946#if ECB_branchless_on_i386
947 r += !!(x & 0xaaaaaaaa) << 0;
948 r += !!(x & 0xcccccccc) << 1;
949 r += !!(x & 0xf0f0f0f0) << 2;
950 r += !!(x & 0xff00ff00) << 3;
951 r += !!(x & 0xffff0000) << 4;
952#else
953 if (x & 0xaaaaaaaa) r += 1;
954 if (x & 0xcccccccc) r += 2;
955 if (x & 0xf0f0f0f0) r += 4;
956 if (x & 0xff00ff00) r += 8;
957 if (x & 0xffff0000) r += 16;
958#endif
959
960 return r;
961#endif
962 }
963
964 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
965 ecb_function_ ecb_const int
966 ecb_ctz64 (uint64_t x)
967 {
968#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
969 unsigned long r;
970 _BitScanForward64 (&r, x);
971 return (int)r;
972#else
973 int shift = x & 0xffffffff ? 0 : 32;
974 return ecb_ctz32 (x >> shift) + shift;
975#endif
976 }
977
978 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
979 ecb_function_ ecb_const int
980 ecb_popcount32 (uint32_t x)
981 {
982 x -= (x >> 1) & 0x55555555;
983 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
984 x = ((x >> 4) + x) & 0x0f0f0f0f;
985 x *= 0x01010101;
986
987 return x >> 24;
988 }
989
990 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
991 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
992 {
993#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanReverse (&r, x);
996 return (int)r;
997#else
998 int r = 0;
999
1000 if (x >> 16) { x >>= 16; r += 16; }
1001 if (x >> 8) { x >>= 8; r += 8; }
1002 if (x >> 4) { x >>= 4; r += 4; }
1003 if (x >> 2) { x >>= 2; r += 2; }
1004 if (x >> 1) { r += 1; }
1005
1006 return r;
1007#endif
1008 }
1009
1010 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1011 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1012 {
1013#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1014 unsigned long r;
1015 _BitScanReverse64 (&r, x);
1016 return (int)r;
1017#else
1018 int r = 0;
1019
1020 if (x >> 32) { x >>= 32; r += 32; }
1021
1022 return r + ecb_ld32 (x);
1023#endif
1024 }
1025#endif
1026
1027ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1028ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1029ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1030ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1031
1032ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1033ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1034{
1035 return ( (x * 0x0802U & 0x22110U)
1036 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1037}
1038
1039ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1040ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1041{
1042 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1043 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1044 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1045 x = ( x >> 8 ) | ( x << 8);
1046
1047 return x;
1048}
1049
1050ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1051ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1052{
1053 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1054 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1055 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1056 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1057 x = ( x >> 16 ) | ( x << 16);
1058
1059 return x;
1060}
1061
1062/* popcount64 is only available on 64 bit cpus as gcc builtin */
1063/* so for this version we are lazy */
1064ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1065ecb_function_ ecb_const int
1066ecb_popcount64 (uint64_t x)
1067{
1068 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1069}
1070
1071ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1072ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1073ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1074ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1075ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1076ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1077ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1078ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1079
1080ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1081ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1082ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1083ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1084ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1085ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1086ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1087ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1088
1089#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1090 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1091 #define ecb_bswap16(x) __builtin_bswap16 (x)
1092 #else
1093 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1094 #endif
1095 #define ecb_bswap32(x) __builtin_bswap32 (x)
1096 #define ecb_bswap64(x) __builtin_bswap64 (x)
1097#elif _MSC_VER
1098 #include <stdlib.h>
1099 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1100 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1101 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1102#else
1103 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1104 ecb_function_ ecb_const uint16_t
1105 ecb_bswap16 (uint16_t x)
1106 {
1107 return ecb_rotl16 (x, 8);
1108 }
1109
1110 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1111 ecb_function_ ecb_const uint32_t
1112 ecb_bswap32 (uint32_t x)
1113 {
1114 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1115 }
1116
1117 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1118 ecb_function_ ecb_const uint64_t
1119 ecb_bswap64 (uint64_t x)
1120 {
1121 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1122 }
1123#endif
1124
1125#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1126 #define ecb_unreachable() __builtin_unreachable ()
1127#else
1128 /* this seems to work fine, but gcc always emits a warning for it :/ */
1129 ecb_inline ecb_noreturn void ecb_unreachable (void);
1130 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1131#endif
1132
1133/* try to tell the compiler that some condition is definitely true */
1134#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1135
1136ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1137ecb_inline ecb_const uint32_t
1138ecb_byteorder_helper (void)
1139{
1140 /* the union code still generates code under pressure in gcc, */
1141 /* but less than using pointers, and always seems to */
1142 /* successfully return a constant. */
1143 /* the reason why we have this horrible preprocessor mess */
1144 /* is to avoid it in all cases, at least on common architectures */
1145 /* or when using a recent enough gcc version (>= 4.6) */
1146#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1147 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1148 #define ECB_LITTLE_ENDIAN 1
1149 return 0x44332211;
1150#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1151 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1152 #define ECB_BIG_ENDIAN 1
1153 return 0x11223344;
1154#else
1155 union
1156 {
1157 uint8_t c[4];
1158 uint32_t u;
1159 } u = { 0x11, 0x22, 0x33, 0x44 };
1160 return u.u;
1161#endif
1162}
1163
1164ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1165ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1166ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1167ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1168
1169#if ECB_GCC_VERSION(3,0) || ECB_C99
1170 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1171#else
1172 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1173#endif
1174
1175#if ECB_CPP
1176 template<typename T>
1177 static inline T ecb_div_rd (T val, T div)
1178 {
1179 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1180 }
1181 template<typename T>
1182 static inline T ecb_div_ru (T val, T div)
1183 {
1184 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1185 }
1186#else
1187 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1188 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1189#endif
1190
1191#if ecb_cplusplus_does_not_suck
1192 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1193 template<typename T, int N>
1194 static inline int ecb_array_length (const T (&arr)[N])
1195 {
1196 return N;
1197 }
1198#else
1199 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1200#endif
1201
1202ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1203ecb_function_ ecb_const uint32_t
1204ecb_binary16_to_binary32 (uint32_t x)
1205{
1206 unsigned int s = (x & 0x8000) << (31 - 15);
1207 int e = (x >> 10) & 0x001f;
1208 unsigned int m = x & 0x03ff;
1209
1210 if (ecb_expect_false (e == 31))
1211 /* infinity or NaN */
1212 e = 255 - (127 - 15);
1213 else if (ecb_expect_false (!e))
1214 {
1215 if (ecb_expect_true (!m))
1216 /* zero, handled by code below by forcing e to 0 */
1217 e = 0 - (127 - 15);
1218 else
1219 {
1220 /* subnormal, renormalise */
1221 unsigned int s = 10 - ecb_ld32 (m);
1222
1223 m = (m << s) & 0x3ff; /* mask implicit bit */
1224 e -= s - 1;
1225 }
1226 }
1227
1228 /* e and m now are normalised, or zero, (or inf or nan) */
1229 e += 127 - 15;
1230
1231 return s | (e << 23) | (m << (23 - 10));
1232}
1233
1234ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1235ecb_function_ ecb_const uint16_t
1236ecb_binary32_to_binary16 (uint32_t x)
1237{
1238 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1239 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1240 unsigned int m = x & 0x007fffff;
1241
1242 x &= 0x7fffffff;
1243
1244 /* if it's within range of binary16 normals, use fast path */
1245 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1246 {
1247 /* mantissa round-to-even */
1248 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1249
1250 /* handle overflow */
1251 if (ecb_expect_false (m >= 0x00800000))
1252 {
1253 m >>= 1;
1254 e += 1;
1255 }
1256
1257 return s | (e << 10) | (m >> (23 - 10));
1258 }
1259
1260 /* handle large numbers and infinity */
1261 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1262 return s | 0x7c00;
1263
1264 /* handle zero, subnormals and small numbers */
1265 if (ecb_expect_true (x < 0x38800000))
1266 {
1267 /* zero */
1268 if (ecb_expect_true (!x))
1269 return s;
1270
1271 /* handle subnormals */
1272
1273 /* too small, will be zero */
1274 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1275 return s;
1276
1277 m |= 0x00800000; /* make implicit bit explicit */
1278
1279 /* very tricky - we need to round to the nearest e (+10) bit value */
1280 {
1281 unsigned int bits = 14 - e;
1282 unsigned int half = (1 << (bits - 1)) - 1;
1283 unsigned int even = (m >> bits) & 1;
1284
1285 /* if this overflows, we will end up with a normalised number */
1286 m = (m + half + even) >> bits;
1287 }
1288
1289 return s | m;
1290 }
1291
1292 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1293 m >>= 13;
1294
1295 return s | 0x7c00 | m | !m;
1296}
1297
1298/*******************************************************************************/
1299/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1300
1301/* basically, everything uses "ieee pure-endian" floating point numbers */
1302/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1303#if 0 \
1304 || __i386 || __i386__ \
1305 || ECB_GCC_AMD64 \
1306 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1307 || defined __s390__ || defined __s390x__ \
1308 || defined __mips__ \
1309 || defined __alpha__ \
1310 || defined __hppa__ \
1311 || defined __ia64__ \
1312 || defined __m68k__ \
1313 || defined __m88k__ \
1314 || defined __sh__ \
1315 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1316 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1317 || defined __aarch64__
1318 #define ECB_STDFP 1
1319 #include <string.h> /* for memcpy */
1320#else
1321 #define ECB_STDFP 0
1322#endif
1323
1324#ifndef ECB_NO_LIBM
1325
1326 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1327
1328 /* only the oldest of old doesn't have this one. solaris. */
1329 #ifdef INFINITY
1330 #define ECB_INFINITY INFINITY
1331 #else
1332 #define ECB_INFINITY HUGE_VAL
1333 #endif
1334
1335 #ifdef NAN
1336 #define ECB_NAN NAN
1337 #else
1338 #define ECB_NAN ECB_INFINITY
1339 #endif
1340
1341 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1342 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1343 #define ecb_frexpf(x,e) frexpf ((x), (e))
1344 #else
1345 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1346 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1347 #endif
1348
1349 /* convert a float to ieee single/binary32 */
1350 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1351 ecb_function_ ecb_const uint32_t
1352 ecb_float_to_binary32 (float x)
1353 {
1354 uint32_t r;
1355
1356 #if ECB_STDFP
1357 memcpy (&r, &x, 4);
1358 #else
1359 /* slow emulation, works for anything but -0 */
1360 uint32_t m;
1361 int e;
1362
1363 if (x == 0e0f ) return 0x00000000U;
1364 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1365 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1366 if (x != x ) return 0x7fbfffffU;
1367
1368 m = ecb_frexpf (x, &e) * 0x1000000U;
1369
1370 r = m & 0x80000000U;
1371
1372 if (r)
1373 m = -m;
1374
1375 if (e <= -126)
1376 {
1377 m &= 0xffffffU;
1378 m >>= (-125 - e);
1379 e = -126;
1380 }
1381
1382 r |= (e + 126) << 23;
1383 r |= m & 0x7fffffU;
1384 #endif
1385
1386 return r;
1387 }
1388
1389 /* converts an ieee single/binary32 to a float */
1390 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1391 ecb_function_ ecb_const float
1392 ecb_binary32_to_float (uint32_t x)
1393 {
1394 float r;
1395
1396 #if ECB_STDFP
1397 memcpy (&r, &x, 4);
1398 #else
1399 /* emulation, only works for normals and subnormals and +0 */
1400 int neg = x >> 31;
1401 int e = (x >> 23) & 0xffU;
1402
1403 x &= 0x7fffffU;
1404
1405 if (e)
1406 x |= 0x800000U;
1407 else
1408 e = 1;
1409
1410 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1411 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1412
1413 r = neg ? -r : r;
1414 #endif
1415
1416 return r;
1417 }
1418
1419 /* convert a double to ieee double/binary64 */
1420 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1421 ecb_function_ ecb_const uint64_t
1422 ecb_double_to_binary64 (double x)
1423 {
1424 uint64_t r;
1425
1426 #if ECB_STDFP
1427 memcpy (&r, &x, 8);
1428 #else
1429 /* slow emulation, works for anything but -0 */
1430 uint64_t m;
1431 int e;
1432
1433 if (x == 0e0 ) return 0x0000000000000000U;
1434 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1435 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1436 if (x != x ) return 0X7ff7ffffffffffffU;
1437
1438 m = frexp (x, &e) * 0x20000000000000U;
1439
1440 r = m & 0x8000000000000000;;
1441
1442 if (r)
1443 m = -m;
1444
1445 if (e <= -1022)
1446 {
1447 m &= 0x1fffffffffffffU;
1448 m >>= (-1021 - e);
1449 e = -1022;
1450 }
1451
1452 r |= ((uint64_t)(e + 1022)) << 52;
1453 r |= m & 0xfffffffffffffU;
1454 #endif
1455
1456 return r;
1457 }
1458
1459 /* converts an ieee double/binary64 to a double */
1460 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1461 ecb_function_ ecb_const double
1462 ecb_binary64_to_double (uint64_t x)
1463 {
1464 double r;
1465
1466 #if ECB_STDFP
1467 memcpy (&r, &x, 8);
1468 #else
1469 /* emulation, only works for normals and subnormals and +0 */
1470 int neg = x >> 63;
1471 int e = (x >> 52) & 0x7ffU;
1472
1473 x &= 0xfffffffffffffU;
1474
1475 if (e)
1476 x |= 0x10000000000000U;
1477 else
1478 e = 1;
1479
1480 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1481 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1482
1483 r = neg ? -r : r;
1484 #endif
1485
1486 return r;
1487 }
1488
1489 /* convert a float to ieee half/binary16 */
1490 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1491 ecb_function_ ecb_const uint16_t
1492 ecb_float_to_binary16 (float x)
1493 {
1494 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1495 }
1496
1497 /* convert an ieee half/binary16 to float */
1498 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1499 ecb_function_ ecb_const float
1500 ecb_binary16_to_float (uint16_t x)
1501 {
1502 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1503 }
1504
1505#endif
1506
1507#endif
1508
1509/* ECB.H END */
1510
1511#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1512/* if your architecture doesn't need memory fences, e.g. because it is
1513 * single-cpu/core, or if you use libev in a project that doesn't use libev
1514 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1515 * libev, in which cases the memory fences become nops.
1516 * alternatively, you can remove this #error and link against libpthread,
1517 * which will then provide the memory fences.
1518 */
1519# error "memory fences not defined for your architecture, please report"
1520#endif
1521
1522#ifndef ECB_MEMORY_FENCE
1523# define ECB_MEMORY_FENCE do { } while (0)
1524# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1525# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1526#endif
1527
1528#define expect_false(cond) ecb_expect_false (cond)
1529#define expect_true(cond) ecb_expect_true (cond)
1530#define noinline ecb_noinline
1531
381#define inline_size static inline 1532#define inline_size ecb_inline
382 1533
383#if EV_MINIMAL 1534#if EV_FEATURE_CODE
384# define inline_speed static noinline
385#else
386# define inline_speed static inline 1535# define inline_speed ecb_inline
1536#else
1537# define inline_speed noinline static
387#endif 1538#endif
388 1539
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1540#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1541
1542#if EV_MINPRI == EV_MAXPRI
1543# define ABSPRI(w) (((W)w), 0)
1544#else
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1545# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1546#endif
391 1547
392#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1548#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */ 1549#define EMPTY2(a,b) /* used to suppress some warnings */
394 1550
395typedef ev_watcher *W; 1551typedef ev_watcher *W;
… …
399#define ev_active(w) ((W)(w))->active 1555#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at 1556#define ev_at(w) ((WT)(w))->at
401 1557
402#if EV_USE_REALTIME 1558#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1559/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */ 1560/* giving it a reasonably high chance of working on typical architectures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1561static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif 1562#endif
407 1563
408#if EV_USE_MONOTONIC 1564#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1565static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif 1566#endif
411 1567
1568#ifndef EV_FD_TO_WIN32_HANDLE
1569# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1570#endif
1571#ifndef EV_WIN32_HANDLE_TO_FD
1572# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1573#endif
1574#ifndef EV_WIN32_CLOSE_FD
1575# define EV_WIN32_CLOSE_FD(fd) close (fd)
1576#endif
1577
412#ifdef _WIN32 1578#ifdef _WIN32
413# include "ev_win32.c" 1579# include "ev_win32.c"
414#endif 1580#endif
415 1581
416/*****************************************************************************/ 1582/*****************************************************************************/
417 1583
1584/* define a suitable floor function (only used by periodics atm) */
1585
1586#if EV_USE_FLOOR
1587# include <math.h>
1588# define ev_floor(v) floor (v)
1589#else
1590
1591#include <float.h>
1592
1593/* a floor() replacement function, should be independent of ev_tstamp type */
1594noinline
1595static ev_tstamp
1596ev_floor (ev_tstamp v)
1597{
1598 /* the choice of shift factor is not terribly important */
1599#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1600 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1601#else
1602 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1603#endif
1604
1605 /* argument too large for an unsigned long? */
1606 if (expect_false (v >= shift))
1607 {
1608 ev_tstamp f;
1609
1610 if (v == v - 1.)
1611 return v; /* very large number */
1612
1613 f = shift * ev_floor (v * (1. / shift));
1614 return f + ev_floor (v - f);
1615 }
1616
1617 /* special treatment for negative args? */
1618 if (expect_false (v < 0.))
1619 {
1620 ev_tstamp f = -ev_floor (-v);
1621
1622 return f - (f == v ? 0 : 1);
1623 }
1624
1625 /* fits into an unsigned long */
1626 return (unsigned long)v;
1627}
1628
1629#endif
1630
1631/*****************************************************************************/
1632
1633#ifdef __linux
1634# include <sys/utsname.h>
1635#endif
1636
1637noinline ecb_cold
1638static unsigned int
1639ev_linux_version (void)
1640{
1641#ifdef __linux
1642 unsigned int v = 0;
1643 struct utsname buf;
1644 int i;
1645 char *p = buf.release;
1646
1647 if (uname (&buf))
1648 return 0;
1649
1650 for (i = 3+1; --i; )
1651 {
1652 unsigned int c = 0;
1653
1654 for (;;)
1655 {
1656 if (*p >= '0' && *p <= '9')
1657 c = c * 10 + *p++ - '0';
1658 else
1659 {
1660 p += *p == '.';
1661 break;
1662 }
1663 }
1664
1665 v = (v << 8) | c;
1666 }
1667
1668 return v;
1669#else
1670 return 0;
1671#endif
1672}
1673
1674/*****************************************************************************/
1675
1676#if EV_AVOID_STDIO
1677noinline ecb_cold
1678static void
1679ev_printerr (const char *msg)
1680{
1681 write (STDERR_FILENO, msg, strlen (msg));
1682}
1683#endif
1684
418static void (*syserr_cb)(const char *msg); 1685static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
419 1686
1687ecb_cold
420void 1688void
421ev_set_syserr_cb (void (*cb)(const char *msg)) 1689ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
422{ 1690{
423 syserr_cb = cb; 1691 syserr_cb = cb;
424} 1692}
425 1693
426static void noinline 1694noinline ecb_cold
1695static void
427ev_syserr (const char *msg) 1696ev_syserr (const char *msg)
428{ 1697{
429 if (!msg) 1698 if (!msg)
430 msg = "(libev) system error"; 1699 msg = "(libev) system error";
431 1700
432 if (syserr_cb) 1701 if (syserr_cb)
433 syserr_cb (msg); 1702 syserr_cb (msg);
434 else 1703 else
435 { 1704 {
1705#if EV_AVOID_STDIO
1706 ev_printerr (msg);
1707 ev_printerr (": ");
1708 ev_printerr (strerror (errno));
1709 ev_printerr ("\n");
1710#else
436 perror (msg); 1711 perror (msg);
1712#endif
437 abort (); 1713 abort ();
438 } 1714 }
439} 1715}
440 1716
441static void * 1717static void *
442ev_realloc_emul (void *ptr, long size) 1718ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
443{ 1719{
444 /* some systems, notably openbsd and darwin, fail to properly 1720 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and 1721 * implement realloc (x, 0) (as required by both ansi c-89 and
446 * the single unix specification, so work around them here. 1722 * the single unix specification, so work around them here.
1723 * recently, also (at least) fedora and debian started breaking it,
1724 * despite documenting it otherwise.
447 */ 1725 */
448 1726
449 if (size) 1727 if (size)
450 return realloc (ptr, size); 1728 return realloc (ptr, size);
451 1729
452 free (ptr); 1730 free (ptr);
453 return 0; 1731 return 0;
454} 1732}
455 1733
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1734static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
457 1735
1736ecb_cold
458void 1737void
459ev_set_allocator (void *(*cb)(void *ptr, long size)) 1738ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
460{ 1739{
461 alloc = cb; 1740 alloc = cb;
462} 1741}
463 1742
464inline_speed void * 1743inline_speed void *
… …
466{ 1745{
467 ptr = alloc (ptr, size); 1746 ptr = alloc (ptr, size);
468 1747
469 if (!ptr && size) 1748 if (!ptr && size)
470 { 1749 {
1750#if EV_AVOID_STDIO
1751 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1752#else
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1753 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1754#endif
472 abort (); 1755 abort ();
473 } 1756 }
474 1757
475 return ptr; 1758 return ptr;
476} 1759}
… …
478#define ev_malloc(size) ev_realloc (0, (size)) 1761#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0) 1762#define ev_free(ptr) ev_realloc ((ptr), 0)
480 1763
481/*****************************************************************************/ 1764/*****************************************************************************/
482 1765
1766/* set in reify when reification needed */
1767#define EV_ANFD_REIFY 1
1768
1769/* file descriptor info structure */
483typedef struct 1770typedef struct
484{ 1771{
485 WL head; 1772 WL head;
486 unsigned char events; 1773 unsigned char events; /* the events watched for */
487 unsigned char reify; 1774 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1775 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused; 1776 unsigned char unused;
490#if EV_USE_EPOLL 1777#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */ 1778 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif 1779#endif
493#if EV_SELECT_IS_WINSOCKET 1780#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
494 SOCKET handle; 1781 SOCKET handle;
495#endif 1782#endif
1783#if EV_USE_IOCP
1784 OVERLAPPED or, ow;
1785#endif
496} ANFD; 1786} ANFD;
497 1787
1788/* stores the pending event set for a given watcher */
498typedef struct 1789typedef struct
499{ 1790{
500 W w; 1791 W w;
501 int events; 1792 int events; /* the pending event set for the given watcher */
502} ANPENDING; 1793} ANPENDING;
503 1794
504#if EV_USE_INOTIFY 1795#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */ 1796/* hash table entry per inotify-id */
506typedef struct 1797typedef struct
… …
509} ANFS; 1800} ANFS;
510#endif 1801#endif
511 1802
512/* Heap Entry */ 1803/* Heap Entry */
513#if EV_HEAP_CACHE_AT 1804#if EV_HEAP_CACHE_AT
1805 /* a heap element */
514 typedef struct { 1806 typedef struct {
515 ev_tstamp at; 1807 ev_tstamp at;
516 WT w; 1808 WT w;
517 } ANHE; 1809 } ANHE;
518 1810
519 #define ANHE_w(he) (he).w /* access watcher, read-write */ 1811 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */ 1812 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 1813 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else 1814#else
1815 /* a heap element */
523 typedef WT ANHE; 1816 typedef WT ANHE;
524 1817
525 #define ANHE_w(he) (he) 1818 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at 1819 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he) 1820 #define ANHE_at_cache(he)
… …
538 #undef VAR 1831 #undef VAR
539 }; 1832 };
540 #include "ev_wrap.h" 1833 #include "ev_wrap.h"
541 1834
542 static struct ev_loop default_loop_struct; 1835 static struct ev_loop default_loop_struct;
543 struct ev_loop *ev_default_loop_ptr; 1836 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
544 1837
545#else 1838#else
546 1839
547 ev_tstamp ev_rt_now; 1840 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
548 #define VAR(name,decl) static decl; 1841 #define VAR(name,decl) static decl;
549 #include "ev_vars.h" 1842 #include "ev_vars.h"
550 #undef VAR 1843 #undef VAR
551 1844
552 static int ev_default_loop_ptr; 1845 static int ev_default_loop_ptr;
553 1846
554#endif 1847#endif
555 1848
1849#if EV_FEATURE_API
1850# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1851# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1852# define EV_INVOKE_PENDING invoke_cb (EV_A)
1853#else
1854# define EV_RELEASE_CB (void)0
1855# define EV_ACQUIRE_CB (void)0
1856# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1857#endif
1858
1859#define EVBREAK_RECURSE 0x80
1860
556/*****************************************************************************/ 1861/*****************************************************************************/
557 1862
1863#ifndef EV_HAVE_EV_TIME
558ev_tstamp 1864ev_tstamp
559ev_time (void) 1865ev_time (void) EV_NOEXCEPT
560{ 1866{
561#if EV_USE_REALTIME 1867#if EV_USE_REALTIME
562 if (expect_true (have_realtime)) 1868 if (expect_true (have_realtime))
563 { 1869 {
564 struct timespec ts; 1870 struct timespec ts;
… …
569 1875
570 struct timeval tv; 1876 struct timeval tv;
571 gettimeofday (&tv, 0); 1877 gettimeofday (&tv, 0);
572 return tv.tv_sec + tv.tv_usec * 1e-6; 1878 return tv.tv_sec + tv.tv_usec * 1e-6;
573} 1879}
1880#endif
574 1881
575inline_size ev_tstamp 1882inline_size ev_tstamp
576get_clock (void) 1883get_clock (void)
577{ 1884{
578#if EV_USE_MONOTONIC 1885#if EV_USE_MONOTONIC
… …
587 return ev_time (); 1894 return ev_time ();
588} 1895}
589 1896
590#if EV_MULTIPLICITY 1897#if EV_MULTIPLICITY
591ev_tstamp 1898ev_tstamp
592ev_now (EV_P) 1899ev_now (EV_P) EV_NOEXCEPT
593{ 1900{
594 return ev_rt_now; 1901 return ev_rt_now;
595} 1902}
596#endif 1903#endif
597 1904
598void 1905void
599ev_sleep (ev_tstamp delay) 1906ev_sleep (ev_tstamp delay) EV_NOEXCEPT
600{ 1907{
601 if (delay > 0.) 1908 if (delay > 0.)
602 { 1909 {
603#if EV_USE_NANOSLEEP 1910#if EV_USE_NANOSLEEP
604 struct timespec ts; 1911 struct timespec ts;
605 1912
606 ts.tv_sec = (time_t)delay; 1913 EV_TS_SET (ts, delay);
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0); 1914 nanosleep (&ts, 0);
610#elif defined(_WIN32) 1915#elif defined _WIN32
1916 /* maybe this should round up, as ms is very low resolution */
1917 /* compared to select (µs) or nanosleep (ns) */
611 Sleep ((unsigned long)(delay * 1e3)); 1918 Sleep ((unsigned long)(delay * 1e3));
612#else 1919#else
613 struct timeval tv; 1920 struct timeval tv;
614 1921
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1922 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 1923 /* something not guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */ 1924 /* by older ones */
1925 EV_TV_SET (tv, delay);
621 select (0, 0, 0, 0, &tv); 1926 select (0, 0, 0, 0, &tv);
622#endif 1927#endif
623 } 1928 }
624} 1929}
625 1930
626/*****************************************************************************/ 1931/*****************************************************************************/
627 1932
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1933#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629 1934
1935/* find a suitable new size for the given array, */
1936/* hopefully by rounding to a nice-to-malloc size */
630inline_size int 1937inline_size int
631array_nextsize (int elem, int cur, int cnt) 1938array_nextsize (int elem, int cur, int cnt)
632{ 1939{
633 int ncur = cur + 1; 1940 int ncur = cur + 1;
634 1941
635 do 1942 do
636 ncur <<= 1; 1943 ncur <<= 1;
637 while (cnt > ncur); 1944 while (cnt > ncur);
638 1945
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1946 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1947 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 { 1948 {
642 ncur *= elem; 1949 ncur *= elem;
643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1950 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 ncur = ncur - sizeof (void *) * 4; 1951 ncur = ncur - sizeof (void *) * 4;
… …
646 } 1953 }
647 1954
648 return ncur; 1955 return ncur;
649} 1956}
650 1957
651static noinline void * 1958noinline ecb_cold
1959static void *
652array_realloc (int elem, void *base, int *cur, int cnt) 1960array_realloc (int elem, void *base, int *cur, int cnt)
653{ 1961{
654 *cur = array_nextsize (elem, *cur, cnt); 1962 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur); 1963 return ev_realloc (base, elem * *cur);
656} 1964}
… …
659 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1967 memset ((void *)(base), 0, sizeof (*(base)) * (count))
660 1968
661#define array_needsize(type,base,cur,cnt,init) \ 1969#define array_needsize(type,base,cur,cnt,init) \
662 if (expect_false ((cnt) > (cur))) \ 1970 if (expect_false ((cnt) > (cur))) \
663 { \ 1971 { \
664 int ocur_ = (cur); \ 1972 ecb_unused int ocur_ = (cur); \
665 (base) = (type *)array_realloc \ 1973 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \ 1974 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \ 1975 init ((base) + (ocur_), (cur) - ocur_); \
668 } 1976 }
669 1977
… …
680#define array_free(stem, idx) \ 1988#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1989 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682 1990
683/*****************************************************************************/ 1991/*****************************************************************************/
684 1992
1993/* dummy callback for pending events */
685void noinline 1994noinline
1995static void
1996pendingcb (EV_P_ ev_prepare *w, int revents)
1997{
1998}
1999
2000noinline
2001void
686ev_feed_event (EV_P_ void *w, int revents) 2002ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
687{ 2003{
688 W w_ = (W)w; 2004 W w_ = (W)w;
689 int pri = ABSPRI (w_); 2005 int pri = ABSPRI (w_);
690 2006
691 if (expect_false (w_->pending)) 2007 if (expect_false (w_->pending))
… …
695 w_->pending = ++pendingcnt [pri]; 2011 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2012 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697 pendings [pri][w_->pending - 1].w = w_; 2013 pendings [pri][w_->pending - 1].w = w_;
698 pendings [pri][w_->pending - 1].events = revents; 2014 pendings [pri][w_->pending - 1].events = revents;
699 } 2015 }
2016
2017 pendingpri = NUMPRI - 1;
700} 2018}
701 2019
702inline_speed void 2020inline_speed void
703feed_reverse (EV_P_ W w) 2021feed_reverse (EV_P_ W w)
704{ 2022{
… …
724} 2042}
725 2043
726/*****************************************************************************/ 2044/*****************************************************************************/
727 2045
728inline_speed void 2046inline_speed void
729fd_event (EV_P_ int fd, int revents) 2047fd_event_nocheck (EV_P_ int fd, int revents)
730{ 2048{
731 ANFD *anfd = anfds + fd; 2049 ANFD *anfd = anfds + fd;
732 ev_io *w; 2050 ev_io *w;
733 2051
734 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2052 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
738 if (ev) 2056 if (ev)
739 ev_feed_event (EV_A_ (W)w, ev); 2057 ev_feed_event (EV_A_ (W)w, ev);
740 } 2058 }
741} 2059}
742 2060
743void 2061/* do not submit kernel events for fds that have reify set */
2062/* because that means they changed while we were polling for new events */
2063inline_speed void
744ev_feed_fd_event (EV_P_ int fd, int revents) 2064fd_event (EV_P_ int fd, int revents)
2065{
2066 ANFD *anfd = anfds + fd;
2067
2068 if (expect_true (!anfd->reify))
2069 fd_event_nocheck (EV_A_ fd, revents);
2070}
2071
2072void
2073ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
745{ 2074{
746 if (fd >= 0 && fd < anfdmax) 2075 if (fd >= 0 && fd < anfdmax)
747 fd_event (EV_A_ fd, revents); 2076 fd_event_nocheck (EV_A_ fd, revents);
748} 2077}
749 2078
2079/* make sure the external fd watch events are in-sync */
2080/* with the kernel/libev internal state */
750inline_size void 2081inline_size void
751fd_reify (EV_P) 2082fd_reify (EV_P)
752{ 2083{
753 int i; 2084 int i;
2085
2086#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2087 for (i = 0; i < fdchangecnt; ++i)
2088 {
2089 int fd = fdchanges [i];
2090 ANFD *anfd = anfds + fd;
2091
2092 if (anfd->reify & EV__IOFDSET && anfd->head)
2093 {
2094 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2095
2096 if (handle != anfd->handle)
2097 {
2098 unsigned long arg;
2099
2100 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2101
2102 /* handle changed, but fd didn't - we need to do it in two steps */
2103 backend_modify (EV_A_ fd, anfd->events, 0);
2104 anfd->events = 0;
2105 anfd->handle = handle;
2106 }
2107 }
2108 }
2109#endif
754 2110
755 for (i = 0; i < fdchangecnt; ++i) 2111 for (i = 0; i < fdchangecnt; ++i)
756 { 2112 {
757 int fd = fdchanges [i]; 2113 int fd = fdchanges [i];
758 ANFD *anfd = anfds + fd; 2114 ANFD *anfd = anfds + fd;
759 ev_io *w; 2115 ev_io *w;
760 2116
761 unsigned char events = 0; 2117 unsigned char o_events = anfd->events;
2118 unsigned char o_reify = anfd->reify;
762 2119
763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2120 anfd->reify = 0;
764 events |= (unsigned char)w->events;
765 2121
766#if EV_SELECT_IS_WINSOCKET 2122 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
767 if (events)
768 { 2123 {
769 unsigned long arg; 2124 anfd->events = 0;
770 #ifdef EV_FD_TO_WIN32_HANDLE 2125
771 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2126 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
772 #else 2127 anfd->events |= (unsigned char)w->events;
773 anfd->handle = _get_osfhandle (fd); 2128
774 #endif 2129 if (o_events != anfd->events)
775 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2130 o_reify = EV__IOFDSET; /* actually |= */
776 } 2131 }
777#endif
778 2132
779 { 2133 if (o_reify & EV__IOFDSET)
780 unsigned char o_events = anfd->events;
781 unsigned char o_reify = anfd->reify;
782
783 anfd->reify = 0;
784 anfd->events = events;
785
786 if (o_events != events || o_reify & EV__IOFDSET)
787 backend_modify (EV_A_ fd, o_events, events); 2134 backend_modify (EV_A_ fd, o_events, anfd->events);
788 }
789 } 2135 }
790 2136
791 fdchangecnt = 0; 2137 fdchangecnt = 0;
792} 2138}
793 2139
2140/* something about the given fd changed */
794inline_size void 2141inline_size
2142void
795fd_change (EV_P_ int fd, int flags) 2143fd_change (EV_P_ int fd, int flags)
796{ 2144{
797 unsigned char reify = anfds [fd].reify; 2145 unsigned char reify = anfds [fd].reify;
798 anfds [fd].reify |= flags; 2146 anfds [fd].reify |= flags;
799 2147
… …
803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2151 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
804 fdchanges [fdchangecnt - 1] = fd; 2152 fdchanges [fdchangecnt - 1] = fd;
805 } 2153 }
806} 2154}
807 2155
2156/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
808inline_speed void 2157inline_speed ecb_cold void
809fd_kill (EV_P_ int fd) 2158fd_kill (EV_P_ int fd)
810{ 2159{
811 ev_io *w; 2160 ev_io *w;
812 2161
813 while ((w = (ev_io *)anfds [fd].head)) 2162 while ((w = (ev_io *)anfds [fd].head))
… …
815 ev_io_stop (EV_A_ w); 2164 ev_io_stop (EV_A_ w);
816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2165 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
817 } 2166 }
818} 2167}
819 2168
2169/* check whether the given fd is actually valid, for error recovery */
820inline_size int 2170inline_size ecb_cold int
821fd_valid (int fd) 2171fd_valid (int fd)
822{ 2172{
823#ifdef _WIN32 2173#ifdef _WIN32
824 return _get_osfhandle (fd) != -1; 2174 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
825#else 2175#else
826 return fcntl (fd, F_GETFD) != -1; 2176 return fcntl (fd, F_GETFD) != -1;
827#endif 2177#endif
828} 2178}
829 2179
830/* called on EBADF to verify fds */ 2180/* called on EBADF to verify fds */
831static void noinline 2181noinline ecb_cold
2182static void
832fd_ebadf (EV_P) 2183fd_ebadf (EV_P)
833{ 2184{
834 int fd; 2185 int fd;
835 2186
836 for (fd = 0; fd < anfdmax; ++fd) 2187 for (fd = 0; fd < anfdmax; ++fd)
… …
838 if (!fd_valid (fd) && errno == EBADF) 2189 if (!fd_valid (fd) && errno == EBADF)
839 fd_kill (EV_A_ fd); 2190 fd_kill (EV_A_ fd);
840} 2191}
841 2192
842/* called on ENOMEM in select/poll to kill some fds and retry */ 2193/* called on ENOMEM in select/poll to kill some fds and retry */
843static void noinline 2194noinline ecb_cold
2195static void
844fd_enomem (EV_P) 2196fd_enomem (EV_P)
845{ 2197{
846 int fd; 2198 int fd;
847 2199
848 for (fd = anfdmax; fd--; ) 2200 for (fd = anfdmax; fd--; )
849 if (anfds [fd].events) 2201 if (anfds [fd].events)
850 { 2202 {
851 fd_kill (EV_A_ fd); 2203 fd_kill (EV_A_ fd);
852 return; 2204 break;
853 } 2205 }
854} 2206}
855 2207
856/* usually called after fork if backend needs to re-arm all fds from scratch */ 2208/* usually called after fork if backend needs to re-arm all fds from scratch */
857static void noinline 2209noinline
2210static void
858fd_rearm_all (EV_P) 2211fd_rearm_all (EV_P)
859{ 2212{
860 int fd; 2213 int fd;
861 2214
862 for (fd = 0; fd < anfdmax; ++fd) 2215 for (fd = 0; fd < anfdmax; ++fd)
863 if (anfds [fd].events) 2216 if (anfds [fd].events)
864 { 2217 {
865 anfds [fd].events = 0; 2218 anfds [fd].events = 0;
866 anfds [fd].emask = 0; 2219 anfds [fd].emask = 0;
867 fd_change (EV_A_ fd, EV__IOFDSET | 1); 2220 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
868 } 2221 }
869} 2222}
870 2223
2224/* used to prepare libev internal fd's */
2225/* this is not fork-safe */
2226inline_speed void
2227fd_intern (int fd)
2228{
2229#ifdef _WIN32
2230 unsigned long arg = 1;
2231 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2232#else
2233 fcntl (fd, F_SETFD, FD_CLOEXEC);
2234 fcntl (fd, F_SETFL, O_NONBLOCK);
2235#endif
2236}
2237
871/*****************************************************************************/ 2238/*****************************************************************************/
872 2239
873/* 2240/*
874 * the heap functions want a real array index. array index 0 uis guaranteed to not 2241 * the heap functions want a real array index. array index 0 is guaranteed to not
875 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2242 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
876 * the branching factor of the d-tree. 2243 * the branching factor of the d-tree.
877 */ 2244 */
878 2245
879/* 2246/*
… …
947 2314
948 for (;;) 2315 for (;;)
949 { 2316 {
950 int c = k << 1; 2317 int c = k << 1;
951 2318
952 if (c > N + HEAP0 - 1) 2319 if (c >= N + HEAP0)
953 break; 2320 break;
954 2321
955 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2322 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956 ? 1 : 0; 2323 ? 1 : 0;
957 2324
… …
989 2356
990 heap [k] = he; 2357 heap [k] = he;
991 ev_active (ANHE_w (he)) = k; 2358 ev_active (ANHE_w (he)) = k;
992} 2359}
993 2360
2361/* move an element suitably so it is in a correct place */
994inline_size void 2362inline_size void
995adjustheap (ANHE *heap, int N, int k) 2363adjustheap (ANHE *heap, int N, int k)
996{ 2364{
997 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2365 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
998 upheap (heap, k); 2366 upheap (heap, k);
999 else 2367 else
1000 downheap (heap, N, k); 2368 downheap (heap, N, k);
1001} 2369}
1002 2370
… …
1012 upheap (heap, i + HEAP0); 2380 upheap (heap, i + HEAP0);
1013} 2381}
1014 2382
1015/*****************************************************************************/ 2383/*****************************************************************************/
1016 2384
2385/* associate signal watchers to a signal signal */
1017typedef struct 2386typedef struct
1018{ 2387{
2388 EV_ATOMIC_T pending;
2389#if EV_MULTIPLICITY
2390 EV_P;
2391#endif
1019 WL head; 2392 WL head;
1020 EV_ATOMIC_T gotsig;
1021} ANSIG; 2393} ANSIG;
1022 2394
1023static ANSIG *signals; 2395static ANSIG signals [EV_NSIG - 1];
1024static int signalmax;
1025
1026static EV_ATOMIC_T gotsig;
1027 2396
1028/*****************************************************************************/ 2397/*****************************************************************************/
1029 2398
2399#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2400
2401noinline ecb_cold
2402static void
2403evpipe_init (EV_P)
2404{
2405 if (!ev_is_active (&pipe_w))
2406 {
2407 int fds [2];
2408
2409# if EV_USE_EVENTFD
2410 fds [0] = -1;
2411 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2412 if (fds [1] < 0 && errno == EINVAL)
2413 fds [1] = eventfd (0, 0);
2414
2415 if (fds [1] < 0)
2416# endif
2417 {
2418 while (pipe (fds))
2419 ev_syserr ("(libev) error creating signal/async pipe");
2420
2421 fd_intern (fds [0]);
2422 }
2423
2424 evpipe [0] = fds [0];
2425
2426 if (evpipe [1] < 0)
2427 evpipe [1] = fds [1]; /* first call, set write fd */
2428 else
2429 {
2430 /* on subsequent calls, do not change evpipe [1] */
2431 /* so that evpipe_write can always rely on its value. */
2432 /* this branch does not do anything sensible on windows, */
2433 /* so must not be executed on windows */
2434
2435 dup2 (fds [1], evpipe [1]);
2436 close (fds [1]);
2437 }
2438
2439 fd_intern (evpipe [1]);
2440
2441 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2442 ev_io_start (EV_A_ &pipe_w);
2443 ev_unref (EV_A); /* watcher should not keep loop alive */
2444 }
2445}
2446
1030inline_speed void 2447inline_speed void
1031fd_intern (int fd) 2448evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1032{ 2449{
1033#ifdef _WIN32 2450 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1034 unsigned long arg = 1;
1035 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1036#else
1037 fcntl (fd, F_SETFD, FD_CLOEXEC);
1038 fcntl (fd, F_SETFL, O_NONBLOCK);
1039#endif
1040}
1041 2451
1042static void noinline 2452 if (expect_true (*flag))
1043evpipe_init (EV_P) 2453 return;
1044{ 2454
1045 if (!ev_is_active (&pipeev)) 2455 *flag = 1;
2456 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2457
2458 pipe_write_skipped = 1;
2459
2460 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2461
2462 if (pipe_write_wanted)
1046 { 2463 {
2464 int old_errno;
2465
2466 pipe_write_skipped = 0;
2467 ECB_MEMORY_FENCE_RELEASE;
2468
2469 old_errno = errno; /* save errno because write will clobber it */
2470
1047#if EV_USE_EVENTFD 2471#if EV_USE_EVENTFD
1048 if ((evfd = eventfd (0, 0)) >= 0) 2472 if (evpipe [0] < 0)
1049 { 2473 {
1050 evpipe [0] = -1; 2474 uint64_t counter = 1;
1051 fd_intern (evfd); 2475 write (evpipe [1], &counter, sizeof (uint64_t));
1052 ev_io_set (&pipeev, evfd, EV_READ);
1053 } 2476 }
1054 else 2477 else
1055#endif 2478#endif
1056 { 2479 {
1057 while (pipe (evpipe)) 2480#ifdef _WIN32
1058 ev_syserr ("(libev) error creating signal/async pipe"); 2481 WSABUF buf;
1059 2482 DWORD sent;
1060 fd_intern (evpipe [0]); 2483 buf.buf = (char *)&buf;
1061 fd_intern (evpipe [1]); 2484 buf.len = 1;
1062 ev_io_set (&pipeev, evpipe [0], EV_READ); 2485 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2486#else
2487 write (evpipe [1], &(evpipe [1]), 1);
2488#endif
1063 } 2489 }
1064 2490
1065 ev_io_start (EV_A_ &pipeev); 2491 errno = old_errno;
1066 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 }
1068}
1069
1070inline_size void
1071evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072{
1073 if (!*flag)
1074 { 2492 }
1075 int old_errno = errno; /* save errno because write might clobber it */ 2493}
1076 2494
1077 *flag = 1; 2495/* called whenever the libev signal pipe */
2496/* got some events (signal, async) */
2497static void
2498pipecb (EV_P_ ev_io *iow, int revents)
2499{
2500 int i;
1078 2501
2502 if (revents & EV_READ)
2503 {
1079#if EV_USE_EVENTFD 2504#if EV_USE_EVENTFD
1080 if (evfd >= 0) 2505 if (evpipe [0] < 0)
1081 { 2506 {
1082 uint64_t counter = 1; 2507 uint64_t counter;
1083 write (evfd, &counter, sizeof (uint64_t)); 2508 read (evpipe [1], &counter, sizeof (uint64_t));
1084 } 2509 }
1085 else 2510 else
1086#endif 2511#endif
1087 write (evpipe [1], &old_errno, 1); 2512 {
1088
1089 errno = old_errno;
1090 }
1091}
1092
1093static void
1094pipecb (EV_P_ ev_io *iow, int revents)
1095{
1096#if EV_USE_EVENTFD
1097 if (evfd >= 0)
1098 {
1099 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t));
1101 }
1102 else
1103#endif
1104 {
1105 char dummy; 2513 char dummy[4];
2514#ifdef _WIN32
2515 WSABUF buf;
2516 DWORD recvd;
2517 DWORD flags = 0;
2518 buf.buf = dummy;
2519 buf.len = sizeof (dummy);
2520 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2521#else
1106 read (evpipe [0], &dummy, 1); 2522 read (evpipe [0], &dummy, sizeof (dummy));
2523#endif
2524 }
2525 }
2526
2527 pipe_write_skipped = 0;
2528
2529 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2530
2531#if EV_SIGNAL_ENABLE
2532 if (sig_pending)
1107 } 2533 {
2534 sig_pending = 0;
1108 2535
1109 if (gotsig && ev_is_default_loop (EV_A)) 2536 ECB_MEMORY_FENCE;
1110 {
1111 int signum;
1112 gotsig = 0;
1113 2537
1114 for (signum = signalmax; signum--; ) 2538 for (i = EV_NSIG - 1; i--; )
1115 if (signals [signum].gotsig) 2539 if (expect_false (signals [i].pending))
1116 ev_feed_signal_event (EV_A_ signum + 1); 2540 ev_feed_signal_event (EV_A_ i + 1);
1117 } 2541 }
2542#endif
1118 2543
1119#if EV_ASYNC_ENABLE 2544#if EV_ASYNC_ENABLE
1120 if (gotasync) 2545 if (async_pending)
1121 { 2546 {
1122 int i; 2547 async_pending = 0;
1123 gotasync = 0; 2548
2549 ECB_MEMORY_FENCE;
1124 2550
1125 for (i = asynccnt; i--; ) 2551 for (i = asynccnt; i--; )
1126 if (asyncs [i]->sent) 2552 if (asyncs [i]->sent)
1127 { 2553 {
1128 asyncs [i]->sent = 0; 2554 asyncs [i]->sent = 0;
2555 ECB_MEMORY_FENCE_RELEASE;
1129 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2556 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1130 } 2557 }
1131 } 2558 }
1132#endif 2559#endif
1133} 2560}
1134 2561
1135/*****************************************************************************/ 2562/*****************************************************************************/
1136 2563
2564void
2565ev_feed_signal (int signum) EV_NOEXCEPT
2566{
2567#if EV_MULTIPLICITY
2568 EV_P;
2569 ECB_MEMORY_FENCE_ACQUIRE;
2570 EV_A = signals [signum - 1].loop;
2571
2572 if (!EV_A)
2573 return;
2574#endif
2575
2576 signals [signum - 1].pending = 1;
2577 evpipe_write (EV_A_ &sig_pending);
2578}
2579
1137static void 2580static void
1138ev_sighandler (int signum) 2581ev_sighandler (int signum)
1139{ 2582{
2583#ifdef _WIN32
2584 signal (signum, ev_sighandler);
2585#endif
2586
2587 ev_feed_signal (signum);
2588}
2589
2590noinline
2591void
2592ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2593{
2594 WL w;
2595
2596 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2597 return;
2598
2599 --signum;
2600
1140#if EV_MULTIPLICITY 2601#if EV_MULTIPLICITY
1141 struct ev_loop *loop = &default_loop_struct; 2602 /* it is permissible to try to feed a signal to the wrong loop */
1142#endif 2603 /* or, likely more useful, feeding a signal nobody is waiting for */
1143 2604
1144#if _WIN32 2605 if (expect_false (signals [signum].loop != EV_A))
1145 signal (signum, ev_sighandler);
1146#endif
1147
1148 signals [signum - 1].gotsig = 1;
1149 evpipe_write (EV_A_ &gotsig);
1150}
1151
1152void noinline
1153ev_feed_signal_event (EV_P_ int signum)
1154{
1155 WL w;
1156
1157#if EV_MULTIPLICITY
1158 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1159#endif
1160
1161 --signum;
1162
1163 if (signum < 0 || signum >= signalmax)
1164 return; 2606 return;
2607#endif
1165 2608
1166 signals [signum].gotsig = 0; 2609 signals [signum].pending = 0;
2610 ECB_MEMORY_FENCE_RELEASE;
1167 2611
1168 for (w = signals [signum].head; w; w = w->next) 2612 for (w = signals [signum].head; w; w = w->next)
1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2613 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170} 2614}
1171 2615
2616#if EV_USE_SIGNALFD
2617static void
2618sigfdcb (EV_P_ ev_io *iow, int revents)
2619{
2620 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2621
2622 for (;;)
2623 {
2624 ssize_t res = read (sigfd, si, sizeof (si));
2625
2626 /* not ISO-C, as res might be -1, but works with SuS */
2627 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2628 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2629
2630 if (res < (ssize_t)sizeof (si))
2631 break;
2632 }
2633}
2634#endif
2635
2636#endif
2637
1172/*****************************************************************************/ 2638/*****************************************************************************/
1173 2639
2640#if EV_CHILD_ENABLE
1174static WL childs [EV_PID_HASHSIZE]; 2641static WL childs [EV_PID_HASHSIZE];
1175
1176#ifndef _WIN32
1177 2642
1178static ev_signal childev; 2643static ev_signal childev;
1179 2644
1180#ifndef WIFCONTINUED 2645#ifndef WIFCONTINUED
1181# define WIFCONTINUED(status) 0 2646# define WIFCONTINUED(status) 0
1182#endif 2647#endif
1183 2648
2649/* handle a single child status event */
1184inline_speed void 2650inline_speed void
1185child_reap (EV_P_ int chain, int pid, int status) 2651child_reap (EV_P_ int chain, int pid, int status)
1186{ 2652{
1187 ev_child *w; 2653 ev_child *w;
1188 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2654 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189 2655
1190 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2656 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 { 2657 {
1192 if ((w->pid == pid || !w->pid) 2658 if ((w->pid == pid || !w->pid)
1193 && (!traced || (w->flags & 1))) 2659 && (!traced || (w->flags & 1)))
1194 { 2660 {
1195 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2661 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1202 2668
1203#ifndef WCONTINUED 2669#ifndef WCONTINUED
1204# define WCONTINUED 0 2670# define WCONTINUED 0
1205#endif 2671#endif
1206 2672
2673/* called on sigchld etc., calls waitpid */
1207static void 2674static void
1208childcb (EV_P_ ev_signal *sw, int revents) 2675childcb (EV_P_ ev_signal *sw, int revents)
1209{ 2676{
1210 int pid, status; 2677 int pid, status;
1211 2678
… …
1219 /* make sure we are called again until all children have been reaped */ 2686 /* make sure we are called again until all children have been reaped */
1220 /* we need to do it this way so that the callback gets called before we continue */ 2687 /* we need to do it this way so that the callback gets called before we continue */
1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2688 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1222 2689
1223 child_reap (EV_A_ pid, pid, status); 2690 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1) 2691 if ((EV_PID_HASHSIZE) > 1)
1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2692 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1226} 2693}
1227 2694
1228#endif 2695#endif
1229 2696
1230/*****************************************************************************/ 2697/*****************************************************************************/
1231 2698
2699#if EV_USE_IOCP
2700# include "ev_iocp.c"
2701#endif
1232#if EV_USE_PORT 2702#if EV_USE_PORT
1233# include "ev_port.c" 2703# include "ev_port.c"
1234#endif 2704#endif
1235#if EV_USE_KQUEUE 2705#if EV_USE_KQUEUE
1236# include "ev_kqueue.c" 2706# include "ev_kqueue.c"
… …
1243#endif 2713#endif
1244#if EV_USE_SELECT 2714#if EV_USE_SELECT
1245# include "ev_select.c" 2715# include "ev_select.c"
1246#endif 2716#endif
1247 2717
1248int 2718ecb_cold int
1249ev_version_major (void) 2719ev_version_major (void) EV_NOEXCEPT
1250{ 2720{
1251 return EV_VERSION_MAJOR; 2721 return EV_VERSION_MAJOR;
1252} 2722}
1253 2723
1254int 2724ecb_cold int
1255ev_version_minor (void) 2725ev_version_minor (void) EV_NOEXCEPT
1256{ 2726{
1257 return EV_VERSION_MINOR; 2727 return EV_VERSION_MINOR;
1258} 2728}
1259 2729
1260/* return true if we are running with elevated privileges and should ignore env variables */ 2730/* return true if we are running with elevated privileges and should ignore env variables */
1261int inline_size 2731inline_size ecb_cold int
1262enable_secure (void) 2732enable_secure (void)
1263{ 2733{
1264#ifdef _WIN32 2734#ifdef _WIN32
1265 return 0; 2735 return 0;
1266#else 2736#else
1267 return getuid () != geteuid () 2737 return getuid () != geteuid ()
1268 || getgid () != getegid (); 2738 || getgid () != getegid ();
1269#endif 2739#endif
1270} 2740}
1271 2741
2742ecb_cold
1272unsigned int 2743unsigned int
1273ev_supported_backends (void) 2744ev_supported_backends (void) EV_NOEXCEPT
1274{ 2745{
1275 unsigned int flags = 0; 2746 unsigned int flags = 0;
1276 2747
1277 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2748 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1278 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2749 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1281 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2752 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1282 2753
1283 return flags; 2754 return flags;
1284} 2755}
1285 2756
2757ecb_cold
1286unsigned int 2758unsigned int
1287ev_recommended_backends (void) 2759ev_recommended_backends (void) EV_NOEXCEPT
1288{ 2760{
1289 unsigned int flags = ev_supported_backends (); 2761 unsigned int flags = ev_supported_backends ();
1290 2762
1291#ifndef __NetBSD__ 2763#ifndef __NetBSD__
1292 /* kqueue is borked on everything but netbsd apparently */ 2764 /* kqueue is borked on everything but netbsd apparently */
… …
1296#ifdef __APPLE__ 2768#ifdef __APPLE__
1297 /* only select works correctly on that "unix-certified" platform */ 2769 /* only select works correctly on that "unix-certified" platform */
1298 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2770 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2771 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1300#endif 2772#endif
2773#ifdef __FreeBSD__
2774 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2775#endif
1301 2776
1302 return flags; 2777 return flags;
1303} 2778}
1304 2779
2780ecb_cold
1305unsigned int 2781unsigned int
1306ev_embeddable_backends (void) 2782ev_embeddable_backends (void) EV_NOEXCEPT
1307{ 2783{
1308 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2784 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1309 2785
1310 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2786 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 /* please fix it and tell me how to detect the fix */ 2787 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1312 flags &= ~EVBACKEND_EPOLL; 2788 flags &= ~EVBACKEND_EPOLL;
1313 2789
1314 return flags; 2790 return flags;
1315} 2791}
1316 2792
1317unsigned int 2793unsigned int
1318ev_backend (EV_P) 2794ev_backend (EV_P) EV_NOEXCEPT
1319{ 2795{
1320 return backend; 2796 return backend;
1321} 2797}
1322 2798
2799#if EV_FEATURE_API
1323unsigned int 2800unsigned int
1324ev_loop_count (EV_P) 2801ev_iteration (EV_P) EV_NOEXCEPT
1325{ 2802{
1326 return loop_count; 2803 return loop_count;
1327} 2804}
1328 2805
2806unsigned int
2807ev_depth (EV_P) EV_NOEXCEPT
2808{
2809 return loop_depth;
2810}
2811
1329void 2812void
1330ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2813ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1331{ 2814{
1332 io_blocktime = interval; 2815 io_blocktime = interval;
1333} 2816}
1334 2817
1335void 2818void
1336ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2819ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1337{ 2820{
1338 timeout_blocktime = interval; 2821 timeout_blocktime = interval;
1339} 2822}
1340 2823
1341static void noinline 2824void
2825ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2826{
2827 userdata = data;
2828}
2829
2830void *
2831ev_userdata (EV_P) EV_NOEXCEPT
2832{
2833 return userdata;
2834}
2835
2836void
2837ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2838{
2839 invoke_cb = invoke_pending_cb;
2840}
2841
2842void
2843ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2844{
2845 release_cb = release;
2846 acquire_cb = acquire;
2847}
2848#endif
2849
2850/* initialise a loop structure, must be zero-initialised */
2851noinline ecb_cold
2852static void
1342loop_init (EV_P_ unsigned int flags) 2853loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1343{ 2854{
1344 if (!backend) 2855 if (!backend)
1345 { 2856 {
2857 origflags = flags;
2858
1346#if EV_USE_REALTIME 2859#if EV_USE_REALTIME
1347 if (!have_realtime) 2860 if (!have_realtime)
1348 { 2861 {
1349 struct timespec ts; 2862 struct timespec ts;
1350 2863
… …
1361 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2874 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362 have_monotonic = 1; 2875 have_monotonic = 1;
1363 } 2876 }
1364#endif 2877#endif
1365 2878
1366 ev_rt_now = ev_time ();
1367 mn_now = get_clock ();
1368 now_floor = mn_now;
1369 rtmn_diff = ev_rt_now - mn_now;
1370
1371 io_blocktime = 0.;
1372 timeout_blocktime = 0.;
1373 backend = 0;
1374 backend_fd = -1;
1375 gotasync = 0;
1376#if EV_USE_INOTIFY
1377 fs_fd = -2;
1378#endif
1379
1380 /* pid check not overridable via env */ 2879 /* pid check not overridable via env */
1381#ifndef _WIN32 2880#ifndef _WIN32
1382 if (flags & EVFLAG_FORKCHECK) 2881 if (flags & EVFLAG_FORKCHECK)
1383 curpid = getpid (); 2882 curpid = getpid ();
1384#endif 2883#endif
… …
1386 if (!(flags & EVFLAG_NOENV) 2885 if (!(flags & EVFLAG_NOENV)
1387 && !enable_secure () 2886 && !enable_secure ()
1388 && getenv ("LIBEV_FLAGS")) 2887 && getenv ("LIBEV_FLAGS"))
1389 flags = atoi (getenv ("LIBEV_FLAGS")); 2888 flags = atoi (getenv ("LIBEV_FLAGS"));
1390 2889
1391 if (!(flags & 0x0000ffffU)) 2890 ev_rt_now = ev_time ();
2891 mn_now = get_clock ();
2892 now_floor = mn_now;
2893 rtmn_diff = ev_rt_now - mn_now;
2894#if EV_FEATURE_API
2895 invoke_cb = ev_invoke_pending;
2896#endif
2897
2898 io_blocktime = 0.;
2899 timeout_blocktime = 0.;
2900 backend = 0;
2901 backend_fd = -1;
2902 sig_pending = 0;
2903#if EV_ASYNC_ENABLE
2904 async_pending = 0;
2905#endif
2906 pipe_write_skipped = 0;
2907 pipe_write_wanted = 0;
2908 evpipe [0] = -1;
2909 evpipe [1] = -1;
2910#if EV_USE_INOTIFY
2911 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2912#endif
2913#if EV_USE_SIGNALFD
2914 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2915#endif
2916
2917 if (!(flags & EVBACKEND_MASK))
1392 flags |= ev_recommended_backends (); 2918 flags |= ev_recommended_backends ();
1393 2919
2920#if EV_USE_IOCP
2921 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2922#endif
1394#if EV_USE_PORT 2923#if EV_USE_PORT
1395 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2924 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1396#endif 2925#endif
1397#if EV_USE_KQUEUE 2926#if EV_USE_KQUEUE
1398 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2927 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1405#endif 2934#endif
1406#if EV_USE_SELECT 2935#if EV_USE_SELECT
1407 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2936 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1408#endif 2937#endif
1409 2938
2939 ev_prepare_init (&pending_w, pendingcb);
2940
2941#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1410 ev_init (&pipeev, pipecb); 2942 ev_init (&pipe_w, pipecb);
1411 ev_set_priority (&pipeev, EV_MAXPRI); 2943 ev_set_priority (&pipe_w, EV_MAXPRI);
2944#endif
1412 } 2945 }
1413} 2946}
1414 2947
1415static void noinline 2948/* free up a loop structure */
2949ecb_cold
2950void
1416loop_destroy (EV_P) 2951ev_loop_destroy (EV_P)
1417{ 2952{
1418 int i; 2953 int i;
1419 2954
2955#if EV_MULTIPLICITY
2956 /* mimic free (0) */
2957 if (!EV_A)
2958 return;
2959#endif
2960
2961#if EV_CLEANUP_ENABLE
2962 /* queue cleanup watchers (and execute them) */
2963 if (expect_false (cleanupcnt))
2964 {
2965 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2966 EV_INVOKE_PENDING;
2967 }
2968#endif
2969
2970#if EV_CHILD_ENABLE
2971 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2972 {
2973 ev_ref (EV_A); /* child watcher */
2974 ev_signal_stop (EV_A_ &childev);
2975 }
2976#endif
2977
1420 if (ev_is_active (&pipeev)) 2978 if (ev_is_active (&pipe_w))
1421 { 2979 {
1422 ev_ref (EV_A); /* signal watcher */ 2980 /*ev_ref (EV_A);*/
1423 ev_io_stop (EV_A_ &pipeev); 2981 /*ev_io_stop (EV_A_ &pipe_w);*/
1424 2982
2983 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2984 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2985 }
2986
1425#if EV_USE_EVENTFD 2987#if EV_USE_SIGNALFD
1426 if (evfd >= 0) 2988 if (ev_is_active (&sigfd_w))
1427 close (evfd); 2989 close (sigfd);
1428#endif 2990#endif
1429
1430 if (evpipe [0] >= 0)
1431 {
1432 close (evpipe [0]);
1433 close (evpipe [1]);
1434 }
1435 }
1436 2991
1437#if EV_USE_INOTIFY 2992#if EV_USE_INOTIFY
1438 if (fs_fd >= 0) 2993 if (fs_fd >= 0)
1439 close (fs_fd); 2994 close (fs_fd);
1440#endif 2995#endif
1441 2996
1442 if (backend_fd >= 0) 2997 if (backend_fd >= 0)
1443 close (backend_fd); 2998 close (backend_fd);
1444 2999
3000#if EV_USE_IOCP
3001 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3002#endif
1445#if EV_USE_PORT 3003#if EV_USE_PORT
1446 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3004 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1447#endif 3005#endif
1448#if EV_USE_KQUEUE 3006#if EV_USE_KQUEUE
1449 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3007 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1464#if EV_IDLE_ENABLE 3022#if EV_IDLE_ENABLE
1465 array_free (idle, [i]); 3023 array_free (idle, [i]);
1466#endif 3024#endif
1467 } 3025 }
1468 3026
1469 ev_free (anfds); anfdmax = 0; 3027 ev_free (anfds); anfds = 0; anfdmax = 0;
1470 3028
1471 /* have to use the microsoft-never-gets-it-right macro */ 3029 /* have to use the microsoft-never-gets-it-right macro */
1472 array_free (rfeed, EMPTY); 3030 array_free (rfeed, EMPTY);
1473 array_free (fdchange, EMPTY); 3031 array_free (fdchange, EMPTY);
1474 array_free (timer, EMPTY); 3032 array_free (timer, EMPTY);
… …
1476 array_free (periodic, EMPTY); 3034 array_free (periodic, EMPTY);
1477#endif 3035#endif
1478#if EV_FORK_ENABLE 3036#if EV_FORK_ENABLE
1479 array_free (fork, EMPTY); 3037 array_free (fork, EMPTY);
1480#endif 3038#endif
3039#if EV_CLEANUP_ENABLE
3040 array_free (cleanup, EMPTY);
3041#endif
1481 array_free (prepare, EMPTY); 3042 array_free (prepare, EMPTY);
1482 array_free (check, EMPTY); 3043 array_free (check, EMPTY);
1483#if EV_ASYNC_ENABLE 3044#if EV_ASYNC_ENABLE
1484 array_free (async, EMPTY); 3045 array_free (async, EMPTY);
1485#endif 3046#endif
1486 3047
1487 backend = 0; 3048 backend = 0;
3049
3050#if EV_MULTIPLICITY
3051 if (ev_is_default_loop (EV_A))
3052#endif
3053 ev_default_loop_ptr = 0;
3054#if EV_MULTIPLICITY
3055 else
3056 ev_free (EV_A);
3057#endif
1488} 3058}
1489 3059
1490#if EV_USE_INOTIFY 3060#if EV_USE_INOTIFY
1491inline_size void infy_fork (EV_P); 3061inline_size void infy_fork (EV_P);
1492#endif 3062#endif
… …
1505#endif 3075#endif
1506#if EV_USE_INOTIFY 3076#if EV_USE_INOTIFY
1507 infy_fork (EV_A); 3077 infy_fork (EV_A);
1508#endif 3078#endif
1509 3079
1510 if (ev_is_active (&pipeev)) 3080#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3081 if (ev_is_active (&pipe_w) && postfork != 2)
1511 { 3082 {
1512 /* this "locks" the handlers against writing to the pipe */ 3083 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1513 /* while we modify the fd vars */
1514 gotsig = 1;
1515#if EV_ASYNC_ENABLE
1516 gotasync = 1;
1517#endif
1518 3084
1519 ev_ref (EV_A); 3085 ev_ref (EV_A);
1520 ev_io_stop (EV_A_ &pipeev); 3086 ev_io_stop (EV_A_ &pipe_w);
1521
1522#if EV_USE_EVENTFD
1523 if (evfd >= 0)
1524 close (evfd);
1525#endif
1526 3087
1527 if (evpipe [0] >= 0) 3088 if (evpipe [0] >= 0)
1528 { 3089 EV_WIN32_CLOSE_FD (evpipe [0]);
1529 close (evpipe [0]);
1530 close (evpipe [1]);
1531 }
1532 3090
1533 evpipe_init (EV_A); 3091 evpipe_init (EV_A);
1534 /* now iterate over everything, in case we missed something */ 3092 /* iterate over everything, in case we missed something before */
1535 pipecb (EV_A_ &pipeev, EV_READ); 3093 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1536 } 3094 }
3095#endif
1537 3096
1538 postfork = 0; 3097 postfork = 0;
1539} 3098}
1540 3099
1541#if EV_MULTIPLICITY 3100#if EV_MULTIPLICITY
1542 3101
3102ecb_cold
1543struct ev_loop * 3103struct ev_loop *
1544ev_loop_new (unsigned int flags) 3104ev_loop_new (unsigned int flags) EV_NOEXCEPT
1545{ 3105{
1546 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3106 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547 3107
1548 memset (loop, 0, sizeof (struct ev_loop)); 3108 memset (EV_A, 0, sizeof (struct ev_loop));
1549
1550 loop_init (EV_A_ flags); 3109 loop_init (EV_A_ flags);
1551 3110
1552 if (ev_backend (EV_A)) 3111 if (ev_backend (EV_A))
1553 return loop; 3112 return EV_A;
1554 3113
3114 ev_free (EV_A);
1555 return 0; 3115 return 0;
1556} 3116}
1557 3117
1558void 3118#endif /* multiplicity */
1559ev_loop_destroy (EV_P)
1560{
1561 loop_destroy (EV_A);
1562 ev_free (loop);
1563}
1564
1565void
1566ev_loop_fork (EV_P)
1567{
1568 postfork = 1; /* must be in line with ev_default_fork */
1569}
1570 3119
1571#if EV_VERIFY 3120#if EV_VERIFY
1572static void noinline 3121noinline ecb_cold
3122static void
1573verify_watcher (EV_P_ W w) 3123verify_watcher (EV_P_ W w)
1574{ 3124{
1575 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3125 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576 3126
1577 if (w->pending) 3127 if (w->pending)
1578 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3128 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579} 3129}
1580 3130
1581static void noinline 3131noinline ecb_cold
3132static void
1582verify_heap (EV_P_ ANHE *heap, int N) 3133verify_heap (EV_P_ ANHE *heap, int N)
1583{ 3134{
1584 int i; 3135 int i;
1585 3136
1586 for (i = HEAP0; i < N + HEAP0; ++i) 3137 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1591 3142
1592 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593 } 3144 }
1594} 3145}
1595 3146
1596static void noinline 3147noinline ecb_cold
3148static void
1597array_verify (EV_P_ W *ws, int cnt) 3149array_verify (EV_P_ W *ws, int cnt)
1598{ 3150{
1599 while (cnt--) 3151 while (cnt--)
1600 { 3152 {
1601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3153 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 verify_watcher (EV_A_ ws [cnt]); 3154 verify_watcher (EV_A_ ws [cnt]);
1603 } 3155 }
1604} 3156}
1605#endif 3157#endif
1606 3158
1607void 3159#if EV_FEATURE_API
1608ev_loop_verify (EV_P) 3160void ecb_cold
3161ev_verify (EV_P) EV_NOEXCEPT
1609{ 3162{
1610#if EV_VERIFY 3163#if EV_VERIFY
1611 int i; 3164 int i;
1612 WL w; 3165 WL w, w2;
1613 3166
1614 assert (activecnt >= -1); 3167 assert (activecnt >= -1);
1615 3168
1616 assert (fdchangemax >= fdchangecnt); 3169 assert (fdchangemax >= fdchangecnt);
1617 for (i = 0; i < fdchangecnt; ++i) 3170 for (i = 0; i < fdchangecnt; ++i)
1618 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1619 3172
1620 assert (anfdmax >= 0); 3173 assert (anfdmax >= 0);
1621 for (i = 0; i < anfdmax; ++i) 3174 for (i = 0; i < anfdmax; ++i)
3175 {
3176 int j = 0;
3177
1622 for (w = anfds [i].head; w; w = w->next) 3178 for (w = w2 = anfds [i].head; w; w = w->next)
1623 { 3179 {
1624 verify_watcher (EV_A_ (W)w); 3180 verify_watcher (EV_A_ (W)w);
3181
3182 if (j++ & 1)
3183 {
3184 assert (("libev: io watcher list contains a loop", w != w2));
3185 w2 = w2->next;
3186 }
3187
1625 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3188 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1626 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3189 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1627 } 3190 }
3191 }
1628 3192
1629 assert (timermax >= timercnt); 3193 assert (timermax >= timercnt);
1630 verify_heap (EV_A_ timers, timercnt); 3194 verify_heap (EV_A_ timers, timercnt);
1631 3195
1632#if EV_PERIODIC_ENABLE 3196#if EV_PERIODIC_ENABLE
… …
1647#if EV_FORK_ENABLE 3211#if EV_FORK_ENABLE
1648 assert (forkmax >= forkcnt); 3212 assert (forkmax >= forkcnt);
1649 array_verify (EV_A_ (W *)forks, forkcnt); 3213 array_verify (EV_A_ (W *)forks, forkcnt);
1650#endif 3214#endif
1651 3215
3216#if EV_CLEANUP_ENABLE
3217 assert (cleanupmax >= cleanupcnt);
3218 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3219#endif
3220
1652#if EV_ASYNC_ENABLE 3221#if EV_ASYNC_ENABLE
1653 assert (asyncmax >= asynccnt); 3222 assert (asyncmax >= asynccnt);
1654 array_verify (EV_A_ (W *)asyncs, asynccnt); 3223 array_verify (EV_A_ (W *)asyncs, asynccnt);
1655#endif 3224#endif
1656 3225
3226#if EV_PREPARE_ENABLE
1657 assert (preparemax >= preparecnt); 3227 assert (preparemax >= preparecnt);
1658 array_verify (EV_A_ (W *)prepares, preparecnt); 3228 array_verify (EV_A_ (W *)prepares, preparecnt);
3229#endif
1659 3230
3231#if EV_CHECK_ENABLE
1660 assert (checkmax >= checkcnt); 3232 assert (checkmax >= checkcnt);
1661 array_verify (EV_A_ (W *)checks, checkcnt); 3233 array_verify (EV_A_ (W *)checks, checkcnt);
3234#endif
1662 3235
1663# if 0 3236# if 0
3237#if EV_CHILD_ENABLE
1664 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3238 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1665 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 3239 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3240#endif
1666# endif 3241# endif
1667#endif 3242#endif
1668} 3243}
1669 3244#endif
1670#endif /* multiplicity */
1671 3245
1672#if EV_MULTIPLICITY 3246#if EV_MULTIPLICITY
3247ecb_cold
1673struct ev_loop * 3248struct ev_loop *
1674ev_default_loop_init (unsigned int flags)
1675#else 3249#else
1676int 3250int
3251#endif
1677ev_default_loop (unsigned int flags) 3252ev_default_loop (unsigned int flags) EV_NOEXCEPT
1678#endif
1679{ 3253{
1680 if (!ev_default_loop_ptr) 3254 if (!ev_default_loop_ptr)
1681 { 3255 {
1682#if EV_MULTIPLICITY 3256#if EV_MULTIPLICITY
1683 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3257 EV_P = ev_default_loop_ptr = &default_loop_struct;
1684#else 3258#else
1685 ev_default_loop_ptr = 1; 3259 ev_default_loop_ptr = 1;
1686#endif 3260#endif
1687 3261
1688 loop_init (EV_A_ flags); 3262 loop_init (EV_A_ flags);
1689 3263
1690 if (ev_backend (EV_A)) 3264 if (ev_backend (EV_A))
1691 { 3265 {
1692#ifndef _WIN32 3266#if EV_CHILD_ENABLE
1693 ev_signal_init (&childev, childcb, SIGCHLD); 3267 ev_signal_init (&childev, childcb, SIGCHLD);
1694 ev_set_priority (&childev, EV_MAXPRI); 3268 ev_set_priority (&childev, EV_MAXPRI);
1695 ev_signal_start (EV_A_ &childev); 3269 ev_signal_start (EV_A_ &childev);
1696 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3270 ev_unref (EV_A); /* child watcher should not keep loop alive */
1697#endif 3271#endif
… …
1702 3276
1703 return ev_default_loop_ptr; 3277 return ev_default_loop_ptr;
1704} 3278}
1705 3279
1706void 3280void
1707ev_default_destroy (void) 3281ev_loop_fork (EV_P) EV_NOEXCEPT
1708{ 3282{
1709#if EV_MULTIPLICITY 3283 postfork = 1;
1710 struct ev_loop *loop = ev_default_loop_ptr;
1711#endif
1712
1713 ev_default_loop_ptr = 0;
1714
1715#ifndef _WIN32
1716 ev_ref (EV_A); /* child watcher */
1717 ev_signal_stop (EV_A_ &childev);
1718#endif
1719
1720 loop_destroy (EV_A);
1721}
1722
1723void
1724ev_default_fork (void)
1725{
1726#if EV_MULTIPLICITY
1727 struct ev_loop *loop = ev_default_loop_ptr;
1728#endif
1729
1730 postfork = 1; /* must be in line with ev_loop_fork */
1731} 3284}
1732 3285
1733/*****************************************************************************/ 3286/*****************************************************************************/
1734 3287
1735void 3288void
1736ev_invoke (EV_P_ void *w, int revents) 3289ev_invoke (EV_P_ void *w, int revents)
1737{ 3290{
1738 EV_CB_INVOKE ((W)w, revents); 3291 EV_CB_INVOKE ((W)w, revents);
1739} 3292}
1740 3293
1741inline_speed void 3294unsigned int
1742call_pending (EV_P) 3295ev_pending_count (EV_P) EV_NOEXCEPT
1743{ 3296{
1744 int pri; 3297 int pri;
3298 unsigned int count = 0;
1745 3299
1746 for (pri = NUMPRI; pri--; ) 3300 for (pri = NUMPRI; pri--; )
3301 count += pendingcnt [pri];
3302
3303 return count;
3304}
3305
3306noinline
3307void
3308ev_invoke_pending (EV_P)
3309{
3310 pendingpri = NUMPRI;
3311
3312 do
3313 {
3314 --pendingpri;
3315
3316 /* pendingpri possibly gets modified in the inner loop */
1747 while (pendingcnt [pri]) 3317 while (pendingcnt [pendingpri])
1748 {
1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1750
1751 if (expect_true (p->w))
1752 { 3318 {
1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ 3319 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1754 3320
1755 p->w->pending = 0; 3321 p->w->pending = 0;
1756 EV_CB_INVOKE (p->w, p->events); 3322 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK; 3323 EV_FREQUENT_CHECK;
1758 } 3324 }
1759 } 3325 }
3326 while (pendingpri);
1760} 3327}
1761 3328
1762#if EV_IDLE_ENABLE 3329#if EV_IDLE_ENABLE
3330/* make idle watchers pending. this handles the "call-idle */
3331/* only when higher priorities are idle" logic */
1763inline_size void 3332inline_size void
1764idle_reify (EV_P) 3333idle_reify (EV_P)
1765{ 3334{
1766 if (expect_false (idleall)) 3335 if (expect_false (idleall))
1767 { 3336 {
… …
1780 } 3349 }
1781 } 3350 }
1782} 3351}
1783#endif 3352#endif
1784 3353
3354/* make timers pending */
1785inline_size void 3355inline_size void
1786timers_reify (EV_P) 3356timers_reify (EV_P)
1787{ 3357{
1788 EV_FREQUENT_CHECK; 3358 EV_FREQUENT_CHECK;
1789 3359
… …
1813 EV_FREQUENT_CHECK; 3383 EV_FREQUENT_CHECK;
1814 feed_reverse (EV_A_ (W)w); 3384 feed_reverse (EV_A_ (W)w);
1815 } 3385 }
1816 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3386 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1817 3387
1818 feed_reverse_done (EV_A_ EV_TIMEOUT); 3388 feed_reverse_done (EV_A_ EV_TIMER);
1819 } 3389 }
1820} 3390}
1821 3391
1822#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
3393
3394noinline
3395static void
3396periodic_recalc (EV_P_ ev_periodic *w)
3397{
3398 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3399 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3400
3401 /* the above almost always errs on the low side */
3402 while (at <= ev_rt_now)
3403 {
3404 ev_tstamp nat = at + w->interval;
3405
3406 /* when resolution fails us, we use ev_rt_now */
3407 if (expect_false (nat == at))
3408 {
3409 at = ev_rt_now;
3410 break;
3411 }
3412
3413 at = nat;
3414 }
3415
3416 ev_at (w) = at;
3417}
3418
3419/* make periodics pending */
1823inline_size void 3420inline_size void
1824periodics_reify (EV_P) 3421periodics_reify (EV_P)
1825{ 3422{
1826 EV_FREQUENT_CHECK; 3423 EV_FREQUENT_CHECK;
1827 3424
1828 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3425 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1829 { 3426 {
1830 int feed_count = 0;
1831
1832 do 3427 do
1833 { 3428 {
1834 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3429 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1835 3430
1836 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3431 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1845 ANHE_at_cache (periodics [HEAP0]); 3440 ANHE_at_cache (periodics [HEAP0]);
1846 downheap (periodics, periodiccnt, HEAP0); 3441 downheap (periodics, periodiccnt, HEAP0);
1847 } 3442 }
1848 else if (w->interval) 3443 else if (w->interval)
1849 { 3444 {
1850 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3445 periodic_recalc (EV_A_ w);
1851 /* if next trigger time is not sufficiently in the future, put it there */
1852 /* this might happen because of floating point inexactness */
1853 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854 {
1855 ev_at (w) += w->interval;
1856
1857 /* if interval is unreasonably low we might still have a time in the past */
1858 /* so correct this. this will make the periodic very inexact, but the user */
1859 /* has effectively asked to get triggered more often than possible */
1860 if (ev_at (w) < ev_rt_now)
1861 ev_at (w) = ev_rt_now;
1862 }
1863
1864 ANHE_at_cache (periodics [HEAP0]); 3446 ANHE_at_cache (periodics [HEAP0]);
1865 downheap (periodics, periodiccnt, HEAP0); 3447 downheap (periodics, periodiccnt, HEAP0);
1866 } 3448 }
1867 else 3449 else
1868 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3450 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1874 3456
1875 feed_reverse_done (EV_A_ EV_PERIODIC); 3457 feed_reverse_done (EV_A_ EV_PERIODIC);
1876 } 3458 }
1877} 3459}
1878 3460
1879static void noinline 3461/* simply recalculate all periodics */
3462/* TODO: maybe ensure that at least one event happens when jumping forward? */
3463noinline ecb_cold
3464static void
1880periodics_reschedule (EV_P) 3465periodics_reschedule (EV_P)
1881{ 3466{
1882 int i; 3467 int i;
1883 3468
1884 /* adjust periodics after time jump */ 3469 /* adjust periodics after time jump */
… …
1887 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3472 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1888 3473
1889 if (w->reschedule_cb) 3474 if (w->reschedule_cb)
1890 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3475 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1891 else if (w->interval) 3476 else if (w->interval)
1892 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3477 periodic_recalc (EV_A_ w);
1893 3478
1894 ANHE_at_cache (periodics [i]); 3479 ANHE_at_cache (periodics [i]);
1895 } 3480 }
1896 3481
1897 reheap (periodics, periodiccnt); 3482 reheap (periodics, periodiccnt);
1898} 3483}
1899#endif 3484#endif
1900 3485
1901static void noinline 3486/* adjust all timers by a given offset */
3487noinline ecb_cold
3488static void
1902timers_reschedule (EV_P_ ev_tstamp adjust) 3489timers_reschedule (EV_P_ ev_tstamp adjust)
1903{ 3490{
1904 int i; 3491 int i;
1905 3492
1906 for (i = 0; i < timercnt; ++i) 3493 for (i = 0; i < timercnt; ++i)
… …
1909 ANHE_w (*he)->at += adjust; 3496 ANHE_w (*he)->at += adjust;
1910 ANHE_at_cache (*he); 3497 ANHE_at_cache (*he);
1911 } 3498 }
1912} 3499}
1913 3500
3501/* fetch new monotonic and realtime times from the kernel */
3502/* also detect if there was a timejump, and act accordingly */
1914inline_speed void 3503inline_speed void
1915time_update (EV_P_ ev_tstamp max_block) 3504time_update (EV_P_ ev_tstamp max_block)
1916{ 3505{
1917 int i;
1918
1919#if EV_USE_MONOTONIC 3506#if EV_USE_MONOTONIC
1920 if (expect_true (have_monotonic)) 3507 if (expect_true (have_monotonic))
1921 { 3508 {
3509 int i;
1922 ev_tstamp odiff = rtmn_diff; 3510 ev_tstamp odiff = rtmn_diff;
1923 3511
1924 mn_now = get_clock (); 3512 mn_now = get_clock ();
1925 3513
1926 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3514 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1942 * doesn't hurt either as we only do this on time-jumps or 3530 * doesn't hurt either as we only do this on time-jumps or
1943 * in the unlikely event of having been preempted here. 3531 * in the unlikely event of having been preempted here.
1944 */ 3532 */
1945 for (i = 4; --i; ) 3533 for (i = 4; --i; )
1946 { 3534 {
3535 ev_tstamp diff;
1947 rtmn_diff = ev_rt_now - mn_now; 3536 rtmn_diff = ev_rt_now - mn_now;
1948 3537
3538 diff = odiff - rtmn_diff;
3539
1949 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3540 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1950 return; /* all is well */ 3541 return; /* all is well */
1951 3542
1952 ev_rt_now = ev_time (); 3543 ev_rt_now = ev_time ();
1953 mn_now = get_clock (); 3544 mn_now = get_clock ();
1954 now_floor = mn_now; 3545 now_floor = mn_now;
… …
1976 3567
1977 mn_now = ev_rt_now; 3568 mn_now = ev_rt_now;
1978 } 3569 }
1979} 3570}
1980 3571
1981static int loop_done; 3572int
1982
1983void
1984ev_loop (EV_P_ int flags) 3573ev_run (EV_P_ int flags)
1985{ 3574{
3575#if EV_FEATURE_API
3576 ++loop_depth;
3577#endif
3578
3579 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3580
1986 loop_done = EVUNLOOP_CANCEL; 3581 loop_done = EVBREAK_CANCEL;
1987 3582
1988 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3583 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1989 3584
1990 do 3585 do
1991 { 3586 {
1992#if EV_VERIFY >= 2 3587#if EV_VERIFY >= 2
1993 ev_loop_verify (EV_A); 3588 ev_verify (EV_A);
1994#endif 3589#endif
1995 3590
1996#ifndef _WIN32 3591#ifndef _WIN32
1997 if (expect_false (curpid)) /* penalise the forking check even more */ 3592 if (expect_false (curpid)) /* penalise the forking check even more */
1998 if (expect_false (getpid () != curpid)) 3593 if (expect_false (getpid () != curpid))
… …
2006 /* we might have forked, so queue fork handlers */ 3601 /* we might have forked, so queue fork handlers */
2007 if (expect_false (postfork)) 3602 if (expect_false (postfork))
2008 if (forkcnt) 3603 if (forkcnt)
2009 { 3604 {
2010 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3605 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2011 call_pending (EV_A); 3606 EV_INVOKE_PENDING;
2012 } 3607 }
2013#endif 3608#endif
2014 3609
3610#if EV_PREPARE_ENABLE
2015 /* queue prepare watchers (and execute them) */ 3611 /* queue prepare watchers (and execute them) */
2016 if (expect_false (preparecnt)) 3612 if (expect_false (preparecnt))
2017 { 3613 {
2018 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3614 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2019 call_pending (EV_A); 3615 EV_INVOKE_PENDING;
2020 } 3616 }
3617#endif
3618
3619 if (expect_false (loop_done))
3620 break;
2021 3621
2022 /* we might have forked, so reify kernel state if necessary */ 3622 /* we might have forked, so reify kernel state if necessary */
2023 if (expect_false (postfork)) 3623 if (expect_false (postfork))
2024 loop_fork (EV_A); 3624 loop_fork (EV_A);
2025 3625
… …
2029 /* calculate blocking time */ 3629 /* calculate blocking time */
2030 { 3630 {
2031 ev_tstamp waittime = 0.; 3631 ev_tstamp waittime = 0.;
2032 ev_tstamp sleeptime = 0.; 3632 ev_tstamp sleeptime = 0.;
2033 3633
3634 /* remember old timestamp for io_blocktime calculation */
3635 ev_tstamp prev_mn_now = mn_now;
3636
3637 /* update time to cancel out callback processing overhead */
3638 time_update (EV_A_ 1e100);
3639
3640 /* from now on, we want a pipe-wake-up */
3641 pipe_write_wanted = 1;
3642
3643 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3644
2034 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3645 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2035 { 3646 {
2036 /* update time to cancel out callback processing overhead */ 3647 waittime = MAX_BLOCKTIME;
2037 time_update (EV_A_ 1e100);
2038 3648
2039 if (timercnt) 3649 if (timercnt)
2040 { 3650 {
2041 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3651 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2042 if (waittime > to) waittime = to; 3652 if (waittime > to) waittime = to;
2043 } 3653 }
2044 3654
2045#if EV_PERIODIC_ENABLE 3655#if EV_PERIODIC_ENABLE
2046 if (periodiccnt) 3656 if (periodiccnt)
2047 { 3657 {
2048 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3658 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2049 if (waittime > to) waittime = to; 3659 if (waittime > to) waittime = to;
2050 } 3660 }
2051#endif 3661#endif
2052 3662
3663 /* don't let timeouts decrease the waittime below timeout_blocktime */
2053 if (expect_false (waittime < timeout_blocktime)) 3664 if (expect_false (waittime < timeout_blocktime))
2054 waittime = timeout_blocktime; 3665 waittime = timeout_blocktime;
2055 3666
2056 sleeptime = waittime - backend_fudge; 3667 /* at this point, we NEED to wait, so we have to ensure */
3668 /* to pass a minimum nonzero value to the backend */
3669 if (expect_false (waittime < backend_mintime))
3670 waittime = backend_mintime;
2057 3671
3672 /* extra check because io_blocktime is commonly 0 */
2058 if (expect_true (sleeptime > io_blocktime)) 3673 if (expect_false (io_blocktime))
2059 sleeptime = io_blocktime;
2060
2061 if (sleeptime)
2062 { 3674 {
3675 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3676
3677 if (sleeptime > waittime - backend_mintime)
3678 sleeptime = waittime - backend_mintime;
3679
3680 if (expect_true (sleeptime > 0.))
3681 {
2063 ev_sleep (sleeptime); 3682 ev_sleep (sleeptime);
2064 waittime -= sleeptime; 3683 waittime -= sleeptime;
3684 }
2065 } 3685 }
2066 } 3686 }
2067 3687
3688#if EV_FEATURE_API
2068 ++loop_count; 3689 ++loop_count;
3690#endif
3691 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2069 backend_poll (EV_A_ waittime); 3692 backend_poll (EV_A_ waittime);
3693 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3694
3695 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3696
3697 ECB_MEMORY_FENCE_ACQUIRE;
3698 if (pipe_write_skipped)
3699 {
3700 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3701 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3702 }
3703
2070 3704
2071 /* update ev_rt_now, do magic */ 3705 /* update ev_rt_now, do magic */
2072 time_update (EV_A_ waittime + sleeptime); 3706 time_update (EV_A_ waittime + sleeptime);
2073 } 3707 }
2074 3708
… …
2081#if EV_IDLE_ENABLE 3715#if EV_IDLE_ENABLE
2082 /* queue idle watchers unless other events are pending */ 3716 /* queue idle watchers unless other events are pending */
2083 idle_reify (EV_A); 3717 idle_reify (EV_A);
2084#endif 3718#endif
2085 3719
3720#if EV_CHECK_ENABLE
2086 /* queue check watchers, to be executed first */ 3721 /* queue check watchers, to be executed first */
2087 if (expect_false (checkcnt)) 3722 if (expect_false (checkcnt))
2088 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3723 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3724#endif
2089 3725
2090 call_pending (EV_A); 3726 EV_INVOKE_PENDING;
2091 } 3727 }
2092 while (expect_true ( 3728 while (expect_true (
2093 activecnt 3729 activecnt
2094 && !loop_done 3730 && !loop_done
2095 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3731 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2096 )); 3732 ));
2097 3733
2098 if (loop_done == EVUNLOOP_ONE) 3734 if (loop_done == EVBREAK_ONE)
2099 loop_done = EVUNLOOP_CANCEL; 3735 loop_done = EVBREAK_CANCEL;
2100}
2101 3736
3737#if EV_FEATURE_API
3738 --loop_depth;
3739#endif
3740
3741 return activecnt;
3742}
3743
2102void 3744void
2103ev_unloop (EV_P_ int how) 3745ev_break (EV_P_ int how) EV_NOEXCEPT
2104{ 3746{
2105 loop_done = how; 3747 loop_done = how;
2106} 3748}
2107 3749
2108void 3750void
2109ev_ref (EV_P) 3751ev_ref (EV_P) EV_NOEXCEPT
2110{ 3752{
2111 ++activecnt; 3753 ++activecnt;
2112} 3754}
2113 3755
2114void 3756void
2115ev_unref (EV_P) 3757ev_unref (EV_P) EV_NOEXCEPT
2116{ 3758{
2117 --activecnt; 3759 --activecnt;
2118} 3760}
2119 3761
2120void 3762void
2121ev_now_update (EV_P) 3763ev_now_update (EV_P) EV_NOEXCEPT
2122{ 3764{
2123 time_update (EV_A_ 1e100); 3765 time_update (EV_A_ 1e100);
2124} 3766}
2125 3767
2126void 3768void
2127ev_suspend (EV_P) 3769ev_suspend (EV_P) EV_NOEXCEPT
2128{ 3770{
2129 ev_now_update (EV_A); 3771 ev_now_update (EV_A);
2130} 3772}
2131 3773
2132void 3774void
2133ev_resume (EV_P) 3775ev_resume (EV_P) EV_NOEXCEPT
2134{ 3776{
2135 ev_tstamp mn_prev = mn_now; 3777 ev_tstamp mn_prev = mn_now;
2136 3778
2137 ev_now_update (EV_A); 3779 ev_now_update (EV_A);
2138 printf ("update %f\n", mn_now - mn_prev);//D
2139 timers_reschedule (EV_A_ mn_now - mn_prev); 3780 timers_reschedule (EV_A_ mn_now - mn_prev);
3781#if EV_PERIODIC_ENABLE
3782 /* TODO: really do this? */
2140 periodics_reschedule (EV_A); 3783 periodics_reschedule (EV_A);
3784#endif
2141} 3785}
2142 3786
2143/*****************************************************************************/ 3787/*****************************************************************************/
3788/* singly-linked list management, used when the expected list length is short */
2144 3789
2145inline_size void 3790inline_size void
2146wlist_add (WL *head, WL elem) 3791wlist_add (WL *head, WL elem)
2147{ 3792{
2148 elem->next = *head; 3793 elem->next = *head;
… …
2152inline_size void 3797inline_size void
2153wlist_del (WL *head, WL elem) 3798wlist_del (WL *head, WL elem)
2154{ 3799{
2155 while (*head) 3800 while (*head)
2156 { 3801 {
2157 if (*head == elem) 3802 if (expect_true (*head == elem))
2158 { 3803 {
2159 *head = elem->next; 3804 *head = elem->next;
2160 return; 3805 break;
2161 } 3806 }
2162 3807
2163 head = &(*head)->next; 3808 head = &(*head)->next;
2164 } 3809 }
2165} 3810}
2166 3811
3812/* internal, faster, version of ev_clear_pending */
2167inline_speed void 3813inline_speed void
2168clear_pending (EV_P_ W w) 3814clear_pending (EV_P_ W w)
2169{ 3815{
2170 if (w->pending) 3816 if (w->pending)
2171 { 3817 {
2172 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3818 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2173 w->pending = 0; 3819 w->pending = 0;
2174 } 3820 }
2175} 3821}
2176 3822
2177int 3823int
2178ev_clear_pending (EV_P_ void *w) 3824ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2179{ 3825{
2180 W w_ = (W)w; 3826 W w_ = (W)w;
2181 int pending = w_->pending; 3827 int pending = w_->pending;
2182 3828
2183 if (expect_true (pending)) 3829 if (expect_true (pending))
2184 { 3830 {
2185 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3831 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3832 p->w = (W)&pending_w;
2186 w_->pending = 0; 3833 w_->pending = 0;
2187 p->w = 0;
2188 return p->events; 3834 return p->events;
2189 } 3835 }
2190 else 3836 else
2191 return 0; 3837 return 0;
2192} 3838}
2193 3839
2194inline_size void 3840inline_size void
2195pri_adjust (EV_P_ W w) 3841pri_adjust (EV_P_ W w)
2196{ 3842{
2197 int pri = w->priority; 3843 int pri = ev_priority (w);
2198 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3844 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2199 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3845 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2200 w->priority = pri; 3846 ev_set_priority (w, pri);
2201} 3847}
2202 3848
2203inline_speed void 3849inline_speed void
2204ev_start (EV_P_ W w, int active) 3850ev_start (EV_P_ W w, int active)
2205{ 3851{
… …
2215 w->active = 0; 3861 w->active = 0;
2216} 3862}
2217 3863
2218/*****************************************************************************/ 3864/*****************************************************************************/
2219 3865
2220void noinline 3866noinline
3867void
2221ev_io_start (EV_P_ ev_io *w) 3868ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2222{ 3869{
2223 int fd = w->fd; 3870 int fd = w->fd;
2224 3871
2225 if (expect_false (ev_is_active (w))) 3872 if (expect_false (ev_is_active (w)))
2226 return; 3873 return;
2227 3874
2228 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 3875 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2229 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3876 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2230 3877
2231 EV_FREQUENT_CHECK; 3878 EV_FREQUENT_CHECK;
2232 3879
2233 ev_start (EV_A_ (W)w, 1); 3880 ev_start (EV_A_ (W)w, 1);
2234 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3881 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2235 wlist_add (&anfds[fd].head, (WL)w); 3882 wlist_add (&anfds[fd].head, (WL)w);
2236 3883
3884 /* common bug, apparently */
3885 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3886
2237 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1); 3887 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2238 w->events &= ~EV__IOFDSET; 3888 w->events &= ~EV__IOFDSET;
2239 3889
2240 EV_FREQUENT_CHECK; 3890 EV_FREQUENT_CHECK;
2241} 3891}
2242 3892
2243void noinline 3893noinline
3894void
2244ev_io_stop (EV_P_ ev_io *w) 3895ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2245{ 3896{
2246 clear_pending (EV_A_ (W)w); 3897 clear_pending (EV_A_ (W)w);
2247 if (expect_false (!ev_is_active (w))) 3898 if (expect_false (!ev_is_active (w)))
2248 return; 3899 return;
2249 3900
… …
2252 EV_FREQUENT_CHECK; 3903 EV_FREQUENT_CHECK;
2253 3904
2254 wlist_del (&anfds[w->fd].head, (WL)w); 3905 wlist_del (&anfds[w->fd].head, (WL)w);
2255 ev_stop (EV_A_ (W)w); 3906 ev_stop (EV_A_ (W)w);
2256 3907
2257 fd_change (EV_A_ w->fd, 1); 3908 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2258 3909
2259 EV_FREQUENT_CHECK; 3910 EV_FREQUENT_CHECK;
2260} 3911}
2261 3912
2262void noinline 3913noinline
3914void
2263ev_timer_start (EV_P_ ev_timer *w) 3915ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2264{ 3916{
2265 if (expect_false (ev_is_active (w))) 3917 if (expect_false (ev_is_active (w)))
2266 return; 3918 return;
2267 3919
2268 ev_at (w) += mn_now; 3920 ev_at (w) += mn_now;
… …
2281 EV_FREQUENT_CHECK; 3933 EV_FREQUENT_CHECK;
2282 3934
2283 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3935 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2284} 3936}
2285 3937
2286void noinline 3938noinline
3939void
2287ev_timer_stop (EV_P_ ev_timer *w) 3940ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2288{ 3941{
2289 clear_pending (EV_A_ (W)w); 3942 clear_pending (EV_A_ (W)w);
2290 if (expect_false (!ev_is_active (w))) 3943 if (expect_false (!ev_is_active (w)))
2291 return; 3944 return;
2292 3945
… …
2304 timers [active] = timers [timercnt + HEAP0]; 3957 timers [active] = timers [timercnt + HEAP0];
2305 adjustheap (timers, timercnt, active); 3958 adjustheap (timers, timercnt, active);
2306 } 3959 }
2307 } 3960 }
2308 3961
2309 EV_FREQUENT_CHECK;
2310
2311 ev_at (w) -= mn_now; 3962 ev_at (w) -= mn_now;
2312 3963
2313 ev_stop (EV_A_ (W)w); 3964 ev_stop (EV_A_ (W)w);
2314}
2315 3965
3966 EV_FREQUENT_CHECK;
3967}
3968
2316void noinline 3969noinline
3970void
2317ev_timer_again (EV_P_ ev_timer *w) 3971ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2318{ 3972{
2319 EV_FREQUENT_CHECK; 3973 EV_FREQUENT_CHECK;
3974
3975 clear_pending (EV_A_ (W)w);
2320 3976
2321 if (ev_is_active (w)) 3977 if (ev_is_active (w))
2322 { 3978 {
2323 if (w->repeat) 3979 if (w->repeat)
2324 { 3980 {
… …
2336 } 3992 }
2337 3993
2338 EV_FREQUENT_CHECK; 3994 EV_FREQUENT_CHECK;
2339} 3995}
2340 3996
3997ev_tstamp
3998ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
3999{
4000 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
4001}
4002
2341#if EV_PERIODIC_ENABLE 4003#if EV_PERIODIC_ENABLE
2342void noinline 4004noinline
4005void
2343ev_periodic_start (EV_P_ ev_periodic *w) 4006ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2344{ 4007{
2345 if (expect_false (ev_is_active (w))) 4008 if (expect_false (ev_is_active (w)))
2346 return; 4009 return;
2347 4010
2348 if (w->reschedule_cb) 4011 if (w->reschedule_cb)
2349 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4012 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2350 else if (w->interval) 4013 else if (w->interval)
2351 { 4014 {
2352 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4015 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2353 /* this formula differs from the one in periodic_reify because we do not always round up */ 4016 periodic_recalc (EV_A_ w);
2354 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2355 } 4017 }
2356 else 4018 else
2357 ev_at (w) = w->offset; 4019 ev_at (w) = w->offset;
2358 4020
2359 EV_FREQUENT_CHECK; 4021 EV_FREQUENT_CHECK;
… …
2368 EV_FREQUENT_CHECK; 4030 EV_FREQUENT_CHECK;
2369 4031
2370 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4032 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2371} 4033}
2372 4034
2373void noinline 4035noinline
4036void
2374ev_periodic_stop (EV_P_ ev_periodic *w) 4037ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2375{ 4038{
2376 clear_pending (EV_A_ (W)w); 4039 clear_pending (EV_A_ (W)w);
2377 if (expect_false (!ev_is_active (w))) 4040 if (expect_false (!ev_is_active (w)))
2378 return; 4041 return;
2379 4042
… …
2391 periodics [active] = periodics [periodiccnt + HEAP0]; 4054 periodics [active] = periodics [periodiccnt + HEAP0];
2392 adjustheap (periodics, periodiccnt, active); 4055 adjustheap (periodics, periodiccnt, active);
2393 } 4056 }
2394 } 4057 }
2395 4058
2396 EV_FREQUENT_CHECK;
2397
2398 ev_stop (EV_A_ (W)w); 4059 ev_stop (EV_A_ (W)w);
2399}
2400 4060
4061 EV_FREQUENT_CHECK;
4062}
4063
2401void noinline 4064noinline
4065void
2402ev_periodic_again (EV_P_ ev_periodic *w) 4066ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2403{ 4067{
2404 /* TODO: use adjustheap and recalculation */ 4068 /* TODO: use adjustheap and recalculation */
2405 ev_periodic_stop (EV_A_ w); 4069 ev_periodic_stop (EV_A_ w);
2406 ev_periodic_start (EV_A_ w); 4070 ev_periodic_start (EV_A_ w);
2407} 4071}
… …
2409 4073
2410#ifndef SA_RESTART 4074#ifndef SA_RESTART
2411# define SA_RESTART 0 4075# define SA_RESTART 0
2412#endif 4076#endif
2413 4077
4078#if EV_SIGNAL_ENABLE
4079
2414void noinline 4080noinline
4081void
2415ev_signal_start (EV_P_ ev_signal *w) 4082ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2416{ 4083{
2417#if EV_MULTIPLICITY
2418 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2419#endif
2420 if (expect_false (ev_is_active (w))) 4084 if (expect_false (ev_is_active (w)))
2421 return; 4085 return;
2422 4086
2423 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 4087 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2424 4088
2425 evpipe_init (EV_A); 4089#if EV_MULTIPLICITY
4090 assert (("libev: a signal must not be attached to two different loops",
4091 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2426 4092
2427 EV_FREQUENT_CHECK; 4093 signals [w->signum - 1].loop = EV_A;
4094 ECB_MEMORY_FENCE_RELEASE;
4095#endif
2428 4096
4097 EV_FREQUENT_CHECK;
4098
4099#if EV_USE_SIGNALFD
4100 if (sigfd == -2)
2429 { 4101 {
2430#ifndef _WIN32 4102 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2431 sigset_t full, prev; 4103 if (sigfd < 0 && errno == EINVAL)
2432 sigfillset (&full); 4104 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2433 sigprocmask (SIG_SETMASK, &full, &prev);
2434#endif
2435 4105
2436 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 4106 if (sigfd >= 0)
4107 {
4108 fd_intern (sigfd); /* doing it twice will not hurt */
2437 4109
2438#ifndef _WIN32 4110 sigemptyset (&sigfd_set);
2439 sigprocmask (SIG_SETMASK, &prev, 0); 4111
2440#endif 4112 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4113 ev_set_priority (&sigfd_w, EV_MAXPRI);
4114 ev_io_start (EV_A_ &sigfd_w);
4115 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4116 }
2441 } 4117 }
4118
4119 if (sigfd >= 0)
4120 {
4121 /* TODO: check .head */
4122 sigaddset (&sigfd_set, w->signum);
4123 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4124
4125 signalfd (sigfd, &sigfd_set, 0);
4126 }
4127#endif
2442 4128
2443 ev_start (EV_A_ (W)w, 1); 4129 ev_start (EV_A_ (W)w, 1);
2444 wlist_add (&signals [w->signum - 1].head, (WL)w); 4130 wlist_add (&signals [w->signum - 1].head, (WL)w);
2445 4131
2446 if (!((WL)w)->next) 4132 if (!((WL)w)->next)
4133# if EV_USE_SIGNALFD
4134 if (sigfd < 0) /*TODO*/
4135# endif
2447 { 4136 {
2448#if _WIN32 4137# ifdef _WIN32
4138 evpipe_init (EV_A);
4139
2449 signal (w->signum, ev_sighandler); 4140 signal (w->signum, ev_sighandler);
2450#else 4141# else
2451 struct sigaction sa; 4142 struct sigaction sa;
4143
4144 evpipe_init (EV_A);
4145
2452 sa.sa_handler = ev_sighandler; 4146 sa.sa_handler = ev_sighandler;
2453 sigfillset (&sa.sa_mask); 4147 sigfillset (&sa.sa_mask);
2454 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4148 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2455 sigaction (w->signum, &sa, 0); 4149 sigaction (w->signum, &sa, 0);
4150
4151 if (origflags & EVFLAG_NOSIGMASK)
4152 {
4153 sigemptyset (&sa.sa_mask);
4154 sigaddset (&sa.sa_mask, w->signum);
4155 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4156 }
2456#endif 4157#endif
2457 } 4158 }
2458 4159
2459 EV_FREQUENT_CHECK; 4160 EV_FREQUENT_CHECK;
2460} 4161}
2461 4162
2462void noinline 4163noinline
4164void
2463ev_signal_stop (EV_P_ ev_signal *w) 4165ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2464{ 4166{
2465 clear_pending (EV_A_ (W)w); 4167 clear_pending (EV_A_ (W)w);
2466 if (expect_false (!ev_is_active (w))) 4168 if (expect_false (!ev_is_active (w)))
2467 return; 4169 return;
2468 4170
… …
2470 4172
2471 wlist_del (&signals [w->signum - 1].head, (WL)w); 4173 wlist_del (&signals [w->signum - 1].head, (WL)w);
2472 ev_stop (EV_A_ (W)w); 4174 ev_stop (EV_A_ (W)w);
2473 4175
2474 if (!signals [w->signum - 1].head) 4176 if (!signals [w->signum - 1].head)
4177 {
4178#if EV_MULTIPLICITY
4179 signals [w->signum - 1].loop = 0; /* unattach from signal */
4180#endif
4181#if EV_USE_SIGNALFD
4182 if (sigfd >= 0)
4183 {
4184 sigset_t ss;
4185
4186 sigemptyset (&ss);
4187 sigaddset (&ss, w->signum);
4188 sigdelset (&sigfd_set, w->signum);
4189
4190 signalfd (sigfd, &sigfd_set, 0);
4191 sigprocmask (SIG_UNBLOCK, &ss, 0);
4192 }
4193 else
4194#endif
2475 signal (w->signum, SIG_DFL); 4195 signal (w->signum, SIG_DFL);
4196 }
2476 4197
2477 EV_FREQUENT_CHECK; 4198 EV_FREQUENT_CHECK;
2478} 4199}
2479 4200
4201#endif
4202
4203#if EV_CHILD_ENABLE
4204
2480void 4205void
2481ev_child_start (EV_P_ ev_child *w) 4206ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2482{ 4207{
2483#if EV_MULTIPLICITY 4208#if EV_MULTIPLICITY
2484 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4209 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2485#endif 4210#endif
2486 if (expect_false (ev_is_active (w))) 4211 if (expect_false (ev_is_active (w)))
2487 return; 4212 return;
2488 4213
2489 EV_FREQUENT_CHECK; 4214 EV_FREQUENT_CHECK;
2490 4215
2491 ev_start (EV_A_ (W)w, 1); 4216 ev_start (EV_A_ (W)w, 1);
2492 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4217 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2493 4218
2494 EV_FREQUENT_CHECK; 4219 EV_FREQUENT_CHECK;
2495} 4220}
2496 4221
2497void 4222void
2498ev_child_stop (EV_P_ ev_child *w) 4223ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2499{ 4224{
2500 clear_pending (EV_A_ (W)w); 4225 clear_pending (EV_A_ (W)w);
2501 if (expect_false (!ev_is_active (w))) 4226 if (expect_false (!ev_is_active (w)))
2502 return; 4227 return;
2503 4228
2504 EV_FREQUENT_CHECK; 4229 EV_FREQUENT_CHECK;
2505 4230
2506 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4231 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2507 ev_stop (EV_A_ (W)w); 4232 ev_stop (EV_A_ (W)w);
2508 4233
2509 EV_FREQUENT_CHECK; 4234 EV_FREQUENT_CHECK;
2510} 4235}
4236
4237#endif
2511 4238
2512#if EV_STAT_ENABLE 4239#if EV_STAT_ENABLE
2513 4240
2514# ifdef _WIN32 4241# ifdef _WIN32
2515# undef lstat 4242# undef lstat
… …
2518 4245
2519#define DEF_STAT_INTERVAL 5.0074891 4246#define DEF_STAT_INTERVAL 5.0074891
2520#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4247#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2521#define MIN_STAT_INTERVAL 0.1074891 4248#define MIN_STAT_INTERVAL 0.1074891
2522 4249
2523static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4250noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2524 4251
2525#if EV_USE_INOTIFY 4252#if EV_USE_INOTIFY
2526# define EV_INOTIFY_BUFSIZE 8192
2527 4253
2528static void noinline 4254/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4255# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4256
4257noinline
4258static void
2529infy_add (EV_P_ ev_stat *w) 4259infy_add (EV_P_ ev_stat *w)
2530{ 4260{
2531 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); 4261 w->wd = inotify_add_watch (fs_fd, w->path,
4262 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4263 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4264 | IN_DONT_FOLLOW | IN_MASK_ADD);
2532 4265
2533 if (w->wd < 0) 4266 if (w->wd >= 0)
4267 {
4268 struct statfs sfs;
4269
4270 /* now local changes will be tracked by inotify, but remote changes won't */
4271 /* unless the filesystem is known to be local, we therefore still poll */
4272 /* also do poll on <2.6.25, but with normal frequency */
4273
4274 if (!fs_2625)
4275 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4276 else if (!statfs (w->path, &sfs)
4277 && (sfs.f_type == 0x1373 /* devfs */
4278 || sfs.f_type == 0x4006 /* fat */
4279 || sfs.f_type == 0x4d44 /* msdos */
4280 || sfs.f_type == 0xEF53 /* ext2/3 */
4281 || sfs.f_type == 0x72b6 /* jffs2 */
4282 || sfs.f_type == 0x858458f6 /* ramfs */
4283 || sfs.f_type == 0x5346544e /* ntfs */
4284 || sfs.f_type == 0x3153464a /* jfs */
4285 || sfs.f_type == 0x9123683e /* btrfs */
4286 || sfs.f_type == 0x52654973 /* reiser3 */
4287 || sfs.f_type == 0x01021994 /* tmpfs */
4288 || sfs.f_type == 0x58465342 /* xfs */))
4289 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4290 else
4291 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2534 { 4292 }
4293 else
4294 {
4295 /* can't use inotify, continue to stat */
2535 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4296 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2536 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2537 4297
2538 /* monitor some parent directory for speedup hints */ 4298 /* if path is not there, monitor some parent directory for speedup hints */
2539 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 4299 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2540 /* but an efficiency issue only */ 4300 /* but an efficiency issue only */
2541 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4301 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2542 { 4302 {
2543 char path [4096]; 4303 char path [4096];
… …
2553 if (!pend || pend == path) 4313 if (!pend || pend == path)
2554 break; 4314 break;
2555 4315
2556 *pend = 0; 4316 *pend = 0;
2557 w->wd = inotify_add_watch (fs_fd, path, mask); 4317 w->wd = inotify_add_watch (fs_fd, path, mask);
2558 } 4318 }
2559 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4319 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2560 } 4320 }
2561 } 4321 }
2562 4322
2563 if (w->wd >= 0) 4323 if (w->wd >= 0)
2564 {
2565 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4324 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2566 4325
2567 /* now local changes will be tracked by inotify, but remote changes won't */ 4326 /* now re-arm timer, if required */
2568 /* unless the filesystem it known to be local, we therefore still poll */ 4327 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2569 /* also do poll on <2.6.25, but with normal frequency */
2570 struct statfs sfs;
2571
2572 if (fs_2625 && !statfs (w->path, &sfs))
2573 if (sfs.f_type == 0x1373 /* devfs */
2574 || sfs.f_type == 0xEF53 /* ext2/3 */
2575 || sfs.f_type == 0x3153464a /* jfs */
2576 || sfs.f_type == 0x52654973 /* reiser3 */
2577 || sfs.f_type == 0x01021994 /* tempfs */
2578 || sfs.f_type == 0x58465342 /* xfs */)
2579 return;
2580
2581 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2582 ev_timer_again (EV_A_ &w->timer); 4328 ev_timer_again (EV_A_ &w->timer);
2583 } 4329 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2584} 4330}
2585 4331
2586static void noinline 4332noinline
4333static void
2587infy_del (EV_P_ ev_stat *w) 4334infy_del (EV_P_ ev_stat *w)
2588{ 4335{
2589 int slot; 4336 int slot;
2590 int wd = w->wd; 4337 int wd = w->wd;
2591 4338
2592 if (wd < 0) 4339 if (wd < 0)
2593 return; 4340 return;
2594 4341
2595 w->wd = -2; 4342 w->wd = -2;
2596 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4343 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2597 wlist_del (&fs_hash [slot].head, (WL)w); 4344 wlist_del (&fs_hash [slot].head, (WL)w);
2598 4345
2599 /* remove this watcher, if others are watching it, they will rearm */ 4346 /* remove this watcher, if others are watching it, they will rearm */
2600 inotify_rm_watch (fs_fd, wd); 4347 inotify_rm_watch (fs_fd, wd);
2601} 4348}
2602 4349
2603static void noinline 4350noinline
4351static void
2604infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4352infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2605{ 4353{
2606 if (slot < 0) 4354 if (slot < 0)
2607 /* overflow, need to check for all hash slots */ 4355 /* overflow, need to check for all hash slots */
2608 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4356 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2609 infy_wd (EV_A_ slot, wd, ev); 4357 infy_wd (EV_A_ slot, wd, ev);
2610 else 4358 else
2611 { 4359 {
2612 WL w_; 4360 WL w_;
2613 4361
2614 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4362 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2615 { 4363 {
2616 ev_stat *w = (ev_stat *)w_; 4364 ev_stat *w = (ev_stat *)w_;
2617 w_ = w_->next; /* lets us remove this watcher and all before it */ 4365 w_ = w_->next; /* lets us remove this watcher and all before it */
2618 4366
2619 if (w->wd == wd || wd == -1) 4367 if (w->wd == wd || wd == -1)
2620 { 4368 {
2621 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4369 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2622 { 4370 {
2623 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4371 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2624 w->wd = -1; 4372 w->wd = -1;
2625 infy_add (EV_A_ w); /* re-add, no matter what */ 4373 infy_add (EV_A_ w); /* re-add, no matter what */
2626 } 4374 }
2627 4375
2628 stat_timer_cb (EV_A_ &w->timer, 0); 4376 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2633 4381
2634static void 4382static void
2635infy_cb (EV_P_ ev_io *w, int revents) 4383infy_cb (EV_P_ ev_io *w, int revents)
2636{ 4384{
2637 char buf [EV_INOTIFY_BUFSIZE]; 4385 char buf [EV_INOTIFY_BUFSIZE];
2638 struct inotify_event *ev = (struct inotify_event *)buf;
2639 int ofs; 4386 int ofs;
2640 int len = read (fs_fd, buf, sizeof (buf)); 4387 int len = read (fs_fd, buf, sizeof (buf));
2641 4388
2642 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4389 for (ofs = 0; ofs < len; )
4390 {
4391 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2643 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4392 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4393 ofs += sizeof (struct inotify_event) + ev->len;
4394 }
2644} 4395}
2645 4396
2646inline_size void 4397inline_size ecb_cold
4398void
2647check_2625 (EV_P) 4399ev_check_2625 (EV_P)
2648{ 4400{
2649 /* kernels < 2.6.25 are borked 4401 /* kernels < 2.6.25 are borked
2650 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4402 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2651 */ 4403 */
2652 struct utsname buf; 4404 if (ev_linux_version () < 0x020619)
2653 int major, minor, micro;
2654
2655 if (uname (&buf))
2656 return; 4405 return;
2657 4406
2658 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2659 return;
2660
2661 if (major < 2
2662 || (major == 2 && minor < 6)
2663 || (major == 2 && minor == 6 && micro < 25))
2664 return;
2665
2666 fs_2625 = 1; 4407 fs_2625 = 1;
4408}
4409
4410inline_size int
4411infy_newfd (void)
4412{
4413#if defined IN_CLOEXEC && defined IN_NONBLOCK
4414 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4415 if (fd >= 0)
4416 return fd;
4417#endif
4418 return inotify_init ();
2667} 4419}
2668 4420
2669inline_size void 4421inline_size void
2670infy_init (EV_P) 4422infy_init (EV_P)
2671{ 4423{
2672 if (fs_fd != -2) 4424 if (fs_fd != -2)
2673 return; 4425 return;
2674 4426
2675 fs_fd = -1; 4427 fs_fd = -1;
2676 4428
2677 check_2625 (EV_A); 4429 ev_check_2625 (EV_A);
2678 4430
2679 fs_fd = inotify_init (); 4431 fs_fd = infy_newfd ();
2680 4432
2681 if (fs_fd >= 0) 4433 if (fs_fd >= 0)
2682 { 4434 {
4435 fd_intern (fs_fd);
2683 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4436 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2684 ev_set_priority (&fs_w, EV_MAXPRI); 4437 ev_set_priority (&fs_w, EV_MAXPRI);
2685 ev_io_start (EV_A_ &fs_w); 4438 ev_io_start (EV_A_ &fs_w);
4439 ev_unref (EV_A);
2686 } 4440 }
2687} 4441}
2688 4442
2689inline_size void 4443inline_size void
2690infy_fork (EV_P) 4444infy_fork (EV_P)
… …
2692 int slot; 4446 int slot;
2693 4447
2694 if (fs_fd < 0) 4448 if (fs_fd < 0)
2695 return; 4449 return;
2696 4450
4451 ev_ref (EV_A);
4452 ev_io_stop (EV_A_ &fs_w);
2697 close (fs_fd); 4453 close (fs_fd);
2698 fs_fd = inotify_init (); 4454 fs_fd = infy_newfd ();
2699 4455
4456 if (fs_fd >= 0)
4457 {
4458 fd_intern (fs_fd);
4459 ev_io_set (&fs_w, fs_fd, EV_READ);
4460 ev_io_start (EV_A_ &fs_w);
4461 ev_unref (EV_A);
4462 }
4463
2700 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4464 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2701 { 4465 {
2702 WL w_ = fs_hash [slot].head; 4466 WL w_ = fs_hash [slot].head;
2703 fs_hash [slot].head = 0; 4467 fs_hash [slot].head = 0;
2704 4468
2705 while (w_) 4469 while (w_)
… …
2710 w->wd = -1; 4474 w->wd = -1;
2711 4475
2712 if (fs_fd >= 0) 4476 if (fs_fd >= 0)
2713 infy_add (EV_A_ w); /* re-add, no matter what */ 4477 infy_add (EV_A_ w); /* re-add, no matter what */
2714 else 4478 else
4479 {
4480 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4481 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2715 ev_timer_again (EV_A_ &w->timer); 4482 ev_timer_again (EV_A_ &w->timer);
4483 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4484 }
2716 } 4485 }
2717 } 4486 }
2718} 4487}
2719 4488
2720#endif 4489#endif
… …
2724#else 4493#else
2725# define EV_LSTAT(p,b) lstat (p, b) 4494# define EV_LSTAT(p,b) lstat (p, b)
2726#endif 4495#endif
2727 4496
2728void 4497void
2729ev_stat_stat (EV_P_ ev_stat *w) 4498ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2730{ 4499{
2731 if (lstat (w->path, &w->attr) < 0) 4500 if (lstat (w->path, &w->attr) < 0)
2732 w->attr.st_nlink = 0; 4501 w->attr.st_nlink = 0;
2733 else if (!w->attr.st_nlink) 4502 else if (!w->attr.st_nlink)
2734 w->attr.st_nlink = 1; 4503 w->attr.st_nlink = 1;
2735} 4504}
2736 4505
2737static void noinline 4506noinline
4507static void
2738stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4508stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2739{ 4509{
2740 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4510 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2741 4511
2742 /* we copy this here each the time so that */ 4512 ev_statdata prev = w->attr;
2743 /* prev has the old value when the callback gets invoked */
2744 w->prev = w->attr;
2745 ev_stat_stat (EV_A_ w); 4513 ev_stat_stat (EV_A_ w);
2746 4514
2747 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4515 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2748 if ( 4516 if (
2749 w->prev.st_dev != w->attr.st_dev 4517 prev.st_dev != w->attr.st_dev
2750 || w->prev.st_ino != w->attr.st_ino 4518 || prev.st_ino != w->attr.st_ino
2751 || w->prev.st_mode != w->attr.st_mode 4519 || prev.st_mode != w->attr.st_mode
2752 || w->prev.st_nlink != w->attr.st_nlink 4520 || prev.st_nlink != w->attr.st_nlink
2753 || w->prev.st_uid != w->attr.st_uid 4521 || prev.st_uid != w->attr.st_uid
2754 || w->prev.st_gid != w->attr.st_gid 4522 || prev.st_gid != w->attr.st_gid
2755 || w->prev.st_rdev != w->attr.st_rdev 4523 || prev.st_rdev != w->attr.st_rdev
2756 || w->prev.st_size != w->attr.st_size 4524 || prev.st_size != w->attr.st_size
2757 || w->prev.st_atime != w->attr.st_atime 4525 || prev.st_atime != w->attr.st_atime
2758 || w->prev.st_mtime != w->attr.st_mtime 4526 || prev.st_mtime != w->attr.st_mtime
2759 || w->prev.st_ctime != w->attr.st_ctime 4527 || prev.st_ctime != w->attr.st_ctime
2760 ) { 4528 ) {
4529 /* we only update w->prev on actual differences */
4530 /* in case we test more often than invoke the callback, */
4531 /* to ensure that prev is always different to attr */
4532 w->prev = prev;
4533
2761 #if EV_USE_INOTIFY 4534 #if EV_USE_INOTIFY
2762 if (fs_fd >= 0) 4535 if (fs_fd >= 0)
2763 { 4536 {
2764 infy_del (EV_A_ w); 4537 infy_del (EV_A_ w);
2765 infy_add (EV_A_ w); 4538 infy_add (EV_A_ w);
… …
2770 ev_feed_event (EV_A_ w, EV_STAT); 4543 ev_feed_event (EV_A_ w, EV_STAT);
2771 } 4544 }
2772} 4545}
2773 4546
2774void 4547void
2775ev_stat_start (EV_P_ ev_stat *w) 4548ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2776{ 4549{
2777 if (expect_false (ev_is_active (w))) 4550 if (expect_false (ev_is_active (w)))
2778 return; 4551 return;
2779 4552
2780 ev_stat_stat (EV_A_ w); 4553 ev_stat_stat (EV_A_ w);
… …
2790 4563
2791 if (fs_fd >= 0) 4564 if (fs_fd >= 0)
2792 infy_add (EV_A_ w); 4565 infy_add (EV_A_ w);
2793 else 4566 else
2794#endif 4567#endif
4568 {
2795 ev_timer_again (EV_A_ &w->timer); 4569 ev_timer_again (EV_A_ &w->timer);
4570 ev_unref (EV_A);
4571 }
2796 4572
2797 ev_start (EV_A_ (W)w, 1); 4573 ev_start (EV_A_ (W)w, 1);
2798 4574
2799 EV_FREQUENT_CHECK; 4575 EV_FREQUENT_CHECK;
2800} 4576}
2801 4577
2802void 4578void
2803ev_stat_stop (EV_P_ ev_stat *w) 4579ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2804{ 4580{
2805 clear_pending (EV_A_ (W)w); 4581 clear_pending (EV_A_ (W)w);
2806 if (expect_false (!ev_is_active (w))) 4582 if (expect_false (!ev_is_active (w)))
2807 return; 4583 return;
2808 4584
2809 EV_FREQUENT_CHECK; 4585 EV_FREQUENT_CHECK;
2810 4586
2811#if EV_USE_INOTIFY 4587#if EV_USE_INOTIFY
2812 infy_del (EV_A_ w); 4588 infy_del (EV_A_ w);
2813#endif 4589#endif
4590
4591 if (ev_is_active (&w->timer))
4592 {
4593 ev_ref (EV_A);
2814 ev_timer_stop (EV_A_ &w->timer); 4594 ev_timer_stop (EV_A_ &w->timer);
4595 }
2815 4596
2816 ev_stop (EV_A_ (W)w); 4597 ev_stop (EV_A_ (W)w);
2817 4598
2818 EV_FREQUENT_CHECK; 4599 EV_FREQUENT_CHECK;
2819} 4600}
2820#endif 4601#endif
2821 4602
2822#if EV_IDLE_ENABLE 4603#if EV_IDLE_ENABLE
2823void 4604void
2824ev_idle_start (EV_P_ ev_idle *w) 4605ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2825{ 4606{
2826 if (expect_false (ev_is_active (w))) 4607 if (expect_false (ev_is_active (w)))
2827 return; 4608 return;
2828 4609
2829 pri_adjust (EV_A_ (W)w); 4610 pri_adjust (EV_A_ (W)w);
… …
2842 4623
2843 EV_FREQUENT_CHECK; 4624 EV_FREQUENT_CHECK;
2844} 4625}
2845 4626
2846void 4627void
2847ev_idle_stop (EV_P_ ev_idle *w) 4628ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2848{ 4629{
2849 clear_pending (EV_A_ (W)w); 4630 clear_pending (EV_A_ (W)w);
2850 if (expect_false (!ev_is_active (w))) 4631 if (expect_false (!ev_is_active (w)))
2851 return; 4632 return;
2852 4633
… …
2864 4645
2865 EV_FREQUENT_CHECK; 4646 EV_FREQUENT_CHECK;
2866} 4647}
2867#endif 4648#endif
2868 4649
4650#if EV_PREPARE_ENABLE
2869void 4651void
2870ev_prepare_start (EV_P_ ev_prepare *w) 4652ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2871{ 4653{
2872 if (expect_false (ev_is_active (w))) 4654 if (expect_false (ev_is_active (w)))
2873 return; 4655 return;
2874 4656
2875 EV_FREQUENT_CHECK; 4657 EV_FREQUENT_CHECK;
… …
2880 4662
2881 EV_FREQUENT_CHECK; 4663 EV_FREQUENT_CHECK;
2882} 4664}
2883 4665
2884void 4666void
2885ev_prepare_stop (EV_P_ ev_prepare *w) 4667ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2886{ 4668{
2887 clear_pending (EV_A_ (W)w); 4669 clear_pending (EV_A_ (W)w);
2888 if (expect_false (!ev_is_active (w))) 4670 if (expect_false (!ev_is_active (w)))
2889 return; 4671 return;
2890 4672
… …
2899 4681
2900 ev_stop (EV_A_ (W)w); 4682 ev_stop (EV_A_ (W)w);
2901 4683
2902 EV_FREQUENT_CHECK; 4684 EV_FREQUENT_CHECK;
2903} 4685}
4686#endif
2904 4687
4688#if EV_CHECK_ENABLE
2905void 4689void
2906ev_check_start (EV_P_ ev_check *w) 4690ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2907{ 4691{
2908 if (expect_false (ev_is_active (w))) 4692 if (expect_false (ev_is_active (w)))
2909 return; 4693 return;
2910 4694
2911 EV_FREQUENT_CHECK; 4695 EV_FREQUENT_CHECK;
… …
2916 4700
2917 EV_FREQUENT_CHECK; 4701 EV_FREQUENT_CHECK;
2918} 4702}
2919 4703
2920void 4704void
2921ev_check_stop (EV_P_ ev_check *w) 4705ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2922{ 4706{
2923 clear_pending (EV_A_ (W)w); 4707 clear_pending (EV_A_ (W)w);
2924 if (expect_false (!ev_is_active (w))) 4708 if (expect_false (!ev_is_active (w)))
2925 return; 4709 return;
2926 4710
… …
2935 4719
2936 ev_stop (EV_A_ (W)w); 4720 ev_stop (EV_A_ (W)w);
2937 4721
2938 EV_FREQUENT_CHECK; 4722 EV_FREQUENT_CHECK;
2939} 4723}
4724#endif
2940 4725
2941#if EV_EMBED_ENABLE 4726#if EV_EMBED_ENABLE
2942void noinline 4727noinline
4728void
2943ev_embed_sweep (EV_P_ ev_embed *w) 4729ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2944{ 4730{
2945 ev_loop (w->other, EVLOOP_NONBLOCK); 4731 ev_run (w->other, EVRUN_NOWAIT);
2946} 4732}
2947 4733
2948static void 4734static void
2949embed_io_cb (EV_P_ ev_io *io, int revents) 4735embed_io_cb (EV_P_ ev_io *io, int revents)
2950{ 4736{
2951 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4737 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2952 4738
2953 if (ev_cb (w)) 4739 if (ev_cb (w))
2954 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4740 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2955 else 4741 else
2956 ev_loop (w->other, EVLOOP_NONBLOCK); 4742 ev_run (w->other, EVRUN_NOWAIT);
2957} 4743}
2958 4744
2959static void 4745static void
2960embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4746embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2961{ 4747{
2962 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4748 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2963 4749
2964 { 4750 {
2965 struct ev_loop *loop = w->other; 4751 EV_P = w->other;
2966 4752
2967 while (fdchangecnt) 4753 while (fdchangecnt)
2968 { 4754 {
2969 fd_reify (EV_A); 4755 fd_reify (EV_A);
2970 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4756 ev_run (EV_A_ EVRUN_NOWAIT);
2971 } 4757 }
2972 } 4758 }
2973} 4759}
2974 4760
2975static void 4761static void
… …
2978 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 4764 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2979 4765
2980 ev_embed_stop (EV_A_ w); 4766 ev_embed_stop (EV_A_ w);
2981 4767
2982 { 4768 {
2983 struct ev_loop *loop = w->other; 4769 EV_P = w->other;
2984 4770
2985 ev_loop_fork (EV_A); 4771 ev_loop_fork (EV_A);
2986 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4772 ev_run (EV_A_ EVRUN_NOWAIT);
2987 } 4773 }
2988 4774
2989 ev_embed_start (EV_A_ w); 4775 ev_embed_start (EV_A_ w);
2990} 4776}
2991 4777
… …
2996 ev_idle_stop (EV_A_ idle); 4782 ev_idle_stop (EV_A_ idle);
2997} 4783}
2998#endif 4784#endif
2999 4785
3000void 4786void
3001ev_embed_start (EV_P_ ev_embed *w) 4787ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3002{ 4788{
3003 if (expect_false (ev_is_active (w))) 4789 if (expect_false (ev_is_active (w)))
3004 return; 4790 return;
3005 4791
3006 { 4792 {
3007 struct ev_loop *loop = w->other; 4793 EV_P = w->other;
3008 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4794 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3009 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4795 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3010 } 4796 }
3011 4797
3012 EV_FREQUENT_CHECK; 4798 EV_FREQUENT_CHECK;
… …
3027 4813
3028 EV_FREQUENT_CHECK; 4814 EV_FREQUENT_CHECK;
3029} 4815}
3030 4816
3031void 4817void
3032ev_embed_stop (EV_P_ ev_embed *w) 4818ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3033{ 4819{
3034 clear_pending (EV_A_ (W)w); 4820 clear_pending (EV_A_ (W)w);
3035 if (expect_false (!ev_is_active (w))) 4821 if (expect_false (!ev_is_active (w)))
3036 return; 4822 return;
3037 4823
… …
3039 4825
3040 ev_io_stop (EV_A_ &w->io); 4826 ev_io_stop (EV_A_ &w->io);
3041 ev_prepare_stop (EV_A_ &w->prepare); 4827 ev_prepare_stop (EV_A_ &w->prepare);
3042 ev_fork_stop (EV_A_ &w->fork); 4828 ev_fork_stop (EV_A_ &w->fork);
3043 4829
4830 ev_stop (EV_A_ (W)w);
4831
3044 EV_FREQUENT_CHECK; 4832 EV_FREQUENT_CHECK;
3045} 4833}
3046#endif 4834#endif
3047 4835
3048#if EV_FORK_ENABLE 4836#if EV_FORK_ENABLE
3049void 4837void
3050ev_fork_start (EV_P_ ev_fork *w) 4838ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3051{ 4839{
3052 if (expect_false (ev_is_active (w))) 4840 if (expect_false (ev_is_active (w)))
3053 return; 4841 return;
3054 4842
3055 EV_FREQUENT_CHECK; 4843 EV_FREQUENT_CHECK;
… …
3060 4848
3061 EV_FREQUENT_CHECK; 4849 EV_FREQUENT_CHECK;
3062} 4850}
3063 4851
3064void 4852void
3065ev_fork_stop (EV_P_ ev_fork *w) 4853ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3066{ 4854{
3067 clear_pending (EV_A_ (W)w); 4855 clear_pending (EV_A_ (W)w);
3068 if (expect_false (!ev_is_active (w))) 4856 if (expect_false (!ev_is_active (w)))
3069 return; 4857 return;
3070 4858
… …
3081 4869
3082 EV_FREQUENT_CHECK; 4870 EV_FREQUENT_CHECK;
3083} 4871}
3084#endif 4872#endif
3085 4873
3086#if EV_ASYNC_ENABLE 4874#if EV_CLEANUP_ENABLE
3087void 4875void
3088ev_async_start (EV_P_ ev_async *w) 4876ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3089{ 4877{
3090 if (expect_false (ev_is_active (w))) 4878 if (expect_false (ev_is_active (w)))
3091 return; 4879 return;
4880
4881 EV_FREQUENT_CHECK;
4882
4883 ev_start (EV_A_ (W)w, ++cleanupcnt);
4884 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4885 cleanups [cleanupcnt - 1] = w;
4886
4887 /* cleanup watchers should never keep a refcount on the loop */
4888 ev_unref (EV_A);
4889 EV_FREQUENT_CHECK;
4890}
4891
4892void
4893ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4894{
4895 clear_pending (EV_A_ (W)w);
4896 if (expect_false (!ev_is_active (w)))
4897 return;
4898
4899 EV_FREQUENT_CHECK;
4900 ev_ref (EV_A);
4901
4902 {
4903 int active = ev_active (w);
4904
4905 cleanups [active - 1] = cleanups [--cleanupcnt];
4906 ev_active (cleanups [active - 1]) = active;
4907 }
4908
4909 ev_stop (EV_A_ (W)w);
4910
4911 EV_FREQUENT_CHECK;
4912}
4913#endif
4914
4915#if EV_ASYNC_ENABLE
4916void
4917ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4918{
4919 if (expect_false (ev_is_active (w)))
4920 return;
4921
4922 w->sent = 0;
3092 4923
3093 evpipe_init (EV_A); 4924 evpipe_init (EV_A);
3094 4925
3095 EV_FREQUENT_CHECK; 4926 EV_FREQUENT_CHECK;
3096 4927
… …
3100 4931
3101 EV_FREQUENT_CHECK; 4932 EV_FREQUENT_CHECK;
3102} 4933}
3103 4934
3104void 4935void
3105ev_async_stop (EV_P_ ev_async *w) 4936ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3106{ 4937{
3107 clear_pending (EV_A_ (W)w); 4938 clear_pending (EV_A_ (W)w);
3108 if (expect_false (!ev_is_active (w))) 4939 if (expect_false (!ev_is_active (w)))
3109 return; 4940 return;
3110 4941
… …
3121 4952
3122 EV_FREQUENT_CHECK; 4953 EV_FREQUENT_CHECK;
3123} 4954}
3124 4955
3125void 4956void
3126ev_async_send (EV_P_ ev_async *w) 4957ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3127{ 4958{
3128 w->sent = 1; 4959 w->sent = 1;
3129 evpipe_write (EV_A_ &gotasync); 4960 evpipe_write (EV_A_ &async_pending);
3130} 4961}
3131#endif 4962#endif
3132 4963
3133/*****************************************************************************/ 4964/*****************************************************************************/
3134 4965
… …
3168 4999
3169 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5000 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3170} 5001}
3171 5002
3172void 5003void
3173ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3174{ 5005{
3175 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3176 5007
3177 if (expect_false (!once)) 5008 if (expect_false (!once))
3178 { 5009 {
3179 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 5010 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3180 return; 5011 return;
3181 } 5012 }
3182 5013
3183 once->cb = cb; 5014 once->cb = cb;
3184 once->arg = arg; 5015 once->arg = arg;
… …
3198 } 5029 }
3199} 5030}
3200 5031
3201/*****************************************************************************/ 5032/*****************************************************************************/
3202 5033
3203#if 0 5034#if EV_WALK_ENABLE
5035ecb_cold
3204void 5036void
3205ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5037ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3206{ 5038{
3207 int i, j; 5039 int i, j;
3208 ev_watcher_list *wl, *wn; 5040 ev_watcher_list *wl, *wn;
3209 5041
3210 if (types & (EV_IO | EV_EMBED)) 5042 if (types & (EV_IO | EV_EMBED))
… …
3224#if EV_USE_INOTIFY 5056#if EV_USE_INOTIFY
3225 if (ev_cb ((ev_io *)wl) == infy_cb) 5057 if (ev_cb ((ev_io *)wl) == infy_cb)
3226 ; 5058 ;
3227 else 5059 else
3228#endif 5060#endif
3229 if ((ev_io *)wl != &pipeev) 5061 if ((ev_io *)wl != &pipe_w)
3230 if (types & EV_IO) 5062 if (types & EV_IO)
3231 cb (EV_A_ EV_IO, wl); 5063 cb (EV_A_ EV_IO, wl);
3232 5064
3233 wl = wn; 5065 wl = wn;
3234 } 5066 }
… …
3253 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5085 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3254#endif 5086#endif
3255 5087
3256#if EV_IDLE_ENABLE 5088#if EV_IDLE_ENABLE
3257 if (types & EV_IDLE) 5089 if (types & EV_IDLE)
3258 for (j = NUMPRI; i--; ) 5090 for (j = NUMPRI; j--; )
3259 for (i = idlecnt [j]; i--; ) 5091 for (i = idlecnt [j]; i--; )
3260 cb (EV_A_ EV_IDLE, idles [j][i]); 5092 cb (EV_A_ EV_IDLE, idles [j][i]);
3261#endif 5093#endif
3262 5094
3263#if EV_FORK_ENABLE 5095#if EV_FORK_ENABLE
… …
3271 if (types & EV_ASYNC) 5103 if (types & EV_ASYNC)
3272 for (i = asynccnt; i--; ) 5104 for (i = asynccnt; i--; )
3273 cb (EV_A_ EV_ASYNC, asyncs [i]); 5105 cb (EV_A_ EV_ASYNC, asyncs [i]);
3274#endif 5106#endif
3275 5107
5108#if EV_PREPARE_ENABLE
3276 if (types & EV_PREPARE) 5109 if (types & EV_PREPARE)
3277 for (i = preparecnt; i--; ) 5110 for (i = preparecnt; i--; )
3278#if EV_EMBED_ENABLE 5111# if EV_EMBED_ENABLE
3279 if (ev_cb (prepares [i]) != embed_prepare_cb) 5112 if (ev_cb (prepares [i]) != embed_prepare_cb)
3280#endif 5113# endif
3281 cb (EV_A_ EV_PREPARE, prepares [i]); 5114 cb (EV_A_ EV_PREPARE, prepares [i]);
5115#endif
3282 5116
5117#if EV_CHECK_ENABLE
3283 if (types & EV_CHECK) 5118 if (types & EV_CHECK)
3284 for (i = checkcnt; i--; ) 5119 for (i = checkcnt; i--; )
3285 cb (EV_A_ EV_CHECK, checks [i]); 5120 cb (EV_A_ EV_CHECK, checks [i]);
5121#endif
3286 5122
5123#if EV_SIGNAL_ENABLE
3287 if (types & EV_SIGNAL) 5124 if (types & EV_SIGNAL)
3288 for (i = 0; i < signalmax; ++i) 5125 for (i = 0; i < EV_NSIG - 1; ++i)
3289 for (wl = signals [i].head; wl; ) 5126 for (wl = signals [i].head; wl; )
3290 { 5127 {
3291 wn = wl->next; 5128 wn = wl->next;
3292 cb (EV_A_ EV_SIGNAL, wl); 5129 cb (EV_A_ EV_SIGNAL, wl);
3293 wl = wn; 5130 wl = wn;
3294 } 5131 }
5132#endif
3295 5133
5134#if EV_CHILD_ENABLE
3296 if (types & EV_CHILD) 5135 if (types & EV_CHILD)
3297 for (i = EV_PID_HASHSIZE; i--; ) 5136 for (i = (EV_PID_HASHSIZE); i--; )
3298 for (wl = childs [i]; wl; ) 5137 for (wl = childs [i]; wl; )
3299 { 5138 {
3300 wn = wl->next; 5139 wn = wl->next;
3301 cb (EV_A_ EV_CHILD, wl); 5140 cb (EV_A_ EV_CHILD, wl);
3302 wl = wn; 5141 wl = wn;
3303 } 5142 }
5143#endif
3304/* EV_STAT 0x00001000 /* stat data changed */ 5144/* EV_STAT 0x00001000 /* stat data changed */
3305/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5145/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3306} 5146}
3307#endif 5147#endif
3308 5148
3309#if EV_MULTIPLICITY 5149#if EV_MULTIPLICITY
3310 #include "ev_wrap.h" 5150 #include "ev_wrap.h"
3311#endif 5151#endif
3312 5152
3313#ifdef __cplusplus
3314}
3315#endif
3316

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