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Comparing libev/ev.c (file contents):
Revision 1.330 by root, Tue Mar 9 08:46:17 2010 UTC vs.
Revision 1.522 by root, Tue Dec 31 06:02:28 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 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
62# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
63# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
64# endif 66# endif
65 67
66# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# 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
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
109# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
114# ifndef EV_USE_KQUEUE 120# if HAVE_LINUX_AIO_ABI_H
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 121# ifndef EV_USE_LINUXAIO
116# define EV_USE_KQUEUE 1 122# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
117# else
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
120# endif 127# endif
121 128
129# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
122# ifndef EV_USE_PORT 130# ifndef EV_USE_IOURING
123# if HAVE_PORT_H && HAVE_PORT_CREATE 131# define EV_USE_IOURING EV_FEATURE_BACKENDS
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif 132# endif
128# endif
129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else 133# else
134# undef EV_USE_IOURING
134# define EV_USE_INOTIFY 0 135# define EV_USE_IOURING 0
135# endif
136# endif
137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif 136# endif
153 137
138# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
139# ifndef EV_USE_KQUEUE
140# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
141# endif
142# else
143# undef EV_USE_KQUEUE
144# define EV_USE_KQUEUE 0
154#endif 145# endif
146
147# if HAVE_PORT_H && HAVE_PORT_CREATE
148# ifndef EV_USE_PORT
149# define EV_USE_PORT EV_FEATURE_BACKENDS
150# endif
151# else
152# undef EV_USE_PORT
153# define EV_USE_PORT 0
154# endif
155 155
156#include <math.h> 156# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
157# ifndef EV_USE_INOTIFY
158# define EV_USE_INOTIFY EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_INOTIFY
162# define EV_USE_INOTIFY 0
163# endif
164
165# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
166# ifndef EV_USE_SIGNALFD
167# define EV_USE_SIGNALFD EV_FEATURE_OS
168# endif
169# else
170# undef EV_USE_SIGNALFD
171# define EV_USE_SIGNALFD 0
172# endif
173
174# if HAVE_EVENTFD
175# ifndef EV_USE_EVENTFD
176# define EV_USE_EVENTFD EV_FEATURE_OS
177# endif
178# else
179# undef EV_USE_EVENTFD
180# define EV_USE_EVENTFD 0
181# endif
182
183# if HAVE_SYS_TIMERFD_H
184# ifndef EV_USE_TIMERFD
185# define EV_USE_TIMERFD EV_FEATURE_OS
186# endif
187# else
188# undef EV_USE_TIMERFD
189# define EV_USE_TIMERFD 0
190# endif
191
192#endif
193
194/* OS X, in its infinite idiocy, actually HARDCODES
195 * a limit of 1024 into their select. Where people have brains,
196 * OS X engineers apparently have a vacuum. Or maybe they were
197 * ordered to have a vacuum, or they do anything for money.
198 * This might help. Or not.
199 * Note that this must be defined early, as other include files
200 * will rely on this define as well.
201 */
202#define _DARWIN_UNLIMITED_SELECT 1
203
157#include <stdlib.h> 204#include <stdlib.h>
158#include <string.h> 205#include <string.h>
159#include <fcntl.h> 206#include <fcntl.h>
160#include <stddef.h> 207#include <stddef.h>
161 208
… …
171 218
172#ifdef EV_H 219#ifdef EV_H
173# include EV_H 220# include EV_H
174#else 221#else
175# include "ev.h" 222# include "ev.h"
223#endif
224
225#if EV_NO_THREADS
226# undef EV_NO_SMP
227# define EV_NO_SMP 1
228# undef ECB_NO_THREADS
229# define ECB_NO_THREADS 1
230#endif
231#if EV_NO_SMP
232# undef EV_NO_SMP
233# define ECB_NO_SMP 1
176#endif 234#endif
177 235
178#ifndef _WIN32 236#ifndef _WIN32
179# include <sys/time.h> 237# include <sys/time.h>
180# include <sys/wait.h> 238# include <sys/wait.h>
181# include <unistd.h> 239# include <unistd.h>
182#else 240#else
183# include <io.h> 241# include <io.h>
184# define WIN32_LEAN_AND_MEAN 242# define WIN32_LEAN_AND_MEAN
243# include <winsock2.h>
185# include <windows.h> 244# include <windows.h>
186# ifndef EV_SELECT_IS_WINSOCKET 245# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 246# define EV_SELECT_IS_WINSOCKET 1
188# endif 247# endif
248# undef EV_AVOID_STDIO
189#endif 249#endif
190 250
191/* this block tries to deduce configuration from header-defined symbols and defaults */ 251/* this block tries to deduce configuration from header-defined symbols and defaults */
192 252
193/* try to deduce the maximum number of signals on this platform */ 253/* try to deduce the maximum number of signals on this platform */
194#if defined (EV_NSIG) 254#if defined EV_NSIG
195/* use what's provided */ 255/* use what's provided */
196#elif defined (NSIG) 256#elif defined NSIG
197# define EV_NSIG (NSIG) 257# define EV_NSIG (NSIG)
198#elif defined(_NSIG) 258#elif defined _NSIG
199# define EV_NSIG (_NSIG) 259# define EV_NSIG (_NSIG)
200#elif defined (SIGMAX) 260#elif defined SIGMAX
201# define EV_NSIG (SIGMAX+1) 261# define EV_NSIG (SIGMAX+1)
202#elif defined (SIG_MAX) 262#elif defined SIG_MAX
203# define EV_NSIG (SIG_MAX+1) 263# define EV_NSIG (SIG_MAX+1)
204#elif defined (_SIG_MAX) 264#elif defined _SIG_MAX
205# define EV_NSIG (_SIG_MAX+1) 265# define EV_NSIG (_SIG_MAX+1)
206#elif defined (MAXSIG) 266#elif defined MAXSIG
207# define EV_NSIG (MAXSIG+1) 267# define EV_NSIG (MAXSIG+1)
208#elif defined (MAX_SIG) 268#elif defined MAX_SIG
209# define EV_NSIG (MAX_SIG+1) 269# define EV_NSIG (MAX_SIG+1)
210#elif defined (SIGARRAYSIZE) 270#elif defined SIGARRAYSIZE
211# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 271# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
212#elif defined (_sys_nsig) 272#elif defined _sys_nsig
213# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 273# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
214#else 274#else
215# error "unable to find value for NSIG, please report" 275# define EV_NSIG (8 * sizeof (sigset_t) + 1)
216/* to make it compile regardless, just remove the above line */ 276#endif
217# define EV_NSIG 65 277
278#ifndef EV_USE_FLOOR
279# define EV_USE_FLOOR 0
218#endif 280#endif
219 281
220#ifndef EV_USE_CLOCK_SYSCALL 282#ifndef EV_USE_CLOCK_SYSCALL
221# if __linux && __GLIBC__ >= 2 283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
222# define EV_USE_CLOCK_SYSCALL 1 284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
223# else 285# else
224# define EV_USE_CLOCK_SYSCALL 0 286# define EV_USE_CLOCK_SYSCALL 0
225# endif 287# endif
226#endif 288#endif
227 289
290#if !(_POSIX_TIMERS > 0)
291# ifndef EV_USE_MONOTONIC
292# define EV_USE_MONOTONIC 0
293# endif
294# ifndef EV_USE_REALTIME
295# define EV_USE_REALTIME 0
296# endif
297#endif
298
228#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
229# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
230# define EV_USE_MONOTONIC 1 301# define EV_USE_MONOTONIC EV_FEATURE_OS
231# else 302# else
232# define EV_USE_MONOTONIC 0 303# define EV_USE_MONOTONIC 0
233# endif 304# endif
234#endif 305#endif
235 306
… …
237# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 308# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
238#endif 309#endif
239 310
240#ifndef EV_USE_NANOSLEEP 311#ifndef EV_USE_NANOSLEEP
241# if _POSIX_C_SOURCE >= 199309L 312# if _POSIX_C_SOURCE >= 199309L
242# define EV_USE_NANOSLEEP 1 313# define EV_USE_NANOSLEEP EV_FEATURE_OS
243# else 314# else
244# define EV_USE_NANOSLEEP 0 315# define EV_USE_NANOSLEEP 0
245# endif 316# endif
246#endif 317#endif
247 318
248#ifndef EV_USE_SELECT 319#ifndef EV_USE_SELECT
249# define EV_USE_SELECT 1 320# define EV_USE_SELECT EV_FEATURE_BACKENDS
250#endif 321#endif
251 322
252#ifndef EV_USE_POLL 323#ifndef EV_USE_POLL
253# ifdef _WIN32 324# ifdef _WIN32
254# define EV_USE_POLL 0 325# define EV_USE_POLL 0
255# else 326# else
256# define EV_USE_POLL 1 327# define EV_USE_POLL EV_FEATURE_BACKENDS
257# endif 328# endif
258#endif 329#endif
259 330
260#ifndef EV_USE_EPOLL 331#ifndef EV_USE_EPOLL
261# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 332# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
262# define EV_USE_EPOLL 1 333# define EV_USE_EPOLL EV_FEATURE_BACKENDS
263# else 334# else
264# define EV_USE_EPOLL 0 335# define EV_USE_EPOLL 0
265# endif 336# endif
266#endif 337#endif
267 338
… …
271 342
272#ifndef EV_USE_PORT 343#ifndef EV_USE_PORT
273# define EV_USE_PORT 0 344# define EV_USE_PORT 0
274#endif 345#endif
275 346
347#ifndef EV_USE_LINUXAIO
348# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
349# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
350# else
351# define EV_USE_LINUXAIO 0
352# endif
353#endif
354
355#ifndef EV_USE_IOURING
356# if __linux /* later checks might disable again */
357# define EV_USE_IOURING 1
358# else
359# define EV_USE_IOURING 0
360# endif
361#endif
362
276#ifndef EV_USE_INOTIFY 363#ifndef EV_USE_INOTIFY
277# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
278# define EV_USE_INOTIFY 1 365# define EV_USE_INOTIFY EV_FEATURE_OS
279# else 366# else
280# define EV_USE_INOTIFY 0 367# define EV_USE_INOTIFY 0
281# endif 368# endif
282#endif 369#endif
283 370
284#ifndef EV_PID_HASHSIZE 371#ifndef EV_PID_HASHSIZE
285# if EV_MINIMAL 372# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
286# define EV_PID_HASHSIZE 1
287# else
288# define EV_PID_HASHSIZE 16
289# endif
290#endif 373#endif
291 374
292#ifndef EV_INOTIFY_HASHSIZE 375#ifndef EV_INOTIFY_HASHSIZE
293# if EV_MINIMAL 376# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
294# define EV_INOTIFY_HASHSIZE 1
295# else
296# define EV_INOTIFY_HASHSIZE 16
297# endif
298#endif 377#endif
299 378
300#ifndef EV_USE_EVENTFD 379#ifndef EV_USE_EVENTFD
301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 380# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
302# define EV_USE_EVENTFD 1 381# define EV_USE_EVENTFD EV_FEATURE_OS
303# else 382# else
304# define EV_USE_EVENTFD 0 383# define EV_USE_EVENTFD 0
305# endif 384# endif
306#endif 385#endif
307 386
308#ifndef EV_USE_SIGNALFD 387#ifndef EV_USE_SIGNALFD
309# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 388# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
310# define EV_USE_SIGNALFD 1 389# define EV_USE_SIGNALFD EV_FEATURE_OS
311# else 390# else
312# define EV_USE_SIGNALFD 0 391# define EV_USE_SIGNALFD 0
392# endif
393#endif
394
395#ifndef EV_USE_TIMERFD
396# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
397# define EV_USE_TIMERFD EV_FEATURE_OS
398# else
399# define EV_USE_TIMERFD 0
313# endif 400# endif
314#endif 401#endif
315 402
316#if 0 /* debugging */ 403#if 0 /* debugging */
317# define EV_VERIFY 3 404# define EV_VERIFY 3
318# define EV_USE_4HEAP 1 405# define EV_USE_4HEAP 1
319# define EV_HEAP_CACHE_AT 1 406# define EV_HEAP_CACHE_AT 1
320#endif 407#endif
321 408
322#ifndef EV_VERIFY 409#ifndef EV_VERIFY
323# define EV_VERIFY !EV_MINIMAL 410# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
324#endif 411#endif
325 412
326#ifndef EV_USE_4HEAP 413#ifndef EV_USE_4HEAP
327# define EV_USE_4HEAP !EV_MINIMAL 414# define EV_USE_4HEAP EV_FEATURE_DATA
328#endif 415#endif
329 416
330#ifndef EV_HEAP_CACHE_AT 417#ifndef EV_HEAP_CACHE_AT
331# define EV_HEAP_CACHE_AT !EV_MINIMAL 418# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
419#endif
420
421#ifdef __ANDROID__
422/* supposedly, android doesn't typedef fd_mask */
423# undef EV_USE_SELECT
424# define EV_USE_SELECT 0
425/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
426# undef EV_USE_CLOCK_SYSCALL
427# define EV_USE_CLOCK_SYSCALL 0
428#endif
429
430/* aix's poll.h seems to cause lots of trouble */
431#ifdef _AIX
432/* AIX has a completely broken poll.h header */
433# undef EV_USE_POLL
434# define EV_USE_POLL 0
332#endif 435#endif
333 436
334/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 437/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
335/* which makes programs even slower. might work on other unices, too. */ 438/* which makes programs even slower. might work on other unices, too. */
336#if EV_USE_CLOCK_SYSCALL 439#if EV_USE_CLOCK_SYSCALL
337# include <syscall.h> 440# include <sys/syscall.h>
338# ifdef SYS_clock_gettime 441# ifdef SYS_clock_gettime
339# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
340# undef EV_USE_MONOTONIC 443# undef EV_USE_MONOTONIC
341# define EV_USE_MONOTONIC 1 444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
342# else 446# else
343# undef EV_USE_CLOCK_SYSCALL 447# undef EV_USE_CLOCK_SYSCALL
344# define EV_USE_CLOCK_SYSCALL 0 448# define EV_USE_CLOCK_SYSCALL 0
345# endif 449# endif
346#endif 450#endif
347 451
348/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 452/* this block fixes any misconfiguration where we know we run into trouble otherwise */
349 453
350#ifdef _AIX
351/* AIX has a completely broken poll.h header */
352# undef EV_USE_POLL
353# define EV_USE_POLL 0
354#endif
355
356#ifndef CLOCK_MONOTONIC 454#ifndef CLOCK_MONOTONIC
357# undef EV_USE_MONOTONIC 455# undef EV_USE_MONOTONIC
358# define EV_USE_MONOTONIC 0 456# define EV_USE_MONOTONIC 0
359#endif 457#endif
360 458
… …
366#if !EV_STAT_ENABLE 464#if !EV_STAT_ENABLE
367# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
368# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
369#endif 467#endif
370 468
469#if __linux && EV_USE_IOURING
470# include <linux/version.h>
471# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
472# undef EV_USE_IOURING
473# define EV_USE_IOURING 0
474# endif
475#endif
476
371#if !EV_USE_NANOSLEEP 477#if !EV_USE_NANOSLEEP
372# ifndef _WIN32 478/* hp-ux has it in sys/time.h, which we unconditionally include above */
479# if !defined _WIN32 && !defined __hpux
373# include <sys/select.h> 480# include <sys/select.h>
374# endif 481# endif
375#endif 482#endif
376 483
484#if EV_USE_LINUXAIO
485# include <sys/syscall.h>
486# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
487# define EV_NEED_SYSCALL 1
488# else
489# undef EV_USE_LINUXAIO
490# define EV_USE_LINUXAIO 0
491# endif
492#endif
493
494#if EV_USE_IOURING
495# include <sys/syscall.h>
496# if !SYS_io_uring_setup && __linux && !__alpha
497# define SYS_io_uring_setup 425
498# define SYS_io_uring_enter 426
499# define SYS_io_uring_wregister 427
500# endif
501# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
502# define EV_NEED_SYSCALL 1
503# else
504# undef EV_USE_IOURING
505# define EV_USE_IOURING 0
506# endif
507#endif
508
377#if EV_USE_INOTIFY 509#if EV_USE_INOTIFY
378# include <sys/utsname.h>
379# include <sys/statfs.h> 510# include <sys/statfs.h>
380# include <sys/inotify.h> 511# include <sys/inotify.h>
381/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 512/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
382# ifndef IN_DONT_FOLLOW 513# ifndef IN_DONT_FOLLOW
383# undef EV_USE_INOTIFY 514# undef EV_USE_INOTIFY
384# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
385# endif 516# endif
386#endif 517#endif
387 518
388#if EV_SELECT_IS_WINSOCKET
389# include <winsock.h>
390#endif
391
392#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
393/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 520/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
394# include <stdint.h> 521# include <stdint.h>
395# ifndef EFD_NONBLOCK 522# ifndef EFD_NONBLOCK
396# define EFD_NONBLOCK O_NONBLOCK 523# define EFD_NONBLOCK O_NONBLOCK
397# endif 524# endif
398# ifndef EFD_CLOEXEC 525# ifndef EFD_CLOEXEC
… …
400# define EFD_CLOEXEC O_CLOEXEC 527# define EFD_CLOEXEC O_CLOEXEC
401# else 528# else
402# define EFD_CLOEXEC 02000000 529# define EFD_CLOEXEC 02000000
403# endif 530# endif
404# endif 531# endif
405# ifdef __cplusplus
406extern "C" {
407# endif
408int (eventfd) (unsigned int initval, int flags); 532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
409# ifdef __cplusplus
410}
411# endif
412#endif 533#endif
413 534
414#if EV_USE_SIGNALFD 535#if EV_USE_SIGNALFD
415/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 536/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
416# include <stdint.h> 537# include <stdint.h>
417# ifndef SFD_NONBLOCK 538# ifndef SFD_NONBLOCK
418# define SFD_NONBLOCK O_NONBLOCK 539# define SFD_NONBLOCK O_NONBLOCK
419# endif 540# endif
420# ifndef SFD_CLOEXEC 541# ifndef SFD_CLOEXEC
… …
422# define SFD_CLOEXEC O_CLOEXEC 543# define SFD_CLOEXEC O_CLOEXEC
423# else 544# else
424# define SFD_CLOEXEC 02000000 545# define SFD_CLOEXEC 02000000
425# endif 546# endif
426# endif 547# endif
427# ifdef __cplusplus
428extern "C" {
429# endif
430int signalfd (int fd, const sigset_t *mask, int flags); 548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
431 549
432struct signalfd_siginfo 550struct signalfd_siginfo
433{ 551{
434 uint32_t ssi_signo; 552 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)]; 553 char pad[128 - sizeof (uint32_t)];
436}; 554};
437# ifdef __cplusplus 555#endif
438} 556
557/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
558#if EV_USE_TIMERFD
559# include <sys/timerfd.h>
560/* timerfd is only used for periodics */
561# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
562# undef EV_USE_TIMERFD
563# define EV_USE_TIMERFD 0
439# endif 564# endif
440#endif 565#endif
441 566
442 567/*****************************************************************************/
443/**/
444 568
445#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
446# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 570# define EV_FREQUENT_CHECK ev_verify (EV_A)
447#else 571#else
448# define EV_FREQUENT_CHECK do { } while (0) 572# define EV_FREQUENT_CHECK do { } while (0)
449#endif 573#endif
450 574
451/* 575/*
452 * This is used to avoid floating point rounding problems. 576 * This is used to work around floating point rounding problems.
453 * It is added to ev_rt_now when scheduling periodics
454 * to ensure progress, time-wise, even when rounding
455 * errors are against us.
456 * This value is good at least till the year 4000. 577 * This value is good at least till the year 4000.
457 * Better solutions welcome.
458 */ 578 */
459#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
460 581
461#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 582#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
462#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 583#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
463 584
585/* find a portable timestamp that is "always" in the future but fits into time_t.
586 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
587 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
588#define EV_TSTAMP_HUGE \
589 (sizeof (time_t) >= 8 ? 10000000000000. \
590 : 0 < (time_t)4294967295 ? 4294967295. \
591 : 2147483647.) \
592
593#ifndef EV_TS_CONST
594# define EV_TS_CONST(nv) nv
595# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
596# define EV_TS_FROM_USEC(us) us * 1e-6
597# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
598# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
599# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
600# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
601#endif
602
603/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
604/* ECB.H BEGIN */
605/*
606 * libecb - http://software.schmorp.de/pkg/libecb
607 *
608 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
609 * Copyright (©) 2011 Emanuele Giaquinta
610 * All rights reserved.
611 *
612 * Redistribution and use in source and binary forms, with or without modifica-
613 * tion, are permitted provided that the following conditions are met:
614 *
615 * 1. Redistributions of source code must retain the above copyright notice,
616 * this list of conditions and the following disclaimer.
617 *
618 * 2. Redistributions in binary form must reproduce the above copyright
619 * notice, this list of conditions and the following disclaimer in the
620 * documentation and/or other materials provided with the distribution.
621 *
622 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
623 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
624 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
625 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
626 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
627 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
628 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
629 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
630 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
631 * OF THE POSSIBILITY OF SUCH DAMAGE.
632 *
633 * Alternatively, the contents of this file may be used under the terms of
634 * the GNU General Public License ("GPL") version 2 or any later version,
635 * in which case the provisions of the GPL are applicable instead of
636 * the above. If you wish to allow the use of your version of this file
637 * only under the terms of the GPL and not to allow others to use your
638 * version of this file under the BSD license, indicate your decision
639 * by deleting the provisions above and replace them with the notice
640 * and other provisions required by the GPL. If you do not delete the
641 * provisions above, a recipient may use your version of this file under
642 * either the BSD or the GPL.
643 */
644
645#ifndef ECB_H
646#define ECB_H
647
648/* 16 bits major, 16 bits minor */
649#define ECB_VERSION 0x00010006
650
651#ifdef _WIN32
652 typedef signed char int8_t;
653 typedef unsigned char uint8_t;
654 typedef signed short int16_t;
655 typedef unsigned short uint16_t;
656 typedef signed int int32_t;
657 typedef unsigned int uint32_t;
464#if __GNUC__ >= 4 658 #if __GNUC__
465# define expect(expr,value) __builtin_expect ((expr),(value)) 659 typedef signed long long int64_t;
466# define noinline __attribute__ ((noinline)) 660 typedef unsigned long long uint64_t;
661 #else /* _MSC_VER || __BORLANDC__ */
662 typedef signed __int64 int64_t;
663 typedef unsigned __int64 uint64_t;
664 #endif
665 #ifdef _WIN64
666 #define ECB_PTRSIZE 8
667 typedef uint64_t uintptr_t;
668 typedef int64_t intptr_t;
669 #else
670 #define ECB_PTRSIZE 4
671 typedef uint32_t uintptr_t;
672 typedef int32_t intptr_t;
673 #endif
467#else 674#else
468# define expect(expr,value) (expr) 675 #include <inttypes.h>
469# define noinline 676 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
470# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 677 #define ECB_PTRSIZE 8
471# define inline 678 #else
679 #define ECB_PTRSIZE 4
680 #endif
472# endif 681#endif
682
683#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
684#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
685
686/* work around x32 idiocy by defining proper macros */
687#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
688 #if _ILP32
689 #define ECB_AMD64_X32 1
690 #else
691 #define ECB_AMD64 1
473#endif 692 #endif
693#endif
474 694
475#define expect_false(expr) expect ((expr) != 0, 0) 695/* many compilers define _GNUC_ to some versions but then only implement
476#define expect_true(expr) expect ((expr) != 0, 1) 696 * what their idiot authors think are the "more important" extensions,
477#define inline_size static inline 697 * causing enormous grief in return for some better fake benchmark numbers.
478 698 * or so.
479#if EV_MINIMAL 699 * we try to detect these and simply assume they are not gcc - if they have
480# define inline_speed static noinline 700 * an issue with that they should have done it right in the first place.
701 */
702#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
703 #define ECB_GCC_VERSION(major,minor) 0
481#else 704#else
705 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
706#endif
707
708#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
709
710#if __clang__ && defined __has_builtin
711 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
712#else
713 #define ECB_CLANG_BUILTIN(x) 0
714#endif
715
716#if __clang__ && defined __has_extension
717 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
718#else
719 #define ECB_CLANG_EXTENSION(x) 0
720#endif
721
722#define ECB_CPP (__cplusplus+0)
723#define ECB_CPP11 (__cplusplus >= 201103L)
724#define ECB_CPP14 (__cplusplus >= 201402L)
725#define ECB_CPP17 (__cplusplus >= 201703L)
726
727#if ECB_CPP
728 #define ECB_C 0
729 #define ECB_STDC_VERSION 0
730#else
731 #define ECB_C 1
732 #define ECB_STDC_VERSION __STDC_VERSION__
733#endif
734
735#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
736#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
737#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
738
739#if ECB_CPP
740 #define ECB_EXTERN_C extern "C"
741 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
742 #define ECB_EXTERN_C_END }
743#else
744 #define ECB_EXTERN_C extern
745 #define ECB_EXTERN_C_BEG
746 #define ECB_EXTERN_C_END
747#endif
748
749/*****************************************************************************/
750
751/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
752/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
753
754#if ECB_NO_THREADS
755 #define ECB_NO_SMP 1
756#endif
757
758#if ECB_NO_SMP
759 #define ECB_MEMORY_FENCE do { } while (0)
760#endif
761
762/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
763#if __xlC__ && ECB_CPP
764 #include <builtins.h>
765#endif
766
767#if 1400 <= _MSC_VER
768 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
769#endif
770
771#ifndef ECB_MEMORY_FENCE
772 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
773 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
774 #if __i386 || __i386__
775 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
776 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
777 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
778 #elif ECB_GCC_AMD64
779 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
780 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
781 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
782 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
783 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
784 #elif defined __ARM_ARCH_2__ \
785 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
786 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
787 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
788 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
789 || defined __ARM_ARCH_5TEJ__
790 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
791 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
792 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
793 || defined __ARM_ARCH_6T2__
794 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
795 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
796 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
797 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
798 #elif __aarch64__
799 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
800 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
801 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
802 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
803 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
804 #elif defined __s390__ || defined __s390x__
805 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
806 #elif defined __mips__
807 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
808 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
809 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
810 #elif defined __alpha__
811 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
812 #elif defined __hppa__
813 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
814 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
815 #elif defined __ia64__
816 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
817 #elif defined __m68k__
818 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
819 #elif defined __m88k__
820 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
821 #elif defined __sh__
822 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
823 #endif
824 #endif
825#endif
826
827#ifndef ECB_MEMORY_FENCE
828 #if ECB_GCC_VERSION(4,7)
829 /* see comment below (stdatomic.h) about the C11 memory model. */
830 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
831 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
832 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
833 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
834
835 #elif ECB_CLANG_EXTENSION(c_atomic)
836 /* see comment below (stdatomic.h) about the C11 memory model. */
837 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
838 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
839 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
840 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
841
842 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
843 #define ECB_MEMORY_FENCE __sync_synchronize ()
844 #elif _MSC_VER >= 1500 /* VC++ 2008 */
845 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
846 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
847 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
848 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
849 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
850 #elif _MSC_VER >= 1400 /* VC++ 2005 */
851 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
852 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
853 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
854 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
855 #elif defined _WIN32
856 #include <WinNT.h>
857 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
858 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
859 #include <mbarrier.h>
860 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
861 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
862 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
863 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
864 #elif __xlC__
865 #define ECB_MEMORY_FENCE __sync ()
866 #endif
867#endif
868
869#ifndef ECB_MEMORY_FENCE
870 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
871 /* we assume that these memory fences work on all variables/all memory accesses, */
872 /* not just C11 atomics and atomic accesses */
873 #include <stdatomic.h>
874 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
875 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
876 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
877 #endif
878#endif
879
880#ifndef ECB_MEMORY_FENCE
881 #if !ECB_AVOID_PTHREADS
882 /*
883 * if you get undefined symbol references to pthread_mutex_lock,
884 * or failure to find pthread.h, then you should implement
885 * the ECB_MEMORY_FENCE operations for your cpu/compiler
886 * OR provide pthread.h and link against the posix thread library
887 * of your system.
888 */
889 #include <pthread.h>
890 #define ECB_NEEDS_PTHREADS 1
891 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
892
893 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
894 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
895 #endif
896#endif
897
898#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
899 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
900#endif
901
902#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
903 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
904#endif
905
906#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
907 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
908#endif
909
910/*****************************************************************************/
911
912#if ECB_CPP
913 #define ecb_inline static inline
914#elif ECB_GCC_VERSION(2,5)
915 #define ecb_inline static __inline__
916#elif ECB_C99
917 #define ecb_inline static inline
918#else
919 #define ecb_inline static
920#endif
921
922#if ECB_GCC_VERSION(3,3)
923 #define ecb_restrict __restrict__
924#elif ECB_C99
925 #define ecb_restrict restrict
926#else
927 #define ecb_restrict
928#endif
929
930typedef int ecb_bool;
931
932#define ECB_CONCAT_(a, b) a ## b
933#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
934#define ECB_STRINGIFY_(a) # a
935#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
936#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
937
938#define ecb_function_ ecb_inline
939
940#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
941 #define ecb_attribute(attrlist) __attribute__ (attrlist)
942#else
943 #define ecb_attribute(attrlist)
944#endif
945
946#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
947 #define ecb_is_constant(expr) __builtin_constant_p (expr)
948#else
949 /* possible C11 impl for integral types
950 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
951 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
952
953 #define ecb_is_constant(expr) 0
954#endif
955
956#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
957 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
958#else
959 #define ecb_expect(expr,value) (expr)
960#endif
961
962#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
963 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
964#else
965 #define ecb_prefetch(addr,rw,locality)
966#endif
967
968/* no emulation for ecb_decltype */
969#if ECB_CPP11
970 // older implementations might have problems with decltype(x)::type, work around it
971 template<class T> struct ecb_decltype_t { typedef T type; };
972 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
973#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
974 #define ecb_decltype(x) __typeof__ (x)
975#endif
976
977#if _MSC_VER >= 1300
978 #define ecb_deprecated __declspec (deprecated)
979#else
980 #define ecb_deprecated ecb_attribute ((__deprecated__))
981#endif
982
983#if _MSC_VER >= 1500
984 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
985#elif ECB_GCC_VERSION(4,5)
986 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
987#else
988 #define ecb_deprecated_message(msg) ecb_deprecated
989#endif
990
991#if _MSC_VER >= 1400
992 #define ecb_noinline __declspec (noinline)
993#else
994 #define ecb_noinline ecb_attribute ((__noinline__))
995#endif
996
997#define ecb_unused ecb_attribute ((__unused__))
998#define ecb_const ecb_attribute ((__const__))
999#define ecb_pure ecb_attribute ((__pure__))
1000
1001#if ECB_C11 || __IBMC_NORETURN
1002 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
1003 #define ecb_noreturn _Noreturn
1004#elif ECB_CPP11
1005 #define ecb_noreturn [[noreturn]]
1006#elif _MSC_VER >= 1200
1007 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
1008 #define ecb_noreturn __declspec (noreturn)
1009#else
1010 #define ecb_noreturn ecb_attribute ((__noreturn__))
1011#endif
1012
1013#if ECB_GCC_VERSION(4,3)
1014 #define ecb_artificial ecb_attribute ((__artificial__))
1015 #define ecb_hot ecb_attribute ((__hot__))
1016 #define ecb_cold ecb_attribute ((__cold__))
1017#else
1018 #define ecb_artificial
1019 #define ecb_hot
1020 #define ecb_cold
1021#endif
1022
1023/* put around conditional expressions if you are very sure that the */
1024/* expression is mostly true or mostly false. note that these return */
1025/* booleans, not the expression. */
1026#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
1027#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
1028/* for compatibility to the rest of the world */
1029#define ecb_likely(expr) ecb_expect_true (expr)
1030#define ecb_unlikely(expr) ecb_expect_false (expr)
1031
1032/* count trailing zero bits and count # of one bits */
1033#if ECB_GCC_VERSION(3,4) \
1034 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
1035 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
1036 && ECB_CLANG_BUILTIN(__builtin_popcount))
1037 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
1038 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
1039 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
1040 #define ecb_ctz32(x) __builtin_ctz (x)
1041 #define ecb_ctz64(x) __builtin_ctzll (x)
1042 #define ecb_popcount32(x) __builtin_popcount (x)
1043 /* no popcountll */
1044#else
1045 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
1046 ecb_function_ ecb_const int
1047 ecb_ctz32 (uint32_t x)
1048 {
1049#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1050 unsigned long r;
1051 _BitScanForward (&r, x);
1052 return (int)r;
1053#else
1054 int r = 0;
1055
1056 x &= ~x + 1; /* this isolates the lowest bit */
1057
1058#if ECB_branchless_on_i386
1059 r += !!(x & 0xaaaaaaaa) << 0;
1060 r += !!(x & 0xcccccccc) << 1;
1061 r += !!(x & 0xf0f0f0f0) << 2;
1062 r += !!(x & 0xff00ff00) << 3;
1063 r += !!(x & 0xffff0000) << 4;
1064#else
1065 if (x & 0xaaaaaaaa) r += 1;
1066 if (x & 0xcccccccc) r += 2;
1067 if (x & 0xf0f0f0f0) r += 4;
1068 if (x & 0xff00ff00) r += 8;
1069 if (x & 0xffff0000) r += 16;
1070#endif
1071
1072 return r;
1073#endif
1074 }
1075
1076 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1077 ecb_function_ ecb_const int
1078 ecb_ctz64 (uint64_t x)
1079 {
1080#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1081 unsigned long r;
1082 _BitScanForward64 (&r, x);
1083 return (int)r;
1084#else
1085 int shift = x & 0xffffffff ? 0 : 32;
1086 return ecb_ctz32 (x >> shift) + shift;
1087#endif
1088 }
1089
1090 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1091 ecb_function_ ecb_const int
1092 ecb_popcount32 (uint32_t x)
1093 {
1094 x -= (x >> 1) & 0x55555555;
1095 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1096 x = ((x >> 4) + x) & 0x0f0f0f0f;
1097 x *= 0x01010101;
1098
1099 return x >> 24;
1100 }
1101
1102 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1103 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1104 {
1105#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1106 unsigned long r;
1107 _BitScanReverse (&r, x);
1108 return (int)r;
1109#else
1110 int r = 0;
1111
1112 if (x >> 16) { x >>= 16; r += 16; }
1113 if (x >> 8) { x >>= 8; r += 8; }
1114 if (x >> 4) { x >>= 4; r += 4; }
1115 if (x >> 2) { x >>= 2; r += 2; }
1116 if (x >> 1) { r += 1; }
1117
1118 return r;
1119#endif
1120 }
1121
1122 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1123 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1124 {
1125#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1126 unsigned long r;
1127 _BitScanReverse64 (&r, x);
1128 return (int)r;
1129#else
1130 int r = 0;
1131
1132 if (x >> 32) { x >>= 32; r += 32; }
1133
1134 return r + ecb_ld32 (x);
1135#endif
1136 }
1137#endif
1138
1139ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1140ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1141ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1142ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1143
1144ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1145ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1146{
1147 return ( (x * 0x0802U & 0x22110U)
1148 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1149}
1150
1151ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1152ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1153{
1154 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1155 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1156 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1157 x = ( x >> 8 ) | ( x << 8);
1158
1159 return x;
1160}
1161
1162ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1163ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1164{
1165 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1166 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1167 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1168 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1169 x = ( x >> 16 ) | ( x << 16);
1170
1171 return x;
1172}
1173
1174/* popcount64 is only available on 64 bit cpus as gcc builtin */
1175/* so for this version we are lazy */
1176ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1177ecb_function_ ecb_const int
1178ecb_popcount64 (uint64_t x)
1179{
1180 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1181}
1182
1183ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1184ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1185ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1186ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1187ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1188ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1189ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1190ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1191
1192ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1193ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1194ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1195ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1196ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1197ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1198ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1199ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1200
1201#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1202 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1203 #define ecb_bswap16(x) __builtin_bswap16 (x)
1204 #else
1205 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1206 #endif
1207 #define ecb_bswap32(x) __builtin_bswap32 (x)
1208 #define ecb_bswap64(x) __builtin_bswap64 (x)
1209#elif _MSC_VER
1210 #include <stdlib.h>
1211 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1212 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1213 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1214#else
1215 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1216 ecb_function_ ecb_const uint16_t
1217 ecb_bswap16 (uint16_t x)
1218 {
1219 return ecb_rotl16 (x, 8);
1220 }
1221
1222 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1223 ecb_function_ ecb_const uint32_t
1224 ecb_bswap32 (uint32_t x)
1225 {
1226 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1227 }
1228
1229 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1230 ecb_function_ ecb_const uint64_t
1231 ecb_bswap64 (uint64_t x)
1232 {
1233 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1234 }
1235#endif
1236
1237#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1238 #define ecb_unreachable() __builtin_unreachable ()
1239#else
1240 /* this seems to work fine, but gcc always emits a warning for it :/ */
1241 ecb_inline ecb_noreturn void ecb_unreachable (void);
1242 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1243#endif
1244
1245/* try to tell the compiler that some condition is definitely true */
1246#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1247
1248ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1249ecb_inline ecb_const uint32_t
1250ecb_byteorder_helper (void)
1251{
1252 /* the union code still generates code under pressure in gcc, */
1253 /* but less than using pointers, and always seems to */
1254 /* successfully return a constant. */
1255 /* the reason why we have this horrible preprocessor mess */
1256 /* is to avoid it in all cases, at least on common architectures */
1257 /* or when using a recent enough gcc version (>= 4.6) */
1258#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1259 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1260 #define ECB_LITTLE_ENDIAN 1
1261 return 0x44332211;
1262#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1263 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1264 #define ECB_BIG_ENDIAN 1
1265 return 0x11223344;
1266#else
1267 union
1268 {
1269 uint8_t c[4];
1270 uint32_t u;
1271 } u = { 0x11, 0x22, 0x33, 0x44 };
1272 return u.u;
1273#endif
1274}
1275
1276ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1277ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1278ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1279ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1280
1281#if ECB_GCC_VERSION(3,0) || ECB_C99
1282 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1283#else
1284 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1285#endif
1286
1287#if ECB_CPP
1288 template<typename T>
1289 static inline T ecb_div_rd (T val, T div)
1290 {
1291 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1292 }
1293 template<typename T>
1294 static inline T ecb_div_ru (T val, T div)
1295 {
1296 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1297 }
1298#else
1299 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1300 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1301#endif
1302
1303#if ecb_cplusplus_does_not_suck
1304 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1305 template<typename T, int N>
1306 static inline int ecb_array_length (const T (&arr)[N])
1307 {
1308 return N;
1309 }
1310#else
1311 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1312#endif
1313
1314ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1315ecb_function_ ecb_const uint32_t
1316ecb_binary16_to_binary32 (uint32_t x)
1317{
1318 unsigned int s = (x & 0x8000) << (31 - 15);
1319 int e = (x >> 10) & 0x001f;
1320 unsigned int m = x & 0x03ff;
1321
1322 if (ecb_expect_false (e == 31))
1323 /* infinity or NaN */
1324 e = 255 - (127 - 15);
1325 else if (ecb_expect_false (!e))
1326 {
1327 if (ecb_expect_true (!m))
1328 /* zero, handled by code below by forcing e to 0 */
1329 e = 0 - (127 - 15);
1330 else
1331 {
1332 /* subnormal, renormalise */
1333 unsigned int s = 10 - ecb_ld32 (m);
1334
1335 m = (m << s) & 0x3ff; /* mask implicit bit */
1336 e -= s - 1;
1337 }
1338 }
1339
1340 /* e and m now are normalised, or zero, (or inf or nan) */
1341 e += 127 - 15;
1342
1343 return s | (e << 23) | (m << (23 - 10));
1344}
1345
1346ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1347ecb_function_ ecb_const uint16_t
1348ecb_binary32_to_binary16 (uint32_t x)
1349{
1350 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1351 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1352 unsigned int m = x & 0x007fffff;
1353
1354 x &= 0x7fffffff;
1355
1356 /* if it's within range of binary16 normals, use fast path */
1357 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1358 {
1359 /* mantissa round-to-even */
1360 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1361
1362 /* handle overflow */
1363 if (ecb_expect_false (m >= 0x00800000))
1364 {
1365 m >>= 1;
1366 e += 1;
1367 }
1368
1369 return s | (e << 10) | (m >> (23 - 10));
1370 }
1371
1372 /* handle large numbers and infinity */
1373 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1374 return s | 0x7c00;
1375
1376 /* handle zero, subnormals and small numbers */
1377 if (ecb_expect_true (x < 0x38800000))
1378 {
1379 /* zero */
1380 if (ecb_expect_true (!x))
1381 return s;
1382
1383 /* handle subnormals */
1384
1385 /* too small, will be zero */
1386 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1387 return s;
1388
1389 m |= 0x00800000; /* make implicit bit explicit */
1390
1391 /* very tricky - we need to round to the nearest e (+10) bit value */
1392 {
1393 unsigned int bits = 14 - e;
1394 unsigned int half = (1 << (bits - 1)) - 1;
1395 unsigned int even = (m >> bits) & 1;
1396
1397 /* if this overflows, we will end up with a normalised number */
1398 m = (m + half + even) >> bits;
1399 }
1400
1401 return s | m;
1402 }
1403
1404 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1405 m >>= 13;
1406
1407 return s | 0x7c00 | m | !m;
1408}
1409
1410/*******************************************************************************/
1411/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1412
1413/* basically, everything uses "ieee pure-endian" floating point numbers */
1414/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1415#if 0 \
1416 || __i386 || __i386__ \
1417 || ECB_GCC_AMD64 \
1418 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1419 || defined __s390__ || defined __s390x__ \
1420 || defined __mips__ \
1421 || defined __alpha__ \
1422 || defined __hppa__ \
1423 || defined __ia64__ \
1424 || defined __m68k__ \
1425 || defined __m88k__ \
1426 || defined __sh__ \
1427 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1428 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1429 || defined __aarch64__
1430 #define ECB_STDFP 1
1431 #include <string.h> /* for memcpy */
1432#else
1433 #define ECB_STDFP 0
1434#endif
1435
1436#ifndef ECB_NO_LIBM
1437
1438 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1439
1440 /* only the oldest of old doesn't have this one. solaris. */
1441 #ifdef INFINITY
1442 #define ECB_INFINITY INFINITY
1443 #else
1444 #define ECB_INFINITY HUGE_VAL
1445 #endif
1446
1447 #ifdef NAN
1448 #define ECB_NAN NAN
1449 #else
1450 #define ECB_NAN ECB_INFINITY
1451 #endif
1452
1453 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1454 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1455 #define ecb_frexpf(x,e) frexpf ((x), (e))
1456 #else
1457 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1458 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1459 #endif
1460
1461 /* convert a float to ieee single/binary32 */
1462 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1463 ecb_function_ ecb_const uint32_t
1464 ecb_float_to_binary32 (float x)
1465 {
1466 uint32_t r;
1467
1468 #if ECB_STDFP
1469 memcpy (&r, &x, 4);
1470 #else
1471 /* slow emulation, works for anything but -0 */
1472 uint32_t m;
1473 int e;
1474
1475 if (x == 0e0f ) return 0x00000000U;
1476 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1477 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1478 if (x != x ) return 0x7fbfffffU;
1479
1480 m = ecb_frexpf (x, &e) * 0x1000000U;
1481
1482 r = m & 0x80000000U;
1483
1484 if (r)
1485 m = -m;
1486
1487 if (e <= -126)
1488 {
1489 m &= 0xffffffU;
1490 m >>= (-125 - e);
1491 e = -126;
1492 }
1493
1494 r |= (e + 126) << 23;
1495 r |= m & 0x7fffffU;
1496 #endif
1497
1498 return r;
1499 }
1500
1501 /* converts an ieee single/binary32 to a float */
1502 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1503 ecb_function_ ecb_const float
1504 ecb_binary32_to_float (uint32_t x)
1505 {
1506 float r;
1507
1508 #if ECB_STDFP
1509 memcpy (&r, &x, 4);
1510 #else
1511 /* emulation, only works for normals and subnormals and +0 */
1512 int neg = x >> 31;
1513 int e = (x >> 23) & 0xffU;
1514
1515 x &= 0x7fffffU;
1516
1517 if (e)
1518 x |= 0x800000U;
1519 else
1520 e = 1;
1521
1522 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1523 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1524
1525 r = neg ? -r : r;
1526 #endif
1527
1528 return r;
1529 }
1530
1531 /* convert a double to ieee double/binary64 */
1532 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1533 ecb_function_ ecb_const uint64_t
1534 ecb_double_to_binary64 (double x)
1535 {
1536 uint64_t r;
1537
1538 #if ECB_STDFP
1539 memcpy (&r, &x, 8);
1540 #else
1541 /* slow emulation, works for anything but -0 */
1542 uint64_t m;
1543 int e;
1544
1545 if (x == 0e0 ) return 0x0000000000000000U;
1546 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1547 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1548 if (x != x ) return 0X7ff7ffffffffffffU;
1549
1550 m = frexp (x, &e) * 0x20000000000000U;
1551
1552 r = m & 0x8000000000000000;;
1553
1554 if (r)
1555 m = -m;
1556
1557 if (e <= -1022)
1558 {
1559 m &= 0x1fffffffffffffU;
1560 m >>= (-1021 - e);
1561 e = -1022;
1562 }
1563
1564 r |= ((uint64_t)(e + 1022)) << 52;
1565 r |= m & 0xfffffffffffffU;
1566 #endif
1567
1568 return r;
1569 }
1570
1571 /* converts an ieee double/binary64 to a double */
1572 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1573 ecb_function_ ecb_const double
1574 ecb_binary64_to_double (uint64_t x)
1575 {
1576 double r;
1577
1578 #if ECB_STDFP
1579 memcpy (&r, &x, 8);
1580 #else
1581 /* emulation, only works for normals and subnormals and +0 */
1582 int neg = x >> 63;
1583 int e = (x >> 52) & 0x7ffU;
1584
1585 x &= 0xfffffffffffffU;
1586
1587 if (e)
1588 x |= 0x10000000000000U;
1589 else
1590 e = 1;
1591
1592 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1593 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1594
1595 r = neg ? -r : r;
1596 #endif
1597
1598 return r;
1599 }
1600
1601 /* convert a float to ieee half/binary16 */
1602 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1603 ecb_function_ ecb_const uint16_t
1604 ecb_float_to_binary16 (float x)
1605 {
1606 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1607 }
1608
1609 /* convert an ieee half/binary16 to float */
1610 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1611 ecb_function_ ecb_const float
1612 ecb_binary16_to_float (uint16_t x)
1613 {
1614 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1615 }
1616
1617#endif
1618
1619#endif
1620
1621/* ECB.H END */
1622
1623#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1624/* if your architecture doesn't need memory fences, e.g. because it is
1625 * single-cpu/core, or if you use libev in a project that doesn't use libev
1626 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1627 * libev, in which cases the memory fences become nops.
1628 * alternatively, you can remove this #error and link against libpthread,
1629 * which will then provide the memory fences.
1630 */
1631# error "memory fences not defined for your architecture, please report"
1632#endif
1633
1634#ifndef ECB_MEMORY_FENCE
1635# define ECB_MEMORY_FENCE do { } while (0)
1636# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1637# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1638#endif
1639
1640#define inline_size ecb_inline
1641
1642#if EV_FEATURE_CODE
482# define inline_speed static inline 1643# define inline_speed ecb_inline
1644#else
1645# define inline_speed ecb_noinline static
483#endif 1646#endif
1647
1648/*****************************************************************************/
1649/* raw syscall wrappers */
1650
1651#if EV_NEED_SYSCALL
1652
1653#include <sys/syscall.h>
1654
1655/*
1656 * define some syscall wrappers for common architectures
1657 * this is mostly for nice looks during debugging, not performance.
1658 * our syscalls return < 0, not == -1, on error. which is good
1659 * enough for linux aio.
1660 * TODO: arm is also common nowadays, maybe even mips and x86
1661 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1662 */
1663#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1664 /* the costly errno access probably kills this for size optimisation */
1665
1666 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1667 ({ \
1668 long res; \
1669 register unsigned long r6 __asm__ ("r9" ); \
1670 register unsigned long r5 __asm__ ("r8" ); \
1671 register unsigned long r4 __asm__ ("r10"); \
1672 register unsigned long r3 __asm__ ("rdx"); \
1673 register unsigned long r2 __asm__ ("rsi"); \
1674 register unsigned long r1 __asm__ ("rdi"); \
1675 if (narg >= 6) r6 = (unsigned long)(arg6); \
1676 if (narg >= 5) r5 = (unsigned long)(arg5); \
1677 if (narg >= 4) r4 = (unsigned long)(arg4); \
1678 if (narg >= 3) r3 = (unsigned long)(arg3); \
1679 if (narg >= 2) r2 = (unsigned long)(arg2); \
1680 if (narg >= 1) r1 = (unsigned long)(arg1); \
1681 __asm__ __volatile__ ( \
1682 "syscall\n\t" \
1683 : "=a" (res) \
1684 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1685 : "cc", "r11", "cx", "memory"); \
1686 errno = -res; \
1687 res; \
1688 })
1689
1690#endif
1691
1692#ifdef ev_syscall
1693 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1694 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1695 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1696 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1697 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1698 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1699 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1700#else
1701 #define ev_syscall0(nr) syscall (nr)
1702 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1703 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1704 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1705 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1706 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1707 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1708#endif
1709
1710#endif
1711
1712/*****************************************************************************/
484 1713
485#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1714#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
486 1715
487#if EV_MINPRI == EV_MAXPRI 1716#if EV_MINPRI == EV_MAXPRI
488# define ABSPRI(w) (((W)w), 0) 1717# define ABSPRI(w) (((W)w), 0)
489#else 1718#else
490# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1719# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
491#endif 1720#endif
492 1721
493#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1722#define EMPTY /* required for microsofts broken pseudo-c compiler */
494#define EMPTY2(a,b) /* used to suppress some warnings */
495 1723
496typedef ev_watcher *W; 1724typedef ev_watcher *W;
497typedef ev_watcher_list *WL; 1725typedef ev_watcher_list *WL;
498typedef ev_watcher_time *WT; 1726typedef ev_watcher_time *WT;
499 1727
500#define ev_active(w) ((W)(w))->active 1728#define ev_active(w) ((W)(w))->active
501#define ev_at(w) ((WT)(w))->at 1729#define ev_at(w) ((WT)(w))->at
502 1730
503#if EV_USE_REALTIME 1731#if EV_USE_REALTIME
504/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1732/* sig_atomic_t is used to avoid per-thread variables or locking but still */
505/* giving it a reasonably high chance of working on typical architetcures */ 1733/* giving it a reasonably high chance of working on typical architectures */
506static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1734static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
507#endif 1735#endif
508 1736
509#if EV_USE_MONOTONIC 1737#if EV_USE_MONOTONIC
510static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1738static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
524# include "ev_win32.c" 1752# include "ev_win32.c"
525#endif 1753#endif
526 1754
527/*****************************************************************************/ 1755/*****************************************************************************/
528 1756
1757#if EV_USE_LINUXAIO
1758# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1759#endif
1760
1761/* define a suitable floor function (only used by periodics atm) */
1762
1763#if EV_USE_FLOOR
1764# include <math.h>
1765# define ev_floor(v) floor (v)
1766#else
1767
1768#include <float.h>
1769
1770/* a floor() replacement function, should be independent of ev_tstamp type */
1771ecb_noinline
1772static ev_tstamp
1773ev_floor (ev_tstamp v)
1774{
1775 /* the choice of shift factor is not terribly important */
1776#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1777 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1778#else
1779 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1780#endif
1781
1782 /* special treatment for negative arguments */
1783 if (ecb_expect_false (v < 0.))
1784 {
1785 ev_tstamp f = -ev_floor (-v);
1786
1787 return f - (f == v ? 0 : 1);
1788 }
1789
1790 /* argument too large for an unsigned long? then reduce it */
1791 if (ecb_expect_false (v >= shift))
1792 {
1793 ev_tstamp f;
1794
1795 if (v == v - 1.)
1796 return v; /* very large numbers are assumed to be integer */
1797
1798 f = shift * ev_floor (v * (1. / shift));
1799 return f + ev_floor (v - f);
1800 }
1801
1802 /* fits into an unsigned long */
1803 return (unsigned long)v;
1804}
1805
1806#endif
1807
1808/*****************************************************************************/
1809
1810#ifdef __linux
1811# include <sys/utsname.h>
1812#endif
1813
1814ecb_noinline ecb_cold
1815static unsigned int
1816ev_linux_version (void)
1817{
1818#ifdef __linux
1819 unsigned int v = 0;
1820 struct utsname buf;
1821 int i;
1822 char *p = buf.release;
1823
1824 if (uname (&buf))
1825 return 0;
1826
1827 for (i = 3+1; --i; )
1828 {
1829 unsigned int c = 0;
1830
1831 for (;;)
1832 {
1833 if (*p >= '0' && *p <= '9')
1834 c = c * 10 + *p++ - '0';
1835 else
1836 {
1837 p += *p == '.';
1838 break;
1839 }
1840 }
1841
1842 v = (v << 8) | c;
1843 }
1844
1845 return v;
1846#else
1847 return 0;
1848#endif
1849}
1850
1851/*****************************************************************************/
1852
1853#if EV_AVOID_STDIO
1854ecb_noinline ecb_cold
1855static void
1856ev_printerr (const char *msg)
1857{
1858 write (STDERR_FILENO, msg, strlen (msg));
1859}
1860#endif
1861
529static void (*syserr_cb)(const char *msg); 1862static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
530 1863
1864ecb_cold
531void 1865void
532ev_set_syserr_cb (void (*cb)(const char *msg)) 1866ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
533{ 1867{
534 syserr_cb = cb; 1868 syserr_cb = cb;
535} 1869}
536 1870
537static void noinline 1871ecb_noinline ecb_cold
1872static void
538ev_syserr (const char *msg) 1873ev_syserr (const char *msg)
539{ 1874{
540 if (!msg) 1875 if (!msg)
541 msg = "(libev) system error"; 1876 msg = "(libev) system error";
542 1877
543 if (syserr_cb) 1878 if (syserr_cb)
544 syserr_cb (msg); 1879 syserr_cb (msg);
545 else 1880 else
546 { 1881 {
547#if EV_AVOID_STDIO 1882#if EV_AVOID_STDIO
548 write (STDERR_FILENO, msg, strlen (msg)); 1883 ev_printerr (msg);
549 write (STDERR_FILENO, ": ", 2); 1884 ev_printerr (": ");
550 msg = strerror (errno); 1885 ev_printerr (strerror (errno));
551 write (STDERR_FILENO, msg, strlen (msg)); 1886 ev_printerr ("\n");
552 write (STDERR_FILENO, "\n", 1);
553#else 1887#else
554 perror (msg); 1888 perror (msg);
555#endif 1889#endif
556 abort (); 1890 abort ();
557 } 1891 }
558} 1892}
559 1893
560static void * 1894static void *
561ev_realloc_emul (void *ptr, long size) 1895ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
562{ 1896{
563 /* some systems, notably openbsd and darwin, fail to properly 1897 /* some systems, notably openbsd and darwin, fail to properly
564 * implement realloc (x, 0) (as required by both ansi c-98 and 1898 * implement realloc (x, 0) (as required by both ansi c-89 and
565 * the single unix specification, so work around them here. 1899 * the single unix specification, so work around them here.
1900 * recently, also (at least) fedora and debian started breaking it,
1901 * despite documenting it otherwise.
566 */ 1902 */
567 1903
568 if (size) 1904 if (size)
569 return realloc (ptr, size); 1905 return realloc (ptr, size);
570 1906
571 free (ptr); 1907 free (ptr);
572 return 0; 1908 return 0;
573} 1909}
574 1910
575static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1911static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
576 1912
1913ecb_cold
577void 1914void
578ev_set_allocator (void *(*cb)(void *ptr, long size)) 1915ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
579{ 1916{
580 alloc = cb; 1917 alloc = cb;
581} 1918}
582 1919
583inline_speed void * 1920inline_speed void *
… …
586 ptr = alloc (ptr, size); 1923 ptr = alloc (ptr, size);
587 1924
588 if (!ptr && size) 1925 if (!ptr && size)
589 { 1926 {
590#if EV_AVOID_STDIO 1927#if EV_AVOID_STDIO
591 write (STDERR_FILENO, "libev: memory allocation failed, aborting.", 1928 ev_printerr ("(libev) memory allocation failed, aborting.\n");
592 sizeof ("libev: memory allocation failed, aborting.") - 1);
593#else 1929#else
594 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1930 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
595#endif 1931#endif
596 abort (); 1932 abort ();
597 } 1933 }
598 1934
599 return ptr; 1935 return ptr;
… …
611typedef struct 1947typedef struct
612{ 1948{
613 WL head; 1949 WL head;
614 unsigned char events; /* the events watched for */ 1950 unsigned char events; /* the events watched for */
615 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1951 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
616 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1952 unsigned char emask; /* some backends store the actual kernel mask in here */
617 unsigned char unused; 1953 unsigned char eflags; /* flags field for use by backends */
618#if EV_USE_EPOLL 1954#if EV_USE_EPOLL
619 unsigned int egen; /* generation counter to counter epoll bugs */ 1955 unsigned int egen; /* generation counter to counter epoll bugs */
620#endif 1956#endif
621#if EV_SELECT_IS_WINSOCKET 1957#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
622 SOCKET handle; 1958 SOCKET handle;
1959#endif
1960#if EV_USE_IOCP
1961 OVERLAPPED or, ow;
623#endif 1962#endif
624} ANFD; 1963} ANFD;
625 1964
626/* stores the pending event set for a given watcher */ 1965/* stores the pending event set for a given watcher */
627typedef struct 1966typedef struct
… …
669 #undef VAR 2008 #undef VAR
670 }; 2009 };
671 #include "ev_wrap.h" 2010 #include "ev_wrap.h"
672 2011
673 static struct ev_loop default_loop_struct; 2012 static struct ev_loop default_loop_struct;
674 struct ev_loop *ev_default_loop_ptr; 2013 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
675 2014
676#else 2015#else
677 2016
678 ev_tstamp ev_rt_now; 2017 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
679 #define VAR(name,decl) static decl; 2018 #define VAR(name,decl) static decl;
680 #include "ev_vars.h" 2019 #include "ev_vars.h"
681 #undef VAR 2020 #undef VAR
682 2021
683 static int ev_default_loop_ptr; 2022 static int ev_default_loop_ptr;
684 2023
685#endif 2024#endif
686 2025
687#if EV_MINIMAL < 2 2026#if EV_FEATURE_API
688# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 2027# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
689# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 2028# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
690# define EV_INVOKE_PENDING invoke_cb (EV_A) 2029# define EV_INVOKE_PENDING invoke_cb (EV_A)
691#else 2030#else
692# define EV_RELEASE_CB (void)0 2031# define EV_RELEASE_CB (void)0
693# define EV_ACQUIRE_CB (void)0 2032# define EV_ACQUIRE_CB (void)0
694# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2033# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
695#endif 2034#endif
696 2035
697#define EVUNLOOP_RECURSE 0x80 2036#define EVBREAK_RECURSE 0x80
698 2037
699/*****************************************************************************/ 2038/*****************************************************************************/
700 2039
701#ifndef EV_HAVE_EV_TIME 2040#ifndef EV_HAVE_EV_TIME
702ev_tstamp 2041ev_tstamp
703ev_time (void) 2042ev_time (void) EV_NOEXCEPT
704{ 2043{
705#if EV_USE_REALTIME 2044#if EV_USE_REALTIME
706 if (expect_true (have_realtime)) 2045 if (ecb_expect_true (have_realtime))
707 { 2046 {
708 struct timespec ts; 2047 struct timespec ts;
709 clock_gettime (CLOCK_REALTIME, &ts); 2048 clock_gettime (CLOCK_REALTIME, &ts);
710 return ts.tv_sec + ts.tv_nsec * 1e-9; 2049 return EV_TS_GET (ts);
711 } 2050 }
712#endif 2051#endif
713 2052
2053 {
714 struct timeval tv; 2054 struct timeval tv;
715 gettimeofday (&tv, 0); 2055 gettimeofday (&tv, 0);
716 return tv.tv_sec + tv.tv_usec * 1e-6; 2056 return EV_TV_GET (tv);
2057 }
717} 2058}
718#endif 2059#endif
719 2060
720inline_size ev_tstamp 2061inline_size ev_tstamp
721get_clock (void) 2062get_clock (void)
722{ 2063{
723#if EV_USE_MONOTONIC 2064#if EV_USE_MONOTONIC
724 if (expect_true (have_monotonic)) 2065 if (ecb_expect_true (have_monotonic))
725 { 2066 {
726 struct timespec ts; 2067 struct timespec ts;
727 clock_gettime (CLOCK_MONOTONIC, &ts); 2068 clock_gettime (CLOCK_MONOTONIC, &ts);
728 return ts.tv_sec + ts.tv_nsec * 1e-9; 2069 return EV_TS_GET (ts);
729 } 2070 }
730#endif 2071#endif
731 2072
732 return ev_time (); 2073 return ev_time ();
733} 2074}
734 2075
735#if EV_MULTIPLICITY 2076#if EV_MULTIPLICITY
736ev_tstamp 2077ev_tstamp
737ev_now (EV_P) 2078ev_now (EV_P) EV_NOEXCEPT
738{ 2079{
739 return ev_rt_now; 2080 return ev_rt_now;
740} 2081}
741#endif 2082#endif
742 2083
743void 2084void
744ev_sleep (ev_tstamp delay) 2085ev_sleep (ev_tstamp delay) EV_NOEXCEPT
745{ 2086{
746 if (delay > 0.) 2087 if (delay > EV_TS_CONST (0.))
747 { 2088 {
748#if EV_USE_NANOSLEEP 2089#if EV_USE_NANOSLEEP
749 struct timespec ts; 2090 struct timespec ts;
750 2091
751 ts.tv_sec = (time_t)delay; 2092 EV_TS_SET (ts, delay);
752 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
753
754 nanosleep (&ts, 0); 2093 nanosleep (&ts, 0);
755#elif defined(_WIN32) 2094#elif defined _WIN32
2095 /* maybe this should round up, as ms is very low resolution */
2096 /* compared to select (µs) or nanosleep (ns) */
756 Sleep ((unsigned long)(delay * 1e3)); 2097 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
757#else 2098#else
758 struct timeval tv; 2099 struct timeval tv;
759
760 tv.tv_sec = (time_t)delay;
761 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
762 2100
763 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2101 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
764 /* something not guaranteed by newer posix versions, but guaranteed */ 2102 /* something not guaranteed by newer posix versions, but guaranteed */
765 /* by older ones */ 2103 /* by older ones */
2104 EV_TV_SET (tv, delay);
766 select (0, 0, 0, 0, &tv); 2105 select (0, 0, 0, 0, &tv);
767#endif 2106#endif
768 } 2107 }
769} 2108}
770 2109
771/*****************************************************************************/ 2110/*****************************************************************************/
772 2111
773#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 2112#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
774 2113
775/* find a suitable new size for the given array, */ 2114/* find a suitable new size for the given array, */
776/* hopefully by rounding to a ncie-to-malloc size */ 2115/* hopefully by rounding to a nice-to-malloc size */
777inline_size int 2116inline_size int
778array_nextsize (int elem, int cur, int cnt) 2117array_nextsize (int elem, int cur, int cnt)
779{ 2118{
780 int ncur = cur + 1; 2119 int ncur = cur + 1;
781 2120
782 do 2121 do
783 ncur <<= 1; 2122 ncur <<= 1;
784 while (cnt > ncur); 2123 while (cnt > ncur);
785 2124
786 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 2125 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
787 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2126 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
788 { 2127 {
789 ncur *= elem; 2128 ncur *= elem;
790 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 2129 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
791 ncur = ncur - sizeof (void *) * 4; 2130 ncur = ncur - sizeof (void *) * 4;
… …
793 } 2132 }
794 2133
795 return ncur; 2134 return ncur;
796} 2135}
797 2136
798static noinline void * 2137ecb_noinline ecb_cold
2138static void *
799array_realloc (int elem, void *base, int *cur, int cnt) 2139array_realloc (int elem, void *base, int *cur, int cnt)
800{ 2140{
801 *cur = array_nextsize (elem, *cur, cnt); 2141 *cur = array_nextsize (elem, *cur, cnt);
802 return ev_realloc (base, elem * *cur); 2142 return ev_realloc (base, elem * *cur);
803} 2143}
804 2144
2145#define array_needsize_noinit(base,offset,count)
2146
805#define array_init_zero(base,count) \ 2147#define array_needsize_zerofill(base,offset,count) \
806 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2148 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
807 2149
808#define array_needsize(type,base,cur,cnt,init) \ 2150#define array_needsize(type,base,cur,cnt,init) \
809 if (expect_false ((cnt) > (cur))) \ 2151 if (ecb_expect_false ((cnt) > (cur))) \
810 { \ 2152 { \
811 int ocur_ = (cur); \ 2153 ecb_unused int ocur_ = (cur); \
812 (base) = (type *)array_realloc \ 2154 (base) = (type *)array_realloc \
813 (sizeof (type), (base), &(cur), (cnt)); \ 2155 (sizeof (type), (base), &(cur), (cnt)); \
814 init ((base) + (ocur_), (cur) - ocur_); \ 2156 init ((base), ocur_, ((cur) - ocur_)); \
815 } 2157 }
816 2158
817#if 0 2159#if 0
818#define array_slim(type,stem) \ 2160#define array_slim(type,stem) \
819 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2161 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
828 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2170 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
829 2171
830/*****************************************************************************/ 2172/*****************************************************************************/
831 2173
832/* dummy callback for pending events */ 2174/* dummy callback for pending events */
833static void noinline 2175ecb_noinline
2176static void
834pendingcb (EV_P_ ev_prepare *w, int revents) 2177pendingcb (EV_P_ ev_prepare *w, int revents)
835{ 2178{
836} 2179}
837 2180
838void noinline 2181ecb_noinline
2182void
839ev_feed_event (EV_P_ void *w, int revents) 2183ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
840{ 2184{
841 W w_ = (W)w; 2185 W w_ = (W)w;
842 int pri = ABSPRI (w_); 2186 int pri = ABSPRI (w_);
843 2187
844 if (expect_false (w_->pending)) 2188 if (ecb_expect_false (w_->pending))
845 pendings [pri][w_->pending - 1].events |= revents; 2189 pendings [pri][w_->pending - 1].events |= revents;
846 else 2190 else
847 { 2191 {
848 w_->pending = ++pendingcnt [pri]; 2192 w_->pending = ++pendingcnt [pri];
849 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2193 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
850 pendings [pri][w_->pending - 1].w = w_; 2194 pendings [pri][w_->pending - 1].w = w_;
851 pendings [pri][w_->pending - 1].events = revents; 2195 pendings [pri][w_->pending - 1].events = revents;
852 } 2196 }
2197
2198 pendingpri = NUMPRI - 1;
853} 2199}
854 2200
855inline_speed void 2201inline_speed void
856feed_reverse (EV_P_ W w) 2202feed_reverse (EV_P_ W w)
857{ 2203{
858 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2204 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
859 rfeeds [rfeedcnt++] = w; 2205 rfeeds [rfeedcnt++] = w;
860} 2206}
861 2207
862inline_size void 2208inline_size void
863feed_reverse_done (EV_P_ int revents) 2209feed_reverse_done (EV_P_ int revents)
… …
877} 2223}
878 2224
879/*****************************************************************************/ 2225/*****************************************************************************/
880 2226
881inline_speed void 2227inline_speed void
882fd_event_nc (EV_P_ int fd, int revents) 2228fd_event_nocheck (EV_P_ int fd, int revents)
883{ 2229{
884 ANFD *anfd = anfds + fd; 2230 ANFD *anfd = anfds + fd;
885 ev_io *w; 2231 ev_io *w;
886 2232
887 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2233 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
898inline_speed void 2244inline_speed void
899fd_event (EV_P_ int fd, int revents) 2245fd_event (EV_P_ int fd, int revents)
900{ 2246{
901 ANFD *anfd = anfds + fd; 2247 ANFD *anfd = anfds + fd;
902 2248
903 if (expect_true (!anfd->reify)) 2249 if (ecb_expect_true (!anfd->reify))
904 fd_event_nc (EV_A_ fd, revents); 2250 fd_event_nocheck (EV_A_ fd, revents);
905} 2251}
906 2252
907void 2253void
908ev_feed_fd_event (EV_P_ int fd, int revents) 2254ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
909{ 2255{
910 if (fd >= 0 && fd < anfdmax) 2256 if (fd >= 0 && fd < anfdmax)
911 fd_event_nc (EV_A_ fd, revents); 2257 fd_event_nocheck (EV_A_ fd, revents);
912} 2258}
913 2259
914/* make sure the external fd watch events are in-sync */ 2260/* make sure the external fd watch events are in-sync */
915/* with the kernel/libev internal state */ 2261/* with the kernel/libev internal state */
916inline_size void 2262inline_size void
917fd_reify (EV_P) 2263fd_reify (EV_P)
918{ 2264{
919 int i; 2265 int i;
920 2266
2267 /* most backends do not modify the fdchanges list in backend_modfiy.
2268 * except io_uring, which has fixed-size buffers which might force us
2269 * to handle events in backend_modify, causing fdchangesd to be amended,
2270 * which could result in an endless loop.
2271 * to avoid this, we do not dynamically handle fds that were added
2272 * during fd_reify. that menas thast for those backends, fdchangecnt
2273 * might be non-zero during poll, which must cause them to not block.
2274 * to not put too much of a burden on other backends, this detail
2275 * needs to be handled in the backend.
2276 */
2277 int changecnt = fdchangecnt;
2278
2279#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
921 for (i = 0; i < fdchangecnt; ++i) 2280 for (i = 0; i < changecnt; ++i)
2281 {
2282 int fd = fdchanges [i];
2283 ANFD *anfd = anfds + fd;
2284
2285 if (anfd->reify & EV__IOFDSET && anfd->head)
2286 {
2287 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2288
2289 if (handle != anfd->handle)
2290 {
2291 unsigned long arg;
2292
2293 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2294
2295 /* handle changed, but fd didn't - we need to do it in two steps */
2296 backend_modify (EV_A_ fd, anfd->events, 0);
2297 anfd->events = 0;
2298 anfd->handle = handle;
2299 }
2300 }
2301 }
2302#endif
2303
2304 for (i = 0; i < changecnt; ++i)
922 { 2305 {
923 int fd = fdchanges [i]; 2306 int fd = fdchanges [i];
924 ANFD *anfd = anfds + fd; 2307 ANFD *anfd = anfds + fd;
925 ev_io *w; 2308 ev_io *w;
926 2309
927 unsigned char events = 0; 2310 unsigned char o_events = anfd->events;
2311 unsigned char o_reify = anfd->reify;
928 2312
929 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2313 anfd->reify = 0;
930 events |= (unsigned char)w->events;
931 2314
932#if EV_SELECT_IS_WINSOCKET 2315 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
933 if (events)
934 { 2316 {
935 unsigned long arg; 2317 anfd->events = 0;
936 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2318
937 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2319 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2320 anfd->events |= (unsigned char)w->events;
2321
2322 if (o_events != anfd->events)
2323 o_reify = EV__IOFDSET; /* actually |= */
938 } 2324 }
939#endif
940 2325
941 { 2326 if (o_reify & EV__IOFDSET)
942 unsigned char o_events = anfd->events;
943 unsigned char o_reify = anfd->reify;
944
945 anfd->reify = 0;
946 anfd->events = events;
947
948 if (o_events != events || o_reify & EV__IOFDSET)
949 backend_modify (EV_A_ fd, o_events, events); 2327 backend_modify (EV_A_ fd, o_events, anfd->events);
950 } 2328 }
951 }
952 2329
2330 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2331 * this is a rare case (see beginning comment in this function), so we copy them to the
2332 * front and hope the backend handles this case.
2333 */
2334 if (ecb_expect_false (fdchangecnt != changecnt))
2335 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2336
953 fdchangecnt = 0; 2337 fdchangecnt -= changecnt;
954} 2338}
955 2339
956/* something about the given fd changed */ 2340/* something about the given fd changed */
957inline_size void 2341inline_size
2342void
958fd_change (EV_P_ int fd, int flags) 2343fd_change (EV_P_ int fd, int flags)
959{ 2344{
960 unsigned char reify = anfds [fd].reify; 2345 unsigned char reify = anfds [fd].reify;
961 anfds [fd].reify |= flags; 2346 anfds [fd].reify |= flags;
962 2347
963 if (expect_true (!reify)) 2348 if (ecb_expect_true (!reify))
964 { 2349 {
965 ++fdchangecnt; 2350 ++fdchangecnt;
966 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2351 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
967 fdchanges [fdchangecnt - 1] = fd; 2352 fdchanges [fdchangecnt - 1] = fd;
968 } 2353 }
969} 2354}
970 2355
971/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2356/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
972inline_speed void 2357inline_speed ecb_cold void
973fd_kill (EV_P_ int fd) 2358fd_kill (EV_P_ int fd)
974{ 2359{
975 ev_io *w; 2360 ev_io *w;
976 2361
977 while ((w = (ev_io *)anfds [fd].head)) 2362 while ((w = (ev_io *)anfds [fd].head))
… …
979 ev_io_stop (EV_A_ w); 2364 ev_io_stop (EV_A_ w);
980 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2365 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
981 } 2366 }
982} 2367}
983 2368
984/* check whether the given fd is atcually valid, for error recovery */ 2369/* check whether the given fd is actually valid, for error recovery */
985inline_size int 2370inline_size ecb_cold int
986fd_valid (int fd) 2371fd_valid (int fd)
987{ 2372{
988#ifdef _WIN32 2373#ifdef _WIN32
989 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2374 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
990#else 2375#else
991 return fcntl (fd, F_GETFD) != -1; 2376 return fcntl (fd, F_GETFD) != -1;
992#endif 2377#endif
993} 2378}
994 2379
995/* called on EBADF to verify fds */ 2380/* called on EBADF to verify fds */
996static void noinline 2381ecb_noinline ecb_cold
2382static void
997fd_ebadf (EV_P) 2383fd_ebadf (EV_P)
998{ 2384{
999 int fd; 2385 int fd;
1000 2386
1001 for (fd = 0; fd < anfdmax; ++fd) 2387 for (fd = 0; fd < anfdmax; ++fd)
… …
1003 if (!fd_valid (fd) && errno == EBADF) 2389 if (!fd_valid (fd) && errno == EBADF)
1004 fd_kill (EV_A_ fd); 2390 fd_kill (EV_A_ fd);
1005} 2391}
1006 2392
1007/* called on ENOMEM in select/poll to kill some fds and retry */ 2393/* called on ENOMEM in select/poll to kill some fds and retry */
1008static void noinline 2394ecb_noinline ecb_cold
2395static void
1009fd_enomem (EV_P) 2396fd_enomem (EV_P)
1010{ 2397{
1011 int fd; 2398 int fd;
1012 2399
1013 for (fd = anfdmax; fd--; ) 2400 for (fd = anfdmax; fd--; )
… …
1017 break; 2404 break;
1018 } 2405 }
1019} 2406}
1020 2407
1021/* usually called after fork if backend needs to re-arm all fds from scratch */ 2408/* usually called after fork if backend needs to re-arm all fds from scratch */
1022static void noinline 2409ecb_noinline
2410static void
1023fd_rearm_all (EV_P) 2411fd_rearm_all (EV_P)
1024{ 2412{
1025 int fd; 2413 int fd;
1026 2414
1027 for (fd = 0; fd < anfdmax; ++fd) 2415 for (fd = 0; fd < anfdmax; ++fd)
… …
1031 anfds [fd].emask = 0; 2419 anfds [fd].emask = 0;
1032 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 2420 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1033 } 2421 }
1034} 2422}
1035 2423
2424/* used to prepare libev internal fd's */
2425/* this is not fork-safe */
2426inline_speed void
2427fd_intern (int fd)
2428{
2429#ifdef _WIN32
2430 unsigned long arg = 1;
2431 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2432#else
2433 fcntl (fd, F_SETFD, FD_CLOEXEC);
2434 fcntl (fd, F_SETFL, O_NONBLOCK);
2435#endif
2436}
2437
1036/*****************************************************************************/ 2438/*****************************************************************************/
1037 2439
1038/* 2440/*
1039 * the heap functions want a real array index. array index 0 uis guaranteed to not 2441 * the heap functions want a real array index. array index 0 is guaranteed to not
1040 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2442 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1041 * the branching factor of the d-tree. 2443 * the branching factor of the d-tree.
1042 */ 2444 */
1043 2445
1044/* 2446/*
… …
1066 ev_tstamp minat; 2468 ev_tstamp minat;
1067 ANHE *minpos; 2469 ANHE *minpos;
1068 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2470 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1069 2471
1070 /* find minimum child */ 2472 /* find minimum child */
1071 if (expect_true (pos + DHEAP - 1 < E)) 2473 if (ecb_expect_true (pos + DHEAP - 1 < E))
1072 { 2474 {
1073 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2475 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1074 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2476 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1075 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2477 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1076 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2478 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1077 } 2479 }
1078 else if (pos < E) 2480 else if (pos < E)
1079 { 2481 {
1080 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2482 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1081 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2483 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1082 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2484 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1083 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2485 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1084 } 2486 }
1085 else 2487 else
1086 break; 2488 break;
1087 2489
1088 if (ANHE_at (he) <= minat) 2490 if (ANHE_at (he) <= minat)
… …
1096 2498
1097 heap [k] = he; 2499 heap [k] = he;
1098 ev_active (ANHE_w (he)) = k; 2500 ev_active (ANHE_w (he)) = k;
1099} 2501}
1100 2502
1101#else /* 4HEAP */ 2503#else /* not 4HEAP */
1102 2504
1103#define HEAP0 1 2505#define HEAP0 1
1104#define HPARENT(k) ((k) >> 1) 2506#define HPARENT(k) ((k) >> 1)
1105#define UPHEAP_DONE(p,k) (!(p)) 2507#define UPHEAP_DONE(p,k) (!(p))
1106 2508
… …
1178 upheap (heap, i + HEAP0); 2580 upheap (heap, i + HEAP0);
1179} 2581}
1180 2582
1181/*****************************************************************************/ 2583/*****************************************************************************/
1182 2584
1183/* associate signal watchers to a signal signal */ 2585/* associate signal watchers to a signal */
1184typedef struct 2586typedef struct
1185{ 2587{
1186 EV_ATOMIC_T pending; 2588 EV_ATOMIC_T pending;
1187#if EV_MULTIPLICITY 2589#if EV_MULTIPLICITY
1188 EV_P; 2590 EV_P;
… …
1192 2594
1193static ANSIG signals [EV_NSIG - 1]; 2595static ANSIG signals [EV_NSIG - 1];
1194 2596
1195/*****************************************************************************/ 2597/*****************************************************************************/
1196 2598
1197/* used to prepare libev internal fd's */ 2599#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1198/* this is not fork-safe */ 2600
2601ecb_noinline ecb_cold
2602static void
2603evpipe_init (EV_P)
2604{
2605 if (!ev_is_active (&pipe_w))
2606 {
2607 int fds [2];
2608
2609# if EV_USE_EVENTFD
2610 fds [0] = -1;
2611 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2612 if (fds [1] < 0 && errno == EINVAL)
2613 fds [1] = eventfd (0, 0);
2614
2615 if (fds [1] < 0)
2616# endif
2617 {
2618 while (pipe (fds))
2619 ev_syserr ("(libev) error creating signal/async pipe");
2620
2621 fd_intern (fds [0]);
2622 }
2623
2624 evpipe [0] = fds [0];
2625
2626 if (evpipe [1] < 0)
2627 evpipe [1] = fds [1]; /* first call, set write fd */
2628 else
2629 {
2630 /* on subsequent calls, do not change evpipe [1] */
2631 /* so that evpipe_write can always rely on its value. */
2632 /* this branch does not do anything sensible on windows, */
2633 /* so must not be executed on windows */
2634
2635 dup2 (fds [1], evpipe [1]);
2636 close (fds [1]);
2637 }
2638
2639 fd_intern (evpipe [1]);
2640
2641 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2642 ev_io_start (EV_A_ &pipe_w);
2643 ev_unref (EV_A); /* watcher should not keep loop alive */
2644 }
2645}
2646
1199inline_speed void 2647inline_speed void
1200fd_intern (int fd) 2648evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1201{ 2649{
1202#ifdef _WIN32 2650 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1203 unsigned long arg = 1;
1204 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1205#else
1206 fcntl (fd, F_SETFD, FD_CLOEXEC);
1207 fcntl (fd, F_SETFL, O_NONBLOCK);
1208#endif
1209}
1210 2651
1211static void noinline 2652 if (ecb_expect_true (*flag))
1212evpipe_init (EV_P) 2653 return;
1213{ 2654
1214 if (!ev_is_active (&pipe_w)) 2655 *flag = 1;
2656 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2657
2658 pipe_write_skipped = 1;
2659
2660 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2661
2662 if (pipe_write_wanted)
1215 { 2663 {
2664 int old_errno;
2665
2666 pipe_write_skipped = 0;
2667 ECB_MEMORY_FENCE_RELEASE;
2668
2669 old_errno = errno; /* save errno because write will clobber it */
2670
1216#if EV_USE_EVENTFD 2671#if EV_USE_EVENTFD
1217 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2672 if (evpipe [0] < 0)
1218 if (evfd < 0 && errno == EINVAL)
1219 evfd = eventfd (0, 0);
1220
1221 if (evfd >= 0)
1222 { 2673 {
1223 evpipe [0] = -1; 2674 uint64_t counter = 1;
1224 fd_intern (evfd); /* doing it twice doesn't hurt */ 2675 write (evpipe [1], &counter, sizeof (uint64_t));
1225 ev_io_set (&pipe_w, evfd, EV_READ);
1226 } 2676 }
1227 else 2677 else
1228#endif 2678#endif
1229 { 2679 {
1230 while (pipe (evpipe)) 2680#ifdef _WIN32
1231 ev_syserr ("(libev) error creating signal/async pipe"); 2681 WSABUF buf;
1232 2682 DWORD sent;
1233 fd_intern (evpipe [0]); 2683 buf.buf = (char *)&buf;
1234 fd_intern (evpipe [1]); 2684 buf.len = 1;
1235 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2685 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2686#else
2687 write (evpipe [1], &(evpipe [1]), 1);
2688#endif
1236 } 2689 }
1237
1238 ev_io_start (EV_A_ &pipe_w);
1239 ev_unref (EV_A); /* watcher should not keep loop alive */
1240 }
1241}
1242
1243inline_size void
1244evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1245{
1246 if (!*flag)
1247 {
1248 int old_errno = errno; /* save errno because write might clobber it */
1249
1250 *flag = 1;
1251
1252#if EV_USE_EVENTFD
1253 if (evfd >= 0)
1254 {
1255 uint64_t counter = 1;
1256 write (evfd, &counter, sizeof (uint64_t));
1257 }
1258 else
1259#endif
1260 write (evpipe [1], &old_errno, 1);
1261 2690
1262 errno = old_errno; 2691 errno = old_errno;
1263 } 2692 }
1264} 2693}
1265 2694
… …
1268static void 2697static void
1269pipecb (EV_P_ ev_io *iow, int revents) 2698pipecb (EV_P_ ev_io *iow, int revents)
1270{ 2699{
1271 int i; 2700 int i;
1272 2701
2702 if (revents & EV_READ)
2703 {
1273#if EV_USE_EVENTFD 2704#if EV_USE_EVENTFD
1274 if (evfd >= 0) 2705 if (evpipe [0] < 0)
1275 { 2706 {
1276 uint64_t counter; 2707 uint64_t counter;
1277 read (evfd, &counter, sizeof (uint64_t)); 2708 read (evpipe [1], &counter, sizeof (uint64_t));
1278 } 2709 }
1279 else 2710 else
1280#endif 2711#endif
1281 { 2712 {
1282 char dummy; 2713 char dummy[4];
2714#ifdef _WIN32
2715 WSABUF buf;
2716 DWORD recvd;
2717 DWORD flags = 0;
2718 buf.buf = dummy;
2719 buf.len = sizeof (dummy);
2720 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2721#else
1283 read (evpipe [0], &dummy, 1); 2722 read (evpipe [0], &dummy, sizeof (dummy));
2723#endif
2724 }
1284 } 2725 }
1285 2726
2727 pipe_write_skipped = 0;
2728
2729 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2730
2731#if EV_SIGNAL_ENABLE
1286 if (sig_pending) 2732 if (sig_pending)
1287 { 2733 {
1288 sig_pending = 0; 2734 sig_pending = 0;
1289 2735
2736 ECB_MEMORY_FENCE;
2737
1290 for (i = EV_NSIG - 1; i--; ) 2738 for (i = EV_NSIG - 1; i--; )
1291 if (expect_false (signals [i].pending)) 2739 if (ecb_expect_false (signals [i].pending))
1292 ev_feed_signal_event (EV_A_ i + 1); 2740 ev_feed_signal_event (EV_A_ i + 1);
1293 } 2741 }
2742#endif
1294 2743
1295#if EV_ASYNC_ENABLE 2744#if EV_ASYNC_ENABLE
1296 if (async_pending) 2745 if (async_pending)
1297 { 2746 {
1298 async_pending = 0; 2747 async_pending = 0;
2748
2749 ECB_MEMORY_FENCE;
1299 2750
1300 for (i = asynccnt; i--; ) 2751 for (i = asynccnt; i--; )
1301 if (asyncs [i]->sent) 2752 if (asyncs [i]->sent)
1302 { 2753 {
1303 asyncs [i]->sent = 0; 2754 asyncs [i]->sent = 0;
2755 ECB_MEMORY_FENCE_RELEASE;
1304 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2756 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1305 } 2757 }
1306 } 2758 }
1307#endif 2759#endif
1308} 2760}
1309 2761
1310/*****************************************************************************/ 2762/*****************************************************************************/
1311 2763
2764void
2765ev_feed_signal (int signum) EV_NOEXCEPT
2766{
2767#if EV_MULTIPLICITY
2768 EV_P;
2769 ECB_MEMORY_FENCE_ACQUIRE;
2770 EV_A = signals [signum - 1].loop;
2771
2772 if (!EV_A)
2773 return;
2774#endif
2775
2776 signals [signum - 1].pending = 1;
2777 evpipe_write (EV_A_ &sig_pending);
2778}
2779
1312static void 2780static void
1313ev_sighandler (int signum) 2781ev_sighandler (int signum)
1314{ 2782{
1315#if EV_MULTIPLICITY
1316 EV_P = signals [signum - 1].loop;
1317#endif
1318
1319#ifdef _WIN32 2783#ifdef _WIN32
1320 signal (signum, ev_sighandler); 2784 signal (signum, ev_sighandler);
1321#endif 2785#endif
1322 2786
1323 signals [signum - 1].pending = 1; 2787 ev_feed_signal (signum);
1324 evpipe_write (EV_A_ &sig_pending);
1325} 2788}
1326 2789
1327void noinline 2790ecb_noinline
2791void
1328ev_feed_signal_event (EV_P_ int signum) 2792ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1329{ 2793{
1330 WL w; 2794 WL w;
1331 2795
1332 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2796 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1333 return; 2797 return;
1334 2798
1335 --signum; 2799 --signum;
1336 2800
1337#if EV_MULTIPLICITY 2801#if EV_MULTIPLICITY
1338 /* it is permissible to try to feed a signal to the wrong loop */ 2802 /* it is permissible to try to feed a signal to the wrong loop */
1339 /* or, likely more useful, feeding a signal nobody is waiting for */ 2803 /* or, likely more useful, feeding a signal nobody is waiting for */
1340 2804
1341 if (expect_false (signals [signum].loop != EV_A)) 2805 if (ecb_expect_false (signals [signum].loop != EV_A))
1342 return; 2806 return;
1343#endif 2807#endif
1344 2808
1345 signals [signum].pending = 0; 2809 signals [signum].pending = 0;
2810 ECB_MEMORY_FENCE_RELEASE;
1346 2811
1347 for (w = signals [signum].head; w; w = w->next) 2812 for (w = signals [signum].head; w; w = w->next)
1348 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2813 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1349} 2814}
1350 2815
… …
1366 break; 2831 break;
1367 } 2832 }
1368} 2833}
1369#endif 2834#endif
1370 2835
2836#endif
2837
1371/*****************************************************************************/ 2838/*****************************************************************************/
1372 2839
2840#if EV_CHILD_ENABLE
1373static WL childs [EV_PID_HASHSIZE]; 2841static WL childs [EV_PID_HASHSIZE];
1374
1375#ifndef _WIN32
1376 2842
1377static ev_signal childev; 2843static ev_signal childev;
1378 2844
1379#ifndef WIFCONTINUED 2845#ifndef WIFCONTINUED
1380# define WIFCONTINUED(status) 0 2846# define WIFCONTINUED(status) 0
… …
1385child_reap (EV_P_ int chain, int pid, int status) 2851child_reap (EV_P_ int chain, int pid, int status)
1386{ 2852{
1387 ev_child *w; 2853 ev_child *w;
1388 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2854 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1389 2855
1390 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2856 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1391 { 2857 {
1392 if ((w->pid == pid || !w->pid) 2858 if ((w->pid == pid || !w->pid)
1393 && (!traced || (w->flags & 1))) 2859 && (!traced || (w->flags & 1)))
1394 { 2860 {
1395 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2861 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1420 /* make sure we are called again until all children have been reaped */ 2886 /* make sure we are called again until all children have been reaped */
1421 /* we need to do it this way so that the callback gets called before we continue */ 2887 /* we need to do it this way so that the callback gets called before we continue */
1422 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2888 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1423 2889
1424 child_reap (EV_A_ pid, pid, status); 2890 child_reap (EV_A_ pid, pid, status);
1425 if (EV_PID_HASHSIZE > 1) 2891 if ((EV_PID_HASHSIZE) > 1)
1426 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2892 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1427} 2893}
1428 2894
1429#endif 2895#endif
1430 2896
1431/*****************************************************************************/ 2897/*****************************************************************************/
1432 2898
2899#if EV_USE_TIMERFD
2900
2901static void periodics_reschedule (EV_P);
2902
2903static void
2904timerfdcb (EV_P_ ev_io *iow, int revents)
2905{
2906 struct itimerspec its = { 0 };
2907
2908 /* since we can't easily come zup with a (portable) maximum value of time_t,
2909 * we wake up once per month, which hopefully is rare enough to not
2910 * be a problem. */
2911 its.it_value.tv_sec = ev_rt_now + 86400 * 30;
2912 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
2913
2914 ev_rt_now = ev_time ();
2915 /* periodics_reschedule only needs ev_rt_now */
2916 /* but maybe in the future we want the full treatment. */
2917 /*
2918 now_floor = EV_TS_CONST (0.);
2919 time_update (EV_A_ EV_TSTAMP_HUGE);
2920 */
2921 periodics_reschedule (EV_A);
2922}
2923
2924ecb_noinline ecb_cold
2925static void
2926evtimerfd_init (EV_P)
2927{
2928 if (!ev_is_active (&timerfd_w))
2929 {
2930 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
2931
2932 if (timerfd >= 0)
2933 {
2934 fd_intern (timerfd); /* just to be sure */
2935
2936 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
2937 ev_set_priority (&timerfd_w, EV_MINPRI);
2938 ev_io_start (EV_A_ &timerfd_w);
2939 ev_unref (EV_A); /* watcher should not keep loop alive */
2940
2941 /* (re-) arm timer */
2942 timerfdcb (EV_A_ 0, 0);
2943 }
2944 }
2945}
2946
2947#endif
2948
2949/*****************************************************************************/
2950
2951#if EV_USE_IOCP
2952# include "ev_iocp.c"
2953#endif
1433#if EV_USE_PORT 2954#if EV_USE_PORT
1434# include "ev_port.c" 2955# include "ev_port.c"
1435#endif 2956#endif
1436#if EV_USE_KQUEUE 2957#if EV_USE_KQUEUE
1437# include "ev_kqueue.c" 2958# include "ev_kqueue.c"
1438#endif 2959#endif
1439#if EV_USE_EPOLL 2960#if EV_USE_EPOLL
1440# include "ev_epoll.c" 2961# include "ev_epoll.c"
1441#endif 2962#endif
2963#if EV_USE_LINUXAIO
2964# include "ev_linuxaio.c"
2965#endif
2966#if EV_USE_IOURING
2967# include "ev_iouring.c"
2968#endif
1442#if EV_USE_POLL 2969#if EV_USE_POLL
1443# include "ev_poll.c" 2970# include "ev_poll.c"
1444#endif 2971#endif
1445#if EV_USE_SELECT 2972#if EV_USE_SELECT
1446# include "ev_select.c" 2973# include "ev_select.c"
1447#endif 2974#endif
1448 2975
1449int 2976ecb_cold int
1450ev_version_major (void) 2977ev_version_major (void) EV_NOEXCEPT
1451{ 2978{
1452 return EV_VERSION_MAJOR; 2979 return EV_VERSION_MAJOR;
1453} 2980}
1454 2981
1455int 2982ecb_cold int
1456ev_version_minor (void) 2983ev_version_minor (void) EV_NOEXCEPT
1457{ 2984{
1458 return EV_VERSION_MINOR; 2985 return EV_VERSION_MINOR;
1459} 2986}
1460 2987
1461/* return true if we are running with elevated privileges and should ignore env variables */ 2988/* return true if we are running with elevated privileges and should ignore env variables */
1462int inline_size 2989inline_size ecb_cold int
1463enable_secure (void) 2990enable_secure (void)
1464{ 2991{
1465#ifdef _WIN32 2992#ifdef _WIN32
1466 return 0; 2993 return 0;
1467#else 2994#else
1468 return getuid () != geteuid () 2995 return getuid () != geteuid ()
1469 || getgid () != getegid (); 2996 || getgid () != getegid ();
1470#endif 2997#endif
1471} 2998}
1472 2999
3000ecb_cold
1473unsigned int 3001unsigned int
1474ev_supported_backends (void) 3002ev_supported_backends (void) EV_NOEXCEPT
1475{ 3003{
1476 unsigned int flags = 0; 3004 unsigned int flags = 0;
1477 3005
1478 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3006 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1479 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3007 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1480 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3008 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1481 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3009 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1482 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3010 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1483 3011 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3012 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3013
1484 return flags; 3014 return flags;
1485} 3015}
1486 3016
3017ecb_cold
1487unsigned int 3018unsigned int
1488ev_recommended_backends (void) 3019ev_recommended_backends (void) EV_NOEXCEPT
1489{ 3020{
1490 unsigned int flags = ev_supported_backends (); 3021 unsigned int flags = ev_supported_backends ();
1491 3022
1492#ifndef __NetBSD__ 3023#ifndef __NetBSD__
1493 /* kqueue is borked on everything but netbsd apparently */ 3024 /* kqueue is borked on everything but netbsd apparently */
… …
1497#ifdef __APPLE__ 3028#ifdef __APPLE__
1498 /* only select works correctly on that "unix-certified" platform */ 3029 /* only select works correctly on that "unix-certified" platform */
1499 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 3030 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1500 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 3031 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1501#endif 3032#endif
3033#ifdef __FreeBSD__
3034 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
3035#endif
3036
3037 /* TODO: linuxaio is very experimental */
3038#if !EV_RECOMMEND_LINUXAIO
3039 flags &= ~EVBACKEND_LINUXAIO;
3040#endif
3041 /* TODO: linuxaio is super experimental */
3042#if !EV_RECOMMEND_IOURING
3043 flags &= ~EVBACKEND_IOURING;
3044#endif
1502 3045
1503 return flags; 3046 return flags;
1504} 3047}
1505 3048
3049ecb_cold
1506unsigned int 3050unsigned int
1507ev_embeddable_backends (void) 3051ev_embeddable_backends (void) EV_NOEXCEPT
1508{ 3052{
1509 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3053 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1510 3054
1511 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3055 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1512 /* please fix it and tell me how to detect the fix */ 3056 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1513 flags &= ~EVBACKEND_EPOLL; 3057 flags &= ~EVBACKEND_EPOLL;
3058
3059 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
1514 3060
1515 return flags; 3061 return flags;
1516} 3062}
1517 3063
1518unsigned int 3064unsigned int
1519ev_backend (EV_P) 3065ev_backend (EV_P) EV_NOEXCEPT
1520{ 3066{
1521 return backend; 3067 return backend;
1522} 3068}
1523 3069
1524#if EV_MINIMAL < 2 3070#if EV_FEATURE_API
1525unsigned int 3071unsigned int
1526ev_loop_count (EV_P) 3072ev_iteration (EV_P) EV_NOEXCEPT
1527{ 3073{
1528 return loop_count; 3074 return loop_count;
1529} 3075}
1530 3076
1531unsigned int 3077unsigned int
1532ev_loop_depth (EV_P) 3078ev_depth (EV_P) EV_NOEXCEPT
1533{ 3079{
1534 return loop_depth; 3080 return loop_depth;
1535} 3081}
1536 3082
1537void 3083void
1538ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3084ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1539{ 3085{
1540 io_blocktime = interval; 3086 io_blocktime = interval;
1541} 3087}
1542 3088
1543void 3089void
1544ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3090ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1545{ 3091{
1546 timeout_blocktime = interval; 3092 timeout_blocktime = interval;
1547} 3093}
1548 3094
1549void 3095void
1550ev_set_userdata (EV_P_ void *data) 3096ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1551{ 3097{
1552 userdata = data; 3098 userdata = data;
1553} 3099}
1554 3100
1555void * 3101void *
1556ev_userdata (EV_P) 3102ev_userdata (EV_P) EV_NOEXCEPT
1557{ 3103{
1558 return userdata; 3104 return userdata;
1559} 3105}
1560 3106
3107void
1561void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 3108ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1562{ 3109{
1563 invoke_cb = invoke_pending_cb; 3110 invoke_cb = invoke_pending_cb;
1564} 3111}
1565 3112
3113void
1566void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 3114ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1567{ 3115{
1568 release_cb = release; 3116 release_cb = release;
1569 acquire_cb = acquire; 3117 acquire_cb = acquire;
1570} 3118}
1571#endif 3119#endif
1572 3120
1573/* initialise a loop structure, must be zero-initialised */ 3121/* initialise a loop structure, must be zero-initialised */
1574static void noinline 3122ecb_noinline ecb_cold
3123static void
1575loop_init (EV_P_ unsigned int flags) 3124loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1576{ 3125{
1577 if (!backend) 3126 if (!backend)
1578 { 3127 {
3128 origflags = flags;
3129
1579#if EV_USE_REALTIME 3130#if EV_USE_REALTIME
1580 if (!have_realtime) 3131 if (!have_realtime)
1581 { 3132 {
1582 struct timespec ts; 3133 struct timespec ts;
1583 3134
… …
1605 if (!(flags & EVFLAG_NOENV) 3156 if (!(flags & EVFLAG_NOENV)
1606 && !enable_secure () 3157 && !enable_secure ()
1607 && getenv ("LIBEV_FLAGS")) 3158 && getenv ("LIBEV_FLAGS"))
1608 flags = atoi (getenv ("LIBEV_FLAGS")); 3159 flags = atoi (getenv ("LIBEV_FLAGS"));
1609 3160
1610 ev_rt_now = ev_time (); 3161 ev_rt_now = ev_time ();
1611 mn_now = get_clock (); 3162 mn_now = get_clock ();
1612 now_floor = mn_now; 3163 now_floor = mn_now;
1613 rtmn_diff = ev_rt_now - mn_now; 3164 rtmn_diff = ev_rt_now - mn_now;
1614#if EV_MINIMAL < 2 3165#if EV_FEATURE_API
1615 invoke_cb = ev_invoke_pending; 3166 invoke_cb = ev_invoke_pending;
1616#endif 3167#endif
1617 3168
1618 io_blocktime = 0.; 3169 io_blocktime = 0.;
1619 timeout_blocktime = 0.; 3170 timeout_blocktime = 0.;
1620 backend = 0; 3171 backend = 0;
1621 backend_fd = -1; 3172 backend_fd = -1;
1622 sig_pending = 0; 3173 sig_pending = 0;
1623#if EV_ASYNC_ENABLE 3174#if EV_ASYNC_ENABLE
1624 async_pending = 0; 3175 async_pending = 0;
1625#endif 3176#endif
3177 pipe_write_skipped = 0;
3178 pipe_write_wanted = 0;
3179 evpipe [0] = -1;
3180 evpipe [1] = -1;
1626#if EV_USE_INOTIFY 3181#if EV_USE_INOTIFY
1627 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3182 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1628#endif 3183#endif
1629#if EV_USE_SIGNALFD 3184#if EV_USE_SIGNALFD
1630 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3185 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1631#endif 3186#endif
3187#if EV_USE_TIMERFD
3188 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3189#endif
1632 3190
1633 if (!(flags & 0x0000ffffU)) 3191 if (!(flags & EVBACKEND_MASK))
1634 flags |= ev_recommended_backends (); 3192 flags |= ev_recommended_backends ();
1635 3193
3194#if EV_USE_IOCP
3195 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3196#endif
1636#if EV_USE_PORT 3197#if EV_USE_PORT
1637 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3198 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1638#endif 3199#endif
1639#if EV_USE_KQUEUE 3200#if EV_USE_KQUEUE
1640 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3201 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3202#endif
3203#if EV_USE_IOURING
3204 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3205#endif
3206#if EV_USE_LINUXAIO
3207 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1641#endif 3208#endif
1642#if EV_USE_EPOLL 3209#if EV_USE_EPOLL
1643 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3210 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1644#endif 3211#endif
1645#if EV_USE_POLL 3212#if EV_USE_POLL
1646 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3213 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1647#endif 3214#endif
1648#if EV_USE_SELECT 3215#if EV_USE_SELECT
1649 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3216 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1650#endif 3217#endif
1651 3218
1652 ev_prepare_init (&pending_w, pendingcb); 3219 ev_prepare_init (&pending_w, pendingcb);
1653 3220
3221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1654 ev_init (&pipe_w, pipecb); 3222 ev_init (&pipe_w, pipecb);
1655 ev_set_priority (&pipe_w, EV_MAXPRI); 3223 ev_set_priority (&pipe_w, EV_MAXPRI);
3224#endif
1656 } 3225 }
1657} 3226}
1658 3227
1659/* free up a loop structure */ 3228/* free up a loop structure */
1660static void noinline 3229ecb_cold
3230void
1661loop_destroy (EV_P) 3231ev_loop_destroy (EV_P)
1662{ 3232{
1663 int i; 3233 int i;
3234
3235#if EV_MULTIPLICITY
3236 /* mimic free (0) */
3237 if (!EV_A)
3238 return;
3239#endif
3240
3241#if EV_CLEANUP_ENABLE
3242 /* queue cleanup watchers (and execute them) */
3243 if (ecb_expect_false (cleanupcnt))
3244 {
3245 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3246 EV_INVOKE_PENDING;
3247 }
3248#endif
3249
3250#if EV_CHILD_ENABLE
3251 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3252 {
3253 ev_ref (EV_A); /* child watcher */
3254 ev_signal_stop (EV_A_ &childev);
3255 }
3256#endif
1664 3257
1665 if (ev_is_active (&pipe_w)) 3258 if (ev_is_active (&pipe_w))
1666 { 3259 {
1667 /*ev_ref (EV_A);*/ 3260 /*ev_ref (EV_A);*/
1668 /*ev_io_stop (EV_A_ &pipe_w);*/ 3261 /*ev_io_stop (EV_A_ &pipe_w);*/
1669 3262
1670#if EV_USE_EVENTFD
1671 if (evfd >= 0)
1672 close (evfd);
1673#endif
1674
1675 if (evpipe [0] >= 0)
1676 {
1677 EV_WIN32_CLOSE_FD (evpipe [0]); 3263 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1678 EV_WIN32_CLOSE_FD (evpipe [1]); 3264 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1679 }
1680 } 3265 }
1681 3266
1682#if EV_USE_SIGNALFD 3267#if EV_USE_SIGNALFD
1683 if (ev_is_active (&sigfd_w)) 3268 if (ev_is_active (&sigfd_w))
1684 close (sigfd); 3269 close (sigfd);
1685#endif 3270#endif
1686 3271
3272#if EV_USE_TIMERFD
3273 if (ev_is_active (&timerfd_w))
3274 close (timerfd);
3275#endif
3276
1687#if EV_USE_INOTIFY 3277#if EV_USE_INOTIFY
1688 if (fs_fd >= 0) 3278 if (fs_fd >= 0)
1689 close (fs_fd); 3279 close (fs_fd);
1690#endif 3280#endif
1691 3281
1692 if (backend_fd >= 0) 3282 if (backend_fd >= 0)
1693 close (backend_fd); 3283 close (backend_fd);
1694 3284
3285#if EV_USE_IOCP
3286 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3287#endif
1695#if EV_USE_PORT 3288#if EV_USE_PORT
1696 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3289 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1697#endif 3290#endif
1698#if EV_USE_KQUEUE 3291#if EV_USE_KQUEUE
1699 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3292 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3293#endif
3294#if EV_USE_IOURING
3295 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3296#endif
3297#if EV_USE_LINUXAIO
3298 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1700#endif 3299#endif
1701#if EV_USE_EPOLL 3300#if EV_USE_EPOLL
1702 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3301 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1703#endif 3302#endif
1704#if EV_USE_POLL 3303#if EV_USE_POLL
1705 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3304 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1706#endif 3305#endif
1707#if EV_USE_SELECT 3306#if EV_USE_SELECT
1708 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3307 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1709#endif 3308#endif
1710 3309
1711 for (i = NUMPRI; i--; ) 3310 for (i = NUMPRI; i--; )
1712 { 3311 {
1713 array_free (pending, [i]); 3312 array_free (pending, [i]);
… …
1726 array_free (periodic, EMPTY); 3325 array_free (periodic, EMPTY);
1727#endif 3326#endif
1728#if EV_FORK_ENABLE 3327#if EV_FORK_ENABLE
1729 array_free (fork, EMPTY); 3328 array_free (fork, EMPTY);
1730#endif 3329#endif
3330#if EV_CLEANUP_ENABLE
3331 array_free (cleanup, EMPTY);
3332#endif
1731 array_free (prepare, EMPTY); 3333 array_free (prepare, EMPTY);
1732 array_free (check, EMPTY); 3334 array_free (check, EMPTY);
1733#if EV_ASYNC_ENABLE 3335#if EV_ASYNC_ENABLE
1734 array_free (async, EMPTY); 3336 array_free (async, EMPTY);
1735#endif 3337#endif
1736 3338
1737 backend = 0; 3339 backend = 0;
3340
3341#if EV_MULTIPLICITY
3342 if (ev_is_default_loop (EV_A))
3343#endif
3344 ev_default_loop_ptr = 0;
3345#if EV_MULTIPLICITY
3346 else
3347 ev_free (EV_A);
3348#endif
1738} 3349}
1739 3350
1740#if EV_USE_INOTIFY 3351#if EV_USE_INOTIFY
1741inline_size void infy_fork (EV_P); 3352inline_size void infy_fork (EV_P);
1742#endif 3353#endif
1743 3354
1744inline_size void 3355inline_size void
1745loop_fork (EV_P) 3356loop_fork (EV_P)
1746{ 3357{
1747#if EV_USE_PORT 3358#if EV_USE_PORT
1748 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3359 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1749#endif 3360#endif
1750#if EV_USE_KQUEUE 3361#if EV_USE_KQUEUE
1751 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3362 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3363#endif
3364#if EV_USE_IOURING
3365 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3366#endif
3367#if EV_USE_LINUXAIO
3368 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1752#endif 3369#endif
1753#if EV_USE_EPOLL 3370#if EV_USE_EPOLL
1754 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3371 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1755#endif 3372#endif
1756#if EV_USE_INOTIFY 3373#if EV_USE_INOTIFY
1757 infy_fork (EV_A); 3374 infy_fork (EV_A);
1758#endif 3375#endif
1759 3376
3377 if (postfork != 2)
3378 {
3379 #if EV_USE_SIGNALFD
3380 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3381 #endif
3382
3383 #if EV_USE_TIMERFD
3384 if (ev_is_active (&timerfd_w))
3385 {
3386 ev_ref (EV_A);
3387 ev_io_stop (EV_A_ &timerfd_w);
3388
3389 close (timerfd);
3390 timerfd = -2;
3391
3392 evtimerfd_init (EV_A);
3393 /* reschedule periodics, in case we missed something */
3394 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3395 }
3396 #endif
3397
3398 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1760 if (ev_is_active (&pipe_w)) 3399 if (ev_is_active (&pipe_w))
1761 { 3400 {
1762 /* this "locks" the handlers against writing to the pipe */ 3401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1763 /* while we modify the fd vars */ 3402
1764 sig_pending = 1;
1765#if EV_ASYNC_ENABLE
1766 async_pending = 1;
1767#endif
1768
1769 ev_ref (EV_A); 3403 ev_ref (EV_A);
1770 ev_io_stop (EV_A_ &pipe_w); 3404 ev_io_stop (EV_A_ &pipe_w);
1771 3405
1772#if EV_USE_EVENTFD
1773 if (evfd >= 0)
1774 close (evfd);
1775#endif
1776
1777 if (evpipe [0] >= 0) 3406 if (evpipe [0] >= 0)
1778 {
1779 EV_WIN32_CLOSE_FD (evpipe [0]); 3407 EV_WIN32_CLOSE_FD (evpipe [0]);
1780 EV_WIN32_CLOSE_FD (evpipe [1]); 3408
3409 evpipe_init (EV_A);
3410 /* iterate over everything, in case we missed something before */
3411 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1781 } 3412 }
1782 3413 #endif
1783 evpipe_init (EV_A);
1784 /* now iterate over everything, in case we missed something */
1785 pipecb (EV_A_ &pipe_w, EV_READ);
1786 } 3414 }
1787 3415
1788 postfork = 0; 3416 postfork = 0;
1789} 3417}
1790 3418
1791#if EV_MULTIPLICITY 3419#if EV_MULTIPLICITY
1792 3420
3421ecb_cold
1793struct ev_loop * 3422struct ev_loop *
1794ev_loop_new (unsigned int flags) 3423ev_loop_new (unsigned int flags) EV_NOEXCEPT
1795{ 3424{
1796 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3425 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1797 3426
1798 memset (EV_A, 0, sizeof (struct ev_loop)); 3427 memset (EV_A, 0, sizeof (struct ev_loop));
1799 loop_init (EV_A_ flags); 3428 loop_init (EV_A_ flags);
1800 3429
1801 if (ev_backend (EV_A)) 3430 if (ev_backend (EV_A))
1802 return EV_A; 3431 return EV_A;
1803 3432
3433 ev_free (EV_A);
1804 return 0; 3434 return 0;
1805} 3435}
1806 3436
1807void
1808ev_loop_destroy (EV_P)
1809{
1810 loop_destroy (EV_A);
1811 ev_free (loop);
1812}
1813
1814void
1815ev_loop_fork (EV_P)
1816{
1817 postfork = 1; /* must be in line with ev_default_fork */
1818}
1819#endif /* multiplicity */ 3437#endif /* multiplicity */
1820 3438
1821#if EV_VERIFY 3439#if EV_VERIFY
1822static void noinline 3440ecb_noinline ecb_cold
3441static void
1823verify_watcher (EV_P_ W w) 3442verify_watcher (EV_P_ W w)
1824{ 3443{
1825 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3444 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1826 3445
1827 if (w->pending) 3446 if (w->pending)
1828 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3447 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1829} 3448}
1830 3449
1831static void noinline 3450ecb_noinline ecb_cold
3451static void
1832verify_heap (EV_P_ ANHE *heap, int N) 3452verify_heap (EV_P_ ANHE *heap, int N)
1833{ 3453{
1834 int i; 3454 int i;
1835 3455
1836 for (i = HEAP0; i < N + HEAP0; ++i) 3456 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1841 3461
1842 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3462 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1843 } 3463 }
1844} 3464}
1845 3465
1846static void noinline 3466ecb_noinline ecb_cold
3467static void
1847array_verify (EV_P_ W *ws, int cnt) 3468array_verify (EV_P_ W *ws, int cnt)
1848{ 3469{
1849 while (cnt--) 3470 while (cnt--)
1850 { 3471 {
1851 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3472 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1852 verify_watcher (EV_A_ ws [cnt]); 3473 verify_watcher (EV_A_ ws [cnt]);
1853 } 3474 }
1854} 3475}
1855#endif 3476#endif
1856 3477
1857#if EV_MINIMAL < 2 3478#if EV_FEATURE_API
1858void 3479void ecb_cold
1859ev_loop_verify (EV_P) 3480ev_verify (EV_P) EV_NOEXCEPT
1860{ 3481{
1861#if EV_VERIFY 3482#if EV_VERIFY
1862 int i; 3483 int i;
1863 WL w; 3484 WL w, w2;
1864 3485
1865 assert (activecnt >= -1); 3486 assert (activecnt >= -1);
1866 3487
1867 assert (fdchangemax >= fdchangecnt); 3488 assert (fdchangemax >= fdchangecnt);
1868 for (i = 0; i < fdchangecnt; ++i) 3489 for (i = 0; i < fdchangecnt; ++i)
1869 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3490 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1870 3491
1871 assert (anfdmax >= 0); 3492 assert (anfdmax >= 0);
1872 for (i = 0; i < anfdmax; ++i) 3493 for (i = 0; i < anfdmax; ++i)
3494 {
3495 int j = 0;
3496
1873 for (w = anfds [i].head; w; w = w->next) 3497 for (w = w2 = anfds [i].head; w; w = w->next)
1874 { 3498 {
1875 verify_watcher (EV_A_ (W)w); 3499 verify_watcher (EV_A_ (W)w);
3500
3501 if (j++ & 1)
3502 {
3503 assert (("libev: io watcher list contains a loop", w != w2));
3504 w2 = w2->next;
3505 }
3506
1876 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3507 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1877 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3508 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1878 } 3509 }
3510 }
1879 3511
1880 assert (timermax >= timercnt); 3512 assert (timermax >= timercnt);
1881 verify_heap (EV_A_ timers, timercnt); 3513 verify_heap (EV_A_ timers, timercnt);
1882 3514
1883#if EV_PERIODIC_ENABLE 3515#if EV_PERIODIC_ENABLE
… …
1898#if EV_FORK_ENABLE 3530#if EV_FORK_ENABLE
1899 assert (forkmax >= forkcnt); 3531 assert (forkmax >= forkcnt);
1900 array_verify (EV_A_ (W *)forks, forkcnt); 3532 array_verify (EV_A_ (W *)forks, forkcnt);
1901#endif 3533#endif
1902 3534
3535#if EV_CLEANUP_ENABLE
3536 assert (cleanupmax >= cleanupcnt);
3537 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3538#endif
3539
1903#if EV_ASYNC_ENABLE 3540#if EV_ASYNC_ENABLE
1904 assert (asyncmax >= asynccnt); 3541 assert (asyncmax >= asynccnt);
1905 array_verify (EV_A_ (W *)asyncs, asynccnt); 3542 array_verify (EV_A_ (W *)asyncs, asynccnt);
1906#endif 3543#endif
1907 3544
3545#if EV_PREPARE_ENABLE
1908 assert (preparemax >= preparecnt); 3546 assert (preparemax >= preparecnt);
1909 array_verify (EV_A_ (W *)prepares, preparecnt); 3547 array_verify (EV_A_ (W *)prepares, preparecnt);
3548#endif
1910 3549
3550#if EV_CHECK_ENABLE
1911 assert (checkmax >= checkcnt); 3551 assert (checkmax >= checkcnt);
1912 array_verify (EV_A_ (W *)checks, checkcnt); 3552 array_verify (EV_A_ (W *)checks, checkcnt);
3553#endif
1913 3554
1914# if 0 3555# if 0
3556#if EV_CHILD_ENABLE
1915 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3557 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1916 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) 3558 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3559#endif
1917# endif 3560# endif
1918#endif 3561#endif
1919} 3562}
1920#endif 3563#endif
1921 3564
1922#if EV_MULTIPLICITY 3565#if EV_MULTIPLICITY
3566ecb_cold
1923struct ev_loop * 3567struct ev_loop *
1924ev_default_loop_init (unsigned int flags)
1925#else 3568#else
1926int 3569int
3570#endif
1927ev_default_loop (unsigned int flags) 3571ev_default_loop (unsigned int flags) EV_NOEXCEPT
1928#endif
1929{ 3572{
1930 if (!ev_default_loop_ptr) 3573 if (!ev_default_loop_ptr)
1931 { 3574 {
1932#if EV_MULTIPLICITY 3575#if EV_MULTIPLICITY
1933 EV_P = ev_default_loop_ptr = &default_loop_struct; 3576 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1937 3580
1938 loop_init (EV_A_ flags); 3581 loop_init (EV_A_ flags);
1939 3582
1940 if (ev_backend (EV_A)) 3583 if (ev_backend (EV_A))
1941 { 3584 {
1942#ifndef _WIN32 3585#if EV_CHILD_ENABLE
1943 ev_signal_init (&childev, childcb, SIGCHLD); 3586 ev_signal_init (&childev, childcb, SIGCHLD);
1944 ev_set_priority (&childev, EV_MAXPRI); 3587 ev_set_priority (&childev, EV_MAXPRI);
1945 ev_signal_start (EV_A_ &childev); 3588 ev_signal_start (EV_A_ &childev);
1946 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3589 ev_unref (EV_A); /* child watcher should not keep loop alive */
1947#endif 3590#endif
… …
1952 3595
1953 return ev_default_loop_ptr; 3596 return ev_default_loop_ptr;
1954} 3597}
1955 3598
1956void 3599void
1957ev_default_destroy (void) 3600ev_loop_fork (EV_P) EV_NOEXCEPT
1958{ 3601{
1959#if EV_MULTIPLICITY 3602 postfork = 1;
1960 EV_P = ev_default_loop_ptr;
1961#endif
1962
1963 ev_default_loop_ptr = 0;
1964
1965#ifndef _WIN32
1966 ev_ref (EV_A); /* child watcher */
1967 ev_signal_stop (EV_A_ &childev);
1968#endif
1969
1970 loop_destroy (EV_A);
1971}
1972
1973void
1974ev_default_fork (void)
1975{
1976#if EV_MULTIPLICITY
1977 EV_P = ev_default_loop_ptr;
1978#endif
1979
1980 postfork = 1; /* must be in line with ev_loop_fork */
1981} 3603}
1982 3604
1983/*****************************************************************************/ 3605/*****************************************************************************/
1984 3606
1985void 3607void
… …
1987{ 3609{
1988 EV_CB_INVOKE ((W)w, revents); 3610 EV_CB_INVOKE ((W)w, revents);
1989} 3611}
1990 3612
1991unsigned int 3613unsigned int
1992ev_pending_count (EV_P) 3614ev_pending_count (EV_P) EV_NOEXCEPT
1993{ 3615{
1994 int pri; 3616 int pri;
1995 unsigned int count = 0; 3617 unsigned int count = 0;
1996 3618
1997 for (pri = NUMPRI; pri--; ) 3619 for (pri = NUMPRI; pri--; )
1998 count += pendingcnt [pri]; 3620 count += pendingcnt [pri];
1999 3621
2000 return count; 3622 return count;
2001} 3623}
2002 3624
2003void noinline 3625ecb_noinline
3626void
2004ev_invoke_pending (EV_P) 3627ev_invoke_pending (EV_P)
2005{ 3628{
2006 int pri; 3629 pendingpri = NUMPRI;
2007 3630
2008 for (pri = NUMPRI; pri--; ) 3631 do
3632 {
3633 --pendingpri;
3634
3635 /* pendingpri possibly gets modified in the inner loop */
2009 while (pendingcnt [pri]) 3636 while (pendingcnt [pendingpri])
2010 { 3637 {
2011 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3638 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2012 3639
2013 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2014 /* ^ this is no longer true, as pending_w could be here */
2015
2016 p->w->pending = 0; 3640 p->w->pending = 0;
2017 EV_CB_INVOKE (p->w, p->events); 3641 EV_CB_INVOKE (p->w, p->events);
2018 EV_FREQUENT_CHECK; 3642 EV_FREQUENT_CHECK;
2019 } 3643 }
3644 }
3645 while (pendingpri);
2020} 3646}
2021 3647
2022#if EV_IDLE_ENABLE 3648#if EV_IDLE_ENABLE
2023/* make idle watchers pending. this handles the "call-idle */ 3649/* make idle watchers pending. this handles the "call-idle */
2024/* only when higher priorities are idle" logic */ 3650/* only when higher priorities are idle" logic */
2025inline_size void 3651inline_size void
2026idle_reify (EV_P) 3652idle_reify (EV_P)
2027{ 3653{
2028 if (expect_false (idleall)) 3654 if (ecb_expect_false (idleall))
2029 { 3655 {
2030 int pri; 3656 int pri;
2031 3657
2032 for (pri = NUMPRI; pri--; ) 3658 for (pri = NUMPRI; pri--; )
2033 { 3659 {
… …
2063 { 3689 {
2064 ev_at (w) += w->repeat; 3690 ev_at (w) += w->repeat;
2065 if (ev_at (w) < mn_now) 3691 if (ev_at (w) < mn_now)
2066 ev_at (w) = mn_now; 3692 ev_at (w) = mn_now;
2067 3693
2068 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3694 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
2069 3695
2070 ANHE_at_cache (timers [HEAP0]); 3696 ANHE_at_cache (timers [HEAP0]);
2071 downheap (timers, timercnt, HEAP0); 3697 downheap (timers, timercnt, HEAP0);
2072 } 3698 }
2073 else 3699 else
… …
2076 EV_FREQUENT_CHECK; 3702 EV_FREQUENT_CHECK;
2077 feed_reverse (EV_A_ (W)w); 3703 feed_reverse (EV_A_ (W)w);
2078 } 3704 }
2079 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3705 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2080 3706
2081 feed_reverse_done (EV_A_ EV_TIMEOUT); 3707 feed_reverse_done (EV_A_ EV_TIMER);
2082 } 3708 }
2083} 3709}
2084 3710
2085#if EV_PERIODIC_ENABLE 3711#if EV_PERIODIC_ENABLE
3712
3713ecb_noinline
3714static void
3715periodic_recalc (EV_P_ ev_periodic *w)
3716{
3717 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3718 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3719
3720 /* the above almost always errs on the low side */
3721 while (at <= ev_rt_now)
3722 {
3723 ev_tstamp nat = at + w->interval;
3724
3725 /* when resolution fails us, we use ev_rt_now */
3726 if (ecb_expect_false (nat == at))
3727 {
3728 at = ev_rt_now;
3729 break;
3730 }
3731
3732 at = nat;
3733 }
3734
3735 ev_at (w) = at;
3736}
3737
2086/* make periodics pending */ 3738/* make periodics pending */
2087inline_size void 3739inline_size void
2088periodics_reify (EV_P) 3740periodics_reify (EV_P)
2089{ 3741{
2090 EV_FREQUENT_CHECK; 3742 EV_FREQUENT_CHECK;
2091 3743
2092 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3744 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2093 { 3745 {
2094 int feed_count = 0;
2095
2096 do 3746 do
2097 { 3747 {
2098 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3748 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2099 3749
2100 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3750 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2109 ANHE_at_cache (periodics [HEAP0]); 3759 ANHE_at_cache (periodics [HEAP0]);
2110 downheap (periodics, periodiccnt, HEAP0); 3760 downheap (periodics, periodiccnt, HEAP0);
2111 } 3761 }
2112 else if (w->interval) 3762 else if (w->interval)
2113 { 3763 {
2114 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3764 periodic_recalc (EV_A_ w);
2115 /* if next trigger time is not sufficiently in the future, put it there */
2116 /* this might happen because of floating point inexactness */
2117 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2118 {
2119 ev_at (w) += w->interval;
2120
2121 /* if interval is unreasonably low we might still have a time in the past */
2122 /* so correct this. this will make the periodic very inexact, but the user */
2123 /* has effectively asked to get triggered more often than possible */
2124 if (ev_at (w) < ev_rt_now)
2125 ev_at (w) = ev_rt_now;
2126 }
2127
2128 ANHE_at_cache (periodics [HEAP0]); 3765 ANHE_at_cache (periodics [HEAP0]);
2129 downheap (periodics, periodiccnt, HEAP0); 3766 downheap (periodics, periodiccnt, HEAP0);
2130 } 3767 }
2131 else 3768 else
2132 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3769 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2139 feed_reverse_done (EV_A_ EV_PERIODIC); 3776 feed_reverse_done (EV_A_ EV_PERIODIC);
2140 } 3777 }
2141} 3778}
2142 3779
2143/* simply recalculate all periodics */ 3780/* simply recalculate all periodics */
2144/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 3781/* TODO: maybe ensure that at least one event happens when jumping forward? */
2145static void noinline 3782ecb_noinline ecb_cold
3783static void
2146periodics_reschedule (EV_P) 3784periodics_reschedule (EV_P)
2147{ 3785{
2148 int i; 3786 int i;
2149 3787
2150 /* adjust periodics after time jump */ 3788 /* adjust periodics after time jump */
… …
2153 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3791 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2154 3792
2155 if (w->reschedule_cb) 3793 if (w->reschedule_cb)
2156 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3794 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2157 else if (w->interval) 3795 else if (w->interval)
2158 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3796 periodic_recalc (EV_A_ w);
2159 3797
2160 ANHE_at_cache (periodics [i]); 3798 ANHE_at_cache (periodics [i]);
2161 } 3799 }
2162 3800
2163 reheap (periodics, periodiccnt); 3801 reheap (periodics, periodiccnt);
2164} 3802}
2165#endif 3803#endif
2166 3804
2167/* adjust all timers by a given offset */ 3805/* adjust all timers by a given offset */
2168static void noinline 3806ecb_noinline ecb_cold
3807static void
2169timers_reschedule (EV_P_ ev_tstamp adjust) 3808timers_reschedule (EV_P_ ev_tstamp adjust)
2170{ 3809{
2171 int i; 3810 int i;
2172 3811
2173 for (i = 0; i < timercnt; ++i) 3812 for (i = 0; i < timercnt; ++i)
… …
2182/* also detect if there was a timejump, and act accordingly */ 3821/* also detect if there was a timejump, and act accordingly */
2183inline_speed void 3822inline_speed void
2184time_update (EV_P_ ev_tstamp max_block) 3823time_update (EV_P_ ev_tstamp max_block)
2185{ 3824{
2186#if EV_USE_MONOTONIC 3825#if EV_USE_MONOTONIC
2187 if (expect_true (have_monotonic)) 3826 if (ecb_expect_true (have_monotonic))
2188 { 3827 {
2189 int i; 3828 int i;
2190 ev_tstamp odiff = rtmn_diff; 3829 ev_tstamp odiff = rtmn_diff;
2191 3830
2192 mn_now = get_clock (); 3831 mn_now = get_clock ();
2193 3832
2194 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3833 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2195 /* interpolate in the meantime */ 3834 /* interpolate in the meantime */
2196 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3835 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
2197 { 3836 {
2198 ev_rt_now = rtmn_diff + mn_now; 3837 ev_rt_now = rtmn_diff + mn_now;
2199 return; 3838 return;
2200 } 3839 }
2201 3840
… …
2210 * doesn't hurt either as we only do this on time-jumps or 3849 * doesn't hurt either as we only do this on time-jumps or
2211 * in the unlikely event of having been preempted here. 3850 * in the unlikely event of having been preempted here.
2212 */ 3851 */
2213 for (i = 4; --i; ) 3852 for (i = 4; --i; )
2214 { 3853 {
3854 ev_tstamp diff;
2215 rtmn_diff = ev_rt_now - mn_now; 3855 rtmn_diff = ev_rt_now - mn_now;
2216 3856
2217 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3857 diff = odiff - rtmn_diff;
3858
3859 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
2218 return; /* all is well */ 3860 return; /* all is well */
2219 3861
2220 ev_rt_now = ev_time (); 3862 ev_rt_now = ev_time ();
2221 mn_now = get_clock (); 3863 mn_now = get_clock ();
2222 now_floor = mn_now; 3864 now_floor = mn_now;
… …
2231 else 3873 else
2232#endif 3874#endif
2233 { 3875 {
2234 ev_rt_now = ev_time (); 3876 ev_rt_now = ev_time ();
2235 3877
2236 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3878 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
2237 { 3879 {
2238 /* adjust timers. this is easy, as the offset is the same for all of them */ 3880 /* adjust timers. this is easy, as the offset is the same for all of them */
2239 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3881 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2240#if EV_PERIODIC_ENABLE 3882#if EV_PERIODIC_ENABLE
2241 periodics_reschedule (EV_A); 3883 periodics_reschedule (EV_A);
… …
2244 3886
2245 mn_now = ev_rt_now; 3887 mn_now = ev_rt_now;
2246 } 3888 }
2247} 3889}
2248 3890
2249void 3891int
2250ev_loop (EV_P_ int flags) 3892ev_run (EV_P_ int flags)
2251{ 3893{
2252#if EV_MINIMAL < 2 3894#if EV_FEATURE_API
2253 ++loop_depth; 3895 ++loop_depth;
2254#endif 3896#endif
2255 3897
2256 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3898 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2257 3899
2258 loop_done = EVUNLOOP_CANCEL; 3900 loop_done = EVBREAK_CANCEL;
2259 3901
2260 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3902 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2261 3903
2262 do 3904 do
2263 { 3905 {
2264#if EV_VERIFY >= 2 3906#if EV_VERIFY >= 2
2265 ev_loop_verify (EV_A); 3907 ev_verify (EV_A);
2266#endif 3908#endif
2267 3909
2268#ifndef _WIN32 3910#ifndef _WIN32
2269 if (expect_false (curpid)) /* penalise the forking check even more */ 3911 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2270 if (expect_false (getpid () != curpid)) 3912 if (ecb_expect_false (getpid () != curpid))
2271 { 3913 {
2272 curpid = getpid (); 3914 curpid = getpid ();
2273 postfork = 1; 3915 postfork = 1;
2274 } 3916 }
2275#endif 3917#endif
2276 3918
2277#if EV_FORK_ENABLE 3919#if EV_FORK_ENABLE
2278 /* we might have forked, so queue fork handlers */ 3920 /* we might have forked, so queue fork handlers */
2279 if (expect_false (postfork)) 3921 if (ecb_expect_false (postfork))
2280 if (forkcnt) 3922 if (forkcnt)
2281 { 3923 {
2282 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3924 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2283 EV_INVOKE_PENDING; 3925 EV_INVOKE_PENDING;
2284 } 3926 }
2285#endif 3927#endif
2286 3928
3929#if EV_PREPARE_ENABLE
2287 /* queue prepare watchers (and execute them) */ 3930 /* queue prepare watchers (and execute them) */
2288 if (expect_false (preparecnt)) 3931 if (ecb_expect_false (preparecnt))
2289 { 3932 {
2290 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3933 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2291 EV_INVOKE_PENDING; 3934 EV_INVOKE_PENDING;
2292 } 3935 }
3936#endif
2293 3937
2294 if (expect_false (loop_done)) 3938 if (ecb_expect_false (loop_done))
2295 break; 3939 break;
2296 3940
2297 /* we might have forked, so reify kernel state if necessary */ 3941 /* we might have forked, so reify kernel state if necessary */
2298 if (expect_false (postfork)) 3942 if (ecb_expect_false (postfork))
2299 loop_fork (EV_A); 3943 loop_fork (EV_A);
2300 3944
2301 /* update fd-related kernel structures */ 3945 /* update fd-related kernel structures */
2302 fd_reify (EV_A); 3946 fd_reify (EV_A);
2303 3947
2304 /* calculate blocking time */ 3948 /* calculate blocking time */
2305 { 3949 {
2306 ev_tstamp waittime = 0.; 3950 ev_tstamp waittime = 0.;
2307 ev_tstamp sleeptime = 0.; 3951 ev_tstamp sleeptime = 0.;
2308 3952
3953 /* remember old timestamp for io_blocktime calculation */
3954 ev_tstamp prev_mn_now = mn_now;
3955
3956 /* update time to cancel out callback processing overhead */
3957 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
3958
3959 /* from now on, we want a pipe-wake-up */
3960 pipe_write_wanted = 1;
3961
3962 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3963
2309 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3964 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2310 { 3965 {
2311 /* remember old timestamp for io_blocktime calculation */
2312 ev_tstamp prev_mn_now = mn_now;
2313
2314 /* update time to cancel out callback processing overhead */
2315 time_update (EV_A_ 1e100);
2316
2317 waittime = MAX_BLOCKTIME; 3966 waittime = EV_TS_CONST (MAX_BLOCKTIME);
2318 3967
2319 if (timercnt) 3968 if (timercnt)
2320 { 3969 {
2321 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3970 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2322 if (waittime > to) waittime = to; 3971 if (waittime > to) waittime = to;
2323 } 3972 }
2324 3973
2325#if EV_PERIODIC_ENABLE 3974#if EV_PERIODIC_ENABLE
2326 if (periodiccnt) 3975 if (periodiccnt)
2327 { 3976 {
2328 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3977 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2329 if (waittime > to) waittime = to; 3978 if (waittime > to) waittime = to;
2330 } 3979 }
2331#endif 3980#endif
2332 3981
2333 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3982 /* don't let timeouts decrease the waittime below timeout_blocktime */
2334 if (expect_false (waittime < timeout_blocktime)) 3983 if (ecb_expect_false (waittime < timeout_blocktime))
2335 waittime = timeout_blocktime; 3984 waittime = timeout_blocktime;
2336 3985
3986 /* now there are two more special cases left, either we have
3987 * already-expired timers, so we should not sleep, or we have timers
3988 * that expire very soon, in which case we need to wait for a minimum
3989 * amount of time for some event loop backends.
3990 */
3991 if (ecb_expect_false (waittime < backend_mintime))
3992 waittime = waittime <= EV_TS_CONST (0.)
3993 ? EV_TS_CONST (0.)
3994 : backend_mintime;
3995
2337 /* extra check because io_blocktime is commonly 0 */ 3996 /* extra check because io_blocktime is commonly 0 */
2338 if (expect_false (io_blocktime)) 3997 if (ecb_expect_false (io_blocktime))
2339 { 3998 {
2340 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3999 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2341 4000
2342 if (sleeptime > waittime - backend_fudge) 4001 if (sleeptime > waittime - backend_mintime)
2343 sleeptime = waittime - backend_fudge; 4002 sleeptime = waittime - backend_mintime;
2344 4003
2345 if (expect_true (sleeptime > 0.)) 4004 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2346 { 4005 {
2347 ev_sleep (sleeptime); 4006 ev_sleep (sleeptime);
2348 waittime -= sleeptime; 4007 waittime -= sleeptime;
2349 } 4008 }
2350 } 4009 }
2351 } 4010 }
2352 4011
2353#if EV_MINIMAL < 2 4012#if EV_FEATURE_API
2354 ++loop_count; 4013 ++loop_count;
2355#endif 4014#endif
2356 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 4015 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2357 backend_poll (EV_A_ waittime); 4016 backend_poll (EV_A_ waittime);
2358 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 4017 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
4018
4019 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
4020
4021 ECB_MEMORY_FENCE_ACQUIRE;
4022 if (pipe_write_skipped)
4023 {
4024 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
4025 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
4026 }
2359 4027
2360 /* update ev_rt_now, do magic */ 4028 /* update ev_rt_now, do magic */
2361 time_update (EV_A_ waittime + sleeptime); 4029 time_update (EV_A_ waittime + sleeptime);
2362 } 4030 }
2363 4031
… …
2370#if EV_IDLE_ENABLE 4038#if EV_IDLE_ENABLE
2371 /* queue idle watchers unless other events are pending */ 4039 /* queue idle watchers unless other events are pending */
2372 idle_reify (EV_A); 4040 idle_reify (EV_A);
2373#endif 4041#endif
2374 4042
4043#if EV_CHECK_ENABLE
2375 /* queue check watchers, to be executed first */ 4044 /* queue check watchers, to be executed first */
2376 if (expect_false (checkcnt)) 4045 if (ecb_expect_false (checkcnt))
2377 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4046 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
4047#endif
2378 4048
2379 EV_INVOKE_PENDING; 4049 EV_INVOKE_PENDING;
2380 } 4050 }
2381 while (expect_true ( 4051 while (ecb_expect_true (
2382 activecnt 4052 activecnt
2383 && !loop_done 4053 && !loop_done
2384 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 4054 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2385 )); 4055 ));
2386 4056
2387 if (loop_done == EVUNLOOP_ONE) 4057 if (loop_done == EVBREAK_ONE)
2388 loop_done = EVUNLOOP_CANCEL; 4058 loop_done = EVBREAK_CANCEL;
2389 4059
2390#if EV_MINIMAL < 2 4060#if EV_FEATURE_API
2391 --loop_depth; 4061 --loop_depth;
2392#endif 4062#endif
2393}
2394 4063
4064 return activecnt;
4065}
4066
2395void 4067void
2396ev_unloop (EV_P_ int how) 4068ev_break (EV_P_ int how) EV_NOEXCEPT
2397{ 4069{
2398 loop_done = how; 4070 loop_done = how;
2399} 4071}
2400 4072
2401void 4073void
2402ev_ref (EV_P) 4074ev_ref (EV_P) EV_NOEXCEPT
2403{ 4075{
2404 ++activecnt; 4076 ++activecnt;
2405} 4077}
2406 4078
2407void 4079void
2408ev_unref (EV_P) 4080ev_unref (EV_P) EV_NOEXCEPT
2409{ 4081{
2410 --activecnt; 4082 --activecnt;
2411} 4083}
2412 4084
2413void 4085void
2414ev_now_update (EV_P) 4086ev_now_update (EV_P) EV_NOEXCEPT
2415{ 4087{
2416 time_update (EV_A_ 1e100); 4088 time_update (EV_A_ EV_TSTAMP_HUGE);
2417} 4089}
2418 4090
2419void 4091void
2420ev_suspend (EV_P) 4092ev_suspend (EV_P) EV_NOEXCEPT
2421{ 4093{
2422 ev_now_update (EV_A); 4094 ev_now_update (EV_A);
2423} 4095}
2424 4096
2425void 4097void
2426ev_resume (EV_P) 4098ev_resume (EV_P) EV_NOEXCEPT
2427{ 4099{
2428 ev_tstamp mn_prev = mn_now; 4100 ev_tstamp mn_prev = mn_now;
2429 4101
2430 ev_now_update (EV_A); 4102 ev_now_update (EV_A);
2431 timers_reschedule (EV_A_ mn_now - mn_prev); 4103 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2448inline_size void 4120inline_size void
2449wlist_del (WL *head, WL elem) 4121wlist_del (WL *head, WL elem)
2450{ 4122{
2451 while (*head) 4123 while (*head)
2452 { 4124 {
2453 if (expect_true (*head == elem)) 4125 if (ecb_expect_true (*head == elem))
2454 { 4126 {
2455 *head = elem->next; 4127 *head = elem->next;
2456 break; 4128 break;
2457 } 4129 }
2458 4130
… …
2470 w->pending = 0; 4142 w->pending = 0;
2471 } 4143 }
2472} 4144}
2473 4145
2474int 4146int
2475ev_clear_pending (EV_P_ void *w) 4147ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2476{ 4148{
2477 W w_ = (W)w; 4149 W w_ = (W)w;
2478 int pending = w_->pending; 4150 int pending = w_->pending;
2479 4151
2480 if (expect_true (pending)) 4152 if (ecb_expect_true (pending))
2481 { 4153 {
2482 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4154 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2483 p->w = (W)&pending_w; 4155 p->w = (W)&pending_w;
2484 w_->pending = 0; 4156 w_->pending = 0;
2485 return p->events; 4157 return p->events;
… …
2512 w->active = 0; 4184 w->active = 0;
2513} 4185}
2514 4186
2515/*****************************************************************************/ 4187/*****************************************************************************/
2516 4188
2517void noinline 4189ecb_noinline
4190void
2518ev_io_start (EV_P_ ev_io *w) 4191ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2519{ 4192{
2520 int fd = w->fd; 4193 int fd = w->fd;
2521 4194
2522 if (expect_false (ev_is_active (w))) 4195 if (ecb_expect_false (ev_is_active (w)))
2523 return; 4196 return;
2524 4197
2525 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4198 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2526 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 4199 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2527 4200
4201#if EV_VERIFY >= 2
4202 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4203#endif
2528 EV_FREQUENT_CHECK; 4204 EV_FREQUENT_CHECK;
2529 4205
2530 ev_start (EV_A_ (W)w, 1); 4206 ev_start (EV_A_ (W)w, 1);
2531 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4207 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2532 wlist_add (&anfds[fd].head, (WL)w); 4208 wlist_add (&anfds[fd].head, (WL)w);
4209
4210 /* common bug, apparently */
4211 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2533 4212
2534 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 4213 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2535 w->events &= ~EV__IOFDSET; 4214 w->events &= ~EV__IOFDSET;
2536 4215
2537 EV_FREQUENT_CHECK; 4216 EV_FREQUENT_CHECK;
2538} 4217}
2539 4218
2540void noinline 4219ecb_noinline
4220void
2541ev_io_stop (EV_P_ ev_io *w) 4221ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2542{ 4222{
2543 clear_pending (EV_A_ (W)w); 4223 clear_pending (EV_A_ (W)w);
2544 if (expect_false (!ev_is_active (w))) 4224 if (ecb_expect_false (!ev_is_active (w)))
2545 return; 4225 return;
2546 4226
2547 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4227 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2548 4228
4229#if EV_VERIFY >= 2
4230 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4231#endif
2549 EV_FREQUENT_CHECK; 4232 EV_FREQUENT_CHECK;
2550 4233
2551 wlist_del (&anfds[w->fd].head, (WL)w); 4234 wlist_del (&anfds[w->fd].head, (WL)w);
2552 ev_stop (EV_A_ (W)w); 4235 ev_stop (EV_A_ (W)w);
2553 4236
2554 fd_change (EV_A_ w->fd, 1); 4237 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2555 4238
2556 EV_FREQUENT_CHECK; 4239 EV_FREQUENT_CHECK;
2557} 4240}
2558 4241
2559void noinline 4242ecb_noinline
4243void
2560ev_timer_start (EV_P_ ev_timer *w) 4244ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2561{ 4245{
2562 if (expect_false (ev_is_active (w))) 4246 if (ecb_expect_false (ev_is_active (w)))
2563 return; 4247 return;
2564 4248
2565 ev_at (w) += mn_now; 4249 ev_at (w) += mn_now;
2566 4250
2567 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4251 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2568 4252
2569 EV_FREQUENT_CHECK; 4253 EV_FREQUENT_CHECK;
2570 4254
2571 ++timercnt; 4255 ++timercnt;
2572 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4256 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2573 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4257 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2574 ANHE_w (timers [ev_active (w)]) = (WT)w; 4258 ANHE_w (timers [ev_active (w)]) = (WT)w;
2575 ANHE_at_cache (timers [ev_active (w)]); 4259 ANHE_at_cache (timers [ev_active (w)]);
2576 upheap (timers, ev_active (w)); 4260 upheap (timers, ev_active (w));
2577 4261
2578 EV_FREQUENT_CHECK; 4262 EV_FREQUENT_CHECK;
2579 4263
2580 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 4264 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2581} 4265}
2582 4266
2583void noinline 4267ecb_noinline
4268void
2584ev_timer_stop (EV_P_ ev_timer *w) 4269ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2585{ 4270{
2586 clear_pending (EV_A_ (W)w); 4271 clear_pending (EV_A_ (W)w);
2587 if (expect_false (!ev_is_active (w))) 4272 if (ecb_expect_false (!ev_is_active (w)))
2588 return; 4273 return;
2589 4274
2590 EV_FREQUENT_CHECK; 4275 EV_FREQUENT_CHECK;
2591 4276
2592 { 4277 {
… …
2594 4279
2595 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 4280 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2596 4281
2597 --timercnt; 4282 --timercnt;
2598 4283
2599 if (expect_true (active < timercnt + HEAP0)) 4284 if (ecb_expect_true (active < timercnt + HEAP0))
2600 { 4285 {
2601 timers [active] = timers [timercnt + HEAP0]; 4286 timers [active] = timers [timercnt + HEAP0];
2602 adjustheap (timers, timercnt, active); 4287 adjustheap (timers, timercnt, active);
2603 } 4288 }
2604 } 4289 }
… …
2608 ev_stop (EV_A_ (W)w); 4293 ev_stop (EV_A_ (W)w);
2609 4294
2610 EV_FREQUENT_CHECK; 4295 EV_FREQUENT_CHECK;
2611} 4296}
2612 4297
2613void noinline 4298ecb_noinline
4299void
2614ev_timer_again (EV_P_ ev_timer *w) 4300ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2615{ 4301{
2616 EV_FREQUENT_CHECK; 4302 EV_FREQUENT_CHECK;
4303
4304 clear_pending (EV_A_ (W)w);
2617 4305
2618 if (ev_is_active (w)) 4306 if (ev_is_active (w))
2619 { 4307 {
2620 if (w->repeat) 4308 if (w->repeat)
2621 { 4309 {
… …
2634 4322
2635 EV_FREQUENT_CHECK; 4323 EV_FREQUENT_CHECK;
2636} 4324}
2637 4325
2638ev_tstamp 4326ev_tstamp
2639ev_timer_remaining (EV_P_ ev_timer *w) 4327ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2640{ 4328{
2641 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4329 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
2642} 4330}
2643 4331
2644#if EV_PERIODIC_ENABLE 4332#if EV_PERIODIC_ENABLE
2645void noinline 4333ecb_noinline
4334void
2646ev_periodic_start (EV_P_ ev_periodic *w) 4335ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2647{ 4336{
2648 if (expect_false (ev_is_active (w))) 4337 if (ecb_expect_false (ev_is_active (w)))
2649 return; 4338 return;
4339
4340#if EV_USE_TIMERFD
4341 if (timerfd == -2)
4342 evtimerfd_init (EV_A);
4343#endif
2650 4344
2651 if (w->reschedule_cb) 4345 if (w->reschedule_cb)
2652 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4346 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2653 else if (w->interval) 4347 else if (w->interval)
2654 { 4348 {
2655 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4349 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2656 /* this formula differs from the one in periodic_reify because we do not always round up */ 4350 periodic_recalc (EV_A_ w);
2657 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2658 } 4351 }
2659 else 4352 else
2660 ev_at (w) = w->offset; 4353 ev_at (w) = w->offset;
2661 4354
2662 EV_FREQUENT_CHECK; 4355 EV_FREQUENT_CHECK;
2663 4356
2664 ++periodiccnt; 4357 ++periodiccnt;
2665 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4358 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2666 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4359 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2667 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4360 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2668 ANHE_at_cache (periodics [ev_active (w)]); 4361 ANHE_at_cache (periodics [ev_active (w)]);
2669 upheap (periodics, ev_active (w)); 4362 upheap (periodics, ev_active (w));
2670 4363
2671 EV_FREQUENT_CHECK; 4364 EV_FREQUENT_CHECK;
2672 4365
2673 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4366 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2674} 4367}
2675 4368
2676void noinline 4369ecb_noinline
4370void
2677ev_periodic_stop (EV_P_ ev_periodic *w) 4371ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2678{ 4372{
2679 clear_pending (EV_A_ (W)w); 4373 clear_pending (EV_A_ (W)w);
2680 if (expect_false (!ev_is_active (w))) 4374 if (ecb_expect_false (!ev_is_active (w)))
2681 return; 4375 return;
2682 4376
2683 EV_FREQUENT_CHECK; 4377 EV_FREQUENT_CHECK;
2684 4378
2685 { 4379 {
… …
2687 4381
2688 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4382 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2689 4383
2690 --periodiccnt; 4384 --periodiccnt;
2691 4385
2692 if (expect_true (active < periodiccnt + HEAP0)) 4386 if (ecb_expect_true (active < periodiccnt + HEAP0))
2693 { 4387 {
2694 periodics [active] = periodics [periodiccnt + HEAP0]; 4388 periodics [active] = periodics [periodiccnt + HEAP0];
2695 adjustheap (periodics, periodiccnt, active); 4389 adjustheap (periodics, periodiccnt, active);
2696 } 4390 }
2697 } 4391 }
… …
2699 ev_stop (EV_A_ (W)w); 4393 ev_stop (EV_A_ (W)w);
2700 4394
2701 EV_FREQUENT_CHECK; 4395 EV_FREQUENT_CHECK;
2702} 4396}
2703 4397
2704void noinline 4398ecb_noinline
4399void
2705ev_periodic_again (EV_P_ ev_periodic *w) 4400ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2706{ 4401{
2707 /* TODO: use adjustheap and recalculation */ 4402 /* TODO: use adjustheap and recalculation */
2708 ev_periodic_stop (EV_A_ w); 4403 ev_periodic_stop (EV_A_ w);
2709 ev_periodic_start (EV_A_ w); 4404 ev_periodic_start (EV_A_ w);
2710} 4405}
… …
2712 4407
2713#ifndef SA_RESTART 4408#ifndef SA_RESTART
2714# define SA_RESTART 0 4409# define SA_RESTART 0
2715#endif 4410#endif
2716 4411
2717void noinline 4412#if EV_SIGNAL_ENABLE
4413
4414ecb_noinline
4415void
2718ev_signal_start (EV_P_ ev_signal *w) 4416ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2719{ 4417{
2720 if (expect_false (ev_is_active (w))) 4418 if (ecb_expect_false (ev_is_active (w)))
2721 return; 4419 return;
2722 4420
2723 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4421 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2724 4422
2725#if EV_MULTIPLICITY 4423#if EV_MULTIPLICITY
2726 assert (("libev: a signal must not be attached to two different loops", 4424 assert (("libev: a signal must not be attached to two different loops",
2727 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4425 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2728 4426
2729 signals [w->signum - 1].loop = EV_A; 4427 signals [w->signum - 1].loop = EV_A;
4428 ECB_MEMORY_FENCE_RELEASE;
2730#endif 4429#endif
2731 4430
2732 EV_FREQUENT_CHECK; 4431 EV_FREQUENT_CHECK;
2733 4432
2734#if EV_USE_SIGNALFD 4433#if EV_USE_SIGNALFD
… …
2781 sa.sa_handler = ev_sighandler; 4480 sa.sa_handler = ev_sighandler;
2782 sigfillset (&sa.sa_mask); 4481 sigfillset (&sa.sa_mask);
2783 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4482 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2784 sigaction (w->signum, &sa, 0); 4483 sigaction (w->signum, &sa, 0);
2785 4484
4485 if (origflags & EVFLAG_NOSIGMASK)
4486 {
2786 sigemptyset (&sa.sa_mask); 4487 sigemptyset (&sa.sa_mask);
2787 sigaddset (&sa.sa_mask, w->signum); 4488 sigaddset (&sa.sa_mask, w->signum);
2788 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4489 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4490 }
2789#endif 4491#endif
2790 } 4492 }
2791 4493
2792 EV_FREQUENT_CHECK; 4494 EV_FREQUENT_CHECK;
2793} 4495}
2794 4496
2795void noinline 4497ecb_noinline
4498void
2796ev_signal_stop (EV_P_ ev_signal *w) 4499ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2797{ 4500{
2798 clear_pending (EV_A_ (W)w); 4501 clear_pending (EV_A_ (W)w);
2799 if (expect_false (!ev_is_active (w))) 4502 if (ecb_expect_false (!ev_is_active (w)))
2800 return; 4503 return;
2801 4504
2802 EV_FREQUENT_CHECK; 4505 EV_FREQUENT_CHECK;
2803 4506
2804 wlist_del (&signals [w->signum - 1].head, (WL)w); 4507 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2827 } 4530 }
2828 4531
2829 EV_FREQUENT_CHECK; 4532 EV_FREQUENT_CHECK;
2830} 4533}
2831 4534
4535#endif
4536
4537#if EV_CHILD_ENABLE
4538
2832void 4539void
2833ev_child_start (EV_P_ ev_child *w) 4540ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2834{ 4541{
2835#if EV_MULTIPLICITY 4542#if EV_MULTIPLICITY
2836 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4543 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2837#endif 4544#endif
2838 if (expect_false (ev_is_active (w))) 4545 if (ecb_expect_false (ev_is_active (w)))
2839 return; 4546 return;
2840 4547
2841 EV_FREQUENT_CHECK; 4548 EV_FREQUENT_CHECK;
2842 4549
2843 ev_start (EV_A_ (W)w, 1); 4550 ev_start (EV_A_ (W)w, 1);
2844 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4551 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2845 4552
2846 EV_FREQUENT_CHECK; 4553 EV_FREQUENT_CHECK;
2847} 4554}
2848 4555
2849void 4556void
2850ev_child_stop (EV_P_ ev_child *w) 4557ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2851{ 4558{
2852 clear_pending (EV_A_ (W)w); 4559 clear_pending (EV_A_ (W)w);
2853 if (expect_false (!ev_is_active (w))) 4560 if (ecb_expect_false (!ev_is_active (w)))
2854 return; 4561 return;
2855 4562
2856 EV_FREQUENT_CHECK; 4563 EV_FREQUENT_CHECK;
2857 4564
2858 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4565 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2859 ev_stop (EV_A_ (W)w); 4566 ev_stop (EV_A_ (W)w);
2860 4567
2861 EV_FREQUENT_CHECK; 4568 EV_FREQUENT_CHECK;
2862} 4569}
4570
4571#endif
2863 4572
2864#if EV_STAT_ENABLE 4573#if EV_STAT_ENABLE
2865 4574
2866# ifdef _WIN32 4575# ifdef _WIN32
2867# undef lstat 4576# undef lstat
… …
2870 4579
2871#define DEF_STAT_INTERVAL 5.0074891 4580#define DEF_STAT_INTERVAL 5.0074891
2872#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4581#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2873#define MIN_STAT_INTERVAL 0.1074891 4582#define MIN_STAT_INTERVAL 0.1074891
2874 4583
2875static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4584ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2876 4585
2877#if EV_USE_INOTIFY 4586#if EV_USE_INOTIFY
2878 4587
2879/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4588/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2880# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4589# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2881 4590
2882static void noinline 4591ecb_noinline
4592static void
2883infy_add (EV_P_ ev_stat *w) 4593infy_add (EV_P_ ev_stat *w)
2884{ 4594{
2885 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); 4595 w->wd = inotify_add_watch (fs_fd, w->path,
4596 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4597 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4598 | IN_DONT_FOLLOW | IN_MASK_ADD);
2886 4599
2887 if (w->wd >= 0) 4600 if (w->wd >= 0)
2888 { 4601 {
2889 struct statfs sfs; 4602 struct statfs sfs;
2890 4603
… …
2894 4607
2895 if (!fs_2625) 4608 if (!fs_2625)
2896 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4609 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2897 else if (!statfs (w->path, &sfs) 4610 else if (!statfs (w->path, &sfs)
2898 && (sfs.f_type == 0x1373 /* devfs */ 4611 && (sfs.f_type == 0x1373 /* devfs */
4612 || sfs.f_type == 0x4006 /* fat */
4613 || sfs.f_type == 0x4d44 /* msdos */
2899 || sfs.f_type == 0xEF53 /* ext2/3 */ 4614 || sfs.f_type == 0xEF53 /* ext2/3 */
4615 || sfs.f_type == 0x72b6 /* jffs2 */
4616 || sfs.f_type == 0x858458f6 /* ramfs */
4617 || sfs.f_type == 0x5346544e /* ntfs */
2900 || sfs.f_type == 0x3153464a /* jfs */ 4618 || sfs.f_type == 0x3153464a /* jfs */
4619 || sfs.f_type == 0x9123683e /* btrfs */
2901 || sfs.f_type == 0x52654973 /* reiser3 */ 4620 || sfs.f_type == 0x52654973 /* reiser3 */
2902 || sfs.f_type == 0x01021994 /* tempfs */ 4621 || sfs.f_type == 0x01021994 /* tmpfs */
2903 || sfs.f_type == 0x58465342 /* xfs */)) 4622 || sfs.f_type == 0x58465342 /* xfs */))
2904 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4623 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2905 else 4624 else
2906 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4625 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2907 } 4626 }
… …
2928 if (!pend || pend == path) 4647 if (!pend || pend == path)
2929 break; 4648 break;
2930 4649
2931 *pend = 0; 4650 *pend = 0;
2932 w->wd = inotify_add_watch (fs_fd, path, mask); 4651 w->wd = inotify_add_watch (fs_fd, path, mask);
2933 } 4652 }
2934 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4653 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2935 } 4654 }
2936 } 4655 }
2937 4656
2938 if (w->wd >= 0) 4657 if (w->wd >= 0)
2939 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4658 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2940 4659
2941 /* now re-arm timer, if required */ 4660 /* now re-arm timer, if required */
2942 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4661 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2943 ev_timer_again (EV_A_ &w->timer); 4662 ev_timer_again (EV_A_ &w->timer);
2944 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4663 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2945} 4664}
2946 4665
2947static void noinline 4666ecb_noinline
4667static void
2948infy_del (EV_P_ ev_stat *w) 4668infy_del (EV_P_ ev_stat *w)
2949{ 4669{
2950 int slot; 4670 int slot;
2951 int wd = w->wd; 4671 int wd = w->wd;
2952 4672
2953 if (wd < 0) 4673 if (wd < 0)
2954 return; 4674 return;
2955 4675
2956 w->wd = -2; 4676 w->wd = -2;
2957 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4677 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2958 wlist_del (&fs_hash [slot].head, (WL)w); 4678 wlist_del (&fs_hash [slot].head, (WL)w);
2959 4679
2960 /* remove this watcher, if others are watching it, they will rearm */ 4680 /* remove this watcher, if others are watching it, they will rearm */
2961 inotify_rm_watch (fs_fd, wd); 4681 inotify_rm_watch (fs_fd, wd);
2962} 4682}
2963 4683
2964static void noinline 4684ecb_noinline
4685static void
2965infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4686infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2966{ 4687{
2967 if (slot < 0) 4688 if (slot < 0)
2968 /* overflow, need to check for all hash slots */ 4689 /* overflow, need to check for all hash slots */
2969 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4690 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2970 infy_wd (EV_A_ slot, wd, ev); 4691 infy_wd (EV_A_ slot, wd, ev);
2971 else 4692 else
2972 { 4693 {
2973 WL w_; 4694 WL w_;
2974 4695
2975 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4696 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2976 { 4697 {
2977 ev_stat *w = (ev_stat *)w_; 4698 ev_stat *w = (ev_stat *)w_;
2978 w_ = w_->next; /* lets us remove this watcher and all before it */ 4699 w_ = w_->next; /* lets us remove this watcher and all before it */
2979 4700
2980 if (w->wd == wd || wd == -1) 4701 if (w->wd == wd || wd == -1)
2981 { 4702 {
2982 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4703 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2983 { 4704 {
2984 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4705 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2985 w->wd = -1; 4706 w->wd = -1;
2986 infy_add (EV_A_ w); /* re-add, no matter what */ 4707 infy_add (EV_A_ w); /* re-add, no matter what */
2987 } 4708 }
2988 4709
2989 stat_timer_cb (EV_A_ &w->timer, 0); 4710 stat_timer_cb (EV_A_ &w->timer, 0);
… …
3005 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4726 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3006 ofs += sizeof (struct inotify_event) + ev->len; 4727 ofs += sizeof (struct inotify_event) + ev->len;
3007 } 4728 }
3008} 4729}
3009 4730
3010inline_size unsigned int
3011ev_linux_version (void)
3012{
3013 struct utsname buf;
3014 unsigned int v;
3015 int i;
3016 char *p = buf.release;
3017
3018 if (uname (&buf))
3019 return 0;
3020
3021 for (i = 3+1; --i; )
3022 {
3023 unsigned int c = 0;
3024
3025 for (;;)
3026 {
3027 if (*p >= '0' && *p <= '9')
3028 c = c * 10 + *p++ - '0';
3029 else
3030 {
3031 p += *p == '.';
3032 break;
3033 }
3034 }
3035
3036 v = (v << 8) | c;
3037 }
3038
3039 return v;
3040}
3041
3042inline_size void 4731inline_size ecb_cold
4732void
3043ev_check_2625 (EV_P) 4733ev_check_2625 (EV_P)
3044{ 4734{
3045 /* kernels < 2.6.25 are borked 4735 /* kernels < 2.6.25 are borked
3046 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4736 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3047 */ 4737 */
… …
3052} 4742}
3053 4743
3054inline_size int 4744inline_size int
3055infy_newfd (void) 4745infy_newfd (void)
3056{ 4746{
3057#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4747#if defined IN_CLOEXEC && defined IN_NONBLOCK
3058 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4748 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3059 if (fd >= 0) 4749 if (fd >= 0)
3060 return fd; 4750 return fd;
3061#endif 4751#endif
3062 return inotify_init (); 4752 return inotify_init ();
… …
3103 ev_io_set (&fs_w, fs_fd, EV_READ); 4793 ev_io_set (&fs_w, fs_fd, EV_READ);
3104 ev_io_start (EV_A_ &fs_w); 4794 ev_io_start (EV_A_ &fs_w);
3105 ev_unref (EV_A); 4795 ev_unref (EV_A);
3106 } 4796 }
3107 4797
3108 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4798 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3109 { 4799 {
3110 WL w_ = fs_hash [slot].head; 4800 WL w_ = fs_hash [slot].head;
3111 fs_hash [slot].head = 0; 4801 fs_hash [slot].head = 0;
3112 4802
3113 while (w_) 4803 while (w_)
… …
3137#else 4827#else
3138# define EV_LSTAT(p,b) lstat (p, b) 4828# define EV_LSTAT(p,b) lstat (p, b)
3139#endif 4829#endif
3140 4830
3141void 4831void
3142ev_stat_stat (EV_P_ ev_stat *w) 4832ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3143{ 4833{
3144 if (lstat (w->path, &w->attr) < 0) 4834 if (lstat (w->path, &w->attr) < 0)
3145 w->attr.st_nlink = 0; 4835 w->attr.st_nlink = 0;
3146 else if (!w->attr.st_nlink) 4836 else if (!w->attr.st_nlink)
3147 w->attr.st_nlink = 1; 4837 w->attr.st_nlink = 1;
3148} 4838}
3149 4839
3150static void noinline 4840ecb_noinline
4841static void
3151stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4842stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3152{ 4843{
3153 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4844 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3154 4845
3155 ev_statdata prev = w->attr; 4846 ev_statdata prev = w->attr;
… …
3186 ev_feed_event (EV_A_ w, EV_STAT); 4877 ev_feed_event (EV_A_ w, EV_STAT);
3187 } 4878 }
3188} 4879}
3189 4880
3190void 4881void
3191ev_stat_start (EV_P_ ev_stat *w) 4882ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3192{ 4883{
3193 if (expect_false (ev_is_active (w))) 4884 if (ecb_expect_false (ev_is_active (w)))
3194 return; 4885 return;
3195 4886
3196 ev_stat_stat (EV_A_ w); 4887 ev_stat_stat (EV_A_ w);
3197 4888
3198 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4889 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3217 4908
3218 EV_FREQUENT_CHECK; 4909 EV_FREQUENT_CHECK;
3219} 4910}
3220 4911
3221void 4912void
3222ev_stat_stop (EV_P_ ev_stat *w) 4913ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3223{ 4914{
3224 clear_pending (EV_A_ (W)w); 4915 clear_pending (EV_A_ (W)w);
3225 if (expect_false (!ev_is_active (w))) 4916 if (ecb_expect_false (!ev_is_active (w)))
3226 return; 4917 return;
3227 4918
3228 EV_FREQUENT_CHECK; 4919 EV_FREQUENT_CHECK;
3229 4920
3230#if EV_USE_INOTIFY 4921#if EV_USE_INOTIFY
… …
3243} 4934}
3244#endif 4935#endif
3245 4936
3246#if EV_IDLE_ENABLE 4937#if EV_IDLE_ENABLE
3247void 4938void
3248ev_idle_start (EV_P_ ev_idle *w) 4939ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3249{ 4940{
3250 if (expect_false (ev_is_active (w))) 4941 if (ecb_expect_false (ev_is_active (w)))
3251 return; 4942 return;
3252 4943
3253 pri_adjust (EV_A_ (W)w); 4944 pri_adjust (EV_A_ (W)w);
3254 4945
3255 EV_FREQUENT_CHECK; 4946 EV_FREQUENT_CHECK;
… …
3258 int active = ++idlecnt [ABSPRI (w)]; 4949 int active = ++idlecnt [ABSPRI (w)];
3259 4950
3260 ++idleall; 4951 ++idleall;
3261 ev_start (EV_A_ (W)w, active); 4952 ev_start (EV_A_ (W)w, active);
3262 4953
3263 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4954 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3264 idles [ABSPRI (w)][active - 1] = w; 4955 idles [ABSPRI (w)][active - 1] = w;
3265 } 4956 }
3266 4957
3267 EV_FREQUENT_CHECK; 4958 EV_FREQUENT_CHECK;
3268} 4959}
3269 4960
3270void 4961void
3271ev_idle_stop (EV_P_ ev_idle *w) 4962ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3272{ 4963{
3273 clear_pending (EV_A_ (W)w); 4964 clear_pending (EV_A_ (W)w);
3274 if (expect_false (!ev_is_active (w))) 4965 if (ecb_expect_false (!ev_is_active (w)))
3275 return; 4966 return;
3276 4967
3277 EV_FREQUENT_CHECK; 4968 EV_FREQUENT_CHECK;
3278 4969
3279 { 4970 {
… …
3288 4979
3289 EV_FREQUENT_CHECK; 4980 EV_FREQUENT_CHECK;
3290} 4981}
3291#endif 4982#endif
3292 4983
4984#if EV_PREPARE_ENABLE
3293void 4985void
3294ev_prepare_start (EV_P_ ev_prepare *w) 4986ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3295{ 4987{
3296 if (expect_false (ev_is_active (w))) 4988 if (ecb_expect_false (ev_is_active (w)))
3297 return; 4989 return;
3298 4990
3299 EV_FREQUENT_CHECK; 4991 EV_FREQUENT_CHECK;
3300 4992
3301 ev_start (EV_A_ (W)w, ++preparecnt); 4993 ev_start (EV_A_ (W)w, ++preparecnt);
3302 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4994 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3303 prepares [preparecnt - 1] = w; 4995 prepares [preparecnt - 1] = w;
3304 4996
3305 EV_FREQUENT_CHECK; 4997 EV_FREQUENT_CHECK;
3306} 4998}
3307 4999
3308void 5000void
3309ev_prepare_stop (EV_P_ ev_prepare *w) 5001ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3310{ 5002{
3311 clear_pending (EV_A_ (W)w); 5003 clear_pending (EV_A_ (W)w);
3312 if (expect_false (!ev_is_active (w))) 5004 if (ecb_expect_false (!ev_is_active (w)))
3313 return; 5005 return;
3314 5006
3315 EV_FREQUENT_CHECK; 5007 EV_FREQUENT_CHECK;
3316 5008
3317 { 5009 {
… …
3323 5015
3324 ev_stop (EV_A_ (W)w); 5016 ev_stop (EV_A_ (W)w);
3325 5017
3326 EV_FREQUENT_CHECK; 5018 EV_FREQUENT_CHECK;
3327} 5019}
5020#endif
3328 5021
5022#if EV_CHECK_ENABLE
3329void 5023void
3330ev_check_start (EV_P_ ev_check *w) 5024ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3331{ 5025{
3332 if (expect_false (ev_is_active (w))) 5026 if (ecb_expect_false (ev_is_active (w)))
3333 return; 5027 return;
3334 5028
3335 EV_FREQUENT_CHECK; 5029 EV_FREQUENT_CHECK;
3336 5030
3337 ev_start (EV_A_ (W)w, ++checkcnt); 5031 ev_start (EV_A_ (W)w, ++checkcnt);
3338 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5032 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3339 checks [checkcnt - 1] = w; 5033 checks [checkcnt - 1] = w;
3340 5034
3341 EV_FREQUENT_CHECK; 5035 EV_FREQUENT_CHECK;
3342} 5036}
3343 5037
3344void 5038void
3345ev_check_stop (EV_P_ ev_check *w) 5039ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3346{ 5040{
3347 clear_pending (EV_A_ (W)w); 5041 clear_pending (EV_A_ (W)w);
3348 if (expect_false (!ev_is_active (w))) 5042 if (ecb_expect_false (!ev_is_active (w)))
3349 return; 5043 return;
3350 5044
3351 EV_FREQUENT_CHECK; 5045 EV_FREQUENT_CHECK;
3352 5046
3353 { 5047 {
… …
3359 5053
3360 ev_stop (EV_A_ (W)w); 5054 ev_stop (EV_A_ (W)w);
3361 5055
3362 EV_FREQUENT_CHECK; 5056 EV_FREQUENT_CHECK;
3363} 5057}
5058#endif
3364 5059
3365#if EV_EMBED_ENABLE 5060#if EV_EMBED_ENABLE
3366void noinline 5061ecb_noinline
5062void
3367ev_embed_sweep (EV_P_ ev_embed *w) 5063ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3368{ 5064{
3369 ev_loop (w->other, EVLOOP_NONBLOCK); 5065 ev_run (w->other, EVRUN_NOWAIT);
3370} 5066}
3371 5067
3372static void 5068static void
3373embed_io_cb (EV_P_ ev_io *io, int revents) 5069embed_io_cb (EV_P_ ev_io *io, int revents)
3374{ 5070{
3375 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 5071 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3376 5072
3377 if (ev_cb (w)) 5073 if (ev_cb (w))
3378 ev_feed_event (EV_A_ (W)w, EV_EMBED); 5074 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3379 else 5075 else
3380 ev_loop (w->other, EVLOOP_NONBLOCK); 5076 ev_run (w->other, EVRUN_NOWAIT);
3381} 5077}
3382 5078
3383static void 5079static void
3384embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 5080embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3385{ 5081{
… …
3389 EV_P = w->other; 5085 EV_P = w->other;
3390 5086
3391 while (fdchangecnt) 5087 while (fdchangecnt)
3392 { 5088 {
3393 fd_reify (EV_A); 5089 fd_reify (EV_A);
3394 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5090 ev_run (EV_A_ EVRUN_NOWAIT);
3395 } 5091 }
3396 } 5092 }
3397} 5093}
3398 5094
5095#if EV_FORK_ENABLE
3399static void 5096static void
3400embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5097embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3401{ 5098{
3402 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5099 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3403 5100
… …
3405 5102
3406 { 5103 {
3407 EV_P = w->other; 5104 EV_P = w->other;
3408 5105
3409 ev_loop_fork (EV_A); 5106 ev_loop_fork (EV_A);
3410 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5107 ev_run (EV_A_ EVRUN_NOWAIT);
3411 } 5108 }
3412 5109
3413 ev_embed_start (EV_A_ w); 5110 ev_embed_start (EV_A_ w);
3414} 5111}
5112#endif
3415 5113
3416#if 0 5114#if 0
3417static void 5115static void
3418embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5116embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3419{ 5117{
3420 ev_idle_stop (EV_A_ idle); 5118 ev_idle_stop (EV_A_ idle);
3421} 5119}
3422#endif 5120#endif
3423 5121
3424void 5122void
3425ev_embed_start (EV_P_ ev_embed *w) 5123ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3426{ 5124{
3427 if (expect_false (ev_is_active (w))) 5125 if (ecb_expect_false (ev_is_active (w)))
3428 return; 5126 return;
3429 5127
3430 { 5128 {
3431 EV_P = w->other; 5129 EV_P = w->other;
3432 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 5130 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
… …
3440 5138
3441 ev_prepare_init (&w->prepare, embed_prepare_cb); 5139 ev_prepare_init (&w->prepare, embed_prepare_cb);
3442 ev_set_priority (&w->prepare, EV_MINPRI); 5140 ev_set_priority (&w->prepare, EV_MINPRI);
3443 ev_prepare_start (EV_A_ &w->prepare); 5141 ev_prepare_start (EV_A_ &w->prepare);
3444 5142
5143#if EV_FORK_ENABLE
3445 ev_fork_init (&w->fork, embed_fork_cb); 5144 ev_fork_init (&w->fork, embed_fork_cb);
3446 ev_fork_start (EV_A_ &w->fork); 5145 ev_fork_start (EV_A_ &w->fork);
5146#endif
3447 5147
3448 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5148 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3449 5149
3450 ev_start (EV_A_ (W)w, 1); 5150 ev_start (EV_A_ (W)w, 1);
3451 5151
3452 EV_FREQUENT_CHECK; 5152 EV_FREQUENT_CHECK;
3453} 5153}
3454 5154
3455void 5155void
3456ev_embed_stop (EV_P_ ev_embed *w) 5156ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3457{ 5157{
3458 clear_pending (EV_A_ (W)w); 5158 clear_pending (EV_A_ (W)w);
3459 if (expect_false (!ev_is_active (w))) 5159 if (ecb_expect_false (!ev_is_active (w)))
3460 return; 5160 return;
3461 5161
3462 EV_FREQUENT_CHECK; 5162 EV_FREQUENT_CHECK;
3463 5163
3464 ev_io_stop (EV_A_ &w->io); 5164 ev_io_stop (EV_A_ &w->io);
3465 ev_prepare_stop (EV_A_ &w->prepare); 5165 ev_prepare_stop (EV_A_ &w->prepare);
5166#if EV_FORK_ENABLE
3466 ev_fork_stop (EV_A_ &w->fork); 5167 ev_fork_stop (EV_A_ &w->fork);
5168#endif
3467 5169
3468 ev_stop (EV_A_ (W)w); 5170 ev_stop (EV_A_ (W)w);
3469 5171
3470 EV_FREQUENT_CHECK; 5172 EV_FREQUENT_CHECK;
3471} 5173}
3472#endif 5174#endif
3473 5175
3474#if EV_FORK_ENABLE 5176#if EV_FORK_ENABLE
3475void 5177void
3476ev_fork_start (EV_P_ ev_fork *w) 5178ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3477{ 5179{
3478 if (expect_false (ev_is_active (w))) 5180 if (ecb_expect_false (ev_is_active (w)))
3479 return; 5181 return;
3480 5182
3481 EV_FREQUENT_CHECK; 5183 EV_FREQUENT_CHECK;
3482 5184
3483 ev_start (EV_A_ (W)w, ++forkcnt); 5185 ev_start (EV_A_ (W)w, ++forkcnt);
3484 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5186 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3485 forks [forkcnt - 1] = w; 5187 forks [forkcnt - 1] = w;
3486 5188
3487 EV_FREQUENT_CHECK; 5189 EV_FREQUENT_CHECK;
3488} 5190}
3489 5191
3490void 5192void
3491ev_fork_stop (EV_P_ ev_fork *w) 5193ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3492{ 5194{
3493 clear_pending (EV_A_ (W)w); 5195 clear_pending (EV_A_ (W)w);
3494 if (expect_false (!ev_is_active (w))) 5196 if (ecb_expect_false (!ev_is_active (w)))
3495 return; 5197 return;
3496 5198
3497 EV_FREQUENT_CHECK; 5199 EV_FREQUENT_CHECK;
3498 5200
3499 { 5201 {
… …
3507 5209
3508 EV_FREQUENT_CHECK; 5210 EV_FREQUENT_CHECK;
3509} 5211}
3510#endif 5212#endif
3511 5213
5214#if EV_CLEANUP_ENABLE
5215void
5216ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5217{
5218 if (ecb_expect_false (ev_is_active (w)))
5219 return;
5220
5221 EV_FREQUENT_CHECK;
5222
5223 ev_start (EV_A_ (W)w, ++cleanupcnt);
5224 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5225 cleanups [cleanupcnt - 1] = w;
5226
5227 /* cleanup watchers should never keep a refcount on the loop */
5228 ev_unref (EV_A);
5229 EV_FREQUENT_CHECK;
5230}
5231
5232void
5233ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5234{
5235 clear_pending (EV_A_ (W)w);
5236 if (ecb_expect_false (!ev_is_active (w)))
5237 return;
5238
5239 EV_FREQUENT_CHECK;
5240 ev_ref (EV_A);
5241
5242 {
5243 int active = ev_active (w);
5244
5245 cleanups [active - 1] = cleanups [--cleanupcnt];
5246 ev_active (cleanups [active - 1]) = active;
5247 }
5248
5249 ev_stop (EV_A_ (W)w);
5250
5251 EV_FREQUENT_CHECK;
5252}
5253#endif
5254
3512#if EV_ASYNC_ENABLE 5255#if EV_ASYNC_ENABLE
3513void 5256void
3514ev_async_start (EV_P_ ev_async *w) 5257ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3515{ 5258{
3516 if (expect_false (ev_is_active (w))) 5259 if (ecb_expect_false (ev_is_active (w)))
3517 return; 5260 return;
3518 5261
5262 w->sent = 0;
5263
3519 evpipe_init (EV_A); 5264 evpipe_init (EV_A);
3520 5265
3521 EV_FREQUENT_CHECK; 5266 EV_FREQUENT_CHECK;
3522 5267
3523 ev_start (EV_A_ (W)w, ++asynccnt); 5268 ev_start (EV_A_ (W)w, ++asynccnt);
3524 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5269 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3525 asyncs [asynccnt - 1] = w; 5270 asyncs [asynccnt - 1] = w;
3526 5271
3527 EV_FREQUENT_CHECK; 5272 EV_FREQUENT_CHECK;
3528} 5273}
3529 5274
3530void 5275void
3531ev_async_stop (EV_P_ ev_async *w) 5276ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3532{ 5277{
3533 clear_pending (EV_A_ (W)w); 5278 clear_pending (EV_A_ (W)w);
3534 if (expect_false (!ev_is_active (w))) 5279 if (ecb_expect_false (!ev_is_active (w)))
3535 return; 5280 return;
3536 5281
3537 EV_FREQUENT_CHECK; 5282 EV_FREQUENT_CHECK;
3538 5283
3539 { 5284 {
… …
3547 5292
3548 EV_FREQUENT_CHECK; 5293 EV_FREQUENT_CHECK;
3549} 5294}
3550 5295
3551void 5296void
3552ev_async_send (EV_P_ ev_async *w) 5297ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3553{ 5298{
3554 w->sent = 1; 5299 w->sent = 1;
3555 evpipe_write (EV_A_ &async_pending); 5300 evpipe_write (EV_A_ &async_pending);
3556} 5301}
3557#endif 5302#endif
… …
3594 5339
3595 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5340 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3596} 5341}
3597 5342
3598void 5343void
3599ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5344ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3600{ 5345{
3601 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5346 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3602
3603 if (expect_false (!once))
3604 {
3605 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3606 return;
3607 }
3608 5347
3609 once->cb = cb; 5348 once->cb = cb;
3610 once->arg = arg; 5349 once->arg = arg;
3611 5350
3612 ev_init (&once->io, once_cb_io); 5351 ev_init (&once->io, once_cb_io);
… …
3625} 5364}
3626 5365
3627/*****************************************************************************/ 5366/*****************************************************************************/
3628 5367
3629#if EV_WALK_ENABLE 5368#if EV_WALK_ENABLE
5369ecb_cold
3630void 5370void
3631ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5371ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3632{ 5372{
3633 int i, j; 5373 int i, j;
3634 ev_watcher_list *wl, *wn; 5374 ev_watcher_list *wl, *wn;
3635 5375
3636 if (types & (EV_IO | EV_EMBED)) 5376 if (types & (EV_IO | EV_EMBED))
… …
3679 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5419 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3680#endif 5420#endif
3681 5421
3682#if EV_IDLE_ENABLE 5422#if EV_IDLE_ENABLE
3683 if (types & EV_IDLE) 5423 if (types & EV_IDLE)
3684 for (j = NUMPRI; i--; ) 5424 for (j = NUMPRI; j--; )
3685 for (i = idlecnt [j]; i--; ) 5425 for (i = idlecnt [j]; i--; )
3686 cb (EV_A_ EV_IDLE, idles [j][i]); 5426 cb (EV_A_ EV_IDLE, idles [j][i]);
3687#endif 5427#endif
3688 5428
3689#if EV_FORK_ENABLE 5429#if EV_FORK_ENABLE
… …
3697 if (types & EV_ASYNC) 5437 if (types & EV_ASYNC)
3698 for (i = asynccnt; i--; ) 5438 for (i = asynccnt; i--; )
3699 cb (EV_A_ EV_ASYNC, asyncs [i]); 5439 cb (EV_A_ EV_ASYNC, asyncs [i]);
3700#endif 5440#endif
3701 5441
5442#if EV_PREPARE_ENABLE
3702 if (types & EV_PREPARE) 5443 if (types & EV_PREPARE)
3703 for (i = preparecnt; i--; ) 5444 for (i = preparecnt; i--; )
3704#if EV_EMBED_ENABLE 5445# if EV_EMBED_ENABLE
3705 if (ev_cb (prepares [i]) != embed_prepare_cb) 5446 if (ev_cb (prepares [i]) != embed_prepare_cb)
3706#endif 5447# endif
3707 cb (EV_A_ EV_PREPARE, prepares [i]); 5448 cb (EV_A_ EV_PREPARE, prepares [i]);
5449#endif
3708 5450
5451#if EV_CHECK_ENABLE
3709 if (types & EV_CHECK) 5452 if (types & EV_CHECK)
3710 for (i = checkcnt; i--; ) 5453 for (i = checkcnt; i--; )
3711 cb (EV_A_ EV_CHECK, checks [i]); 5454 cb (EV_A_ EV_CHECK, checks [i]);
5455#endif
3712 5456
5457#if EV_SIGNAL_ENABLE
3713 if (types & EV_SIGNAL) 5458 if (types & EV_SIGNAL)
3714 for (i = 0; i < EV_NSIG - 1; ++i) 5459 for (i = 0; i < EV_NSIG - 1; ++i)
3715 for (wl = signals [i].head; wl; ) 5460 for (wl = signals [i].head; wl; )
3716 { 5461 {
3717 wn = wl->next; 5462 wn = wl->next;
3718 cb (EV_A_ EV_SIGNAL, wl); 5463 cb (EV_A_ EV_SIGNAL, wl);
3719 wl = wn; 5464 wl = wn;
3720 } 5465 }
5466#endif
3721 5467
5468#if EV_CHILD_ENABLE
3722 if (types & EV_CHILD) 5469 if (types & EV_CHILD)
3723 for (i = EV_PID_HASHSIZE; i--; ) 5470 for (i = (EV_PID_HASHSIZE); i--; )
3724 for (wl = childs [i]; wl; ) 5471 for (wl = childs [i]; wl; )
3725 { 5472 {
3726 wn = wl->next; 5473 wn = wl->next;
3727 cb (EV_A_ EV_CHILD, wl); 5474 cb (EV_A_ EV_CHILD, wl);
3728 wl = wn; 5475 wl = wn;
3729 } 5476 }
5477#endif
3730/* EV_STAT 0x00001000 /* stat data changed */ 5478/* EV_STAT 0x00001000 /* stat data changed */
3731/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5479/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3732} 5480}
3733#endif 5481#endif
3734 5482
3735#if EV_MULTIPLICITY 5483#if EV_MULTIPLICITY
3736 #include "ev_wrap.h" 5484 #include "ev_wrap.h"
3737#endif 5485#endif
3738 5486
3739#ifdef __cplusplus
3740}
3741#endif
3742

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