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Comparing libev/ev.c (file contents):
Revision 1.334 by root, Tue Mar 9 09:00:59 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
189# undef EV_AVOID_STDIO 248# undef EV_AVOID_STDIO
190#endif 249#endif
191 250
192/* 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 */
193 252
194/* try to deduce the maximum number of signals on this platform */ 253/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 254#if defined EV_NSIG
196/* use what's provided */ 255/* use what's provided */
197#elif defined (NSIG) 256#elif defined NSIG
198# define EV_NSIG (NSIG) 257# define EV_NSIG (NSIG)
199#elif defined(_NSIG) 258#elif defined _NSIG
200# define EV_NSIG (_NSIG) 259# define EV_NSIG (_NSIG)
201#elif defined (SIGMAX) 260#elif defined SIGMAX
202# define EV_NSIG (SIGMAX+1) 261# define EV_NSIG (SIGMAX+1)
203#elif defined (SIG_MAX) 262#elif defined SIG_MAX
204# define EV_NSIG (SIG_MAX+1) 263# define EV_NSIG (SIG_MAX+1)
205#elif defined (_SIG_MAX) 264#elif defined _SIG_MAX
206# define EV_NSIG (_SIG_MAX+1) 265# define EV_NSIG (_SIG_MAX+1)
207#elif defined (MAXSIG) 266#elif defined MAXSIG
208# define EV_NSIG (MAXSIG+1) 267# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG) 268#elif defined MAX_SIG
210# define EV_NSIG (MAX_SIG+1) 269# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE) 270#elif defined SIGARRAYSIZE
212# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 271# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig) 272#elif defined _sys_nsig
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 273# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else 274#else
216# error "unable to find value for NSIG, please report" 275# define EV_NSIG (8 * sizeof (sigset_t) + 1)
217/* to make it compile regardless, just remove the above line */ 276#endif
218# define EV_NSIG 65 277
278#ifndef EV_USE_FLOOR
279# define EV_USE_FLOOR 0
219#endif 280#endif
220 281
221#ifndef EV_USE_CLOCK_SYSCALL 282#ifndef EV_USE_CLOCK_SYSCALL
222# if __linux && __GLIBC__ >= 2 283# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
223# define EV_USE_CLOCK_SYSCALL 1 284# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
224# else 285# else
225# define EV_USE_CLOCK_SYSCALL 0 286# define EV_USE_CLOCK_SYSCALL 0
226# endif 287# endif
227#endif 288#endif
228 289
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
229#ifndef EV_USE_MONOTONIC 299#ifndef EV_USE_MONOTONIC
230# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 300# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
231# define EV_USE_MONOTONIC 1 301# define EV_USE_MONOTONIC EV_FEATURE_OS
232# else 302# else
233# define EV_USE_MONOTONIC 0 303# define EV_USE_MONOTONIC 0
234# endif 304# endif
235#endif 305#endif
236 306
… …
238# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 308# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
239#endif 309#endif
240 310
241#ifndef EV_USE_NANOSLEEP 311#ifndef EV_USE_NANOSLEEP
242# if _POSIX_C_SOURCE >= 199309L 312# if _POSIX_C_SOURCE >= 199309L
243# define EV_USE_NANOSLEEP 1 313# define EV_USE_NANOSLEEP EV_FEATURE_OS
244# else 314# else
245# define EV_USE_NANOSLEEP 0 315# define EV_USE_NANOSLEEP 0
246# endif 316# endif
247#endif 317#endif
248 318
249#ifndef EV_USE_SELECT 319#ifndef EV_USE_SELECT
250# define EV_USE_SELECT 1 320# define EV_USE_SELECT EV_FEATURE_BACKENDS
251#endif 321#endif
252 322
253#ifndef EV_USE_POLL 323#ifndef EV_USE_POLL
254# ifdef _WIN32 324# ifdef _WIN32
255# define EV_USE_POLL 0 325# define EV_USE_POLL 0
256# else 326# else
257# define EV_USE_POLL 1 327# define EV_USE_POLL EV_FEATURE_BACKENDS
258# endif 328# endif
259#endif 329#endif
260 330
261#ifndef EV_USE_EPOLL 331#ifndef EV_USE_EPOLL
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 332# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
263# define EV_USE_EPOLL 1 333# define EV_USE_EPOLL EV_FEATURE_BACKENDS
264# else 334# else
265# define EV_USE_EPOLL 0 335# define EV_USE_EPOLL 0
266# endif 336# endif
267#endif 337#endif
268 338
… …
272 342
273#ifndef EV_USE_PORT 343#ifndef EV_USE_PORT
274# define EV_USE_PORT 0 344# define EV_USE_PORT 0
275#endif 345#endif
276 346
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
277#ifndef EV_USE_INOTIFY 363#ifndef EV_USE_INOTIFY
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 364# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_INOTIFY 1 365# define EV_USE_INOTIFY EV_FEATURE_OS
280# else 366# else
281# define EV_USE_INOTIFY 0 367# define EV_USE_INOTIFY 0
282# endif 368# endif
283#endif 369#endif
284 370
285#ifndef EV_PID_HASHSIZE 371#ifndef EV_PID_HASHSIZE
286# if EV_MINIMAL 372# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
287# define EV_PID_HASHSIZE 1
288# else
289# define EV_PID_HASHSIZE 16
290# endif
291#endif 373#endif
292 374
293#ifndef EV_INOTIFY_HASHSIZE 375#ifndef EV_INOTIFY_HASHSIZE
294# if EV_MINIMAL 376# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
295# define EV_INOTIFY_HASHSIZE 1
296# else
297# define EV_INOTIFY_HASHSIZE 16
298# endif
299#endif 377#endif
300 378
301#ifndef EV_USE_EVENTFD 379#ifndef EV_USE_EVENTFD
302# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 380# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
303# define EV_USE_EVENTFD 1 381# define EV_USE_EVENTFD EV_FEATURE_OS
304# else 382# else
305# define EV_USE_EVENTFD 0 383# define EV_USE_EVENTFD 0
306# endif 384# endif
307#endif 385#endif
308 386
309#ifndef EV_USE_SIGNALFD 387#ifndef EV_USE_SIGNALFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 388# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_SIGNALFD 1 389# define EV_USE_SIGNALFD EV_FEATURE_OS
312# else 390# else
313# 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
314# endif 400# endif
315#endif 401#endif
316 402
317#if 0 /* debugging */ 403#if 0 /* debugging */
318# define EV_VERIFY 3 404# define EV_VERIFY 3
319# define EV_USE_4HEAP 1 405# define EV_USE_4HEAP 1
320# define EV_HEAP_CACHE_AT 1 406# define EV_HEAP_CACHE_AT 1
321#endif 407#endif
322 408
323#ifndef EV_VERIFY 409#ifndef EV_VERIFY
324# define EV_VERIFY !EV_MINIMAL 410# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
325#endif 411#endif
326 412
327#ifndef EV_USE_4HEAP 413#ifndef EV_USE_4HEAP
328# define EV_USE_4HEAP !EV_MINIMAL 414# define EV_USE_4HEAP EV_FEATURE_DATA
329#endif 415#endif
330 416
331#ifndef EV_HEAP_CACHE_AT 417#ifndef EV_HEAP_CACHE_AT
332# 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
333#endif 435#endif
334 436
335/* 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, */
336/* which makes programs even slower. might work on other unices, too. */ 438/* which makes programs even slower. might work on other unices, too. */
337#if EV_USE_CLOCK_SYSCALL 439#if EV_USE_CLOCK_SYSCALL
338# include <syscall.h> 440# include <sys/syscall.h>
339# ifdef SYS_clock_gettime 441# ifdef SYS_clock_gettime
340# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 442# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
341# undef EV_USE_MONOTONIC 443# undef EV_USE_MONOTONIC
342# define EV_USE_MONOTONIC 1 444# define EV_USE_MONOTONIC 1
445# define EV_NEED_SYSCALL 1
343# else 446# else
344# undef EV_USE_CLOCK_SYSCALL 447# undef EV_USE_CLOCK_SYSCALL
345# define EV_USE_CLOCK_SYSCALL 0 448# define EV_USE_CLOCK_SYSCALL 0
346# endif 449# endif
347#endif 450#endif
348 451
349/* 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 */
350 453
351#ifdef _AIX
352/* AIX has a completely broken poll.h header */
353# undef EV_USE_POLL
354# define EV_USE_POLL 0
355#endif
356
357#ifndef CLOCK_MONOTONIC 454#ifndef CLOCK_MONOTONIC
358# undef EV_USE_MONOTONIC 455# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 0 456# define EV_USE_MONOTONIC 0
360#endif 457#endif
361 458
… …
367#if !EV_STAT_ENABLE 464#if !EV_STAT_ENABLE
368# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
369# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
370#endif 467#endif
371 468
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
372#if !EV_USE_NANOSLEEP 477#if !EV_USE_NANOSLEEP
373# ifndef _WIN32 478/* hp-ux has it in sys/time.h, which we unconditionally include above */
479# if !defined _WIN32 && !defined __hpux
374# include <sys/select.h> 480# include <sys/select.h>
375# endif 481# endif
376#endif 482#endif
377 483
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
378#if EV_USE_INOTIFY 509#if EV_USE_INOTIFY
379# include <sys/utsname.h>
380# include <sys/statfs.h> 510# include <sys/statfs.h>
381# include <sys/inotify.h> 511# include <sys/inotify.h>
382/* 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 */
383# ifndef IN_DONT_FOLLOW 513# ifndef IN_DONT_FOLLOW
384# undef EV_USE_INOTIFY 514# undef EV_USE_INOTIFY
385# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
386# endif 516# endif
387#endif 517#endif
388 518
389#if EV_SELECT_IS_WINSOCKET
390# include <winsock.h>
391#endif
392
393#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
394/* 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 */
395# include <stdint.h> 521# include <stdint.h>
396# ifndef EFD_NONBLOCK 522# ifndef EFD_NONBLOCK
397# define EFD_NONBLOCK O_NONBLOCK 523# define EFD_NONBLOCK O_NONBLOCK
398# endif 524# endif
399# ifndef EFD_CLOEXEC 525# ifndef EFD_CLOEXEC
… …
401# define EFD_CLOEXEC O_CLOEXEC 527# define EFD_CLOEXEC O_CLOEXEC
402# else 528# else
403# define EFD_CLOEXEC 02000000 529# define EFD_CLOEXEC 02000000
404# endif 530# endif
405# endif 531# endif
406# ifdef __cplusplus
407extern "C" {
408# endif
409int (eventfd) (unsigned int initval, int flags); 532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
410# ifdef __cplusplus
411}
412# endif
413#endif 533#endif
414 534
415#if EV_USE_SIGNALFD 535#if EV_USE_SIGNALFD
416/* 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 */
417# include <stdint.h> 537# include <stdint.h>
418# ifndef SFD_NONBLOCK 538# ifndef SFD_NONBLOCK
419# define SFD_NONBLOCK O_NONBLOCK 539# define SFD_NONBLOCK O_NONBLOCK
420# endif 540# endif
421# ifndef SFD_CLOEXEC 541# ifndef SFD_CLOEXEC
… …
423# define SFD_CLOEXEC O_CLOEXEC 543# define SFD_CLOEXEC O_CLOEXEC
424# else 544# else
425# define SFD_CLOEXEC 02000000 545# define SFD_CLOEXEC 02000000
426# endif 546# endif
427# endif 547# endif
428# ifdef __cplusplus
429extern "C" {
430# endif
431int signalfd (int fd, const sigset_t *mask, int flags); 548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
432 549
433struct signalfd_siginfo 550struct signalfd_siginfo
434{ 551{
435 uint32_t ssi_signo; 552 uint32_t ssi_signo;
436 char pad[128 - sizeof (uint32_t)]; 553 char pad[128 - sizeof (uint32_t)];
437}; 554};
438# ifdef __cplusplus 555#endif
439} 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
440# endif 564# endif
441#endif 565#endif
442 566
443 567/*****************************************************************************/
444/**/
445 568
446#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
447# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 570# define EV_FREQUENT_CHECK ev_verify (EV_A)
448#else 571#else
449# define EV_FREQUENT_CHECK do { } while (0) 572# define EV_FREQUENT_CHECK do { } while (0)
450#endif 573#endif
451 574
452/* 575/*
453 * This is used to avoid floating point rounding problems. 576 * This is used to work around floating point rounding problems.
454 * It is added to ev_rt_now when scheduling periodics
455 * to ensure progress, time-wise, even when rounding
456 * errors are against us.
457 * This value is good at least till the year 4000. 577 * This value is good at least till the year 4000.
458 * Better solutions welcome.
459 */ 578 */
460#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 */
461 581
462#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) */
463#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) */
464 584
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;
465#if __GNUC__ >= 4 658 #if __GNUC__
466# define expect(expr,value) __builtin_expect ((expr),(value)) 659 typedef signed long long int64_t;
467# 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
468#else 674#else
469# define expect(expr,value) (expr) 675 #include <inttypes.h>
470# define noinline 676 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
471# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 677 #define ECB_PTRSIZE 8
472# define inline 678 #else
679 #define ECB_PTRSIZE 4
680 #endif
473# 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
474#endif 692 #endif
693#endif
475 694
476#define expect_false(expr) expect ((expr) != 0, 0) 695/* many compilers define _GNUC_ to some versions but then only implement
477#define expect_true(expr) expect ((expr) != 0, 1) 696 * what their idiot authors think are the "more important" extensions,
478#define inline_size static inline 697 * causing enormous grief in return for some better fake benchmark numbers.
479 698 * or so.
480#if EV_MINIMAL 699 * we try to detect these and simply assume they are not gcc - if they have
481# 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
482#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
483# define inline_speed static inline 1643# define inline_speed ecb_inline
1644#else
1645# define inline_speed ecb_noinline static
484#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/*****************************************************************************/
485 1713
486#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1714#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
487 1715
488#if EV_MINPRI == EV_MAXPRI 1716#if EV_MINPRI == EV_MAXPRI
489# define ABSPRI(w) (((W)w), 0) 1717# define ABSPRI(w) (((W)w), 0)
490#else 1718#else
491# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1719# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
492#endif 1720#endif
493 1721
494#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1722#define EMPTY /* required for microsofts broken pseudo-c compiler */
495#define EMPTY2(a,b) /* used to suppress some warnings */
496 1723
497typedef ev_watcher *W; 1724typedef ev_watcher *W;
498typedef ev_watcher_list *WL; 1725typedef ev_watcher_list *WL;
499typedef ev_watcher_time *WT; 1726typedef ev_watcher_time *WT;
500 1727
501#define ev_active(w) ((W)(w))->active 1728#define ev_active(w) ((W)(w))->active
502#define ev_at(w) ((WT)(w))->at 1729#define ev_at(w) ((WT)(w))->at
503 1730
504#if EV_USE_REALTIME 1731#if EV_USE_REALTIME
505/* 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 */
506/* giving it a reasonably high chance of working on typical architetcures */ 1733/* giving it a reasonably high chance of working on typical architectures */
507static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1734static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
508#endif 1735#endif
509 1736
510#if EV_USE_MONOTONIC 1737#if EV_USE_MONOTONIC
511static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1738static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
525# include "ev_win32.c" 1752# include "ev_win32.c"
526#endif 1753#endif
527 1754
528/*****************************************************************************/ 1755/*****************************************************************************/
529 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
530#if EV_AVOID_STDIO 1853#if EV_AVOID_STDIO
531static void noinline 1854ecb_noinline ecb_cold
1855static void
532ev_printerr (const char *msg) 1856ev_printerr (const char *msg)
533{ 1857{
534 write (STDERR_FILENO, msg, strlen (msg)); 1858 write (STDERR_FILENO, msg, strlen (msg));
535} 1859}
536#endif 1860#endif
537 1861
538static void (*syserr_cb)(const char *msg); 1862static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
539 1863
1864ecb_cold
540void 1865void
541ev_set_syserr_cb (void (*cb)(const char *msg)) 1866ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
542{ 1867{
543 syserr_cb = cb; 1868 syserr_cb = cb;
544} 1869}
545 1870
546static void noinline 1871ecb_noinline ecb_cold
1872static void
547ev_syserr (const char *msg) 1873ev_syserr (const char *msg)
548{ 1874{
549 if (!msg) 1875 if (!msg)
550 msg = "(libev) system error"; 1876 msg = "(libev) system error";
551 1877
552 if (syserr_cb) 1878 if (syserr_cb)
553 syserr_cb (msg); 1879 syserr_cb (msg);
554 else 1880 else
555 { 1881 {
556#if EV_AVOID_STDIO 1882#if EV_AVOID_STDIO
557 const char *err = strerror (errno);
558
559 ev_printerr (msg); 1883 ev_printerr (msg);
560 ev_printerr (": "); 1884 ev_printerr (": ");
561 ev_printerr (err); 1885 ev_printerr (strerror (errno));
562 ev_printerr ("\n"); 1886 ev_printerr ("\n");
563#else 1887#else
564 perror (msg); 1888 perror (msg);
565#endif 1889#endif
566 abort (); 1890 abort ();
567 } 1891 }
568} 1892}
569 1893
570static void * 1894static void *
571ev_realloc_emul (void *ptr, long size) 1895ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
572{ 1896{
573#if __GLIBC__
574 return realloc (ptr, size);
575#else
576 /* some systems, notably openbsd and darwin, fail to properly 1897 /* some systems, notably openbsd and darwin, fail to properly
577 * 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
578 * 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.
579 */ 1902 */
580 1903
581 if (size) 1904 if (size)
582 return realloc (ptr, size); 1905 return realloc (ptr, size);
583 1906
584 free (ptr); 1907 free (ptr);
585 return 0; 1908 return 0;
586#endif
587} 1909}
588 1910
589static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1911static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
590 1912
1913ecb_cold
591void 1914void
592ev_set_allocator (void *(*cb)(void *ptr, long size)) 1915ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
593{ 1916{
594 alloc = cb; 1917 alloc = cb;
595} 1918}
596 1919
597inline_speed void * 1920inline_speed void *
… …
600 ptr = alloc (ptr, size); 1923 ptr = alloc (ptr, size);
601 1924
602 if (!ptr && size) 1925 if (!ptr && size)
603 { 1926 {
604#if EV_AVOID_STDIO 1927#if EV_AVOID_STDIO
605 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1928 ev_printerr ("(libev) memory allocation failed, aborting.\n");
606#else 1929#else
607 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1930 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
608#endif 1931#endif
609 abort (); 1932 abort ();
610 } 1933 }
611 1934
612 return ptr; 1935 return ptr;
… …
624typedef struct 1947typedef struct
625{ 1948{
626 WL head; 1949 WL head;
627 unsigned char events; /* the events watched for */ 1950 unsigned char events; /* the events watched for */
628 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) */
629 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 */
630 unsigned char unused; 1953 unsigned char eflags; /* flags field for use by backends */
631#if EV_USE_EPOLL 1954#if EV_USE_EPOLL
632 unsigned int egen; /* generation counter to counter epoll bugs */ 1955 unsigned int egen; /* generation counter to counter epoll bugs */
633#endif 1956#endif
634#if EV_SELECT_IS_WINSOCKET 1957#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
635 SOCKET handle; 1958 SOCKET handle;
1959#endif
1960#if EV_USE_IOCP
1961 OVERLAPPED or, ow;
636#endif 1962#endif
637} ANFD; 1963} ANFD;
638 1964
639/* stores the pending event set for a given watcher */ 1965/* stores the pending event set for a given watcher */
640typedef struct 1966typedef struct
… …
682 #undef VAR 2008 #undef VAR
683 }; 2009 };
684 #include "ev_wrap.h" 2010 #include "ev_wrap.h"
685 2011
686 static struct ev_loop default_loop_struct; 2012 static struct ev_loop default_loop_struct;
687 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 */
688 2014
689#else 2015#else
690 2016
691 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 */
692 #define VAR(name,decl) static decl; 2018 #define VAR(name,decl) static decl;
693 #include "ev_vars.h" 2019 #include "ev_vars.h"
694 #undef VAR 2020 #undef VAR
695 2021
696 static int ev_default_loop_ptr; 2022 static int ev_default_loop_ptr;
697 2023
698#endif 2024#endif
699 2025
700#if EV_MINIMAL < 2 2026#if EV_FEATURE_API
701# 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)
702# 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)
703# define EV_INVOKE_PENDING invoke_cb (EV_A) 2029# define EV_INVOKE_PENDING invoke_cb (EV_A)
704#else 2030#else
705# define EV_RELEASE_CB (void)0 2031# define EV_RELEASE_CB (void)0
706# define EV_ACQUIRE_CB (void)0 2032# define EV_ACQUIRE_CB (void)0
707# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 2033# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
708#endif 2034#endif
709 2035
710#define EVUNLOOP_RECURSE 0x80 2036#define EVBREAK_RECURSE 0x80
711 2037
712/*****************************************************************************/ 2038/*****************************************************************************/
713 2039
714#ifndef EV_HAVE_EV_TIME 2040#ifndef EV_HAVE_EV_TIME
715ev_tstamp 2041ev_tstamp
716ev_time (void) 2042ev_time (void) EV_NOEXCEPT
717{ 2043{
718#if EV_USE_REALTIME 2044#if EV_USE_REALTIME
719 if (expect_true (have_realtime)) 2045 if (ecb_expect_true (have_realtime))
720 { 2046 {
721 struct timespec ts; 2047 struct timespec ts;
722 clock_gettime (CLOCK_REALTIME, &ts); 2048 clock_gettime (CLOCK_REALTIME, &ts);
723 return ts.tv_sec + ts.tv_nsec * 1e-9; 2049 return EV_TS_GET (ts);
724 } 2050 }
725#endif 2051#endif
726 2052
2053 {
727 struct timeval tv; 2054 struct timeval tv;
728 gettimeofday (&tv, 0); 2055 gettimeofday (&tv, 0);
729 return tv.tv_sec + tv.tv_usec * 1e-6; 2056 return EV_TV_GET (tv);
2057 }
730} 2058}
731#endif 2059#endif
732 2060
733inline_size ev_tstamp 2061inline_size ev_tstamp
734get_clock (void) 2062get_clock (void)
735{ 2063{
736#if EV_USE_MONOTONIC 2064#if EV_USE_MONOTONIC
737 if (expect_true (have_monotonic)) 2065 if (ecb_expect_true (have_monotonic))
738 { 2066 {
739 struct timespec ts; 2067 struct timespec ts;
740 clock_gettime (CLOCK_MONOTONIC, &ts); 2068 clock_gettime (CLOCK_MONOTONIC, &ts);
741 return ts.tv_sec + ts.tv_nsec * 1e-9; 2069 return EV_TS_GET (ts);
742 } 2070 }
743#endif 2071#endif
744 2072
745 return ev_time (); 2073 return ev_time ();
746} 2074}
747 2075
748#if EV_MULTIPLICITY 2076#if EV_MULTIPLICITY
749ev_tstamp 2077ev_tstamp
750ev_now (EV_P) 2078ev_now (EV_P) EV_NOEXCEPT
751{ 2079{
752 return ev_rt_now; 2080 return ev_rt_now;
753} 2081}
754#endif 2082#endif
755 2083
756void 2084void
757ev_sleep (ev_tstamp delay) 2085ev_sleep (ev_tstamp delay) EV_NOEXCEPT
758{ 2086{
759 if (delay > 0.) 2087 if (delay > EV_TS_CONST (0.))
760 { 2088 {
761#if EV_USE_NANOSLEEP 2089#if EV_USE_NANOSLEEP
762 struct timespec ts; 2090 struct timespec ts;
763 2091
764 ts.tv_sec = (time_t)delay; 2092 EV_TS_SET (ts, delay);
765 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
766
767 nanosleep (&ts, 0); 2093 nanosleep (&ts, 0);
768#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) */
769 Sleep ((unsigned long)(delay * 1e3)); 2097 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
770#else 2098#else
771 struct timeval tv; 2099 struct timeval tv;
772
773 tv.tv_sec = (time_t)delay;
774 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
775 2100
776 /* 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 */
777 /* something not guaranteed by newer posix versions, but guaranteed */ 2102 /* something not guaranteed by newer posix versions, but guaranteed */
778 /* by older ones */ 2103 /* by older ones */
2104 EV_TV_SET (tv, delay);
779 select (0, 0, 0, 0, &tv); 2105 select (0, 0, 0, 0, &tv);
780#endif 2106#endif
781 } 2107 }
782} 2108}
783 2109
784/*****************************************************************************/ 2110/*****************************************************************************/
785 2111
786#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 */
787 2113
788/* find a suitable new size for the given array, */ 2114/* find a suitable new size for the given array, */
789/* hopefully by rounding to a ncie-to-malloc size */ 2115/* hopefully by rounding to a nice-to-malloc size */
790inline_size int 2116inline_size int
791array_nextsize (int elem, int cur, int cnt) 2117array_nextsize (int elem, int cur, int cnt)
792{ 2118{
793 int ncur = cur + 1; 2119 int ncur = cur + 1;
794 2120
795 do 2121 do
796 ncur <<= 1; 2122 ncur <<= 1;
797 while (cnt > ncur); 2123 while (cnt > ncur);
798 2124
799 /* 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 */
800 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 2126 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
801 { 2127 {
802 ncur *= elem; 2128 ncur *= elem;
803 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);
804 ncur = ncur - sizeof (void *) * 4; 2130 ncur = ncur - sizeof (void *) * 4;
… …
806 } 2132 }
807 2133
808 return ncur; 2134 return ncur;
809} 2135}
810 2136
811static noinline void * 2137ecb_noinline ecb_cold
2138static void *
812array_realloc (int elem, void *base, int *cur, int cnt) 2139array_realloc (int elem, void *base, int *cur, int cnt)
813{ 2140{
814 *cur = array_nextsize (elem, *cur, cnt); 2141 *cur = array_nextsize (elem, *cur, cnt);
815 return ev_realloc (base, elem * *cur); 2142 return ev_realloc (base, elem * *cur);
816} 2143}
817 2144
2145#define array_needsize_noinit(base,offset,count)
2146
818#define array_init_zero(base,count) \ 2147#define array_needsize_zerofill(base,offset,count) \
819 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 2148 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
820 2149
821#define array_needsize(type,base,cur,cnt,init) \ 2150#define array_needsize(type,base,cur,cnt,init) \
822 if (expect_false ((cnt) > (cur))) \ 2151 if (ecb_expect_false ((cnt) > (cur))) \
823 { \ 2152 { \
824 int ocur_ = (cur); \ 2153 ecb_unused int ocur_ = (cur); \
825 (base) = (type *)array_realloc \ 2154 (base) = (type *)array_realloc \
826 (sizeof (type), (base), &(cur), (cnt)); \ 2155 (sizeof (type), (base), &(cur), (cnt)); \
827 init ((base) + (ocur_), (cur) - ocur_); \ 2156 init ((base), ocur_, ((cur) - ocur_)); \
828 } 2157 }
829 2158
830#if 0 2159#if 0
831#define array_slim(type,stem) \ 2160#define array_slim(type,stem) \
832 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2161 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
841 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
842 2171
843/*****************************************************************************/ 2172/*****************************************************************************/
844 2173
845/* dummy callback for pending events */ 2174/* dummy callback for pending events */
846static void noinline 2175ecb_noinline
2176static void
847pendingcb (EV_P_ ev_prepare *w, int revents) 2177pendingcb (EV_P_ ev_prepare *w, int revents)
848{ 2178{
849} 2179}
850 2180
851void noinline 2181ecb_noinline
2182void
852ev_feed_event (EV_P_ void *w, int revents) 2183ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
853{ 2184{
854 W w_ = (W)w; 2185 W w_ = (W)w;
855 int pri = ABSPRI (w_); 2186 int pri = ABSPRI (w_);
856 2187
857 if (expect_false (w_->pending)) 2188 if (ecb_expect_false (w_->pending))
858 pendings [pri][w_->pending - 1].events |= revents; 2189 pendings [pri][w_->pending - 1].events |= revents;
859 else 2190 else
860 { 2191 {
861 w_->pending = ++pendingcnt [pri]; 2192 w_->pending = ++pendingcnt [pri];
862 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2193 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
863 pendings [pri][w_->pending - 1].w = w_; 2194 pendings [pri][w_->pending - 1].w = w_;
864 pendings [pri][w_->pending - 1].events = revents; 2195 pendings [pri][w_->pending - 1].events = revents;
865 } 2196 }
2197
2198 pendingpri = NUMPRI - 1;
866} 2199}
867 2200
868inline_speed void 2201inline_speed void
869feed_reverse (EV_P_ W w) 2202feed_reverse (EV_P_ W w)
870{ 2203{
871 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2204 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
872 rfeeds [rfeedcnt++] = w; 2205 rfeeds [rfeedcnt++] = w;
873} 2206}
874 2207
875inline_size void 2208inline_size void
876feed_reverse_done (EV_P_ int revents) 2209feed_reverse_done (EV_P_ int revents)
… …
890} 2223}
891 2224
892/*****************************************************************************/ 2225/*****************************************************************************/
893 2226
894inline_speed void 2227inline_speed void
895fd_event_nc (EV_P_ int fd, int revents) 2228fd_event_nocheck (EV_P_ int fd, int revents)
896{ 2229{
897 ANFD *anfd = anfds + fd; 2230 ANFD *anfd = anfds + fd;
898 ev_io *w; 2231 ev_io *w;
899 2232
900 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)
… …
911inline_speed void 2244inline_speed void
912fd_event (EV_P_ int fd, int revents) 2245fd_event (EV_P_ int fd, int revents)
913{ 2246{
914 ANFD *anfd = anfds + fd; 2247 ANFD *anfd = anfds + fd;
915 2248
916 if (expect_true (!anfd->reify)) 2249 if (ecb_expect_true (!anfd->reify))
917 fd_event_nc (EV_A_ fd, revents); 2250 fd_event_nocheck (EV_A_ fd, revents);
918} 2251}
919 2252
920void 2253void
921ev_feed_fd_event (EV_P_ int fd, int revents) 2254ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
922{ 2255{
923 if (fd >= 0 && fd < anfdmax) 2256 if (fd >= 0 && fd < anfdmax)
924 fd_event_nc (EV_A_ fd, revents); 2257 fd_event_nocheck (EV_A_ fd, revents);
925} 2258}
926 2259
927/* make sure the external fd watch events are in-sync */ 2260/* make sure the external fd watch events are in-sync */
928/* with the kernel/libev internal state */ 2261/* with the kernel/libev internal state */
929inline_size void 2262inline_size void
930fd_reify (EV_P) 2263fd_reify (EV_P)
931{ 2264{
932 int i; 2265 int i;
933 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
934 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)
935 { 2305 {
936 int fd = fdchanges [i]; 2306 int fd = fdchanges [i];
937 ANFD *anfd = anfds + fd; 2307 ANFD *anfd = anfds + fd;
938 ev_io *w; 2308 ev_io *w;
939 2309
940 unsigned char events = 0; 2310 unsigned char o_events = anfd->events;
2311 unsigned char o_reify = anfd->reify;
941 2312
942 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2313 anfd->reify = 0;
943 events |= (unsigned char)w->events;
944 2314
945#if EV_SELECT_IS_WINSOCKET 2315 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
946 if (events)
947 { 2316 {
948 unsigned long arg; 2317 anfd->events = 0;
949 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2318
950 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 |= */
951 } 2324 }
952#endif
953 2325
954 { 2326 if (o_reify & EV__IOFDSET)
955 unsigned char o_events = anfd->events;
956 unsigned char o_reify = anfd->reify;
957
958 anfd->reify = 0;
959 anfd->events = events;
960
961 if (o_events != events || o_reify & EV__IOFDSET)
962 backend_modify (EV_A_ fd, o_events, events); 2327 backend_modify (EV_A_ fd, o_events, anfd->events);
963 } 2328 }
964 }
965 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
966 fdchangecnt = 0; 2337 fdchangecnt -= changecnt;
967} 2338}
968 2339
969/* something about the given fd changed */ 2340/* something about the given fd changed */
970inline_size void 2341inline_size
2342void
971fd_change (EV_P_ int fd, int flags) 2343fd_change (EV_P_ int fd, int flags)
972{ 2344{
973 unsigned char reify = anfds [fd].reify; 2345 unsigned char reify = anfds [fd].reify;
974 anfds [fd].reify |= flags; 2346 anfds [fd].reify |= flags;
975 2347
976 if (expect_true (!reify)) 2348 if (ecb_expect_true (!reify))
977 { 2349 {
978 ++fdchangecnt; 2350 ++fdchangecnt;
979 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2351 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
980 fdchanges [fdchangecnt - 1] = fd; 2352 fdchanges [fdchangecnt - 1] = fd;
981 } 2353 }
982} 2354}
983 2355
984/* 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 */
985inline_speed void 2357inline_speed ecb_cold void
986fd_kill (EV_P_ int fd) 2358fd_kill (EV_P_ int fd)
987{ 2359{
988 ev_io *w; 2360 ev_io *w;
989 2361
990 while ((w = (ev_io *)anfds [fd].head)) 2362 while ((w = (ev_io *)anfds [fd].head))
… …
992 ev_io_stop (EV_A_ w); 2364 ev_io_stop (EV_A_ w);
993 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);
994 } 2366 }
995} 2367}
996 2368
997/* check whether the given fd is atcually valid, for error recovery */ 2369/* check whether the given fd is actually valid, for error recovery */
998inline_size int 2370inline_size ecb_cold int
999fd_valid (int fd) 2371fd_valid (int fd)
1000{ 2372{
1001#ifdef _WIN32 2373#ifdef _WIN32
1002 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2374 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1003#else 2375#else
1004 return fcntl (fd, F_GETFD) != -1; 2376 return fcntl (fd, F_GETFD) != -1;
1005#endif 2377#endif
1006} 2378}
1007 2379
1008/* called on EBADF to verify fds */ 2380/* called on EBADF to verify fds */
1009static void noinline 2381ecb_noinline ecb_cold
2382static void
1010fd_ebadf (EV_P) 2383fd_ebadf (EV_P)
1011{ 2384{
1012 int fd; 2385 int fd;
1013 2386
1014 for (fd = 0; fd < anfdmax; ++fd) 2387 for (fd = 0; fd < anfdmax; ++fd)
… …
1016 if (!fd_valid (fd) && errno == EBADF) 2389 if (!fd_valid (fd) && errno == EBADF)
1017 fd_kill (EV_A_ fd); 2390 fd_kill (EV_A_ fd);
1018} 2391}
1019 2392
1020/* 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 */
1021static void noinline 2394ecb_noinline ecb_cold
2395static void
1022fd_enomem (EV_P) 2396fd_enomem (EV_P)
1023{ 2397{
1024 int fd; 2398 int fd;
1025 2399
1026 for (fd = anfdmax; fd--; ) 2400 for (fd = anfdmax; fd--; )
… …
1030 break; 2404 break;
1031 } 2405 }
1032} 2406}
1033 2407
1034/* 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 */
1035static void noinline 2409ecb_noinline
2410static void
1036fd_rearm_all (EV_P) 2411fd_rearm_all (EV_P)
1037{ 2412{
1038 int fd; 2413 int fd;
1039 2414
1040 for (fd = 0; fd < anfdmax; ++fd) 2415 for (fd = 0; fd < anfdmax; ++fd)
… …
1044 anfds [fd].emask = 0; 2419 anfds [fd].emask = 0;
1045 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 2420 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1046 } 2421 }
1047} 2422}
1048 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
1049/*****************************************************************************/ 2438/*****************************************************************************/
1050 2439
1051/* 2440/*
1052 * 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
1053 * 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
1054 * the branching factor of the d-tree. 2443 * the branching factor of the d-tree.
1055 */ 2444 */
1056 2445
1057/* 2446/*
… …
1079 ev_tstamp minat; 2468 ev_tstamp minat;
1080 ANHE *minpos; 2469 ANHE *minpos;
1081 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; 2470 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1082 2471
1083 /* find minimum child */ 2472 /* find minimum child */
1084 if (expect_true (pos + DHEAP - 1 < E)) 2473 if (ecb_expect_true (pos + DHEAP - 1 < E))
1085 { 2474 {
1086 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2475 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1087 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));
1088 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));
1089 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));
1090 } 2479 }
1091 else if (pos < E) 2480 else if (pos < E)
1092 { 2481 {
1093 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2482 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1094 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));
1095 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));
1096 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));
1097 } 2486 }
1098 else 2487 else
1099 break; 2488 break;
1100 2489
1101 if (ANHE_at (he) <= minat) 2490 if (ANHE_at (he) <= minat)
… …
1109 2498
1110 heap [k] = he; 2499 heap [k] = he;
1111 ev_active (ANHE_w (he)) = k; 2500 ev_active (ANHE_w (he)) = k;
1112} 2501}
1113 2502
1114#else /* 4HEAP */ 2503#else /* not 4HEAP */
1115 2504
1116#define HEAP0 1 2505#define HEAP0 1
1117#define HPARENT(k) ((k) >> 1) 2506#define HPARENT(k) ((k) >> 1)
1118#define UPHEAP_DONE(p,k) (!(p)) 2507#define UPHEAP_DONE(p,k) (!(p))
1119 2508
… …
1191 upheap (heap, i + HEAP0); 2580 upheap (heap, i + HEAP0);
1192} 2581}
1193 2582
1194/*****************************************************************************/ 2583/*****************************************************************************/
1195 2584
1196/* associate signal watchers to a signal signal */ 2585/* associate signal watchers to a signal */
1197typedef struct 2586typedef struct
1198{ 2587{
1199 EV_ATOMIC_T pending; 2588 EV_ATOMIC_T pending;
1200#if EV_MULTIPLICITY 2589#if EV_MULTIPLICITY
1201 EV_P; 2590 EV_P;
… …
1205 2594
1206static ANSIG signals [EV_NSIG - 1]; 2595static ANSIG signals [EV_NSIG - 1];
1207 2596
1208/*****************************************************************************/ 2597/*****************************************************************************/
1209 2598
1210/* used to prepare libev internal fd's */ 2599#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1211/* 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
1212inline_speed void 2647inline_speed void
1213fd_intern (int fd) 2648evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1214{ 2649{
1215#ifdef _WIN32 2650 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1216 unsigned long arg = 1;
1217 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1218#else
1219 fcntl (fd, F_SETFD, FD_CLOEXEC);
1220 fcntl (fd, F_SETFL, O_NONBLOCK);
1221#endif
1222}
1223 2651
1224static void noinline 2652 if (ecb_expect_true (*flag))
1225evpipe_init (EV_P) 2653 return;
1226{ 2654
1227 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)
1228 { 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
1229#if EV_USE_EVENTFD 2671#if EV_USE_EVENTFD
1230 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2672 if (evpipe [0] < 0)
1231 if (evfd < 0 && errno == EINVAL)
1232 evfd = eventfd (0, 0);
1233
1234 if (evfd >= 0)
1235 { 2673 {
1236 evpipe [0] = -1; 2674 uint64_t counter = 1;
1237 fd_intern (evfd); /* doing it twice doesn't hurt */ 2675 write (evpipe [1], &counter, sizeof (uint64_t));
1238 ev_io_set (&pipe_w, evfd, EV_READ);
1239 } 2676 }
1240 else 2677 else
1241#endif 2678#endif
1242 { 2679 {
1243 while (pipe (evpipe)) 2680#ifdef _WIN32
1244 ev_syserr ("(libev) error creating signal/async pipe"); 2681 WSABUF buf;
1245 2682 DWORD sent;
1246 fd_intern (evpipe [0]); 2683 buf.buf = (char *)&buf;
1247 fd_intern (evpipe [1]); 2684 buf.len = 1;
1248 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
1249 } 2689 }
1250
1251 ev_io_start (EV_A_ &pipe_w);
1252 ev_unref (EV_A); /* watcher should not keep loop alive */
1253 }
1254}
1255
1256inline_size void
1257evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1258{
1259 if (!*flag)
1260 {
1261 int old_errno = errno; /* save errno because write might clobber it */
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 write (evpipe [1], &old_errno, 1);
1274 2690
1275 errno = old_errno; 2691 errno = old_errno;
1276 } 2692 }
1277} 2693}
1278 2694
… …
1281static void 2697static void
1282pipecb (EV_P_ ev_io *iow, int revents) 2698pipecb (EV_P_ ev_io *iow, int revents)
1283{ 2699{
1284 int i; 2700 int i;
1285 2701
2702 if (revents & EV_READ)
2703 {
1286#if EV_USE_EVENTFD 2704#if EV_USE_EVENTFD
1287 if (evfd >= 0) 2705 if (evpipe [0] < 0)
1288 { 2706 {
1289 uint64_t counter; 2707 uint64_t counter;
1290 read (evfd, &counter, sizeof (uint64_t)); 2708 read (evpipe [1], &counter, sizeof (uint64_t));
1291 } 2709 }
1292 else 2710 else
1293#endif 2711#endif
1294 { 2712 {
1295 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
1296 read (evpipe [0], &dummy, 1); 2722 read (evpipe [0], &dummy, sizeof (dummy));
2723#endif
2724 }
1297 } 2725 }
1298 2726
2727 pipe_write_skipped = 0;
2728
2729 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2730
2731#if EV_SIGNAL_ENABLE
1299 if (sig_pending) 2732 if (sig_pending)
1300 { 2733 {
1301 sig_pending = 0; 2734 sig_pending = 0;
1302 2735
2736 ECB_MEMORY_FENCE;
2737
1303 for (i = EV_NSIG - 1; i--; ) 2738 for (i = EV_NSIG - 1; i--; )
1304 if (expect_false (signals [i].pending)) 2739 if (ecb_expect_false (signals [i].pending))
1305 ev_feed_signal_event (EV_A_ i + 1); 2740 ev_feed_signal_event (EV_A_ i + 1);
1306 } 2741 }
2742#endif
1307 2743
1308#if EV_ASYNC_ENABLE 2744#if EV_ASYNC_ENABLE
1309 if (async_pending) 2745 if (async_pending)
1310 { 2746 {
1311 async_pending = 0; 2747 async_pending = 0;
2748
2749 ECB_MEMORY_FENCE;
1312 2750
1313 for (i = asynccnt; i--; ) 2751 for (i = asynccnt; i--; )
1314 if (asyncs [i]->sent) 2752 if (asyncs [i]->sent)
1315 { 2753 {
1316 asyncs [i]->sent = 0; 2754 asyncs [i]->sent = 0;
2755 ECB_MEMORY_FENCE_RELEASE;
1317 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2756 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1318 } 2757 }
1319 } 2758 }
1320#endif 2759#endif
1321} 2760}
1322 2761
1323/*****************************************************************************/ 2762/*****************************************************************************/
1324 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
1325static void 2780static void
1326ev_sighandler (int signum) 2781ev_sighandler (int signum)
1327{ 2782{
1328#if EV_MULTIPLICITY
1329 EV_P = signals [signum - 1].loop;
1330#endif
1331
1332#ifdef _WIN32 2783#ifdef _WIN32
1333 signal (signum, ev_sighandler); 2784 signal (signum, ev_sighandler);
1334#endif 2785#endif
1335 2786
1336 signals [signum - 1].pending = 1; 2787 ev_feed_signal (signum);
1337 evpipe_write (EV_A_ &sig_pending);
1338} 2788}
1339 2789
1340void noinline 2790ecb_noinline
2791void
1341ev_feed_signal_event (EV_P_ int signum) 2792ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1342{ 2793{
1343 WL w; 2794 WL w;
1344 2795
1345 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2796 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
1346 return; 2797 return;
1347 2798
1348 --signum; 2799 --signum;
1349 2800
1350#if EV_MULTIPLICITY 2801#if EV_MULTIPLICITY
1351 /* 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 */
1352 /* or, likely more useful, feeding a signal nobody is waiting for */ 2803 /* or, likely more useful, feeding a signal nobody is waiting for */
1353 2804
1354 if (expect_false (signals [signum].loop != EV_A)) 2805 if (ecb_expect_false (signals [signum].loop != EV_A))
1355 return; 2806 return;
1356#endif 2807#endif
1357 2808
1358 signals [signum].pending = 0; 2809 signals [signum].pending = 0;
2810 ECB_MEMORY_FENCE_RELEASE;
1359 2811
1360 for (w = signals [signum].head; w; w = w->next) 2812 for (w = signals [signum].head; w; w = w->next)
1361 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2813 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1362} 2814}
1363 2815
… …
1379 break; 2831 break;
1380 } 2832 }
1381} 2833}
1382#endif 2834#endif
1383 2835
2836#endif
2837
1384/*****************************************************************************/ 2838/*****************************************************************************/
1385 2839
2840#if EV_CHILD_ENABLE
1386static WL childs [EV_PID_HASHSIZE]; 2841static WL childs [EV_PID_HASHSIZE];
1387
1388#ifndef _WIN32
1389 2842
1390static ev_signal childev; 2843static ev_signal childev;
1391 2844
1392#ifndef WIFCONTINUED 2845#ifndef WIFCONTINUED
1393# define WIFCONTINUED(status) 0 2846# define WIFCONTINUED(status) 0
… …
1398child_reap (EV_P_ int chain, int pid, int status) 2851child_reap (EV_P_ int chain, int pid, int status)
1399{ 2852{
1400 ev_child *w; 2853 ev_child *w;
1401 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2854 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1402 2855
1403 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)
1404 { 2857 {
1405 if ((w->pid == pid || !w->pid) 2858 if ((w->pid == pid || !w->pid)
1406 && (!traced || (w->flags & 1))) 2859 && (!traced || (w->flags & 1)))
1407 { 2860 {
1408 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 */
… …
1433 /* 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 */
1434 /* 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 */
1435 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2888 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1436 2889
1437 child_reap (EV_A_ pid, pid, status); 2890 child_reap (EV_A_ pid, pid, status);
1438 if (EV_PID_HASHSIZE > 1) 2891 if ((EV_PID_HASHSIZE) > 1)
1439 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 */
1440} 2893}
1441 2894
1442#endif 2895#endif
1443 2896
1444/*****************************************************************************/ 2897/*****************************************************************************/
1445 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
1446#if EV_USE_PORT 2954#if EV_USE_PORT
1447# include "ev_port.c" 2955# include "ev_port.c"
1448#endif 2956#endif
1449#if EV_USE_KQUEUE 2957#if EV_USE_KQUEUE
1450# include "ev_kqueue.c" 2958# include "ev_kqueue.c"
1451#endif 2959#endif
1452#if EV_USE_EPOLL 2960#if EV_USE_EPOLL
1453# include "ev_epoll.c" 2961# include "ev_epoll.c"
1454#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
1455#if EV_USE_POLL 2969#if EV_USE_POLL
1456# include "ev_poll.c" 2970# include "ev_poll.c"
1457#endif 2971#endif
1458#if EV_USE_SELECT 2972#if EV_USE_SELECT
1459# include "ev_select.c" 2973# include "ev_select.c"
1460#endif 2974#endif
1461 2975
1462int 2976ecb_cold int
1463ev_version_major (void) 2977ev_version_major (void) EV_NOEXCEPT
1464{ 2978{
1465 return EV_VERSION_MAJOR; 2979 return EV_VERSION_MAJOR;
1466} 2980}
1467 2981
1468int 2982ecb_cold int
1469ev_version_minor (void) 2983ev_version_minor (void) EV_NOEXCEPT
1470{ 2984{
1471 return EV_VERSION_MINOR; 2985 return EV_VERSION_MINOR;
1472} 2986}
1473 2987
1474/* 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 */
1475int inline_size 2989inline_size ecb_cold int
1476enable_secure (void) 2990enable_secure (void)
1477{ 2991{
1478#ifdef _WIN32 2992#ifdef _WIN32
1479 return 0; 2993 return 0;
1480#else 2994#else
1481 return getuid () != geteuid () 2995 return getuid () != geteuid ()
1482 || getgid () != getegid (); 2996 || getgid () != getegid ();
1483#endif 2997#endif
1484} 2998}
1485 2999
3000ecb_cold
1486unsigned int 3001unsigned int
1487ev_supported_backends (void) 3002ev_supported_backends (void) EV_NOEXCEPT
1488{ 3003{
1489 unsigned int flags = 0; 3004 unsigned int flags = 0;
1490 3005
1491 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3006 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1492 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 3007 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1493 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3008 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1494 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3009 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
1495 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 3010 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
1496 3011 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
3012 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
3013
1497 return flags; 3014 return flags;
1498} 3015}
1499 3016
3017ecb_cold
1500unsigned int 3018unsigned int
1501ev_recommended_backends (void) 3019ev_recommended_backends (void) EV_NOEXCEPT
1502{ 3020{
1503 unsigned int flags = ev_supported_backends (); 3021 unsigned int flags = ev_supported_backends ();
1504 3022
1505#ifndef __NetBSD__ 3023#ifndef __NetBSD__
1506 /* kqueue is borked on everything but netbsd apparently */ 3024 /* kqueue is borked on everything but netbsd apparently */
… …
1510#ifdef __APPLE__ 3028#ifdef __APPLE__
1511 /* only select works correctly on that "unix-certified" platform */ 3029 /* only select works correctly on that "unix-certified" platform */
1512 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 3030 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1513 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 */
1514#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
1515 3045
1516 return flags; 3046 return flags;
1517} 3047}
1518 3048
3049ecb_cold
1519unsigned int 3050unsigned int
1520ev_embeddable_backends (void) 3051ev_embeddable_backends (void) EV_NOEXCEPT
1521{ 3052{
1522 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3053 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
1523 3054
1524 /* 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 */
1525 /* please fix it and tell me how to detect the fix */ 3056 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1526 flags &= ~EVBACKEND_EPOLL; 3057 flags &= ~EVBACKEND_EPOLL;
3058
3059 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
1527 3060
1528 return flags; 3061 return flags;
1529} 3062}
1530 3063
1531unsigned int 3064unsigned int
1532ev_backend (EV_P) 3065ev_backend (EV_P) EV_NOEXCEPT
1533{ 3066{
1534 return backend; 3067 return backend;
1535} 3068}
1536 3069
1537#if EV_MINIMAL < 2 3070#if EV_FEATURE_API
1538unsigned int 3071unsigned int
1539ev_loop_count (EV_P) 3072ev_iteration (EV_P) EV_NOEXCEPT
1540{ 3073{
1541 return loop_count; 3074 return loop_count;
1542} 3075}
1543 3076
1544unsigned int 3077unsigned int
1545ev_loop_depth (EV_P) 3078ev_depth (EV_P) EV_NOEXCEPT
1546{ 3079{
1547 return loop_depth; 3080 return loop_depth;
1548} 3081}
1549 3082
1550void 3083void
1551ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 3084ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1552{ 3085{
1553 io_blocktime = interval; 3086 io_blocktime = interval;
1554} 3087}
1555 3088
1556void 3089void
1557ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 3090ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1558{ 3091{
1559 timeout_blocktime = interval; 3092 timeout_blocktime = interval;
1560} 3093}
1561 3094
1562void 3095void
1563ev_set_userdata (EV_P_ void *data) 3096ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1564{ 3097{
1565 userdata = data; 3098 userdata = data;
1566} 3099}
1567 3100
1568void * 3101void *
1569ev_userdata (EV_P) 3102ev_userdata (EV_P) EV_NOEXCEPT
1570{ 3103{
1571 return userdata; 3104 return userdata;
1572} 3105}
1573 3106
3107void
1574void 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
1575{ 3109{
1576 invoke_cb = invoke_pending_cb; 3110 invoke_cb = invoke_pending_cb;
1577} 3111}
1578 3112
3113void
1579void 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
1580{ 3115{
1581 release_cb = release; 3116 release_cb = release;
1582 acquire_cb = acquire; 3117 acquire_cb = acquire;
1583} 3118}
1584#endif 3119#endif
1585 3120
1586/* initialise a loop structure, must be zero-initialised */ 3121/* initialise a loop structure, must be zero-initialised */
1587static void noinline 3122ecb_noinline ecb_cold
3123static void
1588loop_init (EV_P_ unsigned int flags) 3124loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1589{ 3125{
1590 if (!backend) 3126 if (!backend)
1591 { 3127 {
3128 origflags = flags;
3129
1592#if EV_USE_REALTIME 3130#if EV_USE_REALTIME
1593 if (!have_realtime) 3131 if (!have_realtime)
1594 { 3132 {
1595 struct timespec ts; 3133 struct timespec ts;
1596 3134
… …
1618 if (!(flags & EVFLAG_NOENV) 3156 if (!(flags & EVFLAG_NOENV)
1619 && !enable_secure () 3157 && !enable_secure ()
1620 && getenv ("LIBEV_FLAGS")) 3158 && getenv ("LIBEV_FLAGS"))
1621 flags = atoi (getenv ("LIBEV_FLAGS")); 3159 flags = atoi (getenv ("LIBEV_FLAGS"));
1622 3160
1623 ev_rt_now = ev_time (); 3161 ev_rt_now = ev_time ();
1624 mn_now = get_clock (); 3162 mn_now = get_clock ();
1625 now_floor = mn_now; 3163 now_floor = mn_now;
1626 rtmn_diff = ev_rt_now - mn_now; 3164 rtmn_diff = ev_rt_now - mn_now;
1627#if EV_MINIMAL < 2 3165#if EV_FEATURE_API
1628 invoke_cb = ev_invoke_pending; 3166 invoke_cb = ev_invoke_pending;
1629#endif 3167#endif
1630 3168
1631 io_blocktime = 0.; 3169 io_blocktime = 0.;
1632 timeout_blocktime = 0.; 3170 timeout_blocktime = 0.;
1633 backend = 0; 3171 backend = 0;
1634 backend_fd = -1; 3172 backend_fd = -1;
1635 sig_pending = 0; 3173 sig_pending = 0;
1636#if EV_ASYNC_ENABLE 3174#if EV_ASYNC_ENABLE
1637 async_pending = 0; 3175 async_pending = 0;
1638#endif 3176#endif
3177 pipe_write_skipped = 0;
3178 pipe_write_wanted = 0;
3179 evpipe [0] = -1;
3180 evpipe [1] = -1;
1639#if EV_USE_INOTIFY 3181#if EV_USE_INOTIFY
1640 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3182 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1641#endif 3183#endif
1642#if EV_USE_SIGNALFD 3184#if EV_USE_SIGNALFD
1643 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3185 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1644#endif 3186#endif
3187#if EV_USE_TIMERFD
3188 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3189#endif
1645 3190
1646 if (!(flags & 0x0000ffffU)) 3191 if (!(flags & EVBACKEND_MASK))
1647 flags |= ev_recommended_backends (); 3192 flags |= ev_recommended_backends ();
1648 3193
3194#if EV_USE_IOCP
3195 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3196#endif
1649#if EV_USE_PORT 3197#if EV_USE_PORT
1650 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3198 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1651#endif 3199#endif
1652#if EV_USE_KQUEUE 3200#if EV_USE_KQUEUE
1653 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);
1654#endif 3208#endif
1655#if EV_USE_EPOLL 3209#if EV_USE_EPOLL
1656 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3210 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1657#endif 3211#endif
1658#if EV_USE_POLL 3212#if EV_USE_POLL
1659 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3213 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1660#endif 3214#endif
1661#if EV_USE_SELECT 3215#if EV_USE_SELECT
1662 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3216 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1663#endif 3217#endif
1664 3218
1665 ev_prepare_init (&pending_w, pendingcb); 3219 ev_prepare_init (&pending_w, pendingcb);
1666 3220
3221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1667 ev_init (&pipe_w, pipecb); 3222 ev_init (&pipe_w, pipecb);
1668 ev_set_priority (&pipe_w, EV_MAXPRI); 3223 ev_set_priority (&pipe_w, EV_MAXPRI);
3224#endif
1669 } 3225 }
1670} 3226}
1671 3227
1672/* free up a loop structure */ 3228/* free up a loop structure */
1673static void noinline 3229ecb_cold
3230void
1674loop_destroy (EV_P) 3231ev_loop_destroy (EV_P)
1675{ 3232{
1676 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
1677 3257
1678 if (ev_is_active (&pipe_w)) 3258 if (ev_is_active (&pipe_w))
1679 { 3259 {
1680 /*ev_ref (EV_A);*/ 3260 /*ev_ref (EV_A);*/
1681 /*ev_io_stop (EV_A_ &pipe_w);*/ 3261 /*ev_io_stop (EV_A_ &pipe_w);*/
1682 3262
1683#if EV_USE_EVENTFD
1684 if (evfd >= 0)
1685 close (evfd);
1686#endif
1687
1688 if (evpipe [0] >= 0)
1689 {
1690 EV_WIN32_CLOSE_FD (evpipe [0]); 3263 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1691 EV_WIN32_CLOSE_FD (evpipe [1]); 3264 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1692 }
1693 } 3265 }
1694 3266
1695#if EV_USE_SIGNALFD 3267#if EV_USE_SIGNALFD
1696 if (ev_is_active (&sigfd_w)) 3268 if (ev_is_active (&sigfd_w))
1697 close (sigfd); 3269 close (sigfd);
1698#endif 3270#endif
1699 3271
3272#if EV_USE_TIMERFD
3273 if (ev_is_active (&timerfd_w))
3274 close (timerfd);
3275#endif
3276
1700#if EV_USE_INOTIFY 3277#if EV_USE_INOTIFY
1701 if (fs_fd >= 0) 3278 if (fs_fd >= 0)
1702 close (fs_fd); 3279 close (fs_fd);
1703#endif 3280#endif
1704 3281
1705 if (backend_fd >= 0) 3282 if (backend_fd >= 0)
1706 close (backend_fd); 3283 close (backend_fd);
1707 3284
3285#if EV_USE_IOCP
3286 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3287#endif
1708#if EV_USE_PORT 3288#if EV_USE_PORT
1709 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3289 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1710#endif 3290#endif
1711#if EV_USE_KQUEUE 3291#if EV_USE_KQUEUE
1712 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);
1713#endif 3299#endif
1714#if EV_USE_EPOLL 3300#if EV_USE_EPOLL
1715 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3301 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1716#endif 3302#endif
1717#if EV_USE_POLL 3303#if EV_USE_POLL
1718 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3304 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1719#endif 3305#endif
1720#if EV_USE_SELECT 3306#if EV_USE_SELECT
1721 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3307 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1722#endif 3308#endif
1723 3309
1724 for (i = NUMPRI; i--; ) 3310 for (i = NUMPRI; i--; )
1725 { 3311 {
1726 array_free (pending, [i]); 3312 array_free (pending, [i]);
… …
1739 array_free (periodic, EMPTY); 3325 array_free (periodic, EMPTY);
1740#endif 3326#endif
1741#if EV_FORK_ENABLE 3327#if EV_FORK_ENABLE
1742 array_free (fork, EMPTY); 3328 array_free (fork, EMPTY);
1743#endif 3329#endif
3330#if EV_CLEANUP_ENABLE
3331 array_free (cleanup, EMPTY);
3332#endif
1744 array_free (prepare, EMPTY); 3333 array_free (prepare, EMPTY);
1745 array_free (check, EMPTY); 3334 array_free (check, EMPTY);
1746#if EV_ASYNC_ENABLE 3335#if EV_ASYNC_ENABLE
1747 array_free (async, EMPTY); 3336 array_free (async, EMPTY);
1748#endif 3337#endif
1749 3338
1750 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
1751} 3349}
1752 3350
1753#if EV_USE_INOTIFY 3351#if EV_USE_INOTIFY
1754inline_size void infy_fork (EV_P); 3352inline_size void infy_fork (EV_P);
1755#endif 3353#endif
1756 3354
1757inline_size void 3355inline_size void
1758loop_fork (EV_P) 3356loop_fork (EV_P)
1759{ 3357{
1760#if EV_USE_PORT 3358#if EV_USE_PORT
1761 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3359 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1762#endif 3360#endif
1763#if EV_USE_KQUEUE 3361#if EV_USE_KQUEUE
1764 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);
1765#endif 3369#endif
1766#if EV_USE_EPOLL 3370#if EV_USE_EPOLL
1767 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3371 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1768#endif 3372#endif
1769#if EV_USE_INOTIFY 3373#if EV_USE_INOTIFY
1770 infy_fork (EV_A); 3374 infy_fork (EV_A);
1771#endif 3375#endif
1772 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
1773 if (ev_is_active (&pipe_w)) 3399 if (ev_is_active (&pipe_w))
1774 { 3400 {
1775 /* this "locks" the handlers against writing to the pipe */ 3401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1776 /* while we modify the fd vars */ 3402
1777 sig_pending = 1;
1778#if EV_ASYNC_ENABLE
1779 async_pending = 1;
1780#endif
1781
1782 ev_ref (EV_A); 3403 ev_ref (EV_A);
1783 ev_io_stop (EV_A_ &pipe_w); 3404 ev_io_stop (EV_A_ &pipe_w);
1784 3405
1785#if EV_USE_EVENTFD
1786 if (evfd >= 0)
1787 close (evfd);
1788#endif
1789
1790 if (evpipe [0] >= 0) 3406 if (evpipe [0] >= 0)
1791 {
1792 EV_WIN32_CLOSE_FD (evpipe [0]); 3407 EV_WIN32_CLOSE_FD (evpipe [0]);
1793 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);
1794 } 3412 }
1795 3413 #endif
1796 evpipe_init (EV_A);
1797 /* now iterate over everything, in case we missed something */
1798 pipecb (EV_A_ &pipe_w, EV_READ);
1799 } 3414 }
1800 3415
1801 postfork = 0; 3416 postfork = 0;
1802} 3417}
1803 3418
1804#if EV_MULTIPLICITY 3419#if EV_MULTIPLICITY
1805 3420
3421ecb_cold
1806struct ev_loop * 3422struct ev_loop *
1807ev_loop_new (unsigned int flags) 3423ev_loop_new (unsigned int flags) EV_NOEXCEPT
1808{ 3424{
1809 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3425 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1810 3426
1811 memset (EV_A, 0, sizeof (struct ev_loop)); 3427 memset (EV_A, 0, sizeof (struct ev_loop));
1812 loop_init (EV_A_ flags); 3428 loop_init (EV_A_ flags);
1813 3429
1814 if (ev_backend (EV_A)) 3430 if (ev_backend (EV_A))
1815 return EV_A; 3431 return EV_A;
1816 3432
3433 ev_free (EV_A);
1817 return 0; 3434 return 0;
1818} 3435}
1819 3436
1820void
1821ev_loop_destroy (EV_P)
1822{
1823 loop_destroy (EV_A);
1824 ev_free (loop);
1825}
1826
1827void
1828ev_loop_fork (EV_P)
1829{
1830 postfork = 1; /* must be in line with ev_default_fork */
1831}
1832#endif /* multiplicity */ 3437#endif /* multiplicity */
1833 3438
1834#if EV_VERIFY 3439#if EV_VERIFY
1835static void noinline 3440ecb_noinline ecb_cold
3441static void
1836verify_watcher (EV_P_ W w) 3442verify_watcher (EV_P_ W w)
1837{ 3443{
1838 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));
1839 3445
1840 if (w->pending) 3446 if (w->pending)
1841 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));
1842} 3448}
1843 3449
1844static void noinline 3450ecb_noinline ecb_cold
3451static void
1845verify_heap (EV_P_ ANHE *heap, int N) 3452verify_heap (EV_P_ ANHE *heap, int N)
1846{ 3453{
1847 int i; 3454 int i;
1848 3455
1849 for (i = HEAP0; i < N + HEAP0; ++i) 3456 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1854 3461
1855 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3462 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1856 } 3463 }
1857} 3464}
1858 3465
1859static void noinline 3466ecb_noinline ecb_cold
3467static void
1860array_verify (EV_P_ W *ws, int cnt) 3468array_verify (EV_P_ W *ws, int cnt)
1861{ 3469{
1862 while (cnt--) 3470 while (cnt--)
1863 { 3471 {
1864 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3472 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1865 verify_watcher (EV_A_ ws [cnt]); 3473 verify_watcher (EV_A_ ws [cnt]);
1866 } 3474 }
1867} 3475}
1868#endif 3476#endif
1869 3477
1870#if EV_MINIMAL < 2 3478#if EV_FEATURE_API
1871void 3479void ecb_cold
1872ev_loop_verify (EV_P) 3480ev_verify (EV_P) EV_NOEXCEPT
1873{ 3481{
1874#if EV_VERIFY 3482#if EV_VERIFY
1875 int i; 3483 int i;
1876 WL w; 3484 WL w, w2;
1877 3485
1878 assert (activecnt >= -1); 3486 assert (activecnt >= -1);
1879 3487
1880 assert (fdchangemax >= fdchangecnt); 3488 assert (fdchangemax >= fdchangecnt);
1881 for (i = 0; i < fdchangecnt; ++i) 3489 for (i = 0; i < fdchangecnt; ++i)
1882 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3490 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1883 3491
1884 assert (anfdmax >= 0); 3492 assert (anfdmax >= 0);
1885 for (i = 0; i < anfdmax; ++i) 3493 for (i = 0; i < anfdmax; ++i)
3494 {
3495 int j = 0;
3496
1886 for (w = anfds [i].head; w; w = w->next) 3497 for (w = w2 = anfds [i].head; w; w = w->next)
1887 { 3498 {
1888 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
1889 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));
1890 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));
1891 } 3509 }
3510 }
1892 3511
1893 assert (timermax >= timercnt); 3512 assert (timermax >= timercnt);
1894 verify_heap (EV_A_ timers, timercnt); 3513 verify_heap (EV_A_ timers, timercnt);
1895 3514
1896#if EV_PERIODIC_ENABLE 3515#if EV_PERIODIC_ENABLE
… …
1911#if EV_FORK_ENABLE 3530#if EV_FORK_ENABLE
1912 assert (forkmax >= forkcnt); 3531 assert (forkmax >= forkcnt);
1913 array_verify (EV_A_ (W *)forks, forkcnt); 3532 array_verify (EV_A_ (W *)forks, forkcnt);
1914#endif 3533#endif
1915 3534
3535#if EV_CLEANUP_ENABLE
3536 assert (cleanupmax >= cleanupcnt);
3537 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3538#endif
3539
1916#if EV_ASYNC_ENABLE 3540#if EV_ASYNC_ENABLE
1917 assert (asyncmax >= asynccnt); 3541 assert (asyncmax >= asynccnt);
1918 array_verify (EV_A_ (W *)asyncs, asynccnt); 3542 array_verify (EV_A_ (W *)asyncs, asynccnt);
1919#endif 3543#endif
1920 3544
3545#if EV_PREPARE_ENABLE
1921 assert (preparemax >= preparecnt); 3546 assert (preparemax >= preparecnt);
1922 array_verify (EV_A_ (W *)prepares, preparecnt); 3547 array_verify (EV_A_ (W *)prepares, preparecnt);
3548#endif
1923 3549
3550#if EV_CHECK_ENABLE
1924 assert (checkmax >= checkcnt); 3551 assert (checkmax >= checkcnt);
1925 array_verify (EV_A_ (W *)checks, checkcnt); 3552 array_verify (EV_A_ (W *)checks, checkcnt);
3553#endif
1926 3554
1927# if 0 3555# if 0
3556#if EV_CHILD_ENABLE
1928 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)
1929 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) 3558 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3559#endif
1930# endif 3560# endif
1931#endif 3561#endif
1932} 3562}
1933#endif 3563#endif
1934 3564
1935#if EV_MULTIPLICITY 3565#if EV_MULTIPLICITY
3566ecb_cold
1936struct ev_loop * 3567struct ev_loop *
1937ev_default_loop_init (unsigned int flags)
1938#else 3568#else
1939int 3569int
3570#endif
1940ev_default_loop (unsigned int flags) 3571ev_default_loop (unsigned int flags) EV_NOEXCEPT
1941#endif
1942{ 3572{
1943 if (!ev_default_loop_ptr) 3573 if (!ev_default_loop_ptr)
1944 { 3574 {
1945#if EV_MULTIPLICITY 3575#if EV_MULTIPLICITY
1946 EV_P = ev_default_loop_ptr = &default_loop_struct; 3576 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1950 3580
1951 loop_init (EV_A_ flags); 3581 loop_init (EV_A_ flags);
1952 3582
1953 if (ev_backend (EV_A)) 3583 if (ev_backend (EV_A))
1954 { 3584 {
1955#ifndef _WIN32 3585#if EV_CHILD_ENABLE
1956 ev_signal_init (&childev, childcb, SIGCHLD); 3586 ev_signal_init (&childev, childcb, SIGCHLD);
1957 ev_set_priority (&childev, EV_MAXPRI); 3587 ev_set_priority (&childev, EV_MAXPRI);
1958 ev_signal_start (EV_A_ &childev); 3588 ev_signal_start (EV_A_ &childev);
1959 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3589 ev_unref (EV_A); /* child watcher should not keep loop alive */
1960#endif 3590#endif
… …
1965 3595
1966 return ev_default_loop_ptr; 3596 return ev_default_loop_ptr;
1967} 3597}
1968 3598
1969void 3599void
1970ev_default_destroy (void) 3600ev_loop_fork (EV_P) EV_NOEXCEPT
1971{ 3601{
1972#if EV_MULTIPLICITY 3602 postfork = 1;
1973 EV_P = ev_default_loop_ptr;
1974#endif
1975
1976 ev_default_loop_ptr = 0;
1977
1978#ifndef _WIN32
1979 ev_ref (EV_A); /* child watcher */
1980 ev_signal_stop (EV_A_ &childev);
1981#endif
1982
1983 loop_destroy (EV_A);
1984}
1985
1986void
1987ev_default_fork (void)
1988{
1989#if EV_MULTIPLICITY
1990 EV_P = ev_default_loop_ptr;
1991#endif
1992
1993 postfork = 1; /* must be in line with ev_loop_fork */
1994} 3603}
1995 3604
1996/*****************************************************************************/ 3605/*****************************************************************************/
1997 3606
1998void 3607void
… …
2000{ 3609{
2001 EV_CB_INVOKE ((W)w, revents); 3610 EV_CB_INVOKE ((W)w, revents);
2002} 3611}
2003 3612
2004unsigned int 3613unsigned int
2005ev_pending_count (EV_P) 3614ev_pending_count (EV_P) EV_NOEXCEPT
2006{ 3615{
2007 int pri; 3616 int pri;
2008 unsigned int count = 0; 3617 unsigned int count = 0;
2009 3618
2010 for (pri = NUMPRI; pri--; ) 3619 for (pri = NUMPRI; pri--; )
2011 count += pendingcnt [pri]; 3620 count += pendingcnt [pri];
2012 3621
2013 return count; 3622 return count;
2014} 3623}
2015 3624
2016void noinline 3625ecb_noinline
3626void
2017ev_invoke_pending (EV_P) 3627ev_invoke_pending (EV_P)
2018{ 3628{
2019 int pri; 3629 pendingpri = NUMPRI;
2020 3630
2021 for (pri = NUMPRI; pri--; ) 3631 do
3632 {
3633 --pendingpri;
3634
3635 /* pendingpri possibly gets modified in the inner loop */
2022 while (pendingcnt [pri]) 3636 while (pendingcnt [pendingpri])
2023 { 3637 {
2024 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3638 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2025 3639
2026 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2027 /* ^ this is no longer true, as pending_w could be here */
2028
2029 p->w->pending = 0; 3640 p->w->pending = 0;
2030 EV_CB_INVOKE (p->w, p->events); 3641 EV_CB_INVOKE (p->w, p->events);
2031 EV_FREQUENT_CHECK; 3642 EV_FREQUENT_CHECK;
2032 } 3643 }
3644 }
3645 while (pendingpri);
2033} 3646}
2034 3647
2035#if EV_IDLE_ENABLE 3648#if EV_IDLE_ENABLE
2036/* make idle watchers pending. this handles the "call-idle */ 3649/* make idle watchers pending. this handles the "call-idle */
2037/* only when higher priorities are idle" logic */ 3650/* only when higher priorities are idle" logic */
2038inline_size void 3651inline_size void
2039idle_reify (EV_P) 3652idle_reify (EV_P)
2040{ 3653{
2041 if (expect_false (idleall)) 3654 if (ecb_expect_false (idleall))
2042 { 3655 {
2043 int pri; 3656 int pri;
2044 3657
2045 for (pri = NUMPRI; pri--; ) 3658 for (pri = NUMPRI; pri--; )
2046 { 3659 {
… …
2076 { 3689 {
2077 ev_at (w) += w->repeat; 3690 ev_at (w) += w->repeat;
2078 if (ev_at (w) < mn_now) 3691 if (ev_at (w) < mn_now)
2079 ev_at (w) = mn_now; 3692 ev_at (w) = mn_now;
2080 3693
2081 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.)));
2082 3695
2083 ANHE_at_cache (timers [HEAP0]); 3696 ANHE_at_cache (timers [HEAP0]);
2084 downheap (timers, timercnt, HEAP0); 3697 downheap (timers, timercnt, HEAP0);
2085 } 3698 }
2086 else 3699 else
… …
2089 EV_FREQUENT_CHECK; 3702 EV_FREQUENT_CHECK;
2090 feed_reverse (EV_A_ (W)w); 3703 feed_reverse (EV_A_ (W)w);
2091 } 3704 }
2092 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3705 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2093 3706
2094 feed_reverse_done (EV_A_ EV_TIMEOUT); 3707 feed_reverse_done (EV_A_ EV_TIMER);
2095 } 3708 }
2096} 3709}
2097 3710
2098#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
2099/* make periodics pending */ 3738/* make periodics pending */
2100inline_size void 3739inline_size void
2101periodics_reify (EV_P) 3740periodics_reify (EV_P)
2102{ 3741{
2103 EV_FREQUENT_CHECK; 3742 EV_FREQUENT_CHECK;
2104 3743
2105 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3744 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2106 { 3745 {
2107 int feed_count = 0;
2108
2109 do 3746 do
2110 { 3747 {
2111 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3748 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2112 3749
2113 /*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)));*/
… …
2122 ANHE_at_cache (periodics [HEAP0]); 3759 ANHE_at_cache (periodics [HEAP0]);
2123 downheap (periodics, periodiccnt, HEAP0); 3760 downheap (periodics, periodiccnt, HEAP0);
2124 } 3761 }
2125 else if (w->interval) 3762 else if (w->interval)
2126 { 3763 {
2127 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3764 periodic_recalc (EV_A_ w);
2128 /* if next trigger time is not sufficiently in the future, put it there */
2129 /* this might happen because of floating point inexactness */
2130 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2131 {
2132 ev_at (w) += w->interval;
2133
2134 /* if interval is unreasonably low we might still have a time in the past */
2135 /* so correct this. this will make the periodic very inexact, but the user */
2136 /* has effectively asked to get triggered more often than possible */
2137 if (ev_at (w) < ev_rt_now)
2138 ev_at (w) = ev_rt_now;
2139 }
2140
2141 ANHE_at_cache (periodics [HEAP0]); 3765 ANHE_at_cache (periodics [HEAP0]);
2142 downheap (periodics, periodiccnt, HEAP0); 3766 downheap (periodics, periodiccnt, HEAP0);
2143 } 3767 }
2144 else 3768 else
2145 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3769 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2152 feed_reverse_done (EV_A_ EV_PERIODIC); 3776 feed_reverse_done (EV_A_ EV_PERIODIC);
2153 } 3777 }
2154} 3778}
2155 3779
2156/* simply recalculate all periodics */ 3780/* simply recalculate all periodics */
2157/* 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? */
2158static void noinline 3782ecb_noinline ecb_cold
3783static void
2159periodics_reschedule (EV_P) 3784periodics_reschedule (EV_P)
2160{ 3785{
2161 int i; 3786 int i;
2162 3787
2163 /* adjust periodics after time jump */ 3788 /* adjust periodics after time jump */
… …
2166 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3791 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2167 3792
2168 if (w->reschedule_cb) 3793 if (w->reschedule_cb)
2169 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3794 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2170 else if (w->interval) 3795 else if (w->interval)
2171 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3796 periodic_recalc (EV_A_ w);
2172 3797
2173 ANHE_at_cache (periodics [i]); 3798 ANHE_at_cache (periodics [i]);
2174 } 3799 }
2175 3800
2176 reheap (periodics, periodiccnt); 3801 reheap (periodics, periodiccnt);
2177} 3802}
2178#endif 3803#endif
2179 3804
2180/* adjust all timers by a given offset */ 3805/* adjust all timers by a given offset */
2181static void noinline 3806ecb_noinline ecb_cold
3807static void
2182timers_reschedule (EV_P_ ev_tstamp adjust) 3808timers_reschedule (EV_P_ ev_tstamp adjust)
2183{ 3809{
2184 int i; 3810 int i;
2185 3811
2186 for (i = 0; i < timercnt; ++i) 3812 for (i = 0; i < timercnt; ++i)
… …
2195/* also detect if there was a timejump, and act accordingly */ 3821/* also detect if there was a timejump, and act accordingly */
2196inline_speed void 3822inline_speed void
2197time_update (EV_P_ ev_tstamp max_block) 3823time_update (EV_P_ ev_tstamp max_block)
2198{ 3824{
2199#if EV_USE_MONOTONIC 3825#if EV_USE_MONOTONIC
2200 if (expect_true (have_monotonic)) 3826 if (ecb_expect_true (have_monotonic))
2201 { 3827 {
2202 int i; 3828 int i;
2203 ev_tstamp odiff = rtmn_diff; 3829 ev_tstamp odiff = rtmn_diff;
2204 3830
2205 mn_now = get_clock (); 3831 mn_now = get_clock ();
2206 3832
2207 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3833 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2208 /* interpolate in the meantime */ 3834 /* interpolate in the meantime */
2209 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)))
2210 { 3836 {
2211 ev_rt_now = rtmn_diff + mn_now; 3837 ev_rt_now = rtmn_diff + mn_now;
2212 return; 3838 return;
2213 } 3839 }
2214 3840
… …
2223 * 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
2224 * in the unlikely event of having been preempted here. 3850 * in the unlikely event of having been preempted here.
2225 */ 3851 */
2226 for (i = 4; --i; ) 3852 for (i = 4; --i; )
2227 { 3853 {
3854 ev_tstamp diff;
2228 rtmn_diff = ev_rt_now - mn_now; 3855 rtmn_diff = ev_rt_now - mn_now;
2229 3856
2230 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)))
2231 return; /* all is well */ 3860 return; /* all is well */
2232 3861
2233 ev_rt_now = ev_time (); 3862 ev_rt_now = ev_time ();
2234 mn_now = get_clock (); 3863 mn_now = get_clock ();
2235 now_floor = mn_now; 3864 now_floor = mn_now;
… …
2244 else 3873 else
2245#endif 3874#endif
2246 { 3875 {
2247 ev_rt_now = ev_time (); 3876 ev_rt_now = ev_time ();
2248 3877
2249 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)))
2250 { 3879 {
2251 /* 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 */
2252 timers_reschedule (EV_A_ ev_rt_now - mn_now); 3881 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2253#if EV_PERIODIC_ENABLE 3882#if EV_PERIODIC_ENABLE
2254 periodics_reschedule (EV_A); 3883 periodics_reschedule (EV_A);
… …
2257 3886
2258 mn_now = ev_rt_now; 3887 mn_now = ev_rt_now;
2259 } 3888 }
2260} 3889}
2261 3890
2262void 3891int
2263ev_loop (EV_P_ int flags) 3892ev_run (EV_P_ int flags)
2264{ 3893{
2265#if EV_MINIMAL < 2 3894#if EV_FEATURE_API
2266 ++loop_depth; 3895 ++loop_depth;
2267#endif 3896#endif
2268 3897
2269 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));
2270 3899
2271 loop_done = EVUNLOOP_CANCEL; 3900 loop_done = EVBREAK_CANCEL;
2272 3901
2273 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 */
2274 3903
2275 do 3904 do
2276 { 3905 {
2277#if EV_VERIFY >= 2 3906#if EV_VERIFY >= 2
2278 ev_loop_verify (EV_A); 3907 ev_verify (EV_A);
2279#endif 3908#endif
2280 3909
2281#ifndef _WIN32 3910#ifndef _WIN32
2282 if (expect_false (curpid)) /* penalise the forking check even more */ 3911 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
2283 if (expect_false (getpid () != curpid)) 3912 if (ecb_expect_false (getpid () != curpid))
2284 { 3913 {
2285 curpid = getpid (); 3914 curpid = getpid ();
2286 postfork = 1; 3915 postfork = 1;
2287 } 3916 }
2288#endif 3917#endif
2289 3918
2290#if EV_FORK_ENABLE 3919#if EV_FORK_ENABLE
2291 /* we might have forked, so queue fork handlers */ 3920 /* we might have forked, so queue fork handlers */
2292 if (expect_false (postfork)) 3921 if (ecb_expect_false (postfork))
2293 if (forkcnt) 3922 if (forkcnt)
2294 { 3923 {
2295 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3924 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2296 EV_INVOKE_PENDING; 3925 EV_INVOKE_PENDING;
2297 } 3926 }
2298#endif 3927#endif
2299 3928
3929#if EV_PREPARE_ENABLE
2300 /* queue prepare watchers (and execute them) */ 3930 /* queue prepare watchers (and execute them) */
2301 if (expect_false (preparecnt)) 3931 if (ecb_expect_false (preparecnt))
2302 { 3932 {
2303 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3933 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2304 EV_INVOKE_PENDING; 3934 EV_INVOKE_PENDING;
2305 } 3935 }
3936#endif
2306 3937
2307 if (expect_false (loop_done)) 3938 if (ecb_expect_false (loop_done))
2308 break; 3939 break;
2309 3940
2310 /* we might have forked, so reify kernel state if necessary */ 3941 /* we might have forked, so reify kernel state if necessary */
2311 if (expect_false (postfork)) 3942 if (ecb_expect_false (postfork))
2312 loop_fork (EV_A); 3943 loop_fork (EV_A);
2313 3944
2314 /* update fd-related kernel structures */ 3945 /* update fd-related kernel structures */
2315 fd_reify (EV_A); 3946 fd_reify (EV_A);
2316 3947
2317 /* calculate blocking time */ 3948 /* calculate blocking time */
2318 { 3949 {
2319 ev_tstamp waittime = 0.; 3950 ev_tstamp waittime = 0.;
2320 ev_tstamp sleeptime = 0.; 3951 ev_tstamp sleeptime = 0.;
2321 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
2322 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3964 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2323 { 3965 {
2324 /* remember old timestamp for io_blocktime calculation */
2325 ev_tstamp prev_mn_now = mn_now;
2326
2327 /* update time to cancel out callback processing overhead */
2328 time_update (EV_A_ 1e100);
2329
2330 waittime = MAX_BLOCKTIME; 3966 waittime = EV_TS_CONST (MAX_BLOCKTIME);
2331 3967
2332 if (timercnt) 3968 if (timercnt)
2333 { 3969 {
2334 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3970 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2335 if (waittime > to) waittime = to; 3971 if (waittime > to) waittime = to;
2336 } 3972 }
2337 3973
2338#if EV_PERIODIC_ENABLE 3974#if EV_PERIODIC_ENABLE
2339 if (periodiccnt) 3975 if (periodiccnt)
2340 { 3976 {
2341 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3977 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2342 if (waittime > to) waittime = to; 3978 if (waittime > to) waittime = to;
2343 } 3979 }
2344#endif 3980#endif
2345 3981
2346 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3982 /* don't let timeouts decrease the waittime below timeout_blocktime */
2347 if (expect_false (waittime < timeout_blocktime)) 3983 if (ecb_expect_false (waittime < timeout_blocktime))
2348 waittime = timeout_blocktime; 3984 waittime = timeout_blocktime;
2349 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
2350 /* extra check because io_blocktime is commonly 0 */ 3996 /* extra check because io_blocktime is commonly 0 */
2351 if (expect_false (io_blocktime)) 3997 if (ecb_expect_false (io_blocktime))
2352 { 3998 {
2353 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3999 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2354 4000
2355 if (sleeptime > waittime - backend_fudge) 4001 if (sleeptime > waittime - backend_mintime)
2356 sleeptime = waittime - backend_fudge; 4002 sleeptime = waittime - backend_mintime;
2357 4003
2358 if (expect_true (sleeptime > 0.)) 4004 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
2359 { 4005 {
2360 ev_sleep (sleeptime); 4006 ev_sleep (sleeptime);
2361 waittime -= sleeptime; 4007 waittime -= sleeptime;
2362 } 4008 }
2363 } 4009 }
2364 } 4010 }
2365 4011
2366#if EV_MINIMAL < 2 4012#if EV_FEATURE_API
2367 ++loop_count; 4013 ++loop_count;
2368#endif 4014#endif
2369 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 4015 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2370 backend_poll (EV_A_ waittime); 4016 backend_poll (EV_A_ waittime);
2371 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 }
2372 4027
2373 /* update ev_rt_now, do magic */ 4028 /* update ev_rt_now, do magic */
2374 time_update (EV_A_ waittime + sleeptime); 4029 time_update (EV_A_ waittime + sleeptime);
2375 } 4030 }
2376 4031
… …
2383#if EV_IDLE_ENABLE 4038#if EV_IDLE_ENABLE
2384 /* queue idle watchers unless other events are pending */ 4039 /* queue idle watchers unless other events are pending */
2385 idle_reify (EV_A); 4040 idle_reify (EV_A);
2386#endif 4041#endif
2387 4042
4043#if EV_CHECK_ENABLE
2388 /* queue check watchers, to be executed first */ 4044 /* queue check watchers, to be executed first */
2389 if (expect_false (checkcnt)) 4045 if (ecb_expect_false (checkcnt))
2390 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 4046 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
4047#endif
2391 4048
2392 EV_INVOKE_PENDING; 4049 EV_INVOKE_PENDING;
2393 } 4050 }
2394 while (expect_true ( 4051 while (ecb_expect_true (
2395 activecnt 4052 activecnt
2396 && !loop_done 4053 && !loop_done
2397 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 4054 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2398 )); 4055 ));
2399 4056
2400 if (loop_done == EVUNLOOP_ONE) 4057 if (loop_done == EVBREAK_ONE)
2401 loop_done = EVUNLOOP_CANCEL; 4058 loop_done = EVBREAK_CANCEL;
2402 4059
2403#if EV_MINIMAL < 2 4060#if EV_FEATURE_API
2404 --loop_depth; 4061 --loop_depth;
2405#endif 4062#endif
2406}
2407 4063
4064 return activecnt;
4065}
4066
2408void 4067void
2409ev_unloop (EV_P_ int how) 4068ev_break (EV_P_ int how) EV_NOEXCEPT
2410{ 4069{
2411 loop_done = how; 4070 loop_done = how;
2412} 4071}
2413 4072
2414void 4073void
2415ev_ref (EV_P) 4074ev_ref (EV_P) EV_NOEXCEPT
2416{ 4075{
2417 ++activecnt; 4076 ++activecnt;
2418} 4077}
2419 4078
2420void 4079void
2421ev_unref (EV_P) 4080ev_unref (EV_P) EV_NOEXCEPT
2422{ 4081{
2423 --activecnt; 4082 --activecnt;
2424} 4083}
2425 4084
2426void 4085void
2427ev_now_update (EV_P) 4086ev_now_update (EV_P) EV_NOEXCEPT
2428{ 4087{
2429 time_update (EV_A_ 1e100); 4088 time_update (EV_A_ EV_TSTAMP_HUGE);
2430} 4089}
2431 4090
2432void 4091void
2433ev_suspend (EV_P) 4092ev_suspend (EV_P) EV_NOEXCEPT
2434{ 4093{
2435 ev_now_update (EV_A); 4094 ev_now_update (EV_A);
2436} 4095}
2437 4096
2438void 4097void
2439ev_resume (EV_P) 4098ev_resume (EV_P) EV_NOEXCEPT
2440{ 4099{
2441 ev_tstamp mn_prev = mn_now; 4100 ev_tstamp mn_prev = mn_now;
2442 4101
2443 ev_now_update (EV_A); 4102 ev_now_update (EV_A);
2444 timers_reschedule (EV_A_ mn_now - mn_prev); 4103 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2461inline_size void 4120inline_size void
2462wlist_del (WL *head, WL elem) 4121wlist_del (WL *head, WL elem)
2463{ 4122{
2464 while (*head) 4123 while (*head)
2465 { 4124 {
2466 if (expect_true (*head == elem)) 4125 if (ecb_expect_true (*head == elem))
2467 { 4126 {
2468 *head = elem->next; 4127 *head = elem->next;
2469 break; 4128 break;
2470 } 4129 }
2471 4130
… …
2483 w->pending = 0; 4142 w->pending = 0;
2484 } 4143 }
2485} 4144}
2486 4145
2487int 4146int
2488ev_clear_pending (EV_P_ void *w) 4147ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2489{ 4148{
2490 W w_ = (W)w; 4149 W w_ = (W)w;
2491 int pending = w_->pending; 4150 int pending = w_->pending;
2492 4151
2493 if (expect_true (pending)) 4152 if (ecb_expect_true (pending))
2494 { 4153 {
2495 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4154 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2496 p->w = (W)&pending_w; 4155 p->w = (W)&pending_w;
2497 w_->pending = 0; 4156 w_->pending = 0;
2498 return p->events; 4157 return p->events;
… …
2525 w->active = 0; 4184 w->active = 0;
2526} 4185}
2527 4186
2528/*****************************************************************************/ 4187/*****************************************************************************/
2529 4188
2530void noinline 4189ecb_noinline
4190void
2531ev_io_start (EV_P_ ev_io *w) 4191ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2532{ 4192{
2533 int fd = w->fd; 4193 int fd = w->fd;
2534 4194
2535 if (expect_false (ev_is_active (w))) 4195 if (ecb_expect_false (ev_is_active (w)))
2536 return; 4196 return;
2537 4197
2538 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 4198 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2539 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))));
2540 4200
4201#if EV_VERIFY >= 2
4202 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4203#endif
2541 EV_FREQUENT_CHECK; 4204 EV_FREQUENT_CHECK;
2542 4205
2543 ev_start (EV_A_ (W)w, 1); 4206 ev_start (EV_A_ (W)w, 1);
2544 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 4207 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2545 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));
2546 4212
2547 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);
2548 w->events &= ~EV__IOFDSET; 4214 w->events &= ~EV__IOFDSET;
2549 4215
2550 EV_FREQUENT_CHECK; 4216 EV_FREQUENT_CHECK;
2551} 4217}
2552 4218
2553void noinline 4219ecb_noinline
4220void
2554ev_io_stop (EV_P_ ev_io *w) 4221ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2555{ 4222{
2556 clear_pending (EV_A_ (W)w); 4223 clear_pending (EV_A_ (W)w);
2557 if (expect_false (!ev_is_active (w))) 4224 if (ecb_expect_false (!ev_is_active (w)))
2558 return; 4225 return;
2559 4226
2560 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));
2561 4228
4229#if EV_VERIFY >= 2
4230 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4231#endif
2562 EV_FREQUENT_CHECK; 4232 EV_FREQUENT_CHECK;
2563 4233
2564 wlist_del (&anfds[w->fd].head, (WL)w); 4234 wlist_del (&anfds[w->fd].head, (WL)w);
2565 ev_stop (EV_A_ (W)w); 4235 ev_stop (EV_A_ (W)w);
2566 4236
2567 fd_change (EV_A_ w->fd, 1); 4237 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2568 4238
2569 EV_FREQUENT_CHECK; 4239 EV_FREQUENT_CHECK;
2570} 4240}
2571 4241
2572void noinline 4242ecb_noinline
4243void
2573ev_timer_start (EV_P_ ev_timer *w) 4244ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2574{ 4245{
2575 if (expect_false (ev_is_active (w))) 4246 if (ecb_expect_false (ev_is_active (w)))
2576 return; 4247 return;
2577 4248
2578 ev_at (w) += mn_now; 4249 ev_at (w) += mn_now;
2579 4250
2580 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.));
2581 4252
2582 EV_FREQUENT_CHECK; 4253 EV_FREQUENT_CHECK;
2583 4254
2584 ++timercnt; 4255 ++timercnt;
2585 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 4256 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2586 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 4257 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2587 ANHE_w (timers [ev_active (w)]) = (WT)w; 4258 ANHE_w (timers [ev_active (w)]) = (WT)w;
2588 ANHE_at_cache (timers [ev_active (w)]); 4259 ANHE_at_cache (timers [ev_active (w)]);
2589 upheap (timers, ev_active (w)); 4260 upheap (timers, ev_active (w));
2590 4261
2591 EV_FREQUENT_CHECK; 4262 EV_FREQUENT_CHECK;
2592 4263
2593 /*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));*/
2594} 4265}
2595 4266
2596void noinline 4267ecb_noinline
4268void
2597ev_timer_stop (EV_P_ ev_timer *w) 4269ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2598{ 4270{
2599 clear_pending (EV_A_ (W)w); 4271 clear_pending (EV_A_ (W)w);
2600 if (expect_false (!ev_is_active (w))) 4272 if (ecb_expect_false (!ev_is_active (w)))
2601 return; 4273 return;
2602 4274
2603 EV_FREQUENT_CHECK; 4275 EV_FREQUENT_CHECK;
2604 4276
2605 { 4277 {
… …
2607 4279
2608 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));
2609 4281
2610 --timercnt; 4282 --timercnt;
2611 4283
2612 if (expect_true (active < timercnt + HEAP0)) 4284 if (ecb_expect_true (active < timercnt + HEAP0))
2613 { 4285 {
2614 timers [active] = timers [timercnt + HEAP0]; 4286 timers [active] = timers [timercnt + HEAP0];
2615 adjustheap (timers, timercnt, active); 4287 adjustheap (timers, timercnt, active);
2616 } 4288 }
2617 } 4289 }
… …
2621 ev_stop (EV_A_ (W)w); 4293 ev_stop (EV_A_ (W)w);
2622 4294
2623 EV_FREQUENT_CHECK; 4295 EV_FREQUENT_CHECK;
2624} 4296}
2625 4297
2626void noinline 4298ecb_noinline
4299void
2627ev_timer_again (EV_P_ ev_timer *w) 4300ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2628{ 4301{
2629 EV_FREQUENT_CHECK; 4302 EV_FREQUENT_CHECK;
4303
4304 clear_pending (EV_A_ (W)w);
2630 4305
2631 if (ev_is_active (w)) 4306 if (ev_is_active (w))
2632 { 4307 {
2633 if (w->repeat) 4308 if (w->repeat)
2634 { 4309 {
… …
2647 4322
2648 EV_FREQUENT_CHECK; 4323 EV_FREQUENT_CHECK;
2649} 4324}
2650 4325
2651ev_tstamp 4326ev_tstamp
2652ev_timer_remaining (EV_P_ ev_timer *w) 4327ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2653{ 4328{
2654 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.));
2655} 4330}
2656 4331
2657#if EV_PERIODIC_ENABLE 4332#if EV_PERIODIC_ENABLE
2658void noinline 4333ecb_noinline
4334void
2659ev_periodic_start (EV_P_ ev_periodic *w) 4335ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2660{ 4336{
2661 if (expect_false (ev_is_active (w))) 4337 if (ecb_expect_false (ev_is_active (w)))
2662 return; 4338 return;
4339
4340#if EV_USE_TIMERFD
4341 if (timerfd == -2)
4342 evtimerfd_init (EV_A);
4343#endif
2663 4344
2664 if (w->reschedule_cb) 4345 if (w->reschedule_cb)
2665 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4346 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2666 else if (w->interval) 4347 else if (w->interval)
2667 { 4348 {
2668 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.));
2669 /* this formula differs from the one in periodic_reify because we do not always round up */ 4350 periodic_recalc (EV_A_ w);
2670 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2671 } 4351 }
2672 else 4352 else
2673 ev_at (w) = w->offset; 4353 ev_at (w) = w->offset;
2674 4354
2675 EV_FREQUENT_CHECK; 4355 EV_FREQUENT_CHECK;
2676 4356
2677 ++periodiccnt; 4357 ++periodiccnt;
2678 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4358 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2679 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4359 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2680 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4360 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2681 ANHE_at_cache (periodics [ev_active (w)]); 4361 ANHE_at_cache (periodics [ev_active (w)]);
2682 upheap (periodics, ev_active (w)); 4362 upheap (periodics, ev_active (w));
2683 4363
2684 EV_FREQUENT_CHECK; 4364 EV_FREQUENT_CHECK;
2685 4365
2686 /*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));*/
2687} 4367}
2688 4368
2689void noinline 4369ecb_noinline
4370void
2690ev_periodic_stop (EV_P_ ev_periodic *w) 4371ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2691{ 4372{
2692 clear_pending (EV_A_ (W)w); 4373 clear_pending (EV_A_ (W)w);
2693 if (expect_false (!ev_is_active (w))) 4374 if (ecb_expect_false (!ev_is_active (w)))
2694 return; 4375 return;
2695 4376
2696 EV_FREQUENT_CHECK; 4377 EV_FREQUENT_CHECK;
2697 4378
2698 { 4379 {
… …
2700 4381
2701 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));
2702 4383
2703 --periodiccnt; 4384 --periodiccnt;
2704 4385
2705 if (expect_true (active < periodiccnt + HEAP0)) 4386 if (ecb_expect_true (active < periodiccnt + HEAP0))
2706 { 4387 {
2707 periodics [active] = periodics [periodiccnt + HEAP0]; 4388 periodics [active] = periodics [periodiccnt + HEAP0];
2708 adjustheap (periodics, periodiccnt, active); 4389 adjustheap (periodics, periodiccnt, active);
2709 } 4390 }
2710 } 4391 }
… …
2712 ev_stop (EV_A_ (W)w); 4393 ev_stop (EV_A_ (W)w);
2713 4394
2714 EV_FREQUENT_CHECK; 4395 EV_FREQUENT_CHECK;
2715} 4396}
2716 4397
2717void noinline 4398ecb_noinline
4399void
2718ev_periodic_again (EV_P_ ev_periodic *w) 4400ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2719{ 4401{
2720 /* TODO: use adjustheap and recalculation */ 4402 /* TODO: use adjustheap and recalculation */
2721 ev_periodic_stop (EV_A_ w); 4403 ev_periodic_stop (EV_A_ w);
2722 ev_periodic_start (EV_A_ w); 4404 ev_periodic_start (EV_A_ w);
2723} 4405}
… …
2725 4407
2726#ifndef SA_RESTART 4408#ifndef SA_RESTART
2727# define SA_RESTART 0 4409# define SA_RESTART 0
2728#endif 4410#endif
2729 4411
2730void noinline 4412#if EV_SIGNAL_ENABLE
4413
4414ecb_noinline
4415void
2731ev_signal_start (EV_P_ ev_signal *w) 4416ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2732{ 4417{
2733 if (expect_false (ev_is_active (w))) 4418 if (ecb_expect_false (ev_is_active (w)))
2734 return; 4419 return;
2735 4420
2736 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));
2737 4422
2738#if EV_MULTIPLICITY 4423#if EV_MULTIPLICITY
2739 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",
2740 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4425 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2741 4426
2742 signals [w->signum - 1].loop = EV_A; 4427 signals [w->signum - 1].loop = EV_A;
4428 ECB_MEMORY_FENCE_RELEASE;
2743#endif 4429#endif
2744 4430
2745 EV_FREQUENT_CHECK; 4431 EV_FREQUENT_CHECK;
2746 4432
2747#if EV_USE_SIGNALFD 4433#if EV_USE_SIGNALFD
… …
2794 sa.sa_handler = ev_sighandler; 4480 sa.sa_handler = ev_sighandler;
2795 sigfillset (&sa.sa_mask); 4481 sigfillset (&sa.sa_mask);
2796 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 */
2797 sigaction (w->signum, &sa, 0); 4483 sigaction (w->signum, &sa, 0);
2798 4484
4485 if (origflags & EVFLAG_NOSIGMASK)
4486 {
2799 sigemptyset (&sa.sa_mask); 4487 sigemptyset (&sa.sa_mask);
2800 sigaddset (&sa.sa_mask, w->signum); 4488 sigaddset (&sa.sa_mask, w->signum);
2801 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4489 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4490 }
2802#endif 4491#endif
2803 } 4492 }
2804 4493
2805 EV_FREQUENT_CHECK; 4494 EV_FREQUENT_CHECK;
2806} 4495}
2807 4496
2808void noinline 4497ecb_noinline
4498void
2809ev_signal_stop (EV_P_ ev_signal *w) 4499ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2810{ 4500{
2811 clear_pending (EV_A_ (W)w); 4501 clear_pending (EV_A_ (W)w);
2812 if (expect_false (!ev_is_active (w))) 4502 if (ecb_expect_false (!ev_is_active (w)))
2813 return; 4503 return;
2814 4504
2815 EV_FREQUENT_CHECK; 4505 EV_FREQUENT_CHECK;
2816 4506
2817 wlist_del (&signals [w->signum - 1].head, (WL)w); 4507 wlist_del (&signals [w->signum - 1].head, (WL)w);
… …
2840 } 4530 }
2841 4531
2842 EV_FREQUENT_CHECK; 4532 EV_FREQUENT_CHECK;
2843} 4533}
2844 4534
4535#endif
4536
4537#if EV_CHILD_ENABLE
4538
2845void 4539void
2846ev_child_start (EV_P_ ev_child *w) 4540ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2847{ 4541{
2848#if EV_MULTIPLICITY 4542#if EV_MULTIPLICITY
2849 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));
2850#endif 4544#endif
2851 if (expect_false (ev_is_active (w))) 4545 if (ecb_expect_false (ev_is_active (w)))
2852 return; 4546 return;
2853 4547
2854 EV_FREQUENT_CHECK; 4548 EV_FREQUENT_CHECK;
2855 4549
2856 ev_start (EV_A_ (W)w, 1); 4550 ev_start (EV_A_ (W)w, 1);
2857 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4551 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2858 4552
2859 EV_FREQUENT_CHECK; 4553 EV_FREQUENT_CHECK;
2860} 4554}
2861 4555
2862void 4556void
2863ev_child_stop (EV_P_ ev_child *w) 4557ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2864{ 4558{
2865 clear_pending (EV_A_ (W)w); 4559 clear_pending (EV_A_ (W)w);
2866 if (expect_false (!ev_is_active (w))) 4560 if (ecb_expect_false (!ev_is_active (w)))
2867 return; 4561 return;
2868 4562
2869 EV_FREQUENT_CHECK; 4563 EV_FREQUENT_CHECK;
2870 4564
2871 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4565 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2872 ev_stop (EV_A_ (W)w); 4566 ev_stop (EV_A_ (W)w);
2873 4567
2874 EV_FREQUENT_CHECK; 4568 EV_FREQUENT_CHECK;
2875} 4569}
4570
4571#endif
2876 4572
2877#if EV_STAT_ENABLE 4573#if EV_STAT_ENABLE
2878 4574
2879# ifdef _WIN32 4575# ifdef _WIN32
2880# undef lstat 4576# undef lstat
… …
2883 4579
2884#define DEF_STAT_INTERVAL 5.0074891 4580#define DEF_STAT_INTERVAL 5.0074891
2885#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4581#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2886#define MIN_STAT_INTERVAL 0.1074891 4582#define MIN_STAT_INTERVAL 0.1074891
2887 4583
2888static 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);
2889 4585
2890#if EV_USE_INOTIFY 4586#if EV_USE_INOTIFY
2891 4587
2892/* 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 */
2893# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4589# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2894 4590
2895static void noinline 4591ecb_noinline
4592static void
2896infy_add (EV_P_ ev_stat *w) 4593infy_add (EV_P_ ev_stat *w)
2897{ 4594{
2898 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);
2899 4599
2900 if (w->wd >= 0) 4600 if (w->wd >= 0)
2901 { 4601 {
2902 struct statfs sfs; 4602 struct statfs sfs;
2903 4603
… …
2907 4607
2908 if (!fs_2625) 4608 if (!fs_2625)
2909 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4609 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2910 else if (!statfs (w->path, &sfs) 4610 else if (!statfs (w->path, &sfs)
2911 && (sfs.f_type == 0x1373 /* devfs */ 4611 && (sfs.f_type == 0x1373 /* devfs */
4612 || sfs.f_type == 0x4006 /* fat */
4613 || sfs.f_type == 0x4d44 /* msdos */
2912 || 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 */
2913 || sfs.f_type == 0x3153464a /* jfs */ 4618 || sfs.f_type == 0x3153464a /* jfs */
4619 || sfs.f_type == 0x9123683e /* btrfs */
2914 || sfs.f_type == 0x52654973 /* reiser3 */ 4620 || sfs.f_type == 0x52654973 /* reiser3 */
2915 || sfs.f_type == 0x01021994 /* tempfs */ 4621 || sfs.f_type == 0x01021994 /* tmpfs */
2916 || sfs.f_type == 0x58465342 /* xfs */)) 4622 || sfs.f_type == 0x58465342 /* xfs */))
2917 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4623 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2918 else 4624 else
2919 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 */
2920 } 4626 }
… …
2941 if (!pend || pend == path) 4647 if (!pend || pend == path)
2942 break; 4648 break;
2943 4649
2944 *pend = 0; 4650 *pend = 0;
2945 w->wd = inotify_add_watch (fs_fd, path, mask); 4651 w->wd = inotify_add_watch (fs_fd, path, mask);
2946 } 4652 }
2947 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4653 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2948 } 4654 }
2949 } 4655 }
2950 4656
2951 if (w->wd >= 0) 4657 if (w->wd >= 0)
2952 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);
2953 4659
2954 /* now re-arm timer, if required */ 4660 /* now re-arm timer, if required */
2955 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4661 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2956 ev_timer_again (EV_A_ &w->timer); 4662 ev_timer_again (EV_A_ &w->timer);
2957 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4663 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2958} 4664}
2959 4665
2960static void noinline 4666ecb_noinline
4667static void
2961infy_del (EV_P_ ev_stat *w) 4668infy_del (EV_P_ ev_stat *w)
2962{ 4669{
2963 int slot; 4670 int slot;
2964 int wd = w->wd; 4671 int wd = w->wd;
2965 4672
2966 if (wd < 0) 4673 if (wd < 0)
2967 return; 4674 return;
2968 4675
2969 w->wd = -2; 4676 w->wd = -2;
2970 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4677 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2971 wlist_del (&fs_hash [slot].head, (WL)w); 4678 wlist_del (&fs_hash [slot].head, (WL)w);
2972 4679
2973 /* remove this watcher, if others are watching it, they will rearm */ 4680 /* remove this watcher, if others are watching it, they will rearm */
2974 inotify_rm_watch (fs_fd, wd); 4681 inotify_rm_watch (fs_fd, wd);
2975} 4682}
2976 4683
2977static void noinline 4684ecb_noinline
4685static void
2978infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4686infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2979{ 4687{
2980 if (slot < 0) 4688 if (slot < 0)
2981 /* overflow, need to check for all hash slots */ 4689 /* overflow, need to check for all hash slots */
2982 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4690 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2983 infy_wd (EV_A_ slot, wd, ev); 4691 infy_wd (EV_A_ slot, wd, ev);
2984 else 4692 else
2985 { 4693 {
2986 WL w_; 4694 WL w_;
2987 4695
2988 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4696 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2989 { 4697 {
2990 ev_stat *w = (ev_stat *)w_; 4698 ev_stat *w = (ev_stat *)w_;
2991 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 */
2992 4700
2993 if (w->wd == wd || wd == -1) 4701 if (w->wd == wd || wd == -1)
2994 { 4702 {
2995 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4703 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2996 { 4704 {
2997 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);
2998 w->wd = -1; 4706 w->wd = -1;
2999 infy_add (EV_A_ w); /* re-add, no matter what */ 4707 infy_add (EV_A_ w); /* re-add, no matter what */
3000 } 4708 }
3001 4709
3002 stat_timer_cb (EV_A_ &w->timer, 0); 4710 stat_timer_cb (EV_A_ &w->timer, 0);
… …
3018 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4726 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3019 ofs += sizeof (struct inotify_event) + ev->len; 4727 ofs += sizeof (struct inotify_event) + ev->len;
3020 } 4728 }
3021} 4729}
3022 4730
3023inline_size unsigned int
3024ev_linux_version (void)
3025{
3026 struct utsname buf;
3027 unsigned int v;
3028 int i;
3029 char *p = buf.release;
3030
3031 if (uname (&buf))
3032 return 0;
3033
3034 for (i = 3+1; --i; )
3035 {
3036 unsigned int c = 0;
3037
3038 for (;;)
3039 {
3040 if (*p >= '0' && *p <= '9')
3041 c = c * 10 + *p++ - '0';
3042 else
3043 {
3044 p += *p == '.';
3045 break;
3046 }
3047 }
3048
3049 v = (v << 8) | c;
3050 }
3051
3052 return v;
3053}
3054
3055inline_size void 4731inline_size ecb_cold
4732void
3056ev_check_2625 (EV_P) 4733ev_check_2625 (EV_P)
3057{ 4734{
3058 /* kernels < 2.6.25 are borked 4735 /* kernels < 2.6.25 are borked
3059 * 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
3060 */ 4737 */
… …
3065} 4742}
3066 4743
3067inline_size int 4744inline_size int
3068infy_newfd (void) 4745infy_newfd (void)
3069{ 4746{
3070#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4747#if defined IN_CLOEXEC && defined IN_NONBLOCK
3071 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4748 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3072 if (fd >= 0) 4749 if (fd >= 0)
3073 return fd; 4750 return fd;
3074#endif 4751#endif
3075 return inotify_init (); 4752 return inotify_init ();
… …
3116 ev_io_set (&fs_w, fs_fd, EV_READ); 4793 ev_io_set (&fs_w, fs_fd, EV_READ);
3117 ev_io_start (EV_A_ &fs_w); 4794 ev_io_start (EV_A_ &fs_w);
3118 ev_unref (EV_A); 4795 ev_unref (EV_A);
3119 } 4796 }
3120 4797
3121 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4798 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3122 { 4799 {
3123 WL w_ = fs_hash [slot].head; 4800 WL w_ = fs_hash [slot].head;
3124 fs_hash [slot].head = 0; 4801 fs_hash [slot].head = 0;
3125 4802
3126 while (w_) 4803 while (w_)
… …
3150#else 4827#else
3151# define EV_LSTAT(p,b) lstat (p, b) 4828# define EV_LSTAT(p,b) lstat (p, b)
3152#endif 4829#endif
3153 4830
3154void 4831void
3155ev_stat_stat (EV_P_ ev_stat *w) 4832ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3156{ 4833{
3157 if (lstat (w->path, &w->attr) < 0) 4834 if (lstat (w->path, &w->attr) < 0)
3158 w->attr.st_nlink = 0; 4835 w->attr.st_nlink = 0;
3159 else if (!w->attr.st_nlink) 4836 else if (!w->attr.st_nlink)
3160 w->attr.st_nlink = 1; 4837 w->attr.st_nlink = 1;
3161} 4838}
3162 4839
3163static void noinline 4840ecb_noinline
4841static void
3164stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4842stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3165{ 4843{
3166 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4844 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3167 4845
3168 ev_statdata prev = w->attr; 4846 ev_statdata prev = w->attr;
… …
3199 ev_feed_event (EV_A_ w, EV_STAT); 4877 ev_feed_event (EV_A_ w, EV_STAT);
3200 } 4878 }
3201} 4879}
3202 4880
3203void 4881void
3204ev_stat_start (EV_P_ ev_stat *w) 4882ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3205{ 4883{
3206 if (expect_false (ev_is_active (w))) 4884 if (ecb_expect_false (ev_is_active (w)))
3207 return; 4885 return;
3208 4886
3209 ev_stat_stat (EV_A_ w); 4887 ev_stat_stat (EV_A_ w);
3210 4888
3211 if (w->interval < MIN_STAT_INTERVAL && w->interval) 4889 if (w->interval < MIN_STAT_INTERVAL && w->interval)
… …
3230 4908
3231 EV_FREQUENT_CHECK; 4909 EV_FREQUENT_CHECK;
3232} 4910}
3233 4911
3234void 4912void
3235ev_stat_stop (EV_P_ ev_stat *w) 4913ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3236{ 4914{
3237 clear_pending (EV_A_ (W)w); 4915 clear_pending (EV_A_ (W)w);
3238 if (expect_false (!ev_is_active (w))) 4916 if (ecb_expect_false (!ev_is_active (w)))
3239 return; 4917 return;
3240 4918
3241 EV_FREQUENT_CHECK; 4919 EV_FREQUENT_CHECK;
3242 4920
3243#if EV_USE_INOTIFY 4921#if EV_USE_INOTIFY
… …
3256} 4934}
3257#endif 4935#endif
3258 4936
3259#if EV_IDLE_ENABLE 4937#if EV_IDLE_ENABLE
3260void 4938void
3261ev_idle_start (EV_P_ ev_idle *w) 4939ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3262{ 4940{
3263 if (expect_false (ev_is_active (w))) 4941 if (ecb_expect_false (ev_is_active (w)))
3264 return; 4942 return;
3265 4943
3266 pri_adjust (EV_A_ (W)w); 4944 pri_adjust (EV_A_ (W)w);
3267 4945
3268 EV_FREQUENT_CHECK; 4946 EV_FREQUENT_CHECK;
… …
3271 int active = ++idlecnt [ABSPRI (w)]; 4949 int active = ++idlecnt [ABSPRI (w)];
3272 4950
3273 ++idleall; 4951 ++idleall;
3274 ev_start (EV_A_ (W)w, active); 4952 ev_start (EV_A_ (W)w, active);
3275 4953
3276 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);
3277 idles [ABSPRI (w)][active - 1] = w; 4955 idles [ABSPRI (w)][active - 1] = w;
3278 } 4956 }
3279 4957
3280 EV_FREQUENT_CHECK; 4958 EV_FREQUENT_CHECK;
3281} 4959}
3282 4960
3283void 4961void
3284ev_idle_stop (EV_P_ ev_idle *w) 4962ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3285{ 4963{
3286 clear_pending (EV_A_ (W)w); 4964 clear_pending (EV_A_ (W)w);
3287 if (expect_false (!ev_is_active (w))) 4965 if (ecb_expect_false (!ev_is_active (w)))
3288 return; 4966 return;
3289 4967
3290 EV_FREQUENT_CHECK; 4968 EV_FREQUENT_CHECK;
3291 4969
3292 { 4970 {
… …
3301 4979
3302 EV_FREQUENT_CHECK; 4980 EV_FREQUENT_CHECK;
3303} 4981}
3304#endif 4982#endif
3305 4983
4984#if EV_PREPARE_ENABLE
3306void 4985void
3307ev_prepare_start (EV_P_ ev_prepare *w) 4986ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3308{ 4987{
3309 if (expect_false (ev_is_active (w))) 4988 if (ecb_expect_false (ev_is_active (w)))
3310 return; 4989 return;
3311 4990
3312 EV_FREQUENT_CHECK; 4991 EV_FREQUENT_CHECK;
3313 4992
3314 ev_start (EV_A_ (W)w, ++preparecnt); 4993 ev_start (EV_A_ (W)w, ++preparecnt);
3315 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4994 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3316 prepares [preparecnt - 1] = w; 4995 prepares [preparecnt - 1] = w;
3317 4996
3318 EV_FREQUENT_CHECK; 4997 EV_FREQUENT_CHECK;
3319} 4998}
3320 4999
3321void 5000void
3322ev_prepare_stop (EV_P_ ev_prepare *w) 5001ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3323{ 5002{
3324 clear_pending (EV_A_ (W)w); 5003 clear_pending (EV_A_ (W)w);
3325 if (expect_false (!ev_is_active (w))) 5004 if (ecb_expect_false (!ev_is_active (w)))
3326 return; 5005 return;
3327 5006
3328 EV_FREQUENT_CHECK; 5007 EV_FREQUENT_CHECK;
3329 5008
3330 { 5009 {
… …
3336 5015
3337 ev_stop (EV_A_ (W)w); 5016 ev_stop (EV_A_ (W)w);
3338 5017
3339 EV_FREQUENT_CHECK; 5018 EV_FREQUENT_CHECK;
3340} 5019}
5020#endif
3341 5021
5022#if EV_CHECK_ENABLE
3342void 5023void
3343ev_check_start (EV_P_ ev_check *w) 5024ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3344{ 5025{
3345 if (expect_false (ev_is_active (w))) 5026 if (ecb_expect_false (ev_is_active (w)))
3346 return; 5027 return;
3347 5028
3348 EV_FREQUENT_CHECK; 5029 EV_FREQUENT_CHECK;
3349 5030
3350 ev_start (EV_A_ (W)w, ++checkcnt); 5031 ev_start (EV_A_ (W)w, ++checkcnt);
3351 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 5032 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3352 checks [checkcnt - 1] = w; 5033 checks [checkcnt - 1] = w;
3353 5034
3354 EV_FREQUENT_CHECK; 5035 EV_FREQUENT_CHECK;
3355} 5036}
3356 5037
3357void 5038void
3358ev_check_stop (EV_P_ ev_check *w) 5039ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3359{ 5040{
3360 clear_pending (EV_A_ (W)w); 5041 clear_pending (EV_A_ (W)w);
3361 if (expect_false (!ev_is_active (w))) 5042 if (ecb_expect_false (!ev_is_active (w)))
3362 return; 5043 return;
3363 5044
3364 EV_FREQUENT_CHECK; 5045 EV_FREQUENT_CHECK;
3365 5046
3366 { 5047 {
… …
3372 5053
3373 ev_stop (EV_A_ (W)w); 5054 ev_stop (EV_A_ (W)w);
3374 5055
3375 EV_FREQUENT_CHECK; 5056 EV_FREQUENT_CHECK;
3376} 5057}
5058#endif
3377 5059
3378#if EV_EMBED_ENABLE 5060#if EV_EMBED_ENABLE
3379void noinline 5061ecb_noinline
5062void
3380ev_embed_sweep (EV_P_ ev_embed *w) 5063ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3381{ 5064{
3382 ev_loop (w->other, EVLOOP_NONBLOCK); 5065 ev_run (w->other, EVRUN_NOWAIT);
3383} 5066}
3384 5067
3385static void 5068static void
3386embed_io_cb (EV_P_ ev_io *io, int revents) 5069embed_io_cb (EV_P_ ev_io *io, int revents)
3387{ 5070{
3388 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 5071 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3389 5072
3390 if (ev_cb (w)) 5073 if (ev_cb (w))
3391 ev_feed_event (EV_A_ (W)w, EV_EMBED); 5074 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3392 else 5075 else
3393 ev_loop (w->other, EVLOOP_NONBLOCK); 5076 ev_run (w->other, EVRUN_NOWAIT);
3394} 5077}
3395 5078
3396static void 5079static void
3397embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 5080embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3398{ 5081{
… …
3402 EV_P = w->other; 5085 EV_P = w->other;
3403 5086
3404 while (fdchangecnt) 5087 while (fdchangecnt)
3405 { 5088 {
3406 fd_reify (EV_A); 5089 fd_reify (EV_A);
3407 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5090 ev_run (EV_A_ EVRUN_NOWAIT);
3408 } 5091 }
3409 } 5092 }
3410} 5093}
3411 5094
5095#if EV_FORK_ENABLE
3412static void 5096static void
3413embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5097embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3414{ 5098{
3415 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));
3416 5100
… …
3418 5102
3419 { 5103 {
3420 EV_P = w->other; 5104 EV_P = w->other;
3421 5105
3422 ev_loop_fork (EV_A); 5106 ev_loop_fork (EV_A);
3423 ev_loop (EV_A_ EVLOOP_NONBLOCK); 5107 ev_run (EV_A_ EVRUN_NOWAIT);
3424 } 5108 }
3425 5109
3426 ev_embed_start (EV_A_ w); 5110 ev_embed_start (EV_A_ w);
3427} 5111}
5112#endif
3428 5113
3429#if 0 5114#if 0
3430static void 5115static void
3431embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5116embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3432{ 5117{
3433 ev_idle_stop (EV_A_ idle); 5118 ev_idle_stop (EV_A_ idle);
3434} 5119}
3435#endif 5120#endif
3436 5121
3437void 5122void
3438ev_embed_start (EV_P_ ev_embed *w) 5123ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3439{ 5124{
3440 if (expect_false (ev_is_active (w))) 5125 if (ecb_expect_false (ev_is_active (w)))
3441 return; 5126 return;
3442 5127
3443 { 5128 {
3444 EV_P = w->other; 5129 EV_P = w->other;
3445 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 ()));
… …
3453 5138
3454 ev_prepare_init (&w->prepare, embed_prepare_cb); 5139 ev_prepare_init (&w->prepare, embed_prepare_cb);
3455 ev_set_priority (&w->prepare, EV_MINPRI); 5140 ev_set_priority (&w->prepare, EV_MINPRI);
3456 ev_prepare_start (EV_A_ &w->prepare); 5141 ev_prepare_start (EV_A_ &w->prepare);
3457 5142
5143#if EV_FORK_ENABLE
3458 ev_fork_init (&w->fork, embed_fork_cb); 5144 ev_fork_init (&w->fork, embed_fork_cb);
3459 ev_fork_start (EV_A_ &w->fork); 5145 ev_fork_start (EV_A_ &w->fork);
5146#endif
3460 5147
3461 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5148 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3462 5149
3463 ev_start (EV_A_ (W)w, 1); 5150 ev_start (EV_A_ (W)w, 1);
3464 5151
3465 EV_FREQUENT_CHECK; 5152 EV_FREQUENT_CHECK;
3466} 5153}
3467 5154
3468void 5155void
3469ev_embed_stop (EV_P_ ev_embed *w) 5156ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3470{ 5157{
3471 clear_pending (EV_A_ (W)w); 5158 clear_pending (EV_A_ (W)w);
3472 if (expect_false (!ev_is_active (w))) 5159 if (ecb_expect_false (!ev_is_active (w)))
3473 return; 5160 return;
3474 5161
3475 EV_FREQUENT_CHECK; 5162 EV_FREQUENT_CHECK;
3476 5163
3477 ev_io_stop (EV_A_ &w->io); 5164 ev_io_stop (EV_A_ &w->io);
3478 ev_prepare_stop (EV_A_ &w->prepare); 5165 ev_prepare_stop (EV_A_ &w->prepare);
5166#if EV_FORK_ENABLE
3479 ev_fork_stop (EV_A_ &w->fork); 5167 ev_fork_stop (EV_A_ &w->fork);
5168#endif
3480 5169
3481 ev_stop (EV_A_ (W)w); 5170 ev_stop (EV_A_ (W)w);
3482 5171
3483 EV_FREQUENT_CHECK; 5172 EV_FREQUENT_CHECK;
3484} 5173}
3485#endif 5174#endif
3486 5175
3487#if EV_FORK_ENABLE 5176#if EV_FORK_ENABLE
3488void 5177void
3489ev_fork_start (EV_P_ ev_fork *w) 5178ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3490{ 5179{
3491 if (expect_false (ev_is_active (w))) 5180 if (ecb_expect_false (ev_is_active (w)))
3492 return; 5181 return;
3493 5182
3494 EV_FREQUENT_CHECK; 5183 EV_FREQUENT_CHECK;
3495 5184
3496 ev_start (EV_A_ (W)w, ++forkcnt); 5185 ev_start (EV_A_ (W)w, ++forkcnt);
3497 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5186 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3498 forks [forkcnt - 1] = w; 5187 forks [forkcnt - 1] = w;
3499 5188
3500 EV_FREQUENT_CHECK; 5189 EV_FREQUENT_CHECK;
3501} 5190}
3502 5191
3503void 5192void
3504ev_fork_stop (EV_P_ ev_fork *w) 5193ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3505{ 5194{
3506 clear_pending (EV_A_ (W)w); 5195 clear_pending (EV_A_ (W)w);
3507 if (expect_false (!ev_is_active (w))) 5196 if (ecb_expect_false (!ev_is_active (w)))
3508 return; 5197 return;
3509 5198
3510 EV_FREQUENT_CHECK; 5199 EV_FREQUENT_CHECK;
3511 5200
3512 { 5201 {
… …
3520 5209
3521 EV_FREQUENT_CHECK; 5210 EV_FREQUENT_CHECK;
3522} 5211}
3523#endif 5212#endif
3524 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
3525#if EV_ASYNC_ENABLE 5255#if EV_ASYNC_ENABLE
3526void 5256void
3527ev_async_start (EV_P_ ev_async *w) 5257ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
3528{ 5258{
3529 if (expect_false (ev_is_active (w))) 5259 if (ecb_expect_false (ev_is_active (w)))
3530 return; 5260 return;
3531 5261
5262 w->sent = 0;
5263
3532 evpipe_init (EV_A); 5264 evpipe_init (EV_A);
3533 5265
3534 EV_FREQUENT_CHECK; 5266 EV_FREQUENT_CHECK;
3535 5267
3536 ev_start (EV_A_ (W)w, ++asynccnt); 5268 ev_start (EV_A_ (W)w, ++asynccnt);
3537 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5269 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
3538 asyncs [asynccnt - 1] = w; 5270 asyncs [asynccnt - 1] = w;
3539 5271
3540 EV_FREQUENT_CHECK; 5272 EV_FREQUENT_CHECK;
3541} 5273}
3542 5274
3543void 5275void
3544ev_async_stop (EV_P_ ev_async *w) 5276ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
3545{ 5277{
3546 clear_pending (EV_A_ (W)w); 5278 clear_pending (EV_A_ (W)w);
3547 if (expect_false (!ev_is_active (w))) 5279 if (ecb_expect_false (!ev_is_active (w)))
3548 return; 5280 return;
3549 5281
3550 EV_FREQUENT_CHECK; 5282 EV_FREQUENT_CHECK;
3551 5283
3552 { 5284 {
… …
3560 5292
3561 EV_FREQUENT_CHECK; 5293 EV_FREQUENT_CHECK;
3562} 5294}
3563 5295
3564void 5296void
3565ev_async_send (EV_P_ ev_async *w) 5297ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3566{ 5298{
3567 w->sent = 1; 5299 w->sent = 1;
3568 evpipe_write (EV_A_ &async_pending); 5300 evpipe_write (EV_A_ &async_pending);
3569} 5301}
3570#endif 5302#endif
… …
3607 5339
3608 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));
3609} 5341}
3610 5342
3611void 5343void
3612ev_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
3613{ 5345{
3614 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));
3615
3616 if (expect_false (!once))
3617 {
3618 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3619 return;
3620 }
3621 5347
3622 once->cb = cb; 5348 once->cb = cb;
3623 once->arg = arg; 5349 once->arg = arg;
3624 5350
3625 ev_init (&once->io, once_cb_io); 5351 ev_init (&once->io, once_cb_io);
… …
3638} 5364}
3639 5365
3640/*****************************************************************************/ 5366/*****************************************************************************/
3641 5367
3642#if EV_WALK_ENABLE 5368#if EV_WALK_ENABLE
5369ecb_cold
3643void 5370void
3644ev_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
3645{ 5372{
3646 int i, j; 5373 int i, j;
3647 ev_watcher_list *wl, *wn; 5374 ev_watcher_list *wl, *wn;
3648 5375
3649 if (types & (EV_IO | EV_EMBED)) 5376 if (types & (EV_IO | EV_EMBED))
… …
3692 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5419 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3693#endif 5420#endif
3694 5421
3695#if EV_IDLE_ENABLE 5422#if EV_IDLE_ENABLE
3696 if (types & EV_IDLE) 5423 if (types & EV_IDLE)
3697 for (j = NUMPRI; i--; ) 5424 for (j = NUMPRI; j--; )
3698 for (i = idlecnt [j]; i--; ) 5425 for (i = idlecnt [j]; i--; )
3699 cb (EV_A_ EV_IDLE, idles [j][i]); 5426 cb (EV_A_ EV_IDLE, idles [j][i]);
3700#endif 5427#endif
3701 5428
3702#if EV_FORK_ENABLE 5429#if EV_FORK_ENABLE
… …
3710 if (types & EV_ASYNC) 5437 if (types & EV_ASYNC)
3711 for (i = asynccnt; i--; ) 5438 for (i = asynccnt; i--; )
3712 cb (EV_A_ EV_ASYNC, asyncs [i]); 5439 cb (EV_A_ EV_ASYNC, asyncs [i]);
3713#endif 5440#endif
3714 5441
5442#if EV_PREPARE_ENABLE
3715 if (types & EV_PREPARE) 5443 if (types & EV_PREPARE)
3716 for (i = preparecnt; i--; ) 5444 for (i = preparecnt; i--; )
3717#if EV_EMBED_ENABLE 5445# if EV_EMBED_ENABLE
3718 if (ev_cb (prepares [i]) != embed_prepare_cb) 5446 if (ev_cb (prepares [i]) != embed_prepare_cb)
3719#endif 5447# endif
3720 cb (EV_A_ EV_PREPARE, prepares [i]); 5448 cb (EV_A_ EV_PREPARE, prepares [i]);
5449#endif
3721 5450
5451#if EV_CHECK_ENABLE
3722 if (types & EV_CHECK) 5452 if (types & EV_CHECK)
3723 for (i = checkcnt; i--; ) 5453 for (i = checkcnt; i--; )
3724 cb (EV_A_ EV_CHECK, checks [i]); 5454 cb (EV_A_ EV_CHECK, checks [i]);
5455#endif
3725 5456
5457#if EV_SIGNAL_ENABLE
3726 if (types & EV_SIGNAL) 5458 if (types & EV_SIGNAL)
3727 for (i = 0; i < EV_NSIG - 1; ++i) 5459 for (i = 0; i < EV_NSIG - 1; ++i)
3728 for (wl = signals [i].head; wl; ) 5460 for (wl = signals [i].head; wl; )
3729 { 5461 {
3730 wn = wl->next; 5462 wn = wl->next;
3731 cb (EV_A_ EV_SIGNAL, wl); 5463 cb (EV_A_ EV_SIGNAL, wl);
3732 wl = wn; 5464 wl = wn;
3733 } 5465 }
5466#endif
3734 5467
5468#if EV_CHILD_ENABLE
3735 if (types & EV_CHILD) 5469 if (types & EV_CHILD)
3736 for (i = EV_PID_HASHSIZE; i--; ) 5470 for (i = (EV_PID_HASHSIZE); i--; )
3737 for (wl = childs [i]; wl; ) 5471 for (wl = childs [i]; wl; )
3738 { 5472 {
3739 wn = wl->next; 5473 wn = wl->next;
3740 cb (EV_A_ EV_CHILD, wl); 5474 cb (EV_A_ EV_CHILD, wl);
3741 wl = wn; 5475 wl = wn;
3742 } 5476 }
5477#endif
3743/* EV_STAT 0x00001000 /* stat data changed */ 5478/* EV_STAT 0x00001000 /* stat data changed */
3744/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5479/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3745} 5480}
3746#endif 5481#endif
3747 5482
3748#if EV_MULTIPLICITY 5483#if EV_MULTIPLICITY
3749 #include "ev_wrap.h" 5484 #include "ev_wrap.h"
3750#endif 5485#endif
3751 5486
3752#ifdef __cplusplus
3753}
3754#endif
3755

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