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Comparing libev/ev.c (file contents):
Revision 1.284 by root, Wed Apr 15 17:49:26 2009 UTC vs.
Revision 1.479 by root, Sun Dec 20 01:31:17 2015 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
46# endif
47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
50# endif 52# endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
62# endif 66# endif
63 67
64# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
… …
75# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
77# endif 81# endif
78# endif 82# endif
79 83
84# if HAVE_NANOSLEEP
80# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
83# else 88# else
89# undef EV_USE_NANOSLEEP
84# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
85# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
86# endif 100# endif
87 101
102# if HAVE_POLL && HAVE_POLL_H
88# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
89# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif 105# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else 106# else
107# undef EV_USE_POLL
100# define EV_USE_POLL 0 108# define EV_USE_POLL 0
101# endif
102# endif 109# endif
103 110
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
107# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# define EV_USE_EPOLL 0
109# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
110# endif 118# endif
111 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
112# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
118# endif 127# endif
119 128
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
123# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
124# define EV_USE_PORT 0
125# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
126# endif 136# endif
127 137
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
131# else
132# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
133# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
134# endif 145# endif
135 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
136# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
137# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
142# endif 163# endif
143 164
144#endif 165#endif
145 166
146#include <math.h>
147#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
148#include <fcntl.h> 169#include <fcntl.h>
149#include <stddef.h> 170#include <stddef.h>
150 171
151#include <stdio.h> 172#include <stdio.h>
152 173
153#include <assert.h> 174#include <assert.h>
154#include <errno.h> 175#include <errno.h>
155#include <sys/types.h> 176#include <sys/types.h>
156#include <time.h> 177#include <time.h>
178#include <limits.h>
157 179
158#include <signal.h> 180#include <signal.h>
159 181
160#ifdef EV_H 182#ifdef EV_H
161# include EV_H 183# include EV_H
162#else 184#else
163# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
164#endif 197#endif
165 198
166#ifndef _WIN32 199#ifndef _WIN32
167# include <sys/time.h> 200# include <sys/time.h>
168# include <sys/wait.h> 201# include <sys/wait.h>
169# include <unistd.h> 202# include <unistd.h>
170#else 203#else
171# include <io.h> 204# include <io.h>
172# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
173# include <windows.h> 207# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
176# endif 210# endif
211# undef EV_AVOID_STDIO
177#endif 212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
178 221
179/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
180 223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
181#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
183# define EV_USE_CLOCK_SYSCALL 1 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
184# else 256# else
185# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
186# endif 258# endif
187#endif 259#endif
188 260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
269
189#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1 272# define EV_USE_MONOTONIC EV_FEATURE_OS
192# else 273# else
193# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
194# endif 275# endif
195#endif 276#endif
196 277
… …
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif 280#endif
200 281
201#ifndef EV_USE_NANOSLEEP 282#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L 283# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1 284# define EV_USE_NANOSLEEP EV_FEATURE_OS
204# else 285# else
205# define EV_USE_NANOSLEEP 0 286# define EV_USE_NANOSLEEP 0
206# endif 287# endif
207#endif 288#endif
208 289
209#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
211#endif 292#endif
212 293
213#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
214# ifdef _WIN32 295# ifdef _WIN32
215# define EV_USE_POLL 0 296# define EV_USE_POLL 0
216# else 297# else
217# define EV_USE_POLL 1 298# define EV_USE_POLL EV_FEATURE_BACKENDS
218# endif 299# endif
219#endif 300#endif
220 301
221#ifndef EV_USE_EPOLL 302#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1 304# define EV_USE_EPOLL EV_FEATURE_BACKENDS
224# else 305# else
225# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
226# endif 307# endif
227#endif 308#endif
228 309
… …
234# define EV_USE_PORT 0 315# define EV_USE_PORT 0
235#endif 316#endif
236 317
237#ifndef EV_USE_INOTIFY 318#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1 320# define EV_USE_INOTIFY EV_FEATURE_OS
240# else 321# else
241# define EV_USE_INOTIFY 0 322# define EV_USE_INOTIFY 0
242# endif 323# endif
243#endif 324#endif
244 325
245#ifndef EV_PID_HASHSIZE 326#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL 327# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif 328#endif
252 329
253#ifndef EV_INOTIFY_HASHSIZE 330#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL 331# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif 332#endif
260 333
261#ifndef EV_USE_EVENTFD 334#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 335# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1 336# define EV_USE_EVENTFD EV_FEATURE_OS
264# else 337# else
265# define EV_USE_EVENTFD 0 338# define EV_USE_EVENTFD 0
339# endif
340#endif
341
342#ifndef EV_USE_SIGNALFD
343# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
344# define EV_USE_SIGNALFD EV_FEATURE_OS
345# else
346# define EV_USE_SIGNALFD 0
266# endif 347# endif
267#endif 348#endif
268 349
269#if 0 /* debugging */ 350#if 0 /* debugging */
270# define EV_VERIFY 3 351# define EV_VERIFY 3
271# define EV_USE_4HEAP 1 352# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1 353# define EV_HEAP_CACHE_AT 1
273#endif 354#endif
274 355
275#ifndef EV_VERIFY 356#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL 357# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
277#endif 358#endif
278 359
279#ifndef EV_USE_4HEAP 360#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL 361# define EV_USE_4HEAP EV_FEATURE_DATA
281#endif 362#endif
282 363
283#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383
384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
385/* which makes programs even slower. might work on other unices, too. */
386#if EV_USE_CLOCK_SYSCALL
387# include <sys/syscall.h>
388# ifdef SYS_clock_gettime
389# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
390# undef EV_USE_MONOTONIC
391# define EV_USE_MONOTONIC 1
392# else
393# undef EV_USE_CLOCK_SYSCALL
394# define EV_USE_CLOCK_SYSCALL 0
395# endif
285#endif 396#endif
286 397
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288 399
289#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
… …
300# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
302#endif 413#endif
303 414
304#if !EV_USE_NANOSLEEP 415#if !EV_USE_NANOSLEEP
305# ifndef _WIN32 416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
306# include <sys/select.h> 418# include <sys/select.h>
307# endif 419# endif
308#endif 420#endif
309 421
310#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h> 423# include <sys/statfs.h>
313# include <sys/inotify.h> 424# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW 426# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY 427# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0 428# define EV_USE_INOTIFY 0
318# endif 429# endif
319#endif 430#endif
320 431
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD 432#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h> 434# include <stdint.h>
337# ifdef __cplusplus 435# ifndef EFD_NONBLOCK
338extern "C" { 436# define EFD_NONBLOCK O_NONBLOCK
339# endif 437# endif
340int eventfd (unsigned int initval, int flags); 438# ifndef EFD_CLOEXEC
341# ifdef __cplusplus 439# ifdef O_CLOEXEC
342} 440# define EFD_CLOEXEC O_CLOEXEC
441# else
442# define EFD_CLOEXEC 02000000
443# endif
343# endif 444# endif
445EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
446#endif
447
448#if EV_USE_SIGNALFD
449/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
450# include <stdint.h>
451# ifndef SFD_NONBLOCK
452# define SFD_NONBLOCK O_NONBLOCK
453# endif
454# ifndef SFD_CLOEXEC
455# ifdef O_CLOEXEC
456# define SFD_CLOEXEC O_CLOEXEC
457# else
458# define SFD_CLOEXEC 02000000
459# endif
460# endif
461EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
462
463struct signalfd_siginfo
464{
465 uint32_t ssi_signo;
466 char pad[128 - sizeof (uint32_t)];
467};
344#endif 468#endif
345 469
346/**/ 470/**/
347 471
348#if EV_VERIFY >= 3 472#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 473# define EV_FREQUENT_CHECK ev_verify (EV_A)
350#else 474#else
351# define EV_FREQUENT_CHECK do { } while (0) 475# define EV_FREQUENT_CHECK do { } while (0)
352#endif 476#endif
353 477
354/* 478/*
355 * This is used to avoid floating point rounding problems. 479 * This is used to work around floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000. 480 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */ 481 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
363 484
364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 485#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367 487
488#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
489#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
490
491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
492/* ECB.H BEGIN */
493/*
494 * libecb - http://software.schmorp.de/pkg/libecb
495 *
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
499 *
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
502 *
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
505 *
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
509 *
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
531 */
532
533#ifndef ECB_H
534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010005
538
539#ifdef _WIN32
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
368#if __GNUC__ >= 4 546 #if __GNUC__
547 typedef signed long long int64_t;
548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
562#else
563 #include <inttypes.h>
564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
565 #define ECB_PTRSIZE 8
566 #else
567 #define ECB_PTRSIZE 4
568 #endif
569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
580 #endif
581#endif
582
583/* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
586 * or so.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
589 */
590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
592#else
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
610#define ECB_CPP (__cplusplus+0)
611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
633
634/*****************************************************************************/
635
636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
638
639#if ECB_NO_THREADS
640 #define ECB_NO_SMP 1
641#endif
642
643#if ECB_NO_SMP
644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#if 1400 <= _MSC_VER
653 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
654#endif
655
656#ifndef ECB_MEMORY_FENCE
657 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
658 #if __i386 || __i386__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif ECB_GCC_AMD64
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
667 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
668 #elif defined __ARM_ARCH_2__ \
669 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
670 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
671 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
672 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
673 || defined __ARM_ARCH_5TEJ__
674 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
678 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
682 #elif __aarch64__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
688 #elif defined __s390__ || defined __s390x__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
690 #elif defined __mips__
691 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
692 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
694 #elif defined __alpha__
695 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
696 #elif defined __hppa__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
698 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
699 #elif defined __ia64__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
701 #elif defined __m68k__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #elif defined __m88k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
705 #elif defined __sh__
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
707 #endif
708 #endif
709#endif
710
711#ifndef ECB_MEMORY_FENCE
712 #if ECB_GCC_VERSION(4,7)
713 /* see comment below (stdatomic.h) about the C11 memory model. */
714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
717
718 #elif ECB_CLANG_EXTENSION(c_atomic)
719 /* see comment below (stdatomic.h) about the C11 memory model. */
720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
723
724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
725 #define ECB_MEMORY_FENCE __sync_synchronize ()
726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
728 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
729 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
730 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
731 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
732 #elif _MSC_VER >= 1400 /* VC++ 2005 */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
737 #elif defined _WIN32
738 #include <WinNT.h>
739 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
740 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
741 #include <mbarrier.h>
742 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
743 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
744 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
745 #elif __xlC__
746 #define ECB_MEMORY_FENCE __sync ()
747 #endif
748#endif
749
750#ifndef ECB_MEMORY_FENCE
751 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
752 /* we assume that these memory fences work on all variables/all memory accesses, */
753 /* not just C11 atomics and atomic accesses */
754 #include <stdatomic.h>
755 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
756 /* any fence other than seq_cst, which isn't very efficient for us. */
757 /* Why that is, we don't know - either the C11 memory model is quite useless */
758 /* for most usages, or gcc and clang have a bug */
759 /* I *currently* lean towards the latter, and inefficiently implement */
760 /* all three of ecb's fences as a seq_cst fence */
761 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
762 /* for all __atomic_thread_fence's except seq_cst */
763 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
764 #endif
765#endif
766
767#ifndef ECB_MEMORY_FENCE
768 #if !ECB_AVOID_PTHREADS
769 /*
770 * if you get undefined symbol references to pthread_mutex_lock,
771 * or failure to find pthread.h, then you should implement
772 * the ECB_MEMORY_FENCE operations for your cpu/compiler
773 * OR provide pthread.h and link against the posix thread library
774 * of your system.
775 */
776 #include <pthread.h>
777 #define ECB_NEEDS_PTHREADS 1
778 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
779
780 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
781 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
782 #endif
783#endif
784
785#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
786 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
787#endif
788
789#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
791#endif
792
793/*****************************************************************************/
794
795#if ECB_CPP
796 #define ecb_inline static inline
797#elif ECB_GCC_VERSION(2,5)
798 #define ecb_inline static __inline__
799#elif ECB_C99
800 #define ecb_inline static inline
801#else
802 #define ecb_inline static
803#endif
804
805#if ECB_GCC_VERSION(3,3)
806 #define ecb_restrict __restrict__
807#elif ECB_C99
808 #define ecb_restrict restrict
809#else
810 #define ecb_restrict
811#endif
812
813typedef int ecb_bool;
814
815#define ECB_CONCAT_(a, b) a ## b
816#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
817#define ECB_STRINGIFY_(a) # a
818#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
819#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
820
821#define ecb_function_ ecb_inline
822
823#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
824 #define ecb_attribute(attrlist) __attribute__ (attrlist)
825#else
826 #define ecb_attribute(attrlist)
827#endif
828
829#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
831#else
832 /* possible C11 impl for integral types
833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
835
836 #define ecb_is_constant(expr) 0
837#endif
838
839#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
369# define expect(expr,value) __builtin_expect ((expr),(value)) 840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else 841#else
372# define expect(expr,value) (expr) 842 #define ecb_expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif 843#endif
377#endif
378 844
845#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
847#else
848 #define ecb_prefetch(addr,rw,locality)
849#endif
850
851/* no emulation for ecb_decltype */
852#if ECB_CPP11
853 // older implementations might have problems with decltype(x)::type, work around it
854 template<class T> struct ecb_decltype_t { typedef T type; };
855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
856#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
857 #define ecb_decltype(x) __typeof__ (x)
858#endif
859
860#if _MSC_VER >= 1300
861 #define ecb_deprecated __declspec (deprecated)
862#else
863 #define ecb_deprecated ecb_attribute ((__deprecated__))
864#endif
865
866#if _MSC_VER >= 1500
867 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
868#elif ECB_GCC_VERSION(4,5)
869 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
870#else
871 #define ecb_deprecated_message(msg) ecb_deprecated
872#endif
873
874#if _MSC_VER >= 1400
875 #define ecb_noinline __declspec (noinline)
876#else
877 #define ecb_noinline ecb_attribute ((__noinline__))
878#endif
879
880#define ecb_unused ecb_attribute ((__unused__))
881#define ecb_const ecb_attribute ((__const__))
882#define ecb_pure ecb_attribute ((__pure__))
883
884#if ECB_C11 || __IBMC_NORETURN
885 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
886 #define ecb_noreturn _Noreturn
887#elif ECB_CPP11
888 #define ecb_noreturn [[noreturn]]
889#elif _MSC_VER >= 1200
890 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
891 #define ecb_noreturn __declspec (noreturn)
892#else
893 #define ecb_noreturn ecb_attribute ((__noreturn__))
894#endif
895
896#if ECB_GCC_VERSION(4,3)
897 #define ecb_artificial ecb_attribute ((__artificial__))
898 #define ecb_hot ecb_attribute ((__hot__))
899 #define ecb_cold ecb_attribute ((__cold__))
900#else
901 #define ecb_artificial
902 #define ecb_hot
903 #define ecb_cold
904#endif
905
906/* put around conditional expressions if you are very sure that the */
907/* expression is mostly true or mostly false. note that these return */
908/* booleans, not the expression. */
379#define expect_false(expr) expect ((expr) != 0, 0) 909#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
380#define expect_true(expr) expect ((expr) != 0, 1) 910#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
911/* for compatibility to the rest of the world */
912#define ecb_likely(expr) ecb_expect_true (expr)
913#define ecb_unlikely(expr) ecb_expect_false (expr)
914
915/* count trailing zero bits and count # of one bits */
916#if ECB_GCC_VERSION(3,4) \
917 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
918 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
919 && ECB_CLANG_BUILTIN(__builtin_popcount))
920 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
923 #define ecb_ctz32(x) __builtin_ctz (x)
924 #define ecb_ctz64(x) __builtin_ctzll (x)
925 #define ecb_popcount32(x) __builtin_popcount (x)
926 /* no popcountll */
927#else
928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
929 ecb_function_ ecb_const int
930 ecb_ctz32 (uint32_t x)
931 {
932#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
933 unsigned long r;
934 _BitScanForward (&r, x);
935 return (int)r;
936#else
937 int r = 0;
938
939 x &= ~x + 1; /* this isolates the lowest bit */
940
941#if ECB_branchless_on_i386
942 r += !!(x & 0xaaaaaaaa) << 0;
943 r += !!(x & 0xcccccccc) << 1;
944 r += !!(x & 0xf0f0f0f0) << 2;
945 r += !!(x & 0xff00ff00) << 3;
946 r += !!(x & 0xffff0000) << 4;
947#else
948 if (x & 0xaaaaaaaa) r += 1;
949 if (x & 0xcccccccc) r += 2;
950 if (x & 0xf0f0f0f0) r += 4;
951 if (x & 0xff00ff00) r += 8;
952 if (x & 0xffff0000) r += 16;
953#endif
954
955 return r;
956#endif
957 }
958
959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
960 ecb_function_ ecb_const int
961 ecb_ctz64 (uint64_t x)
962 {
963#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
964 unsigned long r;
965 _BitScanForward64 (&r, x);
966 return (int)r;
967#else
968 int shift = x & 0xffffffff ? 0 : 32;
969 return ecb_ctz32 (x >> shift) + shift;
970#endif
971 }
972
973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
974 ecb_function_ ecb_const int
975 ecb_popcount32 (uint32_t x)
976 {
977 x -= (x >> 1) & 0x55555555;
978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
979 x = ((x >> 4) + x) & 0x0f0f0f0f;
980 x *= 0x01010101;
981
982 return x >> 24;
983 }
984
985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
987 {
988#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
989 unsigned long r;
990 _BitScanReverse (&r, x);
991 return (int)r;
992#else
993 int r = 0;
994
995 if (x >> 16) { x >>= 16; r += 16; }
996 if (x >> 8) { x >>= 8; r += 8; }
997 if (x >> 4) { x >>= 4; r += 4; }
998 if (x >> 2) { x >>= 2; r += 2; }
999 if (x >> 1) { r += 1; }
1000
1001 return r;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1007 {
1008#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1009 unsigned long r;
1010 _BitScanReverse64 (&r, x);
1011 return (int)r;
1012#else
1013 int r = 0;
1014
1015 if (x >> 32) { x >>= 32; r += 32; }
1016
1017 return r + ecb_ld32 (x);
1018#endif
1019 }
1020#endif
1021
1022ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1023ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1024ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1025ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1026
1027ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1028ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1029{
1030 return ( (x * 0x0802U & 0x22110U)
1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1032}
1033
1034ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1035ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1036{
1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1040 x = ( x >> 8 ) | ( x << 8);
1041
1042 return x;
1043}
1044
1045ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1046ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1047{
1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1052 x = ( x >> 16 ) | ( x << 16);
1053
1054 return x;
1055}
1056
1057/* popcount64 is only available on 64 bit cpus as gcc builtin */
1058/* so for this version we are lazy */
1059ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1060ecb_function_ ecb_const int
1061ecb_popcount64 (uint64_t x)
1062{
1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1064}
1065
1066ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1067ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1068ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1069ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1070ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1071ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1072ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1073ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1074
1075ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1076ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1077ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1078ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1079ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1080ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1081ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1082ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1083
1084#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1085 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1086 #define ecb_bswap16(x) __builtin_bswap16 (x)
1087 #else
1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1089 #endif
1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
1091 #define ecb_bswap64(x) __builtin_bswap64 (x)
1092#elif _MSC_VER
1093 #include <stdlib.h>
1094 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1095 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1096 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1097#else
1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1099 ecb_function_ ecb_const uint16_t
1100 ecb_bswap16 (uint16_t x)
1101 {
1102 return ecb_rotl16 (x, 8);
1103 }
1104
1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1106 ecb_function_ ecb_const uint32_t
1107 ecb_bswap32 (uint32_t x)
1108 {
1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1110 }
1111
1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1113 ecb_function_ ecb_const uint64_t
1114 ecb_bswap64 (uint64_t x)
1115 {
1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1117 }
1118#endif
1119
1120#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1121 #define ecb_unreachable() __builtin_unreachable ()
1122#else
1123 /* this seems to work fine, but gcc always emits a warning for it :/ */
1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1126#endif
1127
1128/* try to tell the compiler that some condition is definitely true */
1129#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1130
1131ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1132ecb_inline ecb_const uint32_t
1133ecb_byteorder_helper (void)
1134{
1135 /* the union code still generates code under pressure in gcc, */
1136 /* but less than using pointers, and always seems to */
1137 /* successfully return a constant. */
1138 /* the reason why we have this horrible preprocessor mess */
1139 /* is to avoid it in all cases, at least on common architectures */
1140 /* or when using a recent enough gcc version (>= 4.6) */
1141#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1142 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1143 #define ECB_LITTLE_ENDIAN 1
1144 return 0x44332211;
1145#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1148 return 0x11223344;
1149#else
1150 union
1151 {
1152 uint8_t c[4];
1153 uint32_t u;
1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1155 return u.u;
1156#endif
1157}
1158
1159ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1160ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1161ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1162ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1163
1164#if ECB_GCC_VERSION(3,0) || ECB_C99
1165 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1166#else
1167 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1168#endif
1169
1170#if ECB_CPP
1171 template<typename T>
1172 static inline T ecb_div_rd (T val, T div)
1173 {
1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1175 }
1176 template<typename T>
1177 static inline T ecb_div_ru (T val, T div)
1178 {
1179 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1180 }
1181#else
1182 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1183 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1184#endif
1185
1186#if ecb_cplusplus_does_not_suck
1187 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1188 template<typename T, int N>
1189 static inline int ecb_array_length (const T (&arr)[N])
1190 {
1191 return N;
1192 }
1193#else
1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1195#endif
1196
1197ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1198ecb_function_ ecb_const uint32_t
1199ecb_binary16_to_binary32 (uint32_t x)
1200{
1201 unsigned int s = (x & 0x8000) << (31 - 15);
1202 int e = (x >> 10) & 0x001f;
1203 unsigned int m = x & 0x03ff;
1204
1205 if (ecb_expect_false (e == 31))
1206 /* infinity or NaN */
1207 e = 255 - (127 - 15);
1208 else if (ecb_expect_false (!e))
1209 {
1210 if (ecb_expect_true (!m))
1211 /* zero, handled by code below by forcing e to 0 */
1212 e = 0 - (127 - 15);
1213 else
1214 {
1215 /* subnormal, renormalise */
1216 unsigned int s = 10 - ecb_ld32 (m);
1217
1218 m = (m << s) & 0x3ff; /* mask implicit bit */
1219 e -= s - 1;
1220 }
1221 }
1222
1223 /* e and m now are normalised, or zero, (or inf or nan) */
1224 e += 127 - 15;
1225
1226 return s | (e << 23) | (m << (23 - 10));
1227}
1228
1229ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1230ecb_function_ ecb_const uint16_t
1231ecb_binary32_to_binary16 (uint32_t x)
1232{
1233 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1234 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1235 unsigned int m = x & 0x007fffff;
1236
1237 x &= 0x7fffffff;
1238
1239 /* if it's within range of binary16 normals, use fast path */
1240 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1241 {
1242 /* mantissa round-to-even */
1243 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1244
1245 /* handle overflow */
1246 if (ecb_expect_false (m >= 0x00800000))
1247 {
1248 m >>= 1;
1249 e += 1;
1250 }
1251
1252 return s | (e << 10) | (m >> (23 - 10));
1253 }
1254
1255 /* handle large numbers and infinity */
1256 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1257 return s | 0x7c00;
1258
1259 /* handle zero, subnormals and small numbers */
1260 if (ecb_expect_true (x < 0x38800000))
1261 {
1262 /* zero */
1263 if (ecb_expect_true (!x))
1264 return s;
1265
1266 /* handle subnormals */
1267
1268 /* too small, will be zero */
1269 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1270 return s;
1271
1272 m |= 0x00800000; /* make implicit bit explicit */
1273
1274 /* very tricky - we need to round to the nearest e (+10) bit value */
1275 {
1276 unsigned int bits = 14 - e;
1277 unsigned int half = (1 << (bits - 1)) - 1;
1278 unsigned int even = (m >> bits) & 1;
1279
1280 /* if this overflows, we will end up with a normalised number */
1281 m = (m + half + even) >> bits;
1282 }
1283
1284 return s | m;
1285 }
1286
1287 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1288 m >>= 13;
1289
1290 return s | 0x7c00 | m | !m;
1291}
1292
1293/*******************************************************************************/
1294/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1295
1296/* basically, everything uses "ieee pure-endian" floating point numbers */
1297/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1298#if 0 \
1299 || __i386 || __i386__ \
1300 || ECB_GCC_AMD64 \
1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1302 || defined __s390__ || defined __s390x__ \
1303 || defined __mips__ \
1304 || defined __alpha__ \
1305 || defined __hppa__ \
1306 || defined __ia64__ \
1307 || defined __m68k__ \
1308 || defined __m88k__ \
1309 || defined __sh__ \
1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1312 || defined __aarch64__
1313 #define ECB_STDFP 1
1314 #include <string.h> /* for memcpy */
1315#else
1316 #define ECB_STDFP 0
1317#endif
1318
1319#ifndef ECB_NO_LIBM
1320
1321 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1322
1323 /* only the oldest of old doesn't have this one. solaris. */
1324 #ifdef INFINITY
1325 #define ECB_INFINITY INFINITY
1326 #else
1327 #define ECB_INFINITY HUGE_VAL
1328 #endif
1329
1330 #ifdef NAN
1331 #define ECB_NAN NAN
1332 #else
1333 #define ECB_NAN ECB_INFINITY
1334 #endif
1335
1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1339 #else
1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1342 #endif
1343
1344 /* convert a float to ieee single/binary32 */
1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1346 ecb_function_ ecb_const uint32_t
1347 ecb_float_to_binary32 (float x)
1348 {
1349 uint32_t r;
1350
1351 #if ECB_STDFP
1352 memcpy (&r, &x, 4);
1353 #else
1354 /* slow emulation, works for anything but -0 */
1355 uint32_t m;
1356 int e;
1357
1358 if (x == 0e0f ) return 0x00000000U;
1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1361 if (x != x ) return 0x7fbfffffU;
1362
1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1364
1365 r = m & 0x80000000U;
1366
1367 if (r)
1368 m = -m;
1369
1370 if (e <= -126)
1371 {
1372 m &= 0xffffffU;
1373 m >>= (-125 - e);
1374 e = -126;
1375 }
1376
1377 r |= (e + 126) << 23;
1378 r |= m & 0x7fffffU;
1379 #endif
1380
1381 return r;
1382 }
1383
1384 /* converts an ieee single/binary32 to a float */
1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1386 ecb_function_ ecb_const float
1387 ecb_binary32_to_float (uint32_t x)
1388 {
1389 float r;
1390
1391 #if ECB_STDFP
1392 memcpy (&r, &x, 4);
1393 #else
1394 /* emulation, only works for normals and subnormals and +0 */
1395 int neg = x >> 31;
1396 int e = (x >> 23) & 0xffU;
1397
1398 x &= 0x7fffffU;
1399
1400 if (e)
1401 x |= 0x800000U;
1402 else
1403 e = 1;
1404
1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1407
1408 r = neg ? -r : r;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* convert a double to ieee double/binary64 */
1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1416 ecb_function_ ecb_const uint64_t
1417 ecb_double_to_binary64 (double x)
1418 {
1419 uint64_t r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 8);
1423 #else
1424 /* slow emulation, works for anything but -0 */
1425 uint64_t m;
1426 int e;
1427
1428 if (x == 0e0 ) return 0x0000000000000000U;
1429 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1430 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1431 if (x != x ) return 0X7ff7ffffffffffffU;
1432
1433 m = frexp (x, &e) * 0x20000000000000U;
1434
1435 r = m & 0x8000000000000000;;
1436
1437 if (r)
1438 m = -m;
1439
1440 if (e <= -1022)
1441 {
1442 m &= 0x1fffffffffffffU;
1443 m >>= (-1021 - e);
1444 e = -1022;
1445 }
1446
1447 r |= ((uint64_t)(e + 1022)) << 52;
1448 r |= m & 0xfffffffffffffU;
1449 #endif
1450
1451 return r;
1452 }
1453
1454 /* converts an ieee double/binary64 to a double */
1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1456 ecb_function_ ecb_const double
1457 ecb_binary64_to_double (uint64_t x)
1458 {
1459 double r;
1460
1461 #if ECB_STDFP
1462 memcpy (&r, &x, 8);
1463 #else
1464 /* emulation, only works for normals and subnormals and +0 */
1465 int neg = x >> 63;
1466 int e = (x >> 52) & 0x7ffU;
1467
1468 x &= 0xfffffffffffffU;
1469
1470 if (e)
1471 x |= 0x10000000000000U;
1472 else
1473 e = 1;
1474
1475 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1476 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1477
1478 r = neg ? -r : r;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* convert a float to ieee half/binary16 */
1485 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1486 ecb_function_ ecb_const uint16_t
1487 ecb_float_to_binary16 (float x)
1488 {
1489 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1490 }
1491
1492 /* convert an ieee half/binary16 to float */
1493 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1494 ecb_function_ ecb_const float
1495 ecb_binary16_to_float (uint16_t x)
1496 {
1497 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1498 }
1499
1500#endif
1501
1502#endif
1503
1504/* ECB.H END */
1505
1506#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1507/* if your architecture doesn't need memory fences, e.g. because it is
1508 * single-cpu/core, or if you use libev in a project that doesn't use libev
1509 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1510 * libev, in which cases the memory fences become nops.
1511 * alternatively, you can remove this #error and link against libpthread,
1512 * which will then provide the memory fences.
1513 */
1514# error "memory fences not defined for your architecture, please report"
1515#endif
1516
1517#ifndef ECB_MEMORY_FENCE
1518# define ECB_MEMORY_FENCE do { } while (0)
1519# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1520# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1521#endif
1522
1523#define expect_false(cond) ecb_expect_false (cond)
1524#define expect_true(cond) ecb_expect_true (cond)
1525#define noinline ecb_noinline
1526
381#define inline_size static inline 1527#define inline_size ecb_inline
382 1528
383#if EV_MINIMAL 1529#if EV_FEATURE_CODE
1530# define inline_speed ecb_inline
1531#else
384# define inline_speed static noinline 1532# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif 1533#endif
388 1534
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1535#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1536
1537#if EV_MINPRI == EV_MAXPRI
1538# define ABSPRI(w) (((W)w), 0)
1539#else
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1540# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1541#endif
391 1542
392#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1543#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */ 1544#define EMPTY2(a,b) /* used to suppress some warnings */
394 1545
395typedef ev_watcher *W; 1546typedef ev_watcher *W;
… …
399#define ev_active(w) ((W)(w))->active 1550#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at 1551#define ev_at(w) ((WT)(w))->at
401 1552
402#if EV_USE_REALTIME 1553#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1554/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */ 1555/* giving it a reasonably high chance of working on typical architectures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1556static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif 1557#endif
407 1558
408#if EV_USE_MONOTONIC 1559#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1560static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif 1561#endif
411 1562
1563#ifndef EV_FD_TO_WIN32_HANDLE
1564# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1565#endif
1566#ifndef EV_WIN32_HANDLE_TO_FD
1567# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1568#endif
1569#ifndef EV_WIN32_CLOSE_FD
1570# define EV_WIN32_CLOSE_FD(fd) close (fd)
1571#endif
1572
412#ifdef _WIN32 1573#ifdef _WIN32
413# include "ev_win32.c" 1574# include "ev_win32.c"
414#endif 1575#endif
415 1576
416/*****************************************************************************/ 1577/*****************************************************************************/
417 1578
1579/* define a suitable floor function (only used by periodics atm) */
1580
1581#if EV_USE_FLOOR
1582# include <math.h>
1583# define ev_floor(v) floor (v)
1584#else
1585
1586#include <float.h>
1587
1588/* a floor() replacement function, should be independent of ev_tstamp type */
1589static ev_tstamp noinline
1590ev_floor (ev_tstamp v)
1591{
1592 /* the choice of shift factor is not terribly important */
1593#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1594 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1595#else
1596 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1597#endif
1598
1599 /* argument too large for an unsigned long? */
1600 if (expect_false (v >= shift))
1601 {
1602 ev_tstamp f;
1603
1604 if (v == v - 1.)
1605 return v; /* very large number */
1606
1607 f = shift * ev_floor (v * (1. / shift));
1608 return f + ev_floor (v - f);
1609 }
1610
1611 /* special treatment for negative args? */
1612 if (expect_false (v < 0.))
1613 {
1614 ev_tstamp f = -ev_floor (-v);
1615
1616 return f - (f == v ? 0 : 1);
1617 }
1618
1619 /* fits into an unsigned long */
1620 return (unsigned long)v;
1621}
1622
1623#endif
1624
1625/*****************************************************************************/
1626
1627#ifdef __linux
1628# include <sys/utsname.h>
1629#endif
1630
1631static unsigned int noinline ecb_cold
1632ev_linux_version (void)
1633{
1634#ifdef __linux
1635 unsigned int v = 0;
1636 struct utsname buf;
1637 int i;
1638 char *p = buf.release;
1639
1640 if (uname (&buf))
1641 return 0;
1642
1643 for (i = 3+1; --i; )
1644 {
1645 unsigned int c = 0;
1646
1647 for (;;)
1648 {
1649 if (*p >= '0' && *p <= '9')
1650 c = c * 10 + *p++ - '0';
1651 else
1652 {
1653 p += *p == '.';
1654 break;
1655 }
1656 }
1657
1658 v = (v << 8) | c;
1659 }
1660
1661 return v;
1662#else
1663 return 0;
1664#endif
1665}
1666
1667/*****************************************************************************/
1668
1669#if EV_AVOID_STDIO
1670static void noinline ecb_cold
1671ev_printerr (const char *msg)
1672{
1673 write (STDERR_FILENO, msg, strlen (msg));
1674}
1675#endif
1676
418static void (*syserr_cb)(const char *msg); 1677static void (*syserr_cb)(const char *msg) EV_THROW;
419 1678
420void 1679void ecb_cold
421ev_set_syserr_cb (void (*cb)(const char *msg)) 1680ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
422{ 1681{
423 syserr_cb = cb; 1682 syserr_cb = cb;
424} 1683}
425 1684
426static void noinline 1685static void noinline ecb_cold
427ev_syserr (const char *msg) 1686ev_syserr (const char *msg)
428{ 1687{
429 if (!msg) 1688 if (!msg)
430 msg = "(libev) system error"; 1689 msg = "(libev) system error";
431 1690
432 if (syserr_cb) 1691 if (syserr_cb)
433 syserr_cb (msg); 1692 syserr_cb (msg);
434 else 1693 else
435 { 1694 {
1695#if EV_AVOID_STDIO
1696 ev_printerr (msg);
1697 ev_printerr (": ");
1698 ev_printerr (strerror (errno));
1699 ev_printerr ("\n");
1700#else
436 perror (msg); 1701 perror (msg);
1702#endif
437 abort (); 1703 abort ();
438 } 1704 }
439} 1705}
440 1706
441static void * 1707static void *
442ev_realloc_emul (void *ptr, long size) 1708ev_realloc_emul (void *ptr, long size) EV_THROW
443{ 1709{
444 /* some systems, notably openbsd and darwin, fail to properly 1710 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and 1711 * implement realloc (x, 0) (as required by both ansi c-89 and
446 * the single unix specification, so work around them here. 1712 * the single unix specification, so work around them here.
1713 * recently, also (at least) fedora and debian started breaking it,
1714 * despite documenting it otherwise.
447 */ 1715 */
448 1716
449 if (size) 1717 if (size)
450 return realloc (ptr, size); 1718 return realloc (ptr, size);
451 1719
452 free (ptr); 1720 free (ptr);
453 return 0; 1721 return 0;
454} 1722}
455 1723
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1724static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
457 1725
458void 1726void ecb_cold
459ev_set_allocator (void *(*cb)(void *ptr, long size)) 1727ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
460{ 1728{
461 alloc = cb; 1729 alloc = cb;
462} 1730}
463 1731
464inline_speed void * 1732inline_speed void *
… …
466{ 1734{
467 ptr = alloc (ptr, size); 1735 ptr = alloc (ptr, size);
468 1736
469 if (!ptr && size) 1737 if (!ptr && size)
470 { 1738 {
1739#if EV_AVOID_STDIO
1740 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1741#else
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1742 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1743#endif
472 abort (); 1744 abort ();
473 } 1745 }
474 1746
475 return ptr; 1747 return ptr;
476} 1748}
… …
478#define ev_malloc(size) ev_realloc (0, (size)) 1750#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0) 1751#define ev_free(ptr) ev_realloc ((ptr), 0)
480 1752
481/*****************************************************************************/ 1753/*****************************************************************************/
482 1754
1755/* set in reify when reification needed */
1756#define EV_ANFD_REIFY 1
1757
1758/* file descriptor info structure */
483typedef struct 1759typedef struct
484{ 1760{
485 WL head; 1761 WL head;
486 unsigned char events; 1762 unsigned char events; /* the events watched for */
487 unsigned char reify; 1763 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1764 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused; 1765 unsigned char unused;
490#if EV_USE_EPOLL 1766#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */ 1767 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif 1768#endif
493#if EV_SELECT_IS_WINSOCKET 1769#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
494 SOCKET handle; 1770 SOCKET handle;
495#endif 1771#endif
1772#if EV_USE_IOCP
1773 OVERLAPPED or, ow;
1774#endif
496} ANFD; 1775} ANFD;
497 1776
1777/* stores the pending event set for a given watcher */
498typedef struct 1778typedef struct
499{ 1779{
500 W w; 1780 W w;
501 int events; 1781 int events; /* the pending event set for the given watcher */
502} ANPENDING; 1782} ANPENDING;
503 1783
504#if EV_USE_INOTIFY 1784#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */ 1785/* hash table entry per inotify-id */
506typedef struct 1786typedef struct
… …
509} ANFS; 1789} ANFS;
510#endif 1790#endif
511 1791
512/* Heap Entry */ 1792/* Heap Entry */
513#if EV_HEAP_CACHE_AT 1793#if EV_HEAP_CACHE_AT
1794 /* a heap element */
514 typedef struct { 1795 typedef struct {
515 ev_tstamp at; 1796 ev_tstamp at;
516 WT w; 1797 WT w;
517 } ANHE; 1798 } ANHE;
518 1799
519 #define ANHE_w(he) (he).w /* access watcher, read-write */ 1800 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */ 1801 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 1802 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else 1803#else
1804 /* a heap element */
523 typedef WT ANHE; 1805 typedef WT ANHE;
524 1806
525 #define ANHE_w(he) (he) 1807 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at 1808 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he) 1809 #define ANHE_at_cache(he)
… …
538 #undef VAR 1820 #undef VAR
539 }; 1821 };
540 #include "ev_wrap.h" 1822 #include "ev_wrap.h"
541 1823
542 static struct ev_loop default_loop_struct; 1824 static struct ev_loop default_loop_struct;
543 struct ev_loop *ev_default_loop_ptr; 1825 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
544 1826
545#else 1827#else
546 1828
547 ev_tstamp ev_rt_now; 1829 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
548 #define VAR(name,decl) static decl; 1830 #define VAR(name,decl) static decl;
549 #include "ev_vars.h" 1831 #include "ev_vars.h"
550 #undef VAR 1832 #undef VAR
551 1833
552 static int ev_default_loop_ptr; 1834 static int ev_default_loop_ptr;
553 1835
554#endif 1836#endif
555 1837
1838#if EV_FEATURE_API
1839# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1840# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1841# define EV_INVOKE_PENDING invoke_cb (EV_A)
1842#else
1843# define EV_RELEASE_CB (void)0
1844# define EV_ACQUIRE_CB (void)0
1845# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1846#endif
1847
1848#define EVBREAK_RECURSE 0x80
1849
556/*****************************************************************************/ 1850/*****************************************************************************/
557 1851
1852#ifndef EV_HAVE_EV_TIME
558ev_tstamp 1853ev_tstamp
559ev_time (void) 1854ev_time (void) EV_THROW
560{ 1855{
561#if EV_USE_REALTIME 1856#if EV_USE_REALTIME
562 if (expect_true (have_realtime)) 1857 if (expect_true (have_realtime))
563 { 1858 {
564 struct timespec ts; 1859 struct timespec ts;
… …
569 1864
570 struct timeval tv; 1865 struct timeval tv;
571 gettimeofday (&tv, 0); 1866 gettimeofday (&tv, 0);
572 return tv.tv_sec + tv.tv_usec * 1e-6; 1867 return tv.tv_sec + tv.tv_usec * 1e-6;
573} 1868}
1869#endif
574 1870
575inline_size ev_tstamp 1871inline_size ev_tstamp
576get_clock (void) 1872get_clock (void)
577{ 1873{
578#if EV_USE_MONOTONIC 1874#if EV_USE_MONOTONIC
… …
587 return ev_time (); 1883 return ev_time ();
588} 1884}
589 1885
590#if EV_MULTIPLICITY 1886#if EV_MULTIPLICITY
591ev_tstamp 1887ev_tstamp
592ev_now (EV_P) 1888ev_now (EV_P) EV_THROW
593{ 1889{
594 return ev_rt_now; 1890 return ev_rt_now;
595} 1891}
596#endif 1892#endif
597 1893
598void 1894void
599ev_sleep (ev_tstamp delay) 1895ev_sleep (ev_tstamp delay) EV_THROW
600{ 1896{
601 if (delay > 0.) 1897 if (delay > 0.)
602 { 1898 {
603#if EV_USE_NANOSLEEP 1899#if EV_USE_NANOSLEEP
604 struct timespec ts; 1900 struct timespec ts;
605 1901
606 ts.tv_sec = (time_t)delay; 1902 EV_TS_SET (ts, delay);
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0); 1903 nanosleep (&ts, 0);
610#elif defined(_WIN32) 1904#elif defined _WIN32
611 Sleep ((unsigned long)(delay * 1e3)); 1905 Sleep ((unsigned long)(delay * 1e3));
612#else 1906#else
613 struct timeval tv; 1907 struct timeval tv;
614 1908
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1909 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 1910 /* something not guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */ 1911 /* by older ones */
1912 EV_TV_SET (tv, delay);
621 select (0, 0, 0, 0, &tv); 1913 select (0, 0, 0, 0, &tv);
622#endif 1914#endif
623 } 1915 }
624} 1916}
625 1917
626/*****************************************************************************/ 1918/*****************************************************************************/
627 1919
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1920#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629 1921
1922/* find a suitable new size for the given array, */
1923/* hopefully by rounding to a nice-to-malloc size */
630inline_size int 1924inline_size int
631array_nextsize (int elem, int cur, int cnt) 1925array_nextsize (int elem, int cur, int cnt)
632{ 1926{
633 int ncur = cur + 1; 1927 int ncur = cur + 1;
634 1928
635 do 1929 do
636 ncur <<= 1; 1930 ncur <<= 1;
637 while (cnt > ncur); 1931 while (cnt > ncur);
638 1932
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1933 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1934 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 { 1935 {
642 ncur *= elem; 1936 ncur *= elem;
643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1937 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 ncur = ncur - sizeof (void *) * 4; 1938 ncur = ncur - sizeof (void *) * 4;
… …
646 } 1940 }
647 1941
648 return ncur; 1942 return ncur;
649} 1943}
650 1944
651static noinline void * 1945static void * noinline ecb_cold
652array_realloc (int elem, void *base, int *cur, int cnt) 1946array_realloc (int elem, void *base, int *cur, int cnt)
653{ 1947{
654 *cur = array_nextsize (elem, *cur, cnt); 1948 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur); 1949 return ev_realloc (base, elem * *cur);
656} 1950}
… …
659 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1953 memset ((void *)(base), 0, sizeof (*(base)) * (count))
660 1954
661#define array_needsize(type,base,cur,cnt,init) \ 1955#define array_needsize(type,base,cur,cnt,init) \
662 if (expect_false ((cnt) > (cur))) \ 1956 if (expect_false ((cnt) > (cur))) \
663 { \ 1957 { \
664 int ocur_ = (cur); \ 1958 int ecb_unused ocur_ = (cur); \
665 (base) = (type *)array_realloc \ 1959 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \ 1960 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \ 1961 init ((base) + (ocur_), (cur) - ocur_); \
668 } 1962 }
669 1963
… …
680#define array_free(stem, idx) \ 1974#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1975 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682 1976
683/*****************************************************************************/ 1977/*****************************************************************************/
684 1978
1979/* dummy callback for pending events */
1980static void noinline
1981pendingcb (EV_P_ ev_prepare *w, int revents)
1982{
1983}
1984
685void noinline 1985void noinline
686ev_feed_event (EV_P_ void *w, int revents) 1986ev_feed_event (EV_P_ void *w, int revents) EV_THROW
687{ 1987{
688 W w_ = (W)w; 1988 W w_ = (W)w;
689 int pri = ABSPRI (w_); 1989 int pri = ABSPRI (w_);
690 1990
691 if (expect_false (w_->pending)) 1991 if (expect_false (w_->pending))
… …
695 w_->pending = ++pendingcnt [pri]; 1995 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1996 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697 pendings [pri][w_->pending - 1].w = w_; 1997 pendings [pri][w_->pending - 1].w = w_;
698 pendings [pri][w_->pending - 1].events = revents; 1998 pendings [pri][w_->pending - 1].events = revents;
699 } 1999 }
2000
2001 pendingpri = NUMPRI - 1;
700} 2002}
701 2003
702inline_speed void 2004inline_speed void
703feed_reverse (EV_P_ W w) 2005feed_reverse (EV_P_ W w)
704{ 2006{
… …
724} 2026}
725 2027
726/*****************************************************************************/ 2028/*****************************************************************************/
727 2029
728inline_speed void 2030inline_speed void
729fd_event (EV_P_ int fd, int revents) 2031fd_event_nocheck (EV_P_ int fd, int revents)
730{ 2032{
731 ANFD *anfd = anfds + fd; 2033 ANFD *anfd = anfds + fd;
732 ev_io *w; 2034 ev_io *w;
733 2035
734 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2036 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
738 if (ev) 2040 if (ev)
739 ev_feed_event (EV_A_ (W)w, ev); 2041 ev_feed_event (EV_A_ (W)w, ev);
740 } 2042 }
741} 2043}
742 2044
2045/* do not submit kernel events for fds that have reify set */
2046/* because that means they changed while we were polling for new events */
2047inline_speed void
2048fd_event (EV_P_ int fd, int revents)
2049{
2050 ANFD *anfd = anfds + fd;
2051
2052 if (expect_true (!anfd->reify))
2053 fd_event_nocheck (EV_A_ fd, revents);
2054}
2055
743void 2056void
744ev_feed_fd_event (EV_P_ int fd, int revents) 2057ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
745{ 2058{
746 if (fd >= 0 && fd < anfdmax) 2059 if (fd >= 0 && fd < anfdmax)
747 fd_event (EV_A_ fd, revents); 2060 fd_event_nocheck (EV_A_ fd, revents);
748} 2061}
749 2062
2063/* make sure the external fd watch events are in-sync */
2064/* with the kernel/libev internal state */
750inline_size void 2065inline_size void
751fd_reify (EV_P) 2066fd_reify (EV_P)
752{ 2067{
753 int i; 2068 int i;
2069
2070#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2071 for (i = 0; i < fdchangecnt; ++i)
2072 {
2073 int fd = fdchanges [i];
2074 ANFD *anfd = anfds + fd;
2075
2076 if (anfd->reify & EV__IOFDSET && anfd->head)
2077 {
2078 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2079
2080 if (handle != anfd->handle)
2081 {
2082 unsigned long arg;
2083
2084 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2085
2086 /* handle changed, but fd didn't - we need to do it in two steps */
2087 backend_modify (EV_A_ fd, anfd->events, 0);
2088 anfd->events = 0;
2089 anfd->handle = handle;
2090 }
2091 }
2092 }
2093#endif
754 2094
755 for (i = 0; i < fdchangecnt; ++i) 2095 for (i = 0; i < fdchangecnt; ++i)
756 { 2096 {
757 int fd = fdchanges [i]; 2097 int fd = fdchanges [i];
758 ANFD *anfd = anfds + fd; 2098 ANFD *anfd = anfds + fd;
759 ev_io *w; 2099 ev_io *w;
760 2100
761 unsigned char events = 0; 2101 unsigned char o_events = anfd->events;
2102 unsigned char o_reify = anfd->reify;
762 2103
763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2104 anfd->reify = 0;
764 events |= (unsigned char)w->events;
765 2105
766#if EV_SELECT_IS_WINSOCKET 2106 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
767 if (events)
768 { 2107 {
769 unsigned long arg; 2108 anfd->events = 0;
770 #ifdef EV_FD_TO_WIN32_HANDLE 2109
771 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2110 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
772 #else 2111 anfd->events |= (unsigned char)w->events;
773 anfd->handle = _get_osfhandle (fd); 2112
774 #endif 2113 if (o_events != anfd->events)
775 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2114 o_reify = EV__IOFDSET; /* actually |= */
776 } 2115 }
777#endif
778 2116
779 { 2117 if (o_reify & EV__IOFDSET)
780 unsigned char o_events = anfd->events;
781 unsigned char o_reify = anfd->reify;
782
783 anfd->reify = 0;
784 anfd->events = events;
785
786 if (o_events != events || o_reify & EV__IOFDSET)
787 backend_modify (EV_A_ fd, o_events, events); 2118 backend_modify (EV_A_ fd, o_events, anfd->events);
788 }
789 } 2119 }
790 2120
791 fdchangecnt = 0; 2121 fdchangecnt = 0;
792} 2122}
793 2123
2124/* something about the given fd changed */
794inline_size void 2125inline_size void
795fd_change (EV_P_ int fd, int flags) 2126fd_change (EV_P_ int fd, int flags)
796{ 2127{
797 unsigned char reify = anfds [fd].reify; 2128 unsigned char reify = anfds [fd].reify;
798 anfds [fd].reify |= flags; 2129 anfds [fd].reify |= flags;
… …
803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2134 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
804 fdchanges [fdchangecnt - 1] = fd; 2135 fdchanges [fdchangecnt - 1] = fd;
805 } 2136 }
806} 2137}
807 2138
2139/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
808inline_speed void 2140inline_speed void ecb_cold
809fd_kill (EV_P_ int fd) 2141fd_kill (EV_P_ int fd)
810{ 2142{
811 ev_io *w; 2143 ev_io *w;
812 2144
813 while ((w = (ev_io *)anfds [fd].head)) 2145 while ((w = (ev_io *)anfds [fd].head))
… …
815 ev_io_stop (EV_A_ w); 2147 ev_io_stop (EV_A_ w);
816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2148 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
817 } 2149 }
818} 2150}
819 2151
2152/* check whether the given fd is actually valid, for error recovery */
820inline_size int 2153inline_size int ecb_cold
821fd_valid (int fd) 2154fd_valid (int fd)
822{ 2155{
823#ifdef _WIN32 2156#ifdef _WIN32
824 return _get_osfhandle (fd) != -1; 2157 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
825#else 2158#else
826 return fcntl (fd, F_GETFD) != -1; 2159 return fcntl (fd, F_GETFD) != -1;
827#endif 2160#endif
828} 2161}
829 2162
830/* called on EBADF to verify fds */ 2163/* called on EBADF to verify fds */
831static void noinline 2164static void noinline ecb_cold
832fd_ebadf (EV_P) 2165fd_ebadf (EV_P)
833{ 2166{
834 int fd; 2167 int fd;
835 2168
836 for (fd = 0; fd < anfdmax; ++fd) 2169 for (fd = 0; fd < anfdmax; ++fd)
… …
838 if (!fd_valid (fd) && errno == EBADF) 2171 if (!fd_valid (fd) && errno == EBADF)
839 fd_kill (EV_A_ fd); 2172 fd_kill (EV_A_ fd);
840} 2173}
841 2174
842/* called on ENOMEM in select/poll to kill some fds and retry */ 2175/* called on ENOMEM in select/poll to kill some fds and retry */
843static void noinline 2176static void noinline ecb_cold
844fd_enomem (EV_P) 2177fd_enomem (EV_P)
845{ 2178{
846 int fd; 2179 int fd;
847 2180
848 for (fd = anfdmax; fd--; ) 2181 for (fd = anfdmax; fd--; )
849 if (anfds [fd].events) 2182 if (anfds [fd].events)
850 { 2183 {
851 fd_kill (EV_A_ fd); 2184 fd_kill (EV_A_ fd);
852 return; 2185 break;
853 } 2186 }
854} 2187}
855 2188
856/* usually called after fork if backend needs to re-arm all fds from scratch */ 2189/* usually called after fork if backend needs to re-arm all fds from scratch */
857static void noinline 2190static void noinline
… …
862 for (fd = 0; fd < anfdmax; ++fd) 2195 for (fd = 0; fd < anfdmax; ++fd)
863 if (anfds [fd].events) 2196 if (anfds [fd].events)
864 { 2197 {
865 anfds [fd].events = 0; 2198 anfds [fd].events = 0;
866 anfds [fd].emask = 0; 2199 anfds [fd].emask = 0;
867 fd_change (EV_A_ fd, EV__IOFDSET | 1); 2200 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
868 } 2201 }
869} 2202}
870 2203
2204/* used to prepare libev internal fd's */
2205/* this is not fork-safe */
2206inline_speed void
2207fd_intern (int fd)
2208{
2209#ifdef _WIN32
2210 unsigned long arg = 1;
2211 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2212#else
2213 fcntl (fd, F_SETFD, FD_CLOEXEC);
2214 fcntl (fd, F_SETFL, O_NONBLOCK);
2215#endif
2216}
2217
871/*****************************************************************************/ 2218/*****************************************************************************/
872 2219
873/* 2220/*
874 * the heap functions want a real array index. array index 0 uis guaranteed to not 2221 * the heap functions want a real array index. array index 0 is guaranteed to not
875 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2222 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
876 * the branching factor of the d-tree. 2223 * the branching factor of the d-tree.
877 */ 2224 */
878 2225
879/* 2226/*
… …
947 2294
948 for (;;) 2295 for (;;)
949 { 2296 {
950 int c = k << 1; 2297 int c = k << 1;
951 2298
952 if (c > N + HEAP0 - 1) 2299 if (c >= N + HEAP0)
953 break; 2300 break;
954 2301
955 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2302 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956 ? 1 : 0; 2303 ? 1 : 0;
957 2304
… …
989 2336
990 heap [k] = he; 2337 heap [k] = he;
991 ev_active (ANHE_w (he)) = k; 2338 ev_active (ANHE_w (he)) = k;
992} 2339}
993 2340
2341/* move an element suitably so it is in a correct place */
994inline_size void 2342inline_size void
995adjustheap (ANHE *heap, int N, int k) 2343adjustheap (ANHE *heap, int N, int k)
996{ 2344{
997 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2345 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
998 upheap (heap, k); 2346 upheap (heap, k);
999 else 2347 else
1000 downheap (heap, N, k); 2348 downheap (heap, N, k);
1001} 2349}
1002 2350
… …
1012 upheap (heap, i + HEAP0); 2360 upheap (heap, i + HEAP0);
1013} 2361}
1014 2362
1015/*****************************************************************************/ 2363/*****************************************************************************/
1016 2364
2365/* associate signal watchers to a signal signal */
1017typedef struct 2366typedef struct
1018{ 2367{
2368 EV_ATOMIC_T pending;
2369#if EV_MULTIPLICITY
2370 EV_P;
2371#endif
1019 WL head; 2372 WL head;
1020 EV_ATOMIC_T gotsig;
1021} ANSIG; 2373} ANSIG;
1022 2374
1023static ANSIG *signals; 2375static ANSIG signals [EV_NSIG - 1];
1024static int signalmax;
1025
1026static EV_ATOMIC_T gotsig;
1027 2376
1028/*****************************************************************************/ 2377/*****************************************************************************/
1029 2378
2379#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2380
2381static void noinline ecb_cold
2382evpipe_init (EV_P)
2383{
2384 if (!ev_is_active (&pipe_w))
2385 {
2386 int fds [2];
2387
2388# if EV_USE_EVENTFD
2389 fds [0] = -1;
2390 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2391 if (fds [1] < 0 && errno == EINVAL)
2392 fds [1] = eventfd (0, 0);
2393
2394 if (fds [1] < 0)
2395# endif
2396 {
2397 while (pipe (fds))
2398 ev_syserr ("(libev) error creating signal/async pipe");
2399
2400 fd_intern (fds [0]);
2401 }
2402
2403 evpipe [0] = fds [0];
2404
2405 if (evpipe [1] < 0)
2406 evpipe [1] = fds [1]; /* first call, set write fd */
2407 else
2408 {
2409 /* on subsequent calls, do not change evpipe [1] */
2410 /* so that evpipe_write can always rely on its value. */
2411 /* this branch does not do anything sensible on windows, */
2412 /* so must not be executed on windows */
2413
2414 dup2 (fds [1], evpipe [1]);
2415 close (fds [1]);
2416 }
2417
2418 fd_intern (evpipe [1]);
2419
2420 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2421 ev_io_start (EV_A_ &pipe_w);
2422 ev_unref (EV_A); /* watcher should not keep loop alive */
2423 }
2424}
2425
1030inline_speed void 2426inline_speed void
1031fd_intern (int fd) 2427evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1032{ 2428{
1033#ifdef _WIN32 2429 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1034 unsigned long arg = 1;
1035 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1036#else
1037 fcntl (fd, F_SETFD, FD_CLOEXEC);
1038 fcntl (fd, F_SETFL, O_NONBLOCK);
1039#endif
1040}
1041 2430
1042static void noinline 2431 if (expect_true (*flag))
1043evpipe_init (EV_P) 2432 return;
1044{ 2433
1045 if (!ev_is_active (&pipeev)) 2434 *flag = 1;
2435 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2436
2437 pipe_write_skipped = 1;
2438
2439 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2440
2441 if (pipe_write_wanted)
1046 { 2442 {
2443 int old_errno;
2444
2445 pipe_write_skipped = 0;
2446 ECB_MEMORY_FENCE_RELEASE;
2447
2448 old_errno = errno; /* save errno because write will clobber it */
2449
1047#if EV_USE_EVENTFD 2450#if EV_USE_EVENTFD
1048 if ((evfd = eventfd (0, 0)) >= 0) 2451 if (evpipe [0] < 0)
1049 { 2452 {
1050 evpipe [0] = -1; 2453 uint64_t counter = 1;
1051 fd_intern (evfd); 2454 write (evpipe [1], &counter, sizeof (uint64_t));
1052 ev_io_set (&pipeev, evfd, EV_READ);
1053 } 2455 }
1054 else 2456 else
1055#endif 2457#endif
1056 { 2458 {
1057 while (pipe (evpipe)) 2459#ifdef _WIN32
1058 ev_syserr ("(libev) error creating signal/async pipe"); 2460 WSABUF buf;
1059 2461 DWORD sent;
1060 fd_intern (evpipe [0]); 2462 buf.buf = &buf;
1061 fd_intern (evpipe [1]); 2463 buf.len = 1;
1062 ev_io_set (&pipeev, evpipe [0], EV_READ); 2464 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2465#else
2466 write (evpipe [1], &(evpipe [1]), 1);
2467#endif
1063 } 2468 }
1064 2469
1065 ev_io_start (EV_A_ &pipeev); 2470 errno = old_errno;
1066 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 }
1068}
1069
1070inline_size void
1071evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072{
1073 if (!*flag)
1074 { 2471 }
1075 int old_errno = errno; /* save errno because write might clobber it */ 2472}
1076 2473
1077 *flag = 1; 2474/* called whenever the libev signal pipe */
2475/* got some events (signal, async) */
2476static void
2477pipecb (EV_P_ ev_io *iow, int revents)
2478{
2479 int i;
1078 2480
2481 if (revents & EV_READ)
2482 {
1079#if EV_USE_EVENTFD 2483#if EV_USE_EVENTFD
1080 if (evfd >= 0) 2484 if (evpipe [0] < 0)
1081 { 2485 {
1082 uint64_t counter = 1; 2486 uint64_t counter;
1083 write (evfd, &counter, sizeof (uint64_t)); 2487 read (evpipe [1], &counter, sizeof (uint64_t));
1084 } 2488 }
1085 else 2489 else
1086#endif 2490#endif
1087 write (evpipe [1], &old_errno, 1); 2491 {
1088
1089 errno = old_errno;
1090 }
1091}
1092
1093static void
1094pipecb (EV_P_ ev_io *iow, int revents)
1095{
1096#if EV_USE_EVENTFD
1097 if (evfd >= 0)
1098 {
1099 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t));
1101 }
1102 else
1103#endif
1104 {
1105 char dummy; 2492 char dummy[4];
2493#ifdef _WIN32
2494 WSABUF buf;
2495 DWORD recvd;
2496 DWORD flags = 0;
2497 buf.buf = dummy;
2498 buf.len = sizeof (dummy);
2499 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2500#else
1106 read (evpipe [0], &dummy, 1); 2501 read (evpipe [0], &dummy, sizeof (dummy));
2502#endif
2503 }
2504 }
2505
2506 pipe_write_skipped = 0;
2507
2508 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2509
2510#if EV_SIGNAL_ENABLE
2511 if (sig_pending)
1107 } 2512 {
2513 sig_pending = 0;
1108 2514
1109 if (gotsig && ev_is_default_loop (EV_A)) 2515 ECB_MEMORY_FENCE;
1110 {
1111 int signum;
1112 gotsig = 0;
1113 2516
1114 for (signum = signalmax; signum--; ) 2517 for (i = EV_NSIG - 1; i--; )
1115 if (signals [signum].gotsig) 2518 if (expect_false (signals [i].pending))
1116 ev_feed_signal_event (EV_A_ signum + 1); 2519 ev_feed_signal_event (EV_A_ i + 1);
1117 } 2520 }
2521#endif
1118 2522
1119#if EV_ASYNC_ENABLE 2523#if EV_ASYNC_ENABLE
1120 if (gotasync) 2524 if (async_pending)
1121 { 2525 {
1122 int i; 2526 async_pending = 0;
1123 gotasync = 0; 2527
2528 ECB_MEMORY_FENCE;
1124 2529
1125 for (i = asynccnt; i--; ) 2530 for (i = asynccnt; i--; )
1126 if (asyncs [i]->sent) 2531 if (asyncs [i]->sent)
1127 { 2532 {
1128 asyncs [i]->sent = 0; 2533 asyncs [i]->sent = 0;
2534 ECB_MEMORY_FENCE_RELEASE;
1129 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2535 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1130 } 2536 }
1131 } 2537 }
1132#endif 2538#endif
1133} 2539}
1134 2540
1135/*****************************************************************************/ 2541/*****************************************************************************/
1136 2542
2543void
2544ev_feed_signal (int signum) EV_THROW
2545{
2546#if EV_MULTIPLICITY
2547 EV_P;
2548 ECB_MEMORY_FENCE_ACQUIRE;
2549 EV_A = signals [signum - 1].loop;
2550
2551 if (!EV_A)
2552 return;
2553#endif
2554
2555 signals [signum - 1].pending = 1;
2556 evpipe_write (EV_A_ &sig_pending);
2557}
2558
1137static void 2559static void
1138ev_sighandler (int signum) 2560ev_sighandler (int signum)
1139{ 2561{
2562#ifdef _WIN32
2563 signal (signum, ev_sighandler);
2564#endif
2565
2566 ev_feed_signal (signum);
2567}
2568
2569void noinline
2570ev_feed_signal_event (EV_P_ int signum) EV_THROW
2571{
2572 WL w;
2573
2574 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2575 return;
2576
2577 --signum;
2578
1140#if EV_MULTIPLICITY 2579#if EV_MULTIPLICITY
1141 struct ev_loop *loop = &default_loop_struct; 2580 /* it is permissible to try to feed a signal to the wrong loop */
1142#endif 2581 /* or, likely more useful, feeding a signal nobody is waiting for */
1143 2582
1144#if _WIN32 2583 if (expect_false (signals [signum].loop != EV_A))
1145 signal (signum, ev_sighandler);
1146#endif
1147
1148 signals [signum - 1].gotsig = 1;
1149 evpipe_write (EV_A_ &gotsig);
1150}
1151
1152void noinline
1153ev_feed_signal_event (EV_P_ int signum)
1154{
1155 WL w;
1156
1157#if EV_MULTIPLICITY
1158 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1159#endif
1160
1161 --signum;
1162
1163 if (signum < 0 || signum >= signalmax)
1164 return; 2584 return;
2585#endif
1165 2586
1166 signals [signum].gotsig = 0; 2587 signals [signum].pending = 0;
2588 ECB_MEMORY_FENCE_RELEASE;
1167 2589
1168 for (w = signals [signum].head; w; w = w->next) 2590 for (w = signals [signum].head; w; w = w->next)
1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2591 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170} 2592}
1171 2593
2594#if EV_USE_SIGNALFD
2595static void
2596sigfdcb (EV_P_ ev_io *iow, int revents)
2597{
2598 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2599
2600 for (;;)
2601 {
2602 ssize_t res = read (sigfd, si, sizeof (si));
2603
2604 /* not ISO-C, as res might be -1, but works with SuS */
2605 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2606 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2607
2608 if (res < (ssize_t)sizeof (si))
2609 break;
2610 }
2611}
2612#endif
2613
2614#endif
2615
1172/*****************************************************************************/ 2616/*****************************************************************************/
1173 2617
2618#if EV_CHILD_ENABLE
1174static WL childs [EV_PID_HASHSIZE]; 2619static WL childs [EV_PID_HASHSIZE];
1175
1176#ifndef _WIN32
1177 2620
1178static ev_signal childev; 2621static ev_signal childev;
1179 2622
1180#ifndef WIFCONTINUED 2623#ifndef WIFCONTINUED
1181# define WIFCONTINUED(status) 0 2624# define WIFCONTINUED(status) 0
1182#endif 2625#endif
1183 2626
2627/* handle a single child status event */
1184inline_speed void 2628inline_speed void
1185child_reap (EV_P_ int chain, int pid, int status) 2629child_reap (EV_P_ int chain, int pid, int status)
1186{ 2630{
1187 ev_child *w; 2631 ev_child *w;
1188 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2632 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189 2633
1190 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2634 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 { 2635 {
1192 if ((w->pid == pid || !w->pid) 2636 if ((w->pid == pid || !w->pid)
1193 && (!traced || (w->flags & 1))) 2637 && (!traced || (w->flags & 1)))
1194 { 2638 {
1195 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2639 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1202 2646
1203#ifndef WCONTINUED 2647#ifndef WCONTINUED
1204# define WCONTINUED 0 2648# define WCONTINUED 0
1205#endif 2649#endif
1206 2650
2651/* called on sigchld etc., calls waitpid */
1207static void 2652static void
1208childcb (EV_P_ ev_signal *sw, int revents) 2653childcb (EV_P_ ev_signal *sw, int revents)
1209{ 2654{
1210 int pid, status; 2655 int pid, status;
1211 2656
… …
1219 /* make sure we are called again until all children have been reaped */ 2664 /* make sure we are called again until all children have been reaped */
1220 /* we need to do it this way so that the callback gets called before we continue */ 2665 /* we need to do it this way so that the callback gets called before we continue */
1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2666 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1222 2667
1223 child_reap (EV_A_ pid, pid, status); 2668 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1) 2669 if ((EV_PID_HASHSIZE) > 1)
1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2670 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1226} 2671}
1227 2672
1228#endif 2673#endif
1229 2674
1230/*****************************************************************************/ 2675/*****************************************************************************/
1231 2676
2677#if EV_USE_IOCP
2678# include "ev_iocp.c"
2679#endif
1232#if EV_USE_PORT 2680#if EV_USE_PORT
1233# include "ev_port.c" 2681# include "ev_port.c"
1234#endif 2682#endif
1235#if EV_USE_KQUEUE 2683#if EV_USE_KQUEUE
1236# include "ev_kqueue.c" 2684# include "ev_kqueue.c"
… …
1243#endif 2691#endif
1244#if EV_USE_SELECT 2692#if EV_USE_SELECT
1245# include "ev_select.c" 2693# include "ev_select.c"
1246#endif 2694#endif
1247 2695
1248int 2696int ecb_cold
1249ev_version_major (void) 2697ev_version_major (void) EV_THROW
1250{ 2698{
1251 return EV_VERSION_MAJOR; 2699 return EV_VERSION_MAJOR;
1252} 2700}
1253 2701
1254int 2702int ecb_cold
1255ev_version_minor (void) 2703ev_version_minor (void) EV_THROW
1256{ 2704{
1257 return EV_VERSION_MINOR; 2705 return EV_VERSION_MINOR;
1258} 2706}
1259 2707
1260/* return true if we are running with elevated privileges and should ignore env variables */ 2708/* return true if we are running with elevated privileges and should ignore env variables */
1261int inline_size 2709int inline_size ecb_cold
1262enable_secure (void) 2710enable_secure (void)
1263{ 2711{
1264#ifdef _WIN32 2712#ifdef _WIN32
1265 return 0; 2713 return 0;
1266#else 2714#else
1267 return getuid () != geteuid () 2715 return getuid () != geteuid ()
1268 || getgid () != getegid (); 2716 || getgid () != getegid ();
1269#endif 2717#endif
1270} 2718}
1271 2719
1272unsigned int 2720unsigned int ecb_cold
1273ev_supported_backends (void) 2721ev_supported_backends (void) EV_THROW
1274{ 2722{
1275 unsigned int flags = 0; 2723 unsigned int flags = 0;
1276 2724
1277 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2725 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1278 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2726 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1281 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2729 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1282 2730
1283 return flags; 2731 return flags;
1284} 2732}
1285 2733
1286unsigned int 2734unsigned int ecb_cold
1287ev_recommended_backends (void) 2735ev_recommended_backends (void) EV_THROW
1288{ 2736{
1289 unsigned int flags = ev_supported_backends (); 2737 unsigned int flags = ev_supported_backends ();
1290 2738
1291#ifndef __NetBSD__ 2739#ifndef __NetBSD__
1292 /* kqueue is borked on everything but netbsd apparently */ 2740 /* kqueue is borked on everything but netbsd apparently */
… …
1296#ifdef __APPLE__ 2744#ifdef __APPLE__
1297 /* only select works correctly on that "unix-certified" platform */ 2745 /* only select works correctly on that "unix-certified" platform */
1298 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2746 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2747 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1300#endif 2748#endif
2749#ifdef __FreeBSD__
2750 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2751#endif
1301 2752
1302 return flags; 2753 return flags;
1303} 2754}
1304 2755
2756unsigned int ecb_cold
2757ev_embeddable_backends (void) EV_THROW
2758{
2759 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2760
2761 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2762 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2763 flags &= ~EVBACKEND_EPOLL;
2764
2765 return flags;
2766}
2767
1305unsigned int 2768unsigned int
1306ev_embeddable_backends (void) 2769ev_backend (EV_P) EV_THROW
1307{ 2770{
1308 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2771 return backend;
1309
1310 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 /* please fix it and tell me how to detect the fix */
1312 flags &= ~EVBACKEND_EPOLL;
1313
1314 return flags;
1315} 2772}
1316 2773
2774#if EV_FEATURE_API
1317unsigned int 2775unsigned int
1318ev_backend (EV_P) 2776ev_iteration (EV_P) EV_THROW
1319{ 2777{
1320 return backend; 2778 return loop_count;
1321} 2779}
1322 2780
1323unsigned int 2781unsigned int
1324ev_loop_count (EV_P) 2782ev_depth (EV_P) EV_THROW
1325{ 2783{
1326 return loop_count; 2784 return loop_depth;
1327} 2785}
1328 2786
1329void 2787void
1330ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2788ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1331{ 2789{
1332 io_blocktime = interval; 2790 io_blocktime = interval;
1333} 2791}
1334 2792
1335void 2793void
1336ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2794ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1337{ 2795{
1338 timeout_blocktime = interval; 2796 timeout_blocktime = interval;
1339} 2797}
1340 2798
2799void
2800ev_set_userdata (EV_P_ void *data) EV_THROW
2801{
2802 userdata = data;
2803}
2804
2805void *
2806ev_userdata (EV_P) EV_THROW
2807{
2808 return userdata;
2809}
2810
2811void
2812ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2813{
2814 invoke_cb = invoke_pending_cb;
2815}
2816
2817void
2818ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2819{
2820 release_cb = release;
2821 acquire_cb = acquire;
2822}
2823#endif
2824
2825/* initialise a loop structure, must be zero-initialised */
1341static void noinline 2826static void noinline ecb_cold
1342loop_init (EV_P_ unsigned int flags) 2827loop_init (EV_P_ unsigned int flags) EV_THROW
1343{ 2828{
1344 if (!backend) 2829 if (!backend)
1345 { 2830 {
2831 origflags = flags;
2832
1346#if EV_USE_REALTIME 2833#if EV_USE_REALTIME
1347 if (!have_realtime) 2834 if (!have_realtime)
1348 { 2835 {
1349 struct timespec ts; 2836 struct timespec ts;
1350 2837
… …
1361 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2848 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362 have_monotonic = 1; 2849 have_monotonic = 1;
1363 } 2850 }
1364#endif 2851#endif
1365 2852
1366 ev_rt_now = ev_time ();
1367 mn_now = get_clock ();
1368 now_floor = mn_now;
1369 rtmn_diff = ev_rt_now - mn_now;
1370
1371 io_blocktime = 0.;
1372 timeout_blocktime = 0.;
1373 backend = 0;
1374 backend_fd = -1;
1375 gotasync = 0;
1376#if EV_USE_INOTIFY
1377 fs_fd = -2;
1378#endif
1379
1380 /* pid check not overridable via env */ 2853 /* pid check not overridable via env */
1381#ifndef _WIN32 2854#ifndef _WIN32
1382 if (flags & EVFLAG_FORKCHECK) 2855 if (flags & EVFLAG_FORKCHECK)
1383 curpid = getpid (); 2856 curpid = getpid ();
1384#endif 2857#endif
… …
1386 if (!(flags & EVFLAG_NOENV) 2859 if (!(flags & EVFLAG_NOENV)
1387 && !enable_secure () 2860 && !enable_secure ()
1388 && getenv ("LIBEV_FLAGS")) 2861 && getenv ("LIBEV_FLAGS"))
1389 flags = atoi (getenv ("LIBEV_FLAGS")); 2862 flags = atoi (getenv ("LIBEV_FLAGS"));
1390 2863
1391 if (!(flags & 0x0000ffffU)) 2864 ev_rt_now = ev_time ();
2865 mn_now = get_clock ();
2866 now_floor = mn_now;
2867 rtmn_diff = ev_rt_now - mn_now;
2868#if EV_FEATURE_API
2869 invoke_cb = ev_invoke_pending;
2870#endif
2871
2872 io_blocktime = 0.;
2873 timeout_blocktime = 0.;
2874 backend = 0;
2875 backend_fd = -1;
2876 sig_pending = 0;
2877#if EV_ASYNC_ENABLE
2878 async_pending = 0;
2879#endif
2880 pipe_write_skipped = 0;
2881 pipe_write_wanted = 0;
2882 evpipe [0] = -1;
2883 evpipe [1] = -1;
2884#if EV_USE_INOTIFY
2885 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2886#endif
2887#if EV_USE_SIGNALFD
2888 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2889#endif
2890
2891 if (!(flags & EVBACKEND_MASK))
1392 flags |= ev_recommended_backends (); 2892 flags |= ev_recommended_backends ();
1393 2893
2894#if EV_USE_IOCP
2895 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2896#endif
1394#if EV_USE_PORT 2897#if EV_USE_PORT
1395 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2898 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1396#endif 2899#endif
1397#if EV_USE_KQUEUE 2900#if EV_USE_KQUEUE
1398 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2901 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1405#endif 2908#endif
1406#if EV_USE_SELECT 2909#if EV_USE_SELECT
1407 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2910 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1408#endif 2911#endif
1409 2912
2913 ev_prepare_init (&pending_w, pendingcb);
2914
2915#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1410 ev_init (&pipeev, pipecb); 2916 ev_init (&pipe_w, pipecb);
1411 ev_set_priority (&pipeev, EV_MAXPRI); 2917 ev_set_priority (&pipe_w, EV_MAXPRI);
2918#endif
1412 } 2919 }
1413} 2920}
1414 2921
1415static void noinline 2922/* free up a loop structure */
2923void ecb_cold
1416loop_destroy (EV_P) 2924ev_loop_destroy (EV_P)
1417{ 2925{
1418 int i; 2926 int i;
1419 2927
2928#if EV_MULTIPLICITY
2929 /* mimic free (0) */
2930 if (!EV_A)
2931 return;
2932#endif
2933
2934#if EV_CLEANUP_ENABLE
2935 /* queue cleanup watchers (and execute them) */
2936 if (expect_false (cleanupcnt))
2937 {
2938 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2939 EV_INVOKE_PENDING;
2940 }
2941#endif
2942
2943#if EV_CHILD_ENABLE
2944 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2945 {
2946 ev_ref (EV_A); /* child watcher */
2947 ev_signal_stop (EV_A_ &childev);
2948 }
2949#endif
2950
1420 if (ev_is_active (&pipeev)) 2951 if (ev_is_active (&pipe_w))
1421 { 2952 {
1422 ev_ref (EV_A); /* signal watcher */ 2953 /*ev_ref (EV_A);*/
1423 ev_io_stop (EV_A_ &pipeev); 2954 /*ev_io_stop (EV_A_ &pipe_w);*/
1424 2955
2956 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2957 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2958 }
2959
1425#if EV_USE_EVENTFD 2960#if EV_USE_SIGNALFD
1426 if (evfd >= 0) 2961 if (ev_is_active (&sigfd_w))
1427 close (evfd); 2962 close (sigfd);
1428#endif 2963#endif
1429
1430 if (evpipe [0] >= 0)
1431 {
1432 close (evpipe [0]);
1433 close (evpipe [1]);
1434 }
1435 }
1436 2964
1437#if EV_USE_INOTIFY 2965#if EV_USE_INOTIFY
1438 if (fs_fd >= 0) 2966 if (fs_fd >= 0)
1439 close (fs_fd); 2967 close (fs_fd);
1440#endif 2968#endif
1441 2969
1442 if (backend_fd >= 0) 2970 if (backend_fd >= 0)
1443 close (backend_fd); 2971 close (backend_fd);
1444 2972
2973#if EV_USE_IOCP
2974 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2975#endif
1445#if EV_USE_PORT 2976#if EV_USE_PORT
1446 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2977 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1447#endif 2978#endif
1448#if EV_USE_KQUEUE 2979#if EV_USE_KQUEUE
1449 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2980 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1464#if EV_IDLE_ENABLE 2995#if EV_IDLE_ENABLE
1465 array_free (idle, [i]); 2996 array_free (idle, [i]);
1466#endif 2997#endif
1467 } 2998 }
1468 2999
1469 ev_free (anfds); anfdmax = 0; 3000 ev_free (anfds); anfds = 0; anfdmax = 0;
1470 3001
1471 /* have to use the microsoft-never-gets-it-right macro */ 3002 /* have to use the microsoft-never-gets-it-right macro */
1472 array_free (rfeed, EMPTY); 3003 array_free (rfeed, EMPTY);
1473 array_free (fdchange, EMPTY); 3004 array_free (fdchange, EMPTY);
1474 array_free (timer, EMPTY); 3005 array_free (timer, EMPTY);
… …
1476 array_free (periodic, EMPTY); 3007 array_free (periodic, EMPTY);
1477#endif 3008#endif
1478#if EV_FORK_ENABLE 3009#if EV_FORK_ENABLE
1479 array_free (fork, EMPTY); 3010 array_free (fork, EMPTY);
1480#endif 3011#endif
3012#if EV_CLEANUP_ENABLE
3013 array_free (cleanup, EMPTY);
3014#endif
1481 array_free (prepare, EMPTY); 3015 array_free (prepare, EMPTY);
1482 array_free (check, EMPTY); 3016 array_free (check, EMPTY);
1483#if EV_ASYNC_ENABLE 3017#if EV_ASYNC_ENABLE
1484 array_free (async, EMPTY); 3018 array_free (async, EMPTY);
1485#endif 3019#endif
1486 3020
1487 backend = 0; 3021 backend = 0;
3022
3023#if EV_MULTIPLICITY
3024 if (ev_is_default_loop (EV_A))
3025#endif
3026 ev_default_loop_ptr = 0;
3027#if EV_MULTIPLICITY
3028 else
3029 ev_free (EV_A);
3030#endif
1488} 3031}
1489 3032
1490#if EV_USE_INOTIFY 3033#if EV_USE_INOTIFY
1491inline_size void infy_fork (EV_P); 3034inline_size void infy_fork (EV_P);
1492#endif 3035#endif
… …
1505#endif 3048#endif
1506#if EV_USE_INOTIFY 3049#if EV_USE_INOTIFY
1507 infy_fork (EV_A); 3050 infy_fork (EV_A);
1508#endif 3051#endif
1509 3052
1510 if (ev_is_active (&pipeev)) 3053#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3054 if (ev_is_active (&pipe_w) && postfork != 2)
1511 { 3055 {
1512 /* this "locks" the handlers against writing to the pipe */ 3056 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1513 /* while we modify the fd vars */
1514 gotsig = 1;
1515#if EV_ASYNC_ENABLE
1516 gotasync = 1;
1517#endif
1518 3057
1519 ev_ref (EV_A); 3058 ev_ref (EV_A);
1520 ev_io_stop (EV_A_ &pipeev); 3059 ev_io_stop (EV_A_ &pipe_w);
1521
1522#if EV_USE_EVENTFD
1523 if (evfd >= 0)
1524 close (evfd);
1525#endif
1526 3060
1527 if (evpipe [0] >= 0) 3061 if (evpipe [0] >= 0)
1528 { 3062 EV_WIN32_CLOSE_FD (evpipe [0]);
1529 close (evpipe [0]);
1530 close (evpipe [1]);
1531 }
1532 3063
1533 evpipe_init (EV_A); 3064 evpipe_init (EV_A);
1534 /* now iterate over everything, in case we missed something */ 3065 /* iterate over everything, in case we missed something before */
1535 pipecb (EV_A_ &pipeev, EV_READ); 3066 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1536 } 3067 }
3068#endif
1537 3069
1538 postfork = 0; 3070 postfork = 0;
1539} 3071}
1540 3072
1541#if EV_MULTIPLICITY 3073#if EV_MULTIPLICITY
1542 3074
1543struct ev_loop * 3075struct ev_loop * ecb_cold
1544ev_loop_new (unsigned int flags) 3076ev_loop_new (unsigned int flags) EV_THROW
1545{ 3077{
1546 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3078 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547 3079
1548 memset (loop, 0, sizeof (struct ev_loop)); 3080 memset (EV_A, 0, sizeof (struct ev_loop));
1549
1550 loop_init (EV_A_ flags); 3081 loop_init (EV_A_ flags);
1551 3082
1552 if (ev_backend (EV_A)) 3083 if (ev_backend (EV_A))
1553 return loop; 3084 return EV_A;
1554 3085
3086 ev_free (EV_A);
1555 return 0; 3087 return 0;
1556} 3088}
1557 3089
1558void 3090#endif /* multiplicity */
1559ev_loop_destroy (EV_P)
1560{
1561 loop_destroy (EV_A);
1562 ev_free (loop);
1563}
1564
1565void
1566ev_loop_fork (EV_P)
1567{
1568 postfork = 1; /* must be in line with ev_default_fork */
1569}
1570 3091
1571#if EV_VERIFY 3092#if EV_VERIFY
1572static void noinline 3093static void noinline ecb_cold
1573verify_watcher (EV_P_ W w) 3094verify_watcher (EV_P_ W w)
1574{ 3095{
1575 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3096 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576 3097
1577 if (w->pending) 3098 if (w->pending)
1578 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3099 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579} 3100}
1580 3101
1581static void noinline 3102static void noinline ecb_cold
1582verify_heap (EV_P_ ANHE *heap, int N) 3103verify_heap (EV_P_ ANHE *heap, int N)
1583{ 3104{
1584 int i; 3105 int i;
1585 3106
1586 for (i = HEAP0; i < N + HEAP0; ++i) 3107 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1591 3112
1592 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3113 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593 } 3114 }
1594} 3115}
1595 3116
1596static void noinline 3117static void noinline ecb_cold
1597array_verify (EV_P_ W *ws, int cnt) 3118array_verify (EV_P_ W *ws, int cnt)
1598{ 3119{
1599 while (cnt--) 3120 while (cnt--)
1600 { 3121 {
1601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3122 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 verify_watcher (EV_A_ ws [cnt]); 3123 verify_watcher (EV_A_ ws [cnt]);
1603 } 3124 }
1604} 3125}
1605#endif 3126#endif
1606 3127
1607void 3128#if EV_FEATURE_API
1608ev_loop_verify (EV_P) 3129void ecb_cold
3130ev_verify (EV_P) EV_THROW
1609{ 3131{
1610#if EV_VERIFY 3132#if EV_VERIFY
1611 int i; 3133 int i;
1612 WL w; 3134 WL w, w2;
1613 3135
1614 assert (activecnt >= -1); 3136 assert (activecnt >= -1);
1615 3137
1616 assert (fdchangemax >= fdchangecnt); 3138 assert (fdchangemax >= fdchangecnt);
1617 for (i = 0; i < fdchangecnt; ++i) 3139 for (i = 0; i < fdchangecnt; ++i)
1618 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3140 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1619 3141
1620 assert (anfdmax >= 0); 3142 assert (anfdmax >= 0);
1621 for (i = 0; i < anfdmax; ++i) 3143 for (i = 0; i < anfdmax; ++i)
3144 {
3145 int j = 0;
3146
1622 for (w = anfds [i].head; w; w = w->next) 3147 for (w = w2 = anfds [i].head; w; w = w->next)
1623 { 3148 {
1624 verify_watcher (EV_A_ (W)w); 3149 verify_watcher (EV_A_ (W)w);
3150
3151 if (j++ & 1)
3152 {
3153 assert (("libev: io watcher list contains a loop", w != w2));
3154 w2 = w2->next;
3155 }
3156
1625 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3157 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1626 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3158 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1627 } 3159 }
3160 }
1628 3161
1629 assert (timermax >= timercnt); 3162 assert (timermax >= timercnt);
1630 verify_heap (EV_A_ timers, timercnt); 3163 verify_heap (EV_A_ timers, timercnt);
1631 3164
1632#if EV_PERIODIC_ENABLE 3165#if EV_PERIODIC_ENABLE
… …
1647#if EV_FORK_ENABLE 3180#if EV_FORK_ENABLE
1648 assert (forkmax >= forkcnt); 3181 assert (forkmax >= forkcnt);
1649 array_verify (EV_A_ (W *)forks, forkcnt); 3182 array_verify (EV_A_ (W *)forks, forkcnt);
1650#endif 3183#endif
1651 3184
3185#if EV_CLEANUP_ENABLE
3186 assert (cleanupmax >= cleanupcnt);
3187 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3188#endif
3189
1652#if EV_ASYNC_ENABLE 3190#if EV_ASYNC_ENABLE
1653 assert (asyncmax >= asynccnt); 3191 assert (asyncmax >= asynccnt);
1654 array_verify (EV_A_ (W *)asyncs, asynccnt); 3192 array_verify (EV_A_ (W *)asyncs, asynccnt);
1655#endif 3193#endif
1656 3194
3195#if EV_PREPARE_ENABLE
1657 assert (preparemax >= preparecnt); 3196 assert (preparemax >= preparecnt);
1658 array_verify (EV_A_ (W *)prepares, preparecnt); 3197 array_verify (EV_A_ (W *)prepares, preparecnt);
3198#endif
1659 3199
3200#if EV_CHECK_ENABLE
1660 assert (checkmax >= checkcnt); 3201 assert (checkmax >= checkcnt);
1661 array_verify (EV_A_ (W *)checks, checkcnt); 3202 array_verify (EV_A_ (W *)checks, checkcnt);
3203#endif
1662 3204
1663# if 0 3205# if 0
3206#if EV_CHILD_ENABLE
1664 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3207 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1665 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 3208 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3209#endif
1666# endif 3210# endif
1667#endif 3211#endif
1668} 3212}
1669 3213#endif
1670#endif /* multiplicity */
1671 3214
1672#if EV_MULTIPLICITY 3215#if EV_MULTIPLICITY
1673struct ev_loop * 3216struct ev_loop * ecb_cold
1674ev_default_loop_init (unsigned int flags)
1675#else 3217#else
1676int 3218int
3219#endif
1677ev_default_loop (unsigned int flags) 3220ev_default_loop (unsigned int flags) EV_THROW
1678#endif
1679{ 3221{
1680 if (!ev_default_loop_ptr) 3222 if (!ev_default_loop_ptr)
1681 { 3223 {
1682#if EV_MULTIPLICITY 3224#if EV_MULTIPLICITY
1683 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3225 EV_P = ev_default_loop_ptr = &default_loop_struct;
1684#else 3226#else
1685 ev_default_loop_ptr = 1; 3227 ev_default_loop_ptr = 1;
1686#endif 3228#endif
1687 3229
1688 loop_init (EV_A_ flags); 3230 loop_init (EV_A_ flags);
1689 3231
1690 if (ev_backend (EV_A)) 3232 if (ev_backend (EV_A))
1691 { 3233 {
1692#ifndef _WIN32 3234#if EV_CHILD_ENABLE
1693 ev_signal_init (&childev, childcb, SIGCHLD); 3235 ev_signal_init (&childev, childcb, SIGCHLD);
1694 ev_set_priority (&childev, EV_MAXPRI); 3236 ev_set_priority (&childev, EV_MAXPRI);
1695 ev_signal_start (EV_A_ &childev); 3237 ev_signal_start (EV_A_ &childev);
1696 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3238 ev_unref (EV_A); /* child watcher should not keep loop alive */
1697#endif 3239#endif
… …
1702 3244
1703 return ev_default_loop_ptr; 3245 return ev_default_loop_ptr;
1704} 3246}
1705 3247
1706void 3248void
1707ev_default_destroy (void) 3249ev_loop_fork (EV_P) EV_THROW
1708{ 3250{
1709#if EV_MULTIPLICITY 3251 postfork = 1;
1710 struct ev_loop *loop = ev_default_loop_ptr;
1711#endif
1712
1713 ev_default_loop_ptr = 0;
1714
1715#ifndef _WIN32
1716 ev_ref (EV_A); /* child watcher */
1717 ev_signal_stop (EV_A_ &childev);
1718#endif
1719
1720 loop_destroy (EV_A);
1721}
1722
1723void
1724ev_default_fork (void)
1725{
1726#if EV_MULTIPLICITY
1727 struct ev_loop *loop = ev_default_loop_ptr;
1728#endif
1729
1730 postfork = 1; /* must be in line with ev_loop_fork */
1731} 3252}
1732 3253
1733/*****************************************************************************/ 3254/*****************************************************************************/
1734 3255
1735void 3256void
1736ev_invoke (EV_P_ void *w, int revents) 3257ev_invoke (EV_P_ void *w, int revents)
1737{ 3258{
1738 EV_CB_INVOKE ((W)w, revents); 3259 EV_CB_INVOKE ((W)w, revents);
1739} 3260}
1740 3261
1741inline_speed void 3262unsigned int
1742call_pending (EV_P) 3263ev_pending_count (EV_P) EV_THROW
1743{ 3264{
1744 int pri; 3265 int pri;
3266 unsigned int count = 0;
1745 3267
1746 for (pri = NUMPRI; pri--; ) 3268 for (pri = NUMPRI; pri--; )
3269 count += pendingcnt [pri];
3270
3271 return count;
3272}
3273
3274void noinline
3275ev_invoke_pending (EV_P)
3276{
3277 pendingpri = NUMPRI;
3278
3279 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3280 {
3281 --pendingpri;
3282
1747 while (pendingcnt [pri]) 3283 while (pendingcnt [pendingpri])
1748 {
1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1750
1751 if (expect_true (p->w))
1752 { 3284 {
1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ 3285 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1754 3286
1755 p->w->pending = 0; 3287 p->w->pending = 0;
1756 EV_CB_INVOKE (p->w, p->events); 3288 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK; 3289 EV_FREQUENT_CHECK;
1758 } 3290 }
1759 } 3291 }
1760} 3292}
1761 3293
1762#if EV_IDLE_ENABLE 3294#if EV_IDLE_ENABLE
3295/* make idle watchers pending. this handles the "call-idle */
3296/* only when higher priorities are idle" logic */
1763inline_size void 3297inline_size void
1764idle_reify (EV_P) 3298idle_reify (EV_P)
1765{ 3299{
1766 if (expect_false (idleall)) 3300 if (expect_false (idleall))
1767 { 3301 {
… …
1780 } 3314 }
1781 } 3315 }
1782} 3316}
1783#endif 3317#endif
1784 3318
3319/* make timers pending */
1785inline_size void 3320inline_size void
1786timers_reify (EV_P) 3321timers_reify (EV_P)
1787{ 3322{
1788 EV_FREQUENT_CHECK; 3323 EV_FREQUENT_CHECK;
1789 3324
… …
1813 EV_FREQUENT_CHECK; 3348 EV_FREQUENT_CHECK;
1814 feed_reverse (EV_A_ (W)w); 3349 feed_reverse (EV_A_ (W)w);
1815 } 3350 }
1816 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3351 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1817 3352
1818 feed_reverse_done (EV_A_ EV_TIMEOUT); 3353 feed_reverse_done (EV_A_ EV_TIMER);
1819 } 3354 }
1820} 3355}
1821 3356
1822#if EV_PERIODIC_ENABLE 3357#if EV_PERIODIC_ENABLE
3358
3359static void noinline
3360periodic_recalc (EV_P_ ev_periodic *w)
3361{
3362 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3363 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3364
3365 /* the above almost always errs on the low side */
3366 while (at <= ev_rt_now)
3367 {
3368 ev_tstamp nat = at + w->interval;
3369
3370 /* when resolution fails us, we use ev_rt_now */
3371 if (expect_false (nat == at))
3372 {
3373 at = ev_rt_now;
3374 break;
3375 }
3376
3377 at = nat;
3378 }
3379
3380 ev_at (w) = at;
3381}
3382
3383/* make periodics pending */
1823inline_size void 3384inline_size void
1824periodics_reify (EV_P) 3385periodics_reify (EV_P)
1825{ 3386{
1826 EV_FREQUENT_CHECK; 3387 EV_FREQUENT_CHECK;
1827 3388
1828 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3389 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1829 { 3390 {
1830 int feed_count = 0;
1831
1832 do 3391 do
1833 { 3392 {
1834 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3393 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1835 3394
1836 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3395 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1845 ANHE_at_cache (periodics [HEAP0]); 3404 ANHE_at_cache (periodics [HEAP0]);
1846 downheap (periodics, periodiccnt, HEAP0); 3405 downheap (periodics, periodiccnt, HEAP0);
1847 } 3406 }
1848 else if (w->interval) 3407 else if (w->interval)
1849 { 3408 {
1850 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3409 periodic_recalc (EV_A_ w);
1851 /* if next trigger time is not sufficiently in the future, put it there */
1852 /* this might happen because of floating point inexactness */
1853 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854 {
1855 ev_at (w) += w->interval;
1856
1857 /* if interval is unreasonably low we might still have a time in the past */
1858 /* so correct this. this will make the periodic very inexact, but the user */
1859 /* has effectively asked to get triggered more often than possible */
1860 if (ev_at (w) < ev_rt_now)
1861 ev_at (w) = ev_rt_now;
1862 }
1863
1864 ANHE_at_cache (periodics [HEAP0]); 3410 ANHE_at_cache (periodics [HEAP0]);
1865 downheap (periodics, periodiccnt, HEAP0); 3411 downheap (periodics, periodiccnt, HEAP0);
1866 } 3412 }
1867 else 3413 else
1868 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3414 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1874 3420
1875 feed_reverse_done (EV_A_ EV_PERIODIC); 3421 feed_reverse_done (EV_A_ EV_PERIODIC);
1876 } 3422 }
1877} 3423}
1878 3424
3425/* simply recalculate all periodics */
3426/* TODO: maybe ensure that at least one event happens when jumping forward? */
1879static void noinline 3427static void noinline ecb_cold
1880periodics_reschedule (EV_P) 3428periodics_reschedule (EV_P)
1881{ 3429{
1882 int i; 3430 int i;
1883 3431
1884 /* adjust periodics after time jump */ 3432 /* adjust periodics after time jump */
… …
1887 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3435 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1888 3436
1889 if (w->reschedule_cb) 3437 if (w->reschedule_cb)
1890 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3438 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1891 else if (w->interval) 3439 else if (w->interval)
1892 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3440 periodic_recalc (EV_A_ w);
1893 3441
1894 ANHE_at_cache (periodics [i]); 3442 ANHE_at_cache (periodics [i]);
1895 } 3443 }
1896 3444
1897 reheap (periodics, periodiccnt); 3445 reheap (periodics, periodiccnt);
1898} 3446}
1899#endif 3447#endif
1900 3448
3449/* adjust all timers by a given offset */
3450static void noinline ecb_cold
3451timers_reschedule (EV_P_ ev_tstamp adjust)
3452{
3453 int i;
3454
3455 for (i = 0; i < timercnt; ++i)
3456 {
3457 ANHE *he = timers + i + HEAP0;
3458 ANHE_w (*he)->at += adjust;
3459 ANHE_at_cache (*he);
3460 }
3461}
3462
3463/* fetch new monotonic and realtime times from the kernel */
3464/* also detect if there was a timejump, and act accordingly */
1901inline_speed void 3465inline_speed void
1902time_update (EV_P_ ev_tstamp max_block) 3466time_update (EV_P_ ev_tstamp max_block)
1903{ 3467{
1904 int i;
1905
1906#if EV_USE_MONOTONIC 3468#if EV_USE_MONOTONIC
1907 if (expect_true (have_monotonic)) 3469 if (expect_true (have_monotonic))
1908 { 3470 {
3471 int i;
1909 ev_tstamp odiff = rtmn_diff; 3472 ev_tstamp odiff = rtmn_diff;
1910 3473
1911 mn_now = get_clock (); 3474 mn_now = get_clock ();
1912 3475
1913 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3476 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1929 * doesn't hurt either as we only do this on time-jumps or 3492 * doesn't hurt either as we only do this on time-jumps or
1930 * in the unlikely event of having been preempted here. 3493 * in the unlikely event of having been preempted here.
1931 */ 3494 */
1932 for (i = 4; --i; ) 3495 for (i = 4; --i; )
1933 { 3496 {
3497 ev_tstamp diff;
1934 rtmn_diff = ev_rt_now - mn_now; 3498 rtmn_diff = ev_rt_now - mn_now;
1935 3499
3500 diff = odiff - rtmn_diff;
3501
1936 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3502 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1937 return; /* all is well */ 3503 return; /* all is well */
1938 3504
1939 ev_rt_now = ev_time (); 3505 ev_rt_now = ev_time ();
1940 mn_now = get_clock (); 3506 mn_now = get_clock ();
1941 now_floor = mn_now; 3507 now_floor = mn_now;
1942 } 3508 }
1943 3509
3510 /* no timer adjustment, as the monotonic clock doesn't jump */
3511 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1944# if EV_PERIODIC_ENABLE 3512# if EV_PERIODIC_ENABLE
1945 periodics_reschedule (EV_A); 3513 periodics_reschedule (EV_A);
1946# endif 3514# endif
1947 /* no timer adjustment, as the monotonic clock doesn't jump */
1948 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1949 } 3515 }
1950 else 3516 else
1951#endif 3517#endif
1952 { 3518 {
1953 ev_rt_now = ev_time (); 3519 ev_rt_now = ev_time ();
1954 3520
1955 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3521 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1956 { 3522 {
3523 /* adjust timers. this is easy, as the offset is the same for all of them */
3524 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1957#if EV_PERIODIC_ENABLE 3525#if EV_PERIODIC_ENABLE
1958 periodics_reschedule (EV_A); 3526 periodics_reschedule (EV_A);
1959#endif 3527#endif
1960 /* adjust timers. this is easy, as the offset is the same for all of them */
1961 for (i = 0; i < timercnt; ++i)
1962 {
1963 ANHE *he = timers + i + HEAP0;
1964 ANHE_w (*he)->at += ev_rt_now - mn_now;
1965 ANHE_at_cache (*he);
1966 }
1967 } 3528 }
1968 3529
1969 mn_now = ev_rt_now; 3530 mn_now = ev_rt_now;
1970 } 3531 }
1971} 3532}
1972 3533
1973void 3534int
1974ev_ref (EV_P)
1975{
1976 ++activecnt;
1977}
1978
1979void
1980ev_unref (EV_P)
1981{
1982 --activecnt;
1983}
1984
1985void
1986ev_now_update (EV_P)
1987{
1988 time_update (EV_A_ 1e100);
1989}
1990
1991static int loop_done;
1992
1993void
1994ev_loop (EV_P_ int flags) 3535ev_run (EV_P_ int flags)
1995{ 3536{
3537#if EV_FEATURE_API
3538 ++loop_depth;
3539#endif
3540
3541 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3542
1996 loop_done = EVUNLOOP_CANCEL; 3543 loop_done = EVBREAK_CANCEL;
1997 3544
1998 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3545 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1999 3546
2000 do 3547 do
2001 { 3548 {
2002#if EV_VERIFY >= 2 3549#if EV_VERIFY >= 2
2003 ev_loop_verify (EV_A); 3550 ev_verify (EV_A);
2004#endif 3551#endif
2005 3552
2006#ifndef _WIN32 3553#ifndef _WIN32
2007 if (expect_false (curpid)) /* penalise the forking check even more */ 3554 if (expect_false (curpid)) /* penalise the forking check even more */
2008 if (expect_false (getpid () != curpid)) 3555 if (expect_false (getpid () != curpid))
… …
2016 /* we might have forked, so queue fork handlers */ 3563 /* we might have forked, so queue fork handlers */
2017 if (expect_false (postfork)) 3564 if (expect_false (postfork))
2018 if (forkcnt) 3565 if (forkcnt)
2019 { 3566 {
2020 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3567 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2021 call_pending (EV_A); 3568 EV_INVOKE_PENDING;
2022 } 3569 }
2023#endif 3570#endif
2024 3571
3572#if EV_PREPARE_ENABLE
2025 /* queue prepare watchers (and execute them) */ 3573 /* queue prepare watchers (and execute them) */
2026 if (expect_false (preparecnt)) 3574 if (expect_false (preparecnt))
2027 { 3575 {
2028 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3576 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2029 call_pending (EV_A); 3577 EV_INVOKE_PENDING;
2030 } 3578 }
3579#endif
3580
3581 if (expect_false (loop_done))
3582 break;
2031 3583
2032 /* we might have forked, so reify kernel state if necessary */ 3584 /* we might have forked, so reify kernel state if necessary */
2033 if (expect_false (postfork)) 3585 if (expect_false (postfork))
2034 loop_fork (EV_A); 3586 loop_fork (EV_A);
2035 3587
… …
2039 /* calculate blocking time */ 3591 /* calculate blocking time */
2040 { 3592 {
2041 ev_tstamp waittime = 0.; 3593 ev_tstamp waittime = 0.;
2042 ev_tstamp sleeptime = 0.; 3594 ev_tstamp sleeptime = 0.;
2043 3595
3596 /* remember old timestamp for io_blocktime calculation */
3597 ev_tstamp prev_mn_now = mn_now;
3598
3599 /* update time to cancel out callback processing overhead */
3600 time_update (EV_A_ 1e100);
3601
3602 /* from now on, we want a pipe-wake-up */
3603 pipe_write_wanted = 1;
3604
3605 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3606
2044 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3607 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2045 { 3608 {
2046 /* update time to cancel out callback processing overhead */ 3609 waittime = MAX_BLOCKTIME;
2047 time_update (EV_A_ 1e100);
2048 3610
2049 if (timercnt) 3611 if (timercnt)
2050 { 3612 {
2051 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3613 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2052 if (waittime > to) waittime = to; 3614 if (waittime > to) waittime = to;
2053 } 3615 }
2054 3616
2055#if EV_PERIODIC_ENABLE 3617#if EV_PERIODIC_ENABLE
2056 if (periodiccnt) 3618 if (periodiccnt)
2057 { 3619 {
2058 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3620 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2059 if (waittime > to) waittime = to; 3621 if (waittime > to) waittime = to;
2060 } 3622 }
2061#endif 3623#endif
2062 3624
3625 /* don't let timeouts decrease the waittime below timeout_blocktime */
2063 if (expect_false (waittime < timeout_blocktime)) 3626 if (expect_false (waittime < timeout_blocktime))
2064 waittime = timeout_blocktime; 3627 waittime = timeout_blocktime;
2065 3628
2066 sleeptime = waittime - backend_fudge; 3629 /* at this point, we NEED to wait, so we have to ensure */
3630 /* to pass a minimum nonzero value to the backend */
3631 if (expect_false (waittime < backend_mintime))
3632 waittime = backend_mintime;
2067 3633
3634 /* extra check because io_blocktime is commonly 0 */
2068 if (expect_true (sleeptime > io_blocktime)) 3635 if (expect_false (io_blocktime))
2069 sleeptime = io_blocktime;
2070
2071 if (sleeptime)
2072 { 3636 {
3637 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3638
3639 if (sleeptime > waittime - backend_mintime)
3640 sleeptime = waittime - backend_mintime;
3641
3642 if (expect_true (sleeptime > 0.))
3643 {
2073 ev_sleep (sleeptime); 3644 ev_sleep (sleeptime);
2074 waittime -= sleeptime; 3645 waittime -= sleeptime;
3646 }
2075 } 3647 }
2076 } 3648 }
2077 3649
3650#if EV_FEATURE_API
2078 ++loop_count; 3651 ++loop_count;
3652#endif
3653 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2079 backend_poll (EV_A_ waittime); 3654 backend_poll (EV_A_ waittime);
3655 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3656
3657 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3658
3659 ECB_MEMORY_FENCE_ACQUIRE;
3660 if (pipe_write_skipped)
3661 {
3662 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3663 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3664 }
3665
2080 3666
2081 /* update ev_rt_now, do magic */ 3667 /* update ev_rt_now, do magic */
2082 time_update (EV_A_ waittime + sleeptime); 3668 time_update (EV_A_ waittime + sleeptime);
2083 } 3669 }
2084 3670
… …
2091#if EV_IDLE_ENABLE 3677#if EV_IDLE_ENABLE
2092 /* queue idle watchers unless other events are pending */ 3678 /* queue idle watchers unless other events are pending */
2093 idle_reify (EV_A); 3679 idle_reify (EV_A);
2094#endif 3680#endif
2095 3681
3682#if EV_CHECK_ENABLE
2096 /* queue check watchers, to be executed first */ 3683 /* queue check watchers, to be executed first */
2097 if (expect_false (checkcnt)) 3684 if (expect_false (checkcnt))
2098 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3685 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3686#endif
2099 3687
2100 call_pending (EV_A); 3688 EV_INVOKE_PENDING;
2101 } 3689 }
2102 while (expect_true ( 3690 while (expect_true (
2103 activecnt 3691 activecnt
2104 && !loop_done 3692 && !loop_done
2105 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3693 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2106 )); 3694 ));
2107 3695
2108 if (loop_done == EVUNLOOP_ONE) 3696 if (loop_done == EVBREAK_ONE)
2109 loop_done = EVUNLOOP_CANCEL; 3697 loop_done = EVBREAK_CANCEL;
3698
3699#if EV_FEATURE_API
3700 --loop_depth;
3701#endif
3702
3703 return activecnt;
2110} 3704}
2111 3705
2112void 3706void
2113ev_unloop (EV_P_ int how) 3707ev_break (EV_P_ int how) EV_THROW
2114{ 3708{
2115 loop_done = how; 3709 loop_done = how;
2116} 3710}
2117 3711
3712void
3713ev_ref (EV_P) EV_THROW
3714{
3715 ++activecnt;
3716}
3717
3718void
3719ev_unref (EV_P) EV_THROW
3720{
3721 --activecnt;
3722}
3723
3724void
3725ev_now_update (EV_P) EV_THROW
3726{
3727 time_update (EV_A_ 1e100);
3728}
3729
3730void
3731ev_suspend (EV_P) EV_THROW
3732{
3733 ev_now_update (EV_A);
3734}
3735
3736void
3737ev_resume (EV_P) EV_THROW
3738{
3739 ev_tstamp mn_prev = mn_now;
3740
3741 ev_now_update (EV_A);
3742 timers_reschedule (EV_A_ mn_now - mn_prev);
3743#if EV_PERIODIC_ENABLE
3744 /* TODO: really do this? */
3745 periodics_reschedule (EV_A);
3746#endif
3747}
3748
2118/*****************************************************************************/ 3749/*****************************************************************************/
3750/* singly-linked list management, used when the expected list length is short */
2119 3751
2120inline_size void 3752inline_size void
2121wlist_add (WL *head, WL elem) 3753wlist_add (WL *head, WL elem)
2122{ 3754{
2123 elem->next = *head; 3755 elem->next = *head;
… …
2127inline_size void 3759inline_size void
2128wlist_del (WL *head, WL elem) 3760wlist_del (WL *head, WL elem)
2129{ 3761{
2130 while (*head) 3762 while (*head)
2131 { 3763 {
2132 if (*head == elem) 3764 if (expect_true (*head == elem))
2133 { 3765 {
2134 *head = elem->next; 3766 *head = elem->next;
2135 return; 3767 break;
2136 } 3768 }
2137 3769
2138 head = &(*head)->next; 3770 head = &(*head)->next;
2139 } 3771 }
2140} 3772}
2141 3773
3774/* internal, faster, version of ev_clear_pending */
2142inline_speed void 3775inline_speed void
2143clear_pending (EV_P_ W w) 3776clear_pending (EV_P_ W w)
2144{ 3777{
2145 if (w->pending) 3778 if (w->pending)
2146 { 3779 {
2147 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3780 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2148 w->pending = 0; 3781 w->pending = 0;
2149 } 3782 }
2150} 3783}
2151 3784
2152int 3785int
2153ev_clear_pending (EV_P_ void *w) 3786ev_clear_pending (EV_P_ void *w) EV_THROW
2154{ 3787{
2155 W w_ = (W)w; 3788 W w_ = (W)w;
2156 int pending = w_->pending; 3789 int pending = w_->pending;
2157 3790
2158 if (expect_true (pending)) 3791 if (expect_true (pending))
2159 { 3792 {
2160 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3793 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3794 p->w = (W)&pending_w;
2161 w_->pending = 0; 3795 w_->pending = 0;
2162 p->w = 0;
2163 return p->events; 3796 return p->events;
2164 } 3797 }
2165 else 3798 else
2166 return 0; 3799 return 0;
2167} 3800}
2168 3801
2169inline_size void 3802inline_size void
2170pri_adjust (EV_P_ W w) 3803pri_adjust (EV_P_ W w)
2171{ 3804{
2172 int pri = w->priority; 3805 int pri = ev_priority (w);
2173 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3806 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2174 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3807 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2175 w->priority = pri; 3808 ev_set_priority (w, pri);
2176} 3809}
2177 3810
2178inline_speed void 3811inline_speed void
2179ev_start (EV_P_ W w, int active) 3812ev_start (EV_P_ W w, int active)
2180{ 3813{
… …
2191} 3824}
2192 3825
2193/*****************************************************************************/ 3826/*****************************************************************************/
2194 3827
2195void noinline 3828void noinline
2196ev_io_start (EV_P_ ev_io *w) 3829ev_io_start (EV_P_ ev_io *w) EV_THROW
2197{ 3830{
2198 int fd = w->fd; 3831 int fd = w->fd;
2199 3832
2200 if (expect_false (ev_is_active (w))) 3833 if (expect_false (ev_is_active (w)))
2201 return; 3834 return;
2202 3835
2203 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 3836 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2204 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3837 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2205 3838
2206 EV_FREQUENT_CHECK; 3839 EV_FREQUENT_CHECK;
2207 3840
2208 ev_start (EV_A_ (W)w, 1); 3841 ev_start (EV_A_ (W)w, 1);
2209 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3842 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2210 wlist_add (&anfds[fd].head, (WL)w); 3843 wlist_add (&anfds[fd].head, (WL)w);
2211 3844
3845 /* common bug, apparently */
3846 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3847
2212 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1); 3848 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2213 w->events &= ~EV__IOFDSET; 3849 w->events &= ~EV__IOFDSET;
2214 3850
2215 EV_FREQUENT_CHECK; 3851 EV_FREQUENT_CHECK;
2216} 3852}
2217 3853
2218void noinline 3854void noinline
2219ev_io_stop (EV_P_ ev_io *w) 3855ev_io_stop (EV_P_ ev_io *w) EV_THROW
2220{ 3856{
2221 clear_pending (EV_A_ (W)w); 3857 clear_pending (EV_A_ (W)w);
2222 if (expect_false (!ev_is_active (w))) 3858 if (expect_false (!ev_is_active (w)))
2223 return; 3859 return;
2224 3860
… …
2227 EV_FREQUENT_CHECK; 3863 EV_FREQUENT_CHECK;
2228 3864
2229 wlist_del (&anfds[w->fd].head, (WL)w); 3865 wlist_del (&anfds[w->fd].head, (WL)w);
2230 ev_stop (EV_A_ (W)w); 3866 ev_stop (EV_A_ (W)w);
2231 3867
2232 fd_change (EV_A_ w->fd, 1); 3868 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2233 3869
2234 EV_FREQUENT_CHECK; 3870 EV_FREQUENT_CHECK;
2235} 3871}
2236 3872
2237void noinline 3873void noinline
2238ev_timer_start (EV_P_ ev_timer *w) 3874ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2239{ 3875{
2240 if (expect_false (ev_is_active (w))) 3876 if (expect_false (ev_is_active (w)))
2241 return; 3877 return;
2242 3878
2243 ev_at (w) += mn_now; 3879 ev_at (w) += mn_now;
… …
2257 3893
2258 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3894 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2259} 3895}
2260 3896
2261void noinline 3897void noinline
2262ev_timer_stop (EV_P_ ev_timer *w) 3898ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2263{ 3899{
2264 clear_pending (EV_A_ (W)w); 3900 clear_pending (EV_A_ (W)w);
2265 if (expect_false (!ev_is_active (w))) 3901 if (expect_false (!ev_is_active (w)))
2266 return; 3902 return;
2267 3903
… …
2279 timers [active] = timers [timercnt + HEAP0]; 3915 timers [active] = timers [timercnt + HEAP0];
2280 adjustheap (timers, timercnt, active); 3916 adjustheap (timers, timercnt, active);
2281 } 3917 }
2282 } 3918 }
2283 3919
2284 EV_FREQUENT_CHECK;
2285
2286 ev_at (w) -= mn_now; 3920 ev_at (w) -= mn_now;
2287 3921
2288 ev_stop (EV_A_ (W)w); 3922 ev_stop (EV_A_ (W)w);
3923
3924 EV_FREQUENT_CHECK;
2289} 3925}
2290 3926
2291void noinline 3927void noinline
2292ev_timer_again (EV_P_ ev_timer *w) 3928ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2293{ 3929{
2294 EV_FREQUENT_CHECK; 3930 EV_FREQUENT_CHECK;
3931
3932 clear_pending (EV_A_ (W)w);
2295 3933
2296 if (ev_is_active (w)) 3934 if (ev_is_active (w))
2297 { 3935 {
2298 if (w->repeat) 3936 if (w->repeat)
2299 { 3937 {
… …
2311 } 3949 }
2312 3950
2313 EV_FREQUENT_CHECK; 3951 EV_FREQUENT_CHECK;
2314} 3952}
2315 3953
3954ev_tstamp
3955ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3956{
3957 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3958}
3959
2316#if EV_PERIODIC_ENABLE 3960#if EV_PERIODIC_ENABLE
2317void noinline 3961void noinline
2318ev_periodic_start (EV_P_ ev_periodic *w) 3962ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2319{ 3963{
2320 if (expect_false (ev_is_active (w))) 3964 if (expect_false (ev_is_active (w)))
2321 return; 3965 return;
2322 3966
2323 if (w->reschedule_cb) 3967 if (w->reschedule_cb)
2324 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3968 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2325 else if (w->interval) 3969 else if (w->interval)
2326 { 3970 {
2327 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3971 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2328 /* this formula differs from the one in periodic_reify because we do not always round up */ 3972 periodic_recalc (EV_A_ w);
2329 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2330 } 3973 }
2331 else 3974 else
2332 ev_at (w) = w->offset; 3975 ev_at (w) = w->offset;
2333 3976
2334 EV_FREQUENT_CHECK; 3977 EV_FREQUENT_CHECK;
… …
2344 3987
2345 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3988 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2346} 3989}
2347 3990
2348void noinline 3991void noinline
2349ev_periodic_stop (EV_P_ ev_periodic *w) 3992ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2350{ 3993{
2351 clear_pending (EV_A_ (W)w); 3994 clear_pending (EV_A_ (W)w);
2352 if (expect_false (!ev_is_active (w))) 3995 if (expect_false (!ev_is_active (w)))
2353 return; 3996 return;
2354 3997
… …
2366 periodics [active] = periodics [periodiccnt + HEAP0]; 4009 periodics [active] = periodics [periodiccnt + HEAP0];
2367 adjustheap (periodics, periodiccnt, active); 4010 adjustheap (periodics, periodiccnt, active);
2368 } 4011 }
2369 } 4012 }
2370 4013
2371 EV_FREQUENT_CHECK;
2372
2373 ev_stop (EV_A_ (W)w); 4014 ev_stop (EV_A_ (W)w);
4015
4016 EV_FREQUENT_CHECK;
2374} 4017}
2375 4018
2376void noinline 4019void noinline
2377ev_periodic_again (EV_P_ ev_periodic *w) 4020ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2378{ 4021{
2379 /* TODO: use adjustheap and recalculation */ 4022 /* TODO: use adjustheap and recalculation */
2380 ev_periodic_stop (EV_A_ w); 4023 ev_periodic_stop (EV_A_ w);
2381 ev_periodic_start (EV_A_ w); 4024 ev_periodic_start (EV_A_ w);
2382} 4025}
… …
2384 4027
2385#ifndef SA_RESTART 4028#ifndef SA_RESTART
2386# define SA_RESTART 0 4029# define SA_RESTART 0
2387#endif 4030#endif
2388 4031
4032#if EV_SIGNAL_ENABLE
4033
2389void noinline 4034void noinline
2390ev_signal_start (EV_P_ ev_signal *w) 4035ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2391{ 4036{
2392#if EV_MULTIPLICITY
2393 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2394#endif
2395 if (expect_false (ev_is_active (w))) 4037 if (expect_false (ev_is_active (w)))
2396 return; 4038 return;
2397 4039
2398 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 4040 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2399 4041
2400 evpipe_init (EV_A); 4042#if EV_MULTIPLICITY
4043 assert (("libev: a signal must not be attached to two different loops",
4044 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2401 4045
2402 EV_FREQUENT_CHECK; 4046 signals [w->signum - 1].loop = EV_A;
4047 ECB_MEMORY_FENCE_RELEASE;
4048#endif
2403 4049
4050 EV_FREQUENT_CHECK;
4051
4052#if EV_USE_SIGNALFD
4053 if (sigfd == -2)
2404 { 4054 {
2405#ifndef _WIN32 4055 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2406 sigset_t full, prev; 4056 if (sigfd < 0 && errno == EINVAL)
2407 sigfillset (&full); 4057 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2408 sigprocmask (SIG_SETMASK, &full, &prev);
2409#endif
2410 4058
2411 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 4059 if (sigfd >= 0)
4060 {
4061 fd_intern (sigfd); /* doing it twice will not hurt */
2412 4062
2413#ifndef _WIN32 4063 sigemptyset (&sigfd_set);
2414 sigprocmask (SIG_SETMASK, &prev, 0); 4064
2415#endif 4065 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4066 ev_set_priority (&sigfd_w, EV_MAXPRI);
4067 ev_io_start (EV_A_ &sigfd_w);
4068 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4069 }
2416 } 4070 }
4071
4072 if (sigfd >= 0)
4073 {
4074 /* TODO: check .head */
4075 sigaddset (&sigfd_set, w->signum);
4076 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4077
4078 signalfd (sigfd, &sigfd_set, 0);
4079 }
4080#endif
2417 4081
2418 ev_start (EV_A_ (W)w, 1); 4082 ev_start (EV_A_ (W)w, 1);
2419 wlist_add (&signals [w->signum - 1].head, (WL)w); 4083 wlist_add (&signals [w->signum - 1].head, (WL)w);
2420 4084
2421 if (!((WL)w)->next) 4085 if (!((WL)w)->next)
4086# if EV_USE_SIGNALFD
4087 if (sigfd < 0) /*TODO*/
4088# endif
2422 { 4089 {
2423#if _WIN32 4090# ifdef _WIN32
4091 evpipe_init (EV_A);
4092
2424 signal (w->signum, ev_sighandler); 4093 signal (w->signum, ev_sighandler);
2425#else 4094# else
2426 struct sigaction sa; 4095 struct sigaction sa;
4096
4097 evpipe_init (EV_A);
4098
2427 sa.sa_handler = ev_sighandler; 4099 sa.sa_handler = ev_sighandler;
2428 sigfillset (&sa.sa_mask); 4100 sigfillset (&sa.sa_mask);
2429 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4101 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2430 sigaction (w->signum, &sa, 0); 4102 sigaction (w->signum, &sa, 0);
4103
4104 if (origflags & EVFLAG_NOSIGMASK)
4105 {
4106 sigemptyset (&sa.sa_mask);
4107 sigaddset (&sa.sa_mask, w->signum);
4108 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4109 }
2431#endif 4110#endif
2432 } 4111 }
2433 4112
2434 EV_FREQUENT_CHECK; 4113 EV_FREQUENT_CHECK;
2435} 4114}
2436 4115
2437void noinline 4116void noinline
2438ev_signal_stop (EV_P_ ev_signal *w) 4117ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2439{ 4118{
2440 clear_pending (EV_A_ (W)w); 4119 clear_pending (EV_A_ (W)w);
2441 if (expect_false (!ev_is_active (w))) 4120 if (expect_false (!ev_is_active (w)))
2442 return; 4121 return;
2443 4122
… …
2445 4124
2446 wlist_del (&signals [w->signum - 1].head, (WL)w); 4125 wlist_del (&signals [w->signum - 1].head, (WL)w);
2447 ev_stop (EV_A_ (W)w); 4126 ev_stop (EV_A_ (W)w);
2448 4127
2449 if (!signals [w->signum - 1].head) 4128 if (!signals [w->signum - 1].head)
4129 {
4130#if EV_MULTIPLICITY
4131 signals [w->signum - 1].loop = 0; /* unattach from signal */
4132#endif
4133#if EV_USE_SIGNALFD
4134 if (sigfd >= 0)
4135 {
4136 sigset_t ss;
4137
4138 sigemptyset (&ss);
4139 sigaddset (&ss, w->signum);
4140 sigdelset (&sigfd_set, w->signum);
4141
4142 signalfd (sigfd, &sigfd_set, 0);
4143 sigprocmask (SIG_UNBLOCK, &ss, 0);
4144 }
4145 else
4146#endif
2450 signal (w->signum, SIG_DFL); 4147 signal (w->signum, SIG_DFL);
4148 }
2451 4149
2452 EV_FREQUENT_CHECK; 4150 EV_FREQUENT_CHECK;
2453} 4151}
4152
4153#endif
4154
4155#if EV_CHILD_ENABLE
2454 4156
2455void 4157void
2456ev_child_start (EV_P_ ev_child *w) 4158ev_child_start (EV_P_ ev_child *w) EV_THROW
2457{ 4159{
2458#if EV_MULTIPLICITY 4160#if EV_MULTIPLICITY
2459 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4161 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2460#endif 4162#endif
2461 if (expect_false (ev_is_active (w))) 4163 if (expect_false (ev_is_active (w)))
2462 return; 4164 return;
2463 4165
2464 EV_FREQUENT_CHECK; 4166 EV_FREQUENT_CHECK;
2465 4167
2466 ev_start (EV_A_ (W)w, 1); 4168 ev_start (EV_A_ (W)w, 1);
2467 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4169 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2468 4170
2469 EV_FREQUENT_CHECK; 4171 EV_FREQUENT_CHECK;
2470} 4172}
2471 4173
2472void 4174void
2473ev_child_stop (EV_P_ ev_child *w) 4175ev_child_stop (EV_P_ ev_child *w) EV_THROW
2474{ 4176{
2475 clear_pending (EV_A_ (W)w); 4177 clear_pending (EV_A_ (W)w);
2476 if (expect_false (!ev_is_active (w))) 4178 if (expect_false (!ev_is_active (w)))
2477 return; 4179 return;
2478 4180
2479 EV_FREQUENT_CHECK; 4181 EV_FREQUENT_CHECK;
2480 4182
2481 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4183 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2482 ev_stop (EV_A_ (W)w); 4184 ev_stop (EV_A_ (W)w);
2483 4185
2484 EV_FREQUENT_CHECK; 4186 EV_FREQUENT_CHECK;
2485} 4187}
4188
4189#endif
2486 4190
2487#if EV_STAT_ENABLE 4191#if EV_STAT_ENABLE
2488 4192
2489# ifdef _WIN32 4193# ifdef _WIN32
2490# undef lstat 4194# undef lstat
… …
2496#define MIN_STAT_INTERVAL 0.1074891 4200#define MIN_STAT_INTERVAL 0.1074891
2497 4201
2498static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4202static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2499 4203
2500#if EV_USE_INOTIFY 4204#if EV_USE_INOTIFY
2501# define EV_INOTIFY_BUFSIZE 8192 4205
4206/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4207# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2502 4208
2503static void noinline 4209static void noinline
2504infy_add (EV_P_ ev_stat *w) 4210infy_add (EV_P_ ev_stat *w)
2505{ 4211{
2506 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); 4212 w->wd = inotify_add_watch (fs_fd, w->path,
4213 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4214 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4215 | IN_DONT_FOLLOW | IN_MASK_ADD);
2507 4216
2508 if (w->wd < 0) 4217 if (w->wd >= 0)
4218 {
4219 struct statfs sfs;
4220
4221 /* now local changes will be tracked by inotify, but remote changes won't */
4222 /* unless the filesystem is known to be local, we therefore still poll */
4223 /* also do poll on <2.6.25, but with normal frequency */
4224
4225 if (!fs_2625)
4226 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4227 else if (!statfs (w->path, &sfs)
4228 && (sfs.f_type == 0x1373 /* devfs */
4229 || sfs.f_type == 0x4006 /* fat */
4230 || sfs.f_type == 0x4d44 /* msdos */
4231 || sfs.f_type == 0xEF53 /* ext2/3 */
4232 || sfs.f_type == 0x72b6 /* jffs2 */
4233 || sfs.f_type == 0x858458f6 /* ramfs */
4234 || sfs.f_type == 0x5346544e /* ntfs */
4235 || sfs.f_type == 0x3153464a /* jfs */
4236 || sfs.f_type == 0x9123683e /* btrfs */
4237 || sfs.f_type == 0x52654973 /* reiser3 */
4238 || sfs.f_type == 0x01021994 /* tmpfs */
4239 || sfs.f_type == 0x58465342 /* xfs */))
4240 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4241 else
4242 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2509 { 4243 }
4244 else
4245 {
4246 /* can't use inotify, continue to stat */
2510 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4247 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2511 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2512 4248
2513 /* monitor some parent directory for speedup hints */ 4249 /* if path is not there, monitor some parent directory for speedup hints */
2514 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 4250 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2515 /* but an efficiency issue only */ 4251 /* but an efficiency issue only */
2516 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4252 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2517 { 4253 {
2518 char path [4096]; 4254 char path [4096];
… …
2528 if (!pend || pend == path) 4264 if (!pend || pend == path)
2529 break; 4265 break;
2530 4266
2531 *pend = 0; 4267 *pend = 0;
2532 w->wd = inotify_add_watch (fs_fd, path, mask); 4268 w->wd = inotify_add_watch (fs_fd, path, mask);
2533 } 4269 }
2534 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4270 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2535 } 4271 }
2536 } 4272 }
2537 4273
2538 if (w->wd >= 0) 4274 if (w->wd >= 0)
2539 {
2540 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4275 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2541 4276
2542 /* now local changes will be tracked by inotify, but remote changes won't */ 4277 /* now re-arm timer, if required */
2543 /* unless the filesystem it known to be local, we therefore still poll */ 4278 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2544 /* also do poll on <2.6.25, but with normal frequency */
2545 struct statfs sfs;
2546
2547 if (fs_2625 && !statfs (w->path, &sfs))
2548 if (sfs.f_type == 0x1373 /* devfs */
2549 || sfs.f_type == 0xEF53 /* ext2/3 */
2550 || sfs.f_type == 0x3153464a /* jfs */
2551 || sfs.f_type == 0x52654973 /* reiser3 */
2552 || sfs.f_type == 0x01021994 /* tempfs */
2553 || sfs.f_type == 0x58465342 /* xfs */)
2554 return;
2555
2556 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2557 ev_timer_again (EV_A_ &w->timer); 4279 ev_timer_again (EV_A_ &w->timer);
2558 } 4280 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2559} 4281}
2560 4282
2561static void noinline 4283static void noinline
2562infy_del (EV_P_ ev_stat *w) 4284infy_del (EV_P_ ev_stat *w)
2563{ 4285{
… …
2566 4288
2567 if (wd < 0) 4289 if (wd < 0)
2568 return; 4290 return;
2569 4291
2570 w->wd = -2; 4292 w->wd = -2;
2571 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4293 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2572 wlist_del (&fs_hash [slot].head, (WL)w); 4294 wlist_del (&fs_hash [slot].head, (WL)w);
2573 4295
2574 /* remove this watcher, if others are watching it, they will rearm */ 4296 /* remove this watcher, if others are watching it, they will rearm */
2575 inotify_rm_watch (fs_fd, wd); 4297 inotify_rm_watch (fs_fd, wd);
2576} 4298}
… …
2578static void noinline 4300static void noinline
2579infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4301infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2580{ 4302{
2581 if (slot < 0) 4303 if (slot < 0)
2582 /* overflow, need to check for all hash slots */ 4304 /* overflow, need to check for all hash slots */
2583 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4305 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2584 infy_wd (EV_A_ slot, wd, ev); 4306 infy_wd (EV_A_ slot, wd, ev);
2585 else 4307 else
2586 { 4308 {
2587 WL w_; 4309 WL w_;
2588 4310
2589 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4311 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2590 { 4312 {
2591 ev_stat *w = (ev_stat *)w_; 4313 ev_stat *w = (ev_stat *)w_;
2592 w_ = w_->next; /* lets us remove this watcher and all before it */ 4314 w_ = w_->next; /* lets us remove this watcher and all before it */
2593 4315
2594 if (w->wd == wd || wd == -1) 4316 if (w->wd == wd || wd == -1)
2595 { 4317 {
2596 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4318 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2597 { 4319 {
2598 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4320 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2599 w->wd = -1; 4321 w->wd = -1;
2600 infy_add (EV_A_ w); /* re-add, no matter what */ 4322 infy_add (EV_A_ w); /* re-add, no matter what */
2601 } 4323 }
2602 4324
2603 stat_timer_cb (EV_A_ &w->timer, 0); 4325 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2608 4330
2609static void 4331static void
2610infy_cb (EV_P_ ev_io *w, int revents) 4332infy_cb (EV_P_ ev_io *w, int revents)
2611{ 4333{
2612 char buf [EV_INOTIFY_BUFSIZE]; 4334 char buf [EV_INOTIFY_BUFSIZE];
2613 struct inotify_event *ev = (struct inotify_event *)buf;
2614 int ofs; 4335 int ofs;
2615 int len = read (fs_fd, buf, sizeof (buf)); 4336 int len = read (fs_fd, buf, sizeof (buf));
2616 4337
2617 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4338 for (ofs = 0; ofs < len; )
4339 {
4340 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2618 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4341 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4342 ofs += sizeof (struct inotify_event) + ev->len;
4343 }
2619} 4344}
2620 4345
2621inline_size void 4346inline_size void ecb_cold
2622check_2625 (EV_P) 4347ev_check_2625 (EV_P)
2623{ 4348{
2624 /* kernels < 2.6.25 are borked 4349 /* kernels < 2.6.25 are borked
2625 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4350 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2626 */ 4351 */
2627 struct utsname buf; 4352 if (ev_linux_version () < 0x020619)
2628 int major, minor, micro;
2629
2630 if (uname (&buf))
2631 return; 4353 return;
2632 4354
2633 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2634 return;
2635
2636 if (major < 2
2637 || (major == 2 && minor < 6)
2638 || (major == 2 && minor == 6 && micro < 25))
2639 return;
2640
2641 fs_2625 = 1; 4355 fs_2625 = 1;
4356}
4357
4358inline_size int
4359infy_newfd (void)
4360{
4361#if defined IN_CLOEXEC && defined IN_NONBLOCK
4362 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4363 if (fd >= 0)
4364 return fd;
4365#endif
4366 return inotify_init ();
2642} 4367}
2643 4368
2644inline_size void 4369inline_size void
2645infy_init (EV_P) 4370infy_init (EV_P)
2646{ 4371{
2647 if (fs_fd != -2) 4372 if (fs_fd != -2)
2648 return; 4373 return;
2649 4374
2650 fs_fd = -1; 4375 fs_fd = -1;
2651 4376
2652 check_2625 (EV_A); 4377 ev_check_2625 (EV_A);
2653 4378
2654 fs_fd = inotify_init (); 4379 fs_fd = infy_newfd ();
2655 4380
2656 if (fs_fd >= 0) 4381 if (fs_fd >= 0)
2657 { 4382 {
4383 fd_intern (fs_fd);
2658 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4384 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2659 ev_set_priority (&fs_w, EV_MAXPRI); 4385 ev_set_priority (&fs_w, EV_MAXPRI);
2660 ev_io_start (EV_A_ &fs_w); 4386 ev_io_start (EV_A_ &fs_w);
4387 ev_unref (EV_A);
2661 } 4388 }
2662} 4389}
2663 4390
2664inline_size void 4391inline_size void
2665infy_fork (EV_P) 4392infy_fork (EV_P)
… …
2667 int slot; 4394 int slot;
2668 4395
2669 if (fs_fd < 0) 4396 if (fs_fd < 0)
2670 return; 4397 return;
2671 4398
4399 ev_ref (EV_A);
4400 ev_io_stop (EV_A_ &fs_w);
2672 close (fs_fd); 4401 close (fs_fd);
2673 fs_fd = inotify_init (); 4402 fs_fd = infy_newfd ();
2674 4403
4404 if (fs_fd >= 0)
4405 {
4406 fd_intern (fs_fd);
4407 ev_io_set (&fs_w, fs_fd, EV_READ);
4408 ev_io_start (EV_A_ &fs_w);
4409 ev_unref (EV_A);
4410 }
4411
2675 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4412 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2676 { 4413 {
2677 WL w_ = fs_hash [slot].head; 4414 WL w_ = fs_hash [slot].head;
2678 fs_hash [slot].head = 0; 4415 fs_hash [slot].head = 0;
2679 4416
2680 while (w_) 4417 while (w_)
… …
2685 w->wd = -1; 4422 w->wd = -1;
2686 4423
2687 if (fs_fd >= 0) 4424 if (fs_fd >= 0)
2688 infy_add (EV_A_ w); /* re-add, no matter what */ 4425 infy_add (EV_A_ w); /* re-add, no matter what */
2689 else 4426 else
4427 {
4428 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4429 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2690 ev_timer_again (EV_A_ &w->timer); 4430 ev_timer_again (EV_A_ &w->timer);
4431 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4432 }
2691 } 4433 }
2692 } 4434 }
2693} 4435}
2694 4436
2695#endif 4437#endif
… …
2699#else 4441#else
2700# define EV_LSTAT(p,b) lstat (p, b) 4442# define EV_LSTAT(p,b) lstat (p, b)
2701#endif 4443#endif
2702 4444
2703void 4445void
2704ev_stat_stat (EV_P_ ev_stat *w) 4446ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2705{ 4447{
2706 if (lstat (w->path, &w->attr) < 0) 4448 if (lstat (w->path, &w->attr) < 0)
2707 w->attr.st_nlink = 0; 4449 w->attr.st_nlink = 0;
2708 else if (!w->attr.st_nlink) 4450 else if (!w->attr.st_nlink)
2709 w->attr.st_nlink = 1; 4451 w->attr.st_nlink = 1;
… …
2712static void noinline 4454static void noinline
2713stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4455stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2714{ 4456{
2715 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4457 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2716 4458
2717 /* we copy this here each the time so that */ 4459 ev_statdata prev = w->attr;
2718 /* prev has the old value when the callback gets invoked */
2719 w->prev = w->attr;
2720 ev_stat_stat (EV_A_ w); 4460 ev_stat_stat (EV_A_ w);
2721 4461
2722 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4462 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2723 if ( 4463 if (
2724 w->prev.st_dev != w->attr.st_dev 4464 prev.st_dev != w->attr.st_dev
2725 || w->prev.st_ino != w->attr.st_ino 4465 || prev.st_ino != w->attr.st_ino
2726 || w->prev.st_mode != w->attr.st_mode 4466 || prev.st_mode != w->attr.st_mode
2727 || w->prev.st_nlink != w->attr.st_nlink 4467 || prev.st_nlink != w->attr.st_nlink
2728 || w->prev.st_uid != w->attr.st_uid 4468 || prev.st_uid != w->attr.st_uid
2729 || w->prev.st_gid != w->attr.st_gid 4469 || prev.st_gid != w->attr.st_gid
2730 || w->prev.st_rdev != w->attr.st_rdev 4470 || prev.st_rdev != w->attr.st_rdev
2731 || w->prev.st_size != w->attr.st_size 4471 || prev.st_size != w->attr.st_size
2732 || w->prev.st_atime != w->attr.st_atime 4472 || prev.st_atime != w->attr.st_atime
2733 || w->prev.st_mtime != w->attr.st_mtime 4473 || prev.st_mtime != w->attr.st_mtime
2734 || w->prev.st_ctime != w->attr.st_ctime 4474 || prev.st_ctime != w->attr.st_ctime
2735 ) { 4475 ) {
4476 /* we only update w->prev on actual differences */
4477 /* in case we test more often than invoke the callback, */
4478 /* to ensure that prev is always different to attr */
4479 w->prev = prev;
4480
2736 #if EV_USE_INOTIFY 4481 #if EV_USE_INOTIFY
2737 if (fs_fd >= 0) 4482 if (fs_fd >= 0)
2738 { 4483 {
2739 infy_del (EV_A_ w); 4484 infy_del (EV_A_ w);
2740 infy_add (EV_A_ w); 4485 infy_add (EV_A_ w);
… …
2745 ev_feed_event (EV_A_ w, EV_STAT); 4490 ev_feed_event (EV_A_ w, EV_STAT);
2746 } 4491 }
2747} 4492}
2748 4493
2749void 4494void
2750ev_stat_start (EV_P_ ev_stat *w) 4495ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2751{ 4496{
2752 if (expect_false (ev_is_active (w))) 4497 if (expect_false (ev_is_active (w)))
2753 return; 4498 return;
2754 4499
2755 ev_stat_stat (EV_A_ w); 4500 ev_stat_stat (EV_A_ w);
… …
2765 4510
2766 if (fs_fd >= 0) 4511 if (fs_fd >= 0)
2767 infy_add (EV_A_ w); 4512 infy_add (EV_A_ w);
2768 else 4513 else
2769#endif 4514#endif
4515 {
2770 ev_timer_again (EV_A_ &w->timer); 4516 ev_timer_again (EV_A_ &w->timer);
4517 ev_unref (EV_A);
4518 }
2771 4519
2772 ev_start (EV_A_ (W)w, 1); 4520 ev_start (EV_A_ (W)w, 1);
2773 4521
2774 EV_FREQUENT_CHECK; 4522 EV_FREQUENT_CHECK;
2775} 4523}
2776 4524
2777void 4525void
2778ev_stat_stop (EV_P_ ev_stat *w) 4526ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2779{ 4527{
2780 clear_pending (EV_A_ (W)w); 4528 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w))) 4529 if (expect_false (!ev_is_active (w)))
2782 return; 4530 return;
2783 4531
2784 EV_FREQUENT_CHECK; 4532 EV_FREQUENT_CHECK;
2785 4533
2786#if EV_USE_INOTIFY 4534#if EV_USE_INOTIFY
2787 infy_del (EV_A_ w); 4535 infy_del (EV_A_ w);
2788#endif 4536#endif
4537
4538 if (ev_is_active (&w->timer))
4539 {
4540 ev_ref (EV_A);
2789 ev_timer_stop (EV_A_ &w->timer); 4541 ev_timer_stop (EV_A_ &w->timer);
4542 }
2790 4543
2791 ev_stop (EV_A_ (W)w); 4544 ev_stop (EV_A_ (W)w);
2792 4545
2793 EV_FREQUENT_CHECK; 4546 EV_FREQUENT_CHECK;
2794} 4547}
2795#endif 4548#endif
2796 4549
2797#if EV_IDLE_ENABLE 4550#if EV_IDLE_ENABLE
2798void 4551void
2799ev_idle_start (EV_P_ ev_idle *w) 4552ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2800{ 4553{
2801 if (expect_false (ev_is_active (w))) 4554 if (expect_false (ev_is_active (w)))
2802 return; 4555 return;
2803 4556
2804 pri_adjust (EV_A_ (W)w); 4557 pri_adjust (EV_A_ (W)w);
… …
2817 4570
2818 EV_FREQUENT_CHECK; 4571 EV_FREQUENT_CHECK;
2819} 4572}
2820 4573
2821void 4574void
2822ev_idle_stop (EV_P_ ev_idle *w) 4575ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2823{ 4576{
2824 clear_pending (EV_A_ (W)w); 4577 clear_pending (EV_A_ (W)w);
2825 if (expect_false (!ev_is_active (w))) 4578 if (expect_false (!ev_is_active (w)))
2826 return; 4579 return;
2827 4580
… …
2839 4592
2840 EV_FREQUENT_CHECK; 4593 EV_FREQUENT_CHECK;
2841} 4594}
2842#endif 4595#endif
2843 4596
4597#if EV_PREPARE_ENABLE
2844void 4598void
2845ev_prepare_start (EV_P_ ev_prepare *w) 4599ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2846{ 4600{
2847 if (expect_false (ev_is_active (w))) 4601 if (expect_false (ev_is_active (w)))
2848 return; 4602 return;
2849 4603
2850 EV_FREQUENT_CHECK; 4604 EV_FREQUENT_CHECK;
… …
2855 4609
2856 EV_FREQUENT_CHECK; 4610 EV_FREQUENT_CHECK;
2857} 4611}
2858 4612
2859void 4613void
2860ev_prepare_stop (EV_P_ ev_prepare *w) 4614ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2861{ 4615{
2862 clear_pending (EV_A_ (W)w); 4616 clear_pending (EV_A_ (W)w);
2863 if (expect_false (!ev_is_active (w))) 4617 if (expect_false (!ev_is_active (w)))
2864 return; 4618 return;
2865 4619
… …
2874 4628
2875 ev_stop (EV_A_ (W)w); 4629 ev_stop (EV_A_ (W)w);
2876 4630
2877 EV_FREQUENT_CHECK; 4631 EV_FREQUENT_CHECK;
2878} 4632}
4633#endif
2879 4634
4635#if EV_CHECK_ENABLE
2880void 4636void
2881ev_check_start (EV_P_ ev_check *w) 4637ev_check_start (EV_P_ ev_check *w) EV_THROW
2882{ 4638{
2883 if (expect_false (ev_is_active (w))) 4639 if (expect_false (ev_is_active (w)))
2884 return; 4640 return;
2885 4641
2886 EV_FREQUENT_CHECK; 4642 EV_FREQUENT_CHECK;
… …
2891 4647
2892 EV_FREQUENT_CHECK; 4648 EV_FREQUENT_CHECK;
2893} 4649}
2894 4650
2895void 4651void
2896ev_check_stop (EV_P_ ev_check *w) 4652ev_check_stop (EV_P_ ev_check *w) EV_THROW
2897{ 4653{
2898 clear_pending (EV_A_ (W)w); 4654 clear_pending (EV_A_ (W)w);
2899 if (expect_false (!ev_is_active (w))) 4655 if (expect_false (!ev_is_active (w)))
2900 return; 4656 return;
2901 4657
… …
2910 4666
2911 ev_stop (EV_A_ (W)w); 4667 ev_stop (EV_A_ (W)w);
2912 4668
2913 EV_FREQUENT_CHECK; 4669 EV_FREQUENT_CHECK;
2914} 4670}
4671#endif
2915 4672
2916#if EV_EMBED_ENABLE 4673#if EV_EMBED_ENABLE
2917void noinline 4674void noinline
2918ev_embed_sweep (EV_P_ ev_embed *w) 4675ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2919{ 4676{
2920 ev_loop (w->other, EVLOOP_NONBLOCK); 4677 ev_run (w->other, EVRUN_NOWAIT);
2921} 4678}
2922 4679
2923static void 4680static void
2924embed_io_cb (EV_P_ ev_io *io, int revents) 4681embed_io_cb (EV_P_ ev_io *io, int revents)
2925{ 4682{
2926 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4683 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2927 4684
2928 if (ev_cb (w)) 4685 if (ev_cb (w))
2929 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4686 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2930 else 4687 else
2931 ev_loop (w->other, EVLOOP_NONBLOCK); 4688 ev_run (w->other, EVRUN_NOWAIT);
2932} 4689}
2933 4690
2934static void 4691static void
2935embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4692embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2936{ 4693{
2937 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4694 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2938 4695
2939 { 4696 {
2940 struct ev_loop *loop = w->other; 4697 EV_P = w->other;
2941 4698
2942 while (fdchangecnt) 4699 while (fdchangecnt)
2943 { 4700 {
2944 fd_reify (EV_A); 4701 fd_reify (EV_A);
2945 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4702 ev_run (EV_A_ EVRUN_NOWAIT);
2946 } 4703 }
2947 } 4704 }
2948} 4705}
2949 4706
2950static void 4707static void
… …
2953 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 4710 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2954 4711
2955 ev_embed_stop (EV_A_ w); 4712 ev_embed_stop (EV_A_ w);
2956 4713
2957 { 4714 {
2958 struct ev_loop *loop = w->other; 4715 EV_P = w->other;
2959 4716
2960 ev_loop_fork (EV_A); 4717 ev_loop_fork (EV_A);
2961 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4718 ev_run (EV_A_ EVRUN_NOWAIT);
2962 } 4719 }
2963 4720
2964 ev_embed_start (EV_A_ w); 4721 ev_embed_start (EV_A_ w);
2965} 4722}
2966 4723
… …
2971 ev_idle_stop (EV_A_ idle); 4728 ev_idle_stop (EV_A_ idle);
2972} 4729}
2973#endif 4730#endif
2974 4731
2975void 4732void
2976ev_embed_start (EV_P_ ev_embed *w) 4733ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2977{ 4734{
2978 if (expect_false (ev_is_active (w))) 4735 if (expect_false (ev_is_active (w)))
2979 return; 4736 return;
2980 4737
2981 { 4738 {
2982 struct ev_loop *loop = w->other; 4739 EV_P = w->other;
2983 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4740 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2984 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4741 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2985 } 4742 }
2986 4743
2987 EV_FREQUENT_CHECK; 4744 EV_FREQUENT_CHECK;
… …
3002 4759
3003 EV_FREQUENT_CHECK; 4760 EV_FREQUENT_CHECK;
3004} 4761}
3005 4762
3006void 4763void
3007ev_embed_stop (EV_P_ ev_embed *w) 4764ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3008{ 4765{
3009 clear_pending (EV_A_ (W)w); 4766 clear_pending (EV_A_ (W)w);
3010 if (expect_false (!ev_is_active (w))) 4767 if (expect_false (!ev_is_active (w)))
3011 return; 4768 return;
3012 4769
… …
3014 4771
3015 ev_io_stop (EV_A_ &w->io); 4772 ev_io_stop (EV_A_ &w->io);
3016 ev_prepare_stop (EV_A_ &w->prepare); 4773 ev_prepare_stop (EV_A_ &w->prepare);
3017 ev_fork_stop (EV_A_ &w->fork); 4774 ev_fork_stop (EV_A_ &w->fork);
3018 4775
4776 ev_stop (EV_A_ (W)w);
4777
3019 EV_FREQUENT_CHECK; 4778 EV_FREQUENT_CHECK;
3020} 4779}
3021#endif 4780#endif
3022 4781
3023#if EV_FORK_ENABLE 4782#if EV_FORK_ENABLE
3024void 4783void
3025ev_fork_start (EV_P_ ev_fork *w) 4784ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3026{ 4785{
3027 if (expect_false (ev_is_active (w))) 4786 if (expect_false (ev_is_active (w)))
3028 return; 4787 return;
3029 4788
3030 EV_FREQUENT_CHECK; 4789 EV_FREQUENT_CHECK;
… …
3035 4794
3036 EV_FREQUENT_CHECK; 4795 EV_FREQUENT_CHECK;
3037} 4796}
3038 4797
3039void 4798void
3040ev_fork_stop (EV_P_ ev_fork *w) 4799ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3041{ 4800{
3042 clear_pending (EV_A_ (W)w); 4801 clear_pending (EV_A_ (W)w);
3043 if (expect_false (!ev_is_active (w))) 4802 if (expect_false (!ev_is_active (w)))
3044 return; 4803 return;
3045 4804
… …
3056 4815
3057 EV_FREQUENT_CHECK; 4816 EV_FREQUENT_CHECK;
3058} 4817}
3059#endif 4818#endif
3060 4819
4820#if EV_CLEANUP_ENABLE
4821void
4822ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4823{
4824 if (expect_false (ev_is_active (w)))
4825 return;
4826
4827 EV_FREQUENT_CHECK;
4828
4829 ev_start (EV_A_ (W)w, ++cleanupcnt);
4830 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4831 cleanups [cleanupcnt - 1] = w;
4832
4833 /* cleanup watchers should never keep a refcount on the loop */
4834 ev_unref (EV_A);
4835 EV_FREQUENT_CHECK;
4836}
4837
4838void
4839ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4840{
4841 clear_pending (EV_A_ (W)w);
4842 if (expect_false (!ev_is_active (w)))
4843 return;
4844
4845 EV_FREQUENT_CHECK;
4846 ev_ref (EV_A);
4847
4848 {
4849 int active = ev_active (w);
4850
4851 cleanups [active - 1] = cleanups [--cleanupcnt];
4852 ev_active (cleanups [active - 1]) = active;
4853 }
4854
4855 ev_stop (EV_A_ (W)w);
4856
4857 EV_FREQUENT_CHECK;
4858}
4859#endif
4860
3061#if EV_ASYNC_ENABLE 4861#if EV_ASYNC_ENABLE
3062void 4862void
3063ev_async_start (EV_P_ ev_async *w) 4863ev_async_start (EV_P_ ev_async *w) EV_THROW
3064{ 4864{
3065 if (expect_false (ev_is_active (w))) 4865 if (expect_false (ev_is_active (w)))
3066 return; 4866 return;
4867
4868 w->sent = 0;
3067 4869
3068 evpipe_init (EV_A); 4870 evpipe_init (EV_A);
3069 4871
3070 EV_FREQUENT_CHECK; 4872 EV_FREQUENT_CHECK;
3071 4873
… …
3075 4877
3076 EV_FREQUENT_CHECK; 4878 EV_FREQUENT_CHECK;
3077} 4879}
3078 4880
3079void 4881void
3080ev_async_stop (EV_P_ ev_async *w) 4882ev_async_stop (EV_P_ ev_async *w) EV_THROW
3081{ 4883{
3082 clear_pending (EV_A_ (W)w); 4884 clear_pending (EV_A_ (W)w);
3083 if (expect_false (!ev_is_active (w))) 4885 if (expect_false (!ev_is_active (w)))
3084 return; 4886 return;
3085 4887
… …
3096 4898
3097 EV_FREQUENT_CHECK; 4899 EV_FREQUENT_CHECK;
3098} 4900}
3099 4901
3100void 4902void
3101ev_async_send (EV_P_ ev_async *w) 4903ev_async_send (EV_P_ ev_async *w) EV_THROW
3102{ 4904{
3103 w->sent = 1; 4905 w->sent = 1;
3104 evpipe_write (EV_A_ &gotasync); 4906 evpipe_write (EV_A_ &async_pending);
3105} 4907}
3106#endif 4908#endif
3107 4909
3108/*****************************************************************************/ 4910/*****************************************************************************/
3109 4911
… …
3143 4945
3144 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4946 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3145} 4947}
3146 4948
3147void 4949void
3148ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4950ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3149{ 4951{
3150 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4952 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3151 4953
3152 if (expect_false (!once)) 4954 if (expect_false (!once))
3153 { 4955 {
3154 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4956 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3155 return; 4957 return;
3156 } 4958 }
3157 4959
3158 once->cb = cb; 4960 once->cb = cb;
3159 once->arg = arg; 4961 once->arg = arg;
… …
3173 } 4975 }
3174} 4976}
3175 4977
3176/*****************************************************************************/ 4978/*****************************************************************************/
3177 4979
3178#if 0 4980#if EV_WALK_ENABLE
3179void 4981void ecb_cold
3180ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4982ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3181{ 4983{
3182 int i, j; 4984 int i, j;
3183 ev_watcher_list *wl, *wn; 4985 ev_watcher_list *wl, *wn;
3184 4986
3185 if (types & (EV_IO | EV_EMBED)) 4987 if (types & (EV_IO | EV_EMBED))
… …
3199#if EV_USE_INOTIFY 5001#if EV_USE_INOTIFY
3200 if (ev_cb ((ev_io *)wl) == infy_cb) 5002 if (ev_cb ((ev_io *)wl) == infy_cb)
3201 ; 5003 ;
3202 else 5004 else
3203#endif 5005#endif
3204 if ((ev_io *)wl != &pipeev) 5006 if ((ev_io *)wl != &pipe_w)
3205 if (types & EV_IO) 5007 if (types & EV_IO)
3206 cb (EV_A_ EV_IO, wl); 5008 cb (EV_A_ EV_IO, wl);
3207 5009
3208 wl = wn; 5010 wl = wn;
3209 } 5011 }
… …
3228 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3229#endif 5031#endif
3230 5032
3231#if EV_IDLE_ENABLE 5033#if EV_IDLE_ENABLE
3232 if (types & EV_IDLE) 5034 if (types & EV_IDLE)
3233 for (j = NUMPRI; i--; ) 5035 for (j = NUMPRI; j--; )
3234 for (i = idlecnt [j]; i--; ) 5036 for (i = idlecnt [j]; i--; )
3235 cb (EV_A_ EV_IDLE, idles [j][i]); 5037 cb (EV_A_ EV_IDLE, idles [j][i]);
3236#endif 5038#endif
3237 5039
3238#if EV_FORK_ENABLE 5040#if EV_FORK_ENABLE
… …
3246 if (types & EV_ASYNC) 5048 if (types & EV_ASYNC)
3247 for (i = asynccnt; i--; ) 5049 for (i = asynccnt; i--; )
3248 cb (EV_A_ EV_ASYNC, asyncs [i]); 5050 cb (EV_A_ EV_ASYNC, asyncs [i]);
3249#endif 5051#endif
3250 5052
5053#if EV_PREPARE_ENABLE
3251 if (types & EV_PREPARE) 5054 if (types & EV_PREPARE)
3252 for (i = preparecnt; i--; ) 5055 for (i = preparecnt; i--; )
3253#if EV_EMBED_ENABLE 5056# if EV_EMBED_ENABLE
3254 if (ev_cb (prepares [i]) != embed_prepare_cb) 5057 if (ev_cb (prepares [i]) != embed_prepare_cb)
3255#endif 5058# endif
3256 cb (EV_A_ EV_PREPARE, prepares [i]); 5059 cb (EV_A_ EV_PREPARE, prepares [i]);
5060#endif
3257 5061
5062#if EV_CHECK_ENABLE
3258 if (types & EV_CHECK) 5063 if (types & EV_CHECK)
3259 for (i = checkcnt; i--; ) 5064 for (i = checkcnt; i--; )
3260 cb (EV_A_ EV_CHECK, checks [i]); 5065 cb (EV_A_ EV_CHECK, checks [i]);
5066#endif
3261 5067
5068#if EV_SIGNAL_ENABLE
3262 if (types & EV_SIGNAL) 5069 if (types & EV_SIGNAL)
3263 for (i = 0; i < signalmax; ++i) 5070 for (i = 0; i < EV_NSIG - 1; ++i)
3264 for (wl = signals [i].head; wl; ) 5071 for (wl = signals [i].head; wl; )
3265 { 5072 {
3266 wn = wl->next; 5073 wn = wl->next;
3267 cb (EV_A_ EV_SIGNAL, wl); 5074 cb (EV_A_ EV_SIGNAL, wl);
3268 wl = wn; 5075 wl = wn;
3269 } 5076 }
5077#endif
3270 5078
5079#if EV_CHILD_ENABLE
3271 if (types & EV_CHILD) 5080 if (types & EV_CHILD)
3272 for (i = EV_PID_HASHSIZE; i--; ) 5081 for (i = (EV_PID_HASHSIZE); i--; )
3273 for (wl = childs [i]; wl; ) 5082 for (wl = childs [i]; wl; )
3274 { 5083 {
3275 wn = wl->next; 5084 wn = wl->next;
3276 cb (EV_A_ EV_CHILD, wl); 5085 cb (EV_A_ EV_CHILD, wl);
3277 wl = wn; 5086 wl = wn;
3278 } 5087 }
5088#endif
3279/* EV_STAT 0x00001000 /* stat data changed */ 5089/* EV_STAT 0x00001000 /* stat data changed */
3280/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 5090/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3281} 5091}
3282#endif 5092#endif
3283 5093
3284#if EV_MULTIPLICITY 5094#if EV_MULTIPLICITY
3285 #include "ev_wrap.h" 5095 #include "ev_wrap.h"
3286#endif 5096#endif
3287 5097
3288#ifdef __cplusplus
3289}
3290#endif
3291

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