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Comparing libev/ev.c (file contents):
Revision 1.240 by root, Thu May 8 21:21:41 2008 UTC vs.
Revision 1.480 by root, Thu Feb 18 04:48:05 2016 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 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"
50# endif 46# endif
51 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# 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
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
130# endif 154# endif
131 155
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
132#endif 163# endif
164
165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# 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
152#endif 197#endif
153 198
154#ifndef _WIN32 199#ifndef _WIN32
155# include <sys/time.h> 200# include <sys/time.h>
156# include <sys/wait.h> 201# include <sys/wait.h>
157# include <unistd.h> 202# include <unistd.h>
158#else 203#else
204# include <io.h>
159# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
160# include <windows.h> 207# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
163# endif 210# endif
211# undef EV_AVOID_STDIO
164#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
165 221
166/* 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 */
167 223
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
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
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
168#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
272# define EV_USE_MONOTONIC EV_FEATURE_OS
273# else
169# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
275# endif
170#endif 276#endif
171 277
172#ifndef EV_USE_REALTIME 278#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 280#endif
175 281
176#ifndef EV_USE_NANOSLEEP 282#ifndef EV_USE_NANOSLEEP
283# if _POSIX_C_SOURCE >= 199309L
284# define EV_USE_NANOSLEEP EV_FEATURE_OS
285# else
177# define EV_USE_NANOSLEEP 0 286# define EV_USE_NANOSLEEP 0
287# endif
178#endif 288#endif
179 289
180#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 292#endif
183 293
184#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
185# ifdef _WIN32 295# ifdef _WIN32
186# define EV_USE_POLL 0 296# define EV_USE_POLL 0
187# else 297# else
188# define EV_USE_POLL 1 298# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 299# endif
190#endif 300#endif
191 301
192#ifndef EV_USE_EPOLL 302#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 304# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 305# else
196# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
197# endif 307# endif
198#endif 308#endif
199 309
… …
205# define EV_USE_PORT 0 315# define EV_USE_PORT 0
206#endif 316#endif
207 317
208#ifndef EV_USE_INOTIFY 318#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 320# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 321# else
212# define EV_USE_INOTIFY 0 322# define EV_USE_INOTIFY 0
213# endif 323# endif
214#endif 324#endif
215 325
216#ifndef EV_PID_HASHSIZE 326#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 327# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 328#endif
223 329
224#ifndef EV_INOTIFY_HASHSIZE 330#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 331# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 332#endif
231 333
232#ifndef EV_USE_EVENTFD 334#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 335# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 336# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 337# else
236# define EV_USE_EVENTFD 0 338# define EV_USE_EVENTFD 0
237# endif 339# endif
238#endif 340#endif
239 341
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
347# endif
348#endif
349
350#if 0 /* debugging */
351# define EV_VERIFY 3
352# define EV_USE_4HEAP 1
353# define EV_HEAP_CACHE_AT 1
354#endif
355
356#ifndef EV_VERIFY
357# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
358#endif
359
360#ifndef EV_USE_4HEAP
361# define EV_USE_4HEAP EV_FEATURE_DATA
362#endif
363
364#ifndef EV_HEAP_CACHE_AT
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
396#endif
397
240/* 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 */
241 399
242#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
… …
253# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
255#endif 413#endif
256 414
257#if !EV_USE_NANOSLEEP 415#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
259# include <sys/select.h> 418# include <sys/select.h>
260# endif 419# endif
261#endif 420#endif
262 421
263#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
423# include <sys/statfs.h>
264# include <sys/inotify.h> 424# include <sys/inotify.h>
425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
426# ifndef IN_DONT_FOLLOW
427# undef EV_USE_INOTIFY
428# define EV_USE_INOTIFY 0
265#endif 429# endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif 430#endif
270 431
271#if EV_USE_EVENTFD 432#if EV_USE_EVENTFD
272/* 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 */
273# include <stdint.h> 434# include <stdint.h>
274# ifdef __cplusplus 435# ifndef EFD_NONBLOCK
275extern "C" { 436# define EFD_NONBLOCK O_NONBLOCK
276# endif 437# endif
277int eventfd (unsigned int initval, int flags); 438# ifndef EFD_CLOEXEC
278# ifdef __cplusplus 439# ifdef O_CLOEXEC
279} 440# define EFD_CLOEXEC O_CLOEXEC
441# else
442# define EFD_CLOEXEC 02000000
443# endif
280# 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};
281#endif 468#endif
282 469
283/**/ 470/**/
284 471
472#if EV_VERIFY >= 3
473# define EV_FREQUENT_CHECK ev_verify (EV_A)
474#else
475# define EV_FREQUENT_CHECK do { } while (0)
476#endif
477
285/* 478/*
286 * This is used to avoid floating point rounding problems. 479 * This is used to work around floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000. 480 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */ 481 */
293#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 */
294 484
295#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) */
296#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) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298 487
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;
299#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)
300# define expect(expr,value) __builtin_expect ((expr),(value)) 840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
301# define noinline __attribute__ ((noinline))
302#else 841#else
303# define expect(expr,value) (expr) 842 #define ecb_expect(expr,value) (expr)
304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif 843#endif
308#endif
309 844
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. */
310#define expect_false(expr) expect ((expr) != 0, 0) 909#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
311#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
312#define inline_size static inline 1527#define inline_size ecb_inline
313 1528
314#if EV_MINIMAL 1529#if EV_FEATURE_CODE
315# define inline_speed static noinline
316#else
317# define inline_speed static inline 1530# define inline_speed ecb_inline
1531#else
1532# define inline_speed noinline static
318#endif 1533#endif
319 1534
320#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
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1540# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1541#endif
322 1542
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1543#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */ 1544#define EMPTY2(a,b) /* used to suppress some warnings */
325 1545
326typedef ev_watcher *W; 1546typedef ev_watcher *W;
… …
328typedef ev_watcher_time *WT; 1548typedef ev_watcher_time *WT;
329 1549
330#define ev_active(w) ((W)(w))->active 1550#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at 1551#define ev_at(w) ((WT)(w))->at
332 1552
1553#if EV_USE_REALTIME
1554/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1555/* giving it a reasonably high chance of working on typical architectures */
1556static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1557#endif
1558
333#if EV_USE_MONOTONIC 1559#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1560static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1561#endif
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)
337#endif 1571#endif
338 1572
339#ifdef _WIN32 1573#ifdef _WIN32
340# include "ev_win32.c" 1574# include "ev_win32.c"
341#endif 1575#endif
342 1576
343/*****************************************************************************/ 1577/*****************************************************************************/
344 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 */
1589noinline
1590static ev_tstamp
1591ev_floor (ev_tstamp v)
1592{
1593 /* the choice of shift factor is not terribly important */
1594#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1595 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1596#else
1597 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1598#endif
1599
1600 /* argument too large for an unsigned long? */
1601 if (expect_false (v >= shift))
1602 {
1603 ev_tstamp f;
1604
1605 if (v == v - 1.)
1606 return v; /* very large number */
1607
1608 f = shift * ev_floor (v * (1. / shift));
1609 return f + ev_floor (v - f);
1610 }
1611
1612 /* special treatment for negative args? */
1613 if (expect_false (v < 0.))
1614 {
1615 ev_tstamp f = -ev_floor (-v);
1616
1617 return f - (f == v ? 0 : 1);
1618 }
1619
1620 /* fits into an unsigned long */
1621 return (unsigned long)v;
1622}
1623
1624#endif
1625
1626/*****************************************************************************/
1627
1628#ifdef __linux
1629# include <sys/utsname.h>
1630#endif
1631
1632noinline ecb_cold
1633static unsigned int
1634ev_linux_version (void)
1635{
1636#ifdef __linux
1637 unsigned int v = 0;
1638 struct utsname buf;
1639 int i;
1640 char *p = buf.release;
1641
1642 if (uname (&buf))
1643 return 0;
1644
1645 for (i = 3+1; --i; )
1646 {
1647 unsigned int c = 0;
1648
1649 for (;;)
1650 {
1651 if (*p >= '0' && *p <= '9')
1652 c = c * 10 + *p++ - '0';
1653 else
1654 {
1655 p += *p == '.';
1656 break;
1657 }
1658 }
1659
1660 v = (v << 8) | c;
1661 }
1662
1663 return v;
1664#else
1665 return 0;
1666#endif
1667}
1668
1669/*****************************************************************************/
1670
1671#if EV_AVOID_STDIO
1672noinline ecb_cold
1673static void
1674ev_printerr (const char *msg)
1675{
1676 write (STDERR_FILENO, msg, strlen (msg));
1677}
1678#endif
1679
345static void (*syserr_cb)(const char *msg); 1680static void (*syserr_cb)(const char *msg) EV_THROW;
346 1681
1682ecb_cold
347void 1683void
348ev_set_syserr_cb (void (*cb)(const char *msg)) 1684ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
349{ 1685{
350 syserr_cb = cb; 1686 syserr_cb = cb;
351} 1687}
352 1688
353static void noinline 1689noinline ecb_cold
1690static void
354syserr (const char *msg) 1691ev_syserr (const char *msg)
355{ 1692{
356 if (!msg) 1693 if (!msg)
357 msg = "(libev) system error"; 1694 msg = "(libev) system error";
358 1695
359 if (syserr_cb) 1696 if (syserr_cb)
360 syserr_cb (msg); 1697 syserr_cb (msg);
361 else 1698 else
362 { 1699 {
1700#if EV_AVOID_STDIO
1701 ev_printerr (msg);
1702 ev_printerr (": ");
1703 ev_printerr (strerror (errno));
1704 ev_printerr ("\n");
1705#else
363 perror (msg); 1706 perror (msg);
1707#endif
364 abort (); 1708 abort ();
365 } 1709 }
366} 1710}
367 1711
368static void * 1712static void *
369ev_realloc_emul (void *ptr, long size) 1713ev_realloc_emul (void *ptr, long size) EV_THROW
370{ 1714{
371 /* some systems, notably openbsd and darwin, fail to properly 1715 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and 1716 * implement realloc (x, 0) (as required by both ansi c-89 and
373 * the single unix specification, so work around them here. 1717 * the single unix specification, so work around them here.
1718 * recently, also (at least) fedora and debian started breaking it,
1719 * despite documenting it otherwise.
374 */ 1720 */
375 1721
376 if (size) 1722 if (size)
377 return realloc (ptr, size); 1723 return realloc (ptr, size);
378 1724
379 free (ptr); 1725 free (ptr);
380 return 0; 1726 return 0;
381} 1727}
382 1728
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1729static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
384 1730
1731ecb_cold
385void 1732void
386ev_set_allocator (void *(*cb)(void *ptr, long size)) 1733ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
387{ 1734{
388 alloc = cb; 1735 alloc = cb;
389} 1736}
390 1737
391inline_speed void * 1738inline_speed void *
… …
393{ 1740{
394 ptr = alloc (ptr, size); 1741 ptr = alloc (ptr, size);
395 1742
396 if (!ptr && size) 1743 if (!ptr && size)
397 { 1744 {
1745#if EV_AVOID_STDIO
1746 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1747#else
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1748 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1749#endif
399 abort (); 1750 abort ();
400 } 1751 }
401 1752
402 return ptr; 1753 return ptr;
403} 1754}
… …
405#define ev_malloc(size) ev_realloc (0, (size)) 1756#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0) 1757#define ev_free(ptr) ev_realloc ((ptr), 0)
407 1758
408/*****************************************************************************/ 1759/*****************************************************************************/
409 1760
1761/* set in reify when reification needed */
1762#define EV_ANFD_REIFY 1
1763
1764/* file descriptor info structure */
410typedef struct 1765typedef struct
411{ 1766{
412 WL head; 1767 WL head;
413 unsigned char events; 1768 unsigned char events; /* the events watched for */
1769 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1770 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
414 unsigned char reify; 1771 unsigned char unused;
1772#if EV_USE_EPOLL
1773 unsigned int egen; /* generation counter to counter epoll bugs */
1774#endif
415#if EV_SELECT_IS_WINSOCKET 1775#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
416 SOCKET handle; 1776 SOCKET handle;
417#endif 1777#endif
1778#if EV_USE_IOCP
1779 OVERLAPPED or, ow;
1780#endif
418} ANFD; 1781} ANFD;
419 1782
1783/* stores the pending event set for a given watcher */
420typedef struct 1784typedef struct
421{ 1785{
422 W w; 1786 W w;
423 int events; 1787 int events; /* the pending event set for the given watcher */
424} ANPENDING; 1788} ANPENDING;
425 1789
426#if EV_USE_INOTIFY 1790#if EV_USE_INOTIFY
1791/* hash table entry per inotify-id */
427typedef struct 1792typedef struct
428{ 1793{
429 WL head; 1794 WL head;
430} ANFS; 1795} ANFS;
1796#endif
1797
1798/* Heap Entry */
1799#if EV_HEAP_CACHE_AT
1800 /* a heap element */
1801 typedef struct {
1802 ev_tstamp at;
1803 WT w;
1804 } ANHE;
1805
1806 #define ANHE_w(he) (he).w /* access watcher, read-write */
1807 #define ANHE_at(he) (he).at /* access cached at, read-only */
1808 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1809#else
1810 /* a heap element */
1811 typedef WT ANHE;
1812
1813 #define ANHE_w(he) (he)
1814 #define ANHE_at(he) (he)->at
1815 #define ANHE_at_cache(he)
431#endif 1816#endif
432 1817
433#if EV_MULTIPLICITY 1818#if EV_MULTIPLICITY
434 1819
435 struct ev_loop 1820 struct ev_loop
… …
441 #undef VAR 1826 #undef VAR
442 }; 1827 };
443 #include "ev_wrap.h" 1828 #include "ev_wrap.h"
444 1829
445 static struct ev_loop default_loop_struct; 1830 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr; 1831 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
447 1832
448#else 1833#else
449 1834
450 ev_tstamp ev_rt_now; 1835 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
451 #define VAR(name,decl) static decl; 1836 #define VAR(name,decl) static decl;
452 #include "ev_vars.h" 1837 #include "ev_vars.h"
453 #undef VAR 1838 #undef VAR
454 1839
455 static int ev_default_loop_ptr; 1840 static int ev_default_loop_ptr;
456 1841
457#endif 1842#endif
458 1843
1844#if EV_FEATURE_API
1845# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1846# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1847# define EV_INVOKE_PENDING invoke_cb (EV_A)
1848#else
1849# define EV_RELEASE_CB (void)0
1850# define EV_ACQUIRE_CB (void)0
1851# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1852#endif
1853
1854#define EVBREAK_RECURSE 0x80
1855
459/*****************************************************************************/ 1856/*****************************************************************************/
460 1857
1858#ifndef EV_HAVE_EV_TIME
461ev_tstamp 1859ev_tstamp
462ev_time (void) 1860ev_time (void) EV_THROW
463{ 1861{
464#if EV_USE_REALTIME 1862#if EV_USE_REALTIME
1863 if (expect_true (have_realtime))
1864 {
465 struct timespec ts; 1865 struct timespec ts;
466 clock_gettime (CLOCK_REALTIME, &ts); 1866 clock_gettime (CLOCK_REALTIME, &ts);
467 return ts.tv_sec + ts.tv_nsec * 1e-9; 1867 return ts.tv_sec + ts.tv_nsec * 1e-9;
468#else 1868 }
1869#endif
1870
469 struct timeval tv; 1871 struct timeval tv;
470 gettimeofday (&tv, 0); 1872 gettimeofday (&tv, 0);
471 return tv.tv_sec + tv.tv_usec * 1e-6; 1873 return tv.tv_sec + tv.tv_usec * 1e-6;
472#endif
473} 1874}
1875#endif
474 1876
475ev_tstamp inline_size 1877inline_size ev_tstamp
476get_clock (void) 1878get_clock (void)
477{ 1879{
478#if EV_USE_MONOTONIC 1880#if EV_USE_MONOTONIC
479 if (expect_true (have_monotonic)) 1881 if (expect_true (have_monotonic))
480 { 1882 {
… …
487 return ev_time (); 1889 return ev_time ();
488} 1890}
489 1891
490#if EV_MULTIPLICITY 1892#if EV_MULTIPLICITY
491ev_tstamp 1893ev_tstamp
492ev_now (EV_P) 1894ev_now (EV_P) EV_THROW
493{ 1895{
494 return ev_rt_now; 1896 return ev_rt_now;
495} 1897}
496#endif 1898#endif
497 1899
498void 1900void
499ev_sleep (ev_tstamp delay) 1901ev_sleep (ev_tstamp delay) EV_THROW
500{ 1902{
501 if (delay > 0.) 1903 if (delay > 0.)
502 { 1904 {
503#if EV_USE_NANOSLEEP 1905#if EV_USE_NANOSLEEP
504 struct timespec ts; 1906 struct timespec ts;
505 1907
506 ts.tv_sec = (time_t)delay; 1908 EV_TS_SET (ts, delay);
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0); 1909 nanosleep (&ts, 0);
510#elif defined(_WIN32) 1910#elif defined _WIN32
511 Sleep ((unsigned long)(delay * 1e3)); 1911 Sleep ((unsigned long)(delay * 1e3));
512#else 1912#else
513 struct timeval tv; 1913 struct timeval tv;
514 1914
515 tv.tv_sec = (time_t)delay; 1915 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1916 /* something not guaranteed by newer posix versions, but guaranteed */
517 1917 /* by older ones */
1918 EV_TV_SET (tv, delay);
518 select (0, 0, 0, 0, &tv); 1919 select (0, 0, 0, 0, &tv);
519#endif 1920#endif
520 } 1921 }
521} 1922}
522 1923
523/*****************************************************************************/ 1924/*****************************************************************************/
524 1925
525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1926#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
526 1927
527int inline_size 1928/* find a suitable new size for the given array, */
1929/* hopefully by rounding to a nice-to-malloc size */
1930inline_size int
528array_nextsize (int elem, int cur, int cnt) 1931array_nextsize (int elem, int cur, int cnt)
529{ 1932{
530 int ncur = cur + 1; 1933 int ncur = cur + 1;
531 1934
532 do 1935 do
533 ncur <<= 1; 1936 ncur <<= 1;
534 while (cnt > ncur); 1937 while (cnt > ncur);
535 1938
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1939 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1940 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 { 1941 {
539 ncur *= elem; 1942 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1943 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4; 1944 ncur = ncur - sizeof (void *) * 4;
… …
543 } 1946 }
544 1947
545 return ncur; 1948 return ncur;
546} 1949}
547 1950
548static noinline void * 1951noinline ecb_cold
1952static void *
549array_realloc (int elem, void *base, int *cur, int cnt) 1953array_realloc (int elem, void *base, int *cur, int cnt)
550{ 1954{
551 *cur = array_nextsize (elem, *cur, cnt); 1955 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur); 1956 return ev_realloc (base, elem * *cur);
553} 1957}
1958
1959#define array_init_zero(base,count) \
1960 memset ((void *)(base), 0, sizeof (*(base)) * (count))
554 1961
555#define array_needsize(type,base,cur,cnt,init) \ 1962#define array_needsize(type,base,cur,cnt,init) \
556 if (expect_false ((cnt) > (cur))) \ 1963 if (expect_false ((cnt) > (cur))) \
557 { \ 1964 { \
558 int ocur_ = (cur); \ 1965 ecb_unused int ocur_ = (cur); \
559 (base) = (type *)array_realloc \ 1966 (base) = (type *)array_realloc \
560 (sizeof (type), (base), &(cur), (cnt)); \ 1967 (sizeof (type), (base), &(cur), (cnt)); \
561 init ((base) + (ocur_), (cur) - ocur_); \ 1968 init ((base) + (ocur_), (cur) - ocur_); \
562 } 1969 }
563 1970
… …
570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1977 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
571 } 1978 }
572#endif 1979#endif
573 1980
574#define array_free(stem, idx) \ 1981#define array_free(stem, idx) \
575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1982 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
576 1983
577/*****************************************************************************/ 1984/*****************************************************************************/
578 1985
1986/* dummy callback for pending events */
579void noinline 1987noinline
1988static void
1989pendingcb (EV_P_ ev_prepare *w, int revents)
1990{
1991}
1992
1993noinline
1994void
580ev_feed_event (EV_P_ void *w, int revents) 1995ev_feed_event (EV_P_ void *w, int revents) EV_THROW
581{ 1996{
582 W w_ = (W)w; 1997 W w_ = (W)w;
583 int pri = ABSPRI (w_); 1998 int pri = ABSPRI (w_);
584 1999
585 if (expect_false (w_->pending)) 2000 if (expect_false (w_->pending))
… …
589 w_->pending = ++pendingcnt [pri]; 2004 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2005 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_; 2006 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents; 2007 pendings [pri][w_->pending - 1].events = revents;
593 } 2008 }
594}
595 2009
596void inline_speed 2010 pendingpri = NUMPRI - 1;
2011}
2012
2013inline_speed void
2014feed_reverse (EV_P_ W w)
2015{
2016 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
2017 rfeeds [rfeedcnt++] = w;
2018}
2019
2020inline_size void
2021feed_reverse_done (EV_P_ int revents)
2022{
2023 do
2024 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2025 while (rfeedcnt);
2026}
2027
2028inline_speed void
597queue_events (EV_P_ W *events, int eventcnt, int type) 2029queue_events (EV_P_ W *events, int eventcnt, int type)
598{ 2030{
599 int i; 2031 int i;
600 2032
601 for (i = 0; i < eventcnt; ++i) 2033 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type); 2034 ev_feed_event (EV_A_ events [i], type);
603} 2035}
604 2036
605/*****************************************************************************/ 2037/*****************************************************************************/
606 2038
607void inline_size 2039inline_speed void
608anfds_init (ANFD *base, int count)
609{
610 while (count--)
611 {
612 base->head = 0;
613 base->events = EV_NONE;
614 base->reify = 0;
615
616 ++base;
617 }
618}
619
620void inline_speed
621fd_event (EV_P_ int fd, int revents) 2040fd_event_nocheck (EV_P_ int fd, int revents)
622{ 2041{
623 ANFD *anfd = anfds + fd; 2042 ANFD *anfd = anfds + fd;
624 ev_io *w; 2043 ev_io *w;
625 2044
626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2045 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
630 if (ev) 2049 if (ev)
631 ev_feed_event (EV_A_ (W)w, ev); 2050 ev_feed_event (EV_A_ (W)w, ev);
632 } 2051 }
633} 2052}
634 2053
2054/* do not submit kernel events for fds that have reify set */
2055/* because that means they changed while we were polling for new events */
2056inline_speed void
2057fd_event (EV_P_ int fd, int revents)
2058{
2059 ANFD *anfd = anfds + fd;
2060
2061 if (expect_true (!anfd->reify))
2062 fd_event_nocheck (EV_A_ fd, revents);
2063}
2064
635void 2065void
636ev_feed_fd_event (EV_P_ int fd, int revents) 2066ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
637{ 2067{
638 if (fd >= 0 && fd < anfdmax) 2068 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents); 2069 fd_event_nocheck (EV_A_ fd, revents);
640} 2070}
641 2071
642void inline_size 2072/* make sure the external fd watch events are in-sync */
2073/* with the kernel/libev internal state */
2074inline_size void
643fd_reify (EV_P) 2075fd_reify (EV_P)
644{ 2076{
645 int i; 2077 int i;
2078
2079#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2080 for (i = 0; i < fdchangecnt; ++i)
2081 {
2082 int fd = fdchanges [i];
2083 ANFD *anfd = anfds + fd;
2084
2085 if (anfd->reify & EV__IOFDSET && anfd->head)
2086 {
2087 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2088
2089 if (handle != anfd->handle)
2090 {
2091 unsigned long arg;
2092
2093 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2094
2095 /* handle changed, but fd didn't - we need to do it in two steps */
2096 backend_modify (EV_A_ fd, anfd->events, 0);
2097 anfd->events = 0;
2098 anfd->handle = handle;
2099 }
2100 }
2101 }
2102#endif
646 2103
647 for (i = 0; i < fdchangecnt; ++i) 2104 for (i = 0; i < fdchangecnt; ++i)
648 { 2105 {
649 int fd = fdchanges [i]; 2106 int fd = fdchanges [i];
650 ANFD *anfd = anfds + fd; 2107 ANFD *anfd = anfds + fd;
651 ev_io *w; 2108 ev_io *w;
652 2109
653 unsigned char events = 0; 2110 unsigned char o_events = anfd->events;
2111 unsigned char o_reify = anfd->reify;
654 2112
655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2113 anfd->reify = 0;
656 events |= (unsigned char)w->events;
657 2114
658#if EV_SELECT_IS_WINSOCKET 2115 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
659 if (events)
660 { 2116 {
661 unsigned long argp; 2117 anfd->events = 0;
662 #ifdef EV_FD_TO_WIN32_HANDLE 2118
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2119 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
664 #else 2120 anfd->events |= (unsigned char)w->events;
665 anfd->handle = _get_osfhandle (fd); 2121
666 #endif 2122 if (o_events != anfd->events)
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 2123 o_reify = EV__IOFDSET; /* actually |= */
668 } 2124 }
669#endif
670 2125
671 { 2126 if (o_reify & EV__IOFDSET)
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
675 anfd->reify = 0;
676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events); 2127 backend_modify (EV_A_ fd, o_events, anfd->events);
680 }
681 } 2128 }
682 2129
683 fdchangecnt = 0; 2130 fdchangecnt = 0;
684} 2131}
685 2132
2133/* something about the given fd changed */
686void inline_size 2134inline_size
2135void
687fd_change (EV_P_ int fd, int flags) 2136fd_change (EV_P_ int fd, int flags)
688{ 2137{
689 unsigned char reify = anfds [fd].reify; 2138 unsigned char reify = anfds [fd].reify;
690 anfds [fd].reify |= flags; 2139 anfds [fd].reify |= flags;
691 2140
… …
695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2144 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
696 fdchanges [fdchangecnt - 1] = fd; 2145 fdchanges [fdchangecnt - 1] = fd;
697 } 2146 }
698} 2147}
699 2148
700void inline_speed 2149/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2150inline_speed ecb_cold void
701fd_kill (EV_P_ int fd) 2151fd_kill (EV_P_ int fd)
702{ 2152{
703 ev_io *w; 2153 ev_io *w;
704 2154
705 while ((w = (ev_io *)anfds [fd].head)) 2155 while ((w = (ev_io *)anfds [fd].head))
… …
707 ev_io_stop (EV_A_ w); 2157 ev_io_stop (EV_A_ w);
708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2158 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
709 } 2159 }
710} 2160}
711 2161
712int inline_size 2162/* check whether the given fd is actually valid, for error recovery */
2163inline_size ecb_cold int
713fd_valid (int fd) 2164fd_valid (int fd)
714{ 2165{
715#ifdef _WIN32 2166#ifdef _WIN32
716 return _get_osfhandle (fd) != -1; 2167 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
717#else 2168#else
718 return fcntl (fd, F_GETFD) != -1; 2169 return fcntl (fd, F_GETFD) != -1;
719#endif 2170#endif
720} 2171}
721 2172
722/* called on EBADF to verify fds */ 2173/* called on EBADF to verify fds */
723static void noinline 2174noinline ecb_cold
2175static void
724fd_ebadf (EV_P) 2176fd_ebadf (EV_P)
725{ 2177{
726 int fd; 2178 int fd;
727 2179
728 for (fd = 0; fd < anfdmax; ++fd) 2180 for (fd = 0; fd < anfdmax; ++fd)
729 if (anfds [fd].events) 2181 if (anfds [fd].events)
730 if (!fd_valid (fd) == -1 && errno == EBADF) 2182 if (!fd_valid (fd) && errno == EBADF)
731 fd_kill (EV_A_ fd); 2183 fd_kill (EV_A_ fd);
732} 2184}
733 2185
734/* called on ENOMEM in select/poll to kill some fds and retry */ 2186/* called on ENOMEM in select/poll to kill some fds and retry */
735static void noinline 2187noinline ecb_cold
2188static void
736fd_enomem (EV_P) 2189fd_enomem (EV_P)
737{ 2190{
738 int fd; 2191 int fd;
739 2192
740 for (fd = anfdmax; fd--; ) 2193 for (fd = anfdmax; fd--; )
741 if (anfds [fd].events) 2194 if (anfds [fd].events)
742 { 2195 {
743 fd_kill (EV_A_ fd); 2196 fd_kill (EV_A_ fd);
744 return; 2197 break;
745 } 2198 }
746} 2199}
747 2200
748/* usually called after fork if backend needs to re-arm all fds from scratch */ 2201/* usually called after fork if backend needs to re-arm all fds from scratch */
749static void noinline 2202noinline
2203static void
750fd_rearm_all (EV_P) 2204fd_rearm_all (EV_P)
751{ 2205{
752 int fd; 2206 int fd;
753 2207
754 for (fd = 0; fd < anfdmax; ++fd) 2208 for (fd = 0; fd < anfdmax; ++fd)
755 if (anfds [fd].events) 2209 if (anfds [fd].events)
756 { 2210 {
757 anfds [fd].events = 0; 2211 anfds [fd].events = 0;
2212 anfds [fd].emask = 0;
758 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2213 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
759 } 2214 }
760} 2215}
761 2216
2217/* used to prepare libev internal fd's */
2218/* this is not fork-safe */
2219inline_speed void
2220fd_intern (int fd)
2221{
2222#ifdef _WIN32
2223 unsigned long arg = 1;
2224 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2225#else
2226 fcntl (fd, F_SETFD, FD_CLOEXEC);
2227 fcntl (fd, F_SETFL, O_NONBLOCK);
2228#endif
2229}
2230
762/*****************************************************************************/ 2231/*****************************************************************************/
2232
2233/*
2234 * the heap functions want a real array index. array index 0 is guaranteed to not
2235 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2236 * the branching factor of the d-tree.
2237 */
763 2238
764/* 2239/*
765 * at the moment we allow libev the luxury of two heaps, 2240 * at the moment we allow libev the luxury of two heaps,
766 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap 2241 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
767 * which is more cache-efficient. 2242 * which is more cache-efficient.
768 * the difference is about 5% with 50000+ watchers. 2243 * the difference is about 5% with 50000+ watchers.
769 */ 2244 */
770#define USE_4HEAP !EV_MINIMAL
771#if USE_4HEAP 2245#if EV_USE_4HEAP
772 2246
773#define DHEAP 4 2247#define DHEAP 4
774#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 2248#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2249#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2250#define UPHEAP_DONE(p,k) ((p) == (k))
775 2251
776/* towards the root */ 2252/* away from the root */
777void inline_speed 2253inline_speed void
778upheap (WT *heap, int k) 2254downheap (ANHE *heap, int N, int k)
779{ 2255{
780 WT w = heap [k]; 2256 ANHE he = heap [k];
781 ev_tstamp w_at = w->at; 2257 ANHE *E = heap + N + HEAP0;
782 2258
783 for (;;) 2259 for (;;)
784 { 2260 {
785 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
786
787 if (p == k || heap [p]->at <= w_at)
788 break;
789
790 heap [k] = heap [p];
791 ev_active (heap [k]) = k;
792 k = p;
793 }
794
795 heap [k] = w;
796 ev_active (heap [k]) = k;
797}
798
799/* away from the root */
800void inline_speed
801downheap (WT *heap, int N, int k)
802{
803 WT w = heap [k];
804 WT *E = heap + N + HEAP0;
805
806 for (;;)
807 {
808 ev_tstamp minat; 2261 ev_tstamp minat;
809 WT *minpos; 2262 ANHE *minpos;
810 WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0; 2263 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
811 2264
812 // find minimum child 2265 /* find minimum child */
813 if (expect_true (pos + DHEAP - 1 < E)) 2266 if (expect_true (pos + DHEAP - 1 < E))
814 { 2267 {
815 /* fast path */ (minpos = pos + 0), (minat = (*minpos)->at); 2268 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
816 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at); 2269 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
817 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at); 2270 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
818 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at); 2271 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
819 } 2272 }
820 else if (pos < E) 2273 else if (pos < E)
821 { 2274 {
822 /* slow path */ (minpos = pos + 0), (minat = (*minpos)->at); 2275 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
823 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at); 2276 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
824 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at); 2277 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
825 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at); 2278 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
826 } 2279 }
827 else 2280 else
828 break; 2281 break;
829 2282
830 if (w->at <= minat) 2283 if (ANHE_at (he) <= minat)
831 break; 2284 break;
832 2285
833 ev_active (*minpos) = k;
834 heap [k] = *minpos; 2286 heap [k] = *minpos;
2287 ev_active (ANHE_w (*minpos)) = k;
835 2288
836 k = minpos - heap; 2289 k = minpos - heap;
837 } 2290 }
838 2291
839 heap [k] = w; 2292 heap [k] = he;
840 ev_active (heap [k]) = k; 2293 ev_active (ANHE_w (he)) = k;
841} 2294}
842 2295
843#else // 4HEAP 2296#else /* 4HEAP */
844 2297
845#define HEAP0 1 2298#define HEAP0 1
2299#define HPARENT(k) ((k) >> 1)
2300#define UPHEAP_DONE(p,k) (!(p))
846 2301
847/* towards the root */ 2302/* away from the root */
848void inline_speed 2303inline_speed void
849upheap (WT *heap, int k) 2304downheap (ANHE *heap, int N, int k)
850{ 2305{
851 WT w = heap [k]; 2306 ANHE he = heap [k];
852 2307
853 for (;;) 2308 for (;;)
854 { 2309 {
855 int p = k >> 1; 2310 int c = k << 1;
856 2311
857 /* maybe we could use a dummy element at heap [0]? */ 2312 if (c >= N + HEAP0)
858 if (!p || heap [p]->at <= w->at)
859 break; 2313 break;
860 2314
861 heap [k] = heap [p]; 2315 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
862 ev_active (heap [k]) = k; 2316 ? 1 : 0;
863 k = p;
864 }
865 2317
866 heap [k] = w; 2318 if (ANHE_at (he) <= ANHE_at (heap [c]))
867 ev_active (heap [k]) = k;
868}
869
870/* away from the root */
871void inline_speed
872downheap (WT *heap, int N, int k)
873{
874 WT w = heap [k];
875
876 for (;;)
877 {
878 int c = k << 1;
879
880 if (c > N)
881 break; 2319 break;
882 2320
883 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
884 ? 1 : 0;
885
886 if (w->at <= heap [c]->at)
887 break;
888
889 heap [k] = heap [c]; 2321 heap [k] = heap [c];
890 ((W)heap [k])->active = k; 2322 ev_active (ANHE_w (heap [k])) = k;
891 2323
892 k = c; 2324 k = c;
893 } 2325 }
894 2326
895 heap [k] = w; 2327 heap [k] = he;
2328 ev_active (ANHE_w (he)) = k;
2329}
2330#endif
2331
2332/* towards the root */
2333inline_speed void
2334upheap (ANHE *heap, int k)
2335{
2336 ANHE he = heap [k];
2337
2338 for (;;)
2339 {
2340 int p = HPARENT (k);
2341
2342 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2343 break;
2344
2345 heap [k] = heap [p];
896 ev_active (heap [k]) = k; 2346 ev_active (ANHE_w (heap [k])) = k;
897} 2347 k = p;
898#endif 2348 }
899 2349
900void inline_size 2350 heap [k] = he;
2351 ev_active (ANHE_w (he)) = k;
2352}
2353
2354/* move an element suitably so it is in a correct place */
2355inline_size void
901adjustheap (WT *heap, int N, int k) 2356adjustheap (ANHE *heap, int N, int k)
902{ 2357{
2358 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
903 upheap (heap, k); 2359 upheap (heap, k);
2360 else
904 downheap (heap, N, k); 2361 downheap (heap, N, k);
2362}
2363
2364/* rebuild the heap: this function is used only once and executed rarely */
2365inline_size void
2366reheap (ANHE *heap, int N)
2367{
2368 int i;
2369
2370 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2371 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2372 for (i = 0; i < N; ++i)
2373 upheap (heap, i + HEAP0);
905} 2374}
906 2375
907/*****************************************************************************/ 2376/*****************************************************************************/
908 2377
2378/* associate signal watchers to a signal signal */
909typedef struct 2379typedef struct
910{ 2380{
2381 EV_ATOMIC_T pending;
2382#if EV_MULTIPLICITY
2383 EV_P;
2384#endif
911 WL head; 2385 WL head;
912 EV_ATOMIC_T gotsig;
913} ANSIG; 2386} ANSIG;
914 2387
915static ANSIG *signals; 2388static ANSIG signals [EV_NSIG - 1];
916static int signalmax;
917
918static EV_ATOMIC_T gotsig;
919
920void inline_size
921signals_init (ANSIG *base, int count)
922{
923 while (count--)
924 {
925 base->head = 0;
926 base->gotsig = 0;
927
928 ++base;
929 }
930}
931 2389
932/*****************************************************************************/ 2390/*****************************************************************************/
933 2391
934void inline_speed 2392#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
935fd_intern (int fd)
936{
937#ifdef _WIN32
938 int arg = 1;
939 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
940#else
941 fcntl (fd, F_SETFD, FD_CLOEXEC);
942 fcntl (fd, F_SETFL, O_NONBLOCK);
943#endif
944}
945 2393
946static void noinline 2394noinline ecb_cold
2395static void
947evpipe_init (EV_P) 2396evpipe_init (EV_P)
948{ 2397{
949 if (!ev_is_active (&pipeev)) 2398 if (!ev_is_active (&pipe_w))
2399 {
2400 int fds [2];
2401
2402# if EV_USE_EVENTFD
2403 fds [0] = -1;
2404 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2405 if (fds [1] < 0 && errno == EINVAL)
2406 fds [1] = eventfd (0, 0);
2407
2408 if (fds [1] < 0)
2409# endif
2410 {
2411 while (pipe (fds))
2412 ev_syserr ("(libev) error creating signal/async pipe");
2413
2414 fd_intern (fds [0]);
2415 }
2416
2417 evpipe [0] = fds [0];
2418
2419 if (evpipe [1] < 0)
2420 evpipe [1] = fds [1]; /* first call, set write fd */
2421 else
2422 {
2423 /* on subsequent calls, do not change evpipe [1] */
2424 /* so that evpipe_write can always rely on its value. */
2425 /* this branch does not do anything sensible on windows, */
2426 /* so must not be executed on windows */
2427
2428 dup2 (fds [1], evpipe [1]);
2429 close (fds [1]);
2430 }
2431
2432 fd_intern (evpipe [1]);
2433
2434 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2435 ev_io_start (EV_A_ &pipe_w);
2436 ev_unref (EV_A); /* watcher should not keep loop alive */
950 { 2437 }
2438}
2439
2440inline_speed void
2441evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2442{
2443 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2444
2445 if (expect_true (*flag))
2446 return;
2447
2448 *flag = 1;
2449 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2450
2451 pipe_write_skipped = 1;
2452
2453 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2454
2455 if (pipe_write_wanted)
2456 {
2457 int old_errno;
2458
2459 pipe_write_skipped = 0;
2460 ECB_MEMORY_FENCE_RELEASE;
2461
2462 old_errno = errno; /* save errno because write will clobber it */
2463
951#if EV_USE_EVENTFD 2464#if EV_USE_EVENTFD
952 if ((evfd = eventfd (0, 0)) >= 0) 2465 if (evpipe [0] < 0)
953 { 2466 {
954 evpipe [0] = -1; 2467 uint64_t counter = 1;
955 fd_intern (evfd); 2468 write (evpipe [1], &counter, sizeof (uint64_t));
956 ev_io_set (&pipeev, evfd, EV_READ);
957 } 2469 }
958 else 2470 else
959#endif 2471#endif
960 { 2472 {
961 while (pipe (evpipe)) 2473#ifdef _WIN32
962 syserr ("(libev) error creating signal/async pipe"); 2474 WSABUF buf;
963 2475 DWORD sent;
964 fd_intern (evpipe [0]); 2476 buf.buf = &buf;
965 fd_intern (evpipe [1]); 2477 buf.len = 1;
966 ev_io_set (&pipeev, evpipe [0], EV_READ); 2478 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2479#else
2480 write (evpipe [1], &(evpipe [1]), 1);
2481#endif
967 } 2482 }
968 2483
969 ev_io_start (EV_A_ &pipeev); 2484 errno = old_errno;
970 ev_unref (EV_A); /* watcher should not keep loop alive */
971 }
972}
973
974void inline_size
975evpipe_write (EV_P_ EV_ATOMIC_T *flag)
976{
977 if (!*flag)
978 { 2485 }
979 int old_errno = errno; /* save errno because write might clobber it */ 2486}
980 2487
981 *flag = 1; 2488/* called whenever the libev signal pipe */
2489/* got some events (signal, async) */
2490static void
2491pipecb (EV_P_ ev_io *iow, int revents)
2492{
2493 int i;
982 2494
2495 if (revents & EV_READ)
2496 {
983#if EV_USE_EVENTFD 2497#if EV_USE_EVENTFD
984 if (evfd >= 0) 2498 if (evpipe [0] < 0)
985 { 2499 {
986 uint64_t counter = 1; 2500 uint64_t counter;
987 write (evfd, &counter, sizeof (uint64_t)); 2501 read (evpipe [1], &counter, sizeof (uint64_t));
988 } 2502 }
989 else 2503 else
990#endif 2504#endif
991 write (evpipe [1], &old_errno, 1); 2505 {
992
993 errno = old_errno;
994 }
995}
996
997static void
998pipecb (EV_P_ ev_io *iow, int revents)
999{
1000#if EV_USE_EVENTFD
1001 if (evfd >= 0)
1002 {
1003 uint64_t counter;
1004 read (evfd, &counter, sizeof (uint64_t));
1005 }
1006 else
1007#endif
1008 {
1009 char dummy; 2506 char dummy[4];
2507#ifdef _WIN32
2508 WSABUF buf;
2509 DWORD recvd;
2510 DWORD flags = 0;
2511 buf.buf = dummy;
2512 buf.len = sizeof (dummy);
2513 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2514#else
1010 read (evpipe [0], &dummy, 1); 2515 read (evpipe [0], &dummy, sizeof (dummy));
2516#endif
2517 }
2518 }
2519
2520 pipe_write_skipped = 0;
2521
2522 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2523
2524#if EV_SIGNAL_ENABLE
2525 if (sig_pending)
1011 } 2526 {
2527 sig_pending = 0;
1012 2528
1013 if (gotsig && ev_is_default_loop (EV_A)) 2529 ECB_MEMORY_FENCE;
1014 {
1015 int signum;
1016 gotsig = 0;
1017 2530
1018 for (signum = signalmax; signum--; ) 2531 for (i = EV_NSIG - 1; i--; )
1019 if (signals [signum].gotsig) 2532 if (expect_false (signals [i].pending))
1020 ev_feed_signal_event (EV_A_ signum + 1); 2533 ev_feed_signal_event (EV_A_ i + 1);
1021 } 2534 }
2535#endif
1022 2536
1023#if EV_ASYNC_ENABLE 2537#if EV_ASYNC_ENABLE
1024 if (gotasync) 2538 if (async_pending)
1025 { 2539 {
1026 int i; 2540 async_pending = 0;
1027 gotasync = 0; 2541
2542 ECB_MEMORY_FENCE;
1028 2543
1029 for (i = asynccnt; i--; ) 2544 for (i = asynccnt; i--; )
1030 if (asyncs [i]->sent) 2545 if (asyncs [i]->sent)
1031 { 2546 {
1032 asyncs [i]->sent = 0; 2547 asyncs [i]->sent = 0;
2548 ECB_MEMORY_FENCE_RELEASE;
1033 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2549 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1034 } 2550 }
1035 } 2551 }
1036#endif 2552#endif
1037} 2553}
1038 2554
1039/*****************************************************************************/ 2555/*****************************************************************************/
1040 2556
2557void
2558ev_feed_signal (int signum) EV_THROW
2559{
2560#if EV_MULTIPLICITY
2561 EV_P;
2562 ECB_MEMORY_FENCE_ACQUIRE;
2563 EV_A = signals [signum - 1].loop;
2564
2565 if (!EV_A)
2566 return;
2567#endif
2568
2569 signals [signum - 1].pending = 1;
2570 evpipe_write (EV_A_ &sig_pending);
2571}
2572
1041static void 2573static void
1042ev_sighandler (int signum) 2574ev_sighandler (int signum)
1043{ 2575{
2576#ifdef _WIN32
2577 signal (signum, ev_sighandler);
2578#endif
2579
2580 ev_feed_signal (signum);
2581}
2582
2583noinline
2584void
2585ev_feed_signal_event (EV_P_ int signum) EV_THROW
2586{
2587 WL w;
2588
2589 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2590 return;
2591
2592 --signum;
2593
1044#if EV_MULTIPLICITY 2594#if EV_MULTIPLICITY
1045 struct ev_loop *loop = &default_loop_struct; 2595 /* it is permissible to try to feed a signal to the wrong loop */
1046#endif 2596 /* or, likely more useful, feeding a signal nobody is waiting for */
1047 2597
1048#if _WIN32 2598 if (expect_false (signals [signum].loop != EV_A))
1049 signal (signum, ev_sighandler);
1050#endif
1051
1052 signals [signum - 1].gotsig = 1;
1053 evpipe_write (EV_A_ &gotsig);
1054}
1055
1056void noinline
1057ev_feed_signal_event (EV_P_ int signum)
1058{
1059 WL w;
1060
1061#if EV_MULTIPLICITY
1062 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1063#endif
1064
1065 --signum;
1066
1067 if (signum < 0 || signum >= signalmax)
1068 return; 2599 return;
2600#endif
1069 2601
1070 signals [signum].gotsig = 0; 2602 signals [signum].pending = 0;
2603 ECB_MEMORY_FENCE_RELEASE;
1071 2604
1072 for (w = signals [signum].head; w; w = w->next) 2605 for (w = signals [signum].head; w; w = w->next)
1073 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2606 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1074} 2607}
1075 2608
2609#if EV_USE_SIGNALFD
2610static void
2611sigfdcb (EV_P_ ev_io *iow, int revents)
2612{
2613 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2614
2615 for (;;)
2616 {
2617 ssize_t res = read (sigfd, si, sizeof (si));
2618
2619 /* not ISO-C, as res might be -1, but works with SuS */
2620 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2621 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2622
2623 if (res < (ssize_t)sizeof (si))
2624 break;
2625 }
2626}
2627#endif
2628
2629#endif
2630
1076/*****************************************************************************/ 2631/*****************************************************************************/
1077 2632
2633#if EV_CHILD_ENABLE
1078static WL childs [EV_PID_HASHSIZE]; 2634static WL childs [EV_PID_HASHSIZE];
1079
1080#ifndef _WIN32
1081 2635
1082static ev_signal childev; 2636static ev_signal childev;
1083 2637
1084#ifndef WIFCONTINUED 2638#ifndef WIFCONTINUED
1085# define WIFCONTINUED(status) 0 2639# define WIFCONTINUED(status) 0
1086#endif 2640#endif
1087 2641
1088void inline_speed 2642/* handle a single child status event */
2643inline_speed void
1089child_reap (EV_P_ int chain, int pid, int status) 2644child_reap (EV_P_ int chain, int pid, int status)
1090{ 2645{
1091 ev_child *w; 2646 ev_child *w;
1092 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2647 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1093 2648
1094 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2649 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1095 { 2650 {
1096 if ((w->pid == pid || !w->pid) 2651 if ((w->pid == pid || !w->pid)
1097 && (!traced || (w->flags & 1))) 2652 && (!traced || (w->flags & 1)))
1098 { 2653 {
1099 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2654 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1106 2661
1107#ifndef WCONTINUED 2662#ifndef WCONTINUED
1108# define WCONTINUED 0 2663# define WCONTINUED 0
1109#endif 2664#endif
1110 2665
2666/* called on sigchld etc., calls waitpid */
1111static void 2667static void
1112childcb (EV_P_ ev_signal *sw, int revents) 2668childcb (EV_P_ ev_signal *sw, int revents)
1113{ 2669{
1114 int pid, status; 2670 int pid, status;
1115 2671
… …
1123 /* make sure we are called again until all children have been reaped */ 2679 /* make sure we are called again until all children have been reaped */
1124 /* we need to do it this way so that the callback gets called before we continue */ 2680 /* we need to do it this way so that the callback gets called before we continue */
1125 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2681 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1126 2682
1127 child_reap (EV_A_ pid, pid, status); 2683 child_reap (EV_A_ pid, pid, status);
1128 if (EV_PID_HASHSIZE > 1) 2684 if ((EV_PID_HASHSIZE) > 1)
1129 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2685 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1130} 2686}
1131 2687
1132#endif 2688#endif
1133 2689
1134/*****************************************************************************/ 2690/*****************************************************************************/
1135 2691
2692#if EV_USE_IOCP
2693# include "ev_iocp.c"
2694#endif
1136#if EV_USE_PORT 2695#if EV_USE_PORT
1137# include "ev_port.c" 2696# include "ev_port.c"
1138#endif 2697#endif
1139#if EV_USE_KQUEUE 2698#if EV_USE_KQUEUE
1140# include "ev_kqueue.c" 2699# include "ev_kqueue.c"
… …
1147#endif 2706#endif
1148#if EV_USE_SELECT 2707#if EV_USE_SELECT
1149# include "ev_select.c" 2708# include "ev_select.c"
1150#endif 2709#endif
1151 2710
1152int 2711ecb_cold int
1153ev_version_major (void) 2712ev_version_major (void) EV_THROW
1154{ 2713{
1155 return EV_VERSION_MAJOR; 2714 return EV_VERSION_MAJOR;
1156} 2715}
1157 2716
1158int 2717ecb_cold int
1159ev_version_minor (void) 2718ev_version_minor (void) EV_THROW
1160{ 2719{
1161 return EV_VERSION_MINOR; 2720 return EV_VERSION_MINOR;
1162} 2721}
1163 2722
1164/* return true if we are running with elevated privileges and should ignore env variables */ 2723/* return true if we are running with elevated privileges and should ignore env variables */
1165int inline_size 2724inline_size ecb_cold int
1166enable_secure (void) 2725enable_secure (void)
1167{ 2726{
1168#ifdef _WIN32 2727#ifdef _WIN32
1169 return 0; 2728 return 0;
1170#else 2729#else
1171 return getuid () != geteuid () 2730 return getuid () != geteuid ()
1172 || getgid () != getegid (); 2731 || getgid () != getegid ();
1173#endif 2732#endif
1174} 2733}
1175 2734
2735ecb_cold
1176unsigned int 2736unsigned int
1177ev_supported_backends (void) 2737ev_supported_backends (void) EV_THROW
1178{ 2738{
1179 unsigned int flags = 0; 2739 unsigned int flags = 0;
1180 2740
1181 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1182 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2742 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1185 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1186 2746
1187 return flags; 2747 return flags;
1188} 2748}
1189 2749
2750ecb_cold
1190unsigned int 2751unsigned int
1191ev_recommended_backends (void) 2752ev_recommended_backends (void) EV_THROW
1192{ 2753{
1193 unsigned int flags = ev_supported_backends (); 2754 unsigned int flags = ev_supported_backends ();
1194 2755
1195#ifndef __NetBSD__ 2756#ifndef __NetBSD__
1196 /* kqueue is borked on everything but netbsd apparently */ 2757 /* kqueue is borked on everything but netbsd apparently */
1197 /* it usually doesn't work correctly on anything but sockets and pipes */ 2758 /* it usually doesn't work correctly on anything but sockets and pipes */
1198 flags &= ~EVBACKEND_KQUEUE; 2759 flags &= ~EVBACKEND_KQUEUE;
1199#endif 2760#endif
1200#ifdef __APPLE__ 2761#ifdef __APPLE__
1201 // flags &= ~EVBACKEND_KQUEUE; for documentation 2762 /* only select works correctly on that "unix-certified" platform */
1202 flags &= ~EVBACKEND_POLL; 2763 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2764 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2765#endif
2766#ifdef __FreeBSD__
2767 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1203#endif 2768#endif
1204 2769
1205 return flags; 2770 return flags;
1206} 2771}
1207 2772
2773ecb_cold
1208unsigned int 2774unsigned int
1209ev_embeddable_backends (void) 2775ev_embeddable_backends (void) EV_THROW
1210{ 2776{
1211 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2777 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1212 2778
1213 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2779 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1214 /* please fix it and tell me how to detect the fix */ 2780 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1215 flags &= ~EVBACKEND_EPOLL; 2781 flags &= ~EVBACKEND_EPOLL;
1216 2782
1217 return flags; 2783 return flags;
1218} 2784}
1219 2785
1220unsigned int 2786unsigned int
1221ev_backend (EV_P) 2787ev_backend (EV_P) EV_THROW
1222{ 2788{
1223 return backend; 2789 return backend;
1224} 2790}
1225 2791
2792#if EV_FEATURE_API
1226unsigned int 2793unsigned int
1227ev_loop_count (EV_P) 2794ev_iteration (EV_P) EV_THROW
1228{ 2795{
1229 return loop_count; 2796 return loop_count;
1230} 2797}
1231 2798
2799unsigned int
2800ev_depth (EV_P) EV_THROW
2801{
2802 return loop_depth;
2803}
2804
1232void 2805void
1233ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2806ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1234{ 2807{
1235 io_blocktime = interval; 2808 io_blocktime = interval;
1236} 2809}
1237 2810
1238void 2811void
1239ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2812ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1240{ 2813{
1241 timeout_blocktime = interval; 2814 timeout_blocktime = interval;
1242} 2815}
1243 2816
1244static void noinline 2817void
2818ev_set_userdata (EV_P_ void *data) EV_THROW
2819{
2820 userdata = data;
2821}
2822
2823void *
2824ev_userdata (EV_P) EV_THROW
2825{
2826 return userdata;
2827}
2828
2829void
2830ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2831{
2832 invoke_cb = invoke_pending_cb;
2833}
2834
2835void
2836ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2837{
2838 release_cb = release;
2839 acquire_cb = acquire;
2840}
2841#endif
2842
2843/* initialise a loop structure, must be zero-initialised */
2844noinline ecb_cold
2845static void
1245loop_init (EV_P_ unsigned int flags) 2846loop_init (EV_P_ unsigned int flags) EV_THROW
1246{ 2847{
1247 if (!backend) 2848 if (!backend)
1248 { 2849 {
2850 origflags = flags;
2851
2852#if EV_USE_REALTIME
2853 if (!have_realtime)
2854 {
2855 struct timespec ts;
2856
2857 if (!clock_gettime (CLOCK_REALTIME, &ts))
2858 have_realtime = 1;
2859 }
2860#endif
2861
1249#if EV_USE_MONOTONIC 2862#if EV_USE_MONOTONIC
2863 if (!have_monotonic)
1250 { 2864 {
1251 struct timespec ts; 2865 struct timespec ts;
2866
1252 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2867 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1253 have_monotonic = 1; 2868 have_monotonic = 1;
1254 } 2869 }
1255#endif
1256
1257 ev_rt_now = ev_time ();
1258 mn_now = get_clock ();
1259 now_floor = mn_now;
1260 rtmn_diff = ev_rt_now - mn_now;
1261
1262 io_blocktime = 0.;
1263 timeout_blocktime = 0.;
1264 backend = 0;
1265 backend_fd = -1;
1266 gotasync = 0;
1267#if EV_USE_INOTIFY
1268 fs_fd = -2;
1269#endif 2870#endif
1270 2871
1271 /* pid check not overridable via env */ 2872 /* pid check not overridable via env */
1272#ifndef _WIN32 2873#ifndef _WIN32
1273 if (flags & EVFLAG_FORKCHECK) 2874 if (flags & EVFLAG_FORKCHECK)
… …
1277 if (!(flags & EVFLAG_NOENV) 2878 if (!(flags & EVFLAG_NOENV)
1278 && !enable_secure () 2879 && !enable_secure ()
1279 && getenv ("LIBEV_FLAGS")) 2880 && getenv ("LIBEV_FLAGS"))
1280 flags = atoi (getenv ("LIBEV_FLAGS")); 2881 flags = atoi (getenv ("LIBEV_FLAGS"));
1281 2882
1282 if (!(flags & 0x0000ffffU)) 2883 ev_rt_now = ev_time ();
2884 mn_now = get_clock ();
2885 now_floor = mn_now;
2886 rtmn_diff = ev_rt_now - mn_now;
2887#if EV_FEATURE_API
2888 invoke_cb = ev_invoke_pending;
2889#endif
2890
2891 io_blocktime = 0.;
2892 timeout_blocktime = 0.;
2893 backend = 0;
2894 backend_fd = -1;
2895 sig_pending = 0;
2896#if EV_ASYNC_ENABLE
2897 async_pending = 0;
2898#endif
2899 pipe_write_skipped = 0;
2900 pipe_write_wanted = 0;
2901 evpipe [0] = -1;
2902 evpipe [1] = -1;
2903#if EV_USE_INOTIFY
2904 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2905#endif
2906#if EV_USE_SIGNALFD
2907 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2908#endif
2909
2910 if (!(flags & EVBACKEND_MASK))
1283 flags |= ev_recommended_backends (); 2911 flags |= ev_recommended_backends ();
1284 2912
2913#if EV_USE_IOCP
2914 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2915#endif
1285#if EV_USE_PORT 2916#if EV_USE_PORT
1286 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2917 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1287#endif 2918#endif
1288#if EV_USE_KQUEUE 2919#if EV_USE_KQUEUE
1289 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2920 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1296#endif 2927#endif
1297#if EV_USE_SELECT 2928#if EV_USE_SELECT
1298 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2929 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1299#endif 2930#endif
1300 2931
2932 ev_prepare_init (&pending_w, pendingcb);
2933
2934#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1301 ev_init (&pipeev, pipecb); 2935 ev_init (&pipe_w, pipecb);
1302 ev_set_priority (&pipeev, EV_MAXPRI); 2936 ev_set_priority (&pipe_w, EV_MAXPRI);
2937#endif
1303 } 2938 }
1304} 2939}
1305 2940
1306static void noinline 2941/* free up a loop structure */
2942ecb_cold
2943void
1307loop_destroy (EV_P) 2944ev_loop_destroy (EV_P)
1308{ 2945{
1309 int i; 2946 int i;
1310 2947
2948#if EV_MULTIPLICITY
2949 /* mimic free (0) */
2950 if (!EV_A)
2951 return;
2952#endif
2953
2954#if EV_CLEANUP_ENABLE
2955 /* queue cleanup watchers (and execute them) */
2956 if (expect_false (cleanupcnt))
2957 {
2958 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2959 EV_INVOKE_PENDING;
2960 }
2961#endif
2962
2963#if EV_CHILD_ENABLE
2964 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2965 {
2966 ev_ref (EV_A); /* child watcher */
2967 ev_signal_stop (EV_A_ &childev);
2968 }
2969#endif
2970
1311 if (ev_is_active (&pipeev)) 2971 if (ev_is_active (&pipe_w))
1312 { 2972 {
1313 ev_ref (EV_A); /* signal watcher */ 2973 /*ev_ref (EV_A);*/
1314 ev_io_stop (EV_A_ &pipeev); 2974 /*ev_io_stop (EV_A_ &pipe_w);*/
1315 2975
2976 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2977 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2978 }
2979
1316#if EV_USE_EVENTFD 2980#if EV_USE_SIGNALFD
1317 if (evfd >= 0) 2981 if (ev_is_active (&sigfd_w))
1318 close (evfd); 2982 close (sigfd);
1319#endif 2983#endif
1320
1321 if (evpipe [0] >= 0)
1322 {
1323 close (evpipe [0]);
1324 close (evpipe [1]);
1325 }
1326 }
1327 2984
1328#if EV_USE_INOTIFY 2985#if EV_USE_INOTIFY
1329 if (fs_fd >= 0) 2986 if (fs_fd >= 0)
1330 close (fs_fd); 2987 close (fs_fd);
1331#endif 2988#endif
1332 2989
1333 if (backend_fd >= 0) 2990 if (backend_fd >= 0)
1334 close (backend_fd); 2991 close (backend_fd);
1335 2992
2993#if EV_USE_IOCP
2994 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2995#endif
1336#if EV_USE_PORT 2996#if EV_USE_PORT
1337 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2997 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1338#endif 2998#endif
1339#if EV_USE_KQUEUE 2999#if EV_USE_KQUEUE
1340 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3000 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1355#if EV_IDLE_ENABLE 3015#if EV_IDLE_ENABLE
1356 array_free (idle, [i]); 3016 array_free (idle, [i]);
1357#endif 3017#endif
1358 } 3018 }
1359 3019
1360 ev_free (anfds); anfdmax = 0; 3020 ev_free (anfds); anfds = 0; anfdmax = 0;
1361 3021
1362 /* have to use the microsoft-never-gets-it-right macro */ 3022 /* have to use the microsoft-never-gets-it-right macro */
3023 array_free (rfeed, EMPTY);
1363 array_free (fdchange, EMPTY); 3024 array_free (fdchange, EMPTY);
1364 array_free (timer, EMPTY); 3025 array_free (timer, EMPTY);
1365#if EV_PERIODIC_ENABLE 3026#if EV_PERIODIC_ENABLE
1366 array_free (periodic, EMPTY); 3027 array_free (periodic, EMPTY);
1367#endif 3028#endif
1368#if EV_FORK_ENABLE 3029#if EV_FORK_ENABLE
1369 array_free (fork, EMPTY); 3030 array_free (fork, EMPTY);
1370#endif 3031#endif
3032#if EV_CLEANUP_ENABLE
3033 array_free (cleanup, EMPTY);
3034#endif
1371 array_free (prepare, EMPTY); 3035 array_free (prepare, EMPTY);
1372 array_free (check, EMPTY); 3036 array_free (check, EMPTY);
1373#if EV_ASYNC_ENABLE 3037#if EV_ASYNC_ENABLE
1374 array_free (async, EMPTY); 3038 array_free (async, EMPTY);
1375#endif 3039#endif
1376 3040
1377 backend = 0; 3041 backend = 0;
3042
3043#if EV_MULTIPLICITY
3044 if (ev_is_default_loop (EV_A))
3045#endif
3046 ev_default_loop_ptr = 0;
3047#if EV_MULTIPLICITY
3048 else
3049 ev_free (EV_A);
3050#endif
1378} 3051}
1379 3052
1380#if EV_USE_INOTIFY 3053#if EV_USE_INOTIFY
1381void inline_size infy_fork (EV_P); 3054inline_size void infy_fork (EV_P);
1382#endif 3055#endif
1383 3056
1384void inline_size 3057inline_size void
1385loop_fork (EV_P) 3058loop_fork (EV_P)
1386{ 3059{
1387#if EV_USE_PORT 3060#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3061 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1389#endif 3062#endif
… …
1395#endif 3068#endif
1396#if EV_USE_INOTIFY 3069#if EV_USE_INOTIFY
1397 infy_fork (EV_A); 3070 infy_fork (EV_A);
1398#endif 3071#endif
1399 3072
1400 if (ev_is_active (&pipeev)) 3073#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3074 if (ev_is_active (&pipe_w) && postfork != 2)
3075 {
3076 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3077
3078 ev_ref (EV_A);
3079 ev_io_stop (EV_A_ &pipe_w);
3080
3081 if (evpipe [0] >= 0)
3082 EV_WIN32_CLOSE_FD (evpipe [0]);
3083
3084 evpipe_init (EV_A);
3085 /* iterate over everything, in case we missed something before */
3086 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1401 { 3087 }
1402 /* this "locks" the handlers against writing to the pipe */ 3088#endif
1403 /* while we modify the fd vars */ 3089
1404 gotsig = 1; 3090 postfork = 0;
3091}
3092
3093#if EV_MULTIPLICITY
3094
3095ecb_cold
3096struct ev_loop *
3097ev_loop_new (unsigned int flags) EV_THROW
3098{
3099 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3100
3101 memset (EV_A, 0, sizeof (struct ev_loop));
3102 loop_init (EV_A_ flags);
3103
3104 if (ev_backend (EV_A))
3105 return EV_A;
3106
3107 ev_free (EV_A);
3108 return 0;
3109}
3110
3111#endif /* multiplicity */
3112
3113#if EV_VERIFY
3114noinline ecb_cold
3115static void
3116verify_watcher (EV_P_ W w)
3117{
3118 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3119
3120 if (w->pending)
3121 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3122}
3123
3124noinline ecb_cold
3125static void
3126verify_heap (EV_P_ ANHE *heap, int N)
3127{
3128 int i;
3129
3130 for (i = HEAP0; i < N + HEAP0; ++i)
3131 {
3132 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3133 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3134 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3135
3136 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3137 }
3138}
3139
3140noinline ecb_cold
3141static void
3142array_verify (EV_P_ W *ws, int cnt)
3143{
3144 while (cnt--)
3145 {
3146 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3147 verify_watcher (EV_A_ ws [cnt]);
3148 }
3149}
3150#endif
3151
3152#if EV_FEATURE_API
3153void ecb_cold
3154ev_verify (EV_P) EV_THROW
3155{
3156#if EV_VERIFY
3157 int i;
3158 WL w, w2;
3159
3160 assert (activecnt >= -1);
3161
3162 assert (fdchangemax >= fdchangecnt);
3163 for (i = 0; i < fdchangecnt; ++i)
3164 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3165
3166 assert (anfdmax >= 0);
3167 for (i = 0; i < anfdmax; ++i)
3168 {
3169 int j = 0;
3170
3171 for (w = w2 = anfds [i].head; w; w = w->next)
3172 {
3173 verify_watcher (EV_A_ (W)w);
3174
3175 if (j++ & 1)
3176 {
3177 assert (("libev: io watcher list contains a loop", w != w2));
3178 w2 = w2->next;
3179 }
3180
3181 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3182 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3183 }
3184 }
3185
3186 assert (timermax >= timercnt);
3187 verify_heap (EV_A_ timers, timercnt);
3188
3189#if EV_PERIODIC_ENABLE
3190 assert (periodicmax >= periodiccnt);
3191 verify_heap (EV_A_ periodics, periodiccnt);
3192#endif
3193
3194 for (i = NUMPRI; i--; )
3195 {
3196 assert (pendingmax [i] >= pendingcnt [i]);
3197#if EV_IDLE_ENABLE
3198 assert (idleall >= 0);
3199 assert (idlemax [i] >= idlecnt [i]);
3200 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3201#endif
3202 }
3203
3204#if EV_FORK_ENABLE
3205 assert (forkmax >= forkcnt);
3206 array_verify (EV_A_ (W *)forks, forkcnt);
3207#endif
3208
3209#if EV_CLEANUP_ENABLE
3210 assert (cleanupmax >= cleanupcnt);
3211 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3212#endif
3213
1405#if EV_ASYNC_ENABLE 3214#if EV_ASYNC_ENABLE
1406 gotasync = 1; 3215 assert (asyncmax >= asynccnt);
3216 array_verify (EV_A_ (W *)asyncs, asynccnt);
3217#endif
3218
3219#if EV_PREPARE_ENABLE
3220 assert (preparemax >= preparecnt);
3221 array_verify (EV_A_ (W *)prepares, preparecnt);
3222#endif
3223
3224#if EV_CHECK_ENABLE
3225 assert (checkmax >= checkcnt);
3226 array_verify (EV_A_ (W *)checks, checkcnt);
3227#endif
3228
3229# if 0
3230#if EV_CHILD_ENABLE
3231 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3232 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3233#endif
1407#endif 3234# endif
1408
1409 ev_ref (EV_A);
1410 ev_io_stop (EV_A_ &pipeev);
1411
1412#if EV_USE_EVENTFD
1413 if (evfd >= 0)
1414 close (evfd);
1415#endif 3235#endif
1416
1417 if (evpipe [0] >= 0)
1418 {
1419 close (evpipe [0]);
1420 close (evpipe [1]);
1421 }
1422
1423 evpipe_init (EV_A);
1424 /* now iterate over everything, in case we missed something */
1425 pipecb (EV_A_ &pipeev, EV_READ);
1426 }
1427
1428 postfork = 0;
1429} 3236}
3237#endif
1430 3238
1431#if EV_MULTIPLICITY 3239#if EV_MULTIPLICITY
3240ecb_cold
1432struct ev_loop * 3241struct ev_loop *
1433ev_loop_new (unsigned int flags) 3242#else
1434{ 3243int
1435 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1436
1437 memset (loop, 0, sizeof (struct ev_loop));
1438
1439 loop_init (EV_A_ flags);
1440
1441 if (ev_backend (EV_A))
1442 return loop;
1443
1444 return 0;
1445}
1446
1447void
1448ev_loop_destroy (EV_P)
1449{
1450 loop_destroy (EV_A);
1451 ev_free (loop);
1452}
1453
1454void
1455ev_loop_fork (EV_P)
1456{
1457 postfork = 1; /* must be in line with ev_default_fork */
1458}
1459#endif 3244#endif
1460 3245ev_default_loop (unsigned int flags) EV_THROW
3246{
3247 if (!ev_default_loop_ptr)
3248 {
1461#if EV_MULTIPLICITY 3249#if EV_MULTIPLICITY
1462struct ev_loop *
1463ev_default_loop_init (unsigned int flags)
1464#else
1465int
1466ev_default_loop (unsigned int flags)
1467#endif
1468{
1469 if (!ev_default_loop_ptr)
1470 {
1471#if EV_MULTIPLICITY
1472 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3250 EV_P = ev_default_loop_ptr = &default_loop_struct;
1473#else 3251#else
1474 ev_default_loop_ptr = 1; 3252 ev_default_loop_ptr = 1;
1475#endif 3253#endif
1476 3254
1477 loop_init (EV_A_ flags); 3255 loop_init (EV_A_ flags);
1478 3256
1479 if (ev_backend (EV_A)) 3257 if (ev_backend (EV_A))
1480 { 3258 {
1481#ifndef _WIN32 3259#if EV_CHILD_ENABLE
1482 ev_signal_init (&childev, childcb, SIGCHLD); 3260 ev_signal_init (&childev, childcb, SIGCHLD);
1483 ev_set_priority (&childev, EV_MAXPRI); 3261 ev_set_priority (&childev, EV_MAXPRI);
1484 ev_signal_start (EV_A_ &childev); 3262 ev_signal_start (EV_A_ &childev);
1485 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3263 ev_unref (EV_A); /* child watcher should not keep loop alive */
1486#endif 3264#endif
… …
1491 3269
1492 return ev_default_loop_ptr; 3270 return ev_default_loop_ptr;
1493} 3271}
1494 3272
1495void 3273void
1496ev_default_destroy (void) 3274ev_loop_fork (EV_P) EV_THROW
1497{ 3275{
1498#if EV_MULTIPLICITY 3276 postfork = 1;
1499 struct ev_loop *loop = ev_default_loop_ptr;
1500#endif
1501
1502#ifndef _WIN32
1503 ev_ref (EV_A); /* child watcher */
1504 ev_signal_stop (EV_A_ &childev);
1505#endif
1506
1507 loop_destroy (EV_A);
1508}
1509
1510void
1511ev_default_fork (void)
1512{
1513#if EV_MULTIPLICITY
1514 struct ev_loop *loop = ev_default_loop_ptr;
1515#endif
1516
1517 if (backend)
1518 postfork = 1; /* must be in line with ev_loop_fork */
1519} 3277}
1520 3278
1521/*****************************************************************************/ 3279/*****************************************************************************/
1522 3280
1523void 3281void
1524ev_invoke (EV_P_ void *w, int revents) 3282ev_invoke (EV_P_ void *w, int revents)
1525{ 3283{
1526 EV_CB_INVOKE ((W)w, revents); 3284 EV_CB_INVOKE ((W)w, revents);
1527} 3285}
1528 3286
1529void inline_speed 3287unsigned int
1530call_pending (EV_P) 3288ev_pending_count (EV_P) EV_THROW
1531{ 3289{
1532 int pri; 3290 int pri;
3291 unsigned int count = 0;
1533 3292
1534 for (pri = NUMPRI; pri--; ) 3293 for (pri = NUMPRI; pri--; )
3294 count += pendingcnt [pri];
3295
3296 return count;
3297}
3298
3299noinline
3300void
3301ev_invoke_pending (EV_P)
3302{
3303 pendingpri = NUMPRI;
3304
3305 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3306 {
3307 --pendingpri;
3308
1535 while (pendingcnt [pri]) 3309 while (pendingcnt [pendingpri])
1536 {
1537 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1538
1539 if (expect_true (p->w))
1540 { 3310 {
1541 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 3311 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1542 3312
1543 p->w->pending = 0; 3313 p->w->pending = 0;
1544 EV_CB_INVOKE (p->w, p->events); 3314 EV_CB_INVOKE (p->w, p->events);
3315 EV_FREQUENT_CHECK;
1545 } 3316 }
1546 } 3317 }
1547} 3318}
1548 3319
1549#if EV_IDLE_ENABLE 3320#if EV_IDLE_ENABLE
1550void inline_size 3321/* make idle watchers pending. this handles the "call-idle */
3322/* only when higher priorities are idle" logic */
3323inline_size void
1551idle_reify (EV_P) 3324idle_reify (EV_P)
1552{ 3325{
1553 if (expect_false (idleall)) 3326 if (expect_false (idleall))
1554 { 3327 {
1555 int pri; 3328 int pri;
… …
1567 } 3340 }
1568 } 3341 }
1569} 3342}
1570#endif 3343#endif
1571 3344
1572void inline_size 3345/* make timers pending */
3346inline_size void
1573timers_reify (EV_P) 3347timers_reify (EV_P)
1574{ 3348{
3349 EV_FREQUENT_CHECK;
3350
1575 while (timercnt && ev_at (timers [HEAP0]) <= mn_now) 3351 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1576 { 3352 {
1577 ev_timer *w = (ev_timer *)timers [HEAP0]; 3353 do
1578
1579 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1580
1581 /* first reschedule or stop timer */
1582 if (w->repeat)
1583 { 3354 {
3355 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3356
3357 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3358
3359 /* first reschedule or stop timer */
3360 if (w->repeat)
3361 {
3362 ev_at (w) += w->repeat;
3363 if (ev_at (w) < mn_now)
3364 ev_at (w) = mn_now;
3365
1584 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3366 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1585 3367
1586 ev_at (w) += w->repeat; 3368 ANHE_at_cache (timers [HEAP0]);
1587 if (ev_at (w) < mn_now)
1588 ev_at (w) = mn_now;
1589
1590 downheap (timers, timercnt, HEAP0); 3369 downheap (timers, timercnt, HEAP0);
3370 }
3371 else
3372 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3373
3374 EV_FREQUENT_CHECK;
3375 feed_reverse (EV_A_ (W)w);
1591 } 3376 }
1592 else 3377 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1593 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1594 3378
1595 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 3379 feed_reverse_done (EV_A_ EV_TIMER);
1596 } 3380 }
1597} 3381}
1598 3382
1599#if EV_PERIODIC_ENABLE 3383#if EV_PERIODIC_ENABLE
1600void inline_size 3384
3385noinline
3386static void
3387periodic_recalc (EV_P_ ev_periodic *w)
3388{
3389 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3390 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3391
3392 /* the above almost always errs on the low side */
3393 while (at <= ev_rt_now)
3394 {
3395 ev_tstamp nat = at + w->interval;
3396
3397 /* when resolution fails us, we use ev_rt_now */
3398 if (expect_false (nat == at))
3399 {
3400 at = ev_rt_now;
3401 break;
3402 }
3403
3404 at = nat;
3405 }
3406
3407 ev_at (w) = at;
3408}
3409
3410/* make periodics pending */
3411inline_size void
1601periodics_reify (EV_P) 3412periodics_reify (EV_P)
1602{ 3413{
3414 EV_FREQUENT_CHECK;
3415
1603 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now) 3416 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1604 { 3417 {
1605 ev_periodic *w = (ev_periodic *)periodics [HEAP0]; 3418 do
1606
1607 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1608
1609 /* first reschedule or stop timer */
1610 if (w->reschedule_cb)
1611 { 3419 {
3420 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3421
3422 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3423
3424 /* first reschedule or stop timer */
3425 if (w->reschedule_cb)
3426 {
1612 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); 3427 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3428
1613 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now)); 3429 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3430
3431 ANHE_at_cache (periodics [HEAP0]);
1614 downheap (periodics, periodiccnt, 1); 3432 downheap (periodics, periodiccnt, HEAP0);
3433 }
3434 else if (w->interval)
3435 {
3436 periodic_recalc (EV_A_ w);
3437 ANHE_at_cache (periodics [HEAP0]);
3438 downheap (periodics, periodiccnt, HEAP0);
3439 }
3440 else
3441 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3442
3443 EV_FREQUENT_CHECK;
3444 feed_reverse (EV_A_ (W)w);
1615 } 3445 }
1616 else if (w->interval) 3446 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1617 {
1618 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1619 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1620 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1621 downheap (periodics, periodiccnt, HEAP0);
1622 }
1623 else
1624 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1625 3447
1626 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 3448 feed_reverse_done (EV_A_ EV_PERIODIC);
1627 } 3449 }
1628} 3450}
1629 3451
1630static void noinline 3452/* simply recalculate all periodics */
3453/* TODO: maybe ensure that at least one event happens when jumping forward? */
3454noinline ecb_cold
3455static void
1631periodics_reschedule (EV_P) 3456periodics_reschedule (EV_P)
1632{ 3457{
1633 int i; 3458 int i;
1634 3459
1635 /* adjust periodics after time jump */ 3460 /* adjust periodics after time jump */
1636 for (i = 1; i <= periodiccnt; ++i) 3461 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1637 { 3462 {
1638 ev_periodic *w = (ev_periodic *)periodics [i]; 3463 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1639 3464
1640 if (w->reschedule_cb) 3465 if (w->reschedule_cb)
1641 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3466 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1642 else if (w->interval) 3467 else if (w->interval)
1643 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3468 periodic_recalc (EV_A_ w);
3469
3470 ANHE_at_cache (periodics [i]);
3471 }
3472
3473 reheap (periodics, periodiccnt);
3474}
3475#endif
3476
3477/* adjust all timers by a given offset */
3478noinline ecb_cold
3479static void
3480timers_reschedule (EV_P_ ev_tstamp adjust)
3481{
3482 int i;
3483
3484 for (i = 0; i < timercnt; ++i)
1644 } 3485 {
1645 3486 ANHE *he = timers + i + HEAP0;
1646 /* now rebuild the heap */ 3487 ANHE_w (*he)->at += adjust;
1647 for (i = periodiccnt >> 1; --i; ) 3488 ANHE_at_cache (*he);
1648 downheap (periodics, periodiccnt, i + HEAP0); 3489 }
1649} 3490}
1650#endif
1651 3491
1652void inline_speed 3492/* fetch new monotonic and realtime times from the kernel */
3493/* also detect if there was a timejump, and act accordingly */
3494inline_speed void
1653time_update (EV_P_ ev_tstamp max_block) 3495time_update (EV_P_ ev_tstamp max_block)
1654{ 3496{
1655 int i;
1656
1657#if EV_USE_MONOTONIC 3497#if EV_USE_MONOTONIC
1658 if (expect_true (have_monotonic)) 3498 if (expect_true (have_monotonic))
1659 { 3499 {
3500 int i;
1660 ev_tstamp odiff = rtmn_diff; 3501 ev_tstamp odiff = rtmn_diff;
1661 3502
1662 mn_now = get_clock (); 3503 mn_now = get_clock ();
1663 3504
1664 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3505 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1680 * doesn't hurt either as we only do this on time-jumps or 3521 * doesn't hurt either as we only do this on time-jumps or
1681 * in the unlikely event of having been preempted here. 3522 * in the unlikely event of having been preempted here.
1682 */ 3523 */
1683 for (i = 4; --i; ) 3524 for (i = 4; --i; )
1684 { 3525 {
3526 ev_tstamp diff;
1685 rtmn_diff = ev_rt_now - mn_now; 3527 rtmn_diff = ev_rt_now - mn_now;
1686 3528
3529 diff = odiff - rtmn_diff;
3530
1687 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3531 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1688 return; /* all is well */ 3532 return; /* all is well */
1689 3533
1690 ev_rt_now = ev_time (); 3534 ev_rt_now = ev_time ();
1691 mn_now = get_clock (); 3535 mn_now = get_clock ();
1692 now_floor = mn_now; 3536 now_floor = mn_now;
1693 } 3537 }
1694 3538
3539 /* no timer adjustment, as the monotonic clock doesn't jump */
3540 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1695# if EV_PERIODIC_ENABLE 3541# if EV_PERIODIC_ENABLE
1696 periodics_reschedule (EV_A); 3542 periodics_reschedule (EV_A);
1697# endif 3543# endif
1698 /* no timer adjustment, as the monotonic clock doesn't jump */
1699 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1700 } 3544 }
1701 else 3545 else
1702#endif 3546#endif
1703 { 3547 {
1704 ev_rt_now = ev_time (); 3548 ev_rt_now = ev_time ();
1705 3549
1706 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3550 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1707 { 3551 {
3552 /* adjust timers. this is easy, as the offset is the same for all of them */
3553 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1708#if EV_PERIODIC_ENABLE 3554#if EV_PERIODIC_ENABLE
1709 periodics_reschedule (EV_A); 3555 periodics_reschedule (EV_A);
1710#endif 3556#endif
1711 /* adjust timers. this is easy, as the offset is the same for all of them */
1712 for (i = 1; i <= timercnt; ++i)
1713 ev_at (timers [i]) += ev_rt_now - mn_now;
1714 } 3557 }
1715 3558
1716 mn_now = ev_rt_now; 3559 mn_now = ev_rt_now;
1717 } 3560 }
1718} 3561}
1719 3562
1720void 3563int
1721ev_ref (EV_P)
1722{
1723 ++activecnt;
1724}
1725
1726void
1727ev_unref (EV_P)
1728{
1729 --activecnt;
1730}
1731
1732static int loop_done;
1733
1734void
1735ev_loop (EV_P_ int flags) 3564ev_run (EV_P_ int flags)
1736{ 3565{
3566#if EV_FEATURE_API
3567 ++loop_depth;
3568#endif
3569
3570 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3571
1737 loop_done = EVUNLOOP_CANCEL; 3572 loop_done = EVBREAK_CANCEL;
1738 3573
1739 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3574 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1740 3575
1741 do 3576 do
1742 { 3577 {
3578#if EV_VERIFY >= 2
3579 ev_verify (EV_A);
3580#endif
3581
1743#ifndef _WIN32 3582#ifndef _WIN32
1744 if (expect_false (curpid)) /* penalise the forking check even more */ 3583 if (expect_false (curpid)) /* penalise the forking check even more */
1745 if (expect_false (getpid () != curpid)) 3584 if (expect_false (getpid () != curpid))
1746 { 3585 {
1747 curpid = getpid (); 3586 curpid = getpid ();
… …
1753 /* we might have forked, so queue fork handlers */ 3592 /* we might have forked, so queue fork handlers */
1754 if (expect_false (postfork)) 3593 if (expect_false (postfork))
1755 if (forkcnt) 3594 if (forkcnt)
1756 { 3595 {
1757 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3596 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1758 call_pending (EV_A); 3597 EV_INVOKE_PENDING;
1759 } 3598 }
1760#endif 3599#endif
1761 3600
3601#if EV_PREPARE_ENABLE
1762 /* queue prepare watchers (and execute them) */ 3602 /* queue prepare watchers (and execute them) */
1763 if (expect_false (preparecnt)) 3603 if (expect_false (preparecnt))
1764 { 3604 {
1765 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3605 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1766 call_pending (EV_A); 3606 EV_INVOKE_PENDING;
1767 } 3607 }
3608#endif
1768 3609
1769 if (expect_false (!activecnt)) 3610 if (expect_false (loop_done))
1770 break; 3611 break;
1771 3612
1772 /* we might have forked, so reify kernel state if necessary */ 3613 /* we might have forked, so reify kernel state if necessary */
1773 if (expect_false (postfork)) 3614 if (expect_false (postfork))
1774 loop_fork (EV_A); 3615 loop_fork (EV_A);
… …
1779 /* calculate blocking time */ 3620 /* calculate blocking time */
1780 { 3621 {
1781 ev_tstamp waittime = 0.; 3622 ev_tstamp waittime = 0.;
1782 ev_tstamp sleeptime = 0.; 3623 ev_tstamp sleeptime = 0.;
1783 3624
3625 /* remember old timestamp for io_blocktime calculation */
3626 ev_tstamp prev_mn_now = mn_now;
3627
3628 /* update time to cancel out callback processing overhead */
3629 time_update (EV_A_ 1e100);
3630
3631 /* from now on, we want a pipe-wake-up */
3632 pipe_write_wanted = 1;
3633
3634 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3635
1784 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3636 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1785 { 3637 {
1786 /* update time to cancel out callback processing overhead */
1787 time_update (EV_A_ 1e100);
1788
1789 waittime = MAX_BLOCKTIME; 3638 waittime = MAX_BLOCKTIME;
1790 3639
1791 if (timercnt) 3640 if (timercnt)
1792 { 3641 {
1793 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge; 3642 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1794 if (waittime > to) waittime = to; 3643 if (waittime > to) waittime = to;
1795 } 3644 }
1796 3645
1797#if EV_PERIODIC_ENABLE 3646#if EV_PERIODIC_ENABLE
1798 if (periodiccnt) 3647 if (periodiccnt)
1799 { 3648 {
1800 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3649 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1801 if (waittime > to) waittime = to; 3650 if (waittime > to) waittime = to;
1802 } 3651 }
1803#endif 3652#endif
1804 3653
3654 /* don't let timeouts decrease the waittime below timeout_blocktime */
1805 if (expect_false (waittime < timeout_blocktime)) 3655 if (expect_false (waittime < timeout_blocktime))
1806 waittime = timeout_blocktime; 3656 waittime = timeout_blocktime;
1807 3657
1808 sleeptime = waittime - backend_fudge; 3658 /* at this point, we NEED to wait, so we have to ensure */
3659 /* to pass a minimum nonzero value to the backend */
3660 if (expect_false (waittime < backend_mintime))
3661 waittime = backend_mintime;
1809 3662
3663 /* extra check because io_blocktime is commonly 0 */
1810 if (expect_true (sleeptime > io_blocktime)) 3664 if (expect_false (io_blocktime))
1811 sleeptime = io_blocktime;
1812
1813 if (sleeptime)
1814 { 3665 {
3666 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3667
3668 if (sleeptime > waittime - backend_mintime)
3669 sleeptime = waittime - backend_mintime;
3670
3671 if (expect_true (sleeptime > 0.))
3672 {
1815 ev_sleep (sleeptime); 3673 ev_sleep (sleeptime);
1816 waittime -= sleeptime; 3674 waittime -= sleeptime;
3675 }
1817 } 3676 }
1818 } 3677 }
1819 3678
3679#if EV_FEATURE_API
1820 ++loop_count; 3680 ++loop_count;
3681#endif
3682 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1821 backend_poll (EV_A_ waittime); 3683 backend_poll (EV_A_ waittime);
3684 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3685
3686 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3687
3688 ECB_MEMORY_FENCE_ACQUIRE;
3689 if (pipe_write_skipped)
3690 {
3691 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3692 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3693 }
3694
1822 3695
1823 /* update ev_rt_now, do magic */ 3696 /* update ev_rt_now, do magic */
1824 time_update (EV_A_ waittime + sleeptime); 3697 time_update (EV_A_ waittime + sleeptime);
1825 } 3698 }
1826 3699
… …
1833#if EV_IDLE_ENABLE 3706#if EV_IDLE_ENABLE
1834 /* queue idle watchers unless other events are pending */ 3707 /* queue idle watchers unless other events are pending */
1835 idle_reify (EV_A); 3708 idle_reify (EV_A);
1836#endif 3709#endif
1837 3710
3711#if EV_CHECK_ENABLE
1838 /* queue check watchers, to be executed first */ 3712 /* queue check watchers, to be executed first */
1839 if (expect_false (checkcnt)) 3713 if (expect_false (checkcnt))
1840 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3714 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3715#endif
1841 3716
1842 call_pending (EV_A); 3717 EV_INVOKE_PENDING;
1843 } 3718 }
1844 while (expect_true ( 3719 while (expect_true (
1845 activecnt 3720 activecnt
1846 && !loop_done 3721 && !loop_done
1847 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3722 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1848 )); 3723 ));
1849 3724
1850 if (loop_done == EVUNLOOP_ONE) 3725 if (loop_done == EVBREAK_ONE)
1851 loop_done = EVUNLOOP_CANCEL; 3726 loop_done = EVBREAK_CANCEL;
1852}
1853 3727
3728#if EV_FEATURE_API
3729 --loop_depth;
3730#endif
3731
3732 return activecnt;
3733}
3734
1854void 3735void
1855ev_unloop (EV_P_ int how) 3736ev_break (EV_P_ int how) EV_THROW
1856{ 3737{
1857 loop_done = how; 3738 loop_done = how;
1858} 3739}
1859 3740
3741void
3742ev_ref (EV_P) EV_THROW
3743{
3744 ++activecnt;
3745}
3746
3747void
3748ev_unref (EV_P) EV_THROW
3749{
3750 --activecnt;
3751}
3752
3753void
3754ev_now_update (EV_P) EV_THROW
3755{
3756 time_update (EV_A_ 1e100);
3757}
3758
3759void
3760ev_suspend (EV_P) EV_THROW
3761{
3762 ev_now_update (EV_A);
3763}
3764
3765void
3766ev_resume (EV_P) EV_THROW
3767{
3768 ev_tstamp mn_prev = mn_now;
3769
3770 ev_now_update (EV_A);
3771 timers_reschedule (EV_A_ mn_now - mn_prev);
3772#if EV_PERIODIC_ENABLE
3773 /* TODO: really do this? */
3774 periodics_reschedule (EV_A);
3775#endif
3776}
3777
1860/*****************************************************************************/ 3778/*****************************************************************************/
3779/* singly-linked list management, used when the expected list length is short */
1861 3780
1862void inline_size 3781inline_size void
1863wlist_add (WL *head, WL elem) 3782wlist_add (WL *head, WL elem)
1864{ 3783{
1865 elem->next = *head; 3784 elem->next = *head;
1866 *head = elem; 3785 *head = elem;
1867} 3786}
1868 3787
1869void inline_size 3788inline_size void
1870wlist_del (WL *head, WL elem) 3789wlist_del (WL *head, WL elem)
1871{ 3790{
1872 while (*head) 3791 while (*head)
1873 { 3792 {
1874 if (*head == elem) 3793 if (expect_true (*head == elem))
1875 { 3794 {
1876 *head = elem->next; 3795 *head = elem->next;
1877 return; 3796 break;
1878 } 3797 }
1879 3798
1880 head = &(*head)->next; 3799 head = &(*head)->next;
1881 } 3800 }
1882} 3801}
1883 3802
1884void inline_speed 3803/* internal, faster, version of ev_clear_pending */
3804inline_speed void
1885clear_pending (EV_P_ W w) 3805clear_pending (EV_P_ W w)
1886{ 3806{
1887 if (w->pending) 3807 if (w->pending)
1888 { 3808 {
1889 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3809 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1890 w->pending = 0; 3810 w->pending = 0;
1891 } 3811 }
1892} 3812}
1893 3813
1894int 3814int
1895ev_clear_pending (EV_P_ void *w) 3815ev_clear_pending (EV_P_ void *w) EV_THROW
1896{ 3816{
1897 W w_ = (W)w; 3817 W w_ = (W)w;
1898 int pending = w_->pending; 3818 int pending = w_->pending;
1899 3819
1900 if (expect_true (pending)) 3820 if (expect_true (pending))
1901 { 3821 {
1902 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3822 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3823 p->w = (W)&pending_w;
1903 w_->pending = 0; 3824 w_->pending = 0;
1904 p->w = 0;
1905 return p->events; 3825 return p->events;
1906 } 3826 }
1907 else 3827 else
1908 return 0; 3828 return 0;
1909} 3829}
1910 3830
1911void inline_size 3831inline_size void
1912pri_adjust (EV_P_ W w) 3832pri_adjust (EV_P_ W w)
1913{ 3833{
1914 int pri = w->priority; 3834 int pri = ev_priority (w);
1915 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3835 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1916 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3836 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1917 w->priority = pri; 3837 ev_set_priority (w, pri);
1918} 3838}
1919 3839
1920void inline_speed 3840inline_speed void
1921ev_start (EV_P_ W w, int active) 3841ev_start (EV_P_ W w, int active)
1922{ 3842{
1923 pri_adjust (EV_A_ w); 3843 pri_adjust (EV_A_ w);
1924 w->active = active; 3844 w->active = active;
1925 ev_ref (EV_A); 3845 ev_ref (EV_A);
1926} 3846}
1927 3847
1928void inline_size 3848inline_size void
1929ev_stop (EV_P_ W w) 3849ev_stop (EV_P_ W w)
1930{ 3850{
1931 ev_unref (EV_A); 3851 ev_unref (EV_A);
1932 w->active = 0; 3852 w->active = 0;
1933} 3853}
1934 3854
1935/*****************************************************************************/ 3855/*****************************************************************************/
1936 3856
1937void noinline 3857noinline
3858void
1938ev_io_start (EV_P_ ev_io *w) 3859ev_io_start (EV_P_ ev_io *w) EV_THROW
1939{ 3860{
1940 int fd = w->fd; 3861 int fd = w->fd;
1941 3862
1942 if (expect_false (ev_is_active (w))) 3863 if (expect_false (ev_is_active (w)))
1943 return; 3864 return;
1944 3865
1945 assert (("ev_io_start called with negative fd", fd >= 0)); 3866 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3867 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3868
3869 EV_FREQUENT_CHECK;
1946 3870
1947 ev_start (EV_A_ (W)w, 1); 3871 ev_start (EV_A_ (W)w, 1);
1948 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3872 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1949 wlist_add (&anfds[fd].head, (WL)w); 3873 wlist_add (&anfds[fd].head, (WL)w);
1950 3874
3875 /* common bug, apparently */
3876 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3877
1951 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3878 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1952 w->events &= ~EV_IOFDSET; 3879 w->events &= ~EV__IOFDSET;
1953}
1954 3880
3881 EV_FREQUENT_CHECK;
3882}
3883
1955void noinline 3884noinline
3885void
1956ev_io_stop (EV_P_ ev_io *w) 3886ev_io_stop (EV_P_ ev_io *w) EV_THROW
1957{ 3887{
1958 clear_pending (EV_A_ (W)w); 3888 clear_pending (EV_A_ (W)w);
1959 if (expect_false (!ev_is_active (w))) 3889 if (expect_false (!ev_is_active (w)))
1960 return; 3890 return;
1961 3891
1962 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3892 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3893
3894 EV_FREQUENT_CHECK;
1963 3895
1964 wlist_del (&anfds[w->fd].head, (WL)w); 3896 wlist_del (&anfds[w->fd].head, (WL)w);
1965 ev_stop (EV_A_ (W)w); 3897 ev_stop (EV_A_ (W)w);
1966 3898
1967 fd_change (EV_A_ w->fd, 1); 3899 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1968}
1969 3900
3901 EV_FREQUENT_CHECK;
3902}
3903
1970void noinline 3904noinline
3905void
1971ev_timer_start (EV_P_ ev_timer *w) 3906ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1972{ 3907{
1973 if (expect_false (ev_is_active (w))) 3908 if (expect_false (ev_is_active (w)))
1974 return; 3909 return;
1975 3910
1976 ev_at (w) += mn_now; 3911 ev_at (w) += mn_now;
1977 3912
1978 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3913 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1979 3914
3915 EV_FREQUENT_CHECK;
3916
3917 ++timercnt;
1980 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1); 3918 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1981 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2); 3919 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1982 timers [ev_active (w)] = (WT)w; 3920 ANHE_w (timers [ev_active (w)]) = (WT)w;
3921 ANHE_at_cache (timers [ev_active (w)]);
1983 upheap (timers, ev_active (w)); 3922 upheap (timers, ev_active (w));
1984 3923
3924 EV_FREQUENT_CHECK;
3925
1985 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/ 3926 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1986} 3927}
1987 3928
1988void noinline 3929noinline
3930void
1989ev_timer_stop (EV_P_ ev_timer *w) 3931ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1990{ 3932{
1991 clear_pending (EV_A_ (W)w); 3933 clear_pending (EV_A_ (W)w);
1992 if (expect_false (!ev_is_active (w))) 3934 if (expect_false (!ev_is_active (w)))
1993 return; 3935 return;
1994 3936
3937 EV_FREQUENT_CHECK;
3938
1995 { 3939 {
1996 int active = ev_active (w); 3940 int active = ev_active (w);
1997 3941
1998 assert (("internal timer heap corruption", timers [active] == (WT)w)); 3942 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1999 3943
3944 --timercnt;
3945
2000 if (expect_true (active < timercnt + HEAP0 - 1)) 3946 if (expect_true (active < timercnt + HEAP0))
2001 { 3947 {
2002 timers [active] = timers [timercnt + HEAP0 - 1]; 3948 timers [active] = timers [timercnt + HEAP0];
2003 adjustheap (timers, timercnt, active); 3949 adjustheap (timers, timercnt, active);
2004 } 3950 }
2005
2006 --timercnt;
2007 } 3951 }
2008 3952
2009 ev_at (w) -= mn_now; 3953 ev_at (w) -= mn_now;
2010 3954
2011 ev_stop (EV_A_ (W)w); 3955 ev_stop (EV_A_ (W)w);
2012}
2013 3956
3957 EV_FREQUENT_CHECK;
3958}
3959
2014void noinline 3960noinline
3961void
2015ev_timer_again (EV_P_ ev_timer *w) 3962ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2016{ 3963{
3964 EV_FREQUENT_CHECK;
3965
3966 clear_pending (EV_A_ (W)w);
3967
2017 if (ev_is_active (w)) 3968 if (ev_is_active (w))
2018 { 3969 {
2019 if (w->repeat) 3970 if (w->repeat)
2020 { 3971 {
2021 ev_at (w) = mn_now + w->repeat; 3972 ev_at (w) = mn_now + w->repeat;
3973 ANHE_at_cache (timers [ev_active (w)]);
2022 adjustheap (timers, timercnt, ev_active (w)); 3974 adjustheap (timers, timercnt, ev_active (w));
2023 } 3975 }
2024 else 3976 else
2025 ev_timer_stop (EV_A_ w); 3977 ev_timer_stop (EV_A_ w);
2026 } 3978 }
2027 else if (w->repeat) 3979 else if (w->repeat)
2028 { 3980 {
2029 ev_at (w) = w->repeat; 3981 ev_at (w) = w->repeat;
2030 ev_timer_start (EV_A_ w); 3982 ev_timer_start (EV_A_ w);
2031 } 3983 }
3984
3985 EV_FREQUENT_CHECK;
3986}
3987
3988ev_tstamp
3989ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3990{
3991 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2032} 3992}
2033 3993
2034#if EV_PERIODIC_ENABLE 3994#if EV_PERIODIC_ENABLE
2035void noinline 3995noinline
3996void
2036ev_periodic_start (EV_P_ ev_periodic *w) 3997ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2037{ 3998{
2038 if (expect_false (ev_is_active (w))) 3999 if (expect_false (ev_is_active (w)))
2039 return; 4000 return;
2040 4001
2041 if (w->reschedule_cb) 4002 if (w->reschedule_cb)
2042 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4003 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2043 else if (w->interval) 4004 else if (w->interval)
2044 { 4005 {
2045 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4006 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2046 /* this formula differs from the one in periodic_reify because we do not always round up */ 4007 periodic_recalc (EV_A_ w);
2047 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2048 } 4008 }
2049 else 4009 else
2050 ev_at (w) = w->offset; 4010 ev_at (w) = w->offset;
2051 4011
4012 EV_FREQUENT_CHECK;
4013
4014 ++periodiccnt;
2052 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1); 4015 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2053 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2); 4016 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2054 periodics [ev_active (w)] = (WT)w; 4017 ANHE_w (periodics [ev_active (w)]) = (WT)w;
4018 ANHE_at_cache (periodics [ev_active (w)]);
2055 upheap (periodics, ev_active (w)); 4019 upheap (periodics, ev_active (w));
2056 4020
4021 EV_FREQUENT_CHECK;
4022
2057 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/ 4023 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2058} 4024}
2059 4025
2060void noinline 4026noinline
4027void
2061ev_periodic_stop (EV_P_ ev_periodic *w) 4028ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2062{ 4029{
2063 clear_pending (EV_A_ (W)w); 4030 clear_pending (EV_A_ (W)w);
2064 if (expect_false (!ev_is_active (w))) 4031 if (expect_false (!ev_is_active (w)))
2065 return; 4032 return;
2066 4033
4034 EV_FREQUENT_CHECK;
4035
2067 { 4036 {
2068 int active = ev_active (w); 4037 int active = ev_active (w);
2069 4038
2070 assert (("internal periodic heap corruption", periodics [active] == (WT)w)); 4039 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2071 4040
4041 --periodiccnt;
4042
2072 if (expect_true (active < periodiccnt + HEAP0 - 1)) 4043 if (expect_true (active < periodiccnt + HEAP0))
2073 { 4044 {
2074 periodics [active] = periodics [periodiccnt + HEAP0 - 1]; 4045 periodics [active] = periodics [periodiccnt + HEAP0];
2075 adjustheap (periodics, periodiccnt, active); 4046 adjustheap (periodics, periodiccnt, active);
2076 } 4047 }
2077
2078 --periodiccnt;
2079 } 4048 }
2080 4049
2081 ev_stop (EV_A_ (W)w); 4050 ev_stop (EV_A_ (W)w);
2082}
2083 4051
4052 EV_FREQUENT_CHECK;
4053}
4054
2084void noinline 4055noinline
4056void
2085ev_periodic_again (EV_P_ ev_periodic *w) 4057ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2086{ 4058{
2087 /* TODO: use adjustheap and recalculation */ 4059 /* TODO: use adjustheap and recalculation */
2088 ev_periodic_stop (EV_A_ w); 4060 ev_periodic_stop (EV_A_ w);
2089 ev_periodic_start (EV_A_ w); 4061 ev_periodic_start (EV_A_ w);
2090} 4062}
… …
2092 4064
2093#ifndef SA_RESTART 4065#ifndef SA_RESTART
2094# define SA_RESTART 0 4066# define SA_RESTART 0
2095#endif 4067#endif
2096 4068
4069#if EV_SIGNAL_ENABLE
4070
2097void noinline 4071noinline
4072void
2098ev_signal_start (EV_P_ ev_signal *w) 4073ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2099{ 4074{
2100#if EV_MULTIPLICITY
2101 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2102#endif
2103 if (expect_false (ev_is_active (w))) 4075 if (expect_false (ev_is_active (w)))
2104 return; 4076 return;
2105 4077
2106 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4078 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2107 4079
2108 evpipe_init (EV_A); 4080#if EV_MULTIPLICITY
4081 assert (("libev: a signal must not be attached to two different loops",
4082 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2109 4083
4084 signals [w->signum - 1].loop = EV_A;
4085 ECB_MEMORY_FENCE_RELEASE;
4086#endif
4087
4088 EV_FREQUENT_CHECK;
4089
4090#if EV_USE_SIGNALFD
4091 if (sigfd == -2)
2110 { 4092 {
2111#ifndef _WIN32 4093 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2112 sigset_t full, prev; 4094 if (sigfd < 0 && errno == EINVAL)
2113 sigfillset (&full); 4095 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2114 sigprocmask (SIG_SETMASK, &full, &prev);
2115#endif
2116 4096
2117 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4097 if (sigfd >= 0)
4098 {
4099 fd_intern (sigfd); /* doing it twice will not hurt */
2118 4100
2119#ifndef _WIN32 4101 sigemptyset (&sigfd_set);
2120 sigprocmask (SIG_SETMASK, &prev, 0); 4102
2121#endif 4103 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4104 ev_set_priority (&sigfd_w, EV_MAXPRI);
4105 ev_io_start (EV_A_ &sigfd_w);
4106 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4107 }
2122 } 4108 }
4109
4110 if (sigfd >= 0)
4111 {
4112 /* TODO: check .head */
4113 sigaddset (&sigfd_set, w->signum);
4114 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4115
4116 signalfd (sigfd, &sigfd_set, 0);
4117 }
4118#endif
2123 4119
2124 ev_start (EV_A_ (W)w, 1); 4120 ev_start (EV_A_ (W)w, 1);
2125 wlist_add (&signals [w->signum - 1].head, (WL)w); 4121 wlist_add (&signals [w->signum - 1].head, (WL)w);
2126 4122
2127 if (!((WL)w)->next) 4123 if (!((WL)w)->next)
4124# if EV_USE_SIGNALFD
4125 if (sigfd < 0) /*TODO*/
4126# endif
2128 { 4127 {
2129#if _WIN32 4128# ifdef _WIN32
4129 evpipe_init (EV_A);
4130
2130 signal (w->signum, ev_sighandler); 4131 signal (w->signum, ev_sighandler);
2131#else 4132# else
2132 struct sigaction sa; 4133 struct sigaction sa;
4134
4135 evpipe_init (EV_A);
4136
2133 sa.sa_handler = ev_sighandler; 4137 sa.sa_handler = ev_sighandler;
2134 sigfillset (&sa.sa_mask); 4138 sigfillset (&sa.sa_mask);
2135 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4139 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2136 sigaction (w->signum, &sa, 0); 4140 sigaction (w->signum, &sa, 0);
4141
4142 if (origflags & EVFLAG_NOSIGMASK)
4143 {
4144 sigemptyset (&sa.sa_mask);
4145 sigaddset (&sa.sa_mask, w->signum);
4146 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4147 }
2137#endif 4148#endif
2138 } 4149 }
2139}
2140 4150
4151 EV_FREQUENT_CHECK;
4152}
4153
2141void noinline 4154noinline
4155void
2142ev_signal_stop (EV_P_ ev_signal *w) 4156ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2143{ 4157{
2144 clear_pending (EV_A_ (W)w); 4158 clear_pending (EV_A_ (W)w);
2145 if (expect_false (!ev_is_active (w))) 4159 if (expect_false (!ev_is_active (w)))
2146 return; 4160 return;
2147 4161
4162 EV_FREQUENT_CHECK;
4163
2148 wlist_del (&signals [w->signum - 1].head, (WL)w); 4164 wlist_del (&signals [w->signum - 1].head, (WL)w);
2149 ev_stop (EV_A_ (W)w); 4165 ev_stop (EV_A_ (W)w);
2150 4166
2151 if (!signals [w->signum - 1].head) 4167 if (!signals [w->signum - 1].head)
2152 signal (w->signum, SIG_DFL); 4168 {
2153}
2154
2155void
2156ev_child_start (EV_P_ ev_child *w)
2157{
2158#if EV_MULTIPLICITY 4169#if EV_MULTIPLICITY
4170 signals [w->signum - 1].loop = 0; /* unattach from signal */
4171#endif
4172#if EV_USE_SIGNALFD
4173 if (sigfd >= 0)
4174 {
4175 sigset_t ss;
4176
4177 sigemptyset (&ss);
4178 sigaddset (&ss, w->signum);
4179 sigdelset (&sigfd_set, w->signum);
4180
4181 signalfd (sigfd, &sigfd_set, 0);
4182 sigprocmask (SIG_UNBLOCK, &ss, 0);
4183 }
4184 else
4185#endif
4186 signal (w->signum, SIG_DFL);
4187 }
4188
4189 EV_FREQUENT_CHECK;
4190}
4191
4192#endif
4193
4194#if EV_CHILD_ENABLE
4195
4196void
4197ev_child_start (EV_P_ ev_child *w) EV_THROW
4198{
4199#if EV_MULTIPLICITY
2159 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4200 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2160#endif 4201#endif
2161 if (expect_false (ev_is_active (w))) 4202 if (expect_false (ev_is_active (w)))
2162 return; 4203 return;
2163 4204
4205 EV_FREQUENT_CHECK;
4206
2164 ev_start (EV_A_ (W)w, 1); 4207 ev_start (EV_A_ (W)w, 1);
2165 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4208 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2166}
2167 4209
4210 EV_FREQUENT_CHECK;
4211}
4212
2168void 4213void
2169ev_child_stop (EV_P_ ev_child *w) 4214ev_child_stop (EV_P_ ev_child *w) EV_THROW
2170{ 4215{
2171 clear_pending (EV_A_ (W)w); 4216 clear_pending (EV_A_ (W)w);
2172 if (expect_false (!ev_is_active (w))) 4217 if (expect_false (!ev_is_active (w)))
2173 return; 4218 return;
2174 4219
4220 EV_FREQUENT_CHECK;
4221
2175 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4222 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2176 ev_stop (EV_A_ (W)w); 4223 ev_stop (EV_A_ (W)w);
4224
4225 EV_FREQUENT_CHECK;
2177} 4226}
4227
4228#endif
2178 4229
2179#if EV_STAT_ENABLE 4230#if EV_STAT_ENABLE
2180 4231
2181# ifdef _WIN32 4232# ifdef _WIN32
2182# undef lstat 4233# undef lstat
2183# define lstat(a,b) _stati64 (a,b) 4234# define lstat(a,b) _stati64 (a,b)
2184# endif 4235# endif
2185 4236
2186#define DEF_STAT_INTERVAL 5.0074891 4237#define DEF_STAT_INTERVAL 5.0074891
4238#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2187#define MIN_STAT_INTERVAL 0.1074891 4239#define MIN_STAT_INTERVAL 0.1074891
2188 4240
2189static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4241noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2190 4242
2191#if EV_USE_INOTIFY 4243#if EV_USE_INOTIFY
2192# define EV_INOTIFY_BUFSIZE 8192
2193 4244
2194static void noinline 4245/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4246# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4247
4248noinline
4249static void
2195infy_add (EV_P_ ev_stat *w) 4250infy_add (EV_P_ ev_stat *w)
2196{ 4251{
2197 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); 4252 w->wd = inotify_add_watch (fs_fd, w->path,
4253 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4254 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4255 | IN_DONT_FOLLOW | IN_MASK_ADD);
2198 4256
2199 if (w->wd < 0) 4257 if (w->wd >= 0)
4258 {
4259 struct statfs sfs;
4260
4261 /* now local changes will be tracked by inotify, but remote changes won't */
4262 /* unless the filesystem is known to be local, we therefore still poll */
4263 /* also do poll on <2.6.25, but with normal frequency */
4264
4265 if (!fs_2625)
4266 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4267 else if (!statfs (w->path, &sfs)
4268 && (sfs.f_type == 0x1373 /* devfs */
4269 || sfs.f_type == 0x4006 /* fat */
4270 || sfs.f_type == 0x4d44 /* msdos */
4271 || sfs.f_type == 0xEF53 /* ext2/3 */
4272 || sfs.f_type == 0x72b6 /* jffs2 */
4273 || sfs.f_type == 0x858458f6 /* ramfs */
4274 || sfs.f_type == 0x5346544e /* ntfs */
4275 || sfs.f_type == 0x3153464a /* jfs */
4276 || sfs.f_type == 0x9123683e /* btrfs */
4277 || sfs.f_type == 0x52654973 /* reiser3 */
4278 || sfs.f_type == 0x01021994 /* tmpfs */
4279 || sfs.f_type == 0x58465342 /* xfs */))
4280 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4281 else
4282 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2200 { 4283 }
2201 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4284 else
4285 {
4286 /* can't use inotify, continue to stat */
4287 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2202 4288
2203 /* monitor some parent directory for speedup hints */ 4289 /* if path is not there, monitor some parent directory for speedup hints */
2204 /* note that exceeding the hardcoded limit is not a correctness issue, */ 4290 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2205 /* but an efficiency issue only */ 4291 /* but an efficiency issue only */
2206 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4292 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2207 { 4293 {
2208 char path [4096]; 4294 char path [4096];
2209 strcpy (path, w->path); 4295 strcpy (path, w->path);
… …
2213 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4299 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2214 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4300 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2215 4301
2216 char *pend = strrchr (path, '/'); 4302 char *pend = strrchr (path, '/');
2217 4303
2218 if (!pend) 4304 if (!pend || pend == path)
2219 break; /* whoops, no '/', complain to your admin */ 4305 break;
2220 4306
2221 *pend = 0; 4307 *pend = 0;
2222 w->wd = inotify_add_watch (fs_fd, path, mask); 4308 w->wd = inotify_add_watch (fs_fd, path, mask);
2223 } 4309 }
2224 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4310 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2225 } 4311 }
2226 } 4312 }
2227 else
2228 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2229 4313
2230 if (w->wd >= 0) 4314 if (w->wd >= 0)
2231 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4315 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2232}
2233 4316
2234static void noinline 4317 /* now re-arm timer, if required */
4318 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4319 ev_timer_again (EV_A_ &w->timer);
4320 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4321}
4322
4323noinline
4324static void
2235infy_del (EV_P_ ev_stat *w) 4325infy_del (EV_P_ ev_stat *w)
2236{ 4326{
2237 int slot; 4327 int slot;
2238 int wd = w->wd; 4328 int wd = w->wd;
2239 4329
2240 if (wd < 0) 4330 if (wd < 0)
2241 return; 4331 return;
2242 4332
2243 w->wd = -2; 4333 w->wd = -2;
2244 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4334 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2245 wlist_del (&fs_hash [slot].head, (WL)w); 4335 wlist_del (&fs_hash [slot].head, (WL)w);
2246 4336
2247 /* remove this watcher, if others are watching it, they will rearm */ 4337 /* remove this watcher, if others are watching it, they will rearm */
2248 inotify_rm_watch (fs_fd, wd); 4338 inotify_rm_watch (fs_fd, wd);
2249} 4339}
2250 4340
2251static void noinline 4341noinline
4342static void
2252infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4343infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2253{ 4344{
2254 if (slot < 0) 4345 if (slot < 0)
2255 /* overflow, need to check for all hahs slots */ 4346 /* overflow, need to check for all hash slots */
2256 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4347 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2257 infy_wd (EV_A_ slot, wd, ev); 4348 infy_wd (EV_A_ slot, wd, ev);
2258 else 4349 else
2259 { 4350 {
2260 WL w_; 4351 WL w_;
2261 4352
2262 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4353 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2263 { 4354 {
2264 ev_stat *w = (ev_stat *)w_; 4355 ev_stat *w = (ev_stat *)w_;
2265 w_ = w_->next; /* lets us remove this watcher and all before it */ 4356 w_ = w_->next; /* lets us remove this watcher and all before it */
2266 4357
2267 if (w->wd == wd || wd == -1) 4358 if (w->wd == wd || wd == -1)
2268 { 4359 {
2269 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4360 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2270 { 4361 {
4362 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2271 w->wd = -1; 4363 w->wd = -1;
2272 infy_add (EV_A_ w); /* re-add, no matter what */ 4364 infy_add (EV_A_ w); /* re-add, no matter what */
2273 } 4365 }
2274 4366
2275 stat_timer_cb (EV_A_ &w->timer, 0); 4367 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2280 4372
2281static void 4373static void
2282infy_cb (EV_P_ ev_io *w, int revents) 4374infy_cb (EV_P_ ev_io *w, int revents)
2283{ 4375{
2284 char buf [EV_INOTIFY_BUFSIZE]; 4376 char buf [EV_INOTIFY_BUFSIZE];
2285 struct inotify_event *ev = (struct inotify_event *)buf;
2286 int ofs; 4377 int ofs;
2287 int len = read (fs_fd, buf, sizeof (buf)); 4378 int len = read (fs_fd, buf, sizeof (buf));
2288 4379
2289 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4380 for (ofs = 0; ofs < len; )
4381 {
4382 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2290 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4383 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4384 ofs += sizeof (struct inotify_event) + ev->len;
4385 }
2291} 4386}
2292 4387
2293void inline_size 4388inline_size ecb_cold
4389void
4390ev_check_2625 (EV_P)
4391{
4392 /* kernels < 2.6.25 are borked
4393 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4394 */
4395 if (ev_linux_version () < 0x020619)
4396 return;
4397
4398 fs_2625 = 1;
4399}
4400
4401inline_size int
4402infy_newfd (void)
4403{
4404#if defined IN_CLOEXEC && defined IN_NONBLOCK
4405 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4406 if (fd >= 0)
4407 return fd;
4408#endif
4409 return inotify_init ();
4410}
4411
4412inline_size void
2294infy_init (EV_P) 4413infy_init (EV_P)
2295{ 4414{
2296 if (fs_fd != -2) 4415 if (fs_fd != -2)
2297 return; 4416 return;
2298 4417
4418 fs_fd = -1;
4419
4420 ev_check_2625 (EV_A);
4421
2299 fs_fd = inotify_init (); 4422 fs_fd = infy_newfd ();
2300 4423
2301 if (fs_fd >= 0) 4424 if (fs_fd >= 0)
2302 { 4425 {
4426 fd_intern (fs_fd);
2303 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4427 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2304 ev_set_priority (&fs_w, EV_MAXPRI); 4428 ev_set_priority (&fs_w, EV_MAXPRI);
2305 ev_io_start (EV_A_ &fs_w); 4429 ev_io_start (EV_A_ &fs_w);
4430 ev_unref (EV_A);
2306 } 4431 }
2307} 4432}
2308 4433
2309void inline_size 4434inline_size void
2310infy_fork (EV_P) 4435infy_fork (EV_P)
2311{ 4436{
2312 int slot; 4437 int slot;
2313 4438
2314 if (fs_fd < 0) 4439 if (fs_fd < 0)
2315 return; 4440 return;
2316 4441
4442 ev_ref (EV_A);
4443 ev_io_stop (EV_A_ &fs_w);
2317 close (fs_fd); 4444 close (fs_fd);
2318 fs_fd = inotify_init (); 4445 fs_fd = infy_newfd ();
2319 4446
4447 if (fs_fd >= 0)
4448 {
4449 fd_intern (fs_fd);
4450 ev_io_set (&fs_w, fs_fd, EV_READ);
4451 ev_io_start (EV_A_ &fs_w);
4452 ev_unref (EV_A);
4453 }
4454
2320 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4455 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2321 { 4456 {
2322 WL w_ = fs_hash [slot].head; 4457 WL w_ = fs_hash [slot].head;
2323 fs_hash [slot].head = 0; 4458 fs_hash [slot].head = 0;
2324 4459
2325 while (w_) 4460 while (w_)
… …
2330 w->wd = -1; 4465 w->wd = -1;
2331 4466
2332 if (fs_fd >= 0) 4467 if (fs_fd >= 0)
2333 infy_add (EV_A_ w); /* re-add, no matter what */ 4468 infy_add (EV_A_ w); /* re-add, no matter what */
2334 else 4469 else
4470 {
4471 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4472 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2335 ev_timer_start (EV_A_ &w->timer); 4473 ev_timer_again (EV_A_ &w->timer);
4474 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4475 }
2336 } 4476 }
2337
2338 } 4477 }
2339} 4478}
2340 4479
2341#endif 4480#endif
2342 4481
4482#ifdef _WIN32
4483# define EV_LSTAT(p,b) _stati64 (p, b)
4484#else
4485# define EV_LSTAT(p,b) lstat (p, b)
4486#endif
4487
2343void 4488void
2344ev_stat_stat (EV_P_ ev_stat *w) 4489ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2345{ 4490{
2346 if (lstat (w->path, &w->attr) < 0) 4491 if (lstat (w->path, &w->attr) < 0)
2347 w->attr.st_nlink = 0; 4492 w->attr.st_nlink = 0;
2348 else if (!w->attr.st_nlink) 4493 else if (!w->attr.st_nlink)
2349 w->attr.st_nlink = 1; 4494 w->attr.st_nlink = 1;
2350} 4495}
2351 4496
2352static void noinline 4497noinline
4498static void
2353stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4499stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2354{ 4500{
2355 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4501 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2356 4502
2357 /* we copy this here each the time so that */ 4503 ev_statdata prev = w->attr;
2358 /* prev has the old value when the callback gets invoked */
2359 w->prev = w->attr;
2360 ev_stat_stat (EV_A_ w); 4504 ev_stat_stat (EV_A_ w);
2361 4505
2362 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4506 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2363 if ( 4507 if (
2364 w->prev.st_dev != w->attr.st_dev 4508 prev.st_dev != w->attr.st_dev
2365 || w->prev.st_ino != w->attr.st_ino 4509 || prev.st_ino != w->attr.st_ino
2366 || w->prev.st_mode != w->attr.st_mode 4510 || prev.st_mode != w->attr.st_mode
2367 || w->prev.st_nlink != w->attr.st_nlink 4511 || prev.st_nlink != w->attr.st_nlink
2368 || w->prev.st_uid != w->attr.st_uid 4512 || prev.st_uid != w->attr.st_uid
2369 || w->prev.st_gid != w->attr.st_gid 4513 || prev.st_gid != w->attr.st_gid
2370 || w->prev.st_rdev != w->attr.st_rdev 4514 || prev.st_rdev != w->attr.st_rdev
2371 || w->prev.st_size != w->attr.st_size 4515 || prev.st_size != w->attr.st_size
2372 || w->prev.st_atime != w->attr.st_atime 4516 || prev.st_atime != w->attr.st_atime
2373 || w->prev.st_mtime != w->attr.st_mtime 4517 || prev.st_mtime != w->attr.st_mtime
2374 || w->prev.st_ctime != w->attr.st_ctime 4518 || prev.st_ctime != w->attr.st_ctime
2375 ) { 4519 ) {
4520 /* we only update w->prev on actual differences */
4521 /* in case we test more often than invoke the callback, */
4522 /* to ensure that prev is always different to attr */
4523 w->prev = prev;
4524
2376 #if EV_USE_INOTIFY 4525 #if EV_USE_INOTIFY
4526 if (fs_fd >= 0)
4527 {
2377 infy_del (EV_A_ w); 4528 infy_del (EV_A_ w);
2378 infy_add (EV_A_ w); 4529 infy_add (EV_A_ w);
2379 ev_stat_stat (EV_A_ w); /* avoid race... */ 4530 ev_stat_stat (EV_A_ w); /* avoid race... */
4531 }
2380 #endif 4532 #endif
2381 4533
2382 ev_feed_event (EV_A_ w, EV_STAT); 4534 ev_feed_event (EV_A_ w, EV_STAT);
2383 } 4535 }
2384} 4536}
2385 4537
2386void 4538void
2387ev_stat_start (EV_P_ ev_stat *w) 4539ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2388{ 4540{
2389 if (expect_false (ev_is_active (w))) 4541 if (expect_false (ev_is_active (w)))
2390 return; 4542 return;
2391 4543
2392 /* since we use memcmp, we need to clear any padding data etc. */
2393 memset (&w->prev, 0, sizeof (ev_statdata));
2394 memset (&w->attr, 0, sizeof (ev_statdata));
2395
2396 ev_stat_stat (EV_A_ w); 4544 ev_stat_stat (EV_A_ w);
2397 4545
4546 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2398 if (w->interval < MIN_STAT_INTERVAL) 4547 w->interval = MIN_STAT_INTERVAL;
2399 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2400 4548
2401 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4549 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2402 ev_set_priority (&w->timer, ev_priority (w)); 4550 ev_set_priority (&w->timer, ev_priority (w));
2403 4551
2404#if EV_USE_INOTIFY 4552#if EV_USE_INOTIFY
2405 infy_init (EV_A); 4553 infy_init (EV_A);
2406 4554
2407 if (fs_fd >= 0) 4555 if (fs_fd >= 0)
2408 infy_add (EV_A_ w); 4556 infy_add (EV_A_ w);
2409 else 4557 else
2410#endif 4558#endif
4559 {
2411 ev_timer_start (EV_A_ &w->timer); 4560 ev_timer_again (EV_A_ &w->timer);
4561 ev_unref (EV_A);
4562 }
2412 4563
2413 ev_start (EV_A_ (W)w, 1); 4564 ev_start (EV_A_ (W)w, 1);
2414}
2415 4565
4566 EV_FREQUENT_CHECK;
4567}
4568
2416void 4569void
2417ev_stat_stop (EV_P_ ev_stat *w) 4570ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2418{ 4571{
2419 clear_pending (EV_A_ (W)w); 4572 clear_pending (EV_A_ (W)w);
2420 if (expect_false (!ev_is_active (w))) 4573 if (expect_false (!ev_is_active (w)))
2421 return; 4574 return;
2422 4575
4576 EV_FREQUENT_CHECK;
4577
2423#if EV_USE_INOTIFY 4578#if EV_USE_INOTIFY
2424 infy_del (EV_A_ w); 4579 infy_del (EV_A_ w);
2425#endif 4580#endif
4581
4582 if (ev_is_active (&w->timer))
4583 {
4584 ev_ref (EV_A);
2426 ev_timer_stop (EV_A_ &w->timer); 4585 ev_timer_stop (EV_A_ &w->timer);
4586 }
2427 4587
2428 ev_stop (EV_A_ (W)w); 4588 ev_stop (EV_A_ (W)w);
4589
4590 EV_FREQUENT_CHECK;
2429} 4591}
2430#endif 4592#endif
2431 4593
2432#if EV_IDLE_ENABLE 4594#if EV_IDLE_ENABLE
2433void 4595void
2434ev_idle_start (EV_P_ ev_idle *w) 4596ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2435{ 4597{
2436 if (expect_false (ev_is_active (w))) 4598 if (expect_false (ev_is_active (w)))
2437 return; 4599 return;
2438 4600
2439 pri_adjust (EV_A_ (W)w); 4601 pri_adjust (EV_A_ (W)w);
4602
4603 EV_FREQUENT_CHECK;
2440 4604
2441 { 4605 {
2442 int active = ++idlecnt [ABSPRI (w)]; 4606 int active = ++idlecnt [ABSPRI (w)];
2443 4607
2444 ++idleall; 4608 ++idleall;
2445 ev_start (EV_A_ (W)w, active); 4609 ev_start (EV_A_ (W)w, active);
2446 4610
2447 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4611 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2448 idles [ABSPRI (w)][active - 1] = w; 4612 idles [ABSPRI (w)][active - 1] = w;
2449 } 4613 }
2450}
2451 4614
4615 EV_FREQUENT_CHECK;
4616}
4617
2452void 4618void
2453ev_idle_stop (EV_P_ ev_idle *w) 4619ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2454{ 4620{
2455 clear_pending (EV_A_ (W)w); 4621 clear_pending (EV_A_ (W)w);
2456 if (expect_false (!ev_is_active (w))) 4622 if (expect_false (!ev_is_active (w)))
2457 return; 4623 return;
2458 4624
4625 EV_FREQUENT_CHECK;
4626
2459 { 4627 {
2460 int active = ev_active (w); 4628 int active = ev_active (w);
2461 4629
2462 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4630 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2463 ev_active (idles [ABSPRI (w)][active - 1]) = active; 4631 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2464 4632
2465 ev_stop (EV_A_ (W)w); 4633 ev_stop (EV_A_ (W)w);
2466 --idleall; 4634 --idleall;
2467 } 4635 }
2468}
2469#endif
2470 4636
4637 EV_FREQUENT_CHECK;
4638}
4639#endif
4640
4641#if EV_PREPARE_ENABLE
2471void 4642void
2472ev_prepare_start (EV_P_ ev_prepare *w) 4643ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2473{ 4644{
2474 if (expect_false (ev_is_active (w))) 4645 if (expect_false (ev_is_active (w)))
2475 return; 4646 return;
4647
4648 EV_FREQUENT_CHECK;
2476 4649
2477 ev_start (EV_A_ (W)w, ++preparecnt); 4650 ev_start (EV_A_ (W)w, ++preparecnt);
2478 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4651 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2479 prepares [preparecnt - 1] = w; 4652 prepares [preparecnt - 1] = w;
2480}
2481 4653
4654 EV_FREQUENT_CHECK;
4655}
4656
2482void 4657void
2483ev_prepare_stop (EV_P_ ev_prepare *w) 4658ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2484{ 4659{
2485 clear_pending (EV_A_ (W)w); 4660 clear_pending (EV_A_ (W)w);
2486 if (expect_false (!ev_is_active (w))) 4661 if (expect_false (!ev_is_active (w)))
2487 return; 4662 return;
2488 4663
4664 EV_FREQUENT_CHECK;
4665
2489 { 4666 {
2490 int active = ev_active (w); 4667 int active = ev_active (w);
2491 4668
2492 prepares [active - 1] = prepares [--preparecnt]; 4669 prepares [active - 1] = prepares [--preparecnt];
2493 ev_active (prepares [active - 1]) = active; 4670 ev_active (prepares [active - 1]) = active;
2494 } 4671 }
2495 4672
2496 ev_stop (EV_A_ (W)w); 4673 ev_stop (EV_A_ (W)w);
2497}
2498 4674
4675 EV_FREQUENT_CHECK;
4676}
4677#endif
4678
4679#if EV_CHECK_ENABLE
2499void 4680void
2500ev_check_start (EV_P_ ev_check *w) 4681ev_check_start (EV_P_ ev_check *w) EV_THROW
2501{ 4682{
2502 if (expect_false (ev_is_active (w))) 4683 if (expect_false (ev_is_active (w)))
2503 return; 4684 return;
4685
4686 EV_FREQUENT_CHECK;
2504 4687
2505 ev_start (EV_A_ (W)w, ++checkcnt); 4688 ev_start (EV_A_ (W)w, ++checkcnt);
2506 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4689 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2507 checks [checkcnt - 1] = w; 4690 checks [checkcnt - 1] = w;
2508}
2509 4691
4692 EV_FREQUENT_CHECK;
4693}
4694
2510void 4695void
2511ev_check_stop (EV_P_ ev_check *w) 4696ev_check_stop (EV_P_ ev_check *w) EV_THROW
2512{ 4697{
2513 clear_pending (EV_A_ (W)w); 4698 clear_pending (EV_A_ (W)w);
2514 if (expect_false (!ev_is_active (w))) 4699 if (expect_false (!ev_is_active (w)))
2515 return; 4700 return;
2516 4701
4702 EV_FREQUENT_CHECK;
4703
2517 { 4704 {
2518 int active = ev_active (w); 4705 int active = ev_active (w);
2519 4706
2520 checks [active - 1] = checks [--checkcnt]; 4707 checks [active - 1] = checks [--checkcnt];
2521 ev_active (checks [active - 1]) = active; 4708 ev_active (checks [active - 1]) = active;
2522 } 4709 }
2523 4710
2524 ev_stop (EV_A_ (W)w); 4711 ev_stop (EV_A_ (W)w);
4712
4713 EV_FREQUENT_CHECK;
2525} 4714}
4715#endif
2526 4716
2527#if EV_EMBED_ENABLE 4717#if EV_EMBED_ENABLE
2528void noinline 4718noinline
4719void
2529ev_embed_sweep (EV_P_ ev_embed *w) 4720ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2530{ 4721{
2531 ev_loop (w->other, EVLOOP_NONBLOCK); 4722 ev_run (w->other, EVRUN_NOWAIT);
2532} 4723}
2533 4724
2534static void 4725static void
2535embed_io_cb (EV_P_ ev_io *io, int revents) 4726embed_io_cb (EV_P_ ev_io *io, int revents)
2536{ 4727{
2537 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4728 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2538 4729
2539 if (ev_cb (w)) 4730 if (ev_cb (w))
2540 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4731 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2541 else 4732 else
2542 ev_loop (w->other, EVLOOP_NONBLOCK); 4733 ev_run (w->other, EVRUN_NOWAIT);
2543} 4734}
2544 4735
2545static void 4736static void
2546embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4737embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2547{ 4738{
2548 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4739 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2549 4740
2550 { 4741 {
2551 struct ev_loop *loop = w->other; 4742 EV_P = w->other;
2552 4743
2553 while (fdchangecnt) 4744 while (fdchangecnt)
2554 { 4745 {
2555 fd_reify (EV_A); 4746 fd_reify (EV_A);
2556 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4747 ev_run (EV_A_ EVRUN_NOWAIT);
2557 } 4748 }
2558 } 4749 }
4750}
4751
4752static void
4753embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4754{
4755 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4756
4757 ev_embed_stop (EV_A_ w);
4758
4759 {
4760 EV_P = w->other;
4761
4762 ev_loop_fork (EV_A);
4763 ev_run (EV_A_ EVRUN_NOWAIT);
4764 }
4765
4766 ev_embed_start (EV_A_ w);
2559} 4767}
2560 4768
2561#if 0 4769#if 0
2562static void 4770static void
2563embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4771embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2565 ev_idle_stop (EV_A_ idle); 4773 ev_idle_stop (EV_A_ idle);
2566} 4774}
2567#endif 4775#endif
2568 4776
2569void 4777void
2570ev_embed_start (EV_P_ ev_embed *w) 4778ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2571{ 4779{
2572 if (expect_false (ev_is_active (w))) 4780 if (expect_false (ev_is_active (w)))
2573 return; 4781 return;
2574 4782
2575 { 4783 {
2576 struct ev_loop *loop = w->other; 4784 EV_P = w->other;
2577 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4785 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2578 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4786 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2579 } 4787 }
4788
4789 EV_FREQUENT_CHECK;
2580 4790
2581 ev_set_priority (&w->io, ev_priority (w)); 4791 ev_set_priority (&w->io, ev_priority (w));
2582 ev_io_start (EV_A_ &w->io); 4792 ev_io_start (EV_A_ &w->io);
2583 4793
2584 ev_prepare_init (&w->prepare, embed_prepare_cb); 4794 ev_prepare_init (&w->prepare, embed_prepare_cb);
2585 ev_set_priority (&w->prepare, EV_MINPRI); 4795 ev_set_priority (&w->prepare, EV_MINPRI);
2586 ev_prepare_start (EV_A_ &w->prepare); 4796 ev_prepare_start (EV_A_ &w->prepare);
2587 4797
4798 ev_fork_init (&w->fork, embed_fork_cb);
4799 ev_fork_start (EV_A_ &w->fork);
4800
2588 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4801 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2589 4802
2590 ev_start (EV_A_ (W)w, 1); 4803 ev_start (EV_A_ (W)w, 1);
2591}
2592 4804
4805 EV_FREQUENT_CHECK;
4806}
4807
2593void 4808void
2594ev_embed_stop (EV_P_ ev_embed *w) 4809ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2595{ 4810{
2596 clear_pending (EV_A_ (W)w); 4811 clear_pending (EV_A_ (W)w);
2597 if (expect_false (!ev_is_active (w))) 4812 if (expect_false (!ev_is_active (w)))
2598 return; 4813 return;
2599 4814
4815 EV_FREQUENT_CHECK;
4816
2600 ev_io_stop (EV_A_ &w->io); 4817 ev_io_stop (EV_A_ &w->io);
2601 ev_prepare_stop (EV_A_ &w->prepare); 4818 ev_prepare_stop (EV_A_ &w->prepare);
4819 ev_fork_stop (EV_A_ &w->fork);
2602 4820
2603 ev_stop (EV_A_ (W)w); 4821 ev_stop (EV_A_ (W)w);
4822
4823 EV_FREQUENT_CHECK;
2604} 4824}
2605#endif 4825#endif
2606 4826
2607#if EV_FORK_ENABLE 4827#if EV_FORK_ENABLE
2608void 4828void
2609ev_fork_start (EV_P_ ev_fork *w) 4829ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2610{ 4830{
2611 if (expect_false (ev_is_active (w))) 4831 if (expect_false (ev_is_active (w)))
2612 return; 4832 return;
4833
4834 EV_FREQUENT_CHECK;
2613 4835
2614 ev_start (EV_A_ (W)w, ++forkcnt); 4836 ev_start (EV_A_ (W)w, ++forkcnt);
2615 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4837 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2616 forks [forkcnt - 1] = w; 4838 forks [forkcnt - 1] = w;
2617}
2618 4839
4840 EV_FREQUENT_CHECK;
4841}
4842
2619void 4843void
2620ev_fork_stop (EV_P_ ev_fork *w) 4844ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2621{ 4845{
2622 clear_pending (EV_A_ (W)w); 4846 clear_pending (EV_A_ (W)w);
2623 if (expect_false (!ev_is_active (w))) 4847 if (expect_false (!ev_is_active (w)))
2624 return; 4848 return;
2625 4849
4850 EV_FREQUENT_CHECK;
4851
2626 { 4852 {
2627 int active = ev_active (w); 4853 int active = ev_active (w);
2628 4854
2629 forks [active - 1] = forks [--forkcnt]; 4855 forks [active - 1] = forks [--forkcnt];
2630 ev_active (forks [active - 1]) = active; 4856 ev_active (forks [active - 1]) = active;
2631 } 4857 }
2632 4858
2633 ev_stop (EV_A_ (W)w); 4859 ev_stop (EV_A_ (W)w);
2634}
2635#endif
2636 4860
4861 EV_FREQUENT_CHECK;
4862}
4863#endif
4864
2637#if EV_ASYNC_ENABLE 4865#if EV_CLEANUP_ENABLE
2638void 4866void
2639ev_async_start (EV_P_ ev_async *w) 4867ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
2640{ 4868{
2641 if (expect_false (ev_is_active (w))) 4869 if (expect_false (ev_is_active (w)))
2642 return; 4870 return;
2643 4871
4872 EV_FREQUENT_CHECK;
4873
4874 ev_start (EV_A_ (W)w, ++cleanupcnt);
4875 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4876 cleanups [cleanupcnt - 1] = w;
4877
4878 /* cleanup watchers should never keep a refcount on the loop */
4879 ev_unref (EV_A);
4880 EV_FREQUENT_CHECK;
4881}
4882
4883void
4884ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4885{
4886 clear_pending (EV_A_ (W)w);
4887 if (expect_false (!ev_is_active (w)))
4888 return;
4889
4890 EV_FREQUENT_CHECK;
4891 ev_ref (EV_A);
4892
4893 {
4894 int active = ev_active (w);
4895
4896 cleanups [active - 1] = cleanups [--cleanupcnt];
4897 ev_active (cleanups [active - 1]) = active;
4898 }
4899
4900 ev_stop (EV_A_ (W)w);
4901
4902 EV_FREQUENT_CHECK;
4903}
4904#endif
4905
4906#if EV_ASYNC_ENABLE
4907void
4908ev_async_start (EV_P_ ev_async *w) EV_THROW
4909{
4910 if (expect_false (ev_is_active (w)))
4911 return;
4912
4913 w->sent = 0;
4914
2644 evpipe_init (EV_A); 4915 evpipe_init (EV_A);
4916
4917 EV_FREQUENT_CHECK;
2645 4918
2646 ev_start (EV_A_ (W)w, ++asynccnt); 4919 ev_start (EV_A_ (W)w, ++asynccnt);
2647 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4920 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2648 asyncs [asynccnt - 1] = w; 4921 asyncs [asynccnt - 1] = w;
2649}
2650 4922
4923 EV_FREQUENT_CHECK;
4924}
4925
2651void 4926void
2652ev_async_stop (EV_P_ ev_async *w) 4927ev_async_stop (EV_P_ ev_async *w) EV_THROW
2653{ 4928{
2654 clear_pending (EV_A_ (W)w); 4929 clear_pending (EV_A_ (W)w);
2655 if (expect_false (!ev_is_active (w))) 4930 if (expect_false (!ev_is_active (w)))
2656 return; 4931 return;
2657 4932
4933 EV_FREQUENT_CHECK;
4934
2658 { 4935 {
2659 int active = ev_active (w); 4936 int active = ev_active (w);
2660 4937
2661 asyncs [active - 1] = asyncs [--asynccnt]; 4938 asyncs [active - 1] = asyncs [--asynccnt];
2662 ev_active (asyncs [active - 1]) = active; 4939 ev_active (asyncs [active - 1]) = active;
2663 } 4940 }
2664 4941
2665 ev_stop (EV_A_ (W)w); 4942 ev_stop (EV_A_ (W)w);
2666}
2667 4943
4944 EV_FREQUENT_CHECK;
4945}
4946
2668void 4947void
2669ev_async_send (EV_P_ ev_async *w) 4948ev_async_send (EV_P_ ev_async *w) EV_THROW
2670{ 4949{
2671 w->sent = 1; 4950 w->sent = 1;
2672 evpipe_write (EV_A_ &gotasync); 4951 evpipe_write (EV_A_ &async_pending);
2673} 4952}
2674#endif 4953#endif
2675 4954
2676/*****************************************************************************/ 4955/*****************************************************************************/
2677 4956
… …
2687once_cb (EV_P_ struct ev_once *once, int revents) 4966once_cb (EV_P_ struct ev_once *once, int revents)
2688{ 4967{
2689 void (*cb)(int revents, void *arg) = once->cb; 4968 void (*cb)(int revents, void *arg) = once->cb;
2690 void *arg = once->arg; 4969 void *arg = once->arg;
2691 4970
2692 ev_io_stop (EV_A_ &once->io); 4971 ev_io_stop (EV_A_ &once->io);
2693 ev_timer_stop (EV_A_ &once->to); 4972 ev_timer_stop (EV_A_ &once->to);
2694 ev_free (once); 4973 ev_free (once);
2695 4974
2696 cb (revents, arg); 4975 cb (revents, arg);
2697} 4976}
2698 4977
2699static void 4978static void
2700once_cb_io (EV_P_ ev_io *w, int revents) 4979once_cb_io (EV_P_ ev_io *w, int revents)
2701{ 4980{
2702 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4981 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4982
4983 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2703} 4984}
2704 4985
2705static void 4986static void
2706once_cb_to (EV_P_ ev_timer *w, int revents) 4987once_cb_to (EV_P_ ev_timer *w, int revents)
2707{ 4988{
2708 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4989 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2709}
2710 4990
4991 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4992}
4993
2711void 4994void
2712ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4995ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2713{ 4996{
2714 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4997 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2715 4998
2716 if (expect_false (!once)) 4999 if (expect_false (!once))
2717 { 5000 {
2718 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 5001 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2719 return; 5002 return;
2720 } 5003 }
2721 5004
2722 once->cb = cb; 5005 once->cb = cb;
2723 once->arg = arg; 5006 once->arg = arg;
… …
2735 ev_timer_set (&once->to, timeout, 0.); 5018 ev_timer_set (&once->to, timeout, 0.);
2736 ev_timer_start (EV_A_ &once->to); 5019 ev_timer_start (EV_A_ &once->to);
2737 } 5020 }
2738} 5021}
2739 5022
5023/*****************************************************************************/
5024
5025#if EV_WALK_ENABLE
5026ecb_cold
5027void
5028ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
5029{
5030 int i, j;
5031 ev_watcher_list *wl, *wn;
5032
5033 if (types & (EV_IO | EV_EMBED))
5034 for (i = 0; i < anfdmax; ++i)
5035 for (wl = anfds [i].head; wl; )
5036 {
5037 wn = wl->next;
5038
5039#if EV_EMBED_ENABLE
5040 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5041 {
5042 if (types & EV_EMBED)
5043 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5044 }
5045 else
5046#endif
5047#if EV_USE_INOTIFY
5048 if (ev_cb ((ev_io *)wl) == infy_cb)
5049 ;
5050 else
5051#endif
5052 if ((ev_io *)wl != &pipe_w)
5053 if (types & EV_IO)
5054 cb (EV_A_ EV_IO, wl);
5055
5056 wl = wn;
5057 }
5058
5059 if (types & (EV_TIMER | EV_STAT))
5060 for (i = timercnt + HEAP0; i-- > HEAP0; )
5061#if EV_STAT_ENABLE
5062 /*TODO: timer is not always active*/
5063 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5064 {
5065 if (types & EV_STAT)
5066 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5067 }
5068 else
5069#endif
5070 if (types & EV_TIMER)
5071 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5072
5073#if EV_PERIODIC_ENABLE
5074 if (types & EV_PERIODIC)
5075 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5076 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5077#endif
5078
5079#if EV_IDLE_ENABLE
5080 if (types & EV_IDLE)
5081 for (j = NUMPRI; j--; )
5082 for (i = idlecnt [j]; i--; )
5083 cb (EV_A_ EV_IDLE, idles [j][i]);
5084#endif
5085
5086#if EV_FORK_ENABLE
5087 if (types & EV_FORK)
5088 for (i = forkcnt; i--; )
5089 if (ev_cb (forks [i]) != embed_fork_cb)
5090 cb (EV_A_ EV_FORK, forks [i]);
5091#endif
5092
5093#if EV_ASYNC_ENABLE
5094 if (types & EV_ASYNC)
5095 for (i = asynccnt; i--; )
5096 cb (EV_A_ EV_ASYNC, asyncs [i]);
5097#endif
5098
5099#if EV_PREPARE_ENABLE
5100 if (types & EV_PREPARE)
5101 for (i = preparecnt; i--; )
5102# if EV_EMBED_ENABLE
5103 if (ev_cb (prepares [i]) != embed_prepare_cb)
5104# endif
5105 cb (EV_A_ EV_PREPARE, prepares [i]);
5106#endif
5107
5108#if EV_CHECK_ENABLE
5109 if (types & EV_CHECK)
5110 for (i = checkcnt; i--; )
5111 cb (EV_A_ EV_CHECK, checks [i]);
5112#endif
5113
5114#if EV_SIGNAL_ENABLE
5115 if (types & EV_SIGNAL)
5116 for (i = 0; i < EV_NSIG - 1; ++i)
5117 for (wl = signals [i].head; wl; )
5118 {
5119 wn = wl->next;
5120 cb (EV_A_ EV_SIGNAL, wl);
5121 wl = wn;
5122 }
5123#endif
5124
5125#if EV_CHILD_ENABLE
5126 if (types & EV_CHILD)
5127 for (i = (EV_PID_HASHSIZE); i--; )
5128 for (wl = childs [i]; wl; )
5129 {
5130 wn = wl->next;
5131 cb (EV_A_ EV_CHILD, wl);
5132 wl = wn;
5133 }
5134#endif
5135/* EV_STAT 0x00001000 /* stat data changed */
5136/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5137}
5138#endif
5139
2740#if EV_MULTIPLICITY 5140#if EV_MULTIPLICITY
2741 #include "ev_wrap.h" 5141 #include "ev_wrap.h"
2742#endif 5142#endif
2743 5143
2744#ifdef __cplusplus
2745}
2746#endif
2747

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