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Comparing libev/ev.c (file contents):
Revision 1.246 by root, Wed May 21 12:51:38 2008 UTC vs.
Revision 1.467 by root, Fri May 16 15:15:39 2014 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
168#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
263# define EV_USE_MONOTONIC EV_FEATURE_OS
264# else
169# define EV_USE_MONOTONIC 0 265# define EV_USE_MONOTONIC 0
266# endif
170#endif 267#endif
171 268
172#ifndef EV_USE_REALTIME 269#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 270# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 271#endif
175 272
176#ifndef EV_USE_NANOSLEEP 273#ifndef EV_USE_NANOSLEEP
274# if _POSIX_C_SOURCE >= 199309L
275# define EV_USE_NANOSLEEP EV_FEATURE_OS
276# else
177# define EV_USE_NANOSLEEP 0 277# define EV_USE_NANOSLEEP 0
278# endif
178#endif 279#endif
179 280
180#ifndef EV_USE_SELECT 281#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 282# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 283#endif
183 284
184#ifndef EV_USE_POLL 285#ifndef EV_USE_POLL
185# ifdef _WIN32 286# ifdef _WIN32
186# define EV_USE_POLL 0 287# define EV_USE_POLL 0
187# else 288# else
188# define EV_USE_POLL 1 289# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 290# endif
190#endif 291#endif
191 292
192#ifndef EV_USE_EPOLL 293#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 295# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 296# else
196# define EV_USE_EPOLL 0 297# define EV_USE_EPOLL 0
197# endif 298# endif
198#endif 299#endif
199 300
… …
205# define EV_USE_PORT 0 306# define EV_USE_PORT 0
206#endif 307#endif
207 308
208#ifndef EV_USE_INOTIFY 309#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 311# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 312# else
212# define EV_USE_INOTIFY 0 313# define EV_USE_INOTIFY 0
213# endif 314# endif
214#endif 315#endif
215 316
216#ifndef EV_PID_HASHSIZE 317#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 318# 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 319#endif
223 320
224#ifndef EV_INOTIFY_HASHSIZE 321#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 322# 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 323#endif
231 324
232#ifndef EV_USE_EVENTFD 325#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 326# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 327# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 328# else
236# define EV_USE_EVENTFD 0 329# define EV_USE_EVENTFD 0
237# endif 330# endif
238#endif 331#endif
239 332
333#ifndef EV_USE_SIGNALFD
334# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
335# define EV_USE_SIGNALFD EV_FEATURE_OS
336# else
337# define EV_USE_SIGNALFD 0
338# endif
339#endif
340
341#if 0 /* debugging */
342# define EV_VERIFY 3
343# define EV_USE_4HEAP 1
344# define EV_HEAP_CACHE_AT 1
345#endif
346
347#ifndef EV_VERIFY
348# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
349#endif
350
240#ifndef EV_USE_4HEAP 351#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL 352# define EV_USE_4HEAP EV_FEATURE_DATA
242#endif 353#endif
243 354
244#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL 356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
357#endif
358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
376/* which makes programs even slower. might work on other unices, too. */
377#if EV_USE_CLOCK_SYSCALL
378# include <sys/syscall.h>
379# ifdef SYS_clock_gettime
380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
381# undef EV_USE_MONOTONIC
382# define EV_USE_MONOTONIC 1
383# else
384# undef EV_USE_CLOCK_SYSCALL
385# define EV_USE_CLOCK_SYSCALL 0
386# endif
246#endif 387#endif
247 388
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
249 390
250#ifndef CLOCK_MONOTONIC 391#ifndef CLOCK_MONOTONIC
… …
261# undef EV_USE_INOTIFY 402# undef EV_USE_INOTIFY
262# define EV_USE_INOTIFY 0 403# define EV_USE_INOTIFY 0
263#endif 404#endif
264 405
265#if !EV_USE_NANOSLEEP 406#if !EV_USE_NANOSLEEP
266# ifndef _WIN32 407/* hp-ux has it in sys/time.h, which we unconditionally include above */
408# if !defined _WIN32 && !defined __hpux
267# include <sys/select.h> 409# include <sys/select.h>
268# endif 410# endif
269#endif 411#endif
270 412
271#if EV_USE_INOTIFY 413#if EV_USE_INOTIFY
414# include <sys/statfs.h>
272# include <sys/inotify.h> 415# include <sys/inotify.h>
416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
417# ifndef IN_DONT_FOLLOW
418# undef EV_USE_INOTIFY
419# define EV_USE_INOTIFY 0
273#endif 420# endif
274
275#if EV_SELECT_IS_WINSOCKET
276# include <winsock.h>
277#endif 421#endif
278 422
279#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h> 425# include <stdint.h>
282# ifdef __cplusplus 426# ifndef EFD_NONBLOCK
283extern "C" { 427# define EFD_NONBLOCK O_NONBLOCK
284# endif 428# endif
285int eventfd (unsigned int initval, int flags); 429# ifndef EFD_CLOEXEC
286# ifdef __cplusplus 430# ifdef O_CLOEXEC
287} 431# define EFD_CLOEXEC O_CLOEXEC
432# else
433# define EFD_CLOEXEC 02000000
434# endif
288# endif 435# endif
436EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
437#endif
438
439#if EV_USE_SIGNALFD
440/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
441# include <stdint.h>
442# ifndef SFD_NONBLOCK
443# define SFD_NONBLOCK O_NONBLOCK
444# endif
445# ifndef SFD_CLOEXEC
446# ifdef O_CLOEXEC
447# define SFD_CLOEXEC O_CLOEXEC
448# else
449# define SFD_CLOEXEC 02000000
450# endif
451# endif
452EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
453
454struct signalfd_siginfo
455{
456 uint32_t ssi_signo;
457 char pad[128 - sizeof (uint32_t)];
458};
289#endif 459#endif
290 460
291/**/ 461/**/
292 462
463#if EV_VERIFY >= 3
464# define EV_FREQUENT_CHECK ev_verify (EV_A)
465#else
466# define EV_FREQUENT_CHECK do { } while (0)
467#endif
468
293/* 469/*
294 * This is used to avoid floating point rounding problems. 470 * This is used to work around floating point rounding problems.
295 * It is added to ev_rt_now when scheduling periodics
296 * to ensure progress, time-wise, even when rounding
297 * errors are against us.
298 * This value is good at least till the year 4000. 471 * This value is good at least till the year 4000.
299 * Better solutions welcome.
300 */ 472 */
301#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 473#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
302 475
303#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 476#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
304#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
305/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
306 478
479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
481
482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
490 *
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
493 *
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
496 *
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
500 *
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 *
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
522 */
523
524#ifndef ECB_H
525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
529
530#ifdef _WIN32
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
307#if __GNUC__ >= 4 537 #if __GNUC__
308# define expect(expr,value) __builtin_expect ((expr),(value)) 538 typedef signed long long int64_t;
309# define noinline __attribute__ ((noinline)) 539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
543 #endif
544 #ifdef _WIN64
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
310#else 553#else
311# define expect(expr,value) (expr) 554 #include <inttypes.h>
312# define noinline 555 #if UINTMAX_MAX > 0xffffffffU
313# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 556 #define ECB_PTRSIZE 8
314# define inline 557 #else
558 #define ECB_PTRSIZE 4
559 #endif
315# endif 560#endif
561
562/* work around x32 idiocy by defining proper macros */
563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
316#endif 568 #endif
569#endif
317 570
571/* many compilers define _GNUC_ to some versions but then only implement
572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
577 */
578#ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
581 #else
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
583 #endif
584#endif
585
586#define ECB_CPP (__cplusplus+0)
587#define ECB_CPP11 (__cplusplus >= 201103L)
588
589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
596
597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
609
610/*****************************************************************************/
611
612/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
614
615#if ECB_NO_THREADS
616 #define ECB_NO_SMP 1
617#endif
618
619#if ECB_NO_SMP
620 #define ECB_MEMORY_FENCE do { } while (0)
621#endif
622
623#ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #endif
667 #endif
668#endif
669
670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
701 #elif defined _WIN32
702 #include <WinNT.h>
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
709 #elif __xlC__
710 #define ECB_MEMORY_FENCE __sync ()
711 #endif
712#endif
713
714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
733 /*
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
738 * of your system.
739 */
740 #include <pthread.h>
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
743
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
746 #endif
747#endif
748
749#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
751#endif
752
753#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif
756
757/*****************************************************************************/
758
759#if __cplusplus
760 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
763#elif ECB_C99
764 #define ecb_inline static inline
765#else
766 #define ecb_inline static
767#endif
768
769#if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
771#elif ECB_C99
772 #define ecb_restrict restrict
773#else
774 #define ecb_restrict
775#endif
776
777typedef int ecb_bool;
778
779#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a
782#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
783
784#define ecb_function_ ecb_inline
785
786#if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
801#endif
802
803/* no emulation for ecb_decltype */
804#if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806#elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
808#endif
809
810#define ecb_noinline ecb_attribute ((__noinline__))
811#define ecb_unused ecb_attribute ((__unused__))
812#define ecb_const ecb_attribute ((__const__))
813#define ecb_pure ecb_attribute ((__pure__))
814
815#if ECB_C11
816 #define ecb_noreturn _Noreturn
817#else
818 #define ecb_noreturn ecb_attribute ((__noreturn__))
819#endif
820
821#if ECB_GCC_VERSION(4,3)
822 #define ecb_artificial ecb_attribute ((__artificial__))
823 #define ecb_hot ecb_attribute ((__hot__))
824 #define ecb_cold ecb_attribute ((__cold__))
825#else
826 #define ecb_artificial
827 #define ecb_hot
828 #define ecb_cold
829#endif
830
831/* put around conditional expressions if you are very sure that the */
832/* expression is mostly true or mostly false. note that these return */
833/* booleans, not the expression. */
318#define expect_false(expr) expect ((expr) != 0, 0) 834#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
319#define expect_true(expr) expect ((expr) != 0, 1) 835#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
836/* for compatibility to the rest of the world */
837#define ecb_likely(expr) ecb_expect_true (expr)
838#define ecb_unlikely(expr) ecb_expect_false (expr)
839
840/* count trailing zero bits and count # of one bits */
841#if ECB_GCC_VERSION(3,4)
842 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
843 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
844 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
845 #define ecb_ctz32(x) __builtin_ctz (x)
846 #define ecb_ctz64(x) __builtin_ctzll (x)
847 #define ecb_popcount32(x) __builtin_popcount (x)
848 /* no popcountll */
849#else
850 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
851 ecb_function_ int
852 ecb_ctz32 (uint32_t x)
853 {
854 int r = 0;
855
856 x &= ~x + 1; /* this isolates the lowest bit */
857
858#if ECB_branchless_on_i386
859 r += !!(x & 0xaaaaaaaa) << 0;
860 r += !!(x & 0xcccccccc) << 1;
861 r += !!(x & 0xf0f0f0f0) << 2;
862 r += !!(x & 0xff00ff00) << 3;
863 r += !!(x & 0xffff0000) << 4;
864#else
865 if (x & 0xaaaaaaaa) r += 1;
866 if (x & 0xcccccccc) r += 2;
867 if (x & 0xf0f0f0f0) r += 4;
868 if (x & 0xff00ff00) r += 8;
869 if (x & 0xffff0000) r += 16;
870#endif
871
872 return r;
873 }
874
875 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
876 ecb_function_ int
877 ecb_ctz64 (uint64_t x)
878 {
879 int shift = x & 0xffffffffU ? 0 : 32;
880 return ecb_ctz32 (x >> shift) + shift;
881 }
882
883 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
884 ecb_function_ int
885 ecb_popcount32 (uint32_t x)
886 {
887 x -= (x >> 1) & 0x55555555;
888 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
889 x = ((x >> 4) + x) & 0x0f0f0f0f;
890 x *= 0x01010101;
891
892 return x >> 24;
893 }
894
895 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
896 ecb_function_ int ecb_ld32 (uint32_t x)
897 {
898 int r = 0;
899
900 if (x >> 16) { x >>= 16; r += 16; }
901 if (x >> 8) { x >>= 8; r += 8; }
902 if (x >> 4) { x >>= 4; r += 4; }
903 if (x >> 2) { x >>= 2; r += 2; }
904 if (x >> 1) { r += 1; }
905
906 return r;
907 }
908
909 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
910 ecb_function_ int ecb_ld64 (uint64_t x)
911 {
912 int r = 0;
913
914 if (x >> 32) { x >>= 32; r += 32; }
915
916 return r + ecb_ld32 (x);
917 }
918#endif
919
920ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
921ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
922ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
923ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
924
925ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
926ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
927{
928 return ( (x * 0x0802U & 0x22110U)
929 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
930}
931
932ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
933ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
934{
935 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
936 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
937 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
938 x = ( x >> 8 ) | ( x << 8);
939
940 return x;
941}
942
943ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
944ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
945{
946 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
947 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
948 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
949 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
950 x = ( x >> 16 ) | ( x << 16);
951
952 return x;
953}
954
955/* popcount64 is only available on 64 bit cpus as gcc builtin */
956/* so for this version we are lazy */
957ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
958ecb_function_ int
959ecb_popcount64 (uint64_t x)
960{
961 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
962}
963
964ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
965ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
966ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
967ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
968ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
969ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
970ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
971ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
972
973ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
974ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
975ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
976ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
977ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
978ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
979ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
980ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
981
982#if ECB_GCC_VERSION(4,3)
983 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
984 #define ecb_bswap32(x) __builtin_bswap32 (x)
985 #define ecb_bswap64(x) __builtin_bswap64 (x)
986#else
987 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
988 ecb_function_ uint16_t
989 ecb_bswap16 (uint16_t x)
990 {
991 return ecb_rotl16 (x, 8);
992 }
993
994 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
995 ecb_function_ uint32_t
996 ecb_bswap32 (uint32_t x)
997 {
998 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
999 }
1000
1001 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1002 ecb_function_ uint64_t
1003 ecb_bswap64 (uint64_t x)
1004 {
1005 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1006 }
1007#endif
1008
1009#if ECB_GCC_VERSION(4,5)
1010 #define ecb_unreachable() __builtin_unreachable ()
1011#else
1012 /* this seems to work fine, but gcc always emits a warning for it :/ */
1013 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1014 ecb_inline void ecb_unreachable (void) { }
1015#endif
1016
1017/* try to tell the compiler that some condition is definitely true */
1018#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1019
1020ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1021ecb_inline unsigned char
1022ecb_byteorder_helper (void)
1023{
1024 /* the union code still generates code under pressure in gcc, */
1025 /* but less than using pointers, and always seems to */
1026 /* successfully return a constant. */
1027 /* the reason why we have this horrible preprocessor mess */
1028 /* is to avoid it in all cases, at least on common architectures */
1029 /* or when using a recent enough gcc version (>= 4.6) */
1030#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1031 return 0x44;
1032#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1033 return 0x44;
1034#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1035 return 0x11;
1036#else
1037 union
1038 {
1039 uint32_t i;
1040 uint8_t c;
1041 } u = { 0x11223344 };
1042 return u.c;
1043#endif
1044}
1045
1046ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1047ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1048ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1049ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1050
1051#if ECB_GCC_VERSION(3,0) || ECB_C99
1052 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1053#else
1054 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1055#endif
1056
1057#if __cplusplus
1058 template<typename T>
1059 static inline T ecb_div_rd (T val, T div)
1060 {
1061 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1062 }
1063 template<typename T>
1064 static inline T ecb_div_ru (T val, T div)
1065 {
1066 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1067 }
1068#else
1069 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1070 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1071#endif
1072
1073#if ecb_cplusplus_does_not_suck
1074 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1075 template<typename T, int N>
1076 static inline int ecb_array_length (const T (&arr)[N])
1077 {
1078 return N;
1079 }
1080#else
1081 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1082#endif
1083
1084/*******************************************************************************/
1085/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1086
1087/* basically, everything uses "ieee pure-endian" floating point numbers */
1088/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1089#if 0 \
1090 || __i386 || __i386__ \
1091 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1092 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1093 || defined __s390__ || defined __s390x__ \
1094 || defined __mips__ \
1095 || defined __alpha__ \
1096 || defined __hppa__ \
1097 || defined __ia64__ \
1098 || defined __m68k__ \
1099 || defined __m88k__ \
1100 || defined __sh__ \
1101 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1102 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1103 || defined __aarch64__
1104 #define ECB_STDFP 1
1105 #include <string.h> /* for memcpy */
1106#else
1107 #define ECB_STDFP 0
1108#endif
1109
1110#ifndef ECB_NO_LIBM
1111
1112 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1113
1114 /* only the oldest of old doesn't have this one. solaris. */
1115 #ifdef INFINITY
1116 #define ECB_INFINITY INFINITY
1117 #else
1118 #define ECB_INFINITY HUGE_VAL
1119 #endif
1120
1121 #ifdef NAN
1122 #define ECB_NAN NAN
1123 #else
1124 #define ECB_NAN ECB_INFINITY
1125 #endif
1126
1127 /* converts an ieee half/binary16 to a float */
1128 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1129 ecb_function_ float
1130 ecb_binary16_to_float (uint16_t x)
1131 {
1132 int e = (x >> 10) & 0x1f;
1133 int m = x & 0x3ff;
1134 float r;
1135
1136 if (!e ) r = ldexpf (m , -24);
1137 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1138 else if (m ) r = ECB_NAN;
1139 else r = ECB_INFINITY;
1140
1141 return x & 0x8000 ? -r : r;
1142 }
1143
1144 /* convert a float to ieee single/binary32 */
1145 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1146 ecb_function_ uint32_t
1147 ecb_float_to_binary32 (float x)
1148 {
1149 uint32_t r;
1150
1151 #if ECB_STDFP
1152 memcpy (&r, &x, 4);
1153 #else
1154 /* slow emulation, works for anything but -0 */
1155 uint32_t m;
1156 int e;
1157
1158 if (x == 0e0f ) return 0x00000000U;
1159 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1160 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1161 if (x != x ) return 0x7fbfffffU;
1162
1163 m = frexpf (x, &e) * 0x1000000U;
1164
1165 r = m & 0x80000000U;
1166
1167 if (r)
1168 m = -m;
1169
1170 if (e <= -126)
1171 {
1172 m &= 0xffffffU;
1173 m >>= (-125 - e);
1174 e = -126;
1175 }
1176
1177 r |= (e + 126) << 23;
1178 r |= m & 0x7fffffU;
1179 #endif
1180
1181 return r;
1182 }
1183
1184 /* converts an ieee single/binary32 to a float */
1185 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1186 ecb_function_ float
1187 ecb_binary32_to_float (uint32_t x)
1188 {
1189 float r;
1190
1191 #if ECB_STDFP
1192 memcpy (&r, &x, 4);
1193 #else
1194 /* emulation, only works for normals and subnormals and +0 */
1195 int neg = x >> 31;
1196 int e = (x >> 23) & 0xffU;
1197
1198 x &= 0x7fffffU;
1199
1200 if (e)
1201 x |= 0x800000U;
1202 else
1203 e = 1;
1204
1205 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1206 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1207
1208 r = neg ? -r : r;
1209 #endif
1210
1211 return r;
1212 }
1213
1214 /* convert a double to ieee double/binary64 */
1215 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1216 ecb_function_ uint64_t
1217 ecb_double_to_binary64 (double x)
1218 {
1219 uint64_t r;
1220
1221 #if ECB_STDFP
1222 memcpy (&r, &x, 8);
1223 #else
1224 /* slow emulation, works for anything but -0 */
1225 uint64_t m;
1226 int e;
1227
1228 if (x == 0e0 ) return 0x0000000000000000U;
1229 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1230 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1231 if (x != x ) return 0X7ff7ffffffffffffU;
1232
1233 m = frexp (x, &e) * 0x20000000000000U;
1234
1235 r = m & 0x8000000000000000;;
1236
1237 if (r)
1238 m = -m;
1239
1240 if (e <= -1022)
1241 {
1242 m &= 0x1fffffffffffffU;
1243 m >>= (-1021 - e);
1244 e = -1022;
1245 }
1246
1247 r |= ((uint64_t)(e + 1022)) << 52;
1248 r |= m & 0xfffffffffffffU;
1249 #endif
1250
1251 return r;
1252 }
1253
1254 /* converts an ieee double/binary64 to a double */
1255 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1256 ecb_function_ double
1257 ecb_binary64_to_double (uint64_t x)
1258 {
1259 double r;
1260
1261 #if ECB_STDFP
1262 memcpy (&r, &x, 8);
1263 #else
1264 /* emulation, only works for normals and subnormals and +0 */
1265 int neg = x >> 63;
1266 int e = (x >> 52) & 0x7ffU;
1267
1268 x &= 0xfffffffffffffU;
1269
1270 if (e)
1271 x |= 0x10000000000000U;
1272 else
1273 e = 1;
1274
1275 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1276 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1277
1278 r = neg ? -r : r;
1279 #endif
1280
1281 return r;
1282 }
1283
1284#endif
1285
1286#endif
1287
1288/* ECB.H END */
1289
1290#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1291/* if your architecture doesn't need memory fences, e.g. because it is
1292 * single-cpu/core, or if you use libev in a project that doesn't use libev
1293 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1294 * libev, in which cases the memory fences become nops.
1295 * alternatively, you can remove this #error and link against libpthread,
1296 * which will then provide the memory fences.
1297 */
1298# error "memory fences not defined for your architecture, please report"
1299#endif
1300
1301#ifndef ECB_MEMORY_FENCE
1302# define ECB_MEMORY_FENCE do { } while (0)
1303# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1304# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1305#endif
1306
1307#define expect_false(cond) ecb_expect_false (cond)
1308#define expect_true(cond) ecb_expect_true (cond)
1309#define noinline ecb_noinline
1310
320#define inline_size static inline 1311#define inline_size ecb_inline
321 1312
322#if EV_MINIMAL 1313#if EV_FEATURE_CODE
1314# define inline_speed ecb_inline
1315#else
323# define inline_speed static noinline 1316# define inline_speed static noinline
1317#endif
1318
1319#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1320
1321#if EV_MINPRI == EV_MAXPRI
1322# define ABSPRI(w) (((W)w), 0)
324#else 1323#else
325# define inline_speed static inline
326#endif
327
328#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
329#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1324# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1325#endif
330 1326
331#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1327#define EMPTY /* required for microsofts broken pseudo-c compiler */
332#define EMPTY2(a,b) /* used to suppress some warnings */ 1328#define EMPTY2(a,b) /* used to suppress some warnings */
333 1329
334typedef ev_watcher *W; 1330typedef ev_watcher *W;
… …
336typedef ev_watcher_time *WT; 1332typedef ev_watcher_time *WT;
337 1333
338#define ev_active(w) ((W)(w))->active 1334#define ev_active(w) ((W)(w))->active
339#define ev_at(w) ((WT)(w))->at 1335#define ev_at(w) ((WT)(w))->at
340 1336
1337#if EV_USE_REALTIME
1338/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1339/* giving it a reasonably high chance of working on typical architectures */
1340static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1341#endif
1342
341#if EV_USE_MONOTONIC 1343#if EV_USE_MONOTONIC
342/* sig_atomic_t is used to avoid per-thread variables or locking but still */
343/* giving it a reasonably high chance of working on typical architetcures */
344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1345#endif
1346
1347#ifndef EV_FD_TO_WIN32_HANDLE
1348# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1349#endif
1350#ifndef EV_WIN32_HANDLE_TO_FD
1351# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1352#endif
1353#ifndef EV_WIN32_CLOSE_FD
1354# define EV_WIN32_CLOSE_FD(fd) close (fd)
345#endif 1355#endif
346 1356
347#ifdef _WIN32 1357#ifdef _WIN32
348# include "ev_win32.c" 1358# include "ev_win32.c"
349#endif 1359#endif
350 1360
351/*****************************************************************************/ 1361/*****************************************************************************/
352 1362
1363/* define a suitable floor function (only used by periodics atm) */
1364
1365#if EV_USE_FLOOR
1366# include <math.h>
1367# define ev_floor(v) floor (v)
1368#else
1369
1370#include <float.h>
1371
1372/* a floor() replacement function, should be independent of ev_tstamp type */
1373static ev_tstamp noinline
1374ev_floor (ev_tstamp v)
1375{
1376 /* the choice of shift factor is not terribly important */
1377#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1378 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1379#else
1380 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1381#endif
1382
1383 /* argument too large for an unsigned long? */
1384 if (expect_false (v >= shift))
1385 {
1386 ev_tstamp f;
1387
1388 if (v == v - 1.)
1389 return v; /* very large number */
1390
1391 f = shift * ev_floor (v * (1. / shift));
1392 return f + ev_floor (v - f);
1393 }
1394
1395 /* special treatment for negative args? */
1396 if (expect_false (v < 0.))
1397 {
1398 ev_tstamp f = -ev_floor (-v);
1399
1400 return f - (f == v ? 0 : 1);
1401 }
1402
1403 /* fits into an unsigned long */
1404 return (unsigned long)v;
1405}
1406
1407#endif
1408
1409/*****************************************************************************/
1410
1411#ifdef __linux
1412# include <sys/utsname.h>
1413#endif
1414
1415static unsigned int noinline ecb_cold
1416ev_linux_version (void)
1417{
1418#ifdef __linux
1419 unsigned int v = 0;
1420 struct utsname buf;
1421 int i;
1422 char *p = buf.release;
1423
1424 if (uname (&buf))
1425 return 0;
1426
1427 for (i = 3+1; --i; )
1428 {
1429 unsigned int c = 0;
1430
1431 for (;;)
1432 {
1433 if (*p >= '0' && *p <= '9')
1434 c = c * 10 + *p++ - '0';
1435 else
1436 {
1437 p += *p == '.';
1438 break;
1439 }
1440 }
1441
1442 v = (v << 8) | c;
1443 }
1444
1445 return v;
1446#else
1447 return 0;
1448#endif
1449}
1450
1451/*****************************************************************************/
1452
1453#if EV_AVOID_STDIO
1454static void noinline ecb_cold
1455ev_printerr (const char *msg)
1456{
1457 write (STDERR_FILENO, msg, strlen (msg));
1458}
1459#endif
1460
353static void (*syserr_cb)(const char *msg); 1461static void (*syserr_cb)(const char *msg) EV_THROW;
354 1462
355void 1463void ecb_cold
356ev_set_syserr_cb (void (*cb)(const char *msg)) 1464ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
357{ 1465{
358 syserr_cb = cb; 1466 syserr_cb = cb;
359} 1467}
360 1468
361static void noinline 1469static void noinline ecb_cold
362syserr (const char *msg) 1470ev_syserr (const char *msg)
363{ 1471{
364 if (!msg) 1472 if (!msg)
365 msg = "(libev) system error"; 1473 msg = "(libev) system error";
366 1474
367 if (syserr_cb) 1475 if (syserr_cb)
368 syserr_cb (msg); 1476 syserr_cb (msg);
369 else 1477 else
370 { 1478 {
1479#if EV_AVOID_STDIO
1480 ev_printerr (msg);
1481 ev_printerr (": ");
1482 ev_printerr (strerror (errno));
1483 ev_printerr ("\n");
1484#else
371 perror (msg); 1485 perror (msg);
1486#endif
372 abort (); 1487 abort ();
373 } 1488 }
374} 1489}
375 1490
376static void * 1491static void *
377ev_realloc_emul (void *ptr, long size) 1492ev_realloc_emul (void *ptr, long size) EV_THROW
378{ 1493{
379 /* some systems, notably openbsd and darwin, fail to properly 1494 /* some systems, notably openbsd and darwin, fail to properly
380 * implement realloc (x, 0) (as required by both ansi c-98 and 1495 * implement realloc (x, 0) (as required by both ansi c-89 and
381 * the single unix specification, so work around them here. 1496 * the single unix specification, so work around them here.
1497 * recently, also (at least) fedora and debian started breaking it,
1498 * despite documenting it otherwise.
382 */ 1499 */
383 1500
384 if (size) 1501 if (size)
385 return realloc (ptr, size); 1502 return realloc (ptr, size);
386 1503
387 free (ptr); 1504 free (ptr);
388 return 0; 1505 return 0;
389} 1506}
390 1507
391static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1508static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
392 1509
393void 1510void ecb_cold
394ev_set_allocator (void *(*cb)(void *ptr, long size)) 1511ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
395{ 1512{
396 alloc = cb; 1513 alloc = cb;
397} 1514}
398 1515
399inline_speed void * 1516inline_speed void *
… …
401{ 1518{
402 ptr = alloc (ptr, size); 1519 ptr = alloc (ptr, size);
403 1520
404 if (!ptr && size) 1521 if (!ptr && size)
405 { 1522 {
1523#if EV_AVOID_STDIO
1524 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1525#else
406 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1526 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1527#endif
407 abort (); 1528 abort ();
408 } 1529 }
409 1530
410 return ptr; 1531 return ptr;
411} 1532}
… …
413#define ev_malloc(size) ev_realloc (0, (size)) 1534#define ev_malloc(size) ev_realloc (0, (size))
414#define ev_free(ptr) ev_realloc ((ptr), 0) 1535#define ev_free(ptr) ev_realloc ((ptr), 0)
415 1536
416/*****************************************************************************/ 1537/*****************************************************************************/
417 1538
1539/* set in reify when reification needed */
1540#define EV_ANFD_REIFY 1
1541
1542/* file descriptor info structure */
418typedef struct 1543typedef struct
419{ 1544{
420 WL head; 1545 WL head;
421 unsigned char events; 1546 unsigned char events; /* the events watched for */
1547 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1548 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
422 unsigned char reify; 1549 unsigned char unused;
1550#if EV_USE_EPOLL
1551 unsigned int egen; /* generation counter to counter epoll bugs */
1552#endif
423#if EV_SELECT_IS_WINSOCKET 1553#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
424 SOCKET handle; 1554 SOCKET handle;
425#endif 1555#endif
1556#if EV_USE_IOCP
1557 OVERLAPPED or, ow;
1558#endif
426} ANFD; 1559} ANFD;
427 1560
1561/* stores the pending event set for a given watcher */
428typedef struct 1562typedef struct
429{ 1563{
430 W w; 1564 W w;
431 int events; 1565 int events; /* the pending event set for the given watcher */
432} ANPENDING; 1566} ANPENDING;
433 1567
434#if EV_USE_INOTIFY 1568#if EV_USE_INOTIFY
435/* hash table entry per inotify-id */ 1569/* hash table entry per inotify-id */
436typedef struct 1570typedef struct
… …
439} ANFS; 1573} ANFS;
440#endif 1574#endif
441 1575
442/* Heap Entry */ 1576/* Heap Entry */
443#if EV_HEAP_CACHE_AT 1577#if EV_HEAP_CACHE_AT
1578 /* a heap element */
444 typedef struct { 1579 typedef struct {
445 ev_tstamp at; 1580 ev_tstamp at;
446 WT w; 1581 WT w;
447 } ANHE; 1582 } ANHE;
448 1583
449 #define ANHE_w(he) (he).w /* access watcher, read-write */ 1584 #define ANHE_w(he) (he).w /* access watcher, read-write */
450 #define ANHE_at(he) (he).at /* access cached at, read-only */ 1585 #define ANHE_at(he) (he).at /* access cached at, read-only */
451 #define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */ 1586 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
452#else 1587#else
1588 /* a heap element */
453 typedef WT ANHE; 1589 typedef WT ANHE;
454 1590
455 #define ANHE_w(he) (he) 1591 #define ANHE_w(he) (he)
456 #define ANHE_at(he) (he)->at 1592 #define ANHE_at(he) (he)->at
457 #define ANHE_at_set(he) 1593 #define ANHE_at_cache(he)
458#endif 1594#endif
459 1595
460#if EV_MULTIPLICITY 1596#if EV_MULTIPLICITY
461 1597
462 struct ev_loop 1598 struct ev_loop
… …
468 #undef VAR 1604 #undef VAR
469 }; 1605 };
470 #include "ev_wrap.h" 1606 #include "ev_wrap.h"
471 1607
472 static struct ev_loop default_loop_struct; 1608 static struct ev_loop default_loop_struct;
473 struct ev_loop *ev_default_loop_ptr; 1609 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
474 1610
475#else 1611#else
476 1612
477 ev_tstamp ev_rt_now; 1613 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
478 #define VAR(name,decl) static decl; 1614 #define VAR(name,decl) static decl;
479 #include "ev_vars.h" 1615 #include "ev_vars.h"
480 #undef VAR 1616 #undef VAR
481 1617
482 static int ev_default_loop_ptr; 1618 static int ev_default_loop_ptr;
483 1619
484#endif 1620#endif
485 1621
1622#if EV_FEATURE_API
1623# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1624# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1625# define EV_INVOKE_PENDING invoke_cb (EV_A)
1626#else
1627# define EV_RELEASE_CB (void)0
1628# define EV_ACQUIRE_CB (void)0
1629# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1630#endif
1631
1632#define EVBREAK_RECURSE 0x80
1633
486/*****************************************************************************/ 1634/*****************************************************************************/
487 1635
1636#ifndef EV_HAVE_EV_TIME
488ev_tstamp 1637ev_tstamp
489ev_time (void) 1638ev_time (void) EV_THROW
490{ 1639{
491#if EV_USE_REALTIME 1640#if EV_USE_REALTIME
1641 if (expect_true (have_realtime))
1642 {
492 struct timespec ts; 1643 struct timespec ts;
493 clock_gettime (CLOCK_REALTIME, &ts); 1644 clock_gettime (CLOCK_REALTIME, &ts);
494 return ts.tv_sec + ts.tv_nsec * 1e-9; 1645 return ts.tv_sec + ts.tv_nsec * 1e-9;
495#else 1646 }
1647#endif
1648
496 struct timeval tv; 1649 struct timeval tv;
497 gettimeofday (&tv, 0); 1650 gettimeofday (&tv, 0);
498 return tv.tv_sec + tv.tv_usec * 1e-6; 1651 return tv.tv_sec + tv.tv_usec * 1e-6;
499#endif
500} 1652}
1653#endif
501 1654
502ev_tstamp inline_size 1655inline_size ev_tstamp
503get_clock (void) 1656get_clock (void)
504{ 1657{
505#if EV_USE_MONOTONIC 1658#if EV_USE_MONOTONIC
506 if (expect_true (have_monotonic)) 1659 if (expect_true (have_monotonic))
507 { 1660 {
… …
514 return ev_time (); 1667 return ev_time ();
515} 1668}
516 1669
517#if EV_MULTIPLICITY 1670#if EV_MULTIPLICITY
518ev_tstamp 1671ev_tstamp
519ev_now (EV_P) 1672ev_now (EV_P) EV_THROW
520{ 1673{
521 return ev_rt_now; 1674 return ev_rt_now;
522} 1675}
523#endif 1676#endif
524 1677
525void 1678void
526ev_sleep (ev_tstamp delay) 1679ev_sleep (ev_tstamp delay) EV_THROW
527{ 1680{
528 if (delay > 0.) 1681 if (delay > 0.)
529 { 1682 {
530#if EV_USE_NANOSLEEP 1683#if EV_USE_NANOSLEEP
531 struct timespec ts; 1684 struct timespec ts;
532 1685
533 ts.tv_sec = (time_t)delay; 1686 EV_TS_SET (ts, delay);
534 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
535
536 nanosleep (&ts, 0); 1687 nanosleep (&ts, 0);
537#elif defined(_WIN32) 1688#elif defined _WIN32
538 Sleep ((unsigned long)(delay * 1e3)); 1689 Sleep ((unsigned long)(delay * 1e3));
539#else 1690#else
540 struct timeval tv; 1691 struct timeval tv;
541 1692
542 tv.tv_sec = (time_t)delay; 1693 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
543 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1694 /* something not guaranteed by newer posix versions, but guaranteed */
544 1695 /* by older ones */
1696 EV_TV_SET (tv, delay);
545 select (0, 0, 0, 0, &tv); 1697 select (0, 0, 0, 0, &tv);
546#endif 1698#endif
547 } 1699 }
548} 1700}
549 1701
550/*****************************************************************************/ 1702/*****************************************************************************/
551 1703
552#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1704#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
553 1705
554int inline_size 1706/* find a suitable new size for the given array, */
1707/* hopefully by rounding to a nice-to-malloc size */
1708inline_size int
555array_nextsize (int elem, int cur, int cnt) 1709array_nextsize (int elem, int cur, int cnt)
556{ 1710{
557 int ncur = cur + 1; 1711 int ncur = cur + 1;
558 1712
559 do 1713 do
560 ncur <<= 1; 1714 ncur <<= 1;
561 while (cnt > ncur); 1715 while (cnt > ncur);
562 1716
563 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1717 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
564 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1718 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
565 { 1719 {
566 ncur *= elem; 1720 ncur *= elem;
567 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1721 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
568 ncur = ncur - sizeof (void *) * 4; 1722 ncur = ncur - sizeof (void *) * 4;
… …
570 } 1724 }
571 1725
572 return ncur; 1726 return ncur;
573} 1727}
574 1728
575static noinline void * 1729static void * noinline ecb_cold
576array_realloc (int elem, void *base, int *cur, int cnt) 1730array_realloc (int elem, void *base, int *cur, int cnt)
577{ 1731{
578 *cur = array_nextsize (elem, *cur, cnt); 1732 *cur = array_nextsize (elem, *cur, cnt);
579 return ev_realloc (base, elem * *cur); 1733 return ev_realloc (base, elem * *cur);
580} 1734}
1735
1736#define array_init_zero(base,count) \
1737 memset ((void *)(base), 0, sizeof (*(base)) * (count))
581 1738
582#define array_needsize(type,base,cur,cnt,init) \ 1739#define array_needsize(type,base,cur,cnt,init) \
583 if (expect_false ((cnt) > (cur))) \ 1740 if (expect_false ((cnt) > (cur))) \
584 { \ 1741 { \
585 int ocur_ = (cur); \ 1742 int ecb_unused ocur_ = (cur); \
586 (base) = (type *)array_realloc \ 1743 (base) = (type *)array_realloc \
587 (sizeof (type), (base), &(cur), (cnt)); \ 1744 (sizeof (type), (base), &(cur), (cnt)); \
588 init ((base) + (ocur_), (cur) - ocur_); \ 1745 init ((base) + (ocur_), (cur) - ocur_); \
589 } 1746 }
590 1747
… …
597 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1754 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
598 } 1755 }
599#endif 1756#endif
600 1757
601#define array_free(stem, idx) \ 1758#define array_free(stem, idx) \
602 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1759 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
603 1760
604/*****************************************************************************/ 1761/*****************************************************************************/
605 1762
1763/* dummy callback for pending events */
1764static void noinline
1765pendingcb (EV_P_ ev_prepare *w, int revents)
1766{
1767}
1768
606void noinline 1769void noinline
607ev_feed_event (EV_P_ void *w, int revents) 1770ev_feed_event (EV_P_ void *w, int revents) EV_THROW
608{ 1771{
609 W w_ = (W)w; 1772 W w_ = (W)w;
610 int pri = ABSPRI (w_); 1773 int pri = ABSPRI (w_);
611 1774
612 if (expect_false (w_->pending)) 1775 if (expect_false (w_->pending))
… …
616 w_->pending = ++pendingcnt [pri]; 1779 w_->pending = ++pendingcnt [pri];
617 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1780 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
618 pendings [pri][w_->pending - 1].w = w_; 1781 pendings [pri][w_->pending - 1].w = w_;
619 pendings [pri][w_->pending - 1].events = revents; 1782 pendings [pri][w_->pending - 1].events = revents;
620 } 1783 }
621}
622 1784
623void inline_speed 1785 pendingpri = NUMPRI - 1;
1786}
1787
1788inline_speed void
1789feed_reverse (EV_P_ W w)
1790{
1791 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1792 rfeeds [rfeedcnt++] = w;
1793}
1794
1795inline_size void
1796feed_reverse_done (EV_P_ int revents)
1797{
1798 do
1799 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1800 while (rfeedcnt);
1801}
1802
1803inline_speed void
624queue_events (EV_P_ W *events, int eventcnt, int type) 1804queue_events (EV_P_ W *events, int eventcnt, int type)
625{ 1805{
626 int i; 1806 int i;
627 1807
628 for (i = 0; i < eventcnt; ++i) 1808 for (i = 0; i < eventcnt; ++i)
629 ev_feed_event (EV_A_ events [i], type); 1809 ev_feed_event (EV_A_ events [i], type);
630} 1810}
631 1811
632/*****************************************************************************/ 1812/*****************************************************************************/
633 1813
634void inline_size 1814inline_speed void
635anfds_init (ANFD *base, int count)
636{
637 while (count--)
638 {
639 base->head = 0;
640 base->events = EV_NONE;
641 base->reify = 0;
642
643 ++base;
644 }
645}
646
647void inline_speed
648fd_event (EV_P_ int fd, int revents) 1815fd_event_nocheck (EV_P_ int fd, int revents)
649{ 1816{
650 ANFD *anfd = anfds + fd; 1817 ANFD *anfd = anfds + fd;
651 ev_io *w; 1818 ev_io *w;
652 1819
653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1820 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
657 if (ev) 1824 if (ev)
658 ev_feed_event (EV_A_ (W)w, ev); 1825 ev_feed_event (EV_A_ (W)w, ev);
659 } 1826 }
660} 1827}
661 1828
1829/* do not submit kernel events for fds that have reify set */
1830/* because that means they changed while we were polling for new events */
1831inline_speed void
1832fd_event (EV_P_ int fd, int revents)
1833{
1834 ANFD *anfd = anfds + fd;
1835
1836 if (expect_true (!anfd->reify))
1837 fd_event_nocheck (EV_A_ fd, revents);
1838}
1839
662void 1840void
663ev_feed_fd_event (EV_P_ int fd, int revents) 1841ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
664{ 1842{
665 if (fd >= 0 && fd < anfdmax) 1843 if (fd >= 0 && fd < anfdmax)
666 fd_event (EV_A_ fd, revents); 1844 fd_event_nocheck (EV_A_ fd, revents);
667} 1845}
668 1846
669void inline_size 1847/* make sure the external fd watch events are in-sync */
1848/* with the kernel/libev internal state */
1849inline_size void
670fd_reify (EV_P) 1850fd_reify (EV_P)
671{ 1851{
672 int i; 1852 int i;
1853
1854#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1855 for (i = 0; i < fdchangecnt; ++i)
1856 {
1857 int fd = fdchanges [i];
1858 ANFD *anfd = anfds + fd;
1859
1860 if (anfd->reify & EV__IOFDSET && anfd->head)
1861 {
1862 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1863
1864 if (handle != anfd->handle)
1865 {
1866 unsigned long arg;
1867
1868 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1869
1870 /* handle changed, but fd didn't - we need to do it in two steps */
1871 backend_modify (EV_A_ fd, anfd->events, 0);
1872 anfd->events = 0;
1873 anfd->handle = handle;
1874 }
1875 }
1876 }
1877#endif
673 1878
674 for (i = 0; i < fdchangecnt; ++i) 1879 for (i = 0; i < fdchangecnt; ++i)
675 { 1880 {
676 int fd = fdchanges [i]; 1881 int fd = fdchanges [i];
677 ANFD *anfd = anfds + fd; 1882 ANFD *anfd = anfds + fd;
678 ev_io *w; 1883 ev_io *w;
679 1884
680 unsigned char events = 0; 1885 unsigned char o_events = anfd->events;
1886 unsigned char o_reify = anfd->reify;
681 1887
682 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1888 anfd->reify = 0;
683 events |= (unsigned char)w->events;
684 1889
685#if EV_SELECT_IS_WINSOCKET 1890 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
686 if (events)
687 { 1891 {
688 unsigned long argp; 1892 anfd->events = 0;
689 #ifdef EV_FD_TO_WIN32_HANDLE 1893
690 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1894 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
691 #else 1895 anfd->events |= (unsigned char)w->events;
692 anfd->handle = _get_osfhandle (fd); 1896
693 #endif 1897 if (o_events != anfd->events)
694 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1898 o_reify = EV__IOFDSET; /* actually |= */
695 } 1899 }
696#endif
697 1900
698 { 1901 if (o_reify & EV__IOFDSET)
699 unsigned char o_events = anfd->events;
700 unsigned char o_reify = anfd->reify;
701
702 anfd->reify = 0;
703 anfd->events = events;
704
705 if (o_events != events || o_reify & EV_IOFDSET)
706 backend_modify (EV_A_ fd, o_events, events); 1902 backend_modify (EV_A_ fd, o_events, anfd->events);
707 }
708 } 1903 }
709 1904
710 fdchangecnt = 0; 1905 fdchangecnt = 0;
711} 1906}
712 1907
713void inline_size 1908/* something about the given fd changed */
1909inline_size void
714fd_change (EV_P_ int fd, int flags) 1910fd_change (EV_P_ int fd, int flags)
715{ 1911{
716 unsigned char reify = anfds [fd].reify; 1912 unsigned char reify = anfds [fd].reify;
717 anfds [fd].reify |= flags; 1913 anfds [fd].reify |= flags;
718 1914
… …
722 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1918 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
723 fdchanges [fdchangecnt - 1] = fd; 1919 fdchanges [fdchangecnt - 1] = fd;
724 } 1920 }
725} 1921}
726 1922
727void inline_speed 1923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1924inline_speed void ecb_cold
728fd_kill (EV_P_ int fd) 1925fd_kill (EV_P_ int fd)
729{ 1926{
730 ev_io *w; 1927 ev_io *w;
731 1928
732 while ((w = (ev_io *)anfds [fd].head)) 1929 while ((w = (ev_io *)anfds [fd].head))
… …
734 ev_io_stop (EV_A_ w); 1931 ev_io_stop (EV_A_ w);
735 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
736 } 1933 }
737} 1934}
738 1935
739int inline_size 1936/* check whether the given fd is actually valid, for error recovery */
1937inline_size int ecb_cold
740fd_valid (int fd) 1938fd_valid (int fd)
741{ 1939{
742#ifdef _WIN32 1940#ifdef _WIN32
743 return _get_osfhandle (fd) != -1; 1941 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
744#else 1942#else
745 return fcntl (fd, F_GETFD) != -1; 1943 return fcntl (fd, F_GETFD) != -1;
746#endif 1944#endif
747} 1945}
748 1946
749/* called on EBADF to verify fds */ 1947/* called on EBADF to verify fds */
750static void noinline 1948static void noinline ecb_cold
751fd_ebadf (EV_P) 1949fd_ebadf (EV_P)
752{ 1950{
753 int fd; 1951 int fd;
754 1952
755 for (fd = 0; fd < anfdmax; ++fd) 1953 for (fd = 0; fd < anfdmax; ++fd)
756 if (anfds [fd].events) 1954 if (anfds [fd].events)
757 if (!fd_valid (fd) == -1 && errno == EBADF) 1955 if (!fd_valid (fd) && errno == EBADF)
758 fd_kill (EV_A_ fd); 1956 fd_kill (EV_A_ fd);
759} 1957}
760 1958
761/* called on ENOMEM in select/poll to kill some fds and retry */ 1959/* called on ENOMEM in select/poll to kill some fds and retry */
762static void noinline 1960static void noinline ecb_cold
763fd_enomem (EV_P) 1961fd_enomem (EV_P)
764{ 1962{
765 int fd; 1963 int fd;
766 1964
767 for (fd = anfdmax; fd--; ) 1965 for (fd = anfdmax; fd--; )
768 if (anfds [fd].events) 1966 if (anfds [fd].events)
769 { 1967 {
770 fd_kill (EV_A_ fd); 1968 fd_kill (EV_A_ fd);
771 return; 1969 break;
772 } 1970 }
773} 1971}
774 1972
775/* usually called after fork if backend needs to re-arm all fds from scratch */ 1973/* usually called after fork if backend needs to re-arm all fds from scratch */
776static void noinline 1974static void noinline
… …
780 1978
781 for (fd = 0; fd < anfdmax; ++fd) 1979 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events) 1980 if (anfds [fd].events)
783 { 1981 {
784 anfds [fd].events = 0; 1982 anfds [fd].events = 0;
1983 anfds [fd].emask = 0;
785 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1984 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
786 } 1985 }
787} 1986}
788 1987
1988/* used to prepare libev internal fd's */
1989/* this is not fork-safe */
1990inline_speed void
1991fd_intern (int fd)
1992{
1993#ifdef _WIN32
1994 unsigned long arg = 1;
1995 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1996#else
1997 fcntl (fd, F_SETFD, FD_CLOEXEC);
1998 fcntl (fd, F_SETFL, O_NONBLOCK);
1999#endif
2000}
2001
789/*****************************************************************************/ 2002/*****************************************************************************/
790 2003
791/* 2004/*
792 * the heap functions want a real array index. array index 0 uis guaranteed to not 2005 * the heap functions want a real array index. array index 0 is guaranteed to not
793 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2006 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
794 * the branching factor of the d-tree. 2007 * the branching factor of the d-tree.
795 */ 2008 */
796 2009
797/* 2010/*
… …
802 */ 2015 */
803#if EV_USE_4HEAP 2016#if EV_USE_4HEAP
804 2017
805#define DHEAP 4 2018#define DHEAP 4
806#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 2019#define HEAP0 (DHEAP - 1) /* index of first element in heap */
807 2020#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
808/* towards the root */ 2021#define UPHEAP_DONE(p,k) ((p) == (k))
809void inline_speed
810upheap (ANHE *heap, int k)
811{
812 ANHE he = heap [k];
813
814 for (;;)
815 {
816 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
817
818 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
819 break;
820
821 heap [k] = heap [p];
822 ev_active (ANHE_w (heap [k])) = k;
823 k = p;
824 }
825
826 ev_active (ANHE_w (he)) = k;
827 heap [k] = he;
828}
829 2022
830/* away from the root */ 2023/* away from the root */
831void inline_speed 2024inline_speed void
832downheap (ANHE *heap, int N, int k) 2025downheap (ANHE *heap, int N, int k)
833{ 2026{
834 ANHE he = heap [k]; 2027 ANHE he = heap [k];
835 ANHE *E = heap + N + HEAP0; 2028 ANHE *E = heap + N + HEAP0;
836 2029
837 for (;;) 2030 for (;;)
838 { 2031 {
839 ev_tstamp minat; 2032 ev_tstamp minat;
840 ANHE *minpos; 2033 ANHE *minpos;
841 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0; 2034 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
842 2035
843 // find minimum child 2036 /* find minimum child */
844 if (expect_true (pos + DHEAP - 1 < E)) 2037 if (expect_true (pos + DHEAP - 1 < E))
845 { 2038 {
846 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2039 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
847 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2040 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
848 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2041 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
… …
859 break; 2052 break;
860 2053
861 if (ANHE_at (he) <= minat) 2054 if (ANHE_at (he) <= minat)
862 break; 2055 break;
863 2056
2057 heap [k] = *minpos;
864 ev_active (ANHE_w (*minpos)) = k; 2058 ev_active (ANHE_w (*minpos)) = k;
865 heap [k] = *minpos;
866 2059
867 k = minpos - heap; 2060 k = minpos - heap;
868 } 2061 }
869 2062
2063 heap [k] = he;
870 ev_active (ANHE_w (he)) = k; 2064 ev_active (ANHE_w (he)) = k;
871 heap [k] = he;
872} 2065}
873 2066
874#else // 4HEAP 2067#else /* 4HEAP */
875 2068
876#define HEAP0 1 2069#define HEAP0 1
2070#define HPARENT(k) ((k) >> 1)
2071#define UPHEAP_DONE(p,k) (!(p))
877 2072
878/* towards the root */ 2073/* away from the root */
879void inline_speed 2074inline_speed void
880upheap (ANHE *heap, int k) 2075downheap (ANHE *heap, int N, int k)
881{ 2076{
882 ANHE he = heap [k]; 2077 ANHE he = heap [k];
883 2078
884 for (;;) 2079 for (;;)
885 { 2080 {
886 int p = k >> 1; 2081 int c = k << 1;
887 2082
888 /* maybe we could use a dummy element at heap [0]? */ 2083 if (c >= N + HEAP0)
889 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
890 break; 2084 break;
891 2085
892 heap [k] = heap [p];
893 ev_active (ANHE_w (heap [k])) = k;
894 k = p;
895 }
896
897 heap [k] = he;
898 ev_active (ANHE_w (heap [k])) = k;
899}
900
901/* away from the root */
902void inline_speed
903downheap (ANHE *heap, int N, int k)
904{
905 ANHE he = heap [k];
906
907 for (;;)
908 {
909 int c = k << 1;
910
911 if (c > N)
912 break;
913
914 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2086 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
915 ? 1 : 0; 2087 ? 1 : 0;
916 2088
917 if (ANHE_at (he) <= ANHE_at (heap [c])) 2089 if (ANHE_at (he) <= ANHE_at (heap [c]))
918 break; 2090 break;
919 2091
… …
926 heap [k] = he; 2098 heap [k] = he;
927 ev_active (ANHE_w (he)) = k; 2099 ev_active (ANHE_w (he)) = k;
928} 2100}
929#endif 2101#endif
930 2102
931void inline_size 2103/* towards the root */
2104inline_speed void
2105upheap (ANHE *heap, int k)
2106{
2107 ANHE he = heap [k];
2108
2109 for (;;)
2110 {
2111 int p = HPARENT (k);
2112
2113 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2114 break;
2115
2116 heap [k] = heap [p];
2117 ev_active (ANHE_w (heap [k])) = k;
2118 k = p;
2119 }
2120
2121 heap [k] = he;
2122 ev_active (ANHE_w (he)) = k;
2123}
2124
2125/* move an element suitably so it is in a correct place */
2126inline_size void
932adjustheap (ANHE *heap, int N, int k) 2127adjustheap (ANHE *heap, int N, int k)
933{ 2128{
2129 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
934 upheap (heap, k); 2130 upheap (heap, k);
2131 else
935 downheap (heap, N, k); 2132 downheap (heap, N, k);
2133}
2134
2135/* rebuild the heap: this function is used only once and executed rarely */
2136inline_size void
2137reheap (ANHE *heap, int N)
2138{
2139 int i;
2140
2141 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2142 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2143 for (i = 0; i < N; ++i)
2144 upheap (heap, i + HEAP0);
936} 2145}
937 2146
938/*****************************************************************************/ 2147/*****************************************************************************/
939 2148
2149/* associate signal watchers to a signal signal */
940typedef struct 2150typedef struct
941{ 2151{
2152 EV_ATOMIC_T pending;
2153#if EV_MULTIPLICITY
2154 EV_P;
2155#endif
942 WL head; 2156 WL head;
943 EV_ATOMIC_T gotsig;
944} ANSIG; 2157} ANSIG;
945 2158
946static ANSIG *signals; 2159static ANSIG signals [EV_NSIG - 1];
947static int signalmax;
948
949static EV_ATOMIC_T gotsig;
950
951void inline_size
952signals_init (ANSIG *base, int count)
953{
954 while (count--)
955 {
956 base->head = 0;
957 base->gotsig = 0;
958
959 ++base;
960 }
961}
962 2160
963/*****************************************************************************/ 2161/*****************************************************************************/
964 2162
965void inline_speed 2163#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
966fd_intern (int fd)
967{
968#ifdef _WIN32
969 int arg = 1;
970 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
971#else
972 fcntl (fd, F_SETFD, FD_CLOEXEC);
973 fcntl (fd, F_SETFL, O_NONBLOCK);
974#endif
975}
976 2164
977static void noinline 2165static void noinline ecb_cold
978evpipe_init (EV_P) 2166evpipe_init (EV_P)
979{ 2167{
980 if (!ev_is_active (&pipeev)) 2168 if (!ev_is_active (&pipe_w))
2169 {
2170 int fds [2];
2171
2172# if EV_USE_EVENTFD
2173 fds [0] = -1;
2174 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2175 if (fds [1] < 0 && errno == EINVAL)
2176 fds [1] = eventfd (0, 0);
2177
2178 if (fds [1] < 0)
2179# endif
2180 {
2181 while (pipe (fds))
2182 ev_syserr ("(libev) error creating signal/async pipe");
2183
2184 fd_intern (fds [0]);
2185 }
2186
2187 evpipe [0] = fds [0];
2188
2189 if (evpipe [1] < 0)
2190 evpipe [1] = fds [1]; /* first call, set write fd */
2191 else
2192 {
2193 /* on subsequent calls, do not change evpipe [1] */
2194 /* so that evpipe_write can always rely on its value. */
2195 /* this branch does not do anything sensible on windows, */
2196 /* so must not be executed on windows */
2197
2198 dup2 (fds [1], evpipe [1]);
2199 close (fds [1]);
2200 }
2201
2202 fd_intern (evpipe [1]);
2203
2204 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2205 ev_io_start (EV_A_ &pipe_w);
2206 ev_unref (EV_A); /* watcher should not keep loop alive */
981 { 2207 }
2208}
2209
2210inline_speed void
2211evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2212{
2213 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2214
2215 if (expect_true (*flag))
2216 return;
2217
2218 *flag = 1;
2219 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2220
2221 pipe_write_skipped = 1;
2222
2223 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2224
2225 if (pipe_write_wanted)
2226 {
2227 int old_errno;
2228
2229 pipe_write_skipped = 0;
2230 ECB_MEMORY_FENCE_RELEASE;
2231
2232 old_errno = errno; /* save errno because write will clobber it */
2233
982#if EV_USE_EVENTFD 2234#if EV_USE_EVENTFD
983 if ((evfd = eventfd (0, 0)) >= 0) 2235 if (evpipe [0] < 0)
984 { 2236 {
985 evpipe [0] = -1; 2237 uint64_t counter = 1;
986 fd_intern (evfd); 2238 write (evpipe [1], &counter, sizeof (uint64_t));
987 ev_io_set (&pipeev, evfd, EV_READ);
988 } 2239 }
989 else 2240 else
990#endif 2241#endif
991 { 2242 {
992 while (pipe (evpipe)) 2243#ifdef _WIN32
993 syserr ("(libev) error creating signal/async pipe"); 2244 WSABUF buf;
994 2245 DWORD sent;
995 fd_intern (evpipe [0]); 2246 buf.buf = &buf;
996 fd_intern (evpipe [1]); 2247 buf.len = 1;
997 ev_io_set (&pipeev, evpipe [0], EV_READ); 2248 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2249#else
2250 write (evpipe [1], &(evpipe [1]), 1);
2251#endif
998 } 2252 }
999 2253
1000 ev_io_start (EV_A_ &pipeev); 2254 errno = old_errno;
1001 ev_unref (EV_A); /* watcher should not keep loop alive */
1002 }
1003}
1004
1005void inline_size
1006evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1007{
1008 if (!*flag)
1009 { 2255 }
1010 int old_errno = errno; /* save errno because write might clobber it */ 2256}
1011 2257
1012 *flag = 1; 2258/* called whenever the libev signal pipe */
2259/* got some events (signal, async) */
2260static void
2261pipecb (EV_P_ ev_io *iow, int revents)
2262{
2263 int i;
1013 2264
2265 if (revents & EV_READ)
2266 {
1014#if EV_USE_EVENTFD 2267#if EV_USE_EVENTFD
1015 if (evfd >= 0) 2268 if (evpipe [0] < 0)
1016 { 2269 {
1017 uint64_t counter = 1; 2270 uint64_t counter;
1018 write (evfd, &counter, sizeof (uint64_t)); 2271 read (evpipe [1], &counter, sizeof (uint64_t));
1019 } 2272 }
1020 else 2273 else
1021#endif 2274#endif
1022 write (evpipe [1], &old_errno, 1); 2275 {
1023
1024 errno = old_errno;
1025 }
1026}
1027
1028static void
1029pipecb (EV_P_ ev_io *iow, int revents)
1030{
1031#if EV_USE_EVENTFD
1032 if (evfd >= 0)
1033 {
1034 uint64_t counter;
1035 read (evfd, &counter, sizeof (uint64_t));
1036 }
1037 else
1038#endif
1039 {
1040 char dummy; 2276 char dummy[4];
2277#ifdef _WIN32
2278 WSABUF buf;
2279 DWORD recvd;
2280 DWORD flags = 0;
2281 buf.buf = dummy;
2282 buf.len = sizeof (dummy);
2283 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2284#else
1041 read (evpipe [0], &dummy, 1); 2285 read (evpipe [0], &dummy, sizeof (dummy));
2286#endif
2287 }
2288 }
2289
2290 pipe_write_skipped = 0;
2291
2292 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2293
2294#if EV_SIGNAL_ENABLE
2295 if (sig_pending)
1042 } 2296 {
2297 sig_pending = 0;
1043 2298
1044 if (gotsig && ev_is_default_loop (EV_A)) 2299 ECB_MEMORY_FENCE;
1045 {
1046 int signum;
1047 gotsig = 0;
1048 2300
1049 for (signum = signalmax; signum--; ) 2301 for (i = EV_NSIG - 1; i--; )
1050 if (signals [signum].gotsig) 2302 if (expect_false (signals [i].pending))
1051 ev_feed_signal_event (EV_A_ signum + 1); 2303 ev_feed_signal_event (EV_A_ i + 1);
1052 } 2304 }
2305#endif
1053 2306
1054#if EV_ASYNC_ENABLE 2307#if EV_ASYNC_ENABLE
1055 if (gotasync) 2308 if (async_pending)
1056 { 2309 {
1057 int i; 2310 async_pending = 0;
1058 gotasync = 0; 2311
2312 ECB_MEMORY_FENCE;
1059 2313
1060 for (i = asynccnt; i--; ) 2314 for (i = asynccnt; i--; )
1061 if (asyncs [i]->sent) 2315 if (asyncs [i]->sent)
1062 { 2316 {
1063 asyncs [i]->sent = 0; 2317 asyncs [i]->sent = 0;
2318 ECB_MEMORY_FENCE_RELEASE;
1064 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2319 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1065 } 2320 }
1066 } 2321 }
1067#endif 2322#endif
1068} 2323}
1069 2324
1070/*****************************************************************************/ 2325/*****************************************************************************/
1071 2326
2327void
2328ev_feed_signal (int signum) EV_THROW
2329{
2330#if EV_MULTIPLICITY
2331 EV_P;
2332 ECB_MEMORY_FENCE_ACQUIRE;
2333 EV_A = signals [signum - 1].loop;
2334
2335 if (!EV_A)
2336 return;
2337#endif
2338
2339 signals [signum - 1].pending = 1;
2340 evpipe_write (EV_A_ &sig_pending);
2341}
2342
1072static void 2343static void
1073ev_sighandler (int signum) 2344ev_sighandler (int signum)
1074{ 2345{
2346#ifdef _WIN32
2347 signal (signum, ev_sighandler);
2348#endif
2349
2350 ev_feed_signal (signum);
2351}
2352
2353void noinline
2354ev_feed_signal_event (EV_P_ int signum) EV_THROW
2355{
2356 WL w;
2357
2358 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2359 return;
2360
2361 --signum;
2362
1075#if EV_MULTIPLICITY 2363#if EV_MULTIPLICITY
1076 struct ev_loop *loop = &default_loop_struct; 2364 /* it is permissible to try to feed a signal to the wrong loop */
1077#endif 2365 /* or, likely more useful, feeding a signal nobody is waiting for */
1078 2366
1079#if _WIN32 2367 if (expect_false (signals [signum].loop != EV_A))
1080 signal (signum, ev_sighandler);
1081#endif
1082
1083 signals [signum - 1].gotsig = 1;
1084 evpipe_write (EV_A_ &gotsig);
1085}
1086
1087void noinline
1088ev_feed_signal_event (EV_P_ int signum)
1089{
1090 WL w;
1091
1092#if EV_MULTIPLICITY
1093 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1094#endif
1095
1096 --signum;
1097
1098 if (signum < 0 || signum >= signalmax)
1099 return; 2368 return;
2369#endif
1100 2370
1101 signals [signum].gotsig = 0; 2371 signals [signum].pending = 0;
2372 ECB_MEMORY_FENCE_RELEASE;
1102 2373
1103 for (w = signals [signum].head; w; w = w->next) 2374 for (w = signals [signum].head; w; w = w->next)
1104 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2375 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1105} 2376}
1106 2377
2378#if EV_USE_SIGNALFD
2379static void
2380sigfdcb (EV_P_ ev_io *iow, int revents)
2381{
2382 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2383
2384 for (;;)
2385 {
2386 ssize_t res = read (sigfd, si, sizeof (si));
2387
2388 /* not ISO-C, as res might be -1, but works with SuS */
2389 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2390 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2391
2392 if (res < (ssize_t)sizeof (si))
2393 break;
2394 }
2395}
2396#endif
2397
2398#endif
2399
1107/*****************************************************************************/ 2400/*****************************************************************************/
1108 2401
2402#if EV_CHILD_ENABLE
1109static WL childs [EV_PID_HASHSIZE]; 2403static WL childs [EV_PID_HASHSIZE];
1110
1111#ifndef _WIN32
1112 2404
1113static ev_signal childev; 2405static ev_signal childev;
1114 2406
1115#ifndef WIFCONTINUED 2407#ifndef WIFCONTINUED
1116# define WIFCONTINUED(status) 0 2408# define WIFCONTINUED(status) 0
1117#endif 2409#endif
1118 2410
1119void inline_speed 2411/* handle a single child status event */
2412inline_speed void
1120child_reap (EV_P_ int chain, int pid, int status) 2413child_reap (EV_P_ int chain, int pid, int status)
1121{ 2414{
1122 ev_child *w; 2415 ev_child *w;
1123 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2416 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1124 2417
1125 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2418 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1126 { 2419 {
1127 if ((w->pid == pid || !w->pid) 2420 if ((w->pid == pid || !w->pid)
1128 && (!traced || (w->flags & 1))) 2421 && (!traced || (w->flags & 1)))
1129 { 2422 {
1130 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2423 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1137 2430
1138#ifndef WCONTINUED 2431#ifndef WCONTINUED
1139# define WCONTINUED 0 2432# define WCONTINUED 0
1140#endif 2433#endif
1141 2434
2435/* called on sigchld etc., calls waitpid */
1142static void 2436static void
1143childcb (EV_P_ ev_signal *sw, int revents) 2437childcb (EV_P_ ev_signal *sw, int revents)
1144{ 2438{
1145 int pid, status; 2439 int pid, status;
1146 2440
… …
1154 /* make sure we are called again until all children have been reaped */ 2448 /* make sure we are called again until all children have been reaped */
1155 /* we need to do it this way so that the callback gets called before we continue */ 2449 /* we need to do it this way so that the callback gets called before we continue */
1156 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2450 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1157 2451
1158 child_reap (EV_A_ pid, pid, status); 2452 child_reap (EV_A_ pid, pid, status);
1159 if (EV_PID_HASHSIZE > 1) 2453 if ((EV_PID_HASHSIZE) > 1)
1160 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2454 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1161} 2455}
1162 2456
1163#endif 2457#endif
1164 2458
1165/*****************************************************************************/ 2459/*****************************************************************************/
1166 2460
2461#if EV_USE_IOCP
2462# include "ev_iocp.c"
2463#endif
1167#if EV_USE_PORT 2464#if EV_USE_PORT
1168# include "ev_port.c" 2465# include "ev_port.c"
1169#endif 2466#endif
1170#if EV_USE_KQUEUE 2467#if EV_USE_KQUEUE
1171# include "ev_kqueue.c" 2468# include "ev_kqueue.c"
… …
1178#endif 2475#endif
1179#if EV_USE_SELECT 2476#if EV_USE_SELECT
1180# include "ev_select.c" 2477# include "ev_select.c"
1181#endif 2478#endif
1182 2479
1183int 2480int ecb_cold
1184ev_version_major (void) 2481ev_version_major (void) EV_THROW
1185{ 2482{
1186 return EV_VERSION_MAJOR; 2483 return EV_VERSION_MAJOR;
1187} 2484}
1188 2485
1189int 2486int ecb_cold
1190ev_version_minor (void) 2487ev_version_minor (void) EV_THROW
1191{ 2488{
1192 return EV_VERSION_MINOR; 2489 return EV_VERSION_MINOR;
1193} 2490}
1194 2491
1195/* return true if we are running with elevated privileges and should ignore env variables */ 2492/* return true if we are running with elevated privileges and should ignore env variables */
1196int inline_size 2493int inline_size ecb_cold
1197enable_secure (void) 2494enable_secure (void)
1198{ 2495{
1199#ifdef _WIN32 2496#ifdef _WIN32
1200 return 0; 2497 return 0;
1201#else 2498#else
1202 return getuid () != geteuid () 2499 return getuid () != geteuid ()
1203 || getgid () != getegid (); 2500 || getgid () != getegid ();
1204#endif 2501#endif
1205} 2502}
1206 2503
1207unsigned int 2504unsigned int ecb_cold
1208ev_supported_backends (void) 2505ev_supported_backends (void) EV_THROW
1209{ 2506{
1210 unsigned int flags = 0; 2507 unsigned int flags = 0;
1211 2508
1212 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1213 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2510 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1216 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1217 2514
1218 return flags; 2515 return flags;
1219} 2516}
1220 2517
1221unsigned int 2518unsigned int ecb_cold
1222ev_recommended_backends (void) 2519ev_recommended_backends (void) EV_THROW
1223{ 2520{
1224 unsigned int flags = ev_supported_backends (); 2521 unsigned int flags = ev_supported_backends ();
1225 2522
1226#ifndef __NetBSD__ 2523#ifndef __NetBSD__
1227 /* kqueue is borked on everything but netbsd apparently */ 2524 /* kqueue is borked on everything but netbsd apparently */
1228 /* it usually doesn't work correctly on anything but sockets and pipes */ 2525 /* it usually doesn't work correctly on anything but sockets and pipes */
1229 flags &= ~EVBACKEND_KQUEUE; 2526 flags &= ~EVBACKEND_KQUEUE;
1230#endif 2527#endif
1231#ifdef __APPLE__ 2528#ifdef __APPLE__
1232 // flags &= ~EVBACKEND_KQUEUE; for documentation 2529 /* only select works correctly on that "unix-certified" platform */
1233 flags &= ~EVBACKEND_POLL; 2530 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2531 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2532#endif
2533#ifdef __FreeBSD__
2534 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1234#endif 2535#endif
1235 2536
1236 return flags; 2537 return flags;
1237} 2538}
1238 2539
2540unsigned int ecb_cold
2541ev_embeddable_backends (void) EV_THROW
2542{
2543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2544
2545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2546 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2547 flags &= ~EVBACKEND_EPOLL;
2548
2549 return flags;
2550}
2551
1239unsigned int 2552unsigned int
1240ev_embeddable_backends (void) 2553ev_backend (EV_P) EV_THROW
1241{ 2554{
1242 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2555 return backend;
1243
1244 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1245 /* please fix it and tell me how to detect the fix */
1246 flags &= ~EVBACKEND_EPOLL;
1247
1248 return flags;
1249} 2556}
1250 2557
2558#if EV_FEATURE_API
1251unsigned int 2559unsigned int
1252ev_backend (EV_P) 2560ev_iteration (EV_P) EV_THROW
1253{ 2561{
1254 return backend; 2562 return loop_count;
1255} 2563}
1256 2564
1257unsigned int 2565unsigned int
1258ev_loop_count (EV_P) 2566ev_depth (EV_P) EV_THROW
1259{ 2567{
1260 return loop_count; 2568 return loop_depth;
1261} 2569}
1262 2570
1263void 2571void
1264ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2572ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1265{ 2573{
1266 io_blocktime = interval; 2574 io_blocktime = interval;
1267} 2575}
1268 2576
1269void 2577void
1270ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2578ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1271{ 2579{
1272 timeout_blocktime = interval; 2580 timeout_blocktime = interval;
1273} 2581}
1274 2582
2583void
2584ev_set_userdata (EV_P_ void *data) EV_THROW
2585{
2586 userdata = data;
2587}
2588
2589void *
2590ev_userdata (EV_P) EV_THROW
2591{
2592 return userdata;
2593}
2594
2595void
2596ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2597{
2598 invoke_cb = invoke_pending_cb;
2599}
2600
2601void
2602ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
2603{
2604 release_cb = release;
2605 acquire_cb = acquire;
2606}
2607#endif
2608
2609/* initialise a loop structure, must be zero-initialised */
1275static void noinline 2610static void noinline ecb_cold
1276loop_init (EV_P_ unsigned int flags) 2611loop_init (EV_P_ unsigned int flags) EV_THROW
1277{ 2612{
1278 if (!backend) 2613 if (!backend)
1279 { 2614 {
2615 origflags = flags;
2616
2617#if EV_USE_REALTIME
2618 if (!have_realtime)
2619 {
2620 struct timespec ts;
2621
2622 if (!clock_gettime (CLOCK_REALTIME, &ts))
2623 have_realtime = 1;
2624 }
2625#endif
2626
1280#if EV_USE_MONOTONIC 2627#if EV_USE_MONOTONIC
2628 if (!have_monotonic)
1281 { 2629 {
1282 struct timespec ts; 2630 struct timespec ts;
2631
1283 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2632 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1284 have_monotonic = 1; 2633 have_monotonic = 1;
1285 } 2634 }
1286#endif
1287
1288 ev_rt_now = ev_time ();
1289 mn_now = get_clock ();
1290 now_floor = mn_now;
1291 rtmn_diff = ev_rt_now - mn_now;
1292
1293 io_blocktime = 0.;
1294 timeout_blocktime = 0.;
1295 backend = 0;
1296 backend_fd = -1;
1297 gotasync = 0;
1298#if EV_USE_INOTIFY
1299 fs_fd = -2;
1300#endif 2635#endif
1301 2636
1302 /* pid check not overridable via env */ 2637 /* pid check not overridable via env */
1303#ifndef _WIN32 2638#ifndef _WIN32
1304 if (flags & EVFLAG_FORKCHECK) 2639 if (flags & EVFLAG_FORKCHECK)
… …
1308 if (!(flags & EVFLAG_NOENV) 2643 if (!(flags & EVFLAG_NOENV)
1309 && !enable_secure () 2644 && !enable_secure ()
1310 && getenv ("LIBEV_FLAGS")) 2645 && getenv ("LIBEV_FLAGS"))
1311 flags = atoi (getenv ("LIBEV_FLAGS")); 2646 flags = atoi (getenv ("LIBEV_FLAGS"));
1312 2647
1313 if (!(flags & 0x0000ffffU)) 2648 ev_rt_now = ev_time ();
2649 mn_now = get_clock ();
2650 now_floor = mn_now;
2651 rtmn_diff = ev_rt_now - mn_now;
2652#if EV_FEATURE_API
2653 invoke_cb = ev_invoke_pending;
2654#endif
2655
2656 io_blocktime = 0.;
2657 timeout_blocktime = 0.;
2658 backend = 0;
2659 backend_fd = -1;
2660 sig_pending = 0;
2661#if EV_ASYNC_ENABLE
2662 async_pending = 0;
2663#endif
2664 pipe_write_skipped = 0;
2665 pipe_write_wanted = 0;
2666 evpipe [0] = -1;
2667 evpipe [1] = -1;
2668#if EV_USE_INOTIFY
2669 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2670#endif
2671#if EV_USE_SIGNALFD
2672 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2673#endif
2674
2675 if (!(flags & EVBACKEND_MASK))
1314 flags |= ev_recommended_backends (); 2676 flags |= ev_recommended_backends ();
1315 2677
2678#if EV_USE_IOCP
2679 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2680#endif
1316#if EV_USE_PORT 2681#if EV_USE_PORT
1317 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2682 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1318#endif 2683#endif
1319#if EV_USE_KQUEUE 2684#if EV_USE_KQUEUE
1320 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2685 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1327#endif 2692#endif
1328#if EV_USE_SELECT 2693#if EV_USE_SELECT
1329 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2694 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1330#endif 2695#endif
1331 2696
2697 ev_prepare_init (&pending_w, pendingcb);
2698
2699#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1332 ev_init (&pipeev, pipecb); 2700 ev_init (&pipe_w, pipecb);
1333 ev_set_priority (&pipeev, EV_MAXPRI); 2701 ev_set_priority (&pipe_w, EV_MAXPRI);
2702#endif
1334 } 2703 }
1335} 2704}
1336 2705
1337static void noinline 2706/* free up a loop structure */
2707void ecb_cold
1338loop_destroy (EV_P) 2708ev_loop_destroy (EV_P)
1339{ 2709{
1340 int i; 2710 int i;
1341 2711
2712#if EV_MULTIPLICITY
2713 /* mimic free (0) */
2714 if (!EV_A)
2715 return;
2716#endif
2717
2718#if EV_CLEANUP_ENABLE
2719 /* queue cleanup watchers (and execute them) */
2720 if (expect_false (cleanupcnt))
2721 {
2722 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2723 EV_INVOKE_PENDING;
2724 }
2725#endif
2726
2727#if EV_CHILD_ENABLE
2728 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2729 {
2730 ev_ref (EV_A); /* child watcher */
2731 ev_signal_stop (EV_A_ &childev);
2732 }
2733#endif
2734
1342 if (ev_is_active (&pipeev)) 2735 if (ev_is_active (&pipe_w))
1343 { 2736 {
1344 ev_ref (EV_A); /* signal watcher */ 2737 /*ev_ref (EV_A);*/
1345 ev_io_stop (EV_A_ &pipeev); 2738 /*ev_io_stop (EV_A_ &pipe_w);*/
1346 2739
2740 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2741 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2742 }
2743
1347#if EV_USE_EVENTFD 2744#if EV_USE_SIGNALFD
1348 if (evfd >= 0) 2745 if (ev_is_active (&sigfd_w))
1349 close (evfd); 2746 close (sigfd);
1350#endif 2747#endif
1351
1352 if (evpipe [0] >= 0)
1353 {
1354 close (evpipe [0]);
1355 close (evpipe [1]);
1356 }
1357 }
1358 2748
1359#if EV_USE_INOTIFY 2749#if EV_USE_INOTIFY
1360 if (fs_fd >= 0) 2750 if (fs_fd >= 0)
1361 close (fs_fd); 2751 close (fs_fd);
1362#endif 2752#endif
1363 2753
1364 if (backend_fd >= 0) 2754 if (backend_fd >= 0)
1365 close (backend_fd); 2755 close (backend_fd);
1366 2756
2757#if EV_USE_IOCP
2758 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2759#endif
1367#if EV_USE_PORT 2760#if EV_USE_PORT
1368 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2761 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1369#endif 2762#endif
1370#if EV_USE_KQUEUE 2763#if EV_USE_KQUEUE
1371 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2764 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1386#if EV_IDLE_ENABLE 2779#if EV_IDLE_ENABLE
1387 array_free (idle, [i]); 2780 array_free (idle, [i]);
1388#endif 2781#endif
1389 } 2782 }
1390 2783
1391 ev_free (anfds); anfdmax = 0; 2784 ev_free (anfds); anfds = 0; anfdmax = 0;
1392 2785
1393 /* have to use the microsoft-never-gets-it-right macro */ 2786 /* have to use the microsoft-never-gets-it-right macro */
2787 array_free (rfeed, EMPTY);
1394 array_free (fdchange, EMPTY); 2788 array_free (fdchange, EMPTY);
1395 array_free (timer, EMPTY); 2789 array_free (timer, EMPTY);
1396#if EV_PERIODIC_ENABLE 2790#if EV_PERIODIC_ENABLE
1397 array_free (periodic, EMPTY); 2791 array_free (periodic, EMPTY);
1398#endif 2792#endif
1399#if EV_FORK_ENABLE 2793#if EV_FORK_ENABLE
1400 array_free (fork, EMPTY); 2794 array_free (fork, EMPTY);
1401#endif 2795#endif
2796#if EV_CLEANUP_ENABLE
2797 array_free (cleanup, EMPTY);
2798#endif
1402 array_free (prepare, EMPTY); 2799 array_free (prepare, EMPTY);
1403 array_free (check, EMPTY); 2800 array_free (check, EMPTY);
1404#if EV_ASYNC_ENABLE 2801#if EV_ASYNC_ENABLE
1405 array_free (async, EMPTY); 2802 array_free (async, EMPTY);
1406#endif 2803#endif
1407 2804
1408 backend = 0; 2805 backend = 0;
2806
2807#if EV_MULTIPLICITY
2808 if (ev_is_default_loop (EV_A))
2809#endif
2810 ev_default_loop_ptr = 0;
2811#if EV_MULTIPLICITY
2812 else
2813 ev_free (EV_A);
2814#endif
1409} 2815}
1410 2816
1411#if EV_USE_INOTIFY 2817#if EV_USE_INOTIFY
1412void inline_size infy_fork (EV_P); 2818inline_size void infy_fork (EV_P);
1413#endif 2819#endif
1414 2820
1415void inline_size 2821inline_size void
1416loop_fork (EV_P) 2822loop_fork (EV_P)
1417{ 2823{
1418#if EV_USE_PORT 2824#if EV_USE_PORT
1419 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2825 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1420#endif 2826#endif
… …
1426#endif 2832#endif
1427#if EV_USE_INOTIFY 2833#if EV_USE_INOTIFY
1428 infy_fork (EV_A); 2834 infy_fork (EV_A);
1429#endif 2835#endif
1430 2836
2837#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1431 if (ev_is_active (&pipeev)) 2838 if (ev_is_active (&pipe_w))
2839 {
2840 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2841
2842 ev_ref (EV_A);
2843 ev_io_stop (EV_A_ &pipe_w);
2844
2845 if (evpipe [0] >= 0)
2846 EV_WIN32_CLOSE_FD (evpipe [0]);
2847
2848 evpipe_init (EV_A);
2849 /* iterate over everything, in case we missed something before */
2850 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1432 { 2851 }
1433 /* this "locks" the handlers against writing to the pipe */ 2852#endif
1434 /* while we modify the fd vars */ 2853
1435 gotsig = 1; 2854 postfork = 0;
2855}
2856
2857#if EV_MULTIPLICITY
2858
2859struct ev_loop * ecb_cold
2860ev_loop_new (unsigned int flags) EV_THROW
2861{
2862 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2863
2864 memset (EV_A, 0, sizeof (struct ev_loop));
2865 loop_init (EV_A_ flags);
2866
2867 if (ev_backend (EV_A))
2868 return EV_A;
2869
2870 ev_free (EV_A);
2871 return 0;
2872}
2873
2874#endif /* multiplicity */
2875
2876#if EV_VERIFY
2877static void noinline ecb_cold
2878verify_watcher (EV_P_ W w)
2879{
2880 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2881
2882 if (w->pending)
2883 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2884}
2885
2886static void noinline ecb_cold
2887verify_heap (EV_P_ ANHE *heap, int N)
2888{
2889 int i;
2890
2891 for (i = HEAP0; i < N + HEAP0; ++i)
2892 {
2893 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2894 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2895 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2896
2897 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2898 }
2899}
2900
2901static void noinline ecb_cold
2902array_verify (EV_P_ W *ws, int cnt)
2903{
2904 while (cnt--)
2905 {
2906 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2907 verify_watcher (EV_A_ ws [cnt]);
2908 }
2909}
2910#endif
2911
2912#if EV_FEATURE_API
2913void ecb_cold
2914ev_verify (EV_P) EV_THROW
2915{
2916#if EV_VERIFY
2917 int i;
2918 WL w, w2;
2919
2920 assert (activecnt >= -1);
2921
2922 assert (fdchangemax >= fdchangecnt);
2923 for (i = 0; i < fdchangecnt; ++i)
2924 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2925
2926 assert (anfdmax >= 0);
2927 for (i = 0; i < anfdmax; ++i)
2928 {
2929 int j = 0;
2930
2931 for (w = w2 = anfds [i].head; w; w = w->next)
2932 {
2933 verify_watcher (EV_A_ (W)w);
2934
2935 if (j++ & 1)
2936 {
2937 assert (("libev: io watcher list contains a loop", w != w2));
2938 w2 = w2->next;
2939 }
2940
2941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2943 }
2944 }
2945
2946 assert (timermax >= timercnt);
2947 verify_heap (EV_A_ timers, timercnt);
2948
2949#if EV_PERIODIC_ENABLE
2950 assert (periodicmax >= periodiccnt);
2951 verify_heap (EV_A_ periodics, periodiccnt);
2952#endif
2953
2954 for (i = NUMPRI; i--; )
2955 {
2956 assert (pendingmax [i] >= pendingcnt [i]);
2957#if EV_IDLE_ENABLE
2958 assert (idleall >= 0);
2959 assert (idlemax [i] >= idlecnt [i]);
2960 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2961#endif
2962 }
2963
2964#if EV_FORK_ENABLE
2965 assert (forkmax >= forkcnt);
2966 array_verify (EV_A_ (W *)forks, forkcnt);
2967#endif
2968
2969#if EV_CLEANUP_ENABLE
2970 assert (cleanupmax >= cleanupcnt);
2971 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2972#endif
2973
1436#if EV_ASYNC_ENABLE 2974#if EV_ASYNC_ENABLE
1437 gotasync = 1; 2975 assert (asyncmax >= asynccnt);
2976 array_verify (EV_A_ (W *)asyncs, asynccnt);
2977#endif
2978
2979#if EV_PREPARE_ENABLE
2980 assert (preparemax >= preparecnt);
2981 array_verify (EV_A_ (W *)prepares, preparecnt);
2982#endif
2983
2984#if EV_CHECK_ENABLE
2985 assert (checkmax >= checkcnt);
2986 array_verify (EV_A_ (W *)checks, checkcnt);
2987#endif
2988
2989# if 0
2990#if EV_CHILD_ENABLE
2991 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2992 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2993#endif
1438#endif 2994# endif
1439
1440 ev_ref (EV_A);
1441 ev_io_stop (EV_A_ &pipeev);
1442
1443#if EV_USE_EVENTFD
1444 if (evfd >= 0)
1445 close (evfd);
1446#endif 2995#endif
1447
1448 if (evpipe [0] >= 0)
1449 {
1450 close (evpipe [0]);
1451 close (evpipe [1]);
1452 }
1453
1454 evpipe_init (EV_A);
1455 /* now iterate over everything, in case we missed something */
1456 pipecb (EV_A_ &pipeev, EV_READ);
1457 }
1458
1459 postfork = 0;
1460} 2996}
2997#endif
1461 2998
1462#if EV_MULTIPLICITY 2999#if EV_MULTIPLICITY
1463struct ev_loop * 3000struct ev_loop * ecb_cold
1464ev_loop_new (unsigned int flags)
1465{
1466 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1467
1468 memset (loop, 0, sizeof (struct ev_loop));
1469
1470 loop_init (EV_A_ flags);
1471
1472 if (ev_backend (EV_A))
1473 return loop;
1474
1475 return 0;
1476}
1477
1478void
1479ev_loop_destroy (EV_P)
1480{
1481 loop_destroy (EV_A);
1482 ev_free (loop);
1483}
1484
1485void
1486ev_loop_fork (EV_P)
1487{
1488 postfork = 1; /* must be in line with ev_default_fork */
1489}
1490#endif
1491
1492#if EV_MULTIPLICITY
1493struct ev_loop *
1494ev_default_loop_init (unsigned int flags)
1495#else 3001#else
1496int 3002int
3003#endif
1497ev_default_loop (unsigned int flags) 3004ev_default_loop (unsigned int flags) EV_THROW
1498#endif
1499{ 3005{
1500 if (!ev_default_loop_ptr) 3006 if (!ev_default_loop_ptr)
1501 { 3007 {
1502#if EV_MULTIPLICITY 3008#if EV_MULTIPLICITY
1503 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3009 EV_P = ev_default_loop_ptr = &default_loop_struct;
1504#else 3010#else
1505 ev_default_loop_ptr = 1; 3011 ev_default_loop_ptr = 1;
1506#endif 3012#endif
1507 3013
1508 loop_init (EV_A_ flags); 3014 loop_init (EV_A_ flags);
1509 3015
1510 if (ev_backend (EV_A)) 3016 if (ev_backend (EV_A))
1511 { 3017 {
1512#ifndef _WIN32 3018#if EV_CHILD_ENABLE
1513 ev_signal_init (&childev, childcb, SIGCHLD); 3019 ev_signal_init (&childev, childcb, SIGCHLD);
1514 ev_set_priority (&childev, EV_MAXPRI); 3020 ev_set_priority (&childev, EV_MAXPRI);
1515 ev_signal_start (EV_A_ &childev); 3021 ev_signal_start (EV_A_ &childev);
1516 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3022 ev_unref (EV_A); /* child watcher should not keep loop alive */
1517#endif 3023#endif
… …
1522 3028
1523 return ev_default_loop_ptr; 3029 return ev_default_loop_ptr;
1524} 3030}
1525 3031
1526void 3032void
1527ev_default_destroy (void) 3033ev_loop_fork (EV_P) EV_THROW
1528{ 3034{
1529#if EV_MULTIPLICITY 3035 postfork = 1;
1530 struct ev_loop *loop = ev_default_loop_ptr;
1531#endif
1532
1533#ifndef _WIN32
1534 ev_ref (EV_A); /* child watcher */
1535 ev_signal_stop (EV_A_ &childev);
1536#endif
1537
1538 loop_destroy (EV_A);
1539}
1540
1541void
1542ev_default_fork (void)
1543{
1544#if EV_MULTIPLICITY
1545 struct ev_loop *loop = ev_default_loop_ptr;
1546#endif
1547
1548 if (backend)
1549 postfork = 1; /* must be in line with ev_loop_fork */
1550} 3036}
1551 3037
1552/*****************************************************************************/ 3038/*****************************************************************************/
1553 3039
1554void 3040void
1555ev_invoke (EV_P_ void *w, int revents) 3041ev_invoke (EV_P_ void *w, int revents)
1556{ 3042{
1557 EV_CB_INVOKE ((W)w, revents); 3043 EV_CB_INVOKE ((W)w, revents);
1558} 3044}
1559 3045
1560void inline_speed 3046unsigned int
1561call_pending (EV_P) 3047ev_pending_count (EV_P) EV_THROW
1562{ 3048{
1563 int pri; 3049 int pri;
3050 unsigned int count = 0;
1564 3051
1565 for (pri = NUMPRI; pri--; ) 3052 for (pri = NUMPRI; pri--; )
3053 count += pendingcnt [pri];
3054
3055 return count;
3056}
3057
3058void noinline
3059ev_invoke_pending (EV_P)
3060{
3061 pendingpri = NUMPRI;
3062
3063 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3064 {
3065 --pendingpri;
3066
1566 while (pendingcnt [pri]) 3067 while (pendingcnt [pendingpri])
1567 {
1568 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1569
1570 if (expect_true (p->w))
1571 { 3068 {
1572 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 3069 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1573 3070
1574 p->w->pending = 0; 3071 p->w->pending = 0;
1575 EV_CB_INVOKE (p->w, p->events); 3072 EV_CB_INVOKE (p->w, p->events);
3073 EV_FREQUENT_CHECK;
1576 } 3074 }
1577 } 3075 }
1578} 3076}
1579 3077
1580#if EV_IDLE_ENABLE 3078#if EV_IDLE_ENABLE
1581void inline_size 3079/* make idle watchers pending. this handles the "call-idle */
3080/* only when higher priorities are idle" logic */
3081inline_size void
1582idle_reify (EV_P) 3082idle_reify (EV_P)
1583{ 3083{
1584 if (expect_false (idleall)) 3084 if (expect_false (idleall))
1585 { 3085 {
1586 int pri; 3086 int pri;
… …
1598 } 3098 }
1599 } 3099 }
1600} 3100}
1601#endif 3101#endif
1602 3102
1603void inline_size 3103/* make timers pending */
3104inline_size void
1604timers_reify (EV_P) 3105timers_reify (EV_P)
1605{ 3106{
3107 EV_FREQUENT_CHECK;
3108
1606 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 3109 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1607 { 3110 {
1608 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 3111 do
1609
1610 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1611
1612 /* first reschedule or stop timer */
1613 if (w->repeat)
1614 { 3112 {
3113 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3114
3115 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3116
3117 /* first reschedule or stop timer */
3118 if (w->repeat)
3119 {
1615 ev_at (w) += w->repeat; 3120 ev_at (w) += w->repeat;
1616 if (ev_at (w) < mn_now) 3121 if (ev_at (w) < mn_now)
1617 ev_at (w) = mn_now; 3122 ev_at (w) = mn_now;
1618 3123
1619 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3124 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1620 3125
1621 ANHE_at_set (timers [HEAP0]); 3126 ANHE_at_cache (timers [HEAP0]);
1622 downheap (timers, timercnt, HEAP0); 3127 downheap (timers, timercnt, HEAP0);
3128 }
3129 else
3130 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3131
3132 EV_FREQUENT_CHECK;
3133 feed_reverse (EV_A_ (W)w);
1623 } 3134 }
1624 else 3135 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1625 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1626 3136
1627 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 3137 feed_reverse_done (EV_A_ EV_TIMER);
1628 } 3138 }
1629} 3139}
1630 3140
1631#if EV_PERIODIC_ENABLE 3141#if EV_PERIODIC_ENABLE
1632void inline_size 3142
3143static void noinline
3144periodic_recalc (EV_P_ ev_periodic *w)
3145{
3146 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3147 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3148
3149 /* the above almost always errs on the low side */
3150 while (at <= ev_rt_now)
3151 {
3152 ev_tstamp nat = at + w->interval;
3153
3154 /* when resolution fails us, we use ev_rt_now */
3155 if (expect_false (nat == at))
3156 {
3157 at = ev_rt_now;
3158 break;
3159 }
3160
3161 at = nat;
3162 }
3163
3164 ev_at (w) = at;
3165}
3166
3167/* make periodics pending */
3168inline_size void
1633periodics_reify (EV_P) 3169periodics_reify (EV_P)
1634{ 3170{
3171 EV_FREQUENT_CHECK;
3172
1635 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3173 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1636 { 3174 {
1637 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3175 do
1638
1639 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1640
1641 /* first reschedule or stop timer */
1642 if (w->reschedule_cb)
1643 { 3176 {
3177 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3178
3179 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3180
3181 /* first reschedule or stop timer */
3182 if (w->reschedule_cb)
3183 {
1644 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3184 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1645 3185
1646 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 3186 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1647 3187
1648 ANHE_at_set (periodics [HEAP0]); 3188 ANHE_at_cache (periodics [HEAP0]);
1649 downheap (periodics, periodiccnt, HEAP0); 3189 downheap (periodics, periodiccnt, HEAP0);
3190 }
3191 else if (w->interval)
3192 {
3193 periodic_recalc (EV_A_ w);
3194 ANHE_at_cache (periodics [HEAP0]);
3195 downheap (periodics, periodiccnt, HEAP0);
3196 }
3197 else
3198 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3199
3200 EV_FREQUENT_CHECK;
3201 feed_reverse (EV_A_ (W)w);
1650 } 3202 }
1651 else if (w->interval) 3203 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1652 {
1653 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1654 /* if next trigger time is not sufficiently in the future, put it there */
1655 /* this might happen because of floating point inexactness */
1656 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1657 {
1658 ev_at (w) += w->interval;
1659 3204
1660 /* if interval is unreasonably low we might still have a time in the past */
1661 /* so correct this. this will make the periodic very inexact, but the user */
1662 /* has effectively asked to get triggered more often than possible */
1663 if (ev_at (w) < ev_rt_now)
1664 ev_at (w) = ev_rt_now;
1665 }
1666
1667 ANHE_at_set (periodics [HEAP0]);
1668 downheap (periodics, periodiccnt, HEAP0);
1669 }
1670 else
1671 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1672
1673 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 3205 feed_reverse_done (EV_A_ EV_PERIODIC);
1674 } 3206 }
1675} 3207}
1676 3208
3209/* simply recalculate all periodics */
3210/* TODO: maybe ensure that at least one event happens when jumping forward? */
1677static void noinline 3211static void noinline ecb_cold
1678periodics_reschedule (EV_P) 3212periodics_reschedule (EV_P)
1679{ 3213{
1680 int i; 3214 int i;
1681 3215
1682 /* adjust periodics after time jump */ 3216 /* adjust periodics after time jump */
… …
1685 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3219 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1686 3220
1687 if (w->reschedule_cb) 3221 if (w->reschedule_cb)
1688 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3222 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1689 else if (w->interval) 3223 else if (w->interval)
1690 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3224 periodic_recalc (EV_A_ w);
1691 3225
1692 ANHE_at_set (periodics [i]); 3226 ANHE_at_cache (periodics [i]);
1693 } 3227 }
1694 3228
1695 /* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */ 3229 reheap (periodics, periodiccnt);
1696 /* also, this is easy and corretc for both 2-heaps and 4-heaps */ 3230}
3231#endif
3232
3233/* adjust all timers by a given offset */
3234static void noinline ecb_cold
3235timers_reschedule (EV_P_ ev_tstamp adjust)
3236{
3237 int i;
3238
1697 for (i = 0; i < periodiccnt; ++i) 3239 for (i = 0; i < timercnt; ++i)
1698 upheap (periodics, i + HEAP0); 3240 {
3241 ANHE *he = timers + i + HEAP0;
3242 ANHE_w (*he)->at += adjust;
3243 ANHE_at_cache (*he);
3244 }
1699} 3245}
1700#endif
1701 3246
1702void inline_speed 3247/* fetch new monotonic and realtime times from the kernel */
3248/* also detect if there was a timejump, and act accordingly */
3249inline_speed void
1703time_update (EV_P_ ev_tstamp max_block) 3250time_update (EV_P_ ev_tstamp max_block)
1704{ 3251{
1705 int i;
1706
1707#if EV_USE_MONOTONIC 3252#if EV_USE_MONOTONIC
1708 if (expect_true (have_monotonic)) 3253 if (expect_true (have_monotonic))
1709 { 3254 {
3255 int i;
1710 ev_tstamp odiff = rtmn_diff; 3256 ev_tstamp odiff = rtmn_diff;
1711 3257
1712 mn_now = get_clock (); 3258 mn_now = get_clock ();
1713 3259
1714 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3260 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1730 * doesn't hurt either as we only do this on time-jumps or 3276 * doesn't hurt either as we only do this on time-jumps or
1731 * in the unlikely event of having been preempted here. 3277 * in the unlikely event of having been preempted here.
1732 */ 3278 */
1733 for (i = 4; --i; ) 3279 for (i = 4; --i; )
1734 { 3280 {
3281 ev_tstamp diff;
1735 rtmn_diff = ev_rt_now - mn_now; 3282 rtmn_diff = ev_rt_now - mn_now;
1736 3283
3284 diff = odiff - rtmn_diff;
3285
1737 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3286 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1738 return; /* all is well */ 3287 return; /* all is well */
1739 3288
1740 ev_rt_now = ev_time (); 3289 ev_rt_now = ev_time ();
1741 mn_now = get_clock (); 3290 mn_now = get_clock ();
1742 now_floor = mn_now; 3291 now_floor = mn_now;
1743 } 3292 }
1744 3293
3294 /* no timer adjustment, as the monotonic clock doesn't jump */
3295 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1745# if EV_PERIODIC_ENABLE 3296# if EV_PERIODIC_ENABLE
1746 periodics_reschedule (EV_A); 3297 periodics_reschedule (EV_A);
1747# endif 3298# endif
1748 /* no timer adjustment, as the monotonic clock doesn't jump */
1749 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1750 } 3299 }
1751 else 3300 else
1752#endif 3301#endif
1753 { 3302 {
1754 ev_rt_now = ev_time (); 3303 ev_rt_now = ev_time ();
1755 3304
1756 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3305 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1757 { 3306 {
3307 /* adjust timers. this is easy, as the offset is the same for all of them */
3308 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1758#if EV_PERIODIC_ENABLE 3309#if EV_PERIODIC_ENABLE
1759 periodics_reschedule (EV_A); 3310 periodics_reschedule (EV_A);
1760#endif 3311#endif
1761 /* adjust timers. this is easy, as the offset is the same for all of them */
1762 for (i = 0; i < timercnt; ++i)
1763 {
1764 ANHE *he = timers + i + HEAP0;
1765 ANHE_w (*he)->at += ev_rt_now - mn_now;
1766 ANHE_at_set (*he);
1767 }
1768 } 3312 }
1769 3313
1770 mn_now = ev_rt_now; 3314 mn_now = ev_rt_now;
1771 } 3315 }
1772} 3316}
1773 3317
1774void 3318int
1775ev_ref (EV_P)
1776{
1777 ++activecnt;
1778}
1779
1780void
1781ev_unref (EV_P)
1782{
1783 --activecnt;
1784}
1785
1786static int loop_done;
1787
1788void
1789ev_loop (EV_P_ int flags) 3319ev_run (EV_P_ int flags)
1790{ 3320{
3321#if EV_FEATURE_API
3322 ++loop_depth;
3323#endif
3324
3325 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3326
1791 loop_done = EVUNLOOP_CANCEL; 3327 loop_done = EVBREAK_CANCEL;
1792 3328
1793 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3329 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1794 3330
1795 do 3331 do
1796 { 3332 {
3333#if EV_VERIFY >= 2
3334 ev_verify (EV_A);
3335#endif
3336
1797#ifndef _WIN32 3337#ifndef _WIN32
1798 if (expect_false (curpid)) /* penalise the forking check even more */ 3338 if (expect_false (curpid)) /* penalise the forking check even more */
1799 if (expect_false (getpid () != curpid)) 3339 if (expect_false (getpid () != curpid))
1800 { 3340 {
1801 curpid = getpid (); 3341 curpid = getpid ();
… …
1807 /* we might have forked, so queue fork handlers */ 3347 /* we might have forked, so queue fork handlers */
1808 if (expect_false (postfork)) 3348 if (expect_false (postfork))
1809 if (forkcnt) 3349 if (forkcnt)
1810 { 3350 {
1811 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3351 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1812 call_pending (EV_A); 3352 EV_INVOKE_PENDING;
1813 } 3353 }
1814#endif 3354#endif
1815 3355
3356#if EV_PREPARE_ENABLE
1816 /* queue prepare watchers (and execute them) */ 3357 /* queue prepare watchers (and execute them) */
1817 if (expect_false (preparecnt)) 3358 if (expect_false (preparecnt))
1818 { 3359 {
1819 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3360 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1820 call_pending (EV_A); 3361 EV_INVOKE_PENDING;
1821 } 3362 }
3363#endif
1822 3364
1823 if (expect_false (!activecnt)) 3365 if (expect_false (loop_done))
1824 break; 3366 break;
1825 3367
1826 /* we might have forked, so reify kernel state if necessary */ 3368 /* we might have forked, so reify kernel state if necessary */
1827 if (expect_false (postfork)) 3369 if (expect_false (postfork))
1828 loop_fork (EV_A); 3370 loop_fork (EV_A);
… …
1833 /* calculate blocking time */ 3375 /* calculate blocking time */
1834 { 3376 {
1835 ev_tstamp waittime = 0.; 3377 ev_tstamp waittime = 0.;
1836 ev_tstamp sleeptime = 0.; 3378 ev_tstamp sleeptime = 0.;
1837 3379
3380 /* remember old timestamp for io_blocktime calculation */
3381 ev_tstamp prev_mn_now = mn_now;
3382
3383 /* update time to cancel out callback processing overhead */
3384 time_update (EV_A_ 1e100);
3385
3386 /* from now on, we want a pipe-wake-up */
3387 pipe_write_wanted = 1;
3388
3389 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3390
1838 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1839 { 3392 {
1840 /* update time to cancel out callback processing overhead */
1841 time_update (EV_A_ 1e100);
1842
1843 waittime = MAX_BLOCKTIME; 3393 waittime = MAX_BLOCKTIME;
1844 3394
1845 if (timercnt) 3395 if (timercnt)
1846 { 3396 {
1847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1848 if (waittime > to) waittime = to; 3398 if (waittime > to) waittime = to;
1849 } 3399 }
1850 3400
1851#if EV_PERIODIC_ENABLE 3401#if EV_PERIODIC_ENABLE
1852 if (periodiccnt) 3402 if (periodiccnt)
1853 { 3403 {
1854 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1855 if (waittime > to) waittime = to; 3405 if (waittime > to) waittime = to;
1856 } 3406 }
1857#endif 3407#endif
1858 3408
3409 /* don't let timeouts decrease the waittime below timeout_blocktime */
1859 if (expect_false (waittime < timeout_blocktime)) 3410 if (expect_false (waittime < timeout_blocktime))
1860 waittime = timeout_blocktime; 3411 waittime = timeout_blocktime;
1861 3412
1862 sleeptime = waittime - backend_fudge; 3413 /* at this point, we NEED to wait, so we have to ensure */
3414 /* to pass a minimum nonzero value to the backend */
3415 if (expect_false (waittime < backend_mintime))
3416 waittime = backend_mintime;
1863 3417
3418 /* extra check because io_blocktime is commonly 0 */
1864 if (expect_true (sleeptime > io_blocktime)) 3419 if (expect_false (io_blocktime))
1865 sleeptime = io_blocktime;
1866
1867 if (sleeptime)
1868 { 3420 {
3421 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3422
3423 if (sleeptime > waittime - backend_mintime)
3424 sleeptime = waittime - backend_mintime;
3425
3426 if (expect_true (sleeptime > 0.))
3427 {
1869 ev_sleep (sleeptime); 3428 ev_sleep (sleeptime);
1870 waittime -= sleeptime; 3429 waittime -= sleeptime;
3430 }
1871 } 3431 }
1872 } 3432 }
1873 3433
3434#if EV_FEATURE_API
1874 ++loop_count; 3435 ++loop_count;
3436#endif
3437 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1875 backend_poll (EV_A_ waittime); 3438 backend_poll (EV_A_ waittime);
3439 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3440
3441 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3442
3443 ECB_MEMORY_FENCE_ACQUIRE;
3444 if (pipe_write_skipped)
3445 {
3446 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3447 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3448 }
3449
1876 3450
1877 /* update ev_rt_now, do magic */ 3451 /* update ev_rt_now, do magic */
1878 time_update (EV_A_ waittime + sleeptime); 3452 time_update (EV_A_ waittime + sleeptime);
1879 } 3453 }
1880 3454
… …
1887#if EV_IDLE_ENABLE 3461#if EV_IDLE_ENABLE
1888 /* queue idle watchers unless other events are pending */ 3462 /* queue idle watchers unless other events are pending */
1889 idle_reify (EV_A); 3463 idle_reify (EV_A);
1890#endif 3464#endif
1891 3465
3466#if EV_CHECK_ENABLE
1892 /* queue check watchers, to be executed first */ 3467 /* queue check watchers, to be executed first */
1893 if (expect_false (checkcnt)) 3468 if (expect_false (checkcnt))
1894 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3469 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3470#endif
1895 3471
1896 call_pending (EV_A); 3472 EV_INVOKE_PENDING;
1897 } 3473 }
1898 while (expect_true ( 3474 while (expect_true (
1899 activecnt 3475 activecnt
1900 && !loop_done 3476 && !loop_done
1901 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3477 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1902 )); 3478 ));
1903 3479
1904 if (loop_done == EVUNLOOP_ONE) 3480 if (loop_done == EVBREAK_ONE)
1905 loop_done = EVUNLOOP_CANCEL; 3481 loop_done = EVBREAK_CANCEL;
3482
3483#if EV_FEATURE_API
3484 --loop_depth;
3485#endif
3486
3487 return activecnt;
1906} 3488}
1907 3489
1908void 3490void
1909ev_unloop (EV_P_ int how) 3491ev_break (EV_P_ int how) EV_THROW
1910{ 3492{
1911 loop_done = how; 3493 loop_done = how;
1912} 3494}
1913 3495
3496void
3497ev_ref (EV_P) EV_THROW
3498{
3499 ++activecnt;
3500}
3501
3502void
3503ev_unref (EV_P) EV_THROW
3504{
3505 --activecnt;
3506}
3507
3508void
3509ev_now_update (EV_P) EV_THROW
3510{
3511 time_update (EV_A_ 1e100);
3512}
3513
3514void
3515ev_suspend (EV_P) EV_THROW
3516{
3517 ev_now_update (EV_A);
3518}
3519
3520void
3521ev_resume (EV_P) EV_THROW
3522{
3523 ev_tstamp mn_prev = mn_now;
3524
3525 ev_now_update (EV_A);
3526 timers_reschedule (EV_A_ mn_now - mn_prev);
3527#if EV_PERIODIC_ENABLE
3528 /* TODO: really do this? */
3529 periodics_reschedule (EV_A);
3530#endif
3531}
3532
1914/*****************************************************************************/ 3533/*****************************************************************************/
3534/* singly-linked list management, used when the expected list length is short */
1915 3535
1916void inline_size 3536inline_size void
1917wlist_add (WL *head, WL elem) 3537wlist_add (WL *head, WL elem)
1918{ 3538{
1919 elem->next = *head; 3539 elem->next = *head;
1920 *head = elem; 3540 *head = elem;
1921} 3541}
1922 3542
1923void inline_size 3543inline_size void
1924wlist_del (WL *head, WL elem) 3544wlist_del (WL *head, WL elem)
1925{ 3545{
1926 while (*head) 3546 while (*head)
1927 { 3547 {
1928 if (*head == elem) 3548 if (expect_true (*head == elem))
1929 { 3549 {
1930 *head = elem->next; 3550 *head = elem->next;
1931 return; 3551 break;
1932 } 3552 }
1933 3553
1934 head = &(*head)->next; 3554 head = &(*head)->next;
1935 } 3555 }
1936} 3556}
1937 3557
1938void inline_speed 3558/* internal, faster, version of ev_clear_pending */
3559inline_speed void
1939clear_pending (EV_P_ W w) 3560clear_pending (EV_P_ W w)
1940{ 3561{
1941 if (w->pending) 3562 if (w->pending)
1942 { 3563 {
1943 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3564 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1944 w->pending = 0; 3565 w->pending = 0;
1945 } 3566 }
1946} 3567}
1947 3568
1948int 3569int
1949ev_clear_pending (EV_P_ void *w) 3570ev_clear_pending (EV_P_ void *w) EV_THROW
1950{ 3571{
1951 W w_ = (W)w; 3572 W w_ = (W)w;
1952 int pending = w_->pending; 3573 int pending = w_->pending;
1953 3574
1954 if (expect_true (pending)) 3575 if (expect_true (pending))
1955 { 3576 {
1956 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3577 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3578 p->w = (W)&pending_w;
1957 w_->pending = 0; 3579 w_->pending = 0;
1958 p->w = 0;
1959 return p->events; 3580 return p->events;
1960 } 3581 }
1961 else 3582 else
1962 return 0; 3583 return 0;
1963} 3584}
1964 3585
1965void inline_size 3586inline_size void
1966pri_adjust (EV_P_ W w) 3587pri_adjust (EV_P_ W w)
1967{ 3588{
1968 int pri = w->priority; 3589 int pri = ev_priority (w);
1969 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3590 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1970 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3591 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1971 w->priority = pri; 3592 ev_set_priority (w, pri);
1972} 3593}
1973 3594
1974void inline_speed 3595inline_speed void
1975ev_start (EV_P_ W w, int active) 3596ev_start (EV_P_ W w, int active)
1976{ 3597{
1977 pri_adjust (EV_A_ w); 3598 pri_adjust (EV_A_ w);
1978 w->active = active; 3599 w->active = active;
1979 ev_ref (EV_A); 3600 ev_ref (EV_A);
1980} 3601}
1981 3602
1982void inline_size 3603inline_size void
1983ev_stop (EV_P_ W w) 3604ev_stop (EV_P_ W w)
1984{ 3605{
1985 ev_unref (EV_A); 3606 ev_unref (EV_A);
1986 w->active = 0; 3607 w->active = 0;
1987} 3608}
1988 3609
1989/*****************************************************************************/ 3610/*****************************************************************************/
1990 3611
1991void noinline 3612void noinline
1992ev_io_start (EV_P_ ev_io *w) 3613ev_io_start (EV_P_ ev_io *w) EV_THROW
1993{ 3614{
1994 int fd = w->fd; 3615 int fd = w->fd;
1995 3616
1996 if (expect_false (ev_is_active (w))) 3617 if (expect_false (ev_is_active (w)))
1997 return; 3618 return;
1998 3619
1999 assert (("ev_io_start called with negative fd", fd >= 0)); 3620 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3621 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3622
3623 EV_FREQUENT_CHECK;
2000 3624
2001 ev_start (EV_A_ (W)w, 1); 3625 ev_start (EV_A_ (W)w, 1);
2002 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3626 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2003 wlist_add (&anfds[fd].head, (WL)w); 3627 wlist_add (&anfds[fd].head, (WL)w);
2004 3628
3629 /* common bug, apparently */
3630 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3631
2005 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3632 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2006 w->events &= ~EV_IOFDSET; 3633 w->events &= ~EV__IOFDSET;
3634
3635 EV_FREQUENT_CHECK;
2007} 3636}
2008 3637
2009void noinline 3638void noinline
2010ev_io_stop (EV_P_ ev_io *w) 3639ev_io_stop (EV_P_ ev_io *w) EV_THROW
2011{ 3640{
2012 clear_pending (EV_A_ (W)w); 3641 clear_pending (EV_A_ (W)w);
2013 if (expect_false (!ev_is_active (w))) 3642 if (expect_false (!ev_is_active (w)))
2014 return; 3643 return;
2015 3644
2016 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3645 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3646
3647 EV_FREQUENT_CHECK;
2017 3648
2018 wlist_del (&anfds[w->fd].head, (WL)w); 3649 wlist_del (&anfds[w->fd].head, (WL)w);
2019 ev_stop (EV_A_ (W)w); 3650 ev_stop (EV_A_ (W)w);
2020 3651
2021 fd_change (EV_A_ w->fd, 1); 3652 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3653
3654 EV_FREQUENT_CHECK;
2022} 3655}
2023 3656
2024void noinline 3657void noinline
2025ev_timer_start (EV_P_ ev_timer *w) 3658ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2026{ 3659{
2027 if (expect_false (ev_is_active (w))) 3660 if (expect_false (ev_is_active (w)))
2028 return; 3661 return;
2029 3662
2030 ev_at (w) += mn_now; 3663 ev_at (w) += mn_now;
2031 3664
2032 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3665 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2033 3666
3667 EV_FREQUENT_CHECK;
3668
3669 ++timercnt;
2034 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1); 3670 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2035 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3671 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2036 ANHE_w (timers [ev_active (w)]) = (WT)w; 3672 ANHE_w (timers [ev_active (w)]) = (WT)w;
2037 ANHE_at_set (timers [ev_active (w)]); 3673 ANHE_at_cache (timers [ev_active (w)]);
2038 upheap (timers, ev_active (w)); 3674 upheap (timers, ev_active (w));
2039 3675
3676 EV_FREQUENT_CHECK;
3677
2040 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3678 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2041} 3679}
2042 3680
2043void noinline 3681void noinline
2044ev_timer_stop (EV_P_ ev_timer *w) 3682ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2045{ 3683{
2046 clear_pending (EV_A_ (W)w); 3684 clear_pending (EV_A_ (W)w);
2047 if (expect_false (!ev_is_active (w))) 3685 if (expect_false (!ev_is_active (w)))
2048 return; 3686 return;
2049 3687
3688 EV_FREQUENT_CHECK;
3689
2050 { 3690 {
2051 int active = ev_active (w); 3691 int active = ev_active (w);
2052 3692
2053 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 3693 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2054 3694
3695 --timercnt;
3696
2055 if (expect_true (active < timercnt + HEAP0 - 1)) 3697 if (expect_true (active < timercnt + HEAP0))
2056 { 3698 {
2057 timers [active] = timers [timercnt + HEAP0 - 1]; 3699 timers [active] = timers [timercnt + HEAP0];
2058 adjustheap (timers, timercnt, active); 3700 adjustheap (timers, timercnt, active);
2059 } 3701 }
2060
2061 --timercnt;
2062 } 3702 }
2063 3703
2064 ev_at (w) -= mn_now; 3704 ev_at (w) -= mn_now;
2065 3705
2066 ev_stop (EV_A_ (W)w); 3706 ev_stop (EV_A_ (W)w);
3707
3708 EV_FREQUENT_CHECK;
2067} 3709}
2068 3710
2069void noinline 3711void noinline
2070ev_timer_again (EV_P_ ev_timer *w) 3712ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2071{ 3713{
3714 EV_FREQUENT_CHECK;
3715
3716 clear_pending (EV_A_ (W)w);
3717
2072 if (ev_is_active (w)) 3718 if (ev_is_active (w))
2073 { 3719 {
2074 if (w->repeat) 3720 if (w->repeat)
2075 { 3721 {
2076 ev_at (w) = mn_now + w->repeat; 3722 ev_at (w) = mn_now + w->repeat;
2077 ANHE_at_set (timers [ev_active (w)]); 3723 ANHE_at_cache (timers [ev_active (w)]);
2078 adjustheap (timers, timercnt, ev_active (w)); 3724 adjustheap (timers, timercnt, ev_active (w));
2079 } 3725 }
2080 else 3726 else
2081 ev_timer_stop (EV_A_ w); 3727 ev_timer_stop (EV_A_ w);
2082 } 3728 }
2083 else if (w->repeat) 3729 else if (w->repeat)
2084 { 3730 {
2085 ev_at (w) = w->repeat; 3731 ev_at (w) = w->repeat;
2086 ev_timer_start (EV_A_ w); 3732 ev_timer_start (EV_A_ w);
2087 } 3733 }
3734
3735 EV_FREQUENT_CHECK;
3736}
3737
3738ev_tstamp
3739ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3740{
3741 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2088} 3742}
2089 3743
2090#if EV_PERIODIC_ENABLE 3744#if EV_PERIODIC_ENABLE
2091void noinline 3745void noinline
2092ev_periodic_start (EV_P_ ev_periodic *w) 3746ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2093{ 3747{
2094 if (expect_false (ev_is_active (w))) 3748 if (expect_false (ev_is_active (w)))
2095 return; 3749 return;
2096 3750
2097 if (w->reschedule_cb) 3751 if (w->reschedule_cb)
2098 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2099 else if (w->interval) 3753 else if (w->interval)
2100 { 3754 {
2101 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3755 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2102 /* this formula differs from the one in periodic_reify because we do not always round up */ 3756 periodic_recalc (EV_A_ w);
2103 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2104 } 3757 }
2105 else 3758 else
2106 ev_at (w) = w->offset; 3759 ev_at (w) = w->offset;
2107 3760
3761 EV_FREQUENT_CHECK;
3762
3763 ++periodiccnt;
2108 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1); 3764 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2109 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 3765 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2110 ANHE_w (periodics [ev_active (w)]) = (WT)w; 3766 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2111 ANHE_at_set (periodics [ev_active (w)]); 3767 ANHE_at_cache (periodics [ev_active (w)]);
2112 upheap (periodics, ev_active (w)); 3768 upheap (periodics, ev_active (w));
2113 3769
3770 EV_FREQUENT_CHECK;
3771
2114 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3772 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2115} 3773}
2116 3774
2117void noinline 3775void noinline
2118ev_periodic_stop (EV_P_ ev_periodic *w) 3776ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2119{ 3777{
2120 clear_pending (EV_A_ (W)w); 3778 clear_pending (EV_A_ (W)w);
2121 if (expect_false (!ev_is_active (w))) 3779 if (expect_false (!ev_is_active (w)))
2122 return; 3780 return;
2123 3781
3782 EV_FREQUENT_CHECK;
3783
2124 { 3784 {
2125 int active = ev_active (w); 3785 int active = ev_active (w);
2126 3786
2127 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 3787 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2128 3788
3789 --periodiccnt;
3790
2129 if (expect_true (active < periodiccnt + HEAP0 - 1)) 3791 if (expect_true (active < periodiccnt + HEAP0))
2130 { 3792 {
2131 periodics [active] = periodics [periodiccnt + HEAP0 - 1]; 3793 periodics [active] = periodics [periodiccnt + HEAP0];
2132 adjustheap (periodics, periodiccnt, active); 3794 adjustheap (periodics, periodiccnt, active);
2133 } 3795 }
2134
2135 --periodiccnt;
2136 } 3796 }
2137 3797
2138 ev_stop (EV_A_ (W)w); 3798 ev_stop (EV_A_ (W)w);
3799
3800 EV_FREQUENT_CHECK;
2139} 3801}
2140 3802
2141void noinline 3803void noinline
2142ev_periodic_again (EV_P_ ev_periodic *w) 3804ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2143{ 3805{
2144 /* TODO: use adjustheap and recalculation */ 3806 /* TODO: use adjustheap and recalculation */
2145 ev_periodic_stop (EV_A_ w); 3807 ev_periodic_stop (EV_A_ w);
2146 ev_periodic_start (EV_A_ w); 3808 ev_periodic_start (EV_A_ w);
2147} 3809}
… …
2149 3811
2150#ifndef SA_RESTART 3812#ifndef SA_RESTART
2151# define SA_RESTART 0 3813# define SA_RESTART 0
2152#endif 3814#endif
2153 3815
3816#if EV_SIGNAL_ENABLE
3817
2154void noinline 3818void noinline
2155ev_signal_start (EV_P_ ev_signal *w) 3819ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2156{ 3820{
2157#if EV_MULTIPLICITY
2158 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2159#endif
2160 if (expect_false (ev_is_active (w))) 3821 if (expect_false (ev_is_active (w)))
2161 return; 3822 return;
2162 3823
2163 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3824 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2164 3825
2165 evpipe_init (EV_A); 3826#if EV_MULTIPLICITY
3827 assert (("libev: a signal must not be attached to two different loops",
3828 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2166 3829
3830 signals [w->signum - 1].loop = EV_A;
3831 ECB_MEMORY_FENCE_RELEASE;
3832#endif
3833
3834 EV_FREQUENT_CHECK;
3835
3836#if EV_USE_SIGNALFD
3837 if (sigfd == -2)
2167 { 3838 {
2168#ifndef _WIN32 3839 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2169 sigset_t full, prev; 3840 if (sigfd < 0 && errno == EINVAL)
2170 sigfillset (&full); 3841 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2171 sigprocmask (SIG_SETMASK, &full, &prev);
2172#endif
2173 3842
2174 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3843 if (sigfd >= 0)
3844 {
3845 fd_intern (sigfd); /* doing it twice will not hurt */
2175 3846
2176#ifndef _WIN32 3847 sigemptyset (&sigfd_set);
2177 sigprocmask (SIG_SETMASK, &prev, 0); 3848
2178#endif 3849 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3850 ev_set_priority (&sigfd_w, EV_MAXPRI);
3851 ev_io_start (EV_A_ &sigfd_w);
3852 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3853 }
2179 } 3854 }
3855
3856 if (sigfd >= 0)
3857 {
3858 /* TODO: check .head */
3859 sigaddset (&sigfd_set, w->signum);
3860 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3861
3862 signalfd (sigfd, &sigfd_set, 0);
3863 }
3864#endif
2180 3865
2181 ev_start (EV_A_ (W)w, 1); 3866 ev_start (EV_A_ (W)w, 1);
2182 wlist_add (&signals [w->signum - 1].head, (WL)w); 3867 wlist_add (&signals [w->signum - 1].head, (WL)w);
2183 3868
2184 if (!((WL)w)->next) 3869 if (!((WL)w)->next)
3870# if EV_USE_SIGNALFD
3871 if (sigfd < 0) /*TODO*/
3872# endif
2185 { 3873 {
2186#if _WIN32 3874# ifdef _WIN32
3875 evpipe_init (EV_A);
3876
2187 signal (w->signum, ev_sighandler); 3877 signal (w->signum, ev_sighandler);
2188#else 3878# else
2189 struct sigaction sa; 3879 struct sigaction sa;
3880
3881 evpipe_init (EV_A);
3882
2190 sa.sa_handler = ev_sighandler; 3883 sa.sa_handler = ev_sighandler;
2191 sigfillset (&sa.sa_mask); 3884 sigfillset (&sa.sa_mask);
2192 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3885 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2193 sigaction (w->signum, &sa, 0); 3886 sigaction (w->signum, &sa, 0);
3887
3888 if (origflags & EVFLAG_NOSIGMASK)
3889 {
3890 sigemptyset (&sa.sa_mask);
3891 sigaddset (&sa.sa_mask, w->signum);
3892 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3893 }
2194#endif 3894#endif
2195 } 3895 }
3896
3897 EV_FREQUENT_CHECK;
2196} 3898}
2197 3899
2198void noinline 3900void noinline
2199ev_signal_stop (EV_P_ ev_signal *w) 3901ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2200{ 3902{
2201 clear_pending (EV_A_ (W)w); 3903 clear_pending (EV_A_ (W)w);
2202 if (expect_false (!ev_is_active (w))) 3904 if (expect_false (!ev_is_active (w)))
2203 return; 3905 return;
2204 3906
3907 EV_FREQUENT_CHECK;
3908
2205 wlist_del (&signals [w->signum - 1].head, (WL)w); 3909 wlist_del (&signals [w->signum - 1].head, (WL)w);
2206 ev_stop (EV_A_ (W)w); 3910 ev_stop (EV_A_ (W)w);
2207 3911
2208 if (!signals [w->signum - 1].head) 3912 if (!signals [w->signum - 1].head)
3913 {
3914#if EV_MULTIPLICITY
3915 signals [w->signum - 1].loop = 0; /* unattach from signal */
3916#endif
3917#if EV_USE_SIGNALFD
3918 if (sigfd >= 0)
3919 {
3920 sigset_t ss;
3921
3922 sigemptyset (&ss);
3923 sigaddset (&ss, w->signum);
3924 sigdelset (&sigfd_set, w->signum);
3925
3926 signalfd (sigfd, &sigfd_set, 0);
3927 sigprocmask (SIG_UNBLOCK, &ss, 0);
3928 }
3929 else
3930#endif
2209 signal (w->signum, SIG_DFL); 3931 signal (w->signum, SIG_DFL);
3932 }
3933
3934 EV_FREQUENT_CHECK;
2210} 3935}
3936
3937#endif
3938
3939#if EV_CHILD_ENABLE
2211 3940
2212void 3941void
2213ev_child_start (EV_P_ ev_child *w) 3942ev_child_start (EV_P_ ev_child *w) EV_THROW
2214{ 3943{
2215#if EV_MULTIPLICITY 3944#if EV_MULTIPLICITY
2216 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3945 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2217#endif 3946#endif
2218 if (expect_false (ev_is_active (w))) 3947 if (expect_false (ev_is_active (w)))
2219 return; 3948 return;
2220 3949
3950 EV_FREQUENT_CHECK;
3951
2221 ev_start (EV_A_ (W)w, 1); 3952 ev_start (EV_A_ (W)w, 1);
2222 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3953 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3954
3955 EV_FREQUENT_CHECK;
2223} 3956}
2224 3957
2225void 3958void
2226ev_child_stop (EV_P_ ev_child *w) 3959ev_child_stop (EV_P_ ev_child *w) EV_THROW
2227{ 3960{
2228 clear_pending (EV_A_ (W)w); 3961 clear_pending (EV_A_ (W)w);
2229 if (expect_false (!ev_is_active (w))) 3962 if (expect_false (!ev_is_active (w)))
2230 return; 3963 return;
2231 3964
3965 EV_FREQUENT_CHECK;
3966
2232 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3967 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2233 ev_stop (EV_A_ (W)w); 3968 ev_stop (EV_A_ (W)w);
3969
3970 EV_FREQUENT_CHECK;
2234} 3971}
3972
3973#endif
2235 3974
2236#if EV_STAT_ENABLE 3975#if EV_STAT_ENABLE
2237 3976
2238# ifdef _WIN32 3977# ifdef _WIN32
2239# undef lstat 3978# undef lstat
2240# define lstat(a,b) _stati64 (a,b) 3979# define lstat(a,b) _stati64 (a,b)
2241# endif 3980# endif
2242 3981
2243#define DEF_STAT_INTERVAL 5.0074891 3982#define DEF_STAT_INTERVAL 5.0074891
3983#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2244#define MIN_STAT_INTERVAL 0.1074891 3984#define MIN_STAT_INTERVAL 0.1074891
2245 3985
2246static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3986static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2247 3987
2248#if EV_USE_INOTIFY 3988#if EV_USE_INOTIFY
2249# define EV_INOTIFY_BUFSIZE 8192 3989
3990/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3991# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2250 3992
2251static void noinline 3993static void noinline
2252infy_add (EV_P_ ev_stat *w) 3994infy_add (EV_P_ ev_stat *w)
2253{ 3995{
2254 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); 3996 w->wd = inotify_add_watch (fs_fd, w->path,
3997 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3998 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3999 | IN_DONT_FOLLOW | IN_MASK_ADD);
2255 4000
2256 if (w->wd < 0) 4001 if (w->wd >= 0)
4002 {
4003 struct statfs sfs;
4004
4005 /* now local changes will be tracked by inotify, but remote changes won't */
4006 /* unless the filesystem is known to be local, we therefore still poll */
4007 /* also do poll on <2.6.25, but with normal frequency */
4008
4009 if (!fs_2625)
4010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4011 else if (!statfs (w->path, &sfs)
4012 && (sfs.f_type == 0x1373 /* devfs */
4013 || sfs.f_type == 0x4006 /* fat */
4014 || sfs.f_type == 0x4d44 /* msdos */
4015 || sfs.f_type == 0xEF53 /* ext2/3 */
4016 || sfs.f_type == 0x72b6 /* jffs2 */
4017 || sfs.f_type == 0x858458f6 /* ramfs */
4018 || sfs.f_type == 0x5346544e /* ntfs */
4019 || sfs.f_type == 0x3153464a /* jfs */
4020 || sfs.f_type == 0x9123683e /* btrfs */
4021 || sfs.f_type == 0x52654973 /* reiser3 */
4022 || sfs.f_type == 0x01021994 /* tmpfs */
4023 || sfs.f_type == 0x58465342 /* xfs */))
4024 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4025 else
4026 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2257 { 4027 }
2258 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4028 else
4029 {
4030 /* can't use inotify, continue to stat */
4031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2259 4032
2260 /* monitor some parent directory for speedup hints */ 4033 /* if path is not there, monitor some parent directory for speedup hints */
2261 /* note that exceeding the hardcoded limit is not a correctness issue, */ 4034 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2262 /* but an efficiency issue only */ 4035 /* but an efficiency issue only */
2263 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4036 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2264 { 4037 {
2265 char path [4096]; 4038 char path [4096];
2266 strcpy (path, w->path); 4039 strcpy (path, w->path);
… …
2270 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4043 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2271 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4044 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2272 4045
2273 char *pend = strrchr (path, '/'); 4046 char *pend = strrchr (path, '/');
2274 4047
2275 if (!pend) 4048 if (!pend || pend == path)
2276 break; /* whoops, no '/', complain to your admin */ 4049 break;
2277 4050
2278 *pend = 0; 4051 *pend = 0;
2279 w->wd = inotify_add_watch (fs_fd, path, mask); 4052 w->wd = inotify_add_watch (fs_fd, path, mask);
2280 } 4053 }
2281 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4054 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2282 } 4055 }
2283 } 4056 }
2284 else
2285 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2286 4057
2287 if (w->wd >= 0) 4058 if (w->wd >= 0)
2288 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4059 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4060
4061 /* now re-arm timer, if required */
4062 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4063 ev_timer_again (EV_A_ &w->timer);
4064 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2289} 4065}
2290 4066
2291static void noinline 4067static void noinline
2292infy_del (EV_P_ ev_stat *w) 4068infy_del (EV_P_ ev_stat *w)
2293{ 4069{
… …
2296 4072
2297 if (wd < 0) 4073 if (wd < 0)
2298 return; 4074 return;
2299 4075
2300 w->wd = -2; 4076 w->wd = -2;
2301 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4077 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2302 wlist_del (&fs_hash [slot].head, (WL)w); 4078 wlist_del (&fs_hash [slot].head, (WL)w);
2303 4079
2304 /* remove this watcher, if others are watching it, they will rearm */ 4080 /* remove this watcher, if others are watching it, they will rearm */
2305 inotify_rm_watch (fs_fd, wd); 4081 inotify_rm_watch (fs_fd, wd);
2306} 4082}
2307 4083
2308static void noinline 4084static void noinline
2309infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4085infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2310{ 4086{
2311 if (slot < 0) 4087 if (slot < 0)
2312 /* overflow, need to check for all hahs slots */ 4088 /* overflow, need to check for all hash slots */
2313 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4089 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2314 infy_wd (EV_A_ slot, wd, ev); 4090 infy_wd (EV_A_ slot, wd, ev);
2315 else 4091 else
2316 { 4092 {
2317 WL w_; 4093 WL w_;
2318 4094
2319 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4095 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2320 { 4096 {
2321 ev_stat *w = (ev_stat *)w_; 4097 ev_stat *w = (ev_stat *)w_;
2322 w_ = w_->next; /* lets us remove this watcher and all before it */ 4098 w_ = w_->next; /* lets us remove this watcher and all before it */
2323 4099
2324 if (w->wd == wd || wd == -1) 4100 if (w->wd == wd || wd == -1)
2325 { 4101 {
2326 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4102 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2327 { 4103 {
4104 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2328 w->wd = -1; 4105 w->wd = -1;
2329 infy_add (EV_A_ w); /* re-add, no matter what */ 4106 infy_add (EV_A_ w); /* re-add, no matter what */
2330 } 4107 }
2331 4108
2332 stat_timer_cb (EV_A_ &w->timer, 0); 4109 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2337 4114
2338static void 4115static void
2339infy_cb (EV_P_ ev_io *w, int revents) 4116infy_cb (EV_P_ ev_io *w, int revents)
2340{ 4117{
2341 char buf [EV_INOTIFY_BUFSIZE]; 4118 char buf [EV_INOTIFY_BUFSIZE];
2342 struct inotify_event *ev = (struct inotify_event *)buf;
2343 int ofs; 4119 int ofs;
2344 int len = read (fs_fd, buf, sizeof (buf)); 4120 int len = read (fs_fd, buf, sizeof (buf));
2345 4121
2346 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4122 for (ofs = 0; ofs < len; )
4123 {
4124 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2347 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4125 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4126 ofs += sizeof (struct inotify_event) + ev->len;
4127 }
2348} 4128}
2349 4129
2350void inline_size 4130inline_size void ecb_cold
4131ev_check_2625 (EV_P)
4132{
4133 /* kernels < 2.6.25 are borked
4134 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4135 */
4136 if (ev_linux_version () < 0x020619)
4137 return;
4138
4139 fs_2625 = 1;
4140}
4141
4142inline_size int
4143infy_newfd (void)
4144{
4145#if defined IN_CLOEXEC && defined IN_NONBLOCK
4146 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4147 if (fd >= 0)
4148 return fd;
4149#endif
4150 return inotify_init ();
4151}
4152
4153inline_size void
2351infy_init (EV_P) 4154infy_init (EV_P)
2352{ 4155{
2353 if (fs_fd != -2) 4156 if (fs_fd != -2)
2354 return; 4157 return;
2355 4158
4159 fs_fd = -1;
4160
4161 ev_check_2625 (EV_A);
4162
2356 fs_fd = inotify_init (); 4163 fs_fd = infy_newfd ();
2357 4164
2358 if (fs_fd >= 0) 4165 if (fs_fd >= 0)
2359 { 4166 {
4167 fd_intern (fs_fd);
2360 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4168 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2361 ev_set_priority (&fs_w, EV_MAXPRI); 4169 ev_set_priority (&fs_w, EV_MAXPRI);
2362 ev_io_start (EV_A_ &fs_w); 4170 ev_io_start (EV_A_ &fs_w);
4171 ev_unref (EV_A);
2363 } 4172 }
2364} 4173}
2365 4174
2366void inline_size 4175inline_size void
2367infy_fork (EV_P) 4176infy_fork (EV_P)
2368{ 4177{
2369 int slot; 4178 int slot;
2370 4179
2371 if (fs_fd < 0) 4180 if (fs_fd < 0)
2372 return; 4181 return;
2373 4182
4183 ev_ref (EV_A);
4184 ev_io_stop (EV_A_ &fs_w);
2374 close (fs_fd); 4185 close (fs_fd);
2375 fs_fd = inotify_init (); 4186 fs_fd = infy_newfd ();
2376 4187
4188 if (fs_fd >= 0)
4189 {
4190 fd_intern (fs_fd);
4191 ev_io_set (&fs_w, fs_fd, EV_READ);
4192 ev_io_start (EV_A_ &fs_w);
4193 ev_unref (EV_A);
4194 }
4195
2377 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4196 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2378 { 4197 {
2379 WL w_ = fs_hash [slot].head; 4198 WL w_ = fs_hash [slot].head;
2380 fs_hash [slot].head = 0; 4199 fs_hash [slot].head = 0;
2381 4200
2382 while (w_) 4201 while (w_)
… …
2387 w->wd = -1; 4206 w->wd = -1;
2388 4207
2389 if (fs_fd >= 0) 4208 if (fs_fd >= 0)
2390 infy_add (EV_A_ w); /* re-add, no matter what */ 4209 infy_add (EV_A_ w); /* re-add, no matter what */
2391 else 4210 else
4211 {
4212 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4213 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2392 ev_timer_start (EV_A_ &w->timer); 4214 ev_timer_again (EV_A_ &w->timer);
4215 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4216 }
2393 } 4217 }
2394
2395 } 4218 }
2396} 4219}
2397 4220
4221#endif
4222
4223#ifdef _WIN32
4224# define EV_LSTAT(p,b) _stati64 (p, b)
4225#else
4226# define EV_LSTAT(p,b) lstat (p, b)
2398#endif 4227#endif
2399 4228
2400void 4229void
2401ev_stat_stat (EV_P_ ev_stat *w) 4230ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2402{ 4231{
2403 if (lstat (w->path, &w->attr) < 0) 4232 if (lstat (w->path, &w->attr) < 0)
2404 w->attr.st_nlink = 0; 4233 w->attr.st_nlink = 0;
2405 else if (!w->attr.st_nlink) 4234 else if (!w->attr.st_nlink)
2406 w->attr.st_nlink = 1; 4235 w->attr.st_nlink = 1;
… …
2409static void noinline 4238static void noinline
2410stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4239stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2411{ 4240{
2412 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4241 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2413 4242
2414 /* we copy this here each the time so that */ 4243 ev_statdata prev = w->attr;
2415 /* prev has the old value when the callback gets invoked */
2416 w->prev = w->attr;
2417 ev_stat_stat (EV_A_ w); 4244 ev_stat_stat (EV_A_ w);
2418 4245
2419 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4246 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2420 if ( 4247 if (
2421 w->prev.st_dev != w->attr.st_dev 4248 prev.st_dev != w->attr.st_dev
2422 || w->prev.st_ino != w->attr.st_ino 4249 || prev.st_ino != w->attr.st_ino
2423 || w->prev.st_mode != w->attr.st_mode 4250 || prev.st_mode != w->attr.st_mode
2424 || w->prev.st_nlink != w->attr.st_nlink 4251 || prev.st_nlink != w->attr.st_nlink
2425 || w->prev.st_uid != w->attr.st_uid 4252 || prev.st_uid != w->attr.st_uid
2426 || w->prev.st_gid != w->attr.st_gid 4253 || prev.st_gid != w->attr.st_gid
2427 || w->prev.st_rdev != w->attr.st_rdev 4254 || prev.st_rdev != w->attr.st_rdev
2428 || w->prev.st_size != w->attr.st_size 4255 || prev.st_size != w->attr.st_size
2429 || w->prev.st_atime != w->attr.st_atime 4256 || prev.st_atime != w->attr.st_atime
2430 || w->prev.st_mtime != w->attr.st_mtime 4257 || prev.st_mtime != w->attr.st_mtime
2431 || w->prev.st_ctime != w->attr.st_ctime 4258 || prev.st_ctime != w->attr.st_ctime
2432 ) { 4259 ) {
4260 /* we only update w->prev on actual differences */
4261 /* in case we test more often than invoke the callback, */
4262 /* to ensure that prev is always different to attr */
4263 w->prev = prev;
4264
2433 #if EV_USE_INOTIFY 4265 #if EV_USE_INOTIFY
4266 if (fs_fd >= 0)
4267 {
2434 infy_del (EV_A_ w); 4268 infy_del (EV_A_ w);
2435 infy_add (EV_A_ w); 4269 infy_add (EV_A_ w);
2436 ev_stat_stat (EV_A_ w); /* avoid race... */ 4270 ev_stat_stat (EV_A_ w); /* avoid race... */
4271 }
2437 #endif 4272 #endif
2438 4273
2439 ev_feed_event (EV_A_ w, EV_STAT); 4274 ev_feed_event (EV_A_ w, EV_STAT);
2440 } 4275 }
2441} 4276}
2442 4277
2443void 4278void
2444ev_stat_start (EV_P_ ev_stat *w) 4279ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2445{ 4280{
2446 if (expect_false (ev_is_active (w))) 4281 if (expect_false (ev_is_active (w)))
2447 return; 4282 return;
2448 4283
2449 /* since we use memcmp, we need to clear any padding data etc. */
2450 memset (&w->prev, 0, sizeof (ev_statdata));
2451 memset (&w->attr, 0, sizeof (ev_statdata));
2452
2453 ev_stat_stat (EV_A_ w); 4284 ev_stat_stat (EV_A_ w);
2454 4285
4286 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2455 if (w->interval < MIN_STAT_INTERVAL) 4287 w->interval = MIN_STAT_INTERVAL;
2456 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2457 4288
2458 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4289 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2459 ev_set_priority (&w->timer, ev_priority (w)); 4290 ev_set_priority (&w->timer, ev_priority (w));
2460 4291
2461#if EV_USE_INOTIFY 4292#if EV_USE_INOTIFY
2462 infy_init (EV_A); 4293 infy_init (EV_A);
2463 4294
2464 if (fs_fd >= 0) 4295 if (fs_fd >= 0)
2465 infy_add (EV_A_ w); 4296 infy_add (EV_A_ w);
2466 else 4297 else
2467#endif 4298#endif
4299 {
2468 ev_timer_start (EV_A_ &w->timer); 4300 ev_timer_again (EV_A_ &w->timer);
4301 ev_unref (EV_A);
4302 }
2469 4303
2470 ev_start (EV_A_ (W)w, 1); 4304 ev_start (EV_A_ (W)w, 1);
4305
4306 EV_FREQUENT_CHECK;
2471} 4307}
2472 4308
2473void 4309void
2474ev_stat_stop (EV_P_ ev_stat *w) 4310ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2475{ 4311{
2476 clear_pending (EV_A_ (W)w); 4312 clear_pending (EV_A_ (W)w);
2477 if (expect_false (!ev_is_active (w))) 4313 if (expect_false (!ev_is_active (w)))
2478 return; 4314 return;
2479 4315
4316 EV_FREQUENT_CHECK;
4317
2480#if EV_USE_INOTIFY 4318#if EV_USE_INOTIFY
2481 infy_del (EV_A_ w); 4319 infy_del (EV_A_ w);
2482#endif 4320#endif
4321
4322 if (ev_is_active (&w->timer))
4323 {
4324 ev_ref (EV_A);
2483 ev_timer_stop (EV_A_ &w->timer); 4325 ev_timer_stop (EV_A_ &w->timer);
4326 }
2484 4327
2485 ev_stop (EV_A_ (W)w); 4328 ev_stop (EV_A_ (W)w);
4329
4330 EV_FREQUENT_CHECK;
2486} 4331}
2487#endif 4332#endif
2488 4333
2489#if EV_IDLE_ENABLE 4334#if EV_IDLE_ENABLE
2490void 4335void
2491ev_idle_start (EV_P_ ev_idle *w) 4336ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2492{ 4337{
2493 if (expect_false (ev_is_active (w))) 4338 if (expect_false (ev_is_active (w)))
2494 return; 4339 return;
2495 4340
2496 pri_adjust (EV_A_ (W)w); 4341 pri_adjust (EV_A_ (W)w);
4342
4343 EV_FREQUENT_CHECK;
2497 4344
2498 { 4345 {
2499 int active = ++idlecnt [ABSPRI (w)]; 4346 int active = ++idlecnt [ABSPRI (w)];
2500 4347
2501 ++idleall; 4348 ++idleall;
2502 ev_start (EV_A_ (W)w, active); 4349 ev_start (EV_A_ (W)w, active);
2503 4350
2504 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4351 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2505 idles [ABSPRI (w)][active - 1] = w; 4352 idles [ABSPRI (w)][active - 1] = w;
2506 } 4353 }
4354
4355 EV_FREQUENT_CHECK;
2507} 4356}
2508 4357
2509void 4358void
2510ev_idle_stop (EV_P_ ev_idle *w) 4359ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2511{ 4360{
2512 clear_pending (EV_A_ (W)w); 4361 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w))) 4362 if (expect_false (!ev_is_active (w)))
2514 return; 4363 return;
2515 4364
4365 EV_FREQUENT_CHECK;
4366
2516 { 4367 {
2517 int active = ev_active (w); 4368 int active = ev_active (w);
2518 4369
2519 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4370 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2520 ev_active (idles [ABSPRI (w)][active - 1]) = active; 4371 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2521 4372
2522 ev_stop (EV_A_ (W)w); 4373 ev_stop (EV_A_ (W)w);
2523 --idleall; 4374 --idleall;
2524 } 4375 }
2525}
2526#endif
2527 4376
4377 EV_FREQUENT_CHECK;
4378}
4379#endif
4380
4381#if EV_PREPARE_ENABLE
2528void 4382void
2529ev_prepare_start (EV_P_ ev_prepare *w) 4383ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2530{ 4384{
2531 if (expect_false (ev_is_active (w))) 4385 if (expect_false (ev_is_active (w)))
2532 return; 4386 return;
4387
4388 EV_FREQUENT_CHECK;
2533 4389
2534 ev_start (EV_A_ (W)w, ++preparecnt); 4390 ev_start (EV_A_ (W)w, ++preparecnt);
2535 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4391 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2536 prepares [preparecnt - 1] = w; 4392 prepares [preparecnt - 1] = w;
4393
4394 EV_FREQUENT_CHECK;
2537} 4395}
2538 4396
2539void 4397void
2540ev_prepare_stop (EV_P_ ev_prepare *w) 4398ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2541{ 4399{
2542 clear_pending (EV_A_ (W)w); 4400 clear_pending (EV_A_ (W)w);
2543 if (expect_false (!ev_is_active (w))) 4401 if (expect_false (!ev_is_active (w)))
2544 return; 4402 return;
2545 4403
4404 EV_FREQUENT_CHECK;
4405
2546 { 4406 {
2547 int active = ev_active (w); 4407 int active = ev_active (w);
2548 4408
2549 prepares [active - 1] = prepares [--preparecnt]; 4409 prepares [active - 1] = prepares [--preparecnt];
2550 ev_active (prepares [active - 1]) = active; 4410 ev_active (prepares [active - 1]) = active;
2551 } 4411 }
2552 4412
2553 ev_stop (EV_A_ (W)w); 4413 ev_stop (EV_A_ (W)w);
2554}
2555 4414
4415 EV_FREQUENT_CHECK;
4416}
4417#endif
4418
4419#if EV_CHECK_ENABLE
2556void 4420void
2557ev_check_start (EV_P_ ev_check *w) 4421ev_check_start (EV_P_ ev_check *w) EV_THROW
2558{ 4422{
2559 if (expect_false (ev_is_active (w))) 4423 if (expect_false (ev_is_active (w)))
2560 return; 4424 return;
4425
4426 EV_FREQUENT_CHECK;
2561 4427
2562 ev_start (EV_A_ (W)w, ++checkcnt); 4428 ev_start (EV_A_ (W)w, ++checkcnt);
2563 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4429 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2564 checks [checkcnt - 1] = w; 4430 checks [checkcnt - 1] = w;
4431
4432 EV_FREQUENT_CHECK;
2565} 4433}
2566 4434
2567void 4435void
2568ev_check_stop (EV_P_ ev_check *w) 4436ev_check_stop (EV_P_ ev_check *w) EV_THROW
2569{ 4437{
2570 clear_pending (EV_A_ (W)w); 4438 clear_pending (EV_A_ (W)w);
2571 if (expect_false (!ev_is_active (w))) 4439 if (expect_false (!ev_is_active (w)))
2572 return; 4440 return;
2573 4441
4442 EV_FREQUENT_CHECK;
4443
2574 { 4444 {
2575 int active = ev_active (w); 4445 int active = ev_active (w);
2576 4446
2577 checks [active - 1] = checks [--checkcnt]; 4447 checks [active - 1] = checks [--checkcnt];
2578 ev_active (checks [active - 1]) = active; 4448 ev_active (checks [active - 1]) = active;
2579 } 4449 }
2580 4450
2581 ev_stop (EV_A_ (W)w); 4451 ev_stop (EV_A_ (W)w);
4452
4453 EV_FREQUENT_CHECK;
2582} 4454}
4455#endif
2583 4456
2584#if EV_EMBED_ENABLE 4457#if EV_EMBED_ENABLE
2585void noinline 4458void noinline
2586ev_embed_sweep (EV_P_ ev_embed *w) 4459ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2587{ 4460{
2588 ev_loop (w->other, EVLOOP_NONBLOCK); 4461 ev_run (w->other, EVRUN_NOWAIT);
2589} 4462}
2590 4463
2591static void 4464static void
2592embed_io_cb (EV_P_ ev_io *io, int revents) 4465embed_io_cb (EV_P_ ev_io *io, int revents)
2593{ 4466{
2594 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4467 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2595 4468
2596 if (ev_cb (w)) 4469 if (ev_cb (w))
2597 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4470 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2598 else 4471 else
2599 ev_loop (w->other, EVLOOP_NONBLOCK); 4472 ev_run (w->other, EVRUN_NOWAIT);
2600} 4473}
2601 4474
2602static void 4475static void
2603embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4476embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2604{ 4477{
2605 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4478 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2606 4479
2607 { 4480 {
2608 struct ev_loop *loop = w->other; 4481 EV_P = w->other;
2609 4482
2610 while (fdchangecnt) 4483 while (fdchangecnt)
2611 { 4484 {
2612 fd_reify (EV_A); 4485 fd_reify (EV_A);
2613 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4486 ev_run (EV_A_ EVRUN_NOWAIT);
2614 } 4487 }
2615 } 4488 }
4489}
4490
4491static void
4492embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4493{
4494 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4495
4496 ev_embed_stop (EV_A_ w);
4497
4498 {
4499 EV_P = w->other;
4500
4501 ev_loop_fork (EV_A);
4502 ev_run (EV_A_ EVRUN_NOWAIT);
4503 }
4504
4505 ev_embed_start (EV_A_ w);
2616} 4506}
2617 4507
2618#if 0 4508#if 0
2619static void 4509static void
2620embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4510embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2622 ev_idle_stop (EV_A_ idle); 4512 ev_idle_stop (EV_A_ idle);
2623} 4513}
2624#endif 4514#endif
2625 4515
2626void 4516void
2627ev_embed_start (EV_P_ ev_embed *w) 4517ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2628{ 4518{
2629 if (expect_false (ev_is_active (w))) 4519 if (expect_false (ev_is_active (w)))
2630 return; 4520 return;
2631 4521
2632 { 4522 {
2633 struct ev_loop *loop = w->other; 4523 EV_P = w->other;
2634 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4524 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2635 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4525 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2636 } 4526 }
4527
4528 EV_FREQUENT_CHECK;
2637 4529
2638 ev_set_priority (&w->io, ev_priority (w)); 4530 ev_set_priority (&w->io, ev_priority (w));
2639 ev_io_start (EV_A_ &w->io); 4531 ev_io_start (EV_A_ &w->io);
2640 4532
2641 ev_prepare_init (&w->prepare, embed_prepare_cb); 4533 ev_prepare_init (&w->prepare, embed_prepare_cb);
2642 ev_set_priority (&w->prepare, EV_MINPRI); 4534 ev_set_priority (&w->prepare, EV_MINPRI);
2643 ev_prepare_start (EV_A_ &w->prepare); 4535 ev_prepare_start (EV_A_ &w->prepare);
2644 4536
4537 ev_fork_init (&w->fork, embed_fork_cb);
4538 ev_fork_start (EV_A_ &w->fork);
4539
2645 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4540 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2646 4541
2647 ev_start (EV_A_ (W)w, 1); 4542 ev_start (EV_A_ (W)w, 1);
4543
4544 EV_FREQUENT_CHECK;
2648} 4545}
2649 4546
2650void 4547void
2651ev_embed_stop (EV_P_ ev_embed *w) 4548ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2652{ 4549{
2653 clear_pending (EV_A_ (W)w); 4550 clear_pending (EV_A_ (W)w);
2654 if (expect_false (!ev_is_active (w))) 4551 if (expect_false (!ev_is_active (w)))
2655 return; 4552 return;
2656 4553
4554 EV_FREQUENT_CHECK;
4555
2657 ev_io_stop (EV_A_ &w->io); 4556 ev_io_stop (EV_A_ &w->io);
2658 ev_prepare_stop (EV_A_ &w->prepare); 4557 ev_prepare_stop (EV_A_ &w->prepare);
4558 ev_fork_stop (EV_A_ &w->fork);
2659 4559
2660 ev_stop (EV_A_ (W)w); 4560 ev_stop (EV_A_ (W)w);
4561
4562 EV_FREQUENT_CHECK;
2661} 4563}
2662#endif 4564#endif
2663 4565
2664#if EV_FORK_ENABLE 4566#if EV_FORK_ENABLE
2665void 4567void
2666ev_fork_start (EV_P_ ev_fork *w) 4568ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2667{ 4569{
2668 if (expect_false (ev_is_active (w))) 4570 if (expect_false (ev_is_active (w)))
2669 return; 4571 return;
4572
4573 EV_FREQUENT_CHECK;
2670 4574
2671 ev_start (EV_A_ (W)w, ++forkcnt); 4575 ev_start (EV_A_ (W)w, ++forkcnt);
2672 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4576 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2673 forks [forkcnt - 1] = w; 4577 forks [forkcnt - 1] = w;
4578
4579 EV_FREQUENT_CHECK;
2674} 4580}
2675 4581
2676void 4582void
2677ev_fork_stop (EV_P_ ev_fork *w) 4583ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2678{ 4584{
2679 clear_pending (EV_A_ (W)w); 4585 clear_pending (EV_A_ (W)w);
2680 if (expect_false (!ev_is_active (w))) 4586 if (expect_false (!ev_is_active (w)))
2681 return; 4587 return;
2682 4588
4589 EV_FREQUENT_CHECK;
4590
2683 { 4591 {
2684 int active = ev_active (w); 4592 int active = ev_active (w);
2685 4593
2686 forks [active - 1] = forks [--forkcnt]; 4594 forks [active - 1] = forks [--forkcnt];
2687 ev_active (forks [active - 1]) = active; 4595 ev_active (forks [active - 1]) = active;
2688 } 4596 }
2689 4597
2690 ev_stop (EV_A_ (W)w); 4598 ev_stop (EV_A_ (W)w);
4599
4600 EV_FREQUENT_CHECK;
4601}
4602#endif
4603
4604#if EV_CLEANUP_ENABLE
4605void
4606ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4607{
4608 if (expect_false (ev_is_active (w)))
4609 return;
4610
4611 EV_FREQUENT_CHECK;
4612
4613 ev_start (EV_A_ (W)w, ++cleanupcnt);
4614 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4615 cleanups [cleanupcnt - 1] = w;
4616
4617 /* cleanup watchers should never keep a refcount on the loop */
4618 ev_unref (EV_A);
4619 EV_FREQUENT_CHECK;
4620}
4621
4622void
4623ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4624{
4625 clear_pending (EV_A_ (W)w);
4626 if (expect_false (!ev_is_active (w)))
4627 return;
4628
4629 EV_FREQUENT_CHECK;
4630 ev_ref (EV_A);
4631
4632 {
4633 int active = ev_active (w);
4634
4635 cleanups [active - 1] = cleanups [--cleanupcnt];
4636 ev_active (cleanups [active - 1]) = active;
4637 }
4638
4639 ev_stop (EV_A_ (W)w);
4640
4641 EV_FREQUENT_CHECK;
2691} 4642}
2692#endif 4643#endif
2693 4644
2694#if EV_ASYNC_ENABLE 4645#if EV_ASYNC_ENABLE
2695void 4646void
2696ev_async_start (EV_P_ ev_async *w) 4647ev_async_start (EV_P_ ev_async *w) EV_THROW
2697{ 4648{
2698 if (expect_false (ev_is_active (w))) 4649 if (expect_false (ev_is_active (w)))
2699 return; 4650 return;
2700 4651
4652 w->sent = 0;
4653
2701 evpipe_init (EV_A); 4654 evpipe_init (EV_A);
4655
4656 EV_FREQUENT_CHECK;
2702 4657
2703 ev_start (EV_A_ (W)w, ++asynccnt); 4658 ev_start (EV_A_ (W)w, ++asynccnt);
2704 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4659 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2705 asyncs [asynccnt - 1] = w; 4660 asyncs [asynccnt - 1] = w;
4661
4662 EV_FREQUENT_CHECK;
2706} 4663}
2707 4664
2708void 4665void
2709ev_async_stop (EV_P_ ev_async *w) 4666ev_async_stop (EV_P_ ev_async *w) EV_THROW
2710{ 4667{
2711 clear_pending (EV_A_ (W)w); 4668 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 4669 if (expect_false (!ev_is_active (w)))
2713 return; 4670 return;
2714 4671
4672 EV_FREQUENT_CHECK;
4673
2715 { 4674 {
2716 int active = ev_active (w); 4675 int active = ev_active (w);
2717 4676
2718 asyncs [active - 1] = asyncs [--asynccnt]; 4677 asyncs [active - 1] = asyncs [--asynccnt];
2719 ev_active (asyncs [active - 1]) = active; 4678 ev_active (asyncs [active - 1]) = active;
2720 } 4679 }
2721 4680
2722 ev_stop (EV_A_ (W)w); 4681 ev_stop (EV_A_ (W)w);
4682
4683 EV_FREQUENT_CHECK;
2723} 4684}
2724 4685
2725void 4686void
2726ev_async_send (EV_P_ ev_async *w) 4687ev_async_send (EV_P_ ev_async *w) EV_THROW
2727{ 4688{
2728 w->sent = 1; 4689 w->sent = 1;
2729 evpipe_write (EV_A_ &gotasync); 4690 evpipe_write (EV_A_ &async_pending);
2730} 4691}
2731#endif 4692#endif
2732 4693
2733/*****************************************************************************/ 4694/*****************************************************************************/
2734 4695
… …
2744once_cb (EV_P_ struct ev_once *once, int revents) 4705once_cb (EV_P_ struct ev_once *once, int revents)
2745{ 4706{
2746 void (*cb)(int revents, void *arg) = once->cb; 4707 void (*cb)(int revents, void *arg) = once->cb;
2747 void *arg = once->arg; 4708 void *arg = once->arg;
2748 4709
2749 ev_io_stop (EV_A_ &once->io); 4710 ev_io_stop (EV_A_ &once->io);
2750 ev_timer_stop (EV_A_ &once->to); 4711 ev_timer_stop (EV_A_ &once->to);
2751 ev_free (once); 4712 ev_free (once);
2752 4713
2753 cb (revents, arg); 4714 cb (revents, arg);
2754} 4715}
2755 4716
2756static void 4717static void
2757once_cb_io (EV_P_ ev_io *w, int revents) 4718once_cb_io (EV_P_ ev_io *w, int revents)
2758{ 4719{
2759 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4720 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4721
4722 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2760} 4723}
2761 4724
2762static void 4725static void
2763once_cb_to (EV_P_ ev_timer *w, int revents) 4726once_cb_to (EV_P_ ev_timer *w, int revents)
2764{ 4727{
2765 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4728 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4729
4730 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2766} 4731}
2767 4732
2768void 4733void
2769ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4734ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2770{ 4735{
2771 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4736 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2772 4737
2773 if (expect_false (!once)) 4738 if (expect_false (!once))
2774 { 4739 {
2775 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4740 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2776 return; 4741 return;
2777 } 4742 }
2778 4743
2779 once->cb = cb; 4744 once->cb = cb;
2780 once->arg = arg; 4745 once->arg = arg;
… …
2792 ev_timer_set (&once->to, timeout, 0.); 4757 ev_timer_set (&once->to, timeout, 0.);
2793 ev_timer_start (EV_A_ &once->to); 4758 ev_timer_start (EV_A_ &once->to);
2794 } 4759 }
2795} 4760}
2796 4761
4762/*****************************************************************************/
4763
4764#if EV_WALK_ENABLE
4765void ecb_cold
4766ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4767{
4768 int i, j;
4769 ev_watcher_list *wl, *wn;
4770
4771 if (types & (EV_IO | EV_EMBED))
4772 for (i = 0; i < anfdmax; ++i)
4773 for (wl = anfds [i].head; wl; )
4774 {
4775 wn = wl->next;
4776
4777#if EV_EMBED_ENABLE
4778 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4779 {
4780 if (types & EV_EMBED)
4781 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4782 }
4783 else
4784#endif
4785#if EV_USE_INOTIFY
4786 if (ev_cb ((ev_io *)wl) == infy_cb)
4787 ;
4788 else
4789#endif
4790 if ((ev_io *)wl != &pipe_w)
4791 if (types & EV_IO)
4792 cb (EV_A_ EV_IO, wl);
4793
4794 wl = wn;
4795 }
4796
4797 if (types & (EV_TIMER | EV_STAT))
4798 for (i = timercnt + HEAP0; i-- > HEAP0; )
4799#if EV_STAT_ENABLE
4800 /*TODO: timer is not always active*/
4801 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4802 {
4803 if (types & EV_STAT)
4804 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4805 }
4806 else
4807#endif
4808 if (types & EV_TIMER)
4809 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4810
4811#if EV_PERIODIC_ENABLE
4812 if (types & EV_PERIODIC)
4813 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4814 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4815#endif
4816
4817#if EV_IDLE_ENABLE
4818 if (types & EV_IDLE)
4819 for (j = NUMPRI; j--; )
4820 for (i = idlecnt [j]; i--; )
4821 cb (EV_A_ EV_IDLE, idles [j][i]);
4822#endif
4823
4824#if EV_FORK_ENABLE
4825 if (types & EV_FORK)
4826 for (i = forkcnt; i--; )
4827 if (ev_cb (forks [i]) != embed_fork_cb)
4828 cb (EV_A_ EV_FORK, forks [i]);
4829#endif
4830
4831#if EV_ASYNC_ENABLE
4832 if (types & EV_ASYNC)
4833 for (i = asynccnt; i--; )
4834 cb (EV_A_ EV_ASYNC, asyncs [i]);
4835#endif
4836
4837#if EV_PREPARE_ENABLE
4838 if (types & EV_PREPARE)
4839 for (i = preparecnt; i--; )
4840# if EV_EMBED_ENABLE
4841 if (ev_cb (prepares [i]) != embed_prepare_cb)
4842# endif
4843 cb (EV_A_ EV_PREPARE, prepares [i]);
4844#endif
4845
4846#if EV_CHECK_ENABLE
4847 if (types & EV_CHECK)
4848 for (i = checkcnt; i--; )
4849 cb (EV_A_ EV_CHECK, checks [i]);
4850#endif
4851
4852#if EV_SIGNAL_ENABLE
4853 if (types & EV_SIGNAL)
4854 for (i = 0; i < EV_NSIG - 1; ++i)
4855 for (wl = signals [i].head; wl; )
4856 {
4857 wn = wl->next;
4858 cb (EV_A_ EV_SIGNAL, wl);
4859 wl = wn;
4860 }
4861#endif
4862
4863#if EV_CHILD_ENABLE
4864 if (types & EV_CHILD)
4865 for (i = (EV_PID_HASHSIZE); i--; )
4866 for (wl = childs [i]; wl; )
4867 {
4868 wn = wl->next;
4869 cb (EV_A_ EV_CHILD, wl);
4870 wl = wn;
4871 }
4872#endif
4873/* EV_STAT 0x00001000 /* stat data changed */
4874/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4875}
4876#endif
4877
2797#if EV_MULTIPLICITY 4878#if EV_MULTIPLICITY
2798 #include "ev_wrap.h" 4879 #include "ev_wrap.h"
2799#endif 4880#endif
2800 4881
2801#ifdef __cplusplus
2802}
2803#endif
2804

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