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Comparing libev/ev.c (file contents):
Revision 1.295 by root, Wed Jul 8 04:29:31 2009 UTC vs.
Revision 1.464 by root, Fri Mar 21 16:41:04 2014 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
63# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
64# endif 66# endif
65 67
66# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
109# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
114# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
120# endif 127# endif
121 128
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
125# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
126# define EV_USE_PORT 0
127# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
128# endif 136# endif
129 137
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
133# else
134# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
136# endif 145# endif
137 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
138# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
139# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
144# endif 163# endif
145 164
146#endif 165#endif
147 166
148#include <math.h>
149#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
150#include <fcntl.h> 169#include <fcntl.h>
151#include <stddef.h> 170#include <stddef.h>
152 171
153#include <stdio.h> 172#include <stdio.h>
154 173
155#include <assert.h> 174#include <assert.h>
156#include <errno.h> 175#include <errno.h>
157#include <sys/types.h> 176#include <sys/types.h>
158#include <time.h> 177#include <time.h>
178#include <limits.h>
159 179
160#include <signal.h> 180#include <signal.h>
161 181
162#ifdef EV_H 182#ifdef EV_H
163# include EV_H 183# include EV_H
164#else 184#else
165# 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
166#endif 197#endif
167 198
168#ifndef _WIN32 199#ifndef _WIN32
169# include <sys/time.h> 200# include <sys/time.h>
170# include <sys/wait.h> 201# include <sys/wait.h>
171# include <unistd.h> 202# include <unistd.h>
172#else 203#else
173# include <io.h> 204# include <io.h>
174# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
175# include <windows.h> 207# include <windows.h>
176# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
177# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
178# endif 210# endif
211# undef EV_AVOID_STDIO
179#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
180 221
181/* 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 */
182 223
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
183#ifndef EV_USE_CLOCK_SYSCALL 253#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2 254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
185# define EV_USE_CLOCK_SYSCALL 1 255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
186# else 256# else
187# define EV_USE_CLOCK_SYSCALL 0 257# define EV_USE_CLOCK_SYSCALL 0
188# endif 258# endif
189#endif 259#endif
190 260
191#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1 263# define EV_USE_MONOTONIC EV_FEATURE_OS
194# else 264# else
195# define EV_USE_MONOTONIC 0 265# define EV_USE_MONOTONIC 0
196# endif 266# endif
197#endif 267#endif
198 268
… …
200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 270# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif 271#endif
202 272
203#ifndef EV_USE_NANOSLEEP 273#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L 274# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1 275# define EV_USE_NANOSLEEP EV_FEATURE_OS
206# else 276# else
207# define EV_USE_NANOSLEEP 0 277# define EV_USE_NANOSLEEP 0
208# endif 278# endif
209#endif 279#endif
210 280
211#ifndef EV_USE_SELECT 281#ifndef EV_USE_SELECT
212# define EV_USE_SELECT 1 282# define EV_USE_SELECT EV_FEATURE_BACKENDS
213#endif 283#endif
214 284
215#ifndef EV_USE_POLL 285#ifndef EV_USE_POLL
216# ifdef _WIN32 286# ifdef _WIN32
217# define EV_USE_POLL 0 287# define EV_USE_POLL 0
218# else 288# else
219# define EV_USE_POLL 1 289# define EV_USE_POLL EV_FEATURE_BACKENDS
220# endif 290# endif
221#endif 291#endif
222 292
223#ifndef EV_USE_EPOLL 293#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1 295# define EV_USE_EPOLL EV_FEATURE_BACKENDS
226# else 296# else
227# define EV_USE_EPOLL 0 297# define EV_USE_EPOLL 0
228# endif 298# endif
229#endif 299#endif
230 300
… …
236# define EV_USE_PORT 0 306# define EV_USE_PORT 0
237#endif 307#endif
238 308
239#ifndef EV_USE_INOTIFY 309#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1 311# define EV_USE_INOTIFY EV_FEATURE_OS
242# else 312# else
243# define EV_USE_INOTIFY 0 313# define EV_USE_INOTIFY 0
244# endif 314# endif
245#endif 315#endif
246 316
247#ifndef EV_PID_HASHSIZE 317#ifndef EV_PID_HASHSIZE
248# if EV_MINIMAL 318# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
249# define EV_PID_HASHSIZE 1
250# else
251# define EV_PID_HASHSIZE 16
252# endif
253#endif 319#endif
254 320
255#ifndef EV_INOTIFY_HASHSIZE 321#ifndef EV_INOTIFY_HASHSIZE
256# if EV_MINIMAL 322# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
257# define EV_INOTIFY_HASHSIZE 1
258# else
259# define EV_INOTIFY_HASHSIZE 16
260# endif
261#endif 323#endif
262 324
263#ifndef EV_USE_EVENTFD 325#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 326# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1 327# define EV_USE_EVENTFD EV_FEATURE_OS
266# else 328# else
267# define EV_USE_EVENTFD 0 329# define EV_USE_EVENTFD 0
330# endif
331#endif
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
268# endif 338# endif
269#endif 339#endif
270 340
271#if 0 /* debugging */ 341#if 0 /* debugging */
272# define EV_VERIFY 3 342# define EV_VERIFY 3
273# define EV_USE_4HEAP 1 343# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1 344# define EV_HEAP_CACHE_AT 1
275#endif 345#endif
276 346
277#ifndef EV_VERIFY 347#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL 348# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
279#endif 349#endif
280 350
281#ifndef EV_USE_4HEAP 351#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL 352# define EV_USE_4HEAP EV_FEATURE_DATA
283#endif 353#endif
284 354
285#ifndef EV_HEAP_CACHE_AT 355#ifndef EV_HEAP_CACHE_AT
286# 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
287#endif 373#endif
288 374
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */ 376/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL 377#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h> 378# include <sys/syscall.h>
293# ifdef SYS_clock_gettime 379# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC 381# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1 382# define EV_USE_MONOTONIC 1
297# else 383# else
… …
316# undef EV_USE_INOTIFY 402# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0 403# define EV_USE_INOTIFY 0
318#endif 404#endif
319 405
320#if !EV_USE_NANOSLEEP 406#if !EV_USE_NANOSLEEP
321# ifndef _WIN32 407/* hp-ux has it in sys/time.h, which we unconditionally include above */
408# if !defined _WIN32 && !defined __hpux
322# include <sys/select.h> 409# include <sys/select.h>
323# endif 410# endif
324#endif 411#endif
325 412
326#if EV_USE_INOTIFY 413#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h> 414# include <sys/statfs.h>
329# include <sys/inotify.h> 415# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW 417# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY 418# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0 419# define EV_USE_INOTIFY 0
334# endif 420# endif
335#endif 421#endif
336 422
337#if EV_SELECT_IS_WINSOCKET
338# include <winsock.h>
339#endif
340
341#if EV_USE_EVENTFD 423#if EV_USE_EVENTFD
342/* 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 */
343# include <stdint.h> 425# include <stdint.h>
344# ifdef __cplusplus 426# ifndef EFD_NONBLOCK
345extern "C" { 427# define EFD_NONBLOCK O_NONBLOCK
346# endif 428# endif
347int eventfd (unsigned int initval, int flags); 429# ifndef EFD_CLOEXEC
348# ifdef __cplusplus 430# ifdef O_CLOEXEC
349} 431# define EFD_CLOEXEC O_CLOEXEC
432# else
433# define EFD_CLOEXEC 02000000
434# endif
350# 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};
351#endif 459#endif
352 460
353/**/ 461/**/
354 462
355#if EV_VERIFY >= 3 463#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 464# define EV_FREQUENT_CHECK ev_verify (EV_A)
357#else 465#else
358# define EV_FREQUENT_CHECK do { } while (0) 466# define EV_FREQUENT_CHECK do { } while (0)
359#endif 467#endif
360 468
361/* 469/*
362 * This is used to avoid floating point rounding problems. 470 * This is used to work around floating point rounding problems.
363 * It is added to ev_rt_now when scheduling periodics
364 * to ensure progress, time-wise, even when rounding
365 * errors are against us.
366 * This value is good at least till the year 4000. 471 * This value is good at least till the year 4000.
367 * Better solutions welcome.
368 */ 472 */
369#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 */
370 475
371#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) */
372#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) */
373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
374 478
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
513#ifndef ECB_H
514#define ECB_H
515
516/* 16 bits major, 16 bits minor */
517#define ECB_VERSION 0x00010003
518
519#ifdef _WIN32
520 typedef signed char int8_t;
521 typedef unsigned char uint8_t;
522 typedef signed short int16_t;
523 typedef unsigned short uint16_t;
524 typedef signed int int32_t;
525 typedef unsigned int uint32_t;
375#if __GNUC__ >= 4 526 #if __GNUC__
376# define expect(expr,value) __builtin_expect ((expr),(value)) 527 typedef signed long long int64_t;
377# define noinline __attribute__ ((noinline)) 528 typedef unsigned long long uint64_t;
529 #else /* _MSC_VER || __BORLANDC__ */
530 typedef signed __int64 int64_t;
531 typedef unsigned __int64 uint64_t;
532 #endif
533 #ifdef _WIN64
534 #define ECB_PTRSIZE 8
535 typedef uint64_t uintptr_t;
536 typedef int64_t intptr_t;
537 #else
538 #define ECB_PTRSIZE 4
539 typedef uint32_t uintptr_t;
540 typedef int32_t intptr_t;
541 #endif
378#else 542#else
379# define expect(expr,value) (expr) 543 #include <inttypes.h>
380# define noinline 544 #if UINTMAX_MAX > 0xffffffffU
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 545 #define ECB_PTRSIZE 8
382# define inline 546 #else
547 #define ECB_PTRSIZE 4
548 #endif
383# endif 549#endif
550
551/* work around x32 idiocy by defining proper macros */
552#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
553 #if _ILP32
554 #define ECB_AMD64_X32 1
555 #else
556 #define ECB_AMD64 1
384#endif 557 #endif
558#endif
385 559
560/* many compilers define _GNUC_ to some versions but then only implement
561 * what their idiot authors think are the "more important" extensions,
562 * causing enormous grief in return for some better fake benchmark numbers.
563 * or so.
564 * we try to detect these and simply assume they are not gcc - if they have
565 * an issue with that they should have done it right in the first place.
566 */
567#ifndef ECB_GCC_VERSION
568 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
569 #define ECB_GCC_VERSION(major,minor) 0
570 #else
571 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
572 #endif
573#endif
574
575#define ECB_CPP (__cplusplus+0)
576#define ECB_CPP11 (__cplusplus >= 201103L)
577
578#if ECB_CPP
579 #define ECB_C 0
580 #define ECB_STDC_VERSION 0
581#else
582 #define ECB_C 1
583 #define ECB_STDC_VERSION __STDC_VERSION__
584#endif
585
586#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
587#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
588
589#if ECB_CPP
590 #define ECB_EXTERN_C extern "C"
591 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
592 #define ECB_EXTERN_C_END }
593#else
594 #define ECB_EXTERN_C extern
595 #define ECB_EXTERN_C_BEG
596 #define ECB_EXTERN_C_END
597#endif
598
599/*****************************************************************************/
600
601/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
602/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
603
604#if ECB_NO_THREADS
605 #define ECB_NO_SMP 1
606#endif
607
608#if ECB_NO_SMP
609 #define ECB_MEMORY_FENCE do { } while (0)
610#endif
611
612#ifndef ECB_MEMORY_FENCE
613 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
614 #if __i386 || __i386__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
616 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
617 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
618 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
619 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
620 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
621 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
622 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
623 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
624 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
625 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
627 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
628 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
629 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
630 #elif __aarch64__
631 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
632 #elif (__sparc || __sparc__) && !__sparcv8
633 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
634 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
635 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
636 #elif defined __s390__ || defined __s390x__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
638 #elif defined __mips__
639 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
640 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
641 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
642 #elif defined __alpha__
643 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
644 #elif defined __hppa__
645 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
647 #elif defined __ia64__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
649 #elif defined __m68k__
650 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
651 #elif defined __m88k__
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
653 #elif defined __sh__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
655 #endif
656 #endif
657#endif
658
659#ifndef ECB_MEMORY_FENCE
660 #if ECB_GCC_VERSION(4,7)
661 /* see comment below (stdatomic.h) about the C11 memory model. */
662 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
663 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
664 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
665
666 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
667 * without risking compile time errors with other compilers. We *could*
668 * define our own ecb_clang_has_feature, but I just can't be bothered to work
669 * around this shit time and again.
670 * #elif defined __clang && __has_feature (cxx_atomic)
671 * // see comment below (stdatomic.h) about the C11 memory model.
672 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
673 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
674 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
675 */
676
677 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
678 #define ECB_MEMORY_FENCE __sync_synchronize ()
679 #elif _MSC_VER >= 1500 /* VC++ 2008 */
680 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
681 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
682 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
683 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
684 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
685 #elif _MSC_VER >= 1400 /* VC++ 2005 */
686 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
687 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
688 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
689 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
690 #elif defined _WIN32
691 #include <WinNT.h>
692 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
693 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
694 #include <mbarrier.h>
695 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
696 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
697 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
698 #elif __xlC__
699 #define ECB_MEMORY_FENCE __sync ()
700 #endif
701#endif
702
703#ifndef ECB_MEMORY_FENCE
704 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
705 /* we assume that these memory fences work on all variables/all memory accesses, */
706 /* not just C11 atomics and atomic accesses */
707 #include <stdatomic.h>
708 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
709 /* any fence other than seq_cst, which isn't very efficient for us. */
710 /* Why that is, we don't know - either the C11 memory model is quite useless */
711 /* for most usages, or gcc and clang have a bug */
712 /* I *currently* lean towards the latter, and inefficiently implement */
713 /* all three of ecb's fences as a seq_cst fence */
714 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
715 /* for all __atomic_thread_fence's except seq_cst */
716 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
717 #endif
718#endif
719
720#ifndef ECB_MEMORY_FENCE
721 #if !ECB_AVOID_PTHREADS
722 /*
723 * if you get undefined symbol references to pthread_mutex_lock,
724 * or failure to find pthread.h, then you should implement
725 * the ECB_MEMORY_FENCE operations for your cpu/compiler
726 * OR provide pthread.h and link against the posix thread library
727 * of your system.
728 */
729 #include <pthread.h>
730 #define ECB_NEEDS_PTHREADS 1
731 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
732
733 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
734 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
735 #endif
736#endif
737
738#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
739 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
740#endif
741
742#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
743 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
744#endif
745
746/*****************************************************************************/
747
748#if __cplusplus
749 #define ecb_inline static inline
750#elif ECB_GCC_VERSION(2,5)
751 #define ecb_inline static __inline__
752#elif ECB_C99
753 #define ecb_inline static inline
754#else
755 #define ecb_inline static
756#endif
757
758#if ECB_GCC_VERSION(3,3)
759 #define ecb_restrict __restrict__
760#elif ECB_C99
761 #define ecb_restrict restrict
762#else
763 #define ecb_restrict
764#endif
765
766typedef int ecb_bool;
767
768#define ECB_CONCAT_(a, b) a ## b
769#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
770#define ECB_STRINGIFY_(a) # a
771#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
772
773#define ecb_function_ ecb_inline
774
775#if ECB_GCC_VERSION(3,1)
776 #define ecb_attribute(attrlist) __attribute__(attrlist)
777 #define ecb_is_constant(expr) __builtin_constant_p (expr)
778 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
779 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
780#else
781 #define ecb_attribute(attrlist)
782
783 /* possible C11 impl for integral types
784 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
785 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
786
787 #define ecb_is_constant(expr) 0
788 #define ecb_expect(expr,value) (expr)
789 #define ecb_prefetch(addr,rw,locality)
790#endif
791
792/* no emulation for ecb_decltype */
793#if ECB_GCC_VERSION(4,5)
794 #define ecb_decltype(x) __decltype(x)
795#elif ECB_GCC_VERSION(3,0)
796 #define ecb_decltype(x) __typeof(x)
797#endif
798
799#define ecb_noinline ecb_attribute ((__noinline__))
800#define ecb_unused ecb_attribute ((__unused__))
801#define ecb_const ecb_attribute ((__const__))
802#define ecb_pure ecb_attribute ((__pure__))
803
804#if ECB_C11
805 #define ecb_noreturn _Noreturn
806#else
807 #define ecb_noreturn ecb_attribute ((__noreturn__))
808#endif
809
810#if ECB_GCC_VERSION(4,3)
811 #define ecb_artificial ecb_attribute ((__artificial__))
812 #define ecb_hot ecb_attribute ((__hot__))
813 #define ecb_cold ecb_attribute ((__cold__))
814#else
815 #define ecb_artificial
816 #define ecb_hot
817 #define ecb_cold
818#endif
819
820/* put around conditional expressions if you are very sure that the */
821/* expression is mostly true or mostly false. note that these return */
822/* booleans, not the expression. */
386#define expect_false(expr) expect ((expr) != 0, 0) 823#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
387#define expect_true(expr) expect ((expr) != 0, 1) 824#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
825/* for compatibility to the rest of the world */
826#define ecb_likely(expr) ecb_expect_true (expr)
827#define ecb_unlikely(expr) ecb_expect_false (expr)
828
829/* count trailing zero bits and count # of one bits */
830#if ECB_GCC_VERSION(3,4)
831 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
832 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
833 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
834 #define ecb_ctz32(x) __builtin_ctz (x)
835 #define ecb_ctz64(x) __builtin_ctzll (x)
836 #define ecb_popcount32(x) __builtin_popcount (x)
837 /* no popcountll */
838#else
839 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
840 ecb_function_ int
841 ecb_ctz32 (uint32_t x)
842 {
843 int r = 0;
844
845 x &= ~x + 1; /* this isolates the lowest bit */
846
847#if ECB_branchless_on_i386
848 r += !!(x & 0xaaaaaaaa) << 0;
849 r += !!(x & 0xcccccccc) << 1;
850 r += !!(x & 0xf0f0f0f0) << 2;
851 r += !!(x & 0xff00ff00) << 3;
852 r += !!(x & 0xffff0000) << 4;
853#else
854 if (x & 0xaaaaaaaa) r += 1;
855 if (x & 0xcccccccc) r += 2;
856 if (x & 0xf0f0f0f0) r += 4;
857 if (x & 0xff00ff00) r += 8;
858 if (x & 0xffff0000) r += 16;
859#endif
860
861 return r;
862 }
863
864 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
865 ecb_function_ int
866 ecb_ctz64 (uint64_t x)
867 {
868 int shift = x & 0xffffffffU ? 0 : 32;
869 return ecb_ctz32 (x >> shift) + shift;
870 }
871
872 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
873 ecb_function_ int
874 ecb_popcount32 (uint32_t x)
875 {
876 x -= (x >> 1) & 0x55555555;
877 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
878 x = ((x >> 4) + x) & 0x0f0f0f0f;
879 x *= 0x01010101;
880
881 return x >> 24;
882 }
883
884 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
885 ecb_function_ int ecb_ld32 (uint32_t x)
886 {
887 int r = 0;
888
889 if (x >> 16) { x >>= 16; r += 16; }
890 if (x >> 8) { x >>= 8; r += 8; }
891 if (x >> 4) { x >>= 4; r += 4; }
892 if (x >> 2) { x >>= 2; r += 2; }
893 if (x >> 1) { r += 1; }
894
895 return r;
896 }
897
898 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
899 ecb_function_ int ecb_ld64 (uint64_t x)
900 {
901 int r = 0;
902
903 if (x >> 32) { x >>= 32; r += 32; }
904
905 return r + ecb_ld32 (x);
906 }
907#endif
908
909ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
910ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
911ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
912ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
913
914ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
915ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
916{
917 return ( (x * 0x0802U & 0x22110U)
918 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
919}
920
921ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
922ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
923{
924 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
925 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
926 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
927 x = ( x >> 8 ) | ( x << 8);
928
929 return x;
930}
931
932ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
933ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
934{
935 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
936 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
937 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
938 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
939 x = ( x >> 16 ) | ( x << 16);
940
941 return x;
942}
943
944/* popcount64 is only available on 64 bit cpus as gcc builtin */
945/* so for this version we are lazy */
946ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
947ecb_function_ int
948ecb_popcount64 (uint64_t x)
949{
950 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
951}
952
953ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
954ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
955ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
956ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
957ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
958ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
959ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
960ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
961
962ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
963ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
964ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
965ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
966ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
967ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
968ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
969ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
970
971#if ECB_GCC_VERSION(4,3)
972 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
973 #define ecb_bswap32(x) __builtin_bswap32 (x)
974 #define ecb_bswap64(x) __builtin_bswap64 (x)
975#else
976 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
977 ecb_function_ uint16_t
978 ecb_bswap16 (uint16_t x)
979 {
980 return ecb_rotl16 (x, 8);
981 }
982
983 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
984 ecb_function_ uint32_t
985 ecb_bswap32 (uint32_t x)
986 {
987 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
988 }
989
990 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
991 ecb_function_ uint64_t
992 ecb_bswap64 (uint64_t x)
993 {
994 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
995 }
996#endif
997
998#if ECB_GCC_VERSION(4,5)
999 #define ecb_unreachable() __builtin_unreachable ()
1000#else
1001 /* this seems to work fine, but gcc always emits a warning for it :/ */
1002 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1003 ecb_inline void ecb_unreachable (void) { }
1004#endif
1005
1006/* try to tell the compiler that some condition is definitely true */
1007#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1008
1009ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1010ecb_inline unsigned char
1011ecb_byteorder_helper (void)
1012{
1013 /* the union code still generates code under pressure in gcc, */
1014 /* but less than using pointers, and always seems to */
1015 /* successfully return a constant. */
1016 /* the reason why we have this horrible preprocessor mess */
1017 /* is to avoid it in all cases, at least on common architectures */
1018 /* or when using a recent enough gcc version (>= 4.6) */
1019#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1020 return 0x44;
1021#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1022 return 0x44;
1023#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1024 return 0x11;
1025#else
1026 union
1027 {
1028 uint32_t i;
1029 uint8_t c;
1030 } u = { 0x11223344 };
1031 return u.c;
1032#endif
1033}
1034
1035ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1036ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1037ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1038ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1039
1040#if ECB_GCC_VERSION(3,0) || ECB_C99
1041 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1042#else
1043 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1044#endif
1045
1046#if __cplusplus
1047 template<typename T>
1048 static inline T ecb_div_rd (T val, T div)
1049 {
1050 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1051 }
1052 template<typename T>
1053 static inline T ecb_div_ru (T val, T div)
1054 {
1055 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1056 }
1057#else
1058 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1059 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1060#endif
1061
1062#if ecb_cplusplus_does_not_suck
1063 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1064 template<typename T, int N>
1065 static inline int ecb_array_length (const T (&arr)[N])
1066 {
1067 return N;
1068 }
1069#else
1070 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1071#endif
1072
1073/*******************************************************************************/
1074/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1075
1076/* basically, everything uses "ieee pure-endian" floating point numbers */
1077/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1078#if 0 \
1079 || __i386 || __i386__ \
1080 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1081 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1082 || defined __arm__ && defined __ARM_EABI__ \
1083 || defined __s390__ || defined __s390x__ \
1084 || defined __mips__ \
1085 || defined __alpha__ \
1086 || defined __hppa__ \
1087 || defined __ia64__ \
1088 || defined __m68k__ \
1089 || defined __m88k__ \
1090 || defined __sh__ \
1091 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1092 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__))
1093 #define ECB_STDFP 1
1094 #include <string.h> /* for memcpy */
1095#else
1096 #define ECB_STDFP 0
1097#endif
1098
1099#ifndef ECB_NO_LIBM
1100
1101 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1102
1103 /* only the oldest of old doesn't have this one. solaris. */
1104 #ifdef INFINITY
1105 #define ECB_INFINITY INFINITY
1106 #else
1107 #define ECB_INFINITY HUGE_VAL
1108 #endif
1109
1110 #ifdef NAN
1111 #define ECB_NAN NAN
1112 #else
1113 #define ECB_NAN ECB_INFINITY
1114 #endif
1115
1116 /* converts an ieee half/binary16 to a float */
1117 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1118 ecb_function_ float
1119 ecb_binary16_to_float (uint16_t x)
1120 {
1121 int e = (x >> 10) & 0x1f;
1122 int m = x & 0x3ff;
1123 float r;
1124
1125 if (!e ) r = ldexpf (m , -24);
1126 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1127 else if (m ) r = ECB_NAN;
1128 else r = ECB_INFINITY;
1129
1130 return x & 0x8000 ? -r : r;
1131 }
1132
1133 /* convert a float to ieee single/binary32 */
1134 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1135 ecb_function_ uint32_t
1136 ecb_float_to_binary32 (float x)
1137 {
1138 uint32_t r;
1139
1140 #if ECB_STDFP
1141 memcpy (&r, &x, 4);
1142 #else
1143 /* slow emulation, works for anything but -0 */
1144 uint32_t m;
1145 int e;
1146
1147 if (x == 0e0f ) return 0x00000000U;
1148 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1149 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1150 if (x != x ) return 0x7fbfffffU;
1151
1152 m = frexpf (x, &e) * 0x1000000U;
1153
1154 r = m & 0x80000000U;
1155
1156 if (r)
1157 m = -m;
1158
1159 if (e <= -126)
1160 {
1161 m &= 0xffffffU;
1162 m >>= (-125 - e);
1163 e = -126;
1164 }
1165
1166 r |= (e + 126) << 23;
1167 r |= m & 0x7fffffU;
1168 #endif
1169
1170 return r;
1171 }
1172
1173 /* converts an ieee single/binary32 to a float */
1174 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1175 ecb_function_ float
1176 ecb_binary32_to_float (uint32_t x)
1177 {
1178 float r;
1179
1180 #if ECB_STDFP
1181 memcpy (&r, &x, 4);
1182 #else
1183 /* emulation, only works for normals and subnormals and +0 */
1184 int neg = x >> 31;
1185 int e = (x >> 23) & 0xffU;
1186
1187 x &= 0x7fffffU;
1188
1189 if (e)
1190 x |= 0x800000U;
1191 else
1192 e = 1;
1193
1194 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1195 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1196
1197 r = neg ? -r : r;
1198 #endif
1199
1200 return r;
1201 }
1202
1203 /* convert a double to ieee double/binary64 */
1204 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1205 ecb_function_ uint64_t
1206 ecb_double_to_binary64 (double x)
1207 {
1208 uint64_t r;
1209
1210 #if ECB_STDFP
1211 memcpy (&r, &x, 8);
1212 #else
1213 /* slow emulation, works for anything but -0 */
1214 uint64_t m;
1215 int e;
1216
1217 if (x == 0e0 ) return 0x0000000000000000U;
1218 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1219 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1220 if (x != x ) return 0X7ff7ffffffffffffU;
1221
1222 m = frexp (x, &e) * 0x20000000000000U;
1223
1224 r = m & 0x8000000000000000;;
1225
1226 if (r)
1227 m = -m;
1228
1229 if (e <= -1022)
1230 {
1231 m &= 0x1fffffffffffffU;
1232 m >>= (-1021 - e);
1233 e = -1022;
1234 }
1235
1236 r |= ((uint64_t)(e + 1022)) << 52;
1237 r |= m & 0xfffffffffffffU;
1238 #endif
1239
1240 return r;
1241 }
1242
1243 /* converts an ieee double/binary64 to a double */
1244 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1245 ecb_function_ double
1246 ecb_binary64_to_double (uint64_t x)
1247 {
1248 double r;
1249
1250 #if ECB_STDFP
1251 memcpy (&r, &x, 8);
1252 #else
1253 /* emulation, only works for normals and subnormals and +0 */
1254 int neg = x >> 63;
1255 int e = (x >> 52) & 0x7ffU;
1256
1257 x &= 0xfffffffffffffU;
1258
1259 if (e)
1260 x |= 0x10000000000000U;
1261 else
1262 e = 1;
1263
1264 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1265 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1266
1267 r = neg ? -r : r;
1268 #endif
1269
1270 return r;
1271 }
1272
1273#endif
1274
1275#endif
1276
1277/* ECB.H END */
1278
1279#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1280/* if your architecture doesn't need memory fences, e.g. because it is
1281 * single-cpu/core, or if you use libev in a project that doesn't use libev
1282 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1283 * libev, in which cases the memory fences become nops.
1284 * alternatively, you can remove this #error and link against libpthread,
1285 * which will then provide the memory fences.
1286 */
1287# error "memory fences not defined for your architecture, please report"
1288#endif
1289
1290#ifndef ECB_MEMORY_FENCE
1291# define ECB_MEMORY_FENCE do { } while (0)
1292# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1293# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1294#endif
1295
1296#define expect_false(cond) ecb_expect_false (cond)
1297#define expect_true(cond) ecb_expect_true (cond)
1298#define noinline ecb_noinline
1299
388#define inline_size static inline 1300#define inline_size ecb_inline
389 1301
390#if EV_MINIMAL 1302#if EV_FEATURE_CODE
1303# define inline_speed ecb_inline
1304#else
391# define inline_speed static noinline 1305# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif 1306#endif
395 1307
396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1308#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397 1309
398#if EV_MINPRI == EV_MAXPRI 1310#if EV_MINPRI == EV_MAXPRI
… …
411#define ev_active(w) ((W)(w))->active 1323#define ev_active(w) ((W)(w))->active
412#define ev_at(w) ((WT)(w))->at 1324#define ev_at(w) ((WT)(w))->at
413 1325
414#if EV_USE_REALTIME 1326#if EV_USE_REALTIME
415/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1327/* sig_atomic_t is used to avoid per-thread variables or locking but still */
416/* giving it a reasonably high chance of working on typical architetcures */ 1328/* giving it a reasonably high chance of working on typical architectures */
417static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1329static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
418#endif 1330#endif
419 1331
420#if EV_USE_MONOTONIC 1332#if EV_USE_MONOTONIC
421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
422#endif 1334#endif
423 1335
1336#ifndef EV_FD_TO_WIN32_HANDLE
1337# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1338#endif
1339#ifndef EV_WIN32_HANDLE_TO_FD
1340# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1341#endif
1342#ifndef EV_WIN32_CLOSE_FD
1343# define EV_WIN32_CLOSE_FD(fd) close (fd)
1344#endif
1345
424#ifdef _WIN32 1346#ifdef _WIN32
425# include "ev_win32.c" 1347# include "ev_win32.c"
426#endif 1348#endif
427 1349
428/*****************************************************************************/ 1350/*****************************************************************************/
429 1351
1352/* define a suitable floor function (only used by periodics atm) */
1353
1354#if EV_USE_FLOOR
1355# include <math.h>
1356# define ev_floor(v) floor (v)
1357#else
1358
1359#include <float.h>
1360
1361/* a floor() replacement function, should be independent of ev_tstamp type */
1362static ev_tstamp noinline
1363ev_floor (ev_tstamp v)
1364{
1365 /* the choice of shift factor is not terribly important */
1366#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1367 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1368#else
1369 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1370#endif
1371
1372 /* argument too large for an unsigned long? */
1373 if (expect_false (v >= shift))
1374 {
1375 ev_tstamp f;
1376
1377 if (v == v - 1.)
1378 return v; /* very large number */
1379
1380 f = shift * ev_floor (v * (1. / shift));
1381 return f + ev_floor (v - f);
1382 }
1383
1384 /* special treatment for negative args? */
1385 if (expect_false (v < 0.))
1386 {
1387 ev_tstamp f = -ev_floor (-v);
1388
1389 return f - (f == v ? 0 : 1);
1390 }
1391
1392 /* fits into an unsigned long */
1393 return (unsigned long)v;
1394}
1395
1396#endif
1397
1398/*****************************************************************************/
1399
1400#ifdef __linux
1401# include <sys/utsname.h>
1402#endif
1403
1404static unsigned int noinline ecb_cold
1405ev_linux_version (void)
1406{
1407#ifdef __linux
1408 unsigned int v = 0;
1409 struct utsname buf;
1410 int i;
1411 char *p = buf.release;
1412
1413 if (uname (&buf))
1414 return 0;
1415
1416 for (i = 3+1; --i; )
1417 {
1418 unsigned int c = 0;
1419
1420 for (;;)
1421 {
1422 if (*p >= '0' && *p <= '9')
1423 c = c * 10 + *p++ - '0';
1424 else
1425 {
1426 p += *p == '.';
1427 break;
1428 }
1429 }
1430
1431 v = (v << 8) | c;
1432 }
1433
1434 return v;
1435#else
1436 return 0;
1437#endif
1438}
1439
1440/*****************************************************************************/
1441
1442#if EV_AVOID_STDIO
1443static void noinline ecb_cold
1444ev_printerr (const char *msg)
1445{
1446 write (STDERR_FILENO, msg, strlen (msg));
1447}
1448#endif
1449
430static void (*syserr_cb)(const char *msg); 1450static void (*syserr_cb)(const char *msg) EV_THROW;
431 1451
432void 1452void ecb_cold
433ev_set_syserr_cb (void (*cb)(const char *msg)) 1453ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
434{ 1454{
435 syserr_cb = cb; 1455 syserr_cb = cb;
436} 1456}
437 1457
438static void noinline 1458static void noinline ecb_cold
439ev_syserr (const char *msg) 1459ev_syserr (const char *msg)
440{ 1460{
441 if (!msg) 1461 if (!msg)
442 msg = "(libev) system error"; 1462 msg = "(libev) system error";
443 1463
444 if (syserr_cb) 1464 if (syserr_cb)
445 syserr_cb (msg); 1465 syserr_cb (msg);
446 else 1466 else
447 { 1467 {
1468#if EV_AVOID_STDIO
1469 ev_printerr (msg);
1470 ev_printerr (": ");
1471 ev_printerr (strerror (errno));
1472 ev_printerr ("\n");
1473#else
448 perror (msg); 1474 perror (msg);
1475#endif
449 abort (); 1476 abort ();
450 } 1477 }
451} 1478}
452 1479
453static void * 1480static void *
454ev_realloc_emul (void *ptr, long size) 1481ev_realloc_emul (void *ptr, long size) EV_THROW
455{ 1482{
456 /* some systems, notably openbsd and darwin, fail to properly 1483 /* some systems, notably openbsd and darwin, fail to properly
457 * implement realloc (x, 0) (as required by both ansi c-98 and 1484 * implement realloc (x, 0) (as required by both ansi c-89 and
458 * the single unix specification, so work around them here. 1485 * the single unix specification, so work around them here.
1486 * recently, also (at least) fedora and debian started breaking it,
1487 * despite documenting it otherwise.
459 */ 1488 */
460 1489
461 if (size) 1490 if (size)
462 return realloc (ptr, size); 1491 return realloc (ptr, size);
463 1492
464 free (ptr); 1493 free (ptr);
465 return 0; 1494 return 0;
466} 1495}
467 1496
468static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1497static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
469 1498
470void 1499void ecb_cold
471ev_set_allocator (void *(*cb)(void *ptr, long size)) 1500ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
472{ 1501{
473 alloc = cb; 1502 alloc = cb;
474} 1503}
475 1504
476inline_speed void * 1505inline_speed void *
… …
478{ 1507{
479 ptr = alloc (ptr, size); 1508 ptr = alloc (ptr, size);
480 1509
481 if (!ptr && size) 1510 if (!ptr && size)
482 { 1511 {
1512#if EV_AVOID_STDIO
1513 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1514#else
483 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1515 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1516#endif
484 abort (); 1517 abort ();
485 } 1518 }
486 1519
487 return ptr; 1520 return ptr;
488} 1521}
… …
490#define ev_malloc(size) ev_realloc (0, (size)) 1523#define ev_malloc(size) ev_realloc (0, (size))
491#define ev_free(ptr) ev_realloc ((ptr), 0) 1524#define ev_free(ptr) ev_realloc ((ptr), 0)
492 1525
493/*****************************************************************************/ 1526/*****************************************************************************/
494 1527
1528/* set in reify when reification needed */
1529#define EV_ANFD_REIFY 1
1530
495/* file descriptor info structure */ 1531/* file descriptor info structure */
496typedef struct 1532typedef struct
497{ 1533{
498 WL head; 1534 WL head;
499 unsigned char events; /* the events watched for */ 1535 unsigned char events; /* the events watched for */
500 unsigned char reify; /* flag set when this ANFD needs reification */ 1536 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
501 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1537 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
502 unsigned char unused; 1538 unsigned char unused;
503#if EV_USE_EPOLL 1539#if EV_USE_EPOLL
504 unsigned int egen; /* generation counter to counter epoll bugs */ 1540 unsigned int egen; /* generation counter to counter epoll bugs */
505#endif 1541#endif
506#if EV_SELECT_IS_WINSOCKET 1542#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
507 SOCKET handle; 1543 SOCKET handle;
1544#endif
1545#if EV_USE_IOCP
1546 OVERLAPPED or, ow;
508#endif 1547#endif
509} ANFD; 1548} ANFD;
510 1549
511/* stores the pending event set for a given watcher */ 1550/* stores the pending event set for a given watcher */
512typedef struct 1551typedef struct
… …
554 #undef VAR 1593 #undef VAR
555 }; 1594 };
556 #include "ev_wrap.h" 1595 #include "ev_wrap.h"
557 1596
558 static struct ev_loop default_loop_struct; 1597 static struct ev_loop default_loop_struct;
559 struct ev_loop *ev_default_loop_ptr; 1598 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
560 1599
561#else 1600#else
562 1601
563 ev_tstamp ev_rt_now; 1602 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
564 #define VAR(name,decl) static decl; 1603 #define VAR(name,decl) static decl;
565 #include "ev_vars.h" 1604 #include "ev_vars.h"
566 #undef VAR 1605 #undef VAR
567 1606
568 static int ev_default_loop_ptr; 1607 static int ev_default_loop_ptr;
569 1608
570#endif 1609#endif
571 1610
1611#if EV_FEATURE_API
1612# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1613# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1614# define EV_INVOKE_PENDING invoke_cb (EV_A)
1615#else
1616# define EV_RELEASE_CB (void)0
1617# define EV_ACQUIRE_CB (void)0
1618# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1619#endif
1620
1621#define EVBREAK_RECURSE 0x80
1622
572/*****************************************************************************/ 1623/*****************************************************************************/
573 1624
574#ifndef EV_HAVE_EV_TIME 1625#ifndef EV_HAVE_EV_TIME
575ev_tstamp 1626ev_tstamp
576ev_time (void) 1627ev_time (void) EV_THROW
577{ 1628{
578#if EV_USE_REALTIME 1629#if EV_USE_REALTIME
579 if (expect_true (have_realtime)) 1630 if (expect_true (have_realtime))
580 { 1631 {
581 struct timespec ts; 1632 struct timespec ts;
… …
605 return ev_time (); 1656 return ev_time ();
606} 1657}
607 1658
608#if EV_MULTIPLICITY 1659#if EV_MULTIPLICITY
609ev_tstamp 1660ev_tstamp
610ev_now (EV_P) 1661ev_now (EV_P) EV_THROW
611{ 1662{
612 return ev_rt_now; 1663 return ev_rt_now;
613} 1664}
614#endif 1665#endif
615 1666
616void 1667void
617ev_sleep (ev_tstamp delay) 1668ev_sleep (ev_tstamp delay) EV_THROW
618{ 1669{
619 if (delay > 0.) 1670 if (delay > 0.)
620 { 1671 {
621#if EV_USE_NANOSLEEP 1672#if EV_USE_NANOSLEEP
622 struct timespec ts; 1673 struct timespec ts;
623 1674
624 ts.tv_sec = (time_t)delay; 1675 EV_TS_SET (ts, delay);
625 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
626
627 nanosleep (&ts, 0); 1676 nanosleep (&ts, 0);
628#elif defined(_WIN32) 1677#elif defined _WIN32
629 Sleep ((unsigned long)(delay * 1e3)); 1678 Sleep ((unsigned long)(delay * 1e3));
630#else 1679#else
631 struct timeval tv; 1680 struct timeval tv;
632 1681
633 tv.tv_sec = (time_t)delay;
634 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
635
636 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1682 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
637 /* somehting not guaranteed by newer posix versions, but guaranteed */ 1683 /* something not guaranteed by newer posix versions, but guaranteed */
638 /* by older ones */ 1684 /* by older ones */
1685 EV_TV_SET (tv, delay);
639 select (0, 0, 0, 0, &tv); 1686 select (0, 0, 0, 0, &tv);
640#endif 1687#endif
641 } 1688 }
642} 1689}
643 1690
644/*****************************************************************************/ 1691/*****************************************************************************/
645 1692
646#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1693#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
647 1694
648/* find a suitable new size for the given array, */ 1695/* find a suitable new size for the given array, */
649/* hopefully by rounding to a ncie-to-malloc size */ 1696/* hopefully by rounding to a nice-to-malloc size */
650inline_size int 1697inline_size int
651array_nextsize (int elem, int cur, int cnt) 1698array_nextsize (int elem, int cur, int cnt)
652{ 1699{
653 int ncur = cur + 1; 1700 int ncur = cur + 1;
654 1701
655 do 1702 do
656 ncur <<= 1; 1703 ncur <<= 1;
657 while (cnt > ncur); 1704 while (cnt > ncur);
658 1705
659 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1706 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
660 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1707 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
661 { 1708 {
662 ncur *= elem; 1709 ncur *= elem;
663 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1710 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
664 ncur = ncur - sizeof (void *) * 4; 1711 ncur = ncur - sizeof (void *) * 4;
… …
666 } 1713 }
667 1714
668 return ncur; 1715 return ncur;
669} 1716}
670 1717
671static noinline void * 1718static void * noinline ecb_cold
672array_realloc (int elem, void *base, int *cur, int cnt) 1719array_realloc (int elem, void *base, int *cur, int cnt)
673{ 1720{
674 *cur = array_nextsize (elem, *cur, cnt); 1721 *cur = array_nextsize (elem, *cur, cnt);
675 return ev_realloc (base, elem * *cur); 1722 return ev_realloc (base, elem * *cur);
676} 1723}
… …
679 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1726 memset ((void *)(base), 0, sizeof (*(base)) * (count))
680 1727
681#define array_needsize(type,base,cur,cnt,init) \ 1728#define array_needsize(type,base,cur,cnt,init) \
682 if (expect_false ((cnt) > (cur))) \ 1729 if (expect_false ((cnt) > (cur))) \
683 { \ 1730 { \
684 int ocur_ = (cur); \ 1731 int ecb_unused ocur_ = (cur); \
685 (base) = (type *)array_realloc \ 1732 (base) = (type *)array_realloc \
686 (sizeof (type), (base), &(cur), (cnt)); \ 1733 (sizeof (type), (base), &(cur), (cnt)); \
687 init ((base) + (ocur_), (cur) - ocur_); \ 1734 init ((base) + (ocur_), (cur) - ocur_); \
688 } 1735 }
689 1736
… …
707pendingcb (EV_P_ ev_prepare *w, int revents) 1754pendingcb (EV_P_ ev_prepare *w, int revents)
708{ 1755{
709} 1756}
710 1757
711void noinline 1758void noinline
712ev_feed_event (EV_P_ void *w, int revents) 1759ev_feed_event (EV_P_ void *w, int revents) EV_THROW
713{ 1760{
714 W w_ = (W)w; 1761 W w_ = (W)w;
715 int pri = ABSPRI (w_); 1762 int pri = ABSPRI (w_);
716 1763
717 if (expect_false (w_->pending)) 1764 if (expect_false (w_->pending))
… …
721 w_->pending = ++pendingcnt [pri]; 1768 w_->pending = ++pendingcnt [pri];
722 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1769 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
723 pendings [pri][w_->pending - 1].w = w_; 1770 pendings [pri][w_->pending - 1].w = w_;
724 pendings [pri][w_->pending - 1].events = revents; 1771 pendings [pri][w_->pending - 1].events = revents;
725 } 1772 }
1773
1774 pendingpri = NUMPRI - 1;
726} 1775}
727 1776
728inline_speed void 1777inline_speed void
729feed_reverse (EV_P_ W w) 1778feed_reverse (EV_P_ W w)
730{ 1779{
… …
750} 1799}
751 1800
752/*****************************************************************************/ 1801/*****************************************************************************/
753 1802
754inline_speed void 1803inline_speed void
755fd_event (EV_P_ int fd, int revents) 1804fd_event_nocheck (EV_P_ int fd, int revents)
756{ 1805{
757 ANFD *anfd = anfds + fd; 1806 ANFD *anfd = anfds + fd;
758 ev_io *w; 1807 ev_io *w;
759 1808
760 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1809 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
764 if (ev) 1813 if (ev)
765 ev_feed_event (EV_A_ (W)w, ev); 1814 ev_feed_event (EV_A_ (W)w, ev);
766 } 1815 }
767} 1816}
768 1817
1818/* do not submit kernel events for fds that have reify set */
1819/* because that means they changed while we were polling for new events */
1820inline_speed void
1821fd_event (EV_P_ int fd, int revents)
1822{
1823 ANFD *anfd = anfds + fd;
1824
1825 if (expect_true (!anfd->reify))
1826 fd_event_nocheck (EV_A_ fd, revents);
1827}
1828
769void 1829void
770ev_feed_fd_event (EV_P_ int fd, int revents) 1830ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
771{ 1831{
772 if (fd >= 0 && fd < anfdmax) 1832 if (fd >= 0 && fd < anfdmax)
773 fd_event (EV_A_ fd, revents); 1833 fd_event_nocheck (EV_A_ fd, revents);
774} 1834}
775 1835
776/* make sure the external fd watch events are in-sync */ 1836/* make sure the external fd watch events are in-sync */
777/* with the kernel/libev internal state */ 1837/* with the kernel/libev internal state */
778inline_size void 1838inline_size void
779fd_reify (EV_P) 1839fd_reify (EV_P)
780{ 1840{
781 int i; 1841 int i;
782 1842
1843#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1844 for (i = 0; i < fdchangecnt; ++i)
1845 {
1846 int fd = fdchanges [i];
1847 ANFD *anfd = anfds + fd;
1848
1849 if (anfd->reify & EV__IOFDSET && anfd->head)
1850 {
1851 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1852
1853 if (handle != anfd->handle)
1854 {
1855 unsigned long arg;
1856
1857 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1858
1859 /* handle changed, but fd didn't - we need to do it in two steps */
1860 backend_modify (EV_A_ fd, anfd->events, 0);
1861 anfd->events = 0;
1862 anfd->handle = handle;
1863 }
1864 }
1865 }
1866#endif
1867
783 for (i = 0; i < fdchangecnt; ++i) 1868 for (i = 0; i < fdchangecnt; ++i)
784 { 1869 {
785 int fd = fdchanges [i]; 1870 int fd = fdchanges [i];
786 ANFD *anfd = anfds + fd; 1871 ANFD *anfd = anfds + fd;
787 ev_io *w; 1872 ev_io *w;
788 1873
789 unsigned char events = 0; 1874 unsigned char o_events = anfd->events;
1875 unsigned char o_reify = anfd->reify;
790 1876
791 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1877 anfd->reify = 0;
792 events |= (unsigned char)w->events;
793 1878
794#if EV_SELECT_IS_WINSOCKET 1879 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
795 if (events)
796 { 1880 {
797 unsigned long arg; 1881 anfd->events = 0;
798 #ifdef EV_FD_TO_WIN32_HANDLE 1882
799 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1883 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
800 #else 1884 anfd->events |= (unsigned char)w->events;
801 anfd->handle = _get_osfhandle (fd); 1885
802 #endif 1886 if (o_events != anfd->events)
803 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1887 o_reify = EV__IOFDSET; /* actually |= */
804 } 1888 }
805#endif
806 1889
807 { 1890 if (o_reify & EV__IOFDSET)
808 unsigned char o_events = anfd->events;
809 unsigned char o_reify = anfd->reify;
810
811 anfd->reify = 0;
812 anfd->events = events;
813
814 if (o_events != events || o_reify & EV__IOFDSET)
815 backend_modify (EV_A_ fd, o_events, events); 1891 backend_modify (EV_A_ fd, o_events, anfd->events);
816 }
817 } 1892 }
818 1893
819 fdchangecnt = 0; 1894 fdchangecnt = 0;
820} 1895}
821 1896
… …
833 fdchanges [fdchangecnt - 1] = fd; 1908 fdchanges [fdchangecnt - 1] = fd;
834 } 1909 }
835} 1910}
836 1911
837/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1912/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
838inline_speed void 1913inline_speed void ecb_cold
839fd_kill (EV_P_ int fd) 1914fd_kill (EV_P_ int fd)
840{ 1915{
841 ev_io *w; 1916 ev_io *w;
842 1917
843 while ((w = (ev_io *)anfds [fd].head)) 1918 while ((w = (ev_io *)anfds [fd].head))
… …
845 ev_io_stop (EV_A_ w); 1920 ev_io_stop (EV_A_ w);
846 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1921 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
847 } 1922 }
848} 1923}
849 1924
850/* check whether the given fd is atcually valid, for error recovery */ 1925/* check whether the given fd is actually valid, for error recovery */
851inline_size int 1926inline_size int ecb_cold
852fd_valid (int fd) 1927fd_valid (int fd)
853{ 1928{
854#ifdef _WIN32 1929#ifdef _WIN32
855 return _get_osfhandle (fd) != -1; 1930 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
856#else 1931#else
857 return fcntl (fd, F_GETFD) != -1; 1932 return fcntl (fd, F_GETFD) != -1;
858#endif 1933#endif
859} 1934}
860 1935
861/* called on EBADF to verify fds */ 1936/* called on EBADF to verify fds */
862static void noinline 1937static void noinline ecb_cold
863fd_ebadf (EV_P) 1938fd_ebadf (EV_P)
864{ 1939{
865 int fd; 1940 int fd;
866 1941
867 for (fd = 0; fd < anfdmax; ++fd) 1942 for (fd = 0; fd < anfdmax; ++fd)
… …
869 if (!fd_valid (fd) && errno == EBADF) 1944 if (!fd_valid (fd) && errno == EBADF)
870 fd_kill (EV_A_ fd); 1945 fd_kill (EV_A_ fd);
871} 1946}
872 1947
873/* called on ENOMEM in select/poll to kill some fds and retry */ 1948/* called on ENOMEM in select/poll to kill some fds and retry */
874static void noinline 1949static void noinline ecb_cold
875fd_enomem (EV_P) 1950fd_enomem (EV_P)
876{ 1951{
877 int fd; 1952 int fd;
878 1953
879 for (fd = anfdmax; fd--; ) 1954 for (fd = anfdmax; fd--; )
880 if (anfds [fd].events) 1955 if (anfds [fd].events)
881 { 1956 {
882 fd_kill (EV_A_ fd); 1957 fd_kill (EV_A_ fd);
883 return; 1958 break;
884 } 1959 }
885} 1960}
886 1961
887/* usually called after fork if backend needs to re-arm all fds from scratch */ 1962/* usually called after fork if backend needs to re-arm all fds from scratch */
888static void noinline 1963static void noinline
… …
893 for (fd = 0; fd < anfdmax; ++fd) 1968 for (fd = 0; fd < anfdmax; ++fd)
894 if (anfds [fd].events) 1969 if (anfds [fd].events)
895 { 1970 {
896 anfds [fd].events = 0; 1971 anfds [fd].events = 0;
897 anfds [fd].emask = 0; 1972 anfds [fd].emask = 0;
898 fd_change (EV_A_ fd, EV__IOFDSET | 1); 1973 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
899 } 1974 }
900} 1975}
901 1976
1977/* used to prepare libev internal fd's */
1978/* this is not fork-safe */
1979inline_speed void
1980fd_intern (int fd)
1981{
1982#ifdef _WIN32
1983 unsigned long arg = 1;
1984 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1985#else
1986 fcntl (fd, F_SETFD, FD_CLOEXEC);
1987 fcntl (fd, F_SETFL, O_NONBLOCK);
1988#endif
1989}
1990
902/*****************************************************************************/ 1991/*****************************************************************************/
903 1992
904/* 1993/*
905 * the heap functions want a real array index. array index 0 uis guaranteed to not 1994 * the heap functions want a real array index. array index 0 is guaranteed to not
906 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1995 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
907 * the branching factor of the d-tree. 1996 * the branching factor of the d-tree.
908 */ 1997 */
909 1998
910/* 1999/*
… …
978 2067
979 for (;;) 2068 for (;;)
980 { 2069 {
981 int c = k << 1; 2070 int c = k << 1;
982 2071
983 if (c > N + HEAP0 - 1) 2072 if (c >= N + HEAP0)
984 break; 2073 break;
985 2074
986 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2075 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
987 ? 1 : 0; 2076 ? 1 : 0;
988 2077
… …
1024 2113
1025/* move an element suitably so it is in a correct place */ 2114/* move an element suitably so it is in a correct place */
1026inline_size void 2115inline_size void
1027adjustheap (ANHE *heap, int N, int k) 2116adjustheap (ANHE *heap, int N, int k)
1028{ 2117{
1029 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2118 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1030 upheap (heap, k); 2119 upheap (heap, k);
1031 else 2120 else
1032 downheap (heap, N, k); 2121 downheap (heap, N, k);
1033} 2122}
1034 2123
… …
1047/*****************************************************************************/ 2136/*****************************************************************************/
1048 2137
1049/* associate signal watchers to a signal signal */ 2138/* associate signal watchers to a signal signal */
1050typedef struct 2139typedef struct
1051{ 2140{
2141 EV_ATOMIC_T pending;
2142#if EV_MULTIPLICITY
2143 EV_P;
2144#endif
1052 WL head; 2145 WL head;
1053 EV_ATOMIC_T gotsig;
1054} ANSIG; 2146} ANSIG;
1055 2147
1056static ANSIG *signals; 2148static ANSIG signals [EV_NSIG - 1];
1057static int signalmax;
1058
1059static EV_ATOMIC_T gotsig;
1060 2149
1061/*****************************************************************************/ 2150/*****************************************************************************/
1062 2151
1063/* used to prepare libev internal fd's */ 2152#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1064/* this is not fork-safe */ 2153
2154static void noinline ecb_cold
2155evpipe_init (EV_P)
2156{
2157 if (!ev_is_active (&pipe_w))
2158 {
2159 int fds [2];
2160
2161# if EV_USE_EVENTFD
2162 fds [0] = -1;
2163 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2164 if (fds [1] < 0 && errno == EINVAL)
2165 fds [1] = eventfd (0, 0);
2166
2167 if (fds [1] < 0)
2168# endif
2169 {
2170 while (pipe (fds))
2171 ev_syserr ("(libev) error creating signal/async pipe");
2172
2173 fd_intern (fds [0]);
2174 }
2175
2176 evpipe [0] = fds [0];
2177
2178 if (evpipe [1] < 0)
2179 evpipe [1] = fds [1]; /* first call, set write fd */
2180 else
2181 {
2182 /* on subsequent calls, do not change evpipe [1] */
2183 /* so that evpipe_write can always rely on its value. */
2184 /* this branch does not do anything sensible on windows, */
2185 /* so must not be executed on windows */
2186
2187 dup2 (fds [1], evpipe [1]);
2188 close (fds [1]);
2189 }
2190
2191 fd_intern (evpipe [1]);
2192
2193 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2194 ev_io_start (EV_A_ &pipe_w);
2195 ev_unref (EV_A); /* watcher should not keep loop alive */
2196 }
2197}
2198
1065inline_speed void 2199inline_speed void
1066fd_intern (int fd) 2200evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1067{ 2201{
1068#ifdef _WIN32 2202 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1069 unsigned long arg = 1;
1070 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1071#else
1072 fcntl (fd, F_SETFD, FD_CLOEXEC);
1073 fcntl (fd, F_SETFL, O_NONBLOCK);
1074#endif
1075}
1076 2203
1077static void noinline 2204 if (expect_true (*flag))
1078evpipe_init (EV_P) 2205 return;
1079{ 2206
1080 if (!ev_is_active (&pipe_w)) 2207 *flag = 1;
2208 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2209
2210 pipe_write_skipped = 1;
2211
2212 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2213
2214 if (pipe_write_wanted)
1081 { 2215 {
2216 int old_errno;
2217
2218 pipe_write_skipped = 0;
2219 ECB_MEMORY_FENCE_RELEASE;
2220
2221 old_errno = errno; /* save errno because write will clobber it */
2222
1082#if EV_USE_EVENTFD 2223#if EV_USE_EVENTFD
1083 if ((evfd = eventfd (0, 0)) >= 0) 2224 if (evpipe [0] < 0)
1084 { 2225 {
1085 evpipe [0] = -1; 2226 uint64_t counter = 1;
1086 fd_intern (evfd); 2227 write (evpipe [1], &counter, sizeof (uint64_t));
1087 ev_io_set (&pipe_w, evfd, EV_READ);
1088 } 2228 }
1089 else 2229 else
1090#endif 2230#endif
1091 { 2231 {
1092 while (pipe (evpipe)) 2232#ifdef _WIN32
1093 ev_syserr ("(libev) error creating signal/async pipe"); 2233 WSABUF buf;
1094 2234 DWORD sent;
1095 fd_intern (evpipe [0]); 2235 buf.buf = &buf;
1096 fd_intern (evpipe [1]); 2236 buf.len = 1;
1097 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2237 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2238#else
2239 write (evpipe [1], &(evpipe [1]), 1);
2240#endif
1098 } 2241 }
1099
1100 ev_io_start (EV_A_ &pipe_w);
1101 ev_unref (EV_A); /* watcher should not keep loop alive */
1102 }
1103}
1104
1105inline_size void
1106evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1107{
1108 if (!*flag)
1109 {
1110 int old_errno = errno; /* save errno because write might clobber it */
1111
1112 *flag = 1;
1113
1114#if EV_USE_EVENTFD
1115 if (evfd >= 0)
1116 {
1117 uint64_t counter = 1;
1118 write (evfd, &counter, sizeof (uint64_t));
1119 }
1120 else
1121#endif
1122 write (evpipe [1], &old_errno, 1);
1123 2242
1124 errno = old_errno; 2243 errno = old_errno;
1125 } 2244 }
1126} 2245}
1127 2246
1128/* called whenever the libev signal pipe */ 2247/* called whenever the libev signal pipe */
1129/* got some events (signal, async) */ 2248/* got some events (signal, async) */
1130static void 2249static void
1131pipecb (EV_P_ ev_io *iow, int revents) 2250pipecb (EV_P_ ev_io *iow, int revents)
1132{ 2251{
2252 int i;
2253
2254 if (revents & EV_READ)
2255 {
1133#if EV_USE_EVENTFD 2256#if EV_USE_EVENTFD
1134 if (evfd >= 0) 2257 if (evpipe [0] < 0)
1135 { 2258 {
1136 uint64_t counter; 2259 uint64_t counter;
1137 read (evfd, &counter, sizeof (uint64_t)); 2260 read (evpipe [1], &counter, sizeof (uint64_t));
1138 } 2261 }
1139 else 2262 else
1140#endif 2263#endif
1141 { 2264 {
1142 char dummy; 2265 char dummy[4];
2266#ifdef _WIN32
2267 WSABUF buf;
2268 DWORD recvd;
2269 DWORD flags = 0;
2270 buf.buf = dummy;
2271 buf.len = sizeof (dummy);
2272 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2273#else
1143 read (evpipe [0], &dummy, 1); 2274 read (evpipe [0], &dummy, sizeof (dummy));
2275#endif
2276 }
2277 }
2278
2279 pipe_write_skipped = 0;
2280
2281 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2282
2283#if EV_SIGNAL_ENABLE
2284 if (sig_pending)
1144 } 2285 {
2286 sig_pending = 0;
1145 2287
1146 if (gotsig && ev_is_default_loop (EV_A)) 2288 ECB_MEMORY_FENCE;
1147 {
1148 int signum;
1149 gotsig = 0;
1150 2289
1151 for (signum = signalmax; signum--; ) 2290 for (i = EV_NSIG - 1; i--; )
1152 if (signals [signum].gotsig) 2291 if (expect_false (signals [i].pending))
1153 ev_feed_signal_event (EV_A_ signum + 1); 2292 ev_feed_signal_event (EV_A_ i + 1);
1154 } 2293 }
2294#endif
1155 2295
1156#if EV_ASYNC_ENABLE 2296#if EV_ASYNC_ENABLE
1157 if (gotasync) 2297 if (async_pending)
1158 { 2298 {
1159 int i; 2299 async_pending = 0;
1160 gotasync = 0; 2300
2301 ECB_MEMORY_FENCE;
1161 2302
1162 for (i = asynccnt; i--; ) 2303 for (i = asynccnt; i--; )
1163 if (asyncs [i]->sent) 2304 if (asyncs [i]->sent)
1164 { 2305 {
1165 asyncs [i]->sent = 0; 2306 asyncs [i]->sent = 0;
2307 ECB_MEMORY_FENCE_RELEASE;
1166 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2308 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1167 } 2309 }
1168 } 2310 }
1169#endif 2311#endif
1170} 2312}
1171 2313
1172/*****************************************************************************/ 2314/*****************************************************************************/
1173 2315
2316void
2317ev_feed_signal (int signum) EV_THROW
2318{
2319#if EV_MULTIPLICITY
2320 EV_P;
2321 ECB_MEMORY_FENCE_ACQUIRE;
2322 EV_A = signals [signum - 1].loop;
2323
2324 if (!EV_A)
2325 return;
2326#endif
2327
2328 signals [signum - 1].pending = 1;
2329 evpipe_write (EV_A_ &sig_pending);
2330}
2331
1174static void 2332static void
1175ev_sighandler (int signum) 2333ev_sighandler (int signum)
1176{ 2334{
2335#ifdef _WIN32
2336 signal (signum, ev_sighandler);
2337#endif
2338
2339 ev_feed_signal (signum);
2340}
2341
2342void noinline
2343ev_feed_signal_event (EV_P_ int signum) EV_THROW
2344{
2345 WL w;
2346
2347 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2348 return;
2349
2350 --signum;
2351
1177#if EV_MULTIPLICITY 2352#if EV_MULTIPLICITY
1178 struct ev_loop *loop = &default_loop_struct; 2353 /* it is permissible to try to feed a signal to the wrong loop */
1179#endif 2354 /* or, likely more useful, feeding a signal nobody is waiting for */
1180 2355
1181#if _WIN32 2356 if (expect_false (signals [signum].loop != EV_A))
1182 signal (signum, ev_sighandler);
1183#endif
1184
1185 signals [signum - 1].gotsig = 1;
1186 evpipe_write (EV_A_ &gotsig);
1187}
1188
1189void noinline
1190ev_feed_signal_event (EV_P_ int signum)
1191{
1192 WL w;
1193
1194#if EV_MULTIPLICITY
1195 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1196#endif
1197
1198 --signum;
1199
1200 if (signum < 0 || signum >= signalmax)
1201 return; 2357 return;
2358#endif
1202 2359
1203 signals [signum].gotsig = 0; 2360 signals [signum].pending = 0;
2361 ECB_MEMORY_FENCE_RELEASE;
1204 2362
1205 for (w = signals [signum].head; w; w = w->next) 2363 for (w = signals [signum].head; w; w = w->next)
1206 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2364 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1207} 2365}
1208 2366
2367#if EV_USE_SIGNALFD
2368static void
2369sigfdcb (EV_P_ ev_io *iow, int revents)
2370{
2371 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2372
2373 for (;;)
2374 {
2375 ssize_t res = read (sigfd, si, sizeof (si));
2376
2377 /* not ISO-C, as res might be -1, but works with SuS */
2378 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2379 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2380
2381 if (res < (ssize_t)sizeof (si))
2382 break;
2383 }
2384}
2385#endif
2386
2387#endif
2388
1209/*****************************************************************************/ 2389/*****************************************************************************/
1210 2390
2391#if EV_CHILD_ENABLE
1211static WL childs [EV_PID_HASHSIZE]; 2392static WL childs [EV_PID_HASHSIZE];
1212
1213#ifndef _WIN32
1214 2393
1215static ev_signal childev; 2394static ev_signal childev;
1216 2395
1217#ifndef WIFCONTINUED 2396#ifndef WIFCONTINUED
1218# define WIFCONTINUED(status) 0 2397# define WIFCONTINUED(status) 0
… …
1223child_reap (EV_P_ int chain, int pid, int status) 2402child_reap (EV_P_ int chain, int pid, int status)
1224{ 2403{
1225 ev_child *w; 2404 ev_child *w;
1226 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2405 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1227 2406
1228 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2407 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1229 { 2408 {
1230 if ((w->pid == pid || !w->pid) 2409 if ((w->pid == pid || !w->pid)
1231 && (!traced || (w->flags & 1))) 2410 && (!traced || (w->flags & 1)))
1232 { 2411 {
1233 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2412 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1258 /* make sure we are called again until all children have been reaped */ 2437 /* make sure we are called again until all children have been reaped */
1259 /* we need to do it this way so that the callback gets called before we continue */ 2438 /* we need to do it this way so that the callback gets called before we continue */
1260 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2439 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1261 2440
1262 child_reap (EV_A_ pid, pid, status); 2441 child_reap (EV_A_ pid, pid, status);
1263 if (EV_PID_HASHSIZE > 1) 2442 if ((EV_PID_HASHSIZE) > 1)
1264 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2443 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1265} 2444}
1266 2445
1267#endif 2446#endif
1268 2447
1269/*****************************************************************************/ 2448/*****************************************************************************/
1270 2449
2450#if EV_USE_IOCP
2451# include "ev_iocp.c"
2452#endif
1271#if EV_USE_PORT 2453#if EV_USE_PORT
1272# include "ev_port.c" 2454# include "ev_port.c"
1273#endif 2455#endif
1274#if EV_USE_KQUEUE 2456#if EV_USE_KQUEUE
1275# include "ev_kqueue.c" 2457# include "ev_kqueue.c"
… …
1282#endif 2464#endif
1283#if EV_USE_SELECT 2465#if EV_USE_SELECT
1284# include "ev_select.c" 2466# include "ev_select.c"
1285#endif 2467#endif
1286 2468
1287int 2469int ecb_cold
1288ev_version_major (void) 2470ev_version_major (void) EV_THROW
1289{ 2471{
1290 return EV_VERSION_MAJOR; 2472 return EV_VERSION_MAJOR;
1291} 2473}
1292 2474
1293int 2475int ecb_cold
1294ev_version_minor (void) 2476ev_version_minor (void) EV_THROW
1295{ 2477{
1296 return EV_VERSION_MINOR; 2478 return EV_VERSION_MINOR;
1297} 2479}
1298 2480
1299/* return true if we are running with elevated privileges and should ignore env variables */ 2481/* return true if we are running with elevated privileges and should ignore env variables */
1300int inline_size 2482int inline_size ecb_cold
1301enable_secure (void) 2483enable_secure (void)
1302{ 2484{
1303#ifdef _WIN32 2485#ifdef _WIN32
1304 return 0; 2486 return 0;
1305#else 2487#else
1306 return getuid () != geteuid () 2488 return getuid () != geteuid ()
1307 || getgid () != getegid (); 2489 || getgid () != getegid ();
1308#endif 2490#endif
1309} 2491}
1310 2492
1311unsigned int 2493unsigned int ecb_cold
1312ev_supported_backends (void) 2494ev_supported_backends (void) EV_THROW
1313{ 2495{
1314 unsigned int flags = 0; 2496 unsigned int flags = 0;
1315 2497
1316 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1317 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1320 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1321 2503
1322 return flags; 2504 return flags;
1323} 2505}
1324 2506
1325unsigned int 2507unsigned int ecb_cold
1326ev_recommended_backends (void) 2508ev_recommended_backends (void) EV_THROW
1327{ 2509{
1328 unsigned int flags = ev_supported_backends (); 2510 unsigned int flags = ev_supported_backends ();
1329 2511
1330#ifndef __NetBSD__ 2512#ifndef __NetBSD__
1331 /* kqueue is borked on everything but netbsd apparently */ 2513 /* kqueue is borked on everything but netbsd apparently */
… …
1335#ifdef __APPLE__ 2517#ifdef __APPLE__
1336 /* only select works correctly on that "unix-certified" platform */ 2518 /* only select works correctly on that "unix-certified" platform */
1337 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2519 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1338 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2520 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1339#endif 2521#endif
2522#ifdef __FreeBSD__
2523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2524#endif
1340 2525
1341 return flags; 2526 return flags;
1342} 2527}
1343 2528
2529unsigned int ecb_cold
2530ev_embeddable_backends (void) EV_THROW
2531{
2532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2533
2534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2535 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2536 flags &= ~EVBACKEND_EPOLL;
2537
2538 return flags;
2539}
2540
1344unsigned int 2541unsigned int
1345ev_embeddable_backends (void) 2542ev_backend (EV_P) EV_THROW
1346{ 2543{
1347 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2544 return backend;
1348
1349 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1350 /* please fix it and tell me how to detect the fix */
1351 flags &= ~EVBACKEND_EPOLL;
1352
1353 return flags;
1354} 2545}
1355 2546
2547#if EV_FEATURE_API
1356unsigned int 2548unsigned int
1357ev_backend (EV_P) 2549ev_iteration (EV_P) EV_THROW
1358{ 2550{
1359 return backend; 2551 return loop_count;
1360} 2552}
1361 2553
1362unsigned int 2554unsigned int
1363ev_loop_count (EV_P) 2555ev_depth (EV_P) EV_THROW
1364{
1365 return loop_count;
1366}
1367
1368unsigned int
1369ev_loop_depth (EV_P)
1370{ 2556{
1371 return loop_depth; 2557 return loop_depth;
1372} 2558}
1373 2559
1374void 2560void
1375ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1376{ 2562{
1377 io_blocktime = interval; 2563 io_blocktime = interval;
1378} 2564}
1379 2565
1380void 2566void
1381ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1382{ 2568{
1383 timeout_blocktime = interval; 2569 timeout_blocktime = interval;
1384} 2570}
1385 2571
2572void
2573ev_set_userdata (EV_P_ void *data) EV_THROW
2574{
2575 userdata = data;
2576}
2577
2578void *
2579ev_userdata (EV_P) EV_THROW
2580{
2581 return userdata;
2582}
2583
2584void
2585ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2586{
2587 invoke_cb = invoke_pending_cb;
2588}
2589
2590void
2591ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
2592{
2593 release_cb = release;
2594 acquire_cb = acquire;
2595}
2596#endif
2597
1386/* initialise a loop structure, must be zero-initialised */ 2598/* initialise a loop structure, must be zero-initialised */
1387static void noinline 2599static void noinline ecb_cold
1388loop_init (EV_P_ unsigned int flags) 2600loop_init (EV_P_ unsigned int flags) EV_THROW
1389{ 2601{
1390 if (!backend) 2602 if (!backend)
1391 { 2603 {
2604 origflags = flags;
2605
1392#if EV_USE_REALTIME 2606#if EV_USE_REALTIME
1393 if (!have_realtime) 2607 if (!have_realtime)
1394 { 2608 {
1395 struct timespec ts; 2609 struct timespec ts;
1396 2610
… …
1407 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2621 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1408 have_monotonic = 1; 2622 have_monotonic = 1;
1409 } 2623 }
1410#endif 2624#endif
1411 2625
1412 ev_rt_now = ev_time ();
1413 mn_now = get_clock ();
1414 now_floor = mn_now;
1415 rtmn_diff = ev_rt_now - mn_now;
1416
1417 io_blocktime = 0.;
1418 timeout_blocktime = 0.;
1419 backend = 0;
1420 backend_fd = -1;
1421 gotasync = 0;
1422#if EV_USE_INOTIFY
1423 fs_fd = -2;
1424#endif
1425
1426 /* pid check not overridable via env */ 2626 /* pid check not overridable via env */
1427#ifndef _WIN32 2627#ifndef _WIN32
1428 if (flags & EVFLAG_FORKCHECK) 2628 if (flags & EVFLAG_FORKCHECK)
1429 curpid = getpid (); 2629 curpid = getpid ();
1430#endif 2630#endif
… …
1432 if (!(flags & EVFLAG_NOENV) 2632 if (!(flags & EVFLAG_NOENV)
1433 && !enable_secure () 2633 && !enable_secure ()
1434 && getenv ("LIBEV_FLAGS")) 2634 && getenv ("LIBEV_FLAGS"))
1435 flags = atoi (getenv ("LIBEV_FLAGS")); 2635 flags = atoi (getenv ("LIBEV_FLAGS"));
1436 2636
1437 if (!(flags & 0x0000ffffU)) 2637 ev_rt_now = ev_time ();
2638 mn_now = get_clock ();
2639 now_floor = mn_now;
2640 rtmn_diff = ev_rt_now - mn_now;
2641#if EV_FEATURE_API
2642 invoke_cb = ev_invoke_pending;
2643#endif
2644
2645 io_blocktime = 0.;
2646 timeout_blocktime = 0.;
2647 backend = 0;
2648 backend_fd = -1;
2649 sig_pending = 0;
2650#if EV_ASYNC_ENABLE
2651 async_pending = 0;
2652#endif
2653 pipe_write_skipped = 0;
2654 pipe_write_wanted = 0;
2655 evpipe [0] = -1;
2656 evpipe [1] = -1;
2657#if EV_USE_INOTIFY
2658 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2659#endif
2660#if EV_USE_SIGNALFD
2661 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2662#endif
2663
2664 if (!(flags & EVBACKEND_MASK))
1438 flags |= ev_recommended_backends (); 2665 flags |= ev_recommended_backends ();
1439 2666
2667#if EV_USE_IOCP
2668 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2669#endif
1440#if EV_USE_PORT 2670#if EV_USE_PORT
1441 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2671 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1442#endif 2672#endif
1443#if EV_USE_KQUEUE 2673#if EV_USE_KQUEUE
1444 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2674 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1453 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2683 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1454#endif 2684#endif
1455 2685
1456 ev_prepare_init (&pending_w, pendingcb); 2686 ev_prepare_init (&pending_w, pendingcb);
1457 2687
2688#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1458 ev_init (&pipe_w, pipecb); 2689 ev_init (&pipe_w, pipecb);
1459 ev_set_priority (&pipe_w, EV_MAXPRI); 2690 ev_set_priority (&pipe_w, EV_MAXPRI);
2691#endif
1460 } 2692 }
1461} 2693}
1462 2694
1463/* free up a loop structure */ 2695/* free up a loop structure */
1464static void noinline 2696void ecb_cold
1465loop_destroy (EV_P) 2697ev_loop_destroy (EV_P)
1466{ 2698{
1467 int i; 2699 int i;
1468 2700
2701#if EV_MULTIPLICITY
2702 /* mimic free (0) */
2703 if (!EV_A)
2704 return;
2705#endif
2706
2707#if EV_CLEANUP_ENABLE
2708 /* queue cleanup watchers (and execute them) */
2709 if (expect_false (cleanupcnt))
2710 {
2711 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2712 EV_INVOKE_PENDING;
2713 }
2714#endif
2715
2716#if EV_CHILD_ENABLE
2717 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2718 {
2719 ev_ref (EV_A); /* child watcher */
2720 ev_signal_stop (EV_A_ &childev);
2721 }
2722#endif
2723
1469 if (ev_is_active (&pipe_w)) 2724 if (ev_is_active (&pipe_w))
1470 { 2725 {
1471 ev_ref (EV_A); /* signal watcher */ 2726 /*ev_ref (EV_A);*/
1472 ev_io_stop (EV_A_ &pipe_w); 2727 /*ev_io_stop (EV_A_ &pipe_w);*/
1473 2728
2729 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2730 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2731 }
2732
1474#if EV_USE_EVENTFD 2733#if EV_USE_SIGNALFD
1475 if (evfd >= 0) 2734 if (ev_is_active (&sigfd_w))
1476 close (evfd); 2735 close (sigfd);
1477#endif 2736#endif
1478
1479 if (evpipe [0] >= 0)
1480 {
1481 close (evpipe [0]);
1482 close (evpipe [1]);
1483 }
1484 }
1485 2737
1486#if EV_USE_INOTIFY 2738#if EV_USE_INOTIFY
1487 if (fs_fd >= 0) 2739 if (fs_fd >= 0)
1488 close (fs_fd); 2740 close (fs_fd);
1489#endif 2741#endif
1490 2742
1491 if (backend_fd >= 0) 2743 if (backend_fd >= 0)
1492 close (backend_fd); 2744 close (backend_fd);
1493 2745
2746#if EV_USE_IOCP
2747 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2748#endif
1494#if EV_USE_PORT 2749#if EV_USE_PORT
1495 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2750 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1496#endif 2751#endif
1497#if EV_USE_KQUEUE 2752#if EV_USE_KQUEUE
1498 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2753 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1513#if EV_IDLE_ENABLE 2768#if EV_IDLE_ENABLE
1514 array_free (idle, [i]); 2769 array_free (idle, [i]);
1515#endif 2770#endif
1516 } 2771 }
1517 2772
1518 ev_free (anfds); anfdmax = 0; 2773 ev_free (anfds); anfds = 0; anfdmax = 0;
1519 2774
1520 /* have to use the microsoft-never-gets-it-right macro */ 2775 /* have to use the microsoft-never-gets-it-right macro */
1521 array_free (rfeed, EMPTY); 2776 array_free (rfeed, EMPTY);
1522 array_free (fdchange, EMPTY); 2777 array_free (fdchange, EMPTY);
1523 array_free (timer, EMPTY); 2778 array_free (timer, EMPTY);
… …
1525 array_free (periodic, EMPTY); 2780 array_free (periodic, EMPTY);
1526#endif 2781#endif
1527#if EV_FORK_ENABLE 2782#if EV_FORK_ENABLE
1528 array_free (fork, EMPTY); 2783 array_free (fork, EMPTY);
1529#endif 2784#endif
2785#if EV_CLEANUP_ENABLE
2786 array_free (cleanup, EMPTY);
2787#endif
1530 array_free (prepare, EMPTY); 2788 array_free (prepare, EMPTY);
1531 array_free (check, EMPTY); 2789 array_free (check, EMPTY);
1532#if EV_ASYNC_ENABLE 2790#if EV_ASYNC_ENABLE
1533 array_free (async, EMPTY); 2791 array_free (async, EMPTY);
1534#endif 2792#endif
1535 2793
1536 backend = 0; 2794 backend = 0;
2795
2796#if EV_MULTIPLICITY
2797 if (ev_is_default_loop (EV_A))
2798#endif
2799 ev_default_loop_ptr = 0;
2800#if EV_MULTIPLICITY
2801 else
2802 ev_free (EV_A);
2803#endif
1537} 2804}
1538 2805
1539#if EV_USE_INOTIFY 2806#if EV_USE_INOTIFY
1540inline_size void infy_fork (EV_P); 2807inline_size void infy_fork (EV_P);
1541#endif 2808#endif
… …
1554#endif 2821#endif
1555#if EV_USE_INOTIFY 2822#if EV_USE_INOTIFY
1556 infy_fork (EV_A); 2823 infy_fork (EV_A);
1557#endif 2824#endif
1558 2825
2826#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1559 if (ev_is_active (&pipe_w)) 2827 if (ev_is_active (&pipe_w))
1560 { 2828 {
1561 /* this "locks" the handlers against writing to the pipe */ 2829 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1562 /* while we modify the fd vars */
1563 gotsig = 1;
1564#if EV_ASYNC_ENABLE
1565 gotasync = 1;
1566#endif
1567 2830
1568 ev_ref (EV_A); 2831 ev_ref (EV_A);
1569 ev_io_stop (EV_A_ &pipe_w); 2832 ev_io_stop (EV_A_ &pipe_w);
1570 2833
1571#if EV_USE_EVENTFD
1572 if (evfd >= 0)
1573 close (evfd);
1574#endif
1575
1576 if (evpipe [0] >= 0) 2834 if (evpipe [0] >= 0)
1577 { 2835 EV_WIN32_CLOSE_FD (evpipe [0]);
1578 close (evpipe [0]);
1579 close (evpipe [1]);
1580 }
1581 2836
1582 evpipe_init (EV_A); 2837 evpipe_init (EV_A);
1583 /* now iterate over everything, in case we missed something */ 2838 /* iterate over everything, in case we missed something before */
1584 pipecb (EV_A_ &pipe_w, EV_READ); 2839 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1585 } 2840 }
2841#endif
1586 2842
1587 postfork = 0; 2843 postfork = 0;
1588} 2844}
1589 2845
1590#if EV_MULTIPLICITY 2846#if EV_MULTIPLICITY
1591 2847
1592struct ev_loop * 2848struct ev_loop * ecb_cold
1593ev_loop_new (unsigned int flags) 2849ev_loop_new (unsigned int flags) EV_THROW
1594{ 2850{
1595 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2851 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1596 2852
1597 memset (loop, 0, sizeof (struct ev_loop)); 2853 memset (EV_A, 0, sizeof (struct ev_loop));
1598
1599 loop_init (EV_A_ flags); 2854 loop_init (EV_A_ flags);
1600 2855
1601 if (ev_backend (EV_A)) 2856 if (ev_backend (EV_A))
1602 return loop; 2857 return EV_A;
1603 2858
2859 ev_free (EV_A);
1604 return 0; 2860 return 0;
1605} 2861}
1606 2862
1607void 2863#endif /* multiplicity */
1608ev_loop_destroy (EV_P)
1609{
1610 loop_destroy (EV_A);
1611 ev_free (loop);
1612}
1613
1614void
1615ev_loop_fork (EV_P)
1616{
1617 postfork = 1; /* must be in line with ev_default_fork */
1618}
1619 2864
1620#if EV_VERIFY 2865#if EV_VERIFY
1621static void noinline 2866static void noinline ecb_cold
1622verify_watcher (EV_P_ W w) 2867verify_watcher (EV_P_ W w)
1623{ 2868{
1624 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2869 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1625 2870
1626 if (w->pending) 2871 if (w->pending)
1627 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2872 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1628} 2873}
1629 2874
1630static void noinline 2875static void noinline ecb_cold
1631verify_heap (EV_P_ ANHE *heap, int N) 2876verify_heap (EV_P_ ANHE *heap, int N)
1632{ 2877{
1633 int i; 2878 int i;
1634 2879
1635 for (i = HEAP0; i < N + HEAP0; ++i) 2880 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1640 2885
1641 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2886 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1642 } 2887 }
1643} 2888}
1644 2889
1645static void noinline 2890static void noinline ecb_cold
1646array_verify (EV_P_ W *ws, int cnt) 2891array_verify (EV_P_ W *ws, int cnt)
1647{ 2892{
1648 while (cnt--) 2893 while (cnt--)
1649 { 2894 {
1650 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2895 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1651 verify_watcher (EV_A_ ws [cnt]); 2896 verify_watcher (EV_A_ ws [cnt]);
1652 } 2897 }
1653} 2898}
1654#endif 2899#endif
1655 2900
1656void 2901#if EV_FEATURE_API
1657ev_loop_verify (EV_P) 2902void ecb_cold
2903ev_verify (EV_P) EV_THROW
1658{ 2904{
1659#if EV_VERIFY 2905#if EV_VERIFY
1660 int i; 2906 int i;
1661 WL w; 2907 WL w, w2;
1662 2908
1663 assert (activecnt >= -1); 2909 assert (activecnt >= -1);
1664 2910
1665 assert (fdchangemax >= fdchangecnt); 2911 assert (fdchangemax >= fdchangecnt);
1666 for (i = 0; i < fdchangecnt; ++i) 2912 for (i = 0; i < fdchangecnt; ++i)
1667 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2913 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1668 2914
1669 assert (anfdmax >= 0); 2915 assert (anfdmax >= 0);
1670 for (i = 0; i < anfdmax; ++i) 2916 for (i = 0; i < anfdmax; ++i)
2917 {
2918 int j = 0;
2919
1671 for (w = anfds [i].head; w; w = w->next) 2920 for (w = w2 = anfds [i].head; w; w = w->next)
1672 { 2921 {
1673 verify_watcher (EV_A_ (W)w); 2922 verify_watcher (EV_A_ (W)w);
2923
2924 if (j++ & 1)
2925 {
2926 assert (("libev: io watcher list contains a loop", w != w2));
2927 w2 = w2->next;
2928 }
2929
1674 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2930 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1675 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2931 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1676 } 2932 }
2933 }
1677 2934
1678 assert (timermax >= timercnt); 2935 assert (timermax >= timercnt);
1679 verify_heap (EV_A_ timers, timercnt); 2936 verify_heap (EV_A_ timers, timercnt);
1680 2937
1681#if EV_PERIODIC_ENABLE 2938#if EV_PERIODIC_ENABLE
… …
1696#if EV_FORK_ENABLE 2953#if EV_FORK_ENABLE
1697 assert (forkmax >= forkcnt); 2954 assert (forkmax >= forkcnt);
1698 array_verify (EV_A_ (W *)forks, forkcnt); 2955 array_verify (EV_A_ (W *)forks, forkcnt);
1699#endif 2956#endif
1700 2957
2958#if EV_CLEANUP_ENABLE
2959 assert (cleanupmax >= cleanupcnt);
2960 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2961#endif
2962
1701#if EV_ASYNC_ENABLE 2963#if EV_ASYNC_ENABLE
1702 assert (asyncmax >= asynccnt); 2964 assert (asyncmax >= asynccnt);
1703 array_verify (EV_A_ (W *)asyncs, asynccnt); 2965 array_verify (EV_A_ (W *)asyncs, asynccnt);
1704#endif 2966#endif
1705 2967
2968#if EV_PREPARE_ENABLE
1706 assert (preparemax >= preparecnt); 2969 assert (preparemax >= preparecnt);
1707 array_verify (EV_A_ (W *)prepares, preparecnt); 2970 array_verify (EV_A_ (W *)prepares, preparecnt);
2971#endif
1708 2972
2973#if EV_CHECK_ENABLE
1709 assert (checkmax >= checkcnt); 2974 assert (checkmax >= checkcnt);
1710 array_verify (EV_A_ (W *)checks, checkcnt); 2975 array_verify (EV_A_ (W *)checks, checkcnt);
2976#endif
1711 2977
1712# if 0 2978# if 0
2979#if EV_CHILD_ENABLE
1713 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2980 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1714 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 2981 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2982#endif
1715# endif 2983# endif
1716#endif 2984#endif
1717} 2985}
1718 2986#endif
1719#endif /* multiplicity */
1720 2987
1721#if EV_MULTIPLICITY 2988#if EV_MULTIPLICITY
1722struct ev_loop * 2989struct ev_loop * ecb_cold
1723ev_default_loop_init (unsigned int flags)
1724#else 2990#else
1725int 2991int
2992#endif
1726ev_default_loop (unsigned int flags) 2993ev_default_loop (unsigned int flags) EV_THROW
1727#endif
1728{ 2994{
1729 if (!ev_default_loop_ptr) 2995 if (!ev_default_loop_ptr)
1730 { 2996 {
1731#if EV_MULTIPLICITY 2997#if EV_MULTIPLICITY
1732 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2998 EV_P = ev_default_loop_ptr = &default_loop_struct;
1733#else 2999#else
1734 ev_default_loop_ptr = 1; 3000 ev_default_loop_ptr = 1;
1735#endif 3001#endif
1736 3002
1737 loop_init (EV_A_ flags); 3003 loop_init (EV_A_ flags);
1738 3004
1739 if (ev_backend (EV_A)) 3005 if (ev_backend (EV_A))
1740 { 3006 {
1741#ifndef _WIN32 3007#if EV_CHILD_ENABLE
1742 ev_signal_init (&childev, childcb, SIGCHLD); 3008 ev_signal_init (&childev, childcb, SIGCHLD);
1743 ev_set_priority (&childev, EV_MAXPRI); 3009 ev_set_priority (&childev, EV_MAXPRI);
1744 ev_signal_start (EV_A_ &childev); 3010 ev_signal_start (EV_A_ &childev);
1745 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3011 ev_unref (EV_A); /* child watcher should not keep loop alive */
1746#endif 3012#endif
… …
1751 3017
1752 return ev_default_loop_ptr; 3018 return ev_default_loop_ptr;
1753} 3019}
1754 3020
1755void 3021void
1756ev_default_destroy (void) 3022ev_loop_fork (EV_P) EV_THROW
1757{ 3023{
1758#if EV_MULTIPLICITY 3024 postfork = 1;
1759 struct ev_loop *loop = ev_default_loop_ptr;
1760#endif
1761
1762 ev_default_loop_ptr = 0;
1763
1764#ifndef _WIN32
1765 ev_ref (EV_A); /* child watcher */
1766 ev_signal_stop (EV_A_ &childev);
1767#endif
1768
1769 loop_destroy (EV_A);
1770}
1771
1772void
1773ev_default_fork (void)
1774{
1775#if EV_MULTIPLICITY
1776 struct ev_loop *loop = ev_default_loop_ptr;
1777#endif
1778
1779 postfork = 1; /* must be in line with ev_loop_fork */
1780} 3025}
1781 3026
1782/*****************************************************************************/ 3027/*****************************************************************************/
1783 3028
1784void 3029void
1785ev_invoke (EV_P_ void *w, int revents) 3030ev_invoke (EV_P_ void *w, int revents)
1786{ 3031{
1787 EV_CB_INVOKE ((W)w, revents); 3032 EV_CB_INVOKE ((W)w, revents);
1788} 3033}
1789 3034
1790inline_speed void 3035unsigned int
1791call_pending (EV_P) 3036ev_pending_count (EV_P) EV_THROW
1792{ 3037{
1793 int pri; 3038 int pri;
3039 unsigned int count = 0;
1794 3040
1795 for (pri = NUMPRI; pri--; ) 3041 for (pri = NUMPRI; pri--; )
3042 count += pendingcnt [pri];
3043
3044 return count;
3045}
3046
3047void noinline
3048ev_invoke_pending (EV_P)
3049{
3050 pendingpri = NUMPRI;
3051
3052 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3053 {
3054 --pendingpri;
3055
1796 while (pendingcnt [pri]) 3056 while (pendingcnt [pendingpri])
1797 { 3057 {
1798 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3058 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1799 3059
1800 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1801 /* ^ this is no longer true, as pending_w could be here */
1802
1803 p->w->pending = 0; 3060 p->w->pending = 0;
1804 EV_CB_INVOKE (p->w, p->events); 3061 EV_CB_INVOKE (p->w, p->events);
1805 EV_FREQUENT_CHECK; 3062 EV_FREQUENT_CHECK;
1806 } 3063 }
3064 }
1807} 3065}
1808 3066
1809#if EV_IDLE_ENABLE 3067#if EV_IDLE_ENABLE
1810/* make idle watchers pending. this handles the "call-idle */ 3068/* make idle watchers pending. this handles the "call-idle */
1811/* only when higher priorities are idle" logic */ 3069/* only when higher priorities are idle" logic */
… …
1863 EV_FREQUENT_CHECK; 3121 EV_FREQUENT_CHECK;
1864 feed_reverse (EV_A_ (W)w); 3122 feed_reverse (EV_A_ (W)w);
1865 } 3123 }
1866 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3124 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1867 3125
1868 feed_reverse_done (EV_A_ EV_TIMEOUT); 3126 feed_reverse_done (EV_A_ EV_TIMER);
1869 } 3127 }
1870} 3128}
1871 3129
1872#if EV_PERIODIC_ENABLE 3130#if EV_PERIODIC_ENABLE
3131
3132static void noinline
3133periodic_recalc (EV_P_ ev_periodic *w)
3134{
3135 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3136 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3137
3138 /* the above almost always errs on the low side */
3139 while (at <= ev_rt_now)
3140 {
3141 ev_tstamp nat = at + w->interval;
3142
3143 /* when resolution fails us, we use ev_rt_now */
3144 if (expect_false (nat == at))
3145 {
3146 at = ev_rt_now;
3147 break;
3148 }
3149
3150 at = nat;
3151 }
3152
3153 ev_at (w) = at;
3154}
3155
1873/* make periodics pending */ 3156/* make periodics pending */
1874inline_size void 3157inline_size void
1875periodics_reify (EV_P) 3158periodics_reify (EV_P)
1876{ 3159{
1877 EV_FREQUENT_CHECK; 3160 EV_FREQUENT_CHECK;
1878 3161
1879 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3162 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1880 { 3163 {
1881 int feed_count = 0;
1882
1883 do 3164 do
1884 { 3165 {
1885 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3166 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1886 3167
1887 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3168 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1896 ANHE_at_cache (periodics [HEAP0]); 3177 ANHE_at_cache (periodics [HEAP0]);
1897 downheap (periodics, periodiccnt, HEAP0); 3178 downheap (periodics, periodiccnt, HEAP0);
1898 } 3179 }
1899 else if (w->interval) 3180 else if (w->interval)
1900 { 3181 {
1901 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3182 periodic_recalc (EV_A_ w);
1902 /* if next trigger time is not sufficiently in the future, put it there */
1903 /* this might happen because of floating point inexactness */
1904 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1905 {
1906 ev_at (w) += w->interval;
1907
1908 /* if interval is unreasonably low we might still have a time in the past */
1909 /* so correct this. this will make the periodic very inexact, but the user */
1910 /* has effectively asked to get triggered more often than possible */
1911 if (ev_at (w) < ev_rt_now)
1912 ev_at (w) = ev_rt_now;
1913 }
1914
1915 ANHE_at_cache (periodics [HEAP0]); 3183 ANHE_at_cache (periodics [HEAP0]);
1916 downheap (periodics, periodiccnt, HEAP0); 3184 downheap (periodics, periodiccnt, HEAP0);
1917 } 3185 }
1918 else 3186 else
1919 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3187 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1926 feed_reverse_done (EV_A_ EV_PERIODIC); 3194 feed_reverse_done (EV_A_ EV_PERIODIC);
1927 } 3195 }
1928} 3196}
1929 3197
1930/* simply recalculate all periodics */ 3198/* simply recalculate all periodics */
1931/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 3199/* TODO: maybe ensure that at least one event happens when jumping forward? */
1932static void noinline 3200static void noinline ecb_cold
1933periodics_reschedule (EV_P) 3201periodics_reschedule (EV_P)
1934{ 3202{
1935 int i; 3203 int i;
1936 3204
1937 /* adjust periodics after time jump */ 3205 /* adjust periodics after time jump */
… …
1940 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3208 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1941 3209
1942 if (w->reschedule_cb) 3210 if (w->reschedule_cb)
1943 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3211 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1944 else if (w->interval) 3212 else if (w->interval)
1945 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3213 periodic_recalc (EV_A_ w);
1946 3214
1947 ANHE_at_cache (periodics [i]); 3215 ANHE_at_cache (periodics [i]);
1948 } 3216 }
1949 3217
1950 reheap (periodics, periodiccnt); 3218 reheap (periodics, periodiccnt);
1951} 3219}
1952#endif 3220#endif
1953 3221
1954/* adjust all timers by a given offset */ 3222/* adjust all timers by a given offset */
1955static void noinline 3223static void noinline ecb_cold
1956timers_reschedule (EV_P_ ev_tstamp adjust) 3224timers_reschedule (EV_P_ ev_tstamp adjust)
1957{ 3225{
1958 int i; 3226 int i;
1959 3227
1960 for (i = 0; i < timercnt; ++i) 3228 for (i = 0; i < timercnt; ++i)
… …
1964 ANHE_at_cache (*he); 3232 ANHE_at_cache (*he);
1965 } 3233 }
1966} 3234}
1967 3235
1968/* fetch new monotonic and realtime times from the kernel */ 3236/* fetch new monotonic and realtime times from the kernel */
1969/* also detetc if there was a timejump, and act accordingly */ 3237/* also detect if there was a timejump, and act accordingly */
1970inline_speed void 3238inline_speed void
1971time_update (EV_P_ ev_tstamp max_block) 3239time_update (EV_P_ ev_tstamp max_block)
1972{ 3240{
1973#if EV_USE_MONOTONIC 3241#if EV_USE_MONOTONIC
1974 if (expect_true (have_monotonic)) 3242 if (expect_true (have_monotonic))
… …
1997 * doesn't hurt either as we only do this on time-jumps or 3265 * doesn't hurt either as we only do this on time-jumps or
1998 * in the unlikely event of having been preempted here. 3266 * in the unlikely event of having been preempted here.
1999 */ 3267 */
2000 for (i = 4; --i; ) 3268 for (i = 4; --i; )
2001 { 3269 {
3270 ev_tstamp diff;
2002 rtmn_diff = ev_rt_now - mn_now; 3271 rtmn_diff = ev_rt_now - mn_now;
2003 3272
3273 diff = odiff - rtmn_diff;
3274
2004 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3275 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2005 return; /* all is well */ 3276 return; /* all is well */
2006 3277
2007 ev_rt_now = ev_time (); 3278 ev_rt_now = ev_time ();
2008 mn_now = get_clock (); 3279 mn_now = get_clock ();
2009 now_floor = mn_now; 3280 now_floor = mn_now;
… …
2031 3302
2032 mn_now = ev_rt_now; 3303 mn_now = ev_rt_now;
2033 } 3304 }
2034} 3305}
2035 3306
2036void 3307int
2037ev_loop (EV_P_ int flags) 3308ev_run (EV_P_ int flags)
2038{ 3309{
3310#if EV_FEATURE_API
2039 ++loop_depth; 3311 ++loop_depth;
3312#endif
2040 3313
3314 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3315
2041 loop_done = EVUNLOOP_CANCEL; 3316 loop_done = EVBREAK_CANCEL;
2042 3317
2043 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3318 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2044 3319
2045 do 3320 do
2046 { 3321 {
2047#if EV_VERIFY >= 2 3322#if EV_VERIFY >= 2
2048 ev_loop_verify (EV_A); 3323 ev_verify (EV_A);
2049#endif 3324#endif
2050 3325
2051#ifndef _WIN32 3326#ifndef _WIN32
2052 if (expect_false (curpid)) /* penalise the forking check even more */ 3327 if (expect_false (curpid)) /* penalise the forking check even more */
2053 if (expect_false (getpid () != curpid)) 3328 if (expect_false (getpid () != curpid))
… …
2061 /* we might have forked, so queue fork handlers */ 3336 /* we might have forked, so queue fork handlers */
2062 if (expect_false (postfork)) 3337 if (expect_false (postfork))
2063 if (forkcnt) 3338 if (forkcnt)
2064 { 3339 {
2065 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3340 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2066 call_pending (EV_A); 3341 EV_INVOKE_PENDING;
2067 } 3342 }
2068#endif 3343#endif
2069 3344
3345#if EV_PREPARE_ENABLE
2070 /* queue prepare watchers (and execute them) */ 3346 /* queue prepare watchers (and execute them) */
2071 if (expect_false (preparecnt)) 3347 if (expect_false (preparecnt))
2072 { 3348 {
2073 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3349 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2074 call_pending (EV_A); 3350 EV_INVOKE_PENDING;
2075 } 3351 }
3352#endif
3353
3354 if (expect_false (loop_done))
3355 break;
2076 3356
2077 /* we might have forked, so reify kernel state if necessary */ 3357 /* we might have forked, so reify kernel state if necessary */
2078 if (expect_false (postfork)) 3358 if (expect_false (postfork))
2079 loop_fork (EV_A); 3359 loop_fork (EV_A);
2080 3360
… …
2084 /* calculate blocking time */ 3364 /* calculate blocking time */
2085 { 3365 {
2086 ev_tstamp waittime = 0.; 3366 ev_tstamp waittime = 0.;
2087 ev_tstamp sleeptime = 0.; 3367 ev_tstamp sleeptime = 0.;
2088 3368
3369 /* remember old timestamp for io_blocktime calculation */
3370 ev_tstamp prev_mn_now = mn_now;
3371
3372 /* update time to cancel out callback processing overhead */
3373 time_update (EV_A_ 1e100);
3374
3375 /* from now on, we want a pipe-wake-up */
3376 pipe_write_wanted = 1;
3377
3378 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3379
2089 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3380 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2090 { 3381 {
2091 /* remember old timestamp for io_blocktime calculation */
2092 ev_tstamp prev_mn_now = mn_now;
2093
2094 /* update time to cancel out callback processing overhead */
2095 time_update (EV_A_ 1e100);
2096
2097 waittime = MAX_BLOCKTIME; 3382 waittime = MAX_BLOCKTIME;
2098 3383
2099 if (timercnt) 3384 if (timercnt)
2100 { 3385 {
2101 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3386 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2102 if (waittime > to) waittime = to; 3387 if (waittime > to) waittime = to;
2103 } 3388 }
2104 3389
2105#if EV_PERIODIC_ENABLE 3390#if EV_PERIODIC_ENABLE
2106 if (periodiccnt) 3391 if (periodiccnt)
2107 { 3392 {
2108 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3393 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2109 if (waittime > to) waittime = to; 3394 if (waittime > to) waittime = to;
2110 } 3395 }
2111#endif 3396#endif
2112 3397
2113 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3398 /* don't let timeouts decrease the waittime below timeout_blocktime */
2114 if (expect_false (waittime < timeout_blocktime)) 3399 if (expect_false (waittime < timeout_blocktime))
2115 waittime = timeout_blocktime; 3400 waittime = timeout_blocktime;
3401
3402 /* at this point, we NEED to wait, so we have to ensure */
3403 /* to pass a minimum nonzero value to the backend */
3404 if (expect_false (waittime < backend_mintime))
3405 waittime = backend_mintime;
2116 3406
2117 /* extra check because io_blocktime is commonly 0 */ 3407 /* extra check because io_blocktime is commonly 0 */
2118 if (expect_false (io_blocktime)) 3408 if (expect_false (io_blocktime))
2119 { 3409 {
2120 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3410 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2121 3411
2122 if (sleeptime > waittime - backend_fudge) 3412 if (sleeptime > waittime - backend_mintime)
2123 sleeptime = waittime - backend_fudge; 3413 sleeptime = waittime - backend_mintime;
2124 3414
2125 if (expect_true (sleeptime > 0.)) 3415 if (expect_true (sleeptime > 0.))
2126 { 3416 {
2127 ev_sleep (sleeptime); 3417 ev_sleep (sleeptime);
2128 waittime -= sleeptime; 3418 waittime -= sleeptime;
2129 } 3419 }
2130 } 3420 }
2131 } 3421 }
2132 3422
3423#if EV_FEATURE_API
2133 ++loop_count; 3424 ++loop_count;
3425#endif
3426 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2134 backend_poll (EV_A_ waittime); 3427 backend_poll (EV_A_ waittime);
3428 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3429
3430 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3431
3432 ECB_MEMORY_FENCE_ACQUIRE;
3433 if (pipe_write_skipped)
3434 {
3435 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3436 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3437 }
3438
2135 3439
2136 /* update ev_rt_now, do magic */ 3440 /* update ev_rt_now, do magic */
2137 time_update (EV_A_ waittime + sleeptime); 3441 time_update (EV_A_ waittime + sleeptime);
2138 } 3442 }
2139 3443
… …
2146#if EV_IDLE_ENABLE 3450#if EV_IDLE_ENABLE
2147 /* queue idle watchers unless other events are pending */ 3451 /* queue idle watchers unless other events are pending */
2148 idle_reify (EV_A); 3452 idle_reify (EV_A);
2149#endif 3453#endif
2150 3454
3455#if EV_CHECK_ENABLE
2151 /* queue check watchers, to be executed first */ 3456 /* queue check watchers, to be executed first */
2152 if (expect_false (checkcnt)) 3457 if (expect_false (checkcnt))
2153 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3458 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3459#endif
2154 3460
2155 call_pending (EV_A); 3461 EV_INVOKE_PENDING;
2156 } 3462 }
2157 while (expect_true ( 3463 while (expect_true (
2158 activecnt 3464 activecnt
2159 && !loop_done 3465 && !loop_done
2160 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3466 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2161 )); 3467 ));
2162 3468
2163 if (loop_done == EVUNLOOP_ONE) 3469 if (loop_done == EVBREAK_ONE)
2164 loop_done = EVUNLOOP_CANCEL; 3470 loop_done = EVBREAK_CANCEL;
2165 3471
3472#if EV_FEATURE_API
2166 --loop_depth; 3473 --loop_depth;
3474#endif
3475
3476 return activecnt;
2167} 3477}
2168 3478
2169void 3479void
2170ev_unloop (EV_P_ int how) 3480ev_break (EV_P_ int how) EV_THROW
2171{ 3481{
2172 loop_done = how; 3482 loop_done = how;
2173} 3483}
2174 3484
2175void 3485void
2176ev_ref (EV_P) 3486ev_ref (EV_P) EV_THROW
2177{ 3487{
2178 ++activecnt; 3488 ++activecnt;
2179} 3489}
2180 3490
2181void 3491void
2182ev_unref (EV_P) 3492ev_unref (EV_P) EV_THROW
2183{ 3493{
2184 --activecnt; 3494 --activecnt;
2185} 3495}
2186 3496
2187void 3497void
2188ev_now_update (EV_P) 3498ev_now_update (EV_P) EV_THROW
2189{ 3499{
2190 time_update (EV_A_ 1e100); 3500 time_update (EV_A_ 1e100);
2191} 3501}
2192 3502
2193void 3503void
2194ev_suspend (EV_P) 3504ev_suspend (EV_P) EV_THROW
2195{ 3505{
2196 ev_now_update (EV_A); 3506 ev_now_update (EV_A);
2197} 3507}
2198 3508
2199void 3509void
2200ev_resume (EV_P) 3510ev_resume (EV_P) EV_THROW
2201{ 3511{
2202 ev_tstamp mn_prev = mn_now; 3512 ev_tstamp mn_prev = mn_now;
2203 3513
2204 ev_now_update (EV_A); 3514 ev_now_update (EV_A);
2205 timers_reschedule (EV_A_ mn_now - mn_prev); 3515 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2222inline_size void 3532inline_size void
2223wlist_del (WL *head, WL elem) 3533wlist_del (WL *head, WL elem)
2224{ 3534{
2225 while (*head) 3535 while (*head)
2226 { 3536 {
2227 if (*head == elem) 3537 if (expect_true (*head == elem))
2228 { 3538 {
2229 *head = elem->next; 3539 *head = elem->next;
2230 return; 3540 break;
2231 } 3541 }
2232 3542
2233 head = &(*head)->next; 3543 head = &(*head)->next;
2234 } 3544 }
2235} 3545}
… …
2244 w->pending = 0; 3554 w->pending = 0;
2245 } 3555 }
2246} 3556}
2247 3557
2248int 3558int
2249ev_clear_pending (EV_P_ void *w) 3559ev_clear_pending (EV_P_ void *w) EV_THROW
2250{ 3560{
2251 W w_ = (W)w; 3561 W w_ = (W)w;
2252 int pending = w_->pending; 3562 int pending = w_->pending;
2253 3563
2254 if (expect_true (pending)) 3564 if (expect_true (pending))
… …
2287} 3597}
2288 3598
2289/*****************************************************************************/ 3599/*****************************************************************************/
2290 3600
2291void noinline 3601void noinline
2292ev_io_start (EV_P_ ev_io *w) 3602ev_io_start (EV_P_ ev_io *w) EV_THROW
2293{ 3603{
2294 int fd = w->fd; 3604 int fd = w->fd;
2295 3605
2296 if (expect_false (ev_is_active (w))) 3606 if (expect_false (ev_is_active (w)))
2297 return; 3607 return;
2298 3608
2299 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 3609 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2300 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3610 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2301 3611
2302 EV_FREQUENT_CHECK; 3612 EV_FREQUENT_CHECK;
2303 3613
2304 ev_start (EV_A_ (W)w, 1); 3614 ev_start (EV_A_ (W)w, 1);
2305 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3615 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2306 wlist_add (&anfds[fd].head, (WL)w); 3616 wlist_add (&anfds[fd].head, (WL)w);
2307 3617
3618 /* common bug, apparently */
3619 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3620
2308 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1); 3621 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2309 w->events &= ~EV__IOFDSET; 3622 w->events &= ~EV__IOFDSET;
2310 3623
2311 EV_FREQUENT_CHECK; 3624 EV_FREQUENT_CHECK;
2312} 3625}
2313 3626
2314void noinline 3627void noinline
2315ev_io_stop (EV_P_ ev_io *w) 3628ev_io_stop (EV_P_ ev_io *w) EV_THROW
2316{ 3629{
2317 clear_pending (EV_A_ (W)w); 3630 clear_pending (EV_A_ (W)w);
2318 if (expect_false (!ev_is_active (w))) 3631 if (expect_false (!ev_is_active (w)))
2319 return; 3632 return;
2320 3633
… …
2323 EV_FREQUENT_CHECK; 3636 EV_FREQUENT_CHECK;
2324 3637
2325 wlist_del (&anfds[w->fd].head, (WL)w); 3638 wlist_del (&anfds[w->fd].head, (WL)w);
2326 ev_stop (EV_A_ (W)w); 3639 ev_stop (EV_A_ (W)w);
2327 3640
2328 fd_change (EV_A_ w->fd, 1); 3641 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2329 3642
2330 EV_FREQUENT_CHECK; 3643 EV_FREQUENT_CHECK;
2331} 3644}
2332 3645
2333void noinline 3646void noinline
2334ev_timer_start (EV_P_ ev_timer *w) 3647ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2335{ 3648{
2336 if (expect_false (ev_is_active (w))) 3649 if (expect_false (ev_is_active (w)))
2337 return; 3650 return;
2338 3651
2339 ev_at (w) += mn_now; 3652 ev_at (w) += mn_now;
… …
2353 3666
2354 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3667 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2355} 3668}
2356 3669
2357void noinline 3670void noinline
2358ev_timer_stop (EV_P_ ev_timer *w) 3671ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2359{ 3672{
2360 clear_pending (EV_A_ (W)w); 3673 clear_pending (EV_A_ (W)w);
2361 if (expect_false (!ev_is_active (w))) 3674 if (expect_false (!ev_is_active (w)))
2362 return; 3675 return;
2363 3676
… …
2375 timers [active] = timers [timercnt + HEAP0]; 3688 timers [active] = timers [timercnt + HEAP0];
2376 adjustheap (timers, timercnt, active); 3689 adjustheap (timers, timercnt, active);
2377 } 3690 }
2378 } 3691 }
2379 3692
2380 EV_FREQUENT_CHECK;
2381
2382 ev_at (w) -= mn_now; 3693 ev_at (w) -= mn_now;
2383 3694
2384 ev_stop (EV_A_ (W)w); 3695 ev_stop (EV_A_ (W)w);
3696
3697 EV_FREQUENT_CHECK;
2385} 3698}
2386 3699
2387void noinline 3700void noinline
2388ev_timer_again (EV_P_ ev_timer *w) 3701ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2389{ 3702{
2390 EV_FREQUENT_CHECK; 3703 EV_FREQUENT_CHECK;
3704
3705 clear_pending (EV_A_ (W)w);
2391 3706
2392 if (ev_is_active (w)) 3707 if (ev_is_active (w))
2393 { 3708 {
2394 if (w->repeat) 3709 if (w->repeat)
2395 { 3710 {
… …
2407 } 3722 }
2408 3723
2409 EV_FREQUENT_CHECK; 3724 EV_FREQUENT_CHECK;
2410} 3725}
2411 3726
3727ev_tstamp
3728ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3729{
3730 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3731}
3732
2412#if EV_PERIODIC_ENABLE 3733#if EV_PERIODIC_ENABLE
2413void noinline 3734void noinline
2414ev_periodic_start (EV_P_ ev_periodic *w) 3735ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2415{ 3736{
2416 if (expect_false (ev_is_active (w))) 3737 if (expect_false (ev_is_active (w)))
2417 return; 3738 return;
2418 3739
2419 if (w->reschedule_cb) 3740 if (w->reschedule_cb)
2420 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3741 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2421 else if (w->interval) 3742 else if (w->interval)
2422 { 3743 {
2423 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3744 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2424 /* this formula differs from the one in periodic_reify because we do not always round up */ 3745 periodic_recalc (EV_A_ w);
2425 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2426 } 3746 }
2427 else 3747 else
2428 ev_at (w) = w->offset; 3748 ev_at (w) = w->offset;
2429 3749
2430 EV_FREQUENT_CHECK; 3750 EV_FREQUENT_CHECK;
… …
2440 3760
2441 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3761 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2442} 3762}
2443 3763
2444void noinline 3764void noinline
2445ev_periodic_stop (EV_P_ ev_periodic *w) 3765ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2446{ 3766{
2447 clear_pending (EV_A_ (W)w); 3767 clear_pending (EV_A_ (W)w);
2448 if (expect_false (!ev_is_active (w))) 3768 if (expect_false (!ev_is_active (w)))
2449 return; 3769 return;
2450 3770
… …
2462 periodics [active] = periodics [periodiccnt + HEAP0]; 3782 periodics [active] = periodics [periodiccnt + HEAP0];
2463 adjustheap (periodics, periodiccnt, active); 3783 adjustheap (periodics, periodiccnt, active);
2464 } 3784 }
2465 } 3785 }
2466 3786
2467 EV_FREQUENT_CHECK;
2468
2469 ev_stop (EV_A_ (W)w); 3787 ev_stop (EV_A_ (W)w);
3788
3789 EV_FREQUENT_CHECK;
2470} 3790}
2471 3791
2472void noinline 3792void noinline
2473ev_periodic_again (EV_P_ ev_periodic *w) 3793ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2474{ 3794{
2475 /* TODO: use adjustheap and recalculation */ 3795 /* TODO: use adjustheap and recalculation */
2476 ev_periodic_stop (EV_A_ w); 3796 ev_periodic_stop (EV_A_ w);
2477 ev_periodic_start (EV_A_ w); 3797 ev_periodic_start (EV_A_ w);
2478} 3798}
… …
2480 3800
2481#ifndef SA_RESTART 3801#ifndef SA_RESTART
2482# define SA_RESTART 0 3802# define SA_RESTART 0
2483#endif 3803#endif
2484 3804
3805#if EV_SIGNAL_ENABLE
3806
2485void noinline 3807void noinline
2486ev_signal_start (EV_P_ ev_signal *w) 3808ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2487{ 3809{
2488#if EV_MULTIPLICITY
2489 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2490#endif
2491 if (expect_false (ev_is_active (w))) 3810 if (expect_false (ev_is_active (w)))
2492 return; 3811 return;
2493 3812
2494 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 3813 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2495 3814
2496 evpipe_init (EV_A); 3815#if EV_MULTIPLICITY
3816 assert (("libev: a signal must not be attached to two different loops",
3817 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2497 3818
2498 EV_FREQUENT_CHECK; 3819 signals [w->signum - 1].loop = EV_A;
3820 ECB_MEMORY_FENCE_RELEASE;
3821#endif
2499 3822
3823 EV_FREQUENT_CHECK;
3824
3825#if EV_USE_SIGNALFD
3826 if (sigfd == -2)
2500 { 3827 {
2501#ifndef _WIN32 3828 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2502 sigset_t full, prev; 3829 if (sigfd < 0 && errno == EINVAL)
2503 sigfillset (&full); 3830 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2504 sigprocmask (SIG_SETMASK, &full, &prev);
2505#endif
2506 3831
2507 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 3832 if (sigfd >= 0)
3833 {
3834 fd_intern (sigfd); /* doing it twice will not hurt */
2508 3835
2509#ifndef _WIN32 3836 sigemptyset (&sigfd_set);
2510 sigprocmask (SIG_SETMASK, &prev, 0); 3837
2511#endif 3838 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3839 ev_set_priority (&sigfd_w, EV_MAXPRI);
3840 ev_io_start (EV_A_ &sigfd_w);
3841 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3842 }
2512 } 3843 }
3844
3845 if (sigfd >= 0)
3846 {
3847 /* TODO: check .head */
3848 sigaddset (&sigfd_set, w->signum);
3849 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3850
3851 signalfd (sigfd, &sigfd_set, 0);
3852 }
3853#endif
2513 3854
2514 ev_start (EV_A_ (W)w, 1); 3855 ev_start (EV_A_ (W)w, 1);
2515 wlist_add (&signals [w->signum - 1].head, (WL)w); 3856 wlist_add (&signals [w->signum - 1].head, (WL)w);
2516 3857
2517 if (!((WL)w)->next) 3858 if (!((WL)w)->next)
3859# if EV_USE_SIGNALFD
3860 if (sigfd < 0) /*TODO*/
3861# endif
2518 { 3862 {
2519#if _WIN32 3863# ifdef _WIN32
3864 evpipe_init (EV_A);
3865
2520 signal (w->signum, ev_sighandler); 3866 signal (w->signum, ev_sighandler);
2521#else 3867# else
2522 struct sigaction sa; 3868 struct sigaction sa;
3869
3870 evpipe_init (EV_A);
3871
2523 sa.sa_handler = ev_sighandler; 3872 sa.sa_handler = ev_sighandler;
2524 sigfillset (&sa.sa_mask); 3873 sigfillset (&sa.sa_mask);
2525 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3874 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2526 sigaction (w->signum, &sa, 0); 3875 sigaction (w->signum, &sa, 0);
3876
3877 if (origflags & EVFLAG_NOSIGMASK)
3878 {
3879 sigemptyset (&sa.sa_mask);
3880 sigaddset (&sa.sa_mask, w->signum);
3881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3882 }
2527#endif 3883#endif
2528 } 3884 }
2529 3885
2530 EV_FREQUENT_CHECK; 3886 EV_FREQUENT_CHECK;
2531} 3887}
2532 3888
2533void noinline 3889void noinline
2534ev_signal_stop (EV_P_ ev_signal *w) 3890ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2535{ 3891{
2536 clear_pending (EV_A_ (W)w); 3892 clear_pending (EV_A_ (W)w);
2537 if (expect_false (!ev_is_active (w))) 3893 if (expect_false (!ev_is_active (w)))
2538 return; 3894 return;
2539 3895
… …
2541 3897
2542 wlist_del (&signals [w->signum - 1].head, (WL)w); 3898 wlist_del (&signals [w->signum - 1].head, (WL)w);
2543 ev_stop (EV_A_ (W)w); 3899 ev_stop (EV_A_ (W)w);
2544 3900
2545 if (!signals [w->signum - 1].head) 3901 if (!signals [w->signum - 1].head)
3902 {
3903#if EV_MULTIPLICITY
3904 signals [w->signum - 1].loop = 0; /* unattach from signal */
3905#endif
3906#if EV_USE_SIGNALFD
3907 if (sigfd >= 0)
3908 {
3909 sigset_t ss;
3910
3911 sigemptyset (&ss);
3912 sigaddset (&ss, w->signum);
3913 sigdelset (&sigfd_set, w->signum);
3914
3915 signalfd (sigfd, &sigfd_set, 0);
3916 sigprocmask (SIG_UNBLOCK, &ss, 0);
3917 }
3918 else
3919#endif
2546 signal (w->signum, SIG_DFL); 3920 signal (w->signum, SIG_DFL);
3921 }
2547 3922
2548 EV_FREQUENT_CHECK; 3923 EV_FREQUENT_CHECK;
2549} 3924}
3925
3926#endif
3927
3928#if EV_CHILD_ENABLE
2550 3929
2551void 3930void
2552ev_child_start (EV_P_ ev_child *w) 3931ev_child_start (EV_P_ ev_child *w) EV_THROW
2553{ 3932{
2554#if EV_MULTIPLICITY 3933#if EV_MULTIPLICITY
2555 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3934 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2556#endif 3935#endif
2557 if (expect_false (ev_is_active (w))) 3936 if (expect_false (ev_is_active (w)))
2558 return; 3937 return;
2559 3938
2560 EV_FREQUENT_CHECK; 3939 EV_FREQUENT_CHECK;
2561 3940
2562 ev_start (EV_A_ (W)w, 1); 3941 ev_start (EV_A_ (W)w, 1);
2563 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3942 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2564 3943
2565 EV_FREQUENT_CHECK; 3944 EV_FREQUENT_CHECK;
2566} 3945}
2567 3946
2568void 3947void
2569ev_child_stop (EV_P_ ev_child *w) 3948ev_child_stop (EV_P_ ev_child *w) EV_THROW
2570{ 3949{
2571 clear_pending (EV_A_ (W)w); 3950 clear_pending (EV_A_ (W)w);
2572 if (expect_false (!ev_is_active (w))) 3951 if (expect_false (!ev_is_active (w)))
2573 return; 3952 return;
2574 3953
2575 EV_FREQUENT_CHECK; 3954 EV_FREQUENT_CHECK;
2576 3955
2577 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3956 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2578 ev_stop (EV_A_ (W)w); 3957 ev_stop (EV_A_ (W)w);
2579 3958
2580 EV_FREQUENT_CHECK; 3959 EV_FREQUENT_CHECK;
2581} 3960}
3961
3962#endif
2582 3963
2583#if EV_STAT_ENABLE 3964#if EV_STAT_ENABLE
2584 3965
2585# ifdef _WIN32 3966# ifdef _WIN32
2586# undef lstat 3967# undef lstat
… …
2592#define MIN_STAT_INTERVAL 0.1074891 3973#define MIN_STAT_INTERVAL 0.1074891
2593 3974
2594static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3975static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2595 3976
2596#if EV_USE_INOTIFY 3977#if EV_USE_INOTIFY
2597# define EV_INOTIFY_BUFSIZE 8192 3978
3979/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3980# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2598 3981
2599static void noinline 3982static void noinline
2600infy_add (EV_P_ ev_stat *w) 3983infy_add (EV_P_ ev_stat *w)
2601{ 3984{
2602 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); 3985 w->wd = inotify_add_watch (fs_fd, w->path,
3986 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3987 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3988 | IN_DONT_FOLLOW | IN_MASK_ADD);
2603 3989
2604 if (w->wd < 0) 3990 if (w->wd >= 0)
3991 {
3992 struct statfs sfs;
3993
3994 /* now local changes will be tracked by inotify, but remote changes won't */
3995 /* unless the filesystem is known to be local, we therefore still poll */
3996 /* also do poll on <2.6.25, but with normal frequency */
3997
3998 if (!fs_2625)
3999 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4000 else if (!statfs (w->path, &sfs)
4001 && (sfs.f_type == 0x1373 /* devfs */
4002 || sfs.f_type == 0x4006 /* fat */
4003 || sfs.f_type == 0x4d44 /* msdos */
4004 || sfs.f_type == 0xEF53 /* ext2/3 */
4005 || sfs.f_type == 0x72b6 /* jffs2 */
4006 || sfs.f_type == 0x858458f6 /* ramfs */
4007 || sfs.f_type == 0x5346544e /* ntfs */
4008 || sfs.f_type == 0x3153464a /* jfs */
4009 || sfs.f_type == 0x9123683e /* btrfs */
4010 || sfs.f_type == 0x52654973 /* reiser3 */
4011 || sfs.f_type == 0x01021994 /* tmpfs */
4012 || sfs.f_type == 0x58465342 /* xfs */))
4013 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4014 else
4015 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2605 { 4016 }
4017 else
4018 {
4019 /* can't use inotify, continue to stat */
2606 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4020 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2607 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2608 4021
2609 /* monitor some parent directory for speedup hints */ 4022 /* if path is not there, monitor some parent directory for speedup hints */
2610 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 4023 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2611 /* but an efficiency issue only */ 4024 /* but an efficiency issue only */
2612 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4025 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2613 { 4026 {
2614 char path [4096]; 4027 char path [4096];
… …
2624 if (!pend || pend == path) 4037 if (!pend || pend == path)
2625 break; 4038 break;
2626 4039
2627 *pend = 0; 4040 *pend = 0;
2628 w->wd = inotify_add_watch (fs_fd, path, mask); 4041 w->wd = inotify_add_watch (fs_fd, path, mask);
2629 } 4042 }
2630 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4043 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2631 } 4044 }
2632 } 4045 }
2633 4046
2634 if (w->wd >= 0) 4047 if (w->wd >= 0)
2635 {
2636 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4048 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2637 4049
2638 /* now local changes will be tracked by inotify, but remote changes won't */ 4050 /* now re-arm timer, if required */
2639 /* unless the filesystem it known to be local, we therefore still poll */ 4051 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2640 /* also do poll on <2.6.25, but with normal frequency */
2641 struct statfs sfs;
2642
2643 if (fs_2625 && !statfs (w->path, &sfs))
2644 if (sfs.f_type == 0x1373 /* devfs */
2645 || sfs.f_type == 0xEF53 /* ext2/3 */
2646 || sfs.f_type == 0x3153464a /* jfs */
2647 || sfs.f_type == 0x52654973 /* reiser3 */
2648 || sfs.f_type == 0x01021994 /* tempfs */
2649 || sfs.f_type == 0x58465342 /* xfs */)
2650 return;
2651
2652 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2653 ev_timer_again (EV_A_ &w->timer); 4052 ev_timer_again (EV_A_ &w->timer);
2654 } 4053 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2655} 4054}
2656 4055
2657static void noinline 4056static void noinline
2658infy_del (EV_P_ ev_stat *w) 4057infy_del (EV_P_ ev_stat *w)
2659{ 4058{
… …
2662 4061
2663 if (wd < 0) 4062 if (wd < 0)
2664 return; 4063 return;
2665 4064
2666 w->wd = -2; 4065 w->wd = -2;
2667 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4066 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2668 wlist_del (&fs_hash [slot].head, (WL)w); 4067 wlist_del (&fs_hash [slot].head, (WL)w);
2669 4068
2670 /* remove this watcher, if others are watching it, they will rearm */ 4069 /* remove this watcher, if others are watching it, they will rearm */
2671 inotify_rm_watch (fs_fd, wd); 4070 inotify_rm_watch (fs_fd, wd);
2672} 4071}
… …
2674static void noinline 4073static void noinline
2675infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4074infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2676{ 4075{
2677 if (slot < 0) 4076 if (slot < 0)
2678 /* overflow, need to check for all hash slots */ 4077 /* overflow, need to check for all hash slots */
2679 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4078 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2680 infy_wd (EV_A_ slot, wd, ev); 4079 infy_wd (EV_A_ slot, wd, ev);
2681 else 4080 else
2682 { 4081 {
2683 WL w_; 4082 WL w_;
2684 4083
2685 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4084 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2686 { 4085 {
2687 ev_stat *w = (ev_stat *)w_; 4086 ev_stat *w = (ev_stat *)w_;
2688 w_ = w_->next; /* lets us remove this watcher and all before it */ 4087 w_ = w_->next; /* lets us remove this watcher and all before it */
2689 4088
2690 if (w->wd == wd || wd == -1) 4089 if (w->wd == wd || wd == -1)
2691 { 4090 {
2692 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4091 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2693 { 4092 {
2694 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4093 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2695 w->wd = -1; 4094 w->wd = -1;
2696 infy_add (EV_A_ w); /* re-add, no matter what */ 4095 infy_add (EV_A_ w); /* re-add, no matter what */
2697 } 4096 }
2698 4097
2699 stat_timer_cb (EV_A_ &w->timer, 0); 4098 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2704 4103
2705static void 4104static void
2706infy_cb (EV_P_ ev_io *w, int revents) 4105infy_cb (EV_P_ ev_io *w, int revents)
2707{ 4106{
2708 char buf [EV_INOTIFY_BUFSIZE]; 4107 char buf [EV_INOTIFY_BUFSIZE];
2709 struct inotify_event *ev = (struct inotify_event *)buf;
2710 int ofs; 4108 int ofs;
2711 int len = read (fs_fd, buf, sizeof (buf)); 4109 int len = read (fs_fd, buf, sizeof (buf));
2712 4110
2713 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4111 for (ofs = 0; ofs < len; )
4112 {
4113 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2714 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4114 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4115 ofs += sizeof (struct inotify_event) + ev->len;
4116 }
2715} 4117}
2716 4118
2717inline_size void 4119inline_size void ecb_cold
2718check_2625 (EV_P) 4120ev_check_2625 (EV_P)
2719{ 4121{
2720 /* kernels < 2.6.25 are borked 4122 /* kernels < 2.6.25 are borked
2721 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4123 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2722 */ 4124 */
2723 struct utsname buf; 4125 if (ev_linux_version () < 0x020619)
2724 int major, minor, micro;
2725
2726 if (uname (&buf))
2727 return; 4126 return;
2728 4127
2729 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2730 return;
2731
2732 if (major < 2
2733 || (major == 2 && minor < 6)
2734 || (major == 2 && minor == 6 && micro < 25))
2735 return;
2736
2737 fs_2625 = 1; 4128 fs_2625 = 1;
4129}
4130
4131inline_size int
4132infy_newfd (void)
4133{
4134#if defined IN_CLOEXEC && defined IN_NONBLOCK
4135 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4136 if (fd >= 0)
4137 return fd;
4138#endif
4139 return inotify_init ();
2738} 4140}
2739 4141
2740inline_size void 4142inline_size void
2741infy_init (EV_P) 4143infy_init (EV_P)
2742{ 4144{
2743 if (fs_fd != -2) 4145 if (fs_fd != -2)
2744 return; 4146 return;
2745 4147
2746 fs_fd = -1; 4148 fs_fd = -1;
2747 4149
2748 check_2625 (EV_A); 4150 ev_check_2625 (EV_A);
2749 4151
2750 fs_fd = inotify_init (); 4152 fs_fd = infy_newfd ();
2751 4153
2752 if (fs_fd >= 0) 4154 if (fs_fd >= 0)
2753 { 4155 {
4156 fd_intern (fs_fd);
2754 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4157 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2755 ev_set_priority (&fs_w, EV_MAXPRI); 4158 ev_set_priority (&fs_w, EV_MAXPRI);
2756 ev_io_start (EV_A_ &fs_w); 4159 ev_io_start (EV_A_ &fs_w);
4160 ev_unref (EV_A);
2757 } 4161 }
2758} 4162}
2759 4163
2760inline_size void 4164inline_size void
2761infy_fork (EV_P) 4165infy_fork (EV_P)
… …
2763 int slot; 4167 int slot;
2764 4168
2765 if (fs_fd < 0) 4169 if (fs_fd < 0)
2766 return; 4170 return;
2767 4171
4172 ev_ref (EV_A);
4173 ev_io_stop (EV_A_ &fs_w);
2768 close (fs_fd); 4174 close (fs_fd);
2769 fs_fd = inotify_init (); 4175 fs_fd = infy_newfd ();
2770 4176
4177 if (fs_fd >= 0)
4178 {
4179 fd_intern (fs_fd);
4180 ev_io_set (&fs_w, fs_fd, EV_READ);
4181 ev_io_start (EV_A_ &fs_w);
4182 ev_unref (EV_A);
4183 }
4184
2771 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4185 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2772 { 4186 {
2773 WL w_ = fs_hash [slot].head; 4187 WL w_ = fs_hash [slot].head;
2774 fs_hash [slot].head = 0; 4188 fs_hash [slot].head = 0;
2775 4189
2776 while (w_) 4190 while (w_)
… …
2781 w->wd = -1; 4195 w->wd = -1;
2782 4196
2783 if (fs_fd >= 0) 4197 if (fs_fd >= 0)
2784 infy_add (EV_A_ w); /* re-add, no matter what */ 4198 infy_add (EV_A_ w); /* re-add, no matter what */
2785 else 4199 else
4200 {
4201 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4202 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2786 ev_timer_again (EV_A_ &w->timer); 4203 ev_timer_again (EV_A_ &w->timer);
4204 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4205 }
2787 } 4206 }
2788 } 4207 }
2789} 4208}
2790 4209
2791#endif 4210#endif
… …
2795#else 4214#else
2796# define EV_LSTAT(p,b) lstat (p, b) 4215# define EV_LSTAT(p,b) lstat (p, b)
2797#endif 4216#endif
2798 4217
2799void 4218void
2800ev_stat_stat (EV_P_ ev_stat *w) 4219ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2801{ 4220{
2802 if (lstat (w->path, &w->attr) < 0) 4221 if (lstat (w->path, &w->attr) < 0)
2803 w->attr.st_nlink = 0; 4222 w->attr.st_nlink = 0;
2804 else if (!w->attr.st_nlink) 4223 else if (!w->attr.st_nlink)
2805 w->attr.st_nlink = 1; 4224 w->attr.st_nlink = 1;
… …
2808static void noinline 4227static void noinline
2809stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4228stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2810{ 4229{
2811 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4230 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2812 4231
2813 /* we copy this here each the time so that */ 4232 ev_statdata prev = w->attr;
2814 /* prev has the old value when the callback gets invoked */
2815 w->prev = w->attr;
2816 ev_stat_stat (EV_A_ w); 4233 ev_stat_stat (EV_A_ w);
2817 4234
2818 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4235 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2819 if ( 4236 if (
2820 w->prev.st_dev != w->attr.st_dev 4237 prev.st_dev != w->attr.st_dev
2821 || w->prev.st_ino != w->attr.st_ino 4238 || prev.st_ino != w->attr.st_ino
2822 || w->prev.st_mode != w->attr.st_mode 4239 || prev.st_mode != w->attr.st_mode
2823 || w->prev.st_nlink != w->attr.st_nlink 4240 || prev.st_nlink != w->attr.st_nlink
2824 || w->prev.st_uid != w->attr.st_uid 4241 || prev.st_uid != w->attr.st_uid
2825 || w->prev.st_gid != w->attr.st_gid 4242 || prev.st_gid != w->attr.st_gid
2826 || w->prev.st_rdev != w->attr.st_rdev 4243 || prev.st_rdev != w->attr.st_rdev
2827 || w->prev.st_size != w->attr.st_size 4244 || prev.st_size != w->attr.st_size
2828 || w->prev.st_atime != w->attr.st_atime 4245 || prev.st_atime != w->attr.st_atime
2829 || w->prev.st_mtime != w->attr.st_mtime 4246 || prev.st_mtime != w->attr.st_mtime
2830 || w->prev.st_ctime != w->attr.st_ctime 4247 || prev.st_ctime != w->attr.st_ctime
2831 ) { 4248 ) {
4249 /* we only update w->prev on actual differences */
4250 /* in case we test more often than invoke the callback, */
4251 /* to ensure that prev is always different to attr */
4252 w->prev = prev;
4253
2832 #if EV_USE_INOTIFY 4254 #if EV_USE_INOTIFY
2833 if (fs_fd >= 0) 4255 if (fs_fd >= 0)
2834 { 4256 {
2835 infy_del (EV_A_ w); 4257 infy_del (EV_A_ w);
2836 infy_add (EV_A_ w); 4258 infy_add (EV_A_ w);
… …
2841 ev_feed_event (EV_A_ w, EV_STAT); 4263 ev_feed_event (EV_A_ w, EV_STAT);
2842 } 4264 }
2843} 4265}
2844 4266
2845void 4267void
2846ev_stat_start (EV_P_ ev_stat *w) 4268ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2847{ 4269{
2848 if (expect_false (ev_is_active (w))) 4270 if (expect_false (ev_is_active (w)))
2849 return; 4271 return;
2850 4272
2851 ev_stat_stat (EV_A_ w); 4273 ev_stat_stat (EV_A_ w);
… …
2861 4283
2862 if (fs_fd >= 0) 4284 if (fs_fd >= 0)
2863 infy_add (EV_A_ w); 4285 infy_add (EV_A_ w);
2864 else 4286 else
2865#endif 4287#endif
4288 {
2866 ev_timer_again (EV_A_ &w->timer); 4289 ev_timer_again (EV_A_ &w->timer);
4290 ev_unref (EV_A);
4291 }
2867 4292
2868 ev_start (EV_A_ (W)w, 1); 4293 ev_start (EV_A_ (W)w, 1);
2869 4294
2870 EV_FREQUENT_CHECK; 4295 EV_FREQUENT_CHECK;
2871} 4296}
2872 4297
2873void 4298void
2874ev_stat_stop (EV_P_ ev_stat *w) 4299ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2875{ 4300{
2876 clear_pending (EV_A_ (W)w); 4301 clear_pending (EV_A_ (W)w);
2877 if (expect_false (!ev_is_active (w))) 4302 if (expect_false (!ev_is_active (w)))
2878 return; 4303 return;
2879 4304
2880 EV_FREQUENT_CHECK; 4305 EV_FREQUENT_CHECK;
2881 4306
2882#if EV_USE_INOTIFY 4307#if EV_USE_INOTIFY
2883 infy_del (EV_A_ w); 4308 infy_del (EV_A_ w);
2884#endif 4309#endif
4310
4311 if (ev_is_active (&w->timer))
4312 {
4313 ev_ref (EV_A);
2885 ev_timer_stop (EV_A_ &w->timer); 4314 ev_timer_stop (EV_A_ &w->timer);
4315 }
2886 4316
2887 ev_stop (EV_A_ (W)w); 4317 ev_stop (EV_A_ (W)w);
2888 4318
2889 EV_FREQUENT_CHECK; 4319 EV_FREQUENT_CHECK;
2890} 4320}
2891#endif 4321#endif
2892 4322
2893#if EV_IDLE_ENABLE 4323#if EV_IDLE_ENABLE
2894void 4324void
2895ev_idle_start (EV_P_ ev_idle *w) 4325ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2896{ 4326{
2897 if (expect_false (ev_is_active (w))) 4327 if (expect_false (ev_is_active (w)))
2898 return; 4328 return;
2899 4329
2900 pri_adjust (EV_A_ (W)w); 4330 pri_adjust (EV_A_ (W)w);
… …
2913 4343
2914 EV_FREQUENT_CHECK; 4344 EV_FREQUENT_CHECK;
2915} 4345}
2916 4346
2917void 4347void
2918ev_idle_stop (EV_P_ ev_idle *w) 4348ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2919{ 4349{
2920 clear_pending (EV_A_ (W)w); 4350 clear_pending (EV_A_ (W)w);
2921 if (expect_false (!ev_is_active (w))) 4351 if (expect_false (!ev_is_active (w)))
2922 return; 4352 return;
2923 4353
… …
2935 4365
2936 EV_FREQUENT_CHECK; 4366 EV_FREQUENT_CHECK;
2937} 4367}
2938#endif 4368#endif
2939 4369
4370#if EV_PREPARE_ENABLE
2940void 4371void
2941ev_prepare_start (EV_P_ ev_prepare *w) 4372ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2942{ 4373{
2943 if (expect_false (ev_is_active (w))) 4374 if (expect_false (ev_is_active (w)))
2944 return; 4375 return;
2945 4376
2946 EV_FREQUENT_CHECK; 4377 EV_FREQUENT_CHECK;
… …
2951 4382
2952 EV_FREQUENT_CHECK; 4383 EV_FREQUENT_CHECK;
2953} 4384}
2954 4385
2955void 4386void
2956ev_prepare_stop (EV_P_ ev_prepare *w) 4387ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2957{ 4388{
2958 clear_pending (EV_A_ (W)w); 4389 clear_pending (EV_A_ (W)w);
2959 if (expect_false (!ev_is_active (w))) 4390 if (expect_false (!ev_is_active (w)))
2960 return; 4391 return;
2961 4392
… …
2970 4401
2971 ev_stop (EV_A_ (W)w); 4402 ev_stop (EV_A_ (W)w);
2972 4403
2973 EV_FREQUENT_CHECK; 4404 EV_FREQUENT_CHECK;
2974} 4405}
4406#endif
2975 4407
4408#if EV_CHECK_ENABLE
2976void 4409void
2977ev_check_start (EV_P_ ev_check *w) 4410ev_check_start (EV_P_ ev_check *w) EV_THROW
2978{ 4411{
2979 if (expect_false (ev_is_active (w))) 4412 if (expect_false (ev_is_active (w)))
2980 return; 4413 return;
2981 4414
2982 EV_FREQUENT_CHECK; 4415 EV_FREQUENT_CHECK;
… …
2987 4420
2988 EV_FREQUENT_CHECK; 4421 EV_FREQUENT_CHECK;
2989} 4422}
2990 4423
2991void 4424void
2992ev_check_stop (EV_P_ ev_check *w) 4425ev_check_stop (EV_P_ ev_check *w) EV_THROW
2993{ 4426{
2994 clear_pending (EV_A_ (W)w); 4427 clear_pending (EV_A_ (W)w);
2995 if (expect_false (!ev_is_active (w))) 4428 if (expect_false (!ev_is_active (w)))
2996 return; 4429 return;
2997 4430
… …
3006 4439
3007 ev_stop (EV_A_ (W)w); 4440 ev_stop (EV_A_ (W)w);
3008 4441
3009 EV_FREQUENT_CHECK; 4442 EV_FREQUENT_CHECK;
3010} 4443}
4444#endif
3011 4445
3012#if EV_EMBED_ENABLE 4446#if EV_EMBED_ENABLE
3013void noinline 4447void noinline
3014ev_embed_sweep (EV_P_ ev_embed *w) 4448ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3015{ 4449{
3016 ev_loop (w->other, EVLOOP_NONBLOCK); 4450 ev_run (w->other, EVRUN_NOWAIT);
3017} 4451}
3018 4452
3019static void 4453static void
3020embed_io_cb (EV_P_ ev_io *io, int revents) 4454embed_io_cb (EV_P_ ev_io *io, int revents)
3021{ 4455{
3022 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4456 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3023 4457
3024 if (ev_cb (w)) 4458 if (ev_cb (w))
3025 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4459 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3026 else 4460 else
3027 ev_loop (w->other, EVLOOP_NONBLOCK); 4461 ev_run (w->other, EVRUN_NOWAIT);
3028} 4462}
3029 4463
3030static void 4464static void
3031embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4465embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3032{ 4466{
3033 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4467 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3034 4468
3035 { 4469 {
3036 struct ev_loop *loop = w->other; 4470 EV_P = w->other;
3037 4471
3038 while (fdchangecnt) 4472 while (fdchangecnt)
3039 { 4473 {
3040 fd_reify (EV_A); 4474 fd_reify (EV_A);
3041 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4475 ev_run (EV_A_ EVRUN_NOWAIT);
3042 } 4476 }
3043 } 4477 }
3044} 4478}
3045 4479
3046static void 4480static void
… …
3049 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 4483 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3050 4484
3051 ev_embed_stop (EV_A_ w); 4485 ev_embed_stop (EV_A_ w);
3052 4486
3053 { 4487 {
3054 struct ev_loop *loop = w->other; 4488 EV_P = w->other;
3055 4489
3056 ev_loop_fork (EV_A); 4490 ev_loop_fork (EV_A);
3057 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4491 ev_run (EV_A_ EVRUN_NOWAIT);
3058 } 4492 }
3059 4493
3060 ev_embed_start (EV_A_ w); 4494 ev_embed_start (EV_A_ w);
3061} 4495}
3062 4496
… …
3067 ev_idle_stop (EV_A_ idle); 4501 ev_idle_stop (EV_A_ idle);
3068} 4502}
3069#endif 4503#endif
3070 4504
3071void 4505void
3072ev_embed_start (EV_P_ ev_embed *w) 4506ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3073{ 4507{
3074 if (expect_false (ev_is_active (w))) 4508 if (expect_false (ev_is_active (w)))
3075 return; 4509 return;
3076 4510
3077 { 4511 {
3078 struct ev_loop *loop = w->other; 4512 EV_P = w->other;
3079 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4513 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3080 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4514 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3081 } 4515 }
3082 4516
3083 EV_FREQUENT_CHECK; 4517 EV_FREQUENT_CHECK;
… …
3098 4532
3099 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
3100} 4534}
3101 4535
3102void 4536void
3103ev_embed_stop (EV_P_ ev_embed *w) 4537ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3104{ 4538{
3105 clear_pending (EV_A_ (W)w); 4539 clear_pending (EV_A_ (W)w);
3106 if (expect_false (!ev_is_active (w))) 4540 if (expect_false (!ev_is_active (w)))
3107 return; 4541 return;
3108 4542
… …
3110 4544
3111 ev_io_stop (EV_A_ &w->io); 4545 ev_io_stop (EV_A_ &w->io);
3112 ev_prepare_stop (EV_A_ &w->prepare); 4546 ev_prepare_stop (EV_A_ &w->prepare);
3113 ev_fork_stop (EV_A_ &w->fork); 4547 ev_fork_stop (EV_A_ &w->fork);
3114 4548
4549 ev_stop (EV_A_ (W)w);
4550
3115 EV_FREQUENT_CHECK; 4551 EV_FREQUENT_CHECK;
3116} 4552}
3117#endif 4553#endif
3118 4554
3119#if EV_FORK_ENABLE 4555#if EV_FORK_ENABLE
3120void 4556void
3121ev_fork_start (EV_P_ ev_fork *w) 4557ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3122{ 4558{
3123 if (expect_false (ev_is_active (w))) 4559 if (expect_false (ev_is_active (w)))
3124 return; 4560 return;
3125 4561
3126 EV_FREQUENT_CHECK; 4562 EV_FREQUENT_CHECK;
… …
3131 4567
3132 EV_FREQUENT_CHECK; 4568 EV_FREQUENT_CHECK;
3133} 4569}
3134 4570
3135void 4571void
3136ev_fork_stop (EV_P_ ev_fork *w) 4572ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3137{ 4573{
3138 clear_pending (EV_A_ (W)w); 4574 clear_pending (EV_A_ (W)w);
3139 if (expect_false (!ev_is_active (w))) 4575 if (expect_false (!ev_is_active (w)))
3140 return; 4576 return;
3141 4577
… …
3152 4588
3153 EV_FREQUENT_CHECK; 4589 EV_FREQUENT_CHECK;
3154} 4590}
3155#endif 4591#endif
3156 4592
4593#if EV_CLEANUP_ENABLE
4594void
4595ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4596{
4597 if (expect_false (ev_is_active (w)))
4598 return;
4599
4600 EV_FREQUENT_CHECK;
4601
4602 ev_start (EV_A_ (W)w, ++cleanupcnt);
4603 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4604 cleanups [cleanupcnt - 1] = w;
4605
4606 /* cleanup watchers should never keep a refcount on the loop */
4607 ev_unref (EV_A);
4608 EV_FREQUENT_CHECK;
4609}
4610
4611void
4612ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4613{
4614 clear_pending (EV_A_ (W)w);
4615 if (expect_false (!ev_is_active (w)))
4616 return;
4617
4618 EV_FREQUENT_CHECK;
4619 ev_ref (EV_A);
4620
4621 {
4622 int active = ev_active (w);
4623
4624 cleanups [active - 1] = cleanups [--cleanupcnt];
4625 ev_active (cleanups [active - 1]) = active;
4626 }
4627
4628 ev_stop (EV_A_ (W)w);
4629
4630 EV_FREQUENT_CHECK;
4631}
4632#endif
4633
3157#if EV_ASYNC_ENABLE 4634#if EV_ASYNC_ENABLE
3158void 4635void
3159ev_async_start (EV_P_ ev_async *w) 4636ev_async_start (EV_P_ ev_async *w) EV_THROW
3160{ 4637{
3161 if (expect_false (ev_is_active (w))) 4638 if (expect_false (ev_is_active (w)))
3162 return; 4639 return;
4640
4641 w->sent = 0;
3163 4642
3164 evpipe_init (EV_A); 4643 evpipe_init (EV_A);
3165 4644
3166 EV_FREQUENT_CHECK; 4645 EV_FREQUENT_CHECK;
3167 4646
… …
3171 4650
3172 EV_FREQUENT_CHECK; 4651 EV_FREQUENT_CHECK;
3173} 4652}
3174 4653
3175void 4654void
3176ev_async_stop (EV_P_ ev_async *w) 4655ev_async_stop (EV_P_ ev_async *w) EV_THROW
3177{ 4656{
3178 clear_pending (EV_A_ (W)w); 4657 clear_pending (EV_A_ (W)w);
3179 if (expect_false (!ev_is_active (w))) 4658 if (expect_false (!ev_is_active (w)))
3180 return; 4659 return;
3181 4660
… …
3192 4671
3193 EV_FREQUENT_CHECK; 4672 EV_FREQUENT_CHECK;
3194} 4673}
3195 4674
3196void 4675void
3197ev_async_send (EV_P_ ev_async *w) 4676ev_async_send (EV_P_ ev_async *w) EV_THROW
3198{ 4677{
3199 w->sent = 1; 4678 w->sent = 1;
3200 evpipe_write (EV_A_ &gotasync); 4679 evpipe_write (EV_A_ &async_pending);
3201} 4680}
3202#endif 4681#endif
3203 4682
3204/*****************************************************************************/ 4683/*****************************************************************************/
3205 4684
… …
3239 4718
3240 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4719 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3241} 4720}
3242 4721
3243void 4722void
3244ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4723ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3245{ 4724{
3246 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4725 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3247 4726
3248 if (expect_false (!once)) 4727 if (expect_false (!once))
3249 { 4728 {
3250 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4729 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3251 return; 4730 return;
3252 } 4731 }
3253 4732
3254 once->cb = cb; 4733 once->cb = cb;
3255 once->arg = arg; 4734 once->arg = arg;
… …
3270} 4749}
3271 4750
3272/*****************************************************************************/ 4751/*****************************************************************************/
3273 4752
3274#if EV_WALK_ENABLE 4753#if EV_WALK_ENABLE
3275void 4754void ecb_cold
3276ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4755ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3277{ 4756{
3278 int i, j; 4757 int i, j;
3279 ev_watcher_list *wl, *wn; 4758 ev_watcher_list *wl, *wn;
3280 4759
3281 if (types & (EV_IO | EV_EMBED)) 4760 if (types & (EV_IO | EV_EMBED))
… …
3324 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4803 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3325#endif 4804#endif
3326 4805
3327#if EV_IDLE_ENABLE 4806#if EV_IDLE_ENABLE
3328 if (types & EV_IDLE) 4807 if (types & EV_IDLE)
3329 for (j = NUMPRI; i--; ) 4808 for (j = NUMPRI; j--; )
3330 for (i = idlecnt [j]; i--; ) 4809 for (i = idlecnt [j]; i--; )
3331 cb (EV_A_ EV_IDLE, idles [j][i]); 4810 cb (EV_A_ EV_IDLE, idles [j][i]);
3332#endif 4811#endif
3333 4812
3334#if EV_FORK_ENABLE 4813#if EV_FORK_ENABLE
… …
3342 if (types & EV_ASYNC) 4821 if (types & EV_ASYNC)
3343 for (i = asynccnt; i--; ) 4822 for (i = asynccnt; i--; )
3344 cb (EV_A_ EV_ASYNC, asyncs [i]); 4823 cb (EV_A_ EV_ASYNC, asyncs [i]);
3345#endif 4824#endif
3346 4825
4826#if EV_PREPARE_ENABLE
3347 if (types & EV_PREPARE) 4827 if (types & EV_PREPARE)
3348 for (i = preparecnt; i--; ) 4828 for (i = preparecnt; i--; )
3349#if EV_EMBED_ENABLE 4829# if EV_EMBED_ENABLE
3350 if (ev_cb (prepares [i]) != embed_prepare_cb) 4830 if (ev_cb (prepares [i]) != embed_prepare_cb)
3351#endif 4831# endif
3352 cb (EV_A_ EV_PREPARE, prepares [i]); 4832 cb (EV_A_ EV_PREPARE, prepares [i]);
4833#endif
3353 4834
4835#if EV_CHECK_ENABLE
3354 if (types & EV_CHECK) 4836 if (types & EV_CHECK)
3355 for (i = checkcnt; i--; ) 4837 for (i = checkcnt; i--; )
3356 cb (EV_A_ EV_CHECK, checks [i]); 4838 cb (EV_A_ EV_CHECK, checks [i]);
4839#endif
3357 4840
4841#if EV_SIGNAL_ENABLE
3358 if (types & EV_SIGNAL) 4842 if (types & EV_SIGNAL)
3359 for (i = 0; i < signalmax; ++i) 4843 for (i = 0; i < EV_NSIG - 1; ++i)
3360 for (wl = signals [i].head; wl; ) 4844 for (wl = signals [i].head; wl; )
3361 { 4845 {
3362 wn = wl->next; 4846 wn = wl->next;
3363 cb (EV_A_ EV_SIGNAL, wl); 4847 cb (EV_A_ EV_SIGNAL, wl);
3364 wl = wn; 4848 wl = wn;
3365 } 4849 }
4850#endif
3366 4851
4852#if EV_CHILD_ENABLE
3367 if (types & EV_CHILD) 4853 if (types & EV_CHILD)
3368 for (i = EV_PID_HASHSIZE; i--; ) 4854 for (i = (EV_PID_HASHSIZE); i--; )
3369 for (wl = childs [i]; wl; ) 4855 for (wl = childs [i]; wl; )
3370 { 4856 {
3371 wn = wl->next; 4857 wn = wl->next;
3372 cb (EV_A_ EV_CHILD, wl); 4858 cb (EV_A_ EV_CHILD, wl);
3373 wl = wn; 4859 wl = wn;
3374 } 4860 }
4861#endif
3375/* EV_STAT 0x00001000 /* stat data changed */ 4862/* EV_STAT 0x00001000 /* stat data changed */
3376/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4863/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3377} 4864}
3378#endif 4865#endif
3379 4866
3380#if EV_MULTIPLICITY 4867#if EV_MULTIPLICITY
3381 #include "ev_wrap.h" 4868 #include "ev_wrap.h"
3382#endif 4869#endif
3383 4870
3384#ifdef __cplusplus
3385}
3386#endif
3387

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