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Comparing libev/ev.c (file contents):
Revision 1.299 by root, Tue Jul 14 00:09:59 2009 UTC vs.
Revision 1.467 by root, Fri May 16 15:15:39 2014 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009 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 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
522 */
523
524#ifndef ECB_H
525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
529
530#ifdef _WIN32
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
375#if __GNUC__ >= 4 537 #if __GNUC__
376# define expect(expr,value) __builtin_expect ((expr),(value)) 538 typedef signed long long int64_t;
377# define noinline __attribute__ ((noinline)) 539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
543 #endif
544 #ifdef _WIN64
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
378#else 553#else
379# define expect(expr,value) (expr) 554 #include <inttypes.h>
380# define noinline 555 #if UINTMAX_MAX > 0xffffffffU
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 556 #define ECB_PTRSIZE 8
382# define inline 557 #else
558 #define ECB_PTRSIZE 4
559 #endif
383# endif 560#endif
561
562/* work around x32 idiocy by defining proper macros */
563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
384#endif 568 #endif
569#endif
385 570
571/* many compilers define _GNUC_ to some versions but then only implement
572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
577 */
578#ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
581 #else
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
583 #endif
584#endif
585
586#define ECB_CPP (__cplusplus+0)
587#define ECB_CPP11 (__cplusplus >= 201103L)
588
589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
596
597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
609
610/*****************************************************************************/
611
612/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
614
615#if ECB_NO_THREADS
616 #define ECB_NO_SMP 1
617#endif
618
619#if ECB_NO_SMP
620 #define ECB_MEMORY_FENCE do { } while (0)
621#endif
622
623#ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #endif
667 #endif
668#endif
669
670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
701 #elif defined _WIN32
702 #include <WinNT.h>
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
709 #elif __xlC__
710 #define ECB_MEMORY_FENCE __sync ()
711 #endif
712#endif
713
714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
733 /*
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
738 * of your system.
739 */
740 #include <pthread.h>
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
743
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
746 #endif
747#endif
748
749#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
751#endif
752
753#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif
756
757/*****************************************************************************/
758
759#if __cplusplus
760 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
763#elif ECB_C99
764 #define ecb_inline static inline
765#else
766 #define ecb_inline static
767#endif
768
769#if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
771#elif ECB_C99
772 #define ecb_restrict restrict
773#else
774 #define ecb_restrict
775#endif
776
777typedef int ecb_bool;
778
779#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a
782#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
783
784#define ecb_function_ ecb_inline
785
786#if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
801#endif
802
803/* no emulation for ecb_decltype */
804#if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806#elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
808#endif
809
810#define ecb_noinline ecb_attribute ((__noinline__))
811#define ecb_unused ecb_attribute ((__unused__))
812#define ecb_const ecb_attribute ((__const__))
813#define ecb_pure ecb_attribute ((__pure__))
814
815#if ECB_C11
816 #define ecb_noreturn _Noreturn
817#else
818 #define ecb_noreturn ecb_attribute ((__noreturn__))
819#endif
820
821#if ECB_GCC_VERSION(4,3)
822 #define ecb_artificial ecb_attribute ((__artificial__))
823 #define ecb_hot ecb_attribute ((__hot__))
824 #define ecb_cold ecb_attribute ((__cold__))
825#else
826 #define ecb_artificial
827 #define ecb_hot
828 #define ecb_cold
829#endif
830
831/* put around conditional expressions if you are very sure that the */
832/* expression is mostly true or mostly false. note that these return */
833/* booleans, not the expression. */
386#define expect_false(expr) expect ((expr) != 0, 0) 834#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
387#define expect_true(expr) expect ((expr) != 0, 1) 835#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
836/* for compatibility to the rest of the world */
837#define ecb_likely(expr) ecb_expect_true (expr)
838#define ecb_unlikely(expr) ecb_expect_false (expr)
839
840/* count trailing zero bits and count # of one bits */
841#if ECB_GCC_VERSION(3,4)
842 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
843 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
844 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
845 #define ecb_ctz32(x) __builtin_ctz (x)
846 #define ecb_ctz64(x) __builtin_ctzll (x)
847 #define ecb_popcount32(x) __builtin_popcount (x)
848 /* no popcountll */
849#else
850 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
851 ecb_function_ int
852 ecb_ctz32 (uint32_t x)
853 {
854 int r = 0;
855
856 x &= ~x + 1; /* this isolates the lowest bit */
857
858#if ECB_branchless_on_i386
859 r += !!(x & 0xaaaaaaaa) << 0;
860 r += !!(x & 0xcccccccc) << 1;
861 r += !!(x & 0xf0f0f0f0) << 2;
862 r += !!(x & 0xff00ff00) << 3;
863 r += !!(x & 0xffff0000) << 4;
864#else
865 if (x & 0xaaaaaaaa) r += 1;
866 if (x & 0xcccccccc) r += 2;
867 if (x & 0xf0f0f0f0) r += 4;
868 if (x & 0xff00ff00) r += 8;
869 if (x & 0xffff0000) r += 16;
870#endif
871
872 return r;
873 }
874
875 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
876 ecb_function_ int
877 ecb_ctz64 (uint64_t x)
878 {
879 int shift = x & 0xffffffffU ? 0 : 32;
880 return ecb_ctz32 (x >> shift) + shift;
881 }
882
883 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
884 ecb_function_ int
885 ecb_popcount32 (uint32_t x)
886 {
887 x -= (x >> 1) & 0x55555555;
888 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
889 x = ((x >> 4) + x) & 0x0f0f0f0f;
890 x *= 0x01010101;
891
892 return x >> 24;
893 }
894
895 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
896 ecb_function_ int ecb_ld32 (uint32_t x)
897 {
898 int r = 0;
899
900 if (x >> 16) { x >>= 16; r += 16; }
901 if (x >> 8) { x >>= 8; r += 8; }
902 if (x >> 4) { x >>= 4; r += 4; }
903 if (x >> 2) { x >>= 2; r += 2; }
904 if (x >> 1) { r += 1; }
905
906 return r;
907 }
908
909 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
910 ecb_function_ int ecb_ld64 (uint64_t x)
911 {
912 int r = 0;
913
914 if (x >> 32) { x >>= 32; r += 32; }
915
916 return r + ecb_ld32 (x);
917 }
918#endif
919
920ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
921ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
922ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
923ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
924
925ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
926ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
927{
928 return ( (x * 0x0802U & 0x22110U)
929 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
930}
931
932ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
933ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
934{
935 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
936 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
937 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
938 x = ( x >> 8 ) | ( x << 8);
939
940 return x;
941}
942
943ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
944ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
945{
946 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
947 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
948 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
949 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
950 x = ( x >> 16 ) | ( x << 16);
951
952 return x;
953}
954
955/* popcount64 is only available on 64 bit cpus as gcc builtin */
956/* so for this version we are lazy */
957ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
958ecb_function_ int
959ecb_popcount64 (uint64_t x)
960{
961 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
962}
963
964ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
965ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
966ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
967ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
968ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
969ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
970ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
971ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
972
973ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
974ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
975ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
976ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
977ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
978ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
979ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
980ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
981
982#if ECB_GCC_VERSION(4,3)
983 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
984 #define ecb_bswap32(x) __builtin_bswap32 (x)
985 #define ecb_bswap64(x) __builtin_bswap64 (x)
986#else
987 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
988 ecb_function_ uint16_t
989 ecb_bswap16 (uint16_t x)
990 {
991 return ecb_rotl16 (x, 8);
992 }
993
994 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
995 ecb_function_ uint32_t
996 ecb_bswap32 (uint32_t x)
997 {
998 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
999 }
1000
1001 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1002 ecb_function_ uint64_t
1003 ecb_bswap64 (uint64_t x)
1004 {
1005 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1006 }
1007#endif
1008
1009#if ECB_GCC_VERSION(4,5)
1010 #define ecb_unreachable() __builtin_unreachable ()
1011#else
1012 /* this seems to work fine, but gcc always emits a warning for it :/ */
1013 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1014 ecb_inline void ecb_unreachable (void) { }
1015#endif
1016
1017/* try to tell the compiler that some condition is definitely true */
1018#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1019
1020ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1021ecb_inline unsigned char
1022ecb_byteorder_helper (void)
1023{
1024 /* the union code still generates code under pressure in gcc, */
1025 /* but less than using pointers, and always seems to */
1026 /* successfully return a constant. */
1027 /* the reason why we have this horrible preprocessor mess */
1028 /* is to avoid it in all cases, at least on common architectures */
1029 /* or when using a recent enough gcc version (>= 4.6) */
1030#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1031 return 0x44;
1032#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1033 return 0x44;
1034#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1035 return 0x11;
1036#else
1037 union
1038 {
1039 uint32_t i;
1040 uint8_t c;
1041 } u = { 0x11223344 };
1042 return u.c;
1043#endif
1044}
1045
1046ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1047ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1048ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1049ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1050
1051#if ECB_GCC_VERSION(3,0) || ECB_C99
1052 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1053#else
1054 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1055#endif
1056
1057#if __cplusplus
1058 template<typename T>
1059 static inline T ecb_div_rd (T val, T div)
1060 {
1061 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1062 }
1063 template<typename T>
1064 static inline T ecb_div_ru (T val, T div)
1065 {
1066 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1067 }
1068#else
1069 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1070 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1071#endif
1072
1073#if ecb_cplusplus_does_not_suck
1074 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1075 template<typename T, int N>
1076 static inline int ecb_array_length (const T (&arr)[N])
1077 {
1078 return N;
1079 }
1080#else
1081 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1082#endif
1083
1084/*******************************************************************************/
1085/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1086
1087/* basically, everything uses "ieee pure-endian" floating point numbers */
1088/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1089#if 0 \
1090 || __i386 || __i386__ \
1091 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1092 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1093 || defined __s390__ || defined __s390x__ \
1094 || defined __mips__ \
1095 || defined __alpha__ \
1096 || defined __hppa__ \
1097 || defined __ia64__ \
1098 || defined __m68k__ \
1099 || defined __m88k__ \
1100 || defined __sh__ \
1101 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1102 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1103 || defined __aarch64__
1104 #define ECB_STDFP 1
1105 #include <string.h> /* for memcpy */
1106#else
1107 #define ECB_STDFP 0
1108#endif
1109
1110#ifndef ECB_NO_LIBM
1111
1112 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1113
1114 /* only the oldest of old doesn't have this one. solaris. */
1115 #ifdef INFINITY
1116 #define ECB_INFINITY INFINITY
1117 #else
1118 #define ECB_INFINITY HUGE_VAL
1119 #endif
1120
1121 #ifdef NAN
1122 #define ECB_NAN NAN
1123 #else
1124 #define ECB_NAN ECB_INFINITY
1125 #endif
1126
1127 /* converts an ieee half/binary16 to a float */
1128 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1129 ecb_function_ float
1130 ecb_binary16_to_float (uint16_t x)
1131 {
1132 int e = (x >> 10) & 0x1f;
1133 int m = x & 0x3ff;
1134 float r;
1135
1136 if (!e ) r = ldexpf (m , -24);
1137 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1138 else if (m ) r = ECB_NAN;
1139 else r = ECB_INFINITY;
1140
1141 return x & 0x8000 ? -r : r;
1142 }
1143
1144 /* convert a float to ieee single/binary32 */
1145 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1146 ecb_function_ uint32_t
1147 ecb_float_to_binary32 (float x)
1148 {
1149 uint32_t r;
1150
1151 #if ECB_STDFP
1152 memcpy (&r, &x, 4);
1153 #else
1154 /* slow emulation, works for anything but -0 */
1155 uint32_t m;
1156 int e;
1157
1158 if (x == 0e0f ) return 0x00000000U;
1159 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1160 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1161 if (x != x ) return 0x7fbfffffU;
1162
1163 m = frexpf (x, &e) * 0x1000000U;
1164
1165 r = m & 0x80000000U;
1166
1167 if (r)
1168 m = -m;
1169
1170 if (e <= -126)
1171 {
1172 m &= 0xffffffU;
1173 m >>= (-125 - e);
1174 e = -126;
1175 }
1176
1177 r |= (e + 126) << 23;
1178 r |= m & 0x7fffffU;
1179 #endif
1180
1181 return r;
1182 }
1183
1184 /* converts an ieee single/binary32 to a float */
1185 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1186 ecb_function_ float
1187 ecb_binary32_to_float (uint32_t x)
1188 {
1189 float r;
1190
1191 #if ECB_STDFP
1192 memcpy (&r, &x, 4);
1193 #else
1194 /* emulation, only works for normals and subnormals and +0 */
1195 int neg = x >> 31;
1196 int e = (x >> 23) & 0xffU;
1197
1198 x &= 0x7fffffU;
1199
1200 if (e)
1201 x |= 0x800000U;
1202 else
1203 e = 1;
1204
1205 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1206 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1207
1208 r = neg ? -r : r;
1209 #endif
1210
1211 return r;
1212 }
1213
1214 /* convert a double to ieee double/binary64 */
1215 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1216 ecb_function_ uint64_t
1217 ecb_double_to_binary64 (double x)
1218 {
1219 uint64_t r;
1220
1221 #if ECB_STDFP
1222 memcpy (&r, &x, 8);
1223 #else
1224 /* slow emulation, works for anything but -0 */
1225 uint64_t m;
1226 int e;
1227
1228 if (x == 0e0 ) return 0x0000000000000000U;
1229 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1230 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1231 if (x != x ) return 0X7ff7ffffffffffffU;
1232
1233 m = frexp (x, &e) * 0x20000000000000U;
1234
1235 r = m & 0x8000000000000000;;
1236
1237 if (r)
1238 m = -m;
1239
1240 if (e <= -1022)
1241 {
1242 m &= 0x1fffffffffffffU;
1243 m >>= (-1021 - e);
1244 e = -1022;
1245 }
1246
1247 r |= ((uint64_t)(e + 1022)) << 52;
1248 r |= m & 0xfffffffffffffU;
1249 #endif
1250
1251 return r;
1252 }
1253
1254 /* converts an ieee double/binary64 to a double */
1255 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1256 ecb_function_ double
1257 ecb_binary64_to_double (uint64_t x)
1258 {
1259 double r;
1260
1261 #if ECB_STDFP
1262 memcpy (&r, &x, 8);
1263 #else
1264 /* emulation, only works for normals and subnormals and +0 */
1265 int neg = x >> 63;
1266 int e = (x >> 52) & 0x7ffU;
1267
1268 x &= 0xfffffffffffffU;
1269
1270 if (e)
1271 x |= 0x10000000000000U;
1272 else
1273 e = 1;
1274
1275 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1276 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1277
1278 r = neg ? -r : r;
1279 #endif
1280
1281 return r;
1282 }
1283
1284#endif
1285
1286#endif
1287
1288/* ECB.H END */
1289
1290#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1291/* if your architecture doesn't need memory fences, e.g. because it is
1292 * single-cpu/core, or if you use libev in a project that doesn't use libev
1293 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1294 * libev, in which cases the memory fences become nops.
1295 * alternatively, you can remove this #error and link against libpthread,
1296 * which will then provide the memory fences.
1297 */
1298# error "memory fences not defined for your architecture, please report"
1299#endif
1300
1301#ifndef ECB_MEMORY_FENCE
1302# define ECB_MEMORY_FENCE do { } while (0)
1303# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1304# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1305#endif
1306
1307#define expect_false(cond) ecb_expect_false (cond)
1308#define expect_true(cond) ecb_expect_true (cond)
1309#define noinline ecb_noinline
1310
388#define inline_size static inline 1311#define inline_size ecb_inline
389 1312
390#if EV_MINIMAL 1313#if EV_FEATURE_CODE
1314# define inline_speed ecb_inline
1315#else
391# define inline_speed static noinline 1316# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif 1317#endif
395 1318
396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1319#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397 1320
398#if EV_MINPRI == EV_MAXPRI 1321#if EV_MINPRI == EV_MAXPRI
… …
411#define ev_active(w) ((W)(w))->active 1334#define ev_active(w) ((W)(w))->active
412#define ev_at(w) ((WT)(w))->at 1335#define ev_at(w) ((WT)(w))->at
413 1336
414#if EV_USE_REALTIME 1337#if EV_USE_REALTIME
415/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1338/* 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 */ 1339/* giving it a reasonably high chance of working on typical architectures */
417static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1340static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
418#endif 1341#endif
419 1342
420#if EV_USE_MONOTONIC 1343#if EV_USE_MONOTONIC
421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
422#endif 1345#endif
423 1346
1347#ifndef EV_FD_TO_WIN32_HANDLE
1348# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1349#endif
1350#ifndef EV_WIN32_HANDLE_TO_FD
1351# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1352#endif
1353#ifndef EV_WIN32_CLOSE_FD
1354# define EV_WIN32_CLOSE_FD(fd) close (fd)
1355#endif
1356
424#ifdef _WIN32 1357#ifdef _WIN32
425# include "ev_win32.c" 1358# include "ev_win32.c"
426#endif 1359#endif
427 1360
428/*****************************************************************************/ 1361/*****************************************************************************/
429 1362
1363/* define a suitable floor function (only used by periodics atm) */
1364
1365#if EV_USE_FLOOR
1366# include <math.h>
1367# define ev_floor(v) floor (v)
1368#else
1369
1370#include <float.h>
1371
1372/* a floor() replacement function, should be independent of ev_tstamp type */
1373static ev_tstamp noinline
1374ev_floor (ev_tstamp v)
1375{
1376 /* the choice of shift factor is not terribly important */
1377#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1378 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1379#else
1380 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1381#endif
1382
1383 /* argument too large for an unsigned long? */
1384 if (expect_false (v >= shift))
1385 {
1386 ev_tstamp f;
1387
1388 if (v == v - 1.)
1389 return v; /* very large number */
1390
1391 f = shift * ev_floor (v * (1. / shift));
1392 return f + ev_floor (v - f);
1393 }
1394
1395 /* special treatment for negative args? */
1396 if (expect_false (v < 0.))
1397 {
1398 ev_tstamp f = -ev_floor (-v);
1399
1400 return f - (f == v ? 0 : 1);
1401 }
1402
1403 /* fits into an unsigned long */
1404 return (unsigned long)v;
1405}
1406
1407#endif
1408
1409/*****************************************************************************/
1410
1411#ifdef __linux
1412# include <sys/utsname.h>
1413#endif
1414
1415static unsigned int noinline ecb_cold
1416ev_linux_version (void)
1417{
1418#ifdef __linux
1419 unsigned int v = 0;
1420 struct utsname buf;
1421 int i;
1422 char *p = buf.release;
1423
1424 if (uname (&buf))
1425 return 0;
1426
1427 for (i = 3+1; --i; )
1428 {
1429 unsigned int c = 0;
1430
1431 for (;;)
1432 {
1433 if (*p >= '0' && *p <= '9')
1434 c = c * 10 + *p++ - '0';
1435 else
1436 {
1437 p += *p == '.';
1438 break;
1439 }
1440 }
1441
1442 v = (v << 8) | c;
1443 }
1444
1445 return v;
1446#else
1447 return 0;
1448#endif
1449}
1450
1451/*****************************************************************************/
1452
1453#if EV_AVOID_STDIO
1454static void noinline ecb_cold
1455ev_printerr (const char *msg)
1456{
1457 write (STDERR_FILENO, msg, strlen (msg));
1458}
1459#endif
1460
430static void (*syserr_cb)(const char *msg); 1461static void (*syserr_cb)(const char *msg) EV_THROW;
431 1462
432void 1463void ecb_cold
433ev_set_syserr_cb (void (*cb)(const char *msg)) 1464ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
434{ 1465{
435 syserr_cb = cb; 1466 syserr_cb = cb;
436} 1467}
437 1468
438static void noinline 1469static void noinline ecb_cold
439ev_syserr (const char *msg) 1470ev_syserr (const char *msg)
440{ 1471{
441 if (!msg) 1472 if (!msg)
442 msg = "(libev) system error"; 1473 msg = "(libev) system error";
443 1474
444 if (syserr_cb) 1475 if (syserr_cb)
445 syserr_cb (msg); 1476 syserr_cb (msg);
446 else 1477 else
447 { 1478 {
1479#if EV_AVOID_STDIO
1480 ev_printerr (msg);
1481 ev_printerr (": ");
1482 ev_printerr (strerror (errno));
1483 ev_printerr ("\n");
1484#else
448 perror (msg); 1485 perror (msg);
1486#endif
449 abort (); 1487 abort ();
450 } 1488 }
451} 1489}
452 1490
453static void * 1491static void *
454ev_realloc_emul (void *ptr, long size) 1492ev_realloc_emul (void *ptr, long size) EV_THROW
455{ 1493{
456 /* some systems, notably openbsd and darwin, fail to properly 1494 /* some systems, notably openbsd and darwin, fail to properly
457 * implement realloc (x, 0) (as required by both ansi c-98 and 1495 * implement realloc (x, 0) (as required by both ansi c-89 and
458 * the single unix specification, so work around them here. 1496 * the single unix specification, so work around them here.
1497 * recently, also (at least) fedora and debian started breaking it,
1498 * despite documenting it otherwise.
459 */ 1499 */
460 1500
461 if (size) 1501 if (size)
462 return realloc (ptr, size); 1502 return realloc (ptr, size);
463 1503
464 free (ptr); 1504 free (ptr);
465 return 0; 1505 return 0;
466} 1506}
467 1507
468static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1508static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
469 1509
470void 1510void ecb_cold
471ev_set_allocator (void *(*cb)(void *ptr, long size)) 1511ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
472{ 1512{
473 alloc = cb; 1513 alloc = cb;
474} 1514}
475 1515
476inline_speed void * 1516inline_speed void *
… …
478{ 1518{
479 ptr = alloc (ptr, size); 1519 ptr = alloc (ptr, size);
480 1520
481 if (!ptr && size) 1521 if (!ptr && size)
482 { 1522 {
1523#if EV_AVOID_STDIO
1524 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1525#else
483 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1526 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1527#endif
484 abort (); 1528 abort ();
485 } 1529 }
486 1530
487 return ptr; 1531 return ptr;
488} 1532}
… …
504 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1548 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
505 unsigned char unused; 1549 unsigned char unused;
506#if EV_USE_EPOLL 1550#if EV_USE_EPOLL
507 unsigned int egen; /* generation counter to counter epoll bugs */ 1551 unsigned int egen; /* generation counter to counter epoll bugs */
508#endif 1552#endif
509#if EV_SELECT_IS_WINSOCKET 1553#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
510 SOCKET handle; 1554 SOCKET handle;
1555#endif
1556#if EV_USE_IOCP
1557 OVERLAPPED or, ow;
511#endif 1558#endif
512} ANFD; 1559} ANFD;
513 1560
514/* stores the pending event set for a given watcher */ 1561/* stores the pending event set for a given watcher */
515typedef struct 1562typedef struct
… …
557 #undef VAR 1604 #undef VAR
558 }; 1605 };
559 #include "ev_wrap.h" 1606 #include "ev_wrap.h"
560 1607
561 static struct ev_loop default_loop_struct; 1608 static struct ev_loop default_loop_struct;
562 struct ev_loop *ev_default_loop_ptr; 1609 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
563 1610
564#else 1611#else
565 1612
566 ev_tstamp ev_rt_now; 1613 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
567 #define VAR(name,decl) static decl; 1614 #define VAR(name,decl) static decl;
568 #include "ev_vars.h" 1615 #include "ev_vars.h"
569 #undef VAR 1616 #undef VAR
570 1617
571 static int ev_default_loop_ptr; 1618 static int ev_default_loop_ptr;
572 1619
573#endif 1620#endif
574 1621
575#if EV_MINIMAL < 2 1622#if EV_FEATURE_API
576# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1623# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
577# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 1624# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
578# define EV_INVOKE_PENDING invoke_cb (EV_A) 1625# define EV_INVOKE_PENDING invoke_cb (EV_A)
579#else 1626#else
580# define EV_RELEASE_CB (void)0 1627# define EV_RELEASE_CB (void)0
581# define EV_ACQUIRE_CB (void)0 1628# define EV_ACQUIRE_CB (void)0
582# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1629# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
583#endif 1630#endif
584 1631
585#define EVUNLOOP_RECURSE 0x80 1632#define EVBREAK_RECURSE 0x80
586 1633
587/*****************************************************************************/ 1634/*****************************************************************************/
588 1635
589#ifndef EV_HAVE_EV_TIME 1636#ifndef EV_HAVE_EV_TIME
590ev_tstamp 1637ev_tstamp
591ev_time (void) 1638ev_time (void) EV_THROW
592{ 1639{
593#if EV_USE_REALTIME 1640#if EV_USE_REALTIME
594 if (expect_true (have_realtime)) 1641 if (expect_true (have_realtime))
595 { 1642 {
596 struct timespec ts; 1643 struct timespec ts;
… …
620 return ev_time (); 1667 return ev_time ();
621} 1668}
622 1669
623#if EV_MULTIPLICITY 1670#if EV_MULTIPLICITY
624ev_tstamp 1671ev_tstamp
625ev_now (EV_P) 1672ev_now (EV_P) EV_THROW
626{ 1673{
627 return ev_rt_now; 1674 return ev_rt_now;
628} 1675}
629#endif 1676#endif
630 1677
631void 1678void
632ev_sleep (ev_tstamp delay) 1679ev_sleep (ev_tstamp delay) EV_THROW
633{ 1680{
634 if (delay > 0.) 1681 if (delay > 0.)
635 { 1682 {
636#if EV_USE_NANOSLEEP 1683#if EV_USE_NANOSLEEP
637 struct timespec ts; 1684 struct timespec ts;
638 1685
639 ts.tv_sec = (time_t)delay; 1686 EV_TS_SET (ts, delay);
640 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
641
642 nanosleep (&ts, 0); 1687 nanosleep (&ts, 0);
643#elif defined(_WIN32) 1688#elif defined _WIN32
644 Sleep ((unsigned long)(delay * 1e3)); 1689 Sleep ((unsigned long)(delay * 1e3));
645#else 1690#else
646 struct timeval tv; 1691 struct timeval tv;
647 1692
648 tv.tv_sec = (time_t)delay;
649 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
650
651 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1693 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
652 /* somehting not guaranteed by newer posix versions, but guaranteed */ 1694 /* something not guaranteed by newer posix versions, but guaranteed */
653 /* by older ones */ 1695 /* by older ones */
1696 EV_TV_SET (tv, delay);
654 select (0, 0, 0, 0, &tv); 1697 select (0, 0, 0, 0, &tv);
655#endif 1698#endif
656 } 1699 }
657} 1700}
658 1701
659/*****************************************************************************/ 1702/*****************************************************************************/
660 1703
661#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1704#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
662 1705
663/* find a suitable new size for the given array, */ 1706/* find a suitable new size for the given array, */
664/* hopefully by rounding to a ncie-to-malloc size */ 1707/* hopefully by rounding to a nice-to-malloc size */
665inline_size int 1708inline_size int
666array_nextsize (int elem, int cur, int cnt) 1709array_nextsize (int elem, int cur, int cnt)
667{ 1710{
668 int ncur = cur + 1; 1711 int ncur = cur + 1;
669 1712
670 do 1713 do
671 ncur <<= 1; 1714 ncur <<= 1;
672 while (cnt > ncur); 1715 while (cnt > ncur);
673 1716
674 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1717 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
675 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1718 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
676 { 1719 {
677 ncur *= elem; 1720 ncur *= elem;
678 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1721 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
679 ncur = ncur - sizeof (void *) * 4; 1722 ncur = ncur - sizeof (void *) * 4;
… …
681 } 1724 }
682 1725
683 return ncur; 1726 return ncur;
684} 1727}
685 1728
686static noinline void * 1729static void * noinline ecb_cold
687array_realloc (int elem, void *base, int *cur, int cnt) 1730array_realloc (int elem, void *base, int *cur, int cnt)
688{ 1731{
689 *cur = array_nextsize (elem, *cur, cnt); 1732 *cur = array_nextsize (elem, *cur, cnt);
690 return ev_realloc (base, elem * *cur); 1733 return ev_realloc (base, elem * *cur);
691} 1734}
… …
694 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1737 memset ((void *)(base), 0, sizeof (*(base)) * (count))
695 1738
696#define array_needsize(type,base,cur,cnt,init) \ 1739#define array_needsize(type,base,cur,cnt,init) \
697 if (expect_false ((cnt) > (cur))) \ 1740 if (expect_false ((cnt) > (cur))) \
698 { \ 1741 { \
699 int ocur_ = (cur); \ 1742 int ecb_unused ocur_ = (cur); \
700 (base) = (type *)array_realloc \ 1743 (base) = (type *)array_realloc \
701 (sizeof (type), (base), &(cur), (cnt)); \ 1744 (sizeof (type), (base), &(cur), (cnt)); \
702 init ((base) + (ocur_), (cur) - ocur_); \ 1745 init ((base) + (ocur_), (cur) - ocur_); \
703 } 1746 }
704 1747
… …
722pendingcb (EV_P_ ev_prepare *w, int revents) 1765pendingcb (EV_P_ ev_prepare *w, int revents)
723{ 1766{
724} 1767}
725 1768
726void noinline 1769void noinline
727ev_feed_event (EV_P_ void *w, int revents) 1770ev_feed_event (EV_P_ void *w, int revents) EV_THROW
728{ 1771{
729 W w_ = (W)w; 1772 W w_ = (W)w;
730 int pri = ABSPRI (w_); 1773 int pri = ABSPRI (w_);
731 1774
732 if (expect_false (w_->pending)) 1775 if (expect_false (w_->pending))
… …
736 w_->pending = ++pendingcnt [pri]; 1779 w_->pending = ++pendingcnt [pri];
737 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1780 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
738 pendings [pri][w_->pending - 1].w = w_; 1781 pendings [pri][w_->pending - 1].w = w_;
739 pendings [pri][w_->pending - 1].events = revents; 1782 pendings [pri][w_->pending - 1].events = revents;
740 } 1783 }
1784
1785 pendingpri = NUMPRI - 1;
741} 1786}
742 1787
743inline_speed void 1788inline_speed void
744feed_reverse (EV_P_ W w) 1789feed_reverse (EV_P_ W w)
745{ 1790{
… …
765} 1810}
766 1811
767/*****************************************************************************/ 1812/*****************************************************************************/
768 1813
769inline_speed void 1814inline_speed void
770fd_event_nc (EV_P_ int fd, int revents) 1815fd_event_nocheck (EV_P_ int fd, int revents)
771{ 1816{
772 ANFD *anfd = anfds + fd; 1817 ANFD *anfd = anfds + fd;
773 ev_io *w; 1818 ev_io *w;
774 1819
775 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1820 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
787fd_event (EV_P_ int fd, int revents) 1832fd_event (EV_P_ int fd, int revents)
788{ 1833{
789 ANFD *anfd = anfds + fd; 1834 ANFD *anfd = anfds + fd;
790 1835
791 if (expect_true (!anfd->reify)) 1836 if (expect_true (!anfd->reify))
792 fd_event_nc (EV_A_ fd, revents); 1837 fd_event_nocheck (EV_A_ fd, revents);
793} 1838}
794 1839
795void 1840void
796ev_feed_fd_event (EV_P_ int fd, int revents) 1841ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
797{ 1842{
798 if (fd >= 0 && fd < anfdmax) 1843 if (fd >= 0 && fd < anfdmax)
799 fd_event_nc (EV_A_ fd, revents); 1844 fd_event_nocheck (EV_A_ fd, revents);
800} 1845}
801 1846
802/* make sure the external fd watch events are in-sync */ 1847/* make sure the external fd watch events are in-sync */
803/* with the kernel/libev internal state */ 1848/* with the kernel/libev internal state */
804inline_size void 1849inline_size void
805fd_reify (EV_P) 1850fd_reify (EV_P)
806{ 1851{
807 int i; 1852 int i;
808 1853
1854#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1855 for (i = 0; i < fdchangecnt; ++i)
1856 {
1857 int fd = fdchanges [i];
1858 ANFD *anfd = anfds + fd;
1859
1860 if (anfd->reify & EV__IOFDSET && anfd->head)
1861 {
1862 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1863
1864 if (handle != anfd->handle)
1865 {
1866 unsigned long arg;
1867
1868 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1869
1870 /* handle changed, but fd didn't - we need to do it in two steps */
1871 backend_modify (EV_A_ fd, anfd->events, 0);
1872 anfd->events = 0;
1873 anfd->handle = handle;
1874 }
1875 }
1876 }
1877#endif
1878
809 for (i = 0; i < fdchangecnt; ++i) 1879 for (i = 0; i < fdchangecnt; ++i)
810 { 1880 {
811 int fd = fdchanges [i]; 1881 int fd = fdchanges [i];
812 ANFD *anfd = anfds + fd; 1882 ANFD *anfd = anfds + fd;
813 ev_io *w; 1883 ev_io *w;
814 1884
815 unsigned char events = 0; 1885 unsigned char o_events = anfd->events;
1886 unsigned char o_reify = anfd->reify;
816 1887
817 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1888 anfd->reify = 0;
818 events |= (unsigned char)w->events;
819 1889
820#if EV_SELECT_IS_WINSOCKET 1890 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
821 if (events)
822 { 1891 {
823 unsigned long arg; 1892 anfd->events = 0;
824 #ifdef EV_FD_TO_WIN32_HANDLE 1893
825 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1894 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
826 #else 1895 anfd->events |= (unsigned char)w->events;
827 anfd->handle = _get_osfhandle (fd); 1896
828 #endif 1897 if (o_events != anfd->events)
829 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1898 o_reify = EV__IOFDSET; /* actually |= */
830 } 1899 }
831#endif
832 1900
833 { 1901 if (o_reify & EV__IOFDSET)
834 unsigned char o_events = anfd->events;
835 unsigned char o_reify = anfd->reify;
836
837 anfd->reify = 0;
838 anfd->events = events;
839
840 if (o_events != events || o_reify & EV__IOFDSET)
841 backend_modify (EV_A_ fd, o_events, events); 1902 backend_modify (EV_A_ fd, o_events, anfd->events);
842 }
843 } 1903 }
844 1904
845 fdchangecnt = 0; 1905 fdchangecnt = 0;
846} 1906}
847 1907
… …
859 fdchanges [fdchangecnt - 1] = fd; 1919 fdchanges [fdchangecnt - 1] = fd;
860 } 1920 }
861} 1921}
862 1922
863/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
864inline_speed void 1924inline_speed void ecb_cold
865fd_kill (EV_P_ int fd) 1925fd_kill (EV_P_ int fd)
866{ 1926{
867 ev_io *w; 1927 ev_io *w;
868 1928
869 while ((w = (ev_io *)anfds [fd].head)) 1929 while ((w = (ev_io *)anfds [fd].head))
… …
871 ev_io_stop (EV_A_ w); 1931 ev_io_stop (EV_A_ w);
872 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
873 } 1933 }
874} 1934}
875 1935
876/* check whether the given fd is atcually valid, for error recovery */ 1936/* check whether the given fd is actually valid, for error recovery */
877inline_size int 1937inline_size int ecb_cold
878fd_valid (int fd) 1938fd_valid (int fd)
879{ 1939{
880#ifdef _WIN32 1940#ifdef _WIN32
881 return _get_osfhandle (fd) != -1; 1941 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
882#else 1942#else
883 return fcntl (fd, F_GETFD) != -1; 1943 return fcntl (fd, F_GETFD) != -1;
884#endif 1944#endif
885} 1945}
886 1946
887/* called on EBADF to verify fds */ 1947/* called on EBADF to verify fds */
888static void noinline 1948static void noinline ecb_cold
889fd_ebadf (EV_P) 1949fd_ebadf (EV_P)
890{ 1950{
891 int fd; 1951 int fd;
892 1952
893 for (fd = 0; fd < anfdmax; ++fd) 1953 for (fd = 0; fd < anfdmax; ++fd)
… …
895 if (!fd_valid (fd) && errno == EBADF) 1955 if (!fd_valid (fd) && errno == EBADF)
896 fd_kill (EV_A_ fd); 1956 fd_kill (EV_A_ fd);
897} 1957}
898 1958
899/* called on ENOMEM in select/poll to kill some fds and retry */ 1959/* called on ENOMEM in select/poll to kill some fds and retry */
900static void noinline 1960static void noinline ecb_cold
901fd_enomem (EV_P) 1961fd_enomem (EV_P)
902{ 1962{
903 int fd; 1963 int fd;
904 1964
905 for (fd = anfdmax; fd--; ) 1965 for (fd = anfdmax; fd--; )
906 if (anfds [fd].events) 1966 if (anfds [fd].events)
907 { 1967 {
908 fd_kill (EV_A_ fd); 1968 fd_kill (EV_A_ fd);
909 return; 1969 break;
910 } 1970 }
911} 1971}
912 1972
913/* usually called after fork if backend needs to re-arm all fds from scratch */ 1973/* usually called after fork if backend needs to re-arm all fds from scratch */
914static void noinline 1974static void noinline
… …
923 anfds [fd].emask = 0; 1983 anfds [fd].emask = 0;
924 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 1984 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
925 } 1985 }
926} 1986}
927 1987
1988/* used to prepare libev internal fd's */
1989/* this is not fork-safe */
1990inline_speed void
1991fd_intern (int fd)
1992{
1993#ifdef _WIN32
1994 unsigned long arg = 1;
1995 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1996#else
1997 fcntl (fd, F_SETFD, FD_CLOEXEC);
1998 fcntl (fd, F_SETFL, O_NONBLOCK);
1999#endif
2000}
2001
928/*****************************************************************************/ 2002/*****************************************************************************/
929 2003
930/* 2004/*
931 * the heap functions want a real array index. array index 0 uis guaranteed to not 2005 * the heap functions want a real array index. array index 0 is guaranteed to not
932 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2006 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
933 * the branching factor of the d-tree. 2007 * the branching factor of the d-tree.
934 */ 2008 */
935 2009
936/* 2010/*
… …
1004 2078
1005 for (;;) 2079 for (;;)
1006 { 2080 {
1007 int c = k << 1; 2081 int c = k << 1;
1008 2082
1009 if (c > N + HEAP0 - 1) 2083 if (c >= N + HEAP0)
1010 break; 2084 break;
1011 2085
1012 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2086 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1013 ? 1 : 0; 2087 ? 1 : 0;
1014 2088
… …
1050 2124
1051/* move an element suitably so it is in a correct place */ 2125/* move an element suitably so it is in a correct place */
1052inline_size void 2126inline_size void
1053adjustheap (ANHE *heap, int N, int k) 2127adjustheap (ANHE *heap, int N, int k)
1054{ 2128{
1055 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2129 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1056 upheap (heap, k); 2130 upheap (heap, k);
1057 else 2131 else
1058 downheap (heap, N, k); 2132 downheap (heap, N, k);
1059} 2133}
1060 2134
… …
1073/*****************************************************************************/ 2147/*****************************************************************************/
1074 2148
1075/* associate signal watchers to a signal signal */ 2149/* associate signal watchers to a signal signal */
1076typedef struct 2150typedef struct
1077{ 2151{
2152 EV_ATOMIC_T pending;
2153#if EV_MULTIPLICITY
2154 EV_P;
2155#endif
1078 WL head; 2156 WL head;
1079 EV_ATOMIC_T gotsig;
1080} ANSIG; 2157} ANSIG;
1081 2158
1082static ANSIG *signals; 2159static ANSIG signals [EV_NSIG - 1];
1083static int signalmax;
1084
1085static EV_ATOMIC_T gotsig;
1086 2160
1087/*****************************************************************************/ 2161/*****************************************************************************/
1088 2162
1089/* used to prepare libev internal fd's */ 2163#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1090/* this is not fork-safe */ 2164
2165static void noinline ecb_cold
2166evpipe_init (EV_P)
2167{
2168 if (!ev_is_active (&pipe_w))
2169 {
2170 int fds [2];
2171
2172# if EV_USE_EVENTFD
2173 fds [0] = -1;
2174 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2175 if (fds [1] < 0 && errno == EINVAL)
2176 fds [1] = eventfd (0, 0);
2177
2178 if (fds [1] < 0)
2179# endif
2180 {
2181 while (pipe (fds))
2182 ev_syserr ("(libev) error creating signal/async pipe");
2183
2184 fd_intern (fds [0]);
2185 }
2186
2187 evpipe [0] = fds [0];
2188
2189 if (evpipe [1] < 0)
2190 evpipe [1] = fds [1]; /* first call, set write fd */
2191 else
2192 {
2193 /* on subsequent calls, do not change evpipe [1] */
2194 /* so that evpipe_write can always rely on its value. */
2195 /* this branch does not do anything sensible on windows, */
2196 /* so must not be executed on windows */
2197
2198 dup2 (fds [1], evpipe [1]);
2199 close (fds [1]);
2200 }
2201
2202 fd_intern (evpipe [1]);
2203
2204 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2205 ev_io_start (EV_A_ &pipe_w);
2206 ev_unref (EV_A); /* watcher should not keep loop alive */
2207 }
2208}
2209
1091inline_speed void 2210inline_speed void
1092fd_intern (int fd) 2211evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1093{ 2212{
1094#ifdef _WIN32 2213 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1095 unsigned long arg = 1;
1096 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1097#else
1098 fcntl (fd, F_SETFD, FD_CLOEXEC);
1099 fcntl (fd, F_SETFL, O_NONBLOCK);
1100#endif
1101}
1102 2214
1103static void noinline 2215 if (expect_true (*flag))
1104evpipe_init (EV_P) 2216 return;
1105{ 2217
1106 if (!ev_is_active (&pipe_w)) 2218 *flag = 1;
2219 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2220
2221 pipe_write_skipped = 1;
2222
2223 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2224
2225 if (pipe_write_wanted)
1107 { 2226 {
2227 int old_errno;
2228
2229 pipe_write_skipped = 0;
2230 ECB_MEMORY_FENCE_RELEASE;
2231
2232 old_errno = errno; /* save errno because write will clobber it */
2233
1108#if EV_USE_EVENTFD 2234#if EV_USE_EVENTFD
1109 if ((evfd = eventfd (0, 0)) >= 0) 2235 if (evpipe [0] < 0)
1110 { 2236 {
1111 evpipe [0] = -1; 2237 uint64_t counter = 1;
1112 fd_intern (evfd); 2238 write (evpipe [1], &counter, sizeof (uint64_t));
1113 ev_io_set (&pipe_w, evfd, EV_READ);
1114 } 2239 }
1115 else 2240 else
1116#endif 2241#endif
1117 { 2242 {
1118 while (pipe (evpipe)) 2243#ifdef _WIN32
1119 ev_syserr ("(libev) error creating signal/async pipe"); 2244 WSABUF buf;
1120 2245 DWORD sent;
1121 fd_intern (evpipe [0]); 2246 buf.buf = &buf;
1122 fd_intern (evpipe [1]); 2247 buf.len = 1;
1123 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2248 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2249#else
2250 write (evpipe [1], &(evpipe [1]), 1);
2251#endif
1124 } 2252 }
1125
1126 ev_io_start (EV_A_ &pipe_w);
1127 ev_unref (EV_A); /* watcher should not keep loop alive */
1128 }
1129}
1130
1131inline_size void
1132evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1133{
1134 if (!*flag)
1135 {
1136 int old_errno = errno; /* save errno because write might clobber it */
1137
1138 *flag = 1;
1139
1140#if EV_USE_EVENTFD
1141 if (evfd >= 0)
1142 {
1143 uint64_t counter = 1;
1144 write (evfd, &counter, sizeof (uint64_t));
1145 }
1146 else
1147#endif
1148 write (evpipe [1], &old_errno, 1);
1149 2253
1150 errno = old_errno; 2254 errno = old_errno;
1151 } 2255 }
1152} 2256}
1153 2257
1154/* called whenever the libev signal pipe */ 2258/* called whenever the libev signal pipe */
1155/* got some events (signal, async) */ 2259/* got some events (signal, async) */
1156static void 2260static void
1157pipecb (EV_P_ ev_io *iow, int revents) 2261pipecb (EV_P_ ev_io *iow, int revents)
1158{ 2262{
2263 int i;
2264
2265 if (revents & EV_READ)
2266 {
1159#if EV_USE_EVENTFD 2267#if EV_USE_EVENTFD
1160 if (evfd >= 0) 2268 if (evpipe [0] < 0)
1161 { 2269 {
1162 uint64_t counter; 2270 uint64_t counter;
1163 read (evfd, &counter, sizeof (uint64_t)); 2271 read (evpipe [1], &counter, sizeof (uint64_t));
1164 } 2272 }
1165 else 2273 else
1166#endif 2274#endif
1167 { 2275 {
1168 char dummy; 2276 char dummy[4];
2277#ifdef _WIN32
2278 WSABUF buf;
2279 DWORD recvd;
2280 DWORD flags = 0;
2281 buf.buf = dummy;
2282 buf.len = sizeof (dummy);
2283 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2284#else
1169 read (evpipe [0], &dummy, 1); 2285 read (evpipe [0], &dummy, sizeof (dummy));
2286#endif
2287 }
2288 }
2289
2290 pipe_write_skipped = 0;
2291
2292 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2293
2294#if EV_SIGNAL_ENABLE
2295 if (sig_pending)
1170 } 2296 {
2297 sig_pending = 0;
1171 2298
1172 if (gotsig && ev_is_default_loop (EV_A)) 2299 ECB_MEMORY_FENCE;
1173 {
1174 int signum;
1175 gotsig = 0;
1176 2300
1177 for (signum = signalmax; signum--; ) 2301 for (i = EV_NSIG - 1; i--; )
1178 if (signals [signum].gotsig) 2302 if (expect_false (signals [i].pending))
1179 ev_feed_signal_event (EV_A_ signum + 1); 2303 ev_feed_signal_event (EV_A_ i + 1);
1180 } 2304 }
2305#endif
1181 2306
1182#if EV_ASYNC_ENABLE 2307#if EV_ASYNC_ENABLE
1183 if (gotasync) 2308 if (async_pending)
1184 { 2309 {
1185 int i; 2310 async_pending = 0;
1186 gotasync = 0; 2311
2312 ECB_MEMORY_FENCE;
1187 2313
1188 for (i = asynccnt; i--; ) 2314 for (i = asynccnt; i--; )
1189 if (asyncs [i]->sent) 2315 if (asyncs [i]->sent)
1190 { 2316 {
1191 asyncs [i]->sent = 0; 2317 asyncs [i]->sent = 0;
2318 ECB_MEMORY_FENCE_RELEASE;
1192 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2319 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1193 } 2320 }
1194 } 2321 }
1195#endif 2322#endif
1196} 2323}
1197 2324
1198/*****************************************************************************/ 2325/*****************************************************************************/
1199 2326
2327void
2328ev_feed_signal (int signum) EV_THROW
2329{
2330#if EV_MULTIPLICITY
2331 EV_P;
2332 ECB_MEMORY_FENCE_ACQUIRE;
2333 EV_A = signals [signum - 1].loop;
2334
2335 if (!EV_A)
2336 return;
2337#endif
2338
2339 signals [signum - 1].pending = 1;
2340 evpipe_write (EV_A_ &sig_pending);
2341}
2342
1200static void 2343static void
1201ev_sighandler (int signum) 2344ev_sighandler (int signum)
1202{ 2345{
2346#ifdef _WIN32
2347 signal (signum, ev_sighandler);
2348#endif
2349
2350 ev_feed_signal (signum);
2351}
2352
2353void noinline
2354ev_feed_signal_event (EV_P_ int signum) EV_THROW
2355{
2356 WL w;
2357
2358 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2359 return;
2360
2361 --signum;
2362
1203#if EV_MULTIPLICITY 2363#if EV_MULTIPLICITY
1204 struct ev_loop *loop = &default_loop_struct; 2364 /* it is permissible to try to feed a signal to the wrong loop */
1205#endif 2365 /* or, likely more useful, feeding a signal nobody is waiting for */
1206 2366
1207#if _WIN32 2367 if (expect_false (signals [signum].loop != EV_A))
1208 signal (signum, ev_sighandler);
1209#endif
1210
1211 signals [signum - 1].gotsig = 1;
1212 evpipe_write (EV_A_ &gotsig);
1213}
1214
1215void noinline
1216ev_feed_signal_event (EV_P_ int signum)
1217{
1218 WL w;
1219
1220#if EV_MULTIPLICITY
1221 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1222#endif
1223
1224 --signum;
1225
1226 if (signum < 0 || signum >= signalmax)
1227 return; 2368 return;
2369#endif
1228 2370
1229 signals [signum].gotsig = 0; 2371 signals [signum].pending = 0;
2372 ECB_MEMORY_FENCE_RELEASE;
1230 2373
1231 for (w = signals [signum].head; w; w = w->next) 2374 for (w = signals [signum].head; w; w = w->next)
1232 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2375 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1233} 2376}
1234 2377
2378#if EV_USE_SIGNALFD
2379static void
2380sigfdcb (EV_P_ ev_io *iow, int revents)
2381{
2382 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2383
2384 for (;;)
2385 {
2386 ssize_t res = read (sigfd, si, sizeof (si));
2387
2388 /* not ISO-C, as res might be -1, but works with SuS */
2389 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2390 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2391
2392 if (res < (ssize_t)sizeof (si))
2393 break;
2394 }
2395}
2396#endif
2397
2398#endif
2399
1235/*****************************************************************************/ 2400/*****************************************************************************/
1236 2401
2402#if EV_CHILD_ENABLE
1237static WL childs [EV_PID_HASHSIZE]; 2403static WL childs [EV_PID_HASHSIZE];
1238
1239#ifndef _WIN32
1240 2404
1241static ev_signal childev; 2405static ev_signal childev;
1242 2406
1243#ifndef WIFCONTINUED 2407#ifndef WIFCONTINUED
1244# define WIFCONTINUED(status) 0 2408# define WIFCONTINUED(status) 0
… …
1249child_reap (EV_P_ int chain, int pid, int status) 2413child_reap (EV_P_ int chain, int pid, int status)
1250{ 2414{
1251 ev_child *w; 2415 ev_child *w;
1252 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2416 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1253 2417
1254 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2418 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1255 { 2419 {
1256 if ((w->pid == pid || !w->pid) 2420 if ((w->pid == pid || !w->pid)
1257 && (!traced || (w->flags & 1))) 2421 && (!traced || (w->flags & 1)))
1258 { 2422 {
1259 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2423 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1284 /* make sure we are called again until all children have been reaped */ 2448 /* make sure we are called again until all children have been reaped */
1285 /* we need to do it this way so that the callback gets called before we continue */ 2449 /* we need to do it this way so that the callback gets called before we continue */
1286 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2450 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1287 2451
1288 child_reap (EV_A_ pid, pid, status); 2452 child_reap (EV_A_ pid, pid, status);
1289 if (EV_PID_HASHSIZE > 1) 2453 if ((EV_PID_HASHSIZE) > 1)
1290 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2454 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1291} 2455}
1292 2456
1293#endif 2457#endif
1294 2458
1295/*****************************************************************************/ 2459/*****************************************************************************/
1296 2460
2461#if EV_USE_IOCP
2462# include "ev_iocp.c"
2463#endif
1297#if EV_USE_PORT 2464#if EV_USE_PORT
1298# include "ev_port.c" 2465# include "ev_port.c"
1299#endif 2466#endif
1300#if EV_USE_KQUEUE 2467#if EV_USE_KQUEUE
1301# include "ev_kqueue.c" 2468# include "ev_kqueue.c"
… …
1308#endif 2475#endif
1309#if EV_USE_SELECT 2476#if EV_USE_SELECT
1310# include "ev_select.c" 2477# include "ev_select.c"
1311#endif 2478#endif
1312 2479
1313int 2480int ecb_cold
1314ev_version_major (void) 2481ev_version_major (void) EV_THROW
1315{ 2482{
1316 return EV_VERSION_MAJOR; 2483 return EV_VERSION_MAJOR;
1317} 2484}
1318 2485
1319int 2486int ecb_cold
1320ev_version_minor (void) 2487ev_version_minor (void) EV_THROW
1321{ 2488{
1322 return EV_VERSION_MINOR; 2489 return EV_VERSION_MINOR;
1323} 2490}
1324 2491
1325/* return true if we are running with elevated privileges and should ignore env variables */ 2492/* return true if we are running with elevated privileges and should ignore env variables */
1326int inline_size 2493int inline_size ecb_cold
1327enable_secure (void) 2494enable_secure (void)
1328{ 2495{
1329#ifdef _WIN32 2496#ifdef _WIN32
1330 return 0; 2497 return 0;
1331#else 2498#else
1332 return getuid () != geteuid () 2499 return getuid () != geteuid ()
1333 || getgid () != getegid (); 2500 || getgid () != getegid ();
1334#endif 2501#endif
1335} 2502}
1336 2503
1337unsigned int 2504unsigned int ecb_cold
1338ev_supported_backends (void) 2505ev_supported_backends (void) EV_THROW
1339{ 2506{
1340 unsigned int flags = 0; 2507 unsigned int flags = 0;
1341 2508
1342 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1343 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2510 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1346 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1347 2514
1348 return flags; 2515 return flags;
1349} 2516}
1350 2517
1351unsigned int 2518unsigned int ecb_cold
1352ev_recommended_backends (void) 2519ev_recommended_backends (void) EV_THROW
1353{ 2520{
1354 unsigned int flags = ev_supported_backends (); 2521 unsigned int flags = ev_supported_backends ();
1355 2522
1356#ifndef __NetBSD__ 2523#ifndef __NetBSD__
1357 /* kqueue is borked on everything but netbsd apparently */ 2524 /* kqueue is borked on everything but netbsd apparently */
… …
1361#ifdef __APPLE__ 2528#ifdef __APPLE__
1362 /* only select works correctly on that "unix-certified" platform */ 2529 /* only select works correctly on that "unix-certified" platform */
1363 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2530 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1364 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2531 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1365#endif 2532#endif
2533#ifdef __FreeBSD__
2534 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2535#endif
1366 2536
1367 return flags; 2537 return flags;
1368} 2538}
1369 2539
2540unsigned int ecb_cold
2541ev_embeddable_backends (void) EV_THROW
2542{
2543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2544
2545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2546 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2547 flags &= ~EVBACKEND_EPOLL;
2548
2549 return flags;
2550}
2551
1370unsigned int 2552unsigned int
1371ev_embeddable_backends (void) 2553ev_backend (EV_P) EV_THROW
1372{ 2554{
1373 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2555 return backend;
1374
1375 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1376 /* please fix it and tell me how to detect the fix */
1377 flags &= ~EVBACKEND_EPOLL;
1378
1379 return flags;
1380} 2556}
1381 2557
2558#if EV_FEATURE_API
1382unsigned int 2559unsigned int
1383ev_backend (EV_P) 2560ev_iteration (EV_P) EV_THROW
1384{ 2561{
1385 return backend; 2562 return loop_count;
1386} 2563}
1387 2564
1388#if EV_MINIMAL < 2
1389unsigned int 2565unsigned int
1390ev_loop_count (EV_P) 2566ev_depth (EV_P) EV_THROW
1391{
1392 return loop_count;
1393}
1394
1395unsigned int
1396ev_loop_depth (EV_P)
1397{ 2567{
1398 return loop_depth; 2568 return loop_depth;
1399} 2569}
1400 2570
1401void 2571void
1402ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2572ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1403{ 2573{
1404 io_blocktime = interval; 2574 io_blocktime = interval;
1405} 2575}
1406 2576
1407void 2577void
1408ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2578ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1409{ 2579{
1410 timeout_blocktime = interval; 2580 timeout_blocktime = interval;
1411} 2581}
1412 2582
1413void 2583void
1414ev_set_userdata (EV_P_ void *data) 2584ev_set_userdata (EV_P_ void *data) EV_THROW
1415{ 2585{
1416 userdata = data; 2586 userdata = data;
1417} 2587}
1418 2588
1419void * 2589void *
1420ev_userdata (EV_P) 2590ev_userdata (EV_P) EV_THROW
1421{ 2591{
1422 return userdata; 2592 return userdata;
1423} 2593}
1424 2594
2595void
1425void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2596ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
1426{ 2597{
1427 invoke_cb = invoke_pending_cb; 2598 invoke_cb = invoke_pending_cb;
1428} 2599}
1429 2600
1430void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2601void
2602ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
1431{ 2603{
1432 release_cb = release; 2604 release_cb = release;
1433 acquire_cb = acquire; 2605 acquire_cb = acquire;
1434} 2606}
1435#endif 2607#endif
1436 2608
1437/* initialise a loop structure, must be zero-initialised */ 2609/* initialise a loop structure, must be zero-initialised */
1438static void noinline 2610static void noinline ecb_cold
1439loop_init (EV_P_ unsigned int flags) 2611loop_init (EV_P_ unsigned int flags) EV_THROW
1440{ 2612{
1441 if (!backend) 2613 if (!backend)
1442 { 2614 {
2615 origflags = flags;
2616
1443#if EV_USE_REALTIME 2617#if EV_USE_REALTIME
1444 if (!have_realtime) 2618 if (!have_realtime)
1445 { 2619 {
1446 struct timespec ts; 2620 struct timespec ts;
1447 2621
… …
1458 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2632 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1459 have_monotonic = 1; 2633 have_monotonic = 1;
1460 } 2634 }
1461#endif 2635#endif
1462 2636
1463 ev_rt_now = ev_time ();
1464 mn_now = get_clock ();
1465 now_floor = mn_now;
1466 rtmn_diff = ev_rt_now - mn_now;
1467#if EV_MINIMAL < 2
1468 invoke_cb = ev_invoke_pending;
1469#endif
1470
1471 io_blocktime = 0.;
1472 timeout_blocktime = 0.;
1473 backend = 0;
1474 backend_fd = -1;
1475 gotasync = 0;
1476#if EV_USE_INOTIFY
1477 fs_fd = -2;
1478#endif
1479
1480 /* pid check not overridable via env */ 2637 /* pid check not overridable via env */
1481#ifndef _WIN32 2638#ifndef _WIN32
1482 if (flags & EVFLAG_FORKCHECK) 2639 if (flags & EVFLAG_FORKCHECK)
1483 curpid = getpid (); 2640 curpid = getpid ();
1484#endif 2641#endif
… …
1486 if (!(flags & EVFLAG_NOENV) 2643 if (!(flags & EVFLAG_NOENV)
1487 && !enable_secure () 2644 && !enable_secure ()
1488 && getenv ("LIBEV_FLAGS")) 2645 && getenv ("LIBEV_FLAGS"))
1489 flags = atoi (getenv ("LIBEV_FLAGS")); 2646 flags = atoi (getenv ("LIBEV_FLAGS"));
1490 2647
1491 if (!(flags & 0x0000ffffU)) 2648 ev_rt_now = ev_time ();
2649 mn_now = get_clock ();
2650 now_floor = mn_now;
2651 rtmn_diff = ev_rt_now - mn_now;
2652#if EV_FEATURE_API
2653 invoke_cb = ev_invoke_pending;
2654#endif
2655
2656 io_blocktime = 0.;
2657 timeout_blocktime = 0.;
2658 backend = 0;
2659 backend_fd = -1;
2660 sig_pending = 0;
2661#if EV_ASYNC_ENABLE
2662 async_pending = 0;
2663#endif
2664 pipe_write_skipped = 0;
2665 pipe_write_wanted = 0;
2666 evpipe [0] = -1;
2667 evpipe [1] = -1;
2668#if EV_USE_INOTIFY
2669 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2670#endif
2671#if EV_USE_SIGNALFD
2672 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2673#endif
2674
2675 if (!(flags & EVBACKEND_MASK))
1492 flags |= ev_recommended_backends (); 2676 flags |= ev_recommended_backends ();
1493 2677
2678#if EV_USE_IOCP
2679 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2680#endif
1494#if EV_USE_PORT 2681#if EV_USE_PORT
1495 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2682 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1496#endif 2683#endif
1497#if EV_USE_KQUEUE 2684#if EV_USE_KQUEUE
1498 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2685 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1507 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2694 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1508#endif 2695#endif
1509 2696
1510 ev_prepare_init (&pending_w, pendingcb); 2697 ev_prepare_init (&pending_w, pendingcb);
1511 2698
2699#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1512 ev_init (&pipe_w, pipecb); 2700 ev_init (&pipe_w, pipecb);
1513 ev_set_priority (&pipe_w, EV_MAXPRI); 2701 ev_set_priority (&pipe_w, EV_MAXPRI);
2702#endif
1514 } 2703 }
1515} 2704}
1516 2705
1517/* free up a loop structure */ 2706/* free up a loop structure */
1518static void noinline 2707void ecb_cold
1519loop_destroy (EV_P) 2708ev_loop_destroy (EV_P)
1520{ 2709{
1521 int i; 2710 int i;
1522 2711
2712#if EV_MULTIPLICITY
2713 /* mimic free (0) */
2714 if (!EV_A)
2715 return;
2716#endif
2717
2718#if EV_CLEANUP_ENABLE
2719 /* queue cleanup watchers (and execute them) */
2720 if (expect_false (cleanupcnt))
2721 {
2722 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2723 EV_INVOKE_PENDING;
2724 }
2725#endif
2726
2727#if EV_CHILD_ENABLE
2728 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2729 {
2730 ev_ref (EV_A); /* child watcher */
2731 ev_signal_stop (EV_A_ &childev);
2732 }
2733#endif
2734
1523 if (ev_is_active (&pipe_w)) 2735 if (ev_is_active (&pipe_w))
1524 { 2736 {
1525 ev_ref (EV_A); /* signal watcher */ 2737 /*ev_ref (EV_A);*/
1526 ev_io_stop (EV_A_ &pipe_w); 2738 /*ev_io_stop (EV_A_ &pipe_w);*/
1527 2739
2740 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2741 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2742 }
2743
1528#if EV_USE_EVENTFD 2744#if EV_USE_SIGNALFD
1529 if (evfd >= 0) 2745 if (ev_is_active (&sigfd_w))
1530 close (evfd); 2746 close (sigfd);
1531#endif 2747#endif
1532
1533 if (evpipe [0] >= 0)
1534 {
1535 close (evpipe [0]);
1536 close (evpipe [1]);
1537 }
1538 }
1539 2748
1540#if EV_USE_INOTIFY 2749#if EV_USE_INOTIFY
1541 if (fs_fd >= 0) 2750 if (fs_fd >= 0)
1542 close (fs_fd); 2751 close (fs_fd);
1543#endif 2752#endif
1544 2753
1545 if (backend_fd >= 0) 2754 if (backend_fd >= 0)
1546 close (backend_fd); 2755 close (backend_fd);
1547 2756
2757#if EV_USE_IOCP
2758 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2759#endif
1548#if EV_USE_PORT 2760#if EV_USE_PORT
1549 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2761 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1550#endif 2762#endif
1551#if EV_USE_KQUEUE 2763#if EV_USE_KQUEUE
1552 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2764 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1567#if EV_IDLE_ENABLE 2779#if EV_IDLE_ENABLE
1568 array_free (idle, [i]); 2780 array_free (idle, [i]);
1569#endif 2781#endif
1570 } 2782 }
1571 2783
1572 ev_free (anfds); anfdmax = 0; 2784 ev_free (anfds); anfds = 0; anfdmax = 0;
1573 2785
1574 /* have to use the microsoft-never-gets-it-right macro */ 2786 /* have to use the microsoft-never-gets-it-right macro */
1575 array_free (rfeed, EMPTY); 2787 array_free (rfeed, EMPTY);
1576 array_free (fdchange, EMPTY); 2788 array_free (fdchange, EMPTY);
1577 array_free (timer, EMPTY); 2789 array_free (timer, EMPTY);
… …
1579 array_free (periodic, EMPTY); 2791 array_free (periodic, EMPTY);
1580#endif 2792#endif
1581#if EV_FORK_ENABLE 2793#if EV_FORK_ENABLE
1582 array_free (fork, EMPTY); 2794 array_free (fork, EMPTY);
1583#endif 2795#endif
2796#if EV_CLEANUP_ENABLE
2797 array_free (cleanup, EMPTY);
2798#endif
1584 array_free (prepare, EMPTY); 2799 array_free (prepare, EMPTY);
1585 array_free (check, EMPTY); 2800 array_free (check, EMPTY);
1586#if EV_ASYNC_ENABLE 2801#if EV_ASYNC_ENABLE
1587 array_free (async, EMPTY); 2802 array_free (async, EMPTY);
1588#endif 2803#endif
1589 2804
1590 backend = 0; 2805 backend = 0;
2806
2807#if EV_MULTIPLICITY
2808 if (ev_is_default_loop (EV_A))
2809#endif
2810 ev_default_loop_ptr = 0;
2811#if EV_MULTIPLICITY
2812 else
2813 ev_free (EV_A);
2814#endif
1591} 2815}
1592 2816
1593#if EV_USE_INOTIFY 2817#if EV_USE_INOTIFY
1594inline_size void infy_fork (EV_P); 2818inline_size void infy_fork (EV_P);
1595#endif 2819#endif
… …
1608#endif 2832#endif
1609#if EV_USE_INOTIFY 2833#if EV_USE_INOTIFY
1610 infy_fork (EV_A); 2834 infy_fork (EV_A);
1611#endif 2835#endif
1612 2836
2837#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1613 if (ev_is_active (&pipe_w)) 2838 if (ev_is_active (&pipe_w))
1614 { 2839 {
1615 /* this "locks" the handlers against writing to the pipe */ 2840 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1616 /* while we modify the fd vars */
1617 gotsig = 1;
1618#if EV_ASYNC_ENABLE
1619 gotasync = 1;
1620#endif
1621 2841
1622 ev_ref (EV_A); 2842 ev_ref (EV_A);
1623 ev_io_stop (EV_A_ &pipe_w); 2843 ev_io_stop (EV_A_ &pipe_w);
1624 2844
1625#if EV_USE_EVENTFD
1626 if (evfd >= 0)
1627 close (evfd);
1628#endif
1629
1630 if (evpipe [0] >= 0) 2845 if (evpipe [0] >= 0)
1631 { 2846 EV_WIN32_CLOSE_FD (evpipe [0]);
1632 close (evpipe [0]);
1633 close (evpipe [1]);
1634 }
1635 2847
1636 evpipe_init (EV_A); 2848 evpipe_init (EV_A);
1637 /* now iterate over everything, in case we missed something */ 2849 /* iterate over everything, in case we missed something before */
1638 pipecb (EV_A_ &pipe_w, EV_READ); 2850 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1639 } 2851 }
2852#endif
1640 2853
1641 postfork = 0; 2854 postfork = 0;
1642} 2855}
1643 2856
1644#if EV_MULTIPLICITY 2857#if EV_MULTIPLICITY
1645 2858
1646struct ev_loop * 2859struct ev_loop * ecb_cold
1647ev_loop_new (unsigned int flags) 2860ev_loop_new (unsigned int flags) EV_THROW
1648{ 2861{
1649 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2862 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1650 2863
1651 memset (loop, 0, sizeof (struct ev_loop)); 2864 memset (EV_A, 0, sizeof (struct ev_loop));
1652
1653 loop_init (EV_A_ flags); 2865 loop_init (EV_A_ flags);
1654 2866
1655 if (ev_backend (EV_A)) 2867 if (ev_backend (EV_A))
1656 return loop; 2868 return EV_A;
1657 2869
2870 ev_free (EV_A);
1658 return 0; 2871 return 0;
1659} 2872}
1660 2873
1661void
1662ev_loop_destroy (EV_P)
1663{
1664 loop_destroy (EV_A);
1665 ev_free (loop);
1666}
1667
1668void
1669ev_loop_fork (EV_P)
1670{
1671 postfork = 1; /* must be in line with ev_default_fork */
1672}
1673#endif /* multiplicity */ 2874#endif /* multiplicity */
1674 2875
1675#if EV_VERIFY 2876#if EV_VERIFY
1676static void noinline 2877static void noinline ecb_cold
1677verify_watcher (EV_P_ W w) 2878verify_watcher (EV_P_ W w)
1678{ 2879{
1679 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2880 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1680 2881
1681 if (w->pending) 2882 if (w->pending)
1682 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2883 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1683} 2884}
1684 2885
1685static void noinline 2886static void noinline ecb_cold
1686verify_heap (EV_P_ ANHE *heap, int N) 2887verify_heap (EV_P_ ANHE *heap, int N)
1687{ 2888{
1688 int i; 2889 int i;
1689 2890
1690 for (i = HEAP0; i < N + HEAP0; ++i) 2891 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1695 2896
1696 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2897 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1697 } 2898 }
1698} 2899}
1699 2900
1700static void noinline 2901static void noinline ecb_cold
1701array_verify (EV_P_ W *ws, int cnt) 2902array_verify (EV_P_ W *ws, int cnt)
1702{ 2903{
1703 while (cnt--) 2904 while (cnt--)
1704 { 2905 {
1705 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2906 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1706 verify_watcher (EV_A_ ws [cnt]); 2907 verify_watcher (EV_A_ ws [cnt]);
1707 } 2908 }
1708} 2909}
1709#endif 2910#endif
1710 2911
1711#if EV_MINIMAL < 2 2912#if EV_FEATURE_API
1712void 2913void ecb_cold
1713ev_loop_verify (EV_P) 2914ev_verify (EV_P) EV_THROW
1714{ 2915{
1715#if EV_VERIFY 2916#if EV_VERIFY
1716 int i; 2917 int i;
1717 WL w; 2918 WL w, w2;
1718 2919
1719 assert (activecnt >= -1); 2920 assert (activecnt >= -1);
1720 2921
1721 assert (fdchangemax >= fdchangecnt); 2922 assert (fdchangemax >= fdchangecnt);
1722 for (i = 0; i < fdchangecnt; ++i) 2923 for (i = 0; i < fdchangecnt; ++i)
1723 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2924 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1724 2925
1725 assert (anfdmax >= 0); 2926 assert (anfdmax >= 0);
1726 for (i = 0; i < anfdmax; ++i) 2927 for (i = 0; i < anfdmax; ++i)
2928 {
2929 int j = 0;
2930
1727 for (w = anfds [i].head; w; w = w->next) 2931 for (w = w2 = anfds [i].head; w; w = w->next)
1728 { 2932 {
1729 verify_watcher (EV_A_ (W)w); 2933 verify_watcher (EV_A_ (W)w);
2934
2935 if (j++ & 1)
2936 {
2937 assert (("libev: io watcher list contains a loop", w != w2));
2938 w2 = w2->next;
2939 }
2940
1730 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1731 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1732 } 2943 }
2944 }
1733 2945
1734 assert (timermax >= timercnt); 2946 assert (timermax >= timercnt);
1735 verify_heap (EV_A_ timers, timercnt); 2947 verify_heap (EV_A_ timers, timercnt);
1736 2948
1737#if EV_PERIODIC_ENABLE 2949#if EV_PERIODIC_ENABLE
… …
1752#if EV_FORK_ENABLE 2964#if EV_FORK_ENABLE
1753 assert (forkmax >= forkcnt); 2965 assert (forkmax >= forkcnt);
1754 array_verify (EV_A_ (W *)forks, forkcnt); 2966 array_verify (EV_A_ (W *)forks, forkcnt);
1755#endif 2967#endif
1756 2968
2969#if EV_CLEANUP_ENABLE
2970 assert (cleanupmax >= cleanupcnt);
2971 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2972#endif
2973
1757#if EV_ASYNC_ENABLE 2974#if EV_ASYNC_ENABLE
1758 assert (asyncmax >= asynccnt); 2975 assert (asyncmax >= asynccnt);
1759 array_verify (EV_A_ (W *)asyncs, asynccnt); 2976 array_verify (EV_A_ (W *)asyncs, asynccnt);
1760#endif 2977#endif
1761 2978
2979#if EV_PREPARE_ENABLE
1762 assert (preparemax >= preparecnt); 2980 assert (preparemax >= preparecnt);
1763 array_verify (EV_A_ (W *)prepares, preparecnt); 2981 array_verify (EV_A_ (W *)prepares, preparecnt);
2982#endif
1764 2983
2984#if EV_CHECK_ENABLE
1765 assert (checkmax >= checkcnt); 2985 assert (checkmax >= checkcnt);
1766 array_verify (EV_A_ (W *)checks, checkcnt); 2986 array_verify (EV_A_ (W *)checks, checkcnt);
2987#endif
1767 2988
1768# if 0 2989# if 0
2990#if EV_CHILD_ENABLE
1769 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2991 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1770 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 2992 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2993#endif
1771# endif 2994# endif
1772#endif 2995#endif
1773} 2996}
1774#endif 2997#endif
1775 2998
1776#if EV_MULTIPLICITY 2999#if EV_MULTIPLICITY
1777struct ev_loop * 3000struct ev_loop * ecb_cold
1778ev_default_loop_init (unsigned int flags)
1779#else 3001#else
1780int 3002int
3003#endif
1781ev_default_loop (unsigned int flags) 3004ev_default_loop (unsigned int flags) EV_THROW
1782#endif
1783{ 3005{
1784 if (!ev_default_loop_ptr) 3006 if (!ev_default_loop_ptr)
1785 { 3007 {
1786#if EV_MULTIPLICITY 3008#if EV_MULTIPLICITY
1787 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3009 EV_P = ev_default_loop_ptr = &default_loop_struct;
1788#else 3010#else
1789 ev_default_loop_ptr = 1; 3011 ev_default_loop_ptr = 1;
1790#endif 3012#endif
1791 3013
1792 loop_init (EV_A_ flags); 3014 loop_init (EV_A_ flags);
1793 3015
1794 if (ev_backend (EV_A)) 3016 if (ev_backend (EV_A))
1795 { 3017 {
1796#ifndef _WIN32 3018#if EV_CHILD_ENABLE
1797 ev_signal_init (&childev, childcb, SIGCHLD); 3019 ev_signal_init (&childev, childcb, SIGCHLD);
1798 ev_set_priority (&childev, EV_MAXPRI); 3020 ev_set_priority (&childev, EV_MAXPRI);
1799 ev_signal_start (EV_A_ &childev); 3021 ev_signal_start (EV_A_ &childev);
1800 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3022 ev_unref (EV_A); /* child watcher should not keep loop alive */
1801#endif 3023#endif
… …
1806 3028
1807 return ev_default_loop_ptr; 3029 return ev_default_loop_ptr;
1808} 3030}
1809 3031
1810void 3032void
1811ev_default_destroy (void) 3033ev_loop_fork (EV_P) EV_THROW
1812{ 3034{
1813#if EV_MULTIPLICITY 3035 postfork = 1;
1814 struct ev_loop *loop = ev_default_loop_ptr;
1815#endif
1816
1817 ev_default_loop_ptr = 0;
1818
1819#ifndef _WIN32
1820 ev_ref (EV_A); /* child watcher */
1821 ev_signal_stop (EV_A_ &childev);
1822#endif
1823
1824 loop_destroy (EV_A);
1825}
1826
1827void
1828ev_default_fork (void)
1829{
1830#if EV_MULTIPLICITY
1831 struct ev_loop *loop = ev_default_loop_ptr;
1832#endif
1833
1834 postfork = 1; /* must be in line with ev_loop_fork */
1835} 3036}
1836 3037
1837/*****************************************************************************/ 3038/*****************************************************************************/
1838 3039
1839void 3040void
1840ev_invoke (EV_P_ void *w, int revents) 3041ev_invoke (EV_P_ void *w, int revents)
1841{ 3042{
1842 EV_CB_INVOKE ((W)w, revents); 3043 EV_CB_INVOKE ((W)w, revents);
1843} 3044}
1844 3045
3046unsigned int
3047ev_pending_count (EV_P) EV_THROW
3048{
3049 int pri;
3050 unsigned int count = 0;
3051
3052 for (pri = NUMPRI; pri--; )
3053 count += pendingcnt [pri];
3054
3055 return count;
3056}
3057
1845void noinline 3058void noinline
1846ev_invoke_pending (EV_P) 3059ev_invoke_pending (EV_P)
1847{ 3060{
1848 int pri; 3061 pendingpri = NUMPRI;
1849 3062
1850 for (pri = NUMPRI; pri--; ) 3063 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3064 {
3065 --pendingpri;
3066
1851 while (pendingcnt [pri]) 3067 while (pendingcnt [pendingpri])
1852 { 3068 {
1853 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3069 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1854 3070
1855 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1856 /* ^ this is no longer true, as pending_w could be here */
1857
1858 p->w->pending = 0; 3071 p->w->pending = 0;
1859 EV_CB_INVOKE (p->w, p->events); 3072 EV_CB_INVOKE (p->w, p->events);
1860 EV_FREQUENT_CHECK; 3073 EV_FREQUENT_CHECK;
1861 } 3074 }
3075 }
1862} 3076}
1863 3077
1864#if EV_IDLE_ENABLE 3078#if EV_IDLE_ENABLE
1865/* make idle watchers pending. this handles the "call-idle */ 3079/* make idle watchers pending. this handles the "call-idle */
1866/* only when higher priorities are idle" logic */ 3080/* only when higher priorities are idle" logic */
… …
1918 EV_FREQUENT_CHECK; 3132 EV_FREQUENT_CHECK;
1919 feed_reverse (EV_A_ (W)w); 3133 feed_reverse (EV_A_ (W)w);
1920 } 3134 }
1921 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 3135 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1922 3136
1923 feed_reverse_done (EV_A_ EV_TIMEOUT); 3137 feed_reverse_done (EV_A_ EV_TIMER);
1924 } 3138 }
1925} 3139}
1926 3140
1927#if EV_PERIODIC_ENABLE 3141#if EV_PERIODIC_ENABLE
3142
3143static void noinline
3144periodic_recalc (EV_P_ ev_periodic *w)
3145{
3146 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3147 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3148
3149 /* the above almost always errs on the low side */
3150 while (at <= ev_rt_now)
3151 {
3152 ev_tstamp nat = at + w->interval;
3153
3154 /* when resolution fails us, we use ev_rt_now */
3155 if (expect_false (nat == at))
3156 {
3157 at = ev_rt_now;
3158 break;
3159 }
3160
3161 at = nat;
3162 }
3163
3164 ev_at (w) = at;
3165}
3166
1928/* make periodics pending */ 3167/* make periodics pending */
1929inline_size void 3168inline_size void
1930periodics_reify (EV_P) 3169periodics_reify (EV_P)
1931{ 3170{
1932 EV_FREQUENT_CHECK; 3171 EV_FREQUENT_CHECK;
1933 3172
1934 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3173 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1935 { 3174 {
1936 int feed_count = 0;
1937
1938 do 3175 do
1939 { 3176 {
1940 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3177 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1941 3178
1942 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3179 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1951 ANHE_at_cache (periodics [HEAP0]); 3188 ANHE_at_cache (periodics [HEAP0]);
1952 downheap (periodics, periodiccnt, HEAP0); 3189 downheap (periodics, periodiccnt, HEAP0);
1953 } 3190 }
1954 else if (w->interval) 3191 else if (w->interval)
1955 { 3192 {
1956 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3193 periodic_recalc (EV_A_ w);
1957 /* if next trigger time is not sufficiently in the future, put it there */
1958 /* this might happen because of floating point inexactness */
1959 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1960 {
1961 ev_at (w) += w->interval;
1962
1963 /* if interval is unreasonably low we might still have a time in the past */
1964 /* so correct this. this will make the periodic very inexact, but the user */
1965 /* has effectively asked to get triggered more often than possible */
1966 if (ev_at (w) < ev_rt_now)
1967 ev_at (w) = ev_rt_now;
1968 }
1969
1970 ANHE_at_cache (periodics [HEAP0]); 3194 ANHE_at_cache (periodics [HEAP0]);
1971 downheap (periodics, periodiccnt, HEAP0); 3195 downheap (periodics, periodiccnt, HEAP0);
1972 } 3196 }
1973 else 3197 else
1974 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3198 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1981 feed_reverse_done (EV_A_ EV_PERIODIC); 3205 feed_reverse_done (EV_A_ EV_PERIODIC);
1982 } 3206 }
1983} 3207}
1984 3208
1985/* simply recalculate all periodics */ 3209/* simply recalculate all periodics */
1986/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 3210/* TODO: maybe ensure that at least one event happens when jumping forward? */
1987static void noinline 3211static void noinline ecb_cold
1988periodics_reschedule (EV_P) 3212periodics_reschedule (EV_P)
1989{ 3213{
1990 int i; 3214 int i;
1991 3215
1992 /* adjust periodics after time jump */ 3216 /* adjust periodics after time jump */
… …
1995 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3219 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1996 3220
1997 if (w->reschedule_cb) 3221 if (w->reschedule_cb)
1998 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3222 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1999 else if (w->interval) 3223 else if (w->interval)
2000 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3224 periodic_recalc (EV_A_ w);
2001 3225
2002 ANHE_at_cache (periodics [i]); 3226 ANHE_at_cache (periodics [i]);
2003 } 3227 }
2004 3228
2005 reheap (periodics, periodiccnt); 3229 reheap (periodics, periodiccnt);
2006} 3230}
2007#endif 3231#endif
2008 3232
2009/* adjust all timers by a given offset */ 3233/* adjust all timers by a given offset */
2010static void noinline 3234static void noinline ecb_cold
2011timers_reschedule (EV_P_ ev_tstamp adjust) 3235timers_reschedule (EV_P_ ev_tstamp adjust)
2012{ 3236{
2013 int i; 3237 int i;
2014 3238
2015 for (i = 0; i < timercnt; ++i) 3239 for (i = 0; i < timercnt; ++i)
… …
2019 ANHE_at_cache (*he); 3243 ANHE_at_cache (*he);
2020 } 3244 }
2021} 3245}
2022 3246
2023/* fetch new monotonic and realtime times from the kernel */ 3247/* fetch new monotonic and realtime times from the kernel */
2024/* also detetc if there was a timejump, and act accordingly */ 3248/* also detect if there was a timejump, and act accordingly */
2025inline_speed void 3249inline_speed void
2026time_update (EV_P_ ev_tstamp max_block) 3250time_update (EV_P_ ev_tstamp max_block)
2027{ 3251{
2028#if EV_USE_MONOTONIC 3252#if EV_USE_MONOTONIC
2029 if (expect_true (have_monotonic)) 3253 if (expect_true (have_monotonic))
… …
2052 * doesn't hurt either as we only do this on time-jumps or 3276 * doesn't hurt either as we only do this on time-jumps or
2053 * in the unlikely event of having been preempted here. 3277 * in the unlikely event of having been preempted here.
2054 */ 3278 */
2055 for (i = 4; --i; ) 3279 for (i = 4; --i; )
2056 { 3280 {
3281 ev_tstamp diff;
2057 rtmn_diff = ev_rt_now - mn_now; 3282 rtmn_diff = ev_rt_now - mn_now;
2058 3283
3284 diff = odiff - rtmn_diff;
3285
2059 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3286 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2060 return; /* all is well */ 3287 return; /* all is well */
2061 3288
2062 ev_rt_now = ev_time (); 3289 ev_rt_now = ev_time ();
2063 mn_now = get_clock (); 3290 mn_now = get_clock ();
2064 now_floor = mn_now; 3291 now_floor = mn_now;
… …
2086 3313
2087 mn_now = ev_rt_now; 3314 mn_now = ev_rt_now;
2088 } 3315 }
2089} 3316}
2090 3317
2091void 3318int
2092ev_loop (EV_P_ int flags) 3319ev_run (EV_P_ int flags)
2093{ 3320{
2094#if EV_MINIMAL < 2 3321#if EV_FEATURE_API
2095 ++loop_depth; 3322 ++loop_depth;
2096#endif 3323#endif
2097 3324
2098 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3325 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2099 3326
2100 loop_done = EVUNLOOP_CANCEL; 3327 loop_done = EVBREAK_CANCEL;
2101 3328
2102 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3329 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2103 3330
2104 do 3331 do
2105 { 3332 {
2106#if EV_VERIFY >= 2 3333#if EV_VERIFY >= 2
2107 ev_loop_verify (EV_A); 3334 ev_verify (EV_A);
2108#endif 3335#endif
2109 3336
2110#ifndef _WIN32 3337#ifndef _WIN32
2111 if (expect_false (curpid)) /* penalise the forking check even more */ 3338 if (expect_false (curpid)) /* penalise the forking check even more */
2112 if (expect_false (getpid () != curpid)) 3339 if (expect_false (getpid () != curpid))
… …
2124 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3351 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2125 EV_INVOKE_PENDING; 3352 EV_INVOKE_PENDING;
2126 } 3353 }
2127#endif 3354#endif
2128 3355
3356#if EV_PREPARE_ENABLE
2129 /* queue prepare watchers (and execute them) */ 3357 /* queue prepare watchers (and execute them) */
2130 if (expect_false (preparecnt)) 3358 if (expect_false (preparecnt))
2131 { 3359 {
2132 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3360 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2133 EV_INVOKE_PENDING; 3361 EV_INVOKE_PENDING;
2134 } 3362 }
3363#endif
2135 3364
2136 if (expect_false (loop_done)) 3365 if (expect_false (loop_done))
2137 break; 3366 break;
2138 3367
2139 /* we might have forked, so reify kernel state if necessary */ 3368 /* we might have forked, so reify kernel state if necessary */
… …
2146 /* calculate blocking time */ 3375 /* calculate blocking time */
2147 { 3376 {
2148 ev_tstamp waittime = 0.; 3377 ev_tstamp waittime = 0.;
2149 ev_tstamp sleeptime = 0.; 3378 ev_tstamp sleeptime = 0.;
2150 3379
3380 /* remember old timestamp for io_blocktime calculation */
3381 ev_tstamp prev_mn_now = mn_now;
3382
3383 /* update time to cancel out callback processing overhead */
3384 time_update (EV_A_ 1e100);
3385
3386 /* from now on, we want a pipe-wake-up */
3387 pipe_write_wanted = 1;
3388
3389 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3390
2151 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2152 { 3392 {
2153 /* remember old timestamp for io_blocktime calculation */
2154 ev_tstamp prev_mn_now = mn_now;
2155
2156 /* update time to cancel out callback processing overhead */
2157 time_update (EV_A_ 1e100);
2158
2159 waittime = MAX_BLOCKTIME; 3393 waittime = MAX_BLOCKTIME;
2160 3394
2161 if (timercnt) 3395 if (timercnt)
2162 { 3396 {
2163 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2164 if (waittime > to) waittime = to; 3398 if (waittime > to) waittime = to;
2165 } 3399 }
2166 3400
2167#if EV_PERIODIC_ENABLE 3401#if EV_PERIODIC_ENABLE
2168 if (periodiccnt) 3402 if (periodiccnt)
2169 { 3403 {
2170 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2171 if (waittime > to) waittime = to; 3405 if (waittime > to) waittime = to;
2172 } 3406 }
2173#endif 3407#endif
2174 3408
2175 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3409 /* don't let timeouts decrease the waittime below timeout_blocktime */
2176 if (expect_false (waittime < timeout_blocktime)) 3410 if (expect_false (waittime < timeout_blocktime))
2177 waittime = timeout_blocktime; 3411 waittime = timeout_blocktime;
3412
3413 /* at this point, we NEED to wait, so we have to ensure */
3414 /* to pass a minimum nonzero value to the backend */
3415 if (expect_false (waittime < backend_mintime))
3416 waittime = backend_mintime;
2178 3417
2179 /* extra check because io_blocktime is commonly 0 */ 3418 /* extra check because io_blocktime is commonly 0 */
2180 if (expect_false (io_blocktime)) 3419 if (expect_false (io_blocktime))
2181 { 3420 {
2182 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3421 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2183 3422
2184 if (sleeptime > waittime - backend_fudge) 3423 if (sleeptime > waittime - backend_mintime)
2185 sleeptime = waittime - backend_fudge; 3424 sleeptime = waittime - backend_mintime;
2186 3425
2187 if (expect_true (sleeptime > 0.)) 3426 if (expect_true (sleeptime > 0.))
2188 { 3427 {
2189 ev_sleep (sleeptime); 3428 ev_sleep (sleeptime);
2190 waittime -= sleeptime; 3429 waittime -= sleeptime;
2191 } 3430 }
2192 } 3431 }
2193 } 3432 }
2194 3433
2195#if EV_MINIMAL < 2 3434#if EV_FEATURE_API
2196 ++loop_count; 3435 ++loop_count;
2197#endif 3436#endif
2198 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3437 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2199 backend_poll (EV_A_ waittime); 3438 backend_poll (EV_A_ waittime);
2200 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3439 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3440
3441 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3442
3443 ECB_MEMORY_FENCE_ACQUIRE;
3444 if (pipe_write_skipped)
3445 {
3446 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3447 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3448 }
3449
2201 3450
2202 /* update ev_rt_now, do magic */ 3451 /* update ev_rt_now, do magic */
2203 time_update (EV_A_ waittime + sleeptime); 3452 time_update (EV_A_ waittime + sleeptime);
2204 } 3453 }
2205 3454
… …
2212#if EV_IDLE_ENABLE 3461#if EV_IDLE_ENABLE
2213 /* queue idle watchers unless other events are pending */ 3462 /* queue idle watchers unless other events are pending */
2214 idle_reify (EV_A); 3463 idle_reify (EV_A);
2215#endif 3464#endif
2216 3465
3466#if EV_CHECK_ENABLE
2217 /* queue check watchers, to be executed first */ 3467 /* queue check watchers, to be executed first */
2218 if (expect_false (checkcnt)) 3468 if (expect_false (checkcnt))
2219 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3469 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3470#endif
2220 3471
2221 EV_INVOKE_PENDING; 3472 EV_INVOKE_PENDING;
2222 } 3473 }
2223 while (expect_true ( 3474 while (expect_true (
2224 activecnt 3475 activecnt
2225 && !loop_done 3476 && !loop_done
2226 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3477 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2227 )); 3478 ));
2228 3479
2229 if (loop_done == EVUNLOOP_ONE) 3480 if (loop_done == EVBREAK_ONE)
2230 loop_done = EVUNLOOP_CANCEL; 3481 loop_done = EVBREAK_CANCEL;
2231 3482
2232#if EV_MINIMAL < 2 3483#if EV_FEATURE_API
2233 --loop_depth; 3484 --loop_depth;
2234#endif 3485#endif
3486
3487 return activecnt;
2235} 3488}
2236 3489
2237void 3490void
2238ev_unloop (EV_P_ int how) 3491ev_break (EV_P_ int how) EV_THROW
2239{ 3492{
2240 loop_done = how; 3493 loop_done = how;
2241} 3494}
2242 3495
2243void 3496void
2244ev_ref (EV_P) 3497ev_ref (EV_P) EV_THROW
2245{ 3498{
2246 ++activecnt; 3499 ++activecnt;
2247} 3500}
2248 3501
2249void 3502void
2250ev_unref (EV_P) 3503ev_unref (EV_P) EV_THROW
2251{ 3504{
2252 --activecnt; 3505 --activecnt;
2253} 3506}
2254 3507
2255void 3508void
2256ev_now_update (EV_P) 3509ev_now_update (EV_P) EV_THROW
2257{ 3510{
2258 time_update (EV_A_ 1e100); 3511 time_update (EV_A_ 1e100);
2259} 3512}
2260 3513
2261void 3514void
2262ev_suspend (EV_P) 3515ev_suspend (EV_P) EV_THROW
2263{ 3516{
2264 ev_now_update (EV_A); 3517 ev_now_update (EV_A);
2265} 3518}
2266 3519
2267void 3520void
2268ev_resume (EV_P) 3521ev_resume (EV_P) EV_THROW
2269{ 3522{
2270 ev_tstamp mn_prev = mn_now; 3523 ev_tstamp mn_prev = mn_now;
2271 3524
2272 ev_now_update (EV_A); 3525 ev_now_update (EV_A);
2273 timers_reschedule (EV_A_ mn_now - mn_prev); 3526 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2290inline_size void 3543inline_size void
2291wlist_del (WL *head, WL elem) 3544wlist_del (WL *head, WL elem)
2292{ 3545{
2293 while (*head) 3546 while (*head)
2294 { 3547 {
2295 if (*head == elem) 3548 if (expect_true (*head == elem))
2296 { 3549 {
2297 *head = elem->next; 3550 *head = elem->next;
2298 return; 3551 break;
2299 } 3552 }
2300 3553
2301 head = &(*head)->next; 3554 head = &(*head)->next;
2302 } 3555 }
2303} 3556}
… …
2312 w->pending = 0; 3565 w->pending = 0;
2313 } 3566 }
2314} 3567}
2315 3568
2316int 3569int
2317ev_clear_pending (EV_P_ void *w) 3570ev_clear_pending (EV_P_ void *w) EV_THROW
2318{ 3571{
2319 W w_ = (W)w; 3572 W w_ = (W)w;
2320 int pending = w_->pending; 3573 int pending = w_->pending;
2321 3574
2322 if (expect_true (pending)) 3575 if (expect_true (pending))
… …
2355} 3608}
2356 3609
2357/*****************************************************************************/ 3610/*****************************************************************************/
2358 3611
2359void noinline 3612void noinline
2360ev_io_start (EV_P_ ev_io *w) 3613ev_io_start (EV_P_ ev_io *w) EV_THROW
2361{ 3614{
2362 int fd = w->fd; 3615 int fd = w->fd;
2363 3616
2364 if (expect_false (ev_is_active (w))) 3617 if (expect_false (ev_is_active (w)))
2365 return; 3618 return;
2366 3619
2367 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 3620 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2368 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3621 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2369 3622
2370 EV_FREQUENT_CHECK; 3623 EV_FREQUENT_CHECK;
2371 3624
2372 ev_start (EV_A_ (W)w, 1); 3625 ev_start (EV_A_ (W)w, 1);
2373 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3626 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2374 wlist_add (&anfds[fd].head, (WL)w); 3627 wlist_add (&anfds[fd].head, (WL)w);
2375 3628
3629 /* common bug, apparently */
3630 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3631
2376 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3632 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2377 w->events &= ~EV__IOFDSET; 3633 w->events &= ~EV__IOFDSET;
2378 3634
2379 EV_FREQUENT_CHECK; 3635 EV_FREQUENT_CHECK;
2380} 3636}
2381 3637
2382void noinline 3638void noinline
2383ev_io_stop (EV_P_ ev_io *w) 3639ev_io_stop (EV_P_ ev_io *w) EV_THROW
2384{ 3640{
2385 clear_pending (EV_A_ (W)w); 3641 clear_pending (EV_A_ (W)w);
2386 if (expect_false (!ev_is_active (w))) 3642 if (expect_false (!ev_is_active (w)))
2387 return; 3643 return;
2388 3644
… …
2391 EV_FREQUENT_CHECK; 3647 EV_FREQUENT_CHECK;
2392 3648
2393 wlist_del (&anfds[w->fd].head, (WL)w); 3649 wlist_del (&anfds[w->fd].head, (WL)w);
2394 ev_stop (EV_A_ (W)w); 3650 ev_stop (EV_A_ (W)w);
2395 3651
2396 fd_change (EV_A_ w->fd, 1); 3652 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2397 3653
2398 EV_FREQUENT_CHECK; 3654 EV_FREQUENT_CHECK;
2399} 3655}
2400 3656
2401void noinline 3657void noinline
2402ev_timer_start (EV_P_ ev_timer *w) 3658ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2403{ 3659{
2404 if (expect_false (ev_is_active (w))) 3660 if (expect_false (ev_is_active (w)))
2405 return; 3661 return;
2406 3662
2407 ev_at (w) += mn_now; 3663 ev_at (w) += mn_now;
… …
2421 3677
2422 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3678 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2423} 3679}
2424 3680
2425void noinline 3681void noinline
2426ev_timer_stop (EV_P_ ev_timer *w) 3682ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2427{ 3683{
2428 clear_pending (EV_A_ (W)w); 3684 clear_pending (EV_A_ (W)w);
2429 if (expect_false (!ev_is_active (w))) 3685 if (expect_false (!ev_is_active (w)))
2430 return; 3686 return;
2431 3687
… …
2443 timers [active] = timers [timercnt + HEAP0]; 3699 timers [active] = timers [timercnt + HEAP0];
2444 adjustheap (timers, timercnt, active); 3700 adjustheap (timers, timercnt, active);
2445 } 3701 }
2446 } 3702 }
2447 3703
2448 EV_FREQUENT_CHECK;
2449
2450 ev_at (w) -= mn_now; 3704 ev_at (w) -= mn_now;
2451 3705
2452 ev_stop (EV_A_ (W)w); 3706 ev_stop (EV_A_ (W)w);
3707
3708 EV_FREQUENT_CHECK;
2453} 3709}
2454 3710
2455void noinline 3711void noinline
2456ev_timer_again (EV_P_ ev_timer *w) 3712ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2457{ 3713{
2458 EV_FREQUENT_CHECK; 3714 EV_FREQUENT_CHECK;
3715
3716 clear_pending (EV_A_ (W)w);
2459 3717
2460 if (ev_is_active (w)) 3718 if (ev_is_active (w))
2461 { 3719 {
2462 if (w->repeat) 3720 if (w->repeat)
2463 { 3721 {
… …
2475 } 3733 }
2476 3734
2477 EV_FREQUENT_CHECK; 3735 EV_FREQUENT_CHECK;
2478} 3736}
2479 3737
3738ev_tstamp
3739ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3740{
3741 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3742}
3743
2480#if EV_PERIODIC_ENABLE 3744#if EV_PERIODIC_ENABLE
2481void noinline 3745void noinline
2482ev_periodic_start (EV_P_ ev_periodic *w) 3746ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2483{ 3747{
2484 if (expect_false (ev_is_active (w))) 3748 if (expect_false (ev_is_active (w)))
2485 return; 3749 return;
2486 3750
2487 if (w->reschedule_cb) 3751 if (w->reschedule_cb)
2488 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2489 else if (w->interval) 3753 else if (w->interval)
2490 { 3754 {
2491 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3755 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2492 /* this formula differs from the one in periodic_reify because we do not always round up */ 3756 periodic_recalc (EV_A_ w);
2493 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2494 } 3757 }
2495 else 3758 else
2496 ev_at (w) = w->offset; 3759 ev_at (w) = w->offset;
2497 3760
2498 EV_FREQUENT_CHECK; 3761 EV_FREQUENT_CHECK;
… …
2508 3771
2509 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3772 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2510} 3773}
2511 3774
2512void noinline 3775void noinline
2513ev_periodic_stop (EV_P_ ev_periodic *w) 3776ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2514{ 3777{
2515 clear_pending (EV_A_ (W)w); 3778 clear_pending (EV_A_ (W)w);
2516 if (expect_false (!ev_is_active (w))) 3779 if (expect_false (!ev_is_active (w)))
2517 return; 3780 return;
2518 3781
… …
2530 periodics [active] = periodics [periodiccnt + HEAP0]; 3793 periodics [active] = periodics [periodiccnt + HEAP0];
2531 adjustheap (periodics, periodiccnt, active); 3794 adjustheap (periodics, periodiccnt, active);
2532 } 3795 }
2533 } 3796 }
2534 3797
2535 EV_FREQUENT_CHECK;
2536
2537 ev_stop (EV_A_ (W)w); 3798 ev_stop (EV_A_ (W)w);
3799
3800 EV_FREQUENT_CHECK;
2538} 3801}
2539 3802
2540void noinline 3803void noinline
2541ev_periodic_again (EV_P_ ev_periodic *w) 3804ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2542{ 3805{
2543 /* TODO: use adjustheap and recalculation */ 3806 /* TODO: use adjustheap and recalculation */
2544 ev_periodic_stop (EV_A_ w); 3807 ev_periodic_stop (EV_A_ w);
2545 ev_periodic_start (EV_A_ w); 3808 ev_periodic_start (EV_A_ w);
2546} 3809}
… …
2548 3811
2549#ifndef SA_RESTART 3812#ifndef SA_RESTART
2550# define SA_RESTART 0 3813# define SA_RESTART 0
2551#endif 3814#endif
2552 3815
3816#if EV_SIGNAL_ENABLE
3817
2553void noinline 3818void noinline
2554ev_signal_start (EV_P_ ev_signal *w) 3819ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2555{ 3820{
2556#if EV_MULTIPLICITY
2557 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2558#endif
2559 if (expect_false (ev_is_active (w))) 3821 if (expect_false (ev_is_active (w)))
2560 return; 3822 return;
2561 3823
2562 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 3824 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2563 3825
2564 evpipe_init (EV_A); 3826#if EV_MULTIPLICITY
3827 assert (("libev: a signal must not be attached to two different loops",
3828 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2565 3829
2566 EV_FREQUENT_CHECK; 3830 signals [w->signum - 1].loop = EV_A;
3831 ECB_MEMORY_FENCE_RELEASE;
3832#endif
2567 3833
3834 EV_FREQUENT_CHECK;
3835
3836#if EV_USE_SIGNALFD
3837 if (sigfd == -2)
2568 { 3838 {
2569#ifndef _WIN32 3839 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2570 sigset_t full, prev; 3840 if (sigfd < 0 && errno == EINVAL)
2571 sigfillset (&full); 3841 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2572 sigprocmask (SIG_SETMASK, &full, &prev);
2573#endif
2574 3842
2575 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 3843 if (sigfd >= 0)
3844 {
3845 fd_intern (sigfd); /* doing it twice will not hurt */
2576 3846
2577#ifndef _WIN32 3847 sigemptyset (&sigfd_set);
2578 sigprocmask (SIG_SETMASK, &prev, 0); 3848
2579#endif 3849 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3850 ev_set_priority (&sigfd_w, EV_MAXPRI);
3851 ev_io_start (EV_A_ &sigfd_w);
3852 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3853 }
2580 } 3854 }
3855
3856 if (sigfd >= 0)
3857 {
3858 /* TODO: check .head */
3859 sigaddset (&sigfd_set, w->signum);
3860 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3861
3862 signalfd (sigfd, &sigfd_set, 0);
3863 }
3864#endif
2581 3865
2582 ev_start (EV_A_ (W)w, 1); 3866 ev_start (EV_A_ (W)w, 1);
2583 wlist_add (&signals [w->signum - 1].head, (WL)w); 3867 wlist_add (&signals [w->signum - 1].head, (WL)w);
2584 3868
2585 if (!((WL)w)->next) 3869 if (!((WL)w)->next)
3870# if EV_USE_SIGNALFD
3871 if (sigfd < 0) /*TODO*/
3872# endif
2586 { 3873 {
2587#if _WIN32 3874# ifdef _WIN32
3875 evpipe_init (EV_A);
3876
2588 signal (w->signum, ev_sighandler); 3877 signal (w->signum, ev_sighandler);
2589#else 3878# else
2590 struct sigaction sa = { }; 3879 struct sigaction sa;
3880
3881 evpipe_init (EV_A);
3882
2591 sa.sa_handler = ev_sighandler; 3883 sa.sa_handler = ev_sighandler;
2592 sigfillset (&sa.sa_mask); 3884 sigfillset (&sa.sa_mask);
2593 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3885 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2594 sigaction (w->signum, &sa, 0); 3886 sigaction (w->signum, &sa, 0);
3887
3888 if (origflags & EVFLAG_NOSIGMASK)
3889 {
3890 sigemptyset (&sa.sa_mask);
3891 sigaddset (&sa.sa_mask, w->signum);
3892 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3893 }
2595#endif 3894#endif
2596 } 3895 }
2597 3896
2598 EV_FREQUENT_CHECK; 3897 EV_FREQUENT_CHECK;
2599} 3898}
2600 3899
2601void noinline 3900void noinline
2602ev_signal_stop (EV_P_ ev_signal *w) 3901ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2603{ 3902{
2604 clear_pending (EV_A_ (W)w); 3903 clear_pending (EV_A_ (W)w);
2605 if (expect_false (!ev_is_active (w))) 3904 if (expect_false (!ev_is_active (w)))
2606 return; 3905 return;
2607 3906
… …
2609 3908
2610 wlist_del (&signals [w->signum - 1].head, (WL)w); 3909 wlist_del (&signals [w->signum - 1].head, (WL)w);
2611 ev_stop (EV_A_ (W)w); 3910 ev_stop (EV_A_ (W)w);
2612 3911
2613 if (!signals [w->signum - 1].head) 3912 if (!signals [w->signum - 1].head)
3913 {
3914#if EV_MULTIPLICITY
3915 signals [w->signum - 1].loop = 0; /* unattach from signal */
3916#endif
3917#if EV_USE_SIGNALFD
3918 if (sigfd >= 0)
3919 {
3920 sigset_t ss;
3921
3922 sigemptyset (&ss);
3923 sigaddset (&ss, w->signum);
3924 sigdelset (&sigfd_set, w->signum);
3925
3926 signalfd (sigfd, &sigfd_set, 0);
3927 sigprocmask (SIG_UNBLOCK, &ss, 0);
3928 }
3929 else
3930#endif
2614 signal (w->signum, SIG_DFL); 3931 signal (w->signum, SIG_DFL);
3932 }
2615 3933
2616 EV_FREQUENT_CHECK; 3934 EV_FREQUENT_CHECK;
2617} 3935}
3936
3937#endif
3938
3939#if EV_CHILD_ENABLE
2618 3940
2619void 3941void
2620ev_child_start (EV_P_ ev_child *w) 3942ev_child_start (EV_P_ ev_child *w) EV_THROW
2621{ 3943{
2622#if EV_MULTIPLICITY 3944#if EV_MULTIPLICITY
2623 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3945 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2624#endif 3946#endif
2625 if (expect_false (ev_is_active (w))) 3947 if (expect_false (ev_is_active (w)))
2626 return; 3948 return;
2627 3949
2628 EV_FREQUENT_CHECK; 3950 EV_FREQUENT_CHECK;
2629 3951
2630 ev_start (EV_A_ (W)w, 1); 3952 ev_start (EV_A_ (W)w, 1);
2631 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3953 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2632 3954
2633 EV_FREQUENT_CHECK; 3955 EV_FREQUENT_CHECK;
2634} 3956}
2635 3957
2636void 3958void
2637ev_child_stop (EV_P_ ev_child *w) 3959ev_child_stop (EV_P_ ev_child *w) EV_THROW
2638{ 3960{
2639 clear_pending (EV_A_ (W)w); 3961 clear_pending (EV_A_ (W)w);
2640 if (expect_false (!ev_is_active (w))) 3962 if (expect_false (!ev_is_active (w)))
2641 return; 3963 return;
2642 3964
2643 EV_FREQUENT_CHECK; 3965 EV_FREQUENT_CHECK;
2644 3966
2645 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3967 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2646 ev_stop (EV_A_ (W)w); 3968 ev_stop (EV_A_ (W)w);
2647 3969
2648 EV_FREQUENT_CHECK; 3970 EV_FREQUENT_CHECK;
2649} 3971}
3972
3973#endif
2650 3974
2651#if EV_STAT_ENABLE 3975#if EV_STAT_ENABLE
2652 3976
2653# ifdef _WIN32 3977# ifdef _WIN32
2654# undef lstat 3978# undef lstat
… …
2660#define MIN_STAT_INTERVAL 0.1074891 3984#define MIN_STAT_INTERVAL 0.1074891
2661 3985
2662static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3986static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2663 3987
2664#if EV_USE_INOTIFY 3988#if EV_USE_INOTIFY
2665# define EV_INOTIFY_BUFSIZE 8192 3989
3990/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3991# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2666 3992
2667static void noinline 3993static void noinline
2668infy_add (EV_P_ ev_stat *w) 3994infy_add (EV_P_ ev_stat *w)
2669{ 3995{
2670 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 3996 w->wd = inotify_add_watch (fs_fd, w->path,
3997 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3998 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3999 | IN_DONT_FOLLOW | IN_MASK_ADD);
2671 4000
2672 if (w->wd < 0) 4001 if (w->wd >= 0)
4002 {
4003 struct statfs sfs;
4004
4005 /* now local changes will be tracked by inotify, but remote changes won't */
4006 /* unless the filesystem is known to be local, we therefore still poll */
4007 /* also do poll on <2.6.25, but with normal frequency */
4008
4009 if (!fs_2625)
4010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4011 else if (!statfs (w->path, &sfs)
4012 && (sfs.f_type == 0x1373 /* devfs */
4013 || sfs.f_type == 0x4006 /* fat */
4014 || sfs.f_type == 0x4d44 /* msdos */
4015 || sfs.f_type == 0xEF53 /* ext2/3 */
4016 || sfs.f_type == 0x72b6 /* jffs2 */
4017 || sfs.f_type == 0x858458f6 /* ramfs */
4018 || sfs.f_type == 0x5346544e /* ntfs */
4019 || sfs.f_type == 0x3153464a /* jfs */
4020 || sfs.f_type == 0x9123683e /* btrfs */
4021 || sfs.f_type == 0x52654973 /* reiser3 */
4022 || sfs.f_type == 0x01021994 /* tmpfs */
4023 || sfs.f_type == 0x58465342 /* xfs */))
4024 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4025 else
4026 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2673 { 4027 }
4028 else
4029 {
4030 /* can't use inotify, continue to stat */
2674 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2675 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2676 4032
2677 /* monitor some parent directory for speedup hints */ 4033 /* if path is not there, monitor some parent directory for speedup hints */
2678 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 4034 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2679 /* but an efficiency issue only */ 4035 /* but an efficiency issue only */
2680 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4036 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2681 { 4037 {
2682 char path [4096]; 4038 char path [4096];
… …
2692 if (!pend || pend == path) 4048 if (!pend || pend == path)
2693 break; 4049 break;
2694 4050
2695 *pend = 0; 4051 *pend = 0;
2696 w->wd = inotify_add_watch (fs_fd, path, mask); 4052 w->wd = inotify_add_watch (fs_fd, path, mask);
2697 } 4053 }
2698 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4054 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2699 } 4055 }
2700 } 4056 }
2701 4057
2702 if (w->wd >= 0) 4058 if (w->wd >= 0)
2703 {
2704 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4059 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2705 4060
2706 /* now local changes will be tracked by inotify, but remote changes won't */ 4061 /* now re-arm timer, if required */
2707 /* unless the filesystem it known to be local, we therefore still poll */ 4062 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2708 /* also do poll on <2.6.25, but with normal frequency */
2709 struct statfs sfs;
2710
2711 if (fs_2625 && !statfs (w->path, &sfs))
2712 if (sfs.f_type == 0x1373 /* devfs */
2713 || sfs.f_type == 0xEF53 /* ext2/3 */
2714 || sfs.f_type == 0x3153464a /* jfs */
2715 || sfs.f_type == 0x52654973 /* reiser3 */
2716 || sfs.f_type == 0x01021994 /* tempfs */
2717 || sfs.f_type == 0x58465342 /* xfs */)
2718 return;
2719
2720 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2721 ev_timer_again (EV_A_ &w->timer); 4063 ev_timer_again (EV_A_ &w->timer);
2722 } 4064 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2723} 4065}
2724 4066
2725static void noinline 4067static void noinline
2726infy_del (EV_P_ ev_stat *w) 4068infy_del (EV_P_ ev_stat *w)
2727{ 4069{
… …
2730 4072
2731 if (wd < 0) 4073 if (wd < 0)
2732 return; 4074 return;
2733 4075
2734 w->wd = -2; 4076 w->wd = -2;
2735 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4077 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2736 wlist_del (&fs_hash [slot].head, (WL)w); 4078 wlist_del (&fs_hash [slot].head, (WL)w);
2737 4079
2738 /* remove this watcher, if others are watching it, they will rearm */ 4080 /* remove this watcher, if others are watching it, they will rearm */
2739 inotify_rm_watch (fs_fd, wd); 4081 inotify_rm_watch (fs_fd, wd);
2740} 4082}
… …
2742static void noinline 4084static void noinline
2743infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4085infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2744{ 4086{
2745 if (slot < 0) 4087 if (slot < 0)
2746 /* overflow, need to check for all hash slots */ 4088 /* overflow, need to check for all hash slots */
2747 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4089 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2748 infy_wd (EV_A_ slot, wd, ev); 4090 infy_wd (EV_A_ slot, wd, ev);
2749 else 4091 else
2750 { 4092 {
2751 WL w_; 4093 WL w_;
2752 4094
2753 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4095 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2754 { 4096 {
2755 ev_stat *w = (ev_stat *)w_; 4097 ev_stat *w = (ev_stat *)w_;
2756 w_ = w_->next; /* lets us remove this watcher and all before it */ 4098 w_ = w_->next; /* lets us remove this watcher and all before it */
2757 4099
2758 if (w->wd == wd || wd == -1) 4100 if (w->wd == wd || wd == -1)
2759 { 4101 {
2760 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4102 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2761 { 4103 {
2762 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4104 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2763 w->wd = -1; 4105 w->wd = -1;
2764 infy_add (EV_A_ w); /* re-add, no matter what */ 4106 infy_add (EV_A_ w); /* re-add, no matter what */
2765 } 4107 }
2766 4108
2767 stat_timer_cb (EV_A_ &w->timer, 0); 4109 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2772 4114
2773static void 4115static void
2774infy_cb (EV_P_ ev_io *w, int revents) 4116infy_cb (EV_P_ ev_io *w, int revents)
2775{ 4117{
2776 char buf [EV_INOTIFY_BUFSIZE]; 4118 char buf [EV_INOTIFY_BUFSIZE];
2777 struct inotify_event *ev = (struct inotify_event *)buf;
2778 int ofs; 4119 int ofs;
2779 int len = read (fs_fd, buf, sizeof (buf)); 4120 int len = read (fs_fd, buf, sizeof (buf));
2780 4121
2781 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4122 for (ofs = 0; ofs < len; )
4123 {
4124 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2782 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4125 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4126 ofs += sizeof (struct inotify_event) + ev->len;
4127 }
2783} 4128}
2784 4129
2785inline_size void 4130inline_size void ecb_cold
2786check_2625 (EV_P) 4131ev_check_2625 (EV_P)
2787{ 4132{
2788 /* kernels < 2.6.25 are borked 4133 /* kernels < 2.6.25 are borked
2789 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4134 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2790 */ 4135 */
2791 struct utsname buf; 4136 if (ev_linux_version () < 0x020619)
2792 int major, minor, micro;
2793
2794 if (uname (&buf))
2795 return; 4137 return;
2796 4138
2797 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2798 return;
2799
2800 if (major < 2
2801 || (major == 2 && minor < 6)
2802 || (major == 2 && minor == 6 && micro < 25))
2803 return;
2804
2805 fs_2625 = 1; 4139 fs_2625 = 1;
4140}
4141
4142inline_size int
4143infy_newfd (void)
4144{
4145#if defined IN_CLOEXEC && defined IN_NONBLOCK
4146 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4147 if (fd >= 0)
4148 return fd;
4149#endif
4150 return inotify_init ();
2806} 4151}
2807 4152
2808inline_size void 4153inline_size void
2809infy_init (EV_P) 4154infy_init (EV_P)
2810{ 4155{
2811 if (fs_fd != -2) 4156 if (fs_fd != -2)
2812 return; 4157 return;
2813 4158
2814 fs_fd = -1; 4159 fs_fd = -1;
2815 4160
2816 check_2625 (EV_A); 4161 ev_check_2625 (EV_A);
2817 4162
2818 fs_fd = inotify_init (); 4163 fs_fd = infy_newfd ();
2819 4164
2820 if (fs_fd >= 0) 4165 if (fs_fd >= 0)
2821 { 4166 {
4167 fd_intern (fs_fd);
2822 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4168 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2823 ev_set_priority (&fs_w, EV_MAXPRI); 4169 ev_set_priority (&fs_w, EV_MAXPRI);
2824 ev_io_start (EV_A_ &fs_w); 4170 ev_io_start (EV_A_ &fs_w);
4171 ev_unref (EV_A);
2825 } 4172 }
2826} 4173}
2827 4174
2828inline_size void 4175inline_size void
2829infy_fork (EV_P) 4176infy_fork (EV_P)
… …
2831 int slot; 4178 int slot;
2832 4179
2833 if (fs_fd < 0) 4180 if (fs_fd < 0)
2834 return; 4181 return;
2835 4182
4183 ev_ref (EV_A);
4184 ev_io_stop (EV_A_ &fs_w);
2836 close (fs_fd); 4185 close (fs_fd);
2837 fs_fd = inotify_init (); 4186 fs_fd = infy_newfd ();
2838 4187
4188 if (fs_fd >= 0)
4189 {
4190 fd_intern (fs_fd);
4191 ev_io_set (&fs_w, fs_fd, EV_READ);
4192 ev_io_start (EV_A_ &fs_w);
4193 ev_unref (EV_A);
4194 }
4195
2839 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4196 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2840 { 4197 {
2841 WL w_ = fs_hash [slot].head; 4198 WL w_ = fs_hash [slot].head;
2842 fs_hash [slot].head = 0; 4199 fs_hash [slot].head = 0;
2843 4200
2844 while (w_) 4201 while (w_)
… …
2849 w->wd = -1; 4206 w->wd = -1;
2850 4207
2851 if (fs_fd >= 0) 4208 if (fs_fd >= 0)
2852 infy_add (EV_A_ w); /* re-add, no matter what */ 4209 infy_add (EV_A_ w); /* re-add, no matter what */
2853 else 4210 else
4211 {
4212 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4213 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2854 ev_timer_again (EV_A_ &w->timer); 4214 ev_timer_again (EV_A_ &w->timer);
4215 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4216 }
2855 } 4217 }
2856 } 4218 }
2857} 4219}
2858 4220
2859#endif 4221#endif
… …
2863#else 4225#else
2864# define EV_LSTAT(p,b) lstat (p, b) 4226# define EV_LSTAT(p,b) lstat (p, b)
2865#endif 4227#endif
2866 4228
2867void 4229void
2868ev_stat_stat (EV_P_ ev_stat *w) 4230ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2869{ 4231{
2870 if (lstat (w->path, &w->attr) < 0) 4232 if (lstat (w->path, &w->attr) < 0)
2871 w->attr.st_nlink = 0; 4233 w->attr.st_nlink = 0;
2872 else if (!w->attr.st_nlink) 4234 else if (!w->attr.st_nlink)
2873 w->attr.st_nlink = 1; 4235 w->attr.st_nlink = 1;
… …
2876static void noinline 4238static void noinline
2877stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4239stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2878{ 4240{
2879 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4241 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2880 4242
2881 /* we copy this here each the time so that */ 4243 ev_statdata prev = w->attr;
2882 /* prev has the old value when the callback gets invoked */
2883 w->prev = w->attr;
2884 ev_stat_stat (EV_A_ w); 4244 ev_stat_stat (EV_A_ w);
2885 4245
2886 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4246 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2887 if ( 4247 if (
2888 w->prev.st_dev != w->attr.st_dev 4248 prev.st_dev != w->attr.st_dev
2889 || w->prev.st_ino != w->attr.st_ino 4249 || prev.st_ino != w->attr.st_ino
2890 || w->prev.st_mode != w->attr.st_mode 4250 || prev.st_mode != w->attr.st_mode
2891 || w->prev.st_nlink != w->attr.st_nlink 4251 || prev.st_nlink != w->attr.st_nlink
2892 || w->prev.st_uid != w->attr.st_uid 4252 || prev.st_uid != w->attr.st_uid
2893 || w->prev.st_gid != w->attr.st_gid 4253 || prev.st_gid != w->attr.st_gid
2894 || w->prev.st_rdev != w->attr.st_rdev 4254 || prev.st_rdev != w->attr.st_rdev
2895 || w->prev.st_size != w->attr.st_size 4255 || prev.st_size != w->attr.st_size
2896 || w->prev.st_atime != w->attr.st_atime 4256 || prev.st_atime != w->attr.st_atime
2897 || w->prev.st_mtime != w->attr.st_mtime 4257 || prev.st_mtime != w->attr.st_mtime
2898 || w->prev.st_ctime != w->attr.st_ctime 4258 || prev.st_ctime != w->attr.st_ctime
2899 ) { 4259 ) {
4260 /* we only update w->prev on actual differences */
4261 /* in case we test more often than invoke the callback, */
4262 /* to ensure that prev is always different to attr */
4263 w->prev = prev;
4264
2900 #if EV_USE_INOTIFY 4265 #if EV_USE_INOTIFY
2901 if (fs_fd >= 0) 4266 if (fs_fd >= 0)
2902 { 4267 {
2903 infy_del (EV_A_ w); 4268 infy_del (EV_A_ w);
2904 infy_add (EV_A_ w); 4269 infy_add (EV_A_ w);
… …
2909 ev_feed_event (EV_A_ w, EV_STAT); 4274 ev_feed_event (EV_A_ w, EV_STAT);
2910 } 4275 }
2911} 4276}
2912 4277
2913void 4278void
2914ev_stat_start (EV_P_ ev_stat *w) 4279ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2915{ 4280{
2916 if (expect_false (ev_is_active (w))) 4281 if (expect_false (ev_is_active (w)))
2917 return; 4282 return;
2918 4283
2919 ev_stat_stat (EV_A_ w); 4284 ev_stat_stat (EV_A_ w);
… …
2929 4294
2930 if (fs_fd >= 0) 4295 if (fs_fd >= 0)
2931 infy_add (EV_A_ w); 4296 infy_add (EV_A_ w);
2932 else 4297 else
2933#endif 4298#endif
4299 {
2934 ev_timer_again (EV_A_ &w->timer); 4300 ev_timer_again (EV_A_ &w->timer);
4301 ev_unref (EV_A);
4302 }
2935 4303
2936 ev_start (EV_A_ (W)w, 1); 4304 ev_start (EV_A_ (W)w, 1);
2937 4305
2938 EV_FREQUENT_CHECK; 4306 EV_FREQUENT_CHECK;
2939} 4307}
2940 4308
2941void 4309void
2942ev_stat_stop (EV_P_ ev_stat *w) 4310ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2943{ 4311{
2944 clear_pending (EV_A_ (W)w); 4312 clear_pending (EV_A_ (W)w);
2945 if (expect_false (!ev_is_active (w))) 4313 if (expect_false (!ev_is_active (w)))
2946 return; 4314 return;
2947 4315
2948 EV_FREQUENT_CHECK; 4316 EV_FREQUENT_CHECK;
2949 4317
2950#if EV_USE_INOTIFY 4318#if EV_USE_INOTIFY
2951 infy_del (EV_A_ w); 4319 infy_del (EV_A_ w);
2952#endif 4320#endif
4321
4322 if (ev_is_active (&w->timer))
4323 {
4324 ev_ref (EV_A);
2953 ev_timer_stop (EV_A_ &w->timer); 4325 ev_timer_stop (EV_A_ &w->timer);
4326 }
2954 4327
2955 ev_stop (EV_A_ (W)w); 4328 ev_stop (EV_A_ (W)w);
2956 4329
2957 EV_FREQUENT_CHECK; 4330 EV_FREQUENT_CHECK;
2958} 4331}
2959#endif 4332#endif
2960 4333
2961#if EV_IDLE_ENABLE 4334#if EV_IDLE_ENABLE
2962void 4335void
2963ev_idle_start (EV_P_ ev_idle *w) 4336ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2964{ 4337{
2965 if (expect_false (ev_is_active (w))) 4338 if (expect_false (ev_is_active (w)))
2966 return; 4339 return;
2967 4340
2968 pri_adjust (EV_A_ (W)w); 4341 pri_adjust (EV_A_ (W)w);
… …
2981 4354
2982 EV_FREQUENT_CHECK; 4355 EV_FREQUENT_CHECK;
2983} 4356}
2984 4357
2985void 4358void
2986ev_idle_stop (EV_P_ ev_idle *w) 4359ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2987{ 4360{
2988 clear_pending (EV_A_ (W)w); 4361 clear_pending (EV_A_ (W)w);
2989 if (expect_false (!ev_is_active (w))) 4362 if (expect_false (!ev_is_active (w)))
2990 return; 4363 return;
2991 4364
… …
3003 4376
3004 EV_FREQUENT_CHECK; 4377 EV_FREQUENT_CHECK;
3005} 4378}
3006#endif 4379#endif
3007 4380
4381#if EV_PREPARE_ENABLE
3008void 4382void
3009ev_prepare_start (EV_P_ ev_prepare *w) 4383ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3010{ 4384{
3011 if (expect_false (ev_is_active (w))) 4385 if (expect_false (ev_is_active (w)))
3012 return; 4386 return;
3013 4387
3014 EV_FREQUENT_CHECK; 4388 EV_FREQUENT_CHECK;
… …
3019 4393
3020 EV_FREQUENT_CHECK; 4394 EV_FREQUENT_CHECK;
3021} 4395}
3022 4396
3023void 4397void
3024ev_prepare_stop (EV_P_ ev_prepare *w) 4398ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3025{ 4399{
3026 clear_pending (EV_A_ (W)w); 4400 clear_pending (EV_A_ (W)w);
3027 if (expect_false (!ev_is_active (w))) 4401 if (expect_false (!ev_is_active (w)))
3028 return; 4402 return;
3029 4403
… …
3038 4412
3039 ev_stop (EV_A_ (W)w); 4413 ev_stop (EV_A_ (W)w);
3040 4414
3041 EV_FREQUENT_CHECK; 4415 EV_FREQUENT_CHECK;
3042} 4416}
4417#endif
3043 4418
4419#if EV_CHECK_ENABLE
3044void 4420void
3045ev_check_start (EV_P_ ev_check *w) 4421ev_check_start (EV_P_ ev_check *w) EV_THROW
3046{ 4422{
3047 if (expect_false (ev_is_active (w))) 4423 if (expect_false (ev_is_active (w)))
3048 return; 4424 return;
3049 4425
3050 EV_FREQUENT_CHECK; 4426 EV_FREQUENT_CHECK;
… …
3055 4431
3056 EV_FREQUENT_CHECK; 4432 EV_FREQUENT_CHECK;
3057} 4433}
3058 4434
3059void 4435void
3060ev_check_stop (EV_P_ ev_check *w) 4436ev_check_stop (EV_P_ ev_check *w) EV_THROW
3061{ 4437{
3062 clear_pending (EV_A_ (W)w); 4438 clear_pending (EV_A_ (W)w);
3063 if (expect_false (!ev_is_active (w))) 4439 if (expect_false (!ev_is_active (w)))
3064 return; 4440 return;
3065 4441
… …
3074 4450
3075 ev_stop (EV_A_ (W)w); 4451 ev_stop (EV_A_ (W)w);
3076 4452
3077 EV_FREQUENT_CHECK; 4453 EV_FREQUENT_CHECK;
3078} 4454}
4455#endif
3079 4456
3080#if EV_EMBED_ENABLE 4457#if EV_EMBED_ENABLE
3081void noinline 4458void noinline
3082ev_embed_sweep (EV_P_ ev_embed *w) 4459ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3083{ 4460{
3084 ev_loop (w->other, EVLOOP_NONBLOCK); 4461 ev_run (w->other, EVRUN_NOWAIT);
3085} 4462}
3086 4463
3087static void 4464static void
3088embed_io_cb (EV_P_ ev_io *io, int revents) 4465embed_io_cb (EV_P_ ev_io *io, int revents)
3089{ 4466{
3090 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4467 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3091 4468
3092 if (ev_cb (w)) 4469 if (ev_cb (w))
3093 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4470 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3094 else 4471 else
3095 ev_loop (w->other, EVLOOP_NONBLOCK); 4472 ev_run (w->other, EVRUN_NOWAIT);
3096} 4473}
3097 4474
3098static void 4475static void
3099embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4476embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3100{ 4477{
3101 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4478 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3102 4479
3103 { 4480 {
3104 struct ev_loop *loop = w->other; 4481 EV_P = w->other;
3105 4482
3106 while (fdchangecnt) 4483 while (fdchangecnt)
3107 { 4484 {
3108 fd_reify (EV_A); 4485 fd_reify (EV_A);
3109 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4486 ev_run (EV_A_ EVRUN_NOWAIT);
3110 } 4487 }
3111 } 4488 }
3112} 4489}
3113 4490
3114static void 4491static void
… …
3117 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 4494 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3118 4495
3119 ev_embed_stop (EV_A_ w); 4496 ev_embed_stop (EV_A_ w);
3120 4497
3121 { 4498 {
3122 struct ev_loop *loop = w->other; 4499 EV_P = w->other;
3123 4500
3124 ev_loop_fork (EV_A); 4501 ev_loop_fork (EV_A);
3125 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4502 ev_run (EV_A_ EVRUN_NOWAIT);
3126 } 4503 }
3127 4504
3128 ev_embed_start (EV_A_ w); 4505 ev_embed_start (EV_A_ w);
3129} 4506}
3130 4507
… …
3135 ev_idle_stop (EV_A_ idle); 4512 ev_idle_stop (EV_A_ idle);
3136} 4513}
3137#endif 4514#endif
3138 4515
3139void 4516void
3140ev_embed_start (EV_P_ ev_embed *w) 4517ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3141{ 4518{
3142 if (expect_false (ev_is_active (w))) 4519 if (expect_false (ev_is_active (w)))
3143 return; 4520 return;
3144 4521
3145 { 4522 {
3146 struct ev_loop *loop = w->other; 4523 EV_P = w->other;
3147 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4524 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3148 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4525 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3149 } 4526 }
3150 4527
3151 EV_FREQUENT_CHECK; 4528 EV_FREQUENT_CHECK;
… …
3166 4543
3167 EV_FREQUENT_CHECK; 4544 EV_FREQUENT_CHECK;
3168} 4545}
3169 4546
3170void 4547void
3171ev_embed_stop (EV_P_ ev_embed *w) 4548ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3172{ 4549{
3173 clear_pending (EV_A_ (W)w); 4550 clear_pending (EV_A_ (W)w);
3174 if (expect_false (!ev_is_active (w))) 4551 if (expect_false (!ev_is_active (w)))
3175 return; 4552 return;
3176 4553
… …
3178 4555
3179 ev_io_stop (EV_A_ &w->io); 4556 ev_io_stop (EV_A_ &w->io);
3180 ev_prepare_stop (EV_A_ &w->prepare); 4557 ev_prepare_stop (EV_A_ &w->prepare);
3181 ev_fork_stop (EV_A_ &w->fork); 4558 ev_fork_stop (EV_A_ &w->fork);
3182 4559
4560 ev_stop (EV_A_ (W)w);
4561
3183 EV_FREQUENT_CHECK; 4562 EV_FREQUENT_CHECK;
3184} 4563}
3185#endif 4564#endif
3186 4565
3187#if EV_FORK_ENABLE 4566#if EV_FORK_ENABLE
3188void 4567void
3189ev_fork_start (EV_P_ ev_fork *w) 4568ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3190{ 4569{
3191 if (expect_false (ev_is_active (w))) 4570 if (expect_false (ev_is_active (w)))
3192 return; 4571 return;
3193 4572
3194 EV_FREQUENT_CHECK; 4573 EV_FREQUENT_CHECK;
… …
3199 4578
3200 EV_FREQUENT_CHECK; 4579 EV_FREQUENT_CHECK;
3201} 4580}
3202 4581
3203void 4582void
3204ev_fork_stop (EV_P_ ev_fork *w) 4583ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3205{ 4584{
3206 clear_pending (EV_A_ (W)w); 4585 clear_pending (EV_A_ (W)w);
3207 if (expect_false (!ev_is_active (w))) 4586 if (expect_false (!ev_is_active (w)))
3208 return; 4587 return;
3209 4588
… …
3220 4599
3221 EV_FREQUENT_CHECK; 4600 EV_FREQUENT_CHECK;
3222} 4601}
3223#endif 4602#endif
3224 4603
4604#if EV_CLEANUP_ENABLE
4605void
4606ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4607{
4608 if (expect_false (ev_is_active (w)))
4609 return;
4610
4611 EV_FREQUENT_CHECK;
4612
4613 ev_start (EV_A_ (W)w, ++cleanupcnt);
4614 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4615 cleanups [cleanupcnt - 1] = w;
4616
4617 /* cleanup watchers should never keep a refcount on the loop */
4618 ev_unref (EV_A);
4619 EV_FREQUENT_CHECK;
4620}
4621
4622void
4623ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4624{
4625 clear_pending (EV_A_ (W)w);
4626 if (expect_false (!ev_is_active (w)))
4627 return;
4628
4629 EV_FREQUENT_CHECK;
4630 ev_ref (EV_A);
4631
4632 {
4633 int active = ev_active (w);
4634
4635 cleanups [active - 1] = cleanups [--cleanupcnt];
4636 ev_active (cleanups [active - 1]) = active;
4637 }
4638
4639 ev_stop (EV_A_ (W)w);
4640
4641 EV_FREQUENT_CHECK;
4642}
4643#endif
4644
3225#if EV_ASYNC_ENABLE 4645#if EV_ASYNC_ENABLE
3226void 4646void
3227ev_async_start (EV_P_ ev_async *w) 4647ev_async_start (EV_P_ ev_async *w) EV_THROW
3228{ 4648{
3229 if (expect_false (ev_is_active (w))) 4649 if (expect_false (ev_is_active (w)))
3230 return; 4650 return;
4651
4652 w->sent = 0;
3231 4653
3232 evpipe_init (EV_A); 4654 evpipe_init (EV_A);
3233 4655
3234 EV_FREQUENT_CHECK; 4656 EV_FREQUENT_CHECK;
3235 4657
… …
3239 4661
3240 EV_FREQUENT_CHECK; 4662 EV_FREQUENT_CHECK;
3241} 4663}
3242 4664
3243void 4665void
3244ev_async_stop (EV_P_ ev_async *w) 4666ev_async_stop (EV_P_ ev_async *w) EV_THROW
3245{ 4667{
3246 clear_pending (EV_A_ (W)w); 4668 clear_pending (EV_A_ (W)w);
3247 if (expect_false (!ev_is_active (w))) 4669 if (expect_false (!ev_is_active (w)))
3248 return; 4670 return;
3249 4671
… …
3260 4682
3261 EV_FREQUENT_CHECK; 4683 EV_FREQUENT_CHECK;
3262} 4684}
3263 4685
3264void 4686void
3265ev_async_send (EV_P_ ev_async *w) 4687ev_async_send (EV_P_ ev_async *w) EV_THROW
3266{ 4688{
3267 w->sent = 1; 4689 w->sent = 1;
3268 evpipe_write (EV_A_ &gotasync); 4690 evpipe_write (EV_A_ &async_pending);
3269} 4691}
3270#endif 4692#endif
3271 4693
3272/*****************************************************************************/ 4694/*****************************************************************************/
3273 4695
… …
3307 4729
3308 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4730 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3309} 4731}
3310 4732
3311void 4733void
3312ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4734ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3313{ 4735{
3314 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4736 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3315 4737
3316 if (expect_false (!once)) 4738 if (expect_false (!once))
3317 { 4739 {
3318 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4740 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3319 return; 4741 return;
3320 } 4742 }
3321 4743
3322 once->cb = cb; 4744 once->cb = cb;
3323 once->arg = arg; 4745 once->arg = arg;
… …
3338} 4760}
3339 4761
3340/*****************************************************************************/ 4762/*****************************************************************************/
3341 4763
3342#if EV_WALK_ENABLE 4764#if EV_WALK_ENABLE
3343void 4765void ecb_cold
3344ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4766ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3345{ 4767{
3346 int i, j; 4768 int i, j;
3347 ev_watcher_list *wl, *wn; 4769 ev_watcher_list *wl, *wn;
3348 4770
3349 if (types & (EV_IO | EV_EMBED)) 4771 if (types & (EV_IO | EV_EMBED))
… …
3392 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4814 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3393#endif 4815#endif
3394 4816
3395#if EV_IDLE_ENABLE 4817#if EV_IDLE_ENABLE
3396 if (types & EV_IDLE) 4818 if (types & EV_IDLE)
3397 for (j = NUMPRI; i--; ) 4819 for (j = NUMPRI; j--; )
3398 for (i = idlecnt [j]; i--; ) 4820 for (i = idlecnt [j]; i--; )
3399 cb (EV_A_ EV_IDLE, idles [j][i]); 4821 cb (EV_A_ EV_IDLE, idles [j][i]);
3400#endif 4822#endif
3401 4823
3402#if EV_FORK_ENABLE 4824#if EV_FORK_ENABLE
… …
3410 if (types & EV_ASYNC) 4832 if (types & EV_ASYNC)
3411 for (i = asynccnt; i--; ) 4833 for (i = asynccnt; i--; )
3412 cb (EV_A_ EV_ASYNC, asyncs [i]); 4834 cb (EV_A_ EV_ASYNC, asyncs [i]);
3413#endif 4835#endif
3414 4836
4837#if EV_PREPARE_ENABLE
3415 if (types & EV_PREPARE) 4838 if (types & EV_PREPARE)
3416 for (i = preparecnt; i--; ) 4839 for (i = preparecnt; i--; )
3417#if EV_EMBED_ENABLE 4840# if EV_EMBED_ENABLE
3418 if (ev_cb (prepares [i]) != embed_prepare_cb) 4841 if (ev_cb (prepares [i]) != embed_prepare_cb)
3419#endif 4842# endif
3420 cb (EV_A_ EV_PREPARE, prepares [i]); 4843 cb (EV_A_ EV_PREPARE, prepares [i]);
4844#endif
3421 4845
4846#if EV_CHECK_ENABLE
3422 if (types & EV_CHECK) 4847 if (types & EV_CHECK)
3423 for (i = checkcnt; i--; ) 4848 for (i = checkcnt; i--; )
3424 cb (EV_A_ EV_CHECK, checks [i]); 4849 cb (EV_A_ EV_CHECK, checks [i]);
4850#endif
3425 4851
4852#if EV_SIGNAL_ENABLE
3426 if (types & EV_SIGNAL) 4853 if (types & EV_SIGNAL)
3427 for (i = 0; i < signalmax; ++i) 4854 for (i = 0; i < EV_NSIG - 1; ++i)
3428 for (wl = signals [i].head; wl; ) 4855 for (wl = signals [i].head; wl; )
3429 { 4856 {
3430 wn = wl->next; 4857 wn = wl->next;
3431 cb (EV_A_ EV_SIGNAL, wl); 4858 cb (EV_A_ EV_SIGNAL, wl);
3432 wl = wn; 4859 wl = wn;
3433 } 4860 }
4861#endif
3434 4862
4863#if EV_CHILD_ENABLE
3435 if (types & EV_CHILD) 4864 if (types & EV_CHILD)
3436 for (i = EV_PID_HASHSIZE; i--; ) 4865 for (i = (EV_PID_HASHSIZE); i--; )
3437 for (wl = childs [i]; wl; ) 4866 for (wl = childs [i]; wl; )
3438 { 4867 {
3439 wn = wl->next; 4868 wn = wl->next;
3440 cb (EV_A_ EV_CHILD, wl); 4869 cb (EV_A_ EV_CHILD, wl);
3441 wl = wn; 4870 wl = wn;
3442 } 4871 }
4872#endif
3443/* EV_STAT 0x00001000 /* stat data changed */ 4873/* EV_STAT 0x00001000 /* stat data changed */
3444/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4874/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3445} 4875}
3446#endif 4876#endif
3447 4877
3448#if EV_MULTIPLICITY 4878#if EV_MULTIPLICITY
3449 #include "ev_wrap.h" 4879 #include "ev_wrap.h"
3450#endif 4880#endif
3451 4881
3452#ifdef __cplusplus
3453}
3454#endif
3455

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