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Comparing libev/ev.c (file contents):
Revision 1.327 by root, Sun Feb 14 19:09:04 2010 UTC vs.
Revision 1.392 by root, Thu Aug 4 14:37:49 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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
… …
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
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116# define EV_USE_KQUEUE 1 121# ifndef EV_USE_KQUEUE
117# else 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
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
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1 148# ifndef EV_USE_SIGNALFD
141# else
142# define EV_USE_SIGNALFD 0 149# define EV_USE_SIGNALFD EV_FEATURE_OS
143# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
144# endif 154# endif
145 155
156# if HAVE_EVENTFD
146# ifndef EV_USE_EVENTFD 157# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1 158# define EV_USE_EVENTFD EV_FEATURE_OS
149# else
150# define EV_USE_EVENTFD 0
151# endif 159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
152# endif 163# endif
153 164
154#endif 165#endif
155 166
156#include <math.h>
157#include <stdlib.h> 167#include <stdlib.h>
158#include <string.h> 168#include <string.h>
159#include <fcntl.h> 169#include <fcntl.h>
160#include <stddef.h> 170#include <stddef.h>
161 171
… …
172#ifdef EV_H 182#ifdef EV_H
173# include EV_H 183# include EV_H
174#else 184#else
175# include "ev.h" 185# include "ev.h"
176#endif 186#endif
187
188EV_CPP(extern "C" {)
177 189
178#ifndef _WIN32 190#ifndef _WIN32
179# include <sys/time.h> 191# include <sys/time.h>
180# include <sys/wait.h> 192# include <sys/wait.h>
181# include <unistd.h> 193# include <unistd.h>
… …
184# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
185# include <windows.h> 197# include <windows.h>
186# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
188# endif 200# endif
201# undef EV_AVOID_STDIO
189#endif 202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
190 211
191/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
192 213
193/* try to deduce the maximum number of signals on this platform */ 214/* try to deduce the maximum number of signals on this platform */
194#if defined (EV_NSIG) 215#if defined (EV_NSIG)
… …
206#elif defined (MAXSIG) 227#elif defined (MAXSIG)
207# define EV_NSIG (MAXSIG+1) 228# define EV_NSIG (MAXSIG+1)
208#elif defined (MAX_SIG) 229#elif defined (MAX_SIG)
209# define EV_NSIG (MAX_SIG+1) 230# define EV_NSIG (MAX_SIG+1)
210#elif defined (SIGARRAYSIZE) 231#elif defined (SIGARRAYSIZE)
211# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
212#elif defined (_sys_nsig) 233#elif defined (_sys_nsig)
213# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
214#else 235#else
215# error "unable to find value for NSIG, please report" 236# error "unable to find value for NSIG, please report"
216/* to make it compile regardless, just remove the above line */ 237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
217# define EV_NSIG 65 239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
218#endif 244#endif
219 245
220#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
221# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
222# define EV_USE_CLOCK_SYSCALL 1 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
223# else 249# else
224# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
225# endif 251# endif
226#endif 252#endif
227 253
228#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
229# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
230# define EV_USE_MONOTONIC 1 256# define EV_USE_MONOTONIC EV_FEATURE_OS
231# else 257# else
232# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
233# endif 259# endif
234#endif 260#endif
235 261
… …
237# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
238#endif 264#endif
239 265
240#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
241# if _POSIX_C_SOURCE >= 199309L 267# if _POSIX_C_SOURCE >= 199309L
242# define EV_USE_NANOSLEEP 1 268# define EV_USE_NANOSLEEP EV_FEATURE_OS
243# else 269# else
244# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
245# endif 271# endif
246#endif 272#endif
247 273
248#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
249# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
250#endif 276#endif
251 277
252#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
253# ifdef _WIN32 279# ifdef _WIN32
254# define EV_USE_POLL 0 280# define EV_USE_POLL 0
255# else 281# else
256# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
257# endif 283# endif
258#endif 284#endif
259 285
260#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
261# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
262# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
263# else 289# else
264# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
265# endif 291# endif
266#endif 292#endif
267 293
… …
273# define EV_USE_PORT 0 299# define EV_USE_PORT 0
274#endif 300#endif
275 301
276#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
277# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
278# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
279# else 305# else
280# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
281# endif 307# endif
282#endif 308#endif
283 309
284#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
285# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
286# define EV_PID_HASHSIZE 1
287# else
288# define EV_PID_HASHSIZE 16
289# endif
290#endif 312#endif
291 313
292#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
293# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
294# define EV_INOTIFY_HASHSIZE 1
295# else
296# define EV_INOTIFY_HASHSIZE 16
297# endif
298#endif 316#endif
299 317
300#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
302# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
303# else 321# else
304# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
305# endif 323# endif
306#endif 324#endif
307 325
308#ifndef EV_USE_SIGNALFD 326#ifndef EV_USE_SIGNALFD
309# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
310# define EV_USE_SIGNALFD 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
311# else 329# else
312# define EV_USE_SIGNALFD 0 330# define EV_USE_SIGNALFD 0
313# endif 331# endif
314#endif 332#endif
315 333
… …
318# define EV_USE_4HEAP 1 336# define EV_USE_4HEAP 1
319# define EV_HEAP_CACHE_AT 1 337# define EV_HEAP_CACHE_AT 1
320#endif 338#endif
321 339
322#ifndef EV_VERIFY 340#ifndef EV_VERIFY
323# define EV_VERIFY !EV_MINIMAL 341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
324#endif 342#endif
325 343
326#ifndef EV_USE_4HEAP 344#ifndef EV_USE_4HEAP
327# define EV_USE_4HEAP !EV_MINIMAL 345# define EV_USE_4HEAP EV_FEATURE_DATA
328#endif 346#endif
329 347
330#ifndef EV_HEAP_CACHE_AT 348#ifndef EV_HEAP_CACHE_AT
331# define EV_HEAP_CACHE_AT !EV_MINIMAL 349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
332#endif 350#endif
333 351
334/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
335/* which makes programs even slower. might work on other unices, too. */ 353/* which makes programs even slower. might work on other unices, too. */
336#if EV_USE_CLOCK_SYSCALL 354#if EV_USE_CLOCK_SYSCALL
… …
367# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
368# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
369#endif 387#endif
370 388
371#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
372# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
373# include <sys/select.h> 392# include <sys/select.h>
374# endif 393# endif
375#endif 394#endif
376 395
377#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
378# include <sys/utsname.h>
379# include <sys/statfs.h> 397# include <sys/statfs.h>
380# include <sys/inotify.h> 398# include <sys/inotify.h>
381/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
382# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
383# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
400# define EFD_CLOEXEC O_CLOEXEC 418# define EFD_CLOEXEC O_CLOEXEC
401# else 419# else
402# define EFD_CLOEXEC 02000000 420# define EFD_CLOEXEC 02000000
403# endif 421# endif
404# endif 422# endif
405# ifdef __cplusplus
406extern "C" {
407# endif
408int eventfd (unsigned int initval, int flags); 423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
409# ifdef __cplusplus
410}
411# endif
412#endif 424#endif
413 425
414#if EV_USE_SIGNALFD 426#if EV_USE_SIGNALFD
415/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
416# include <stdint.h> 428# include <stdint.h>
… …
422# define SFD_CLOEXEC O_CLOEXEC 434# define SFD_CLOEXEC O_CLOEXEC
423# else 435# else
424# define SFD_CLOEXEC 02000000 436# define SFD_CLOEXEC 02000000
425# endif 437# endif
426# endif 438# endif
427# ifdef __cplusplus
428extern "C" {
429# endif
430int signalfd (int fd, const sigset_t *mask, int flags); 439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
431 440
432struct signalfd_siginfo 441struct signalfd_siginfo
433{ 442{
434 uint32_t ssi_signo; 443 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)]; 444 char pad[128 - sizeof (uint32_t)];
436}; 445};
437# ifdef __cplusplus
438}
439# endif 446#endif
440#endif
441
442 447
443/**/ 448/**/
444 449
445#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
446# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
447#else 452#else
448# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
449#endif 454#endif
450 455
451/* 456/*
452 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
453 * It is added to ev_rt_now when scheduling periodics
454 * to ensure progress, time-wise, even when rounding
455 * errors are against us.
456 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
457 * Better solutions welcome.
458 */ 459 */
459#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
460 462
461#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
462#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
463 465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ECB.H BEGIN */
471/*
472 * libecb - http://software.schmorp.de/pkg/libecb
473 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved.
477 *
478 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met:
480 *
481 * 1. Redistributions of source code must retain the above copyright notice,
482 * this list of conditions and the following disclaimer.
483 *
484 * 2. Redistributions in binary form must reproduce the above copyright
485 * notice, this list of conditions and the following disclaimer in the
486 * documentation and/or other materials provided with the distribution.
487 *
488 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
489 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
490 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
491 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
492 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE.
498 */
499
500#ifndef ECB_H
501#define ECB_H
502
503#ifdef _WIN32
504 typedef signed char int8_t;
505 typedef unsigned char uint8_t;
506 typedef signed short int16_t;
507 typedef unsigned short uint16_t;
508 typedef signed int int32_t;
509 typedef unsigned int uint32_t;
464#if __GNUC__ >= 4 510 #if __GNUC__
465# define expect(expr,value) __builtin_expect ((expr),(value)) 511 typedef signed long long int64_t;
466# define noinline __attribute__ ((noinline)) 512 typedef unsigned long long uint64_t;
513 #else /* _MSC_VER || __BORLANDC__ */
514 typedef signed __int64 int64_t;
515 typedef unsigned __int64 uint64_t;
516 #endif
467#else 517#else
468# define expect(expr,value) (expr) 518 #include <inttypes.h>
469# define noinline
470# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
471# define inline
472# endif 519#endif
520
521/* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place.
527 */
528#ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
530 #define ECB_GCC_VERSION(major,minor) 0
531 #else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
473#endif 533 #endif
534#endif
474 535
536/*****************************************************************************/
537
538/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540
541#if ECB_NO_THREADS || ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0)
543 #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0)
544 #define ECB_MEMORY_FENCE_RELEASE do { } while (0)
545#endif
546
547#ifndef ECB_MEMORY_FENCE
548 #if ECB_GCC_VERSION(2,5)
549 #if __x86
550 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
551 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
552 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
553 #elif __amd64
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
555 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
556 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
557 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
558 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
559 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
560 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \
561 || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
562 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
563 #define ECB_MEMORY_FENCE \
564 do { \
565 int null = 0; \
566 __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \
567 while (0)
568 #endif
569 #endif
570#endif
571
572#ifndef ECB_MEMORY_FENCE
573 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
574 #define ECB_MEMORY_FENCE __sync_synchronize ()
575 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
576 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
577 #elif _MSC_VER >= 1400 /* VC++ 2005 */
578 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
579 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
580 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
581 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
582 #elif defined(_WIN32)
583 #include <WinNT.h>
584 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
585 #endif
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if !ECB_AVOID_PTHREADS
590 /*
591 * if you get undefined symbol references to pthread_mutex_lock,
592 * or failure to find pthread.h, then you should implement
593 * the ECB_MEMORY_FENCE operations for your cpu/compiler
594 * OR provide pthread.h and link against the posix thread library
595 * of your system.
596 */
597 #include <pthread.h>
598 #define ECB_NEEDS_PTHREADS 1
599 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
600
601 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
602 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
603 #endif
604#endif
605
606#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
607 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
608#endif
609
610#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
611 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
612#endif
613
614/*****************************************************************************/
615
616#define ECB_C99 (__STDC_VERSION__ >= 199901L)
617
618#if __cplusplus
619 #define ecb_inline static inline
620#elif ECB_GCC_VERSION(2,5)
621 #define ecb_inline static __inline__
622#elif ECB_C99
623 #define ecb_inline static inline
624#else
625 #define ecb_inline static
626#endif
627
628#if ECB_GCC_VERSION(3,3)
629 #define ecb_restrict __restrict__
630#elif ECB_C99
631 #define ecb_restrict restrict
632#else
633 #define ecb_restrict
634#endif
635
636typedef int ecb_bool;
637
638#define ECB_CONCAT_(a, b) a ## b
639#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
640#define ECB_STRINGIFY_(a) # a
641#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
642
643#define ecb_function_ ecb_inline
644
645#if ECB_GCC_VERSION(3,1)
646 #define ecb_attribute(attrlist) __attribute__(attrlist)
647 #define ecb_is_constant(expr) __builtin_constant_p (expr)
648 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
649 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
650#else
651 #define ecb_attribute(attrlist)
652 #define ecb_is_constant(expr) 0
653 #define ecb_expect(expr,value) (expr)
654 #define ecb_prefetch(addr,rw,locality)
655#endif
656
657/* no emulation for ecb_decltype */
658#if ECB_GCC_VERSION(4,5)
659 #define ecb_decltype(x) __decltype(x)
660#elif ECB_GCC_VERSION(3,0)
661 #define ecb_decltype(x) __typeof(x)
662#endif
663
664#define ecb_noinline ecb_attribute ((__noinline__))
665#define ecb_noreturn ecb_attribute ((__noreturn__))
666#define ecb_unused ecb_attribute ((__unused__))
667#define ecb_const ecb_attribute ((__const__))
668#define ecb_pure ecb_attribute ((__pure__))
669
670#if ECB_GCC_VERSION(4,3)
671 #define ecb_artificial ecb_attribute ((__artificial__))
672 #define ecb_hot ecb_attribute ((__hot__))
673 #define ecb_cold ecb_attribute ((__cold__))
674#else
675 #define ecb_artificial
676 #define ecb_hot
677 #define ecb_cold
678#endif
679
680/* put around conditional expressions if you are very sure that the */
681/* expression is mostly true or mostly false. note that these return */
682/* booleans, not the expression. */
475#define expect_false(expr) expect ((expr) != 0, 0) 683#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
476#define expect_true(expr) expect ((expr) != 0, 1) 684#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
685/* for compatibility to the rest of the world */
686#define ecb_likely(expr) ecb_expect_true (expr)
687#define ecb_unlikely(expr) ecb_expect_false (expr)
688
689/* count trailing zero bits and count # of one bits */
690#if ECB_GCC_VERSION(3,4)
691 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
692 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
693 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
694 #define ecb_ctz32(x) __builtin_ctz (x)
695 #define ecb_ctz64(x) __builtin_ctzll (x)
696 #define ecb_popcount32(x) __builtin_popcount (x)
697 /* no popcountll */
698#else
699 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
700 ecb_function_ int
701 ecb_ctz32 (uint32_t x)
702 {
703 int r = 0;
704
705 x &= ~x + 1; /* this isolates the lowest bit */
706
707#if ECB_branchless_on_i386
708 r += !!(x & 0xaaaaaaaa) << 0;
709 r += !!(x & 0xcccccccc) << 1;
710 r += !!(x & 0xf0f0f0f0) << 2;
711 r += !!(x & 0xff00ff00) << 3;
712 r += !!(x & 0xffff0000) << 4;
713#else
714 if (x & 0xaaaaaaaa) r += 1;
715 if (x & 0xcccccccc) r += 2;
716 if (x & 0xf0f0f0f0) r += 4;
717 if (x & 0xff00ff00) r += 8;
718 if (x & 0xffff0000) r += 16;
719#endif
720
721 return r;
722 }
723
724 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz64 (uint64_t x)
727 {
728 int shift = x & 0xffffffffU ? 0 : 32;
729 return ecb_ctz32 (x >> shift) + shift;
730 }
731
732 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
733 ecb_function_ int
734 ecb_popcount32 (uint32_t x)
735 {
736 x -= (x >> 1) & 0x55555555;
737 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
738 x = ((x >> 4) + x) & 0x0f0f0f0f;
739 x *= 0x01010101;
740
741 return x >> 24;
742 }
743
744 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
745 ecb_function_ int ecb_ld32 (uint32_t x)
746 {
747 int r = 0;
748
749 if (x >> 16) { x >>= 16; r += 16; }
750 if (x >> 8) { x >>= 8; r += 8; }
751 if (x >> 4) { x >>= 4; r += 4; }
752 if (x >> 2) { x >>= 2; r += 2; }
753 if (x >> 1) { r += 1; }
754
755 return r;
756 }
757
758 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
759 ecb_function_ int ecb_ld64 (uint64_t x)
760 {
761 int r = 0;
762
763 if (x >> 32) { x >>= 32; r += 32; }
764
765 return r + ecb_ld32 (x);
766 }
767#endif
768
769/* popcount64 is only available on 64 bit cpus as gcc builtin */
770/* so for this version we are lazy */
771ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
772ecb_function_ int
773ecb_popcount64 (uint64_t x)
774{
775 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
776}
777
778ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
779ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
780ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
781ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
782ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
783ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
784ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
785ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
786
787ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
788ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
789ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
790ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
791ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
792ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
793ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
794ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
795
796#if ECB_GCC_VERSION(4,3)
797 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
798 #define ecb_bswap32(x) __builtin_bswap32 (x)
799 #define ecb_bswap64(x) __builtin_bswap64 (x)
800#else
801 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
802 ecb_function_ uint16_t
803 ecb_bswap16 (uint16_t x)
804 {
805 return ecb_rotl16 (x, 8);
806 }
807
808 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
809 ecb_function_ uint32_t
810 ecb_bswap32 (uint32_t x)
811 {
812 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
813 }
814
815 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
816 ecb_function_ uint64_t
817 ecb_bswap64 (uint64_t x)
818 {
819 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
820 }
821#endif
822
823#if ECB_GCC_VERSION(4,5)
824 #define ecb_unreachable() __builtin_unreachable ()
825#else
826 /* this seems to work fine, but gcc always emits a warning for it :/ */
827 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
828 ecb_function_ void ecb_unreachable (void) { }
829#endif
830
831/* try to tell the compiler that some condition is definitely true */
832#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
833
834ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
835ecb_function_ unsigned char
836ecb_byteorder_helper (void)
837{
838 const uint32_t u = 0x11223344;
839 return *(unsigned char *)&u;
840}
841
842ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
843ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
844ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
845ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
846
847#if ECB_GCC_VERSION(3,0) || ECB_C99
848 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
849#else
850 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
851#endif
852
853#if ecb_cplusplus_does_not_suck
854 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
855 template<typename T, int N>
856 static inline int ecb_array_length (const T (&arr)[N])
857 {
858 return N;
859 }
860#else
861 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
862#endif
863
864#endif
865
866/* ECB.H END */
867
868#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
869# undef ECB_MEMORY_FENCE
870# undef ECB_MEMORY_FENCE_ACQUIRE
871# undef ECB_MEMORY_FENCE_RELEASE
872#endif
873
874#define expect_false(cond) ecb_expect_false (cond)
875#define expect_true(cond) ecb_expect_true (cond)
876#define noinline ecb_noinline
877
477#define inline_size static inline 878#define inline_size ecb_inline
478 879
479#if EV_MINIMAL 880#if EV_FEATURE_CODE
881# define inline_speed ecb_inline
882#else
480# define inline_speed static noinline 883# define inline_speed static noinline
481#else
482# define inline_speed static inline
483#endif 884#endif
484 885
485#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 886#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
486 887
487#if EV_MINPRI == EV_MAXPRI 888#if EV_MINPRI == EV_MAXPRI
… …
500#define ev_active(w) ((W)(w))->active 901#define ev_active(w) ((W)(w))->active
501#define ev_at(w) ((WT)(w))->at 902#define ev_at(w) ((WT)(w))->at
502 903
503#if EV_USE_REALTIME 904#if EV_USE_REALTIME
504/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 905/* sig_atomic_t is used to avoid per-thread variables or locking but still */
505/* giving it a reasonably high chance of working on typical architetcures */ 906/* giving it a reasonably high chance of working on typical architectures */
506static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 907static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
507#endif 908#endif
508 909
509#if EV_USE_MONOTONIC 910#if EV_USE_MONOTONIC
510static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 911static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
524# include "ev_win32.c" 925# include "ev_win32.c"
525#endif 926#endif
526 927
527/*****************************************************************************/ 928/*****************************************************************************/
528 929
930/* define a suitable floor function (only used by periodics atm) */
931
932#if EV_USE_FLOOR
933# include <math.h>
934# define ev_floor(v) floor (v)
935#else
936
937#include <float.h>
938
939/* a floor() replacement function, should be independent of ev_tstamp type */
940static ev_tstamp noinline
941ev_floor (ev_tstamp v)
942{
943 /* the choice of shift factor is not terribly important */
944#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
945 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
946#else
947 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
948#endif
949
950 /* argument too large for an unsigned long? */
951 if (expect_false (v >= shift))
952 {
953 ev_tstamp f;
954
955 if (v == v - 1.)
956 return v; /* very large number */
957
958 f = shift * ev_floor (v * (1. / shift));
959 return f + ev_floor (v - f);
960 }
961
962 /* special treatment for negative args? */
963 if (expect_false (v < 0.))
964 {
965 ev_tstamp f = -ev_floor (-v);
966
967 return f - (f == v ? 0 : 1);
968 }
969
970 /* fits into an unsigned long */
971 return (unsigned long)v;
972}
973
974#endif
975
976/*****************************************************************************/
977
978#ifdef __linux
979# include <sys/utsname.h>
980#endif
981
982static unsigned int noinline ecb_cold
983ev_linux_version (void)
984{
985#ifdef __linux
986 unsigned int v = 0;
987 struct utsname buf;
988 int i;
989 char *p = buf.release;
990
991 if (uname (&buf))
992 return 0;
993
994 for (i = 3+1; --i; )
995 {
996 unsigned int c = 0;
997
998 for (;;)
999 {
1000 if (*p >= '0' && *p <= '9')
1001 c = c * 10 + *p++ - '0';
1002 else
1003 {
1004 p += *p == '.';
1005 break;
1006 }
1007 }
1008
1009 v = (v << 8) | c;
1010 }
1011
1012 return v;
1013#else
1014 return 0;
1015#endif
1016}
1017
1018/*****************************************************************************/
1019
1020#if EV_AVOID_STDIO
1021static void noinline ecb_cold
1022ev_printerr (const char *msg)
1023{
1024 write (STDERR_FILENO, msg, strlen (msg));
1025}
1026#endif
1027
529static void (*syserr_cb)(const char *msg); 1028static void (*syserr_cb)(const char *msg);
530 1029
531void 1030void ecb_cold
532ev_set_syserr_cb (void (*cb)(const char *msg)) 1031ev_set_syserr_cb (void (*cb)(const char *msg))
533{ 1032{
534 syserr_cb = cb; 1033 syserr_cb = cb;
535} 1034}
536 1035
537static void noinline 1036static void noinline ecb_cold
538ev_syserr (const char *msg) 1037ev_syserr (const char *msg)
539{ 1038{
540 if (!msg) 1039 if (!msg)
541 msg = "(libev) system error"; 1040 msg = "(libev) system error";
542 1041
543 if (syserr_cb) 1042 if (syserr_cb)
544 syserr_cb (msg); 1043 syserr_cb (msg);
545 else 1044 else
546 { 1045 {
1046#if EV_AVOID_STDIO
1047 ev_printerr (msg);
1048 ev_printerr (": ");
1049 ev_printerr (strerror (errno));
1050 ev_printerr ("\n");
1051#else
547 perror (msg); 1052 perror (msg);
1053#endif
548 abort (); 1054 abort ();
549 } 1055 }
550} 1056}
551 1057
552static void * 1058static void *
553ev_realloc_emul (void *ptr, long size) 1059ev_realloc_emul (void *ptr, long size)
554{ 1060{
1061#if __GLIBC__
1062 return realloc (ptr, size);
1063#else
555 /* some systems, notably openbsd and darwin, fail to properly 1064 /* some systems, notably openbsd and darwin, fail to properly
556 * implement realloc (x, 0) (as required by both ansi c-98 and 1065 * implement realloc (x, 0) (as required by both ansi c-89 and
557 * the single unix specification, so work around them here. 1066 * the single unix specification, so work around them here.
558 */ 1067 */
559 1068
560 if (size) 1069 if (size)
561 return realloc (ptr, size); 1070 return realloc (ptr, size);
562 1071
563 free (ptr); 1072 free (ptr);
564 return 0; 1073 return 0;
1074#endif
565} 1075}
566 1076
567static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1077static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
568 1078
569void 1079void ecb_cold
570ev_set_allocator (void *(*cb)(void *ptr, long size)) 1080ev_set_allocator (void *(*cb)(void *ptr, long size))
571{ 1081{
572 alloc = cb; 1082 alloc = cb;
573} 1083}
574 1084
… …
577{ 1087{
578 ptr = alloc (ptr, size); 1088 ptr = alloc (ptr, size);
579 1089
580 if (!ptr && size) 1090 if (!ptr && size)
581 { 1091 {
1092#if EV_AVOID_STDIO
1093 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1094#else
582 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1095 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1096#endif
583 abort (); 1097 abort ();
584 } 1098 }
585 1099
586 return ptr; 1100 return ptr;
587} 1101}
… …
603 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1117 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
604 unsigned char unused; 1118 unsigned char unused;
605#if EV_USE_EPOLL 1119#if EV_USE_EPOLL
606 unsigned int egen; /* generation counter to counter epoll bugs */ 1120 unsigned int egen; /* generation counter to counter epoll bugs */
607#endif 1121#endif
608#if EV_SELECT_IS_WINSOCKET 1122#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
609 SOCKET handle; 1123 SOCKET handle;
1124#endif
1125#if EV_USE_IOCP
1126 OVERLAPPED or, ow;
610#endif 1127#endif
611} ANFD; 1128} ANFD;
612 1129
613/* stores the pending event set for a given watcher */ 1130/* stores the pending event set for a given watcher */
614typedef struct 1131typedef struct
… …
669 1186
670 static int ev_default_loop_ptr; 1187 static int ev_default_loop_ptr;
671 1188
672#endif 1189#endif
673 1190
674#if EV_MINIMAL < 2 1191#if EV_FEATURE_API
675# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1192# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
676# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 1193# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
677# define EV_INVOKE_PENDING invoke_cb (EV_A) 1194# define EV_INVOKE_PENDING invoke_cb (EV_A)
678#else 1195#else
679# define EV_RELEASE_CB (void)0 1196# define EV_RELEASE_CB (void)0
680# define EV_ACQUIRE_CB (void)0 1197# define EV_ACQUIRE_CB (void)0
681# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1198# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
682#endif 1199#endif
683 1200
684#define EVUNLOOP_RECURSE 0x80 1201#define EVBREAK_RECURSE 0x80
685 1202
686/*****************************************************************************/ 1203/*****************************************************************************/
687 1204
688#ifndef EV_HAVE_EV_TIME 1205#ifndef EV_HAVE_EV_TIME
689ev_tstamp 1206ev_tstamp
… …
733 if (delay > 0.) 1250 if (delay > 0.)
734 { 1251 {
735#if EV_USE_NANOSLEEP 1252#if EV_USE_NANOSLEEP
736 struct timespec ts; 1253 struct timespec ts;
737 1254
738 ts.tv_sec = (time_t)delay; 1255 EV_TS_SET (ts, delay);
739 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
740
741 nanosleep (&ts, 0); 1256 nanosleep (&ts, 0);
742#elif defined(_WIN32) 1257#elif defined(_WIN32)
743 Sleep ((unsigned long)(delay * 1e3)); 1258 Sleep ((unsigned long)(delay * 1e3));
744#else 1259#else
745 struct timeval tv; 1260 struct timeval tv;
746 1261
747 tv.tv_sec = (time_t)delay;
748 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
749
750 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1262 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
751 /* something not guaranteed by newer posix versions, but guaranteed */ 1263 /* something not guaranteed by newer posix versions, but guaranteed */
752 /* by older ones */ 1264 /* by older ones */
1265 EV_TV_SET (tv, delay);
753 select (0, 0, 0, 0, &tv); 1266 select (0, 0, 0, 0, &tv);
754#endif 1267#endif
755 } 1268 }
756} 1269}
757 1270
758/*****************************************************************************/ 1271/*****************************************************************************/
759 1272
760#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1273#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
761 1274
762/* find a suitable new size for the given array, */ 1275/* find a suitable new size for the given array, */
763/* hopefully by rounding to a ncie-to-malloc size */ 1276/* hopefully by rounding to a nice-to-malloc size */
764inline_size int 1277inline_size int
765array_nextsize (int elem, int cur, int cnt) 1278array_nextsize (int elem, int cur, int cnt)
766{ 1279{
767 int ncur = cur + 1; 1280 int ncur = cur + 1;
768 1281
… …
780 } 1293 }
781 1294
782 return ncur; 1295 return ncur;
783} 1296}
784 1297
785static noinline void * 1298static void * noinline ecb_cold
786array_realloc (int elem, void *base, int *cur, int cnt) 1299array_realloc (int elem, void *base, int *cur, int cnt)
787{ 1300{
788 *cur = array_nextsize (elem, *cur, cnt); 1301 *cur = array_nextsize (elem, *cur, cnt);
789 return ev_realloc (base, elem * *cur); 1302 return ev_realloc (base, elem * *cur);
790} 1303}
… …
793 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1306 memset ((void *)(base), 0, sizeof (*(base)) * (count))
794 1307
795#define array_needsize(type,base,cur,cnt,init) \ 1308#define array_needsize(type,base,cur,cnt,init) \
796 if (expect_false ((cnt) > (cur))) \ 1309 if (expect_false ((cnt) > (cur))) \
797 { \ 1310 { \
798 int ocur_ = (cur); \ 1311 int ecb_unused ocur_ = (cur); \
799 (base) = (type *)array_realloc \ 1312 (base) = (type *)array_realloc \
800 (sizeof (type), (base), &(cur), (cnt)); \ 1313 (sizeof (type), (base), &(cur), (cnt)); \
801 init ((base) + (ocur_), (cur) - ocur_); \ 1314 init ((base) + (ocur_), (cur) - ocur_); \
802 } 1315 }
803 1316
… …
864} 1377}
865 1378
866/*****************************************************************************/ 1379/*****************************************************************************/
867 1380
868inline_speed void 1381inline_speed void
869fd_event_nc (EV_P_ int fd, int revents) 1382fd_event_nocheck (EV_P_ int fd, int revents)
870{ 1383{
871 ANFD *anfd = anfds + fd; 1384 ANFD *anfd = anfds + fd;
872 ev_io *w; 1385 ev_io *w;
873 1386
874 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1387 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
886fd_event (EV_P_ int fd, int revents) 1399fd_event (EV_P_ int fd, int revents)
887{ 1400{
888 ANFD *anfd = anfds + fd; 1401 ANFD *anfd = anfds + fd;
889 1402
890 if (expect_true (!anfd->reify)) 1403 if (expect_true (!anfd->reify))
891 fd_event_nc (EV_A_ fd, revents); 1404 fd_event_nocheck (EV_A_ fd, revents);
892} 1405}
893 1406
894void 1407void
895ev_feed_fd_event (EV_P_ int fd, int revents) 1408ev_feed_fd_event (EV_P_ int fd, int revents)
896{ 1409{
897 if (fd >= 0 && fd < anfdmax) 1410 if (fd >= 0 && fd < anfdmax)
898 fd_event_nc (EV_A_ fd, revents); 1411 fd_event_nocheck (EV_A_ fd, revents);
899} 1412}
900 1413
901/* make sure the external fd watch events are in-sync */ 1414/* make sure the external fd watch events are in-sync */
902/* with the kernel/libev internal state */ 1415/* with the kernel/libev internal state */
903inline_size void 1416inline_size void
904fd_reify (EV_P) 1417fd_reify (EV_P)
905{ 1418{
906 int i; 1419 int i;
907 1420
1421#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1422 for (i = 0; i < fdchangecnt; ++i)
1423 {
1424 int fd = fdchanges [i];
1425 ANFD *anfd = anfds + fd;
1426
1427 if (anfd->reify & EV__IOFDSET && anfd->head)
1428 {
1429 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1430
1431 if (handle != anfd->handle)
1432 {
1433 unsigned long arg;
1434
1435 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1436
1437 /* handle changed, but fd didn't - we need to do it in two steps */
1438 backend_modify (EV_A_ fd, anfd->events, 0);
1439 anfd->events = 0;
1440 anfd->handle = handle;
1441 }
1442 }
1443 }
1444#endif
1445
908 for (i = 0; i < fdchangecnt; ++i) 1446 for (i = 0; i < fdchangecnt; ++i)
909 { 1447 {
910 int fd = fdchanges [i]; 1448 int fd = fdchanges [i];
911 ANFD *anfd = anfds + fd; 1449 ANFD *anfd = anfds + fd;
912 ev_io *w; 1450 ev_io *w;
913 1451
914 unsigned char events = 0; 1452 unsigned char o_events = anfd->events;
1453 unsigned char o_reify = anfd->reify;
915 1454
916 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1455 anfd->reify = 0;
917 events |= (unsigned char)w->events;
918 1456
919#if EV_SELECT_IS_WINSOCKET 1457 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
920 if (events)
921 { 1458 {
922 unsigned long arg; 1459 anfd->events = 0;
923 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1460
924 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1461 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1462 anfd->events |= (unsigned char)w->events;
1463
1464 if (o_events != anfd->events)
1465 o_reify = EV__IOFDSET; /* actually |= */
925 } 1466 }
926#endif
927 1467
928 { 1468 if (o_reify & EV__IOFDSET)
929 unsigned char o_events = anfd->events;
930 unsigned char o_reify = anfd->reify;
931
932 anfd->reify = 0;
933 anfd->events = events;
934
935 if (o_events != events || o_reify & EV__IOFDSET)
936 backend_modify (EV_A_ fd, o_events, events); 1469 backend_modify (EV_A_ fd, o_events, anfd->events);
937 }
938 } 1470 }
939 1471
940 fdchangecnt = 0; 1472 fdchangecnt = 0;
941} 1473}
942 1474
… …
954 fdchanges [fdchangecnt - 1] = fd; 1486 fdchanges [fdchangecnt - 1] = fd;
955 } 1487 }
956} 1488}
957 1489
958/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1490/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
959inline_speed void 1491inline_speed void ecb_cold
960fd_kill (EV_P_ int fd) 1492fd_kill (EV_P_ int fd)
961{ 1493{
962 ev_io *w; 1494 ev_io *w;
963 1495
964 while ((w = (ev_io *)anfds [fd].head)) 1496 while ((w = (ev_io *)anfds [fd].head))
… …
966 ev_io_stop (EV_A_ w); 1498 ev_io_stop (EV_A_ w);
967 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1499 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
968 } 1500 }
969} 1501}
970 1502
971/* check whether the given fd is atcually valid, for error recovery */ 1503/* check whether the given fd is actually valid, for error recovery */
972inline_size int 1504inline_size int ecb_cold
973fd_valid (int fd) 1505fd_valid (int fd)
974{ 1506{
975#ifdef _WIN32 1507#ifdef _WIN32
976 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1508 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
977#else 1509#else
978 return fcntl (fd, F_GETFD) != -1; 1510 return fcntl (fd, F_GETFD) != -1;
979#endif 1511#endif
980} 1512}
981 1513
982/* called on EBADF to verify fds */ 1514/* called on EBADF to verify fds */
983static void noinline 1515static void noinline ecb_cold
984fd_ebadf (EV_P) 1516fd_ebadf (EV_P)
985{ 1517{
986 int fd; 1518 int fd;
987 1519
988 for (fd = 0; fd < anfdmax; ++fd) 1520 for (fd = 0; fd < anfdmax; ++fd)
… …
990 if (!fd_valid (fd) && errno == EBADF) 1522 if (!fd_valid (fd) && errno == EBADF)
991 fd_kill (EV_A_ fd); 1523 fd_kill (EV_A_ fd);
992} 1524}
993 1525
994/* called on ENOMEM in select/poll to kill some fds and retry */ 1526/* called on ENOMEM in select/poll to kill some fds and retry */
995static void noinline 1527static void noinline ecb_cold
996fd_enomem (EV_P) 1528fd_enomem (EV_P)
997{ 1529{
998 int fd; 1530 int fd;
999 1531
1000 for (fd = anfdmax; fd--; ) 1532 for (fd = anfdmax; fd--; )
… …
1018 anfds [fd].emask = 0; 1550 anfds [fd].emask = 0;
1019 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 1551 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1020 } 1552 }
1021} 1553}
1022 1554
1555/* used to prepare libev internal fd's */
1556/* this is not fork-safe */
1557inline_speed void
1558fd_intern (int fd)
1559{
1560#ifdef _WIN32
1561 unsigned long arg = 1;
1562 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1563#else
1564 fcntl (fd, F_SETFD, FD_CLOEXEC);
1565 fcntl (fd, F_SETFL, O_NONBLOCK);
1566#endif
1567}
1568
1023/*****************************************************************************/ 1569/*****************************************************************************/
1024 1570
1025/* 1571/*
1026 * the heap functions want a real array index. array index 0 uis guaranteed to not 1572 * the heap functions want a real array index. array index 0 is guaranteed to not
1027 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1573 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1028 * the branching factor of the d-tree. 1574 * the branching factor of the d-tree.
1029 */ 1575 */
1030 1576
1031/* 1577/*
… …
1179 1725
1180static ANSIG signals [EV_NSIG - 1]; 1726static ANSIG signals [EV_NSIG - 1];
1181 1727
1182/*****************************************************************************/ 1728/*****************************************************************************/
1183 1729
1184/* used to prepare libev internal fd's */ 1730#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1185/* this is not fork-safe */
1186inline_speed void
1187fd_intern (int fd)
1188{
1189#ifdef _WIN32
1190 unsigned long arg = 1;
1191 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1192#else
1193 fcntl (fd, F_SETFD, FD_CLOEXEC);
1194 fcntl (fd, F_SETFL, O_NONBLOCK);
1195#endif
1196}
1197 1731
1198static void noinline 1732static void noinline ecb_cold
1199evpipe_init (EV_P) 1733evpipe_init (EV_P)
1200{ 1734{
1201 if (!ev_is_active (&pipe_w)) 1735 if (!ev_is_active (&pipe_w))
1202 { 1736 {
1203#if EV_USE_EVENTFD 1737# if EV_USE_EVENTFD
1204 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 1738 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1205 if (evfd < 0 && errno == EINVAL) 1739 if (evfd < 0 && errno == EINVAL)
1206 evfd = eventfd (0, 0); 1740 evfd = eventfd (0, 0);
1207 1741
1208 if (evfd >= 0) 1742 if (evfd >= 0)
… …
1210 evpipe [0] = -1; 1744 evpipe [0] = -1;
1211 fd_intern (evfd); /* doing it twice doesn't hurt */ 1745 fd_intern (evfd); /* doing it twice doesn't hurt */
1212 ev_io_set (&pipe_w, evfd, EV_READ); 1746 ev_io_set (&pipe_w, evfd, EV_READ);
1213 } 1747 }
1214 else 1748 else
1215#endif 1749# endif
1216 { 1750 {
1217 while (pipe (evpipe)) 1751 while (pipe (evpipe))
1218 ev_syserr ("(libev) error creating signal/async pipe"); 1752 ev_syserr ("(libev) error creating signal/async pipe");
1219 1753
1220 fd_intern (evpipe [0]); 1754 fd_intern (evpipe [0]);
… …
1225 ev_io_start (EV_A_ &pipe_w); 1759 ev_io_start (EV_A_ &pipe_w);
1226 ev_unref (EV_A); /* watcher should not keep loop alive */ 1760 ev_unref (EV_A); /* watcher should not keep loop alive */
1227 } 1761 }
1228} 1762}
1229 1763
1230inline_size void 1764inline_speed void
1231evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1765evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1232{ 1766{
1233 if (!*flag) 1767 if (expect_true (*flag))
1768 return;
1769
1770 *flag = 1;
1771
1772 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1773
1774 pipe_write_skipped = 1;
1775
1776 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1777
1778 if (pipe_write_wanted)
1234 { 1779 {
1780 int old_errno;
1781
1782 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1783
1235 int old_errno = errno; /* save errno because write might clobber it */ 1784 old_errno = errno; /* save errno because write will clobber it */
1236
1237 *flag = 1;
1238 1785
1239#if EV_USE_EVENTFD 1786#if EV_USE_EVENTFD
1240 if (evfd >= 0) 1787 if (evfd >= 0)
1241 { 1788 {
1242 uint64_t counter = 1; 1789 uint64_t counter = 1;
1243 write (evfd, &counter, sizeof (uint64_t)); 1790 write (evfd, &counter, sizeof (uint64_t));
1244 } 1791 }
1245 else 1792 else
1246#endif 1793#endif
1794 {
1795 /* win32 people keep sending patches that change this write() to send() */
1796 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1797 /* so when you think this write should be a send instead, please find out */
1798 /* where your send() is from - it's definitely not the microsoft send, and */
1799 /* tell me. thank you. */
1247 write (evpipe [1], &old_errno, 1); 1800 write (evpipe [1], &(evpipe [1]), 1);
1801 }
1248 1802
1249 errno = old_errno; 1803 errno = old_errno;
1250 } 1804 }
1251} 1805}
1252 1806
… …
1255static void 1809static void
1256pipecb (EV_P_ ev_io *iow, int revents) 1810pipecb (EV_P_ ev_io *iow, int revents)
1257{ 1811{
1258 int i; 1812 int i;
1259 1813
1814 if (revents & EV_READ)
1815 {
1260#if EV_USE_EVENTFD 1816#if EV_USE_EVENTFD
1261 if (evfd >= 0) 1817 if (evfd >= 0)
1262 { 1818 {
1263 uint64_t counter; 1819 uint64_t counter;
1264 read (evfd, &counter, sizeof (uint64_t)); 1820 read (evfd, &counter, sizeof (uint64_t));
1265 } 1821 }
1266 else 1822 else
1267#endif 1823#endif
1268 { 1824 {
1269 char dummy; 1825 char dummy;
1826 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1270 read (evpipe [0], &dummy, 1); 1827 read (evpipe [0], &dummy, 1);
1828 }
1271 } 1829 }
1272 1830
1831 pipe_write_skipped = 0;
1832
1833#if EV_SIGNAL_ENABLE
1273 if (sig_pending) 1834 if (sig_pending)
1274 { 1835 {
1275 sig_pending = 0; 1836 sig_pending = 0;
1276 1837
1277 for (i = EV_NSIG - 1; i--; ) 1838 for (i = EV_NSIG - 1; i--; )
1278 if (expect_false (signals [i].pending)) 1839 if (expect_false (signals [i].pending))
1279 ev_feed_signal_event (EV_A_ i + 1); 1840 ev_feed_signal_event (EV_A_ i + 1);
1280 } 1841 }
1842#endif
1281 1843
1282#if EV_ASYNC_ENABLE 1844#if EV_ASYNC_ENABLE
1283 if (async_pending) 1845 if (async_pending)
1284 { 1846 {
1285 async_pending = 0; 1847 async_pending = 0;
… …
1294#endif 1856#endif
1295} 1857}
1296 1858
1297/*****************************************************************************/ 1859/*****************************************************************************/
1298 1860
1861void
1862ev_feed_signal (int signum)
1863{
1864#if EV_MULTIPLICITY
1865 EV_P = signals [signum - 1].loop;
1866
1867 if (!EV_A)
1868 return;
1869#endif
1870
1871 if (!ev_active (&pipe_w))
1872 return;
1873
1874 signals [signum - 1].pending = 1;
1875 evpipe_write (EV_A_ &sig_pending);
1876}
1877
1299static void 1878static void
1300ev_sighandler (int signum) 1879ev_sighandler (int signum)
1301{ 1880{
1302#if EV_MULTIPLICITY
1303 EV_P = signals [signum - 1].loop;
1304#endif
1305
1306#ifdef _WIN32 1881#ifdef _WIN32
1307 signal (signum, ev_sighandler); 1882 signal (signum, ev_sighandler);
1308#endif 1883#endif
1309 1884
1310 signals [signum - 1].pending = 1; 1885 ev_feed_signal (signum);
1311 evpipe_write (EV_A_ &sig_pending);
1312} 1886}
1313 1887
1314void noinline 1888void noinline
1315ev_feed_signal_event (EV_P_ int signum) 1889ev_feed_signal_event (EV_P_ int signum)
1316{ 1890{
… …
1353 break; 1927 break;
1354 } 1928 }
1355} 1929}
1356#endif 1930#endif
1357 1931
1932#endif
1933
1358/*****************************************************************************/ 1934/*****************************************************************************/
1359 1935
1936#if EV_CHILD_ENABLE
1360static WL childs [EV_PID_HASHSIZE]; 1937static WL childs [EV_PID_HASHSIZE];
1361
1362#ifndef _WIN32
1363 1938
1364static ev_signal childev; 1939static ev_signal childev;
1365 1940
1366#ifndef WIFCONTINUED 1941#ifndef WIFCONTINUED
1367# define WIFCONTINUED(status) 0 1942# define WIFCONTINUED(status) 0
… …
1372child_reap (EV_P_ int chain, int pid, int status) 1947child_reap (EV_P_ int chain, int pid, int status)
1373{ 1948{
1374 ev_child *w; 1949 ev_child *w;
1375 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1950 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1376 1951
1377 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1952 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1378 { 1953 {
1379 if ((w->pid == pid || !w->pid) 1954 if ((w->pid == pid || !w->pid)
1380 && (!traced || (w->flags & 1))) 1955 && (!traced || (w->flags & 1)))
1381 { 1956 {
1382 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1957 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1407 /* make sure we are called again until all children have been reaped */ 1982 /* make sure we are called again until all children have been reaped */
1408 /* we need to do it this way so that the callback gets called before we continue */ 1983 /* we need to do it this way so that the callback gets called before we continue */
1409 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1984 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1410 1985
1411 child_reap (EV_A_ pid, pid, status); 1986 child_reap (EV_A_ pid, pid, status);
1412 if (EV_PID_HASHSIZE > 1) 1987 if ((EV_PID_HASHSIZE) > 1)
1413 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1988 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1414} 1989}
1415 1990
1416#endif 1991#endif
1417 1992
1418/*****************************************************************************/ 1993/*****************************************************************************/
1419 1994
1995#if EV_USE_IOCP
1996# include "ev_iocp.c"
1997#endif
1420#if EV_USE_PORT 1998#if EV_USE_PORT
1421# include "ev_port.c" 1999# include "ev_port.c"
1422#endif 2000#endif
1423#if EV_USE_KQUEUE 2001#if EV_USE_KQUEUE
1424# include "ev_kqueue.c" 2002# include "ev_kqueue.c"
… …
1431#endif 2009#endif
1432#if EV_USE_SELECT 2010#if EV_USE_SELECT
1433# include "ev_select.c" 2011# include "ev_select.c"
1434#endif 2012#endif
1435 2013
1436int 2014int ecb_cold
1437ev_version_major (void) 2015ev_version_major (void)
1438{ 2016{
1439 return EV_VERSION_MAJOR; 2017 return EV_VERSION_MAJOR;
1440} 2018}
1441 2019
1442int 2020int ecb_cold
1443ev_version_minor (void) 2021ev_version_minor (void)
1444{ 2022{
1445 return EV_VERSION_MINOR; 2023 return EV_VERSION_MINOR;
1446} 2024}
1447 2025
1448/* return true if we are running with elevated privileges and should ignore env variables */ 2026/* return true if we are running with elevated privileges and should ignore env variables */
1449int inline_size 2027int inline_size ecb_cold
1450enable_secure (void) 2028enable_secure (void)
1451{ 2029{
1452#ifdef _WIN32 2030#ifdef _WIN32
1453 return 0; 2031 return 0;
1454#else 2032#else
1455 return getuid () != geteuid () 2033 return getuid () != geteuid ()
1456 || getgid () != getegid (); 2034 || getgid () != getegid ();
1457#endif 2035#endif
1458} 2036}
1459 2037
1460unsigned int 2038unsigned int ecb_cold
1461ev_supported_backends (void) 2039ev_supported_backends (void)
1462{ 2040{
1463 unsigned int flags = 0; 2041 unsigned int flags = 0;
1464 2042
1465 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2043 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1469 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2047 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1470 2048
1471 return flags; 2049 return flags;
1472} 2050}
1473 2051
1474unsigned int 2052unsigned int ecb_cold
1475ev_recommended_backends (void) 2053ev_recommended_backends (void)
1476{ 2054{
1477 unsigned int flags = ev_supported_backends (); 2055 unsigned int flags = ev_supported_backends ();
1478 2056
1479#ifndef __NetBSD__ 2057#ifndef __NetBSD__
… …
1484#ifdef __APPLE__ 2062#ifdef __APPLE__
1485 /* only select works correctly on that "unix-certified" platform */ 2063 /* only select works correctly on that "unix-certified" platform */
1486 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2064 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1487 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2065 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1488#endif 2066#endif
2067#ifdef __FreeBSD__
2068 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2069#endif
1489 2070
1490 return flags; 2071 return flags;
1491} 2072}
1492 2073
1493unsigned int 2074unsigned int ecb_cold
1494ev_embeddable_backends (void) 2075ev_embeddable_backends (void)
1495{ 2076{
1496 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2077 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1497 2078
1498 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2079 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1499 /* please fix it and tell me how to detect the fix */ 2080 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1500 flags &= ~EVBACKEND_EPOLL; 2081 flags &= ~EVBACKEND_EPOLL;
1501 2082
1502 return flags; 2083 return flags;
1503} 2084}
1504 2085
1505unsigned int 2086unsigned int
1506ev_backend (EV_P) 2087ev_backend (EV_P)
1507{ 2088{
1508 return backend; 2089 return backend;
1509} 2090}
1510 2091
1511#if EV_MINIMAL < 2 2092#if EV_FEATURE_API
1512unsigned int 2093unsigned int
1513ev_loop_count (EV_P) 2094ev_iteration (EV_P)
1514{ 2095{
1515 return loop_count; 2096 return loop_count;
1516} 2097}
1517 2098
1518unsigned int 2099unsigned int
1519ev_loop_depth (EV_P) 2100ev_depth (EV_P)
1520{ 2101{
1521 return loop_depth; 2102 return loop_depth;
1522} 2103}
1523 2104
1524void 2105void
… …
1543ev_userdata (EV_P) 2124ev_userdata (EV_P)
1544{ 2125{
1545 return userdata; 2126 return userdata;
1546} 2127}
1547 2128
2129void
1548void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2130ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1549{ 2131{
1550 invoke_cb = invoke_pending_cb; 2132 invoke_cb = invoke_pending_cb;
1551} 2133}
1552 2134
2135void
1553void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2136ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1554{ 2137{
1555 release_cb = release; 2138 release_cb = release;
1556 acquire_cb = acquire; 2139 acquire_cb = acquire;
1557} 2140}
1558#endif 2141#endif
1559 2142
1560/* initialise a loop structure, must be zero-initialised */ 2143/* initialise a loop structure, must be zero-initialised */
1561static void noinline 2144static void noinline ecb_cold
1562loop_init (EV_P_ unsigned int flags) 2145loop_init (EV_P_ unsigned int flags)
1563{ 2146{
1564 if (!backend) 2147 if (!backend)
1565 { 2148 {
2149 origflags = flags;
2150
1566#if EV_USE_REALTIME 2151#if EV_USE_REALTIME
1567 if (!have_realtime) 2152 if (!have_realtime)
1568 { 2153 {
1569 struct timespec ts; 2154 struct timespec ts;
1570 2155
… …
1592 if (!(flags & EVFLAG_NOENV) 2177 if (!(flags & EVFLAG_NOENV)
1593 && !enable_secure () 2178 && !enable_secure ()
1594 && getenv ("LIBEV_FLAGS")) 2179 && getenv ("LIBEV_FLAGS"))
1595 flags = atoi (getenv ("LIBEV_FLAGS")); 2180 flags = atoi (getenv ("LIBEV_FLAGS"));
1596 2181
1597 ev_rt_now = ev_time (); 2182 ev_rt_now = ev_time ();
1598 mn_now = get_clock (); 2183 mn_now = get_clock ();
1599 now_floor = mn_now; 2184 now_floor = mn_now;
1600 rtmn_diff = ev_rt_now - mn_now; 2185 rtmn_diff = ev_rt_now - mn_now;
1601#if EV_MINIMAL < 2 2186#if EV_FEATURE_API
1602 invoke_cb = ev_invoke_pending; 2187 invoke_cb = ev_invoke_pending;
1603#endif 2188#endif
1604 2189
1605 io_blocktime = 0.; 2190 io_blocktime = 0.;
1606 timeout_blocktime = 0.; 2191 timeout_blocktime = 0.;
1607 backend = 0; 2192 backend = 0;
1608 backend_fd = -1; 2193 backend_fd = -1;
1609 sig_pending = 0; 2194 sig_pending = 0;
1610#if EV_ASYNC_ENABLE 2195#if EV_ASYNC_ENABLE
1611 async_pending = 0; 2196 async_pending = 0;
1612#endif 2197#endif
2198 pipe_write_skipped = 0;
2199 pipe_write_wanted = 0;
1613#if EV_USE_INOTIFY 2200#if EV_USE_INOTIFY
1614 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2201 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1615#endif 2202#endif
1616#if EV_USE_SIGNALFD 2203#if EV_USE_SIGNALFD
1617 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2204 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1618#endif 2205#endif
1619 2206
1620 if (!(flags & 0x0000ffffU)) 2207 if (!(flags & EVBACKEND_MASK))
1621 flags |= ev_recommended_backends (); 2208 flags |= ev_recommended_backends ();
1622 2209
2210#if EV_USE_IOCP
2211 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2212#endif
1623#if EV_USE_PORT 2213#if EV_USE_PORT
1624 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2214 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1625#endif 2215#endif
1626#if EV_USE_KQUEUE 2216#if EV_USE_KQUEUE
1627 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2217 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1636 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2226 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1637#endif 2227#endif
1638 2228
1639 ev_prepare_init (&pending_w, pendingcb); 2229 ev_prepare_init (&pending_w, pendingcb);
1640 2230
2231#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1641 ev_init (&pipe_w, pipecb); 2232 ev_init (&pipe_w, pipecb);
1642 ev_set_priority (&pipe_w, EV_MAXPRI); 2233 ev_set_priority (&pipe_w, EV_MAXPRI);
2234#endif
1643 } 2235 }
1644} 2236}
1645 2237
1646/* free up a loop structure */ 2238/* free up a loop structure */
1647static void noinline 2239void ecb_cold
1648loop_destroy (EV_P) 2240ev_loop_destroy (EV_P)
1649{ 2241{
1650 int i; 2242 int i;
2243
2244#if EV_MULTIPLICITY
2245 /* mimic free (0) */
2246 if (!EV_A)
2247 return;
2248#endif
2249
2250#if EV_CLEANUP_ENABLE
2251 /* queue cleanup watchers (and execute them) */
2252 if (expect_false (cleanupcnt))
2253 {
2254 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2255 EV_INVOKE_PENDING;
2256 }
2257#endif
2258
2259#if EV_CHILD_ENABLE
2260 if (ev_is_active (&childev))
2261 {
2262 ev_ref (EV_A); /* child watcher */
2263 ev_signal_stop (EV_A_ &childev);
2264 }
2265#endif
1651 2266
1652 if (ev_is_active (&pipe_w)) 2267 if (ev_is_active (&pipe_w))
1653 { 2268 {
1654 /*ev_ref (EV_A);*/ 2269 /*ev_ref (EV_A);*/
1655 /*ev_io_stop (EV_A_ &pipe_w);*/ 2270 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1677#endif 2292#endif
1678 2293
1679 if (backend_fd >= 0) 2294 if (backend_fd >= 0)
1680 close (backend_fd); 2295 close (backend_fd);
1681 2296
2297#if EV_USE_IOCP
2298 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2299#endif
1682#if EV_USE_PORT 2300#if EV_USE_PORT
1683 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2301 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1684#endif 2302#endif
1685#if EV_USE_KQUEUE 2303#if EV_USE_KQUEUE
1686 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2304 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1713 array_free (periodic, EMPTY); 2331 array_free (periodic, EMPTY);
1714#endif 2332#endif
1715#if EV_FORK_ENABLE 2333#if EV_FORK_ENABLE
1716 array_free (fork, EMPTY); 2334 array_free (fork, EMPTY);
1717#endif 2335#endif
2336#if EV_CLEANUP_ENABLE
2337 array_free (cleanup, EMPTY);
2338#endif
1718 array_free (prepare, EMPTY); 2339 array_free (prepare, EMPTY);
1719 array_free (check, EMPTY); 2340 array_free (check, EMPTY);
1720#if EV_ASYNC_ENABLE 2341#if EV_ASYNC_ENABLE
1721 array_free (async, EMPTY); 2342 array_free (async, EMPTY);
1722#endif 2343#endif
1723 2344
1724 backend = 0; 2345 backend = 0;
2346
2347#if EV_MULTIPLICITY
2348 if (ev_is_default_loop (EV_A))
2349#endif
2350 ev_default_loop_ptr = 0;
2351#if EV_MULTIPLICITY
2352 else
2353 ev_free (EV_A);
2354#endif
1725} 2355}
1726 2356
1727#if EV_USE_INOTIFY 2357#if EV_USE_INOTIFY
1728inline_size void infy_fork (EV_P); 2358inline_size void infy_fork (EV_P);
1729#endif 2359#endif
… …
1744 infy_fork (EV_A); 2374 infy_fork (EV_A);
1745#endif 2375#endif
1746 2376
1747 if (ev_is_active (&pipe_w)) 2377 if (ev_is_active (&pipe_w))
1748 { 2378 {
1749 /* this "locks" the handlers against writing to the pipe */ 2379 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1750 /* while we modify the fd vars */
1751 sig_pending = 1;
1752#if EV_ASYNC_ENABLE
1753 async_pending = 1;
1754#endif
1755 2380
1756 ev_ref (EV_A); 2381 ev_ref (EV_A);
1757 ev_io_stop (EV_A_ &pipe_w); 2382 ev_io_stop (EV_A_ &pipe_w);
1758 2383
1759#if EV_USE_EVENTFD 2384#if EV_USE_EVENTFD
… …
1765 { 2390 {
1766 EV_WIN32_CLOSE_FD (evpipe [0]); 2391 EV_WIN32_CLOSE_FD (evpipe [0]);
1767 EV_WIN32_CLOSE_FD (evpipe [1]); 2392 EV_WIN32_CLOSE_FD (evpipe [1]);
1768 } 2393 }
1769 2394
2395#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1770 evpipe_init (EV_A); 2396 evpipe_init (EV_A);
1771 /* now iterate over everything, in case we missed something */ 2397 /* now iterate over everything, in case we missed something */
1772 pipecb (EV_A_ &pipe_w, EV_READ); 2398 pipecb (EV_A_ &pipe_w, EV_READ);
2399#endif
1773 } 2400 }
1774 2401
1775 postfork = 0; 2402 postfork = 0;
1776} 2403}
1777 2404
1778#if EV_MULTIPLICITY 2405#if EV_MULTIPLICITY
1779 2406
1780struct ev_loop * 2407struct ev_loop * ecb_cold
1781ev_loop_new (unsigned int flags) 2408ev_loop_new (unsigned int flags)
1782{ 2409{
1783 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2410 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1784 2411
1785 memset (EV_A, 0, sizeof (struct ev_loop)); 2412 memset (EV_A, 0, sizeof (struct ev_loop));
1786 loop_init (EV_A_ flags); 2413 loop_init (EV_A_ flags);
1787 2414
1788 if (ev_backend (EV_A)) 2415 if (ev_backend (EV_A))
1789 return EV_A; 2416 return EV_A;
1790 2417
2418 ev_free (EV_A);
1791 return 0; 2419 return 0;
1792} 2420}
1793 2421
1794void
1795ev_loop_destroy (EV_P)
1796{
1797 loop_destroy (EV_A);
1798 ev_free (loop);
1799}
1800
1801void
1802ev_loop_fork (EV_P)
1803{
1804 postfork = 1; /* must be in line with ev_default_fork */
1805}
1806#endif /* multiplicity */ 2422#endif /* multiplicity */
1807 2423
1808#if EV_VERIFY 2424#if EV_VERIFY
1809static void noinline 2425static void noinline ecb_cold
1810verify_watcher (EV_P_ W w) 2426verify_watcher (EV_P_ W w)
1811{ 2427{
1812 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2428 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1813 2429
1814 if (w->pending) 2430 if (w->pending)
1815 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2431 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1816} 2432}
1817 2433
1818static void noinline 2434static void noinline ecb_cold
1819verify_heap (EV_P_ ANHE *heap, int N) 2435verify_heap (EV_P_ ANHE *heap, int N)
1820{ 2436{
1821 int i; 2437 int i;
1822 2438
1823 for (i = HEAP0; i < N + HEAP0; ++i) 2439 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1828 2444
1829 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2445 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1830 } 2446 }
1831} 2447}
1832 2448
1833static void noinline 2449static void noinline ecb_cold
1834array_verify (EV_P_ W *ws, int cnt) 2450array_verify (EV_P_ W *ws, int cnt)
1835{ 2451{
1836 while (cnt--) 2452 while (cnt--)
1837 { 2453 {
1838 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2454 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1839 verify_watcher (EV_A_ ws [cnt]); 2455 verify_watcher (EV_A_ ws [cnt]);
1840 } 2456 }
1841} 2457}
1842#endif 2458#endif
1843 2459
1844#if EV_MINIMAL < 2 2460#if EV_FEATURE_API
1845void 2461void ecb_cold
1846ev_loop_verify (EV_P) 2462ev_verify (EV_P)
1847{ 2463{
1848#if EV_VERIFY 2464#if EV_VERIFY
1849 int i; 2465 int i;
1850 WL w; 2466 WL w;
1851 2467
… …
1885#if EV_FORK_ENABLE 2501#if EV_FORK_ENABLE
1886 assert (forkmax >= forkcnt); 2502 assert (forkmax >= forkcnt);
1887 array_verify (EV_A_ (W *)forks, forkcnt); 2503 array_verify (EV_A_ (W *)forks, forkcnt);
1888#endif 2504#endif
1889 2505
2506#if EV_CLEANUP_ENABLE
2507 assert (cleanupmax >= cleanupcnt);
2508 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2509#endif
2510
1890#if EV_ASYNC_ENABLE 2511#if EV_ASYNC_ENABLE
1891 assert (asyncmax >= asynccnt); 2512 assert (asyncmax >= asynccnt);
1892 array_verify (EV_A_ (W *)asyncs, asynccnt); 2513 array_verify (EV_A_ (W *)asyncs, asynccnt);
1893#endif 2514#endif
1894 2515
2516#if EV_PREPARE_ENABLE
1895 assert (preparemax >= preparecnt); 2517 assert (preparemax >= preparecnt);
1896 array_verify (EV_A_ (W *)prepares, preparecnt); 2518 array_verify (EV_A_ (W *)prepares, preparecnt);
2519#endif
1897 2520
2521#if EV_CHECK_ENABLE
1898 assert (checkmax >= checkcnt); 2522 assert (checkmax >= checkcnt);
1899 array_verify (EV_A_ (W *)checks, checkcnt); 2523 array_verify (EV_A_ (W *)checks, checkcnt);
2524#endif
1900 2525
1901# if 0 2526# if 0
2527#if EV_CHILD_ENABLE
1902 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2528 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1903 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) 2529 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2530#endif
1904# endif 2531# endif
1905#endif 2532#endif
1906} 2533}
1907#endif 2534#endif
1908 2535
1909#if EV_MULTIPLICITY 2536#if EV_MULTIPLICITY
1910struct ev_loop * 2537struct ev_loop * ecb_cold
1911ev_default_loop_init (unsigned int flags)
1912#else 2538#else
1913int 2539int
2540#endif
1914ev_default_loop (unsigned int flags) 2541ev_default_loop (unsigned int flags)
1915#endif
1916{ 2542{
1917 if (!ev_default_loop_ptr) 2543 if (!ev_default_loop_ptr)
1918 { 2544 {
1919#if EV_MULTIPLICITY 2545#if EV_MULTIPLICITY
1920 EV_P = ev_default_loop_ptr = &default_loop_struct; 2546 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1924 2550
1925 loop_init (EV_A_ flags); 2551 loop_init (EV_A_ flags);
1926 2552
1927 if (ev_backend (EV_A)) 2553 if (ev_backend (EV_A))
1928 { 2554 {
1929#ifndef _WIN32 2555#if EV_CHILD_ENABLE
1930 ev_signal_init (&childev, childcb, SIGCHLD); 2556 ev_signal_init (&childev, childcb, SIGCHLD);
1931 ev_set_priority (&childev, EV_MAXPRI); 2557 ev_set_priority (&childev, EV_MAXPRI);
1932 ev_signal_start (EV_A_ &childev); 2558 ev_signal_start (EV_A_ &childev);
1933 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2559 ev_unref (EV_A); /* child watcher should not keep loop alive */
1934#endif 2560#endif
… …
1939 2565
1940 return ev_default_loop_ptr; 2566 return ev_default_loop_ptr;
1941} 2567}
1942 2568
1943void 2569void
1944ev_default_destroy (void) 2570ev_loop_fork (EV_P)
1945{ 2571{
1946#if EV_MULTIPLICITY
1947 EV_P = ev_default_loop_ptr;
1948#endif
1949
1950 ev_default_loop_ptr = 0;
1951
1952#ifndef _WIN32
1953 ev_ref (EV_A); /* child watcher */
1954 ev_signal_stop (EV_A_ &childev);
1955#endif
1956
1957 loop_destroy (EV_A);
1958}
1959
1960void
1961ev_default_fork (void)
1962{
1963#if EV_MULTIPLICITY
1964 EV_P = ev_default_loop_ptr;
1965#endif
1966
1967 postfork = 1; /* must be in line with ev_loop_fork */ 2572 postfork = 1; /* must be in line with ev_default_fork */
1968} 2573}
1969 2574
1970/*****************************************************************************/ 2575/*****************************************************************************/
1971 2576
1972void 2577void
… …
1994 2599
1995 for (pri = NUMPRI; pri--; ) 2600 for (pri = NUMPRI; pri--; )
1996 while (pendingcnt [pri]) 2601 while (pendingcnt [pri])
1997 { 2602 {
1998 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2603 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1999
2000 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2001 /* ^ this is no longer true, as pending_w could be here */
2002 2604
2003 p->w->pending = 0; 2605 p->w->pending = 0;
2004 EV_CB_INVOKE (p->w, p->events); 2606 EV_CB_INVOKE (p->w, p->events);
2005 EV_FREQUENT_CHECK; 2607 EV_FREQUENT_CHECK;
2006 } 2608 }
… …
2063 EV_FREQUENT_CHECK; 2665 EV_FREQUENT_CHECK;
2064 feed_reverse (EV_A_ (W)w); 2666 feed_reverse (EV_A_ (W)w);
2065 } 2667 }
2066 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2668 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2067 2669
2068 feed_reverse_done (EV_A_ EV_TIMEOUT); 2670 feed_reverse_done (EV_A_ EV_TIMER);
2069 } 2671 }
2070} 2672}
2071 2673
2072#if EV_PERIODIC_ENABLE 2674#if EV_PERIODIC_ENABLE
2675
2676static void noinline
2677periodic_recalc (EV_P_ ev_periodic *w)
2678{
2679 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2680 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2681
2682 /* the above almost always errs on the low side */
2683 while (at <= ev_rt_now)
2684 {
2685 ev_tstamp nat = at + w->interval;
2686
2687 /* when resolution fails us, we use ev_rt_now */
2688 if (expect_false (nat == at))
2689 {
2690 at = ev_rt_now;
2691 break;
2692 }
2693
2694 at = nat;
2695 }
2696
2697 ev_at (w) = at;
2698}
2699
2073/* make periodics pending */ 2700/* make periodics pending */
2074inline_size void 2701inline_size void
2075periodics_reify (EV_P) 2702periodics_reify (EV_P)
2076{ 2703{
2077 EV_FREQUENT_CHECK; 2704 EV_FREQUENT_CHECK;
… …
2096 ANHE_at_cache (periodics [HEAP0]); 2723 ANHE_at_cache (periodics [HEAP0]);
2097 downheap (periodics, periodiccnt, HEAP0); 2724 downheap (periodics, periodiccnt, HEAP0);
2098 } 2725 }
2099 else if (w->interval) 2726 else if (w->interval)
2100 { 2727 {
2101 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2728 periodic_recalc (EV_A_ w);
2102 /* if next trigger time is not sufficiently in the future, put it there */
2103 /* this might happen because of floating point inexactness */
2104 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2105 {
2106 ev_at (w) += w->interval;
2107
2108 /* if interval is unreasonably low we might still have a time in the past */
2109 /* so correct this. this will make the periodic very inexact, but the user */
2110 /* has effectively asked to get triggered more often than possible */
2111 if (ev_at (w) < ev_rt_now)
2112 ev_at (w) = ev_rt_now;
2113 }
2114
2115 ANHE_at_cache (periodics [HEAP0]); 2729 ANHE_at_cache (periodics [HEAP0]);
2116 downheap (periodics, periodiccnt, HEAP0); 2730 downheap (periodics, periodiccnt, HEAP0);
2117 } 2731 }
2118 else 2732 else
2119 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2733 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2126 feed_reverse_done (EV_A_ EV_PERIODIC); 2740 feed_reverse_done (EV_A_ EV_PERIODIC);
2127 } 2741 }
2128} 2742}
2129 2743
2130/* simply recalculate all periodics */ 2744/* simply recalculate all periodics */
2131/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2745/* TODO: maybe ensure that at least one event happens when jumping forward? */
2132static void noinline 2746static void noinline ecb_cold
2133periodics_reschedule (EV_P) 2747periodics_reschedule (EV_P)
2134{ 2748{
2135 int i; 2749 int i;
2136 2750
2137 /* adjust periodics after time jump */ 2751 /* adjust periodics after time jump */
… …
2140 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2754 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2141 2755
2142 if (w->reschedule_cb) 2756 if (w->reschedule_cb)
2143 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2757 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2144 else if (w->interval) 2758 else if (w->interval)
2145 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2759 periodic_recalc (EV_A_ w);
2146 2760
2147 ANHE_at_cache (periodics [i]); 2761 ANHE_at_cache (periodics [i]);
2148 } 2762 }
2149 2763
2150 reheap (periodics, periodiccnt); 2764 reheap (periodics, periodiccnt);
2151} 2765}
2152#endif 2766#endif
2153 2767
2154/* adjust all timers by a given offset */ 2768/* adjust all timers by a given offset */
2155static void noinline 2769static void noinline ecb_cold
2156timers_reschedule (EV_P_ ev_tstamp adjust) 2770timers_reschedule (EV_P_ ev_tstamp adjust)
2157{ 2771{
2158 int i; 2772 int i;
2159 2773
2160 for (i = 0; i < timercnt; ++i) 2774 for (i = 0; i < timercnt; ++i)
… …
2197 * doesn't hurt either as we only do this on time-jumps or 2811 * doesn't hurt either as we only do this on time-jumps or
2198 * in the unlikely event of having been preempted here. 2812 * in the unlikely event of having been preempted here.
2199 */ 2813 */
2200 for (i = 4; --i; ) 2814 for (i = 4; --i; )
2201 { 2815 {
2816 ev_tstamp diff;
2202 rtmn_diff = ev_rt_now - mn_now; 2817 rtmn_diff = ev_rt_now - mn_now;
2203 2818
2819 diff = odiff - rtmn_diff;
2820
2204 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2821 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2205 return; /* all is well */ 2822 return; /* all is well */
2206 2823
2207 ev_rt_now = ev_time (); 2824 ev_rt_now = ev_time ();
2208 mn_now = get_clock (); 2825 mn_now = get_clock ();
2209 now_floor = mn_now; 2826 now_floor = mn_now;
… …
2232 mn_now = ev_rt_now; 2849 mn_now = ev_rt_now;
2233 } 2850 }
2234} 2851}
2235 2852
2236void 2853void
2237ev_loop (EV_P_ int flags) 2854ev_run (EV_P_ int flags)
2238{ 2855{
2239#if EV_MINIMAL < 2 2856#if EV_FEATURE_API
2240 ++loop_depth; 2857 ++loop_depth;
2241#endif 2858#endif
2242 2859
2243 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2860 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2244 2861
2245 loop_done = EVUNLOOP_CANCEL; 2862 loop_done = EVBREAK_CANCEL;
2246 2863
2247 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2864 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2248 2865
2249 do 2866 do
2250 { 2867 {
2251#if EV_VERIFY >= 2 2868#if EV_VERIFY >= 2
2252 ev_loop_verify (EV_A); 2869 ev_verify (EV_A);
2253#endif 2870#endif
2254 2871
2255#ifndef _WIN32 2872#ifndef _WIN32
2256 if (expect_false (curpid)) /* penalise the forking check even more */ 2873 if (expect_false (curpid)) /* penalise the forking check even more */
2257 if (expect_false (getpid () != curpid)) 2874 if (expect_false (getpid () != curpid))
… …
2269 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2886 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2270 EV_INVOKE_PENDING; 2887 EV_INVOKE_PENDING;
2271 } 2888 }
2272#endif 2889#endif
2273 2890
2891#if EV_PREPARE_ENABLE
2274 /* queue prepare watchers (and execute them) */ 2892 /* queue prepare watchers (and execute them) */
2275 if (expect_false (preparecnt)) 2893 if (expect_false (preparecnt))
2276 { 2894 {
2277 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2895 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2278 EV_INVOKE_PENDING; 2896 EV_INVOKE_PENDING;
2279 } 2897 }
2898#endif
2280 2899
2281 if (expect_false (loop_done)) 2900 if (expect_false (loop_done))
2282 break; 2901 break;
2283 2902
2284 /* we might have forked, so reify kernel state if necessary */ 2903 /* we might have forked, so reify kernel state if necessary */
… …
2291 /* calculate blocking time */ 2910 /* calculate blocking time */
2292 { 2911 {
2293 ev_tstamp waittime = 0.; 2912 ev_tstamp waittime = 0.;
2294 ev_tstamp sleeptime = 0.; 2913 ev_tstamp sleeptime = 0.;
2295 2914
2915 /* remember old timestamp for io_blocktime calculation */
2916 ev_tstamp prev_mn_now = mn_now;
2917
2918 /* update time to cancel out callback processing overhead */
2919 time_update (EV_A_ 1e100);
2920
2921 /* from now on, we want a pipe-wake-up */
2922 pipe_write_wanted = 1;
2923
2924 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2925
2296 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2926 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2297 { 2927 {
2298 /* remember old timestamp for io_blocktime calculation */
2299 ev_tstamp prev_mn_now = mn_now;
2300
2301 /* update time to cancel out callback processing overhead */
2302 time_update (EV_A_ 1e100);
2303
2304 waittime = MAX_BLOCKTIME; 2928 waittime = MAX_BLOCKTIME;
2305 2929
2306 if (timercnt) 2930 if (timercnt)
2307 { 2931 {
2308 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2932 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2309 if (waittime > to) waittime = to; 2933 if (waittime > to) waittime = to;
2310 } 2934 }
2311 2935
2312#if EV_PERIODIC_ENABLE 2936#if EV_PERIODIC_ENABLE
2313 if (periodiccnt) 2937 if (periodiccnt)
2314 { 2938 {
2315 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2939 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2316 if (waittime > to) waittime = to; 2940 if (waittime > to) waittime = to;
2317 } 2941 }
2318#endif 2942#endif
2319 2943
2320 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2944 /* don't let timeouts decrease the waittime below timeout_blocktime */
2321 if (expect_false (waittime < timeout_blocktime)) 2945 if (expect_false (waittime < timeout_blocktime))
2322 waittime = timeout_blocktime; 2946 waittime = timeout_blocktime;
2947
2948 /* at this point, we NEED to wait, so we have to ensure */
2949 /* to pass a minimum nonzero value to the backend */
2950 if (expect_false (waittime < backend_mintime))
2951 waittime = backend_mintime;
2323 2952
2324 /* extra check because io_blocktime is commonly 0 */ 2953 /* extra check because io_blocktime is commonly 0 */
2325 if (expect_false (io_blocktime)) 2954 if (expect_false (io_blocktime))
2326 { 2955 {
2327 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2956 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2328 2957
2329 if (sleeptime > waittime - backend_fudge) 2958 if (sleeptime > waittime - backend_mintime)
2330 sleeptime = waittime - backend_fudge; 2959 sleeptime = waittime - backend_mintime;
2331 2960
2332 if (expect_true (sleeptime > 0.)) 2961 if (expect_true (sleeptime > 0.))
2333 { 2962 {
2334 ev_sleep (sleeptime); 2963 ev_sleep (sleeptime);
2335 waittime -= sleeptime; 2964 waittime -= sleeptime;
2336 } 2965 }
2337 } 2966 }
2338 } 2967 }
2339 2968
2340#if EV_MINIMAL < 2 2969#if EV_FEATURE_API
2341 ++loop_count; 2970 ++loop_count;
2342#endif 2971#endif
2343 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2972 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2344 backend_poll (EV_A_ waittime); 2973 backend_poll (EV_A_ waittime);
2345 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2974 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2975
2976 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2977
2978 if (pipe_write_skipped)
2979 {
2980 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2981 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2982 }
2983
2346 2984
2347 /* update ev_rt_now, do magic */ 2985 /* update ev_rt_now, do magic */
2348 time_update (EV_A_ waittime + sleeptime); 2986 time_update (EV_A_ waittime + sleeptime);
2349 } 2987 }
2350 2988
… …
2357#if EV_IDLE_ENABLE 2995#if EV_IDLE_ENABLE
2358 /* queue idle watchers unless other events are pending */ 2996 /* queue idle watchers unless other events are pending */
2359 idle_reify (EV_A); 2997 idle_reify (EV_A);
2360#endif 2998#endif
2361 2999
3000#if EV_CHECK_ENABLE
2362 /* queue check watchers, to be executed first */ 3001 /* queue check watchers, to be executed first */
2363 if (expect_false (checkcnt)) 3002 if (expect_false (checkcnt))
2364 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3003 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3004#endif
2365 3005
2366 EV_INVOKE_PENDING; 3006 EV_INVOKE_PENDING;
2367 } 3007 }
2368 while (expect_true ( 3008 while (expect_true (
2369 activecnt 3009 activecnt
2370 && !loop_done 3010 && !loop_done
2371 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3011 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2372 )); 3012 ));
2373 3013
2374 if (loop_done == EVUNLOOP_ONE) 3014 if (loop_done == EVBREAK_ONE)
2375 loop_done = EVUNLOOP_CANCEL; 3015 loop_done = EVBREAK_CANCEL;
2376 3016
2377#if EV_MINIMAL < 2 3017#if EV_FEATURE_API
2378 --loop_depth; 3018 --loop_depth;
2379#endif 3019#endif
2380} 3020}
2381 3021
2382void 3022void
2383ev_unloop (EV_P_ int how) 3023ev_break (EV_P_ int how)
2384{ 3024{
2385 loop_done = how; 3025 loop_done = how;
2386} 3026}
2387 3027
2388void 3028void
… …
2536 EV_FREQUENT_CHECK; 3176 EV_FREQUENT_CHECK;
2537 3177
2538 wlist_del (&anfds[w->fd].head, (WL)w); 3178 wlist_del (&anfds[w->fd].head, (WL)w);
2539 ev_stop (EV_A_ (W)w); 3179 ev_stop (EV_A_ (W)w);
2540 3180
2541 fd_change (EV_A_ w->fd, 1); 3181 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2542 3182
2543 EV_FREQUENT_CHECK; 3183 EV_FREQUENT_CHECK;
2544} 3184}
2545 3185
2546void noinline 3186void noinline
… …
2588 timers [active] = timers [timercnt + HEAP0]; 3228 timers [active] = timers [timercnt + HEAP0];
2589 adjustheap (timers, timercnt, active); 3229 adjustheap (timers, timercnt, active);
2590 } 3230 }
2591 } 3231 }
2592 3232
2593 EV_FREQUENT_CHECK;
2594
2595 ev_at (w) -= mn_now; 3233 ev_at (w) -= mn_now;
2596 3234
2597 ev_stop (EV_A_ (W)w); 3235 ev_stop (EV_A_ (W)w);
3236
3237 EV_FREQUENT_CHECK;
2598} 3238}
2599 3239
2600void noinline 3240void noinline
2601ev_timer_again (EV_P_ ev_timer *w) 3241ev_timer_again (EV_P_ ev_timer *w)
2602{ 3242{
… …
2638 if (w->reschedule_cb) 3278 if (w->reschedule_cb)
2639 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3279 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2640 else if (w->interval) 3280 else if (w->interval)
2641 { 3281 {
2642 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3282 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2643 /* this formula differs from the one in periodic_reify because we do not always round up */ 3283 periodic_recalc (EV_A_ w);
2644 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2645 } 3284 }
2646 else 3285 else
2647 ev_at (w) = w->offset; 3286 ev_at (w) = w->offset;
2648 3287
2649 EV_FREQUENT_CHECK; 3288 EV_FREQUENT_CHECK;
… …
2681 periodics [active] = periodics [periodiccnt + HEAP0]; 3320 periodics [active] = periodics [periodiccnt + HEAP0];
2682 adjustheap (periodics, periodiccnt, active); 3321 adjustheap (periodics, periodiccnt, active);
2683 } 3322 }
2684 } 3323 }
2685 3324
2686 EV_FREQUENT_CHECK;
2687
2688 ev_stop (EV_A_ (W)w); 3325 ev_stop (EV_A_ (W)w);
3326
3327 EV_FREQUENT_CHECK;
2689} 3328}
2690 3329
2691void noinline 3330void noinline
2692ev_periodic_again (EV_P_ ev_periodic *w) 3331ev_periodic_again (EV_P_ ev_periodic *w)
2693{ 3332{
… …
2698#endif 3337#endif
2699 3338
2700#ifndef SA_RESTART 3339#ifndef SA_RESTART
2701# define SA_RESTART 0 3340# define SA_RESTART 0
2702#endif 3341#endif
3342
3343#if EV_SIGNAL_ENABLE
2703 3344
2704void noinline 3345void noinline
2705ev_signal_start (EV_P_ ev_signal *w) 3346ev_signal_start (EV_P_ ev_signal *w)
2706{ 3347{
2707 if (expect_false (ev_is_active (w))) 3348 if (expect_false (ev_is_active (w)))
… …
2768 sa.sa_handler = ev_sighandler; 3409 sa.sa_handler = ev_sighandler;
2769 sigfillset (&sa.sa_mask); 3410 sigfillset (&sa.sa_mask);
2770 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3411 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2771 sigaction (w->signum, &sa, 0); 3412 sigaction (w->signum, &sa, 0);
2772 3413
3414 if (origflags & EVFLAG_NOSIGMASK)
3415 {
2773 sigemptyset (&sa.sa_mask); 3416 sigemptyset (&sa.sa_mask);
2774 sigaddset (&sa.sa_mask, w->signum); 3417 sigaddset (&sa.sa_mask, w->signum);
2775 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3418 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3419 }
2776#endif 3420#endif
2777 } 3421 }
2778 3422
2779 EV_FREQUENT_CHECK; 3423 EV_FREQUENT_CHECK;
2780} 3424}
… …
2814 } 3458 }
2815 3459
2816 EV_FREQUENT_CHECK; 3460 EV_FREQUENT_CHECK;
2817} 3461}
2818 3462
3463#endif
3464
3465#if EV_CHILD_ENABLE
3466
2819void 3467void
2820ev_child_start (EV_P_ ev_child *w) 3468ev_child_start (EV_P_ ev_child *w)
2821{ 3469{
2822#if EV_MULTIPLICITY 3470#if EV_MULTIPLICITY
2823 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3471 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
… …
2826 return; 3474 return;
2827 3475
2828 EV_FREQUENT_CHECK; 3476 EV_FREQUENT_CHECK;
2829 3477
2830 ev_start (EV_A_ (W)w, 1); 3478 ev_start (EV_A_ (W)w, 1);
2831 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3479 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2832 3480
2833 EV_FREQUENT_CHECK; 3481 EV_FREQUENT_CHECK;
2834} 3482}
2835 3483
2836void 3484void
… …
2840 if (expect_false (!ev_is_active (w))) 3488 if (expect_false (!ev_is_active (w)))
2841 return; 3489 return;
2842 3490
2843 EV_FREQUENT_CHECK; 3491 EV_FREQUENT_CHECK;
2844 3492
2845 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3493 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2846 ev_stop (EV_A_ (W)w); 3494 ev_stop (EV_A_ (W)w);
2847 3495
2848 EV_FREQUENT_CHECK; 3496 EV_FREQUENT_CHECK;
2849} 3497}
3498
3499#endif
2850 3500
2851#if EV_STAT_ENABLE 3501#if EV_STAT_ENABLE
2852 3502
2853# ifdef _WIN32 3503# ifdef _WIN32
2854# undef lstat 3504# undef lstat
… …
2915 if (!pend || pend == path) 3565 if (!pend || pend == path)
2916 break; 3566 break;
2917 3567
2918 *pend = 0; 3568 *pend = 0;
2919 w->wd = inotify_add_watch (fs_fd, path, mask); 3569 w->wd = inotify_add_watch (fs_fd, path, mask);
2920 } 3570 }
2921 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3571 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2922 } 3572 }
2923 } 3573 }
2924 3574
2925 if (w->wd >= 0) 3575 if (w->wd >= 0)
2926 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3576 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2927 3577
2928 /* now re-arm timer, if required */ 3578 /* now re-arm timer, if required */
2929 if (ev_is_active (&w->timer)) ev_ref (EV_A); 3579 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2930 ev_timer_again (EV_A_ &w->timer); 3580 ev_timer_again (EV_A_ &w->timer);
2931 if (ev_is_active (&w->timer)) ev_unref (EV_A); 3581 if (ev_is_active (&w->timer)) ev_unref (EV_A);
… …
2939 3589
2940 if (wd < 0) 3590 if (wd < 0)
2941 return; 3591 return;
2942 3592
2943 w->wd = -2; 3593 w->wd = -2;
2944 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3594 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2945 wlist_del (&fs_hash [slot].head, (WL)w); 3595 wlist_del (&fs_hash [slot].head, (WL)w);
2946 3596
2947 /* remove this watcher, if others are watching it, they will rearm */ 3597 /* remove this watcher, if others are watching it, they will rearm */
2948 inotify_rm_watch (fs_fd, wd); 3598 inotify_rm_watch (fs_fd, wd);
2949} 3599}
… …
2951static void noinline 3601static void noinline
2952infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3602infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2953{ 3603{
2954 if (slot < 0) 3604 if (slot < 0)
2955 /* overflow, need to check for all hash slots */ 3605 /* overflow, need to check for all hash slots */
2956 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3606 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2957 infy_wd (EV_A_ slot, wd, ev); 3607 infy_wd (EV_A_ slot, wd, ev);
2958 else 3608 else
2959 { 3609 {
2960 WL w_; 3610 WL w_;
2961 3611
2962 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3612 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2963 { 3613 {
2964 ev_stat *w = (ev_stat *)w_; 3614 ev_stat *w = (ev_stat *)w_;
2965 w_ = w_->next; /* lets us remove this watcher and all before it */ 3615 w_ = w_->next; /* lets us remove this watcher and all before it */
2966 3616
2967 if (w->wd == wd || wd == -1) 3617 if (w->wd == wd || wd == -1)
2968 { 3618 {
2969 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3619 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2970 { 3620 {
2971 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3621 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2972 w->wd = -1; 3622 w->wd = -1;
2973 infy_add (EV_A_ w); /* re-add, no matter what */ 3623 infy_add (EV_A_ w); /* re-add, no matter what */
2974 } 3624 }
2975 3625
2976 stat_timer_cb (EV_A_ &w->timer, 0); 3626 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2992 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3642 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2993 ofs += sizeof (struct inotify_event) + ev->len; 3643 ofs += sizeof (struct inotify_event) + ev->len;
2994 } 3644 }
2995} 3645}
2996 3646
2997inline_size void 3647inline_size void ecb_cold
2998check_2625 (EV_P) 3648ev_check_2625 (EV_P)
2999{ 3649{
3000 /* kernels < 2.6.25 are borked 3650 /* kernels < 2.6.25 are borked
3001 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3651 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3002 */ 3652 */
3003 struct utsname buf; 3653 if (ev_linux_version () < 0x020619)
3004 int major, minor, micro;
3005
3006 if (uname (&buf))
3007 return;
3008
3009 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
3010 return;
3011
3012 if (major < 2
3013 || (major == 2 && minor < 6)
3014 || (major == 2 && minor == 6 && micro < 25))
3015 return; 3654 return;
3016 3655
3017 fs_2625 = 1; 3656 fs_2625 = 1;
3018} 3657}
3019 3658
… …
3034 if (fs_fd != -2) 3673 if (fs_fd != -2)
3035 return; 3674 return;
3036 3675
3037 fs_fd = -1; 3676 fs_fd = -1;
3038 3677
3039 check_2625 (EV_A); 3678 ev_check_2625 (EV_A);
3040 3679
3041 fs_fd = infy_newfd (); 3680 fs_fd = infy_newfd ();
3042 3681
3043 if (fs_fd >= 0) 3682 if (fs_fd >= 0)
3044 { 3683 {
… …
3069 ev_io_set (&fs_w, fs_fd, EV_READ); 3708 ev_io_set (&fs_w, fs_fd, EV_READ);
3070 ev_io_start (EV_A_ &fs_w); 3709 ev_io_start (EV_A_ &fs_w);
3071 ev_unref (EV_A); 3710 ev_unref (EV_A);
3072 } 3711 }
3073 3712
3074 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3713 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3075 { 3714 {
3076 WL w_ = fs_hash [slot].head; 3715 WL w_ = fs_hash [slot].head;
3077 fs_hash [slot].head = 0; 3716 fs_hash [slot].head = 0;
3078 3717
3079 while (w_) 3718 while (w_)
… …
3254 3893
3255 EV_FREQUENT_CHECK; 3894 EV_FREQUENT_CHECK;
3256} 3895}
3257#endif 3896#endif
3258 3897
3898#if EV_PREPARE_ENABLE
3259void 3899void
3260ev_prepare_start (EV_P_ ev_prepare *w) 3900ev_prepare_start (EV_P_ ev_prepare *w)
3261{ 3901{
3262 if (expect_false (ev_is_active (w))) 3902 if (expect_false (ev_is_active (w)))
3263 return; 3903 return;
… …
3289 3929
3290 ev_stop (EV_A_ (W)w); 3930 ev_stop (EV_A_ (W)w);
3291 3931
3292 EV_FREQUENT_CHECK; 3932 EV_FREQUENT_CHECK;
3293} 3933}
3934#endif
3294 3935
3936#if EV_CHECK_ENABLE
3295void 3937void
3296ev_check_start (EV_P_ ev_check *w) 3938ev_check_start (EV_P_ ev_check *w)
3297{ 3939{
3298 if (expect_false (ev_is_active (w))) 3940 if (expect_false (ev_is_active (w)))
3299 return; 3941 return;
… …
3325 3967
3326 ev_stop (EV_A_ (W)w); 3968 ev_stop (EV_A_ (W)w);
3327 3969
3328 EV_FREQUENT_CHECK; 3970 EV_FREQUENT_CHECK;
3329} 3971}
3972#endif
3330 3973
3331#if EV_EMBED_ENABLE 3974#if EV_EMBED_ENABLE
3332void noinline 3975void noinline
3333ev_embed_sweep (EV_P_ ev_embed *w) 3976ev_embed_sweep (EV_P_ ev_embed *w)
3334{ 3977{
3335 ev_loop (w->other, EVLOOP_NONBLOCK); 3978 ev_run (w->other, EVRUN_NOWAIT);
3336} 3979}
3337 3980
3338static void 3981static void
3339embed_io_cb (EV_P_ ev_io *io, int revents) 3982embed_io_cb (EV_P_ ev_io *io, int revents)
3340{ 3983{
3341 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3984 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3342 3985
3343 if (ev_cb (w)) 3986 if (ev_cb (w))
3344 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3987 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3345 else 3988 else
3346 ev_loop (w->other, EVLOOP_NONBLOCK); 3989 ev_run (w->other, EVRUN_NOWAIT);
3347} 3990}
3348 3991
3349static void 3992static void
3350embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3993embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3351{ 3994{
… …
3355 EV_P = w->other; 3998 EV_P = w->other;
3356 3999
3357 while (fdchangecnt) 4000 while (fdchangecnt)
3358 { 4001 {
3359 fd_reify (EV_A); 4002 fd_reify (EV_A);
3360 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4003 ev_run (EV_A_ EVRUN_NOWAIT);
3361 } 4004 }
3362 } 4005 }
3363} 4006}
3364 4007
3365static void 4008static void
… …
3371 4014
3372 { 4015 {
3373 EV_P = w->other; 4016 EV_P = w->other;
3374 4017
3375 ev_loop_fork (EV_A); 4018 ev_loop_fork (EV_A);
3376 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4019 ev_run (EV_A_ EVRUN_NOWAIT);
3377 } 4020 }
3378 4021
3379 ev_embed_start (EV_A_ w); 4022 ev_embed_start (EV_A_ w);
3380} 4023}
3381 4024
… …
3429 4072
3430 ev_io_stop (EV_A_ &w->io); 4073 ev_io_stop (EV_A_ &w->io);
3431 ev_prepare_stop (EV_A_ &w->prepare); 4074 ev_prepare_stop (EV_A_ &w->prepare);
3432 ev_fork_stop (EV_A_ &w->fork); 4075 ev_fork_stop (EV_A_ &w->fork);
3433 4076
4077 ev_stop (EV_A_ (W)w);
4078
3434 EV_FREQUENT_CHECK; 4079 EV_FREQUENT_CHECK;
3435} 4080}
3436#endif 4081#endif
3437 4082
3438#if EV_FORK_ENABLE 4083#if EV_FORK_ENABLE
… …
3471 4116
3472 EV_FREQUENT_CHECK; 4117 EV_FREQUENT_CHECK;
3473} 4118}
3474#endif 4119#endif
3475 4120
4121#if EV_CLEANUP_ENABLE
4122void
4123ev_cleanup_start (EV_P_ ev_cleanup *w)
4124{
4125 if (expect_false (ev_is_active (w)))
4126 return;
4127
4128 EV_FREQUENT_CHECK;
4129
4130 ev_start (EV_A_ (W)w, ++cleanupcnt);
4131 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4132 cleanups [cleanupcnt - 1] = w;
4133
4134 /* cleanup watchers should never keep a refcount on the loop */
4135 ev_unref (EV_A);
4136 EV_FREQUENT_CHECK;
4137}
4138
4139void
4140ev_cleanup_stop (EV_P_ ev_cleanup *w)
4141{
4142 clear_pending (EV_A_ (W)w);
4143 if (expect_false (!ev_is_active (w)))
4144 return;
4145
4146 EV_FREQUENT_CHECK;
4147 ev_ref (EV_A);
4148
4149 {
4150 int active = ev_active (w);
4151
4152 cleanups [active - 1] = cleanups [--cleanupcnt];
4153 ev_active (cleanups [active - 1]) = active;
4154 }
4155
4156 ev_stop (EV_A_ (W)w);
4157
4158 EV_FREQUENT_CHECK;
4159}
4160#endif
4161
3476#if EV_ASYNC_ENABLE 4162#if EV_ASYNC_ENABLE
3477void 4163void
3478ev_async_start (EV_P_ ev_async *w) 4164ev_async_start (EV_P_ ev_async *w)
3479{ 4165{
3480 if (expect_false (ev_is_active (w))) 4166 if (expect_false (ev_is_active (w)))
3481 return; 4167 return;
4168
4169 w->sent = 0;
3482 4170
3483 evpipe_init (EV_A); 4171 evpipe_init (EV_A);
3484 4172
3485 EV_FREQUENT_CHECK; 4173 EV_FREQUENT_CHECK;
3486 4174
… …
3564{ 4252{
3565 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4253 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3566 4254
3567 if (expect_false (!once)) 4255 if (expect_false (!once))
3568 { 4256 {
3569 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4257 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3570 return; 4258 return;
3571 } 4259 }
3572 4260
3573 once->cb = cb; 4261 once->cb = cb;
3574 once->arg = arg; 4262 once->arg = arg;
… …
3589} 4277}
3590 4278
3591/*****************************************************************************/ 4279/*****************************************************************************/
3592 4280
3593#if EV_WALK_ENABLE 4281#if EV_WALK_ENABLE
3594void 4282void ecb_cold
3595ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4283ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3596{ 4284{
3597 int i, j; 4285 int i, j;
3598 ev_watcher_list *wl, *wn; 4286 ev_watcher_list *wl, *wn;
3599 4287
… …
3643 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4331 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3644#endif 4332#endif
3645 4333
3646#if EV_IDLE_ENABLE 4334#if EV_IDLE_ENABLE
3647 if (types & EV_IDLE) 4335 if (types & EV_IDLE)
3648 for (j = NUMPRI; i--; ) 4336 for (j = NUMPRI; j--; )
3649 for (i = idlecnt [j]; i--; ) 4337 for (i = idlecnt [j]; i--; )
3650 cb (EV_A_ EV_IDLE, idles [j][i]); 4338 cb (EV_A_ EV_IDLE, idles [j][i]);
3651#endif 4339#endif
3652 4340
3653#if EV_FORK_ENABLE 4341#if EV_FORK_ENABLE
… …
3661 if (types & EV_ASYNC) 4349 if (types & EV_ASYNC)
3662 for (i = asynccnt; i--; ) 4350 for (i = asynccnt; i--; )
3663 cb (EV_A_ EV_ASYNC, asyncs [i]); 4351 cb (EV_A_ EV_ASYNC, asyncs [i]);
3664#endif 4352#endif
3665 4353
4354#if EV_PREPARE_ENABLE
3666 if (types & EV_PREPARE) 4355 if (types & EV_PREPARE)
3667 for (i = preparecnt; i--; ) 4356 for (i = preparecnt; i--; )
3668#if EV_EMBED_ENABLE 4357# if EV_EMBED_ENABLE
3669 if (ev_cb (prepares [i]) != embed_prepare_cb) 4358 if (ev_cb (prepares [i]) != embed_prepare_cb)
3670#endif 4359# endif
3671 cb (EV_A_ EV_PREPARE, prepares [i]); 4360 cb (EV_A_ EV_PREPARE, prepares [i]);
4361#endif
3672 4362
4363#if EV_CHECK_ENABLE
3673 if (types & EV_CHECK) 4364 if (types & EV_CHECK)
3674 for (i = checkcnt; i--; ) 4365 for (i = checkcnt; i--; )
3675 cb (EV_A_ EV_CHECK, checks [i]); 4366 cb (EV_A_ EV_CHECK, checks [i]);
4367#endif
3676 4368
4369#if EV_SIGNAL_ENABLE
3677 if (types & EV_SIGNAL) 4370 if (types & EV_SIGNAL)
3678 for (i = 0; i < EV_NSIG - 1; ++i) 4371 for (i = 0; i < EV_NSIG - 1; ++i)
3679 for (wl = signals [i].head; wl; ) 4372 for (wl = signals [i].head; wl; )
3680 { 4373 {
3681 wn = wl->next; 4374 wn = wl->next;
3682 cb (EV_A_ EV_SIGNAL, wl); 4375 cb (EV_A_ EV_SIGNAL, wl);
3683 wl = wn; 4376 wl = wn;
3684 } 4377 }
4378#endif
3685 4379
4380#if EV_CHILD_ENABLE
3686 if (types & EV_CHILD) 4381 if (types & EV_CHILD)
3687 for (i = EV_PID_HASHSIZE; i--; ) 4382 for (i = (EV_PID_HASHSIZE); i--; )
3688 for (wl = childs [i]; wl; ) 4383 for (wl = childs [i]; wl; )
3689 { 4384 {
3690 wn = wl->next; 4385 wn = wl->next;
3691 cb (EV_A_ EV_CHILD, wl); 4386 cb (EV_A_ EV_CHILD, wl);
3692 wl = wn; 4387 wl = wn;
3693 } 4388 }
4389#endif
3694/* EV_STAT 0x00001000 /* stat data changed */ 4390/* EV_STAT 0x00001000 /* stat data changed */
3695/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4391/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3696} 4392}
3697#endif 4393#endif
3698 4394
3699#if EV_MULTIPLICITY 4395#if EV_MULTIPLICITY
3700 #include "ev_wrap.h" 4396 #include "ev_wrap.h"
3701#endif 4397#endif
3702 4398
3703#ifdef __cplusplus 4399EV_CPP(})
3704}
3705#endif
3706 4400

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