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Comparing libev/ev.c (file contents):
Revision 1.326 by root, Tue Jan 26 04:19:37 2010 UTC vs.
Revision 1.391 by root, Thu Aug 4 13:57:16 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 #endif
558 #endif
559#endif
560
561#ifndef ECB_MEMORY_FENCE
562 #if ECB_GCC_VERSION(4,4)
563 #define ECB_MEMORY_FENCE __sync_synchronize ()
564 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
565 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
566 #elif _MSC_VER >= 1400 /* VC++ 2005 */
567 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
568 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
569 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
570 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
571 #elif defined(_WIN32)
572 #include <WinNT.h>
573 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
574 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
575 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
576 #endif
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 /*
581 * if you get undefined symbol references to pthread_mutex_lock,
582 * or failure to find pthread.h, then you should implement
583 * the ECB_MEMORY_FENCE operations for your cpu/compiler
584 * OR provide pthread.h and link against the posix thread library
585 * of your system.
586 */
587 #include <pthread.h>
588 #define ECB_NEEDS_PTHREADS 1
589 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
590
591 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
592 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
593 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
594 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
595#endif
596
597/*****************************************************************************/
598
599#define ECB_C99 (__STDC_VERSION__ >= 199901L)
600
601#if __cplusplus
602 #define ecb_inline static inline
603#elif ECB_GCC_VERSION(2,5)
604 #define ecb_inline static __inline__
605#elif ECB_C99
606 #define ecb_inline static inline
607#else
608 #define ecb_inline static
609#endif
610
611#if ECB_GCC_VERSION(3,3)
612 #define ecb_restrict __restrict__
613#elif ECB_C99
614 #define ecb_restrict restrict
615#else
616 #define ecb_restrict
617#endif
618
619typedef int ecb_bool;
620
621#define ECB_CONCAT_(a, b) a ## b
622#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
623#define ECB_STRINGIFY_(a) # a
624#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
625
626#define ecb_function_ ecb_inline
627
628#if ECB_GCC_VERSION(3,1)
629 #define ecb_attribute(attrlist) __attribute__(attrlist)
630 #define ecb_is_constant(expr) __builtin_constant_p (expr)
631 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
632 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
633#else
634 #define ecb_attribute(attrlist)
635 #define ecb_is_constant(expr) 0
636 #define ecb_expect(expr,value) (expr)
637 #define ecb_prefetch(addr,rw,locality)
638#endif
639
640/* no emulation for ecb_decltype */
641#if ECB_GCC_VERSION(4,5)
642 #define ecb_decltype(x) __decltype(x)
643#elif ECB_GCC_VERSION(3,0)
644 #define ecb_decltype(x) __typeof(x)
645#endif
646
647#define ecb_noinline ecb_attribute ((__noinline__))
648#define ecb_noreturn ecb_attribute ((__noreturn__))
649#define ecb_unused ecb_attribute ((__unused__))
650#define ecb_const ecb_attribute ((__const__))
651#define ecb_pure ecb_attribute ((__pure__))
652
653#if ECB_GCC_VERSION(4,3)
654 #define ecb_artificial ecb_attribute ((__artificial__))
655 #define ecb_hot ecb_attribute ((__hot__))
656 #define ecb_cold ecb_attribute ((__cold__))
657#else
658 #define ecb_artificial
659 #define ecb_hot
660 #define ecb_cold
661#endif
662
663/* put around conditional expressions if you are very sure that the */
664/* expression is mostly true or mostly false. note that these return */
665/* booleans, not the expression. */
475#define expect_false(expr) expect ((expr) != 0, 0) 666#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
476#define expect_true(expr) expect ((expr) != 0, 1) 667#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
668/* for compatibility to the rest of the world */
669#define ecb_likely(expr) ecb_expect_true (expr)
670#define ecb_unlikely(expr) ecb_expect_false (expr)
671
672/* count trailing zero bits and count # of one bits */
673#if ECB_GCC_VERSION(3,4)
674 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
675 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
676 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
677 #define ecb_ctz32(x) __builtin_ctz (x)
678 #define ecb_ctz64(x) __builtin_ctzll (x)
679 #define ecb_popcount32(x) __builtin_popcount (x)
680 /* no popcountll */
681#else
682 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
683 ecb_function_ int
684 ecb_ctz32 (uint32_t x)
685 {
686 int r = 0;
687
688 x &= ~x + 1; /* this isolates the lowest bit */
689
690#if ECB_branchless_on_i386
691 r += !!(x & 0xaaaaaaaa) << 0;
692 r += !!(x & 0xcccccccc) << 1;
693 r += !!(x & 0xf0f0f0f0) << 2;
694 r += !!(x & 0xff00ff00) << 3;
695 r += !!(x & 0xffff0000) << 4;
696#else
697 if (x & 0xaaaaaaaa) r += 1;
698 if (x & 0xcccccccc) r += 2;
699 if (x & 0xf0f0f0f0) r += 4;
700 if (x & 0xff00ff00) r += 8;
701 if (x & 0xffff0000) r += 16;
702#endif
703
704 return r;
705 }
706
707 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
708 ecb_function_ int
709 ecb_ctz64 (uint64_t x)
710 {
711 int shift = x & 0xffffffffU ? 0 : 32;
712 return ecb_ctz32 (x >> shift) + shift;
713 }
714
715 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
716 ecb_function_ int
717 ecb_popcount32 (uint32_t x)
718 {
719 x -= (x >> 1) & 0x55555555;
720 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
721 x = ((x >> 4) + x) & 0x0f0f0f0f;
722 x *= 0x01010101;
723
724 return x >> 24;
725 }
726
727 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
728 ecb_function_ int ecb_ld32 (uint32_t x)
729 {
730 int r = 0;
731
732 if (x >> 16) { x >>= 16; r += 16; }
733 if (x >> 8) { x >>= 8; r += 8; }
734 if (x >> 4) { x >>= 4; r += 4; }
735 if (x >> 2) { x >>= 2; r += 2; }
736 if (x >> 1) { r += 1; }
737
738 return r;
739 }
740
741 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
742 ecb_function_ int ecb_ld64 (uint64_t x)
743 {
744 int r = 0;
745
746 if (x >> 32) { x >>= 32; r += 32; }
747
748 return r + ecb_ld32 (x);
749 }
750#endif
751
752/* popcount64 is only available on 64 bit cpus as gcc builtin */
753/* so for this version we are lazy */
754ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
755ecb_function_ int
756ecb_popcount64 (uint64_t x)
757{
758 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
759}
760
761ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
762ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
763ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
764ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
765ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
766ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
767ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
768ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
769
770ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
771ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
772ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
773ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
774ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
775ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
776ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
777ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
778
779#if ECB_GCC_VERSION(4,3)
780 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
781 #define ecb_bswap32(x) __builtin_bswap32 (x)
782 #define ecb_bswap64(x) __builtin_bswap64 (x)
783#else
784 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
785 ecb_function_ uint16_t
786 ecb_bswap16 (uint16_t x)
787 {
788 return ecb_rotl16 (x, 8);
789 }
790
791 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
792 ecb_function_ uint32_t
793 ecb_bswap32 (uint32_t x)
794 {
795 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
796 }
797
798 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
799 ecb_function_ uint64_t
800 ecb_bswap64 (uint64_t x)
801 {
802 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
803 }
804#endif
805
806#if ECB_GCC_VERSION(4,5)
807 #define ecb_unreachable() __builtin_unreachable ()
808#else
809 /* this seems to work fine, but gcc always emits a warning for it :/ */
810 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
811 ecb_function_ void ecb_unreachable (void) { }
812#endif
813
814/* try to tell the compiler that some condition is definitely true */
815#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
816
817ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
818ecb_function_ unsigned char
819ecb_byteorder_helper (void)
820{
821 const uint32_t u = 0x11223344;
822 return *(unsigned char *)&u;
823}
824
825ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
826ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
827ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
828ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
829
830#if ECB_GCC_VERSION(3,0) || ECB_C99
831 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
832#else
833 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
834#endif
835
836#if ecb_cplusplus_does_not_suck
837 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
838 template<typename T, int N>
839 static inline int ecb_array_length (const T (&arr)[N])
840 {
841 return N;
842 }
843#else
844 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
845#endif
846
847#endif
848
849/* ECB.H END */
850
851#define expect_false(cond) ecb_expect_false (cond)
852#define expect_true(cond) ecb_expect_true (cond)
853#define noinline ecb_noinline
854
477#define inline_size static inline 855#define inline_size ecb_inline
478 856
479#if EV_MINIMAL 857#if EV_FEATURE_CODE
858# define inline_speed ecb_inline
859#else
480# define inline_speed static noinline 860# define inline_speed static noinline
481#else
482# define inline_speed static inline
483#endif 861#endif
484 862
485#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 863#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
486 864
487#if EV_MINPRI == EV_MAXPRI 865#if EV_MINPRI == EV_MAXPRI
… …
500#define ev_active(w) ((W)(w))->active 878#define ev_active(w) ((W)(w))->active
501#define ev_at(w) ((WT)(w))->at 879#define ev_at(w) ((WT)(w))->at
502 880
503#if EV_USE_REALTIME 881#if EV_USE_REALTIME
504/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 882/* 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 */ 883/* giving it a reasonably high chance of working on typical architectures */
506static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 884static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
507#endif 885#endif
508 886
509#if EV_USE_MONOTONIC 887#if EV_USE_MONOTONIC
510static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 888static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
524# include "ev_win32.c" 902# include "ev_win32.c"
525#endif 903#endif
526 904
527/*****************************************************************************/ 905/*****************************************************************************/
528 906
907/* define a suitable floor function (only used by periodics atm) */
908
909#if EV_USE_FLOOR
910# include <math.h>
911# define ev_floor(v) floor (v)
912#else
913
914#include <float.h>
915
916/* a floor() replacement function, should be independent of ev_tstamp type */
917static ev_tstamp noinline
918ev_floor (ev_tstamp v)
919{
920 /* the choice of shift factor is not terribly important */
921#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
922 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
923#else
924 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
925#endif
926
927 /* argument too large for an unsigned long? */
928 if (expect_false (v >= shift))
929 {
930 ev_tstamp f;
931
932 if (v == v - 1.)
933 return v; /* very large number */
934
935 f = shift * ev_floor (v * (1. / shift));
936 return f + ev_floor (v - f);
937 }
938
939 /* special treatment for negative args? */
940 if (expect_false (v < 0.))
941 {
942 ev_tstamp f = -ev_floor (-v);
943
944 return f - (f == v ? 0 : 1);
945 }
946
947 /* fits into an unsigned long */
948 return (unsigned long)v;
949}
950
951#endif
952
953/*****************************************************************************/
954
955#ifdef __linux
956# include <sys/utsname.h>
957#endif
958
959static unsigned int noinline ecb_cold
960ev_linux_version (void)
961{
962#ifdef __linux
963 unsigned int v = 0;
964 struct utsname buf;
965 int i;
966 char *p = buf.release;
967
968 if (uname (&buf))
969 return 0;
970
971 for (i = 3+1; --i; )
972 {
973 unsigned int c = 0;
974
975 for (;;)
976 {
977 if (*p >= '0' && *p <= '9')
978 c = c * 10 + *p++ - '0';
979 else
980 {
981 p += *p == '.';
982 break;
983 }
984 }
985
986 v = (v << 8) | c;
987 }
988
989 return v;
990#else
991 return 0;
992#endif
993}
994
995/*****************************************************************************/
996
997#if EV_AVOID_STDIO
998static void noinline ecb_cold
999ev_printerr (const char *msg)
1000{
1001 write (STDERR_FILENO, msg, strlen (msg));
1002}
1003#endif
1004
529static void (*syserr_cb)(const char *msg); 1005static void (*syserr_cb)(const char *msg);
530 1006
531void 1007void ecb_cold
532ev_set_syserr_cb (void (*cb)(const char *msg)) 1008ev_set_syserr_cb (void (*cb)(const char *msg))
533{ 1009{
534 syserr_cb = cb; 1010 syserr_cb = cb;
535} 1011}
536 1012
537static void noinline 1013static void noinline ecb_cold
538ev_syserr (const char *msg) 1014ev_syserr (const char *msg)
539{ 1015{
540 if (!msg) 1016 if (!msg)
541 msg = "(libev) system error"; 1017 msg = "(libev) system error";
542 1018
543 if (syserr_cb) 1019 if (syserr_cb)
544 syserr_cb (msg); 1020 syserr_cb (msg);
545 else 1021 else
546 { 1022 {
1023#if EV_AVOID_STDIO
1024 ev_printerr (msg);
1025 ev_printerr (": ");
1026 ev_printerr (strerror (errno));
1027 ev_printerr ("\n");
1028#else
547 perror (msg); 1029 perror (msg);
1030#endif
548 abort (); 1031 abort ();
549 } 1032 }
550} 1033}
551 1034
552static void * 1035static void *
553ev_realloc_emul (void *ptr, long size) 1036ev_realloc_emul (void *ptr, long size)
554{ 1037{
1038#if __GLIBC__
1039 return realloc (ptr, size);
1040#else
555 /* some systems, notably openbsd and darwin, fail to properly 1041 /* some systems, notably openbsd and darwin, fail to properly
556 * implement realloc (x, 0) (as required by both ansi c-98 and 1042 * implement realloc (x, 0) (as required by both ansi c-89 and
557 * the single unix specification, so work around them here. 1043 * the single unix specification, so work around them here.
558 */ 1044 */
559 1045
560 if (size) 1046 if (size)
561 return realloc (ptr, size); 1047 return realloc (ptr, size);
562 1048
563 free (ptr); 1049 free (ptr);
564 return 0; 1050 return 0;
1051#endif
565} 1052}
566 1053
567static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1054static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
568 1055
569void 1056void ecb_cold
570ev_set_allocator (void *(*cb)(void *ptr, long size)) 1057ev_set_allocator (void *(*cb)(void *ptr, long size))
571{ 1058{
572 alloc = cb; 1059 alloc = cb;
573} 1060}
574 1061
… …
577{ 1064{
578 ptr = alloc (ptr, size); 1065 ptr = alloc (ptr, size);
579 1066
580 if (!ptr && size) 1067 if (!ptr && size)
581 { 1068 {
1069#if EV_AVOID_STDIO
1070 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1071#else
582 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1072 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1073#endif
583 abort (); 1074 abort ();
584 } 1075 }
585 1076
586 return ptr; 1077 return ptr;
587} 1078}
… …
603 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1094 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
604 unsigned char unused; 1095 unsigned char unused;
605#if EV_USE_EPOLL 1096#if EV_USE_EPOLL
606 unsigned int egen; /* generation counter to counter epoll bugs */ 1097 unsigned int egen; /* generation counter to counter epoll bugs */
607#endif 1098#endif
608#if EV_SELECT_IS_WINSOCKET 1099#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
609 SOCKET handle; 1100 SOCKET handle;
1101#endif
1102#if EV_USE_IOCP
1103 OVERLAPPED or, ow;
610#endif 1104#endif
611} ANFD; 1105} ANFD;
612 1106
613/* stores the pending event set for a given watcher */ 1107/* stores the pending event set for a given watcher */
614typedef struct 1108typedef struct
… …
669 1163
670 static int ev_default_loop_ptr; 1164 static int ev_default_loop_ptr;
671 1165
672#endif 1166#endif
673 1167
674#if EV_MINIMAL < 2 1168#if EV_FEATURE_API
675# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1169# 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) 1170# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
677# define EV_INVOKE_PENDING invoke_cb (EV_A) 1171# define EV_INVOKE_PENDING invoke_cb (EV_A)
678#else 1172#else
679# define EV_RELEASE_CB (void)0 1173# define EV_RELEASE_CB (void)0
680# define EV_ACQUIRE_CB (void)0 1174# define EV_ACQUIRE_CB (void)0
681# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1175# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
682#endif 1176#endif
683 1177
684#define EVUNLOOP_RECURSE 0x80 1178#define EVBREAK_RECURSE 0x80
685 1179
686/*****************************************************************************/ 1180/*****************************************************************************/
687 1181
688#ifndef EV_HAVE_EV_TIME 1182#ifndef EV_HAVE_EV_TIME
689ev_tstamp 1183ev_tstamp
… …
733 if (delay > 0.) 1227 if (delay > 0.)
734 { 1228 {
735#if EV_USE_NANOSLEEP 1229#if EV_USE_NANOSLEEP
736 struct timespec ts; 1230 struct timespec ts;
737 1231
738 ts.tv_sec = (time_t)delay; 1232 EV_TS_SET (ts, delay);
739 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
740
741 nanosleep (&ts, 0); 1233 nanosleep (&ts, 0);
742#elif defined(_WIN32) 1234#elif defined(_WIN32)
743 Sleep ((unsigned long)(delay * 1e3)); 1235 Sleep ((unsigned long)(delay * 1e3));
744#else 1236#else
745 struct timeval tv; 1237 struct timeval tv;
746 1238
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 */ 1239 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
751 /* something not guaranteed by newer posix versions, but guaranteed */ 1240 /* something not guaranteed by newer posix versions, but guaranteed */
752 /* by older ones */ 1241 /* by older ones */
1242 EV_TV_SET (tv, delay);
753 select (0, 0, 0, 0, &tv); 1243 select (0, 0, 0, 0, &tv);
754#endif 1244#endif
755 } 1245 }
756} 1246}
757 1247
758/*****************************************************************************/ 1248/*****************************************************************************/
759 1249
760#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1250#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
761 1251
762/* find a suitable new size for the given array, */ 1252/* find a suitable new size for the given array, */
763/* hopefully by rounding to a ncie-to-malloc size */ 1253/* hopefully by rounding to a nice-to-malloc size */
764inline_size int 1254inline_size int
765array_nextsize (int elem, int cur, int cnt) 1255array_nextsize (int elem, int cur, int cnt)
766{ 1256{
767 int ncur = cur + 1; 1257 int ncur = cur + 1;
768 1258
… …
780 } 1270 }
781 1271
782 return ncur; 1272 return ncur;
783} 1273}
784 1274
785static noinline void * 1275static void * noinline ecb_cold
786array_realloc (int elem, void *base, int *cur, int cnt) 1276array_realloc (int elem, void *base, int *cur, int cnt)
787{ 1277{
788 *cur = array_nextsize (elem, *cur, cnt); 1278 *cur = array_nextsize (elem, *cur, cnt);
789 return ev_realloc (base, elem * *cur); 1279 return ev_realloc (base, elem * *cur);
790} 1280}
… …
793 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1283 memset ((void *)(base), 0, sizeof (*(base)) * (count))
794 1284
795#define array_needsize(type,base,cur,cnt,init) \ 1285#define array_needsize(type,base,cur,cnt,init) \
796 if (expect_false ((cnt) > (cur))) \ 1286 if (expect_false ((cnt) > (cur))) \
797 { \ 1287 { \
798 int ocur_ = (cur); \ 1288 int ecb_unused ocur_ = (cur); \
799 (base) = (type *)array_realloc \ 1289 (base) = (type *)array_realloc \
800 (sizeof (type), (base), &(cur), (cnt)); \ 1290 (sizeof (type), (base), &(cur), (cnt)); \
801 init ((base) + (ocur_), (cur) - ocur_); \ 1291 init ((base) + (ocur_), (cur) - ocur_); \
802 } 1292 }
803 1293
… …
864} 1354}
865 1355
866/*****************************************************************************/ 1356/*****************************************************************************/
867 1357
868inline_speed void 1358inline_speed void
869fd_event_nc (EV_P_ int fd, int revents) 1359fd_event_nocheck (EV_P_ int fd, int revents)
870{ 1360{
871 ANFD *anfd = anfds + fd; 1361 ANFD *anfd = anfds + fd;
872 ev_io *w; 1362 ev_io *w;
873 1363
874 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1364 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
886fd_event (EV_P_ int fd, int revents) 1376fd_event (EV_P_ int fd, int revents)
887{ 1377{
888 ANFD *anfd = anfds + fd; 1378 ANFD *anfd = anfds + fd;
889 1379
890 if (expect_true (!anfd->reify)) 1380 if (expect_true (!anfd->reify))
891 fd_event_nc (EV_A_ fd, revents); 1381 fd_event_nocheck (EV_A_ fd, revents);
892} 1382}
893 1383
894void 1384void
895ev_feed_fd_event (EV_P_ int fd, int revents) 1385ev_feed_fd_event (EV_P_ int fd, int revents)
896{ 1386{
897 if (fd >= 0 && fd < anfdmax) 1387 if (fd >= 0 && fd < anfdmax)
898 fd_event_nc (EV_A_ fd, revents); 1388 fd_event_nocheck (EV_A_ fd, revents);
899} 1389}
900 1390
901/* make sure the external fd watch events are in-sync */ 1391/* make sure the external fd watch events are in-sync */
902/* with the kernel/libev internal state */ 1392/* with the kernel/libev internal state */
903inline_size void 1393inline_size void
904fd_reify (EV_P) 1394fd_reify (EV_P)
905{ 1395{
906 int i; 1396 int i;
907 1397
1398#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1399 for (i = 0; i < fdchangecnt; ++i)
1400 {
1401 int fd = fdchanges [i];
1402 ANFD *anfd = anfds + fd;
1403
1404 if (anfd->reify & EV__IOFDSET && anfd->head)
1405 {
1406 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1407
1408 if (handle != anfd->handle)
1409 {
1410 unsigned long arg;
1411
1412 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1413
1414 /* handle changed, but fd didn't - we need to do it in two steps */
1415 backend_modify (EV_A_ fd, anfd->events, 0);
1416 anfd->events = 0;
1417 anfd->handle = handle;
1418 }
1419 }
1420 }
1421#endif
1422
908 for (i = 0; i < fdchangecnt; ++i) 1423 for (i = 0; i < fdchangecnt; ++i)
909 { 1424 {
910 int fd = fdchanges [i]; 1425 int fd = fdchanges [i];
911 ANFD *anfd = anfds + fd; 1426 ANFD *anfd = anfds + fd;
912 ev_io *w; 1427 ev_io *w;
913 1428
914 unsigned char events = 0; 1429 unsigned char o_events = anfd->events;
1430 unsigned char o_reify = anfd->reify;
915 1431
916 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1432 anfd->reify = 0;
917 events |= (unsigned char)w->events;
918 1433
919#if EV_SELECT_IS_WINSOCKET 1434 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
920 if (events)
921 { 1435 {
922 unsigned long arg; 1436 anfd->events = 0;
923 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1437
924 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1438 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1439 anfd->events |= (unsigned char)w->events;
1440
1441 if (o_events != anfd->events)
1442 o_reify = EV__IOFDSET; /* actually |= */
925 } 1443 }
926#endif
927 1444
928 { 1445 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); 1446 backend_modify (EV_A_ fd, o_events, anfd->events);
937 }
938 } 1447 }
939 1448
940 fdchangecnt = 0; 1449 fdchangecnt = 0;
941} 1450}
942 1451
… …
954 fdchanges [fdchangecnt - 1] = fd; 1463 fdchanges [fdchangecnt - 1] = fd;
955 } 1464 }
956} 1465}
957 1466
958/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1467/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
959inline_speed void 1468inline_speed void ecb_cold
960fd_kill (EV_P_ int fd) 1469fd_kill (EV_P_ int fd)
961{ 1470{
962 ev_io *w; 1471 ev_io *w;
963 1472
964 while ((w = (ev_io *)anfds [fd].head)) 1473 while ((w = (ev_io *)anfds [fd].head))
… …
966 ev_io_stop (EV_A_ w); 1475 ev_io_stop (EV_A_ w);
967 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1476 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
968 } 1477 }
969} 1478}
970 1479
971/* check whether the given fd is atcually valid, for error recovery */ 1480/* check whether the given fd is actually valid, for error recovery */
972inline_size int 1481inline_size int ecb_cold
973fd_valid (int fd) 1482fd_valid (int fd)
974{ 1483{
975#ifdef _WIN32 1484#ifdef _WIN32
976 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1485 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
977#else 1486#else
978 return fcntl (fd, F_GETFD) != -1; 1487 return fcntl (fd, F_GETFD) != -1;
979#endif 1488#endif
980} 1489}
981 1490
982/* called on EBADF to verify fds */ 1491/* called on EBADF to verify fds */
983static void noinline 1492static void noinline ecb_cold
984fd_ebadf (EV_P) 1493fd_ebadf (EV_P)
985{ 1494{
986 int fd; 1495 int fd;
987 1496
988 for (fd = 0; fd < anfdmax; ++fd) 1497 for (fd = 0; fd < anfdmax; ++fd)
… …
990 if (!fd_valid (fd) && errno == EBADF) 1499 if (!fd_valid (fd) && errno == EBADF)
991 fd_kill (EV_A_ fd); 1500 fd_kill (EV_A_ fd);
992} 1501}
993 1502
994/* called on ENOMEM in select/poll to kill some fds and retry */ 1503/* called on ENOMEM in select/poll to kill some fds and retry */
995static void noinline 1504static void noinline ecb_cold
996fd_enomem (EV_P) 1505fd_enomem (EV_P)
997{ 1506{
998 int fd; 1507 int fd;
999 1508
1000 for (fd = anfdmax; fd--; ) 1509 for (fd = anfdmax; fd--; )
… …
1018 anfds [fd].emask = 0; 1527 anfds [fd].emask = 0;
1019 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 1528 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1020 } 1529 }
1021} 1530}
1022 1531
1532/* used to prepare libev internal fd's */
1533/* this is not fork-safe */
1534inline_speed void
1535fd_intern (int fd)
1536{
1537#ifdef _WIN32
1538 unsigned long arg = 1;
1539 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1540#else
1541 fcntl (fd, F_SETFD, FD_CLOEXEC);
1542 fcntl (fd, F_SETFL, O_NONBLOCK);
1543#endif
1544}
1545
1023/*****************************************************************************/ 1546/*****************************************************************************/
1024 1547
1025/* 1548/*
1026 * the heap functions want a real array index. array index 0 uis guaranteed to not 1549 * 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 1550 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1028 * the branching factor of the d-tree. 1551 * the branching factor of the d-tree.
1029 */ 1552 */
1030 1553
1031/* 1554/*
… …
1179 1702
1180static ANSIG signals [EV_NSIG - 1]; 1703static ANSIG signals [EV_NSIG - 1];
1181 1704
1182/*****************************************************************************/ 1705/*****************************************************************************/
1183 1706
1184/* used to prepare libev internal fd's */ 1707#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 1708
1198static void noinline 1709static void noinline ecb_cold
1199evpipe_init (EV_P) 1710evpipe_init (EV_P)
1200{ 1711{
1201 if (!ev_is_active (&pipe_w)) 1712 if (!ev_is_active (&pipe_w))
1202 { 1713 {
1203#if EV_USE_EVENTFD 1714# if EV_USE_EVENTFD
1204 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 1715 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1205 if (evfd < 0 && errno == EINVAL) 1716 if (evfd < 0 && errno == EINVAL)
1206 evfd = eventfd (0, 0); 1717 evfd = eventfd (0, 0);
1207 1718
1208 if (evfd >= 0) 1719 if (evfd >= 0)
… …
1210 evpipe [0] = -1; 1721 evpipe [0] = -1;
1211 fd_intern (evfd); /* doing it twice doesn't hurt */ 1722 fd_intern (evfd); /* doing it twice doesn't hurt */
1212 ev_io_set (&pipe_w, evfd, EV_READ); 1723 ev_io_set (&pipe_w, evfd, EV_READ);
1213 } 1724 }
1214 else 1725 else
1215#endif 1726# endif
1216 { 1727 {
1217 while (pipe (evpipe)) 1728 while (pipe (evpipe))
1218 ev_syserr ("(libev) error creating signal/async pipe"); 1729 ev_syserr ("(libev) error creating signal/async pipe");
1219 1730
1220 fd_intern (evpipe [0]); 1731 fd_intern (evpipe [0]);
… …
1225 ev_io_start (EV_A_ &pipe_w); 1736 ev_io_start (EV_A_ &pipe_w);
1226 ev_unref (EV_A); /* watcher should not keep loop alive */ 1737 ev_unref (EV_A); /* watcher should not keep loop alive */
1227 } 1738 }
1228} 1739}
1229 1740
1230inline_size void 1741inline_speed void
1231evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1742evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1232{ 1743{
1233 if (!*flag) 1744 if (expect_true (*flag))
1745 return;
1746
1747 *flag = 1;
1748
1749 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1750
1751 pipe_write_skipped = 1;
1752
1753 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1754
1755 if (pipe_write_wanted)
1234 { 1756 {
1757 int old_errno;
1758
1759 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1760
1235 int old_errno = errno; /* save errno because write might clobber it */ 1761 old_errno = errno; /* save errno because write will clobber it */
1236
1237 *flag = 1;
1238 1762
1239#if EV_USE_EVENTFD 1763#if EV_USE_EVENTFD
1240 if (evfd >= 0) 1764 if (evfd >= 0)
1241 { 1765 {
1242 uint64_t counter = 1; 1766 uint64_t counter = 1;
1243 write (evfd, &counter, sizeof (uint64_t)); 1767 write (evfd, &counter, sizeof (uint64_t));
1244 } 1768 }
1245 else 1769 else
1246#endif 1770#endif
1771 {
1772 /* win32 people keep sending patches that change this write() to send() */
1773 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1774 /* so when you think this write should be a send instead, please find out */
1775 /* where your send() is from - it's definitely not the microsoft send, and */
1776 /* tell me. thank you. */
1247 write (evpipe [1], &old_errno, 1); 1777 write (evpipe [1], &(evpipe [1]), 1);
1778 }
1248 1779
1249 errno = old_errno; 1780 errno = old_errno;
1250 } 1781 }
1251} 1782}
1252 1783
… …
1255static void 1786static void
1256pipecb (EV_P_ ev_io *iow, int revents) 1787pipecb (EV_P_ ev_io *iow, int revents)
1257{ 1788{
1258 int i; 1789 int i;
1259 1790
1791 if (revents & EV_READ)
1792 {
1260#if EV_USE_EVENTFD 1793#if EV_USE_EVENTFD
1261 if (evfd >= 0) 1794 if (evfd >= 0)
1262 { 1795 {
1263 uint64_t counter; 1796 uint64_t counter;
1264 read (evfd, &counter, sizeof (uint64_t)); 1797 read (evfd, &counter, sizeof (uint64_t));
1265 } 1798 }
1266 else 1799 else
1267#endif 1800#endif
1268 { 1801 {
1269 char dummy; 1802 char dummy;
1803 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1270 read (evpipe [0], &dummy, 1); 1804 read (evpipe [0], &dummy, 1);
1805 }
1271 } 1806 }
1272 1807
1808 pipe_write_skipped = 0;
1809
1810#if EV_SIGNAL_ENABLE
1273 if (sig_pending) 1811 if (sig_pending)
1274 { 1812 {
1275 sig_pending = 0; 1813 sig_pending = 0;
1276 1814
1277 for (i = EV_NSIG - 1; i--; ) 1815 for (i = EV_NSIG - 1; i--; )
1278 if (expect_false (signals [i].pending)) 1816 if (expect_false (signals [i].pending))
1279 ev_feed_signal_event (EV_A_ i + 1); 1817 ev_feed_signal_event (EV_A_ i + 1);
1280 } 1818 }
1819#endif
1281 1820
1282#if EV_ASYNC_ENABLE 1821#if EV_ASYNC_ENABLE
1283 if (async_pending) 1822 if (async_pending)
1284 { 1823 {
1285 async_pending = 0; 1824 async_pending = 0;
… …
1294#endif 1833#endif
1295} 1834}
1296 1835
1297/*****************************************************************************/ 1836/*****************************************************************************/
1298 1837
1838void
1839ev_feed_signal (int signum)
1840{
1841#if EV_MULTIPLICITY
1842 EV_P = signals [signum - 1].loop;
1843
1844 if (!EV_A)
1845 return;
1846#endif
1847
1848 if (!ev_active (&pipe_w))
1849 return;
1850
1851 signals [signum - 1].pending = 1;
1852 evpipe_write (EV_A_ &sig_pending);
1853}
1854
1299static void 1855static void
1300ev_sighandler (int signum) 1856ev_sighandler (int signum)
1301{ 1857{
1302#if EV_MULTIPLICITY
1303 EV_P = signals [signum - 1].loop;
1304#endif
1305
1306#ifdef _WIN32 1858#ifdef _WIN32
1307 signal (signum, ev_sighandler); 1859 signal (signum, ev_sighandler);
1308#endif 1860#endif
1309 1861
1310 signals [signum - 1].pending = 1; 1862 ev_feed_signal (signum);
1311 evpipe_write (EV_A_ &sig_pending);
1312} 1863}
1313 1864
1314void noinline 1865void noinline
1315ev_feed_signal_event (EV_P_ int signum) 1866ev_feed_signal_event (EV_P_ int signum)
1316{ 1867{
… …
1353 break; 1904 break;
1354 } 1905 }
1355} 1906}
1356#endif 1907#endif
1357 1908
1909#endif
1910
1358/*****************************************************************************/ 1911/*****************************************************************************/
1359 1912
1913#if EV_CHILD_ENABLE
1360static WL childs [EV_PID_HASHSIZE]; 1914static WL childs [EV_PID_HASHSIZE];
1361
1362#ifndef _WIN32
1363 1915
1364static ev_signal childev; 1916static ev_signal childev;
1365 1917
1366#ifndef WIFCONTINUED 1918#ifndef WIFCONTINUED
1367# define WIFCONTINUED(status) 0 1919# define WIFCONTINUED(status) 0
… …
1372child_reap (EV_P_ int chain, int pid, int status) 1924child_reap (EV_P_ int chain, int pid, int status)
1373{ 1925{
1374 ev_child *w; 1926 ev_child *w;
1375 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1927 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1376 1928
1377 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1929 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1378 { 1930 {
1379 if ((w->pid == pid || !w->pid) 1931 if ((w->pid == pid || !w->pid)
1380 && (!traced || (w->flags & 1))) 1932 && (!traced || (w->flags & 1)))
1381 { 1933 {
1382 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1934 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 */ 1959 /* 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 */ 1960 /* 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); 1961 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1410 1962
1411 child_reap (EV_A_ pid, pid, status); 1963 child_reap (EV_A_ pid, pid, status);
1412 if (EV_PID_HASHSIZE > 1) 1964 if ((EV_PID_HASHSIZE) > 1)
1413 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1965 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1414} 1966}
1415 1967
1416#endif 1968#endif
1417 1969
1418/*****************************************************************************/ 1970/*****************************************************************************/
1419 1971
1972#if EV_USE_IOCP
1973# include "ev_iocp.c"
1974#endif
1420#if EV_USE_PORT 1975#if EV_USE_PORT
1421# include "ev_port.c" 1976# include "ev_port.c"
1422#endif 1977#endif
1423#if EV_USE_KQUEUE 1978#if EV_USE_KQUEUE
1424# include "ev_kqueue.c" 1979# include "ev_kqueue.c"
… …
1431#endif 1986#endif
1432#if EV_USE_SELECT 1987#if EV_USE_SELECT
1433# include "ev_select.c" 1988# include "ev_select.c"
1434#endif 1989#endif
1435 1990
1436int 1991int ecb_cold
1437ev_version_major (void) 1992ev_version_major (void)
1438{ 1993{
1439 return EV_VERSION_MAJOR; 1994 return EV_VERSION_MAJOR;
1440} 1995}
1441 1996
1442int 1997int ecb_cold
1443ev_version_minor (void) 1998ev_version_minor (void)
1444{ 1999{
1445 return EV_VERSION_MINOR; 2000 return EV_VERSION_MINOR;
1446} 2001}
1447 2002
1448/* return true if we are running with elevated privileges and should ignore env variables */ 2003/* return true if we are running with elevated privileges and should ignore env variables */
1449int inline_size 2004int inline_size ecb_cold
1450enable_secure (void) 2005enable_secure (void)
1451{ 2006{
1452#ifdef _WIN32 2007#ifdef _WIN32
1453 return 0; 2008 return 0;
1454#else 2009#else
1455 return getuid () != geteuid () 2010 return getuid () != geteuid ()
1456 || getgid () != getegid (); 2011 || getgid () != getegid ();
1457#endif 2012#endif
1458} 2013}
1459 2014
1460unsigned int 2015unsigned int ecb_cold
1461ev_supported_backends (void) 2016ev_supported_backends (void)
1462{ 2017{
1463 unsigned int flags = 0; 2018 unsigned int flags = 0;
1464 2019
1465 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2020 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1469 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2024 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1470 2025
1471 return flags; 2026 return flags;
1472} 2027}
1473 2028
1474unsigned int 2029unsigned int ecb_cold
1475ev_recommended_backends (void) 2030ev_recommended_backends (void)
1476{ 2031{
1477 unsigned int flags = ev_supported_backends (); 2032 unsigned int flags = ev_supported_backends ();
1478 2033
1479#ifndef __NetBSD__ 2034#ifndef __NetBSD__
… …
1484#ifdef __APPLE__ 2039#ifdef __APPLE__
1485 /* only select works correctly on that "unix-certified" platform */ 2040 /* only select works correctly on that "unix-certified" platform */
1486 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2041 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1487 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2042 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1488#endif 2043#endif
2044#ifdef __FreeBSD__
2045 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2046#endif
1489 2047
1490 return flags; 2048 return flags;
1491} 2049}
1492 2050
1493unsigned int 2051unsigned int ecb_cold
1494ev_embeddable_backends (void) 2052ev_embeddable_backends (void)
1495{ 2053{
1496 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2054 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1497 2055
1498 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2056 /* 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 */ 2057 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1500 flags &= ~EVBACKEND_EPOLL; 2058 flags &= ~EVBACKEND_EPOLL;
1501 2059
1502 return flags; 2060 return flags;
1503} 2061}
1504 2062
1505unsigned int 2063unsigned int
1506ev_backend (EV_P) 2064ev_backend (EV_P)
1507{ 2065{
1508 return backend; 2066 return backend;
1509} 2067}
1510 2068
1511#if EV_MINIMAL < 2 2069#if EV_FEATURE_API
1512unsigned int 2070unsigned int
1513ev_loop_count (EV_P) 2071ev_iteration (EV_P)
1514{ 2072{
1515 return loop_count; 2073 return loop_count;
1516} 2074}
1517 2075
1518unsigned int 2076unsigned int
1519ev_loop_depth (EV_P) 2077ev_depth (EV_P)
1520{ 2078{
1521 return loop_depth; 2079 return loop_depth;
1522} 2080}
1523 2081
1524void 2082void
… …
1543ev_userdata (EV_P) 2101ev_userdata (EV_P)
1544{ 2102{
1545 return userdata; 2103 return userdata;
1546} 2104}
1547 2105
2106void
1548void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2107ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1549{ 2108{
1550 invoke_cb = invoke_pending_cb; 2109 invoke_cb = invoke_pending_cb;
1551} 2110}
1552 2111
2112void
1553void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2113ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1554{ 2114{
1555 release_cb = release; 2115 release_cb = release;
1556 acquire_cb = acquire; 2116 acquire_cb = acquire;
1557} 2117}
1558#endif 2118#endif
1559 2119
1560/* initialise a loop structure, must be zero-initialised */ 2120/* initialise a loop structure, must be zero-initialised */
1561static void noinline 2121static void noinline ecb_cold
1562loop_init (EV_P_ unsigned int flags) 2122loop_init (EV_P_ unsigned int flags)
1563{ 2123{
1564 if (!backend) 2124 if (!backend)
1565 { 2125 {
2126 origflags = flags;
2127
1566#if EV_USE_REALTIME 2128#if EV_USE_REALTIME
1567 if (!have_realtime) 2129 if (!have_realtime)
1568 { 2130 {
1569 struct timespec ts; 2131 struct timespec ts;
1570 2132
… …
1592 if (!(flags & EVFLAG_NOENV) 2154 if (!(flags & EVFLAG_NOENV)
1593 && !enable_secure () 2155 && !enable_secure ()
1594 && getenv ("LIBEV_FLAGS")) 2156 && getenv ("LIBEV_FLAGS"))
1595 flags = atoi (getenv ("LIBEV_FLAGS")); 2157 flags = atoi (getenv ("LIBEV_FLAGS"));
1596 2158
1597 ev_rt_now = ev_time (); 2159 ev_rt_now = ev_time ();
1598 mn_now = get_clock (); 2160 mn_now = get_clock ();
1599 now_floor = mn_now; 2161 now_floor = mn_now;
1600 rtmn_diff = ev_rt_now - mn_now; 2162 rtmn_diff = ev_rt_now - mn_now;
1601#if EV_MINIMAL < 2 2163#if EV_FEATURE_API
1602 invoke_cb = ev_invoke_pending; 2164 invoke_cb = ev_invoke_pending;
1603#endif 2165#endif
1604 2166
1605 io_blocktime = 0.; 2167 io_blocktime = 0.;
1606 timeout_blocktime = 0.; 2168 timeout_blocktime = 0.;
1607 backend = 0; 2169 backend = 0;
1608 backend_fd = -1; 2170 backend_fd = -1;
1609 sig_pending = 0; 2171 sig_pending = 0;
1610#if EV_ASYNC_ENABLE 2172#if EV_ASYNC_ENABLE
1611 async_pending = 0; 2173 async_pending = 0;
1612#endif 2174#endif
2175 pipe_write_skipped = 0;
2176 pipe_write_wanted = 0;
1613#if EV_USE_INOTIFY 2177#if EV_USE_INOTIFY
1614 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2178 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1615#endif 2179#endif
1616#if EV_USE_SIGNALFD 2180#if EV_USE_SIGNALFD
1617 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2181 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1618#endif 2182#endif
1619 2183
1620 if (!(flags & 0x0000ffffU)) 2184 if (!(flags & EVBACKEND_MASK))
1621 flags |= ev_recommended_backends (); 2185 flags |= ev_recommended_backends ();
1622 2186
2187#if EV_USE_IOCP
2188 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2189#endif
1623#if EV_USE_PORT 2190#if EV_USE_PORT
1624 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2191 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1625#endif 2192#endif
1626#if EV_USE_KQUEUE 2193#if EV_USE_KQUEUE
1627 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2194 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1636 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2203 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1637#endif 2204#endif
1638 2205
1639 ev_prepare_init (&pending_w, pendingcb); 2206 ev_prepare_init (&pending_w, pendingcb);
1640 2207
2208#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1641 ev_init (&pipe_w, pipecb); 2209 ev_init (&pipe_w, pipecb);
1642 ev_set_priority (&pipe_w, EV_MAXPRI); 2210 ev_set_priority (&pipe_w, EV_MAXPRI);
2211#endif
1643 } 2212 }
1644} 2213}
1645 2214
1646/* free up a loop structure */ 2215/* free up a loop structure */
1647static void noinline 2216void ecb_cold
1648loop_destroy (EV_P) 2217ev_loop_destroy (EV_P)
1649{ 2218{
1650 int i; 2219 int i;
2220
2221#if EV_MULTIPLICITY
2222 /* mimic free (0) */
2223 if (!EV_A)
2224 return;
2225#endif
2226
2227#if EV_CLEANUP_ENABLE
2228 /* queue cleanup watchers (and execute them) */
2229 if (expect_false (cleanupcnt))
2230 {
2231 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2232 EV_INVOKE_PENDING;
2233 }
2234#endif
2235
2236#if EV_CHILD_ENABLE
2237 if (ev_is_active (&childev))
2238 {
2239 ev_ref (EV_A); /* child watcher */
2240 ev_signal_stop (EV_A_ &childev);
2241 }
2242#endif
1651 2243
1652 if (ev_is_active (&pipe_w)) 2244 if (ev_is_active (&pipe_w))
1653 { 2245 {
1654 /*ev_ref (EV_A);*/ 2246 /*ev_ref (EV_A);*/
1655 /*ev_io_stop (EV_A_ &pipe_w);*/ 2247 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1677#endif 2269#endif
1678 2270
1679 if (backend_fd >= 0) 2271 if (backend_fd >= 0)
1680 close (backend_fd); 2272 close (backend_fd);
1681 2273
2274#if EV_USE_IOCP
2275 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2276#endif
1682#if EV_USE_PORT 2277#if EV_USE_PORT
1683 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2278 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1684#endif 2279#endif
1685#if EV_USE_KQUEUE 2280#if EV_USE_KQUEUE
1686 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2281 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1713 array_free (periodic, EMPTY); 2308 array_free (periodic, EMPTY);
1714#endif 2309#endif
1715#if EV_FORK_ENABLE 2310#if EV_FORK_ENABLE
1716 array_free (fork, EMPTY); 2311 array_free (fork, EMPTY);
1717#endif 2312#endif
2313#if EV_CLEANUP_ENABLE
2314 array_free (cleanup, EMPTY);
2315#endif
1718 array_free (prepare, EMPTY); 2316 array_free (prepare, EMPTY);
1719 array_free (check, EMPTY); 2317 array_free (check, EMPTY);
1720#if EV_ASYNC_ENABLE 2318#if EV_ASYNC_ENABLE
1721 array_free (async, EMPTY); 2319 array_free (async, EMPTY);
1722#endif 2320#endif
1723 2321
1724 backend = 0; 2322 backend = 0;
2323
2324#if EV_MULTIPLICITY
2325 if (ev_is_default_loop (EV_A))
2326#endif
2327 ev_default_loop_ptr = 0;
2328#if EV_MULTIPLICITY
2329 else
2330 ev_free (EV_A);
2331#endif
1725} 2332}
1726 2333
1727#if EV_USE_INOTIFY 2334#if EV_USE_INOTIFY
1728inline_size void infy_fork (EV_P); 2335inline_size void infy_fork (EV_P);
1729#endif 2336#endif
… …
1744 infy_fork (EV_A); 2351 infy_fork (EV_A);
1745#endif 2352#endif
1746 2353
1747 if (ev_is_active (&pipe_w)) 2354 if (ev_is_active (&pipe_w))
1748 { 2355 {
1749 /* this "locks" the handlers against writing to the pipe */ 2356 /* 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 2357
1756 ev_ref (EV_A); 2358 ev_ref (EV_A);
1757 ev_io_stop (EV_A_ &pipe_w); 2359 ev_io_stop (EV_A_ &pipe_w);
1758 2360
1759#if EV_USE_EVENTFD 2361#if EV_USE_EVENTFD
… …
1765 { 2367 {
1766 EV_WIN32_CLOSE_FD (evpipe [0]); 2368 EV_WIN32_CLOSE_FD (evpipe [0]);
1767 EV_WIN32_CLOSE_FD (evpipe [1]); 2369 EV_WIN32_CLOSE_FD (evpipe [1]);
1768 } 2370 }
1769 2371
2372#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1770 evpipe_init (EV_A); 2373 evpipe_init (EV_A);
1771 /* now iterate over everything, in case we missed something */ 2374 /* now iterate over everything, in case we missed something */
1772 pipecb (EV_A_ &pipe_w, EV_READ); 2375 pipecb (EV_A_ &pipe_w, EV_READ);
2376#endif
1773 } 2377 }
1774 2378
1775 postfork = 0; 2379 postfork = 0;
1776} 2380}
1777 2381
1778#if EV_MULTIPLICITY 2382#if EV_MULTIPLICITY
1779 2383
1780struct ev_loop * 2384struct ev_loop * ecb_cold
1781ev_loop_new (unsigned int flags) 2385ev_loop_new (unsigned int flags)
1782{ 2386{
1783 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2387 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1784 2388
1785 memset (EV_A, 0, sizeof (struct ev_loop)); 2389 memset (EV_A, 0, sizeof (struct ev_loop));
1786 loop_init (EV_A_ flags); 2390 loop_init (EV_A_ flags);
1787 2391
1788 if (ev_backend (EV_A)) 2392 if (ev_backend (EV_A))
1789 return EV_A; 2393 return EV_A;
1790 2394
2395 ev_free (EV_A);
1791 return 0; 2396 return 0;
1792} 2397}
1793 2398
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 */ 2399#endif /* multiplicity */
1807 2400
1808#if EV_VERIFY 2401#if EV_VERIFY
1809static void noinline 2402static void noinline ecb_cold
1810verify_watcher (EV_P_ W w) 2403verify_watcher (EV_P_ W w)
1811{ 2404{
1812 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2405 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1813 2406
1814 if (w->pending) 2407 if (w->pending)
1815 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2408 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1816} 2409}
1817 2410
1818static void noinline 2411static void noinline ecb_cold
1819verify_heap (EV_P_ ANHE *heap, int N) 2412verify_heap (EV_P_ ANHE *heap, int N)
1820{ 2413{
1821 int i; 2414 int i;
1822 2415
1823 for (i = HEAP0; i < N + HEAP0; ++i) 2416 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1828 2421
1829 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2422 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1830 } 2423 }
1831} 2424}
1832 2425
1833static void noinline 2426static void noinline ecb_cold
1834array_verify (EV_P_ W *ws, int cnt) 2427array_verify (EV_P_ W *ws, int cnt)
1835{ 2428{
1836 while (cnt--) 2429 while (cnt--)
1837 { 2430 {
1838 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2431 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1839 verify_watcher (EV_A_ ws [cnt]); 2432 verify_watcher (EV_A_ ws [cnt]);
1840 } 2433 }
1841} 2434}
1842#endif 2435#endif
1843 2436
1844#if EV_MINIMAL < 2 2437#if EV_FEATURE_API
1845void 2438void ecb_cold
1846ev_loop_verify (EV_P) 2439ev_verify (EV_P)
1847{ 2440{
1848#if EV_VERIFY 2441#if EV_VERIFY
1849 int i; 2442 int i;
1850 WL w; 2443 WL w;
1851 2444
… …
1885#if EV_FORK_ENABLE 2478#if EV_FORK_ENABLE
1886 assert (forkmax >= forkcnt); 2479 assert (forkmax >= forkcnt);
1887 array_verify (EV_A_ (W *)forks, forkcnt); 2480 array_verify (EV_A_ (W *)forks, forkcnt);
1888#endif 2481#endif
1889 2482
2483#if EV_CLEANUP_ENABLE
2484 assert (cleanupmax >= cleanupcnt);
2485 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2486#endif
2487
1890#if EV_ASYNC_ENABLE 2488#if EV_ASYNC_ENABLE
1891 assert (asyncmax >= asynccnt); 2489 assert (asyncmax >= asynccnt);
1892 array_verify (EV_A_ (W *)asyncs, asynccnt); 2490 array_verify (EV_A_ (W *)asyncs, asynccnt);
1893#endif 2491#endif
1894 2492
2493#if EV_PREPARE_ENABLE
1895 assert (preparemax >= preparecnt); 2494 assert (preparemax >= preparecnt);
1896 array_verify (EV_A_ (W *)prepares, preparecnt); 2495 array_verify (EV_A_ (W *)prepares, preparecnt);
2496#endif
1897 2497
2498#if EV_CHECK_ENABLE
1898 assert (checkmax >= checkcnt); 2499 assert (checkmax >= checkcnt);
1899 array_verify (EV_A_ (W *)checks, checkcnt); 2500 array_verify (EV_A_ (W *)checks, checkcnt);
2501#endif
1900 2502
1901# if 0 2503# if 0
2504#if EV_CHILD_ENABLE
1902 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2505 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) 2506 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2507#endif
1904# endif 2508# endif
1905#endif 2509#endif
1906} 2510}
1907#endif 2511#endif
1908 2512
1909#if EV_MULTIPLICITY 2513#if EV_MULTIPLICITY
1910struct ev_loop * 2514struct ev_loop * ecb_cold
1911ev_default_loop_init (unsigned int flags)
1912#else 2515#else
1913int 2516int
2517#endif
1914ev_default_loop (unsigned int flags) 2518ev_default_loop (unsigned int flags)
1915#endif
1916{ 2519{
1917 if (!ev_default_loop_ptr) 2520 if (!ev_default_loop_ptr)
1918 { 2521 {
1919#if EV_MULTIPLICITY 2522#if EV_MULTIPLICITY
1920 EV_P = ev_default_loop_ptr = &default_loop_struct; 2523 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1924 2527
1925 loop_init (EV_A_ flags); 2528 loop_init (EV_A_ flags);
1926 2529
1927 if (ev_backend (EV_A)) 2530 if (ev_backend (EV_A))
1928 { 2531 {
1929#ifndef _WIN32 2532#if EV_CHILD_ENABLE
1930 ev_signal_init (&childev, childcb, SIGCHLD); 2533 ev_signal_init (&childev, childcb, SIGCHLD);
1931 ev_set_priority (&childev, EV_MAXPRI); 2534 ev_set_priority (&childev, EV_MAXPRI);
1932 ev_signal_start (EV_A_ &childev); 2535 ev_signal_start (EV_A_ &childev);
1933 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2536 ev_unref (EV_A); /* child watcher should not keep loop alive */
1934#endif 2537#endif
… …
1939 2542
1940 return ev_default_loop_ptr; 2543 return ev_default_loop_ptr;
1941} 2544}
1942 2545
1943void 2546void
1944ev_default_destroy (void) 2547ev_loop_fork (EV_P)
1945{ 2548{
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 */ 2549 postfork = 1; /* must be in line with ev_default_fork */
1968} 2550}
1969 2551
1970/*****************************************************************************/ 2552/*****************************************************************************/
1971 2553
1972void 2554void
… …
1994 2576
1995 for (pri = NUMPRI; pri--; ) 2577 for (pri = NUMPRI; pri--; )
1996 while (pendingcnt [pri]) 2578 while (pendingcnt [pri])
1997 { 2579 {
1998 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2580 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 2581
2003 p->w->pending = 0; 2582 p->w->pending = 0;
2004 EV_CB_INVOKE (p->w, p->events); 2583 EV_CB_INVOKE (p->w, p->events);
2005 EV_FREQUENT_CHECK; 2584 EV_FREQUENT_CHECK;
2006 } 2585 }
… …
2063 EV_FREQUENT_CHECK; 2642 EV_FREQUENT_CHECK;
2064 feed_reverse (EV_A_ (W)w); 2643 feed_reverse (EV_A_ (W)w);
2065 } 2644 }
2066 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2645 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2067 2646
2068 feed_reverse_done (EV_A_ EV_TIMEOUT); 2647 feed_reverse_done (EV_A_ EV_TIMER);
2069 } 2648 }
2070} 2649}
2071 2650
2072#if EV_PERIODIC_ENABLE 2651#if EV_PERIODIC_ENABLE
2652
2653static void noinline
2654periodic_recalc (EV_P_ ev_periodic *w)
2655{
2656 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2657 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2658
2659 /* the above almost always errs on the low side */
2660 while (at <= ev_rt_now)
2661 {
2662 ev_tstamp nat = at + w->interval;
2663
2664 /* when resolution fails us, we use ev_rt_now */
2665 if (expect_false (nat == at))
2666 {
2667 at = ev_rt_now;
2668 break;
2669 }
2670
2671 at = nat;
2672 }
2673
2674 ev_at (w) = at;
2675}
2676
2073/* make periodics pending */ 2677/* make periodics pending */
2074inline_size void 2678inline_size void
2075periodics_reify (EV_P) 2679periodics_reify (EV_P)
2076{ 2680{
2077 EV_FREQUENT_CHECK; 2681 EV_FREQUENT_CHECK;
… …
2096 ANHE_at_cache (periodics [HEAP0]); 2700 ANHE_at_cache (periodics [HEAP0]);
2097 downheap (periodics, periodiccnt, HEAP0); 2701 downheap (periodics, periodiccnt, HEAP0);
2098 } 2702 }
2099 else if (w->interval) 2703 else if (w->interval)
2100 { 2704 {
2101 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2705 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]); 2706 ANHE_at_cache (periodics [HEAP0]);
2116 downheap (periodics, periodiccnt, HEAP0); 2707 downheap (periodics, periodiccnt, HEAP0);
2117 } 2708 }
2118 else 2709 else
2119 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2710 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2126 feed_reverse_done (EV_A_ EV_PERIODIC); 2717 feed_reverse_done (EV_A_ EV_PERIODIC);
2127 } 2718 }
2128} 2719}
2129 2720
2130/* simply recalculate all periodics */ 2721/* simply recalculate all periodics */
2131/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2722/* TODO: maybe ensure that at least one event happens when jumping forward? */
2132static void noinline 2723static void noinline ecb_cold
2133periodics_reschedule (EV_P) 2724periodics_reschedule (EV_P)
2134{ 2725{
2135 int i; 2726 int i;
2136 2727
2137 /* adjust periodics after time jump */ 2728 /* adjust periodics after time jump */
… …
2140 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2731 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2141 2732
2142 if (w->reschedule_cb) 2733 if (w->reschedule_cb)
2143 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2734 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2144 else if (w->interval) 2735 else if (w->interval)
2145 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2736 periodic_recalc (EV_A_ w);
2146 2737
2147 ANHE_at_cache (periodics [i]); 2738 ANHE_at_cache (periodics [i]);
2148 } 2739 }
2149 2740
2150 reheap (periodics, periodiccnt); 2741 reheap (periodics, periodiccnt);
2151} 2742}
2152#endif 2743#endif
2153 2744
2154/* adjust all timers by a given offset */ 2745/* adjust all timers by a given offset */
2155static void noinline 2746static void noinline ecb_cold
2156timers_reschedule (EV_P_ ev_tstamp adjust) 2747timers_reschedule (EV_P_ ev_tstamp adjust)
2157{ 2748{
2158 int i; 2749 int i;
2159 2750
2160 for (i = 0; i < timercnt; ++i) 2751 for (i = 0; i < timercnt; ++i)
… …
2197 * doesn't hurt either as we only do this on time-jumps or 2788 * doesn't hurt either as we only do this on time-jumps or
2198 * in the unlikely event of having been preempted here. 2789 * in the unlikely event of having been preempted here.
2199 */ 2790 */
2200 for (i = 4; --i; ) 2791 for (i = 4; --i; )
2201 { 2792 {
2793 ev_tstamp diff;
2202 rtmn_diff = ev_rt_now - mn_now; 2794 rtmn_diff = ev_rt_now - mn_now;
2203 2795
2796 diff = odiff - rtmn_diff;
2797
2204 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2798 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2205 return; /* all is well */ 2799 return; /* all is well */
2206 2800
2207 ev_rt_now = ev_time (); 2801 ev_rt_now = ev_time ();
2208 mn_now = get_clock (); 2802 mn_now = get_clock ();
2209 now_floor = mn_now; 2803 now_floor = mn_now;
… …
2232 mn_now = ev_rt_now; 2826 mn_now = ev_rt_now;
2233 } 2827 }
2234} 2828}
2235 2829
2236void 2830void
2237ev_loop (EV_P_ int flags) 2831ev_run (EV_P_ int flags)
2238{ 2832{
2239#if EV_MINIMAL < 2 2833#if EV_FEATURE_API
2240 ++loop_depth; 2834 ++loop_depth;
2241#endif 2835#endif
2242 2836
2243 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2837 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2244 2838
2245 loop_done = EVUNLOOP_CANCEL; 2839 loop_done = EVBREAK_CANCEL;
2246 2840
2247 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2841 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2248 2842
2249 do 2843 do
2250 { 2844 {
2251#if EV_VERIFY >= 2 2845#if EV_VERIFY >= 2
2252 ev_loop_verify (EV_A); 2846 ev_verify (EV_A);
2253#endif 2847#endif
2254 2848
2255#ifndef _WIN32 2849#ifndef _WIN32
2256 if (expect_false (curpid)) /* penalise the forking check even more */ 2850 if (expect_false (curpid)) /* penalise the forking check even more */
2257 if (expect_false (getpid () != curpid)) 2851 if (expect_false (getpid () != curpid))
… …
2269 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2863 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2270 EV_INVOKE_PENDING; 2864 EV_INVOKE_PENDING;
2271 } 2865 }
2272#endif 2866#endif
2273 2867
2868#if EV_PREPARE_ENABLE
2274 /* queue prepare watchers (and execute them) */ 2869 /* queue prepare watchers (and execute them) */
2275 if (expect_false (preparecnt)) 2870 if (expect_false (preparecnt))
2276 { 2871 {
2277 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2872 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2278 EV_INVOKE_PENDING; 2873 EV_INVOKE_PENDING;
2279 } 2874 }
2875#endif
2280 2876
2281 if (expect_false (loop_done)) 2877 if (expect_false (loop_done))
2282 break; 2878 break;
2283 2879
2284 /* we might have forked, so reify kernel state if necessary */ 2880 /* we might have forked, so reify kernel state if necessary */
… …
2291 /* calculate blocking time */ 2887 /* calculate blocking time */
2292 { 2888 {
2293 ev_tstamp waittime = 0.; 2889 ev_tstamp waittime = 0.;
2294 ev_tstamp sleeptime = 0.; 2890 ev_tstamp sleeptime = 0.;
2295 2891
2892 /* remember old timestamp for io_blocktime calculation */
2893 ev_tstamp prev_mn_now = mn_now;
2894
2895 /* update time to cancel out callback processing overhead */
2896 time_update (EV_A_ 1e100);
2897
2898 /* from now on, we want a pipe-wake-up */
2899 pipe_write_wanted = 1;
2900
2901 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2902
2296 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2903 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2297 { 2904 {
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; 2905 waittime = MAX_BLOCKTIME;
2305 2906
2306 if (timercnt) 2907 if (timercnt)
2307 { 2908 {
2308 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2909 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2309 if (waittime > to) waittime = to; 2910 if (waittime > to) waittime = to;
2310 } 2911 }
2311 2912
2312#if EV_PERIODIC_ENABLE 2913#if EV_PERIODIC_ENABLE
2313 if (periodiccnt) 2914 if (periodiccnt)
2314 { 2915 {
2315 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2916 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2316 if (waittime > to) waittime = to; 2917 if (waittime > to) waittime = to;
2317 } 2918 }
2318#endif 2919#endif
2319 2920
2320 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2921 /* don't let timeouts decrease the waittime below timeout_blocktime */
2321 if (expect_false (waittime < timeout_blocktime)) 2922 if (expect_false (waittime < timeout_blocktime))
2322 waittime = timeout_blocktime; 2923 waittime = timeout_blocktime;
2924
2925 /* at this point, we NEED to wait, so we have to ensure */
2926 /* to pass a minimum nonzero value to the backend */
2927 if (expect_false (waittime < backend_mintime))
2928 waittime = backend_mintime;
2323 2929
2324 /* extra check because io_blocktime is commonly 0 */ 2930 /* extra check because io_blocktime is commonly 0 */
2325 if (expect_false (io_blocktime)) 2931 if (expect_false (io_blocktime))
2326 { 2932 {
2327 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2933 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2328 2934
2329 if (sleeptime > waittime - backend_fudge) 2935 if (sleeptime > waittime - backend_mintime)
2330 sleeptime = waittime - backend_fudge; 2936 sleeptime = waittime - backend_mintime;
2331 2937
2332 if (expect_true (sleeptime > 0.)) 2938 if (expect_true (sleeptime > 0.))
2333 { 2939 {
2334 ev_sleep (sleeptime); 2940 ev_sleep (sleeptime);
2335 waittime -= sleeptime; 2941 waittime -= sleeptime;
2336 } 2942 }
2337 } 2943 }
2338 } 2944 }
2339 2945
2340#if EV_MINIMAL < 2 2946#if EV_FEATURE_API
2341 ++loop_count; 2947 ++loop_count;
2342#endif 2948#endif
2343 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2949 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2344 backend_poll (EV_A_ waittime); 2950 backend_poll (EV_A_ waittime);
2345 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2951 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2952
2953 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2954
2955 if (pipe_write_skipped)
2956 {
2957 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2958 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2959 }
2960
2346 2961
2347 /* update ev_rt_now, do magic */ 2962 /* update ev_rt_now, do magic */
2348 time_update (EV_A_ waittime + sleeptime); 2963 time_update (EV_A_ waittime + sleeptime);
2349 } 2964 }
2350 2965
… …
2357#if EV_IDLE_ENABLE 2972#if EV_IDLE_ENABLE
2358 /* queue idle watchers unless other events are pending */ 2973 /* queue idle watchers unless other events are pending */
2359 idle_reify (EV_A); 2974 idle_reify (EV_A);
2360#endif 2975#endif
2361 2976
2977#if EV_CHECK_ENABLE
2362 /* queue check watchers, to be executed first */ 2978 /* queue check watchers, to be executed first */
2363 if (expect_false (checkcnt)) 2979 if (expect_false (checkcnt))
2364 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2980 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2981#endif
2365 2982
2366 EV_INVOKE_PENDING; 2983 EV_INVOKE_PENDING;
2367 } 2984 }
2368 while (expect_true ( 2985 while (expect_true (
2369 activecnt 2986 activecnt
2370 && !loop_done 2987 && !loop_done
2371 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2988 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2372 )); 2989 ));
2373 2990
2374 if (loop_done == EVUNLOOP_ONE) 2991 if (loop_done == EVBREAK_ONE)
2375 loop_done = EVUNLOOP_CANCEL; 2992 loop_done = EVBREAK_CANCEL;
2376 2993
2377#if EV_MINIMAL < 2 2994#if EV_FEATURE_API
2378 --loop_depth; 2995 --loop_depth;
2379#endif 2996#endif
2380} 2997}
2381 2998
2382void 2999void
2383ev_unloop (EV_P_ int how) 3000ev_break (EV_P_ int how)
2384{ 3001{
2385 loop_done = how; 3002 loop_done = how;
2386} 3003}
2387 3004
2388void 3005void
… …
2508 3125
2509 if (expect_false (ev_is_active (w))) 3126 if (expect_false (ev_is_active (w)))
2510 return; 3127 return;
2511 3128
2512 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 3129 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2513 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3130 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2514 3131
2515 EV_FREQUENT_CHECK; 3132 EV_FREQUENT_CHECK;
2516 3133
2517 ev_start (EV_A_ (W)w, 1); 3134 ev_start (EV_A_ (W)w, 1);
2518 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3135 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
… …
2536 EV_FREQUENT_CHECK; 3153 EV_FREQUENT_CHECK;
2537 3154
2538 wlist_del (&anfds[w->fd].head, (WL)w); 3155 wlist_del (&anfds[w->fd].head, (WL)w);
2539 ev_stop (EV_A_ (W)w); 3156 ev_stop (EV_A_ (W)w);
2540 3157
2541 fd_change (EV_A_ w->fd, 1); 3158 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2542 3159
2543 EV_FREQUENT_CHECK; 3160 EV_FREQUENT_CHECK;
2544} 3161}
2545 3162
2546void noinline 3163void noinline
… …
2588 timers [active] = timers [timercnt + HEAP0]; 3205 timers [active] = timers [timercnt + HEAP0];
2589 adjustheap (timers, timercnt, active); 3206 adjustheap (timers, timercnt, active);
2590 } 3207 }
2591 } 3208 }
2592 3209
2593 EV_FREQUENT_CHECK;
2594
2595 ev_at (w) -= mn_now; 3210 ev_at (w) -= mn_now;
2596 3211
2597 ev_stop (EV_A_ (W)w); 3212 ev_stop (EV_A_ (W)w);
3213
3214 EV_FREQUENT_CHECK;
2598} 3215}
2599 3216
2600void noinline 3217void noinline
2601ev_timer_again (EV_P_ ev_timer *w) 3218ev_timer_again (EV_P_ ev_timer *w)
2602{ 3219{
… …
2638 if (w->reschedule_cb) 3255 if (w->reschedule_cb)
2639 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3256 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2640 else if (w->interval) 3257 else if (w->interval)
2641 { 3258 {
2642 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3259 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 */ 3260 periodic_recalc (EV_A_ w);
2644 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2645 } 3261 }
2646 else 3262 else
2647 ev_at (w) = w->offset; 3263 ev_at (w) = w->offset;
2648 3264
2649 EV_FREQUENT_CHECK; 3265 EV_FREQUENT_CHECK;
… …
2681 periodics [active] = periodics [periodiccnt + HEAP0]; 3297 periodics [active] = periodics [periodiccnt + HEAP0];
2682 adjustheap (periodics, periodiccnt, active); 3298 adjustheap (periodics, periodiccnt, active);
2683 } 3299 }
2684 } 3300 }
2685 3301
2686 EV_FREQUENT_CHECK;
2687
2688 ev_stop (EV_A_ (W)w); 3302 ev_stop (EV_A_ (W)w);
3303
3304 EV_FREQUENT_CHECK;
2689} 3305}
2690 3306
2691void noinline 3307void noinline
2692ev_periodic_again (EV_P_ ev_periodic *w) 3308ev_periodic_again (EV_P_ ev_periodic *w)
2693{ 3309{
… …
2698#endif 3314#endif
2699 3315
2700#ifndef SA_RESTART 3316#ifndef SA_RESTART
2701# define SA_RESTART 0 3317# define SA_RESTART 0
2702#endif 3318#endif
3319
3320#if EV_SIGNAL_ENABLE
2703 3321
2704void noinline 3322void noinline
2705ev_signal_start (EV_P_ ev_signal *w) 3323ev_signal_start (EV_P_ ev_signal *w)
2706{ 3324{
2707 if (expect_false (ev_is_active (w))) 3325 if (expect_false (ev_is_active (w)))
… …
2768 sa.sa_handler = ev_sighandler; 3386 sa.sa_handler = ev_sighandler;
2769 sigfillset (&sa.sa_mask); 3387 sigfillset (&sa.sa_mask);
2770 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3388 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2771 sigaction (w->signum, &sa, 0); 3389 sigaction (w->signum, &sa, 0);
2772 3390
3391 if (origflags & EVFLAG_NOSIGMASK)
3392 {
2773 sigemptyset (&sa.sa_mask); 3393 sigemptyset (&sa.sa_mask);
2774 sigaddset (&sa.sa_mask, w->signum); 3394 sigaddset (&sa.sa_mask, w->signum);
2775 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3395 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3396 }
2776#endif 3397#endif
2777 } 3398 }
2778 3399
2779 EV_FREQUENT_CHECK; 3400 EV_FREQUENT_CHECK;
2780} 3401}
… …
2814 } 3435 }
2815 3436
2816 EV_FREQUENT_CHECK; 3437 EV_FREQUENT_CHECK;
2817} 3438}
2818 3439
3440#endif
3441
3442#if EV_CHILD_ENABLE
3443
2819void 3444void
2820ev_child_start (EV_P_ ev_child *w) 3445ev_child_start (EV_P_ ev_child *w)
2821{ 3446{
2822#if EV_MULTIPLICITY 3447#if EV_MULTIPLICITY
2823 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3448 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
… …
2826 return; 3451 return;
2827 3452
2828 EV_FREQUENT_CHECK; 3453 EV_FREQUENT_CHECK;
2829 3454
2830 ev_start (EV_A_ (W)w, 1); 3455 ev_start (EV_A_ (W)w, 1);
2831 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3456 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2832 3457
2833 EV_FREQUENT_CHECK; 3458 EV_FREQUENT_CHECK;
2834} 3459}
2835 3460
2836void 3461void
… …
2840 if (expect_false (!ev_is_active (w))) 3465 if (expect_false (!ev_is_active (w)))
2841 return; 3466 return;
2842 3467
2843 EV_FREQUENT_CHECK; 3468 EV_FREQUENT_CHECK;
2844 3469
2845 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3470 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2846 ev_stop (EV_A_ (W)w); 3471 ev_stop (EV_A_ (W)w);
2847 3472
2848 EV_FREQUENT_CHECK; 3473 EV_FREQUENT_CHECK;
2849} 3474}
3475
3476#endif
2850 3477
2851#if EV_STAT_ENABLE 3478#if EV_STAT_ENABLE
2852 3479
2853# ifdef _WIN32 3480# ifdef _WIN32
2854# undef lstat 3481# undef lstat
… …
2915 if (!pend || pend == path) 3542 if (!pend || pend == path)
2916 break; 3543 break;
2917 3544
2918 *pend = 0; 3545 *pend = 0;
2919 w->wd = inotify_add_watch (fs_fd, path, mask); 3546 w->wd = inotify_add_watch (fs_fd, path, mask);
2920 } 3547 }
2921 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3548 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2922 } 3549 }
2923 } 3550 }
2924 3551
2925 if (w->wd >= 0) 3552 if (w->wd >= 0)
2926 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3553 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2927 3554
2928 /* now re-arm timer, if required */ 3555 /* now re-arm timer, if required */
2929 if (ev_is_active (&w->timer)) ev_ref (EV_A); 3556 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2930 ev_timer_again (EV_A_ &w->timer); 3557 ev_timer_again (EV_A_ &w->timer);
2931 if (ev_is_active (&w->timer)) ev_unref (EV_A); 3558 if (ev_is_active (&w->timer)) ev_unref (EV_A);
… …
2939 3566
2940 if (wd < 0) 3567 if (wd < 0)
2941 return; 3568 return;
2942 3569
2943 w->wd = -2; 3570 w->wd = -2;
2944 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3571 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2945 wlist_del (&fs_hash [slot].head, (WL)w); 3572 wlist_del (&fs_hash [slot].head, (WL)w);
2946 3573
2947 /* remove this watcher, if others are watching it, they will rearm */ 3574 /* remove this watcher, if others are watching it, they will rearm */
2948 inotify_rm_watch (fs_fd, wd); 3575 inotify_rm_watch (fs_fd, wd);
2949} 3576}
… …
2951static void noinline 3578static void noinline
2952infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3579infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2953{ 3580{
2954 if (slot < 0) 3581 if (slot < 0)
2955 /* overflow, need to check for all hash slots */ 3582 /* overflow, need to check for all hash slots */
2956 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3583 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2957 infy_wd (EV_A_ slot, wd, ev); 3584 infy_wd (EV_A_ slot, wd, ev);
2958 else 3585 else
2959 { 3586 {
2960 WL w_; 3587 WL w_;
2961 3588
2962 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3589 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2963 { 3590 {
2964 ev_stat *w = (ev_stat *)w_; 3591 ev_stat *w = (ev_stat *)w_;
2965 w_ = w_->next; /* lets us remove this watcher and all before it */ 3592 w_ = w_->next; /* lets us remove this watcher and all before it */
2966 3593
2967 if (w->wd == wd || wd == -1) 3594 if (w->wd == wd || wd == -1)
2968 { 3595 {
2969 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3596 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2970 { 3597 {
2971 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3598 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2972 w->wd = -1; 3599 w->wd = -1;
2973 infy_add (EV_A_ w); /* re-add, no matter what */ 3600 infy_add (EV_A_ w); /* re-add, no matter what */
2974 } 3601 }
2975 3602
2976 stat_timer_cb (EV_A_ &w->timer, 0); 3603 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2992 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3619 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2993 ofs += sizeof (struct inotify_event) + ev->len; 3620 ofs += sizeof (struct inotify_event) + ev->len;
2994 } 3621 }
2995} 3622}
2996 3623
2997inline_size void 3624inline_size void ecb_cold
2998check_2625 (EV_P) 3625ev_check_2625 (EV_P)
2999{ 3626{
3000 /* kernels < 2.6.25 are borked 3627 /* kernels < 2.6.25 are borked
3001 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3628 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3002 */ 3629 */
3003 struct utsname buf; 3630 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; 3631 return;
3016 3632
3017 fs_2625 = 1; 3633 fs_2625 = 1;
3018} 3634}
3019 3635
… …
3034 if (fs_fd != -2) 3650 if (fs_fd != -2)
3035 return; 3651 return;
3036 3652
3037 fs_fd = -1; 3653 fs_fd = -1;
3038 3654
3039 check_2625 (EV_A); 3655 ev_check_2625 (EV_A);
3040 3656
3041 fs_fd = infy_newfd (); 3657 fs_fd = infy_newfd ();
3042 3658
3043 if (fs_fd >= 0) 3659 if (fs_fd >= 0)
3044 { 3660 {
… …
3069 ev_io_set (&fs_w, fs_fd, EV_READ); 3685 ev_io_set (&fs_w, fs_fd, EV_READ);
3070 ev_io_start (EV_A_ &fs_w); 3686 ev_io_start (EV_A_ &fs_w);
3071 ev_unref (EV_A); 3687 ev_unref (EV_A);
3072 } 3688 }
3073 3689
3074 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3690 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3075 { 3691 {
3076 WL w_ = fs_hash [slot].head; 3692 WL w_ = fs_hash [slot].head;
3077 fs_hash [slot].head = 0; 3693 fs_hash [slot].head = 0;
3078 3694
3079 while (w_) 3695 while (w_)
… …
3254 3870
3255 EV_FREQUENT_CHECK; 3871 EV_FREQUENT_CHECK;
3256} 3872}
3257#endif 3873#endif
3258 3874
3875#if EV_PREPARE_ENABLE
3259void 3876void
3260ev_prepare_start (EV_P_ ev_prepare *w) 3877ev_prepare_start (EV_P_ ev_prepare *w)
3261{ 3878{
3262 if (expect_false (ev_is_active (w))) 3879 if (expect_false (ev_is_active (w)))
3263 return; 3880 return;
… …
3289 3906
3290 ev_stop (EV_A_ (W)w); 3907 ev_stop (EV_A_ (W)w);
3291 3908
3292 EV_FREQUENT_CHECK; 3909 EV_FREQUENT_CHECK;
3293} 3910}
3911#endif
3294 3912
3913#if EV_CHECK_ENABLE
3295void 3914void
3296ev_check_start (EV_P_ ev_check *w) 3915ev_check_start (EV_P_ ev_check *w)
3297{ 3916{
3298 if (expect_false (ev_is_active (w))) 3917 if (expect_false (ev_is_active (w)))
3299 return; 3918 return;
… …
3325 3944
3326 ev_stop (EV_A_ (W)w); 3945 ev_stop (EV_A_ (W)w);
3327 3946
3328 EV_FREQUENT_CHECK; 3947 EV_FREQUENT_CHECK;
3329} 3948}
3949#endif
3330 3950
3331#if EV_EMBED_ENABLE 3951#if EV_EMBED_ENABLE
3332void noinline 3952void noinline
3333ev_embed_sweep (EV_P_ ev_embed *w) 3953ev_embed_sweep (EV_P_ ev_embed *w)
3334{ 3954{
3335 ev_loop (w->other, EVLOOP_NONBLOCK); 3955 ev_run (w->other, EVRUN_NOWAIT);
3336} 3956}
3337 3957
3338static void 3958static void
3339embed_io_cb (EV_P_ ev_io *io, int revents) 3959embed_io_cb (EV_P_ ev_io *io, int revents)
3340{ 3960{
3341 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3961 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3342 3962
3343 if (ev_cb (w)) 3963 if (ev_cb (w))
3344 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3964 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3345 else 3965 else
3346 ev_loop (w->other, EVLOOP_NONBLOCK); 3966 ev_run (w->other, EVRUN_NOWAIT);
3347} 3967}
3348 3968
3349static void 3969static void
3350embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3970embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3351{ 3971{
… …
3355 EV_P = w->other; 3975 EV_P = w->other;
3356 3976
3357 while (fdchangecnt) 3977 while (fdchangecnt)
3358 { 3978 {
3359 fd_reify (EV_A); 3979 fd_reify (EV_A);
3360 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3980 ev_run (EV_A_ EVRUN_NOWAIT);
3361 } 3981 }
3362 } 3982 }
3363} 3983}
3364 3984
3365static void 3985static void
… …
3371 3991
3372 { 3992 {
3373 EV_P = w->other; 3993 EV_P = w->other;
3374 3994
3375 ev_loop_fork (EV_A); 3995 ev_loop_fork (EV_A);
3376 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3996 ev_run (EV_A_ EVRUN_NOWAIT);
3377 } 3997 }
3378 3998
3379 ev_embed_start (EV_A_ w); 3999 ev_embed_start (EV_A_ w);
3380} 4000}
3381 4001
… …
3429 4049
3430 ev_io_stop (EV_A_ &w->io); 4050 ev_io_stop (EV_A_ &w->io);
3431 ev_prepare_stop (EV_A_ &w->prepare); 4051 ev_prepare_stop (EV_A_ &w->prepare);
3432 ev_fork_stop (EV_A_ &w->fork); 4052 ev_fork_stop (EV_A_ &w->fork);
3433 4053
4054 ev_stop (EV_A_ (W)w);
4055
3434 EV_FREQUENT_CHECK; 4056 EV_FREQUENT_CHECK;
3435} 4057}
3436#endif 4058#endif
3437 4059
3438#if EV_FORK_ENABLE 4060#if EV_FORK_ENABLE
… …
3471 4093
3472 EV_FREQUENT_CHECK; 4094 EV_FREQUENT_CHECK;
3473} 4095}
3474#endif 4096#endif
3475 4097
4098#if EV_CLEANUP_ENABLE
4099void
4100ev_cleanup_start (EV_P_ ev_cleanup *w)
4101{
4102 if (expect_false (ev_is_active (w)))
4103 return;
4104
4105 EV_FREQUENT_CHECK;
4106
4107 ev_start (EV_A_ (W)w, ++cleanupcnt);
4108 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4109 cleanups [cleanupcnt - 1] = w;
4110
4111 /* cleanup watchers should never keep a refcount on the loop */
4112 ev_unref (EV_A);
4113 EV_FREQUENT_CHECK;
4114}
4115
4116void
4117ev_cleanup_stop (EV_P_ ev_cleanup *w)
4118{
4119 clear_pending (EV_A_ (W)w);
4120 if (expect_false (!ev_is_active (w)))
4121 return;
4122
4123 EV_FREQUENT_CHECK;
4124 ev_ref (EV_A);
4125
4126 {
4127 int active = ev_active (w);
4128
4129 cleanups [active - 1] = cleanups [--cleanupcnt];
4130 ev_active (cleanups [active - 1]) = active;
4131 }
4132
4133 ev_stop (EV_A_ (W)w);
4134
4135 EV_FREQUENT_CHECK;
4136}
4137#endif
4138
3476#if EV_ASYNC_ENABLE 4139#if EV_ASYNC_ENABLE
3477void 4140void
3478ev_async_start (EV_P_ ev_async *w) 4141ev_async_start (EV_P_ ev_async *w)
3479{ 4142{
3480 if (expect_false (ev_is_active (w))) 4143 if (expect_false (ev_is_active (w)))
3481 return; 4144 return;
4145
4146 w->sent = 0;
3482 4147
3483 evpipe_init (EV_A); 4148 evpipe_init (EV_A);
3484 4149
3485 EV_FREQUENT_CHECK; 4150 EV_FREQUENT_CHECK;
3486 4151
… …
3564{ 4229{
3565 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4230 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3566 4231
3567 if (expect_false (!once)) 4232 if (expect_false (!once))
3568 { 4233 {
3569 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4234 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3570 return; 4235 return;
3571 } 4236 }
3572 4237
3573 once->cb = cb; 4238 once->cb = cb;
3574 once->arg = arg; 4239 once->arg = arg;
… …
3589} 4254}
3590 4255
3591/*****************************************************************************/ 4256/*****************************************************************************/
3592 4257
3593#if EV_WALK_ENABLE 4258#if EV_WALK_ENABLE
3594void 4259void ecb_cold
3595ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4260ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3596{ 4261{
3597 int i, j; 4262 int i, j;
3598 ev_watcher_list *wl, *wn; 4263 ev_watcher_list *wl, *wn;
3599 4264
… …
3643 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4308 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3644#endif 4309#endif
3645 4310
3646#if EV_IDLE_ENABLE 4311#if EV_IDLE_ENABLE
3647 if (types & EV_IDLE) 4312 if (types & EV_IDLE)
3648 for (j = NUMPRI; i--; ) 4313 for (j = NUMPRI; j--; )
3649 for (i = idlecnt [j]; i--; ) 4314 for (i = idlecnt [j]; i--; )
3650 cb (EV_A_ EV_IDLE, idles [j][i]); 4315 cb (EV_A_ EV_IDLE, idles [j][i]);
3651#endif 4316#endif
3652 4317
3653#if EV_FORK_ENABLE 4318#if EV_FORK_ENABLE
… …
3661 if (types & EV_ASYNC) 4326 if (types & EV_ASYNC)
3662 for (i = asynccnt; i--; ) 4327 for (i = asynccnt; i--; )
3663 cb (EV_A_ EV_ASYNC, asyncs [i]); 4328 cb (EV_A_ EV_ASYNC, asyncs [i]);
3664#endif 4329#endif
3665 4330
4331#if EV_PREPARE_ENABLE
3666 if (types & EV_PREPARE) 4332 if (types & EV_PREPARE)
3667 for (i = preparecnt; i--; ) 4333 for (i = preparecnt; i--; )
3668#if EV_EMBED_ENABLE 4334# if EV_EMBED_ENABLE
3669 if (ev_cb (prepares [i]) != embed_prepare_cb) 4335 if (ev_cb (prepares [i]) != embed_prepare_cb)
3670#endif 4336# endif
3671 cb (EV_A_ EV_PREPARE, prepares [i]); 4337 cb (EV_A_ EV_PREPARE, prepares [i]);
4338#endif
3672 4339
4340#if EV_CHECK_ENABLE
3673 if (types & EV_CHECK) 4341 if (types & EV_CHECK)
3674 for (i = checkcnt; i--; ) 4342 for (i = checkcnt; i--; )
3675 cb (EV_A_ EV_CHECK, checks [i]); 4343 cb (EV_A_ EV_CHECK, checks [i]);
4344#endif
3676 4345
4346#if EV_SIGNAL_ENABLE
3677 if (types & EV_SIGNAL) 4347 if (types & EV_SIGNAL)
3678 for (i = 0; i < EV_NSIG - 1; ++i) 4348 for (i = 0; i < EV_NSIG - 1; ++i)
3679 for (wl = signals [i].head; wl; ) 4349 for (wl = signals [i].head; wl; )
3680 { 4350 {
3681 wn = wl->next; 4351 wn = wl->next;
3682 cb (EV_A_ EV_SIGNAL, wl); 4352 cb (EV_A_ EV_SIGNAL, wl);
3683 wl = wn; 4353 wl = wn;
3684 } 4354 }
4355#endif
3685 4356
4357#if EV_CHILD_ENABLE
3686 if (types & EV_CHILD) 4358 if (types & EV_CHILD)
3687 for (i = EV_PID_HASHSIZE; i--; ) 4359 for (i = (EV_PID_HASHSIZE); i--; )
3688 for (wl = childs [i]; wl; ) 4360 for (wl = childs [i]; wl; )
3689 { 4361 {
3690 wn = wl->next; 4362 wn = wl->next;
3691 cb (EV_A_ EV_CHILD, wl); 4363 cb (EV_A_ EV_CHILD, wl);
3692 wl = wn; 4364 wl = wn;
3693 } 4365 }
4366#endif
3694/* EV_STAT 0x00001000 /* stat data changed */ 4367/* EV_STAT 0x00001000 /* stat data changed */
3695/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4368/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3696} 4369}
3697#endif 4370#endif
3698 4371
3699#if EV_MULTIPLICITY 4372#if EV_MULTIPLICITY
3700 #include "ev_wrap.h" 4373 #include "ev_wrap.h"
3701#endif 4374#endif
3702 4375
3703#ifdef __cplusplus 4376EV_CPP(})
3704}
3705#endif
3706 4377

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