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Comparing libev/ev.c (file contents):
Revision 1.333 by root, Tue Mar 9 08:58:22 2010 UTC vs.
Revision 1.398 by root, Sun Sep 25 21:27:35 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>
… …
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
189# undef EV_AVOID_STDIO 201# undef EV_AVOID_STDIO
190#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
191 211
192/* 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 */
193 213
194/* try to deduce the maximum number of signals on this platform */ 214/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 215#if defined (EV_NSIG)
… …
207#elif defined (MAXSIG) 227#elif defined (MAXSIG)
208# define EV_NSIG (MAXSIG+1) 228# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG) 229#elif defined (MAX_SIG)
210# define EV_NSIG (MAX_SIG+1) 230# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE) 231#elif defined (SIGARRAYSIZE)
212# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig) 233#elif defined (_sys_nsig)
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else 235#else
216# error "unable to find value for NSIG, please report" 236# error "unable to find value for NSIG, please report"
217/* 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! :) */
218# define EV_NSIG 65 239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
219#endif 244#endif
220 245
221#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
222# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
223# define EV_USE_CLOCK_SYSCALL 1 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
224# else 249# else
225# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
226# endif 251# endif
227#endif 252#endif
228 253
229#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
230# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
231# define EV_USE_MONOTONIC 1 256# define EV_USE_MONOTONIC EV_FEATURE_OS
232# else 257# else
233# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
234# endif 259# endif
235#endif 260#endif
236 261
… …
238# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
239#endif 264#endif
240 265
241#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
242# if _POSIX_C_SOURCE >= 199309L 267# if _POSIX_C_SOURCE >= 199309L
243# define EV_USE_NANOSLEEP 1 268# define EV_USE_NANOSLEEP EV_FEATURE_OS
244# else 269# else
245# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
246# endif 271# endif
247#endif 272#endif
248 273
249#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
250# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
251#endif 276#endif
252 277
253#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
254# ifdef _WIN32 279# ifdef _WIN32
255# define EV_USE_POLL 0 280# define EV_USE_POLL 0
256# else 281# else
257# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
258# endif 283# endif
259#endif 284#endif
260 285
261#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
263# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
264# else 289# else
265# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
266# endif 291# endif
267#endif 292#endif
268 293
… …
274# define EV_USE_PORT 0 299# define EV_USE_PORT 0
275#endif 300#endif
276 301
277#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
280# else 305# else
281# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
282# endif 307# endif
283#endif 308#endif
284 309
285#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
286# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
287# define EV_PID_HASHSIZE 1
288# else
289# define EV_PID_HASHSIZE 16
290# endif
291#endif 312#endif
292 313
293#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
294# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
295# define EV_INOTIFY_HASHSIZE 1
296# else
297# define EV_INOTIFY_HASHSIZE 16
298# endif
299#endif 316#endif
300 317
301#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
302# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
303# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
304# else 321# else
305# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
306# endif 323# endif
307#endif 324#endif
308 325
309#ifndef EV_USE_SIGNALFD 326#ifndef EV_USE_SIGNALFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_SIGNALFD 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
312# else 329# else
313# define EV_USE_SIGNALFD 0 330# define EV_USE_SIGNALFD 0
314# endif 331# endif
315#endif 332#endif
316 333
… …
319# define EV_USE_4HEAP 1 336# define EV_USE_4HEAP 1
320# define EV_HEAP_CACHE_AT 1 337# define EV_HEAP_CACHE_AT 1
321#endif 338#endif
322 339
323#ifndef EV_VERIFY 340#ifndef EV_VERIFY
324# define EV_VERIFY !EV_MINIMAL 341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
325#endif 342#endif
326 343
327#ifndef EV_USE_4HEAP 344#ifndef EV_USE_4HEAP
328# define EV_USE_4HEAP !EV_MINIMAL 345# define EV_USE_4HEAP EV_FEATURE_DATA
329#endif 346#endif
330 347
331#ifndef EV_HEAP_CACHE_AT 348#ifndef EV_HEAP_CACHE_AT
332# define EV_HEAP_CACHE_AT !EV_MINIMAL 349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
333#endif 350#endif
334 351
335/* 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, */
336/* which makes programs even slower. might work on other unices, too. */ 353/* which makes programs even slower. might work on other unices, too. */
337#if EV_USE_CLOCK_SYSCALL 354#if EV_USE_CLOCK_SYSCALL
… …
368# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
369# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
370#endif 387#endif
371 388
372#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
373# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
374# include <sys/select.h> 392# include <sys/select.h>
375# endif 393# endif
376#endif 394#endif
377 395
378#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
379# include <sys/utsname.h>
380# include <sys/statfs.h> 397# include <sys/statfs.h>
381# include <sys/inotify.h> 398# include <sys/inotify.h>
382/* 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 */
383# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
384# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
401# define EFD_CLOEXEC O_CLOEXEC 418# define EFD_CLOEXEC O_CLOEXEC
402# else 419# else
403# define EFD_CLOEXEC 02000000 420# define EFD_CLOEXEC 02000000
404# endif 421# endif
405# endif 422# endif
406# ifdef __cplusplus
407extern "C" {
408# endif
409int (eventfd) (unsigned int initval, int flags); 423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
410# ifdef __cplusplus
411}
412# endif
413#endif 424#endif
414 425
415#if EV_USE_SIGNALFD 426#if EV_USE_SIGNALFD
416/* 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 */
417# include <stdint.h> 428# include <stdint.h>
… …
423# define SFD_CLOEXEC O_CLOEXEC 434# define SFD_CLOEXEC O_CLOEXEC
424# else 435# else
425# define SFD_CLOEXEC 02000000 436# define SFD_CLOEXEC 02000000
426# endif 437# endif
427# endif 438# endif
428# ifdef __cplusplus
429extern "C" {
430# endif
431int signalfd (int fd, const sigset_t *mask, int flags); 439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
432 440
433struct signalfd_siginfo 441struct signalfd_siginfo
434{ 442{
435 uint32_t ssi_signo; 443 uint32_t ssi_signo;
436 char pad[128 - sizeof (uint32_t)]; 444 char pad[128 - sizeof (uint32_t)];
437}; 445};
438# ifdef __cplusplus
439}
440# endif 446#endif
441#endif
442
443 447
444/**/ 448/**/
445 449
446#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
447# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
448#else 452#else
449# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
450#endif 454#endif
451 455
452/* 456/*
453 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
454 * It is added to ev_rt_now when scheduling periodics
455 * to ensure progress, time-wise, even when rounding
456 * errors are against us.
457 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
458 * Better solutions welcome.
459 */ 459 */
460#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 */
461 462
462#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) */
463#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) */
464 465
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;
465#if __GNUC__ >= 4 510 #if __GNUC__
466# define expect(expr,value) __builtin_expect ((expr),(value)) 511 typedef signed long long int64_t;
467# 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
468#else 517#else
469# define expect(expr,value) (expr) 518 #include <inttypes.h>
470# define noinline
471# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
472# define inline
473# 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)))
474#endif 533 #endif
534#endif
475 535
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#endif
544
545#ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__)
547 #if __i386__
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
551 #elif __amd64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
563 #endif
564 #endif
565#endif
566
567#ifndef ECB_MEMORY_FENCE
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
569 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32)
578 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
580 #endif
581#endif
582
583#ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS
585 /*
586 * if you get undefined symbol references to pthread_mutex_lock,
587 * or failure to find pthread.h, then you should implement
588 * the ECB_MEMORY_FENCE operations for your cpu/compiler
589 * OR provide pthread.h and link against the posix thread library
590 * of your system.
591 */
592 #include <pthread.h>
593 #define ECB_NEEDS_PTHREADS 1
594 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
595
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif
599#endif
600
601#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603#endif
604
605#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607#endif
608
609/*****************************************************************************/
610
611#define ECB_C99 (__STDC_VERSION__ >= 199901L)
612
613#if __cplusplus
614 #define ecb_inline static inline
615#elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__
617#elif ECB_C99
618 #define ecb_inline static inline
619#else
620 #define ecb_inline static
621#endif
622
623#if ECB_GCC_VERSION(3,3)
624 #define ecb_restrict __restrict__
625#elif ECB_C99
626 #define ecb_restrict restrict
627#else
628 #define ecb_restrict
629#endif
630
631typedef int ecb_bool;
632
633#define ECB_CONCAT_(a, b) a ## b
634#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635#define ECB_STRINGIFY_(a) # a
636#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
637
638#define ecb_function_ ecb_inline
639
640#if ECB_GCC_VERSION(3,1)
641 #define ecb_attribute(attrlist) __attribute__(attrlist)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645#else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
648 #define ecb_expect(expr,value) (expr)
649 #define ecb_prefetch(addr,rw,locality)
650#endif
651
652/* no emulation for ecb_decltype */
653#if ECB_GCC_VERSION(4,5)
654 #define ecb_decltype(x) __decltype(x)
655#elif ECB_GCC_VERSION(3,0)
656 #define ecb_decltype(x) __typeof(x)
657#endif
658
659#define ecb_noinline ecb_attribute ((__noinline__))
660#define ecb_noreturn ecb_attribute ((__noreturn__))
661#define ecb_unused ecb_attribute ((__unused__))
662#define ecb_const ecb_attribute ((__const__))
663#define ecb_pure ecb_attribute ((__pure__))
664
665#if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__))
669#else
670 #define ecb_artificial
671 #define ecb_hot
672 #define ecb_cold
673#endif
674
675/* put around conditional expressions if you are very sure that the */
676/* expression is mostly true or mostly false. note that these return */
677/* booleans, not the expression. */
476#define expect_false(expr) expect ((expr) != 0, 0) 678#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
477#define expect_true(expr) expect ((expr) != 0, 1) 679#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
680/* for compatibility to the rest of the world */
681#define ecb_likely(expr) ecb_expect_true (expr)
682#define ecb_unlikely(expr) ecb_expect_false (expr)
683
684/* count trailing zero bits and count # of one bits */
685#if ECB_GCC_VERSION(3,4)
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */
693#else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
695 ecb_function_ int
696 ecb_ctz32 (uint32_t x)
697 {
698 int r = 0;
699
700 x &= ~x + 1; /* this isolates the lowest bit */
701
702#if ECB_branchless_on_i386
703 r += !!(x & 0xaaaaaaaa) << 0;
704 r += !!(x & 0xcccccccc) << 1;
705 r += !!(x & 0xf0f0f0f0) << 2;
706 r += !!(x & 0xff00ff00) << 3;
707 r += !!(x & 0xffff0000) << 4;
708#else
709 if (x & 0xaaaaaaaa) r += 1;
710 if (x & 0xcccccccc) r += 2;
711 if (x & 0xf0f0f0f0) r += 4;
712 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16;
714#endif
715
716 return r;
717 }
718
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
720 ecb_function_ int
721 ecb_ctz64 (uint64_t x)
722 {
723 int shift = x & 0xffffffffU ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift;
725 }
726
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
728 ecb_function_ int
729 ecb_popcount32 (uint32_t x)
730 {
731 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101;
735
736 return x >> 24;
737 }
738
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
740 ecb_function_ int ecb_ld32 (uint32_t x)
741 {
742 int r = 0;
743
744 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; }
749
750 return r;
751 }
752
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
754 ecb_function_ int ecb_ld64 (uint64_t x)
755 {
756 int r = 0;
757
758 if (x >> 32) { x >>= 32; r += 32; }
759
760 return r + ecb_ld32 (x);
761 }
762#endif
763
764/* popcount64 is only available on 64 bit cpus as gcc builtin */
765/* so for this version we are lazy */
766ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
767ecb_function_ int
768ecb_popcount64 (uint64_t x)
769{
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771}
772
773ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
774ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
775ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
776ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
777ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
778ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
779ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
780ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
781
782ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790
791#if ECB_GCC_VERSION(4,3)
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
793 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x)
795#else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
797 ecb_function_ uint16_t
798 ecb_bswap16 (uint16_t x)
799 {
800 return ecb_rotl16 (x, 8);
801 }
802
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
804 ecb_function_ uint32_t
805 ecb_bswap32 (uint32_t x)
806 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 }
809
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
811 ecb_function_ uint64_t
812 ecb_bswap64 (uint64_t x)
813 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 }
816#endif
817
818#if ECB_GCC_VERSION(4,5)
819 #define ecb_unreachable() __builtin_unreachable ()
820#else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
823 ecb_function_ void ecb_unreachable (void) { }
824#endif
825
826/* try to tell the compiler that some condition is definitely true */
827#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
828
829ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
830ecb_function_ unsigned char
831ecb_byteorder_helper (void)
832{
833 const uint32_t u = 0x11223344;
834 return *(unsigned char *)&u;
835}
836
837ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
839ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
840ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
841
842#if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844#else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
846#endif
847
848#if __cplusplus
849 template<typename T>
850 static inline T ecb_div_rd (T val, T div)
851 {
852 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
853 }
854 template<typename T>
855 static inline T ecb_div_ru (T val, T div)
856 {
857 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
858 }
859#else
860 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
861 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
862#endif
863
864#if ecb_cplusplus_does_not_suck
865 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
866 template<typename T, int N>
867 static inline int ecb_array_length (const T (&arr)[N])
868 {
869 return N;
870 }
871#else
872 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
873#endif
874
875#endif
876
877/* ECB.H END */
878
879#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
880/* if your architecture doesn't need memory fences, e.g. because it is
881 * single-cpu/core, or if you use libev in a project that doesn't use libev
882 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
883 * libev, in which casess the memory fences become nops.
884 * alternatively, you can remove this #error and link against libpthread,
885 * which will then provide the memory fences.
886 */
887# error "memory fences not defined for your architecture, please report"
888#endif
889
890#ifndef ECB_MEMORY_FENCE
891# define ECB_MEMORY_FENCE do { } while (0)
892# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
893# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
894#endif
895
896#define expect_false(cond) ecb_expect_false (cond)
897#define expect_true(cond) ecb_expect_true (cond)
898#define noinline ecb_noinline
899
478#define inline_size static inline 900#define inline_size ecb_inline
479 901
480#if EV_MINIMAL 902#if EV_FEATURE_CODE
903# define inline_speed ecb_inline
904#else
481# define inline_speed static noinline 905# define inline_speed static noinline
482#else
483# define inline_speed static inline
484#endif 906#endif
485 907
486#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 908#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
487 909
488#if EV_MINPRI == EV_MAXPRI 910#if EV_MINPRI == EV_MAXPRI
… …
501#define ev_active(w) ((W)(w))->active 923#define ev_active(w) ((W)(w))->active
502#define ev_at(w) ((WT)(w))->at 924#define ev_at(w) ((WT)(w))->at
503 925
504#if EV_USE_REALTIME 926#if EV_USE_REALTIME
505/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 927/* sig_atomic_t is used to avoid per-thread variables or locking but still */
506/* giving it a reasonably high chance of working on typical architetcures */ 928/* giving it a reasonably high chance of working on typical architectures */
507static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 929static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
508#endif 930#endif
509 931
510#if EV_USE_MONOTONIC 932#if EV_USE_MONOTONIC
511static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 933static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
525# include "ev_win32.c" 947# include "ev_win32.c"
526#endif 948#endif
527 949
528/*****************************************************************************/ 950/*****************************************************************************/
529 951
952/* define a suitable floor function (only used by periodics atm) */
953
954#if EV_USE_FLOOR
955# include <math.h>
956# define ev_floor(v) floor (v)
957#else
958
959#include <float.h>
960
961/* a floor() replacement function, should be independent of ev_tstamp type */
962static ev_tstamp noinline
963ev_floor (ev_tstamp v)
964{
965 /* the choice of shift factor is not terribly important */
966#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
968#else
969 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
970#endif
971
972 /* argument too large for an unsigned long? */
973 if (expect_false (v >= shift))
974 {
975 ev_tstamp f;
976
977 if (v == v - 1.)
978 return v; /* very large number */
979
980 f = shift * ev_floor (v * (1. / shift));
981 return f + ev_floor (v - f);
982 }
983
984 /* special treatment for negative args? */
985 if (expect_false (v < 0.))
986 {
987 ev_tstamp f = -ev_floor (-v);
988
989 return f - (f == v ? 0 : 1);
990 }
991
992 /* fits into an unsigned long */
993 return (unsigned long)v;
994}
995
996#endif
997
998/*****************************************************************************/
999
1000#ifdef __linux
1001# include <sys/utsname.h>
1002#endif
1003
1004static unsigned int noinline ecb_cold
1005ev_linux_version (void)
1006{
1007#ifdef __linux
1008 unsigned int v = 0;
1009 struct utsname buf;
1010 int i;
1011 char *p = buf.release;
1012
1013 if (uname (&buf))
1014 return 0;
1015
1016 for (i = 3+1; --i; )
1017 {
1018 unsigned int c = 0;
1019
1020 for (;;)
1021 {
1022 if (*p >= '0' && *p <= '9')
1023 c = c * 10 + *p++ - '0';
1024 else
1025 {
1026 p += *p == '.';
1027 break;
1028 }
1029 }
1030
1031 v = (v << 8) | c;
1032 }
1033
1034 return v;
1035#else
1036 return 0;
1037#endif
1038}
1039
1040/*****************************************************************************/
1041
530#if EV_AVOID_STDIO 1042#if EV_AVOID_STDIO
531static void noinline 1043static void noinline ecb_cold
532ev_printerr (const char *msg) 1044ev_printerr (const char *msg)
533{ 1045{
534 write (STDERR_FILENO, msg, strlen (msg)); 1046 write (STDERR_FILENO, msg, strlen (msg));
535} 1047}
536#endif 1048#endif
537 1049
538static void (*syserr_cb)(const char *msg); 1050static void (*syserr_cb)(const char *msg);
539 1051
540void 1052void ecb_cold
541ev_set_syserr_cb (void (*cb)(const char *msg)) 1053ev_set_syserr_cb (void (*cb)(const char *msg))
542{ 1054{
543 syserr_cb = cb; 1055 syserr_cb = cb;
544} 1056}
545 1057
546static void noinline 1058static void noinline ecb_cold
547ev_syserr (const char *msg) 1059ev_syserr (const char *msg)
548{ 1060{
549 if (!msg) 1061 if (!msg)
550 msg = "(libev) system error"; 1062 msg = "(libev) system error";
551 1063
552 if (syserr_cb) 1064 if (syserr_cb)
553 syserr_cb (msg); 1065 syserr_cb (msg);
554 else 1066 else
555 { 1067 {
556#if EV_AVOID_STDIO 1068#if EV_AVOID_STDIO
557 const char *err = strerror (errno);
558
559 ev_printerr (msg); 1069 ev_printerr (msg);
560 ev_printerr (": "); 1070 ev_printerr (": ");
561 ev_printerr (err); 1071 ev_printerr (strerror (errno));
562 ev_printerr ("\n"); 1072 ev_printerr ("\n");
563#else 1073#else
564 perror (msg); 1074 perror (msg);
565#endif 1075#endif
566 abort (); 1076 abort ();
… …
568} 1078}
569 1079
570static void * 1080static void *
571ev_realloc_emul (void *ptr, long size) 1081ev_realloc_emul (void *ptr, long size)
572{ 1082{
1083#if __GLIBC__
1084 return realloc (ptr, size);
1085#else
573 /* some systems, notably openbsd and darwin, fail to properly 1086 /* some systems, notably openbsd and darwin, fail to properly
574 * implement realloc (x, 0) (as required by both ansi c-98 and 1087 * implement realloc (x, 0) (as required by both ansi c-89 and
575 * the single unix specification, so work around them here. 1088 * the single unix specification, so work around them here.
576 */ 1089 */
577 1090
578 if (size) 1091 if (size)
579 return realloc (ptr, size); 1092 return realloc (ptr, size);
580 1093
581 free (ptr); 1094 free (ptr);
582 return 0; 1095 return 0;
1096#endif
583} 1097}
584 1098
585static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1099static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
586 1100
587void 1101void ecb_cold
588ev_set_allocator (void *(*cb)(void *ptr, long size)) 1102ev_set_allocator (void *(*cb)(void *ptr, long size))
589{ 1103{
590 alloc = cb; 1104 alloc = cb;
591} 1105}
592 1106
… …
596 ptr = alloc (ptr, size); 1110 ptr = alloc (ptr, size);
597 1111
598 if (!ptr && size) 1112 if (!ptr && size)
599 { 1113 {
600#if EV_AVOID_STDIO 1114#if EV_AVOID_STDIO
601 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1115 ev_printerr ("(libev) memory allocation failed, aborting.\n");
602#else 1116#else
603 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1117 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
604#endif 1118#endif
605 abort (); 1119 abort ();
606 } 1120 }
607 1121
608 return ptr; 1122 return ptr;
… …
625 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1139 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
626 unsigned char unused; 1140 unsigned char unused;
627#if EV_USE_EPOLL 1141#if EV_USE_EPOLL
628 unsigned int egen; /* generation counter to counter epoll bugs */ 1142 unsigned int egen; /* generation counter to counter epoll bugs */
629#endif 1143#endif
630#if EV_SELECT_IS_WINSOCKET 1144#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
631 SOCKET handle; 1145 SOCKET handle;
1146#endif
1147#if EV_USE_IOCP
1148 OVERLAPPED or, ow;
632#endif 1149#endif
633} ANFD; 1150} ANFD;
634 1151
635/* stores the pending event set for a given watcher */ 1152/* stores the pending event set for a given watcher */
636typedef struct 1153typedef struct
… …
691 1208
692 static int ev_default_loop_ptr; 1209 static int ev_default_loop_ptr;
693 1210
694#endif 1211#endif
695 1212
696#if EV_MINIMAL < 2 1213#if EV_FEATURE_API
697# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1214# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
698# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 1215# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
699# define EV_INVOKE_PENDING invoke_cb (EV_A) 1216# define EV_INVOKE_PENDING invoke_cb (EV_A)
700#else 1217#else
701# define EV_RELEASE_CB (void)0 1218# define EV_RELEASE_CB (void)0
702# define EV_ACQUIRE_CB (void)0 1219# define EV_ACQUIRE_CB (void)0
703# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1220# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
704#endif 1221#endif
705 1222
706#define EVUNLOOP_RECURSE 0x80 1223#define EVBREAK_RECURSE 0x80
707 1224
708/*****************************************************************************/ 1225/*****************************************************************************/
709 1226
710#ifndef EV_HAVE_EV_TIME 1227#ifndef EV_HAVE_EV_TIME
711ev_tstamp 1228ev_tstamp
… …
755 if (delay > 0.) 1272 if (delay > 0.)
756 { 1273 {
757#if EV_USE_NANOSLEEP 1274#if EV_USE_NANOSLEEP
758 struct timespec ts; 1275 struct timespec ts;
759 1276
760 ts.tv_sec = (time_t)delay; 1277 EV_TS_SET (ts, delay);
761 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
762
763 nanosleep (&ts, 0); 1278 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1279#elif defined(_WIN32)
765 Sleep ((unsigned long)(delay * 1e3)); 1280 Sleep ((unsigned long)(delay * 1e3));
766#else 1281#else
767 struct timeval tv; 1282 struct timeval tv;
768 1283
769 tv.tv_sec = (time_t)delay;
770 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
771
772 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1284 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
773 /* something not guaranteed by newer posix versions, but guaranteed */ 1285 /* something not guaranteed by newer posix versions, but guaranteed */
774 /* by older ones */ 1286 /* by older ones */
1287 EV_TV_SET (tv, delay);
775 select (0, 0, 0, 0, &tv); 1288 select (0, 0, 0, 0, &tv);
776#endif 1289#endif
777 } 1290 }
778} 1291}
779 1292
780/*****************************************************************************/ 1293/*****************************************************************************/
781 1294
782#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1295#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
783 1296
784/* find a suitable new size for the given array, */ 1297/* find a suitable new size for the given array, */
785/* hopefully by rounding to a ncie-to-malloc size */ 1298/* hopefully by rounding to a nice-to-malloc size */
786inline_size int 1299inline_size int
787array_nextsize (int elem, int cur, int cnt) 1300array_nextsize (int elem, int cur, int cnt)
788{ 1301{
789 int ncur = cur + 1; 1302 int ncur = cur + 1;
790 1303
… …
802 } 1315 }
803 1316
804 return ncur; 1317 return ncur;
805} 1318}
806 1319
807static noinline void * 1320static void * noinline ecb_cold
808array_realloc (int elem, void *base, int *cur, int cnt) 1321array_realloc (int elem, void *base, int *cur, int cnt)
809{ 1322{
810 *cur = array_nextsize (elem, *cur, cnt); 1323 *cur = array_nextsize (elem, *cur, cnt);
811 return ev_realloc (base, elem * *cur); 1324 return ev_realloc (base, elem * *cur);
812} 1325}
… …
815 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1328 memset ((void *)(base), 0, sizeof (*(base)) * (count))
816 1329
817#define array_needsize(type,base,cur,cnt,init) \ 1330#define array_needsize(type,base,cur,cnt,init) \
818 if (expect_false ((cnt) > (cur))) \ 1331 if (expect_false ((cnt) > (cur))) \
819 { \ 1332 { \
820 int ocur_ = (cur); \ 1333 int ecb_unused ocur_ = (cur); \
821 (base) = (type *)array_realloc \ 1334 (base) = (type *)array_realloc \
822 (sizeof (type), (base), &(cur), (cnt)); \ 1335 (sizeof (type), (base), &(cur), (cnt)); \
823 init ((base) + (ocur_), (cur) - ocur_); \ 1336 init ((base) + (ocur_), (cur) - ocur_); \
824 } 1337 }
825 1338
… …
886} 1399}
887 1400
888/*****************************************************************************/ 1401/*****************************************************************************/
889 1402
890inline_speed void 1403inline_speed void
891fd_event_nc (EV_P_ int fd, int revents) 1404fd_event_nocheck (EV_P_ int fd, int revents)
892{ 1405{
893 ANFD *anfd = anfds + fd; 1406 ANFD *anfd = anfds + fd;
894 ev_io *w; 1407 ev_io *w;
895 1408
896 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1409 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
908fd_event (EV_P_ int fd, int revents) 1421fd_event (EV_P_ int fd, int revents)
909{ 1422{
910 ANFD *anfd = anfds + fd; 1423 ANFD *anfd = anfds + fd;
911 1424
912 if (expect_true (!anfd->reify)) 1425 if (expect_true (!anfd->reify))
913 fd_event_nc (EV_A_ fd, revents); 1426 fd_event_nocheck (EV_A_ fd, revents);
914} 1427}
915 1428
916void 1429void
917ev_feed_fd_event (EV_P_ int fd, int revents) 1430ev_feed_fd_event (EV_P_ int fd, int revents)
918{ 1431{
919 if (fd >= 0 && fd < anfdmax) 1432 if (fd >= 0 && fd < anfdmax)
920 fd_event_nc (EV_A_ fd, revents); 1433 fd_event_nocheck (EV_A_ fd, revents);
921} 1434}
922 1435
923/* make sure the external fd watch events are in-sync */ 1436/* make sure the external fd watch events are in-sync */
924/* with the kernel/libev internal state */ 1437/* with the kernel/libev internal state */
925inline_size void 1438inline_size void
926fd_reify (EV_P) 1439fd_reify (EV_P)
927{ 1440{
928 int i; 1441 int i;
929 1442
1443#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1444 for (i = 0; i < fdchangecnt; ++i)
1445 {
1446 int fd = fdchanges [i];
1447 ANFD *anfd = anfds + fd;
1448
1449 if (anfd->reify & EV__IOFDSET && anfd->head)
1450 {
1451 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1452
1453 if (handle != anfd->handle)
1454 {
1455 unsigned long arg;
1456
1457 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1458
1459 /* handle changed, but fd didn't - we need to do it in two steps */
1460 backend_modify (EV_A_ fd, anfd->events, 0);
1461 anfd->events = 0;
1462 anfd->handle = handle;
1463 }
1464 }
1465 }
1466#endif
1467
930 for (i = 0; i < fdchangecnt; ++i) 1468 for (i = 0; i < fdchangecnt; ++i)
931 { 1469 {
932 int fd = fdchanges [i]; 1470 int fd = fdchanges [i];
933 ANFD *anfd = anfds + fd; 1471 ANFD *anfd = anfds + fd;
934 ev_io *w; 1472 ev_io *w;
935 1473
936 unsigned char events = 0; 1474 unsigned char o_events = anfd->events;
1475 unsigned char o_reify = anfd->reify;
937 1476
938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1477 anfd->reify = 0;
939 events |= (unsigned char)w->events;
940 1478
941#if EV_SELECT_IS_WINSOCKET 1479 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
942 if (events)
943 { 1480 {
944 unsigned long arg; 1481 anfd->events = 0;
945 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1482
946 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1483 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1484 anfd->events |= (unsigned char)w->events;
1485
1486 if (o_events != anfd->events)
1487 o_reify = EV__IOFDSET; /* actually |= */
947 } 1488 }
948#endif
949 1489
950 { 1490 if (o_reify & EV__IOFDSET)
951 unsigned char o_events = anfd->events;
952 unsigned char o_reify = anfd->reify;
953
954 anfd->reify = 0;
955 anfd->events = events;
956
957 if (o_events != events || o_reify & EV__IOFDSET)
958 backend_modify (EV_A_ fd, o_events, events); 1491 backend_modify (EV_A_ fd, o_events, anfd->events);
959 }
960 } 1492 }
961 1493
962 fdchangecnt = 0; 1494 fdchangecnt = 0;
963} 1495}
964 1496
… …
976 fdchanges [fdchangecnt - 1] = fd; 1508 fdchanges [fdchangecnt - 1] = fd;
977 } 1509 }
978} 1510}
979 1511
980/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1512/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
981inline_speed void 1513inline_speed void ecb_cold
982fd_kill (EV_P_ int fd) 1514fd_kill (EV_P_ int fd)
983{ 1515{
984 ev_io *w; 1516 ev_io *w;
985 1517
986 while ((w = (ev_io *)anfds [fd].head)) 1518 while ((w = (ev_io *)anfds [fd].head))
… …
988 ev_io_stop (EV_A_ w); 1520 ev_io_stop (EV_A_ w);
989 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1521 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
990 } 1522 }
991} 1523}
992 1524
993/* check whether the given fd is atcually valid, for error recovery */ 1525/* check whether the given fd is actually valid, for error recovery */
994inline_size int 1526inline_size int ecb_cold
995fd_valid (int fd) 1527fd_valid (int fd)
996{ 1528{
997#ifdef _WIN32 1529#ifdef _WIN32
998 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1530 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
999#else 1531#else
1000 return fcntl (fd, F_GETFD) != -1; 1532 return fcntl (fd, F_GETFD) != -1;
1001#endif 1533#endif
1002} 1534}
1003 1535
1004/* called on EBADF to verify fds */ 1536/* called on EBADF to verify fds */
1005static void noinline 1537static void noinline ecb_cold
1006fd_ebadf (EV_P) 1538fd_ebadf (EV_P)
1007{ 1539{
1008 int fd; 1540 int fd;
1009 1541
1010 for (fd = 0; fd < anfdmax; ++fd) 1542 for (fd = 0; fd < anfdmax; ++fd)
… …
1012 if (!fd_valid (fd) && errno == EBADF) 1544 if (!fd_valid (fd) && errno == EBADF)
1013 fd_kill (EV_A_ fd); 1545 fd_kill (EV_A_ fd);
1014} 1546}
1015 1547
1016/* called on ENOMEM in select/poll to kill some fds and retry */ 1548/* called on ENOMEM in select/poll to kill some fds and retry */
1017static void noinline 1549static void noinline ecb_cold
1018fd_enomem (EV_P) 1550fd_enomem (EV_P)
1019{ 1551{
1020 int fd; 1552 int fd;
1021 1553
1022 for (fd = anfdmax; fd--; ) 1554 for (fd = anfdmax; fd--; )
… …
1040 anfds [fd].emask = 0; 1572 anfds [fd].emask = 0;
1041 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 1573 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1042 } 1574 }
1043} 1575}
1044 1576
1577/* used to prepare libev internal fd's */
1578/* this is not fork-safe */
1579inline_speed void
1580fd_intern (int fd)
1581{
1582#ifdef _WIN32
1583 unsigned long arg = 1;
1584 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1585#else
1586 fcntl (fd, F_SETFD, FD_CLOEXEC);
1587 fcntl (fd, F_SETFL, O_NONBLOCK);
1588#endif
1589}
1590
1045/*****************************************************************************/ 1591/*****************************************************************************/
1046 1592
1047/* 1593/*
1048 * the heap functions want a real array index. array index 0 uis guaranteed to not 1594 * the heap functions want a real array index. array index 0 is guaranteed to not
1049 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1595 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1050 * the branching factor of the d-tree. 1596 * the branching factor of the d-tree.
1051 */ 1597 */
1052 1598
1053/* 1599/*
… …
1201 1747
1202static ANSIG signals [EV_NSIG - 1]; 1748static ANSIG signals [EV_NSIG - 1];
1203 1749
1204/*****************************************************************************/ 1750/*****************************************************************************/
1205 1751
1206/* used to prepare libev internal fd's */ 1752#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1207/* this is not fork-safe */
1208inline_speed void
1209fd_intern (int fd)
1210{
1211#ifdef _WIN32
1212 unsigned long arg = 1;
1213 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1214#else
1215 fcntl (fd, F_SETFD, FD_CLOEXEC);
1216 fcntl (fd, F_SETFL, O_NONBLOCK);
1217#endif
1218}
1219 1753
1220static void noinline 1754static void noinline ecb_cold
1221evpipe_init (EV_P) 1755evpipe_init (EV_P)
1222{ 1756{
1223 if (!ev_is_active (&pipe_w)) 1757 if (!ev_is_active (&pipe_w))
1224 { 1758 {
1225#if EV_USE_EVENTFD 1759# if EV_USE_EVENTFD
1226 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 1760 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1227 if (evfd < 0 && errno == EINVAL) 1761 if (evfd < 0 && errno == EINVAL)
1228 evfd = eventfd (0, 0); 1762 evfd = eventfd (0, 0);
1229 1763
1230 if (evfd >= 0) 1764 if (evfd >= 0)
… …
1232 evpipe [0] = -1; 1766 evpipe [0] = -1;
1233 fd_intern (evfd); /* doing it twice doesn't hurt */ 1767 fd_intern (evfd); /* doing it twice doesn't hurt */
1234 ev_io_set (&pipe_w, evfd, EV_READ); 1768 ev_io_set (&pipe_w, evfd, EV_READ);
1235 } 1769 }
1236 else 1770 else
1237#endif 1771# endif
1238 { 1772 {
1239 while (pipe (evpipe)) 1773 while (pipe (evpipe))
1240 ev_syserr ("(libev) error creating signal/async pipe"); 1774 ev_syserr ("(libev) error creating signal/async pipe");
1241 1775
1242 fd_intern (evpipe [0]); 1776 fd_intern (evpipe [0]);
… …
1247 ev_io_start (EV_A_ &pipe_w); 1781 ev_io_start (EV_A_ &pipe_w);
1248 ev_unref (EV_A); /* watcher should not keep loop alive */ 1782 ev_unref (EV_A); /* watcher should not keep loop alive */
1249 } 1783 }
1250} 1784}
1251 1785
1252inline_size void 1786inline_speed void
1253evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1787evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1254{ 1788{
1255 if (!*flag) 1789 if (expect_true (*flag))
1790 return;
1791
1792 *flag = 1;
1793
1794 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1795
1796 pipe_write_skipped = 1;
1797
1798 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1799
1800 if (pipe_write_wanted)
1256 { 1801 {
1802 int old_errno;
1803
1804 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1805
1257 int old_errno = errno; /* save errno because write might clobber it */ 1806 old_errno = errno; /* save errno because write will clobber it */
1258
1259 *flag = 1;
1260 1807
1261#if EV_USE_EVENTFD 1808#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1809 if (evfd >= 0)
1263 { 1810 {
1264 uint64_t counter = 1; 1811 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1812 write (evfd, &counter, sizeof (uint64_t));
1266 } 1813 }
1267 else 1814 else
1268#endif 1815#endif
1816 {
1817 /* win32 people keep sending patches that change this write() to send() */
1818 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1819 /* so when you think this write should be a send instead, please find out */
1820 /* where your send() is from - it's definitely not the microsoft send, and */
1821 /* tell me. thank you. */
1269 write (evpipe [1], &old_errno, 1); 1822 write (evpipe [1], &(evpipe [1]), 1);
1823 }
1270 1824
1271 errno = old_errno; 1825 errno = old_errno;
1272 } 1826 }
1273} 1827}
1274 1828
… …
1277static void 1831static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1832pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1833{
1280 int i; 1834 int i;
1281 1835
1836 if (revents & EV_READ)
1837 {
1282#if EV_USE_EVENTFD 1838#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1839 if (evfd >= 0)
1284 { 1840 {
1285 uint64_t counter; 1841 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1842 read (evfd, &counter, sizeof (uint64_t));
1287 } 1843 }
1288 else 1844 else
1289#endif 1845#endif
1290 { 1846 {
1291 char dummy; 1847 char dummy;
1848 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1849 read (evpipe [0], &dummy, 1);
1850 }
1293 } 1851 }
1294 1852
1853 pipe_write_skipped = 0;
1854
1855#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1856 if (sig_pending)
1296 { 1857 {
1297 sig_pending = 0; 1858 sig_pending = 0;
1298 1859
1299 for (i = EV_NSIG - 1; i--; ) 1860 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1861 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1862 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1863 }
1864#endif
1303 1865
1304#if EV_ASYNC_ENABLE 1866#if EV_ASYNC_ENABLE
1305 if (async_pending) 1867 if (async_pending)
1306 { 1868 {
1307 async_pending = 0; 1869 async_pending = 0;
… …
1316#endif 1878#endif
1317} 1879}
1318 1880
1319/*****************************************************************************/ 1881/*****************************************************************************/
1320 1882
1883void
1884ev_feed_signal (int signum)
1885{
1886#if EV_MULTIPLICITY
1887 EV_P = signals [signum - 1].loop;
1888
1889 if (!EV_A)
1890 return;
1891#endif
1892
1893 if (!ev_active (&pipe_w))
1894 return;
1895
1896 signals [signum - 1].pending = 1;
1897 evpipe_write (EV_A_ &sig_pending);
1898}
1899
1321static void 1900static void
1322ev_sighandler (int signum) 1901ev_sighandler (int signum)
1323{ 1902{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1903#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1904 signal (signum, ev_sighandler);
1330#endif 1905#endif
1331 1906
1332 signals [signum - 1].pending = 1; 1907 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1908}
1335 1909
1336void noinline 1910void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1911ev_feed_signal_event (EV_P_ int signum)
1338{ 1912{
… …
1375 break; 1949 break;
1376 } 1950 }
1377} 1951}
1378#endif 1952#endif
1379 1953
1954#endif
1955
1380/*****************************************************************************/ 1956/*****************************************************************************/
1381 1957
1958#if EV_CHILD_ENABLE
1382static WL childs [EV_PID_HASHSIZE]; 1959static WL childs [EV_PID_HASHSIZE];
1383
1384#ifndef _WIN32
1385 1960
1386static ev_signal childev; 1961static ev_signal childev;
1387 1962
1388#ifndef WIFCONTINUED 1963#ifndef WIFCONTINUED
1389# define WIFCONTINUED(status) 0 1964# define WIFCONTINUED(status) 0
… …
1394child_reap (EV_P_ int chain, int pid, int status) 1969child_reap (EV_P_ int chain, int pid, int status)
1395{ 1970{
1396 ev_child *w; 1971 ev_child *w;
1397 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1972 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1398 1973
1399 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1974 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1400 { 1975 {
1401 if ((w->pid == pid || !w->pid) 1976 if ((w->pid == pid || !w->pid)
1402 && (!traced || (w->flags & 1))) 1977 && (!traced || (w->flags & 1)))
1403 { 1978 {
1404 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1979 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1429 /* make sure we are called again until all children have been reaped */ 2004 /* make sure we are called again until all children have been reaped */
1430 /* we need to do it this way so that the callback gets called before we continue */ 2005 /* we need to do it this way so that the callback gets called before we continue */
1431 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2006 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1432 2007
1433 child_reap (EV_A_ pid, pid, status); 2008 child_reap (EV_A_ pid, pid, status);
1434 if (EV_PID_HASHSIZE > 1) 2009 if ((EV_PID_HASHSIZE) > 1)
1435 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2010 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1436} 2011}
1437 2012
1438#endif 2013#endif
1439 2014
1440/*****************************************************************************/ 2015/*****************************************************************************/
1441 2016
2017#if EV_USE_IOCP
2018# include "ev_iocp.c"
2019#endif
1442#if EV_USE_PORT 2020#if EV_USE_PORT
1443# include "ev_port.c" 2021# include "ev_port.c"
1444#endif 2022#endif
1445#if EV_USE_KQUEUE 2023#if EV_USE_KQUEUE
1446# include "ev_kqueue.c" 2024# include "ev_kqueue.c"
… …
1453#endif 2031#endif
1454#if EV_USE_SELECT 2032#if EV_USE_SELECT
1455# include "ev_select.c" 2033# include "ev_select.c"
1456#endif 2034#endif
1457 2035
1458int 2036int ecb_cold
1459ev_version_major (void) 2037ev_version_major (void)
1460{ 2038{
1461 return EV_VERSION_MAJOR; 2039 return EV_VERSION_MAJOR;
1462} 2040}
1463 2041
1464int 2042int ecb_cold
1465ev_version_minor (void) 2043ev_version_minor (void)
1466{ 2044{
1467 return EV_VERSION_MINOR; 2045 return EV_VERSION_MINOR;
1468} 2046}
1469 2047
1470/* return true if we are running with elevated privileges and should ignore env variables */ 2048/* return true if we are running with elevated privileges and should ignore env variables */
1471int inline_size 2049int inline_size ecb_cold
1472enable_secure (void) 2050enable_secure (void)
1473{ 2051{
1474#ifdef _WIN32 2052#ifdef _WIN32
1475 return 0; 2053 return 0;
1476#else 2054#else
1477 return getuid () != geteuid () 2055 return getuid () != geteuid ()
1478 || getgid () != getegid (); 2056 || getgid () != getegid ();
1479#endif 2057#endif
1480} 2058}
1481 2059
1482unsigned int 2060unsigned int ecb_cold
1483ev_supported_backends (void) 2061ev_supported_backends (void)
1484{ 2062{
1485 unsigned int flags = 0; 2063 unsigned int flags = 0;
1486 2064
1487 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2065 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1491 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2069 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1492 2070
1493 return flags; 2071 return flags;
1494} 2072}
1495 2073
1496unsigned int 2074unsigned int ecb_cold
1497ev_recommended_backends (void) 2075ev_recommended_backends (void)
1498{ 2076{
1499 unsigned int flags = ev_supported_backends (); 2077 unsigned int flags = ev_supported_backends ();
1500 2078
1501#ifndef __NetBSD__ 2079#ifndef __NetBSD__
… …
1506#ifdef __APPLE__ 2084#ifdef __APPLE__
1507 /* only select works correctly on that "unix-certified" platform */ 2085 /* only select works correctly on that "unix-certified" platform */
1508 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2086 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1509 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2087 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1510#endif 2088#endif
2089#ifdef __FreeBSD__
2090 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2091#endif
1511 2092
1512 return flags; 2093 return flags;
1513} 2094}
1514 2095
1515unsigned int 2096unsigned int ecb_cold
1516ev_embeddable_backends (void) 2097ev_embeddable_backends (void)
1517{ 2098{
1518 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2099 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1519 2100
1520 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2101 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1521 /* please fix it and tell me how to detect the fix */ 2102 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1522 flags &= ~EVBACKEND_EPOLL; 2103 flags &= ~EVBACKEND_EPOLL;
1523 2104
1524 return flags; 2105 return flags;
1525} 2106}
1526 2107
1527unsigned int 2108unsigned int
1528ev_backend (EV_P) 2109ev_backend (EV_P)
1529{ 2110{
1530 return backend; 2111 return backend;
1531} 2112}
1532 2113
1533#if EV_MINIMAL < 2 2114#if EV_FEATURE_API
1534unsigned int 2115unsigned int
1535ev_loop_count (EV_P) 2116ev_iteration (EV_P)
1536{ 2117{
1537 return loop_count; 2118 return loop_count;
1538} 2119}
1539 2120
1540unsigned int 2121unsigned int
1541ev_loop_depth (EV_P) 2122ev_depth (EV_P)
1542{ 2123{
1543 return loop_depth; 2124 return loop_depth;
1544} 2125}
1545 2126
1546void 2127void
… …
1565ev_userdata (EV_P) 2146ev_userdata (EV_P)
1566{ 2147{
1567 return userdata; 2148 return userdata;
1568} 2149}
1569 2150
2151void
1570void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2152ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1571{ 2153{
1572 invoke_cb = invoke_pending_cb; 2154 invoke_cb = invoke_pending_cb;
1573} 2155}
1574 2156
2157void
1575void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2158ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1576{ 2159{
1577 release_cb = release; 2160 release_cb = release;
1578 acquire_cb = acquire; 2161 acquire_cb = acquire;
1579} 2162}
1580#endif 2163#endif
1581 2164
1582/* initialise a loop structure, must be zero-initialised */ 2165/* initialise a loop structure, must be zero-initialised */
1583static void noinline 2166static void noinline ecb_cold
1584loop_init (EV_P_ unsigned int flags) 2167loop_init (EV_P_ unsigned int flags)
1585{ 2168{
1586 if (!backend) 2169 if (!backend)
1587 { 2170 {
2171 origflags = flags;
2172
1588#if EV_USE_REALTIME 2173#if EV_USE_REALTIME
1589 if (!have_realtime) 2174 if (!have_realtime)
1590 { 2175 {
1591 struct timespec ts; 2176 struct timespec ts;
1592 2177
… …
1614 if (!(flags & EVFLAG_NOENV) 2199 if (!(flags & EVFLAG_NOENV)
1615 && !enable_secure () 2200 && !enable_secure ()
1616 && getenv ("LIBEV_FLAGS")) 2201 && getenv ("LIBEV_FLAGS"))
1617 flags = atoi (getenv ("LIBEV_FLAGS")); 2202 flags = atoi (getenv ("LIBEV_FLAGS"));
1618 2203
1619 ev_rt_now = ev_time (); 2204 ev_rt_now = ev_time ();
1620 mn_now = get_clock (); 2205 mn_now = get_clock ();
1621 now_floor = mn_now; 2206 now_floor = mn_now;
1622 rtmn_diff = ev_rt_now - mn_now; 2207 rtmn_diff = ev_rt_now - mn_now;
1623#if EV_MINIMAL < 2 2208#if EV_FEATURE_API
1624 invoke_cb = ev_invoke_pending; 2209 invoke_cb = ev_invoke_pending;
1625#endif 2210#endif
1626 2211
1627 io_blocktime = 0.; 2212 io_blocktime = 0.;
1628 timeout_blocktime = 0.; 2213 timeout_blocktime = 0.;
1629 backend = 0; 2214 backend = 0;
1630 backend_fd = -1; 2215 backend_fd = -1;
1631 sig_pending = 0; 2216 sig_pending = 0;
1632#if EV_ASYNC_ENABLE 2217#if EV_ASYNC_ENABLE
1633 async_pending = 0; 2218 async_pending = 0;
1634#endif 2219#endif
2220 pipe_write_skipped = 0;
2221 pipe_write_wanted = 0;
1635#if EV_USE_INOTIFY 2222#if EV_USE_INOTIFY
1636 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2223 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1637#endif 2224#endif
1638#if EV_USE_SIGNALFD 2225#if EV_USE_SIGNALFD
1639 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2226 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1640#endif 2227#endif
1641 2228
1642 if (!(flags & 0x0000ffffU)) 2229 if (!(flags & EVBACKEND_MASK))
1643 flags |= ev_recommended_backends (); 2230 flags |= ev_recommended_backends ();
1644 2231
2232#if EV_USE_IOCP
2233 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2234#endif
1645#if EV_USE_PORT 2235#if EV_USE_PORT
1646 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2236 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1647#endif 2237#endif
1648#if EV_USE_KQUEUE 2238#if EV_USE_KQUEUE
1649 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2239 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1658 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2248 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1659#endif 2249#endif
1660 2250
1661 ev_prepare_init (&pending_w, pendingcb); 2251 ev_prepare_init (&pending_w, pendingcb);
1662 2252
2253#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1663 ev_init (&pipe_w, pipecb); 2254 ev_init (&pipe_w, pipecb);
1664 ev_set_priority (&pipe_w, EV_MAXPRI); 2255 ev_set_priority (&pipe_w, EV_MAXPRI);
2256#endif
1665 } 2257 }
1666} 2258}
1667 2259
1668/* free up a loop structure */ 2260/* free up a loop structure */
1669static void noinline 2261void ecb_cold
1670loop_destroy (EV_P) 2262ev_loop_destroy (EV_P)
1671{ 2263{
1672 int i; 2264 int i;
2265
2266#if EV_MULTIPLICITY
2267 /* mimic free (0) */
2268 if (!EV_A)
2269 return;
2270#endif
2271
2272#if EV_CLEANUP_ENABLE
2273 /* queue cleanup watchers (and execute them) */
2274 if (expect_false (cleanupcnt))
2275 {
2276 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2277 EV_INVOKE_PENDING;
2278 }
2279#endif
2280
2281#if EV_CHILD_ENABLE
2282 if (ev_is_active (&childev))
2283 {
2284 ev_ref (EV_A); /* child watcher */
2285 ev_signal_stop (EV_A_ &childev);
2286 }
2287#endif
1673 2288
1674 if (ev_is_active (&pipe_w)) 2289 if (ev_is_active (&pipe_w))
1675 { 2290 {
1676 /*ev_ref (EV_A);*/ 2291 /*ev_ref (EV_A);*/
1677 /*ev_io_stop (EV_A_ &pipe_w);*/ 2292 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1699#endif 2314#endif
1700 2315
1701 if (backend_fd >= 0) 2316 if (backend_fd >= 0)
1702 close (backend_fd); 2317 close (backend_fd);
1703 2318
2319#if EV_USE_IOCP
2320 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2321#endif
1704#if EV_USE_PORT 2322#if EV_USE_PORT
1705 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2323 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1706#endif 2324#endif
1707#if EV_USE_KQUEUE 2325#if EV_USE_KQUEUE
1708 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2326 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1735 array_free (periodic, EMPTY); 2353 array_free (periodic, EMPTY);
1736#endif 2354#endif
1737#if EV_FORK_ENABLE 2355#if EV_FORK_ENABLE
1738 array_free (fork, EMPTY); 2356 array_free (fork, EMPTY);
1739#endif 2357#endif
2358#if EV_CLEANUP_ENABLE
2359 array_free (cleanup, EMPTY);
2360#endif
1740 array_free (prepare, EMPTY); 2361 array_free (prepare, EMPTY);
1741 array_free (check, EMPTY); 2362 array_free (check, EMPTY);
1742#if EV_ASYNC_ENABLE 2363#if EV_ASYNC_ENABLE
1743 array_free (async, EMPTY); 2364 array_free (async, EMPTY);
1744#endif 2365#endif
1745 2366
1746 backend = 0; 2367 backend = 0;
2368
2369#if EV_MULTIPLICITY
2370 if (ev_is_default_loop (EV_A))
2371#endif
2372 ev_default_loop_ptr = 0;
2373#if EV_MULTIPLICITY
2374 else
2375 ev_free (EV_A);
2376#endif
1747} 2377}
1748 2378
1749#if EV_USE_INOTIFY 2379#if EV_USE_INOTIFY
1750inline_size void infy_fork (EV_P); 2380inline_size void infy_fork (EV_P);
1751#endif 2381#endif
… …
1766 infy_fork (EV_A); 2396 infy_fork (EV_A);
1767#endif 2397#endif
1768 2398
1769 if (ev_is_active (&pipe_w)) 2399 if (ev_is_active (&pipe_w))
1770 { 2400 {
1771 /* this "locks" the handlers against writing to the pipe */ 2401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1772 /* while we modify the fd vars */
1773 sig_pending = 1;
1774#if EV_ASYNC_ENABLE
1775 async_pending = 1;
1776#endif
1777 2402
1778 ev_ref (EV_A); 2403 ev_ref (EV_A);
1779 ev_io_stop (EV_A_ &pipe_w); 2404 ev_io_stop (EV_A_ &pipe_w);
1780 2405
1781#if EV_USE_EVENTFD 2406#if EV_USE_EVENTFD
… …
1787 { 2412 {
1788 EV_WIN32_CLOSE_FD (evpipe [0]); 2413 EV_WIN32_CLOSE_FD (evpipe [0]);
1789 EV_WIN32_CLOSE_FD (evpipe [1]); 2414 EV_WIN32_CLOSE_FD (evpipe [1]);
1790 } 2415 }
1791 2416
2417#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1792 evpipe_init (EV_A); 2418 evpipe_init (EV_A);
1793 /* now iterate over everything, in case we missed something */ 2419 /* now iterate over everything, in case we missed something */
1794 pipecb (EV_A_ &pipe_w, EV_READ); 2420 pipecb (EV_A_ &pipe_w, EV_READ);
2421#endif
1795 } 2422 }
1796 2423
1797 postfork = 0; 2424 postfork = 0;
1798} 2425}
1799 2426
1800#if EV_MULTIPLICITY 2427#if EV_MULTIPLICITY
1801 2428
1802struct ev_loop * 2429struct ev_loop * ecb_cold
1803ev_loop_new (unsigned int flags) 2430ev_loop_new (unsigned int flags)
1804{ 2431{
1805 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2432 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1806 2433
1807 memset (EV_A, 0, sizeof (struct ev_loop)); 2434 memset (EV_A, 0, sizeof (struct ev_loop));
1808 loop_init (EV_A_ flags); 2435 loop_init (EV_A_ flags);
1809 2436
1810 if (ev_backend (EV_A)) 2437 if (ev_backend (EV_A))
1811 return EV_A; 2438 return EV_A;
1812 2439
2440 ev_free (EV_A);
1813 return 0; 2441 return 0;
1814} 2442}
1815 2443
1816void
1817ev_loop_destroy (EV_P)
1818{
1819 loop_destroy (EV_A);
1820 ev_free (loop);
1821}
1822
1823void
1824ev_loop_fork (EV_P)
1825{
1826 postfork = 1; /* must be in line with ev_default_fork */
1827}
1828#endif /* multiplicity */ 2444#endif /* multiplicity */
1829 2445
1830#if EV_VERIFY 2446#if EV_VERIFY
1831static void noinline 2447static void noinline ecb_cold
1832verify_watcher (EV_P_ W w) 2448verify_watcher (EV_P_ W w)
1833{ 2449{
1834 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2450 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1835 2451
1836 if (w->pending) 2452 if (w->pending)
1837 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2453 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1838} 2454}
1839 2455
1840static void noinline 2456static void noinline ecb_cold
1841verify_heap (EV_P_ ANHE *heap, int N) 2457verify_heap (EV_P_ ANHE *heap, int N)
1842{ 2458{
1843 int i; 2459 int i;
1844 2460
1845 for (i = HEAP0; i < N + HEAP0; ++i) 2461 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1850 2466
1851 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1852 } 2468 }
1853} 2469}
1854 2470
1855static void noinline 2471static void noinline ecb_cold
1856array_verify (EV_P_ W *ws, int cnt) 2472array_verify (EV_P_ W *ws, int cnt)
1857{ 2473{
1858 while (cnt--) 2474 while (cnt--)
1859 { 2475 {
1860 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2476 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1861 verify_watcher (EV_A_ ws [cnt]); 2477 verify_watcher (EV_A_ ws [cnt]);
1862 } 2478 }
1863} 2479}
1864#endif 2480#endif
1865 2481
1866#if EV_MINIMAL < 2 2482#if EV_FEATURE_API
1867void 2483void ecb_cold
1868ev_loop_verify (EV_P) 2484ev_verify (EV_P)
1869{ 2485{
1870#if EV_VERIFY 2486#if EV_VERIFY
1871 int i; 2487 int i;
1872 WL w; 2488 WL w;
1873 2489
… …
1907#if EV_FORK_ENABLE 2523#if EV_FORK_ENABLE
1908 assert (forkmax >= forkcnt); 2524 assert (forkmax >= forkcnt);
1909 array_verify (EV_A_ (W *)forks, forkcnt); 2525 array_verify (EV_A_ (W *)forks, forkcnt);
1910#endif 2526#endif
1911 2527
2528#if EV_CLEANUP_ENABLE
2529 assert (cleanupmax >= cleanupcnt);
2530 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2531#endif
2532
1912#if EV_ASYNC_ENABLE 2533#if EV_ASYNC_ENABLE
1913 assert (asyncmax >= asynccnt); 2534 assert (asyncmax >= asynccnt);
1914 array_verify (EV_A_ (W *)asyncs, asynccnt); 2535 array_verify (EV_A_ (W *)asyncs, asynccnt);
1915#endif 2536#endif
1916 2537
2538#if EV_PREPARE_ENABLE
1917 assert (preparemax >= preparecnt); 2539 assert (preparemax >= preparecnt);
1918 array_verify (EV_A_ (W *)prepares, preparecnt); 2540 array_verify (EV_A_ (W *)prepares, preparecnt);
2541#endif
1919 2542
2543#if EV_CHECK_ENABLE
1920 assert (checkmax >= checkcnt); 2544 assert (checkmax >= checkcnt);
1921 array_verify (EV_A_ (W *)checks, checkcnt); 2545 array_verify (EV_A_ (W *)checks, checkcnt);
2546#endif
1922 2547
1923# if 0 2548# if 0
2549#if EV_CHILD_ENABLE
1924 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1925 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) 2551 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2552#endif
1926# endif 2553# endif
1927#endif 2554#endif
1928} 2555}
1929#endif 2556#endif
1930 2557
1931#if EV_MULTIPLICITY 2558#if EV_MULTIPLICITY
1932struct ev_loop * 2559struct ev_loop * ecb_cold
1933ev_default_loop_init (unsigned int flags)
1934#else 2560#else
1935int 2561int
2562#endif
1936ev_default_loop (unsigned int flags) 2563ev_default_loop (unsigned int flags)
1937#endif
1938{ 2564{
1939 if (!ev_default_loop_ptr) 2565 if (!ev_default_loop_ptr)
1940 { 2566 {
1941#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
1942 EV_P = ev_default_loop_ptr = &default_loop_struct; 2568 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1946 2572
1947 loop_init (EV_A_ flags); 2573 loop_init (EV_A_ flags);
1948 2574
1949 if (ev_backend (EV_A)) 2575 if (ev_backend (EV_A))
1950 { 2576 {
1951#ifndef _WIN32 2577#if EV_CHILD_ENABLE
1952 ev_signal_init (&childev, childcb, SIGCHLD); 2578 ev_signal_init (&childev, childcb, SIGCHLD);
1953 ev_set_priority (&childev, EV_MAXPRI); 2579 ev_set_priority (&childev, EV_MAXPRI);
1954 ev_signal_start (EV_A_ &childev); 2580 ev_signal_start (EV_A_ &childev);
1955 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2581 ev_unref (EV_A); /* child watcher should not keep loop alive */
1956#endif 2582#endif
… …
1961 2587
1962 return ev_default_loop_ptr; 2588 return ev_default_loop_ptr;
1963} 2589}
1964 2590
1965void 2591void
1966ev_default_destroy (void) 2592ev_loop_fork (EV_P)
1967{ 2593{
1968#if EV_MULTIPLICITY
1969 EV_P = ev_default_loop_ptr;
1970#endif
1971
1972 ev_default_loop_ptr = 0;
1973
1974#ifndef _WIN32
1975 ev_ref (EV_A); /* child watcher */
1976 ev_signal_stop (EV_A_ &childev);
1977#endif
1978
1979 loop_destroy (EV_A);
1980}
1981
1982void
1983ev_default_fork (void)
1984{
1985#if EV_MULTIPLICITY
1986 EV_P = ev_default_loop_ptr;
1987#endif
1988
1989 postfork = 1; /* must be in line with ev_loop_fork */ 2594 postfork = 1; /* must be in line with ev_default_fork */
1990} 2595}
1991 2596
1992/*****************************************************************************/ 2597/*****************************************************************************/
1993 2598
1994void 2599void
… …
2016 2621
2017 for (pri = NUMPRI; pri--; ) 2622 for (pri = NUMPRI; pri--; )
2018 while (pendingcnt [pri]) 2623 while (pendingcnt [pri])
2019 { 2624 {
2020 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2625 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2021
2022 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2023 /* ^ this is no longer true, as pending_w could be here */
2024 2626
2025 p->w->pending = 0; 2627 p->w->pending = 0;
2026 EV_CB_INVOKE (p->w, p->events); 2628 EV_CB_INVOKE (p->w, p->events);
2027 EV_FREQUENT_CHECK; 2629 EV_FREQUENT_CHECK;
2028 } 2630 }
… …
2085 EV_FREQUENT_CHECK; 2687 EV_FREQUENT_CHECK;
2086 feed_reverse (EV_A_ (W)w); 2688 feed_reverse (EV_A_ (W)w);
2087 } 2689 }
2088 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2690 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2089 2691
2090 feed_reverse_done (EV_A_ EV_TIMEOUT); 2692 feed_reverse_done (EV_A_ EV_TIMER);
2091 } 2693 }
2092} 2694}
2093 2695
2094#if EV_PERIODIC_ENABLE 2696#if EV_PERIODIC_ENABLE
2697
2698static void noinline
2699periodic_recalc (EV_P_ ev_periodic *w)
2700{
2701 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2702 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2703
2704 /* the above almost always errs on the low side */
2705 while (at <= ev_rt_now)
2706 {
2707 ev_tstamp nat = at + w->interval;
2708
2709 /* when resolution fails us, we use ev_rt_now */
2710 if (expect_false (nat == at))
2711 {
2712 at = ev_rt_now;
2713 break;
2714 }
2715
2716 at = nat;
2717 }
2718
2719 ev_at (w) = at;
2720}
2721
2095/* make periodics pending */ 2722/* make periodics pending */
2096inline_size void 2723inline_size void
2097periodics_reify (EV_P) 2724periodics_reify (EV_P)
2098{ 2725{
2099 EV_FREQUENT_CHECK; 2726 EV_FREQUENT_CHECK;
… …
2118 ANHE_at_cache (periodics [HEAP0]); 2745 ANHE_at_cache (periodics [HEAP0]);
2119 downheap (periodics, periodiccnt, HEAP0); 2746 downheap (periodics, periodiccnt, HEAP0);
2120 } 2747 }
2121 else if (w->interval) 2748 else if (w->interval)
2122 { 2749 {
2123 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2750 periodic_recalc (EV_A_ w);
2124 /* if next trigger time is not sufficiently in the future, put it there */
2125 /* this might happen because of floating point inexactness */
2126 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2127 {
2128 ev_at (w) += w->interval;
2129
2130 /* if interval is unreasonably low we might still have a time in the past */
2131 /* so correct this. this will make the periodic very inexact, but the user */
2132 /* has effectively asked to get triggered more often than possible */
2133 if (ev_at (w) < ev_rt_now)
2134 ev_at (w) = ev_rt_now;
2135 }
2136
2137 ANHE_at_cache (periodics [HEAP0]); 2751 ANHE_at_cache (periodics [HEAP0]);
2138 downheap (periodics, periodiccnt, HEAP0); 2752 downheap (periodics, periodiccnt, HEAP0);
2139 } 2753 }
2140 else 2754 else
2141 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2755 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2148 feed_reverse_done (EV_A_ EV_PERIODIC); 2762 feed_reverse_done (EV_A_ EV_PERIODIC);
2149 } 2763 }
2150} 2764}
2151 2765
2152/* simply recalculate all periodics */ 2766/* simply recalculate all periodics */
2153/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2767/* TODO: maybe ensure that at least one event happens when jumping forward? */
2154static void noinline 2768static void noinline ecb_cold
2155periodics_reschedule (EV_P) 2769periodics_reschedule (EV_P)
2156{ 2770{
2157 int i; 2771 int i;
2158 2772
2159 /* adjust periodics after time jump */ 2773 /* adjust periodics after time jump */
… …
2162 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2776 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2163 2777
2164 if (w->reschedule_cb) 2778 if (w->reschedule_cb)
2165 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2166 else if (w->interval) 2780 else if (w->interval)
2167 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2781 periodic_recalc (EV_A_ w);
2168 2782
2169 ANHE_at_cache (periodics [i]); 2783 ANHE_at_cache (periodics [i]);
2170 } 2784 }
2171 2785
2172 reheap (periodics, periodiccnt); 2786 reheap (periodics, periodiccnt);
2173} 2787}
2174#endif 2788#endif
2175 2789
2176/* adjust all timers by a given offset */ 2790/* adjust all timers by a given offset */
2177static void noinline 2791static void noinline ecb_cold
2178timers_reschedule (EV_P_ ev_tstamp adjust) 2792timers_reschedule (EV_P_ ev_tstamp adjust)
2179{ 2793{
2180 int i; 2794 int i;
2181 2795
2182 for (i = 0; i < timercnt; ++i) 2796 for (i = 0; i < timercnt; ++i)
… …
2219 * doesn't hurt either as we only do this on time-jumps or 2833 * doesn't hurt either as we only do this on time-jumps or
2220 * in the unlikely event of having been preempted here. 2834 * in the unlikely event of having been preempted here.
2221 */ 2835 */
2222 for (i = 4; --i; ) 2836 for (i = 4; --i; )
2223 { 2837 {
2838 ev_tstamp diff;
2224 rtmn_diff = ev_rt_now - mn_now; 2839 rtmn_diff = ev_rt_now - mn_now;
2225 2840
2841 diff = odiff - rtmn_diff;
2842
2226 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2843 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2227 return; /* all is well */ 2844 return; /* all is well */
2228 2845
2229 ev_rt_now = ev_time (); 2846 ev_rt_now = ev_time ();
2230 mn_now = get_clock (); 2847 mn_now = get_clock ();
2231 now_floor = mn_now; 2848 now_floor = mn_now;
… …
2254 mn_now = ev_rt_now; 2871 mn_now = ev_rt_now;
2255 } 2872 }
2256} 2873}
2257 2874
2258void 2875void
2259ev_loop (EV_P_ int flags) 2876ev_run (EV_P_ int flags)
2260{ 2877{
2261#if EV_MINIMAL < 2 2878#if EV_FEATURE_API
2262 ++loop_depth; 2879 ++loop_depth;
2263#endif 2880#endif
2264 2881
2265 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2882 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2266 2883
2267 loop_done = EVUNLOOP_CANCEL; 2884 loop_done = EVBREAK_CANCEL;
2268 2885
2269 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2886 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2270 2887
2271 do 2888 do
2272 { 2889 {
2273#if EV_VERIFY >= 2 2890#if EV_VERIFY >= 2
2274 ev_loop_verify (EV_A); 2891 ev_verify (EV_A);
2275#endif 2892#endif
2276 2893
2277#ifndef _WIN32 2894#ifndef _WIN32
2278 if (expect_false (curpid)) /* penalise the forking check even more */ 2895 if (expect_false (curpid)) /* penalise the forking check even more */
2279 if (expect_false (getpid () != curpid)) 2896 if (expect_false (getpid () != curpid))
… …
2291 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2908 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2292 EV_INVOKE_PENDING; 2909 EV_INVOKE_PENDING;
2293 } 2910 }
2294#endif 2911#endif
2295 2912
2913#if EV_PREPARE_ENABLE
2296 /* queue prepare watchers (and execute them) */ 2914 /* queue prepare watchers (and execute them) */
2297 if (expect_false (preparecnt)) 2915 if (expect_false (preparecnt))
2298 { 2916 {
2299 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2300 EV_INVOKE_PENDING; 2918 EV_INVOKE_PENDING;
2301 } 2919 }
2920#endif
2302 2921
2303 if (expect_false (loop_done)) 2922 if (expect_false (loop_done))
2304 break; 2923 break;
2305 2924
2306 /* we might have forked, so reify kernel state if necessary */ 2925 /* we might have forked, so reify kernel state if necessary */
… …
2313 /* calculate blocking time */ 2932 /* calculate blocking time */
2314 { 2933 {
2315 ev_tstamp waittime = 0.; 2934 ev_tstamp waittime = 0.;
2316 ev_tstamp sleeptime = 0.; 2935 ev_tstamp sleeptime = 0.;
2317 2936
2937 /* remember old timestamp for io_blocktime calculation */
2938 ev_tstamp prev_mn_now = mn_now;
2939
2940 /* update time to cancel out callback processing overhead */
2941 time_update (EV_A_ 1e100);
2942
2943 /* from now on, we want a pipe-wake-up */
2944 pipe_write_wanted = 1;
2945
2946 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2947
2318 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2948 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2319 { 2949 {
2320 /* remember old timestamp for io_blocktime calculation */
2321 ev_tstamp prev_mn_now = mn_now;
2322
2323 /* update time to cancel out callback processing overhead */
2324 time_update (EV_A_ 1e100);
2325
2326 waittime = MAX_BLOCKTIME; 2950 waittime = MAX_BLOCKTIME;
2327 2951
2328 if (timercnt) 2952 if (timercnt)
2329 { 2953 {
2330 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2954 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2331 if (waittime > to) waittime = to; 2955 if (waittime > to) waittime = to;
2332 } 2956 }
2333 2957
2334#if EV_PERIODIC_ENABLE 2958#if EV_PERIODIC_ENABLE
2335 if (periodiccnt) 2959 if (periodiccnt)
2336 { 2960 {
2337 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2961 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2338 if (waittime > to) waittime = to; 2962 if (waittime > to) waittime = to;
2339 } 2963 }
2340#endif 2964#endif
2341 2965
2342 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2966 /* don't let timeouts decrease the waittime below timeout_blocktime */
2343 if (expect_false (waittime < timeout_blocktime)) 2967 if (expect_false (waittime < timeout_blocktime))
2344 waittime = timeout_blocktime; 2968 waittime = timeout_blocktime;
2969
2970 /* at this point, we NEED to wait, so we have to ensure */
2971 /* to pass a minimum nonzero value to the backend */
2972 if (expect_false (waittime < backend_mintime))
2973 waittime = backend_mintime;
2345 2974
2346 /* extra check because io_blocktime is commonly 0 */ 2975 /* extra check because io_blocktime is commonly 0 */
2347 if (expect_false (io_blocktime)) 2976 if (expect_false (io_blocktime))
2348 { 2977 {
2349 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2978 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2350 2979
2351 if (sleeptime > waittime - backend_fudge) 2980 if (sleeptime > waittime - backend_mintime)
2352 sleeptime = waittime - backend_fudge; 2981 sleeptime = waittime - backend_mintime;
2353 2982
2354 if (expect_true (sleeptime > 0.)) 2983 if (expect_true (sleeptime > 0.))
2355 { 2984 {
2356 ev_sleep (sleeptime); 2985 ev_sleep (sleeptime);
2357 waittime -= sleeptime; 2986 waittime -= sleeptime;
2358 } 2987 }
2359 } 2988 }
2360 } 2989 }
2361 2990
2362#if EV_MINIMAL < 2 2991#if EV_FEATURE_API
2363 ++loop_count; 2992 ++loop_count;
2364#endif 2993#endif
2365 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2994 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2366 backend_poll (EV_A_ waittime); 2995 backend_poll (EV_A_ waittime);
2367 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2996 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2997
2998 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2999
3000 if (pipe_write_skipped)
3001 {
3002 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3003 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3004 }
3005
2368 3006
2369 /* update ev_rt_now, do magic */ 3007 /* update ev_rt_now, do magic */
2370 time_update (EV_A_ waittime + sleeptime); 3008 time_update (EV_A_ waittime + sleeptime);
2371 } 3009 }
2372 3010
… …
2379#if EV_IDLE_ENABLE 3017#if EV_IDLE_ENABLE
2380 /* queue idle watchers unless other events are pending */ 3018 /* queue idle watchers unless other events are pending */
2381 idle_reify (EV_A); 3019 idle_reify (EV_A);
2382#endif 3020#endif
2383 3021
3022#if EV_CHECK_ENABLE
2384 /* queue check watchers, to be executed first */ 3023 /* queue check watchers, to be executed first */
2385 if (expect_false (checkcnt)) 3024 if (expect_false (checkcnt))
2386 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3025 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3026#endif
2387 3027
2388 EV_INVOKE_PENDING; 3028 EV_INVOKE_PENDING;
2389 } 3029 }
2390 while (expect_true ( 3030 while (expect_true (
2391 activecnt 3031 activecnt
2392 && !loop_done 3032 && !loop_done
2393 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3033 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2394 )); 3034 ));
2395 3035
2396 if (loop_done == EVUNLOOP_ONE) 3036 if (loop_done == EVBREAK_ONE)
2397 loop_done = EVUNLOOP_CANCEL; 3037 loop_done = EVBREAK_CANCEL;
2398 3038
2399#if EV_MINIMAL < 2 3039#if EV_FEATURE_API
2400 --loop_depth; 3040 --loop_depth;
2401#endif 3041#endif
2402} 3042}
2403 3043
2404void 3044void
2405ev_unloop (EV_P_ int how) 3045ev_break (EV_P_ int how)
2406{ 3046{
2407 loop_done = how; 3047 loop_done = how;
2408} 3048}
2409 3049
2410void 3050void
… …
2558 EV_FREQUENT_CHECK; 3198 EV_FREQUENT_CHECK;
2559 3199
2560 wlist_del (&anfds[w->fd].head, (WL)w); 3200 wlist_del (&anfds[w->fd].head, (WL)w);
2561 ev_stop (EV_A_ (W)w); 3201 ev_stop (EV_A_ (W)w);
2562 3202
2563 fd_change (EV_A_ w->fd, 1); 3203 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2564 3204
2565 EV_FREQUENT_CHECK; 3205 EV_FREQUENT_CHECK;
2566} 3206}
2567 3207
2568void noinline 3208void noinline
… …
2660 if (w->reschedule_cb) 3300 if (w->reschedule_cb)
2661 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3301 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2662 else if (w->interval) 3302 else if (w->interval)
2663 { 3303 {
2664 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3304 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2665 /* this formula differs from the one in periodic_reify because we do not always round up */ 3305 periodic_recalc (EV_A_ w);
2666 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2667 } 3306 }
2668 else 3307 else
2669 ev_at (w) = w->offset; 3308 ev_at (w) = w->offset;
2670 3309
2671 EV_FREQUENT_CHECK; 3310 EV_FREQUENT_CHECK;
… …
2720#endif 3359#endif
2721 3360
2722#ifndef SA_RESTART 3361#ifndef SA_RESTART
2723# define SA_RESTART 0 3362# define SA_RESTART 0
2724#endif 3363#endif
3364
3365#if EV_SIGNAL_ENABLE
2725 3366
2726void noinline 3367void noinline
2727ev_signal_start (EV_P_ ev_signal *w) 3368ev_signal_start (EV_P_ ev_signal *w)
2728{ 3369{
2729 if (expect_false (ev_is_active (w))) 3370 if (expect_false (ev_is_active (w)))
… …
2790 sa.sa_handler = ev_sighandler; 3431 sa.sa_handler = ev_sighandler;
2791 sigfillset (&sa.sa_mask); 3432 sigfillset (&sa.sa_mask);
2792 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3433 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2793 sigaction (w->signum, &sa, 0); 3434 sigaction (w->signum, &sa, 0);
2794 3435
3436 if (origflags & EVFLAG_NOSIGMASK)
3437 {
2795 sigemptyset (&sa.sa_mask); 3438 sigemptyset (&sa.sa_mask);
2796 sigaddset (&sa.sa_mask, w->signum); 3439 sigaddset (&sa.sa_mask, w->signum);
2797 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3440 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3441 }
2798#endif 3442#endif
2799 } 3443 }
2800 3444
2801 EV_FREQUENT_CHECK; 3445 EV_FREQUENT_CHECK;
2802} 3446}
… …
2836 } 3480 }
2837 3481
2838 EV_FREQUENT_CHECK; 3482 EV_FREQUENT_CHECK;
2839} 3483}
2840 3484
3485#endif
3486
3487#if EV_CHILD_ENABLE
3488
2841void 3489void
2842ev_child_start (EV_P_ ev_child *w) 3490ev_child_start (EV_P_ ev_child *w)
2843{ 3491{
2844#if EV_MULTIPLICITY 3492#if EV_MULTIPLICITY
2845 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3493 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
… …
2848 return; 3496 return;
2849 3497
2850 EV_FREQUENT_CHECK; 3498 EV_FREQUENT_CHECK;
2851 3499
2852 ev_start (EV_A_ (W)w, 1); 3500 ev_start (EV_A_ (W)w, 1);
2853 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3501 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2854 3502
2855 EV_FREQUENT_CHECK; 3503 EV_FREQUENT_CHECK;
2856} 3504}
2857 3505
2858void 3506void
… …
2862 if (expect_false (!ev_is_active (w))) 3510 if (expect_false (!ev_is_active (w)))
2863 return; 3511 return;
2864 3512
2865 EV_FREQUENT_CHECK; 3513 EV_FREQUENT_CHECK;
2866 3514
2867 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3515 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2868 ev_stop (EV_A_ (W)w); 3516 ev_stop (EV_A_ (W)w);
2869 3517
2870 EV_FREQUENT_CHECK; 3518 EV_FREQUENT_CHECK;
2871} 3519}
3520
3521#endif
2872 3522
2873#if EV_STAT_ENABLE 3523#if EV_STAT_ENABLE
2874 3524
2875# ifdef _WIN32 3525# ifdef _WIN32
2876# undef lstat 3526# undef lstat
… …
2937 if (!pend || pend == path) 3587 if (!pend || pend == path)
2938 break; 3588 break;
2939 3589
2940 *pend = 0; 3590 *pend = 0;
2941 w->wd = inotify_add_watch (fs_fd, path, mask); 3591 w->wd = inotify_add_watch (fs_fd, path, mask);
2942 } 3592 }
2943 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3593 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2944 } 3594 }
2945 } 3595 }
2946 3596
2947 if (w->wd >= 0) 3597 if (w->wd >= 0)
2948 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3598 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2949 3599
2950 /* now re-arm timer, if required */ 3600 /* now re-arm timer, if required */
2951 if (ev_is_active (&w->timer)) ev_ref (EV_A); 3601 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2952 ev_timer_again (EV_A_ &w->timer); 3602 ev_timer_again (EV_A_ &w->timer);
2953 if (ev_is_active (&w->timer)) ev_unref (EV_A); 3603 if (ev_is_active (&w->timer)) ev_unref (EV_A);
… …
2961 3611
2962 if (wd < 0) 3612 if (wd < 0)
2963 return; 3613 return;
2964 3614
2965 w->wd = -2; 3615 w->wd = -2;
2966 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3616 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2967 wlist_del (&fs_hash [slot].head, (WL)w); 3617 wlist_del (&fs_hash [slot].head, (WL)w);
2968 3618
2969 /* remove this watcher, if others are watching it, they will rearm */ 3619 /* remove this watcher, if others are watching it, they will rearm */
2970 inotify_rm_watch (fs_fd, wd); 3620 inotify_rm_watch (fs_fd, wd);
2971} 3621}
… …
2973static void noinline 3623static void noinline
2974infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3624infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2975{ 3625{
2976 if (slot < 0) 3626 if (slot < 0)
2977 /* overflow, need to check for all hash slots */ 3627 /* overflow, need to check for all hash slots */
2978 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3628 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2979 infy_wd (EV_A_ slot, wd, ev); 3629 infy_wd (EV_A_ slot, wd, ev);
2980 else 3630 else
2981 { 3631 {
2982 WL w_; 3632 WL w_;
2983 3633
2984 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3634 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2985 { 3635 {
2986 ev_stat *w = (ev_stat *)w_; 3636 ev_stat *w = (ev_stat *)w_;
2987 w_ = w_->next; /* lets us remove this watcher and all before it */ 3637 w_ = w_->next; /* lets us remove this watcher and all before it */
2988 3638
2989 if (w->wd == wd || wd == -1) 3639 if (w->wd == wd || wd == -1)
2990 { 3640 {
2991 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3641 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2992 { 3642 {
2993 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3643 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2994 w->wd = -1; 3644 w->wd = -1;
2995 infy_add (EV_A_ w); /* re-add, no matter what */ 3645 infy_add (EV_A_ w); /* re-add, no matter what */
2996 } 3646 }
2997 3647
2998 stat_timer_cb (EV_A_ &w->timer, 0); 3648 stat_timer_cb (EV_A_ &w->timer, 0);
… …
3014 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3664 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3015 ofs += sizeof (struct inotify_event) + ev->len; 3665 ofs += sizeof (struct inotify_event) + ev->len;
3016 } 3666 }
3017} 3667}
3018 3668
3019inline_size unsigned int
3020ev_linux_version (void)
3021{
3022 struct utsname buf;
3023 unsigned int v;
3024 int i;
3025 char *p = buf.release;
3026
3027 if (uname (&buf))
3028 return 0;
3029
3030 for (i = 3+1; --i; )
3031 {
3032 unsigned int c = 0;
3033
3034 for (;;)
3035 {
3036 if (*p >= '0' && *p <= '9')
3037 c = c * 10 + *p++ - '0';
3038 else
3039 {
3040 p += *p == '.';
3041 break;
3042 }
3043 }
3044
3045 v = (v << 8) | c;
3046 }
3047
3048 return v;
3049}
3050
3051inline_size void 3669inline_size void ecb_cold
3052ev_check_2625 (EV_P) 3670ev_check_2625 (EV_P)
3053{ 3671{
3054 /* kernels < 2.6.25 are borked 3672 /* kernels < 2.6.25 are borked
3055 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3673 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3056 */ 3674 */
… …
3112 ev_io_set (&fs_w, fs_fd, EV_READ); 3730 ev_io_set (&fs_w, fs_fd, EV_READ);
3113 ev_io_start (EV_A_ &fs_w); 3731 ev_io_start (EV_A_ &fs_w);
3114 ev_unref (EV_A); 3732 ev_unref (EV_A);
3115 } 3733 }
3116 3734
3117 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3735 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3118 { 3736 {
3119 WL w_ = fs_hash [slot].head; 3737 WL w_ = fs_hash [slot].head;
3120 fs_hash [slot].head = 0; 3738 fs_hash [slot].head = 0;
3121 3739
3122 while (w_) 3740 while (w_)
… …
3297 3915
3298 EV_FREQUENT_CHECK; 3916 EV_FREQUENT_CHECK;
3299} 3917}
3300#endif 3918#endif
3301 3919
3920#if EV_PREPARE_ENABLE
3302void 3921void
3303ev_prepare_start (EV_P_ ev_prepare *w) 3922ev_prepare_start (EV_P_ ev_prepare *w)
3304{ 3923{
3305 if (expect_false (ev_is_active (w))) 3924 if (expect_false (ev_is_active (w)))
3306 return; 3925 return;
… …
3332 3951
3333 ev_stop (EV_A_ (W)w); 3952 ev_stop (EV_A_ (W)w);
3334 3953
3335 EV_FREQUENT_CHECK; 3954 EV_FREQUENT_CHECK;
3336} 3955}
3956#endif
3337 3957
3958#if EV_CHECK_ENABLE
3338void 3959void
3339ev_check_start (EV_P_ ev_check *w) 3960ev_check_start (EV_P_ ev_check *w)
3340{ 3961{
3341 if (expect_false (ev_is_active (w))) 3962 if (expect_false (ev_is_active (w)))
3342 return; 3963 return;
… …
3368 3989
3369 ev_stop (EV_A_ (W)w); 3990 ev_stop (EV_A_ (W)w);
3370 3991
3371 EV_FREQUENT_CHECK; 3992 EV_FREQUENT_CHECK;
3372} 3993}
3994#endif
3373 3995
3374#if EV_EMBED_ENABLE 3996#if EV_EMBED_ENABLE
3375void noinline 3997void noinline
3376ev_embed_sweep (EV_P_ ev_embed *w) 3998ev_embed_sweep (EV_P_ ev_embed *w)
3377{ 3999{
3378 ev_loop (w->other, EVLOOP_NONBLOCK); 4000 ev_run (w->other, EVRUN_NOWAIT);
3379} 4001}
3380 4002
3381static void 4003static void
3382embed_io_cb (EV_P_ ev_io *io, int revents) 4004embed_io_cb (EV_P_ ev_io *io, int revents)
3383{ 4005{
3384 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4006 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3385 4007
3386 if (ev_cb (w)) 4008 if (ev_cb (w))
3387 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4009 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3388 else 4010 else
3389 ev_loop (w->other, EVLOOP_NONBLOCK); 4011 ev_run (w->other, EVRUN_NOWAIT);
3390} 4012}
3391 4013
3392static void 4014static void
3393embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4015embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3394{ 4016{
… …
3398 EV_P = w->other; 4020 EV_P = w->other;
3399 4021
3400 while (fdchangecnt) 4022 while (fdchangecnt)
3401 { 4023 {
3402 fd_reify (EV_A); 4024 fd_reify (EV_A);
3403 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4025 ev_run (EV_A_ EVRUN_NOWAIT);
3404 } 4026 }
3405 } 4027 }
3406} 4028}
3407 4029
3408static void 4030static void
… …
3414 4036
3415 { 4037 {
3416 EV_P = w->other; 4038 EV_P = w->other;
3417 4039
3418 ev_loop_fork (EV_A); 4040 ev_loop_fork (EV_A);
3419 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4041 ev_run (EV_A_ EVRUN_NOWAIT);
3420 } 4042 }
3421 4043
3422 ev_embed_start (EV_A_ w); 4044 ev_embed_start (EV_A_ w);
3423} 4045}
3424 4046
… …
3516 4138
3517 EV_FREQUENT_CHECK; 4139 EV_FREQUENT_CHECK;
3518} 4140}
3519#endif 4141#endif
3520 4142
4143#if EV_CLEANUP_ENABLE
4144void
4145ev_cleanup_start (EV_P_ ev_cleanup *w)
4146{
4147 if (expect_false (ev_is_active (w)))
4148 return;
4149
4150 EV_FREQUENT_CHECK;
4151
4152 ev_start (EV_A_ (W)w, ++cleanupcnt);
4153 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4154 cleanups [cleanupcnt - 1] = w;
4155
4156 /* cleanup watchers should never keep a refcount on the loop */
4157 ev_unref (EV_A);
4158 EV_FREQUENT_CHECK;
4159}
4160
4161void
4162ev_cleanup_stop (EV_P_ ev_cleanup *w)
4163{
4164 clear_pending (EV_A_ (W)w);
4165 if (expect_false (!ev_is_active (w)))
4166 return;
4167
4168 EV_FREQUENT_CHECK;
4169 ev_ref (EV_A);
4170
4171 {
4172 int active = ev_active (w);
4173
4174 cleanups [active - 1] = cleanups [--cleanupcnt];
4175 ev_active (cleanups [active - 1]) = active;
4176 }
4177
4178 ev_stop (EV_A_ (W)w);
4179
4180 EV_FREQUENT_CHECK;
4181}
4182#endif
4183
3521#if EV_ASYNC_ENABLE 4184#if EV_ASYNC_ENABLE
3522void 4185void
3523ev_async_start (EV_P_ ev_async *w) 4186ev_async_start (EV_P_ ev_async *w)
3524{ 4187{
3525 if (expect_false (ev_is_active (w))) 4188 if (expect_false (ev_is_active (w)))
3526 return; 4189 return;
4190
4191 w->sent = 0;
3527 4192
3528 evpipe_init (EV_A); 4193 evpipe_init (EV_A);
3529 4194
3530 EV_FREQUENT_CHECK; 4195 EV_FREQUENT_CHECK;
3531 4196
… …
3609{ 4274{
3610 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4275 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3611 4276
3612 if (expect_false (!once)) 4277 if (expect_false (!once))
3613 { 4278 {
3614 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4279 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3615 return; 4280 return;
3616 } 4281 }
3617 4282
3618 once->cb = cb; 4283 once->cb = cb;
3619 once->arg = arg; 4284 once->arg = arg;
… …
3634} 4299}
3635 4300
3636/*****************************************************************************/ 4301/*****************************************************************************/
3637 4302
3638#if EV_WALK_ENABLE 4303#if EV_WALK_ENABLE
3639void 4304void ecb_cold
3640ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4305ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3641{ 4306{
3642 int i, j; 4307 int i, j;
3643 ev_watcher_list *wl, *wn; 4308 ev_watcher_list *wl, *wn;
3644 4309
… …
3688 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4353 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3689#endif 4354#endif
3690 4355
3691#if EV_IDLE_ENABLE 4356#if EV_IDLE_ENABLE
3692 if (types & EV_IDLE) 4357 if (types & EV_IDLE)
3693 for (j = NUMPRI; i--; ) 4358 for (j = NUMPRI; j--; )
3694 for (i = idlecnt [j]; i--; ) 4359 for (i = idlecnt [j]; i--; )
3695 cb (EV_A_ EV_IDLE, idles [j][i]); 4360 cb (EV_A_ EV_IDLE, idles [j][i]);
3696#endif 4361#endif
3697 4362
3698#if EV_FORK_ENABLE 4363#if EV_FORK_ENABLE
… …
3706 if (types & EV_ASYNC) 4371 if (types & EV_ASYNC)
3707 for (i = asynccnt; i--; ) 4372 for (i = asynccnt; i--; )
3708 cb (EV_A_ EV_ASYNC, asyncs [i]); 4373 cb (EV_A_ EV_ASYNC, asyncs [i]);
3709#endif 4374#endif
3710 4375
4376#if EV_PREPARE_ENABLE
3711 if (types & EV_PREPARE) 4377 if (types & EV_PREPARE)
3712 for (i = preparecnt; i--; ) 4378 for (i = preparecnt; i--; )
3713#if EV_EMBED_ENABLE 4379# if EV_EMBED_ENABLE
3714 if (ev_cb (prepares [i]) != embed_prepare_cb) 4380 if (ev_cb (prepares [i]) != embed_prepare_cb)
3715#endif 4381# endif
3716 cb (EV_A_ EV_PREPARE, prepares [i]); 4382 cb (EV_A_ EV_PREPARE, prepares [i]);
4383#endif
3717 4384
4385#if EV_CHECK_ENABLE
3718 if (types & EV_CHECK) 4386 if (types & EV_CHECK)
3719 for (i = checkcnt; i--; ) 4387 for (i = checkcnt; i--; )
3720 cb (EV_A_ EV_CHECK, checks [i]); 4388 cb (EV_A_ EV_CHECK, checks [i]);
4389#endif
3721 4390
4391#if EV_SIGNAL_ENABLE
3722 if (types & EV_SIGNAL) 4392 if (types & EV_SIGNAL)
3723 for (i = 0; i < EV_NSIG - 1; ++i) 4393 for (i = 0; i < EV_NSIG - 1; ++i)
3724 for (wl = signals [i].head; wl; ) 4394 for (wl = signals [i].head; wl; )
3725 { 4395 {
3726 wn = wl->next; 4396 wn = wl->next;
3727 cb (EV_A_ EV_SIGNAL, wl); 4397 cb (EV_A_ EV_SIGNAL, wl);
3728 wl = wn; 4398 wl = wn;
3729 } 4399 }
4400#endif
3730 4401
4402#if EV_CHILD_ENABLE
3731 if (types & EV_CHILD) 4403 if (types & EV_CHILD)
3732 for (i = EV_PID_HASHSIZE; i--; ) 4404 for (i = (EV_PID_HASHSIZE); i--; )
3733 for (wl = childs [i]; wl; ) 4405 for (wl = childs [i]; wl; )
3734 { 4406 {
3735 wn = wl->next; 4407 wn = wl->next;
3736 cb (EV_A_ EV_CHILD, wl); 4408 cb (EV_A_ EV_CHILD, wl);
3737 wl = wn; 4409 wl = wn;
3738 } 4410 }
4411#endif
3739/* EV_STAT 0x00001000 /* stat data changed */ 4412/* EV_STAT 0x00001000 /* stat data changed */
3740/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4413/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3741} 4414}
3742#endif 4415#endif
3743 4416
3744#if EV_MULTIPLICITY 4417#if EV_MULTIPLICITY
3745 #include "ev_wrap.h" 4418 #include "ev_wrap.h"
3746#endif 4419#endif
3747 4420
3748#ifdef __cplusplus 4421EV_CPP(})
3749}
3750#endif
3751 4422

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