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Comparing libev/ev.c (file contents):
Revision 1.331 by root, Tue Mar 9 08:55:03 2010 UTC vs.
Revision 1.402 by sf-exg, Tue Dec 20 10:34:10 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
… …
186# ifndef EV_SELECT_IS_WINSOCKET 196# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 197# define EV_SELECT_IS_WINSOCKET 1
188# endif 198# endif
189# undef EV_AVOID_STDIO 199# undef EV_AVOID_STDIO
190#endif 200#endif
201
202/* OS X, in its infinite idiocy, actually HARDCODES
203 * a limit of 1024 into their select. Where people have brains,
204 * OS X engineers apparently have a vacuum. Or maybe they were
205 * ordered to have a vacuum, or they do anything for money.
206 * This might help. Or not.
207 */
208#define _DARWIN_UNLIMITED_SELECT 1
191 209
192/* this block tries to deduce configuration from header-defined symbols and defaults */ 210/* this block tries to deduce configuration from header-defined symbols and defaults */
193 211
194/* try to deduce the maximum number of signals on this platform */ 212/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 213#if defined (EV_NSIG)
… …
207#elif defined (MAXSIG) 225#elif defined (MAXSIG)
208# define EV_NSIG (MAXSIG+1) 226# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG) 227#elif defined (MAX_SIG)
210# define EV_NSIG (MAX_SIG+1) 228# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE) 229#elif defined (SIGARRAYSIZE)
212# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 230# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig) 231#elif defined (_sys_nsig)
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 232# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else 233#else
216# error "unable to find value for NSIG, please report" 234# error "unable to find value for NSIG, please report"
217/* to make it compile regardless, just remove the above line */ 235/* to make it compile regardless, just remove the above line, */
236/* but consider reporting it, too! :) */
218# define EV_NSIG 65 237# define EV_NSIG 65
238#endif
239
240#ifndef EV_USE_FLOOR
241# define EV_USE_FLOOR 0
219#endif 242#endif
220 243
221#ifndef EV_USE_CLOCK_SYSCALL 244#ifndef EV_USE_CLOCK_SYSCALL
222# if __linux && __GLIBC__ >= 2 245# if __linux && __GLIBC__ >= 2
223# define EV_USE_CLOCK_SYSCALL 1 246# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
224# else 247# else
225# define EV_USE_CLOCK_SYSCALL 0 248# define EV_USE_CLOCK_SYSCALL 0
226# endif 249# endif
227#endif 250#endif
228 251
229#ifndef EV_USE_MONOTONIC 252#ifndef EV_USE_MONOTONIC
230# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 253# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
231# define EV_USE_MONOTONIC 1 254# define EV_USE_MONOTONIC EV_FEATURE_OS
232# else 255# else
233# define EV_USE_MONOTONIC 0 256# define EV_USE_MONOTONIC 0
234# endif 257# endif
235#endif 258#endif
236 259
… …
238# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 261# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
239#endif 262#endif
240 263
241#ifndef EV_USE_NANOSLEEP 264#ifndef EV_USE_NANOSLEEP
242# if _POSIX_C_SOURCE >= 199309L 265# if _POSIX_C_SOURCE >= 199309L
243# define EV_USE_NANOSLEEP 1 266# define EV_USE_NANOSLEEP EV_FEATURE_OS
244# else 267# else
245# define EV_USE_NANOSLEEP 0 268# define EV_USE_NANOSLEEP 0
246# endif 269# endif
247#endif 270#endif
248 271
249#ifndef EV_USE_SELECT 272#ifndef EV_USE_SELECT
250# define EV_USE_SELECT 1 273# define EV_USE_SELECT EV_FEATURE_BACKENDS
251#endif 274#endif
252 275
253#ifndef EV_USE_POLL 276#ifndef EV_USE_POLL
254# ifdef _WIN32 277# ifdef _WIN32
255# define EV_USE_POLL 0 278# define EV_USE_POLL 0
256# else 279# else
257# define EV_USE_POLL 1 280# define EV_USE_POLL EV_FEATURE_BACKENDS
258# endif 281# endif
259#endif 282#endif
260 283
261#ifndef EV_USE_EPOLL 284#ifndef EV_USE_EPOLL
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 285# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
263# define EV_USE_EPOLL 1 286# define EV_USE_EPOLL EV_FEATURE_BACKENDS
264# else 287# else
265# define EV_USE_EPOLL 0 288# define EV_USE_EPOLL 0
266# endif 289# endif
267#endif 290#endif
268 291
… …
274# define EV_USE_PORT 0 297# define EV_USE_PORT 0
275#endif 298#endif
276 299
277#ifndef EV_USE_INOTIFY 300#ifndef EV_USE_INOTIFY
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_INOTIFY 1 302# define EV_USE_INOTIFY EV_FEATURE_OS
280# else 303# else
281# define EV_USE_INOTIFY 0 304# define EV_USE_INOTIFY 0
282# endif 305# endif
283#endif 306#endif
284 307
285#ifndef EV_PID_HASHSIZE 308#ifndef EV_PID_HASHSIZE
286# if EV_MINIMAL 309# 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 310#endif
292 311
293#ifndef EV_INOTIFY_HASHSIZE 312#ifndef EV_INOTIFY_HASHSIZE
294# if EV_MINIMAL 313# 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 314#endif
300 315
301#ifndef EV_USE_EVENTFD 316#ifndef EV_USE_EVENTFD
302# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 317# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
303# define EV_USE_EVENTFD 1 318# define EV_USE_EVENTFD EV_FEATURE_OS
304# else 319# else
305# define EV_USE_EVENTFD 0 320# define EV_USE_EVENTFD 0
306# endif 321# endif
307#endif 322#endif
308 323
309#ifndef EV_USE_SIGNALFD 324#ifndef EV_USE_SIGNALFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 325# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_SIGNALFD 1 326# define EV_USE_SIGNALFD EV_FEATURE_OS
312# else 327# else
313# define EV_USE_SIGNALFD 0 328# define EV_USE_SIGNALFD 0
314# endif 329# endif
315#endif 330#endif
316 331
… …
319# define EV_USE_4HEAP 1 334# define EV_USE_4HEAP 1
320# define EV_HEAP_CACHE_AT 1 335# define EV_HEAP_CACHE_AT 1
321#endif 336#endif
322 337
323#ifndef EV_VERIFY 338#ifndef EV_VERIFY
324# define EV_VERIFY !EV_MINIMAL 339# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
325#endif 340#endif
326 341
327#ifndef EV_USE_4HEAP 342#ifndef EV_USE_4HEAP
328# define EV_USE_4HEAP !EV_MINIMAL 343# define EV_USE_4HEAP EV_FEATURE_DATA
329#endif 344#endif
330 345
331#ifndef EV_HEAP_CACHE_AT 346#ifndef EV_HEAP_CACHE_AT
332# define EV_HEAP_CACHE_AT !EV_MINIMAL 347# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
333#endif 348#endif
334 349
335/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 350/* 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. */ 351/* which makes programs even slower. might work on other unices, too. */
337#if EV_USE_CLOCK_SYSCALL 352#if EV_USE_CLOCK_SYSCALL
… …
368# undef EV_USE_INOTIFY 383# undef EV_USE_INOTIFY
369# define EV_USE_INOTIFY 0 384# define EV_USE_INOTIFY 0
370#endif 385#endif
371 386
372#if !EV_USE_NANOSLEEP 387#if !EV_USE_NANOSLEEP
373# ifndef _WIN32 388/* hp-ux has it in sys/time.h, which we unconditionally include above */
389# if !defined(_WIN32) && !defined(__hpux)
374# include <sys/select.h> 390# include <sys/select.h>
375# endif 391# endif
376#endif 392#endif
377 393
378#if EV_USE_INOTIFY 394#if EV_USE_INOTIFY
379# include <sys/utsname.h>
380# include <sys/statfs.h> 395# include <sys/statfs.h>
381# include <sys/inotify.h> 396# include <sys/inotify.h>
382/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 397/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
383# ifndef IN_DONT_FOLLOW 398# ifndef IN_DONT_FOLLOW
384# undef EV_USE_INOTIFY 399# undef EV_USE_INOTIFY
… …
401# define EFD_CLOEXEC O_CLOEXEC 416# define EFD_CLOEXEC O_CLOEXEC
402# else 417# else
403# define EFD_CLOEXEC 02000000 418# define EFD_CLOEXEC 02000000
404# endif 419# endif
405# endif 420# endif
406# ifdef __cplusplus
407extern "C" {
408# endif
409int (eventfd) (unsigned int initval, int flags); 421EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
410# ifdef __cplusplus
411}
412# endif
413#endif 422#endif
414 423
415#if EV_USE_SIGNALFD 424#if EV_USE_SIGNALFD
416/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 425/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
417# include <stdint.h> 426# include <stdint.h>
… …
423# define SFD_CLOEXEC O_CLOEXEC 432# define SFD_CLOEXEC O_CLOEXEC
424# else 433# else
425# define SFD_CLOEXEC 02000000 434# define SFD_CLOEXEC 02000000
426# endif 435# endif
427# endif 436# endif
428# ifdef __cplusplus
429extern "C" {
430# endif
431int signalfd (int fd, const sigset_t *mask, int flags); 437EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
432 438
433struct signalfd_siginfo 439struct signalfd_siginfo
434{ 440{
435 uint32_t ssi_signo; 441 uint32_t ssi_signo;
436 char pad[128 - sizeof (uint32_t)]; 442 char pad[128 - sizeof (uint32_t)];
437}; 443};
438# ifdef __cplusplus
439}
440# endif 444#endif
441#endif
442
443 445
444/**/ 446/**/
445 447
446#if EV_VERIFY >= 3 448#if EV_VERIFY >= 3
447# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 449# define EV_FREQUENT_CHECK ev_verify (EV_A)
448#else 450#else
449# define EV_FREQUENT_CHECK do { } while (0) 451# define EV_FREQUENT_CHECK do { } while (0)
450#endif 452#endif
451 453
452/* 454/*
453 * This is used to avoid floating point rounding problems. 455 * 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. 456 * This value is good at least till the year 4000.
458 * Better solutions welcome.
459 */ 457 */
460#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 458#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
459/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
461 460
462#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 461#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) */ 462#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
464 463
464#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
465#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
466
467/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
468/* ECB.H BEGIN */
469/*
470 * libecb - http://software.schmorp.de/pkg/libecb
471 *
472 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
473 * Copyright (©) 2011 Emanuele Giaquinta
474 * All rights reserved.
475 *
476 * Redistribution and use in source and binary forms, with or without modifica-
477 * tion, are permitted provided that the following conditions are met:
478 *
479 * 1. Redistributions of source code must retain the above copyright notice,
480 * this list of conditions and the following disclaimer.
481 *
482 * 2. Redistributions in binary form must reproduce the above copyright
483 * notice, this list of conditions and the following disclaimer in the
484 * documentation and/or other materials provided with the distribution.
485 *
486 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
487 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
488 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
489 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
490 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
491 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
492 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
493 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
494 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
495 * OF THE POSSIBILITY OF SUCH DAMAGE.
496 */
497
498#ifndef ECB_H
499#define ECB_H
500
501#ifdef _WIN32
502 typedef signed char int8_t;
503 typedef unsigned char uint8_t;
504 typedef signed short int16_t;
505 typedef unsigned short uint16_t;
506 typedef signed int int32_t;
507 typedef unsigned int uint32_t;
465#if __GNUC__ >= 4 508 #if __GNUC__
466# define expect(expr,value) __builtin_expect ((expr),(value)) 509 typedef signed long long int64_t;
467# define noinline __attribute__ ((noinline)) 510 typedef unsigned long long uint64_t;
511 #else /* _MSC_VER || __BORLANDC__ */
512 typedef signed __int64 int64_t;
513 typedef unsigned __int64 uint64_t;
514 #endif
468#else 515#else
469# define expect(expr,value) (expr) 516 #include <inttypes.h>
470# define noinline
471# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
472# define inline
473# endif 517#endif
518
519/* many compilers define _GNUC_ to some versions but then only implement
520 * what their idiot authors think are the "more important" extensions,
521 * causing enormous grief in return for some better fake benchmark numbers.
522 * or so.
523 * we try to detect these and simply assume they are not gcc - if they have
524 * an issue with that they should have done it right in the first place.
525 */
526#ifndef ECB_GCC_VERSION
527 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
528 #define ECB_GCC_VERSION(major,minor) 0
529 #else
530 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
474#endif 531 #endif
532#endif
475 533
534/*****************************************************************************/
535
536/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
537/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
538
539#if ECB_NO_THREADS || ECB_NO_SMP
540 #define ECB_MEMORY_FENCE do { } while (0)
541#endif
542
543#ifndef ECB_MEMORY_FENCE
544 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__)
545 #if __i386__
546 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
547 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
548 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
549 #elif __amd64
550 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
551 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
552 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
553 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
555 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
556 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
557 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
558 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
559 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
560 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
561 #endif
562 #endif
563#endif
564
565#ifndef ECB_MEMORY_FENCE
566 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
567 #define ECB_MEMORY_FENCE __sync_synchronize ()
568 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
569 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
570 #elif _MSC_VER >= 1400 /* VC++ 2005 */
571 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
572 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
573 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
574 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
575 #elif defined(_WIN32)
576 #include <WinNT.h>
577 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
578 #endif
579#endif
580
581#ifndef ECB_MEMORY_FENCE
582 #if !ECB_AVOID_PTHREADS
583 /*
584 * if you get undefined symbol references to pthread_mutex_lock,
585 * or failure to find pthread.h, then you should implement
586 * the ECB_MEMORY_FENCE operations for your cpu/compiler
587 * OR provide pthread.h and link against the posix thread library
588 * of your system.
589 */
590 #include <pthread.h>
591 #define ECB_NEEDS_PTHREADS 1
592 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
593
594 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
595 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
596 #endif
597#endif
598
599#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
600 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
601#endif
602
603#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
604 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
605#endif
606
607/*****************************************************************************/
608
609#define ECB_C99 (__STDC_VERSION__ >= 199901L)
610
611#if __cplusplus
612 #define ecb_inline static inline
613#elif ECB_GCC_VERSION(2,5)
614 #define ecb_inline static __inline__
615#elif ECB_C99
616 #define ecb_inline static inline
617#else
618 #define ecb_inline static
619#endif
620
621#if ECB_GCC_VERSION(3,3)
622 #define ecb_restrict __restrict__
623#elif ECB_C99
624 #define ecb_restrict restrict
625#else
626 #define ecb_restrict
627#endif
628
629typedef int ecb_bool;
630
631#define ECB_CONCAT_(a, b) a ## b
632#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
633#define ECB_STRINGIFY_(a) # a
634#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
635
636#define ecb_function_ ecb_inline
637
638#if ECB_GCC_VERSION(3,1)
639 #define ecb_attribute(attrlist) __attribute__(attrlist)
640 #define ecb_is_constant(expr) __builtin_constant_p (expr)
641 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
642 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
643#else
644 #define ecb_attribute(attrlist)
645 #define ecb_is_constant(expr) 0
646 #define ecb_expect(expr,value) (expr)
647 #define ecb_prefetch(addr,rw,locality)
648#endif
649
650/* no emulation for ecb_decltype */
651#if ECB_GCC_VERSION(4,5)
652 #define ecb_decltype(x) __decltype(x)
653#elif ECB_GCC_VERSION(3,0)
654 #define ecb_decltype(x) __typeof(x)
655#endif
656
657#define ecb_noinline ecb_attribute ((__noinline__))
658#define ecb_noreturn ecb_attribute ((__noreturn__))
659#define ecb_unused ecb_attribute ((__unused__))
660#define ecb_const ecb_attribute ((__const__))
661#define ecb_pure ecb_attribute ((__pure__))
662
663#if ECB_GCC_VERSION(4,3)
664 #define ecb_artificial ecb_attribute ((__artificial__))
665 #define ecb_hot ecb_attribute ((__hot__))
666 #define ecb_cold ecb_attribute ((__cold__))
667#else
668 #define ecb_artificial
669 #define ecb_hot
670 #define ecb_cold
671#endif
672
673/* put around conditional expressions if you are very sure that the */
674/* expression is mostly true or mostly false. note that these return */
675/* booleans, not the expression. */
476#define expect_false(expr) expect ((expr) != 0, 0) 676#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
477#define expect_true(expr) expect ((expr) != 0, 1) 677#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
678/* for compatibility to the rest of the world */
679#define ecb_likely(expr) ecb_expect_true (expr)
680#define ecb_unlikely(expr) ecb_expect_false (expr)
681
682/* count trailing zero bits and count # of one bits */
683#if ECB_GCC_VERSION(3,4)
684 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
685 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
686 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
687 #define ecb_ctz32(x) __builtin_ctz (x)
688 #define ecb_ctz64(x) __builtin_ctzll (x)
689 #define ecb_popcount32(x) __builtin_popcount (x)
690 /* no popcountll */
691#else
692 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
693 ecb_function_ int
694 ecb_ctz32 (uint32_t x)
695 {
696 int r = 0;
697
698 x &= ~x + 1; /* this isolates the lowest bit */
699
700#if ECB_branchless_on_i386
701 r += !!(x & 0xaaaaaaaa) << 0;
702 r += !!(x & 0xcccccccc) << 1;
703 r += !!(x & 0xf0f0f0f0) << 2;
704 r += !!(x & 0xff00ff00) << 3;
705 r += !!(x & 0xffff0000) << 4;
706#else
707 if (x & 0xaaaaaaaa) r += 1;
708 if (x & 0xcccccccc) r += 2;
709 if (x & 0xf0f0f0f0) r += 4;
710 if (x & 0xff00ff00) r += 8;
711 if (x & 0xffff0000) r += 16;
712#endif
713
714 return r;
715 }
716
717 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
718 ecb_function_ int
719 ecb_ctz64 (uint64_t x)
720 {
721 int shift = x & 0xffffffffU ? 0 : 32;
722 return ecb_ctz32 (x >> shift) + shift;
723 }
724
725 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
726 ecb_function_ int
727 ecb_popcount32 (uint32_t x)
728 {
729 x -= (x >> 1) & 0x55555555;
730 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
731 x = ((x >> 4) + x) & 0x0f0f0f0f;
732 x *= 0x01010101;
733
734 return x >> 24;
735 }
736
737 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
738 ecb_function_ int ecb_ld32 (uint32_t x)
739 {
740 int r = 0;
741
742 if (x >> 16) { x >>= 16; r += 16; }
743 if (x >> 8) { x >>= 8; r += 8; }
744 if (x >> 4) { x >>= 4; r += 4; }
745 if (x >> 2) { x >>= 2; r += 2; }
746 if (x >> 1) { r += 1; }
747
748 return r;
749 }
750
751 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
752 ecb_function_ int ecb_ld64 (uint64_t x)
753 {
754 int r = 0;
755
756 if (x >> 32) { x >>= 32; r += 32; }
757
758 return r + ecb_ld32 (x);
759 }
760#endif
761
762/* popcount64 is only available on 64 bit cpus as gcc builtin */
763/* so for this version we are lazy */
764ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
765ecb_function_ int
766ecb_popcount64 (uint64_t x)
767{
768 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
769}
770
771ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
772ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
773ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
774ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
775ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
776ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
777ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
778ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
779
780ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
781ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
782ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
783ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
784ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
785ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
786ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
787ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
788
789#if ECB_GCC_VERSION(4,3)
790 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
791 #define ecb_bswap32(x) __builtin_bswap32 (x)
792 #define ecb_bswap64(x) __builtin_bswap64 (x)
793#else
794 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
795 ecb_function_ uint16_t
796 ecb_bswap16 (uint16_t x)
797 {
798 return ecb_rotl16 (x, 8);
799 }
800
801 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
802 ecb_function_ uint32_t
803 ecb_bswap32 (uint32_t x)
804 {
805 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
806 }
807
808 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
809 ecb_function_ uint64_t
810 ecb_bswap64 (uint64_t x)
811 {
812 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
813 }
814#endif
815
816#if ECB_GCC_VERSION(4,5)
817 #define ecb_unreachable() __builtin_unreachable ()
818#else
819 /* this seems to work fine, but gcc always emits a warning for it :/ */
820 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
821 ecb_function_ void ecb_unreachable (void) { }
822#endif
823
824/* try to tell the compiler that some condition is definitely true */
825#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
826
827ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
828ecb_function_ unsigned char
829ecb_byteorder_helper (void)
830{
831 const uint32_t u = 0x11223344;
832 return *(unsigned char *)&u;
833}
834
835ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
836ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
837ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
839
840#if ECB_GCC_VERSION(3,0) || ECB_C99
841 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
842#else
843 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
844#endif
845
846#if __cplusplus
847 template<typename T>
848 static inline T ecb_div_rd (T val, T div)
849 {
850 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
851 }
852 template<typename T>
853 static inline T ecb_div_ru (T val, T div)
854 {
855 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
856 }
857#else
858 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
859 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
860#endif
861
862#if ecb_cplusplus_does_not_suck
863 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
864 template<typename T, int N>
865 static inline int ecb_array_length (const T (&arr)[N])
866 {
867 return N;
868 }
869#else
870 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
871#endif
872
873#endif
874
875/* ECB.H END */
876
877#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
878/* if your architecture doesn't need memory fences, e.g. because it is
879 * single-cpu/core, or if you use libev in a project that doesn't use libev
880 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
881 * libev, in which cases the memory fences become nops.
882 * alternatively, you can remove this #error and link against libpthread,
883 * which will then provide the memory fences.
884 */
885# error "memory fences not defined for your architecture, please report"
886#endif
887
888#ifndef ECB_MEMORY_FENCE
889# define ECB_MEMORY_FENCE do { } while (0)
890# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
891# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
892#endif
893
894#define expect_false(cond) ecb_expect_false (cond)
895#define expect_true(cond) ecb_expect_true (cond)
896#define noinline ecb_noinline
897
478#define inline_size static inline 898#define inline_size ecb_inline
479 899
480#if EV_MINIMAL 900#if EV_FEATURE_CODE
901# define inline_speed ecb_inline
902#else
481# define inline_speed static noinline 903# define inline_speed static noinline
482#else
483# define inline_speed static inline
484#endif 904#endif
485 905
486#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 906#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
487 907
488#if EV_MINPRI == EV_MAXPRI 908#if EV_MINPRI == EV_MAXPRI
… …
501#define ev_active(w) ((W)(w))->active 921#define ev_active(w) ((W)(w))->active
502#define ev_at(w) ((WT)(w))->at 922#define ev_at(w) ((WT)(w))->at
503 923
504#if EV_USE_REALTIME 924#if EV_USE_REALTIME
505/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 925/* 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 */ 926/* giving it a reasonably high chance of working on typical architectures */
507static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 927static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
508#endif 928#endif
509 929
510#if EV_USE_MONOTONIC 930#if EV_USE_MONOTONIC
511static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 931static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
525# include "ev_win32.c" 945# include "ev_win32.c"
526#endif 946#endif
527 947
528/*****************************************************************************/ 948/*****************************************************************************/
529 949
950/* define a suitable floor function (only used by periodics atm) */
951
952#if EV_USE_FLOOR
953# include <math.h>
954# define ev_floor(v) floor (v)
955#else
956
957#include <float.h>
958
959/* a floor() replacement function, should be independent of ev_tstamp type */
960static ev_tstamp noinline
961ev_floor (ev_tstamp v)
962{
963 /* the choice of shift factor is not terribly important */
964#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
965 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
966#else
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
968#endif
969
970 /* argument too large for an unsigned long? */
971 if (expect_false (v >= shift))
972 {
973 ev_tstamp f;
974
975 if (v == v - 1.)
976 return v; /* very large number */
977
978 f = shift * ev_floor (v * (1. / shift));
979 return f + ev_floor (v - f);
980 }
981
982 /* special treatment for negative args? */
983 if (expect_false (v < 0.))
984 {
985 ev_tstamp f = -ev_floor (-v);
986
987 return f - (f == v ? 0 : 1);
988 }
989
990 /* fits into an unsigned long */
991 return (unsigned long)v;
992}
993
994#endif
995
996/*****************************************************************************/
997
998#ifdef __linux
999# include <sys/utsname.h>
1000#endif
1001
1002static unsigned int noinline ecb_cold
1003ev_linux_version (void)
1004{
1005#ifdef __linux
1006 unsigned int v = 0;
1007 struct utsname buf;
1008 int i;
1009 char *p = buf.release;
1010
1011 if (uname (&buf))
1012 return 0;
1013
1014 for (i = 3+1; --i; )
1015 {
1016 unsigned int c = 0;
1017
1018 for (;;)
1019 {
1020 if (*p >= '0' && *p <= '9')
1021 c = c * 10 + *p++ - '0';
1022 else
1023 {
1024 p += *p == '.';
1025 break;
1026 }
1027 }
1028
1029 v = (v << 8) | c;
1030 }
1031
1032 return v;
1033#else
1034 return 0;
1035#endif
1036}
1037
1038/*****************************************************************************/
1039
530#if EV_AVOID_STDIO 1040#if EV_AVOID_STDIO
531static void noinline 1041static void noinline ecb_cold
532ev_printerr (const char *msg) 1042ev_printerr (const char *msg)
533{ 1043{
534 write (STDERR_FILENO, msg, strlen (msg)); 1044 write (STDERR_FILENO, msg, strlen (msg));
535} 1045}
536#endif 1046#endif
537 1047
538static void (*syserr_cb)(const char *msg); 1048static void (*syserr_cb)(const char *msg);
539 1049
540void 1050void ecb_cold
541ev_set_syserr_cb (void (*cb)(const char *msg)) 1051ev_set_syserr_cb (void (*cb)(const char *msg))
542{ 1052{
543 syserr_cb = cb; 1053 syserr_cb = cb;
544} 1054}
545 1055
546static void noinline 1056static void noinline ecb_cold
547ev_syserr (const char *msg) 1057ev_syserr (const char *msg)
548{ 1058{
549 if (!msg) 1059 if (!msg)
550 msg = "(libev) system error"; 1060 msg = "(libev) system error";
551 1061
552 if (syserr_cb) 1062 if (syserr_cb)
553 syserr_cb (msg); 1063 syserr_cb (msg);
554 else 1064 else
555 { 1065 {
556#if EV_AVOID_STDIO 1066#if EV_AVOID_STDIO
557 const char *err = strerror (errno);
558
559 ev_printerr (msg); 1067 ev_printerr (msg);
560 ev_printerr (": "); 1068 ev_printerr (": ");
561 ev_printerr (err); 1069 ev_printerr (strerror (errno));
562 ev_printerr ("\n"); 1070 ev_printerr ("\n");
563#else 1071#else
564 perror (msg); 1072 perror (msg);
565#endif 1073#endif
566 abort (); 1074 abort ();
… …
568} 1076}
569 1077
570static void * 1078static void *
571ev_realloc_emul (void *ptr, long size) 1079ev_realloc_emul (void *ptr, long size)
572{ 1080{
1081#if __GLIBC__
1082 return realloc (ptr, size);
1083#else
573 /* some systems, notably openbsd and darwin, fail to properly 1084 /* some systems, notably openbsd and darwin, fail to properly
574 * implement realloc (x, 0) (as required by both ansi c-98 and 1085 * implement realloc (x, 0) (as required by both ansi c-89 and
575 * the single unix specification, so work around them here. 1086 * the single unix specification, so work around them here.
576 */ 1087 */
577 1088
578 if (size) 1089 if (size)
579 return realloc (ptr, size); 1090 return realloc (ptr, size);
580 1091
581 free (ptr); 1092 free (ptr);
582 return 0; 1093 return 0;
1094#endif
583} 1095}
584 1096
585static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1097static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
586 1098
587void 1099void ecb_cold
588ev_set_allocator (void *(*cb)(void *ptr, long size)) 1100ev_set_allocator (void *(*cb)(void *ptr, long size))
589{ 1101{
590 alloc = cb; 1102 alloc = cb;
591} 1103}
592 1104
… …
596 ptr = alloc (ptr, size); 1108 ptr = alloc (ptr, size);
597 1109
598 if (!ptr && size) 1110 if (!ptr && size)
599 { 1111 {
600#if EV_AVOID_STDIO 1112#if EV_AVOID_STDIO
601 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1113 ev_printerr ("(libev) memory allocation failed, aborting.\n");
602#else 1114#else
603 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1115 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
604#endif 1116#endif
605 abort (); 1117 abort ();
606 } 1118 }
607 1119
608 return ptr; 1120 return ptr;
… …
625 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1137 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
626 unsigned char unused; 1138 unsigned char unused;
627#if EV_USE_EPOLL 1139#if EV_USE_EPOLL
628 unsigned int egen; /* generation counter to counter epoll bugs */ 1140 unsigned int egen; /* generation counter to counter epoll bugs */
629#endif 1141#endif
630#if EV_SELECT_IS_WINSOCKET 1142#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
631 SOCKET handle; 1143 SOCKET handle;
1144#endif
1145#if EV_USE_IOCP
1146 OVERLAPPED or, ow;
632#endif 1147#endif
633} ANFD; 1148} ANFD;
634 1149
635/* stores the pending event set for a given watcher */ 1150/* stores the pending event set for a given watcher */
636typedef struct 1151typedef struct
… …
678 #undef VAR 1193 #undef VAR
679 }; 1194 };
680 #include "ev_wrap.h" 1195 #include "ev_wrap.h"
681 1196
682 static struct ev_loop default_loop_struct; 1197 static struct ev_loop default_loop_struct;
683 struct ev_loop *ev_default_loop_ptr; 1198 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
684 1199
685#else 1200#else
686 1201
687 ev_tstamp ev_rt_now; 1202 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
688 #define VAR(name,decl) static decl; 1203 #define VAR(name,decl) static decl;
689 #include "ev_vars.h" 1204 #include "ev_vars.h"
690 #undef VAR 1205 #undef VAR
691 1206
692 static int ev_default_loop_ptr; 1207 static int ev_default_loop_ptr;
693 1208
694#endif 1209#endif
695 1210
696#if EV_MINIMAL < 2 1211#if EV_FEATURE_API
697# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1212# 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) 1213# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
699# define EV_INVOKE_PENDING invoke_cb (EV_A) 1214# define EV_INVOKE_PENDING invoke_cb (EV_A)
700#else 1215#else
701# define EV_RELEASE_CB (void)0 1216# define EV_RELEASE_CB (void)0
702# define EV_ACQUIRE_CB (void)0 1217# define EV_ACQUIRE_CB (void)0
703# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1218# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
704#endif 1219#endif
705 1220
706#define EVUNLOOP_RECURSE 0x80 1221#define EVBREAK_RECURSE 0x80
707 1222
708/*****************************************************************************/ 1223/*****************************************************************************/
709 1224
710#ifndef EV_HAVE_EV_TIME 1225#ifndef EV_HAVE_EV_TIME
711ev_tstamp 1226ev_tstamp
… …
755 if (delay > 0.) 1270 if (delay > 0.)
756 { 1271 {
757#if EV_USE_NANOSLEEP 1272#if EV_USE_NANOSLEEP
758 struct timespec ts; 1273 struct timespec ts;
759 1274
760 ts.tv_sec = (time_t)delay; 1275 EV_TS_SET (ts, delay);
761 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
762
763 nanosleep (&ts, 0); 1276 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1277#elif defined(_WIN32)
765 Sleep ((unsigned long)(delay * 1e3)); 1278 Sleep ((unsigned long)(delay * 1e3));
766#else 1279#else
767 struct timeval tv; 1280 struct timeval tv;
768 1281
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 */ 1282 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
773 /* something not guaranteed by newer posix versions, but guaranteed */ 1283 /* something not guaranteed by newer posix versions, but guaranteed */
774 /* by older ones */ 1284 /* by older ones */
1285 EV_TV_SET (tv, delay);
775 select (0, 0, 0, 0, &tv); 1286 select (0, 0, 0, 0, &tv);
776#endif 1287#endif
777 } 1288 }
778} 1289}
779 1290
780/*****************************************************************************/ 1291/*****************************************************************************/
781 1292
782#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1293#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
783 1294
784/* find a suitable new size for the given array, */ 1295/* find a suitable new size for the given array, */
785/* hopefully by rounding to a ncie-to-malloc size */ 1296/* hopefully by rounding to a nice-to-malloc size */
786inline_size int 1297inline_size int
787array_nextsize (int elem, int cur, int cnt) 1298array_nextsize (int elem, int cur, int cnt)
788{ 1299{
789 int ncur = cur + 1; 1300 int ncur = cur + 1;
790 1301
791 do 1302 do
792 ncur <<= 1; 1303 ncur <<= 1;
793 while (cnt > ncur); 1304 while (cnt > ncur);
794 1305
795 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1306 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
796 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1307 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
797 { 1308 {
798 ncur *= elem; 1309 ncur *= elem;
799 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1310 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
800 ncur = ncur - sizeof (void *) * 4; 1311 ncur = ncur - sizeof (void *) * 4;
… …
802 } 1313 }
803 1314
804 return ncur; 1315 return ncur;
805} 1316}
806 1317
807static noinline void * 1318static void * noinline ecb_cold
808array_realloc (int elem, void *base, int *cur, int cnt) 1319array_realloc (int elem, void *base, int *cur, int cnt)
809{ 1320{
810 *cur = array_nextsize (elem, *cur, cnt); 1321 *cur = array_nextsize (elem, *cur, cnt);
811 return ev_realloc (base, elem * *cur); 1322 return ev_realloc (base, elem * *cur);
812} 1323}
… …
815 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1326 memset ((void *)(base), 0, sizeof (*(base)) * (count))
816 1327
817#define array_needsize(type,base,cur,cnt,init) \ 1328#define array_needsize(type,base,cur,cnt,init) \
818 if (expect_false ((cnt) > (cur))) \ 1329 if (expect_false ((cnt) > (cur))) \
819 { \ 1330 { \
820 int ocur_ = (cur); \ 1331 int ecb_unused ocur_ = (cur); \
821 (base) = (type *)array_realloc \ 1332 (base) = (type *)array_realloc \
822 (sizeof (type), (base), &(cur), (cnt)); \ 1333 (sizeof (type), (base), &(cur), (cnt)); \
823 init ((base) + (ocur_), (cur) - ocur_); \ 1334 init ((base) + (ocur_), (cur) - ocur_); \
824 } 1335 }
825 1336
… …
886} 1397}
887 1398
888/*****************************************************************************/ 1399/*****************************************************************************/
889 1400
890inline_speed void 1401inline_speed void
891fd_event_nc (EV_P_ int fd, int revents) 1402fd_event_nocheck (EV_P_ int fd, int revents)
892{ 1403{
893 ANFD *anfd = anfds + fd; 1404 ANFD *anfd = anfds + fd;
894 ev_io *w; 1405 ev_io *w;
895 1406
896 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1407 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
908fd_event (EV_P_ int fd, int revents) 1419fd_event (EV_P_ int fd, int revents)
909{ 1420{
910 ANFD *anfd = anfds + fd; 1421 ANFD *anfd = anfds + fd;
911 1422
912 if (expect_true (!anfd->reify)) 1423 if (expect_true (!anfd->reify))
913 fd_event_nc (EV_A_ fd, revents); 1424 fd_event_nocheck (EV_A_ fd, revents);
914} 1425}
915 1426
916void 1427void
917ev_feed_fd_event (EV_P_ int fd, int revents) 1428ev_feed_fd_event (EV_P_ int fd, int revents)
918{ 1429{
919 if (fd >= 0 && fd < anfdmax) 1430 if (fd >= 0 && fd < anfdmax)
920 fd_event_nc (EV_A_ fd, revents); 1431 fd_event_nocheck (EV_A_ fd, revents);
921} 1432}
922 1433
923/* make sure the external fd watch events are in-sync */ 1434/* make sure the external fd watch events are in-sync */
924/* with the kernel/libev internal state */ 1435/* with the kernel/libev internal state */
925inline_size void 1436inline_size void
926fd_reify (EV_P) 1437fd_reify (EV_P)
927{ 1438{
928 int i; 1439 int i;
929 1440
1441#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1442 for (i = 0; i < fdchangecnt; ++i)
1443 {
1444 int fd = fdchanges [i];
1445 ANFD *anfd = anfds + fd;
1446
1447 if (anfd->reify & EV__IOFDSET && anfd->head)
1448 {
1449 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1450
1451 if (handle != anfd->handle)
1452 {
1453 unsigned long arg;
1454
1455 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1456
1457 /* handle changed, but fd didn't - we need to do it in two steps */
1458 backend_modify (EV_A_ fd, anfd->events, 0);
1459 anfd->events = 0;
1460 anfd->handle = handle;
1461 }
1462 }
1463 }
1464#endif
1465
930 for (i = 0; i < fdchangecnt; ++i) 1466 for (i = 0; i < fdchangecnt; ++i)
931 { 1467 {
932 int fd = fdchanges [i]; 1468 int fd = fdchanges [i];
933 ANFD *anfd = anfds + fd; 1469 ANFD *anfd = anfds + fd;
934 ev_io *w; 1470 ev_io *w;
935 1471
936 unsigned char events = 0; 1472 unsigned char o_events = anfd->events;
1473 unsigned char o_reify = anfd->reify;
937 1474
938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1475 anfd->reify = 0;
939 events |= (unsigned char)w->events;
940 1476
941#if EV_SELECT_IS_WINSOCKET 1477 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
942 if (events)
943 { 1478 {
944 unsigned long arg; 1479 anfd->events = 0;
945 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1480
946 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1481 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1482 anfd->events |= (unsigned char)w->events;
1483
1484 if (o_events != anfd->events)
1485 o_reify = EV__IOFDSET; /* actually |= */
947 } 1486 }
948#endif
949 1487
950 { 1488 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); 1489 backend_modify (EV_A_ fd, o_events, anfd->events);
959 }
960 } 1490 }
961 1491
962 fdchangecnt = 0; 1492 fdchangecnt = 0;
963} 1493}
964 1494
… …
976 fdchanges [fdchangecnt - 1] = fd; 1506 fdchanges [fdchangecnt - 1] = fd;
977 } 1507 }
978} 1508}
979 1509
980/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1510/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
981inline_speed void 1511inline_speed void ecb_cold
982fd_kill (EV_P_ int fd) 1512fd_kill (EV_P_ int fd)
983{ 1513{
984 ev_io *w; 1514 ev_io *w;
985 1515
986 while ((w = (ev_io *)anfds [fd].head)) 1516 while ((w = (ev_io *)anfds [fd].head))
… …
988 ev_io_stop (EV_A_ w); 1518 ev_io_stop (EV_A_ w);
989 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1519 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
990 } 1520 }
991} 1521}
992 1522
993/* check whether the given fd is atcually valid, for error recovery */ 1523/* check whether the given fd is actually valid, for error recovery */
994inline_size int 1524inline_size int ecb_cold
995fd_valid (int fd) 1525fd_valid (int fd)
996{ 1526{
997#ifdef _WIN32 1527#ifdef _WIN32
998 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1528 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
999#else 1529#else
1000 return fcntl (fd, F_GETFD) != -1; 1530 return fcntl (fd, F_GETFD) != -1;
1001#endif 1531#endif
1002} 1532}
1003 1533
1004/* called on EBADF to verify fds */ 1534/* called on EBADF to verify fds */
1005static void noinline 1535static void noinline ecb_cold
1006fd_ebadf (EV_P) 1536fd_ebadf (EV_P)
1007{ 1537{
1008 int fd; 1538 int fd;
1009 1539
1010 for (fd = 0; fd < anfdmax; ++fd) 1540 for (fd = 0; fd < anfdmax; ++fd)
… …
1012 if (!fd_valid (fd) && errno == EBADF) 1542 if (!fd_valid (fd) && errno == EBADF)
1013 fd_kill (EV_A_ fd); 1543 fd_kill (EV_A_ fd);
1014} 1544}
1015 1545
1016/* called on ENOMEM in select/poll to kill some fds and retry */ 1546/* called on ENOMEM in select/poll to kill some fds and retry */
1017static void noinline 1547static void noinline ecb_cold
1018fd_enomem (EV_P) 1548fd_enomem (EV_P)
1019{ 1549{
1020 int fd; 1550 int fd;
1021 1551
1022 for (fd = anfdmax; fd--; ) 1552 for (fd = anfdmax; fd--; )
… …
1040 anfds [fd].emask = 0; 1570 anfds [fd].emask = 0;
1041 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 1571 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1042 } 1572 }
1043} 1573}
1044 1574
1575/* used to prepare libev internal fd's */
1576/* this is not fork-safe */
1577inline_speed void
1578fd_intern (int fd)
1579{
1580#ifdef _WIN32
1581 unsigned long arg = 1;
1582 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1583#else
1584 fcntl (fd, F_SETFD, FD_CLOEXEC);
1585 fcntl (fd, F_SETFL, O_NONBLOCK);
1586#endif
1587}
1588
1045/*****************************************************************************/ 1589/*****************************************************************************/
1046 1590
1047/* 1591/*
1048 * the heap functions want a real array index. array index 0 uis guaranteed to not 1592 * 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 1593 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1050 * the branching factor of the d-tree. 1594 * the branching factor of the d-tree.
1051 */ 1595 */
1052 1596
1053/* 1597/*
… …
1201 1745
1202static ANSIG signals [EV_NSIG - 1]; 1746static ANSIG signals [EV_NSIG - 1];
1203 1747
1204/*****************************************************************************/ 1748/*****************************************************************************/
1205 1749
1206/* used to prepare libev internal fd's */ 1750#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 1751
1220static void noinline 1752static void noinline ecb_cold
1221evpipe_init (EV_P) 1753evpipe_init (EV_P)
1222{ 1754{
1223 if (!ev_is_active (&pipe_w)) 1755 if (!ev_is_active (&pipe_w))
1224 { 1756 {
1225#if EV_USE_EVENTFD 1757# if EV_USE_EVENTFD
1226 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 1758 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1227 if (evfd < 0 && errno == EINVAL) 1759 if (evfd < 0 && errno == EINVAL)
1228 evfd = eventfd (0, 0); 1760 evfd = eventfd (0, 0);
1229 1761
1230 if (evfd >= 0) 1762 if (evfd >= 0)
… …
1232 evpipe [0] = -1; 1764 evpipe [0] = -1;
1233 fd_intern (evfd); /* doing it twice doesn't hurt */ 1765 fd_intern (evfd); /* doing it twice doesn't hurt */
1234 ev_io_set (&pipe_w, evfd, EV_READ); 1766 ev_io_set (&pipe_w, evfd, EV_READ);
1235 } 1767 }
1236 else 1768 else
1237#endif 1769# endif
1238 { 1770 {
1239 while (pipe (evpipe)) 1771 while (pipe (evpipe))
1240 ev_syserr ("(libev) error creating signal/async pipe"); 1772 ev_syserr ("(libev) error creating signal/async pipe");
1241 1773
1242 fd_intern (evpipe [0]); 1774 fd_intern (evpipe [0]);
… …
1247 ev_io_start (EV_A_ &pipe_w); 1779 ev_io_start (EV_A_ &pipe_w);
1248 ev_unref (EV_A); /* watcher should not keep loop alive */ 1780 ev_unref (EV_A); /* watcher should not keep loop alive */
1249 } 1781 }
1250} 1782}
1251 1783
1252inline_size void 1784inline_speed void
1253evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1785evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1254{ 1786{
1255 if (!*flag) 1787 if (expect_true (*flag))
1788 return;
1789
1790 *flag = 1;
1791
1792 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1793
1794 pipe_write_skipped = 1;
1795
1796 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1797
1798 if (pipe_write_wanted)
1256 { 1799 {
1800 int old_errno;
1801
1802 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1803
1257 int old_errno = errno; /* save errno because write might clobber it */ 1804 old_errno = errno; /* save errno because write will clobber it */
1258
1259 *flag = 1;
1260 1805
1261#if EV_USE_EVENTFD 1806#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1807 if (evfd >= 0)
1263 { 1808 {
1264 uint64_t counter = 1; 1809 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1810 write (evfd, &counter, sizeof (uint64_t));
1266 } 1811 }
1267 else 1812 else
1268#endif 1813#endif
1814 {
1815 /* win32 people keep sending patches that change this write() to send() */
1816 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1817 /* so when you think this write should be a send instead, please find out */
1818 /* where your send() is from - it's definitely not the microsoft send, and */
1819 /* tell me. thank you. */
1269 write (evpipe [1], &old_errno, 1); 1820 write (evpipe [1], &(evpipe [1]), 1);
1821 }
1270 1822
1271 errno = old_errno; 1823 errno = old_errno;
1272 } 1824 }
1273} 1825}
1274 1826
… …
1277static void 1829static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1830pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1831{
1280 int i; 1832 int i;
1281 1833
1834 if (revents & EV_READ)
1835 {
1282#if EV_USE_EVENTFD 1836#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1837 if (evfd >= 0)
1284 { 1838 {
1285 uint64_t counter; 1839 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1840 read (evfd, &counter, sizeof (uint64_t));
1287 } 1841 }
1288 else 1842 else
1289#endif 1843#endif
1290 { 1844 {
1291 char dummy; 1845 char dummy;
1846 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1847 read (evpipe [0], &dummy, 1);
1848 }
1293 } 1849 }
1294 1850
1851 pipe_write_skipped = 0;
1852
1853#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1854 if (sig_pending)
1296 { 1855 {
1297 sig_pending = 0; 1856 sig_pending = 0;
1298 1857
1299 for (i = EV_NSIG - 1; i--; ) 1858 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1859 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1860 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1861 }
1862#endif
1303 1863
1304#if EV_ASYNC_ENABLE 1864#if EV_ASYNC_ENABLE
1305 if (async_pending) 1865 if (async_pending)
1306 { 1866 {
1307 async_pending = 0; 1867 async_pending = 0;
… …
1316#endif 1876#endif
1317} 1877}
1318 1878
1319/*****************************************************************************/ 1879/*****************************************************************************/
1320 1880
1881void
1882ev_feed_signal (int signum)
1883{
1884#if EV_MULTIPLICITY
1885 EV_P = signals [signum - 1].loop;
1886
1887 if (!EV_A)
1888 return;
1889#endif
1890
1891 if (!ev_active (&pipe_w))
1892 return;
1893
1894 signals [signum - 1].pending = 1;
1895 evpipe_write (EV_A_ &sig_pending);
1896}
1897
1321static void 1898static void
1322ev_sighandler (int signum) 1899ev_sighandler (int signum)
1323{ 1900{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1901#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1902 signal (signum, ev_sighandler);
1330#endif 1903#endif
1331 1904
1332 signals [signum - 1].pending = 1; 1905 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1906}
1335 1907
1336void noinline 1908void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1909ev_feed_signal_event (EV_P_ int signum)
1338{ 1910{
… …
1375 break; 1947 break;
1376 } 1948 }
1377} 1949}
1378#endif 1950#endif
1379 1951
1952#endif
1953
1380/*****************************************************************************/ 1954/*****************************************************************************/
1381 1955
1956#if EV_CHILD_ENABLE
1382static WL childs [EV_PID_HASHSIZE]; 1957static WL childs [EV_PID_HASHSIZE];
1383
1384#ifndef _WIN32
1385 1958
1386static ev_signal childev; 1959static ev_signal childev;
1387 1960
1388#ifndef WIFCONTINUED 1961#ifndef WIFCONTINUED
1389# define WIFCONTINUED(status) 0 1962# define WIFCONTINUED(status) 0
… …
1394child_reap (EV_P_ int chain, int pid, int status) 1967child_reap (EV_P_ int chain, int pid, int status)
1395{ 1968{
1396 ev_child *w; 1969 ev_child *w;
1397 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1970 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1398 1971
1399 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1972 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1400 { 1973 {
1401 if ((w->pid == pid || !w->pid) 1974 if ((w->pid == pid || !w->pid)
1402 && (!traced || (w->flags & 1))) 1975 && (!traced || (w->flags & 1)))
1403 { 1976 {
1404 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1977 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 */ 2002 /* 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 */ 2003 /* 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); 2004 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1432 2005
1433 child_reap (EV_A_ pid, pid, status); 2006 child_reap (EV_A_ pid, pid, status);
1434 if (EV_PID_HASHSIZE > 1) 2007 if ((EV_PID_HASHSIZE) > 1)
1435 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2008 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1436} 2009}
1437 2010
1438#endif 2011#endif
1439 2012
1440/*****************************************************************************/ 2013/*****************************************************************************/
1441 2014
2015#if EV_USE_IOCP
2016# include "ev_iocp.c"
2017#endif
1442#if EV_USE_PORT 2018#if EV_USE_PORT
1443# include "ev_port.c" 2019# include "ev_port.c"
1444#endif 2020#endif
1445#if EV_USE_KQUEUE 2021#if EV_USE_KQUEUE
1446# include "ev_kqueue.c" 2022# include "ev_kqueue.c"
… …
1453#endif 2029#endif
1454#if EV_USE_SELECT 2030#if EV_USE_SELECT
1455# include "ev_select.c" 2031# include "ev_select.c"
1456#endif 2032#endif
1457 2033
1458int 2034int ecb_cold
1459ev_version_major (void) 2035ev_version_major (void)
1460{ 2036{
1461 return EV_VERSION_MAJOR; 2037 return EV_VERSION_MAJOR;
1462} 2038}
1463 2039
1464int 2040int ecb_cold
1465ev_version_minor (void) 2041ev_version_minor (void)
1466{ 2042{
1467 return EV_VERSION_MINOR; 2043 return EV_VERSION_MINOR;
1468} 2044}
1469 2045
1470/* return true if we are running with elevated privileges and should ignore env variables */ 2046/* return true if we are running with elevated privileges and should ignore env variables */
1471int inline_size 2047int inline_size ecb_cold
1472enable_secure (void) 2048enable_secure (void)
1473{ 2049{
1474#ifdef _WIN32 2050#ifdef _WIN32
1475 return 0; 2051 return 0;
1476#else 2052#else
1477 return getuid () != geteuid () 2053 return getuid () != geteuid ()
1478 || getgid () != getegid (); 2054 || getgid () != getegid ();
1479#endif 2055#endif
1480} 2056}
1481 2057
1482unsigned int 2058unsigned int ecb_cold
1483ev_supported_backends (void) 2059ev_supported_backends (void)
1484{ 2060{
1485 unsigned int flags = 0; 2061 unsigned int flags = 0;
1486 2062
1487 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2063 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1491 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2067 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1492 2068
1493 return flags; 2069 return flags;
1494} 2070}
1495 2071
1496unsigned int 2072unsigned int ecb_cold
1497ev_recommended_backends (void) 2073ev_recommended_backends (void)
1498{ 2074{
1499 unsigned int flags = ev_supported_backends (); 2075 unsigned int flags = ev_supported_backends ();
1500 2076
1501#ifndef __NetBSD__ 2077#ifndef __NetBSD__
… …
1506#ifdef __APPLE__ 2082#ifdef __APPLE__
1507 /* only select works correctly on that "unix-certified" platform */ 2083 /* only select works correctly on that "unix-certified" platform */
1508 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2084 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1509 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2085 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1510#endif 2086#endif
2087#ifdef __FreeBSD__
2088 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2089#endif
1511 2090
1512 return flags; 2091 return flags;
1513} 2092}
1514 2093
1515unsigned int 2094unsigned int ecb_cold
1516ev_embeddable_backends (void) 2095ev_embeddable_backends (void)
1517{ 2096{
1518 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2097 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1519 2098
1520 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2099 /* 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 */ 2100 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1522 flags &= ~EVBACKEND_EPOLL; 2101 flags &= ~EVBACKEND_EPOLL;
1523 2102
1524 return flags; 2103 return flags;
1525} 2104}
1526 2105
1527unsigned int 2106unsigned int
1528ev_backend (EV_P) 2107ev_backend (EV_P)
1529{ 2108{
1530 return backend; 2109 return backend;
1531} 2110}
1532 2111
1533#if EV_MINIMAL < 2 2112#if EV_FEATURE_API
1534unsigned int 2113unsigned int
1535ev_loop_count (EV_P) 2114ev_iteration (EV_P)
1536{ 2115{
1537 return loop_count; 2116 return loop_count;
1538} 2117}
1539 2118
1540unsigned int 2119unsigned int
1541ev_loop_depth (EV_P) 2120ev_depth (EV_P)
1542{ 2121{
1543 return loop_depth; 2122 return loop_depth;
1544} 2123}
1545 2124
1546void 2125void
… …
1565ev_userdata (EV_P) 2144ev_userdata (EV_P)
1566{ 2145{
1567 return userdata; 2146 return userdata;
1568} 2147}
1569 2148
2149void
1570void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2150ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1571{ 2151{
1572 invoke_cb = invoke_pending_cb; 2152 invoke_cb = invoke_pending_cb;
1573} 2153}
1574 2154
2155void
1575void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2156ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1576{ 2157{
1577 release_cb = release; 2158 release_cb = release;
1578 acquire_cb = acquire; 2159 acquire_cb = acquire;
1579} 2160}
1580#endif 2161#endif
1581 2162
1582/* initialise a loop structure, must be zero-initialised */ 2163/* initialise a loop structure, must be zero-initialised */
1583static void noinline 2164static void noinline ecb_cold
1584loop_init (EV_P_ unsigned int flags) 2165loop_init (EV_P_ unsigned int flags)
1585{ 2166{
1586 if (!backend) 2167 if (!backend)
1587 { 2168 {
2169 origflags = flags;
2170
1588#if EV_USE_REALTIME 2171#if EV_USE_REALTIME
1589 if (!have_realtime) 2172 if (!have_realtime)
1590 { 2173 {
1591 struct timespec ts; 2174 struct timespec ts;
1592 2175
… …
1614 if (!(flags & EVFLAG_NOENV) 2197 if (!(flags & EVFLAG_NOENV)
1615 && !enable_secure () 2198 && !enable_secure ()
1616 && getenv ("LIBEV_FLAGS")) 2199 && getenv ("LIBEV_FLAGS"))
1617 flags = atoi (getenv ("LIBEV_FLAGS")); 2200 flags = atoi (getenv ("LIBEV_FLAGS"));
1618 2201
1619 ev_rt_now = ev_time (); 2202 ev_rt_now = ev_time ();
1620 mn_now = get_clock (); 2203 mn_now = get_clock ();
1621 now_floor = mn_now; 2204 now_floor = mn_now;
1622 rtmn_diff = ev_rt_now - mn_now; 2205 rtmn_diff = ev_rt_now - mn_now;
1623#if EV_MINIMAL < 2 2206#if EV_FEATURE_API
1624 invoke_cb = ev_invoke_pending; 2207 invoke_cb = ev_invoke_pending;
1625#endif 2208#endif
1626 2209
1627 io_blocktime = 0.; 2210 io_blocktime = 0.;
1628 timeout_blocktime = 0.; 2211 timeout_blocktime = 0.;
1629 backend = 0; 2212 backend = 0;
1630 backend_fd = -1; 2213 backend_fd = -1;
1631 sig_pending = 0; 2214 sig_pending = 0;
1632#if EV_ASYNC_ENABLE 2215#if EV_ASYNC_ENABLE
1633 async_pending = 0; 2216 async_pending = 0;
1634#endif 2217#endif
2218 pipe_write_skipped = 0;
2219 pipe_write_wanted = 0;
1635#if EV_USE_INOTIFY 2220#if EV_USE_INOTIFY
1636 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2221 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1637#endif 2222#endif
1638#if EV_USE_SIGNALFD 2223#if EV_USE_SIGNALFD
1639 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2224 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1640#endif 2225#endif
1641 2226
1642 if (!(flags & 0x0000ffffU)) 2227 if (!(flags & EVBACKEND_MASK))
1643 flags |= ev_recommended_backends (); 2228 flags |= ev_recommended_backends ();
1644 2229
2230#if EV_USE_IOCP
2231 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2232#endif
1645#if EV_USE_PORT 2233#if EV_USE_PORT
1646 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2234 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1647#endif 2235#endif
1648#if EV_USE_KQUEUE 2236#if EV_USE_KQUEUE
1649 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2237 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1658 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2246 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1659#endif 2247#endif
1660 2248
1661 ev_prepare_init (&pending_w, pendingcb); 2249 ev_prepare_init (&pending_w, pendingcb);
1662 2250
2251#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1663 ev_init (&pipe_w, pipecb); 2252 ev_init (&pipe_w, pipecb);
1664 ev_set_priority (&pipe_w, EV_MAXPRI); 2253 ev_set_priority (&pipe_w, EV_MAXPRI);
2254#endif
1665 } 2255 }
1666} 2256}
1667 2257
1668/* free up a loop structure */ 2258/* free up a loop structure */
1669static void noinline 2259void ecb_cold
1670loop_destroy (EV_P) 2260ev_loop_destroy (EV_P)
1671{ 2261{
1672 int i; 2262 int i;
2263
2264#if EV_MULTIPLICITY
2265 /* mimic free (0) */
2266 if (!EV_A)
2267 return;
2268#endif
2269
2270#if EV_CLEANUP_ENABLE
2271 /* queue cleanup watchers (and execute them) */
2272 if (expect_false (cleanupcnt))
2273 {
2274 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2275 EV_INVOKE_PENDING;
2276 }
2277#endif
2278
2279#if EV_CHILD_ENABLE
2280 if (ev_is_active (&childev))
2281 {
2282 ev_ref (EV_A); /* child watcher */
2283 ev_signal_stop (EV_A_ &childev);
2284 }
2285#endif
1673 2286
1674 if (ev_is_active (&pipe_w)) 2287 if (ev_is_active (&pipe_w))
1675 { 2288 {
1676 /*ev_ref (EV_A);*/ 2289 /*ev_ref (EV_A);*/
1677 /*ev_io_stop (EV_A_ &pipe_w);*/ 2290 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1699#endif 2312#endif
1700 2313
1701 if (backend_fd >= 0) 2314 if (backend_fd >= 0)
1702 close (backend_fd); 2315 close (backend_fd);
1703 2316
2317#if EV_USE_IOCP
2318 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2319#endif
1704#if EV_USE_PORT 2320#if EV_USE_PORT
1705 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2321 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1706#endif 2322#endif
1707#if EV_USE_KQUEUE 2323#if EV_USE_KQUEUE
1708 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2324 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1735 array_free (periodic, EMPTY); 2351 array_free (periodic, EMPTY);
1736#endif 2352#endif
1737#if EV_FORK_ENABLE 2353#if EV_FORK_ENABLE
1738 array_free (fork, EMPTY); 2354 array_free (fork, EMPTY);
1739#endif 2355#endif
2356#if EV_CLEANUP_ENABLE
2357 array_free (cleanup, EMPTY);
2358#endif
1740 array_free (prepare, EMPTY); 2359 array_free (prepare, EMPTY);
1741 array_free (check, EMPTY); 2360 array_free (check, EMPTY);
1742#if EV_ASYNC_ENABLE 2361#if EV_ASYNC_ENABLE
1743 array_free (async, EMPTY); 2362 array_free (async, EMPTY);
1744#endif 2363#endif
1745 2364
1746 backend = 0; 2365 backend = 0;
2366
2367#if EV_MULTIPLICITY
2368 if (ev_is_default_loop (EV_A))
2369#endif
2370 ev_default_loop_ptr = 0;
2371#if EV_MULTIPLICITY
2372 else
2373 ev_free (EV_A);
2374#endif
1747} 2375}
1748 2376
1749#if EV_USE_INOTIFY 2377#if EV_USE_INOTIFY
1750inline_size void infy_fork (EV_P); 2378inline_size void infy_fork (EV_P);
1751#endif 2379#endif
… …
1766 infy_fork (EV_A); 2394 infy_fork (EV_A);
1767#endif 2395#endif
1768 2396
1769 if (ev_is_active (&pipe_w)) 2397 if (ev_is_active (&pipe_w))
1770 { 2398 {
1771 /* this "locks" the handlers against writing to the pipe */ 2399 /* 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 2400
1778 ev_ref (EV_A); 2401 ev_ref (EV_A);
1779 ev_io_stop (EV_A_ &pipe_w); 2402 ev_io_stop (EV_A_ &pipe_w);
1780 2403
1781#if EV_USE_EVENTFD 2404#if EV_USE_EVENTFD
… …
1787 { 2410 {
1788 EV_WIN32_CLOSE_FD (evpipe [0]); 2411 EV_WIN32_CLOSE_FD (evpipe [0]);
1789 EV_WIN32_CLOSE_FD (evpipe [1]); 2412 EV_WIN32_CLOSE_FD (evpipe [1]);
1790 } 2413 }
1791 2414
2415#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1792 evpipe_init (EV_A); 2416 evpipe_init (EV_A);
1793 /* now iterate over everything, in case we missed something */ 2417 /* now iterate over everything, in case we missed something */
1794 pipecb (EV_A_ &pipe_w, EV_READ); 2418 pipecb (EV_A_ &pipe_w, EV_READ);
2419#endif
1795 } 2420 }
1796 2421
1797 postfork = 0; 2422 postfork = 0;
1798} 2423}
1799 2424
1800#if EV_MULTIPLICITY 2425#if EV_MULTIPLICITY
1801 2426
1802struct ev_loop * 2427struct ev_loop * ecb_cold
1803ev_loop_new (unsigned int flags) 2428ev_loop_new (unsigned int flags)
1804{ 2429{
1805 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2430 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1806 2431
1807 memset (EV_A, 0, sizeof (struct ev_loop)); 2432 memset (EV_A, 0, sizeof (struct ev_loop));
1808 loop_init (EV_A_ flags); 2433 loop_init (EV_A_ flags);
1809 2434
1810 if (ev_backend (EV_A)) 2435 if (ev_backend (EV_A))
1811 return EV_A; 2436 return EV_A;
1812 2437
2438 ev_free (EV_A);
1813 return 0; 2439 return 0;
1814} 2440}
1815 2441
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 */ 2442#endif /* multiplicity */
1829 2443
1830#if EV_VERIFY 2444#if EV_VERIFY
1831static void noinline 2445static void noinline ecb_cold
1832verify_watcher (EV_P_ W w) 2446verify_watcher (EV_P_ W w)
1833{ 2447{
1834 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2448 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1835 2449
1836 if (w->pending) 2450 if (w->pending)
1837 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2451 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1838} 2452}
1839 2453
1840static void noinline 2454static void noinline ecb_cold
1841verify_heap (EV_P_ ANHE *heap, int N) 2455verify_heap (EV_P_ ANHE *heap, int N)
1842{ 2456{
1843 int i; 2457 int i;
1844 2458
1845 for (i = HEAP0; i < N + HEAP0; ++i) 2459 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1850 2464
1851 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2465 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1852 } 2466 }
1853} 2467}
1854 2468
1855static void noinline 2469static void noinline ecb_cold
1856array_verify (EV_P_ W *ws, int cnt) 2470array_verify (EV_P_ W *ws, int cnt)
1857{ 2471{
1858 while (cnt--) 2472 while (cnt--)
1859 { 2473 {
1860 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2474 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1861 verify_watcher (EV_A_ ws [cnt]); 2475 verify_watcher (EV_A_ ws [cnt]);
1862 } 2476 }
1863} 2477}
1864#endif 2478#endif
1865 2479
1866#if EV_MINIMAL < 2 2480#if EV_FEATURE_API
1867void 2481void ecb_cold
1868ev_loop_verify (EV_P) 2482ev_verify (EV_P)
1869{ 2483{
1870#if EV_VERIFY 2484#if EV_VERIFY
1871 int i; 2485 int i;
1872 WL w; 2486 WL w;
1873 2487
… …
1907#if EV_FORK_ENABLE 2521#if EV_FORK_ENABLE
1908 assert (forkmax >= forkcnt); 2522 assert (forkmax >= forkcnt);
1909 array_verify (EV_A_ (W *)forks, forkcnt); 2523 array_verify (EV_A_ (W *)forks, forkcnt);
1910#endif 2524#endif
1911 2525
2526#if EV_CLEANUP_ENABLE
2527 assert (cleanupmax >= cleanupcnt);
2528 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2529#endif
2530
1912#if EV_ASYNC_ENABLE 2531#if EV_ASYNC_ENABLE
1913 assert (asyncmax >= asynccnt); 2532 assert (asyncmax >= asynccnt);
1914 array_verify (EV_A_ (W *)asyncs, asynccnt); 2533 array_verify (EV_A_ (W *)asyncs, asynccnt);
1915#endif 2534#endif
1916 2535
2536#if EV_PREPARE_ENABLE
1917 assert (preparemax >= preparecnt); 2537 assert (preparemax >= preparecnt);
1918 array_verify (EV_A_ (W *)prepares, preparecnt); 2538 array_verify (EV_A_ (W *)prepares, preparecnt);
2539#endif
1919 2540
2541#if EV_CHECK_ENABLE
1920 assert (checkmax >= checkcnt); 2542 assert (checkmax >= checkcnt);
1921 array_verify (EV_A_ (W *)checks, checkcnt); 2543 array_verify (EV_A_ (W *)checks, checkcnt);
2544#endif
1922 2545
1923# if 0 2546# if 0
2547#if EV_CHILD_ENABLE
1924 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2548 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) 2549 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2550#endif
1926# endif 2551# endif
1927#endif 2552#endif
1928} 2553}
1929#endif 2554#endif
1930 2555
1931#if EV_MULTIPLICITY 2556#if EV_MULTIPLICITY
1932struct ev_loop * 2557struct ev_loop * ecb_cold
1933ev_default_loop_init (unsigned int flags)
1934#else 2558#else
1935int 2559int
2560#endif
1936ev_default_loop (unsigned int flags) 2561ev_default_loop (unsigned int flags)
1937#endif
1938{ 2562{
1939 if (!ev_default_loop_ptr) 2563 if (!ev_default_loop_ptr)
1940 { 2564 {
1941#if EV_MULTIPLICITY 2565#if EV_MULTIPLICITY
1942 EV_P = ev_default_loop_ptr = &default_loop_struct; 2566 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1946 2570
1947 loop_init (EV_A_ flags); 2571 loop_init (EV_A_ flags);
1948 2572
1949 if (ev_backend (EV_A)) 2573 if (ev_backend (EV_A))
1950 { 2574 {
1951#ifndef _WIN32 2575#if EV_CHILD_ENABLE
1952 ev_signal_init (&childev, childcb, SIGCHLD); 2576 ev_signal_init (&childev, childcb, SIGCHLD);
1953 ev_set_priority (&childev, EV_MAXPRI); 2577 ev_set_priority (&childev, EV_MAXPRI);
1954 ev_signal_start (EV_A_ &childev); 2578 ev_signal_start (EV_A_ &childev);
1955 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2579 ev_unref (EV_A); /* child watcher should not keep loop alive */
1956#endif 2580#endif
… …
1961 2585
1962 return ev_default_loop_ptr; 2586 return ev_default_loop_ptr;
1963} 2587}
1964 2588
1965void 2589void
1966ev_default_destroy (void) 2590ev_loop_fork (EV_P)
1967{ 2591{
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 */ 2592 postfork = 1; /* must be in line with ev_default_fork */
1990} 2593}
1991 2594
1992/*****************************************************************************/ 2595/*****************************************************************************/
1993 2596
1994void 2597void
… …
2016 2619
2017 for (pri = NUMPRI; pri--; ) 2620 for (pri = NUMPRI; pri--; )
2018 while (pendingcnt [pri]) 2621 while (pendingcnt [pri])
2019 { 2622 {
2020 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2623 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 2624
2025 p->w->pending = 0; 2625 p->w->pending = 0;
2026 EV_CB_INVOKE (p->w, p->events); 2626 EV_CB_INVOKE (p->w, p->events);
2027 EV_FREQUENT_CHECK; 2627 EV_FREQUENT_CHECK;
2028 } 2628 }
… …
2085 EV_FREQUENT_CHECK; 2685 EV_FREQUENT_CHECK;
2086 feed_reverse (EV_A_ (W)w); 2686 feed_reverse (EV_A_ (W)w);
2087 } 2687 }
2088 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2688 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2089 2689
2090 feed_reverse_done (EV_A_ EV_TIMEOUT); 2690 feed_reverse_done (EV_A_ EV_TIMER);
2091 } 2691 }
2092} 2692}
2093 2693
2094#if EV_PERIODIC_ENABLE 2694#if EV_PERIODIC_ENABLE
2695
2696static void noinline
2697periodic_recalc (EV_P_ ev_periodic *w)
2698{
2699 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2700 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2701
2702 /* the above almost always errs on the low side */
2703 while (at <= ev_rt_now)
2704 {
2705 ev_tstamp nat = at + w->interval;
2706
2707 /* when resolution fails us, we use ev_rt_now */
2708 if (expect_false (nat == at))
2709 {
2710 at = ev_rt_now;
2711 break;
2712 }
2713
2714 at = nat;
2715 }
2716
2717 ev_at (w) = at;
2718}
2719
2095/* make periodics pending */ 2720/* make periodics pending */
2096inline_size void 2721inline_size void
2097periodics_reify (EV_P) 2722periodics_reify (EV_P)
2098{ 2723{
2099 EV_FREQUENT_CHECK; 2724 EV_FREQUENT_CHECK;
… …
2118 ANHE_at_cache (periodics [HEAP0]); 2743 ANHE_at_cache (periodics [HEAP0]);
2119 downheap (periodics, periodiccnt, HEAP0); 2744 downheap (periodics, periodiccnt, HEAP0);
2120 } 2745 }
2121 else if (w->interval) 2746 else if (w->interval)
2122 { 2747 {
2123 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2748 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]); 2749 ANHE_at_cache (periodics [HEAP0]);
2138 downheap (periodics, periodiccnt, HEAP0); 2750 downheap (periodics, periodiccnt, HEAP0);
2139 } 2751 }
2140 else 2752 else
2141 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2753 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2148 feed_reverse_done (EV_A_ EV_PERIODIC); 2760 feed_reverse_done (EV_A_ EV_PERIODIC);
2149 } 2761 }
2150} 2762}
2151 2763
2152/* simply recalculate all periodics */ 2764/* simply recalculate all periodics */
2153/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2765/* TODO: maybe ensure that at least one event happens when jumping forward? */
2154static void noinline 2766static void noinline ecb_cold
2155periodics_reschedule (EV_P) 2767periodics_reschedule (EV_P)
2156{ 2768{
2157 int i; 2769 int i;
2158 2770
2159 /* adjust periodics after time jump */ 2771 /* adjust periodics after time jump */
… …
2162 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2774 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2163 2775
2164 if (w->reschedule_cb) 2776 if (w->reschedule_cb)
2165 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2777 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2166 else if (w->interval) 2778 else if (w->interval)
2167 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2779 periodic_recalc (EV_A_ w);
2168 2780
2169 ANHE_at_cache (periodics [i]); 2781 ANHE_at_cache (periodics [i]);
2170 } 2782 }
2171 2783
2172 reheap (periodics, periodiccnt); 2784 reheap (periodics, periodiccnt);
2173} 2785}
2174#endif 2786#endif
2175 2787
2176/* adjust all timers by a given offset */ 2788/* adjust all timers by a given offset */
2177static void noinline 2789static void noinline ecb_cold
2178timers_reschedule (EV_P_ ev_tstamp adjust) 2790timers_reschedule (EV_P_ ev_tstamp adjust)
2179{ 2791{
2180 int i; 2792 int i;
2181 2793
2182 for (i = 0; i < timercnt; ++i) 2794 for (i = 0; i < timercnt; ++i)
… …
2219 * doesn't hurt either as we only do this on time-jumps or 2831 * doesn't hurt either as we only do this on time-jumps or
2220 * in the unlikely event of having been preempted here. 2832 * in the unlikely event of having been preempted here.
2221 */ 2833 */
2222 for (i = 4; --i; ) 2834 for (i = 4; --i; )
2223 { 2835 {
2836 ev_tstamp diff;
2224 rtmn_diff = ev_rt_now - mn_now; 2837 rtmn_diff = ev_rt_now - mn_now;
2225 2838
2839 diff = odiff - rtmn_diff;
2840
2226 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2841 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2227 return; /* all is well */ 2842 return; /* all is well */
2228 2843
2229 ev_rt_now = ev_time (); 2844 ev_rt_now = ev_time ();
2230 mn_now = get_clock (); 2845 mn_now = get_clock ();
2231 now_floor = mn_now; 2846 now_floor = mn_now;
… …
2254 mn_now = ev_rt_now; 2869 mn_now = ev_rt_now;
2255 } 2870 }
2256} 2871}
2257 2872
2258void 2873void
2259ev_loop (EV_P_ int flags) 2874ev_run (EV_P_ int flags)
2260{ 2875{
2261#if EV_MINIMAL < 2 2876#if EV_FEATURE_API
2262 ++loop_depth; 2877 ++loop_depth;
2263#endif 2878#endif
2264 2879
2265 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2880 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2266 2881
2267 loop_done = EVUNLOOP_CANCEL; 2882 loop_done = EVBREAK_CANCEL;
2268 2883
2269 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2884 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2270 2885
2271 do 2886 do
2272 { 2887 {
2273#if EV_VERIFY >= 2 2888#if EV_VERIFY >= 2
2274 ev_loop_verify (EV_A); 2889 ev_verify (EV_A);
2275#endif 2890#endif
2276 2891
2277#ifndef _WIN32 2892#ifndef _WIN32
2278 if (expect_false (curpid)) /* penalise the forking check even more */ 2893 if (expect_false (curpid)) /* penalise the forking check even more */
2279 if (expect_false (getpid () != curpid)) 2894 if (expect_false (getpid () != curpid))
… …
2291 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2906 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2292 EV_INVOKE_PENDING; 2907 EV_INVOKE_PENDING;
2293 } 2908 }
2294#endif 2909#endif
2295 2910
2911#if EV_PREPARE_ENABLE
2296 /* queue prepare watchers (and execute them) */ 2912 /* queue prepare watchers (and execute them) */
2297 if (expect_false (preparecnt)) 2913 if (expect_false (preparecnt))
2298 { 2914 {
2299 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2915 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2300 EV_INVOKE_PENDING; 2916 EV_INVOKE_PENDING;
2301 } 2917 }
2918#endif
2302 2919
2303 if (expect_false (loop_done)) 2920 if (expect_false (loop_done))
2304 break; 2921 break;
2305 2922
2306 /* we might have forked, so reify kernel state if necessary */ 2923 /* we might have forked, so reify kernel state if necessary */
… …
2313 /* calculate blocking time */ 2930 /* calculate blocking time */
2314 { 2931 {
2315 ev_tstamp waittime = 0.; 2932 ev_tstamp waittime = 0.;
2316 ev_tstamp sleeptime = 0.; 2933 ev_tstamp sleeptime = 0.;
2317 2934
2935 /* remember old timestamp for io_blocktime calculation */
2936 ev_tstamp prev_mn_now = mn_now;
2937
2938 /* update time to cancel out callback processing overhead */
2939 time_update (EV_A_ 1e100);
2940
2941 /* from now on, we want a pipe-wake-up */
2942 pipe_write_wanted = 1;
2943
2944 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2945
2318 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2946 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2319 { 2947 {
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; 2948 waittime = MAX_BLOCKTIME;
2327 2949
2328 if (timercnt) 2950 if (timercnt)
2329 { 2951 {
2330 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2952 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2331 if (waittime > to) waittime = to; 2953 if (waittime > to) waittime = to;
2332 } 2954 }
2333 2955
2334#if EV_PERIODIC_ENABLE 2956#if EV_PERIODIC_ENABLE
2335 if (periodiccnt) 2957 if (periodiccnt)
2336 { 2958 {
2337 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2959 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2338 if (waittime > to) waittime = to; 2960 if (waittime > to) waittime = to;
2339 } 2961 }
2340#endif 2962#endif
2341 2963
2342 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2964 /* don't let timeouts decrease the waittime below timeout_blocktime */
2343 if (expect_false (waittime < timeout_blocktime)) 2965 if (expect_false (waittime < timeout_blocktime))
2344 waittime = timeout_blocktime; 2966 waittime = timeout_blocktime;
2967
2968 /* at this point, we NEED to wait, so we have to ensure */
2969 /* to pass a minimum nonzero value to the backend */
2970 if (expect_false (waittime < backend_mintime))
2971 waittime = backend_mintime;
2345 2972
2346 /* extra check because io_blocktime is commonly 0 */ 2973 /* extra check because io_blocktime is commonly 0 */
2347 if (expect_false (io_blocktime)) 2974 if (expect_false (io_blocktime))
2348 { 2975 {
2349 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2976 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2350 2977
2351 if (sleeptime > waittime - backend_fudge) 2978 if (sleeptime > waittime - backend_mintime)
2352 sleeptime = waittime - backend_fudge; 2979 sleeptime = waittime - backend_mintime;
2353 2980
2354 if (expect_true (sleeptime > 0.)) 2981 if (expect_true (sleeptime > 0.))
2355 { 2982 {
2356 ev_sleep (sleeptime); 2983 ev_sleep (sleeptime);
2357 waittime -= sleeptime; 2984 waittime -= sleeptime;
2358 } 2985 }
2359 } 2986 }
2360 } 2987 }
2361 2988
2362#if EV_MINIMAL < 2 2989#if EV_FEATURE_API
2363 ++loop_count; 2990 ++loop_count;
2364#endif 2991#endif
2365 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2992 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2366 backend_poll (EV_A_ waittime); 2993 backend_poll (EV_A_ waittime);
2367 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2994 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2995
2996 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2997
2998 if (pipe_write_skipped)
2999 {
3000 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3001 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3002 }
3003
2368 3004
2369 /* update ev_rt_now, do magic */ 3005 /* update ev_rt_now, do magic */
2370 time_update (EV_A_ waittime + sleeptime); 3006 time_update (EV_A_ waittime + sleeptime);
2371 } 3007 }
2372 3008
… …
2379#if EV_IDLE_ENABLE 3015#if EV_IDLE_ENABLE
2380 /* queue idle watchers unless other events are pending */ 3016 /* queue idle watchers unless other events are pending */
2381 idle_reify (EV_A); 3017 idle_reify (EV_A);
2382#endif 3018#endif
2383 3019
3020#if EV_CHECK_ENABLE
2384 /* queue check watchers, to be executed first */ 3021 /* queue check watchers, to be executed first */
2385 if (expect_false (checkcnt)) 3022 if (expect_false (checkcnt))
2386 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3023 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3024#endif
2387 3025
2388 EV_INVOKE_PENDING; 3026 EV_INVOKE_PENDING;
2389 } 3027 }
2390 while (expect_true ( 3028 while (expect_true (
2391 activecnt 3029 activecnt
2392 && !loop_done 3030 && !loop_done
2393 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3031 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2394 )); 3032 ));
2395 3033
2396 if (loop_done == EVUNLOOP_ONE) 3034 if (loop_done == EVBREAK_ONE)
2397 loop_done = EVUNLOOP_CANCEL; 3035 loop_done = EVBREAK_CANCEL;
2398 3036
2399#if EV_MINIMAL < 2 3037#if EV_FEATURE_API
2400 --loop_depth; 3038 --loop_depth;
2401#endif 3039#endif
2402} 3040}
2403 3041
2404void 3042void
2405ev_unloop (EV_P_ int how) 3043ev_break (EV_P_ int how)
2406{ 3044{
2407 loop_done = how; 3045 loop_done = how;
2408} 3046}
2409 3047
2410void 3048void
… …
2558 EV_FREQUENT_CHECK; 3196 EV_FREQUENT_CHECK;
2559 3197
2560 wlist_del (&anfds[w->fd].head, (WL)w); 3198 wlist_del (&anfds[w->fd].head, (WL)w);
2561 ev_stop (EV_A_ (W)w); 3199 ev_stop (EV_A_ (W)w);
2562 3200
2563 fd_change (EV_A_ w->fd, 1); 3201 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2564 3202
2565 EV_FREQUENT_CHECK; 3203 EV_FREQUENT_CHECK;
2566} 3204}
2567 3205
2568void noinline 3206void noinline
… …
2660 if (w->reschedule_cb) 3298 if (w->reschedule_cb)
2661 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3299 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2662 else if (w->interval) 3300 else if (w->interval)
2663 { 3301 {
2664 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3302 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 */ 3303 periodic_recalc (EV_A_ w);
2666 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2667 } 3304 }
2668 else 3305 else
2669 ev_at (w) = w->offset; 3306 ev_at (w) = w->offset;
2670 3307
2671 EV_FREQUENT_CHECK; 3308 EV_FREQUENT_CHECK;
… …
2720#endif 3357#endif
2721 3358
2722#ifndef SA_RESTART 3359#ifndef SA_RESTART
2723# define SA_RESTART 0 3360# define SA_RESTART 0
2724#endif 3361#endif
3362
3363#if EV_SIGNAL_ENABLE
2725 3364
2726void noinline 3365void noinline
2727ev_signal_start (EV_P_ ev_signal *w) 3366ev_signal_start (EV_P_ ev_signal *w)
2728{ 3367{
2729 if (expect_false (ev_is_active (w))) 3368 if (expect_false (ev_is_active (w)))
… …
2790 sa.sa_handler = ev_sighandler; 3429 sa.sa_handler = ev_sighandler;
2791 sigfillset (&sa.sa_mask); 3430 sigfillset (&sa.sa_mask);
2792 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3431 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2793 sigaction (w->signum, &sa, 0); 3432 sigaction (w->signum, &sa, 0);
2794 3433
3434 if (origflags & EVFLAG_NOSIGMASK)
3435 {
2795 sigemptyset (&sa.sa_mask); 3436 sigemptyset (&sa.sa_mask);
2796 sigaddset (&sa.sa_mask, w->signum); 3437 sigaddset (&sa.sa_mask, w->signum);
2797 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3438 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3439 }
2798#endif 3440#endif
2799 } 3441 }
2800 3442
2801 EV_FREQUENT_CHECK; 3443 EV_FREQUENT_CHECK;
2802} 3444}
… …
2836 } 3478 }
2837 3479
2838 EV_FREQUENT_CHECK; 3480 EV_FREQUENT_CHECK;
2839} 3481}
2840 3482
3483#endif
3484
3485#if EV_CHILD_ENABLE
3486
2841void 3487void
2842ev_child_start (EV_P_ ev_child *w) 3488ev_child_start (EV_P_ ev_child *w)
2843{ 3489{
2844#if EV_MULTIPLICITY 3490#if EV_MULTIPLICITY
2845 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3491 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
… …
2848 return; 3494 return;
2849 3495
2850 EV_FREQUENT_CHECK; 3496 EV_FREQUENT_CHECK;
2851 3497
2852 ev_start (EV_A_ (W)w, 1); 3498 ev_start (EV_A_ (W)w, 1);
2853 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3499 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2854 3500
2855 EV_FREQUENT_CHECK; 3501 EV_FREQUENT_CHECK;
2856} 3502}
2857 3503
2858void 3504void
… …
2862 if (expect_false (!ev_is_active (w))) 3508 if (expect_false (!ev_is_active (w)))
2863 return; 3509 return;
2864 3510
2865 EV_FREQUENT_CHECK; 3511 EV_FREQUENT_CHECK;
2866 3512
2867 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3513 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2868 ev_stop (EV_A_ (W)w); 3514 ev_stop (EV_A_ (W)w);
2869 3515
2870 EV_FREQUENT_CHECK; 3516 EV_FREQUENT_CHECK;
2871} 3517}
3518
3519#endif
2872 3520
2873#if EV_STAT_ENABLE 3521#if EV_STAT_ENABLE
2874 3522
2875# ifdef _WIN32 3523# ifdef _WIN32
2876# undef lstat 3524# undef lstat
… …
2937 if (!pend || pend == path) 3585 if (!pend || pend == path)
2938 break; 3586 break;
2939 3587
2940 *pend = 0; 3588 *pend = 0;
2941 w->wd = inotify_add_watch (fs_fd, path, mask); 3589 w->wd = inotify_add_watch (fs_fd, path, mask);
2942 } 3590 }
2943 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3591 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2944 } 3592 }
2945 } 3593 }
2946 3594
2947 if (w->wd >= 0) 3595 if (w->wd >= 0)
2948 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3596 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2949 3597
2950 /* now re-arm timer, if required */ 3598 /* now re-arm timer, if required */
2951 if (ev_is_active (&w->timer)) ev_ref (EV_A); 3599 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2952 ev_timer_again (EV_A_ &w->timer); 3600 ev_timer_again (EV_A_ &w->timer);
2953 if (ev_is_active (&w->timer)) ev_unref (EV_A); 3601 if (ev_is_active (&w->timer)) ev_unref (EV_A);
… …
2961 3609
2962 if (wd < 0) 3610 if (wd < 0)
2963 return; 3611 return;
2964 3612
2965 w->wd = -2; 3613 w->wd = -2;
2966 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3614 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2967 wlist_del (&fs_hash [slot].head, (WL)w); 3615 wlist_del (&fs_hash [slot].head, (WL)w);
2968 3616
2969 /* remove this watcher, if others are watching it, they will rearm */ 3617 /* remove this watcher, if others are watching it, they will rearm */
2970 inotify_rm_watch (fs_fd, wd); 3618 inotify_rm_watch (fs_fd, wd);
2971} 3619}
… …
2973static void noinline 3621static void noinline
2974infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3622infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2975{ 3623{
2976 if (slot < 0) 3624 if (slot < 0)
2977 /* overflow, need to check for all hash slots */ 3625 /* overflow, need to check for all hash slots */
2978 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3626 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2979 infy_wd (EV_A_ slot, wd, ev); 3627 infy_wd (EV_A_ slot, wd, ev);
2980 else 3628 else
2981 { 3629 {
2982 WL w_; 3630 WL w_;
2983 3631
2984 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3632 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2985 { 3633 {
2986 ev_stat *w = (ev_stat *)w_; 3634 ev_stat *w = (ev_stat *)w_;
2987 w_ = w_->next; /* lets us remove this watcher and all before it */ 3635 w_ = w_->next; /* lets us remove this watcher and all before it */
2988 3636
2989 if (w->wd == wd || wd == -1) 3637 if (w->wd == wd || wd == -1)
2990 { 3638 {
2991 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3639 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2992 { 3640 {
2993 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3641 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2994 w->wd = -1; 3642 w->wd = -1;
2995 infy_add (EV_A_ w); /* re-add, no matter what */ 3643 infy_add (EV_A_ w); /* re-add, no matter what */
2996 } 3644 }
2997 3645
2998 stat_timer_cb (EV_A_ &w->timer, 0); 3646 stat_timer_cb (EV_A_ &w->timer, 0);
… …
3014 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3662 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3015 ofs += sizeof (struct inotify_event) + ev->len; 3663 ofs += sizeof (struct inotify_event) + ev->len;
3016 } 3664 }
3017} 3665}
3018 3666
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 3667inline_size void ecb_cold
3052ev_check_2625 (EV_P) 3668ev_check_2625 (EV_P)
3053{ 3669{
3054 /* kernels < 2.6.25 are borked 3670 /* kernels < 2.6.25 are borked
3055 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3671 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3056 */ 3672 */
… …
3112 ev_io_set (&fs_w, fs_fd, EV_READ); 3728 ev_io_set (&fs_w, fs_fd, EV_READ);
3113 ev_io_start (EV_A_ &fs_w); 3729 ev_io_start (EV_A_ &fs_w);
3114 ev_unref (EV_A); 3730 ev_unref (EV_A);
3115 } 3731 }
3116 3732
3117 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3733 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3118 { 3734 {
3119 WL w_ = fs_hash [slot].head; 3735 WL w_ = fs_hash [slot].head;
3120 fs_hash [slot].head = 0; 3736 fs_hash [slot].head = 0;
3121 3737
3122 while (w_) 3738 while (w_)
… …
3297 3913
3298 EV_FREQUENT_CHECK; 3914 EV_FREQUENT_CHECK;
3299} 3915}
3300#endif 3916#endif
3301 3917
3918#if EV_PREPARE_ENABLE
3302void 3919void
3303ev_prepare_start (EV_P_ ev_prepare *w) 3920ev_prepare_start (EV_P_ ev_prepare *w)
3304{ 3921{
3305 if (expect_false (ev_is_active (w))) 3922 if (expect_false (ev_is_active (w)))
3306 return; 3923 return;
… …
3332 3949
3333 ev_stop (EV_A_ (W)w); 3950 ev_stop (EV_A_ (W)w);
3334 3951
3335 EV_FREQUENT_CHECK; 3952 EV_FREQUENT_CHECK;
3336} 3953}
3954#endif
3337 3955
3956#if EV_CHECK_ENABLE
3338void 3957void
3339ev_check_start (EV_P_ ev_check *w) 3958ev_check_start (EV_P_ ev_check *w)
3340{ 3959{
3341 if (expect_false (ev_is_active (w))) 3960 if (expect_false (ev_is_active (w)))
3342 return; 3961 return;
… …
3368 3987
3369 ev_stop (EV_A_ (W)w); 3988 ev_stop (EV_A_ (W)w);
3370 3989
3371 EV_FREQUENT_CHECK; 3990 EV_FREQUENT_CHECK;
3372} 3991}
3992#endif
3373 3993
3374#if EV_EMBED_ENABLE 3994#if EV_EMBED_ENABLE
3375void noinline 3995void noinline
3376ev_embed_sweep (EV_P_ ev_embed *w) 3996ev_embed_sweep (EV_P_ ev_embed *w)
3377{ 3997{
3378 ev_loop (w->other, EVLOOP_NONBLOCK); 3998 ev_run (w->other, EVRUN_NOWAIT);
3379} 3999}
3380 4000
3381static void 4001static void
3382embed_io_cb (EV_P_ ev_io *io, int revents) 4002embed_io_cb (EV_P_ ev_io *io, int revents)
3383{ 4003{
3384 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4004 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3385 4005
3386 if (ev_cb (w)) 4006 if (ev_cb (w))
3387 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4007 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3388 else 4008 else
3389 ev_loop (w->other, EVLOOP_NONBLOCK); 4009 ev_run (w->other, EVRUN_NOWAIT);
3390} 4010}
3391 4011
3392static void 4012static void
3393embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4013embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3394{ 4014{
… …
3398 EV_P = w->other; 4018 EV_P = w->other;
3399 4019
3400 while (fdchangecnt) 4020 while (fdchangecnt)
3401 { 4021 {
3402 fd_reify (EV_A); 4022 fd_reify (EV_A);
3403 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4023 ev_run (EV_A_ EVRUN_NOWAIT);
3404 } 4024 }
3405 } 4025 }
3406} 4026}
3407 4027
3408static void 4028static void
… …
3414 4034
3415 { 4035 {
3416 EV_P = w->other; 4036 EV_P = w->other;
3417 4037
3418 ev_loop_fork (EV_A); 4038 ev_loop_fork (EV_A);
3419 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4039 ev_run (EV_A_ EVRUN_NOWAIT);
3420 } 4040 }
3421 4041
3422 ev_embed_start (EV_A_ w); 4042 ev_embed_start (EV_A_ w);
3423} 4043}
3424 4044
… …
3516 4136
3517 EV_FREQUENT_CHECK; 4137 EV_FREQUENT_CHECK;
3518} 4138}
3519#endif 4139#endif
3520 4140
4141#if EV_CLEANUP_ENABLE
4142void
4143ev_cleanup_start (EV_P_ ev_cleanup *w)
4144{
4145 if (expect_false (ev_is_active (w)))
4146 return;
4147
4148 EV_FREQUENT_CHECK;
4149
4150 ev_start (EV_A_ (W)w, ++cleanupcnt);
4151 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4152 cleanups [cleanupcnt - 1] = w;
4153
4154 /* cleanup watchers should never keep a refcount on the loop */
4155 ev_unref (EV_A);
4156 EV_FREQUENT_CHECK;
4157}
4158
4159void
4160ev_cleanup_stop (EV_P_ ev_cleanup *w)
4161{
4162 clear_pending (EV_A_ (W)w);
4163 if (expect_false (!ev_is_active (w)))
4164 return;
4165
4166 EV_FREQUENT_CHECK;
4167 ev_ref (EV_A);
4168
4169 {
4170 int active = ev_active (w);
4171
4172 cleanups [active - 1] = cleanups [--cleanupcnt];
4173 ev_active (cleanups [active - 1]) = active;
4174 }
4175
4176 ev_stop (EV_A_ (W)w);
4177
4178 EV_FREQUENT_CHECK;
4179}
4180#endif
4181
3521#if EV_ASYNC_ENABLE 4182#if EV_ASYNC_ENABLE
3522void 4183void
3523ev_async_start (EV_P_ ev_async *w) 4184ev_async_start (EV_P_ ev_async *w)
3524{ 4185{
3525 if (expect_false (ev_is_active (w))) 4186 if (expect_false (ev_is_active (w)))
3526 return; 4187 return;
4188
4189 w->sent = 0;
3527 4190
3528 evpipe_init (EV_A); 4191 evpipe_init (EV_A);
3529 4192
3530 EV_FREQUENT_CHECK; 4193 EV_FREQUENT_CHECK;
3531 4194
… …
3609{ 4272{
3610 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4273 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3611 4274
3612 if (expect_false (!once)) 4275 if (expect_false (!once))
3613 { 4276 {
3614 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4277 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3615 return; 4278 return;
3616 } 4279 }
3617 4280
3618 once->cb = cb; 4281 once->cb = cb;
3619 once->arg = arg; 4282 once->arg = arg;
… …
3634} 4297}
3635 4298
3636/*****************************************************************************/ 4299/*****************************************************************************/
3637 4300
3638#if EV_WALK_ENABLE 4301#if EV_WALK_ENABLE
3639void 4302void ecb_cold
3640ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4303ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3641{ 4304{
3642 int i, j; 4305 int i, j;
3643 ev_watcher_list *wl, *wn; 4306 ev_watcher_list *wl, *wn;
3644 4307
… …
3688 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4351 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3689#endif 4352#endif
3690 4353
3691#if EV_IDLE_ENABLE 4354#if EV_IDLE_ENABLE
3692 if (types & EV_IDLE) 4355 if (types & EV_IDLE)
3693 for (j = NUMPRI; i--; ) 4356 for (j = NUMPRI; j--; )
3694 for (i = idlecnt [j]; i--; ) 4357 for (i = idlecnt [j]; i--; )
3695 cb (EV_A_ EV_IDLE, idles [j][i]); 4358 cb (EV_A_ EV_IDLE, idles [j][i]);
3696#endif 4359#endif
3697 4360
3698#if EV_FORK_ENABLE 4361#if EV_FORK_ENABLE
… …
3706 if (types & EV_ASYNC) 4369 if (types & EV_ASYNC)
3707 for (i = asynccnt; i--; ) 4370 for (i = asynccnt; i--; )
3708 cb (EV_A_ EV_ASYNC, asyncs [i]); 4371 cb (EV_A_ EV_ASYNC, asyncs [i]);
3709#endif 4372#endif
3710 4373
4374#if EV_PREPARE_ENABLE
3711 if (types & EV_PREPARE) 4375 if (types & EV_PREPARE)
3712 for (i = preparecnt; i--; ) 4376 for (i = preparecnt; i--; )
3713#if EV_EMBED_ENABLE 4377# if EV_EMBED_ENABLE
3714 if (ev_cb (prepares [i]) != embed_prepare_cb) 4378 if (ev_cb (prepares [i]) != embed_prepare_cb)
3715#endif 4379# endif
3716 cb (EV_A_ EV_PREPARE, prepares [i]); 4380 cb (EV_A_ EV_PREPARE, prepares [i]);
4381#endif
3717 4382
4383#if EV_CHECK_ENABLE
3718 if (types & EV_CHECK) 4384 if (types & EV_CHECK)
3719 for (i = checkcnt; i--; ) 4385 for (i = checkcnt; i--; )
3720 cb (EV_A_ EV_CHECK, checks [i]); 4386 cb (EV_A_ EV_CHECK, checks [i]);
4387#endif
3721 4388
4389#if EV_SIGNAL_ENABLE
3722 if (types & EV_SIGNAL) 4390 if (types & EV_SIGNAL)
3723 for (i = 0; i < EV_NSIG - 1; ++i) 4391 for (i = 0; i < EV_NSIG - 1; ++i)
3724 for (wl = signals [i].head; wl; ) 4392 for (wl = signals [i].head; wl; )
3725 { 4393 {
3726 wn = wl->next; 4394 wn = wl->next;
3727 cb (EV_A_ EV_SIGNAL, wl); 4395 cb (EV_A_ EV_SIGNAL, wl);
3728 wl = wn; 4396 wl = wn;
3729 } 4397 }
4398#endif
3730 4399
4400#if EV_CHILD_ENABLE
3731 if (types & EV_CHILD) 4401 if (types & EV_CHILD)
3732 for (i = EV_PID_HASHSIZE; i--; ) 4402 for (i = (EV_PID_HASHSIZE); i--; )
3733 for (wl = childs [i]; wl; ) 4403 for (wl = childs [i]; wl; )
3734 { 4404 {
3735 wn = wl->next; 4405 wn = wl->next;
3736 cb (EV_A_ EV_CHILD, wl); 4406 cb (EV_A_ EV_CHILD, wl);
3737 wl = wn; 4407 wl = wn;
3738 } 4408 }
4409#endif
3739/* EV_STAT 0x00001000 /* stat data changed */ 4410/* EV_STAT 0x00001000 /* stat data changed */
3740/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4411/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3741} 4412}
3742#endif 4413#endif
3743 4414
3744#if EV_MULTIPLICITY 4415#if EV_MULTIPLICITY
3745 #include "ev_wrap.h" 4416 #include "ev_wrap.h"
3746#endif 4417#endif
3747 4418
3748#ifdef __cplusplus
3749}
3750#endif
3751

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