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Comparing libev/ev.c (file contents):
Revision 1.329 by root, Tue Feb 16 09:32:39 2010 UTC vs.
Revision 1.398 by root, Sun Sep 25 21:27:35 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
109# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116# define EV_USE_KQUEUE 1 121# ifndef EV_USE_KQUEUE
117# else 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
120# endif 127# endif
121 128
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
125# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
126# define EV_USE_PORT 0
127# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
128# endif 136# endif
129 137
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
133# else
134# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
135# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
136# endif 145# endif
137 146
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1 148# ifndef EV_USE_SIGNALFD
141# else
142# define EV_USE_SIGNALFD 0 149# define EV_USE_SIGNALFD EV_FEATURE_OS
143# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
144# endif 154# endif
145 155
156# if HAVE_EVENTFD
146# ifndef EV_USE_EVENTFD 157# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1 158# define EV_USE_EVENTFD EV_FEATURE_OS
149# else
150# define EV_USE_EVENTFD 0
151# endif 159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
152# endif 163# endif
153 164
154#endif 165#endif
155 166
156#include <math.h>
157#include <stdlib.h> 167#include <stdlib.h>
158#include <string.h> 168#include <string.h>
159#include <fcntl.h> 169#include <fcntl.h>
160#include <stddef.h> 170#include <stddef.h>
161 171
… …
172#ifdef EV_H 182#ifdef EV_H
173# include EV_H 183# include EV_H
174#else 184#else
175# include "ev.h" 185# include "ev.h"
176#endif 186#endif
187
188EV_CPP(extern "C" {)
177 189
178#ifndef _WIN32 190#ifndef _WIN32
179# include <sys/time.h> 191# include <sys/time.h>
180# include <sys/wait.h> 192# include <sys/wait.h>
181# include <unistd.h> 193# include <unistd.h>
… …
184# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
185# include <windows.h> 197# include <windows.h>
186# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
188# endif 200# endif
201# undef EV_AVOID_STDIO
189#endif 202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
190 211
191/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
192 213
193/* try to deduce the maximum number of signals on this platform */ 214/* try to deduce the maximum number of signals on this platform */
194#if defined (EV_NSIG) 215#if defined (EV_NSIG)
… …
206#elif defined (MAXSIG) 227#elif defined (MAXSIG)
207# define EV_NSIG (MAXSIG+1) 228# define EV_NSIG (MAXSIG+1)
208#elif defined (MAX_SIG) 229#elif defined (MAX_SIG)
209# define EV_NSIG (MAX_SIG+1) 230# define EV_NSIG (MAX_SIG+1)
210#elif defined (SIGARRAYSIZE) 231#elif defined (SIGARRAYSIZE)
211# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */ 232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
212#elif defined (_sys_nsig) 233#elif defined (_sys_nsig)
213# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
214#else 235#else
215# error "unable to find value for NSIG, please report" 236# error "unable to find value for NSIG, please report"
216/* to make it compile regardless, just remove the above line */ 237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
217# define EV_NSIG 65 239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
218#endif 244#endif
219 245
220#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
221# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
222# define EV_USE_CLOCK_SYSCALL 1 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
223# else 249# else
224# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
225# endif 251# endif
226#endif 252#endif
227 253
228#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
229# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
230# define EV_USE_MONOTONIC 1 256# define EV_USE_MONOTONIC EV_FEATURE_OS
231# else 257# else
232# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
233# endif 259# endif
234#endif 260#endif
235 261
… …
237# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
238#endif 264#endif
239 265
240#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
241# if _POSIX_C_SOURCE >= 199309L 267# if _POSIX_C_SOURCE >= 199309L
242# define EV_USE_NANOSLEEP 1 268# define EV_USE_NANOSLEEP EV_FEATURE_OS
243# else 269# else
244# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
245# endif 271# endif
246#endif 272#endif
247 273
248#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
249# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
250#endif 276#endif
251 277
252#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
253# ifdef _WIN32 279# ifdef _WIN32
254# define EV_USE_POLL 0 280# define EV_USE_POLL 0
255# else 281# else
256# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
257# endif 283# endif
258#endif 284#endif
259 285
260#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
261# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
262# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
263# else 289# else
264# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
265# endif 291# endif
266#endif 292#endif
267 293
… …
273# define EV_USE_PORT 0 299# define EV_USE_PORT 0
274#endif 300#endif
275 301
276#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
277# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
278# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
279# else 305# else
280# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
281# endif 307# endif
282#endif 308#endif
283 309
284#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
285# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
286# define EV_PID_HASHSIZE 1
287# else
288# define EV_PID_HASHSIZE 16
289# endif
290#endif 312#endif
291 313
292#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
293# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
294# define EV_INOTIFY_HASHSIZE 1
295# else
296# define EV_INOTIFY_HASHSIZE 16
297# endif
298#endif 316#endif
299 317
300#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
302# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
303# else 321# else
304# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
305# endif 323# endif
306#endif 324#endif
307 325
308#ifndef EV_USE_SIGNALFD 326#ifndef EV_USE_SIGNALFD
309# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
310# define EV_USE_SIGNALFD 1 328# define EV_USE_SIGNALFD EV_FEATURE_OS
311# else 329# else
312# define EV_USE_SIGNALFD 0 330# define EV_USE_SIGNALFD 0
313# endif 331# endif
314#endif 332#endif
315 333
… …
318# define EV_USE_4HEAP 1 336# define EV_USE_4HEAP 1
319# define EV_HEAP_CACHE_AT 1 337# define EV_HEAP_CACHE_AT 1
320#endif 338#endif
321 339
322#ifndef EV_VERIFY 340#ifndef EV_VERIFY
323# define EV_VERIFY !EV_MINIMAL 341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
324#endif 342#endif
325 343
326#ifndef EV_USE_4HEAP 344#ifndef EV_USE_4HEAP
327# define EV_USE_4HEAP !EV_MINIMAL 345# define EV_USE_4HEAP EV_FEATURE_DATA
328#endif 346#endif
329 347
330#ifndef EV_HEAP_CACHE_AT 348#ifndef EV_HEAP_CACHE_AT
331# define EV_HEAP_CACHE_AT !EV_MINIMAL 349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
332#endif 350#endif
333 351
334/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
335/* which makes programs even slower. might work on other unices, too. */ 353/* which makes programs even slower. might work on other unices, too. */
336#if EV_USE_CLOCK_SYSCALL 354#if EV_USE_CLOCK_SYSCALL
… …
367# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
368# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
369#endif 387#endif
370 388
371#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
372# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
373# include <sys/select.h> 392# include <sys/select.h>
374# endif 393# endif
375#endif 394#endif
376 395
377#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
378# include <sys/utsname.h>
379# include <sys/statfs.h> 397# include <sys/statfs.h>
380# include <sys/inotify.h> 398# include <sys/inotify.h>
381/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
382# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
383# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
400# define EFD_CLOEXEC O_CLOEXEC 418# define EFD_CLOEXEC O_CLOEXEC
401# else 419# else
402# define EFD_CLOEXEC 02000000 420# define EFD_CLOEXEC 02000000
403# endif 421# endif
404# endif 422# endif
405# ifdef __cplusplus
406extern "C" {
407# endif
408int (eventfd) (unsigned int initval, int flags); 423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
409# ifdef __cplusplus
410}
411# endif
412#endif 424#endif
413 425
414#if EV_USE_SIGNALFD 426#if EV_USE_SIGNALFD
415/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
416# include <stdint.h> 428# include <stdint.h>
… …
422# define SFD_CLOEXEC O_CLOEXEC 434# define SFD_CLOEXEC O_CLOEXEC
423# else 435# else
424# define SFD_CLOEXEC 02000000 436# define SFD_CLOEXEC 02000000
425# endif 437# endif
426# endif 438# endif
427# ifdef __cplusplus
428extern "C" {
429# endif
430int signalfd (int fd, const sigset_t *mask, int flags); 439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
431 440
432struct signalfd_siginfo 441struct signalfd_siginfo
433{ 442{
434 uint32_t ssi_signo; 443 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)]; 444 char pad[128 - sizeof (uint32_t)];
436}; 445};
437# ifdef __cplusplus
438}
439# endif 446#endif
440#endif
441
442 447
443/**/ 448/**/
444 449
445#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
446# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
447#else 452#else
448# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
449#endif 454#endif
450 455
451/* 456/*
452 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
453 * It is added to ev_rt_now when scheduling periodics
454 * to ensure progress, time-wise, even when rounding
455 * errors are against us.
456 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
457 * Better solutions welcome.
458 */ 459 */
459#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
460 462
461#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
462#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
463 465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ECB.H BEGIN */
471/*
472 * libecb - http://software.schmorp.de/pkg/libecb
473 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved.
477 *
478 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met:
480 *
481 * 1. Redistributions of source code must retain the above copyright notice,
482 * this list of conditions and the following disclaimer.
483 *
484 * 2. Redistributions in binary form must reproduce the above copyright
485 * notice, this list of conditions and the following disclaimer in the
486 * documentation and/or other materials provided with the distribution.
487 *
488 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
489 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
490 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
491 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
492 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE.
498 */
499
500#ifndef ECB_H
501#define ECB_H
502
503#ifdef _WIN32
504 typedef signed char int8_t;
505 typedef unsigned char uint8_t;
506 typedef signed short int16_t;
507 typedef unsigned short uint16_t;
508 typedef signed int int32_t;
509 typedef unsigned int uint32_t;
464#if __GNUC__ >= 4 510 #if __GNUC__
465# define expect(expr,value) __builtin_expect ((expr),(value)) 511 typedef signed long long int64_t;
466# define noinline __attribute__ ((noinline)) 512 typedef unsigned long long uint64_t;
513 #else /* _MSC_VER || __BORLANDC__ */
514 typedef signed __int64 int64_t;
515 typedef unsigned __int64 uint64_t;
516 #endif
467#else 517#else
468# define expect(expr,value) (expr) 518 #include <inttypes.h>
469# define noinline
470# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
471# define inline
472# endif 519#endif
520
521/* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place.
527 */
528#ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
530 #define ECB_GCC_VERSION(major,minor) 0
531 #else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
473#endif 533 #endif
534#endif
474 535
536/*****************************************************************************/
537
538/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540
541#if ECB_NO_THREADS || ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0)
543#endif
544
545#ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__)
547 #if __i386__
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
551 #elif __amd64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
563 #endif
564 #endif
565#endif
566
567#ifndef ECB_MEMORY_FENCE
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
569 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32)
578 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
580 #endif
581#endif
582
583#ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS
585 /*
586 * if you get undefined symbol references to pthread_mutex_lock,
587 * or failure to find pthread.h, then you should implement
588 * the ECB_MEMORY_FENCE operations for your cpu/compiler
589 * OR provide pthread.h and link against the posix thread library
590 * of your system.
591 */
592 #include <pthread.h>
593 #define ECB_NEEDS_PTHREADS 1
594 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
595
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif
599#endif
600
601#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603#endif
604
605#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607#endif
608
609/*****************************************************************************/
610
611#define ECB_C99 (__STDC_VERSION__ >= 199901L)
612
613#if __cplusplus
614 #define ecb_inline static inline
615#elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__
617#elif ECB_C99
618 #define ecb_inline static inline
619#else
620 #define ecb_inline static
621#endif
622
623#if ECB_GCC_VERSION(3,3)
624 #define ecb_restrict __restrict__
625#elif ECB_C99
626 #define ecb_restrict restrict
627#else
628 #define ecb_restrict
629#endif
630
631typedef int ecb_bool;
632
633#define ECB_CONCAT_(a, b) a ## b
634#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635#define ECB_STRINGIFY_(a) # a
636#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
637
638#define ecb_function_ ecb_inline
639
640#if ECB_GCC_VERSION(3,1)
641 #define ecb_attribute(attrlist) __attribute__(attrlist)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645#else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
648 #define ecb_expect(expr,value) (expr)
649 #define ecb_prefetch(addr,rw,locality)
650#endif
651
652/* no emulation for ecb_decltype */
653#if ECB_GCC_VERSION(4,5)
654 #define ecb_decltype(x) __decltype(x)
655#elif ECB_GCC_VERSION(3,0)
656 #define ecb_decltype(x) __typeof(x)
657#endif
658
659#define ecb_noinline ecb_attribute ((__noinline__))
660#define ecb_noreturn ecb_attribute ((__noreturn__))
661#define ecb_unused ecb_attribute ((__unused__))
662#define ecb_const ecb_attribute ((__const__))
663#define ecb_pure ecb_attribute ((__pure__))
664
665#if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__))
669#else
670 #define ecb_artificial
671 #define ecb_hot
672 #define ecb_cold
673#endif
674
675/* put around conditional expressions if you are very sure that the */
676/* expression is mostly true or mostly false. note that these return */
677/* booleans, not the expression. */
475#define expect_false(expr) expect ((expr) != 0, 0) 678#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
476#define expect_true(expr) expect ((expr) != 0, 1) 679#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
680/* for compatibility to the rest of the world */
681#define ecb_likely(expr) ecb_expect_true (expr)
682#define ecb_unlikely(expr) ecb_expect_false (expr)
683
684/* count trailing zero bits and count # of one bits */
685#if ECB_GCC_VERSION(3,4)
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */
693#else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
695 ecb_function_ int
696 ecb_ctz32 (uint32_t x)
697 {
698 int r = 0;
699
700 x &= ~x + 1; /* this isolates the lowest bit */
701
702#if ECB_branchless_on_i386
703 r += !!(x & 0xaaaaaaaa) << 0;
704 r += !!(x & 0xcccccccc) << 1;
705 r += !!(x & 0xf0f0f0f0) << 2;
706 r += !!(x & 0xff00ff00) << 3;
707 r += !!(x & 0xffff0000) << 4;
708#else
709 if (x & 0xaaaaaaaa) r += 1;
710 if (x & 0xcccccccc) r += 2;
711 if (x & 0xf0f0f0f0) r += 4;
712 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16;
714#endif
715
716 return r;
717 }
718
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
720 ecb_function_ int
721 ecb_ctz64 (uint64_t x)
722 {
723 int shift = x & 0xffffffffU ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift;
725 }
726
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
728 ecb_function_ int
729 ecb_popcount32 (uint32_t x)
730 {
731 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101;
735
736 return x >> 24;
737 }
738
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
740 ecb_function_ int ecb_ld32 (uint32_t x)
741 {
742 int r = 0;
743
744 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; }
749
750 return r;
751 }
752
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
754 ecb_function_ int ecb_ld64 (uint64_t x)
755 {
756 int r = 0;
757
758 if (x >> 32) { x >>= 32; r += 32; }
759
760 return r + ecb_ld32 (x);
761 }
762#endif
763
764/* popcount64 is only available on 64 bit cpus as gcc builtin */
765/* so for this version we are lazy */
766ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
767ecb_function_ int
768ecb_popcount64 (uint64_t x)
769{
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771}
772
773ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
774ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
775ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
776ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
777ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
778ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
779ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
780ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
781
782ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790
791#if ECB_GCC_VERSION(4,3)
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
793 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x)
795#else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
797 ecb_function_ uint16_t
798 ecb_bswap16 (uint16_t x)
799 {
800 return ecb_rotl16 (x, 8);
801 }
802
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
804 ecb_function_ uint32_t
805 ecb_bswap32 (uint32_t x)
806 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 }
809
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
811 ecb_function_ uint64_t
812 ecb_bswap64 (uint64_t x)
813 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 }
816#endif
817
818#if ECB_GCC_VERSION(4,5)
819 #define ecb_unreachable() __builtin_unreachable ()
820#else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
823 ecb_function_ void ecb_unreachable (void) { }
824#endif
825
826/* try to tell the compiler that some condition is definitely true */
827#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
828
829ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
830ecb_function_ unsigned char
831ecb_byteorder_helper (void)
832{
833 const uint32_t u = 0x11223344;
834 return *(unsigned char *)&u;
835}
836
837ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
839ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
840ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
841
842#if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844#else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
846#endif
847
848#if __cplusplus
849 template<typename T>
850 static inline T ecb_div_rd (T val, T div)
851 {
852 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
853 }
854 template<typename T>
855 static inline T ecb_div_ru (T val, T div)
856 {
857 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
858 }
859#else
860 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
861 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
862#endif
863
864#if ecb_cplusplus_does_not_suck
865 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
866 template<typename T, int N>
867 static inline int ecb_array_length (const T (&arr)[N])
868 {
869 return N;
870 }
871#else
872 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
873#endif
874
875#endif
876
877/* ECB.H END */
878
879#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
880/* if your architecture doesn't need memory fences, e.g. because it is
881 * single-cpu/core, or if you use libev in a project that doesn't use libev
882 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
883 * libev, in which casess the memory fences become nops.
884 * alternatively, you can remove this #error and link against libpthread,
885 * which will then provide the memory fences.
886 */
887# error "memory fences not defined for your architecture, please report"
888#endif
889
890#ifndef ECB_MEMORY_FENCE
891# define ECB_MEMORY_FENCE do { } while (0)
892# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
893# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
894#endif
895
896#define expect_false(cond) ecb_expect_false (cond)
897#define expect_true(cond) ecb_expect_true (cond)
898#define noinline ecb_noinline
899
477#define inline_size static inline 900#define inline_size ecb_inline
478 901
479#if EV_MINIMAL 902#if EV_FEATURE_CODE
903# define inline_speed ecb_inline
904#else
480# define inline_speed static noinline 905# define inline_speed static noinline
481#else
482# define inline_speed static inline
483#endif 906#endif
484 907
485#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 908#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
486 909
487#if EV_MINPRI == EV_MAXPRI 910#if EV_MINPRI == EV_MAXPRI
… …
500#define ev_active(w) ((W)(w))->active 923#define ev_active(w) ((W)(w))->active
501#define ev_at(w) ((WT)(w))->at 924#define ev_at(w) ((WT)(w))->at
502 925
503#if EV_USE_REALTIME 926#if EV_USE_REALTIME
504/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 927/* sig_atomic_t is used to avoid per-thread variables or locking but still */
505/* giving it a reasonably high chance of working on typical architetcures */ 928/* giving it a reasonably high chance of working on typical architectures */
506static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 929static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
507#endif 930#endif
508 931
509#if EV_USE_MONOTONIC 932#if EV_USE_MONOTONIC
510static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 933static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
524# include "ev_win32.c" 947# include "ev_win32.c"
525#endif 948#endif
526 949
527/*****************************************************************************/ 950/*****************************************************************************/
528 951
952/* define a suitable floor function (only used by periodics atm) */
953
954#if EV_USE_FLOOR
955# include <math.h>
956# define ev_floor(v) floor (v)
957#else
958
959#include <float.h>
960
961/* a floor() replacement function, should be independent of ev_tstamp type */
962static ev_tstamp noinline
963ev_floor (ev_tstamp v)
964{
965 /* the choice of shift factor is not terribly important */
966#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
968#else
969 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
970#endif
971
972 /* argument too large for an unsigned long? */
973 if (expect_false (v >= shift))
974 {
975 ev_tstamp f;
976
977 if (v == v - 1.)
978 return v; /* very large number */
979
980 f = shift * ev_floor (v * (1. / shift));
981 return f + ev_floor (v - f);
982 }
983
984 /* special treatment for negative args? */
985 if (expect_false (v < 0.))
986 {
987 ev_tstamp f = -ev_floor (-v);
988
989 return f - (f == v ? 0 : 1);
990 }
991
992 /* fits into an unsigned long */
993 return (unsigned long)v;
994}
995
996#endif
997
998/*****************************************************************************/
999
1000#ifdef __linux
1001# include <sys/utsname.h>
1002#endif
1003
1004static unsigned int noinline ecb_cold
1005ev_linux_version (void)
1006{
1007#ifdef __linux
1008 unsigned int v = 0;
1009 struct utsname buf;
1010 int i;
1011 char *p = buf.release;
1012
1013 if (uname (&buf))
1014 return 0;
1015
1016 for (i = 3+1; --i; )
1017 {
1018 unsigned int c = 0;
1019
1020 for (;;)
1021 {
1022 if (*p >= '0' && *p <= '9')
1023 c = c * 10 + *p++ - '0';
1024 else
1025 {
1026 p += *p == '.';
1027 break;
1028 }
1029 }
1030
1031 v = (v << 8) | c;
1032 }
1033
1034 return v;
1035#else
1036 return 0;
1037#endif
1038}
1039
1040/*****************************************************************************/
1041
1042#if EV_AVOID_STDIO
1043static void noinline ecb_cold
1044ev_printerr (const char *msg)
1045{
1046 write (STDERR_FILENO, msg, strlen (msg));
1047}
1048#endif
1049
529static void (*syserr_cb)(const char *msg); 1050static void (*syserr_cb)(const char *msg);
530 1051
531void 1052void ecb_cold
532ev_set_syserr_cb (void (*cb)(const char *msg)) 1053ev_set_syserr_cb (void (*cb)(const char *msg))
533{ 1054{
534 syserr_cb = cb; 1055 syserr_cb = cb;
535} 1056}
536 1057
537static void noinline 1058static void noinline ecb_cold
538ev_syserr (const char *msg) 1059ev_syserr (const char *msg)
539{ 1060{
540 if (!msg) 1061 if (!msg)
541 msg = "(libev) system error"; 1062 msg = "(libev) system error";
542 1063
543 if (syserr_cb) 1064 if (syserr_cb)
544 syserr_cb (msg); 1065 syserr_cb (msg);
545 else 1066 else
546 { 1067 {
1068#if EV_AVOID_STDIO
1069 ev_printerr (msg);
1070 ev_printerr (": ");
1071 ev_printerr (strerror (errno));
1072 ev_printerr ("\n");
1073#else
547 perror (msg); 1074 perror (msg);
1075#endif
548 abort (); 1076 abort ();
549 } 1077 }
550} 1078}
551 1079
552static void * 1080static void *
553ev_realloc_emul (void *ptr, long size) 1081ev_realloc_emul (void *ptr, long size)
554{ 1082{
1083#if __GLIBC__
1084 return realloc (ptr, size);
1085#else
555 /* some systems, notably openbsd and darwin, fail to properly 1086 /* some systems, notably openbsd and darwin, fail to properly
556 * implement realloc (x, 0) (as required by both ansi c-98 and 1087 * implement realloc (x, 0) (as required by both ansi c-89 and
557 * the single unix specification, so work around them here. 1088 * the single unix specification, so work around them here.
558 */ 1089 */
559 1090
560 if (size) 1091 if (size)
561 return realloc (ptr, size); 1092 return realloc (ptr, size);
562 1093
563 free (ptr); 1094 free (ptr);
564 return 0; 1095 return 0;
1096#endif
565} 1097}
566 1098
567static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1099static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
568 1100
569void 1101void ecb_cold
570ev_set_allocator (void *(*cb)(void *ptr, long size)) 1102ev_set_allocator (void *(*cb)(void *ptr, long size))
571{ 1103{
572 alloc = cb; 1104 alloc = cb;
573} 1105}
574 1106
… …
577{ 1109{
578 ptr = alloc (ptr, size); 1110 ptr = alloc (ptr, size);
579 1111
580 if (!ptr && size) 1112 if (!ptr && size)
581 { 1113 {
1114#if EV_AVOID_STDIO
1115 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1116#else
582 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1117 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1118#endif
583 abort (); 1119 abort ();
584 } 1120 }
585 1121
586 return ptr; 1122 return ptr;
587} 1123}
… …
603 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1139 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
604 unsigned char unused; 1140 unsigned char unused;
605#if EV_USE_EPOLL 1141#if EV_USE_EPOLL
606 unsigned int egen; /* generation counter to counter epoll bugs */ 1142 unsigned int egen; /* generation counter to counter epoll bugs */
607#endif 1143#endif
608#if EV_SELECT_IS_WINSOCKET 1144#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
609 SOCKET handle; 1145 SOCKET handle;
1146#endif
1147#if EV_USE_IOCP
1148 OVERLAPPED or, ow;
610#endif 1149#endif
611} ANFD; 1150} ANFD;
612 1151
613/* stores the pending event set for a given watcher */ 1152/* stores the pending event set for a given watcher */
614typedef struct 1153typedef struct
… …
669 1208
670 static int ev_default_loop_ptr; 1209 static int ev_default_loop_ptr;
671 1210
672#endif 1211#endif
673 1212
674#if EV_MINIMAL < 2 1213#if EV_FEATURE_API
675# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) 1214# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
676# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) 1215# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
677# define EV_INVOKE_PENDING invoke_cb (EV_A) 1216# define EV_INVOKE_PENDING invoke_cb (EV_A)
678#else 1217#else
679# define EV_RELEASE_CB (void)0 1218# define EV_RELEASE_CB (void)0
680# define EV_ACQUIRE_CB (void)0 1219# define EV_ACQUIRE_CB (void)0
681# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1220# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
682#endif 1221#endif
683 1222
684#define EVUNLOOP_RECURSE 0x80 1223#define EVBREAK_RECURSE 0x80
685 1224
686/*****************************************************************************/ 1225/*****************************************************************************/
687 1226
688#ifndef EV_HAVE_EV_TIME 1227#ifndef EV_HAVE_EV_TIME
689ev_tstamp 1228ev_tstamp
… …
733 if (delay > 0.) 1272 if (delay > 0.)
734 { 1273 {
735#if EV_USE_NANOSLEEP 1274#if EV_USE_NANOSLEEP
736 struct timespec ts; 1275 struct timespec ts;
737 1276
738 ts.tv_sec = (time_t)delay; 1277 EV_TS_SET (ts, delay);
739 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
740
741 nanosleep (&ts, 0); 1278 nanosleep (&ts, 0);
742#elif defined(_WIN32) 1279#elif defined(_WIN32)
743 Sleep ((unsigned long)(delay * 1e3)); 1280 Sleep ((unsigned long)(delay * 1e3));
744#else 1281#else
745 struct timeval tv; 1282 struct timeval tv;
746 1283
747 tv.tv_sec = (time_t)delay;
748 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
749
750 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1284 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
751 /* something not guaranteed by newer posix versions, but guaranteed */ 1285 /* something not guaranteed by newer posix versions, but guaranteed */
752 /* by older ones */ 1286 /* by older ones */
1287 EV_TV_SET (tv, delay);
753 select (0, 0, 0, 0, &tv); 1288 select (0, 0, 0, 0, &tv);
754#endif 1289#endif
755 } 1290 }
756} 1291}
757 1292
758/*****************************************************************************/ 1293/*****************************************************************************/
759 1294
760#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1295#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
761 1296
762/* find a suitable new size for the given array, */ 1297/* find a suitable new size for the given array, */
763/* hopefully by rounding to a ncie-to-malloc size */ 1298/* hopefully by rounding to a nice-to-malloc size */
764inline_size int 1299inline_size int
765array_nextsize (int elem, int cur, int cnt) 1300array_nextsize (int elem, int cur, int cnt)
766{ 1301{
767 int ncur = cur + 1; 1302 int ncur = cur + 1;
768 1303
… …
780 } 1315 }
781 1316
782 return ncur; 1317 return ncur;
783} 1318}
784 1319
785static noinline void * 1320static void * noinline ecb_cold
786array_realloc (int elem, void *base, int *cur, int cnt) 1321array_realloc (int elem, void *base, int *cur, int cnt)
787{ 1322{
788 *cur = array_nextsize (elem, *cur, cnt); 1323 *cur = array_nextsize (elem, *cur, cnt);
789 return ev_realloc (base, elem * *cur); 1324 return ev_realloc (base, elem * *cur);
790} 1325}
… …
793 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1328 memset ((void *)(base), 0, sizeof (*(base)) * (count))
794 1329
795#define array_needsize(type,base,cur,cnt,init) \ 1330#define array_needsize(type,base,cur,cnt,init) \
796 if (expect_false ((cnt) > (cur))) \ 1331 if (expect_false ((cnt) > (cur))) \
797 { \ 1332 { \
798 int ocur_ = (cur); \ 1333 int ecb_unused ocur_ = (cur); \
799 (base) = (type *)array_realloc \ 1334 (base) = (type *)array_realloc \
800 (sizeof (type), (base), &(cur), (cnt)); \ 1335 (sizeof (type), (base), &(cur), (cnt)); \
801 init ((base) + (ocur_), (cur) - ocur_); \ 1336 init ((base) + (ocur_), (cur) - ocur_); \
802 } 1337 }
803 1338
… …
864} 1399}
865 1400
866/*****************************************************************************/ 1401/*****************************************************************************/
867 1402
868inline_speed void 1403inline_speed void
869fd_event_nc (EV_P_ int fd, int revents) 1404fd_event_nocheck (EV_P_ int fd, int revents)
870{ 1405{
871 ANFD *anfd = anfds + fd; 1406 ANFD *anfd = anfds + fd;
872 ev_io *w; 1407 ev_io *w;
873 1408
874 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1409 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
886fd_event (EV_P_ int fd, int revents) 1421fd_event (EV_P_ int fd, int revents)
887{ 1422{
888 ANFD *anfd = anfds + fd; 1423 ANFD *anfd = anfds + fd;
889 1424
890 if (expect_true (!anfd->reify)) 1425 if (expect_true (!anfd->reify))
891 fd_event_nc (EV_A_ fd, revents); 1426 fd_event_nocheck (EV_A_ fd, revents);
892} 1427}
893 1428
894void 1429void
895ev_feed_fd_event (EV_P_ int fd, int revents) 1430ev_feed_fd_event (EV_P_ int fd, int revents)
896{ 1431{
897 if (fd >= 0 && fd < anfdmax) 1432 if (fd >= 0 && fd < anfdmax)
898 fd_event_nc (EV_A_ fd, revents); 1433 fd_event_nocheck (EV_A_ fd, revents);
899} 1434}
900 1435
901/* make sure the external fd watch events are in-sync */ 1436/* make sure the external fd watch events are in-sync */
902/* with the kernel/libev internal state */ 1437/* with the kernel/libev internal state */
903inline_size void 1438inline_size void
904fd_reify (EV_P) 1439fd_reify (EV_P)
905{ 1440{
906 int i; 1441 int i;
907 1442
1443#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1444 for (i = 0; i < fdchangecnt; ++i)
1445 {
1446 int fd = fdchanges [i];
1447 ANFD *anfd = anfds + fd;
1448
1449 if (anfd->reify & EV__IOFDSET && anfd->head)
1450 {
1451 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1452
1453 if (handle != anfd->handle)
1454 {
1455 unsigned long arg;
1456
1457 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1458
1459 /* handle changed, but fd didn't - we need to do it in two steps */
1460 backend_modify (EV_A_ fd, anfd->events, 0);
1461 anfd->events = 0;
1462 anfd->handle = handle;
1463 }
1464 }
1465 }
1466#endif
1467
908 for (i = 0; i < fdchangecnt; ++i) 1468 for (i = 0; i < fdchangecnt; ++i)
909 { 1469 {
910 int fd = fdchanges [i]; 1470 int fd = fdchanges [i];
911 ANFD *anfd = anfds + fd; 1471 ANFD *anfd = anfds + fd;
912 ev_io *w; 1472 ev_io *w;
913 1473
914 unsigned char events = 0; 1474 unsigned char o_events = anfd->events;
1475 unsigned char o_reify = anfd->reify;
915 1476
916 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1477 anfd->reify = 0;
917 events |= (unsigned char)w->events;
918 1478
919#if EV_SELECT_IS_WINSOCKET 1479 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
920 if (events)
921 { 1480 {
922 unsigned long arg; 1481 anfd->events = 0;
923 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1482
924 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1483 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1484 anfd->events |= (unsigned char)w->events;
1485
1486 if (o_events != anfd->events)
1487 o_reify = EV__IOFDSET; /* actually |= */
925 } 1488 }
926#endif
927 1489
928 { 1490 if (o_reify & EV__IOFDSET)
929 unsigned char o_events = anfd->events;
930 unsigned char o_reify = anfd->reify;
931
932 anfd->reify = 0;
933 anfd->events = events;
934
935 if (o_events != events || o_reify & EV__IOFDSET)
936 backend_modify (EV_A_ fd, o_events, events); 1491 backend_modify (EV_A_ fd, o_events, anfd->events);
937 }
938 } 1492 }
939 1493
940 fdchangecnt = 0; 1494 fdchangecnt = 0;
941} 1495}
942 1496
… …
954 fdchanges [fdchangecnt - 1] = fd; 1508 fdchanges [fdchangecnt - 1] = fd;
955 } 1509 }
956} 1510}
957 1511
958/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1512/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
959inline_speed void 1513inline_speed void ecb_cold
960fd_kill (EV_P_ int fd) 1514fd_kill (EV_P_ int fd)
961{ 1515{
962 ev_io *w; 1516 ev_io *w;
963 1517
964 while ((w = (ev_io *)anfds [fd].head)) 1518 while ((w = (ev_io *)anfds [fd].head))
… …
966 ev_io_stop (EV_A_ w); 1520 ev_io_stop (EV_A_ w);
967 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1521 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
968 } 1522 }
969} 1523}
970 1524
971/* check whether the given fd is atcually valid, for error recovery */ 1525/* check whether the given fd is actually valid, for error recovery */
972inline_size int 1526inline_size int ecb_cold
973fd_valid (int fd) 1527fd_valid (int fd)
974{ 1528{
975#ifdef _WIN32 1529#ifdef _WIN32
976 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1530 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
977#else 1531#else
978 return fcntl (fd, F_GETFD) != -1; 1532 return fcntl (fd, F_GETFD) != -1;
979#endif 1533#endif
980} 1534}
981 1535
982/* called on EBADF to verify fds */ 1536/* called on EBADF to verify fds */
983static void noinline 1537static void noinline ecb_cold
984fd_ebadf (EV_P) 1538fd_ebadf (EV_P)
985{ 1539{
986 int fd; 1540 int fd;
987 1541
988 for (fd = 0; fd < anfdmax; ++fd) 1542 for (fd = 0; fd < anfdmax; ++fd)
… …
990 if (!fd_valid (fd) && errno == EBADF) 1544 if (!fd_valid (fd) && errno == EBADF)
991 fd_kill (EV_A_ fd); 1545 fd_kill (EV_A_ fd);
992} 1546}
993 1547
994/* called on ENOMEM in select/poll to kill some fds and retry */ 1548/* called on ENOMEM in select/poll to kill some fds and retry */
995static void noinline 1549static void noinline ecb_cold
996fd_enomem (EV_P) 1550fd_enomem (EV_P)
997{ 1551{
998 int fd; 1552 int fd;
999 1553
1000 for (fd = anfdmax; fd--; ) 1554 for (fd = anfdmax; fd--; )
… …
1018 anfds [fd].emask = 0; 1572 anfds [fd].emask = 0;
1019 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); 1573 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1020 } 1574 }
1021} 1575}
1022 1576
1577/* used to prepare libev internal fd's */
1578/* this is not fork-safe */
1579inline_speed void
1580fd_intern (int fd)
1581{
1582#ifdef _WIN32
1583 unsigned long arg = 1;
1584 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1585#else
1586 fcntl (fd, F_SETFD, FD_CLOEXEC);
1587 fcntl (fd, F_SETFL, O_NONBLOCK);
1588#endif
1589}
1590
1023/*****************************************************************************/ 1591/*****************************************************************************/
1024 1592
1025/* 1593/*
1026 * the heap functions want a real array index. array index 0 uis guaranteed to not 1594 * the heap functions want a real array index. array index 0 is guaranteed to not
1027 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1595 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1028 * the branching factor of the d-tree. 1596 * the branching factor of the d-tree.
1029 */ 1597 */
1030 1598
1031/* 1599/*
… …
1179 1747
1180static ANSIG signals [EV_NSIG - 1]; 1748static ANSIG signals [EV_NSIG - 1];
1181 1749
1182/*****************************************************************************/ 1750/*****************************************************************************/
1183 1751
1184/* used to prepare libev internal fd's */ 1752#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1185/* this is not fork-safe */
1186inline_speed void
1187fd_intern (int fd)
1188{
1189#ifdef _WIN32
1190 unsigned long arg = 1;
1191 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1192#else
1193 fcntl (fd, F_SETFD, FD_CLOEXEC);
1194 fcntl (fd, F_SETFL, O_NONBLOCK);
1195#endif
1196}
1197 1753
1198static void noinline 1754static void noinline ecb_cold
1199evpipe_init (EV_P) 1755evpipe_init (EV_P)
1200{ 1756{
1201 if (!ev_is_active (&pipe_w)) 1757 if (!ev_is_active (&pipe_w))
1202 { 1758 {
1203#if EV_USE_EVENTFD 1759# if EV_USE_EVENTFD
1204 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 1760 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1205 if (evfd < 0 && errno == EINVAL) 1761 if (evfd < 0 && errno == EINVAL)
1206 evfd = eventfd (0, 0); 1762 evfd = eventfd (0, 0);
1207 1763
1208 if (evfd >= 0) 1764 if (evfd >= 0)
… …
1210 evpipe [0] = -1; 1766 evpipe [0] = -1;
1211 fd_intern (evfd); /* doing it twice doesn't hurt */ 1767 fd_intern (evfd); /* doing it twice doesn't hurt */
1212 ev_io_set (&pipe_w, evfd, EV_READ); 1768 ev_io_set (&pipe_w, evfd, EV_READ);
1213 } 1769 }
1214 else 1770 else
1215#endif 1771# endif
1216 { 1772 {
1217 while (pipe (evpipe)) 1773 while (pipe (evpipe))
1218 ev_syserr ("(libev) error creating signal/async pipe"); 1774 ev_syserr ("(libev) error creating signal/async pipe");
1219 1775
1220 fd_intern (evpipe [0]); 1776 fd_intern (evpipe [0]);
… …
1225 ev_io_start (EV_A_ &pipe_w); 1781 ev_io_start (EV_A_ &pipe_w);
1226 ev_unref (EV_A); /* watcher should not keep loop alive */ 1782 ev_unref (EV_A); /* watcher should not keep loop alive */
1227 } 1783 }
1228} 1784}
1229 1785
1230inline_size void 1786inline_speed void
1231evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1787evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1232{ 1788{
1233 if (!*flag) 1789 if (expect_true (*flag))
1790 return;
1791
1792 *flag = 1;
1793
1794 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1795
1796 pipe_write_skipped = 1;
1797
1798 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1799
1800 if (pipe_write_wanted)
1234 { 1801 {
1802 int old_errno;
1803
1804 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1805
1235 int old_errno = errno; /* save errno because write might clobber it */ 1806 old_errno = errno; /* save errno because write will clobber it */
1236
1237 *flag = 1;
1238 1807
1239#if EV_USE_EVENTFD 1808#if EV_USE_EVENTFD
1240 if (evfd >= 0) 1809 if (evfd >= 0)
1241 { 1810 {
1242 uint64_t counter = 1; 1811 uint64_t counter = 1;
1243 write (evfd, &counter, sizeof (uint64_t)); 1812 write (evfd, &counter, sizeof (uint64_t));
1244 } 1813 }
1245 else 1814 else
1246#endif 1815#endif
1816 {
1817 /* win32 people keep sending patches that change this write() to send() */
1818 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1819 /* so when you think this write should be a send instead, please find out */
1820 /* where your send() is from - it's definitely not the microsoft send, and */
1821 /* tell me. thank you. */
1247 write (evpipe [1], &old_errno, 1); 1822 write (evpipe [1], &(evpipe [1]), 1);
1823 }
1248 1824
1249 errno = old_errno; 1825 errno = old_errno;
1250 } 1826 }
1251} 1827}
1252 1828
… …
1255static void 1831static void
1256pipecb (EV_P_ ev_io *iow, int revents) 1832pipecb (EV_P_ ev_io *iow, int revents)
1257{ 1833{
1258 int i; 1834 int i;
1259 1835
1836 if (revents & EV_READ)
1837 {
1260#if EV_USE_EVENTFD 1838#if EV_USE_EVENTFD
1261 if (evfd >= 0) 1839 if (evfd >= 0)
1262 { 1840 {
1263 uint64_t counter; 1841 uint64_t counter;
1264 read (evfd, &counter, sizeof (uint64_t)); 1842 read (evfd, &counter, sizeof (uint64_t));
1265 } 1843 }
1266 else 1844 else
1267#endif 1845#endif
1268 { 1846 {
1269 char dummy; 1847 char dummy;
1848 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1270 read (evpipe [0], &dummy, 1); 1849 read (evpipe [0], &dummy, 1);
1850 }
1271 } 1851 }
1272 1852
1853 pipe_write_skipped = 0;
1854
1855#if EV_SIGNAL_ENABLE
1273 if (sig_pending) 1856 if (sig_pending)
1274 { 1857 {
1275 sig_pending = 0; 1858 sig_pending = 0;
1276 1859
1277 for (i = EV_NSIG - 1; i--; ) 1860 for (i = EV_NSIG - 1; i--; )
1278 if (expect_false (signals [i].pending)) 1861 if (expect_false (signals [i].pending))
1279 ev_feed_signal_event (EV_A_ i + 1); 1862 ev_feed_signal_event (EV_A_ i + 1);
1280 } 1863 }
1864#endif
1281 1865
1282#if EV_ASYNC_ENABLE 1866#if EV_ASYNC_ENABLE
1283 if (async_pending) 1867 if (async_pending)
1284 { 1868 {
1285 async_pending = 0; 1869 async_pending = 0;
… …
1294#endif 1878#endif
1295} 1879}
1296 1880
1297/*****************************************************************************/ 1881/*****************************************************************************/
1298 1882
1883void
1884ev_feed_signal (int signum)
1885{
1886#if EV_MULTIPLICITY
1887 EV_P = signals [signum - 1].loop;
1888
1889 if (!EV_A)
1890 return;
1891#endif
1892
1893 if (!ev_active (&pipe_w))
1894 return;
1895
1896 signals [signum - 1].pending = 1;
1897 evpipe_write (EV_A_ &sig_pending);
1898}
1899
1299static void 1900static void
1300ev_sighandler (int signum) 1901ev_sighandler (int signum)
1301{ 1902{
1302#if EV_MULTIPLICITY
1303 EV_P = signals [signum - 1].loop;
1304#endif
1305
1306#ifdef _WIN32 1903#ifdef _WIN32
1307 signal (signum, ev_sighandler); 1904 signal (signum, ev_sighandler);
1308#endif 1905#endif
1309 1906
1310 signals [signum - 1].pending = 1; 1907 ev_feed_signal (signum);
1311 evpipe_write (EV_A_ &sig_pending);
1312} 1908}
1313 1909
1314void noinline 1910void noinline
1315ev_feed_signal_event (EV_P_ int signum) 1911ev_feed_signal_event (EV_P_ int signum)
1316{ 1912{
… …
1353 break; 1949 break;
1354 } 1950 }
1355} 1951}
1356#endif 1952#endif
1357 1953
1954#endif
1955
1358/*****************************************************************************/ 1956/*****************************************************************************/
1359 1957
1958#if EV_CHILD_ENABLE
1360static WL childs [EV_PID_HASHSIZE]; 1959static WL childs [EV_PID_HASHSIZE];
1361
1362#ifndef _WIN32
1363 1960
1364static ev_signal childev; 1961static ev_signal childev;
1365 1962
1366#ifndef WIFCONTINUED 1963#ifndef WIFCONTINUED
1367# define WIFCONTINUED(status) 0 1964# define WIFCONTINUED(status) 0
… …
1372child_reap (EV_P_ int chain, int pid, int status) 1969child_reap (EV_P_ int chain, int pid, int status)
1373{ 1970{
1374 ev_child *w; 1971 ev_child *w;
1375 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1972 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1376 1973
1377 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1974 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1378 { 1975 {
1379 if ((w->pid == pid || !w->pid) 1976 if ((w->pid == pid || !w->pid)
1380 && (!traced || (w->flags & 1))) 1977 && (!traced || (w->flags & 1)))
1381 { 1978 {
1382 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1979 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1407 /* make sure we are called again until all children have been reaped */ 2004 /* make sure we are called again until all children have been reaped */
1408 /* we need to do it this way so that the callback gets called before we continue */ 2005 /* we need to do it this way so that the callback gets called before we continue */
1409 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2006 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1410 2007
1411 child_reap (EV_A_ pid, pid, status); 2008 child_reap (EV_A_ pid, pid, status);
1412 if (EV_PID_HASHSIZE > 1) 2009 if ((EV_PID_HASHSIZE) > 1)
1413 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2010 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1414} 2011}
1415 2012
1416#endif 2013#endif
1417 2014
1418/*****************************************************************************/ 2015/*****************************************************************************/
1419 2016
2017#if EV_USE_IOCP
2018# include "ev_iocp.c"
2019#endif
1420#if EV_USE_PORT 2020#if EV_USE_PORT
1421# include "ev_port.c" 2021# include "ev_port.c"
1422#endif 2022#endif
1423#if EV_USE_KQUEUE 2023#if EV_USE_KQUEUE
1424# include "ev_kqueue.c" 2024# include "ev_kqueue.c"
… …
1431#endif 2031#endif
1432#if EV_USE_SELECT 2032#if EV_USE_SELECT
1433# include "ev_select.c" 2033# include "ev_select.c"
1434#endif 2034#endif
1435 2035
1436int 2036int ecb_cold
1437ev_version_major (void) 2037ev_version_major (void)
1438{ 2038{
1439 return EV_VERSION_MAJOR; 2039 return EV_VERSION_MAJOR;
1440} 2040}
1441 2041
1442int 2042int ecb_cold
1443ev_version_minor (void) 2043ev_version_minor (void)
1444{ 2044{
1445 return EV_VERSION_MINOR; 2045 return EV_VERSION_MINOR;
1446} 2046}
1447 2047
1448/* return true if we are running with elevated privileges and should ignore env variables */ 2048/* return true if we are running with elevated privileges and should ignore env variables */
1449int inline_size 2049int inline_size ecb_cold
1450enable_secure (void) 2050enable_secure (void)
1451{ 2051{
1452#ifdef _WIN32 2052#ifdef _WIN32
1453 return 0; 2053 return 0;
1454#else 2054#else
1455 return getuid () != geteuid () 2055 return getuid () != geteuid ()
1456 || getgid () != getegid (); 2056 || getgid () != getegid ();
1457#endif 2057#endif
1458} 2058}
1459 2059
1460unsigned int 2060unsigned int ecb_cold
1461ev_supported_backends (void) 2061ev_supported_backends (void)
1462{ 2062{
1463 unsigned int flags = 0; 2063 unsigned int flags = 0;
1464 2064
1465 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2065 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1469 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2069 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1470 2070
1471 return flags; 2071 return flags;
1472} 2072}
1473 2073
1474unsigned int 2074unsigned int ecb_cold
1475ev_recommended_backends (void) 2075ev_recommended_backends (void)
1476{ 2076{
1477 unsigned int flags = ev_supported_backends (); 2077 unsigned int flags = ev_supported_backends ();
1478 2078
1479#ifndef __NetBSD__ 2079#ifndef __NetBSD__
… …
1484#ifdef __APPLE__ 2084#ifdef __APPLE__
1485 /* only select works correctly on that "unix-certified" platform */ 2085 /* only select works correctly on that "unix-certified" platform */
1486 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2086 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1487 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2087 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1488#endif 2088#endif
2089#ifdef __FreeBSD__
2090 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2091#endif
1489 2092
1490 return flags; 2093 return flags;
1491} 2094}
1492 2095
1493unsigned int 2096unsigned int ecb_cold
1494ev_embeddable_backends (void) 2097ev_embeddable_backends (void)
1495{ 2098{
1496 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2099 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1497 2100
1498 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2101 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1499 /* please fix it and tell me how to detect the fix */ 2102 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1500 flags &= ~EVBACKEND_EPOLL; 2103 flags &= ~EVBACKEND_EPOLL;
1501 2104
1502 return flags; 2105 return flags;
1503} 2106}
1504 2107
1505unsigned int 2108unsigned int
1506ev_backend (EV_P) 2109ev_backend (EV_P)
1507{ 2110{
1508 return backend; 2111 return backend;
1509} 2112}
1510 2113
1511#if EV_MINIMAL < 2 2114#if EV_FEATURE_API
1512unsigned int 2115unsigned int
1513ev_loop_count (EV_P) 2116ev_iteration (EV_P)
1514{ 2117{
1515 return loop_count; 2118 return loop_count;
1516} 2119}
1517 2120
1518unsigned int 2121unsigned int
1519ev_loop_depth (EV_P) 2122ev_depth (EV_P)
1520{ 2123{
1521 return loop_depth; 2124 return loop_depth;
1522} 2125}
1523 2126
1524void 2127void
… …
1543ev_userdata (EV_P) 2146ev_userdata (EV_P)
1544{ 2147{
1545 return userdata; 2148 return userdata;
1546} 2149}
1547 2150
2151void
1548void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2152ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1549{ 2153{
1550 invoke_cb = invoke_pending_cb; 2154 invoke_cb = invoke_pending_cb;
1551} 2155}
1552 2156
2157void
1553void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2158ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1554{ 2159{
1555 release_cb = release; 2160 release_cb = release;
1556 acquire_cb = acquire; 2161 acquire_cb = acquire;
1557} 2162}
1558#endif 2163#endif
1559 2164
1560/* initialise a loop structure, must be zero-initialised */ 2165/* initialise a loop structure, must be zero-initialised */
1561static void noinline 2166static void noinline ecb_cold
1562loop_init (EV_P_ unsigned int flags) 2167loop_init (EV_P_ unsigned int flags)
1563{ 2168{
1564 if (!backend) 2169 if (!backend)
1565 { 2170 {
2171 origflags = flags;
2172
1566#if EV_USE_REALTIME 2173#if EV_USE_REALTIME
1567 if (!have_realtime) 2174 if (!have_realtime)
1568 { 2175 {
1569 struct timespec ts; 2176 struct timespec ts;
1570 2177
… …
1592 if (!(flags & EVFLAG_NOENV) 2199 if (!(flags & EVFLAG_NOENV)
1593 && !enable_secure () 2200 && !enable_secure ()
1594 && getenv ("LIBEV_FLAGS")) 2201 && getenv ("LIBEV_FLAGS"))
1595 flags = atoi (getenv ("LIBEV_FLAGS")); 2202 flags = atoi (getenv ("LIBEV_FLAGS"));
1596 2203
1597 ev_rt_now = ev_time (); 2204 ev_rt_now = ev_time ();
1598 mn_now = get_clock (); 2205 mn_now = get_clock ();
1599 now_floor = mn_now; 2206 now_floor = mn_now;
1600 rtmn_diff = ev_rt_now - mn_now; 2207 rtmn_diff = ev_rt_now - mn_now;
1601#if EV_MINIMAL < 2 2208#if EV_FEATURE_API
1602 invoke_cb = ev_invoke_pending; 2209 invoke_cb = ev_invoke_pending;
1603#endif 2210#endif
1604 2211
1605 io_blocktime = 0.; 2212 io_blocktime = 0.;
1606 timeout_blocktime = 0.; 2213 timeout_blocktime = 0.;
1607 backend = 0; 2214 backend = 0;
1608 backend_fd = -1; 2215 backend_fd = -1;
1609 sig_pending = 0; 2216 sig_pending = 0;
1610#if EV_ASYNC_ENABLE 2217#if EV_ASYNC_ENABLE
1611 async_pending = 0; 2218 async_pending = 0;
1612#endif 2219#endif
2220 pipe_write_skipped = 0;
2221 pipe_write_wanted = 0;
1613#if EV_USE_INOTIFY 2222#if EV_USE_INOTIFY
1614 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2223 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1615#endif 2224#endif
1616#if EV_USE_SIGNALFD 2225#if EV_USE_SIGNALFD
1617 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2226 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1618#endif 2227#endif
1619 2228
1620 if (!(flags & 0x0000ffffU)) 2229 if (!(flags & EVBACKEND_MASK))
1621 flags |= ev_recommended_backends (); 2230 flags |= ev_recommended_backends ();
1622 2231
2232#if EV_USE_IOCP
2233 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2234#endif
1623#if EV_USE_PORT 2235#if EV_USE_PORT
1624 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2236 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1625#endif 2237#endif
1626#if EV_USE_KQUEUE 2238#if EV_USE_KQUEUE
1627 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2239 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1636 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2248 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1637#endif 2249#endif
1638 2250
1639 ev_prepare_init (&pending_w, pendingcb); 2251 ev_prepare_init (&pending_w, pendingcb);
1640 2252
2253#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1641 ev_init (&pipe_w, pipecb); 2254 ev_init (&pipe_w, pipecb);
1642 ev_set_priority (&pipe_w, EV_MAXPRI); 2255 ev_set_priority (&pipe_w, EV_MAXPRI);
2256#endif
1643 } 2257 }
1644} 2258}
1645 2259
1646/* free up a loop structure */ 2260/* free up a loop structure */
1647static void noinline 2261void ecb_cold
1648loop_destroy (EV_P) 2262ev_loop_destroy (EV_P)
1649{ 2263{
1650 int i; 2264 int i;
2265
2266#if EV_MULTIPLICITY
2267 /* mimic free (0) */
2268 if (!EV_A)
2269 return;
2270#endif
2271
2272#if EV_CLEANUP_ENABLE
2273 /* queue cleanup watchers (and execute them) */
2274 if (expect_false (cleanupcnt))
2275 {
2276 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2277 EV_INVOKE_PENDING;
2278 }
2279#endif
2280
2281#if EV_CHILD_ENABLE
2282 if (ev_is_active (&childev))
2283 {
2284 ev_ref (EV_A); /* child watcher */
2285 ev_signal_stop (EV_A_ &childev);
2286 }
2287#endif
1651 2288
1652 if (ev_is_active (&pipe_w)) 2289 if (ev_is_active (&pipe_w))
1653 { 2290 {
1654 /*ev_ref (EV_A);*/ 2291 /*ev_ref (EV_A);*/
1655 /*ev_io_stop (EV_A_ &pipe_w);*/ 2292 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1677#endif 2314#endif
1678 2315
1679 if (backend_fd >= 0) 2316 if (backend_fd >= 0)
1680 close (backend_fd); 2317 close (backend_fd);
1681 2318
2319#if EV_USE_IOCP
2320 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2321#endif
1682#if EV_USE_PORT 2322#if EV_USE_PORT
1683 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2323 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1684#endif 2324#endif
1685#if EV_USE_KQUEUE 2325#if EV_USE_KQUEUE
1686 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2326 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1713 array_free (periodic, EMPTY); 2353 array_free (periodic, EMPTY);
1714#endif 2354#endif
1715#if EV_FORK_ENABLE 2355#if EV_FORK_ENABLE
1716 array_free (fork, EMPTY); 2356 array_free (fork, EMPTY);
1717#endif 2357#endif
2358#if EV_CLEANUP_ENABLE
2359 array_free (cleanup, EMPTY);
2360#endif
1718 array_free (prepare, EMPTY); 2361 array_free (prepare, EMPTY);
1719 array_free (check, EMPTY); 2362 array_free (check, EMPTY);
1720#if EV_ASYNC_ENABLE 2363#if EV_ASYNC_ENABLE
1721 array_free (async, EMPTY); 2364 array_free (async, EMPTY);
1722#endif 2365#endif
1723 2366
1724 backend = 0; 2367 backend = 0;
2368
2369#if EV_MULTIPLICITY
2370 if (ev_is_default_loop (EV_A))
2371#endif
2372 ev_default_loop_ptr = 0;
2373#if EV_MULTIPLICITY
2374 else
2375 ev_free (EV_A);
2376#endif
1725} 2377}
1726 2378
1727#if EV_USE_INOTIFY 2379#if EV_USE_INOTIFY
1728inline_size void infy_fork (EV_P); 2380inline_size void infy_fork (EV_P);
1729#endif 2381#endif
… …
1744 infy_fork (EV_A); 2396 infy_fork (EV_A);
1745#endif 2397#endif
1746 2398
1747 if (ev_is_active (&pipe_w)) 2399 if (ev_is_active (&pipe_w))
1748 { 2400 {
1749 /* this "locks" the handlers against writing to the pipe */ 2401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1750 /* while we modify the fd vars */
1751 sig_pending = 1;
1752#if EV_ASYNC_ENABLE
1753 async_pending = 1;
1754#endif
1755 2402
1756 ev_ref (EV_A); 2403 ev_ref (EV_A);
1757 ev_io_stop (EV_A_ &pipe_w); 2404 ev_io_stop (EV_A_ &pipe_w);
1758 2405
1759#if EV_USE_EVENTFD 2406#if EV_USE_EVENTFD
… …
1765 { 2412 {
1766 EV_WIN32_CLOSE_FD (evpipe [0]); 2413 EV_WIN32_CLOSE_FD (evpipe [0]);
1767 EV_WIN32_CLOSE_FD (evpipe [1]); 2414 EV_WIN32_CLOSE_FD (evpipe [1]);
1768 } 2415 }
1769 2416
2417#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1770 evpipe_init (EV_A); 2418 evpipe_init (EV_A);
1771 /* now iterate over everything, in case we missed something */ 2419 /* now iterate over everything, in case we missed something */
1772 pipecb (EV_A_ &pipe_w, EV_READ); 2420 pipecb (EV_A_ &pipe_w, EV_READ);
2421#endif
1773 } 2422 }
1774 2423
1775 postfork = 0; 2424 postfork = 0;
1776} 2425}
1777 2426
1778#if EV_MULTIPLICITY 2427#if EV_MULTIPLICITY
1779 2428
1780struct ev_loop * 2429struct ev_loop * ecb_cold
1781ev_loop_new (unsigned int flags) 2430ev_loop_new (unsigned int flags)
1782{ 2431{
1783 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2432 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1784 2433
1785 memset (EV_A, 0, sizeof (struct ev_loop)); 2434 memset (EV_A, 0, sizeof (struct ev_loop));
1786 loop_init (EV_A_ flags); 2435 loop_init (EV_A_ flags);
1787 2436
1788 if (ev_backend (EV_A)) 2437 if (ev_backend (EV_A))
1789 return EV_A; 2438 return EV_A;
1790 2439
2440 ev_free (EV_A);
1791 return 0; 2441 return 0;
1792} 2442}
1793 2443
1794void
1795ev_loop_destroy (EV_P)
1796{
1797 loop_destroy (EV_A);
1798 ev_free (loop);
1799}
1800
1801void
1802ev_loop_fork (EV_P)
1803{
1804 postfork = 1; /* must be in line with ev_default_fork */
1805}
1806#endif /* multiplicity */ 2444#endif /* multiplicity */
1807 2445
1808#if EV_VERIFY 2446#if EV_VERIFY
1809static void noinline 2447static void noinline ecb_cold
1810verify_watcher (EV_P_ W w) 2448verify_watcher (EV_P_ W w)
1811{ 2449{
1812 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2450 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1813 2451
1814 if (w->pending) 2452 if (w->pending)
1815 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2453 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1816} 2454}
1817 2455
1818static void noinline 2456static void noinline ecb_cold
1819verify_heap (EV_P_ ANHE *heap, int N) 2457verify_heap (EV_P_ ANHE *heap, int N)
1820{ 2458{
1821 int i; 2459 int i;
1822 2460
1823 for (i = HEAP0; i < N + HEAP0; ++i) 2461 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1828 2466
1829 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1830 } 2468 }
1831} 2469}
1832 2470
1833static void noinline 2471static void noinline ecb_cold
1834array_verify (EV_P_ W *ws, int cnt) 2472array_verify (EV_P_ W *ws, int cnt)
1835{ 2473{
1836 while (cnt--) 2474 while (cnt--)
1837 { 2475 {
1838 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2476 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1839 verify_watcher (EV_A_ ws [cnt]); 2477 verify_watcher (EV_A_ ws [cnt]);
1840 } 2478 }
1841} 2479}
1842#endif 2480#endif
1843 2481
1844#if EV_MINIMAL < 2 2482#if EV_FEATURE_API
1845void 2483void ecb_cold
1846ev_loop_verify (EV_P) 2484ev_verify (EV_P)
1847{ 2485{
1848#if EV_VERIFY 2486#if EV_VERIFY
1849 int i; 2487 int i;
1850 WL w; 2488 WL w;
1851 2489
… …
1885#if EV_FORK_ENABLE 2523#if EV_FORK_ENABLE
1886 assert (forkmax >= forkcnt); 2524 assert (forkmax >= forkcnt);
1887 array_verify (EV_A_ (W *)forks, forkcnt); 2525 array_verify (EV_A_ (W *)forks, forkcnt);
1888#endif 2526#endif
1889 2527
2528#if EV_CLEANUP_ENABLE
2529 assert (cleanupmax >= cleanupcnt);
2530 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2531#endif
2532
1890#if EV_ASYNC_ENABLE 2533#if EV_ASYNC_ENABLE
1891 assert (asyncmax >= asynccnt); 2534 assert (asyncmax >= asynccnt);
1892 array_verify (EV_A_ (W *)asyncs, asynccnt); 2535 array_verify (EV_A_ (W *)asyncs, asynccnt);
1893#endif 2536#endif
1894 2537
2538#if EV_PREPARE_ENABLE
1895 assert (preparemax >= preparecnt); 2539 assert (preparemax >= preparecnt);
1896 array_verify (EV_A_ (W *)prepares, preparecnt); 2540 array_verify (EV_A_ (W *)prepares, preparecnt);
2541#endif
1897 2542
2543#if EV_CHECK_ENABLE
1898 assert (checkmax >= checkcnt); 2544 assert (checkmax >= checkcnt);
1899 array_verify (EV_A_ (W *)checks, checkcnt); 2545 array_verify (EV_A_ (W *)checks, checkcnt);
2546#endif
1900 2547
1901# if 0 2548# if 0
2549#if EV_CHILD_ENABLE
1902 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1903 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) 2551 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2552#endif
1904# endif 2553# endif
1905#endif 2554#endif
1906} 2555}
1907#endif 2556#endif
1908 2557
1909#if EV_MULTIPLICITY 2558#if EV_MULTIPLICITY
1910struct ev_loop * 2559struct ev_loop * ecb_cold
1911ev_default_loop_init (unsigned int flags)
1912#else 2560#else
1913int 2561int
2562#endif
1914ev_default_loop (unsigned int flags) 2563ev_default_loop (unsigned int flags)
1915#endif
1916{ 2564{
1917 if (!ev_default_loop_ptr) 2565 if (!ev_default_loop_ptr)
1918 { 2566 {
1919#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
1920 EV_P = ev_default_loop_ptr = &default_loop_struct; 2568 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1924 2572
1925 loop_init (EV_A_ flags); 2573 loop_init (EV_A_ flags);
1926 2574
1927 if (ev_backend (EV_A)) 2575 if (ev_backend (EV_A))
1928 { 2576 {
1929#ifndef _WIN32 2577#if EV_CHILD_ENABLE
1930 ev_signal_init (&childev, childcb, SIGCHLD); 2578 ev_signal_init (&childev, childcb, SIGCHLD);
1931 ev_set_priority (&childev, EV_MAXPRI); 2579 ev_set_priority (&childev, EV_MAXPRI);
1932 ev_signal_start (EV_A_ &childev); 2580 ev_signal_start (EV_A_ &childev);
1933 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2581 ev_unref (EV_A); /* child watcher should not keep loop alive */
1934#endif 2582#endif
… …
1939 2587
1940 return ev_default_loop_ptr; 2588 return ev_default_loop_ptr;
1941} 2589}
1942 2590
1943void 2591void
1944ev_default_destroy (void) 2592ev_loop_fork (EV_P)
1945{ 2593{
1946#if EV_MULTIPLICITY
1947 EV_P = ev_default_loop_ptr;
1948#endif
1949
1950 ev_default_loop_ptr = 0;
1951
1952#ifndef _WIN32
1953 ev_ref (EV_A); /* child watcher */
1954 ev_signal_stop (EV_A_ &childev);
1955#endif
1956
1957 loop_destroy (EV_A);
1958}
1959
1960void
1961ev_default_fork (void)
1962{
1963#if EV_MULTIPLICITY
1964 EV_P = ev_default_loop_ptr;
1965#endif
1966
1967 postfork = 1; /* must be in line with ev_loop_fork */ 2594 postfork = 1; /* must be in line with ev_default_fork */
1968} 2595}
1969 2596
1970/*****************************************************************************/ 2597/*****************************************************************************/
1971 2598
1972void 2599void
… …
1994 2621
1995 for (pri = NUMPRI; pri--; ) 2622 for (pri = NUMPRI; pri--; )
1996 while (pendingcnt [pri]) 2623 while (pendingcnt [pri])
1997 { 2624 {
1998 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2625 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1999
2000 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2001 /* ^ this is no longer true, as pending_w could be here */
2002 2626
2003 p->w->pending = 0; 2627 p->w->pending = 0;
2004 EV_CB_INVOKE (p->w, p->events); 2628 EV_CB_INVOKE (p->w, p->events);
2005 EV_FREQUENT_CHECK; 2629 EV_FREQUENT_CHECK;
2006 } 2630 }
… …
2063 EV_FREQUENT_CHECK; 2687 EV_FREQUENT_CHECK;
2064 feed_reverse (EV_A_ (W)w); 2688 feed_reverse (EV_A_ (W)w);
2065 } 2689 }
2066 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2690 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2067 2691
2068 feed_reverse_done (EV_A_ EV_TIMEOUT); 2692 feed_reverse_done (EV_A_ EV_TIMER);
2069 } 2693 }
2070} 2694}
2071 2695
2072#if EV_PERIODIC_ENABLE 2696#if EV_PERIODIC_ENABLE
2697
2698static void noinline
2699periodic_recalc (EV_P_ ev_periodic *w)
2700{
2701 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2702 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2703
2704 /* the above almost always errs on the low side */
2705 while (at <= ev_rt_now)
2706 {
2707 ev_tstamp nat = at + w->interval;
2708
2709 /* when resolution fails us, we use ev_rt_now */
2710 if (expect_false (nat == at))
2711 {
2712 at = ev_rt_now;
2713 break;
2714 }
2715
2716 at = nat;
2717 }
2718
2719 ev_at (w) = at;
2720}
2721
2073/* make periodics pending */ 2722/* make periodics pending */
2074inline_size void 2723inline_size void
2075periodics_reify (EV_P) 2724periodics_reify (EV_P)
2076{ 2725{
2077 EV_FREQUENT_CHECK; 2726 EV_FREQUENT_CHECK;
… …
2096 ANHE_at_cache (periodics [HEAP0]); 2745 ANHE_at_cache (periodics [HEAP0]);
2097 downheap (periodics, periodiccnt, HEAP0); 2746 downheap (periodics, periodiccnt, HEAP0);
2098 } 2747 }
2099 else if (w->interval) 2748 else if (w->interval)
2100 { 2749 {
2101 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2750 periodic_recalc (EV_A_ w);
2102 /* if next trigger time is not sufficiently in the future, put it there */
2103 /* this might happen because of floating point inexactness */
2104 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2105 {
2106 ev_at (w) += w->interval;
2107
2108 /* if interval is unreasonably low we might still have a time in the past */
2109 /* so correct this. this will make the periodic very inexact, but the user */
2110 /* has effectively asked to get triggered more often than possible */
2111 if (ev_at (w) < ev_rt_now)
2112 ev_at (w) = ev_rt_now;
2113 }
2114
2115 ANHE_at_cache (periodics [HEAP0]); 2751 ANHE_at_cache (periodics [HEAP0]);
2116 downheap (periodics, periodiccnt, HEAP0); 2752 downheap (periodics, periodiccnt, HEAP0);
2117 } 2753 }
2118 else 2754 else
2119 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2755 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2126 feed_reverse_done (EV_A_ EV_PERIODIC); 2762 feed_reverse_done (EV_A_ EV_PERIODIC);
2127 } 2763 }
2128} 2764}
2129 2765
2130/* simply recalculate all periodics */ 2766/* simply recalculate all periodics */
2131/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2767/* TODO: maybe ensure that at least one event happens when jumping forward? */
2132static void noinline 2768static void noinline ecb_cold
2133periodics_reschedule (EV_P) 2769periodics_reschedule (EV_P)
2134{ 2770{
2135 int i; 2771 int i;
2136 2772
2137 /* adjust periodics after time jump */ 2773 /* adjust periodics after time jump */
… …
2140 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2776 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2141 2777
2142 if (w->reschedule_cb) 2778 if (w->reschedule_cb)
2143 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2144 else if (w->interval) 2780 else if (w->interval)
2145 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2781 periodic_recalc (EV_A_ w);
2146 2782
2147 ANHE_at_cache (periodics [i]); 2783 ANHE_at_cache (periodics [i]);
2148 } 2784 }
2149 2785
2150 reheap (periodics, periodiccnt); 2786 reheap (periodics, periodiccnt);
2151} 2787}
2152#endif 2788#endif
2153 2789
2154/* adjust all timers by a given offset */ 2790/* adjust all timers by a given offset */
2155static void noinline 2791static void noinline ecb_cold
2156timers_reschedule (EV_P_ ev_tstamp adjust) 2792timers_reschedule (EV_P_ ev_tstamp adjust)
2157{ 2793{
2158 int i; 2794 int i;
2159 2795
2160 for (i = 0; i < timercnt; ++i) 2796 for (i = 0; i < timercnt; ++i)
… …
2197 * doesn't hurt either as we only do this on time-jumps or 2833 * doesn't hurt either as we only do this on time-jumps or
2198 * in the unlikely event of having been preempted here. 2834 * in the unlikely event of having been preempted here.
2199 */ 2835 */
2200 for (i = 4; --i; ) 2836 for (i = 4; --i; )
2201 { 2837 {
2838 ev_tstamp diff;
2202 rtmn_diff = ev_rt_now - mn_now; 2839 rtmn_diff = ev_rt_now - mn_now;
2203 2840
2841 diff = odiff - rtmn_diff;
2842
2204 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2843 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2205 return; /* all is well */ 2844 return; /* all is well */
2206 2845
2207 ev_rt_now = ev_time (); 2846 ev_rt_now = ev_time ();
2208 mn_now = get_clock (); 2847 mn_now = get_clock ();
2209 now_floor = mn_now; 2848 now_floor = mn_now;
… …
2232 mn_now = ev_rt_now; 2871 mn_now = ev_rt_now;
2233 } 2872 }
2234} 2873}
2235 2874
2236void 2875void
2237ev_loop (EV_P_ int flags) 2876ev_run (EV_P_ int flags)
2238{ 2877{
2239#if EV_MINIMAL < 2 2878#if EV_FEATURE_API
2240 ++loop_depth; 2879 ++loop_depth;
2241#endif 2880#endif
2242 2881
2243 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2882 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2244 2883
2245 loop_done = EVUNLOOP_CANCEL; 2884 loop_done = EVBREAK_CANCEL;
2246 2885
2247 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2886 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2248 2887
2249 do 2888 do
2250 { 2889 {
2251#if EV_VERIFY >= 2 2890#if EV_VERIFY >= 2
2252 ev_loop_verify (EV_A); 2891 ev_verify (EV_A);
2253#endif 2892#endif
2254 2893
2255#ifndef _WIN32 2894#ifndef _WIN32
2256 if (expect_false (curpid)) /* penalise the forking check even more */ 2895 if (expect_false (curpid)) /* penalise the forking check even more */
2257 if (expect_false (getpid () != curpid)) 2896 if (expect_false (getpid () != curpid))
… …
2269 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2908 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2270 EV_INVOKE_PENDING; 2909 EV_INVOKE_PENDING;
2271 } 2910 }
2272#endif 2911#endif
2273 2912
2913#if EV_PREPARE_ENABLE
2274 /* queue prepare watchers (and execute them) */ 2914 /* queue prepare watchers (and execute them) */
2275 if (expect_false (preparecnt)) 2915 if (expect_false (preparecnt))
2276 { 2916 {
2277 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2278 EV_INVOKE_PENDING; 2918 EV_INVOKE_PENDING;
2279 } 2919 }
2920#endif
2280 2921
2281 if (expect_false (loop_done)) 2922 if (expect_false (loop_done))
2282 break; 2923 break;
2283 2924
2284 /* we might have forked, so reify kernel state if necessary */ 2925 /* we might have forked, so reify kernel state if necessary */
… …
2291 /* calculate blocking time */ 2932 /* calculate blocking time */
2292 { 2933 {
2293 ev_tstamp waittime = 0.; 2934 ev_tstamp waittime = 0.;
2294 ev_tstamp sleeptime = 0.; 2935 ev_tstamp sleeptime = 0.;
2295 2936
2937 /* remember old timestamp for io_blocktime calculation */
2938 ev_tstamp prev_mn_now = mn_now;
2939
2940 /* update time to cancel out callback processing overhead */
2941 time_update (EV_A_ 1e100);
2942
2943 /* from now on, we want a pipe-wake-up */
2944 pipe_write_wanted = 1;
2945
2946 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2947
2296 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2948 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2297 { 2949 {
2298 /* remember old timestamp for io_blocktime calculation */
2299 ev_tstamp prev_mn_now = mn_now;
2300
2301 /* update time to cancel out callback processing overhead */
2302 time_update (EV_A_ 1e100);
2303
2304 waittime = MAX_BLOCKTIME; 2950 waittime = MAX_BLOCKTIME;
2305 2951
2306 if (timercnt) 2952 if (timercnt)
2307 { 2953 {
2308 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2954 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2309 if (waittime > to) waittime = to; 2955 if (waittime > to) waittime = to;
2310 } 2956 }
2311 2957
2312#if EV_PERIODIC_ENABLE 2958#if EV_PERIODIC_ENABLE
2313 if (periodiccnt) 2959 if (periodiccnt)
2314 { 2960 {
2315 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2961 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2316 if (waittime > to) waittime = to; 2962 if (waittime > to) waittime = to;
2317 } 2963 }
2318#endif 2964#endif
2319 2965
2320 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2966 /* don't let timeouts decrease the waittime below timeout_blocktime */
2321 if (expect_false (waittime < timeout_blocktime)) 2967 if (expect_false (waittime < timeout_blocktime))
2322 waittime = timeout_blocktime; 2968 waittime = timeout_blocktime;
2969
2970 /* at this point, we NEED to wait, so we have to ensure */
2971 /* to pass a minimum nonzero value to the backend */
2972 if (expect_false (waittime < backend_mintime))
2973 waittime = backend_mintime;
2323 2974
2324 /* extra check because io_blocktime is commonly 0 */ 2975 /* extra check because io_blocktime is commonly 0 */
2325 if (expect_false (io_blocktime)) 2976 if (expect_false (io_blocktime))
2326 { 2977 {
2327 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2978 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2328 2979
2329 if (sleeptime > waittime - backend_fudge) 2980 if (sleeptime > waittime - backend_mintime)
2330 sleeptime = waittime - backend_fudge; 2981 sleeptime = waittime - backend_mintime;
2331 2982
2332 if (expect_true (sleeptime > 0.)) 2983 if (expect_true (sleeptime > 0.))
2333 { 2984 {
2334 ev_sleep (sleeptime); 2985 ev_sleep (sleeptime);
2335 waittime -= sleeptime; 2986 waittime -= sleeptime;
2336 } 2987 }
2337 } 2988 }
2338 } 2989 }
2339 2990
2340#if EV_MINIMAL < 2 2991#if EV_FEATURE_API
2341 ++loop_count; 2992 ++loop_count;
2342#endif 2993#endif
2343 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 2994 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2344 backend_poll (EV_A_ waittime); 2995 backend_poll (EV_A_ waittime);
2345 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 2996 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2997
2998 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2999
3000 if (pipe_write_skipped)
3001 {
3002 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3003 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3004 }
3005
2346 3006
2347 /* update ev_rt_now, do magic */ 3007 /* update ev_rt_now, do magic */
2348 time_update (EV_A_ waittime + sleeptime); 3008 time_update (EV_A_ waittime + sleeptime);
2349 } 3009 }
2350 3010
… …
2357#if EV_IDLE_ENABLE 3017#if EV_IDLE_ENABLE
2358 /* queue idle watchers unless other events are pending */ 3018 /* queue idle watchers unless other events are pending */
2359 idle_reify (EV_A); 3019 idle_reify (EV_A);
2360#endif 3020#endif
2361 3021
3022#if EV_CHECK_ENABLE
2362 /* queue check watchers, to be executed first */ 3023 /* queue check watchers, to be executed first */
2363 if (expect_false (checkcnt)) 3024 if (expect_false (checkcnt))
2364 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3025 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3026#endif
2365 3027
2366 EV_INVOKE_PENDING; 3028 EV_INVOKE_PENDING;
2367 } 3029 }
2368 while (expect_true ( 3030 while (expect_true (
2369 activecnt 3031 activecnt
2370 && !loop_done 3032 && !loop_done
2371 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3033 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2372 )); 3034 ));
2373 3035
2374 if (loop_done == EVUNLOOP_ONE) 3036 if (loop_done == EVBREAK_ONE)
2375 loop_done = EVUNLOOP_CANCEL; 3037 loop_done = EVBREAK_CANCEL;
2376 3038
2377#if EV_MINIMAL < 2 3039#if EV_FEATURE_API
2378 --loop_depth; 3040 --loop_depth;
2379#endif 3041#endif
2380} 3042}
2381 3043
2382void 3044void
2383ev_unloop (EV_P_ int how) 3045ev_break (EV_P_ int how)
2384{ 3046{
2385 loop_done = how; 3047 loop_done = how;
2386} 3048}
2387 3049
2388void 3050void
… …
2536 EV_FREQUENT_CHECK; 3198 EV_FREQUENT_CHECK;
2537 3199
2538 wlist_del (&anfds[w->fd].head, (WL)w); 3200 wlist_del (&anfds[w->fd].head, (WL)w);
2539 ev_stop (EV_A_ (W)w); 3201 ev_stop (EV_A_ (W)w);
2540 3202
2541 fd_change (EV_A_ w->fd, 1); 3203 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2542 3204
2543 EV_FREQUENT_CHECK; 3205 EV_FREQUENT_CHECK;
2544} 3206}
2545 3207
2546void noinline 3208void noinline
… …
2638 if (w->reschedule_cb) 3300 if (w->reschedule_cb)
2639 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3301 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2640 else if (w->interval) 3302 else if (w->interval)
2641 { 3303 {
2642 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3304 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2643 /* this formula differs from the one in periodic_reify because we do not always round up */ 3305 periodic_recalc (EV_A_ w);
2644 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2645 } 3306 }
2646 else 3307 else
2647 ev_at (w) = w->offset; 3308 ev_at (w) = w->offset;
2648 3309
2649 EV_FREQUENT_CHECK; 3310 EV_FREQUENT_CHECK;
… …
2698#endif 3359#endif
2699 3360
2700#ifndef SA_RESTART 3361#ifndef SA_RESTART
2701# define SA_RESTART 0 3362# define SA_RESTART 0
2702#endif 3363#endif
3364
3365#if EV_SIGNAL_ENABLE
2703 3366
2704void noinline 3367void noinline
2705ev_signal_start (EV_P_ ev_signal *w) 3368ev_signal_start (EV_P_ ev_signal *w)
2706{ 3369{
2707 if (expect_false (ev_is_active (w))) 3370 if (expect_false (ev_is_active (w)))
… …
2768 sa.sa_handler = ev_sighandler; 3431 sa.sa_handler = ev_sighandler;
2769 sigfillset (&sa.sa_mask); 3432 sigfillset (&sa.sa_mask);
2770 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3433 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2771 sigaction (w->signum, &sa, 0); 3434 sigaction (w->signum, &sa, 0);
2772 3435
3436 if (origflags & EVFLAG_NOSIGMASK)
3437 {
2773 sigemptyset (&sa.sa_mask); 3438 sigemptyset (&sa.sa_mask);
2774 sigaddset (&sa.sa_mask, w->signum); 3439 sigaddset (&sa.sa_mask, w->signum);
2775 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3440 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3441 }
2776#endif 3442#endif
2777 } 3443 }
2778 3444
2779 EV_FREQUENT_CHECK; 3445 EV_FREQUENT_CHECK;
2780} 3446}
… …
2814 } 3480 }
2815 3481
2816 EV_FREQUENT_CHECK; 3482 EV_FREQUENT_CHECK;
2817} 3483}
2818 3484
3485#endif
3486
3487#if EV_CHILD_ENABLE
3488
2819void 3489void
2820ev_child_start (EV_P_ ev_child *w) 3490ev_child_start (EV_P_ ev_child *w)
2821{ 3491{
2822#if EV_MULTIPLICITY 3492#if EV_MULTIPLICITY
2823 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3493 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
… …
2826 return; 3496 return;
2827 3497
2828 EV_FREQUENT_CHECK; 3498 EV_FREQUENT_CHECK;
2829 3499
2830 ev_start (EV_A_ (W)w, 1); 3500 ev_start (EV_A_ (W)w, 1);
2831 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3501 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2832 3502
2833 EV_FREQUENT_CHECK; 3503 EV_FREQUENT_CHECK;
2834} 3504}
2835 3505
2836void 3506void
… …
2840 if (expect_false (!ev_is_active (w))) 3510 if (expect_false (!ev_is_active (w)))
2841 return; 3511 return;
2842 3512
2843 EV_FREQUENT_CHECK; 3513 EV_FREQUENT_CHECK;
2844 3514
2845 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3515 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2846 ev_stop (EV_A_ (W)w); 3516 ev_stop (EV_A_ (W)w);
2847 3517
2848 EV_FREQUENT_CHECK; 3518 EV_FREQUENT_CHECK;
2849} 3519}
3520
3521#endif
2850 3522
2851#if EV_STAT_ENABLE 3523#if EV_STAT_ENABLE
2852 3524
2853# ifdef _WIN32 3525# ifdef _WIN32
2854# undef lstat 3526# undef lstat
… …
2915 if (!pend || pend == path) 3587 if (!pend || pend == path)
2916 break; 3588 break;
2917 3589
2918 *pend = 0; 3590 *pend = 0;
2919 w->wd = inotify_add_watch (fs_fd, path, mask); 3591 w->wd = inotify_add_watch (fs_fd, path, mask);
2920 } 3592 }
2921 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3593 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2922 } 3594 }
2923 } 3595 }
2924 3596
2925 if (w->wd >= 0) 3597 if (w->wd >= 0)
2926 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3598 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2927 3599
2928 /* now re-arm timer, if required */ 3600 /* now re-arm timer, if required */
2929 if (ev_is_active (&w->timer)) ev_ref (EV_A); 3601 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2930 ev_timer_again (EV_A_ &w->timer); 3602 ev_timer_again (EV_A_ &w->timer);
2931 if (ev_is_active (&w->timer)) ev_unref (EV_A); 3603 if (ev_is_active (&w->timer)) ev_unref (EV_A);
… …
2939 3611
2940 if (wd < 0) 3612 if (wd < 0)
2941 return; 3613 return;
2942 3614
2943 w->wd = -2; 3615 w->wd = -2;
2944 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3616 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2945 wlist_del (&fs_hash [slot].head, (WL)w); 3617 wlist_del (&fs_hash [slot].head, (WL)w);
2946 3618
2947 /* remove this watcher, if others are watching it, they will rearm */ 3619 /* remove this watcher, if others are watching it, they will rearm */
2948 inotify_rm_watch (fs_fd, wd); 3620 inotify_rm_watch (fs_fd, wd);
2949} 3621}
… …
2951static void noinline 3623static void noinline
2952infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3624infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2953{ 3625{
2954 if (slot < 0) 3626 if (slot < 0)
2955 /* overflow, need to check for all hash slots */ 3627 /* overflow, need to check for all hash slots */
2956 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3628 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2957 infy_wd (EV_A_ slot, wd, ev); 3629 infy_wd (EV_A_ slot, wd, ev);
2958 else 3630 else
2959 { 3631 {
2960 WL w_; 3632 WL w_;
2961 3633
2962 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3634 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2963 { 3635 {
2964 ev_stat *w = (ev_stat *)w_; 3636 ev_stat *w = (ev_stat *)w_;
2965 w_ = w_->next; /* lets us remove this watcher and all before it */ 3637 w_ = w_->next; /* lets us remove this watcher and all before it */
2966 3638
2967 if (w->wd == wd || wd == -1) 3639 if (w->wd == wd || wd == -1)
2968 { 3640 {
2969 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3641 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2970 { 3642 {
2971 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3643 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2972 w->wd = -1; 3644 w->wd = -1;
2973 infy_add (EV_A_ w); /* re-add, no matter what */ 3645 infy_add (EV_A_ w); /* re-add, no matter what */
2974 } 3646 }
2975 3647
2976 stat_timer_cb (EV_A_ &w->timer, 0); 3648 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2992 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3664 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2993 ofs += sizeof (struct inotify_event) + ev->len; 3665 ofs += sizeof (struct inotify_event) + ev->len;
2994 } 3666 }
2995} 3667}
2996 3668
2997inline_size void 3669inline_size void ecb_cold
2998check_2625 (EV_P) 3670ev_check_2625 (EV_P)
2999{ 3671{
3000 /* kernels < 2.6.25 are borked 3672 /* kernels < 2.6.25 are borked
3001 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3673 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3002 */ 3674 */
3003 struct utsname buf; 3675 if (ev_linux_version () < 0x020619)
3004 int major, minor, micro;
3005
3006 if (uname (&buf))
3007 return;
3008
3009 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
3010 return;
3011
3012 if (major < 2
3013 || (major == 2 && minor < 6)
3014 || (major == 2 && minor == 6 && micro < 25))
3015 return; 3676 return;
3016 3677
3017 fs_2625 = 1; 3678 fs_2625 = 1;
3018} 3679}
3019 3680
… …
3034 if (fs_fd != -2) 3695 if (fs_fd != -2)
3035 return; 3696 return;
3036 3697
3037 fs_fd = -1; 3698 fs_fd = -1;
3038 3699
3039 check_2625 (EV_A); 3700 ev_check_2625 (EV_A);
3040 3701
3041 fs_fd = infy_newfd (); 3702 fs_fd = infy_newfd ();
3042 3703
3043 if (fs_fd >= 0) 3704 if (fs_fd >= 0)
3044 { 3705 {
… …
3069 ev_io_set (&fs_w, fs_fd, EV_READ); 3730 ev_io_set (&fs_w, fs_fd, EV_READ);
3070 ev_io_start (EV_A_ &fs_w); 3731 ev_io_start (EV_A_ &fs_w);
3071 ev_unref (EV_A); 3732 ev_unref (EV_A);
3072 } 3733 }
3073 3734
3074 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3735 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3075 { 3736 {
3076 WL w_ = fs_hash [slot].head; 3737 WL w_ = fs_hash [slot].head;
3077 fs_hash [slot].head = 0; 3738 fs_hash [slot].head = 0;
3078 3739
3079 while (w_) 3740 while (w_)
… …
3254 3915
3255 EV_FREQUENT_CHECK; 3916 EV_FREQUENT_CHECK;
3256} 3917}
3257#endif 3918#endif
3258 3919
3920#if EV_PREPARE_ENABLE
3259void 3921void
3260ev_prepare_start (EV_P_ ev_prepare *w) 3922ev_prepare_start (EV_P_ ev_prepare *w)
3261{ 3923{
3262 if (expect_false (ev_is_active (w))) 3924 if (expect_false (ev_is_active (w)))
3263 return; 3925 return;
… …
3289 3951
3290 ev_stop (EV_A_ (W)w); 3952 ev_stop (EV_A_ (W)w);
3291 3953
3292 EV_FREQUENT_CHECK; 3954 EV_FREQUENT_CHECK;
3293} 3955}
3956#endif
3294 3957
3958#if EV_CHECK_ENABLE
3295void 3959void
3296ev_check_start (EV_P_ ev_check *w) 3960ev_check_start (EV_P_ ev_check *w)
3297{ 3961{
3298 if (expect_false (ev_is_active (w))) 3962 if (expect_false (ev_is_active (w)))
3299 return; 3963 return;
… …
3325 3989
3326 ev_stop (EV_A_ (W)w); 3990 ev_stop (EV_A_ (W)w);
3327 3991
3328 EV_FREQUENT_CHECK; 3992 EV_FREQUENT_CHECK;
3329} 3993}
3994#endif
3330 3995
3331#if EV_EMBED_ENABLE 3996#if EV_EMBED_ENABLE
3332void noinline 3997void noinline
3333ev_embed_sweep (EV_P_ ev_embed *w) 3998ev_embed_sweep (EV_P_ ev_embed *w)
3334{ 3999{
3335 ev_loop (w->other, EVLOOP_NONBLOCK); 4000 ev_run (w->other, EVRUN_NOWAIT);
3336} 4001}
3337 4002
3338static void 4003static void
3339embed_io_cb (EV_P_ ev_io *io, int revents) 4004embed_io_cb (EV_P_ ev_io *io, int revents)
3340{ 4005{
3341 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4006 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3342 4007
3343 if (ev_cb (w)) 4008 if (ev_cb (w))
3344 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4009 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3345 else 4010 else
3346 ev_loop (w->other, EVLOOP_NONBLOCK); 4011 ev_run (w->other, EVRUN_NOWAIT);
3347} 4012}
3348 4013
3349static void 4014static void
3350embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4015embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3351{ 4016{
… …
3355 EV_P = w->other; 4020 EV_P = w->other;
3356 4021
3357 while (fdchangecnt) 4022 while (fdchangecnt)
3358 { 4023 {
3359 fd_reify (EV_A); 4024 fd_reify (EV_A);
3360 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4025 ev_run (EV_A_ EVRUN_NOWAIT);
3361 } 4026 }
3362 } 4027 }
3363} 4028}
3364 4029
3365static void 4030static void
… …
3371 4036
3372 { 4037 {
3373 EV_P = w->other; 4038 EV_P = w->other;
3374 4039
3375 ev_loop_fork (EV_A); 4040 ev_loop_fork (EV_A);
3376 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4041 ev_run (EV_A_ EVRUN_NOWAIT);
3377 } 4042 }
3378 4043
3379 ev_embed_start (EV_A_ w); 4044 ev_embed_start (EV_A_ w);
3380} 4045}
3381 4046
… …
3473 4138
3474 EV_FREQUENT_CHECK; 4139 EV_FREQUENT_CHECK;
3475} 4140}
3476#endif 4141#endif
3477 4142
4143#if EV_CLEANUP_ENABLE
4144void
4145ev_cleanup_start (EV_P_ ev_cleanup *w)
4146{
4147 if (expect_false (ev_is_active (w)))
4148 return;
4149
4150 EV_FREQUENT_CHECK;
4151
4152 ev_start (EV_A_ (W)w, ++cleanupcnt);
4153 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4154 cleanups [cleanupcnt - 1] = w;
4155
4156 /* cleanup watchers should never keep a refcount on the loop */
4157 ev_unref (EV_A);
4158 EV_FREQUENT_CHECK;
4159}
4160
4161void
4162ev_cleanup_stop (EV_P_ ev_cleanup *w)
4163{
4164 clear_pending (EV_A_ (W)w);
4165 if (expect_false (!ev_is_active (w)))
4166 return;
4167
4168 EV_FREQUENT_CHECK;
4169 ev_ref (EV_A);
4170
4171 {
4172 int active = ev_active (w);
4173
4174 cleanups [active - 1] = cleanups [--cleanupcnt];
4175 ev_active (cleanups [active - 1]) = active;
4176 }
4177
4178 ev_stop (EV_A_ (W)w);
4179
4180 EV_FREQUENT_CHECK;
4181}
4182#endif
4183
3478#if EV_ASYNC_ENABLE 4184#if EV_ASYNC_ENABLE
3479void 4185void
3480ev_async_start (EV_P_ ev_async *w) 4186ev_async_start (EV_P_ ev_async *w)
3481{ 4187{
3482 if (expect_false (ev_is_active (w))) 4188 if (expect_false (ev_is_active (w)))
3483 return; 4189 return;
4190
4191 w->sent = 0;
3484 4192
3485 evpipe_init (EV_A); 4193 evpipe_init (EV_A);
3486 4194
3487 EV_FREQUENT_CHECK; 4195 EV_FREQUENT_CHECK;
3488 4196
… …
3566{ 4274{
3567 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4275 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3568 4276
3569 if (expect_false (!once)) 4277 if (expect_false (!once))
3570 { 4278 {
3571 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4279 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3572 return; 4280 return;
3573 } 4281 }
3574 4282
3575 once->cb = cb; 4283 once->cb = cb;
3576 once->arg = arg; 4284 once->arg = arg;
… …
3591} 4299}
3592 4300
3593/*****************************************************************************/ 4301/*****************************************************************************/
3594 4302
3595#if EV_WALK_ENABLE 4303#if EV_WALK_ENABLE
3596void 4304void ecb_cold
3597ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4305ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3598{ 4306{
3599 int i, j; 4307 int i, j;
3600 ev_watcher_list *wl, *wn; 4308 ev_watcher_list *wl, *wn;
3601 4309
… …
3645 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4353 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3646#endif 4354#endif
3647 4355
3648#if EV_IDLE_ENABLE 4356#if EV_IDLE_ENABLE
3649 if (types & EV_IDLE) 4357 if (types & EV_IDLE)
3650 for (j = NUMPRI; i--; ) 4358 for (j = NUMPRI; j--; )
3651 for (i = idlecnt [j]; i--; ) 4359 for (i = idlecnt [j]; i--; )
3652 cb (EV_A_ EV_IDLE, idles [j][i]); 4360 cb (EV_A_ EV_IDLE, idles [j][i]);
3653#endif 4361#endif
3654 4362
3655#if EV_FORK_ENABLE 4363#if EV_FORK_ENABLE
… …
3663 if (types & EV_ASYNC) 4371 if (types & EV_ASYNC)
3664 for (i = asynccnt; i--; ) 4372 for (i = asynccnt; i--; )
3665 cb (EV_A_ EV_ASYNC, asyncs [i]); 4373 cb (EV_A_ EV_ASYNC, asyncs [i]);
3666#endif 4374#endif
3667 4375
4376#if EV_PREPARE_ENABLE
3668 if (types & EV_PREPARE) 4377 if (types & EV_PREPARE)
3669 for (i = preparecnt; i--; ) 4378 for (i = preparecnt; i--; )
3670#if EV_EMBED_ENABLE 4379# if EV_EMBED_ENABLE
3671 if (ev_cb (prepares [i]) != embed_prepare_cb) 4380 if (ev_cb (prepares [i]) != embed_prepare_cb)
3672#endif 4381# endif
3673 cb (EV_A_ EV_PREPARE, prepares [i]); 4382 cb (EV_A_ EV_PREPARE, prepares [i]);
4383#endif
3674 4384
4385#if EV_CHECK_ENABLE
3675 if (types & EV_CHECK) 4386 if (types & EV_CHECK)
3676 for (i = checkcnt; i--; ) 4387 for (i = checkcnt; i--; )
3677 cb (EV_A_ EV_CHECK, checks [i]); 4388 cb (EV_A_ EV_CHECK, checks [i]);
4389#endif
3678 4390
4391#if EV_SIGNAL_ENABLE
3679 if (types & EV_SIGNAL) 4392 if (types & EV_SIGNAL)
3680 for (i = 0; i < EV_NSIG - 1; ++i) 4393 for (i = 0; i < EV_NSIG - 1; ++i)
3681 for (wl = signals [i].head; wl; ) 4394 for (wl = signals [i].head; wl; )
3682 { 4395 {
3683 wn = wl->next; 4396 wn = wl->next;
3684 cb (EV_A_ EV_SIGNAL, wl); 4397 cb (EV_A_ EV_SIGNAL, wl);
3685 wl = wn; 4398 wl = wn;
3686 } 4399 }
4400#endif
3687 4401
4402#if EV_CHILD_ENABLE
3688 if (types & EV_CHILD) 4403 if (types & EV_CHILD)
3689 for (i = EV_PID_HASHSIZE; i--; ) 4404 for (i = (EV_PID_HASHSIZE); i--; )
3690 for (wl = childs [i]; wl; ) 4405 for (wl = childs [i]; wl; )
3691 { 4406 {
3692 wn = wl->next; 4407 wn = wl->next;
3693 cb (EV_A_ EV_CHILD, wl); 4408 cb (EV_A_ EV_CHILD, wl);
3694 wl = wn; 4409 wl = wn;
3695 } 4410 }
4411#endif
3696/* EV_STAT 0x00001000 /* stat data changed */ 4412/* EV_STAT 0x00001000 /* stat data changed */
3697/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4413/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3698} 4414}
3699#endif 4415#endif
3700 4416
3701#if EV_MULTIPLICITY 4417#if EV_MULTIPLICITY
3702 #include "ev_wrap.h" 4418 #include "ev_wrap.h"
3703#endif 4419#endif
3704 4420
3705#ifdef __cplusplus 4421EV_CPP(})
3706}
3707#endif
3708 4422

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