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Comparing libev/ev.c (file contents):
Revision 1.228 by root, Fri May 2 08:07:37 2008 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 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
51 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# 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
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
130# endif 154# endif
131 155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
132#endif 163# endif
164
165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# include "ev.h" 185# include "ev.h"
152#endif 186#endif
187
188EV_CPP(extern "C" {)
153 189
154#ifndef _WIN32 190#ifndef _WIN32
155# include <sys/time.h> 191# include <sys/time.h>
156# include <sys/wait.h> 192# include <sys/wait.h>
157# include <unistd.h> 193# include <unistd.h>
158#else 194#else
195# include <io.h>
159# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
160# include <windows.h> 197# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
163# endif 200# endif
201# undef EV_AVOID_STDIO
164#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
165 211
166/* 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 */
167 213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
251# endif
252#endif
253
168#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
169# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
170#endif 260#endif
171 261
172#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 264#endif
175 265
176#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
177# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
271# endif
178#endif 272#endif
179 273
180#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 276#endif
183 277
184#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
185# ifdef _WIN32 279# ifdef _WIN32
186# define EV_USE_POLL 0 280# define EV_USE_POLL 0
187# else 281# else
188# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 283# endif
190#endif 284#endif
191 285
192#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 289# else
196# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
197# endif 291# endif
198#endif 292#endif
199 293
… …
205# define EV_USE_PORT 0 299# define EV_USE_PORT 0
206#endif 300#endif
207 301
208#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 305# else
212# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
213# endif 307# endif
214#endif 308#endif
215 309
216#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 312#endif
223 313
224#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 316#endif
231 317
232#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 321# else
236# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
237# endif 323# endif
238#endif 324#endif
239 325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
241 373
242#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
245#endif 377#endif
… …
253# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
255#endif 387#endif
256 388
257#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
259# include <sys/select.h> 392# include <sys/select.h>
260# endif 393# endif
261#endif 394#endif
262 395
263#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
264# include <sys/inotify.h> 398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
265#endif 404#endif
266 405
267#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h> 407# include <winsock.h>
269#endif 408#endif
270 409
271#if EV_USE_EVENTFD 410#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h> 412# include <stdint.h>
274# ifdef __cplusplus 413# ifndef EFD_NONBLOCK
275extern "C" { 414# define EFD_NONBLOCK O_NONBLOCK
276# endif 415# endif
277int eventfd (unsigned int initval, int flags); 416# ifndef EFD_CLOEXEC
278# ifdef __cplusplus 417# ifdef O_CLOEXEC
279} 418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
280# endif 422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
281#endif 446#endif
282 447
283/**/ 448/**/
284 449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
285/* 456/*
286 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */ 459 */
293#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 */
294 462
295#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) */
296#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) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298 465
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;
299#if __GNUC__ >= 4 510 #if __GNUC__
300# define expect(expr,value) __builtin_expect ((expr),(value)) 511 typedef signed long long int64_t;
301# 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
302#else 517#else
303# define expect(expr,value) (expr) 518 #include <inttypes.h>
304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# 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)))
308#endif 533 #endif
534#endif
309 535
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. */
310#define expect_false(expr) expect ((expr) != 0, 0) 678#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
311#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
312#define inline_size static inline 900#define inline_size ecb_inline
313 901
314#if EV_MINIMAL 902#if EV_FEATURE_CODE
903# define inline_speed ecb_inline
904#else
315# define inline_speed static noinline 905# define inline_speed static noinline
906#endif
907
908#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
909
910#if EV_MINPRI == EV_MAXPRI
911# define ABSPRI(w) (((W)w), 0)
316#else 912#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 913# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
914#endif
322 915
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 916#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */ 917#define EMPTY2(a,b) /* used to suppress some warnings */
325 918
326typedef ev_watcher *W; 919typedef ev_watcher *W;
327typedef ev_watcher_list *WL; 920typedef ev_watcher_list *WL;
328typedef ev_watcher_time *WT; 921typedef ev_watcher_time *WT;
329 922
923#define ev_active(w) ((W)(w))->active
330#define ev_at(w) ((WT)(w))->at 924#define ev_at(w) ((WT)(w))->at
331 925
926#if EV_USE_REALTIME
927/* sig_atomic_t is used to avoid per-thread variables or locking but still */
928/* giving it a reasonably high chance of working on typical architectures */
929static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
930#endif
931
332#if EV_USE_MONOTONIC 932#if EV_USE_MONOTONIC
333/* sig_atomic_t is used to avoid per-thread variables or locking but still */
334/* giving it a reasonably high chance of working on typical architetcures */
335static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 933static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
934#endif
935
936#ifndef EV_FD_TO_WIN32_HANDLE
937# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
938#endif
939#ifndef EV_WIN32_HANDLE_TO_FD
940# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
941#endif
942#ifndef EV_WIN32_CLOSE_FD
943# define EV_WIN32_CLOSE_FD(fd) close (fd)
336#endif 944#endif
337 945
338#ifdef _WIN32 946#ifdef _WIN32
339# include "ev_win32.c" 947# include "ev_win32.c"
340#endif 948#endif
341 949
342/*****************************************************************************/ 950/*****************************************************************************/
343 951
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
344static void (*syserr_cb)(const char *msg); 1050static void (*syserr_cb)(const char *msg);
345 1051
346void 1052void ecb_cold
347ev_set_syserr_cb (void (*cb)(const char *msg)) 1053ev_set_syserr_cb (void (*cb)(const char *msg))
348{ 1054{
349 syserr_cb = cb; 1055 syserr_cb = cb;
350} 1056}
351 1057
352static void noinline 1058static void noinline ecb_cold
353syserr (const char *msg) 1059ev_syserr (const char *msg)
354{ 1060{
355 if (!msg) 1061 if (!msg)
356 msg = "(libev) system error"; 1062 msg = "(libev) system error";
357 1063
358 if (syserr_cb) 1064 if (syserr_cb)
359 syserr_cb (msg); 1065 syserr_cb (msg);
360 else 1066 else
361 { 1067 {
1068#if EV_AVOID_STDIO
1069 ev_printerr (msg);
1070 ev_printerr (": ");
1071 ev_printerr (strerror (errno));
1072 ev_printerr ("\n");
1073#else
362 perror (msg); 1074 perror (msg);
1075#endif
363 abort (); 1076 abort ();
364 } 1077 }
365} 1078}
366 1079
367static void * 1080static void *
368ev_realloc_emul (void *ptr, long size) 1081ev_realloc_emul (void *ptr, long size)
369{ 1082{
1083#if __GLIBC__
1084 return realloc (ptr, size);
1085#else
370 /* some systems, notably openbsd and darwin, fail to properly 1086 /* some systems, notably openbsd and darwin, fail to properly
371 * 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
372 * the single unix specification, so work around them here. 1088 * the single unix specification, so work around them here.
373 */ 1089 */
374 1090
375 if (size) 1091 if (size)
376 return realloc (ptr, size); 1092 return realloc (ptr, size);
377 1093
378 free (ptr); 1094 free (ptr);
379 return 0; 1095 return 0;
1096#endif
380} 1097}
381 1098
382static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1099static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
383 1100
384void 1101void ecb_cold
385ev_set_allocator (void *(*cb)(void *ptr, long size)) 1102ev_set_allocator (void *(*cb)(void *ptr, long size))
386{ 1103{
387 alloc = cb; 1104 alloc = cb;
388} 1105}
389 1106
… …
392{ 1109{
393 ptr = alloc (ptr, size); 1110 ptr = alloc (ptr, size);
394 1111
395 if (!ptr && size) 1112 if (!ptr && size)
396 { 1113 {
1114#if EV_AVOID_STDIO
1115 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1116#else
397 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1117 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1118#endif
398 abort (); 1119 abort ();
399 } 1120 }
400 1121
401 return ptr; 1122 return ptr;
402} 1123}
… …
404#define ev_malloc(size) ev_realloc (0, (size)) 1125#define ev_malloc(size) ev_realloc (0, (size))
405#define ev_free(ptr) ev_realloc ((ptr), 0) 1126#define ev_free(ptr) ev_realloc ((ptr), 0)
406 1127
407/*****************************************************************************/ 1128/*****************************************************************************/
408 1129
1130/* set in reify when reification needed */
1131#define EV_ANFD_REIFY 1
1132
1133/* file descriptor info structure */
409typedef struct 1134typedef struct
410{ 1135{
411 WL head; 1136 WL head;
412 unsigned char events; 1137 unsigned char events; /* the events watched for */
1138 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1139 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
413 unsigned char reify; 1140 unsigned char unused;
1141#if EV_USE_EPOLL
1142 unsigned int egen; /* generation counter to counter epoll bugs */
1143#endif
414#if EV_SELECT_IS_WINSOCKET 1144#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
415 SOCKET handle; 1145 SOCKET handle;
416#endif 1146#endif
1147#if EV_USE_IOCP
1148 OVERLAPPED or, ow;
1149#endif
417} ANFD; 1150} ANFD;
418 1151
1152/* stores the pending event set for a given watcher */
419typedef struct 1153typedef struct
420{ 1154{
421 W w; 1155 W w;
422 int events; 1156 int events; /* the pending event set for the given watcher */
423} ANPENDING; 1157} ANPENDING;
424 1158
425#if EV_USE_INOTIFY 1159#if EV_USE_INOTIFY
1160/* hash table entry per inotify-id */
426typedef struct 1161typedef struct
427{ 1162{
428 WL head; 1163 WL head;
429} ANFS; 1164} ANFS;
1165#endif
1166
1167/* Heap Entry */
1168#if EV_HEAP_CACHE_AT
1169 /* a heap element */
1170 typedef struct {
1171 ev_tstamp at;
1172 WT w;
1173 } ANHE;
1174
1175 #define ANHE_w(he) (he).w /* access watcher, read-write */
1176 #define ANHE_at(he) (he).at /* access cached at, read-only */
1177 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1178#else
1179 /* a heap element */
1180 typedef WT ANHE;
1181
1182 #define ANHE_w(he) (he)
1183 #define ANHE_at(he) (he)->at
1184 #define ANHE_at_cache(he)
430#endif 1185#endif
431 1186
432#if EV_MULTIPLICITY 1187#if EV_MULTIPLICITY
433 1188
434 struct ev_loop 1189 struct ev_loop
… …
453 1208
454 static int ev_default_loop_ptr; 1209 static int ev_default_loop_ptr;
455 1210
456#endif 1211#endif
457 1212
1213#if EV_FEATURE_API
1214# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1215# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1216# define EV_INVOKE_PENDING invoke_cb (EV_A)
1217#else
1218# define EV_RELEASE_CB (void)0
1219# define EV_ACQUIRE_CB (void)0
1220# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1221#endif
1222
1223#define EVBREAK_RECURSE 0x80
1224
458/*****************************************************************************/ 1225/*****************************************************************************/
459 1226
1227#ifndef EV_HAVE_EV_TIME
460ev_tstamp 1228ev_tstamp
461ev_time (void) 1229ev_time (void)
462{ 1230{
463#if EV_USE_REALTIME 1231#if EV_USE_REALTIME
1232 if (expect_true (have_realtime))
1233 {
464 struct timespec ts; 1234 struct timespec ts;
465 clock_gettime (CLOCK_REALTIME, &ts); 1235 clock_gettime (CLOCK_REALTIME, &ts);
466 return ts.tv_sec + ts.tv_nsec * 1e-9; 1236 return ts.tv_sec + ts.tv_nsec * 1e-9;
467#else 1237 }
1238#endif
1239
468 struct timeval tv; 1240 struct timeval tv;
469 gettimeofday (&tv, 0); 1241 gettimeofday (&tv, 0);
470 return tv.tv_sec + tv.tv_usec * 1e-6; 1242 return tv.tv_sec + tv.tv_usec * 1e-6;
471#endif
472} 1243}
1244#endif
473 1245
474ev_tstamp inline_size 1246inline_size ev_tstamp
475get_clock (void) 1247get_clock (void)
476{ 1248{
477#if EV_USE_MONOTONIC 1249#if EV_USE_MONOTONIC
478 if (expect_true (have_monotonic)) 1250 if (expect_true (have_monotonic))
479 { 1251 {
… …
500 if (delay > 0.) 1272 if (delay > 0.)
501 { 1273 {
502#if EV_USE_NANOSLEEP 1274#if EV_USE_NANOSLEEP
503 struct timespec ts; 1275 struct timespec ts;
504 1276
505 ts.tv_sec = (time_t)delay; 1277 EV_TS_SET (ts, delay);
506 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
507
508 nanosleep (&ts, 0); 1278 nanosleep (&ts, 0);
509#elif defined(_WIN32) 1279#elif defined(_WIN32)
510 Sleep ((unsigned long)(delay * 1e3)); 1280 Sleep ((unsigned long)(delay * 1e3));
511#else 1281#else
512 struct timeval tv; 1282 struct timeval tv;
513 1283
514 tv.tv_sec = (time_t)delay; 1284 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
515 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1285 /* something not guaranteed by newer posix versions, but guaranteed */
516 1286 /* by older ones */
1287 EV_TV_SET (tv, delay);
517 select (0, 0, 0, 0, &tv); 1288 select (0, 0, 0, 0, &tv);
518#endif 1289#endif
519 } 1290 }
520} 1291}
521 1292
522/*****************************************************************************/ 1293/*****************************************************************************/
523 1294
524int inline_size 1295#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1296
1297/* find a suitable new size for the given array, */
1298/* hopefully by rounding to a nice-to-malloc size */
1299inline_size int
525array_nextsize (int elem, int cur, int cnt) 1300array_nextsize (int elem, int cur, int cnt)
526{ 1301{
527 int ncur = cur + 1; 1302 int ncur = cur + 1;
528 1303
529 do 1304 do
530 ncur <<= 1; 1305 ncur <<= 1;
531 while (cnt > ncur); 1306 while (cnt > ncur);
532 1307
533 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1308 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
534 if (elem * ncur > 4096) 1309 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
535 { 1310 {
536 ncur *= elem; 1311 ncur *= elem;
537 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1312 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
538 ncur = ncur - sizeof (void *) * 4; 1313 ncur = ncur - sizeof (void *) * 4;
539 ncur /= elem; 1314 ncur /= elem;
540 } 1315 }
541 1316
542 return ncur; 1317 return ncur;
543} 1318}
544 1319
545static noinline void * 1320static void * noinline ecb_cold
546array_realloc (int elem, void *base, int *cur, int cnt) 1321array_realloc (int elem, void *base, int *cur, int cnt)
547{ 1322{
548 *cur = array_nextsize (elem, *cur, cnt); 1323 *cur = array_nextsize (elem, *cur, cnt);
549 return ev_realloc (base, elem * *cur); 1324 return ev_realloc (base, elem * *cur);
550} 1325}
1326
1327#define array_init_zero(base,count) \
1328 memset ((void *)(base), 0, sizeof (*(base)) * (count))
551 1329
552#define array_needsize(type,base,cur,cnt,init) \ 1330#define array_needsize(type,base,cur,cnt,init) \
553 if (expect_false ((cnt) > (cur))) \ 1331 if (expect_false ((cnt) > (cur))) \
554 { \ 1332 { \
555 int ocur_ = (cur); \ 1333 int ecb_unused ocur_ = (cur); \
556 (base) = (type *)array_realloc \ 1334 (base) = (type *)array_realloc \
557 (sizeof (type), (base), &(cur), (cnt)); \ 1335 (sizeof (type), (base), &(cur), (cnt)); \
558 init ((base) + (ocur_), (cur) - ocur_); \ 1336 init ((base) + (ocur_), (cur) - ocur_); \
559 } 1337 }
560 1338
… …
567 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1345 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
568 } 1346 }
569#endif 1347#endif
570 1348
571#define array_free(stem, idx) \ 1349#define array_free(stem, idx) \
572 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1350 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
573 1351
574/*****************************************************************************/ 1352/*****************************************************************************/
1353
1354/* dummy callback for pending events */
1355static void noinline
1356pendingcb (EV_P_ ev_prepare *w, int revents)
1357{
1358}
575 1359
576void noinline 1360void noinline
577ev_feed_event (EV_P_ void *w, int revents) 1361ev_feed_event (EV_P_ void *w, int revents)
578{ 1362{
579 W w_ = (W)w; 1363 W w_ = (W)w;
… …
588 pendings [pri][w_->pending - 1].w = w_; 1372 pendings [pri][w_->pending - 1].w = w_;
589 pendings [pri][w_->pending - 1].events = revents; 1373 pendings [pri][w_->pending - 1].events = revents;
590 } 1374 }
591} 1375}
592 1376
593void inline_speed 1377inline_speed void
1378feed_reverse (EV_P_ W w)
1379{
1380 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1381 rfeeds [rfeedcnt++] = w;
1382}
1383
1384inline_size void
1385feed_reverse_done (EV_P_ int revents)
1386{
1387 do
1388 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1389 while (rfeedcnt);
1390}
1391
1392inline_speed void
594queue_events (EV_P_ W *events, int eventcnt, int type) 1393queue_events (EV_P_ W *events, int eventcnt, int type)
595{ 1394{
596 int i; 1395 int i;
597 1396
598 for (i = 0; i < eventcnt; ++i) 1397 for (i = 0; i < eventcnt; ++i)
599 ev_feed_event (EV_A_ events [i], type); 1398 ev_feed_event (EV_A_ events [i], type);
600} 1399}
601 1400
602/*****************************************************************************/ 1401/*****************************************************************************/
603 1402
604void inline_size 1403inline_speed void
605anfds_init (ANFD *base, int count)
606{
607 while (count--)
608 {
609 base->head = 0;
610 base->events = EV_NONE;
611 base->reify = 0;
612
613 ++base;
614 }
615}
616
617void inline_speed
618fd_event (EV_P_ int fd, int revents) 1404fd_event_nocheck (EV_P_ int fd, int revents)
619{ 1405{
620 ANFD *anfd = anfds + fd; 1406 ANFD *anfd = anfds + fd;
621 ev_io *w; 1407 ev_io *w;
622 1408
623 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)
… …
627 if (ev) 1413 if (ev)
628 ev_feed_event (EV_A_ (W)w, ev); 1414 ev_feed_event (EV_A_ (W)w, ev);
629 } 1415 }
630} 1416}
631 1417
1418/* do not submit kernel events for fds that have reify set */
1419/* because that means they changed while we were polling for new events */
1420inline_speed void
1421fd_event (EV_P_ int fd, int revents)
1422{
1423 ANFD *anfd = anfds + fd;
1424
1425 if (expect_true (!anfd->reify))
1426 fd_event_nocheck (EV_A_ fd, revents);
1427}
1428
632void 1429void
633ev_feed_fd_event (EV_P_ int fd, int revents) 1430ev_feed_fd_event (EV_P_ int fd, int revents)
634{ 1431{
635 if (fd >= 0 && fd < anfdmax) 1432 if (fd >= 0 && fd < anfdmax)
636 fd_event (EV_A_ fd, revents); 1433 fd_event_nocheck (EV_A_ fd, revents);
637} 1434}
638 1435
639void inline_size 1436/* make sure the external fd watch events are in-sync */
1437/* with the kernel/libev internal state */
1438inline_size void
640fd_reify (EV_P) 1439fd_reify (EV_P)
641{ 1440{
642 int i; 1441 int i;
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
643 1467
644 for (i = 0; i < fdchangecnt; ++i) 1468 for (i = 0; i < fdchangecnt; ++i)
645 { 1469 {
646 int fd = fdchanges [i]; 1470 int fd = fdchanges [i];
647 ANFD *anfd = anfds + fd; 1471 ANFD *anfd = anfds + fd;
648 ev_io *w; 1472 ev_io *w;
649 1473
650 unsigned char events = 0; 1474 unsigned char o_events = anfd->events;
1475 unsigned char o_reify = anfd->reify;
651 1476
652 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1477 anfd->reify = 0;
653 events |= (unsigned char)w->events;
654 1478
655#if EV_SELECT_IS_WINSOCKET 1479 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
656 if (events)
657 { 1480 {
658 unsigned long argp; 1481 anfd->events = 0;
659 #ifdef EV_FD_TO_WIN32_HANDLE 1482
660 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1483 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
661 #else 1484 anfd->events |= (unsigned char)w->events;
662 anfd->handle = _get_osfhandle (fd); 1485
663 #endif 1486 if (o_events != anfd->events)
664 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1487 o_reify = EV__IOFDSET; /* actually |= */
665 } 1488 }
666#endif
667 1489
668 { 1490 if (o_reify & EV__IOFDSET)
669 unsigned char o_events = anfd->events;
670 unsigned char o_reify = anfd->reify;
671
672 anfd->reify = 0;
673 anfd->events = events;
674
675 if (o_events != events || o_reify & EV_IOFDSET)
676 backend_modify (EV_A_ fd, o_events, events); 1491 backend_modify (EV_A_ fd, o_events, anfd->events);
677 }
678 } 1492 }
679 1493
680 fdchangecnt = 0; 1494 fdchangecnt = 0;
681} 1495}
682 1496
683void inline_size 1497/* something about the given fd changed */
1498inline_size void
684fd_change (EV_P_ int fd, int flags) 1499fd_change (EV_P_ int fd, int flags)
685{ 1500{
686 unsigned char reify = anfds [fd].reify; 1501 unsigned char reify = anfds [fd].reify;
687 anfds [fd].reify |= flags; 1502 anfds [fd].reify |= flags;
688 1503
… …
692 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1507 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
693 fdchanges [fdchangecnt - 1] = fd; 1508 fdchanges [fdchangecnt - 1] = fd;
694 } 1509 }
695} 1510}
696 1511
697void inline_speed 1512/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1513inline_speed void ecb_cold
698fd_kill (EV_P_ int fd) 1514fd_kill (EV_P_ int fd)
699{ 1515{
700 ev_io *w; 1516 ev_io *w;
701 1517
702 while ((w = (ev_io *)anfds [fd].head)) 1518 while ((w = (ev_io *)anfds [fd].head))
… …
704 ev_io_stop (EV_A_ w); 1520 ev_io_stop (EV_A_ w);
705 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);
706 } 1522 }
707} 1523}
708 1524
709int inline_size 1525/* check whether the given fd is actually valid, for error recovery */
1526inline_size int ecb_cold
710fd_valid (int fd) 1527fd_valid (int fd)
711{ 1528{
712#ifdef _WIN32 1529#ifdef _WIN32
713 return _get_osfhandle (fd) != -1; 1530 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
714#else 1531#else
715 return fcntl (fd, F_GETFD) != -1; 1532 return fcntl (fd, F_GETFD) != -1;
716#endif 1533#endif
717} 1534}
718 1535
719/* called on EBADF to verify fds */ 1536/* called on EBADF to verify fds */
720static void noinline 1537static void noinline ecb_cold
721fd_ebadf (EV_P) 1538fd_ebadf (EV_P)
722{ 1539{
723 int fd; 1540 int fd;
724 1541
725 for (fd = 0; fd < anfdmax; ++fd) 1542 for (fd = 0; fd < anfdmax; ++fd)
726 if (anfds [fd].events) 1543 if (anfds [fd].events)
727 if (!fd_valid (fd) == -1 && errno == EBADF) 1544 if (!fd_valid (fd) && errno == EBADF)
728 fd_kill (EV_A_ fd); 1545 fd_kill (EV_A_ fd);
729} 1546}
730 1547
731/* 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 */
732static void noinline 1549static void noinline ecb_cold
733fd_enomem (EV_P) 1550fd_enomem (EV_P)
734{ 1551{
735 int fd; 1552 int fd;
736 1553
737 for (fd = anfdmax; fd--; ) 1554 for (fd = anfdmax; fd--; )
738 if (anfds [fd].events) 1555 if (anfds [fd].events)
739 { 1556 {
740 fd_kill (EV_A_ fd); 1557 fd_kill (EV_A_ fd);
741 return; 1558 break;
742 } 1559 }
743} 1560}
744 1561
745/* usually called after fork if backend needs to re-arm all fds from scratch */ 1562/* usually called after fork if backend needs to re-arm all fds from scratch */
746static void noinline 1563static void noinline
… …
750 1567
751 for (fd = 0; fd < anfdmax; ++fd) 1568 for (fd = 0; fd < anfdmax; ++fd)
752 if (anfds [fd].events) 1569 if (anfds [fd].events)
753 { 1570 {
754 anfds [fd].events = 0; 1571 anfds [fd].events = 0;
1572 anfds [fd].emask = 0;
755 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1573 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
756 } 1574 }
757} 1575}
758 1576
759/*****************************************************************************/ 1577/* used to prepare libev internal fd's */
760 1578/* this is not fork-safe */
761/* towards the root */ 1579inline_speed void
762void inline_speed
763upheap (WT *heap, int k)
764{
765 WT w = heap [k];
766
767 for (;;)
768 {
769 int p = k >> 1;
770
771 /* maybe we could use a dummy element at heap [0]? */
772 if (!p || heap [p]->at <= w->at)
773 break;
774
775 heap [k] = heap [p];
776 ((W)heap [k])->active = k;
777 k = p;
778 }
779
780 heap [k] = w;
781 ((W)heap [k])->active = k;
782}
783
784/* away from the root */
785void inline_speed
786downheap (WT *heap, int N, int k)
787{
788 WT w = heap [k];
789
790 for (;;)
791 {
792 int c = k << 1;
793
794 if (c > N)
795 break;
796
797 c += c < N && heap [c]->at > heap [c + 1]->at
798 ? 1 : 0;
799
800 if (w->at <= heap [c]->at)
801 break;
802
803 heap [k] = heap [c];
804 ((W)heap [k])->active = k;
805
806 k = c;
807 }
808
809 heap [k] = w;
810 ((W)heap [k])->active = k;
811}
812
813void inline_size
814adjustheap (WT *heap, int N, int k)
815{
816 upheap (heap, k);
817 downheap (heap, N, k);
818}
819
820/*****************************************************************************/
821
822typedef struct
823{
824 WL head;
825 EV_ATOMIC_T gotsig;
826} ANSIG;
827
828static ANSIG *signals;
829static int signalmax;
830
831static EV_ATOMIC_T gotsig;
832
833void inline_size
834signals_init (ANSIG *base, int count)
835{
836 while (count--)
837 {
838 base->head = 0;
839 base->gotsig = 0;
840
841 ++base;
842 }
843}
844
845/*****************************************************************************/
846
847void inline_speed
848fd_intern (int fd) 1580fd_intern (int fd)
849{ 1581{
850#ifdef _WIN32 1582#ifdef _WIN32
851 int arg = 1; 1583 unsigned long arg = 1;
852 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1584 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
853#else 1585#else
854 fcntl (fd, F_SETFD, FD_CLOEXEC); 1586 fcntl (fd, F_SETFD, FD_CLOEXEC);
855 fcntl (fd, F_SETFL, O_NONBLOCK); 1587 fcntl (fd, F_SETFL, O_NONBLOCK);
856#endif 1588#endif
857} 1589}
858 1590
1591/*****************************************************************************/
1592
1593/*
1594 * the heap functions want a real array index. array index 0 is guaranteed to not
1595 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1596 * the branching factor of the d-tree.
1597 */
1598
1599/*
1600 * at the moment we allow libev the luxury of two heaps,
1601 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1602 * which is more cache-efficient.
1603 * the difference is about 5% with 50000+ watchers.
1604 */
1605#if EV_USE_4HEAP
1606
1607#define DHEAP 4
1608#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1609#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1610#define UPHEAP_DONE(p,k) ((p) == (k))
1611
1612/* away from the root */
1613inline_speed void
1614downheap (ANHE *heap, int N, int k)
1615{
1616 ANHE he = heap [k];
1617 ANHE *E = heap + N + HEAP0;
1618
1619 for (;;)
1620 {
1621 ev_tstamp minat;
1622 ANHE *minpos;
1623 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1624
1625 /* find minimum child */
1626 if (expect_true (pos + DHEAP - 1 < E))
1627 {
1628 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1629 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1630 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1631 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1632 }
1633 else if (pos < E)
1634 {
1635 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1636 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1637 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1638 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1639 }
1640 else
1641 break;
1642
1643 if (ANHE_at (he) <= minat)
1644 break;
1645
1646 heap [k] = *minpos;
1647 ev_active (ANHE_w (*minpos)) = k;
1648
1649 k = minpos - heap;
1650 }
1651
1652 heap [k] = he;
1653 ev_active (ANHE_w (he)) = k;
1654}
1655
1656#else /* 4HEAP */
1657
1658#define HEAP0 1
1659#define HPARENT(k) ((k) >> 1)
1660#define UPHEAP_DONE(p,k) (!(p))
1661
1662/* away from the root */
1663inline_speed void
1664downheap (ANHE *heap, int N, int k)
1665{
1666 ANHE he = heap [k];
1667
1668 for (;;)
1669 {
1670 int c = k << 1;
1671
1672 if (c >= N + HEAP0)
1673 break;
1674
1675 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1676 ? 1 : 0;
1677
1678 if (ANHE_at (he) <= ANHE_at (heap [c]))
1679 break;
1680
1681 heap [k] = heap [c];
1682 ev_active (ANHE_w (heap [k])) = k;
1683
1684 k = c;
1685 }
1686
1687 heap [k] = he;
1688 ev_active (ANHE_w (he)) = k;
1689}
1690#endif
1691
1692/* towards the root */
1693inline_speed void
1694upheap (ANHE *heap, int k)
1695{
1696 ANHE he = heap [k];
1697
1698 for (;;)
1699 {
1700 int p = HPARENT (k);
1701
1702 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1703 break;
1704
1705 heap [k] = heap [p];
1706 ev_active (ANHE_w (heap [k])) = k;
1707 k = p;
1708 }
1709
1710 heap [k] = he;
1711 ev_active (ANHE_w (he)) = k;
1712}
1713
1714/* move an element suitably so it is in a correct place */
1715inline_size void
1716adjustheap (ANHE *heap, int N, int k)
1717{
1718 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1719 upheap (heap, k);
1720 else
1721 downheap (heap, N, k);
1722}
1723
1724/* rebuild the heap: this function is used only once and executed rarely */
1725inline_size void
1726reheap (ANHE *heap, int N)
1727{
1728 int i;
1729
1730 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1731 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1732 for (i = 0; i < N; ++i)
1733 upheap (heap, i + HEAP0);
1734}
1735
1736/*****************************************************************************/
1737
1738/* associate signal watchers to a signal signal */
1739typedef struct
1740{
1741 EV_ATOMIC_T pending;
1742#if EV_MULTIPLICITY
1743 EV_P;
1744#endif
1745 WL head;
1746} ANSIG;
1747
1748static ANSIG signals [EV_NSIG - 1];
1749
1750/*****************************************************************************/
1751
1752#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1753
859static void noinline 1754static void noinline ecb_cold
860evpipe_init (EV_P) 1755evpipe_init (EV_P)
861{ 1756{
862 if (!ev_is_active (&pipeev)) 1757 if (!ev_is_active (&pipe_w))
863 { 1758 {
864#if EV_USE_EVENTFD 1759# if EV_USE_EVENTFD
1760 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1761 if (evfd < 0 && errno == EINVAL)
865 if ((evfd = eventfd (0, 0)) >= 0) 1762 evfd = eventfd (0, 0);
1763
1764 if (evfd >= 0)
866 { 1765 {
867 evpipe [0] = -1; 1766 evpipe [0] = -1;
868 fd_intern (evfd); 1767 fd_intern (evfd); /* doing it twice doesn't hurt */
869 ev_io_set (&pipeev, evfd, EV_READ); 1768 ev_io_set (&pipe_w, evfd, EV_READ);
870 } 1769 }
871 else 1770 else
872#endif 1771# endif
873 { 1772 {
874 while (pipe (evpipe)) 1773 while (pipe (evpipe))
875 syserr ("(libev) error creating signal/async pipe"); 1774 ev_syserr ("(libev) error creating signal/async pipe");
876 1775
877 fd_intern (evpipe [0]); 1776 fd_intern (evpipe [0]);
878 fd_intern (evpipe [1]); 1777 fd_intern (evpipe [1]);
879 ev_io_set (&pipeev, evpipe [0], EV_READ); 1778 ev_io_set (&pipe_w, evpipe [0], EV_READ);
880 } 1779 }
881 1780
882 ev_io_start (EV_A_ &pipeev); 1781 ev_io_start (EV_A_ &pipe_w);
883 ev_unref (EV_A); /* watcher should not keep loop alive */ 1782 ev_unref (EV_A); /* watcher should not keep loop alive */
884 } 1783 }
885} 1784}
886 1785
887void inline_size 1786inline_speed void
888evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1787evpipe_write (EV_P_ EV_ATOMIC_T *flag)
889{ 1788{
890 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)
891 { 1801 {
1802 int old_errno;
1803
1804 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1805
892 int old_errno = errno; /* save errno because write might clobber it */ 1806 old_errno = errno; /* save errno because write will clobber it */
893
894 *flag = 1;
895 1807
896#if EV_USE_EVENTFD 1808#if EV_USE_EVENTFD
897 if (evfd >= 0) 1809 if (evfd >= 0)
898 { 1810 {
899 uint64_t counter = 1; 1811 uint64_t counter = 1;
900 write (evfd, &counter, sizeof (uint64_t)); 1812 write (evfd, &counter, sizeof (uint64_t));
901 } 1813 }
902 else 1814 else
903#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. */
904 write (evpipe [1], &old_errno, 1); 1822 write (evpipe [1], &(evpipe [1]), 1);
1823 }
905 1824
906 errno = old_errno; 1825 errno = old_errno;
907 } 1826 }
908} 1827}
909 1828
1829/* called whenever the libev signal pipe */
1830/* got some events (signal, async) */
910static void 1831static void
911pipecb (EV_P_ ev_io *iow, int revents) 1832pipecb (EV_P_ ev_io *iow, int revents)
912{ 1833{
1834 int i;
1835
1836 if (revents & EV_READ)
1837 {
913#if EV_USE_EVENTFD 1838#if EV_USE_EVENTFD
914 if (evfd >= 0) 1839 if (evfd >= 0)
915 { 1840 {
916 uint64_t counter = 1; 1841 uint64_t counter;
917 read (evfd, &counter, sizeof (uint64_t)); 1842 read (evfd, &counter, sizeof (uint64_t));
918 } 1843 }
919 else 1844 else
920#endif 1845#endif
921 { 1846 {
922 char dummy; 1847 char dummy;
1848 /* see discussion in evpipe_write when you think this read should be recv in win32 */
923 read (evpipe [0], &dummy, 1); 1849 read (evpipe [0], &dummy, 1);
1850 }
1851 }
1852
1853 pipe_write_skipped = 0;
1854
1855#if EV_SIGNAL_ENABLE
1856 if (sig_pending)
924 } 1857 {
1858 sig_pending = 0;
925 1859
926 if (gotsig && ev_is_default_loop (EV_A)) 1860 for (i = EV_NSIG - 1; i--; )
927 { 1861 if (expect_false (signals [i].pending))
928 int signum;
929 gotsig = 0;
930
931 for (signum = signalmax; signum--; )
932 if (signals [signum].gotsig)
933 ev_feed_signal_event (EV_A_ signum + 1); 1862 ev_feed_signal_event (EV_A_ i + 1);
934 } 1863 }
1864#endif
935 1865
936#if EV_ASYNC_ENABLE 1866#if EV_ASYNC_ENABLE
937 if (gotasync) 1867 if (async_pending)
938 { 1868 {
939 int i; 1869 async_pending = 0;
940 gotasync = 0;
941 1870
942 for (i = asynccnt; i--; ) 1871 for (i = asynccnt; i--; )
943 if (asyncs [i]->sent) 1872 if (asyncs [i]->sent)
944 { 1873 {
945 asyncs [i]->sent = 0; 1874 asyncs [i]->sent = 0;
… …
949#endif 1878#endif
950} 1879}
951 1880
952/*****************************************************************************/ 1881/*****************************************************************************/
953 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
954static void 1900static void
955ev_sighandler (int signum) 1901ev_sighandler (int signum)
956{ 1902{
957#if EV_MULTIPLICITY
958 struct ev_loop *loop = &default_loop_struct;
959#endif
960
961#if _WIN32 1903#ifdef _WIN32
962 signal (signum, ev_sighandler); 1904 signal (signum, ev_sighandler);
963#endif 1905#endif
964 1906
965 signals [signum - 1].gotsig = 1; 1907 ev_feed_signal (signum);
966 evpipe_write (EV_A_ &gotsig);
967} 1908}
968 1909
969void noinline 1910void noinline
970ev_feed_signal_event (EV_P_ int signum) 1911ev_feed_signal_event (EV_P_ int signum)
971{ 1912{
972 WL w; 1913 WL w;
973 1914
1915 if (expect_false (signum <= 0 || signum > EV_NSIG))
1916 return;
1917
1918 --signum;
1919
974#if EV_MULTIPLICITY 1920#if EV_MULTIPLICITY
975 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1921 /* it is permissible to try to feed a signal to the wrong loop */
976#endif 1922 /* or, likely more useful, feeding a signal nobody is waiting for */
977 1923
978 --signum; 1924 if (expect_false (signals [signum].loop != EV_A))
979
980 if (signum < 0 || signum >= signalmax)
981 return; 1925 return;
1926#endif
982 1927
983 signals [signum].gotsig = 0; 1928 signals [signum].pending = 0;
984 1929
985 for (w = signals [signum].head; w; w = w->next) 1930 for (w = signals [signum].head; w; w = w->next)
986 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1931 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
987} 1932}
988 1933
1934#if EV_USE_SIGNALFD
1935static void
1936sigfdcb (EV_P_ ev_io *iow, int revents)
1937{
1938 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1939
1940 for (;;)
1941 {
1942 ssize_t res = read (sigfd, si, sizeof (si));
1943
1944 /* not ISO-C, as res might be -1, but works with SuS */
1945 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1946 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1947
1948 if (res < (ssize_t)sizeof (si))
1949 break;
1950 }
1951}
1952#endif
1953
1954#endif
1955
989/*****************************************************************************/ 1956/*****************************************************************************/
990 1957
1958#if EV_CHILD_ENABLE
991static WL childs [EV_PID_HASHSIZE]; 1959static WL childs [EV_PID_HASHSIZE];
992
993#ifndef _WIN32
994 1960
995static ev_signal childev; 1961static ev_signal childev;
996 1962
997#ifndef WIFCONTINUED 1963#ifndef WIFCONTINUED
998# define WIFCONTINUED(status) 0 1964# define WIFCONTINUED(status) 0
999#endif 1965#endif
1000 1966
1001void inline_speed 1967/* handle a single child status event */
1968inline_speed void
1002child_reap (EV_P_ int chain, int pid, int status) 1969child_reap (EV_P_ int chain, int pid, int status)
1003{ 1970{
1004 ev_child *w; 1971 ev_child *w;
1005 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1972 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1006 1973
1007 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)
1008 { 1975 {
1009 if ((w->pid == pid || !w->pid) 1976 if ((w->pid == pid || !w->pid)
1010 && (!traced || (w->flags & 1))) 1977 && (!traced || (w->flags & 1)))
1011 { 1978 {
1012 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 */
… …
1019 1986
1020#ifndef WCONTINUED 1987#ifndef WCONTINUED
1021# define WCONTINUED 0 1988# define WCONTINUED 0
1022#endif 1989#endif
1023 1990
1991/* called on sigchld etc., calls waitpid */
1024static void 1992static void
1025childcb (EV_P_ ev_signal *sw, int revents) 1993childcb (EV_P_ ev_signal *sw, int revents)
1026{ 1994{
1027 int pid, status; 1995 int pid, status;
1028 1996
… …
1036 /* 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 */
1037 /* 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 */
1038 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2006 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1039 2007
1040 child_reap (EV_A_ pid, pid, status); 2008 child_reap (EV_A_ pid, pid, status);
1041 if (EV_PID_HASHSIZE > 1) 2009 if ((EV_PID_HASHSIZE) > 1)
1042 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 */
1043} 2011}
1044 2012
1045#endif 2013#endif
1046 2014
1047/*****************************************************************************/ 2015/*****************************************************************************/
1048 2016
2017#if EV_USE_IOCP
2018# include "ev_iocp.c"
2019#endif
1049#if EV_USE_PORT 2020#if EV_USE_PORT
1050# include "ev_port.c" 2021# include "ev_port.c"
1051#endif 2022#endif
1052#if EV_USE_KQUEUE 2023#if EV_USE_KQUEUE
1053# include "ev_kqueue.c" 2024# include "ev_kqueue.c"
… …
1060#endif 2031#endif
1061#if EV_USE_SELECT 2032#if EV_USE_SELECT
1062# include "ev_select.c" 2033# include "ev_select.c"
1063#endif 2034#endif
1064 2035
1065int 2036int ecb_cold
1066ev_version_major (void) 2037ev_version_major (void)
1067{ 2038{
1068 return EV_VERSION_MAJOR; 2039 return EV_VERSION_MAJOR;
1069} 2040}
1070 2041
1071int 2042int ecb_cold
1072ev_version_minor (void) 2043ev_version_minor (void)
1073{ 2044{
1074 return EV_VERSION_MINOR; 2045 return EV_VERSION_MINOR;
1075} 2046}
1076 2047
1077/* 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 */
1078int inline_size 2049int inline_size ecb_cold
1079enable_secure (void) 2050enable_secure (void)
1080{ 2051{
1081#ifdef _WIN32 2052#ifdef _WIN32
1082 return 0; 2053 return 0;
1083#else 2054#else
1084 return getuid () != geteuid () 2055 return getuid () != geteuid ()
1085 || getgid () != getegid (); 2056 || getgid () != getegid ();
1086#endif 2057#endif
1087} 2058}
1088 2059
1089unsigned int 2060unsigned int ecb_cold
1090ev_supported_backends (void) 2061ev_supported_backends (void)
1091{ 2062{
1092 unsigned int flags = 0; 2063 unsigned int flags = 0;
1093 2064
1094 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2065 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1098 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2069 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1099 2070
1100 return flags; 2071 return flags;
1101} 2072}
1102 2073
1103unsigned int 2074unsigned int ecb_cold
1104ev_recommended_backends (void) 2075ev_recommended_backends (void)
1105{ 2076{
1106 unsigned int flags = ev_supported_backends (); 2077 unsigned int flags = ev_supported_backends ();
1107 2078
1108#ifndef __NetBSD__ 2079#ifndef __NetBSD__
1109 /* kqueue is borked on everything but netbsd apparently */ 2080 /* kqueue is borked on everything but netbsd apparently */
1110 /* it usually doesn't work correctly on anything but sockets and pipes */ 2081 /* it usually doesn't work correctly on anything but sockets and pipes */
1111 flags &= ~EVBACKEND_KQUEUE; 2082 flags &= ~EVBACKEND_KQUEUE;
1112#endif 2083#endif
1113#ifdef __APPLE__ 2084#ifdef __APPLE__
1114 // flags &= ~EVBACKEND_KQUEUE; for documentation 2085 /* only select works correctly on that "unix-certified" platform */
1115 flags &= ~EVBACKEND_POLL; 2086 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2087 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2088#endif
2089#ifdef __FreeBSD__
2090 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1116#endif 2091#endif
1117 2092
1118 return flags; 2093 return flags;
1119} 2094}
1120 2095
1121unsigned int 2096unsigned int ecb_cold
1122ev_embeddable_backends (void) 2097ev_embeddable_backends (void)
1123{ 2098{
1124 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2099 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1125 2100
1126 /* 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 */
1127 /* please fix it and tell me how to detect the fix */ 2102 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1128 flags &= ~EVBACKEND_EPOLL; 2103 flags &= ~EVBACKEND_EPOLL;
1129 2104
1130 return flags; 2105 return flags;
1131} 2106}
1132 2107
1133unsigned int 2108unsigned int
1134ev_backend (EV_P) 2109ev_backend (EV_P)
1135{ 2110{
1136 return backend; 2111 return backend;
1137} 2112}
1138 2113
2114#if EV_FEATURE_API
1139unsigned int 2115unsigned int
1140ev_loop_count (EV_P) 2116ev_iteration (EV_P)
1141{ 2117{
1142 return loop_count; 2118 return loop_count;
2119}
2120
2121unsigned int
2122ev_depth (EV_P)
2123{
2124 return loop_depth;
1143} 2125}
1144 2126
1145void 2127void
1146ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2128ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1147{ 2129{
… …
1152ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2134ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1153{ 2135{
1154 timeout_blocktime = interval; 2136 timeout_blocktime = interval;
1155} 2137}
1156 2138
2139void
2140ev_set_userdata (EV_P_ void *data)
2141{
2142 userdata = data;
2143}
2144
2145void *
2146ev_userdata (EV_P)
2147{
2148 return userdata;
2149}
2150
2151void
2152ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2153{
2154 invoke_cb = invoke_pending_cb;
2155}
2156
2157void
2158ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2159{
2160 release_cb = release;
2161 acquire_cb = acquire;
2162}
2163#endif
2164
2165/* initialise a loop structure, must be zero-initialised */
1157static void noinline 2166static void noinline ecb_cold
1158loop_init (EV_P_ unsigned int flags) 2167loop_init (EV_P_ unsigned int flags)
1159{ 2168{
1160 if (!backend) 2169 if (!backend)
1161 { 2170 {
2171 origflags = flags;
2172
2173#if EV_USE_REALTIME
2174 if (!have_realtime)
2175 {
2176 struct timespec ts;
2177
2178 if (!clock_gettime (CLOCK_REALTIME, &ts))
2179 have_realtime = 1;
2180 }
2181#endif
2182
1162#if EV_USE_MONOTONIC 2183#if EV_USE_MONOTONIC
2184 if (!have_monotonic)
1163 { 2185 {
1164 struct timespec ts; 2186 struct timespec ts;
2187
1165 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2188 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1166 have_monotonic = 1; 2189 have_monotonic = 1;
1167 } 2190 }
1168#endif
1169
1170 ev_rt_now = ev_time ();
1171 mn_now = get_clock ();
1172 now_floor = mn_now;
1173 rtmn_diff = ev_rt_now - mn_now;
1174
1175 io_blocktime = 0.;
1176 timeout_blocktime = 0.;
1177 backend = 0;
1178 backend_fd = -1;
1179 gotasync = 0;
1180#if EV_USE_INOTIFY
1181 fs_fd = -2;
1182#endif 2191#endif
1183 2192
1184 /* pid check not overridable via env */ 2193 /* pid check not overridable via env */
1185#ifndef _WIN32 2194#ifndef _WIN32
1186 if (flags & EVFLAG_FORKCHECK) 2195 if (flags & EVFLAG_FORKCHECK)
… …
1190 if (!(flags & EVFLAG_NOENV) 2199 if (!(flags & EVFLAG_NOENV)
1191 && !enable_secure () 2200 && !enable_secure ()
1192 && getenv ("LIBEV_FLAGS")) 2201 && getenv ("LIBEV_FLAGS"))
1193 flags = atoi (getenv ("LIBEV_FLAGS")); 2202 flags = atoi (getenv ("LIBEV_FLAGS"));
1194 2203
1195 if (!(flags & 0x0000ffffU)) 2204 ev_rt_now = ev_time ();
2205 mn_now = get_clock ();
2206 now_floor = mn_now;
2207 rtmn_diff = ev_rt_now - mn_now;
2208#if EV_FEATURE_API
2209 invoke_cb = ev_invoke_pending;
2210#endif
2211
2212 io_blocktime = 0.;
2213 timeout_blocktime = 0.;
2214 backend = 0;
2215 backend_fd = -1;
2216 sig_pending = 0;
2217#if EV_ASYNC_ENABLE
2218 async_pending = 0;
2219#endif
2220 pipe_write_skipped = 0;
2221 pipe_write_wanted = 0;
2222#if EV_USE_INOTIFY
2223 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2224#endif
2225#if EV_USE_SIGNALFD
2226 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2227#endif
2228
2229 if (!(flags & EVBACKEND_MASK))
1196 flags |= ev_recommended_backends (); 2230 flags |= ev_recommended_backends ();
1197 2231
2232#if EV_USE_IOCP
2233 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2234#endif
1198#if EV_USE_PORT 2235#if EV_USE_PORT
1199 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2236 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1200#endif 2237#endif
1201#if EV_USE_KQUEUE 2238#if EV_USE_KQUEUE
1202 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2239 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1209#endif 2246#endif
1210#if EV_USE_SELECT 2247#if EV_USE_SELECT
1211 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2248 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1212#endif 2249#endif
1213 2250
2251 ev_prepare_init (&pending_w, pendingcb);
2252
2253#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1214 ev_init (&pipeev, pipecb); 2254 ev_init (&pipe_w, pipecb);
1215 ev_set_priority (&pipeev, EV_MAXPRI); 2255 ev_set_priority (&pipe_w, EV_MAXPRI);
2256#endif
1216 } 2257 }
1217} 2258}
1218 2259
1219static void noinline 2260/* free up a loop structure */
2261void ecb_cold
1220loop_destroy (EV_P) 2262ev_loop_destroy (EV_P)
1221{ 2263{
1222 int i; 2264 int i;
1223 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
2288
1224 if (ev_is_active (&pipeev)) 2289 if (ev_is_active (&pipe_w))
1225 { 2290 {
1226 ev_ref (EV_A); /* signal watcher */ 2291 /*ev_ref (EV_A);*/
1227 ev_io_stop (EV_A_ &pipeev); 2292 /*ev_io_stop (EV_A_ &pipe_w);*/
1228 2293
1229#if EV_USE_EVENTFD 2294#if EV_USE_EVENTFD
1230 if (evfd >= 0) 2295 if (evfd >= 0)
1231 close (evfd); 2296 close (evfd);
1232#endif 2297#endif
1233 2298
1234 if (evpipe [0] >= 0) 2299 if (evpipe [0] >= 0)
1235 { 2300 {
1236 close (evpipe [0]); 2301 EV_WIN32_CLOSE_FD (evpipe [0]);
1237 close (evpipe [1]); 2302 EV_WIN32_CLOSE_FD (evpipe [1]);
1238 } 2303 }
1239 } 2304 }
2305
2306#if EV_USE_SIGNALFD
2307 if (ev_is_active (&sigfd_w))
2308 close (sigfd);
2309#endif
1240 2310
1241#if EV_USE_INOTIFY 2311#if EV_USE_INOTIFY
1242 if (fs_fd >= 0) 2312 if (fs_fd >= 0)
1243 close (fs_fd); 2313 close (fs_fd);
1244#endif 2314#endif
1245 2315
1246 if (backend_fd >= 0) 2316 if (backend_fd >= 0)
1247 close (backend_fd); 2317 close (backend_fd);
1248 2318
2319#if EV_USE_IOCP
2320 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2321#endif
1249#if EV_USE_PORT 2322#if EV_USE_PORT
1250 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2323 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1251#endif 2324#endif
1252#if EV_USE_KQUEUE 2325#if EV_USE_KQUEUE
1253 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2326 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1268#if EV_IDLE_ENABLE 2341#if EV_IDLE_ENABLE
1269 array_free (idle, [i]); 2342 array_free (idle, [i]);
1270#endif 2343#endif
1271 } 2344 }
1272 2345
1273 ev_free (anfds); anfdmax = 0; 2346 ev_free (anfds); anfds = 0; anfdmax = 0;
1274 2347
1275 /* have to use the microsoft-never-gets-it-right macro */ 2348 /* have to use the microsoft-never-gets-it-right macro */
2349 array_free (rfeed, EMPTY);
1276 array_free (fdchange, EMPTY); 2350 array_free (fdchange, EMPTY);
1277 array_free (timer, EMPTY); 2351 array_free (timer, EMPTY);
1278#if EV_PERIODIC_ENABLE 2352#if EV_PERIODIC_ENABLE
1279 array_free (periodic, EMPTY); 2353 array_free (periodic, EMPTY);
1280#endif 2354#endif
1281#if EV_FORK_ENABLE 2355#if EV_FORK_ENABLE
1282 array_free (fork, EMPTY); 2356 array_free (fork, EMPTY);
1283#endif 2357#endif
2358#if EV_CLEANUP_ENABLE
2359 array_free (cleanup, EMPTY);
2360#endif
1284 array_free (prepare, EMPTY); 2361 array_free (prepare, EMPTY);
1285 array_free (check, EMPTY); 2362 array_free (check, EMPTY);
1286#if EV_ASYNC_ENABLE 2363#if EV_ASYNC_ENABLE
1287 array_free (async, EMPTY); 2364 array_free (async, EMPTY);
1288#endif 2365#endif
1289 2366
1290 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
1291} 2377}
1292 2378
1293#if EV_USE_INOTIFY 2379#if EV_USE_INOTIFY
1294void inline_size infy_fork (EV_P); 2380inline_size void infy_fork (EV_P);
1295#endif 2381#endif
1296 2382
1297void inline_size 2383inline_size void
1298loop_fork (EV_P) 2384loop_fork (EV_P)
1299{ 2385{
1300#if EV_USE_PORT 2386#if EV_USE_PORT
1301 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1302#endif 2388#endif
… …
1308#endif 2394#endif
1309#if EV_USE_INOTIFY 2395#if EV_USE_INOTIFY
1310 infy_fork (EV_A); 2396 infy_fork (EV_A);
1311#endif 2397#endif
1312 2398
1313 if (ev_is_active (&pipeev)) 2399 if (ev_is_active (&pipe_w))
1314 { 2400 {
1315 /* this "locks" the handlers against writing to the pipe */ 2401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1316 /* while we modify the fd vars */
1317 gotsig = 1;
1318#if EV_ASYNC_ENABLE
1319 gotasync = 1;
1320#endif
1321 2402
1322 ev_ref (EV_A); 2403 ev_ref (EV_A);
1323 ev_io_stop (EV_A_ &pipeev); 2404 ev_io_stop (EV_A_ &pipe_w);
1324 2405
1325#if EV_USE_EVENTFD 2406#if EV_USE_EVENTFD
1326 if (evfd >= 0) 2407 if (evfd >= 0)
1327 close (evfd); 2408 close (evfd);
1328#endif 2409#endif
1329 2410
1330 if (evpipe [0] >= 0) 2411 if (evpipe [0] >= 0)
1331 { 2412 {
1332 close (evpipe [0]); 2413 EV_WIN32_CLOSE_FD (evpipe [0]);
1333 close (evpipe [1]); 2414 EV_WIN32_CLOSE_FD (evpipe [1]);
1334 } 2415 }
1335 2416
2417#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1336 evpipe_init (EV_A); 2418 evpipe_init (EV_A);
1337 /* now iterate over everything, in case we missed something */ 2419 /* now iterate over everything, in case we missed something */
1338 pipecb (EV_A_ &pipeev, EV_READ); 2420 pipecb (EV_A_ &pipe_w, EV_READ);
2421#endif
1339 } 2422 }
1340 2423
1341 postfork = 0; 2424 postfork = 0;
1342} 2425}
1343 2426
1344#if EV_MULTIPLICITY 2427#if EV_MULTIPLICITY
2428
1345struct ev_loop * 2429struct ev_loop * ecb_cold
1346ev_loop_new (unsigned int flags) 2430ev_loop_new (unsigned int flags)
1347{ 2431{
1348 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2432 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1349 2433
1350 memset (loop, 0, sizeof (struct ev_loop)); 2434 memset (EV_A, 0, sizeof (struct ev_loop));
1351
1352 loop_init (EV_A_ flags); 2435 loop_init (EV_A_ flags);
1353 2436
1354 if (ev_backend (EV_A)) 2437 if (ev_backend (EV_A))
1355 return loop; 2438 return EV_A;
1356 2439
2440 ev_free (EV_A);
1357 return 0; 2441 return 0;
1358} 2442}
1359 2443
1360void 2444#endif /* multiplicity */
1361ev_loop_destroy (EV_P)
1362{
1363 loop_destroy (EV_A);
1364 ev_free (loop);
1365}
1366 2445
1367void 2446#if EV_VERIFY
1368ev_loop_fork (EV_P) 2447static void noinline ecb_cold
2448verify_watcher (EV_P_ W w)
1369{ 2449{
1370 postfork = 1; /* must be in line with ev_default_fork */ 2450 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1371}
1372 2451
2452 if (w->pending)
2453 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2454}
2455
2456static void noinline ecb_cold
2457verify_heap (EV_P_ ANHE *heap, int N)
2458{
2459 int i;
2460
2461 for (i = HEAP0; i < N + HEAP0; ++i)
2462 {
2463 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2464 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2465 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2466
2467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2468 }
2469}
2470
2471static void noinline ecb_cold
2472array_verify (EV_P_ W *ws, int cnt)
2473{
2474 while (cnt--)
2475 {
2476 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2477 verify_watcher (EV_A_ ws [cnt]);
2478 }
2479}
2480#endif
2481
2482#if EV_FEATURE_API
2483void ecb_cold
2484ev_verify (EV_P)
2485{
2486#if EV_VERIFY
2487 int i;
2488 WL w;
2489
2490 assert (activecnt >= -1);
2491
2492 assert (fdchangemax >= fdchangecnt);
2493 for (i = 0; i < fdchangecnt; ++i)
2494 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2495
2496 assert (anfdmax >= 0);
2497 for (i = 0; i < anfdmax; ++i)
2498 for (w = anfds [i].head; w; w = w->next)
2499 {
2500 verify_watcher (EV_A_ (W)w);
2501 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2502 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2503 }
2504
2505 assert (timermax >= timercnt);
2506 verify_heap (EV_A_ timers, timercnt);
2507
2508#if EV_PERIODIC_ENABLE
2509 assert (periodicmax >= periodiccnt);
2510 verify_heap (EV_A_ periodics, periodiccnt);
2511#endif
2512
2513 for (i = NUMPRI; i--; )
2514 {
2515 assert (pendingmax [i] >= pendingcnt [i]);
2516#if EV_IDLE_ENABLE
2517 assert (idleall >= 0);
2518 assert (idlemax [i] >= idlecnt [i]);
2519 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2520#endif
2521 }
2522
2523#if EV_FORK_ENABLE
2524 assert (forkmax >= forkcnt);
2525 array_verify (EV_A_ (W *)forks, forkcnt);
2526#endif
2527
2528#if EV_CLEANUP_ENABLE
2529 assert (cleanupmax >= cleanupcnt);
2530 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2531#endif
2532
2533#if EV_ASYNC_ENABLE
2534 assert (asyncmax >= asynccnt);
2535 array_verify (EV_A_ (W *)asyncs, asynccnt);
2536#endif
2537
2538#if EV_PREPARE_ENABLE
2539 assert (preparemax >= preparecnt);
2540 array_verify (EV_A_ (W *)prepares, preparecnt);
2541#endif
2542
2543#if EV_CHECK_ENABLE
2544 assert (checkmax >= checkcnt);
2545 array_verify (EV_A_ (W *)checks, checkcnt);
2546#endif
2547
2548# if 0
2549#if EV_CHILD_ENABLE
2550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2551 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2552#endif
2553# endif
2554#endif
2555}
1373#endif 2556#endif
1374 2557
1375#if EV_MULTIPLICITY 2558#if EV_MULTIPLICITY
1376struct ev_loop * 2559struct ev_loop * ecb_cold
1377ev_default_loop_init (unsigned int flags)
1378#else 2560#else
1379int 2561int
2562#endif
1380ev_default_loop (unsigned int flags) 2563ev_default_loop (unsigned int flags)
1381#endif
1382{ 2564{
1383 if (!ev_default_loop_ptr) 2565 if (!ev_default_loop_ptr)
1384 { 2566 {
1385#if EV_MULTIPLICITY 2567#if EV_MULTIPLICITY
1386 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2568 EV_P = ev_default_loop_ptr = &default_loop_struct;
1387#else 2569#else
1388 ev_default_loop_ptr = 1; 2570 ev_default_loop_ptr = 1;
1389#endif 2571#endif
1390 2572
1391 loop_init (EV_A_ flags); 2573 loop_init (EV_A_ flags);
1392 2574
1393 if (ev_backend (EV_A)) 2575 if (ev_backend (EV_A))
1394 { 2576 {
1395#ifndef _WIN32 2577#if EV_CHILD_ENABLE
1396 ev_signal_init (&childev, childcb, SIGCHLD); 2578 ev_signal_init (&childev, childcb, SIGCHLD);
1397 ev_set_priority (&childev, EV_MAXPRI); 2579 ev_set_priority (&childev, EV_MAXPRI);
1398 ev_signal_start (EV_A_ &childev); 2580 ev_signal_start (EV_A_ &childev);
1399 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2581 ev_unref (EV_A); /* child watcher should not keep loop alive */
1400#endif 2582#endif
… …
1405 2587
1406 return ev_default_loop_ptr; 2588 return ev_default_loop_ptr;
1407} 2589}
1408 2590
1409void 2591void
1410ev_default_destroy (void) 2592ev_loop_fork (EV_P)
1411{ 2593{
1412#if EV_MULTIPLICITY
1413 struct ev_loop *loop = ev_default_loop_ptr;
1414#endif
1415
1416#ifndef _WIN32
1417 ev_ref (EV_A); /* child watcher */
1418 ev_signal_stop (EV_A_ &childev);
1419#endif
1420
1421 loop_destroy (EV_A);
1422}
1423
1424void
1425ev_default_fork (void)
1426{
1427#if EV_MULTIPLICITY
1428 struct ev_loop *loop = ev_default_loop_ptr;
1429#endif
1430
1431 if (backend)
1432 postfork = 1; /* must be in line with ev_loop_fork */ 2594 postfork = 1; /* must be in line with ev_default_fork */
1433} 2595}
1434 2596
1435/*****************************************************************************/ 2597/*****************************************************************************/
1436 2598
1437void 2599void
1438ev_invoke (EV_P_ void *w, int revents) 2600ev_invoke (EV_P_ void *w, int revents)
1439{ 2601{
1440 EV_CB_INVOKE ((W)w, revents); 2602 EV_CB_INVOKE ((W)w, revents);
1441} 2603}
1442 2604
1443void inline_speed 2605unsigned int
1444call_pending (EV_P) 2606ev_pending_count (EV_P)
2607{
2608 int pri;
2609 unsigned int count = 0;
2610
2611 for (pri = NUMPRI; pri--; )
2612 count += pendingcnt [pri];
2613
2614 return count;
2615}
2616
2617void noinline
2618ev_invoke_pending (EV_P)
1445{ 2619{
1446 int pri; 2620 int pri;
1447 2621
1448 for (pri = NUMPRI; pri--; ) 2622 for (pri = NUMPRI; pri--; )
1449 while (pendingcnt [pri]) 2623 while (pendingcnt [pri])
1450 { 2624 {
1451 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2625 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1452 2626
1453 if (expect_true (p->w))
1454 {
1455 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1456
1457 p->w->pending = 0; 2627 p->w->pending = 0;
1458 EV_CB_INVOKE (p->w, p->events); 2628 EV_CB_INVOKE (p->w, p->events);
1459 } 2629 EV_FREQUENT_CHECK;
1460 } 2630 }
1461} 2631}
1462 2632
1463void inline_size
1464timers_reify (EV_P)
1465{
1466 while (timercnt && ev_at (timers [1]) <= mn_now)
1467 {
1468 ev_timer *w = (ev_timer *)timers [1];
1469
1470 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1471
1472 /* first reschedule or stop timer */
1473 if (w->repeat)
1474 {
1475 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1476
1477 ev_at (w) += w->repeat;
1478 if (ev_at (w) < mn_now)
1479 ev_at (w) = mn_now;
1480
1481 downheap (timers, timercnt, 1);
1482 }
1483 else
1484 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1485
1486 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1487 }
1488}
1489
1490#if EV_PERIODIC_ENABLE
1491void inline_size
1492periodics_reify (EV_P)
1493{
1494 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1495 {
1496 ev_periodic *w = (ev_periodic *)periodics [1];
1497
1498 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1499
1500 /* first reschedule or stop timer */
1501 if (w->reschedule_cb)
1502 {
1503 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1504 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1505 downheap (periodics, periodiccnt, 1);
1506 }
1507 else if (w->interval)
1508 {
1509 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1510 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1511 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1512 downheap (periodics, periodiccnt, 1);
1513 }
1514 else
1515 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1516
1517 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1518 }
1519}
1520
1521static void noinline
1522periodics_reschedule (EV_P)
1523{
1524 int i;
1525
1526 /* adjust periodics after time jump */
1527 for (i = 0; i < periodiccnt; ++i)
1528 {
1529 ev_periodic *w = (ev_periodic *)periodics [i];
1530
1531 if (w->reschedule_cb)
1532 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1533 else if (w->interval)
1534 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1535 }
1536
1537 /* now rebuild the heap */
1538 for (i = periodiccnt >> 1; i--; )
1539 downheap (periodics, periodiccnt, i);
1540}
1541#endif
1542
1543#if EV_IDLE_ENABLE 2633#if EV_IDLE_ENABLE
1544void inline_size 2634/* make idle watchers pending. this handles the "call-idle */
2635/* only when higher priorities are idle" logic */
2636inline_size void
1545idle_reify (EV_P) 2637idle_reify (EV_P)
1546{ 2638{
1547 if (expect_false (idleall)) 2639 if (expect_false (idleall))
1548 { 2640 {
1549 int pri; 2641 int pri;
… …
1561 } 2653 }
1562 } 2654 }
1563} 2655}
1564#endif 2656#endif
1565 2657
1566void inline_speed 2658/* make timers pending */
2659inline_size void
2660timers_reify (EV_P)
2661{
2662 EV_FREQUENT_CHECK;
2663
2664 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2665 {
2666 do
2667 {
2668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2669
2670 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2671
2672 /* first reschedule or stop timer */
2673 if (w->repeat)
2674 {
2675 ev_at (w) += w->repeat;
2676 if (ev_at (w) < mn_now)
2677 ev_at (w) = mn_now;
2678
2679 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2680
2681 ANHE_at_cache (timers [HEAP0]);
2682 downheap (timers, timercnt, HEAP0);
2683 }
2684 else
2685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2686
2687 EV_FREQUENT_CHECK;
2688 feed_reverse (EV_A_ (W)w);
2689 }
2690 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2691
2692 feed_reverse_done (EV_A_ EV_TIMER);
2693 }
2694}
2695
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
2722/* make periodics pending */
2723inline_size void
2724periodics_reify (EV_P)
2725{
2726 EV_FREQUENT_CHECK;
2727
2728 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2729 {
2730 int feed_count = 0;
2731
2732 do
2733 {
2734 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2735
2736 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2737
2738 /* first reschedule or stop timer */
2739 if (w->reschedule_cb)
2740 {
2741 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2742
2743 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2744
2745 ANHE_at_cache (periodics [HEAP0]);
2746 downheap (periodics, periodiccnt, HEAP0);
2747 }
2748 else if (w->interval)
2749 {
2750 periodic_recalc (EV_A_ w);
2751 ANHE_at_cache (periodics [HEAP0]);
2752 downheap (periodics, periodiccnt, HEAP0);
2753 }
2754 else
2755 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2756
2757 EV_FREQUENT_CHECK;
2758 feed_reverse (EV_A_ (W)w);
2759 }
2760 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2761
2762 feed_reverse_done (EV_A_ EV_PERIODIC);
2763 }
2764}
2765
2766/* simply recalculate all periodics */
2767/* TODO: maybe ensure that at least one event happens when jumping forward? */
2768static void noinline ecb_cold
2769periodics_reschedule (EV_P)
2770{
2771 int i;
2772
2773 /* adjust periodics after time jump */
2774 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2775 {
2776 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2777
2778 if (w->reschedule_cb)
2779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2780 else if (w->interval)
2781 periodic_recalc (EV_A_ w);
2782
2783 ANHE_at_cache (periodics [i]);
2784 }
2785
2786 reheap (periodics, periodiccnt);
2787}
2788#endif
2789
2790/* adjust all timers by a given offset */
2791static void noinline ecb_cold
2792timers_reschedule (EV_P_ ev_tstamp adjust)
2793{
2794 int i;
2795
2796 for (i = 0; i < timercnt; ++i)
2797 {
2798 ANHE *he = timers + i + HEAP0;
2799 ANHE_w (*he)->at += adjust;
2800 ANHE_at_cache (*he);
2801 }
2802}
2803
2804/* fetch new monotonic and realtime times from the kernel */
2805/* also detect if there was a timejump, and act accordingly */
2806inline_speed void
1567time_update (EV_P_ ev_tstamp max_block) 2807time_update (EV_P_ ev_tstamp max_block)
1568{ 2808{
1569 int i;
1570
1571#if EV_USE_MONOTONIC 2809#if EV_USE_MONOTONIC
1572 if (expect_true (have_monotonic)) 2810 if (expect_true (have_monotonic))
1573 { 2811 {
2812 int i;
1574 ev_tstamp odiff = rtmn_diff; 2813 ev_tstamp odiff = rtmn_diff;
1575 2814
1576 mn_now = get_clock (); 2815 mn_now = get_clock ();
1577 2816
1578 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2817 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1594 * 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
1595 * in the unlikely event of having been preempted here. 2834 * in the unlikely event of having been preempted here.
1596 */ 2835 */
1597 for (i = 4; --i; ) 2836 for (i = 4; --i; )
1598 { 2837 {
2838 ev_tstamp diff;
1599 rtmn_diff = ev_rt_now - mn_now; 2839 rtmn_diff = ev_rt_now - mn_now;
1600 2840
1601 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2841 diff = odiff - rtmn_diff;
2842
2843 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1602 return; /* all is well */ 2844 return; /* all is well */
1603 2845
1604 ev_rt_now = ev_time (); 2846 ev_rt_now = ev_time ();
1605 mn_now = get_clock (); 2847 mn_now = get_clock ();
1606 now_floor = mn_now; 2848 now_floor = mn_now;
1607 } 2849 }
1608 2850
2851 /* no timer adjustment, as the monotonic clock doesn't jump */
2852 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1609# if EV_PERIODIC_ENABLE 2853# if EV_PERIODIC_ENABLE
1610 periodics_reschedule (EV_A); 2854 periodics_reschedule (EV_A);
1611# endif 2855# endif
1612 /* no timer adjustment, as the monotonic clock doesn't jump */
1613 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1614 } 2856 }
1615 else 2857 else
1616#endif 2858#endif
1617 { 2859 {
1618 ev_rt_now = ev_time (); 2860 ev_rt_now = ev_time ();
1619 2861
1620 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2862 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1621 { 2863 {
2864 /* adjust timers. this is easy, as the offset is the same for all of them */
2865 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1622#if EV_PERIODIC_ENABLE 2866#if EV_PERIODIC_ENABLE
1623 periodics_reschedule (EV_A); 2867 periodics_reschedule (EV_A);
1624#endif 2868#endif
1625 /* adjust timers. this is easy, as the offset is the same for all of them */
1626 for (i = 1; i <= timercnt; ++i)
1627 ev_at (timers [i]) += ev_rt_now - mn_now;
1628 } 2869 }
1629 2870
1630 mn_now = ev_rt_now; 2871 mn_now = ev_rt_now;
1631 } 2872 }
1632} 2873}
1633 2874
1634void 2875void
1635ev_ref (EV_P)
1636{
1637 ++activecnt;
1638}
1639
1640void
1641ev_unref (EV_P)
1642{
1643 --activecnt;
1644}
1645
1646static int loop_done;
1647
1648void
1649ev_loop (EV_P_ int flags) 2876ev_run (EV_P_ int flags)
1650{ 2877{
2878#if EV_FEATURE_API
2879 ++loop_depth;
2880#endif
2881
2882 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2883
1651 loop_done = EVUNLOOP_CANCEL; 2884 loop_done = EVBREAK_CANCEL;
1652 2885
1653 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2886 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1654 2887
1655 do 2888 do
1656 { 2889 {
2890#if EV_VERIFY >= 2
2891 ev_verify (EV_A);
2892#endif
2893
1657#ifndef _WIN32 2894#ifndef _WIN32
1658 if (expect_false (curpid)) /* penalise the forking check even more */ 2895 if (expect_false (curpid)) /* penalise the forking check even more */
1659 if (expect_false (getpid () != curpid)) 2896 if (expect_false (getpid () != curpid))
1660 { 2897 {
1661 curpid = getpid (); 2898 curpid = getpid ();
… …
1667 /* we might have forked, so queue fork handlers */ 2904 /* we might have forked, so queue fork handlers */
1668 if (expect_false (postfork)) 2905 if (expect_false (postfork))
1669 if (forkcnt) 2906 if (forkcnt)
1670 { 2907 {
1671 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2908 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1672 call_pending (EV_A); 2909 EV_INVOKE_PENDING;
1673 } 2910 }
1674#endif 2911#endif
1675 2912
2913#if EV_PREPARE_ENABLE
1676 /* queue prepare watchers (and execute them) */ 2914 /* queue prepare watchers (and execute them) */
1677 if (expect_false (preparecnt)) 2915 if (expect_false (preparecnt))
1678 { 2916 {
1679 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1680 call_pending (EV_A); 2918 EV_INVOKE_PENDING;
1681 } 2919 }
2920#endif
1682 2921
1683 if (expect_false (!activecnt)) 2922 if (expect_false (loop_done))
1684 break; 2923 break;
1685 2924
1686 /* we might have forked, so reify kernel state if necessary */ 2925 /* we might have forked, so reify kernel state if necessary */
1687 if (expect_false (postfork)) 2926 if (expect_false (postfork))
1688 loop_fork (EV_A); 2927 loop_fork (EV_A);
… …
1693 /* calculate blocking time */ 2932 /* calculate blocking time */
1694 { 2933 {
1695 ev_tstamp waittime = 0.; 2934 ev_tstamp waittime = 0.;
1696 ev_tstamp sleeptime = 0.; 2935 ev_tstamp sleeptime = 0.;
1697 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
1698 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2948 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1699 { 2949 {
1700 /* update time to cancel out callback processing overhead */
1701 time_update (EV_A_ 1e100);
1702
1703 waittime = MAX_BLOCKTIME; 2950 waittime = MAX_BLOCKTIME;
1704 2951
1705 if (timercnt) 2952 if (timercnt)
1706 { 2953 {
1707 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge; 2954 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1708 if (waittime > to) waittime = to; 2955 if (waittime > to) waittime = to;
1709 } 2956 }
1710 2957
1711#if EV_PERIODIC_ENABLE 2958#if EV_PERIODIC_ENABLE
1712 if (periodiccnt) 2959 if (periodiccnt)
1713 { 2960 {
1714 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge; 2961 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1715 if (waittime > to) waittime = to; 2962 if (waittime > to) waittime = to;
1716 } 2963 }
1717#endif 2964#endif
1718 2965
2966 /* don't let timeouts decrease the waittime below timeout_blocktime */
1719 if (expect_false (waittime < timeout_blocktime)) 2967 if (expect_false (waittime < timeout_blocktime))
1720 waittime = timeout_blocktime; 2968 waittime = timeout_blocktime;
1721 2969
1722 sleeptime = waittime - backend_fudge; 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;
1723 2974
2975 /* extra check because io_blocktime is commonly 0 */
1724 if (expect_true (sleeptime > io_blocktime)) 2976 if (expect_false (io_blocktime))
1725 sleeptime = io_blocktime;
1726
1727 if (sleeptime)
1728 { 2977 {
2978 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2979
2980 if (sleeptime > waittime - backend_mintime)
2981 sleeptime = waittime - backend_mintime;
2982
2983 if (expect_true (sleeptime > 0.))
2984 {
1729 ev_sleep (sleeptime); 2985 ev_sleep (sleeptime);
1730 waittime -= sleeptime; 2986 waittime -= sleeptime;
2987 }
1731 } 2988 }
1732 } 2989 }
1733 2990
2991#if EV_FEATURE_API
1734 ++loop_count; 2992 ++loop_count;
2993#endif
2994 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1735 backend_poll (EV_A_ waittime); 2995 backend_poll (EV_A_ waittime);
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
1736 3006
1737 /* update ev_rt_now, do magic */ 3007 /* update ev_rt_now, do magic */
1738 time_update (EV_A_ waittime + sleeptime); 3008 time_update (EV_A_ waittime + sleeptime);
1739 } 3009 }
1740 3010
… …
1747#if EV_IDLE_ENABLE 3017#if EV_IDLE_ENABLE
1748 /* queue idle watchers unless other events are pending */ 3018 /* queue idle watchers unless other events are pending */
1749 idle_reify (EV_A); 3019 idle_reify (EV_A);
1750#endif 3020#endif
1751 3021
3022#if EV_CHECK_ENABLE
1752 /* queue check watchers, to be executed first */ 3023 /* queue check watchers, to be executed first */
1753 if (expect_false (checkcnt)) 3024 if (expect_false (checkcnt))
1754 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3025 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3026#endif
1755 3027
1756 call_pending (EV_A); 3028 EV_INVOKE_PENDING;
1757 } 3029 }
1758 while (expect_true ( 3030 while (expect_true (
1759 activecnt 3031 activecnt
1760 && !loop_done 3032 && !loop_done
1761 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3033 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1762 )); 3034 ));
1763 3035
1764 if (loop_done == EVUNLOOP_ONE) 3036 if (loop_done == EVBREAK_ONE)
1765 loop_done = EVUNLOOP_CANCEL; 3037 loop_done = EVBREAK_CANCEL;
3038
3039#if EV_FEATURE_API
3040 --loop_depth;
3041#endif
1766} 3042}
1767 3043
1768void 3044void
1769ev_unloop (EV_P_ int how) 3045ev_break (EV_P_ int how)
1770{ 3046{
1771 loop_done = how; 3047 loop_done = how;
1772} 3048}
1773 3049
3050void
3051ev_ref (EV_P)
3052{
3053 ++activecnt;
3054}
3055
3056void
3057ev_unref (EV_P)
3058{
3059 --activecnt;
3060}
3061
3062void
3063ev_now_update (EV_P)
3064{
3065 time_update (EV_A_ 1e100);
3066}
3067
3068void
3069ev_suspend (EV_P)
3070{
3071 ev_now_update (EV_A);
3072}
3073
3074void
3075ev_resume (EV_P)
3076{
3077 ev_tstamp mn_prev = mn_now;
3078
3079 ev_now_update (EV_A);
3080 timers_reschedule (EV_A_ mn_now - mn_prev);
3081#if EV_PERIODIC_ENABLE
3082 /* TODO: really do this? */
3083 periodics_reschedule (EV_A);
3084#endif
3085}
3086
1774/*****************************************************************************/ 3087/*****************************************************************************/
3088/* singly-linked list management, used when the expected list length is short */
1775 3089
1776void inline_size 3090inline_size void
1777wlist_add (WL *head, WL elem) 3091wlist_add (WL *head, WL elem)
1778{ 3092{
1779 elem->next = *head; 3093 elem->next = *head;
1780 *head = elem; 3094 *head = elem;
1781} 3095}
1782 3096
1783void inline_size 3097inline_size void
1784wlist_del (WL *head, WL elem) 3098wlist_del (WL *head, WL elem)
1785{ 3099{
1786 while (*head) 3100 while (*head)
1787 { 3101 {
1788 if (*head == elem) 3102 if (expect_true (*head == elem))
1789 { 3103 {
1790 *head = elem->next; 3104 *head = elem->next;
1791 return; 3105 break;
1792 } 3106 }
1793 3107
1794 head = &(*head)->next; 3108 head = &(*head)->next;
1795 } 3109 }
1796} 3110}
1797 3111
1798void inline_speed 3112/* internal, faster, version of ev_clear_pending */
3113inline_speed void
1799clear_pending (EV_P_ W w) 3114clear_pending (EV_P_ W w)
1800{ 3115{
1801 if (w->pending) 3116 if (w->pending)
1802 { 3117 {
1803 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3118 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1804 w->pending = 0; 3119 w->pending = 0;
1805 } 3120 }
1806} 3121}
1807 3122
1808int 3123int
… …
1812 int pending = w_->pending; 3127 int pending = w_->pending;
1813 3128
1814 if (expect_true (pending)) 3129 if (expect_true (pending))
1815 { 3130 {
1816 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3131 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3132 p->w = (W)&pending_w;
1817 w_->pending = 0; 3133 w_->pending = 0;
1818 p->w = 0;
1819 return p->events; 3134 return p->events;
1820 } 3135 }
1821 else 3136 else
1822 return 0; 3137 return 0;
1823} 3138}
1824 3139
1825void inline_size 3140inline_size void
1826pri_adjust (EV_P_ W w) 3141pri_adjust (EV_P_ W w)
1827{ 3142{
1828 int pri = w->priority; 3143 int pri = ev_priority (w);
1829 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3144 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1830 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3145 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1831 w->priority = pri; 3146 ev_set_priority (w, pri);
1832} 3147}
1833 3148
1834void inline_speed 3149inline_speed void
1835ev_start (EV_P_ W w, int active) 3150ev_start (EV_P_ W w, int active)
1836{ 3151{
1837 pri_adjust (EV_A_ w); 3152 pri_adjust (EV_A_ w);
1838 w->active = active; 3153 w->active = active;
1839 ev_ref (EV_A); 3154 ev_ref (EV_A);
1840} 3155}
1841 3156
1842void inline_size 3157inline_size void
1843ev_stop (EV_P_ W w) 3158ev_stop (EV_P_ W w)
1844{ 3159{
1845 ev_unref (EV_A); 3160 ev_unref (EV_A);
1846 w->active = 0; 3161 w->active = 0;
1847} 3162}
… …
1854 int fd = w->fd; 3169 int fd = w->fd;
1855 3170
1856 if (expect_false (ev_is_active (w))) 3171 if (expect_false (ev_is_active (w)))
1857 return; 3172 return;
1858 3173
1859 assert (("ev_io_start called with negative fd", fd >= 0)); 3174 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3175 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3176
3177 EV_FREQUENT_CHECK;
1860 3178
1861 ev_start (EV_A_ (W)w, 1); 3179 ev_start (EV_A_ (W)w, 1);
1862 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3180 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1863 wlist_add (&anfds[fd].head, (WL)w); 3181 wlist_add (&anfds[fd].head, (WL)w);
1864 3182
1865 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3183 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1866 w->events &= ~EV_IOFDSET; 3184 w->events &= ~EV__IOFDSET;
3185
3186 EV_FREQUENT_CHECK;
1867} 3187}
1868 3188
1869void noinline 3189void noinline
1870ev_io_stop (EV_P_ ev_io *w) 3190ev_io_stop (EV_P_ ev_io *w)
1871{ 3191{
1872 clear_pending (EV_A_ (W)w); 3192 clear_pending (EV_A_ (W)w);
1873 if (expect_false (!ev_is_active (w))) 3193 if (expect_false (!ev_is_active (w)))
1874 return; 3194 return;
1875 3195
1876 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3196 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3197
3198 EV_FREQUENT_CHECK;
1877 3199
1878 wlist_del (&anfds[w->fd].head, (WL)w); 3200 wlist_del (&anfds[w->fd].head, (WL)w);
1879 ev_stop (EV_A_ (W)w); 3201 ev_stop (EV_A_ (W)w);
1880 3202
1881 fd_change (EV_A_ w->fd, 1); 3203 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3204
3205 EV_FREQUENT_CHECK;
1882} 3206}
1883 3207
1884void noinline 3208void noinline
1885ev_timer_start (EV_P_ ev_timer *w) 3209ev_timer_start (EV_P_ ev_timer *w)
1886{ 3210{
1887 if (expect_false (ev_is_active (w))) 3211 if (expect_false (ev_is_active (w)))
1888 return; 3212 return;
1889 3213
1890 ev_at (w) += mn_now; 3214 ev_at (w) += mn_now;
1891 3215
1892 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3216 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1893 3217
3218 EV_FREQUENT_CHECK;
3219
3220 ++timercnt;
1894 ev_start (EV_A_ (W)w, ++timercnt); 3221 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1895 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2); 3222 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1896 timers [timercnt] = (WT)w; 3223 ANHE_w (timers [ev_active (w)]) = (WT)w;
3224 ANHE_at_cache (timers [ev_active (w)]);
1897 upheap (timers, timercnt); 3225 upheap (timers, ev_active (w));
1898 3226
3227 EV_FREQUENT_CHECK;
3228
1899 /*assert (("internal timer heap corruption", timers [((W)w)->active] == w));*/ 3229 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1900} 3230}
1901 3231
1902void noinline 3232void noinline
1903ev_timer_stop (EV_P_ ev_timer *w) 3233ev_timer_stop (EV_P_ ev_timer *w)
1904{ 3234{
1905 clear_pending (EV_A_ (W)w); 3235 clear_pending (EV_A_ (W)w);
1906 if (expect_false (!ev_is_active (w))) 3236 if (expect_false (!ev_is_active (w)))
1907 return; 3237 return;
1908 3238
1909 assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w)); 3239 EV_FREQUENT_CHECK;
1910 3240
1911 { 3241 {
1912 int active = ((W)w)->active; 3242 int active = ev_active (w);
1913 3243
3244 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3245
3246 --timercnt;
3247
1914 if (expect_true (active < timercnt)) 3248 if (expect_true (active < timercnt + HEAP0))
1915 { 3249 {
1916 timers [active] = timers [timercnt]; 3250 timers [active] = timers [timercnt + HEAP0];
1917 adjustheap (timers, timercnt, active); 3251 adjustheap (timers, timercnt, active);
1918 } 3252 }
1919
1920 --timercnt;
1921 } 3253 }
1922 3254
1923 ev_at (w) -= mn_now; 3255 ev_at (w) -= mn_now;
1924 3256
1925 ev_stop (EV_A_ (W)w); 3257 ev_stop (EV_A_ (W)w);
3258
3259 EV_FREQUENT_CHECK;
1926} 3260}
1927 3261
1928void noinline 3262void noinline
1929ev_timer_again (EV_P_ ev_timer *w) 3263ev_timer_again (EV_P_ ev_timer *w)
1930{ 3264{
3265 EV_FREQUENT_CHECK;
3266
1931 if (ev_is_active (w)) 3267 if (ev_is_active (w))
1932 { 3268 {
1933 if (w->repeat) 3269 if (w->repeat)
1934 { 3270 {
1935 ev_at (w) = mn_now + w->repeat; 3271 ev_at (w) = mn_now + w->repeat;
3272 ANHE_at_cache (timers [ev_active (w)]);
1936 adjustheap (timers, timercnt, ((W)w)->active); 3273 adjustheap (timers, timercnt, ev_active (w));
1937 } 3274 }
1938 else 3275 else
1939 ev_timer_stop (EV_A_ w); 3276 ev_timer_stop (EV_A_ w);
1940 } 3277 }
1941 else if (w->repeat) 3278 else if (w->repeat)
1942 { 3279 {
1943 w->at = w->repeat; 3280 ev_at (w) = w->repeat;
1944 ev_timer_start (EV_A_ w); 3281 ev_timer_start (EV_A_ w);
1945 } 3282 }
3283
3284 EV_FREQUENT_CHECK;
3285}
3286
3287ev_tstamp
3288ev_timer_remaining (EV_P_ ev_timer *w)
3289{
3290 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1946} 3291}
1947 3292
1948#if EV_PERIODIC_ENABLE 3293#if EV_PERIODIC_ENABLE
1949void noinline 3294void noinline
1950ev_periodic_start (EV_P_ ev_periodic *w) 3295ev_periodic_start (EV_P_ ev_periodic *w)
… …
1954 3299
1955 if (w->reschedule_cb) 3300 if (w->reschedule_cb)
1956 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3301 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1957 else if (w->interval) 3302 else if (w->interval)
1958 { 3303 {
1959 assert (("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.));
1960 /* this formula differs from the one in periodic_reify because we do not always round up */ 3305 periodic_recalc (EV_A_ w);
1961 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1962 } 3306 }
1963 else 3307 else
1964 ev_at (w) = w->offset; 3308 ev_at (w) = w->offset;
1965 3309
3310 EV_FREQUENT_CHECK;
3311
3312 ++periodiccnt;
1966 ev_start (EV_A_ (W)w, ++periodiccnt); 3313 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1967 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2); 3314 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1968 periodics [periodiccnt] = (WT)w; 3315 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1969 upheap (periodics, periodiccnt); 3316 ANHE_at_cache (periodics [ev_active (w)]);
3317 upheap (periodics, ev_active (w));
1970 3318
3319 EV_FREQUENT_CHECK;
3320
1971 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3321 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1972} 3322}
1973 3323
1974void noinline 3324void noinline
1975ev_periodic_stop (EV_P_ ev_periodic *w) 3325ev_periodic_stop (EV_P_ ev_periodic *w)
1976{ 3326{
1977 clear_pending (EV_A_ (W)w); 3327 clear_pending (EV_A_ (W)w);
1978 if (expect_false (!ev_is_active (w))) 3328 if (expect_false (!ev_is_active (w)))
1979 return; 3329 return;
1980 3330
1981 assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w)); 3331 EV_FREQUENT_CHECK;
1982 3332
1983 { 3333 {
1984 int active = ((W)w)->active; 3334 int active = ev_active (w);
1985 3335
3336 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3337
3338 --periodiccnt;
3339
1986 if (expect_true (active < periodiccnt)) 3340 if (expect_true (active < periodiccnt + HEAP0))
1987 { 3341 {
1988 periodics [active] = periodics [periodiccnt]; 3342 periodics [active] = periodics [periodiccnt + HEAP0];
1989 adjustheap (periodics, periodiccnt, active); 3343 adjustheap (periodics, periodiccnt, active);
1990 } 3344 }
1991
1992 --periodiccnt;
1993 } 3345 }
1994 3346
1995 ev_stop (EV_A_ (W)w); 3347 ev_stop (EV_A_ (W)w);
3348
3349 EV_FREQUENT_CHECK;
1996} 3350}
1997 3351
1998void noinline 3352void noinline
1999ev_periodic_again (EV_P_ ev_periodic *w) 3353ev_periodic_again (EV_P_ ev_periodic *w)
2000{ 3354{
… …
2006 3360
2007#ifndef SA_RESTART 3361#ifndef SA_RESTART
2008# define SA_RESTART 0 3362# define SA_RESTART 0
2009#endif 3363#endif
2010 3364
3365#if EV_SIGNAL_ENABLE
3366
2011void noinline 3367void noinline
2012ev_signal_start (EV_P_ ev_signal *w) 3368ev_signal_start (EV_P_ ev_signal *w)
2013{ 3369{
2014#if EV_MULTIPLICITY
2015 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2016#endif
2017 if (expect_false (ev_is_active (w))) 3370 if (expect_false (ev_is_active (w)))
2018 return; 3371 return;
2019 3372
2020 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3373 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2021 3374
2022 evpipe_init (EV_A); 3375#if EV_MULTIPLICITY
3376 assert (("libev: a signal must not be attached to two different loops",
3377 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2023 3378
3379 signals [w->signum - 1].loop = EV_A;
3380#endif
3381
3382 EV_FREQUENT_CHECK;
3383
3384#if EV_USE_SIGNALFD
3385 if (sigfd == -2)
2024 { 3386 {
2025#ifndef _WIN32 3387 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2026 sigset_t full, prev; 3388 if (sigfd < 0 && errno == EINVAL)
2027 sigfillset (&full); 3389 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2028 sigprocmask (SIG_SETMASK, &full, &prev);
2029#endif
2030 3390
2031 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3391 if (sigfd >= 0)
3392 {
3393 fd_intern (sigfd); /* doing it twice will not hurt */
2032 3394
2033#ifndef _WIN32 3395 sigemptyset (&sigfd_set);
2034 sigprocmask (SIG_SETMASK, &prev, 0); 3396
2035#endif 3397 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3398 ev_set_priority (&sigfd_w, EV_MAXPRI);
3399 ev_io_start (EV_A_ &sigfd_w);
3400 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3401 }
2036 } 3402 }
3403
3404 if (sigfd >= 0)
3405 {
3406 /* TODO: check .head */
3407 sigaddset (&sigfd_set, w->signum);
3408 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3409
3410 signalfd (sigfd, &sigfd_set, 0);
3411 }
3412#endif
2037 3413
2038 ev_start (EV_A_ (W)w, 1); 3414 ev_start (EV_A_ (W)w, 1);
2039 wlist_add (&signals [w->signum - 1].head, (WL)w); 3415 wlist_add (&signals [w->signum - 1].head, (WL)w);
2040 3416
2041 if (!((WL)w)->next) 3417 if (!((WL)w)->next)
3418# if EV_USE_SIGNALFD
3419 if (sigfd < 0) /*TODO*/
3420# endif
2042 { 3421 {
2043#if _WIN32 3422# ifdef _WIN32
3423 evpipe_init (EV_A);
3424
2044 signal (w->signum, ev_sighandler); 3425 signal (w->signum, ev_sighandler);
2045#else 3426# else
2046 struct sigaction sa; 3427 struct sigaction sa;
3428
3429 evpipe_init (EV_A);
3430
2047 sa.sa_handler = ev_sighandler; 3431 sa.sa_handler = ev_sighandler;
2048 sigfillset (&sa.sa_mask); 3432 sigfillset (&sa.sa_mask);
2049 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 */
2050 sigaction (w->signum, &sa, 0); 3434 sigaction (w->signum, &sa, 0);
3435
3436 if (origflags & EVFLAG_NOSIGMASK)
3437 {
3438 sigemptyset (&sa.sa_mask);
3439 sigaddset (&sa.sa_mask, w->signum);
3440 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3441 }
2051#endif 3442#endif
2052 } 3443 }
3444
3445 EV_FREQUENT_CHECK;
2053} 3446}
2054 3447
2055void noinline 3448void noinline
2056ev_signal_stop (EV_P_ ev_signal *w) 3449ev_signal_stop (EV_P_ ev_signal *w)
2057{ 3450{
2058 clear_pending (EV_A_ (W)w); 3451 clear_pending (EV_A_ (W)w);
2059 if (expect_false (!ev_is_active (w))) 3452 if (expect_false (!ev_is_active (w)))
2060 return; 3453 return;
2061 3454
3455 EV_FREQUENT_CHECK;
3456
2062 wlist_del (&signals [w->signum - 1].head, (WL)w); 3457 wlist_del (&signals [w->signum - 1].head, (WL)w);
2063 ev_stop (EV_A_ (W)w); 3458 ev_stop (EV_A_ (W)w);
2064 3459
2065 if (!signals [w->signum - 1].head) 3460 if (!signals [w->signum - 1].head)
3461 {
3462#if EV_MULTIPLICITY
3463 signals [w->signum - 1].loop = 0; /* unattach from signal */
3464#endif
3465#if EV_USE_SIGNALFD
3466 if (sigfd >= 0)
3467 {
3468 sigset_t ss;
3469
3470 sigemptyset (&ss);
3471 sigaddset (&ss, w->signum);
3472 sigdelset (&sigfd_set, w->signum);
3473
3474 signalfd (sigfd, &sigfd_set, 0);
3475 sigprocmask (SIG_UNBLOCK, &ss, 0);
3476 }
3477 else
3478#endif
2066 signal (w->signum, SIG_DFL); 3479 signal (w->signum, SIG_DFL);
3480 }
3481
3482 EV_FREQUENT_CHECK;
2067} 3483}
3484
3485#endif
3486
3487#if EV_CHILD_ENABLE
2068 3488
2069void 3489void
2070ev_child_start (EV_P_ ev_child *w) 3490ev_child_start (EV_P_ ev_child *w)
2071{ 3491{
2072#if EV_MULTIPLICITY 3492#if EV_MULTIPLICITY
2073 assert (("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));
2074#endif 3494#endif
2075 if (expect_false (ev_is_active (w))) 3495 if (expect_false (ev_is_active (w)))
2076 return; 3496 return;
2077 3497
3498 EV_FREQUENT_CHECK;
3499
2078 ev_start (EV_A_ (W)w, 1); 3500 ev_start (EV_A_ (W)w, 1);
2079 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3501 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3502
3503 EV_FREQUENT_CHECK;
2080} 3504}
2081 3505
2082void 3506void
2083ev_child_stop (EV_P_ ev_child *w) 3507ev_child_stop (EV_P_ ev_child *w)
2084{ 3508{
2085 clear_pending (EV_A_ (W)w); 3509 clear_pending (EV_A_ (W)w);
2086 if (expect_false (!ev_is_active (w))) 3510 if (expect_false (!ev_is_active (w)))
2087 return; 3511 return;
2088 3512
3513 EV_FREQUENT_CHECK;
3514
2089 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3515 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2090 ev_stop (EV_A_ (W)w); 3516 ev_stop (EV_A_ (W)w);
3517
3518 EV_FREQUENT_CHECK;
2091} 3519}
3520
3521#endif
2092 3522
2093#if EV_STAT_ENABLE 3523#if EV_STAT_ENABLE
2094 3524
2095# ifdef _WIN32 3525# ifdef _WIN32
2096# undef lstat 3526# undef lstat
2097# define lstat(a,b) _stati64 (a,b) 3527# define lstat(a,b) _stati64 (a,b)
2098# endif 3528# endif
2099 3529
2100#define DEF_STAT_INTERVAL 5.0074891 3530#define DEF_STAT_INTERVAL 5.0074891
3531#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2101#define MIN_STAT_INTERVAL 0.1074891 3532#define MIN_STAT_INTERVAL 0.1074891
2102 3533
2103static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3534static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2104 3535
2105#if EV_USE_INOTIFY 3536#if EV_USE_INOTIFY
2106# define EV_INOTIFY_BUFSIZE 8192 3537
3538/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3539# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2107 3540
2108static void noinline 3541static void noinline
2109infy_add (EV_P_ ev_stat *w) 3542infy_add (EV_P_ ev_stat *w)
2110{ 3543{
2111 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 3544 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2112 3545
2113 if (w->wd < 0) 3546 if (w->wd >= 0)
3547 {
3548 struct statfs sfs;
3549
3550 /* now local changes will be tracked by inotify, but remote changes won't */
3551 /* unless the filesystem is known to be local, we therefore still poll */
3552 /* also do poll on <2.6.25, but with normal frequency */
3553
3554 if (!fs_2625)
3555 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3556 else if (!statfs (w->path, &sfs)
3557 && (sfs.f_type == 0x1373 /* devfs */
3558 || sfs.f_type == 0xEF53 /* ext2/3 */
3559 || sfs.f_type == 0x3153464a /* jfs */
3560 || sfs.f_type == 0x52654973 /* reiser3 */
3561 || sfs.f_type == 0x01021994 /* tempfs */
3562 || sfs.f_type == 0x58465342 /* xfs */))
3563 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3564 else
3565 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2114 { 3566 }
2115 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3567 else
3568 {
3569 /* can't use inotify, continue to stat */
3570 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2116 3571
2117 /* monitor some parent directory for speedup hints */ 3572 /* if path is not there, monitor some parent directory for speedup hints */
3573 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3574 /* but an efficiency issue only */
2118 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3575 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2119 { 3576 {
2120 char path [4096]; 3577 char path [4096];
2121 strcpy (path, w->path); 3578 strcpy (path, w->path);
2122 3579
… …
2125 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3582 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2126 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3583 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2127 3584
2128 char *pend = strrchr (path, '/'); 3585 char *pend = strrchr (path, '/');
2129 3586
2130 if (!pend) 3587 if (!pend || pend == path)
2131 break; /* whoops, no '/', complain to your admin */ 3588 break;
2132 3589
2133 *pend = 0; 3590 *pend = 0;
2134 w->wd = inotify_add_watch (fs_fd, path, mask); 3591 w->wd = inotify_add_watch (fs_fd, path, mask);
2135 } 3592 }
2136 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3593 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2137 } 3594 }
2138 } 3595 }
2139 else
2140 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2141 3596
2142 if (w->wd >= 0) 3597 if (w->wd >= 0)
2143 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);
3599
3600 /* now re-arm timer, if required */
3601 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3602 ev_timer_again (EV_A_ &w->timer);
3603 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2144} 3604}
2145 3605
2146static void noinline 3606static void noinline
2147infy_del (EV_P_ ev_stat *w) 3607infy_del (EV_P_ ev_stat *w)
2148{ 3608{
… …
2151 3611
2152 if (wd < 0) 3612 if (wd < 0)
2153 return; 3613 return;
2154 3614
2155 w->wd = -2; 3615 w->wd = -2;
2156 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3616 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2157 wlist_del (&fs_hash [slot].head, (WL)w); 3617 wlist_del (&fs_hash [slot].head, (WL)w);
2158 3618
2159 /* remove this watcher, if others are watching it, they will rearm */ 3619 /* remove this watcher, if others are watching it, they will rearm */
2160 inotify_rm_watch (fs_fd, wd); 3620 inotify_rm_watch (fs_fd, wd);
2161} 3621}
2162 3622
2163static void noinline 3623static void noinline
2164infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3624infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2165{ 3625{
2166 if (slot < 0) 3626 if (slot < 0)
2167 /* overflow, need to check for all hahs slots */ 3627 /* overflow, need to check for all hash slots */
2168 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3628 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2169 infy_wd (EV_A_ slot, wd, ev); 3629 infy_wd (EV_A_ slot, wd, ev);
2170 else 3630 else
2171 { 3631 {
2172 WL w_; 3632 WL w_;
2173 3633
2174 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3634 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2175 { 3635 {
2176 ev_stat *w = (ev_stat *)w_; 3636 ev_stat *w = (ev_stat *)w_;
2177 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 */
2178 3638
2179 if (w->wd == wd || wd == -1) 3639 if (w->wd == wd || wd == -1)
2180 { 3640 {
2181 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3641 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2182 { 3642 {
3643 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2183 w->wd = -1; 3644 w->wd = -1;
2184 infy_add (EV_A_ w); /* re-add, no matter what */ 3645 infy_add (EV_A_ w); /* re-add, no matter what */
2185 } 3646 }
2186 3647
2187 stat_timer_cb (EV_A_ &w->timer, 0); 3648 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2192 3653
2193static void 3654static void
2194infy_cb (EV_P_ ev_io *w, int revents) 3655infy_cb (EV_P_ ev_io *w, int revents)
2195{ 3656{
2196 char buf [EV_INOTIFY_BUFSIZE]; 3657 char buf [EV_INOTIFY_BUFSIZE];
2197 struct inotify_event *ev = (struct inotify_event *)buf;
2198 int ofs; 3658 int ofs;
2199 int len = read (fs_fd, buf, sizeof (buf)); 3659 int len = read (fs_fd, buf, sizeof (buf));
2200 3660
2201 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3661 for (ofs = 0; ofs < len; )
3662 {
3663 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2202 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3664 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3665 ofs += sizeof (struct inotify_event) + ev->len;
3666 }
2203} 3667}
2204 3668
2205void inline_size 3669inline_size void ecb_cold
3670ev_check_2625 (EV_P)
3671{
3672 /* kernels < 2.6.25 are borked
3673 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3674 */
3675 if (ev_linux_version () < 0x020619)
3676 return;
3677
3678 fs_2625 = 1;
3679}
3680
3681inline_size int
3682infy_newfd (void)
3683{
3684#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3685 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3686 if (fd >= 0)
3687 return fd;
3688#endif
3689 return inotify_init ();
3690}
3691
3692inline_size void
2206infy_init (EV_P) 3693infy_init (EV_P)
2207{ 3694{
2208 if (fs_fd != -2) 3695 if (fs_fd != -2)
2209 return; 3696 return;
2210 3697
3698 fs_fd = -1;
3699
3700 ev_check_2625 (EV_A);
3701
2211 fs_fd = inotify_init (); 3702 fs_fd = infy_newfd ();
2212 3703
2213 if (fs_fd >= 0) 3704 if (fs_fd >= 0)
2214 { 3705 {
3706 fd_intern (fs_fd);
2215 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3707 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2216 ev_set_priority (&fs_w, EV_MAXPRI); 3708 ev_set_priority (&fs_w, EV_MAXPRI);
2217 ev_io_start (EV_A_ &fs_w); 3709 ev_io_start (EV_A_ &fs_w);
3710 ev_unref (EV_A);
2218 } 3711 }
2219} 3712}
2220 3713
2221void inline_size 3714inline_size void
2222infy_fork (EV_P) 3715infy_fork (EV_P)
2223{ 3716{
2224 int slot; 3717 int slot;
2225 3718
2226 if (fs_fd < 0) 3719 if (fs_fd < 0)
2227 return; 3720 return;
2228 3721
3722 ev_ref (EV_A);
3723 ev_io_stop (EV_A_ &fs_w);
2229 close (fs_fd); 3724 close (fs_fd);
2230 fs_fd = inotify_init (); 3725 fs_fd = infy_newfd ();
2231 3726
3727 if (fs_fd >= 0)
3728 {
3729 fd_intern (fs_fd);
3730 ev_io_set (&fs_w, fs_fd, EV_READ);
3731 ev_io_start (EV_A_ &fs_w);
3732 ev_unref (EV_A);
3733 }
3734
2232 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3735 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2233 { 3736 {
2234 WL w_ = fs_hash [slot].head; 3737 WL w_ = fs_hash [slot].head;
2235 fs_hash [slot].head = 0; 3738 fs_hash [slot].head = 0;
2236 3739
2237 while (w_) 3740 while (w_)
… …
2242 w->wd = -1; 3745 w->wd = -1;
2243 3746
2244 if (fs_fd >= 0) 3747 if (fs_fd >= 0)
2245 infy_add (EV_A_ w); /* re-add, no matter what */ 3748 infy_add (EV_A_ w); /* re-add, no matter what */
2246 else 3749 else
3750 {
3751 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3752 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2247 ev_timer_start (EV_A_ &w->timer); 3753 ev_timer_again (EV_A_ &w->timer);
3754 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3755 }
2248 } 3756 }
2249
2250 } 3757 }
2251} 3758}
2252 3759
3760#endif
3761
3762#ifdef _WIN32
3763# define EV_LSTAT(p,b) _stati64 (p, b)
3764#else
3765# define EV_LSTAT(p,b) lstat (p, b)
2253#endif 3766#endif
2254 3767
2255void 3768void
2256ev_stat_stat (EV_P_ ev_stat *w) 3769ev_stat_stat (EV_P_ ev_stat *w)
2257{ 3770{
… …
2264static void noinline 3777static void noinline
2265stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3778stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2266{ 3779{
2267 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3780 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2268 3781
2269 /* we copy this here each the time so that */ 3782 ev_statdata prev = w->attr;
2270 /* prev has the old value when the callback gets invoked */
2271 w->prev = w->attr;
2272 ev_stat_stat (EV_A_ w); 3783 ev_stat_stat (EV_A_ w);
2273 3784
2274 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3785 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2275 if ( 3786 if (
2276 w->prev.st_dev != w->attr.st_dev 3787 prev.st_dev != w->attr.st_dev
2277 || w->prev.st_ino != w->attr.st_ino 3788 || prev.st_ino != w->attr.st_ino
2278 || w->prev.st_mode != w->attr.st_mode 3789 || prev.st_mode != w->attr.st_mode
2279 || w->prev.st_nlink != w->attr.st_nlink 3790 || prev.st_nlink != w->attr.st_nlink
2280 || w->prev.st_uid != w->attr.st_uid 3791 || prev.st_uid != w->attr.st_uid
2281 || w->prev.st_gid != w->attr.st_gid 3792 || prev.st_gid != w->attr.st_gid
2282 || w->prev.st_rdev != w->attr.st_rdev 3793 || prev.st_rdev != w->attr.st_rdev
2283 || w->prev.st_size != w->attr.st_size 3794 || prev.st_size != w->attr.st_size
2284 || w->prev.st_atime != w->attr.st_atime 3795 || prev.st_atime != w->attr.st_atime
2285 || w->prev.st_mtime != w->attr.st_mtime 3796 || prev.st_mtime != w->attr.st_mtime
2286 || w->prev.st_ctime != w->attr.st_ctime 3797 || prev.st_ctime != w->attr.st_ctime
2287 ) { 3798 ) {
3799 /* we only update w->prev on actual differences */
3800 /* in case we test more often than invoke the callback, */
3801 /* to ensure that prev is always different to attr */
3802 w->prev = prev;
3803
2288 #if EV_USE_INOTIFY 3804 #if EV_USE_INOTIFY
3805 if (fs_fd >= 0)
3806 {
2289 infy_del (EV_A_ w); 3807 infy_del (EV_A_ w);
2290 infy_add (EV_A_ w); 3808 infy_add (EV_A_ w);
2291 ev_stat_stat (EV_A_ w); /* avoid race... */ 3809 ev_stat_stat (EV_A_ w); /* avoid race... */
3810 }
2292 #endif 3811 #endif
2293 3812
2294 ev_feed_event (EV_A_ w, EV_STAT); 3813 ev_feed_event (EV_A_ w, EV_STAT);
2295 } 3814 }
2296} 3815}
… …
2299ev_stat_start (EV_P_ ev_stat *w) 3818ev_stat_start (EV_P_ ev_stat *w)
2300{ 3819{
2301 if (expect_false (ev_is_active (w))) 3820 if (expect_false (ev_is_active (w)))
2302 return; 3821 return;
2303 3822
2304 /* since we use memcmp, we need to clear any padding data etc. */
2305 memset (&w->prev, 0, sizeof (ev_statdata));
2306 memset (&w->attr, 0, sizeof (ev_statdata));
2307
2308 ev_stat_stat (EV_A_ w); 3823 ev_stat_stat (EV_A_ w);
2309 3824
3825 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2310 if (w->interval < MIN_STAT_INTERVAL) 3826 w->interval = MIN_STAT_INTERVAL;
2311 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2312 3827
2313 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3828 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2314 ev_set_priority (&w->timer, ev_priority (w)); 3829 ev_set_priority (&w->timer, ev_priority (w));
2315 3830
2316#if EV_USE_INOTIFY 3831#if EV_USE_INOTIFY
2317 infy_init (EV_A); 3832 infy_init (EV_A);
2318 3833
2319 if (fs_fd >= 0) 3834 if (fs_fd >= 0)
2320 infy_add (EV_A_ w); 3835 infy_add (EV_A_ w);
2321 else 3836 else
2322#endif 3837#endif
3838 {
2323 ev_timer_start (EV_A_ &w->timer); 3839 ev_timer_again (EV_A_ &w->timer);
3840 ev_unref (EV_A);
3841 }
2324 3842
2325 ev_start (EV_A_ (W)w, 1); 3843 ev_start (EV_A_ (W)w, 1);
3844
3845 EV_FREQUENT_CHECK;
2326} 3846}
2327 3847
2328void 3848void
2329ev_stat_stop (EV_P_ ev_stat *w) 3849ev_stat_stop (EV_P_ ev_stat *w)
2330{ 3850{
2331 clear_pending (EV_A_ (W)w); 3851 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w))) 3852 if (expect_false (!ev_is_active (w)))
2333 return; 3853 return;
2334 3854
3855 EV_FREQUENT_CHECK;
3856
2335#if EV_USE_INOTIFY 3857#if EV_USE_INOTIFY
2336 infy_del (EV_A_ w); 3858 infy_del (EV_A_ w);
2337#endif 3859#endif
3860
3861 if (ev_is_active (&w->timer))
3862 {
3863 ev_ref (EV_A);
2338 ev_timer_stop (EV_A_ &w->timer); 3864 ev_timer_stop (EV_A_ &w->timer);
3865 }
2339 3866
2340 ev_stop (EV_A_ (W)w); 3867 ev_stop (EV_A_ (W)w);
3868
3869 EV_FREQUENT_CHECK;
2341} 3870}
2342#endif 3871#endif
2343 3872
2344#if EV_IDLE_ENABLE 3873#if EV_IDLE_ENABLE
2345void 3874void
… …
2348 if (expect_false (ev_is_active (w))) 3877 if (expect_false (ev_is_active (w)))
2349 return; 3878 return;
2350 3879
2351 pri_adjust (EV_A_ (W)w); 3880 pri_adjust (EV_A_ (W)w);
2352 3881
3882 EV_FREQUENT_CHECK;
3883
2353 { 3884 {
2354 int active = ++idlecnt [ABSPRI (w)]; 3885 int active = ++idlecnt [ABSPRI (w)];
2355 3886
2356 ++idleall; 3887 ++idleall;
2357 ev_start (EV_A_ (W)w, active); 3888 ev_start (EV_A_ (W)w, active);
2358 3889
2359 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3890 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2360 idles [ABSPRI (w)][active - 1] = w; 3891 idles [ABSPRI (w)][active - 1] = w;
2361 } 3892 }
3893
3894 EV_FREQUENT_CHECK;
2362} 3895}
2363 3896
2364void 3897void
2365ev_idle_stop (EV_P_ ev_idle *w) 3898ev_idle_stop (EV_P_ ev_idle *w)
2366{ 3899{
2367 clear_pending (EV_A_ (W)w); 3900 clear_pending (EV_A_ (W)w);
2368 if (expect_false (!ev_is_active (w))) 3901 if (expect_false (!ev_is_active (w)))
2369 return; 3902 return;
2370 3903
3904 EV_FREQUENT_CHECK;
3905
2371 { 3906 {
2372 int active = ((W)w)->active; 3907 int active = ev_active (w);
2373 3908
2374 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3909 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2375 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3910 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2376 3911
2377 ev_stop (EV_A_ (W)w); 3912 ev_stop (EV_A_ (W)w);
2378 --idleall; 3913 --idleall;
2379 } 3914 }
2380}
2381#endif
2382 3915
3916 EV_FREQUENT_CHECK;
3917}
3918#endif
3919
3920#if EV_PREPARE_ENABLE
2383void 3921void
2384ev_prepare_start (EV_P_ ev_prepare *w) 3922ev_prepare_start (EV_P_ ev_prepare *w)
2385{ 3923{
2386 if (expect_false (ev_is_active (w))) 3924 if (expect_false (ev_is_active (w)))
2387 return; 3925 return;
3926
3927 EV_FREQUENT_CHECK;
2388 3928
2389 ev_start (EV_A_ (W)w, ++preparecnt); 3929 ev_start (EV_A_ (W)w, ++preparecnt);
2390 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3930 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2391 prepares [preparecnt - 1] = w; 3931 prepares [preparecnt - 1] = w;
3932
3933 EV_FREQUENT_CHECK;
2392} 3934}
2393 3935
2394void 3936void
2395ev_prepare_stop (EV_P_ ev_prepare *w) 3937ev_prepare_stop (EV_P_ ev_prepare *w)
2396{ 3938{
2397 clear_pending (EV_A_ (W)w); 3939 clear_pending (EV_A_ (W)w);
2398 if (expect_false (!ev_is_active (w))) 3940 if (expect_false (!ev_is_active (w)))
2399 return; 3941 return;
2400 3942
3943 EV_FREQUENT_CHECK;
3944
2401 { 3945 {
2402 int active = ((W)w)->active; 3946 int active = ev_active (w);
3947
2403 prepares [active - 1] = prepares [--preparecnt]; 3948 prepares [active - 1] = prepares [--preparecnt];
2404 ((W)prepares [active - 1])->active = active; 3949 ev_active (prepares [active - 1]) = active;
2405 } 3950 }
2406 3951
2407 ev_stop (EV_A_ (W)w); 3952 ev_stop (EV_A_ (W)w);
2408}
2409 3953
3954 EV_FREQUENT_CHECK;
3955}
3956#endif
3957
3958#if EV_CHECK_ENABLE
2410void 3959void
2411ev_check_start (EV_P_ ev_check *w) 3960ev_check_start (EV_P_ ev_check *w)
2412{ 3961{
2413 if (expect_false (ev_is_active (w))) 3962 if (expect_false (ev_is_active (w)))
2414 return; 3963 return;
3964
3965 EV_FREQUENT_CHECK;
2415 3966
2416 ev_start (EV_A_ (W)w, ++checkcnt); 3967 ev_start (EV_A_ (W)w, ++checkcnt);
2417 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3968 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2418 checks [checkcnt - 1] = w; 3969 checks [checkcnt - 1] = w;
3970
3971 EV_FREQUENT_CHECK;
2419} 3972}
2420 3973
2421void 3974void
2422ev_check_stop (EV_P_ ev_check *w) 3975ev_check_stop (EV_P_ ev_check *w)
2423{ 3976{
2424 clear_pending (EV_A_ (W)w); 3977 clear_pending (EV_A_ (W)w);
2425 if (expect_false (!ev_is_active (w))) 3978 if (expect_false (!ev_is_active (w)))
2426 return; 3979 return;
2427 3980
3981 EV_FREQUENT_CHECK;
3982
2428 { 3983 {
2429 int active = ((W)w)->active; 3984 int active = ev_active (w);
3985
2430 checks [active - 1] = checks [--checkcnt]; 3986 checks [active - 1] = checks [--checkcnt];
2431 ((W)checks [active - 1])->active = active; 3987 ev_active (checks [active - 1]) = active;
2432 } 3988 }
2433 3989
2434 ev_stop (EV_A_ (W)w); 3990 ev_stop (EV_A_ (W)w);
3991
3992 EV_FREQUENT_CHECK;
2435} 3993}
3994#endif
2436 3995
2437#if EV_EMBED_ENABLE 3996#if EV_EMBED_ENABLE
2438void noinline 3997void noinline
2439ev_embed_sweep (EV_P_ ev_embed *w) 3998ev_embed_sweep (EV_P_ ev_embed *w)
2440{ 3999{
2441 ev_loop (w->other, EVLOOP_NONBLOCK); 4000 ev_run (w->other, EVRUN_NOWAIT);
2442} 4001}
2443 4002
2444static void 4003static void
2445embed_io_cb (EV_P_ ev_io *io, int revents) 4004embed_io_cb (EV_P_ ev_io *io, int revents)
2446{ 4005{
2447 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4006 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2448 4007
2449 if (ev_cb (w)) 4008 if (ev_cb (w))
2450 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4009 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2451 else 4010 else
2452 ev_loop (w->other, EVLOOP_NONBLOCK); 4011 ev_run (w->other, EVRUN_NOWAIT);
2453} 4012}
2454 4013
2455static void 4014static void
2456embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4015embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2457{ 4016{
2458 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4017 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2459 4018
2460 { 4019 {
2461 struct ev_loop *loop = w->other; 4020 EV_P = w->other;
2462 4021
2463 while (fdchangecnt) 4022 while (fdchangecnt)
2464 { 4023 {
2465 fd_reify (EV_A); 4024 fd_reify (EV_A);
2466 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4025 ev_run (EV_A_ EVRUN_NOWAIT);
2467 } 4026 }
2468 } 4027 }
4028}
4029
4030static void
4031embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4032{
4033 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4034
4035 ev_embed_stop (EV_A_ w);
4036
4037 {
4038 EV_P = w->other;
4039
4040 ev_loop_fork (EV_A);
4041 ev_run (EV_A_ EVRUN_NOWAIT);
4042 }
4043
4044 ev_embed_start (EV_A_ w);
2469} 4045}
2470 4046
2471#if 0 4047#if 0
2472static void 4048static void
2473embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4049embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2481{ 4057{
2482 if (expect_false (ev_is_active (w))) 4058 if (expect_false (ev_is_active (w)))
2483 return; 4059 return;
2484 4060
2485 { 4061 {
2486 struct ev_loop *loop = w->other; 4062 EV_P = w->other;
2487 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4063 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2488 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4064 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2489 } 4065 }
4066
4067 EV_FREQUENT_CHECK;
2490 4068
2491 ev_set_priority (&w->io, ev_priority (w)); 4069 ev_set_priority (&w->io, ev_priority (w));
2492 ev_io_start (EV_A_ &w->io); 4070 ev_io_start (EV_A_ &w->io);
2493 4071
2494 ev_prepare_init (&w->prepare, embed_prepare_cb); 4072 ev_prepare_init (&w->prepare, embed_prepare_cb);
2495 ev_set_priority (&w->prepare, EV_MINPRI); 4073 ev_set_priority (&w->prepare, EV_MINPRI);
2496 ev_prepare_start (EV_A_ &w->prepare); 4074 ev_prepare_start (EV_A_ &w->prepare);
2497 4075
4076 ev_fork_init (&w->fork, embed_fork_cb);
4077 ev_fork_start (EV_A_ &w->fork);
4078
2498 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4079 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2499 4080
2500 ev_start (EV_A_ (W)w, 1); 4081 ev_start (EV_A_ (W)w, 1);
4082
4083 EV_FREQUENT_CHECK;
2501} 4084}
2502 4085
2503void 4086void
2504ev_embed_stop (EV_P_ ev_embed *w) 4087ev_embed_stop (EV_P_ ev_embed *w)
2505{ 4088{
2506 clear_pending (EV_A_ (W)w); 4089 clear_pending (EV_A_ (W)w);
2507 if (expect_false (!ev_is_active (w))) 4090 if (expect_false (!ev_is_active (w)))
2508 return; 4091 return;
2509 4092
4093 EV_FREQUENT_CHECK;
4094
2510 ev_io_stop (EV_A_ &w->io); 4095 ev_io_stop (EV_A_ &w->io);
2511 ev_prepare_stop (EV_A_ &w->prepare); 4096 ev_prepare_stop (EV_A_ &w->prepare);
4097 ev_fork_stop (EV_A_ &w->fork);
2512 4098
2513 ev_stop (EV_A_ (W)w); 4099 ev_stop (EV_A_ (W)w);
4100
4101 EV_FREQUENT_CHECK;
2514} 4102}
2515#endif 4103#endif
2516 4104
2517#if EV_FORK_ENABLE 4105#if EV_FORK_ENABLE
2518void 4106void
2519ev_fork_start (EV_P_ ev_fork *w) 4107ev_fork_start (EV_P_ ev_fork *w)
2520{ 4108{
2521 if (expect_false (ev_is_active (w))) 4109 if (expect_false (ev_is_active (w)))
2522 return; 4110 return;
2523 4111
4112 EV_FREQUENT_CHECK;
4113
2524 ev_start (EV_A_ (W)w, ++forkcnt); 4114 ev_start (EV_A_ (W)w, ++forkcnt);
2525 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4115 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2526 forks [forkcnt - 1] = w; 4116 forks [forkcnt - 1] = w;
4117
4118 EV_FREQUENT_CHECK;
2527} 4119}
2528 4120
2529void 4121void
2530ev_fork_stop (EV_P_ ev_fork *w) 4122ev_fork_stop (EV_P_ ev_fork *w)
2531{ 4123{
2532 clear_pending (EV_A_ (W)w); 4124 clear_pending (EV_A_ (W)w);
2533 if (expect_false (!ev_is_active (w))) 4125 if (expect_false (!ev_is_active (w)))
2534 return; 4126 return;
2535 4127
4128 EV_FREQUENT_CHECK;
4129
2536 { 4130 {
2537 int active = ((W)w)->active; 4131 int active = ev_active (w);
4132
2538 forks [active - 1] = forks [--forkcnt]; 4133 forks [active - 1] = forks [--forkcnt];
2539 ((W)forks [active - 1])->active = active; 4134 ev_active (forks [active - 1]) = active;
2540 } 4135 }
2541 4136
2542 ev_stop (EV_A_ (W)w); 4137 ev_stop (EV_A_ (W)w);
4138
4139 EV_FREQUENT_CHECK;
4140}
4141#endif
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;
2543} 4181}
2544#endif 4182#endif
2545 4183
2546#if EV_ASYNC_ENABLE 4184#if EV_ASYNC_ENABLE
2547void 4185void
2548ev_async_start (EV_P_ ev_async *w) 4186ev_async_start (EV_P_ ev_async *w)
2549{ 4187{
2550 if (expect_false (ev_is_active (w))) 4188 if (expect_false (ev_is_active (w)))
2551 return; 4189 return;
2552 4190
4191 w->sent = 0;
4192
2553 evpipe_init (EV_A); 4193 evpipe_init (EV_A);
4194
4195 EV_FREQUENT_CHECK;
2554 4196
2555 ev_start (EV_A_ (W)w, ++asynccnt); 4197 ev_start (EV_A_ (W)w, ++asynccnt);
2556 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4198 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2557 asyncs [asynccnt - 1] = w; 4199 asyncs [asynccnt - 1] = w;
4200
4201 EV_FREQUENT_CHECK;
2558} 4202}
2559 4203
2560void 4204void
2561ev_async_stop (EV_P_ ev_async *w) 4205ev_async_stop (EV_P_ ev_async *w)
2562{ 4206{
2563 clear_pending (EV_A_ (W)w); 4207 clear_pending (EV_A_ (W)w);
2564 if (expect_false (!ev_is_active (w))) 4208 if (expect_false (!ev_is_active (w)))
2565 return; 4209 return;
2566 4210
4211 EV_FREQUENT_CHECK;
4212
2567 { 4213 {
2568 int active = ((W)w)->active; 4214 int active = ev_active (w);
4215
2569 asyncs [active - 1] = asyncs [--asynccnt]; 4216 asyncs [active - 1] = asyncs [--asynccnt];
2570 ((W)asyncs [active - 1])->active = active; 4217 ev_active (asyncs [active - 1]) = active;
2571 } 4218 }
2572 4219
2573 ev_stop (EV_A_ (W)w); 4220 ev_stop (EV_A_ (W)w);
4221
4222 EV_FREQUENT_CHECK;
2574} 4223}
2575 4224
2576void 4225void
2577ev_async_send (EV_P_ ev_async *w) 4226ev_async_send (EV_P_ ev_async *w)
2578{ 4227{
2579 w->sent = 1; 4228 w->sent = 1;
2580 evpipe_write (EV_A_ &gotasync); 4229 evpipe_write (EV_A_ &async_pending);
2581} 4230}
2582#endif 4231#endif
2583 4232
2584/*****************************************************************************/ 4233/*****************************************************************************/
2585 4234
… …
2595once_cb (EV_P_ struct ev_once *once, int revents) 4244once_cb (EV_P_ struct ev_once *once, int revents)
2596{ 4245{
2597 void (*cb)(int revents, void *arg) = once->cb; 4246 void (*cb)(int revents, void *arg) = once->cb;
2598 void *arg = once->arg; 4247 void *arg = once->arg;
2599 4248
2600 ev_io_stop (EV_A_ &once->io); 4249 ev_io_stop (EV_A_ &once->io);
2601 ev_timer_stop (EV_A_ &once->to); 4250 ev_timer_stop (EV_A_ &once->to);
2602 ev_free (once); 4251 ev_free (once);
2603 4252
2604 cb (revents, arg); 4253 cb (revents, arg);
2605} 4254}
2606 4255
2607static void 4256static void
2608once_cb_io (EV_P_ ev_io *w, int revents) 4257once_cb_io (EV_P_ ev_io *w, int revents)
2609{ 4258{
2610 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4259 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4260
4261 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2611} 4262}
2612 4263
2613static void 4264static void
2614once_cb_to (EV_P_ ev_timer *w, int revents) 4265once_cb_to (EV_P_ ev_timer *w, int revents)
2615{ 4266{
2616 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4267 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4268
4269 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2617} 4270}
2618 4271
2619void 4272void
2620ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4273ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2621{ 4274{
2622 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));
2623 4276
2624 if (expect_false (!once)) 4277 if (expect_false (!once))
2625 { 4278 {
2626 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4279 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2627 return; 4280 return;
2628 } 4281 }
2629 4282
2630 once->cb = cb; 4283 once->cb = cb;
2631 once->arg = arg; 4284 once->arg = arg;
… …
2643 ev_timer_set (&once->to, timeout, 0.); 4296 ev_timer_set (&once->to, timeout, 0.);
2644 ev_timer_start (EV_A_ &once->to); 4297 ev_timer_start (EV_A_ &once->to);
2645 } 4298 }
2646} 4299}
2647 4300
4301/*****************************************************************************/
4302
4303#if EV_WALK_ENABLE
4304void ecb_cold
4305ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4306{
4307 int i, j;
4308 ev_watcher_list *wl, *wn;
4309
4310 if (types & (EV_IO | EV_EMBED))
4311 for (i = 0; i < anfdmax; ++i)
4312 for (wl = anfds [i].head; wl; )
4313 {
4314 wn = wl->next;
4315
4316#if EV_EMBED_ENABLE
4317 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4318 {
4319 if (types & EV_EMBED)
4320 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4321 }
4322 else
4323#endif
4324#if EV_USE_INOTIFY
4325 if (ev_cb ((ev_io *)wl) == infy_cb)
4326 ;
4327 else
4328#endif
4329 if ((ev_io *)wl != &pipe_w)
4330 if (types & EV_IO)
4331 cb (EV_A_ EV_IO, wl);
4332
4333 wl = wn;
4334 }
4335
4336 if (types & (EV_TIMER | EV_STAT))
4337 for (i = timercnt + HEAP0; i-- > HEAP0; )
4338#if EV_STAT_ENABLE
4339 /*TODO: timer is not always active*/
4340 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4341 {
4342 if (types & EV_STAT)
4343 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4344 }
4345 else
4346#endif
4347 if (types & EV_TIMER)
4348 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4349
4350#if EV_PERIODIC_ENABLE
4351 if (types & EV_PERIODIC)
4352 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4353 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4354#endif
4355
4356#if EV_IDLE_ENABLE
4357 if (types & EV_IDLE)
4358 for (j = NUMPRI; j--; )
4359 for (i = idlecnt [j]; i--; )
4360 cb (EV_A_ EV_IDLE, idles [j][i]);
4361#endif
4362
4363#if EV_FORK_ENABLE
4364 if (types & EV_FORK)
4365 for (i = forkcnt; i--; )
4366 if (ev_cb (forks [i]) != embed_fork_cb)
4367 cb (EV_A_ EV_FORK, forks [i]);
4368#endif
4369
4370#if EV_ASYNC_ENABLE
4371 if (types & EV_ASYNC)
4372 for (i = asynccnt; i--; )
4373 cb (EV_A_ EV_ASYNC, asyncs [i]);
4374#endif
4375
4376#if EV_PREPARE_ENABLE
4377 if (types & EV_PREPARE)
4378 for (i = preparecnt; i--; )
4379# if EV_EMBED_ENABLE
4380 if (ev_cb (prepares [i]) != embed_prepare_cb)
4381# endif
4382 cb (EV_A_ EV_PREPARE, prepares [i]);
4383#endif
4384
4385#if EV_CHECK_ENABLE
4386 if (types & EV_CHECK)
4387 for (i = checkcnt; i--; )
4388 cb (EV_A_ EV_CHECK, checks [i]);
4389#endif
4390
4391#if EV_SIGNAL_ENABLE
4392 if (types & EV_SIGNAL)
4393 for (i = 0; i < EV_NSIG - 1; ++i)
4394 for (wl = signals [i].head; wl; )
4395 {
4396 wn = wl->next;
4397 cb (EV_A_ EV_SIGNAL, wl);
4398 wl = wn;
4399 }
4400#endif
4401
4402#if EV_CHILD_ENABLE
4403 if (types & EV_CHILD)
4404 for (i = (EV_PID_HASHSIZE); i--; )
4405 for (wl = childs [i]; wl; )
4406 {
4407 wn = wl->next;
4408 cb (EV_A_ EV_CHILD, wl);
4409 wl = wn;
4410 }
4411#endif
4412/* EV_STAT 0x00001000 /* stat data changed */
4413/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4414}
4415#endif
4416
2648#if EV_MULTIPLICITY 4417#if EV_MULTIPLICITY
2649 #include "ev_wrap.h" 4418 #include "ev_wrap.h"
2650#endif 4419#endif
2651 4420
2652#ifdef __cplusplus 4421EV_CPP(})
2653}
2654#endif
2655 4422

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