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Comparing libev/ev.c (file contents):
Revision 1.201 by root, Thu Dec 27 08:00:18 2007 UTC vs.
Revision 1.424 by root, Tue May 1 22:01:40 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 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 40/* this big block deduces configuration from config.h */
41extern "C" {
42#endif
43
44#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
45# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
46# include EV_CONFIG_H 43# include EV_CONFIG_H
47# else 44# else
48# include "config.h" 45# include "config.h"
49# endif 46# endif
50 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
51# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
52# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
53# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
54# endif 71# endif
55# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
57# endif 74# endif
58# else 75# else
59# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
60# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
61# endif 78# endif
62# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
63# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
64# endif 81# endif
65# endif 82# endif
66 83
84# if HAVE_NANOSLEEP
67# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
68# if HAVE_NANOSLEEP
69# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
70# else 88# else
89# undef EV_USE_NANOSLEEP
71# 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
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
73# endif 100# endif
74 101
102# if HAVE_POLL && HAVE_POLL_H
75# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
76# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
77# define EV_USE_SELECT 1
78# else
79# define EV_USE_SELECT 0
80# endif 105# endif
81# endif
82
83# ifndef EV_USE_POLL
84# if HAVE_POLL && HAVE_POLL_H
85# define EV_USE_POLL 1
86# else 106# else
107# undef EV_USE_POLL
87# define EV_USE_POLL 0 108# define EV_USE_POLL 0
88# endif
89# endif 109# endif
90 110
91# ifndef EV_USE_EPOLL
92# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
94# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
95# define EV_USE_EPOLL 0
96# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
97# endif 118# endif
98 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
99# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
100# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
101# define EV_USE_KQUEUE 1
102# else
103# define EV_USE_KQUEUE 0
104# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
105# endif 127# endif
106 128
107# ifndef EV_USE_PORT
108# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
109# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
110# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
111# define EV_USE_PORT 0
112# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
113# endif 136# endif
114 137
115# ifndef EV_USE_INOTIFY
116# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
117# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
118# else
119# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
120# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
121# endif 145# endif
122 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
123#endif 154# endif
124 155
125#include <math.h> 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
163# endif
164
165#endif
166
126#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
127#include <fcntl.h> 169#include <fcntl.h>
128#include <stddef.h> 170#include <stddef.h>
129 171
130#include <stdio.h> 172#include <stdio.h>
131 173
132#include <assert.h> 174#include <assert.h>
133#include <errno.h> 175#include <errno.h>
134#include <sys/types.h> 176#include <sys/types.h>
135#include <time.h> 177#include <time.h>
178#include <limits.h>
136 179
137#include <signal.h> 180#include <signal.h>
138 181
139#ifdef EV_H 182#ifdef EV_H
140# include EV_H 183# include EV_H
141#else 184#else
142# include "ev.h" 185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
143#endif 197#endif
144 198
145#ifndef _WIN32 199#ifndef _WIN32
146# include <sys/time.h> 200# include <sys/time.h>
147# include <sys/wait.h> 201# include <sys/wait.h>
148# include <unistd.h> 202# include <unistd.h>
149#else 203#else
204# include <io.h>
150# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
151# include <windows.h> 206# include <windows.h>
152# ifndef EV_SELECT_IS_WINSOCKET 207# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1 208# define EV_SELECT_IS_WINSOCKET 1
154# endif 209# endif
210# undef EV_AVOID_STDIO
211#endif
212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
220
221/* this block tries to deduce configuration from header-defined symbols and defaults */
222
223/* try to deduce the maximum number of signals on this platform */
224#if defined EV_NSIG
225/* use what's provided */
226#elif defined NSIG
227# define EV_NSIG (NSIG)
228#elif defined _NSIG
229# define EV_NSIG (_NSIG)
230#elif defined SIGMAX
231# define EV_NSIG (SIGMAX+1)
232#elif defined SIG_MAX
233# define EV_NSIG (SIG_MAX+1)
234#elif defined _SIG_MAX
235# define EV_NSIG (_SIG_MAX+1)
236#elif defined MAXSIG
237# define EV_NSIG (MAXSIG+1)
238#elif defined MAX_SIG
239# define EV_NSIG (MAX_SIG+1)
240#elif defined SIGARRAYSIZE
241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
242#elif defined _sys_nsig
243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
244#else
245# error "unable to find value for NSIG, please report"
246/* to make it compile regardless, just remove the above line, */
247/* but consider reporting it, too! :) */
248# define EV_NSIG 65
249#endif
250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
255#ifndef EV_USE_CLOCK_SYSCALL
256# if __linux && __GLIBC__ >= 2
257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
258# else
259# define EV_USE_CLOCK_SYSCALL 0
155#endif 260# endif
156 261#endif
157/**/
158 262
159#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
264# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
265# define EV_USE_MONOTONIC EV_FEATURE_OS
266# else
160# define EV_USE_MONOTONIC 0 267# define EV_USE_MONOTONIC 0
268# endif
161#endif 269#endif
162 270
163#ifndef EV_USE_REALTIME 271#ifndef EV_USE_REALTIME
164# define EV_USE_REALTIME 0 272# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
165#endif 273#endif
166 274
167#ifndef EV_USE_NANOSLEEP 275#ifndef EV_USE_NANOSLEEP
276# if _POSIX_C_SOURCE >= 199309L
277# define EV_USE_NANOSLEEP EV_FEATURE_OS
278# else
168# define EV_USE_NANOSLEEP 0 279# define EV_USE_NANOSLEEP 0
280# endif
169#endif 281#endif
170 282
171#ifndef EV_USE_SELECT 283#ifndef EV_USE_SELECT
172# define EV_USE_SELECT 1 284# define EV_USE_SELECT EV_FEATURE_BACKENDS
173#endif 285#endif
174 286
175#ifndef EV_USE_POLL 287#ifndef EV_USE_POLL
176# ifdef _WIN32 288# ifdef _WIN32
177# define EV_USE_POLL 0 289# define EV_USE_POLL 0
178# else 290# else
179# define EV_USE_POLL 1 291# define EV_USE_POLL EV_FEATURE_BACKENDS
180# endif 292# endif
181#endif 293#endif
182 294
183#ifndef EV_USE_EPOLL 295#ifndef EV_USE_EPOLL
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_EPOLL EV_FEATURE_BACKENDS
298# else
184# define EV_USE_EPOLL 0 299# define EV_USE_EPOLL 0
300# endif
185#endif 301#endif
186 302
187#ifndef EV_USE_KQUEUE 303#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0 304# define EV_USE_KQUEUE 0
189#endif 305#endif
… …
191#ifndef EV_USE_PORT 307#ifndef EV_USE_PORT
192# define EV_USE_PORT 0 308# define EV_USE_PORT 0
193#endif 309#endif
194 310
195#ifndef EV_USE_INOTIFY 311#ifndef EV_USE_INOTIFY
312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
313# define EV_USE_INOTIFY EV_FEATURE_OS
314# else
196# define EV_USE_INOTIFY 0 315# define EV_USE_INOTIFY 0
316# endif
197#endif 317#endif
198 318
199#ifndef EV_PID_HASHSIZE 319#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL 320# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
201# define EV_PID_HASHSIZE 1 321#endif
322
323#ifndef EV_INOTIFY_HASHSIZE
324# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
325#endif
326
327#ifndef EV_USE_EVENTFD
328# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
329# define EV_USE_EVENTFD EV_FEATURE_OS
202# else 330# else
203# define EV_PID_HASHSIZE 16 331# define EV_USE_EVENTFD 0
204# endif 332# endif
205#endif 333#endif
206 334
207#ifndef EV_INOTIFY_HASHSIZE 335#ifndef EV_USE_SIGNALFD
208# if EV_MINIMAL 336# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
209# define EV_INOTIFY_HASHSIZE 1 337# define EV_USE_SIGNALFD EV_FEATURE_OS
210# else 338# else
211# define EV_INOTIFY_HASHSIZE 16 339# define EV_USE_SIGNALFD 0
212# endif 340# endif
213#endif 341#endif
214 342
215/**/ 343#if 0 /* debugging */
344# define EV_VERIFY 3
345# define EV_USE_4HEAP 1
346# define EV_HEAP_CACHE_AT 1
347#endif
348
349#ifndef EV_VERIFY
350# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
351#endif
352
353#ifndef EV_USE_4HEAP
354# define EV_USE_4HEAP EV_FEATURE_DATA
355#endif
356
357#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
359#endif
360
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL
364# include <sys/syscall.h>
365# ifdef SYS_clock_gettime
366# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
367# undef EV_USE_MONOTONIC
368# define EV_USE_MONOTONIC 1
369# else
370# undef EV_USE_CLOCK_SYSCALL
371# define EV_USE_CLOCK_SYSCALL 0
372# endif
373#endif
374
375/* this block fixes any misconfiguration where we know we run into trouble otherwise */
376
377#ifdef _AIX
378/* AIX has a completely broken poll.h header */
379# undef EV_USE_POLL
380# define EV_USE_POLL 0
381#endif
216 382
217#ifndef CLOCK_MONOTONIC 383#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0 385# define EV_USE_MONOTONIC 0
220#endif 386#endif
… …
228# undef EV_USE_INOTIFY 394# undef EV_USE_INOTIFY
229# define EV_USE_INOTIFY 0 395# define EV_USE_INOTIFY 0
230#endif 396#endif
231 397
232#if !EV_USE_NANOSLEEP 398#if !EV_USE_NANOSLEEP
233# ifndef _WIN32 399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined _WIN32 && !defined __hpux
234# include <sys/select.h> 401# include <sys/select.h>
235# endif 402# endif
236#endif 403#endif
237 404
238#if EV_USE_INOTIFY 405#if EV_USE_INOTIFY
406# include <sys/statfs.h>
239# include <sys/inotify.h> 407# include <sys/inotify.h>
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0
412# endif
240#endif 413#endif
241 414
242#if EV_SELECT_IS_WINSOCKET 415#if EV_SELECT_IS_WINSOCKET
243# include <winsock.h> 416# include <winsock.h>
244#endif 417#endif
245 418
419#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h>
422# ifndef EFD_NONBLOCK
423# define EFD_NONBLOCK O_NONBLOCK
424# endif
425# ifndef EFD_CLOEXEC
426# ifdef O_CLOEXEC
427# define EFD_CLOEXEC O_CLOEXEC
428# else
429# define EFD_CLOEXEC 02000000
430# endif
431# endif
432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
433#endif
434
435#if EV_USE_SIGNALFD
436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
437# include <stdint.h>
438# ifndef SFD_NONBLOCK
439# define SFD_NONBLOCK O_NONBLOCK
440# endif
441# ifndef SFD_CLOEXEC
442# ifdef O_CLOEXEC
443# define SFD_CLOEXEC O_CLOEXEC
444# else
445# define SFD_CLOEXEC 02000000
446# endif
447# endif
448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
449
450struct signalfd_siginfo
451{
452 uint32_t ssi_signo;
453 char pad[128 - sizeof (uint32_t)];
454};
455#endif
456
246/**/ 457/**/
247 458
459#if EV_VERIFY >= 3
460# define EV_FREQUENT_CHECK ev_verify (EV_A)
461#else
462# define EV_FREQUENT_CHECK do { } while (0)
463#endif
464
248/* 465/*
249 * This is used to avoid floating point rounding problems. 466 * This is used to work around floating point rounding problems.
250 * It is added to ev_rt_now when scheduling periodics
251 * to ensure progress, time-wise, even when rounding
252 * errors are against us.
253 * This value is good at least till the year 4000. 467 * This value is good at least till the year 4000.
254 * Better solutions welcome.
255 */ 468 */
256#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
257 471
258#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
259#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
260/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
261 474
475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477
478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
479/* ECB.H BEGIN */
480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
508
509#ifndef ECB_H
510#define ECB_H
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
262#if __GNUC__ >= 4 519 #if __GNUC__
263# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
264# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
265#else 526#else
266# define expect(expr,value) (expr) 527 #include <inttypes.h>
267# define noinline
268# if __STDC_VERSION__ < 199901L
269# define inline
270# endif 528#endif
529
530/* many compilers define _GNUC_ to some versions but then only implement
531 * what their idiot authors think are the "more important" extensions,
532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
271#endif 542 #endif
543#endif
272 544
545/*****************************************************************************/
546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
586 #endif
587 #endif
588#endif
589
590#ifndef ECB_MEMORY_FENCE
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
600 #elif defined _WIN32
601 #include <WinNT.h>
602 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
603 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
604 #include <mbarrier.h>
605 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
606 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
607 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
608 #elif __xlC__
609 #define ECB_MEMORY_FENCE __sync ()
610 #endif
611#endif
612
613#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS
615 /*
616 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler
619 * OR provide pthread.h and link against the posix thread library
620 * of your system.
621 */
622 #include <pthread.h>
623 #define ECB_NEEDS_PTHREADS 1
624 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
625
626 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
627 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
628 #endif
629#endif
630
631#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
632 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
633#endif
634
635#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif
638
639/*****************************************************************************/
640
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus
644 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__
647#elif ECB_C99
648 #define ecb_inline static inline
649#else
650 #define ecb_inline static
651#endif
652
653#if ECB_GCC_VERSION(3,3)
654 #define ecb_restrict __restrict__
655#elif ECB_C99
656 #define ecb_restrict restrict
657#else
658 #define ecb_restrict
659#endif
660
661typedef int ecb_bool;
662
663#define ECB_CONCAT_(a, b) a ## b
664#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
665#define ECB_STRINGIFY_(a) # a
666#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
667
668#define ecb_function_ ecb_inline
669
670#if ECB_GCC_VERSION(3,1)
671 #define ecb_attribute(attrlist) __attribute__(attrlist)
672 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else
676 #define ecb_attribute(attrlist)
677 #define ecb_is_constant(expr) 0
678 #define ecb_expect(expr,value) (expr)
679 #define ecb_prefetch(addr,rw,locality)
680#endif
681
682/* no emulation for ecb_decltype */
683#if ECB_GCC_VERSION(4,5)
684 #define ecb_decltype(x) __decltype(x)
685#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x)
687#endif
688
689#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__))
694
695#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__))
699#else
700 #define ecb_artificial
701 #define ecb_hot
702 #define ecb_cold
703#endif
704
705/* put around conditional expressions if you are very sure that the */
706/* expression is mostly true or mostly false. note that these return */
707/* booleans, not the expression. */
273#define expect_false(expr) expect ((expr) != 0, 0) 708#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
274#define expect_true(expr) expect ((expr) != 0, 1) 709#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
710/* for compatibility to the rest of the world */
711#define ecb_likely(expr) ecb_expect_true (expr)
712#define ecb_unlikely(expr) ecb_expect_false (expr)
713
714/* count trailing zero bits and count # of one bits */
715#if ECB_GCC_VERSION(3,4)
716 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
717 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
718 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
719 #define ecb_ctz32(x) __builtin_ctz (x)
720 #define ecb_ctz64(x) __builtin_ctzll (x)
721 #define ecb_popcount32(x) __builtin_popcount (x)
722 /* no popcountll */
723#else
724 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz32 (uint32_t x)
727 {
728 int r = 0;
729
730 x &= ~x + 1; /* this isolates the lowest bit */
731
732#if ECB_branchless_on_i386
733 r += !!(x & 0xaaaaaaaa) << 0;
734 r += !!(x & 0xcccccccc) << 1;
735 r += !!(x & 0xf0f0f0f0) << 2;
736 r += !!(x & 0xff00ff00) << 3;
737 r += !!(x & 0xffff0000) << 4;
738#else
739 if (x & 0xaaaaaaaa) r += 1;
740 if (x & 0xcccccccc) r += 2;
741 if (x & 0xf0f0f0f0) r += 4;
742 if (x & 0xff00ff00) r += 8;
743 if (x & 0xffff0000) r += 16;
744#endif
745
746 return r;
747 }
748
749 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
750 ecb_function_ int
751 ecb_ctz64 (uint64_t x)
752 {
753 int shift = x & 0xffffffffU ? 0 : 32;
754 return ecb_ctz32 (x >> shift) + shift;
755 }
756
757 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
758 ecb_function_ int
759 ecb_popcount32 (uint32_t x)
760 {
761 x -= (x >> 1) & 0x55555555;
762 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
763 x = ((x >> 4) + x) & 0x0f0f0f0f;
764 x *= 0x01010101;
765
766 return x >> 24;
767 }
768
769 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
770 ecb_function_ int ecb_ld32 (uint32_t x)
771 {
772 int r = 0;
773
774 if (x >> 16) { x >>= 16; r += 16; }
775 if (x >> 8) { x >>= 8; r += 8; }
776 if (x >> 4) { x >>= 4; r += 4; }
777 if (x >> 2) { x >>= 2; r += 2; }
778 if (x >> 1) { r += 1; }
779
780 return r;
781 }
782
783 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
784 ecb_function_ int ecb_ld64 (uint64_t x)
785 {
786 int r = 0;
787
788 if (x >> 32) { x >>= 32; r += 32; }
789
790 return r + ecb_ld32 (x);
791 }
792#endif
793
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{
797 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
799}
800
801ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
803{
804 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
805 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
806 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
807 x = ( x >> 8 ) | ( x << 8);
808
809 return x;
810}
811
812ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
814{
815 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
816 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
817 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
818 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
819 x = ( x >> 16 ) | ( x << 16);
820
821 return x;
822}
823
824/* popcount64 is only available on 64 bit cpus as gcc builtin */
825/* so for this version we are lazy */
826ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
827ecb_function_ int
828ecb_popcount64 (uint64_t x)
829{
830 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
831}
832
833ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
834ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
841
842ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
843ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
844ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
845ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
846ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
847ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
848ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
849ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
850
851#if ECB_GCC_VERSION(4,3)
852 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
853 #define ecb_bswap32(x) __builtin_bswap32 (x)
854 #define ecb_bswap64(x) __builtin_bswap64 (x)
855#else
856 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
857 ecb_function_ uint16_t
858 ecb_bswap16 (uint16_t x)
859 {
860 return ecb_rotl16 (x, 8);
861 }
862
863 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
864 ecb_function_ uint32_t
865 ecb_bswap32 (uint32_t x)
866 {
867 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
868 }
869
870 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
871 ecb_function_ uint64_t
872 ecb_bswap64 (uint64_t x)
873 {
874 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
875 }
876#endif
877
878#if ECB_GCC_VERSION(4,5)
879 #define ecb_unreachable() __builtin_unreachable ()
880#else
881 /* this seems to work fine, but gcc always emits a warning for it :/ */
882 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { }
884#endif
885
886/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
888
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char
891ecb_byteorder_helper (void)
892{
893 const uint32_t u = 0x11223344;
894 return *(unsigned char *)&u;
895}
896
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
900ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
901
902#if ECB_GCC_VERSION(3,0) || ECB_C99
903 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
904#else
905 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
906#endif
907
908#if __cplusplus
909 template<typename T>
910 static inline T ecb_div_rd (T val, T div)
911 {
912 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
913 }
914 template<typename T>
915 static inline T ecb_div_ru (T val, T div)
916 {
917 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
918 }
919#else
920 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
921 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
922#endif
923
924#if ecb_cplusplus_does_not_suck
925 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
926 template<typename T, int N>
927 static inline int ecb_array_length (const T (&arr)[N])
928 {
929 return N;
930 }
931#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif
934
935#endif
936
937/* ECB.H END */
938
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
940/* if your architecture doesn't need memory fences, e.g. because it is
941 * single-cpu/core, or if you use libev in a project that doesn't use libev
942 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
943 * libev, in which cases the memory fences become nops.
944 * alternatively, you can remove this #error and link against libpthread,
945 * which will then provide the memory fences.
946 */
947# error "memory fences not defined for your architecture, please report"
948#endif
949
950#ifndef ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE do { } while (0)
952# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
953# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
954#endif
955
956#define expect_false(cond) ecb_expect_false (cond)
957#define expect_true(cond) ecb_expect_true (cond)
958#define noinline ecb_noinline
959
275#define inline_size static inline 960#define inline_size ecb_inline
276 961
277#if EV_MINIMAL 962#if EV_FEATURE_CODE
963# define inline_speed ecb_inline
964#else
278# define inline_speed static noinline 965# define inline_speed static noinline
966#endif
967
968#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
969
970#if EV_MINPRI == EV_MAXPRI
971# define ABSPRI(w) (((W)w), 0)
279#else 972#else
280# define inline_speed static inline
281#endif
282
283#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
284#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 973# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
974#endif
285 975
286#define EMPTY /* required for microsofts broken pseudo-c compiler */ 976#define EMPTY /* required for microsofts broken pseudo-c compiler */
287#define EMPTY2(a,b) /* used to suppress some warnings */ 977#define EMPTY2(a,b) /* used to suppress some warnings */
288 978
289typedef ev_watcher *W; 979typedef ev_watcher *W;
290typedef ev_watcher_list *WL; 980typedef ev_watcher_list *WL;
291typedef ev_watcher_time *WT; 981typedef ev_watcher_time *WT;
292 982
983#define ev_active(w) ((W)(w))->active
984#define ev_at(w) ((WT)(w))->at
985
986#if EV_USE_REALTIME
987/* sig_atomic_t is used to avoid per-thread variables or locking but still */
988/* giving it a reasonably high chance of working on typical architectures */
989static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
990#endif
991
293#if EV_USE_MONOTONIC 992#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */
296static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 993static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
994#endif
995
996#ifndef EV_FD_TO_WIN32_HANDLE
997# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
998#endif
999#ifndef EV_WIN32_HANDLE_TO_FD
1000# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1001#endif
1002#ifndef EV_WIN32_CLOSE_FD
1003# define EV_WIN32_CLOSE_FD(fd) close (fd)
297#endif 1004#endif
298 1005
299#ifdef _WIN32 1006#ifdef _WIN32
300# include "ev_win32.c" 1007# include "ev_win32.c"
301#endif 1008#endif
302 1009
303/*****************************************************************************/ 1010/*****************************************************************************/
304 1011
1012/* define a suitable floor function (only used by periodics atm) */
1013
1014#if EV_USE_FLOOR
1015# include <math.h>
1016# define ev_floor(v) floor (v)
1017#else
1018
1019#include <float.h>
1020
1021/* a floor() replacement function, should be independent of ev_tstamp type */
1022static ev_tstamp noinline
1023ev_floor (ev_tstamp v)
1024{
1025 /* the choice of shift factor is not terribly important */
1026#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1028#else
1029 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1030#endif
1031
1032 /* argument too large for an unsigned long? */
1033 if (expect_false (v >= shift))
1034 {
1035 ev_tstamp f;
1036
1037 if (v == v - 1.)
1038 return v; /* very large number */
1039
1040 f = shift * ev_floor (v * (1. / shift));
1041 return f + ev_floor (v - f);
1042 }
1043
1044 /* special treatment for negative args? */
1045 if (expect_false (v < 0.))
1046 {
1047 ev_tstamp f = -ev_floor (-v);
1048
1049 return f - (f == v ? 0 : 1);
1050 }
1051
1052 /* fits into an unsigned long */
1053 return (unsigned long)v;
1054}
1055
1056#endif
1057
1058/*****************************************************************************/
1059
1060#ifdef __linux
1061# include <sys/utsname.h>
1062#endif
1063
1064static unsigned int noinline ecb_cold
1065ev_linux_version (void)
1066{
1067#ifdef __linux
1068 unsigned int v = 0;
1069 struct utsname buf;
1070 int i;
1071 char *p = buf.release;
1072
1073 if (uname (&buf))
1074 return 0;
1075
1076 for (i = 3+1; --i; )
1077 {
1078 unsigned int c = 0;
1079
1080 for (;;)
1081 {
1082 if (*p >= '0' && *p <= '9')
1083 c = c * 10 + *p++ - '0';
1084 else
1085 {
1086 p += *p == '.';
1087 break;
1088 }
1089 }
1090
1091 v = (v << 8) | c;
1092 }
1093
1094 return v;
1095#else
1096 return 0;
1097#endif
1098}
1099
1100/*****************************************************************************/
1101
1102#if EV_AVOID_STDIO
1103static void noinline ecb_cold
1104ev_printerr (const char *msg)
1105{
1106 write (STDERR_FILENO, msg, strlen (msg));
1107}
1108#endif
1109
305static void (*syserr_cb)(const char *msg); 1110static void (*syserr_cb)(const char *msg) EV_THROW;
306 1111
307void 1112void ecb_cold
308ev_set_syserr_cb (void (*cb)(const char *msg)) 1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
309{ 1114{
310 syserr_cb = cb; 1115 syserr_cb = cb;
311} 1116}
312 1117
313static void noinline 1118static void noinline ecb_cold
314syserr (const char *msg) 1119ev_syserr (const char *msg)
315{ 1120{
316 if (!msg) 1121 if (!msg)
317 msg = "(libev) system error"; 1122 msg = "(libev) system error";
318 1123
319 if (syserr_cb) 1124 if (syserr_cb)
320 syserr_cb (msg); 1125 syserr_cb (msg);
321 else 1126 else
322 { 1127 {
1128#if EV_AVOID_STDIO
1129 ev_printerr (msg);
1130 ev_printerr (": ");
1131 ev_printerr (strerror (errno));
1132 ev_printerr ("\n");
1133#else
323 perror (msg); 1134 perror (msg);
1135#endif
324 abort (); 1136 abort ();
325 } 1137 }
326} 1138}
327 1139
1140static void *
1141ev_realloc_emul (void *ptr, long size)
1142{
1143#if __GLIBC__
1144 return realloc (ptr, size);
1145#else
1146 /* some systems, notably openbsd and darwin, fail to properly
1147 * implement realloc (x, 0) (as required by both ansi c-89 and
1148 * the single unix specification, so work around them here.
1149 */
1150
1151 if (size)
1152 return realloc (ptr, size);
1153
1154 free (ptr);
1155 return 0;
1156#endif
1157}
1158
328static void *(*alloc)(void *ptr, long size); 1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
329 1160
330void 1161void ecb_cold
331ev_set_allocator (void *(*cb)(void *ptr, long size)) 1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
332{ 1163{
333 alloc = cb; 1164 alloc = cb;
334} 1165}
335 1166
336inline_speed void * 1167inline_speed void *
337ev_realloc (void *ptr, long size) 1168ev_realloc (void *ptr, long size)
338{ 1169{
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1170 ptr = alloc (ptr, size);
340 1171
341 if (!ptr && size) 1172 if (!ptr && size)
342 { 1173 {
1174#if EV_AVOID_STDIO
1175 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1176#else
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1177 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1178#endif
344 abort (); 1179 abort ();
345 } 1180 }
346 1181
347 return ptr; 1182 return ptr;
348} 1183}
… …
350#define ev_malloc(size) ev_realloc (0, (size)) 1185#define ev_malloc(size) ev_realloc (0, (size))
351#define ev_free(ptr) ev_realloc ((ptr), 0) 1186#define ev_free(ptr) ev_realloc ((ptr), 0)
352 1187
353/*****************************************************************************/ 1188/*****************************************************************************/
354 1189
1190/* set in reify when reification needed */
1191#define EV_ANFD_REIFY 1
1192
1193/* file descriptor info structure */
355typedef struct 1194typedef struct
356{ 1195{
357 WL head; 1196 WL head;
358 unsigned char events; 1197 unsigned char events; /* the events watched for */
1198 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1199 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
359 unsigned char reify; 1200 unsigned char unused;
1201#if EV_USE_EPOLL
1202 unsigned int egen; /* generation counter to counter epoll bugs */
1203#endif
360#if EV_SELECT_IS_WINSOCKET 1204#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
361 SOCKET handle; 1205 SOCKET handle;
362#endif 1206#endif
1207#if EV_USE_IOCP
1208 OVERLAPPED or, ow;
1209#endif
363} ANFD; 1210} ANFD;
364 1211
1212/* stores the pending event set for a given watcher */
365typedef struct 1213typedef struct
366{ 1214{
367 W w; 1215 W w;
368 int events; 1216 int events; /* the pending event set for the given watcher */
369} ANPENDING; 1217} ANPENDING;
370 1218
371#if EV_USE_INOTIFY 1219#if EV_USE_INOTIFY
1220/* hash table entry per inotify-id */
372typedef struct 1221typedef struct
373{ 1222{
374 WL head; 1223 WL head;
375} ANFS; 1224} ANFS;
1225#endif
1226
1227/* Heap Entry */
1228#if EV_HEAP_CACHE_AT
1229 /* a heap element */
1230 typedef struct {
1231 ev_tstamp at;
1232 WT w;
1233 } ANHE;
1234
1235 #define ANHE_w(he) (he).w /* access watcher, read-write */
1236 #define ANHE_at(he) (he).at /* access cached at, read-only */
1237 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1238#else
1239 /* a heap element */
1240 typedef WT ANHE;
1241
1242 #define ANHE_w(he) (he)
1243 #define ANHE_at(he) (he)->at
1244 #define ANHE_at_cache(he)
376#endif 1245#endif
377 1246
378#if EV_MULTIPLICITY 1247#if EV_MULTIPLICITY
379 1248
380 struct ev_loop 1249 struct ev_loop
… …
386 #undef VAR 1255 #undef VAR
387 }; 1256 };
388 #include "ev_wrap.h" 1257 #include "ev_wrap.h"
389 1258
390 static struct ev_loop default_loop_struct; 1259 static struct ev_loop default_loop_struct;
391 struct ev_loop *ev_default_loop_ptr; 1260 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
392 1261
393#else 1262#else
394 1263
395 ev_tstamp ev_rt_now; 1264 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
396 #define VAR(name,decl) static decl; 1265 #define VAR(name,decl) static decl;
397 #include "ev_vars.h" 1266 #include "ev_vars.h"
398 #undef VAR 1267 #undef VAR
399 1268
400 static int ev_default_loop_ptr; 1269 static int ev_default_loop_ptr;
401 1270
402#endif 1271#endif
403 1272
1273#if EV_FEATURE_API
1274# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1275# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1276# define EV_INVOKE_PENDING invoke_cb (EV_A)
1277#else
1278# define EV_RELEASE_CB (void)0
1279# define EV_ACQUIRE_CB (void)0
1280# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1281#endif
1282
1283#define EVBREAK_RECURSE 0x80
1284
404/*****************************************************************************/ 1285/*****************************************************************************/
405 1286
1287#ifndef EV_HAVE_EV_TIME
406ev_tstamp 1288ev_tstamp
407ev_time (void) 1289ev_time (void) EV_THROW
408{ 1290{
409#if EV_USE_REALTIME 1291#if EV_USE_REALTIME
1292 if (expect_true (have_realtime))
1293 {
410 struct timespec ts; 1294 struct timespec ts;
411 clock_gettime (CLOCK_REALTIME, &ts); 1295 clock_gettime (CLOCK_REALTIME, &ts);
412 return ts.tv_sec + ts.tv_nsec * 1e-9; 1296 return ts.tv_sec + ts.tv_nsec * 1e-9;
413#else 1297 }
1298#endif
1299
414 struct timeval tv; 1300 struct timeval tv;
415 gettimeofday (&tv, 0); 1301 gettimeofday (&tv, 0);
416 return tv.tv_sec + tv.tv_usec * 1e-6; 1302 return tv.tv_sec + tv.tv_usec * 1e-6;
417#endif
418} 1303}
1304#endif
419 1305
420ev_tstamp inline_size 1306inline_size ev_tstamp
421get_clock (void) 1307get_clock (void)
422{ 1308{
423#if EV_USE_MONOTONIC 1309#if EV_USE_MONOTONIC
424 if (expect_true (have_monotonic)) 1310 if (expect_true (have_monotonic))
425 { 1311 {
… …
432 return ev_time (); 1318 return ev_time ();
433} 1319}
434 1320
435#if EV_MULTIPLICITY 1321#if EV_MULTIPLICITY
436ev_tstamp 1322ev_tstamp
437ev_now (EV_P) 1323ev_now (EV_P) EV_THROW
438{ 1324{
439 return ev_rt_now; 1325 return ev_rt_now;
440} 1326}
441#endif 1327#endif
442 1328
443void 1329void
444ev_sleep (ev_tstamp delay) 1330ev_sleep (ev_tstamp delay) EV_THROW
445{ 1331{
446 if (delay > 0.) 1332 if (delay > 0.)
447 { 1333 {
448#if EV_USE_NANOSLEEP 1334#if EV_USE_NANOSLEEP
449 struct timespec ts; 1335 struct timespec ts;
450 1336
451 ts.tv_sec = (time_t)delay; 1337 EV_TS_SET (ts, delay);
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0); 1338 nanosleep (&ts, 0);
455#elif defined(_WIN32) 1339#elif defined _WIN32
456 Sleep (delay * 1e3); 1340 Sleep ((unsigned long)(delay * 1e3));
457#else 1341#else
458 struct timeval tv; 1342 struct timeval tv;
459 1343
460 tv.tv_sec = (time_t)delay; 1344 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1345 /* something not guaranteed by newer posix versions, but guaranteed */
462 1346 /* by older ones */
1347 EV_TV_SET (tv, delay);
463 select (0, 0, 0, 0, &tv); 1348 select (0, 0, 0, 0, &tv);
464#endif 1349#endif
465 } 1350 }
466} 1351}
467 1352
468/*****************************************************************************/ 1353/*****************************************************************************/
469 1354
470int inline_size 1355#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1356
1357/* find a suitable new size for the given array, */
1358/* hopefully by rounding to a nice-to-malloc size */
1359inline_size int
471array_nextsize (int elem, int cur, int cnt) 1360array_nextsize (int elem, int cur, int cnt)
472{ 1361{
473 int ncur = cur + 1; 1362 int ncur = cur + 1;
474 1363
475 do 1364 do
476 ncur <<= 1; 1365 ncur <<= 1;
477 while (cnt > ncur); 1366 while (cnt > ncur);
478 1367
479 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1368 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
480 if (elem * ncur > 4096) 1369 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
481 { 1370 {
482 ncur *= elem; 1371 ncur *= elem;
483 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1372 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
484 ncur = ncur - sizeof (void *) * 4; 1373 ncur = ncur - sizeof (void *) * 4;
485 ncur /= elem; 1374 ncur /= elem;
486 } 1375 }
487 1376
488 return ncur; 1377 return ncur;
489} 1378}
490 1379
491static noinline void * 1380static void * noinline ecb_cold
492array_realloc (int elem, void *base, int *cur, int cnt) 1381array_realloc (int elem, void *base, int *cur, int cnt)
493{ 1382{
494 *cur = array_nextsize (elem, *cur, cnt); 1383 *cur = array_nextsize (elem, *cur, cnt);
495 return ev_realloc (base, elem * *cur); 1384 return ev_realloc (base, elem * *cur);
496} 1385}
1386
1387#define array_init_zero(base,count) \
1388 memset ((void *)(base), 0, sizeof (*(base)) * (count))
497 1389
498#define array_needsize(type,base,cur,cnt,init) \ 1390#define array_needsize(type,base,cur,cnt,init) \
499 if (expect_false ((cnt) > (cur))) \ 1391 if (expect_false ((cnt) > (cur))) \
500 { \ 1392 { \
501 int ocur_ = (cur); \ 1393 int ecb_unused ocur_ = (cur); \
502 (base) = (type *)array_realloc \ 1394 (base) = (type *)array_realloc \
503 (sizeof (type), (base), &(cur), (cnt)); \ 1395 (sizeof (type), (base), &(cur), (cnt)); \
504 init ((base) + (ocur_), (cur) - ocur_); \ 1396 init ((base) + (ocur_), (cur) - ocur_); \
505 } 1397 }
506 1398
… …
513 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1405 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514 } 1406 }
515#endif 1407#endif
516 1408
517#define array_free(stem, idx) \ 1409#define array_free(stem, idx) \
518 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1410 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
519 1411
520/*****************************************************************************/ 1412/*****************************************************************************/
521 1413
1414/* dummy callback for pending events */
1415static void noinline
1416pendingcb (EV_P_ ev_prepare *w, int revents)
1417{
1418}
1419
522void noinline 1420void noinline
523ev_feed_event (EV_P_ void *w, int revents) 1421ev_feed_event (EV_P_ void *w, int revents) EV_THROW
524{ 1422{
525 W w_ = (W)w; 1423 W w_ = (W)w;
526 int pri = ABSPRI (w_); 1424 int pri = ABSPRI (w_);
527 1425
528 if (expect_false (w_->pending)) 1426 if (expect_false (w_->pending))
… …
534 pendings [pri][w_->pending - 1].w = w_; 1432 pendings [pri][w_->pending - 1].w = w_;
535 pendings [pri][w_->pending - 1].events = revents; 1433 pendings [pri][w_->pending - 1].events = revents;
536 } 1434 }
537} 1435}
538 1436
539void inline_speed 1437inline_speed void
1438feed_reverse (EV_P_ W w)
1439{
1440 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1441 rfeeds [rfeedcnt++] = w;
1442}
1443
1444inline_size void
1445feed_reverse_done (EV_P_ int revents)
1446{
1447 do
1448 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1449 while (rfeedcnt);
1450}
1451
1452inline_speed void
540queue_events (EV_P_ W *events, int eventcnt, int type) 1453queue_events (EV_P_ W *events, int eventcnt, int type)
541{ 1454{
542 int i; 1455 int i;
543 1456
544 for (i = 0; i < eventcnt; ++i) 1457 for (i = 0; i < eventcnt; ++i)
545 ev_feed_event (EV_A_ events [i], type); 1458 ev_feed_event (EV_A_ events [i], type);
546} 1459}
547 1460
548/*****************************************************************************/ 1461/*****************************************************************************/
549 1462
550void inline_size 1463inline_speed void
551anfds_init (ANFD *base, int count)
552{
553 while (count--)
554 {
555 base->head = 0;
556 base->events = EV_NONE;
557 base->reify = 0;
558
559 ++base;
560 }
561}
562
563void inline_speed
564fd_event (EV_P_ int fd, int revents) 1464fd_event_nocheck (EV_P_ int fd, int revents)
565{ 1465{
566 ANFD *anfd = anfds + fd; 1466 ANFD *anfd = anfds + fd;
567 ev_io *w; 1467 ev_io *w;
568 1468
569 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1469 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
573 if (ev) 1473 if (ev)
574 ev_feed_event (EV_A_ (W)w, ev); 1474 ev_feed_event (EV_A_ (W)w, ev);
575 } 1475 }
576} 1476}
577 1477
1478/* do not submit kernel events for fds that have reify set */
1479/* because that means they changed while we were polling for new events */
1480inline_speed void
1481fd_event (EV_P_ int fd, int revents)
1482{
1483 ANFD *anfd = anfds + fd;
1484
1485 if (expect_true (!anfd->reify))
1486 fd_event_nocheck (EV_A_ fd, revents);
1487}
1488
578void 1489void
579ev_feed_fd_event (EV_P_ int fd, int revents) 1490ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
580{ 1491{
581 if (fd >= 0 && fd < anfdmax) 1492 if (fd >= 0 && fd < anfdmax)
582 fd_event (EV_A_ fd, revents); 1493 fd_event_nocheck (EV_A_ fd, revents);
583} 1494}
584 1495
585void inline_size 1496/* make sure the external fd watch events are in-sync */
1497/* with the kernel/libev internal state */
1498inline_size void
586fd_reify (EV_P) 1499fd_reify (EV_P)
587{ 1500{
588 int i; 1501 int i;
1502
1503#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1504 for (i = 0; i < fdchangecnt; ++i)
1505 {
1506 int fd = fdchanges [i];
1507 ANFD *anfd = anfds + fd;
1508
1509 if (anfd->reify & EV__IOFDSET && anfd->head)
1510 {
1511 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1512
1513 if (handle != anfd->handle)
1514 {
1515 unsigned long arg;
1516
1517 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1518
1519 /* handle changed, but fd didn't - we need to do it in two steps */
1520 backend_modify (EV_A_ fd, anfd->events, 0);
1521 anfd->events = 0;
1522 anfd->handle = handle;
1523 }
1524 }
1525 }
1526#endif
589 1527
590 for (i = 0; i < fdchangecnt; ++i) 1528 for (i = 0; i < fdchangecnt; ++i)
591 { 1529 {
592 int fd = fdchanges [i]; 1530 int fd = fdchanges [i];
593 ANFD *anfd = anfds + fd; 1531 ANFD *anfd = anfds + fd;
594 ev_io *w; 1532 ev_io *w;
595 1533
596 unsigned char events = 0; 1534 unsigned char o_events = anfd->events;
1535 unsigned char o_reify = anfd->reify;
597 1536
598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1537 anfd->reify = 0;
599 events |= (unsigned char)w->events;
600 1538
601#if EV_SELECT_IS_WINSOCKET 1539 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
602 if (events)
603 { 1540 {
604 unsigned long argp; 1541 anfd->events = 0;
605 #ifdef EV_FD_TO_WIN32_HANDLE 1542
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1543 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
607 #else 1544 anfd->events |= (unsigned char)w->events;
608 anfd->handle = _get_osfhandle (fd); 1545
609 #endif 1546 if (o_events != anfd->events)
610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1547 o_reify = EV__IOFDSET; /* actually |= */
611 } 1548 }
612#endif
613 1549
614 { 1550 if (o_reify & EV__IOFDSET)
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
618 anfd->reify = 0;
619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events); 1551 backend_modify (EV_A_ fd, o_events, anfd->events);
623 }
624 } 1552 }
625 1553
626 fdchangecnt = 0; 1554 fdchangecnt = 0;
627} 1555}
628 1556
629void inline_size 1557/* something about the given fd changed */
1558inline_size void
630fd_change (EV_P_ int fd, int flags) 1559fd_change (EV_P_ int fd, int flags)
631{ 1560{
632 unsigned char reify = anfds [fd].reify; 1561 unsigned char reify = anfds [fd].reify;
633 anfds [fd].reify |= flags; 1562 anfds [fd].reify |= flags;
634 1563
… …
638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1567 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
639 fdchanges [fdchangecnt - 1] = fd; 1568 fdchanges [fdchangecnt - 1] = fd;
640 } 1569 }
641} 1570}
642 1571
643void inline_speed 1572/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1573inline_speed void ecb_cold
644fd_kill (EV_P_ int fd) 1574fd_kill (EV_P_ int fd)
645{ 1575{
646 ev_io *w; 1576 ev_io *w;
647 1577
648 while ((w = (ev_io *)anfds [fd].head)) 1578 while ((w = (ev_io *)anfds [fd].head))
… …
650 ev_io_stop (EV_A_ w); 1580 ev_io_stop (EV_A_ w);
651 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1581 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652 } 1582 }
653} 1583}
654 1584
655int inline_size 1585/* check whether the given fd is actually valid, for error recovery */
1586inline_size int ecb_cold
656fd_valid (int fd) 1587fd_valid (int fd)
657{ 1588{
658#ifdef _WIN32 1589#ifdef _WIN32
659 return _get_osfhandle (fd) != -1; 1590 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
660#else 1591#else
661 return fcntl (fd, F_GETFD) != -1; 1592 return fcntl (fd, F_GETFD) != -1;
662#endif 1593#endif
663} 1594}
664 1595
665/* called on EBADF to verify fds */ 1596/* called on EBADF to verify fds */
666static void noinline 1597static void noinline ecb_cold
667fd_ebadf (EV_P) 1598fd_ebadf (EV_P)
668{ 1599{
669 int fd; 1600 int fd;
670 1601
671 for (fd = 0; fd < anfdmax; ++fd) 1602 for (fd = 0; fd < anfdmax; ++fd)
672 if (anfds [fd].events) 1603 if (anfds [fd].events)
673 if (!fd_valid (fd) == -1 && errno == EBADF) 1604 if (!fd_valid (fd) && errno == EBADF)
674 fd_kill (EV_A_ fd); 1605 fd_kill (EV_A_ fd);
675} 1606}
676 1607
677/* called on ENOMEM in select/poll to kill some fds and retry */ 1608/* called on ENOMEM in select/poll to kill some fds and retry */
678static void noinline 1609static void noinline ecb_cold
679fd_enomem (EV_P) 1610fd_enomem (EV_P)
680{ 1611{
681 int fd; 1612 int fd;
682 1613
683 for (fd = anfdmax; fd--; ) 1614 for (fd = anfdmax; fd--; )
684 if (anfds [fd].events) 1615 if (anfds [fd].events)
685 { 1616 {
686 fd_kill (EV_A_ fd); 1617 fd_kill (EV_A_ fd);
687 return; 1618 break;
688 } 1619 }
689} 1620}
690 1621
691/* usually called after fork if backend needs to re-arm all fds from scratch */ 1622/* usually called after fork if backend needs to re-arm all fds from scratch */
692static void noinline 1623static void noinline
… …
696 1627
697 for (fd = 0; fd < anfdmax; ++fd) 1628 for (fd = 0; fd < anfdmax; ++fd)
698 if (anfds [fd].events) 1629 if (anfds [fd].events)
699 { 1630 {
700 anfds [fd].events = 0; 1631 anfds [fd].events = 0;
1632 anfds [fd].emask = 0;
701 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1633 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
702 } 1634 }
703} 1635}
704 1636
705/*****************************************************************************/ 1637/* used to prepare libev internal fd's */
706 1638/* this is not fork-safe */
707void inline_speed 1639inline_speed void
708upheap (WT *heap, int k)
709{
710 WT w = heap [k];
711
712 while (k)
713 {
714 int p = (k - 1) >> 1;
715
716 if (heap [p]->at <= w->at)
717 break;
718
719 heap [k] = heap [p];
720 ((W)heap [k])->active = k + 1;
721 k = p;
722 }
723
724 heap [k] = w;
725 ((W)heap [k])->active = k + 1;
726}
727
728void inline_speed
729downheap (WT *heap, int N, int k)
730{
731 WT w = heap [k];
732
733 for (;;)
734 {
735 int c = (k << 1) + 1;
736
737 if (c >= N)
738 break;
739
740 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741 ? 1 : 0;
742
743 if (w->at <= heap [c]->at)
744 break;
745
746 heap [k] = heap [c];
747 ((W)heap [k])->active = k + 1;
748
749 k = c;
750 }
751
752 heap [k] = w;
753 ((W)heap [k])->active = k + 1;
754}
755
756void inline_size
757adjustheap (WT *heap, int N, int k)
758{
759 upheap (heap, k);
760 downheap (heap, N, k);
761}
762
763/*****************************************************************************/
764
765typedef struct
766{
767 WL head;
768 sig_atomic_t volatile gotsig;
769} ANSIG;
770
771static ANSIG *signals;
772static int signalmax;
773
774static int sigpipe [2];
775static sig_atomic_t volatile gotsig;
776static ev_io sigev;
777
778void inline_size
779signals_init (ANSIG *base, int count)
780{
781 while (count--)
782 {
783 base->head = 0;
784 base->gotsig = 0;
785
786 ++base;
787 }
788}
789
790static void
791sighandler (int signum)
792{
793#if _WIN32
794 signal (signum, sighandler);
795#endif
796
797 signals [signum - 1].gotsig = 1;
798
799 if (!gotsig)
800 {
801 int old_errno = errno;
802 gotsig = 1;
803 write (sigpipe [1], &signum, 1);
804 errno = old_errno;
805 }
806}
807
808void noinline
809ev_feed_signal_event (EV_P_ int signum)
810{
811 WL w;
812
813#if EV_MULTIPLICITY
814 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
815#endif
816
817 --signum;
818
819 if (signum < 0 || signum >= signalmax)
820 return;
821
822 signals [signum].gotsig = 0;
823
824 for (w = signals [signum].head; w; w = w->next)
825 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
826}
827
828static void
829sigcb (EV_P_ ev_io *iow, int revents)
830{
831 int signum;
832
833 read (sigpipe [0], &revents, 1);
834 gotsig = 0;
835
836 for (signum = signalmax; signum--; )
837 if (signals [signum].gotsig)
838 ev_feed_signal_event (EV_A_ signum + 1);
839}
840
841void inline_speed
842fd_intern (int fd) 1640fd_intern (int fd)
843{ 1641{
844#ifdef _WIN32 1642#ifdef _WIN32
845 int arg = 1; 1643 unsigned long arg = 1;
846 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1644 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
847#else 1645#else
848 fcntl (fd, F_SETFD, FD_CLOEXEC); 1646 fcntl (fd, F_SETFD, FD_CLOEXEC);
849 fcntl (fd, F_SETFL, O_NONBLOCK); 1647 fcntl (fd, F_SETFL, O_NONBLOCK);
850#endif 1648#endif
851} 1649}
852 1650
853static void noinline
854siginit (EV_P)
855{
856 fd_intern (sigpipe [0]);
857 fd_intern (sigpipe [1]);
858
859 ev_io_set (&sigev, sigpipe [0], EV_READ);
860 ev_io_start (EV_A_ &sigev);
861 ev_unref (EV_A); /* child watcher should not keep loop alive */
862}
863
864/*****************************************************************************/ 1651/*****************************************************************************/
865 1652
1653/*
1654 * the heap functions want a real array index. array index 0 is guaranteed to not
1655 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1656 * the branching factor of the d-tree.
1657 */
1658
1659/*
1660 * at the moment we allow libev the luxury of two heaps,
1661 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1662 * which is more cache-efficient.
1663 * the difference is about 5% with 50000+ watchers.
1664 */
1665#if EV_USE_4HEAP
1666
1667#define DHEAP 4
1668#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1669#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1670#define UPHEAP_DONE(p,k) ((p) == (k))
1671
1672/* away from the root */
1673inline_speed void
1674downheap (ANHE *heap, int N, int k)
1675{
1676 ANHE he = heap [k];
1677 ANHE *E = heap + N + HEAP0;
1678
1679 for (;;)
1680 {
1681 ev_tstamp minat;
1682 ANHE *minpos;
1683 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1684
1685 /* find minimum child */
1686 if (expect_true (pos + DHEAP - 1 < E))
1687 {
1688 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1689 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1690 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1691 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1692 }
1693 else if (pos < E)
1694 {
1695 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1696 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1697 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1698 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1699 }
1700 else
1701 break;
1702
1703 if (ANHE_at (he) <= minat)
1704 break;
1705
1706 heap [k] = *minpos;
1707 ev_active (ANHE_w (*minpos)) = k;
1708
1709 k = minpos - heap;
1710 }
1711
1712 heap [k] = he;
1713 ev_active (ANHE_w (he)) = k;
1714}
1715
1716#else /* 4HEAP */
1717
1718#define HEAP0 1
1719#define HPARENT(k) ((k) >> 1)
1720#define UPHEAP_DONE(p,k) (!(p))
1721
1722/* away from the root */
1723inline_speed void
1724downheap (ANHE *heap, int N, int k)
1725{
1726 ANHE he = heap [k];
1727
1728 for (;;)
1729 {
1730 int c = k << 1;
1731
1732 if (c >= N + HEAP0)
1733 break;
1734
1735 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1736 ? 1 : 0;
1737
1738 if (ANHE_at (he) <= ANHE_at (heap [c]))
1739 break;
1740
1741 heap [k] = heap [c];
1742 ev_active (ANHE_w (heap [k])) = k;
1743
1744 k = c;
1745 }
1746
1747 heap [k] = he;
1748 ev_active (ANHE_w (he)) = k;
1749}
1750#endif
1751
1752/* towards the root */
1753inline_speed void
1754upheap (ANHE *heap, int k)
1755{
1756 ANHE he = heap [k];
1757
1758 for (;;)
1759 {
1760 int p = HPARENT (k);
1761
1762 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1763 break;
1764
1765 heap [k] = heap [p];
1766 ev_active (ANHE_w (heap [k])) = k;
1767 k = p;
1768 }
1769
1770 heap [k] = he;
1771 ev_active (ANHE_w (he)) = k;
1772}
1773
1774/* move an element suitably so it is in a correct place */
1775inline_size void
1776adjustheap (ANHE *heap, int N, int k)
1777{
1778 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1779 upheap (heap, k);
1780 else
1781 downheap (heap, N, k);
1782}
1783
1784/* rebuild the heap: this function is used only once and executed rarely */
1785inline_size void
1786reheap (ANHE *heap, int N)
1787{
1788 int i;
1789
1790 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1791 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1792 for (i = 0; i < N; ++i)
1793 upheap (heap, i + HEAP0);
1794}
1795
1796/*****************************************************************************/
1797
1798/* associate signal watchers to a signal signal */
1799typedef struct
1800{
1801 EV_ATOMIC_T pending;
1802#if EV_MULTIPLICITY
1803 EV_P;
1804#endif
1805 WL head;
1806} ANSIG;
1807
1808static ANSIG signals [EV_NSIG - 1];
1809
1810/*****************************************************************************/
1811
1812#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1813
1814static void noinline ecb_cold
1815evpipe_init (EV_P)
1816{
1817 if (!ev_is_active (&pipe_w))
1818 {
1819# if EV_USE_EVENTFD
1820 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1821 if (evfd < 0 && errno == EINVAL)
1822 evfd = eventfd (0, 0);
1823
1824 if (evfd >= 0)
1825 {
1826 evpipe [0] = -1;
1827 fd_intern (evfd); /* doing it twice doesn't hurt */
1828 ev_io_set (&pipe_w, evfd, EV_READ);
1829 }
1830 else
1831# endif
1832 {
1833 while (pipe (evpipe))
1834 ev_syserr ("(libev) error creating signal/async pipe");
1835
1836 fd_intern (evpipe [0]);
1837 fd_intern (evpipe [1]);
1838 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1839 }
1840
1841 ev_io_start (EV_A_ &pipe_w);
1842 ev_unref (EV_A); /* watcher should not keep loop alive */
1843 }
1844}
1845
1846inline_speed void
1847evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1848{
1849 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1850
1851 if (expect_true (*flag))
1852 return;
1853
1854 *flag = 1;
1855
1856 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1857
1858 pipe_write_skipped = 1;
1859
1860 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1861
1862 if (pipe_write_wanted)
1863 {
1864 int old_errno;
1865
1866 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1867
1868 old_errno = errno; /* save errno because write will clobber it */
1869
1870#if EV_USE_EVENTFD
1871 if (evfd >= 0)
1872 {
1873 uint64_t counter = 1;
1874 write (evfd, &counter, sizeof (uint64_t));
1875 }
1876 else
1877#endif
1878 {
1879 /* win32 people keep sending patches that change this write() to send() */
1880 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1881 /* so when you think this write should be a send instead, please find out */
1882 /* where your send() is from - it's definitely not the microsoft send, and */
1883 /* tell me. thank you. */
1884 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1885 /* check the ev documentation on how to use this flag */
1886 write (evpipe [1], &(evpipe [1]), 1);
1887 }
1888
1889 errno = old_errno;
1890 }
1891}
1892
1893/* called whenever the libev signal pipe */
1894/* got some events (signal, async) */
1895static void
1896pipecb (EV_P_ ev_io *iow, int revents)
1897{
1898 int i;
1899
1900 if (revents & EV_READ)
1901 {
1902#if EV_USE_EVENTFD
1903 if (evfd >= 0)
1904 {
1905 uint64_t counter;
1906 read (evfd, &counter, sizeof (uint64_t));
1907 }
1908 else
1909#endif
1910 {
1911 char dummy;
1912 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1913 read (evpipe [0], &dummy, 1);
1914 }
1915 }
1916
1917 pipe_write_skipped = 0;
1918
1919 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1920
1921#if EV_SIGNAL_ENABLE
1922 if (sig_pending)
1923 {
1924 sig_pending = 0;
1925
1926 ECB_MEMORY_FENCE_RELEASE;
1927
1928 for (i = EV_NSIG - 1; i--; )
1929 if (expect_false (signals [i].pending))
1930 ev_feed_signal_event (EV_A_ i + 1);
1931 }
1932#endif
1933
1934#if EV_ASYNC_ENABLE
1935 if (async_pending)
1936 {
1937 async_pending = 0;
1938
1939 ECB_MEMORY_FENCE_RELEASE;
1940
1941 for (i = asynccnt; i--; )
1942 if (asyncs [i]->sent)
1943 {
1944 asyncs [i]->sent = 0;
1945 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1946 }
1947 }
1948#endif
1949}
1950
1951/*****************************************************************************/
1952
1953void
1954ev_feed_signal (int signum) EV_THROW
1955{
1956#if EV_MULTIPLICITY
1957 EV_P = signals [signum - 1].loop;
1958
1959 if (!EV_A)
1960 return;
1961#endif
1962
1963 if (!ev_active (&pipe_w))
1964 return;
1965
1966 signals [signum - 1].pending = 1;
1967 evpipe_write (EV_A_ &sig_pending);
1968}
1969
1970static void
1971ev_sighandler (int signum)
1972{
1973#ifdef _WIN32
1974 signal (signum, ev_sighandler);
1975#endif
1976
1977 ev_feed_signal (signum);
1978}
1979
1980void noinline
1981ev_feed_signal_event (EV_P_ int signum) EV_THROW
1982{
1983 WL w;
1984
1985 if (expect_false (signum <= 0 || signum > EV_NSIG))
1986 return;
1987
1988 --signum;
1989
1990#if EV_MULTIPLICITY
1991 /* it is permissible to try to feed a signal to the wrong loop */
1992 /* or, likely more useful, feeding a signal nobody is waiting for */
1993
1994 if (expect_false (signals [signum].loop != EV_A))
1995 return;
1996#endif
1997
1998 signals [signum].pending = 0;
1999
2000 for (w = signals [signum].head; w; w = w->next)
2001 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2002}
2003
2004#if EV_USE_SIGNALFD
2005static void
2006sigfdcb (EV_P_ ev_io *iow, int revents)
2007{
2008 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2009
2010 for (;;)
2011 {
2012 ssize_t res = read (sigfd, si, sizeof (si));
2013
2014 /* not ISO-C, as res might be -1, but works with SuS */
2015 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2016 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2017
2018 if (res < (ssize_t)sizeof (si))
2019 break;
2020 }
2021}
2022#endif
2023
2024#endif
2025
2026/*****************************************************************************/
2027
2028#if EV_CHILD_ENABLE
866static WL childs [EV_PID_HASHSIZE]; 2029static WL childs [EV_PID_HASHSIZE];
867 2030
868#ifndef _WIN32
869
870static ev_signal childev; 2031static ev_signal childev;
871 2032
872void inline_speed 2033#ifndef WIFCONTINUED
2034# define WIFCONTINUED(status) 0
2035#endif
2036
2037/* handle a single child status event */
2038inline_speed void
873child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2039child_reap (EV_P_ int chain, int pid, int status)
874{ 2040{
875 ev_child *w; 2041 ev_child *w;
2042 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
876 2043
877 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2044 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2045 {
878 if (w->pid == pid || !w->pid) 2046 if ((w->pid == pid || !w->pid)
2047 && (!traced || (w->flags & 1)))
879 { 2048 {
880 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2049 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
881 w->rpid = pid; 2050 w->rpid = pid;
882 w->rstatus = status; 2051 w->rstatus = status;
883 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2052 ev_feed_event (EV_A_ (W)w, EV_CHILD);
884 } 2053 }
2054 }
885} 2055}
886 2056
887#ifndef WCONTINUED 2057#ifndef WCONTINUED
888# define WCONTINUED 0 2058# define WCONTINUED 0
889#endif 2059#endif
890 2060
2061/* called on sigchld etc., calls waitpid */
891static void 2062static void
892childcb (EV_P_ ev_signal *sw, int revents) 2063childcb (EV_P_ ev_signal *sw, int revents)
893{ 2064{
894 int pid, status; 2065 int pid, status;
895 2066
… …
898 if (!WCONTINUED 2069 if (!WCONTINUED
899 || errno != EINVAL 2070 || errno != EINVAL
900 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2071 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
901 return; 2072 return;
902 2073
903 /* make sure we are called again until all childs have been reaped */ 2074 /* make sure we are called again until all children have been reaped */
904 /* we need to do it this way so that the callback gets called before we continue */ 2075 /* we need to do it this way so that the callback gets called before we continue */
905 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2076 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
906 2077
907 child_reap (EV_A_ sw, pid, pid, status); 2078 child_reap (EV_A_ pid, pid, status);
908 if (EV_PID_HASHSIZE > 1) 2079 if ((EV_PID_HASHSIZE) > 1)
909 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2080 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
910} 2081}
911 2082
912#endif 2083#endif
913 2084
914/*****************************************************************************/ 2085/*****************************************************************************/
915 2086
2087#if EV_USE_IOCP
2088# include "ev_iocp.c"
2089#endif
916#if EV_USE_PORT 2090#if EV_USE_PORT
917# include "ev_port.c" 2091# include "ev_port.c"
918#endif 2092#endif
919#if EV_USE_KQUEUE 2093#if EV_USE_KQUEUE
920# include "ev_kqueue.c" 2094# include "ev_kqueue.c"
… …
927#endif 2101#endif
928#if EV_USE_SELECT 2102#if EV_USE_SELECT
929# include "ev_select.c" 2103# include "ev_select.c"
930#endif 2104#endif
931 2105
932int 2106int ecb_cold
933ev_version_major (void) 2107ev_version_major (void) EV_THROW
934{ 2108{
935 return EV_VERSION_MAJOR; 2109 return EV_VERSION_MAJOR;
936} 2110}
937 2111
938int 2112int ecb_cold
939ev_version_minor (void) 2113ev_version_minor (void) EV_THROW
940{ 2114{
941 return EV_VERSION_MINOR; 2115 return EV_VERSION_MINOR;
942} 2116}
943 2117
944/* return true if we are running with elevated privileges and should ignore env variables */ 2118/* return true if we are running with elevated privileges and should ignore env variables */
945int inline_size 2119int inline_size ecb_cold
946enable_secure (void) 2120enable_secure (void)
947{ 2121{
948#ifdef _WIN32 2122#ifdef _WIN32
949 return 0; 2123 return 0;
950#else 2124#else
951 return getuid () != geteuid () 2125 return getuid () != geteuid ()
952 || getgid () != getegid (); 2126 || getgid () != getegid ();
953#endif 2127#endif
954} 2128}
955 2129
956unsigned int 2130unsigned int ecb_cold
957ev_supported_backends (void) 2131ev_supported_backends (void) EV_THROW
958{ 2132{
959 unsigned int flags = 0; 2133 unsigned int flags = 0;
960 2134
961 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
962 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2136 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
965 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2139 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
966 2140
967 return flags; 2141 return flags;
968} 2142}
969 2143
970unsigned int 2144unsigned int ecb_cold
971ev_recommended_backends (void) 2145ev_recommended_backends (void) EV_THROW
972{ 2146{
973 unsigned int flags = ev_supported_backends (); 2147 unsigned int flags = ev_supported_backends ();
974 2148
975#ifndef __NetBSD__ 2149#ifndef __NetBSD__
976 /* kqueue is borked on everything but netbsd apparently */ 2150 /* kqueue is borked on everything but netbsd apparently */
977 /* it usually doesn't work correctly on anything but sockets and pipes */ 2151 /* it usually doesn't work correctly on anything but sockets and pipes */
978 flags &= ~EVBACKEND_KQUEUE; 2152 flags &= ~EVBACKEND_KQUEUE;
979#endif 2153#endif
980#ifdef __APPLE__ 2154#ifdef __APPLE__
981 // flags &= ~EVBACKEND_KQUEUE; for documentation 2155 /* only select works correctly on that "unix-certified" platform */
982 flags &= ~EVBACKEND_POLL; 2156 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2157 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2158#endif
2159#ifdef __FreeBSD__
2160 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
983#endif 2161#endif
984 2162
985 return flags; 2163 return flags;
986} 2164}
987 2165
2166unsigned int ecb_cold
2167ev_embeddable_backends (void) EV_THROW
2168{
2169 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2170
2171 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2172 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2173 flags &= ~EVBACKEND_EPOLL;
2174
2175 return flags;
2176}
2177
988unsigned int 2178unsigned int
989ev_embeddable_backends (void) 2179ev_backend (EV_P) EV_THROW
990{ 2180{
991 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2181 return backend;
992
993 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
994 /* please fix it and tell me how to detect the fix */
995 flags &= ~EVBACKEND_EPOLL;
996
997 return flags;
998} 2182}
999 2183
2184#if EV_FEATURE_API
1000unsigned int 2185unsigned int
1001ev_backend (EV_P) 2186ev_iteration (EV_P) EV_THROW
1002{ 2187{
1003 return backend; 2188 return loop_count;
1004} 2189}
1005 2190
1006unsigned int 2191unsigned int
1007ev_loop_count (EV_P) 2192ev_depth (EV_P) EV_THROW
1008{ 2193{
1009 return loop_count; 2194 return loop_depth;
1010} 2195}
1011 2196
1012void 2197void
1013ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2198ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1014{ 2199{
1015 io_blocktime = interval; 2200 io_blocktime = interval;
1016} 2201}
1017 2202
1018void 2203void
1019ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2204ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1020{ 2205{
1021 timeout_blocktime = interval; 2206 timeout_blocktime = interval;
1022} 2207}
1023 2208
2209void
2210ev_set_userdata (EV_P_ void *data) EV_THROW
2211{
2212 userdata = data;
2213}
2214
2215void *
2216ev_userdata (EV_P) EV_THROW
2217{
2218 return userdata;
2219}
2220
2221void
2222ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2223{
2224 invoke_cb = invoke_pending_cb;
2225}
2226
2227void
2228ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2229{
2230 release_cb = release;
2231 acquire_cb = acquire;
2232}
2233#endif
2234
2235/* initialise a loop structure, must be zero-initialised */
1024static void noinline 2236static void noinline ecb_cold
1025loop_init (EV_P_ unsigned int flags) 2237loop_init (EV_P_ unsigned int flags) EV_THROW
1026{ 2238{
1027 if (!backend) 2239 if (!backend)
1028 { 2240 {
2241 origflags = flags;
2242
2243#if EV_USE_REALTIME
2244 if (!have_realtime)
2245 {
2246 struct timespec ts;
2247
2248 if (!clock_gettime (CLOCK_REALTIME, &ts))
2249 have_realtime = 1;
2250 }
2251#endif
2252
1029#if EV_USE_MONOTONIC 2253#if EV_USE_MONOTONIC
2254 if (!have_monotonic)
1030 { 2255 {
1031 struct timespec ts; 2256 struct timespec ts;
2257
1032 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2258 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1033 have_monotonic = 1; 2259 have_monotonic = 1;
1034 } 2260 }
1035#endif 2261#endif
1036
1037 ev_rt_now = ev_time ();
1038 mn_now = get_clock ();
1039 now_floor = mn_now;
1040 rtmn_diff = ev_rt_now - mn_now;
1041
1042 io_blocktime = 0.;
1043 timeout_blocktime = 0.;
1044 2262
1045 /* pid check not overridable via env */ 2263 /* pid check not overridable via env */
1046#ifndef _WIN32 2264#ifndef _WIN32
1047 if (flags & EVFLAG_FORKCHECK) 2265 if (flags & EVFLAG_FORKCHECK)
1048 curpid = getpid (); 2266 curpid = getpid ();
… …
1051 if (!(flags & EVFLAG_NOENV) 2269 if (!(flags & EVFLAG_NOENV)
1052 && !enable_secure () 2270 && !enable_secure ()
1053 && getenv ("LIBEV_FLAGS")) 2271 && getenv ("LIBEV_FLAGS"))
1054 flags = atoi (getenv ("LIBEV_FLAGS")); 2272 flags = atoi (getenv ("LIBEV_FLAGS"));
1055 2273
1056 if (!(flags & 0x0000ffffUL)) 2274 ev_rt_now = ev_time ();
2275 mn_now = get_clock ();
2276 now_floor = mn_now;
2277 rtmn_diff = ev_rt_now - mn_now;
2278#if EV_FEATURE_API
2279 invoke_cb = ev_invoke_pending;
2280#endif
2281
2282 io_blocktime = 0.;
2283 timeout_blocktime = 0.;
2284 backend = 0;
2285 backend_fd = -1;
2286 sig_pending = 0;
2287#if EV_ASYNC_ENABLE
2288 async_pending = 0;
2289#endif
2290 pipe_write_skipped = 0;
2291 pipe_write_wanted = 0;
2292#if EV_USE_INOTIFY
2293 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2294#endif
2295#if EV_USE_SIGNALFD
2296 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2297#endif
2298
2299 if (!(flags & EVBACKEND_MASK))
1057 flags |= ev_recommended_backends (); 2300 flags |= ev_recommended_backends ();
1058 2301
1059 backend = 0;
1060 backend_fd = -1;
1061#if EV_USE_INOTIFY 2302#if EV_USE_IOCP
1062 fs_fd = -2; 2303 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1063#endif 2304#endif
1064
1065#if EV_USE_PORT 2305#if EV_USE_PORT
1066 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2306 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1067#endif 2307#endif
1068#if EV_USE_KQUEUE 2308#if EV_USE_KQUEUE
1069 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2309 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1076#endif 2316#endif
1077#if EV_USE_SELECT 2317#if EV_USE_SELECT
1078 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2318 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1079#endif 2319#endif
1080 2320
2321 ev_prepare_init (&pending_w, pendingcb);
2322
2323#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1081 ev_init (&sigev, sigcb); 2324 ev_init (&pipe_w, pipecb);
1082 ev_set_priority (&sigev, EV_MAXPRI); 2325 ev_set_priority (&pipe_w, EV_MAXPRI);
2326#endif
1083 } 2327 }
1084} 2328}
1085 2329
1086static void noinline 2330/* free up a loop structure */
2331void ecb_cold
1087loop_destroy (EV_P) 2332ev_loop_destroy (EV_P)
1088{ 2333{
1089 int i; 2334 int i;
2335
2336#if EV_MULTIPLICITY
2337 /* mimic free (0) */
2338 if (!EV_A)
2339 return;
2340#endif
2341
2342#if EV_CLEANUP_ENABLE
2343 /* queue cleanup watchers (and execute them) */
2344 if (expect_false (cleanupcnt))
2345 {
2346 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2347 EV_INVOKE_PENDING;
2348 }
2349#endif
2350
2351#if EV_CHILD_ENABLE
2352 if (ev_is_active (&childev))
2353 {
2354 ev_ref (EV_A); /* child watcher */
2355 ev_signal_stop (EV_A_ &childev);
2356 }
2357#endif
2358
2359 if (ev_is_active (&pipe_w))
2360 {
2361 /*ev_ref (EV_A);*/
2362 /*ev_io_stop (EV_A_ &pipe_w);*/
2363
2364#if EV_USE_EVENTFD
2365 if (evfd >= 0)
2366 close (evfd);
2367#endif
2368
2369 if (evpipe [0] >= 0)
2370 {
2371 EV_WIN32_CLOSE_FD (evpipe [0]);
2372 EV_WIN32_CLOSE_FD (evpipe [1]);
2373 }
2374 }
2375
2376#if EV_USE_SIGNALFD
2377 if (ev_is_active (&sigfd_w))
2378 close (sigfd);
2379#endif
1090 2380
1091#if EV_USE_INOTIFY 2381#if EV_USE_INOTIFY
1092 if (fs_fd >= 0) 2382 if (fs_fd >= 0)
1093 close (fs_fd); 2383 close (fs_fd);
1094#endif 2384#endif
1095 2385
1096 if (backend_fd >= 0) 2386 if (backend_fd >= 0)
1097 close (backend_fd); 2387 close (backend_fd);
1098 2388
2389#if EV_USE_IOCP
2390 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2391#endif
1099#if EV_USE_PORT 2392#if EV_USE_PORT
1100 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2393 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1101#endif 2394#endif
1102#if EV_USE_KQUEUE 2395#if EV_USE_KQUEUE
1103 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2396 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1118#if EV_IDLE_ENABLE 2411#if EV_IDLE_ENABLE
1119 array_free (idle, [i]); 2412 array_free (idle, [i]);
1120#endif 2413#endif
1121 } 2414 }
1122 2415
1123 ev_free (anfds); anfdmax = 0; 2416 ev_free (anfds); anfds = 0; anfdmax = 0;
1124 2417
1125 /* have to use the microsoft-never-gets-it-right macro */ 2418 /* have to use the microsoft-never-gets-it-right macro */
2419 array_free (rfeed, EMPTY);
1126 array_free (fdchange, EMPTY); 2420 array_free (fdchange, EMPTY);
1127 array_free (timer, EMPTY); 2421 array_free (timer, EMPTY);
1128#if EV_PERIODIC_ENABLE 2422#if EV_PERIODIC_ENABLE
1129 array_free (periodic, EMPTY); 2423 array_free (periodic, EMPTY);
1130#endif 2424#endif
1131#if EV_FORK_ENABLE 2425#if EV_FORK_ENABLE
1132 array_free (fork, EMPTY); 2426 array_free (fork, EMPTY);
1133#endif 2427#endif
2428#if EV_CLEANUP_ENABLE
2429 array_free (cleanup, EMPTY);
2430#endif
1134 array_free (prepare, EMPTY); 2431 array_free (prepare, EMPTY);
1135 array_free (check, EMPTY); 2432 array_free (check, EMPTY);
2433#if EV_ASYNC_ENABLE
2434 array_free (async, EMPTY);
2435#endif
1136 2436
1137 backend = 0; 2437 backend = 0;
1138}
1139 2438
2439#if EV_MULTIPLICITY
2440 if (ev_is_default_loop (EV_A))
2441#endif
2442 ev_default_loop_ptr = 0;
2443#if EV_MULTIPLICITY
2444 else
2445 ev_free (EV_A);
2446#endif
2447}
2448
2449#if EV_USE_INOTIFY
1140void inline_size infy_fork (EV_P); 2450inline_size void infy_fork (EV_P);
2451#endif
1141 2452
1142void inline_size 2453inline_size void
1143loop_fork (EV_P) 2454loop_fork (EV_P)
1144{ 2455{
1145#if EV_USE_PORT 2456#if EV_USE_PORT
1146 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2457 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1147#endif 2458#endif
… …
1153#endif 2464#endif
1154#if EV_USE_INOTIFY 2465#if EV_USE_INOTIFY
1155 infy_fork (EV_A); 2466 infy_fork (EV_A);
1156#endif 2467#endif
1157 2468
1158 if (ev_is_active (&sigev)) 2469 if (ev_is_active (&pipe_w))
1159 { 2470 {
1160 /* default loop */ 2471 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1161 2472
1162 ev_ref (EV_A); 2473 ev_ref (EV_A);
1163 ev_io_stop (EV_A_ &sigev); 2474 ev_io_stop (EV_A_ &pipe_w);
1164 close (sigpipe [0]);
1165 close (sigpipe [1]);
1166 2475
1167 while (pipe (sigpipe)) 2476#if EV_USE_EVENTFD
1168 syserr ("(libev) error creating pipe"); 2477 if (evfd >= 0)
2478 close (evfd);
2479#endif
1169 2480
2481 if (evpipe [0] >= 0)
2482 {
2483 EV_WIN32_CLOSE_FD (evpipe [0]);
2484 EV_WIN32_CLOSE_FD (evpipe [1]);
2485 }
2486
2487#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1170 siginit (EV_A); 2488 evpipe_init (EV_A);
2489 /* now iterate over everything, in case we missed something */
2490 pipecb (EV_A_ &pipe_w, EV_READ);
2491#endif
1171 } 2492 }
1172 2493
1173 postfork = 0; 2494 postfork = 0;
1174} 2495}
1175 2496
1176#if EV_MULTIPLICITY 2497#if EV_MULTIPLICITY
2498
1177struct ev_loop * 2499struct ev_loop * ecb_cold
1178ev_loop_new (unsigned int flags) 2500ev_loop_new (unsigned int flags) EV_THROW
1179{ 2501{
1180 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2502 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1181 2503
1182 memset (loop, 0, sizeof (struct ev_loop)); 2504 memset (EV_A, 0, sizeof (struct ev_loop));
1183
1184 loop_init (EV_A_ flags); 2505 loop_init (EV_A_ flags);
1185 2506
1186 if (ev_backend (EV_A)) 2507 if (ev_backend (EV_A))
1187 return loop; 2508 return EV_A;
1188 2509
2510 ev_free (EV_A);
1189 return 0; 2511 return 0;
1190} 2512}
1191 2513
1192void 2514#endif /* multiplicity */
1193ev_loop_destroy (EV_P)
1194{
1195 loop_destroy (EV_A);
1196 ev_free (loop);
1197}
1198 2515
1199void 2516#if EV_VERIFY
1200ev_loop_fork (EV_P) 2517static void noinline ecb_cold
2518verify_watcher (EV_P_ W w)
1201{ 2519{
1202 postfork = 1; 2520 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1203}
1204 2521
2522 if (w->pending)
2523 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2524}
2525
2526static void noinline ecb_cold
2527verify_heap (EV_P_ ANHE *heap, int N)
2528{
2529 int i;
2530
2531 for (i = HEAP0; i < N + HEAP0; ++i)
2532 {
2533 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2534 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2535 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2536
2537 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2538 }
2539}
2540
2541static void noinline ecb_cold
2542array_verify (EV_P_ W *ws, int cnt)
2543{
2544 while (cnt--)
2545 {
2546 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2547 verify_watcher (EV_A_ ws [cnt]);
2548 }
2549}
2550#endif
2551
2552#if EV_FEATURE_API
2553void ecb_cold
2554ev_verify (EV_P) EV_THROW
2555{
2556#if EV_VERIFY
2557 int i;
2558 WL w;
2559
2560 assert (activecnt >= -1);
2561
2562 assert (fdchangemax >= fdchangecnt);
2563 for (i = 0; i < fdchangecnt; ++i)
2564 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2565
2566 assert (anfdmax >= 0);
2567 for (i = 0; i < anfdmax; ++i)
2568 for (w = anfds [i].head; w; w = w->next)
2569 {
2570 verify_watcher (EV_A_ (W)w);
2571 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2572 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2573 }
2574
2575 assert (timermax >= timercnt);
2576 verify_heap (EV_A_ timers, timercnt);
2577
2578#if EV_PERIODIC_ENABLE
2579 assert (periodicmax >= periodiccnt);
2580 verify_heap (EV_A_ periodics, periodiccnt);
2581#endif
2582
2583 for (i = NUMPRI; i--; )
2584 {
2585 assert (pendingmax [i] >= pendingcnt [i]);
2586#if EV_IDLE_ENABLE
2587 assert (idleall >= 0);
2588 assert (idlemax [i] >= idlecnt [i]);
2589 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2590#endif
2591 }
2592
2593#if EV_FORK_ENABLE
2594 assert (forkmax >= forkcnt);
2595 array_verify (EV_A_ (W *)forks, forkcnt);
2596#endif
2597
2598#if EV_CLEANUP_ENABLE
2599 assert (cleanupmax >= cleanupcnt);
2600 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2601#endif
2602
2603#if EV_ASYNC_ENABLE
2604 assert (asyncmax >= asynccnt);
2605 array_verify (EV_A_ (W *)asyncs, asynccnt);
2606#endif
2607
2608#if EV_PREPARE_ENABLE
2609 assert (preparemax >= preparecnt);
2610 array_verify (EV_A_ (W *)prepares, preparecnt);
2611#endif
2612
2613#if EV_CHECK_ENABLE
2614 assert (checkmax >= checkcnt);
2615 array_verify (EV_A_ (W *)checks, checkcnt);
2616#endif
2617
2618# if 0
2619#if EV_CHILD_ENABLE
2620 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2621 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2622#endif
2623# endif
2624#endif
2625}
1205#endif 2626#endif
1206 2627
1207#if EV_MULTIPLICITY 2628#if EV_MULTIPLICITY
1208struct ev_loop * 2629struct ev_loop * ecb_cold
1209ev_default_loop_init (unsigned int flags)
1210#else 2630#else
1211int 2631int
2632#endif
1212ev_default_loop (unsigned int flags) 2633ev_default_loop (unsigned int flags) EV_THROW
1213#endif
1214{ 2634{
1215 if (sigpipe [0] == sigpipe [1])
1216 if (pipe (sigpipe))
1217 return 0;
1218
1219 if (!ev_default_loop_ptr) 2635 if (!ev_default_loop_ptr)
1220 { 2636 {
1221#if EV_MULTIPLICITY 2637#if EV_MULTIPLICITY
1222 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2638 EV_P = ev_default_loop_ptr = &default_loop_struct;
1223#else 2639#else
1224 ev_default_loop_ptr = 1; 2640 ev_default_loop_ptr = 1;
1225#endif 2641#endif
1226 2642
1227 loop_init (EV_A_ flags); 2643 loop_init (EV_A_ flags);
1228 2644
1229 if (ev_backend (EV_A)) 2645 if (ev_backend (EV_A))
1230 { 2646 {
1231 siginit (EV_A); 2647#if EV_CHILD_ENABLE
1232
1233#ifndef _WIN32
1234 ev_signal_init (&childev, childcb, SIGCHLD); 2648 ev_signal_init (&childev, childcb, SIGCHLD);
1235 ev_set_priority (&childev, EV_MAXPRI); 2649 ev_set_priority (&childev, EV_MAXPRI);
1236 ev_signal_start (EV_A_ &childev); 2650 ev_signal_start (EV_A_ &childev);
1237 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2651 ev_unref (EV_A); /* child watcher should not keep loop alive */
1238#endif 2652#endif
… …
1243 2657
1244 return ev_default_loop_ptr; 2658 return ev_default_loop_ptr;
1245} 2659}
1246 2660
1247void 2661void
1248ev_default_destroy (void) 2662ev_loop_fork (EV_P) EV_THROW
1249{ 2663{
1250#if EV_MULTIPLICITY 2664 postfork = 1; /* must be in line with ev_default_fork */
1251 struct ev_loop *loop = ev_default_loop_ptr;
1252#endif
1253
1254#ifndef _WIN32
1255 ev_ref (EV_A); /* child watcher */
1256 ev_signal_stop (EV_A_ &childev);
1257#endif
1258
1259 ev_ref (EV_A); /* signal watcher */
1260 ev_io_stop (EV_A_ &sigev);
1261
1262 close (sigpipe [0]); sigpipe [0] = 0;
1263 close (sigpipe [1]); sigpipe [1] = 0;
1264
1265 loop_destroy (EV_A);
1266}
1267
1268void
1269ev_default_fork (void)
1270{
1271#if EV_MULTIPLICITY
1272 struct ev_loop *loop = ev_default_loop_ptr;
1273#endif
1274
1275 if (backend)
1276 postfork = 1;
1277} 2665}
1278 2666
1279/*****************************************************************************/ 2667/*****************************************************************************/
1280 2668
1281void 2669void
1282ev_invoke (EV_P_ void *w, int revents) 2670ev_invoke (EV_P_ void *w, int revents)
1283{ 2671{
1284 EV_CB_INVOKE ((W)w, revents); 2672 EV_CB_INVOKE ((W)w, revents);
1285} 2673}
1286 2674
1287void inline_speed 2675unsigned int
1288call_pending (EV_P) 2676ev_pending_count (EV_P) EV_THROW
2677{
2678 int pri;
2679 unsigned int count = 0;
2680
2681 for (pri = NUMPRI; pri--; )
2682 count += pendingcnt [pri];
2683
2684 return count;
2685}
2686
2687void noinline
2688ev_invoke_pending (EV_P)
1289{ 2689{
1290 int pri; 2690 int pri;
1291 2691
1292 for (pri = NUMPRI; pri--; ) 2692 for (pri = NUMPRI; pri--; )
1293 while (pendingcnt [pri]) 2693 while (pendingcnt [pri])
1294 { 2694 {
1295 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2695 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1296 2696
1297 if (expect_true (p->w))
1298 {
1299 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1300
1301 p->w->pending = 0; 2697 p->w->pending = 0;
1302 EV_CB_INVOKE (p->w, p->events); 2698 EV_CB_INVOKE (p->w, p->events);
1303 } 2699 EV_FREQUENT_CHECK;
1304 } 2700 }
1305} 2701}
1306 2702
1307void inline_size
1308timers_reify (EV_P)
1309{
1310 while (timercnt && ((WT)timers [0])->at <= mn_now)
1311 {
1312 ev_timer *w = (ev_timer *)timers [0];
1313
1314 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1315
1316 /* first reschedule or stop timer */
1317 if (w->repeat)
1318 {
1319 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1320
1321 ((WT)w)->at += w->repeat;
1322 if (((WT)w)->at < mn_now)
1323 ((WT)w)->at = mn_now;
1324
1325 downheap (timers, timercnt, 0);
1326 }
1327 else
1328 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1329
1330 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1331 }
1332}
1333
1334#if EV_PERIODIC_ENABLE
1335void inline_size
1336periodics_reify (EV_P)
1337{
1338 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1339 {
1340 ev_periodic *w = (ev_periodic *)periodics [0];
1341
1342 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1343
1344 /* first reschedule or stop timer */
1345 if (w->reschedule_cb)
1346 {
1347 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1348 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1349 downheap (periodics, periodiccnt, 0);
1350 }
1351 else if (w->interval)
1352 {
1353 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1354 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1355 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1356 downheap (periodics, periodiccnt, 0);
1357 }
1358 else
1359 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1360
1361 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1362 }
1363}
1364
1365static void noinline
1366periodics_reschedule (EV_P)
1367{
1368 int i;
1369
1370 /* adjust periodics after time jump */
1371 for (i = 0; i < periodiccnt; ++i)
1372 {
1373 ev_periodic *w = (ev_periodic *)periodics [i];
1374
1375 if (w->reschedule_cb)
1376 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1377 else if (w->interval)
1378 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1379 }
1380
1381 /* now rebuild the heap */
1382 for (i = periodiccnt >> 1; i--; )
1383 downheap (periodics, periodiccnt, i);
1384}
1385#endif
1386
1387#if EV_IDLE_ENABLE 2703#if EV_IDLE_ENABLE
1388void inline_size 2704/* make idle watchers pending. this handles the "call-idle */
2705/* only when higher priorities are idle" logic */
2706inline_size void
1389idle_reify (EV_P) 2707idle_reify (EV_P)
1390{ 2708{
1391 if (expect_false (idleall)) 2709 if (expect_false (idleall))
1392 { 2710 {
1393 int pri; 2711 int pri;
… …
1405 } 2723 }
1406 } 2724 }
1407} 2725}
1408#endif 2726#endif
1409 2727
1410void inline_speed 2728/* make timers pending */
2729inline_size void
2730timers_reify (EV_P)
2731{
2732 EV_FREQUENT_CHECK;
2733
2734 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2735 {
2736 do
2737 {
2738 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2739
2740 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2741
2742 /* first reschedule or stop timer */
2743 if (w->repeat)
2744 {
2745 ev_at (w) += w->repeat;
2746 if (ev_at (w) < mn_now)
2747 ev_at (w) = mn_now;
2748
2749 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2750
2751 ANHE_at_cache (timers [HEAP0]);
2752 downheap (timers, timercnt, HEAP0);
2753 }
2754 else
2755 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2756
2757 EV_FREQUENT_CHECK;
2758 feed_reverse (EV_A_ (W)w);
2759 }
2760 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2761
2762 feed_reverse_done (EV_A_ EV_TIMER);
2763 }
2764}
2765
2766#if EV_PERIODIC_ENABLE
2767
2768static void noinline
2769periodic_recalc (EV_P_ ev_periodic *w)
2770{
2771 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2772 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2773
2774 /* the above almost always errs on the low side */
2775 while (at <= ev_rt_now)
2776 {
2777 ev_tstamp nat = at + w->interval;
2778
2779 /* when resolution fails us, we use ev_rt_now */
2780 if (expect_false (nat == at))
2781 {
2782 at = ev_rt_now;
2783 break;
2784 }
2785
2786 at = nat;
2787 }
2788
2789 ev_at (w) = at;
2790}
2791
2792/* make periodics pending */
2793inline_size void
2794periodics_reify (EV_P)
2795{
2796 EV_FREQUENT_CHECK;
2797
2798 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2799 {
2800 int feed_count = 0;
2801
2802 do
2803 {
2804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2805
2806 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2807
2808 /* first reschedule or stop timer */
2809 if (w->reschedule_cb)
2810 {
2811 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2812
2813 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2814
2815 ANHE_at_cache (periodics [HEAP0]);
2816 downheap (periodics, periodiccnt, HEAP0);
2817 }
2818 else if (w->interval)
2819 {
2820 periodic_recalc (EV_A_ w);
2821 ANHE_at_cache (periodics [HEAP0]);
2822 downheap (periodics, periodiccnt, HEAP0);
2823 }
2824 else
2825 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2826
2827 EV_FREQUENT_CHECK;
2828 feed_reverse (EV_A_ (W)w);
2829 }
2830 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2831
2832 feed_reverse_done (EV_A_ EV_PERIODIC);
2833 }
2834}
2835
2836/* simply recalculate all periodics */
2837/* TODO: maybe ensure that at least one event happens when jumping forward? */
2838static void noinline ecb_cold
2839periodics_reschedule (EV_P)
2840{
2841 int i;
2842
2843 /* adjust periodics after time jump */
2844 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2845 {
2846 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2847
2848 if (w->reschedule_cb)
2849 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2850 else if (w->interval)
2851 periodic_recalc (EV_A_ w);
2852
2853 ANHE_at_cache (periodics [i]);
2854 }
2855
2856 reheap (periodics, periodiccnt);
2857}
2858#endif
2859
2860/* adjust all timers by a given offset */
2861static void noinline ecb_cold
2862timers_reschedule (EV_P_ ev_tstamp adjust)
2863{
2864 int i;
2865
2866 for (i = 0; i < timercnt; ++i)
2867 {
2868 ANHE *he = timers + i + HEAP0;
2869 ANHE_w (*he)->at += adjust;
2870 ANHE_at_cache (*he);
2871 }
2872}
2873
2874/* fetch new monotonic and realtime times from the kernel */
2875/* also detect if there was a timejump, and act accordingly */
2876inline_speed void
1411time_update (EV_P_ ev_tstamp max_block) 2877time_update (EV_P_ ev_tstamp max_block)
1412{ 2878{
1413 int i;
1414
1415#if EV_USE_MONOTONIC 2879#if EV_USE_MONOTONIC
1416 if (expect_true (have_monotonic)) 2880 if (expect_true (have_monotonic))
1417 { 2881 {
2882 int i;
1418 ev_tstamp odiff = rtmn_diff; 2883 ev_tstamp odiff = rtmn_diff;
1419 2884
1420 mn_now = get_clock (); 2885 mn_now = get_clock ();
1421 2886
1422 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2887 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1438 * doesn't hurt either as we only do this on time-jumps or 2903 * doesn't hurt either as we only do this on time-jumps or
1439 * in the unlikely event of having been preempted here. 2904 * in the unlikely event of having been preempted here.
1440 */ 2905 */
1441 for (i = 4; --i; ) 2906 for (i = 4; --i; )
1442 { 2907 {
2908 ev_tstamp diff;
1443 rtmn_diff = ev_rt_now - mn_now; 2909 rtmn_diff = ev_rt_now - mn_now;
1444 2910
1445 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2911 diff = odiff - rtmn_diff;
2912
2913 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1446 return; /* all is well */ 2914 return; /* all is well */
1447 2915
1448 ev_rt_now = ev_time (); 2916 ev_rt_now = ev_time ();
1449 mn_now = get_clock (); 2917 mn_now = get_clock ();
1450 now_floor = mn_now; 2918 now_floor = mn_now;
1451 } 2919 }
1452 2920
2921 /* no timer adjustment, as the monotonic clock doesn't jump */
2922 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1453# if EV_PERIODIC_ENABLE 2923# if EV_PERIODIC_ENABLE
1454 periodics_reschedule (EV_A); 2924 periodics_reschedule (EV_A);
1455# endif 2925# endif
1456 /* no timer adjustment, as the monotonic clock doesn't jump */
1457 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1458 } 2926 }
1459 else 2927 else
1460#endif 2928#endif
1461 { 2929 {
1462 ev_rt_now = ev_time (); 2930 ev_rt_now = ev_time ();
1463 2931
1464 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2932 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1465 { 2933 {
2934 /* adjust timers. this is easy, as the offset is the same for all of them */
2935 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1466#if EV_PERIODIC_ENABLE 2936#if EV_PERIODIC_ENABLE
1467 periodics_reschedule (EV_A); 2937 periodics_reschedule (EV_A);
1468#endif 2938#endif
1469 /* adjust timers. this is easy, as the offset is the same for all of them */
1470 for (i = 0; i < timercnt; ++i)
1471 ((WT)timers [i])->at += ev_rt_now - mn_now;
1472 } 2939 }
1473 2940
1474 mn_now = ev_rt_now; 2941 mn_now = ev_rt_now;
1475 } 2942 }
1476} 2943}
1477 2944
1478void 2945int
1479ev_ref (EV_P)
1480{
1481 ++activecnt;
1482}
1483
1484void
1485ev_unref (EV_P)
1486{
1487 --activecnt;
1488}
1489
1490static int loop_done;
1491
1492void
1493ev_loop (EV_P_ int flags) 2946ev_run (EV_P_ int flags)
1494{ 2947{
1495 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2948#if EV_FEATURE_API
1496 ? EVUNLOOP_ONE 2949 ++loop_depth;
1497 : EVUNLOOP_CANCEL; 2950#endif
1498 2951
2952 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2953
2954 loop_done = EVBREAK_CANCEL;
2955
1499 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2956 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1500 2957
1501 do 2958 do
1502 { 2959 {
2960#if EV_VERIFY >= 2
2961 ev_verify (EV_A);
2962#endif
2963
1503#ifndef _WIN32 2964#ifndef _WIN32
1504 if (expect_false (curpid)) /* penalise the forking check even more */ 2965 if (expect_false (curpid)) /* penalise the forking check even more */
1505 if (expect_false (getpid () != curpid)) 2966 if (expect_false (getpid () != curpid))
1506 { 2967 {
1507 curpid = getpid (); 2968 curpid = getpid ();
… …
1513 /* we might have forked, so queue fork handlers */ 2974 /* we might have forked, so queue fork handlers */
1514 if (expect_false (postfork)) 2975 if (expect_false (postfork))
1515 if (forkcnt) 2976 if (forkcnt)
1516 { 2977 {
1517 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2978 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1518 call_pending (EV_A); 2979 EV_INVOKE_PENDING;
1519 } 2980 }
1520#endif 2981#endif
1521 2982
2983#if EV_PREPARE_ENABLE
1522 /* queue prepare watchers (and execute them) */ 2984 /* queue prepare watchers (and execute them) */
1523 if (expect_false (preparecnt)) 2985 if (expect_false (preparecnt))
1524 { 2986 {
1525 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2987 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1526 call_pending (EV_A); 2988 EV_INVOKE_PENDING;
1527 } 2989 }
2990#endif
1528 2991
1529 if (expect_false (!activecnt)) 2992 if (expect_false (loop_done))
1530 break; 2993 break;
1531 2994
1532 /* we might have forked, so reify kernel state if necessary */ 2995 /* we might have forked, so reify kernel state if necessary */
1533 if (expect_false (postfork)) 2996 if (expect_false (postfork))
1534 loop_fork (EV_A); 2997 loop_fork (EV_A);
… …
1539 /* calculate blocking time */ 3002 /* calculate blocking time */
1540 { 3003 {
1541 ev_tstamp waittime = 0.; 3004 ev_tstamp waittime = 0.;
1542 ev_tstamp sleeptime = 0.; 3005 ev_tstamp sleeptime = 0.;
1543 3006
3007 /* remember old timestamp for io_blocktime calculation */
3008 ev_tstamp prev_mn_now = mn_now;
3009
3010 /* update time to cancel out callback processing overhead */
3011 time_update (EV_A_ 1e100);
3012
3013 /* from now on, we want a pipe-wake-up */
3014 pipe_write_wanted = 1;
3015
3016 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3017
1544 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3018 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1545 { 3019 {
1546 /* update time to cancel out callback processing overhead */
1547 time_update (EV_A_ 1e100);
1548
1549 waittime = MAX_BLOCKTIME; 3020 waittime = MAX_BLOCKTIME;
1550 3021
1551 if (timercnt) 3022 if (timercnt)
1552 { 3023 {
1553 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3024 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1554 if (waittime > to) waittime = to; 3025 if (waittime > to) waittime = to;
1555 } 3026 }
1556 3027
1557#if EV_PERIODIC_ENABLE 3028#if EV_PERIODIC_ENABLE
1558 if (periodiccnt) 3029 if (periodiccnt)
1559 { 3030 {
1560 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3031 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1561 if (waittime > to) waittime = to; 3032 if (waittime > to) waittime = to;
1562 } 3033 }
1563#endif 3034#endif
1564 3035
3036 /* don't let timeouts decrease the waittime below timeout_blocktime */
1565 if (expect_false (waittime < timeout_blocktime)) 3037 if (expect_false (waittime < timeout_blocktime))
1566 waittime = timeout_blocktime; 3038 waittime = timeout_blocktime;
1567 3039
1568 sleeptime = waittime - backend_fudge; 3040 /* at this point, we NEED to wait, so we have to ensure */
3041 /* to pass a minimum nonzero value to the backend */
3042 if (expect_false (waittime < backend_mintime))
3043 waittime = backend_mintime;
1569 3044
3045 /* extra check because io_blocktime is commonly 0 */
1570 if (expect_true (sleeptime > io_blocktime)) 3046 if (expect_false (io_blocktime))
1571 sleeptime = io_blocktime;
1572
1573 if (sleeptime)
1574 { 3047 {
3048 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3049
3050 if (sleeptime > waittime - backend_mintime)
3051 sleeptime = waittime - backend_mintime;
3052
3053 if (expect_true (sleeptime > 0.))
3054 {
1575 ev_sleep (sleeptime); 3055 ev_sleep (sleeptime);
1576 waittime -= sleeptime; 3056 waittime -= sleeptime;
3057 }
1577 } 3058 }
1578 } 3059 }
1579 3060
3061#if EV_FEATURE_API
1580 ++loop_count; 3062 ++loop_count;
3063#endif
3064 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1581 backend_poll (EV_A_ waittime); 3065 backend_poll (EV_A_ waittime);
3066 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3067
3068 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3069
3070 if (pipe_write_skipped)
3071 {
3072 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3073 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3074 }
3075
1582 3076
1583 /* update ev_rt_now, do magic */ 3077 /* update ev_rt_now, do magic */
1584 time_update (EV_A_ waittime + sleeptime); 3078 time_update (EV_A_ waittime + sleeptime);
1585 } 3079 }
1586 3080
… …
1593#if EV_IDLE_ENABLE 3087#if EV_IDLE_ENABLE
1594 /* queue idle watchers unless other events are pending */ 3088 /* queue idle watchers unless other events are pending */
1595 idle_reify (EV_A); 3089 idle_reify (EV_A);
1596#endif 3090#endif
1597 3091
3092#if EV_CHECK_ENABLE
1598 /* queue check watchers, to be executed first */ 3093 /* queue check watchers, to be executed first */
1599 if (expect_false (checkcnt)) 3094 if (expect_false (checkcnt))
1600 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3095 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3096#endif
1601 3097
1602 call_pending (EV_A); 3098 EV_INVOKE_PENDING;
1603
1604 } 3099 }
1605 while (expect_true (activecnt && !loop_done)); 3100 while (expect_true (
3101 activecnt
3102 && !loop_done
3103 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3104 ));
1606 3105
1607 if (loop_done == EVUNLOOP_ONE) 3106 if (loop_done == EVBREAK_ONE)
1608 loop_done = EVUNLOOP_CANCEL; 3107 loop_done = EVBREAK_CANCEL;
3108
3109#if EV_FEATURE_API
3110 --loop_depth;
3111#endif
3112
3113 return activecnt;
1609} 3114}
1610 3115
1611void 3116void
1612ev_unloop (EV_P_ int how) 3117ev_break (EV_P_ int how) EV_THROW
1613{ 3118{
1614 loop_done = how; 3119 loop_done = how;
1615} 3120}
1616 3121
3122void
3123ev_ref (EV_P) EV_THROW
3124{
3125 ++activecnt;
3126}
3127
3128void
3129ev_unref (EV_P) EV_THROW
3130{
3131 --activecnt;
3132}
3133
3134void
3135ev_now_update (EV_P) EV_THROW
3136{
3137 time_update (EV_A_ 1e100);
3138}
3139
3140void
3141ev_suspend (EV_P) EV_THROW
3142{
3143 ev_now_update (EV_A);
3144}
3145
3146void
3147ev_resume (EV_P) EV_THROW
3148{
3149 ev_tstamp mn_prev = mn_now;
3150
3151 ev_now_update (EV_A);
3152 timers_reschedule (EV_A_ mn_now - mn_prev);
3153#if EV_PERIODIC_ENABLE
3154 /* TODO: really do this? */
3155 periodics_reschedule (EV_A);
3156#endif
3157}
3158
1617/*****************************************************************************/ 3159/*****************************************************************************/
3160/* singly-linked list management, used when the expected list length is short */
1618 3161
1619void inline_size 3162inline_size void
1620wlist_add (WL *head, WL elem) 3163wlist_add (WL *head, WL elem)
1621{ 3164{
1622 elem->next = *head; 3165 elem->next = *head;
1623 *head = elem; 3166 *head = elem;
1624} 3167}
1625 3168
1626void inline_size 3169inline_size void
1627wlist_del (WL *head, WL elem) 3170wlist_del (WL *head, WL elem)
1628{ 3171{
1629 while (*head) 3172 while (*head)
1630 { 3173 {
1631 if (*head == elem) 3174 if (expect_true (*head == elem))
1632 { 3175 {
1633 *head = elem->next; 3176 *head = elem->next;
1634 return; 3177 break;
1635 } 3178 }
1636 3179
1637 head = &(*head)->next; 3180 head = &(*head)->next;
1638 } 3181 }
1639} 3182}
1640 3183
1641void inline_speed 3184/* internal, faster, version of ev_clear_pending */
3185inline_speed void
1642clear_pending (EV_P_ W w) 3186clear_pending (EV_P_ W w)
1643{ 3187{
1644 if (w->pending) 3188 if (w->pending)
1645 { 3189 {
1646 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3190 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1647 w->pending = 0; 3191 w->pending = 0;
1648 } 3192 }
1649} 3193}
1650 3194
1651int 3195int
1652ev_clear_pending (EV_P_ void *w) 3196ev_clear_pending (EV_P_ void *w) EV_THROW
1653{ 3197{
1654 W w_ = (W)w; 3198 W w_ = (W)w;
1655 int pending = w_->pending; 3199 int pending = w_->pending;
1656 3200
1657 if (expect_true (pending)) 3201 if (expect_true (pending))
1658 { 3202 {
1659 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3203 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3204 p->w = (W)&pending_w;
1660 w_->pending = 0; 3205 w_->pending = 0;
1661 p->w = 0;
1662 return p->events; 3206 return p->events;
1663 } 3207 }
1664 else 3208 else
1665 return 0; 3209 return 0;
1666} 3210}
1667 3211
1668void inline_size 3212inline_size void
1669pri_adjust (EV_P_ W w) 3213pri_adjust (EV_P_ W w)
1670{ 3214{
1671 int pri = w->priority; 3215 int pri = ev_priority (w);
1672 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3216 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1673 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3217 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1674 w->priority = pri; 3218 ev_set_priority (w, pri);
1675} 3219}
1676 3220
1677void inline_speed 3221inline_speed void
1678ev_start (EV_P_ W w, int active) 3222ev_start (EV_P_ W w, int active)
1679{ 3223{
1680 pri_adjust (EV_A_ w); 3224 pri_adjust (EV_A_ w);
1681 w->active = active; 3225 w->active = active;
1682 ev_ref (EV_A); 3226 ev_ref (EV_A);
1683} 3227}
1684 3228
1685void inline_size 3229inline_size void
1686ev_stop (EV_P_ W w) 3230ev_stop (EV_P_ W w)
1687{ 3231{
1688 ev_unref (EV_A); 3232 ev_unref (EV_A);
1689 w->active = 0; 3233 w->active = 0;
1690} 3234}
1691 3235
1692/*****************************************************************************/ 3236/*****************************************************************************/
1693 3237
1694void noinline 3238void noinline
1695ev_io_start (EV_P_ ev_io *w) 3239ev_io_start (EV_P_ ev_io *w) EV_THROW
1696{ 3240{
1697 int fd = w->fd; 3241 int fd = w->fd;
1698 3242
1699 if (expect_false (ev_is_active (w))) 3243 if (expect_false (ev_is_active (w)))
1700 return; 3244 return;
1701 3245
1702 assert (("ev_io_start called with negative fd", fd >= 0)); 3246 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3247 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3248
3249 EV_FREQUENT_CHECK;
1703 3250
1704 ev_start (EV_A_ (W)w, 1); 3251 ev_start (EV_A_ (W)w, 1);
1705 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3252 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1706 wlist_add (&anfds[fd].head, (WL)w); 3253 wlist_add (&anfds[fd].head, (WL)w);
1707 3254
1708 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3255 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1709 w->events &= ~EV_IOFDSET; 3256 w->events &= ~EV__IOFDSET;
3257
3258 EV_FREQUENT_CHECK;
1710} 3259}
1711 3260
1712void noinline 3261void noinline
1713ev_io_stop (EV_P_ ev_io *w) 3262ev_io_stop (EV_P_ ev_io *w) EV_THROW
1714{ 3263{
1715 clear_pending (EV_A_ (W)w); 3264 clear_pending (EV_A_ (W)w);
1716 if (expect_false (!ev_is_active (w))) 3265 if (expect_false (!ev_is_active (w)))
1717 return; 3266 return;
1718 3267
1719 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3268 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3269
3270 EV_FREQUENT_CHECK;
1720 3271
1721 wlist_del (&anfds[w->fd].head, (WL)w); 3272 wlist_del (&anfds[w->fd].head, (WL)w);
1722 ev_stop (EV_A_ (W)w); 3273 ev_stop (EV_A_ (W)w);
1723 3274
1724 fd_change (EV_A_ w->fd, 1); 3275 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3276
3277 EV_FREQUENT_CHECK;
1725} 3278}
1726 3279
1727void noinline 3280void noinline
1728ev_timer_start (EV_P_ ev_timer *w) 3281ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1729{ 3282{
1730 if (expect_false (ev_is_active (w))) 3283 if (expect_false (ev_is_active (w)))
1731 return; 3284 return;
1732 3285
1733 ((WT)w)->at += mn_now; 3286 ev_at (w) += mn_now;
1734 3287
1735 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3288 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1736 3289
3290 EV_FREQUENT_CHECK;
3291
3292 ++timercnt;
1737 ev_start (EV_A_ (W)w, ++timercnt); 3293 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1738 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3294 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1739 timers [timercnt - 1] = (WT)w; 3295 ANHE_w (timers [ev_active (w)]) = (WT)w;
1740 upheap (timers, timercnt - 1); 3296 ANHE_at_cache (timers [ev_active (w)]);
3297 upheap (timers, ev_active (w));
1741 3298
3299 EV_FREQUENT_CHECK;
3300
1742 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3301 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1743} 3302}
1744 3303
1745void noinline 3304void noinline
1746ev_timer_stop (EV_P_ ev_timer *w) 3305ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1747{ 3306{
1748 clear_pending (EV_A_ (W)w); 3307 clear_pending (EV_A_ (W)w);
1749 if (expect_false (!ev_is_active (w))) 3308 if (expect_false (!ev_is_active (w)))
1750 return; 3309 return;
1751 3310
1752 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3311 EV_FREQUENT_CHECK;
1753 3312
1754 { 3313 {
1755 int active = ((W)w)->active; 3314 int active = ev_active (w);
1756 3315
3316 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3317
3318 --timercnt;
3319
1757 if (expect_true (--active < --timercnt)) 3320 if (expect_true (active < timercnt + HEAP0))
1758 { 3321 {
1759 timers [active] = timers [timercnt]; 3322 timers [active] = timers [timercnt + HEAP0];
1760 adjustheap (timers, timercnt, active); 3323 adjustheap (timers, timercnt, active);
1761 } 3324 }
1762 } 3325 }
1763 3326
1764 ((WT)w)->at -= mn_now; 3327 ev_at (w) -= mn_now;
1765 3328
1766 ev_stop (EV_A_ (W)w); 3329 ev_stop (EV_A_ (W)w);
3330
3331 EV_FREQUENT_CHECK;
1767} 3332}
1768 3333
1769void noinline 3334void noinline
1770ev_timer_again (EV_P_ ev_timer *w) 3335ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1771{ 3336{
3337 EV_FREQUENT_CHECK;
3338
3339 clear_pending (EV_A_ (W)w);
3340
1772 if (ev_is_active (w)) 3341 if (ev_is_active (w))
1773 { 3342 {
1774 if (w->repeat) 3343 if (w->repeat)
1775 { 3344 {
1776 ((WT)w)->at = mn_now + w->repeat; 3345 ev_at (w) = mn_now + w->repeat;
3346 ANHE_at_cache (timers [ev_active (w)]);
1777 adjustheap (timers, timercnt, ((W)w)->active - 1); 3347 adjustheap (timers, timercnt, ev_active (w));
1778 } 3348 }
1779 else 3349 else
1780 ev_timer_stop (EV_A_ w); 3350 ev_timer_stop (EV_A_ w);
1781 } 3351 }
1782 else if (w->repeat) 3352 else if (w->repeat)
1783 { 3353 {
1784 w->at = w->repeat; 3354 ev_at (w) = w->repeat;
1785 ev_timer_start (EV_A_ w); 3355 ev_timer_start (EV_A_ w);
1786 } 3356 }
3357
3358 EV_FREQUENT_CHECK;
3359}
3360
3361ev_tstamp
3362ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3363{
3364 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1787} 3365}
1788 3366
1789#if EV_PERIODIC_ENABLE 3367#if EV_PERIODIC_ENABLE
1790void noinline 3368void noinline
1791ev_periodic_start (EV_P_ ev_periodic *w) 3369ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1792{ 3370{
1793 if (expect_false (ev_is_active (w))) 3371 if (expect_false (ev_is_active (w)))
1794 return; 3372 return;
1795 3373
1796 if (w->reschedule_cb) 3374 if (w->reschedule_cb)
1797 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3375 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1798 else if (w->interval) 3376 else if (w->interval)
1799 { 3377 {
1800 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3378 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1801 /* this formula differs from the one in periodic_reify because we do not always round up */ 3379 periodic_recalc (EV_A_ w);
1802 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1803 } 3380 }
1804 else 3381 else
1805 ((WT)w)->at = w->offset; 3382 ev_at (w) = w->offset;
1806 3383
3384 EV_FREQUENT_CHECK;
3385
3386 ++periodiccnt;
1807 ev_start (EV_A_ (W)w, ++periodiccnt); 3387 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1808 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3388 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1809 periodics [periodiccnt - 1] = (WT)w; 3389 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1810 upheap (periodics, periodiccnt - 1); 3390 ANHE_at_cache (periodics [ev_active (w)]);
3391 upheap (periodics, ev_active (w));
1811 3392
3393 EV_FREQUENT_CHECK;
3394
1812 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3395 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1813} 3396}
1814 3397
1815void noinline 3398void noinline
1816ev_periodic_stop (EV_P_ ev_periodic *w) 3399ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1817{ 3400{
1818 clear_pending (EV_A_ (W)w); 3401 clear_pending (EV_A_ (W)w);
1819 if (expect_false (!ev_is_active (w))) 3402 if (expect_false (!ev_is_active (w)))
1820 return; 3403 return;
1821 3404
1822 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3405 EV_FREQUENT_CHECK;
1823 3406
1824 { 3407 {
1825 int active = ((W)w)->active; 3408 int active = ev_active (w);
1826 3409
3410 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3411
3412 --periodiccnt;
3413
1827 if (expect_true (--active < --periodiccnt)) 3414 if (expect_true (active < periodiccnt + HEAP0))
1828 { 3415 {
1829 periodics [active] = periodics [periodiccnt]; 3416 periodics [active] = periodics [periodiccnt + HEAP0];
1830 adjustheap (periodics, periodiccnt, active); 3417 adjustheap (periodics, periodiccnt, active);
1831 } 3418 }
1832 } 3419 }
1833 3420
1834 ev_stop (EV_A_ (W)w); 3421 ev_stop (EV_A_ (W)w);
3422
3423 EV_FREQUENT_CHECK;
1835} 3424}
1836 3425
1837void noinline 3426void noinline
1838ev_periodic_again (EV_P_ ev_periodic *w) 3427ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1839{ 3428{
1840 /* TODO: use adjustheap and recalculation */ 3429 /* TODO: use adjustheap and recalculation */
1841 ev_periodic_stop (EV_A_ w); 3430 ev_periodic_stop (EV_A_ w);
1842 ev_periodic_start (EV_A_ w); 3431 ev_periodic_start (EV_A_ w);
1843} 3432}
… …
1845 3434
1846#ifndef SA_RESTART 3435#ifndef SA_RESTART
1847# define SA_RESTART 0 3436# define SA_RESTART 0
1848#endif 3437#endif
1849 3438
3439#if EV_SIGNAL_ENABLE
3440
1850void noinline 3441void noinline
1851ev_signal_start (EV_P_ ev_signal *w) 3442ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1852{ 3443{
1853#if EV_MULTIPLICITY
1854 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1855#endif
1856 if (expect_false (ev_is_active (w))) 3444 if (expect_false (ev_is_active (w)))
1857 return; 3445 return;
1858 3446
1859 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3447 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1860 3448
3449#if EV_MULTIPLICITY
3450 assert (("libev: a signal must not be attached to two different loops",
3451 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3452
3453 signals [w->signum - 1].loop = EV_A;
3454#endif
3455
3456 EV_FREQUENT_CHECK;
3457
3458#if EV_USE_SIGNALFD
3459 if (sigfd == -2)
1861 { 3460 {
1862#ifndef _WIN32 3461 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1863 sigset_t full, prev; 3462 if (sigfd < 0 && errno == EINVAL)
1864 sigfillset (&full); 3463 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1865 sigprocmask (SIG_SETMASK, &full, &prev);
1866#endif
1867 3464
1868 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3465 if (sigfd >= 0)
3466 {
3467 fd_intern (sigfd); /* doing it twice will not hurt */
1869 3468
1870#ifndef _WIN32 3469 sigemptyset (&sigfd_set);
1871 sigprocmask (SIG_SETMASK, &prev, 0); 3470
1872#endif 3471 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3472 ev_set_priority (&sigfd_w, EV_MAXPRI);
3473 ev_io_start (EV_A_ &sigfd_w);
3474 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3475 }
1873 } 3476 }
3477
3478 if (sigfd >= 0)
3479 {
3480 /* TODO: check .head */
3481 sigaddset (&sigfd_set, w->signum);
3482 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3483
3484 signalfd (sigfd, &sigfd_set, 0);
3485 }
3486#endif
1874 3487
1875 ev_start (EV_A_ (W)w, 1); 3488 ev_start (EV_A_ (W)w, 1);
1876 wlist_add (&signals [w->signum - 1].head, (WL)w); 3489 wlist_add (&signals [w->signum - 1].head, (WL)w);
1877 3490
1878 if (!((WL)w)->next) 3491 if (!((WL)w)->next)
3492# if EV_USE_SIGNALFD
3493 if (sigfd < 0) /*TODO*/
3494# endif
1879 { 3495 {
1880#if _WIN32 3496# ifdef _WIN32
3497 evpipe_init (EV_A);
3498
1881 signal (w->signum, sighandler); 3499 signal (w->signum, ev_sighandler);
1882#else 3500# else
1883 struct sigaction sa; 3501 struct sigaction sa;
3502
3503 evpipe_init (EV_A);
3504
1884 sa.sa_handler = sighandler; 3505 sa.sa_handler = ev_sighandler;
1885 sigfillset (&sa.sa_mask); 3506 sigfillset (&sa.sa_mask);
1886 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3507 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1887 sigaction (w->signum, &sa, 0); 3508 sigaction (w->signum, &sa, 0);
3509
3510 if (origflags & EVFLAG_NOSIGMASK)
3511 {
3512 sigemptyset (&sa.sa_mask);
3513 sigaddset (&sa.sa_mask, w->signum);
3514 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3515 }
1888#endif 3516#endif
1889 } 3517 }
3518
3519 EV_FREQUENT_CHECK;
1890} 3520}
1891 3521
1892void noinline 3522void noinline
1893ev_signal_stop (EV_P_ ev_signal *w) 3523ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1894{ 3524{
1895 clear_pending (EV_A_ (W)w); 3525 clear_pending (EV_A_ (W)w);
1896 if (expect_false (!ev_is_active (w))) 3526 if (expect_false (!ev_is_active (w)))
1897 return; 3527 return;
1898 3528
3529 EV_FREQUENT_CHECK;
3530
1899 wlist_del (&signals [w->signum - 1].head, (WL)w); 3531 wlist_del (&signals [w->signum - 1].head, (WL)w);
1900 ev_stop (EV_A_ (W)w); 3532 ev_stop (EV_A_ (W)w);
1901 3533
1902 if (!signals [w->signum - 1].head) 3534 if (!signals [w->signum - 1].head)
3535 {
3536#if EV_MULTIPLICITY
3537 signals [w->signum - 1].loop = 0; /* unattach from signal */
3538#endif
3539#if EV_USE_SIGNALFD
3540 if (sigfd >= 0)
3541 {
3542 sigset_t ss;
3543
3544 sigemptyset (&ss);
3545 sigaddset (&ss, w->signum);
3546 sigdelset (&sigfd_set, w->signum);
3547
3548 signalfd (sigfd, &sigfd_set, 0);
3549 sigprocmask (SIG_UNBLOCK, &ss, 0);
3550 }
3551 else
3552#endif
1903 signal (w->signum, SIG_DFL); 3553 signal (w->signum, SIG_DFL);
3554 }
3555
3556 EV_FREQUENT_CHECK;
1904} 3557}
3558
3559#endif
3560
3561#if EV_CHILD_ENABLE
1905 3562
1906void 3563void
1907ev_child_start (EV_P_ ev_child *w) 3564ev_child_start (EV_P_ ev_child *w) EV_THROW
1908{ 3565{
1909#if EV_MULTIPLICITY 3566#if EV_MULTIPLICITY
1910 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3567 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1911#endif 3568#endif
1912 if (expect_false (ev_is_active (w))) 3569 if (expect_false (ev_is_active (w)))
1913 return; 3570 return;
1914 3571
3572 EV_FREQUENT_CHECK;
3573
1915 ev_start (EV_A_ (W)w, 1); 3574 ev_start (EV_A_ (W)w, 1);
1916 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3575 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3576
3577 EV_FREQUENT_CHECK;
1917} 3578}
1918 3579
1919void 3580void
1920ev_child_stop (EV_P_ ev_child *w) 3581ev_child_stop (EV_P_ ev_child *w) EV_THROW
1921{ 3582{
1922 clear_pending (EV_A_ (W)w); 3583 clear_pending (EV_A_ (W)w);
1923 if (expect_false (!ev_is_active (w))) 3584 if (expect_false (!ev_is_active (w)))
1924 return; 3585 return;
1925 3586
3587 EV_FREQUENT_CHECK;
3588
1926 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3589 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1927 ev_stop (EV_A_ (W)w); 3590 ev_stop (EV_A_ (W)w);
3591
3592 EV_FREQUENT_CHECK;
1928} 3593}
3594
3595#endif
1929 3596
1930#if EV_STAT_ENABLE 3597#if EV_STAT_ENABLE
1931 3598
1932# ifdef _WIN32 3599# ifdef _WIN32
1933# undef lstat 3600# undef lstat
1934# define lstat(a,b) _stati64 (a,b) 3601# define lstat(a,b) _stati64 (a,b)
1935# endif 3602# endif
1936 3603
1937#define DEF_STAT_INTERVAL 5.0074891 3604#define DEF_STAT_INTERVAL 5.0074891
3605#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1938#define MIN_STAT_INTERVAL 0.1074891 3606#define MIN_STAT_INTERVAL 0.1074891
1939 3607
1940static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3608static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1941 3609
1942#if EV_USE_INOTIFY 3610#if EV_USE_INOTIFY
1943# define EV_INOTIFY_BUFSIZE 8192 3611
3612/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3613# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1944 3614
1945static void noinline 3615static void noinline
1946infy_add (EV_P_ ev_stat *w) 3616infy_add (EV_P_ ev_stat *w)
1947{ 3617{
1948 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); 3618 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);
1949 3619
1950 if (w->wd < 0) 3620 if (w->wd >= 0)
3621 {
3622 struct statfs sfs;
3623
3624 /* now local changes will be tracked by inotify, but remote changes won't */
3625 /* unless the filesystem is known to be local, we therefore still poll */
3626 /* also do poll on <2.6.25, but with normal frequency */
3627
3628 if (!fs_2625)
3629 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3630 else if (!statfs (w->path, &sfs)
3631 && (sfs.f_type == 0x1373 /* devfs */
3632 || sfs.f_type == 0xEF53 /* ext2/3 */
3633 || sfs.f_type == 0x3153464a /* jfs */
3634 || sfs.f_type == 0x52654973 /* reiser3 */
3635 || sfs.f_type == 0x01021994 /* tempfs */
3636 || sfs.f_type == 0x58465342 /* xfs */))
3637 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3638 else
3639 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1951 { 3640 }
1952 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3641 else
3642 {
3643 /* can't use inotify, continue to stat */
3644 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1953 3645
1954 /* monitor some parent directory for speedup hints */ 3646 /* if path is not there, monitor some parent directory for speedup hints */
3647 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3648 /* but an efficiency issue only */
1955 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3649 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1956 { 3650 {
1957 char path [4096]; 3651 char path [4096];
1958 strcpy (path, w->path); 3652 strcpy (path, w->path);
1959 3653
… …
1962 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3656 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1963 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3657 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1964 3658
1965 char *pend = strrchr (path, '/'); 3659 char *pend = strrchr (path, '/');
1966 3660
1967 if (!pend) 3661 if (!pend || pend == path)
1968 break; /* whoops, no '/', complain to your admin */ 3662 break;
1969 3663
1970 *pend = 0; 3664 *pend = 0;
1971 w->wd = inotify_add_watch (fs_fd, path, mask); 3665 w->wd = inotify_add_watch (fs_fd, path, mask);
1972 } 3666 }
1973 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3667 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1974 } 3668 }
1975 } 3669 }
1976 else
1977 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1978 3670
1979 if (w->wd >= 0) 3671 if (w->wd >= 0)
1980 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3672 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3673
3674 /* now re-arm timer, if required */
3675 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3676 ev_timer_again (EV_A_ &w->timer);
3677 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1981} 3678}
1982 3679
1983static void noinline 3680static void noinline
1984infy_del (EV_P_ ev_stat *w) 3681infy_del (EV_P_ ev_stat *w)
1985{ 3682{
… …
1988 3685
1989 if (wd < 0) 3686 if (wd < 0)
1990 return; 3687 return;
1991 3688
1992 w->wd = -2; 3689 w->wd = -2;
1993 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3690 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1994 wlist_del (&fs_hash [slot].head, (WL)w); 3691 wlist_del (&fs_hash [slot].head, (WL)w);
1995 3692
1996 /* remove this watcher, if others are watching it, they will rearm */ 3693 /* remove this watcher, if others are watching it, they will rearm */
1997 inotify_rm_watch (fs_fd, wd); 3694 inotify_rm_watch (fs_fd, wd);
1998} 3695}
1999 3696
2000static void noinline 3697static void noinline
2001infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3698infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2002{ 3699{
2003 if (slot < 0) 3700 if (slot < 0)
2004 /* overflow, need to check for all hahs slots */ 3701 /* overflow, need to check for all hash slots */
2005 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3702 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2006 infy_wd (EV_A_ slot, wd, ev); 3703 infy_wd (EV_A_ slot, wd, ev);
2007 else 3704 else
2008 { 3705 {
2009 WL w_; 3706 WL w_;
2010 3707
2011 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3708 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2012 { 3709 {
2013 ev_stat *w = (ev_stat *)w_; 3710 ev_stat *w = (ev_stat *)w_;
2014 w_ = w_->next; /* lets us remove this watcher and all before it */ 3711 w_ = w_->next; /* lets us remove this watcher and all before it */
2015 3712
2016 if (w->wd == wd || wd == -1) 3713 if (w->wd == wd || wd == -1)
2017 { 3714 {
2018 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3715 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2019 { 3716 {
3717 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2020 w->wd = -1; 3718 w->wd = -1;
2021 infy_add (EV_A_ w); /* re-add, no matter what */ 3719 infy_add (EV_A_ w); /* re-add, no matter what */
2022 } 3720 }
2023 3721
2024 stat_timer_cb (EV_A_ &w->timer, 0); 3722 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2029 3727
2030static void 3728static void
2031infy_cb (EV_P_ ev_io *w, int revents) 3729infy_cb (EV_P_ ev_io *w, int revents)
2032{ 3730{
2033 char buf [EV_INOTIFY_BUFSIZE]; 3731 char buf [EV_INOTIFY_BUFSIZE];
2034 struct inotify_event *ev = (struct inotify_event *)buf;
2035 int ofs; 3732 int ofs;
2036 int len = read (fs_fd, buf, sizeof (buf)); 3733 int len = read (fs_fd, buf, sizeof (buf));
2037 3734
2038 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3735 for (ofs = 0; ofs < len; )
3736 {
3737 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2039 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3738 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3739 ofs += sizeof (struct inotify_event) + ev->len;
3740 }
2040} 3741}
2041 3742
2042void inline_size 3743inline_size void ecb_cold
3744ev_check_2625 (EV_P)
3745{
3746 /* kernels < 2.6.25 are borked
3747 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3748 */
3749 if (ev_linux_version () < 0x020619)
3750 return;
3751
3752 fs_2625 = 1;
3753}
3754
3755inline_size int
3756infy_newfd (void)
3757{
3758#if defined IN_CLOEXEC && defined IN_NONBLOCK
3759 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3760 if (fd >= 0)
3761 return fd;
3762#endif
3763 return inotify_init ();
3764}
3765
3766inline_size void
2043infy_init (EV_P) 3767infy_init (EV_P)
2044{ 3768{
2045 if (fs_fd != -2) 3769 if (fs_fd != -2)
2046 return; 3770 return;
2047 3771
3772 fs_fd = -1;
3773
3774 ev_check_2625 (EV_A);
3775
2048 fs_fd = inotify_init (); 3776 fs_fd = infy_newfd ();
2049 3777
2050 if (fs_fd >= 0) 3778 if (fs_fd >= 0)
2051 { 3779 {
3780 fd_intern (fs_fd);
2052 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3781 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2053 ev_set_priority (&fs_w, EV_MAXPRI); 3782 ev_set_priority (&fs_w, EV_MAXPRI);
2054 ev_io_start (EV_A_ &fs_w); 3783 ev_io_start (EV_A_ &fs_w);
3784 ev_unref (EV_A);
2055 } 3785 }
2056} 3786}
2057 3787
2058void inline_size 3788inline_size void
2059infy_fork (EV_P) 3789infy_fork (EV_P)
2060{ 3790{
2061 int slot; 3791 int slot;
2062 3792
2063 if (fs_fd < 0) 3793 if (fs_fd < 0)
2064 return; 3794 return;
2065 3795
3796 ev_ref (EV_A);
3797 ev_io_stop (EV_A_ &fs_w);
2066 close (fs_fd); 3798 close (fs_fd);
2067 fs_fd = inotify_init (); 3799 fs_fd = infy_newfd ();
2068 3800
3801 if (fs_fd >= 0)
3802 {
3803 fd_intern (fs_fd);
3804 ev_io_set (&fs_w, fs_fd, EV_READ);
3805 ev_io_start (EV_A_ &fs_w);
3806 ev_unref (EV_A);
3807 }
3808
2069 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3809 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2070 { 3810 {
2071 WL w_ = fs_hash [slot].head; 3811 WL w_ = fs_hash [slot].head;
2072 fs_hash [slot].head = 0; 3812 fs_hash [slot].head = 0;
2073 3813
2074 while (w_) 3814 while (w_)
… …
2079 w->wd = -1; 3819 w->wd = -1;
2080 3820
2081 if (fs_fd >= 0) 3821 if (fs_fd >= 0)
2082 infy_add (EV_A_ w); /* re-add, no matter what */ 3822 infy_add (EV_A_ w); /* re-add, no matter what */
2083 else 3823 else
3824 {
3825 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3826 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2084 ev_timer_start (EV_A_ &w->timer); 3827 ev_timer_again (EV_A_ &w->timer);
3828 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3829 }
2085 } 3830 }
2086
2087 } 3831 }
2088} 3832}
2089 3833
3834#endif
3835
3836#ifdef _WIN32
3837# define EV_LSTAT(p,b) _stati64 (p, b)
3838#else
3839# define EV_LSTAT(p,b) lstat (p, b)
2090#endif 3840#endif
2091 3841
2092void 3842void
2093ev_stat_stat (EV_P_ ev_stat *w) 3843ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2094{ 3844{
2095 if (lstat (w->path, &w->attr) < 0) 3845 if (lstat (w->path, &w->attr) < 0)
2096 w->attr.st_nlink = 0; 3846 w->attr.st_nlink = 0;
2097 else if (!w->attr.st_nlink) 3847 else if (!w->attr.st_nlink)
2098 w->attr.st_nlink = 1; 3848 w->attr.st_nlink = 1;
… …
2101static void noinline 3851static void noinline
2102stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3852stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2103{ 3853{
2104 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3854 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2105 3855
2106 /* we copy this here each the time so that */ 3856 ev_statdata prev = w->attr;
2107 /* prev has the old value when the callback gets invoked */
2108 w->prev = w->attr;
2109 ev_stat_stat (EV_A_ w); 3857 ev_stat_stat (EV_A_ w);
2110 3858
2111 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3859 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2112 if ( 3860 if (
2113 w->prev.st_dev != w->attr.st_dev 3861 prev.st_dev != w->attr.st_dev
2114 || w->prev.st_ino != w->attr.st_ino 3862 || prev.st_ino != w->attr.st_ino
2115 || w->prev.st_mode != w->attr.st_mode 3863 || prev.st_mode != w->attr.st_mode
2116 || w->prev.st_nlink != w->attr.st_nlink 3864 || prev.st_nlink != w->attr.st_nlink
2117 || w->prev.st_uid != w->attr.st_uid 3865 || prev.st_uid != w->attr.st_uid
2118 || w->prev.st_gid != w->attr.st_gid 3866 || prev.st_gid != w->attr.st_gid
2119 || w->prev.st_rdev != w->attr.st_rdev 3867 || prev.st_rdev != w->attr.st_rdev
2120 || w->prev.st_size != w->attr.st_size 3868 || prev.st_size != w->attr.st_size
2121 || w->prev.st_atime != w->attr.st_atime 3869 || prev.st_atime != w->attr.st_atime
2122 || w->prev.st_mtime != w->attr.st_mtime 3870 || prev.st_mtime != w->attr.st_mtime
2123 || w->prev.st_ctime != w->attr.st_ctime 3871 || prev.st_ctime != w->attr.st_ctime
2124 ) { 3872 ) {
3873 /* we only update w->prev on actual differences */
3874 /* in case we test more often than invoke the callback, */
3875 /* to ensure that prev is always different to attr */
3876 w->prev = prev;
3877
2125 #if EV_USE_INOTIFY 3878 #if EV_USE_INOTIFY
3879 if (fs_fd >= 0)
3880 {
2126 infy_del (EV_A_ w); 3881 infy_del (EV_A_ w);
2127 infy_add (EV_A_ w); 3882 infy_add (EV_A_ w);
2128 ev_stat_stat (EV_A_ w); /* avoid race... */ 3883 ev_stat_stat (EV_A_ w); /* avoid race... */
3884 }
2129 #endif 3885 #endif
2130 3886
2131 ev_feed_event (EV_A_ w, EV_STAT); 3887 ev_feed_event (EV_A_ w, EV_STAT);
2132 } 3888 }
2133} 3889}
2134 3890
2135void 3891void
2136ev_stat_start (EV_P_ ev_stat *w) 3892ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2137{ 3893{
2138 if (expect_false (ev_is_active (w))) 3894 if (expect_false (ev_is_active (w)))
2139 return; 3895 return;
2140 3896
2141 /* since we use memcmp, we need to clear any padding data etc. */
2142 memset (&w->prev, 0, sizeof (ev_statdata));
2143 memset (&w->attr, 0, sizeof (ev_statdata));
2144
2145 ev_stat_stat (EV_A_ w); 3897 ev_stat_stat (EV_A_ w);
2146 3898
3899 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2147 if (w->interval < MIN_STAT_INTERVAL) 3900 w->interval = MIN_STAT_INTERVAL;
2148 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2149 3901
2150 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3902 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2151 ev_set_priority (&w->timer, ev_priority (w)); 3903 ev_set_priority (&w->timer, ev_priority (w));
2152 3904
2153#if EV_USE_INOTIFY 3905#if EV_USE_INOTIFY
2154 infy_init (EV_A); 3906 infy_init (EV_A);
2155 3907
2156 if (fs_fd >= 0) 3908 if (fs_fd >= 0)
2157 infy_add (EV_A_ w); 3909 infy_add (EV_A_ w);
2158 else 3910 else
2159#endif 3911#endif
3912 {
2160 ev_timer_start (EV_A_ &w->timer); 3913 ev_timer_again (EV_A_ &w->timer);
3914 ev_unref (EV_A);
3915 }
2161 3916
2162 ev_start (EV_A_ (W)w, 1); 3917 ev_start (EV_A_ (W)w, 1);
3918
3919 EV_FREQUENT_CHECK;
2163} 3920}
2164 3921
2165void 3922void
2166ev_stat_stop (EV_P_ ev_stat *w) 3923ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2167{ 3924{
2168 clear_pending (EV_A_ (W)w); 3925 clear_pending (EV_A_ (W)w);
2169 if (expect_false (!ev_is_active (w))) 3926 if (expect_false (!ev_is_active (w)))
2170 return; 3927 return;
2171 3928
3929 EV_FREQUENT_CHECK;
3930
2172#if EV_USE_INOTIFY 3931#if EV_USE_INOTIFY
2173 infy_del (EV_A_ w); 3932 infy_del (EV_A_ w);
2174#endif 3933#endif
3934
3935 if (ev_is_active (&w->timer))
3936 {
3937 ev_ref (EV_A);
2175 ev_timer_stop (EV_A_ &w->timer); 3938 ev_timer_stop (EV_A_ &w->timer);
3939 }
2176 3940
2177 ev_stop (EV_A_ (W)w); 3941 ev_stop (EV_A_ (W)w);
3942
3943 EV_FREQUENT_CHECK;
2178} 3944}
2179#endif 3945#endif
2180 3946
2181#if EV_IDLE_ENABLE 3947#if EV_IDLE_ENABLE
2182void 3948void
2183ev_idle_start (EV_P_ ev_idle *w) 3949ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2184{ 3950{
2185 if (expect_false (ev_is_active (w))) 3951 if (expect_false (ev_is_active (w)))
2186 return; 3952 return;
2187 3953
2188 pri_adjust (EV_A_ (W)w); 3954 pri_adjust (EV_A_ (W)w);
3955
3956 EV_FREQUENT_CHECK;
2189 3957
2190 { 3958 {
2191 int active = ++idlecnt [ABSPRI (w)]; 3959 int active = ++idlecnt [ABSPRI (w)];
2192 3960
2193 ++idleall; 3961 ++idleall;
2194 ev_start (EV_A_ (W)w, active); 3962 ev_start (EV_A_ (W)w, active);
2195 3963
2196 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3964 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2197 idles [ABSPRI (w)][active - 1] = w; 3965 idles [ABSPRI (w)][active - 1] = w;
2198 } 3966 }
3967
3968 EV_FREQUENT_CHECK;
2199} 3969}
2200 3970
2201void 3971void
2202ev_idle_stop (EV_P_ ev_idle *w) 3972ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2203{ 3973{
2204 clear_pending (EV_A_ (W)w); 3974 clear_pending (EV_A_ (W)w);
2205 if (expect_false (!ev_is_active (w))) 3975 if (expect_false (!ev_is_active (w)))
2206 return; 3976 return;
2207 3977
3978 EV_FREQUENT_CHECK;
3979
2208 { 3980 {
2209 int active = ((W)w)->active; 3981 int active = ev_active (w);
2210 3982
2211 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3983 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2212 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3984 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2213 3985
2214 ev_stop (EV_A_ (W)w); 3986 ev_stop (EV_A_ (W)w);
2215 --idleall; 3987 --idleall;
2216 } 3988 }
2217}
2218#endif
2219 3989
3990 EV_FREQUENT_CHECK;
3991}
3992#endif
3993
3994#if EV_PREPARE_ENABLE
2220void 3995void
2221ev_prepare_start (EV_P_ ev_prepare *w) 3996ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2222{ 3997{
2223 if (expect_false (ev_is_active (w))) 3998 if (expect_false (ev_is_active (w)))
2224 return; 3999 return;
4000
4001 EV_FREQUENT_CHECK;
2225 4002
2226 ev_start (EV_A_ (W)w, ++preparecnt); 4003 ev_start (EV_A_ (W)w, ++preparecnt);
2227 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4004 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2228 prepares [preparecnt - 1] = w; 4005 prepares [preparecnt - 1] = w;
4006
4007 EV_FREQUENT_CHECK;
2229} 4008}
2230 4009
2231void 4010void
2232ev_prepare_stop (EV_P_ ev_prepare *w) 4011ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2233{ 4012{
2234 clear_pending (EV_A_ (W)w); 4013 clear_pending (EV_A_ (W)w);
2235 if (expect_false (!ev_is_active (w))) 4014 if (expect_false (!ev_is_active (w)))
2236 return; 4015 return;
2237 4016
4017 EV_FREQUENT_CHECK;
4018
2238 { 4019 {
2239 int active = ((W)w)->active; 4020 int active = ev_active (w);
4021
2240 prepares [active - 1] = prepares [--preparecnt]; 4022 prepares [active - 1] = prepares [--preparecnt];
2241 ((W)prepares [active - 1])->active = active; 4023 ev_active (prepares [active - 1]) = active;
2242 } 4024 }
2243 4025
2244 ev_stop (EV_A_ (W)w); 4026 ev_stop (EV_A_ (W)w);
2245}
2246 4027
4028 EV_FREQUENT_CHECK;
4029}
4030#endif
4031
4032#if EV_CHECK_ENABLE
2247void 4033void
2248ev_check_start (EV_P_ ev_check *w) 4034ev_check_start (EV_P_ ev_check *w) EV_THROW
2249{ 4035{
2250 if (expect_false (ev_is_active (w))) 4036 if (expect_false (ev_is_active (w)))
2251 return; 4037 return;
4038
4039 EV_FREQUENT_CHECK;
2252 4040
2253 ev_start (EV_A_ (W)w, ++checkcnt); 4041 ev_start (EV_A_ (W)w, ++checkcnt);
2254 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4042 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2255 checks [checkcnt - 1] = w; 4043 checks [checkcnt - 1] = w;
4044
4045 EV_FREQUENT_CHECK;
2256} 4046}
2257 4047
2258void 4048void
2259ev_check_stop (EV_P_ ev_check *w) 4049ev_check_stop (EV_P_ ev_check *w) EV_THROW
2260{ 4050{
2261 clear_pending (EV_A_ (W)w); 4051 clear_pending (EV_A_ (W)w);
2262 if (expect_false (!ev_is_active (w))) 4052 if (expect_false (!ev_is_active (w)))
2263 return; 4053 return;
2264 4054
4055 EV_FREQUENT_CHECK;
4056
2265 { 4057 {
2266 int active = ((W)w)->active; 4058 int active = ev_active (w);
4059
2267 checks [active - 1] = checks [--checkcnt]; 4060 checks [active - 1] = checks [--checkcnt];
2268 ((W)checks [active - 1])->active = active; 4061 ev_active (checks [active - 1]) = active;
2269 } 4062 }
2270 4063
2271 ev_stop (EV_A_ (W)w); 4064 ev_stop (EV_A_ (W)w);
4065
4066 EV_FREQUENT_CHECK;
2272} 4067}
4068#endif
2273 4069
2274#if EV_EMBED_ENABLE 4070#if EV_EMBED_ENABLE
2275void noinline 4071void noinline
2276ev_embed_sweep (EV_P_ ev_embed *w) 4072ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2277{ 4073{
2278 ev_loop (w->other, EVLOOP_NONBLOCK); 4074 ev_run (w->other, EVRUN_NOWAIT);
2279} 4075}
2280 4076
2281static void 4077static void
2282embed_io_cb (EV_P_ ev_io *io, int revents) 4078embed_io_cb (EV_P_ ev_io *io, int revents)
2283{ 4079{
2284 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4080 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2285 4081
2286 if (ev_cb (w)) 4082 if (ev_cb (w))
2287 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4083 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2288 else 4084 else
2289 ev_loop (w->other, EVLOOP_NONBLOCK); 4085 ev_run (w->other, EVRUN_NOWAIT);
2290} 4086}
2291 4087
2292static void 4088static void
2293embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4089embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2294{ 4090{
2295 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4091 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2296 4092
2297 { 4093 {
2298 struct ev_loop *loop = w->other; 4094 EV_P = w->other;
2299 4095
2300 while (fdchangecnt) 4096 while (fdchangecnt)
2301 { 4097 {
2302 fd_reify (EV_A); 4098 fd_reify (EV_A);
2303 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4099 ev_run (EV_A_ EVRUN_NOWAIT);
2304 } 4100 }
2305 } 4101 }
4102}
4103
4104static void
4105embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4106{
4107 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4108
4109 ev_embed_stop (EV_A_ w);
4110
4111 {
4112 EV_P = w->other;
4113
4114 ev_loop_fork (EV_A);
4115 ev_run (EV_A_ EVRUN_NOWAIT);
4116 }
4117
4118 ev_embed_start (EV_A_ w);
2306} 4119}
2307 4120
2308#if 0 4121#if 0
2309static void 4122static void
2310embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4123embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2312 ev_idle_stop (EV_A_ idle); 4125 ev_idle_stop (EV_A_ idle);
2313} 4126}
2314#endif 4127#endif
2315 4128
2316void 4129void
2317ev_embed_start (EV_P_ ev_embed *w) 4130ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2318{ 4131{
2319 if (expect_false (ev_is_active (w))) 4132 if (expect_false (ev_is_active (w)))
2320 return; 4133 return;
2321 4134
2322 { 4135 {
2323 struct ev_loop *loop = w->other; 4136 EV_P = w->other;
2324 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4137 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2325 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4138 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2326 } 4139 }
4140
4141 EV_FREQUENT_CHECK;
2327 4142
2328 ev_set_priority (&w->io, ev_priority (w)); 4143 ev_set_priority (&w->io, ev_priority (w));
2329 ev_io_start (EV_A_ &w->io); 4144 ev_io_start (EV_A_ &w->io);
2330 4145
2331 ev_prepare_init (&w->prepare, embed_prepare_cb); 4146 ev_prepare_init (&w->prepare, embed_prepare_cb);
2332 ev_set_priority (&w->prepare, EV_MINPRI); 4147 ev_set_priority (&w->prepare, EV_MINPRI);
2333 ev_prepare_start (EV_A_ &w->prepare); 4148 ev_prepare_start (EV_A_ &w->prepare);
2334 4149
4150 ev_fork_init (&w->fork, embed_fork_cb);
4151 ev_fork_start (EV_A_ &w->fork);
4152
2335 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4153 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2336 4154
2337 ev_start (EV_A_ (W)w, 1); 4155 ev_start (EV_A_ (W)w, 1);
4156
4157 EV_FREQUENT_CHECK;
2338} 4158}
2339 4159
2340void 4160void
2341ev_embed_stop (EV_P_ ev_embed *w) 4161ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2342{ 4162{
2343 clear_pending (EV_A_ (W)w); 4163 clear_pending (EV_A_ (W)w);
2344 if (expect_false (!ev_is_active (w))) 4164 if (expect_false (!ev_is_active (w)))
2345 return; 4165 return;
2346 4166
4167 EV_FREQUENT_CHECK;
4168
2347 ev_io_stop (EV_A_ &w->io); 4169 ev_io_stop (EV_A_ &w->io);
2348 ev_prepare_stop (EV_A_ &w->prepare); 4170 ev_prepare_stop (EV_A_ &w->prepare);
4171 ev_fork_stop (EV_A_ &w->fork);
2349 4172
2350 ev_stop (EV_A_ (W)w); 4173 ev_stop (EV_A_ (W)w);
4174
4175 EV_FREQUENT_CHECK;
2351} 4176}
2352#endif 4177#endif
2353 4178
2354#if EV_FORK_ENABLE 4179#if EV_FORK_ENABLE
2355void 4180void
2356ev_fork_start (EV_P_ ev_fork *w) 4181ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2357{ 4182{
2358 if (expect_false (ev_is_active (w))) 4183 if (expect_false (ev_is_active (w)))
2359 return; 4184 return;
4185
4186 EV_FREQUENT_CHECK;
2360 4187
2361 ev_start (EV_A_ (W)w, ++forkcnt); 4188 ev_start (EV_A_ (W)w, ++forkcnt);
2362 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4189 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2363 forks [forkcnt - 1] = w; 4190 forks [forkcnt - 1] = w;
4191
4192 EV_FREQUENT_CHECK;
2364} 4193}
2365 4194
2366void 4195void
2367ev_fork_stop (EV_P_ ev_fork *w) 4196ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2368{ 4197{
2369 clear_pending (EV_A_ (W)w); 4198 clear_pending (EV_A_ (W)w);
2370 if (expect_false (!ev_is_active (w))) 4199 if (expect_false (!ev_is_active (w)))
2371 return; 4200 return;
2372 4201
4202 EV_FREQUENT_CHECK;
4203
2373 { 4204 {
2374 int active = ((W)w)->active; 4205 int active = ev_active (w);
4206
2375 forks [active - 1] = forks [--forkcnt]; 4207 forks [active - 1] = forks [--forkcnt];
2376 ((W)forks [active - 1])->active = active; 4208 ev_active (forks [active - 1]) = active;
2377 } 4209 }
2378 4210
2379 ev_stop (EV_A_ (W)w); 4211 ev_stop (EV_A_ (W)w);
4212
4213 EV_FREQUENT_CHECK;
4214}
4215#endif
4216
4217#if EV_CLEANUP_ENABLE
4218void
4219ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4220{
4221 if (expect_false (ev_is_active (w)))
4222 return;
4223
4224 EV_FREQUENT_CHECK;
4225
4226 ev_start (EV_A_ (W)w, ++cleanupcnt);
4227 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4228 cleanups [cleanupcnt - 1] = w;
4229
4230 /* cleanup watchers should never keep a refcount on the loop */
4231 ev_unref (EV_A);
4232 EV_FREQUENT_CHECK;
4233}
4234
4235void
4236ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4237{
4238 clear_pending (EV_A_ (W)w);
4239 if (expect_false (!ev_is_active (w)))
4240 return;
4241
4242 EV_FREQUENT_CHECK;
4243 ev_ref (EV_A);
4244
4245 {
4246 int active = ev_active (w);
4247
4248 cleanups [active - 1] = cleanups [--cleanupcnt];
4249 ev_active (cleanups [active - 1]) = active;
4250 }
4251
4252 ev_stop (EV_A_ (W)w);
4253
4254 EV_FREQUENT_CHECK;
4255}
4256#endif
4257
4258#if EV_ASYNC_ENABLE
4259void
4260ev_async_start (EV_P_ ev_async *w) EV_THROW
4261{
4262 if (expect_false (ev_is_active (w)))
4263 return;
4264
4265 w->sent = 0;
4266
4267 evpipe_init (EV_A);
4268
4269 EV_FREQUENT_CHECK;
4270
4271 ev_start (EV_A_ (W)w, ++asynccnt);
4272 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4273 asyncs [asynccnt - 1] = w;
4274
4275 EV_FREQUENT_CHECK;
4276}
4277
4278void
4279ev_async_stop (EV_P_ ev_async *w) EV_THROW
4280{
4281 clear_pending (EV_A_ (W)w);
4282 if (expect_false (!ev_is_active (w)))
4283 return;
4284
4285 EV_FREQUENT_CHECK;
4286
4287 {
4288 int active = ev_active (w);
4289
4290 asyncs [active - 1] = asyncs [--asynccnt];
4291 ev_active (asyncs [active - 1]) = active;
4292 }
4293
4294 ev_stop (EV_A_ (W)w);
4295
4296 EV_FREQUENT_CHECK;
4297}
4298
4299void
4300ev_async_send (EV_P_ ev_async *w) EV_THROW
4301{
4302 w->sent = 1;
4303 evpipe_write (EV_A_ &async_pending);
2380} 4304}
2381#endif 4305#endif
2382 4306
2383/*****************************************************************************/ 4307/*****************************************************************************/
2384 4308
… …
2394once_cb (EV_P_ struct ev_once *once, int revents) 4318once_cb (EV_P_ struct ev_once *once, int revents)
2395{ 4319{
2396 void (*cb)(int revents, void *arg) = once->cb; 4320 void (*cb)(int revents, void *arg) = once->cb;
2397 void *arg = once->arg; 4321 void *arg = once->arg;
2398 4322
2399 ev_io_stop (EV_A_ &once->io); 4323 ev_io_stop (EV_A_ &once->io);
2400 ev_timer_stop (EV_A_ &once->to); 4324 ev_timer_stop (EV_A_ &once->to);
2401 ev_free (once); 4325 ev_free (once);
2402 4326
2403 cb (revents, arg); 4327 cb (revents, arg);
2404} 4328}
2405 4329
2406static void 4330static void
2407once_cb_io (EV_P_ ev_io *w, int revents) 4331once_cb_io (EV_P_ ev_io *w, int revents)
2408{ 4332{
2409 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4333 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4334
4335 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2410} 4336}
2411 4337
2412static void 4338static void
2413once_cb_to (EV_P_ ev_timer *w, int revents) 4339once_cb_to (EV_P_ ev_timer *w, int revents)
2414{ 4340{
2415 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4341 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4342
4343 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2416} 4344}
2417 4345
2418void 4346void
2419ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4347ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2420{ 4348{
2421 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4349 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2422 4350
2423 if (expect_false (!once)) 4351 if (expect_false (!once))
2424 { 4352 {
2425 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4353 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2426 return; 4354 return;
2427 } 4355 }
2428 4356
2429 once->cb = cb; 4357 once->cb = cb;
2430 once->arg = arg; 4358 once->arg = arg;
… …
2442 ev_timer_set (&once->to, timeout, 0.); 4370 ev_timer_set (&once->to, timeout, 0.);
2443 ev_timer_start (EV_A_ &once->to); 4371 ev_timer_start (EV_A_ &once->to);
2444 } 4372 }
2445} 4373}
2446 4374
4375/*****************************************************************************/
4376
4377#if EV_WALK_ENABLE
4378void ecb_cold
4379ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4380{
4381 int i, j;
4382 ev_watcher_list *wl, *wn;
4383
4384 if (types & (EV_IO | EV_EMBED))
4385 for (i = 0; i < anfdmax; ++i)
4386 for (wl = anfds [i].head; wl; )
4387 {
4388 wn = wl->next;
4389
4390#if EV_EMBED_ENABLE
4391 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4392 {
4393 if (types & EV_EMBED)
4394 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4395 }
4396 else
4397#endif
4398#if EV_USE_INOTIFY
4399 if (ev_cb ((ev_io *)wl) == infy_cb)
4400 ;
4401 else
4402#endif
4403 if ((ev_io *)wl != &pipe_w)
4404 if (types & EV_IO)
4405 cb (EV_A_ EV_IO, wl);
4406
4407 wl = wn;
4408 }
4409
4410 if (types & (EV_TIMER | EV_STAT))
4411 for (i = timercnt + HEAP0; i-- > HEAP0; )
4412#if EV_STAT_ENABLE
4413 /*TODO: timer is not always active*/
4414 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4415 {
4416 if (types & EV_STAT)
4417 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4418 }
4419 else
4420#endif
4421 if (types & EV_TIMER)
4422 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4423
4424#if EV_PERIODIC_ENABLE
4425 if (types & EV_PERIODIC)
4426 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4427 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4428#endif
4429
4430#if EV_IDLE_ENABLE
4431 if (types & EV_IDLE)
4432 for (j = NUMPRI; j--; )
4433 for (i = idlecnt [j]; i--; )
4434 cb (EV_A_ EV_IDLE, idles [j][i]);
4435#endif
4436
4437#if EV_FORK_ENABLE
4438 if (types & EV_FORK)
4439 for (i = forkcnt; i--; )
4440 if (ev_cb (forks [i]) != embed_fork_cb)
4441 cb (EV_A_ EV_FORK, forks [i]);
4442#endif
4443
4444#if EV_ASYNC_ENABLE
4445 if (types & EV_ASYNC)
4446 for (i = asynccnt; i--; )
4447 cb (EV_A_ EV_ASYNC, asyncs [i]);
4448#endif
4449
4450#if EV_PREPARE_ENABLE
4451 if (types & EV_PREPARE)
4452 for (i = preparecnt; i--; )
4453# if EV_EMBED_ENABLE
4454 if (ev_cb (prepares [i]) != embed_prepare_cb)
4455# endif
4456 cb (EV_A_ EV_PREPARE, prepares [i]);
4457#endif
4458
4459#if EV_CHECK_ENABLE
4460 if (types & EV_CHECK)
4461 for (i = checkcnt; i--; )
4462 cb (EV_A_ EV_CHECK, checks [i]);
4463#endif
4464
4465#if EV_SIGNAL_ENABLE
4466 if (types & EV_SIGNAL)
4467 for (i = 0; i < EV_NSIG - 1; ++i)
4468 for (wl = signals [i].head; wl; )
4469 {
4470 wn = wl->next;
4471 cb (EV_A_ EV_SIGNAL, wl);
4472 wl = wn;
4473 }
4474#endif
4475
4476#if EV_CHILD_ENABLE
4477 if (types & EV_CHILD)
4478 for (i = (EV_PID_HASHSIZE); i--; )
4479 for (wl = childs [i]; wl; )
4480 {
4481 wn = wl->next;
4482 cb (EV_A_ EV_CHILD, wl);
4483 wl = wn;
4484 }
4485#endif
4486/* EV_STAT 0x00001000 /* stat data changed */
4487/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4488}
4489#endif
4490
2447#if EV_MULTIPLICITY 4491#if EV_MULTIPLICITY
2448 #include "ev_wrap.h" 4492 #include "ev_wrap.h"
2449#endif 4493#endif
2450 4494
2451#ifdef __cplusplus
2452}
2453#endif
2454

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