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Comparing libev/ev.c (file contents):
Revision 1.220 by root, Sun Apr 6 09:53:17 2008 UTC vs.
Revision 1.450 by root, Mon Oct 8 15:43:35 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 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
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
51 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
130# endif 154# endif
131 155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
132#endif 163# endif
164
165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# include "ev.h" 185# include "ev.h"
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
152#endif 197#endif
153 198
154#ifndef _WIN32 199#ifndef _WIN32
155# include <sys/time.h> 200# include <sys/time.h>
156# include <sys/wait.h> 201# include <sys/wait.h>
157# include <unistd.h> 202# include <unistd.h>
158#else 203#else
204# include <io.h>
159# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
160# include <windows.h> 207# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
163# endif 210# endif
211# undef EV_AVOID_STDIO
164#endif 212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
165 221
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
167 223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
261# endif
262#endif
263
168#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
169# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
269# endif
170#endif 270#endif
171 271
172#ifndef EV_USE_REALTIME 272#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 274#endif
175 275
176#ifndef EV_USE_NANOSLEEP 276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
177# define EV_USE_NANOSLEEP 0 280# define EV_USE_NANOSLEEP 0
281# endif
178#endif 282#endif
179 283
180#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 286#endif
183 287
184#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
185# ifdef _WIN32 289# ifdef _WIN32
186# define EV_USE_POLL 0 290# define EV_USE_POLL 0
187# else 291# else
188# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 293# endif
190#endif 294#endif
191 295
192#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 299# else
196# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
197# endif 301# endif
198#endif 302#endif
199 303
… …
205# define EV_USE_PORT 0 309# define EV_USE_PORT 0
206#endif 310#endif
207 311
208#ifndef EV_USE_INOTIFY 312#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 314# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 315# else
212# define EV_USE_INOTIFY 0 316# define EV_USE_INOTIFY 0
213# endif 317# endif
214#endif 318#endif
215 319
216#ifndef EV_PID_HASHSIZE 320#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 322#endif
223 323
224#ifndef EV_INOTIFY_HASHSIZE 324#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 326#endif
231 327
232#ifndef EV_USE_EVENTFD 328#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 330# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 331# else
236# define EV_USE_EVENTFD 0 332# define EV_USE_EVENTFD 0
237# endif 333# endif
238#endif 334#endif
239 335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
241 383
242#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
245#endif 387#endif
… …
253# undef EV_USE_INOTIFY 395# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 396# define EV_USE_INOTIFY 0
255#endif 397#endif
256 398
257#if !EV_USE_NANOSLEEP 399#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
259# include <sys/select.h> 402# include <sys/select.h>
260# endif 403# endif
261#endif 404#endif
262 405
263#if EV_USE_INOTIFY 406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
264# include <sys/inotify.h> 408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
265#endif 413# endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif 414#endif
270 415
271#if EV_USE_EVENTFD 416#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
273int eventfd (unsigned int initval, int flags); 429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
274#endif 452#endif
275 453
276/**/ 454/**/
277 455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
278/* 462/*
279 * This is used to avoid floating point rounding problems. 463 * This is used to work around floating point rounding problems.
280 * It is added to ev_rt_now when scheduling periodics
281 * to ensure progress, time-wise, even when rounding
282 * errors are against us.
283 * This value is good at least till the year 4000. 464 * This value is good at least till the year 4000.
284 * Better solutions welcome.
285 */ 465 */
286#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
287 468
288#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
289#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
290/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
291 471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010002
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;
292#if __GNUC__ >= 4 519 #if __GNUC__
293# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
294# 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
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
295#else 535#else
296# define expect(expr,value) (expr) 536 #include <inttypes.h>
297# define noinline 537 #if UINTMAX_MAX > 0xffffffffU
298# if __STDC_VERSION__ < 199901L 538 #define ECB_PTRSIZE 8
299# define inline 539 #else
540 #define ECB_PTRSIZE 4
541 #endif
300# endif 542#endif
543
544/* many compilers define _GNUC_ to some versions but then only implement
545 * what their idiot authors think are the "more important" extensions,
546 * causing enormous grief in return for some better fake benchmark numbers.
547 * or so.
548 * we try to detect these and simply assume they are not gcc - if they have
549 * an issue with that they should have done it right in the first place.
550 */
551#ifndef ECB_GCC_VERSION
552 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
553 #define ECB_GCC_VERSION(major,minor) 0
554 #else
555 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
301#endif 556 #endif
557#endif
302 558
559#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
560#define ECB_C99 (__STDC_VERSION__ >= 199901L)
561#define ECB_C11 (__STDC_VERSION__ >= 201112L)
562#define ECB_CPP (__cplusplus+0)
563#define ECB_CPP11 (__cplusplus >= 201103L)
564
565#if ECB_CPP
566 #define ECB_EXTERN_C extern "C"
567 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
568 #define ECB_EXTERN_C_END }
569#else
570 #define ECB_EXTERN_C extern
571 #define ECB_EXTERN_C_BEG
572 #define ECB_EXTERN_C_END
573#endif
574
575/*****************************************************************************/
576
577/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
578/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
579
580#if ECB_NO_THREADS
581 #define ECB_NO_SMP 1
582#endif
583
584#if ECB_NO_SMP
585 #define ECB_MEMORY_FENCE do { } while (0)
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
590 #if __i386 || __i386__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
592 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
593 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
594 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
595 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
596 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
597 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
598 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
600 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
601 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
603 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
604 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
606 #elif __sparc || __sparc__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
608 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
610 #elif defined __s390__ || defined __s390x__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
612 #elif defined __mips__
613 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
614 #elif defined __alpha__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
616 #elif defined __hppa__
617 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
618 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
619 #elif defined __ia64__
620 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
621 #endif
622 #endif
623#endif
624
625#ifndef ECB_MEMORY_FENCE
626 #if ECB_GCC_VERSION(4,7)
627 /* see comment below (stdatomic.h) about the C11 memory model. */
628 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
629
630 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
631 * without risking compile time errors with other compilers. We *could*
632 * define our own ecb_clang_has_feature, but I just can't be bothered to work
633 * around this shit time and again.
634 * #elif defined __clang && __has_feature (cxx_atomic)
635 * // see comment below (stdatomic.h) about the C11 memory model.
636 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
637 */
638
639 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
640 #define ECB_MEMORY_FENCE __sync_synchronize ()
641 #elif _MSC_VER >= 1400 /* VC++ 2005 */
642 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
643 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
644 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
645 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
646 #elif defined _WIN32
647 #include <WinNT.h>
648 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
649 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
650 #include <mbarrier.h>
651 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
652 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
653 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
654 #elif __xlC__
655 #define ECB_MEMORY_FENCE __sync ()
656 #endif
657#endif
658
659#ifndef ECB_MEMORY_FENCE
660 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
661 /* we assume that these memory fences work on all variables/all memory accesses, */
662 /* not just C11 atomics and atomic accesses */
663 #include <stdatomic.h>
664 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
665 /* any fence other than seq_cst, which isn't very efficient for us. */
666 /* Why that is, we don't know - either the C11 memory model is quite useless */
667 /* for most usages, or gcc and clang have a bug */
668 /* I *currently* lean towards the latter, and inefficiently implement */
669 /* all three of ecb's fences as a seq_cst fence */
670 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
671 #endif
672#endif
673
674#ifndef ECB_MEMORY_FENCE
675 #if !ECB_AVOID_PTHREADS
676 /*
677 * if you get undefined symbol references to pthread_mutex_lock,
678 * or failure to find pthread.h, then you should implement
679 * the ECB_MEMORY_FENCE operations for your cpu/compiler
680 * OR provide pthread.h and link against the posix thread library
681 * of your system.
682 */
683 #include <pthread.h>
684 #define ECB_NEEDS_PTHREADS 1
685 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
686
687 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
688 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
689 #endif
690#endif
691
692#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
693 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
694#endif
695
696#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
697 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
698#endif
699
700/*****************************************************************************/
701
702#if __cplusplus
703 #define ecb_inline static inline
704#elif ECB_GCC_VERSION(2,5)
705 #define ecb_inline static __inline__
706#elif ECB_C99
707 #define ecb_inline static inline
708#else
709 #define ecb_inline static
710#endif
711
712#if ECB_GCC_VERSION(3,3)
713 #define ecb_restrict __restrict__
714#elif ECB_C99
715 #define ecb_restrict restrict
716#else
717 #define ecb_restrict
718#endif
719
720typedef int ecb_bool;
721
722#define ECB_CONCAT_(a, b) a ## b
723#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
724#define ECB_STRINGIFY_(a) # a
725#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
726
727#define ecb_function_ ecb_inline
728
729#if ECB_GCC_VERSION(3,1)
730 #define ecb_attribute(attrlist) __attribute__(attrlist)
731 #define ecb_is_constant(expr) __builtin_constant_p (expr)
732 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
733 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
734#else
735 #define ecb_attribute(attrlist)
736 #define ecb_is_constant(expr) 0
737 #define ecb_expect(expr,value) (expr)
738 #define ecb_prefetch(addr,rw,locality)
739#endif
740
741/* no emulation for ecb_decltype */
742#if ECB_GCC_VERSION(4,5)
743 #define ecb_decltype(x) __decltype(x)
744#elif ECB_GCC_VERSION(3,0)
745 #define ecb_decltype(x) __typeof(x)
746#endif
747
748#define ecb_noinline ecb_attribute ((__noinline__))
749#define ecb_unused ecb_attribute ((__unused__))
750#define ecb_const ecb_attribute ((__const__))
751#define ecb_pure ecb_attribute ((__pure__))
752
753#if ECB_C11
754 #define ecb_noreturn _Noreturn
755#else
756 #define ecb_noreturn ecb_attribute ((__noreturn__))
757#endif
758
759#if ECB_GCC_VERSION(4,3)
760 #define ecb_artificial ecb_attribute ((__artificial__))
761 #define ecb_hot ecb_attribute ((__hot__))
762 #define ecb_cold ecb_attribute ((__cold__))
763#else
764 #define ecb_artificial
765 #define ecb_hot
766 #define ecb_cold
767#endif
768
769/* put around conditional expressions if you are very sure that the */
770/* expression is mostly true or mostly false. note that these return */
771/* booleans, not the expression. */
303#define expect_false(expr) expect ((expr) != 0, 0) 772#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
304#define expect_true(expr) expect ((expr) != 0, 1) 773#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
774/* for compatibility to the rest of the world */
775#define ecb_likely(expr) ecb_expect_true (expr)
776#define ecb_unlikely(expr) ecb_expect_false (expr)
777
778/* count trailing zero bits and count # of one bits */
779#if ECB_GCC_VERSION(3,4)
780 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
781 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
782 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
783 #define ecb_ctz32(x) __builtin_ctz (x)
784 #define ecb_ctz64(x) __builtin_ctzll (x)
785 #define ecb_popcount32(x) __builtin_popcount (x)
786 /* no popcountll */
787#else
788 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
789 ecb_function_ int
790 ecb_ctz32 (uint32_t x)
791 {
792 int r = 0;
793
794 x &= ~x + 1; /* this isolates the lowest bit */
795
796#if ECB_branchless_on_i386
797 r += !!(x & 0xaaaaaaaa) << 0;
798 r += !!(x & 0xcccccccc) << 1;
799 r += !!(x & 0xf0f0f0f0) << 2;
800 r += !!(x & 0xff00ff00) << 3;
801 r += !!(x & 0xffff0000) << 4;
802#else
803 if (x & 0xaaaaaaaa) r += 1;
804 if (x & 0xcccccccc) r += 2;
805 if (x & 0xf0f0f0f0) r += 4;
806 if (x & 0xff00ff00) r += 8;
807 if (x & 0xffff0000) r += 16;
808#endif
809
810 return r;
811 }
812
813 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
814 ecb_function_ int
815 ecb_ctz64 (uint64_t x)
816 {
817 int shift = x & 0xffffffffU ? 0 : 32;
818 return ecb_ctz32 (x >> shift) + shift;
819 }
820
821 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
822 ecb_function_ int
823 ecb_popcount32 (uint32_t x)
824 {
825 x -= (x >> 1) & 0x55555555;
826 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
827 x = ((x >> 4) + x) & 0x0f0f0f0f;
828 x *= 0x01010101;
829
830 return x >> 24;
831 }
832
833 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
834 ecb_function_ int ecb_ld32 (uint32_t x)
835 {
836 int r = 0;
837
838 if (x >> 16) { x >>= 16; r += 16; }
839 if (x >> 8) { x >>= 8; r += 8; }
840 if (x >> 4) { x >>= 4; r += 4; }
841 if (x >> 2) { x >>= 2; r += 2; }
842 if (x >> 1) { r += 1; }
843
844 return r;
845 }
846
847 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
848 ecb_function_ int ecb_ld64 (uint64_t x)
849 {
850 int r = 0;
851
852 if (x >> 32) { x >>= 32; r += 32; }
853
854 return r + ecb_ld32 (x);
855 }
856#endif
857
858ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
859ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
860ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
861ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
862
863ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
864ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
865{
866 return ( (x * 0x0802U & 0x22110U)
867 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
868}
869
870ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
871ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
872{
873 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
874 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
875 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
876 x = ( x >> 8 ) | ( x << 8);
877
878 return x;
879}
880
881ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
882ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
883{
884 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
885 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
886 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
887 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
888 x = ( x >> 16 ) | ( x << 16);
889
890 return x;
891}
892
893/* popcount64 is only available on 64 bit cpus as gcc builtin */
894/* so for this version we are lazy */
895ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
896ecb_function_ int
897ecb_popcount64 (uint64_t x)
898{
899 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
900}
901
902ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
903ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
904ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
905ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
906ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
907ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
908ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
909ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
910
911ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
912ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
913ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
914ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
915ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
916ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
917ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
918ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
919
920#if ECB_GCC_VERSION(4,3)
921 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
922 #define ecb_bswap32(x) __builtin_bswap32 (x)
923 #define ecb_bswap64(x) __builtin_bswap64 (x)
924#else
925 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
926 ecb_function_ uint16_t
927 ecb_bswap16 (uint16_t x)
928 {
929 return ecb_rotl16 (x, 8);
930 }
931
932 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
933 ecb_function_ uint32_t
934 ecb_bswap32 (uint32_t x)
935 {
936 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
937 }
938
939 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
940 ecb_function_ uint64_t
941 ecb_bswap64 (uint64_t x)
942 {
943 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
944 }
945#endif
946
947#if ECB_GCC_VERSION(4,5)
948 #define ecb_unreachable() __builtin_unreachable ()
949#else
950 /* this seems to work fine, but gcc always emits a warning for it :/ */
951 ecb_inline void ecb_unreachable (void) ecb_noreturn;
952 ecb_inline void ecb_unreachable (void) { }
953#endif
954
955/* try to tell the compiler that some condition is definitely true */
956#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
957
958ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
959ecb_inline unsigned char
960ecb_byteorder_helper (void)
961{
962 /* the union code still generates code under pressure in gcc, */
963 /* but less than using pointers, and always seems to */
964 /* successfully return a constant. */
965 /* the reason why we have this horrible preprocessor mess */
966 /* is to avoid it in all cases, at least on common architectures */
967 /* or when using a recent enough gcc version (>= 4.6) */
968#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
969 return 0x44;
970#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
971 return 0x44;
972#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
973 return 0x11;
974#else
975 union
976 {
977 uint32_t i;
978 uint8_t c;
979 } u = { 0x11223344 };
980 return u.c;
981#endif
982}
983
984ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
985ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
986ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
987ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
988
989#if ECB_GCC_VERSION(3,0) || ECB_C99
990 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
991#else
992 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
993#endif
994
995#if __cplusplus
996 template<typename T>
997 static inline T ecb_div_rd (T val, T div)
998 {
999 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1000 }
1001 template<typename T>
1002 static inline T ecb_div_ru (T val, T div)
1003 {
1004 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1005 }
1006#else
1007 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1008 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1009#endif
1010
1011#if ecb_cplusplus_does_not_suck
1012 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1013 template<typename T, int N>
1014 static inline int ecb_array_length (const T (&arr)[N])
1015 {
1016 return N;
1017 }
1018#else
1019 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1020#endif
1021
1022/*******************************************************************************/
1023/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1024
1025/* basically, everything uses "ieee pure-endian" floating point numbers */
1026/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1027#if 0 \
1028 || __i386 || __i386__ \
1029 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1030 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1031 || defined __arm__ && defined __ARM_EABI__ \
1032 || defined __s390__ || defined __s390x__ \
1033 || defined __mips__ \
1034 || defined __alpha__ \
1035 || defined __hppa__ \
1036 || defined __ia64__ \
1037 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1038 #define ECB_STDFP 1
1039 #include <string.h> /* for memcpy */
1040#else
1041 #define ECB_STDFP 0
1042 #include <math.h> /* for frexp*, ldexp* */
1043#endif
1044
1045#ifndef ECB_NO_LIBM
1046
1047 /* convert a float to ieee single/binary32 */
1048 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1049 ecb_function_ uint32_t
1050 ecb_float_to_binary32 (float x)
1051 {
1052 uint32_t r;
1053
1054 #if ECB_STDFP
1055 memcpy (&r, &x, 4);
1056 #else
1057 /* slow emulation, works for anything but -0 */
1058 uint32_t m;
1059 int e;
1060
1061 if (x == 0e0f ) return 0x00000000U;
1062 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1063 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1064 if (x != x ) return 0x7fbfffffU;
1065
1066 m = frexpf (x, &e) * 0x1000000U;
1067
1068 r = m & 0x80000000U;
1069
1070 if (r)
1071 m = -m;
1072
1073 if (e <= -126)
1074 {
1075 m &= 0xffffffU;
1076 m >>= (-125 - e);
1077 e = -126;
1078 }
1079
1080 r |= (e + 126) << 23;
1081 r |= m & 0x7fffffU;
1082 #endif
1083
1084 return r;
1085 }
1086
1087 /* converts an ieee single/binary32 to a float */
1088 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1089 ecb_function_ float
1090 ecb_binary32_to_float (uint32_t x)
1091 {
1092 float r;
1093
1094 #if ECB_STDFP
1095 memcpy (&r, &x, 4);
1096 #else
1097 /* emulation, only works for normals and subnormals and +0 */
1098 int neg = x >> 31;
1099 int e = (x >> 23) & 0xffU;
1100
1101 x &= 0x7fffffU;
1102
1103 if (e)
1104 x |= 0x800000U;
1105 else
1106 e = 1;
1107
1108 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1109 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1110
1111 r = neg ? -r : r;
1112 #endif
1113
1114 return r;
1115 }
1116
1117 /* convert a double to ieee double/binary64 */
1118 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1119 ecb_function_ uint64_t
1120 ecb_double_to_binary64 (double x)
1121 {
1122 uint64_t r;
1123
1124 #if ECB_STDFP
1125 memcpy (&r, &x, 8);
1126 #else
1127 /* slow emulation, works for anything but -0 */
1128 uint64_t m;
1129 int e;
1130
1131 if (x == 0e0 ) return 0x0000000000000000U;
1132 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1133 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1134 if (x != x ) return 0X7ff7ffffffffffffU;
1135
1136 m = frexp (x, &e) * 0x20000000000000U;
1137
1138 r = m & 0x8000000000000000;;
1139
1140 if (r)
1141 m = -m;
1142
1143 if (e <= -1022)
1144 {
1145 m &= 0x1fffffffffffffU;
1146 m >>= (-1021 - e);
1147 e = -1022;
1148 }
1149
1150 r |= ((uint64_t)(e + 1022)) << 52;
1151 r |= m & 0xfffffffffffffU;
1152 #endif
1153
1154 return r;
1155 }
1156
1157 /* converts an ieee double/binary64 to a double */
1158 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1159 ecb_function_ double
1160 ecb_binary64_to_double (uint64_t x)
1161 {
1162 double r;
1163
1164 #if ECB_STDFP
1165 memcpy (&r, &x, 8);
1166 #else
1167 /* emulation, only works for normals and subnormals and +0 */
1168 int neg = x >> 63;
1169 int e = (x >> 52) & 0x7ffU;
1170
1171 x &= 0xfffffffffffffU;
1172
1173 if (e)
1174 x |= 0x10000000000000U;
1175 else
1176 e = 1;
1177
1178 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1179 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1180
1181 r = neg ? -r : r;
1182 #endif
1183
1184 return r;
1185 }
1186
1187#endif
1188
1189#endif
1190
1191/* ECB.H END */
1192
1193#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1194/* if your architecture doesn't need memory fences, e.g. because it is
1195 * single-cpu/core, or if you use libev in a project that doesn't use libev
1196 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1197 * libev, in which cases the memory fences become nops.
1198 * alternatively, you can remove this #error and link against libpthread,
1199 * which will then provide the memory fences.
1200 */
1201# error "memory fences not defined for your architecture, please report"
1202#endif
1203
1204#ifndef ECB_MEMORY_FENCE
1205# define ECB_MEMORY_FENCE do { } while (0)
1206# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1207# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1208#endif
1209
1210#define expect_false(cond) ecb_expect_false (cond)
1211#define expect_true(cond) ecb_expect_true (cond)
1212#define noinline ecb_noinline
1213
305#define inline_size static inline 1214#define inline_size ecb_inline
306 1215
307#if EV_MINIMAL 1216#if EV_FEATURE_CODE
1217# define inline_speed ecb_inline
1218#else
308# define inline_speed static noinline 1219# define inline_speed static noinline
1220#endif
1221
1222#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1223
1224#if EV_MINPRI == EV_MAXPRI
1225# define ABSPRI(w) (((W)w), 0)
309#else 1226#else
310# define inline_speed static inline
311#endif
312
313#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
314#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1227# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1228#endif
315 1229
316#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1230#define EMPTY /* required for microsofts broken pseudo-c compiler */
317#define EMPTY2(a,b) /* used to suppress some warnings */ 1231#define EMPTY2(a,b) /* used to suppress some warnings */
318 1232
319typedef ev_watcher *W; 1233typedef ev_watcher *W;
320typedef ev_watcher_list *WL; 1234typedef ev_watcher_list *WL;
321typedef ev_watcher_time *WT; 1235typedef ev_watcher_time *WT;
322 1236
1237#define ev_active(w) ((W)(w))->active
1238#define ev_at(w) ((WT)(w))->at
1239
1240#if EV_USE_REALTIME
1241/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1242/* giving it a reasonably high chance of working on typical architectures */
1243static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1244#endif
1245
323#if EV_USE_MONOTONIC 1246#if EV_USE_MONOTONIC
324/* sig_atomic_t is used to avoid per-thread variables or locking but still */
325/* giving it a reasonably high chance of working on typical architetcures */
326static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1247static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1248#endif
1249
1250#ifndef EV_FD_TO_WIN32_HANDLE
1251# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1252#endif
1253#ifndef EV_WIN32_HANDLE_TO_FD
1254# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1255#endif
1256#ifndef EV_WIN32_CLOSE_FD
1257# define EV_WIN32_CLOSE_FD(fd) close (fd)
327#endif 1258#endif
328 1259
329#ifdef _WIN32 1260#ifdef _WIN32
330# include "ev_win32.c" 1261# include "ev_win32.c"
331#endif 1262#endif
332 1263
333/*****************************************************************************/ 1264/*****************************************************************************/
334 1265
1266/* define a suitable floor function (only used by periodics atm) */
1267
1268#if EV_USE_FLOOR
1269# include <math.h>
1270# define ev_floor(v) floor (v)
1271#else
1272
1273#include <float.h>
1274
1275/* a floor() replacement function, should be independent of ev_tstamp type */
1276static ev_tstamp noinline
1277ev_floor (ev_tstamp v)
1278{
1279 /* the choice of shift factor is not terribly important */
1280#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1281 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1282#else
1283 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1284#endif
1285
1286 /* argument too large for an unsigned long? */
1287 if (expect_false (v >= shift))
1288 {
1289 ev_tstamp f;
1290
1291 if (v == v - 1.)
1292 return v; /* very large number */
1293
1294 f = shift * ev_floor (v * (1. / shift));
1295 return f + ev_floor (v - f);
1296 }
1297
1298 /* special treatment for negative args? */
1299 if (expect_false (v < 0.))
1300 {
1301 ev_tstamp f = -ev_floor (-v);
1302
1303 return f - (f == v ? 0 : 1);
1304 }
1305
1306 /* fits into an unsigned long */
1307 return (unsigned long)v;
1308}
1309
1310#endif
1311
1312/*****************************************************************************/
1313
1314#ifdef __linux
1315# include <sys/utsname.h>
1316#endif
1317
1318static unsigned int noinline ecb_cold
1319ev_linux_version (void)
1320{
1321#ifdef __linux
1322 unsigned int v = 0;
1323 struct utsname buf;
1324 int i;
1325 char *p = buf.release;
1326
1327 if (uname (&buf))
1328 return 0;
1329
1330 for (i = 3+1; --i; )
1331 {
1332 unsigned int c = 0;
1333
1334 for (;;)
1335 {
1336 if (*p >= '0' && *p <= '9')
1337 c = c * 10 + *p++ - '0';
1338 else
1339 {
1340 p += *p == '.';
1341 break;
1342 }
1343 }
1344
1345 v = (v << 8) | c;
1346 }
1347
1348 return v;
1349#else
1350 return 0;
1351#endif
1352}
1353
1354/*****************************************************************************/
1355
1356#if EV_AVOID_STDIO
1357static void noinline ecb_cold
1358ev_printerr (const char *msg)
1359{
1360 write (STDERR_FILENO, msg, strlen (msg));
1361}
1362#endif
1363
335static void (*syserr_cb)(const char *msg); 1364static void (*syserr_cb)(const char *msg) EV_THROW;
336 1365
337void 1366void ecb_cold
338ev_set_syserr_cb (void (*cb)(const char *msg)) 1367ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
339{ 1368{
340 syserr_cb = cb; 1369 syserr_cb = cb;
341} 1370}
342 1371
343static void noinline 1372static void noinline ecb_cold
344syserr (const char *msg) 1373ev_syserr (const char *msg)
345{ 1374{
346 if (!msg) 1375 if (!msg)
347 msg = "(libev) system error"; 1376 msg = "(libev) system error";
348 1377
349 if (syserr_cb) 1378 if (syserr_cb)
350 syserr_cb (msg); 1379 syserr_cb (msg);
351 else 1380 else
352 { 1381 {
1382#if EV_AVOID_STDIO
1383 ev_printerr (msg);
1384 ev_printerr (": ");
1385 ev_printerr (strerror (errno));
1386 ev_printerr ("\n");
1387#else
353 perror (msg); 1388 perror (msg);
1389#endif
354 abort (); 1390 abort ();
355 } 1391 }
356} 1392}
357 1393
1394static void *
1395ev_realloc_emul (void *ptr, long size) EV_THROW
1396{
1397 /* some systems, notably openbsd and darwin, fail to properly
1398 * implement realloc (x, 0) (as required by both ansi c-89 and
1399 * the single unix specification, so work around them here.
1400 * recently, also (at least) fedora and debian started breaking it,
1401 * despite documenting it otherwise.
1402 */
1403
1404 if (size)
1405 return realloc (ptr, size);
1406
1407 free (ptr);
1408 return 0;
1409}
1410
358static void *(*alloc)(void *ptr, long size); 1411static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
359 1412
360void 1413void ecb_cold
361ev_set_allocator (void *(*cb)(void *ptr, long size)) 1414ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
362{ 1415{
363 alloc = cb; 1416 alloc = cb;
364} 1417}
365 1418
366inline_speed void * 1419inline_speed void *
367ev_realloc (void *ptr, long size) 1420ev_realloc (void *ptr, long size)
368{ 1421{
369 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1422 ptr = alloc (ptr, size);
370 1423
371 if (!ptr && size) 1424 if (!ptr && size)
372 { 1425 {
1426#if EV_AVOID_STDIO
1427 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1428#else
373 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1429 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1430#endif
374 abort (); 1431 abort ();
375 } 1432 }
376 1433
377 return ptr; 1434 return ptr;
378} 1435}
… …
380#define ev_malloc(size) ev_realloc (0, (size)) 1437#define ev_malloc(size) ev_realloc (0, (size))
381#define ev_free(ptr) ev_realloc ((ptr), 0) 1438#define ev_free(ptr) ev_realloc ((ptr), 0)
382 1439
383/*****************************************************************************/ 1440/*****************************************************************************/
384 1441
1442/* set in reify when reification needed */
1443#define EV_ANFD_REIFY 1
1444
1445/* file descriptor info structure */
385typedef struct 1446typedef struct
386{ 1447{
387 WL head; 1448 WL head;
388 unsigned char events; 1449 unsigned char events; /* the events watched for */
1450 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1451 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
389 unsigned char reify; 1452 unsigned char unused;
1453#if EV_USE_EPOLL
1454 unsigned int egen; /* generation counter to counter epoll bugs */
1455#endif
390#if EV_SELECT_IS_WINSOCKET 1456#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
391 SOCKET handle; 1457 SOCKET handle;
392#endif 1458#endif
1459#if EV_USE_IOCP
1460 OVERLAPPED or, ow;
1461#endif
393} ANFD; 1462} ANFD;
394 1463
1464/* stores the pending event set for a given watcher */
395typedef struct 1465typedef struct
396{ 1466{
397 W w; 1467 W w;
398 int events; 1468 int events; /* the pending event set for the given watcher */
399} ANPENDING; 1469} ANPENDING;
400 1470
401#if EV_USE_INOTIFY 1471#if EV_USE_INOTIFY
1472/* hash table entry per inotify-id */
402typedef struct 1473typedef struct
403{ 1474{
404 WL head; 1475 WL head;
405} ANFS; 1476} ANFS;
1477#endif
1478
1479/* Heap Entry */
1480#if EV_HEAP_CACHE_AT
1481 /* a heap element */
1482 typedef struct {
1483 ev_tstamp at;
1484 WT w;
1485 } ANHE;
1486
1487 #define ANHE_w(he) (he).w /* access watcher, read-write */
1488 #define ANHE_at(he) (he).at /* access cached at, read-only */
1489 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1490#else
1491 /* a heap element */
1492 typedef WT ANHE;
1493
1494 #define ANHE_w(he) (he)
1495 #define ANHE_at(he) (he)->at
1496 #define ANHE_at_cache(he)
406#endif 1497#endif
407 1498
408#if EV_MULTIPLICITY 1499#if EV_MULTIPLICITY
409 1500
410 struct ev_loop 1501 struct ev_loop
… …
416 #undef VAR 1507 #undef VAR
417 }; 1508 };
418 #include "ev_wrap.h" 1509 #include "ev_wrap.h"
419 1510
420 static struct ev_loop default_loop_struct; 1511 static struct ev_loop default_loop_struct;
421 struct ev_loop *ev_default_loop_ptr; 1512 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
422 1513
423#else 1514#else
424 1515
425 ev_tstamp ev_rt_now; 1516 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
426 #define VAR(name,decl) static decl; 1517 #define VAR(name,decl) static decl;
427 #include "ev_vars.h" 1518 #include "ev_vars.h"
428 #undef VAR 1519 #undef VAR
429 1520
430 static int ev_default_loop_ptr; 1521 static int ev_default_loop_ptr;
431 1522
432#endif 1523#endif
433 1524
1525#if EV_FEATURE_API
1526# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1527# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1528# define EV_INVOKE_PENDING invoke_cb (EV_A)
1529#else
1530# define EV_RELEASE_CB (void)0
1531# define EV_ACQUIRE_CB (void)0
1532# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1533#endif
1534
1535#define EVBREAK_RECURSE 0x80
1536
434/*****************************************************************************/ 1537/*****************************************************************************/
435 1538
1539#ifndef EV_HAVE_EV_TIME
436ev_tstamp 1540ev_tstamp
437ev_time (void) 1541ev_time (void) EV_THROW
438{ 1542{
439#if EV_USE_REALTIME 1543#if EV_USE_REALTIME
1544 if (expect_true (have_realtime))
1545 {
440 struct timespec ts; 1546 struct timespec ts;
441 clock_gettime (CLOCK_REALTIME, &ts); 1547 clock_gettime (CLOCK_REALTIME, &ts);
442 return ts.tv_sec + ts.tv_nsec * 1e-9; 1548 return ts.tv_sec + ts.tv_nsec * 1e-9;
443#else 1549 }
1550#endif
1551
444 struct timeval tv; 1552 struct timeval tv;
445 gettimeofday (&tv, 0); 1553 gettimeofday (&tv, 0);
446 return tv.tv_sec + tv.tv_usec * 1e-6; 1554 return tv.tv_sec + tv.tv_usec * 1e-6;
447#endif
448} 1555}
1556#endif
449 1557
450ev_tstamp inline_size 1558inline_size ev_tstamp
451get_clock (void) 1559get_clock (void)
452{ 1560{
453#if EV_USE_MONOTONIC 1561#if EV_USE_MONOTONIC
454 if (expect_true (have_monotonic)) 1562 if (expect_true (have_monotonic))
455 { 1563 {
… …
462 return ev_time (); 1570 return ev_time ();
463} 1571}
464 1572
465#if EV_MULTIPLICITY 1573#if EV_MULTIPLICITY
466ev_tstamp 1574ev_tstamp
467ev_now (EV_P) 1575ev_now (EV_P) EV_THROW
468{ 1576{
469 return ev_rt_now; 1577 return ev_rt_now;
470} 1578}
471#endif 1579#endif
472 1580
473void 1581void
474ev_sleep (ev_tstamp delay) 1582ev_sleep (ev_tstamp delay) EV_THROW
475{ 1583{
476 if (delay > 0.) 1584 if (delay > 0.)
477 { 1585 {
478#if EV_USE_NANOSLEEP 1586#if EV_USE_NANOSLEEP
479 struct timespec ts; 1587 struct timespec ts;
480 1588
481 ts.tv_sec = (time_t)delay; 1589 EV_TS_SET (ts, delay);
482 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
483
484 nanosleep (&ts, 0); 1590 nanosleep (&ts, 0);
485#elif defined(_WIN32) 1591#elif defined _WIN32
486 Sleep ((unsigned long)(delay * 1e3)); 1592 Sleep ((unsigned long)(delay * 1e3));
487#else 1593#else
488 struct timeval tv; 1594 struct timeval tv;
489 1595
490 tv.tv_sec = (time_t)delay; 1596 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
491 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1597 /* something not guaranteed by newer posix versions, but guaranteed */
492 1598 /* by older ones */
1599 EV_TV_SET (tv, delay);
493 select (0, 0, 0, 0, &tv); 1600 select (0, 0, 0, 0, &tv);
494#endif 1601#endif
495 } 1602 }
496} 1603}
497 1604
498/*****************************************************************************/ 1605/*****************************************************************************/
499 1606
500int inline_size 1607#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1608
1609/* find a suitable new size for the given array, */
1610/* hopefully by rounding to a nice-to-malloc size */
1611inline_size int
501array_nextsize (int elem, int cur, int cnt) 1612array_nextsize (int elem, int cur, int cnt)
502{ 1613{
503 int ncur = cur + 1; 1614 int ncur = cur + 1;
504 1615
505 do 1616 do
506 ncur <<= 1; 1617 ncur <<= 1;
507 while (cnt > ncur); 1618 while (cnt > ncur);
508 1619
509 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1620 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
510 if (elem * ncur > 4096) 1621 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
511 { 1622 {
512 ncur *= elem; 1623 ncur *= elem;
513 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1624 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
514 ncur = ncur - sizeof (void *) * 4; 1625 ncur = ncur - sizeof (void *) * 4;
515 ncur /= elem; 1626 ncur /= elem;
516 } 1627 }
517 1628
518 return ncur; 1629 return ncur;
519} 1630}
520 1631
521static noinline void * 1632static void * noinline ecb_cold
522array_realloc (int elem, void *base, int *cur, int cnt) 1633array_realloc (int elem, void *base, int *cur, int cnt)
523{ 1634{
524 *cur = array_nextsize (elem, *cur, cnt); 1635 *cur = array_nextsize (elem, *cur, cnt);
525 return ev_realloc (base, elem * *cur); 1636 return ev_realloc (base, elem * *cur);
526} 1637}
1638
1639#define array_init_zero(base,count) \
1640 memset ((void *)(base), 0, sizeof (*(base)) * (count))
527 1641
528#define array_needsize(type,base,cur,cnt,init) \ 1642#define array_needsize(type,base,cur,cnt,init) \
529 if (expect_false ((cnt) > (cur))) \ 1643 if (expect_false ((cnt) > (cur))) \
530 { \ 1644 { \
531 int ocur_ = (cur); \ 1645 int ecb_unused ocur_ = (cur); \
532 (base) = (type *)array_realloc \ 1646 (base) = (type *)array_realloc \
533 (sizeof (type), (base), &(cur), (cnt)); \ 1647 (sizeof (type), (base), &(cur), (cnt)); \
534 init ((base) + (ocur_), (cur) - ocur_); \ 1648 init ((base) + (ocur_), (cur) - ocur_); \
535 } 1649 }
536 1650
… …
543 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1657 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
544 } 1658 }
545#endif 1659#endif
546 1660
547#define array_free(stem, idx) \ 1661#define array_free(stem, idx) \
548 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1662 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
549 1663
550/*****************************************************************************/ 1664/*****************************************************************************/
551 1665
1666/* dummy callback for pending events */
1667static void noinline
1668pendingcb (EV_P_ ev_prepare *w, int revents)
1669{
1670}
1671
552void noinline 1672void noinline
553ev_feed_event (EV_P_ void *w, int revents) 1673ev_feed_event (EV_P_ void *w, int revents) EV_THROW
554{ 1674{
555 W w_ = (W)w; 1675 W w_ = (W)w;
556 int pri = ABSPRI (w_); 1676 int pri = ABSPRI (w_);
557 1677
558 if (expect_false (w_->pending)) 1678 if (expect_false (w_->pending))
… …
562 w_->pending = ++pendingcnt [pri]; 1682 w_->pending = ++pendingcnt [pri];
563 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1683 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
564 pendings [pri][w_->pending - 1].w = w_; 1684 pendings [pri][w_->pending - 1].w = w_;
565 pendings [pri][w_->pending - 1].events = revents; 1685 pendings [pri][w_->pending - 1].events = revents;
566 } 1686 }
567}
568 1687
569void inline_speed 1688 pendingpri = NUMPRI - 1;
1689}
1690
1691inline_speed void
1692feed_reverse (EV_P_ W w)
1693{
1694 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1695 rfeeds [rfeedcnt++] = w;
1696}
1697
1698inline_size void
1699feed_reverse_done (EV_P_ int revents)
1700{
1701 do
1702 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1703 while (rfeedcnt);
1704}
1705
1706inline_speed void
570queue_events (EV_P_ W *events, int eventcnt, int type) 1707queue_events (EV_P_ W *events, int eventcnt, int type)
571{ 1708{
572 int i; 1709 int i;
573 1710
574 for (i = 0; i < eventcnt; ++i) 1711 for (i = 0; i < eventcnt; ++i)
575 ev_feed_event (EV_A_ events [i], type); 1712 ev_feed_event (EV_A_ events [i], type);
576} 1713}
577 1714
578/*****************************************************************************/ 1715/*****************************************************************************/
579 1716
580void inline_size 1717inline_speed void
581anfds_init (ANFD *base, int count)
582{
583 while (count--)
584 {
585 base->head = 0;
586 base->events = EV_NONE;
587 base->reify = 0;
588
589 ++base;
590 }
591}
592
593void inline_speed
594fd_event (EV_P_ int fd, int revents) 1718fd_event_nocheck (EV_P_ int fd, int revents)
595{ 1719{
596 ANFD *anfd = anfds + fd; 1720 ANFD *anfd = anfds + fd;
597 ev_io *w; 1721 ev_io *w;
598 1722
599 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1723 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
603 if (ev) 1727 if (ev)
604 ev_feed_event (EV_A_ (W)w, ev); 1728 ev_feed_event (EV_A_ (W)w, ev);
605 } 1729 }
606} 1730}
607 1731
1732/* do not submit kernel events for fds that have reify set */
1733/* because that means they changed while we were polling for new events */
1734inline_speed void
1735fd_event (EV_P_ int fd, int revents)
1736{
1737 ANFD *anfd = anfds + fd;
1738
1739 if (expect_true (!anfd->reify))
1740 fd_event_nocheck (EV_A_ fd, revents);
1741}
1742
608void 1743void
609ev_feed_fd_event (EV_P_ int fd, int revents) 1744ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
610{ 1745{
611 if (fd >= 0 && fd < anfdmax) 1746 if (fd >= 0 && fd < anfdmax)
612 fd_event (EV_A_ fd, revents); 1747 fd_event_nocheck (EV_A_ fd, revents);
613} 1748}
614 1749
615void inline_size 1750/* make sure the external fd watch events are in-sync */
1751/* with the kernel/libev internal state */
1752inline_size void
616fd_reify (EV_P) 1753fd_reify (EV_P)
617{ 1754{
618 int i; 1755 int i;
1756
1757#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1758 for (i = 0; i < fdchangecnt; ++i)
1759 {
1760 int fd = fdchanges [i];
1761 ANFD *anfd = anfds + fd;
1762
1763 if (anfd->reify & EV__IOFDSET && anfd->head)
1764 {
1765 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1766
1767 if (handle != anfd->handle)
1768 {
1769 unsigned long arg;
1770
1771 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1772
1773 /* handle changed, but fd didn't - we need to do it in two steps */
1774 backend_modify (EV_A_ fd, anfd->events, 0);
1775 anfd->events = 0;
1776 anfd->handle = handle;
1777 }
1778 }
1779 }
1780#endif
619 1781
620 for (i = 0; i < fdchangecnt; ++i) 1782 for (i = 0; i < fdchangecnt; ++i)
621 { 1783 {
622 int fd = fdchanges [i]; 1784 int fd = fdchanges [i];
623 ANFD *anfd = anfds + fd; 1785 ANFD *anfd = anfds + fd;
624 ev_io *w; 1786 ev_io *w;
625 1787
626 unsigned char events = 0; 1788 unsigned char o_events = anfd->events;
1789 unsigned char o_reify = anfd->reify;
627 1790
628 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1791 anfd->reify = 0;
629 events |= (unsigned char)w->events;
630 1792
631#if EV_SELECT_IS_WINSOCKET 1793 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
632 if (events)
633 { 1794 {
634 unsigned long argp; 1795 anfd->events = 0;
635 #ifdef EV_FD_TO_WIN32_HANDLE 1796
636 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1797 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
637 #else 1798 anfd->events |= (unsigned char)w->events;
638 anfd->handle = _get_osfhandle (fd); 1799
639 #endif 1800 if (o_events != anfd->events)
640 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1801 o_reify = EV__IOFDSET; /* actually |= */
641 } 1802 }
642#endif
643 1803
644 { 1804 if (o_reify & EV__IOFDSET)
645 unsigned char o_events = anfd->events;
646 unsigned char o_reify = anfd->reify;
647
648 anfd->reify = 0;
649 anfd->events = events;
650
651 if (o_events != events || o_reify & EV_IOFDSET)
652 backend_modify (EV_A_ fd, o_events, events); 1805 backend_modify (EV_A_ fd, o_events, anfd->events);
653 }
654 } 1806 }
655 1807
656 fdchangecnt = 0; 1808 fdchangecnt = 0;
657} 1809}
658 1810
659void inline_size 1811/* something about the given fd changed */
1812inline_size void
660fd_change (EV_P_ int fd, int flags) 1813fd_change (EV_P_ int fd, int flags)
661{ 1814{
662 unsigned char reify = anfds [fd].reify; 1815 unsigned char reify = anfds [fd].reify;
663 anfds [fd].reify |= flags; 1816 anfds [fd].reify |= flags;
664 1817
… …
668 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1821 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
669 fdchanges [fdchangecnt - 1] = fd; 1822 fdchanges [fdchangecnt - 1] = fd;
670 } 1823 }
671} 1824}
672 1825
673void inline_speed 1826/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1827inline_speed void ecb_cold
674fd_kill (EV_P_ int fd) 1828fd_kill (EV_P_ int fd)
675{ 1829{
676 ev_io *w; 1830 ev_io *w;
677 1831
678 while ((w = (ev_io *)anfds [fd].head)) 1832 while ((w = (ev_io *)anfds [fd].head))
… …
680 ev_io_stop (EV_A_ w); 1834 ev_io_stop (EV_A_ w);
681 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1835 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
682 } 1836 }
683} 1837}
684 1838
685int inline_size 1839/* check whether the given fd is actually valid, for error recovery */
1840inline_size int ecb_cold
686fd_valid (int fd) 1841fd_valid (int fd)
687{ 1842{
688#ifdef _WIN32 1843#ifdef _WIN32
689 return _get_osfhandle (fd) != -1; 1844 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
690#else 1845#else
691 return fcntl (fd, F_GETFD) != -1; 1846 return fcntl (fd, F_GETFD) != -1;
692#endif 1847#endif
693} 1848}
694 1849
695/* called on EBADF to verify fds */ 1850/* called on EBADF to verify fds */
696static void noinline 1851static void noinline ecb_cold
697fd_ebadf (EV_P) 1852fd_ebadf (EV_P)
698{ 1853{
699 int fd; 1854 int fd;
700 1855
701 for (fd = 0; fd < anfdmax; ++fd) 1856 for (fd = 0; fd < anfdmax; ++fd)
702 if (anfds [fd].events) 1857 if (anfds [fd].events)
703 if (!fd_valid (fd) == -1 && errno == EBADF) 1858 if (!fd_valid (fd) && errno == EBADF)
704 fd_kill (EV_A_ fd); 1859 fd_kill (EV_A_ fd);
705} 1860}
706 1861
707/* called on ENOMEM in select/poll to kill some fds and retry */ 1862/* called on ENOMEM in select/poll to kill some fds and retry */
708static void noinline 1863static void noinline ecb_cold
709fd_enomem (EV_P) 1864fd_enomem (EV_P)
710{ 1865{
711 int fd; 1866 int fd;
712 1867
713 for (fd = anfdmax; fd--; ) 1868 for (fd = anfdmax; fd--; )
714 if (anfds [fd].events) 1869 if (anfds [fd].events)
715 { 1870 {
716 fd_kill (EV_A_ fd); 1871 fd_kill (EV_A_ fd);
717 return; 1872 break;
718 } 1873 }
719} 1874}
720 1875
721/* usually called after fork if backend needs to re-arm all fds from scratch */ 1876/* usually called after fork if backend needs to re-arm all fds from scratch */
722static void noinline 1877static void noinline
… …
726 1881
727 for (fd = 0; fd < anfdmax; ++fd) 1882 for (fd = 0; fd < anfdmax; ++fd)
728 if (anfds [fd].events) 1883 if (anfds [fd].events)
729 { 1884 {
730 anfds [fd].events = 0; 1885 anfds [fd].events = 0;
1886 anfds [fd].emask = 0;
731 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1887 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
732 } 1888 }
733} 1889}
734 1890
735/*****************************************************************************/ 1891/* used to prepare libev internal fd's */
736 1892/* this is not fork-safe */
737void inline_speed 1893inline_speed void
738upheap (WT *heap, int k)
739{
740 WT w = heap [k];
741
742 while (k)
743 {
744 int p = (k - 1) >> 1;
745
746 if (heap [p]->at <= w->at)
747 break;
748
749 heap [k] = heap [p];
750 ((W)heap [k])->active = k + 1;
751 k = p;
752 }
753
754 heap [k] = w;
755 ((W)heap [k])->active = k + 1;
756}
757
758void inline_speed
759downheap (WT *heap, int N, int k)
760{
761 WT w = heap [k];
762
763 for (;;)
764 {
765 int c = (k << 1) + 1;
766
767 if (c >= N)
768 break;
769
770 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
771 ? 1 : 0;
772
773 if (w->at <= heap [c]->at)
774 break;
775
776 heap [k] = heap [c];
777 ((W)heap [k])->active = k + 1;
778
779 k = c;
780 }
781
782 heap [k] = w;
783 ((W)heap [k])->active = k + 1;
784}
785
786void inline_size
787adjustheap (WT *heap, int N, int k)
788{
789 upheap (heap, k);
790 downheap (heap, N, k);
791}
792
793/*****************************************************************************/
794
795typedef struct
796{
797 WL head;
798 EV_ATOMIC_T gotsig;
799} ANSIG;
800
801static ANSIG *signals;
802static int signalmax;
803
804static EV_ATOMIC_T gotsig;
805
806void inline_size
807signals_init (ANSIG *base, int count)
808{
809 while (count--)
810 {
811 base->head = 0;
812 base->gotsig = 0;
813
814 ++base;
815 }
816}
817
818/*****************************************************************************/
819
820void inline_speed
821fd_intern (int fd) 1894fd_intern (int fd)
822{ 1895{
823#ifdef _WIN32 1896#ifdef _WIN32
824 int arg = 1; 1897 unsigned long arg = 1;
825 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1898 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
826#else 1899#else
827 fcntl (fd, F_SETFD, FD_CLOEXEC); 1900 fcntl (fd, F_SETFD, FD_CLOEXEC);
828 fcntl (fd, F_SETFL, O_NONBLOCK); 1901 fcntl (fd, F_SETFL, O_NONBLOCK);
829#endif 1902#endif
830} 1903}
831 1904
832static void noinline 1905/*****************************************************************************/
833evpipe_init (EV_P) 1906
1907/*
1908 * the heap functions want a real array index. array index 0 is guaranteed to not
1909 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1910 * the branching factor of the d-tree.
1911 */
1912
1913/*
1914 * at the moment we allow libev the luxury of two heaps,
1915 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1916 * which is more cache-efficient.
1917 * the difference is about 5% with 50000+ watchers.
1918 */
1919#if EV_USE_4HEAP
1920
1921#define DHEAP 4
1922#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1923#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1924#define UPHEAP_DONE(p,k) ((p) == (k))
1925
1926/* away from the root */
1927inline_speed void
1928downheap (ANHE *heap, int N, int k)
834{ 1929{
835 if (!ev_is_active (&pipeev)) 1930 ANHE he = heap [k];
1931 ANHE *E = heap + N + HEAP0;
1932
1933 for (;;)
836 { 1934 {
837#if EV_USE_EVENTFD 1935 ev_tstamp minat;
838 if ((evfd = eventfd (0, 0)) >= 0) 1936 ANHE *minpos;
1937 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1938
1939 /* find minimum child */
1940 if (expect_true (pos + DHEAP - 1 < E))
839 { 1941 {
840 evpipe [0] = -1; 1942 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
841 fd_intern (evfd); 1943 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
842 ev_io_set (&pipeev, evfd, EV_READ); 1944 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1945 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1946 }
1947 else if (pos < E)
1948 {
1949 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1950 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1951 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1952 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
843 } 1953 }
844 else 1954 else
1955 break;
1956
1957 if (ANHE_at (he) <= minat)
1958 break;
1959
1960 heap [k] = *minpos;
1961 ev_active (ANHE_w (*minpos)) = k;
1962
1963 k = minpos - heap;
1964 }
1965
1966 heap [k] = he;
1967 ev_active (ANHE_w (he)) = k;
1968}
1969
1970#else /* 4HEAP */
1971
1972#define HEAP0 1
1973#define HPARENT(k) ((k) >> 1)
1974#define UPHEAP_DONE(p,k) (!(p))
1975
1976/* away from the root */
1977inline_speed void
1978downheap (ANHE *heap, int N, int k)
1979{
1980 ANHE he = heap [k];
1981
1982 for (;;)
1983 {
1984 int c = k << 1;
1985
1986 if (c >= N + HEAP0)
1987 break;
1988
1989 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1990 ? 1 : 0;
1991
1992 if (ANHE_at (he) <= ANHE_at (heap [c]))
1993 break;
1994
1995 heap [k] = heap [c];
1996 ev_active (ANHE_w (heap [k])) = k;
1997
1998 k = c;
1999 }
2000
2001 heap [k] = he;
2002 ev_active (ANHE_w (he)) = k;
2003}
2004#endif
2005
2006/* towards the root */
2007inline_speed void
2008upheap (ANHE *heap, int k)
2009{
2010 ANHE he = heap [k];
2011
2012 for (;;)
2013 {
2014 int p = HPARENT (k);
2015
2016 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2017 break;
2018
2019 heap [k] = heap [p];
2020 ev_active (ANHE_w (heap [k])) = k;
2021 k = p;
2022 }
2023
2024 heap [k] = he;
2025 ev_active (ANHE_w (he)) = k;
2026}
2027
2028/* move an element suitably so it is in a correct place */
2029inline_size void
2030adjustheap (ANHE *heap, int N, int k)
2031{
2032 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2033 upheap (heap, k);
2034 else
2035 downheap (heap, N, k);
2036}
2037
2038/* rebuild the heap: this function is used only once and executed rarely */
2039inline_size void
2040reheap (ANHE *heap, int N)
2041{
2042 int i;
2043
2044 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2045 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2046 for (i = 0; i < N; ++i)
2047 upheap (heap, i + HEAP0);
2048}
2049
2050/*****************************************************************************/
2051
2052/* associate signal watchers to a signal signal */
2053typedef struct
2054{
2055 EV_ATOMIC_T pending;
2056#if EV_MULTIPLICITY
2057 EV_P;
2058#endif
2059 WL head;
2060} ANSIG;
2061
2062static ANSIG signals [EV_NSIG - 1];
2063
2064/*****************************************************************************/
2065
2066#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2067
2068static void noinline ecb_cold
2069evpipe_init (EV_P)
2070{
2071 if (!ev_is_active (&pipe_w))
2072 {
2073 int fds [2];
2074
2075# if EV_USE_EVENTFD
2076 fds [0] = -1;
2077 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2078 if (fds [1] < 0 && errno == EINVAL)
2079 fds [1] = eventfd (0, 0);
2080
2081 if (fds [1] < 0)
845#endif 2082# endif
846 { 2083 {
847 while (pipe (evpipe)) 2084 while (pipe (fds))
848 syserr ("(libev) error creating signal/async pipe"); 2085 ev_syserr ("(libev) error creating signal/async pipe");
849 2086
850 fd_intern (evpipe [0]); 2087 fd_intern (fds [0]);
851 fd_intern (evpipe [1]);
852 ev_io_set (&pipeev, evpipe [0], EV_READ);
853 } 2088 }
854 2089
2090 fd_intern (fds [1]);
2091
2092 evpipe [0] = fds [0];
2093
2094 if (evpipe [1] < 0)
2095 evpipe [1] = fds [1]; /* first call, set write fd */
2096 else
2097 {
2098 /* on subsequent calls, do not change evpipe [1] */
2099 /* so that evpipe_write can always rely on its value. */
2100 /* this branch does not do anything sensible on windows, */
2101 /* so must not be executed on windows */
2102
2103 dup2 (fds [1], evpipe [1]);
2104 close (fds [1]);
2105 }
2106
2107 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
855 ev_io_start (EV_A_ &pipeev); 2108 ev_io_start (EV_A_ &pipe_w);
856 ev_unref (EV_A); /* watcher should not keep loop alive */ 2109 ev_unref (EV_A); /* watcher should not keep loop alive */
857 } 2110 }
858} 2111}
859 2112
860void inline_size 2113inline_speed void
861evpipe_write (EV_P_ EV_ATOMIC_T *flag) 2114evpipe_write (EV_P_ EV_ATOMIC_T *flag)
862{ 2115{
863 if (!*flag) 2116 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2117
2118 if (expect_true (*flag))
2119 return;
2120
2121 *flag = 1;
2122 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2123
2124 pipe_write_skipped = 1;
2125
2126 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2127
2128 if (pipe_write_wanted)
864 { 2129 {
2130 int old_errno;
2131
2132 pipe_write_skipped = 0;
2133 ECB_MEMORY_FENCE_RELEASE;
2134
865 int old_errno = errno; /* save errno because write might clobber it */ 2135 old_errno = errno; /* save errno because write will clobber it */
866
867 *flag = 1;
868 2136
869#if EV_USE_EVENTFD 2137#if EV_USE_EVENTFD
870 if (evfd >= 0) 2138 if (evpipe [0] < 0)
871 { 2139 {
872 uint64_t counter = 1; 2140 uint64_t counter = 1;
873 write (evfd, &counter, sizeof (uint64_t)); 2141 write (evpipe [1], &counter, sizeof (uint64_t));
874 } 2142 }
875 else 2143 else
876#endif 2144#endif
2145 {
2146#ifdef _WIN32
2147 WSABUF buf;
2148 DWORD sent;
2149 buf.buf = &buf;
2150 buf.len = 1;
2151 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2152#else
877 write (evpipe [1], &old_errno, 1); 2153 write (evpipe [1], &(evpipe [1]), 1);
2154#endif
2155 }
878 2156
879 errno = old_errno; 2157 errno = old_errno;
880 } 2158 }
881} 2159}
882 2160
2161/* called whenever the libev signal pipe */
2162/* got some events (signal, async) */
883static void 2163static void
884pipecb (EV_P_ ev_io *iow, int revents) 2164pipecb (EV_P_ ev_io *iow, int revents)
885{ 2165{
2166 int i;
2167
2168 if (revents & EV_READ)
2169 {
886#if EV_USE_EVENTFD 2170#if EV_USE_EVENTFD
887 if (evfd >= 0) 2171 if (evpipe [0] < 0)
888 { 2172 {
889 uint64_t counter = 1; 2173 uint64_t counter;
890 read (evfd, &counter, sizeof (uint64_t)); 2174 read (evpipe [1], &counter, sizeof (uint64_t));
891 } 2175 }
892 else 2176 else
893#endif 2177#endif
894 { 2178 {
895 char dummy; 2179 char dummy[4];
2180#ifdef _WIN32
2181 WSABUF buf;
2182 DWORD recvd;
2183 DWORD flags = 0;
2184 buf.buf = dummy;
2185 buf.len = sizeof (dummy);
2186 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2187#else
896 read (evpipe [0], &dummy, 1); 2188 read (evpipe [0], &dummy, sizeof (dummy));
2189#endif
2190 }
2191 }
2192
2193 pipe_write_skipped = 0;
2194
2195 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2196
2197#if EV_SIGNAL_ENABLE
2198 if (sig_pending)
897 } 2199 {
2200 sig_pending = 0;
898 2201
899 if (gotsig && ev_is_default_loop (EV_A)) 2202 ECB_MEMORY_FENCE;
900 {
901 int signum;
902 gotsig = 0;
903 2203
904 for (signum = signalmax; signum--; ) 2204 for (i = EV_NSIG - 1; i--; )
905 if (signals [signum].gotsig) 2205 if (expect_false (signals [i].pending))
906 ev_feed_signal_event (EV_A_ signum + 1); 2206 ev_feed_signal_event (EV_A_ i + 1);
907 } 2207 }
2208#endif
908 2209
909#if EV_ASYNC_ENABLE 2210#if EV_ASYNC_ENABLE
910 if (gotasync) 2211 if (async_pending)
911 { 2212 {
912 int i; 2213 async_pending = 0;
913 gotasync = 0; 2214
2215 ECB_MEMORY_FENCE;
914 2216
915 for (i = asynccnt; i--; ) 2217 for (i = asynccnt; i--; )
916 if (asyncs [i]->sent) 2218 if (asyncs [i]->sent)
917 { 2219 {
918 asyncs [i]->sent = 0; 2220 asyncs [i]->sent = 0;
2221 ECB_MEMORY_FENCE_RELEASE;
919 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2222 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
920 } 2223 }
921 } 2224 }
922#endif 2225#endif
923} 2226}
924 2227
925/*****************************************************************************/ 2228/*****************************************************************************/
926 2229
2230void
2231ev_feed_signal (int signum) EV_THROW
2232{
2233#if EV_MULTIPLICITY
2234 ECB_MEMORY_FENCE_ACQUIRE;
2235 EV_P = signals [signum - 1].loop;
2236
2237 if (!EV_A)
2238 return;
2239#endif
2240
2241 signals [signum - 1].pending = 1;
2242 evpipe_write (EV_A_ &sig_pending);
2243}
2244
927static void 2245static void
928ev_sighandler (int signum) 2246ev_sighandler (int signum)
929{ 2247{
2248#ifdef _WIN32
2249 signal (signum, ev_sighandler);
2250#endif
2251
2252 ev_feed_signal (signum);
2253}
2254
2255void noinline
2256ev_feed_signal_event (EV_P_ int signum) EV_THROW
2257{
2258 WL w;
2259
2260 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2261 return;
2262
2263 --signum;
2264
930#if EV_MULTIPLICITY 2265#if EV_MULTIPLICITY
931 struct ev_loop *loop = &default_loop_struct; 2266 /* it is permissible to try to feed a signal to the wrong loop */
932#endif 2267 /* or, likely more useful, feeding a signal nobody is waiting for */
933 2268
934#if _WIN32 2269 if (expect_false (signals [signum].loop != EV_A))
935 signal (signum, ev_sighandler);
936#endif
937
938 signals [signum - 1].gotsig = 1;
939 evpipe_write (EV_A_ &gotsig);
940}
941
942void noinline
943ev_feed_signal_event (EV_P_ int signum)
944{
945 WL w;
946
947#if EV_MULTIPLICITY
948 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
949#endif
950
951 --signum;
952
953 if (signum < 0 || signum >= signalmax)
954 return; 2270 return;
2271#endif
955 2272
956 signals [signum].gotsig = 0; 2273 signals [signum].pending = 0;
2274 ECB_MEMORY_FENCE_RELEASE;
957 2275
958 for (w = signals [signum].head; w; w = w->next) 2276 for (w = signals [signum].head; w; w = w->next)
959 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2277 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
960} 2278}
961 2279
2280#if EV_USE_SIGNALFD
2281static void
2282sigfdcb (EV_P_ ev_io *iow, int revents)
2283{
2284 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2285
2286 for (;;)
2287 {
2288 ssize_t res = read (sigfd, si, sizeof (si));
2289
2290 /* not ISO-C, as res might be -1, but works with SuS */
2291 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2292 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2293
2294 if (res < (ssize_t)sizeof (si))
2295 break;
2296 }
2297}
2298#endif
2299
2300#endif
2301
962/*****************************************************************************/ 2302/*****************************************************************************/
963 2303
2304#if EV_CHILD_ENABLE
964static WL childs [EV_PID_HASHSIZE]; 2305static WL childs [EV_PID_HASHSIZE];
965
966#ifndef _WIN32
967 2306
968static ev_signal childev; 2307static ev_signal childev;
969 2308
970#ifndef WIFCONTINUED 2309#ifndef WIFCONTINUED
971# define WIFCONTINUED(status) 0 2310# define WIFCONTINUED(status) 0
972#endif 2311#endif
973 2312
974void inline_speed 2313/* handle a single child status event */
2314inline_speed void
975child_reap (EV_P_ int chain, int pid, int status) 2315child_reap (EV_P_ int chain, int pid, int status)
976{ 2316{
977 ev_child *w; 2317 ev_child *w;
978 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2318 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
979 2319
980 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2320 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
981 { 2321 {
982 if ((w->pid == pid || !w->pid) 2322 if ((w->pid == pid || !w->pid)
983 && (!traced || (w->flags & 1))) 2323 && (!traced || (w->flags & 1)))
984 { 2324 {
985 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2325 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
992 2332
993#ifndef WCONTINUED 2333#ifndef WCONTINUED
994# define WCONTINUED 0 2334# define WCONTINUED 0
995#endif 2335#endif
996 2336
2337/* called on sigchld etc., calls waitpid */
997static void 2338static void
998childcb (EV_P_ ev_signal *sw, int revents) 2339childcb (EV_P_ ev_signal *sw, int revents)
999{ 2340{
1000 int pid, status; 2341 int pid, status;
1001 2342
… …
1009 /* make sure we are called again until all children have been reaped */ 2350 /* make sure we are called again until all children have been reaped */
1010 /* we need to do it this way so that the callback gets called before we continue */ 2351 /* we need to do it this way so that the callback gets called before we continue */
1011 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2352 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1012 2353
1013 child_reap (EV_A_ pid, pid, status); 2354 child_reap (EV_A_ pid, pid, status);
1014 if (EV_PID_HASHSIZE > 1) 2355 if ((EV_PID_HASHSIZE) > 1)
1015 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2356 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1016} 2357}
1017 2358
1018#endif 2359#endif
1019 2360
1020/*****************************************************************************/ 2361/*****************************************************************************/
1021 2362
2363#if EV_USE_IOCP
2364# include "ev_iocp.c"
2365#endif
1022#if EV_USE_PORT 2366#if EV_USE_PORT
1023# include "ev_port.c" 2367# include "ev_port.c"
1024#endif 2368#endif
1025#if EV_USE_KQUEUE 2369#if EV_USE_KQUEUE
1026# include "ev_kqueue.c" 2370# include "ev_kqueue.c"
… …
1033#endif 2377#endif
1034#if EV_USE_SELECT 2378#if EV_USE_SELECT
1035# include "ev_select.c" 2379# include "ev_select.c"
1036#endif 2380#endif
1037 2381
1038int 2382int ecb_cold
1039ev_version_major (void) 2383ev_version_major (void) EV_THROW
1040{ 2384{
1041 return EV_VERSION_MAJOR; 2385 return EV_VERSION_MAJOR;
1042} 2386}
1043 2387
1044int 2388int ecb_cold
1045ev_version_minor (void) 2389ev_version_minor (void) EV_THROW
1046{ 2390{
1047 return EV_VERSION_MINOR; 2391 return EV_VERSION_MINOR;
1048} 2392}
1049 2393
1050/* return true if we are running with elevated privileges and should ignore env variables */ 2394/* return true if we are running with elevated privileges and should ignore env variables */
1051int inline_size 2395int inline_size ecb_cold
1052enable_secure (void) 2396enable_secure (void)
1053{ 2397{
1054#ifdef _WIN32 2398#ifdef _WIN32
1055 return 0; 2399 return 0;
1056#else 2400#else
1057 return getuid () != geteuid () 2401 return getuid () != geteuid ()
1058 || getgid () != getegid (); 2402 || getgid () != getegid ();
1059#endif 2403#endif
1060} 2404}
1061 2405
1062unsigned int 2406unsigned int ecb_cold
1063ev_supported_backends (void) 2407ev_supported_backends (void) EV_THROW
1064{ 2408{
1065 unsigned int flags = 0; 2409 unsigned int flags = 0;
1066 2410
1067 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2411 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1068 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2412 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1071 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2415 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1072 2416
1073 return flags; 2417 return flags;
1074} 2418}
1075 2419
1076unsigned int 2420unsigned int ecb_cold
1077ev_recommended_backends (void) 2421ev_recommended_backends (void) EV_THROW
1078{ 2422{
1079 unsigned int flags = ev_supported_backends (); 2423 unsigned int flags = ev_supported_backends ();
1080 2424
1081#ifndef __NetBSD__ 2425#ifndef __NetBSD__
1082 /* kqueue is borked on everything but netbsd apparently */ 2426 /* kqueue is borked on everything but netbsd apparently */
1083 /* it usually doesn't work correctly on anything but sockets and pipes */ 2427 /* it usually doesn't work correctly on anything but sockets and pipes */
1084 flags &= ~EVBACKEND_KQUEUE; 2428 flags &= ~EVBACKEND_KQUEUE;
1085#endif 2429#endif
1086#ifdef __APPLE__ 2430#ifdef __APPLE__
1087 // flags &= ~EVBACKEND_KQUEUE; for documentation 2431 /* only select works correctly on that "unix-certified" platform */
1088 flags &= ~EVBACKEND_POLL; 2432 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2433 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2434#endif
2435#ifdef __FreeBSD__
2436 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1089#endif 2437#endif
1090 2438
1091 return flags; 2439 return flags;
1092} 2440}
1093 2441
2442unsigned int ecb_cold
2443ev_embeddable_backends (void) EV_THROW
2444{
2445 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2446
2447 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2448 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2449 flags &= ~EVBACKEND_EPOLL;
2450
2451 return flags;
2452}
2453
1094unsigned int 2454unsigned int
1095ev_embeddable_backends (void) 2455ev_backend (EV_P) EV_THROW
1096{ 2456{
1097 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2457 return backend;
1098
1099 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1100 /* please fix it and tell me how to detect the fix */
1101 flags &= ~EVBACKEND_EPOLL;
1102
1103 return flags;
1104} 2458}
1105 2459
2460#if EV_FEATURE_API
1106unsigned int 2461unsigned int
1107ev_backend (EV_P) 2462ev_iteration (EV_P) EV_THROW
1108{ 2463{
1109 return backend; 2464 return loop_count;
1110} 2465}
1111 2466
1112unsigned int 2467unsigned int
1113ev_loop_count (EV_P) 2468ev_depth (EV_P) EV_THROW
1114{ 2469{
1115 return loop_count; 2470 return loop_depth;
1116} 2471}
1117 2472
1118void 2473void
1119ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2474ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1120{ 2475{
1121 io_blocktime = interval; 2476 io_blocktime = interval;
1122} 2477}
1123 2478
1124void 2479void
1125ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2480ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1126{ 2481{
1127 timeout_blocktime = interval; 2482 timeout_blocktime = interval;
1128} 2483}
1129 2484
2485void
2486ev_set_userdata (EV_P_ void *data) EV_THROW
2487{
2488 userdata = data;
2489}
2490
2491void *
2492ev_userdata (EV_P) EV_THROW
2493{
2494 return userdata;
2495}
2496
2497void
2498ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2499{
2500 invoke_cb = invoke_pending_cb;
2501}
2502
2503void
2504ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2505{
2506 release_cb = release;
2507 acquire_cb = acquire;
2508}
2509#endif
2510
2511/* initialise a loop structure, must be zero-initialised */
1130static void noinline 2512static void noinline ecb_cold
1131loop_init (EV_P_ unsigned int flags) 2513loop_init (EV_P_ unsigned int flags) EV_THROW
1132{ 2514{
1133 if (!backend) 2515 if (!backend)
1134 { 2516 {
2517 origflags = flags;
2518
2519#if EV_USE_REALTIME
2520 if (!have_realtime)
2521 {
2522 struct timespec ts;
2523
2524 if (!clock_gettime (CLOCK_REALTIME, &ts))
2525 have_realtime = 1;
2526 }
2527#endif
2528
1135#if EV_USE_MONOTONIC 2529#if EV_USE_MONOTONIC
2530 if (!have_monotonic)
1136 { 2531 {
1137 struct timespec ts; 2532 struct timespec ts;
2533
1138 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2534 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1139 have_monotonic = 1; 2535 have_monotonic = 1;
1140 } 2536 }
1141#endif
1142
1143 ev_rt_now = ev_time ();
1144 mn_now = get_clock ();
1145 now_floor = mn_now;
1146 rtmn_diff = ev_rt_now - mn_now;
1147
1148 io_blocktime = 0.;
1149 timeout_blocktime = 0.;
1150 backend = 0;
1151 backend_fd = -1;
1152 gotasync = 0;
1153#if EV_USE_INOTIFY
1154 fs_fd = -2;
1155#endif 2537#endif
1156 2538
1157 /* pid check not overridable via env */ 2539 /* pid check not overridable via env */
1158#ifndef _WIN32 2540#ifndef _WIN32
1159 if (flags & EVFLAG_FORKCHECK) 2541 if (flags & EVFLAG_FORKCHECK)
… …
1163 if (!(flags & EVFLAG_NOENV) 2545 if (!(flags & EVFLAG_NOENV)
1164 && !enable_secure () 2546 && !enable_secure ()
1165 && getenv ("LIBEV_FLAGS")) 2547 && getenv ("LIBEV_FLAGS"))
1166 flags = atoi (getenv ("LIBEV_FLAGS")); 2548 flags = atoi (getenv ("LIBEV_FLAGS"));
1167 2549
1168 if (!(flags & 0x0000ffffUL)) 2550 ev_rt_now = ev_time ();
2551 mn_now = get_clock ();
2552 now_floor = mn_now;
2553 rtmn_diff = ev_rt_now - mn_now;
2554#if EV_FEATURE_API
2555 invoke_cb = ev_invoke_pending;
2556#endif
2557
2558 io_blocktime = 0.;
2559 timeout_blocktime = 0.;
2560 backend = 0;
2561 backend_fd = -1;
2562 sig_pending = 0;
2563#if EV_ASYNC_ENABLE
2564 async_pending = 0;
2565#endif
2566 pipe_write_skipped = 0;
2567 pipe_write_wanted = 0;
2568 evpipe [0] = -1;
2569 evpipe [1] = -1;
2570#if EV_USE_INOTIFY
2571 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2572#endif
2573#if EV_USE_SIGNALFD
2574 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2575#endif
2576
2577 if (!(flags & EVBACKEND_MASK))
1169 flags |= ev_recommended_backends (); 2578 flags |= ev_recommended_backends ();
1170 2579
2580#if EV_USE_IOCP
2581 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2582#endif
1171#if EV_USE_PORT 2583#if EV_USE_PORT
1172 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2584 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1173#endif 2585#endif
1174#if EV_USE_KQUEUE 2586#if EV_USE_KQUEUE
1175 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2587 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1182#endif 2594#endif
1183#if EV_USE_SELECT 2595#if EV_USE_SELECT
1184 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2596 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1185#endif 2597#endif
1186 2598
2599 ev_prepare_init (&pending_w, pendingcb);
2600
2601#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1187 ev_init (&pipeev, pipecb); 2602 ev_init (&pipe_w, pipecb);
1188 ev_set_priority (&pipeev, EV_MAXPRI); 2603 ev_set_priority (&pipe_w, EV_MAXPRI);
2604#endif
1189 } 2605 }
1190} 2606}
1191 2607
1192static void noinline 2608/* free up a loop structure */
2609void ecb_cold
1193loop_destroy (EV_P) 2610ev_loop_destroy (EV_P)
1194{ 2611{
1195 int i; 2612 int i;
1196 2613
2614#if EV_MULTIPLICITY
2615 /* mimic free (0) */
2616 if (!EV_A)
2617 return;
2618#endif
2619
2620#if EV_CLEANUP_ENABLE
2621 /* queue cleanup watchers (and execute them) */
2622 if (expect_false (cleanupcnt))
2623 {
2624 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2625 EV_INVOKE_PENDING;
2626 }
2627#endif
2628
2629#if EV_CHILD_ENABLE
2630 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2631 {
2632 ev_ref (EV_A); /* child watcher */
2633 ev_signal_stop (EV_A_ &childev);
2634 }
2635#endif
2636
1197 if (ev_is_active (&pipeev)) 2637 if (ev_is_active (&pipe_w))
1198 { 2638 {
1199 ev_ref (EV_A); /* signal watcher */ 2639 /*ev_ref (EV_A);*/
1200 ev_io_stop (EV_A_ &pipeev); 2640 /*ev_io_stop (EV_A_ &pipe_w);*/
1201 2641
2642 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2643 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2644 }
2645
1202#if EV_USE_EVENTFD 2646#if EV_USE_SIGNALFD
1203 if (evfd >= 0) 2647 if (ev_is_active (&sigfd_w))
1204 close (evfd); 2648 close (sigfd);
1205#endif 2649#endif
1206
1207 if (evpipe [0] >= 0)
1208 {
1209 close (evpipe [0]);
1210 close (evpipe [1]);
1211 }
1212 }
1213 2650
1214#if EV_USE_INOTIFY 2651#if EV_USE_INOTIFY
1215 if (fs_fd >= 0) 2652 if (fs_fd >= 0)
1216 close (fs_fd); 2653 close (fs_fd);
1217#endif 2654#endif
1218 2655
1219 if (backend_fd >= 0) 2656 if (backend_fd >= 0)
1220 close (backend_fd); 2657 close (backend_fd);
1221 2658
2659#if EV_USE_IOCP
2660 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2661#endif
1222#if EV_USE_PORT 2662#if EV_USE_PORT
1223 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2663 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1224#endif 2664#endif
1225#if EV_USE_KQUEUE 2665#if EV_USE_KQUEUE
1226 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2666 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1241#if EV_IDLE_ENABLE 2681#if EV_IDLE_ENABLE
1242 array_free (idle, [i]); 2682 array_free (idle, [i]);
1243#endif 2683#endif
1244 } 2684 }
1245 2685
1246 ev_free (anfds); anfdmax = 0; 2686 ev_free (anfds); anfds = 0; anfdmax = 0;
1247 2687
1248 /* have to use the microsoft-never-gets-it-right macro */ 2688 /* have to use the microsoft-never-gets-it-right macro */
2689 array_free (rfeed, EMPTY);
1249 array_free (fdchange, EMPTY); 2690 array_free (fdchange, EMPTY);
1250 array_free (timer, EMPTY); 2691 array_free (timer, EMPTY);
1251#if EV_PERIODIC_ENABLE 2692#if EV_PERIODIC_ENABLE
1252 array_free (periodic, EMPTY); 2693 array_free (periodic, EMPTY);
1253#endif 2694#endif
1254#if EV_FORK_ENABLE 2695#if EV_FORK_ENABLE
1255 array_free (fork, EMPTY); 2696 array_free (fork, EMPTY);
1256#endif 2697#endif
2698#if EV_CLEANUP_ENABLE
2699 array_free (cleanup, EMPTY);
2700#endif
1257 array_free (prepare, EMPTY); 2701 array_free (prepare, EMPTY);
1258 array_free (check, EMPTY); 2702 array_free (check, EMPTY);
1259#if EV_ASYNC_ENABLE 2703#if EV_ASYNC_ENABLE
1260 array_free (async, EMPTY); 2704 array_free (async, EMPTY);
1261#endif 2705#endif
1262 2706
1263 backend = 0; 2707 backend = 0;
1264}
1265 2708
2709#if EV_MULTIPLICITY
2710 if (ev_is_default_loop (EV_A))
2711#endif
2712 ev_default_loop_ptr = 0;
2713#if EV_MULTIPLICITY
2714 else
2715 ev_free (EV_A);
2716#endif
2717}
2718
2719#if EV_USE_INOTIFY
1266void inline_size infy_fork (EV_P); 2720inline_size void infy_fork (EV_P);
2721#endif
1267 2722
1268void inline_size 2723inline_size void
1269loop_fork (EV_P) 2724loop_fork (EV_P)
1270{ 2725{
1271#if EV_USE_PORT 2726#if EV_USE_PORT
1272 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2727 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1273#endif 2728#endif
… …
1279#endif 2734#endif
1280#if EV_USE_INOTIFY 2735#if EV_USE_INOTIFY
1281 infy_fork (EV_A); 2736 infy_fork (EV_A);
1282#endif 2737#endif
1283 2738
2739#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1284 if (ev_is_active (&pipeev)) 2740 if (ev_is_active (&pipe_w))
2741 {
2742 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2743
2744 ev_ref (EV_A);
2745 ev_io_stop (EV_A_ &pipe_w);
2746
2747 if (evpipe [0] >= 0)
2748 EV_WIN32_CLOSE_FD (evpipe [0]);
2749
2750 evpipe_init (EV_A);
2751 /* iterate over everything, in case we missed something before */
2752 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1285 { 2753 }
1286 /* this "locks" the handlers against writing to the pipe */ 2754#endif
1287 /* while we modify the fd vars */ 2755
1288 gotsig = 1; 2756 postfork = 0;
2757}
2758
2759#if EV_MULTIPLICITY
2760
2761struct ev_loop * ecb_cold
2762ev_loop_new (unsigned int flags) EV_THROW
2763{
2764 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2765
2766 memset (EV_A, 0, sizeof (struct ev_loop));
2767 loop_init (EV_A_ flags);
2768
2769 if (ev_backend (EV_A))
2770 return EV_A;
2771
2772 ev_free (EV_A);
2773 return 0;
2774}
2775
2776#endif /* multiplicity */
2777
2778#if EV_VERIFY
2779static void noinline ecb_cold
2780verify_watcher (EV_P_ W w)
2781{
2782 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2783
2784 if (w->pending)
2785 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2786}
2787
2788static void noinline ecb_cold
2789verify_heap (EV_P_ ANHE *heap, int N)
2790{
2791 int i;
2792
2793 for (i = HEAP0; i < N + HEAP0; ++i)
2794 {
2795 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2796 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2797 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2798
2799 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2800 }
2801}
2802
2803static void noinline ecb_cold
2804array_verify (EV_P_ W *ws, int cnt)
2805{
2806 while (cnt--)
2807 {
2808 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2809 verify_watcher (EV_A_ ws [cnt]);
2810 }
2811}
2812#endif
2813
2814#if EV_FEATURE_API
2815void ecb_cold
2816ev_verify (EV_P) EV_THROW
2817{
2818#if EV_VERIFY
2819 int i;
2820 WL w, w2;
2821
2822 assert (activecnt >= -1);
2823
2824 assert (fdchangemax >= fdchangecnt);
2825 for (i = 0; i < fdchangecnt; ++i)
2826 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2827
2828 assert (anfdmax >= 0);
2829 for (i = 0; i < anfdmax; ++i)
2830 {
2831 int j = 0;
2832
2833 for (w = w2 = anfds [i].head; w; w = w->next)
2834 {
2835 verify_watcher (EV_A_ (W)w);
2836
2837 if (j++ & 1)
2838 {
2839 assert (("libev: io watcher list contains a loop", w != w2));
2840 w2 = w2->next;
2841 }
2842
2843 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2844 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2845 }
2846 }
2847
2848 assert (timermax >= timercnt);
2849 verify_heap (EV_A_ timers, timercnt);
2850
2851#if EV_PERIODIC_ENABLE
2852 assert (periodicmax >= periodiccnt);
2853 verify_heap (EV_A_ periodics, periodiccnt);
2854#endif
2855
2856 for (i = NUMPRI; i--; )
2857 {
2858 assert (pendingmax [i] >= pendingcnt [i]);
2859#if EV_IDLE_ENABLE
2860 assert (idleall >= 0);
2861 assert (idlemax [i] >= idlecnt [i]);
2862 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2863#endif
2864 }
2865
2866#if EV_FORK_ENABLE
2867 assert (forkmax >= forkcnt);
2868 array_verify (EV_A_ (W *)forks, forkcnt);
2869#endif
2870
2871#if EV_CLEANUP_ENABLE
2872 assert (cleanupmax >= cleanupcnt);
2873 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2874#endif
2875
1289#if EV_ASYNC_ENABLE 2876#if EV_ASYNC_ENABLE
1290 gotasync = 1; 2877 assert (asyncmax >= asynccnt);
2878 array_verify (EV_A_ (W *)asyncs, asynccnt);
2879#endif
2880
2881#if EV_PREPARE_ENABLE
2882 assert (preparemax >= preparecnt);
2883 array_verify (EV_A_ (W *)prepares, preparecnt);
2884#endif
2885
2886#if EV_CHECK_ENABLE
2887 assert (checkmax >= checkcnt);
2888 array_verify (EV_A_ (W *)checks, checkcnt);
2889#endif
2890
2891# if 0
2892#if EV_CHILD_ENABLE
2893 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2894 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2895#endif
1291#endif 2896# endif
1292
1293 ev_ref (EV_A);
1294 ev_io_stop (EV_A_ &pipeev);
1295
1296#if EV_USE_EVENTFD
1297 if (evfd >= 0)
1298 close (evfd);
1299#endif 2897#endif
1300
1301 if (evpipe [0] >= 0)
1302 {
1303 close (evpipe [0]);
1304 close (evpipe [1]);
1305 }
1306
1307 evpipe_init (EV_A);
1308 /* now iterate over everything, in case we missed something */
1309 pipecb (EV_A_ &pipeev, EV_READ);
1310 }
1311
1312 postfork = 0;
1313} 2898}
2899#endif
1314 2900
1315#if EV_MULTIPLICITY 2901#if EV_MULTIPLICITY
1316struct ev_loop * 2902struct ev_loop * ecb_cold
1317ev_loop_new (unsigned int flags)
1318{
1319 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1320
1321 memset (loop, 0, sizeof (struct ev_loop));
1322
1323 loop_init (EV_A_ flags);
1324
1325 if (ev_backend (EV_A))
1326 return loop;
1327
1328 return 0;
1329}
1330
1331void
1332ev_loop_destroy (EV_P)
1333{
1334 loop_destroy (EV_A);
1335 ev_free (loop);
1336}
1337
1338void
1339ev_loop_fork (EV_P)
1340{
1341 postfork = 1; /* must be in line with ev_default_fork */
1342}
1343
1344#endif
1345
1346#if EV_MULTIPLICITY
1347struct ev_loop *
1348ev_default_loop_init (unsigned int flags)
1349#else 2903#else
1350int 2904int
2905#endif
1351ev_default_loop (unsigned int flags) 2906ev_default_loop (unsigned int flags) EV_THROW
1352#endif
1353{ 2907{
1354 if (!ev_default_loop_ptr) 2908 if (!ev_default_loop_ptr)
1355 { 2909 {
1356#if EV_MULTIPLICITY 2910#if EV_MULTIPLICITY
1357 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2911 EV_P = ev_default_loop_ptr = &default_loop_struct;
1358#else 2912#else
1359 ev_default_loop_ptr = 1; 2913 ev_default_loop_ptr = 1;
1360#endif 2914#endif
1361 2915
1362 loop_init (EV_A_ flags); 2916 loop_init (EV_A_ flags);
1363 2917
1364 if (ev_backend (EV_A)) 2918 if (ev_backend (EV_A))
1365 { 2919 {
1366#ifndef _WIN32 2920#if EV_CHILD_ENABLE
1367 ev_signal_init (&childev, childcb, SIGCHLD); 2921 ev_signal_init (&childev, childcb, SIGCHLD);
1368 ev_set_priority (&childev, EV_MAXPRI); 2922 ev_set_priority (&childev, EV_MAXPRI);
1369 ev_signal_start (EV_A_ &childev); 2923 ev_signal_start (EV_A_ &childev);
1370 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2924 ev_unref (EV_A); /* child watcher should not keep loop alive */
1371#endif 2925#endif
… …
1376 2930
1377 return ev_default_loop_ptr; 2931 return ev_default_loop_ptr;
1378} 2932}
1379 2933
1380void 2934void
1381ev_default_destroy (void) 2935ev_loop_fork (EV_P) EV_THROW
1382{ 2936{
1383#if EV_MULTIPLICITY 2937 postfork = 1;
1384 struct ev_loop *loop = ev_default_loop_ptr;
1385#endif
1386
1387#ifndef _WIN32
1388 ev_ref (EV_A); /* child watcher */
1389 ev_signal_stop (EV_A_ &childev);
1390#endif
1391
1392 loop_destroy (EV_A);
1393}
1394
1395void
1396ev_default_fork (void)
1397{
1398#if EV_MULTIPLICITY
1399 struct ev_loop *loop = ev_default_loop_ptr;
1400#endif
1401
1402 if (backend)
1403 postfork = 1; /* must be in line with ev_loop_fork */
1404} 2938}
1405 2939
1406/*****************************************************************************/ 2940/*****************************************************************************/
1407 2941
1408void 2942void
1409ev_invoke (EV_P_ void *w, int revents) 2943ev_invoke (EV_P_ void *w, int revents)
1410{ 2944{
1411 EV_CB_INVOKE ((W)w, revents); 2945 EV_CB_INVOKE ((W)w, revents);
1412} 2946}
1413 2947
1414void inline_speed 2948unsigned int
1415call_pending (EV_P) 2949ev_pending_count (EV_P) EV_THROW
1416{ 2950{
1417 int pri; 2951 int pri;
2952 unsigned int count = 0;
1418 2953
1419 for (pri = NUMPRI; pri--; ) 2954 for (pri = NUMPRI; pri--; )
2955 count += pendingcnt [pri];
2956
2957 return count;
2958}
2959
2960void noinline
2961ev_invoke_pending (EV_P)
2962{
2963 pendingpri = NUMPRI;
2964
2965 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2966 {
2967 --pendingpri;
2968
1420 while (pendingcnt [pri]) 2969 while (pendingcnt [pendingpri])
1421 {
1422 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1423
1424 if (expect_true (p->w))
1425 {
1426 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1427
1428 p->w->pending = 0;
1429 EV_CB_INVOKE (p->w, p->events);
1430 }
1431 }
1432}
1433
1434void inline_size
1435timers_reify (EV_P)
1436{
1437 while (timercnt && ((WT)timers [0])->at <= mn_now)
1438 {
1439 ev_timer *w = (ev_timer *)timers [0];
1440
1441 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1442
1443 /* first reschedule or stop timer */
1444 if (w->repeat)
1445 { 2970 {
1446 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2971 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1447 2972
1448 ((WT)w)->at += w->repeat; 2973 p->w->pending = 0;
1449 if (((WT)w)->at < mn_now) 2974 EV_CB_INVOKE (p->w, p->events);
1450 ((WT)w)->at = mn_now; 2975 EV_FREQUENT_CHECK;
1451
1452 downheap (timers, timercnt, 0);
1453 } 2976 }
1454 else
1455 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1456
1457 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1458 }
1459}
1460
1461#if EV_PERIODIC_ENABLE
1462void inline_size
1463periodics_reify (EV_P)
1464{
1465 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1466 { 2977 }
1467 ev_periodic *w = (ev_periodic *)periodics [0];
1468
1469 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1470
1471 /* first reschedule or stop timer */
1472 if (w->reschedule_cb)
1473 {
1474 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1475 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1476 downheap (periodics, periodiccnt, 0);
1477 }
1478 else if (w->interval)
1479 {
1480 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1481 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1482 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1483 downheap (periodics, periodiccnt, 0);
1484 }
1485 else
1486 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1487
1488 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1489 }
1490} 2978}
1491
1492static void noinline
1493periodics_reschedule (EV_P)
1494{
1495 int i;
1496
1497 /* adjust periodics after time jump */
1498 for (i = 0; i < periodiccnt; ++i)
1499 {
1500 ev_periodic *w = (ev_periodic *)periodics [i];
1501
1502 if (w->reschedule_cb)
1503 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1504 else if (w->interval)
1505 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1506 }
1507
1508 /* now rebuild the heap */
1509 for (i = periodiccnt >> 1; i--; )
1510 downheap (periodics, periodiccnt, i);
1511}
1512#endif
1513 2979
1514#if EV_IDLE_ENABLE 2980#if EV_IDLE_ENABLE
1515void inline_size 2981/* make idle watchers pending. this handles the "call-idle */
2982/* only when higher priorities are idle" logic */
2983inline_size void
1516idle_reify (EV_P) 2984idle_reify (EV_P)
1517{ 2985{
1518 if (expect_false (idleall)) 2986 if (expect_false (idleall))
1519 { 2987 {
1520 int pri; 2988 int pri;
… …
1532 } 3000 }
1533 } 3001 }
1534} 3002}
1535#endif 3003#endif
1536 3004
1537void inline_speed 3005/* make timers pending */
3006inline_size void
3007timers_reify (EV_P)
3008{
3009 EV_FREQUENT_CHECK;
3010
3011 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3012 {
3013 do
3014 {
3015 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3016
3017 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3018
3019 /* first reschedule or stop timer */
3020 if (w->repeat)
3021 {
3022 ev_at (w) += w->repeat;
3023 if (ev_at (w) < mn_now)
3024 ev_at (w) = mn_now;
3025
3026 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3027
3028 ANHE_at_cache (timers [HEAP0]);
3029 downheap (timers, timercnt, HEAP0);
3030 }
3031 else
3032 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3033
3034 EV_FREQUENT_CHECK;
3035 feed_reverse (EV_A_ (W)w);
3036 }
3037 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3038
3039 feed_reverse_done (EV_A_ EV_TIMER);
3040 }
3041}
3042
3043#if EV_PERIODIC_ENABLE
3044
3045static void noinline
3046periodic_recalc (EV_P_ ev_periodic *w)
3047{
3048 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3049 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3050
3051 /* the above almost always errs on the low side */
3052 while (at <= ev_rt_now)
3053 {
3054 ev_tstamp nat = at + w->interval;
3055
3056 /* when resolution fails us, we use ev_rt_now */
3057 if (expect_false (nat == at))
3058 {
3059 at = ev_rt_now;
3060 break;
3061 }
3062
3063 at = nat;
3064 }
3065
3066 ev_at (w) = at;
3067}
3068
3069/* make periodics pending */
3070inline_size void
3071periodics_reify (EV_P)
3072{
3073 EV_FREQUENT_CHECK;
3074
3075 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3076 {
3077 do
3078 {
3079 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3080
3081 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3082
3083 /* first reschedule or stop timer */
3084 if (w->reschedule_cb)
3085 {
3086 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3087
3088 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3089
3090 ANHE_at_cache (periodics [HEAP0]);
3091 downheap (periodics, periodiccnt, HEAP0);
3092 }
3093 else if (w->interval)
3094 {
3095 periodic_recalc (EV_A_ w);
3096 ANHE_at_cache (periodics [HEAP0]);
3097 downheap (periodics, periodiccnt, HEAP0);
3098 }
3099 else
3100 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3101
3102 EV_FREQUENT_CHECK;
3103 feed_reverse (EV_A_ (W)w);
3104 }
3105 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3106
3107 feed_reverse_done (EV_A_ EV_PERIODIC);
3108 }
3109}
3110
3111/* simply recalculate all periodics */
3112/* TODO: maybe ensure that at least one event happens when jumping forward? */
3113static void noinline ecb_cold
3114periodics_reschedule (EV_P)
3115{
3116 int i;
3117
3118 /* adjust periodics after time jump */
3119 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3120 {
3121 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3122
3123 if (w->reschedule_cb)
3124 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3125 else if (w->interval)
3126 periodic_recalc (EV_A_ w);
3127
3128 ANHE_at_cache (periodics [i]);
3129 }
3130
3131 reheap (periodics, periodiccnt);
3132}
3133#endif
3134
3135/* adjust all timers by a given offset */
3136static void noinline ecb_cold
3137timers_reschedule (EV_P_ ev_tstamp adjust)
3138{
3139 int i;
3140
3141 for (i = 0; i < timercnt; ++i)
3142 {
3143 ANHE *he = timers + i + HEAP0;
3144 ANHE_w (*he)->at += adjust;
3145 ANHE_at_cache (*he);
3146 }
3147}
3148
3149/* fetch new monotonic and realtime times from the kernel */
3150/* also detect if there was a timejump, and act accordingly */
3151inline_speed void
1538time_update (EV_P_ ev_tstamp max_block) 3152time_update (EV_P_ ev_tstamp max_block)
1539{ 3153{
1540 int i;
1541
1542#if EV_USE_MONOTONIC 3154#if EV_USE_MONOTONIC
1543 if (expect_true (have_monotonic)) 3155 if (expect_true (have_monotonic))
1544 { 3156 {
3157 int i;
1545 ev_tstamp odiff = rtmn_diff; 3158 ev_tstamp odiff = rtmn_diff;
1546 3159
1547 mn_now = get_clock (); 3160 mn_now = get_clock ();
1548 3161
1549 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3162 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1565 * doesn't hurt either as we only do this on time-jumps or 3178 * doesn't hurt either as we only do this on time-jumps or
1566 * in the unlikely event of having been preempted here. 3179 * in the unlikely event of having been preempted here.
1567 */ 3180 */
1568 for (i = 4; --i; ) 3181 for (i = 4; --i; )
1569 { 3182 {
3183 ev_tstamp diff;
1570 rtmn_diff = ev_rt_now - mn_now; 3184 rtmn_diff = ev_rt_now - mn_now;
1571 3185
1572 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3186 diff = odiff - rtmn_diff;
3187
3188 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1573 return; /* all is well */ 3189 return; /* all is well */
1574 3190
1575 ev_rt_now = ev_time (); 3191 ev_rt_now = ev_time ();
1576 mn_now = get_clock (); 3192 mn_now = get_clock ();
1577 now_floor = mn_now; 3193 now_floor = mn_now;
1578 } 3194 }
1579 3195
3196 /* no timer adjustment, as the monotonic clock doesn't jump */
3197 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1580# if EV_PERIODIC_ENABLE 3198# if EV_PERIODIC_ENABLE
1581 periodics_reschedule (EV_A); 3199 periodics_reschedule (EV_A);
1582# endif 3200# endif
1583 /* no timer adjustment, as the monotonic clock doesn't jump */
1584 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1585 } 3201 }
1586 else 3202 else
1587#endif 3203#endif
1588 { 3204 {
1589 ev_rt_now = ev_time (); 3205 ev_rt_now = ev_time ();
1590 3206
1591 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3207 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1592 { 3208 {
3209 /* adjust timers. this is easy, as the offset is the same for all of them */
3210 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1593#if EV_PERIODIC_ENABLE 3211#if EV_PERIODIC_ENABLE
1594 periodics_reschedule (EV_A); 3212 periodics_reschedule (EV_A);
1595#endif 3213#endif
1596 /* adjust timers. this is easy, as the offset is the same for all of them */
1597 for (i = 0; i < timercnt; ++i)
1598 ((WT)timers [i])->at += ev_rt_now - mn_now;
1599 } 3214 }
1600 3215
1601 mn_now = ev_rt_now; 3216 mn_now = ev_rt_now;
1602 } 3217 }
1603} 3218}
1604 3219
1605void 3220int
1606ev_ref (EV_P)
1607{
1608 ++activecnt;
1609}
1610
1611void
1612ev_unref (EV_P)
1613{
1614 --activecnt;
1615}
1616
1617static int loop_done;
1618
1619void
1620ev_loop (EV_P_ int flags) 3221ev_run (EV_P_ int flags)
1621{ 3222{
3223#if EV_FEATURE_API
3224 ++loop_depth;
3225#endif
3226
3227 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3228
1622 loop_done = EVUNLOOP_CANCEL; 3229 loop_done = EVBREAK_CANCEL;
1623 3230
1624 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3231 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1625 3232
1626 do 3233 do
1627 { 3234 {
3235#if EV_VERIFY >= 2
3236 ev_verify (EV_A);
3237#endif
3238
1628#ifndef _WIN32 3239#ifndef _WIN32
1629 if (expect_false (curpid)) /* penalise the forking check even more */ 3240 if (expect_false (curpid)) /* penalise the forking check even more */
1630 if (expect_false (getpid () != curpid)) 3241 if (expect_false (getpid () != curpid))
1631 { 3242 {
1632 curpid = getpid (); 3243 curpid = getpid ();
… …
1638 /* we might have forked, so queue fork handlers */ 3249 /* we might have forked, so queue fork handlers */
1639 if (expect_false (postfork)) 3250 if (expect_false (postfork))
1640 if (forkcnt) 3251 if (forkcnt)
1641 { 3252 {
1642 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3253 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1643 call_pending (EV_A); 3254 EV_INVOKE_PENDING;
1644 } 3255 }
1645#endif 3256#endif
1646 3257
3258#if EV_PREPARE_ENABLE
1647 /* queue prepare watchers (and execute them) */ 3259 /* queue prepare watchers (and execute them) */
1648 if (expect_false (preparecnt)) 3260 if (expect_false (preparecnt))
1649 { 3261 {
1650 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3262 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1651 call_pending (EV_A); 3263 EV_INVOKE_PENDING;
1652 } 3264 }
3265#endif
1653 3266
1654 if (expect_false (!activecnt)) 3267 if (expect_false (loop_done))
1655 break; 3268 break;
1656 3269
1657 /* we might have forked, so reify kernel state if necessary */ 3270 /* we might have forked, so reify kernel state if necessary */
1658 if (expect_false (postfork)) 3271 if (expect_false (postfork))
1659 loop_fork (EV_A); 3272 loop_fork (EV_A);
… …
1664 /* calculate blocking time */ 3277 /* calculate blocking time */
1665 { 3278 {
1666 ev_tstamp waittime = 0.; 3279 ev_tstamp waittime = 0.;
1667 ev_tstamp sleeptime = 0.; 3280 ev_tstamp sleeptime = 0.;
1668 3281
3282 /* remember old timestamp for io_blocktime calculation */
3283 ev_tstamp prev_mn_now = mn_now;
3284
3285 /* update time to cancel out callback processing overhead */
3286 time_update (EV_A_ 1e100);
3287
3288 /* from now on, we want a pipe-wake-up */
3289 pipe_write_wanted = 1;
3290
3291 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3292
1669 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3293 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1670 { 3294 {
1671 /* update time to cancel out callback processing overhead */
1672 time_update (EV_A_ 1e100);
1673
1674 waittime = MAX_BLOCKTIME; 3295 waittime = MAX_BLOCKTIME;
1675 3296
1676 if (timercnt) 3297 if (timercnt)
1677 { 3298 {
1678 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3299 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1679 if (waittime > to) waittime = to; 3300 if (waittime > to) waittime = to;
1680 } 3301 }
1681 3302
1682#if EV_PERIODIC_ENABLE 3303#if EV_PERIODIC_ENABLE
1683 if (periodiccnt) 3304 if (periodiccnt)
1684 { 3305 {
1685 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3306 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1686 if (waittime > to) waittime = to; 3307 if (waittime > to) waittime = to;
1687 } 3308 }
1688#endif 3309#endif
1689 3310
3311 /* don't let timeouts decrease the waittime below timeout_blocktime */
1690 if (expect_false (waittime < timeout_blocktime)) 3312 if (expect_false (waittime < timeout_blocktime))
1691 waittime = timeout_blocktime; 3313 waittime = timeout_blocktime;
1692 3314
1693 sleeptime = waittime - backend_fudge; 3315 /* at this point, we NEED to wait, so we have to ensure */
3316 /* to pass a minimum nonzero value to the backend */
3317 if (expect_false (waittime < backend_mintime))
3318 waittime = backend_mintime;
1694 3319
3320 /* extra check because io_blocktime is commonly 0 */
1695 if (expect_true (sleeptime > io_blocktime)) 3321 if (expect_false (io_blocktime))
1696 sleeptime = io_blocktime;
1697
1698 if (sleeptime)
1699 { 3322 {
3323 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3324
3325 if (sleeptime > waittime - backend_mintime)
3326 sleeptime = waittime - backend_mintime;
3327
3328 if (expect_true (sleeptime > 0.))
3329 {
1700 ev_sleep (sleeptime); 3330 ev_sleep (sleeptime);
1701 waittime -= sleeptime; 3331 waittime -= sleeptime;
3332 }
1702 } 3333 }
1703 } 3334 }
1704 3335
3336#if EV_FEATURE_API
1705 ++loop_count; 3337 ++loop_count;
3338#endif
3339 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1706 backend_poll (EV_A_ waittime); 3340 backend_poll (EV_A_ waittime);
3341 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3342
3343 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3344
3345 ECB_MEMORY_FENCE_ACQUIRE;
3346 if (pipe_write_skipped)
3347 {
3348 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3349 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3350 }
3351
1707 3352
1708 /* update ev_rt_now, do magic */ 3353 /* update ev_rt_now, do magic */
1709 time_update (EV_A_ waittime + sleeptime); 3354 time_update (EV_A_ waittime + sleeptime);
1710 } 3355 }
1711 3356
… …
1718#if EV_IDLE_ENABLE 3363#if EV_IDLE_ENABLE
1719 /* queue idle watchers unless other events are pending */ 3364 /* queue idle watchers unless other events are pending */
1720 idle_reify (EV_A); 3365 idle_reify (EV_A);
1721#endif 3366#endif
1722 3367
3368#if EV_CHECK_ENABLE
1723 /* queue check watchers, to be executed first */ 3369 /* queue check watchers, to be executed first */
1724 if (expect_false (checkcnt)) 3370 if (expect_false (checkcnt))
1725 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3371 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3372#endif
1726 3373
1727 call_pending (EV_A); 3374 EV_INVOKE_PENDING;
1728 } 3375 }
1729 while (expect_true ( 3376 while (expect_true (
1730 activecnt 3377 activecnt
1731 && !loop_done 3378 && !loop_done
1732 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3379 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1733 )); 3380 ));
1734 3381
1735 if (loop_done == EVUNLOOP_ONE) 3382 if (loop_done == EVBREAK_ONE)
1736 loop_done = EVUNLOOP_CANCEL; 3383 loop_done = EVBREAK_CANCEL;
3384
3385#if EV_FEATURE_API
3386 --loop_depth;
3387#endif
3388
3389 return activecnt;
1737} 3390}
1738 3391
1739void 3392void
1740ev_unloop (EV_P_ int how) 3393ev_break (EV_P_ int how) EV_THROW
1741{ 3394{
1742 loop_done = how; 3395 loop_done = how;
1743} 3396}
1744 3397
3398void
3399ev_ref (EV_P) EV_THROW
3400{
3401 ++activecnt;
3402}
3403
3404void
3405ev_unref (EV_P) EV_THROW
3406{
3407 --activecnt;
3408}
3409
3410void
3411ev_now_update (EV_P) EV_THROW
3412{
3413 time_update (EV_A_ 1e100);
3414}
3415
3416void
3417ev_suspend (EV_P) EV_THROW
3418{
3419 ev_now_update (EV_A);
3420}
3421
3422void
3423ev_resume (EV_P) EV_THROW
3424{
3425 ev_tstamp mn_prev = mn_now;
3426
3427 ev_now_update (EV_A);
3428 timers_reschedule (EV_A_ mn_now - mn_prev);
3429#if EV_PERIODIC_ENABLE
3430 /* TODO: really do this? */
3431 periodics_reschedule (EV_A);
3432#endif
3433}
3434
1745/*****************************************************************************/ 3435/*****************************************************************************/
3436/* singly-linked list management, used when the expected list length is short */
1746 3437
1747void inline_size 3438inline_size void
1748wlist_add (WL *head, WL elem) 3439wlist_add (WL *head, WL elem)
1749{ 3440{
1750 elem->next = *head; 3441 elem->next = *head;
1751 *head = elem; 3442 *head = elem;
1752} 3443}
1753 3444
1754void inline_size 3445inline_size void
1755wlist_del (WL *head, WL elem) 3446wlist_del (WL *head, WL elem)
1756{ 3447{
1757 while (*head) 3448 while (*head)
1758 { 3449 {
1759 if (*head == elem) 3450 if (expect_true (*head == elem))
1760 { 3451 {
1761 *head = elem->next; 3452 *head = elem->next;
1762 return; 3453 break;
1763 } 3454 }
1764 3455
1765 head = &(*head)->next; 3456 head = &(*head)->next;
1766 } 3457 }
1767} 3458}
1768 3459
1769void inline_speed 3460/* internal, faster, version of ev_clear_pending */
3461inline_speed void
1770clear_pending (EV_P_ W w) 3462clear_pending (EV_P_ W w)
1771{ 3463{
1772 if (w->pending) 3464 if (w->pending)
1773 { 3465 {
1774 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3466 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1775 w->pending = 0; 3467 w->pending = 0;
1776 } 3468 }
1777} 3469}
1778 3470
1779int 3471int
1780ev_clear_pending (EV_P_ void *w) 3472ev_clear_pending (EV_P_ void *w) EV_THROW
1781{ 3473{
1782 W w_ = (W)w; 3474 W w_ = (W)w;
1783 int pending = w_->pending; 3475 int pending = w_->pending;
1784 3476
1785 if (expect_true (pending)) 3477 if (expect_true (pending))
1786 { 3478 {
1787 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3479 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3480 p->w = (W)&pending_w;
1788 w_->pending = 0; 3481 w_->pending = 0;
1789 p->w = 0;
1790 return p->events; 3482 return p->events;
1791 } 3483 }
1792 else 3484 else
1793 return 0; 3485 return 0;
1794} 3486}
1795 3487
1796void inline_size 3488inline_size void
1797pri_adjust (EV_P_ W w) 3489pri_adjust (EV_P_ W w)
1798{ 3490{
1799 int pri = w->priority; 3491 int pri = ev_priority (w);
1800 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3492 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1801 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3493 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1802 w->priority = pri; 3494 ev_set_priority (w, pri);
1803} 3495}
1804 3496
1805void inline_speed 3497inline_speed void
1806ev_start (EV_P_ W w, int active) 3498ev_start (EV_P_ W w, int active)
1807{ 3499{
1808 pri_adjust (EV_A_ w); 3500 pri_adjust (EV_A_ w);
1809 w->active = active; 3501 w->active = active;
1810 ev_ref (EV_A); 3502 ev_ref (EV_A);
1811} 3503}
1812 3504
1813void inline_size 3505inline_size void
1814ev_stop (EV_P_ W w) 3506ev_stop (EV_P_ W w)
1815{ 3507{
1816 ev_unref (EV_A); 3508 ev_unref (EV_A);
1817 w->active = 0; 3509 w->active = 0;
1818} 3510}
1819 3511
1820/*****************************************************************************/ 3512/*****************************************************************************/
1821 3513
1822void noinline 3514void noinline
1823ev_io_start (EV_P_ ev_io *w) 3515ev_io_start (EV_P_ ev_io *w) EV_THROW
1824{ 3516{
1825 int fd = w->fd; 3517 int fd = w->fd;
1826 3518
1827 if (expect_false (ev_is_active (w))) 3519 if (expect_false (ev_is_active (w)))
1828 return; 3520 return;
1829 3521
1830 assert (("ev_io_start called with negative fd", fd >= 0)); 3522 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3523 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3524
3525 EV_FREQUENT_CHECK;
1831 3526
1832 ev_start (EV_A_ (W)w, 1); 3527 ev_start (EV_A_ (W)w, 1);
1833 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3528 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1834 wlist_add (&anfds[fd].head, (WL)w); 3529 wlist_add (&anfds[fd].head, (WL)w);
1835 3530
3531 /* common bug, apparently */
3532 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3533
1836 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3534 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1837 w->events &= ~EV_IOFDSET; 3535 w->events &= ~EV__IOFDSET;
3536
3537 EV_FREQUENT_CHECK;
1838} 3538}
1839 3539
1840void noinline 3540void noinline
1841ev_io_stop (EV_P_ ev_io *w) 3541ev_io_stop (EV_P_ ev_io *w) EV_THROW
1842{ 3542{
1843 clear_pending (EV_A_ (W)w); 3543 clear_pending (EV_A_ (W)w);
1844 if (expect_false (!ev_is_active (w))) 3544 if (expect_false (!ev_is_active (w)))
1845 return; 3545 return;
1846 3546
1847 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3547 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3548
3549 EV_FREQUENT_CHECK;
1848 3550
1849 wlist_del (&anfds[w->fd].head, (WL)w); 3551 wlist_del (&anfds[w->fd].head, (WL)w);
1850 ev_stop (EV_A_ (W)w); 3552 ev_stop (EV_A_ (W)w);
1851 3553
1852 fd_change (EV_A_ w->fd, 1); 3554 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3555
3556 EV_FREQUENT_CHECK;
1853} 3557}
1854 3558
1855void noinline 3559void noinline
1856ev_timer_start (EV_P_ ev_timer *w) 3560ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1857{ 3561{
1858 if (expect_false (ev_is_active (w))) 3562 if (expect_false (ev_is_active (w)))
1859 return; 3563 return;
1860 3564
1861 ((WT)w)->at += mn_now; 3565 ev_at (w) += mn_now;
1862 3566
1863 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3567 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1864 3568
3569 EV_FREQUENT_CHECK;
3570
3571 ++timercnt;
1865 ev_start (EV_A_ (W)w, ++timercnt); 3572 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1866 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3573 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1867 timers [timercnt - 1] = (WT)w; 3574 ANHE_w (timers [ev_active (w)]) = (WT)w;
1868 upheap (timers, timercnt - 1); 3575 ANHE_at_cache (timers [ev_active (w)]);
3576 upheap (timers, ev_active (w));
1869 3577
3578 EV_FREQUENT_CHECK;
3579
1870 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3580 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1871} 3581}
1872 3582
1873void noinline 3583void noinline
1874ev_timer_stop (EV_P_ ev_timer *w) 3584ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1875{ 3585{
1876 clear_pending (EV_A_ (W)w); 3586 clear_pending (EV_A_ (W)w);
1877 if (expect_false (!ev_is_active (w))) 3587 if (expect_false (!ev_is_active (w)))
1878 return; 3588 return;
1879 3589
1880 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3590 EV_FREQUENT_CHECK;
1881 3591
1882 { 3592 {
1883 int active = ((W)w)->active; 3593 int active = ev_active (w);
1884 3594
3595 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3596
3597 --timercnt;
3598
1885 if (expect_true (--active < --timercnt)) 3599 if (expect_true (active < timercnt + HEAP0))
1886 { 3600 {
1887 timers [active] = timers [timercnt]; 3601 timers [active] = timers [timercnt + HEAP0];
1888 adjustheap (timers, timercnt, active); 3602 adjustheap (timers, timercnt, active);
1889 } 3603 }
1890 } 3604 }
1891 3605
1892 ((WT)w)->at -= mn_now; 3606 ev_at (w) -= mn_now;
1893 3607
1894 ev_stop (EV_A_ (W)w); 3608 ev_stop (EV_A_ (W)w);
3609
3610 EV_FREQUENT_CHECK;
1895} 3611}
1896 3612
1897void noinline 3613void noinline
1898ev_timer_again (EV_P_ ev_timer *w) 3614ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1899{ 3615{
3616 EV_FREQUENT_CHECK;
3617
3618 clear_pending (EV_A_ (W)w);
3619
1900 if (ev_is_active (w)) 3620 if (ev_is_active (w))
1901 { 3621 {
1902 if (w->repeat) 3622 if (w->repeat)
1903 { 3623 {
1904 ((WT)w)->at = mn_now + w->repeat; 3624 ev_at (w) = mn_now + w->repeat;
3625 ANHE_at_cache (timers [ev_active (w)]);
1905 adjustheap (timers, timercnt, ((W)w)->active - 1); 3626 adjustheap (timers, timercnt, ev_active (w));
1906 } 3627 }
1907 else 3628 else
1908 ev_timer_stop (EV_A_ w); 3629 ev_timer_stop (EV_A_ w);
1909 } 3630 }
1910 else if (w->repeat) 3631 else if (w->repeat)
1911 { 3632 {
1912 w->at = w->repeat; 3633 ev_at (w) = w->repeat;
1913 ev_timer_start (EV_A_ w); 3634 ev_timer_start (EV_A_ w);
1914 } 3635 }
3636
3637 EV_FREQUENT_CHECK;
3638}
3639
3640ev_tstamp
3641ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3642{
3643 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1915} 3644}
1916 3645
1917#if EV_PERIODIC_ENABLE 3646#if EV_PERIODIC_ENABLE
1918void noinline 3647void noinline
1919ev_periodic_start (EV_P_ ev_periodic *w) 3648ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1920{ 3649{
1921 if (expect_false (ev_is_active (w))) 3650 if (expect_false (ev_is_active (w)))
1922 return; 3651 return;
1923 3652
1924 if (w->reschedule_cb) 3653 if (w->reschedule_cb)
1925 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3654 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1926 else if (w->interval) 3655 else if (w->interval)
1927 { 3656 {
1928 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3657 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1929 /* this formula differs from the one in periodic_reify because we do not always round up */ 3658 periodic_recalc (EV_A_ w);
1930 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1931 } 3659 }
1932 else 3660 else
1933 ((WT)w)->at = w->offset; 3661 ev_at (w) = w->offset;
1934 3662
3663 EV_FREQUENT_CHECK;
3664
3665 ++periodiccnt;
1935 ev_start (EV_A_ (W)w, ++periodiccnt); 3666 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1936 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 3667 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1937 periodics [periodiccnt - 1] = (WT)w; 3668 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1938 upheap (periodics, periodiccnt - 1); 3669 ANHE_at_cache (periodics [ev_active (w)]);
3670 upheap (periodics, ev_active (w));
1939 3671
3672 EV_FREQUENT_CHECK;
3673
1940 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 3674 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1941} 3675}
1942 3676
1943void noinline 3677void noinline
1944ev_periodic_stop (EV_P_ ev_periodic *w) 3678ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1945{ 3679{
1946 clear_pending (EV_A_ (W)w); 3680 clear_pending (EV_A_ (W)w);
1947 if (expect_false (!ev_is_active (w))) 3681 if (expect_false (!ev_is_active (w)))
1948 return; 3682 return;
1949 3683
1950 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 3684 EV_FREQUENT_CHECK;
1951 3685
1952 { 3686 {
1953 int active = ((W)w)->active; 3687 int active = ev_active (w);
1954 3688
3689 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3690
3691 --periodiccnt;
3692
1955 if (expect_true (--active < --periodiccnt)) 3693 if (expect_true (active < periodiccnt + HEAP0))
1956 { 3694 {
1957 periodics [active] = periodics [periodiccnt]; 3695 periodics [active] = periodics [periodiccnt + HEAP0];
1958 adjustheap (periodics, periodiccnt, active); 3696 adjustheap (periodics, periodiccnt, active);
1959 } 3697 }
1960 } 3698 }
1961 3699
1962 ev_stop (EV_A_ (W)w); 3700 ev_stop (EV_A_ (W)w);
3701
3702 EV_FREQUENT_CHECK;
1963} 3703}
1964 3704
1965void noinline 3705void noinline
1966ev_periodic_again (EV_P_ ev_periodic *w) 3706ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1967{ 3707{
1968 /* TODO: use adjustheap and recalculation */ 3708 /* TODO: use adjustheap and recalculation */
1969 ev_periodic_stop (EV_A_ w); 3709 ev_periodic_stop (EV_A_ w);
1970 ev_periodic_start (EV_A_ w); 3710 ev_periodic_start (EV_A_ w);
1971} 3711}
… …
1973 3713
1974#ifndef SA_RESTART 3714#ifndef SA_RESTART
1975# define SA_RESTART 0 3715# define SA_RESTART 0
1976#endif 3716#endif
1977 3717
3718#if EV_SIGNAL_ENABLE
3719
1978void noinline 3720void noinline
1979ev_signal_start (EV_P_ ev_signal *w) 3721ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1980{ 3722{
1981#if EV_MULTIPLICITY
1982 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1983#endif
1984 if (expect_false (ev_is_active (w))) 3723 if (expect_false (ev_is_active (w)))
1985 return; 3724 return;
1986 3725
1987 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3726 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1988 3727
1989 evpipe_init (EV_A); 3728#if EV_MULTIPLICITY
3729 assert (("libev: a signal must not be attached to two different loops",
3730 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
1990 3731
3732 signals [w->signum - 1].loop = EV_A;
3733 ECB_MEMORY_FENCE_RELEASE;
3734#endif
3735
3736 EV_FREQUENT_CHECK;
3737
3738#if EV_USE_SIGNALFD
3739 if (sigfd == -2)
1991 { 3740 {
1992#ifndef _WIN32 3741 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1993 sigset_t full, prev; 3742 if (sigfd < 0 && errno == EINVAL)
1994 sigfillset (&full); 3743 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1995 sigprocmask (SIG_SETMASK, &full, &prev);
1996#endif
1997 3744
1998 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3745 if (sigfd >= 0)
3746 {
3747 fd_intern (sigfd); /* doing it twice will not hurt */
1999 3748
2000#ifndef _WIN32 3749 sigemptyset (&sigfd_set);
2001 sigprocmask (SIG_SETMASK, &prev, 0); 3750
2002#endif 3751 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3752 ev_set_priority (&sigfd_w, EV_MAXPRI);
3753 ev_io_start (EV_A_ &sigfd_w);
3754 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3755 }
2003 } 3756 }
3757
3758 if (sigfd >= 0)
3759 {
3760 /* TODO: check .head */
3761 sigaddset (&sigfd_set, w->signum);
3762 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3763
3764 signalfd (sigfd, &sigfd_set, 0);
3765 }
3766#endif
2004 3767
2005 ev_start (EV_A_ (W)w, 1); 3768 ev_start (EV_A_ (W)w, 1);
2006 wlist_add (&signals [w->signum - 1].head, (WL)w); 3769 wlist_add (&signals [w->signum - 1].head, (WL)w);
2007 3770
2008 if (!((WL)w)->next) 3771 if (!((WL)w)->next)
3772# if EV_USE_SIGNALFD
3773 if (sigfd < 0) /*TODO*/
3774# endif
2009 { 3775 {
2010#if _WIN32 3776# ifdef _WIN32
3777 evpipe_init (EV_A);
3778
2011 signal (w->signum, ev_sighandler); 3779 signal (w->signum, ev_sighandler);
2012#else 3780# else
2013 struct sigaction sa; 3781 struct sigaction sa;
3782
3783 evpipe_init (EV_A);
3784
2014 sa.sa_handler = ev_sighandler; 3785 sa.sa_handler = ev_sighandler;
2015 sigfillset (&sa.sa_mask); 3786 sigfillset (&sa.sa_mask);
2016 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3787 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2017 sigaction (w->signum, &sa, 0); 3788 sigaction (w->signum, &sa, 0);
3789
3790 if (origflags & EVFLAG_NOSIGMASK)
3791 {
3792 sigemptyset (&sa.sa_mask);
3793 sigaddset (&sa.sa_mask, w->signum);
3794 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3795 }
2018#endif 3796#endif
2019 } 3797 }
3798
3799 EV_FREQUENT_CHECK;
2020} 3800}
2021 3801
2022void noinline 3802void noinline
2023ev_signal_stop (EV_P_ ev_signal *w) 3803ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2024{ 3804{
2025 clear_pending (EV_A_ (W)w); 3805 clear_pending (EV_A_ (W)w);
2026 if (expect_false (!ev_is_active (w))) 3806 if (expect_false (!ev_is_active (w)))
2027 return; 3807 return;
2028 3808
3809 EV_FREQUENT_CHECK;
3810
2029 wlist_del (&signals [w->signum - 1].head, (WL)w); 3811 wlist_del (&signals [w->signum - 1].head, (WL)w);
2030 ev_stop (EV_A_ (W)w); 3812 ev_stop (EV_A_ (W)w);
2031 3813
2032 if (!signals [w->signum - 1].head) 3814 if (!signals [w->signum - 1].head)
3815 {
3816#if EV_MULTIPLICITY
3817 signals [w->signum - 1].loop = 0; /* unattach from signal */
3818#endif
3819#if EV_USE_SIGNALFD
3820 if (sigfd >= 0)
3821 {
3822 sigset_t ss;
3823
3824 sigemptyset (&ss);
3825 sigaddset (&ss, w->signum);
3826 sigdelset (&sigfd_set, w->signum);
3827
3828 signalfd (sigfd, &sigfd_set, 0);
3829 sigprocmask (SIG_UNBLOCK, &ss, 0);
3830 }
3831 else
3832#endif
2033 signal (w->signum, SIG_DFL); 3833 signal (w->signum, SIG_DFL);
3834 }
3835
3836 EV_FREQUENT_CHECK;
2034} 3837}
3838
3839#endif
3840
3841#if EV_CHILD_ENABLE
2035 3842
2036void 3843void
2037ev_child_start (EV_P_ ev_child *w) 3844ev_child_start (EV_P_ ev_child *w) EV_THROW
2038{ 3845{
2039#if EV_MULTIPLICITY 3846#if EV_MULTIPLICITY
2040 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3847 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2041#endif 3848#endif
2042 if (expect_false (ev_is_active (w))) 3849 if (expect_false (ev_is_active (w)))
2043 return; 3850 return;
2044 3851
3852 EV_FREQUENT_CHECK;
3853
2045 ev_start (EV_A_ (W)w, 1); 3854 ev_start (EV_A_ (W)w, 1);
2046 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3855 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3856
3857 EV_FREQUENT_CHECK;
2047} 3858}
2048 3859
2049void 3860void
2050ev_child_stop (EV_P_ ev_child *w) 3861ev_child_stop (EV_P_ ev_child *w) EV_THROW
2051{ 3862{
2052 clear_pending (EV_A_ (W)w); 3863 clear_pending (EV_A_ (W)w);
2053 if (expect_false (!ev_is_active (w))) 3864 if (expect_false (!ev_is_active (w)))
2054 return; 3865 return;
2055 3866
3867 EV_FREQUENT_CHECK;
3868
2056 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3869 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2057 ev_stop (EV_A_ (W)w); 3870 ev_stop (EV_A_ (W)w);
3871
3872 EV_FREQUENT_CHECK;
2058} 3873}
3874
3875#endif
2059 3876
2060#if EV_STAT_ENABLE 3877#if EV_STAT_ENABLE
2061 3878
2062# ifdef _WIN32 3879# ifdef _WIN32
2063# undef lstat 3880# undef lstat
2064# define lstat(a,b) _stati64 (a,b) 3881# define lstat(a,b) _stati64 (a,b)
2065# endif 3882# endif
2066 3883
2067#define DEF_STAT_INTERVAL 5.0074891 3884#define DEF_STAT_INTERVAL 5.0074891
3885#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2068#define MIN_STAT_INTERVAL 0.1074891 3886#define MIN_STAT_INTERVAL 0.1074891
2069 3887
2070static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3888static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2071 3889
2072#if EV_USE_INOTIFY 3890#if EV_USE_INOTIFY
2073# define EV_INOTIFY_BUFSIZE 8192 3891
3892/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3893# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2074 3894
2075static void noinline 3895static void noinline
2076infy_add (EV_P_ ev_stat *w) 3896infy_add (EV_P_ ev_stat *w)
2077{ 3897{
2078 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); 3898 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);
2079 3899
2080 if (w->wd < 0) 3900 if (w->wd >= 0)
3901 {
3902 struct statfs sfs;
3903
3904 /* now local changes will be tracked by inotify, but remote changes won't */
3905 /* unless the filesystem is known to be local, we therefore still poll */
3906 /* also do poll on <2.6.25, but with normal frequency */
3907
3908 if (!fs_2625)
3909 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3910 else if (!statfs (w->path, &sfs)
3911 && (sfs.f_type == 0x1373 /* devfs */
3912 || sfs.f_type == 0xEF53 /* ext2/3 */
3913 || sfs.f_type == 0x3153464a /* jfs */
3914 || sfs.f_type == 0x52654973 /* reiser3 */
3915 || sfs.f_type == 0x01021994 /* tempfs */
3916 || sfs.f_type == 0x58465342 /* xfs */))
3917 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3918 else
3919 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2081 { 3920 }
2082 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3921 else
3922 {
3923 /* can't use inotify, continue to stat */
3924 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2083 3925
2084 /* monitor some parent directory for speedup hints */ 3926 /* if path is not there, monitor some parent directory for speedup hints */
3927 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3928 /* but an efficiency issue only */
2085 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3929 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2086 { 3930 {
2087 char path [4096]; 3931 char path [4096];
2088 strcpy (path, w->path); 3932 strcpy (path, w->path);
2089 3933
… …
2092 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3936 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2093 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3937 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2094 3938
2095 char *pend = strrchr (path, '/'); 3939 char *pend = strrchr (path, '/');
2096 3940
2097 if (!pend) 3941 if (!pend || pend == path)
2098 break; /* whoops, no '/', complain to your admin */ 3942 break;
2099 3943
2100 *pend = 0; 3944 *pend = 0;
2101 w->wd = inotify_add_watch (fs_fd, path, mask); 3945 w->wd = inotify_add_watch (fs_fd, path, mask);
2102 } 3946 }
2103 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3947 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2104 } 3948 }
2105 } 3949 }
2106 else
2107 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2108 3950
2109 if (w->wd >= 0) 3951 if (w->wd >= 0)
2110 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3952 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3953
3954 /* now re-arm timer, if required */
3955 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3956 ev_timer_again (EV_A_ &w->timer);
3957 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2111} 3958}
2112 3959
2113static void noinline 3960static void noinline
2114infy_del (EV_P_ ev_stat *w) 3961infy_del (EV_P_ ev_stat *w)
2115{ 3962{
… …
2118 3965
2119 if (wd < 0) 3966 if (wd < 0)
2120 return; 3967 return;
2121 3968
2122 w->wd = -2; 3969 w->wd = -2;
2123 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3970 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2124 wlist_del (&fs_hash [slot].head, (WL)w); 3971 wlist_del (&fs_hash [slot].head, (WL)w);
2125 3972
2126 /* remove this watcher, if others are watching it, they will rearm */ 3973 /* remove this watcher, if others are watching it, they will rearm */
2127 inotify_rm_watch (fs_fd, wd); 3974 inotify_rm_watch (fs_fd, wd);
2128} 3975}
2129 3976
2130static void noinline 3977static void noinline
2131infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3978infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2132{ 3979{
2133 if (slot < 0) 3980 if (slot < 0)
2134 /* overflow, need to check for all hahs slots */ 3981 /* overflow, need to check for all hash slots */
2135 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3982 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2136 infy_wd (EV_A_ slot, wd, ev); 3983 infy_wd (EV_A_ slot, wd, ev);
2137 else 3984 else
2138 { 3985 {
2139 WL w_; 3986 WL w_;
2140 3987
2141 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3988 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2142 { 3989 {
2143 ev_stat *w = (ev_stat *)w_; 3990 ev_stat *w = (ev_stat *)w_;
2144 w_ = w_->next; /* lets us remove this watcher and all before it */ 3991 w_ = w_->next; /* lets us remove this watcher and all before it */
2145 3992
2146 if (w->wd == wd || wd == -1) 3993 if (w->wd == wd || wd == -1)
2147 { 3994 {
2148 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3995 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2149 { 3996 {
3997 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2150 w->wd = -1; 3998 w->wd = -1;
2151 infy_add (EV_A_ w); /* re-add, no matter what */ 3999 infy_add (EV_A_ w); /* re-add, no matter what */
2152 } 4000 }
2153 4001
2154 stat_timer_cb (EV_A_ &w->timer, 0); 4002 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2159 4007
2160static void 4008static void
2161infy_cb (EV_P_ ev_io *w, int revents) 4009infy_cb (EV_P_ ev_io *w, int revents)
2162{ 4010{
2163 char buf [EV_INOTIFY_BUFSIZE]; 4011 char buf [EV_INOTIFY_BUFSIZE];
2164 struct inotify_event *ev = (struct inotify_event *)buf;
2165 int ofs; 4012 int ofs;
2166 int len = read (fs_fd, buf, sizeof (buf)); 4013 int len = read (fs_fd, buf, sizeof (buf));
2167 4014
2168 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4015 for (ofs = 0; ofs < len; )
4016 {
4017 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2169 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4018 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4019 ofs += sizeof (struct inotify_event) + ev->len;
4020 }
2170} 4021}
2171 4022
2172void inline_size 4023inline_size void ecb_cold
4024ev_check_2625 (EV_P)
4025{
4026 /* kernels < 2.6.25 are borked
4027 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4028 */
4029 if (ev_linux_version () < 0x020619)
4030 return;
4031
4032 fs_2625 = 1;
4033}
4034
4035inline_size int
4036infy_newfd (void)
4037{
4038#if defined IN_CLOEXEC && defined IN_NONBLOCK
4039 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4040 if (fd >= 0)
4041 return fd;
4042#endif
4043 return inotify_init ();
4044}
4045
4046inline_size void
2173infy_init (EV_P) 4047infy_init (EV_P)
2174{ 4048{
2175 if (fs_fd != -2) 4049 if (fs_fd != -2)
2176 return; 4050 return;
2177 4051
4052 fs_fd = -1;
4053
4054 ev_check_2625 (EV_A);
4055
2178 fs_fd = inotify_init (); 4056 fs_fd = infy_newfd ();
2179 4057
2180 if (fs_fd >= 0) 4058 if (fs_fd >= 0)
2181 { 4059 {
4060 fd_intern (fs_fd);
2182 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4061 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2183 ev_set_priority (&fs_w, EV_MAXPRI); 4062 ev_set_priority (&fs_w, EV_MAXPRI);
2184 ev_io_start (EV_A_ &fs_w); 4063 ev_io_start (EV_A_ &fs_w);
4064 ev_unref (EV_A);
2185 } 4065 }
2186} 4066}
2187 4067
2188void inline_size 4068inline_size void
2189infy_fork (EV_P) 4069infy_fork (EV_P)
2190{ 4070{
2191 int slot; 4071 int slot;
2192 4072
2193 if (fs_fd < 0) 4073 if (fs_fd < 0)
2194 return; 4074 return;
2195 4075
4076 ev_ref (EV_A);
4077 ev_io_stop (EV_A_ &fs_w);
2196 close (fs_fd); 4078 close (fs_fd);
2197 fs_fd = inotify_init (); 4079 fs_fd = infy_newfd ();
2198 4080
4081 if (fs_fd >= 0)
4082 {
4083 fd_intern (fs_fd);
4084 ev_io_set (&fs_w, fs_fd, EV_READ);
4085 ev_io_start (EV_A_ &fs_w);
4086 ev_unref (EV_A);
4087 }
4088
2199 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4089 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2200 { 4090 {
2201 WL w_ = fs_hash [slot].head; 4091 WL w_ = fs_hash [slot].head;
2202 fs_hash [slot].head = 0; 4092 fs_hash [slot].head = 0;
2203 4093
2204 while (w_) 4094 while (w_)
… …
2209 w->wd = -1; 4099 w->wd = -1;
2210 4100
2211 if (fs_fd >= 0) 4101 if (fs_fd >= 0)
2212 infy_add (EV_A_ w); /* re-add, no matter what */ 4102 infy_add (EV_A_ w); /* re-add, no matter what */
2213 else 4103 else
4104 {
4105 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4106 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2214 ev_timer_start (EV_A_ &w->timer); 4107 ev_timer_again (EV_A_ &w->timer);
4108 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4109 }
2215 } 4110 }
2216
2217 } 4111 }
2218} 4112}
2219 4113
4114#endif
4115
4116#ifdef _WIN32
4117# define EV_LSTAT(p,b) _stati64 (p, b)
4118#else
4119# define EV_LSTAT(p,b) lstat (p, b)
2220#endif 4120#endif
2221 4121
2222void 4122void
2223ev_stat_stat (EV_P_ ev_stat *w) 4123ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2224{ 4124{
2225 if (lstat (w->path, &w->attr) < 0) 4125 if (lstat (w->path, &w->attr) < 0)
2226 w->attr.st_nlink = 0; 4126 w->attr.st_nlink = 0;
2227 else if (!w->attr.st_nlink) 4127 else if (!w->attr.st_nlink)
2228 w->attr.st_nlink = 1; 4128 w->attr.st_nlink = 1;
… …
2231static void noinline 4131static void noinline
2232stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4132stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2233{ 4133{
2234 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4134 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2235 4135
2236 /* we copy this here each the time so that */ 4136 ev_statdata prev = w->attr;
2237 /* prev has the old value when the callback gets invoked */
2238 w->prev = w->attr;
2239 ev_stat_stat (EV_A_ w); 4137 ev_stat_stat (EV_A_ w);
2240 4138
2241 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4139 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2242 if ( 4140 if (
2243 w->prev.st_dev != w->attr.st_dev 4141 prev.st_dev != w->attr.st_dev
2244 || w->prev.st_ino != w->attr.st_ino 4142 || prev.st_ino != w->attr.st_ino
2245 || w->prev.st_mode != w->attr.st_mode 4143 || prev.st_mode != w->attr.st_mode
2246 || w->prev.st_nlink != w->attr.st_nlink 4144 || prev.st_nlink != w->attr.st_nlink
2247 || w->prev.st_uid != w->attr.st_uid 4145 || prev.st_uid != w->attr.st_uid
2248 || w->prev.st_gid != w->attr.st_gid 4146 || prev.st_gid != w->attr.st_gid
2249 || w->prev.st_rdev != w->attr.st_rdev 4147 || prev.st_rdev != w->attr.st_rdev
2250 || w->prev.st_size != w->attr.st_size 4148 || prev.st_size != w->attr.st_size
2251 || w->prev.st_atime != w->attr.st_atime 4149 || prev.st_atime != w->attr.st_atime
2252 || w->prev.st_mtime != w->attr.st_mtime 4150 || prev.st_mtime != w->attr.st_mtime
2253 || w->prev.st_ctime != w->attr.st_ctime 4151 || prev.st_ctime != w->attr.st_ctime
2254 ) { 4152 ) {
4153 /* we only update w->prev on actual differences */
4154 /* in case we test more often than invoke the callback, */
4155 /* to ensure that prev is always different to attr */
4156 w->prev = prev;
4157
2255 #if EV_USE_INOTIFY 4158 #if EV_USE_INOTIFY
4159 if (fs_fd >= 0)
4160 {
2256 infy_del (EV_A_ w); 4161 infy_del (EV_A_ w);
2257 infy_add (EV_A_ w); 4162 infy_add (EV_A_ w);
2258 ev_stat_stat (EV_A_ w); /* avoid race... */ 4163 ev_stat_stat (EV_A_ w); /* avoid race... */
4164 }
2259 #endif 4165 #endif
2260 4166
2261 ev_feed_event (EV_A_ w, EV_STAT); 4167 ev_feed_event (EV_A_ w, EV_STAT);
2262 } 4168 }
2263} 4169}
2264 4170
2265void 4171void
2266ev_stat_start (EV_P_ ev_stat *w) 4172ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2267{ 4173{
2268 if (expect_false (ev_is_active (w))) 4174 if (expect_false (ev_is_active (w)))
2269 return; 4175 return;
2270 4176
2271 /* since we use memcmp, we need to clear any padding data etc. */
2272 memset (&w->prev, 0, sizeof (ev_statdata));
2273 memset (&w->attr, 0, sizeof (ev_statdata));
2274
2275 ev_stat_stat (EV_A_ w); 4177 ev_stat_stat (EV_A_ w);
2276 4178
4179 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2277 if (w->interval < MIN_STAT_INTERVAL) 4180 w->interval = MIN_STAT_INTERVAL;
2278 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2279 4181
2280 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4182 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2281 ev_set_priority (&w->timer, ev_priority (w)); 4183 ev_set_priority (&w->timer, ev_priority (w));
2282 4184
2283#if EV_USE_INOTIFY 4185#if EV_USE_INOTIFY
2284 infy_init (EV_A); 4186 infy_init (EV_A);
2285 4187
2286 if (fs_fd >= 0) 4188 if (fs_fd >= 0)
2287 infy_add (EV_A_ w); 4189 infy_add (EV_A_ w);
2288 else 4190 else
2289#endif 4191#endif
4192 {
2290 ev_timer_start (EV_A_ &w->timer); 4193 ev_timer_again (EV_A_ &w->timer);
4194 ev_unref (EV_A);
4195 }
2291 4196
2292 ev_start (EV_A_ (W)w, 1); 4197 ev_start (EV_A_ (W)w, 1);
4198
4199 EV_FREQUENT_CHECK;
2293} 4200}
2294 4201
2295void 4202void
2296ev_stat_stop (EV_P_ ev_stat *w) 4203ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2297{ 4204{
2298 clear_pending (EV_A_ (W)w); 4205 clear_pending (EV_A_ (W)w);
2299 if (expect_false (!ev_is_active (w))) 4206 if (expect_false (!ev_is_active (w)))
2300 return; 4207 return;
2301 4208
4209 EV_FREQUENT_CHECK;
4210
2302#if EV_USE_INOTIFY 4211#if EV_USE_INOTIFY
2303 infy_del (EV_A_ w); 4212 infy_del (EV_A_ w);
2304#endif 4213#endif
4214
4215 if (ev_is_active (&w->timer))
4216 {
4217 ev_ref (EV_A);
2305 ev_timer_stop (EV_A_ &w->timer); 4218 ev_timer_stop (EV_A_ &w->timer);
4219 }
2306 4220
2307 ev_stop (EV_A_ (W)w); 4221 ev_stop (EV_A_ (W)w);
4222
4223 EV_FREQUENT_CHECK;
2308} 4224}
2309#endif 4225#endif
2310 4226
2311#if EV_IDLE_ENABLE 4227#if EV_IDLE_ENABLE
2312void 4228void
2313ev_idle_start (EV_P_ ev_idle *w) 4229ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2314{ 4230{
2315 if (expect_false (ev_is_active (w))) 4231 if (expect_false (ev_is_active (w)))
2316 return; 4232 return;
2317 4233
2318 pri_adjust (EV_A_ (W)w); 4234 pri_adjust (EV_A_ (W)w);
4235
4236 EV_FREQUENT_CHECK;
2319 4237
2320 { 4238 {
2321 int active = ++idlecnt [ABSPRI (w)]; 4239 int active = ++idlecnt [ABSPRI (w)];
2322 4240
2323 ++idleall; 4241 ++idleall;
2324 ev_start (EV_A_ (W)w, active); 4242 ev_start (EV_A_ (W)w, active);
2325 4243
2326 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4244 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2327 idles [ABSPRI (w)][active - 1] = w; 4245 idles [ABSPRI (w)][active - 1] = w;
2328 } 4246 }
4247
4248 EV_FREQUENT_CHECK;
2329} 4249}
2330 4250
2331void 4251void
2332ev_idle_stop (EV_P_ ev_idle *w) 4252ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2333{ 4253{
2334 clear_pending (EV_A_ (W)w); 4254 clear_pending (EV_A_ (W)w);
2335 if (expect_false (!ev_is_active (w))) 4255 if (expect_false (!ev_is_active (w)))
2336 return; 4256 return;
2337 4257
4258 EV_FREQUENT_CHECK;
4259
2338 { 4260 {
2339 int active = ((W)w)->active; 4261 int active = ev_active (w);
2340 4262
2341 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4263 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2342 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4264 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2343 4265
2344 ev_stop (EV_A_ (W)w); 4266 ev_stop (EV_A_ (W)w);
2345 --idleall; 4267 --idleall;
2346 } 4268 }
2347}
2348#endif
2349 4269
4270 EV_FREQUENT_CHECK;
4271}
4272#endif
4273
4274#if EV_PREPARE_ENABLE
2350void 4275void
2351ev_prepare_start (EV_P_ ev_prepare *w) 4276ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2352{ 4277{
2353 if (expect_false (ev_is_active (w))) 4278 if (expect_false (ev_is_active (w)))
2354 return; 4279 return;
4280
4281 EV_FREQUENT_CHECK;
2355 4282
2356 ev_start (EV_A_ (W)w, ++preparecnt); 4283 ev_start (EV_A_ (W)w, ++preparecnt);
2357 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4284 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2358 prepares [preparecnt - 1] = w; 4285 prepares [preparecnt - 1] = w;
4286
4287 EV_FREQUENT_CHECK;
2359} 4288}
2360 4289
2361void 4290void
2362ev_prepare_stop (EV_P_ ev_prepare *w) 4291ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2363{ 4292{
2364 clear_pending (EV_A_ (W)w); 4293 clear_pending (EV_A_ (W)w);
2365 if (expect_false (!ev_is_active (w))) 4294 if (expect_false (!ev_is_active (w)))
2366 return; 4295 return;
2367 4296
4297 EV_FREQUENT_CHECK;
4298
2368 { 4299 {
2369 int active = ((W)w)->active; 4300 int active = ev_active (w);
4301
2370 prepares [active - 1] = prepares [--preparecnt]; 4302 prepares [active - 1] = prepares [--preparecnt];
2371 ((W)prepares [active - 1])->active = active; 4303 ev_active (prepares [active - 1]) = active;
2372 } 4304 }
2373 4305
2374 ev_stop (EV_A_ (W)w); 4306 ev_stop (EV_A_ (W)w);
2375}
2376 4307
4308 EV_FREQUENT_CHECK;
4309}
4310#endif
4311
4312#if EV_CHECK_ENABLE
2377void 4313void
2378ev_check_start (EV_P_ ev_check *w) 4314ev_check_start (EV_P_ ev_check *w) EV_THROW
2379{ 4315{
2380 if (expect_false (ev_is_active (w))) 4316 if (expect_false (ev_is_active (w)))
2381 return; 4317 return;
4318
4319 EV_FREQUENT_CHECK;
2382 4320
2383 ev_start (EV_A_ (W)w, ++checkcnt); 4321 ev_start (EV_A_ (W)w, ++checkcnt);
2384 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4322 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2385 checks [checkcnt - 1] = w; 4323 checks [checkcnt - 1] = w;
4324
4325 EV_FREQUENT_CHECK;
2386} 4326}
2387 4327
2388void 4328void
2389ev_check_stop (EV_P_ ev_check *w) 4329ev_check_stop (EV_P_ ev_check *w) EV_THROW
2390{ 4330{
2391 clear_pending (EV_A_ (W)w); 4331 clear_pending (EV_A_ (W)w);
2392 if (expect_false (!ev_is_active (w))) 4332 if (expect_false (!ev_is_active (w)))
2393 return; 4333 return;
2394 4334
4335 EV_FREQUENT_CHECK;
4336
2395 { 4337 {
2396 int active = ((W)w)->active; 4338 int active = ev_active (w);
4339
2397 checks [active - 1] = checks [--checkcnt]; 4340 checks [active - 1] = checks [--checkcnt];
2398 ((W)checks [active - 1])->active = active; 4341 ev_active (checks [active - 1]) = active;
2399 } 4342 }
2400 4343
2401 ev_stop (EV_A_ (W)w); 4344 ev_stop (EV_A_ (W)w);
4345
4346 EV_FREQUENT_CHECK;
2402} 4347}
4348#endif
2403 4349
2404#if EV_EMBED_ENABLE 4350#if EV_EMBED_ENABLE
2405void noinline 4351void noinline
2406ev_embed_sweep (EV_P_ ev_embed *w) 4352ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2407{ 4353{
2408 ev_loop (w->other, EVLOOP_NONBLOCK); 4354 ev_run (w->other, EVRUN_NOWAIT);
2409} 4355}
2410 4356
2411static void 4357static void
2412embed_io_cb (EV_P_ ev_io *io, int revents) 4358embed_io_cb (EV_P_ ev_io *io, int revents)
2413{ 4359{
2414 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4360 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2415 4361
2416 if (ev_cb (w)) 4362 if (ev_cb (w))
2417 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4363 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2418 else 4364 else
2419 ev_loop (w->other, EVLOOP_NONBLOCK); 4365 ev_run (w->other, EVRUN_NOWAIT);
2420} 4366}
2421 4367
2422static void 4368static void
2423embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4369embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2424{ 4370{
2425 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4371 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2426 4372
2427 { 4373 {
2428 struct ev_loop *loop = w->other; 4374 EV_P = w->other;
2429 4375
2430 while (fdchangecnt) 4376 while (fdchangecnt)
2431 { 4377 {
2432 fd_reify (EV_A); 4378 fd_reify (EV_A);
2433 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4379 ev_run (EV_A_ EVRUN_NOWAIT);
2434 } 4380 }
2435 } 4381 }
4382}
4383
4384static void
4385embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4386{
4387 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4388
4389 ev_embed_stop (EV_A_ w);
4390
4391 {
4392 EV_P = w->other;
4393
4394 ev_loop_fork (EV_A);
4395 ev_run (EV_A_ EVRUN_NOWAIT);
4396 }
4397
4398 ev_embed_start (EV_A_ w);
2436} 4399}
2437 4400
2438#if 0 4401#if 0
2439static void 4402static void
2440embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4403embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2442 ev_idle_stop (EV_A_ idle); 4405 ev_idle_stop (EV_A_ idle);
2443} 4406}
2444#endif 4407#endif
2445 4408
2446void 4409void
2447ev_embed_start (EV_P_ ev_embed *w) 4410ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2448{ 4411{
2449 if (expect_false (ev_is_active (w))) 4412 if (expect_false (ev_is_active (w)))
2450 return; 4413 return;
2451 4414
2452 { 4415 {
2453 struct ev_loop *loop = w->other; 4416 EV_P = w->other;
2454 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4417 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2455 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4418 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2456 } 4419 }
4420
4421 EV_FREQUENT_CHECK;
2457 4422
2458 ev_set_priority (&w->io, ev_priority (w)); 4423 ev_set_priority (&w->io, ev_priority (w));
2459 ev_io_start (EV_A_ &w->io); 4424 ev_io_start (EV_A_ &w->io);
2460 4425
2461 ev_prepare_init (&w->prepare, embed_prepare_cb); 4426 ev_prepare_init (&w->prepare, embed_prepare_cb);
2462 ev_set_priority (&w->prepare, EV_MINPRI); 4427 ev_set_priority (&w->prepare, EV_MINPRI);
2463 ev_prepare_start (EV_A_ &w->prepare); 4428 ev_prepare_start (EV_A_ &w->prepare);
2464 4429
4430 ev_fork_init (&w->fork, embed_fork_cb);
4431 ev_fork_start (EV_A_ &w->fork);
4432
2465 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4433 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2466 4434
2467 ev_start (EV_A_ (W)w, 1); 4435 ev_start (EV_A_ (W)w, 1);
4436
4437 EV_FREQUENT_CHECK;
2468} 4438}
2469 4439
2470void 4440void
2471ev_embed_stop (EV_P_ ev_embed *w) 4441ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2472{ 4442{
2473 clear_pending (EV_A_ (W)w); 4443 clear_pending (EV_A_ (W)w);
2474 if (expect_false (!ev_is_active (w))) 4444 if (expect_false (!ev_is_active (w)))
2475 return; 4445 return;
2476 4446
4447 EV_FREQUENT_CHECK;
4448
2477 ev_io_stop (EV_A_ &w->io); 4449 ev_io_stop (EV_A_ &w->io);
2478 ev_prepare_stop (EV_A_ &w->prepare); 4450 ev_prepare_stop (EV_A_ &w->prepare);
4451 ev_fork_stop (EV_A_ &w->fork);
2479 4452
2480 ev_stop (EV_A_ (W)w); 4453 ev_stop (EV_A_ (W)w);
4454
4455 EV_FREQUENT_CHECK;
2481} 4456}
2482#endif 4457#endif
2483 4458
2484#if EV_FORK_ENABLE 4459#if EV_FORK_ENABLE
2485void 4460void
2486ev_fork_start (EV_P_ ev_fork *w) 4461ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2487{ 4462{
2488 if (expect_false (ev_is_active (w))) 4463 if (expect_false (ev_is_active (w)))
2489 return; 4464 return;
4465
4466 EV_FREQUENT_CHECK;
2490 4467
2491 ev_start (EV_A_ (W)w, ++forkcnt); 4468 ev_start (EV_A_ (W)w, ++forkcnt);
2492 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4469 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2493 forks [forkcnt - 1] = w; 4470 forks [forkcnt - 1] = w;
4471
4472 EV_FREQUENT_CHECK;
2494} 4473}
2495 4474
2496void 4475void
2497ev_fork_stop (EV_P_ ev_fork *w) 4476ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2498{ 4477{
2499 clear_pending (EV_A_ (W)w); 4478 clear_pending (EV_A_ (W)w);
2500 if (expect_false (!ev_is_active (w))) 4479 if (expect_false (!ev_is_active (w)))
2501 return; 4480 return;
2502 4481
4482 EV_FREQUENT_CHECK;
4483
2503 { 4484 {
2504 int active = ((W)w)->active; 4485 int active = ev_active (w);
4486
2505 forks [active - 1] = forks [--forkcnt]; 4487 forks [active - 1] = forks [--forkcnt];
2506 ((W)forks [active - 1])->active = active; 4488 ev_active (forks [active - 1]) = active;
2507 } 4489 }
2508 4490
2509 ev_stop (EV_A_ (W)w); 4491 ev_stop (EV_A_ (W)w);
4492
4493 EV_FREQUENT_CHECK;
4494}
4495#endif
4496
4497#if EV_CLEANUP_ENABLE
4498void
4499ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4500{
4501 if (expect_false (ev_is_active (w)))
4502 return;
4503
4504 EV_FREQUENT_CHECK;
4505
4506 ev_start (EV_A_ (W)w, ++cleanupcnt);
4507 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4508 cleanups [cleanupcnt - 1] = w;
4509
4510 /* cleanup watchers should never keep a refcount on the loop */
4511 ev_unref (EV_A);
4512 EV_FREQUENT_CHECK;
4513}
4514
4515void
4516ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4517{
4518 clear_pending (EV_A_ (W)w);
4519 if (expect_false (!ev_is_active (w)))
4520 return;
4521
4522 EV_FREQUENT_CHECK;
4523 ev_ref (EV_A);
4524
4525 {
4526 int active = ev_active (w);
4527
4528 cleanups [active - 1] = cleanups [--cleanupcnt];
4529 ev_active (cleanups [active - 1]) = active;
4530 }
4531
4532 ev_stop (EV_A_ (W)w);
4533
4534 EV_FREQUENT_CHECK;
2510} 4535}
2511#endif 4536#endif
2512 4537
2513#if EV_ASYNC_ENABLE 4538#if EV_ASYNC_ENABLE
2514void 4539void
2515ev_async_start (EV_P_ ev_async *w) 4540ev_async_start (EV_P_ ev_async *w) EV_THROW
2516{ 4541{
2517 if (expect_false (ev_is_active (w))) 4542 if (expect_false (ev_is_active (w)))
2518 return; 4543 return;
2519 4544
4545 w->sent = 0;
4546
2520 evpipe_init (EV_A); 4547 evpipe_init (EV_A);
4548
4549 EV_FREQUENT_CHECK;
2521 4550
2522 ev_start (EV_A_ (W)w, ++asynccnt); 4551 ev_start (EV_A_ (W)w, ++asynccnt);
2523 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4552 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2524 asyncs [asynccnt - 1] = w; 4553 asyncs [asynccnt - 1] = w;
4554
4555 EV_FREQUENT_CHECK;
2525} 4556}
2526 4557
2527void 4558void
2528ev_async_stop (EV_P_ ev_async *w) 4559ev_async_stop (EV_P_ ev_async *w) EV_THROW
2529{ 4560{
2530 clear_pending (EV_A_ (W)w); 4561 clear_pending (EV_A_ (W)w);
2531 if (expect_false (!ev_is_active (w))) 4562 if (expect_false (!ev_is_active (w)))
2532 return; 4563 return;
2533 4564
4565 EV_FREQUENT_CHECK;
4566
2534 { 4567 {
2535 int active = ((W)w)->active; 4568 int active = ev_active (w);
4569
2536 asyncs [active - 1] = asyncs [--asynccnt]; 4570 asyncs [active - 1] = asyncs [--asynccnt];
2537 ((W)asyncs [active - 1])->active = active; 4571 ev_active (asyncs [active - 1]) = active;
2538 } 4572 }
2539 4573
2540 ev_stop (EV_A_ (W)w); 4574 ev_stop (EV_A_ (W)w);
4575
4576 EV_FREQUENT_CHECK;
2541} 4577}
2542 4578
2543void 4579void
2544ev_async_send (EV_P_ ev_async *w) 4580ev_async_send (EV_P_ ev_async *w) EV_THROW
2545{ 4581{
2546 w->sent = 1; 4582 w->sent = 1;
2547 evpipe_write (EV_A_ &gotasync); 4583 evpipe_write (EV_A_ &async_pending);
2548} 4584}
2549#endif 4585#endif
2550 4586
2551/*****************************************************************************/ 4587/*****************************************************************************/
2552 4588
… …
2562once_cb (EV_P_ struct ev_once *once, int revents) 4598once_cb (EV_P_ struct ev_once *once, int revents)
2563{ 4599{
2564 void (*cb)(int revents, void *arg) = once->cb; 4600 void (*cb)(int revents, void *arg) = once->cb;
2565 void *arg = once->arg; 4601 void *arg = once->arg;
2566 4602
2567 ev_io_stop (EV_A_ &once->io); 4603 ev_io_stop (EV_A_ &once->io);
2568 ev_timer_stop (EV_A_ &once->to); 4604 ev_timer_stop (EV_A_ &once->to);
2569 ev_free (once); 4605 ev_free (once);
2570 4606
2571 cb (revents, arg); 4607 cb (revents, arg);
2572} 4608}
2573 4609
2574static void 4610static void
2575once_cb_io (EV_P_ ev_io *w, int revents) 4611once_cb_io (EV_P_ ev_io *w, int revents)
2576{ 4612{
2577 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4613 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4614
4615 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2578} 4616}
2579 4617
2580static void 4618static void
2581once_cb_to (EV_P_ ev_timer *w, int revents) 4619once_cb_to (EV_P_ ev_timer *w, int revents)
2582{ 4620{
2583 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4621 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4622
4623 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2584} 4624}
2585 4625
2586void 4626void
2587ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4627ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2588{ 4628{
2589 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4629 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2590 4630
2591 if (expect_false (!once)) 4631 if (expect_false (!once))
2592 { 4632 {
2593 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4633 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2594 return; 4634 return;
2595 } 4635 }
2596 4636
2597 once->cb = cb; 4637 once->cb = cb;
2598 once->arg = arg; 4638 once->arg = arg;
… …
2610 ev_timer_set (&once->to, timeout, 0.); 4650 ev_timer_set (&once->to, timeout, 0.);
2611 ev_timer_start (EV_A_ &once->to); 4651 ev_timer_start (EV_A_ &once->to);
2612 } 4652 }
2613} 4653}
2614 4654
4655/*****************************************************************************/
4656
4657#if EV_WALK_ENABLE
4658void ecb_cold
4659ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4660{
4661 int i, j;
4662 ev_watcher_list *wl, *wn;
4663
4664 if (types & (EV_IO | EV_EMBED))
4665 for (i = 0; i < anfdmax; ++i)
4666 for (wl = anfds [i].head; wl; )
4667 {
4668 wn = wl->next;
4669
4670#if EV_EMBED_ENABLE
4671 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4672 {
4673 if (types & EV_EMBED)
4674 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4675 }
4676 else
4677#endif
4678#if EV_USE_INOTIFY
4679 if (ev_cb ((ev_io *)wl) == infy_cb)
4680 ;
4681 else
4682#endif
4683 if ((ev_io *)wl != &pipe_w)
4684 if (types & EV_IO)
4685 cb (EV_A_ EV_IO, wl);
4686
4687 wl = wn;
4688 }
4689
4690 if (types & (EV_TIMER | EV_STAT))
4691 for (i = timercnt + HEAP0; i-- > HEAP0; )
4692#if EV_STAT_ENABLE
4693 /*TODO: timer is not always active*/
4694 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4695 {
4696 if (types & EV_STAT)
4697 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4698 }
4699 else
4700#endif
4701 if (types & EV_TIMER)
4702 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4703
4704#if EV_PERIODIC_ENABLE
4705 if (types & EV_PERIODIC)
4706 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4707 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4708#endif
4709
4710#if EV_IDLE_ENABLE
4711 if (types & EV_IDLE)
4712 for (j = NUMPRI; j--; )
4713 for (i = idlecnt [j]; i--; )
4714 cb (EV_A_ EV_IDLE, idles [j][i]);
4715#endif
4716
4717#if EV_FORK_ENABLE
4718 if (types & EV_FORK)
4719 for (i = forkcnt; i--; )
4720 if (ev_cb (forks [i]) != embed_fork_cb)
4721 cb (EV_A_ EV_FORK, forks [i]);
4722#endif
4723
4724#if EV_ASYNC_ENABLE
4725 if (types & EV_ASYNC)
4726 for (i = asynccnt; i--; )
4727 cb (EV_A_ EV_ASYNC, asyncs [i]);
4728#endif
4729
4730#if EV_PREPARE_ENABLE
4731 if (types & EV_PREPARE)
4732 for (i = preparecnt; i--; )
4733# if EV_EMBED_ENABLE
4734 if (ev_cb (prepares [i]) != embed_prepare_cb)
4735# endif
4736 cb (EV_A_ EV_PREPARE, prepares [i]);
4737#endif
4738
4739#if EV_CHECK_ENABLE
4740 if (types & EV_CHECK)
4741 for (i = checkcnt; i--; )
4742 cb (EV_A_ EV_CHECK, checks [i]);
4743#endif
4744
4745#if EV_SIGNAL_ENABLE
4746 if (types & EV_SIGNAL)
4747 for (i = 0; i < EV_NSIG - 1; ++i)
4748 for (wl = signals [i].head; wl; )
4749 {
4750 wn = wl->next;
4751 cb (EV_A_ EV_SIGNAL, wl);
4752 wl = wn;
4753 }
4754#endif
4755
4756#if EV_CHILD_ENABLE
4757 if (types & EV_CHILD)
4758 for (i = (EV_PID_HASHSIZE); i--; )
4759 for (wl = childs [i]; wl; )
4760 {
4761 wn = wl->next;
4762 cb (EV_A_ EV_CHILD, wl);
4763 wl = wn;
4764 }
4765#endif
4766/* EV_STAT 0x00001000 /* stat data changed */
4767/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4768}
4769#endif
4770
2615#if EV_MULTIPLICITY 4771#if EV_MULTIPLICITY
2616 #include "ev_wrap.h" 4772 #include "ev_wrap.h"
2617#endif 4773#endif
2618 4774
2619#ifdef __cplusplus
2620}
2621#endif
2622

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