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Comparing libev/ev.c (file contents):
Revision 1.249 by root, Wed May 21 23:30:52 2008 UTC vs.
Revision 1.476 by root, Fri May 1 17:23:34 2015 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) 2007,2008,2009,2010,2011,2012,2013 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# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
269
168#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
272# define EV_USE_MONOTONIC EV_FEATURE_OS
273# else
169# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
275# endif
170#endif 276#endif
171 277
172#ifndef EV_USE_REALTIME 278#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 280#endif
175 281
176#ifndef EV_USE_NANOSLEEP 282#ifndef EV_USE_NANOSLEEP
283# if _POSIX_C_SOURCE >= 199309L
284# define EV_USE_NANOSLEEP EV_FEATURE_OS
285# else
177# define EV_USE_NANOSLEEP 0 286# define EV_USE_NANOSLEEP 0
287# endif
178#endif 288#endif
179 289
180#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 292#endif
183 293
184#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
185# ifdef _WIN32 295# ifdef _WIN32
186# define EV_USE_POLL 0 296# define EV_USE_POLL 0
187# else 297# else
188# define EV_USE_POLL 1 298# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 299# endif
190#endif 300#endif
191 301
192#ifndef EV_USE_EPOLL 302#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 304# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 305# else
196# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
197# endif 307# endif
198#endif 308#endif
199 309
… …
205# define EV_USE_PORT 0 315# define EV_USE_PORT 0
206#endif 316#endif
207 317
208#ifndef EV_USE_INOTIFY 318#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 320# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 321# else
212# define EV_USE_INOTIFY 0 322# define EV_USE_INOTIFY 0
213# endif 323# endif
214#endif 324#endif
215 325
216#ifndef EV_PID_HASHSIZE 326#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 327# 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 328#endif
223 329
224#ifndef EV_INOTIFY_HASHSIZE 330#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 331# 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 332#endif
231 333
232#ifndef EV_USE_EVENTFD 334#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 335# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 336# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 337# else
236# define EV_USE_EVENTFD 0 338# define EV_USE_EVENTFD 0
237# endif 339# endif
238#endif 340#endif
239 341
342#ifndef EV_USE_SIGNALFD
343# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
344# define EV_USE_SIGNALFD EV_FEATURE_OS
345# else
346# define EV_USE_SIGNALFD 0
347# endif
348#endif
349
240#if 0 /* debugging */ 350#if 0 /* debugging */
241# define EV_VERIFY 1 351# define EV_VERIFY 3
242# define EV_USE_4HEAP 1 352# define EV_USE_4HEAP 1
243# define EV_HEAP_CACHE_AT 1 353# define EV_HEAP_CACHE_AT 1
244#endif 354#endif
245 355
356#ifndef EV_VERIFY
357# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
358#endif
359
246#ifndef EV_USE_4HEAP 360#ifndef EV_USE_4HEAP
247# define EV_USE_4HEAP !EV_MINIMAL 361# define EV_USE_4HEAP EV_FEATURE_DATA
248#endif 362#endif
249 363
250#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
251# define EV_HEAP_CACHE_AT !EV_MINIMAL 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
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
383
384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
385/* which makes programs even slower. might work on other unices, too. */
386#if EV_USE_CLOCK_SYSCALL
387# include <sys/syscall.h>
388# ifdef SYS_clock_gettime
389# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
390# undef EV_USE_MONOTONIC
391# define EV_USE_MONOTONIC 1
392# else
393# undef EV_USE_CLOCK_SYSCALL
394# define EV_USE_CLOCK_SYSCALL 0
395# endif
252#endif 396#endif
253 397
254/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
255 399
256#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
… …
267# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
268# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
269#endif 413#endif
270 414
271#if !EV_USE_NANOSLEEP 415#if !EV_USE_NANOSLEEP
272# ifndef _WIN32 416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
273# include <sys/select.h> 418# include <sys/select.h>
274# endif 419# endif
275#endif 420#endif
276 421
277#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
423# include <sys/statfs.h>
278# include <sys/inotify.h> 424# include <sys/inotify.h>
425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
426# ifndef IN_DONT_FOLLOW
427# undef EV_USE_INOTIFY
428# define EV_USE_INOTIFY 0
279#endif 429# endif
280
281#if EV_SELECT_IS_WINSOCKET
282# include <winsock.h>
283#endif 430#endif
284 431
285#if EV_USE_EVENTFD 432#if EV_USE_EVENTFD
286/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
287# include <stdint.h> 434# include <stdint.h>
288# ifdef __cplusplus 435# ifndef EFD_NONBLOCK
289extern "C" { 436# define EFD_NONBLOCK O_NONBLOCK
290# endif 437# endif
291int eventfd (unsigned int initval, int flags); 438# ifndef EFD_CLOEXEC
292# ifdef __cplusplus 439# ifdef O_CLOEXEC
293} 440# define EFD_CLOEXEC O_CLOEXEC
441# else
442# define EFD_CLOEXEC 02000000
443# endif
294# endif 444# endif
445EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
446#endif
447
448#if EV_USE_SIGNALFD
449/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
450# include <stdint.h>
451# ifndef SFD_NONBLOCK
452# define SFD_NONBLOCK O_NONBLOCK
453# endif
454# ifndef SFD_CLOEXEC
455# ifdef O_CLOEXEC
456# define SFD_CLOEXEC O_CLOEXEC
457# else
458# define SFD_CLOEXEC 02000000
459# endif
460# endif
461EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
462
463struct signalfd_siginfo
464{
465 uint32_t ssi_signo;
466 char pad[128 - sizeof (uint32_t)];
467};
295#endif 468#endif
296 469
297/**/ 470/**/
298 471
299/* EV_VERIFY: enable internal consistency checks
300 * undefined or zero: no verification done or available
301 * 1 or higher: ev_loop_verify function available
302 * 2 or higher: ev_loop_verify is called frequently
303 */
304#if EV_VERIFY >= 1 472#if EV_VERIFY >= 3
305# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 473# define EV_FREQUENT_CHECK ev_verify (EV_A)
306#else 474#else
307# define EV_FREQUENT_CHECK do { } while (0) 475# define EV_FREQUENT_CHECK do { } while (0)
308#endif 476#endif
309 477
310/* 478/*
311 * This is used to avoid floating point rounding problems. 479 * This is used to work around floating point rounding problems.
312 * It is added to ev_rt_now when scheduling periodics
313 * to ensure progress, time-wise, even when rounding
314 * errors are against us.
315 * This value is good at least till the year 4000. 480 * This value is good at least till the year 4000.
316 * Better solutions welcome.
317 */ 481 */
318#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
319 484
320#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 485#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
321#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
322/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
323 487
488#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
489#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
490
491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
492/* ECB.H BEGIN */
493/*
494 * libecb - http://software.schmorp.de/pkg/libecb
495 *
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
499 *
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
502 *
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
505 *
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
509 *
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
531 */
532
533#ifndef ECB_H
534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010004
538
539#ifdef _WIN32
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
324#if __GNUC__ >= 4 546 #if __GNUC__
325# define expect(expr,value) __builtin_expect ((expr),(value)) 547 typedef signed long long int64_t;
326# define noinline __attribute__ ((noinline)) 548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
327#else 562#else
328# define expect(expr,value) (expr) 563 #include <inttypes.h>
329# define noinline 564 #if UINTMAX_MAX > 0xffffffffU
330# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 565 #define ECB_PTRSIZE 8
331# define inline 566 #else
567 #define ECB_PTRSIZE 4
568 #endif
332# endif 569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
333#endif 580 #endif
581#endif
334 582
583/* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
586 * or so.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
589 */
590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
592#else
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
610#define ECB_CPP (__cplusplus+0)
611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
633
634/*****************************************************************************/
635
636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
638
639#if ECB_NO_THREADS
640 #define ECB_NO_SMP 1
641#endif
642
643#if ECB_NO_SMP
644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#ifndef ECB_MEMORY_FENCE
653 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
654 #if __i386 || __i386__
655 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
656 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif ECB_GCC_AMD64
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
664 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
665 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
666 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
667 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
668 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
669 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
670 #elif __aarch64__
671 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
672 #elif (__sparc || __sparc__) && !__sparcv8
673 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
674 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
675 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
676 #elif defined __s390__ || defined __s390x__
677 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
678 #elif defined __mips__
679 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
680 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
682 #elif defined __alpha__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
684 #elif defined __hppa__
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
686 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
687 #elif defined __ia64__
688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
689 #elif defined __m68k__
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
691 #elif defined __m88k__
692 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
693 #elif defined __sh__
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
695 #endif
696 #endif
697#endif
698
699#ifndef ECB_MEMORY_FENCE
700 #if ECB_GCC_VERSION(4,7)
701 /* see comment below (stdatomic.h) about the C11 memory model. */
702 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
703 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
704 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
705
706 #elif ECB_CLANG_EXTENSION(c_atomic)
707 /* see comment below (stdatomic.h) about the C11 memory model. */
708 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
709 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
710 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
711
712 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
713 #define ECB_MEMORY_FENCE __sync_synchronize ()
714 #elif _MSC_VER >= 1500 /* VC++ 2008 */
715 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
716 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
717 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
718 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
719 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
720 #elif _MSC_VER >= 1400 /* VC++ 2005 */
721 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
722 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
723 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
724 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
725 #elif defined _WIN32
726 #include <WinNT.h>
727 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
728 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
729 #include <mbarrier.h>
730 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
731 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
732 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
733 #elif __xlC__
734 #define ECB_MEMORY_FENCE __sync ()
735 #endif
736#endif
737
738#ifndef ECB_MEMORY_FENCE
739 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
740 /* we assume that these memory fences work on all variables/all memory accesses, */
741 /* not just C11 atomics and atomic accesses */
742 #include <stdatomic.h>
743 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
744 /* any fence other than seq_cst, which isn't very efficient for us. */
745 /* Why that is, we don't know - either the C11 memory model is quite useless */
746 /* for most usages, or gcc and clang have a bug */
747 /* I *currently* lean towards the latter, and inefficiently implement */
748 /* all three of ecb's fences as a seq_cst fence */
749 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
750 /* for all __atomic_thread_fence's except seq_cst */
751 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
752 #endif
753#endif
754
755#ifndef ECB_MEMORY_FENCE
756 #if !ECB_AVOID_PTHREADS
757 /*
758 * if you get undefined symbol references to pthread_mutex_lock,
759 * or failure to find pthread.h, then you should implement
760 * the ECB_MEMORY_FENCE operations for your cpu/compiler
761 * OR provide pthread.h and link against the posix thread library
762 * of your system.
763 */
764 #include <pthread.h>
765 #define ECB_NEEDS_PTHREADS 1
766 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
767
768 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
769 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
770 #endif
771#endif
772
773#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
774 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
775#endif
776
777#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
778 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
779#endif
780
781/*****************************************************************************/
782
783#if ECB_CPP
784 #define ecb_inline static inline
785#elif ECB_GCC_VERSION(2,5)
786 #define ecb_inline static __inline__
787#elif ECB_C99
788 #define ecb_inline static inline
789#else
790 #define ecb_inline static
791#endif
792
793#if ECB_GCC_VERSION(3,3)
794 #define ecb_restrict __restrict__
795#elif ECB_C99
796 #define ecb_restrict restrict
797#else
798 #define ecb_restrict
799#endif
800
801typedef int ecb_bool;
802
803#define ECB_CONCAT_(a, b) a ## b
804#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
805#define ECB_STRINGIFY_(a) # a
806#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
807#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
808
809#define ecb_function_ ecb_inline
810
811#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
812 #define ecb_attribute(attrlist) __attribute__ (attrlist)
813#else
814 #define ecb_attribute(attrlist)
815#endif
816
817#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
818 #define ecb_is_constant(expr) __builtin_constant_p (expr)
819#else
820 /* possible C11 impl for integral types
821 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
822 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
823
824 #define ecb_is_constant(expr) 0
825#endif
826
827#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
828 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
829#else
830 #define ecb_expect(expr,value) (expr)
831#endif
832
833#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
834 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
835#else
836 #define ecb_prefetch(addr,rw,locality)
837#endif
838
839/* no emulation for ecb_decltype */
840#if ECB_CPP11
841 // older implementations might have problems with decltype(x)::type, work around it
842 template<class T> struct ecb_decltype_t { typedef T type; };
843 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
844#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
845 #define ecb_decltype(x) __typeof__ (x)
846#endif
847
848#if _MSC_VER >= 1300
849 #define ecb_deprecated __declspec (deprecated)
850#else
851 #define ecb_deprecated ecb_attribute ((__deprecated__))
852#endif
853
854#if _MSC_VER >= 1500
855 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
856#elif ECB_GCC_VERSION(4,5)
857 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
858#else
859 #define ecb_deprecated_message(msg) ecb_deprecated
860#endif
861
862#if _MSC_VER >= 1400
863 #define ecb_noinline __declspec (noinline)
864#else
865 #define ecb_noinline ecb_attribute ((__noinline__))
866#endif
867
868#define ecb_unused ecb_attribute ((__unused__))
869#define ecb_const ecb_attribute ((__const__))
870#define ecb_pure ecb_attribute ((__pure__))
871
872#if ECB_C11 || __IBMC_NORETURN
873 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
874 #define ecb_noreturn _Noreturn
875#elif ECB_CPP11
876 #define ecb_noreturn [[noreturn]]
877#elif _MSC_VER >= 1200
878 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
879 #define ecb_noreturn __declspec (noreturn)
880#else
881 #define ecb_noreturn ecb_attribute ((__noreturn__))
882#endif
883
884#if ECB_GCC_VERSION(4,3)
885 #define ecb_artificial ecb_attribute ((__artificial__))
886 #define ecb_hot ecb_attribute ((__hot__))
887 #define ecb_cold ecb_attribute ((__cold__))
888#else
889 #define ecb_artificial
890 #define ecb_hot
891 #define ecb_cold
892#endif
893
894/* put around conditional expressions if you are very sure that the */
895/* expression is mostly true or mostly false. note that these return */
896/* booleans, not the expression. */
335#define expect_false(expr) expect ((expr) != 0, 0) 897#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
336#define expect_true(expr) expect ((expr) != 0, 1) 898#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
899/* for compatibility to the rest of the world */
900#define ecb_likely(expr) ecb_expect_true (expr)
901#define ecb_unlikely(expr) ecb_expect_false (expr)
902
903/* count trailing zero bits and count # of one bits */
904#if ECB_GCC_VERSION(3,4) \
905 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
906 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
907 && ECB_CLANG_BUILTIN(__builtin_popcount))
908 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
909 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
910 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
911 #define ecb_ctz32(x) __builtin_ctz (x)
912 #define ecb_ctz64(x) __builtin_ctzll (x)
913 #define ecb_popcount32(x) __builtin_popcount (x)
914 /* no popcountll */
915#else
916 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
917 ecb_function_ ecb_const int
918 ecb_ctz32 (uint32_t x)
919 {
920 int r = 0;
921
922 x &= ~x + 1; /* this isolates the lowest bit */
923
924#if ECB_branchless_on_i386
925 r += !!(x & 0xaaaaaaaa) << 0;
926 r += !!(x & 0xcccccccc) << 1;
927 r += !!(x & 0xf0f0f0f0) << 2;
928 r += !!(x & 0xff00ff00) << 3;
929 r += !!(x & 0xffff0000) << 4;
930#else
931 if (x & 0xaaaaaaaa) r += 1;
932 if (x & 0xcccccccc) r += 2;
933 if (x & 0xf0f0f0f0) r += 4;
934 if (x & 0xff00ff00) r += 8;
935 if (x & 0xffff0000) r += 16;
936#endif
937
938 return r;
939 }
940
941 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
942 ecb_function_ ecb_const int
943 ecb_ctz64 (uint64_t x)
944 {
945 int shift = x & 0xffffffffU ? 0 : 32;
946 return ecb_ctz32 (x >> shift) + shift;
947 }
948
949 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
950 ecb_function_ ecb_const int
951 ecb_popcount32 (uint32_t x)
952 {
953 x -= (x >> 1) & 0x55555555;
954 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
955 x = ((x >> 4) + x) & 0x0f0f0f0f;
956 x *= 0x01010101;
957
958 return x >> 24;
959 }
960
961 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
962 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
963 {
964 int r = 0;
965
966 if (x >> 16) { x >>= 16; r += 16; }
967 if (x >> 8) { x >>= 8; r += 8; }
968 if (x >> 4) { x >>= 4; r += 4; }
969 if (x >> 2) { x >>= 2; r += 2; }
970 if (x >> 1) { r += 1; }
971
972 return r;
973 }
974
975 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
976 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
977 {
978 int r = 0;
979
980 if (x >> 32) { x >>= 32; r += 32; }
981
982 return r + ecb_ld32 (x);
983 }
984#endif
985
986ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
987ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
988ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
989ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
990
991ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
992ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
993{
994 return ( (x * 0x0802U & 0x22110U)
995 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
996}
997
998ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
999ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1000{
1001 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1002 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1003 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1004 x = ( x >> 8 ) | ( x << 8);
1005
1006 return x;
1007}
1008
1009ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1010ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1011{
1012 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1013 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1014 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1015 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1016 x = ( x >> 16 ) | ( x << 16);
1017
1018 return x;
1019}
1020
1021/* popcount64 is only available on 64 bit cpus as gcc builtin */
1022/* so for this version we are lazy */
1023ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1024ecb_function_ ecb_const int
1025ecb_popcount64 (uint64_t x)
1026{
1027 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1028}
1029
1030ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1031ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1032ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1033ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1034ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1035ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1036ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1037ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1038
1039ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1040ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1041ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1042ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1043ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1044ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1045ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1046ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1047
1048#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1049 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1050 #define ecb_bswap16(x) __builtin_bswap16 (x)
1051 #else
1052 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1053 #endif
1054 #define ecb_bswap32(x) __builtin_bswap32 (x)
1055 #define ecb_bswap64(x) __builtin_bswap64 (x)
1056#elif _MSC_VER
1057 #include <stdlib.h>
1058 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1059 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1060 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1061#else
1062 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1063 ecb_function_ ecb_const uint16_t
1064 ecb_bswap16 (uint16_t x)
1065 {
1066 return ecb_rotl16 (x, 8);
1067 }
1068
1069 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1070 ecb_function_ ecb_const uint32_t
1071 ecb_bswap32 (uint32_t x)
1072 {
1073 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1074 }
1075
1076 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1077 ecb_function_ ecb_const uint64_t
1078 ecb_bswap64 (uint64_t x)
1079 {
1080 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1081 }
1082#endif
1083
1084#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1085 #define ecb_unreachable() __builtin_unreachable ()
1086#else
1087 /* this seems to work fine, but gcc always emits a warning for it :/ */
1088 ecb_inline ecb_noreturn void ecb_unreachable (void);
1089 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1090#endif
1091
1092/* try to tell the compiler that some condition is definitely true */
1093#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1094
1095ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
1096ecb_inline ecb_const unsigned char
1097ecb_byteorder_helper (void)
1098{
1099 /* the union code still generates code under pressure in gcc, */
1100 /* but less than using pointers, and always seems to */
1101 /* successfully return a constant. */
1102 /* the reason why we have this horrible preprocessor mess */
1103 /* is to avoid it in all cases, at least on common architectures */
1104 /* or when using a recent enough gcc version (>= 4.6) */
1105#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
1106 return 0x44;
1107#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1108 return 0x44;
1109#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1110 return 0x11;
1111#else
1112 union
1113 {
1114 uint32_t i;
1115 uint8_t c;
1116 } u = { 0x11223344 };
1117 return u.c;
1118#endif
1119}
1120
1121ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1122ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1123ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1124ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1125
1126#if ECB_GCC_VERSION(3,0) || ECB_C99
1127 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1128#else
1129 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1130#endif
1131
1132#if ECB_CPP
1133 template<typename T>
1134 static inline T ecb_div_rd (T val, T div)
1135 {
1136 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1137 }
1138 template<typename T>
1139 static inline T ecb_div_ru (T val, T div)
1140 {
1141 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1142 }
1143#else
1144 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1145 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1146#endif
1147
1148#if ecb_cplusplus_does_not_suck
1149 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1150 template<typename T, int N>
1151 static inline int ecb_array_length (const T (&arr)[N])
1152 {
1153 return N;
1154 }
1155#else
1156 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1157#endif
1158
1159/*******************************************************************************/
1160/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1161
1162/* basically, everything uses "ieee pure-endian" floating point numbers */
1163/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1164#if 0 \
1165 || __i386 || __i386__ \
1166 || ECB_GCC_AMD64 \
1167 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1168 || defined __s390__ || defined __s390x__ \
1169 || defined __mips__ \
1170 || defined __alpha__ \
1171 || defined __hppa__ \
1172 || defined __ia64__ \
1173 || defined __m68k__ \
1174 || defined __m88k__ \
1175 || defined __sh__ \
1176 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1177 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1178 || defined __aarch64__
1179 #define ECB_STDFP 1
1180 #include <string.h> /* for memcpy */
1181#else
1182 #define ECB_STDFP 0
1183#endif
1184
1185#ifndef ECB_NO_LIBM
1186
1187 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1188
1189 /* only the oldest of old doesn't have this one. solaris. */
1190 #ifdef INFINITY
1191 #define ECB_INFINITY INFINITY
1192 #else
1193 #define ECB_INFINITY HUGE_VAL
1194 #endif
1195
1196 #ifdef NAN
1197 #define ECB_NAN NAN
1198 #else
1199 #define ECB_NAN ECB_INFINITY
1200 #endif
1201
1202 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1203 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1204 #define ecb_frexpf(x,e) frexpf ((x), (e))
1205 #else
1206 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1207 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1208 #endif
1209
1210 /* converts an ieee half/binary16 to a float */
1211 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1212 ecb_function_ ecb_const float
1213 ecb_binary16_to_float (uint16_t x)
1214 {
1215 int e = (x >> 10) & 0x1f;
1216 int m = x & 0x3ff;
1217 float r;
1218
1219 if (!e ) r = ecb_ldexpf (m , -24);
1220 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
1221 else if (m ) r = ECB_NAN;
1222 else r = ECB_INFINITY;
1223
1224 return x & 0x8000 ? -r : r;
1225 }
1226
1227 /* convert a float to ieee single/binary32 */
1228 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1229 ecb_function_ ecb_const uint32_t
1230 ecb_float_to_binary32 (float x)
1231 {
1232 uint32_t r;
1233
1234 #if ECB_STDFP
1235 memcpy (&r, &x, 4);
1236 #else
1237 /* slow emulation, works for anything but -0 */
1238 uint32_t m;
1239 int e;
1240
1241 if (x == 0e0f ) return 0x00000000U;
1242 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1243 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1244 if (x != x ) return 0x7fbfffffU;
1245
1246 m = ecb_frexpf (x, &e) * 0x1000000U;
1247
1248 r = m & 0x80000000U;
1249
1250 if (r)
1251 m = -m;
1252
1253 if (e <= -126)
1254 {
1255 m &= 0xffffffU;
1256 m >>= (-125 - e);
1257 e = -126;
1258 }
1259
1260 r |= (e + 126) << 23;
1261 r |= m & 0x7fffffU;
1262 #endif
1263
1264 return r;
1265 }
1266
1267 /* converts an ieee single/binary32 to a float */
1268 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1269 ecb_function_ ecb_const float
1270 ecb_binary32_to_float (uint32_t x)
1271 {
1272 float r;
1273
1274 #if ECB_STDFP
1275 memcpy (&r, &x, 4);
1276 #else
1277 /* emulation, only works for normals and subnormals and +0 */
1278 int neg = x >> 31;
1279 int e = (x >> 23) & 0xffU;
1280
1281 x &= 0x7fffffU;
1282
1283 if (e)
1284 x |= 0x800000U;
1285 else
1286 e = 1;
1287
1288 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1289 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1290
1291 r = neg ? -r : r;
1292 #endif
1293
1294 return r;
1295 }
1296
1297 /* convert a double to ieee double/binary64 */
1298 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1299 ecb_function_ ecb_const uint64_t
1300 ecb_double_to_binary64 (double x)
1301 {
1302 uint64_t r;
1303
1304 #if ECB_STDFP
1305 memcpy (&r, &x, 8);
1306 #else
1307 /* slow emulation, works for anything but -0 */
1308 uint64_t m;
1309 int e;
1310
1311 if (x == 0e0 ) return 0x0000000000000000U;
1312 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1313 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1314 if (x != x ) return 0X7ff7ffffffffffffU;
1315
1316 m = frexp (x, &e) * 0x20000000000000U;
1317
1318 r = m & 0x8000000000000000;;
1319
1320 if (r)
1321 m = -m;
1322
1323 if (e <= -1022)
1324 {
1325 m &= 0x1fffffffffffffU;
1326 m >>= (-1021 - e);
1327 e = -1022;
1328 }
1329
1330 r |= ((uint64_t)(e + 1022)) << 52;
1331 r |= m & 0xfffffffffffffU;
1332 #endif
1333
1334 return r;
1335 }
1336
1337 /* converts an ieee double/binary64 to a double */
1338 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1339 ecb_function_ ecb_const double
1340 ecb_binary64_to_double (uint64_t x)
1341 {
1342 double r;
1343
1344 #if ECB_STDFP
1345 memcpy (&r, &x, 8);
1346 #else
1347 /* emulation, only works for normals and subnormals and +0 */
1348 int neg = x >> 63;
1349 int e = (x >> 52) & 0x7ffU;
1350
1351 x &= 0xfffffffffffffU;
1352
1353 if (e)
1354 x |= 0x10000000000000U;
1355 else
1356 e = 1;
1357
1358 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1359 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1360
1361 r = neg ? -r : r;
1362 #endif
1363
1364 return r;
1365 }
1366
1367#endif
1368
1369#endif
1370
1371/* ECB.H END */
1372
1373#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1374/* if your architecture doesn't need memory fences, e.g. because it is
1375 * single-cpu/core, or if you use libev in a project that doesn't use libev
1376 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1377 * libev, in which cases the memory fences become nops.
1378 * alternatively, you can remove this #error and link against libpthread,
1379 * which will then provide the memory fences.
1380 */
1381# error "memory fences not defined for your architecture, please report"
1382#endif
1383
1384#ifndef ECB_MEMORY_FENCE
1385# define ECB_MEMORY_FENCE do { } while (0)
1386# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1387# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1388#endif
1389
1390#define expect_false(cond) ecb_expect_false (cond)
1391#define expect_true(cond) ecb_expect_true (cond)
1392#define noinline ecb_noinline
1393
337#define inline_size static inline 1394#define inline_size ecb_inline
338 1395
339#if EV_MINIMAL 1396#if EV_FEATURE_CODE
1397# define inline_speed ecb_inline
1398#else
340# define inline_speed static noinline 1399# define inline_speed static noinline
1400#endif
1401
1402#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1403
1404#if EV_MINPRI == EV_MAXPRI
1405# define ABSPRI(w) (((W)w), 0)
341#else 1406#else
342# define inline_speed static inline
343#endif
344
345#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
346#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1407# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1408#endif
347 1409
348#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1410#define EMPTY /* required for microsofts broken pseudo-c compiler */
349#define EMPTY2(a,b) /* used to suppress some warnings */ 1411#define EMPTY2(a,b) /* used to suppress some warnings */
350 1412
351typedef ev_watcher *W; 1413typedef ev_watcher *W;
… …
353typedef ev_watcher_time *WT; 1415typedef ev_watcher_time *WT;
354 1416
355#define ev_active(w) ((W)(w))->active 1417#define ev_active(w) ((W)(w))->active
356#define ev_at(w) ((WT)(w))->at 1418#define ev_at(w) ((WT)(w))->at
357 1419
1420#if EV_USE_REALTIME
1421/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1422/* giving it a reasonably high chance of working on typical architectures */
1423static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1424#endif
1425
358#if EV_USE_MONOTONIC 1426#if EV_USE_MONOTONIC
359/* sig_atomic_t is used to avoid per-thread variables or locking but still */
360/* giving it a reasonably high chance of working on typical architetcures */
361static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1427static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1428#endif
1429
1430#ifndef EV_FD_TO_WIN32_HANDLE
1431# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1432#endif
1433#ifndef EV_WIN32_HANDLE_TO_FD
1434# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1435#endif
1436#ifndef EV_WIN32_CLOSE_FD
1437# define EV_WIN32_CLOSE_FD(fd) close (fd)
362#endif 1438#endif
363 1439
364#ifdef _WIN32 1440#ifdef _WIN32
365# include "ev_win32.c" 1441# include "ev_win32.c"
366#endif 1442#endif
367 1443
368/*****************************************************************************/ 1444/*****************************************************************************/
369 1445
1446/* define a suitable floor function (only used by periodics atm) */
1447
1448#if EV_USE_FLOOR
1449# include <math.h>
1450# define ev_floor(v) floor (v)
1451#else
1452
1453#include <float.h>
1454
1455/* a floor() replacement function, should be independent of ev_tstamp type */
1456static ev_tstamp noinline
1457ev_floor (ev_tstamp v)
1458{
1459 /* the choice of shift factor is not terribly important */
1460#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1461 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1462#else
1463 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1464#endif
1465
1466 /* argument too large for an unsigned long? */
1467 if (expect_false (v >= shift))
1468 {
1469 ev_tstamp f;
1470
1471 if (v == v - 1.)
1472 return v; /* very large number */
1473
1474 f = shift * ev_floor (v * (1. / shift));
1475 return f + ev_floor (v - f);
1476 }
1477
1478 /* special treatment for negative args? */
1479 if (expect_false (v < 0.))
1480 {
1481 ev_tstamp f = -ev_floor (-v);
1482
1483 return f - (f == v ? 0 : 1);
1484 }
1485
1486 /* fits into an unsigned long */
1487 return (unsigned long)v;
1488}
1489
1490#endif
1491
1492/*****************************************************************************/
1493
1494#ifdef __linux
1495# include <sys/utsname.h>
1496#endif
1497
1498static unsigned int noinline ecb_cold
1499ev_linux_version (void)
1500{
1501#ifdef __linux
1502 unsigned int v = 0;
1503 struct utsname buf;
1504 int i;
1505 char *p = buf.release;
1506
1507 if (uname (&buf))
1508 return 0;
1509
1510 for (i = 3+1; --i; )
1511 {
1512 unsigned int c = 0;
1513
1514 for (;;)
1515 {
1516 if (*p >= '0' && *p <= '9')
1517 c = c * 10 + *p++ - '0';
1518 else
1519 {
1520 p += *p == '.';
1521 break;
1522 }
1523 }
1524
1525 v = (v << 8) | c;
1526 }
1527
1528 return v;
1529#else
1530 return 0;
1531#endif
1532}
1533
1534/*****************************************************************************/
1535
1536#if EV_AVOID_STDIO
1537static void noinline ecb_cold
1538ev_printerr (const char *msg)
1539{
1540 write (STDERR_FILENO, msg, strlen (msg));
1541}
1542#endif
1543
370static void (*syserr_cb)(const char *msg); 1544static void (*syserr_cb)(const char *msg) EV_THROW;
371 1545
372void 1546void ecb_cold
373ev_set_syserr_cb (void (*cb)(const char *msg)) 1547ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
374{ 1548{
375 syserr_cb = cb; 1549 syserr_cb = cb;
376} 1550}
377 1551
378static void noinline 1552static void noinline ecb_cold
379syserr (const char *msg) 1553ev_syserr (const char *msg)
380{ 1554{
381 if (!msg) 1555 if (!msg)
382 msg = "(libev) system error"; 1556 msg = "(libev) system error";
383 1557
384 if (syserr_cb) 1558 if (syserr_cb)
385 syserr_cb (msg); 1559 syserr_cb (msg);
386 else 1560 else
387 { 1561 {
1562#if EV_AVOID_STDIO
1563 ev_printerr (msg);
1564 ev_printerr (": ");
1565 ev_printerr (strerror (errno));
1566 ev_printerr ("\n");
1567#else
388 perror (msg); 1568 perror (msg);
1569#endif
389 abort (); 1570 abort ();
390 } 1571 }
391} 1572}
392 1573
393static void * 1574static void *
394ev_realloc_emul (void *ptr, long size) 1575ev_realloc_emul (void *ptr, long size) EV_THROW
395{ 1576{
396 /* some systems, notably openbsd and darwin, fail to properly 1577 /* some systems, notably openbsd and darwin, fail to properly
397 * implement realloc (x, 0) (as required by both ansi c-98 and 1578 * implement realloc (x, 0) (as required by both ansi c-89 and
398 * the single unix specification, so work around them here. 1579 * the single unix specification, so work around them here.
1580 * recently, also (at least) fedora and debian started breaking it,
1581 * despite documenting it otherwise.
399 */ 1582 */
400 1583
401 if (size) 1584 if (size)
402 return realloc (ptr, size); 1585 return realloc (ptr, size);
403 1586
404 free (ptr); 1587 free (ptr);
405 return 0; 1588 return 0;
406} 1589}
407 1590
408static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1591static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
409 1592
410void 1593void ecb_cold
411ev_set_allocator (void *(*cb)(void *ptr, long size)) 1594ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
412{ 1595{
413 alloc = cb; 1596 alloc = cb;
414} 1597}
415 1598
416inline_speed void * 1599inline_speed void *
… …
418{ 1601{
419 ptr = alloc (ptr, size); 1602 ptr = alloc (ptr, size);
420 1603
421 if (!ptr && size) 1604 if (!ptr && size)
422 { 1605 {
1606#if EV_AVOID_STDIO
1607 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1608#else
423 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1609 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1610#endif
424 abort (); 1611 abort ();
425 } 1612 }
426 1613
427 return ptr; 1614 return ptr;
428} 1615}
… …
430#define ev_malloc(size) ev_realloc (0, (size)) 1617#define ev_malloc(size) ev_realloc (0, (size))
431#define ev_free(ptr) ev_realloc ((ptr), 0) 1618#define ev_free(ptr) ev_realloc ((ptr), 0)
432 1619
433/*****************************************************************************/ 1620/*****************************************************************************/
434 1621
1622/* set in reify when reification needed */
1623#define EV_ANFD_REIFY 1
1624
1625/* file descriptor info structure */
435typedef struct 1626typedef struct
436{ 1627{
437 WL head; 1628 WL head;
438 unsigned char events; 1629 unsigned char events; /* the events watched for */
1630 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1631 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
439 unsigned char reify; 1632 unsigned char unused;
1633#if EV_USE_EPOLL
1634 unsigned int egen; /* generation counter to counter epoll bugs */
1635#endif
440#if EV_SELECT_IS_WINSOCKET 1636#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
441 SOCKET handle; 1637 SOCKET handle;
442#endif 1638#endif
1639#if EV_USE_IOCP
1640 OVERLAPPED or, ow;
1641#endif
443} ANFD; 1642} ANFD;
444 1643
1644/* stores the pending event set for a given watcher */
445typedef struct 1645typedef struct
446{ 1646{
447 W w; 1647 W w;
448 int events; 1648 int events; /* the pending event set for the given watcher */
449} ANPENDING; 1649} ANPENDING;
450 1650
451#if EV_USE_INOTIFY 1651#if EV_USE_INOTIFY
452/* hash table entry per inotify-id */ 1652/* hash table entry per inotify-id */
453typedef struct 1653typedef struct
… …
456} ANFS; 1656} ANFS;
457#endif 1657#endif
458 1658
459/* Heap Entry */ 1659/* Heap Entry */
460#if EV_HEAP_CACHE_AT 1660#if EV_HEAP_CACHE_AT
1661 /* a heap element */
461 typedef struct { 1662 typedef struct {
462 ev_tstamp at; 1663 ev_tstamp at;
463 WT w; 1664 WT w;
464 } ANHE; 1665 } ANHE;
465 1666
466 #define ANHE_w(he) (he).w /* access watcher, read-write */ 1667 #define ANHE_w(he) (he).w /* access watcher, read-write */
467 #define ANHE_at(he) (he).at /* access cached at, read-only */ 1668 #define ANHE_at(he) (he).at /* access cached at, read-only */
468 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 1669 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
469#else 1670#else
1671 /* a heap element */
470 typedef WT ANHE; 1672 typedef WT ANHE;
471 1673
472 #define ANHE_w(he) (he) 1674 #define ANHE_w(he) (he)
473 #define ANHE_at(he) (he)->at 1675 #define ANHE_at(he) (he)->at
474 #define ANHE_at_cache(he) 1676 #define ANHE_at_cache(he)
… …
485 #undef VAR 1687 #undef VAR
486 }; 1688 };
487 #include "ev_wrap.h" 1689 #include "ev_wrap.h"
488 1690
489 static struct ev_loop default_loop_struct; 1691 static struct ev_loop default_loop_struct;
490 struct ev_loop *ev_default_loop_ptr; 1692 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
491 1693
492#else 1694#else
493 1695
494 ev_tstamp ev_rt_now; 1696 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
495 #define VAR(name,decl) static decl; 1697 #define VAR(name,decl) static decl;
496 #include "ev_vars.h" 1698 #include "ev_vars.h"
497 #undef VAR 1699 #undef VAR
498 1700
499 static int ev_default_loop_ptr; 1701 static int ev_default_loop_ptr;
500 1702
501#endif 1703#endif
502 1704
1705#if EV_FEATURE_API
1706# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1707# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1708# define EV_INVOKE_PENDING invoke_cb (EV_A)
1709#else
1710# define EV_RELEASE_CB (void)0
1711# define EV_ACQUIRE_CB (void)0
1712# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1713#endif
1714
1715#define EVBREAK_RECURSE 0x80
1716
503/*****************************************************************************/ 1717/*****************************************************************************/
504 1718
1719#ifndef EV_HAVE_EV_TIME
505ev_tstamp 1720ev_tstamp
506ev_time (void) 1721ev_time (void) EV_THROW
507{ 1722{
508#if EV_USE_REALTIME 1723#if EV_USE_REALTIME
1724 if (expect_true (have_realtime))
1725 {
509 struct timespec ts; 1726 struct timespec ts;
510 clock_gettime (CLOCK_REALTIME, &ts); 1727 clock_gettime (CLOCK_REALTIME, &ts);
511 return ts.tv_sec + ts.tv_nsec * 1e-9; 1728 return ts.tv_sec + ts.tv_nsec * 1e-9;
512#else 1729 }
1730#endif
1731
513 struct timeval tv; 1732 struct timeval tv;
514 gettimeofday (&tv, 0); 1733 gettimeofday (&tv, 0);
515 return tv.tv_sec + tv.tv_usec * 1e-6; 1734 return tv.tv_sec + tv.tv_usec * 1e-6;
516#endif
517} 1735}
1736#endif
518 1737
519ev_tstamp inline_size 1738inline_size ev_tstamp
520get_clock (void) 1739get_clock (void)
521{ 1740{
522#if EV_USE_MONOTONIC 1741#if EV_USE_MONOTONIC
523 if (expect_true (have_monotonic)) 1742 if (expect_true (have_monotonic))
524 { 1743 {
… …
531 return ev_time (); 1750 return ev_time ();
532} 1751}
533 1752
534#if EV_MULTIPLICITY 1753#if EV_MULTIPLICITY
535ev_tstamp 1754ev_tstamp
536ev_now (EV_P) 1755ev_now (EV_P) EV_THROW
537{ 1756{
538 return ev_rt_now; 1757 return ev_rt_now;
539} 1758}
540#endif 1759#endif
541 1760
542void 1761void
543ev_sleep (ev_tstamp delay) 1762ev_sleep (ev_tstamp delay) EV_THROW
544{ 1763{
545 if (delay > 0.) 1764 if (delay > 0.)
546 { 1765 {
547#if EV_USE_NANOSLEEP 1766#if EV_USE_NANOSLEEP
548 struct timespec ts; 1767 struct timespec ts;
549 1768
550 ts.tv_sec = (time_t)delay; 1769 EV_TS_SET (ts, delay);
551 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
552
553 nanosleep (&ts, 0); 1770 nanosleep (&ts, 0);
554#elif defined(_WIN32) 1771#elif defined _WIN32
555 Sleep ((unsigned long)(delay * 1e3)); 1772 Sleep ((unsigned long)(delay * 1e3));
556#else 1773#else
557 struct timeval tv; 1774 struct timeval tv;
558 1775
559 tv.tv_sec = (time_t)delay; 1776 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
560 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1777 /* something not guaranteed by newer posix versions, but guaranteed */
561 1778 /* by older ones */
1779 EV_TV_SET (tv, delay);
562 select (0, 0, 0, 0, &tv); 1780 select (0, 0, 0, 0, &tv);
563#endif 1781#endif
564 } 1782 }
565} 1783}
566 1784
567/*****************************************************************************/ 1785/*****************************************************************************/
568 1786
569#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1787#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
570 1788
571int inline_size 1789/* find a suitable new size for the given array, */
1790/* hopefully by rounding to a nice-to-malloc size */
1791inline_size int
572array_nextsize (int elem, int cur, int cnt) 1792array_nextsize (int elem, int cur, int cnt)
573{ 1793{
574 int ncur = cur + 1; 1794 int ncur = cur + 1;
575 1795
576 do 1796 do
577 ncur <<= 1; 1797 ncur <<= 1;
578 while (cnt > ncur); 1798 while (cnt > ncur);
579 1799
580 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1800 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
581 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1801 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
582 { 1802 {
583 ncur *= elem; 1803 ncur *= elem;
584 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1804 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
585 ncur = ncur - sizeof (void *) * 4; 1805 ncur = ncur - sizeof (void *) * 4;
… …
587 } 1807 }
588 1808
589 return ncur; 1809 return ncur;
590} 1810}
591 1811
592static noinline void * 1812static void * noinline ecb_cold
593array_realloc (int elem, void *base, int *cur, int cnt) 1813array_realloc (int elem, void *base, int *cur, int cnt)
594{ 1814{
595 *cur = array_nextsize (elem, *cur, cnt); 1815 *cur = array_nextsize (elem, *cur, cnt);
596 return ev_realloc (base, elem * *cur); 1816 return ev_realloc (base, elem * *cur);
597} 1817}
1818
1819#define array_init_zero(base,count) \
1820 memset ((void *)(base), 0, sizeof (*(base)) * (count))
598 1821
599#define array_needsize(type,base,cur,cnt,init) \ 1822#define array_needsize(type,base,cur,cnt,init) \
600 if (expect_false ((cnt) > (cur))) \ 1823 if (expect_false ((cnt) > (cur))) \
601 { \ 1824 { \
602 int ocur_ = (cur); \ 1825 int ecb_unused ocur_ = (cur); \
603 (base) = (type *)array_realloc \ 1826 (base) = (type *)array_realloc \
604 (sizeof (type), (base), &(cur), (cnt)); \ 1827 (sizeof (type), (base), &(cur), (cnt)); \
605 init ((base) + (ocur_), (cur) - ocur_); \ 1828 init ((base) + (ocur_), (cur) - ocur_); \
606 } 1829 }
607 1830
… …
614 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1837 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
615 } 1838 }
616#endif 1839#endif
617 1840
618#define array_free(stem, idx) \ 1841#define array_free(stem, idx) \
619 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1842 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
620 1843
621/*****************************************************************************/ 1844/*****************************************************************************/
622 1845
1846/* dummy callback for pending events */
1847static void noinline
1848pendingcb (EV_P_ ev_prepare *w, int revents)
1849{
1850}
1851
623void noinline 1852void noinline
624ev_feed_event (EV_P_ void *w, int revents) 1853ev_feed_event (EV_P_ void *w, int revents) EV_THROW
625{ 1854{
626 W w_ = (W)w; 1855 W w_ = (W)w;
627 int pri = ABSPRI (w_); 1856 int pri = ABSPRI (w_);
628 1857
629 if (expect_false (w_->pending)) 1858 if (expect_false (w_->pending))
… …
633 w_->pending = ++pendingcnt [pri]; 1862 w_->pending = ++pendingcnt [pri];
634 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1863 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
635 pendings [pri][w_->pending - 1].w = w_; 1864 pendings [pri][w_->pending - 1].w = w_;
636 pendings [pri][w_->pending - 1].events = revents; 1865 pendings [pri][w_->pending - 1].events = revents;
637 } 1866 }
638}
639 1867
640void inline_speed 1868 pendingpri = NUMPRI - 1;
1869}
1870
1871inline_speed void
1872feed_reverse (EV_P_ W w)
1873{
1874 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1875 rfeeds [rfeedcnt++] = w;
1876}
1877
1878inline_size void
1879feed_reverse_done (EV_P_ int revents)
1880{
1881 do
1882 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1883 while (rfeedcnt);
1884}
1885
1886inline_speed void
641queue_events (EV_P_ W *events, int eventcnt, int type) 1887queue_events (EV_P_ W *events, int eventcnt, int type)
642{ 1888{
643 int i; 1889 int i;
644 1890
645 for (i = 0; i < eventcnt; ++i) 1891 for (i = 0; i < eventcnt; ++i)
646 ev_feed_event (EV_A_ events [i], type); 1892 ev_feed_event (EV_A_ events [i], type);
647} 1893}
648 1894
649/*****************************************************************************/ 1895/*****************************************************************************/
650 1896
651void inline_size 1897inline_speed void
652anfds_init (ANFD *base, int count)
653{
654 while (count--)
655 {
656 base->head = 0;
657 base->events = EV_NONE;
658 base->reify = 0;
659
660 ++base;
661 }
662}
663
664void inline_speed
665fd_event (EV_P_ int fd, int revents) 1898fd_event_nocheck (EV_P_ int fd, int revents)
666{ 1899{
667 ANFD *anfd = anfds + fd; 1900 ANFD *anfd = anfds + fd;
668 ev_io *w; 1901 ev_io *w;
669 1902
670 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1903 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
674 if (ev) 1907 if (ev)
675 ev_feed_event (EV_A_ (W)w, ev); 1908 ev_feed_event (EV_A_ (W)w, ev);
676 } 1909 }
677} 1910}
678 1911
1912/* do not submit kernel events for fds that have reify set */
1913/* because that means they changed while we were polling for new events */
1914inline_speed void
1915fd_event (EV_P_ int fd, int revents)
1916{
1917 ANFD *anfd = anfds + fd;
1918
1919 if (expect_true (!anfd->reify))
1920 fd_event_nocheck (EV_A_ fd, revents);
1921}
1922
679void 1923void
680ev_feed_fd_event (EV_P_ int fd, int revents) 1924ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
681{ 1925{
682 if (fd >= 0 && fd < anfdmax) 1926 if (fd >= 0 && fd < anfdmax)
683 fd_event (EV_A_ fd, revents); 1927 fd_event_nocheck (EV_A_ fd, revents);
684} 1928}
685 1929
686void inline_size 1930/* make sure the external fd watch events are in-sync */
1931/* with the kernel/libev internal state */
1932inline_size void
687fd_reify (EV_P) 1933fd_reify (EV_P)
688{ 1934{
689 int i; 1935 int i;
1936
1937#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1938 for (i = 0; i < fdchangecnt; ++i)
1939 {
1940 int fd = fdchanges [i];
1941 ANFD *anfd = anfds + fd;
1942
1943 if (anfd->reify & EV__IOFDSET && anfd->head)
1944 {
1945 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1946
1947 if (handle != anfd->handle)
1948 {
1949 unsigned long arg;
1950
1951 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1952
1953 /* handle changed, but fd didn't - we need to do it in two steps */
1954 backend_modify (EV_A_ fd, anfd->events, 0);
1955 anfd->events = 0;
1956 anfd->handle = handle;
1957 }
1958 }
1959 }
1960#endif
690 1961
691 for (i = 0; i < fdchangecnt; ++i) 1962 for (i = 0; i < fdchangecnt; ++i)
692 { 1963 {
693 int fd = fdchanges [i]; 1964 int fd = fdchanges [i];
694 ANFD *anfd = anfds + fd; 1965 ANFD *anfd = anfds + fd;
695 ev_io *w; 1966 ev_io *w;
696 1967
697 unsigned char events = 0; 1968 unsigned char o_events = anfd->events;
1969 unsigned char o_reify = anfd->reify;
698 1970
699 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1971 anfd->reify = 0;
700 events |= (unsigned char)w->events;
701 1972
702#if EV_SELECT_IS_WINSOCKET 1973 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
703 if (events)
704 { 1974 {
705 unsigned long argp; 1975 anfd->events = 0;
706 #ifdef EV_FD_TO_WIN32_HANDLE 1976
707 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1977 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
708 #else 1978 anfd->events |= (unsigned char)w->events;
709 anfd->handle = _get_osfhandle (fd); 1979
710 #endif 1980 if (o_events != anfd->events)
711 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1981 o_reify = EV__IOFDSET; /* actually |= */
712 } 1982 }
713#endif
714 1983
715 { 1984 if (o_reify & EV__IOFDSET)
716 unsigned char o_events = anfd->events;
717 unsigned char o_reify = anfd->reify;
718
719 anfd->reify = 0;
720 anfd->events = events;
721
722 if (o_events != events || o_reify & EV_IOFDSET)
723 backend_modify (EV_A_ fd, o_events, events); 1985 backend_modify (EV_A_ fd, o_events, anfd->events);
724 }
725 } 1986 }
726 1987
727 fdchangecnt = 0; 1988 fdchangecnt = 0;
728} 1989}
729 1990
730void inline_size 1991/* something about the given fd changed */
1992inline_size void
731fd_change (EV_P_ int fd, int flags) 1993fd_change (EV_P_ int fd, int flags)
732{ 1994{
733 unsigned char reify = anfds [fd].reify; 1995 unsigned char reify = anfds [fd].reify;
734 anfds [fd].reify |= flags; 1996 anfds [fd].reify |= flags;
735 1997
… …
739 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2001 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
740 fdchanges [fdchangecnt - 1] = fd; 2002 fdchanges [fdchangecnt - 1] = fd;
741 } 2003 }
742} 2004}
743 2005
744void inline_speed 2006/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2007inline_speed void ecb_cold
745fd_kill (EV_P_ int fd) 2008fd_kill (EV_P_ int fd)
746{ 2009{
747 ev_io *w; 2010 ev_io *w;
748 2011
749 while ((w = (ev_io *)anfds [fd].head)) 2012 while ((w = (ev_io *)anfds [fd].head))
… …
751 ev_io_stop (EV_A_ w); 2014 ev_io_stop (EV_A_ w);
752 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2015 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
753 } 2016 }
754} 2017}
755 2018
756int inline_size 2019/* check whether the given fd is actually valid, for error recovery */
2020inline_size int ecb_cold
757fd_valid (int fd) 2021fd_valid (int fd)
758{ 2022{
759#ifdef _WIN32 2023#ifdef _WIN32
760 return _get_osfhandle (fd) != -1; 2024 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
761#else 2025#else
762 return fcntl (fd, F_GETFD) != -1; 2026 return fcntl (fd, F_GETFD) != -1;
763#endif 2027#endif
764} 2028}
765 2029
766/* called on EBADF to verify fds */ 2030/* called on EBADF to verify fds */
767static void noinline 2031static void noinline ecb_cold
768fd_ebadf (EV_P) 2032fd_ebadf (EV_P)
769{ 2033{
770 int fd; 2034 int fd;
771 2035
772 for (fd = 0; fd < anfdmax; ++fd) 2036 for (fd = 0; fd < anfdmax; ++fd)
773 if (anfds [fd].events) 2037 if (anfds [fd].events)
774 if (!fd_valid (fd) == -1 && errno == EBADF) 2038 if (!fd_valid (fd) && errno == EBADF)
775 fd_kill (EV_A_ fd); 2039 fd_kill (EV_A_ fd);
776} 2040}
777 2041
778/* called on ENOMEM in select/poll to kill some fds and retry */ 2042/* called on ENOMEM in select/poll to kill some fds and retry */
779static void noinline 2043static void noinline ecb_cold
780fd_enomem (EV_P) 2044fd_enomem (EV_P)
781{ 2045{
782 int fd; 2046 int fd;
783 2047
784 for (fd = anfdmax; fd--; ) 2048 for (fd = anfdmax; fd--; )
785 if (anfds [fd].events) 2049 if (anfds [fd].events)
786 { 2050 {
787 fd_kill (EV_A_ fd); 2051 fd_kill (EV_A_ fd);
788 return; 2052 break;
789 } 2053 }
790} 2054}
791 2055
792/* usually called after fork if backend needs to re-arm all fds from scratch */ 2056/* usually called after fork if backend needs to re-arm all fds from scratch */
793static void noinline 2057static void noinline
… …
797 2061
798 for (fd = 0; fd < anfdmax; ++fd) 2062 for (fd = 0; fd < anfdmax; ++fd)
799 if (anfds [fd].events) 2063 if (anfds [fd].events)
800 { 2064 {
801 anfds [fd].events = 0; 2065 anfds [fd].events = 0;
2066 anfds [fd].emask = 0;
802 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2067 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
803 } 2068 }
804} 2069}
805 2070
2071/* used to prepare libev internal fd's */
2072/* this is not fork-safe */
2073inline_speed void
2074fd_intern (int fd)
2075{
2076#ifdef _WIN32
2077 unsigned long arg = 1;
2078 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2079#else
2080 fcntl (fd, F_SETFD, FD_CLOEXEC);
2081 fcntl (fd, F_SETFL, O_NONBLOCK);
2082#endif
2083}
2084
806/*****************************************************************************/ 2085/*****************************************************************************/
807 2086
808/* 2087/*
809 * the heap functions want a real array index. array index 0 uis guaranteed to not 2088 * the heap functions want a real array index. array index 0 is guaranteed to not
810 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2089 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
811 * the branching factor of the d-tree. 2090 * the branching factor of the d-tree.
812 */ 2091 */
813 2092
814/* 2093/*
… …
823#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 2102#define HEAP0 (DHEAP - 1) /* index of first element in heap */
824#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 2103#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
825#define UPHEAP_DONE(p,k) ((p) == (k)) 2104#define UPHEAP_DONE(p,k) ((p) == (k))
826 2105
827/* away from the root */ 2106/* away from the root */
828void inline_speed 2107inline_speed void
829downheap (ANHE *heap, int N, int k) 2108downheap (ANHE *heap, int N, int k)
830{ 2109{
831 ANHE he = heap [k]; 2110 ANHE he = heap [k];
832 ANHE *E = heap + N + HEAP0; 2111 ANHE *E = heap + N + HEAP0;
833 2112
… …
873#define HEAP0 1 2152#define HEAP0 1
874#define HPARENT(k) ((k) >> 1) 2153#define HPARENT(k) ((k) >> 1)
875#define UPHEAP_DONE(p,k) (!(p)) 2154#define UPHEAP_DONE(p,k) (!(p))
876 2155
877/* away from the root */ 2156/* away from the root */
878void inline_speed 2157inline_speed void
879downheap (ANHE *heap, int N, int k) 2158downheap (ANHE *heap, int N, int k)
880{ 2159{
881 ANHE he = heap [k]; 2160 ANHE he = heap [k];
882 2161
883 for (;;) 2162 for (;;)
884 { 2163 {
885 int c = k << 1; 2164 int c = k << 1;
886 2165
887 if (c > N + HEAP0 - 1) 2166 if (c >= N + HEAP0)
888 break; 2167 break;
889 2168
890 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2169 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
891 ? 1 : 0; 2170 ? 1 : 0;
892 2171
… …
903 ev_active (ANHE_w (he)) = k; 2182 ev_active (ANHE_w (he)) = k;
904} 2183}
905#endif 2184#endif
906 2185
907/* towards the root */ 2186/* towards the root */
908void inline_speed 2187inline_speed void
909upheap (ANHE *heap, int k) 2188upheap (ANHE *heap, int k)
910{ 2189{
911 ANHE he = heap [k]; 2190 ANHE he = heap [k];
912 2191
913 for (;;) 2192 for (;;)
… …
924 2203
925 heap [k] = he; 2204 heap [k] = he;
926 ev_active (ANHE_w (he)) = k; 2205 ev_active (ANHE_w (he)) = k;
927} 2206}
928 2207
929void inline_size 2208/* move an element suitably so it is in a correct place */
2209inline_size void
930adjustheap (ANHE *heap, int N, int k) 2210adjustheap (ANHE *heap, int N, int k)
931{ 2211{
932 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2212 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
933 upheap (heap, k); 2213 upheap (heap, k);
934 else 2214 else
935 downheap (heap, N, k); 2215 downheap (heap, N, k);
936} 2216}
937 2217
938/* rebuild the heap: this function is used only once and executed rarely */ 2218/* rebuild the heap: this function is used only once and executed rarely */
939void inline_size 2219inline_size void
940reheap (ANHE *heap, int N) 2220reheap (ANHE *heap, int N)
941{ 2221{
942 int i; 2222 int i;
2223
943 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 2224 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
944 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ 2225 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
945 for (i = 0; i < N; ++i) 2226 for (i = 0; i < N; ++i)
946 upheap (heap, i + HEAP0); 2227 upheap (heap, i + HEAP0);
947} 2228}
948 2229
949#if EV_VERIFY
950static void
951checkheap (ANHE *heap, int N)
952{
953 int i;
954
955 for (i = HEAP0; i < N + HEAP0; ++i)
956 {
957 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
958 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
959 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
960 }
961}
962#endif
963
964/*****************************************************************************/ 2230/*****************************************************************************/
965 2231
2232/* associate signal watchers to a signal signal */
966typedef struct 2233typedef struct
967{ 2234{
2235 EV_ATOMIC_T pending;
2236#if EV_MULTIPLICITY
2237 EV_P;
2238#endif
968 WL head; 2239 WL head;
969 EV_ATOMIC_T gotsig;
970} ANSIG; 2240} ANSIG;
971 2241
972static ANSIG *signals; 2242static ANSIG signals [EV_NSIG - 1];
973static int signalmax;
974
975static EV_ATOMIC_T gotsig;
976
977void inline_size
978signals_init (ANSIG *base, int count)
979{
980 while (count--)
981 {
982 base->head = 0;
983 base->gotsig = 0;
984
985 ++base;
986 }
987}
988 2243
989/*****************************************************************************/ 2244/*****************************************************************************/
990 2245
991void inline_speed 2246#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
992fd_intern (int fd)
993{
994#ifdef _WIN32
995 int arg = 1;
996 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
997#else
998 fcntl (fd, F_SETFD, FD_CLOEXEC);
999 fcntl (fd, F_SETFL, O_NONBLOCK);
1000#endif
1001}
1002 2247
1003static void noinline 2248static void noinline ecb_cold
1004evpipe_init (EV_P) 2249evpipe_init (EV_P)
1005{ 2250{
1006 if (!ev_is_active (&pipeev)) 2251 if (!ev_is_active (&pipe_w))
2252 {
2253 int fds [2];
2254
2255# if EV_USE_EVENTFD
2256 fds [0] = -1;
2257 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2258 if (fds [1] < 0 && errno == EINVAL)
2259 fds [1] = eventfd (0, 0);
2260
2261 if (fds [1] < 0)
2262# endif
2263 {
2264 while (pipe (fds))
2265 ev_syserr ("(libev) error creating signal/async pipe");
2266
2267 fd_intern (fds [0]);
2268 }
2269
2270 evpipe [0] = fds [0];
2271
2272 if (evpipe [1] < 0)
2273 evpipe [1] = fds [1]; /* first call, set write fd */
2274 else
2275 {
2276 /* on subsequent calls, do not change evpipe [1] */
2277 /* so that evpipe_write can always rely on its value. */
2278 /* this branch does not do anything sensible on windows, */
2279 /* so must not be executed on windows */
2280
2281 dup2 (fds [1], evpipe [1]);
2282 close (fds [1]);
2283 }
2284
2285 fd_intern (evpipe [1]);
2286
2287 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2288 ev_io_start (EV_A_ &pipe_w);
2289 ev_unref (EV_A); /* watcher should not keep loop alive */
1007 { 2290 }
2291}
2292
2293inline_speed void
2294evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2295{
2296 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2297
2298 if (expect_true (*flag))
2299 return;
2300
2301 *flag = 1;
2302 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2303
2304 pipe_write_skipped = 1;
2305
2306 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2307
2308 if (pipe_write_wanted)
2309 {
2310 int old_errno;
2311
2312 pipe_write_skipped = 0;
2313 ECB_MEMORY_FENCE_RELEASE;
2314
2315 old_errno = errno; /* save errno because write will clobber it */
2316
1008#if EV_USE_EVENTFD 2317#if EV_USE_EVENTFD
1009 if ((evfd = eventfd (0, 0)) >= 0) 2318 if (evpipe [0] < 0)
1010 { 2319 {
1011 evpipe [0] = -1; 2320 uint64_t counter = 1;
1012 fd_intern (evfd); 2321 write (evpipe [1], &counter, sizeof (uint64_t));
1013 ev_io_set (&pipeev, evfd, EV_READ);
1014 } 2322 }
1015 else 2323 else
1016#endif 2324#endif
1017 { 2325 {
1018 while (pipe (evpipe)) 2326#ifdef _WIN32
1019 syserr ("(libev) error creating signal/async pipe"); 2327 WSABUF buf;
1020 2328 DWORD sent;
1021 fd_intern (evpipe [0]); 2329 buf.buf = &buf;
1022 fd_intern (evpipe [1]); 2330 buf.len = 1;
1023 ev_io_set (&pipeev, evpipe [0], EV_READ); 2331 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2332#else
2333 write (evpipe [1], &(evpipe [1]), 1);
2334#endif
1024 } 2335 }
1025 2336
1026 ev_io_start (EV_A_ &pipeev); 2337 errno = old_errno;
1027 ev_unref (EV_A); /* watcher should not keep loop alive */
1028 }
1029}
1030
1031void inline_size
1032evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1033{
1034 if (!*flag)
1035 { 2338 }
1036 int old_errno = errno; /* save errno because write might clobber it */ 2339}
1037 2340
1038 *flag = 1; 2341/* called whenever the libev signal pipe */
2342/* got some events (signal, async) */
2343static void
2344pipecb (EV_P_ ev_io *iow, int revents)
2345{
2346 int i;
1039 2347
2348 if (revents & EV_READ)
2349 {
1040#if EV_USE_EVENTFD 2350#if EV_USE_EVENTFD
1041 if (evfd >= 0) 2351 if (evpipe [0] < 0)
1042 { 2352 {
1043 uint64_t counter = 1; 2353 uint64_t counter;
1044 write (evfd, &counter, sizeof (uint64_t)); 2354 read (evpipe [1], &counter, sizeof (uint64_t));
1045 } 2355 }
1046 else 2356 else
1047#endif 2357#endif
1048 write (evpipe [1], &old_errno, 1); 2358 {
1049
1050 errno = old_errno;
1051 }
1052}
1053
1054static void
1055pipecb (EV_P_ ev_io *iow, int revents)
1056{
1057#if EV_USE_EVENTFD
1058 if (evfd >= 0)
1059 {
1060 uint64_t counter;
1061 read (evfd, &counter, sizeof (uint64_t));
1062 }
1063 else
1064#endif
1065 {
1066 char dummy; 2359 char dummy[4];
2360#ifdef _WIN32
2361 WSABUF buf;
2362 DWORD recvd;
2363 DWORD flags = 0;
2364 buf.buf = dummy;
2365 buf.len = sizeof (dummy);
2366 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2367#else
1067 read (evpipe [0], &dummy, 1); 2368 read (evpipe [0], &dummy, sizeof (dummy));
2369#endif
2370 }
2371 }
2372
2373 pipe_write_skipped = 0;
2374
2375 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2376
2377#if EV_SIGNAL_ENABLE
2378 if (sig_pending)
1068 } 2379 {
2380 sig_pending = 0;
1069 2381
1070 if (gotsig && ev_is_default_loop (EV_A)) 2382 ECB_MEMORY_FENCE;
1071 {
1072 int signum;
1073 gotsig = 0;
1074 2383
1075 for (signum = signalmax; signum--; ) 2384 for (i = EV_NSIG - 1; i--; )
1076 if (signals [signum].gotsig) 2385 if (expect_false (signals [i].pending))
1077 ev_feed_signal_event (EV_A_ signum + 1); 2386 ev_feed_signal_event (EV_A_ i + 1);
1078 } 2387 }
2388#endif
1079 2389
1080#if EV_ASYNC_ENABLE 2390#if EV_ASYNC_ENABLE
1081 if (gotasync) 2391 if (async_pending)
1082 { 2392 {
1083 int i; 2393 async_pending = 0;
1084 gotasync = 0; 2394
2395 ECB_MEMORY_FENCE;
1085 2396
1086 for (i = asynccnt; i--; ) 2397 for (i = asynccnt; i--; )
1087 if (asyncs [i]->sent) 2398 if (asyncs [i]->sent)
1088 { 2399 {
1089 asyncs [i]->sent = 0; 2400 asyncs [i]->sent = 0;
2401 ECB_MEMORY_FENCE_RELEASE;
1090 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2402 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1091 } 2403 }
1092 } 2404 }
1093#endif 2405#endif
1094} 2406}
1095 2407
1096/*****************************************************************************/ 2408/*****************************************************************************/
1097 2409
2410void
2411ev_feed_signal (int signum) EV_THROW
2412{
2413#if EV_MULTIPLICITY
2414 EV_P;
2415 ECB_MEMORY_FENCE_ACQUIRE;
2416 EV_A = signals [signum - 1].loop;
2417
2418 if (!EV_A)
2419 return;
2420#endif
2421
2422 signals [signum - 1].pending = 1;
2423 evpipe_write (EV_A_ &sig_pending);
2424}
2425
1098static void 2426static void
1099ev_sighandler (int signum) 2427ev_sighandler (int signum)
1100{ 2428{
2429#ifdef _WIN32
2430 signal (signum, ev_sighandler);
2431#endif
2432
2433 ev_feed_signal (signum);
2434}
2435
2436void noinline
2437ev_feed_signal_event (EV_P_ int signum) EV_THROW
2438{
2439 WL w;
2440
2441 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2442 return;
2443
2444 --signum;
2445
1101#if EV_MULTIPLICITY 2446#if EV_MULTIPLICITY
1102 struct ev_loop *loop = &default_loop_struct; 2447 /* it is permissible to try to feed a signal to the wrong loop */
1103#endif 2448 /* or, likely more useful, feeding a signal nobody is waiting for */
1104 2449
1105#if _WIN32 2450 if (expect_false (signals [signum].loop != EV_A))
1106 signal (signum, ev_sighandler);
1107#endif
1108
1109 signals [signum - 1].gotsig = 1;
1110 evpipe_write (EV_A_ &gotsig);
1111}
1112
1113void noinline
1114ev_feed_signal_event (EV_P_ int signum)
1115{
1116 WL w;
1117
1118#if EV_MULTIPLICITY
1119 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1120#endif
1121
1122 --signum;
1123
1124 if (signum < 0 || signum >= signalmax)
1125 return; 2451 return;
2452#endif
1126 2453
1127 signals [signum].gotsig = 0; 2454 signals [signum].pending = 0;
2455 ECB_MEMORY_FENCE_RELEASE;
1128 2456
1129 for (w = signals [signum].head; w; w = w->next) 2457 for (w = signals [signum].head; w; w = w->next)
1130 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2458 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1131} 2459}
1132 2460
2461#if EV_USE_SIGNALFD
2462static void
2463sigfdcb (EV_P_ ev_io *iow, int revents)
2464{
2465 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2466
2467 for (;;)
2468 {
2469 ssize_t res = read (sigfd, si, sizeof (si));
2470
2471 /* not ISO-C, as res might be -1, but works with SuS */
2472 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2473 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2474
2475 if (res < (ssize_t)sizeof (si))
2476 break;
2477 }
2478}
2479#endif
2480
2481#endif
2482
1133/*****************************************************************************/ 2483/*****************************************************************************/
1134 2484
2485#if EV_CHILD_ENABLE
1135static WL childs [EV_PID_HASHSIZE]; 2486static WL childs [EV_PID_HASHSIZE];
1136
1137#ifndef _WIN32
1138 2487
1139static ev_signal childev; 2488static ev_signal childev;
1140 2489
1141#ifndef WIFCONTINUED 2490#ifndef WIFCONTINUED
1142# define WIFCONTINUED(status) 0 2491# define WIFCONTINUED(status) 0
1143#endif 2492#endif
1144 2493
1145void inline_speed 2494/* handle a single child status event */
2495inline_speed void
1146child_reap (EV_P_ int chain, int pid, int status) 2496child_reap (EV_P_ int chain, int pid, int status)
1147{ 2497{
1148 ev_child *w; 2498 ev_child *w;
1149 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2499 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1150 2500
1151 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2501 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1152 { 2502 {
1153 if ((w->pid == pid || !w->pid) 2503 if ((w->pid == pid || !w->pid)
1154 && (!traced || (w->flags & 1))) 2504 && (!traced || (w->flags & 1)))
1155 { 2505 {
1156 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2506 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1163 2513
1164#ifndef WCONTINUED 2514#ifndef WCONTINUED
1165# define WCONTINUED 0 2515# define WCONTINUED 0
1166#endif 2516#endif
1167 2517
2518/* called on sigchld etc., calls waitpid */
1168static void 2519static void
1169childcb (EV_P_ ev_signal *sw, int revents) 2520childcb (EV_P_ ev_signal *sw, int revents)
1170{ 2521{
1171 int pid, status; 2522 int pid, status;
1172 2523
… …
1180 /* make sure we are called again until all children have been reaped */ 2531 /* make sure we are called again until all children have been reaped */
1181 /* we need to do it this way so that the callback gets called before we continue */ 2532 /* we need to do it this way so that the callback gets called before we continue */
1182 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2533 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1183 2534
1184 child_reap (EV_A_ pid, pid, status); 2535 child_reap (EV_A_ pid, pid, status);
1185 if (EV_PID_HASHSIZE > 1) 2536 if ((EV_PID_HASHSIZE) > 1)
1186 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2537 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1187} 2538}
1188 2539
1189#endif 2540#endif
1190 2541
1191/*****************************************************************************/ 2542/*****************************************************************************/
1192 2543
2544#if EV_USE_IOCP
2545# include "ev_iocp.c"
2546#endif
1193#if EV_USE_PORT 2547#if EV_USE_PORT
1194# include "ev_port.c" 2548# include "ev_port.c"
1195#endif 2549#endif
1196#if EV_USE_KQUEUE 2550#if EV_USE_KQUEUE
1197# include "ev_kqueue.c" 2551# include "ev_kqueue.c"
… …
1204#endif 2558#endif
1205#if EV_USE_SELECT 2559#if EV_USE_SELECT
1206# include "ev_select.c" 2560# include "ev_select.c"
1207#endif 2561#endif
1208 2562
1209int 2563int ecb_cold
1210ev_version_major (void) 2564ev_version_major (void) EV_THROW
1211{ 2565{
1212 return EV_VERSION_MAJOR; 2566 return EV_VERSION_MAJOR;
1213} 2567}
1214 2568
1215int 2569int ecb_cold
1216ev_version_minor (void) 2570ev_version_minor (void) EV_THROW
1217{ 2571{
1218 return EV_VERSION_MINOR; 2572 return EV_VERSION_MINOR;
1219} 2573}
1220 2574
1221/* return true if we are running with elevated privileges and should ignore env variables */ 2575/* return true if we are running with elevated privileges and should ignore env variables */
1222int inline_size 2576int inline_size ecb_cold
1223enable_secure (void) 2577enable_secure (void)
1224{ 2578{
1225#ifdef _WIN32 2579#ifdef _WIN32
1226 return 0; 2580 return 0;
1227#else 2581#else
1228 return getuid () != geteuid () 2582 return getuid () != geteuid ()
1229 || getgid () != getegid (); 2583 || getgid () != getegid ();
1230#endif 2584#endif
1231} 2585}
1232 2586
1233unsigned int 2587unsigned int ecb_cold
1234ev_supported_backends (void) 2588ev_supported_backends (void) EV_THROW
1235{ 2589{
1236 unsigned int flags = 0; 2590 unsigned int flags = 0;
1237 2591
1238 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2592 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1239 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2593 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1242 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2596 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1243 2597
1244 return flags; 2598 return flags;
1245} 2599}
1246 2600
1247unsigned int 2601unsigned int ecb_cold
1248ev_recommended_backends (void) 2602ev_recommended_backends (void) EV_THROW
1249{ 2603{
1250 unsigned int flags = ev_supported_backends (); 2604 unsigned int flags = ev_supported_backends ();
1251 2605
1252#ifndef __NetBSD__ 2606#ifndef __NetBSD__
1253 /* kqueue is borked on everything but netbsd apparently */ 2607 /* kqueue is borked on everything but netbsd apparently */
1254 /* it usually doesn't work correctly on anything but sockets and pipes */ 2608 /* it usually doesn't work correctly on anything but sockets and pipes */
1255 flags &= ~EVBACKEND_KQUEUE; 2609 flags &= ~EVBACKEND_KQUEUE;
1256#endif 2610#endif
1257#ifdef __APPLE__ 2611#ifdef __APPLE__
1258 // flags &= ~EVBACKEND_KQUEUE; for documentation 2612 /* only select works correctly on that "unix-certified" platform */
1259 flags &= ~EVBACKEND_POLL; 2613 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2614 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2615#endif
2616#ifdef __FreeBSD__
2617 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1260#endif 2618#endif
1261 2619
1262 return flags; 2620 return flags;
1263} 2621}
1264 2622
2623unsigned int ecb_cold
2624ev_embeddable_backends (void) EV_THROW
2625{
2626 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2627
2628 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2629 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2630 flags &= ~EVBACKEND_EPOLL;
2631
2632 return flags;
2633}
2634
1265unsigned int 2635unsigned int
1266ev_embeddable_backends (void) 2636ev_backend (EV_P) EV_THROW
1267{ 2637{
1268 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2638 return backend;
1269
1270 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1271 /* please fix it and tell me how to detect the fix */
1272 flags &= ~EVBACKEND_EPOLL;
1273
1274 return flags;
1275} 2639}
1276 2640
2641#if EV_FEATURE_API
1277unsigned int 2642unsigned int
1278ev_backend (EV_P) 2643ev_iteration (EV_P) EV_THROW
1279{ 2644{
1280 return backend; 2645 return loop_count;
1281} 2646}
1282 2647
1283unsigned int 2648unsigned int
1284ev_loop_count (EV_P) 2649ev_depth (EV_P) EV_THROW
1285{ 2650{
1286 return loop_count; 2651 return loop_depth;
1287} 2652}
1288 2653
1289void 2654void
1290ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2655ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1291{ 2656{
1292 io_blocktime = interval; 2657 io_blocktime = interval;
1293} 2658}
1294 2659
1295void 2660void
1296ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2661ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1297{ 2662{
1298 timeout_blocktime = interval; 2663 timeout_blocktime = interval;
1299} 2664}
1300 2665
2666void
2667ev_set_userdata (EV_P_ void *data) EV_THROW
2668{
2669 userdata = data;
2670}
2671
2672void *
2673ev_userdata (EV_P) EV_THROW
2674{
2675 return userdata;
2676}
2677
2678void
2679ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2680{
2681 invoke_cb = invoke_pending_cb;
2682}
2683
2684void
2685ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2686{
2687 release_cb = release;
2688 acquire_cb = acquire;
2689}
2690#endif
2691
2692/* initialise a loop structure, must be zero-initialised */
1301static void noinline 2693static void noinline ecb_cold
1302loop_init (EV_P_ unsigned int flags) 2694loop_init (EV_P_ unsigned int flags) EV_THROW
1303{ 2695{
1304 if (!backend) 2696 if (!backend)
1305 { 2697 {
2698 origflags = flags;
2699
2700#if EV_USE_REALTIME
2701 if (!have_realtime)
2702 {
2703 struct timespec ts;
2704
2705 if (!clock_gettime (CLOCK_REALTIME, &ts))
2706 have_realtime = 1;
2707 }
2708#endif
2709
1306#if EV_USE_MONOTONIC 2710#if EV_USE_MONOTONIC
2711 if (!have_monotonic)
1307 { 2712 {
1308 struct timespec ts; 2713 struct timespec ts;
2714
1309 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2715 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1310 have_monotonic = 1; 2716 have_monotonic = 1;
1311 } 2717 }
1312#endif
1313
1314 ev_rt_now = ev_time ();
1315 mn_now = get_clock ();
1316 now_floor = mn_now;
1317 rtmn_diff = ev_rt_now - mn_now;
1318
1319 io_blocktime = 0.;
1320 timeout_blocktime = 0.;
1321 backend = 0;
1322 backend_fd = -1;
1323 gotasync = 0;
1324#if EV_USE_INOTIFY
1325 fs_fd = -2;
1326#endif 2718#endif
1327 2719
1328 /* pid check not overridable via env */ 2720 /* pid check not overridable via env */
1329#ifndef _WIN32 2721#ifndef _WIN32
1330 if (flags & EVFLAG_FORKCHECK) 2722 if (flags & EVFLAG_FORKCHECK)
… …
1334 if (!(flags & EVFLAG_NOENV) 2726 if (!(flags & EVFLAG_NOENV)
1335 && !enable_secure () 2727 && !enable_secure ()
1336 && getenv ("LIBEV_FLAGS")) 2728 && getenv ("LIBEV_FLAGS"))
1337 flags = atoi (getenv ("LIBEV_FLAGS")); 2729 flags = atoi (getenv ("LIBEV_FLAGS"));
1338 2730
1339 if (!(flags & 0x0000ffffU)) 2731 ev_rt_now = ev_time ();
2732 mn_now = get_clock ();
2733 now_floor = mn_now;
2734 rtmn_diff = ev_rt_now - mn_now;
2735#if EV_FEATURE_API
2736 invoke_cb = ev_invoke_pending;
2737#endif
2738
2739 io_blocktime = 0.;
2740 timeout_blocktime = 0.;
2741 backend = 0;
2742 backend_fd = -1;
2743 sig_pending = 0;
2744#if EV_ASYNC_ENABLE
2745 async_pending = 0;
2746#endif
2747 pipe_write_skipped = 0;
2748 pipe_write_wanted = 0;
2749 evpipe [0] = -1;
2750 evpipe [1] = -1;
2751#if EV_USE_INOTIFY
2752 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2753#endif
2754#if EV_USE_SIGNALFD
2755 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2756#endif
2757
2758 if (!(flags & EVBACKEND_MASK))
1340 flags |= ev_recommended_backends (); 2759 flags |= ev_recommended_backends ();
1341 2760
2761#if EV_USE_IOCP
2762 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2763#endif
1342#if EV_USE_PORT 2764#if EV_USE_PORT
1343 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2765 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1344#endif 2766#endif
1345#if EV_USE_KQUEUE 2767#if EV_USE_KQUEUE
1346 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2768 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1353#endif 2775#endif
1354#if EV_USE_SELECT 2776#if EV_USE_SELECT
1355 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2777 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1356#endif 2778#endif
1357 2779
2780 ev_prepare_init (&pending_w, pendingcb);
2781
2782#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1358 ev_init (&pipeev, pipecb); 2783 ev_init (&pipe_w, pipecb);
1359 ev_set_priority (&pipeev, EV_MAXPRI); 2784 ev_set_priority (&pipe_w, EV_MAXPRI);
2785#endif
1360 } 2786 }
1361} 2787}
1362 2788
1363static void noinline 2789/* free up a loop structure */
2790void ecb_cold
1364loop_destroy (EV_P) 2791ev_loop_destroy (EV_P)
1365{ 2792{
1366 int i; 2793 int i;
1367 2794
2795#if EV_MULTIPLICITY
2796 /* mimic free (0) */
2797 if (!EV_A)
2798 return;
2799#endif
2800
2801#if EV_CLEANUP_ENABLE
2802 /* queue cleanup watchers (and execute them) */
2803 if (expect_false (cleanupcnt))
2804 {
2805 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2806 EV_INVOKE_PENDING;
2807 }
2808#endif
2809
2810#if EV_CHILD_ENABLE
2811 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2812 {
2813 ev_ref (EV_A); /* child watcher */
2814 ev_signal_stop (EV_A_ &childev);
2815 }
2816#endif
2817
1368 if (ev_is_active (&pipeev)) 2818 if (ev_is_active (&pipe_w))
1369 { 2819 {
1370 ev_ref (EV_A); /* signal watcher */ 2820 /*ev_ref (EV_A);*/
1371 ev_io_stop (EV_A_ &pipeev); 2821 /*ev_io_stop (EV_A_ &pipe_w);*/
1372 2822
2823 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2824 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2825 }
2826
1373#if EV_USE_EVENTFD 2827#if EV_USE_SIGNALFD
1374 if (evfd >= 0) 2828 if (ev_is_active (&sigfd_w))
1375 close (evfd); 2829 close (sigfd);
1376#endif 2830#endif
1377
1378 if (evpipe [0] >= 0)
1379 {
1380 close (evpipe [0]);
1381 close (evpipe [1]);
1382 }
1383 }
1384 2831
1385#if EV_USE_INOTIFY 2832#if EV_USE_INOTIFY
1386 if (fs_fd >= 0) 2833 if (fs_fd >= 0)
1387 close (fs_fd); 2834 close (fs_fd);
1388#endif 2835#endif
1389 2836
1390 if (backend_fd >= 0) 2837 if (backend_fd >= 0)
1391 close (backend_fd); 2838 close (backend_fd);
1392 2839
2840#if EV_USE_IOCP
2841 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2842#endif
1393#if EV_USE_PORT 2843#if EV_USE_PORT
1394 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2844 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1395#endif 2845#endif
1396#if EV_USE_KQUEUE 2846#if EV_USE_KQUEUE
1397 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2847 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1412#if EV_IDLE_ENABLE 2862#if EV_IDLE_ENABLE
1413 array_free (idle, [i]); 2863 array_free (idle, [i]);
1414#endif 2864#endif
1415 } 2865 }
1416 2866
1417 ev_free (anfds); anfdmax = 0; 2867 ev_free (anfds); anfds = 0; anfdmax = 0;
1418 2868
1419 /* have to use the microsoft-never-gets-it-right macro */ 2869 /* have to use the microsoft-never-gets-it-right macro */
2870 array_free (rfeed, EMPTY);
1420 array_free (fdchange, EMPTY); 2871 array_free (fdchange, EMPTY);
1421 array_free (timer, EMPTY); 2872 array_free (timer, EMPTY);
1422#if EV_PERIODIC_ENABLE 2873#if EV_PERIODIC_ENABLE
1423 array_free (periodic, EMPTY); 2874 array_free (periodic, EMPTY);
1424#endif 2875#endif
1425#if EV_FORK_ENABLE 2876#if EV_FORK_ENABLE
1426 array_free (fork, EMPTY); 2877 array_free (fork, EMPTY);
1427#endif 2878#endif
2879#if EV_CLEANUP_ENABLE
2880 array_free (cleanup, EMPTY);
2881#endif
1428 array_free (prepare, EMPTY); 2882 array_free (prepare, EMPTY);
1429 array_free (check, EMPTY); 2883 array_free (check, EMPTY);
1430#if EV_ASYNC_ENABLE 2884#if EV_ASYNC_ENABLE
1431 array_free (async, EMPTY); 2885 array_free (async, EMPTY);
1432#endif 2886#endif
1433 2887
1434 backend = 0; 2888 backend = 0;
2889
2890#if EV_MULTIPLICITY
2891 if (ev_is_default_loop (EV_A))
2892#endif
2893 ev_default_loop_ptr = 0;
2894#if EV_MULTIPLICITY
2895 else
2896 ev_free (EV_A);
2897#endif
1435} 2898}
1436 2899
1437#if EV_USE_INOTIFY 2900#if EV_USE_INOTIFY
1438void inline_size infy_fork (EV_P); 2901inline_size void infy_fork (EV_P);
1439#endif 2902#endif
1440 2903
1441void inline_size 2904inline_size void
1442loop_fork (EV_P) 2905loop_fork (EV_P)
1443{ 2906{
1444#if EV_USE_PORT 2907#if EV_USE_PORT
1445 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2908 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1446#endif 2909#endif
… …
1452#endif 2915#endif
1453#if EV_USE_INOTIFY 2916#if EV_USE_INOTIFY
1454 infy_fork (EV_A); 2917 infy_fork (EV_A);
1455#endif 2918#endif
1456 2919
2920#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1457 if (ev_is_active (&pipeev)) 2921 if (ev_is_active (&pipe_w))
2922 {
2923 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2924
2925 ev_ref (EV_A);
2926 ev_io_stop (EV_A_ &pipe_w);
2927
2928 if (evpipe [0] >= 0)
2929 EV_WIN32_CLOSE_FD (evpipe [0]);
2930
2931 evpipe_init (EV_A);
2932 /* iterate over everything, in case we missed something before */
2933 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1458 { 2934 }
1459 /* this "locks" the handlers against writing to the pipe */ 2935#endif
1460 /* while we modify the fd vars */ 2936
1461 gotsig = 1; 2937 postfork = 0;
2938}
2939
2940#if EV_MULTIPLICITY
2941
2942struct ev_loop * ecb_cold
2943ev_loop_new (unsigned int flags) EV_THROW
2944{
2945 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2946
2947 memset (EV_A, 0, sizeof (struct ev_loop));
2948 loop_init (EV_A_ flags);
2949
2950 if (ev_backend (EV_A))
2951 return EV_A;
2952
2953 ev_free (EV_A);
2954 return 0;
2955}
2956
2957#endif /* multiplicity */
2958
2959#if EV_VERIFY
2960static void noinline ecb_cold
2961verify_watcher (EV_P_ W w)
2962{
2963 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2964
2965 if (w->pending)
2966 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2967}
2968
2969static void noinline ecb_cold
2970verify_heap (EV_P_ ANHE *heap, int N)
2971{
2972 int i;
2973
2974 for (i = HEAP0; i < N + HEAP0; ++i)
2975 {
2976 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2977 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2978 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2979
2980 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2981 }
2982}
2983
2984static void noinline ecb_cold
2985array_verify (EV_P_ W *ws, int cnt)
2986{
2987 while (cnt--)
2988 {
2989 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2990 verify_watcher (EV_A_ ws [cnt]);
2991 }
2992}
2993#endif
2994
2995#if EV_FEATURE_API
2996void ecb_cold
2997ev_verify (EV_P) EV_THROW
2998{
2999#if EV_VERIFY
3000 int i;
3001 WL w, w2;
3002
3003 assert (activecnt >= -1);
3004
3005 assert (fdchangemax >= fdchangecnt);
3006 for (i = 0; i < fdchangecnt; ++i)
3007 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3008
3009 assert (anfdmax >= 0);
3010 for (i = 0; i < anfdmax; ++i)
3011 {
3012 int j = 0;
3013
3014 for (w = w2 = anfds [i].head; w; w = w->next)
3015 {
3016 verify_watcher (EV_A_ (W)w);
3017
3018 if (j++ & 1)
3019 {
3020 assert (("libev: io watcher list contains a loop", w != w2));
3021 w2 = w2->next;
3022 }
3023
3024 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3025 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3026 }
3027 }
3028
3029 assert (timermax >= timercnt);
3030 verify_heap (EV_A_ timers, timercnt);
3031
3032#if EV_PERIODIC_ENABLE
3033 assert (periodicmax >= periodiccnt);
3034 verify_heap (EV_A_ periodics, periodiccnt);
3035#endif
3036
3037 for (i = NUMPRI; i--; )
3038 {
3039 assert (pendingmax [i] >= pendingcnt [i]);
3040#if EV_IDLE_ENABLE
3041 assert (idleall >= 0);
3042 assert (idlemax [i] >= idlecnt [i]);
3043 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3044#endif
3045 }
3046
3047#if EV_FORK_ENABLE
3048 assert (forkmax >= forkcnt);
3049 array_verify (EV_A_ (W *)forks, forkcnt);
3050#endif
3051
3052#if EV_CLEANUP_ENABLE
3053 assert (cleanupmax >= cleanupcnt);
3054 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3055#endif
3056
1462#if EV_ASYNC_ENABLE 3057#if EV_ASYNC_ENABLE
1463 gotasync = 1; 3058 assert (asyncmax >= asynccnt);
3059 array_verify (EV_A_ (W *)asyncs, asynccnt);
3060#endif
3061
3062#if EV_PREPARE_ENABLE
3063 assert (preparemax >= preparecnt);
3064 array_verify (EV_A_ (W *)prepares, preparecnt);
3065#endif
3066
3067#if EV_CHECK_ENABLE
3068 assert (checkmax >= checkcnt);
3069 array_verify (EV_A_ (W *)checks, checkcnt);
3070#endif
3071
3072# if 0
3073#if EV_CHILD_ENABLE
3074 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3075 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3076#endif
1464#endif 3077# endif
1465
1466 ev_ref (EV_A);
1467 ev_io_stop (EV_A_ &pipeev);
1468
1469#if EV_USE_EVENTFD
1470 if (evfd >= 0)
1471 close (evfd);
1472#endif 3078#endif
1473
1474 if (evpipe [0] >= 0)
1475 {
1476 close (evpipe [0]);
1477 close (evpipe [1]);
1478 }
1479
1480 evpipe_init (EV_A);
1481 /* now iterate over everything, in case we missed something */
1482 pipecb (EV_A_ &pipeev, EV_READ);
1483 }
1484
1485 postfork = 0;
1486} 3079}
3080#endif
1487 3081
1488#if EV_MULTIPLICITY 3082#if EV_MULTIPLICITY
1489struct ev_loop * 3083struct ev_loop * ecb_cold
1490ev_loop_new (unsigned int flags)
1491{
1492 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1493
1494 memset (loop, 0, sizeof (struct ev_loop));
1495
1496 loop_init (EV_A_ flags);
1497
1498 if (ev_backend (EV_A))
1499 return loop;
1500
1501 return 0;
1502}
1503
1504void
1505ev_loop_destroy (EV_P)
1506{
1507 loop_destroy (EV_A);
1508 ev_free (loop);
1509}
1510
1511void
1512ev_loop_fork (EV_P)
1513{
1514 postfork = 1; /* must be in line with ev_default_fork */
1515}
1516
1517#if EV_VERIFY
1518static void
1519array_check (W **ws, int cnt)
1520{
1521 while (cnt--)
1522 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1523}
1524
1525static void
1526ev_loop_verify (EV_P)
1527{
1528 int i;
1529
1530 checkheap (timers, timercnt);
1531#if EV_PERIODIC_ENABLE
1532 checkheap (periodics, periodiccnt);
1533#endif
1534
1535#if EV_IDLE_ENABLE
1536 for (i = NUMPRI; i--; )
1537 array_check ((W **)idles [i], idlecnt [i]);
1538#endif
1539#if EV_FORK_ENABLE
1540 array_check ((W **)forks, forkcnt);
1541#endif
1542 array_check ((W **)prepares, preparecnt);
1543 array_check ((W **)checks, checkcnt);
1544#if EV_ASYNC_ENABLE
1545 array_check ((W **)asyncs, asynccnt);
1546#endif
1547}
1548#endif
1549
1550#endif
1551
1552#if EV_MULTIPLICITY
1553struct ev_loop *
1554ev_default_loop_init (unsigned int flags)
1555#else 3084#else
1556int 3085int
3086#endif
1557ev_default_loop (unsigned int flags) 3087ev_default_loop (unsigned int flags) EV_THROW
1558#endif
1559{ 3088{
1560 if (!ev_default_loop_ptr) 3089 if (!ev_default_loop_ptr)
1561 { 3090 {
1562#if EV_MULTIPLICITY 3091#if EV_MULTIPLICITY
1563 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3092 EV_P = ev_default_loop_ptr = &default_loop_struct;
1564#else 3093#else
1565 ev_default_loop_ptr = 1; 3094 ev_default_loop_ptr = 1;
1566#endif 3095#endif
1567 3096
1568 loop_init (EV_A_ flags); 3097 loop_init (EV_A_ flags);
1569 3098
1570 if (ev_backend (EV_A)) 3099 if (ev_backend (EV_A))
1571 { 3100 {
1572#ifndef _WIN32 3101#if EV_CHILD_ENABLE
1573 ev_signal_init (&childev, childcb, SIGCHLD); 3102 ev_signal_init (&childev, childcb, SIGCHLD);
1574 ev_set_priority (&childev, EV_MAXPRI); 3103 ev_set_priority (&childev, EV_MAXPRI);
1575 ev_signal_start (EV_A_ &childev); 3104 ev_signal_start (EV_A_ &childev);
1576 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3105 ev_unref (EV_A); /* child watcher should not keep loop alive */
1577#endif 3106#endif
… …
1582 3111
1583 return ev_default_loop_ptr; 3112 return ev_default_loop_ptr;
1584} 3113}
1585 3114
1586void 3115void
1587ev_default_destroy (void) 3116ev_loop_fork (EV_P) EV_THROW
1588{ 3117{
1589#if EV_MULTIPLICITY 3118 postfork = 1;
1590 struct ev_loop *loop = ev_default_loop_ptr;
1591#endif
1592
1593#ifndef _WIN32
1594 ev_ref (EV_A); /* child watcher */
1595 ev_signal_stop (EV_A_ &childev);
1596#endif
1597
1598 loop_destroy (EV_A);
1599}
1600
1601void
1602ev_default_fork (void)
1603{
1604#if EV_MULTIPLICITY
1605 struct ev_loop *loop = ev_default_loop_ptr;
1606#endif
1607
1608 if (backend)
1609 postfork = 1; /* must be in line with ev_loop_fork */
1610} 3119}
1611 3120
1612/*****************************************************************************/ 3121/*****************************************************************************/
1613 3122
1614void 3123void
1615ev_invoke (EV_P_ void *w, int revents) 3124ev_invoke (EV_P_ void *w, int revents)
1616{ 3125{
1617 EV_CB_INVOKE ((W)w, revents); 3126 EV_CB_INVOKE ((W)w, revents);
1618} 3127}
1619 3128
1620void inline_speed 3129unsigned int
1621call_pending (EV_P) 3130ev_pending_count (EV_P) EV_THROW
1622{ 3131{
1623 int pri; 3132 int pri;
1624 3133 unsigned int count = 0;
1625 EV_FREQUENT_CHECK;
1626 3134
1627 for (pri = NUMPRI; pri--; ) 3135 for (pri = NUMPRI; pri--; )
3136 count += pendingcnt [pri];
3137
3138 return count;
3139}
3140
3141void noinline
3142ev_invoke_pending (EV_P)
3143{
3144 pendingpri = NUMPRI;
3145
3146 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3147 {
3148 --pendingpri;
3149
1628 while (pendingcnt [pri]) 3150 while (pendingcnt [pendingpri])
1629 {
1630 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1631
1632 if (expect_true (p->w))
1633 { 3151 {
1634 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 3152 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1635 3153
1636 p->w->pending = 0; 3154 p->w->pending = 0;
1637 EV_CB_INVOKE (p->w, p->events); 3155 EV_CB_INVOKE (p->w, p->events);
3156 EV_FREQUENT_CHECK;
1638 } 3157 }
1639 } 3158 }
1640
1641 EV_FREQUENT_CHECK;
1642} 3159}
1643 3160
1644#if EV_IDLE_ENABLE 3161#if EV_IDLE_ENABLE
1645void inline_size 3162/* make idle watchers pending. this handles the "call-idle */
3163/* only when higher priorities are idle" logic */
3164inline_size void
1646idle_reify (EV_P) 3165idle_reify (EV_P)
1647{ 3166{
1648 if (expect_false (idleall)) 3167 if (expect_false (idleall))
1649 { 3168 {
1650 int pri; 3169 int pri;
… …
1662 } 3181 }
1663 } 3182 }
1664} 3183}
1665#endif 3184#endif
1666 3185
1667void inline_size 3186/* make timers pending */
3187inline_size void
1668timers_reify (EV_P) 3188timers_reify (EV_P)
1669{ 3189{
1670 EV_FREQUENT_CHECK; 3190 EV_FREQUENT_CHECK;
1671 3191
1672 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 3192 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1673 { 3193 {
1674 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 3194 do
1675
1676 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1677
1678 /* first reschedule or stop timer */
1679 if (w->repeat)
1680 { 3195 {
3196 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3197
3198 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3199
3200 /* first reschedule or stop timer */
3201 if (w->repeat)
3202 {
1681 ev_at (w) += w->repeat; 3203 ev_at (w) += w->repeat;
1682 if (ev_at (w) < mn_now) 3204 if (ev_at (w) < mn_now)
1683 ev_at (w) = mn_now; 3205 ev_at (w) = mn_now;
1684 3206
1685 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3207 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1686 3208
1687 ANHE_at_cache (timers [HEAP0]); 3209 ANHE_at_cache (timers [HEAP0]);
1688 downheap (timers, timercnt, HEAP0); 3210 downheap (timers, timercnt, HEAP0);
3211 }
3212 else
3213 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3214
3215 EV_FREQUENT_CHECK;
3216 feed_reverse (EV_A_ (W)w);
1689 } 3217 }
1690 else 3218 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1691 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1692 3219
1693 EV_FREQUENT_CHECK; 3220 feed_reverse_done (EV_A_ EV_TIMER);
1694 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1695 } 3221 }
1696} 3222}
1697 3223
1698#if EV_PERIODIC_ENABLE 3224#if EV_PERIODIC_ENABLE
1699void inline_size 3225
3226static void noinline
3227periodic_recalc (EV_P_ ev_periodic *w)
3228{
3229 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3230 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3231
3232 /* the above almost always errs on the low side */
3233 while (at <= ev_rt_now)
3234 {
3235 ev_tstamp nat = at + w->interval;
3236
3237 /* when resolution fails us, we use ev_rt_now */
3238 if (expect_false (nat == at))
3239 {
3240 at = ev_rt_now;
3241 break;
3242 }
3243
3244 at = nat;
3245 }
3246
3247 ev_at (w) = at;
3248}
3249
3250/* make periodics pending */
3251inline_size void
1700periodics_reify (EV_P) 3252periodics_reify (EV_P)
1701{ 3253{
1702 EV_FREQUENT_CHECK; 3254 EV_FREQUENT_CHECK;
3255
1703 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3256 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1704 { 3257 {
1705 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3258 do
1706
1707 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1708
1709 /* first reschedule or stop timer */
1710 if (w->reschedule_cb)
1711 { 3259 {
3260 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3261
3262 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3263
3264 /* first reschedule or stop timer */
3265 if (w->reschedule_cb)
3266 {
1712 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3267 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1713 3268
1714 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 3269 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1715 3270
1716 ANHE_at_cache (periodics [HEAP0]); 3271 ANHE_at_cache (periodics [HEAP0]);
1717 downheap (periodics, periodiccnt, HEAP0); 3272 downheap (periodics, periodiccnt, HEAP0);
3273 }
3274 else if (w->interval)
3275 {
3276 periodic_recalc (EV_A_ w);
3277 ANHE_at_cache (periodics [HEAP0]);
3278 downheap (periodics, periodiccnt, HEAP0);
3279 }
3280 else
3281 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3282
1718 EV_FREQUENT_CHECK; 3283 EV_FREQUENT_CHECK;
3284 feed_reverse (EV_A_ (W)w);
1719 } 3285 }
1720 else if (w->interval) 3286 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1721 {
1722 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1723 /* if next trigger time is not sufficiently in the future, put it there */
1724 /* this might happen because of floating point inexactness */
1725 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1726 {
1727 ev_at (w) += w->interval;
1728 3287
1729 /* if interval is unreasonably low we might still have a time in the past */
1730 /* so correct this. this will make the periodic very inexact, but the user */
1731 /* has effectively asked to get triggered more often than possible */
1732 if (ev_at (w) < ev_rt_now)
1733 ev_at (w) = ev_rt_now;
1734 }
1735
1736 ANHE_at_cache (periodics [HEAP0]);
1737 downheap (periodics, periodiccnt, HEAP0);
1738 }
1739 else
1740 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1741
1742 EV_FREQUENT_CHECK;
1743 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 3288 feed_reverse_done (EV_A_ EV_PERIODIC);
1744 } 3289 }
1745} 3290}
1746 3291
3292/* simply recalculate all periodics */
3293/* TODO: maybe ensure that at least one event happens when jumping forward? */
1747static void noinline 3294static void noinline ecb_cold
1748periodics_reschedule (EV_P) 3295periodics_reschedule (EV_P)
1749{ 3296{
1750 int i; 3297 int i;
1751 3298
1752 /* adjust periodics after time jump */ 3299 /* adjust periodics after time jump */
… …
1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3302 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1756 3303
1757 if (w->reschedule_cb) 3304 if (w->reschedule_cb)
1758 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3305 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1759 else if (w->interval) 3306 else if (w->interval)
1760 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3307 periodic_recalc (EV_A_ w);
1761 3308
1762 ANHE_at_cache (periodics [i]); 3309 ANHE_at_cache (periodics [i]);
1763 } 3310 }
1764 3311
1765 reheap (periodics, periodiccnt); 3312 reheap (periodics, periodiccnt);
1766} 3313}
1767#endif 3314#endif
1768 3315
1769void inline_speed 3316/* adjust all timers by a given offset */
3317static void noinline ecb_cold
3318timers_reschedule (EV_P_ ev_tstamp adjust)
3319{
3320 int i;
3321
3322 for (i = 0; i < timercnt; ++i)
3323 {
3324 ANHE *he = timers + i + HEAP0;
3325 ANHE_w (*he)->at += adjust;
3326 ANHE_at_cache (*he);
3327 }
3328}
3329
3330/* fetch new monotonic and realtime times from the kernel */
3331/* also detect if there was a timejump, and act accordingly */
3332inline_speed void
1770time_update (EV_P_ ev_tstamp max_block) 3333time_update (EV_P_ ev_tstamp max_block)
1771{ 3334{
1772 int i;
1773
1774#if EV_USE_MONOTONIC 3335#if EV_USE_MONOTONIC
1775 if (expect_true (have_monotonic)) 3336 if (expect_true (have_monotonic))
1776 { 3337 {
3338 int i;
1777 ev_tstamp odiff = rtmn_diff; 3339 ev_tstamp odiff = rtmn_diff;
1778 3340
1779 mn_now = get_clock (); 3341 mn_now = get_clock ();
1780 3342
1781 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3343 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1797 * doesn't hurt either as we only do this on time-jumps or 3359 * doesn't hurt either as we only do this on time-jumps or
1798 * in the unlikely event of having been preempted here. 3360 * in the unlikely event of having been preempted here.
1799 */ 3361 */
1800 for (i = 4; --i; ) 3362 for (i = 4; --i; )
1801 { 3363 {
3364 ev_tstamp diff;
1802 rtmn_diff = ev_rt_now - mn_now; 3365 rtmn_diff = ev_rt_now - mn_now;
1803 3366
3367 diff = odiff - rtmn_diff;
3368
1804 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3369 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1805 return; /* all is well */ 3370 return; /* all is well */
1806 3371
1807 ev_rt_now = ev_time (); 3372 ev_rt_now = ev_time ();
1808 mn_now = get_clock (); 3373 mn_now = get_clock ();
1809 now_floor = mn_now; 3374 now_floor = mn_now;
1810 } 3375 }
1811 3376
3377 /* no timer adjustment, as the monotonic clock doesn't jump */
3378 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1812# if EV_PERIODIC_ENABLE 3379# if EV_PERIODIC_ENABLE
1813 periodics_reschedule (EV_A); 3380 periodics_reschedule (EV_A);
1814# endif 3381# endif
1815 /* no timer adjustment, as the monotonic clock doesn't jump */
1816 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1817 } 3382 }
1818 else 3383 else
1819#endif 3384#endif
1820 { 3385 {
1821 ev_rt_now = ev_time (); 3386 ev_rt_now = ev_time ();
1822 3387
1823 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3388 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1824 { 3389 {
3390 /* adjust timers. this is easy, as the offset is the same for all of them */
3391 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1825#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
1826 periodics_reschedule (EV_A); 3393 periodics_reschedule (EV_A);
1827#endif 3394#endif
1828 /* adjust timers. this is easy, as the offset is the same for all of them */
1829 for (i = 0; i < timercnt; ++i)
1830 {
1831 ANHE *he = timers + i + HEAP0;
1832 ANHE_w (*he)->at += ev_rt_now - mn_now;
1833 ANHE_at_cache (*he);
1834 }
1835 } 3395 }
1836 3396
1837 mn_now = ev_rt_now; 3397 mn_now = ev_rt_now;
1838 } 3398 }
1839} 3399}
1840 3400
1841void 3401int
1842ev_ref (EV_P)
1843{
1844 ++activecnt;
1845}
1846
1847void
1848ev_unref (EV_P)
1849{
1850 --activecnt;
1851}
1852
1853static int loop_done;
1854
1855void
1856ev_loop (EV_P_ int flags) 3402ev_run (EV_P_ int flags)
1857{ 3403{
3404#if EV_FEATURE_API
3405 ++loop_depth;
3406#endif
3407
3408 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3409
1858 loop_done = EVUNLOOP_CANCEL; 3410 loop_done = EVBREAK_CANCEL;
1859 3411
1860 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3412 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1861 3413
1862 do 3414 do
1863 { 3415 {
3416#if EV_VERIFY >= 2
3417 ev_verify (EV_A);
3418#endif
3419
1864#ifndef _WIN32 3420#ifndef _WIN32
1865 if (expect_false (curpid)) /* penalise the forking check even more */ 3421 if (expect_false (curpid)) /* penalise the forking check even more */
1866 if (expect_false (getpid () != curpid)) 3422 if (expect_false (getpid () != curpid))
1867 { 3423 {
1868 curpid = getpid (); 3424 curpid = getpid ();
… …
1874 /* we might have forked, so queue fork handlers */ 3430 /* we might have forked, so queue fork handlers */
1875 if (expect_false (postfork)) 3431 if (expect_false (postfork))
1876 if (forkcnt) 3432 if (forkcnt)
1877 { 3433 {
1878 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3434 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1879 call_pending (EV_A); 3435 EV_INVOKE_PENDING;
1880 } 3436 }
1881#endif 3437#endif
1882 3438
3439#if EV_PREPARE_ENABLE
1883 /* queue prepare watchers (and execute them) */ 3440 /* queue prepare watchers (and execute them) */
1884 if (expect_false (preparecnt)) 3441 if (expect_false (preparecnt))
1885 { 3442 {
1886 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3443 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1887 call_pending (EV_A); 3444 EV_INVOKE_PENDING;
1888 } 3445 }
3446#endif
1889 3447
1890 if (expect_false (!activecnt)) 3448 if (expect_false (loop_done))
1891 break; 3449 break;
1892 3450
1893 /* we might have forked, so reify kernel state if necessary */ 3451 /* we might have forked, so reify kernel state if necessary */
1894 if (expect_false (postfork)) 3452 if (expect_false (postfork))
1895 loop_fork (EV_A); 3453 loop_fork (EV_A);
… …
1900 /* calculate blocking time */ 3458 /* calculate blocking time */
1901 { 3459 {
1902 ev_tstamp waittime = 0.; 3460 ev_tstamp waittime = 0.;
1903 ev_tstamp sleeptime = 0.; 3461 ev_tstamp sleeptime = 0.;
1904 3462
3463 /* remember old timestamp for io_blocktime calculation */
3464 ev_tstamp prev_mn_now = mn_now;
3465
3466 /* update time to cancel out callback processing overhead */
3467 time_update (EV_A_ 1e100);
3468
3469 /* from now on, we want a pipe-wake-up */
3470 pipe_write_wanted = 1;
3471
3472 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3473
1905 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3474 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1906 { 3475 {
1907 /* update time to cancel out callback processing overhead */
1908 time_update (EV_A_ 1e100);
1909
1910 waittime = MAX_BLOCKTIME; 3476 waittime = MAX_BLOCKTIME;
1911 3477
1912 if (timercnt) 3478 if (timercnt)
1913 { 3479 {
1914 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3480 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1915 if (waittime > to) waittime = to; 3481 if (waittime > to) waittime = to;
1916 } 3482 }
1917 3483
1918#if EV_PERIODIC_ENABLE 3484#if EV_PERIODIC_ENABLE
1919 if (periodiccnt) 3485 if (periodiccnt)
1920 { 3486 {
1921 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3487 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1922 if (waittime > to) waittime = to; 3488 if (waittime > to) waittime = to;
1923 } 3489 }
1924#endif 3490#endif
1925 3491
3492 /* don't let timeouts decrease the waittime below timeout_blocktime */
1926 if (expect_false (waittime < timeout_blocktime)) 3493 if (expect_false (waittime < timeout_blocktime))
1927 waittime = timeout_blocktime; 3494 waittime = timeout_blocktime;
1928 3495
1929 sleeptime = waittime - backend_fudge; 3496 /* at this point, we NEED to wait, so we have to ensure */
3497 /* to pass a minimum nonzero value to the backend */
3498 if (expect_false (waittime < backend_mintime))
3499 waittime = backend_mintime;
1930 3500
3501 /* extra check because io_blocktime is commonly 0 */
1931 if (expect_true (sleeptime > io_blocktime)) 3502 if (expect_false (io_blocktime))
1932 sleeptime = io_blocktime;
1933
1934 if (sleeptime)
1935 { 3503 {
3504 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3505
3506 if (sleeptime > waittime - backend_mintime)
3507 sleeptime = waittime - backend_mintime;
3508
3509 if (expect_true (sleeptime > 0.))
3510 {
1936 ev_sleep (sleeptime); 3511 ev_sleep (sleeptime);
1937 waittime -= sleeptime; 3512 waittime -= sleeptime;
3513 }
1938 } 3514 }
1939 } 3515 }
1940 3516
3517#if EV_FEATURE_API
1941 ++loop_count; 3518 ++loop_count;
3519#endif
3520 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1942 backend_poll (EV_A_ waittime); 3521 backend_poll (EV_A_ waittime);
3522 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3523
3524 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3525
3526 ECB_MEMORY_FENCE_ACQUIRE;
3527 if (pipe_write_skipped)
3528 {
3529 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3530 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3531 }
3532
1943 3533
1944 /* update ev_rt_now, do magic */ 3534 /* update ev_rt_now, do magic */
1945 time_update (EV_A_ waittime + sleeptime); 3535 time_update (EV_A_ waittime + sleeptime);
1946 } 3536 }
1947 3537
… …
1954#if EV_IDLE_ENABLE 3544#if EV_IDLE_ENABLE
1955 /* queue idle watchers unless other events are pending */ 3545 /* queue idle watchers unless other events are pending */
1956 idle_reify (EV_A); 3546 idle_reify (EV_A);
1957#endif 3547#endif
1958 3548
3549#if EV_CHECK_ENABLE
1959 /* queue check watchers, to be executed first */ 3550 /* queue check watchers, to be executed first */
1960 if (expect_false (checkcnt)) 3551 if (expect_false (checkcnt))
1961 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3552 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3553#endif
1962 3554
1963 call_pending (EV_A); 3555 EV_INVOKE_PENDING;
1964 } 3556 }
1965 while (expect_true ( 3557 while (expect_true (
1966 activecnt 3558 activecnt
1967 && !loop_done 3559 && !loop_done
1968 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3560 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1969 )); 3561 ));
1970 3562
1971 if (loop_done == EVUNLOOP_ONE) 3563 if (loop_done == EVBREAK_ONE)
1972 loop_done = EVUNLOOP_CANCEL; 3564 loop_done = EVBREAK_CANCEL;
3565
3566#if EV_FEATURE_API
3567 --loop_depth;
3568#endif
3569
3570 return activecnt;
1973} 3571}
1974 3572
1975void 3573void
1976ev_unloop (EV_P_ int how) 3574ev_break (EV_P_ int how) EV_THROW
1977{ 3575{
1978 loop_done = how; 3576 loop_done = how;
1979} 3577}
1980 3578
3579void
3580ev_ref (EV_P) EV_THROW
3581{
3582 ++activecnt;
3583}
3584
3585void
3586ev_unref (EV_P) EV_THROW
3587{
3588 --activecnt;
3589}
3590
3591void
3592ev_now_update (EV_P) EV_THROW
3593{
3594 time_update (EV_A_ 1e100);
3595}
3596
3597void
3598ev_suspend (EV_P) EV_THROW
3599{
3600 ev_now_update (EV_A);
3601}
3602
3603void
3604ev_resume (EV_P) EV_THROW
3605{
3606 ev_tstamp mn_prev = mn_now;
3607
3608 ev_now_update (EV_A);
3609 timers_reschedule (EV_A_ mn_now - mn_prev);
3610#if EV_PERIODIC_ENABLE
3611 /* TODO: really do this? */
3612 periodics_reschedule (EV_A);
3613#endif
3614}
3615
1981/*****************************************************************************/ 3616/*****************************************************************************/
3617/* singly-linked list management, used when the expected list length is short */
1982 3618
1983void inline_size 3619inline_size void
1984wlist_add (WL *head, WL elem) 3620wlist_add (WL *head, WL elem)
1985{ 3621{
1986 elem->next = *head; 3622 elem->next = *head;
1987 *head = elem; 3623 *head = elem;
1988} 3624}
1989 3625
1990void inline_size 3626inline_size void
1991wlist_del (WL *head, WL elem) 3627wlist_del (WL *head, WL elem)
1992{ 3628{
1993 while (*head) 3629 while (*head)
1994 { 3630 {
1995 if (*head == elem) 3631 if (expect_true (*head == elem))
1996 { 3632 {
1997 *head = elem->next; 3633 *head = elem->next;
1998 return; 3634 break;
1999 } 3635 }
2000 3636
2001 head = &(*head)->next; 3637 head = &(*head)->next;
2002 } 3638 }
2003} 3639}
2004 3640
2005void inline_speed 3641/* internal, faster, version of ev_clear_pending */
3642inline_speed void
2006clear_pending (EV_P_ W w) 3643clear_pending (EV_P_ W w)
2007{ 3644{
2008 if (w->pending) 3645 if (w->pending)
2009 { 3646 {
2010 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3647 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2011 w->pending = 0; 3648 w->pending = 0;
2012 } 3649 }
2013} 3650}
2014 3651
2015int 3652int
2016ev_clear_pending (EV_P_ void *w) 3653ev_clear_pending (EV_P_ void *w) EV_THROW
2017{ 3654{
2018 W w_ = (W)w; 3655 W w_ = (W)w;
2019 int pending = w_->pending; 3656 int pending = w_->pending;
2020 3657
2021 if (expect_true (pending)) 3658 if (expect_true (pending))
2022 { 3659 {
2023 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3660 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3661 p->w = (W)&pending_w;
2024 w_->pending = 0; 3662 w_->pending = 0;
2025 p->w = 0;
2026 return p->events; 3663 return p->events;
2027 } 3664 }
2028 else 3665 else
2029 return 0; 3666 return 0;
2030} 3667}
2031 3668
2032void inline_size 3669inline_size void
2033pri_adjust (EV_P_ W w) 3670pri_adjust (EV_P_ W w)
2034{ 3671{
2035 int pri = w->priority; 3672 int pri = ev_priority (w);
2036 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3673 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2037 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3674 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2038 w->priority = pri; 3675 ev_set_priority (w, pri);
2039} 3676}
2040 3677
2041void inline_speed 3678inline_speed void
2042ev_start (EV_P_ W w, int active) 3679ev_start (EV_P_ W w, int active)
2043{ 3680{
2044 pri_adjust (EV_A_ w); 3681 pri_adjust (EV_A_ w);
2045 w->active = active; 3682 w->active = active;
2046 ev_ref (EV_A); 3683 ev_ref (EV_A);
2047} 3684}
2048 3685
2049void inline_size 3686inline_size void
2050ev_stop (EV_P_ W w) 3687ev_stop (EV_P_ W w)
2051{ 3688{
2052 ev_unref (EV_A); 3689 ev_unref (EV_A);
2053 w->active = 0; 3690 w->active = 0;
2054} 3691}
2055 3692
2056/*****************************************************************************/ 3693/*****************************************************************************/
2057 3694
2058void noinline 3695void noinline
2059ev_io_start (EV_P_ ev_io *w) 3696ev_io_start (EV_P_ ev_io *w) EV_THROW
2060{ 3697{
2061 int fd = w->fd; 3698 int fd = w->fd;
2062 3699
2063 if (expect_false (ev_is_active (w))) 3700 if (expect_false (ev_is_active (w)))
2064 return; 3701 return;
2065 3702
2066 assert (("ev_io_start called with negative fd", fd >= 0)); 3703 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3704 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2067 3705
2068 EV_FREQUENT_CHECK; 3706 EV_FREQUENT_CHECK;
2069 3707
2070 ev_start (EV_A_ (W)w, 1); 3708 ev_start (EV_A_ (W)w, 1);
2071 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3709 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2072 wlist_add (&anfds[fd].head, (WL)w); 3710 wlist_add (&anfds[fd].head, (WL)w);
2073 3711
3712 /* common bug, apparently */
3713 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3714
2074 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3715 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2075 w->events &= ~EV_IOFDSET; 3716 w->events &= ~EV__IOFDSET;
2076 3717
2077 EV_FREQUENT_CHECK; 3718 EV_FREQUENT_CHECK;
2078} 3719}
2079 3720
2080void noinline 3721void noinline
2081ev_io_stop (EV_P_ ev_io *w) 3722ev_io_stop (EV_P_ ev_io *w) EV_THROW
2082{ 3723{
2083 clear_pending (EV_A_ (W)w); 3724 clear_pending (EV_A_ (W)w);
2084 if (expect_false (!ev_is_active (w))) 3725 if (expect_false (!ev_is_active (w)))
2085 return; 3726 return;
2086 3727
2087 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3728 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2088 3729
2089 EV_FREQUENT_CHECK; 3730 EV_FREQUENT_CHECK;
2090 3731
2091 wlist_del (&anfds[w->fd].head, (WL)w); 3732 wlist_del (&anfds[w->fd].head, (WL)w);
2092 ev_stop (EV_A_ (W)w); 3733 ev_stop (EV_A_ (W)w);
2093 3734
2094 fd_change (EV_A_ w->fd, 1); 3735 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2095 3736
2096 EV_FREQUENT_CHECK; 3737 EV_FREQUENT_CHECK;
2097} 3738}
2098 3739
2099void noinline 3740void noinline
2100ev_timer_start (EV_P_ ev_timer *w) 3741ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2101{ 3742{
2102 if (expect_false (ev_is_active (w))) 3743 if (expect_false (ev_is_active (w)))
2103 return; 3744 return;
2104 3745
2105 ev_at (w) += mn_now; 3746 ev_at (w) += mn_now;
2106 3747
2107 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3748 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2108 3749
2109 EV_FREQUENT_CHECK; 3750 EV_FREQUENT_CHECK;
2110 3751
2111 ++timercnt; 3752 ++timercnt;
2112 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3753 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
… …
2115 ANHE_at_cache (timers [ev_active (w)]); 3756 ANHE_at_cache (timers [ev_active (w)]);
2116 upheap (timers, ev_active (w)); 3757 upheap (timers, ev_active (w));
2117 3758
2118 EV_FREQUENT_CHECK; 3759 EV_FREQUENT_CHECK;
2119 3760
2120 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3761 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2121} 3762}
2122 3763
2123void noinline 3764void noinline
2124ev_timer_stop (EV_P_ ev_timer *w) 3765ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2125{ 3766{
2126 clear_pending (EV_A_ (W)w); 3767 clear_pending (EV_A_ (W)w);
2127 if (expect_false (!ev_is_active (w))) 3768 if (expect_false (!ev_is_active (w)))
2128 return; 3769 return;
2129 3770
2130 EV_FREQUENT_CHECK; 3771 EV_FREQUENT_CHECK;
2131 3772
2132 { 3773 {
2133 int active = ev_active (w); 3774 int active = ev_active (w);
2134 3775
2135 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 3776 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2136 3777
2137 --timercnt; 3778 --timercnt;
2138 3779
2139 if (expect_true (active < timercnt + HEAP0)) 3780 if (expect_true (active < timercnt + HEAP0))
2140 { 3781 {
2141 timers [active] = timers [timercnt + HEAP0]; 3782 timers [active] = timers [timercnt + HEAP0];
2142 adjustheap (timers, timercnt, active); 3783 adjustheap (timers, timercnt, active);
2143 } 3784 }
2144 } 3785 }
2145 3786
2146 EV_FREQUENT_CHECK;
2147
2148 ev_at (w) -= mn_now; 3787 ev_at (w) -= mn_now;
2149 3788
2150 ev_stop (EV_A_ (W)w); 3789 ev_stop (EV_A_ (W)w);
3790
3791 EV_FREQUENT_CHECK;
2151} 3792}
2152 3793
2153void noinline 3794void noinline
2154ev_timer_again (EV_P_ ev_timer *w) 3795ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2155{ 3796{
2156 EV_FREQUENT_CHECK; 3797 EV_FREQUENT_CHECK;
3798
3799 clear_pending (EV_A_ (W)w);
2157 3800
2158 if (ev_is_active (w)) 3801 if (ev_is_active (w))
2159 { 3802 {
2160 if (w->repeat) 3803 if (w->repeat)
2161 { 3804 {
… …
2173 } 3816 }
2174 3817
2175 EV_FREQUENT_CHECK; 3818 EV_FREQUENT_CHECK;
2176} 3819}
2177 3820
3821ev_tstamp
3822ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3823{
3824 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3825}
3826
2178#if EV_PERIODIC_ENABLE 3827#if EV_PERIODIC_ENABLE
2179void noinline 3828void noinline
2180ev_periodic_start (EV_P_ ev_periodic *w) 3829ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2181{ 3830{
2182 if (expect_false (ev_is_active (w))) 3831 if (expect_false (ev_is_active (w)))
2183 return; 3832 return;
2184 3833
2185 if (w->reschedule_cb) 3834 if (w->reschedule_cb)
2186 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3835 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2187 else if (w->interval) 3836 else if (w->interval)
2188 { 3837 {
2189 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3838 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2190 /* this formula differs from the one in periodic_reify because we do not always round up */ 3839 periodic_recalc (EV_A_ w);
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2192 } 3840 }
2193 else 3841 else
2194 ev_at (w) = w->offset; 3842 ev_at (w) = w->offset;
2195 3843
2196 EV_FREQUENT_CHECK; 3844 EV_FREQUENT_CHECK;
… …
2202 ANHE_at_cache (periodics [ev_active (w)]); 3850 ANHE_at_cache (periodics [ev_active (w)]);
2203 upheap (periodics, ev_active (w)); 3851 upheap (periodics, ev_active (w));
2204 3852
2205 EV_FREQUENT_CHECK; 3853 EV_FREQUENT_CHECK;
2206 3854
2207 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3855 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2208} 3856}
2209 3857
2210void noinline 3858void noinline
2211ev_periodic_stop (EV_P_ ev_periodic *w) 3859ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2212{ 3860{
2213 clear_pending (EV_A_ (W)w); 3861 clear_pending (EV_A_ (W)w);
2214 if (expect_false (!ev_is_active (w))) 3862 if (expect_false (!ev_is_active (w)))
2215 return; 3863 return;
2216 3864
2217 EV_FREQUENT_CHECK; 3865 EV_FREQUENT_CHECK;
2218 3866
2219 { 3867 {
2220 int active = ev_active (w); 3868 int active = ev_active (w);
2221 3869
2222 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 3870 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2223 3871
2224 --periodiccnt; 3872 --periodiccnt;
2225 3873
2226 if (expect_true (active < periodiccnt + HEAP0)) 3874 if (expect_true (active < periodiccnt + HEAP0))
2227 { 3875 {
2228 periodics [active] = periodics [periodiccnt + HEAP0]; 3876 periodics [active] = periodics [periodiccnt + HEAP0];
2229 adjustheap (periodics, periodiccnt, active); 3877 adjustheap (periodics, periodiccnt, active);
2230 } 3878 }
2231 } 3879 }
2232 3880
2233 EV_FREQUENT_CHECK;
2234
2235 ev_stop (EV_A_ (W)w); 3881 ev_stop (EV_A_ (W)w);
3882
3883 EV_FREQUENT_CHECK;
2236} 3884}
2237 3885
2238void noinline 3886void noinline
2239ev_periodic_again (EV_P_ ev_periodic *w) 3887ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2240{ 3888{
2241 /* TODO: use adjustheap and recalculation */ 3889 /* TODO: use adjustheap and recalculation */
2242 ev_periodic_stop (EV_A_ w); 3890 ev_periodic_stop (EV_A_ w);
2243 ev_periodic_start (EV_A_ w); 3891 ev_periodic_start (EV_A_ w);
2244} 3892}
… …
2246 3894
2247#ifndef SA_RESTART 3895#ifndef SA_RESTART
2248# define SA_RESTART 0 3896# define SA_RESTART 0
2249#endif 3897#endif
2250 3898
3899#if EV_SIGNAL_ENABLE
3900
2251void noinline 3901void noinline
2252ev_signal_start (EV_P_ ev_signal *w) 3902ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2253{ 3903{
2254#if EV_MULTIPLICITY
2255 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2256#endif
2257 if (expect_false (ev_is_active (w))) 3904 if (expect_false (ev_is_active (w)))
2258 return; 3905 return;
2259 3906
2260 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3907 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2261 3908
2262 evpipe_init (EV_A); 3909#if EV_MULTIPLICITY
3910 assert (("libev: a signal must not be attached to two different loops",
3911 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2263 3912
2264 EV_FREQUENT_CHECK; 3913 signals [w->signum - 1].loop = EV_A;
3914 ECB_MEMORY_FENCE_RELEASE;
3915#endif
2265 3916
3917 EV_FREQUENT_CHECK;
3918
3919#if EV_USE_SIGNALFD
3920 if (sigfd == -2)
2266 { 3921 {
2267#ifndef _WIN32 3922 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2268 sigset_t full, prev; 3923 if (sigfd < 0 && errno == EINVAL)
2269 sigfillset (&full); 3924 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2270 sigprocmask (SIG_SETMASK, &full, &prev);
2271#endif
2272 3925
2273 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3926 if (sigfd >= 0)
3927 {
3928 fd_intern (sigfd); /* doing it twice will not hurt */
2274 3929
2275#ifndef _WIN32 3930 sigemptyset (&sigfd_set);
2276 sigprocmask (SIG_SETMASK, &prev, 0); 3931
2277#endif 3932 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3933 ev_set_priority (&sigfd_w, EV_MAXPRI);
3934 ev_io_start (EV_A_ &sigfd_w);
3935 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3936 }
2278 } 3937 }
3938
3939 if (sigfd >= 0)
3940 {
3941 /* TODO: check .head */
3942 sigaddset (&sigfd_set, w->signum);
3943 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3944
3945 signalfd (sigfd, &sigfd_set, 0);
3946 }
3947#endif
2279 3948
2280 ev_start (EV_A_ (W)w, 1); 3949 ev_start (EV_A_ (W)w, 1);
2281 wlist_add (&signals [w->signum - 1].head, (WL)w); 3950 wlist_add (&signals [w->signum - 1].head, (WL)w);
2282 3951
2283 if (!((WL)w)->next) 3952 if (!((WL)w)->next)
3953# if EV_USE_SIGNALFD
3954 if (sigfd < 0) /*TODO*/
3955# endif
2284 { 3956 {
2285#if _WIN32 3957# ifdef _WIN32
3958 evpipe_init (EV_A);
3959
2286 signal (w->signum, ev_sighandler); 3960 signal (w->signum, ev_sighandler);
2287#else 3961# else
2288 struct sigaction sa; 3962 struct sigaction sa;
3963
3964 evpipe_init (EV_A);
3965
2289 sa.sa_handler = ev_sighandler; 3966 sa.sa_handler = ev_sighandler;
2290 sigfillset (&sa.sa_mask); 3967 sigfillset (&sa.sa_mask);
2291 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3968 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2292 sigaction (w->signum, &sa, 0); 3969 sigaction (w->signum, &sa, 0);
3970
3971 if (origflags & EVFLAG_NOSIGMASK)
3972 {
3973 sigemptyset (&sa.sa_mask);
3974 sigaddset (&sa.sa_mask, w->signum);
3975 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3976 }
2293#endif 3977#endif
2294 } 3978 }
2295 3979
2296 EV_FREQUENT_CHECK; 3980 EV_FREQUENT_CHECK;
2297} 3981}
2298 3982
2299void noinline 3983void noinline
2300ev_signal_stop (EV_P_ ev_signal *w) 3984ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2301{ 3985{
2302 clear_pending (EV_A_ (W)w); 3986 clear_pending (EV_A_ (W)w);
2303 if (expect_false (!ev_is_active (w))) 3987 if (expect_false (!ev_is_active (w)))
2304 return; 3988 return;
2305 3989
… …
2307 3991
2308 wlist_del (&signals [w->signum - 1].head, (WL)w); 3992 wlist_del (&signals [w->signum - 1].head, (WL)w);
2309 ev_stop (EV_A_ (W)w); 3993 ev_stop (EV_A_ (W)w);
2310 3994
2311 if (!signals [w->signum - 1].head) 3995 if (!signals [w->signum - 1].head)
3996 {
3997#if EV_MULTIPLICITY
3998 signals [w->signum - 1].loop = 0; /* unattach from signal */
3999#endif
4000#if EV_USE_SIGNALFD
4001 if (sigfd >= 0)
4002 {
4003 sigset_t ss;
4004
4005 sigemptyset (&ss);
4006 sigaddset (&ss, w->signum);
4007 sigdelset (&sigfd_set, w->signum);
4008
4009 signalfd (sigfd, &sigfd_set, 0);
4010 sigprocmask (SIG_UNBLOCK, &ss, 0);
4011 }
4012 else
4013#endif
2312 signal (w->signum, SIG_DFL); 4014 signal (w->signum, SIG_DFL);
4015 }
2313 4016
2314 EV_FREQUENT_CHECK; 4017 EV_FREQUENT_CHECK;
2315} 4018}
4019
4020#endif
4021
4022#if EV_CHILD_ENABLE
2316 4023
2317void 4024void
2318ev_child_start (EV_P_ ev_child *w) 4025ev_child_start (EV_P_ ev_child *w) EV_THROW
2319{ 4026{
2320#if EV_MULTIPLICITY 4027#if EV_MULTIPLICITY
2321 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4028 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2322#endif 4029#endif
2323 if (expect_false (ev_is_active (w))) 4030 if (expect_false (ev_is_active (w)))
2324 return; 4031 return;
2325 4032
2326 EV_FREQUENT_CHECK; 4033 EV_FREQUENT_CHECK;
2327 4034
2328 ev_start (EV_A_ (W)w, 1); 4035 ev_start (EV_A_ (W)w, 1);
2329 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4036 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2330 4037
2331 EV_FREQUENT_CHECK; 4038 EV_FREQUENT_CHECK;
2332} 4039}
2333 4040
2334void 4041void
2335ev_child_stop (EV_P_ ev_child *w) 4042ev_child_stop (EV_P_ ev_child *w) EV_THROW
2336{ 4043{
2337 clear_pending (EV_A_ (W)w); 4044 clear_pending (EV_A_ (W)w);
2338 if (expect_false (!ev_is_active (w))) 4045 if (expect_false (!ev_is_active (w)))
2339 return; 4046 return;
2340 4047
2341 EV_FREQUENT_CHECK; 4048 EV_FREQUENT_CHECK;
2342 4049
2343 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4050 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2344 ev_stop (EV_A_ (W)w); 4051 ev_stop (EV_A_ (W)w);
2345 4052
2346 EV_FREQUENT_CHECK; 4053 EV_FREQUENT_CHECK;
2347} 4054}
4055
4056#endif
2348 4057
2349#if EV_STAT_ENABLE 4058#if EV_STAT_ENABLE
2350 4059
2351# ifdef _WIN32 4060# ifdef _WIN32
2352# undef lstat 4061# undef lstat
2353# define lstat(a,b) _stati64 (a,b) 4062# define lstat(a,b) _stati64 (a,b)
2354# endif 4063# endif
2355 4064
2356#define DEF_STAT_INTERVAL 5.0074891 4065#define DEF_STAT_INTERVAL 5.0074891
4066#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2357#define MIN_STAT_INTERVAL 0.1074891 4067#define MIN_STAT_INTERVAL 0.1074891
2358 4068
2359static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4069static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2360 4070
2361#if EV_USE_INOTIFY 4071#if EV_USE_INOTIFY
2362# define EV_INOTIFY_BUFSIZE 8192 4072
4073/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4074# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2363 4075
2364static void noinline 4076static void noinline
2365infy_add (EV_P_ ev_stat *w) 4077infy_add (EV_P_ ev_stat *w)
2366{ 4078{
2367 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); 4079 w->wd = inotify_add_watch (fs_fd, w->path,
4080 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4081 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4082 | IN_DONT_FOLLOW | IN_MASK_ADD);
2368 4083
2369 if (w->wd < 0) 4084 if (w->wd >= 0)
4085 {
4086 struct statfs sfs;
4087
4088 /* now local changes will be tracked by inotify, but remote changes won't */
4089 /* unless the filesystem is known to be local, we therefore still poll */
4090 /* also do poll on <2.6.25, but with normal frequency */
4091
4092 if (!fs_2625)
4093 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4094 else if (!statfs (w->path, &sfs)
4095 && (sfs.f_type == 0x1373 /* devfs */
4096 || sfs.f_type == 0x4006 /* fat */
4097 || sfs.f_type == 0x4d44 /* msdos */
4098 || sfs.f_type == 0xEF53 /* ext2/3 */
4099 || sfs.f_type == 0x72b6 /* jffs2 */
4100 || sfs.f_type == 0x858458f6 /* ramfs */
4101 || sfs.f_type == 0x5346544e /* ntfs */
4102 || sfs.f_type == 0x3153464a /* jfs */
4103 || sfs.f_type == 0x9123683e /* btrfs */
4104 || sfs.f_type == 0x52654973 /* reiser3 */
4105 || sfs.f_type == 0x01021994 /* tmpfs */
4106 || sfs.f_type == 0x58465342 /* xfs */))
4107 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4108 else
4109 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2370 { 4110 }
2371 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4111 else
4112 {
4113 /* can't use inotify, continue to stat */
4114 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2372 4115
2373 /* monitor some parent directory for speedup hints */ 4116 /* if path is not there, monitor some parent directory for speedup hints */
2374 /* note that exceeding the hardcoded limit is not a correctness issue, */ 4117 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2375 /* but an efficiency issue only */ 4118 /* but an efficiency issue only */
2376 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4119 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2377 { 4120 {
2378 char path [4096]; 4121 char path [4096];
2379 strcpy (path, w->path); 4122 strcpy (path, w->path);
… …
2383 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4126 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2384 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4127 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2385 4128
2386 char *pend = strrchr (path, '/'); 4129 char *pend = strrchr (path, '/');
2387 4130
2388 if (!pend) 4131 if (!pend || pend == path)
2389 break; /* whoops, no '/', complain to your admin */ 4132 break;
2390 4133
2391 *pend = 0; 4134 *pend = 0;
2392 w->wd = inotify_add_watch (fs_fd, path, mask); 4135 w->wd = inotify_add_watch (fs_fd, path, mask);
2393 } 4136 }
2394 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4137 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2395 } 4138 }
2396 } 4139 }
2397 else
2398 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2399 4140
2400 if (w->wd >= 0) 4141 if (w->wd >= 0)
2401 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4142 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4143
4144 /* now re-arm timer, if required */
4145 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4146 ev_timer_again (EV_A_ &w->timer);
4147 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2402} 4148}
2403 4149
2404static void noinline 4150static void noinline
2405infy_del (EV_P_ ev_stat *w) 4151infy_del (EV_P_ ev_stat *w)
2406{ 4152{
… …
2409 4155
2410 if (wd < 0) 4156 if (wd < 0)
2411 return; 4157 return;
2412 4158
2413 w->wd = -2; 4159 w->wd = -2;
2414 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4160 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2415 wlist_del (&fs_hash [slot].head, (WL)w); 4161 wlist_del (&fs_hash [slot].head, (WL)w);
2416 4162
2417 /* remove this watcher, if others are watching it, they will rearm */ 4163 /* remove this watcher, if others are watching it, they will rearm */
2418 inotify_rm_watch (fs_fd, wd); 4164 inotify_rm_watch (fs_fd, wd);
2419} 4165}
2420 4166
2421static void noinline 4167static void noinline
2422infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4168infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2423{ 4169{
2424 if (slot < 0) 4170 if (slot < 0)
2425 /* overflow, need to check for all hahs slots */ 4171 /* overflow, need to check for all hash slots */
2426 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4172 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2427 infy_wd (EV_A_ slot, wd, ev); 4173 infy_wd (EV_A_ slot, wd, ev);
2428 else 4174 else
2429 { 4175 {
2430 WL w_; 4176 WL w_;
2431 4177
2432 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4178 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2433 { 4179 {
2434 ev_stat *w = (ev_stat *)w_; 4180 ev_stat *w = (ev_stat *)w_;
2435 w_ = w_->next; /* lets us remove this watcher and all before it */ 4181 w_ = w_->next; /* lets us remove this watcher and all before it */
2436 4182
2437 if (w->wd == wd || wd == -1) 4183 if (w->wd == wd || wd == -1)
2438 { 4184 {
2439 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4185 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2440 { 4186 {
4187 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2441 w->wd = -1; 4188 w->wd = -1;
2442 infy_add (EV_A_ w); /* re-add, no matter what */ 4189 infy_add (EV_A_ w); /* re-add, no matter what */
2443 } 4190 }
2444 4191
2445 stat_timer_cb (EV_A_ &w->timer, 0); 4192 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2450 4197
2451static void 4198static void
2452infy_cb (EV_P_ ev_io *w, int revents) 4199infy_cb (EV_P_ ev_io *w, int revents)
2453{ 4200{
2454 char buf [EV_INOTIFY_BUFSIZE]; 4201 char buf [EV_INOTIFY_BUFSIZE];
2455 struct inotify_event *ev = (struct inotify_event *)buf;
2456 int ofs; 4202 int ofs;
2457 int len = read (fs_fd, buf, sizeof (buf)); 4203 int len = read (fs_fd, buf, sizeof (buf));
2458 4204
2459 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4205 for (ofs = 0; ofs < len; )
4206 {
4207 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2460 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4208 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4209 ofs += sizeof (struct inotify_event) + ev->len;
4210 }
2461} 4211}
2462 4212
2463void inline_size 4213inline_size void ecb_cold
4214ev_check_2625 (EV_P)
4215{
4216 /* kernels < 2.6.25 are borked
4217 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4218 */
4219 if (ev_linux_version () < 0x020619)
4220 return;
4221
4222 fs_2625 = 1;
4223}
4224
4225inline_size int
4226infy_newfd (void)
4227{
4228#if defined IN_CLOEXEC && defined IN_NONBLOCK
4229 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4230 if (fd >= 0)
4231 return fd;
4232#endif
4233 return inotify_init ();
4234}
4235
4236inline_size void
2464infy_init (EV_P) 4237infy_init (EV_P)
2465{ 4238{
2466 if (fs_fd != -2) 4239 if (fs_fd != -2)
2467 return; 4240 return;
2468 4241
4242 fs_fd = -1;
4243
4244 ev_check_2625 (EV_A);
4245
2469 fs_fd = inotify_init (); 4246 fs_fd = infy_newfd ();
2470 4247
2471 if (fs_fd >= 0) 4248 if (fs_fd >= 0)
2472 { 4249 {
4250 fd_intern (fs_fd);
2473 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4251 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2474 ev_set_priority (&fs_w, EV_MAXPRI); 4252 ev_set_priority (&fs_w, EV_MAXPRI);
2475 ev_io_start (EV_A_ &fs_w); 4253 ev_io_start (EV_A_ &fs_w);
4254 ev_unref (EV_A);
2476 } 4255 }
2477} 4256}
2478 4257
2479void inline_size 4258inline_size void
2480infy_fork (EV_P) 4259infy_fork (EV_P)
2481{ 4260{
2482 int slot; 4261 int slot;
2483 4262
2484 if (fs_fd < 0) 4263 if (fs_fd < 0)
2485 return; 4264 return;
2486 4265
4266 ev_ref (EV_A);
4267 ev_io_stop (EV_A_ &fs_w);
2487 close (fs_fd); 4268 close (fs_fd);
2488 fs_fd = inotify_init (); 4269 fs_fd = infy_newfd ();
2489 4270
4271 if (fs_fd >= 0)
4272 {
4273 fd_intern (fs_fd);
4274 ev_io_set (&fs_w, fs_fd, EV_READ);
4275 ev_io_start (EV_A_ &fs_w);
4276 ev_unref (EV_A);
4277 }
4278
2490 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4279 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2491 { 4280 {
2492 WL w_ = fs_hash [slot].head; 4281 WL w_ = fs_hash [slot].head;
2493 fs_hash [slot].head = 0; 4282 fs_hash [slot].head = 0;
2494 4283
2495 while (w_) 4284 while (w_)
… …
2500 w->wd = -1; 4289 w->wd = -1;
2501 4290
2502 if (fs_fd >= 0) 4291 if (fs_fd >= 0)
2503 infy_add (EV_A_ w); /* re-add, no matter what */ 4292 infy_add (EV_A_ w); /* re-add, no matter what */
2504 else 4293 else
4294 {
4295 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4296 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2505 ev_timer_start (EV_A_ &w->timer); 4297 ev_timer_again (EV_A_ &w->timer);
4298 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4299 }
2506 } 4300 }
2507
2508 } 4301 }
2509} 4302}
2510 4303
4304#endif
4305
4306#ifdef _WIN32
4307# define EV_LSTAT(p,b) _stati64 (p, b)
4308#else
4309# define EV_LSTAT(p,b) lstat (p, b)
2511#endif 4310#endif
2512 4311
2513void 4312void
2514ev_stat_stat (EV_P_ ev_stat *w) 4313ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2515{ 4314{
2516 if (lstat (w->path, &w->attr) < 0) 4315 if (lstat (w->path, &w->attr) < 0)
2517 w->attr.st_nlink = 0; 4316 w->attr.st_nlink = 0;
2518 else if (!w->attr.st_nlink) 4317 else if (!w->attr.st_nlink)
2519 w->attr.st_nlink = 1; 4318 w->attr.st_nlink = 1;
… …
2522static void noinline 4321static void noinline
2523stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4322stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2524{ 4323{
2525 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4324 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2526 4325
2527 /* we copy this here each the time so that */ 4326 ev_statdata prev = w->attr;
2528 /* prev has the old value when the callback gets invoked */
2529 w->prev = w->attr;
2530 ev_stat_stat (EV_A_ w); 4327 ev_stat_stat (EV_A_ w);
2531 4328
2532 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4329 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2533 if ( 4330 if (
2534 w->prev.st_dev != w->attr.st_dev 4331 prev.st_dev != w->attr.st_dev
2535 || w->prev.st_ino != w->attr.st_ino 4332 || prev.st_ino != w->attr.st_ino
2536 || w->prev.st_mode != w->attr.st_mode 4333 || prev.st_mode != w->attr.st_mode
2537 || w->prev.st_nlink != w->attr.st_nlink 4334 || prev.st_nlink != w->attr.st_nlink
2538 || w->prev.st_uid != w->attr.st_uid 4335 || prev.st_uid != w->attr.st_uid
2539 || w->prev.st_gid != w->attr.st_gid 4336 || prev.st_gid != w->attr.st_gid
2540 || w->prev.st_rdev != w->attr.st_rdev 4337 || prev.st_rdev != w->attr.st_rdev
2541 || w->prev.st_size != w->attr.st_size 4338 || prev.st_size != w->attr.st_size
2542 || w->prev.st_atime != w->attr.st_atime 4339 || prev.st_atime != w->attr.st_atime
2543 || w->prev.st_mtime != w->attr.st_mtime 4340 || prev.st_mtime != w->attr.st_mtime
2544 || w->prev.st_ctime != w->attr.st_ctime 4341 || prev.st_ctime != w->attr.st_ctime
2545 ) { 4342 ) {
4343 /* we only update w->prev on actual differences */
4344 /* in case we test more often than invoke the callback, */
4345 /* to ensure that prev is always different to attr */
4346 w->prev = prev;
4347
2546 #if EV_USE_INOTIFY 4348 #if EV_USE_INOTIFY
4349 if (fs_fd >= 0)
4350 {
2547 infy_del (EV_A_ w); 4351 infy_del (EV_A_ w);
2548 infy_add (EV_A_ w); 4352 infy_add (EV_A_ w);
2549 ev_stat_stat (EV_A_ w); /* avoid race... */ 4353 ev_stat_stat (EV_A_ w); /* avoid race... */
4354 }
2550 #endif 4355 #endif
2551 4356
2552 ev_feed_event (EV_A_ w, EV_STAT); 4357 ev_feed_event (EV_A_ w, EV_STAT);
2553 } 4358 }
2554} 4359}
2555 4360
2556void 4361void
2557ev_stat_start (EV_P_ ev_stat *w) 4362ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2558{ 4363{
2559 if (expect_false (ev_is_active (w))) 4364 if (expect_false (ev_is_active (w)))
2560 return; 4365 return;
2561 4366
2562 /* since we use memcmp, we need to clear any padding data etc. */
2563 memset (&w->prev, 0, sizeof (ev_statdata));
2564 memset (&w->attr, 0, sizeof (ev_statdata));
2565
2566 ev_stat_stat (EV_A_ w); 4367 ev_stat_stat (EV_A_ w);
2567 4368
4369 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2568 if (w->interval < MIN_STAT_INTERVAL) 4370 w->interval = MIN_STAT_INTERVAL;
2569 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2570 4371
2571 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4372 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2572 ev_set_priority (&w->timer, ev_priority (w)); 4373 ev_set_priority (&w->timer, ev_priority (w));
2573 4374
2574#if EV_USE_INOTIFY 4375#if EV_USE_INOTIFY
2575 infy_init (EV_A); 4376 infy_init (EV_A);
2576 4377
2577 if (fs_fd >= 0) 4378 if (fs_fd >= 0)
2578 infy_add (EV_A_ w); 4379 infy_add (EV_A_ w);
2579 else 4380 else
2580#endif 4381#endif
4382 {
2581 ev_timer_start (EV_A_ &w->timer); 4383 ev_timer_again (EV_A_ &w->timer);
4384 ev_unref (EV_A);
4385 }
2582 4386
2583 ev_start (EV_A_ (W)w, 1); 4387 ev_start (EV_A_ (W)w, 1);
2584 4388
2585 EV_FREQUENT_CHECK; 4389 EV_FREQUENT_CHECK;
2586} 4390}
2587 4391
2588void 4392void
2589ev_stat_stop (EV_P_ ev_stat *w) 4393ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2590{ 4394{
2591 clear_pending (EV_A_ (W)w); 4395 clear_pending (EV_A_ (W)w);
2592 if (expect_false (!ev_is_active (w))) 4396 if (expect_false (!ev_is_active (w)))
2593 return; 4397 return;
2594 4398
2595 EV_FREQUENT_CHECK; 4399 EV_FREQUENT_CHECK;
2596 4400
2597#if EV_USE_INOTIFY 4401#if EV_USE_INOTIFY
2598 infy_del (EV_A_ w); 4402 infy_del (EV_A_ w);
2599#endif 4403#endif
4404
4405 if (ev_is_active (&w->timer))
4406 {
4407 ev_ref (EV_A);
2600 ev_timer_stop (EV_A_ &w->timer); 4408 ev_timer_stop (EV_A_ &w->timer);
4409 }
2601 4410
2602 ev_stop (EV_A_ (W)w); 4411 ev_stop (EV_A_ (W)w);
2603 4412
2604 EV_FREQUENT_CHECK; 4413 EV_FREQUENT_CHECK;
2605} 4414}
2606#endif 4415#endif
2607 4416
2608#if EV_IDLE_ENABLE 4417#if EV_IDLE_ENABLE
2609void 4418void
2610ev_idle_start (EV_P_ ev_idle *w) 4419ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2611{ 4420{
2612 if (expect_false (ev_is_active (w))) 4421 if (expect_false (ev_is_active (w)))
2613 return; 4422 return;
2614 4423
2615 pri_adjust (EV_A_ (W)w); 4424 pri_adjust (EV_A_ (W)w);
… …
2628 4437
2629 EV_FREQUENT_CHECK; 4438 EV_FREQUENT_CHECK;
2630} 4439}
2631 4440
2632void 4441void
2633ev_idle_stop (EV_P_ ev_idle *w) 4442ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2634{ 4443{
2635 clear_pending (EV_A_ (W)w); 4444 clear_pending (EV_A_ (W)w);
2636 if (expect_false (!ev_is_active (w))) 4445 if (expect_false (!ev_is_active (w)))
2637 return; 4446 return;
2638 4447
… …
2650 4459
2651 EV_FREQUENT_CHECK; 4460 EV_FREQUENT_CHECK;
2652} 4461}
2653#endif 4462#endif
2654 4463
4464#if EV_PREPARE_ENABLE
2655void 4465void
2656ev_prepare_start (EV_P_ ev_prepare *w) 4466ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2657{ 4467{
2658 if (expect_false (ev_is_active (w))) 4468 if (expect_false (ev_is_active (w)))
2659 return; 4469 return;
2660 4470
2661 EV_FREQUENT_CHECK; 4471 EV_FREQUENT_CHECK;
… …
2666 4476
2667 EV_FREQUENT_CHECK; 4477 EV_FREQUENT_CHECK;
2668} 4478}
2669 4479
2670void 4480void
2671ev_prepare_stop (EV_P_ ev_prepare *w) 4481ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2672{ 4482{
2673 clear_pending (EV_A_ (W)w); 4483 clear_pending (EV_A_ (W)w);
2674 if (expect_false (!ev_is_active (w))) 4484 if (expect_false (!ev_is_active (w)))
2675 return; 4485 return;
2676 4486
… …
2685 4495
2686 ev_stop (EV_A_ (W)w); 4496 ev_stop (EV_A_ (W)w);
2687 4497
2688 EV_FREQUENT_CHECK; 4498 EV_FREQUENT_CHECK;
2689} 4499}
4500#endif
2690 4501
4502#if EV_CHECK_ENABLE
2691void 4503void
2692ev_check_start (EV_P_ ev_check *w) 4504ev_check_start (EV_P_ ev_check *w) EV_THROW
2693{ 4505{
2694 if (expect_false (ev_is_active (w))) 4506 if (expect_false (ev_is_active (w)))
2695 return; 4507 return;
2696 4508
2697 EV_FREQUENT_CHECK; 4509 EV_FREQUENT_CHECK;
… …
2702 4514
2703 EV_FREQUENT_CHECK; 4515 EV_FREQUENT_CHECK;
2704} 4516}
2705 4517
2706void 4518void
2707ev_check_stop (EV_P_ ev_check *w) 4519ev_check_stop (EV_P_ ev_check *w) EV_THROW
2708{ 4520{
2709 clear_pending (EV_A_ (W)w); 4521 clear_pending (EV_A_ (W)w);
2710 if (expect_false (!ev_is_active (w))) 4522 if (expect_false (!ev_is_active (w)))
2711 return; 4523 return;
2712 4524
… …
2721 4533
2722 ev_stop (EV_A_ (W)w); 4534 ev_stop (EV_A_ (W)w);
2723 4535
2724 EV_FREQUENT_CHECK; 4536 EV_FREQUENT_CHECK;
2725} 4537}
4538#endif
2726 4539
2727#if EV_EMBED_ENABLE 4540#if EV_EMBED_ENABLE
2728void noinline 4541void noinline
2729ev_embed_sweep (EV_P_ ev_embed *w) 4542ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2730{ 4543{
2731 ev_loop (w->other, EVLOOP_NONBLOCK); 4544 ev_run (w->other, EVRUN_NOWAIT);
2732} 4545}
2733 4546
2734static void 4547static void
2735embed_io_cb (EV_P_ ev_io *io, int revents) 4548embed_io_cb (EV_P_ ev_io *io, int revents)
2736{ 4549{
2737 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4550 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2738 4551
2739 if (ev_cb (w)) 4552 if (ev_cb (w))
2740 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4553 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2741 else 4554 else
2742 ev_loop (w->other, EVLOOP_NONBLOCK); 4555 ev_run (w->other, EVRUN_NOWAIT);
2743} 4556}
2744 4557
2745static void 4558static void
2746embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4559embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2747{ 4560{
2748 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4561 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2749 4562
2750 { 4563 {
2751 struct ev_loop *loop = w->other; 4564 EV_P = w->other;
2752 4565
2753 while (fdchangecnt) 4566 while (fdchangecnt)
2754 { 4567 {
2755 fd_reify (EV_A); 4568 fd_reify (EV_A);
2756 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4569 ev_run (EV_A_ EVRUN_NOWAIT);
2757 } 4570 }
2758 } 4571 }
4572}
4573
4574static void
4575embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4576{
4577 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4578
4579 ev_embed_stop (EV_A_ w);
4580
4581 {
4582 EV_P = w->other;
4583
4584 ev_loop_fork (EV_A);
4585 ev_run (EV_A_ EVRUN_NOWAIT);
4586 }
4587
4588 ev_embed_start (EV_A_ w);
2759} 4589}
2760 4590
2761#if 0 4591#if 0
2762static void 4592static void
2763embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4593embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2765 ev_idle_stop (EV_A_ idle); 4595 ev_idle_stop (EV_A_ idle);
2766} 4596}
2767#endif 4597#endif
2768 4598
2769void 4599void
2770ev_embed_start (EV_P_ ev_embed *w) 4600ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2771{ 4601{
2772 if (expect_false (ev_is_active (w))) 4602 if (expect_false (ev_is_active (w)))
2773 return; 4603 return;
2774 4604
2775 { 4605 {
2776 struct ev_loop *loop = w->other; 4606 EV_P = w->other;
2777 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4607 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2778 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4608 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2779 } 4609 }
2780 4610
2781 EV_FREQUENT_CHECK; 4611 EV_FREQUENT_CHECK;
2782 4612
… …
2785 4615
2786 ev_prepare_init (&w->prepare, embed_prepare_cb); 4616 ev_prepare_init (&w->prepare, embed_prepare_cb);
2787 ev_set_priority (&w->prepare, EV_MINPRI); 4617 ev_set_priority (&w->prepare, EV_MINPRI);
2788 ev_prepare_start (EV_A_ &w->prepare); 4618 ev_prepare_start (EV_A_ &w->prepare);
2789 4619
4620 ev_fork_init (&w->fork, embed_fork_cb);
4621 ev_fork_start (EV_A_ &w->fork);
4622
2790 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4623 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2791 4624
2792 ev_start (EV_A_ (W)w, 1); 4625 ev_start (EV_A_ (W)w, 1);
2793 4626
2794 EV_FREQUENT_CHECK; 4627 EV_FREQUENT_CHECK;
2795} 4628}
2796 4629
2797void 4630void
2798ev_embed_stop (EV_P_ ev_embed *w) 4631ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2799{ 4632{
2800 clear_pending (EV_A_ (W)w); 4633 clear_pending (EV_A_ (W)w);
2801 if (expect_false (!ev_is_active (w))) 4634 if (expect_false (!ev_is_active (w)))
2802 return; 4635 return;
2803 4636
2804 EV_FREQUENT_CHECK; 4637 EV_FREQUENT_CHECK;
2805 4638
2806 ev_io_stop (EV_A_ &w->io); 4639 ev_io_stop (EV_A_ &w->io);
2807 ev_prepare_stop (EV_A_ &w->prepare); 4640 ev_prepare_stop (EV_A_ &w->prepare);
4641 ev_fork_stop (EV_A_ &w->fork);
2808 4642
2809 ev_stop (EV_A_ (W)w); 4643 ev_stop (EV_A_ (W)w);
2810 4644
2811 EV_FREQUENT_CHECK; 4645 EV_FREQUENT_CHECK;
2812} 4646}
2813#endif 4647#endif
2814 4648
2815#if EV_FORK_ENABLE 4649#if EV_FORK_ENABLE
2816void 4650void
2817ev_fork_start (EV_P_ ev_fork *w) 4651ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2818{ 4652{
2819 if (expect_false (ev_is_active (w))) 4653 if (expect_false (ev_is_active (w)))
2820 return; 4654 return;
2821 4655
2822 EV_FREQUENT_CHECK; 4656 EV_FREQUENT_CHECK;
… …
2827 4661
2828 EV_FREQUENT_CHECK; 4662 EV_FREQUENT_CHECK;
2829} 4663}
2830 4664
2831void 4665void
2832ev_fork_stop (EV_P_ ev_fork *w) 4666ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2833{ 4667{
2834 clear_pending (EV_A_ (W)w); 4668 clear_pending (EV_A_ (W)w);
2835 if (expect_false (!ev_is_active (w))) 4669 if (expect_false (!ev_is_active (w)))
2836 return; 4670 return;
2837 4671
… …
2848 4682
2849 EV_FREQUENT_CHECK; 4683 EV_FREQUENT_CHECK;
2850} 4684}
2851#endif 4685#endif
2852 4686
4687#if EV_CLEANUP_ENABLE
4688void
4689ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4690{
4691 if (expect_false (ev_is_active (w)))
4692 return;
4693
4694 EV_FREQUENT_CHECK;
4695
4696 ev_start (EV_A_ (W)w, ++cleanupcnt);
4697 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4698 cleanups [cleanupcnt - 1] = w;
4699
4700 /* cleanup watchers should never keep a refcount on the loop */
4701 ev_unref (EV_A);
4702 EV_FREQUENT_CHECK;
4703}
4704
4705void
4706ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4707{
4708 clear_pending (EV_A_ (W)w);
4709 if (expect_false (!ev_is_active (w)))
4710 return;
4711
4712 EV_FREQUENT_CHECK;
4713 ev_ref (EV_A);
4714
4715 {
4716 int active = ev_active (w);
4717
4718 cleanups [active - 1] = cleanups [--cleanupcnt];
4719 ev_active (cleanups [active - 1]) = active;
4720 }
4721
4722 ev_stop (EV_A_ (W)w);
4723
4724 EV_FREQUENT_CHECK;
4725}
4726#endif
4727
2853#if EV_ASYNC_ENABLE 4728#if EV_ASYNC_ENABLE
2854void 4729void
2855ev_async_start (EV_P_ ev_async *w) 4730ev_async_start (EV_P_ ev_async *w) EV_THROW
2856{ 4731{
2857 if (expect_false (ev_is_active (w))) 4732 if (expect_false (ev_is_active (w)))
2858 return; 4733 return;
4734
4735 w->sent = 0;
2859 4736
2860 evpipe_init (EV_A); 4737 evpipe_init (EV_A);
2861 4738
2862 EV_FREQUENT_CHECK; 4739 EV_FREQUENT_CHECK;
2863 4740
… …
2867 4744
2868 EV_FREQUENT_CHECK; 4745 EV_FREQUENT_CHECK;
2869} 4746}
2870 4747
2871void 4748void
2872ev_async_stop (EV_P_ ev_async *w) 4749ev_async_stop (EV_P_ ev_async *w) EV_THROW
2873{ 4750{
2874 clear_pending (EV_A_ (W)w); 4751 clear_pending (EV_A_ (W)w);
2875 if (expect_false (!ev_is_active (w))) 4752 if (expect_false (!ev_is_active (w)))
2876 return; 4753 return;
2877 4754
… …
2888 4765
2889 EV_FREQUENT_CHECK; 4766 EV_FREQUENT_CHECK;
2890} 4767}
2891 4768
2892void 4769void
2893ev_async_send (EV_P_ ev_async *w) 4770ev_async_send (EV_P_ ev_async *w) EV_THROW
2894{ 4771{
2895 w->sent = 1; 4772 w->sent = 1;
2896 evpipe_write (EV_A_ &gotasync); 4773 evpipe_write (EV_A_ &async_pending);
2897} 4774}
2898#endif 4775#endif
2899 4776
2900/*****************************************************************************/ 4777/*****************************************************************************/
2901 4778
… …
2911once_cb (EV_P_ struct ev_once *once, int revents) 4788once_cb (EV_P_ struct ev_once *once, int revents)
2912{ 4789{
2913 void (*cb)(int revents, void *arg) = once->cb; 4790 void (*cb)(int revents, void *arg) = once->cb;
2914 void *arg = once->arg; 4791 void *arg = once->arg;
2915 4792
2916 ev_io_stop (EV_A_ &once->io); 4793 ev_io_stop (EV_A_ &once->io);
2917 ev_timer_stop (EV_A_ &once->to); 4794 ev_timer_stop (EV_A_ &once->to);
2918 ev_free (once); 4795 ev_free (once);
2919 4796
2920 cb (revents, arg); 4797 cb (revents, arg);
2921} 4798}
2922 4799
2923static void 4800static void
2924once_cb_io (EV_P_ ev_io *w, int revents) 4801once_cb_io (EV_P_ ev_io *w, int revents)
2925{ 4802{
2926 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4803 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4804
4805 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2927} 4806}
2928 4807
2929static void 4808static void
2930once_cb_to (EV_P_ ev_timer *w, int revents) 4809once_cb_to (EV_P_ ev_timer *w, int revents)
2931{ 4810{
2932 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4811 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4812
4813 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2933} 4814}
2934 4815
2935void 4816void
2936ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4817ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
2937{ 4818{
2938 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4819 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2939 4820
2940 if (expect_false (!once)) 4821 if (expect_false (!once))
2941 { 4822 {
2942 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4823 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2943 return; 4824 return;
2944 } 4825 }
2945 4826
2946 once->cb = cb; 4827 once->cb = cb;
2947 once->arg = arg; 4828 once->arg = arg;
… …
2959 ev_timer_set (&once->to, timeout, 0.); 4840 ev_timer_set (&once->to, timeout, 0.);
2960 ev_timer_start (EV_A_ &once->to); 4841 ev_timer_start (EV_A_ &once->to);
2961 } 4842 }
2962} 4843}
2963 4844
4845/*****************************************************************************/
4846
4847#if EV_WALK_ENABLE
4848void ecb_cold
4849ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4850{
4851 int i, j;
4852 ev_watcher_list *wl, *wn;
4853
4854 if (types & (EV_IO | EV_EMBED))
4855 for (i = 0; i < anfdmax; ++i)
4856 for (wl = anfds [i].head; wl; )
4857 {
4858 wn = wl->next;
4859
4860#if EV_EMBED_ENABLE
4861 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4862 {
4863 if (types & EV_EMBED)
4864 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4865 }
4866 else
4867#endif
4868#if EV_USE_INOTIFY
4869 if (ev_cb ((ev_io *)wl) == infy_cb)
4870 ;
4871 else
4872#endif
4873 if ((ev_io *)wl != &pipe_w)
4874 if (types & EV_IO)
4875 cb (EV_A_ EV_IO, wl);
4876
4877 wl = wn;
4878 }
4879
4880 if (types & (EV_TIMER | EV_STAT))
4881 for (i = timercnt + HEAP0; i-- > HEAP0; )
4882#if EV_STAT_ENABLE
4883 /*TODO: timer is not always active*/
4884 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4885 {
4886 if (types & EV_STAT)
4887 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4888 }
4889 else
4890#endif
4891 if (types & EV_TIMER)
4892 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4893
4894#if EV_PERIODIC_ENABLE
4895 if (types & EV_PERIODIC)
4896 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4897 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4898#endif
4899
4900#if EV_IDLE_ENABLE
4901 if (types & EV_IDLE)
4902 for (j = NUMPRI; j--; )
4903 for (i = idlecnt [j]; i--; )
4904 cb (EV_A_ EV_IDLE, idles [j][i]);
4905#endif
4906
4907#if EV_FORK_ENABLE
4908 if (types & EV_FORK)
4909 for (i = forkcnt; i--; )
4910 if (ev_cb (forks [i]) != embed_fork_cb)
4911 cb (EV_A_ EV_FORK, forks [i]);
4912#endif
4913
4914#if EV_ASYNC_ENABLE
4915 if (types & EV_ASYNC)
4916 for (i = asynccnt; i--; )
4917 cb (EV_A_ EV_ASYNC, asyncs [i]);
4918#endif
4919
4920#if EV_PREPARE_ENABLE
4921 if (types & EV_PREPARE)
4922 for (i = preparecnt; i--; )
4923# if EV_EMBED_ENABLE
4924 if (ev_cb (prepares [i]) != embed_prepare_cb)
4925# endif
4926 cb (EV_A_ EV_PREPARE, prepares [i]);
4927#endif
4928
4929#if EV_CHECK_ENABLE
4930 if (types & EV_CHECK)
4931 for (i = checkcnt; i--; )
4932 cb (EV_A_ EV_CHECK, checks [i]);
4933#endif
4934
4935#if EV_SIGNAL_ENABLE
4936 if (types & EV_SIGNAL)
4937 for (i = 0; i < EV_NSIG - 1; ++i)
4938 for (wl = signals [i].head; wl; )
4939 {
4940 wn = wl->next;
4941 cb (EV_A_ EV_SIGNAL, wl);
4942 wl = wn;
4943 }
4944#endif
4945
4946#if EV_CHILD_ENABLE
4947 if (types & EV_CHILD)
4948 for (i = (EV_PID_HASHSIZE); i--; )
4949 for (wl = childs [i]; wl; )
4950 {
4951 wn = wl->next;
4952 cb (EV_A_ EV_CHILD, wl);
4953 wl = wn;
4954 }
4955#endif
4956/* EV_STAT 0x00001000 /* stat data changed */
4957/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4958}
4959#endif
4960
2964#if EV_MULTIPLICITY 4961#if EV_MULTIPLICITY
2965 #include "ev_wrap.h" 4962 #include "ev_wrap.h"
2966#endif 4963#endif
2967 4964
2968#ifdef __cplusplus
2969}
2970#endif
2971

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