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Comparing libev/ev.c (file contents):
Revision 1.285 by root, Wed Apr 15 19:35:53 2009 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
62# endif 66# endif
63 67
64# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
… …
75# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
77# endif 81# endif
78# endif 82# endif
79 83
84# if HAVE_NANOSLEEP
80# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
83# else 88# else
89# undef EV_USE_NANOSLEEP
84# 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
85# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
86# endif 100# endif
87 101
102# if HAVE_POLL && HAVE_POLL_H
88# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
89# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif 105# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else 106# else
107# undef EV_USE_POLL
100# define EV_USE_POLL 0 108# define EV_USE_POLL 0
101# endif
102# endif 109# endif
103 110
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
107# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# define EV_USE_EPOLL 0
109# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
110# endif 118# endif
111 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
112# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
118# endif 127# endif
119 128
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
123# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
124# define EV_USE_PORT 0
125# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
126# endif 136# endif
127 137
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
131# else
132# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
133# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
134# endif 145# endif
135 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
136# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
137# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
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
142# endif 163# endif
143 164
144#endif 165#endif
145 166
146#include <math.h>
147#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
148#include <fcntl.h> 169#include <fcntl.h>
149#include <stddef.h> 170#include <stddef.h>
150 171
151#include <stdio.h> 172#include <stdio.h>
152 173
153#include <assert.h> 174#include <assert.h>
154#include <errno.h> 175#include <errno.h>
155#include <sys/types.h> 176#include <sys/types.h>
156#include <time.h> 177#include <time.h>
178#include <limits.h>
157 179
158#include <signal.h> 180#include <signal.h>
159 181
160#ifdef EV_H 182#ifdef EV_H
161# include EV_H 183# include EV_H
162#else 184#else
163# include "ev.h" 185# include "ev.h"
164#endif 186#endif
187
188EV_CPP(extern "C" {)
165 189
166#ifndef _WIN32 190#ifndef _WIN32
167# include <sys/time.h> 191# include <sys/time.h>
168# include <sys/wait.h> 192# include <sys/wait.h>
169# include <unistd.h> 193# include <unistd.h>
… …
172# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
173# include <windows.h> 197# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
176# endif 200# endif
201# undef EV_AVOID_STDIO
177#endif 202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
178 211
179/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
180 245
181#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
184# else 249# else
185# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
186# endif 251# endif
187#endif 252#endif
188 253
189#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1 256# define EV_USE_MONOTONIC EV_FEATURE_OS
192# else 257# else
193# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
194# endif 259# endif
195#endif 260#endif
196 261
… …
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif 264#endif
200 265
201#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L 267# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1 268# define EV_USE_NANOSLEEP EV_FEATURE_OS
204# else 269# else
205# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
206# endif 271# endif
207#endif 272#endif
208 273
209#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
211#endif 276#endif
212 277
213#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
214# ifdef _WIN32 279# ifdef _WIN32
215# define EV_USE_POLL 0 280# define EV_USE_POLL 0
216# else 281# else
217# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
218# endif 283# endif
219#endif 284#endif
220 285
221#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
224# else 289# else
225# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
226# endif 291# endif
227#endif 292#endif
228 293
… …
234# define EV_USE_PORT 0 299# define EV_USE_PORT 0
235#endif 300#endif
236 301
237#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
240# else 305# else
241# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
242# endif 307# endif
243#endif 308#endif
244 309
245#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif 312#endif
252 313
253#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif 316#endif
260 317
261#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
264# else 321# else
265# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
323# endif
324#endif
325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
266# endif 331# endif
267#endif 332#endif
268 333
269#if 0 /* debugging */ 334#if 0 /* debugging */
270# define EV_VERIFY 3 335# define EV_VERIFY 3
271# define EV_USE_4HEAP 1 336# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1 337# define EV_HEAP_CACHE_AT 1
273#endif 338#endif
274 339
275#ifndef EV_VERIFY 340#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL 341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
277#endif 342#endif
278 343
279#ifndef EV_USE_4HEAP 344#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL 345# define EV_USE_4HEAP EV_FEATURE_DATA
281#endif 346#endif
282 347
283#ifndef EV_HEAP_CACHE_AT 348#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL 349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
285#endif 364#endif
286 365
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
288 373
289#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
291# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
292#endif 377#endif
… …
300# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
302#endif 387#endif
303 388
304#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
305# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
306# include <sys/select.h> 392# include <sys/select.h>
307# endif 393# endif
308#endif 394#endif
309 395
310#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h> 397# include <sys/statfs.h>
313# include <sys/inotify.h> 398# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
320 405
321#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h> 407# include <winsock.h>
323#endif 408#endif
324 409
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD 410#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h> 412# include <stdint.h>
337# ifdef __cplusplus 413# ifndef EFD_NONBLOCK
338extern "C" { 414# define EFD_NONBLOCK O_NONBLOCK
339# endif 415# endif
340int eventfd (unsigned int initval, int flags); 416# ifndef EFD_CLOEXEC
341# ifdef __cplusplus 417# ifdef O_CLOEXEC
342} 418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
343# endif 422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
344#endif 446#endif
345 447
346/**/ 448/**/
347 449
348#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
350#else 452#else
351# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
352#endif 454#endif
353 455
354/* 456/*
355 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */ 459 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
363 462
364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367 465
368#if __GNUC__ >= 4 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
369# define expect(expr,value) __builtin_expect ((expr),(value)) 467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
370# define noinline __attribute__ ((noinline)) 468
469/* the following are taken from libecb */
470/* ecb.h start */
471
472/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers.
475 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place.
478 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
481 #define ECB_GCC_VERSION(major,minor) 0
482 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif
485#endif
486
487#if __cplusplus
488 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__
491#elif ECB_C99
492 #define ecb_inline static inline
371#else 493#else
372# define expect(expr,value) (expr) 494 #define ecb_inline static
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif 495#endif
496
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5)
499 #if __x86
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
503 #elif __amd64
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
377#endif 508 #endif
509#endif
378 510
511#ifndef ECB_MEMORY_FENCE
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */
517 #define ECB_MEMORY_FENCE do { } while (0)
518 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
519 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
520 #elif defined(_WIN32)
521 #include <WinNT.h>
522 #define ECB_MEMORY_FENCE MemoryBarrier ()
523 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
524 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
525 #endif
526#endif
527
528#ifndef ECB_MEMORY_FENCE
529 #include <pthread.h>
530
531 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
532 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
533 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
534 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
535#endif
536
537#if ECB_GCC_VERSION(3,1)
538 #define ecb_attribute(attrlist) __attribute__(attrlist)
539 #define ecb_is_constant(expr) __builtin_constant_p (expr)
540 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
541 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
542#else
543 #define ecb_attribute(attrlist)
544 #define ecb_is_constant(expr) 0
545 #define ecb_expect(expr,value) (expr)
546 #define ecb_prefetch(addr,rw,locality)
547#endif
548
549#define ecb_noinline ecb_attribute ((__noinline__))
550#define ecb_noreturn ecb_attribute ((__noreturn__))
551#define ecb_unused ecb_attribute ((__unused__))
552#define ecb_const ecb_attribute ((__const__))
553#define ecb_pure ecb_attribute ((__pure__))
554
555#if ECB_GCC_VERSION(4,3)
556 #define ecb_artificial ecb_attribute ((__artificial__))
557 #define ecb_hot ecb_attribute ((__hot__))
558 #define ecb_cold ecb_attribute ((__cold__))
559#else
560 #define ecb_artificial
561 #define ecb_hot
562 #define ecb_cold
563#endif
564
565/* put around conditional expressions if you are very sure that the */
566/* expression is mostly true or mostly false. note that these return */
567/* booleans, not the expression. */
379#define expect_false(expr) expect ((expr) != 0, 0) 568#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
380#define expect_true(expr) expect ((expr) != 0, 1) 569#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
570/* ecb.h end */
571
572#define expect_false(cond) ecb_expect_false (cond)
573#define expect_true(cond) ecb_expect_true (cond)
574#define noinline ecb_noinline
575
381#define inline_size static inline 576#define inline_size ecb_inline
382 577
383#if EV_MINIMAL 578#if EV_FEATURE_CODE
579# define inline_speed ecb_inline
580#else
384# define inline_speed static noinline 581# define inline_speed static noinline
582#endif
583
584#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
585
586#if EV_MINPRI == EV_MAXPRI
587# define ABSPRI(w) (((W)w), 0)
385#else 588#else
386# define inline_speed static inline
387#endif
388
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 589# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
590#endif
391 591
392#define EMPTY /* required for microsofts broken pseudo-c compiler */ 592#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */ 593#define EMPTY2(a,b) /* used to suppress some warnings */
394 594
395typedef ev_watcher *W; 595typedef ev_watcher *W;
… …
399#define ev_active(w) ((W)(w))->active 599#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at 600#define ev_at(w) ((WT)(w))->at
401 601
402#if EV_USE_REALTIME 602#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 603/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */ 604/* giving it a reasonably high chance of working on typical architectures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 605static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif 606#endif
407 607
408#if EV_USE_MONOTONIC 608#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 609static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif 610#endif
411 611
612#ifndef EV_FD_TO_WIN32_HANDLE
613# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
614#endif
615#ifndef EV_WIN32_HANDLE_TO_FD
616# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
617#endif
618#ifndef EV_WIN32_CLOSE_FD
619# define EV_WIN32_CLOSE_FD(fd) close (fd)
620#endif
621
412#ifdef _WIN32 622#ifdef _WIN32
413# include "ev_win32.c" 623# include "ev_win32.c"
414#endif 624#endif
415 625
416/*****************************************************************************/ 626/*****************************************************************************/
417 627
628/* define a suitable floor function (only used by periodics atm) */
629
630#if EV_USE_FLOOR
631# include <math.h>
632# define ev_floor(v) floor (v)
633#else
634
635#include <float.h>
636
637/* a floor() replacement function, should be independent of ev_tstamp type */
638static ev_tstamp noinline
639ev_floor (ev_tstamp v)
640{
641 /* the choice of shift factor is not terribly important */
642#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
643 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
644#else
645 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
646#endif
647
648 /* argument too large for an unsigned long? */
649 if (expect_false (v >= shift))
650 {
651 ev_tstamp f;
652
653 if (v == v - 1.)
654 return v; /* very large number */
655
656 f = shift * ev_floor (v * (1. / shift));
657 return f + ev_floor (v - f);
658 }
659
660 /* special treatment for negative args? */
661 if (expect_false (v < 0.))
662 {
663 ev_tstamp f = -ev_floor (-v);
664
665 return f - (f == v ? 0 : 1);
666 }
667
668 /* fits into an unsigned long */
669 return (unsigned long)v;
670}
671
672#endif
673
674/*****************************************************************************/
675
676#ifdef __linux
677# include <sys/utsname.h>
678#endif
679
680static unsigned int noinline ecb_cold
681ev_linux_version (void)
682{
683#ifdef __linux
684 unsigned int v = 0;
685 struct utsname buf;
686 int i;
687 char *p = buf.release;
688
689 if (uname (&buf))
690 return 0;
691
692 for (i = 3+1; --i; )
693 {
694 unsigned int c = 0;
695
696 for (;;)
697 {
698 if (*p >= '0' && *p <= '9')
699 c = c * 10 + *p++ - '0';
700 else
701 {
702 p += *p == '.';
703 break;
704 }
705 }
706
707 v = (v << 8) | c;
708 }
709
710 return v;
711#else
712 return 0;
713#endif
714}
715
716/*****************************************************************************/
717
718#if EV_AVOID_STDIO
719static void noinline ecb_cold
720ev_printerr (const char *msg)
721{
722 write (STDERR_FILENO, msg, strlen (msg));
723}
724#endif
725
418static void (*syserr_cb)(const char *msg); 726static void (*syserr_cb)(const char *msg);
419 727
420void 728void ecb_cold
421ev_set_syserr_cb (void (*cb)(const char *msg)) 729ev_set_syserr_cb (void (*cb)(const char *msg))
422{ 730{
423 syserr_cb = cb; 731 syserr_cb = cb;
424} 732}
425 733
426static void noinline 734static void noinline ecb_cold
427ev_syserr (const char *msg) 735ev_syserr (const char *msg)
428{ 736{
429 if (!msg) 737 if (!msg)
430 msg = "(libev) system error"; 738 msg = "(libev) system error";
431 739
432 if (syserr_cb) 740 if (syserr_cb)
433 syserr_cb (msg); 741 syserr_cb (msg);
434 else 742 else
435 { 743 {
744#if EV_AVOID_STDIO
745 ev_printerr (msg);
746 ev_printerr (": ");
747 ev_printerr (strerror (errno));
748 ev_printerr ("\n");
749#else
436 perror (msg); 750 perror (msg);
751#endif
437 abort (); 752 abort ();
438 } 753 }
439} 754}
440 755
441static void * 756static void *
442ev_realloc_emul (void *ptr, long size) 757ev_realloc_emul (void *ptr, long size)
443{ 758{
759#if __GLIBC__
760 return realloc (ptr, size);
761#else
444 /* some systems, notably openbsd and darwin, fail to properly 762 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and 763 * implement realloc (x, 0) (as required by both ansi c-89 and
446 * the single unix specification, so work around them here. 764 * the single unix specification, so work around them here.
447 */ 765 */
448 766
449 if (size) 767 if (size)
450 return realloc (ptr, size); 768 return realloc (ptr, size);
451 769
452 free (ptr); 770 free (ptr);
453 return 0; 771 return 0;
772#endif
454} 773}
455 774
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 775static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457 776
458void 777void ecb_cold
459ev_set_allocator (void *(*cb)(void *ptr, long size)) 778ev_set_allocator (void *(*cb)(void *ptr, long size))
460{ 779{
461 alloc = cb; 780 alloc = cb;
462} 781}
463 782
… …
466{ 785{
467 ptr = alloc (ptr, size); 786 ptr = alloc (ptr, size);
468 787
469 if (!ptr && size) 788 if (!ptr && size)
470 { 789 {
790#if EV_AVOID_STDIO
791 ev_printerr ("(libev) memory allocation failed, aborting.\n");
792#else
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 793 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
794#endif
472 abort (); 795 abort ();
473 } 796 }
474 797
475 return ptr; 798 return ptr;
476} 799}
… …
478#define ev_malloc(size) ev_realloc (0, (size)) 801#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0) 802#define ev_free(ptr) ev_realloc ((ptr), 0)
480 803
481/*****************************************************************************/ 804/*****************************************************************************/
482 805
806/* set in reify when reification needed */
807#define EV_ANFD_REIFY 1
808
809/* file descriptor info structure */
483typedef struct 810typedef struct
484{ 811{
485 WL head; 812 WL head;
486 unsigned char events; 813 unsigned char events; /* the events watched for */
487 unsigned char reify; 814 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 815 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused; 816 unsigned char unused;
490#if EV_USE_EPOLL 817#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */ 818 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif 819#endif
493#if EV_SELECT_IS_WINSOCKET 820#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
494 SOCKET handle; 821 SOCKET handle;
495#endif 822#endif
823#if EV_USE_IOCP
824 OVERLAPPED or, ow;
825#endif
496} ANFD; 826} ANFD;
497 827
828/* stores the pending event set for a given watcher */
498typedef struct 829typedef struct
499{ 830{
500 W w; 831 W w;
501 int events; 832 int events; /* the pending event set for the given watcher */
502} ANPENDING; 833} ANPENDING;
503 834
504#if EV_USE_INOTIFY 835#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */ 836/* hash table entry per inotify-id */
506typedef struct 837typedef struct
… …
509} ANFS; 840} ANFS;
510#endif 841#endif
511 842
512/* Heap Entry */ 843/* Heap Entry */
513#if EV_HEAP_CACHE_AT 844#if EV_HEAP_CACHE_AT
845 /* a heap element */
514 typedef struct { 846 typedef struct {
515 ev_tstamp at; 847 ev_tstamp at;
516 WT w; 848 WT w;
517 } ANHE; 849 } ANHE;
518 850
519 #define ANHE_w(he) (he).w /* access watcher, read-write */ 851 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */ 852 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 853 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else 854#else
855 /* a heap element */
523 typedef WT ANHE; 856 typedef WT ANHE;
524 857
525 #define ANHE_w(he) (he) 858 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at 859 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he) 860 #define ANHE_at_cache(he)
… …
551 884
552 static int ev_default_loop_ptr; 885 static int ev_default_loop_ptr;
553 886
554#endif 887#endif
555 888
889#if EV_FEATURE_API
890# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
891# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
892# define EV_INVOKE_PENDING invoke_cb (EV_A)
893#else
894# define EV_RELEASE_CB (void)0
895# define EV_ACQUIRE_CB (void)0
896# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
897#endif
898
899#define EVBREAK_RECURSE 0x80
900
556/*****************************************************************************/ 901/*****************************************************************************/
557 902
903#ifndef EV_HAVE_EV_TIME
558ev_tstamp 904ev_tstamp
559ev_time (void) 905ev_time (void)
560{ 906{
561#if EV_USE_REALTIME 907#if EV_USE_REALTIME
562 if (expect_true (have_realtime)) 908 if (expect_true (have_realtime))
… …
569 915
570 struct timeval tv; 916 struct timeval tv;
571 gettimeofday (&tv, 0); 917 gettimeofday (&tv, 0);
572 return tv.tv_sec + tv.tv_usec * 1e-6; 918 return tv.tv_sec + tv.tv_usec * 1e-6;
573} 919}
920#endif
574 921
575inline_size ev_tstamp 922inline_size ev_tstamp
576get_clock (void) 923get_clock (void)
577{ 924{
578#if EV_USE_MONOTONIC 925#if EV_USE_MONOTONIC
… …
601 if (delay > 0.) 948 if (delay > 0.)
602 { 949 {
603#if EV_USE_NANOSLEEP 950#if EV_USE_NANOSLEEP
604 struct timespec ts; 951 struct timespec ts;
605 952
606 ts.tv_sec = (time_t)delay; 953 EV_TS_SET (ts, delay);
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0); 954 nanosleep (&ts, 0);
610#elif defined(_WIN32) 955#elif defined(_WIN32)
611 Sleep ((unsigned long)(delay * 1e3)); 956 Sleep ((unsigned long)(delay * 1e3));
612#else 957#else
613 struct timeval tv; 958 struct timeval tv;
614 959
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 960 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 961 /* something not guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */ 962 /* by older ones */
963 EV_TV_SET (tv, delay);
621 select (0, 0, 0, 0, &tv); 964 select (0, 0, 0, 0, &tv);
622#endif 965#endif
623 } 966 }
624} 967}
625 968
626/*****************************************************************************/ 969/*****************************************************************************/
627 970
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 971#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629 972
973/* find a suitable new size for the given array, */
974/* hopefully by rounding to a nice-to-malloc size */
630inline_size int 975inline_size int
631array_nextsize (int elem, int cur, int cnt) 976array_nextsize (int elem, int cur, int cnt)
632{ 977{
633 int ncur = cur + 1; 978 int ncur = cur + 1;
634 979
… …
646 } 991 }
647 992
648 return ncur; 993 return ncur;
649} 994}
650 995
651static noinline void * 996static void * noinline ecb_cold
652array_realloc (int elem, void *base, int *cur, int cnt) 997array_realloc (int elem, void *base, int *cur, int cnt)
653{ 998{
654 *cur = array_nextsize (elem, *cur, cnt); 999 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur); 1000 return ev_realloc (base, elem * *cur);
656} 1001}
… …
659 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1004 memset ((void *)(base), 0, sizeof (*(base)) * (count))
660 1005
661#define array_needsize(type,base,cur,cnt,init) \ 1006#define array_needsize(type,base,cur,cnt,init) \
662 if (expect_false ((cnt) > (cur))) \ 1007 if (expect_false ((cnt) > (cur))) \
663 { \ 1008 { \
664 int ocur_ = (cur); \ 1009 int ecb_unused ocur_ = (cur); \
665 (base) = (type *)array_realloc \ 1010 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \ 1011 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \ 1012 init ((base) + (ocur_), (cur) - ocur_); \
668 } 1013 }
669 1014
… …
680#define array_free(stem, idx) \ 1025#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 1026 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682 1027
683/*****************************************************************************/ 1028/*****************************************************************************/
684 1029
1030/* dummy callback for pending events */
1031static void noinline
1032pendingcb (EV_P_ ev_prepare *w, int revents)
1033{
1034}
1035
685void noinline 1036void noinline
686ev_feed_event (EV_P_ void *w, int revents) 1037ev_feed_event (EV_P_ void *w, int revents)
687{ 1038{
688 W w_ = (W)w; 1039 W w_ = (W)w;
689 int pri = ABSPRI (w_); 1040 int pri = ABSPRI (w_);
… …
724} 1075}
725 1076
726/*****************************************************************************/ 1077/*****************************************************************************/
727 1078
728inline_speed void 1079inline_speed void
729fd_event (EV_P_ int fd, int revents) 1080fd_event_nocheck (EV_P_ int fd, int revents)
730{ 1081{
731 ANFD *anfd = anfds + fd; 1082 ANFD *anfd = anfds + fd;
732 ev_io *w; 1083 ev_io *w;
733 1084
734 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1085 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
738 if (ev) 1089 if (ev)
739 ev_feed_event (EV_A_ (W)w, ev); 1090 ev_feed_event (EV_A_ (W)w, ev);
740 } 1091 }
741} 1092}
742 1093
1094/* do not submit kernel events for fds that have reify set */
1095/* because that means they changed while we were polling for new events */
1096inline_speed void
1097fd_event (EV_P_ int fd, int revents)
1098{
1099 ANFD *anfd = anfds + fd;
1100
1101 if (expect_true (!anfd->reify))
1102 fd_event_nocheck (EV_A_ fd, revents);
1103}
1104
743void 1105void
744ev_feed_fd_event (EV_P_ int fd, int revents) 1106ev_feed_fd_event (EV_P_ int fd, int revents)
745{ 1107{
746 if (fd >= 0 && fd < anfdmax) 1108 if (fd >= 0 && fd < anfdmax)
747 fd_event (EV_A_ fd, revents); 1109 fd_event_nocheck (EV_A_ fd, revents);
748} 1110}
749 1111
1112/* make sure the external fd watch events are in-sync */
1113/* with the kernel/libev internal state */
750inline_size void 1114inline_size void
751fd_reify (EV_P) 1115fd_reify (EV_P)
752{ 1116{
753 int i; 1117 int i;
1118
1119#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1120 for (i = 0; i < fdchangecnt; ++i)
1121 {
1122 int fd = fdchanges [i];
1123 ANFD *anfd = anfds + fd;
1124
1125 if (anfd->reify & EV__IOFDSET && anfd->head)
1126 {
1127 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1128
1129 if (handle != anfd->handle)
1130 {
1131 unsigned long arg;
1132
1133 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1134
1135 /* handle changed, but fd didn't - we need to do it in two steps */
1136 backend_modify (EV_A_ fd, anfd->events, 0);
1137 anfd->events = 0;
1138 anfd->handle = handle;
1139 }
1140 }
1141 }
1142#endif
754 1143
755 for (i = 0; i < fdchangecnt; ++i) 1144 for (i = 0; i < fdchangecnt; ++i)
756 { 1145 {
757 int fd = fdchanges [i]; 1146 int fd = fdchanges [i];
758 ANFD *anfd = anfds + fd; 1147 ANFD *anfd = anfds + fd;
759 ev_io *w; 1148 ev_io *w;
760 1149
761 unsigned char events = 0; 1150 unsigned char o_events = anfd->events;
1151 unsigned char o_reify = anfd->reify;
762 1152
763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1153 anfd->reify = 0;
764 events |= (unsigned char)w->events;
765 1154
766#if EV_SELECT_IS_WINSOCKET 1155 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
767 if (events)
768 { 1156 {
769 unsigned long arg; 1157 anfd->events = 0;
770 #ifdef EV_FD_TO_WIN32_HANDLE 1158
771 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1159 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
772 #else 1160 anfd->events |= (unsigned char)w->events;
773 anfd->handle = _get_osfhandle (fd); 1161
774 #endif 1162 if (o_events != anfd->events)
775 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1163 o_reify = EV__IOFDSET; /* actually |= */
776 } 1164 }
777#endif
778 1165
779 { 1166 if (o_reify & EV__IOFDSET)
780 unsigned char o_events = anfd->events;
781 unsigned char o_reify = anfd->reify;
782
783 anfd->reify = 0;
784 anfd->events = events;
785
786 if (o_events != events || o_reify & EV__IOFDSET)
787 backend_modify (EV_A_ fd, o_events, events); 1167 backend_modify (EV_A_ fd, o_events, anfd->events);
788 }
789 } 1168 }
790 1169
791 fdchangecnt = 0; 1170 fdchangecnt = 0;
792} 1171}
793 1172
1173/* something about the given fd changed */
794inline_size void 1174inline_size void
795fd_change (EV_P_ int fd, int flags) 1175fd_change (EV_P_ int fd, int flags)
796{ 1176{
797 unsigned char reify = anfds [fd].reify; 1177 unsigned char reify = anfds [fd].reify;
798 anfds [fd].reify |= flags; 1178 anfds [fd].reify |= flags;
… …
803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1183 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
804 fdchanges [fdchangecnt - 1] = fd; 1184 fdchanges [fdchangecnt - 1] = fd;
805 } 1185 }
806} 1186}
807 1187
1188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
808inline_speed void 1189inline_speed void ecb_cold
809fd_kill (EV_P_ int fd) 1190fd_kill (EV_P_ int fd)
810{ 1191{
811 ev_io *w; 1192 ev_io *w;
812 1193
813 while ((w = (ev_io *)anfds [fd].head)) 1194 while ((w = (ev_io *)anfds [fd].head))
… …
815 ev_io_stop (EV_A_ w); 1196 ev_io_stop (EV_A_ w);
816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
817 } 1198 }
818} 1199}
819 1200
1201/* check whether the given fd is actually valid, for error recovery */
820inline_size int 1202inline_size int ecb_cold
821fd_valid (int fd) 1203fd_valid (int fd)
822{ 1204{
823#ifdef _WIN32 1205#ifdef _WIN32
824 return _get_osfhandle (fd) != -1; 1206 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
825#else 1207#else
826 return fcntl (fd, F_GETFD) != -1; 1208 return fcntl (fd, F_GETFD) != -1;
827#endif 1209#endif
828} 1210}
829 1211
830/* called on EBADF to verify fds */ 1212/* called on EBADF to verify fds */
831static void noinline 1213static void noinline ecb_cold
832fd_ebadf (EV_P) 1214fd_ebadf (EV_P)
833{ 1215{
834 int fd; 1216 int fd;
835 1217
836 for (fd = 0; fd < anfdmax; ++fd) 1218 for (fd = 0; fd < anfdmax; ++fd)
… …
838 if (!fd_valid (fd) && errno == EBADF) 1220 if (!fd_valid (fd) && errno == EBADF)
839 fd_kill (EV_A_ fd); 1221 fd_kill (EV_A_ fd);
840} 1222}
841 1223
842/* called on ENOMEM in select/poll to kill some fds and retry */ 1224/* called on ENOMEM in select/poll to kill some fds and retry */
843static void noinline 1225static void noinline ecb_cold
844fd_enomem (EV_P) 1226fd_enomem (EV_P)
845{ 1227{
846 int fd; 1228 int fd;
847 1229
848 for (fd = anfdmax; fd--; ) 1230 for (fd = anfdmax; fd--; )
849 if (anfds [fd].events) 1231 if (anfds [fd].events)
850 { 1232 {
851 fd_kill (EV_A_ fd); 1233 fd_kill (EV_A_ fd);
852 return; 1234 break;
853 } 1235 }
854} 1236}
855 1237
856/* usually called after fork if backend needs to re-arm all fds from scratch */ 1238/* usually called after fork if backend needs to re-arm all fds from scratch */
857static void noinline 1239static void noinline
… …
862 for (fd = 0; fd < anfdmax; ++fd) 1244 for (fd = 0; fd < anfdmax; ++fd)
863 if (anfds [fd].events) 1245 if (anfds [fd].events)
864 { 1246 {
865 anfds [fd].events = 0; 1247 anfds [fd].events = 0;
866 anfds [fd].emask = 0; 1248 anfds [fd].emask = 0;
867 fd_change (EV_A_ fd, EV__IOFDSET | 1); 1249 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
868 } 1250 }
869} 1251}
870 1252
1253/* used to prepare libev internal fd's */
1254/* this is not fork-safe */
1255inline_speed void
1256fd_intern (int fd)
1257{
1258#ifdef _WIN32
1259 unsigned long arg = 1;
1260 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1261#else
1262 fcntl (fd, F_SETFD, FD_CLOEXEC);
1263 fcntl (fd, F_SETFL, O_NONBLOCK);
1264#endif
1265}
1266
871/*****************************************************************************/ 1267/*****************************************************************************/
872 1268
873/* 1269/*
874 * the heap functions want a real array index. array index 0 uis guaranteed to not 1270 * the heap functions want a real array index. array index 0 is guaranteed to not
875 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1271 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
876 * the branching factor of the d-tree. 1272 * the branching factor of the d-tree.
877 */ 1273 */
878 1274
879/* 1275/*
… …
947 1343
948 for (;;) 1344 for (;;)
949 { 1345 {
950 int c = k << 1; 1346 int c = k << 1;
951 1347
952 if (c > N + HEAP0 - 1) 1348 if (c >= N + HEAP0)
953 break; 1349 break;
954 1350
955 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 1351 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956 ? 1 : 0; 1352 ? 1 : 0;
957 1353
… …
989 1385
990 heap [k] = he; 1386 heap [k] = he;
991 ev_active (ANHE_w (he)) = k; 1387 ev_active (ANHE_w (he)) = k;
992} 1388}
993 1389
1390/* move an element suitably so it is in a correct place */
994inline_size void 1391inline_size void
995adjustheap (ANHE *heap, int N, int k) 1392adjustheap (ANHE *heap, int N, int k)
996{ 1393{
997 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 1394 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
998 upheap (heap, k); 1395 upheap (heap, k);
999 else 1396 else
1000 downheap (heap, N, k); 1397 downheap (heap, N, k);
1001} 1398}
1002 1399
… …
1012 upheap (heap, i + HEAP0); 1409 upheap (heap, i + HEAP0);
1013} 1410}
1014 1411
1015/*****************************************************************************/ 1412/*****************************************************************************/
1016 1413
1414/* associate signal watchers to a signal signal */
1017typedef struct 1415typedef struct
1018{ 1416{
1417 EV_ATOMIC_T pending;
1418#if EV_MULTIPLICITY
1419 EV_P;
1420#endif
1019 WL head; 1421 WL head;
1020 EV_ATOMIC_T gotsig;
1021} ANSIG; 1422} ANSIG;
1022 1423
1023static ANSIG *signals; 1424static ANSIG signals [EV_NSIG - 1];
1024static int signalmax;
1025
1026static EV_ATOMIC_T gotsig;
1027 1425
1028/*****************************************************************************/ 1426/*****************************************************************************/
1029 1427
1030inline_speed void 1428#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1031fd_intern (int fd)
1032{
1033#ifdef _WIN32
1034 unsigned long arg = 1;
1035 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1036#else
1037 fcntl (fd, F_SETFD, FD_CLOEXEC);
1038 fcntl (fd, F_SETFL, O_NONBLOCK);
1039#endif
1040}
1041 1429
1042static void noinline 1430static void noinline ecb_cold
1043evpipe_init (EV_P) 1431evpipe_init (EV_P)
1044{ 1432{
1045 if (!ev_is_active (&pipeev)) 1433 if (!ev_is_active (&pipe_w))
1046 { 1434 {
1047#if EV_USE_EVENTFD 1435# if EV_USE_EVENTFD
1436 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1437 if (evfd < 0 && errno == EINVAL)
1048 if ((evfd = eventfd (0, 0)) >= 0) 1438 evfd = eventfd (0, 0);
1439
1440 if (evfd >= 0)
1049 { 1441 {
1050 evpipe [0] = -1; 1442 evpipe [0] = -1;
1051 fd_intern (evfd); 1443 fd_intern (evfd); /* doing it twice doesn't hurt */
1052 ev_io_set (&pipeev, evfd, EV_READ); 1444 ev_io_set (&pipe_w, evfd, EV_READ);
1053 } 1445 }
1054 else 1446 else
1055#endif 1447# endif
1056 { 1448 {
1057 while (pipe (evpipe)) 1449 while (pipe (evpipe))
1058 ev_syserr ("(libev) error creating signal/async pipe"); 1450 ev_syserr ("(libev) error creating signal/async pipe");
1059 1451
1060 fd_intern (evpipe [0]); 1452 fd_intern (evpipe [0]);
1061 fd_intern (evpipe [1]); 1453 fd_intern (evpipe [1]);
1062 ev_io_set (&pipeev, evpipe [0], EV_READ); 1454 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1063 } 1455 }
1064 1456
1065 ev_io_start (EV_A_ &pipeev); 1457 ev_io_start (EV_A_ &pipe_w);
1066 ev_unref (EV_A); /* watcher should not keep loop alive */ 1458 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 } 1459 }
1068} 1460}
1069 1461
1070inline_size void 1462inline_speed void
1071evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1463evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072{ 1464{
1073 if (!*flag) 1465 if (expect_true (*flag))
1466 return;
1467
1468 *flag = 1;
1469
1470 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1471
1472 pipe_write_skipped = 1;
1473
1474 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1475
1476 if (pipe_write_wanted)
1074 { 1477 {
1478 int old_errno;
1479
1480 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1481
1075 int old_errno = errno; /* save errno because write might clobber it */ 1482 old_errno = errno; /* save errno because write will clobber it */
1076
1077 *flag = 1;
1078 1483
1079#if EV_USE_EVENTFD 1484#if EV_USE_EVENTFD
1080 if (evfd >= 0) 1485 if (evfd >= 0)
1081 { 1486 {
1082 uint64_t counter = 1; 1487 uint64_t counter = 1;
1083 write (evfd, &counter, sizeof (uint64_t)); 1488 write (evfd, &counter, sizeof (uint64_t));
1084 } 1489 }
1085 else 1490 else
1086#endif 1491#endif
1492 {
1493 /* win32 people keep sending patches that change this write() to send() */
1494 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1495 /* so when you think this write should be a send instead, please find out */
1496 /* where your send() is from - it's definitely not the microsoft send, and */
1497 /* tell me. thank you. */
1087 write (evpipe [1], &old_errno, 1); 1498 write (evpipe [1], &(evpipe [1]), 1);
1499 }
1088 1500
1089 errno = old_errno; 1501 errno = old_errno;
1090 } 1502 }
1091} 1503}
1092 1504
1505/* called whenever the libev signal pipe */
1506/* got some events (signal, async) */
1093static void 1507static void
1094pipecb (EV_P_ ev_io *iow, int revents) 1508pipecb (EV_P_ ev_io *iow, int revents)
1095{ 1509{
1510 int i;
1511
1512 if (revents & EV_READ)
1513 {
1096#if EV_USE_EVENTFD 1514#if EV_USE_EVENTFD
1097 if (evfd >= 0) 1515 if (evfd >= 0)
1098 { 1516 {
1099 uint64_t counter; 1517 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t)); 1518 read (evfd, &counter, sizeof (uint64_t));
1101 } 1519 }
1102 else 1520 else
1103#endif 1521#endif
1104 { 1522 {
1105 char dummy; 1523 char dummy;
1524 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1106 read (evpipe [0], &dummy, 1); 1525 read (evpipe [0], &dummy, 1);
1526 }
1527 }
1528
1529 pipe_write_skipped = 0;
1530
1531#if EV_SIGNAL_ENABLE
1532 if (sig_pending)
1107 } 1533 {
1534 sig_pending = 0;
1108 1535
1109 if (gotsig && ev_is_default_loop (EV_A)) 1536 for (i = EV_NSIG - 1; i--; )
1110 { 1537 if (expect_false (signals [i].pending))
1111 int signum;
1112 gotsig = 0;
1113
1114 for (signum = signalmax; signum--; )
1115 if (signals [signum].gotsig)
1116 ev_feed_signal_event (EV_A_ signum + 1); 1538 ev_feed_signal_event (EV_A_ i + 1);
1117 } 1539 }
1540#endif
1118 1541
1119#if EV_ASYNC_ENABLE 1542#if EV_ASYNC_ENABLE
1120 if (gotasync) 1543 if (async_pending)
1121 { 1544 {
1122 int i; 1545 async_pending = 0;
1123 gotasync = 0;
1124 1546
1125 for (i = asynccnt; i--; ) 1547 for (i = asynccnt; i--; )
1126 if (asyncs [i]->sent) 1548 if (asyncs [i]->sent)
1127 { 1549 {
1128 asyncs [i]->sent = 0; 1550 asyncs [i]->sent = 0;
… …
1132#endif 1554#endif
1133} 1555}
1134 1556
1135/*****************************************************************************/ 1557/*****************************************************************************/
1136 1558
1559void
1560ev_feed_signal (int signum)
1561{
1562#if EV_MULTIPLICITY
1563 EV_P = signals [signum - 1].loop;
1564
1565 if (!EV_A)
1566 return;
1567#endif
1568
1569 if (!ev_active (&pipe_w))
1570 return;
1571
1572 signals [signum - 1].pending = 1;
1573 evpipe_write (EV_A_ &sig_pending);
1574}
1575
1137static void 1576static void
1138ev_sighandler (int signum) 1577ev_sighandler (int signum)
1139{ 1578{
1140#if EV_MULTIPLICITY
1141 struct ev_loop *loop = &default_loop_struct;
1142#endif
1143
1144#if _WIN32 1579#ifdef _WIN32
1145 signal (signum, ev_sighandler); 1580 signal (signum, ev_sighandler);
1146#endif 1581#endif
1147 1582
1148 signals [signum - 1].gotsig = 1; 1583 ev_feed_signal (signum);
1149 evpipe_write (EV_A_ &gotsig);
1150} 1584}
1151 1585
1152void noinline 1586void noinline
1153ev_feed_signal_event (EV_P_ int signum) 1587ev_feed_signal_event (EV_P_ int signum)
1154{ 1588{
1155 WL w; 1589 WL w;
1156 1590
1591 if (expect_false (signum <= 0 || signum > EV_NSIG))
1592 return;
1593
1594 --signum;
1595
1157#if EV_MULTIPLICITY 1596#if EV_MULTIPLICITY
1158 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1597 /* it is permissible to try to feed a signal to the wrong loop */
1159#endif 1598 /* or, likely more useful, feeding a signal nobody is waiting for */
1160 1599
1161 --signum; 1600 if (expect_false (signals [signum].loop != EV_A))
1162
1163 if (signum < 0 || signum >= signalmax)
1164 return; 1601 return;
1602#endif
1165 1603
1166 signals [signum].gotsig = 0; 1604 signals [signum].pending = 0;
1167 1605
1168 for (w = signals [signum].head; w; w = w->next) 1606 for (w = signals [signum].head; w; w = w->next)
1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1607 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170} 1608}
1171 1609
1610#if EV_USE_SIGNALFD
1611static void
1612sigfdcb (EV_P_ ev_io *iow, int revents)
1613{
1614 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1615
1616 for (;;)
1617 {
1618 ssize_t res = read (sigfd, si, sizeof (si));
1619
1620 /* not ISO-C, as res might be -1, but works with SuS */
1621 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1622 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1623
1624 if (res < (ssize_t)sizeof (si))
1625 break;
1626 }
1627}
1628#endif
1629
1630#endif
1631
1172/*****************************************************************************/ 1632/*****************************************************************************/
1173 1633
1634#if EV_CHILD_ENABLE
1174static WL childs [EV_PID_HASHSIZE]; 1635static WL childs [EV_PID_HASHSIZE];
1175
1176#ifndef _WIN32
1177 1636
1178static ev_signal childev; 1637static ev_signal childev;
1179 1638
1180#ifndef WIFCONTINUED 1639#ifndef WIFCONTINUED
1181# define WIFCONTINUED(status) 0 1640# define WIFCONTINUED(status) 0
1182#endif 1641#endif
1183 1642
1643/* handle a single child status event */
1184inline_speed void 1644inline_speed void
1185child_reap (EV_P_ int chain, int pid, int status) 1645child_reap (EV_P_ int chain, int pid, int status)
1186{ 1646{
1187 ev_child *w; 1647 ev_child *w;
1188 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1648 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189 1649
1190 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1650 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 { 1651 {
1192 if ((w->pid == pid || !w->pid) 1652 if ((w->pid == pid || !w->pid)
1193 && (!traced || (w->flags & 1))) 1653 && (!traced || (w->flags & 1)))
1194 { 1654 {
1195 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1655 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1202 1662
1203#ifndef WCONTINUED 1663#ifndef WCONTINUED
1204# define WCONTINUED 0 1664# define WCONTINUED 0
1205#endif 1665#endif
1206 1666
1667/* called on sigchld etc., calls waitpid */
1207static void 1668static void
1208childcb (EV_P_ ev_signal *sw, int revents) 1669childcb (EV_P_ ev_signal *sw, int revents)
1209{ 1670{
1210 int pid, status; 1671 int pid, status;
1211 1672
… …
1219 /* make sure we are called again until all children have been reaped */ 1680 /* make sure we are called again until all children have been reaped */
1220 /* we need to do it this way so that the callback gets called before we continue */ 1681 /* we need to do it this way so that the callback gets called before we continue */
1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1682 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1222 1683
1223 child_reap (EV_A_ pid, pid, status); 1684 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1) 1685 if ((EV_PID_HASHSIZE) > 1)
1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1686 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1226} 1687}
1227 1688
1228#endif 1689#endif
1229 1690
1230/*****************************************************************************/ 1691/*****************************************************************************/
1231 1692
1693#if EV_USE_IOCP
1694# include "ev_iocp.c"
1695#endif
1232#if EV_USE_PORT 1696#if EV_USE_PORT
1233# include "ev_port.c" 1697# include "ev_port.c"
1234#endif 1698#endif
1235#if EV_USE_KQUEUE 1699#if EV_USE_KQUEUE
1236# include "ev_kqueue.c" 1700# include "ev_kqueue.c"
… …
1243#endif 1707#endif
1244#if EV_USE_SELECT 1708#if EV_USE_SELECT
1245# include "ev_select.c" 1709# include "ev_select.c"
1246#endif 1710#endif
1247 1711
1248int 1712int ecb_cold
1249ev_version_major (void) 1713ev_version_major (void)
1250{ 1714{
1251 return EV_VERSION_MAJOR; 1715 return EV_VERSION_MAJOR;
1252} 1716}
1253 1717
1254int 1718int ecb_cold
1255ev_version_minor (void) 1719ev_version_minor (void)
1256{ 1720{
1257 return EV_VERSION_MINOR; 1721 return EV_VERSION_MINOR;
1258} 1722}
1259 1723
1260/* return true if we are running with elevated privileges and should ignore env variables */ 1724/* return true if we are running with elevated privileges and should ignore env variables */
1261int inline_size 1725int inline_size ecb_cold
1262enable_secure (void) 1726enable_secure (void)
1263{ 1727{
1264#ifdef _WIN32 1728#ifdef _WIN32
1265 return 0; 1729 return 0;
1266#else 1730#else
1267 return getuid () != geteuid () 1731 return getuid () != geteuid ()
1268 || getgid () != getegid (); 1732 || getgid () != getegid ();
1269#endif 1733#endif
1270} 1734}
1271 1735
1272unsigned int 1736unsigned int ecb_cold
1273ev_supported_backends (void) 1737ev_supported_backends (void)
1274{ 1738{
1275 unsigned int flags = 0; 1739 unsigned int flags = 0;
1276 1740
1277 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1281 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1282 1746
1283 return flags; 1747 return flags;
1284} 1748}
1285 1749
1286unsigned int 1750unsigned int ecb_cold
1287ev_recommended_backends (void) 1751ev_recommended_backends (void)
1288{ 1752{
1289 unsigned int flags = ev_supported_backends (); 1753 unsigned int flags = ev_supported_backends ();
1290 1754
1291#ifndef __NetBSD__ 1755#ifndef __NetBSD__
… …
1296#ifdef __APPLE__ 1760#ifdef __APPLE__
1297 /* only select works correctly on that "unix-certified" platform */ 1761 /* only select works correctly on that "unix-certified" platform */
1298 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 1762 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 1763 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1300#endif 1764#endif
1765#ifdef __FreeBSD__
1766 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1767#endif
1301 1768
1302 return flags; 1769 return flags;
1303} 1770}
1304 1771
1305unsigned int 1772unsigned int ecb_cold
1306ev_embeddable_backends (void) 1773ev_embeddable_backends (void)
1307{ 1774{
1308 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1775 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1309 1776
1310 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1777 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 /* please fix it and tell me how to detect the fix */ 1778 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1312 flags &= ~EVBACKEND_EPOLL; 1779 flags &= ~EVBACKEND_EPOLL;
1313 1780
1314 return flags; 1781 return flags;
1315} 1782}
1316 1783
1317unsigned int 1784unsigned int
1318ev_backend (EV_P) 1785ev_backend (EV_P)
1319{ 1786{
1320 return backend; 1787 return backend;
1321} 1788}
1322 1789
1790#if EV_FEATURE_API
1323unsigned int 1791unsigned int
1324ev_loop_count (EV_P) 1792ev_iteration (EV_P)
1325{ 1793{
1326 return loop_count; 1794 return loop_count;
1795}
1796
1797unsigned int
1798ev_depth (EV_P)
1799{
1800 return loop_depth;
1327} 1801}
1328 1802
1329void 1803void
1330ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1804ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1331{ 1805{
… …
1336ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1810ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1337{ 1811{
1338 timeout_blocktime = interval; 1812 timeout_blocktime = interval;
1339} 1813}
1340 1814
1815void
1816ev_set_userdata (EV_P_ void *data)
1817{
1818 userdata = data;
1819}
1820
1821void *
1822ev_userdata (EV_P)
1823{
1824 return userdata;
1825}
1826
1827void
1828ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1829{
1830 invoke_cb = invoke_pending_cb;
1831}
1832
1833void
1834ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1835{
1836 release_cb = release;
1837 acquire_cb = acquire;
1838}
1839#endif
1840
1841/* initialise a loop structure, must be zero-initialised */
1341static void noinline 1842static void noinline ecb_cold
1342loop_init (EV_P_ unsigned int flags) 1843loop_init (EV_P_ unsigned int flags)
1343{ 1844{
1344 if (!backend) 1845 if (!backend)
1345 { 1846 {
1847 origflags = flags;
1848
1346#if EV_USE_REALTIME 1849#if EV_USE_REALTIME
1347 if (!have_realtime) 1850 if (!have_realtime)
1348 { 1851 {
1349 struct timespec ts; 1852 struct timespec ts;
1350 1853
… …
1361 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1864 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362 have_monotonic = 1; 1865 have_monotonic = 1;
1363 } 1866 }
1364#endif 1867#endif
1365 1868
1366 ev_rt_now = ev_time ();
1367 mn_now = get_clock ();
1368 now_floor = mn_now;
1369 rtmn_diff = ev_rt_now - mn_now;
1370
1371 io_blocktime = 0.;
1372 timeout_blocktime = 0.;
1373 backend = 0;
1374 backend_fd = -1;
1375 gotasync = 0;
1376#if EV_USE_INOTIFY
1377 fs_fd = -2;
1378#endif
1379
1380 /* pid check not overridable via env */ 1869 /* pid check not overridable via env */
1381#ifndef _WIN32 1870#ifndef _WIN32
1382 if (flags & EVFLAG_FORKCHECK) 1871 if (flags & EVFLAG_FORKCHECK)
1383 curpid = getpid (); 1872 curpid = getpid ();
1384#endif 1873#endif
… …
1386 if (!(flags & EVFLAG_NOENV) 1875 if (!(flags & EVFLAG_NOENV)
1387 && !enable_secure () 1876 && !enable_secure ()
1388 && getenv ("LIBEV_FLAGS")) 1877 && getenv ("LIBEV_FLAGS"))
1389 flags = atoi (getenv ("LIBEV_FLAGS")); 1878 flags = atoi (getenv ("LIBEV_FLAGS"));
1390 1879
1391 if (!(flags & 0x0000ffffU)) 1880 ev_rt_now = ev_time ();
1881 mn_now = get_clock ();
1882 now_floor = mn_now;
1883 rtmn_diff = ev_rt_now - mn_now;
1884#if EV_FEATURE_API
1885 invoke_cb = ev_invoke_pending;
1886#endif
1887
1888 io_blocktime = 0.;
1889 timeout_blocktime = 0.;
1890 backend = 0;
1891 backend_fd = -1;
1892 sig_pending = 0;
1893#if EV_ASYNC_ENABLE
1894 async_pending = 0;
1895#endif
1896 pipe_write_skipped = 0;
1897 pipe_write_wanted = 0;
1898#if EV_USE_INOTIFY
1899 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1900#endif
1901#if EV_USE_SIGNALFD
1902 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1903#endif
1904
1905 if (!(flags & EVBACKEND_MASK))
1392 flags |= ev_recommended_backends (); 1906 flags |= ev_recommended_backends ();
1393 1907
1908#if EV_USE_IOCP
1909 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1910#endif
1394#if EV_USE_PORT 1911#if EV_USE_PORT
1395 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1912 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1396#endif 1913#endif
1397#if EV_USE_KQUEUE 1914#if EV_USE_KQUEUE
1398 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1915 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1405#endif 1922#endif
1406#if EV_USE_SELECT 1923#if EV_USE_SELECT
1407 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1924 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1408#endif 1925#endif
1409 1926
1927 ev_prepare_init (&pending_w, pendingcb);
1928
1929#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1410 ev_init (&pipeev, pipecb); 1930 ev_init (&pipe_w, pipecb);
1411 ev_set_priority (&pipeev, EV_MAXPRI); 1931 ev_set_priority (&pipe_w, EV_MAXPRI);
1932#endif
1412 } 1933 }
1413} 1934}
1414 1935
1415static void noinline 1936/* free up a loop structure */
1937void ecb_cold
1416loop_destroy (EV_P) 1938ev_loop_destroy (EV_P)
1417{ 1939{
1418 int i; 1940 int i;
1419 1941
1942#if EV_MULTIPLICITY
1943 /* mimic free (0) */
1944 if (!EV_A)
1945 return;
1946#endif
1947
1948#if EV_CLEANUP_ENABLE
1949 /* queue cleanup watchers (and execute them) */
1950 if (expect_false (cleanupcnt))
1951 {
1952 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1953 EV_INVOKE_PENDING;
1954 }
1955#endif
1956
1957#if EV_CHILD_ENABLE
1958 if (ev_is_active (&childev))
1959 {
1960 ev_ref (EV_A); /* child watcher */
1961 ev_signal_stop (EV_A_ &childev);
1962 }
1963#endif
1964
1420 if (ev_is_active (&pipeev)) 1965 if (ev_is_active (&pipe_w))
1421 { 1966 {
1422 ev_ref (EV_A); /* signal watcher */ 1967 /*ev_ref (EV_A);*/
1423 ev_io_stop (EV_A_ &pipeev); 1968 /*ev_io_stop (EV_A_ &pipe_w);*/
1424 1969
1425#if EV_USE_EVENTFD 1970#if EV_USE_EVENTFD
1426 if (evfd >= 0) 1971 if (evfd >= 0)
1427 close (evfd); 1972 close (evfd);
1428#endif 1973#endif
1429 1974
1430 if (evpipe [0] >= 0) 1975 if (evpipe [0] >= 0)
1431 { 1976 {
1432 close (evpipe [0]); 1977 EV_WIN32_CLOSE_FD (evpipe [0]);
1433 close (evpipe [1]); 1978 EV_WIN32_CLOSE_FD (evpipe [1]);
1434 } 1979 }
1435 } 1980 }
1981
1982#if EV_USE_SIGNALFD
1983 if (ev_is_active (&sigfd_w))
1984 close (sigfd);
1985#endif
1436 1986
1437#if EV_USE_INOTIFY 1987#if EV_USE_INOTIFY
1438 if (fs_fd >= 0) 1988 if (fs_fd >= 0)
1439 close (fs_fd); 1989 close (fs_fd);
1440#endif 1990#endif
1441 1991
1442 if (backend_fd >= 0) 1992 if (backend_fd >= 0)
1443 close (backend_fd); 1993 close (backend_fd);
1444 1994
1995#if EV_USE_IOCP
1996 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1997#endif
1445#if EV_USE_PORT 1998#if EV_USE_PORT
1446 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1999 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1447#endif 2000#endif
1448#if EV_USE_KQUEUE 2001#if EV_USE_KQUEUE
1449 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2002 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1464#if EV_IDLE_ENABLE 2017#if EV_IDLE_ENABLE
1465 array_free (idle, [i]); 2018 array_free (idle, [i]);
1466#endif 2019#endif
1467 } 2020 }
1468 2021
1469 ev_free (anfds); anfdmax = 0; 2022 ev_free (anfds); anfds = 0; anfdmax = 0;
1470 2023
1471 /* have to use the microsoft-never-gets-it-right macro */ 2024 /* have to use the microsoft-never-gets-it-right macro */
1472 array_free (rfeed, EMPTY); 2025 array_free (rfeed, EMPTY);
1473 array_free (fdchange, EMPTY); 2026 array_free (fdchange, EMPTY);
1474 array_free (timer, EMPTY); 2027 array_free (timer, EMPTY);
… …
1476 array_free (periodic, EMPTY); 2029 array_free (periodic, EMPTY);
1477#endif 2030#endif
1478#if EV_FORK_ENABLE 2031#if EV_FORK_ENABLE
1479 array_free (fork, EMPTY); 2032 array_free (fork, EMPTY);
1480#endif 2033#endif
2034#if EV_CLEANUP_ENABLE
2035 array_free (cleanup, EMPTY);
2036#endif
1481 array_free (prepare, EMPTY); 2037 array_free (prepare, EMPTY);
1482 array_free (check, EMPTY); 2038 array_free (check, EMPTY);
1483#if EV_ASYNC_ENABLE 2039#if EV_ASYNC_ENABLE
1484 array_free (async, EMPTY); 2040 array_free (async, EMPTY);
1485#endif 2041#endif
1486 2042
1487 backend = 0; 2043 backend = 0;
2044
2045#if EV_MULTIPLICITY
2046 if (ev_is_default_loop (EV_A))
2047#endif
2048 ev_default_loop_ptr = 0;
2049#if EV_MULTIPLICITY
2050 else
2051 ev_free (EV_A);
2052#endif
1488} 2053}
1489 2054
1490#if EV_USE_INOTIFY 2055#if EV_USE_INOTIFY
1491inline_size void infy_fork (EV_P); 2056inline_size void infy_fork (EV_P);
1492#endif 2057#endif
… …
1505#endif 2070#endif
1506#if EV_USE_INOTIFY 2071#if EV_USE_INOTIFY
1507 infy_fork (EV_A); 2072 infy_fork (EV_A);
1508#endif 2073#endif
1509 2074
1510 if (ev_is_active (&pipeev)) 2075 if (ev_is_active (&pipe_w))
1511 { 2076 {
1512 /* this "locks" the handlers against writing to the pipe */ 2077 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1513 /* while we modify the fd vars */
1514 gotsig = 1;
1515#if EV_ASYNC_ENABLE
1516 gotasync = 1;
1517#endif
1518 2078
1519 ev_ref (EV_A); 2079 ev_ref (EV_A);
1520 ev_io_stop (EV_A_ &pipeev); 2080 ev_io_stop (EV_A_ &pipe_w);
1521 2081
1522#if EV_USE_EVENTFD 2082#if EV_USE_EVENTFD
1523 if (evfd >= 0) 2083 if (evfd >= 0)
1524 close (evfd); 2084 close (evfd);
1525#endif 2085#endif
1526 2086
1527 if (evpipe [0] >= 0) 2087 if (evpipe [0] >= 0)
1528 { 2088 {
1529 close (evpipe [0]); 2089 EV_WIN32_CLOSE_FD (evpipe [0]);
1530 close (evpipe [1]); 2090 EV_WIN32_CLOSE_FD (evpipe [1]);
1531 } 2091 }
1532 2092
2093#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1533 evpipe_init (EV_A); 2094 evpipe_init (EV_A);
1534 /* now iterate over everything, in case we missed something */ 2095 /* now iterate over everything, in case we missed something */
1535 pipecb (EV_A_ &pipeev, EV_READ); 2096 pipecb (EV_A_ &pipe_w, EV_READ);
2097#endif
1536 } 2098 }
1537 2099
1538 postfork = 0; 2100 postfork = 0;
1539} 2101}
1540 2102
1541#if EV_MULTIPLICITY 2103#if EV_MULTIPLICITY
1542 2104
1543struct ev_loop * 2105struct ev_loop * ecb_cold
1544ev_loop_new (unsigned int flags) 2106ev_loop_new (unsigned int flags)
1545{ 2107{
1546 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2108 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547 2109
1548 memset (loop, 0, sizeof (struct ev_loop)); 2110 memset (EV_A, 0, sizeof (struct ev_loop));
1549
1550 loop_init (EV_A_ flags); 2111 loop_init (EV_A_ flags);
1551 2112
1552 if (ev_backend (EV_A)) 2113 if (ev_backend (EV_A))
1553 return loop; 2114 return EV_A;
1554 2115
2116 ev_free (EV_A);
1555 return 0; 2117 return 0;
1556} 2118}
1557 2119
1558void 2120#endif /* multiplicity */
1559ev_loop_destroy (EV_P)
1560{
1561 loop_destroy (EV_A);
1562 ev_free (loop);
1563}
1564
1565void
1566ev_loop_fork (EV_P)
1567{
1568 postfork = 1; /* must be in line with ev_default_fork */
1569}
1570 2121
1571#if EV_VERIFY 2122#if EV_VERIFY
1572static void noinline 2123static void noinline ecb_cold
1573verify_watcher (EV_P_ W w) 2124verify_watcher (EV_P_ W w)
1574{ 2125{
1575 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2126 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576 2127
1577 if (w->pending) 2128 if (w->pending)
1578 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2129 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579} 2130}
1580 2131
1581static void noinline 2132static void noinline ecb_cold
1582verify_heap (EV_P_ ANHE *heap, int N) 2133verify_heap (EV_P_ ANHE *heap, int N)
1583{ 2134{
1584 int i; 2135 int i;
1585 2136
1586 for (i = HEAP0; i < N + HEAP0; ++i) 2137 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1591 2142
1592 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2143 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593 } 2144 }
1594} 2145}
1595 2146
1596static void noinline 2147static void noinline ecb_cold
1597array_verify (EV_P_ W *ws, int cnt) 2148array_verify (EV_P_ W *ws, int cnt)
1598{ 2149{
1599 while (cnt--) 2150 while (cnt--)
1600 { 2151 {
1601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2152 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 verify_watcher (EV_A_ ws [cnt]); 2153 verify_watcher (EV_A_ ws [cnt]);
1603 } 2154 }
1604} 2155}
1605#endif 2156#endif
1606 2157
1607void 2158#if EV_FEATURE_API
2159void ecb_cold
1608ev_loop_verify (EV_P) 2160ev_verify (EV_P)
1609{ 2161{
1610#if EV_VERIFY 2162#if EV_VERIFY
1611 int i; 2163 int i;
1612 WL w; 2164 WL w;
1613 2165
… …
1647#if EV_FORK_ENABLE 2199#if EV_FORK_ENABLE
1648 assert (forkmax >= forkcnt); 2200 assert (forkmax >= forkcnt);
1649 array_verify (EV_A_ (W *)forks, forkcnt); 2201 array_verify (EV_A_ (W *)forks, forkcnt);
1650#endif 2202#endif
1651 2203
2204#if EV_CLEANUP_ENABLE
2205 assert (cleanupmax >= cleanupcnt);
2206 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2207#endif
2208
1652#if EV_ASYNC_ENABLE 2209#if EV_ASYNC_ENABLE
1653 assert (asyncmax >= asynccnt); 2210 assert (asyncmax >= asynccnt);
1654 array_verify (EV_A_ (W *)asyncs, asynccnt); 2211 array_verify (EV_A_ (W *)asyncs, asynccnt);
1655#endif 2212#endif
1656 2213
2214#if EV_PREPARE_ENABLE
1657 assert (preparemax >= preparecnt); 2215 assert (preparemax >= preparecnt);
1658 array_verify (EV_A_ (W *)prepares, preparecnt); 2216 array_verify (EV_A_ (W *)prepares, preparecnt);
2217#endif
1659 2218
2219#if EV_CHECK_ENABLE
1660 assert (checkmax >= checkcnt); 2220 assert (checkmax >= checkcnt);
1661 array_verify (EV_A_ (W *)checks, checkcnt); 2221 array_verify (EV_A_ (W *)checks, checkcnt);
2222#endif
1662 2223
1663# if 0 2224# if 0
2225#if EV_CHILD_ENABLE
1664 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2226 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1665 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 2227 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2228#endif
1666# endif 2229# endif
1667#endif 2230#endif
1668} 2231}
1669 2232#endif
1670#endif /* multiplicity */
1671 2233
1672#if EV_MULTIPLICITY 2234#if EV_MULTIPLICITY
1673struct ev_loop * 2235struct ev_loop * ecb_cold
1674ev_default_loop_init (unsigned int flags)
1675#else 2236#else
1676int 2237int
2238#endif
1677ev_default_loop (unsigned int flags) 2239ev_default_loop (unsigned int flags)
1678#endif
1679{ 2240{
1680 if (!ev_default_loop_ptr) 2241 if (!ev_default_loop_ptr)
1681 { 2242 {
1682#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
1683 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2244 EV_P = ev_default_loop_ptr = &default_loop_struct;
1684#else 2245#else
1685 ev_default_loop_ptr = 1; 2246 ev_default_loop_ptr = 1;
1686#endif 2247#endif
1687 2248
1688 loop_init (EV_A_ flags); 2249 loop_init (EV_A_ flags);
1689 2250
1690 if (ev_backend (EV_A)) 2251 if (ev_backend (EV_A))
1691 { 2252 {
1692#ifndef _WIN32 2253#if EV_CHILD_ENABLE
1693 ev_signal_init (&childev, childcb, SIGCHLD); 2254 ev_signal_init (&childev, childcb, SIGCHLD);
1694 ev_set_priority (&childev, EV_MAXPRI); 2255 ev_set_priority (&childev, EV_MAXPRI);
1695 ev_signal_start (EV_A_ &childev); 2256 ev_signal_start (EV_A_ &childev);
1696 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2257 ev_unref (EV_A); /* child watcher should not keep loop alive */
1697#endif 2258#endif
… …
1702 2263
1703 return ev_default_loop_ptr; 2264 return ev_default_loop_ptr;
1704} 2265}
1705 2266
1706void 2267void
1707ev_default_destroy (void) 2268ev_loop_fork (EV_P)
1708{ 2269{
1709#if EV_MULTIPLICITY
1710 struct ev_loop *loop = ev_default_loop_ptr;
1711#endif
1712
1713 ev_default_loop_ptr = 0;
1714
1715#ifndef _WIN32
1716 ev_ref (EV_A); /* child watcher */
1717 ev_signal_stop (EV_A_ &childev);
1718#endif
1719
1720 loop_destroy (EV_A);
1721}
1722
1723void
1724ev_default_fork (void)
1725{
1726#if EV_MULTIPLICITY
1727 struct ev_loop *loop = ev_default_loop_ptr;
1728#endif
1729
1730 postfork = 1; /* must be in line with ev_loop_fork */ 2270 postfork = 1; /* must be in line with ev_default_fork */
1731} 2271}
1732 2272
1733/*****************************************************************************/ 2273/*****************************************************************************/
1734 2274
1735void 2275void
1736ev_invoke (EV_P_ void *w, int revents) 2276ev_invoke (EV_P_ void *w, int revents)
1737{ 2277{
1738 EV_CB_INVOKE ((W)w, revents); 2278 EV_CB_INVOKE ((W)w, revents);
1739} 2279}
1740 2280
1741inline_speed void 2281unsigned int
1742call_pending (EV_P) 2282ev_pending_count (EV_P)
2283{
2284 int pri;
2285 unsigned int count = 0;
2286
2287 for (pri = NUMPRI; pri--; )
2288 count += pendingcnt [pri];
2289
2290 return count;
2291}
2292
2293void noinline
2294ev_invoke_pending (EV_P)
1743{ 2295{
1744 int pri; 2296 int pri;
1745 2297
1746 for (pri = NUMPRI; pri--; ) 2298 for (pri = NUMPRI; pri--; )
1747 while (pendingcnt [pri]) 2299 while (pendingcnt [pri])
1748 { 2300 {
1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2301 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1750 2302
1751 if (expect_true (p->w))
1752 {
1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1754
1755 p->w->pending = 0; 2303 p->w->pending = 0;
1756 EV_CB_INVOKE (p->w, p->events); 2304 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK; 2305 EV_FREQUENT_CHECK;
1758 }
1759 } 2306 }
1760} 2307}
1761 2308
1762#if EV_IDLE_ENABLE 2309#if EV_IDLE_ENABLE
2310/* make idle watchers pending. this handles the "call-idle */
2311/* only when higher priorities are idle" logic */
1763inline_size void 2312inline_size void
1764idle_reify (EV_P) 2313idle_reify (EV_P)
1765{ 2314{
1766 if (expect_false (idleall)) 2315 if (expect_false (idleall))
1767 { 2316 {
… …
1780 } 2329 }
1781 } 2330 }
1782} 2331}
1783#endif 2332#endif
1784 2333
2334/* make timers pending */
1785inline_size void 2335inline_size void
1786timers_reify (EV_P) 2336timers_reify (EV_P)
1787{ 2337{
1788 EV_FREQUENT_CHECK; 2338 EV_FREQUENT_CHECK;
1789 2339
… …
1813 EV_FREQUENT_CHECK; 2363 EV_FREQUENT_CHECK;
1814 feed_reverse (EV_A_ (W)w); 2364 feed_reverse (EV_A_ (W)w);
1815 } 2365 }
1816 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2366 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1817 2367
1818 feed_reverse_done (EV_A_ EV_TIMEOUT); 2368 feed_reverse_done (EV_A_ EV_TIMER);
1819 } 2369 }
1820} 2370}
1821 2371
1822#if EV_PERIODIC_ENABLE 2372#if EV_PERIODIC_ENABLE
2373
2374static void noinline
2375periodic_recalc (EV_P_ ev_periodic *w)
2376{
2377 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2378 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2379
2380 /* the above almost always errs on the low side */
2381 while (at <= ev_rt_now)
2382 {
2383 ev_tstamp nat = at + w->interval;
2384
2385 /* when resolution fails us, we use ev_rt_now */
2386 if (expect_false (nat == at))
2387 {
2388 at = ev_rt_now;
2389 break;
2390 }
2391
2392 at = nat;
2393 }
2394
2395 ev_at (w) = at;
2396}
2397
2398/* make periodics pending */
1823inline_size void 2399inline_size void
1824periodics_reify (EV_P) 2400periodics_reify (EV_P)
1825{ 2401{
1826 EV_FREQUENT_CHECK; 2402 EV_FREQUENT_CHECK;
1827 2403
… …
1845 ANHE_at_cache (periodics [HEAP0]); 2421 ANHE_at_cache (periodics [HEAP0]);
1846 downheap (periodics, periodiccnt, HEAP0); 2422 downheap (periodics, periodiccnt, HEAP0);
1847 } 2423 }
1848 else if (w->interval) 2424 else if (w->interval)
1849 { 2425 {
1850 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2426 periodic_recalc (EV_A_ w);
1851 /* if next trigger time is not sufficiently in the future, put it there */
1852 /* this might happen because of floating point inexactness */
1853 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854 {
1855 ev_at (w) += w->interval;
1856
1857 /* if interval is unreasonably low we might still have a time in the past */
1858 /* so correct this. this will make the periodic very inexact, but the user */
1859 /* has effectively asked to get triggered more often than possible */
1860 if (ev_at (w) < ev_rt_now)
1861 ev_at (w) = ev_rt_now;
1862 }
1863
1864 ANHE_at_cache (periodics [HEAP0]); 2427 ANHE_at_cache (periodics [HEAP0]);
1865 downheap (periodics, periodiccnt, HEAP0); 2428 downheap (periodics, periodiccnt, HEAP0);
1866 } 2429 }
1867 else 2430 else
1868 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2431 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
1874 2437
1875 feed_reverse_done (EV_A_ EV_PERIODIC); 2438 feed_reverse_done (EV_A_ EV_PERIODIC);
1876 } 2439 }
1877} 2440}
1878 2441
2442/* simply recalculate all periodics */
2443/* TODO: maybe ensure that at least one event happens when jumping forward? */
1879static void noinline 2444static void noinline ecb_cold
1880periodics_reschedule (EV_P) 2445periodics_reschedule (EV_P)
1881{ 2446{
1882 int i; 2447 int i;
1883 2448
1884 /* adjust periodics after time jump */ 2449 /* adjust periodics after time jump */
… …
1887 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2452 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1888 2453
1889 if (w->reschedule_cb) 2454 if (w->reschedule_cb)
1890 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2455 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1891 else if (w->interval) 2456 else if (w->interval)
1892 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2457 periodic_recalc (EV_A_ w);
1893 2458
1894 ANHE_at_cache (periodics [i]); 2459 ANHE_at_cache (periodics [i]);
1895 } 2460 }
1896 2461
1897 reheap (periodics, periodiccnt); 2462 reheap (periodics, periodiccnt);
1898} 2463}
1899#endif 2464#endif
1900 2465
2466/* adjust all timers by a given offset */
1901static void noinline 2467static void noinline ecb_cold
1902timers_reschedule (EV_P_ ev_tstamp adjust) 2468timers_reschedule (EV_P_ ev_tstamp adjust)
1903{ 2469{
1904 int i; 2470 int i;
1905 2471
1906 for (i = 0; i < timercnt; ++i) 2472 for (i = 0; i < timercnt; ++i)
… …
1909 ANHE_w (*he)->at += adjust; 2475 ANHE_w (*he)->at += adjust;
1910 ANHE_at_cache (*he); 2476 ANHE_at_cache (*he);
1911 } 2477 }
1912} 2478}
1913 2479
2480/* fetch new monotonic and realtime times from the kernel */
2481/* also detect if there was a timejump, and act accordingly */
1914inline_speed void 2482inline_speed void
1915time_update (EV_P_ ev_tstamp max_block) 2483time_update (EV_P_ ev_tstamp max_block)
1916{ 2484{
1917 int i;
1918
1919#if EV_USE_MONOTONIC 2485#if EV_USE_MONOTONIC
1920 if (expect_true (have_monotonic)) 2486 if (expect_true (have_monotonic))
1921 { 2487 {
2488 int i;
1922 ev_tstamp odiff = rtmn_diff; 2489 ev_tstamp odiff = rtmn_diff;
1923 2490
1924 mn_now = get_clock (); 2491 mn_now = get_clock ();
1925 2492
1926 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2493 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1942 * doesn't hurt either as we only do this on time-jumps or 2509 * doesn't hurt either as we only do this on time-jumps or
1943 * in the unlikely event of having been preempted here. 2510 * in the unlikely event of having been preempted here.
1944 */ 2511 */
1945 for (i = 4; --i; ) 2512 for (i = 4; --i; )
1946 { 2513 {
2514 ev_tstamp diff;
1947 rtmn_diff = ev_rt_now - mn_now; 2515 rtmn_diff = ev_rt_now - mn_now;
1948 2516
2517 diff = odiff - rtmn_diff;
2518
1949 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2519 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1950 return; /* all is well */ 2520 return; /* all is well */
1951 2521
1952 ev_rt_now = ev_time (); 2522 ev_rt_now = ev_time ();
1953 mn_now = get_clock (); 2523 mn_now = get_clock ();
1954 now_floor = mn_now; 2524 now_floor = mn_now;
… …
1976 2546
1977 mn_now = ev_rt_now; 2547 mn_now = ev_rt_now;
1978 } 2548 }
1979} 2549}
1980 2550
1981static int loop_done;
1982
1983void 2551void
1984ev_loop (EV_P_ int flags) 2552ev_run (EV_P_ int flags)
1985{ 2553{
2554#if EV_FEATURE_API
2555 ++loop_depth;
2556#endif
2557
2558 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2559
1986 loop_done = EVUNLOOP_CANCEL; 2560 loop_done = EVBREAK_CANCEL;
1987 2561
1988 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2562 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1989 2563
1990 do 2564 do
1991 { 2565 {
1992#if EV_VERIFY >= 2 2566#if EV_VERIFY >= 2
1993 ev_loop_verify (EV_A); 2567 ev_verify (EV_A);
1994#endif 2568#endif
1995 2569
1996#ifndef _WIN32 2570#ifndef _WIN32
1997 if (expect_false (curpid)) /* penalise the forking check even more */ 2571 if (expect_false (curpid)) /* penalise the forking check even more */
1998 if (expect_false (getpid () != curpid)) 2572 if (expect_false (getpid () != curpid))
… …
2006 /* we might have forked, so queue fork handlers */ 2580 /* we might have forked, so queue fork handlers */
2007 if (expect_false (postfork)) 2581 if (expect_false (postfork))
2008 if (forkcnt) 2582 if (forkcnt)
2009 { 2583 {
2010 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2584 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2011 call_pending (EV_A); 2585 EV_INVOKE_PENDING;
2012 } 2586 }
2013#endif 2587#endif
2014 2588
2589#if EV_PREPARE_ENABLE
2015 /* queue prepare watchers (and execute them) */ 2590 /* queue prepare watchers (and execute them) */
2016 if (expect_false (preparecnt)) 2591 if (expect_false (preparecnt))
2017 { 2592 {
2018 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2593 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2019 call_pending (EV_A); 2594 EV_INVOKE_PENDING;
2020 } 2595 }
2596#endif
2597
2598 if (expect_false (loop_done))
2599 break;
2021 2600
2022 /* we might have forked, so reify kernel state if necessary */ 2601 /* we might have forked, so reify kernel state if necessary */
2023 if (expect_false (postfork)) 2602 if (expect_false (postfork))
2024 loop_fork (EV_A); 2603 loop_fork (EV_A);
2025 2604
… …
2029 /* calculate blocking time */ 2608 /* calculate blocking time */
2030 { 2609 {
2031 ev_tstamp waittime = 0.; 2610 ev_tstamp waittime = 0.;
2032 ev_tstamp sleeptime = 0.; 2611 ev_tstamp sleeptime = 0.;
2033 2612
2613 /* remember old timestamp for io_blocktime calculation */
2614 ev_tstamp prev_mn_now = mn_now;
2615
2616 /* update time to cancel out callback processing overhead */
2617 time_update (EV_A_ 1e100);
2618
2619 /* from now on, we want a pipe-wake-up */
2620 pipe_write_wanted = 1;
2621
2622 ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
2623
2034 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2624 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2035 { 2625 {
2036 /* update time to cancel out callback processing overhead */ 2626 waittime = MAX_BLOCKTIME;
2037 time_update (EV_A_ 1e100);
2038 2627
2039 if (timercnt) 2628 if (timercnt)
2040 { 2629 {
2041 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2630 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2042 if (waittime > to) waittime = to; 2631 if (waittime > to) waittime = to;
2043 } 2632 }
2044 2633
2045#if EV_PERIODIC_ENABLE 2634#if EV_PERIODIC_ENABLE
2046 if (periodiccnt) 2635 if (periodiccnt)
2047 { 2636 {
2048 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2637 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2049 if (waittime > to) waittime = to; 2638 if (waittime > to) waittime = to;
2050 } 2639 }
2051#endif 2640#endif
2052 2641
2642 /* don't let timeouts decrease the waittime below timeout_blocktime */
2053 if (expect_false (waittime < timeout_blocktime)) 2643 if (expect_false (waittime < timeout_blocktime))
2054 waittime = timeout_blocktime; 2644 waittime = timeout_blocktime;
2055 2645
2056 sleeptime = waittime - backend_fudge; 2646 /* at this point, we NEED to wait, so we have to ensure */
2647 /* to pass a minimum nonzero value to the backend */
2648 if (expect_false (waittime < backend_mintime))
2649 waittime = backend_mintime;
2057 2650
2651 /* extra check because io_blocktime is commonly 0 */
2058 if (expect_true (sleeptime > io_blocktime)) 2652 if (expect_false (io_blocktime))
2059 sleeptime = io_blocktime;
2060
2061 if (sleeptime)
2062 { 2653 {
2654 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2655
2656 if (sleeptime > waittime - backend_mintime)
2657 sleeptime = waittime - backend_mintime;
2658
2659 if (expect_true (sleeptime > 0.))
2660 {
2063 ev_sleep (sleeptime); 2661 ev_sleep (sleeptime);
2064 waittime -= sleeptime; 2662 waittime -= sleeptime;
2663 }
2065 } 2664 }
2066 } 2665 }
2067 2666
2667#if EV_FEATURE_API
2068 ++loop_count; 2668 ++loop_count;
2669#endif
2670 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2069 backend_poll (EV_A_ waittime); 2671 backend_poll (EV_A_ waittime);
2672 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2673
2674 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2675
2676 if (pipe_write_skipped)
2677 {
2678 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2679 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2680 }
2681
2070 2682
2071 /* update ev_rt_now, do magic */ 2683 /* update ev_rt_now, do magic */
2072 time_update (EV_A_ waittime + sleeptime); 2684 time_update (EV_A_ waittime + sleeptime);
2073 } 2685 }
2074 2686
… …
2081#if EV_IDLE_ENABLE 2693#if EV_IDLE_ENABLE
2082 /* queue idle watchers unless other events are pending */ 2694 /* queue idle watchers unless other events are pending */
2083 idle_reify (EV_A); 2695 idle_reify (EV_A);
2084#endif 2696#endif
2085 2697
2698#if EV_CHECK_ENABLE
2086 /* queue check watchers, to be executed first */ 2699 /* queue check watchers, to be executed first */
2087 if (expect_false (checkcnt)) 2700 if (expect_false (checkcnt))
2088 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2701 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2702#endif
2089 2703
2090 call_pending (EV_A); 2704 EV_INVOKE_PENDING;
2091 } 2705 }
2092 while (expect_true ( 2706 while (expect_true (
2093 activecnt 2707 activecnt
2094 && !loop_done 2708 && !loop_done
2095 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2709 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2096 )); 2710 ));
2097 2711
2098 if (loop_done == EVUNLOOP_ONE) 2712 if (loop_done == EVBREAK_ONE)
2099 loop_done = EVUNLOOP_CANCEL; 2713 loop_done = EVBREAK_CANCEL;
2714
2715#if EV_FEATURE_API
2716 --loop_depth;
2717#endif
2100} 2718}
2101 2719
2102void 2720void
2103ev_unloop (EV_P_ int how) 2721ev_break (EV_P_ int how)
2104{ 2722{
2105 loop_done = how; 2723 loop_done = how;
2106} 2724}
2107 2725
2108void 2726void
… …
2133ev_resume (EV_P) 2751ev_resume (EV_P)
2134{ 2752{
2135 ev_tstamp mn_prev = mn_now; 2753 ev_tstamp mn_prev = mn_now;
2136 2754
2137 ev_now_update (EV_A); 2755 ev_now_update (EV_A);
2138 printf ("update %f\n", mn_now - mn_prev);//D
2139 timers_reschedule (EV_A_ mn_now - mn_prev); 2756 timers_reschedule (EV_A_ mn_now - mn_prev);
2757#if EV_PERIODIC_ENABLE
2758 /* TODO: really do this? */
2140 periodics_reschedule (EV_A); 2759 periodics_reschedule (EV_A);
2760#endif
2141} 2761}
2142 2762
2143/*****************************************************************************/ 2763/*****************************************************************************/
2764/* singly-linked list management, used when the expected list length is short */
2144 2765
2145inline_size void 2766inline_size void
2146wlist_add (WL *head, WL elem) 2767wlist_add (WL *head, WL elem)
2147{ 2768{
2148 elem->next = *head; 2769 elem->next = *head;
… …
2152inline_size void 2773inline_size void
2153wlist_del (WL *head, WL elem) 2774wlist_del (WL *head, WL elem)
2154{ 2775{
2155 while (*head) 2776 while (*head)
2156 { 2777 {
2157 if (*head == elem) 2778 if (expect_true (*head == elem))
2158 { 2779 {
2159 *head = elem->next; 2780 *head = elem->next;
2160 return; 2781 break;
2161 } 2782 }
2162 2783
2163 head = &(*head)->next; 2784 head = &(*head)->next;
2164 } 2785 }
2165} 2786}
2166 2787
2788/* internal, faster, version of ev_clear_pending */
2167inline_speed void 2789inline_speed void
2168clear_pending (EV_P_ W w) 2790clear_pending (EV_P_ W w)
2169{ 2791{
2170 if (w->pending) 2792 if (w->pending)
2171 { 2793 {
2172 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2794 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2173 w->pending = 0; 2795 w->pending = 0;
2174 } 2796 }
2175} 2797}
2176 2798
2177int 2799int
… …
2181 int pending = w_->pending; 2803 int pending = w_->pending;
2182 2804
2183 if (expect_true (pending)) 2805 if (expect_true (pending))
2184 { 2806 {
2185 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2807 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2808 p->w = (W)&pending_w;
2186 w_->pending = 0; 2809 w_->pending = 0;
2187 p->w = 0;
2188 return p->events; 2810 return p->events;
2189 } 2811 }
2190 else 2812 else
2191 return 0; 2813 return 0;
2192} 2814}
2193 2815
2194inline_size void 2816inline_size void
2195pri_adjust (EV_P_ W w) 2817pri_adjust (EV_P_ W w)
2196{ 2818{
2197 int pri = w->priority; 2819 int pri = ev_priority (w);
2198 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2820 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2199 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2821 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2200 w->priority = pri; 2822 ev_set_priority (w, pri);
2201} 2823}
2202 2824
2203inline_speed void 2825inline_speed void
2204ev_start (EV_P_ W w, int active) 2826ev_start (EV_P_ W w, int active)
2205{ 2827{
… …
2224 2846
2225 if (expect_false (ev_is_active (w))) 2847 if (expect_false (ev_is_active (w)))
2226 return; 2848 return;
2227 2849
2228 assert (("libev: ev_io_start called with negative fd", fd >= 0)); 2850 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2229 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 2851 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2230 2852
2231 EV_FREQUENT_CHECK; 2853 EV_FREQUENT_CHECK;
2232 2854
2233 ev_start (EV_A_ (W)w, 1); 2855 ev_start (EV_A_ (W)w, 1);
2234 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 2856 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2235 wlist_add (&anfds[fd].head, (WL)w); 2857 wlist_add (&anfds[fd].head, (WL)w);
2236 2858
2237 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1); 2859 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2238 w->events &= ~EV__IOFDSET; 2860 w->events &= ~EV__IOFDSET;
2239 2861
2240 EV_FREQUENT_CHECK; 2862 EV_FREQUENT_CHECK;
2241} 2863}
2242 2864
… …
2252 EV_FREQUENT_CHECK; 2874 EV_FREQUENT_CHECK;
2253 2875
2254 wlist_del (&anfds[w->fd].head, (WL)w); 2876 wlist_del (&anfds[w->fd].head, (WL)w);
2255 ev_stop (EV_A_ (W)w); 2877 ev_stop (EV_A_ (W)w);
2256 2878
2257 fd_change (EV_A_ w->fd, 1); 2879 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2258 2880
2259 EV_FREQUENT_CHECK; 2881 EV_FREQUENT_CHECK;
2260} 2882}
2261 2883
2262void noinline 2884void noinline
… …
2304 timers [active] = timers [timercnt + HEAP0]; 2926 timers [active] = timers [timercnt + HEAP0];
2305 adjustheap (timers, timercnt, active); 2927 adjustheap (timers, timercnt, active);
2306 } 2928 }
2307 } 2929 }
2308 2930
2309 EV_FREQUENT_CHECK;
2310
2311 ev_at (w) -= mn_now; 2931 ev_at (w) -= mn_now;
2312 2932
2313 ev_stop (EV_A_ (W)w); 2933 ev_stop (EV_A_ (W)w);
2934
2935 EV_FREQUENT_CHECK;
2314} 2936}
2315 2937
2316void noinline 2938void noinline
2317ev_timer_again (EV_P_ ev_timer *w) 2939ev_timer_again (EV_P_ ev_timer *w)
2318{ 2940{
… …
2336 } 2958 }
2337 2959
2338 EV_FREQUENT_CHECK; 2960 EV_FREQUENT_CHECK;
2339} 2961}
2340 2962
2963ev_tstamp
2964ev_timer_remaining (EV_P_ ev_timer *w)
2965{
2966 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2967}
2968
2341#if EV_PERIODIC_ENABLE 2969#if EV_PERIODIC_ENABLE
2342void noinline 2970void noinline
2343ev_periodic_start (EV_P_ ev_periodic *w) 2971ev_periodic_start (EV_P_ ev_periodic *w)
2344{ 2972{
2345 if (expect_false (ev_is_active (w))) 2973 if (expect_false (ev_is_active (w)))
… …
2348 if (w->reschedule_cb) 2976 if (w->reschedule_cb)
2349 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2977 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2350 else if (w->interval) 2978 else if (w->interval)
2351 { 2979 {
2352 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2980 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2353 /* this formula differs from the one in periodic_reify because we do not always round up */ 2981 periodic_recalc (EV_A_ w);
2354 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2355 } 2982 }
2356 else 2983 else
2357 ev_at (w) = w->offset; 2984 ev_at (w) = w->offset;
2358 2985
2359 EV_FREQUENT_CHECK; 2986 EV_FREQUENT_CHECK;
… …
2391 periodics [active] = periodics [periodiccnt + HEAP0]; 3018 periodics [active] = periodics [periodiccnt + HEAP0];
2392 adjustheap (periodics, periodiccnt, active); 3019 adjustheap (periodics, periodiccnt, active);
2393 } 3020 }
2394 } 3021 }
2395 3022
2396 EV_FREQUENT_CHECK;
2397
2398 ev_stop (EV_A_ (W)w); 3023 ev_stop (EV_A_ (W)w);
3024
3025 EV_FREQUENT_CHECK;
2399} 3026}
2400 3027
2401void noinline 3028void noinline
2402ev_periodic_again (EV_P_ ev_periodic *w) 3029ev_periodic_again (EV_P_ ev_periodic *w)
2403{ 3030{
… …
2409 3036
2410#ifndef SA_RESTART 3037#ifndef SA_RESTART
2411# define SA_RESTART 0 3038# define SA_RESTART 0
2412#endif 3039#endif
2413 3040
3041#if EV_SIGNAL_ENABLE
3042
2414void noinline 3043void noinline
2415ev_signal_start (EV_P_ ev_signal *w) 3044ev_signal_start (EV_P_ ev_signal *w)
2416{ 3045{
2417#if EV_MULTIPLICITY
2418 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2419#endif
2420 if (expect_false (ev_is_active (w))) 3046 if (expect_false (ev_is_active (w)))
2421 return; 3047 return;
2422 3048
2423 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0)); 3049 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2424 3050
2425 evpipe_init (EV_A); 3051#if EV_MULTIPLICITY
3052 assert (("libev: a signal must not be attached to two different loops",
3053 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2426 3054
2427 EV_FREQUENT_CHECK; 3055 signals [w->signum - 1].loop = EV_A;
3056#endif
2428 3057
3058 EV_FREQUENT_CHECK;
3059
3060#if EV_USE_SIGNALFD
3061 if (sigfd == -2)
2429 { 3062 {
2430#ifndef _WIN32 3063 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2431 sigset_t full, prev; 3064 if (sigfd < 0 && errno == EINVAL)
2432 sigfillset (&full); 3065 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2433 sigprocmask (SIG_SETMASK, &full, &prev);
2434#endif
2435 3066
2436 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 3067 if (sigfd >= 0)
3068 {
3069 fd_intern (sigfd); /* doing it twice will not hurt */
2437 3070
2438#ifndef _WIN32 3071 sigemptyset (&sigfd_set);
2439 sigprocmask (SIG_SETMASK, &prev, 0); 3072
2440#endif 3073 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3074 ev_set_priority (&sigfd_w, EV_MAXPRI);
3075 ev_io_start (EV_A_ &sigfd_w);
3076 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3077 }
2441 } 3078 }
3079
3080 if (sigfd >= 0)
3081 {
3082 /* TODO: check .head */
3083 sigaddset (&sigfd_set, w->signum);
3084 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3085
3086 signalfd (sigfd, &sigfd_set, 0);
3087 }
3088#endif
2442 3089
2443 ev_start (EV_A_ (W)w, 1); 3090 ev_start (EV_A_ (W)w, 1);
2444 wlist_add (&signals [w->signum - 1].head, (WL)w); 3091 wlist_add (&signals [w->signum - 1].head, (WL)w);
2445 3092
2446 if (!((WL)w)->next) 3093 if (!((WL)w)->next)
3094# if EV_USE_SIGNALFD
3095 if (sigfd < 0) /*TODO*/
3096# endif
2447 { 3097 {
2448#if _WIN32 3098# ifdef _WIN32
3099 evpipe_init (EV_A);
3100
2449 signal (w->signum, ev_sighandler); 3101 signal (w->signum, ev_sighandler);
2450#else 3102# else
2451 struct sigaction sa; 3103 struct sigaction sa;
3104
3105 evpipe_init (EV_A);
3106
2452 sa.sa_handler = ev_sighandler; 3107 sa.sa_handler = ev_sighandler;
2453 sigfillset (&sa.sa_mask); 3108 sigfillset (&sa.sa_mask);
2454 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3109 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2455 sigaction (w->signum, &sa, 0); 3110 sigaction (w->signum, &sa, 0);
3111
3112 if (origflags & EVFLAG_NOSIGMASK)
3113 {
3114 sigemptyset (&sa.sa_mask);
3115 sigaddset (&sa.sa_mask, w->signum);
3116 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3117 }
2456#endif 3118#endif
2457 } 3119 }
2458 3120
2459 EV_FREQUENT_CHECK; 3121 EV_FREQUENT_CHECK;
2460} 3122}
2461 3123
2462void noinline 3124void noinline
… …
2470 3132
2471 wlist_del (&signals [w->signum - 1].head, (WL)w); 3133 wlist_del (&signals [w->signum - 1].head, (WL)w);
2472 ev_stop (EV_A_ (W)w); 3134 ev_stop (EV_A_ (W)w);
2473 3135
2474 if (!signals [w->signum - 1].head) 3136 if (!signals [w->signum - 1].head)
3137 {
3138#if EV_MULTIPLICITY
3139 signals [w->signum - 1].loop = 0; /* unattach from signal */
3140#endif
3141#if EV_USE_SIGNALFD
3142 if (sigfd >= 0)
3143 {
3144 sigset_t ss;
3145
3146 sigemptyset (&ss);
3147 sigaddset (&ss, w->signum);
3148 sigdelset (&sigfd_set, w->signum);
3149
3150 signalfd (sigfd, &sigfd_set, 0);
3151 sigprocmask (SIG_UNBLOCK, &ss, 0);
3152 }
3153 else
3154#endif
2475 signal (w->signum, SIG_DFL); 3155 signal (w->signum, SIG_DFL);
3156 }
2476 3157
2477 EV_FREQUENT_CHECK; 3158 EV_FREQUENT_CHECK;
2478} 3159}
3160
3161#endif
3162
3163#if EV_CHILD_ENABLE
2479 3164
2480void 3165void
2481ev_child_start (EV_P_ ev_child *w) 3166ev_child_start (EV_P_ ev_child *w)
2482{ 3167{
2483#if EV_MULTIPLICITY 3168#if EV_MULTIPLICITY
… …
2487 return; 3172 return;
2488 3173
2489 EV_FREQUENT_CHECK; 3174 EV_FREQUENT_CHECK;
2490 3175
2491 ev_start (EV_A_ (W)w, 1); 3176 ev_start (EV_A_ (W)w, 1);
2492 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3177 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2493 3178
2494 EV_FREQUENT_CHECK; 3179 EV_FREQUENT_CHECK;
2495} 3180}
2496 3181
2497void 3182void
… …
2501 if (expect_false (!ev_is_active (w))) 3186 if (expect_false (!ev_is_active (w)))
2502 return; 3187 return;
2503 3188
2504 EV_FREQUENT_CHECK; 3189 EV_FREQUENT_CHECK;
2505 3190
2506 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3191 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2507 ev_stop (EV_A_ (W)w); 3192 ev_stop (EV_A_ (W)w);
2508 3193
2509 EV_FREQUENT_CHECK; 3194 EV_FREQUENT_CHECK;
2510} 3195}
3196
3197#endif
2511 3198
2512#if EV_STAT_ENABLE 3199#if EV_STAT_ENABLE
2513 3200
2514# ifdef _WIN32 3201# ifdef _WIN32
2515# undef lstat 3202# undef lstat
… …
2521#define MIN_STAT_INTERVAL 0.1074891 3208#define MIN_STAT_INTERVAL 0.1074891
2522 3209
2523static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3210static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2524 3211
2525#if EV_USE_INOTIFY 3212#if EV_USE_INOTIFY
2526# define EV_INOTIFY_BUFSIZE 8192 3213
3214/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3215# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2527 3216
2528static void noinline 3217static void noinline
2529infy_add (EV_P_ ev_stat *w) 3218infy_add (EV_P_ ev_stat *w)
2530{ 3219{
2531 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); 3220 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);
2532 3221
2533 if (w->wd < 0) 3222 if (w->wd >= 0)
3223 {
3224 struct statfs sfs;
3225
3226 /* now local changes will be tracked by inotify, but remote changes won't */
3227 /* unless the filesystem is known to be local, we therefore still poll */
3228 /* also do poll on <2.6.25, but with normal frequency */
3229
3230 if (!fs_2625)
3231 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3232 else if (!statfs (w->path, &sfs)
3233 && (sfs.f_type == 0x1373 /* devfs */
3234 || sfs.f_type == 0xEF53 /* ext2/3 */
3235 || sfs.f_type == 0x3153464a /* jfs */
3236 || sfs.f_type == 0x52654973 /* reiser3 */
3237 || sfs.f_type == 0x01021994 /* tempfs */
3238 || sfs.f_type == 0x58465342 /* xfs */))
3239 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3240 else
3241 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2534 { 3242 }
3243 else
3244 {
3245 /* can't use inotify, continue to stat */
2535 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3246 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2536 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2537 3247
2538 /* monitor some parent directory for speedup hints */ 3248 /* if path is not there, monitor some parent directory for speedup hints */
2539 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 3249 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2540 /* but an efficiency issue only */ 3250 /* but an efficiency issue only */
2541 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3251 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2542 { 3252 {
2543 char path [4096]; 3253 char path [4096];
… …
2553 if (!pend || pend == path) 3263 if (!pend || pend == path)
2554 break; 3264 break;
2555 3265
2556 *pend = 0; 3266 *pend = 0;
2557 w->wd = inotify_add_watch (fs_fd, path, mask); 3267 w->wd = inotify_add_watch (fs_fd, path, mask);
2558 } 3268 }
2559 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3269 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2560 } 3270 }
2561 } 3271 }
2562 3272
2563 if (w->wd >= 0) 3273 if (w->wd >= 0)
2564 {
2565 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3274 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2566 3275
2567 /* now local changes will be tracked by inotify, but remote changes won't */ 3276 /* now re-arm timer, if required */
2568 /* unless the filesystem it known to be local, we therefore still poll */ 3277 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2569 /* also do poll on <2.6.25, but with normal frequency */
2570 struct statfs sfs;
2571
2572 if (fs_2625 && !statfs (w->path, &sfs))
2573 if (sfs.f_type == 0x1373 /* devfs */
2574 || sfs.f_type == 0xEF53 /* ext2/3 */
2575 || sfs.f_type == 0x3153464a /* jfs */
2576 || sfs.f_type == 0x52654973 /* reiser3 */
2577 || sfs.f_type == 0x01021994 /* tempfs */
2578 || sfs.f_type == 0x58465342 /* xfs */)
2579 return;
2580
2581 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2582 ev_timer_again (EV_A_ &w->timer); 3278 ev_timer_again (EV_A_ &w->timer);
2583 } 3279 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2584} 3280}
2585 3281
2586static void noinline 3282static void noinline
2587infy_del (EV_P_ ev_stat *w) 3283infy_del (EV_P_ ev_stat *w)
2588{ 3284{
… …
2591 3287
2592 if (wd < 0) 3288 if (wd < 0)
2593 return; 3289 return;
2594 3290
2595 w->wd = -2; 3291 w->wd = -2;
2596 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3292 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2597 wlist_del (&fs_hash [slot].head, (WL)w); 3293 wlist_del (&fs_hash [slot].head, (WL)w);
2598 3294
2599 /* remove this watcher, if others are watching it, they will rearm */ 3295 /* remove this watcher, if others are watching it, they will rearm */
2600 inotify_rm_watch (fs_fd, wd); 3296 inotify_rm_watch (fs_fd, wd);
2601} 3297}
… …
2603static void noinline 3299static void noinline
2604infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3300infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2605{ 3301{
2606 if (slot < 0) 3302 if (slot < 0)
2607 /* overflow, need to check for all hash slots */ 3303 /* overflow, need to check for all hash slots */
2608 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3304 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2609 infy_wd (EV_A_ slot, wd, ev); 3305 infy_wd (EV_A_ slot, wd, ev);
2610 else 3306 else
2611 { 3307 {
2612 WL w_; 3308 WL w_;
2613 3309
2614 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3310 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2615 { 3311 {
2616 ev_stat *w = (ev_stat *)w_; 3312 ev_stat *w = (ev_stat *)w_;
2617 w_ = w_->next; /* lets us remove this watcher and all before it */ 3313 w_ = w_->next; /* lets us remove this watcher and all before it */
2618 3314
2619 if (w->wd == wd || wd == -1) 3315 if (w->wd == wd || wd == -1)
2620 { 3316 {
2621 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3317 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2622 { 3318 {
2623 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3319 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2624 w->wd = -1; 3320 w->wd = -1;
2625 infy_add (EV_A_ w); /* re-add, no matter what */ 3321 infy_add (EV_A_ w); /* re-add, no matter what */
2626 } 3322 }
2627 3323
2628 stat_timer_cb (EV_A_ &w->timer, 0); 3324 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2633 3329
2634static void 3330static void
2635infy_cb (EV_P_ ev_io *w, int revents) 3331infy_cb (EV_P_ ev_io *w, int revents)
2636{ 3332{
2637 char buf [EV_INOTIFY_BUFSIZE]; 3333 char buf [EV_INOTIFY_BUFSIZE];
2638 struct inotify_event *ev = (struct inotify_event *)buf;
2639 int ofs; 3334 int ofs;
2640 int len = read (fs_fd, buf, sizeof (buf)); 3335 int len = read (fs_fd, buf, sizeof (buf));
2641 3336
2642 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3337 for (ofs = 0; ofs < len; )
3338 {
3339 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2643 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3340 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3341 ofs += sizeof (struct inotify_event) + ev->len;
3342 }
2644} 3343}
2645 3344
2646inline_size void 3345inline_size void ecb_cold
2647check_2625 (EV_P) 3346ev_check_2625 (EV_P)
2648{ 3347{
2649 /* kernels < 2.6.25 are borked 3348 /* kernels < 2.6.25 are borked
2650 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3349 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2651 */ 3350 */
2652 struct utsname buf; 3351 if (ev_linux_version () < 0x020619)
2653 int major, minor, micro;
2654
2655 if (uname (&buf))
2656 return; 3352 return;
2657 3353
2658 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2659 return;
2660
2661 if (major < 2
2662 || (major == 2 && minor < 6)
2663 || (major == 2 && minor == 6 && micro < 25))
2664 return;
2665
2666 fs_2625 = 1; 3354 fs_2625 = 1;
3355}
3356
3357inline_size int
3358infy_newfd (void)
3359{
3360#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3361 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3362 if (fd >= 0)
3363 return fd;
3364#endif
3365 return inotify_init ();
2667} 3366}
2668 3367
2669inline_size void 3368inline_size void
2670infy_init (EV_P) 3369infy_init (EV_P)
2671{ 3370{
2672 if (fs_fd != -2) 3371 if (fs_fd != -2)
2673 return; 3372 return;
2674 3373
2675 fs_fd = -1; 3374 fs_fd = -1;
2676 3375
2677 check_2625 (EV_A); 3376 ev_check_2625 (EV_A);
2678 3377
2679 fs_fd = inotify_init (); 3378 fs_fd = infy_newfd ();
2680 3379
2681 if (fs_fd >= 0) 3380 if (fs_fd >= 0)
2682 { 3381 {
3382 fd_intern (fs_fd);
2683 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3383 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2684 ev_set_priority (&fs_w, EV_MAXPRI); 3384 ev_set_priority (&fs_w, EV_MAXPRI);
2685 ev_io_start (EV_A_ &fs_w); 3385 ev_io_start (EV_A_ &fs_w);
3386 ev_unref (EV_A);
2686 } 3387 }
2687} 3388}
2688 3389
2689inline_size void 3390inline_size void
2690infy_fork (EV_P) 3391infy_fork (EV_P)
… …
2692 int slot; 3393 int slot;
2693 3394
2694 if (fs_fd < 0) 3395 if (fs_fd < 0)
2695 return; 3396 return;
2696 3397
3398 ev_ref (EV_A);
3399 ev_io_stop (EV_A_ &fs_w);
2697 close (fs_fd); 3400 close (fs_fd);
2698 fs_fd = inotify_init (); 3401 fs_fd = infy_newfd ();
2699 3402
3403 if (fs_fd >= 0)
3404 {
3405 fd_intern (fs_fd);
3406 ev_io_set (&fs_w, fs_fd, EV_READ);
3407 ev_io_start (EV_A_ &fs_w);
3408 ev_unref (EV_A);
3409 }
3410
2700 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3411 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2701 { 3412 {
2702 WL w_ = fs_hash [slot].head; 3413 WL w_ = fs_hash [slot].head;
2703 fs_hash [slot].head = 0; 3414 fs_hash [slot].head = 0;
2704 3415
2705 while (w_) 3416 while (w_)
… …
2710 w->wd = -1; 3421 w->wd = -1;
2711 3422
2712 if (fs_fd >= 0) 3423 if (fs_fd >= 0)
2713 infy_add (EV_A_ w); /* re-add, no matter what */ 3424 infy_add (EV_A_ w); /* re-add, no matter what */
2714 else 3425 else
3426 {
3427 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3428 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2715 ev_timer_again (EV_A_ &w->timer); 3429 ev_timer_again (EV_A_ &w->timer);
3430 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3431 }
2716 } 3432 }
2717 } 3433 }
2718} 3434}
2719 3435
2720#endif 3436#endif
… …
2737static void noinline 3453static void noinline
2738stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3454stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2739{ 3455{
2740 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3456 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2741 3457
2742 /* we copy this here each the time so that */ 3458 ev_statdata prev = w->attr;
2743 /* prev has the old value when the callback gets invoked */
2744 w->prev = w->attr;
2745 ev_stat_stat (EV_A_ w); 3459 ev_stat_stat (EV_A_ w);
2746 3460
2747 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3461 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2748 if ( 3462 if (
2749 w->prev.st_dev != w->attr.st_dev 3463 prev.st_dev != w->attr.st_dev
2750 || w->prev.st_ino != w->attr.st_ino 3464 || prev.st_ino != w->attr.st_ino
2751 || w->prev.st_mode != w->attr.st_mode 3465 || prev.st_mode != w->attr.st_mode
2752 || w->prev.st_nlink != w->attr.st_nlink 3466 || prev.st_nlink != w->attr.st_nlink
2753 || w->prev.st_uid != w->attr.st_uid 3467 || prev.st_uid != w->attr.st_uid
2754 || w->prev.st_gid != w->attr.st_gid 3468 || prev.st_gid != w->attr.st_gid
2755 || w->prev.st_rdev != w->attr.st_rdev 3469 || prev.st_rdev != w->attr.st_rdev
2756 || w->prev.st_size != w->attr.st_size 3470 || prev.st_size != w->attr.st_size
2757 || w->prev.st_atime != w->attr.st_atime 3471 || prev.st_atime != w->attr.st_atime
2758 || w->prev.st_mtime != w->attr.st_mtime 3472 || prev.st_mtime != w->attr.st_mtime
2759 || w->prev.st_ctime != w->attr.st_ctime 3473 || prev.st_ctime != w->attr.st_ctime
2760 ) { 3474 ) {
3475 /* we only update w->prev on actual differences */
3476 /* in case we test more often than invoke the callback, */
3477 /* to ensure that prev is always different to attr */
3478 w->prev = prev;
3479
2761 #if EV_USE_INOTIFY 3480 #if EV_USE_INOTIFY
2762 if (fs_fd >= 0) 3481 if (fs_fd >= 0)
2763 { 3482 {
2764 infy_del (EV_A_ w); 3483 infy_del (EV_A_ w);
2765 infy_add (EV_A_ w); 3484 infy_add (EV_A_ w);
… …
2790 3509
2791 if (fs_fd >= 0) 3510 if (fs_fd >= 0)
2792 infy_add (EV_A_ w); 3511 infy_add (EV_A_ w);
2793 else 3512 else
2794#endif 3513#endif
3514 {
2795 ev_timer_again (EV_A_ &w->timer); 3515 ev_timer_again (EV_A_ &w->timer);
3516 ev_unref (EV_A);
3517 }
2796 3518
2797 ev_start (EV_A_ (W)w, 1); 3519 ev_start (EV_A_ (W)w, 1);
2798 3520
2799 EV_FREQUENT_CHECK; 3521 EV_FREQUENT_CHECK;
2800} 3522}
… …
2809 EV_FREQUENT_CHECK; 3531 EV_FREQUENT_CHECK;
2810 3532
2811#if EV_USE_INOTIFY 3533#if EV_USE_INOTIFY
2812 infy_del (EV_A_ w); 3534 infy_del (EV_A_ w);
2813#endif 3535#endif
3536
3537 if (ev_is_active (&w->timer))
3538 {
3539 ev_ref (EV_A);
2814 ev_timer_stop (EV_A_ &w->timer); 3540 ev_timer_stop (EV_A_ &w->timer);
3541 }
2815 3542
2816 ev_stop (EV_A_ (W)w); 3543 ev_stop (EV_A_ (W)w);
2817 3544
2818 EV_FREQUENT_CHECK; 3545 EV_FREQUENT_CHECK;
2819} 3546}
… …
2864 3591
2865 EV_FREQUENT_CHECK; 3592 EV_FREQUENT_CHECK;
2866} 3593}
2867#endif 3594#endif
2868 3595
3596#if EV_PREPARE_ENABLE
2869void 3597void
2870ev_prepare_start (EV_P_ ev_prepare *w) 3598ev_prepare_start (EV_P_ ev_prepare *w)
2871{ 3599{
2872 if (expect_false (ev_is_active (w))) 3600 if (expect_false (ev_is_active (w)))
2873 return; 3601 return;
… …
2899 3627
2900 ev_stop (EV_A_ (W)w); 3628 ev_stop (EV_A_ (W)w);
2901 3629
2902 EV_FREQUENT_CHECK; 3630 EV_FREQUENT_CHECK;
2903} 3631}
3632#endif
2904 3633
3634#if EV_CHECK_ENABLE
2905void 3635void
2906ev_check_start (EV_P_ ev_check *w) 3636ev_check_start (EV_P_ ev_check *w)
2907{ 3637{
2908 if (expect_false (ev_is_active (w))) 3638 if (expect_false (ev_is_active (w)))
2909 return; 3639 return;
… …
2935 3665
2936 ev_stop (EV_A_ (W)w); 3666 ev_stop (EV_A_ (W)w);
2937 3667
2938 EV_FREQUENT_CHECK; 3668 EV_FREQUENT_CHECK;
2939} 3669}
3670#endif
2940 3671
2941#if EV_EMBED_ENABLE 3672#if EV_EMBED_ENABLE
2942void noinline 3673void noinline
2943ev_embed_sweep (EV_P_ ev_embed *w) 3674ev_embed_sweep (EV_P_ ev_embed *w)
2944{ 3675{
2945 ev_loop (w->other, EVLOOP_NONBLOCK); 3676 ev_run (w->other, EVRUN_NOWAIT);
2946} 3677}
2947 3678
2948static void 3679static void
2949embed_io_cb (EV_P_ ev_io *io, int revents) 3680embed_io_cb (EV_P_ ev_io *io, int revents)
2950{ 3681{
2951 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3682 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2952 3683
2953 if (ev_cb (w)) 3684 if (ev_cb (w))
2954 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3685 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2955 else 3686 else
2956 ev_loop (w->other, EVLOOP_NONBLOCK); 3687 ev_run (w->other, EVRUN_NOWAIT);
2957} 3688}
2958 3689
2959static void 3690static void
2960embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3691embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2961{ 3692{
2962 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3693 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2963 3694
2964 { 3695 {
2965 struct ev_loop *loop = w->other; 3696 EV_P = w->other;
2966 3697
2967 while (fdchangecnt) 3698 while (fdchangecnt)
2968 { 3699 {
2969 fd_reify (EV_A); 3700 fd_reify (EV_A);
2970 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3701 ev_run (EV_A_ EVRUN_NOWAIT);
2971 } 3702 }
2972 } 3703 }
2973} 3704}
2974 3705
2975static void 3706static void
… …
2978 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 3709 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2979 3710
2980 ev_embed_stop (EV_A_ w); 3711 ev_embed_stop (EV_A_ w);
2981 3712
2982 { 3713 {
2983 struct ev_loop *loop = w->other; 3714 EV_P = w->other;
2984 3715
2985 ev_loop_fork (EV_A); 3716 ev_loop_fork (EV_A);
2986 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3717 ev_run (EV_A_ EVRUN_NOWAIT);
2987 } 3718 }
2988 3719
2989 ev_embed_start (EV_A_ w); 3720 ev_embed_start (EV_A_ w);
2990} 3721}
2991 3722
… …
3002{ 3733{
3003 if (expect_false (ev_is_active (w))) 3734 if (expect_false (ev_is_active (w)))
3004 return; 3735 return;
3005 3736
3006 { 3737 {
3007 struct ev_loop *loop = w->other; 3738 EV_P = w->other;
3008 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3739 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3009 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3740 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3010 } 3741 }
3011 3742
3012 EV_FREQUENT_CHECK; 3743 EV_FREQUENT_CHECK;
… …
3039 3770
3040 ev_io_stop (EV_A_ &w->io); 3771 ev_io_stop (EV_A_ &w->io);
3041 ev_prepare_stop (EV_A_ &w->prepare); 3772 ev_prepare_stop (EV_A_ &w->prepare);
3042 ev_fork_stop (EV_A_ &w->fork); 3773 ev_fork_stop (EV_A_ &w->fork);
3043 3774
3775 ev_stop (EV_A_ (W)w);
3776
3044 EV_FREQUENT_CHECK; 3777 EV_FREQUENT_CHECK;
3045} 3778}
3046#endif 3779#endif
3047 3780
3048#if EV_FORK_ENABLE 3781#if EV_FORK_ENABLE
… …
3081 3814
3082 EV_FREQUENT_CHECK; 3815 EV_FREQUENT_CHECK;
3083} 3816}
3084#endif 3817#endif
3085 3818
3819#if EV_CLEANUP_ENABLE
3820void
3821ev_cleanup_start (EV_P_ ev_cleanup *w)
3822{
3823 if (expect_false (ev_is_active (w)))
3824 return;
3825
3826 EV_FREQUENT_CHECK;
3827
3828 ev_start (EV_A_ (W)w, ++cleanupcnt);
3829 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3830 cleanups [cleanupcnt - 1] = w;
3831
3832 /* cleanup watchers should never keep a refcount on the loop */
3833 ev_unref (EV_A);
3834 EV_FREQUENT_CHECK;
3835}
3836
3837void
3838ev_cleanup_stop (EV_P_ ev_cleanup *w)
3839{
3840 clear_pending (EV_A_ (W)w);
3841 if (expect_false (!ev_is_active (w)))
3842 return;
3843
3844 EV_FREQUENT_CHECK;
3845 ev_ref (EV_A);
3846
3847 {
3848 int active = ev_active (w);
3849
3850 cleanups [active - 1] = cleanups [--cleanupcnt];
3851 ev_active (cleanups [active - 1]) = active;
3852 }
3853
3854 ev_stop (EV_A_ (W)w);
3855
3856 EV_FREQUENT_CHECK;
3857}
3858#endif
3859
3086#if EV_ASYNC_ENABLE 3860#if EV_ASYNC_ENABLE
3087void 3861void
3088ev_async_start (EV_P_ ev_async *w) 3862ev_async_start (EV_P_ ev_async *w)
3089{ 3863{
3090 if (expect_false (ev_is_active (w))) 3864 if (expect_false (ev_is_active (w)))
3091 return; 3865 return;
3092 3866
3867 w->sent = 0;
3868
3093 evpipe_init (EV_A); 3869 evpipe_init (EV_A);
3094 3870
3095 EV_FREQUENT_CHECK; 3871 EV_FREQUENT_CHECK;
3096 3872
3097 ev_start (EV_A_ (W)w, ++asynccnt); 3873 ev_start (EV_A_ (W)w, ++asynccnt);
… …
3124 3900
3125void 3901void
3126ev_async_send (EV_P_ ev_async *w) 3902ev_async_send (EV_P_ ev_async *w)
3127{ 3903{
3128 w->sent = 1; 3904 w->sent = 1;
3129 evpipe_write (EV_A_ &gotasync); 3905 evpipe_write (EV_A_ &async_pending);
3130} 3906}
3131#endif 3907#endif
3132 3908
3133/*****************************************************************************/ 3909/*****************************************************************************/
3134 3910
… …
3174{ 3950{
3175 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3951 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3176 3952
3177 if (expect_false (!once)) 3953 if (expect_false (!once))
3178 { 3954 {
3179 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3955 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3180 return; 3956 return;
3181 } 3957 }
3182 3958
3183 once->cb = cb; 3959 once->cb = cb;
3184 once->arg = arg; 3960 once->arg = arg;
… …
3198 } 3974 }
3199} 3975}
3200 3976
3201/*****************************************************************************/ 3977/*****************************************************************************/
3202 3978
3203#if 0 3979#if EV_WALK_ENABLE
3204void 3980void ecb_cold
3205ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 3981ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3206{ 3982{
3207 int i, j; 3983 int i, j;
3208 ev_watcher_list *wl, *wn; 3984 ev_watcher_list *wl, *wn;
3209 3985
… …
3224#if EV_USE_INOTIFY 4000#if EV_USE_INOTIFY
3225 if (ev_cb ((ev_io *)wl) == infy_cb) 4001 if (ev_cb ((ev_io *)wl) == infy_cb)
3226 ; 4002 ;
3227 else 4003 else
3228#endif 4004#endif
3229 if ((ev_io *)wl != &pipeev) 4005 if ((ev_io *)wl != &pipe_w)
3230 if (types & EV_IO) 4006 if (types & EV_IO)
3231 cb (EV_A_ EV_IO, wl); 4007 cb (EV_A_ EV_IO, wl);
3232 4008
3233 wl = wn; 4009 wl = wn;
3234 } 4010 }
… …
3271 if (types & EV_ASYNC) 4047 if (types & EV_ASYNC)
3272 for (i = asynccnt; i--; ) 4048 for (i = asynccnt; i--; )
3273 cb (EV_A_ EV_ASYNC, asyncs [i]); 4049 cb (EV_A_ EV_ASYNC, asyncs [i]);
3274#endif 4050#endif
3275 4051
4052#if EV_PREPARE_ENABLE
3276 if (types & EV_PREPARE) 4053 if (types & EV_PREPARE)
3277 for (i = preparecnt; i--; ) 4054 for (i = preparecnt; i--; )
3278#if EV_EMBED_ENABLE 4055# if EV_EMBED_ENABLE
3279 if (ev_cb (prepares [i]) != embed_prepare_cb) 4056 if (ev_cb (prepares [i]) != embed_prepare_cb)
3280#endif 4057# endif
3281 cb (EV_A_ EV_PREPARE, prepares [i]); 4058 cb (EV_A_ EV_PREPARE, prepares [i]);
4059#endif
3282 4060
4061#if EV_CHECK_ENABLE
3283 if (types & EV_CHECK) 4062 if (types & EV_CHECK)
3284 for (i = checkcnt; i--; ) 4063 for (i = checkcnt; i--; )
3285 cb (EV_A_ EV_CHECK, checks [i]); 4064 cb (EV_A_ EV_CHECK, checks [i]);
4065#endif
3286 4066
4067#if EV_SIGNAL_ENABLE
3287 if (types & EV_SIGNAL) 4068 if (types & EV_SIGNAL)
3288 for (i = 0; i < signalmax; ++i) 4069 for (i = 0; i < EV_NSIG - 1; ++i)
3289 for (wl = signals [i].head; wl; ) 4070 for (wl = signals [i].head; wl; )
3290 { 4071 {
3291 wn = wl->next; 4072 wn = wl->next;
3292 cb (EV_A_ EV_SIGNAL, wl); 4073 cb (EV_A_ EV_SIGNAL, wl);
3293 wl = wn; 4074 wl = wn;
3294 } 4075 }
4076#endif
3295 4077
4078#if EV_CHILD_ENABLE
3296 if (types & EV_CHILD) 4079 if (types & EV_CHILD)
3297 for (i = EV_PID_HASHSIZE; i--; ) 4080 for (i = (EV_PID_HASHSIZE); i--; )
3298 for (wl = childs [i]; wl; ) 4081 for (wl = childs [i]; wl; )
3299 { 4082 {
3300 wn = wl->next; 4083 wn = wl->next;
3301 cb (EV_A_ EV_CHILD, wl); 4084 cb (EV_A_ EV_CHILD, wl);
3302 wl = wn; 4085 wl = wn;
3303 } 4086 }
4087#endif
3304/* EV_STAT 0x00001000 /* stat data changed */ 4088/* EV_STAT 0x00001000 /* stat data changed */
3305/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ 4089/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3306} 4090}
3307#endif 4091#endif
3308 4092
3309#if EV_MULTIPLICITY 4093#if EV_MULTIPLICITY
3310 #include "ev_wrap.h" 4094 #include "ev_wrap.h"
3311#endif 4095#endif
3312 4096
3313#ifdef __cplusplus 4097EV_CPP(})
3314}
3315#endif
3316 4098

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