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Comparing libev/ev.c (file contents):
Revision 1.230 by root, Fri May 2 08:13:16 2008 UTC vs.
Revision 1.382 by sf-exg, Thu Jun 30 13:13:59 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
51 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
130# endif 154# endif
131 155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
132#endif 163# endif
164
165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# include "ev.h" 185# include "ev.h"
152#endif 186#endif
187
188EV_CPP(extern "C" {)
153 189
154#ifndef _WIN32 190#ifndef _WIN32
155# include <sys/time.h> 191# include <sys/time.h>
156# include <sys/wait.h> 192# include <sys/wait.h>
157# include <unistd.h> 193# include <unistd.h>
158#else 194#else
195# include <io.h>
159# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
160# include <windows.h> 197# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
163# endif 200# endif
201# undef EV_AVOID_STDIO
164#endif 202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
165 211
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
167 213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
251# endif
252#endif
253
168#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
169# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
170#endif 260#endif
171 261
172#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 264#endif
175 265
176#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
177# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
271# endif
178#endif 272#endif
179 273
180#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 276#endif
183 277
184#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
185# ifdef _WIN32 279# ifdef _WIN32
186# define EV_USE_POLL 0 280# define EV_USE_POLL 0
187# else 281# else
188# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 283# endif
190#endif 284#endif
191 285
192#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 289# else
196# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
197# endif 291# endif
198#endif 292#endif
199 293
… …
205# define EV_USE_PORT 0 299# define EV_USE_PORT 0
206#endif 300#endif
207 301
208#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 305# else
212# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
213# endif 307# endif
214#endif 308#endif
215 309
216#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 312#endif
223 313
224#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 316#endif
231 317
232#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 321# else
236# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
237# endif 323# endif
238#endif 324#endif
239 325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
241 373
242#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
245#endif 377#endif
… …
253# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
255#endif 387#endif
256 388
257#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
259# include <sys/select.h> 392# include <sys/select.h>
260# endif 393# endif
261#endif 394#endif
262 395
263#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
264# include <sys/inotify.h> 398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
265#endif 404#endif
266 405
267#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h> 407# include <winsock.h>
269#endif 408#endif
270 409
271#if EV_USE_EVENTFD 410#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h> 412# include <stdint.h>
274# ifdef __cplusplus 413# ifndef EFD_NONBLOCK
275extern "C" { 414# define EFD_NONBLOCK O_NONBLOCK
276# endif 415# endif
277int eventfd (unsigned int initval, int flags); 416# ifndef EFD_CLOEXEC
278# ifdef __cplusplus 417# ifdef O_CLOEXEC
279} 418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
280# endif 422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
281#endif 446#endif
282 447
283/**/ 448/**/
284 449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
285/* 456/*
286 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */ 459 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
294 462
295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298 465
299#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)
300# 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)
301# 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
302#else 493#else
303# define expect(expr,value) (expr) 494 #define ecb_inline static
304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif 495#endif
308#endif
309 496
497#if ECB_GCC_VERSION(3,1)
498 #define ecb_attribute(attrlist) __attribute__(attrlist)
499 #define ecb_is_constant(expr) __builtin_constant_p (expr)
500 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
501 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
502#else
503 #define ecb_attribute(attrlist)
504 #define ecb_is_constant(expr) 0
505 #define ecb_expect(expr,value) (expr)
506 #define ecb_prefetch(addr,rw,locality)
507#endif
508
509#define ecb_noinline ecb_attribute ((__noinline__))
510#define ecb_noreturn ecb_attribute ((__noreturn__))
511#define ecb_unused ecb_attribute ((__unused__))
512#define ecb_const ecb_attribute ((__const__))
513#define ecb_pure ecb_attribute ((__pure__))
514
515#if ECB_GCC_VERSION(4,3)
516 #define ecb_artificial ecb_attribute ((__artificial__))
517 #define ecb_hot ecb_attribute ((__hot__))
518 #define ecb_cold ecb_attribute ((__cold__))
519#else
520 #define ecb_artificial
521 #define ecb_hot
522 #define ecb_cold
523#endif
524
525/* put around conditional expressions if you are very sure that the */
526/* expression is mostly true or mostly false. note that these return */
527/* booleans, not the expression. */
310#define expect_false(expr) expect ((expr) != 0, 0) 528#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
311#define expect_true(expr) expect ((expr) != 0, 1) 529#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
530/* ecb.h end */
531
532#define expect_false(cond) ecb_expect_false (cond)
533#define expect_true(cond) ecb_expect_true (cond)
534#define noinline ecb_noinline
535
312#define inline_size static inline 536#define inline_size ecb_inline
313 537
314#if EV_MINIMAL 538#if EV_FEATURE_CODE
539# define inline_speed ecb_inline
540#else
315# define inline_speed static noinline 541# define inline_speed static noinline
542#endif
543
544#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
545
546#if EV_MINPRI == EV_MAXPRI
547# define ABSPRI(w) (((W)w), 0)
316#else 548#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 549# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
550#endif
322 551
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 552#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */ 553#define EMPTY2(a,b) /* used to suppress some warnings */
325 554
326typedef ev_watcher *W; 555typedef ev_watcher *W;
… …
328typedef ev_watcher_time *WT; 557typedef ev_watcher_time *WT;
329 558
330#define ev_active(w) ((W)(w))->active 559#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at 560#define ev_at(w) ((WT)(w))->at
332 561
562#if EV_USE_REALTIME
563/* sig_atomic_t is used to avoid per-thread variables or locking but still */
564/* giving it a reasonably high chance of working on typical architectures */
565static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
566#endif
567
333#if EV_USE_MONOTONIC 568#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 569static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
570#endif
571
572#ifndef EV_FD_TO_WIN32_HANDLE
573# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
574#endif
575#ifndef EV_WIN32_HANDLE_TO_FD
576# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
577#endif
578#ifndef EV_WIN32_CLOSE_FD
579# define EV_WIN32_CLOSE_FD(fd) close (fd)
337#endif 580#endif
338 581
339#ifdef _WIN32 582#ifdef _WIN32
340# include "ev_win32.c" 583# include "ev_win32.c"
341#endif 584#endif
342 585
343/*****************************************************************************/ 586/*****************************************************************************/
344 587
588/* define a suitable floor function (only used by periodics atm) */
589
590#if EV_USE_FLOOR
591# include <math.h>
592# define ev_floor(v) floor (v)
593#else
594
595#include <float.h>
596
597/* a floor() replacement function, should be independent of ev_tstamp type */
598static ev_tstamp noinline
599ev_floor (ev_tstamp v)
600{
601 /* the choice of shift factor is not terribly important */
602#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
603 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
604#else
605 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
606#endif
607
608 /* argument too large for an unsigned long? */
609 if (expect_false (v >= shift))
610 {
611 ev_tstamp f;
612
613 if (v == v - 1.)
614 return v; /* very large number */
615
616 f = shift * ev_floor (v * (1. / shift));
617 return f + ev_floor (v - f);
618 }
619
620 /* special treatment for negative args? */
621 if (expect_false (v < 0.))
622 {
623 ev_tstamp f = -ev_floor (-v);
624
625 return f - (f == v ? 0 : 1);
626 }
627
628 /* fits into an unsigned long */
629 return (unsigned long)v;
630}
631
632#endif
633
634/*****************************************************************************/
635
636#ifdef __linux
637# include <sys/utsname.h>
638#endif
639
640static unsigned int noinline ecb_cold
641ev_linux_version (void)
642{
643#ifdef __linux
644 unsigned int v = 0;
645 struct utsname buf;
646 int i;
647 char *p = buf.release;
648
649 if (uname (&buf))
650 return 0;
651
652 for (i = 3+1; --i; )
653 {
654 unsigned int c = 0;
655
656 for (;;)
657 {
658 if (*p >= '0' && *p <= '9')
659 c = c * 10 + *p++ - '0';
660 else
661 {
662 p += *p == '.';
663 break;
664 }
665 }
666
667 v = (v << 8) | c;
668 }
669
670 return v;
671#else
672 return 0;
673#endif
674}
675
676/*****************************************************************************/
677
678#if EV_AVOID_STDIO
679static void noinline ecb_cold
680ev_printerr (const char *msg)
681{
682 write (STDERR_FILENO, msg, strlen (msg));
683}
684#endif
685
345static void (*syserr_cb)(const char *msg); 686static void (*syserr_cb)(const char *msg);
346 687
347void 688void ecb_cold
348ev_set_syserr_cb (void (*cb)(const char *msg)) 689ev_set_syserr_cb (void (*cb)(const char *msg))
349{ 690{
350 syserr_cb = cb; 691 syserr_cb = cb;
351} 692}
352 693
353static void noinline 694static void noinline ecb_cold
354syserr (const char *msg) 695ev_syserr (const char *msg)
355{ 696{
356 if (!msg) 697 if (!msg)
357 msg = "(libev) system error"; 698 msg = "(libev) system error";
358 699
359 if (syserr_cb) 700 if (syserr_cb)
360 syserr_cb (msg); 701 syserr_cb (msg);
361 else 702 else
362 { 703 {
704#if EV_AVOID_STDIO
705 ev_printerr (msg);
706 ev_printerr (": ");
707 ev_printerr (strerror (errno));
708 ev_printerr ("\n");
709#else
363 perror (msg); 710 perror (msg);
711#endif
364 abort (); 712 abort ();
365 } 713 }
366} 714}
367 715
368static void * 716static void *
369ev_realloc_emul (void *ptr, long size) 717ev_realloc_emul (void *ptr, long size)
370{ 718{
719#if __GLIBC__
720 return realloc (ptr, size);
721#else
371 /* some systems, notably openbsd and darwin, fail to properly 722 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and 723 * implement realloc (x, 0) (as required by both ansi c-89 and
373 * the single unix specification, so work around them here. 724 * the single unix specification, so work around them here.
374 */ 725 */
375 726
376 if (size) 727 if (size)
377 return realloc (ptr, size); 728 return realloc (ptr, size);
378 729
379 free (ptr); 730 free (ptr);
380 return 0; 731 return 0;
732#endif
381} 733}
382 734
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 735static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384 736
385void 737void ecb_cold
386ev_set_allocator (void *(*cb)(void *ptr, long size)) 738ev_set_allocator (void *(*cb)(void *ptr, long size))
387{ 739{
388 alloc = cb; 740 alloc = cb;
389} 741}
390 742
… …
393{ 745{
394 ptr = alloc (ptr, size); 746 ptr = alloc (ptr, size);
395 747
396 if (!ptr && size) 748 if (!ptr && size)
397 { 749 {
750#if EV_AVOID_STDIO
751 ev_printerr ("(libev) memory allocation failed, aborting.\n");
752#else
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 753 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
754#endif
399 abort (); 755 abort ();
400 } 756 }
401 757
402 return ptr; 758 return ptr;
403} 759}
… …
405#define ev_malloc(size) ev_realloc (0, (size)) 761#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0) 762#define ev_free(ptr) ev_realloc ((ptr), 0)
407 763
408/*****************************************************************************/ 764/*****************************************************************************/
409 765
766/* set in reify when reification needed */
767#define EV_ANFD_REIFY 1
768
769/* file descriptor info structure */
410typedef struct 770typedef struct
411{ 771{
412 WL head; 772 WL head;
413 unsigned char events; 773 unsigned char events; /* the events watched for */
774 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
775 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
414 unsigned char reify; 776 unsigned char unused;
777#if EV_USE_EPOLL
778 unsigned int egen; /* generation counter to counter epoll bugs */
779#endif
415#if EV_SELECT_IS_WINSOCKET 780#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
416 SOCKET handle; 781 SOCKET handle;
417#endif 782#endif
783#if EV_USE_IOCP
784 OVERLAPPED or, ow;
785#endif
418} ANFD; 786} ANFD;
419 787
788/* stores the pending event set for a given watcher */
420typedef struct 789typedef struct
421{ 790{
422 W w; 791 W w;
423 int events; 792 int events; /* the pending event set for the given watcher */
424} ANPENDING; 793} ANPENDING;
425 794
426#if EV_USE_INOTIFY 795#if EV_USE_INOTIFY
796/* hash table entry per inotify-id */
427typedef struct 797typedef struct
428{ 798{
429 WL head; 799 WL head;
430} ANFS; 800} ANFS;
801#endif
802
803/* Heap Entry */
804#if EV_HEAP_CACHE_AT
805 /* a heap element */
806 typedef struct {
807 ev_tstamp at;
808 WT w;
809 } ANHE;
810
811 #define ANHE_w(he) (he).w /* access watcher, read-write */
812 #define ANHE_at(he) (he).at /* access cached at, read-only */
813 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
814#else
815 /* a heap element */
816 typedef WT ANHE;
817
818 #define ANHE_w(he) (he)
819 #define ANHE_at(he) (he)->at
820 #define ANHE_at_cache(he)
431#endif 821#endif
432 822
433#if EV_MULTIPLICITY 823#if EV_MULTIPLICITY
434 824
435 struct ev_loop 825 struct ev_loop
… …
454 844
455 static int ev_default_loop_ptr; 845 static int ev_default_loop_ptr;
456 846
457#endif 847#endif
458 848
849#if EV_FEATURE_API
850# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
851# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
852# define EV_INVOKE_PENDING invoke_cb (EV_A)
853#else
854# define EV_RELEASE_CB (void)0
855# define EV_ACQUIRE_CB (void)0
856# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
857#endif
858
859#define EVBREAK_RECURSE 0x80
860
459/*****************************************************************************/ 861/*****************************************************************************/
460 862
863#ifndef EV_HAVE_EV_TIME
461ev_tstamp 864ev_tstamp
462ev_time (void) 865ev_time (void)
463{ 866{
464#if EV_USE_REALTIME 867#if EV_USE_REALTIME
868 if (expect_true (have_realtime))
869 {
465 struct timespec ts; 870 struct timespec ts;
466 clock_gettime (CLOCK_REALTIME, &ts); 871 clock_gettime (CLOCK_REALTIME, &ts);
467 return ts.tv_sec + ts.tv_nsec * 1e-9; 872 return ts.tv_sec + ts.tv_nsec * 1e-9;
468#else 873 }
874#endif
875
469 struct timeval tv; 876 struct timeval tv;
470 gettimeofday (&tv, 0); 877 gettimeofday (&tv, 0);
471 return tv.tv_sec + tv.tv_usec * 1e-6; 878 return tv.tv_sec + tv.tv_usec * 1e-6;
472#endif
473} 879}
880#endif
474 881
475ev_tstamp inline_size 882inline_size ev_tstamp
476get_clock (void) 883get_clock (void)
477{ 884{
478#if EV_USE_MONOTONIC 885#if EV_USE_MONOTONIC
479 if (expect_true (have_monotonic)) 886 if (expect_true (have_monotonic))
480 { 887 {
… …
501 if (delay > 0.) 908 if (delay > 0.)
502 { 909 {
503#if EV_USE_NANOSLEEP 910#if EV_USE_NANOSLEEP
504 struct timespec ts; 911 struct timespec ts;
505 912
506 ts.tv_sec = (time_t)delay; 913 EV_TS_SET (ts, delay);
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0); 914 nanosleep (&ts, 0);
510#elif defined(_WIN32) 915#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3)); 916 Sleep ((unsigned long)(delay * 1e3));
512#else 917#else
513 struct timeval tv; 918 struct timeval tv;
514 919
515 tv.tv_sec = (time_t)delay; 920 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 921 /* something not guaranteed by newer posix versions, but guaranteed */
517 922 /* by older ones */
923 EV_TV_SET (tv, delay);
518 select (0, 0, 0, 0, &tv); 924 select (0, 0, 0, 0, &tv);
519#endif 925#endif
520 } 926 }
521} 927}
522 928
523/*****************************************************************************/ 929/*****************************************************************************/
524 930
525int inline_size 931#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
932
933/* find a suitable new size for the given array, */
934/* hopefully by rounding to a nice-to-malloc size */
935inline_size int
526array_nextsize (int elem, int cur, int cnt) 936array_nextsize (int elem, int cur, int cnt)
527{ 937{
528 int ncur = cur + 1; 938 int ncur = cur + 1;
529 939
530 do 940 do
531 ncur <<= 1; 941 ncur <<= 1;
532 while (cnt > ncur); 942 while (cnt > ncur);
533 943
534 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 944 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
535 if (elem * ncur > 4096) 945 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
536 { 946 {
537 ncur *= elem; 947 ncur *= elem;
538 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 948 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
539 ncur = ncur - sizeof (void *) * 4; 949 ncur = ncur - sizeof (void *) * 4;
540 ncur /= elem; 950 ncur /= elem;
541 } 951 }
542 952
543 return ncur; 953 return ncur;
544} 954}
545 955
546static noinline void * 956static void * noinline ecb_cold
547array_realloc (int elem, void *base, int *cur, int cnt) 957array_realloc (int elem, void *base, int *cur, int cnt)
548{ 958{
549 *cur = array_nextsize (elem, *cur, cnt); 959 *cur = array_nextsize (elem, *cur, cnt);
550 return ev_realloc (base, elem * *cur); 960 return ev_realloc (base, elem * *cur);
551} 961}
962
963#define array_init_zero(base,count) \
964 memset ((void *)(base), 0, sizeof (*(base)) * (count))
552 965
553#define array_needsize(type,base,cur,cnt,init) \ 966#define array_needsize(type,base,cur,cnt,init) \
554 if (expect_false ((cnt) > (cur))) \ 967 if (expect_false ((cnt) > (cur))) \
555 { \ 968 { \
556 int ocur_ = (cur); \ 969 int ecb_unused ocur_ = (cur); \
557 (base) = (type *)array_realloc \ 970 (base) = (type *)array_realloc \
558 (sizeof (type), (base), &(cur), (cnt)); \ 971 (sizeof (type), (base), &(cur), (cnt)); \
559 init ((base) + (ocur_), (cur) - ocur_); \ 972 init ((base) + (ocur_), (cur) - ocur_); \
560 } 973 }
561 974
… …
568 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 981 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
569 } 982 }
570#endif 983#endif
571 984
572#define array_free(stem, idx) \ 985#define array_free(stem, idx) \
573 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 986 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
574 987
575/*****************************************************************************/ 988/*****************************************************************************/
989
990/* dummy callback for pending events */
991static void noinline
992pendingcb (EV_P_ ev_prepare *w, int revents)
993{
994}
576 995
577void noinline 996void noinline
578ev_feed_event (EV_P_ void *w, int revents) 997ev_feed_event (EV_P_ void *w, int revents)
579{ 998{
580 W w_ = (W)w; 999 W w_ = (W)w;
… …
589 pendings [pri][w_->pending - 1].w = w_; 1008 pendings [pri][w_->pending - 1].w = w_;
590 pendings [pri][w_->pending - 1].events = revents; 1009 pendings [pri][w_->pending - 1].events = revents;
591 } 1010 }
592} 1011}
593 1012
594void inline_speed 1013inline_speed void
1014feed_reverse (EV_P_ W w)
1015{
1016 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1017 rfeeds [rfeedcnt++] = w;
1018}
1019
1020inline_size void
1021feed_reverse_done (EV_P_ int revents)
1022{
1023 do
1024 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1025 while (rfeedcnt);
1026}
1027
1028inline_speed void
595queue_events (EV_P_ W *events, int eventcnt, int type) 1029queue_events (EV_P_ W *events, int eventcnt, int type)
596{ 1030{
597 int i; 1031 int i;
598 1032
599 for (i = 0; i < eventcnt; ++i) 1033 for (i = 0; i < eventcnt; ++i)
600 ev_feed_event (EV_A_ events [i], type); 1034 ev_feed_event (EV_A_ events [i], type);
601} 1035}
602 1036
603/*****************************************************************************/ 1037/*****************************************************************************/
604 1038
605void inline_size 1039inline_speed void
606anfds_init (ANFD *base, int count)
607{
608 while (count--)
609 {
610 base->head = 0;
611 base->events = EV_NONE;
612 base->reify = 0;
613
614 ++base;
615 }
616}
617
618void inline_speed
619fd_event (EV_P_ int fd, int revents) 1040fd_event_nocheck (EV_P_ int fd, int revents)
620{ 1041{
621 ANFD *anfd = anfds + fd; 1042 ANFD *anfd = anfds + fd;
622 ev_io *w; 1043 ev_io *w;
623 1044
624 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1045 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
628 if (ev) 1049 if (ev)
629 ev_feed_event (EV_A_ (W)w, ev); 1050 ev_feed_event (EV_A_ (W)w, ev);
630 } 1051 }
631} 1052}
632 1053
1054/* do not submit kernel events for fds that have reify set */
1055/* because that means they changed while we were polling for new events */
1056inline_speed void
1057fd_event (EV_P_ int fd, int revents)
1058{
1059 ANFD *anfd = anfds + fd;
1060
1061 if (expect_true (!anfd->reify))
1062 fd_event_nocheck (EV_A_ fd, revents);
1063}
1064
633void 1065void
634ev_feed_fd_event (EV_P_ int fd, int revents) 1066ev_feed_fd_event (EV_P_ int fd, int revents)
635{ 1067{
636 if (fd >= 0 && fd < anfdmax) 1068 if (fd >= 0 && fd < anfdmax)
637 fd_event (EV_A_ fd, revents); 1069 fd_event_nocheck (EV_A_ fd, revents);
638} 1070}
639 1071
640void inline_size 1072/* make sure the external fd watch events are in-sync */
1073/* with the kernel/libev internal state */
1074inline_size void
641fd_reify (EV_P) 1075fd_reify (EV_P)
642{ 1076{
643 int i; 1077 int i;
1078
1079#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1080 for (i = 0; i < fdchangecnt; ++i)
1081 {
1082 int fd = fdchanges [i];
1083 ANFD *anfd = anfds + fd;
1084
1085 if (anfd->reify & EV__IOFDSET && anfd->head)
1086 {
1087 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1088
1089 if (handle != anfd->handle)
1090 {
1091 unsigned long arg;
1092
1093 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1094
1095 /* handle changed, but fd didn't - we need to do it in two steps */
1096 backend_modify (EV_A_ fd, anfd->events, 0);
1097 anfd->events = 0;
1098 anfd->handle = handle;
1099 }
1100 }
1101 }
1102#endif
644 1103
645 for (i = 0; i < fdchangecnt; ++i) 1104 for (i = 0; i < fdchangecnt; ++i)
646 { 1105 {
647 int fd = fdchanges [i]; 1106 int fd = fdchanges [i];
648 ANFD *anfd = anfds + fd; 1107 ANFD *anfd = anfds + fd;
649 ev_io *w; 1108 ev_io *w;
650 1109
651 unsigned char events = 0; 1110 unsigned char o_events = anfd->events;
1111 unsigned char o_reify = anfd->reify;
652 1112
653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1113 anfd->reify = 0;
654 events |= (unsigned char)w->events;
655 1114
656#if EV_SELECT_IS_WINSOCKET 1115 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
657 if (events)
658 { 1116 {
659 unsigned long argp; 1117 anfd->events = 0;
660 #ifdef EV_FD_TO_WIN32_HANDLE 1118
661 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1119 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
662 #else 1120 anfd->events |= (unsigned char)w->events;
663 anfd->handle = _get_osfhandle (fd); 1121
664 #endif 1122 if (o_events != anfd->events)
665 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1123 o_reify = EV__IOFDSET; /* actually |= */
666 } 1124 }
667#endif
668 1125
669 { 1126 if (o_reify & EV__IOFDSET)
670 unsigned char o_events = anfd->events;
671 unsigned char o_reify = anfd->reify;
672
673 anfd->reify = 0;
674 anfd->events = events;
675
676 if (o_events != events || o_reify & EV_IOFDSET)
677 backend_modify (EV_A_ fd, o_events, events); 1127 backend_modify (EV_A_ fd, o_events, anfd->events);
678 }
679 } 1128 }
680 1129
681 fdchangecnt = 0; 1130 fdchangecnt = 0;
682} 1131}
683 1132
684void inline_size 1133/* something about the given fd changed */
1134inline_size void
685fd_change (EV_P_ int fd, int flags) 1135fd_change (EV_P_ int fd, int flags)
686{ 1136{
687 unsigned char reify = anfds [fd].reify; 1137 unsigned char reify = anfds [fd].reify;
688 anfds [fd].reify |= flags; 1138 anfds [fd].reify |= flags;
689 1139
… …
693 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1143 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
694 fdchanges [fdchangecnt - 1] = fd; 1144 fdchanges [fdchangecnt - 1] = fd;
695 } 1145 }
696} 1146}
697 1147
698void inline_speed 1148/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1149inline_speed void ecb_cold
699fd_kill (EV_P_ int fd) 1150fd_kill (EV_P_ int fd)
700{ 1151{
701 ev_io *w; 1152 ev_io *w;
702 1153
703 while ((w = (ev_io *)anfds [fd].head)) 1154 while ((w = (ev_io *)anfds [fd].head))
… …
705 ev_io_stop (EV_A_ w); 1156 ev_io_stop (EV_A_ w);
706 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1157 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
707 } 1158 }
708} 1159}
709 1160
710int inline_size 1161/* check whether the given fd is actually valid, for error recovery */
1162inline_size int ecb_cold
711fd_valid (int fd) 1163fd_valid (int fd)
712{ 1164{
713#ifdef _WIN32 1165#ifdef _WIN32
714 return _get_osfhandle (fd) != -1; 1166 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
715#else 1167#else
716 return fcntl (fd, F_GETFD) != -1; 1168 return fcntl (fd, F_GETFD) != -1;
717#endif 1169#endif
718} 1170}
719 1171
720/* called on EBADF to verify fds */ 1172/* called on EBADF to verify fds */
721static void noinline 1173static void noinline ecb_cold
722fd_ebadf (EV_P) 1174fd_ebadf (EV_P)
723{ 1175{
724 int fd; 1176 int fd;
725 1177
726 for (fd = 0; fd < anfdmax; ++fd) 1178 for (fd = 0; fd < anfdmax; ++fd)
727 if (anfds [fd].events) 1179 if (anfds [fd].events)
728 if (!fd_valid (fd) == -1 && errno == EBADF) 1180 if (!fd_valid (fd) && errno == EBADF)
729 fd_kill (EV_A_ fd); 1181 fd_kill (EV_A_ fd);
730} 1182}
731 1183
732/* called on ENOMEM in select/poll to kill some fds and retry */ 1184/* called on ENOMEM in select/poll to kill some fds and retry */
733static void noinline 1185static void noinline ecb_cold
734fd_enomem (EV_P) 1186fd_enomem (EV_P)
735{ 1187{
736 int fd; 1188 int fd;
737 1189
738 for (fd = anfdmax; fd--; ) 1190 for (fd = anfdmax; fd--; )
739 if (anfds [fd].events) 1191 if (anfds [fd].events)
740 { 1192 {
741 fd_kill (EV_A_ fd); 1193 fd_kill (EV_A_ fd);
742 return; 1194 break;
743 } 1195 }
744} 1196}
745 1197
746/* usually called after fork if backend needs to re-arm all fds from scratch */ 1198/* usually called after fork if backend needs to re-arm all fds from scratch */
747static void noinline 1199static void noinline
… …
751 1203
752 for (fd = 0; fd < anfdmax; ++fd) 1204 for (fd = 0; fd < anfdmax; ++fd)
753 if (anfds [fd].events) 1205 if (anfds [fd].events)
754 { 1206 {
755 anfds [fd].events = 0; 1207 anfds [fd].events = 0;
1208 anfds [fd].emask = 0;
756 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1209 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
757 } 1210 }
758} 1211}
759 1212
760/*****************************************************************************/ 1213/* used to prepare libev internal fd's */
761 1214/* this is not fork-safe */
762/* towards the root */ 1215inline_speed void
763void inline_speed
764upheap (WT *heap, int k)
765{
766 WT w = heap [k];
767
768 for (;;)
769 {
770 int p = k >> 1;
771
772 /* maybe we could use a dummy element at heap [0]? */
773 if (!p || heap [p]->at <= w->at)
774 break;
775
776 heap [k] = heap [p];
777 ev_active (heap [k]) = k;
778 k = p;
779 }
780
781 heap [k] = w;
782 ev_active (heap [k]) = k;
783}
784
785/* away from the root */
786void inline_speed
787downheap (WT *heap, int N, int k)
788{
789 WT w = heap [k];
790
791 for (;;)
792 {
793 int c = k << 1;
794
795 if (c > N)
796 break;
797
798 c += c < N && heap [c]->at > heap [c + 1]->at
799 ? 1 : 0;
800
801 if (w->at <= heap [c]->at)
802 break;
803
804 heap [k] = heap [c];
805 ev_active (heap [k]) = k;
806
807 k = c;
808 }
809
810 heap [k] = w;
811 ev_active (heap [k]) = k;
812}
813
814void inline_size
815adjustheap (WT *heap, int N, int k)
816{
817 upheap (heap, k);
818 downheap (heap, N, k);
819}
820
821/*****************************************************************************/
822
823typedef struct
824{
825 WL head;
826 EV_ATOMIC_T gotsig;
827} ANSIG;
828
829static ANSIG *signals;
830static int signalmax;
831
832static EV_ATOMIC_T gotsig;
833
834void inline_size
835signals_init (ANSIG *base, int count)
836{
837 while (count--)
838 {
839 base->head = 0;
840 base->gotsig = 0;
841
842 ++base;
843 }
844}
845
846/*****************************************************************************/
847
848void inline_speed
849fd_intern (int fd) 1216fd_intern (int fd)
850{ 1217{
851#ifdef _WIN32 1218#ifdef _WIN32
852 int arg = 1; 1219 unsigned long arg = 1;
853 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1220 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
854#else 1221#else
855 fcntl (fd, F_SETFD, FD_CLOEXEC); 1222 fcntl (fd, F_SETFD, FD_CLOEXEC);
856 fcntl (fd, F_SETFL, O_NONBLOCK); 1223 fcntl (fd, F_SETFL, O_NONBLOCK);
857#endif 1224#endif
858} 1225}
859 1226
1227/*****************************************************************************/
1228
1229/*
1230 * the heap functions want a real array index. array index 0 is guaranteed to not
1231 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1232 * the branching factor of the d-tree.
1233 */
1234
1235/*
1236 * at the moment we allow libev the luxury of two heaps,
1237 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1238 * which is more cache-efficient.
1239 * the difference is about 5% with 50000+ watchers.
1240 */
1241#if EV_USE_4HEAP
1242
1243#define DHEAP 4
1244#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1245#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1246#define UPHEAP_DONE(p,k) ((p) == (k))
1247
1248/* away from the root */
1249inline_speed void
1250downheap (ANHE *heap, int N, int k)
1251{
1252 ANHE he = heap [k];
1253 ANHE *E = heap + N + HEAP0;
1254
1255 for (;;)
1256 {
1257 ev_tstamp minat;
1258 ANHE *minpos;
1259 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1260
1261 /* find minimum child */
1262 if (expect_true (pos + DHEAP - 1 < E))
1263 {
1264 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1265 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1266 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1267 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1268 }
1269 else if (pos < E)
1270 {
1271 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1272 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1273 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1274 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1275 }
1276 else
1277 break;
1278
1279 if (ANHE_at (he) <= minat)
1280 break;
1281
1282 heap [k] = *minpos;
1283 ev_active (ANHE_w (*minpos)) = k;
1284
1285 k = minpos - heap;
1286 }
1287
1288 heap [k] = he;
1289 ev_active (ANHE_w (he)) = k;
1290}
1291
1292#else /* 4HEAP */
1293
1294#define HEAP0 1
1295#define HPARENT(k) ((k) >> 1)
1296#define UPHEAP_DONE(p,k) (!(p))
1297
1298/* away from the root */
1299inline_speed void
1300downheap (ANHE *heap, int N, int k)
1301{
1302 ANHE he = heap [k];
1303
1304 for (;;)
1305 {
1306 int c = k << 1;
1307
1308 if (c >= N + HEAP0)
1309 break;
1310
1311 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1312 ? 1 : 0;
1313
1314 if (ANHE_at (he) <= ANHE_at (heap [c]))
1315 break;
1316
1317 heap [k] = heap [c];
1318 ev_active (ANHE_w (heap [k])) = k;
1319
1320 k = c;
1321 }
1322
1323 heap [k] = he;
1324 ev_active (ANHE_w (he)) = k;
1325}
1326#endif
1327
1328/* towards the root */
1329inline_speed void
1330upheap (ANHE *heap, int k)
1331{
1332 ANHE he = heap [k];
1333
1334 for (;;)
1335 {
1336 int p = HPARENT (k);
1337
1338 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1339 break;
1340
1341 heap [k] = heap [p];
1342 ev_active (ANHE_w (heap [k])) = k;
1343 k = p;
1344 }
1345
1346 heap [k] = he;
1347 ev_active (ANHE_w (he)) = k;
1348}
1349
1350/* move an element suitably so it is in a correct place */
1351inline_size void
1352adjustheap (ANHE *heap, int N, int k)
1353{
1354 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1355 upheap (heap, k);
1356 else
1357 downheap (heap, N, k);
1358}
1359
1360/* rebuild the heap: this function is used only once and executed rarely */
1361inline_size void
1362reheap (ANHE *heap, int N)
1363{
1364 int i;
1365
1366 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1367 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1368 for (i = 0; i < N; ++i)
1369 upheap (heap, i + HEAP0);
1370}
1371
1372/*****************************************************************************/
1373
1374/* associate signal watchers to a signal signal */
1375typedef struct
1376{
1377 EV_ATOMIC_T pending;
1378#if EV_MULTIPLICITY
1379 EV_P;
1380#endif
1381 WL head;
1382} ANSIG;
1383
1384static ANSIG signals [EV_NSIG - 1];
1385
1386/*****************************************************************************/
1387
1388#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1389
860static void noinline 1390static void noinline ecb_cold
861evpipe_init (EV_P) 1391evpipe_init (EV_P)
862{ 1392{
863 if (!ev_is_active (&pipeev)) 1393 if (!ev_is_active (&pipe_w))
864 { 1394 {
865#if EV_USE_EVENTFD 1395# if EV_USE_EVENTFD
1396 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1397 if (evfd < 0 && errno == EINVAL)
866 if ((evfd = eventfd (0, 0)) >= 0) 1398 evfd = eventfd (0, 0);
1399
1400 if (evfd >= 0)
867 { 1401 {
868 evpipe [0] = -1; 1402 evpipe [0] = -1;
869 fd_intern (evfd); 1403 fd_intern (evfd); /* doing it twice doesn't hurt */
870 ev_io_set (&pipeev, evfd, EV_READ); 1404 ev_io_set (&pipe_w, evfd, EV_READ);
871 } 1405 }
872 else 1406 else
873#endif 1407# endif
874 { 1408 {
875 while (pipe (evpipe)) 1409 while (pipe (evpipe))
876 syserr ("(libev) error creating signal/async pipe"); 1410 ev_syserr ("(libev) error creating signal/async pipe");
877 1411
878 fd_intern (evpipe [0]); 1412 fd_intern (evpipe [0]);
879 fd_intern (evpipe [1]); 1413 fd_intern (evpipe [1]);
880 ev_io_set (&pipeev, evpipe [0], EV_READ); 1414 ev_io_set (&pipe_w, evpipe [0], EV_READ);
881 } 1415 }
882 1416
883 ev_io_start (EV_A_ &pipeev); 1417 ev_io_start (EV_A_ &pipe_w);
884 ev_unref (EV_A); /* watcher should not keep loop alive */ 1418 ev_unref (EV_A); /* watcher should not keep loop alive */
885 } 1419 }
886} 1420}
887 1421
888void inline_size 1422inline_speed void
889evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1423evpipe_write (EV_P_ EV_ATOMIC_T *flag)
890{ 1424{
891 if (!*flag) 1425 if (!*flag)
892 { 1426 {
893 int old_errno = errno; /* save errno because write might clobber it */
894
895 *flag = 1; 1427 *flag = 1;
896 1428
1429 pipe_write_skipped = 1;
1430
1431 if (pipe_write_wanted)
1432 {
1433 int old_errno;
1434
1435 pipe_write_skipped = 0;
1436
1437 old_errno = errno; /* save errno because write will clobber it */
1438
1439#if EV_USE_EVENTFD
1440 if (evfd >= 0)
1441 {
1442 uint64_t counter = 1;
1443 write (evfd, &counter, sizeof (uint64_t));
1444 }
1445 else
1446#endif
1447 {
1448 /* win32 people keep sending patches that change this write() to send() */
1449 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1450 /* so when you think this write should be a send instead, please find out */
1451 /* where your send() is from - it's definitely not the microsoft send, and */
1452 /* tell me. thank you. */
1453 write (evpipe [1], &(evpipe [1]), 1);
1454 }
1455
1456 errno = old_errno;
1457 }
1458 }
1459}
1460
1461/* called whenever the libev signal pipe */
1462/* got some events (signal, async) */
1463static void
1464pipecb (EV_P_ ev_io *iow, int revents)
1465{
1466 int i;
1467
1468 if (revents & EV_READ)
1469 {
897#if EV_USE_EVENTFD 1470#if EV_USE_EVENTFD
898 if (evfd >= 0) 1471 if (evfd >= 0)
899 { 1472 {
900 uint64_t counter = 1; 1473 uint64_t counter;
901 write (evfd, &counter, sizeof (uint64_t)); 1474 read (evfd, &counter, sizeof (uint64_t));
902 } 1475 }
903 else 1476 else
904#endif 1477#endif
905 write (evpipe [1], &old_errno, 1); 1478 {
906
907 errno = old_errno;
908 }
909}
910
911static void
912pipecb (EV_P_ ev_io *iow, int revents)
913{
914#if EV_USE_EVENTFD
915 if (evfd >= 0)
916 {
917 uint64_t counter = 1;
918 read (evfd, &counter, sizeof (uint64_t));
919 }
920 else
921#endif
922 {
923 char dummy; 1479 char dummy;
1480 /* see discussion in evpipe_write when you think this read should be recv in win32 */
924 read (evpipe [0], &dummy, 1); 1481 read (evpipe [0], &dummy, 1);
1482 }
1483 }
1484
1485 pipe_write_skipped = 0;
1486
1487#if EV_SIGNAL_ENABLE
1488 if (sig_pending)
925 } 1489 {
1490 sig_pending = 0;
926 1491
927 if (gotsig && ev_is_default_loop (EV_A)) 1492 for (i = EV_NSIG - 1; i--; )
928 { 1493 if (expect_false (signals [i].pending))
929 int signum;
930 gotsig = 0;
931
932 for (signum = signalmax; signum--; )
933 if (signals [signum].gotsig)
934 ev_feed_signal_event (EV_A_ signum + 1); 1494 ev_feed_signal_event (EV_A_ i + 1);
935 } 1495 }
1496#endif
936 1497
937#if EV_ASYNC_ENABLE 1498#if EV_ASYNC_ENABLE
938 if (gotasync) 1499 if (async_pending)
939 { 1500 {
940 int i; 1501 async_pending = 0;
941 gotasync = 0;
942 1502
943 for (i = asynccnt; i--; ) 1503 for (i = asynccnt; i--; )
944 if (asyncs [i]->sent) 1504 if (asyncs [i]->sent)
945 { 1505 {
946 asyncs [i]->sent = 0; 1506 asyncs [i]->sent = 0;
… …
950#endif 1510#endif
951} 1511}
952 1512
953/*****************************************************************************/ 1513/*****************************************************************************/
954 1514
1515void
1516ev_feed_signal (int signum)
1517{
1518#if EV_MULTIPLICITY
1519 EV_P = signals [signum - 1].loop;
1520
1521 if (!EV_A)
1522 return;
1523#endif
1524
1525 if (!ev_active (&pipe_w))
1526 return;
1527
1528 signals [signum - 1].pending = 1;
1529 evpipe_write (EV_A_ &sig_pending);
1530}
1531
955static void 1532static void
956ev_sighandler (int signum) 1533ev_sighandler (int signum)
957{ 1534{
958#if EV_MULTIPLICITY
959 struct ev_loop *loop = &default_loop_struct;
960#endif
961
962#if _WIN32 1535#ifdef _WIN32
963 signal (signum, ev_sighandler); 1536 signal (signum, ev_sighandler);
964#endif 1537#endif
965 1538
966 signals [signum - 1].gotsig = 1; 1539 ev_feed_signal (signum);
967 evpipe_write (EV_A_ &gotsig);
968} 1540}
969 1541
970void noinline 1542void noinline
971ev_feed_signal_event (EV_P_ int signum) 1543ev_feed_signal_event (EV_P_ int signum)
972{ 1544{
973 WL w; 1545 WL w;
974 1546
1547 if (expect_false (signum <= 0 || signum > EV_NSIG))
1548 return;
1549
1550 --signum;
1551
975#if EV_MULTIPLICITY 1552#if EV_MULTIPLICITY
976 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1553 /* it is permissible to try to feed a signal to the wrong loop */
977#endif 1554 /* or, likely more useful, feeding a signal nobody is waiting for */
978 1555
979 --signum; 1556 if (expect_false (signals [signum].loop != EV_A))
980
981 if (signum < 0 || signum >= signalmax)
982 return; 1557 return;
1558#endif
983 1559
984 signals [signum].gotsig = 0; 1560 signals [signum].pending = 0;
985 1561
986 for (w = signals [signum].head; w; w = w->next) 1562 for (w = signals [signum].head; w; w = w->next)
987 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1563 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
988} 1564}
989 1565
1566#if EV_USE_SIGNALFD
1567static void
1568sigfdcb (EV_P_ ev_io *iow, int revents)
1569{
1570 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1571
1572 for (;;)
1573 {
1574 ssize_t res = read (sigfd, si, sizeof (si));
1575
1576 /* not ISO-C, as res might be -1, but works with SuS */
1577 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1578 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1579
1580 if (res < (ssize_t)sizeof (si))
1581 break;
1582 }
1583}
1584#endif
1585
1586#endif
1587
990/*****************************************************************************/ 1588/*****************************************************************************/
991 1589
1590#if EV_CHILD_ENABLE
992static WL childs [EV_PID_HASHSIZE]; 1591static WL childs [EV_PID_HASHSIZE];
993
994#ifndef _WIN32
995 1592
996static ev_signal childev; 1593static ev_signal childev;
997 1594
998#ifndef WIFCONTINUED 1595#ifndef WIFCONTINUED
999# define WIFCONTINUED(status) 0 1596# define WIFCONTINUED(status) 0
1000#endif 1597#endif
1001 1598
1002void inline_speed 1599/* handle a single child status event */
1600inline_speed void
1003child_reap (EV_P_ int chain, int pid, int status) 1601child_reap (EV_P_ int chain, int pid, int status)
1004{ 1602{
1005 ev_child *w; 1603 ev_child *w;
1006 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1604 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1007 1605
1008 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1606 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1009 { 1607 {
1010 if ((w->pid == pid || !w->pid) 1608 if ((w->pid == pid || !w->pid)
1011 && (!traced || (w->flags & 1))) 1609 && (!traced || (w->flags & 1)))
1012 { 1610 {
1013 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1611 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1020 1618
1021#ifndef WCONTINUED 1619#ifndef WCONTINUED
1022# define WCONTINUED 0 1620# define WCONTINUED 0
1023#endif 1621#endif
1024 1622
1623/* called on sigchld etc., calls waitpid */
1025static void 1624static void
1026childcb (EV_P_ ev_signal *sw, int revents) 1625childcb (EV_P_ ev_signal *sw, int revents)
1027{ 1626{
1028 int pid, status; 1627 int pid, status;
1029 1628
… …
1037 /* make sure we are called again until all children have been reaped */ 1636 /* make sure we are called again until all children have been reaped */
1038 /* we need to do it this way so that the callback gets called before we continue */ 1637 /* we need to do it this way so that the callback gets called before we continue */
1039 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1638 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1040 1639
1041 child_reap (EV_A_ pid, pid, status); 1640 child_reap (EV_A_ pid, pid, status);
1042 if (EV_PID_HASHSIZE > 1) 1641 if ((EV_PID_HASHSIZE) > 1)
1043 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1642 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1044} 1643}
1045 1644
1046#endif 1645#endif
1047 1646
1048/*****************************************************************************/ 1647/*****************************************************************************/
1049 1648
1649#if EV_USE_IOCP
1650# include "ev_iocp.c"
1651#endif
1050#if EV_USE_PORT 1652#if EV_USE_PORT
1051# include "ev_port.c" 1653# include "ev_port.c"
1052#endif 1654#endif
1053#if EV_USE_KQUEUE 1655#if EV_USE_KQUEUE
1054# include "ev_kqueue.c" 1656# include "ev_kqueue.c"
… …
1061#endif 1663#endif
1062#if EV_USE_SELECT 1664#if EV_USE_SELECT
1063# include "ev_select.c" 1665# include "ev_select.c"
1064#endif 1666#endif
1065 1667
1066int 1668int ecb_cold
1067ev_version_major (void) 1669ev_version_major (void)
1068{ 1670{
1069 return EV_VERSION_MAJOR; 1671 return EV_VERSION_MAJOR;
1070} 1672}
1071 1673
1072int 1674int ecb_cold
1073ev_version_minor (void) 1675ev_version_minor (void)
1074{ 1676{
1075 return EV_VERSION_MINOR; 1677 return EV_VERSION_MINOR;
1076} 1678}
1077 1679
1078/* return true if we are running with elevated privileges and should ignore env variables */ 1680/* return true if we are running with elevated privileges and should ignore env variables */
1079int inline_size 1681int inline_size ecb_cold
1080enable_secure (void) 1682enable_secure (void)
1081{ 1683{
1082#ifdef _WIN32 1684#ifdef _WIN32
1083 return 0; 1685 return 0;
1084#else 1686#else
1085 return getuid () != geteuid () 1687 return getuid () != geteuid ()
1086 || getgid () != getegid (); 1688 || getgid () != getegid ();
1087#endif 1689#endif
1088} 1690}
1089 1691
1090unsigned int 1692unsigned int ecb_cold
1091ev_supported_backends (void) 1693ev_supported_backends (void)
1092{ 1694{
1093 unsigned int flags = 0; 1695 unsigned int flags = 0;
1094 1696
1095 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1697 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1099 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1701 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1100 1702
1101 return flags; 1703 return flags;
1102} 1704}
1103 1705
1104unsigned int 1706unsigned int ecb_cold
1105ev_recommended_backends (void) 1707ev_recommended_backends (void)
1106{ 1708{
1107 unsigned int flags = ev_supported_backends (); 1709 unsigned int flags = ev_supported_backends ();
1108 1710
1109#ifndef __NetBSD__ 1711#ifndef __NetBSD__
1110 /* kqueue is borked on everything but netbsd apparently */ 1712 /* kqueue is borked on everything but netbsd apparently */
1111 /* it usually doesn't work correctly on anything but sockets and pipes */ 1713 /* it usually doesn't work correctly on anything but sockets and pipes */
1112 flags &= ~EVBACKEND_KQUEUE; 1714 flags &= ~EVBACKEND_KQUEUE;
1113#endif 1715#endif
1114#ifdef __APPLE__ 1716#ifdef __APPLE__
1115 // flags &= ~EVBACKEND_KQUEUE; for documentation 1717 /* only select works correctly on that "unix-certified" platform */
1116 flags &= ~EVBACKEND_POLL; 1718 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1719 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1720#endif
1721#ifdef __FreeBSD__
1722 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1117#endif 1723#endif
1118 1724
1119 return flags; 1725 return flags;
1120} 1726}
1121 1727
1122unsigned int 1728unsigned int ecb_cold
1123ev_embeddable_backends (void) 1729ev_embeddable_backends (void)
1124{ 1730{
1125 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1731 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1126 1732
1127 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1733 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1128 /* please fix it and tell me how to detect the fix */ 1734 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1129 flags &= ~EVBACKEND_EPOLL; 1735 flags &= ~EVBACKEND_EPOLL;
1130 1736
1131 return flags; 1737 return flags;
1132} 1738}
1133 1739
1134unsigned int 1740unsigned int
1135ev_backend (EV_P) 1741ev_backend (EV_P)
1136{ 1742{
1137 return backend; 1743 return backend;
1138} 1744}
1139 1745
1746#if EV_FEATURE_API
1140unsigned int 1747unsigned int
1141ev_loop_count (EV_P) 1748ev_iteration (EV_P)
1142{ 1749{
1143 return loop_count; 1750 return loop_count;
1751}
1752
1753unsigned int
1754ev_depth (EV_P)
1755{
1756 return loop_depth;
1144} 1757}
1145 1758
1146void 1759void
1147ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1760ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1148{ 1761{
… …
1153ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1766ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1154{ 1767{
1155 timeout_blocktime = interval; 1768 timeout_blocktime = interval;
1156} 1769}
1157 1770
1771void
1772ev_set_userdata (EV_P_ void *data)
1773{
1774 userdata = data;
1775}
1776
1777void *
1778ev_userdata (EV_P)
1779{
1780 return userdata;
1781}
1782
1783void
1784ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1785{
1786 invoke_cb = invoke_pending_cb;
1787}
1788
1789void
1790ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1791{
1792 release_cb = release;
1793 acquire_cb = acquire;
1794}
1795#endif
1796
1797/* initialise a loop structure, must be zero-initialised */
1158static void noinline 1798static void noinline ecb_cold
1159loop_init (EV_P_ unsigned int flags) 1799loop_init (EV_P_ unsigned int flags)
1160{ 1800{
1161 if (!backend) 1801 if (!backend)
1162 { 1802 {
1803 origflags = flags;
1804
1805#if EV_USE_REALTIME
1806 if (!have_realtime)
1807 {
1808 struct timespec ts;
1809
1810 if (!clock_gettime (CLOCK_REALTIME, &ts))
1811 have_realtime = 1;
1812 }
1813#endif
1814
1163#if EV_USE_MONOTONIC 1815#if EV_USE_MONOTONIC
1816 if (!have_monotonic)
1164 { 1817 {
1165 struct timespec ts; 1818 struct timespec ts;
1819
1166 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1820 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1167 have_monotonic = 1; 1821 have_monotonic = 1;
1168 } 1822 }
1169#endif
1170
1171 ev_rt_now = ev_time ();
1172 mn_now = get_clock ();
1173 now_floor = mn_now;
1174 rtmn_diff = ev_rt_now - mn_now;
1175
1176 io_blocktime = 0.;
1177 timeout_blocktime = 0.;
1178 backend = 0;
1179 backend_fd = -1;
1180 gotasync = 0;
1181#if EV_USE_INOTIFY
1182 fs_fd = -2;
1183#endif 1823#endif
1184 1824
1185 /* pid check not overridable via env */ 1825 /* pid check not overridable via env */
1186#ifndef _WIN32 1826#ifndef _WIN32
1187 if (flags & EVFLAG_FORKCHECK) 1827 if (flags & EVFLAG_FORKCHECK)
… …
1191 if (!(flags & EVFLAG_NOENV) 1831 if (!(flags & EVFLAG_NOENV)
1192 && !enable_secure () 1832 && !enable_secure ()
1193 && getenv ("LIBEV_FLAGS")) 1833 && getenv ("LIBEV_FLAGS"))
1194 flags = atoi (getenv ("LIBEV_FLAGS")); 1834 flags = atoi (getenv ("LIBEV_FLAGS"));
1195 1835
1196 if (!(flags & 0x0000ffffU)) 1836 ev_rt_now = ev_time ();
1837 mn_now = get_clock ();
1838 now_floor = mn_now;
1839 rtmn_diff = ev_rt_now - mn_now;
1840#if EV_FEATURE_API
1841 invoke_cb = ev_invoke_pending;
1842#endif
1843
1844 io_blocktime = 0.;
1845 timeout_blocktime = 0.;
1846 backend = 0;
1847 backend_fd = -1;
1848 sig_pending = 0;
1849#if EV_ASYNC_ENABLE
1850 async_pending = 0;
1851#endif
1852 pipe_write_skipped = 0;
1853 pipe_write_wanted = 0;
1854#if EV_USE_INOTIFY
1855 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1856#endif
1857#if EV_USE_SIGNALFD
1858 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1859#endif
1860
1861 if (!(flags & EVBACKEND_MASK))
1197 flags |= ev_recommended_backends (); 1862 flags |= ev_recommended_backends ();
1198 1863
1864#if EV_USE_IOCP
1865 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1866#endif
1199#if EV_USE_PORT 1867#if EV_USE_PORT
1200 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1868 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1201#endif 1869#endif
1202#if EV_USE_KQUEUE 1870#if EV_USE_KQUEUE
1203 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1871 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1210#endif 1878#endif
1211#if EV_USE_SELECT 1879#if EV_USE_SELECT
1212 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1880 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1213#endif 1881#endif
1214 1882
1883 ev_prepare_init (&pending_w, pendingcb);
1884
1885#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1215 ev_init (&pipeev, pipecb); 1886 ev_init (&pipe_w, pipecb);
1216 ev_set_priority (&pipeev, EV_MAXPRI); 1887 ev_set_priority (&pipe_w, EV_MAXPRI);
1888#endif
1217 } 1889 }
1218} 1890}
1219 1891
1220static void noinline 1892/* free up a loop structure */
1893void ecb_cold
1221loop_destroy (EV_P) 1894ev_loop_destroy (EV_P)
1222{ 1895{
1223 int i; 1896 int i;
1224 1897
1898#if EV_MULTIPLICITY
1899 /* mimic free (0) */
1900 if (!EV_A)
1901 return;
1902#endif
1903
1904#if EV_CLEANUP_ENABLE
1905 /* queue cleanup watchers (and execute them) */
1906 if (expect_false (cleanupcnt))
1907 {
1908 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1909 EV_INVOKE_PENDING;
1910 }
1911#endif
1912
1913#if EV_CHILD_ENABLE
1914 if (ev_is_active (&childev))
1915 {
1916 ev_ref (EV_A); /* child watcher */
1917 ev_signal_stop (EV_A_ &childev);
1918 }
1919#endif
1920
1225 if (ev_is_active (&pipeev)) 1921 if (ev_is_active (&pipe_w))
1226 { 1922 {
1227 ev_ref (EV_A); /* signal watcher */ 1923 /*ev_ref (EV_A);*/
1228 ev_io_stop (EV_A_ &pipeev); 1924 /*ev_io_stop (EV_A_ &pipe_w);*/
1229 1925
1230#if EV_USE_EVENTFD 1926#if EV_USE_EVENTFD
1231 if (evfd >= 0) 1927 if (evfd >= 0)
1232 close (evfd); 1928 close (evfd);
1233#endif 1929#endif
1234 1930
1235 if (evpipe [0] >= 0) 1931 if (evpipe [0] >= 0)
1236 { 1932 {
1237 close (evpipe [0]); 1933 EV_WIN32_CLOSE_FD (evpipe [0]);
1238 close (evpipe [1]); 1934 EV_WIN32_CLOSE_FD (evpipe [1]);
1239 } 1935 }
1240 } 1936 }
1937
1938#if EV_USE_SIGNALFD
1939 if (ev_is_active (&sigfd_w))
1940 close (sigfd);
1941#endif
1241 1942
1242#if EV_USE_INOTIFY 1943#if EV_USE_INOTIFY
1243 if (fs_fd >= 0) 1944 if (fs_fd >= 0)
1244 close (fs_fd); 1945 close (fs_fd);
1245#endif 1946#endif
1246 1947
1247 if (backend_fd >= 0) 1948 if (backend_fd >= 0)
1248 close (backend_fd); 1949 close (backend_fd);
1249 1950
1951#if EV_USE_IOCP
1952 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1953#endif
1250#if EV_USE_PORT 1954#if EV_USE_PORT
1251 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1955 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1252#endif 1956#endif
1253#if EV_USE_KQUEUE 1957#if EV_USE_KQUEUE
1254 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1958 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1269#if EV_IDLE_ENABLE 1973#if EV_IDLE_ENABLE
1270 array_free (idle, [i]); 1974 array_free (idle, [i]);
1271#endif 1975#endif
1272 } 1976 }
1273 1977
1274 ev_free (anfds); anfdmax = 0; 1978 ev_free (anfds); anfds = 0; anfdmax = 0;
1275 1979
1276 /* have to use the microsoft-never-gets-it-right macro */ 1980 /* have to use the microsoft-never-gets-it-right macro */
1981 array_free (rfeed, EMPTY);
1277 array_free (fdchange, EMPTY); 1982 array_free (fdchange, EMPTY);
1278 array_free (timer, EMPTY); 1983 array_free (timer, EMPTY);
1279#if EV_PERIODIC_ENABLE 1984#if EV_PERIODIC_ENABLE
1280 array_free (periodic, EMPTY); 1985 array_free (periodic, EMPTY);
1281#endif 1986#endif
1282#if EV_FORK_ENABLE 1987#if EV_FORK_ENABLE
1283 array_free (fork, EMPTY); 1988 array_free (fork, EMPTY);
1284#endif 1989#endif
1990#if EV_CLEANUP_ENABLE
1991 array_free (cleanup, EMPTY);
1992#endif
1285 array_free (prepare, EMPTY); 1993 array_free (prepare, EMPTY);
1286 array_free (check, EMPTY); 1994 array_free (check, EMPTY);
1287#if EV_ASYNC_ENABLE 1995#if EV_ASYNC_ENABLE
1288 array_free (async, EMPTY); 1996 array_free (async, EMPTY);
1289#endif 1997#endif
1290 1998
1291 backend = 0; 1999 backend = 0;
2000
2001#if EV_MULTIPLICITY
2002 if (ev_is_default_loop (EV_A))
2003#endif
2004 ev_default_loop_ptr = 0;
2005#if EV_MULTIPLICITY
2006 else
2007 ev_free (EV_A);
2008#endif
1292} 2009}
1293 2010
1294#if EV_USE_INOTIFY 2011#if EV_USE_INOTIFY
1295void inline_size infy_fork (EV_P); 2012inline_size void infy_fork (EV_P);
1296#endif 2013#endif
1297 2014
1298void inline_size 2015inline_size void
1299loop_fork (EV_P) 2016loop_fork (EV_P)
1300{ 2017{
1301#if EV_USE_PORT 2018#if EV_USE_PORT
1302 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2019 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1303#endif 2020#endif
… …
1309#endif 2026#endif
1310#if EV_USE_INOTIFY 2027#if EV_USE_INOTIFY
1311 infy_fork (EV_A); 2028 infy_fork (EV_A);
1312#endif 2029#endif
1313 2030
1314 if (ev_is_active (&pipeev)) 2031 if (ev_is_active (&pipe_w))
1315 { 2032 {
1316 /* this "locks" the handlers against writing to the pipe */ 2033 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1317 /* while we modify the fd vars */
1318 gotsig = 1;
1319#if EV_ASYNC_ENABLE
1320 gotasync = 1;
1321#endif
1322 2034
1323 ev_ref (EV_A); 2035 ev_ref (EV_A);
1324 ev_io_stop (EV_A_ &pipeev); 2036 ev_io_stop (EV_A_ &pipe_w);
1325 2037
1326#if EV_USE_EVENTFD 2038#if EV_USE_EVENTFD
1327 if (evfd >= 0) 2039 if (evfd >= 0)
1328 close (evfd); 2040 close (evfd);
1329#endif 2041#endif
1330 2042
1331 if (evpipe [0] >= 0) 2043 if (evpipe [0] >= 0)
1332 { 2044 {
1333 close (evpipe [0]); 2045 EV_WIN32_CLOSE_FD (evpipe [0]);
1334 close (evpipe [1]); 2046 EV_WIN32_CLOSE_FD (evpipe [1]);
1335 } 2047 }
1336 2048
2049#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1337 evpipe_init (EV_A); 2050 evpipe_init (EV_A);
1338 /* now iterate over everything, in case we missed something */ 2051 /* now iterate over everything, in case we missed something */
1339 pipecb (EV_A_ &pipeev, EV_READ); 2052 pipecb (EV_A_ &pipe_w, EV_READ);
2053#endif
1340 } 2054 }
1341 2055
1342 postfork = 0; 2056 postfork = 0;
1343} 2057}
1344 2058
1345#if EV_MULTIPLICITY 2059#if EV_MULTIPLICITY
2060
1346struct ev_loop * 2061struct ev_loop * ecb_cold
1347ev_loop_new (unsigned int flags) 2062ev_loop_new (unsigned int flags)
1348{ 2063{
1349 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2064 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1350 2065
1351 memset (loop, 0, sizeof (struct ev_loop)); 2066 memset (EV_A, 0, sizeof (struct ev_loop));
1352
1353 loop_init (EV_A_ flags); 2067 loop_init (EV_A_ flags);
1354 2068
1355 if (ev_backend (EV_A)) 2069 if (ev_backend (EV_A))
1356 return loop; 2070 return EV_A;
1357 2071
2072 ev_free (EV_A);
1358 return 0; 2073 return 0;
1359} 2074}
1360 2075
1361void 2076#endif /* multiplicity */
1362ev_loop_destroy (EV_P)
1363{
1364 loop_destroy (EV_A);
1365 ev_free (loop);
1366}
1367 2077
1368void 2078#if EV_VERIFY
1369ev_loop_fork (EV_P) 2079static void noinline ecb_cold
2080verify_watcher (EV_P_ W w)
1370{ 2081{
1371 postfork = 1; /* must be in line with ev_default_fork */ 2082 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1372}
1373 2083
2084 if (w->pending)
2085 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2086}
2087
2088static void noinline ecb_cold
2089verify_heap (EV_P_ ANHE *heap, int N)
2090{
2091 int i;
2092
2093 for (i = HEAP0; i < N + HEAP0; ++i)
2094 {
2095 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2096 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2097 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2098
2099 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2100 }
2101}
2102
2103static void noinline ecb_cold
2104array_verify (EV_P_ W *ws, int cnt)
2105{
2106 while (cnt--)
2107 {
2108 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2109 verify_watcher (EV_A_ ws [cnt]);
2110 }
2111}
2112#endif
2113
2114#if EV_FEATURE_API
2115void ecb_cold
2116ev_verify (EV_P)
2117{
2118#if EV_VERIFY
2119 int i;
2120 WL w;
2121
2122 assert (activecnt >= -1);
2123
2124 assert (fdchangemax >= fdchangecnt);
2125 for (i = 0; i < fdchangecnt; ++i)
2126 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2127
2128 assert (anfdmax >= 0);
2129 for (i = 0; i < anfdmax; ++i)
2130 for (w = anfds [i].head; w; w = w->next)
2131 {
2132 verify_watcher (EV_A_ (W)w);
2133 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2134 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2135 }
2136
2137 assert (timermax >= timercnt);
2138 verify_heap (EV_A_ timers, timercnt);
2139
2140#if EV_PERIODIC_ENABLE
2141 assert (periodicmax >= periodiccnt);
2142 verify_heap (EV_A_ periodics, periodiccnt);
2143#endif
2144
2145 for (i = NUMPRI; i--; )
2146 {
2147 assert (pendingmax [i] >= pendingcnt [i]);
2148#if EV_IDLE_ENABLE
2149 assert (idleall >= 0);
2150 assert (idlemax [i] >= idlecnt [i]);
2151 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2152#endif
2153 }
2154
2155#if EV_FORK_ENABLE
2156 assert (forkmax >= forkcnt);
2157 array_verify (EV_A_ (W *)forks, forkcnt);
2158#endif
2159
2160#if EV_CLEANUP_ENABLE
2161 assert (cleanupmax >= cleanupcnt);
2162 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2163#endif
2164
2165#if EV_ASYNC_ENABLE
2166 assert (asyncmax >= asynccnt);
2167 array_verify (EV_A_ (W *)asyncs, asynccnt);
2168#endif
2169
2170#if EV_PREPARE_ENABLE
2171 assert (preparemax >= preparecnt);
2172 array_verify (EV_A_ (W *)prepares, preparecnt);
2173#endif
2174
2175#if EV_CHECK_ENABLE
2176 assert (checkmax >= checkcnt);
2177 array_verify (EV_A_ (W *)checks, checkcnt);
2178#endif
2179
2180# if 0
2181#if EV_CHILD_ENABLE
2182 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2183 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2184#endif
2185# endif
2186#endif
2187}
1374#endif 2188#endif
1375 2189
1376#if EV_MULTIPLICITY 2190#if EV_MULTIPLICITY
1377struct ev_loop * 2191struct ev_loop * ecb_cold
1378ev_default_loop_init (unsigned int flags)
1379#else 2192#else
1380int 2193int
2194#endif
1381ev_default_loop (unsigned int flags) 2195ev_default_loop (unsigned int flags)
1382#endif
1383{ 2196{
1384 if (!ev_default_loop_ptr) 2197 if (!ev_default_loop_ptr)
1385 { 2198 {
1386#if EV_MULTIPLICITY 2199#if EV_MULTIPLICITY
1387 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2200 EV_P = ev_default_loop_ptr = &default_loop_struct;
1388#else 2201#else
1389 ev_default_loop_ptr = 1; 2202 ev_default_loop_ptr = 1;
1390#endif 2203#endif
1391 2204
1392 loop_init (EV_A_ flags); 2205 loop_init (EV_A_ flags);
1393 2206
1394 if (ev_backend (EV_A)) 2207 if (ev_backend (EV_A))
1395 { 2208 {
1396#ifndef _WIN32 2209#if EV_CHILD_ENABLE
1397 ev_signal_init (&childev, childcb, SIGCHLD); 2210 ev_signal_init (&childev, childcb, SIGCHLD);
1398 ev_set_priority (&childev, EV_MAXPRI); 2211 ev_set_priority (&childev, EV_MAXPRI);
1399 ev_signal_start (EV_A_ &childev); 2212 ev_signal_start (EV_A_ &childev);
1400 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2213 ev_unref (EV_A); /* child watcher should not keep loop alive */
1401#endif 2214#endif
… …
1406 2219
1407 return ev_default_loop_ptr; 2220 return ev_default_loop_ptr;
1408} 2221}
1409 2222
1410void 2223void
1411ev_default_destroy (void) 2224ev_loop_fork (EV_P)
1412{ 2225{
1413#if EV_MULTIPLICITY
1414 struct ev_loop *loop = ev_default_loop_ptr;
1415#endif
1416
1417#ifndef _WIN32
1418 ev_ref (EV_A); /* child watcher */
1419 ev_signal_stop (EV_A_ &childev);
1420#endif
1421
1422 loop_destroy (EV_A);
1423}
1424
1425void
1426ev_default_fork (void)
1427{
1428#if EV_MULTIPLICITY
1429 struct ev_loop *loop = ev_default_loop_ptr;
1430#endif
1431
1432 if (backend)
1433 postfork = 1; /* must be in line with ev_loop_fork */ 2226 postfork = 1; /* must be in line with ev_default_fork */
1434} 2227}
1435 2228
1436/*****************************************************************************/ 2229/*****************************************************************************/
1437 2230
1438void 2231void
1439ev_invoke (EV_P_ void *w, int revents) 2232ev_invoke (EV_P_ void *w, int revents)
1440{ 2233{
1441 EV_CB_INVOKE ((W)w, revents); 2234 EV_CB_INVOKE ((W)w, revents);
1442} 2235}
1443 2236
1444void inline_speed 2237unsigned int
1445call_pending (EV_P) 2238ev_pending_count (EV_P)
2239{
2240 int pri;
2241 unsigned int count = 0;
2242
2243 for (pri = NUMPRI; pri--; )
2244 count += pendingcnt [pri];
2245
2246 return count;
2247}
2248
2249void noinline
2250ev_invoke_pending (EV_P)
1446{ 2251{
1447 int pri; 2252 int pri;
1448 2253
1449 for (pri = NUMPRI; pri--; ) 2254 for (pri = NUMPRI; pri--; )
1450 while (pendingcnt [pri]) 2255 while (pendingcnt [pri])
1451 { 2256 {
1452 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2257 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1453 2258
1454 if (expect_true (p->w))
1455 {
1456 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1457
1458 p->w->pending = 0; 2259 p->w->pending = 0;
1459 EV_CB_INVOKE (p->w, p->events); 2260 EV_CB_INVOKE (p->w, p->events);
1460 } 2261 EV_FREQUENT_CHECK;
1461 } 2262 }
1462} 2263}
1463 2264
1464void inline_size
1465timers_reify (EV_P)
1466{
1467 while (timercnt && ev_at (timers [1]) <= mn_now)
1468 {
1469 ev_timer *w = (ev_timer *)timers [1];
1470
1471 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1472
1473 /* first reschedule or stop timer */
1474 if (w->repeat)
1475 {
1476 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1477
1478 ev_at (w) += w->repeat;
1479 if (ev_at (w) < mn_now)
1480 ev_at (w) = mn_now;
1481
1482 downheap (timers, timercnt, 1);
1483 }
1484 else
1485 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1486
1487 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1488 }
1489}
1490
1491#if EV_PERIODIC_ENABLE
1492void inline_size
1493periodics_reify (EV_P)
1494{
1495 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1496 {
1497 ev_periodic *w = (ev_periodic *)periodics [1];
1498
1499 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1500
1501 /* first reschedule or stop timer */
1502 if (w->reschedule_cb)
1503 {
1504 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1505 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1506 downheap (periodics, periodiccnt, 1);
1507 }
1508 else if (w->interval)
1509 {
1510 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1512 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1513 downheap (periodics, periodiccnt, 1);
1514 }
1515 else
1516 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1517
1518 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1519 }
1520}
1521
1522static void noinline
1523periodics_reschedule (EV_P)
1524{
1525 int i;
1526
1527 /* adjust periodics after time jump */
1528 for (i = 0; i < periodiccnt; ++i)
1529 {
1530 ev_periodic *w = (ev_periodic *)periodics [i];
1531
1532 if (w->reschedule_cb)
1533 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1534 else if (w->interval)
1535 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1536 }
1537
1538 /* now rebuild the heap */
1539 for (i = periodiccnt >> 1; i--; )
1540 downheap (periodics, periodiccnt, i);
1541}
1542#endif
1543
1544#if EV_IDLE_ENABLE 2265#if EV_IDLE_ENABLE
1545void inline_size 2266/* make idle watchers pending. this handles the "call-idle */
2267/* only when higher priorities are idle" logic */
2268inline_size void
1546idle_reify (EV_P) 2269idle_reify (EV_P)
1547{ 2270{
1548 if (expect_false (idleall)) 2271 if (expect_false (idleall))
1549 { 2272 {
1550 int pri; 2273 int pri;
… …
1562 } 2285 }
1563 } 2286 }
1564} 2287}
1565#endif 2288#endif
1566 2289
1567void inline_speed 2290/* make timers pending */
2291inline_size void
2292timers_reify (EV_P)
2293{
2294 EV_FREQUENT_CHECK;
2295
2296 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2297 {
2298 do
2299 {
2300 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2301
2302 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2303
2304 /* first reschedule or stop timer */
2305 if (w->repeat)
2306 {
2307 ev_at (w) += w->repeat;
2308 if (ev_at (w) < mn_now)
2309 ev_at (w) = mn_now;
2310
2311 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2312
2313 ANHE_at_cache (timers [HEAP0]);
2314 downheap (timers, timercnt, HEAP0);
2315 }
2316 else
2317 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2318
2319 EV_FREQUENT_CHECK;
2320 feed_reverse (EV_A_ (W)w);
2321 }
2322 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2323
2324 feed_reverse_done (EV_A_ EV_TIMER);
2325 }
2326}
2327
2328#if EV_PERIODIC_ENABLE
2329
2330static void noinline
2331periodic_recalc (EV_P_ ev_periodic *w)
2332{
2333 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2334 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2335
2336 /* the above almost always errs on the low side */
2337 while (at <= ev_rt_now)
2338 {
2339 ev_tstamp nat = at + w->interval;
2340
2341 /* when resolution fails us, we use ev_rt_now */
2342 if (expect_false (nat == at))
2343 {
2344 at = ev_rt_now;
2345 break;
2346 }
2347
2348 at = nat;
2349 }
2350
2351 ev_at (w) = at;
2352}
2353
2354/* make periodics pending */
2355inline_size void
2356periodics_reify (EV_P)
2357{
2358 EV_FREQUENT_CHECK;
2359
2360 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2361 {
2362 int feed_count = 0;
2363
2364 do
2365 {
2366 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2367
2368 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2369
2370 /* first reschedule or stop timer */
2371 if (w->reschedule_cb)
2372 {
2373 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2374
2375 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2376
2377 ANHE_at_cache (periodics [HEAP0]);
2378 downheap (periodics, periodiccnt, HEAP0);
2379 }
2380 else if (w->interval)
2381 {
2382 periodic_recalc (EV_A_ w);
2383 ANHE_at_cache (periodics [HEAP0]);
2384 downheap (periodics, periodiccnt, HEAP0);
2385 }
2386 else
2387 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2388
2389 EV_FREQUENT_CHECK;
2390 feed_reverse (EV_A_ (W)w);
2391 }
2392 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2393
2394 feed_reverse_done (EV_A_ EV_PERIODIC);
2395 }
2396}
2397
2398/* simply recalculate all periodics */
2399/* TODO: maybe ensure that at least one event happens when jumping forward? */
2400static void noinline ecb_cold
2401periodics_reschedule (EV_P)
2402{
2403 int i;
2404
2405 /* adjust periodics after time jump */
2406 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2407 {
2408 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2409
2410 if (w->reschedule_cb)
2411 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2412 else if (w->interval)
2413 periodic_recalc (EV_A_ w);
2414
2415 ANHE_at_cache (periodics [i]);
2416 }
2417
2418 reheap (periodics, periodiccnt);
2419}
2420#endif
2421
2422/* adjust all timers by a given offset */
2423static void noinline ecb_cold
2424timers_reschedule (EV_P_ ev_tstamp adjust)
2425{
2426 int i;
2427
2428 for (i = 0; i < timercnt; ++i)
2429 {
2430 ANHE *he = timers + i + HEAP0;
2431 ANHE_w (*he)->at += adjust;
2432 ANHE_at_cache (*he);
2433 }
2434}
2435
2436/* fetch new monotonic and realtime times from the kernel */
2437/* also detect if there was a timejump, and act accordingly */
2438inline_speed void
1568time_update (EV_P_ ev_tstamp max_block) 2439time_update (EV_P_ ev_tstamp max_block)
1569{ 2440{
1570 int i;
1571
1572#if EV_USE_MONOTONIC 2441#if EV_USE_MONOTONIC
1573 if (expect_true (have_monotonic)) 2442 if (expect_true (have_monotonic))
1574 { 2443 {
2444 int i;
1575 ev_tstamp odiff = rtmn_diff; 2445 ev_tstamp odiff = rtmn_diff;
1576 2446
1577 mn_now = get_clock (); 2447 mn_now = get_clock ();
1578 2448
1579 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2449 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1595 * doesn't hurt either as we only do this on time-jumps or 2465 * doesn't hurt either as we only do this on time-jumps or
1596 * in the unlikely event of having been preempted here. 2466 * in the unlikely event of having been preempted here.
1597 */ 2467 */
1598 for (i = 4; --i; ) 2468 for (i = 4; --i; )
1599 { 2469 {
2470 ev_tstamp diff;
1600 rtmn_diff = ev_rt_now - mn_now; 2471 rtmn_diff = ev_rt_now - mn_now;
1601 2472
1602 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2473 diff = odiff - rtmn_diff;
2474
2475 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1603 return; /* all is well */ 2476 return; /* all is well */
1604 2477
1605 ev_rt_now = ev_time (); 2478 ev_rt_now = ev_time ();
1606 mn_now = get_clock (); 2479 mn_now = get_clock ();
1607 now_floor = mn_now; 2480 now_floor = mn_now;
1608 } 2481 }
1609 2482
2483 /* no timer adjustment, as the monotonic clock doesn't jump */
2484 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1610# if EV_PERIODIC_ENABLE 2485# if EV_PERIODIC_ENABLE
1611 periodics_reschedule (EV_A); 2486 periodics_reschedule (EV_A);
1612# endif 2487# endif
1613 /* no timer adjustment, as the monotonic clock doesn't jump */
1614 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1615 } 2488 }
1616 else 2489 else
1617#endif 2490#endif
1618 { 2491 {
1619 ev_rt_now = ev_time (); 2492 ev_rt_now = ev_time ();
1620 2493
1621 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2494 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1622 { 2495 {
2496 /* adjust timers. this is easy, as the offset is the same for all of them */
2497 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1623#if EV_PERIODIC_ENABLE 2498#if EV_PERIODIC_ENABLE
1624 periodics_reschedule (EV_A); 2499 periodics_reschedule (EV_A);
1625#endif 2500#endif
1626 /* adjust timers. this is easy, as the offset is the same for all of them */
1627 for (i = 1; i <= timercnt; ++i)
1628 ev_at (timers [i]) += ev_rt_now - mn_now;
1629 } 2501 }
1630 2502
1631 mn_now = ev_rt_now; 2503 mn_now = ev_rt_now;
1632 } 2504 }
1633} 2505}
1634 2506
1635void 2507void
1636ev_ref (EV_P)
1637{
1638 ++activecnt;
1639}
1640
1641void
1642ev_unref (EV_P)
1643{
1644 --activecnt;
1645}
1646
1647static int loop_done;
1648
1649void
1650ev_loop (EV_P_ int flags) 2508ev_run (EV_P_ int flags)
1651{ 2509{
2510#if EV_FEATURE_API
2511 ++loop_depth;
2512#endif
2513
2514 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2515
1652 loop_done = EVUNLOOP_CANCEL; 2516 loop_done = EVBREAK_CANCEL;
1653 2517
1654 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2518 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1655 2519
1656 do 2520 do
1657 { 2521 {
2522#if EV_VERIFY >= 2
2523 ev_verify (EV_A);
2524#endif
2525
1658#ifndef _WIN32 2526#ifndef _WIN32
1659 if (expect_false (curpid)) /* penalise the forking check even more */ 2527 if (expect_false (curpid)) /* penalise the forking check even more */
1660 if (expect_false (getpid () != curpid)) 2528 if (expect_false (getpid () != curpid))
1661 { 2529 {
1662 curpid = getpid (); 2530 curpid = getpid ();
… …
1668 /* we might have forked, so queue fork handlers */ 2536 /* we might have forked, so queue fork handlers */
1669 if (expect_false (postfork)) 2537 if (expect_false (postfork))
1670 if (forkcnt) 2538 if (forkcnt)
1671 { 2539 {
1672 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2540 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1673 call_pending (EV_A); 2541 EV_INVOKE_PENDING;
1674 } 2542 }
1675#endif 2543#endif
1676 2544
2545#if EV_PREPARE_ENABLE
1677 /* queue prepare watchers (and execute them) */ 2546 /* queue prepare watchers (and execute them) */
1678 if (expect_false (preparecnt)) 2547 if (expect_false (preparecnt))
1679 { 2548 {
1680 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2549 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1681 call_pending (EV_A); 2550 EV_INVOKE_PENDING;
1682 } 2551 }
2552#endif
1683 2553
1684 if (expect_false (!activecnt)) 2554 if (expect_false (loop_done))
1685 break; 2555 break;
1686 2556
1687 /* we might have forked, so reify kernel state if necessary */ 2557 /* we might have forked, so reify kernel state if necessary */
1688 if (expect_false (postfork)) 2558 if (expect_false (postfork))
1689 loop_fork (EV_A); 2559 loop_fork (EV_A);
… …
1694 /* calculate blocking time */ 2564 /* calculate blocking time */
1695 { 2565 {
1696 ev_tstamp waittime = 0.; 2566 ev_tstamp waittime = 0.;
1697 ev_tstamp sleeptime = 0.; 2567 ev_tstamp sleeptime = 0.;
1698 2568
2569 /* remember old timestamp for io_blocktime calculation */
2570 ev_tstamp prev_mn_now = mn_now;
2571
2572 /* update time to cancel out callback processing overhead */
2573 time_update (EV_A_ 1e100);
2574
2575 /* from now on, we want a pipe-wake-up */
2576 pipe_write_wanted = 1;
2577
1699 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2578 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1700 { 2579 {
1701 /* update time to cancel out callback processing overhead */
1702 time_update (EV_A_ 1e100);
1703
1704 waittime = MAX_BLOCKTIME; 2580 waittime = MAX_BLOCKTIME;
1705 2581
1706 if (timercnt) 2582 if (timercnt)
1707 { 2583 {
1708 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge; 2584 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1709 if (waittime > to) waittime = to; 2585 if (waittime > to) waittime = to;
1710 } 2586 }
1711 2587
1712#if EV_PERIODIC_ENABLE 2588#if EV_PERIODIC_ENABLE
1713 if (periodiccnt) 2589 if (periodiccnt)
1714 { 2590 {
1715 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge; 2591 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1716 if (waittime > to) waittime = to; 2592 if (waittime > to) waittime = to;
1717 } 2593 }
1718#endif 2594#endif
1719 2595
2596 /* don't let timeouts decrease the waittime below timeout_blocktime */
1720 if (expect_false (waittime < timeout_blocktime)) 2597 if (expect_false (waittime < timeout_blocktime))
1721 waittime = timeout_blocktime; 2598 waittime = timeout_blocktime;
1722 2599
1723 sleeptime = waittime - backend_fudge; 2600 /* at this point, we NEED to wait, so we have to ensure */
2601 /* to pass a minimum nonzero value to the backend */
2602 if (expect_false (waittime < backend_mintime))
2603 waittime = backend_mintime;
1724 2604
2605 /* extra check because io_blocktime is commonly 0 */
1725 if (expect_true (sleeptime > io_blocktime)) 2606 if (expect_false (io_blocktime))
1726 sleeptime = io_blocktime;
1727
1728 if (sleeptime)
1729 { 2607 {
2608 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2609
2610 if (sleeptime > waittime - backend_mintime)
2611 sleeptime = waittime - backend_mintime;
2612
2613 if (expect_true (sleeptime > 0.))
2614 {
1730 ev_sleep (sleeptime); 2615 ev_sleep (sleeptime);
1731 waittime -= sleeptime; 2616 waittime -= sleeptime;
2617 }
1732 } 2618 }
1733 } 2619 }
1734 2620
2621#if EV_FEATURE_API
1735 ++loop_count; 2622 ++loop_count;
2623#endif
2624 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1736 backend_poll (EV_A_ waittime); 2625 backend_poll (EV_A_ waittime);
2626 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2627
2628 pipe_write_wanted = 0;
2629
2630 if (pipe_write_skipped)
2631 {
2632 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2633 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2634 }
2635
1737 2636
1738 /* update ev_rt_now, do magic */ 2637 /* update ev_rt_now, do magic */
1739 time_update (EV_A_ waittime + sleeptime); 2638 time_update (EV_A_ waittime + sleeptime);
1740 } 2639 }
1741 2640
… …
1748#if EV_IDLE_ENABLE 2647#if EV_IDLE_ENABLE
1749 /* queue idle watchers unless other events are pending */ 2648 /* queue idle watchers unless other events are pending */
1750 idle_reify (EV_A); 2649 idle_reify (EV_A);
1751#endif 2650#endif
1752 2651
2652#if EV_CHECK_ENABLE
1753 /* queue check watchers, to be executed first */ 2653 /* queue check watchers, to be executed first */
1754 if (expect_false (checkcnt)) 2654 if (expect_false (checkcnt))
1755 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2655 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2656#endif
1756 2657
1757 call_pending (EV_A); 2658 EV_INVOKE_PENDING;
1758 } 2659 }
1759 while (expect_true ( 2660 while (expect_true (
1760 activecnt 2661 activecnt
1761 && !loop_done 2662 && !loop_done
1762 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2663 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1763 )); 2664 ));
1764 2665
1765 if (loop_done == EVUNLOOP_ONE) 2666 if (loop_done == EVBREAK_ONE)
1766 loop_done = EVUNLOOP_CANCEL; 2667 loop_done = EVBREAK_CANCEL;
2668
2669#if EV_FEATURE_API
2670 --loop_depth;
2671#endif
1767} 2672}
1768 2673
1769void 2674void
1770ev_unloop (EV_P_ int how) 2675ev_break (EV_P_ int how)
1771{ 2676{
1772 loop_done = how; 2677 loop_done = how;
1773} 2678}
1774 2679
2680void
2681ev_ref (EV_P)
2682{
2683 ++activecnt;
2684}
2685
2686void
2687ev_unref (EV_P)
2688{
2689 --activecnt;
2690}
2691
2692void
2693ev_now_update (EV_P)
2694{
2695 time_update (EV_A_ 1e100);
2696}
2697
2698void
2699ev_suspend (EV_P)
2700{
2701 ev_now_update (EV_A);
2702}
2703
2704void
2705ev_resume (EV_P)
2706{
2707 ev_tstamp mn_prev = mn_now;
2708
2709 ev_now_update (EV_A);
2710 timers_reschedule (EV_A_ mn_now - mn_prev);
2711#if EV_PERIODIC_ENABLE
2712 /* TODO: really do this? */
2713 periodics_reschedule (EV_A);
2714#endif
2715}
2716
1775/*****************************************************************************/ 2717/*****************************************************************************/
2718/* singly-linked list management, used when the expected list length is short */
1776 2719
1777void inline_size 2720inline_size void
1778wlist_add (WL *head, WL elem) 2721wlist_add (WL *head, WL elem)
1779{ 2722{
1780 elem->next = *head; 2723 elem->next = *head;
1781 *head = elem; 2724 *head = elem;
1782} 2725}
1783 2726
1784void inline_size 2727inline_size void
1785wlist_del (WL *head, WL elem) 2728wlist_del (WL *head, WL elem)
1786{ 2729{
1787 while (*head) 2730 while (*head)
1788 { 2731 {
1789 if (*head == elem) 2732 if (expect_true (*head == elem))
1790 { 2733 {
1791 *head = elem->next; 2734 *head = elem->next;
1792 return; 2735 break;
1793 } 2736 }
1794 2737
1795 head = &(*head)->next; 2738 head = &(*head)->next;
1796 } 2739 }
1797} 2740}
1798 2741
1799void inline_speed 2742/* internal, faster, version of ev_clear_pending */
2743inline_speed void
1800clear_pending (EV_P_ W w) 2744clear_pending (EV_P_ W w)
1801{ 2745{
1802 if (w->pending) 2746 if (w->pending)
1803 { 2747 {
1804 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2748 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1805 w->pending = 0; 2749 w->pending = 0;
1806 } 2750 }
1807} 2751}
1808 2752
1809int 2753int
… …
1813 int pending = w_->pending; 2757 int pending = w_->pending;
1814 2758
1815 if (expect_true (pending)) 2759 if (expect_true (pending))
1816 { 2760 {
1817 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2761 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2762 p->w = (W)&pending_w;
1818 w_->pending = 0; 2763 w_->pending = 0;
1819 p->w = 0;
1820 return p->events; 2764 return p->events;
1821 } 2765 }
1822 else 2766 else
1823 return 0; 2767 return 0;
1824} 2768}
1825 2769
1826void inline_size 2770inline_size void
1827pri_adjust (EV_P_ W w) 2771pri_adjust (EV_P_ W w)
1828{ 2772{
1829 int pri = w->priority; 2773 int pri = ev_priority (w);
1830 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2774 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1831 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2775 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1832 w->priority = pri; 2776 ev_set_priority (w, pri);
1833} 2777}
1834 2778
1835void inline_speed 2779inline_speed void
1836ev_start (EV_P_ W w, int active) 2780ev_start (EV_P_ W w, int active)
1837{ 2781{
1838 pri_adjust (EV_A_ w); 2782 pri_adjust (EV_A_ w);
1839 w->active = active; 2783 w->active = active;
1840 ev_ref (EV_A); 2784 ev_ref (EV_A);
1841} 2785}
1842 2786
1843void inline_size 2787inline_size void
1844ev_stop (EV_P_ W w) 2788ev_stop (EV_P_ W w)
1845{ 2789{
1846 ev_unref (EV_A); 2790 ev_unref (EV_A);
1847 w->active = 0; 2791 w->active = 0;
1848} 2792}
… …
1855 int fd = w->fd; 2799 int fd = w->fd;
1856 2800
1857 if (expect_false (ev_is_active (w))) 2801 if (expect_false (ev_is_active (w)))
1858 return; 2802 return;
1859 2803
1860 assert (("ev_io_start called with negative fd", fd >= 0)); 2804 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2805 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2806
2807 EV_FREQUENT_CHECK;
1861 2808
1862 ev_start (EV_A_ (W)w, 1); 2809 ev_start (EV_A_ (W)w, 1);
1863 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2810 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1864 wlist_add (&anfds[fd].head, (WL)w); 2811 wlist_add (&anfds[fd].head, (WL)w);
1865 2812
1866 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2813 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1867 w->events &= ~EV_IOFDSET; 2814 w->events &= ~EV__IOFDSET;
2815
2816 EV_FREQUENT_CHECK;
1868} 2817}
1869 2818
1870void noinline 2819void noinline
1871ev_io_stop (EV_P_ ev_io *w) 2820ev_io_stop (EV_P_ ev_io *w)
1872{ 2821{
1873 clear_pending (EV_A_ (W)w); 2822 clear_pending (EV_A_ (W)w);
1874 if (expect_false (!ev_is_active (w))) 2823 if (expect_false (!ev_is_active (w)))
1875 return; 2824 return;
1876 2825
1877 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2826 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2827
2828 EV_FREQUENT_CHECK;
1878 2829
1879 wlist_del (&anfds[w->fd].head, (WL)w); 2830 wlist_del (&anfds[w->fd].head, (WL)w);
1880 ev_stop (EV_A_ (W)w); 2831 ev_stop (EV_A_ (W)w);
1881 2832
1882 fd_change (EV_A_ w->fd, 1); 2833 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2834
2835 EV_FREQUENT_CHECK;
1883} 2836}
1884 2837
1885void noinline 2838void noinline
1886ev_timer_start (EV_P_ ev_timer *w) 2839ev_timer_start (EV_P_ ev_timer *w)
1887{ 2840{
1888 if (expect_false (ev_is_active (w))) 2841 if (expect_false (ev_is_active (w)))
1889 return; 2842 return;
1890 2843
1891 ev_at (w) += mn_now; 2844 ev_at (w) += mn_now;
1892 2845
1893 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2846 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1894 2847
2848 EV_FREQUENT_CHECK;
2849
2850 ++timercnt;
1895 ev_start (EV_A_ (W)w, ++timercnt); 2851 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1896 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2); 2852 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1897 timers [timercnt] = (WT)w; 2853 ANHE_w (timers [ev_active (w)]) = (WT)w;
2854 ANHE_at_cache (timers [ev_active (w)]);
1898 upheap (timers, timercnt); 2855 upheap (timers, ev_active (w));
1899 2856
2857 EV_FREQUENT_CHECK;
2858
1900 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/ 2859 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1901} 2860}
1902 2861
1903void noinline 2862void noinline
1904ev_timer_stop (EV_P_ ev_timer *w) 2863ev_timer_stop (EV_P_ ev_timer *w)
1905{ 2864{
1906 clear_pending (EV_A_ (W)w); 2865 clear_pending (EV_A_ (W)w);
1907 if (expect_false (!ev_is_active (w))) 2866 if (expect_false (!ev_is_active (w)))
1908 return; 2867 return;
1909 2868
2869 EV_FREQUENT_CHECK;
2870
1910 { 2871 {
1911 int active = ev_active (w); 2872 int active = ev_active (w);
1912 2873
1913 assert (("internal timer heap corruption", timers [active] == (WT)w)); 2874 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1914 2875
2876 --timercnt;
2877
1915 if (expect_true (active < timercnt)) 2878 if (expect_true (active < timercnt + HEAP0))
1916 { 2879 {
1917 timers [active] = timers [timercnt]; 2880 timers [active] = timers [timercnt + HEAP0];
1918 adjustheap (timers, timercnt, active); 2881 adjustheap (timers, timercnt, active);
1919 } 2882 }
1920
1921 --timercnt;
1922 } 2883 }
1923 2884
1924 ev_at (w) -= mn_now; 2885 ev_at (w) -= mn_now;
1925 2886
1926 ev_stop (EV_A_ (W)w); 2887 ev_stop (EV_A_ (W)w);
2888
2889 EV_FREQUENT_CHECK;
1927} 2890}
1928 2891
1929void noinline 2892void noinline
1930ev_timer_again (EV_P_ ev_timer *w) 2893ev_timer_again (EV_P_ ev_timer *w)
1931{ 2894{
2895 EV_FREQUENT_CHECK;
2896
1932 if (ev_is_active (w)) 2897 if (ev_is_active (w))
1933 { 2898 {
1934 if (w->repeat) 2899 if (w->repeat)
1935 { 2900 {
1936 ev_at (w) = mn_now + w->repeat; 2901 ev_at (w) = mn_now + w->repeat;
2902 ANHE_at_cache (timers [ev_active (w)]);
1937 adjustheap (timers, timercnt, ev_active (w)); 2903 adjustheap (timers, timercnt, ev_active (w));
1938 } 2904 }
1939 else 2905 else
1940 ev_timer_stop (EV_A_ w); 2906 ev_timer_stop (EV_A_ w);
1941 } 2907 }
1942 else if (w->repeat) 2908 else if (w->repeat)
1943 { 2909 {
1944 ev_at (w) = w->repeat; 2910 ev_at (w) = w->repeat;
1945 ev_timer_start (EV_A_ w); 2911 ev_timer_start (EV_A_ w);
1946 } 2912 }
2913
2914 EV_FREQUENT_CHECK;
2915}
2916
2917ev_tstamp
2918ev_timer_remaining (EV_P_ ev_timer *w)
2919{
2920 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1947} 2921}
1948 2922
1949#if EV_PERIODIC_ENABLE 2923#if EV_PERIODIC_ENABLE
1950void noinline 2924void noinline
1951ev_periodic_start (EV_P_ ev_periodic *w) 2925ev_periodic_start (EV_P_ ev_periodic *w)
… …
1955 2929
1956 if (w->reschedule_cb) 2930 if (w->reschedule_cb)
1957 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2931 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1958 else if (w->interval) 2932 else if (w->interval)
1959 { 2933 {
1960 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2934 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1961 /* this formula differs from the one in periodic_reify because we do not always round up */ 2935 periodic_recalc (EV_A_ w);
1962 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1963 } 2936 }
1964 else 2937 else
1965 ev_at (w) = w->offset; 2938 ev_at (w) = w->offset;
1966 2939
2940 EV_FREQUENT_CHECK;
2941
2942 ++periodiccnt;
1967 ev_start (EV_A_ (W)w, ++periodiccnt); 2943 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1968 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2); 2944 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1969 periodics [periodiccnt] = (WT)w; 2945 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1970 upheap (periodics, periodiccnt); 2946 ANHE_at_cache (periodics [ev_active (w)]);
2947 upheap (periodics, ev_active (w));
1971 2948
2949 EV_FREQUENT_CHECK;
2950
1972 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/ 2951 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1973} 2952}
1974 2953
1975void noinline 2954void noinline
1976ev_periodic_stop (EV_P_ ev_periodic *w) 2955ev_periodic_stop (EV_P_ ev_periodic *w)
1977{ 2956{
1978 clear_pending (EV_A_ (W)w); 2957 clear_pending (EV_A_ (W)w);
1979 if (expect_false (!ev_is_active (w))) 2958 if (expect_false (!ev_is_active (w)))
1980 return; 2959 return;
1981 2960
2961 EV_FREQUENT_CHECK;
2962
1982 { 2963 {
1983 int active = ev_active (w); 2964 int active = ev_active (w);
1984 2965
1985 assert (("internal periodic heap corruption", periodics [active] == (WT)w)); 2966 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1986 2967
2968 --periodiccnt;
2969
1987 if (expect_true (active < periodiccnt)) 2970 if (expect_true (active < periodiccnt + HEAP0))
1988 { 2971 {
1989 periodics [active] = periodics [periodiccnt]; 2972 periodics [active] = periodics [periodiccnt + HEAP0];
1990 adjustheap (periodics, periodiccnt, active); 2973 adjustheap (periodics, periodiccnt, active);
1991 } 2974 }
1992
1993 --periodiccnt;
1994 } 2975 }
1995 2976
1996 ev_stop (EV_A_ (W)w); 2977 ev_stop (EV_A_ (W)w);
2978
2979 EV_FREQUENT_CHECK;
1997} 2980}
1998 2981
1999void noinline 2982void noinline
2000ev_periodic_again (EV_P_ ev_periodic *w) 2983ev_periodic_again (EV_P_ ev_periodic *w)
2001{ 2984{
… …
2007 2990
2008#ifndef SA_RESTART 2991#ifndef SA_RESTART
2009# define SA_RESTART 0 2992# define SA_RESTART 0
2010#endif 2993#endif
2011 2994
2995#if EV_SIGNAL_ENABLE
2996
2012void noinline 2997void noinline
2013ev_signal_start (EV_P_ ev_signal *w) 2998ev_signal_start (EV_P_ ev_signal *w)
2014{ 2999{
2015#if EV_MULTIPLICITY
2016 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2017#endif
2018 if (expect_false (ev_is_active (w))) 3000 if (expect_false (ev_is_active (w)))
2019 return; 3001 return;
2020 3002
2021 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3003 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2022 3004
2023 evpipe_init (EV_A); 3005#if EV_MULTIPLICITY
3006 assert (("libev: a signal must not be attached to two different loops",
3007 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2024 3008
3009 signals [w->signum - 1].loop = EV_A;
3010#endif
3011
3012 EV_FREQUENT_CHECK;
3013
3014#if EV_USE_SIGNALFD
3015 if (sigfd == -2)
2025 { 3016 {
2026#ifndef _WIN32 3017 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2027 sigset_t full, prev; 3018 if (sigfd < 0 && errno == EINVAL)
2028 sigfillset (&full); 3019 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2029 sigprocmask (SIG_SETMASK, &full, &prev);
2030#endif
2031 3020
2032 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3021 if (sigfd >= 0)
3022 {
3023 fd_intern (sigfd); /* doing it twice will not hurt */
2033 3024
2034#ifndef _WIN32 3025 sigemptyset (&sigfd_set);
2035 sigprocmask (SIG_SETMASK, &prev, 0); 3026
2036#endif 3027 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3028 ev_set_priority (&sigfd_w, EV_MAXPRI);
3029 ev_io_start (EV_A_ &sigfd_w);
3030 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3031 }
2037 } 3032 }
3033
3034 if (sigfd >= 0)
3035 {
3036 /* TODO: check .head */
3037 sigaddset (&sigfd_set, w->signum);
3038 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3039
3040 signalfd (sigfd, &sigfd_set, 0);
3041 }
3042#endif
2038 3043
2039 ev_start (EV_A_ (W)w, 1); 3044 ev_start (EV_A_ (W)w, 1);
2040 wlist_add (&signals [w->signum - 1].head, (WL)w); 3045 wlist_add (&signals [w->signum - 1].head, (WL)w);
2041 3046
2042 if (!((WL)w)->next) 3047 if (!((WL)w)->next)
3048# if EV_USE_SIGNALFD
3049 if (sigfd < 0) /*TODO*/
3050# endif
2043 { 3051 {
2044#if _WIN32 3052# ifdef _WIN32
3053 evpipe_init (EV_A);
3054
2045 signal (w->signum, ev_sighandler); 3055 signal (w->signum, ev_sighandler);
2046#else 3056# else
2047 struct sigaction sa; 3057 struct sigaction sa;
3058
3059 evpipe_init (EV_A);
3060
2048 sa.sa_handler = ev_sighandler; 3061 sa.sa_handler = ev_sighandler;
2049 sigfillset (&sa.sa_mask); 3062 sigfillset (&sa.sa_mask);
2050 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3063 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2051 sigaction (w->signum, &sa, 0); 3064 sigaction (w->signum, &sa, 0);
3065
3066 if (origflags & EVFLAG_NOSIGMASK)
3067 {
3068 sigemptyset (&sa.sa_mask);
3069 sigaddset (&sa.sa_mask, w->signum);
3070 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3071 }
2052#endif 3072#endif
2053 } 3073 }
3074
3075 EV_FREQUENT_CHECK;
2054} 3076}
2055 3077
2056void noinline 3078void noinline
2057ev_signal_stop (EV_P_ ev_signal *w) 3079ev_signal_stop (EV_P_ ev_signal *w)
2058{ 3080{
2059 clear_pending (EV_A_ (W)w); 3081 clear_pending (EV_A_ (W)w);
2060 if (expect_false (!ev_is_active (w))) 3082 if (expect_false (!ev_is_active (w)))
2061 return; 3083 return;
2062 3084
3085 EV_FREQUENT_CHECK;
3086
2063 wlist_del (&signals [w->signum - 1].head, (WL)w); 3087 wlist_del (&signals [w->signum - 1].head, (WL)w);
2064 ev_stop (EV_A_ (W)w); 3088 ev_stop (EV_A_ (W)w);
2065 3089
2066 if (!signals [w->signum - 1].head) 3090 if (!signals [w->signum - 1].head)
3091 {
3092#if EV_MULTIPLICITY
3093 signals [w->signum - 1].loop = 0; /* unattach from signal */
3094#endif
3095#if EV_USE_SIGNALFD
3096 if (sigfd >= 0)
3097 {
3098 sigset_t ss;
3099
3100 sigemptyset (&ss);
3101 sigaddset (&ss, w->signum);
3102 sigdelset (&sigfd_set, w->signum);
3103
3104 signalfd (sigfd, &sigfd_set, 0);
3105 sigprocmask (SIG_UNBLOCK, &ss, 0);
3106 }
3107 else
3108#endif
2067 signal (w->signum, SIG_DFL); 3109 signal (w->signum, SIG_DFL);
3110 }
3111
3112 EV_FREQUENT_CHECK;
2068} 3113}
3114
3115#endif
3116
3117#if EV_CHILD_ENABLE
2069 3118
2070void 3119void
2071ev_child_start (EV_P_ ev_child *w) 3120ev_child_start (EV_P_ ev_child *w)
2072{ 3121{
2073#if EV_MULTIPLICITY 3122#if EV_MULTIPLICITY
2074 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3123 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2075#endif 3124#endif
2076 if (expect_false (ev_is_active (w))) 3125 if (expect_false (ev_is_active (w)))
2077 return; 3126 return;
2078 3127
3128 EV_FREQUENT_CHECK;
3129
2079 ev_start (EV_A_ (W)w, 1); 3130 ev_start (EV_A_ (W)w, 1);
2080 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3131 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3132
3133 EV_FREQUENT_CHECK;
2081} 3134}
2082 3135
2083void 3136void
2084ev_child_stop (EV_P_ ev_child *w) 3137ev_child_stop (EV_P_ ev_child *w)
2085{ 3138{
2086 clear_pending (EV_A_ (W)w); 3139 clear_pending (EV_A_ (W)w);
2087 if (expect_false (!ev_is_active (w))) 3140 if (expect_false (!ev_is_active (w)))
2088 return; 3141 return;
2089 3142
3143 EV_FREQUENT_CHECK;
3144
2090 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3145 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2091 ev_stop (EV_A_ (W)w); 3146 ev_stop (EV_A_ (W)w);
3147
3148 EV_FREQUENT_CHECK;
2092} 3149}
3150
3151#endif
2093 3152
2094#if EV_STAT_ENABLE 3153#if EV_STAT_ENABLE
2095 3154
2096# ifdef _WIN32 3155# ifdef _WIN32
2097# undef lstat 3156# undef lstat
2098# define lstat(a,b) _stati64 (a,b) 3157# define lstat(a,b) _stati64 (a,b)
2099# endif 3158# endif
2100 3159
2101#define DEF_STAT_INTERVAL 5.0074891 3160#define DEF_STAT_INTERVAL 5.0074891
3161#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2102#define MIN_STAT_INTERVAL 0.1074891 3162#define MIN_STAT_INTERVAL 0.1074891
2103 3163
2104static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3164static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2105 3165
2106#if EV_USE_INOTIFY 3166#if EV_USE_INOTIFY
2107# define EV_INOTIFY_BUFSIZE 8192 3167
3168/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3169# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2108 3170
2109static void noinline 3171static void noinline
2110infy_add (EV_P_ ev_stat *w) 3172infy_add (EV_P_ ev_stat *w)
2111{ 3173{
2112 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); 3174 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);
2113 3175
2114 if (w->wd < 0) 3176 if (w->wd >= 0)
3177 {
3178 struct statfs sfs;
3179
3180 /* now local changes will be tracked by inotify, but remote changes won't */
3181 /* unless the filesystem is known to be local, we therefore still poll */
3182 /* also do poll on <2.6.25, but with normal frequency */
3183
3184 if (!fs_2625)
3185 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3186 else if (!statfs (w->path, &sfs)
3187 && (sfs.f_type == 0x1373 /* devfs */
3188 || sfs.f_type == 0xEF53 /* ext2/3 */
3189 || sfs.f_type == 0x3153464a /* jfs */
3190 || sfs.f_type == 0x52654973 /* reiser3 */
3191 || sfs.f_type == 0x01021994 /* tempfs */
3192 || sfs.f_type == 0x58465342 /* xfs */))
3193 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3194 else
3195 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2115 { 3196 }
2116 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3197 else
3198 {
3199 /* can't use inotify, continue to stat */
3200 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2117 3201
2118 /* monitor some parent directory for speedup hints */ 3202 /* if path is not there, monitor some parent directory for speedup hints */
3203 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3204 /* but an efficiency issue only */
2119 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3205 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2120 { 3206 {
2121 char path [4096]; 3207 char path [4096];
2122 strcpy (path, w->path); 3208 strcpy (path, w->path);
2123 3209
… …
2126 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3212 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2127 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3213 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2128 3214
2129 char *pend = strrchr (path, '/'); 3215 char *pend = strrchr (path, '/');
2130 3216
2131 if (!pend) 3217 if (!pend || pend == path)
2132 break; /* whoops, no '/', complain to your admin */ 3218 break;
2133 3219
2134 *pend = 0; 3220 *pend = 0;
2135 w->wd = inotify_add_watch (fs_fd, path, mask); 3221 w->wd = inotify_add_watch (fs_fd, path, mask);
2136 } 3222 }
2137 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3223 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2138 } 3224 }
2139 } 3225 }
2140 else
2141 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2142 3226
2143 if (w->wd >= 0) 3227 if (w->wd >= 0)
2144 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3228 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3229
3230 /* now re-arm timer, if required */
3231 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3232 ev_timer_again (EV_A_ &w->timer);
3233 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2145} 3234}
2146 3235
2147static void noinline 3236static void noinline
2148infy_del (EV_P_ ev_stat *w) 3237infy_del (EV_P_ ev_stat *w)
2149{ 3238{
… …
2152 3241
2153 if (wd < 0) 3242 if (wd < 0)
2154 return; 3243 return;
2155 3244
2156 w->wd = -2; 3245 w->wd = -2;
2157 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3246 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2158 wlist_del (&fs_hash [slot].head, (WL)w); 3247 wlist_del (&fs_hash [slot].head, (WL)w);
2159 3248
2160 /* remove this watcher, if others are watching it, they will rearm */ 3249 /* remove this watcher, if others are watching it, they will rearm */
2161 inotify_rm_watch (fs_fd, wd); 3250 inotify_rm_watch (fs_fd, wd);
2162} 3251}
2163 3252
2164static void noinline 3253static void noinline
2165infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3254infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2166{ 3255{
2167 if (slot < 0) 3256 if (slot < 0)
2168 /* overflow, need to check for all hahs slots */ 3257 /* overflow, need to check for all hash slots */
2169 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3258 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2170 infy_wd (EV_A_ slot, wd, ev); 3259 infy_wd (EV_A_ slot, wd, ev);
2171 else 3260 else
2172 { 3261 {
2173 WL w_; 3262 WL w_;
2174 3263
2175 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3264 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2176 { 3265 {
2177 ev_stat *w = (ev_stat *)w_; 3266 ev_stat *w = (ev_stat *)w_;
2178 w_ = w_->next; /* lets us remove this watcher and all before it */ 3267 w_ = w_->next; /* lets us remove this watcher and all before it */
2179 3268
2180 if (w->wd == wd || wd == -1) 3269 if (w->wd == wd || wd == -1)
2181 { 3270 {
2182 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3271 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2183 { 3272 {
3273 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2184 w->wd = -1; 3274 w->wd = -1;
2185 infy_add (EV_A_ w); /* re-add, no matter what */ 3275 infy_add (EV_A_ w); /* re-add, no matter what */
2186 } 3276 }
2187 3277
2188 stat_timer_cb (EV_A_ &w->timer, 0); 3278 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2193 3283
2194static void 3284static void
2195infy_cb (EV_P_ ev_io *w, int revents) 3285infy_cb (EV_P_ ev_io *w, int revents)
2196{ 3286{
2197 char buf [EV_INOTIFY_BUFSIZE]; 3287 char buf [EV_INOTIFY_BUFSIZE];
2198 struct inotify_event *ev = (struct inotify_event *)buf;
2199 int ofs; 3288 int ofs;
2200 int len = read (fs_fd, buf, sizeof (buf)); 3289 int len = read (fs_fd, buf, sizeof (buf));
2201 3290
2202 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3291 for (ofs = 0; ofs < len; )
3292 {
3293 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2203 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3294 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3295 ofs += sizeof (struct inotify_event) + ev->len;
3296 }
2204} 3297}
2205 3298
2206void inline_size 3299inline_size void ecb_cold
3300ev_check_2625 (EV_P)
3301{
3302 /* kernels < 2.6.25 are borked
3303 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3304 */
3305 if (ev_linux_version () < 0x020619)
3306 return;
3307
3308 fs_2625 = 1;
3309}
3310
3311inline_size int
3312infy_newfd (void)
3313{
3314#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3315 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3316 if (fd >= 0)
3317 return fd;
3318#endif
3319 return inotify_init ();
3320}
3321
3322inline_size void
2207infy_init (EV_P) 3323infy_init (EV_P)
2208{ 3324{
2209 if (fs_fd != -2) 3325 if (fs_fd != -2)
2210 return; 3326 return;
2211 3327
3328 fs_fd = -1;
3329
3330 ev_check_2625 (EV_A);
3331
2212 fs_fd = inotify_init (); 3332 fs_fd = infy_newfd ();
2213 3333
2214 if (fs_fd >= 0) 3334 if (fs_fd >= 0)
2215 { 3335 {
3336 fd_intern (fs_fd);
2216 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3337 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2217 ev_set_priority (&fs_w, EV_MAXPRI); 3338 ev_set_priority (&fs_w, EV_MAXPRI);
2218 ev_io_start (EV_A_ &fs_w); 3339 ev_io_start (EV_A_ &fs_w);
3340 ev_unref (EV_A);
2219 } 3341 }
2220} 3342}
2221 3343
2222void inline_size 3344inline_size void
2223infy_fork (EV_P) 3345infy_fork (EV_P)
2224{ 3346{
2225 int slot; 3347 int slot;
2226 3348
2227 if (fs_fd < 0) 3349 if (fs_fd < 0)
2228 return; 3350 return;
2229 3351
3352 ev_ref (EV_A);
3353 ev_io_stop (EV_A_ &fs_w);
2230 close (fs_fd); 3354 close (fs_fd);
2231 fs_fd = inotify_init (); 3355 fs_fd = infy_newfd ();
2232 3356
3357 if (fs_fd >= 0)
3358 {
3359 fd_intern (fs_fd);
3360 ev_io_set (&fs_w, fs_fd, EV_READ);
3361 ev_io_start (EV_A_ &fs_w);
3362 ev_unref (EV_A);
3363 }
3364
2233 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3365 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2234 { 3366 {
2235 WL w_ = fs_hash [slot].head; 3367 WL w_ = fs_hash [slot].head;
2236 fs_hash [slot].head = 0; 3368 fs_hash [slot].head = 0;
2237 3369
2238 while (w_) 3370 while (w_)
… …
2243 w->wd = -1; 3375 w->wd = -1;
2244 3376
2245 if (fs_fd >= 0) 3377 if (fs_fd >= 0)
2246 infy_add (EV_A_ w); /* re-add, no matter what */ 3378 infy_add (EV_A_ w); /* re-add, no matter what */
2247 else 3379 else
3380 {
3381 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3382 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2248 ev_timer_start (EV_A_ &w->timer); 3383 ev_timer_again (EV_A_ &w->timer);
3384 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3385 }
2249 } 3386 }
2250
2251 } 3387 }
2252} 3388}
2253 3389
3390#endif
3391
3392#ifdef _WIN32
3393# define EV_LSTAT(p,b) _stati64 (p, b)
3394#else
3395# define EV_LSTAT(p,b) lstat (p, b)
2254#endif 3396#endif
2255 3397
2256void 3398void
2257ev_stat_stat (EV_P_ ev_stat *w) 3399ev_stat_stat (EV_P_ ev_stat *w)
2258{ 3400{
… …
2265static void noinline 3407static void noinline
2266stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3408stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2267{ 3409{
2268 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3410 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2269 3411
2270 /* we copy this here each the time so that */ 3412 ev_statdata prev = w->attr;
2271 /* prev has the old value when the callback gets invoked */
2272 w->prev = w->attr;
2273 ev_stat_stat (EV_A_ w); 3413 ev_stat_stat (EV_A_ w);
2274 3414
2275 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3415 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2276 if ( 3416 if (
2277 w->prev.st_dev != w->attr.st_dev 3417 prev.st_dev != w->attr.st_dev
2278 || w->prev.st_ino != w->attr.st_ino 3418 || prev.st_ino != w->attr.st_ino
2279 || w->prev.st_mode != w->attr.st_mode 3419 || prev.st_mode != w->attr.st_mode
2280 || w->prev.st_nlink != w->attr.st_nlink 3420 || prev.st_nlink != w->attr.st_nlink
2281 || w->prev.st_uid != w->attr.st_uid 3421 || prev.st_uid != w->attr.st_uid
2282 || w->prev.st_gid != w->attr.st_gid 3422 || prev.st_gid != w->attr.st_gid
2283 || w->prev.st_rdev != w->attr.st_rdev 3423 || prev.st_rdev != w->attr.st_rdev
2284 || w->prev.st_size != w->attr.st_size 3424 || prev.st_size != w->attr.st_size
2285 || w->prev.st_atime != w->attr.st_atime 3425 || prev.st_atime != w->attr.st_atime
2286 || w->prev.st_mtime != w->attr.st_mtime 3426 || prev.st_mtime != w->attr.st_mtime
2287 || w->prev.st_ctime != w->attr.st_ctime 3427 || prev.st_ctime != w->attr.st_ctime
2288 ) { 3428 ) {
3429 /* we only update w->prev on actual differences */
3430 /* in case we test more often than invoke the callback, */
3431 /* to ensure that prev is always different to attr */
3432 w->prev = prev;
3433
2289 #if EV_USE_INOTIFY 3434 #if EV_USE_INOTIFY
3435 if (fs_fd >= 0)
3436 {
2290 infy_del (EV_A_ w); 3437 infy_del (EV_A_ w);
2291 infy_add (EV_A_ w); 3438 infy_add (EV_A_ w);
2292 ev_stat_stat (EV_A_ w); /* avoid race... */ 3439 ev_stat_stat (EV_A_ w); /* avoid race... */
3440 }
2293 #endif 3441 #endif
2294 3442
2295 ev_feed_event (EV_A_ w, EV_STAT); 3443 ev_feed_event (EV_A_ w, EV_STAT);
2296 } 3444 }
2297} 3445}
… …
2300ev_stat_start (EV_P_ ev_stat *w) 3448ev_stat_start (EV_P_ ev_stat *w)
2301{ 3449{
2302 if (expect_false (ev_is_active (w))) 3450 if (expect_false (ev_is_active (w)))
2303 return; 3451 return;
2304 3452
2305 /* since we use memcmp, we need to clear any padding data etc. */
2306 memset (&w->prev, 0, sizeof (ev_statdata));
2307 memset (&w->attr, 0, sizeof (ev_statdata));
2308
2309 ev_stat_stat (EV_A_ w); 3453 ev_stat_stat (EV_A_ w);
2310 3454
3455 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2311 if (w->interval < MIN_STAT_INTERVAL) 3456 w->interval = MIN_STAT_INTERVAL;
2312 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2313 3457
2314 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3458 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2315 ev_set_priority (&w->timer, ev_priority (w)); 3459 ev_set_priority (&w->timer, ev_priority (w));
2316 3460
2317#if EV_USE_INOTIFY 3461#if EV_USE_INOTIFY
2318 infy_init (EV_A); 3462 infy_init (EV_A);
2319 3463
2320 if (fs_fd >= 0) 3464 if (fs_fd >= 0)
2321 infy_add (EV_A_ w); 3465 infy_add (EV_A_ w);
2322 else 3466 else
2323#endif 3467#endif
3468 {
2324 ev_timer_start (EV_A_ &w->timer); 3469 ev_timer_again (EV_A_ &w->timer);
3470 ev_unref (EV_A);
3471 }
2325 3472
2326 ev_start (EV_A_ (W)w, 1); 3473 ev_start (EV_A_ (W)w, 1);
3474
3475 EV_FREQUENT_CHECK;
2327} 3476}
2328 3477
2329void 3478void
2330ev_stat_stop (EV_P_ ev_stat *w) 3479ev_stat_stop (EV_P_ ev_stat *w)
2331{ 3480{
2332 clear_pending (EV_A_ (W)w); 3481 clear_pending (EV_A_ (W)w);
2333 if (expect_false (!ev_is_active (w))) 3482 if (expect_false (!ev_is_active (w)))
2334 return; 3483 return;
2335 3484
3485 EV_FREQUENT_CHECK;
3486
2336#if EV_USE_INOTIFY 3487#if EV_USE_INOTIFY
2337 infy_del (EV_A_ w); 3488 infy_del (EV_A_ w);
2338#endif 3489#endif
3490
3491 if (ev_is_active (&w->timer))
3492 {
3493 ev_ref (EV_A);
2339 ev_timer_stop (EV_A_ &w->timer); 3494 ev_timer_stop (EV_A_ &w->timer);
3495 }
2340 3496
2341 ev_stop (EV_A_ (W)w); 3497 ev_stop (EV_A_ (W)w);
3498
3499 EV_FREQUENT_CHECK;
2342} 3500}
2343#endif 3501#endif
2344 3502
2345#if EV_IDLE_ENABLE 3503#if EV_IDLE_ENABLE
2346void 3504void
… …
2349 if (expect_false (ev_is_active (w))) 3507 if (expect_false (ev_is_active (w)))
2350 return; 3508 return;
2351 3509
2352 pri_adjust (EV_A_ (W)w); 3510 pri_adjust (EV_A_ (W)w);
2353 3511
3512 EV_FREQUENT_CHECK;
3513
2354 { 3514 {
2355 int active = ++idlecnt [ABSPRI (w)]; 3515 int active = ++idlecnt [ABSPRI (w)];
2356 3516
2357 ++idleall; 3517 ++idleall;
2358 ev_start (EV_A_ (W)w, active); 3518 ev_start (EV_A_ (W)w, active);
2359 3519
2360 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3520 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2361 idles [ABSPRI (w)][active - 1] = w; 3521 idles [ABSPRI (w)][active - 1] = w;
2362 } 3522 }
3523
3524 EV_FREQUENT_CHECK;
2363} 3525}
2364 3526
2365void 3527void
2366ev_idle_stop (EV_P_ ev_idle *w) 3528ev_idle_stop (EV_P_ ev_idle *w)
2367{ 3529{
2368 clear_pending (EV_A_ (W)w); 3530 clear_pending (EV_A_ (W)w);
2369 if (expect_false (!ev_is_active (w))) 3531 if (expect_false (!ev_is_active (w)))
2370 return; 3532 return;
2371 3533
3534 EV_FREQUENT_CHECK;
3535
2372 { 3536 {
2373 int active = ev_active (w); 3537 int active = ev_active (w);
2374 3538
2375 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3539 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2376 ev_active (idles [ABSPRI (w)][active - 1]) = active; 3540 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2377 3541
2378 ev_stop (EV_A_ (W)w); 3542 ev_stop (EV_A_ (W)w);
2379 --idleall; 3543 --idleall;
2380 } 3544 }
2381}
2382#endif
2383 3545
3546 EV_FREQUENT_CHECK;
3547}
3548#endif
3549
3550#if EV_PREPARE_ENABLE
2384void 3551void
2385ev_prepare_start (EV_P_ ev_prepare *w) 3552ev_prepare_start (EV_P_ ev_prepare *w)
2386{ 3553{
2387 if (expect_false (ev_is_active (w))) 3554 if (expect_false (ev_is_active (w)))
2388 return; 3555 return;
3556
3557 EV_FREQUENT_CHECK;
2389 3558
2390 ev_start (EV_A_ (W)w, ++preparecnt); 3559 ev_start (EV_A_ (W)w, ++preparecnt);
2391 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3560 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2392 prepares [preparecnt - 1] = w; 3561 prepares [preparecnt - 1] = w;
3562
3563 EV_FREQUENT_CHECK;
2393} 3564}
2394 3565
2395void 3566void
2396ev_prepare_stop (EV_P_ ev_prepare *w) 3567ev_prepare_stop (EV_P_ ev_prepare *w)
2397{ 3568{
2398 clear_pending (EV_A_ (W)w); 3569 clear_pending (EV_A_ (W)w);
2399 if (expect_false (!ev_is_active (w))) 3570 if (expect_false (!ev_is_active (w)))
2400 return; 3571 return;
2401 3572
3573 EV_FREQUENT_CHECK;
3574
2402 { 3575 {
2403 int active = ev_active (w); 3576 int active = ev_active (w);
2404 3577
2405 prepares [active - 1] = prepares [--preparecnt]; 3578 prepares [active - 1] = prepares [--preparecnt];
2406 ev_active (prepares [active - 1]) = active; 3579 ev_active (prepares [active - 1]) = active;
2407 } 3580 }
2408 3581
2409 ev_stop (EV_A_ (W)w); 3582 ev_stop (EV_A_ (W)w);
2410}
2411 3583
3584 EV_FREQUENT_CHECK;
3585}
3586#endif
3587
3588#if EV_CHECK_ENABLE
2412void 3589void
2413ev_check_start (EV_P_ ev_check *w) 3590ev_check_start (EV_P_ ev_check *w)
2414{ 3591{
2415 if (expect_false (ev_is_active (w))) 3592 if (expect_false (ev_is_active (w)))
2416 return; 3593 return;
3594
3595 EV_FREQUENT_CHECK;
2417 3596
2418 ev_start (EV_A_ (W)w, ++checkcnt); 3597 ev_start (EV_A_ (W)w, ++checkcnt);
2419 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3598 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2420 checks [checkcnt - 1] = w; 3599 checks [checkcnt - 1] = w;
3600
3601 EV_FREQUENT_CHECK;
2421} 3602}
2422 3603
2423void 3604void
2424ev_check_stop (EV_P_ ev_check *w) 3605ev_check_stop (EV_P_ ev_check *w)
2425{ 3606{
2426 clear_pending (EV_A_ (W)w); 3607 clear_pending (EV_A_ (W)w);
2427 if (expect_false (!ev_is_active (w))) 3608 if (expect_false (!ev_is_active (w)))
2428 return; 3609 return;
2429 3610
3611 EV_FREQUENT_CHECK;
3612
2430 { 3613 {
2431 int active = ev_active (w); 3614 int active = ev_active (w);
2432 3615
2433 checks [active - 1] = checks [--checkcnt]; 3616 checks [active - 1] = checks [--checkcnt];
2434 ev_active (checks [active - 1]) = active; 3617 ev_active (checks [active - 1]) = active;
2435 } 3618 }
2436 3619
2437 ev_stop (EV_A_ (W)w); 3620 ev_stop (EV_A_ (W)w);
3621
3622 EV_FREQUENT_CHECK;
2438} 3623}
3624#endif
2439 3625
2440#if EV_EMBED_ENABLE 3626#if EV_EMBED_ENABLE
2441void noinline 3627void noinline
2442ev_embed_sweep (EV_P_ ev_embed *w) 3628ev_embed_sweep (EV_P_ ev_embed *w)
2443{ 3629{
2444 ev_loop (w->other, EVLOOP_NONBLOCK); 3630 ev_run (w->other, EVRUN_NOWAIT);
2445} 3631}
2446 3632
2447static void 3633static void
2448embed_io_cb (EV_P_ ev_io *io, int revents) 3634embed_io_cb (EV_P_ ev_io *io, int revents)
2449{ 3635{
2450 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3636 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2451 3637
2452 if (ev_cb (w)) 3638 if (ev_cb (w))
2453 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3639 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2454 else 3640 else
2455 ev_loop (w->other, EVLOOP_NONBLOCK); 3641 ev_run (w->other, EVRUN_NOWAIT);
2456} 3642}
2457 3643
2458static void 3644static void
2459embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3645embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2460{ 3646{
2461 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3647 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2462 3648
2463 { 3649 {
2464 struct ev_loop *loop = w->other; 3650 EV_P = w->other;
2465 3651
2466 while (fdchangecnt) 3652 while (fdchangecnt)
2467 { 3653 {
2468 fd_reify (EV_A); 3654 fd_reify (EV_A);
2469 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3655 ev_run (EV_A_ EVRUN_NOWAIT);
2470 } 3656 }
2471 } 3657 }
3658}
3659
3660static void
3661embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3662{
3663 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3664
3665 ev_embed_stop (EV_A_ w);
3666
3667 {
3668 EV_P = w->other;
3669
3670 ev_loop_fork (EV_A);
3671 ev_run (EV_A_ EVRUN_NOWAIT);
3672 }
3673
3674 ev_embed_start (EV_A_ w);
2472} 3675}
2473 3676
2474#if 0 3677#if 0
2475static void 3678static void
2476embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3679embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2484{ 3687{
2485 if (expect_false (ev_is_active (w))) 3688 if (expect_false (ev_is_active (w)))
2486 return; 3689 return;
2487 3690
2488 { 3691 {
2489 struct ev_loop *loop = w->other; 3692 EV_P = w->other;
2490 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3693 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2491 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3694 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2492 } 3695 }
3696
3697 EV_FREQUENT_CHECK;
2493 3698
2494 ev_set_priority (&w->io, ev_priority (w)); 3699 ev_set_priority (&w->io, ev_priority (w));
2495 ev_io_start (EV_A_ &w->io); 3700 ev_io_start (EV_A_ &w->io);
2496 3701
2497 ev_prepare_init (&w->prepare, embed_prepare_cb); 3702 ev_prepare_init (&w->prepare, embed_prepare_cb);
2498 ev_set_priority (&w->prepare, EV_MINPRI); 3703 ev_set_priority (&w->prepare, EV_MINPRI);
2499 ev_prepare_start (EV_A_ &w->prepare); 3704 ev_prepare_start (EV_A_ &w->prepare);
2500 3705
3706 ev_fork_init (&w->fork, embed_fork_cb);
3707 ev_fork_start (EV_A_ &w->fork);
3708
2501 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 3709 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2502 3710
2503 ev_start (EV_A_ (W)w, 1); 3711 ev_start (EV_A_ (W)w, 1);
3712
3713 EV_FREQUENT_CHECK;
2504} 3714}
2505 3715
2506void 3716void
2507ev_embed_stop (EV_P_ ev_embed *w) 3717ev_embed_stop (EV_P_ ev_embed *w)
2508{ 3718{
2509 clear_pending (EV_A_ (W)w); 3719 clear_pending (EV_A_ (W)w);
2510 if (expect_false (!ev_is_active (w))) 3720 if (expect_false (!ev_is_active (w)))
2511 return; 3721 return;
2512 3722
3723 EV_FREQUENT_CHECK;
3724
2513 ev_io_stop (EV_A_ &w->io); 3725 ev_io_stop (EV_A_ &w->io);
2514 ev_prepare_stop (EV_A_ &w->prepare); 3726 ev_prepare_stop (EV_A_ &w->prepare);
3727 ev_fork_stop (EV_A_ &w->fork);
2515 3728
2516 ev_stop (EV_A_ (W)w); 3729 ev_stop (EV_A_ (W)w);
3730
3731 EV_FREQUENT_CHECK;
2517} 3732}
2518#endif 3733#endif
2519 3734
2520#if EV_FORK_ENABLE 3735#if EV_FORK_ENABLE
2521void 3736void
2522ev_fork_start (EV_P_ ev_fork *w) 3737ev_fork_start (EV_P_ ev_fork *w)
2523{ 3738{
2524 if (expect_false (ev_is_active (w))) 3739 if (expect_false (ev_is_active (w)))
2525 return; 3740 return;
2526 3741
3742 EV_FREQUENT_CHECK;
3743
2527 ev_start (EV_A_ (W)w, ++forkcnt); 3744 ev_start (EV_A_ (W)w, ++forkcnt);
2528 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3745 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2529 forks [forkcnt - 1] = w; 3746 forks [forkcnt - 1] = w;
3747
3748 EV_FREQUENT_CHECK;
2530} 3749}
2531 3750
2532void 3751void
2533ev_fork_stop (EV_P_ ev_fork *w) 3752ev_fork_stop (EV_P_ ev_fork *w)
2534{ 3753{
2535 clear_pending (EV_A_ (W)w); 3754 clear_pending (EV_A_ (W)w);
2536 if (expect_false (!ev_is_active (w))) 3755 if (expect_false (!ev_is_active (w)))
2537 return; 3756 return;
2538 3757
3758 EV_FREQUENT_CHECK;
3759
2539 { 3760 {
2540 int active = ev_active (w); 3761 int active = ev_active (w);
2541 3762
2542 forks [active - 1] = forks [--forkcnt]; 3763 forks [active - 1] = forks [--forkcnt];
2543 ev_active (forks [active - 1]) = active; 3764 ev_active (forks [active - 1]) = active;
2544 } 3765 }
2545 3766
2546 ev_stop (EV_A_ (W)w); 3767 ev_stop (EV_A_ (W)w);
3768
3769 EV_FREQUENT_CHECK;
3770}
3771#endif
3772
3773#if EV_CLEANUP_ENABLE
3774void
3775ev_cleanup_start (EV_P_ ev_cleanup *w)
3776{
3777 if (expect_false (ev_is_active (w)))
3778 return;
3779
3780 EV_FREQUENT_CHECK;
3781
3782 ev_start (EV_A_ (W)w, ++cleanupcnt);
3783 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3784 cleanups [cleanupcnt - 1] = w;
3785
3786 /* cleanup watchers should never keep a refcount on the loop */
3787 ev_unref (EV_A);
3788 EV_FREQUENT_CHECK;
3789}
3790
3791void
3792ev_cleanup_stop (EV_P_ ev_cleanup *w)
3793{
3794 clear_pending (EV_A_ (W)w);
3795 if (expect_false (!ev_is_active (w)))
3796 return;
3797
3798 EV_FREQUENT_CHECK;
3799 ev_ref (EV_A);
3800
3801 {
3802 int active = ev_active (w);
3803
3804 cleanups [active - 1] = cleanups [--cleanupcnt];
3805 ev_active (cleanups [active - 1]) = active;
3806 }
3807
3808 ev_stop (EV_A_ (W)w);
3809
3810 EV_FREQUENT_CHECK;
2547} 3811}
2548#endif 3812#endif
2549 3813
2550#if EV_ASYNC_ENABLE 3814#if EV_ASYNC_ENABLE
2551void 3815void
2552ev_async_start (EV_P_ ev_async *w) 3816ev_async_start (EV_P_ ev_async *w)
2553{ 3817{
2554 if (expect_false (ev_is_active (w))) 3818 if (expect_false (ev_is_active (w)))
2555 return; 3819 return;
2556 3820
3821 w->sent = 0;
3822
2557 evpipe_init (EV_A); 3823 evpipe_init (EV_A);
3824
3825 EV_FREQUENT_CHECK;
2558 3826
2559 ev_start (EV_A_ (W)w, ++asynccnt); 3827 ev_start (EV_A_ (W)w, ++asynccnt);
2560 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 3828 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2561 asyncs [asynccnt - 1] = w; 3829 asyncs [asynccnt - 1] = w;
3830
3831 EV_FREQUENT_CHECK;
2562} 3832}
2563 3833
2564void 3834void
2565ev_async_stop (EV_P_ ev_async *w) 3835ev_async_stop (EV_P_ ev_async *w)
2566{ 3836{
2567 clear_pending (EV_A_ (W)w); 3837 clear_pending (EV_A_ (W)w);
2568 if (expect_false (!ev_is_active (w))) 3838 if (expect_false (!ev_is_active (w)))
2569 return; 3839 return;
2570 3840
3841 EV_FREQUENT_CHECK;
3842
2571 { 3843 {
2572 int active = ev_active (w); 3844 int active = ev_active (w);
2573 3845
2574 asyncs [active - 1] = asyncs [--asynccnt]; 3846 asyncs [active - 1] = asyncs [--asynccnt];
2575 ev_active (asyncs [active - 1]) = active; 3847 ev_active (asyncs [active - 1]) = active;
2576 } 3848 }
2577 3849
2578 ev_stop (EV_A_ (W)w); 3850 ev_stop (EV_A_ (W)w);
3851
3852 EV_FREQUENT_CHECK;
2579} 3853}
2580 3854
2581void 3855void
2582ev_async_send (EV_P_ ev_async *w) 3856ev_async_send (EV_P_ ev_async *w)
2583{ 3857{
2584 w->sent = 1; 3858 w->sent = 1;
2585 evpipe_write (EV_A_ &gotasync); 3859 evpipe_write (EV_A_ &async_pending);
2586} 3860}
2587#endif 3861#endif
2588 3862
2589/*****************************************************************************/ 3863/*****************************************************************************/
2590 3864
… …
2600once_cb (EV_P_ struct ev_once *once, int revents) 3874once_cb (EV_P_ struct ev_once *once, int revents)
2601{ 3875{
2602 void (*cb)(int revents, void *arg) = once->cb; 3876 void (*cb)(int revents, void *arg) = once->cb;
2603 void *arg = once->arg; 3877 void *arg = once->arg;
2604 3878
2605 ev_io_stop (EV_A_ &once->io); 3879 ev_io_stop (EV_A_ &once->io);
2606 ev_timer_stop (EV_A_ &once->to); 3880 ev_timer_stop (EV_A_ &once->to);
2607 ev_free (once); 3881 ev_free (once);
2608 3882
2609 cb (revents, arg); 3883 cb (revents, arg);
2610} 3884}
2611 3885
2612static void 3886static void
2613once_cb_io (EV_P_ ev_io *w, int revents) 3887once_cb_io (EV_P_ ev_io *w, int revents)
2614{ 3888{
2615 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3889 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3890
3891 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2616} 3892}
2617 3893
2618static void 3894static void
2619once_cb_to (EV_P_ ev_timer *w, int revents) 3895once_cb_to (EV_P_ ev_timer *w, int revents)
2620{ 3896{
2621 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3897 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3898
3899 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2622} 3900}
2623 3901
2624void 3902void
2625ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3903ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2626{ 3904{
2627 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3905 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2628 3906
2629 if (expect_false (!once)) 3907 if (expect_false (!once))
2630 { 3908 {
2631 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3909 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2632 return; 3910 return;
2633 } 3911 }
2634 3912
2635 once->cb = cb; 3913 once->cb = cb;
2636 once->arg = arg; 3914 once->arg = arg;
… …
2648 ev_timer_set (&once->to, timeout, 0.); 3926 ev_timer_set (&once->to, timeout, 0.);
2649 ev_timer_start (EV_A_ &once->to); 3927 ev_timer_start (EV_A_ &once->to);
2650 } 3928 }
2651} 3929}
2652 3930
3931/*****************************************************************************/
3932
3933#if EV_WALK_ENABLE
3934void ecb_cold
3935ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3936{
3937 int i, j;
3938 ev_watcher_list *wl, *wn;
3939
3940 if (types & (EV_IO | EV_EMBED))
3941 for (i = 0; i < anfdmax; ++i)
3942 for (wl = anfds [i].head; wl; )
3943 {
3944 wn = wl->next;
3945
3946#if EV_EMBED_ENABLE
3947 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3948 {
3949 if (types & EV_EMBED)
3950 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3951 }
3952 else
3953#endif
3954#if EV_USE_INOTIFY
3955 if (ev_cb ((ev_io *)wl) == infy_cb)
3956 ;
3957 else
3958#endif
3959 if ((ev_io *)wl != &pipe_w)
3960 if (types & EV_IO)
3961 cb (EV_A_ EV_IO, wl);
3962
3963 wl = wn;
3964 }
3965
3966 if (types & (EV_TIMER | EV_STAT))
3967 for (i = timercnt + HEAP0; i-- > HEAP0; )
3968#if EV_STAT_ENABLE
3969 /*TODO: timer is not always active*/
3970 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3971 {
3972 if (types & EV_STAT)
3973 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3974 }
3975 else
3976#endif
3977 if (types & EV_TIMER)
3978 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3979
3980#if EV_PERIODIC_ENABLE
3981 if (types & EV_PERIODIC)
3982 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3983 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3984#endif
3985
3986#if EV_IDLE_ENABLE
3987 if (types & EV_IDLE)
3988 for (j = NUMPRI; i--; )
3989 for (i = idlecnt [j]; i--; )
3990 cb (EV_A_ EV_IDLE, idles [j][i]);
3991#endif
3992
3993#if EV_FORK_ENABLE
3994 if (types & EV_FORK)
3995 for (i = forkcnt; i--; )
3996 if (ev_cb (forks [i]) != embed_fork_cb)
3997 cb (EV_A_ EV_FORK, forks [i]);
3998#endif
3999
4000#if EV_ASYNC_ENABLE
4001 if (types & EV_ASYNC)
4002 for (i = asynccnt; i--; )
4003 cb (EV_A_ EV_ASYNC, asyncs [i]);
4004#endif
4005
4006#if EV_PREPARE_ENABLE
4007 if (types & EV_PREPARE)
4008 for (i = preparecnt; i--; )
4009# if EV_EMBED_ENABLE
4010 if (ev_cb (prepares [i]) != embed_prepare_cb)
4011# endif
4012 cb (EV_A_ EV_PREPARE, prepares [i]);
4013#endif
4014
4015#if EV_CHECK_ENABLE
4016 if (types & EV_CHECK)
4017 for (i = checkcnt; i--; )
4018 cb (EV_A_ EV_CHECK, checks [i]);
4019#endif
4020
4021#if EV_SIGNAL_ENABLE
4022 if (types & EV_SIGNAL)
4023 for (i = 0; i < EV_NSIG - 1; ++i)
4024 for (wl = signals [i].head; wl; )
4025 {
4026 wn = wl->next;
4027 cb (EV_A_ EV_SIGNAL, wl);
4028 wl = wn;
4029 }
4030#endif
4031
4032#if EV_CHILD_ENABLE
4033 if (types & EV_CHILD)
4034 for (i = (EV_PID_HASHSIZE); i--; )
4035 for (wl = childs [i]; wl; )
4036 {
4037 wn = wl->next;
4038 cb (EV_A_ EV_CHILD, wl);
4039 wl = wn;
4040 }
4041#endif
4042/* EV_STAT 0x00001000 /* stat data changed */
4043/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4044}
4045#endif
4046
2653#if EV_MULTIPLICITY 4047#if EV_MULTIPLICITY
2654 #include "ev_wrap.h" 4048 #include "ev_wrap.h"
2655#endif 4049#endif
2656 4050
2657#ifdef __cplusplus 4051EV_CPP(})
2658}
2659#endif
2660 4052

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