[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.337 by root, Wed Mar 10 09:18:24 2010 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010 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
41	extern "C" {
42	#endif
43
44	/* this big block deduces configuration from config.h */	40	/* this big block deduces configuration from config.h */
45	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
46	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
47	# include EV_CONFIG_H	43	# include EV_CONFIG_H
48	# else	44	# else
49	# include "config.h"	45	# include "config.h"
50	# endif	46	# endif
		47
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
51		53
52	# if HAVE_CLOCK_SYSCALL	54	# if HAVE_CLOCK_SYSCALL
53	# ifndef EV_USE_CLOCK_SYSCALL	55	# ifndef EV_USE_CLOCK_SYSCALL
54	# define EV_USE_CLOCK_SYSCALL 1	56	# define EV_USE_CLOCK_SYSCALL 1
55	# ifndef EV_USE_REALTIME	57	# ifndef EV_USE_REALTIME
…		…
77	# ifndef EV_USE_REALTIME	79	# ifndef EV_USE_REALTIME
78	# define EV_USE_REALTIME 0	80	# define EV_USE_REALTIME 0
79	# endif	81	# endif
80	# endif	82	# endif
81		83
		84	# if HAVE_NANOSLEEP
82	# ifndef EV_USE_NANOSLEEP	85	# ifndef EV_USE_NANOSLEEP
83	# if HAVE_NANOSLEEP
84	# define EV_USE_NANOSLEEP 1	86	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		87	# endif
85	# else	88	# else
		89	# undef EV_USE_NANOSLEEP
86	# 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
87	# endif	96	# endif
		97	# else
		98	# undef EV_USE_SELECT
		99	# define EV_USE_SELECT 0
88	# endif	100	# endif
89		101
		102	# if HAVE_POLL && HAVE_POLL_H
90	# ifndef EV_USE_SELECT	103	# ifndef EV_USE_POLL
91	# if HAVE_SELECT && HAVE_SYS_SELECT_H	104	# define EV_USE_POLL EV_FEATURE_BACKENDS
92	# define EV_USE_SELECT 1
93	# else
94	# define EV_USE_SELECT 0
95	# endif	105	# endif
96	# endif
97
98	# ifndef EV_USE_POLL
99	# if HAVE_POLL && HAVE_POLL_H
100	# define EV_USE_POLL 1
101	# else	106	# else
		107	# undef EV_USE_POLL
102	# define EV_USE_POLL 0	108	# define EV_USE_POLL 0
103	# endif
104	# endif	109	# endif
105		110
106	# ifndef EV_USE_EPOLL
107	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	111	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108	# define EV_USE_EPOLL 1	112	# ifndef EV_USE_EPOLL
109	# else	113	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
110	# define EV_USE_EPOLL 0
111	# endif	114	# endif
		115	# else
		116	# undef EV_USE_EPOLL
		117	# define EV_USE_EPOLL 0
112	# endif	118	# endif
113		119
114	# ifndef EV_USE_KQUEUE
115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H	120	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116	# define EV_USE_KQUEUE 1	121	# ifndef EV_USE_KQUEUE
117	# else	122	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
118	# define EV_USE_KQUEUE 0
119	# endif	123	# endif
		124	# else
		125	# undef EV_USE_KQUEUE
		126	# define EV_USE_KQUEUE 0
120	# endif	127	# endif
121		128
122	# ifndef EV_USE_PORT
123	# if HAVE_PORT_H && HAVE_PORT_CREATE	129	# if HAVE_PORT_H && HAVE_PORT_CREATE
124	# define EV_USE_PORT 1	130	# ifndef EV_USE_PORT
125	# else	131	# define EV_USE_PORT EV_FEATURE_BACKENDS
126	# define EV_USE_PORT 0
127	# endif	132	# endif
		133	# else
		134	# undef EV_USE_PORT
		135	# define EV_USE_PORT 0
128	# endif	136	# endif
129		137
130	# ifndef EV_USE_INOTIFY
131	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H	138	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132	# define EV_USE_INOTIFY 1	139	# ifndef EV_USE_INOTIFY
133	# else
134	# define EV_USE_INOTIFY 0	140	# define EV_USE_INOTIFY EV_FEATURE_OS
135	# endif	141	# endif
		142	# else
		143	# undef EV_USE_INOTIFY
		144	# define EV_USE_INOTIFY 0
136	# endif	145	# endif
137		146
138	# ifndef EV_USE_SIGNALFD
139	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H	147	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140	# define EV_USE_SIGNALFD 1	148	# ifndef EV_USE_SIGNALFD
141	# else
142	# define EV_USE_SIGNALFD 0	149	# define EV_USE_SIGNALFD EV_FEATURE_OS
143	# endif	150	# endif
		151	# else
		152	# undef EV_USE_SIGNALFD
		153	# define EV_USE_SIGNALFD 0
144	# endif	154	# endif
145		155
		156	# if HAVE_EVENTFD
146	# ifndef EV_USE_EVENTFD	157	# ifndef EV_USE_EVENTFD
147	# if HAVE_EVENTFD
148	# define EV_USE_EVENTFD 1	158	# define EV_USE_EVENTFD EV_FEATURE_OS
149	# else
150	# define EV_USE_EVENTFD 0
151	# endif	159	# endif
		160	# else
		161	# undef EV_USE_EVENTFD
		162	# define EV_USE_EVENTFD 0
152	# endif	163	# endif
153		164
154	#endif	165	#endif
155		166
156	#include <math.h>
157	#include <stdlib.h>	167	#include <stdlib.h>
158	#include <string.h>	168	#include <string.h>
159	#include <fcntl.h>	169	#include <fcntl.h>
160	#include <stddef.h>	170	#include <stddef.h>
161		171
…		…
172	#ifdef EV_H	182	#ifdef EV_H
173	# include EV_H	183	# include EV_H
174	#else	184	#else
175	# include "ev.h"	185	# include "ev.h"
176	#endif	186	#endif
		187
		188	EV_CPP(extern "C" {)
177		189
178	#ifndef _WIN32	190	#ifndef _WIN32
179	# include <sys/time.h>	191	# include <sys/time.h>
180	# include <sys/wait.h>	192	# include <sys/wait.h>
181	# include <unistd.h>	193	# include <unistd.h>
…		…
186	# ifndef EV_SELECT_IS_WINSOCKET	198	# ifndef EV_SELECT_IS_WINSOCKET
187	# define EV_SELECT_IS_WINSOCKET 1	199	# define EV_SELECT_IS_WINSOCKET 1
188	# endif	200	# endif
189	# undef EV_AVOID_STDIO	201	# undef EV_AVOID_STDIO
190	#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
191		211
192	/* 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 */
193		213
194	/* try to deduce the maximum number of signals on this platform */	214	/* try to deduce the maximum number of signals on this platform */
195	#if defined (EV_NSIG)	215	#if defined (EV_NSIG)
…		…
217	/* to make it compile regardless, just remove the above line, */	237	/* to make it compile regardless, just remove the above line, */
218	/* but consider reporting it, too! :) */	238	/* but consider reporting it, too! :) */
219	# define EV_NSIG 65	239	# define EV_NSIG 65
220	#endif	240	#endif
221		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
222	#ifndef EV_USE_CLOCK_SYSCALL	246	#ifndef EV_USE_CLOCK_SYSCALL
223	# if __linux && __GLIBC__ >= 2	247	# if __linux && __GLIBC__ >= 2
224	# define EV_USE_CLOCK_SYSCALL 1	248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
225	# else	249	# else
226	# define EV_USE_CLOCK_SYSCALL 0	250	# define EV_USE_CLOCK_SYSCALL 0
227	# endif	251	# endif
228	#endif	252	#endif
229		253
230	#ifndef EV_USE_MONOTONIC	254	#ifndef EV_USE_MONOTONIC
231	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	255	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
232	# define EV_USE_MONOTONIC 1	256	# define EV_USE_MONOTONIC EV_FEATURE_OS
233	# else	257	# else
234	# define EV_USE_MONOTONIC 0	258	# define EV_USE_MONOTONIC 0
235	# endif	259	# endif
236	#endif	260	#endif
237		261
…		…
239	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL	263	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
240	#endif	264	#endif
241		265
242	#ifndef EV_USE_NANOSLEEP	266	#ifndef EV_USE_NANOSLEEP
243	# if _POSIX_C_SOURCE >= 199309L	267	# if _POSIX_C_SOURCE >= 199309L
244	# define EV_USE_NANOSLEEP 1	268	# define EV_USE_NANOSLEEP EV_FEATURE_OS
245	# else	269	# else
246	# define EV_USE_NANOSLEEP 0	270	# define EV_USE_NANOSLEEP 0
247	# endif	271	# endif
248	#endif	272	#endif
249		273
250	#ifndef EV_USE_SELECT	274	#ifndef EV_USE_SELECT
251	# define EV_USE_SELECT 1	275	# define EV_USE_SELECT EV_FEATURE_BACKENDS
252	#endif	276	#endif
253		277
254	#ifndef EV_USE_POLL	278	#ifndef EV_USE_POLL
255	# ifdef _WIN32	279	# ifdef _WIN32
256	# define EV_USE_POLL 0	280	# define EV_USE_POLL 0
257	# else	281	# else
258	# define EV_USE_POLL 1	282	# define EV_USE_POLL EV_FEATURE_BACKENDS
259	# endif	283	# endif
260	#endif	284	#endif
261		285
262	#ifndef EV_USE_EPOLL	286	#ifndef EV_USE_EPOLL
263	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))	287	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
264	# define EV_USE_EPOLL 1	288	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
265	# else	289	# else
266	# define EV_USE_EPOLL 0	290	# define EV_USE_EPOLL 0
267	# endif	291	# endif
268	#endif	292	#endif
269		293
…		…
275	# define EV_USE_PORT 0	299	# define EV_USE_PORT 0
276	#endif	300	#endif
277		301
278	#ifndef EV_USE_INOTIFY	302	#ifndef EV_USE_INOTIFY
279	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))	303	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
280	# define EV_USE_INOTIFY 1	304	# define EV_USE_INOTIFY EV_FEATURE_OS
281	# else	305	# else
282	# define EV_USE_INOTIFY 0	306	# define EV_USE_INOTIFY 0
283	# endif	307	# endif
284	#endif	308	#endif
285		309
286	#ifndef EV_PID_HASHSIZE	310	#ifndef EV_PID_HASHSIZE
287	# if EV_MINIMAL	311	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
288	# define EV_PID_HASHSIZE 1
289	# else
290	# define EV_PID_HASHSIZE 16
291	# endif
292	#endif	312	#endif
293		313
294	#ifndef EV_INOTIFY_HASHSIZE	314	#ifndef EV_INOTIFY_HASHSIZE
295	# if EV_MINIMAL	315	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
296	# define EV_INOTIFY_HASHSIZE 1
297	# else
298	# define EV_INOTIFY_HASHSIZE 16
299	# endif
300	#endif	316	#endif
301		317
302	#ifndef EV_USE_EVENTFD	318	#ifndef EV_USE_EVENTFD
303	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))	319	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
304	# define EV_USE_EVENTFD 1	320	# define EV_USE_EVENTFD EV_FEATURE_OS
305	# else	321	# else
306	# define EV_USE_EVENTFD 0	322	# define EV_USE_EVENTFD 0
307	# endif	323	# endif
308	#endif	324	#endif
309		325
310	#ifndef EV_USE_SIGNALFD	326	#ifndef EV_USE_SIGNALFD
311	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))	327	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
312	# define EV_USE_SIGNALFD 1	328	# define EV_USE_SIGNALFD EV_FEATURE_OS
313	# else	329	# else
314	# define EV_USE_SIGNALFD 0	330	# define EV_USE_SIGNALFD 0
315	# endif	331	# endif
316	#endif	332	#endif
317		333
…		…
320	# define EV_USE_4HEAP 1	336	# define EV_USE_4HEAP 1
321	# define EV_HEAP_CACHE_AT 1	337	# define EV_HEAP_CACHE_AT 1
322	#endif	338	#endif
323		339
324	#ifndef EV_VERIFY	340	#ifndef EV_VERIFY
325	# define EV_VERIFY !EV_MINIMAL	341	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
326	#endif	342	#endif
327		343
328	#ifndef EV_USE_4HEAP	344	#ifndef EV_USE_4HEAP
329	# define EV_USE_4HEAP !EV_MINIMAL	345	# define EV_USE_4HEAP EV_FEATURE_DATA
330	#endif	346	#endif
331		347
332	#ifndef EV_HEAP_CACHE_AT	348	#ifndef EV_HEAP_CACHE_AT
333	# define EV_HEAP_CACHE_AT !EV_MINIMAL	349	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
334	#endif	350	#endif
335		351
336	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */	352	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
337	/* which makes programs even slower. might work on other unices, too. */	353	/* which makes programs even slower. might work on other unices, too. */
338	#if EV_USE_CLOCK_SYSCALL	354	#if EV_USE_CLOCK_SYSCALL
…		…
369	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
370	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
371	#endif	387	#endif
372		388
373	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
374	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
375	# include <sys/select.h>	392	# include <sys/select.h>
376	# endif	393	# endif
377	#endif	394	#endif
378		395
379	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
380	# include <sys/utsname.h>
381	# include <sys/statfs.h>	397	# include <sys/statfs.h>
382	# include <sys/inotify.h>	398	# include <sys/inotify.h>
383	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	399	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
384	# ifndef IN_DONT_FOLLOW	400	# ifndef IN_DONT_FOLLOW
385	# undef EV_USE_INOTIFY	401	# undef EV_USE_INOTIFY
…		…
402	# define EFD_CLOEXEC O_CLOEXEC	418	# define EFD_CLOEXEC O_CLOEXEC
403	# else	419	# else
404	# define EFD_CLOEXEC 02000000	420	# define EFD_CLOEXEC 02000000
405	# endif	421	# endif
406	# endif	422	# endif
407	# ifdef __cplusplus
408	extern "C" {
409	# endif
410	int (eventfd) (unsigned int initval, int flags);	423	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
411	# ifdef __cplusplus
412	}
413	# endif
414	#endif	424	#endif
415		425
416	#if EV_USE_SIGNALFD	426	#if EV_USE_SIGNALFD
417	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	427	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418	# include <stdint.h>	428	# include <stdint.h>
…		…
424	# define SFD_CLOEXEC O_CLOEXEC	434	# define SFD_CLOEXEC O_CLOEXEC
425	# else	435	# else
426	# define SFD_CLOEXEC 02000000	436	# define SFD_CLOEXEC 02000000
427	# endif	437	# endif
428	# endif	438	# endif
429	# ifdef __cplusplus
430	extern "C" {
431	# endif
432	int signalfd (int fd, const sigset_t *mask, int flags);	439	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
433		440
434	struct signalfd_siginfo	441	struct signalfd_siginfo
435	{	442	{
436	uint32_t ssi_signo;	443	uint32_t ssi_signo;
437	char pad[128 - sizeof (uint32_t)];	444	char pad[128 - sizeof (uint32_t)];
438	};	445	};
439	# ifdef __cplusplus
440	}
441	# endif	446	#endif
442	#endif
443
444		447
445	/**/	448	/**/
446		449
447	#if EV_VERIFY >= 3	450	#if EV_VERIFY >= 3
448	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	451	# define EV_FREQUENT_CHECK ev_verify (EV_A)
449	#else	452	#else
450	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
451	#endif	454	#endif
452		455
453	/*	456	/*
454	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
455	* It is added to ev_rt_now when scheduling periodics
456	* to ensure progress, time-wise, even when rounding
457	* errors are against us.
458	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
459	* Better solutions welcome.
460	*/	459	*/
461	#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 /
462		462
463	#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) */
464	#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) */
		465
		466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
		467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
465		468
466	#if __GNUC__ >= 4	469	#if __GNUC__ >= 4
467	# define expect(expr,value) __builtin_expect ((expr),(value))	470	# define expect(expr,value) __builtin_expect ((expr),(value))
468	# define noinline __attribute__ ((noinline))	471	# define noinline __attribute__ ((noinline))
469	#else	472	#else
…		…
476		479
477	#define expect_false(expr) expect ((expr) != 0, 0)	480	#define expect_false(expr) expect ((expr) != 0, 0)
478	#define expect_true(expr) expect ((expr) != 0, 1)	481	#define expect_true(expr) expect ((expr) != 0, 1)
479	#define inline_size static inline	482	#define inline_size static inline
480		483
481	#if EV_MINIMAL	484	#if EV_FEATURE_CODE
		485	# define inline_speed static inline
		486	#else
482	# define inline_speed static noinline	487	# define inline_speed static noinline
483	#else
484	# define inline_speed static inline
485	#endif	488	#endif
486		489
487	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	490	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
488		491
489	#if EV_MINPRI == EV_MAXPRI	492	#if EV_MINPRI == EV_MAXPRI
…		…
502	#define ev_active(w) ((W)(w))->active	505	#define ev_active(w) ((W)(w))->active
503	#define ev_at(w) ((WT)(w))->at	506	#define ev_at(w) ((WT)(w))->at
504		507
505	#if EV_USE_REALTIME	508	#if EV_USE_REALTIME
506	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	509	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
507	/* giving it a reasonably high chance of working on typical architetcures */	510	/* giving it a reasonably high chance of working on typical architectures */
508	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */	511	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
509	#endif	512	#endif
510		513
511	#if EV_USE_MONOTONIC	514	#if EV_USE_MONOTONIC
512	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	515	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
…		…
523	#endif	526	#endif
524		527
525	#ifdef _WIN32	528	#ifdef _WIN32
526	# include "ev_win32.c"	529	# include "ev_win32.c"
527	#endif	530	#endif
		531
		532	/*****************************************************************************/
		533
		534	/* define a suitable floor function (only used by periodics atm) */
		535
		536	#if EV_USE_FLOOR
		537	# include <math.h>
		538	# define ev_floor(v) floor (v)
		539	#else
		540
		541	#include <float.h>
		542
		543	/* a floor() replacement function, should be independent of ev_tstamp type */
		544	static ev_tstamp noinline
		545	ev_floor (ev_tstamp v)
		546	{
		547	/* the choice of shift factor is not terribly important */
		548	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		549	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		550	#else
		551	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		552	#endif
		553
		554	/* argument too large for an unsigned long? */
		555	if (expect_false (v >= shift))
		556	{
		557	ev_tstamp f;
		558
		559	if (v == v - 1.)
		560	return v; /* very large number */
		561
		562	f = shift * ev_floor (v * (1. / shift));
		563	return f + ev_floor (v - f);
		564	}
		565
		566	/* special treatment for negative args? */
		567	if (expect_false (v < 0.))
		568	{
		569	ev_tstamp f = -ev_floor (-v);
		570
		571	return f - (f == v ? 0 : 1);
		572	}
		573
		574	/* fits into an unsigned long */
		575	return (unsigned long)v;
		576	}
		577
		578	#endif
		579
		580	/*****************************************************************************/
		581
		582	#ifdef __linux
		583	# include <sys/utsname.h>
		584	#endif
		585
		586	static unsigned int noinline
		587	ev_linux_version (void)
		588	{
		589	#ifdef __linux
		590	unsigned int v = 0;
		591	struct utsname buf;
		592	int i;
		593	char *p = buf.release;
		594
		595	if (uname (&buf))
		596	return 0;
		597
		598	for (i = 3+1; --i; )
		599	{
		600	unsigned int c = 0;
		601
		602	for (;;)
		603	{
		604	if (p >= '0' && p <= '9')
		605	c = c * 10 + *p++ - '0';
		606	else
		607	{
		608	p += *p == '.';
		609	break;
		610	}
		611	}
		612
		613	v = (v << 8) \| c;
		614	}
		615
		616	return v;
		617	#else
		618	return 0;
		619	#endif
		620	}
528		621
529	/*****************************************************************************/	622	/*****************************************************************************/
530		623
531	#if EV_AVOID_STDIO	624	#if EV_AVOID_STDIO
532	static void noinline	625	static void noinline
…		…
553	if (syserr_cb)	646	if (syserr_cb)
554	syserr_cb (msg);	647	syserr_cb (msg);
555	else	648	else
556	{	649	{
557	#if EV_AVOID_STDIO	650	#if EV_AVOID_STDIO
558	const char *err = strerror (errno);
559
560	ev_printerr (msg);	651	ev_printerr (msg);
561	ev_printerr (": ");	652	ev_printerr (": ");
562	ev_printerr (err);	653	ev_printerr (strerror (errno));
563	ev_printerr ("\n");	654	ev_printerr ("\n");
564	#else	655	#else
565	perror (msg);	656	perror (msg);
566	#endif	657	#endif
567	abort ();	658	abort ();
…		…
601	ptr = alloc (ptr, size);	692	ptr = alloc (ptr, size);
602		693
603	if (!ptr && size)	694	if (!ptr && size)
604	{	695	{
605	#if EV_AVOID_STDIO	696	#if EV_AVOID_STDIO
606	ev_printerr ("libev: memory allocation failed, aborting.\n");	697	ev_printerr ("(libev) memory allocation failed, aborting.\n");
607	#else	698	#else
608	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	699	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
609	#endif	700	#endif
610	abort ();	701	abort ();
611	}	702	}
612		703
613	return ptr;	704	return ptr;
…		…
630	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	721	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
631	unsigned char unused;	722	unsigned char unused;
632	#if EV_USE_EPOLL	723	#if EV_USE_EPOLL
633	unsigned int egen; /* generation counter to counter epoll bugs */	724	unsigned int egen; /* generation counter to counter epoll bugs */
634	#endif	725	#endif
635	#if EV_SELECT_IS_WINSOCKET	726	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
636	SOCKET handle;	727	SOCKET handle;
		728	#endif
		729	#if EV_USE_IOCP
		730	OVERLAPPED or, ow;
637	#endif	731	#endif
638	} ANFD;	732	} ANFD;
639		733
640	/* stores the pending event set for a given watcher */	734	/* stores the pending event set for a given watcher */
641	typedef struct	735	typedef struct
…		…
696		790
697	static int ev_default_loop_ptr;	791	static int ev_default_loop_ptr;
698		792
699	#endif	793	#endif
700		794
701	#if EV_MINIMAL < 2	795	#if EV_FEATURE_API
702	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)	796	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
703	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)	797	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
704	# define EV_INVOKE_PENDING invoke_cb (EV_A)	798	# define EV_INVOKE_PENDING invoke_cb (EV_A)
705	#else	799	#else
706	# define EV_RELEASE_CB (void)0	800	# define EV_RELEASE_CB (void)0
707	# define EV_ACQUIRE_CB (void)0	801	# define EV_ACQUIRE_CB (void)0
708	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	802	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
709	#endif	803	#endif
710		804
711	#define EVUNLOOP_RECURSE 0x80	805	#define EVBREAK_RECURSE 0x80
712		806
713	/*****************************************************************************/	807	/*****************************************************************************/
714		808
715	#ifndef EV_HAVE_EV_TIME	809	#ifndef EV_HAVE_EV_TIME
716	ev_tstamp	810	ev_tstamp
…		…
760	if (delay > 0.)	854	if (delay > 0.)
761	{	855	{
762	#if EV_USE_NANOSLEEP	856	#if EV_USE_NANOSLEEP
763	struct timespec ts;	857	struct timespec ts;
764		858
765	ts.tv_sec = (time_t)delay;	859	EV_TS_SET (ts, delay);
766	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
767
768	nanosleep (&ts, 0);	860	nanosleep (&ts, 0);
769	#elif defined(_WIN32)	861	#elif defined(_WIN32)
770	Sleep ((unsigned long)(delay * 1e3));	862	Sleep ((unsigned long)(delay * 1e3));
771	#else	863	#else
772	struct timeval tv;	864	struct timeval tv;
773		865
774	tv.tv_sec = (time_t)delay;
775	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
776
777	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	866	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
778	/* something not guaranteed by newer posix versions, but guaranteed */	867	/* something not guaranteed by newer posix versions, but guaranteed */
779	/* by older ones */	868	/* by older ones */
		869	EV_TV_SET (tv, delay);
780	select (0, 0, 0, 0, &tv);	870	select (0, 0, 0, 0, &tv);
781	#endif	871	#endif
782	}	872	}
783	}	873	}
784		874
785	/*****************************************************************************/	875	/*****************************************************************************/
786		876
787	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	877	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
788		878
789	/* find a suitable new size for the given array, */	879	/* find a suitable new size for the given array, */
790	/* hopefully by rounding to a ncie-to-malloc size */	880	/* hopefully by rounding to a nice-to-malloc size */
791	inline_size int	881	inline_size int
792	array_nextsize (int elem, int cur, int cnt)	882	array_nextsize (int elem, int cur, int cnt)
793	{	883	{
794	int ncur = cur + 1;	884	int ncur = cur + 1;
795		885
…		…
930	inline_size void	1020	inline_size void
931	fd_reify (EV_P)	1021	fd_reify (EV_P)
932	{	1022	{
933	int i;	1023	int i;
934		1024
		1025	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1026	for (i = 0; i < fdchangecnt; ++i)
		1027	{
		1028	int fd = fdchanges [i];
		1029	ANFD *anfd = anfds + fd;
		1030
		1031	if (anfd->reify & EV__IOFDSET && anfd->head)
		1032	{
		1033	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1034
		1035	if (handle != anfd->handle)
		1036	{
		1037	unsigned long arg;
		1038
		1039	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1040
		1041	/* handle changed, but fd didn't - we need to do it in two steps */
		1042	backend_modify (EV_A_ fd, anfd->events, 0);
		1043	anfd->events = 0;
		1044	anfd->handle = handle;
		1045	}
		1046	}
		1047	}
		1048	#endif
		1049
935	for (i = 0; i < fdchangecnt; ++i)	1050	for (i = 0; i < fdchangecnt; ++i)
936	{	1051	{
937	int fd = fdchanges [i];	1052	int fd = fdchanges [i];
938	ANFD *anfd = anfds + fd;	1053	ANFD *anfd = anfds + fd;
939	ev_io *w;	1054	ev_io *w;
940		1055
941	unsigned char events = 0;	1056	unsigned char o_events = anfd->events;
		1057	unsigned char o_reify = anfd->reify;
942		1058
943	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1059	anfd->reify = 0;
944	events \|= (unsigned char)w->events;
945		1060
946	#if EV_SELECT_IS_WINSOCKET	1061	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
947	if (events)
948	{	1062	{
949	unsigned long arg;	1063	anfd->events = 0;
950	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1064
951	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1065	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		1066	anfd->events \|= (unsigned char)w->events;
		1067
		1068	if (o_events != anfd->events)
		1069	o_reify = EV__IOFDSET; /* actually \|= */
952	}	1070	}
953	#endif
954		1071
955	{	1072	if (o_reify & EV__IOFDSET)
956	unsigned char o_events = anfd->events;
957	unsigned char o_reify = anfd->reify;
958
959	anfd->reify = 0;
960	anfd->events = events;
961
962	if (o_events != events \|\| o_reify & EV__IOFDSET)
963	backend_modify (EV_A_ fd, o_events, events);	1073	backend_modify (EV_A_ fd, o_events, anfd->events);
964	}
965	}	1074	}
966		1075
967	fdchangecnt = 0;	1076	fdchangecnt = 0;
968	}	1077	}
969		1078
…		…
1062	}	1171	}
1063		1172
1064	/*****************************************************************************/	1173	/*****************************************************************************/
1065		1174
1066	/*	1175	/*
1067	* the heap functions want a real array index. array index 0 uis guaranteed to not	1176	* the heap functions want a real array index. array index 0 is guaranteed to not
1068	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives	1177	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1069	* the branching factor of the d-tree.	1178	* the branching factor of the d-tree.
1070	*/	1179	*/
1071		1180
1072	/*	1181	/*
…		…
1259	inline_size void	1368	inline_size void
1260	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1369	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1261	{	1370	{
1262	if (!*flag)	1371	if (!*flag)
1263	{	1372	{
1264	int old_errno = errno; /* save errno because write might clobber it */
1265	char dummy;
1266
1267	*flag = 1;	1373	*flag = 1;
1268		1374
		1375	pipe_write_skipped = 1;
		1376
		1377	if (pipe_write_wanted)
		1378	{
		1379	int old_errno = errno; /* save errno because write will clobber it */
		1380	char dummy;
		1381
		1382	pipe_write_skipped = 0;
		1383
1269	#if EV_USE_EVENTFD	1384	#if EV_USE_EVENTFD
1270	if (evfd >= 0)	1385	if (evfd >= 0)
1271	{	1386	{
1272	uint64_t counter = 1;	1387	uint64_t counter = 1;
1273	write (evfd, &counter, sizeof (uint64_t));	1388	write (evfd, &counter, sizeof (uint64_t));
		1389	}
		1390	else
		1391	#endif
		1392	{
		1393	/* win32 people keep sending patches that change this write() to send() */
		1394	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1395	/* so when you think this write should be a send instead, please find out */
		1396	/* where your send() is from - it's definitely not the microsoft send, and */
		1397	/* tell me. thank you. */
		1398	write (evpipe [1], &dummy, 1);
		1399	}
		1400
		1401	errno = old_errno;
1274	}	1402	}
1275	else
1276	#endif
1277	write (evpipe [1], &dummy, 1);
1278
1279	errno = old_errno;
1280	}	1403	}
1281	}	1404	}
1282		1405
1283	/* called whenever the libev signal pipe */	1406	/* called whenever the libev signal pipe */
1284	/* got some events (signal, async) */	1407	/* got some events (signal, async) */
1285	static void	1408	static void
1286	pipecb (EV_P_ ev_io *iow, int revents)	1409	pipecb (EV_P_ ev_io *iow, int revents)
1287	{	1410	{
1288	int i;	1411	int i;
1289		1412
		1413	if (revents & EV_READ)
		1414	{
1290	#if EV_USE_EVENTFD	1415	#if EV_USE_EVENTFD
1291	if (evfd >= 0)	1416	if (evfd >= 0)
1292	{	1417	{
1293	uint64_t counter;	1418	uint64_t counter;
1294	read (evfd, &counter, sizeof (uint64_t));	1419	read (evfd, &counter, sizeof (uint64_t));
1295	}	1420	}
1296	else	1421	else
1297	#endif	1422	#endif
1298	{	1423	{
1299	char dummy;	1424	char dummy;
		1425	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1300	read (evpipe [0], &dummy, 1);	1426	read (evpipe [0], &dummy, 1);
		1427	}
1301	}	1428	}
1302		1429
		1430	pipe_write_skipped = 0;
		1431
		1432	#if EV_SIGNAL_ENABLE
1303	if (sig_pending)	1433	if (sig_pending)
1304	{	1434	{
1305	sig_pending = 0;	1435	sig_pending = 0;
1306		1436
1307	for (i = EV_NSIG - 1; i--; )	1437	for (i = EV_NSIG - 1; i--; )
1308	if (expect_false (signals [i].pending))	1438	if (expect_false (signals [i].pending))
1309	ev_feed_signal_event (EV_A_ i + 1);	1439	ev_feed_signal_event (EV_A_ i + 1);
1310	}	1440	}
		1441	#endif
1311		1442
1312	#if EV_ASYNC_ENABLE	1443	#if EV_ASYNC_ENABLE
1313	if (async_pending)	1444	if (async_pending)
1314	{	1445	{
1315	async_pending = 0;	1446	async_pending = 0;
…		…
1324	#endif	1455	#endif
1325	}	1456	}
1326		1457
1327	/*****************************************************************************/	1458	/*****************************************************************************/
1328		1459
		1460	void
		1461	ev_feed_signal (int signum)
		1462	{
		1463	#if EV_MULTIPLICITY
		1464	EV_P = signals [signum - 1].loop;
		1465
		1466	if (!EV_A)
		1467	return;
		1468	#endif
		1469
		1470	evpipe_init (EV_A);
		1471
		1472	signals [signum - 1].pending = 1;
		1473	evpipe_write (EV_A_ &sig_pending);
		1474	}
		1475
1329	static void	1476	static void
1330	ev_sighandler (int signum)	1477	ev_sighandler (int signum)
1331	{	1478	{
1332	#if EV_MULTIPLICITY
1333	EV_P = signals [signum - 1].loop;
1334	#endif
1335
1336	#ifdef _WIN32	1479	#ifdef _WIN32
1337	signal (signum, ev_sighandler);	1480	signal (signum, ev_sighandler);
1338	#endif	1481	#endif
1339		1482
1340	signals [signum - 1].pending = 1;	1483	ev_feed_signal (signum);
1341	evpipe_write (EV_A_ &sig_pending);
1342	}	1484	}
1343		1485
1344	void noinline	1486	void noinline
1345	ev_feed_signal_event (EV_P_ int signum)	1487	ev_feed_signal_event (EV_P_ int signum)
1346	{	1488	{
…		…
1403	child_reap (EV_P_ int chain, int pid, int status)	1545	child_reap (EV_P_ int chain, int pid, int status)
1404	{	1546	{
1405	ev_child *w;	1547	ev_child *w;
1406	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);	1548	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
1407		1549
1408	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1550	for (w = (ev_child )childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child )((WL)w)->next)
1409	{	1551	{
1410	if ((w->pid == pid \|\| !w->pid)	1552	if ((w->pid == pid \|\| !w->pid)
1411	&& (!traced \|\| (w->flags & 1)))	1553	&& (!traced \|\| (w->flags & 1)))
1412	{	1554	{
1413	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */	1555	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
…		…
1438	/* make sure we are called again until all children have been reaped */	1580	/* make sure we are called again until all children have been reaped */
1439	/* we need to do it this way so that the callback gets called before we continue */	1581	/* we need to do it this way so that the callback gets called before we continue */
1440	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1582	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1441		1583
1442	child_reap (EV_A_ pid, pid, status);	1584	child_reap (EV_A_ pid, pid, status);
1443	if (EV_PID_HASHSIZE > 1)	1585	if ((EV_PID_HASHSIZE) > 1)
1444	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1586	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1445	}	1587	}
1446		1588
1447	#endif	1589	#endif
1448		1590
1449	/*****************************************************************************/	1591	/*****************************************************************************/
1450		1592
		1593	#if EV_USE_IOCP
		1594	# include "ev_iocp.c"
		1595	#endif
1451	#if EV_USE_PORT	1596	#if EV_USE_PORT
1452	# include "ev_port.c"	1597	# include "ev_port.c"
1453	#endif	1598	#endif
1454	#if EV_USE_KQUEUE	1599	#if EV_USE_KQUEUE
1455	# include "ev_kqueue.c"	1600	# include "ev_kqueue.c"
…		…
1515	#ifdef __APPLE__	1660	#ifdef __APPLE__
1516	/* only select works correctly on that "unix-certified" platform */	1661	/* only select works correctly on that "unix-certified" platform */
1517	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */	1662	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1518	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */	1663	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1519	#endif	1664	#endif
		1665	#ifdef __FreeBSD__
		1666	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
		1667	#endif
1520		1668
1521	return flags;	1669	return flags;
1522	}	1670	}
1523		1671
1524	unsigned int	1672	unsigned int
1525	ev_embeddable_backends (void)	1673	ev_embeddable_backends (void)
1526	{	1674	{
1527	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1675	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1528		1676
1529	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1677	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1530	/* please fix it and tell me how to detect the fix */	1678	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1531	flags &= ~EVBACKEND_EPOLL;	1679	flags &= ~EVBACKEND_EPOLL;
1532		1680
1533	return flags;	1681	return flags;
1534	}	1682	}
1535		1683
1536	unsigned int	1684	unsigned int
1537	ev_backend (EV_P)	1685	ev_backend (EV_P)
1538	{	1686	{
1539	return backend;	1687	return backend;
1540	}	1688	}
1541		1689
1542	#if EV_MINIMAL < 2	1690	#if EV_FEATURE_API
1543	unsigned int	1691	unsigned int
1544	ev_loop_count (EV_P)	1692	ev_iteration (EV_P)
1545	{	1693	{
1546	return loop_count;	1694	return loop_count;
1547	}	1695	}
1548		1696
1549	unsigned int	1697	unsigned int
1550	ev_loop_depth (EV_P)	1698	ev_depth (EV_P)
1551	{	1699	{
1552	return loop_depth;	1700	return loop_depth;
1553	}	1701	}
1554		1702
1555	void	1703	void
…		…
1592	static void noinline	1740	static void noinline
1593	loop_init (EV_P_ unsigned int flags)	1741	loop_init (EV_P_ unsigned int flags)
1594	{	1742	{
1595	if (!backend)	1743	if (!backend)
1596	{	1744	{
		1745	origflags = flags;
		1746
1597	#if EV_USE_REALTIME	1747	#if EV_USE_REALTIME
1598	if (!have_realtime)	1748	if (!have_realtime)
1599	{	1749	{
1600	struct timespec ts;	1750	struct timespec ts;
1601		1751
…		…
1623	if (!(flags & EVFLAG_NOENV)	1773	if (!(flags & EVFLAG_NOENV)
1624	&& !enable_secure ()	1774	&& !enable_secure ()
1625	&& getenv ("LIBEV_FLAGS"))	1775	&& getenv ("LIBEV_FLAGS"))
1626	flags = atoi (getenv ("LIBEV_FLAGS"));	1776	flags = atoi (getenv ("LIBEV_FLAGS"));
1627		1777
1628	ev_rt_now = ev_time ();	1778	ev_rt_now = ev_time ();
1629	mn_now = get_clock ();	1779	mn_now = get_clock ();
1630	now_floor = mn_now;	1780	now_floor = mn_now;
1631	rtmn_diff = ev_rt_now - mn_now;	1781	rtmn_diff = ev_rt_now - mn_now;
1632	#if EV_MINIMAL < 2	1782	#if EV_FEATURE_API
1633	invoke_cb = ev_invoke_pending;	1783	invoke_cb = ev_invoke_pending;
1634	#endif	1784	#endif
1635		1785
1636	io_blocktime = 0.;	1786	io_blocktime = 0.;
1637	timeout_blocktime = 0.;	1787	timeout_blocktime = 0.;
1638	backend = 0;	1788	backend = 0;
1639	backend_fd = -1;	1789	backend_fd = -1;
1640	sig_pending = 0;	1790	sig_pending = 0;
1641	#if EV_ASYNC_ENABLE	1791	#if EV_ASYNC_ENABLE
1642	async_pending = 0;	1792	async_pending = 0;
1643	#endif	1793	#endif
		1794	pipe_write_skipped = 0;
		1795	pipe_write_wanted = 0;
1644	#if EV_USE_INOTIFY	1796	#if EV_USE_INOTIFY
1645	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1797	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1646	#endif	1798	#endif
1647	#if EV_USE_SIGNALFD	1799	#if EV_USE_SIGNALFD
1648	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1800	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1649	#endif	1801	#endif
1650		1802
1651	if (!(flags & 0x0000ffffU))	1803	if (!(flags & EVBACKEND_MASK))
1652	flags \|= ev_recommended_backends ();	1804	flags \|= ev_recommended_backends ();
1653		1805
		1806	#if EV_USE_IOCP
		1807	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1808	#endif
1654	#if EV_USE_PORT	1809	#if EV_USE_PORT
1655	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1810	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1656	#endif	1811	#endif
1657	#if EV_USE_KQUEUE	1812	#if EV_USE_KQUEUE
1658	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1813	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1675	#endif	1830	#endif
1676	}	1831	}
1677	}	1832	}
1678		1833
1679	/* free up a loop structure */	1834	/* free up a loop structure */
1680	static void noinline	1835	void
1681	loop_destroy (EV_P)	1836	ev_loop_destroy (EV_P)
1682	{	1837	{
1683	int i;	1838	int i;
		1839
		1840	#if EV_MULTIPLICITY
		1841	/* mimic free (0) */
		1842	if (!EV_A)
		1843	return;
		1844	#endif
		1845
		1846	#if EV_CLEANUP_ENABLE
		1847	/* queue cleanup watchers (and execute them) */
		1848	if (expect_false (cleanupcnt))
		1849	{
		1850	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1851	EV_INVOKE_PENDING;
		1852	}
		1853	#endif
		1854
		1855	#if EV_CHILD_ENABLE
		1856	if (ev_is_active (&childev))
		1857	{
		1858	ev_ref (EV_A); /* child watcher */
		1859	ev_signal_stop (EV_A_ &childev);
		1860	}
		1861	#endif
1684		1862
1685	if (ev_is_active (&pipe_w))	1863	if (ev_is_active (&pipe_w))
1686	{	1864	{
1687	/ev_ref (EV_A);/	1865	/ev_ref (EV_A);/
1688	/ev_io_stop (EV_A_ &pipe_w);/	1866	/ev_io_stop (EV_A_ &pipe_w);/
…		…
1710	#endif	1888	#endif
1711		1889
1712	if (backend_fd >= 0)	1890	if (backend_fd >= 0)
1713	close (backend_fd);	1891	close (backend_fd);
1714		1892
		1893	#if EV_USE_IOCP
		1894	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1895	#endif
1715	#if EV_USE_PORT	1896	#if EV_USE_PORT
1716	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1897	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1717	#endif	1898	#endif
1718	#if EV_USE_KQUEUE	1899	#if EV_USE_KQUEUE
1719	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1900	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1746	array_free (periodic, EMPTY);	1927	array_free (periodic, EMPTY);
1747	#endif	1928	#endif
1748	#if EV_FORK_ENABLE	1929	#if EV_FORK_ENABLE
1749	array_free (fork, EMPTY);	1930	array_free (fork, EMPTY);
1750	#endif	1931	#endif
		1932	#if EV_CLEANUP_ENABLE
		1933	array_free (cleanup, EMPTY);
		1934	#endif
1751	array_free (prepare, EMPTY);	1935	array_free (prepare, EMPTY);
1752	array_free (check, EMPTY);	1936	array_free (check, EMPTY);
1753	#if EV_ASYNC_ENABLE	1937	#if EV_ASYNC_ENABLE
1754	array_free (async, EMPTY);	1938	array_free (async, EMPTY);
1755	#endif	1939	#endif
1756		1940
1757	backend = 0;	1941	backend = 0;
		1942
		1943	#if EV_MULTIPLICITY
		1944	if (ev_is_default_loop (EV_A))
		1945	#endif
		1946	ev_default_loop_ptr = 0;
		1947	#if EV_MULTIPLICITY
		1948	else
		1949	ev_free (EV_A);
		1950	#endif
1758	}	1951	}
1759		1952
1760	#if EV_USE_INOTIFY	1953	#if EV_USE_INOTIFY
1761	inline_size void infy_fork (EV_P);	1954	inline_size void infy_fork (EV_P);
1762	#endif	1955	#endif
…		…
1777	infy_fork (EV_A);	1970	infy_fork (EV_A);
1778	#endif	1971	#endif
1779		1972
1780	if (ev_is_active (&pipe_w))	1973	if (ev_is_active (&pipe_w))
1781	{	1974	{
1782	/* this "locks" the handlers against writing to the pipe */	1975	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1783	/* while we modify the fd vars */
1784	sig_pending = 1;
1785	#if EV_ASYNC_ENABLE
1786	async_pending = 1;
1787	#endif
1788		1976
1789	ev_ref (EV_A);	1977	ev_ref (EV_A);
1790	ev_io_stop (EV_A_ &pipe_w);	1978	ev_io_stop (EV_A_ &pipe_w);
1791		1979
1792	#if EV_USE_EVENTFD	1980	#if EV_USE_EVENTFD
…		…
1821	loop_init (EV_A_ flags);	2009	loop_init (EV_A_ flags);
1822		2010
1823	if (ev_backend (EV_A))	2011	if (ev_backend (EV_A))
1824	return EV_A;	2012	return EV_A;
1825		2013
		2014	ev_free (EV_A);
1826	return 0;	2015	return 0;
1827	}	2016	}
1828		2017
1829	void
1830	ev_loop_destroy (EV_P)
1831	{
1832	loop_destroy (EV_A);
1833	ev_free (loop);
1834	}
1835
1836	void
1837	ev_loop_fork (EV_P)
1838	{
1839	postfork = 1; /* must be in line with ev_default_fork */
1840	}
1841	#endif /* multiplicity */	2018	#endif /* multiplicity */
1842		2019
1843	#if EV_VERIFY	2020	#if EV_VERIFY
1844	static void noinline	2021	static void noinline
1845	verify_watcher (EV_P_ W w)	2022	verify_watcher (EV_P_ W w)
…		…
1874	verify_watcher (EV_A_ ws [cnt]);	2051	verify_watcher (EV_A_ ws [cnt]);
1875	}	2052	}
1876	}	2053	}
1877	#endif	2054	#endif
1878		2055
1879	#if EV_MINIMAL < 2	2056	#if EV_FEATURE_API
1880	void	2057	void
1881	ev_loop_verify (EV_P)	2058	ev_verify (EV_P)
1882	{	2059	{
1883	#if EV_VERIFY	2060	#if EV_VERIFY
1884	int i;	2061	int i;
1885	WL w;	2062	WL w;
1886		2063
…		…
1920	#if EV_FORK_ENABLE	2097	#if EV_FORK_ENABLE
1921	assert (forkmax >= forkcnt);	2098	assert (forkmax >= forkcnt);
1922	array_verify (EV_A_ (W *)forks, forkcnt);	2099	array_verify (EV_A_ (W *)forks, forkcnt);
1923	#endif	2100	#endif
1924		2101
		2102	#if EV_CLEANUP_ENABLE
		2103	assert (cleanupmax >= cleanupcnt);
		2104	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2105	#endif
		2106
1925	#if EV_ASYNC_ENABLE	2107	#if EV_ASYNC_ENABLE
1926	assert (asyncmax >= asynccnt);	2108	assert (asyncmax >= asynccnt);
1927	array_verify (EV_A_ (W *)asyncs, asynccnt);	2109	array_verify (EV_A_ (W *)asyncs, asynccnt);
1928	#endif	2110	#endif
1929		2111
…		…
1937	array_verify (EV_A_ (W *)checks, checkcnt);	2119	array_verify (EV_A_ (W *)checks, checkcnt);
1938	#endif	2120	#endif
1939		2121
1940	# if 0	2122	# if 0
1941	#if EV_CHILD_ENABLE	2123	#if EV_CHILD_ENABLE
1942	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	2124	for (w = (ev_child )childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child )((WL)w)->next)
1943	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)	2125	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1944	#endif	2126	#endif
1945	# endif	2127	# endif
1946	#endif	2128	#endif
1947	}	2129	}
1948	#endif	2130	#endif
1949		2131
1950	#if EV_MULTIPLICITY	2132	#if EV_MULTIPLICITY
1951	struct ev_loop *	2133	struct ev_loop *
1952	ev_default_loop_init (unsigned int flags)
1953	#else	2134	#else
1954	int	2135	int
		2136	#endif
1955	ev_default_loop (unsigned int flags)	2137	ev_default_loop (unsigned int flags)
1956	#endif
1957	{	2138	{
1958	if (!ev_default_loop_ptr)	2139	if (!ev_default_loop_ptr)
1959	{	2140	{
1960	#if EV_MULTIPLICITY	2141	#if EV_MULTIPLICITY
1961	EV_P = ev_default_loop_ptr = &default_loop_struct;	2142	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1980		2161
1981	return ev_default_loop_ptr;	2162	return ev_default_loop_ptr;
1982	}	2163	}
1983		2164
1984	void	2165	void
1985	ev_default_destroy (void)	2166	ev_loop_fork (EV_P)
1986	{	2167	{
1987	#if EV_MULTIPLICITY
1988	EV_P = ev_default_loop_ptr;
1989	#endif
1990
1991	ev_default_loop_ptr = 0;
1992
1993	#if EV_CHILD_ENABLE
1994	ev_ref (EV_A); /* child watcher */
1995	ev_signal_stop (EV_A_ &childev);
1996	#endif
1997
1998	loop_destroy (EV_A);
1999	}
2000
2001	void
2002	ev_default_fork (void)
2003	{
2004	#if EV_MULTIPLICITY
2005	EV_P = ev_default_loop_ptr;
2006	#endif
2007
2008	postfork = 1; /* must be in line with ev_loop_fork */	2168	postfork = 1; /* must be in line with ev_default_fork */
2009	}	2169	}
2010		2170
2011	/*****************************************************************************/	2171	/*****************************************************************************/
2012		2172
2013	void	2173	void
…		…
2035		2195
2036	for (pri = NUMPRI; pri--; )	2196	for (pri = NUMPRI; pri--; )
2037	while (pendingcnt [pri])	2197	while (pendingcnt [pri])
2038	{	2198	{
2039	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2199	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2040
2041	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2042	/* ^ this is no longer true, as pending_w could be here */
2043		2200
2044	p->w->pending = 0;	2201	p->w->pending = 0;
2045	EV_CB_INVOKE (p->w, p->events);	2202	EV_CB_INVOKE (p->w, p->events);
2046	EV_FREQUENT_CHECK;	2203	EV_FREQUENT_CHECK;
2047	}	2204	}
…		…
2104	EV_FREQUENT_CHECK;	2261	EV_FREQUENT_CHECK;
2105	feed_reverse (EV_A_ (W)w);	2262	feed_reverse (EV_A_ (W)w);
2106	}	2263	}
2107	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);	2264	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2108		2265
2109	feed_reverse_done (EV_A_ EV_TIMEOUT);	2266	feed_reverse_done (EV_A_ EV_TIMER);
2110	}	2267	}
2111	}	2268	}
2112		2269
2113	#if EV_PERIODIC_ENABLE	2270	#if EV_PERIODIC_ENABLE
		2271
		2272	static void noinline
		2273	periodic_recalc (EV_P_ ev_periodic *w)
		2274	{
		2275	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2276	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2277
		2278	/* the above almost always errs on the low side */
		2279	while (at <= ev_rt_now)
		2280	{
		2281	ev_tstamp nat = at + w->interval;
		2282
		2283	/* when resolution fails us, we use ev_rt_now */
		2284	if (expect_false (nat == at))
		2285	{
		2286	at = ev_rt_now;
		2287	break;
		2288	}
		2289
		2290	at = nat;
		2291	}
		2292
		2293	ev_at (w) = at;
		2294	}
		2295
2114	/* make periodics pending */	2296	/* make periodics pending */
2115	inline_size void	2297	inline_size void
2116	periodics_reify (EV_P)	2298	periodics_reify (EV_P)
2117	{	2299	{
2118	EV_FREQUENT_CHECK;	2300	EV_FREQUENT_CHECK;
…		…
2137	ANHE_at_cache (periodics [HEAP0]);	2319	ANHE_at_cache (periodics [HEAP0]);
2138	downheap (periodics, periodiccnt, HEAP0);	2320	downheap (periodics, periodiccnt, HEAP0);
2139	}	2321	}
2140	else if (w->interval)	2322	else if (w->interval)
2141	{	2323	{
2142	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2324	periodic_recalc (EV_A_ w);
2143	/* if next trigger time is not sufficiently in the future, put it there */
2144	/* this might happen because of floating point inexactness */
2145	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2146	{
2147	ev_at (w) += w->interval;
2148
2149	/* if interval is unreasonably low we might still have a time in the past */
2150	/* so correct this. this will make the periodic very inexact, but the user */
2151	/* has effectively asked to get triggered more often than possible */
2152	if (ev_at (w) < ev_rt_now)
2153	ev_at (w) = ev_rt_now;
2154	}
2155
2156	ANHE_at_cache (periodics [HEAP0]);	2325	ANHE_at_cache (periodics [HEAP0]);
2157	downheap (periodics, periodiccnt, HEAP0);	2326	downheap (periodics, periodiccnt, HEAP0);
2158	}	2327	}
2159	else	2328	else
2160	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2329	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2167	feed_reverse_done (EV_A_ EV_PERIODIC);	2336	feed_reverse_done (EV_A_ EV_PERIODIC);
2168	}	2337	}
2169	}	2338	}
2170		2339
2171	/* simply recalculate all periodics */	2340	/* simply recalculate all periodics */
2172	/* TODO: maybe ensure that at leats one event happens when jumping forward? */	2341	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2173	static void noinline	2342	static void noinline
2174	periodics_reschedule (EV_P)	2343	periodics_reschedule (EV_P)
2175	{	2344	{
2176	int i;	2345	int i;
2177		2346
…		…
2181	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2350	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2182		2351
2183	if (w->reschedule_cb)	2352	if (w->reschedule_cb)
2184	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2353	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2185	else if (w->interval)	2354	else if (w->interval)
2186	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2355	periodic_recalc (EV_A_ w);
2187		2356
2188	ANHE_at_cache (periodics [i]);	2357	ANHE_at_cache (periodics [i]);
2189	}	2358	}
2190		2359
2191	reheap (periodics, periodiccnt);	2360	reheap (periodics, periodiccnt);
…		…
2238	* doesn't hurt either as we only do this on time-jumps or	2407	* doesn't hurt either as we only do this on time-jumps or
2239	* in the unlikely event of having been preempted here.	2408	* in the unlikely event of having been preempted here.
2240	*/	2409	*/
2241	for (i = 4; --i; )	2410	for (i = 4; --i; )
2242	{	2411	{
		2412	ev_tstamp diff;
2243	rtmn_diff = ev_rt_now - mn_now;	2413	rtmn_diff = ev_rt_now - mn_now;
2244		2414
		2415	diff = odiff - rtmn_diff;
		2416
2245	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2417	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2246	return; /* all is well */	2418	return; /* all is well */
2247		2419
2248	ev_rt_now = ev_time ();	2420	ev_rt_now = ev_time ();
2249	mn_now = get_clock ();	2421	mn_now = get_clock ();
2250	now_floor = mn_now;	2422	now_floor = mn_now;
…		…
2273	mn_now = ev_rt_now;	2445	mn_now = ev_rt_now;
2274	}	2446	}
2275	}	2447	}
2276		2448
2277	void	2449	void
2278	ev_loop (EV_P_ int flags)	2450	ev_run (EV_P_ int flags)
2279	{	2451	{
2280	#if EV_MINIMAL < 2	2452	#if EV_FEATURE_API
2281	++loop_depth;	2453	++loop_depth;
2282	#endif	2454	#endif
2283		2455
2284	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2456	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2285		2457
2286	loop_done = EVUNLOOP_CANCEL;	2458	loop_done = EVBREAK_CANCEL;
2287		2459
2288	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2460	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2289		2461
2290	do	2462	do
2291	{	2463	{
2292	#if EV_VERIFY >= 2	2464	#if EV_VERIFY >= 2
2293	ev_loop_verify (EV_A);	2465	ev_verify (EV_A);
2294	#endif	2466	#endif
2295		2467
2296	#ifndef _WIN32	2468	#ifndef _WIN32
2297	if (expect_false (curpid)) /* penalise the forking check even more */	2469	if (expect_false (curpid)) /* penalise the forking check even more */
2298	if (expect_false (getpid () != curpid))	2470	if (expect_false (getpid () != curpid))
…		…
2334	/* calculate blocking time */	2506	/* calculate blocking time */
2335	{	2507	{
2336	ev_tstamp waittime = 0.;	2508	ev_tstamp waittime = 0.;
2337	ev_tstamp sleeptime = 0.;	2509	ev_tstamp sleeptime = 0.;
2338		2510
		2511	/* remember old timestamp for io_blocktime calculation */
		2512	ev_tstamp prev_mn_now = mn_now;
		2513
		2514	/* update time to cancel out callback processing overhead */
		2515	time_update (EV_A_ 1e100);
		2516
		2517	/* from now on, we want a pipe-wake-up */
		2518	pipe_write_wanted = 1;
		2519
2339	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))	2520	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2340	{	2521	{
2341	/* remember old timestamp for io_blocktime calculation */
2342	ev_tstamp prev_mn_now = mn_now;
2343
2344	/* update time to cancel out callback processing overhead */
2345	time_update (EV_A_ 1e100);
2346
2347	waittime = MAX_BLOCKTIME;	2522	waittime = MAX_BLOCKTIME;
2348		2523
2349	if (timercnt)	2524	if (timercnt)
2350	{	2525	{
2351	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2526	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2352	if (waittime > to) waittime = to;	2527	if (waittime > to) waittime = to;
2353	}	2528	}
2354		2529
2355	#if EV_PERIODIC_ENABLE	2530	#if EV_PERIODIC_ENABLE
2356	if (periodiccnt)	2531	if (periodiccnt)
2357	{	2532	{
2358	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2533	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2359	if (waittime > to) waittime = to;	2534	if (waittime > to) waittime = to;
2360	}	2535	}
2361	#endif	2536	#endif
2362		2537
2363	/* don't let timeouts decrease the waittime below timeout_blocktime */	2538	/* don't let timeouts decrease the waittime below timeout_blocktime */
2364	if (expect_false (waittime < timeout_blocktime))	2539	if (expect_false (waittime < timeout_blocktime))
2365	waittime = timeout_blocktime;	2540	waittime = timeout_blocktime;
		2541
		2542	/* at this point, we NEED to wait, so we have to ensure */
		2543	/* to pass a minimum nonzero value to the backend */
		2544	if (expect_false (waittime < backend_mintime))
		2545	waittime = backend_mintime;
2366		2546
2367	/* extra check because io_blocktime is commonly 0 */	2547	/* extra check because io_blocktime is commonly 0 */
2368	if (expect_false (io_blocktime))	2548	if (expect_false (io_blocktime))
2369	{	2549	{
2370	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2550	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2371		2551
2372	if (sleeptime > waittime - backend_fudge)	2552	if (sleeptime > waittime - backend_mintime)
2373	sleeptime = waittime - backend_fudge;	2553	sleeptime = waittime - backend_mintime;
2374		2554
2375	if (expect_true (sleeptime > 0.))	2555	if (expect_true (sleeptime > 0.))
2376	{	2556	{
2377	ev_sleep (sleeptime);	2557	ev_sleep (sleeptime);
2378	waittime -= sleeptime;	2558	waittime -= sleeptime;
2379	}	2559	}
2380	}	2560	}
2381	}	2561	}
2382		2562
2383	#if EV_MINIMAL < 2	2563	#if EV_FEATURE_API
2384	++loop_count;	2564	++loop_count;
2385	#endif	2565	#endif
2386	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2566	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2387	backend_poll (EV_A_ waittime);	2567	backend_poll (EV_A_ waittime);
2388	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */	2568	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2569
		2570	pipe_write_wanted = 0;
		2571
		2572	if (pipe_write_skipped)
		2573	{
		2574	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2575	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2576	}
		2577
2389		2578
2390	/* update ev_rt_now, do magic */	2579	/* update ev_rt_now, do magic */
2391	time_update (EV_A_ waittime + sleeptime);	2580	time_update (EV_A_ waittime + sleeptime);
2392	}	2581	}
2393		2582
…		…
2411	EV_INVOKE_PENDING;	2600	EV_INVOKE_PENDING;
2412	}	2601	}
2413	while (expect_true (	2602	while (expect_true (
2414	activecnt	2603	activecnt
2415	&& !loop_done	2604	&& !loop_done
2416	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))	2605	&& !(flags & (EVRUN_ONCE \| EVRUN_NOWAIT))
2417	));	2606	));
2418		2607
2419	if (loop_done == EVUNLOOP_ONE)	2608	if (loop_done == EVBREAK_ONE)
2420	loop_done = EVUNLOOP_CANCEL;	2609	loop_done = EVBREAK_CANCEL;
2421		2610
2422	#if EV_MINIMAL < 2	2611	#if EV_FEATURE_API
2423	--loop_depth;	2612	--loop_depth;
2424	#endif	2613	#endif
2425	}	2614	}
2426		2615
2427	void	2616	void
2428	ev_unloop (EV_P_ int how)	2617	ev_break (EV_P_ int how)
2429	{	2618	{
2430	loop_done = how;	2619	loop_done = how;
2431	}	2620	}
2432		2621
2433	void	2622	void
…		…
2581	EV_FREQUENT_CHECK;	2770	EV_FREQUENT_CHECK;
2582		2771
2583	wlist_del (&anfds[w->fd].head, (WL)w);	2772	wlist_del (&anfds[w->fd].head, (WL)w);
2584	ev_stop (EV_A_ (W)w);	2773	ev_stop (EV_A_ (W)w);
2585		2774
2586	fd_change (EV_A_ w->fd, 1);	2775	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2587		2776
2588	EV_FREQUENT_CHECK;	2777	EV_FREQUENT_CHECK;
2589	}	2778	}
2590		2779
2591	void noinline	2780	void noinline
…		…
2683	if (w->reschedule_cb)	2872	if (w->reschedule_cb)
2684	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2873	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2685	else if (w->interval)	2874	else if (w->interval)
2686	{	2875	{
2687	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2876	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2688	/* this formula differs from the one in periodic_reify because we do not always round up */	2877	periodic_recalc (EV_A_ w);
2689	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2690	}	2878	}
2691	else	2879	else
2692	ev_at (w) = w->offset;	2880	ev_at (w) = w->offset;
2693		2881
2694	EV_FREQUENT_CHECK;	2882	EV_FREQUENT_CHECK;
…		…
2815	sa.sa_handler = ev_sighandler;	3003	sa.sa_handler = ev_sighandler;
2816	sigfillset (&sa.sa_mask);	3004	sigfillset (&sa.sa_mask);
2817	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3005	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2818	sigaction (w->signum, &sa, 0);	3006	sigaction (w->signum, &sa, 0);
2819		3007
		3008	if (origflags & EVFLAG_NOSIGMASK)
		3009	{
2820	sigemptyset (&sa.sa_mask);	3010	sigemptyset (&sa.sa_mask);
2821	sigaddset (&sa.sa_mask, w->signum);	3011	sigaddset (&sa.sa_mask, w->signum);
2822	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3012	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3013	}
2823	#endif	3014	#endif
2824	}	3015	}
2825		3016
2826	EV_FREQUENT_CHECK;	3017	EV_FREQUENT_CHECK;
2827	}	3018	}
…		…
2877	return;	3068	return;
2878		3069
2879	EV_FREQUENT_CHECK;	3070	EV_FREQUENT_CHECK;
2880		3071
2881	ev_start (EV_A_ (W)w, 1);	3072	ev_start (EV_A_ (W)w, 1);
2882	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	3073	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2883		3074
2884	EV_FREQUENT_CHECK;	3075	EV_FREQUENT_CHECK;
2885	}	3076	}
2886		3077
2887	void	3078	void
…		…
2891	if (expect_false (!ev_is_active (w)))	3082	if (expect_false (!ev_is_active (w)))
2892	return;	3083	return;
2893		3084
2894	EV_FREQUENT_CHECK;	3085	EV_FREQUENT_CHECK;
2895		3086
2896	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	3087	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2897	ev_stop (EV_A_ (W)w);	3088	ev_stop (EV_A_ (W)w);
2898		3089
2899	EV_FREQUENT_CHECK;	3090	EV_FREQUENT_CHECK;
2900	}	3091	}
2901		3092
…		…
2968	if (!pend \|\| pend == path)	3159	if (!pend \|\| pend == path)
2969	break;	3160	break;
2970		3161
2971	*pend = 0;	3162	*pend = 0;
2972	w->wd = inotify_add_watch (fs_fd, path, mask);	3163	w->wd = inotify_add_watch (fs_fd, path, mask);
2973	}	3164	}
2974	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3165	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2975	}	3166	}
2976	}	3167	}
2977		3168
2978	if (w->wd >= 0)	3169	if (w->wd >= 0)
2979	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	3170	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2980		3171
2981	/* now re-arm timer, if required */	3172	/* now re-arm timer, if required */
2982	if (ev_is_active (&w->timer)) ev_ref (EV_A);	3173	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2983	ev_timer_again (EV_A_ &w->timer);	3174	ev_timer_again (EV_A_ &w->timer);
2984	if (ev_is_active (&w->timer)) ev_unref (EV_A);	3175	if (ev_is_active (&w->timer)) ev_unref (EV_A);
…		…
2992		3183
2993	if (wd < 0)	3184	if (wd < 0)
2994	return;	3185	return;
2995		3186
2996	w->wd = -2;	3187	w->wd = -2;
2997	slot = wd & (EV_INOTIFY_HASHSIZE - 1);	3188	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2998	wlist_del (&fs_hash [slot].head, (WL)w);	3189	wlist_del (&fs_hash [slot].head, (WL)w);
2999		3190
3000	/* remove this watcher, if others are watching it, they will rearm */	3191	/* remove this watcher, if others are watching it, they will rearm */
3001	inotify_rm_watch (fs_fd, wd);	3192	inotify_rm_watch (fs_fd, wd);
3002	}	3193	}
…		…
3004	static void noinline	3195	static void noinline
3005	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	3196	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3006	{	3197	{
3007	if (slot < 0)	3198	if (slot < 0)
3008	/* overflow, need to check for all hash slots */	3199	/* overflow, need to check for all hash slots */
3009	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3200	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3010	infy_wd (EV_A_ slot, wd, ev);	3201	infy_wd (EV_A_ slot, wd, ev);
3011	else	3202	else
3012	{	3203	{
3013	WL w_;	3204	WL w_;
3014		3205
3015	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )	3206	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3016	{	3207	{
3017	ev_stat w = (ev_stat )w_;	3208	ev_stat w = (ev_stat )w_;
3018	w_ = w_->next; /* lets us remove this watcher and all before it */	3209	w_ = w_->next; /* lets us remove this watcher and all before it */
3019		3210
3020	if (w->wd == wd \|\| wd == -1)	3211	if (w->wd == wd \|\| wd == -1)
3021	{	3212	{
3022	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))	3213	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
3023	{	3214	{
3024	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	3215	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3025	w->wd = -1;	3216	w->wd = -1;
3026	infy_add (EV_A_ w); /* re-add, no matter what */	3217	infy_add (EV_A_ w); /* re-add, no matter what */
3027	}	3218	}
3028		3219
3029	stat_timer_cb (EV_A_ &w->timer, 0);	3220	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
3043	{	3234	{
3044	struct inotify_event ev = (struct inotify_event )(buf + ofs);	3235	struct inotify_event ev = (struct inotify_event )(buf + ofs);
3045	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3236	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3046	ofs += sizeof (struct inotify_event) + ev->len;	3237	ofs += sizeof (struct inotify_event) + ev->len;
3047	}	3238	}
3048	}
3049
3050	inline_size unsigned int
3051	ev_linux_version (void)
3052	{
3053	struct utsname buf;
3054	unsigned int v;
3055	int i;
3056	char *p = buf.release;
3057
3058	if (uname (&buf))
3059	return 0;
3060
3061	for (i = 3+1; --i; )
3062	{
3063	unsigned int c = 0;
3064
3065	for (;;)
3066	{
3067	if (p >= '0' && p <= '9')
3068	c = c * 10 + *p++ - '0';
3069	else
3070	{
3071	p += *p == '.';
3072	break;
3073	}
3074	}
3075
3076	v = (v << 8) \| c;
3077	}
3078
3079	return v;
3080	}	3239	}
3081		3240
3082	inline_size void	3241	inline_size void
3083	ev_check_2625 (EV_P)	3242	ev_check_2625 (EV_P)
3084	{	3243	{
…		…
3143	ev_io_set (&fs_w, fs_fd, EV_READ);	3302	ev_io_set (&fs_w, fs_fd, EV_READ);
3144	ev_io_start (EV_A_ &fs_w);	3303	ev_io_start (EV_A_ &fs_w);
3145	ev_unref (EV_A);	3304	ev_unref (EV_A);
3146	}	3305	}
3147		3306
3148	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3307	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3149	{	3308	{
3150	WL w_ = fs_hash [slot].head;	3309	WL w_ = fs_hash [slot].head;
3151	fs_hash [slot].head = 0;	3310	fs_hash [slot].head = 0;
3152		3311
3153	while (w_)	3312	while (w_)
…		…
3408		3567
3409	#if EV_EMBED_ENABLE	3568	#if EV_EMBED_ENABLE
3410	void noinline	3569	void noinline
3411	ev_embed_sweep (EV_P_ ev_embed *w)	3570	ev_embed_sweep (EV_P_ ev_embed *w)
3412	{	3571	{
3413	ev_loop (w->other, EVLOOP_NONBLOCK);	3572	ev_run (w->other, EVRUN_NOWAIT);
3414	}	3573	}
3415		3574
3416	static void	3575	static void
3417	embed_io_cb (EV_P_ ev_io *io, int revents)	3576	embed_io_cb (EV_P_ ev_io *io, int revents)
3418	{	3577	{
3419	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	3578	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
3420		3579
3421	if (ev_cb (w))	3580	if (ev_cb (w))
3422	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3581	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3423	else	3582	else
3424	ev_loop (w->other, EVLOOP_NONBLOCK);	3583	ev_run (w->other, EVRUN_NOWAIT);
3425	}	3584	}
3426		3585
3427	static void	3586	static void
3428	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3587	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3429	{	3588	{
…		…
3433	EV_P = w->other;	3592	EV_P = w->other;
3434		3593
3435	while (fdchangecnt)	3594	while (fdchangecnt)
3436	{	3595	{
3437	fd_reify (EV_A);	3596	fd_reify (EV_A);
3438	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3597	ev_run (EV_A_ EVRUN_NOWAIT);
3439	}	3598	}
3440	}	3599	}
3441	}	3600	}
3442		3601
3443	static void	3602	static void
…		…
3449		3608
3450	{	3609	{
3451	EV_P = w->other;	3610	EV_P = w->other;
3452		3611
3453	ev_loop_fork (EV_A);	3612	ev_loop_fork (EV_A);
3454	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3613	ev_run (EV_A_ EVRUN_NOWAIT);
3455	}	3614	}
3456		3615
3457	ev_embed_start (EV_A_ w);	3616	ev_embed_start (EV_A_ w);
3458	}	3617	}
3459		3618
…		…
3551		3710
3552	EV_FREQUENT_CHECK;	3711	EV_FREQUENT_CHECK;
3553	}	3712	}
3554	#endif	3713	#endif
3555		3714
3556	#if EV_ASYNC_ENABLE	3715	#if EV_CLEANUP_ENABLE
3557	void	3716	void
3558	ev_async_start (EV_P_ ev_async *w)	3717	ev_cleanup_start (EV_P_ ev_cleanup *w)
3559	{	3718	{
3560	if (expect_false (ev_is_active (w)))	3719	if (expect_false (ev_is_active (w)))
3561	return;	3720	return;
		3721
		3722	EV_FREQUENT_CHECK;
		3723
		3724	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3725	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3726	cleanups [cleanupcnt - 1] = w;
		3727
		3728	/* cleanup watchers should never keep a refcount on the loop */
		3729	ev_unref (EV_A);
		3730	EV_FREQUENT_CHECK;
		3731	}
		3732
		3733	void
		3734	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3735	{
		3736	clear_pending (EV_A_ (W)w);
		3737	if (expect_false (!ev_is_active (w)))
		3738	return;
		3739
		3740	EV_FREQUENT_CHECK;
		3741	ev_ref (EV_A);
		3742
		3743	{
		3744	int active = ev_active (w);
		3745
		3746	cleanups [active - 1] = cleanups [--cleanupcnt];
		3747	ev_active (cleanups [active - 1]) = active;
		3748	}
		3749
		3750	ev_stop (EV_A_ (W)w);
		3751
		3752	EV_FREQUENT_CHECK;
		3753	}
		3754	#endif
		3755
		3756	#if EV_ASYNC_ENABLE
		3757	void
		3758	ev_async_start (EV_P_ ev_async *w)
		3759	{
		3760	if (expect_false (ev_is_active (w)))
		3761	return;
		3762
		3763	w->sent = 0;
3562		3764
3563	evpipe_init (EV_A);	3765	evpipe_init (EV_A);
3564		3766
3565	EV_FREQUENT_CHECK;	3767	EV_FREQUENT_CHECK;
3566		3768
…		…
3644	{	3846	{
3645	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));	3847	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
3646		3848
3647	if (expect_false (!once))	3849	if (expect_false (!once))
3648	{	3850	{
3649	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	3851	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMER, arg);
3650	return;	3852	return;
3651	}	3853	}
3652		3854
3653	once->cb = cb;	3855	once->cb = cb;
3654	once->arg = arg;	3856	once->arg = arg;
…		…
3769	}	3971	}
3770	#endif	3972	#endif
3771		3973
3772	#if EV_CHILD_ENABLE	3974	#if EV_CHILD_ENABLE
3773	if (types & EV_CHILD)	3975	if (types & EV_CHILD)
3774	for (i = EV_PID_HASHSIZE; i--; )	3976	for (i = (EV_PID_HASHSIZE); i--; )
3775	for (wl = childs [i]; wl; )	3977	for (wl = childs [i]; wl; )
3776	{	3978	{
3777	wn = wl->next;	3979	wn = wl->next;
3778	cb (EV_A_ EV_CHILD, wl);	3980	cb (EV_A_ EV_CHILD, wl);
3779	wl = wn;	3981	wl = wn;
…		…
3786		3988
3787	#if EV_MULTIPLICITY	3989	#if EV_MULTIPLICITY
3788	#include "ev_wrap.h"	3990	#include "ev_wrap.h"
3789	#endif	3991	#endif
3790		3992
3791	#ifdef __cplusplus	3993	EV_CPP(})
3792	}
3793	#endif
3794		3994

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Comparing libev/ev.c (file contents): Revision 1.337 by root, Wed Mar 10 09:18:24 2010 UTC vs. Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.337 by root, Wed Mar 10 09:18:24 2010 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC