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Comparing libev/ev.c (file contents):
Revision 1.340 by root, Tue Mar 16 20:39:29 2010 UTC vs.
Revision 1.383 by root, Wed Jul 20 00:40:14 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 EV_FEATURE_OS	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
92	# define EV_USE_SELECT EV_FEATURE_BACKENDS	104	# define EV_USE_POLL EV_FEATURE_BACKENDS
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 EV_FEATURE_BACKENDS
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
		112	# ifndef EV_USE_EPOLL
108	# define EV_USE_EPOLL EV_FEATURE_BACKENDS	113	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
109	# else
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
		121	# ifndef EV_USE_KQUEUE
116	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS	122	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117	# else
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
		130	# ifndef EV_USE_PORT
124	# define EV_USE_PORT EV_FEATURE_BACKENDS	131	# define EV_USE_PORT EV_FEATURE_BACKENDS
125	# else
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
		139	# ifndef EV_USE_INOTIFY
132	# define EV_USE_INOTIFY EV_FEATURE_OS	140	# define EV_USE_INOTIFY EV_FEATURE_OS
133	# else
134	# define EV_USE_INOTIFY 0
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
		148	# ifndef EV_USE_SIGNALFD
140	# define EV_USE_SIGNALFD EV_FEATURE_OS	149	# define EV_USE_SIGNALFD EV_FEATURE_OS
141	# else
142	# define EV_USE_SIGNALFD 0
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 EV_FEATURE_OS	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 EV_FEATURE_OS	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
…		…
361	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
362	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
363	#endif	387	#endif
364		388
365	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
366	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
367	# include <sys/select.h>	392	# include <sys/select.h>
368	# endif	393	# endif
369	#endif	394	#endif
370		395
371	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
372	# include <sys/utsname.h>
373	# include <sys/statfs.h>	397	# include <sys/statfs.h>
374	# include <sys/inotify.h>	398	# include <sys/inotify.h>
375	/* 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 */
376	# ifndef IN_DONT_FOLLOW	400	# ifndef IN_DONT_FOLLOW
377	# undef EV_USE_INOTIFY	401	# undef EV_USE_INOTIFY
…		…
394	# define EFD_CLOEXEC O_CLOEXEC	418	# define EFD_CLOEXEC O_CLOEXEC
395	# else	419	# else
396	# define EFD_CLOEXEC 02000000	420	# define EFD_CLOEXEC 02000000
397	# endif	421	# endif
398	# endif	422	# endif
399	# ifdef __cplusplus
400	extern "C" {
401	# endif
402	int (eventfd) (unsigned int initval, int flags);	423	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
403	# ifdef __cplusplus
404	}
405	# endif
406	#endif	424	#endif
407		425
408	#if EV_USE_SIGNALFD	426	#if EV_USE_SIGNALFD
409	/* 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 */
410	# include <stdint.h>	428	# include <stdint.h>
…		…
416	# define SFD_CLOEXEC O_CLOEXEC	434	# define SFD_CLOEXEC O_CLOEXEC
417	# else	435	# else
418	# define SFD_CLOEXEC 02000000	436	# define SFD_CLOEXEC 02000000
419	# endif	437	# endif
420	# endif	438	# endif
421	# ifdef __cplusplus
422	extern "C" {
423	# endif
424	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);
425		440
426	struct signalfd_siginfo	441	struct signalfd_siginfo
427	{	442	{
428	uint32_t ssi_signo;	443	uint32_t ssi_signo;
429	char pad[128 - sizeof (uint32_t)];	444	char pad[128 - sizeof (uint32_t)];
430	};	445	};
431	# ifdef __cplusplus
432	}
433	# endif	446	#endif
434	#endif
435
436		447
437	/**/	448	/**/
438		449
439	#if EV_VERIFY >= 3	450	#if EV_VERIFY >= 3
440	# define EV_FREQUENT_CHECK ev_verify (EV_A)	451	# define EV_FREQUENT_CHECK ev_verify (EV_A)
441	#else	452	#else
442	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
443	#endif	454	#endif
444		455
445	/*	456	/*
446	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
447	* It is added to ev_rt_now when scheduling periodics
448	* to ensure progress, time-wise, even when rounding
449	* errors are against us.
450	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
451	* Better solutions welcome.
452	*/	459	*/
453	#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 */
454		462
455	#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) */
456	#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) */
457		465
458	#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)
459	# 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)
460	# 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
461	#else	493	#else
462	# define expect(expr,value) (expr)	494	#define ecb_inline static
463	# define noinline
464	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
465	# define inline
466	# endif	495	#endif
		496
		497	#ifndef ECB_MEMORY_FENCE
		498	#if ECB_GCC_VERSION(2,5)
		499	#if __x86
		500	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		501	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		502	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
		503	#elif __amd64
		504	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		505	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		506	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
		507	#endif
467	#endif	508	#endif
		509	#endif
468		510
		511	#ifndef ECB_MEMORY_FENCE
		512	#if ECB_GCC_VERSION(4,4)
		513	#define ECB_MEMORY_FENCE __sync_synchronize ()
		514	#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
		515	#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
		516	#elif _MSC_VER >= 1400
		517	#define ECB_MEMORY_FENCE do { } while (0)
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#elif defined(_WIN32) && defined(MemoryBarrier)
		521	#define ECB_MEMORY_FENCE MemoryBarrier ()
		522	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		523	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		524	#endif
		525	#endif
		526
		527	#ifndef ECB_MEMORY_FENCE
		528	#include <pthread.h>
		529
		530	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		531	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		532	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		533	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		534	#endif
		535
		536	#if ECB_GCC_VERSION(3,1)
		537	#define ecb_attribute(attrlist) __attribute__(attrlist)
		538	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		539	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		540	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		541	#else
		542	#define ecb_attribute(attrlist)
		543	#define ecb_is_constant(expr) 0
		544	#define ecb_expect(expr,value) (expr)
		545	#define ecb_prefetch(addr,rw,locality)
		546	#endif
		547
		548	#define ecb_noinline ecb_attribute ((__noinline__))
		549	#define ecb_noreturn ecb_attribute ((__noreturn__))
		550	#define ecb_unused ecb_attribute ((__unused__))
		551	#define ecb_const ecb_attribute ((__const__))
		552	#define ecb_pure ecb_attribute ((__pure__))
		553
		554	#if ECB_GCC_VERSION(4,3)
		555	#define ecb_artificial ecb_attribute ((__artificial__))
		556	#define ecb_hot ecb_attribute ((__hot__))
		557	#define ecb_cold ecb_attribute ((__cold__))
		558	#else
		559	#define ecb_artificial
		560	#define ecb_hot
		561	#define ecb_cold
		562	#endif
		563
		564	/* put around conditional expressions if you are very sure that the */
		565	/* expression is mostly true or mostly false. note that these return */
		566	/* booleans, not the expression. */
469	#define expect_false(expr) expect ((expr) != 0, 0)	567	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470	#define expect_true(expr) expect ((expr) != 0, 1)	568	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		569	/* ecb.h end */
		570
		571	#define expect_false(cond) ecb_expect_false (cond)
		572	#define expect_true(cond) ecb_expect_true (cond)
		573	#define noinline ecb_noinline
		574
471	#define inline_size static inline	575	#define inline_size ecb_inline
472		576
473	#if EV_FEATURE_CODE	577	#if EV_FEATURE_CODE
474	# define inline_speed static inline	578	# define inline_speed ecb_inline
475	#else	579	#else
476	# define inline_speed static noinline	580	# define inline_speed static noinline
477	#endif	581	#endif
478		582
479	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	583	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
494	#define ev_active(w) ((W)(w))->active	598	#define ev_active(w) ((W)(w))->active
495	#define ev_at(w) ((WT)(w))->at	599	#define ev_at(w) ((WT)(w))->at
496		600
497	#if EV_USE_REALTIME	601	#if EV_USE_REALTIME
498	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	602	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
499	/* giving it a reasonably high chance of working on typical architetcures */	603	/* giving it a reasonably high chance of working on typical architectures */
500	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */	604	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501	#endif	605	#endif
502		606
503	#if EV_USE_MONOTONIC	607	#if EV_USE_MONOTONIC
504	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	608	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
…		…
518	# include "ev_win32.c"	622	# include "ev_win32.c"
519	#endif	623	#endif
520		624
521	/*****************************************************************************/	625	/*****************************************************************************/
522		626
		627	/* define a suitable floor function (only used by periodics atm) */
		628
		629	#if EV_USE_FLOOR
		630	# include <math.h>
		631	# define ev_floor(v) floor (v)
		632	#else
		633
		634	#include <float.h>
		635
		636	/* a floor() replacement function, should be independent of ev_tstamp type */
		637	static ev_tstamp noinline
		638	ev_floor (ev_tstamp v)
		639	{
		640	/* the choice of shift factor is not terribly important */
		641	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		642	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		643	#else
		644	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		645	#endif
		646
		647	/* argument too large for an unsigned long? */
		648	if (expect_false (v >= shift))
		649	{
		650	ev_tstamp f;
		651
		652	if (v == v - 1.)
		653	return v; /* very large number */
		654
		655	f = shift * ev_floor (v * (1. / shift));
		656	return f + ev_floor (v - f);
		657	}
		658
		659	/* special treatment for negative args? */
		660	if (expect_false (v < 0.))
		661	{
		662	ev_tstamp f = -ev_floor (-v);
		663
		664	return f - (f == v ? 0 : 1);
		665	}
		666
		667	/* fits into an unsigned long */
		668	return (unsigned long)v;
		669	}
		670
		671	#endif
		672
		673	/*****************************************************************************/
		674
		675	#ifdef __linux
		676	# include <sys/utsname.h>
		677	#endif
		678
		679	static unsigned int noinline ecb_cold
		680	ev_linux_version (void)
		681	{
		682	#ifdef __linux
		683	unsigned int v = 0;
		684	struct utsname buf;
		685	int i;
		686	char *p = buf.release;
		687
		688	if (uname (&buf))
		689	return 0;
		690
		691	for (i = 3+1; --i; )
		692	{
		693	unsigned int c = 0;
		694
		695	for (;;)
		696	{
		697	if (*p >= '0' && *p <= '9')
		698	c = c * 10 + *p++ - '0';
		699	else
		700	{
		701	p += *p == '.';
		702	break;
		703	}
		704	}
		705
		706	v = (v << 8) | c;
		707	}
		708
		709	return v;
		710	#else
		711	return 0;
		712	#endif
		713	}
		714
		715	/*****************************************************************************/
		716
523	#if EV_AVOID_STDIO	717	#if EV_AVOID_STDIO
524	static void noinline	718	static void noinline ecb_cold
525	ev_printerr (const char *msg)	719	ev_printerr (const char *msg)
526	{	720	{
527	write (STDERR_FILENO, msg, strlen (msg));	721	write (STDERR_FILENO, msg, strlen (msg));
528	}	722	}
529	#endif	723	#endif
530		724
531	static void (*syserr_cb)(const char *msg);	725	static void (*syserr_cb)(const char *msg);
532		726
533	void	727	void ecb_cold
534	ev_set_syserr_cb (void (*cb)(const char *msg))	728	ev_set_syserr_cb (void (*cb)(const char *msg))
535	{	729	{
536	syserr_cb = cb;	730	syserr_cb = cb;
537	}	731	}
538		732
539	static void noinline	733	static void noinline ecb_cold
540	ev_syserr (const char *msg)	734	ev_syserr (const char *msg)
541	{	735	{
542	if (!msg)	736	if (!msg)
543	msg = "(libev) system error";	737	msg = "(libev) system error";
544		738
545	if (syserr_cb)	739	if (syserr_cb)
546	syserr_cb (msg);	740	syserr_cb (msg);
547	else	741	else
548	{	742	{
549	#if EV_AVOID_STDIO	743	#if EV_AVOID_STDIO
550	const char *err = strerror (errno);
551
552	ev_printerr (msg);	744	ev_printerr (msg);
553	ev_printerr (": ");	745	ev_printerr (": ");
554	ev_printerr (err);	746	ev_printerr (strerror (errno));
555	ev_printerr ("\n");	747	ev_printerr ("\n");
556	#else	748	#else
557	perror (msg);	749	perror (msg);
558	#endif	750	#endif
559	abort ();	751	abort ();
…		…
579	#endif	771	#endif
580	}	772	}
581		773
582	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	774	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583		775
584	void	776	void ecb_cold
585	ev_set_allocator (void *(*cb)(void *ptr, long size))	777	ev_set_allocator (void *(*cb)(void *ptr, long size))
586	{	778	{
587	alloc = cb;	779	alloc = cb;
588	}	780	}
589		781
…		…
593	ptr = alloc (ptr, size);	785	ptr = alloc (ptr, size);
594		786
595	if (!ptr && size)	787	if (!ptr && size)
596	{	788	{
597	#if EV_AVOID_STDIO	789	#if EV_AVOID_STDIO
598	ev_printerr ("libev: memory allocation failed, aborting.\n");	790	ev_printerr ("(libev) memory allocation failed, aborting.\n");
599	#else	791	#else
600	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	792	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601	#endif	793	#endif
602	abort ();	794	abort ();
603	}	795	}
604		796
605	return ptr;	797	return ptr;
…		…
622	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	814	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623	unsigned char unused;	815	unsigned char unused;
624	#if EV_USE_EPOLL	816	#if EV_USE_EPOLL
625	unsigned int egen; /* generation counter to counter epoll bugs */	817	unsigned int egen; /* generation counter to counter epoll bugs */
626	#endif	818	#endif
627	#if EV_SELECT_IS_WINSOCKET	819	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628	SOCKET handle;	820	SOCKET handle;
		821	#endif
		822	#if EV_USE_IOCP
		823	OVERLAPPED or, ow;
629	#endif	824	#endif
630	} ANFD;	825	} ANFD;
631		826
632	/* stores the pending event set for a given watcher */	827	/* stores the pending event set for a given watcher */
633	typedef struct	828	typedef struct
…		…
698	# define EV_RELEASE_CB (void)0	893	# define EV_RELEASE_CB (void)0
699	# define EV_ACQUIRE_CB (void)0	894	# define EV_ACQUIRE_CB (void)0
700	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	895	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701	#endif	896	#endif
702		897
703	#define EVUNLOOP_RECURSE 0x80	898	#define EVBREAK_RECURSE 0x80
704		899
705	/*****************************************************************************/	900	/*****************************************************************************/
706		901
707	#ifndef EV_HAVE_EV_TIME	902	#ifndef EV_HAVE_EV_TIME
708	ev_tstamp	903	ev_tstamp
…		…
752	if (delay > 0.)	947	if (delay > 0.)
753	{	948	{
754	#if EV_USE_NANOSLEEP	949	#if EV_USE_NANOSLEEP
755	struct timespec ts;	950	struct timespec ts;
756		951
757	ts.tv_sec = (time_t)delay;	952	EV_TS_SET (ts, delay);
758	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760	nanosleep (&ts, 0);	953	nanosleep (&ts, 0);
761	#elif defined(_WIN32)	954	#elif defined(_WIN32)
762	Sleep ((unsigned long)(delay * 1e3));	955	Sleep ((unsigned long)(delay * 1e3));
763	#else	956	#else
764	struct timeval tv;	957	struct timeval tv;
765		958
766	tv.tv_sec = (time_t)delay;
767	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
768
769	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	959	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770	/* something not guaranteed by newer posix versions, but guaranteed */	960	/* something not guaranteed by newer posix versions, but guaranteed */
771	/* by older ones */	961	/* by older ones */
		962	EV_TV_SET (tv, delay);
772	select (0, 0, 0, 0, &tv);	963	select (0, 0, 0, 0, &tv);
773	#endif	964	#endif
774	}	965	}
775	}	966	}
776		967
777	/*****************************************************************************/	968	/*****************************************************************************/
778		969
779	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	970	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780		971
781	/* find a suitable new size for the given array, */	972	/* find a suitable new size for the given array, */
782	/* hopefully by rounding to a ncie-to-malloc size */	973	/* hopefully by rounding to a nice-to-malloc size */
783	inline_size int	974	inline_size int
784	array_nextsize (int elem, int cur, int cnt)	975	array_nextsize (int elem, int cur, int cnt)
785	{	976	{
786	int ncur = cur + 1;	977	int ncur = cur + 1;
787		978
…		…
799	}	990	}
800		991
801	return ncur;	992	return ncur;
802	}	993	}
803		994
804	static noinline void *	995	static void * noinline ecb_cold
805	array_realloc (int elem, void *base, int *cur, int cnt)	996	array_realloc (int elem, void *base, int *cur, int cnt)
806	{	997	{
807	*cur = array_nextsize (elem, *cur, cnt);	998	*cur = array_nextsize (elem, *cur, cnt);
808	return ev_realloc (base, elem * *cur);	999	return ev_realloc (base, elem * *cur);
809	}	1000	}
…		…
812	memset ((void *)(base), 0, sizeof (*(base)) * (count))	1003	memset ((void *)(base), 0, sizeof (*(base)) * (count))
813		1004
814	#define array_needsize(type,base,cur,cnt,init) \	1005	#define array_needsize(type,base,cur,cnt,init) \
815	if (expect_false ((cnt) > (cur))) \	1006	if (expect_false ((cnt) > (cur))) \
816	{ \	1007	{ \
817	int ocur_ = (cur); \	1008	int ecb_unused ocur_ = (cur); \
818	(base) = (type *)array_realloc \	1009	(base) = (type *)array_realloc \
819	(sizeof (type), (base), &(cur), (cnt)); \	1010	(sizeof (type), (base), &(cur), (cnt)); \
820	init ((base) + (ocur_), (cur) - ocur_); \	1011	init ((base) + (ocur_), (cur) - ocur_); \
821	}	1012	}
822		1013
…		…
922	inline_size void	1113	inline_size void
923	fd_reify (EV_P)	1114	fd_reify (EV_P)
924	{	1115	{
925	int i;	1116	int i;
926		1117
		1118	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		1119	for (i = 0; i < fdchangecnt; ++i)
		1120	{
		1121	int fd = fdchanges [i];
		1122	ANFD *anfd = anfds + fd;
		1123
		1124	if (anfd->reify & EV__IOFDSET && anfd->head)
		1125	{
		1126	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1127
		1128	if (handle != anfd->handle)
		1129	{
		1130	unsigned long arg;
		1131
		1132	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1133
		1134	/* handle changed, but fd didn't - we need to do it in two steps */
		1135	backend_modify (EV_A_ fd, anfd->events, 0);
		1136	anfd->events = 0;
		1137	anfd->handle = handle;
		1138	}
		1139	}
		1140	}
		1141	#endif
		1142
927	for (i = 0; i < fdchangecnt; ++i)	1143	for (i = 0; i < fdchangecnt; ++i)
928	{	1144	{
929	int fd = fdchanges [i];	1145	int fd = fdchanges [i];
930	ANFD *anfd = anfds + fd;	1146	ANFD *anfd = anfds + fd;
931	ev_io *w;	1147	ev_io *w;
932		1148
933	unsigned char events = 0;	1149	unsigned char o_events = anfd->events;
		1150	unsigned char o_reify = anfd->reify;
934		1151
935	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1152	anfd->reify = 0;
936	events |= (unsigned char)w->events;
937		1153
938	#if EV_SELECT_IS_WINSOCKET	1154	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939	if (events)
940	{	1155	{
941	unsigned long arg;	1156	anfd->events = 0;
942	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1157
943	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1158	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		1159	anfd->events |= (unsigned char)w->events;
		1160
		1161	if (o_events != anfd->events)
		1162	o_reify = EV__IOFDSET; /* actually |= */
944	}	1163	}
945	#endif
946		1164
947	{	1165	if (o_reify & EV__IOFDSET)
948	unsigned char o_events = anfd->events;
949	unsigned char o_reify = anfd->reify;
950
951	anfd->reify = 0;
952	anfd->events = events;
953
954	if (o_events != events || o_reify & EV__IOFDSET)
955	backend_modify (EV_A_ fd, o_events, events);	1166	backend_modify (EV_A_ fd, o_events, anfd->events);
956	}
957	}	1167	}
958		1168
959	fdchangecnt = 0;	1169	fdchangecnt = 0;
960	}	1170	}
961		1171
…		…
973	fdchanges [fdchangecnt - 1] = fd;	1183	fdchanges [fdchangecnt - 1] = fd;
974	}	1184	}
975	}	1185	}
976		1186
977	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1187	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978	inline_speed void	1188	inline_speed void ecb_cold
979	fd_kill (EV_P_ int fd)	1189	fd_kill (EV_P_ int fd)
980	{	1190	{
981	ev_io *w;	1191	ev_io *w;
982		1192
983	while ((w = (ev_io *)anfds [fd].head))	1193	while ((w = (ev_io *)anfds [fd].head))
…		…
986	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1196	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987	}	1197	}
988	}	1198	}
989		1199
990	/* check whether the given fd is actually valid, for error recovery */	1200	/* check whether the given fd is actually valid, for error recovery */
991	inline_size int	1201	inline_size int ecb_cold
992	fd_valid (int fd)	1202	fd_valid (int fd)
993	{	1203	{
994	#ifdef _WIN32	1204	#ifdef _WIN32
995	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1205	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996	#else	1206	#else
997	return fcntl (fd, F_GETFD) != -1;	1207	return fcntl (fd, F_GETFD) != -1;
998	#endif	1208	#endif
999	}	1209	}
1000		1210
1001	/* called on EBADF to verify fds */	1211	/* called on EBADF to verify fds */
1002	static void noinline	1212	static void noinline ecb_cold
1003	fd_ebadf (EV_P)	1213	fd_ebadf (EV_P)
1004	{	1214	{
1005	int fd;	1215	int fd;
1006		1216
1007	for (fd = 0; fd < anfdmax; ++fd)	1217	for (fd = 0; fd < anfdmax; ++fd)
…		…
1009	if (!fd_valid (fd) && errno == EBADF)	1219	if (!fd_valid (fd) && errno == EBADF)
1010	fd_kill (EV_A_ fd);	1220	fd_kill (EV_A_ fd);
1011	}	1221	}
1012		1222
1013	/* called on ENOMEM in select/poll to kill some fds and retry */	1223	/* called on ENOMEM in select/poll to kill some fds and retry */
1014	static void noinline	1224	static void noinline ecb_cold
1015	fd_enomem (EV_P)	1225	fd_enomem (EV_P)
1016	{	1226	{
1017	int fd;	1227	int fd;
1018		1228
1019	for (fd = anfdmax; fd--; )	1229	for (fd = anfdmax; fd--; )
…		…
1054	}	1264	}
1055		1265
1056	/*****************************************************************************/	1266	/*****************************************************************************/
1057		1267
1058	/*	1268	/*
1059	* the heap functions want a real array index. array index 0 uis guaranteed to not	1269	* the heap functions want a real array index. array index 0 is guaranteed to not
1060	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives	1270	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061	* the branching factor of the d-tree.	1271	* the branching factor of the d-tree.
1062	*/	1272	*/
1063		1273
1064	/*	1274	/*
…		…
1214		1424
1215	/*****************************************************************************/	1425	/*****************************************************************************/
1216		1426
1217	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE	1427	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218		1428
1219	static void noinline	1429	static void noinline ecb_cold
1220	evpipe_init (EV_P)	1430	evpipe_init (EV_P)
1221	{	1431	{
1222	if (!ev_is_active (&pipe_w))	1432	if (!ev_is_active (&pipe_w))
1223	{	1433	{
1224	# if EV_USE_EVENTFD	1434	# if EV_USE_EVENTFD
…		…
1246	ev_io_start (EV_A_ &pipe_w);	1456	ev_io_start (EV_A_ &pipe_w);
1247	ev_unref (EV_A); /* watcher should not keep loop alive */	1457	ev_unref (EV_A); /* watcher should not keep loop alive */
1248	}	1458	}
1249	}	1459	}
1250		1460
1251	inline_size void	1461	inline_speed void
1252	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1462	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253	{	1463	{
1254	if (!*flag)	1464	if (expect_true (*flag))
		1465	return;
		1466
		1467	*flag = 1;
		1468
		1469	ECB_MEMORY_FENCE_RELEASE;
		1470
		1471	pipe_write_skipped = 1;
		1472
		1473	ECB_MEMORY_FENCE;
		1474
		1475	if (pipe_write_wanted)
1255	{	1476	{
		1477	int old_errno;
		1478
		1479	pipe_write_skipped = 0; /* optimisation only */
		1480
1256	int old_errno = errno; /* save errno because write might clobber it */	1481	old_errno = errno; /* save errno because write will clobber it */
1257	char dummy;
1258
1259	*flag = 1;
1260		1482
1261	#if EV_USE_EVENTFD	1483	#if EV_USE_EVENTFD
1262	if (evfd >= 0)	1484	if (evfd >= 0)
1263	{	1485	{
1264	uint64_t counter = 1;	1486	uint64_t counter = 1;
1265	write (evfd, &counter, sizeof (uint64_t));	1487	write (evfd, &counter, sizeof (uint64_t));
1266	}	1488	}
1267	else	1489	else
1268	#endif	1490	#endif
		1491	{
		1492	/* win32 people keep sending patches that change this write() to send() */
		1493	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1494	/* so when you think this write should be a send instead, please find out */
		1495	/* where your send() is from - it's definitely not the microsoft send, and */
		1496	/* tell me. thank you. */
1269	write (evpipe [1], &dummy, 1);	1497	write (evpipe [1], &(evpipe [1]), 1);
		1498	}
1270		1499
1271	errno = old_errno;	1500	errno = old_errno;
1272	}	1501	}
1273	}	1502	}
1274		1503
…		…
1277	static void	1506	static void
1278	pipecb (EV_P_ ev_io *iow, int revents)	1507	pipecb (EV_P_ ev_io *iow, int revents)
1279	{	1508	{
1280	int i;	1509	int i;
1281		1510
		1511	if (revents & EV_READ)
		1512	{
1282	#if EV_USE_EVENTFD	1513	#if EV_USE_EVENTFD
1283	if (evfd >= 0)	1514	if (evfd >= 0)
1284	{	1515	{
1285	uint64_t counter;	1516	uint64_t counter;
1286	read (evfd, &counter, sizeof (uint64_t));	1517	read (evfd, &counter, sizeof (uint64_t));
1287	}	1518	}
1288	else	1519	else
1289	#endif	1520	#endif
1290	{	1521	{
1291	char dummy;	1522	char dummy;
		1523	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1292	read (evpipe [0], &dummy, 1);	1524	read (evpipe [0], &dummy, 1);
		1525	}
1293	}	1526	}
1294		1527
		1528	pipe_write_skipped = 0;
		1529
		1530	#if EV_SIGNAL_ENABLE
1295	if (sig_pending)	1531	if (sig_pending)
1296	{	1532	{
1297	sig_pending = 0;	1533	sig_pending = 0;
1298		1534
1299	for (i = EV_NSIG - 1; i--; )	1535	for (i = EV_NSIG - 1; i--; )
1300	if (expect_false (signals [i].pending))	1536	if (expect_false (signals [i].pending))
1301	ev_feed_signal_event (EV_A_ i + 1);	1537	ev_feed_signal_event (EV_A_ i + 1);
1302	}	1538	}
		1539	#endif
1303		1540
1304	#if EV_ASYNC_ENABLE	1541	#if EV_ASYNC_ENABLE
1305	if (async_pending)	1542	if (async_pending)
1306	{	1543	{
1307	async_pending = 0;	1544	async_pending = 0;
…		…
1316	#endif	1553	#endif
1317	}	1554	}
1318		1555
1319	/*****************************************************************************/	1556	/*****************************************************************************/
1320		1557
		1558	void
		1559	ev_feed_signal (int signum)
		1560	{
		1561	#if EV_MULTIPLICITY
		1562	EV_P = signals [signum - 1].loop;
		1563
		1564	if (!EV_A)
		1565	return;
		1566	#endif
		1567
		1568	if (!ev_active (&pipe_w))
		1569	return;
		1570
		1571	signals [signum - 1].pending = 1;
		1572	evpipe_write (EV_A_ &sig_pending);
		1573	}
		1574
1321	static void	1575	static void
1322	ev_sighandler (int signum)	1576	ev_sighandler (int signum)
1323	{	1577	{
1324	#if EV_MULTIPLICITY
1325	EV_P = signals [signum - 1].loop;
1326	#endif
1327
1328	#ifdef _WIN32	1578	#ifdef _WIN32
1329	signal (signum, ev_sighandler);	1579	signal (signum, ev_sighandler);
1330	#endif	1580	#endif
1331		1581
1332	signals [signum - 1].pending = 1;	1582	ev_feed_signal (signum);
1333	evpipe_write (EV_A_ &sig_pending);
1334	}	1583	}
1335		1584
1336	void noinline	1585	void noinline
1337	ev_feed_signal_event (EV_P_ int signum)	1586	ev_feed_signal_event (EV_P_ int signum)
1338	{	1587	{
…		…
1438		1687
1439	#endif	1688	#endif
1440		1689
1441	/*****************************************************************************/	1690	/*****************************************************************************/
1442		1691
		1692	#if EV_USE_IOCP
		1693	# include "ev_iocp.c"
		1694	#endif
1443	#if EV_USE_PORT	1695	#if EV_USE_PORT
1444	# include "ev_port.c"	1696	# include "ev_port.c"
1445	#endif	1697	#endif
1446	#if EV_USE_KQUEUE	1698	#if EV_USE_KQUEUE
1447	# include "ev_kqueue.c"	1699	# include "ev_kqueue.c"
…		…
1454	#endif	1706	#endif
1455	#if EV_USE_SELECT	1707	#if EV_USE_SELECT
1456	# include "ev_select.c"	1708	# include "ev_select.c"
1457	#endif	1709	#endif
1458		1710
1459	int	1711	int ecb_cold
1460	ev_version_major (void)	1712	ev_version_major (void)
1461	{	1713	{
1462	return EV_VERSION_MAJOR;	1714	return EV_VERSION_MAJOR;
1463	}	1715	}
1464		1716
1465	int	1717	int ecb_cold
1466	ev_version_minor (void)	1718	ev_version_minor (void)
1467	{	1719	{
1468	return EV_VERSION_MINOR;	1720	return EV_VERSION_MINOR;
1469	}	1721	}
1470		1722
1471	/* return true if we are running with elevated privileges and should ignore env variables */	1723	/* return true if we are running with elevated privileges and should ignore env variables */
1472	int inline_size	1724	int inline_size ecb_cold
1473	enable_secure (void)	1725	enable_secure (void)
1474	{	1726	{
1475	#ifdef _WIN32	1727	#ifdef _WIN32
1476	return 0;	1728	return 0;
1477	#else	1729	#else
1478	return getuid () != geteuid ()	1730	return getuid () != geteuid ()
1479	|| getgid () != getegid ();	1731	|| getgid () != getegid ();
1480	#endif	1732	#endif
1481	}	1733	}
1482		1734
1483	unsigned int	1735	unsigned int ecb_cold
1484	ev_supported_backends (void)	1736	ev_supported_backends (void)
1485	{	1737	{
1486	unsigned int flags = 0;	1738	unsigned int flags = 0;
1487		1739
1488	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	1740	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
…		…
1492	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;	1744	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493		1745
1494	return flags;	1746	return flags;
1495	}	1747	}
1496		1748
1497	unsigned int	1749	unsigned int ecb_cold
1498	ev_recommended_backends (void)	1750	ev_recommended_backends (void)
1499	{	1751	{
1500	unsigned int flags = ev_supported_backends ();	1752	unsigned int flags = ev_supported_backends ();
1501		1753
1502	#ifndef __NetBSD__	1754	#ifndef __NetBSD__
…		…
1507	#ifdef __APPLE__	1759	#ifdef __APPLE__
1508	/* only select works correctly on that "unix-certified" platform */	1760	/* only select works correctly on that "unix-certified" platform */
1509	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */	1761	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */	1762	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511	#endif	1763	#endif
		1764	#ifdef __FreeBSD__
		1765	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
		1766	#endif
1512		1767
1513	return flags;	1768	return flags;
1514	}	1769	}
1515		1770
1516	unsigned int	1771	unsigned int ecb_cold
1517	ev_embeddable_backends (void)	1772	ev_embeddable_backends (void)
1518	{	1773	{
1519	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	1774	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520		1775
1521	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1776	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1522	/* please fix it and tell me how to detect the fix */	1777	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1523	flags &= ~EVBACKEND_EPOLL;	1778	flags &= ~EVBACKEND_EPOLL;
1524		1779
1525	return flags;	1780	return flags;
1526	}	1781	}
1527		1782
1528	unsigned int	1783	unsigned int
…		…
1566	ev_userdata (EV_P)	1821	ev_userdata (EV_P)
1567	{	1822	{
1568	return userdata;	1823	return userdata;
1569	}	1824	}
1570		1825
		1826	void
1571	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1827	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572	{	1828	{
1573	invoke_cb = invoke_pending_cb;	1829	invoke_cb = invoke_pending_cb;
1574	}	1830	}
1575		1831
		1832	void
1576	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))	1833	ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577	{	1834	{
1578	release_cb = release;	1835	release_cb = release;
1579	acquire_cb = acquire;	1836	acquire_cb = acquire;
1580	}	1837	}
1581	#endif	1838	#endif
1582		1839
1583	/* initialise a loop structure, must be zero-initialised */	1840	/* initialise a loop structure, must be zero-initialised */
1584	static void noinline	1841	static void noinline ecb_cold
1585	loop_init (EV_P_ unsigned int flags)	1842	loop_init (EV_P_ unsigned int flags)
1586	{	1843	{
1587	if (!backend)	1844	if (!backend)
1588	{	1845	{
		1846	origflags = flags;
		1847
1589	#if EV_USE_REALTIME	1848	#if EV_USE_REALTIME
1590	if (!have_realtime)	1849	if (!have_realtime)
1591	{	1850	{
1592	struct timespec ts;	1851	struct timespec ts;
1593		1852
…		…
1615	if (!(flags & EVFLAG_NOENV)	1874	if (!(flags & EVFLAG_NOENV)
1616	&& !enable_secure ()	1875	&& !enable_secure ()
1617	&& getenv ("LIBEV_FLAGS"))	1876	&& getenv ("LIBEV_FLAGS"))
1618	flags = atoi (getenv ("LIBEV_FLAGS"));	1877	flags = atoi (getenv ("LIBEV_FLAGS"));
1619		1878
1620	ev_rt_now = ev_time ();	1879	ev_rt_now = ev_time ();
1621	mn_now = get_clock ();	1880	mn_now = get_clock ();
1622	now_floor = mn_now;	1881	now_floor = mn_now;
1623	rtmn_diff = ev_rt_now - mn_now;	1882	rtmn_diff = ev_rt_now - mn_now;
1624	#if EV_FEATURE_API	1883	#if EV_FEATURE_API
1625	invoke_cb = ev_invoke_pending;	1884	invoke_cb = ev_invoke_pending;
1626	#endif	1885	#endif
1627		1886
1628	io_blocktime = 0.;	1887	io_blocktime = 0.;
1629	timeout_blocktime = 0.;	1888	timeout_blocktime = 0.;
1630	backend = 0;	1889	backend = 0;
1631	backend_fd = -1;	1890	backend_fd = -1;
1632	sig_pending = 0;	1891	sig_pending = 0;
1633	#if EV_ASYNC_ENABLE	1892	#if EV_ASYNC_ENABLE
1634	async_pending = 0;	1893	async_pending = 0;
1635	#endif	1894	#endif
		1895	pipe_write_skipped = 0;
		1896	pipe_write_wanted = 0;
1636	#if EV_USE_INOTIFY	1897	#if EV_USE_INOTIFY
1637	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1898	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638	#endif	1899	#endif
1639	#if EV_USE_SIGNALFD	1900	#if EV_USE_SIGNALFD
1640	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1901	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641	#endif	1902	#endif
1642		1903
1643	if (!(flags & 0x0000ffffU))	1904	if (!(flags & EVBACKEND_MASK))
1644	flags |= ev_recommended_backends ();	1905	flags |= ev_recommended_backends ();
1645		1906
		1907	#if EV_USE_IOCP
		1908	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1909	#endif
1646	#if EV_USE_PORT	1910	#if EV_USE_PORT
1647	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1911	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648	#endif	1912	#endif
1649	#if EV_USE_KQUEUE	1913	#if EV_USE_KQUEUE
1650	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1914	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1667	#endif	1931	#endif
1668	}	1932	}
1669	}	1933	}
1670		1934
1671	/* free up a loop structure */	1935	/* free up a loop structure */
1672	static void noinline	1936	void ecb_cold
1673	loop_destroy (EV_P)	1937	ev_loop_destroy (EV_P)
1674	{	1938	{
1675	int i;	1939	int i;
		1940
		1941	#if EV_MULTIPLICITY
		1942	/* mimic free (0) */
		1943	if (!EV_A)
		1944	return;
		1945	#endif
		1946
		1947	#if EV_CLEANUP_ENABLE
		1948	/* queue cleanup watchers (and execute them) */
		1949	if (expect_false (cleanupcnt))
		1950	{
		1951	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1952	EV_INVOKE_PENDING;
		1953	}
		1954	#endif
		1955
		1956	#if EV_CHILD_ENABLE
		1957	if (ev_is_active (&childev))
		1958	{
		1959	ev_ref (EV_A); /* child watcher */
		1960	ev_signal_stop (EV_A_ &childev);
		1961	}
		1962	#endif
1676		1963
1677	if (ev_is_active (&pipe_w))	1964	if (ev_is_active (&pipe_w))
1678	{	1965	{
1679	/*ev_ref (EV_A);*/	1966	/*ev_ref (EV_A);*/
1680	/*ev_io_stop (EV_A_ &pipe_w);*/	1967	/*ev_io_stop (EV_A_ &pipe_w);*/
…		…
1702	#endif	1989	#endif
1703		1990
1704	if (backend_fd >= 0)	1991	if (backend_fd >= 0)
1705	close (backend_fd);	1992	close (backend_fd);
1706		1993
		1994	#if EV_USE_IOCP
		1995	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1996	#endif
1707	#if EV_USE_PORT	1997	#if EV_USE_PORT
1708	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1998	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709	#endif	1999	#endif
1710	#if EV_USE_KQUEUE	2000	#if EV_USE_KQUEUE
1711	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	2001	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1738	array_free (periodic, EMPTY);	2028	array_free (periodic, EMPTY);
1739	#endif	2029	#endif
1740	#if EV_FORK_ENABLE	2030	#if EV_FORK_ENABLE
1741	array_free (fork, EMPTY);	2031	array_free (fork, EMPTY);
1742	#endif	2032	#endif
		2033	#if EV_CLEANUP_ENABLE
		2034	array_free (cleanup, EMPTY);
		2035	#endif
1743	array_free (prepare, EMPTY);	2036	array_free (prepare, EMPTY);
1744	array_free (check, EMPTY);	2037	array_free (check, EMPTY);
1745	#if EV_ASYNC_ENABLE	2038	#if EV_ASYNC_ENABLE
1746	array_free (async, EMPTY);	2039	array_free (async, EMPTY);
1747	#endif	2040	#endif
1748		2041
1749	backend = 0;	2042	backend = 0;
		2043
		2044	#if EV_MULTIPLICITY
		2045	if (ev_is_default_loop (EV_A))
		2046	#endif
		2047	ev_default_loop_ptr = 0;
		2048	#if EV_MULTIPLICITY
		2049	else
		2050	ev_free (EV_A);
		2051	#endif
1750	}	2052	}
1751		2053
1752	#if EV_USE_INOTIFY	2054	#if EV_USE_INOTIFY
1753	inline_size void infy_fork (EV_P);	2055	inline_size void infy_fork (EV_P);
1754	#endif	2056	#endif
…		…
1769	infy_fork (EV_A);	2071	infy_fork (EV_A);
1770	#endif	2072	#endif
1771		2073
1772	if (ev_is_active (&pipe_w))	2074	if (ev_is_active (&pipe_w))
1773	{	2075	{
1774	/* this "locks" the handlers against writing to the pipe */	2076	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1775	/* while we modify the fd vars */
1776	sig_pending = 1;
1777	#if EV_ASYNC_ENABLE
1778	async_pending = 1;
1779	#endif
1780		2077
1781	ev_ref (EV_A);	2078	ev_ref (EV_A);
1782	ev_io_stop (EV_A_ &pipe_w);	2079	ev_io_stop (EV_A_ &pipe_w);
1783		2080
1784	#if EV_USE_EVENTFD	2081	#if EV_USE_EVENTFD
…		…
1802	postfork = 0;	2099	postfork = 0;
1803	}	2100	}
1804		2101
1805	#if EV_MULTIPLICITY	2102	#if EV_MULTIPLICITY
1806		2103
1807	struct ev_loop *	2104	struct ev_loop * ecb_cold
1808	ev_loop_new (unsigned int flags)	2105	ev_loop_new (unsigned int flags)
1809	{	2106	{
1810	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2107	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811		2108
1812	memset (EV_A, 0, sizeof (struct ev_loop));	2109	memset (EV_A, 0, sizeof (struct ev_loop));
1813	loop_init (EV_A_ flags);	2110	loop_init (EV_A_ flags);
1814		2111
1815	if (ev_backend (EV_A))	2112	if (ev_backend (EV_A))
1816	return EV_A;	2113	return EV_A;
1817		2114
		2115	ev_free (EV_A);
1818	return 0;	2116	return 0;
1819	}	2117	}
1820		2118
1821	void
1822	ev_loop_destroy (EV_P)
1823	{
1824	loop_destroy (EV_A);
1825	ev_free (loop);
1826	}
1827
1828	void
1829	ev_loop_fork (EV_P)
1830	{
1831	postfork = 1; /* must be in line with ev_default_fork */
1832	}
1833	#endif /* multiplicity */	2119	#endif /* multiplicity */
1834		2120
1835	#if EV_VERIFY	2121	#if EV_VERIFY
1836	static void noinline	2122	static void noinline ecb_cold
1837	verify_watcher (EV_P_ W w)	2123	verify_watcher (EV_P_ W w)
1838	{	2124	{
1839	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2125	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840		2126
1841	if (w->pending)	2127	if (w->pending)
1842	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2128	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843	}	2129	}
1844		2130
1845	static void noinline	2131	static void noinline ecb_cold
1846	verify_heap (EV_P_ ANHE *heap, int N)	2132	verify_heap (EV_P_ ANHE *heap, int N)
1847	{	2133	{
1848	int i;	2134	int i;
1849		2135
1850	for (i = HEAP0; i < N + HEAP0; ++i)	2136	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1855		2141
1856	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2142	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857	}	2143	}
1858	}	2144	}
1859		2145
1860	static void noinline	2146	static void noinline ecb_cold
1861	array_verify (EV_P_ W *ws, int cnt)	2147	array_verify (EV_P_ W *ws, int cnt)
1862	{	2148	{
1863	while (cnt--)	2149	while (cnt--)
1864	{	2150	{
1865	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2151	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1867	}	2153	}
1868	}	2154	}
1869	#endif	2155	#endif
1870		2156
1871	#if EV_FEATURE_API	2157	#if EV_FEATURE_API
1872	void	2158	void ecb_cold
1873	ev_verify (EV_P)	2159	ev_verify (EV_P)
1874	{	2160	{
1875	#if EV_VERIFY	2161	#if EV_VERIFY
1876	int i;	2162	int i;
1877	WL w;	2163	WL w;
…		…
1912	#if EV_FORK_ENABLE	2198	#if EV_FORK_ENABLE
1913	assert (forkmax >= forkcnt);	2199	assert (forkmax >= forkcnt);
1914	array_verify (EV_A_ (W *)forks, forkcnt);	2200	array_verify (EV_A_ (W *)forks, forkcnt);
1915	#endif	2201	#endif
1916		2202
		2203	#if EV_CLEANUP_ENABLE
		2204	assert (cleanupmax >= cleanupcnt);
		2205	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2206	#endif
		2207
1917	#if EV_ASYNC_ENABLE	2208	#if EV_ASYNC_ENABLE
1918	assert (asyncmax >= asynccnt);	2209	assert (asyncmax >= asynccnt);
1919	array_verify (EV_A_ (W *)asyncs, asynccnt);	2210	array_verify (EV_A_ (W *)asyncs, asynccnt);
1920	#endif	2211	#endif
1921		2212
…		…
1938	#endif	2229	#endif
1939	}	2230	}
1940	#endif	2231	#endif
1941		2232
1942	#if EV_MULTIPLICITY	2233	#if EV_MULTIPLICITY
1943	struct ev_loop *	2234	struct ev_loop * ecb_cold
1944	ev_default_loop_init (unsigned int flags)
1945	#else	2235	#else
1946	int	2236	int
		2237	#endif
1947	ev_default_loop (unsigned int flags)	2238	ev_default_loop (unsigned int flags)
1948	#endif
1949	{	2239	{
1950	if (!ev_default_loop_ptr)	2240	if (!ev_default_loop_ptr)
1951	{	2241	{
1952	#if EV_MULTIPLICITY	2242	#if EV_MULTIPLICITY
1953	EV_P = ev_default_loop_ptr = &default_loop_struct;	2243	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1972		2262
1973	return ev_default_loop_ptr;	2263	return ev_default_loop_ptr;
1974	}	2264	}
1975		2265
1976	void	2266	void
1977	ev_default_destroy (void)	2267	ev_loop_fork (EV_P)
1978	{	2268	{
1979	#if EV_MULTIPLICITY
1980	EV_P = ev_default_loop_ptr;
1981	#endif
1982
1983	ev_default_loop_ptr = 0;
1984
1985	#if EV_CHILD_ENABLE
1986	ev_ref (EV_A); /* child watcher */
1987	ev_signal_stop (EV_A_ &childev);
1988	#endif
1989
1990	loop_destroy (EV_A);
1991	}
1992
1993	void
1994	ev_default_fork (void)
1995	{
1996	#if EV_MULTIPLICITY
1997	EV_P = ev_default_loop_ptr;
1998	#endif
1999
2000	postfork = 1; /* must be in line with ev_loop_fork */	2269	postfork = 1; /* must be in line with ev_default_fork */
2001	}	2270	}
2002		2271
2003	/*****************************************************************************/	2272	/*****************************************************************************/
2004		2273
2005	void	2274	void
…		…
2027		2296
2028	for (pri = NUMPRI; pri--; )	2297	for (pri = NUMPRI; pri--; )
2029	while (pendingcnt [pri])	2298	while (pendingcnt [pri])
2030	{	2299	{
2031	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2300	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2032
2033	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2034	/* ^ this is no longer true, as pending_w could be here */
2035		2301
2036	p->w->pending = 0;	2302	p->w->pending = 0;
2037	EV_CB_INVOKE (p->w, p->events);	2303	EV_CB_INVOKE (p->w, p->events);
2038	EV_FREQUENT_CHECK;	2304	EV_FREQUENT_CHECK;
2039	}	2305	}
…		…
2096	EV_FREQUENT_CHECK;	2362	EV_FREQUENT_CHECK;
2097	feed_reverse (EV_A_ (W)w);	2363	feed_reverse (EV_A_ (W)w);
2098	}	2364	}
2099	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);	2365	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2100		2366
2101	feed_reverse_done (EV_A_ EV_TIMEOUT);	2367	feed_reverse_done (EV_A_ EV_TIMER);
2102	}	2368	}
2103	}	2369	}
2104		2370
2105	#if EV_PERIODIC_ENABLE	2371	#if EV_PERIODIC_ENABLE
		2372
		2373	static void noinline
		2374	periodic_recalc (EV_P_ ev_periodic *w)
		2375	{
		2376	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2377	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2378
		2379	/* the above almost always errs on the low side */
		2380	while (at <= ev_rt_now)
		2381	{
		2382	ev_tstamp nat = at + w->interval;
		2383
		2384	/* when resolution fails us, we use ev_rt_now */
		2385	if (expect_false (nat == at))
		2386	{
		2387	at = ev_rt_now;
		2388	break;
		2389	}
		2390
		2391	at = nat;
		2392	}
		2393
		2394	ev_at (w) = at;
		2395	}
		2396
2106	/* make periodics pending */	2397	/* make periodics pending */
2107	inline_size void	2398	inline_size void
2108	periodics_reify (EV_P)	2399	periodics_reify (EV_P)
2109	{	2400	{
2110	EV_FREQUENT_CHECK;	2401	EV_FREQUENT_CHECK;
…		…
2129	ANHE_at_cache (periodics [HEAP0]);	2420	ANHE_at_cache (periodics [HEAP0]);
2130	downheap (periodics, periodiccnt, HEAP0);	2421	downheap (periodics, periodiccnt, HEAP0);
2131	}	2422	}
2132	else if (w->interval)	2423	else if (w->interval)
2133	{	2424	{
2134	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2425	periodic_recalc (EV_A_ w);
2135	/* if next trigger time is not sufficiently in the future, put it there */
2136	/* this might happen because of floating point inexactness */
2137	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2138	{
2139	ev_at (w) += w->interval;
2140
2141	/* if interval is unreasonably low we might still have a time in the past */
2142	/* so correct this. this will make the periodic very inexact, but the user */
2143	/* has effectively asked to get triggered more often than possible */
2144	if (ev_at (w) < ev_rt_now)
2145	ev_at (w) = ev_rt_now;
2146	}
2147
2148	ANHE_at_cache (periodics [HEAP0]);	2426	ANHE_at_cache (periodics [HEAP0]);
2149	downheap (periodics, periodiccnt, HEAP0);	2427	downheap (periodics, periodiccnt, HEAP0);
2150	}	2428	}
2151	else	2429	else
2152	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2430	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2159	feed_reverse_done (EV_A_ EV_PERIODIC);	2437	feed_reverse_done (EV_A_ EV_PERIODIC);
2160	}	2438	}
2161	}	2439	}
2162		2440
2163	/* simply recalculate all periodics */	2441	/* simply recalculate all periodics */
2164	/* TODO: maybe ensure that at leats one event happens when jumping forward? */	2442	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2165	static void noinline	2443	static void noinline ecb_cold
2166	periodics_reschedule (EV_P)	2444	periodics_reschedule (EV_P)
2167	{	2445	{
2168	int i;	2446	int i;
2169		2447
2170	/* adjust periodics after time jump */	2448	/* adjust periodics after time jump */
…		…
2173	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);	2451	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174		2452
2175	if (w->reschedule_cb)	2453	if (w->reschedule_cb)
2176	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2454	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177	else if (w->interval)	2455	else if (w->interval)
2178	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2456	periodic_recalc (EV_A_ w);
2179		2457
2180	ANHE_at_cache (periodics [i]);	2458	ANHE_at_cache (periodics [i]);
2181	}	2459	}
2182		2460
2183	reheap (periodics, periodiccnt);	2461	reheap (periodics, periodiccnt);
2184	}	2462	}
2185	#endif	2463	#endif
2186		2464
2187	/* adjust all timers by a given offset */	2465	/* adjust all timers by a given offset */
2188	static void noinline	2466	static void noinline ecb_cold
2189	timers_reschedule (EV_P_ ev_tstamp adjust)	2467	timers_reschedule (EV_P_ ev_tstamp adjust)
2190	{	2468	{
2191	int i;	2469	int i;
2192		2470
2193	for (i = 0; i < timercnt; ++i)	2471	for (i = 0; i < timercnt; ++i)
…		…
2230	* doesn't hurt either as we only do this on time-jumps or	2508	* doesn't hurt either as we only do this on time-jumps or
2231	* in the unlikely event of having been preempted here.	2509	* in the unlikely event of having been preempted here.
2232	*/	2510	*/
2233	for (i = 4; --i; )	2511	for (i = 4; --i; )
2234	{	2512	{
		2513	ev_tstamp diff;
2235	rtmn_diff = ev_rt_now - mn_now;	2514	rtmn_diff = ev_rt_now - mn_now;
2236		2515
		2516	diff = odiff - rtmn_diff;
		2517
2237	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2518	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2238	return; /* all is well */	2519	return; /* all is well */
2239		2520
2240	ev_rt_now = ev_time ();	2521	ev_rt_now = ev_time ();
2241	mn_now = get_clock ();	2522	mn_now = get_clock ();
2242	now_floor = mn_now;	2523	now_floor = mn_now;
…		…
2265	mn_now = ev_rt_now;	2546	mn_now = ev_rt_now;
2266	}	2547	}
2267	}	2548	}
2268		2549
2269	void	2550	void
2270	ev_loop (EV_P_ int flags)	2551	ev_run (EV_P_ int flags)
2271	{	2552	{
2272	#if EV_FEATURE_API	2553	#if EV_FEATURE_API
2273	++loop_depth;	2554	++loop_depth;
2274	#endif	2555	#endif
2275		2556
2276	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2557	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2277		2558
2278	loop_done = EVUNLOOP_CANCEL;	2559	loop_done = EVBREAK_CANCEL;
2279		2560
2280	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2561	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2281		2562
2282	do	2563	do
2283	{	2564	{
…		…
2326	/* calculate blocking time */	2607	/* calculate blocking time */
2327	{	2608	{
2328	ev_tstamp waittime = 0.;	2609	ev_tstamp waittime = 0.;
2329	ev_tstamp sleeptime = 0.;	2610	ev_tstamp sleeptime = 0.;
2330		2611
		2612	/* remember old timestamp for io_blocktime calculation */
		2613	ev_tstamp prev_mn_now = mn_now;
		2614
		2615	/* update time to cancel out callback processing overhead */
		2616	time_update (EV_A_ 1e100);
		2617
		2618	/* from now on, we want a pipe-wake-up */
		2619	pipe_write_wanted = 1;
		2620
		2621	ECB_MEMORY_FENCE;
		2622
2331	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2623	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2332	{	2624	{
2333	/* remember old timestamp for io_blocktime calculation */
2334	ev_tstamp prev_mn_now = mn_now;
2335
2336	/* update time to cancel out callback processing overhead */
2337	time_update (EV_A_ 1e100);
2338
2339	waittime = MAX_BLOCKTIME;	2625	waittime = MAX_BLOCKTIME;
2340		2626
2341	if (timercnt)	2627	if (timercnt)
2342	{	2628	{
2343	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2629	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2344	if (waittime > to) waittime = to;	2630	if (waittime > to) waittime = to;
2345	}	2631	}
2346		2632
2347	#if EV_PERIODIC_ENABLE	2633	#if EV_PERIODIC_ENABLE
2348	if (periodiccnt)	2634	if (periodiccnt)
2349	{	2635	{
2350	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2636	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2351	if (waittime > to) waittime = to;	2637	if (waittime > to) waittime = to;
2352	}	2638	}
2353	#endif	2639	#endif
2354		2640
2355	/* don't let timeouts decrease the waittime below timeout_blocktime */	2641	/* don't let timeouts decrease the waittime below timeout_blocktime */
2356	if (expect_false (waittime < timeout_blocktime))	2642	if (expect_false (waittime < timeout_blocktime))
2357	waittime = timeout_blocktime;	2643	waittime = timeout_blocktime;
		2644
		2645	/* at this point, we NEED to wait, so we have to ensure */
		2646	/* to pass a minimum nonzero value to the backend */
		2647	if (expect_false (waittime < backend_mintime))
		2648	waittime = backend_mintime;
2358		2649
2359	/* extra check because io_blocktime is commonly 0 */	2650	/* extra check because io_blocktime is commonly 0 */
2360	if (expect_false (io_blocktime))	2651	if (expect_false (io_blocktime))
2361	{	2652	{
2362	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2653	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363		2654
2364	if (sleeptime > waittime - backend_fudge)	2655	if (sleeptime > waittime - backend_mintime)
2365	sleeptime = waittime - backend_fudge;	2656	sleeptime = waittime - backend_mintime;
2366		2657
2367	if (expect_true (sleeptime > 0.))	2658	if (expect_true (sleeptime > 0.))
2368	{	2659	{
2369	ev_sleep (sleeptime);	2660	ev_sleep (sleeptime);
2370	waittime -= sleeptime;	2661	waittime -= sleeptime;
…		…
2373	}	2664	}
2374		2665
2375	#if EV_FEATURE_API	2666	#if EV_FEATURE_API
2376	++loop_count;	2667	++loop_count;
2377	#endif	2668	#endif
2378	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2669	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2379	backend_poll (EV_A_ waittime);	2670	backend_poll (EV_A_ waittime);
2380	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */	2671	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2672
		2673	pipe_write_wanted = 0;
		2674
		2675	if (pipe_write_skipped)
		2676	{
		2677	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2678	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2679	}
		2680
2381		2681
2382	/* update ev_rt_now, do magic */	2682	/* update ev_rt_now, do magic */
2383	time_update (EV_A_ waittime + sleeptime);	2683	time_update (EV_A_ waittime + sleeptime);
2384	}	2684	}
2385		2685
…		…
2403	EV_INVOKE_PENDING;	2703	EV_INVOKE_PENDING;
2404	}	2704	}
2405	while (expect_true (	2705	while (expect_true (
2406	activecnt	2706	activecnt
2407	&& !loop_done	2707	&& !loop_done
2408	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2708	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2409	));	2709	));
2410		2710
2411	if (loop_done == EVUNLOOP_ONE)	2711	if (loop_done == EVBREAK_ONE)
2412	loop_done = EVUNLOOP_CANCEL;	2712	loop_done = EVBREAK_CANCEL;
2413		2713
2414	#if EV_FEATURE_API	2714	#if EV_FEATURE_API
2415	--loop_depth;	2715	--loop_depth;
2416	#endif	2716	#endif
2417	}	2717	}
2418		2718
2419	void	2719	void
2420	ev_unloop (EV_P_ int how)	2720	ev_break (EV_P_ int how)
2421	{	2721	{
2422	loop_done = how;	2722	loop_done = how;
2423	}	2723	}
2424		2724
2425	void	2725	void
…		…
2573	EV_FREQUENT_CHECK;	2873	EV_FREQUENT_CHECK;
2574		2874
2575	wlist_del (&anfds[w->fd].head, (WL)w);	2875	wlist_del (&anfds[w->fd].head, (WL)w);
2576	ev_stop (EV_A_ (W)w);	2876	ev_stop (EV_A_ (W)w);
2577		2877
2578	fd_change (EV_A_ w->fd, 1);	2878	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2579		2879
2580	EV_FREQUENT_CHECK;	2880	EV_FREQUENT_CHECK;
2581	}	2881	}
2582		2882
2583	void noinline	2883	void noinline
…		…
2675	if (w->reschedule_cb)	2975	if (w->reschedule_cb)
2676	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2976	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2677	else if (w->interval)	2977	else if (w->interval)
2678	{	2978	{
2679	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2979	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2680	/* this formula differs from the one in periodic_reify because we do not always round up */	2980	periodic_recalc (EV_A_ w);
2681	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2682	}	2981	}
2683	else	2982	else
2684	ev_at (w) = w->offset;	2983	ev_at (w) = w->offset;
2685		2984
2686	EV_FREQUENT_CHECK;	2985	EV_FREQUENT_CHECK;
…		…
2807	sa.sa_handler = ev_sighandler;	3106	sa.sa_handler = ev_sighandler;
2808	sigfillset (&sa.sa_mask);	3107	sigfillset (&sa.sa_mask);
2809	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3108	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810	sigaction (w->signum, &sa, 0);	3109	sigaction (w->signum, &sa, 0);
2811		3110
		3111	if (origflags & EVFLAG_NOSIGMASK)
		3112	{
2812	sigemptyset (&sa.sa_mask);	3113	sigemptyset (&sa.sa_mask);
2813	sigaddset (&sa.sa_mask, w->signum);	3114	sigaddset (&sa.sa_mask, w->signum);
2814	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3115	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3116	}
2815	#endif	3117	#endif
2816	}	3118	}
2817		3119
2818	EV_FREQUENT_CHECK;	3120	EV_FREQUENT_CHECK;
2819	}	3121	}
…		…
2960	if (!pend || pend == path)	3262	if (!pend || pend == path)
2961	break;	3263	break;
2962		3264
2963	*pend = 0;	3265	*pend = 0;
2964	w->wd = inotify_add_watch (fs_fd, path, mask);	3266	w->wd = inotify_add_watch (fs_fd, path, mask);
2965	}	3267	}
2966	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3268	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967	}	3269	}
2968	}	3270	}
2969		3271
2970	if (w->wd >= 0)	3272	if (w->wd >= 0)
…		…
3037	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3339	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038	ofs += sizeof (struct inotify_event) + ev->len;	3340	ofs += sizeof (struct inotify_event) + ev->len;
3039	}	3341	}
3040	}	3342	}
3041		3343
3042	inline_size unsigned int
3043	ev_linux_version (void)
3044	{
3045	struct utsname buf;
3046	unsigned int v;
3047	int i;
3048	char *p = buf.release;
3049
3050	if (uname (&buf))
3051	return 0;
3052
3053	for (i = 3+1; --i; )
3054	{
3055	unsigned int c = 0;
3056
3057	for (;;)
3058	{
3059	if (*p >= '0' && *p <= '9')
3060	c = c * 10 + *p++ - '0';
3061	else
3062	{
3063	p += *p == '.';
3064	break;
3065	}
3066	}
3067
3068	v = (v << 8) | c;
3069	}
3070
3071	return v;
3072	}
3073
3074	inline_size void	3344	inline_size void ecb_cold
3075	ev_check_2625 (EV_P)	3345	ev_check_2625 (EV_P)
3076	{	3346	{
3077	/* kernels < 2.6.25 are borked	3347	/* kernels < 2.6.25 are borked
3078	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3348	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079	*/	3349	*/
…		…
3400		3670
3401	#if EV_EMBED_ENABLE	3671	#if EV_EMBED_ENABLE
3402	void noinline	3672	void noinline
3403	ev_embed_sweep (EV_P_ ev_embed *w)	3673	ev_embed_sweep (EV_P_ ev_embed *w)
3404	{	3674	{
3405	ev_loop (w->other, EVLOOP_NONBLOCK);	3675	ev_run (w->other, EVRUN_NOWAIT);
3406	}	3676	}
3407		3677
3408	static void	3678	static void
3409	embed_io_cb (EV_P_ ev_io *io, int revents)	3679	embed_io_cb (EV_P_ ev_io *io, int revents)
3410	{	3680	{
3411	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3681	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412		3682
3413	if (ev_cb (w))	3683	if (ev_cb (w))
3414	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3684	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415	else	3685	else
3416	ev_loop (w->other, EVLOOP_NONBLOCK);	3686	ev_run (w->other, EVRUN_NOWAIT);
3417	}	3687	}
3418		3688
3419	static void	3689	static void
3420	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3690	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421	{	3691	{
…		…
3425	EV_P = w->other;	3695	EV_P = w->other;
3426		3696
3427	while (fdchangecnt)	3697	while (fdchangecnt)
3428	{	3698	{
3429	fd_reify (EV_A);	3699	fd_reify (EV_A);
3430	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3700	ev_run (EV_A_ EVRUN_NOWAIT);
3431	}	3701	}
3432	}	3702	}
3433	}	3703	}
3434		3704
3435	static void	3705	static void
…		…
3441		3711
3442	{	3712	{
3443	EV_P = w->other;	3713	EV_P = w->other;
3444		3714
3445	ev_loop_fork (EV_A);	3715	ev_loop_fork (EV_A);
3446	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3716	ev_run (EV_A_ EVRUN_NOWAIT);
3447	}	3717	}
3448		3718
3449	ev_embed_start (EV_A_ w);	3719	ev_embed_start (EV_A_ w);
3450	}	3720	}
3451		3721
…		…
3543		3813
3544	EV_FREQUENT_CHECK;	3814	EV_FREQUENT_CHECK;
3545	}	3815	}
3546	#endif	3816	#endif
3547		3817
		3818	#if EV_CLEANUP_ENABLE
		3819	void
		3820	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3821	{
		3822	if (expect_false (ev_is_active (w)))
		3823	return;
		3824
		3825	EV_FREQUENT_CHECK;
		3826
		3827	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3828	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3829	cleanups [cleanupcnt - 1] = w;
		3830
		3831	/* cleanup watchers should never keep a refcount on the loop */
		3832	ev_unref (EV_A);
		3833	EV_FREQUENT_CHECK;
		3834	}
		3835
		3836	void
		3837	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3838	{
		3839	clear_pending (EV_A_ (W)w);
		3840	if (expect_false (!ev_is_active (w)))
		3841	return;
		3842
		3843	EV_FREQUENT_CHECK;
		3844	ev_ref (EV_A);
		3845
		3846	{
		3847	int active = ev_active (w);
		3848
		3849	cleanups [active - 1] = cleanups [--cleanupcnt];
		3850	ev_active (cleanups [active - 1]) = active;
		3851	}
		3852
		3853	ev_stop (EV_A_ (W)w);
		3854
		3855	EV_FREQUENT_CHECK;
		3856	}
		3857	#endif
		3858
3548	#if EV_ASYNC_ENABLE	3859	#if EV_ASYNC_ENABLE
3549	void	3860	void
3550	ev_async_start (EV_P_ ev_async *w)	3861	ev_async_start (EV_P_ ev_async *w)
3551	{	3862	{
3552	if (expect_false (ev_is_active (w)))	3863	if (expect_false (ev_is_active (w)))
3553	return;	3864	return;
		3865
		3866	w->sent = 0;
3554		3867
3555	evpipe_init (EV_A);	3868	evpipe_init (EV_A);
3556		3869
3557	EV_FREQUENT_CHECK;	3870	EV_FREQUENT_CHECK;
3558		3871
…		…
3636	{	3949	{
3637	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3950	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3638		3951
3639	if (expect_false (!once))	3952	if (expect_false (!once))
3640	{	3953	{
3641	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3954	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3642	return;	3955	return;
3643	}	3956	}
3644		3957
3645	once->cb = cb;	3958	once->cb = cb;
3646	once->arg = arg;	3959	once->arg = arg;
…		…
3661	}	3974	}
3662		3975
3663	/*****************************************************************************/	3976	/*****************************************************************************/
3664		3977
3665	#if EV_WALK_ENABLE	3978	#if EV_WALK_ENABLE
3666	void	3979	void ecb_cold
3667	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))	3980	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668	{	3981	{
3669	int i, j;	3982	int i, j;
3670	ev_watcher_list *wl, *wn;	3983	ev_watcher_list *wl, *wn;
3671		3984
…		…
3778		4091
3779	#if EV_MULTIPLICITY	4092	#if EV_MULTIPLICITY
3780	#include "ev_wrap.h"	4093	#include "ev_wrap.h"
3781	#endif	4094	#endif
3782		4095
3783	#ifdef __cplusplus	4096	EV_CPP(})
3784	}
3785	#endif
3786		4097

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