ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.339 by root, Tue Mar 16 00:43:22 2010 UTC vs.
Revision 1.380 by root, Mon Jun 27 19:20:01 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_loop_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
467	#endif
468		496
		497	#if ECB_GCC_VERSION(3,1)
		498	#define ecb_attribute(attrlist) __attribute__(attrlist)
		499	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		500	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		501	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		502	#else
		503	#define ecb_attribute(attrlist)
		504	#define ecb_is_constant(expr) 0
		505	#define ecb_expect(expr,value) (expr)
		506	#define ecb_prefetch(addr,rw,locality)
		507	#endif
		508
		509	#define ecb_noinline ecb_attribute ((__noinline__))
		510	#define ecb_noreturn ecb_attribute ((__noreturn__))
		511	#define ecb_unused ecb_attribute ((__unused__))
		512	#define ecb_const ecb_attribute ((__const__))
		513	#define ecb_pure ecb_attribute ((__pure__))
		514
		515	#if ECB_GCC_VERSION(4,3)
		516	#define ecb_artificial ecb_attribute ((__artificial__))
		517	#define ecb_hot ecb_attribute ((__hot__))
		518	#define ecb_cold ecb_attribute ((__cold__))
		519	#else
		520	#define ecb_artificial
		521	#define ecb_hot
		522	#define ecb_cold
		523	#endif
		524
		525	/* put around conditional expressions if you are very sure that the */
		526	/* expression is mostly true or mostly false. note that these return */
		527	/* booleans, not the expression. */
469	#define expect_false(expr) expect ((expr) != 0, 0)	528	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470	#define expect_true(expr) expect ((expr) != 0, 1)	529	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		530	/* ecb.h end */
		531
		532	#define expect_false(cond) ecb_expect_false (cond)
		533	#define expect_true(cond) ecb_expect_true (cond)
		534	#define noinline ecb_noinline
		535
471	#define inline_size static inline	536	#define inline_size ecb_inline
472		537
473	#if EV_FEATURE_CODE	538	#if EV_FEATURE_CODE
474	# define inline_speed static inline	539	# define inline_speed ecb_inline
475	#else	540	#else
476	# define inline_speed static noinline	541	# define inline_speed static noinline
477	#endif	542	#endif
478		543
479	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	544	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
494	#define ev_active(w) ((W)(w))->active	559	#define ev_active(w) ((W)(w))->active
495	#define ev_at(w) ((WT)(w))->at	560	#define ev_at(w) ((WT)(w))->at
496		561
497	#if EV_USE_REALTIME	562	#if EV_USE_REALTIME
498	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	563	/* 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 */	564	/* giving it a reasonably high chance of working on typical architectures */
500	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */	565	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501	#endif	566	#endif
502		567
503	#if EV_USE_MONOTONIC	568	#if EV_USE_MONOTONIC
504	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	569	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
…		…
518	# include "ev_win32.c"	583	# include "ev_win32.c"
519	#endif	584	#endif
520		585
521	/*****************************************************************************/	586	/*****************************************************************************/
522		587
		588	/* define a suitable floor function (only used by periodics atm) */
		589
		590	#if EV_USE_FLOOR
		591	# include <math.h>
		592	# define ev_floor(v) floor (v)
		593	#else
		594
		595	#include <float.h>
		596
		597	/* a floor() replacement function, should be independent of ev_tstamp type */
		598	static ev_tstamp noinline
		599	ev_floor (ev_tstamp v)
		600	{
		601	/* the choice of shift factor is not terribly important */
		602	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		603	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		604	#else
		605	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		606	#endif
		607
		608	/* argument too large for an unsigned long? */
		609	if (expect_false (v >= shift))
		610	{
		611	ev_tstamp f;
		612
		613	if (v == v - 1.)
		614	return v; /* very large number */
		615
		616	f = shift * ev_floor (v * (1. / shift));
		617	return f + ev_floor (v - f);
		618	}
		619
		620	/* special treatment for negative args? */
		621	if (expect_false (v < 0.))
		622	{
		623	ev_tstamp f = -ev_floor (-v);
		624
		625	return f - (f == v ? 0 : 1);
		626	}
		627
		628	/* fits into an unsigned long */
		629	return (unsigned long)v;
		630	}
		631
		632	#endif
		633
		634	/*****************************************************************************/
		635
		636	#ifdef __linux
		637	# include <sys/utsname.h>
		638	#endif
		639
		640	static unsigned int noinline ecb_cold
		641	ev_linux_version (void)
		642	{
		643	#ifdef __linux
		644	unsigned int v = 0;
		645	struct utsname buf;
		646	int i;
		647	char *p = buf.release;
		648
		649	if (uname (&buf))
		650	return 0;
		651
		652	for (i = 3+1; --i; )
		653	{
		654	unsigned int c = 0;
		655
		656	for (;;)
		657	{
		658	if (*p >= '0' && *p <= '9')
		659	c = c * 10 + *p++ - '0';
		660	else
		661	{
		662	p += *p == '.';
		663	break;
		664	}
		665	}
		666
		667	v = (v << 8) | c;
		668	}
		669
		670	return v;
		671	#else
		672	return 0;
		673	#endif
		674	}
		675
		676	/*****************************************************************************/
		677
523	#if EV_AVOID_STDIO	678	#if EV_AVOID_STDIO
524	static void noinline	679	static void noinline ecb_cold
525	ev_printerr (const char *msg)	680	ev_printerr (const char *msg)
526	{	681	{
527	write (STDERR_FILENO, msg, strlen (msg));	682	write (STDERR_FILENO, msg, strlen (msg));
528	}	683	}
529	#endif	684	#endif
530		685
531	static void (*syserr_cb)(const char *msg);	686	static void (*syserr_cb)(const char *msg);
532		687
533	void	688	void ecb_cold
534	ev_set_syserr_cb (void (*cb)(const char *msg))	689	ev_set_syserr_cb (void (*cb)(const char *msg))
535	{	690	{
536	syserr_cb = cb;	691	syserr_cb = cb;
537	}	692	}
538		693
539	static void noinline	694	static void noinline ecb_cold
540	ev_syserr (const char *msg)	695	ev_syserr (const char *msg)
541	{	696	{
542	if (!msg)	697	if (!msg)
543	msg = "(libev) system error";	698	msg = "(libev) system error";
544		699
545	if (syserr_cb)	700	if (syserr_cb)
546	syserr_cb (msg);	701	syserr_cb (msg);
547	else	702	else
548	{	703	{
549	#if EV_AVOID_STDIO	704	#if EV_AVOID_STDIO
550	const char *err = strerror (errno);
551
552	ev_printerr (msg);	705	ev_printerr (msg);
553	ev_printerr (": ");	706	ev_printerr (": ");
554	ev_printerr (err);	707	ev_printerr (strerror (errno));
555	ev_printerr ("\n");	708	ev_printerr ("\n");
556	#else	709	#else
557	perror (msg);	710	perror (msg);
558	#endif	711	#endif
559	abort ();	712	abort ();
…		…
579	#endif	732	#endif
580	}	733	}
581		734
582	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	735	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583		736
584	void	737	void ecb_cold
585	ev_set_allocator (void *(*cb)(void *ptr, long size))	738	ev_set_allocator (void *(*cb)(void *ptr, long size))
586	{	739	{
587	alloc = cb;	740	alloc = cb;
588	}	741	}
589		742
…		…
593	ptr = alloc (ptr, size);	746	ptr = alloc (ptr, size);
594		747
595	if (!ptr && size)	748	if (!ptr && size)
596	{	749	{
597	#if EV_AVOID_STDIO	750	#if EV_AVOID_STDIO
598	ev_printerr ("libev: memory allocation failed, aborting.\n");	751	ev_printerr ("(libev) memory allocation failed, aborting.\n");
599	#else	752	#else
600	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	753	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601	#endif	754	#endif
602	abort ();	755	abort ();
603	}	756	}
604		757
605	return ptr;	758	return ptr;
…		…
622	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	775	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623	unsigned char unused;	776	unsigned char unused;
624	#if EV_USE_EPOLL	777	#if EV_USE_EPOLL
625	unsigned int egen; /* generation counter to counter epoll bugs */	778	unsigned int egen; /* generation counter to counter epoll bugs */
626	#endif	779	#endif
627	#if EV_SELECT_IS_WINSOCKET	780	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628	SOCKET handle;	781	SOCKET handle;
		782	#endif
		783	#if EV_USE_IOCP
		784	OVERLAPPED or, ow;
629	#endif	785	#endif
630	} ANFD;	786	} ANFD;
631		787
632	/* stores the pending event set for a given watcher */	788	/* stores the pending event set for a given watcher */
633	typedef struct	789	typedef struct
…		…
698	# define EV_RELEASE_CB (void)0	854	# define EV_RELEASE_CB (void)0
699	# define EV_ACQUIRE_CB (void)0	855	# define EV_ACQUIRE_CB (void)0
700	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	856	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701	#endif	857	#endif
702		858
703	#define EVUNLOOP_RECURSE 0x80	859	#define EVBREAK_RECURSE 0x80
704		860
705	/*****************************************************************************/	861	/*****************************************************************************/
706		862
707	#ifndef EV_HAVE_EV_TIME	863	#ifndef EV_HAVE_EV_TIME
708	ev_tstamp	864	ev_tstamp
…		…
752	if (delay > 0.)	908	if (delay > 0.)
753	{	909	{
754	#if EV_USE_NANOSLEEP	910	#if EV_USE_NANOSLEEP
755	struct timespec ts;	911	struct timespec ts;
756		912
757	ts.tv_sec = (time_t)delay;	913	EV_TS_SET (ts, delay);
758	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760	nanosleep (&ts, 0);	914	nanosleep (&ts, 0);
761	#elif defined(_WIN32)	915	#elif defined(_WIN32)
762	Sleep ((unsigned long)(delay * 1e3));	916	Sleep ((unsigned long)(delay * 1e3));
763	#else	917	#else
764	struct timeval tv;	918	struct timeval tv;
765		919
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 */	920	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770	/* something not guaranteed by newer posix versions, but guaranteed */	921	/* something not guaranteed by newer posix versions, but guaranteed */
771	/* by older ones */	922	/* by older ones */
		923	EV_TV_SET (tv, delay);
772	select (0, 0, 0, 0, &tv);	924	select (0, 0, 0, 0, &tv);
773	#endif	925	#endif
774	}	926	}
775	}	927	}
776		928
777	/*****************************************************************************/	929	/*****************************************************************************/
778		930
779	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	931	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780		932
781	/* find a suitable new size for the given array, */	933	/* find a suitable new size for the given array, */
782	/* hopefully by rounding to a ncie-to-malloc size */	934	/* hopefully by rounding to a nice-to-malloc size */
783	inline_size int	935	inline_size int
784	array_nextsize (int elem, int cur, int cnt)	936	array_nextsize (int elem, int cur, int cnt)
785	{	937	{
786	int ncur = cur + 1;	938	int ncur = cur + 1;
787		939
…		…
799	}	951	}
800		952
801	return ncur;	953	return ncur;
802	}	954	}
803		955
804	static noinline void *	956	static void * noinline ecb_cold
805	array_realloc (int elem, void *base, int *cur, int cnt)	957	array_realloc (int elem, void *base, int *cur, int cnt)
806	{	958	{
807	*cur = array_nextsize (elem, *cur, cnt);	959	*cur = array_nextsize (elem, *cur, cnt);
808	return ev_realloc (base, elem * *cur);	960	return ev_realloc (base, elem * *cur);
809	}	961	}
…		…
922	inline_size void	1074	inline_size void
923	fd_reify (EV_P)	1075	fd_reify (EV_P)
924	{	1076	{
925	int i;	1077	int i;
926		1078
		1079	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		1080	for (i = 0; i < fdchangecnt; ++i)
		1081	{
		1082	int fd = fdchanges [i];
		1083	ANFD *anfd = anfds + fd;
		1084
		1085	if (anfd->reify & EV__IOFDSET && anfd->head)
		1086	{
		1087	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1088
		1089	if (handle != anfd->handle)
		1090	{
		1091	unsigned long arg;
		1092
		1093	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1094
		1095	/* handle changed, but fd didn't - we need to do it in two steps */
		1096	backend_modify (EV_A_ fd, anfd->events, 0);
		1097	anfd->events = 0;
		1098	anfd->handle = handle;
		1099	}
		1100	}
		1101	}
		1102	#endif
		1103
927	for (i = 0; i < fdchangecnt; ++i)	1104	for (i = 0; i < fdchangecnt; ++i)
928	{	1105	{
929	int fd = fdchanges [i];	1106	int fd = fdchanges [i];
930	ANFD *anfd = anfds + fd;	1107	ANFD *anfd = anfds + fd;
931	ev_io *w;	1108	ev_io *w;
932		1109
933	unsigned char events = 0;	1110	unsigned char o_events = anfd->events;
		1111	unsigned char o_reify = anfd->reify;
934		1112
935	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1113	anfd->reify = 0;
936	events |= (unsigned char)w->events;
937		1114
938	#if EV_SELECT_IS_WINSOCKET	1115	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939	if (events)
940	{	1116	{
941	unsigned long arg;	1117	anfd->events = 0;
942	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1118
943	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1119	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		1120	anfd->events |= (unsigned char)w->events;
		1121
		1122	if (o_events != anfd->events)
		1123	o_reify = EV__IOFDSET; /* actually |= */
944	}	1124	}
945	#endif
946		1125
947	{	1126	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);	1127	backend_modify (EV_A_ fd, o_events, anfd->events);
956	}
957	}	1128	}
958		1129
959	fdchangecnt = 0;	1130	fdchangecnt = 0;
960	}	1131	}
961		1132
…		…
973	fdchanges [fdchangecnt - 1] = fd;	1144	fdchanges [fdchangecnt - 1] = fd;
974	}	1145	}
975	}	1146	}
976		1147
977	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1148	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978	inline_speed void	1149	inline_speed void ecb_cold
979	fd_kill (EV_P_ int fd)	1150	fd_kill (EV_P_ int fd)
980	{	1151	{
981	ev_io *w;	1152	ev_io *w;
982		1153
983	while ((w = (ev_io *)anfds [fd].head))	1154	while ((w = (ev_io *)anfds [fd].head))
…		…
986	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1157	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987	}	1158	}
988	}	1159	}
989		1160
990	/* check whether the given fd is actually valid, for error recovery */	1161	/* check whether the given fd is actually valid, for error recovery */
991	inline_size int	1162	inline_size int ecb_cold
992	fd_valid (int fd)	1163	fd_valid (int fd)
993	{	1164	{
994	#ifdef _WIN32	1165	#ifdef _WIN32
995	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1166	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996	#else	1167	#else
997	return fcntl (fd, F_GETFD) != -1;	1168	return fcntl (fd, F_GETFD) != -1;
998	#endif	1169	#endif
999	}	1170	}
1000		1171
1001	/* called on EBADF to verify fds */	1172	/* called on EBADF to verify fds */
1002	static void noinline	1173	static void noinline ecb_cold
1003	fd_ebadf (EV_P)	1174	fd_ebadf (EV_P)
1004	{	1175	{
1005	int fd;	1176	int fd;
1006		1177
1007	for (fd = 0; fd < anfdmax; ++fd)	1178	for (fd = 0; fd < anfdmax; ++fd)
…		…
1009	if (!fd_valid (fd) && errno == EBADF)	1180	if (!fd_valid (fd) && errno == EBADF)
1010	fd_kill (EV_A_ fd);	1181	fd_kill (EV_A_ fd);
1011	}	1182	}
1012		1183
1013	/* called on ENOMEM in select/poll to kill some fds and retry */	1184	/* called on ENOMEM in select/poll to kill some fds and retry */
1014	static void noinline	1185	static void noinline ecb_cold
1015	fd_enomem (EV_P)	1186	fd_enomem (EV_P)
1016	{	1187	{
1017	int fd;	1188	int fd;
1018		1189
1019	for (fd = anfdmax; fd--; )	1190	for (fd = anfdmax; fd--; )
…		…
1054	}	1225	}
1055		1226
1056	/*****************************************************************************/	1227	/*****************************************************************************/
1057		1228
1058	/*	1229	/*
1059	* the heap functions want a real array index. array index 0 uis guaranteed to not	1230	* 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	1231	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061	* the branching factor of the d-tree.	1232	* the branching factor of the d-tree.
1062	*/	1233	*/
1063		1234
1064	/*	1235	/*
…		…
1214		1385
1215	/*****************************************************************************/	1386	/*****************************************************************************/
1216		1387
1217	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE	1388	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218		1389
1219	static void noinline	1390	static void noinline ecb_cold
1220	evpipe_init (EV_P)	1391	evpipe_init (EV_P)
1221	{	1392	{
1222	if (!ev_is_active (&pipe_w))	1393	if (!ev_is_active (&pipe_w))
1223	{	1394	{
1224	# if EV_USE_EVENTFD	1395	# if EV_USE_EVENTFD
…		…
1246	ev_io_start (EV_A_ &pipe_w);	1417	ev_io_start (EV_A_ &pipe_w);
1247	ev_unref (EV_A); /* watcher should not keep loop alive */	1418	ev_unref (EV_A); /* watcher should not keep loop alive */
1248	}	1419	}
1249	}	1420	}
1250		1421
1251	inline_size void	1422	inline_speed void
1252	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1423	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253	{	1424	{
1254	if (!*flag)	1425	if (!*flag)
1255	{	1426	{
1256	int old_errno = errno; /* save errno because write might clobber it */
1257	char dummy;
1258
1259	*flag = 1;	1427	*flag = 1;
1260		1428
		1429	pipe_write_skipped = 1;
		1430
		1431	if (pipe_write_wanted)
		1432	{
		1433	int old_errno;
		1434
		1435	pipe_write_skipped = 0;
		1436
		1437	old_errno = errno; /* save errno because write will clobber it */
		1438
1261	#if EV_USE_EVENTFD	1439	#if EV_USE_EVENTFD
1262	if (evfd >= 0)	1440	if (evfd >= 0)
1263	{	1441	{
1264	uint64_t counter = 1;	1442	uint64_t counter = 1;
1265	write (evfd, &counter, sizeof (uint64_t));	1443	write (evfd, &counter, sizeof (uint64_t));
		1444	}
		1445	else
		1446	#endif
		1447	{
		1448	/* win32 people keep sending patches that change this write() to send() */
		1449	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1450	/* so when you think this write should be a send instead, please find out */
		1451	/* where your send() is from - it's definitely not the microsoft send, and */
		1452	/* tell me. thank you. */
		1453	write (evpipe [1], &(evpipe [1]), 1);
		1454	}
		1455
		1456	errno = old_errno;
1266	}	1457	}
1267	else
1268	#endif
1269	write (evpipe [1], &dummy, 1);
1270
1271	errno = old_errno;
1272	}	1458	}
1273	}	1459	}
1274		1460
1275	/* called whenever the libev signal pipe */	1461	/* called whenever the libev signal pipe */
1276	/* got some events (signal, async) */	1462	/* got some events (signal, async) */
1277	static void	1463	static void
1278	pipecb (EV_P_ ev_io *iow, int revents)	1464	pipecb (EV_P_ ev_io *iow, int revents)
1279	{	1465	{
1280	int i;	1466	int i;
1281		1467
		1468	if (revents & EV_READ)
		1469	{
1282	#if EV_USE_EVENTFD	1470	#if EV_USE_EVENTFD
1283	if (evfd >= 0)	1471	if (evfd >= 0)
1284	{	1472	{
1285	uint64_t counter;	1473	uint64_t counter;
1286	read (evfd, &counter, sizeof (uint64_t));	1474	read (evfd, &counter, sizeof (uint64_t));
1287	}	1475	}
1288	else	1476	else
1289	#endif	1477	#endif
1290	{	1478	{
1291	char dummy;	1479	char dummy;
		1480	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1292	read (evpipe [0], &dummy, 1);	1481	read (evpipe [0], &dummy, 1);
		1482	}
1293	}	1483	}
1294		1484
		1485	pipe_write_skipped = 0;
		1486
		1487	#if EV_SIGNAL_ENABLE
1295	if (sig_pending)	1488	if (sig_pending)
1296	{	1489	{
1297	sig_pending = 0;	1490	sig_pending = 0;
1298		1491
1299	for (i = EV_NSIG - 1; i--; )	1492	for (i = EV_NSIG - 1; i--; )
1300	if (expect_false (signals [i].pending))	1493	if (expect_false (signals [i].pending))
1301	ev_feed_signal_event (EV_A_ i + 1);	1494	ev_feed_signal_event (EV_A_ i + 1);
1302	}	1495	}
		1496	#endif
1303		1497
1304	#if EV_ASYNC_ENABLE	1498	#if EV_ASYNC_ENABLE
1305	if (async_pending)	1499	if (async_pending)
1306	{	1500	{
1307	async_pending = 0;	1501	async_pending = 0;
…		…
1316	#endif	1510	#endif
1317	}	1511	}
1318		1512
1319	/*****************************************************************************/	1513	/*****************************************************************************/
1320		1514
		1515	void
		1516	ev_feed_signal (int signum)
		1517	{
		1518	#if EV_MULTIPLICITY
		1519	EV_P = signals [signum - 1].loop;
		1520
		1521	if (!EV_A)
		1522	return;
		1523	#endif
		1524
		1525	evpipe_init (EV_A);
		1526
		1527	signals [signum - 1].pending = 1;
		1528	evpipe_write (EV_A_ &sig_pending);
		1529	}
		1530
1321	static void	1531	static void
1322	ev_sighandler (int signum)	1532	ev_sighandler (int signum)
1323	{	1533	{
1324	#if EV_MULTIPLICITY
1325	EV_P = signals [signum - 1].loop;
1326	#endif
1327
1328	#ifdef _WIN32	1534	#ifdef _WIN32
1329	signal (signum, ev_sighandler);	1535	signal (signum, ev_sighandler);
1330	#endif	1536	#endif
1331		1537
1332	signals [signum - 1].pending = 1;	1538	ev_feed_signal (signum);
1333	evpipe_write (EV_A_ &sig_pending);
1334	}	1539	}
1335		1540
1336	void noinline	1541	void noinline
1337	ev_feed_signal_event (EV_P_ int signum)	1542	ev_feed_signal_event (EV_P_ int signum)
1338	{	1543	{
…		…
1438		1643
1439	#endif	1644	#endif
1440		1645
1441	/*****************************************************************************/	1646	/*****************************************************************************/
1442		1647
		1648	#if EV_USE_IOCP
		1649	# include "ev_iocp.c"
		1650	#endif
1443	#if EV_USE_PORT	1651	#if EV_USE_PORT
1444	# include "ev_port.c"	1652	# include "ev_port.c"
1445	#endif	1653	#endif
1446	#if EV_USE_KQUEUE	1654	#if EV_USE_KQUEUE
1447	# include "ev_kqueue.c"	1655	# include "ev_kqueue.c"
…		…
1454	#endif	1662	#endif
1455	#if EV_USE_SELECT	1663	#if EV_USE_SELECT
1456	# include "ev_select.c"	1664	# include "ev_select.c"
1457	#endif	1665	#endif
1458		1666
1459	int	1667	int ecb_cold
1460	ev_version_major (void)	1668	ev_version_major (void)
1461	{	1669	{
1462	return EV_VERSION_MAJOR;	1670	return EV_VERSION_MAJOR;
1463	}	1671	}
1464		1672
1465	int	1673	int ecb_cold
1466	ev_version_minor (void)	1674	ev_version_minor (void)
1467	{	1675	{
1468	return EV_VERSION_MINOR;	1676	return EV_VERSION_MINOR;
1469	}	1677	}
1470		1678
1471	/* return true if we are running with elevated privileges and should ignore env variables */	1679	/* return true if we are running with elevated privileges and should ignore env variables */
1472	int inline_size	1680	int inline_size ecb_cold
1473	enable_secure (void)	1681	enable_secure (void)
1474	{	1682	{
1475	#ifdef _WIN32	1683	#ifdef _WIN32
1476	return 0;	1684	return 0;
1477	#else	1685	#else
1478	return getuid () != geteuid ()	1686	return getuid () != geteuid ()
1479	|| getgid () != getegid ();	1687	|| getgid () != getegid ();
1480	#endif	1688	#endif
1481	}	1689	}
1482		1690
1483	unsigned int	1691	unsigned int ecb_cold
1484	ev_supported_backends (void)	1692	ev_supported_backends (void)
1485	{	1693	{
1486	unsigned int flags = 0;	1694	unsigned int flags = 0;
1487		1695
1488	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	1696	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
…		…
1492	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;	1700	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493		1701
1494	return flags;	1702	return flags;
1495	}	1703	}
1496		1704
1497	unsigned int	1705	unsigned int ecb_cold
1498	ev_recommended_backends (void)	1706	ev_recommended_backends (void)
1499	{	1707	{
1500	unsigned int flags = ev_supported_backends ();	1708	unsigned int flags = ev_supported_backends ();
1501		1709
1502	#ifndef __NetBSD__	1710	#ifndef __NetBSD__
…		…
1507	#ifdef __APPLE__	1715	#ifdef __APPLE__
1508	/* only select works correctly on that "unix-certified" platform */	1716	/* only select works correctly on that "unix-certified" platform */
1509	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */	1717	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */	1718	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511	#endif	1719	#endif
		1720	#ifdef __FreeBSD__
		1721	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
		1722	#endif
1512		1723
1513	return flags;	1724	return flags;
1514	}	1725	}
1515		1726
1516	unsigned int	1727	unsigned int ecb_cold
1517	ev_embeddable_backends (void)	1728	ev_embeddable_backends (void)
1518	{	1729	{
1519	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	1730	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520		1731
1521	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1732	/* 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 */	1733	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1523	flags &= ~EVBACKEND_EPOLL;	1734	flags &= ~EVBACKEND_EPOLL;
1524		1735
1525	return flags;	1736	return flags;
1526	}	1737	}
1527		1738
1528	unsigned int	1739	unsigned int
…		…
1531	return backend;	1742	return backend;
1532	}	1743	}
1533		1744
1534	#if EV_FEATURE_API	1745	#if EV_FEATURE_API
1535	unsigned int	1746	unsigned int
1536	ev_loop_count (EV_P)	1747	ev_iteration (EV_P)
1537	{	1748	{
1538	return loop_count;	1749	return loop_count;
1539	}	1750	}
1540		1751
1541	unsigned int	1752	unsigned int
1542	ev_loop_depth (EV_P)	1753	ev_depth (EV_P)
1543	{	1754	{
1544	return loop_depth;	1755	return loop_depth;
1545	}	1756	}
1546		1757
1547	void	1758	void
…		…
1566	ev_userdata (EV_P)	1777	ev_userdata (EV_P)
1567	{	1778	{
1568	return userdata;	1779	return userdata;
1569	}	1780	}
1570		1781
		1782	void
1571	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1783	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572	{	1784	{
1573	invoke_cb = invoke_pending_cb;	1785	invoke_cb = invoke_pending_cb;
1574	}	1786	}
1575		1787
		1788	void
1576	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))	1789	ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577	{	1790	{
1578	release_cb = release;	1791	release_cb = release;
1579	acquire_cb = acquire;	1792	acquire_cb = acquire;
1580	}	1793	}
1581	#endif	1794	#endif
1582		1795
1583	/* initialise a loop structure, must be zero-initialised */	1796	/* initialise a loop structure, must be zero-initialised */
1584	static void noinline	1797	static void noinline ecb_cold
1585	loop_init (EV_P_ unsigned int flags)	1798	loop_init (EV_P_ unsigned int flags)
1586	{	1799	{
1587	if (!backend)	1800	if (!backend)
1588	{	1801	{
		1802	origflags = flags;
		1803
1589	#if EV_USE_REALTIME	1804	#if EV_USE_REALTIME
1590	if (!have_realtime)	1805	if (!have_realtime)
1591	{	1806	{
1592	struct timespec ts;	1807	struct timespec ts;
1593		1808
…		…
1615	if (!(flags & EVFLAG_NOENV)	1830	if (!(flags & EVFLAG_NOENV)
1616	&& !enable_secure ()	1831	&& !enable_secure ()
1617	&& getenv ("LIBEV_FLAGS"))	1832	&& getenv ("LIBEV_FLAGS"))
1618	flags = atoi (getenv ("LIBEV_FLAGS"));	1833	flags = atoi (getenv ("LIBEV_FLAGS"));
1619		1834
1620	ev_rt_now = ev_time ();	1835	ev_rt_now = ev_time ();
1621	mn_now = get_clock ();	1836	mn_now = get_clock ();
1622	now_floor = mn_now;	1837	now_floor = mn_now;
1623	rtmn_diff = ev_rt_now - mn_now;	1838	rtmn_diff = ev_rt_now - mn_now;
1624	#if EV_FEATURE_API	1839	#if EV_FEATURE_API
1625	invoke_cb = ev_invoke_pending;	1840	invoke_cb = ev_invoke_pending;
1626	#endif	1841	#endif
1627		1842
1628	io_blocktime = 0.;	1843	io_blocktime = 0.;
1629	timeout_blocktime = 0.;	1844	timeout_blocktime = 0.;
1630	backend = 0;	1845	backend = 0;
1631	backend_fd = -1;	1846	backend_fd = -1;
1632	sig_pending = 0;	1847	sig_pending = 0;
1633	#if EV_ASYNC_ENABLE	1848	#if EV_ASYNC_ENABLE
1634	async_pending = 0;	1849	async_pending = 0;
1635	#endif	1850	#endif
		1851	pipe_write_skipped = 0;
		1852	pipe_write_wanted = 0;
1636	#if EV_USE_INOTIFY	1853	#if EV_USE_INOTIFY
1637	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1854	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638	#endif	1855	#endif
1639	#if EV_USE_SIGNALFD	1856	#if EV_USE_SIGNALFD
1640	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1857	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641	#endif	1858	#endif
1642		1859
1643	if (!(flags & 0x0000ffffU))	1860	if (!(flags & EVBACKEND_MASK))
1644	flags |= ev_recommended_backends ();	1861	flags |= ev_recommended_backends ();
1645		1862
		1863	#if EV_USE_IOCP
		1864	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1865	#endif
1646	#if EV_USE_PORT	1866	#if EV_USE_PORT
1647	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1867	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648	#endif	1868	#endif
1649	#if EV_USE_KQUEUE	1869	#if EV_USE_KQUEUE
1650	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1870	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1667	#endif	1887	#endif
1668	}	1888	}
1669	}	1889	}
1670		1890
1671	/* free up a loop structure */	1891	/* free up a loop structure */
1672	static void noinline	1892	void ecb_cold
1673	loop_destroy (EV_P)	1893	ev_loop_destroy (EV_P)
1674	{	1894	{
1675	int i;	1895	int i;
		1896
		1897	#if EV_MULTIPLICITY
		1898	/* mimic free (0) */
		1899	if (!EV_A)
		1900	return;
		1901	#endif
		1902
		1903	#if EV_CLEANUP_ENABLE
		1904	/* queue cleanup watchers (and execute them) */
		1905	if (expect_false (cleanupcnt))
		1906	{
		1907	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1908	EV_INVOKE_PENDING;
		1909	}
		1910	#endif
		1911
		1912	#if EV_CHILD_ENABLE
		1913	if (ev_is_active (&childev))
		1914	{
		1915	ev_ref (EV_A); /* child watcher */
		1916	ev_signal_stop (EV_A_ &childev);
		1917	}
		1918	#endif
1676		1919
1677	if (ev_is_active (&pipe_w))	1920	if (ev_is_active (&pipe_w))
1678	{	1921	{
1679	/*ev_ref (EV_A);*/	1922	/*ev_ref (EV_A);*/
1680	/*ev_io_stop (EV_A_ &pipe_w);*/	1923	/*ev_io_stop (EV_A_ &pipe_w);*/
…		…
1702	#endif	1945	#endif
1703		1946
1704	if (backend_fd >= 0)	1947	if (backend_fd >= 0)
1705	close (backend_fd);	1948	close (backend_fd);
1706		1949
		1950	#if EV_USE_IOCP
		1951	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1952	#endif
1707	#if EV_USE_PORT	1953	#if EV_USE_PORT
1708	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1954	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709	#endif	1955	#endif
1710	#if EV_USE_KQUEUE	1956	#if EV_USE_KQUEUE
1711	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1957	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1738	array_free (periodic, EMPTY);	1984	array_free (periodic, EMPTY);
1739	#endif	1985	#endif
1740	#if EV_FORK_ENABLE	1986	#if EV_FORK_ENABLE
1741	array_free (fork, EMPTY);	1987	array_free (fork, EMPTY);
1742	#endif	1988	#endif
		1989	#if EV_CLEANUP_ENABLE
		1990	array_free (cleanup, EMPTY);
		1991	#endif
1743	array_free (prepare, EMPTY);	1992	array_free (prepare, EMPTY);
1744	array_free (check, EMPTY);	1993	array_free (check, EMPTY);
1745	#if EV_ASYNC_ENABLE	1994	#if EV_ASYNC_ENABLE
1746	array_free (async, EMPTY);	1995	array_free (async, EMPTY);
1747	#endif	1996	#endif
1748		1997
1749	backend = 0;	1998	backend = 0;
		1999
		2000	#if EV_MULTIPLICITY
		2001	if (ev_is_default_loop (EV_A))
		2002	#endif
		2003	ev_default_loop_ptr = 0;
		2004	#if EV_MULTIPLICITY
		2005	else
		2006	ev_free (EV_A);
		2007	#endif
1750	}	2008	}
1751		2009
1752	#if EV_USE_INOTIFY	2010	#if EV_USE_INOTIFY
1753	inline_size void infy_fork (EV_P);	2011	inline_size void infy_fork (EV_P);
1754	#endif	2012	#endif
…		…
1769	infy_fork (EV_A);	2027	infy_fork (EV_A);
1770	#endif	2028	#endif
1771		2029
1772	if (ev_is_active (&pipe_w))	2030	if (ev_is_active (&pipe_w))
1773	{	2031	{
1774	/* this "locks" the handlers against writing to the pipe */	2032	/* 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		2033
1781	ev_ref (EV_A);	2034	ev_ref (EV_A);
1782	ev_io_stop (EV_A_ &pipe_w);	2035	ev_io_stop (EV_A_ &pipe_w);
1783		2036
1784	#if EV_USE_EVENTFD	2037	#if EV_USE_EVENTFD
…		…
1802	postfork = 0;	2055	postfork = 0;
1803	}	2056	}
1804		2057
1805	#if EV_MULTIPLICITY	2058	#if EV_MULTIPLICITY
1806		2059
1807	struct ev_loop *	2060	struct ev_loop * ecb_cold
1808	ev_loop_new (unsigned int flags)	2061	ev_loop_new (unsigned int flags)
1809	{	2062	{
1810	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2063	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811		2064
1812	memset (EV_A, 0, sizeof (struct ev_loop));	2065	memset (EV_A, 0, sizeof (struct ev_loop));
1813	loop_init (EV_A_ flags);	2066	loop_init (EV_A_ flags);
1814		2067
1815	if (ev_backend (EV_A))	2068	if (ev_backend (EV_A))
1816	return EV_A;	2069	return EV_A;
1817		2070
		2071	ev_free (EV_A);
1818	return 0;	2072	return 0;
1819	}	2073	}
1820		2074
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 */	2075	#endif /* multiplicity */
1834		2076
1835	#if EV_VERIFY	2077	#if EV_VERIFY
1836	static void noinline	2078	static void noinline ecb_cold
1837	verify_watcher (EV_P_ W w)	2079	verify_watcher (EV_P_ W w)
1838	{	2080	{
1839	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2081	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840		2082
1841	if (w->pending)	2083	if (w->pending)
1842	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2084	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843	}	2085	}
1844		2086
1845	static void noinline	2087	static void noinline ecb_cold
1846	verify_heap (EV_P_ ANHE *heap, int N)	2088	verify_heap (EV_P_ ANHE *heap, int N)
1847	{	2089	{
1848	int i;	2090	int i;
1849		2091
1850	for (i = HEAP0; i < N + HEAP0; ++i)	2092	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1855		2097
1856	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2098	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857	}	2099	}
1858	}	2100	}
1859		2101
1860	static void noinline	2102	static void noinline ecb_cold
1861	array_verify (EV_P_ W *ws, int cnt)	2103	array_verify (EV_P_ W *ws, int cnt)
1862	{	2104	{
1863	while (cnt--)	2105	while (cnt--)
1864	{	2106	{
1865	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2107	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1867	}	2109	}
1868	}	2110	}
1869	#endif	2111	#endif
1870		2112
1871	#if EV_FEATURE_API	2113	#if EV_FEATURE_API
1872	void	2114	void ecb_cold
1873	ev_loop_verify (EV_P)	2115	ev_verify (EV_P)
1874	{	2116	{
1875	#if EV_VERIFY	2117	#if EV_VERIFY
1876	int i;	2118	int i;
1877	WL w;	2119	WL w;
1878		2120
…		…
1912	#if EV_FORK_ENABLE	2154	#if EV_FORK_ENABLE
1913	assert (forkmax >= forkcnt);	2155	assert (forkmax >= forkcnt);
1914	array_verify (EV_A_ (W *)forks, forkcnt);	2156	array_verify (EV_A_ (W *)forks, forkcnt);
1915	#endif	2157	#endif
1916		2158
		2159	#if EV_CLEANUP_ENABLE
		2160	assert (cleanupmax >= cleanupcnt);
		2161	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2162	#endif
		2163
1917	#if EV_ASYNC_ENABLE	2164	#if EV_ASYNC_ENABLE
1918	assert (asyncmax >= asynccnt);	2165	assert (asyncmax >= asynccnt);
1919	array_verify (EV_A_ (W *)asyncs, asynccnt);	2166	array_verify (EV_A_ (W *)asyncs, asynccnt);
1920	#endif	2167	#endif
1921		2168
…		…
1938	#endif	2185	#endif
1939	}	2186	}
1940	#endif	2187	#endif
1941		2188
1942	#if EV_MULTIPLICITY	2189	#if EV_MULTIPLICITY
1943	struct ev_loop *	2190	struct ev_loop * ecb_cold
1944	ev_default_loop_init (unsigned int flags)
1945	#else	2191	#else
1946	int	2192	int
		2193	#endif
1947	ev_default_loop (unsigned int flags)	2194	ev_default_loop (unsigned int flags)
1948	#endif
1949	{	2195	{
1950	if (!ev_default_loop_ptr)	2196	if (!ev_default_loop_ptr)
1951	{	2197	{
1952	#if EV_MULTIPLICITY	2198	#if EV_MULTIPLICITY
1953	EV_P = ev_default_loop_ptr = &default_loop_struct;	2199	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1972		2218
1973	return ev_default_loop_ptr;	2219	return ev_default_loop_ptr;
1974	}	2220	}
1975		2221
1976	void	2222	void
1977	ev_default_destroy (void)	2223	ev_loop_fork (EV_P)
1978	{	2224	{
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 */	2225	postfork = 1; /* must be in line with ev_default_fork */
2001	}	2226	}
2002		2227
2003	/*****************************************************************************/	2228	/*****************************************************************************/
2004		2229
2005	void	2230	void
…		…
2027		2252
2028	for (pri = NUMPRI; pri--; )	2253	for (pri = NUMPRI; pri--; )
2029	while (pendingcnt [pri])	2254	while (pendingcnt [pri])
2030	{	2255	{
2031	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2256	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		2257
2036	p->w->pending = 0;	2258	p->w->pending = 0;
2037	EV_CB_INVOKE (p->w, p->events);	2259	EV_CB_INVOKE (p->w, p->events);
2038	EV_FREQUENT_CHECK;	2260	EV_FREQUENT_CHECK;
2039	}	2261	}
…		…
2096	EV_FREQUENT_CHECK;	2318	EV_FREQUENT_CHECK;
2097	feed_reverse (EV_A_ (W)w);	2319	feed_reverse (EV_A_ (W)w);
2098	}	2320	}
2099	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);	2321	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2100		2322
2101	feed_reverse_done (EV_A_ EV_TIMEOUT);	2323	feed_reverse_done (EV_A_ EV_TIMER);
2102	}	2324	}
2103	}	2325	}
2104		2326
2105	#if EV_PERIODIC_ENABLE	2327	#if EV_PERIODIC_ENABLE
		2328
		2329	static void noinline
		2330	periodic_recalc (EV_P_ ev_periodic *w)
		2331	{
		2332	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2333	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2334
		2335	/* the above almost always errs on the low side */
		2336	while (at <= ev_rt_now)
		2337	{
		2338	ev_tstamp nat = at + w->interval;
		2339
		2340	/* when resolution fails us, we use ev_rt_now */
		2341	if (expect_false (nat == at))
		2342	{
		2343	at = ev_rt_now;
		2344	break;
		2345	}
		2346
		2347	at = nat;
		2348	}
		2349
		2350	ev_at (w) = at;
		2351	}
		2352
2106	/* make periodics pending */	2353	/* make periodics pending */
2107	inline_size void	2354	inline_size void
2108	periodics_reify (EV_P)	2355	periodics_reify (EV_P)
2109	{	2356	{
2110	EV_FREQUENT_CHECK;	2357	EV_FREQUENT_CHECK;
…		…
2129	ANHE_at_cache (periodics [HEAP0]);	2376	ANHE_at_cache (periodics [HEAP0]);
2130	downheap (periodics, periodiccnt, HEAP0);	2377	downheap (periodics, periodiccnt, HEAP0);
2131	}	2378	}
2132	else if (w->interval)	2379	else if (w->interval)
2133	{	2380	{
2134	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2381	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]);	2382	ANHE_at_cache (periodics [HEAP0]);
2149	downheap (periodics, periodiccnt, HEAP0);	2383	downheap (periodics, periodiccnt, HEAP0);
2150	}	2384	}
2151	else	2385	else
2152	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2386	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2159	feed_reverse_done (EV_A_ EV_PERIODIC);	2393	feed_reverse_done (EV_A_ EV_PERIODIC);
2160	}	2394	}
2161	}	2395	}
2162		2396
2163	/* simply recalculate all periodics */	2397	/* simply recalculate all periodics */
2164	/* TODO: maybe ensure that at leats one event happens when jumping forward? */	2398	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2165	static void noinline	2399	static void noinline ecb_cold
2166	periodics_reschedule (EV_P)	2400	periodics_reschedule (EV_P)
2167	{	2401	{
2168	int i;	2402	int i;
2169		2403
2170	/* adjust periodics after time jump */	2404	/* adjust periodics after time jump */
…		…
2173	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);	2407	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174		2408
2175	if (w->reschedule_cb)	2409	if (w->reschedule_cb)
2176	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2410	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177	else if (w->interval)	2411	else if (w->interval)
2178	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2412	periodic_recalc (EV_A_ w);
2179		2413
2180	ANHE_at_cache (periodics [i]);	2414	ANHE_at_cache (periodics [i]);
2181	}	2415	}
2182		2416
2183	reheap (periodics, periodiccnt);	2417	reheap (periodics, periodiccnt);
2184	}	2418	}
2185	#endif	2419	#endif
2186		2420
2187	/* adjust all timers by a given offset */	2421	/* adjust all timers by a given offset */
2188	static void noinline	2422	static void noinline ecb_cold
2189	timers_reschedule (EV_P_ ev_tstamp adjust)	2423	timers_reschedule (EV_P_ ev_tstamp adjust)
2190	{	2424	{
2191	int i;	2425	int i;
2192		2426
2193	for (i = 0; i < timercnt; ++i)	2427	for (i = 0; i < timercnt; ++i)
…		…
2230	* doesn't hurt either as we only do this on time-jumps or	2464	* doesn't hurt either as we only do this on time-jumps or
2231	* in the unlikely event of having been preempted here.	2465	* in the unlikely event of having been preempted here.
2232	*/	2466	*/
2233	for (i = 4; --i; )	2467	for (i = 4; --i; )
2234	{	2468	{
		2469	ev_tstamp diff;
2235	rtmn_diff = ev_rt_now - mn_now;	2470	rtmn_diff = ev_rt_now - mn_now;
2236		2471
		2472	diff = odiff - rtmn_diff;
		2473
2237	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2474	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2238	return; /* all is well */	2475	return; /* all is well */
2239		2476
2240	ev_rt_now = ev_time ();	2477	ev_rt_now = ev_time ();
2241	mn_now = get_clock ();	2478	mn_now = get_clock ();
2242	now_floor = mn_now;	2479	now_floor = mn_now;
…		…
2265	mn_now = ev_rt_now;	2502	mn_now = ev_rt_now;
2266	}	2503	}
2267	}	2504	}
2268		2505
2269	void	2506	void
2270	ev_loop (EV_P_ int flags)	2507	ev_run (EV_P_ int flags)
2271	{	2508	{
2272	#if EV_FEATURE_API	2509	#if EV_FEATURE_API
2273	++loop_depth;	2510	++loop_depth;
2274	#endif	2511	#endif
2275		2512
2276	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2513	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2277		2514
2278	loop_done = EVUNLOOP_CANCEL;	2515	loop_done = EVBREAK_CANCEL;
2279		2516
2280	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2517	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2281		2518
2282	do	2519	do
2283	{	2520	{
2284	#if EV_VERIFY >= 2	2521	#if EV_VERIFY >= 2
2285	ev_loop_verify (EV_A);	2522	ev_verify (EV_A);
2286	#endif	2523	#endif
2287		2524
2288	#ifndef _WIN32	2525	#ifndef _WIN32
2289	if (expect_false (curpid)) /* penalise the forking check even more */	2526	if (expect_false (curpid)) /* penalise the forking check even more */
2290	if (expect_false (getpid () != curpid))	2527	if (expect_false (getpid () != curpid))
…		…
2326	/* calculate blocking time */	2563	/* calculate blocking time */
2327	{	2564	{
2328	ev_tstamp waittime = 0.;	2565	ev_tstamp waittime = 0.;
2329	ev_tstamp sleeptime = 0.;	2566	ev_tstamp sleeptime = 0.;
2330		2567
		2568	/* remember old timestamp for io_blocktime calculation */
		2569	ev_tstamp prev_mn_now = mn_now;
		2570
		2571	/* update time to cancel out callback processing overhead */
		2572	time_update (EV_A_ 1e100);
		2573
		2574	/* from now on, we want a pipe-wake-up */
		2575	pipe_write_wanted = 1;
		2576
2331	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2577	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2332	{	2578	{
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;	2579	waittime = MAX_BLOCKTIME;
2340		2580
2341	if (timercnt)	2581	if (timercnt)
2342	{	2582	{
2343	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2583	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2344	if (waittime > to) waittime = to;	2584	if (waittime > to) waittime = to;
2345	}	2585	}
2346		2586
2347	#if EV_PERIODIC_ENABLE	2587	#if EV_PERIODIC_ENABLE
2348	if (periodiccnt)	2588	if (periodiccnt)
2349	{	2589	{
2350	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2590	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2351	if (waittime > to) waittime = to;	2591	if (waittime > to) waittime = to;
2352	}	2592	}
2353	#endif	2593	#endif
2354		2594
2355	/* don't let timeouts decrease the waittime below timeout_blocktime */	2595	/* don't let timeouts decrease the waittime below timeout_blocktime */
2356	if (expect_false (waittime < timeout_blocktime))	2596	if (expect_false (waittime < timeout_blocktime))
2357	waittime = timeout_blocktime;	2597	waittime = timeout_blocktime;
		2598
		2599	/* at this point, we NEED to wait, so we have to ensure */
		2600	/* to pass a minimum nonzero value to the backend */
		2601	if (expect_false (waittime < backend_mintime))
		2602	waittime = backend_mintime;
2358		2603
2359	/* extra check because io_blocktime is commonly 0 */	2604	/* extra check because io_blocktime is commonly 0 */
2360	if (expect_false (io_blocktime))	2605	if (expect_false (io_blocktime))
2361	{	2606	{
2362	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2607	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363		2608
2364	if (sleeptime > waittime - backend_fudge)	2609	if (sleeptime > waittime - backend_mintime)
2365	sleeptime = waittime - backend_fudge;	2610	sleeptime = waittime - backend_mintime;
2366		2611
2367	if (expect_true (sleeptime > 0.))	2612	if (expect_true (sleeptime > 0.))
2368	{	2613	{
2369	ev_sleep (sleeptime);	2614	ev_sleep (sleeptime);
2370	waittime -= sleeptime;	2615	waittime -= sleeptime;
…		…
2373	}	2618	}
2374		2619
2375	#if EV_FEATURE_API	2620	#if EV_FEATURE_API
2376	++loop_count;	2621	++loop_count;
2377	#endif	2622	#endif
2378	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2623	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2379	backend_poll (EV_A_ waittime);	2624	backend_poll (EV_A_ waittime);
2380	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */	2625	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2626
		2627	pipe_write_wanted = 0;
		2628
		2629	if (pipe_write_skipped)
		2630	{
		2631	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2632	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2633	}
		2634
2381		2635
2382	/* update ev_rt_now, do magic */	2636	/* update ev_rt_now, do magic */
2383	time_update (EV_A_ waittime + sleeptime);	2637	time_update (EV_A_ waittime + sleeptime);
2384	}	2638	}
2385		2639
…		…
2403	EV_INVOKE_PENDING;	2657	EV_INVOKE_PENDING;
2404	}	2658	}
2405	while (expect_true (	2659	while (expect_true (
2406	activecnt	2660	activecnt
2407	&& !loop_done	2661	&& !loop_done
2408	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2662	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2409	));	2663	));
2410		2664
2411	if (loop_done == EVUNLOOP_ONE)	2665	if (loop_done == EVBREAK_ONE)
2412	loop_done = EVUNLOOP_CANCEL;	2666	loop_done = EVBREAK_CANCEL;
2413		2667
2414	#if EV_FEATURE_API	2668	#if EV_FEATURE_API
2415	--loop_depth;	2669	--loop_depth;
2416	#endif	2670	#endif
2417	}	2671	}
2418		2672
2419	void	2673	void
2420	ev_unloop (EV_P_ int how)	2674	ev_break (EV_P_ int how)
2421	{	2675	{
2422	loop_done = how;	2676	loop_done = how;
2423	}	2677	}
2424		2678
2425	void	2679	void
…		…
2573	EV_FREQUENT_CHECK;	2827	EV_FREQUENT_CHECK;
2574		2828
2575	wlist_del (&anfds[w->fd].head, (WL)w);	2829	wlist_del (&anfds[w->fd].head, (WL)w);
2576	ev_stop (EV_A_ (W)w);	2830	ev_stop (EV_A_ (W)w);
2577		2831
2578	fd_change (EV_A_ w->fd, 1);	2832	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2579		2833
2580	EV_FREQUENT_CHECK;	2834	EV_FREQUENT_CHECK;
2581	}	2835	}
2582		2836
2583	void noinline	2837	void noinline
…		…
2675	if (w->reschedule_cb)	2929	if (w->reschedule_cb)
2676	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2930	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2677	else if (w->interval)	2931	else if (w->interval)
2678	{	2932	{
2679	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2933	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 */	2934	periodic_recalc (EV_A_ w);
2681	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2682	}	2935	}
2683	else	2936	else
2684	ev_at (w) = w->offset;	2937	ev_at (w) = w->offset;
2685		2938
2686	EV_FREQUENT_CHECK;	2939	EV_FREQUENT_CHECK;
…		…
2807	sa.sa_handler = ev_sighandler;	3060	sa.sa_handler = ev_sighandler;
2808	sigfillset (&sa.sa_mask);	3061	sigfillset (&sa.sa_mask);
2809	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3062	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810	sigaction (w->signum, &sa, 0);	3063	sigaction (w->signum, &sa, 0);
2811		3064
		3065	if (origflags & EVFLAG_NOSIGMASK)
		3066	{
2812	sigemptyset (&sa.sa_mask);	3067	sigemptyset (&sa.sa_mask);
2813	sigaddset (&sa.sa_mask, w->signum);	3068	sigaddset (&sa.sa_mask, w->signum);
2814	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3069	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3070	}
2815	#endif	3071	#endif
2816	}	3072	}
2817		3073
2818	EV_FREQUENT_CHECK;	3074	EV_FREQUENT_CHECK;
2819	}	3075	}
…		…
2960	if (!pend || pend == path)	3216	if (!pend || pend == path)
2961	break;	3217	break;
2962		3218
2963	*pend = 0;	3219	*pend = 0;
2964	w->wd = inotify_add_watch (fs_fd, path, mask);	3220	w->wd = inotify_add_watch (fs_fd, path, mask);
2965	}	3221	}
2966	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3222	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967	}	3223	}
2968	}	3224	}
2969		3225
2970	if (w->wd >= 0)	3226	if (w->wd >= 0)
…		…
3037	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3293	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038	ofs += sizeof (struct inotify_event) + ev->len;	3294	ofs += sizeof (struct inotify_event) + ev->len;
3039	}	3295	}
3040	}	3296	}
3041		3297
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	3298	inline_size void ecb_cold
3075	ev_check_2625 (EV_P)	3299	ev_check_2625 (EV_P)
3076	{	3300	{
3077	/* kernels < 2.6.25 are borked	3301	/* kernels < 2.6.25 are borked
3078	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3302	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079	*/	3303	*/
…		…
3400		3624
3401	#if EV_EMBED_ENABLE	3625	#if EV_EMBED_ENABLE
3402	void noinline	3626	void noinline
3403	ev_embed_sweep (EV_P_ ev_embed *w)	3627	ev_embed_sweep (EV_P_ ev_embed *w)
3404	{	3628	{
3405	ev_loop (w->other, EVLOOP_NONBLOCK);	3629	ev_run (w->other, EVRUN_NOWAIT);
3406	}	3630	}
3407		3631
3408	static void	3632	static void
3409	embed_io_cb (EV_P_ ev_io *io, int revents)	3633	embed_io_cb (EV_P_ ev_io *io, int revents)
3410	{	3634	{
3411	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3635	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412		3636
3413	if (ev_cb (w))	3637	if (ev_cb (w))
3414	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3638	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415	else	3639	else
3416	ev_loop (w->other, EVLOOP_NONBLOCK);	3640	ev_run (w->other, EVRUN_NOWAIT);
3417	}	3641	}
3418		3642
3419	static void	3643	static void
3420	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3644	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421	{	3645	{
…		…
3425	EV_P = w->other;	3649	EV_P = w->other;
3426		3650
3427	while (fdchangecnt)	3651	while (fdchangecnt)
3428	{	3652	{
3429	fd_reify (EV_A);	3653	fd_reify (EV_A);
3430	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3654	ev_run (EV_A_ EVRUN_NOWAIT);
3431	}	3655	}
3432	}	3656	}
3433	}	3657	}
3434		3658
3435	static void	3659	static void
…		…
3441		3665
3442	{	3666	{
3443	EV_P = w->other;	3667	EV_P = w->other;
3444		3668
3445	ev_loop_fork (EV_A);	3669	ev_loop_fork (EV_A);
3446	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3670	ev_run (EV_A_ EVRUN_NOWAIT);
3447	}	3671	}
3448		3672
3449	ev_embed_start (EV_A_ w);	3673	ev_embed_start (EV_A_ w);
3450	}	3674	}
3451		3675
…		…
3543		3767
3544	EV_FREQUENT_CHECK;	3768	EV_FREQUENT_CHECK;
3545	}	3769	}
3546	#endif	3770	#endif
3547		3771
		3772	#if EV_CLEANUP_ENABLE
		3773	void
		3774	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3775	{
		3776	if (expect_false (ev_is_active (w)))
		3777	return;
		3778
		3779	EV_FREQUENT_CHECK;
		3780
		3781	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3782	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3783	cleanups [cleanupcnt - 1] = w;
		3784
		3785	/* cleanup watchers should never keep a refcount on the loop */
		3786	ev_unref (EV_A);
		3787	EV_FREQUENT_CHECK;
		3788	}
		3789
		3790	void
		3791	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3792	{
		3793	clear_pending (EV_A_ (W)w);
		3794	if (expect_false (!ev_is_active (w)))
		3795	return;
		3796
		3797	EV_FREQUENT_CHECK;
		3798	ev_ref (EV_A);
		3799
		3800	{
		3801	int active = ev_active (w);
		3802
		3803	cleanups [active - 1] = cleanups [--cleanupcnt];
		3804	ev_active (cleanups [active - 1]) = active;
		3805	}
		3806
		3807	ev_stop (EV_A_ (W)w);
		3808
		3809	EV_FREQUENT_CHECK;
		3810	}
		3811	#endif
		3812
3548	#if EV_ASYNC_ENABLE	3813	#if EV_ASYNC_ENABLE
3549	void	3814	void
3550	ev_async_start (EV_P_ ev_async *w)	3815	ev_async_start (EV_P_ ev_async *w)
3551	{	3816	{
3552	if (expect_false (ev_is_active (w)))	3817	if (expect_false (ev_is_active (w)))
3553	return;	3818	return;
		3819
		3820	w->sent = 0;
3554		3821
3555	evpipe_init (EV_A);	3822	evpipe_init (EV_A);
3556		3823
3557	EV_FREQUENT_CHECK;	3824	EV_FREQUENT_CHECK;
3558		3825
…		…
3636	{	3903	{
3637	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3904	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3638		3905
3639	if (expect_false (!once))	3906	if (expect_false (!once))
3640	{	3907	{
3641	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3908	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3642	return;	3909	return;
3643	}	3910	}
3644		3911
3645	once->cb = cb;	3912	once->cb = cb;
3646	once->arg = arg;	3913	once->arg = arg;
…		…
3661	}	3928	}
3662		3929
3663	/*****************************************************************************/	3930	/*****************************************************************************/
3664		3931
3665	#if EV_WALK_ENABLE	3932	#if EV_WALK_ENABLE
3666	void	3933	void ecb_cold
3667	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))	3934	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668	{	3935	{
3669	int i, j;	3936	int i, j;
3670	ev_watcher_list *wl, *wn;	3937	ev_watcher_list *wl, *wn;
3671		3938
…		…
3778		4045
3779	#if EV_MULTIPLICITY	4046	#if EV_MULTIPLICITY
3780	#include "ev_wrap.h"	4047	#include "ev_wrap.h"
3781	#endif	4048	#endif
3782		4049
3783	#ifdef __cplusplus	4050	EV_CPP(})
3784	}
3785	#endif
3786		4051

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines