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

Comparing libev/ev.c (file contents):
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs.
Revision 1.419 by root, Thu Apr 12 04:10:15 2012 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011,2012 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,
43	# include EV_CONFIG_H	43	# include EV_CONFIG_H
44	# else	44	# else
45	# include "config.h"	45	# include "config.h"
46	# endif	46	# endif
47		47
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
		53
48	# if HAVE_CLOCK_SYSCALL	54	# if HAVE_CLOCK_SYSCALL
49	# ifndef EV_USE_CLOCK_SYSCALL	55	# ifndef EV_USE_CLOCK_SYSCALL
50	# define EV_USE_CLOCK_SYSCALL 1	56	# define EV_USE_CLOCK_SYSCALL 1
51	# ifndef EV_USE_REALTIME	57	# ifndef EV_USE_REALTIME
52	# define EV_USE_REALTIME 0	58	# define EV_USE_REALTIME 0
53	# endif	59	# endif
54	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
55	# define EV_USE_MONOTONIC 1	61	# define EV_USE_MONOTONIC 1
56	# endif	62	# endif
57	# endif	63	# endif
58	# elif !defined(EV_USE_CLOCK_SYSCALL)	64	# elif !defined EV_USE_CLOCK_SYSCALL
59	# define EV_USE_CLOCK_SYSCALL 0	65	# define EV_USE_CLOCK_SYSCALL 0
60	# endif	66	# endif
61		67
62	# if HAVE_CLOCK_GETTIME	68	# if HAVE_CLOCK_GETTIME
63	# ifndef EV_USE_MONOTONIC	69	# ifndef EV_USE_MONOTONIC
…		…
156	# define EV_USE_EVENTFD 0	162	# define EV_USE_EVENTFD 0
157	# endif	163	# endif
158		164
159	#endif	165	#endif
160		166
161	#include <math.h>
162	#include <stdlib.h>	167	#include <stdlib.h>
163	#include <string.h>	168	#include <string.h>
164	#include <fcntl.h>	169	#include <fcntl.h>
165	#include <stddef.h>	170	#include <stddef.h>
166		171
…		…
178	# include EV_H	183	# include EV_H
179	#else	184	#else
180	# include "ev.h"	185	# include "ev.h"
181	#endif	186	#endif
182		187
183	EV_CPP(extern "C" {)	188	#if EV_NO_THREADS
		189	# undef EV_NO_SMP
		190	# define EV_NO_SMP 1
		191	# undef ECB_NO_THREADS
		192	# define ECB_NO_THREADS 1
		193	#endif
		194	#if EV_NO_SMP
		195	# undef EV_NO_SMP
		196	# define ECB_NO_SMP 1
		197	#endif
184		198
185	#ifndef _WIN32	199	#ifndef _WIN32
186	# include <sys/time.h>	200	# include <sys/time.h>
187	# include <sys/wait.h>	201	# include <sys/wait.h>
188	# include <unistd.h>	202	# include <unistd.h>
…		…
205	#define _DARWIN_UNLIMITED_SELECT 1	219	#define _DARWIN_UNLIMITED_SELECT 1
206		220
207	/* this block tries to deduce configuration from header-defined symbols and defaults */	221	/* this block tries to deduce configuration from header-defined symbols and defaults */
208		222
209	/* try to deduce the maximum number of signals on this platform */	223	/* try to deduce the maximum number of signals on this platform */
210	#if defined (EV_NSIG)	224	#if defined EV_NSIG
211	/* use what's provided */	225	/* use what's provided */
212	#elif defined (NSIG)	226	#elif defined NSIG
213	# define EV_NSIG (NSIG)	227	# define EV_NSIG (NSIG)
214	#elif defined(_NSIG)	228	#elif defined _NSIG
215	# define EV_NSIG (_NSIG)	229	# define EV_NSIG (_NSIG)
216	#elif defined (SIGMAX)	230	#elif defined SIGMAX
217	# define EV_NSIG (SIGMAX+1)	231	# define EV_NSIG (SIGMAX+1)
218	#elif defined (SIG_MAX)	232	#elif defined SIG_MAX
219	# define EV_NSIG (SIG_MAX+1)	233	# define EV_NSIG (SIG_MAX+1)
220	#elif defined (_SIG_MAX)	234	#elif defined _SIG_MAX
221	# define EV_NSIG (_SIG_MAX+1)	235	# define EV_NSIG (_SIG_MAX+1)
222	#elif defined (MAXSIG)	236	#elif defined MAXSIG
223	# define EV_NSIG (MAXSIG+1)	237	# define EV_NSIG (MAXSIG+1)
224	#elif defined (MAX_SIG)	238	#elif defined MAX_SIG
225	# define EV_NSIG (MAX_SIG+1)	239	# define EV_NSIG (MAX_SIG+1)
226	#elif defined (SIGARRAYSIZE)	240	#elif defined SIGARRAYSIZE
227	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */	241	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228	#elif defined (_sys_nsig)	242	#elif defined _sys_nsig
229	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */	243	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230	#else	244	#else
231	# error "unable to find value for NSIG, please report"	245	# error "unable to find value for NSIG, please report"
232	/* to make it compile regardless, just remove the above line, */	246	/* to make it compile regardless, just remove the above line, */
233	/* but consider reporting it, too! :) */	247	/* but consider reporting it, too! :) */
234	# define EV_NSIG 65	248	# define EV_NSIG 65
235	#endif	249	#endif
236		250
		251	#ifndef EV_USE_FLOOR
		252	# define EV_USE_FLOOR 0
		253	#endif
		254
237	#ifndef EV_USE_CLOCK_SYSCALL	255	#ifndef EV_USE_CLOCK_SYSCALL
238	# if __linux && __GLIBC__ >= 2	256	# if __linux && __GLIBC__ >= 2
239	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS	257	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240	# else	258	# else
241	# define EV_USE_CLOCK_SYSCALL 0	259	# define EV_USE_CLOCK_SYSCALL 0
242	# endif	260	# endif
243	#endif	261	#endif
244		262
245	#ifndef EV_USE_MONOTONIC	263	#ifndef EV_USE_MONOTONIC
246	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	264	# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247	# define EV_USE_MONOTONIC EV_FEATURE_OS	265	# define EV_USE_MONOTONIC EV_FEATURE_OS
248	# else	266	# else
249	# define EV_USE_MONOTONIC 0	267	# define EV_USE_MONOTONIC 0
250	# endif	268	# endif
251	#endif	269	#endif
…		…
377	# define EV_USE_INOTIFY 0	395	# define EV_USE_INOTIFY 0
378	#endif	396	#endif
379		397
380	#if !EV_USE_NANOSLEEP	398	#if !EV_USE_NANOSLEEP
381	/* hp-ux has it in sys/time.h, which we unconditionally include above */	399	/* hp-ux has it in sys/time.h, which we unconditionally include above */
382	# if !defined(_WIN32) && !defined(__hpux)	400	# if !defined _WIN32 && !defined __hpux
383	# include <sys/select.h>	401	# include <sys/select.h>
384	# endif	402	# endif
385	#endif	403	#endif
386		404
387	#if EV_USE_INOTIFY	405	#if EV_USE_INOTIFY
…		…
443	#else	461	#else
444	# define EV_FREQUENT_CHECK do { } while (0)	462	# define EV_FREQUENT_CHECK do { } while (0)
445	#endif	463	#endif
446		464
447	/*	465	/*
448	* This is used to avoid floating point rounding problems.	466	* This is used to work around floating point rounding problems.
449	* It is added to ev_rt_now when scheduling periodics
450	* to ensure progress, time-wise, even when rounding
451	* errors are against us.
452	* This value is good at least till the year 4000.	467	* This value is good at least till the year 4000.
453	* Better solutions welcome.
454	*/	468	*/
455	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	469	#define MIN_INTERVAL 0.0001220703125 /* 1/2*13, good till 4000 /
		470	/#define MIN_INTERVAL 0.00000095367431640625 / 1/2*20, good till 2200 /
456		471
457	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	472	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	473	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459		474
460	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)	475	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)	476	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462		477
		478	/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
		479	/* ECB.H BEGIN */
		480	/*
		481	* libecb - http://software.schmorp.de/pkg/libecb
		482	*
		483	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
		484	* Copyright (©) 2011 Emanuele Giaquinta
		485	* All rights reserved.
		486	*
		487	* Redistribution and use in source and binary forms, with or without modifica-
		488	* tion, are permitted provided that the following conditions are met:
		489	*
		490	* 1. Redistributions of source code must retain the above copyright notice,
		491	* this list of conditions and the following disclaimer.
		492	*
		493	* 2. Redistributions in binary form must reproduce the above copyright
		494	* notice, this list of conditions and the following disclaimer in the
		495	* documentation and/or other materials provided with the distribution.
		496	*
		497	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		498	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		499	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		500	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		501	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		502	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		503	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		504	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		505	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		506	* OF THE POSSIBILITY OF SUCH DAMAGE.
		507	*/
		508
		509	#ifndef ECB_H
		510	#define ECB_H
		511
		512	#ifdef _WIN32
		513	typedef signed char int8_t;
		514	typedef unsigned char uint8_t;
		515	typedef signed short int16_t;
		516	typedef unsigned short uint16_t;
		517	typedef signed int int32_t;
		518	typedef unsigned int uint32_t;
463	#if __GNUC__ >= 4	519	#if __GNUC__
464	# define expect(expr,value) __builtin_expect ((expr),(value))	520	typedef signed long long int64_t;
465	# define noinline __attribute__ ((noinline))	521	typedef unsigned long long uint64_t;
		522	#else /* _MSC_VER \|\| __BORLANDC__ */
		523	typedef signed __int64 int64_t;
		524	typedef unsigned __int64 uint64_t;
		525	#endif
466	#else	526	#else
467	# define expect(expr,value) (expr)	527	#include <inttypes.h>
468	# define noinline
469	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470	# define inline
471	# endif	528	#endif
		529
		530	/* many compilers define _GNUC_ to some versions but then only implement
		531	* what their idiot authors think are the "more important" extensions,
		532	* causing enormous grief in return for some better fake benchmark numbers.
		533	* or so.
		534	* we try to detect these and simply assume they are not gcc - if they have
		535	* an issue with that they should have done it right in the first place.
		536	*/
		537	#ifndef ECB_GCC_VERSION
		538	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
		539	#define ECB_GCC_VERSION(major,minor) 0
		540	#else
		541	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
472	#endif	542	#endif
		543	#endif
473		544
		545	/*****************************************************************************/
		546
		547	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		548	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		549
		550	#if ECB_NO_THREADS
		551	# define ECB_NO_SMP 1
		552	#endif
		553
		554	#if ECB_NO_THREADS \|\| ECB_NO_SMP
		555	#define ECB_MEMORY_FENCE do { } while (0)
		556	#endif
		557
		558	#ifndef ECB_MEMORY_FENCE
		559	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		560	#if __i386 \|\| __i386__
		561	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		562	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		563	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		564	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		565	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		566	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		567	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		568	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		569	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		570	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
		571	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
		572	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		573	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		574	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
		575	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		576	#elif __sparc \|\| __sparc__
		577	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")
		578	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		579	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		580	#elif defined __s390__ \|\| defined __s390x__
		581	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		582	#elif defined __mips__
		583	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		584	#elif defined __alpha__
		585	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		586	#endif
		587	#endif
		588	#endif
		589
		590	#ifndef ECB_MEMORY_FENCE
		591	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
		592	#define ECB_MEMORY_FENCE __sync_synchronize ()
		593	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		594	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		595	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		596	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		597	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		598	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		599	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		600	#elif defined _WIN32
		601	#include <WinNT.h>
		602	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		603	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		604	#include <mbarrier.h>
		605	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		606	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		607	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		608	#elif __xlC__
		609	#define ECB_MEMORY_FENCE __sync ()
		610	#endif
		611	#endif
		612
		613	#ifndef ECB_MEMORY_FENCE
		614	#if !ECB_AVOID_PTHREADS
		615	/*
		616	* if you get undefined symbol references to pthread_mutex_lock,
		617	* or failure to find pthread.h, then you should implement
		618	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		619	* OR provide pthread.h and link against the posix thread library
		620	* of your system.
		621	*/
		622	#include <pthread.h>
		623	#define ECB_NEEDS_PTHREADS 1
		624	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		625
		626	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		627	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		628	#endif
		629	#endif
		630
		631	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		632	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		633	#endif
		634
		635	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		636	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		637	#endif
		638
		639	/*****************************************************************************/
		640
		641	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		642
		643	#if __cplusplus
		644	#define ecb_inline static inline
		645	#elif ECB_GCC_VERSION(2,5)
		646	#define ecb_inline static __inline__
		647	#elif ECB_C99
		648	#define ecb_inline static inline
		649	#else
		650	#define ecb_inline static
		651	#endif
		652
		653	#if ECB_GCC_VERSION(3,3)
		654	#define ecb_restrict __restrict__
		655	#elif ECB_C99
		656	#define ecb_restrict restrict
		657	#else
		658	#define ecb_restrict
		659	#endif
		660
		661	typedef int ecb_bool;
		662
		663	#define ECB_CONCAT_(a, b) a ## b
		664	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
		665	#define ECB_STRINGIFY_(a) # a
		666	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		667
		668	#define ecb_function_ ecb_inline
		669
		670	#if ECB_GCC_VERSION(3,1)
		671	#define ecb_attribute(attrlist) __attribute__(attrlist)
		672	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		673	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		674	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		675	#else
		676	#define ecb_attribute(attrlist)
		677	#define ecb_is_constant(expr) 0
		678	#define ecb_expect(expr,value) (expr)
		679	#define ecb_prefetch(addr,rw,locality)
		680	#endif
		681
		682	/* no emulation for ecb_decltype */
		683	#if ECB_GCC_VERSION(4,5)
		684	#define ecb_decltype(x) __decltype(x)
		685	#elif ECB_GCC_VERSION(3,0)
		686	#define ecb_decltype(x) __typeof(x)
		687	#endif
		688
		689	#define ecb_noinline ecb_attribute ((__noinline__))
		690	#define ecb_noreturn ecb_attribute ((__noreturn__))
		691	#define ecb_unused ecb_attribute ((__unused__))
		692	#define ecb_const ecb_attribute ((__const__))
		693	#define ecb_pure ecb_attribute ((__pure__))
		694
		695	#if ECB_GCC_VERSION(4,3)
		696	#define ecb_artificial ecb_attribute ((__artificial__))
		697	#define ecb_hot ecb_attribute ((__hot__))
		698	#define ecb_cold ecb_attribute ((__cold__))
		699	#else
		700	#define ecb_artificial
		701	#define ecb_hot
		702	#define ecb_cold
		703	#endif
		704
		705	/* put around conditional expressions if you are very sure that the */
		706	/* expression is mostly true or mostly false. note that these return */
		707	/* booleans, not the expression. */
474	#define expect_false(expr) expect ((expr) != 0, 0)	708	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475	#define expect_true(expr) expect ((expr) != 0, 1)	709	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		710	/* for compatibility to the rest of the world */
		711	#define ecb_likely(expr) ecb_expect_true (expr)
		712	#define ecb_unlikely(expr) ecb_expect_false (expr)
		713
		714	/* count trailing zero bits and count # of one bits */
		715	#if ECB_GCC_VERSION(3,4)
		716	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		717	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		718	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		719	#define ecb_ctz32(x) __builtin_ctz (x)
		720	#define ecb_ctz64(x) __builtin_ctzll (x)
		721	#define ecb_popcount32(x) __builtin_popcount (x)
		722	/* no popcountll */
		723	#else
		724	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		725	ecb_function_ int
		726	ecb_ctz32 (uint32_t x)
		727	{
		728	int r = 0;
		729
		730	x &= ~x + 1; /* this isolates the lowest bit */
		731
		732	#if ECB_branchless_on_i386
		733	r += !!(x & 0xaaaaaaaa) << 0;
		734	r += !!(x & 0xcccccccc) << 1;
		735	r += !!(x & 0xf0f0f0f0) << 2;
		736	r += !!(x & 0xff00ff00) << 3;
		737	r += !!(x & 0xffff0000) << 4;
		738	#else
		739	if (x & 0xaaaaaaaa) r += 1;
		740	if (x & 0xcccccccc) r += 2;
		741	if (x & 0xf0f0f0f0) r += 4;
		742	if (x & 0xff00ff00) r += 8;
		743	if (x & 0xffff0000) r += 16;
		744	#endif
		745
		746	return r;
		747	}
		748
		749	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		750	ecb_function_ int
		751	ecb_ctz64 (uint64_t x)
		752	{
		753	int shift = x & 0xffffffffU ? 0 : 32;
		754	return ecb_ctz32 (x >> shift) + shift;
		755	}
		756
		757	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		758	ecb_function_ int
		759	ecb_popcount32 (uint32_t x)
		760	{
		761	x -= (x >> 1) & 0x55555555;
		762	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		763	x = ((x >> 4) + x) & 0x0f0f0f0f;
		764	x *= 0x01010101;
		765
		766	return x >> 24;
		767	}
		768
		769	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		770	ecb_function_ int ecb_ld32 (uint32_t x)
		771	{
		772	int r = 0;
		773
		774	if (x >> 16) { x >>= 16; r += 16; }
		775	if (x >> 8) { x >>= 8; r += 8; }
		776	if (x >> 4) { x >>= 4; r += 4; }
		777	if (x >> 2) { x >>= 2; r += 2; }
		778	if (x >> 1) { r += 1; }
		779
		780	return r;
		781	}
		782
		783	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		784	ecb_function_ int ecb_ld64 (uint64_t x)
		785	{
		786	int r = 0;
		787
		788	if (x >> 32) { x >>= 32; r += 32; }
		789
		790	return r + ecb_ld32 (x);
		791	}
		792	#endif
		793
		794	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		795	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		796	{
		797	return ( (x * 0x0802U & 0x22110U)
		798	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		799	}
		800
		801	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		802	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		803	{
		804	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		805	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		806	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		807	x = ( x >> 8 ) \| ( x << 8);
		808
		809	return x;
		810	}
		811
		812	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		813	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		814	{
		815	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		816	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		817	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		818	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		819	x = ( x >> 16 ) \| ( x << 16);
		820
		821	return x;
		822	}
		823
		824	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		825	/* so for this version we are lazy */
		826	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		827	ecb_function_ int
		828	ecb_popcount64 (uint64_t x)
		829	{
		830	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		831	}
		832
		833	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		834	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		835	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		836	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		837	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		838	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		839	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		840	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		841
		842	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		843	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		844	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		845	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		846	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		847	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		848	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		849	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		850
		851	#if ECB_GCC_VERSION(4,3)
		852	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		853	#define ecb_bswap32(x) __builtin_bswap32 (x)
		854	#define ecb_bswap64(x) __builtin_bswap64 (x)
		855	#else
		856	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		857	ecb_function_ uint16_t
		858	ecb_bswap16 (uint16_t x)
		859	{
		860	return ecb_rotl16 (x, 8);
		861	}
		862
		863	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		864	ecb_function_ uint32_t
		865	ecb_bswap32 (uint32_t x)
		866	{
		867	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		868	}
		869
		870	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		871	ecb_function_ uint64_t
		872	ecb_bswap64 (uint64_t x)
		873	{
		874	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		875	}
		876	#endif
		877
		878	#if ECB_GCC_VERSION(4,5)
		879	#define ecb_unreachable() __builtin_unreachable ()
		880	#else
		881	/* this seems to work fine, but gcc always emits a warning for it :/ */
		882	ecb_inline void ecb_unreachable (void) ecb_noreturn;
		883	ecb_inline void ecb_unreachable (void) { }
		884	#endif
		885
		886	/* try to tell the compiler that some condition is definitely true */
		887	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
		888
		889	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
		890	ecb_inline unsigned char
		891	ecb_byteorder_helper (void)
		892	{
		893	const uint32_t u = 0x11223344;
		894	return (unsigned char )&u;
		895	}
		896
		897	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
		898	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
		899	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
		900	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
		901
		902	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		903	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		904	#else
		905	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		906	#endif
		907
		908	#if __cplusplus
		909	template<typename T>
		910	static inline T ecb_div_rd (T val, T div)
		911	{
		912	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		913	}
		914	template<typename T>
		915	static inline T ecb_div_ru (T val, T div)
		916	{
		917	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		918	}
		919	#else
		920	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		921	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		922	#endif
		923
		924	#if ecb_cplusplus_does_not_suck
		925	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
		926	template<typename T, int N>
		927	static inline int ecb_array_length (const T (&arr)[N])
		928	{
		929	return N;
		930	}
		931	#else
		932	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		933	#endif
		934
		935	#endif
		936
		937	/* ECB.H END */
		938
		939	#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
		940	/* if your architecture doesn't need memory fences, e.g. because it is
		941	* single-cpu/core, or if you use libev in a project that doesn't use libev
		942	* from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
		943	* libev, in which cases the memory fences become nops.
		944	* alternatively, you can remove this #error and link against libpthread,
		945	* which will then provide the memory fences.
		946	*/
		947	# error "memory fences not defined for your architecture, please report"
		948	#endif
		949
		950	#ifndef ECB_MEMORY_FENCE
		951	# define ECB_MEMORY_FENCE do { } while (0)
		952	# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		953	# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		954	#endif
		955
		956	#define expect_false(cond) ecb_expect_false (cond)
		957	#define expect_true(cond) ecb_expect_true (cond)
		958	#define noinline ecb_noinline
		959
476	#define inline_size static inline	960	#define inline_size ecb_inline
477		961
478	#if EV_FEATURE_CODE	962	#if EV_FEATURE_CODE
479	# define inline_speed static inline	963	# define inline_speed ecb_inline
480	#else	964	#else
481	# define inline_speed static noinline	965	# define inline_speed static noinline
482	#endif	966	#endif
483		967
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	968	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	1007	# include "ev_win32.c"
524	#endif	1008	#endif
525		1009
526	/*****************************************************************************/	1010	/*****************************************************************************/
527		1011
		1012	/* define a suitable floor function (only used by periodics atm) */
		1013
		1014	#if EV_USE_FLOOR
		1015	# include <math.h>
		1016	# define ev_floor(v) floor (v)
		1017	#else
		1018
		1019	#include <float.h>
		1020
		1021	/* a floor() replacement function, should be independent of ev_tstamp type */
		1022	static ev_tstamp noinline
		1023	ev_floor (ev_tstamp v)
		1024	{
		1025	/* the choice of shift factor is not terribly important */
		1026	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		1027	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		1028	#else
		1029	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		1030	#endif
		1031
		1032	/* argument too large for an unsigned long? */
		1033	if (expect_false (v >= shift))
		1034	{
		1035	ev_tstamp f;
		1036
		1037	if (v == v - 1.)
		1038	return v; /* very large number */
		1039
		1040	f = shift * ev_floor (v * (1. / shift));
		1041	return f + ev_floor (v - f);
		1042	}
		1043
		1044	/* special treatment for negative args? */
		1045	if (expect_false (v < 0.))
		1046	{
		1047	ev_tstamp f = -ev_floor (-v);
		1048
		1049	return f - (f == v ? 0 : 1);
		1050	}
		1051
		1052	/* fits into an unsigned long */
		1053	return (unsigned long)v;
		1054	}
		1055
		1056	#endif
		1057
		1058	/*****************************************************************************/
		1059
528	#ifdef __linux	1060	#ifdef __linux
529	# include <sys/utsname.h>	1061	# include <sys/utsname.h>
530	#endif	1062	#endif
531		1063
532	static unsigned int noinline	1064	static unsigned int noinline ecb_cold
533	ev_linux_version (void)	1065	ev_linux_version (void)
534	{	1066	{
535	#ifdef __linux	1067	#ifdef __linux
536	unsigned int v = 0;	1068	unsigned int v = 0;
537	struct utsname buf;	1069	struct utsname buf;
…		…
566	}	1098	}
567		1099
568	/*****************************************************************************/	1100	/*****************************************************************************/
569		1101
570	#if EV_AVOID_STDIO	1102	#if EV_AVOID_STDIO
571	static void noinline	1103	static void noinline ecb_cold
572	ev_printerr (const char *msg)	1104	ev_printerr (const char *msg)
573	{	1105	{
574	write (STDERR_FILENO, msg, strlen (msg));	1106	write (STDERR_FILENO, msg, strlen (msg));
575	}	1107	}
576	#endif	1108	#endif
577		1109
578	static void (syserr_cb)(const char msg);	1110	static void (syserr_cb)(const char msg);
579		1111
580	void	1112	void ecb_cold
581	ev_set_syserr_cb (void (cb)(const char msg))	1113	ev_set_syserr_cb (void (cb)(const char msg))
582	{	1114	{
583	syserr_cb = cb;	1115	syserr_cb = cb;
584	}	1116	}
585		1117
586	static void noinline	1118	static void noinline ecb_cold
587	ev_syserr (const char *msg)	1119	ev_syserr (const char *msg)
588	{	1120	{
589	if (!msg)	1121	if (!msg)
590	msg = "(libev) system error";	1122	msg = "(libev) system error";
591		1123
…		…
624	#endif	1156	#endif
625	}	1157	}
626		1158
627	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	1159	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
628		1160
629	void	1161	void ecb_cold
630	ev_set_allocator (void (cb)(void *ptr, long size))	1162	ev_set_allocator (void (cb)(void *ptr, long size))
631	{	1163	{
632	alloc = cb;	1164	alloc = cb;
633	}	1165	}
634		1166
…		…
723	#undef VAR	1255	#undef VAR
724	};	1256	};
725	#include "ev_wrap.h"	1257	#include "ev_wrap.h"
726		1258
727	static struct ev_loop default_loop_struct;	1259	static struct ev_loop default_loop_struct;
728	struct ev_loop *ev_default_loop_ptr;	1260	EV_API_DECL struct ev_loop ev_default_loop_ptr = 0; / needs to be initialised to make it a definition despite extern */
729		1261
730	#else	1262	#else
731		1263
732	ev_tstamp ev_rt_now;	1264	EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
733	#define VAR(name,decl) static decl;	1265	#define VAR(name,decl) static decl;
734	#include "ev_vars.h"	1266	#include "ev_vars.h"
735	#undef VAR	1267	#undef VAR
736		1268
737	static int ev_default_loop_ptr;	1269	static int ev_default_loop_ptr;
…		…
802	#if EV_USE_NANOSLEEP	1334	#if EV_USE_NANOSLEEP
803	struct timespec ts;	1335	struct timespec ts;
804		1336
805	EV_TS_SET (ts, delay);	1337	EV_TS_SET (ts, delay);
806	nanosleep (&ts, 0);	1338	nanosleep (&ts, 0);
807	#elif defined(_WIN32)	1339	#elif defined _WIN32
808	Sleep ((unsigned long)(delay * 1e3));	1340	Sleep ((unsigned long)(delay * 1e3));
809	#else	1341	#else
810	struct timeval tv;	1342	struct timeval tv;
811		1343
812	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	1344	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
…		…
816	select (0, 0, 0, 0, &tv);	1348	select (0, 0, 0, 0, &tv);
817	#endif	1349	#endif
818	}	1350	}
819	}	1351	}
820		1352
821	inline_speed int
822	ev_timeout_to_ms (ev_tstamp timeout)
823	{
824	int ms = timeout * 1000. + .999999;
825
826	return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827	}
828
829	/*****************************************************************************/	1353	/*****************************************************************************/
830		1354
831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	1355	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
832		1356
833	/* find a suitable new size for the given array, */	1357	/* find a suitable new size for the given array, */
…		…
839		1363
840	do	1364	do
841	ncur <<= 1;	1365	ncur <<= 1;
842	while (cnt > ncur);	1366	while (cnt > ncur);
843		1367
844	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */	1368	/* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)	1369	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
846	{	1370	{
847	ncur *= elem;	1371	ncur *= elem;
848	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);	1372	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
849	ncur = ncur - sizeof (void ) 4;	1373	ncur = ncur - sizeof (void ) 4;
…		…
851	}	1375	}
852		1376
853	return ncur;	1377	return ncur;
854	}	1378	}
855		1379
856	static noinline void *	1380	static void * noinline ecb_cold
857	array_realloc (int elem, void base, int cur, int cnt)	1381	array_realloc (int elem, void base, int cur, int cnt)
858	{	1382	{
859	cur = array_nextsize (elem, cur, cnt);	1383	cur = array_nextsize (elem, cur, cnt);
860	return ev_realloc (base, elem * *cur);	1384	return ev_realloc (base, elem * *cur);
861	}	1385	}
…		…
864	memset ((void )(base), 0, sizeof ((base)) * (count))	1388	memset ((void )(base), 0, sizeof ((base)) * (count))
865		1389
866	#define array_needsize(type,base,cur,cnt,init) \	1390	#define array_needsize(type,base,cur,cnt,init) \
867	if (expect_false ((cnt) > (cur))) \	1391	if (expect_false ((cnt) > (cur))) \
868	{ \	1392	{ \
869	int ocur_ = (cur); \	1393	int ecb_unused ocur_ = (cur); \
870	(base) = (type *)array_realloc \	1394	(base) = (type *)array_realloc \
871	(sizeof (type), (base), &(cur), (cnt)); \	1395	(sizeof (type), (base), &(cur), (cnt)); \
872	init ((base) + (ocur_), (cur) - ocur_); \	1396	init ((base) + (ocur_), (cur) - ocur_); \
873	}	1397	}
874		1398
…		…
980	for (i = 0; i < fdchangecnt; ++i)	1504	for (i = 0; i < fdchangecnt; ++i)
981	{	1505	{
982	int fd = fdchanges [i];	1506	int fd = fdchanges [i];
983	ANFD *anfd = anfds + fd;	1507	ANFD *anfd = anfds + fd;
984		1508
985	if (anfd->reify & EV__IOFDSET)	1509	if (anfd->reify & EV__IOFDSET && anfd->head)
986	{	1510	{
987	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);	1511	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
988		1512
989	if (handle != anfd->handle)	1513	if (handle != anfd->handle)
990	{	1514	{
…		…
1044	fdchanges [fdchangecnt - 1] = fd;	1568	fdchanges [fdchangecnt - 1] = fd;
1045	}	1569	}
1046	}	1570	}
1047		1571
1048	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1572	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1049	inline_speed void	1573	inline_speed void ecb_cold
1050	fd_kill (EV_P_ int fd)	1574	fd_kill (EV_P_ int fd)
1051	{	1575	{
1052	ev_io *w;	1576	ev_io *w;
1053		1577
1054	while ((w = (ev_io *)anfds [fd].head))	1578	while ((w = (ev_io *)anfds [fd].head))
…		…
1057	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1581	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1058	}	1582	}
1059	}	1583	}
1060		1584
1061	/* check whether the given fd is actually valid, for error recovery */	1585	/* check whether the given fd is actually valid, for error recovery */
1062	inline_size int	1586	inline_size int ecb_cold
1063	fd_valid (int fd)	1587	fd_valid (int fd)
1064	{	1588	{
1065	#ifdef _WIN32	1589	#ifdef _WIN32
1066	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1590	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1067	#else	1591	#else
1068	return fcntl (fd, F_GETFD) != -1;	1592	return fcntl (fd, F_GETFD) != -1;
1069	#endif	1593	#endif
1070	}	1594	}
1071		1595
1072	/* called on EBADF to verify fds */	1596	/* called on EBADF to verify fds */
1073	static void noinline	1597	static void noinline ecb_cold
1074	fd_ebadf (EV_P)	1598	fd_ebadf (EV_P)
1075	{	1599	{
1076	int fd;	1600	int fd;
1077		1601
1078	for (fd = 0; fd < anfdmax; ++fd)	1602	for (fd = 0; fd < anfdmax; ++fd)
…		…
1080	if (!fd_valid (fd) && errno == EBADF)	1604	if (!fd_valid (fd) && errno == EBADF)
1081	fd_kill (EV_A_ fd);	1605	fd_kill (EV_A_ fd);
1082	}	1606	}
1083		1607
1084	/* called on ENOMEM in select/poll to kill some fds and retry */	1608	/* called on ENOMEM in select/poll to kill some fds and retry */
1085	static void noinline	1609	static void noinline ecb_cold
1086	fd_enomem (EV_P)	1610	fd_enomem (EV_P)
1087	{	1611	{
1088	int fd;	1612	int fd;
1089		1613
1090	for (fd = anfdmax; fd--; )	1614	for (fd = anfdmax; fd--; )
…		…
1285		1809
1286	/*****************************************************************************/	1810	/*****************************************************************************/
1287		1811
1288	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1812	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1289		1813
1290	static void noinline	1814	static void noinline ecb_cold
1291	evpipe_init (EV_P)	1815	evpipe_init (EV_P)
1292	{	1816	{
1293	if (!ev_is_active (&pipe_w))	1817	if (!ev_is_active (&pipe_w))
1294	{	1818	{
1295	# if EV_USE_EVENTFD	1819	# if EV_USE_EVENTFD
…		…
1317	ev_io_start (EV_A_ &pipe_w);	1841	ev_io_start (EV_A_ &pipe_w);
1318	ev_unref (EV_A); /* watcher should not keep loop alive */	1842	ev_unref (EV_A); /* watcher should not keep loop alive */
1319	}	1843	}
1320	}	1844	}
1321		1845
1322	inline_size void	1846	inline_speed void
1323	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1847	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1324	{	1848	{
1325	if (!*flag)	1849	if (expect_true (*flag))
		1850	return;
		1851
		1852	*flag = 1;
		1853
		1854	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1855
		1856	pipe_write_skipped = 1;
		1857
		1858	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1859
		1860	if (pipe_write_wanted)
1326	{	1861	{
		1862	int old_errno;
		1863
		1864	pipe_write_skipped = 0; /* just an optimisation, no fence needed */
		1865
1327	int old_errno = errno; /* save errno because write might clobber it */	1866	old_errno = errno; /* save errno because write will clobber it */
1328	char dummy;
1329
1330	*flag = 1;
1331		1867
1332	#if EV_USE_EVENTFD	1868	#if EV_USE_EVENTFD
1333	if (evfd >= 0)	1869	if (evfd >= 0)
1334	{	1870	{
1335	uint64_t counter = 1;	1871	uint64_t counter = 1;
1336	write (evfd, &counter, sizeof (uint64_t));	1872	write (evfd, &counter, sizeof (uint64_t));
1337	}	1873	}
1338	else	1874	else
1339	#endif	1875	#endif
		1876	{
1340	/* win32 people keep sending patches that change this write() to send() */	1877	/* win32 people keep sending patches that change this write() to send() */
1341	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1878	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1342	/* so when you think this write should be a send instead, please find out */	1879	/* so when you think this write should be a send instead, please find out */
1343	/* where your send() is from - it's definitely not the microsoft send, and */	1880	/* where your send() is from - it's definitely not the microsoft send, and */
1344	/* tell me. thank you. */	1881	/* tell me. thank you. */
		1882	/* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
		1883	/* check the ev documentation on how to use this flag */
1345	write (evpipe [1], &dummy, 1);	1884	write (evpipe [1], &(evpipe [1]), 1);
		1885	}
1346		1886
1347	errno = old_errno;	1887	errno = old_errno;
1348	}	1888	}
1349	}	1889	}
1350		1890
…		…
1353	static void	1893	static void
1354	pipecb (EV_P_ ev_io *iow, int revents)	1894	pipecb (EV_P_ ev_io *iow, int revents)
1355	{	1895	{
1356	int i;	1896	int i;
1357		1897
		1898	if (revents & EV_READ)
		1899	{
1358	#if EV_USE_EVENTFD	1900	#if EV_USE_EVENTFD
1359	if (evfd >= 0)	1901	if (evfd >= 0)
1360	{	1902	{
1361	uint64_t counter;	1903	uint64_t counter;
1362	read (evfd, &counter, sizeof (uint64_t));	1904	read (evfd, &counter, sizeof (uint64_t));
1363	}	1905	}
1364	else	1906	else
1365	#endif	1907	#endif
1366	{	1908	{
1367	char dummy;	1909	char dummy;
1368	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1910	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1369	read (evpipe [0], &dummy, 1);	1911	read (evpipe [0], &dummy, 1);
		1912	}
1370	}	1913	}
		1914
		1915	pipe_write_skipped = 0;
1371		1916
1372	#if EV_SIGNAL_ENABLE	1917	#if EV_SIGNAL_ENABLE
1373	if (sig_pending)	1918	if (sig_pending)
1374	{	1919	{
1375	sig_pending = 0;	1920	sig_pending = 0;
1376		1921
1377	for (i = EV_NSIG - 1; i--; )	1922	for (i = EV_NSIG - 1; i--; )
1378	if (expect_false (signals [i].pending))	1923	if (expect_false (signals [i].pending))
1379	ev_feed_signal_event (EV_A_ i + 1);	1924	ev_feed_signal_event (EV_A_ i + 1);
…		…
1404	EV_P = signals [signum - 1].loop;	1949	EV_P = signals [signum - 1].loop;
1405		1950
1406	if (!EV_A)	1951	if (!EV_A)
1407	return;	1952	return;
1408	#endif	1953	#endif
		1954
		1955	if (!ev_active (&pipe_w))
		1956	return;
1409		1957
1410	signals [signum - 1].pending = 1;	1958	signals [signum - 1].pending = 1;
1411	evpipe_write (EV_A_ &sig_pending);	1959	evpipe_write (EV_A_ &sig_pending);
1412	}	1960	}
1413		1961
…		…
1545	#endif	2093	#endif
1546	#if EV_USE_SELECT	2094	#if EV_USE_SELECT
1547	# include "ev_select.c"	2095	# include "ev_select.c"
1548	#endif	2096	#endif
1549		2097
1550	int	2098	int ecb_cold
1551	ev_version_major (void)	2099	ev_version_major (void)
1552	{	2100	{
1553	return EV_VERSION_MAJOR;	2101	return EV_VERSION_MAJOR;
1554	}	2102	}
1555		2103
1556	int	2104	int ecb_cold
1557	ev_version_minor (void)	2105	ev_version_minor (void)
1558	{	2106	{
1559	return EV_VERSION_MINOR;	2107	return EV_VERSION_MINOR;
1560	}	2108	}
1561		2109
1562	/* return true if we are running with elevated privileges and should ignore env variables */	2110	/* return true if we are running with elevated privileges and should ignore env variables */
1563	int inline_size	2111	int inline_size ecb_cold
1564	enable_secure (void)	2112	enable_secure (void)
1565	{	2113	{
1566	#ifdef _WIN32	2114	#ifdef _WIN32
1567	return 0;	2115	return 0;
1568	#else	2116	#else
1569	return getuid () != geteuid ()	2117	return getuid () != geteuid ()
1570	\|\| getgid () != getegid ();	2118	\|\| getgid () != getegid ();
1571	#endif	2119	#endif
1572	}	2120	}
1573		2121
1574	unsigned int	2122	unsigned int ecb_cold
1575	ev_supported_backends (void)	2123	ev_supported_backends (void)
1576	{	2124	{
1577	unsigned int flags = 0;	2125	unsigned int flags = 0;
1578		2126
1579	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	2127	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1583	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	2131	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1584		2132
1585	return flags;	2133	return flags;
1586	}	2134	}
1587		2135
1588	unsigned int	2136	unsigned int ecb_cold
1589	ev_recommended_backends (void)	2137	ev_recommended_backends (void)
1590	{	2138	{
1591	unsigned int flags = ev_supported_backends ();	2139	unsigned int flags = ev_supported_backends ();
1592		2140
1593	#ifndef __NetBSD__	2141	#ifndef __NetBSD__
…		…
1605	#endif	2153	#endif
1606		2154
1607	return flags;	2155	return flags;
1608	}	2156	}
1609		2157
1610	unsigned int	2158	unsigned int ecb_cold
1611	ev_embeddable_backends (void)	2159	ev_embeddable_backends (void)
1612	{	2160	{
1613	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	2161	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1614		2162
1615	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	2163	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1660	ev_userdata (EV_P)	2208	ev_userdata (EV_P)
1661	{	2209	{
1662	return userdata;	2210	return userdata;
1663	}	2211	}
1664		2212
		2213	void
1665	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	2214	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1666	{	2215	{
1667	invoke_cb = invoke_pending_cb;	2216	invoke_cb = invoke_pending_cb;
1668	}	2217	}
1669		2218
		2219	void
1670	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	2220	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1671	{	2221	{
1672	release_cb = release;	2222	release_cb = release;
1673	acquire_cb = acquire;	2223	acquire_cb = acquire;
1674	}	2224	}
1675	#endif	2225	#endif
1676		2226
1677	/* initialise a loop structure, must be zero-initialised */	2227	/* initialise a loop structure, must be zero-initialised */
1678	static void noinline	2228	static void noinline ecb_cold
1679	loop_init (EV_P_ unsigned int flags)	2229	loop_init (EV_P_ unsigned int flags)
1680	{	2230	{
1681	if (!backend)	2231	if (!backend)
1682	{	2232	{
1683	origflags = flags;	2233	origflags = flags;
…		…
1711	if (!(flags & EVFLAG_NOENV)	2261	if (!(flags & EVFLAG_NOENV)
1712	&& !enable_secure ()	2262	&& !enable_secure ()
1713	&& getenv ("LIBEV_FLAGS"))	2263	&& getenv ("LIBEV_FLAGS"))
1714	flags = atoi (getenv ("LIBEV_FLAGS"));	2264	flags = atoi (getenv ("LIBEV_FLAGS"));
1715		2265
1716	ev_rt_now = ev_time ();	2266	ev_rt_now = ev_time ();
1717	mn_now = get_clock ();	2267	mn_now = get_clock ();
1718	now_floor = mn_now;	2268	now_floor = mn_now;
1719	rtmn_diff = ev_rt_now - mn_now;	2269	rtmn_diff = ev_rt_now - mn_now;
1720	#if EV_FEATURE_API	2270	#if EV_FEATURE_API
1721	invoke_cb = ev_invoke_pending;	2271	invoke_cb = ev_invoke_pending;
1722	#endif	2272	#endif
1723		2273
1724	io_blocktime = 0.;	2274	io_blocktime = 0.;
1725	timeout_blocktime = 0.;	2275	timeout_blocktime = 0.;
1726	backend = 0;	2276	backend = 0;
1727	backend_fd = -1;	2277	backend_fd = -1;
1728	sig_pending = 0;	2278	sig_pending = 0;
1729	#if EV_ASYNC_ENABLE	2279	#if EV_ASYNC_ENABLE
1730	async_pending = 0;	2280	async_pending = 0;
1731	#endif	2281	#endif
		2282	pipe_write_skipped = 0;
		2283	pipe_write_wanted = 0;
1732	#if EV_USE_INOTIFY	2284	#if EV_USE_INOTIFY
1733	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	2285	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1734	#endif	2286	#endif
1735	#if EV_USE_SIGNALFD	2287	#if EV_USE_SIGNALFD
1736	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	2288	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1737	#endif	2289	#endif
1738		2290
1739	if (!(flags & EVBACKEND_MASK))	2291	if (!(flags & EVBACKEND_MASK))
1740	flags \|= ev_recommended_backends ();	2292	flags \|= ev_recommended_backends ();
1741		2293
…		…
1766	#endif	2318	#endif
1767	}	2319	}
1768	}	2320	}
1769		2321
1770	/* free up a loop structure */	2322	/* free up a loop structure */
1771	void	2323	void ecb_cold
1772	ev_loop_destroy (EV_P)	2324	ev_loop_destroy (EV_P)
1773	{	2325	{
1774	int i;	2326	int i;
1775		2327
1776	#if EV_MULTIPLICITY	2328	#if EV_MULTIPLICITY
…		…
1906	infy_fork (EV_A);	2458	infy_fork (EV_A);
1907	#endif	2459	#endif
1908		2460
1909	if (ev_is_active (&pipe_w))	2461	if (ev_is_active (&pipe_w))
1910	{	2462	{
1911	/* this "locks" the handlers against writing to the pipe */	2463	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1912	/* while we modify the fd vars */
1913	sig_pending = 1;
1914	#if EV_ASYNC_ENABLE
1915	async_pending = 1;
1916	#endif
1917		2464
1918	ev_ref (EV_A);	2465	ev_ref (EV_A);
1919	ev_io_stop (EV_A_ &pipe_w);	2466	ev_io_stop (EV_A_ &pipe_w);
1920		2467
1921	#if EV_USE_EVENTFD	2468	#if EV_USE_EVENTFD
…		…
1939	postfork = 0;	2486	postfork = 0;
1940	}	2487	}
1941		2488
1942	#if EV_MULTIPLICITY	2489	#if EV_MULTIPLICITY
1943		2490
1944	struct ev_loop *	2491	struct ev_loop * ecb_cold
1945	ev_loop_new (unsigned int flags)	2492	ev_loop_new (unsigned int flags)
1946	{	2493	{
1947	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2494	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1948		2495
1949	memset (EV_A, 0, sizeof (struct ev_loop));	2496	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1957	}	2504	}
1958		2505
1959	#endif /* multiplicity */	2506	#endif /* multiplicity */
1960		2507
1961	#if EV_VERIFY	2508	#if EV_VERIFY
1962	static void noinline	2509	static void noinline ecb_cold
1963	verify_watcher (EV_P_ W w)	2510	verify_watcher (EV_P_ W w)
1964	{	2511	{
1965	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2512	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1966		2513
1967	if (w->pending)	2514	if (w->pending)
1968	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2515	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1969	}	2516	}
1970		2517
1971	static void noinline	2518	static void noinline ecb_cold
1972	verify_heap (EV_P_ ANHE *heap, int N)	2519	verify_heap (EV_P_ ANHE *heap, int N)
1973	{	2520	{
1974	int i;	2521	int i;
1975		2522
1976	for (i = HEAP0; i < N + HEAP0; ++i)	2523	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1981		2528
1982	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2529	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1983	}	2530	}
1984	}	2531	}
1985		2532
1986	static void noinline	2533	static void noinline ecb_cold
1987	array_verify (EV_P_ W *ws, int cnt)	2534	array_verify (EV_P_ W *ws, int cnt)
1988	{	2535	{
1989	while (cnt--)	2536	while (cnt--)
1990	{	2537	{
1991	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2538	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1993	}	2540	}
1994	}	2541	}
1995	#endif	2542	#endif
1996		2543
1997	#if EV_FEATURE_API	2544	#if EV_FEATURE_API
1998	void	2545	void ecb_cold
1999	ev_verify (EV_P)	2546	ev_verify (EV_P)
2000	{	2547	{
2001	#if EV_VERIFY	2548	#if EV_VERIFY
2002	int i;	2549	int i;
2003	WL w;	2550	WL w;
…		…
2069	#endif	2616	#endif
2070	}	2617	}
2071	#endif	2618	#endif
2072		2619
2073	#if EV_MULTIPLICITY	2620	#if EV_MULTIPLICITY
2074	struct ev_loop *	2621	struct ev_loop * ecb_cold
2075	#else	2622	#else
2076	int	2623	int
2077	#endif	2624	#endif
2078	ev_default_loop (unsigned int flags)	2625	ev_default_loop (unsigned int flags)
2079	{	2626	{
…		…
2208	}	2755	}
2209	}	2756	}
2210		2757
2211	#if EV_PERIODIC_ENABLE	2758	#if EV_PERIODIC_ENABLE
2212		2759
2213	inline_speed void	2760	static void noinline
2214	periodic_recalc (EV_P_ ev_periodic *w)	2761	periodic_recalc (EV_P_ ev_periodic *w)
2215	{	2762	{
2216	/* TODO: use slow but potentially more correct incremental algo, */	2763	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2217	/* also do not rely on ceil */	2764	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2218	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2765
		2766	/* the above almost always errs on the low side */
		2767	while (at <= ev_rt_now)
		2768	{
		2769	ev_tstamp nat = at + w->interval;
		2770
		2771	/* when resolution fails us, we use ev_rt_now */
		2772	if (expect_false (nat == at))
		2773	{
		2774	at = ev_rt_now;
		2775	break;
		2776	}
		2777
		2778	at = nat;
		2779	}
		2780
		2781	ev_at (w) = at;
2219	}	2782	}
2220		2783
2221	/* make periodics pending */	2784	/* make periodics pending */
2222	inline_size void	2785	inline_size void
2223	periodics_reify (EV_P)	2786	periodics_reify (EV_P)
…		…
2245	downheap (periodics, periodiccnt, HEAP0);	2808	downheap (periodics, periodiccnt, HEAP0);
2246	}	2809	}
2247	else if (w->interval)	2810	else if (w->interval)
2248	{	2811	{
2249	periodic_recalc (EV_A_ w);	2812	periodic_recalc (EV_A_ w);
2250
2251	/* if next trigger time is not sufficiently in the future, put it there */
2252	/* this might happen because of floating point inexactness */
2253	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2254	{
2255	ev_at (w) += w->interval;
2256
2257	/* if interval is unreasonably low we might still have a time in the past */
2258	/* so correct this. this will make the periodic very inexact, but the user */
2259	/* has effectively asked to get triggered more often than possible */
2260	if (ev_at (w) < ev_rt_now)
2261	ev_at (w) = ev_rt_now;
2262	}
2263
2264	ANHE_at_cache (periodics [HEAP0]);	2813	ANHE_at_cache (periodics [HEAP0]);
2265	downheap (periodics, periodiccnt, HEAP0);	2814	downheap (periodics, periodiccnt, HEAP0);
2266	}	2815	}
2267	else	2816	else
2268	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2817	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2276	}	2825	}
2277	}	2826	}
2278		2827
2279	/* simply recalculate all periodics */	2828	/* simply recalculate all periodics */
2280	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2829	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2281	static void noinline	2830	static void noinline ecb_cold
2282	periodics_reschedule (EV_P)	2831	periodics_reschedule (EV_P)
2283	{	2832	{
2284	int i;	2833	int i;
2285		2834
2286	/* adjust periodics after time jump */	2835	/* adjust periodics after time jump */
…		…
2299	reheap (periodics, periodiccnt);	2848	reheap (periodics, periodiccnt);
2300	}	2849	}
2301	#endif	2850	#endif
2302		2851
2303	/* adjust all timers by a given offset */	2852	/* adjust all timers by a given offset */
2304	static void noinline	2853	static void noinline ecb_cold
2305	timers_reschedule (EV_P_ ev_tstamp adjust)	2854	timers_reschedule (EV_P_ ev_tstamp adjust)
2306	{	2855	{
2307	int i;	2856	int i;
2308		2857
2309	for (i = 0; i < timercnt; ++i)	2858	for (i = 0; i < timercnt; ++i)
…		…
2346	* doesn't hurt either as we only do this on time-jumps or	2895	* doesn't hurt either as we only do this on time-jumps or
2347	* in the unlikely event of having been preempted here.	2896	* in the unlikely event of having been preempted here.
2348	*/	2897	*/
2349	for (i = 4; --i; )	2898	for (i = 4; --i; )
2350	{	2899	{
		2900	ev_tstamp diff;
2351	rtmn_diff = ev_rt_now - mn_now;	2901	rtmn_diff = ev_rt_now - mn_now;
2352		2902
		2903	diff = odiff - rtmn_diff;
		2904
2353	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2905	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2354	return; /* all is well */	2906	return; /* all is well */
2355		2907
2356	ev_rt_now = ev_time ();	2908	ev_rt_now = ev_time ();
2357	mn_now = get_clock ();	2909	mn_now = get_clock ();
2358	now_floor = mn_now;	2910	now_floor = mn_now;
…		…
2380		2932
2381	mn_now = ev_rt_now;	2933	mn_now = ev_rt_now;
2382	}	2934	}
2383	}	2935	}
2384		2936
2385	void	2937	int
2386	ev_run (EV_P_ int flags)	2938	ev_run (EV_P_ int flags)
2387	{	2939	{
2388	#if EV_FEATURE_API	2940	#if EV_FEATURE_API
2389	++loop_depth;	2941	++loop_depth;
2390	#endif	2942	#endif
…		…
2448	ev_tstamp prev_mn_now = mn_now;	3000	ev_tstamp prev_mn_now = mn_now;
2449		3001
2450	/* update time to cancel out callback processing overhead */	3002	/* update time to cancel out callback processing overhead */
2451	time_update (EV_A_ 1e100);	3003	time_update (EV_A_ 1e100);
2452		3004
		3005	/* from now on, we want a pipe-wake-up */
		3006	pipe_write_wanted = 1;
		3007
		3008	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		3009
2453	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	3010	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2454	{	3011	{
2455	waittime = MAX_BLOCKTIME;	3012	waittime = MAX_BLOCKTIME;
2456		3013
2457	if (timercnt)	3014	if (timercnt)
2458	{	3015	{
2459	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	3016	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2460	if (waittime > to) waittime = to;	3017	if (waittime > to) waittime = to;
2461	}	3018	}
2462		3019
2463	#if EV_PERIODIC_ENABLE	3020	#if EV_PERIODIC_ENABLE
2464	if (periodiccnt)	3021	if (periodiccnt)
2465	{	3022	{
2466	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	3023	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2467	if (waittime > to) waittime = to;	3024	if (waittime > to) waittime = to;
2468	}	3025	}
2469	#endif	3026	#endif
2470		3027
2471	/* don't let timeouts decrease the waittime below timeout_blocktime */	3028	/* don't let timeouts decrease the waittime below timeout_blocktime */
2472	if (expect_false (waittime < timeout_blocktime))	3029	if (expect_false (waittime < timeout_blocktime))
2473	waittime = timeout_blocktime;	3030	waittime = timeout_blocktime;
		3031
		3032	/* at this point, we NEED to wait, so we have to ensure */
		3033	/* to pass a minimum nonzero value to the backend */
		3034	if (expect_false (waittime < backend_mintime))
		3035	waittime = backend_mintime;
2474		3036
2475	/* extra check because io_blocktime is commonly 0 */	3037	/* extra check because io_blocktime is commonly 0 */
2476	if (expect_false (io_blocktime))	3038	if (expect_false (io_blocktime))
2477	{	3039	{
2478	sleeptime = io_blocktime - (mn_now - prev_mn_now);	3040	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2479		3041
2480	if (sleeptime > waittime - backend_fudge)	3042	if (sleeptime > waittime - backend_mintime)
2481	sleeptime = waittime - backend_fudge;	3043	sleeptime = waittime - backend_mintime;
2482		3044
2483	if (expect_true (sleeptime > 0.))	3045	if (expect_true (sleeptime > 0.))
2484	{	3046	{
2485	ev_sleep (sleeptime);	3047	ev_sleep (sleeptime);
2486	waittime -= sleeptime;	3048	waittime -= sleeptime;
…		…
2493	#endif	3055	#endif
2494	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	3056	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2495	backend_poll (EV_A_ waittime);	3057	backend_poll (EV_A_ waittime);
2496	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	3058	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2497		3059
		3060	pipe_write_wanted = 0; /* just an optimisation, no fence needed */
		3061
		3062	if (pipe_write_skipped)
		3063	{
		3064	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		3065	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		3066	}
		3067
		3068
2498	/* update ev_rt_now, do magic */	3069	/* update ev_rt_now, do magic */
2499	time_update (EV_A_ waittime + sleeptime);	3070	time_update (EV_A_ waittime + sleeptime);
2500	}	3071	}
2501		3072
2502	/* queue pending timers and reschedule them */	3073	/* queue pending timers and reschedule them */
…		…
2528	loop_done = EVBREAK_CANCEL;	3099	loop_done = EVBREAK_CANCEL;
2529		3100
2530	#if EV_FEATURE_API	3101	#if EV_FEATURE_API
2531	--loop_depth;	3102	--loop_depth;
2532	#endif	3103	#endif
		3104
		3105	return activecnt;
2533	}	3106	}
2534		3107
2535	void	3108	void
2536	ev_break (EV_P_ int how)	3109	ev_break (EV_P_ int how)
2537	{	3110	{
…		…
2752		3325
2753	void noinline	3326	void noinline
2754	ev_timer_again (EV_P_ ev_timer *w)	3327	ev_timer_again (EV_P_ ev_timer *w)
2755	{	3328	{
2756	EV_FREQUENT_CHECK;	3329	EV_FREQUENT_CHECK;
		3330
		3331	clear_pending (EV_A_ (W)w);
2757		3332
2758	if (ev_is_active (w))	3333	if (ev_is_active (w))
2759	{	3334	{
2760	if (w->repeat)	3335	if (w->repeat)
2761	{	3336	{
…		…
3078	if (!pend \|\| pend == path)	3653	if (!pend \|\| pend == path)
3079	break;	3654	break;
3080		3655
3081	*pend = 0;	3656	*pend = 0;
3082	w->wd = inotify_add_watch (fs_fd, path, mask);	3657	w->wd = inotify_add_watch (fs_fd, path, mask);
3083	}	3658	}
3084	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3659	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3085	}	3660	}
3086	}	3661	}
3087		3662
3088	if (w->wd >= 0)	3663	if (w->wd >= 0)
…		…
3155	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3730	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3156	ofs += sizeof (struct inotify_event) + ev->len;	3731	ofs += sizeof (struct inotify_event) + ev->len;
3157	}	3732	}
3158	}	3733	}
3159		3734
3160	inline_size void	3735	inline_size void ecb_cold
3161	ev_check_2625 (EV_P)	3736	ev_check_2625 (EV_P)
3162	{	3737	{
3163	/* kernels < 2.6.25 are borked	3738	/* kernels < 2.6.25 are borked
3164	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3739	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3165	*/	3740	*/
…		…
3170	}	3745	}
3171		3746
3172	inline_size int	3747	inline_size int
3173	infy_newfd (void)	3748	infy_newfd (void)
3174	{	3749	{
3175	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)	3750	#if defined IN_CLOEXEC && defined IN_NONBLOCK
3176	int fd = inotify_init1 (IN_CLOEXEC \| IN_NONBLOCK);	3751	int fd = inotify_init1 (IN_CLOEXEC \| IN_NONBLOCK);
3177	if (fd >= 0)	3752	if (fd >= 0)
3178	return fd;	3753	return fd;
3179	#endif	3754	#endif
3180	return inotify_init ();	3755	return inotify_init ();
…		…
3790	}	4365	}
3791		4366
3792	/*****************************************************************************/	4367	/*****************************************************************************/
3793		4368
3794	#if EV_WALK_ENABLE	4369	#if EV_WALK_ENABLE
3795	void	4370	void ecb_cold
3796	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	4371	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3797	{	4372	{
3798	int i, j;	4373	int i, j;
3799	ev_watcher_list wl, wn;	4374	ev_watcher_list wl, wn;
3800		4375
…		…
3844	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));	4419	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3845	#endif	4420	#endif
3846		4421
3847	#if EV_IDLE_ENABLE	4422	#if EV_IDLE_ENABLE
3848	if (types & EV_IDLE)	4423	if (types & EV_IDLE)
3849	for (j = NUMPRI; i--; )	4424	for (j = NUMPRI; j--; )
3850	for (i = idlecnt [j]; i--; )	4425	for (i = idlecnt [j]; i--; )
3851	cb (EV_A_ EV_IDLE, idles [j][i]);	4426	cb (EV_A_ EV_IDLE, idles [j][i]);
3852	#endif	4427	#endif
3853		4428
3854	#if EV_FORK_ENABLE	4429	#if EV_FORK_ENABLE
…		…
3907		4482
3908	#if EV_MULTIPLICITY	4483	#if EV_MULTIPLICITY
3909	#include "ev_wrap.h"	4484	#include "ev_wrap.h"
3910	#endif	4485	#endif
3911		4486
3912	EV_CPP(})
3913

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Comparing libev/ev.c (file contents): Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs. Revision 1.419 by root, Thu Apr 12 04:10:15 2012 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs.
Revision 1.419 by root, Thu Apr 12 04:10:15 2012 UTC