[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 1.394 by root, Thu Aug 4 14:49:27 2011 UTC

…		…
4	* Copyright (c) 2007,2008,2009,2010,2011 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,
…		…
42	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
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
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
47		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
…		…
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
…		…
232	/* to make it compile regardless, just remove the above line, */	237	/* to make it compile regardless, just remove the above line, */
233	/* but consider reporting it, too! :) */	238	/* but consider reporting it, too! :) */
234	# define EV_NSIG 65	239	# define EV_NSIG 65
235	#endif	240	#endif
236		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
237	#ifndef EV_USE_CLOCK_SYSCALL	246	#ifndef EV_USE_CLOCK_SYSCALL
238	# if __linux && __GLIBC__ >= 2	247	# if __linux && __GLIBC__ >= 2
239	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS	248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240	# else	249	# else
241	# define EV_USE_CLOCK_SYSCALL 0	250	# define EV_USE_CLOCK_SYSCALL 0
…		…
443	#else	452	#else
444	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
445	#endif	454	#endif
446		455
447	/*	456	/*
448	* This is used to avoid floating point rounding problems.	457	* 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.	458	* This value is good at least till the year 4000.
453	* Better solutions welcome.
454	*/	459	*/
455	#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 /
456		462
457	#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) */
458	#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) */
459		465
460	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)	466	#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)	467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462		468
		469	/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
		470	/* ECB.H BEGIN */
		471	/*
		472	* libecb - http://software.schmorp.de/pkg/libecb
		473	*
		474	* Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
		475	* Copyright (©) 2011 Emanuele Giaquinta
		476	* All rights reserved.
		477	*
		478	* Redistribution and use in source and binary forms, with or without modifica-
		479	* tion, are permitted provided that the following conditions are met:
		480	*
		481	* 1. Redistributions of source code must retain the above copyright notice,
		482	* this list of conditions and the following disclaimer.
		483	*
		484	* 2. Redistributions in binary form must reproduce the above copyright
		485	* notice, this list of conditions and the following disclaimer in the
		486	* documentation and/or other materials provided with the distribution.
		487	*
		488	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		489	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		490	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		491	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		492	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		493	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		494	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		495	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		496	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		497	* OF THE POSSIBILITY OF SUCH DAMAGE.
		498	*/
		499
		500	#ifndef ECB_H
		501	#define ECB_H
		502
		503	#ifdef _WIN32
		504	typedef signed char int8_t;
		505	typedef unsigned char uint8_t;
		506	typedef signed short int16_t;
		507	typedef unsigned short uint16_t;
		508	typedef signed int int32_t;
		509	typedef unsigned int uint32_t;
463	#if __GNUC__ >= 4	510	#if __GNUC__
464	# define expect(expr,value) __builtin_expect ((expr),(value))	511	typedef signed long long int64_t;
465	# define noinline __attribute__ ((noinline))	512	typedef unsigned long long uint64_t;
		513	#else /* _MSC_VER \|\| __BORLANDC__ */
		514	typedef signed __int64 int64_t;
		515	typedef unsigned __int64 uint64_t;
		516	#endif
466	#else	517	#else
467	# define expect(expr,value) (expr)	518	#include <inttypes.h>
468	# define noinline
469	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470	# define inline
471	# endif	519	#endif
		520
		521	/* many compilers define _GNUC_ to some versions but then only implement
		522	* what their idiot authors think are the "more important" extensions,
		523	* causing enormous grief in return for some better fake benchmark numbers.
		524	* or so.
		525	* we try to detect these and simply assume they are not gcc - if they have
		526	* an issue with that they should have done it right in the first place.
		527	*/
		528	#ifndef ECB_GCC_VERSION
		529	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)
		530	#define ECB_GCC_VERSION(major,minor) 0
		531	#else
		532	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
472	#endif	533	#endif
		534	#endif
473		535
		536	/*****************************************************************************/
		537
		538	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		539	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		540
		541	#if ECB_NO_THREADS \|\| ECB_NO_SMP
		542	#define ECB_MEMORY_FENCE do { } while (0)
		543	#endif
		544
		545	#ifndef ECB_MEMORY_FENCE
		546	#if ECB_GCC_VERSION(2,5)
		547	#if __x86
		548	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		549	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		550	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		551	#elif __amd64
		552	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		553	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		554	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		555	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		556	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		557	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \
		558	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__)
		559	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		560	#elif defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \
		561	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )
		562	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		563	#endif
		564	#endif
		565	#endif
		566
		567	#ifndef ECB_MEMORY_FENCE
		568	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER)
		569	#define ECB_MEMORY_FENCE __sync_synchronize ()
		570	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		571	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		572	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		573	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		574	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		575	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		576	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		577	#elif defined(_WIN32)
		578	#include <WinNT.h>
		579	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		580	#endif
		581	#endif
		582
		583	#ifndef ECB_MEMORY_FENCE
		584	#if !ECB_AVOID_PTHREADS
		585	/*
		586	* if you get undefined symbol references to pthread_mutex_lock,
		587	* or failure to find pthread.h, then you should implement
		588	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		589	* OR provide pthread.h and link against the posix thread library
		590	* of your system.
		591	*/
		592	#include <pthread.h>
		593	#define ECB_NEEDS_PTHREADS 1
		594	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		595
		596	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		597	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		598	#endif
		599	#endif
		600
		601	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
		602	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		603	#endif
		604
		605	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
		606	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		607	#endif
		608
		609	/*****************************************************************************/
		610
		611	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		612
		613	#if __cplusplus
		614	#define ecb_inline static inline
		615	#elif ECB_GCC_VERSION(2,5)
		616	#define ecb_inline static __inline__
		617	#elif ECB_C99
		618	#define ecb_inline static inline
		619	#else
		620	#define ecb_inline static
		621	#endif
		622
		623	#if ECB_GCC_VERSION(3,3)
		624	#define ecb_restrict __restrict__
		625	#elif ECB_C99
		626	#define ecb_restrict restrict
		627	#else
		628	#define ecb_restrict
		629	#endif
		630
		631	typedef int ecb_bool;
		632
		633	#define ECB_CONCAT_(a, b) a ## b
		634	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
		635	#define ECB_STRINGIFY_(a) # a
		636	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		637
		638	#define ecb_function_ ecb_inline
		639
		640	#if ECB_GCC_VERSION(3,1)
		641	#define ecb_attribute(attrlist) __attribute__(attrlist)
		642	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		643	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		644	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		645	#else
		646	#define ecb_attribute(attrlist)
		647	#define ecb_is_constant(expr) 0
		648	#define ecb_expect(expr,value) (expr)
		649	#define ecb_prefetch(addr,rw,locality)
		650	#endif
		651
		652	/* no emulation for ecb_decltype */
		653	#if ECB_GCC_VERSION(4,5)
		654	#define ecb_decltype(x) __decltype(x)
		655	#elif ECB_GCC_VERSION(3,0)
		656	#define ecb_decltype(x) __typeof(x)
		657	#endif
		658
		659	#define ecb_noinline ecb_attribute ((__noinline__))
		660	#define ecb_noreturn ecb_attribute ((__noreturn__))
		661	#define ecb_unused ecb_attribute ((__unused__))
		662	#define ecb_const ecb_attribute ((__const__))
		663	#define ecb_pure ecb_attribute ((__pure__))
		664
		665	#if ECB_GCC_VERSION(4,3)
		666	#define ecb_artificial ecb_attribute ((__artificial__))
		667	#define ecb_hot ecb_attribute ((__hot__))
		668	#define ecb_cold ecb_attribute ((__cold__))
		669	#else
		670	#define ecb_artificial
		671	#define ecb_hot
		672	#define ecb_cold
		673	#endif
		674
		675	/* put around conditional expressions if you are very sure that the */
		676	/* expression is mostly true or mostly false. note that these return */
		677	/* booleans, not the expression. */
474	#define expect_false(expr) expect ((expr) != 0, 0)	678	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475	#define expect_true(expr) expect ((expr) != 0, 1)	679	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		680	/* for compatibility to the rest of the world */
		681	#define ecb_likely(expr) ecb_expect_true (expr)
		682	#define ecb_unlikely(expr) ecb_expect_false (expr)
		683
		684	/* count trailing zero bits and count # of one bits */
		685	#if ECB_GCC_VERSION(3,4)
		686	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		687	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		688	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		689	#define ecb_ctz32(x) __builtin_ctz (x)
		690	#define ecb_ctz64(x) __builtin_ctzll (x)
		691	#define ecb_popcount32(x) __builtin_popcount (x)
		692	/* no popcountll */
		693	#else
		694	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		695	ecb_function_ int
		696	ecb_ctz32 (uint32_t x)
		697	{
		698	int r = 0;
		699
		700	x &= ~x + 1; /* this isolates the lowest bit */
		701
		702	#if ECB_branchless_on_i386
		703	r += !!(x & 0xaaaaaaaa) << 0;
		704	r += !!(x & 0xcccccccc) << 1;
		705	r += !!(x & 0xf0f0f0f0) << 2;
		706	r += !!(x & 0xff00ff00) << 3;
		707	r += !!(x & 0xffff0000) << 4;
		708	#else
		709	if (x & 0xaaaaaaaa) r += 1;
		710	if (x & 0xcccccccc) r += 2;
		711	if (x & 0xf0f0f0f0) r += 4;
		712	if (x & 0xff00ff00) r += 8;
		713	if (x & 0xffff0000) r += 16;
		714	#endif
		715
		716	return r;
		717	}
		718
		719	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		720	ecb_function_ int
		721	ecb_ctz64 (uint64_t x)
		722	{
		723	int shift = x & 0xffffffffU ? 0 : 32;
		724	return ecb_ctz32 (x >> shift) + shift;
		725	}
		726
		727	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		728	ecb_function_ int
		729	ecb_popcount32 (uint32_t x)
		730	{
		731	x -= (x >> 1) & 0x55555555;
		732	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		733	x = ((x >> 4) + x) & 0x0f0f0f0f;
		734	x *= 0x01010101;
		735
		736	return x >> 24;
		737	}
		738
		739	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		740	ecb_function_ int ecb_ld32 (uint32_t x)
		741	{
		742	int r = 0;
		743
		744	if (x >> 16) { x >>= 16; r += 16; }
		745	if (x >> 8) { x >>= 8; r += 8; }
		746	if (x >> 4) { x >>= 4; r += 4; }
		747	if (x >> 2) { x >>= 2; r += 2; }
		748	if (x >> 1) { r += 1; }
		749
		750	return r;
		751	}
		752
		753	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		754	ecb_function_ int ecb_ld64 (uint64_t x)
		755	{
		756	int r = 0;
		757
		758	if (x >> 32) { x >>= 32; r += 32; }
		759
		760	return r + ecb_ld32 (x);
		761	}
		762	#endif
		763
		764	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		765	/* so for this version we are lazy */
		766	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		767	ecb_function_ int
		768	ecb_popcount64 (uint64_t x)
		769	{
		770	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		771	}
		772
		773	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		774	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		775	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		776	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		777	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		778	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		779	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		780	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		781
		782	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		783	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		784	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		785	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		786	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		787	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		788	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		789	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		790
		791	#if ECB_GCC_VERSION(4,3)
		792	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		793	#define ecb_bswap32(x) __builtin_bswap32 (x)
		794	#define ecb_bswap64(x) __builtin_bswap64 (x)
		795	#else
		796	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		797	ecb_function_ uint16_t
		798	ecb_bswap16 (uint16_t x)
		799	{
		800	return ecb_rotl16 (x, 8);
		801	}
		802
		803	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		804	ecb_function_ uint32_t
		805	ecb_bswap32 (uint32_t x)
		806	{
		807	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		808	}
		809
		810	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		811	ecb_function_ uint64_t
		812	ecb_bswap64 (uint64_t x)
		813	{
		814	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		815	}
		816	#endif
		817
		818	#if ECB_GCC_VERSION(4,5)
		819	#define ecb_unreachable() __builtin_unreachable ()
		820	#else
		821	/* this seems to work fine, but gcc always emits a warning for it :/ */
		822	ecb_function_ void ecb_unreachable (void) ecb_noreturn;
		823	ecb_function_ void ecb_unreachable (void) { }
		824	#endif
		825
		826	/* try to tell the compiler that some condition is definitely true */
		827	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
		828
		829	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
		830	ecb_function_ unsigned char
		831	ecb_byteorder_helper (void)
		832	{
		833	const uint32_t u = 0x11223344;
		834	return (unsigned char )&u;
		835	}
		836
		837	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
		838	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
		839	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
		840	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
		841
		842	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		843	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		844	#else
		845	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		846	#endif
		847
		848	#if ecb_cplusplus_does_not_suck
		849	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
		850	template<typename T, int N>
		851	static inline int ecb_array_length (const T (&arr)[N])
		852	{
		853	return N;
		854	}
		855	#else
		856	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		857	#endif
		858
		859	#endif
		860
		861	/* ECB.H END */
		862
		863	#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
		864	# undef ECB_MEMORY_FENCE
		865	# undef ECB_MEMORY_FENCE_ACQUIRE
		866	# undef ECB_MEMORY_FENCE_RELEASE
		867	#endif
		868
		869	#define expect_false(cond) ecb_expect_false (cond)
		870	#define expect_true(cond) ecb_expect_true (cond)
		871	#define noinline ecb_noinline
		872
476	#define inline_size static inline	873	#define inline_size ecb_inline
477		874
478	#if EV_FEATURE_CODE	875	#if EV_FEATURE_CODE
479	# define inline_speed static inline	876	# define inline_speed ecb_inline
480	#else	877	#else
481	# define inline_speed static noinline	878	# define inline_speed static noinline
482	#endif	879	#endif
483		880
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	881	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	920	# include "ev_win32.c"
524	#endif	921	#endif
525		922
526	/*****************************************************************************/	923	/*****************************************************************************/
527		924
		925	/* define a suitable floor function (only used by periodics atm) */
		926
		927	#if EV_USE_FLOOR
		928	# include <math.h>
		929	# define ev_floor(v) floor (v)
		930	#else
		931
		932	#include <float.h>
		933
		934	/* a floor() replacement function, should be independent of ev_tstamp type */
		935	static ev_tstamp noinline
		936	ev_floor (ev_tstamp v)
		937	{
		938	/* the choice of shift factor is not terribly important */
		939	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		940	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		941	#else
		942	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		943	#endif
		944
		945	/* argument too large for an unsigned long? */
		946	if (expect_false (v >= shift))
		947	{
		948	ev_tstamp f;
		949
		950	if (v == v - 1.)
		951	return v; /* very large number */
		952
		953	f = shift * ev_floor (v * (1. / shift));
		954	return f + ev_floor (v - f);
		955	}
		956
		957	/* special treatment for negative args? */
		958	if (expect_false (v < 0.))
		959	{
		960	ev_tstamp f = -ev_floor (-v);
		961
		962	return f - (f == v ? 0 : 1);
		963	}
		964
		965	/* fits into an unsigned long */
		966	return (unsigned long)v;
		967	}
		968
		969	#endif
		970
		971	/*****************************************************************************/
		972
528	#ifdef __linux	973	#ifdef __linux
529	# include <sys/utsname.h>	974	# include <sys/utsname.h>
530	#endif	975	#endif
531		976
532	static unsigned int noinline	977	static unsigned int noinline ecb_cold
533	ev_linux_version (void)	978	ev_linux_version (void)
534	{	979	{
535	#ifdef __linux	980	#ifdef __linux
536	unsigned int v = 0;	981	unsigned int v = 0;
537	struct utsname buf;	982	struct utsname buf;
…		…
566	}	1011	}
567		1012
568	/*****************************************************************************/	1013	/*****************************************************************************/
569		1014
570	#if EV_AVOID_STDIO	1015	#if EV_AVOID_STDIO
571	static void noinline	1016	static void noinline ecb_cold
572	ev_printerr (const char *msg)	1017	ev_printerr (const char *msg)
573	{	1018	{
574	write (STDERR_FILENO, msg, strlen (msg));	1019	write (STDERR_FILENO, msg, strlen (msg));
575	}	1020	}
576	#endif	1021	#endif
577		1022
578	static void (syserr_cb)(const char msg);	1023	static void (syserr_cb)(const char msg);
579		1024
580	void	1025	void ecb_cold
581	ev_set_syserr_cb (void (cb)(const char msg))	1026	ev_set_syserr_cb (void (cb)(const char msg))
582	{	1027	{
583	syserr_cb = cb;	1028	syserr_cb = cb;
584	}	1029	}
585		1030
586	static void noinline	1031	static void noinline ecb_cold
587	ev_syserr (const char *msg)	1032	ev_syserr (const char *msg)
588	{	1033	{
589	if (!msg)	1034	if (!msg)
590	msg = "(libev) system error";	1035	msg = "(libev) system error";
591		1036
…		…
624	#endif	1069	#endif
625	}	1070	}
626		1071
627	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	1072	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
628		1073
629	void	1074	void ecb_cold
630	ev_set_allocator (void (cb)(void *ptr, long size))	1075	ev_set_allocator (void (cb)(void *ptr, long size))
631	{	1076	{
632	alloc = cb;	1077	alloc = cb;
633	}	1078	}
634		1079
…		…
816	select (0, 0, 0, 0, &tv);	1261	select (0, 0, 0, 0, &tv);
817	#endif	1262	#endif
818	}	1263	}
819	}	1264	}
820		1265
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	/*****************************************************************************/	1266	/*****************************************************************************/
830		1267
831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	1268	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
832		1269
833	/* find a suitable new size for the given array, */	1270	/* find a suitable new size for the given array, */
…		…
851	}	1288	}
852		1289
853	return ncur;	1290	return ncur;
854	}	1291	}
855		1292
856	static noinline void *	1293	static void * noinline ecb_cold
857	array_realloc (int elem, void base, int cur, int cnt)	1294	array_realloc (int elem, void base, int cur, int cnt)
858	{	1295	{
859	cur = array_nextsize (elem, cur, cnt);	1296	cur = array_nextsize (elem, cur, cnt);
860	return ev_realloc (base, elem * *cur);	1297	return ev_realloc (base, elem * *cur);
861	}	1298	}
…		…
864	memset ((void )(base), 0, sizeof ((base)) * (count))	1301	memset ((void )(base), 0, sizeof ((base)) * (count))
865		1302
866	#define array_needsize(type,base,cur,cnt,init) \	1303	#define array_needsize(type,base,cur,cnt,init) \
867	if (expect_false ((cnt) > (cur))) \	1304	if (expect_false ((cnt) > (cur))) \
868	{ \	1305	{ \
869	int ocur_ = (cur); \	1306	int ecb_unused ocur_ = (cur); \
870	(base) = (type *)array_realloc \	1307	(base) = (type *)array_realloc \
871	(sizeof (type), (base), &(cur), (cnt)); \	1308	(sizeof (type), (base), &(cur), (cnt)); \
872	init ((base) + (ocur_), (cur) - ocur_); \	1309	init ((base) + (ocur_), (cur) - ocur_); \
873	}	1310	}
874		1311
…		…
980	for (i = 0; i < fdchangecnt; ++i)	1417	for (i = 0; i < fdchangecnt; ++i)
981	{	1418	{
982	int fd = fdchanges [i];	1419	int fd = fdchanges [i];
983	ANFD *anfd = anfds + fd;	1420	ANFD *anfd = anfds + fd;
984		1421
985	if (anfd->reify & EV__IOFDSET)	1422	if (anfd->reify & EV__IOFDSET && anfd->head)
986	{	1423	{
987	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);	1424	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
988		1425
989	if (handle != anfd->handle)	1426	if (handle != anfd->handle)
990	{	1427	{
…		…
1044	fdchanges [fdchangecnt - 1] = fd;	1481	fdchanges [fdchangecnt - 1] = fd;
1045	}	1482	}
1046	}	1483	}
1047		1484
1048	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1485	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1049	inline_speed void	1486	inline_speed void ecb_cold
1050	fd_kill (EV_P_ int fd)	1487	fd_kill (EV_P_ int fd)
1051	{	1488	{
1052	ev_io *w;	1489	ev_io *w;
1053		1490
1054	while ((w = (ev_io *)anfds [fd].head))	1491	while ((w = (ev_io *)anfds [fd].head))
…		…
1057	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1494	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1058	}	1495	}
1059	}	1496	}
1060		1497
1061	/* check whether the given fd is actually valid, for error recovery */	1498	/* check whether the given fd is actually valid, for error recovery */
1062	inline_size int	1499	inline_size int ecb_cold
1063	fd_valid (int fd)	1500	fd_valid (int fd)
1064	{	1501	{
1065	#ifdef _WIN32	1502	#ifdef _WIN32
1066	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1503	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1067	#else	1504	#else
1068	return fcntl (fd, F_GETFD) != -1;	1505	return fcntl (fd, F_GETFD) != -1;
1069	#endif	1506	#endif
1070	}	1507	}
1071		1508
1072	/* called on EBADF to verify fds */	1509	/* called on EBADF to verify fds */
1073	static void noinline	1510	static void noinline ecb_cold
1074	fd_ebadf (EV_P)	1511	fd_ebadf (EV_P)
1075	{	1512	{
1076	int fd;	1513	int fd;
1077		1514
1078	for (fd = 0; fd < anfdmax; ++fd)	1515	for (fd = 0; fd < anfdmax; ++fd)
…		…
1080	if (!fd_valid (fd) && errno == EBADF)	1517	if (!fd_valid (fd) && errno == EBADF)
1081	fd_kill (EV_A_ fd);	1518	fd_kill (EV_A_ fd);
1082	}	1519	}
1083		1520
1084	/* called on ENOMEM in select/poll to kill some fds and retry */	1521	/* called on ENOMEM in select/poll to kill some fds and retry */
1085	static void noinline	1522	static void noinline ecb_cold
1086	fd_enomem (EV_P)	1523	fd_enomem (EV_P)
1087	{	1524	{
1088	int fd;	1525	int fd;
1089		1526
1090	for (fd = anfdmax; fd--; )	1527	for (fd = anfdmax; fd--; )
…		…
1285		1722
1286	/*****************************************************************************/	1723	/*****************************************************************************/
1287		1724
1288	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1725	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1289		1726
1290	static void noinline	1727	static void noinline ecb_cold
1291	evpipe_init (EV_P)	1728	evpipe_init (EV_P)
1292	{	1729	{
1293	if (!ev_is_active (&pipe_w))	1730	if (!ev_is_active (&pipe_w))
1294	{	1731	{
1295	# if EV_USE_EVENTFD	1732	# if EV_USE_EVENTFD
…		…
1317	ev_io_start (EV_A_ &pipe_w);	1754	ev_io_start (EV_A_ &pipe_w);
1318	ev_unref (EV_A); /* watcher should not keep loop alive */	1755	ev_unref (EV_A); /* watcher should not keep loop alive */
1319	}	1756	}
1320	}	1757	}
1321		1758
1322	inline_size void	1759	inline_speed void
1323	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1760	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1324	{	1761	{
1325	if (!*flag)	1762	if (expect_true (*flag))
		1763	return;
		1764
		1765	*flag = 1;
		1766
		1767	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1768
		1769	pipe_write_skipped = 1;
		1770
		1771	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1772
		1773	if (pipe_write_wanted)
1326	{	1774	{
		1775	int old_errno;
		1776
		1777	pipe_write_skipped = 0; /* just an optimisation, no fence needed */
		1778
1327	int old_errno = errno; /* save errno because write might clobber it */	1779	old_errno = errno; /* save errno because write will clobber it */
1328	char dummy;
1329
1330	*flag = 1;
1331		1780
1332	#if EV_USE_EVENTFD	1781	#if EV_USE_EVENTFD
1333	if (evfd >= 0)	1782	if (evfd >= 0)
1334	{	1783	{
1335	uint64_t counter = 1;	1784	uint64_t counter = 1;
1336	write (evfd, &counter, sizeof (uint64_t));	1785	write (evfd, &counter, sizeof (uint64_t));
1337	}	1786	}
1338	else	1787	else
1339	#endif	1788	#endif
		1789	{
1340	/* win32 people keep sending patches that change this write() to send() */	1790	/* 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 */	1791	/* 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 */	1792	/* 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 */	1793	/* where your send() is from - it's definitely not the microsoft send, and */
1344	/* tell me. thank you. */	1794	/* tell me. thank you. */
1345	write (evpipe [1], &dummy, 1);	1795	write (evpipe [1], &(evpipe [1]), 1);
		1796	}
1346		1797
1347	errno = old_errno;	1798	errno = old_errno;
1348	}	1799	}
1349	}	1800	}
1350		1801
…		…
1353	static void	1804	static void
1354	pipecb (EV_P_ ev_io *iow, int revents)	1805	pipecb (EV_P_ ev_io *iow, int revents)
1355	{	1806	{
1356	int i;	1807	int i;
1357		1808
		1809	if (revents & EV_READ)
		1810	{
1358	#if EV_USE_EVENTFD	1811	#if EV_USE_EVENTFD
1359	if (evfd >= 0)	1812	if (evfd >= 0)
1360	{	1813	{
1361	uint64_t counter;	1814	uint64_t counter;
1362	read (evfd, &counter, sizeof (uint64_t));	1815	read (evfd, &counter, sizeof (uint64_t));
1363	}	1816	}
1364	else	1817	else
1365	#endif	1818	#endif
1366	{	1819	{
1367	char dummy;	1820	char dummy;
1368	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1821	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1369	read (evpipe [0], &dummy, 1);	1822	read (evpipe [0], &dummy, 1);
		1823	}
1370	}	1824	}
		1825
		1826	pipe_write_skipped = 0;
1371		1827
1372	#if EV_SIGNAL_ENABLE	1828	#if EV_SIGNAL_ENABLE
1373	if (sig_pending)	1829	if (sig_pending)
1374	{	1830	{
1375	sig_pending = 0;	1831	sig_pending = 0;
1376		1832
1377	for (i = EV_NSIG - 1; i--; )	1833	for (i = EV_NSIG - 1; i--; )
1378	if (expect_false (signals [i].pending))	1834	if (expect_false (signals [i].pending))
1379	ev_feed_signal_event (EV_A_ i + 1);	1835	ev_feed_signal_event (EV_A_ i + 1);
…		…
1404	EV_P = signals [signum - 1].loop;	1860	EV_P = signals [signum - 1].loop;
1405		1861
1406	if (!EV_A)	1862	if (!EV_A)
1407	return;	1863	return;
1408	#endif	1864	#endif
		1865
		1866	if (!ev_active (&pipe_w))
		1867	return;
1409		1868
1410	signals [signum - 1].pending = 1;	1869	signals [signum - 1].pending = 1;
1411	evpipe_write (EV_A_ &sig_pending);	1870	evpipe_write (EV_A_ &sig_pending);
1412	}	1871	}
1413		1872
…		…
1545	#endif	2004	#endif
1546	#if EV_USE_SELECT	2005	#if EV_USE_SELECT
1547	# include "ev_select.c"	2006	# include "ev_select.c"
1548	#endif	2007	#endif
1549		2008
1550	int	2009	int ecb_cold
1551	ev_version_major (void)	2010	ev_version_major (void)
1552	{	2011	{
1553	return EV_VERSION_MAJOR;	2012	return EV_VERSION_MAJOR;
1554	}	2013	}
1555		2014
1556	int	2015	int ecb_cold
1557	ev_version_minor (void)	2016	ev_version_minor (void)
1558	{	2017	{
1559	return EV_VERSION_MINOR;	2018	return EV_VERSION_MINOR;
1560	}	2019	}
1561		2020
1562	/* return true if we are running with elevated privileges and should ignore env variables */	2021	/* return true if we are running with elevated privileges and should ignore env variables */
1563	int inline_size	2022	int inline_size ecb_cold
1564	enable_secure (void)	2023	enable_secure (void)
1565	{	2024	{
1566	#ifdef _WIN32	2025	#ifdef _WIN32
1567	return 0;	2026	return 0;
1568	#else	2027	#else
1569	return getuid () != geteuid ()	2028	return getuid () != geteuid ()
1570	\|\| getgid () != getegid ();	2029	\|\| getgid () != getegid ();
1571	#endif	2030	#endif
1572	}	2031	}
1573		2032
1574	unsigned int	2033	unsigned int ecb_cold
1575	ev_supported_backends (void)	2034	ev_supported_backends (void)
1576	{	2035	{
1577	unsigned int flags = 0;	2036	unsigned int flags = 0;
1578		2037
1579	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	2038	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1583	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	2042	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1584		2043
1585	return flags;	2044	return flags;
1586	}	2045	}
1587		2046
1588	unsigned int	2047	unsigned int ecb_cold
1589	ev_recommended_backends (void)	2048	ev_recommended_backends (void)
1590	{	2049	{
1591	unsigned int flags = ev_supported_backends ();	2050	unsigned int flags = ev_supported_backends ();
1592		2051
1593	#ifndef __NetBSD__	2052	#ifndef __NetBSD__
…		…
1605	#endif	2064	#endif
1606		2065
1607	return flags;	2066	return flags;
1608	}	2067	}
1609		2068
1610	unsigned int	2069	unsigned int ecb_cold
1611	ev_embeddable_backends (void)	2070	ev_embeddable_backends (void)
1612	{	2071	{
1613	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	2072	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1614		2073
1615	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	2074	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1660	ev_userdata (EV_P)	2119	ev_userdata (EV_P)
1661	{	2120	{
1662	return userdata;	2121	return userdata;
1663	}	2122	}
1664		2123
		2124	void
1665	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	2125	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1666	{	2126	{
1667	invoke_cb = invoke_pending_cb;	2127	invoke_cb = invoke_pending_cb;
1668	}	2128	}
1669		2129
		2130	void
1670	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	2131	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1671	{	2132	{
1672	release_cb = release;	2133	release_cb = release;
1673	acquire_cb = acquire;	2134	acquire_cb = acquire;
1674	}	2135	}
1675	#endif	2136	#endif
1676		2137
1677	/* initialise a loop structure, must be zero-initialised */	2138	/* initialise a loop structure, must be zero-initialised */
1678	static void noinline	2139	static void noinline ecb_cold
1679	loop_init (EV_P_ unsigned int flags)	2140	loop_init (EV_P_ unsigned int flags)
1680	{	2141	{
1681	if (!backend)	2142	if (!backend)
1682	{	2143	{
1683	origflags = flags;	2144	origflags = flags;
…		…
1711	if (!(flags & EVFLAG_NOENV)	2172	if (!(flags & EVFLAG_NOENV)
1712	&& !enable_secure ()	2173	&& !enable_secure ()
1713	&& getenv ("LIBEV_FLAGS"))	2174	&& getenv ("LIBEV_FLAGS"))
1714	flags = atoi (getenv ("LIBEV_FLAGS"));	2175	flags = atoi (getenv ("LIBEV_FLAGS"));
1715		2176
1716	ev_rt_now = ev_time ();	2177	ev_rt_now = ev_time ();
1717	mn_now = get_clock ();	2178	mn_now = get_clock ();
1718	now_floor = mn_now;	2179	now_floor = mn_now;
1719	rtmn_diff = ev_rt_now - mn_now;	2180	rtmn_diff = ev_rt_now - mn_now;
1720	#if EV_FEATURE_API	2181	#if EV_FEATURE_API
1721	invoke_cb = ev_invoke_pending;	2182	invoke_cb = ev_invoke_pending;
1722	#endif	2183	#endif
1723		2184
1724	io_blocktime = 0.;	2185	io_blocktime = 0.;
1725	timeout_blocktime = 0.;	2186	timeout_blocktime = 0.;
1726	backend = 0;	2187	backend = 0;
1727	backend_fd = -1;	2188	backend_fd = -1;
1728	sig_pending = 0;	2189	sig_pending = 0;
1729	#if EV_ASYNC_ENABLE	2190	#if EV_ASYNC_ENABLE
1730	async_pending = 0;	2191	async_pending = 0;
1731	#endif	2192	#endif
		2193	pipe_write_skipped = 0;
		2194	pipe_write_wanted = 0;
1732	#if EV_USE_INOTIFY	2195	#if EV_USE_INOTIFY
1733	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	2196	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1734	#endif	2197	#endif
1735	#if EV_USE_SIGNALFD	2198	#if EV_USE_SIGNALFD
1736	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	2199	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1737	#endif	2200	#endif
1738		2201
1739	if (!(flags & EVBACKEND_MASK))	2202	if (!(flags & EVBACKEND_MASK))
1740	flags \|= ev_recommended_backends ();	2203	flags \|= ev_recommended_backends ();
1741		2204
…		…
1766	#endif	2229	#endif
1767	}	2230	}
1768	}	2231	}
1769		2232
1770	/* free up a loop structure */	2233	/* free up a loop structure */
1771	void	2234	void ecb_cold
1772	ev_loop_destroy (EV_P)	2235	ev_loop_destroy (EV_P)
1773	{	2236	{
1774	int i;	2237	int i;
1775		2238
1776	#if EV_MULTIPLICITY	2239	#if EV_MULTIPLICITY
…		…
1906	infy_fork (EV_A);	2369	infy_fork (EV_A);
1907	#endif	2370	#endif
1908		2371
1909	if (ev_is_active (&pipe_w))	2372	if (ev_is_active (&pipe_w))
1910	{	2373	{
1911	/* this "locks" the handlers against writing to the pipe */	2374	/* 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		2375
1918	ev_ref (EV_A);	2376	ev_ref (EV_A);
1919	ev_io_stop (EV_A_ &pipe_w);	2377	ev_io_stop (EV_A_ &pipe_w);
1920		2378
1921	#if EV_USE_EVENTFD	2379	#if EV_USE_EVENTFD
…		…
1939	postfork = 0;	2397	postfork = 0;
1940	}	2398	}
1941		2399
1942	#if EV_MULTIPLICITY	2400	#if EV_MULTIPLICITY
1943		2401
1944	struct ev_loop *	2402	struct ev_loop * ecb_cold
1945	ev_loop_new (unsigned int flags)	2403	ev_loop_new (unsigned int flags)
1946	{	2404	{
1947	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2405	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1948		2406
1949	memset (EV_A, 0, sizeof (struct ev_loop));	2407	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1957	}	2415	}
1958		2416
1959	#endif /* multiplicity */	2417	#endif /* multiplicity */
1960		2418
1961	#if EV_VERIFY	2419	#if EV_VERIFY
1962	static void noinline	2420	static void noinline ecb_cold
1963	verify_watcher (EV_P_ W w)	2421	verify_watcher (EV_P_ W w)
1964	{	2422	{
1965	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2423	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1966		2424
1967	if (w->pending)	2425	if (w->pending)
1968	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2426	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1969	}	2427	}
1970		2428
1971	static void noinline	2429	static void noinline ecb_cold
1972	verify_heap (EV_P_ ANHE *heap, int N)	2430	verify_heap (EV_P_ ANHE *heap, int N)
1973	{	2431	{
1974	int i;	2432	int i;
1975		2433
1976	for (i = HEAP0; i < N + HEAP0; ++i)	2434	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1981		2439
1982	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2440	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1983	}	2441	}
1984	}	2442	}
1985		2443
1986	static void noinline	2444	static void noinline ecb_cold
1987	array_verify (EV_P_ W *ws, int cnt)	2445	array_verify (EV_P_ W *ws, int cnt)
1988	{	2446	{
1989	while (cnt--)	2447	while (cnt--)
1990	{	2448	{
1991	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2449	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1993	}	2451	}
1994	}	2452	}
1995	#endif	2453	#endif
1996		2454
1997	#if EV_FEATURE_API	2455	#if EV_FEATURE_API
1998	void	2456	void ecb_cold
1999	ev_verify (EV_P)	2457	ev_verify (EV_P)
2000	{	2458	{
2001	#if EV_VERIFY	2459	#if EV_VERIFY
2002	int i;	2460	int i;
2003	WL w;	2461	WL w;
…		…
2069	#endif	2527	#endif
2070	}	2528	}
2071	#endif	2529	#endif
2072		2530
2073	#if EV_MULTIPLICITY	2531	#if EV_MULTIPLICITY
2074	struct ev_loop *	2532	struct ev_loop * ecb_cold
2075	#else	2533	#else
2076	int	2534	int
2077	#endif	2535	#endif
2078	ev_default_loop (unsigned int flags)	2536	ev_default_loop (unsigned int flags)
2079	{	2537	{
…		…
2208	}	2666	}
2209	}	2667	}
2210		2668
2211	#if EV_PERIODIC_ENABLE	2669	#if EV_PERIODIC_ENABLE
2212		2670
2213	inline_speed void	2671	static void noinline
2214	periodic_recalc (EV_P_ ev_periodic *w)	2672	periodic_recalc (EV_P_ ev_periodic *w)
2215	{	2673	{
2216	/* TODO: use slow but potentially more correct incremental algo, */	2674	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2217	/* also do not rely on ceil */	2675	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;	2676
		2677	/* the above almost always errs on the low side */
		2678	while (at <= ev_rt_now)
		2679	{
		2680	ev_tstamp nat = at + w->interval;
		2681
		2682	/* when resolution fails us, we use ev_rt_now */
		2683	if (expect_false (nat == at))
		2684	{
		2685	at = ev_rt_now;
		2686	break;
		2687	}
		2688
		2689	at = nat;
		2690	}
		2691
		2692	ev_at (w) = at;
2219	}	2693	}
2220		2694
2221	/* make periodics pending */	2695	/* make periodics pending */
2222	inline_size void	2696	inline_size void
2223	periodics_reify (EV_P)	2697	periodics_reify (EV_P)
…		…
2245	downheap (periodics, periodiccnt, HEAP0);	2719	downheap (periodics, periodiccnt, HEAP0);
2246	}	2720	}
2247	else if (w->interval)	2721	else if (w->interval)
2248	{	2722	{
2249	periodic_recalc (EV_A_ w);	2723	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]);	2724	ANHE_at_cache (periodics [HEAP0]);
2265	downheap (periodics, periodiccnt, HEAP0);	2725	downheap (periodics, periodiccnt, HEAP0);
2266	}	2726	}
2267	else	2727	else
2268	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2728	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2276	}	2736	}
2277	}	2737	}
2278		2738
2279	/* simply recalculate all periodics */	2739	/* simply recalculate all periodics */
2280	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2740	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2281	static void noinline	2741	static void noinline ecb_cold
2282	periodics_reschedule (EV_P)	2742	periodics_reschedule (EV_P)
2283	{	2743	{
2284	int i;	2744	int i;
2285		2745
2286	/* adjust periodics after time jump */	2746	/* adjust periodics after time jump */
…		…
2299	reheap (periodics, periodiccnt);	2759	reheap (periodics, periodiccnt);
2300	}	2760	}
2301	#endif	2761	#endif
2302		2762
2303	/* adjust all timers by a given offset */	2763	/* adjust all timers by a given offset */
2304	static void noinline	2764	static void noinline ecb_cold
2305	timers_reschedule (EV_P_ ev_tstamp adjust)	2765	timers_reschedule (EV_P_ ev_tstamp adjust)
2306	{	2766	{
2307	int i;	2767	int i;
2308		2768
2309	for (i = 0; i < timercnt; ++i)	2769	for (i = 0; i < timercnt; ++i)
…		…
2346	* doesn't hurt either as we only do this on time-jumps or	2806	* doesn't hurt either as we only do this on time-jumps or
2347	* in the unlikely event of having been preempted here.	2807	* in the unlikely event of having been preempted here.
2348	*/	2808	*/
2349	for (i = 4; --i; )	2809	for (i = 4; --i; )
2350	{	2810	{
		2811	ev_tstamp diff;
2351	rtmn_diff = ev_rt_now - mn_now;	2812	rtmn_diff = ev_rt_now - mn_now;
2352		2813
		2814	diff = odiff - rtmn_diff;
		2815
2353	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2816	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2354	return; /* all is well */	2817	return; /* all is well */
2355		2818
2356	ev_rt_now = ev_time ();	2819	ev_rt_now = ev_time ();
2357	mn_now = get_clock ();	2820	mn_now = get_clock ();
2358	now_floor = mn_now;	2821	now_floor = mn_now;
…		…
2448	ev_tstamp prev_mn_now = mn_now;	2911	ev_tstamp prev_mn_now = mn_now;
2449		2912
2450	/* update time to cancel out callback processing overhead */	2913	/* update time to cancel out callback processing overhead */
2451	time_update (EV_A_ 1e100);	2914	time_update (EV_A_ 1e100);
2452		2915
		2916	/* from now on, we want a pipe-wake-up */
		2917	pipe_write_wanted = 1;
		2918
		2919	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		2920
2453	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2921	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2454	{	2922	{
2455	waittime = MAX_BLOCKTIME;	2923	waittime = MAX_BLOCKTIME;
2456		2924
2457	if (timercnt)	2925	if (timercnt)
2458	{	2926	{
2459	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2927	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2460	if (waittime > to) waittime = to;	2928	if (waittime > to) waittime = to;
2461	}	2929	}
2462		2930
2463	#if EV_PERIODIC_ENABLE	2931	#if EV_PERIODIC_ENABLE
2464	if (periodiccnt)	2932	if (periodiccnt)
2465	{	2933	{
2466	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2934	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2467	if (waittime > to) waittime = to;	2935	if (waittime > to) waittime = to;
2468	}	2936	}
2469	#endif	2937	#endif
2470		2938
2471	/* don't let timeouts decrease the waittime below timeout_blocktime */	2939	/* don't let timeouts decrease the waittime below timeout_blocktime */
2472	if (expect_false (waittime < timeout_blocktime))	2940	if (expect_false (waittime < timeout_blocktime))
2473	waittime = timeout_blocktime;	2941	waittime = timeout_blocktime;
		2942
		2943	/* at this point, we NEED to wait, so we have to ensure */
		2944	/* to pass a minimum nonzero value to the backend */
		2945	if (expect_false (waittime < backend_mintime))
		2946	waittime = backend_mintime;
2474		2947
2475	/* extra check because io_blocktime is commonly 0 */	2948	/* extra check because io_blocktime is commonly 0 */
2476	if (expect_false (io_blocktime))	2949	if (expect_false (io_blocktime))
2477	{	2950	{
2478	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2951	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2479		2952
2480	if (sleeptime > waittime - backend_fudge)	2953	if (sleeptime > waittime - backend_mintime)
2481	sleeptime = waittime - backend_fudge;	2954	sleeptime = waittime - backend_mintime;
2482		2955
2483	if (expect_true (sleeptime > 0.))	2956	if (expect_true (sleeptime > 0.))
2484	{	2957	{
2485	ev_sleep (sleeptime);	2958	ev_sleep (sleeptime);
2486	waittime -= sleeptime;	2959	waittime -= sleeptime;
…		…
2492	++loop_count;	2965	++loop_count;
2493	#endif	2966	#endif
2494	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2967	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2495	backend_poll (EV_A_ waittime);	2968	backend_poll (EV_A_ waittime);
2496	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2969	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2970
		2971	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2972
		2973	if (pipe_write_skipped)
		2974	{
		2975	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2976	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2977	}
		2978
2497		2979
2498	/* update ev_rt_now, do magic */	2980	/* update ev_rt_now, do magic */
2499	time_update (EV_A_ waittime + sleeptime);	2981	time_update (EV_A_ waittime + sleeptime);
2500	}	2982	}
2501		2983
…		…
3078	if (!pend \|\| pend == path)	3560	if (!pend \|\| pend == path)
3079	break;	3561	break;
3080		3562
3081	*pend = 0;	3563	*pend = 0;
3082	w->wd = inotify_add_watch (fs_fd, path, mask);	3564	w->wd = inotify_add_watch (fs_fd, path, mask);
3083	}	3565	}
3084	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3566	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3085	}	3567	}
3086	}	3568	}
3087		3569
3088	if (w->wd >= 0)	3570	if (w->wd >= 0)
…		…
3155	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3637	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3156	ofs += sizeof (struct inotify_event) + ev->len;	3638	ofs += sizeof (struct inotify_event) + ev->len;
3157	}	3639	}
3158	}	3640	}
3159		3641
3160	inline_size void	3642	inline_size void ecb_cold
3161	ev_check_2625 (EV_P)	3643	ev_check_2625 (EV_P)
3162	{	3644	{
3163	/* kernels < 2.6.25 are borked	3645	/* kernels < 2.6.25 are borked
3164	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3646	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3165	*/	3647	*/
…		…
3790	}	4272	}
3791		4273
3792	/*****************************************************************************/	4274	/*****************************************************************************/
3793		4275
3794	#if EV_WALK_ENABLE	4276	#if EV_WALK_ENABLE
3795	void	4277	void ecb_cold
3796	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	4278	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3797	{	4279	{
3798	int i, j;	4280	int i, j;
3799	ev_watcher_list wl, wn;	4281	ev_watcher_list wl, wn;
3800		4282
…		…
3844	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));	4326	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3845	#endif	4327	#endif
3846		4328
3847	#if EV_IDLE_ENABLE	4329	#if EV_IDLE_ENABLE
3848	if (types & EV_IDLE)	4330	if (types & EV_IDLE)
3849	for (j = NUMPRI; i--; )	4331	for (j = NUMPRI; j--; )
3850	for (i = idlecnt [j]; i--; )	4332	for (i = idlecnt [j]; i--; )
3851	cb (EV_A_ EV_IDLE, idles [j][i]);	4333	cb (EV_A_ EV_IDLE, idles [j][i]);
3852	#endif	4334	#endif
3853		4335
3854	#if EV_FORK_ENABLE	4336	#if EV_FORK_ENABLE

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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 1.394 by root, Thu Aug 4 14:49:27 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs.
Revision 1.394 by root, Thu Aug 4 14:49:27 2011 UTC