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

Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.392 by root, Thu Aug 4 14:37:49 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	#define ECB_MEMORY_FENCE_ACQUIRE do { } while (0)
		544	#define ECB_MEMORY_FENCE_RELEASE do { } while (0)
		545	#endif
		546
		547	#ifndef ECB_MEMORY_FENCE
		548	#if ECB_GCC_VERSION(2,5)
		549	#if __x86
		550	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		551	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		552	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		553	#elif __amd64
		554	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		555	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		556	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		557	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		558	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		559	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \
		560	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__) \
		561	\|\| defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \
		562	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )
		563	#define ECB_MEMORY_FENCE \
		564	do { \
		565	int null = 0; \
		566	__asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \
		567	while (0)
		568	#endif
		569	#endif
		570	#endif
		571
		572	#ifndef ECB_MEMORY_FENCE
		573	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER)
		574	#define ECB_MEMORY_FENCE __sync_synchronize ()
		575	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		576	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		577	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		578	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		579	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		580	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		581	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		582	#elif defined(_WIN32)
		583	#include <WinNT.h>
		584	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		585	#endif
		586	#endif
		587
		588	#ifndef ECB_MEMORY_FENCE
		589	#if !ECB_AVOID_PTHREADS
		590	/*
		591	* if you get undefined symbol references to pthread_mutex_lock,
		592	* or failure to find pthread.h, then you should implement
		593	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		594	* OR provide pthread.h and link against the posix thread library
		595	* of your system.
		596	*/
		597	#include <pthread.h>
		598	#define ECB_NEEDS_PTHREADS 1
		599	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		600
		601	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		602	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		603	#endif
		604	#endif
		605
		606	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
		607	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		608	#endif
		609
		610	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
		611	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		612	#endif
		613
		614	/*****************************************************************************/
		615
		616	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		617
		618	#if __cplusplus
		619	#define ecb_inline static inline
		620	#elif ECB_GCC_VERSION(2,5)
		621	#define ecb_inline static __inline__
		622	#elif ECB_C99
		623	#define ecb_inline static inline
		624	#else
		625	#define ecb_inline static
		626	#endif
		627
		628	#if ECB_GCC_VERSION(3,3)
		629	#define ecb_restrict __restrict__
		630	#elif ECB_C99
		631	#define ecb_restrict restrict
		632	#else
		633	#define ecb_restrict
		634	#endif
		635
		636	typedef int ecb_bool;
		637
		638	#define ECB_CONCAT_(a, b) a ## b
		639	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
		640	#define ECB_STRINGIFY_(a) # a
		641	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		642
		643	#define ecb_function_ ecb_inline
		644
		645	#if ECB_GCC_VERSION(3,1)
		646	#define ecb_attribute(attrlist) __attribute__(attrlist)
		647	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		648	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		649	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		650	#else
		651	#define ecb_attribute(attrlist)
		652	#define ecb_is_constant(expr) 0
		653	#define ecb_expect(expr,value) (expr)
		654	#define ecb_prefetch(addr,rw,locality)
		655	#endif
		656
		657	/* no emulation for ecb_decltype */
		658	#if ECB_GCC_VERSION(4,5)
		659	#define ecb_decltype(x) __decltype(x)
		660	#elif ECB_GCC_VERSION(3,0)
		661	#define ecb_decltype(x) __typeof(x)
		662	#endif
		663
		664	#define ecb_noinline ecb_attribute ((__noinline__))
		665	#define ecb_noreturn ecb_attribute ((__noreturn__))
		666	#define ecb_unused ecb_attribute ((__unused__))
		667	#define ecb_const ecb_attribute ((__const__))
		668	#define ecb_pure ecb_attribute ((__pure__))
		669
		670	#if ECB_GCC_VERSION(4,3)
		671	#define ecb_artificial ecb_attribute ((__artificial__))
		672	#define ecb_hot ecb_attribute ((__hot__))
		673	#define ecb_cold ecb_attribute ((__cold__))
		674	#else
		675	#define ecb_artificial
		676	#define ecb_hot
		677	#define ecb_cold
		678	#endif
		679
		680	/* put around conditional expressions if you are very sure that the */
		681	/* expression is mostly true or mostly false. note that these return */
		682	/* booleans, not the expression. */
474	#define expect_false(expr) expect ((expr) != 0, 0)	683	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475	#define expect_true(expr) expect ((expr) != 0, 1)	684	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		685	/* for compatibility to the rest of the world */
		686	#define ecb_likely(expr) ecb_expect_true (expr)
		687	#define ecb_unlikely(expr) ecb_expect_false (expr)
		688
		689	/* count trailing zero bits and count # of one bits */
		690	#if ECB_GCC_VERSION(3,4)
		691	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		692	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		693	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		694	#define ecb_ctz32(x) __builtin_ctz (x)
		695	#define ecb_ctz64(x) __builtin_ctzll (x)
		696	#define ecb_popcount32(x) __builtin_popcount (x)
		697	/* no popcountll */
		698	#else
		699	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		700	ecb_function_ int
		701	ecb_ctz32 (uint32_t x)
		702	{
		703	int r = 0;
		704
		705	x &= ~x + 1; /* this isolates the lowest bit */
		706
		707	#if ECB_branchless_on_i386
		708	r += !!(x & 0xaaaaaaaa) << 0;
		709	r += !!(x & 0xcccccccc) << 1;
		710	r += !!(x & 0xf0f0f0f0) << 2;
		711	r += !!(x & 0xff00ff00) << 3;
		712	r += !!(x & 0xffff0000) << 4;
		713	#else
		714	if (x & 0xaaaaaaaa) r += 1;
		715	if (x & 0xcccccccc) r += 2;
		716	if (x & 0xf0f0f0f0) r += 4;
		717	if (x & 0xff00ff00) r += 8;
		718	if (x & 0xffff0000) r += 16;
		719	#endif
		720
		721	return r;
		722	}
		723
		724	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		725	ecb_function_ int
		726	ecb_ctz64 (uint64_t x)
		727	{
		728	int shift = x & 0xffffffffU ? 0 : 32;
		729	return ecb_ctz32 (x >> shift) + shift;
		730	}
		731
		732	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		733	ecb_function_ int
		734	ecb_popcount32 (uint32_t x)
		735	{
		736	x -= (x >> 1) & 0x55555555;
		737	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		738	x = ((x >> 4) + x) & 0x0f0f0f0f;
		739	x *= 0x01010101;
		740
		741	return x >> 24;
		742	}
		743
		744	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		745	ecb_function_ int ecb_ld32 (uint32_t x)
		746	{
		747	int r = 0;
		748
		749	if (x >> 16) { x >>= 16; r += 16; }
		750	if (x >> 8) { x >>= 8; r += 8; }
		751	if (x >> 4) { x >>= 4; r += 4; }
		752	if (x >> 2) { x >>= 2; r += 2; }
		753	if (x >> 1) { r += 1; }
		754
		755	return r;
		756	}
		757
		758	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		759	ecb_function_ int ecb_ld64 (uint64_t x)
		760	{
		761	int r = 0;
		762
		763	if (x >> 32) { x >>= 32; r += 32; }
		764
		765	return r + ecb_ld32 (x);
		766	}
		767	#endif
		768
		769	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		770	/* so for this version we are lazy */
		771	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		772	ecb_function_ int
		773	ecb_popcount64 (uint64_t x)
		774	{
		775	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		776	}
		777
		778	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		779	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		780	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		781	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		782	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		783	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		784	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		785	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		786
		787	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		788	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		789	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		790	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		791	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		792	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		793	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		794	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		795
		796	#if ECB_GCC_VERSION(4,3)
		797	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		798	#define ecb_bswap32(x) __builtin_bswap32 (x)
		799	#define ecb_bswap64(x) __builtin_bswap64 (x)
		800	#else
		801	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		802	ecb_function_ uint16_t
		803	ecb_bswap16 (uint16_t x)
		804	{
		805	return ecb_rotl16 (x, 8);
		806	}
		807
		808	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		809	ecb_function_ uint32_t
		810	ecb_bswap32 (uint32_t x)
		811	{
		812	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		813	}
		814
		815	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		816	ecb_function_ uint64_t
		817	ecb_bswap64 (uint64_t x)
		818	{
		819	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		820	}
		821	#endif
		822
		823	#if ECB_GCC_VERSION(4,5)
		824	#define ecb_unreachable() __builtin_unreachable ()
		825	#else
		826	/* this seems to work fine, but gcc always emits a warning for it :/ */
		827	ecb_function_ void ecb_unreachable (void) ecb_noreturn;
		828	ecb_function_ void ecb_unreachable (void) { }
		829	#endif
		830
		831	/* try to tell the compiler that some condition is definitely true */
		832	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
		833
		834	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
		835	ecb_function_ unsigned char
		836	ecb_byteorder_helper (void)
		837	{
		838	const uint32_t u = 0x11223344;
		839	return (unsigned char )&u;
		840	}
		841
		842	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
		843	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
		844	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
		845	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
		846
		847	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		848	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		849	#else
		850	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		851	#endif
		852
		853	#if ecb_cplusplus_does_not_suck
		854	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
		855	template<typename T, int N>
		856	static inline int ecb_array_length (const T (&arr)[N])
		857	{
		858	return N;
		859	}
		860	#else
		861	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		862	#endif
		863
		864	#endif
		865
		866	/* ECB.H END */
		867
		868	#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
		869	# undef ECB_MEMORY_FENCE
		870	# undef ECB_MEMORY_FENCE_ACQUIRE
		871	# undef ECB_MEMORY_FENCE_RELEASE
		872	#endif
		873
		874	#define expect_false(cond) ecb_expect_false (cond)
		875	#define expect_true(cond) ecb_expect_true (cond)
		876	#define noinline ecb_noinline
		877
476	#define inline_size static inline	878	#define inline_size ecb_inline
477		879
478	#if EV_FEATURE_CODE	880	#if EV_FEATURE_CODE
479	# define inline_speed static inline	881	# define inline_speed ecb_inline
480	#else	882	#else
481	# define inline_speed static noinline	883	# define inline_speed static noinline
482	#endif	884	#endif
483		885
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	886	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	925	# include "ev_win32.c"
524	#endif	926	#endif
525		927
526	/*****************************************************************************/	928	/*****************************************************************************/
527		929
		930	/* define a suitable floor function (only used by periodics atm) */
		931
		932	#if EV_USE_FLOOR
		933	# include <math.h>
		934	# define ev_floor(v) floor (v)
		935	#else
		936
		937	#include <float.h>
		938
		939	/* a floor() replacement function, should be independent of ev_tstamp type */
		940	static ev_tstamp noinline
		941	ev_floor (ev_tstamp v)
		942	{
		943	/* the choice of shift factor is not terribly important */
		944	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		945	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		946	#else
		947	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		948	#endif
		949
		950	/* argument too large for an unsigned long? */
		951	if (expect_false (v >= shift))
		952	{
		953	ev_tstamp f;
		954
		955	if (v == v - 1.)
		956	return v; /* very large number */
		957
		958	f = shift * ev_floor (v * (1. / shift));
		959	return f + ev_floor (v - f);
		960	}
		961
		962	/* special treatment for negative args? */
		963	if (expect_false (v < 0.))
		964	{
		965	ev_tstamp f = -ev_floor (-v);
		966
		967	return f - (f == v ? 0 : 1);
		968	}
		969
		970	/* fits into an unsigned long */
		971	return (unsigned long)v;
		972	}
		973
		974	#endif
		975
		976	/*****************************************************************************/
		977
528	#ifdef __linux	978	#ifdef __linux
529	# include <sys/utsname.h>	979	# include <sys/utsname.h>
530	#endif	980	#endif
531		981
532	static unsigned int noinline	982	static unsigned int noinline ecb_cold
533	ev_linux_version (void)	983	ev_linux_version (void)
534	{	984	{
535	#ifdef __linux	985	#ifdef __linux
536	unsigned int v = 0;	986	unsigned int v = 0;
537	struct utsname buf;	987	struct utsname buf;
…		…
566	}	1016	}
567		1017
568	/*****************************************************************************/	1018	/*****************************************************************************/
569		1019
570	#if EV_AVOID_STDIO	1020	#if EV_AVOID_STDIO
571	static void noinline	1021	static void noinline ecb_cold
572	ev_printerr (const char *msg)	1022	ev_printerr (const char *msg)
573	{	1023	{
574	write (STDERR_FILENO, msg, strlen (msg));	1024	write (STDERR_FILENO, msg, strlen (msg));
575	}	1025	}
576	#endif	1026	#endif
577		1027
578	static void (syserr_cb)(const char msg);	1028	static void (syserr_cb)(const char msg);
579		1029
580	void	1030	void ecb_cold
581	ev_set_syserr_cb (void (cb)(const char msg))	1031	ev_set_syserr_cb (void (cb)(const char msg))
582	{	1032	{
583	syserr_cb = cb;	1033	syserr_cb = cb;
584	}	1034	}
585		1035
586	static void noinline	1036	static void noinline ecb_cold
587	ev_syserr (const char *msg)	1037	ev_syserr (const char *msg)
588	{	1038	{
589	if (!msg)	1039	if (!msg)
590	msg = "(libev) system error";	1040	msg = "(libev) system error";
591		1041
…		…
624	#endif	1074	#endif
625	}	1075	}
626		1076
627	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	1077	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
628		1078
629	void	1079	void ecb_cold
630	ev_set_allocator (void (cb)(void *ptr, long size))	1080	ev_set_allocator (void (cb)(void *ptr, long size))
631	{	1081	{
632	alloc = cb;	1082	alloc = cb;
633	}	1083	}
634		1084
…		…
816	select (0, 0, 0, 0, &tv);	1266	select (0, 0, 0, 0, &tv);
817	#endif	1267	#endif
818	}	1268	}
819	}	1269	}
820		1270
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	/*****************************************************************************/	1271	/*****************************************************************************/
830		1272
831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	1273	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
832		1274
833	/* find a suitable new size for the given array, */	1275	/* find a suitable new size for the given array, */
…		…
851	}	1293	}
852		1294
853	return ncur;	1295	return ncur;
854	}	1296	}
855		1297
856	static noinline void *	1298	static void * noinline ecb_cold
857	array_realloc (int elem, void base, int cur, int cnt)	1299	array_realloc (int elem, void base, int cur, int cnt)
858	{	1300	{
859	cur = array_nextsize (elem, cur, cnt);	1301	cur = array_nextsize (elem, cur, cnt);
860	return ev_realloc (base, elem * *cur);	1302	return ev_realloc (base, elem * *cur);
861	}	1303	}
…		…
864	memset ((void )(base), 0, sizeof ((base)) * (count))	1306	memset ((void )(base), 0, sizeof ((base)) * (count))
865		1307
866	#define array_needsize(type,base,cur,cnt,init) \	1308	#define array_needsize(type,base,cur,cnt,init) \
867	if (expect_false ((cnt) > (cur))) \	1309	if (expect_false ((cnt) > (cur))) \
868	{ \	1310	{ \
869	int ocur_ = (cur); \	1311	int ecb_unused ocur_ = (cur); \
870	(base) = (type *)array_realloc \	1312	(base) = (type *)array_realloc \
871	(sizeof (type), (base), &(cur), (cnt)); \	1313	(sizeof (type), (base), &(cur), (cnt)); \
872	init ((base) + (ocur_), (cur) - ocur_); \	1314	init ((base) + (ocur_), (cur) - ocur_); \
873	}	1315	}
874		1316
…		…
974	inline_size void	1416	inline_size void
975	fd_reify (EV_P)	1417	fd_reify (EV_P)
976	{	1418	{
977	int i;	1419	int i;
978		1420
		1421	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1422	for (i = 0; i < fdchangecnt; ++i)
		1423	{
		1424	int fd = fdchanges [i];
		1425	ANFD *anfd = anfds + fd;
		1426
		1427	if (anfd->reify & EV__IOFDSET && anfd->head)
		1428	{
		1429	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1430
		1431	if (handle != anfd->handle)
		1432	{
		1433	unsigned long arg;
		1434
		1435	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1436
		1437	/* handle changed, but fd didn't - we need to do it in two steps */
		1438	backend_modify (EV_A_ fd, anfd->events, 0);
		1439	anfd->events = 0;
		1440	anfd->handle = handle;
		1441	}
		1442	}
		1443	}
		1444	#endif
		1445
979	for (i = 0; i < fdchangecnt; ++i)	1446	for (i = 0; i < fdchangecnt; ++i)
980	{	1447	{
981	int fd = fdchanges [i];	1448	int fd = fdchanges [i];
982	ANFD *anfd = anfds + fd;	1449	ANFD *anfd = anfds + fd;
983	ev_io *w;	1450	ev_io *w;
…		…
985	unsigned char o_events = anfd->events;	1452	unsigned char o_events = anfd->events;
986	unsigned char o_reify = anfd->reify;	1453	unsigned char o_reify = anfd->reify;
987		1454
988	anfd->reify = 0;	1455	anfd->reify = 0;
989		1456
990	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
991	if (o_reify & EV__IOFDSET)
992	{
993	unsigned long arg;
994	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
995	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996	printf ("oi %d %x\n", fd, anfd->handle);//D
997	}
998	#endif
999
1000	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1457	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
1001	{	1458	{
1002	anfd->events = 0;	1459	anfd->events = 0;
1003		1460
1004	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1461	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1029	fdchanges [fdchangecnt - 1] = fd;	1486	fdchanges [fdchangecnt - 1] = fd;
1030	}	1487	}
1031	}	1488	}
1032		1489
1033	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1490	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034	inline_speed void	1491	inline_speed void ecb_cold
1035	fd_kill (EV_P_ int fd)	1492	fd_kill (EV_P_ int fd)
1036	{	1493	{
1037	ev_io *w;	1494	ev_io *w;
1038		1495
1039	while ((w = (ev_io *)anfds [fd].head))	1496	while ((w = (ev_io *)anfds [fd].head))
…		…
1042	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1499	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1043	}	1500	}
1044	}	1501	}
1045		1502
1046	/* check whether the given fd is actually valid, for error recovery */	1503	/* check whether the given fd is actually valid, for error recovery */
1047	inline_size int	1504	inline_size int ecb_cold
1048	fd_valid (int fd)	1505	fd_valid (int fd)
1049	{	1506	{
1050	#ifdef _WIN32	1507	#ifdef _WIN32
1051	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1508	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052	#else	1509	#else
1053	return fcntl (fd, F_GETFD) != -1;	1510	return fcntl (fd, F_GETFD) != -1;
1054	#endif	1511	#endif
1055	}	1512	}
1056		1513
1057	/* called on EBADF to verify fds */	1514	/* called on EBADF to verify fds */
1058	static void noinline	1515	static void noinline ecb_cold
1059	fd_ebadf (EV_P)	1516	fd_ebadf (EV_P)
1060	{	1517	{
1061	int fd;	1518	int fd;
1062		1519
1063	for (fd = 0; fd < anfdmax; ++fd)	1520	for (fd = 0; fd < anfdmax; ++fd)
…		…
1065	if (!fd_valid (fd) && errno == EBADF)	1522	if (!fd_valid (fd) && errno == EBADF)
1066	fd_kill (EV_A_ fd);	1523	fd_kill (EV_A_ fd);
1067	}	1524	}
1068		1525
1069	/* called on ENOMEM in select/poll to kill some fds and retry */	1526	/* called on ENOMEM in select/poll to kill some fds and retry */
1070	static void noinline	1527	static void noinline ecb_cold
1071	fd_enomem (EV_P)	1528	fd_enomem (EV_P)
1072	{	1529	{
1073	int fd;	1530	int fd;
1074		1531
1075	for (fd = anfdmax; fd--; )	1532	for (fd = anfdmax; fd--; )
…		…
1270		1727
1271	/*****************************************************************************/	1728	/*****************************************************************************/
1272		1729
1273	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1730	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1274		1731
1275	static void noinline	1732	static void noinline ecb_cold
1276	evpipe_init (EV_P)	1733	evpipe_init (EV_P)
1277	{	1734	{
1278	if (!ev_is_active (&pipe_w))	1735	if (!ev_is_active (&pipe_w))
1279	{	1736	{
1280	# if EV_USE_EVENTFD	1737	# if EV_USE_EVENTFD
…		…
1302	ev_io_start (EV_A_ &pipe_w);	1759	ev_io_start (EV_A_ &pipe_w);
1303	ev_unref (EV_A); /* watcher should not keep loop alive */	1760	ev_unref (EV_A); /* watcher should not keep loop alive */
1304	}	1761	}
1305	}	1762	}
1306		1763
1307	inline_size void	1764	inline_speed void
1308	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1765	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309	{	1766	{
1310	if (!*flag)	1767	if (expect_true (*flag))
		1768	return;
		1769
		1770	*flag = 1;
		1771
		1772	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1773
		1774	pipe_write_skipped = 1;
		1775
		1776	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1777
		1778	if (pipe_write_wanted)
1311	{	1779	{
		1780	int old_errno;
		1781
		1782	pipe_write_skipped = 0; /* just an optimisation, no fence needed */
		1783
1312	int old_errno = errno; /* save errno because write might clobber it */	1784	old_errno = errno; /* save errno because write will clobber it */
1313	char dummy;
1314
1315	*flag = 1;
1316		1785
1317	#if EV_USE_EVENTFD	1786	#if EV_USE_EVENTFD
1318	if (evfd >= 0)	1787	if (evfd >= 0)
1319	{	1788	{
1320	uint64_t counter = 1;	1789	uint64_t counter = 1;
1321	write (evfd, &counter, sizeof (uint64_t));	1790	write (evfd, &counter, sizeof (uint64_t));
1322	}	1791	}
1323	else	1792	else
1324	#endif	1793	#endif
		1794	{
1325	/* win32 people keep sending patches that change this write() to send() */	1795	/* win32 people keep sending patches that change this write() to send() */
1326	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1796	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1327	/* so when you think this write should be a send instead, please find out */	1797	/* so when you think this write should be a send instead, please find out */
1328	/* where your send() is from - it's definitely not the microsoft send, and */	1798	/* where your send() is from - it's definitely not the microsoft send, and */
1329	/* tell me. thank you. */	1799	/* tell me. thank you. */
1330	write (evpipe [1], &dummy, 1);	1800	write (evpipe [1], &(evpipe [1]), 1);
		1801	}
1331		1802
1332	errno = old_errno;	1803	errno = old_errno;
1333	}	1804	}
1334	}	1805	}
1335		1806
…		…
1338	static void	1809	static void
1339	pipecb (EV_P_ ev_io *iow, int revents)	1810	pipecb (EV_P_ ev_io *iow, int revents)
1340	{	1811	{
1341	int i;	1812	int i;
1342		1813
		1814	if (revents & EV_READ)
		1815	{
1343	#if EV_USE_EVENTFD	1816	#if EV_USE_EVENTFD
1344	if (evfd >= 0)	1817	if (evfd >= 0)
1345	{	1818	{
1346	uint64_t counter;	1819	uint64_t counter;
1347	read (evfd, &counter, sizeof (uint64_t));	1820	read (evfd, &counter, sizeof (uint64_t));
1348	}	1821	}
1349	else	1822	else
1350	#endif	1823	#endif
1351	{	1824	{
1352	char dummy;	1825	char dummy;
1353	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1826	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1354	read (evpipe [0], &dummy, 1);	1827	read (evpipe [0], &dummy, 1);
		1828	}
1355	}	1829	}
		1830
		1831	pipe_write_skipped = 0;
1356		1832
1357	#if EV_SIGNAL_ENABLE	1833	#if EV_SIGNAL_ENABLE
1358	if (sig_pending)	1834	if (sig_pending)
1359	{	1835	{
1360	sig_pending = 0;	1836	sig_pending = 0;
1361		1837
1362	for (i = EV_NSIG - 1; i--; )	1838	for (i = EV_NSIG - 1; i--; )
1363	if (expect_false (signals [i].pending))	1839	if (expect_false (signals [i].pending))
1364	ev_feed_signal_event (EV_A_ i + 1);	1840	ev_feed_signal_event (EV_A_ i + 1);
…		…
1389	EV_P = signals [signum - 1].loop;	1865	EV_P = signals [signum - 1].loop;
1390		1866
1391	if (!EV_A)	1867	if (!EV_A)
1392	return;	1868	return;
1393	#endif	1869	#endif
		1870
		1871	if (!ev_active (&pipe_w))
		1872	return;
1394		1873
1395	signals [signum - 1].pending = 1;	1874	signals [signum - 1].pending = 1;
1396	evpipe_write (EV_A_ &sig_pending);	1875	evpipe_write (EV_A_ &sig_pending);
1397	}	1876	}
1398		1877
…		…
1530	#endif	2009	#endif
1531	#if EV_USE_SELECT	2010	#if EV_USE_SELECT
1532	# include "ev_select.c"	2011	# include "ev_select.c"
1533	#endif	2012	#endif
1534		2013
1535	int	2014	int ecb_cold
1536	ev_version_major (void)	2015	ev_version_major (void)
1537	{	2016	{
1538	return EV_VERSION_MAJOR;	2017	return EV_VERSION_MAJOR;
1539	}	2018	}
1540		2019
1541	int	2020	int ecb_cold
1542	ev_version_minor (void)	2021	ev_version_minor (void)
1543	{	2022	{
1544	return EV_VERSION_MINOR;	2023	return EV_VERSION_MINOR;
1545	}	2024	}
1546		2025
1547	/* return true if we are running with elevated privileges and should ignore env variables */	2026	/* return true if we are running with elevated privileges and should ignore env variables */
1548	int inline_size	2027	int inline_size ecb_cold
1549	enable_secure (void)	2028	enable_secure (void)
1550	{	2029	{
1551	#ifdef _WIN32	2030	#ifdef _WIN32
1552	return 0;	2031	return 0;
1553	#else	2032	#else
1554	return getuid () != geteuid ()	2033	return getuid () != geteuid ()
1555	\|\| getgid () != getegid ();	2034	\|\| getgid () != getegid ();
1556	#endif	2035	#endif
1557	}	2036	}
1558		2037
1559	unsigned int	2038	unsigned int ecb_cold
1560	ev_supported_backends (void)	2039	ev_supported_backends (void)
1561	{	2040	{
1562	unsigned int flags = 0;	2041	unsigned int flags = 0;
1563		2042
1564	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	2043	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1568	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	2047	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1569		2048
1570	return flags;	2049	return flags;
1571	}	2050	}
1572		2051
1573	unsigned int	2052	unsigned int ecb_cold
1574	ev_recommended_backends (void)	2053	ev_recommended_backends (void)
1575	{	2054	{
1576	unsigned int flags = ev_supported_backends ();	2055	unsigned int flags = ev_supported_backends ();
1577		2056
1578	#ifndef __NetBSD__	2057	#ifndef __NetBSD__
…		…
1590	#endif	2069	#endif
1591		2070
1592	return flags;	2071	return flags;
1593	}	2072	}
1594		2073
1595	unsigned int	2074	unsigned int ecb_cold
1596	ev_embeddable_backends (void)	2075	ev_embeddable_backends (void)
1597	{	2076	{
1598	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	2077	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1599		2078
1600	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	2079	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1645	ev_userdata (EV_P)	2124	ev_userdata (EV_P)
1646	{	2125	{
1647	return userdata;	2126	return userdata;
1648	}	2127	}
1649		2128
		2129	void
1650	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	2130	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1651	{	2131	{
1652	invoke_cb = invoke_pending_cb;	2132	invoke_cb = invoke_pending_cb;
1653	}	2133	}
1654		2134
		2135	void
1655	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	2136	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1656	{	2137	{
1657	release_cb = release;	2138	release_cb = release;
1658	acquire_cb = acquire;	2139	acquire_cb = acquire;
1659	}	2140	}
1660	#endif	2141	#endif
1661		2142
1662	/* initialise a loop structure, must be zero-initialised */	2143	/* initialise a loop structure, must be zero-initialised */
1663	static void noinline	2144	static void noinline ecb_cold
1664	loop_init (EV_P_ unsigned int flags)	2145	loop_init (EV_P_ unsigned int flags)
1665	{	2146	{
1666	if (!backend)	2147	if (!backend)
1667	{	2148	{
1668	origflags = flags;	2149	origflags = flags;
…		…
1696	if (!(flags & EVFLAG_NOENV)	2177	if (!(flags & EVFLAG_NOENV)
1697	&& !enable_secure ()	2178	&& !enable_secure ()
1698	&& getenv ("LIBEV_FLAGS"))	2179	&& getenv ("LIBEV_FLAGS"))
1699	flags = atoi (getenv ("LIBEV_FLAGS"));	2180	flags = atoi (getenv ("LIBEV_FLAGS"));
1700		2181
1701	ev_rt_now = ev_time ();	2182	ev_rt_now = ev_time ();
1702	mn_now = get_clock ();	2183	mn_now = get_clock ();
1703	now_floor = mn_now;	2184	now_floor = mn_now;
1704	rtmn_diff = ev_rt_now - mn_now;	2185	rtmn_diff = ev_rt_now - mn_now;
1705	#if EV_FEATURE_API	2186	#if EV_FEATURE_API
1706	invoke_cb = ev_invoke_pending;	2187	invoke_cb = ev_invoke_pending;
1707	#endif	2188	#endif
1708		2189
1709	io_blocktime = 0.;	2190	io_blocktime = 0.;
1710	timeout_blocktime = 0.;	2191	timeout_blocktime = 0.;
1711	backend = 0;	2192	backend = 0;
1712	backend_fd = -1;	2193	backend_fd = -1;
1713	sig_pending = 0;	2194	sig_pending = 0;
1714	#if EV_ASYNC_ENABLE	2195	#if EV_ASYNC_ENABLE
1715	async_pending = 0;	2196	async_pending = 0;
1716	#endif	2197	#endif
		2198	pipe_write_skipped = 0;
		2199	pipe_write_wanted = 0;
1717	#if EV_USE_INOTIFY	2200	#if EV_USE_INOTIFY
1718	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	2201	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719	#endif	2202	#endif
1720	#if EV_USE_SIGNALFD	2203	#if EV_USE_SIGNALFD
1721	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	2204	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722	#endif	2205	#endif
1723		2206
1724	if (!(flags & EVBACKEND_MASK))	2207	if (!(flags & EVBACKEND_MASK))
1725	flags \|= ev_recommended_backends ();	2208	flags \|= ev_recommended_backends ();
1726		2209
…		…
1751	#endif	2234	#endif
1752	}	2235	}
1753	}	2236	}
1754		2237
1755	/* free up a loop structure */	2238	/* free up a loop structure */
1756	void	2239	void ecb_cold
1757	ev_loop_destroy (EV_P)	2240	ev_loop_destroy (EV_P)
1758	{	2241	{
1759	int i;	2242	int i;
1760		2243
1761	#if EV_MULTIPLICITY	2244	#if EV_MULTIPLICITY
…		…
1891	infy_fork (EV_A);	2374	infy_fork (EV_A);
1892	#endif	2375	#endif
1893		2376
1894	if (ev_is_active (&pipe_w))	2377	if (ev_is_active (&pipe_w))
1895	{	2378	{
1896	/* this "locks" the handlers against writing to the pipe */	2379	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1897	/* while we modify the fd vars */
1898	sig_pending = 1;
1899	#if EV_ASYNC_ENABLE
1900	async_pending = 1;
1901	#endif
1902		2380
1903	ev_ref (EV_A);	2381	ev_ref (EV_A);
1904	ev_io_stop (EV_A_ &pipe_w);	2382	ev_io_stop (EV_A_ &pipe_w);
1905		2383
1906	#if EV_USE_EVENTFD	2384	#if EV_USE_EVENTFD
…		…
1924	postfork = 0;	2402	postfork = 0;
1925	}	2403	}
1926		2404
1927	#if EV_MULTIPLICITY	2405	#if EV_MULTIPLICITY
1928		2406
1929	struct ev_loop *	2407	struct ev_loop * ecb_cold
1930	ev_loop_new (unsigned int flags)	2408	ev_loop_new (unsigned int flags)
1931	{	2409	{
1932	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2410	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933		2411
1934	memset (EV_A, 0, sizeof (struct ev_loop));	2412	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1942	}	2420	}
1943		2421
1944	#endif /* multiplicity */	2422	#endif /* multiplicity */
1945		2423
1946	#if EV_VERIFY	2424	#if EV_VERIFY
1947	static void noinline	2425	static void noinline ecb_cold
1948	verify_watcher (EV_P_ W w)	2426	verify_watcher (EV_P_ W w)
1949	{	2427	{
1950	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2428	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951		2429
1952	if (w->pending)	2430	if (w->pending)
1953	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2431	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954	}	2432	}
1955		2433
1956	static void noinline	2434	static void noinline ecb_cold
1957	verify_heap (EV_P_ ANHE *heap, int N)	2435	verify_heap (EV_P_ ANHE *heap, int N)
1958	{	2436	{
1959	int i;	2437	int i;
1960		2438
1961	for (i = HEAP0; i < N + HEAP0; ++i)	2439	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1966		2444
1967	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2445	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968	}	2446	}
1969	}	2447	}
1970		2448
1971	static void noinline	2449	static void noinline ecb_cold
1972	array_verify (EV_P_ W *ws, int cnt)	2450	array_verify (EV_P_ W *ws, int cnt)
1973	{	2451	{
1974	while (cnt--)	2452	while (cnt--)
1975	{	2453	{
1976	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2454	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1978	}	2456	}
1979	}	2457	}
1980	#endif	2458	#endif
1981		2459
1982	#if EV_FEATURE_API	2460	#if EV_FEATURE_API
1983	void	2461	void ecb_cold
1984	ev_verify (EV_P)	2462	ev_verify (EV_P)
1985	{	2463	{
1986	#if EV_VERIFY	2464	#if EV_VERIFY
1987	int i;	2465	int i;
1988	WL w;	2466	WL w;
…		…
2054	#endif	2532	#endif
2055	}	2533	}
2056	#endif	2534	#endif
2057		2535
2058	#if EV_MULTIPLICITY	2536	#if EV_MULTIPLICITY
2059	struct ev_loop *	2537	struct ev_loop * ecb_cold
2060	#else	2538	#else
2061	int	2539	int
2062	#endif	2540	#endif
2063	ev_default_loop (unsigned int flags)	2541	ev_default_loop (unsigned int flags)
2064	{	2542	{
…		…
2193	}	2671	}
2194	}	2672	}
2195		2673
2196	#if EV_PERIODIC_ENABLE	2674	#if EV_PERIODIC_ENABLE
2197		2675
2198	inline_speed	2676	static void noinline
2199	periodic_recalc (EV_P_ ev_periodic *w)	2677	periodic_recalc (EV_P_ ev_periodic *w)
2200	{	2678	{
2201	/* TODO: use slow but potentially more correct incremental algo, */	2679	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202	/* also do not rely on ceil */	2680	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2203	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2681
		2682	/* the above almost always errs on the low side */
		2683	while (at <= ev_rt_now)
		2684	{
		2685	ev_tstamp nat = at + w->interval;
		2686
		2687	/* when resolution fails us, we use ev_rt_now */
		2688	if (expect_false (nat == at))
		2689	{
		2690	at = ev_rt_now;
		2691	break;
		2692	}
		2693
		2694	at = nat;
		2695	}
		2696
		2697	ev_at (w) = at;
2204	}	2698	}
2205		2699
2206	/* make periodics pending */	2700	/* make periodics pending */
2207	inline_size void	2701	inline_size void
2208	periodics_reify (EV_P)	2702	periodics_reify (EV_P)
…		…
2230	downheap (periodics, periodiccnt, HEAP0);	2724	downheap (periodics, periodiccnt, HEAP0);
2231	}	2725	}
2232	else if (w->interval)	2726	else if (w->interval)
2233	{	2727	{
2234	periodic_recalc (EV_A_ w);	2728	periodic_recalc (EV_A_ w);
2235
2236	/* if next trigger time is not sufficiently in the future, put it there */
2237	/* this might happen because of floating point inexactness */
2238	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2239	{
2240	ev_at (w) += w->interval;
2241
2242	/* if interval is unreasonably low we might still have a time in the past */
2243	/* so correct this. this will make the periodic very inexact, but the user */
2244	/* has effectively asked to get triggered more often than possible */
2245	if (ev_at (w) < ev_rt_now)
2246	ev_at (w) = ev_rt_now;
2247	}
2248
2249	ANHE_at_cache (periodics [HEAP0]);	2729	ANHE_at_cache (periodics [HEAP0]);
2250	downheap (periodics, periodiccnt, HEAP0);	2730	downheap (periodics, periodiccnt, HEAP0);
2251	}	2731	}
2252	else	2732	else
2253	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2733	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2261	}	2741	}
2262	}	2742	}
2263		2743
2264	/* simply recalculate all periodics */	2744	/* simply recalculate all periodics */
2265	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2745	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266	static void noinline	2746	static void noinline ecb_cold
2267	periodics_reschedule (EV_P)	2747	periodics_reschedule (EV_P)
2268	{	2748	{
2269	int i;	2749	int i;
2270		2750
2271	/* adjust periodics after time jump */	2751	/* adjust periodics after time jump */
…		…
2284	reheap (periodics, periodiccnt);	2764	reheap (periodics, periodiccnt);
2285	}	2765	}
2286	#endif	2766	#endif
2287		2767
2288	/* adjust all timers by a given offset */	2768	/* adjust all timers by a given offset */
2289	static void noinline	2769	static void noinline ecb_cold
2290	timers_reschedule (EV_P_ ev_tstamp adjust)	2770	timers_reschedule (EV_P_ ev_tstamp adjust)
2291	{	2771	{
2292	int i;	2772	int i;
2293		2773
2294	for (i = 0; i < timercnt; ++i)	2774	for (i = 0; i < timercnt; ++i)
…		…
2331	* doesn't hurt either as we only do this on time-jumps or	2811	* doesn't hurt either as we only do this on time-jumps or
2332	* in the unlikely event of having been preempted here.	2812	* in the unlikely event of having been preempted here.
2333	*/	2813	*/
2334	for (i = 4; --i; )	2814	for (i = 4; --i; )
2335	{	2815	{
		2816	ev_tstamp diff;
2336	rtmn_diff = ev_rt_now - mn_now;	2817	rtmn_diff = ev_rt_now - mn_now;
2337		2818
		2819	diff = odiff - rtmn_diff;
		2820
2338	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2821	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339	return; /* all is well */	2822	return; /* all is well */
2340		2823
2341	ev_rt_now = ev_time ();	2824	ev_rt_now = ev_time ();
2342	mn_now = get_clock ();	2825	mn_now = get_clock ();
2343	now_floor = mn_now;	2826	now_floor = mn_now;
…		…
2433	ev_tstamp prev_mn_now = mn_now;	2916	ev_tstamp prev_mn_now = mn_now;
2434		2917
2435	/* update time to cancel out callback processing overhead */	2918	/* update time to cancel out callback processing overhead */
2436	time_update (EV_A_ 1e100);	2919	time_update (EV_A_ 1e100);
2437		2920
		2921	/* from now on, we want a pipe-wake-up */
		2922	pipe_write_wanted = 1;
		2923
		2924	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		2925
2438	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2926	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2439	{	2927	{
2440	waittime = MAX_BLOCKTIME;	2928	waittime = MAX_BLOCKTIME;
2441		2929
2442	if (timercnt)	2930	if (timercnt)
2443	{	2931	{
2444	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2932	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445	if (waittime > to) waittime = to;	2933	if (waittime > to) waittime = to;
2446	}	2934	}
2447		2935
2448	#if EV_PERIODIC_ENABLE	2936	#if EV_PERIODIC_ENABLE
2449	if (periodiccnt)	2937	if (periodiccnt)
2450	{	2938	{
2451	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2939	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452	if (waittime > to) waittime = to;	2940	if (waittime > to) waittime = to;
2453	}	2941	}
2454	#endif	2942	#endif
2455		2943
2456	/* don't let timeouts decrease the waittime below timeout_blocktime */	2944	/* don't let timeouts decrease the waittime below timeout_blocktime */
2457	if (expect_false (waittime < timeout_blocktime))	2945	if (expect_false (waittime < timeout_blocktime))
2458	waittime = timeout_blocktime;	2946	waittime = timeout_blocktime;
		2947
		2948	/* at this point, we NEED to wait, so we have to ensure */
		2949	/* to pass a minimum nonzero value to the backend */
		2950	if (expect_false (waittime < backend_mintime))
		2951	waittime = backend_mintime;
2459		2952
2460	/* extra check because io_blocktime is commonly 0 */	2953	/* extra check because io_blocktime is commonly 0 */
2461	if (expect_false (io_blocktime))	2954	if (expect_false (io_blocktime))
2462	{	2955	{
2463	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2956	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464		2957
2465	if (sleeptime > waittime - backend_fudge)	2958	if (sleeptime > waittime - backend_mintime)
2466	sleeptime = waittime - backend_fudge;	2959	sleeptime = waittime - backend_mintime;
2467		2960
2468	if (expect_true (sleeptime > 0.))	2961	if (expect_true (sleeptime > 0.))
2469	{	2962	{
2470	ev_sleep (sleeptime);	2963	ev_sleep (sleeptime);
2471	waittime -= sleeptime;	2964	waittime -= sleeptime;
…		…
2477	++loop_count;	2970	++loop_count;
2478	#endif	2971	#endif
2479	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2972	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480	backend_poll (EV_A_ waittime);	2973	backend_poll (EV_A_ waittime);
2481	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2974	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2975
		2976	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2977
		2978	if (pipe_write_skipped)
		2979	{
		2980	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2981	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2982	}
		2983
2482		2984
2483	/* update ev_rt_now, do magic */	2985	/* update ev_rt_now, do magic */
2484	time_update (EV_A_ waittime + sleeptime);	2986	time_update (EV_A_ waittime + sleeptime);
2485	}	2987	}
2486		2988
…		…
3063	if (!pend \|\| pend == path)	3565	if (!pend \|\| pend == path)
3064	break;	3566	break;
3065		3567
3066	*pend = 0;	3568	*pend = 0;
3067	w->wd = inotify_add_watch (fs_fd, path, mask);	3569	w->wd = inotify_add_watch (fs_fd, path, mask);
3068	}	3570	}
3069	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3571	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3070	}	3572	}
3071	}	3573	}
3072		3574
3073	if (w->wd >= 0)	3575	if (w->wd >= 0)
…		…
3140	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3642	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141	ofs += sizeof (struct inotify_event) + ev->len;	3643	ofs += sizeof (struct inotify_event) + ev->len;
3142	}	3644	}
3143	}	3645	}
3144		3646
3145	inline_size void	3647	inline_size void ecb_cold
3146	ev_check_2625 (EV_P)	3648	ev_check_2625 (EV_P)
3147	{	3649	{
3148	/* kernels < 2.6.25 are borked	3650	/* kernels < 2.6.25 are borked
3149	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3651	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150	*/	3652	*/
…		…
3775	}	4277	}
3776		4278
3777	/*****************************************************************************/	4279	/*****************************************************************************/
3778		4280
3779	#if EV_WALK_ENABLE	4281	#if EV_WALK_ENABLE
3780	void	4282	void ecb_cold
3781	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	4283	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3782	{	4284	{
3783	int i, j;	4285	int i, j;
3784	ev_watcher_list wl, wn;	4286	ev_watcher_list wl, wn;
3785		4287
…		…
3829	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));	4331	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830	#endif	4332	#endif
3831		4333
3832	#if EV_IDLE_ENABLE	4334	#if EV_IDLE_ENABLE
3833	if (types & EV_IDLE)	4335	if (types & EV_IDLE)
3834	for (j = NUMPRI; i--; )	4336	for (j = NUMPRI; j--; )
3835	for (i = idlecnt [j]; i--; )	4337	for (i = idlecnt [j]; i--; )
3836	cb (EV_A_ EV_IDLE, idles [j][i]);	4338	cb (EV_A_ EV_IDLE, idles [j][i]);
3837	#endif	4339	#endif
3838		4340
3839	#if EV_FORK_ENABLE	4341	#if EV_FORK_ENABLE

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Comparing libev/ev.c (file contents): Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs. Revision 1.392 by root, Thu Aug 4 14:37:49 2011 UTC

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Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.392 by root, Thu Aug 4 14:37:49 2011 UTC