[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 1.398 by root, Sun Sep 25 21:27:35 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) \|\| defined(__INTEL_COMPILER) \|\| defined(__clang__)
		547	#if __i386__
		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) \|\| defined(__clang__)
		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 __cplusplus
		849	template<typename T>
		850	static inline T ecb_div_rd (T val, T div)
		851	{
		852	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		853	}
		854	template<typename T>
		855	static inline T ecb_div_ru (T val, T div)
		856	{
		857	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		858	}
		859	#else
		860	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		861	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		862	#endif
		863
		864	#if ecb_cplusplus_does_not_suck
		865	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
		866	template<typename T, int N>
		867	static inline int ecb_array_length (const T (&arr)[N])
		868	{
		869	return N;
		870	}
		871	#else
		872	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		873	#endif
		874
		875	#endif
		876
		877	/* ECB.H END */
		878
		879	#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
		880	/* if your architecture doesn't need memory fences, e.g. because it is
		881	* single-cpu/core, or if you use libev in a project that doesn't use libev
		882	* from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
		883	* libev, in which casess the memory fences become nops.
		884	* alternatively, you can remove this #error and link against libpthread,
		885	* which will then provide the memory fences.
		886	*/
		887	# error "memory fences not defined for your architecture, please report"
		888	#endif
		889
		890	#ifndef ECB_MEMORY_FENCE
		891	# define ECB_MEMORY_FENCE do { } while (0)
		892	# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		893	# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		894	#endif
		895
		896	#define expect_false(cond) ecb_expect_false (cond)
		897	#define expect_true(cond) ecb_expect_true (cond)
		898	#define noinline ecb_noinline
		899
476	#define inline_size static inline	900	#define inline_size ecb_inline
477		901
478	#if EV_FEATURE_CODE	902	#if EV_FEATURE_CODE
479	# define inline_speed static inline	903	# define inline_speed ecb_inline
480	#else	904	#else
481	# define inline_speed static noinline	905	# define inline_speed static noinline
482	#endif	906	#endif
483		907
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	908	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	947	# include "ev_win32.c"
524	#endif	948	#endif
525		949
526	/*****************************************************************************/	950	/*****************************************************************************/
527		951
		952	/* define a suitable floor function (only used by periodics atm) */
		953
		954	#if EV_USE_FLOOR
		955	# include <math.h>
		956	# define ev_floor(v) floor (v)
		957	#else
		958
		959	#include <float.h>
		960
		961	/* a floor() replacement function, should be independent of ev_tstamp type */
		962	static ev_tstamp noinline
		963	ev_floor (ev_tstamp v)
		964	{
		965	/* the choice of shift factor is not terribly important */
		966	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		967	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		968	#else
		969	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		970	#endif
		971
		972	/* argument too large for an unsigned long? */
		973	if (expect_false (v >= shift))
		974	{
		975	ev_tstamp f;
		976
		977	if (v == v - 1.)
		978	return v; /* very large number */
		979
		980	f = shift * ev_floor (v * (1. / shift));
		981	return f + ev_floor (v - f);
		982	}
		983
		984	/* special treatment for negative args? */
		985	if (expect_false (v < 0.))
		986	{
		987	ev_tstamp f = -ev_floor (-v);
		988
		989	return f - (f == v ? 0 : 1);
		990	}
		991
		992	/* fits into an unsigned long */
		993	return (unsigned long)v;
		994	}
		995
		996	#endif
		997
		998	/*****************************************************************************/
		999
528	#ifdef __linux	1000	#ifdef __linux
529	# include <sys/utsname.h>	1001	# include <sys/utsname.h>
530	#endif	1002	#endif
531		1003
532	static unsigned int noinline	1004	static unsigned int noinline ecb_cold
533	ev_linux_version (void)	1005	ev_linux_version (void)
534	{	1006	{
535	#ifdef __linux	1007	#ifdef __linux
536	unsigned int v = 0;	1008	unsigned int v = 0;
537	struct utsname buf;	1009	struct utsname buf;
…		…
566	}	1038	}
567		1039
568	/*****************************************************************************/	1040	/*****************************************************************************/
569		1041
570	#if EV_AVOID_STDIO	1042	#if EV_AVOID_STDIO
571	static void noinline	1043	static void noinline ecb_cold
572	ev_printerr (const char *msg)	1044	ev_printerr (const char *msg)
573	{	1045	{
574	write (STDERR_FILENO, msg, strlen (msg));	1046	write (STDERR_FILENO, msg, strlen (msg));
575	}	1047	}
576	#endif	1048	#endif
577		1049
578	static void (syserr_cb)(const char msg);	1050	static void (syserr_cb)(const char msg);
579		1051
580	void	1052	void ecb_cold
581	ev_set_syserr_cb (void (cb)(const char msg))	1053	ev_set_syserr_cb (void (cb)(const char msg))
582	{	1054	{
583	syserr_cb = cb;	1055	syserr_cb = cb;
584	}	1056	}
585		1057
586	static void noinline	1058	static void noinline ecb_cold
587	ev_syserr (const char *msg)	1059	ev_syserr (const char *msg)
588	{	1060	{
589	if (!msg)	1061	if (!msg)
590	msg = "(libev) system error";	1062	msg = "(libev) system error";
591		1063
…		…
624	#endif	1096	#endif
625	}	1097	}
626		1098
627	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	1099	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
628		1100
629	void	1101	void ecb_cold
630	ev_set_allocator (void (cb)(void *ptr, long size))	1102	ev_set_allocator (void (cb)(void *ptr, long size))
631	{	1103	{
632	alloc = cb;	1104	alloc = cb;
633	}	1105	}
634		1106
…		…
816	select (0, 0, 0, 0, &tv);	1288	select (0, 0, 0, 0, &tv);
817	#endif	1289	#endif
818	}	1290	}
819	}	1291	}
820		1292
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	/*****************************************************************************/	1293	/*****************************************************************************/
830		1294
831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	1295	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
832		1296
833	/* find a suitable new size for the given array, */	1297	/* find a suitable new size for the given array, */
…		…
851	}	1315	}
852		1316
853	return ncur;	1317	return ncur;
854	}	1318	}
855		1319
856	static noinline void *	1320	static void * noinline ecb_cold
857	array_realloc (int elem, void base, int cur, int cnt)	1321	array_realloc (int elem, void base, int cur, int cnt)
858	{	1322	{
859	cur = array_nextsize (elem, cur, cnt);	1323	cur = array_nextsize (elem, cur, cnt);
860	return ev_realloc (base, elem * *cur);	1324	return ev_realloc (base, elem * *cur);
861	}	1325	}
…		…
864	memset ((void )(base), 0, sizeof ((base)) * (count))	1328	memset ((void )(base), 0, sizeof ((base)) * (count))
865		1329
866	#define array_needsize(type,base,cur,cnt,init) \	1330	#define array_needsize(type,base,cur,cnt,init) \
867	if (expect_false ((cnt) > (cur))) \	1331	if (expect_false ((cnt) > (cur))) \
868	{ \	1332	{ \
869	int ocur_ = (cur); \	1333	int ecb_unused ocur_ = (cur); \
870	(base) = (type *)array_realloc \	1334	(base) = (type *)array_realloc \
871	(sizeof (type), (base), &(cur), (cnt)); \	1335	(sizeof (type), (base), &(cur), (cnt)); \
872	init ((base) + (ocur_), (cur) - ocur_); \	1336	init ((base) + (ocur_), (cur) - ocur_); \
873	}	1337	}
874		1338
…		…
974	inline_size void	1438	inline_size void
975	fd_reify (EV_P)	1439	fd_reify (EV_P)
976	{	1440	{
977	int i;	1441	int i;
978		1442
		1443	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1444	for (i = 0; i < fdchangecnt; ++i)
		1445	{
		1446	int fd = fdchanges [i];
		1447	ANFD *anfd = anfds + fd;
		1448
		1449	if (anfd->reify & EV__IOFDSET && anfd->head)
		1450	{
		1451	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1452
		1453	if (handle != anfd->handle)
		1454	{
		1455	unsigned long arg;
		1456
		1457	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1458
		1459	/* handle changed, but fd didn't - we need to do it in two steps */
		1460	backend_modify (EV_A_ fd, anfd->events, 0);
		1461	anfd->events = 0;
		1462	anfd->handle = handle;
		1463	}
		1464	}
		1465	}
		1466	#endif
		1467
979	for (i = 0; i < fdchangecnt; ++i)	1468	for (i = 0; i < fdchangecnt; ++i)
980	{	1469	{
981	int fd = fdchanges [i];	1470	int fd = fdchanges [i];
982	ANFD *anfd = anfds + fd;	1471	ANFD *anfd = anfds + fd;
983	ev_io *w;	1472	ev_io *w;
…		…
985	unsigned char o_events = anfd->events;	1474	unsigned char o_events = anfd->events;
986	unsigned char o_reify = anfd->reify;	1475	unsigned char o_reify = anfd->reify;
987		1476
988	anfd->reify = 0;	1477	anfd->reify = 0;
989		1478
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 /	1479	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
1001	{	1480	{
1002	anfd->events = 0;	1481	anfd->events = 0;
1003		1482
1004	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1483	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1029	fdchanges [fdchangecnt - 1] = fd;	1508	fdchanges [fdchangecnt - 1] = fd;
1030	}	1509	}
1031	}	1510	}
1032		1511
1033	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1512	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034	inline_speed void	1513	inline_speed void ecb_cold
1035	fd_kill (EV_P_ int fd)	1514	fd_kill (EV_P_ int fd)
1036	{	1515	{
1037	ev_io *w;	1516	ev_io *w;
1038		1517
1039	while ((w = (ev_io *)anfds [fd].head))	1518	while ((w = (ev_io *)anfds [fd].head))
…		…
1042	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1521	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1043	}	1522	}
1044	}	1523	}
1045		1524
1046	/* check whether the given fd is actually valid, for error recovery */	1525	/* check whether the given fd is actually valid, for error recovery */
1047	inline_size int	1526	inline_size int ecb_cold
1048	fd_valid (int fd)	1527	fd_valid (int fd)
1049	{	1528	{
1050	#ifdef _WIN32	1529	#ifdef _WIN32
1051	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1530	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052	#else	1531	#else
1053	return fcntl (fd, F_GETFD) != -1;	1532	return fcntl (fd, F_GETFD) != -1;
1054	#endif	1533	#endif
1055	}	1534	}
1056		1535
1057	/* called on EBADF to verify fds */	1536	/* called on EBADF to verify fds */
1058	static void noinline	1537	static void noinline ecb_cold
1059	fd_ebadf (EV_P)	1538	fd_ebadf (EV_P)
1060	{	1539	{
1061	int fd;	1540	int fd;
1062		1541
1063	for (fd = 0; fd < anfdmax; ++fd)	1542	for (fd = 0; fd < anfdmax; ++fd)
…		…
1065	if (!fd_valid (fd) && errno == EBADF)	1544	if (!fd_valid (fd) && errno == EBADF)
1066	fd_kill (EV_A_ fd);	1545	fd_kill (EV_A_ fd);
1067	}	1546	}
1068		1547
1069	/* called on ENOMEM in select/poll to kill some fds and retry */	1548	/* called on ENOMEM in select/poll to kill some fds and retry */
1070	static void noinline	1549	static void noinline ecb_cold
1071	fd_enomem (EV_P)	1550	fd_enomem (EV_P)
1072	{	1551	{
1073	int fd;	1552	int fd;
1074		1553
1075	for (fd = anfdmax; fd--; )	1554	for (fd = anfdmax; fd--; )
…		…
1270		1749
1271	/*****************************************************************************/	1750	/*****************************************************************************/
1272		1751
1273	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1752	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1274		1753
1275	static void noinline	1754	static void noinline ecb_cold
1276	evpipe_init (EV_P)	1755	evpipe_init (EV_P)
1277	{	1756	{
1278	if (!ev_is_active (&pipe_w))	1757	if (!ev_is_active (&pipe_w))
1279	{	1758	{
1280	# if EV_USE_EVENTFD	1759	# if EV_USE_EVENTFD
…		…
1302	ev_io_start (EV_A_ &pipe_w);	1781	ev_io_start (EV_A_ &pipe_w);
1303	ev_unref (EV_A); /* watcher should not keep loop alive */	1782	ev_unref (EV_A); /* watcher should not keep loop alive */
1304	}	1783	}
1305	}	1784	}
1306		1785
1307	inline_size void	1786	inline_speed void
1308	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1787	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309	{	1788	{
1310	if (!*flag)	1789	if (expect_true (*flag))
		1790	return;
		1791
		1792	*flag = 1;
		1793
		1794	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1795
		1796	pipe_write_skipped = 1;
		1797
		1798	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1799
		1800	if (pipe_write_wanted)
1311	{	1801	{
		1802	int old_errno;
		1803
		1804	pipe_write_skipped = 0; /* just an optimisation, no fence needed */
		1805
1312	int old_errno = errno; /* save errno because write might clobber it */	1806	old_errno = errno; /* save errno because write will clobber it */
1313	char dummy;
1314
1315	*flag = 1;
1316		1807
1317	#if EV_USE_EVENTFD	1808	#if EV_USE_EVENTFD
1318	if (evfd >= 0)	1809	if (evfd >= 0)
1319	{	1810	{
1320	uint64_t counter = 1;	1811	uint64_t counter = 1;
1321	write (evfd, &counter, sizeof (uint64_t));	1812	write (evfd, &counter, sizeof (uint64_t));
1322	}	1813	}
1323	else	1814	else
1324	#endif	1815	#endif
		1816	{
1325	/* win32 people keep sending patches that change this write() to send() */	1817	/* 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 */	1818	/* 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 */	1819	/* 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 */	1820	/* where your send() is from - it's definitely not the microsoft send, and */
1329	/* tell me. thank you. */	1821	/* tell me. thank you. */
1330	write (evpipe [1], &dummy, 1);	1822	write (evpipe [1], &(evpipe [1]), 1);
		1823	}
1331		1824
1332	errno = old_errno;	1825	errno = old_errno;
1333	}	1826	}
1334	}	1827	}
1335		1828
…		…
1338	static void	1831	static void
1339	pipecb (EV_P_ ev_io *iow, int revents)	1832	pipecb (EV_P_ ev_io *iow, int revents)
1340	{	1833	{
1341	int i;	1834	int i;
1342		1835
		1836	if (revents & EV_READ)
		1837	{
1343	#if EV_USE_EVENTFD	1838	#if EV_USE_EVENTFD
1344	if (evfd >= 0)	1839	if (evfd >= 0)
1345	{	1840	{
1346	uint64_t counter;	1841	uint64_t counter;
1347	read (evfd, &counter, sizeof (uint64_t));	1842	read (evfd, &counter, sizeof (uint64_t));
1348	}	1843	}
1349	else	1844	else
1350	#endif	1845	#endif
1351	{	1846	{
1352	char dummy;	1847	char dummy;
1353	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1848	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1354	read (evpipe [0], &dummy, 1);	1849	read (evpipe [0], &dummy, 1);
		1850	}
1355	}	1851	}
		1852
		1853	pipe_write_skipped = 0;
1356		1854
1357	#if EV_SIGNAL_ENABLE	1855	#if EV_SIGNAL_ENABLE
1358	if (sig_pending)	1856	if (sig_pending)
1359	{	1857	{
1360	sig_pending = 0;	1858	sig_pending = 0;
1361		1859
1362	for (i = EV_NSIG - 1; i--; )	1860	for (i = EV_NSIG - 1; i--; )
1363	if (expect_false (signals [i].pending))	1861	if (expect_false (signals [i].pending))
1364	ev_feed_signal_event (EV_A_ i + 1);	1862	ev_feed_signal_event (EV_A_ i + 1);
…		…
1389	EV_P = signals [signum - 1].loop;	1887	EV_P = signals [signum - 1].loop;
1390		1888
1391	if (!EV_A)	1889	if (!EV_A)
1392	return;	1890	return;
1393	#endif	1891	#endif
		1892
		1893	if (!ev_active (&pipe_w))
		1894	return;
1394		1895
1395	signals [signum - 1].pending = 1;	1896	signals [signum - 1].pending = 1;
1396	evpipe_write (EV_A_ &sig_pending);	1897	evpipe_write (EV_A_ &sig_pending);
1397	}	1898	}
1398		1899
…		…
1530	#endif	2031	#endif
1531	#if EV_USE_SELECT	2032	#if EV_USE_SELECT
1532	# include "ev_select.c"	2033	# include "ev_select.c"
1533	#endif	2034	#endif
1534		2035
1535	int	2036	int ecb_cold
1536	ev_version_major (void)	2037	ev_version_major (void)
1537	{	2038	{
1538	return EV_VERSION_MAJOR;	2039	return EV_VERSION_MAJOR;
1539	}	2040	}
1540		2041
1541	int	2042	int ecb_cold
1542	ev_version_minor (void)	2043	ev_version_minor (void)
1543	{	2044	{
1544	return EV_VERSION_MINOR;	2045	return EV_VERSION_MINOR;
1545	}	2046	}
1546		2047
1547	/* return true if we are running with elevated privileges and should ignore env variables */	2048	/* return true if we are running with elevated privileges and should ignore env variables */
1548	int inline_size	2049	int inline_size ecb_cold
1549	enable_secure (void)	2050	enable_secure (void)
1550	{	2051	{
1551	#ifdef _WIN32	2052	#ifdef _WIN32
1552	return 0;	2053	return 0;
1553	#else	2054	#else
1554	return getuid () != geteuid ()	2055	return getuid () != geteuid ()
1555	\|\| getgid () != getegid ();	2056	\|\| getgid () != getegid ();
1556	#endif	2057	#endif
1557	}	2058	}
1558		2059
1559	unsigned int	2060	unsigned int ecb_cold
1560	ev_supported_backends (void)	2061	ev_supported_backends (void)
1561	{	2062	{
1562	unsigned int flags = 0;	2063	unsigned int flags = 0;
1563		2064
1564	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	2065	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1568	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	2069	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1569		2070
1570	return flags;	2071	return flags;
1571	}	2072	}
1572		2073
1573	unsigned int	2074	unsigned int ecb_cold
1574	ev_recommended_backends (void)	2075	ev_recommended_backends (void)
1575	{	2076	{
1576	unsigned int flags = ev_supported_backends ();	2077	unsigned int flags = ev_supported_backends ();
1577		2078
1578	#ifndef __NetBSD__	2079	#ifndef __NetBSD__
…		…
1590	#endif	2091	#endif
1591		2092
1592	return flags;	2093	return flags;
1593	}	2094	}
1594		2095
1595	unsigned int	2096	unsigned int ecb_cold
1596	ev_embeddable_backends (void)	2097	ev_embeddable_backends (void)
1597	{	2098	{
1598	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	2099	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1599		2100
1600	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	2101	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1645	ev_userdata (EV_P)	2146	ev_userdata (EV_P)
1646	{	2147	{
1647	return userdata;	2148	return userdata;
1648	}	2149	}
1649		2150
		2151	void
1650	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	2152	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1651	{	2153	{
1652	invoke_cb = invoke_pending_cb;	2154	invoke_cb = invoke_pending_cb;
1653	}	2155	}
1654		2156
		2157	void
1655	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	2158	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1656	{	2159	{
1657	release_cb = release;	2160	release_cb = release;
1658	acquire_cb = acquire;	2161	acquire_cb = acquire;
1659	}	2162	}
1660	#endif	2163	#endif
1661		2164
1662	/* initialise a loop structure, must be zero-initialised */	2165	/* initialise a loop structure, must be zero-initialised */
1663	static void noinline	2166	static void noinline ecb_cold
1664	loop_init (EV_P_ unsigned int flags)	2167	loop_init (EV_P_ unsigned int flags)
1665	{	2168	{
1666	if (!backend)	2169	if (!backend)
1667	{	2170	{
1668	origflags = flags;	2171	origflags = flags;
…		…
1696	if (!(flags & EVFLAG_NOENV)	2199	if (!(flags & EVFLAG_NOENV)
1697	&& !enable_secure ()	2200	&& !enable_secure ()
1698	&& getenv ("LIBEV_FLAGS"))	2201	&& getenv ("LIBEV_FLAGS"))
1699	flags = atoi (getenv ("LIBEV_FLAGS"));	2202	flags = atoi (getenv ("LIBEV_FLAGS"));
1700		2203
1701	ev_rt_now = ev_time ();	2204	ev_rt_now = ev_time ();
1702	mn_now = get_clock ();	2205	mn_now = get_clock ();
1703	now_floor = mn_now;	2206	now_floor = mn_now;
1704	rtmn_diff = ev_rt_now - mn_now;	2207	rtmn_diff = ev_rt_now - mn_now;
1705	#if EV_FEATURE_API	2208	#if EV_FEATURE_API
1706	invoke_cb = ev_invoke_pending;	2209	invoke_cb = ev_invoke_pending;
1707	#endif	2210	#endif
1708		2211
1709	io_blocktime = 0.;	2212	io_blocktime = 0.;
1710	timeout_blocktime = 0.;	2213	timeout_blocktime = 0.;
1711	backend = 0;	2214	backend = 0;
1712	backend_fd = -1;	2215	backend_fd = -1;
1713	sig_pending = 0;	2216	sig_pending = 0;
1714	#if EV_ASYNC_ENABLE	2217	#if EV_ASYNC_ENABLE
1715	async_pending = 0;	2218	async_pending = 0;
1716	#endif	2219	#endif
		2220	pipe_write_skipped = 0;
		2221	pipe_write_wanted = 0;
1717	#if EV_USE_INOTIFY	2222	#if EV_USE_INOTIFY
1718	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	2223	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719	#endif	2224	#endif
1720	#if EV_USE_SIGNALFD	2225	#if EV_USE_SIGNALFD
1721	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	2226	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722	#endif	2227	#endif
1723		2228
1724	if (!(flags & EVBACKEND_MASK))	2229	if (!(flags & EVBACKEND_MASK))
1725	flags \|= ev_recommended_backends ();	2230	flags \|= ev_recommended_backends ();
1726		2231
…		…
1751	#endif	2256	#endif
1752	}	2257	}
1753	}	2258	}
1754		2259
1755	/* free up a loop structure */	2260	/* free up a loop structure */
1756	void	2261	void ecb_cold
1757	ev_loop_destroy (EV_P)	2262	ev_loop_destroy (EV_P)
1758	{	2263	{
1759	int i;	2264	int i;
1760		2265
1761	#if EV_MULTIPLICITY	2266	#if EV_MULTIPLICITY
…		…
1891	infy_fork (EV_A);	2396	infy_fork (EV_A);
1892	#endif	2397	#endif
1893		2398
1894	if (ev_is_active (&pipe_w))	2399	if (ev_is_active (&pipe_w))
1895	{	2400	{
1896	/* this "locks" the handlers against writing to the pipe */	2401	/* 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		2402
1903	ev_ref (EV_A);	2403	ev_ref (EV_A);
1904	ev_io_stop (EV_A_ &pipe_w);	2404	ev_io_stop (EV_A_ &pipe_w);
1905		2405
1906	#if EV_USE_EVENTFD	2406	#if EV_USE_EVENTFD
…		…
1924	postfork = 0;	2424	postfork = 0;
1925	}	2425	}
1926		2426
1927	#if EV_MULTIPLICITY	2427	#if EV_MULTIPLICITY
1928		2428
1929	struct ev_loop *	2429	struct ev_loop * ecb_cold
1930	ev_loop_new (unsigned int flags)	2430	ev_loop_new (unsigned int flags)
1931	{	2431	{
1932	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2432	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933		2433
1934	memset (EV_A, 0, sizeof (struct ev_loop));	2434	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1942	}	2442	}
1943		2443
1944	#endif /* multiplicity */	2444	#endif /* multiplicity */
1945		2445
1946	#if EV_VERIFY	2446	#if EV_VERIFY
1947	static void noinline	2447	static void noinline ecb_cold
1948	verify_watcher (EV_P_ W w)	2448	verify_watcher (EV_P_ W w)
1949	{	2449	{
1950	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2450	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951		2451
1952	if (w->pending)	2452	if (w->pending)
1953	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2453	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954	}	2454	}
1955		2455
1956	static void noinline	2456	static void noinline ecb_cold
1957	verify_heap (EV_P_ ANHE *heap, int N)	2457	verify_heap (EV_P_ ANHE *heap, int N)
1958	{	2458	{
1959	int i;	2459	int i;
1960		2460
1961	for (i = HEAP0; i < N + HEAP0; ++i)	2461	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1966		2466
1967	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2467	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968	}	2468	}
1969	}	2469	}
1970		2470
1971	static void noinline	2471	static void noinline ecb_cold
1972	array_verify (EV_P_ W *ws, int cnt)	2472	array_verify (EV_P_ W *ws, int cnt)
1973	{	2473	{
1974	while (cnt--)	2474	while (cnt--)
1975	{	2475	{
1976	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2476	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1978	}	2478	}
1979	}	2479	}
1980	#endif	2480	#endif
1981		2481
1982	#if EV_FEATURE_API	2482	#if EV_FEATURE_API
1983	void	2483	void ecb_cold
1984	ev_verify (EV_P)	2484	ev_verify (EV_P)
1985	{	2485	{
1986	#if EV_VERIFY	2486	#if EV_VERIFY
1987	int i;	2487	int i;
1988	WL w;	2488	WL w;
…		…
2054	#endif	2554	#endif
2055	}	2555	}
2056	#endif	2556	#endif
2057		2557
2058	#if EV_MULTIPLICITY	2558	#if EV_MULTIPLICITY
2059	struct ev_loop *	2559	struct ev_loop * ecb_cold
2060	#else	2560	#else
2061	int	2561	int
2062	#endif	2562	#endif
2063	ev_default_loop (unsigned int flags)	2563	ev_default_loop (unsigned int flags)
2064	{	2564	{
…		…
2193	}	2693	}
2194	}	2694	}
2195		2695
2196	#if EV_PERIODIC_ENABLE	2696	#if EV_PERIODIC_ENABLE
2197		2697
2198	inline_speed	2698	static void noinline
2199	periodic_recalc (EV_P_ ev_periodic *w)	2699	periodic_recalc (EV_P_ ev_periodic *w)
2200	{	2700	{
2201	/* TODO: use slow but potentially more correct incremental algo, */	2701	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202	/* also do not rely on ceil */	2702	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;	2703
		2704	/* the above almost always errs on the low side */
		2705	while (at <= ev_rt_now)
		2706	{
		2707	ev_tstamp nat = at + w->interval;
		2708
		2709	/* when resolution fails us, we use ev_rt_now */
		2710	if (expect_false (nat == at))
		2711	{
		2712	at = ev_rt_now;
		2713	break;
		2714	}
		2715
		2716	at = nat;
		2717	}
		2718
		2719	ev_at (w) = at;
2204	}	2720	}
2205		2721
2206	/* make periodics pending */	2722	/* make periodics pending */
2207	inline_size void	2723	inline_size void
2208	periodics_reify (EV_P)	2724	periodics_reify (EV_P)
…		…
2230	downheap (periodics, periodiccnt, HEAP0);	2746	downheap (periodics, periodiccnt, HEAP0);
2231	}	2747	}
2232	else if (w->interval)	2748	else if (w->interval)
2233	{	2749	{
2234	periodic_recalc (EV_A_ w);	2750	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]);	2751	ANHE_at_cache (periodics [HEAP0]);
2250	downheap (periodics, periodiccnt, HEAP0);	2752	downheap (periodics, periodiccnt, HEAP0);
2251	}	2753	}
2252	else	2754	else
2253	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2755	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2261	}	2763	}
2262	}	2764	}
2263		2765
2264	/* simply recalculate all periodics */	2766	/* simply recalculate all periodics */
2265	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2767	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266	static void noinline	2768	static void noinline ecb_cold
2267	periodics_reschedule (EV_P)	2769	periodics_reschedule (EV_P)
2268	{	2770	{
2269	int i;	2771	int i;
2270		2772
2271	/* adjust periodics after time jump */	2773	/* adjust periodics after time jump */
…		…
2284	reheap (periodics, periodiccnt);	2786	reheap (periodics, periodiccnt);
2285	}	2787	}
2286	#endif	2788	#endif
2287		2789
2288	/* adjust all timers by a given offset */	2790	/* adjust all timers by a given offset */
2289	static void noinline	2791	static void noinline ecb_cold
2290	timers_reschedule (EV_P_ ev_tstamp adjust)	2792	timers_reschedule (EV_P_ ev_tstamp adjust)
2291	{	2793	{
2292	int i;	2794	int i;
2293		2795
2294	for (i = 0; i < timercnt; ++i)	2796	for (i = 0; i < timercnt; ++i)
…		…
2331	* doesn't hurt either as we only do this on time-jumps or	2833	* doesn't hurt either as we only do this on time-jumps or
2332	* in the unlikely event of having been preempted here.	2834	* in the unlikely event of having been preempted here.
2333	*/	2835	*/
2334	for (i = 4; --i; )	2836	for (i = 4; --i; )
2335	{	2837	{
		2838	ev_tstamp diff;
2336	rtmn_diff = ev_rt_now - mn_now;	2839	rtmn_diff = ev_rt_now - mn_now;
2337		2840
		2841	diff = odiff - rtmn_diff;
		2842
2338	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2843	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339	return; /* all is well */	2844	return; /* all is well */
2340		2845
2341	ev_rt_now = ev_time ();	2846	ev_rt_now = ev_time ();
2342	mn_now = get_clock ();	2847	mn_now = get_clock ();
2343	now_floor = mn_now;	2848	now_floor = mn_now;
…		…
2433	ev_tstamp prev_mn_now = mn_now;	2938	ev_tstamp prev_mn_now = mn_now;
2434		2939
2435	/* update time to cancel out callback processing overhead */	2940	/* update time to cancel out callback processing overhead */
2436	time_update (EV_A_ 1e100);	2941	time_update (EV_A_ 1e100);
2437		2942
		2943	/* from now on, we want a pipe-wake-up */
		2944	pipe_write_wanted = 1;
		2945
		2946	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		2947
2438	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2948	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2439	{	2949	{
2440	waittime = MAX_BLOCKTIME;	2950	waittime = MAX_BLOCKTIME;
2441		2951
2442	if (timercnt)	2952	if (timercnt)
2443	{	2953	{
2444	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2954	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445	if (waittime > to) waittime = to;	2955	if (waittime > to) waittime = to;
2446	}	2956	}
2447		2957
2448	#if EV_PERIODIC_ENABLE	2958	#if EV_PERIODIC_ENABLE
2449	if (periodiccnt)	2959	if (periodiccnt)
2450	{	2960	{
2451	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2961	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452	if (waittime > to) waittime = to;	2962	if (waittime > to) waittime = to;
2453	}	2963	}
2454	#endif	2964	#endif
2455		2965
2456	/* don't let timeouts decrease the waittime below timeout_blocktime */	2966	/* don't let timeouts decrease the waittime below timeout_blocktime */
2457	if (expect_false (waittime < timeout_blocktime))	2967	if (expect_false (waittime < timeout_blocktime))
2458	waittime = timeout_blocktime;	2968	waittime = timeout_blocktime;
		2969
		2970	/* at this point, we NEED to wait, so we have to ensure */
		2971	/* to pass a minimum nonzero value to the backend */
		2972	if (expect_false (waittime < backend_mintime))
		2973	waittime = backend_mintime;
2459		2974
2460	/* extra check because io_blocktime is commonly 0 */	2975	/* extra check because io_blocktime is commonly 0 */
2461	if (expect_false (io_blocktime))	2976	if (expect_false (io_blocktime))
2462	{	2977	{
2463	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2978	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464		2979
2465	if (sleeptime > waittime - backend_fudge)	2980	if (sleeptime > waittime - backend_mintime)
2466	sleeptime = waittime - backend_fudge;	2981	sleeptime = waittime - backend_mintime;
2467		2982
2468	if (expect_true (sleeptime > 0.))	2983	if (expect_true (sleeptime > 0.))
2469	{	2984	{
2470	ev_sleep (sleeptime);	2985	ev_sleep (sleeptime);
2471	waittime -= sleeptime;	2986	waittime -= sleeptime;
…		…
2477	++loop_count;	2992	++loop_count;
2478	#endif	2993	#endif
2479	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2994	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480	backend_poll (EV_A_ waittime);	2995	backend_poll (EV_A_ waittime);
2481	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2996	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2997
		2998	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2999
		3000	if (pipe_write_skipped)
		3001	{
		3002	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		3003	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		3004	}
		3005
2482		3006
2483	/* update ev_rt_now, do magic */	3007	/* update ev_rt_now, do magic */
2484	time_update (EV_A_ waittime + sleeptime);	3008	time_update (EV_A_ waittime + sleeptime);
2485	}	3009	}
2486		3010
…		…
3063	if (!pend \|\| pend == path)	3587	if (!pend \|\| pend == path)
3064	break;	3588	break;
3065		3589
3066	*pend = 0;	3590	*pend = 0;
3067	w->wd = inotify_add_watch (fs_fd, path, mask);	3591	w->wd = inotify_add_watch (fs_fd, path, mask);
3068	}	3592	}
3069	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3593	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3070	}	3594	}
3071	}	3595	}
3072		3596
3073	if (w->wd >= 0)	3597	if (w->wd >= 0)
…		…
3140	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3664	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141	ofs += sizeof (struct inotify_event) + ev->len;	3665	ofs += sizeof (struct inotify_event) + ev->len;
3142	}	3666	}
3143	}	3667	}
3144		3668
3145	inline_size void	3669	inline_size void ecb_cold
3146	ev_check_2625 (EV_P)	3670	ev_check_2625 (EV_P)
3147	{	3671	{
3148	/* kernels < 2.6.25 are borked	3672	/* kernels < 2.6.25 are borked
3149	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3673	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150	*/	3674	*/
…		…
3775	}	4299	}
3776		4300
3777	/*****************************************************************************/	4301	/*****************************************************************************/
3778		4302
3779	#if EV_WALK_ENABLE	4303	#if EV_WALK_ENABLE
3780	void	4304	void ecb_cold
3781	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	4305	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3782	{	4306	{
3783	int i, j;	4307	int i, j;
3784	ev_watcher_list wl, wn;	4308	ev_watcher_list wl, wn;
3785		4309
…		…
3829	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));	4353	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830	#endif	4354	#endif
3831		4355
3832	#if EV_IDLE_ENABLE	4356	#if EV_IDLE_ENABLE
3833	if (types & EV_IDLE)	4357	if (types & EV_IDLE)
3834	for (j = NUMPRI; i--; )	4358	for (j = NUMPRI; j--; )
3835	for (i = idlecnt [j]; i--; )	4359	for (i = idlecnt [j]; i--; )
3836	cb (EV_A_ EV_IDLE, idles [j][i]);	4360	cb (EV_A_ EV_IDLE, idles [j][i]);
3837	#endif	4361	#endif
3838		4362
3839	#if EV_FORK_ENABLE	4363	#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 1.398 by root, Sun Sep 25 21:27:35 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.398 by root, Sun Sep 25 21:27:35 2011 UTC