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

Comparing libev/ev.c (file contents):
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs.
Revision 1.391 by root, Thu Aug 4 13:57:16 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	#endif
		558	#endif
		559	#endif
		560
		561	#ifndef ECB_MEMORY_FENCE
		562	#if ECB_GCC_VERSION(4,4)
		563	#define ECB_MEMORY_FENCE __sync_synchronize ()
		564	#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
		565	#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
		566	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		567	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		568	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		569	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		570	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		571	#elif defined(_WIN32)
		572	#include <WinNT.h>
		573	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		574	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		575	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		576	#endif
		577	#endif
		578
		579	#ifndef ECB_MEMORY_FENCE
		580	/*
		581	* if you get undefined symbol references to pthread_mutex_lock,
		582	* or failure to find pthread.h, then you should implement
		583	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		584	* OR provide pthread.h and link against the posix thread library
		585	* of your system.
		586	*/
		587	#include <pthread.h>
		588	#define ECB_NEEDS_PTHREADS 1
		589	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		590
		591	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		592	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		593	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		594	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		595	#endif
		596
		597	/*****************************************************************************/
		598
		599	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		600
		601	#if __cplusplus
		602	#define ecb_inline static inline
		603	#elif ECB_GCC_VERSION(2,5)
		604	#define ecb_inline static __inline__
		605	#elif ECB_C99
		606	#define ecb_inline static inline
		607	#else
		608	#define ecb_inline static
		609	#endif
		610
		611	#if ECB_GCC_VERSION(3,3)
		612	#define ecb_restrict __restrict__
		613	#elif ECB_C99
		614	#define ecb_restrict restrict
		615	#else
		616	#define ecb_restrict
		617	#endif
		618
		619	typedef int ecb_bool;
		620
		621	#define ECB_CONCAT_(a, b) a ## b
		622	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
		623	#define ECB_STRINGIFY_(a) # a
		624	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		625
		626	#define ecb_function_ ecb_inline
		627
		628	#if ECB_GCC_VERSION(3,1)
		629	#define ecb_attribute(attrlist) __attribute__(attrlist)
		630	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		631	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		632	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		633	#else
		634	#define ecb_attribute(attrlist)
		635	#define ecb_is_constant(expr) 0
		636	#define ecb_expect(expr,value) (expr)
		637	#define ecb_prefetch(addr,rw,locality)
		638	#endif
		639
		640	/* no emulation for ecb_decltype */
		641	#if ECB_GCC_VERSION(4,5)
		642	#define ecb_decltype(x) __decltype(x)
		643	#elif ECB_GCC_VERSION(3,0)
		644	#define ecb_decltype(x) __typeof(x)
		645	#endif
		646
		647	#define ecb_noinline ecb_attribute ((__noinline__))
		648	#define ecb_noreturn ecb_attribute ((__noreturn__))
		649	#define ecb_unused ecb_attribute ((__unused__))
		650	#define ecb_const ecb_attribute ((__const__))
		651	#define ecb_pure ecb_attribute ((__pure__))
		652
		653	#if ECB_GCC_VERSION(4,3)
		654	#define ecb_artificial ecb_attribute ((__artificial__))
		655	#define ecb_hot ecb_attribute ((__hot__))
		656	#define ecb_cold ecb_attribute ((__cold__))
		657	#else
		658	#define ecb_artificial
		659	#define ecb_hot
		660	#define ecb_cold
		661	#endif
		662
		663	/* put around conditional expressions if you are very sure that the */
		664	/* expression is mostly true or mostly false. note that these return */
		665	/* booleans, not the expression. */
474	#define expect_false(expr) expect ((expr) != 0, 0)	666	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475	#define expect_true(expr) expect ((expr) != 0, 1)	667	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		668	/* for compatibility to the rest of the world */
		669	#define ecb_likely(expr) ecb_expect_true (expr)
		670	#define ecb_unlikely(expr) ecb_expect_false (expr)
		671
		672	/* count trailing zero bits and count # of one bits */
		673	#if ECB_GCC_VERSION(3,4)
		674	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		675	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		676	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		677	#define ecb_ctz32(x) __builtin_ctz (x)
		678	#define ecb_ctz64(x) __builtin_ctzll (x)
		679	#define ecb_popcount32(x) __builtin_popcount (x)
		680	/* no popcountll */
		681	#else
		682	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		683	ecb_function_ int
		684	ecb_ctz32 (uint32_t x)
		685	{
		686	int r = 0;
		687
		688	x &= ~x + 1; /* this isolates the lowest bit */
		689
		690	#if ECB_branchless_on_i386
		691	r += !!(x & 0xaaaaaaaa) << 0;
		692	r += !!(x & 0xcccccccc) << 1;
		693	r += !!(x & 0xf0f0f0f0) << 2;
		694	r += !!(x & 0xff00ff00) << 3;
		695	r += !!(x & 0xffff0000) << 4;
		696	#else
		697	if (x & 0xaaaaaaaa) r += 1;
		698	if (x & 0xcccccccc) r += 2;
		699	if (x & 0xf0f0f0f0) r += 4;
		700	if (x & 0xff00ff00) r += 8;
		701	if (x & 0xffff0000) r += 16;
		702	#endif
		703
		704	return r;
		705	}
		706
		707	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		708	ecb_function_ int
		709	ecb_ctz64 (uint64_t x)
		710	{
		711	int shift = x & 0xffffffffU ? 0 : 32;
		712	return ecb_ctz32 (x >> shift) + shift;
		713	}
		714
		715	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		716	ecb_function_ int
		717	ecb_popcount32 (uint32_t x)
		718	{
		719	x -= (x >> 1) & 0x55555555;
		720	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		721	x = ((x >> 4) + x) & 0x0f0f0f0f;
		722	x *= 0x01010101;
		723
		724	return x >> 24;
		725	}
		726
		727	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		728	ecb_function_ int ecb_ld32 (uint32_t x)
		729	{
		730	int r = 0;
		731
		732	if (x >> 16) { x >>= 16; r += 16; }
		733	if (x >> 8) { x >>= 8; r += 8; }
		734	if (x >> 4) { x >>= 4; r += 4; }
		735	if (x >> 2) { x >>= 2; r += 2; }
		736	if (x >> 1) { r += 1; }
		737
		738	return r;
		739	}
		740
		741	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		742	ecb_function_ int ecb_ld64 (uint64_t x)
		743	{
		744	int r = 0;
		745
		746	if (x >> 32) { x >>= 32; r += 32; }
		747
		748	return r + ecb_ld32 (x);
		749	}
		750	#endif
		751
		752	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		753	/* so for this version we are lazy */
		754	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		755	ecb_function_ int
		756	ecb_popcount64 (uint64_t x)
		757	{
		758	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		759	}
		760
		761	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		762	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		763	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		764	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		765	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		766	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		767	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		768	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		769
		770	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		771	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		772	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		773	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		774	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		775	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		776	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		777	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		778
		779	#if ECB_GCC_VERSION(4,3)
		780	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		781	#define ecb_bswap32(x) __builtin_bswap32 (x)
		782	#define ecb_bswap64(x) __builtin_bswap64 (x)
		783	#else
		784	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		785	ecb_function_ uint16_t
		786	ecb_bswap16 (uint16_t x)
		787	{
		788	return ecb_rotl16 (x, 8);
		789	}
		790
		791	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		792	ecb_function_ uint32_t
		793	ecb_bswap32 (uint32_t x)
		794	{
		795	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		796	}
		797
		798	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		799	ecb_function_ uint64_t
		800	ecb_bswap64 (uint64_t x)
		801	{
		802	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		803	}
		804	#endif
		805
		806	#if ECB_GCC_VERSION(4,5)
		807	#define ecb_unreachable() __builtin_unreachable ()
		808	#else
		809	/* this seems to work fine, but gcc always emits a warning for it :/ */
		810	ecb_function_ void ecb_unreachable (void) ecb_noreturn;
		811	ecb_function_ void ecb_unreachable (void) { }
		812	#endif
		813
		814	/* try to tell the compiler that some condition is definitely true */
		815	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
		816
		817	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
		818	ecb_function_ unsigned char
		819	ecb_byteorder_helper (void)
		820	{
		821	const uint32_t u = 0x11223344;
		822	return (unsigned char )&u;
		823	}
		824
		825	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
		826	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
		827	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
		828	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
		829
		830	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		831	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		832	#else
		833	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		834	#endif
		835
		836	#if ecb_cplusplus_does_not_suck
		837	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
		838	template<typename T, int N>
		839	static inline int ecb_array_length (const T (&arr)[N])
		840	{
		841	return N;
		842	}
		843	#else
		844	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		845	#endif
		846
		847	#endif
		848
		849	/* ECB.H END */
		850
		851	#define expect_false(cond) ecb_expect_false (cond)
		852	#define expect_true(cond) ecb_expect_true (cond)
		853	#define noinline ecb_noinline
		854
476	#define inline_size static inline	855	#define inline_size ecb_inline
477		856
478	#if EV_FEATURE_CODE	857	#if EV_FEATURE_CODE
479	# define inline_speed static inline	858	# define inline_speed ecb_inline
480	#else	859	#else
481	# define inline_speed static noinline	860	# define inline_speed static noinline
482	#endif	861	#endif
483		862
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	863	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	902	# include "ev_win32.c"
524	#endif	903	#endif
525		904
526	/*****************************************************************************/	905	/*****************************************************************************/
527		906
		907	/* define a suitable floor function (only used by periodics atm) */
		908
		909	#if EV_USE_FLOOR
		910	# include <math.h>
		911	# define ev_floor(v) floor (v)
		912	#else
		913
		914	#include <float.h>
		915
		916	/* a floor() replacement function, should be independent of ev_tstamp type */
		917	static ev_tstamp noinline
		918	ev_floor (ev_tstamp v)
		919	{
		920	/* the choice of shift factor is not terribly important */
		921	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		922	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		923	#else
		924	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		925	#endif
		926
		927	/* argument too large for an unsigned long? */
		928	if (expect_false (v >= shift))
		929	{
		930	ev_tstamp f;
		931
		932	if (v == v - 1.)
		933	return v; /* very large number */
		934
		935	f = shift * ev_floor (v * (1. / shift));
		936	return f + ev_floor (v - f);
		937	}
		938
		939	/* special treatment for negative args? */
		940	if (expect_false (v < 0.))
		941	{
		942	ev_tstamp f = -ev_floor (-v);
		943
		944	return f - (f == v ? 0 : 1);
		945	}
		946
		947	/* fits into an unsigned long */
		948	return (unsigned long)v;
		949	}
		950
		951	#endif
		952
		953	/*****************************************************************************/
		954
528	#ifdef __linux	955	#ifdef __linux
529	# include <sys/utsname.h>	956	# include <sys/utsname.h>
530	#endif	957	#endif
531		958
532	static unsigned int noinline	959	static unsigned int noinline ecb_cold
533	ev_linux_version (void)	960	ev_linux_version (void)
534	{	961	{
535	#ifdef __linux	962	#ifdef __linux
536	unsigned int v = 0;	963	unsigned int v = 0;
537	struct utsname buf;	964	struct utsname buf;
…		…
566	}	993	}
567		994
568	/*****************************************************************************/	995	/*****************************************************************************/
569		996
570	#if EV_AVOID_STDIO	997	#if EV_AVOID_STDIO
571	static void noinline	998	static void noinline ecb_cold
572	ev_printerr (const char *msg)	999	ev_printerr (const char *msg)
573	{	1000	{
574	write (STDERR_FILENO, msg, strlen (msg));	1001	write (STDERR_FILENO, msg, strlen (msg));
575	}	1002	}
576	#endif	1003	#endif
577		1004
578	static void (syserr_cb)(const char msg);	1005	static void (syserr_cb)(const char msg);
579		1006
580	void	1007	void ecb_cold
581	ev_set_syserr_cb (void (cb)(const char msg))	1008	ev_set_syserr_cb (void (cb)(const char msg))
582	{	1009	{
583	syserr_cb = cb;	1010	syserr_cb = cb;
584	}	1011	}
585		1012
586	static void noinline	1013	static void noinline ecb_cold
587	ev_syserr (const char *msg)	1014	ev_syserr (const char *msg)
588	{	1015	{
589	if (!msg)	1016	if (!msg)
590	msg = "(libev) system error";	1017	msg = "(libev) system error";
591		1018
…		…
624	#endif	1051	#endif
625	}	1052	}
626		1053
627	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	1054	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
628		1055
629	void	1056	void ecb_cold
630	ev_set_allocator (void (cb)(void *ptr, long size))	1057	ev_set_allocator (void (cb)(void *ptr, long size))
631	{	1058	{
632	alloc = cb;	1059	alloc = cb;
633	}	1060	}
634		1061
…		…
816	select (0, 0, 0, 0, &tv);	1243	select (0, 0, 0, 0, &tv);
817	#endif	1244	#endif
818	}	1245	}
819	}	1246	}
820		1247
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	/*****************************************************************************/	1248	/*****************************************************************************/
830		1249
831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	1250	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
832		1251
833	/* find a suitable new size for the given array, */	1252	/* find a suitable new size for the given array, */
…		…
851	}	1270	}
852		1271
853	return ncur;	1272	return ncur;
854	}	1273	}
855		1274
856	static noinline void *	1275	static void * noinline ecb_cold
857	array_realloc (int elem, void base, int cur, int cnt)	1276	array_realloc (int elem, void base, int cur, int cnt)
858	{	1277	{
859	cur = array_nextsize (elem, cur, cnt);	1278	cur = array_nextsize (elem, cur, cnt);
860	return ev_realloc (base, elem * *cur);	1279	return ev_realloc (base, elem * *cur);
861	}	1280	}
…		…
864	memset ((void )(base), 0, sizeof ((base)) * (count))	1283	memset ((void )(base), 0, sizeof ((base)) * (count))
865		1284
866	#define array_needsize(type,base,cur,cnt,init) \	1285	#define array_needsize(type,base,cur,cnt,init) \
867	if (expect_false ((cnt) > (cur))) \	1286	if (expect_false ((cnt) > (cur))) \
868	{ \	1287	{ \
869	int ocur_ = (cur); \	1288	int ecb_unused ocur_ = (cur); \
870	(base) = (type *)array_realloc \	1289	(base) = (type *)array_realloc \
871	(sizeof (type), (base), &(cur), (cnt)); \	1290	(sizeof (type), (base), &(cur), (cnt)); \
872	init ((base) + (ocur_), (cur) - ocur_); \	1291	init ((base) + (ocur_), (cur) - ocur_); \
873	}	1292	}
874		1293
…		…
980	for (i = 0; i < fdchangecnt; ++i)	1399	for (i = 0; i < fdchangecnt; ++i)
981	{	1400	{
982	int fd = fdchanges [i];	1401	int fd = fdchanges [i];
983	ANFD *anfd = anfds + fd;	1402	ANFD *anfd = anfds + fd;
984		1403
985	if (anfd->reify & EV__IOFDSET)	1404	if (anfd->reify & EV__IOFDSET && anfd->head)
986	{	1405	{
987	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);	1406	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
988		1407
989	if (handle != anfd->handle)	1408	if (handle != anfd->handle)
990	{	1409	{
…		…
1044	fdchanges [fdchangecnt - 1] = fd;	1463	fdchanges [fdchangecnt - 1] = fd;
1045	}	1464	}
1046	}	1465	}
1047		1466
1048	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1467	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1049	inline_speed void	1468	inline_speed void ecb_cold
1050	fd_kill (EV_P_ int fd)	1469	fd_kill (EV_P_ int fd)
1051	{	1470	{
1052	ev_io *w;	1471	ev_io *w;
1053		1472
1054	while ((w = (ev_io *)anfds [fd].head))	1473	while ((w = (ev_io *)anfds [fd].head))
…		…
1057	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1476	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1058	}	1477	}
1059	}	1478	}
1060		1479
1061	/* check whether the given fd is actually valid, for error recovery */	1480	/* check whether the given fd is actually valid, for error recovery */
1062	inline_size int	1481	inline_size int ecb_cold
1063	fd_valid (int fd)	1482	fd_valid (int fd)
1064	{	1483	{
1065	#ifdef _WIN32	1484	#ifdef _WIN32
1066	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1485	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1067	#else	1486	#else
1068	return fcntl (fd, F_GETFD) != -1;	1487	return fcntl (fd, F_GETFD) != -1;
1069	#endif	1488	#endif
1070	}	1489	}
1071		1490
1072	/* called on EBADF to verify fds */	1491	/* called on EBADF to verify fds */
1073	static void noinline	1492	static void noinline ecb_cold
1074	fd_ebadf (EV_P)	1493	fd_ebadf (EV_P)
1075	{	1494	{
1076	int fd;	1495	int fd;
1077		1496
1078	for (fd = 0; fd < anfdmax; ++fd)	1497	for (fd = 0; fd < anfdmax; ++fd)
…		…
1080	if (!fd_valid (fd) && errno == EBADF)	1499	if (!fd_valid (fd) && errno == EBADF)
1081	fd_kill (EV_A_ fd);	1500	fd_kill (EV_A_ fd);
1082	}	1501	}
1083		1502
1084	/* called on ENOMEM in select/poll to kill some fds and retry */	1503	/* called on ENOMEM in select/poll to kill some fds and retry */
1085	static void noinline	1504	static void noinline ecb_cold
1086	fd_enomem (EV_P)	1505	fd_enomem (EV_P)
1087	{	1506	{
1088	int fd;	1507	int fd;
1089		1508
1090	for (fd = anfdmax; fd--; )	1509	for (fd = anfdmax; fd--; )
…		…
1285		1704
1286	/*****************************************************************************/	1705	/*****************************************************************************/
1287		1706
1288	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1707	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1289		1708
1290	static void noinline	1709	static void noinline ecb_cold
1291	evpipe_init (EV_P)	1710	evpipe_init (EV_P)
1292	{	1711	{
1293	if (!ev_is_active (&pipe_w))	1712	if (!ev_is_active (&pipe_w))
1294	{	1713	{
1295	# if EV_USE_EVENTFD	1714	# if EV_USE_EVENTFD
…		…
1317	ev_io_start (EV_A_ &pipe_w);	1736	ev_io_start (EV_A_ &pipe_w);
1318	ev_unref (EV_A); /* watcher should not keep loop alive */	1737	ev_unref (EV_A); /* watcher should not keep loop alive */
1319	}	1738	}
1320	}	1739	}
1321		1740
1322	inline_size void	1741	inline_speed void
1323	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1742	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1324	{	1743	{
1325	if (!*flag)	1744	if (expect_true (*flag))
		1745	return;
		1746
		1747	*flag = 1;
		1748
		1749	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1750
		1751	pipe_write_skipped = 1;
		1752
		1753	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1754
		1755	if (pipe_write_wanted)
1326	{	1756	{
		1757	int old_errno;
		1758
		1759	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1760
1327	int old_errno = errno; /* save errno because write might clobber it */	1761	old_errno = errno; /* save errno because write will clobber it */
1328	char dummy;
1329
1330	*flag = 1;
1331		1762
1332	#if EV_USE_EVENTFD	1763	#if EV_USE_EVENTFD
1333	if (evfd >= 0)	1764	if (evfd >= 0)
1334	{	1765	{
1335	uint64_t counter = 1;	1766	uint64_t counter = 1;
1336	write (evfd, &counter, sizeof (uint64_t));	1767	write (evfd, &counter, sizeof (uint64_t));
1337	}	1768	}
1338	else	1769	else
1339	#endif	1770	#endif
		1771	{
1340	/* win32 people keep sending patches that change this write() to send() */	1772	/* win32 people keep sending patches that change this write() to send() */
1341	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1773	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1342	/* so when you think this write should be a send instead, please find out */	1774	/* so when you think this write should be a send instead, please find out */
1343	/* where your send() is from - it's definitely not the microsoft send, and */	1775	/* where your send() is from - it's definitely not the microsoft send, and */
1344	/* tell me. thank you. */	1776	/* tell me. thank you. */
1345	write (evpipe [1], &dummy, 1);	1777	write (evpipe [1], &(evpipe [1]), 1);
		1778	}
1346		1779
1347	errno = old_errno;	1780	errno = old_errno;
1348	}	1781	}
1349	}	1782	}
1350		1783
…		…
1353	static void	1786	static void
1354	pipecb (EV_P_ ev_io *iow, int revents)	1787	pipecb (EV_P_ ev_io *iow, int revents)
1355	{	1788	{
1356	int i;	1789	int i;
1357		1790
		1791	if (revents & EV_READ)
		1792	{
1358	#if EV_USE_EVENTFD	1793	#if EV_USE_EVENTFD
1359	if (evfd >= 0)	1794	if (evfd >= 0)
1360	{	1795	{
1361	uint64_t counter;	1796	uint64_t counter;
1362	read (evfd, &counter, sizeof (uint64_t));	1797	read (evfd, &counter, sizeof (uint64_t));
1363	}	1798	}
1364	else	1799	else
1365	#endif	1800	#endif
1366	{	1801	{
1367	char dummy;	1802	char dummy;
1368	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1803	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1369	read (evpipe [0], &dummy, 1);	1804	read (evpipe [0], &dummy, 1);
		1805	}
1370	}	1806	}
		1807
		1808	pipe_write_skipped = 0;
1371		1809
1372	#if EV_SIGNAL_ENABLE	1810	#if EV_SIGNAL_ENABLE
1373	if (sig_pending)	1811	if (sig_pending)
1374	{	1812	{
1375	sig_pending = 0;	1813	sig_pending = 0;
1376		1814
1377	for (i = EV_NSIG - 1; i--; )	1815	for (i = EV_NSIG - 1; i--; )
1378	if (expect_false (signals [i].pending))	1816	if (expect_false (signals [i].pending))
1379	ev_feed_signal_event (EV_A_ i + 1);	1817	ev_feed_signal_event (EV_A_ i + 1);
…		…
1404	EV_P = signals [signum - 1].loop;	1842	EV_P = signals [signum - 1].loop;
1405		1843
1406	if (!EV_A)	1844	if (!EV_A)
1407	return;	1845	return;
1408	#endif	1846	#endif
		1847
		1848	if (!ev_active (&pipe_w))
		1849	return;
1409		1850
1410	signals [signum - 1].pending = 1;	1851	signals [signum - 1].pending = 1;
1411	evpipe_write (EV_A_ &sig_pending);	1852	evpipe_write (EV_A_ &sig_pending);
1412	}	1853	}
1413		1854
…		…
1545	#endif	1986	#endif
1546	#if EV_USE_SELECT	1987	#if EV_USE_SELECT
1547	# include "ev_select.c"	1988	# include "ev_select.c"
1548	#endif	1989	#endif
1549		1990
1550	int	1991	int ecb_cold
1551	ev_version_major (void)	1992	ev_version_major (void)
1552	{	1993	{
1553	return EV_VERSION_MAJOR;	1994	return EV_VERSION_MAJOR;
1554	}	1995	}
1555		1996
1556	int	1997	int ecb_cold
1557	ev_version_minor (void)	1998	ev_version_minor (void)
1558	{	1999	{
1559	return EV_VERSION_MINOR;	2000	return EV_VERSION_MINOR;
1560	}	2001	}
1561		2002
1562	/* return true if we are running with elevated privileges and should ignore env variables */	2003	/* return true if we are running with elevated privileges and should ignore env variables */
1563	int inline_size	2004	int inline_size ecb_cold
1564	enable_secure (void)	2005	enable_secure (void)
1565	{	2006	{
1566	#ifdef _WIN32	2007	#ifdef _WIN32
1567	return 0;	2008	return 0;
1568	#else	2009	#else
1569	return getuid () != geteuid ()	2010	return getuid () != geteuid ()
1570	\|\| getgid () != getegid ();	2011	\|\| getgid () != getegid ();
1571	#endif	2012	#endif
1572	}	2013	}
1573		2014
1574	unsigned int	2015	unsigned int ecb_cold
1575	ev_supported_backends (void)	2016	ev_supported_backends (void)
1576	{	2017	{
1577	unsigned int flags = 0;	2018	unsigned int flags = 0;
1578		2019
1579	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	2020	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1583	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	2024	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1584		2025
1585	return flags;	2026	return flags;
1586	}	2027	}
1587		2028
1588	unsigned int	2029	unsigned int ecb_cold
1589	ev_recommended_backends (void)	2030	ev_recommended_backends (void)
1590	{	2031	{
1591	unsigned int flags = ev_supported_backends ();	2032	unsigned int flags = ev_supported_backends ();
1592		2033
1593	#ifndef __NetBSD__	2034	#ifndef __NetBSD__
…		…
1605	#endif	2046	#endif
1606		2047
1607	return flags;	2048	return flags;
1608	}	2049	}
1609		2050
1610	unsigned int	2051	unsigned int ecb_cold
1611	ev_embeddable_backends (void)	2052	ev_embeddable_backends (void)
1612	{	2053	{
1613	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	2054	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1614		2055
1615	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	2056	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1660	ev_userdata (EV_P)	2101	ev_userdata (EV_P)
1661	{	2102	{
1662	return userdata;	2103	return userdata;
1663	}	2104	}
1664		2105
		2106	void
1665	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	2107	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1666	{	2108	{
1667	invoke_cb = invoke_pending_cb;	2109	invoke_cb = invoke_pending_cb;
1668	}	2110	}
1669		2111
		2112	void
1670	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	2113	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1671	{	2114	{
1672	release_cb = release;	2115	release_cb = release;
1673	acquire_cb = acquire;	2116	acquire_cb = acquire;
1674	}	2117	}
1675	#endif	2118	#endif
1676		2119
1677	/* initialise a loop structure, must be zero-initialised */	2120	/* initialise a loop structure, must be zero-initialised */
1678	static void noinline	2121	static void noinline ecb_cold
1679	loop_init (EV_P_ unsigned int flags)	2122	loop_init (EV_P_ unsigned int flags)
1680	{	2123	{
1681	if (!backend)	2124	if (!backend)
1682	{	2125	{
1683	origflags = flags;	2126	origflags = flags;
…		…
1711	if (!(flags & EVFLAG_NOENV)	2154	if (!(flags & EVFLAG_NOENV)
1712	&& !enable_secure ()	2155	&& !enable_secure ()
1713	&& getenv ("LIBEV_FLAGS"))	2156	&& getenv ("LIBEV_FLAGS"))
1714	flags = atoi (getenv ("LIBEV_FLAGS"));	2157	flags = atoi (getenv ("LIBEV_FLAGS"));
1715		2158
1716	ev_rt_now = ev_time ();	2159	ev_rt_now = ev_time ();
1717	mn_now = get_clock ();	2160	mn_now = get_clock ();
1718	now_floor = mn_now;	2161	now_floor = mn_now;
1719	rtmn_diff = ev_rt_now - mn_now;	2162	rtmn_diff = ev_rt_now - mn_now;
1720	#if EV_FEATURE_API	2163	#if EV_FEATURE_API
1721	invoke_cb = ev_invoke_pending;	2164	invoke_cb = ev_invoke_pending;
1722	#endif	2165	#endif
1723		2166
1724	io_blocktime = 0.;	2167	io_blocktime = 0.;
1725	timeout_blocktime = 0.;	2168	timeout_blocktime = 0.;
1726	backend = 0;	2169	backend = 0;
1727	backend_fd = -1;	2170	backend_fd = -1;
1728	sig_pending = 0;	2171	sig_pending = 0;
1729	#if EV_ASYNC_ENABLE	2172	#if EV_ASYNC_ENABLE
1730	async_pending = 0;	2173	async_pending = 0;
1731	#endif	2174	#endif
		2175	pipe_write_skipped = 0;
		2176	pipe_write_wanted = 0;
1732	#if EV_USE_INOTIFY	2177	#if EV_USE_INOTIFY
1733	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	2178	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1734	#endif	2179	#endif
1735	#if EV_USE_SIGNALFD	2180	#if EV_USE_SIGNALFD
1736	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	2181	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1737	#endif	2182	#endif
1738		2183
1739	if (!(flags & EVBACKEND_MASK))	2184	if (!(flags & EVBACKEND_MASK))
1740	flags \|= ev_recommended_backends ();	2185	flags \|= ev_recommended_backends ();
1741		2186
…		…
1766	#endif	2211	#endif
1767	}	2212	}
1768	}	2213	}
1769		2214
1770	/* free up a loop structure */	2215	/* free up a loop structure */
1771	void	2216	void ecb_cold
1772	ev_loop_destroy (EV_P)	2217	ev_loop_destroy (EV_P)
1773	{	2218	{
1774	int i;	2219	int i;
1775		2220
1776	#if EV_MULTIPLICITY	2221	#if EV_MULTIPLICITY
…		…
1906	infy_fork (EV_A);	2351	infy_fork (EV_A);
1907	#endif	2352	#endif
1908		2353
1909	if (ev_is_active (&pipe_w))	2354	if (ev_is_active (&pipe_w))
1910	{	2355	{
1911	/* this "locks" the handlers against writing to the pipe */	2356	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1912	/* while we modify the fd vars */
1913	sig_pending = 1;
1914	#if EV_ASYNC_ENABLE
1915	async_pending = 1;
1916	#endif
1917		2357
1918	ev_ref (EV_A);	2358	ev_ref (EV_A);
1919	ev_io_stop (EV_A_ &pipe_w);	2359	ev_io_stop (EV_A_ &pipe_w);
1920		2360
1921	#if EV_USE_EVENTFD	2361	#if EV_USE_EVENTFD
…		…
1939	postfork = 0;	2379	postfork = 0;
1940	}	2380	}
1941		2381
1942	#if EV_MULTIPLICITY	2382	#if EV_MULTIPLICITY
1943		2383
1944	struct ev_loop *	2384	struct ev_loop * ecb_cold
1945	ev_loop_new (unsigned int flags)	2385	ev_loop_new (unsigned int flags)
1946	{	2386	{
1947	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2387	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1948		2388
1949	memset (EV_A, 0, sizeof (struct ev_loop));	2389	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1957	}	2397	}
1958		2398
1959	#endif /* multiplicity */	2399	#endif /* multiplicity */
1960		2400
1961	#if EV_VERIFY	2401	#if EV_VERIFY
1962	static void noinline	2402	static void noinline ecb_cold
1963	verify_watcher (EV_P_ W w)	2403	verify_watcher (EV_P_ W w)
1964	{	2404	{
1965	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2405	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1966		2406
1967	if (w->pending)	2407	if (w->pending)
1968	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2408	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1969	}	2409	}
1970		2410
1971	static void noinline	2411	static void noinline ecb_cold
1972	verify_heap (EV_P_ ANHE *heap, int N)	2412	verify_heap (EV_P_ ANHE *heap, int N)
1973	{	2413	{
1974	int i;	2414	int i;
1975		2415
1976	for (i = HEAP0; i < N + HEAP0; ++i)	2416	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1981		2421
1982	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2422	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1983	}	2423	}
1984	}	2424	}
1985		2425
1986	static void noinline	2426	static void noinline ecb_cold
1987	array_verify (EV_P_ W *ws, int cnt)	2427	array_verify (EV_P_ W *ws, int cnt)
1988	{	2428	{
1989	while (cnt--)	2429	while (cnt--)
1990	{	2430	{
1991	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2431	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1993	}	2433	}
1994	}	2434	}
1995	#endif	2435	#endif
1996		2436
1997	#if EV_FEATURE_API	2437	#if EV_FEATURE_API
1998	void	2438	void ecb_cold
1999	ev_verify (EV_P)	2439	ev_verify (EV_P)
2000	{	2440	{
2001	#if EV_VERIFY	2441	#if EV_VERIFY
2002	int i;	2442	int i;
2003	WL w;	2443	WL w;
…		…
2069	#endif	2509	#endif
2070	}	2510	}
2071	#endif	2511	#endif
2072		2512
2073	#if EV_MULTIPLICITY	2513	#if EV_MULTIPLICITY
2074	struct ev_loop *	2514	struct ev_loop * ecb_cold
2075	#else	2515	#else
2076	int	2516	int
2077	#endif	2517	#endif
2078	ev_default_loop (unsigned int flags)	2518	ev_default_loop (unsigned int flags)
2079	{	2519	{
…		…
2208	}	2648	}
2209	}	2649	}
2210		2650
2211	#if EV_PERIODIC_ENABLE	2651	#if EV_PERIODIC_ENABLE
2212		2652
2213	inline_speed void	2653	static void noinline
2214	periodic_recalc (EV_P_ ev_periodic *w)	2654	periodic_recalc (EV_P_ ev_periodic *w)
2215	{	2655	{
2216	/* TODO: use slow but potentially more correct incremental algo, */	2656	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2217	/* also do not rely on ceil */	2657	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2218	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2658
		2659	/* the above almost always errs on the low side */
		2660	while (at <= ev_rt_now)
		2661	{
		2662	ev_tstamp nat = at + w->interval;
		2663
		2664	/* when resolution fails us, we use ev_rt_now */
		2665	if (expect_false (nat == at))
		2666	{
		2667	at = ev_rt_now;
		2668	break;
		2669	}
		2670
		2671	at = nat;
		2672	}
		2673
		2674	ev_at (w) = at;
2219	}	2675	}
2220		2676
2221	/* make periodics pending */	2677	/* make periodics pending */
2222	inline_size void	2678	inline_size void
2223	periodics_reify (EV_P)	2679	periodics_reify (EV_P)
…		…
2245	downheap (periodics, periodiccnt, HEAP0);	2701	downheap (periodics, periodiccnt, HEAP0);
2246	}	2702	}
2247	else if (w->interval)	2703	else if (w->interval)
2248	{	2704	{
2249	periodic_recalc (EV_A_ w);	2705	periodic_recalc (EV_A_ w);
2250
2251	/* if next trigger time is not sufficiently in the future, put it there */
2252	/* this might happen because of floating point inexactness */
2253	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2254	{
2255	ev_at (w) += w->interval;
2256
2257	/* if interval is unreasonably low we might still have a time in the past */
2258	/* so correct this. this will make the periodic very inexact, but the user */
2259	/* has effectively asked to get triggered more often than possible */
2260	if (ev_at (w) < ev_rt_now)
2261	ev_at (w) = ev_rt_now;
2262	}
2263
2264	ANHE_at_cache (periodics [HEAP0]);	2706	ANHE_at_cache (periodics [HEAP0]);
2265	downheap (periodics, periodiccnt, HEAP0);	2707	downheap (periodics, periodiccnt, HEAP0);
2266	}	2708	}
2267	else	2709	else
2268	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2710	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2276	}	2718	}
2277	}	2719	}
2278		2720
2279	/* simply recalculate all periodics */	2721	/* simply recalculate all periodics */
2280	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2722	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2281	static void noinline	2723	static void noinline ecb_cold
2282	periodics_reschedule (EV_P)	2724	periodics_reschedule (EV_P)
2283	{	2725	{
2284	int i;	2726	int i;
2285		2727
2286	/* adjust periodics after time jump */	2728	/* adjust periodics after time jump */
…		…
2299	reheap (periodics, periodiccnt);	2741	reheap (periodics, periodiccnt);
2300	}	2742	}
2301	#endif	2743	#endif
2302		2744
2303	/* adjust all timers by a given offset */	2745	/* adjust all timers by a given offset */
2304	static void noinline	2746	static void noinline ecb_cold
2305	timers_reschedule (EV_P_ ev_tstamp adjust)	2747	timers_reschedule (EV_P_ ev_tstamp adjust)
2306	{	2748	{
2307	int i;	2749	int i;
2308		2750
2309	for (i = 0; i < timercnt; ++i)	2751	for (i = 0; i < timercnt; ++i)
…		…
2346	* doesn't hurt either as we only do this on time-jumps or	2788	* doesn't hurt either as we only do this on time-jumps or
2347	* in the unlikely event of having been preempted here.	2789	* in the unlikely event of having been preempted here.
2348	*/	2790	*/
2349	for (i = 4; --i; )	2791	for (i = 4; --i; )
2350	{	2792	{
		2793	ev_tstamp diff;
2351	rtmn_diff = ev_rt_now - mn_now;	2794	rtmn_diff = ev_rt_now - mn_now;
2352		2795
		2796	diff = odiff - rtmn_diff;
		2797
2353	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2798	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2354	return; /* all is well */	2799	return; /* all is well */
2355		2800
2356	ev_rt_now = ev_time ();	2801	ev_rt_now = ev_time ();
2357	mn_now = get_clock ();	2802	mn_now = get_clock ();
2358	now_floor = mn_now;	2803	now_floor = mn_now;
…		…
2448	ev_tstamp prev_mn_now = mn_now;	2893	ev_tstamp prev_mn_now = mn_now;
2449		2894
2450	/* update time to cancel out callback processing overhead */	2895	/* update time to cancel out callback processing overhead */
2451	time_update (EV_A_ 1e100);	2896	time_update (EV_A_ 1e100);
2452		2897
		2898	/* from now on, we want a pipe-wake-up */
		2899	pipe_write_wanted = 1;
		2900
		2901	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		2902
2453	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2903	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2454	{	2904	{
2455	waittime = MAX_BLOCKTIME;	2905	waittime = MAX_BLOCKTIME;
2456		2906
2457	if (timercnt)	2907	if (timercnt)
2458	{	2908	{
2459	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2909	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2460	if (waittime > to) waittime = to;	2910	if (waittime > to) waittime = to;
2461	}	2911	}
2462		2912
2463	#if EV_PERIODIC_ENABLE	2913	#if EV_PERIODIC_ENABLE
2464	if (periodiccnt)	2914	if (periodiccnt)
2465	{	2915	{
2466	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2916	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2467	if (waittime > to) waittime = to;	2917	if (waittime > to) waittime = to;
2468	}	2918	}
2469	#endif	2919	#endif
2470		2920
2471	/* don't let timeouts decrease the waittime below timeout_blocktime */	2921	/* don't let timeouts decrease the waittime below timeout_blocktime */
2472	if (expect_false (waittime < timeout_blocktime))	2922	if (expect_false (waittime < timeout_blocktime))
2473	waittime = timeout_blocktime;	2923	waittime = timeout_blocktime;
		2924
		2925	/* at this point, we NEED to wait, so we have to ensure */
		2926	/* to pass a minimum nonzero value to the backend */
		2927	if (expect_false (waittime < backend_mintime))
		2928	waittime = backend_mintime;
2474		2929
2475	/* extra check because io_blocktime is commonly 0 */	2930	/* extra check because io_blocktime is commonly 0 */
2476	if (expect_false (io_blocktime))	2931	if (expect_false (io_blocktime))
2477	{	2932	{
2478	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2933	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2479		2934
2480	if (sleeptime > waittime - backend_fudge)	2935	if (sleeptime > waittime - backend_mintime)
2481	sleeptime = waittime - backend_fudge;	2936	sleeptime = waittime - backend_mintime;
2482		2937
2483	if (expect_true (sleeptime > 0.))	2938	if (expect_true (sleeptime > 0.))
2484	{	2939	{
2485	ev_sleep (sleeptime);	2940	ev_sleep (sleeptime);
2486	waittime -= sleeptime;	2941	waittime -= sleeptime;
…		…
2492	++loop_count;	2947	++loop_count;
2493	#endif	2948	#endif
2494	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2949	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2495	backend_poll (EV_A_ waittime);	2950	backend_poll (EV_A_ waittime);
2496	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2951	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2952
		2953	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2954
		2955	if (pipe_write_skipped)
		2956	{
		2957	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2958	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2959	}
		2960
2497		2961
2498	/* update ev_rt_now, do magic */	2962	/* update ev_rt_now, do magic */
2499	time_update (EV_A_ waittime + sleeptime);	2963	time_update (EV_A_ waittime + sleeptime);
2500	}	2964	}
2501		2965
…		…
3078	if (!pend \|\| pend == path)	3542	if (!pend \|\| pend == path)
3079	break;	3543	break;
3080		3544
3081	*pend = 0;	3545	*pend = 0;
3082	w->wd = inotify_add_watch (fs_fd, path, mask);	3546	w->wd = inotify_add_watch (fs_fd, path, mask);
3083	}	3547	}
3084	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3548	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3085	}	3549	}
3086	}	3550	}
3087		3551
3088	if (w->wd >= 0)	3552	if (w->wd >= 0)
…		…
3155	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3619	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3156	ofs += sizeof (struct inotify_event) + ev->len;	3620	ofs += sizeof (struct inotify_event) + ev->len;
3157	}	3621	}
3158	}	3622	}
3159		3623
3160	inline_size void	3624	inline_size void ecb_cold
3161	ev_check_2625 (EV_P)	3625	ev_check_2625 (EV_P)
3162	{	3626	{
3163	/* kernels < 2.6.25 are borked	3627	/* kernels < 2.6.25 are borked
3164	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3628	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3165	*/	3629	*/
…		…
3790	}	4254	}
3791		4255
3792	/*****************************************************************************/	4256	/*****************************************************************************/
3793		4257
3794	#if EV_WALK_ENABLE	4258	#if EV_WALK_ENABLE
3795	void	4259	void ecb_cold
3796	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	4260	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3797	{	4261	{
3798	int i, j;	4262	int i, j;
3799	ev_watcher_list wl, wn;	4263	ev_watcher_list wl, wn;
3800		4264
…		…
3844	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));	4308	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3845	#endif	4309	#endif
3846		4310
3847	#if EV_IDLE_ENABLE	4311	#if EV_IDLE_ENABLE
3848	if (types & EV_IDLE)	4312	if (types & EV_IDLE)
3849	for (j = NUMPRI; i--; )	4313	for (j = NUMPRI; j--; )
3850	for (i = idlecnt [j]; i--; )	4314	for (i = idlecnt [j]; i--; )
3851	cb (EV_A_ EV_IDLE, idles [j][i]);	4315	cb (EV_A_ EV_IDLE, idles [j][i]);
3852	#endif	4316	#endif
3853		4317
3854	#if EV_FORK_ENABLE	4318	#if EV_FORK_ENABLE

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Comparing libev/ev.c (file contents): Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs. Revision 1.391 by root, Thu Aug 4 13:57:16 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC vs.
Revision 1.391 by root, Thu Aug 4 13:57:16 2011 UTC