[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 1.387 by root, Wed Jul 20 01:04:43 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
463	#if __GNUC__ >= 4	469	/* the following are taken from libecb */
464	# define expect(expr,value) __builtin_expect ((expr),(value))	470	/* ecb.h start */
465	# define noinline __attribute__ ((noinline))	471
		472	/* many compilers define _GNUC_ to some versions but then only implement
		473	* what their idiot authors think are the "more important" extensions,
		474	* causing enourmous grief in return for some better fake benchmark numbers.
		475	* or so.
		476	* we try to detect these and simply assume they are not gcc - if they have
		477	* an issue with that they should have done it right in the first place.
		478	*/
		479	#ifndef ECB_GCC_VERSION
		480	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)
		481	#define ECB_GCC_VERSION(major,minor) 0
		482	#else
		483	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		484	#endif
		485	#endif
		486
		487	#if __cplusplus
		488	#define ecb_inline static inline
		489	#elif ECB_GCC_VERSION(2,5)
		490	#define ecb_inline static __inline__
		491	#elif ECB_C99
		492	#define ecb_inline static inline
466	#else	493	#else
467	# define expect(expr,value) (expr)	494	#define ecb_inline static
468	# define noinline
469	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470	# define inline
471	# endif	495	#endif
		496
		497	#ifndef ECB_MEMORY_FENCE
		498	#if ECB_GCC_VERSION(2,5)
		499	#if __x86
		500	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		501	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		502	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		503	#elif __amd64
		504	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		505	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		506	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
		507	#endif
472	#endif	508	#endif
		509	#endif
473		510
		511	#ifndef ECB_MEMORY_FENCE
		512	#if ECB_GCC_VERSION(4,4)
		513	#define ECB_MEMORY_FENCE __sync_synchronize ()
		514	#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
		515	#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
		516	#elif defined(_WIN32) && defined(MemoryBarrier)
		517	#define ECB_MEMORY_FENCE MemoryBarrier ()
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#endif
		521	#endif
		522
		523	#ifndef ECB_MEMORY_FENCE
		524	#include <pthread.h>
		525
		526	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		527	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		528	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		529	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		530	#endif
		531
		532	#if ECB_GCC_VERSION(3,1)
		533	#define ecb_attribute(attrlist) __attribute__(attrlist)
		534	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		535	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		536	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		537	#else
		538	#define ecb_attribute(attrlist)
		539	#define ecb_is_constant(expr) 0
		540	#define ecb_expect(expr,value) (expr)
		541	#define ecb_prefetch(addr,rw,locality)
		542	#endif
		543
		544	#define ecb_noinline ecb_attribute ((__noinline__))
		545	#define ecb_noreturn ecb_attribute ((__noreturn__))
		546	#define ecb_unused ecb_attribute ((__unused__))
		547	#define ecb_const ecb_attribute ((__const__))
		548	#define ecb_pure ecb_attribute ((__pure__))
		549
		550	#if ECB_GCC_VERSION(4,3)
		551	#define ecb_artificial ecb_attribute ((__artificial__))
		552	#define ecb_hot ecb_attribute ((__hot__))
		553	#define ecb_cold ecb_attribute ((__cold__))
		554	#else
		555	#define ecb_artificial
		556	#define ecb_hot
		557	#define ecb_cold
		558	#endif
		559
		560	/* put around conditional expressions if you are very sure that the */
		561	/* expression is mostly true or mostly false. note that these return */
		562	/* booleans, not the expression. */
474	#define expect_false(expr) expect ((expr) != 0, 0)	563	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475	#define expect_true(expr) expect ((expr) != 0, 1)	564	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		565	/* ecb.h end */
		566
		567	#define expect_false(cond) ecb_expect_false (cond)
		568	#define expect_true(cond) ecb_expect_true (cond)
		569	#define noinline ecb_noinline
		570
476	#define inline_size static inline	571	#define inline_size ecb_inline
477		572
478	#if EV_FEATURE_CODE	573	#if EV_FEATURE_CODE
479	# define inline_speed static inline	574	# define inline_speed ecb_inline
480	#else	575	#else
481	# define inline_speed static noinline	576	# define inline_speed static noinline
482	#endif	577	#endif
483		578
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	579	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	618	# include "ev_win32.c"
524	#endif	619	#endif
525		620
526	/*****************************************************************************/	621	/*****************************************************************************/
527		622
		623	/* define a suitable floor function (only used by periodics atm) */
		624
		625	#if EV_USE_FLOOR
		626	# include <math.h>
		627	# define ev_floor(v) floor (v)
		628	#else
		629
		630	#include <float.h>
		631
		632	/* a floor() replacement function, should be independent of ev_tstamp type */
		633	static ev_tstamp noinline
		634	ev_floor (ev_tstamp v)
		635	{
		636	/* the choice of shift factor is not terribly important */
		637	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		638	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		639	#else
		640	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		641	#endif
		642
		643	/* argument too large for an unsigned long? */
		644	if (expect_false (v >= shift))
		645	{
		646	ev_tstamp f;
		647
		648	if (v == v - 1.)
		649	return v; /* very large number */
		650
		651	f = shift * ev_floor (v * (1. / shift));
		652	return f + ev_floor (v - f);
		653	}
		654
		655	/* special treatment for negative args? */
		656	if (expect_false (v < 0.))
		657	{
		658	ev_tstamp f = -ev_floor (-v);
		659
		660	return f - (f == v ? 0 : 1);
		661	}
		662
		663	/* fits into an unsigned long */
		664	return (unsigned long)v;
		665	}
		666
		667	#endif
		668
		669	/*****************************************************************************/
		670
528	#ifdef __linux	671	#ifdef __linux
529	# include <sys/utsname.h>	672	# include <sys/utsname.h>
530	#endif	673	#endif
531		674
532	static unsigned int noinline	675	static unsigned int noinline ecb_cold
533	ev_linux_version (void)	676	ev_linux_version (void)
534	{	677	{
535	#ifdef __linux	678	#ifdef __linux
536	unsigned int v = 0;	679	unsigned int v = 0;
537	struct utsname buf;	680	struct utsname buf;
…		…
566	}	709	}
567		710
568	/*****************************************************************************/	711	/*****************************************************************************/
569		712
570	#if EV_AVOID_STDIO	713	#if EV_AVOID_STDIO
571	static void noinline	714	static void noinline ecb_cold
572	ev_printerr (const char *msg)	715	ev_printerr (const char *msg)
573	{	716	{
574	write (STDERR_FILENO, msg, strlen (msg));	717	write (STDERR_FILENO, msg, strlen (msg));
575	}	718	}
576	#endif	719	#endif
577		720
578	static void (syserr_cb)(const char msg);	721	static void (syserr_cb)(const char msg);
579		722
580	void	723	void ecb_cold
581	ev_set_syserr_cb (void (cb)(const char msg))	724	ev_set_syserr_cb (void (cb)(const char msg))
582	{	725	{
583	syserr_cb = cb;	726	syserr_cb = cb;
584	}	727	}
585		728
586	static void noinline	729	static void noinline ecb_cold
587	ev_syserr (const char *msg)	730	ev_syserr (const char *msg)
588	{	731	{
589	if (!msg)	732	if (!msg)
590	msg = "(libev) system error";	733	msg = "(libev) system error";
591		734
…		…
624	#endif	767	#endif
625	}	768	}
626		769
627	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	770	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
628		771
629	void	772	void ecb_cold
630	ev_set_allocator (void (cb)(void *ptr, long size))	773	ev_set_allocator (void (cb)(void *ptr, long size))
631	{	774	{
632	alloc = cb;	775	alloc = cb;
633	}	776	}
634		777
…		…
816	select (0, 0, 0, 0, &tv);	959	select (0, 0, 0, 0, &tv);
817	#endif	960	#endif
818	}	961	}
819	}	962	}
820		963
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	/*****************************************************************************/	964	/*****************************************************************************/
830		965
831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	966	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
832		967
833	/* find a suitable new size for the given array, */	968	/* find a suitable new size for the given array, */
…		…
851	}	986	}
852		987
853	return ncur;	988	return ncur;
854	}	989	}
855		990
856	static noinline void *	991	static void * noinline ecb_cold
857	array_realloc (int elem, void base, int cur, int cnt)	992	array_realloc (int elem, void base, int cur, int cnt)
858	{	993	{
859	cur = array_nextsize (elem, cur, cnt);	994	cur = array_nextsize (elem, cur, cnt);
860	return ev_realloc (base, elem * *cur);	995	return ev_realloc (base, elem * *cur);
861	}	996	}
…		…
864	memset ((void )(base), 0, sizeof ((base)) * (count))	999	memset ((void )(base), 0, sizeof ((base)) * (count))
865		1000
866	#define array_needsize(type,base,cur,cnt,init) \	1001	#define array_needsize(type,base,cur,cnt,init) \
867	if (expect_false ((cnt) > (cur))) \	1002	if (expect_false ((cnt) > (cur))) \
868	{ \	1003	{ \
869	int ocur_ = (cur); \	1004	int ecb_unused ocur_ = (cur); \
870	(base) = (type *)array_realloc \	1005	(base) = (type *)array_realloc \
871	(sizeof (type), (base), &(cur), (cnt)); \	1006	(sizeof (type), (base), &(cur), (cnt)); \
872	init ((base) + (ocur_), (cur) - ocur_); \	1007	init ((base) + (ocur_), (cur) - ocur_); \
873	}	1008	}
874		1009
…		…
974	inline_size void	1109	inline_size void
975	fd_reify (EV_P)	1110	fd_reify (EV_P)
976	{	1111	{
977	int i;	1112	int i;
978		1113
		1114	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1115	for (i = 0; i < fdchangecnt; ++i)
		1116	{
		1117	int fd = fdchanges [i];
		1118	ANFD *anfd = anfds + fd;
		1119
		1120	if (anfd->reify & EV__IOFDSET && anfd->head)
		1121	{
		1122	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1123
		1124	if (handle != anfd->handle)
		1125	{
		1126	unsigned long arg;
		1127
		1128	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1129
		1130	/* handle changed, but fd didn't - we need to do it in two steps */
		1131	backend_modify (EV_A_ fd, anfd->events, 0);
		1132	anfd->events = 0;
		1133	anfd->handle = handle;
		1134	}
		1135	}
		1136	}
		1137	#endif
		1138
979	for (i = 0; i < fdchangecnt; ++i)	1139	for (i = 0; i < fdchangecnt; ++i)
980	{	1140	{
981	int fd = fdchanges [i];	1141	int fd = fdchanges [i];
982	ANFD *anfd = anfds + fd;	1142	ANFD *anfd = anfds + fd;
983	ev_io *w;	1143	ev_io *w;
…		…
985	unsigned char o_events = anfd->events;	1145	unsigned char o_events = anfd->events;
986	unsigned char o_reify = anfd->reify;	1146	unsigned char o_reify = anfd->reify;
987		1147
988	anfd->reify = 0;	1148	anfd->reify = 0;
989		1149
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 /	1150	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
1001	{	1151	{
1002	anfd->events = 0;	1152	anfd->events = 0;
1003		1153
1004	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1154	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1029	fdchanges [fdchangecnt - 1] = fd;	1179	fdchanges [fdchangecnt - 1] = fd;
1030	}	1180	}
1031	}	1181	}
1032		1182
1033	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1183	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034	inline_speed void	1184	inline_speed void ecb_cold
1035	fd_kill (EV_P_ int fd)	1185	fd_kill (EV_P_ int fd)
1036	{	1186	{
1037	ev_io *w;	1187	ev_io *w;
1038		1188
1039	while ((w = (ev_io *)anfds [fd].head))	1189	while ((w = (ev_io *)anfds [fd].head))
…		…
1042	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1192	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1043	}	1193	}
1044	}	1194	}
1045		1195
1046	/* check whether the given fd is actually valid, for error recovery */	1196	/* check whether the given fd is actually valid, for error recovery */
1047	inline_size int	1197	inline_size int ecb_cold
1048	fd_valid (int fd)	1198	fd_valid (int fd)
1049	{	1199	{
1050	#ifdef _WIN32	1200	#ifdef _WIN32
1051	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1201	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052	#else	1202	#else
1053	return fcntl (fd, F_GETFD) != -1;	1203	return fcntl (fd, F_GETFD) != -1;
1054	#endif	1204	#endif
1055	}	1205	}
1056		1206
1057	/* called on EBADF to verify fds */	1207	/* called on EBADF to verify fds */
1058	static void noinline	1208	static void noinline ecb_cold
1059	fd_ebadf (EV_P)	1209	fd_ebadf (EV_P)
1060	{	1210	{
1061	int fd;	1211	int fd;
1062		1212
1063	for (fd = 0; fd < anfdmax; ++fd)	1213	for (fd = 0; fd < anfdmax; ++fd)
…		…
1065	if (!fd_valid (fd) && errno == EBADF)	1215	if (!fd_valid (fd) && errno == EBADF)
1066	fd_kill (EV_A_ fd);	1216	fd_kill (EV_A_ fd);
1067	}	1217	}
1068		1218
1069	/* called on ENOMEM in select/poll to kill some fds and retry */	1219	/* called on ENOMEM in select/poll to kill some fds and retry */
1070	static void noinline	1220	static void noinline ecb_cold
1071	fd_enomem (EV_P)	1221	fd_enomem (EV_P)
1072	{	1222	{
1073	int fd;	1223	int fd;
1074		1224
1075	for (fd = anfdmax; fd--; )	1225	for (fd = anfdmax; fd--; )
…		…
1270		1420
1271	/*****************************************************************************/	1421	/*****************************************************************************/
1272		1422
1273	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1423	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1274		1424
1275	static void noinline	1425	static void noinline ecb_cold
1276	evpipe_init (EV_P)	1426	evpipe_init (EV_P)
1277	{	1427	{
1278	if (!ev_is_active (&pipe_w))	1428	if (!ev_is_active (&pipe_w))
1279	{	1429	{
1280	# if EV_USE_EVENTFD	1430	# if EV_USE_EVENTFD
…		…
1302	ev_io_start (EV_A_ &pipe_w);	1452	ev_io_start (EV_A_ &pipe_w);
1303	ev_unref (EV_A); /* watcher should not keep loop alive */	1453	ev_unref (EV_A); /* watcher should not keep loop alive */
1304	}	1454	}
1305	}	1455	}
1306		1456
1307	inline_size void	1457	inline_speed void
1308	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1458	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309	{	1459	{
1310	if (!*flag)	1460	if (expect_true (*flag))
		1461	return;
		1462
		1463	*flag = 1;
		1464
		1465	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1466
		1467	pipe_write_skipped = 1;
		1468
		1469	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1470
		1471	if (pipe_write_wanted)
1311	{	1472	{
		1473	int old_errno;
		1474
		1475	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1476
1312	int old_errno = errno; /* save errno because write might clobber it */	1477	old_errno = errno; /* save errno because write will clobber it */
1313	char dummy;
1314
1315	*flag = 1;
1316		1478
1317	#if EV_USE_EVENTFD	1479	#if EV_USE_EVENTFD
1318	if (evfd >= 0)	1480	if (evfd >= 0)
1319	{	1481	{
1320	uint64_t counter = 1;	1482	uint64_t counter = 1;
1321	write (evfd, &counter, sizeof (uint64_t));	1483	write (evfd, &counter, sizeof (uint64_t));
1322	}	1484	}
1323	else	1485	else
1324	#endif	1486	#endif
		1487	{
1325	/* win32 people keep sending patches that change this write() to send() */	1488	/* 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 */	1489	/* 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 */	1490	/* 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 */	1491	/* where your send() is from - it's definitely not the microsoft send, and */
1329	/* tell me. thank you. */	1492	/* tell me. thank you. */
1330	write (evpipe [1], &dummy, 1);	1493	write (evpipe [1], &(evpipe [1]), 1);
		1494	}
1331		1495
1332	errno = old_errno;	1496	errno = old_errno;
1333	}	1497	}
1334	}	1498	}
1335		1499
…		…
1338	static void	1502	static void
1339	pipecb (EV_P_ ev_io *iow, int revents)	1503	pipecb (EV_P_ ev_io *iow, int revents)
1340	{	1504	{
1341	int i;	1505	int i;
1342		1506
		1507	if (revents & EV_READ)
		1508	{
1343	#if EV_USE_EVENTFD	1509	#if EV_USE_EVENTFD
1344	if (evfd >= 0)	1510	if (evfd >= 0)
1345	{	1511	{
1346	uint64_t counter;	1512	uint64_t counter;
1347	read (evfd, &counter, sizeof (uint64_t));	1513	read (evfd, &counter, sizeof (uint64_t));
1348	}	1514	}
1349	else	1515	else
1350	#endif	1516	#endif
1351	{	1517	{
1352	char dummy;	1518	char dummy;
1353	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1519	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1354	read (evpipe [0], &dummy, 1);	1520	read (evpipe [0], &dummy, 1);
		1521	}
1355	}	1522	}
		1523
		1524	pipe_write_skipped = 0;
1356		1525
1357	#if EV_SIGNAL_ENABLE	1526	#if EV_SIGNAL_ENABLE
1358	if (sig_pending)	1527	if (sig_pending)
1359	{	1528	{
1360	sig_pending = 0;	1529	sig_pending = 0;
1361		1530
1362	for (i = EV_NSIG - 1; i--; )	1531	for (i = EV_NSIG - 1; i--; )
1363	if (expect_false (signals [i].pending))	1532	if (expect_false (signals [i].pending))
1364	ev_feed_signal_event (EV_A_ i + 1);	1533	ev_feed_signal_event (EV_A_ i + 1);
…		…
1389	EV_P = signals [signum - 1].loop;	1558	EV_P = signals [signum - 1].loop;
1390		1559
1391	if (!EV_A)	1560	if (!EV_A)
1392	return;	1561	return;
1393	#endif	1562	#endif
		1563
		1564	if (!ev_active (&pipe_w))
		1565	return;
1394		1566
1395	signals [signum - 1].pending = 1;	1567	signals [signum - 1].pending = 1;
1396	evpipe_write (EV_A_ &sig_pending);	1568	evpipe_write (EV_A_ &sig_pending);
1397	}	1569	}
1398		1570
…		…
1530	#endif	1702	#endif
1531	#if EV_USE_SELECT	1703	#if EV_USE_SELECT
1532	# include "ev_select.c"	1704	# include "ev_select.c"
1533	#endif	1705	#endif
1534		1706
1535	int	1707	int ecb_cold
1536	ev_version_major (void)	1708	ev_version_major (void)
1537	{	1709	{
1538	return EV_VERSION_MAJOR;	1710	return EV_VERSION_MAJOR;
1539	}	1711	}
1540		1712
1541	int	1713	int ecb_cold
1542	ev_version_minor (void)	1714	ev_version_minor (void)
1543	{	1715	{
1544	return EV_VERSION_MINOR;	1716	return EV_VERSION_MINOR;
1545	}	1717	}
1546		1718
1547	/* return true if we are running with elevated privileges and should ignore env variables */	1719	/* return true if we are running with elevated privileges and should ignore env variables */
1548	int inline_size	1720	int inline_size ecb_cold
1549	enable_secure (void)	1721	enable_secure (void)
1550	{	1722	{
1551	#ifdef _WIN32	1723	#ifdef _WIN32
1552	return 0;	1724	return 0;
1553	#else	1725	#else
1554	return getuid () != geteuid ()	1726	return getuid () != geteuid ()
1555	\|\| getgid () != getegid ();	1727	\|\| getgid () != getegid ();
1556	#endif	1728	#endif
1557	}	1729	}
1558		1730
1559	unsigned int	1731	unsigned int ecb_cold
1560	ev_supported_backends (void)	1732	ev_supported_backends (void)
1561	{	1733	{
1562	unsigned int flags = 0;	1734	unsigned int flags = 0;
1563		1735
1564	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1736	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1568	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1740	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1569		1741
1570	return flags;	1742	return flags;
1571	}	1743	}
1572		1744
1573	unsigned int	1745	unsigned int ecb_cold
1574	ev_recommended_backends (void)	1746	ev_recommended_backends (void)
1575	{	1747	{
1576	unsigned int flags = ev_supported_backends ();	1748	unsigned int flags = ev_supported_backends ();
1577		1749
1578	#ifndef __NetBSD__	1750	#ifndef __NetBSD__
…		…
1590	#endif	1762	#endif
1591		1763
1592	return flags;	1764	return flags;
1593	}	1765	}
1594		1766
1595	unsigned int	1767	unsigned int ecb_cold
1596	ev_embeddable_backends (void)	1768	ev_embeddable_backends (void)
1597	{	1769	{
1598	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1770	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1599		1771
1600	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1772	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1645	ev_userdata (EV_P)	1817	ev_userdata (EV_P)
1646	{	1818	{
1647	return userdata;	1819	return userdata;
1648	}	1820	}
1649		1821
		1822	void
1650	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1823	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1651	{	1824	{
1652	invoke_cb = invoke_pending_cb;	1825	invoke_cb = invoke_pending_cb;
1653	}	1826	}
1654		1827
		1828	void
1655	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1829	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1656	{	1830	{
1657	release_cb = release;	1831	release_cb = release;
1658	acquire_cb = acquire;	1832	acquire_cb = acquire;
1659	}	1833	}
1660	#endif	1834	#endif
1661		1835
1662	/* initialise a loop structure, must be zero-initialised */	1836	/* initialise a loop structure, must be zero-initialised */
1663	static void noinline	1837	static void noinline ecb_cold
1664	loop_init (EV_P_ unsigned int flags)	1838	loop_init (EV_P_ unsigned int flags)
1665	{	1839	{
1666	if (!backend)	1840	if (!backend)
1667	{	1841	{
1668	origflags = flags;	1842	origflags = flags;
…		…
1696	if (!(flags & EVFLAG_NOENV)	1870	if (!(flags & EVFLAG_NOENV)
1697	&& !enable_secure ()	1871	&& !enable_secure ()
1698	&& getenv ("LIBEV_FLAGS"))	1872	&& getenv ("LIBEV_FLAGS"))
1699	flags = atoi (getenv ("LIBEV_FLAGS"));	1873	flags = atoi (getenv ("LIBEV_FLAGS"));
1700		1874
1701	ev_rt_now = ev_time ();	1875	ev_rt_now = ev_time ();
1702	mn_now = get_clock ();	1876	mn_now = get_clock ();
1703	now_floor = mn_now;	1877	now_floor = mn_now;
1704	rtmn_diff = ev_rt_now - mn_now;	1878	rtmn_diff = ev_rt_now - mn_now;
1705	#if EV_FEATURE_API	1879	#if EV_FEATURE_API
1706	invoke_cb = ev_invoke_pending;	1880	invoke_cb = ev_invoke_pending;
1707	#endif	1881	#endif
1708		1882
1709	io_blocktime = 0.;	1883	io_blocktime = 0.;
1710	timeout_blocktime = 0.;	1884	timeout_blocktime = 0.;
1711	backend = 0;	1885	backend = 0;
1712	backend_fd = -1;	1886	backend_fd = -1;
1713	sig_pending = 0;	1887	sig_pending = 0;
1714	#if EV_ASYNC_ENABLE	1888	#if EV_ASYNC_ENABLE
1715	async_pending = 0;	1889	async_pending = 0;
1716	#endif	1890	#endif
		1891	pipe_write_skipped = 0;
		1892	pipe_write_wanted = 0;
1717	#if EV_USE_INOTIFY	1893	#if EV_USE_INOTIFY
1718	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1894	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719	#endif	1895	#endif
1720	#if EV_USE_SIGNALFD	1896	#if EV_USE_SIGNALFD
1721	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1897	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722	#endif	1898	#endif
1723		1899
1724	if (!(flags & EVBACKEND_MASK))	1900	if (!(flags & EVBACKEND_MASK))
1725	flags \|= ev_recommended_backends ();	1901	flags \|= ev_recommended_backends ();
1726		1902
…		…
1751	#endif	1927	#endif
1752	}	1928	}
1753	}	1929	}
1754		1930
1755	/* free up a loop structure */	1931	/* free up a loop structure */
1756	void	1932	void ecb_cold
1757	ev_loop_destroy (EV_P)	1933	ev_loop_destroy (EV_P)
1758	{	1934	{
1759	int i;	1935	int i;
1760		1936
1761	#if EV_MULTIPLICITY	1937	#if EV_MULTIPLICITY
…		…
1891	infy_fork (EV_A);	2067	infy_fork (EV_A);
1892	#endif	2068	#endif
1893		2069
1894	if (ev_is_active (&pipe_w))	2070	if (ev_is_active (&pipe_w))
1895	{	2071	{
1896	/* this "locks" the handlers against writing to the pipe */	2072	/* 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		2073
1903	ev_ref (EV_A);	2074	ev_ref (EV_A);
1904	ev_io_stop (EV_A_ &pipe_w);	2075	ev_io_stop (EV_A_ &pipe_w);
1905		2076
1906	#if EV_USE_EVENTFD	2077	#if EV_USE_EVENTFD
…		…
1924	postfork = 0;	2095	postfork = 0;
1925	}	2096	}
1926		2097
1927	#if EV_MULTIPLICITY	2098	#if EV_MULTIPLICITY
1928		2099
1929	struct ev_loop *	2100	struct ev_loop * ecb_cold
1930	ev_loop_new (unsigned int flags)	2101	ev_loop_new (unsigned int flags)
1931	{	2102	{
1932	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2103	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933		2104
1934	memset (EV_A, 0, sizeof (struct ev_loop));	2105	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1942	}	2113	}
1943		2114
1944	#endif /* multiplicity */	2115	#endif /* multiplicity */
1945		2116
1946	#if EV_VERIFY	2117	#if EV_VERIFY
1947	static void noinline	2118	static void noinline ecb_cold
1948	verify_watcher (EV_P_ W w)	2119	verify_watcher (EV_P_ W w)
1949	{	2120	{
1950	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2121	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951		2122
1952	if (w->pending)	2123	if (w->pending)
1953	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2124	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954	}	2125	}
1955		2126
1956	static void noinline	2127	static void noinline ecb_cold
1957	verify_heap (EV_P_ ANHE *heap, int N)	2128	verify_heap (EV_P_ ANHE *heap, int N)
1958	{	2129	{
1959	int i;	2130	int i;
1960		2131
1961	for (i = HEAP0; i < N + HEAP0; ++i)	2132	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1966		2137
1967	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2138	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968	}	2139	}
1969	}	2140	}
1970		2141
1971	static void noinline	2142	static void noinline ecb_cold
1972	array_verify (EV_P_ W *ws, int cnt)	2143	array_verify (EV_P_ W *ws, int cnt)
1973	{	2144	{
1974	while (cnt--)	2145	while (cnt--)
1975	{	2146	{
1976	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2147	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1978	}	2149	}
1979	}	2150	}
1980	#endif	2151	#endif
1981		2152
1982	#if EV_FEATURE_API	2153	#if EV_FEATURE_API
1983	void	2154	void ecb_cold
1984	ev_verify (EV_P)	2155	ev_verify (EV_P)
1985	{	2156	{
1986	#if EV_VERIFY	2157	#if EV_VERIFY
1987	int i;	2158	int i;
1988	WL w;	2159	WL w;
…		…
2054	#endif	2225	#endif
2055	}	2226	}
2056	#endif	2227	#endif
2057		2228
2058	#if EV_MULTIPLICITY	2229	#if EV_MULTIPLICITY
2059	struct ev_loop *	2230	struct ev_loop * ecb_cold
2060	#else	2231	#else
2061	int	2232	int
2062	#endif	2233	#endif
2063	ev_default_loop (unsigned int flags)	2234	ev_default_loop (unsigned int flags)
2064	{	2235	{
…		…
2193	}	2364	}
2194	}	2365	}
2195		2366
2196	#if EV_PERIODIC_ENABLE	2367	#if EV_PERIODIC_ENABLE
2197		2368
2198	inline_speed	2369	static void noinline
2199	periodic_recalc (EV_P_ ev_periodic *w)	2370	periodic_recalc (EV_P_ ev_periodic *w)
2200	{	2371	{
2201	/* TODO: use slow but potentially more correct incremental algo, */	2372	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202	/* also do not rely on ceil */	2373	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;	2374
		2375	/* the above almost always errs on the low side */
		2376	while (at <= ev_rt_now)
		2377	{
		2378	ev_tstamp nat = at + w->interval;
		2379
		2380	/* when resolution fails us, we use ev_rt_now */
		2381	if (expect_false (nat == at))
		2382	{
		2383	at = ev_rt_now;
		2384	break;
		2385	}
		2386
		2387	at = nat;
		2388	}
		2389
		2390	ev_at (w) = at;
2204	}	2391	}
2205		2392
2206	/* make periodics pending */	2393	/* make periodics pending */
2207	inline_size void	2394	inline_size void
2208	periodics_reify (EV_P)	2395	periodics_reify (EV_P)
…		…
2230	downheap (periodics, periodiccnt, HEAP0);	2417	downheap (periodics, periodiccnt, HEAP0);
2231	}	2418	}
2232	else if (w->interval)	2419	else if (w->interval)
2233	{	2420	{
2234	periodic_recalc (EV_A_ w);	2421	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]);	2422	ANHE_at_cache (periodics [HEAP0]);
2250	downheap (periodics, periodiccnt, HEAP0);	2423	downheap (periodics, periodiccnt, HEAP0);
2251	}	2424	}
2252	else	2425	else
2253	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2426	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2261	}	2434	}
2262	}	2435	}
2263		2436
2264	/* simply recalculate all periodics */	2437	/* simply recalculate all periodics */
2265	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2438	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266	static void noinline	2439	static void noinline ecb_cold
2267	periodics_reschedule (EV_P)	2440	periodics_reschedule (EV_P)
2268	{	2441	{
2269	int i;	2442	int i;
2270		2443
2271	/* adjust periodics after time jump */	2444	/* adjust periodics after time jump */
…		…
2284	reheap (periodics, periodiccnt);	2457	reheap (periodics, periodiccnt);
2285	}	2458	}
2286	#endif	2459	#endif
2287		2460
2288	/* adjust all timers by a given offset */	2461	/* adjust all timers by a given offset */
2289	static void noinline	2462	static void noinline ecb_cold
2290	timers_reschedule (EV_P_ ev_tstamp adjust)	2463	timers_reschedule (EV_P_ ev_tstamp adjust)
2291	{	2464	{
2292	int i;	2465	int i;
2293		2466
2294	for (i = 0; i < timercnt; ++i)	2467	for (i = 0; i < timercnt; ++i)
…		…
2331	* doesn't hurt either as we only do this on time-jumps or	2504	* doesn't hurt either as we only do this on time-jumps or
2332	* in the unlikely event of having been preempted here.	2505	* in the unlikely event of having been preempted here.
2333	*/	2506	*/
2334	for (i = 4; --i; )	2507	for (i = 4; --i; )
2335	{	2508	{
		2509	ev_tstamp diff;
2336	rtmn_diff = ev_rt_now - mn_now;	2510	rtmn_diff = ev_rt_now - mn_now;
2337		2511
		2512	diff = odiff - rtmn_diff;
		2513
2338	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2514	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339	return; /* all is well */	2515	return; /* all is well */
2340		2516
2341	ev_rt_now = ev_time ();	2517	ev_rt_now = ev_time ();
2342	mn_now = get_clock ();	2518	mn_now = get_clock ();
2343	now_floor = mn_now;	2519	now_floor = mn_now;
…		…
2433	ev_tstamp prev_mn_now = mn_now;	2609	ev_tstamp prev_mn_now = mn_now;
2434		2610
2435	/* update time to cancel out callback processing overhead */	2611	/* update time to cancel out callback processing overhead */
2436	time_update (EV_A_ 1e100);	2612	time_update (EV_A_ 1e100);
2437		2613
		2614	/* from now on, we want a pipe-wake-up */
		2615	pipe_write_wanted = 1;
		2616
		2617	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2618
2438	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2619	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2439	{	2620	{
2440	waittime = MAX_BLOCKTIME;	2621	waittime = MAX_BLOCKTIME;
2441		2622
2442	if (timercnt)	2623	if (timercnt)
2443	{	2624	{
2444	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2625	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445	if (waittime > to) waittime = to;	2626	if (waittime > to) waittime = to;
2446	}	2627	}
2447		2628
2448	#if EV_PERIODIC_ENABLE	2629	#if EV_PERIODIC_ENABLE
2449	if (periodiccnt)	2630	if (periodiccnt)
2450	{	2631	{
2451	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2632	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452	if (waittime > to) waittime = to;	2633	if (waittime > to) waittime = to;
2453	}	2634	}
2454	#endif	2635	#endif
2455		2636
2456	/* don't let timeouts decrease the waittime below timeout_blocktime */	2637	/* don't let timeouts decrease the waittime below timeout_blocktime */
2457	if (expect_false (waittime < timeout_blocktime))	2638	if (expect_false (waittime < timeout_blocktime))
2458	waittime = timeout_blocktime;	2639	waittime = timeout_blocktime;
		2640
		2641	/* at this point, we NEED to wait, so we have to ensure */
		2642	/* to pass a minimum nonzero value to the backend */
		2643	if (expect_false (waittime < backend_mintime))
		2644	waittime = backend_mintime;
2459		2645
2460	/* extra check because io_blocktime is commonly 0 */	2646	/* extra check because io_blocktime is commonly 0 */
2461	if (expect_false (io_blocktime))	2647	if (expect_false (io_blocktime))
2462	{	2648	{
2463	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2649	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464		2650
2465	if (sleeptime > waittime - backend_fudge)	2651	if (sleeptime > waittime - backend_mintime)
2466	sleeptime = waittime - backend_fudge;	2652	sleeptime = waittime - backend_mintime;
2467		2653
2468	if (expect_true (sleeptime > 0.))	2654	if (expect_true (sleeptime > 0.))
2469	{	2655	{
2470	ev_sleep (sleeptime);	2656	ev_sleep (sleeptime);
2471	waittime -= sleeptime;	2657	waittime -= sleeptime;
…		…
2477	++loop_count;	2663	++loop_count;
2478	#endif	2664	#endif
2479	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2665	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480	backend_poll (EV_A_ waittime);	2666	backend_poll (EV_A_ waittime);
2481	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2667	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2668
		2669	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2670
		2671	if (pipe_write_skipped)
		2672	{
		2673	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2674	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2675	}
		2676
2482		2677
2483	/* update ev_rt_now, do magic */	2678	/* update ev_rt_now, do magic */
2484	time_update (EV_A_ waittime + sleeptime);	2679	time_update (EV_A_ waittime + sleeptime);
2485	}	2680	}
2486		2681
…		…
3063	if (!pend \|\| pend == path)	3258	if (!pend \|\| pend == path)
3064	break;	3259	break;
3065		3260
3066	*pend = 0;	3261	*pend = 0;
3067	w->wd = inotify_add_watch (fs_fd, path, mask);	3262	w->wd = inotify_add_watch (fs_fd, path, mask);
3068	}	3263	}
3069	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3264	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3070	}	3265	}
3071	}	3266	}
3072		3267
3073	if (w->wd >= 0)	3268	if (w->wd >= 0)
…		…
3140	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3335	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141	ofs += sizeof (struct inotify_event) + ev->len;	3336	ofs += sizeof (struct inotify_event) + ev->len;
3142	}	3337	}
3143	}	3338	}
3144		3339
3145	inline_size void	3340	inline_size void ecb_cold
3146	ev_check_2625 (EV_P)	3341	ev_check_2625 (EV_P)
3147	{	3342	{
3148	/* kernels < 2.6.25 are borked	3343	/* kernels < 2.6.25 are borked
3149	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3344	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150	*/	3345	*/
…		…
3775	}	3970	}
3776		3971
3777	/*****************************************************************************/	3972	/*****************************************************************************/
3778		3973
3779	#if EV_WALK_ENABLE	3974	#if EV_WALK_ENABLE
3780	void	3975	void ecb_cold
3781	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3976	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3782	{	3977	{
3783	int i, j;	3978	int i, j;
3784	ev_watcher_list wl, wn;	3979	ev_watcher_list wl, wn;
3785		3980

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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 1.387 by root, Wed Jul 20 01:04:43 2011 UTC

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Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.387 by root, Wed Jul 20 01:04:43 2011 UTC