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

Comparing libev/ev.c (file contents):
Revision 1.368 by root, Mon Jan 17 12:11:11 2011 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 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
…		…
376	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
377	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
378	#endif	387	#endif
379		388
380	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
381	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
382	# include <sys/select.h>	392	# include <sys/select.h>
383	# endif	393	# endif
384	#endif	394	#endif
385		395
386	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
…		…
442	#else	452	#else
443	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
444	#endif	454	#endif
445		455
446	/*	456	/*
447	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
448	* It is added to ev_rt_now when scheduling periodics
449	* to ensure progress, time-wise, even when rounding
450	* errors are against us.
451	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
452	* Better solutions welcome.
453	*/	459	*/
454	#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 /
455		462
456	#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) */
457	#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) */
458		465
459	#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)
460	#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)
461		468
462	#if __GNUC__ >= 4	469	/* the following are taken from libecb */
463	# define expect(expr,value) __builtin_expect ((expr),(value))	470	/* ecb.h start */
464	# 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
465	#else	493	#else
466	# define expect(expr,value) (expr)	494	#define ecb_inline static
467	# define noinline
468	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469	# define inline
470	# 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 /* better be safe than sorry */
		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
471	#endif	508	#endif
		509	#endif
472		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 _MSC_VER >= 1400
		517	#define ECB_MEMORY_FENCE do { } while (0)
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#elif defined(_WIN32) && defined(MemoryBarrier)
		521	#define ECB_MEMORY_FENCE MemoryBarrier ()
		522	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		523	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		524	#endif
		525	#endif
		526
		527	#ifndef ECB_MEMORY_FENCE
		528	#include <pthread.h>
		529
		530	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		531	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		532	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		533	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		534	#endif
		535
		536	#if ECB_GCC_VERSION(3,1)
		537	#define ecb_attribute(attrlist) __attribute__(attrlist)
		538	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		539	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		540	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		541	#else
		542	#define ecb_attribute(attrlist)
		543	#define ecb_is_constant(expr) 0
		544	#define ecb_expect(expr,value) (expr)
		545	#define ecb_prefetch(addr,rw,locality)
		546	#endif
		547
		548	#define ecb_noinline ecb_attribute ((__noinline__))
		549	#define ecb_noreturn ecb_attribute ((__noreturn__))
		550	#define ecb_unused ecb_attribute ((__unused__))
		551	#define ecb_const ecb_attribute ((__const__))
		552	#define ecb_pure ecb_attribute ((__pure__))
		553
		554	#if ECB_GCC_VERSION(4,3)
		555	#define ecb_artificial ecb_attribute ((__artificial__))
		556	#define ecb_hot ecb_attribute ((__hot__))
		557	#define ecb_cold ecb_attribute ((__cold__))
		558	#else
		559	#define ecb_artificial
		560	#define ecb_hot
		561	#define ecb_cold
		562	#endif
		563
		564	/* put around conditional expressions if you are very sure that the */
		565	/* expression is mostly true or mostly false. note that these return */
		566	/* booleans, not the expression. */
473	#define expect_false(expr) expect ((expr) != 0, 0)	567	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474	#define expect_true(expr) expect ((expr) != 0, 1)	568	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		569	/* ecb.h end */
		570
		571	#define expect_false(cond) ecb_expect_false (cond)
		572	#define expect_true(cond) ecb_expect_true (cond)
		573	#define noinline ecb_noinline
		574
475	#define inline_size static inline	575	#define inline_size ecb_inline
476		576
477	#if EV_FEATURE_CODE	577	#if EV_FEATURE_CODE
478	# define inline_speed static inline	578	# define inline_speed ecb_inline
479	#else	579	#else
480	# define inline_speed static noinline	580	# define inline_speed static noinline
481	#endif	581	#endif
482		582
483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	583	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
522	# include "ev_win32.c"	622	# include "ev_win32.c"
523	#endif	623	#endif
524		624
525	/*****************************************************************************/	625	/*****************************************************************************/
526		626
		627	/* define a suitable floor function (only used by periodics atm) */
		628
		629	#if EV_USE_FLOOR
		630	# include <math.h>
		631	# define ev_floor(v) floor (v)
		632	#else
		633
		634	#include <float.h>
		635
		636	/* a floor() replacement function, should be independent of ev_tstamp type */
		637	static ev_tstamp noinline
		638	ev_floor (ev_tstamp v)
		639	{
		640	/* the choice of shift factor is not terribly important */
		641	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		642	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		643	#else
		644	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		645	#endif
		646
		647	/* argument too large for an unsigned long? */
		648	if (expect_false (v >= shift))
		649	{
		650	ev_tstamp f;
		651
		652	if (v == v - 1.)
		653	return v; /* very large number */
		654
		655	f = shift * ev_floor (v * (1. / shift));
		656	return f + ev_floor (v - f);
		657	}
		658
		659	/* special treatment for negative args? */
		660	if (expect_false (v < 0.))
		661	{
		662	ev_tstamp f = -ev_floor (-v);
		663
		664	return f - (f == v ? 0 : 1);
		665	}
		666
		667	/* fits into an unsigned long */
		668	return (unsigned long)v;
		669	}
		670
		671	#endif
		672
		673	/*****************************************************************************/
		674
527	#ifdef __linux	675	#ifdef __linux
528	# include <sys/utsname.h>	676	# include <sys/utsname.h>
529	#endif	677	#endif
530		678
531	static unsigned int noinline	679	static unsigned int noinline ecb_cold
532	ev_linux_version (void)	680	ev_linux_version (void)
533	{	681	{
534	#ifdef __linux	682	#ifdef __linux
535	unsigned int v = 0;	683	unsigned int v = 0;
536	struct utsname buf;	684	struct utsname buf;
…		…
565	}	713	}
566		714
567	/*****************************************************************************/	715	/*****************************************************************************/
568		716
569	#if EV_AVOID_STDIO	717	#if EV_AVOID_STDIO
570	static void noinline	718	static void noinline ecb_cold
571	ev_printerr (const char *msg)	719	ev_printerr (const char *msg)
572	{	720	{
573	write (STDERR_FILENO, msg, strlen (msg));	721	write (STDERR_FILENO, msg, strlen (msg));
574	}	722	}
575	#endif	723	#endif
576		724
577	static void (syserr_cb)(const char msg);	725	static void (syserr_cb)(const char msg);
578		726
579	void	727	void ecb_cold
580	ev_set_syserr_cb (void (cb)(const char msg))	728	ev_set_syserr_cb (void (cb)(const char msg))
581	{	729	{
582	syserr_cb = cb;	730	syserr_cb = cb;
583	}	731	}
584		732
585	static void noinline	733	static void noinline ecb_cold
586	ev_syserr (const char *msg)	734	ev_syserr (const char *msg)
587	{	735	{
588	if (!msg)	736	if (!msg)
589	msg = "(libev) system error";	737	msg = "(libev) system error";
590		738
…		…
623	#endif	771	#endif
624	}	772	}
625		773
626	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	774	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
627		775
628	void	776	void ecb_cold
629	ev_set_allocator (void (cb)(void *ptr, long size))	777	ev_set_allocator (void (cb)(void *ptr, long size))
630	{	778	{
631	alloc = cb;	779	alloc = cb;
632	}	780	}
633		781
…		…
815	select (0, 0, 0, 0, &tv);	963	select (0, 0, 0, 0, &tv);
816	#endif	964	#endif
817	}	965	}
818	}	966	}
819		967
820	inline_speed int
821	ev_timeout_to_ms (ev_tstamp timeout)
822	{
823	int ms = timeout * 1000. + .999999;
824
825	return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
826	}
827
828	/*****************************************************************************/	968	/*****************************************************************************/
829		969
830	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	970	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
831		971
832	/* find a suitable new size for the given array, */	972	/* find a suitable new size for the given array, */
…		…
850	}	990	}
851		991
852	return ncur;	992	return ncur;
853	}	993	}
854		994
855	static noinline void *	995	static void * noinline ecb_cold
856	array_realloc (int elem, void base, int cur, int cnt)	996	array_realloc (int elem, void base, int cur, int cnt)
857	{	997	{
858	cur = array_nextsize (elem, cur, cnt);	998	cur = array_nextsize (elem, cur, cnt);
859	return ev_realloc (base, elem * *cur);	999	return ev_realloc (base, elem * *cur);
860	}	1000	}
…		…
863	memset ((void )(base), 0, sizeof ((base)) * (count))	1003	memset ((void )(base), 0, sizeof ((base)) * (count))
864		1004
865	#define array_needsize(type,base,cur,cnt,init) \	1005	#define array_needsize(type,base,cur,cnt,init) \
866	if (expect_false ((cnt) > (cur))) \	1006	if (expect_false ((cnt) > (cur))) \
867	{ \	1007	{ \
868	int ocur_ = (cur); \	1008	int ecb_unused ocur_ = (cur); \
869	(base) = (type *)array_realloc \	1009	(base) = (type *)array_realloc \
870	(sizeof (type), (base), &(cur), (cnt)); \	1010	(sizeof (type), (base), &(cur), (cnt)); \
871	init ((base) + (ocur_), (cur) - ocur_); \	1011	init ((base) + (ocur_), (cur) - ocur_); \
872	}	1012	}
873		1013
…		…
973	inline_size void	1113	inline_size void
974	fd_reify (EV_P)	1114	fd_reify (EV_P)
975	{	1115	{
976	int i;	1116	int i;
977		1117
		1118	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1119	for (i = 0; i < fdchangecnt; ++i)
		1120	{
		1121	int fd = fdchanges [i];
		1122	ANFD *anfd = anfds + fd;
		1123
		1124	if (anfd->reify & EV__IOFDSET && anfd->head)
		1125	{
		1126	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1127
		1128	if (handle != anfd->handle)
		1129	{
		1130	unsigned long arg;
		1131
		1132	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1133
		1134	/* handle changed, but fd didn't - we need to do it in two steps */
		1135	backend_modify (EV_A_ fd, anfd->events, 0);
		1136	anfd->events = 0;
		1137	anfd->handle = handle;
		1138	}
		1139	}
		1140	}
		1141	#endif
		1142
978	for (i = 0; i < fdchangecnt; ++i)	1143	for (i = 0; i < fdchangecnt; ++i)
979	{	1144	{
980	int fd = fdchanges [i];	1145	int fd = fdchanges [i];
981	ANFD *anfd = anfds + fd;	1146	ANFD *anfd = anfds + fd;
982	ev_io *w;	1147	ev_io *w;
…		…
984	unsigned char o_events = anfd->events;	1149	unsigned char o_events = anfd->events;
985	unsigned char o_reify = anfd->reify;	1150	unsigned char o_reify = anfd->reify;
986		1151
987	anfd->reify = 0;	1152	anfd->reify = 0;
988		1153
989	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
990	if (o_reify & EV__IOFDSET)
991	{
992	unsigned long arg;
993	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
994	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
995	printf ("oi %d %x\n", fd, anfd->handle);//D
996	}
997	#endif
998
999	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1154	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
1000	{	1155	{
1001	anfd->events = 0;	1156	anfd->events = 0;
1002		1157
1003	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1158	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1028	fdchanges [fdchangecnt - 1] = fd;	1183	fdchanges [fdchangecnt - 1] = fd;
1029	}	1184	}
1030	}	1185	}
1031		1186
1032	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1187	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1033	inline_speed void	1188	inline_speed void ecb_cold
1034	fd_kill (EV_P_ int fd)	1189	fd_kill (EV_P_ int fd)
1035	{	1190	{
1036	ev_io *w;	1191	ev_io *w;
1037		1192
1038	while ((w = (ev_io *)anfds [fd].head))	1193	while ((w = (ev_io *)anfds [fd].head))
…		…
1041	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1196	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1042	}	1197	}
1043	}	1198	}
1044		1199
1045	/* check whether the given fd is actually valid, for error recovery */	1200	/* check whether the given fd is actually valid, for error recovery */
1046	inline_size int	1201	inline_size int ecb_cold
1047	fd_valid (int fd)	1202	fd_valid (int fd)
1048	{	1203	{
1049	#ifdef _WIN32	1204	#ifdef _WIN32
1050	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1205	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1051	#else	1206	#else
1052	return fcntl (fd, F_GETFD) != -1;	1207	return fcntl (fd, F_GETFD) != -1;
1053	#endif	1208	#endif
1054	}	1209	}
1055		1210
1056	/* called on EBADF to verify fds */	1211	/* called on EBADF to verify fds */
1057	static void noinline	1212	static void noinline ecb_cold
1058	fd_ebadf (EV_P)	1213	fd_ebadf (EV_P)
1059	{	1214	{
1060	int fd;	1215	int fd;
1061		1216
1062	for (fd = 0; fd < anfdmax; ++fd)	1217	for (fd = 0; fd < anfdmax; ++fd)
…		…
1064	if (!fd_valid (fd) && errno == EBADF)	1219	if (!fd_valid (fd) && errno == EBADF)
1065	fd_kill (EV_A_ fd);	1220	fd_kill (EV_A_ fd);
1066	}	1221	}
1067		1222
1068	/* called on ENOMEM in select/poll to kill some fds and retry */	1223	/* called on ENOMEM in select/poll to kill some fds and retry */
1069	static void noinline	1224	static void noinline ecb_cold
1070	fd_enomem (EV_P)	1225	fd_enomem (EV_P)
1071	{	1226	{
1072	int fd;	1227	int fd;
1073		1228
1074	for (fd = anfdmax; fd--; )	1229	for (fd = anfdmax; fd--; )
…		…
1269		1424
1270	/*****************************************************************************/	1425	/*****************************************************************************/
1271		1426
1272	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1427	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1273		1428
1274	static void noinline	1429	static void noinline ecb_cold
1275	evpipe_init (EV_P)	1430	evpipe_init (EV_P)
1276	{	1431	{
1277	if (!ev_is_active (&pipe_w))	1432	if (!ev_is_active (&pipe_w))
1278	{	1433	{
1279	# if EV_USE_EVENTFD	1434	# if EV_USE_EVENTFD
…		…
1301	ev_io_start (EV_A_ &pipe_w);	1456	ev_io_start (EV_A_ &pipe_w);
1302	ev_unref (EV_A); /* watcher should not keep loop alive */	1457	ev_unref (EV_A); /* watcher should not keep loop alive */
1303	}	1458	}
1304	}	1459	}
1305		1460
1306	inline_size void	1461	inline_speed void
1307	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1462	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1308	{	1463	{
1309	if (!*flag)	1464	if (expect_true (*flag))
		1465	return;
		1466
		1467	*flag = 1;
		1468
		1469	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1470
		1471	pipe_write_skipped = 1;
		1472
		1473	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1474
		1475	if (pipe_write_wanted)
1310	{	1476	{
		1477	int old_errno;
		1478
		1479	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1480
1311	int old_errno = errno; /* save errno because write might clobber it */	1481	old_errno = errno; /* save errno because write will clobber it */
1312	char dummy;
1313
1314	*flag = 1;
1315		1482
1316	#if EV_USE_EVENTFD	1483	#if EV_USE_EVENTFD
1317	if (evfd >= 0)	1484	if (evfd >= 0)
1318	{	1485	{
1319	uint64_t counter = 1;	1486	uint64_t counter = 1;
1320	write (evfd, &counter, sizeof (uint64_t));	1487	write (evfd, &counter, sizeof (uint64_t));
1321	}	1488	}
1322	else	1489	else
1323	#endif	1490	#endif
		1491	{
1324	/* win32 people keep sending patches that change this write() to send() */	1492	/* win32 people keep sending patches that change this write() to send() */
1325	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1493	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1326	/* so when you think this write should be a send instead, please find out */	1494	/* so when you think this write should be a send instead, please find out */
1327	/* where your send() is from - it's definitely not the microsoft send, and */	1495	/* where your send() is from - it's definitely not the microsoft send, and */
1328	/* tell me. thank you. */	1496	/* tell me. thank you. */
1329	write (evpipe [1], &dummy, 1);	1497	write (evpipe [1], &(evpipe [1]), 1);
		1498	}
1330		1499
1331	errno = old_errno;	1500	errno = old_errno;
1332	}	1501	}
1333	}	1502	}
1334		1503
…		…
1337	static void	1506	static void
1338	pipecb (EV_P_ ev_io *iow, int revents)	1507	pipecb (EV_P_ ev_io *iow, int revents)
1339	{	1508	{
1340	int i;	1509	int i;
1341		1510
		1511	if (revents & EV_READ)
		1512	{
1342	#if EV_USE_EVENTFD	1513	#if EV_USE_EVENTFD
1343	if (evfd >= 0)	1514	if (evfd >= 0)
1344	{	1515	{
1345	uint64_t counter;	1516	uint64_t counter;
1346	read (evfd, &counter, sizeof (uint64_t));	1517	read (evfd, &counter, sizeof (uint64_t));
1347	}	1518	}
1348	else	1519	else
1349	#endif	1520	#endif
1350	{	1521	{
1351	char dummy;	1522	char dummy;
1352	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1523	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1353	read (evpipe [0], &dummy, 1);	1524	read (evpipe [0], &dummy, 1);
		1525	}
1354	}	1526	}
1355		1527
		1528	pipe_write_skipped = 0;
		1529
		1530	#if EV_SIGNAL_ENABLE
1356	if (sig_pending)	1531	if (sig_pending)
1357	{	1532	{
1358	sig_pending = 0;	1533	sig_pending = 0;
1359		1534
1360	for (i = EV_NSIG - 1; i--; )	1535	for (i = EV_NSIG - 1; i--; )
1361	if (expect_false (signals [i].pending))	1536	if (expect_false (signals [i].pending))
1362	ev_feed_signal_event (EV_A_ i + 1);	1537	ev_feed_signal_event (EV_A_ i + 1);
1363	}	1538	}
		1539	#endif
1364		1540
1365	#if EV_ASYNC_ENABLE	1541	#if EV_ASYNC_ENABLE
1366	if (async_pending)	1542	if (async_pending)
1367	{	1543	{
1368	async_pending = 0;	1544	async_pending = 0;
…		…
1386	EV_P = signals [signum - 1].loop;	1562	EV_P = signals [signum - 1].loop;
1387		1563
1388	if (!EV_A)	1564	if (!EV_A)
1389	return;	1565	return;
1390	#endif	1566	#endif
		1567
		1568	if (!ev_active (&pipe_w))
		1569	return;
1391		1570
1392	signals [signum - 1].pending = 1;	1571	signals [signum - 1].pending = 1;
1393	evpipe_write (EV_A_ &sig_pending);	1572	evpipe_write (EV_A_ &sig_pending);
1394	}	1573	}
1395		1574
…		…
1527	#endif	1706	#endif
1528	#if EV_USE_SELECT	1707	#if EV_USE_SELECT
1529	# include "ev_select.c"	1708	# include "ev_select.c"
1530	#endif	1709	#endif
1531		1710
1532	int	1711	int ecb_cold
1533	ev_version_major (void)	1712	ev_version_major (void)
1534	{	1713	{
1535	return EV_VERSION_MAJOR;	1714	return EV_VERSION_MAJOR;
1536	}	1715	}
1537		1716
1538	int	1717	int ecb_cold
1539	ev_version_minor (void)	1718	ev_version_minor (void)
1540	{	1719	{
1541	return EV_VERSION_MINOR;	1720	return EV_VERSION_MINOR;
1542	}	1721	}
1543		1722
1544	/* return true if we are running with elevated privileges and should ignore env variables */	1723	/* return true if we are running with elevated privileges and should ignore env variables */
1545	int inline_size	1724	int inline_size ecb_cold
1546	enable_secure (void)	1725	enable_secure (void)
1547	{	1726	{
1548	#ifdef _WIN32	1727	#ifdef _WIN32
1549	return 0;	1728	return 0;
1550	#else	1729	#else
1551	return getuid () != geteuid ()	1730	return getuid () != geteuid ()
1552	\|\| getgid () != getegid ();	1731	\|\| getgid () != getegid ();
1553	#endif	1732	#endif
1554	}	1733	}
1555		1734
1556	unsigned int	1735	unsigned int ecb_cold
1557	ev_supported_backends (void)	1736	ev_supported_backends (void)
1558	{	1737	{
1559	unsigned int flags = 0;	1738	unsigned int flags = 0;
1560		1739
1561	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1740	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1565	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1744	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1566		1745
1567	return flags;	1746	return flags;
1568	}	1747	}
1569		1748
1570	unsigned int	1749	unsigned int ecb_cold
1571	ev_recommended_backends (void)	1750	ev_recommended_backends (void)
1572	{	1751	{
1573	unsigned int flags = ev_supported_backends ();	1752	unsigned int flags = ev_supported_backends ();
1574		1753
1575	#ifndef __NetBSD__	1754	#ifndef __NetBSD__
…		…
1587	#endif	1766	#endif
1588		1767
1589	return flags;	1768	return flags;
1590	}	1769	}
1591		1770
1592	unsigned int	1771	unsigned int ecb_cold
1593	ev_embeddable_backends (void)	1772	ev_embeddable_backends (void)
1594	{	1773	{
1595	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1774	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1596		1775
1597	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1776	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1642	ev_userdata (EV_P)	1821	ev_userdata (EV_P)
1643	{	1822	{
1644	return userdata;	1823	return userdata;
1645	}	1824	}
1646		1825
		1826	void
1647	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1827	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1648	{	1828	{
1649	invoke_cb = invoke_pending_cb;	1829	invoke_cb = invoke_pending_cb;
1650	}	1830	}
1651		1831
		1832	void
1652	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1833	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1653	{	1834	{
1654	release_cb = release;	1835	release_cb = release;
1655	acquire_cb = acquire;	1836	acquire_cb = acquire;
1656	}	1837	}
1657	#endif	1838	#endif
1658		1839
1659	/* initialise a loop structure, must be zero-initialised */	1840	/* initialise a loop structure, must be zero-initialised */
1660	static void noinline	1841	static void noinline ecb_cold
1661	loop_init (EV_P_ unsigned int flags)	1842	loop_init (EV_P_ unsigned int flags)
1662	{	1843	{
1663	if (!backend)	1844	if (!backend)
1664	{	1845	{
1665	origflags = flags;	1846	origflags = flags;
…		…
1693	if (!(flags & EVFLAG_NOENV)	1874	if (!(flags & EVFLAG_NOENV)
1694	&& !enable_secure ()	1875	&& !enable_secure ()
1695	&& getenv ("LIBEV_FLAGS"))	1876	&& getenv ("LIBEV_FLAGS"))
1696	flags = atoi (getenv ("LIBEV_FLAGS"));	1877	flags = atoi (getenv ("LIBEV_FLAGS"));
1697		1878
1698	ev_rt_now = ev_time ();	1879	ev_rt_now = ev_time ();
1699	mn_now = get_clock ();	1880	mn_now = get_clock ();
1700	now_floor = mn_now;	1881	now_floor = mn_now;
1701	rtmn_diff = ev_rt_now - mn_now;	1882	rtmn_diff = ev_rt_now - mn_now;
1702	#if EV_FEATURE_API	1883	#if EV_FEATURE_API
1703	invoke_cb = ev_invoke_pending;	1884	invoke_cb = ev_invoke_pending;
1704	#endif	1885	#endif
1705		1886
1706	io_blocktime = 0.;	1887	io_blocktime = 0.;
1707	timeout_blocktime = 0.;	1888	timeout_blocktime = 0.;
1708	backend = 0;	1889	backend = 0;
1709	backend_fd = -1;	1890	backend_fd = -1;
1710	sig_pending = 0;	1891	sig_pending = 0;
1711	#if EV_ASYNC_ENABLE	1892	#if EV_ASYNC_ENABLE
1712	async_pending = 0;	1893	async_pending = 0;
1713	#endif	1894	#endif
		1895	pipe_write_skipped = 0;
		1896	pipe_write_wanted = 0;
1714	#if EV_USE_INOTIFY	1897	#if EV_USE_INOTIFY
1715	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1898	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1716	#endif	1899	#endif
1717	#if EV_USE_SIGNALFD	1900	#if EV_USE_SIGNALFD
1718	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1901	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1719	#endif	1902	#endif
1720		1903
1721	if (!(flags & EVBACKEND_MASK))	1904	if (!(flags & EVBACKEND_MASK))
1722	flags \|= ev_recommended_backends ();	1905	flags \|= ev_recommended_backends ();
1723		1906
…		…
1748	#endif	1931	#endif
1749	}	1932	}
1750	}	1933	}
1751		1934
1752	/* free up a loop structure */	1935	/* free up a loop structure */
1753	void	1936	void ecb_cold
1754	ev_loop_destroy (EV_P)	1937	ev_loop_destroy (EV_P)
1755	{	1938	{
1756	int i;	1939	int i;
1757		1940
1758	#if EV_MULTIPLICITY	1941	#if EV_MULTIPLICITY
…		…
1888	infy_fork (EV_A);	2071	infy_fork (EV_A);
1889	#endif	2072	#endif
1890		2073
1891	if (ev_is_active (&pipe_w))	2074	if (ev_is_active (&pipe_w))
1892	{	2075	{
1893	/* this "locks" the handlers against writing to the pipe */	2076	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1894	/* while we modify the fd vars */
1895	sig_pending = 1;
1896	#if EV_ASYNC_ENABLE
1897	async_pending = 1;
1898	#endif
1899		2077
1900	ev_ref (EV_A);	2078	ev_ref (EV_A);
1901	ev_io_stop (EV_A_ &pipe_w);	2079	ev_io_stop (EV_A_ &pipe_w);
1902		2080
1903	#if EV_USE_EVENTFD	2081	#if EV_USE_EVENTFD
…		…
1921	postfork = 0;	2099	postfork = 0;
1922	}	2100	}
1923		2101
1924	#if EV_MULTIPLICITY	2102	#if EV_MULTIPLICITY
1925		2103
1926	struct ev_loop *	2104	struct ev_loop * ecb_cold
1927	ev_loop_new (unsigned int flags)	2105	ev_loop_new (unsigned int flags)
1928	{	2106	{
1929	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2107	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1930		2108
1931	memset (EV_A, 0, sizeof (struct ev_loop));	2109	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1939	}	2117	}
1940		2118
1941	#endif /* multiplicity */	2119	#endif /* multiplicity */
1942		2120
1943	#if EV_VERIFY	2121	#if EV_VERIFY
1944	static void noinline	2122	static void noinline ecb_cold
1945	verify_watcher (EV_P_ W w)	2123	verify_watcher (EV_P_ W w)
1946	{	2124	{
1947	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2125	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1948		2126
1949	if (w->pending)	2127	if (w->pending)
1950	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2128	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1951	}	2129	}
1952		2130
1953	static void noinline	2131	static void noinline ecb_cold
1954	verify_heap (EV_P_ ANHE *heap, int N)	2132	verify_heap (EV_P_ ANHE *heap, int N)
1955	{	2133	{
1956	int i;	2134	int i;
1957		2135
1958	for (i = HEAP0; i < N + HEAP0; ++i)	2136	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1963		2141
1964	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2142	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1965	}	2143	}
1966	}	2144	}
1967		2145
1968	static void noinline	2146	static void noinline ecb_cold
1969	array_verify (EV_P_ W *ws, int cnt)	2147	array_verify (EV_P_ W *ws, int cnt)
1970	{	2148	{
1971	while (cnt--)	2149	while (cnt--)
1972	{	2150	{
1973	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2151	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1975	}	2153	}
1976	}	2154	}
1977	#endif	2155	#endif
1978		2156
1979	#if EV_FEATURE_API	2157	#if EV_FEATURE_API
1980	void	2158	void ecb_cold
1981	ev_verify (EV_P)	2159	ev_verify (EV_P)
1982	{	2160	{
1983	#if EV_VERIFY	2161	#if EV_VERIFY
1984	int i;	2162	int i;
1985	WL w;	2163	WL w;
…		…
2051	#endif	2229	#endif
2052	}	2230	}
2053	#endif	2231	#endif
2054		2232
2055	#if EV_MULTIPLICITY	2233	#if EV_MULTIPLICITY
2056	struct ev_loop *	2234	struct ev_loop * ecb_cold
2057	#else	2235	#else
2058	int	2236	int
2059	#endif	2237	#endif
2060	ev_default_loop (unsigned int flags)	2238	ev_default_loop (unsigned int flags)
2061	{	2239	{
…		…
2189	feed_reverse_done (EV_A_ EV_TIMER);	2367	feed_reverse_done (EV_A_ EV_TIMER);
2190	}	2368	}
2191	}	2369	}
2192		2370
2193	#if EV_PERIODIC_ENABLE	2371	#if EV_PERIODIC_ENABLE
		2372
		2373	static void noinline
		2374	periodic_recalc (EV_P_ ev_periodic *w)
		2375	{
		2376	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2377	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2378
		2379	/* the above almost always errs on the low side */
		2380	while (at <= ev_rt_now)
		2381	{
		2382	ev_tstamp nat = at + w->interval;
		2383
		2384	/* when resolution fails us, we use ev_rt_now */
		2385	if (expect_false (nat == at))
		2386	{
		2387	at = ev_rt_now;
		2388	break;
		2389	}
		2390
		2391	at = nat;
		2392	}
		2393
		2394	ev_at (w) = at;
		2395	}
		2396
2194	/* make periodics pending */	2397	/* make periodics pending */
2195	inline_size void	2398	inline_size void
2196	periodics_reify (EV_P)	2399	periodics_reify (EV_P)
2197	{	2400	{
2198	EV_FREQUENT_CHECK;	2401	EV_FREQUENT_CHECK;
…		…
2217	ANHE_at_cache (periodics [HEAP0]);	2420	ANHE_at_cache (periodics [HEAP0]);
2218	downheap (periodics, periodiccnt, HEAP0);	2421	downheap (periodics, periodiccnt, HEAP0);
2219	}	2422	}
2220	else if (w->interval)	2423	else if (w->interval)
2221	{	2424	{
2222	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2425	periodic_recalc (EV_A_ w);
2223	/* if next trigger time is not sufficiently in the future, put it there */
2224	/* this might happen because of floating point inexactness */
2225	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2226	{
2227	ev_at (w) += w->interval;
2228
2229	/* if interval is unreasonably low we might still have a time in the past */
2230	/* so correct this. this will make the periodic very inexact, but the user */
2231	/* has effectively asked to get triggered more often than possible */
2232	if (ev_at (w) < ev_rt_now)
2233	ev_at (w) = ev_rt_now;
2234	}
2235
2236	ANHE_at_cache (periodics [HEAP0]);	2426	ANHE_at_cache (periodics [HEAP0]);
2237	downheap (periodics, periodiccnt, HEAP0);	2427	downheap (periodics, periodiccnt, HEAP0);
2238	}	2428	}
2239	else	2429	else
2240	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2430	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2248	}	2438	}
2249	}	2439	}
2250		2440
2251	/* simply recalculate all periodics */	2441	/* simply recalculate all periodics */
2252	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2442	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2253	static void noinline	2443	static void noinline ecb_cold
2254	periodics_reschedule (EV_P)	2444	periodics_reschedule (EV_P)
2255	{	2445	{
2256	int i;	2446	int i;
2257		2447
2258	/* adjust periodics after time jump */	2448	/* adjust periodics after time jump */
…		…
2261	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2451	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2262		2452
2263	if (w->reschedule_cb)	2453	if (w->reschedule_cb)
2264	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2454	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2265	else if (w->interval)	2455	else if (w->interval)
2266	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2456	periodic_recalc (EV_A_ w);
2267		2457
2268	ANHE_at_cache (periodics [i]);	2458	ANHE_at_cache (periodics [i]);
2269	}	2459	}
2270		2460
2271	reheap (periodics, periodiccnt);	2461	reheap (periodics, periodiccnt);
2272	}	2462	}
2273	#endif	2463	#endif
2274		2464
2275	/* adjust all timers by a given offset */	2465	/* adjust all timers by a given offset */
2276	static void noinline	2466	static void noinline ecb_cold
2277	timers_reschedule (EV_P_ ev_tstamp adjust)	2467	timers_reschedule (EV_P_ ev_tstamp adjust)
2278	{	2468	{
2279	int i;	2469	int i;
2280		2470
2281	for (i = 0; i < timercnt; ++i)	2471	for (i = 0; i < timercnt; ++i)
…		…
2318	* doesn't hurt either as we only do this on time-jumps or	2508	* doesn't hurt either as we only do this on time-jumps or
2319	* in the unlikely event of having been preempted here.	2509	* in the unlikely event of having been preempted here.
2320	*/	2510	*/
2321	for (i = 4; --i; )	2511	for (i = 4; --i; )
2322	{	2512	{
		2513	ev_tstamp diff;
2323	rtmn_diff = ev_rt_now - mn_now;	2514	rtmn_diff = ev_rt_now - mn_now;
2324		2515
		2516	diff = odiff - rtmn_diff;
		2517
2325	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2518	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2326	return; /* all is well */	2519	return; /* all is well */
2327		2520
2328	ev_rt_now = ev_time ();	2521	ev_rt_now = ev_time ();
2329	mn_now = get_clock ();	2522	mn_now = get_clock ();
2330	now_floor = mn_now;	2523	now_floor = mn_now;
…		…
2420	ev_tstamp prev_mn_now = mn_now;	2613	ev_tstamp prev_mn_now = mn_now;
2421		2614
2422	/* update time to cancel out callback processing overhead */	2615	/* update time to cancel out callback processing overhead */
2423	time_update (EV_A_ 1e100);	2616	time_update (EV_A_ 1e100);
2424		2617
		2618	/* from now on, we want a pipe-wake-up */
		2619	pipe_write_wanted = 1;
		2620
		2621	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2622
2425	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2623	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2426	{	2624	{
2427	waittime = MAX_BLOCKTIME;	2625	waittime = MAX_BLOCKTIME;
2428		2626
2429	if (timercnt)	2627	if (timercnt)
2430	{	2628	{
2431	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2629	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2432	if (waittime > to) waittime = to;	2630	if (waittime > to) waittime = to;
2433	}	2631	}
2434		2632
2435	#if EV_PERIODIC_ENABLE	2633	#if EV_PERIODIC_ENABLE
2436	if (periodiccnt)	2634	if (periodiccnt)
2437	{	2635	{
2438	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2636	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2439	if (waittime > to) waittime = to;	2637	if (waittime > to) waittime = to;
2440	}	2638	}
2441	#endif	2639	#endif
2442		2640
2443	/* don't let timeouts decrease the waittime below timeout_blocktime */	2641	/* don't let timeouts decrease the waittime below timeout_blocktime */
2444	if (expect_false (waittime < timeout_blocktime))	2642	if (expect_false (waittime < timeout_blocktime))
2445	waittime = timeout_blocktime;	2643	waittime = timeout_blocktime;
		2644
		2645	/* at this point, we NEED to wait, so we have to ensure */
		2646	/* to pass a minimum nonzero value to the backend */
		2647	if (expect_false (waittime < backend_mintime))
		2648	waittime = backend_mintime;
2446		2649
2447	/* extra check because io_blocktime is commonly 0 */	2650	/* extra check because io_blocktime is commonly 0 */
2448	if (expect_false (io_blocktime))	2651	if (expect_false (io_blocktime))
2449	{	2652	{
2450	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2653	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2451		2654
2452	if (sleeptime > waittime - backend_fudge)	2655	if (sleeptime > waittime - backend_mintime)
2453	sleeptime = waittime - backend_fudge;	2656	sleeptime = waittime - backend_mintime;
2454		2657
2455	if (expect_true (sleeptime > 0.))	2658	if (expect_true (sleeptime > 0.))
2456	{	2659	{
2457	ev_sleep (sleeptime);	2660	ev_sleep (sleeptime);
2458	waittime -= sleeptime;	2661	waittime -= sleeptime;
…		…
2464	++loop_count;	2667	++loop_count;
2465	#endif	2668	#endif
2466	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2669	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2467	backend_poll (EV_A_ waittime);	2670	backend_poll (EV_A_ waittime);
2468	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2671	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2672
		2673	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2674
		2675	if (pipe_write_skipped)
		2676	{
		2677	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2678	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2679	}
		2680
2469		2681
2470	/* update ev_rt_now, do magic */	2682	/* update ev_rt_now, do magic */
2471	time_update (EV_A_ waittime + sleeptime);	2683	time_update (EV_A_ waittime + sleeptime);
2472	}	2684	}
2473		2685
…		…
2763	if (w->reschedule_cb)	2975	if (w->reschedule_cb)
2764	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2976	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2765	else if (w->interval)	2977	else if (w->interval)
2766	{	2978	{
2767	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2979	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2768	/* this formula differs from the one in periodic_reify because we do not always round up */	2980	periodic_recalc (EV_A_ w);
2769	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2770	}	2981	}
2771	else	2982	else
2772	ev_at (w) = w->offset;	2983	ev_at (w) = w->offset;
2773		2984
2774	EV_FREQUENT_CHECK;	2985	EV_FREQUENT_CHECK;
…		…
3051	if (!pend \|\| pend == path)	3262	if (!pend \|\| pend == path)
3052	break;	3263	break;
3053		3264
3054	*pend = 0;	3265	*pend = 0;
3055	w->wd = inotify_add_watch (fs_fd, path, mask);	3266	w->wd = inotify_add_watch (fs_fd, path, mask);
3056	}	3267	}
3057	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3268	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3058	}	3269	}
3059	}	3270	}
3060		3271
3061	if (w->wd >= 0)	3272	if (w->wd >= 0)
…		…
3128	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3339	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3129	ofs += sizeof (struct inotify_event) + ev->len;	3340	ofs += sizeof (struct inotify_event) + ev->len;
3130	}	3341	}
3131	}	3342	}
3132		3343
3133	inline_size void	3344	inline_size void ecb_cold
3134	ev_check_2625 (EV_P)	3345	ev_check_2625 (EV_P)
3135	{	3346	{
3136	/* kernels < 2.6.25 are borked	3347	/* kernels < 2.6.25 are borked
3137	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3348	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3138	*/	3349	*/
…		…
3763	}	3974	}
3764		3975
3765	/*****************************************************************************/	3976	/*****************************************************************************/
3766		3977
3767	#if EV_WALK_ENABLE	3978	#if EV_WALK_ENABLE
3768	void	3979	void ecb_cold
3769	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3980	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3770	{	3981	{
3771	int i, j;	3982	int i, j;
3772	ev_watcher_list wl, wn;	3983	ev_watcher_list wl, wn;
3773		3984

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Comparing libev/ev.c (file contents): Revision 1.368 by root, Mon Jan 17 12:11:11 2011 UTC vs. Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.368 by root, Mon Jan 17 12:11:11 2011 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC