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

Comparing libev/ev.c (file contents):
Revision 1.364 by root, Sun Oct 24 21:51:03 2010 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010 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 && 0 /* TODO: only true when using volatiles */
		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)
		521	#include <WinNT.h>
		522	#define ECB_MEMORY_FENCE MemoryBarrier ()
		523	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		524	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		525	#endif
		526	#endif
		527
		528	#ifndef ECB_MEMORY_FENCE
		529	#include <pthread.h>
		530
		531	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		532	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		533	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		534	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		535	#endif
		536
		537	#if ECB_GCC_VERSION(3,1)
		538	#define ecb_attribute(attrlist) __attribute__(attrlist)
		539	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		540	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		541	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		542	#else
		543	#define ecb_attribute(attrlist)
		544	#define ecb_is_constant(expr) 0
		545	#define ecb_expect(expr,value) (expr)
		546	#define ecb_prefetch(addr,rw,locality)
		547	#endif
		548
		549	#define ecb_noinline ecb_attribute ((__noinline__))
		550	#define ecb_noreturn ecb_attribute ((__noreturn__))
		551	#define ecb_unused ecb_attribute ((__unused__))
		552	#define ecb_const ecb_attribute ((__const__))
		553	#define ecb_pure ecb_attribute ((__pure__))
		554
		555	#if ECB_GCC_VERSION(4,3)
		556	#define ecb_artificial ecb_attribute ((__artificial__))
		557	#define ecb_hot ecb_attribute ((__hot__))
		558	#define ecb_cold ecb_attribute ((__cold__))
		559	#else
		560	#define ecb_artificial
		561	#define ecb_hot
		562	#define ecb_cold
		563	#endif
		564
		565	/* put around conditional expressions if you are very sure that the */
		566	/* expression is mostly true or mostly false. note that these return */
		567	/* booleans, not the expression. */
473	#define expect_false(expr) expect ((expr) != 0, 0)	568	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474	#define expect_true(expr) expect ((expr) != 0, 1)	569	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		570	/* ecb.h end */
		571
		572	#define expect_false(cond) ecb_expect_false (cond)
		573	#define expect_true(cond) ecb_expect_true (cond)
		574	#define noinline ecb_noinline
		575
475	#define inline_size static inline	576	#define inline_size ecb_inline
476		577
477	#if EV_FEATURE_CODE	578	#if EV_FEATURE_CODE
478	# define inline_speed static inline	579	# define inline_speed ecb_inline
479	#else	580	#else
480	# define inline_speed static noinline	581	# define inline_speed static noinline
481	#endif	582	#endif
482		583
483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	584	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
522	# include "ev_win32.c"	623	# include "ev_win32.c"
523	#endif	624	#endif
524		625
525	/*****************************************************************************/	626	/*****************************************************************************/
526		627
		628	/* define a suitable floor function (only used by periodics atm) */
		629
		630	#if EV_USE_FLOOR
		631	# include <math.h>
		632	# define ev_floor(v) floor (v)
		633	#else
		634
		635	#include <float.h>
		636
		637	/* a floor() replacement function, should be independent of ev_tstamp type */
		638	static ev_tstamp noinline
		639	ev_floor (ev_tstamp v)
		640	{
		641	/* the choice of shift factor is not terribly important */
		642	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		643	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		644	#else
		645	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		646	#endif
		647
		648	/* argument too large for an unsigned long? */
		649	if (expect_false (v >= shift))
		650	{
		651	ev_tstamp f;
		652
		653	if (v == v - 1.)
		654	return v; /* very large number */
		655
		656	f = shift * ev_floor (v * (1. / shift));
		657	return f + ev_floor (v - f);
		658	}
		659
		660	/* special treatment for negative args? */
		661	if (expect_false (v < 0.))
		662	{
		663	ev_tstamp f = -ev_floor (-v);
		664
		665	return f - (f == v ? 0 : 1);
		666	}
		667
		668	/* fits into an unsigned long */
		669	return (unsigned long)v;
		670	}
		671
		672	#endif
		673
		674	/*****************************************************************************/
		675
527	#ifdef __linux	676	#ifdef __linux
528	# include <sys/utsname.h>	677	# include <sys/utsname.h>
529	#endif	678	#endif
530		679
531	static unsigned int noinline	680	static unsigned int noinline ecb_cold
532	ev_linux_version (void)	681	ev_linux_version (void)
533	{	682	{
534	#ifdef __linux	683	#ifdef __linux
535	unsigned int v = 0;	684	unsigned int v = 0;
536	struct utsname buf;	685	struct utsname buf;
…		…
565	}	714	}
566		715
567	/*****************************************************************************/	716	/*****************************************************************************/
568		717
569	#if EV_AVOID_STDIO	718	#if EV_AVOID_STDIO
570	static void noinline	719	static void noinline ecb_cold
571	ev_printerr (const char *msg)	720	ev_printerr (const char *msg)
572	{	721	{
573	write (STDERR_FILENO, msg, strlen (msg));	722	write (STDERR_FILENO, msg, strlen (msg));
574	}	723	}
575	#endif	724	#endif
576		725
577	static void (syserr_cb)(const char msg);	726	static void (syserr_cb)(const char msg);
578		727
579	void	728	void ecb_cold
580	ev_set_syserr_cb (void (cb)(const char msg))	729	ev_set_syserr_cb (void (cb)(const char msg))
581	{	730	{
582	syserr_cb = cb;	731	syserr_cb = cb;
583	}	732	}
584		733
585	static void noinline	734	static void noinline ecb_cold
586	ev_syserr (const char *msg)	735	ev_syserr (const char *msg)
587	{	736	{
588	if (!msg)	737	if (!msg)
589	msg = "(libev) system error";	738	msg = "(libev) system error";
590		739
591	if (syserr_cb)	740	if (syserr_cb)
592	syserr_cb (msg);	741	syserr_cb (msg);
593	else	742	else
594	{	743	{
595	#if EV_AVOID_STDIO	744	#if EV_AVOID_STDIO
596	const char *err = strerror (errno);
597
598	ev_printerr (msg);	745	ev_printerr (msg);
599	ev_printerr (": ");	746	ev_printerr (": ");
600	ev_printerr (err);	747	ev_printerr (strerror (errno));
601	ev_printerr ("\n");	748	ev_printerr ("\n");
602	#else	749	#else
603	perror (msg);	750	perror (msg);
604	#endif	751	#endif
605	abort ();	752	abort ();
…		…
625	#endif	772	#endif
626	}	773	}
627		774
628	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	775	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
629		776
630	void	777	void ecb_cold
631	ev_set_allocator (void (cb)(void *ptr, long size))	778	ev_set_allocator (void (cb)(void *ptr, long size))
632	{	779	{
633	alloc = cb;	780	alloc = cb;
634	}	781	}
635		782
…		…
639	ptr = alloc (ptr, size);	786	ptr = alloc (ptr, size);
640		787
641	if (!ptr && size)	788	if (!ptr && size)
642	{	789	{
643	#if EV_AVOID_STDIO	790	#if EV_AVOID_STDIO
644	ev_printerr ("libev: memory allocation failed, aborting.\n");	791	ev_printerr ("(libev) memory allocation failed, aborting.\n");
645	#else	792	#else
646	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	793	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647	#endif	794	#endif
648	abort ();	795	abort ();
649	}	796	}
650		797
651	return ptr;	798	return ptr;
…		…
844	}	991	}
845		992
846	return ncur;	993	return ncur;
847	}	994	}
848		995
849	static noinline void *	996	static void * noinline ecb_cold
850	array_realloc (int elem, void base, int cur, int cnt)	997	array_realloc (int elem, void base, int cur, int cnt)
851	{	998	{
852	cur = array_nextsize (elem, cur, cnt);	999	cur = array_nextsize (elem, cur, cnt);
853	return ev_realloc (base, elem * *cur);	1000	return ev_realloc (base, elem * *cur);
854	}	1001	}
…		…
857	memset ((void )(base), 0, sizeof ((base)) * (count))	1004	memset ((void )(base), 0, sizeof ((base)) * (count))
858		1005
859	#define array_needsize(type,base,cur,cnt,init) \	1006	#define array_needsize(type,base,cur,cnt,init) \
860	if (expect_false ((cnt) > (cur))) \	1007	if (expect_false ((cnt) > (cur))) \
861	{ \	1008	{ \
862	int ocur_ = (cur); \	1009	int ecb_unused ocur_ = (cur); \
863	(base) = (type *)array_realloc \	1010	(base) = (type *)array_realloc \
864	(sizeof (type), (base), &(cur), (cnt)); \	1011	(sizeof (type), (base), &(cur), (cnt)); \
865	init ((base) + (ocur_), (cur) - ocur_); \	1012	init ((base) + (ocur_), (cur) - ocur_); \
866	}	1013	}
867		1014
…		…
967	inline_size void	1114	inline_size void
968	fd_reify (EV_P)	1115	fd_reify (EV_P)
969	{	1116	{
970	int i;	1117	int i;
971		1118
		1119	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1120	for (i = 0; i < fdchangecnt; ++i)
		1121	{
		1122	int fd = fdchanges [i];
		1123	ANFD *anfd = anfds + fd;
		1124
		1125	if (anfd->reify & EV__IOFDSET && anfd->head)
		1126	{
		1127	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1128
		1129	if (handle != anfd->handle)
		1130	{
		1131	unsigned long arg;
		1132
		1133	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1134
		1135	/* handle changed, but fd didn't - we need to do it in two steps */
		1136	backend_modify (EV_A_ fd, anfd->events, 0);
		1137	anfd->events = 0;
		1138	anfd->handle = handle;
		1139	}
		1140	}
		1141	}
		1142	#endif
		1143
972	for (i = 0; i < fdchangecnt; ++i)	1144	for (i = 0; i < fdchangecnt; ++i)
973	{	1145	{
974	int fd = fdchanges [i];	1146	int fd = fdchanges [i];
975	ANFD *anfd = anfds + fd;	1147	ANFD *anfd = anfds + fd;
976	ev_io *w;	1148	ev_io *w;
…		…
978	unsigned char o_events = anfd->events;	1150	unsigned char o_events = anfd->events;
979	unsigned char o_reify = anfd->reify;	1151	unsigned char o_reify = anfd->reify;
980		1152
981	anfd->reify = 0;	1153	anfd->reify = 0;
982		1154
983	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
984	if (o_reify & EV__IOFDSET)
985	{
986	unsigned long arg;
987	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989	printf ("oi %d %x\n", fd, anfd->handle);//D
990	}
991	#endif
992
993	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1155	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
994	{	1156	{
995	anfd->events = 0;	1157	anfd->events = 0;
996		1158
997	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1159	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1022	fdchanges [fdchangecnt - 1] = fd;	1184	fdchanges [fdchangecnt - 1] = fd;
1023	}	1185	}
1024	}	1186	}
1025		1187
1026	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1188	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027	inline_speed void	1189	inline_speed void ecb_cold
1028	fd_kill (EV_P_ int fd)	1190	fd_kill (EV_P_ int fd)
1029	{	1191	{
1030	ev_io *w;	1192	ev_io *w;
1031		1193
1032	while ((w = (ev_io *)anfds [fd].head))	1194	while ((w = (ev_io *)anfds [fd].head))
…		…
1035	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1197	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1036	}	1198	}
1037	}	1199	}
1038		1200
1039	/* check whether the given fd is actually valid, for error recovery */	1201	/* check whether the given fd is actually valid, for error recovery */
1040	inline_size int	1202	inline_size int ecb_cold
1041	fd_valid (int fd)	1203	fd_valid (int fd)
1042	{	1204	{
1043	#ifdef _WIN32	1205	#ifdef _WIN32
1044	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1206	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045	#else	1207	#else
1046	return fcntl (fd, F_GETFD) != -1;	1208	return fcntl (fd, F_GETFD) != -1;
1047	#endif	1209	#endif
1048	}	1210	}
1049		1211
1050	/* called on EBADF to verify fds */	1212	/* called on EBADF to verify fds */
1051	static void noinline	1213	static void noinline ecb_cold
1052	fd_ebadf (EV_P)	1214	fd_ebadf (EV_P)
1053	{	1215	{
1054	int fd;	1216	int fd;
1055		1217
1056	for (fd = 0; fd < anfdmax; ++fd)	1218	for (fd = 0; fd < anfdmax; ++fd)
…		…
1058	if (!fd_valid (fd) && errno == EBADF)	1220	if (!fd_valid (fd) && errno == EBADF)
1059	fd_kill (EV_A_ fd);	1221	fd_kill (EV_A_ fd);
1060	}	1222	}
1061		1223
1062	/* called on ENOMEM in select/poll to kill some fds and retry */	1224	/* called on ENOMEM in select/poll to kill some fds and retry */
1063	static void noinline	1225	static void noinline ecb_cold
1064	fd_enomem (EV_P)	1226	fd_enomem (EV_P)
1065	{	1227	{
1066	int fd;	1228	int fd;
1067		1229
1068	for (fd = anfdmax; fd--; )	1230	for (fd = anfdmax; fd--; )
…		…
1263		1425
1264	/*****************************************************************************/	1426	/*****************************************************************************/
1265		1427
1266	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1428	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1267		1429
1268	static void noinline	1430	static void noinline ecb_cold
1269	evpipe_init (EV_P)	1431	evpipe_init (EV_P)
1270	{	1432	{
1271	if (!ev_is_active (&pipe_w))	1433	if (!ev_is_active (&pipe_w))
1272	{	1434	{
1273	# if EV_USE_EVENTFD	1435	# if EV_USE_EVENTFD
…		…
1295	ev_io_start (EV_A_ &pipe_w);	1457	ev_io_start (EV_A_ &pipe_w);
1296	ev_unref (EV_A); /* watcher should not keep loop alive */	1458	ev_unref (EV_A); /* watcher should not keep loop alive */
1297	}	1459	}
1298	}	1460	}
1299		1461
1300	inline_size void	1462	inline_speed void
1301	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1463	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302	{	1464	{
1303	if (!*flag)	1465	if (expect_true (*flag))
		1466	return;
		1467
		1468	*flag = 1;
		1469
		1470	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1471
		1472	pipe_write_skipped = 1;
		1473
		1474	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1475
		1476	if (pipe_write_wanted)
1304	{	1477	{
		1478	int old_errno;
		1479
		1480	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1481
1305	int old_errno = errno; /* save errno because write might clobber it */	1482	old_errno = errno; /* save errno because write will clobber it */
1306	char dummy;
1307
1308	*flag = 1;
1309		1483
1310	#if EV_USE_EVENTFD	1484	#if EV_USE_EVENTFD
1311	if (evfd >= 0)	1485	if (evfd >= 0)
1312	{	1486	{
1313	uint64_t counter = 1;	1487	uint64_t counter = 1;
1314	write (evfd, &counter, sizeof (uint64_t));	1488	write (evfd, &counter, sizeof (uint64_t));
1315	}	1489	}
1316	else	1490	else
1317	#endif	1491	#endif
		1492	{
1318	/* win32 people keep sending patches that change this write() to send() */	1493	/* win32 people keep sending patches that change this write() to send() */
1319	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1494	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320	/* so when you think this write should be a send instead, please find out */	1495	/* so when you think this write should be a send instead, please find out */
1321	/* where your send() is from - it's definitely not the microsoft send, and */	1496	/* where your send() is from - it's definitely not the microsoft send, and */
1322	/* tell me. thank you. */	1497	/* tell me. thank you. */
1323	write (evpipe [1], &dummy, 1);	1498	write (evpipe [1], &(evpipe [1]), 1);
		1499	}
1324		1500
1325	errno = old_errno;	1501	errno = old_errno;
1326	}	1502	}
1327	}	1503	}
1328		1504
…		…
1331	static void	1507	static void
1332	pipecb (EV_P_ ev_io *iow, int revents)	1508	pipecb (EV_P_ ev_io *iow, int revents)
1333	{	1509	{
1334	int i;	1510	int i;
1335		1511
		1512	if (revents & EV_READ)
		1513	{
1336	#if EV_USE_EVENTFD	1514	#if EV_USE_EVENTFD
1337	if (evfd >= 0)	1515	if (evfd >= 0)
1338	{	1516	{
1339	uint64_t counter;	1517	uint64_t counter;
1340	read (evfd, &counter, sizeof (uint64_t));	1518	read (evfd, &counter, sizeof (uint64_t));
1341	}	1519	}
1342	else	1520	else
1343	#endif	1521	#endif
1344	{	1522	{
1345	char dummy;	1523	char dummy;
1346	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1524	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1347	read (evpipe [0], &dummy, 1);	1525	read (evpipe [0], &dummy, 1);
		1526	}
1348	}	1527	}
1349		1528
		1529	pipe_write_skipped = 0;
		1530
		1531	#if EV_SIGNAL_ENABLE
1350	if (sig_pending)	1532	if (sig_pending)
1351	{	1533	{
1352	sig_pending = 0;	1534	sig_pending = 0;
1353		1535
1354	for (i = EV_NSIG - 1; i--; )	1536	for (i = EV_NSIG - 1; i--; )
1355	if (expect_false (signals [i].pending))	1537	if (expect_false (signals [i].pending))
1356	ev_feed_signal_event (EV_A_ i + 1);	1538	ev_feed_signal_event (EV_A_ i + 1);
1357	}	1539	}
		1540	#endif
1358		1541
1359	#if EV_ASYNC_ENABLE	1542	#if EV_ASYNC_ENABLE
1360	if (async_pending)	1543	if (async_pending)
1361	{	1544	{
1362	async_pending = 0;	1545	async_pending = 0;
…		…
1371	#endif	1554	#endif
1372	}	1555	}
1373		1556
1374	/*****************************************************************************/	1557	/*****************************************************************************/
1375		1558
		1559	void
		1560	ev_feed_signal (int signum)
		1561	{
		1562	#if EV_MULTIPLICITY
		1563	EV_P = signals [signum - 1].loop;
		1564
		1565	if (!EV_A)
		1566	return;
		1567	#endif
		1568
		1569	if (!ev_active (&pipe_w))
		1570	return;
		1571
		1572	signals [signum - 1].pending = 1;
		1573	evpipe_write (EV_A_ &sig_pending);
		1574	}
		1575
1376	static void	1576	static void
1377	ev_sighandler (int signum)	1577	ev_sighandler (int signum)
1378	{	1578	{
1379	#if EV_MULTIPLICITY
1380	EV_P = signals [signum - 1].loop;
1381	#endif
1382
1383	#ifdef _WIN32	1579	#ifdef _WIN32
1384	signal (signum, ev_sighandler);	1580	signal (signum, ev_sighandler);
1385	#endif	1581	#endif
1386		1582
1387	signals [signum - 1].pending = 1;	1583	ev_feed_signal (signum);
1388	evpipe_write (EV_A_ &sig_pending);
1389	}	1584	}
1390		1585
1391	void noinline	1586	void noinline
1392	ev_feed_signal_event (EV_P_ int signum)	1587	ev_feed_signal_event (EV_P_ int signum)
1393	{	1588	{
…		…
1512	#endif	1707	#endif
1513	#if EV_USE_SELECT	1708	#if EV_USE_SELECT
1514	# include "ev_select.c"	1709	# include "ev_select.c"
1515	#endif	1710	#endif
1516		1711
1517	int	1712	int ecb_cold
1518	ev_version_major (void)	1713	ev_version_major (void)
1519	{	1714	{
1520	return EV_VERSION_MAJOR;	1715	return EV_VERSION_MAJOR;
1521	}	1716	}
1522		1717
1523	int	1718	int ecb_cold
1524	ev_version_minor (void)	1719	ev_version_minor (void)
1525	{	1720	{
1526	return EV_VERSION_MINOR;	1721	return EV_VERSION_MINOR;
1527	}	1722	}
1528		1723
1529	/* return true if we are running with elevated privileges and should ignore env variables */	1724	/* return true if we are running with elevated privileges and should ignore env variables */
1530	int inline_size	1725	int inline_size ecb_cold
1531	enable_secure (void)	1726	enable_secure (void)
1532	{	1727	{
1533	#ifdef _WIN32	1728	#ifdef _WIN32
1534	return 0;	1729	return 0;
1535	#else	1730	#else
1536	return getuid () != geteuid ()	1731	return getuid () != geteuid ()
1537	\|\| getgid () != getegid ();	1732	\|\| getgid () != getegid ();
1538	#endif	1733	#endif
1539	}	1734	}
1540		1735
1541	unsigned int	1736	unsigned int ecb_cold
1542	ev_supported_backends (void)	1737	ev_supported_backends (void)
1543	{	1738	{
1544	unsigned int flags = 0;	1739	unsigned int flags = 0;
1545		1740
1546	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1741	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1550	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1745	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1551		1746
1552	return flags;	1747	return flags;
1553	}	1748	}
1554		1749
1555	unsigned int	1750	unsigned int ecb_cold
1556	ev_recommended_backends (void)	1751	ev_recommended_backends (void)
1557	{	1752	{
1558	unsigned int flags = ev_supported_backends ();	1753	unsigned int flags = ev_supported_backends ();
1559		1754
1560	#ifndef __NetBSD__	1755	#ifndef __NetBSD__
…		…
1572	#endif	1767	#endif
1573		1768
1574	return flags;	1769	return flags;
1575	}	1770	}
1576		1771
1577	unsigned int	1772	unsigned int ecb_cold
1578	ev_embeddable_backends (void)	1773	ev_embeddable_backends (void)
1579	{	1774	{
1580	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1775	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1581		1776
1582	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1777	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1627	ev_userdata (EV_P)	1822	ev_userdata (EV_P)
1628	{	1823	{
1629	return userdata;	1824	return userdata;
1630	}	1825	}
1631		1826
		1827	void
1632	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1828	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633	{	1829	{
1634	invoke_cb = invoke_pending_cb;	1830	invoke_cb = invoke_pending_cb;
1635	}	1831	}
1636		1832
		1833	void
1637	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1834	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1638	{	1835	{
1639	release_cb = release;	1836	release_cb = release;
1640	acquire_cb = acquire;	1837	acquire_cb = acquire;
1641	}	1838	}
1642	#endif	1839	#endif
1643		1840
1644	/* initialise a loop structure, must be zero-initialised */	1841	/* initialise a loop structure, must be zero-initialised */
1645	static void noinline	1842	static void noinline ecb_cold
1646	loop_init (EV_P_ unsigned int flags)	1843	loop_init (EV_P_ unsigned int flags)
1647	{	1844	{
1648	if (!backend)	1845	if (!backend)
1649	{	1846	{
		1847	origflags = flags;
		1848
1650	#if EV_USE_REALTIME	1849	#if EV_USE_REALTIME
1651	if (!have_realtime)	1850	if (!have_realtime)
1652	{	1851	{
1653	struct timespec ts;	1852	struct timespec ts;
1654		1853
…		…
1676	if (!(flags & EVFLAG_NOENV)	1875	if (!(flags & EVFLAG_NOENV)
1677	&& !enable_secure ()	1876	&& !enable_secure ()
1678	&& getenv ("LIBEV_FLAGS"))	1877	&& getenv ("LIBEV_FLAGS"))
1679	flags = atoi (getenv ("LIBEV_FLAGS"));	1878	flags = atoi (getenv ("LIBEV_FLAGS"));
1680		1879
1681	ev_rt_now = ev_time ();	1880	ev_rt_now = ev_time ();
1682	mn_now = get_clock ();	1881	mn_now = get_clock ();
1683	now_floor = mn_now;	1882	now_floor = mn_now;
1684	rtmn_diff = ev_rt_now - mn_now;	1883	rtmn_diff = ev_rt_now - mn_now;
1685	#if EV_FEATURE_API	1884	#if EV_FEATURE_API
1686	invoke_cb = ev_invoke_pending;	1885	invoke_cb = ev_invoke_pending;
1687	#endif	1886	#endif
1688		1887
1689	io_blocktime = 0.;	1888	io_blocktime = 0.;
1690	timeout_blocktime = 0.;	1889	timeout_blocktime = 0.;
1691	backend = 0;	1890	backend = 0;
1692	backend_fd = -1;	1891	backend_fd = -1;
1693	sig_pending = 0;	1892	sig_pending = 0;
1694	#if EV_ASYNC_ENABLE	1893	#if EV_ASYNC_ENABLE
1695	async_pending = 0;	1894	async_pending = 0;
1696	#endif	1895	#endif
		1896	pipe_write_skipped = 0;
		1897	pipe_write_wanted = 0;
1697	#if EV_USE_INOTIFY	1898	#if EV_USE_INOTIFY
1698	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1899	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699	#endif	1900	#endif
1700	#if EV_USE_SIGNALFD	1901	#if EV_USE_SIGNALFD
1701	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1902	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702	#endif	1903	#endif
1703		1904
1704	if (!(flags & 0x0000ffffU))	1905	if (!(flags & EVBACKEND_MASK))
1705	flags \|= ev_recommended_backends ();	1906	flags \|= ev_recommended_backends ();
1706		1907
1707	#if EV_USE_IOCP	1908	#if EV_USE_IOCP
1708	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);	1909	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709	#endif	1910	#endif
…		…
1731	#endif	1932	#endif
1732	}	1933	}
1733	}	1934	}
1734		1935
1735	/* free up a loop structure */	1936	/* free up a loop structure */
1736	void	1937	void ecb_cold
1737	ev_loop_destroy (EV_P)	1938	ev_loop_destroy (EV_P)
1738	{	1939	{
1739	int i;	1940	int i;
1740		1941
1741	#if EV_MULTIPLICITY	1942	#if EV_MULTIPLICITY
…		…
1871	infy_fork (EV_A);	2072	infy_fork (EV_A);
1872	#endif	2073	#endif
1873		2074
1874	if (ev_is_active (&pipe_w))	2075	if (ev_is_active (&pipe_w))
1875	{	2076	{
1876	/* this "locks" the handlers against writing to the pipe */	2077	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1877	/* while we modify the fd vars */
1878	sig_pending = 1;
1879	#if EV_ASYNC_ENABLE
1880	async_pending = 1;
1881	#endif
1882		2078
1883	ev_ref (EV_A);	2079	ev_ref (EV_A);
1884	ev_io_stop (EV_A_ &pipe_w);	2080	ev_io_stop (EV_A_ &pipe_w);
1885		2081
1886	#if EV_USE_EVENTFD	2082	#if EV_USE_EVENTFD
…		…
1904	postfork = 0;	2100	postfork = 0;
1905	}	2101	}
1906		2102
1907	#if EV_MULTIPLICITY	2103	#if EV_MULTIPLICITY
1908		2104
1909	struct ev_loop *	2105	struct ev_loop * ecb_cold
1910	ev_loop_new (unsigned int flags)	2106	ev_loop_new (unsigned int flags)
1911	{	2107	{
1912	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2108	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1913		2109
1914	memset (EV_A, 0, sizeof (struct ev_loop));	2110	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1922	}	2118	}
1923		2119
1924	#endif /* multiplicity */	2120	#endif /* multiplicity */
1925		2121
1926	#if EV_VERIFY	2122	#if EV_VERIFY
1927	static void noinline	2123	static void noinline ecb_cold
1928	verify_watcher (EV_P_ W w)	2124	verify_watcher (EV_P_ W w)
1929	{	2125	{
1930	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2126	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1931		2127
1932	if (w->pending)	2128	if (w->pending)
1933	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2129	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1934	}	2130	}
1935		2131
1936	static void noinline	2132	static void noinline ecb_cold
1937	verify_heap (EV_P_ ANHE *heap, int N)	2133	verify_heap (EV_P_ ANHE *heap, int N)
1938	{	2134	{
1939	int i;	2135	int i;
1940		2136
1941	for (i = HEAP0; i < N + HEAP0; ++i)	2137	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1946		2142
1947	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2143	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1948	}	2144	}
1949	}	2145	}
1950		2146
1951	static void noinline	2147	static void noinline ecb_cold
1952	array_verify (EV_P_ W *ws, int cnt)	2148	array_verify (EV_P_ W *ws, int cnt)
1953	{	2149	{
1954	while (cnt--)	2150	while (cnt--)
1955	{	2151	{
1956	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2152	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1958	}	2154	}
1959	}	2155	}
1960	#endif	2156	#endif
1961		2157
1962	#if EV_FEATURE_API	2158	#if EV_FEATURE_API
1963	void	2159	void ecb_cold
1964	ev_verify (EV_P)	2160	ev_verify (EV_P)
1965	{	2161	{
1966	#if EV_VERIFY	2162	#if EV_VERIFY
1967	int i;	2163	int i;
1968	WL w;	2164	WL w;
…		…
2034	#endif	2230	#endif
2035	}	2231	}
2036	#endif	2232	#endif
2037		2233
2038	#if EV_MULTIPLICITY	2234	#if EV_MULTIPLICITY
2039	struct ev_loop *	2235	struct ev_loop * ecb_cold
2040	#else	2236	#else
2041	int	2237	int
2042	#endif	2238	#endif
2043	ev_default_loop (unsigned int flags)	2239	ev_default_loop (unsigned int flags)
2044	{	2240	{
…		…
2102	for (pri = NUMPRI; pri--; )	2298	for (pri = NUMPRI; pri--; )
2103	while (pendingcnt [pri])	2299	while (pendingcnt [pri])
2104	{	2300	{
2105	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2301	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2106		2302
2107	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2108	/* ^ this is no longer true, as pending_w could be here */
2109
2110	p->w->pending = 0;	2303	p->w->pending = 0;
2111	EV_CB_INVOKE (p->w, p->events);	2304	EV_CB_INVOKE (p->w, p->events);
2112	EV_FREQUENT_CHECK;	2305	EV_FREQUENT_CHECK;
2113	}	2306	}
2114	}	2307	}
…		…
2175	feed_reverse_done (EV_A_ EV_TIMER);	2368	feed_reverse_done (EV_A_ EV_TIMER);
2176	}	2369	}
2177	}	2370	}
2178		2371
2179	#if EV_PERIODIC_ENABLE	2372	#if EV_PERIODIC_ENABLE
		2373
		2374	static void noinline
		2375	periodic_recalc (EV_P_ ev_periodic *w)
		2376	{
		2377	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2378	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2379
		2380	/* the above almost always errs on the low side */
		2381	while (at <= ev_rt_now)
		2382	{
		2383	ev_tstamp nat = at + w->interval;
		2384
		2385	/* when resolution fails us, we use ev_rt_now */
		2386	if (expect_false (nat == at))
		2387	{
		2388	at = ev_rt_now;
		2389	break;
		2390	}
		2391
		2392	at = nat;
		2393	}
		2394
		2395	ev_at (w) = at;
		2396	}
		2397
2180	/* make periodics pending */	2398	/* make periodics pending */
2181	inline_size void	2399	inline_size void
2182	periodics_reify (EV_P)	2400	periodics_reify (EV_P)
2183	{	2401	{
2184	EV_FREQUENT_CHECK;	2402	EV_FREQUENT_CHECK;
…		…
2203	ANHE_at_cache (periodics [HEAP0]);	2421	ANHE_at_cache (periodics [HEAP0]);
2204	downheap (periodics, periodiccnt, HEAP0);	2422	downheap (periodics, periodiccnt, HEAP0);
2205	}	2423	}
2206	else if (w->interval)	2424	else if (w->interval)
2207	{	2425	{
2208	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2426	periodic_recalc (EV_A_ w);
2209	/* if next trigger time is not sufficiently in the future, put it there */
2210	/* this might happen because of floating point inexactness */
2211	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2212	{
2213	ev_at (w) += w->interval;
2214
2215	/* if interval is unreasonably low we might still have a time in the past */
2216	/* so correct this. this will make the periodic very inexact, but the user */
2217	/* has effectively asked to get triggered more often than possible */
2218	if (ev_at (w) < ev_rt_now)
2219	ev_at (w) = ev_rt_now;
2220	}
2221
2222	ANHE_at_cache (periodics [HEAP0]);	2427	ANHE_at_cache (periodics [HEAP0]);
2223	downheap (periodics, periodiccnt, HEAP0);	2428	downheap (periodics, periodiccnt, HEAP0);
2224	}	2429	}
2225	else	2430	else
2226	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2431	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2234	}	2439	}
2235	}	2440	}
2236		2441
2237	/* simply recalculate all periodics */	2442	/* simply recalculate all periodics */
2238	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2443	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2239	static void noinline	2444	static void noinline ecb_cold
2240	periodics_reschedule (EV_P)	2445	periodics_reschedule (EV_P)
2241	{	2446	{
2242	int i;	2447	int i;
2243		2448
2244	/* adjust periodics after time jump */	2449	/* adjust periodics after time jump */
…		…
2247	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2452	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2248		2453
2249	if (w->reschedule_cb)	2454	if (w->reschedule_cb)
2250	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2455	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251	else if (w->interval)	2456	else if (w->interval)
2252	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2457	periodic_recalc (EV_A_ w);
2253		2458
2254	ANHE_at_cache (periodics [i]);	2459	ANHE_at_cache (periodics [i]);
2255	}	2460	}
2256		2461
2257	reheap (periodics, periodiccnt);	2462	reheap (periodics, periodiccnt);
2258	}	2463	}
2259	#endif	2464	#endif
2260		2465
2261	/* adjust all timers by a given offset */	2466	/* adjust all timers by a given offset */
2262	static void noinline	2467	static void noinline ecb_cold
2263	timers_reschedule (EV_P_ ev_tstamp adjust)	2468	timers_reschedule (EV_P_ ev_tstamp adjust)
2264	{	2469	{
2265	int i;	2470	int i;
2266		2471
2267	for (i = 0; i < timercnt; ++i)	2472	for (i = 0; i < timercnt; ++i)
…		…
2304	* doesn't hurt either as we only do this on time-jumps or	2509	* doesn't hurt either as we only do this on time-jumps or
2305	* in the unlikely event of having been preempted here.	2510	* in the unlikely event of having been preempted here.
2306	*/	2511	*/
2307	for (i = 4; --i; )	2512	for (i = 4; --i; )
2308	{	2513	{
		2514	ev_tstamp diff;
2309	rtmn_diff = ev_rt_now - mn_now;	2515	rtmn_diff = ev_rt_now - mn_now;
2310		2516
		2517	diff = odiff - rtmn_diff;
		2518
2311	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2519	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2312	return; /* all is well */	2520	return; /* all is well */
2313		2521
2314	ev_rt_now = ev_time ();	2522	ev_rt_now = ev_time ();
2315	mn_now = get_clock ();	2523	mn_now = get_clock ();
2316	now_floor = mn_now;	2524	now_floor = mn_now;
…		…
2406	ev_tstamp prev_mn_now = mn_now;	2614	ev_tstamp prev_mn_now = mn_now;
2407		2615
2408	/* update time to cancel out callback processing overhead */	2616	/* update time to cancel out callback processing overhead */
2409	time_update (EV_A_ 1e100);	2617	time_update (EV_A_ 1e100);
2410		2618
		2619	/* from now on, we want a pipe-wake-up */
		2620	pipe_write_wanted = 1;
		2621
		2622	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2623
2411	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2624	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2412	{	2625	{
2413	waittime = MAX_BLOCKTIME;	2626	waittime = MAX_BLOCKTIME;
2414		2627
2415	if (timercnt)	2628	if (timercnt)
2416	{	2629	{
2417	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2630	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2418	if (waittime > to) waittime = to;	2631	if (waittime > to) waittime = to;
2419	}	2632	}
2420		2633
2421	#if EV_PERIODIC_ENABLE	2634	#if EV_PERIODIC_ENABLE
2422	if (periodiccnt)	2635	if (periodiccnt)
2423	{	2636	{
2424	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2637	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2425	if (waittime > to) waittime = to;	2638	if (waittime > to) waittime = to;
2426	}	2639	}
2427	#endif	2640	#endif
2428		2641
2429	/* don't let timeouts decrease the waittime below timeout_blocktime */	2642	/* don't let timeouts decrease the waittime below timeout_blocktime */
2430	if (expect_false (waittime < timeout_blocktime))	2643	if (expect_false (waittime < timeout_blocktime))
2431	waittime = timeout_blocktime;	2644	waittime = timeout_blocktime;
		2645
		2646	/* at this point, we NEED to wait, so we have to ensure */
		2647	/* to pass a minimum nonzero value to the backend */
		2648	if (expect_false (waittime < backend_mintime))
		2649	waittime = backend_mintime;
2432		2650
2433	/* extra check because io_blocktime is commonly 0 */	2651	/* extra check because io_blocktime is commonly 0 */
2434	if (expect_false (io_blocktime))	2652	if (expect_false (io_blocktime))
2435	{	2653	{
2436	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2654	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2437		2655
2438	if (sleeptime > waittime - backend_fudge)	2656	if (sleeptime > waittime - backend_mintime)
2439	sleeptime = waittime - backend_fudge;	2657	sleeptime = waittime - backend_mintime;
2440		2658
2441	if (expect_true (sleeptime > 0.))	2659	if (expect_true (sleeptime > 0.))
2442	{	2660	{
2443	ev_sleep (sleeptime);	2661	ev_sleep (sleeptime);
2444	waittime -= sleeptime;	2662	waittime -= sleeptime;
…		…
2450	++loop_count;	2668	++loop_count;
2451	#endif	2669	#endif
2452	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2670	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2453	backend_poll (EV_A_ waittime);	2671	backend_poll (EV_A_ waittime);
2454	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2672	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2673
		2674	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2675
		2676	if (pipe_write_skipped)
		2677	{
		2678	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2679	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2680	}
		2681
2455		2682
2456	/* update ev_rt_now, do magic */	2683	/* update ev_rt_now, do magic */
2457	time_update (EV_A_ waittime + sleeptime);	2684	time_update (EV_A_ waittime + sleeptime);
2458	}	2685	}
2459		2686
…		…
2749	if (w->reschedule_cb)	2976	if (w->reschedule_cb)
2750	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2977	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2751	else if (w->interval)	2978	else if (w->interval)
2752	{	2979	{
2753	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2980	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2754	/* this formula differs from the one in periodic_reify because we do not always round up */	2981	periodic_recalc (EV_A_ w);
2755	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2756	}	2982	}
2757	else	2983	else
2758	ev_at (w) = w->offset;	2984	ev_at (w) = w->offset;
2759		2985
2760	EV_FREQUENT_CHECK;	2986	EV_FREQUENT_CHECK;
…		…
2881	sa.sa_handler = ev_sighandler;	3107	sa.sa_handler = ev_sighandler;
2882	sigfillset (&sa.sa_mask);	3108	sigfillset (&sa.sa_mask);
2883	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2884	sigaction (w->signum, &sa, 0);	3110	sigaction (w->signum, &sa, 0);
2885		3111
		3112	if (origflags & EVFLAG_NOSIGMASK)
		3113	{
2886	sigemptyset (&sa.sa_mask);	3114	sigemptyset (&sa.sa_mask);
2887	sigaddset (&sa.sa_mask, w->signum);	3115	sigaddset (&sa.sa_mask, w->signum);
2888	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3116	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3117	}
2889	#endif	3118	#endif
2890	}	3119	}
2891		3120
2892	EV_FREQUENT_CHECK;	3121	EV_FREQUENT_CHECK;
2893	}	3122	}
…		…
3034	if (!pend \|\| pend == path)	3263	if (!pend \|\| pend == path)
3035	break;	3264	break;
3036		3265
3037	*pend = 0;	3266	*pend = 0;
3038	w->wd = inotify_add_watch (fs_fd, path, mask);	3267	w->wd = inotify_add_watch (fs_fd, path, mask);
3039	}	3268	}
3040	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3269	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3041	}	3270	}
3042	}	3271	}
3043		3272
3044	if (w->wd >= 0)	3273	if (w->wd >= 0)
…		…
3111	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3340	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3112	ofs += sizeof (struct inotify_event) + ev->len;	3341	ofs += sizeof (struct inotify_event) + ev->len;
3113	}	3342	}
3114	}	3343	}
3115		3344
3116	inline_size void	3345	inline_size void ecb_cold
3117	ev_check_2625 (EV_P)	3346	ev_check_2625 (EV_P)
3118	{	3347	{
3119	/* kernels < 2.6.25 are borked	3348	/* kernels < 2.6.25 are borked
3120	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3349	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3121	*/	3350	*/
…		…
3746	}	3975	}
3747		3976
3748	/*****************************************************************************/	3977	/*****************************************************************************/
3749		3978
3750	#if EV_WALK_ENABLE	3979	#if EV_WALK_ENABLE
3751	void	3980	void ecb_cold
3752	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3981	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3753	{	3982	{
3754	int i, j;	3983	int i, j;
3755	ev_watcher_list wl, wn;	3984	ev_watcher_list wl, wn;
3756		3985

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Comparing libev/ev.c (file contents): Revision 1.364 by root, Sun Oct 24 21:51:03 2010 UTC vs. Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.364 by root, Sun Oct 24 21:51:03 2010 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC