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

Comparing libev/ev.c (file contents):
Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC vs.
Revision 1.386 by root, Wed Jul 20 01:04:20 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
		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 defined(_WIN32) && defined(MemoryBarrier)
		517	#define ECB_MEMORY_FENCE MemoryBarrier ()
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#endif
		521	#endif
		522
		523	#ifndef ECB_MEMORY_FENCE
		524	#include <pthread.h>
		525
		526	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		527	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		528	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		529	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		530	#endif
		531
		532	#if ECB_GCC_VERSION(3,1)
		533	#define ecb_attribute(attrlist) __attribute__(attrlist)
		534	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		535	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		536	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		537	#else
		538	#define ecb_attribute(attrlist)
		539	#define ecb_is_constant(expr) 0
		540	#define ecb_expect(expr,value) (expr)
		541	#define ecb_prefetch(addr,rw,locality)
		542	#endif
		543
		544	#define ecb_noinline ecb_attribute ((__noinline__))
		545	#define ecb_noreturn ecb_attribute ((__noreturn__))
		546	#define ecb_unused ecb_attribute ((__unused__))
		547	#define ecb_const ecb_attribute ((__const__))
		548	#define ecb_pure ecb_attribute ((__pure__))
		549
		550	#if ECB_GCC_VERSION(4,3)
		551	#define ecb_artificial ecb_attribute ((__artificial__))
		552	#define ecb_hot ecb_attribute ((__hot__))
		553	#define ecb_cold ecb_attribute ((__cold__))
		554	#else
		555	#define ecb_artificial
		556	#define ecb_hot
		557	#define ecb_cold
		558	#endif
		559
		560	/* put around conditional expressions if you are very sure that the */
		561	/* expression is mostly true or mostly false. note that these return */
		562	/* booleans, not the expression. */
473	#define expect_false(expr) expect ((expr) != 0, 0)	563	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474	#define expect_true(expr) expect ((expr) != 0, 1)	564	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		565	/* ecb.h end */
		566
		567	#define expect_false(cond) ecb_expect_false (cond)
		568	#define expect_true(cond) ecb_expect_true (cond)
		569	#define noinline ecb_noinline
		570
475	#define inline_size static inline	571	#define inline_size ecb_inline
476		572
477	#if EV_FEATURE_CODE	573	#if EV_FEATURE_CODE
478	# define inline_speed static inline	574	# define inline_speed ecb_inline
479	#else	575	#else
480	# define inline_speed static noinline	576	# define inline_speed static noinline
481	#endif	577	#endif
482		578
483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	579	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
522	# include "ev_win32.c"	618	# include "ev_win32.c"
523	#endif	619	#endif
524		620
525	/*****************************************************************************/	621	/*****************************************************************************/
526		622
		623	/* define a suitable floor function (only used by periodics atm) */
		624
		625	#if EV_USE_FLOOR
		626	# include <math.h>
		627	# define ev_floor(v) floor (v)
		628	#else
		629
		630	#include <float.h>
		631
		632	/* a floor() replacement function, should be independent of ev_tstamp type */
		633	static ev_tstamp noinline
		634	ev_floor (ev_tstamp v)
		635	{
		636	/* the choice of shift factor is not terribly important */
		637	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		638	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		639	#else
		640	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		641	#endif
		642
		643	/* argument too large for an unsigned long? */
		644	if (expect_false (v >= shift))
		645	{
		646	ev_tstamp f;
		647
		648	if (v == v - 1.)
		649	return v; /* very large number */
		650
		651	f = shift * ev_floor (v * (1. / shift));
		652	return f + ev_floor (v - f);
		653	}
		654
		655	/* special treatment for negative args? */
		656	if (expect_false (v < 0.))
		657	{
		658	ev_tstamp f = -ev_floor (-v);
		659
		660	return f - (f == v ? 0 : 1);
		661	}
		662
		663	/* fits into an unsigned long */
		664	return (unsigned long)v;
		665	}
		666
		667	#endif
		668
		669	/*****************************************************************************/
		670
527	#ifdef __linux	671	#ifdef __linux
528	# include <sys/utsname.h>	672	# include <sys/utsname.h>
529	#endif	673	#endif
530		674
531	static unsigned int noinline	675	static unsigned int noinline ecb_cold
532	ev_linux_version (void)	676	ev_linux_version (void)
533	{	677	{
534	#ifdef __linux	678	#ifdef __linux
535	unsigned int v = 0;	679	unsigned int v = 0;
536	struct utsname buf;	680	struct utsname buf;
…		…
565	}	709	}
566		710
567	/*****************************************************************************/	711	/*****************************************************************************/
568		712
569	#if EV_AVOID_STDIO	713	#if EV_AVOID_STDIO
570	static void noinline	714	static void noinline ecb_cold
571	ev_printerr (const char *msg)	715	ev_printerr (const char *msg)
572	{	716	{
573	write (STDERR_FILENO, msg, strlen (msg));	717	write (STDERR_FILENO, msg, strlen (msg));
574	}	718	}
575	#endif	719	#endif
576		720
577	static void (syserr_cb)(const char msg);	721	static void (syserr_cb)(const char msg);
578		722
579	void	723	void ecb_cold
580	ev_set_syserr_cb (void (cb)(const char msg))	724	ev_set_syserr_cb (void (cb)(const char msg))
581	{	725	{
582	syserr_cb = cb;	726	syserr_cb = cb;
583	}	727	}
584		728
585	static void noinline	729	static void noinline ecb_cold
586	ev_syserr (const char *msg)	730	ev_syserr (const char *msg)
587	{	731	{
588	if (!msg)	732	if (!msg)
589	msg = "(libev) system error";	733	msg = "(libev) system error";
590		734
591	if (syserr_cb)	735	if (syserr_cb)
592	syserr_cb (msg);	736	syserr_cb (msg);
593	else	737	else
594	{	738	{
595	#if EV_AVOID_STDIO	739	#if EV_AVOID_STDIO
596	const char *err = strerror (errno);
597
598	ev_printerr (msg);	740	ev_printerr (msg);
599	ev_printerr (": ");	741	ev_printerr (": ");
600	ev_printerr (err);	742	ev_printerr (strerror (errno));
601	ev_printerr ("\n");	743	ev_printerr ("\n");
602	#else	744	#else
603	perror (msg);	745	perror (msg);
604	#endif	746	#endif
605	abort ();	747	abort ();
…		…
625	#endif	767	#endif
626	}	768	}
627		769
628	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	770	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
629		771
630	void	772	void ecb_cold
631	ev_set_allocator (void (cb)(void *ptr, long size))	773	ev_set_allocator (void (cb)(void *ptr, long size))
632	{	774	{
633	alloc = cb;	775	alloc = cb;
634	}	776	}
635		777
…		…
639	ptr = alloc (ptr, size);	781	ptr = alloc (ptr, size);
640		782
641	if (!ptr && size)	783	if (!ptr && size)
642	{	784	{
643	#if EV_AVOID_STDIO	785	#if EV_AVOID_STDIO
644	ev_printerr ("libev: memory allocation failed, aborting.\n");	786	ev_printerr ("(libev) memory allocation failed, aborting.\n");
645	#else	787	#else
646	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	788	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647	#endif	789	#endif
648	abort ();	790	abort ();
649	}	791	}
650		792
651	return ptr;	793	return ptr;
…		…
844	}	986	}
845		987
846	return ncur;	988	return ncur;
847	}	989	}
848		990
849	static noinline void *	991	static void * noinline ecb_cold
850	array_realloc (int elem, void base, int cur, int cnt)	992	array_realloc (int elem, void base, int cur, int cnt)
851	{	993	{
852	cur = array_nextsize (elem, cur, cnt);	994	cur = array_nextsize (elem, cur, cnt);
853	return ev_realloc (base, elem * *cur);	995	return ev_realloc (base, elem * *cur);
854	}	996	}
…		…
857	memset ((void )(base), 0, sizeof ((base)) * (count))	999	memset ((void )(base), 0, sizeof ((base)) * (count))
858		1000
859	#define array_needsize(type,base,cur,cnt,init) \	1001	#define array_needsize(type,base,cur,cnt,init) \
860	if (expect_false ((cnt) > (cur))) \	1002	if (expect_false ((cnt) > (cur))) \
861	{ \	1003	{ \
862	int ocur_ = (cur); \	1004	int ecb_unused ocur_ = (cur); \
863	(base) = (type *)array_realloc \	1005	(base) = (type *)array_realloc \
864	(sizeof (type), (base), &(cur), (cnt)); \	1006	(sizeof (type), (base), &(cur), (cnt)); \
865	init ((base) + (ocur_), (cur) - ocur_); \	1007	init ((base) + (ocur_), (cur) - ocur_); \
866	}	1008	}
867		1009
…		…
967	inline_size void	1109	inline_size void
968	fd_reify (EV_P)	1110	fd_reify (EV_P)
969	{	1111	{
970	int i;	1112	int i;
971		1113
		1114	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1115	for (i = 0; i < fdchangecnt; ++i)
		1116	{
		1117	int fd = fdchanges [i];
		1118	ANFD *anfd = anfds + fd;
		1119
		1120	if (anfd->reify & EV__IOFDSET && anfd->head)
		1121	{
		1122	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1123
		1124	if (handle != anfd->handle)
		1125	{
		1126	unsigned long arg;
		1127
		1128	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1129
		1130	/* handle changed, but fd didn't - we need to do it in two steps */
		1131	backend_modify (EV_A_ fd, anfd->events, 0);
		1132	anfd->events = 0;
		1133	anfd->handle = handle;
		1134	}
		1135	}
		1136	}
		1137	#endif
		1138
972	for (i = 0; i < fdchangecnt; ++i)	1139	for (i = 0; i < fdchangecnt; ++i)
973	{	1140	{
974	int fd = fdchanges [i];	1141	int fd = fdchanges [i];
975	ANFD *anfd = anfds + fd;	1142	ANFD *anfd = anfds + fd;
976	ev_io *w;	1143	ev_io *w;
…		…
978	unsigned char o_events = anfd->events;	1145	unsigned char o_events = anfd->events;
979	unsigned char o_reify = anfd->reify;	1146	unsigned char o_reify = anfd->reify;
980		1147
981	anfd->reify = 0;	1148	anfd->reify = 0;
982		1149
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 /	1150	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
994	{	1151	{
995	anfd->events = 0;	1152	anfd->events = 0;
996		1153
997	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1154	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1022	fdchanges [fdchangecnt - 1] = fd;	1179	fdchanges [fdchangecnt - 1] = fd;
1023	}	1180	}
1024	}	1181	}
1025		1182
1026	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1183	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027	inline_speed void	1184	inline_speed void ecb_cold
1028	fd_kill (EV_P_ int fd)	1185	fd_kill (EV_P_ int fd)
1029	{	1186	{
1030	ev_io *w;	1187	ev_io *w;
1031		1188
1032	while ((w = (ev_io *)anfds [fd].head))	1189	while ((w = (ev_io *)anfds [fd].head))
…		…
1035	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1192	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1036	}	1193	}
1037	}	1194	}
1038		1195
1039	/* check whether the given fd is actually valid, for error recovery */	1196	/* check whether the given fd is actually valid, for error recovery */
1040	inline_size int	1197	inline_size int ecb_cold
1041	fd_valid (int fd)	1198	fd_valid (int fd)
1042	{	1199	{
1043	#ifdef _WIN32	1200	#ifdef _WIN32
1044	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1201	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045	#else	1202	#else
1046	return fcntl (fd, F_GETFD) != -1;	1203	return fcntl (fd, F_GETFD) != -1;
1047	#endif	1204	#endif
1048	}	1205	}
1049		1206
1050	/* called on EBADF to verify fds */	1207	/* called on EBADF to verify fds */
1051	static void noinline	1208	static void noinline ecb_cold
1052	fd_ebadf (EV_P)	1209	fd_ebadf (EV_P)
1053	{	1210	{
1054	int fd;	1211	int fd;
1055		1212
1056	for (fd = 0; fd < anfdmax; ++fd)	1213	for (fd = 0; fd < anfdmax; ++fd)
…		…
1058	if (!fd_valid (fd) && errno == EBADF)	1215	if (!fd_valid (fd) && errno == EBADF)
1059	fd_kill (EV_A_ fd);	1216	fd_kill (EV_A_ fd);
1060	}	1217	}
1061		1218
1062	/* called on ENOMEM in select/poll to kill some fds and retry */	1219	/* called on ENOMEM in select/poll to kill some fds and retry */
1063	static void noinline	1220	static void noinline ecb_cold
1064	fd_enomem (EV_P)	1221	fd_enomem (EV_P)
1065	{	1222	{
1066	int fd;	1223	int fd;
1067		1224
1068	for (fd = anfdmax; fd--; )	1225	for (fd = anfdmax; fd--; )
…		…
1263		1420
1264	/*****************************************************************************/	1421	/*****************************************************************************/
1265		1422
1266	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1423	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1267		1424
1268	static void noinline	1425	static void noinline ecb_cold
1269	evpipe_init (EV_P)	1426	evpipe_init (EV_P)
1270	{	1427	{
1271	if (!ev_is_active (&pipe_w))	1428	if (!ev_is_active (&pipe_w))
1272	{	1429	{
1273	# if EV_USE_EVENTFD	1430	# if EV_USE_EVENTFD
…		…
1295	ev_io_start (EV_A_ &pipe_w);	1452	ev_io_start (EV_A_ &pipe_w);
1296	ev_unref (EV_A); /* watcher should not keep loop alive */	1453	ev_unref (EV_A); /* watcher should not keep loop alive */
1297	}	1454	}
1298	}	1455	}
1299		1456
1300	inline_size void	1457	inline_speed void
1301	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1458	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302	{	1459	{
1303	if (!*flag)	1460	if (expect_true (*flag))
		1461	/return//D/;
		1462
		1463	*flag = 1;
		1464
		1465	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1466
		1467	pipe_write_skipped = 1;
		1468
		1469	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1470
		1471	if (pipe_write_wanted)
1304	{	1472	{
		1473	int old_errno;
		1474
		1475	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1476
1305	int old_errno = errno; /* save errno because write might clobber it */	1477	old_errno = errno; /* save errno because write will clobber it */
1306	char dummy;
1307
1308	*flag = 1;
1309		1478
1310	#if EV_USE_EVENTFD	1479	#if EV_USE_EVENTFD
1311	if (evfd >= 0)	1480	if (evfd >= 0)
1312	{	1481	{
1313	uint64_t counter = 1;	1482	uint64_t counter = 1;
1314	write (evfd, &counter, sizeof (uint64_t));	1483	write (evfd, &counter, sizeof (uint64_t));
1315	}	1484	}
1316	else	1485	else
1317	#endif	1486	#endif
		1487	{
1318	/* win32 people keep sending patches that change this write() to send() */	1488	/* 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 */	1489	/* 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 */	1490	/* 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 */	1491	/* where your send() is from - it's definitely not the microsoft send, and */
1322	/* tell me. thank you. */	1492	/* tell me. thank you. */
1323	write (evpipe [1], &dummy, 1);	1493	write (evpipe [1], &(evpipe [1]), 1);
		1494	}
1324		1495
1325	errno = old_errno;	1496	errno = old_errno;
1326	}	1497	}
1327	}	1498	}
1328		1499
…		…
1331	static void	1502	static void
1332	pipecb (EV_P_ ev_io *iow, int revents)	1503	pipecb (EV_P_ ev_io *iow, int revents)
1333	{	1504	{
1334	int i;	1505	int i;
1335		1506
		1507	if (revents & EV_READ)
		1508	{
1336	#if EV_USE_EVENTFD	1509	#if EV_USE_EVENTFD
1337	if (evfd >= 0)	1510	if (evfd >= 0)
1338	{	1511	{
1339	uint64_t counter;	1512	uint64_t counter;
1340	read (evfd, &counter, sizeof (uint64_t));	1513	read (evfd, &counter, sizeof (uint64_t));
1341	}	1514	}
1342	else	1515	else
1343	#endif	1516	#endif
1344	{	1517	{
1345	char dummy;	1518	char dummy;
1346	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1519	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1347	read (evpipe [0], &dummy, 1);	1520	read (evpipe [0], &dummy, 1);
		1521	}
1348	}	1522	}
1349		1523
		1524	pipe_write_skipped = 0;
		1525
		1526	#if EV_SIGNAL_ENABLE
1350	if (sig_pending)	1527	if (sig_pending)
1351	{	1528	{
1352	sig_pending = 0;	1529	sig_pending = 0;
1353		1530
1354	for (i = EV_NSIG - 1; i--; )	1531	for (i = EV_NSIG - 1; i--; )
1355	if (expect_false (signals [i].pending))	1532	if (expect_false (signals [i].pending))
1356	ev_feed_signal_event (EV_A_ i + 1);	1533	ev_feed_signal_event (EV_A_ i + 1);
1357	}	1534	}
		1535	#endif
1358		1536
1359	#if EV_ASYNC_ENABLE	1537	#if EV_ASYNC_ENABLE
1360	if (async_pending)	1538	if (async_pending)
1361	{	1539	{
1362	async_pending = 0;	1540	async_pending = 0;
…		…
1371	#endif	1549	#endif
1372	}	1550	}
1373		1551
1374	/*****************************************************************************/	1552	/*****************************************************************************/
1375		1553
		1554	void
		1555	ev_feed_signal (int signum)
		1556	{
		1557	#if EV_MULTIPLICITY
		1558	EV_P = signals [signum - 1].loop;
		1559
		1560	if (!EV_A)
		1561	return;
		1562	#endif
		1563
		1564	if (!ev_active (&pipe_w))
		1565	return;
		1566
		1567	signals [signum - 1].pending = 1;
		1568	evpipe_write (EV_A_ &sig_pending);
		1569	}
		1570
1376	static void	1571	static void
1377	ev_sighandler (int signum)	1572	ev_sighandler (int signum)
1378	{	1573	{
1379	#if EV_MULTIPLICITY
1380	EV_P = signals [signum - 1].loop;
1381	#endif
1382
1383	#ifdef _WIN32	1574	#ifdef _WIN32
1384	signal (signum, ev_sighandler);	1575	signal (signum, ev_sighandler);
1385	#endif	1576	#endif
1386		1577
1387	signals [signum - 1].pending = 1;	1578	ev_feed_signal (signum);
1388	evpipe_write (EV_A_ &sig_pending);
1389	}	1579	}
1390		1580
1391	void noinline	1581	void noinline
1392	ev_feed_signal_event (EV_P_ int signum)	1582	ev_feed_signal_event (EV_P_ int signum)
1393	{	1583	{
…		…
1512	#endif	1702	#endif
1513	#if EV_USE_SELECT	1703	#if EV_USE_SELECT
1514	# include "ev_select.c"	1704	# include "ev_select.c"
1515	#endif	1705	#endif
1516		1706
1517	int	1707	int ecb_cold
1518	ev_version_major (void)	1708	ev_version_major (void)
1519	{	1709	{
1520	return EV_VERSION_MAJOR;	1710	return EV_VERSION_MAJOR;
1521	}	1711	}
1522		1712
1523	int	1713	int ecb_cold
1524	ev_version_minor (void)	1714	ev_version_minor (void)
1525	{	1715	{
1526	return EV_VERSION_MINOR;	1716	return EV_VERSION_MINOR;
1527	}	1717	}
1528		1718
1529	/* return true if we are running with elevated privileges and should ignore env variables */	1719	/* return true if we are running with elevated privileges and should ignore env variables */
1530	int inline_size	1720	int inline_size ecb_cold
1531	enable_secure (void)	1721	enable_secure (void)
1532	{	1722	{
1533	#ifdef _WIN32	1723	#ifdef _WIN32
1534	return 0;	1724	return 0;
1535	#else	1725	#else
1536	return getuid () != geteuid ()	1726	return getuid () != geteuid ()
1537	\|\| getgid () != getegid ();	1727	\|\| getgid () != getegid ();
1538	#endif	1728	#endif
1539	}	1729	}
1540		1730
1541	unsigned int	1731	unsigned int ecb_cold
1542	ev_supported_backends (void)	1732	ev_supported_backends (void)
1543	{	1733	{
1544	unsigned int flags = 0;	1734	unsigned int flags = 0;
1545		1735
1546	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1736	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1550	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1740	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1551		1741
1552	return flags;	1742	return flags;
1553	}	1743	}
1554		1744
1555	unsigned int	1745	unsigned int ecb_cold
1556	ev_recommended_backends (void)	1746	ev_recommended_backends (void)
1557	{	1747	{
1558	unsigned int flags = ev_supported_backends ();	1748	unsigned int flags = ev_supported_backends ();
1559		1749
1560	#ifndef __NetBSD__	1750	#ifndef __NetBSD__
…		…
1572	#endif	1762	#endif
1573		1763
1574	return flags;	1764	return flags;
1575	}	1765	}
1576		1766
1577	unsigned int	1767	unsigned int ecb_cold
1578	ev_embeddable_backends (void)	1768	ev_embeddable_backends (void)
1579	{	1769	{
1580	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1770	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1581		1771
1582	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1772	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1627	ev_userdata (EV_P)	1817	ev_userdata (EV_P)
1628	{	1818	{
1629	return userdata;	1819	return userdata;
1630	}	1820	}
1631		1821
		1822	void
1632	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1823	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633	{	1824	{
1634	invoke_cb = invoke_pending_cb;	1825	invoke_cb = invoke_pending_cb;
1635	}	1826	}
1636		1827
		1828	void
1637	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1829	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1638	{	1830	{
1639	release_cb = release;	1831	release_cb = release;
1640	acquire_cb = acquire;	1832	acquire_cb = acquire;
1641	}	1833	}
1642	#endif	1834	#endif
1643		1835
1644	/* initialise a loop structure, must be zero-initialised */	1836	/* initialise a loop structure, must be zero-initialised */
1645	static void noinline	1837	static void noinline ecb_cold
1646	loop_init (EV_P_ unsigned int flags)	1838	loop_init (EV_P_ unsigned int flags)
1647	{	1839	{
1648	if (!backend)	1840	if (!backend)
1649	{	1841	{
		1842	origflags = flags;
		1843
1650	#if EV_USE_REALTIME	1844	#if EV_USE_REALTIME
1651	if (!have_realtime)	1845	if (!have_realtime)
1652	{	1846	{
1653	struct timespec ts;	1847	struct timespec ts;
1654		1848
…		…
1676	if (!(flags & EVFLAG_NOENV)	1870	if (!(flags & EVFLAG_NOENV)
1677	&& !enable_secure ()	1871	&& !enable_secure ()
1678	&& getenv ("LIBEV_FLAGS"))	1872	&& getenv ("LIBEV_FLAGS"))
1679	flags = atoi (getenv ("LIBEV_FLAGS"));	1873	flags = atoi (getenv ("LIBEV_FLAGS"));
1680		1874
1681	ev_rt_now = ev_time ();	1875	ev_rt_now = ev_time ();
1682	mn_now = get_clock ();	1876	mn_now = get_clock ();
1683	now_floor = mn_now;	1877	now_floor = mn_now;
1684	rtmn_diff = ev_rt_now - mn_now;	1878	rtmn_diff = ev_rt_now - mn_now;
1685	#if EV_FEATURE_API	1879	#if EV_FEATURE_API
1686	invoke_cb = ev_invoke_pending;	1880	invoke_cb = ev_invoke_pending;
1687	#endif	1881	#endif
1688		1882
1689	io_blocktime = 0.;	1883	io_blocktime = 0.;
1690	timeout_blocktime = 0.;	1884	timeout_blocktime = 0.;
1691	backend = 0;	1885	backend = 0;
1692	backend_fd = -1;	1886	backend_fd = -1;
1693	sig_pending = 0;	1887	sig_pending = 0;
1694	#if EV_ASYNC_ENABLE	1888	#if EV_ASYNC_ENABLE
1695	async_pending = 0;	1889	async_pending = 0;
1696	#endif	1890	#endif
		1891	pipe_write_skipped = 0;
		1892	pipe_write_wanted = 0;
1697	#if EV_USE_INOTIFY	1893	#if EV_USE_INOTIFY
1698	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1894	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699	#endif	1895	#endif
1700	#if EV_USE_SIGNALFD	1896	#if EV_USE_SIGNALFD
1701	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1897	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702	#endif	1898	#endif
1703		1899
1704	if (!(flags & 0x0000ffffU))	1900	if (!(flags & EVBACKEND_MASK))
1705	flags \|= ev_recommended_backends ();	1901	flags \|= ev_recommended_backends ();
1706		1902
1707	#if EV_USE_IOCP	1903	#if EV_USE_IOCP
1708	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);	1904	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709	#endif	1905	#endif
…		…
1731	#endif	1927	#endif
1732	}	1928	}
1733	}	1929	}
1734		1930
1735	/* free up a loop structure */	1931	/* free up a loop structure */
1736	void	1932	void ecb_cold
1737	ev_loop_destroy (EV_P)	1933	ev_loop_destroy (EV_P)
1738	{	1934	{
1739	int i;	1935	int i;
		1936
		1937	#if EV_MULTIPLICITY
		1938	/* mimic free (0) */
		1939	if (!EV_A)
		1940	return;
		1941	#endif
1740		1942
1741	#if EV_CLEANUP_ENABLE	1943	#if EV_CLEANUP_ENABLE
1742	/* queue cleanup watchers (and execute them) */	1944	/* queue cleanup watchers (and execute them) */
1743	if (expect_false (cleanupcnt))	1945	if (expect_false (cleanupcnt))
1744	{	1946	{
…		…
1865	infy_fork (EV_A);	2067	infy_fork (EV_A);
1866	#endif	2068	#endif
1867		2069
1868	if (ev_is_active (&pipe_w))	2070	if (ev_is_active (&pipe_w))
1869	{	2071	{
1870	/* this "locks" the handlers against writing to the pipe */	2072	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1871	/* while we modify the fd vars */
1872	sig_pending = 1;
1873	#if EV_ASYNC_ENABLE
1874	async_pending = 1;
1875	#endif
1876		2073
1877	ev_ref (EV_A);	2074	ev_ref (EV_A);
1878	ev_io_stop (EV_A_ &pipe_w);	2075	ev_io_stop (EV_A_ &pipe_w);
1879		2076
1880	#if EV_USE_EVENTFD	2077	#if EV_USE_EVENTFD
…		…
1898	postfork = 0;	2095	postfork = 0;
1899	}	2096	}
1900		2097
1901	#if EV_MULTIPLICITY	2098	#if EV_MULTIPLICITY
1902		2099
1903	struct ev_loop *	2100	struct ev_loop * ecb_cold
1904	ev_loop_new (unsigned int flags)	2101	ev_loop_new (unsigned int flags)
1905	{	2102	{
1906	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2103	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1907		2104
1908	memset (EV_A, 0, sizeof (struct ev_loop));	2105	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1916	}	2113	}
1917		2114
1918	#endif /* multiplicity */	2115	#endif /* multiplicity */
1919		2116
1920	#if EV_VERIFY	2117	#if EV_VERIFY
1921	static void noinline	2118	static void noinline ecb_cold
1922	verify_watcher (EV_P_ W w)	2119	verify_watcher (EV_P_ W w)
1923	{	2120	{
1924	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2121	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1925		2122
1926	if (w->pending)	2123	if (w->pending)
1927	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2124	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1928	}	2125	}
1929		2126
1930	static void noinline	2127	static void noinline ecb_cold
1931	verify_heap (EV_P_ ANHE *heap, int N)	2128	verify_heap (EV_P_ ANHE *heap, int N)
1932	{	2129	{
1933	int i;	2130	int i;
1934		2131
1935	for (i = HEAP0; i < N + HEAP0; ++i)	2132	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1940		2137
1941	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2138	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1942	}	2139	}
1943	}	2140	}
1944		2141
1945	static void noinline	2142	static void noinline ecb_cold
1946	array_verify (EV_P_ W *ws, int cnt)	2143	array_verify (EV_P_ W *ws, int cnt)
1947	{	2144	{
1948	while (cnt--)	2145	while (cnt--)
1949	{	2146	{
1950	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2147	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1952	}	2149	}
1953	}	2150	}
1954	#endif	2151	#endif
1955		2152
1956	#if EV_FEATURE_API	2153	#if EV_FEATURE_API
1957	void	2154	void ecb_cold
1958	ev_verify (EV_P)	2155	ev_verify (EV_P)
1959	{	2156	{
1960	#if EV_VERIFY	2157	#if EV_VERIFY
1961	int i;	2158	int i;
1962	WL w;	2159	WL w;
…		…
2028	#endif	2225	#endif
2029	}	2226	}
2030	#endif	2227	#endif
2031		2228
2032	#if EV_MULTIPLICITY	2229	#if EV_MULTIPLICITY
2033	struct ev_loop *	2230	struct ev_loop * ecb_cold
2034	#else	2231	#else
2035	int	2232	int
2036	#endif	2233	#endif
2037	ev_default_loop (unsigned int flags)	2234	ev_default_loop (unsigned int flags)
2038	{	2235	{
…		…
2096	for (pri = NUMPRI; pri--; )	2293	for (pri = NUMPRI; pri--; )
2097	while (pendingcnt [pri])	2294	while (pendingcnt [pri])
2098	{	2295	{
2099	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2296	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2100		2297
2101	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2102	/* ^ this is no longer true, as pending_w could be here */
2103
2104	p->w->pending = 0;	2298	p->w->pending = 0;
2105	EV_CB_INVOKE (p->w, p->events);	2299	EV_CB_INVOKE (p->w, p->events);
2106	EV_FREQUENT_CHECK;	2300	EV_FREQUENT_CHECK;
2107	}	2301	}
2108	}	2302	}
…		…
2169	feed_reverse_done (EV_A_ EV_TIMER);	2363	feed_reverse_done (EV_A_ EV_TIMER);
2170	}	2364	}
2171	}	2365	}
2172		2366
2173	#if EV_PERIODIC_ENABLE	2367	#if EV_PERIODIC_ENABLE
		2368
		2369	static void noinline
		2370	periodic_recalc (EV_P_ ev_periodic *w)
		2371	{
		2372	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2373	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2374
		2375	/* the above almost always errs on the low side */
		2376	while (at <= ev_rt_now)
		2377	{
		2378	ev_tstamp nat = at + w->interval;
		2379
		2380	/* when resolution fails us, we use ev_rt_now */
		2381	if (expect_false (nat == at))
		2382	{
		2383	at = ev_rt_now;
		2384	break;
		2385	}
		2386
		2387	at = nat;
		2388	}
		2389
		2390	ev_at (w) = at;
		2391	}
		2392
2174	/* make periodics pending */	2393	/* make periodics pending */
2175	inline_size void	2394	inline_size void
2176	periodics_reify (EV_P)	2395	periodics_reify (EV_P)
2177	{	2396	{
2178	EV_FREQUENT_CHECK;	2397	EV_FREQUENT_CHECK;
…		…
2197	ANHE_at_cache (periodics [HEAP0]);	2416	ANHE_at_cache (periodics [HEAP0]);
2198	downheap (periodics, periodiccnt, HEAP0);	2417	downheap (periodics, periodiccnt, HEAP0);
2199	}	2418	}
2200	else if (w->interval)	2419	else if (w->interval)
2201	{	2420	{
2202	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2421	periodic_recalc (EV_A_ w);
2203	/* if next trigger time is not sufficiently in the future, put it there */
2204	/* this might happen because of floating point inexactness */
2205	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2206	{
2207	ev_at (w) += w->interval;
2208
2209	/* if interval is unreasonably low we might still have a time in the past */
2210	/* so correct this. this will make the periodic very inexact, but the user */
2211	/* has effectively asked to get triggered more often than possible */
2212	if (ev_at (w) < ev_rt_now)
2213	ev_at (w) = ev_rt_now;
2214	}
2215
2216	ANHE_at_cache (periodics [HEAP0]);	2422	ANHE_at_cache (periodics [HEAP0]);
2217	downheap (periodics, periodiccnt, HEAP0);	2423	downheap (periodics, periodiccnt, HEAP0);
2218	}	2424	}
2219	else	2425	else
2220	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2426	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2228	}	2434	}
2229	}	2435	}
2230		2436
2231	/* simply recalculate all periodics */	2437	/* simply recalculate all periodics */
2232	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2438	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2233	static void noinline	2439	static void noinline ecb_cold
2234	periodics_reschedule (EV_P)	2440	periodics_reschedule (EV_P)
2235	{	2441	{
2236	int i;	2442	int i;
2237		2443
2238	/* adjust periodics after time jump */	2444	/* adjust periodics after time jump */
…		…
2241	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2447	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2242		2448
2243	if (w->reschedule_cb)	2449	if (w->reschedule_cb)
2244	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2450	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2245	else if (w->interval)	2451	else if (w->interval)
2246	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2452	periodic_recalc (EV_A_ w);
2247		2453
2248	ANHE_at_cache (periodics [i]);	2454	ANHE_at_cache (periodics [i]);
2249	}	2455	}
2250		2456
2251	reheap (periodics, periodiccnt);	2457	reheap (periodics, periodiccnt);
2252	}	2458	}
2253	#endif	2459	#endif
2254		2460
2255	/* adjust all timers by a given offset */	2461	/* adjust all timers by a given offset */
2256	static void noinline	2462	static void noinline ecb_cold
2257	timers_reschedule (EV_P_ ev_tstamp adjust)	2463	timers_reschedule (EV_P_ ev_tstamp adjust)
2258	{	2464	{
2259	int i;	2465	int i;
2260		2466
2261	for (i = 0; i < timercnt; ++i)	2467	for (i = 0; i < timercnt; ++i)
…		…
2298	* doesn't hurt either as we only do this on time-jumps or	2504	* doesn't hurt either as we only do this on time-jumps or
2299	* in the unlikely event of having been preempted here.	2505	* in the unlikely event of having been preempted here.
2300	*/	2506	*/
2301	for (i = 4; --i; )	2507	for (i = 4; --i; )
2302	{	2508	{
		2509	ev_tstamp diff;
2303	rtmn_diff = ev_rt_now - mn_now;	2510	rtmn_diff = ev_rt_now - mn_now;
2304		2511
		2512	diff = odiff - rtmn_diff;
		2513
2305	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2514	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2306	return; /* all is well */	2515	return; /* all is well */
2307		2516
2308	ev_rt_now = ev_time ();	2517	ev_rt_now = ev_time ();
2309	mn_now = get_clock ();	2518	mn_now = get_clock ();
2310	now_floor = mn_now;	2519	now_floor = mn_now;
…		…
2400	ev_tstamp prev_mn_now = mn_now;	2609	ev_tstamp prev_mn_now = mn_now;
2401		2610
2402	/* update time to cancel out callback processing overhead */	2611	/* update time to cancel out callback processing overhead */
2403	time_update (EV_A_ 1e100);	2612	time_update (EV_A_ 1e100);
2404		2613
		2614	/* from now on, we want a pipe-wake-up */
		2615	pipe_write_wanted = 1;
		2616
		2617	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2618
2405	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2619	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2406	{	2620	{
2407	waittime = MAX_BLOCKTIME;	2621	waittime = MAX_BLOCKTIME;
2408		2622
2409	if (timercnt)	2623	if (timercnt)
2410	{	2624	{
2411	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2625	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2412	if (waittime > to) waittime = to;	2626	if (waittime > to) waittime = to;
2413	}	2627	}
2414		2628
2415	#if EV_PERIODIC_ENABLE	2629	#if EV_PERIODIC_ENABLE
2416	if (periodiccnt)	2630	if (periodiccnt)
2417	{	2631	{
2418	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2632	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2419	if (waittime > to) waittime = to;	2633	if (waittime > to) waittime = to;
2420	}	2634	}
2421	#endif	2635	#endif
2422		2636
2423	/* don't let timeouts decrease the waittime below timeout_blocktime */	2637	/* don't let timeouts decrease the waittime below timeout_blocktime */
2424	if (expect_false (waittime < timeout_blocktime))	2638	if (expect_false (waittime < timeout_blocktime))
2425	waittime = timeout_blocktime;	2639	waittime = timeout_blocktime;
		2640
		2641	/* at this point, we NEED to wait, so we have to ensure */
		2642	/* to pass a minimum nonzero value to the backend */
		2643	if (expect_false (waittime < backend_mintime))
		2644	waittime = backend_mintime;
2426		2645
2427	/* extra check because io_blocktime is commonly 0 */	2646	/* extra check because io_blocktime is commonly 0 */
2428	if (expect_false (io_blocktime))	2647	if (expect_false (io_blocktime))
2429	{	2648	{
2430	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2649	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2431		2650
2432	if (sleeptime > waittime - backend_fudge)	2651	if (sleeptime > waittime - backend_mintime)
2433	sleeptime = waittime - backend_fudge;	2652	sleeptime = waittime - backend_mintime;
2434		2653
2435	if (expect_true (sleeptime > 0.))	2654	if (expect_true (sleeptime > 0.))
2436	{	2655	{
2437	ev_sleep (sleeptime);	2656	ev_sleep (sleeptime);
2438	waittime -= sleeptime;	2657	waittime -= sleeptime;
…		…
2444	++loop_count;	2663	++loop_count;
2445	#endif	2664	#endif
2446	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2665	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2447	backend_poll (EV_A_ waittime);	2666	backend_poll (EV_A_ waittime);
2448	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2667	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2668
		2669	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2670
		2671	if (pipe_write_skipped)
		2672	{
		2673	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2674	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2675	}
		2676
2449		2677
2450	/* update ev_rt_now, do magic */	2678	/* update ev_rt_now, do magic */
2451	time_update (EV_A_ waittime + sleeptime);	2679	time_update (EV_A_ waittime + sleeptime);
2452	}	2680	}
2453		2681
…		…
2743	if (w->reschedule_cb)	2971	if (w->reschedule_cb)
2744	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2972	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2745	else if (w->interval)	2973	else if (w->interval)
2746	{	2974	{
2747	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2975	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2748	/* this formula differs from the one in periodic_reify because we do not always round up */	2976	periodic_recalc (EV_A_ w);
2749	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2750	}	2977	}
2751	else	2978	else
2752	ev_at (w) = w->offset;	2979	ev_at (w) = w->offset;
2753		2980
2754	EV_FREQUENT_CHECK;	2981	EV_FREQUENT_CHECK;
…		…
2875	sa.sa_handler = ev_sighandler;	3102	sa.sa_handler = ev_sighandler;
2876	sigfillset (&sa.sa_mask);	3103	sigfillset (&sa.sa_mask);
2877	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3104	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2878	sigaction (w->signum, &sa, 0);	3105	sigaction (w->signum, &sa, 0);
2879		3106
		3107	if (origflags & EVFLAG_NOSIGMASK)
		3108	{
2880	sigemptyset (&sa.sa_mask);	3109	sigemptyset (&sa.sa_mask);
2881	sigaddset (&sa.sa_mask, w->signum);	3110	sigaddset (&sa.sa_mask, w->signum);
2882	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3111	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3112	}
2883	#endif	3113	#endif
2884	}	3114	}
2885		3115
2886	EV_FREQUENT_CHECK;	3116	EV_FREQUENT_CHECK;
2887	}	3117	}
…		…
3028	if (!pend \|\| pend == path)	3258	if (!pend \|\| pend == path)
3029	break;	3259	break;
3030		3260
3031	*pend = 0;	3261	*pend = 0;
3032	w->wd = inotify_add_watch (fs_fd, path, mask);	3262	w->wd = inotify_add_watch (fs_fd, path, mask);
3033	}	3263	}
3034	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3264	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3035	}	3265	}
3036	}	3266	}
3037		3267
3038	if (w->wd >= 0)	3268	if (w->wd >= 0)
…		…
3105	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3335	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3106	ofs += sizeof (struct inotify_event) + ev->len;	3336	ofs += sizeof (struct inotify_event) + ev->len;
3107	}	3337	}
3108	}	3338	}
3109		3339
3110	inline_size void	3340	inline_size void ecb_cold
3111	ev_check_2625 (EV_P)	3341	ev_check_2625 (EV_P)
3112	{	3342	{
3113	/* kernels < 2.6.25 are borked	3343	/* kernels < 2.6.25 are borked
3114	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3344	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3115	*/	3345	*/
…		…
3592		3822
3593	ev_start (EV_A_ (W)w, ++cleanupcnt);	3823	ev_start (EV_A_ (W)w, ++cleanupcnt);
3594	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);	3824	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3595	cleanups [cleanupcnt - 1] = w;	3825	cleanups [cleanupcnt - 1] = w;
3596		3826
		3827	/* cleanup watchers should never keep a refcount on the loop */
		3828	ev_unref (EV_A);
3597	EV_FREQUENT_CHECK;	3829	EV_FREQUENT_CHECK;
3598	}	3830	}
3599		3831
3600	void	3832	void
3601	ev_cleanup_stop (EV_P_ ev_cleanup *w)	3833	ev_cleanup_stop (EV_P_ ev_cleanup *w)
…		…
3603	clear_pending (EV_A_ (W)w);	3835	clear_pending (EV_A_ (W)w);
3604	if (expect_false (!ev_is_active (w)))	3836	if (expect_false (!ev_is_active (w)))
3605	return;	3837	return;
3606		3838
3607	EV_FREQUENT_CHECK;	3839	EV_FREQUENT_CHECK;
		3840	ev_ref (EV_A);
3608		3841
3609	{	3842	{
3610	int active = ev_active (w);	3843	int active = ev_active (w);
3611		3844
3612	cleanups [active - 1] = cleanups [--cleanupcnt];	3845	cleanups [active - 1] = cleanups [--cleanupcnt];
…		…
3737	}	3970	}
3738		3971
3739	/*****************************************************************************/	3972	/*****************************************************************************/
3740		3973
3741	#if EV_WALK_ENABLE	3974	#if EV_WALK_ENABLE
3742	void	3975	void ecb_cold
3743	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3976	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3744	{	3977	{
3745	int i, j;	3978	int i, j;
3746	ev_watcher_list wl, wn;	3979	ev_watcher_list wl, wn;
3747		3980

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Comparing libev/ev.c (file contents): Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC vs. Revision 1.386 by root, Wed Jul 20 01:04:20 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC vs.
Revision 1.386 by root, Wed Jul 20 01:04:20 2011 UTC