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

Comparing libev/ev.c (file contents):
Revision 1.365 by root, Sun Oct 31 22:01:20 2010 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 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
		517	#define ECB_MEMORY_FENCE do { } while (0)
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#elif defined(_WIN32) && defined(MemoryBarrier)
		521	#define ECB_MEMORY_FENCE MemoryBarrier ()
		522	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		523	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		524	#endif
		525	#endif
		526
		527	#ifndef ECB_MEMORY_FENCE
		528	#include <pthread.h>
		529
		530	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		531	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		532	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		533	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		534	#endif
		535
		536	#if ECB_GCC_VERSION(3,1)
		537	#define ecb_attribute(attrlist) __attribute__(attrlist)
		538	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		539	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		540	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		541	#else
		542	#define ecb_attribute(attrlist)
		543	#define ecb_is_constant(expr) 0
		544	#define ecb_expect(expr,value) (expr)
		545	#define ecb_prefetch(addr,rw,locality)
		546	#endif
		547
		548	#define ecb_noinline ecb_attribute ((__noinline__))
		549	#define ecb_noreturn ecb_attribute ((__noreturn__))
		550	#define ecb_unused ecb_attribute ((__unused__))
		551	#define ecb_const ecb_attribute ((__const__))
		552	#define ecb_pure ecb_attribute ((__pure__))
		553
		554	#if ECB_GCC_VERSION(4,3)
		555	#define ecb_artificial ecb_attribute ((__artificial__))
		556	#define ecb_hot ecb_attribute ((__hot__))
		557	#define ecb_cold ecb_attribute ((__cold__))
		558	#else
		559	#define ecb_artificial
		560	#define ecb_hot
		561	#define ecb_cold
		562	#endif
		563
		564	/* put around conditional expressions if you are very sure that the */
		565	/* expression is mostly true or mostly false. note that these return */
		566	/* booleans, not the expression. */
473	#define expect_false(expr) expect ((expr) != 0, 0)	567	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474	#define expect_true(expr) expect ((expr) != 0, 1)	568	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		569	/* ecb.h end */
		570
		571	#define expect_false(cond) ecb_expect_false (cond)
		572	#define expect_true(cond) ecb_expect_true (cond)
		573	#define noinline ecb_noinline
		574
475	#define inline_size static inline	575	#define inline_size ecb_inline
476		576
477	#if EV_FEATURE_CODE	577	#if EV_FEATURE_CODE
478	# define inline_speed static inline	578	# define inline_speed ecb_inline
479	#else	579	#else
480	# define inline_speed static noinline	580	# define inline_speed static noinline
481	#endif	581	#endif
482		582
483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	583	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
522	# include "ev_win32.c"	622	# include "ev_win32.c"
523	#endif	623	#endif
524		624
525	/*****************************************************************************/	625	/*****************************************************************************/
526		626
		627	/* define a suitable floor function (only used by periodics atm) */
		628
		629	#if EV_USE_FLOOR
		630	# include <math.h>
		631	# define ev_floor(v) floor (v)
		632	#else
		633
		634	#include <float.h>
		635
		636	/* a floor() replacement function, should be independent of ev_tstamp type */
		637	static ev_tstamp noinline
		638	ev_floor (ev_tstamp v)
		639	{
		640	/* the choice of shift factor is not terribly important */
		641	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		642	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		643	#else
		644	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		645	#endif
		646
		647	/* argument too large for an unsigned long? */
		648	if (expect_false (v >= shift))
		649	{
		650	ev_tstamp f;
		651
		652	if (v == v - 1.)
		653	return v; /* very large number */
		654
		655	f = shift * ev_floor (v * (1. / shift));
		656	return f + ev_floor (v - f);
		657	}
		658
		659	/* special treatment for negative args? */
		660	if (expect_false (v < 0.))
		661	{
		662	ev_tstamp f = -ev_floor (-v);
		663
		664	return f - (f == v ? 0 : 1);
		665	}
		666
		667	/* fits into an unsigned long */
		668	return (unsigned long)v;
		669	}
		670
		671	#endif
		672
		673	/*****************************************************************************/
		674
527	#ifdef __linux	675	#ifdef __linux
528	# include <sys/utsname.h>	676	# include <sys/utsname.h>
529	#endif	677	#endif
530		678
531	static unsigned int noinline	679	static unsigned int noinline ecb_cold
532	ev_linux_version (void)	680	ev_linux_version (void)
533	{	681	{
534	#ifdef __linux	682	#ifdef __linux
535	unsigned int v = 0;	683	unsigned int v = 0;
536	struct utsname buf;	684	struct utsname buf;
…		…
565	}	713	}
566		714
567	/*****************************************************************************/	715	/*****************************************************************************/
568		716
569	#if EV_AVOID_STDIO	717	#if EV_AVOID_STDIO
570	static void noinline	718	static void noinline ecb_cold
571	ev_printerr (const char *msg)	719	ev_printerr (const char *msg)
572	{	720	{
573	write (STDERR_FILENO, msg, strlen (msg));	721	write (STDERR_FILENO, msg, strlen (msg));
574	}	722	}
575	#endif	723	#endif
576		724
577	static void (syserr_cb)(const char msg);	725	static void (syserr_cb)(const char msg);
578		726
579	void	727	void ecb_cold
580	ev_set_syserr_cb (void (cb)(const char msg))	728	ev_set_syserr_cb (void (cb)(const char msg))
581	{	729	{
582	syserr_cb = cb;	730	syserr_cb = cb;
583	}	731	}
584		732
585	static void noinline	733	static void noinline ecb_cold
586	ev_syserr (const char *msg)	734	ev_syserr (const char *msg)
587	{	735	{
588	if (!msg)	736	if (!msg)
589	msg = "(libev) system error";	737	msg = "(libev) system error";
590		738
…		…
623	#endif	771	#endif
624	}	772	}
625		773
626	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	774	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
627		775
628	void	776	void ecb_cold
629	ev_set_allocator (void (cb)(void *ptr, long size))	777	ev_set_allocator (void (cb)(void *ptr, long size))
630	{	778	{
631	alloc = cb;	779	alloc = cb;
632	}	780	}
633		781
…		…
842	}	990	}
843		991
844	return ncur;	992	return ncur;
845	}	993	}
846		994
847	static noinline void *	995	static void * noinline ecb_cold
848	array_realloc (int elem, void base, int cur, int cnt)	996	array_realloc (int elem, void base, int cur, int cnt)
849	{	997	{
850	cur = array_nextsize (elem, cur, cnt);	998	cur = array_nextsize (elem, cur, cnt);
851	return ev_realloc (base, elem * *cur);	999	return ev_realloc (base, elem * *cur);
852	}	1000	}
…		…
855	memset ((void )(base), 0, sizeof ((base)) * (count))	1003	memset ((void )(base), 0, sizeof ((base)) * (count))
856		1004
857	#define array_needsize(type,base,cur,cnt,init) \	1005	#define array_needsize(type,base,cur,cnt,init) \
858	if (expect_false ((cnt) > (cur))) \	1006	if (expect_false ((cnt) > (cur))) \
859	{ \	1007	{ \
860	int ocur_ = (cur); \	1008	int ecb_unused ocur_ = (cur); \
861	(base) = (type *)array_realloc \	1009	(base) = (type *)array_realloc \
862	(sizeof (type), (base), &(cur), (cnt)); \	1010	(sizeof (type), (base), &(cur), (cnt)); \
863	init ((base) + (ocur_), (cur) - ocur_); \	1011	init ((base) + (ocur_), (cur) - ocur_); \
864	}	1012	}
865		1013
…		…
965	inline_size void	1113	inline_size void
966	fd_reify (EV_P)	1114	fd_reify (EV_P)
967	{	1115	{
968	int i;	1116	int i;
969		1117
		1118	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1119	for (i = 0; i < fdchangecnt; ++i)
		1120	{
		1121	int fd = fdchanges [i];
		1122	ANFD *anfd = anfds + fd;
		1123
		1124	if (anfd->reify & EV__IOFDSET && anfd->head)
		1125	{
		1126	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1127
		1128	if (handle != anfd->handle)
		1129	{
		1130	unsigned long arg;
		1131
		1132	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1133
		1134	/* handle changed, but fd didn't - we need to do it in two steps */
		1135	backend_modify (EV_A_ fd, anfd->events, 0);
		1136	anfd->events = 0;
		1137	anfd->handle = handle;
		1138	}
		1139	}
		1140	}
		1141	#endif
		1142
970	for (i = 0; i < fdchangecnt; ++i)	1143	for (i = 0; i < fdchangecnt; ++i)
971	{	1144	{
972	int fd = fdchanges [i];	1145	int fd = fdchanges [i];
973	ANFD *anfd = anfds + fd;	1146	ANFD *anfd = anfds + fd;
974	ev_io *w;	1147	ev_io *w;
…		…
976	unsigned char o_events = anfd->events;	1149	unsigned char o_events = anfd->events;
977	unsigned char o_reify = anfd->reify;	1150	unsigned char o_reify = anfd->reify;
978		1151
979	anfd->reify = 0;	1152	anfd->reify = 0;
980		1153
981	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
982	if (o_reify & EV__IOFDSET)
983	{
984	unsigned long arg;
985	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
986	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
987	printf ("oi %d %x\n", fd, anfd->handle);//D
988	}
989	#endif
990
991	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1154	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
992	{	1155	{
993	anfd->events = 0;	1156	anfd->events = 0;
994		1157
995	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1158	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1020	fdchanges [fdchangecnt - 1] = fd;	1183	fdchanges [fdchangecnt - 1] = fd;
1021	}	1184	}
1022	}	1185	}
1023		1186
1024	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1187	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1025	inline_speed void	1188	inline_speed void ecb_cold
1026	fd_kill (EV_P_ int fd)	1189	fd_kill (EV_P_ int fd)
1027	{	1190	{
1028	ev_io *w;	1191	ev_io *w;
1029		1192
1030	while ((w = (ev_io *)anfds [fd].head))	1193	while ((w = (ev_io *)anfds [fd].head))
…		…
1033	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1196	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1034	}	1197	}
1035	}	1198	}
1036		1199
1037	/* check whether the given fd is actually valid, for error recovery */	1200	/* check whether the given fd is actually valid, for error recovery */
1038	inline_size int	1201	inline_size int ecb_cold
1039	fd_valid (int fd)	1202	fd_valid (int fd)
1040	{	1203	{
1041	#ifdef _WIN32	1204	#ifdef _WIN32
1042	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1205	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1043	#else	1206	#else
1044	return fcntl (fd, F_GETFD) != -1;	1207	return fcntl (fd, F_GETFD) != -1;
1045	#endif	1208	#endif
1046	}	1209	}
1047		1210
1048	/* called on EBADF to verify fds */	1211	/* called on EBADF to verify fds */
1049	static void noinline	1212	static void noinline ecb_cold
1050	fd_ebadf (EV_P)	1213	fd_ebadf (EV_P)
1051	{	1214	{
1052	int fd;	1215	int fd;
1053		1216
1054	for (fd = 0; fd < anfdmax; ++fd)	1217	for (fd = 0; fd < anfdmax; ++fd)
…		…
1056	if (!fd_valid (fd) && errno == EBADF)	1219	if (!fd_valid (fd) && errno == EBADF)
1057	fd_kill (EV_A_ fd);	1220	fd_kill (EV_A_ fd);
1058	}	1221	}
1059		1222
1060	/* called on ENOMEM in select/poll to kill some fds and retry */	1223	/* called on ENOMEM in select/poll to kill some fds and retry */
1061	static void noinline	1224	static void noinline ecb_cold
1062	fd_enomem (EV_P)	1225	fd_enomem (EV_P)
1063	{	1226	{
1064	int fd;	1227	int fd;
1065		1228
1066	for (fd = anfdmax; fd--; )	1229	for (fd = anfdmax; fd--; )
…		…
1261		1424
1262	/*****************************************************************************/	1425	/*****************************************************************************/
1263		1426
1264	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1427	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1265		1428
1266	static void noinline	1429	static void noinline ecb_cold
1267	evpipe_init (EV_P)	1430	evpipe_init (EV_P)
1268	{	1431	{
1269	if (!ev_is_active (&pipe_w))	1432	if (!ev_is_active (&pipe_w))
1270	{	1433	{
1271	# if EV_USE_EVENTFD	1434	# if EV_USE_EVENTFD
…		…
1293	ev_io_start (EV_A_ &pipe_w);	1456	ev_io_start (EV_A_ &pipe_w);
1294	ev_unref (EV_A); /* watcher should not keep loop alive */	1457	ev_unref (EV_A); /* watcher should not keep loop alive */
1295	}	1458	}
1296	}	1459	}
1297		1460
1298	inline_size void	1461	inline_speed void
1299	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1462	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1300	{	1463	{
1301	if (!*flag)	1464	if (expect_true (*flag))
		1465	return;
		1466
		1467	*flag = 1;
		1468
		1469	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1470
		1471	pipe_write_skipped = 1;
		1472
		1473	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1474
		1475	if (pipe_write_wanted)
1302	{	1476	{
		1477	int old_errno;
		1478
		1479	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1480
1303	int old_errno = errno; /* save errno because write might clobber it */	1481	old_errno = errno; /* save errno because write will clobber it */
1304	char dummy;
1305
1306	*flag = 1;
1307		1482
1308	#if EV_USE_EVENTFD	1483	#if EV_USE_EVENTFD
1309	if (evfd >= 0)	1484	if (evfd >= 0)
1310	{	1485	{
1311	uint64_t counter = 1;	1486	uint64_t counter = 1;
1312	write (evfd, &counter, sizeof (uint64_t));	1487	write (evfd, &counter, sizeof (uint64_t));
1313	}	1488	}
1314	else	1489	else
1315	#endif	1490	#endif
		1491	{
1316	/* win32 people keep sending patches that change this write() to send() */	1492	/* win32 people keep sending patches that change this write() to send() */
1317	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1493	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1318	/* so when you think this write should be a send instead, please find out */	1494	/* so when you think this write should be a send instead, please find out */
1319	/* where your send() is from - it's definitely not the microsoft send, and */	1495	/* where your send() is from - it's definitely not the microsoft send, and */
1320	/* tell me. thank you. */	1496	/* tell me. thank you. */
1321	write (evpipe [1], &dummy, 1);	1497	write (evpipe [1], &(evpipe [1]), 1);
		1498	}
1322		1499
1323	errno = old_errno;	1500	errno = old_errno;
1324	}	1501	}
1325	}	1502	}
1326		1503
…		…
1329	static void	1506	static void
1330	pipecb (EV_P_ ev_io *iow, int revents)	1507	pipecb (EV_P_ ev_io *iow, int revents)
1331	{	1508	{
1332	int i;	1509	int i;
1333		1510
		1511	if (revents & EV_READ)
		1512	{
1334	#if EV_USE_EVENTFD	1513	#if EV_USE_EVENTFD
1335	if (evfd >= 0)	1514	if (evfd >= 0)
1336	{	1515	{
1337	uint64_t counter;	1516	uint64_t counter;
1338	read (evfd, &counter, sizeof (uint64_t));	1517	read (evfd, &counter, sizeof (uint64_t));
1339	}	1518	}
1340	else	1519	else
1341	#endif	1520	#endif
1342	{	1521	{
1343	char dummy;	1522	char dummy;
1344	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1523	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1345	read (evpipe [0], &dummy, 1);	1524	read (evpipe [0], &dummy, 1);
		1525	}
1346	}	1526	}
1347		1527
		1528	pipe_write_skipped = 0;
		1529
		1530	#if EV_SIGNAL_ENABLE
1348	if (sig_pending)	1531	if (sig_pending)
1349	{	1532	{
1350	sig_pending = 0;	1533	sig_pending = 0;
1351		1534
1352	for (i = EV_NSIG - 1; i--; )	1535	for (i = EV_NSIG - 1; i--; )
1353	if (expect_false (signals [i].pending))	1536	if (expect_false (signals [i].pending))
1354	ev_feed_signal_event (EV_A_ i + 1);	1537	ev_feed_signal_event (EV_A_ i + 1);
1355	}	1538	}
		1539	#endif
1356		1540
1357	#if EV_ASYNC_ENABLE	1541	#if EV_ASYNC_ENABLE
1358	if (async_pending)	1542	if (async_pending)
1359	{	1543	{
1360	async_pending = 0;	1544	async_pending = 0;
…		…
1369	#endif	1553	#endif
1370	}	1554	}
1371		1555
1372	/*****************************************************************************/	1556	/*****************************************************************************/
1373		1557
		1558	void
		1559	ev_feed_signal (int signum)
		1560	{
		1561	#if EV_MULTIPLICITY
		1562	EV_P = signals [signum - 1].loop;
		1563
		1564	if (!EV_A)
		1565	return;
		1566	#endif
		1567
		1568	if (!ev_active (&pipe_w))
		1569	return;
		1570
		1571	signals [signum - 1].pending = 1;
		1572	evpipe_write (EV_A_ &sig_pending);
		1573	}
		1574
1374	static void	1575	static void
1375	ev_sighandler (int signum)	1576	ev_sighandler (int signum)
1376	{	1577	{
1377	#if EV_MULTIPLICITY
1378	EV_P = signals [signum - 1].loop;
1379	#endif
1380
1381	#ifdef _WIN32	1578	#ifdef _WIN32
1382	signal (signum, ev_sighandler);	1579	signal (signum, ev_sighandler);
1383	#endif	1580	#endif
1384		1581
1385	signals [signum - 1].pending = 1;	1582	ev_feed_signal (signum);
1386	evpipe_write (EV_A_ &sig_pending);
1387	}	1583	}
1388		1584
1389	void noinline	1585	void noinline
1390	ev_feed_signal_event (EV_P_ int signum)	1586	ev_feed_signal_event (EV_P_ int signum)
1391	{	1587	{
…		…
1510	#endif	1706	#endif
1511	#if EV_USE_SELECT	1707	#if EV_USE_SELECT
1512	# include "ev_select.c"	1708	# include "ev_select.c"
1513	#endif	1709	#endif
1514		1710
1515	int	1711	int ecb_cold
1516	ev_version_major (void)	1712	ev_version_major (void)
1517	{	1713	{
1518	return EV_VERSION_MAJOR;	1714	return EV_VERSION_MAJOR;
1519	}	1715	}
1520		1716
1521	int	1717	int ecb_cold
1522	ev_version_minor (void)	1718	ev_version_minor (void)
1523	{	1719	{
1524	return EV_VERSION_MINOR;	1720	return EV_VERSION_MINOR;
1525	}	1721	}
1526		1722
1527	/* return true if we are running with elevated privileges and should ignore env variables */	1723	/* return true if we are running with elevated privileges and should ignore env variables */
1528	int inline_size	1724	int inline_size ecb_cold
1529	enable_secure (void)	1725	enable_secure (void)
1530	{	1726	{
1531	#ifdef _WIN32	1727	#ifdef _WIN32
1532	return 0;	1728	return 0;
1533	#else	1729	#else
1534	return getuid () != geteuid ()	1730	return getuid () != geteuid ()
1535	\|\| getgid () != getegid ();	1731	\|\| getgid () != getegid ();
1536	#endif	1732	#endif
1537	}	1733	}
1538		1734
1539	unsigned int	1735	unsigned int ecb_cold
1540	ev_supported_backends (void)	1736	ev_supported_backends (void)
1541	{	1737	{
1542	unsigned int flags = 0;	1738	unsigned int flags = 0;
1543		1739
1544	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1740	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1548	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1744	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1549		1745
1550	return flags;	1746	return flags;
1551	}	1747	}
1552		1748
1553	unsigned int	1749	unsigned int ecb_cold
1554	ev_recommended_backends (void)	1750	ev_recommended_backends (void)
1555	{	1751	{
1556	unsigned int flags = ev_supported_backends ();	1752	unsigned int flags = ev_supported_backends ();
1557		1753
1558	#ifndef __NetBSD__	1754	#ifndef __NetBSD__
…		…
1570	#endif	1766	#endif
1571		1767
1572	return flags;	1768	return flags;
1573	}	1769	}
1574		1770
1575	unsigned int	1771	unsigned int ecb_cold
1576	ev_embeddable_backends (void)	1772	ev_embeddable_backends (void)
1577	{	1773	{
1578	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1774	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1579		1775
1580	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1776	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1625	ev_userdata (EV_P)	1821	ev_userdata (EV_P)
1626	{	1822	{
1627	return userdata;	1823	return userdata;
1628	}	1824	}
1629		1825
		1826	void
1630	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1827	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1631	{	1828	{
1632	invoke_cb = invoke_pending_cb;	1829	invoke_cb = invoke_pending_cb;
1633	}	1830	}
1634		1831
		1832	void
1635	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1833	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1636	{	1834	{
1637	release_cb = release;	1835	release_cb = release;
1638	acquire_cb = acquire;	1836	acquire_cb = acquire;
1639	}	1837	}
1640	#endif	1838	#endif
1641		1839
1642	/* initialise a loop structure, must be zero-initialised */	1840	/* initialise a loop structure, must be zero-initialised */
1643	static void noinline	1841	static void noinline ecb_cold
1644	loop_init (EV_P_ unsigned int flags)	1842	loop_init (EV_P_ unsigned int flags)
1645	{	1843	{
1646	if (!backend)	1844	if (!backend)
1647	{	1845	{
		1846	origflags = flags;
		1847
1648	#if EV_USE_REALTIME	1848	#if EV_USE_REALTIME
1649	if (!have_realtime)	1849	if (!have_realtime)
1650	{	1850	{
1651	struct timespec ts;	1851	struct timespec ts;
1652		1852
…		…
1674	if (!(flags & EVFLAG_NOENV)	1874	if (!(flags & EVFLAG_NOENV)
1675	&& !enable_secure ()	1875	&& !enable_secure ()
1676	&& getenv ("LIBEV_FLAGS"))	1876	&& getenv ("LIBEV_FLAGS"))
1677	flags = atoi (getenv ("LIBEV_FLAGS"));	1877	flags = atoi (getenv ("LIBEV_FLAGS"));
1678		1878
1679	ev_rt_now = ev_time ();	1879	ev_rt_now = ev_time ();
1680	mn_now = get_clock ();	1880	mn_now = get_clock ();
1681	now_floor = mn_now;	1881	now_floor = mn_now;
1682	rtmn_diff = ev_rt_now - mn_now;	1882	rtmn_diff = ev_rt_now - mn_now;
1683	#if EV_FEATURE_API	1883	#if EV_FEATURE_API
1684	invoke_cb = ev_invoke_pending;	1884	invoke_cb = ev_invoke_pending;
1685	#endif	1885	#endif
1686		1886
1687	io_blocktime = 0.;	1887	io_blocktime = 0.;
1688	timeout_blocktime = 0.;	1888	timeout_blocktime = 0.;
1689	backend = 0;	1889	backend = 0;
1690	backend_fd = -1;	1890	backend_fd = -1;
1691	sig_pending = 0;	1891	sig_pending = 0;
1692	#if EV_ASYNC_ENABLE	1892	#if EV_ASYNC_ENABLE
1693	async_pending = 0;	1893	async_pending = 0;
1694	#endif	1894	#endif
		1895	pipe_write_skipped = 0;
		1896	pipe_write_wanted = 0;
1695	#if EV_USE_INOTIFY	1897	#if EV_USE_INOTIFY
1696	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1898	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1697	#endif	1899	#endif
1698	#if EV_USE_SIGNALFD	1900	#if EV_USE_SIGNALFD
1699	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1901	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1700	#endif	1902	#endif
1701		1903
1702	if (!(flags & 0x0000ffffU))	1904	if (!(flags & EVBACKEND_MASK))
1703	flags \|= ev_recommended_backends ();	1905	flags \|= ev_recommended_backends ();
1704		1906
1705	#if EV_USE_IOCP	1907	#if EV_USE_IOCP
1706	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);	1908	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1707	#endif	1909	#endif
…		…
1729	#endif	1931	#endif
1730	}	1932	}
1731	}	1933	}
1732		1934
1733	/* free up a loop structure */	1935	/* free up a loop structure */
1734	void	1936	void ecb_cold
1735	ev_loop_destroy (EV_P)	1937	ev_loop_destroy (EV_P)
1736	{	1938	{
1737	int i;	1939	int i;
1738		1940
1739	#if EV_MULTIPLICITY	1941	#if EV_MULTIPLICITY
…		…
1869	infy_fork (EV_A);	2071	infy_fork (EV_A);
1870	#endif	2072	#endif
1871		2073
1872	if (ev_is_active (&pipe_w))	2074	if (ev_is_active (&pipe_w))
1873	{	2075	{
1874	/* this "locks" the handlers against writing to the pipe */	2076	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1875	/* while we modify the fd vars */
1876	sig_pending = 1;
1877	#if EV_ASYNC_ENABLE
1878	async_pending = 1;
1879	#endif
1880		2077
1881	ev_ref (EV_A);	2078	ev_ref (EV_A);
1882	ev_io_stop (EV_A_ &pipe_w);	2079	ev_io_stop (EV_A_ &pipe_w);
1883		2080
1884	#if EV_USE_EVENTFD	2081	#if EV_USE_EVENTFD
…		…
1902	postfork = 0;	2099	postfork = 0;
1903	}	2100	}
1904		2101
1905	#if EV_MULTIPLICITY	2102	#if EV_MULTIPLICITY
1906		2103
1907	struct ev_loop *	2104	struct ev_loop * ecb_cold
1908	ev_loop_new (unsigned int flags)	2105	ev_loop_new (unsigned int flags)
1909	{	2106	{
1910	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2107	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1911		2108
1912	memset (EV_A, 0, sizeof (struct ev_loop));	2109	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
1920	}	2117	}
1921		2118
1922	#endif /* multiplicity */	2119	#endif /* multiplicity */
1923		2120
1924	#if EV_VERIFY	2121	#if EV_VERIFY
1925	static void noinline	2122	static void noinline ecb_cold
1926	verify_watcher (EV_P_ W w)	2123	verify_watcher (EV_P_ W w)
1927	{	2124	{
1928	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2125	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1929		2126
1930	if (w->pending)	2127	if (w->pending)
1931	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2128	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1932	}	2129	}
1933		2130
1934	static void noinline	2131	static void noinline ecb_cold
1935	verify_heap (EV_P_ ANHE *heap, int N)	2132	verify_heap (EV_P_ ANHE *heap, int N)
1936	{	2133	{
1937	int i;	2134	int i;
1938		2135
1939	for (i = HEAP0; i < N + HEAP0; ++i)	2136	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1944		2141
1945	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2142	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1946	}	2143	}
1947	}	2144	}
1948		2145
1949	static void noinline	2146	static void noinline ecb_cold
1950	array_verify (EV_P_ W *ws, int cnt)	2147	array_verify (EV_P_ W *ws, int cnt)
1951	{	2148	{
1952	while (cnt--)	2149	while (cnt--)
1953	{	2150	{
1954	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2151	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1956	}	2153	}
1957	}	2154	}
1958	#endif	2155	#endif
1959		2156
1960	#if EV_FEATURE_API	2157	#if EV_FEATURE_API
1961	void	2158	void ecb_cold
1962	ev_verify (EV_P)	2159	ev_verify (EV_P)
1963	{	2160	{
1964	#if EV_VERIFY	2161	#if EV_VERIFY
1965	int i;	2162	int i;
1966	WL w;	2163	WL w;
…		…
2032	#endif	2229	#endif
2033	}	2230	}
2034	#endif	2231	#endif
2035		2232
2036	#if EV_MULTIPLICITY	2233	#if EV_MULTIPLICITY
2037	struct ev_loop *	2234	struct ev_loop * ecb_cold
2038	#else	2235	#else
2039	int	2236	int
2040	#endif	2237	#endif
2041	ev_default_loop (unsigned int flags)	2238	ev_default_loop (unsigned int flags)
2042	{	2239	{
…		…
2100	for (pri = NUMPRI; pri--; )	2297	for (pri = NUMPRI; pri--; )
2101	while (pendingcnt [pri])	2298	while (pendingcnt [pri])
2102	{	2299	{
2103	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2300	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2104		2301
2105	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2106	/* ^ this is no longer true, as pending_w could be here */
2107
2108	p->w->pending = 0;	2302	p->w->pending = 0;
2109	EV_CB_INVOKE (p->w, p->events);	2303	EV_CB_INVOKE (p->w, p->events);
2110	EV_FREQUENT_CHECK;	2304	EV_FREQUENT_CHECK;
2111	}	2305	}
2112	}	2306	}
…		…
2173	feed_reverse_done (EV_A_ EV_TIMER);	2367	feed_reverse_done (EV_A_ EV_TIMER);
2174	}	2368	}
2175	}	2369	}
2176		2370
2177	#if EV_PERIODIC_ENABLE	2371	#if EV_PERIODIC_ENABLE
		2372
		2373	static void noinline
		2374	periodic_recalc (EV_P_ ev_periodic *w)
		2375	{
		2376	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2377	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2378
		2379	/* the above almost always errs on the low side */
		2380	while (at <= ev_rt_now)
		2381	{
		2382	ev_tstamp nat = at + w->interval;
		2383
		2384	/* when resolution fails us, we use ev_rt_now */
		2385	if (expect_false (nat == at))
		2386	{
		2387	at = ev_rt_now;
		2388	break;
		2389	}
		2390
		2391	at = nat;
		2392	}
		2393
		2394	ev_at (w) = at;
		2395	}
		2396
2178	/* make periodics pending */	2397	/* make periodics pending */
2179	inline_size void	2398	inline_size void
2180	periodics_reify (EV_P)	2399	periodics_reify (EV_P)
2181	{	2400	{
2182	EV_FREQUENT_CHECK;	2401	EV_FREQUENT_CHECK;
…		…
2201	ANHE_at_cache (periodics [HEAP0]);	2420	ANHE_at_cache (periodics [HEAP0]);
2202	downheap (periodics, periodiccnt, HEAP0);	2421	downheap (periodics, periodiccnt, HEAP0);
2203	}	2422	}
2204	else if (w->interval)	2423	else if (w->interval)
2205	{	2424	{
2206	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2425	periodic_recalc (EV_A_ w);
2207	/* if next trigger time is not sufficiently in the future, put it there */
2208	/* this might happen because of floating point inexactness */
2209	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2210	{
2211	ev_at (w) += w->interval;
2212
2213	/* if interval is unreasonably low we might still have a time in the past */
2214	/* so correct this. this will make the periodic very inexact, but the user */
2215	/* has effectively asked to get triggered more often than possible */
2216	if (ev_at (w) < ev_rt_now)
2217	ev_at (w) = ev_rt_now;
2218	}
2219
2220	ANHE_at_cache (periodics [HEAP0]);	2426	ANHE_at_cache (periodics [HEAP0]);
2221	downheap (periodics, periodiccnt, HEAP0);	2427	downheap (periodics, periodiccnt, HEAP0);
2222	}	2428	}
2223	else	2429	else
2224	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2430	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2232	}	2438	}
2233	}	2439	}
2234		2440
2235	/* simply recalculate all periodics */	2441	/* simply recalculate all periodics */
2236	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2442	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2237	static void noinline	2443	static void noinline ecb_cold
2238	periodics_reschedule (EV_P)	2444	periodics_reschedule (EV_P)
2239	{	2445	{
2240	int i;	2446	int i;
2241		2447
2242	/* adjust periodics after time jump */	2448	/* adjust periodics after time jump */
…		…
2245	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2451	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2246		2452
2247	if (w->reschedule_cb)	2453	if (w->reschedule_cb)
2248	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2454	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2249	else if (w->interval)	2455	else if (w->interval)
2250	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2456	periodic_recalc (EV_A_ w);
2251		2457
2252	ANHE_at_cache (periodics [i]);	2458	ANHE_at_cache (periodics [i]);
2253	}	2459	}
2254		2460
2255	reheap (periodics, periodiccnt);	2461	reheap (periodics, periodiccnt);
2256	}	2462	}
2257	#endif	2463	#endif
2258		2464
2259	/* adjust all timers by a given offset */	2465	/* adjust all timers by a given offset */
2260	static void noinline	2466	static void noinline ecb_cold
2261	timers_reschedule (EV_P_ ev_tstamp adjust)	2467	timers_reschedule (EV_P_ ev_tstamp adjust)
2262	{	2468	{
2263	int i;	2469	int i;
2264		2470
2265	for (i = 0; i < timercnt; ++i)	2471	for (i = 0; i < timercnt; ++i)
…		…
2302	* doesn't hurt either as we only do this on time-jumps or	2508	* doesn't hurt either as we only do this on time-jumps or
2303	* in the unlikely event of having been preempted here.	2509	* in the unlikely event of having been preempted here.
2304	*/	2510	*/
2305	for (i = 4; --i; )	2511	for (i = 4; --i; )
2306	{	2512	{
		2513	ev_tstamp diff;
2307	rtmn_diff = ev_rt_now - mn_now;	2514	rtmn_diff = ev_rt_now - mn_now;
2308		2515
		2516	diff = odiff - rtmn_diff;
		2517
2309	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2518	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2310	return; /* all is well */	2519	return; /* all is well */
2311		2520
2312	ev_rt_now = ev_time ();	2521	ev_rt_now = ev_time ();
2313	mn_now = get_clock ();	2522	mn_now = get_clock ();
2314	now_floor = mn_now;	2523	now_floor = mn_now;
…		…
2404	ev_tstamp prev_mn_now = mn_now;	2613	ev_tstamp prev_mn_now = mn_now;
2405		2614
2406	/* update time to cancel out callback processing overhead */	2615	/* update time to cancel out callback processing overhead */
2407	time_update (EV_A_ 1e100);	2616	time_update (EV_A_ 1e100);
2408		2617
		2618	/* from now on, we want a pipe-wake-up */
		2619	pipe_write_wanted = 1;
		2620
		2621	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2622
2409	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2623	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2410	{	2624	{
2411	waittime = MAX_BLOCKTIME;	2625	waittime = MAX_BLOCKTIME;
2412		2626
2413	if (timercnt)	2627	if (timercnt)
2414	{	2628	{
2415	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2629	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2416	if (waittime > to) waittime = to;	2630	if (waittime > to) waittime = to;
2417	}	2631	}
2418		2632
2419	#if EV_PERIODIC_ENABLE	2633	#if EV_PERIODIC_ENABLE
2420	if (periodiccnt)	2634	if (periodiccnt)
2421	{	2635	{
2422	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2636	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2423	if (waittime > to) waittime = to;	2637	if (waittime > to) waittime = to;
2424	}	2638	}
2425	#endif	2639	#endif
2426		2640
2427	/* don't let timeouts decrease the waittime below timeout_blocktime */	2641	/* don't let timeouts decrease the waittime below timeout_blocktime */
2428	if (expect_false (waittime < timeout_blocktime))	2642	if (expect_false (waittime < timeout_blocktime))
2429	waittime = timeout_blocktime;	2643	waittime = timeout_blocktime;
		2644
		2645	/* at this point, we NEED to wait, so we have to ensure */
		2646	/* to pass a minimum nonzero value to the backend */
		2647	if (expect_false (waittime < backend_mintime))
		2648	waittime = backend_mintime;
2430		2649
2431	/* extra check because io_blocktime is commonly 0 */	2650	/* extra check because io_blocktime is commonly 0 */
2432	if (expect_false (io_blocktime))	2651	if (expect_false (io_blocktime))
2433	{	2652	{
2434	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2653	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2435		2654
2436	if (sleeptime > waittime - backend_fudge)	2655	if (sleeptime > waittime - backend_mintime)
2437	sleeptime = waittime - backend_fudge;	2656	sleeptime = waittime - backend_mintime;
2438		2657
2439	if (expect_true (sleeptime > 0.))	2658	if (expect_true (sleeptime > 0.))
2440	{	2659	{
2441	ev_sleep (sleeptime);	2660	ev_sleep (sleeptime);
2442	waittime -= sleeptime;	2661	waittime -= sleeptime;
…		…
2448	++loop_count;	2667	++loop_count;
2449	#endif	2668	#endif
2450	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2669	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2451	backend_poll (EV_A_ waittime);	2670	backend_poll (EV_A_ waittime);
2452	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2671	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2672
		2673	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2674
		2675	if (pipe_write_skipped)
		2676	{
		2677	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2678	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2679	}
		2680
2453		2681
2454	/* update ev_rt_now, do magic */	2682	/* update ev_rt_now, do magic */
2455	time_update (EV_A_ waittime + sleeptime);	2683	time_update (EV_A_ waittime + sleeptime);
2456	}	2684	}
2457		2685
…		…
2747	if (w->reschedule_cb)	2975	if (w->reschedule_cb)
2748	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2976	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2749	else if (w->interval)	2977	else if (w->interval)
2750	{	2978	{
2751	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2979	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2752	/* this formula differs from the one in periodic_reify because we do not always round up */	2980	periodic_recalc (EV_A_ w);
2753	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2754	}	2981	}
2755	else	2982	else
2756	ev_at (w) = w->offset;	2983	ev_at (w) = w->offset;
2757		2984
2758	EV_FREQUENT_CHECK;	2985	EV_FREQUENT_CHECK;
…		…
2879	sa.sa_handler = ev_sighandler;	3106	sa.sa_handler = ev_sighandler;
2880	sigfillset (&sa.sa_mask);	3107	sigfillset (&sa.sa_mask);
2881	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3108	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2882	sigaction (w->signum, &sa, 0);	3109	sigaction (w->signum, &sa, 0);
2883		3110
		3111	if (origflags & EVFLAG_NOSIGMASK)
		3112	{
2884	sigemptyset (&sa.sa_mask);	3113	sigemptyset (&sa.sa_mask);
2885	sigaddset (&sa.sa_mask, w->signum);	3114	sigaddset (&sa.sa_mask, w->signum);
2886	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3115	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3116	}
2887	#endif	3117	#endif
2888	}	3118	}
2889		3119
2890	EV_FREQUENT_CHECK;	3120	EV_FREQUENT_CHECK;
2891	}	3121	}
…		…
3032	if (!pend \|\| pend == path)	3262	if (!pend \|\| pend == path)
3033	break;	3263	break;
3034		3264
3035	*pend = 0;	3265	*pend = 0;
3036	w->wd = inotify_add_watch (fs_fd, path, mask);	3266	w->wd = inotify_add_watch (fs_fd, path, mask);
3037	}	3267	}
3038	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3268	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3039	}	3269	}
3040	}	3270	}
3041		3271
3042	if (w->wd >= 0)	3272	if (w->wd >= 0)
…		…
3109	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3339	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3110	ofs += sizeof (struct inotify_event) + ev->len;	3340	ofs += sizeof (struct inotify_event) + ev->len;
3111	}	3341	}
3112	}	3342	}
3113		3343
3114	inline_size void	3344	inline_size void ecb_cold
3115	ev_check_2625 (EV_P)	3345	ev_check_2625 (EV_P)
3116	{	3346	{
3117	/* kernels < 2.6.25 are borked	3347	/* kernels < 2.6.25 are borked
3118	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3348	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3119	*/	3349	*/
…		…
3744	}	3974	}
3745		3975
3746	/*****************************************************************************/	3976	/*****************************************************************************/
3747		3977
3748	#if EV_WALK_ENABLE	3978	#if EV_WALK_ENABLE
3749	void	3979	void ecb_cold
3750	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3980	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3751	{	3981	{
3752	int i, j;	3982	int i, j;
3753	ev_watcher_list wl, wn;	3983	ev_watcher_list wl, wn;
3754		3984

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.365 by root, Sun Oct 31 22:01:20 2010 UTC vs. Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.365 by root, Sun Oct 31 22:01:20 2010 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC