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

Comparing libev/ev.c (file contents):
Revision 1.355 by root, Fri Oct 22 10:09:12 2010 UTC vs.
Revision 1.389 by root, Wed Aug 3 15:31:23 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
387	# include <sys/utsname.h>
388	# include <sys/statfs.h>	397	# include <sys/statfs.h>
389	# include <sys/inotify.h>	398	# include <sys/inotify.h>
390	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	399	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391	# ifndef IN_DONT_FOLLOW	400	# ifndef IN_DONT_FOLLOW
392	# undef EV_USE_INOTIFY	401	# undef EV_USE_INOTIFY
…		…
443	#else	452	#else
444	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
445	#endif	454	#endif
446		455
447	/*	456	/*
448	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
449	* It is added to ev_rt_now when scheduling periodics
450	* to ensure progress, time-wise, even when rounding
451	* errors are against us.
452	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
453	* Better solutions welcome.
454	*/	459	*/
455	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	460	#define MIN_INTERVAL 0.0001220703125 /* 1/2*13, good till 4000 /
		461	/#define MIN_INTERVAL 0.00000095367431640625 / 1/2*20, good till 2200 /
456		462
457	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	463	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	464	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459		465
460	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)	466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)	467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462		468
463	#if __GNUC__ >= 4	469	/* the following are taken from libecb */
464	# define expect(expr,value) __builtin_expect ((expr),(value))	470	/* ecb.h start */
465	# define noinline __attribute__ ((noinline))	471
		472	/* many compilers define _GNUC_ to some versions but then only implement
		473	* what their idiot authors think are the "more important" extensions,
		474	* causing enourmous grief in return for some better fake benchmark numbers.
		475	* or so.
		476	* we try to detect these and simply assume they are not gcc - if they have
		477	* an issue with that they should have done it right in the first place.
		478	*/
		479	#ifndef ECB_GCC_VERSION
		480	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)
		481	#define ECB_GCC_VERSION(major,minor) 0
		482	#else
		483	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		484	#endif
		485	#endif
		486
		487	#if __cplusplus
		488	#define ecb_inline static inline
		489	#elif ECB_GCC_VERSION(2,5)
		490	#define ecb_inline static __inline__
		491	#elif ECB_C99
		492	#define ecb_inline static inline
466	#else	493	#else
467	# define expect(expr,value) (expr)	494	#define ecb_inline static
468	# define noinline
469	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470	# define inline
471	# endif	495	#endif
		496
		497	#ifndef ECB_MEMORY_FENCE
		498	#if ECB_GCC_VERSION(2,5)
		499	#if __x86
		500	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		501	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		502	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* 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
472	#endif	508	#endif
		509	#endif
473		510
		511	#ifndef ECB_MEMORY_FENCE
		512	#if ECB_GCC_VERSION(4,4)
		513	#define ECB_MEMORY_FENCE __sync_synchronize ()
		514	#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
		515	#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
		516	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		517	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		518	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		519	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		520	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		521	#elif defined(_WIN32)
		522	#include <WinNT.h>
		523	#define ECB_MEMORY_FENCE MemoryBarrier ()
		524	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		525	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		526	#endif
		527	#endif
		528
		529	#ifndef ECB_MEMORY_FENCE
		530	#include <pthread.h>
		531
		532	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		533	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		534	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		535	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		536	#endif
		537
		538	#if ECB_GCC_VERSION(3,1)
		539	#define ecb_attribute(attrlist) __attribute__(attrlist)
		540	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		541	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		542	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		543	#else
		544	#define ecb_attribute(attrlist)
		545	#define ecb_is_constant(expr) 0
		546	#define ecb_expect(expr,value) (expr)
		547	#define ecb_prefetch(addr,rw,locality)
		548	#endif
		549
		550	#define ecb_noinline ecb_attribute ((__noinline__))
		551	#define ecb_noreturn ecb_attribute ((__noreturn__))
		552	#define ecb_unused ecb_attribute ((__unused__))
		553	#define ecb_const ecb_attribute ((__const__))
		554	#define ecb_pure ecb_attribute ((__pure__))
		555
		556	#if ECB_GCC_VERSION(4,3)
		557	#define ecb_artificial ecb_attribute ((__artificial__))
		558	#define ecb_hot ecb_attribute ((__hot__))
		559	#define ecb_cold ecb_attribute ((__cold__))
		560	#else
		561	#define ecb_artificial
		562	#define ecb_hot
		563	#define ecb_cold
		564	#endif
		565
		566	/* put around conditional expressions if you are very sure that the */
		567	/* expression is mostly true or mostly false. note that these return */
		568	/* booleans, not the expression. */
474	#define expect_false(expr) expect ((expr) != 0, 0)	569	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475	#define expect_true(expr) expect ((expr) != 0, 1)	570	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		571	/* ecb.h end */
		572
		573	#define expect_false(cond) ecb_expect_false (cond)
		574	#define expect_true(cond) ecb_expect_true (cond)
		575	#define noinline ecb_noinline
		576
476	#define inline_size static inline	577	#define inline_size ecb_inline
477		578
478	#if EV_FEATURE_CODE	579	#if EV_FEATURE_CODE
479	# define inline_speed static inline	580	# define inline_speed ecb_inline
480	#else	581	#else
481	# define inline_speed static noinline	582	# define inline_speed static noinline
482	#endif	583	#endif
483		584
484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	585	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
523	# include "ev_win32.c"	624	# include "ev_win32.c"
524	#endif	625	#endif
525		626
526	/*****************************************************************************/	627	/*****************************************************************************/
527		628
		629	/* define a suitable floor function (only used by periodics atm) */
		630
		631	#if EV_USE_FLOOR
		632	# include <math.h>
		633	# define ev_floor(v) floor (v)
		634	#else
		635
		636	#include <float.h>
		637
		638	/* a floor() replacement function, should be independent of ev_tstamp type */
		639	static ev_tstamp noinline
		640	ev_floor (ev_tstamp v)
		641	{
		642	/* the choice of shift factor is not terribly important */
		643	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		644	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		645	#else
		646	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		647	#endif
		648
		649	/* argument too large for an unsigned long? */
		650	if (expect_false (v >= shift))
		651	{
		652	ev_tstamp f;
		653
		654	if (v == v - 1.)
		655	return v; /* very large number */
		656
		657	f = shift * ev_floor (v * (1. / shift));
		658	return f + ev_floor (v - f);
		659	}
		660
		661	/* special treatment for negative args? */
		662	if (expect_false (v < 0.))
		663	{
		664	ev_tstamp f = -ev_floor (-v);
		665
		666	return f - (f == v ? 0 : 1);
		667	}
		668
		669	/* fits into an unsigned long */
		670	return (unsigned long)v;
		671	}
		672
		673	#endif
		674
		675	/*****************************************************************************/
		676
		677	#ifdef __linux
		678	# include <sys/utsname.h>
		679	#endif
		680
528	static unsigned int noinline	681	static unsigned int noinline ecb_cold
529	ev_linux_version (void)	682	ev_linux_version (void)
530	{	683	{
531	#ifdef __linux	684	#ifdef __linux
		685	unsigned int v = 0;
532	struct utsname buf;	686	struct utsname buf;
533	unsigned int v;
534	int i;	687	int i;
535	char *p = buf.release;	688	char *p = buf.release;
536		689
537	if (uname (&buf))	690	if (uname (&buf))
538	return 0;	691	return 0;
…		…
562	}	715	}
563		716
564	/*****************************************************************************/	717	/*****************************************************************************/
565		718
566	#if EV_AVOID_STDIO	719	#if EV_AVOID_STDIO
567	static void noinline	720	static void noinline ecb_cold
568	ev_printerr (const char *msg)	721	ev_printerr (const char *msg)
569	{	722	{
570	write (STDERR_FILENO, msg, strlen (msg));	723	write (STDERR_FILENO, msg, strlen (msg));
571	}	724	}
572	#endif	725	#endif
573		726
574	static void (syserr_cb)(const char msg);	727	static void (syserr_cb)(const char msg);
575		728
576	void	729	void ecb_cold
577	ev_set_syserr_cb (void (cb)(const char msg))	730	ev_set_syserr_cb (void (cb)(const char msg))
578	{	731	{
579	syserr_cb = cb;	732	syserr_cb = cb;
580	}	733	}
581		734
582	static void noinline	735	static void noinline ecb_cold
583	ev_syserr (const char *msg)	736	ev_syserr (const char *msg)
584	{	737	{
585	if (!msg)	738	if (!msg)
586	msg = "(libev) system error";	739	msg = "(libev) system error";
587		740
588	if (syserr_cb)	741	if (syserr_cb)
589	syserr_cb (msg);	742	syserr_cb (msg);
590	else	743	else
591	{	744	{
592	#if EV_AVOID_STDIO	745	#if EV_AVOID_STDIO
593	const char *err = strerror (errno);
594
595	ev_printerr (msg);	746	ev_printerr (msg);
596	ev_printerr (": ");	747	ev_printerr (": ");
597	ev_printerr (err);	748	ev_printerr (strerror (errno));
598	ev_printerr ("\n");	749	ev_printerr ("\n");
599	#else	750	#else
600	perror (msg);	751	perror (msg);
601	#endif	752	#endif
602	abort ();	753	abort ();
…		…
622	#endif	773	#endif
623	}	774	}
624		775
625	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	776	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
626		777
627	void	778	void ecb_cold
628	ev_set_allocator (void (cb)(void *ptr, long size))	779	ev_set_allocator (void (cb)(void *ptr, long size))
629	{	780	{
630	alloc = cb;	781	alloc = cb;
631	}	782	}
632		783
…		…
636	ptr = alloc (ptr, size);	787	ptr = alloc (ptr, size);
637		788
638	if (!ptr && size)	789	if (!ptr && size)
639	{	790	{
640	#if EV_AVOID_STDIO	791	#if EV_AVOID_STDIO
641	ev_printerr ("libev: memory allocation failed, aborting.\n");	792	ev_printerr ("(libev) memory allocation failed, aborting.\n");
642	#else	793	#else
643	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	794	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
644	#endif	795	#endif
645	abort ();	796	abort ();
646	}	797	}
647		798
648	return ptr;	799	return ptr;
…		…
665	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	816	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
666	unsigned char unused;	817	unsigned char unused;
667	#if EV_USE_EPOLL	818	#if EV_USE_EPOLL
668	unsigned int egen; /* generation counter to counter epoll bugs */	819	unsigned int egen; /* generation counter to counter epoll bugs */
669	#endif	820	#endif
670	#if EV_SELECT_IS_WINSOCKET	821	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
671	SOCKET handle;	822	SOCKET handle;
		823	#endif
		824	#if EV_USE_IOCP
		825	OVERLAPPED or, ow;
672	#endif	826	#endif
673	} ANFD;	827	} ANFD;
674		828
675	/* stores the pending event set for a given watcher */	829	/* stores the pending event set for a given watcher */
676	typedef struct	830	typedef struct
…		…
838	}	992	}
839		993
840	return ncur;	994	return ncur;
841	}	995	}
842		996
843	static noinline void *	997	static void * noinline ecb_cold
844	array_realloc (int elem, void base, int cur, int cnt)	998	array_realloc (int elem, void base, int cur, int cnt)
845	{	999	{
846	cur = array_nextsize (elem, cur, cnt);	1000	cur = array_nextsize (elem, cur, cnt);
847	return ev_realloc (base, elem * *cur);	1001	return ev_realloc (base, elem * *cur);
848	}	1002	}
…		…
851	memset ((void )(base), 0, sizeof ((base)) * (count))	1005	memset ((void )(base), 0, sizeof ((base)) * (count))
852		1006
853	#define array_needsize(type,base,cur,cnt,init) \	1007	#define array_needsize(type,base,cur,cnt,init) \
854	if (expect_false ((cnt) > (cur))) \	1008	if (expect_false ((cnt) > (cur))) \
855	{ \	1009	{ \
856	int ocur_ = (cur); \	1010	int ecb_unused ocur_ = (cur); \
857	(base) = (type *)array_realloc \	1011	(base) = (type *)array_realloc \
858	(sizeof (type), (base), &(cur), (cnt)); \	1012	(sizeof (type), (base), &(cur), (cnt)); \
859	init ((base) + (ocur_), (cur) - ocur_); \	1013	init ((base) + (ocur_), (cur) - ocur_); \
860	}	1014	}
861		1015
…		…
961	inline_size void	1115	inline_size void
962	fd_reify (EV_P)	1116	fd_reify (EV_P)
963	{	1117	{
964	int i;	1118	int i;
965		1119
		1120	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1121	for (i = 0; i < fdchangecnt; ++i)
		1122	{
		1123	int fd = fdchanges [i];
		1124	ANFD *anfd = anfds + fd;
		1125
		1126	if (anfd->reify & EV__IOFDSET && anfd->head)
		1127	{
		1128	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1129
		1130	if (handle != anfd->handle)
		1131	{
		1132	unsigned long arg;
		1133
		1134	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1135
		1136	/* handle changed, but fd didn't - we need to do it in two steps */
		1137	backend_modify (EV_A_ fd, anfd->events, 0);
		1138	anfd->events = 0;
		1139	anfd->handle = handle;
		1140	}
		1141	}
		1142	}
		1143	#endif
		1144
966	for (i = 0; i < fdchangecnt; ++i)	1145	for (i = 0; i < fdchangecnt; ++i)
967	{	1146	{
968	int fd = fdchanges [i];	1147	int fd = fdchanges [i];
969	ANFD *anfd = anfds + fd;	1148	ANFD *anfd = anfds + fd;
970	ev_io *w;	1149	ev_io *w;
…		…
972	unsigned char o_events = anfd->events;	1151	unsigned char o_events = anfd->events;
973	unsigned char o_reify = anfd->reify;	1152	unsigned char o_reify = anfd->reify;
974		1153
975	anfd->reify = 0;	1154	anfd->reify = 0;
976		1155
977	#if EV_SELECT_IS_WINSOCKET
978	if (o_reify & EV__IOFDSET)
979	{
980	unsigned long arg;
981	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
982	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
983	}
984	#endif
985
986	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1156	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
987	{	1157	{
988	anfd->events = 0;	1158	anfd->events = 0;
989		1159
990	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1160	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1015	fdchanges [fdchangecnt - 1] = fd;	1185	fdchanges [fdchangecnt - 1] = fd;
1016	}	1186	}
1017	}	1187	}
1018		1188
1019	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1189	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1020	inline_speed void	1190	inline_speed void ecb_cold
1021	fd_kill (EV_P_ int fd)	1191	fd_kill (EV_P_ int fd)
1022	{	1192	{
1023	ev_io *w;	1193	ev_io *w;
1024		1194
1025	while ((w = (ev_io *)anfds [fd].head))	1195	while ((w = (ev_io *)anfds [fd].head))
…		…
1028	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1198	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1029	}	1199	}
1030	}	1200	}
1031		1201
1032	/* check whether the given fd is actually valid, for error recovery */	1202	/* check whether the given fd is actually valid, for error recovery */
1033	inline_size int	1203	inline_size int ecb_cold
1034	fd_valid (int fd)	1204	fd_valid (int fd)
1035	{	1205	{
1036	#ifdef _WIN32	1206	#ifdef _WIN32
1037	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1207	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1038	#else	1208	#else
1039	return fcntl (fd, F_GETFD) != -1;	1209	return fcntl (fd, F_GETFD) != -1;
1040	#endif	1210	#endif
1041	}	1211	}
1042		1212
1043	/* called on EBADF to verify fds */	1213	/* called on EBADF to verify fds */
1044	static void noinline	1214	static void noinline ecb_cold
1045	fd_ebadf (EV_P)	1215	fd_ebadf (EV_P)
1046	{	1216	{
1047	int fd;	1217	int fd;
1048		1218
1049	for (fd = 0; fd < anfdmax; ++fd)	1219	for (fd = 0; fd < anfdmax; ++fd)
…		…
1051	if (!fd_valid (fd) && errno == EBADF)	1221	if (!fd_valid (fd) && errno == EBADF)
1052	fd_kill (EV_A_ fd);	1222	fd_kill (EV_A_ fd);
1053	}	1223	}
1054		1224
1055	/* called on ENOMEM in select/poll to kill some fds and retry */	1225	/* called on ENOMEM in select/poll to kill some fds and retry */
1056	static void noinline	1226	static void noinline ecb_cold
1057	fd_enomem (EV_P)	1227	fd_enomem (EV_P)
1058	{	1228	{
1059	int fd;	1229	int fd;
1060		1230
1061	for (fd = anfdmax; fd--; )	1231	for (fd = anfdmax; fd--; )
…		…
1256		1426
1257	/*****************************************************************************/	1427	/*****************************************************************************/
1258		1428
1259	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1429	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1260		1430
1261	static void noinline	1431	static void noinline ecb_cold
1262	evpipe_init (EV_P)	1432	evpipe_init (EV_P)
1263	{	1433	{
1264	if (!ev_is_active (&pipe_w))	1434	if (!ev_is_active (&pipe_w))
1265	{	1435	{
1266	# if EV_USE_EVENTFD	1436	# if EV_USE_EVENTFD
…		…
1288	ev_io_start (EV_A_ &pipe_w);	1458	ev_io_start (EV_A_ &pipe_w);
1289	ev_unref (EV_A); /* watcher should not keep loop alive */	1459	ev_unref (EV_A); /* watcher should not keep loop alive */
1290	}	1460	}
1291	}	1461	}
1292		1462
1293	inline_size void	1463	inline_speed void
1294	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1464	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1295	{	1465	{
1296	if (!*flag)	1466	if (expect_true (*flag))
		1467	return;
		1468
		1469	*flag = 1;
		1470
		1471	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1472
		1473	pipe_write_skipped = 1;
		1474
		1475	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1476
		1477	if (pipe_write_wanted)
1297	{	1478	{
		1479	int old_errno;
		1480
		1481	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1482
1298	int old_errno = errno; /* save errno because write might clobber it */	1483	old_errno = errno; /* save errno because write will clobber it */
1299	char dummy;
1300
1301	*flag = 1;
1302		1484
1303	#if EV_USE_EVENTFD	1485	#if EV_USE_EVENTFD
1304	if (evfd >= 0)	1486	if (evfd >= 0)
1305	{	1487	{
1306	uint64_t counter = 1;	1488	uint64_t counter = 1;
1307	write (evfd, &counter, sizeof (uint64_t));	1489	write (evfd, &counter, sizeof (uint64_t));
1308	}	1490	}
1309	else	1491	else
1310	#endif	1492	#endif
		1493	{
1311	/* win32 people keep sending patches that change this write() to send() */	1494	/* win32 people keep sending patches that change this write() to send() */
1312	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1495	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1313	/* so when you think this write should be a send instead, please find out */	1496	/* so when you think this write should be a send instead, please find out */
1314	/* where your send() is from - it's definitely not the microsoft send, and */	1497	/* where your send() is from - it's definitely not the microsoft send, and */
1315	/* tell me. thank you. */	1498	/* tell me. thank you. */
1316	write (evpipe [1], &dummy, 1);	1499	write (evpipe [1], &(evpipe [1]), 1);
		1500	}
1317		1501
1318	errno = old_errno;	1502	errno = old_errno;
1319	}	1503	}
1320	}	1504	}
1321		1505
…		…
1324	static void	1508	static void
1325	pipecb (EV_P_ ev_io *iow, int revents)	1509	pipecb (EV_P_ ev_io *iow, int revents)
1326	{	1510	{
1327	int i;	1511	int i;
1328		1512
		1513	if (revents & EV_READ)
		1514	{
1329	#if EV_USE_EVENTFD	1515	#if EV_USE_EVENTFD
1330	if (evfd >= 0)	1516	if (evfd >= 0)
1331	{	1517	{
1332	uint64_t counter;	1518	uint64_t counter;
1333	read (evfd, &counter, sizeof (uint64_t));	1519	read (evfd, &counter, sizeof (uint64_t));
1334	}	1520	}
1335	else	1521	else
1336	#endif	1522	#endif
1337	{	1523	{
1338	char dummy;	1524	char dummy;
1339	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1525	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1340	read (evpipe [0], &dummy, 1);	1526	read (evpipe [0], &dummy, 1);
		1527	}
1341	}	1528	}
1342		1529
		1530	pipe_write_skipped = 0;
		1531
		1532	#if EV_SIGNAL_ENABLE
1343	if (sig_pending)	1533	if (sig_pending)
1344	{	1534	{
1345	sig_pending = 0;	1535	sig_pending = 0;
1346		1536
1347	for (i = EV_NSIG - 1; i--; )	1537	for (i = EV_NSIG - 1; i--; )
1348	if (expect_false (signals [i].pending))	1538	if (expect_false (signals [i].pending))
1349	ev_feed_signal_event (EV_A_ i + 1);	1539	ev_feed_signal_event (EV_A_ i + 1);
1350	}	1540	}
		1541	#endif
1351		1542
1352	#if EV_ASYNC_ENABLE	1543	#if EV_ASYNC_ENABLE
1353	if (async_pending)	1544	if (async_pending)
1354	{	1545	{
1355	async_pending = 0;	1546	async_pending = 0;
…		…
1364	#endif	1555	#endif
1365	}	1556	}
1366		1557
1367	/*****************************************************************************/	1558	/*****************************************************************************/
1368		1559
		1560	void
		1561	ev_feed_signal (int signum)
		1562	{
		1563	#if EV_MULTIPLICITY
		1564	EV_P = signals [signum - 1].loop;
		1565
		1566	if (!EV_A)
		1567	return;
		1568	#endif
		1569
		1570	if (!ev_active (&pipe_w))
		1571	return;
		1572
		1573	signals [signum - 1].pending = 1;
		1574	evpipe_write (EV_A_ &sig_pending);
		1575	}
		1576
1369	static void	1577	static void
1370	ev_sighandler (int signum)	1578	ev_sighandler (int signum)
1371	{	1579	{
1372	#if EV_MULTIPLICITY
1373	EV_P = signals [signum - 1].loop;
1374	#endif
1375
1376	#ifdef _WIN32	1580	#ifdef _WIN32
1377	signal (signum, ev_sighandler);	1581	signal (signum, ev_sighandler);
1378	#endif	1582	#endif
1379		1583
1380	signals [signum - 1].pending = 1;	1584	ev_feed_signal (signum);
1381	evpipe_write (EV_A_ &sig_pending);
1382	}	1585	}
1383		1586
1384	void noinline	1587	void noinline
1385	ev_feed_signal_event (EV_P_ int signum)	1588	ev_feed_signal_event (EV_P_ int signum)
1386	{	1589	{
…		…
1486		1689
1487	#endif	1690	#endif
1488		1691
1489	/*****************************************************************************/	1692	/*****************************************************************************/
1490		1693
		1694	#if EV_USE_IOCP
		1695	# include "ev_iocp.c"
		1696	#endif
1491	#if EV_USE_PORT	1697	#if EV_USE_PORT
1492	# include "ev_port.c"	1698	# include "ev_port.c"
1493	#endif	1699	#endif
1494	#if EV_USE_KQUEUE	1700	#if EV_USE_KQUEUE
1495	# include "ev_kqueue.c"	1701	# include "ev_kqueue.c"
…		…
1502	#endif	1708	#endif
1503	#if EV_USE_SELECT	1709	#if EV_USE_SELECT
1504	# include "ev_select.c"	1710	# include "ev_select.c"
1505	#endif	1711	#endif
1506		1712
1507	int	1713	int ecb_cold
1508	ev_version_major (void)	1714	ev_version_major (void)
1509	{	1715	{
1510	return EV_VERSION_MAJOR;	1716	return EV_VERSION_MAJOR;
1511	}	1717	}
1512		1718
1513	int	1719	int ecb_cold
1514	ev_version_minor (void)	1720	ev_version_minor (void)
1515	{	1721	{
1516	return EV_VERSION_MINOR;	1722	return EV_VERSION_MINOR;
1517	}	1723	}
1518		1724
1519	/* return true if we are running with elevated privileges and should ignore env variables */	1725	/* return true if we are running with elevated privileges and should ignore env variables */
1520	int inline_size	1726	int inline_size ecb_cold
1521	enable_secure (void)	1727	enable_secure (void)
1522	{	1728	{
1523	#ifdef _WIN32	1729	#ifdef _WIN32
1524	return 0;	1730	return 0;
1525	#else	1731	#else
1526	return getuid () != geteuid ()	1732	return getuid () != geteuid ()
1527	\|\| getgid () != getegid ();	1733	\|\| getgid () != getegid ();
1528	#endif	1734	#endif
1529	}	1735	}
1530		1736
1531	unsigned int	1737	unsigned int ecb_cold
1532	ev_supported_backends (void)	1738	ev_supported_backends (void)
1533	{	1739	{
1534	unsigned int flags = 0;	1740	unsigned int flags = 0;
1535		1741
1536	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1742	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1540	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1746	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1541		1747
1542	return flags;	1748	return flags;
1543	}	1749	}
1544		1750
1545	unsigned int	1751	unsigned int ecb_cold
1546	ev_recommended_backends (void)	1752	ev_recommended_backends (void)
1547	{	1753	{
1548	unsigned int flags = ev_supported_backends ();	1754	unsigned int flags = ev_supported_backends ();
1549		1755
1550	#ifndef __NetBSD__	1756	#ifndef __NetBSD__
…		…
1562	#endif	1768	#endif
1563		1769
1564	return flags;	1770	return flags;
1565	}	1771	}
1566		1772
1567	unsigned int	1773	unsigned int ecb_cold
1568	ev_embeddable_backends (void)	1774	ev_embeddable_backends (void)
1569	{	1775	{
1570	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1776	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1571		1777
1572	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1778	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1617	ev_userdata (EV_P)	1823	ev_userdata (EV_P)
1618	{	1824	{
1619	return userdata;	1825	return userdata;
1620	}	1826	}
1621		1827
		1828	void
1622	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1829	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1623	{	1830	{
1624	invoke_cb = invoke_pending_cb;	1831	invoke_cb = invoke_pending_cb;
1625	}	1832	}
1626		1833
		1834	void
1627	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1835	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1628	{	1836	{
1629	release_cb = release;	1837	release_cb = release;
1630	acquire_cb = acquire;	1838	acquire_cb = acquire;
1631	}	1839	}
1632	#endif	1840	#endif
1633		1841
1634	/* initialise a loop structure, must be zero-initialised */	1842	/* initialise a loop structure, must be zero-initialised */
1635	static void noinline	1843	static void noinline ecb_cold
1636	loop_init (EV_P_ unsigned int flags)	1844	loop_init (EV_P_ unsigned int flags)
1637	{	1845	{
1638	if (!backend)	1846	if (!backend)
1639	{	1847	{
		1848	origflags = flags;
		1849
1640	#if EV_USE_REALTIME	1850	#if EV_USE_REALTIME
1641	if (!have_realtime)	1851	if (!have_realtime)
1642	{	1852	{
1643	struct timespec ts;	1853	struct timespec ts;
1644		1854
…		…
1666	if (!(flags & EVFLAG_NOENV)	1876	if (!(flags & EVFLAG_NOENV)
1667	&& !enable_secure ()	1877	&& !enable_secure ()
1668	&& getenv ("LIBEV_FLAGS"))	1878	&& getenv ("LIBEV_FLAGS"))
1669	flags = atoi (getenv ("LIBEV_FLAGS"));	1879	flags = atoi (getenv ("LIBEV_FLAGS"));
1670		1880
1671	ev_rt_now = ev_time ();	1881	ev_rt_now = ev_time ();
1672	mn_now = get_clock ();	1882	mn_now = get_clock ();
1673	now_floor = mn_now;	1883	now_floor = mn_now;
1674	rtmn_diff = ev_rt_now - mn_now;	1884	rtmn_diff = ev_rt_now - mn_now;
1675	#if EV_FEATURE_API	1885	#if EV_FEATURE_API
1676	invoke_cb = ev_invoke_pending;	1886	invoke_cb = ev_invoke_pending;
1677	#endif	1887	#endif
1678		1888
1679	io_blocktime = 0.;	1889	io_blocktime = 0.;
1680	timeout_blocktime = 0.;	1890	timeout_blocktime = 0.;
1681	backend = 0;	1891	backend = 0;
1682	backend_fd = -1;	1892	backend_fd = -1;
1683	sig_pending = 0;	1893	sig_pending = 0;
1684	#if EV_ASYNC_ENABLE	1894	#if EV_ASYNC_ENABLE
1685	async_pending = 0;	1895	async_pending = 0;
1686	#endif	1896	#endif
		1897	pipe_write_skipped = 0;
		1898	pipe_write_wanted = 0;
1687	#if EV_USE_INOTIFY	1899	#if EV_USE_INOTIFY
1688	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1900	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1689	#endif	1901	#endif
1690	#if EV_USE_SIGNALFD	1902	#if EV_USE_SIGNALFD
1691	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1903	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692	#endif	1904	#endif
1693		1905
1694	if (!(flags & 0x0000ffffU))	1906	if (!(flags & EVBACKEND_MASK))
1695	flags \|= ev_recommended_backends ();	1907	flags \|= ev_recommended_backends ();
1696		1908
		1909	#if EV_USE_IOCP
		1910	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1911	#endif
1697	#if EV_USE_PORT	1912	#if EV_USE_PORT
1698	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1913	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699	#endif	1914	#endif
1700	#if EV_USE_KQUEUE	1915	#if EV_USE_KQUEUE
1701	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1916	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1718	#endif	1933	#endif
1719	}	1934	}
1720	}	1935	}
1721		1936
1722	/* free up a loop structure */	1937	/* free up a loop structure */
1723	static void noinline	1938	void ecb_cold
1724	loop_destroy (EV_P)	1939	ev_loop_destroy (EV_P)
1725	{	1940	{
1726	int i;	1941	int i;
		1942
		1943	#if EV_MULTIPLICITY
		1944	/* mimic free (0) */
		1945	if (!EV_A)
		1946	return;
		1947	#endif
		1948
		1949	#if EV_CLEANUP_ENABLE
		1950	/* queue cleanup watchers (and execute them) */
		1951	if (expect_false (cleanupcnt))
		1952	{
		1953	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1954	EV_INVOKE_PENDING;
		1955	}
		1956	#endif
		1957
		1958	#if EV_CHILD_ENABLE
		1959	if (ev_is_active (&childev))
		1960	{
		1961	ev_ref (EV_A); /* child watcher */
		1962	ev_signal_stop (EV_A_ &childev);
		1963	}
		1964	#endif
1727		1965
1728	if (ev_is_active (&pipe_w))	1966	if (ev_is_active (&pipe_w))
1729	{	1967	{
1730	/ev_ref (EV_A);/	1968	/ev_ref (EV_A);/
1731	/ev_io_stop (EV_A_ &pipe_w);/	1969	/ev_io_stop (EV_A_ &pipe_w);/
…		…
1753	#endif	1991	#endif
1754		1992
1755	if (backend_fd >= 0)	1993	if (backend_fd >= 0)
1756	close (backend_fd);	1994	close (backend_fd);
1757		1995
		1996	#if EV_USE_IOCP
		1997	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1998	#endif
1758	#if EV_USE_PORT	1999	#if EV_USE_PORT
1759	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	2000	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760	#endif	2001	#endif
1761	#if EV_USE_KQUEUE	2002	#if EV_USE_KQUEUE
1762	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	2003	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1789	array_free (periodic, EMPTY);	2030	array_free (periodic, EMPTY);
1790	#endif	2031	#endif
1791	#if EV_FORK_ENABLE	2032	#if EV_FORK_ENABLE
1792	array_free (fork, EMPTY);	2033	array_free (fork, EMPTY);
1793	#endif	2034	#endif
		2035	#if EV_CLEANUP_ENABLE
		2036	array_free (cleanup, EMPTY);
		2037	#endif
1794	array_free (prepare, EMPTY);	2038	array_free (prepare, EMPTY);
1795	array_free (check, EMPTY);	2039	array_free (check, EMPTY);
1796	#if EV_ASYNC_ENABLE	2040	#if EV_ASYNC_ENABLE
1797	array_free (async, EMPTY);	2041	array_free (async, EMPTY);
1798	#endif	2042	#endif
1799		2043
1800	backend = 0;	2044	backend = 0;
		2045
		2046	#if EV_MULTIPLICITY
		2047	if (ev_is_default_loop (EV_A))
		2048	#endif
		2049	ev_default_loop_ptr = 0;
		2050	#if EV_MULTIPLICITY
		2051	else
		2052	ev_free (EV_A);
		2053	#endif
1801	}	2054	}
1802		2055
1803	#if EV_USE_INOTIFY	2056	#if EV_USE_INOTIFY
1804	inline_size void infy_fork (EV_P);	2057	inline_size void infy_fork (EV_P);
1805	#endif	2058	#endif
…		…
1820	infy_fork (EV_A);	2073	infy_fork (EV_A);
1821	#endif	2074	#endif
1822		2075
1823	if (ev_is_active (&pipe_w))	2076	if (ev_is_active (&pipe_w))
1824	{	2077	{
1825	/* this "locks" the handlers against writing to the pipe */	2078	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1826	/* while we modify the fd vars */
1827	sig_pending = 1;
1828	#if EV_ASYNC_ENABLE
1829	async_pending = 1;
1830	#endif
1831		2079
1832	ev_ref (EV_A);	2080	ev_ref (EV_A);
1833	ev_io_stop (EV_A_ &pipe_w);	2081	ev_io_stop (EV_A_ &pipe_w);
1834		2082
1835	#if EV_USE_EVENTFD	2083	#if EV_USE_EVENTFD
…		…
1853	postfork = 0;	2101	postfork = 0;
1854	}	2102	}
1855		2103
1856	#if EV_MULTIPLICITY	2104	#if EV_MULTIPLICITY
1857		2105
1858	struct ev_loop *	2106	struct ev_loop * ecb_cold
1859	ev_loop_new (unsigned int flags)	2107	ev_loop_new (unsigned int flags)
1860	{	2108	{
1861	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2109	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1862		2110
1863	memset (EV_A, 0, sizeof (struct ev_loop));	2111	memset (EV_A, 0, sizeof (struct ev_loop));
1864	loop_init (EV_A_ flags);	2112	loop_init (EV_A_ flags);
1865		2113
1866	if (ev_backend (EV_A))	2114	if (ev_backend (EV_A))
1867	return EV_A;	2115	return EV_A;
1868		2116
		2117	ev_free (EV_A);
1869	return 0;	2118	return 0;
1870	}	2119	}
1871		2120
1872	void
1873	ev_loop_destroy (EV_P)
1874	{
1875	loop_destroy (EV_A);
1876	ev_free (loop);
1877	}
1878
1879	void
1880	ev_loop_fork (EV_P)
1881	{
1882	postfork = 1; /* must be in line with ev_default_fork */
1883	}
1884	#endif /* multiplicity */	2121	#endif /* multiplicity */
1885		2122
1886	#if EV_VERIFY	2123	#if EV_VERIFY
1887	static void noinline	2124	static void noinline ecb_cold
1888	verify_watcher (EV_P_ W w)	2125	verify_watcher (EV_P_ W w)
1889	{	2126	{
1890	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2127	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1891		2128
1892	if (w->pending)	2129	if (w->pending)
1893	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2130	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1894	}	2131	}
1895		2132
1896	static void noinline	2133	static void noinline ecb_cold
1897	verify_heap (EV_P_ ANHE *heap, int N)	2134	verify_heap (EV_P_ ANHE *heap, int N)
1898	{	2135	{
1899	int i;	2136	int i;
1900		2137
1901	for (i = HEAP0; i < N + HEAP0; ++i)	2138	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1906		2143
1907	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2144	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1908	}	2145	}
1909	}	2146	}
1910		2147
1911	static void noinline	2148	static void noinline ecb_cold
1912	array_verify (EV_P_ W *ws, int cnt)	2149	array_verify (EV_P_ W *ws, int cnt)
1913	{	2150	{
1914	while (cnt--)	2151	while (cnt--)
1915	{	2152	{
1916	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2153	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1918	}	2155	}
1919	}	2156	}
1920	#endif	2157	#endif
1921		2158
1922	#if EV_FEATURE_API	2159	#if EV_FEATURE_API
1923	void	2160	void ecb_cold
1924	ev_verify (EV_P)	2161	ev_verify (EV_P)
1925	{	2162	{
1926	#if EV_VERIFY	2163	#if EV_VERIFY
1927	int i;	2164	int i;
1928	WL w;	2165	WL w;
…		…
1963	#if EV_FORK_ENABLE	2200	#if EV_FORK_ENABLE
1964	assert (forkmax >= forkcnt);	2201	assert (forkmax >= forkcnt);
1965	array_verify (EV_A_ (W *)forks, forkcnt);	2202	array_verify (EV_A_ (W *)forks, forkcnt);
1966	#endif	2203	#endif
1967		2204
		2205	#if EV_CLEANUP_ENABLE
		2206	assert (cleanupmax >= cleanupcnt);
		2207	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2208	#endif
		2209
1968	#if EV_ASYNC_ENABLE	2210	#if EV_ASYNC_ENABLE
1969	assert (asyncmax >= asynccnt);	2211	assert (asyncmax >= asynccnt);
1970	array_verify (EV_A_ (W *)asyncs, asynccnt);	2212	array_verify (EV_A_ (W *)asyncs, asynccnt);
1971	#endif	2213	#endif
1972		2214
…		…
1989	#endif	2231	#endif
1990	}	2232	}
1991	#endif	2233	#endif
1992		2234
1993	#if EV_MULTIPLICITY	2235	#if EV_MULTIPLICITY
1994	struct ev_loop *	2236	struct ev_loop * ecb_cold
1995	ev_default_loop_init (unsigned int flags)
1996	#else	2237	#else
1997	int	2238	int
		2239	#endif
1998	ev_default_loop (unsigned int flags)	2240	ev_default_loop (unsigned int flags)
1999	#endif
2000	{	2241	{
2001	if (!ev_default_loop_ptr)	2242	if (!ev_default_loop_ptr)
2002	{	2243	{
2003	#if EV_MULTIPLICITY	2244	#if EV_MULTIPLICITY
2004	EV_P = ev_default_loop_ptr = &default_loop_struct;	2245	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
2023		2264
2024	return ev_default_loop_ptr;	2265	return ev_default_loop_ptr;
2025	}	2266	}
2026		2267
2027	void	2268	void
2028	ev_default_destroy (void)	2269	ev_loop_fork (EV_P)
2029	{	2270	{
2030	#if EV_MULTIPLICITY
2031	EV_P = ev_default_loop_ptr;
2032	#endif
2033
2034	ev_default_loop_ptr = 0;
2035
2036	#if EV_CHILD_ENABLE
2037	ev_ref (EV_A); /* child watcher */
2038	ev_signal_stop (EV_A_ &childev);
2039	#endif
2040
2041	loop_destroy (EV_A);
2042	}
2043
2044	void
2045	ev_default_fork (void)
2046	{
2047	#if EV_MULTIPLICITY
2048	EV_P = ev_default_loop_ptr;
2049	#endif
2050
2051	postfork = 1; /* must be in line with ev_loop_fork */	2271	postfork = 1; /* must be in line with ev_default_fork */
2052	}	2272	}
2053		2273
2054	/*****************************************************************************/	2274	/*****************************************************************************/
2055		2275
2056	void	2276	void
…		…
2078		2298
2079	for (pri = NUMPRI; pri--; )	2299	for (pri = NUMPRI; pri--; )
2080	while (pendingcnt [pri])	2300	while (pendingcnt [pri])
2081	{	2301	{
2082	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2302	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2083
2084	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2085	/* ^ this is no longer true, as pending_w could be here */
2086		2303
2087	p->w->pending = 0;	2304	p->w->pending = 0;
2088	EV_CB_INVOKE (p->w, p->events);	2305	EV_CB_INVOKE (p->w, p->events);
2089	EV_FREQUENT_CHECK;	2306	EV_FREQUENT_CHECK;
2090	}	2307	}
…		…
2152	feed_reverse_done (EV_A_ EV_TIMER);	2369	feed_reverse_done (EV_A_ EV_TIMER);
2153	}	2370	}
2154	}	2371	}
2155		2372
2156	#if EV_PERIODIC_ENABLE	2373	#if EV_PERIODIC_ENABLE
		2374
		2375	static void noinline
		2376	periodic_recalc (EV_P_ ev_periodic *w)
		2377	{
		2378	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2379	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2380
		2381	/* the above almost always errs on the low side */
		2382	while (at <= ev_rt_now)
		2383	{
		2384	ev_tstamp nat = at + w->interval;
		2385
		2386	/* when resolution fails us, we use ev_rt_now */
		2387	if (expect_false (nat == at))
		2388	{
		2389	at = ev_rt_now;
		2390	break;
		2391	}
		2392
		2393	at = nat;
		2394	}
		2395
		2396	ev_at (w) = at;
		2397	}
		2398
2157	/* make periodics pending */	2399	/* make periodics pending */
2158	inline_size void	2400	inline_size void
2159	periodics_reify (EV_P)	2401	periodics_reify (EV_P)
2160	{	2402	{
2161	EV_FREQUENT_CHECK;	2403	EV_FREQUENT_CHECK;
…		…
2180	ANHE_at_cache (periodics [HEAP0]);	2422	ANHE_at_cache (periodics [HEAP0]);
2181	downheap (periodics, periodiccnt, HEAP0);	2423	downheap (periodics, periodiccnt, HEAP0);
2182	}	2424	}
2183	else if (w->interval)	2425	else if (w->interval)
2184	{	2426	{
2185	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2427	periodic_recalc (EV_A_ w);
2186	/* if next trigger time is not sufficiently in the future, put it there */
2187	/* this might happen because of floating point inexactness */
2188	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2189	{
2190	ev_at (w) += w->interval;
2191
2192	/* if interval is unreasonably low we might still have a time in the past */
2193	/* so correct this. this will make the periodic very inexact, but the user */
2194	/* has effectively asked to get triggered more often than possible */
2195	if (ev_at (w) < ev_rt_now)
2196	ev_at (w) = ev_rt_now;
2197	}
2198
2199	ANHE_at_cache (periodics [HEAP0]);	2428	ANHE_at_cache (periodics [HEAP0]);
2200	downheap (periodics, periodiccnt, HEAP0);	2429	downheap (periodics, periodiccnt, HEAP0);
2201	}	2430	}
2202	else	2431	else
2203	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2432	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2211	}	2440	}
2212	}	2441	}
2213		2442
2214	/* simply recalculate all periodics */	2443	/* simply recalculate all periodics */
2215	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2444	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2216	static void noinline	2445	static void noinline ecb_cold
2217	periodics_reschedule (EV_P)	2446	periodics_reschedule (EV_P)
2218	{	2447	{
2219	int i;	2448	int i;
2220		2449
2221	/* adjust periodics after time jump */	2450	/* adjust periodics after time jump */
…		…
2224	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2453	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2225		2454
2226	if (w->reschedule_cb)	2455	if (w->reschedule_cb)
2227	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2456	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2228	else if (w->interval)	2457	else if (w->interval)
2229	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2458	periodic_recalc (EV_A_ w);
2230		2459
2231	ANHE_at_cache (periodics [i]);	2460	ANHE_at_cache (periodics [i]);
2232	}	2461	}
2233		2462
2234	reheap (periodics, periodiccnt);	2463	reheap (periodics, periodiccnt);
2235	}	2464	}
2236	#endif	2465	#endif
2237		2466
2238	/* adjust all timers by a given offset */	2467	/* adjust all timers by a given offset */
2239	static void noinline	2468	static void noinline ecb_cold
2240	timers_reschedule (EV_P_ ev_tstamp adjust)	2469	timers_reschedule (EV_P_ ev_tstamp adjust)
2241	{	2470	{
2242	int i;	2471	int i;
2243		2472
2244	for (i = 0; i < timercnt; ++i)	2473	for (i = 0; i < timercnt; ++i)
…		…
2281	* doesn't hurt either as we only do this on time-jumps or	2510	* doesn't hurt either as we only do this on time-jumps or
2282	* in the unlikely event of having been preempted here.	2511	* in the unlikely event of having been preempted here.
2283	*/	2512	*/
2284	for (i = 4; --i; )	2513	for (i = 4; --i; )
2285	{	2514	{
		2515	ev_tstamp diff;
2286	rtmn_diff = ev_rt_now - mn_now;	2516	rtmn_diff = ev_rt_now - mn_now;
2287		2517
		2518	diff = odiff - rtmn_diff;
		2519
2288	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2520	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2289	return; /* all is well */	2521	return; /* all is well */
2290		2522
2291	ev_rt_now = ev_time ();	2523	ev_rt_now = ev_time ();
2292	mn_now = get_clock ();	2524	mn_now = get_clock ();
2293	now_floor = mn_now;	2525	now_floor = mn_now;
…		…
2383	ev_tstamp prev_mn_now = mn_now;	2615	ev_tstamp prev_mn_now = mn_now;
2384		2616
2385	/* update time to cancel out callback processing overhead */	2617	/* update time to cancel out callback processing overhead */
2386	time_update (EV_A_ 1e100);	2618	time_update (EV_A_ 1e100);
2387		2619
		2620	/* from now on, we want a pipe-wake-up */
		2621	pipe_write_wanted = 1;
		2622
		2623	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		2624
2388	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2625	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2389	{	2626	{
2390	waittime = MAX_BLOCKTIME;	2627	waittime = MAX_BLOCKTIME;
2391		2628
2392	if (timercnt)	2629	if (timercnt)
2393	{	2630	{
2394	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2631	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2395	if (waittime > to) waittime = to;	2632	if (waittime > to) waittime = to;
2396	}	2633	}
2397		2634
2398	#if EV_PERIODIC_ENABLE	2635	#if EV_PERIODIC_ENABLE
2399	if (periodiccnt)	2636	if (periodiccnt)
2400	{	2637	{
2401	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2638	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2402	if (waittime > to) waittime = to;	2639	if (waittime > to) waittime = to;
2403	}	2640	}
2404	#endif	2641	#endif
2405		2642
2406	/* don't let timeouts decrease the waittime below timeout_blocktime */	2643	/* don't let timeouts decrease the waittime below timeout_blocktime */
2407	if (expect_false (waittime < timeout_blocktime))	2644	if (expect_false (waittime < timeout_blocktime))
2408	waittime = timeout_blocktime;	2645	waittime = timeout_blocktime;
		2646
		2647	/* at this point, we NEED to wait, so we have to ensure */
		2648	/* to pass a minimum nonzero value to the backend */
		2649	if (expect_false (waittime < backend_mintime))
		2650	waittime = backend_mintime;
2409		2651
2410	/* extra check because io_blocktime is commonly 0 */	2652	/* extra check because io_blocktime is commonly 0 */
2411	if (expect_false (io_blocktime))	2653	if (expect_false (io_blocktime))
2412	{	2654	{
2413	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2655	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2414		2656
2415	if (sleeptime > waittime - backend_fudge)	2657	if (sleeptime > waittime - backend_mintime)
2416	sleeptime = waittime - backend_fudge;	2658	sleeptime = waittime - backend_mintime;
2417		2659
2418	if (expect_true (sleeptime > 0.))	2660	if (expect_true (sleeptime > 0.))
2419	{	2661	{
2420	ev_sleep (sleeptime);	2662	ev_sleep (sleeptime);
2421	waittime -= sleeptime;	2663	waittime -= sleeptime;
…		…
2427	++loop_count;	2669	++loop_count;
2428	#endif	2670	#endif
2429	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2671	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2430	backend_poll (EV_A_ waittime);	2672	backend_poll (EV_A_ waittime);
2431	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2673	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2674
		2675	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2676
		2677	if (pipe_write_skipped)
		2678	{
		2679	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2680	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2681	}
		2682
2432		2683
2433	/* update ev_rt_now, do magic */	2684	/* update ev_rt_now, do magic */
2434	time_update (EV_A_ waittime + sleeptime);	2685	time_update (EV_A_ waittime + sleeptime);
2435	}	2686	}
2436		2687
…		…
2726	if (w->reschedule_cb)	2977	if (w->reschedule_cb)
2727	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2978	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2728	else if (w->interval)	2979	else if (w->interval)
2729	{	2980	{
2730	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2981	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2731	/* this formula differs from the one in periodic_reify because we do not always round up */	2982	periodic_recalc (EV_A_ w);
2732	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2733	}	2983	}
2734	else	2984	else
2735	ev_at (w) = w->offset;	2985	ev_at (w) = w->offset;
2736		2986
2737	EV_FREQUENT_CHECK;	2987	EV_FREQUENT_CHECK;
…		…
2858	sa.sa_handler = ev_sighandler;	3108	sa.sa_handler = ev_sighandler;
2859	sigfillset (&sa.sa_mask);	3109	sigfillset (&sa.sa_mask);
2860	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3110	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2861	sigaction (w->signum, &sa, 0);	3111	sigaction (w->signum, &sa, 0);
2862		3112
		3113	if (origflags & EVFLAG_NOSIGMASK)
		3114	{
2863	sigemptyset (&sa.sa_mask);	3115	sigemptyset (&sa.sa_mask);
2864	sigaddset (&sa.sa_mask, w->signum);	3116	sigaddset (&sa.sa_mask, w->signum);
2865	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3117	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3118	}
2866	#endif	3119	#endif
2867	}	3120	}
2868		3121
2869	EV_FREQUENT_CHECK;	3122	EV_FREQUENT_CHECK;
2870	}	3123	}
…		…
3011	if (!pend \|\| pend == path)	3264	if (!pend \|\| pend == path)
3012	break;	3265	break;
3013		3266
3014	*pend = 0;	3267	*pend = 0;
3015	w->wd = inotify_add_watch (fs_fd, path, mask);	3268	w->wd = inotify_add_watch (fs_fd, path, mask);
3016	}	3269	}
3017	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3270	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3018	}	3271	}
3019	}	3272	}
3020		3273
3021	if (w->wd >= 0)	3274	if (w->wd >= 0)
…		…
3088	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3341	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3089	ofs += sizeof (struct inotify_event) + ev->len;	3342	ofs += sizeof (struct inotify_event) + ev->len;
3090	}	3343	}
3091	}	3344	}
3092		3345
3093	inline_size void	3346	inline_size void ecb_cold
3094	ev_check_2625 (EV_P)	3347	ev_check_2625 (EV_P)
3095	{	3348	{
3096	/* kernels < 2.6.25 are borked	3349	/* kernels < 2.6.25 are borked
3097	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3350	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3098	*/	3351	*/
…		…
3562		3815
3563	EV_FREQUENT_CHECK;	3816	EV_FREQUENT_CHECK;
3564	}	3817	}
3565	#endif	3818	#endif
3566		3819
		3820	#if EV_CLEANUP_ENABLE
		3821	void
		3822	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3823	{
		3824	if (expect_false (ev_is_active (w)))
		3825	return;
		3826
		3827	EV_FREQUENT_CHECK;
		3828
		3829	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3830	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3831	cleanups [cleanupcnt - 1] = w;
		3832
		3833	/* cleanup watchers should never keep a refcount on the loop */
		3834	ev_unref (EV_A);
		3835	EV_FREQUENT_CHECK;
		3836	}
		3837
		3838	void
		3839	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3840	{
		3841	clear_pending (EV_A_ (W)w);
		3842	if (expect_false (!ev_is_active (w)))
		3843	return;
		3844
		3845	EV_FREQUENT_CHECK;
		3846	ev_ref (EV_A);
		3847
		3848	{
		3849	int active = ev_active (w);
		3850
		3851	cleanups [active - 1] = cleanups [--cleanupcnt];
		3852	ev_active (cleanups [active - 1]) = active;
		3853	}
		3854
		3855	ev_stop (EV_A_ (W)w);
		3856
		3857	EV_FREQUENT_CHECK;
		3858	}
		3859	#endif
		3860
3567	#if EV_ASYNC_ENABLE	3861	#if EV_ASYNC_ENABLE
3568	void	3862	void
3569	ev_async_start (EV_P_ ev_async *w)	3863	ev_async_start (EV_P_ ev_async *w)
3570	{	3864	{
3571	if (expect_false (ev_is_active (w)))	3865	if (expect_false (ev_is_active (w)))
…		…
3682	}	3976	}
3683		3977
3684	/*****************************************************************************/	3978	/*****************************************************************************/
3685		3979
3686	#if EV_WALK_ENABLE	3980	#if EV_WALK_ENABLE
3687	void	3981	void ecb_cold
3688	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3982	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3689	{	3983	{
3690	int i, j;	3984	int i, j;
3691	ev_watcher_list wl, wn;	3985	ev_watcher_list wl, wn;
3692		3986

Diff Legend

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

Comparing libev/ev.c (file contents): Revision 1.355 by root, Fri Oct 22 10:09:12 2010 UTC vs. Revision 1.389 by root, Wed Aug 3 15:31:23 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.355 by root, Fri Oct 22 10:09:12 2010 UTC vs.
Revision 1.389 by root, Wed Aug 3 15:31:23 2011 UTC