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Comparing libev/ev.c (file contents):
Revision 1.344 by root, Fri Jul 9 20:55:14 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,
…		…
35	* and other provisions required by the GPL. If you do not delete the	35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under	36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.	37	* either the BSD or the GPL.
38	*/	38	*/
39		39
40	#ifdef __cplusplus
41	extern "C" {
42	#endif
43
44	/* this big block deduces configuration from config.h */	40	/* this big block deduces configuration from config.h */
45	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
46	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
47	# include EV_CONFIG_H	43	# include EV_CONFIG_H
48	# else	44	# else
49	# include "config.h"	45	# include "config.h"
50	# endif	46	# endif
		47
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
51		53
52	# if HAVE_CLOCK_SYSCALL	54	# if HAVE_CLOCK_SYSCALL
53	# ifndef EV_USE_CLOCK_SYSCALL	55	# ifndef EV_USE_CLOCK_SYSCALL
54	# define EV_USE_CLOCK_SYSCALL 1	56	# define EV_USE_CLOCK_SYSCALL 1
55	# ifndef EV_USE_REALTIME	57	# ifndef EV_USE_REALTIME
…		…
160	# define EV_USE_EVENTFD 0	162	# define EV_USE_EVENTFD 0
161	# endif	163	# endif
162		164
163	#endif	165	#endif
164		166
165	#include <math.h>
166	#include <stdlib.h>	167	#include <stdlib.h>
167	#include <string.h>	168	#include <string.h>
168	#include <fcntl.h>	169	#include <fcntl.h>
169	#include <stddef.h>	170	#include <stddef.h>
170		171
…		…
181	#ifdef EV_H	182	#ifdef EV_H
182	# include EV_H	183	# include EV_H
183	#else	184	#else
184	# include "ev.h"	185	# include "ev.h"
185	#endif	186	#endif
		187
		188	EV_CPP(extern "C" {)
186		189
187	#ifndef _WIN32	190	#ifndef _WIN32
188	# include <sys/time.h>	191	# include <sys/time.h>
189	# include <sys/wait.h>	192	# include <sys/wait.h>
190	# include <unistd.h>	193	# include <unistd.h>
…		…
234	/* to make it compile regardless, just remove the above line, */	237	/* to make it compile regardless, just remove the above line, */
235	/* but consider reporting it, too! :) */	238	/* but consider reporting it, too! :) */
236	# define EV_NSIG 65	239	# define EV_NSIG 65
237	#endif	240	#endif
238		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
239	#ifndef EV_USE_CLOCK_SYSCALL	246	#ifndef EV_USE_CLOCK_SYSCALL
240	# if __linux && __GLIBC__ >= 2	247	# if __linux && __GLIBC__ >= 2
241	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS	248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
242	# else	249	# else
243	# define EV_USE_CLOCK_SYSCALL 0	250	# define EV_USE_CLOCK_SYSCALL 0
…		…
378	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
379	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
380	#endif	387	#endif
381		388
382	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
383	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
384	# include <sys/select.h>	392	# include <sys/select.h>
385	# endif	393	# endif
386	#endif	394	#endif
387		395
388	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
389	# include <sys/utsname.h>
390	# include <sys/statfs.h>	397	# include <sys/statfs.h>
391	# include <sys/inotify.h>	398	# include <sys/inotify.h>
392	/* 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 */
393	# ifndef IN_DONT_FOLLOW	400	# ifndef IN_DONT_FOLLOW
394	# undef EV_USE_INOTIFY	401	# undef EV_USE_INOTIFY
…		…
411	# define EFD_CLOEXEC O_CLOEXEC	418	# define EFD_CLOEXEC O_CLOEXEC
412	# else	419	# else
413	# define EFD_CLOEXEC 02000000	420	# define EFD_CLOEXEC 02000000
414	# endif	421	# endif
415	# endif	422	# endif
416	# ifdef __cplusplus
417	extern "C" {
418	# endif
419	int (eventfd) (unsigned int initval, int flags);	423	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
420	# ifdef __cplusplus
421	}
422	# endif
423	#endif	424	#endif
424		425
425	#if EV_USE_SIGNALFD	426	#if EV_USE_SIGNALFD
426	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	427	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427	# include <stdint.h>	428	# include <stdint.h>
…		…
433	# define SFD_CLOEXEC O_CLOEXEC	434	# define SFD_CLOEXEC O_CLOEXEC
434	# else	435	# else
435	# define SFD_CLOEXEC 02000000	436	# define SFD_CLOEXEC 02000000
436	# endif	437	# endif
437	# endif	438	# endif
438	# ifdef __cplusplus
439	extern "C" {
440	# endif
441	int signalfd (int fd, const sigset_t *mask, int flags);	439	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
442		440
443	struct signalfd_siginfo	441	struct signalfd_siginfo
444	{	442	{
445	uint32_t ssi_signo;	443	uint32_t ssi_signo;
446	char pad[128 - sizeof (uint32_t)];	444	char pad[128 - sizeof (uint32_t)];
447	};	445	};
448	# ifdef __cplusplus
449	}
450	# endif	446	#endif
451	#endif
452
453		447
454	/**/	448	/**/
455		449
456	#if EV_VERIFY >= 3	450	#if EV_VERIFY >= 3
457	# define EV_FREQUENT_CHECK ev_verify (EV_A)	451	# define EV_FREQUENT_CHECK ev_verify (EV_A)
458	#else	452	#else
459	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
460	#endif	454	#endif
461		455
462	/*	456	/*
463	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
464	* It is added to ev_rt_now when scheduling periodics
465	* to ensure progress, time-wise, even when rounding
466	* errors are against us.
467	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
468	* Better solutions welcome.
469	*/	459	*/
470	#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 */
471		462
472	#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) */
473	#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) */
474		465
475	#if __GNUC__ >= 4	466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476	# define expect(expr,value) __builtin_expect ((expr),(value))	467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
477	# define noinline __attribute__ ((noinline))	468
		469	/* the following are taken from libecb */
		470	/* ecb.h start */
		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
478	#else	493	#else
479	# define expect(expr,value) (expr)	494	#define ecb_inline static
480	# define noinline
481	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
482	# define inline
483	# 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
484	#endif	508	#endif
		509	#endif
485		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. */
486	#define expect_false(expr) expect ((expr) != 0, 0)	567	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
487	#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
488	#define inline_size static inline	575	#define inline_size ecb_inline
489		576
490	#if EV_FEATURE_CODE	577	#if EV_FEATURE_CODE
491	# define inline_speed static inline	578	# define inline_speed ecb_inline
492	#else	579	#else
493	# define inline_speed static noinline	580	# define inline_speed static noinline
494	#endif	581	#endif
495		582
496	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	583	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
511	#define ev_active(w) ((W)(w))->active	598	#define ev_active(w) ((W)(w))->active
512	#define ev_at(w) ((WT)(w))->at	599	#define ev_at(w) ((WT)(w))->at
513		600
514	#if EV_USE_REALTIME	601	#if EV_USE_REALTIME
515	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	602	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
516	/* giving it a reasonably high chance of working on typical architetcures */	603	/* giving it a reasonably high chance of working on typical architectures */
517	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */	604	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
518	#endif	605	#endif
519		606
520	#if EV_USE_MONOTONIC	607	#if EV_USE_MONOTONIC
521	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	608	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
…		…
535	# include "ev_win32.c"	622	# include "ev_win32.c"
536	#endif	623	#endif
537		624
538	/*****************************************************************************/	625	/*****************************************************************************/
539		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
		675	#ifdef __linux
		676	# include <sys/utsname.h>
		677	#endif
		678
		679	static unsigned int noinline ecb_cold
		680	ev_linux_version (void)
		681	{
		682	#ifdef __linux
		683	unsigned int v = 0;
		684	struct utsname buf;
		685	int i;
		686	char *p = buf.release;
		687
		688	if (uname (&buf))
		689	return 0;
		690
		691	for (i = 3+1; --i; )
		692	{
		693	unsigned int c = 0;
		694
		695	for (;;)
		696	{
		697	if (*p >= '0' && *p <= '9')
		698	c = c * 10 + *p++ - '0';
		699	else
		700	{
		701	p += *p == '.';
		702	break;
		703	}
		704	}
		705
		706	v = (v << 8) | c;
		707	}
		708
		709	return v;
		710	#else
		711	return 0;
		712	#endif
		713	}
		714
		715	/*****************************************************************************/
		716
540	#if EV_AVOID_STDIO	717	#if EV_AVOID_STDIO
541	static void noinline	718	static void noinline ecb_cold
542	ev_printerr (const char *msg)	719	ev_printerr (const char *msg)
543	{	720	{
544	write (STDERR_FILENO, msg, strlen (msg));	721	write (STDERR_FILENO, msg, strlen (msg));
545	}	722	}
546	#endif	723	#endif
547		724
548	static void (*syserr_cb)(const char *msg);	725	static void (*syserr_cb)(const char *msg);
549		726
550	void	727	void ecb_cold
551	ev_set_syserr_cb (void (*cb)(const char *msg))	728	ev_set_syserr_cb (void (*cb)(const char *msg))
552	{	729	{
553	syserr_cb = cb;	730	syserr_cb = cb;
554	}	731	}
555		732
556	static void noinline	733	static void noinline ecb_cold
557	ev_syserr (const char *msg)	734	ev_syserr (const char *msg)
558	{	735	{
559	if (!msg)	736	if (!msg)
560	msg = "(libev) system error";	737	msg = "(libev) system error";
561		738
562	if (syserr_cb)	739	if (syserr_cb)
563	syserr_cb (msg);	740	syserr_cb (msg);
564	else	741	else
565	{	742	{
566	#if EV_AVOID_STDIO	743	#if EV_AVOID_STDIO
567	const char *err = strerror (errno);
568
569	ev_printerr (msg);	744	ev_printerr (msg);
570	ev_printerr (": ");	745	ev_printerr (": ");
571	ev_printerr (err);	746	ev_printerr (strerror (errno));
572	ev_printerr ("\n");	747	ev_printerr ("\n");
573	#else	748	#else
574	perror (msg);	749	perror (msg);
575	#endif	750	#endif
576	abort ();	751	abort ();
…		…
596	#endif	771	#endif
597	}	772	}
598		773
599	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	774	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
600		775
601	void	776	void ecb_cold
602	ev_set_allocator (void *(*cb)(void *ptr, long size))	777	ev_set_allocator (void *(*cb)(void *ptr, long size))
603	{	778	{
604	alloc = cb;	779	alloc = cb;
605	}	780	}
606		781
…		…
610	ptr = alloc (ptr, size);	785	ptr = alloc (ptr, size);
611		786
612	if (!ptr && size)	787	if (!ptr && size)
613	{	788	{
614	#if EV_AVOID_STDIO	789	#if EV_AVOID_STDIO
615	ev_printerr ("libev: memory allocation failed, aborting.\n");	790	ev_printerr ("(libev) memory allocation failed, aborting.\n");
616	#else	791	#else
617	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	792	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
618	#endif	793	#endif
619	abort ();	794	abort ();
620	}	795	}
621		796
622	return ptr;	797	return ptr;
…		…
639	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	814	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
640	unsigned char unused;	815	unsigned char unused;
641	#if EV_USE_EPOLL	816	#if EV_USE_EPOLL
642	unsigned int egen; /* generation counter to counter epoll bugs */	817	unsigned int egen; /* generation counter to counter epoll bugs */
643	#endif	818	#endif
644	#if EV_SELECT_IS_WINSOCKET	819	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
645	SOCKET handle;	820	SOCKET handle;
		821	#endif
		822	#if EV_USE_IOCP
		823	OVERLAPPED or, ow;
646	#endif	824	#endif
647	} ANFD;	825	} ANFD;
648		826
649	/* stores the pending event set for a given watcher */	827	/* stores the pending event set for a given watcher */
650	typedef struct	828	typedef struct
…		…
715	# define EV_RELEASE_CB (void)0	893	# define EV_RELEASE_CB (void)0
716	# define EV_ACQUIRE_CB (void)0	894	# define EV_ACQUIRE_CB (void)0
717	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	895	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
718	#endif	896	#endif
719		897
720	#define EVUNLOOP_RECURSE 0x80	898	#define EVBREAK_RECURSE 0x80
721		899
722	/*****************************************************************************/	900	/*****************************************************************************/
723		901
724	#ifndef EV_HAVE_EV_TIME	902	#ifndef EV_HAVE_EV_TIME
725	ev_tstamp	903	ev_tstamp
…		…
769	if (delay > 0.)	947	if (delay > 0.)
770	{	948	{
771	#if EV_USE_NANOSLEEP	949	#if EV_USE_NANOSLEEP
772	struct timespec ts;	950	struct timespec ts;
773		951
774	ts.tv_sec = (time_t)delay;	952	EV_TS_SET (ts, delay);
775	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
776
777	nanosleep (&ts, 0);	953	nanosleep (&ts, 0);
778	#elif defined(_WIN32)	954	#elif defined(_WIN32)
779	Sleep ((unsigned long)(delay * 1e3));	955	Sleep ((unsigned long)(delay * 1e3));
780	#else	956	#else
781	struct timeval tv;	957	struct timeval tv;
782		958
783	tv.tv_sec = (time_t)delay;
784	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
785
786	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	959	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
787	/* something not guaranteed by newer posix versions, but guaranteed */	960	/* something not guaranteed by newer posix versions, but guaranteed */
788	/* by older ones */	961	/* by older ones */
		962	EV_TV_SET (tv, delay);
789	select (0, 0, 0, 0, &tv);	963	select (0, 0, 0, 0, &tv);
790	#endif	964	#endif
791	}	965	}
792	}	966	}
793		967
794	/*****************************************************************************/	968	/*****************************************************************************/
795		969
796	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	970	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
797		971
798	/* find a suitable new size for the given array, */	972	/* find a suitable new size for the given array, */
799	/* hopefully by rounding to a ncie-to-malloc size */	973	/* hopefully by rounding to a nice-to-malloc size */
800	inline_size int	974	inline_size int
801	array_nextsize (int elem, int cur, int cnt)	975	array_nextsize (int elem, int cur, int cnt)
802	{	976	{
803	int ncur = cur + 1;	977	int ncur = cur + 1;
804		978
…		…
816	}	990	}
817		991
818	return ncur;	992	return ncur;
819	}	993	}
820		994
821	static noinline void *	995	static void * noinline ecb_cold
822	array_realloc (int elem, void *base, int *cur, int cnt)	996	array_realloc (int elem, void *base, int *cur, int cnt)
823	{	997	{
824	*cur = array_nextsize (elem, *cur, cnt);	998	*cur = array_nextsize (elem, *cur, cnt);
825	return ev_realloc (base, elem * *cur);	999	return ev_realloc (base, elem * *cur);
826	}	1000	}
…		…
829	memset ((void *)(base), 0, sizeof (*(base)) * (count))	1003	memset ((void *)(base), 0, sizeof (*(base)) * (count))
830		1004
831	#define array_needsize(type,base,cur,cnt,init) \	1005	#define array_needsize(type,base,cur,cnt,init) \
832	if (expect_false ((cnt) > (cur))) \	1006	if (expect_false ((cnt) > (cur))) \
833	{ \	1007	{ \
834	int ocur_ = (cur); \	1008	int ecb_unused ocur_ = (cur); \
835	(base) = (type *)array_realloc \	1009	(base) = (type *)array_realloc \
836	(sizeof (type), (base), &(cur), (cnt)); \	1010	(sizeof (type), (base), &(cur), (cnt)); \
837	init ((base) + (ocur_), (cur) - ocur_); \	1011	init ((base) + (ocur_), (cur) - ocur_); \
838	}	1012	}
839		1013
…		…
939	inline_size void	1113	inline_size void
940	fd_reify (EV_P)	1114	fd_reify (EV_P)
941	{	1115	{
942	int i;	1116	int i;
943		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
944	for (i = 0; i < fdchangecnt; ++i)	1143	for (i = 0; i < fdchangecnt; ++i)
945	{	1144	{
946	int fd = fdchanges [i];	1145	int fd = fdchanges [i];
947	ANFD *anfd = anfds + fd;	1146	ANFD *anfd = anfds + fd;
948	ev_io *w;	1147	ev_io *w;
949		1148
950	unsigned char events = 0;	1149	unsigned char o_events = anfd->events;
		1150	unsigned char o_reify = anfd->reify;
951		1151
952	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1152	anfd->reify = 0;
953	events |= (unsigned char)w->events;
954		1153
955	#if EV_SELECT_IS_WINSOCKET	1154	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
956	if (events)
957	{	1155	{
958	unsigned long arg;	1156	anfd->events = 0;
959	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1157
960	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1158	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		1159	anfd->events |= (unsigned char)w->events;
		1160
		1161	if (o_events != anfd->events)
		1162	o_reify = EV__IOFDSET; /* actually |= */
961	}	1163	}
962	#endif
963		1164
964	{	1165	if (o_reify & EV__IOFDSET)
965	unsigned char o_events = anfd->events;
966	unsigned char o_reify = anfd->reify;
967
968	anfd->reify = 0;
969	anfd->events = events;
970
971	if (o_events != events || o_reify & EV__IOFDSET)
972	backend_modify (EV_A_ fd, o_events, events);	1166	backend_modify (EV_A_ fd, o_events, anfd->events);
973	}
974	}	1167	}
975		1168
976	fdchangecnt = 0;	1169	fdchangecnt = 0;
977	}	1170	}
978		1171
…		…
990	fdchanges [fdchangecnt - 1] = fd;	1183	fdchanges [fdchangecnt - 1] = fd;
991	}	1184	}
992	}	1185	}
993		1186
994	/* 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 */
995	inline_speed void	1188	inline_speed void ecb_cold
996	fd_kill (EV_P_ int fd)	1189	fd_kill (EV_P_ int fd)
997	{	1190	{
998	ev_io *w;	1191	ev_io *w;
999		1192
1000	while ((w = (ev_io *)anfds [fd].head))	1193	while ((w = (ev_io *)anfds [fd].head))
…		…
1003	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);
1004	}	1197	}
1005	}	1198	}
1006		1199
1007	/* check whether the given fd is actually valid, for error recovery */	1200	/* check whether the given fd is actually valid, for error recovery */
1008	inline_size int	1201	inline_size int ecb_cold
1009	fd_valid (int fd)	1202	fd_valid (int fd)
1010	{	1203	{
1011	#ifdef _WIN32	1204	#ifdef _WIN32
1012	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1205	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1013	#else	1206	#else
1014	return fcntl (fd, F_GETFD) != -1;	1207	return fcntl (fd, F_GETFD) != -1;
1015	#endif	1208	#endif
1016	}	1209	}
1017		1210
1018	/* called on EBADF to verify fds */	1211	/* called on EBADF to verify fds */
1019	static void noinline	1212	static void noinline ecb_cold
1020	fd_ebadf (EV_P)	1213	fd_ebadf (EV_P)
1021	{	1214	{
1022	int fd;	1215	int fd;
1023		1216
1024	for (fd = 0; fd < anfdmax; ++fd)	1217	for (fd = 0; fd < anfdmax; ++fd)
…		…
1026	if (!fd_valid (fd) && errno == EBADF)	1219	if (!fd_valid (fd) && errno == EBADF)
1027	fd_kill (EV_A_ fd);	1220	fd_kill (EV_A_ fd);
1028	}	1221	}
1029		1222
1030	/* 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 */
1031	static void noinline	1224	static void noinline ecb_cold
1032	fd_enomem (EV_P)	1225	fd_enomem (EV_P)
1033	{	1226	{
1034	int fd;	1227	int fd;
1035		1228
1036	for (fd = anfdmax; fd--; )	1229	for (fd = anfdmax; fd--; )
…		…
1071	}	1264	}
1072		1265
1073	/*****************************************************************************/	1266	/*****************************************************************************/
1074		1267
1075	/*	1268	/*
1076	* the heap functions want a real array index. array index 0 uis guaranteed to not	1269	* the heap functions want a real array index. array index 0 is guaranteed to not
1077	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives	1270	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1078	* the branching factor of the d-tree.	1271	* the branching factor of the d-tree.
1079	*/	1272	*/
1080		1273
1081	/*	1274	/*
…		…
1231		1424
1232	/*****************************************************************************/	1425	/*****************************************************************************/
1233		1426
1234	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE	1427	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1235		1428
1236	static void noinline	1429	static void noinline ecb_cold
1237	evpipe_init (EV_P)	1430	evpipe_init (EV_P)
1238	{	1431	{
1239	if (!ev_is_active (&pipe_w))	1432	if (!ev_is_active (&pipe_w))
1240	{	1433	{
1241	# if EV_USE_EVENTFD	1434	# if EV_USE_EVENTFD
…		…
1263	ev_io_start (EV_A_ &pipe_w);	1456	ev_io_start (EV_A_ &pipe_w);
1264	ev_unref (EV_A); /* watcher should not keep loop alive */	1457	ev_unref (EV_A); /* watcher should not keep loop alive */
1265	}	1458	}
1266	}	1459	}
1267		1460
1268	inline_size void	1461	inline_speed void
1269	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1462	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1270	{	1463	{
1271	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)
1272	{	1476	{
		1477	int old_errno;
		1478
		1479	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1480
1273	int old_errno = errno; /* save errno because write might clobber it */	1481	old_errno = errno; /* save errno because write will clobber it */
1274	char dummy;
1275
1276	*flag = 1;
1277		1482
1278	#if EV_USE_EVENTFD	1483	#if EV_USE_EVENTFD
1279	if (evfd >= 0)	1484	if (evfd >= 0)
1280	{	1485	{
1281	uint64_t counter = 1;	1486	uint64_t counter = 1;
1282	write (evfd, &counter, sizeof (uint64_t));	1487	write (evfd, &counter, sizeof (uint64_t));
1283	}	1488	}
1284	else	1489	else
1285	#endif	1490	#endif
		1491	{
		1492	/* win32 people keep sending patches that change this write() to send() */
		1493	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1494	/* so when you think this write should be a send instead, please find out */
		1495	/* where your send() is from - it's definitely not the microsoft send, and */
		1496	/* tell me. thank you. */
1286	write (evpipe [1], &dummy, 1);	1497	write (evpipe [1], &(evpipe [1]), 1);
		1498	}
1287		1499
1288	errno = old_errno;	1500	errno = old_errno;
1289	}	1501	}
1290	}	1502	}
1291		1503
…		…
1294	static void	1506	static void
1295	pipecb (EV_P_ ev_io *iow, int revents)	1507	pipecb (EV_P_ ev_io *iow, int revents)
1296	{	1508	{
1297	int i;	1509	int i;
1298		1510
		1511	if (revents & EV_READ)
		1512	{
1299	#if EV_USE_EVENTFD	1513	#if EV_USE_EVENTFD
1300	if (evfd >= 0)	1514	if (evfd >= 0)
1301	{	1515	{
1302	uint64_t counter;	1516	uint64_t counter;
1303	read (evfd, &counter, sizeof (uint64_t));	1517	read (evfd, &counter, sizeof (uint64_t));
1304	}	1518	}
1305	else	1519	else
1306	#endif	1520	#endif
1307	{	1521	{
1308	char dummy;	1522	char dummy;
		1523	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1309	read (evpipe [0], &dummy, 1);	1524	read (evpipe [0], &dummy, 1);
		1525	}
1310	}	1526	}
1311		1527
		1528	pipe_write_skipped = 0;
		1529
		1530	#if EV_SIGNAL_ENABLE
1312	if (sig_pending)	1531	if (sig_pending)
1313	{	1532	{
1314	sig_pending = 0;	1533	sig_pending = 0;
1315		1534
1316	for (i = EV_NSIG - 1; i--; )	1535	for (i = EV_NSIG - 1; i--; )
1317	if (expect_false (signals [i].pending))	1536	if (expect_false (signals [i].pending))
1318	ev_feed_signal_event (EV_A_ i + 1);	1537	ev_feed_signal_event (EV_A_ i + 1);
1319	}	1538	}
		1539	#endif
1320		1540
1321	#if EV_ASYNC_ENABLE	1541	#if EV_ASYNC_ENABLE
1322	if (async_pending)	1542	if (async_pending)
1323	{	1543	{
1324	async_pending = 0;	1544	async_pending = 0;
…		…
1333	#endif	1553	#endif
1334	}	1554	}
1335		1555
1336	/*****************************************************************************/	1556	/*****************************************************************************/
1337		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
1338	static void	1575	static void
1339	ev_sighandler (int signum)	1576	ev_sighandler (int signum)
1340	{	1577	{
1341	#if EV_MULTIPLICITY
1342	EV_P = signals [signum - 1].loop;
1343	#endif
1344
1345	#ifdef _WIN32	1578	#ifdef _WIN32
1346	signal (signum, ev_sighandler);	1579	signal (signum, ev_sighandler);
1347	#endif	1580	#endif
1348		1581
1349	signals [signum - 1].pending = 1;	1582	ev_feed_signal (signum);
1350	evpipe_write (EV_A_ &sig_pending);
1351	}	1583	}
1352		1584
1353	void noinline	1585	void noinline
1354	ev_feed_signal_event (EV_P_ int signum)	1586	ev_feed_signal_event (EV_P_ int signum)
1355	{	1587	{
…		…
1455		1687
1456	#endif	1688	#endif
1457		1689
1458	/*****************************************************************************/	1690	/*****************************************************************************/
1459		1691
		1692	#if EV_USE_IOCP
		1693	# include "ev_iocp.c"
		1694	#endif
1460	#if EV_USE_PORT	1695	#if EV_USE_PORT
1461	# include "ev_port.c"	1696	# include "ev_port.c"
1462	#endif	1697	#endif
1463	#if EV_USE_KQUEUE	1698	#if EV_USE_KQUEUE
1464	# include "ev_kqueue.c"	1699	# include "ev_kqueue.c"
…		…
1471	#endif	1706	#endif
1472	#if EV_USE_SELECT	1707	#if EV_USE_SELECT
1473	# include "ev_select.c"	1708	# include "ev_select.c"
1474	#endif	1709	#endif
1475		1710
1476	int	1711	int ecb_cold
1477	ev_version_major (void)	1712	ev_version_major (void)
1478	{	1713	{
1479	return EV_VERSION_MAJOR;	1714	return EV_VERSION_MAJOR;
1480	}	1715	}
1481		1716
1482	int	1717	int ecb_cold
1483	ev_version_minor (void)	1718	ev_version_minor (void)
1484	{	1719	{
1485	return EV_VERSION_MINOR;	1720	return EV_VERSION_MINOR;
1486	}	1721	}
1487		1722
1488	/* 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 */
1489	int inline_size	1724	int inline_size ecb_cold
1490	enable_secure (void)	1725	enable_secure (void)
1491	{	1726	{
1492	#ifdef _WIN32	1727	#ifdef _WIN32
1493	return 0;	1728	return 0;
1494	#else	1729	#else
1495	return getuid () != geteuid ()	1730	return getuid () != geteuid ()
1496	|| getgid () != getegid ();	1731	|| getgid () != getegid ();
1497	#endif	1732	#endif
1498	}	1733	}
1499		1734
1500	unsigned int	1735	unsigned int ecb_cold
1501	ev_supported_backends (void)	1736	ev_supported_backends (void)
1502	{	1737	{
1503	unsigned int flags = 0;	1738	unsigned int flags = 0;
1504		1739
1505	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	1740	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
…		…
1509	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;	1744	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1510		1745
1511	return flags;	1746	return flags;
1512	}	1747	}
1513		1748
1514	unsigned int	1749	unsigned int ecb_cold
1515	ev_recommended_backends (void)	1750	ev_recommended_backends (void)
1516	{	1751	{
1517	unsigned int flags = ev_supported_backends ();	1752	unsigned int flags = ev_supported_backends ();
1518		1753
1519	#ifndef __NetBSD__	1754	#ifndef __NetBSD__
…		…
1531	#endif	1766	#endif
1532		1767
1533	return flags;	1768	return flags;
1534	}	1769	}
1535		1770
1536	unsigned int	1771	unsigned int ecb_cold
1537	ev_embeddable_backends (void)	1772	ev_embeddable_backends (void)
1538	{	1773	{
1539	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	1774	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1540		1775
1541	/* 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 */
1542	/* please fix it and tell me how to detect the fix */	1777	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1543	flags &= ~EVBACKEND_EPOLL;	1778	flags &= ~EVBACKEND_EPOLL;
1544		1779
1545	return flags;	1780	return flags;
1546	}	1781	}
1547		1782
1548	unsigned int	1783	unsigned int
…		…
1586	ev_userdata (EV_P)	1821	ev_userdata (EV_P)
1587	{	1822	{
1588	return userdata;	1823	return userdata;
1589	}	1824	}
1590		1825
		1826	void
1591	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))
1592	{	1828	{
1593	invoke_cb = invoke_pending_cb;	1829	invoke_cb = invoke_pending_cb;
1594	}	1830	}
1595		1831
		1832	void
1596	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))
1597	{	1834	{
1598	release_cb = release;	1835	release_cb = release;
1599	acquire_cb = acquire;	1836	acquire_cb = acquire;
1600	}	1837	}
1601	#endif	1838	#endif
1602		1839
1603	/* initialise a loop structure, must be zero-initialised */	1840	/* initialise a loop structure, must be zero-initialised */
1604	static void noinline	1841	static void noinline ecb_cold
1605	loop_init (EV_P_ unsigned int flags)	1842	loop_init (EV_P_ unsigned int flags)
1606	{	1843	{
1607	if (!backend)	1844	if (!backend)
1608	{	1845	{
		1846	origflags = flags;
		1847
1609	#if EV_USE_REALTIME	1848	#if EV_USE_REALTIME
1610	if (!have_realtime)	1849	if (!have_realtime)
1611	{	1850	{
1612	struct timespec ts;	1851	struct timespec ts;
1613		1852
…		…
1635	if (!(flags & EVFLAG_NOENV)	1874	if (!(flags & EVFLAG_NOENV)
1636	&& !enable_secure ()	1875	&& !enable_secure ()
1637	&& getenv ("LIBEV_FLAGS"))	1876	&& getenv ("LIBEV_FLAGS"))
1638	flags = atoi (getenv ("LIBEV_FLAGS"));	1877	flags = atoi (getenv ("LIBEV_FLAGS"));
1639		1878
1640	ev_rt_now = ev_time ();	1879	ev_rt_now = ev_time ();
1641	mn_now = get_clock ();	1880	mn_now = get_clock ();
1642	now_floor = mn_now;	1881	now_floor = mn_now;
1643	rtmn_diff = ev_rt_now - mn_now;	1882	rtmn_diff = ev_rt_now - mn_now;
1644	#if EV_FEATURE_API	1883	#if EV_FEATURE_API
1645	invoke_cb = ev_invoke_pending;	1884	invoke_cb = ev_invoke_pending;
1646	#endif	1885	#endif
1647		1886
1648	io_blocktime = 0.;	1887	io_blocktime = 0.;
1649	timeout_blocktime = 0.;	1888	timeout_blocktime = 0.;
1650	backend = 0;	1889	backend = 0;
1651	backend_fd = -1;	1890	backend_fd = -1;
1652	sig_pending = 0;	1891	sig_pending = 0;
1653	#if EV_ASYNC_ENABLE	1892	#if EV_ASYNC_ENABLE
1654	async_pending = 0;	1893	async_pending = 0;
1655	#endif	1894	#endif
		1895	pipe_write_skipped = 0;
		1896	pipe_write_wanted = 0;
1656	#if EV_USE_INOTIFY	1897	#if EV_USE_INOTIFY
1657	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1898	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1658	#endif	1899	#endif
1659	#if EV_USE_SIGNALFD	1900	#if EV_USE_SIGNALFD
1660	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1901	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1661	#endif	1902	#endif
1662		1903
1663	if (!(flags & 0x0000ffffU))	1904	if (!(flags & EVBACKEND_MASK))
1664	flags |= ev_recommended_backends ();	1905	flags |= ev_recommended_backends ();
1665		1906
		1907	#if EV_USE_IOCP
		1908	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1909	#endif
1666	#if EV_USE_PORT	1910	#if EV_USE_PORT
1667	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1911	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1668	#endif	1912	#endif
1669	#if EV_USE_KQUEUE	1913	#if EV_USE_KQUEUE
1670	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1914	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1687	#endif	1931	#endif
1688	}	1932	}
1689	}	1933	}
1690		1934
1691	/* free up a loop structure */	1935	/* free up a loop structure */
1692	static void noinline	1936	void ecb_cold
1693	loop_destroy (EV_P)	1937	ev_loop_destroy (EV_P)
1694	{	1938	{
1695	int i;	1939	int i;
		1940
		1941	#if EV_MULTIPLICITY
		1942	/* mimic free (0) */
		1943	if (!EV_A)
		1944	return;
		1945	#endif
		1946
		1947	#if EV_CLEANUP_ENABLE
		1948	/* queue cleanup watchers (and execute them) */
		1949	if (expect_false (cleanupcnt))
		1950	{
		1951	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1952	EV_INVOKE_PENDING;
		1953	}
		1954	#endif
		1955
		1956	#if EV_CHILD_ENABLE
		1957	if (ev_is_active (&childev))
		1958	{
		1959	ev_ref (EV_A); /* child watcher */
		1960	ev_signal_stop (EV_A_ &childev);
		1961	}
		1962	#endif
1696		1963
1697	if (ev_is_active (&pipe_w))	1964	if (ev_is_active (&pipe_w))
1698	{	1965	{
1699	/*ev_ref (EV_A);*/	1966	/*ev_ref (EV_A);*/
1700	/*ev_io_stop (EV_A_ &pipe_w);*/	1967	/*ev_io_stop (EV_A_ &pipe_w);*/
…		…
1722	#endif	1989	#endif
1723		1990
1724	if (backend_fd >= 0)	1991	if (backend_fd >= 0)
1725	close (backend_fd);	1992	close (backend_fd);
1726		1993
		1994	#if EV_USE_IOCP
		1995	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1996	#endif
1727	#if EV_USE_PORT	1997	#if EV_USE_PORT
1728	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1998	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1729	#endif	1999	#endif
1730	#if EV_USE_KQUEUE	2000	#if EV_USE_KQUEUE
1731	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	2001	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1758	array_free (periodic, EMPTY);	2028	array_free (periodic, EMPTY);
1759	#endif	2029	#endif
1760	#if EV_FORK_ENABLE	2030	#if EV_FORK_ENABLE
1761	array_free (fork, EMPTY);	2031	array_free (fork, EMPTY);
1762	#endif	2032	#endif
		2033	#if EV_CLEANUP_ENABLE
		2034	array_free (cleanup, EMPTY);
		2035	#endif
1763	array_free (prepare, EMPTY);	2036	array_free (prepare, EMPTY);
1764	array_free (check, EMPTY);	2037	array_free (check, EMPTY);
1765	#if EV_ASYNC_ENABLE	2038	#if EV_ASYNC_ENABLE
1766	array_free (async, EMPTY);	2039	array_free (async, EMPTY);
1767	#endif	2040	#endif
1768		2041
1769	backend = 0;	2042	backend = 0;
		2043
		2044	#if EV_MULTIPLICITY
		2045	if (ev_is_default_loop (EV_A))
		2046	#endif
		2047	ev_default_loop_ptr = 0;
		2048	#if EV_MULTIPLICITY
		2049	else
		2050	ev_free (EV_A);
		2051	#endif
1770	}	2052	}
1771		2053
1772	#if EV_USE_INOTIFY	2054	#if EV_USE_INOTIFY
1773	inline_size void infy_fork (EV_P);	2055	inline_size void infy_fork (EV_P);
1774	#endif	2056	#endif
…		…
1789	infy_fork (EV_A);	2071	infy_fork (EV_A);
1790	#endif	2072	#endif
1791		2073
1792	if (ev_is_active (&pipe_w))	2074	if (ev_is_active (&pipe_w))
1793	{	2075	{
1794	/* this "locks" the handlers against writing to the pipe */	2076	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1795	/* while we modify the fd vars */
1796	sig_pending = 1;
1797	#if EV_ASYNC_ENABLE
1798	async_pending = 1;
1799	#endif
1800		2077
1801	ev_ref (EV_A);	2078	ev_ref (EV_A);
1802	ev_io_stop (EV_A_ &pipe_w);	2079	ev_io_stop (EV_A_ &pipe_w);
1803		2080
1804	#if EV_USE_EVENTFD	2081	#if EV_USE_EVENTFD
…		…
1822	postfork = 0;	2099	postfork = 0;
1823	}	2100	}
1824		2101
1825	#if EV_MULTIPLICITY	2102	#if EV_MULTIPLICITY
1826		2103
1827	struct ev_loop *	2104	struct ev_loop * ecb_cold
1828	ev_loop_new (unsigned int flags)	2105	ev_loop_new (unsigned int flags)
1829	{	2106	{
1830	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2107	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1831		2108
1832	memset (EV_A, 0, sizeof (struct ev_loop));	2109	memset (EV_A, 0, sizeof (struct ev_loop));
1833	loop_init (EV_A_ flags);	2110	loop_init (EV_A_ flags);
1834		2111
1835	if (ev_backend (EV_A))	2112	if (ev_backend (EV_A))
1836	return EV_A;	2113	return EV_A;
1837		2114
		2115	ev_free (EV_A);
1838	return 0;	2116	return 0;
1839	}	2117	}
1840		2118
1841	void
1842	ev_loop_destroy (EV_P)
1843	{
1844	loop_destroy (EV_A);
1845	ev_free (loop);
1846	}
1847
1848	void
1849	ev_loop_fork (EV_P)
1850	{
1851	postfork = 1; /* must be in line with ev_default_fork */
1852	}
1853	#endif /* multiplicity */	2119	#endif /* multiplicity */
1854		2120
1855	#if EV_VERIFY	2121	#if EV_VERIFY
1856	static void noinline	2122	static void noinline ecb_cold
1857	verify_watcher (EV_P_ W w)	2123	verify_watcher (EV_P_ W w)
1858	{	2124	{
1859	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));
1860		2126
1861	if (w->pending)	2127	if (w->pending)
1862	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));
1863	}	2129	}
1864		2130
1865	static void noinline	2131	static void noinline ecb_cold
1866	verify_heap (EV_P_ ANHE *heap, int N)	2132	verify_heap (EV_P_ ANHE *heap, int N)
1867	{	2133	{
1868	int i;	2134	int i;
1869		2135
1870	for (i = HEAP0; i < N + HEAP0; ++i)	2136	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1875		2141
1876	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2142	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1877	}	2143	}
1878	}	2144	}
1879		2145
1880	static void noinline	2146	static void noinline ecb_cold
1881	array_verify (EV_P_ W *ws, int cnt)	2147	array_verify (EV_P_ W *ws, int cnt)
1882	{	2148	{
1883	while (cnt--)	2149	while (cnt--)
1884	{	2150	{
1885	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2151	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1887	}	2153	}
1888	}	2154	}
1889	#endif	2155	#endif
1890		2156
1891	#if EV_FEATURE_API	2157	#if EV_FEATURE_API
1892	void	2158	void ecb_cold
1893	ev_verify (EV_P)	2159	ev_verify (EV_P)
1894	{	2160	{
1895	#if EV_VERIFY	2161	#if EV_VERIFY
1896	int i;	2162	int i;
1897	WL w;	2163	WL w;
…		…
1932	#if EV_FORK_ENABLE	2198	#if EV_FORK_ENABLE
1933	assert (forkmax >= forkcnt);	2199	assert (forkmax >= forkcnt);
1934	array_verify (EV_A_ (W *)forks, forkcnt);	2200	array_verify (EV_A_ (W *)forks, forkcnt);
1935	#endif	2201	#endif
1936		2202
		2203	#if EV_CLEANUP_ENABLE
		2204	assert (cleanupmax >= cleanupcnt);
		2205	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2206	#endif
		2207
1937	#if EV_ASYNC_ENABLE	2208	#if EV_ASYNC_ENABLE
1938	assert (asyncmax >= asynccnt);	2209	assert (asyncmax >= asynccnt);
1939	array_verify (EV_A_ (W *)asyncs, asynccnt);	2210	array_verify (EV_A_ (W *)asyncs, asynccnt);
1940	#endif	2211	#endif
1941		2212
…		…
1958	#endif	2229	#endif
1959	}	2230	}
1960	#endif	2231	#endif
1961		2232
1962	#if EV_MULTIPLICITY	2233	#if EV_MULTIPLICITY
1963	struct ev_loop *	2234	struct ev_loop * ecb_cold
1964	ev_default_loop_init (unsigned int flags)
1965	#else	2235	#else
1966	int	2236	int
		2237	#endif
1967	ev_default_loop (unsigned int flags)	2238	ev_default_loop (unsigned int flags)
1968	#endif
1969	{	2239	{
1970	if (!ev_default_loop_ptr)	2240	if (!ev_default_loop_ptr)
1971	{	2241	{
1972	#if EV_MULTIPLICITY	2242	#if EV_MULTIPLICITY
1973	EV_P = ev_default_loop_ptr = &default_loop_struct;	2243	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1992		2262
1993	return ev_default_loop_ptr;	2263	return ev_default_loop_ptr;
1994	}	2264	}
1995		2265
1996	void	2266	void
1997	ev_default_destroy (void)	2267	ev_loop_fork (EV_P)
1998	{	2268	{
1999	#if EV_MULTIPLICITY
2000	EV_P = ev_default_loop_ptr;
2001	#endif
2002
2003	ev_default_loop_ptr = 0;
2004
2005	#if EV_CHILD_ENABLE
2006	ev_ref (EV_A); /* child watcher */
2007	ev_signal_stop (EV_A_ &childev);
2008	#endif
2009
2010	loop_destroy (EV_A);
2011	}
2012
2013	void
2014	ev_default_fork (void)
2015	{
2016	#if EV_MULTIPLICITY
2017	EV_P = ev_default_loop_ptr;
2018	#endif
2019
2020	postfork = 1; /* must be in line with ev_loop_fork */	2269	postfork = 1; /* must be in line with ev_default_fork */
2021	}	2270	}
2022		2271
2023	/*****************************************************************************/	2272	/*****************************************************************************/
2024		2273
2025	void	2274	void
…		…
2047		2296
2048	for (pri = NUMPRI; pri--; )	2297	for (pri = NUMPRI; pri--; )
2049	while (pendingcnt [pri])	2298	while (pendingcnt [pri])
2050	{	2299	{
2051	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2300	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2052
2053	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2054	/* ^ this is no longer true, as pending_w could be here */
2055		2301
2056	p->w->pending = 0;	2302	p->w->pending = 0;
2057	EV_CB_INVOKE (p->w, p->events);	2303	EV_CB_INVOKE (p->w, p->events);
2058	EV_FREQUENT_CHECK;	2304	EV_FREQUENT_CHECK;
2059	}	2305	}
…		…
2121	feed_reverse_done (EV_A_ EV_TIMER);	2367	feed_reverse_done (EV_A_ EV_TIMER);
2122	}	2368	}
2123	}	2369	}
2124		2370
2125	#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
2126	/* make periodics pending */	2397	/* make periodics pending */
2127	inline_size void	2398	inline_size void
2128	periodics_reify (EV_P)	2399	periodics_reify (EV_P)
2129	{	2400	{
2130	EV_FREQUENT_CHECK;	2401	EV_FREQUENT_CHECK;
…		…
2149	ANHE_at_cache (periodics [HEAP0]);	2420	ANHE_at_cache (periodics [HEAP0]);
2150	downheap (periodics, periodiccnt, HEAP0);	2421	downheap (periodics, periodiccnt, HEAP0);
2151	}	2422	}
2152	else if (w->interval)	2423	else if (w->interval)
2153	{	2424	{
2154	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2425	periodic_recalc (EV_A_ w);
2155	/* if next trigger time is not sufficiently in the future, put it there */
2156	/* this might happen because of floating point inexactness */
2157	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2158	{
2159	ev_at (w) += w->interval;
2160
2161	/* if interval is unreasonably low we might still have a time in the past */
2162	/* so correct this. this will make the periodic very inexact, but the user */
2163	/* has effectively asked to get triggered more often than possible */
2164	if (ev_at (w) < ev_rt_now)
2165	ev_at (w) = ev_rt_now;
2166	}
2167
2168	ANHE_at_cache (periodics [HEAP0]);	2426	ANHE_at_cache (periodics [HEAP0]);
2169	downheap (periodics, periodiccnt, HEAP0);	2427	downheap (periodics, periodiccnt, HEAP0);
2170	}	2428	}
2171	else	2429	else
2172	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2430	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2179	feed_reverse_done (EV_A_ EV_PERIODIC);	2437	feed_reverse_done (EV_A_ EV_PERIODIC);
2180	}	2438	}
2181	}	2439	}
2182		2440
2183	/* simply recalculate all periodics */	2441	/* simply recalculate all periodics */
2184	/* TODO: maybe ensure that at leats one event happens when jumping forward? */	2442	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2185	static void noinline	2443	static void noinline ecb_cold
2186	periodics_reschedule (EV_P)	2444	periodics_reschedule (EV_P)
2187	{	2445	{
2188	int i;	2446	int i;
2189		2447
2190	/* adjust periodics after time jump */	2448	/* adjust periodics after time jump */
…		…
2193	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);	2451	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2194		2452
2195	if (w->reschedule_cb)	2453	if (w->reschedule_cb)
2196	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2454	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2197	else if (w->interval)	2455	else if (w->interval)
2198	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2456	periodic_recalc (EV_A_ w);
2199		2457
2200	ANHE_at_cache (periodics [i]);	2458	ANHE_at_cache (periodics [i]);
2201	}	2459	}
2202		2460
2203	reheap (periodics, periodiccnt);	2461	reheap (periodics, periodiccnt);
2204	}	2462	}
2205	#endif	2463	#endif
2206		2464
2207	/* adjust all timers by a given offset */	2465	/* adjust all timers by a given offset */
2208	static void noinline	2466	static void noinline ecb_cold
2209	timers_reschedule (EV_P_ ev_tstamp adjust)	2467	timers_reschedule (EV_P_ ev_tstamp adjust)
2210	{	2468	{
2211	int i;	2469	int i;
2212		2470
2213	for (i = 0; i < timercnt; ++i)	2471	for (i = 0; i < timercnt; ++i)
…		…
2250	* 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
2251	* in the unlikely event of having been preempted here.	2509	* in the unlikely event of having been preempted here.
2252	*/	2510	*/
2253	for (i = 4; --i; )	2511	for (i = 4; --i; )
2254	{	2512	{
		2513	ev_tstamp diff;
2255	rtmn_diff = ev_rt_now - mn_now;	2514	rtmn_diff = ev_rt_now - mn_now;
2256		2515
		2516	diff = odiff - rtmn_diff;
		2517
2257	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2518	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2258	return; /* all is well */	2519	return; /* all is well */
2259		2520
2260	ev_rt_now = ev_time ();	2521	ev_rt_now = ev_time ();
2261	mn_now = get_clock ();	2522	mn_now = get_clock ();
2262	now_floor = mn_now;	2523	now_floor = mn_now;
…		…
2285	mn_now = ev_rt_now;	2546	mn_now = ev_rt_now;
2286	}	2547	}
2287	}	2548	}
2288		2549
2289	void	2550	void
2290	ev_loop (EV_P_ int flags)	2551	ev_run (EV_P_ int flags)
2291	{	2552	{
2292	#if EV_FEATURE_API	2553	#if EV_FEATURE_API
2293	++loop_depth;	2554	++loop_depth;
2294	#endif	2555	#endif
2295		2556
2296	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2557	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2297		2558
2298	loop_done = EVUNLOOP_CANCEL;	2559	loop_done = EVBREAK_CANCEL;
2299		2560
2300	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2561	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2301		2562
2302	do	2563	do
2303	{	2564	{
…		…
2346	/* calculate blocking time */	2607	/* calculate blocking time */
2347	{	2608	{
2348	ev_tstamp waittime = 0.;	2609	ev_tstamp waittime = 0.;
2349	ev_tstamp sleeptime = 0.;	2610	ev_tstamp sleeptime = 0.;
2350		2611
		2612	/* remember old timestamp for io_blocktime calculation */
		2613	ev_tstamp prev_mn_now = mn_now;
		2614
		2615	/* update time to cancel out callback processing overhead */
		2616	time_update (EV_A_ 1e100);
		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
2351	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2623	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2352	{	2624	{
2353	/* remember old timestamp for io_blocktime calculation */
2354	ev_tstamp prev_mn_now = mn_now;
2355
2356	/* update time to cancel out callback processing overhead */
2357	time_update (EV_A_ 1e100);
2358
2359	waittime = MAX_BLOCKTIME;	2625	waittime = MAX_BLOCKTIME;
2360		2626
2361	if (timercnt)	2627	if (timercnt)
2362	{	2628	{
2363	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2629	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2364	if (waittime > to) waittime = to;	2630	if (waittime > to) waittime = to;
2365	}	2631	}
2366		2632
2367	#if EV_PERIODIC_ENABLE	2633	#if EV_PERIODIC_ENABLE
2368	if (periodiccnt)	2634	if (periodiccnt)
2369	{	2635	{
2370	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2636	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2371	if (waittime > to) waittime = to;	2637	if (waittime > to) waittime = to;
2372	}	2638	}
2373	#endif	2639	#endif
2374		2640
2375	/* don't let timeouts decrease the waittime below timeout_blocktime */	2641	/* don't let timeouts decrease the waittime below timeout_blocktime */
2376	if (expect_false (waittime < timeout_blocktime))	2642	if (expect_false (waittime < timeout_blocktime))
2377	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;
2378		2649
2379	/* extra check because io_blocktime is commonly 0 */	2650	/* extra check because io_blocktime is commonly 0 */
2380	if (expect_false (io_blocktime))	2651	if (expect_false (io_blocktime))
2381	{	2652	{
2382	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2653	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2383		2654
2384	if (sleeptime > waittime - backend_fudge)	2655	if (sleeptime > waittime - backend_mintime)
2385	sleeptime = waittime - backend_fudge;	2656	sleeptime = waittime - backend_mintime;
2386		2657
2387	if (expect_true (sleeptime > 0.))	2658	if (expect_true (sleeptime > 0.))
2388	{	2659	{
2389	ev_sleep (sleeptime);	2660	ev_sleep (sleeptime);
2390	waittime -= sleeptime;	2661	waittime -= sleeptime;
…		…
2393	}	2664	}
2394		2665
2395	#if EV_FEATURE_API	2666	#if EV_FEATURE_API
2396	++loop_count;	2667	++loop_count;
2397	#endif	2668	#endif
2398	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2669	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2399	backend_poll (EV_A_ waittime);	2670	backend_poll (EV_A_ waittime);
2400	assert ((loop_done = EVUNLOOP_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
2401		2681
2402	/* update ev_rt_now, do magic */	2682	/* update ev_rt_now, do magic */
2403	time_update (EV_A_ waittime + sleeptime);	2683	time_update (EV_A_ waittime + sleeptime);
2404	}	2684	}
2405		2685
…		…
2423	EV_INVOKE_PENDING;	2703	EV_INVOKE_PENDING;
2424	}	2704	}
2425	while (expect_true (	2705	while (expect_true (
2426	activecnt	2706	activecnt
2427	&& !loop_done	2707	&& !loop_done
2428	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2708	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2429	));	2709	));
2430		2710
2431	if (loop_done == EVUNLOOP_ONE)	2711	if (loop_done == EVBREAK_ONE)
2432	loop_done = EVUNLOOP_CANCEL;	2712	loop_done = EVBREAK_CANCEL;
2433		2713
2434	#if EV_FEATURE_API	2714	#if EV_FEATURE_API
2435	--loop_depth;	2715	--loop_depth;
2436	#endif	2716	#endif
2437	}	2717	}
2438		2718
2439	void	2719	void
2440	ev_unloop (EV_P_ int how)	2720	ev_break (EV_P_ int how)
2441	{	2721	{
2442	loop_done = how;	2722	loop_done = how;
2443	}	2723	}
2444		2724
2445	void	2725	void
…		…
2593	EV_FREQUENT_CHECK;	2873	EV_FREQUENT_CHECK;
2594		2874
2595	wlist_del (&anfds[w->fd].head, (WL)w);	2875	wlist_del (&anfds[w->fd].head, (WL)w);
2596	ev_stop (EV_A_ (W)w);	2876	ev_stop (EV_A_ (W)w);
2597		2877
2598	fd_change (EV_A_ w->fd, 1);	2878	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2599		2879
2600	EV_FREQUENT_CHECK;	2880	EV_FREQUENT_CHECK;
2601	}	2881	}
2602		2882
2603	void noinline	2883	void noinline
…		…
2695	if (w->reschedule_cb)	2975	if (w->reschedule_cb)
2696	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2976	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2697	else if (w->interval)	2977	else if (w->interval)
2698	{	2978	{
2699	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.));
2700	/* this formula differs from the one in periodic_reify because we do not always round up */	2980	periodic_recalc (EV_A_ w);
2701	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2702	}	2981	}
2703	else	2982	else
2704	ev_at (w) = w->offset;	2983	ev_at (w) = w->offset;
2705		2984
2706	EV_FREQUENT_CHECK;	2985	EV_FREQUENT_CHECK;
…		…
2827	sa.sa_handler = ev_sighandler;	3106	sa.sa_handler = ev_sighandler;
2828	sigfillset (&sa.sa_mask);	3107	sigfillset (&sa.sa_mask);
2829	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 */
2830	sigaction (w->signum, &sa, 0);	3109	sigaction (w->signum, &sa, 0);
2831		3110
		3111	if (origflags & EVFLAG_NOSIGMASK)
		3112	{
2832	sigemptyset (&sa.sa_mask);	3113	sigemptyset (&sa.sa_mask);
2833	sigaddset (&sa.sa_mask, w->signum);	3114	sigaddset (&sa.sa_mask, w->signum);
2834	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3115	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3116	}
2835	#endif	3117	#endif
2836	}	3118	}
2837		3119
2838	EV_FREQUENT_CHECK;	3120	EV_FREQUENT_CHECK;
2839	}	3121	}
…		…
2980	if (!pend || pend == path)	3262	if (!pend || pend == path)
2981	break;	3263	break;
2982		3264
2983	*pend = 0;	3265	*pend = 0;
2984	w->wd = inotify_add_watch (fs_fd, path, mask);	3266	w->wd = inotify_add_watch (fs_fd, path, mask);
2985	}	3267	}
2986	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3268	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2987	}	3269	}
2988	}	3270	}
2989		3271
2990	if (w->wd >= 0)	3272	if (w->wd >= 0)
…		…
3057	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3339	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3058	ofs += sizeof (struct inotify_event) + ev->len;	3340	ofs += sizeof (struct inotify_event) + ev->len;
3059	}	3341	}
3060	}	3342	}
3061		3343
3062	inline_size unsigned int
3063	ev_linux_version (void)
3064	{
3065	struct utsname buf;
3066	unsigned int v;
3067	int i;
3068	char *p = buf.release;
3069
3070	if (uname (&buf))
3071	return 0;
3072
3073	for (i = 3+1; --i; )
3074	{
3075	unsigned int c = 0;
3076
3077	for (;;)
3078	{
3079	if (*p >= '0' && *p <= '9')
3080	c = c * 10 + *p++ - '0';
3081	else
3082	{
3083	p += *p == '.';
3084	break;
3085	}
3086	}
3087
3088	v = (v << 8) | c;
3089	}
3090
3091	return v;
3092	}
3093
3094	inline_size void	3344	inline_size void ecb_cold
3095	ev_check_2625 (EV_P)	3345	ev_check_2625 (EV_P)
3096	{	3346	{
3097	/* kernels < 2.6.25 are borked	3347	/* kernels < 2.6.25 are borked
3098	* 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
3099	*/	3349	*/
…		…
3420		3670
3421	#if EV_EMBED_ENABLE	3671	#if EV_EMBED_ENABLE
3422	void noinline	3672	void noinline
3423	ev_embed_sweep (EV_P_ ev_embed *w)	3673	ev_embed_sweep (EV_P_ ev_embed *w)
3424	{	3674	{
3425	ev_loop (w->other, EVLOOP_NONBLOCK);	3675	ev_run (w->other, EVRUN_NOWAIT);
3426	}	3676	}
3427		3677
3428	static void	3678	static void
3429	embed_io_cb (EV_P_ ev_io *io, int revents)	3679	embed_io_cb (EV_P_ ev_io *io, int revents)
3430	{	3680	{
3431	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3681	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3432		3682
3433	if (ev_cb (w))	3683	if (ev_cb (w))
3434	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3684	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3435	else	3685	else
3436	ev_loop (w->other, EVLOOP_NONBLOCK);	3686	ev_run (w->other, EVRUN_NOWAIT);
3437	}	3687	}
3438		3688
3439	static void	3689	static void
3440	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3690	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3441	{	3691	{
…		…
3445	EV_P = w->other;	3695	EV_P = w->other;
3446		3696
3447	while (fdchangecnt)	3697	while (fdchangecnt)
3448	{	3698	{
3449	fd_reify (EV_A);	3699	fd_reify (EV_A);
3450	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3700	ev_run (EV_A_ EVRUN_NOWAIT);
3451	}	3701	}
3452	}	3702	}
3453	}	3703	}
3454		3704
3455	static void	3705	static void
…		…
3461		3711
3462	{	3712	{
3463	EV_P = w->other;	3713	EV_P = w->other;
3464		3714
3465	ev_loop_fork (EV_A);	3715	ev_loop_fork (EV_A);
3466	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3716	ev_run (EV_A_ EVRUN_NOWAIT);
3467	}	3717	}
3468		3718
3469	ev_embed_start (EV_A_ w);	3719	ev_embed_start (EV_A_ w);
3470	}	3720	}
3471		3721
…		…
3563		3813
3564	EV_FREQUENT_CHECK;	3814	EV_FREQUENT_CHECK;
3565	}	3815	}
3566	#endif	3816	#endif
3567		3817
		3818	#if EV_CLEANUP_ENABLE
		3819	void
		3820	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3821	{
		3822	if (expect_false (ev_is_active (w)))
		3823	return;
		3824
		3825	EV_FREQUENT_CHECK;
		3826
		3827	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3828	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3829	cleanups [cleanupcnt - 1] = w;
		3830
		3831	/* cleanup watchers should never keep a refcount on the loop */
		3832	ev_unref (EV_A);
		3833	EV_FREQUENT_CHECK;
		3834	}
		3835
		3836	void
		3837	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3838	{
		3839	clear_pending (EV_A_ (W)w);
		3840	if (expect_false (!ev_is_active (w)))
		3841	return;
		3842
		3843	EV_FREQUENT_CHECK;
		3844	ev_ref (EV_A);
		3845
		3846	{
		3847	int active = ev_active (w);
		3848
		3849	cleanups [active - 1] = cleanups [--cleanupcnt];
		3850	ev_active (cleanups [active - 1]) = active;
		3851	}
		3852
		3853	ev_stop (EV_A_ (W)w);
		3854
		3855	EV_FREQUENT_CHECK;
		3856	}
		3857	#endif
		3858
3568	#if EV_ASYNC_ENABLE	3859	#if EV_ASYNC_ENABLE
3569	void	3860	void
3570	ev_async_start (EV_P_ ev_async *w)	3861	ev_async_start (EV_P_ ev_async *w)
3571	{	3862	{
3572	if (expect_false (ev_is_active (w)))	3863	if (expect_false (ev_is_active (w)))
3573	return;	3864	return;
		3865
		3866	w->sent = 0;
3574		3867
3575	evpipe_init (EV_A);	3868	evpipe_init (EV_A);
3576		3869
3577	EV_FREQUENT_CHECK;	3870	EV_FREQUENT_CHECK;
3578		3871
…		…
3681	}	3974	}
3682		3975
3683	/*****************************************************************************/	3976	/*****************************************************************************/
3684		3977
3685	#if EV_WALK_ENABLE	3978	#if EV_WALK_ENABLE
3686	void	3979	void ecb_cold
3687	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))
3688	{	3981	{
3689	int i, j;	3982	int i, j;
3690	ev_watcher_list *wl, *wn;	3983	ev_watcher_list *wl, *wn;
3691		3984
…		…
3798		4091
3799	#if EV_MULTIPLICITY	4092	#if EV_MULTIPLICITY
3800	#include "ev_wrap.h"	4093	#include "ev_wrap.h"
3801	#endif	4094	#endif
3802		4095
3803	#ifdef __cplusplus	4096	EV_CPP(})
3804	}
3805	#endif
3806		4097

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