ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.344 by root, Fri Jul 9 20:55:14 2010 UTC vs.
Revision 1.386 by root, Wed Jul 20 01:04:20 2011 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
10	* 1. Redistributions of source code must retain the above copyright notice,	10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.	11	* this list of conditions and the following disclaimer.
12	*	12	*
13	* 2. Redistributions in binary form must reproduce the above copyright	13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the	14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.	15	* documentation and/or other materials provided with the distribution.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO	19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-	20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,	21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
…		…
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
		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 defined(_WIN32) && defined(MemoryBarrier)
		517	#define ECB_MEMORY_FENCE MemoryBarrier ()
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#endif
		521	#endif
		522
		523	#ifndef ECB_MEMORY_FENCE
		524	#include <pthread.h>
		525
		526	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		527	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		528	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		529	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		530	#endif
		531
		532	#if ECB_GCC_VERSION(3,1)
		533	#define ecb_attribute(attrlist) __attribute__(attrlist)
		534	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		535	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		536	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		537	#else
		538	#define ecb_attribute(attrlist)
		539	#define ecb_is_constant(expr) 0
		540	#define ecb_expect(expr,value) (expr)
		541	#define ecb_prefetch(addr,rw,locality)
		542	#endif
		543
		544	#define ecb_noinline ecb_attribute ((__noinline__))
		545	#define ecb_noreturn ecb_attribute ((__noreturn__))
		546	#define ecb_unused ecb_attribute ((__unused__))
		547	#define ecb_const ecb_attribute ((__const__))
		548	#define ecb_pure ecb_attribute ((__pure__))
		549
		550	#if ECB_GCC_VERSION(4,3)
		551	#define ecb_artificial ecb_attribute ((__artificial__))
		552	#define ecb_hot ecb_attribute ((__hot__))
		553	#define ecb_cold ecb_attribute ((__cold__))
		554	#else
		555	#define ecb_artificial
		556	#define ecb_hot
		557	#define ecb_cold
		558	#endif
		559
		560	/* put around conditional expressions if you are very sure that the */
		561	/* expression is mostly true or mostly false. note that these return */
		562	/* booleans, not the expression. */
486	#define expect_false(expr) expect ((expr) != 0, 0)	563	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
487	#define expect_true(expr) expect ((expr) != 0, 1)	564	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		565	/* ecb.h end */
		566
		567	#define expect_false(cond) ecb_expect_false (cond)
		568	#define expect_true(cond) ecb_expect_true (cond)
		569	#define noinline ecb_noinline
		570
488	#define inline_size static inline	571	#define inline_size ecb_inline
489		572
490	#if EV_FEATURE_CODE	573	#if EV_FEATURE_CODE
491	# define inline_speed static inline	574	# define inline_speed ecb_inline
492	#else	575	#else
493	# define inline_speed static noinline	576	# define inline_speed static noinline
494	#endif	577	#endif
495		578
496	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	579	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
511	#define ev_active(w) ((W)(w))->active	594	#define ev_active(w) ((W)(w))->active
512	#define ev_at(w) ((WT)(w))->at	595	#define ev_at(w) ((WT)(w))->at
513		596
514	#if EV_USE_REALTIME	597	#if EV_USE_REALTIME
515	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	598	/* 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 */	599	/* giving it a reasonably high chance of working on typical architectures */
517	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */	600	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
518	#endif	601	#endif
519		602
520	#if EV_USE_MONOTONIC	603	#if EV_USE_MONOTONIC
521	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	604	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
…		…
535	# include "ev_win32.c"	618	# include "ev_win32.c"
536	#endif	619	#endif
537		620
538	/*****************************************************************************/	621	/*****************************************************************************/
539		622
		623	/* define a suitable floor function (only used by periodics atm) */
		624
		625	#if EV_USE_FLOOR
		626	# include <math.h>
		627	# define ev_floor(v) floor (v)
		628	#else
		629
		630	#include <float.h>
		631
		632	/* a floor() replacement function, should be independent of ev_tstamp type */
		633	static ev_tstamp noinline
		634	ev_floor (ev_tstamp v)
		635	{
		636	/* the choice of shift factor is not terribly important */
		637	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		638	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		639	#else
		640	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		641	#endif
		642
		643	/* argument too large for an unsigned long? */
		644	if (expect_false (v >= shift))
		645	{
		646	ev_tstamp f;
		647
		648	if (v == v - 1.)
		649	return v; /* very large number */
		650
		651	f = shift * ev_floor (v * (1. / shift));
		652	return f + ev_floor (v - f);
		653	}
		654
		655	/* special treatment for negative args? */
		656	if (expect_false (v < 0.))
		657	{
		658	ev_tstamp f = -ev_floor (-v);
		659
		660	return f - (f == v ? 0 : 1);
		661	}
		662
		663	/* fits into an unsigned long */
		664	return (unsigned long)v;
		665	}
		666
		667	#endif
		668
		669	/*****************************************************************************/
		670
		671	#ifdef __linux
		672	# include <sys/utsname.h>
		673	#endif
		674
		675	static unsigned int noinline ecb_cold
		676	ev_linux_version (void)
		677	{
		678	#ifdef __linux
		679	unsigned int v = 0;
		680	struct utsname buf;
		681	int i;
		682	char *p = buf.release;
		683
		684	if (uname (&buf))
		685	return 0;
		686
		687	for (i = 3+1; --i; )
		688	{
		689	unsigned int c = 0;
		690
		691	for (;;)
		692	{
		693	if (*p >= '0' && *p <= '9')
		694	c = c * 10 + *p++ - '0';
		695	else
		696	{
		697	p += *p == '.';
		698	break;
		699	}
		700	}
		701
		702	v = (v << 8) | c;
		703	}
		704
		705	return v;
		706	#else
		707	return 0;
		708	#endif
		709	}
		710
		711	/*****************************************************************************/
		712
540	#if EV_AVOID_STDIO	713	#if EV_AVOID_STDIO
541	static void noinline	714	static void noinline ecb_cold
542	ev_printerr (const char *msg)	715	ev_printerr (const char *msg)
543	{	716	{
544	write (STDERR_FILENO, msg, strlen (msg));	717	write (STDERR_FILENO, msg, strlen (msg));
545	}	718	}
546	#endif	719	#endif
547		720
548	static void (*syserr_cb)(const char *msg);	721	static void (*syserr_cb)(const char *msg);
549		722
550	void	723	void ecb_cold
551	ev_set_syserr_cb (void (*cb)(const char *msg))	724	ev_set_syserr_cb (void (*cb)(const char *msg))
552	{	725	{
553	syserr_cb = cb;	726	syserr_cb = cb;
554	}	727	}
555		728
556	static void noinline	729	static void noinline ecb_cold
557	ev_syserr (const char *msg)	730	ev_syserr (const char *msg)
558	{	731	{
559	if (!msg)	732	if (!msg)
560	msg = "(libev) system error";	733	msg = "(libev) system error";
561		734
562	if (syserr_cb)	735	if (syserr_cb)
563	syserr_cb (msg);	736	syserr_cb (msg);
564	else	737	else
565	{	738	{
566	#if EV_AVOID_STDIO	739	#if EV_AVOID_STDIO
567	const char *err = strerror (errno);
568
569	ev_printerr (msg);	740	ev_printerr (msg);
570	ev_printerr (": ");	741	ev_printerr (": ");
571	ev_printerr (err);	742	ev_printerr (strerror (errno));
572	ev_printerr ("\n");	743	ev_printerr ("\n");
573	#else	744	#else
574	perror (msg);	745	perror (msg);
575	#endif	746	#endif
576	abort ();	747	abort ();
…		…
596	#endif	767	#endif
597	}	768	}
598		769
599	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	770	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
600		771
601	void	772	void ecb_cold
602	ev_set_allocator (void *(*cb)(void *ptr, long size))	773	ev_set_allocator (void *(*cb)(void *ptr, long size))
603	{	774	{
604	alloc = cb;	775	alloc = cb;
605	}	776	}
606		777
…		…
610	ptr = alloc (ptr, size);	781	ptr = alloc (ptr, size);
611		782
612	if (!ptr && size)	783	if (!ptr && size)
613	{	784	{
614	#if EV_AVOID_STDIO	785	#if EV_AVOID_STDIO
615	ev_printerr ("libev: memory allocation failed, aborting.\n");	786	ev_printerr ("(libev) memory allocation failed, aborting.\n");
616	#else	787	#else
617	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	788	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
618	#endif	789	#endif
619	abort ();	790	abort ();
620	}	791	}
621		792
622	return ptr;	793	return ptr;
…		…
639	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	810	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
640	unsigned char unused;	811	unsigned char unused;
641	#if EV_USE_EPOLL	812	#if EV_USE_EPOLL
642	unsigned int egen; /* generation counter to counter epoll bugs */	813	unsigned int egen; /* generation counter to counter epoll bugs */
643	#endif	814	#endif
644	#if EV_SELECT_IS_WINSOCKET	815	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
645	SOCKET handle;	816	SOCKET handle;
		817	#endif
		818	#if EV_USE_IOCP
		819	OVERLAPPED or, ow;
646	#endif	820	#endif
647	} ANFD;	821	} ANFD;
648		822
649	/* stores the pending event set for a given watcher */	823	/* stores the pending event set for a given watcher */
650	typedef struct	824	typedef struct
…		…
715	# define EV_RELEASE_CB (void)0	889	# define EV_RELEASE_CB (void)0
716	# define EV_ACQUIRE_CB (void)0	890	# define EV_ACQUIRE_CB (void)0
717	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	891	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
718	#endif	892	#endif
719		893
720	#define EVUNLOOP_RECURSE 0x80	894	#define EVBREAK_RECURSE 0x80
721		895
722	/*****************************************************************************/	896	/*****************************************************************************/
723		897
724	#ifndef EV_HAVE_EV_TIME	898	#ifndef EV_HAVE_EV_TIME
725	ev_tstamp	899	ev_tstamp
…		…
769	if (delay > 0.)	943	if (delay > 0.)
770	{	944	{
771	#if EV_USE_NANOSLEEP	945	#if EV_USE_NANOSLEEP
772	struct timespec ts;	946	struct timespec ts;
773		947
774	ts.tv_sec = (time_t)delay;	948	EV_TS_SET (ts, delay);
775	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
776
777	nanosleep (&ts, 0);	949	nanosleep (&ts, 0);
778	#elif defined(_WIN32)	950	#elif defined(_WIN32)
779	Sleep ((unsigned long)(delay * 1e3));	951	Sleep ((unsigned long)(delay * 1e3));
780	#else	952	#else
781	struct timeval tv;	953	struct timeval tv;
782		954
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 */	955	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
787	/* something not guaranteed by newer posix versions, but guaranteed */	956	/* something not guaranteed by newer posix versions, but guaranteed */
788	/* by older ones */	957	/* by older ones */
		958	EV_TV_SET (tv, delay);
789	select (0, 0, 0, 0, &tv);	959	select (0, 0, 0, 0, &tv);
790	#endif	960	#endif
791	}	961	}
792	}	962	}
793		963
794	/*****************************************************************************/	964	/*****************************************************************************/
795		965
796	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	966	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
797		967
798	/* find a suitable new size for the given array, */	968	/* find a suitable new size for the given array, */
799	/* hopefully by rounding to a ncie-to-malloc size */	969	/* hopefully by rounding to a nice-to-malloc size */
800	inline_size int	970	inline_size int
801	array_nextsize (int elem, int cur, int cnt)	971	array_nextsize (int elem, int cur, int cnt)
802	{	972	{
803	int ncur = cur + 1;	973	int ncur = cur + 1;
804		974
…		…
816	}	986	}
817		987
818	return ncur;	988	return ncur;
819	}	989	}
820		990
821	static noinline void *	991	static void * noinline ecb_cold
822	array_realloc (int elem, void *base, int *cur, int cnt)	992	array_realloc (int elem, void *base, int *cur, int cnt)
823	{	993	{
824	*cur = array_nextsize (elem, *cur, cnt);	994	*cur = array_nextsize (elem, *cur, cnt);
825	return ev_realloc (base, elem * *cur);	995	return ev_realloc (base, elem * *cur);
826	}	996	}
…		…
829	memset ((void *)(base), 0, sizeof (*(base)) * (count))	999	memset ((void *)(base), 0, sizeof (*(base)) * (count))
830		1000
831	#define array_needsize(type,base,cur,cnt,init) \	1001	#define array_needsize(type,base,cur,cnt,init) \
832	if (expect_false ((cnt) > (cur))) \	1002	if (expect_false ((cnt) > (cur))) \
833	{ \	1003	{ \
834	int ocur_ = (cur); \	1004	int ecb_unused ocur_ = (cur); \
835	(base) = (type *)array_realloc \	1005	(base) = (type *)array_realloc \
836	(sizeof (type), (base), &(cur), (cnt)); \	1006	(sizeof (type), (base), &(cur), (cnt)); \
837	init ((base) + (ocur_), (cur) - ocur_); \	1007	init ((base) + (ocur_), (cur) - ocur_); \
838	}	1008	}
839		1009
…		…
939	inline_size void	1109	inline_size void
940	fd_reify (EV_P)	1110	fd_reify (EV_P)
941	{	1111	{
942	int i;	1112	int i;
943		1113
		1114	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		1115	for (i = 0; i < fdchangecnt; ++i)
		1116	{
		1117	int fd = fdchanges [i];
		1118	ANFD *anfd = anfds + fd;
		1119
		1120	if (anfd->reify & EV__IOFDSET && anfd->head)
		1121	{
		1122	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1123
		1124	if (handle != anfd->handle)
		1125	{
		1126	unsigned long arg;
		1127
		1128	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1129
		1130	/* handle changed, but fd didn't - we need to do it in two steps */
		1131	backend_modify (EV_A_ fd, anfd->events, 0);
		1132	anfd->events = 0;
		1133	anfd->handle = handle;
		1134	}
		1135	}
		1136	}
		1137	#endif
		1138
944	for (i = 0; i < fdchangecnt; ++i)	1139	for (i = 0; i < fdchangecnt; ++i)
945	{	1140	{
946	int fd = fdchanges [i];	1141	int fd = fdchanges [i];
947	ANFD *anfd = anfds + fd;	1142	ANFD *anfd = anfds + fd;
948	ev_io *w;	1143	ev_io *w;
949		1144
950	unsigned char events = 0;	1145	unsigned char o_events = anfd->events;
		1146	unsigned char o_reify = anfd->reify;
951		1147
952	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1148	anfd->reify = 0;
953	events |= (unsigned char)w->events;
954		1149
955	#if EV_SELECT_IS_WINSOCKET	1150	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
956	if (events)
957	{	1151	{
958	unsigned long arg;	1152	anfd->events = 0;
959	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1153
960	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1154	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		1155	anfd->events |= (unsigned char)w->events;
		1156
		1157	if (o_events != anfd->events)
		1158	o_reify = EV__IOFDSET; /* actually |= */
961	}	1159	}
962	#endif
963		1160
964	{	1161	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);	1162	backend_modify (EV_A_ fd, o_events, anfd->events);
973	}
974	}	1163	}
975		1164
976	fdchangecnt = 0;	1165	fdchangecnt = 0;
977	}	1166	}
978		1167
…		…
990	fdchanges [fdchangecnt - 1] = fd;	1179	fdchanges [fdchangecnt - 1] = fd;
991	}	1180	}
992	}	1181	}
993		1182
994	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1183	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
995	inline_speed void	1184	inline_speed void ecb_cold
996	fd_kill (EV_P_ int fd)	1185	fd_kill (EV_P_ int fd)
997	{	1186	{
998	ev_io *w;	1187	ev_io *w;
999		1188
1000	while ((w = (ev_io *)anfds [fd].head))	1189	while ((w = (ev_io *)anfds [fd].head))
…		…
1003	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1192	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1004	}	1193	}
1005	}	1194	}
1006		1195
1007	/* check whether the given fd is actually valid, for error recovery */	1196	/* check whether the given fd is actually valid, for error recovery */
1008	inline_size int	1197	inline_size int ecb_cold
1009	fd_valid (int fd)	1198	fd_valid (int fd)
1010	{	1199	{
1011	#ifdef _WIN32	1200	#ifdef _WIN32
1012	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1201	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1013	#else	1202	#else
1014	return fcntl (fd, F_GETFD) != -1;	1203	return fcntl (fd, F_GETFD) != -1;
1015	#endif	1204	#endif
1016	}	1205	}
1017		1206
1018	/* called on EBADF to verify fds */	1207	/* called on EBADF to verify fds */
1019	static void noinline	1208	static void noinline ecb_cold
1020	fd_ebadf (EV_P)	1209	fd_ebadf (EV_P)
1021	{	1210	{
1022	int fd;	1211	int fd;
1023		1212
1024	for (fd = 0; fd < anfdmax; ++fd)	1213	for (fd = 0; fd < anfdmax; ++fd)
…		…
1026	if (!fd_valid (fd) && errno == EBADF)	1215	if (!fd_valid (fd) && errno == EBADF)
1027	fd_kill (EV_A_ fd);	1216	fd_kill (EV_A_ fd);
1028	}	1217	}
1029		1218
1030	/* called on ENOMEM in select/poll to kill some fds and retry */	1219	/* called on ENOMEM in select/poll to kill some fds and retry */
1031	static void noinline	1220	static void noinline ecb_cold
1032	fd_enomem (EV_P)	1221	fd_enomem (EV_P)
1033	{	1222	{
1034	int fd;	1223	int fd;
1035		1224
1036	for (fd = anfdmax; fd--; )	1225	for (fd = anfdmax; fd--; )
…		…
1071	}	1260	}
1072		1261
1073	/*****************************************************************************/	1262	/*****************************************************************************/
1074		1263
1075	/*	1264	/*
1076	* the heap functions want a real array index. array index 0 uis guaranteed to not	1265	* 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	1266	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1078	* the branching factor of the d-tree.	1267	* the branching factor of the d-tree.
1079	*/	1268	*/
1080		1269
1081	/*	1270	/*
…		…
1231		1420
1232	/*****************************************************************************/	1421	/*****************************************************************************/
1233		1422
1234	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE	1423	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1235		1424
1236	static void noinline	1425	static void noinline ecb_cold
1237	evpipe_init (EV_P)	1426	evpipe_init (EV_P)
1238	{	1427	{
1239	if (!ev_is_active (&pipe_w))	1428	if (!ev_is_active (&pipe_w))
1240	{	1429	{
1241	# if EV_USE_EVENTFD	1430	# if EV_USE_EVENTFD
…		…
1263	ev_io_start (EV_A_ &pipe_w);	1452	ev_io_start (EV_A_ &pipe_w);
1264	ev_unref (EV_A); /* watcher should not keep loop alive */	1453	ev_unref (EV_A); /* watcher should not keep loop alive */
1265	}	1454	}
1266	}	1455	}
1267		1456
1268	inline_size void	1457	inline_speed void
1269	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1458	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1270	{	1459	{
1271	if (!*flag)	1460	if (expect_true (*flag))
		1461	/*return*//*D*/;
		1462
		1463	*flag = 1;
		1464
		1465	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1466
		1467	pipe_write_skipped = 1;
		1468
		1469	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1470
		1471	if (pipe_write_wanted)
1272	{	1472	{
		1473	int old_errno;
		1474
		1475	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1476
1273	int old_errno = errno; /* save errno because write might clobber it */	1477	old_errno = errno; /* save errno because write will clobber it */
1274	char dummy;
1275
1276	*flag = 1;
1277		1478
1278	#if EV_USE_EVENTFD	1479	#if EV_USE_EVENTFD
1279	if (evfd >= 0)	1480	if (evfd >= 0)
1280	{	1481	{
1281	uint64_t counter = 1;	1482	uint64_t counter = 1;
1282	write (evfd, &counter, sizeof (uint64_t));	1483	write (evfd, &counter, sizeof (uint64_t));
1283	}	1484	}
1284	else	1485	else
1285	#endif	1486	#endif
		1487	{
		1488	/* win32 people keep sending patches that change this write() to send() */
		1489	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1490	/* so when you think this write should be a send instead, please find out */
		1491	/* where your send() is from - it's definitely not the microsoft send, and */
		1492	/* tell me. thank you. */
1286	write (evpipe [1], &dummy, 1);	1493	write (evpipe [1], &(evpipe [1]), 1);
		1494	}
1287		1495
1288	errno = old_errno;	1496	errno = old_errno;
1289	}	1497	}
1290	}	1498	}
1291		1499
…		…
1294	static void	1502	static void
1295	pipecb (EV_P_ ev_io *iow, int revents)	1503	pipecb (EV_P_ ev_io *iow, int revents)
1296	{	1504	{
1297	int i;	1505	int i;
1298		1506
		1507	if (revents & EV_READ)
		1508	{
1299	#if EV_USE_EVENTFD	1509	#if EV_USE_EVENTFD
1300	if (evfd >= 0)	1510	if (evfd >= 0)
1301	{	1511	{
1302	uint64_t counter;	1512	uint64_t counter;
1303	read (evfd, &counter, sizeof (uint64_t));	1513	read (evfd, &counter, sizeof (uint64_t));
1304	}	1514	}
1305	else	1515	else
1306	#endif	1516	#endif
1307	{	1517	{
1308	char dummy;	1518	char dummy;
		1519	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1309	read (evpipe [0], &dummy, 1);	1520	read (evpipe [0], &dummy, 1);
		1521	}
1310	}	1522	}
1311		1523
		1524	pipe_write_skipped = 0;
		1525
		1526	#if EV_SIGNAL_ENABLE
1312	if (sig_pending)	1527	if (sig_pending)
1313	{	1528	{
1314	sig_pending = 0;	1529	sig_pending = 0;
1315		1530
1316	for (i = EV_NSIG - 1; i--; )	1531	for (i = EV_NSIG - 1; i--; )
1317	if (expect_false (signals [i].pending))	1532	if (expect_false (signals [i].pending))
1318	ev_feed_signal_event (EV_A_ i + 1);	1533	ev_feed_signal_event (EV_A_ i + 1);
1319	}	1534	}
		1535	#endif
1320		1536
1321	#if EV_ASYNC_ENABLE	1537	#if EV_ASYNC_ENABLE
1322	if (async_pending)	1538	if (async_pending)
1323	{	1539	{
1324	async_pending = 0;	1540	async_pending = 0;
…		…
1333	#endif	1549	#endif
1334	}	1550	}
1335		1551
1336	/*****************************************************************************/	1552	/*****************************************************************************/
1337		1553
		1554	void
		1555	ev_feed_signal (int signum)
		1556	{
		1557	#if EV_MULTIPLICITY
		1558	EV_P = signals [signum - 1].loop;
		1559
		1560	if (!EV_A)
		1561	return;
		1562	#endif
		1563
		1564	if (!ev_active (&pipe_w))
		1565	return;
		1566
		1567	signals [signum - 1].pending = 1;
		1568	evpipe_write (EV_A_ &sig_pending);
		1569	}
		1570
1338	static void	1571	static void
1339	ev_sighandler (int signum)	1572	ev_sighandler (int signum)
1340	{	1573	{
1341	#if EV_MULTIPLICITY
1342	EV_P = signals [signum - 1].loop;
1343	#endif
1344
1345	#ifdef _WIN32	1574	#ifdef _WIN32
1346	signal (signum, ev_sighandler);	1575	signal (signum, ev_sighandler);
1347	#endif	1576	#endif
1348		1577
1349	signals [signum - 1].pending = 1;	1578	ev_feed_signal (signum);
1350	evpipe_write (EV_A_ &sig_pending);
1351	}	1579	}
1352		1580
1353	void noinline	1581	void noinline
1354	ev_feed_signal_event (EV_P_ int signum)	1582	ev_feed_signal_event (EV_P_ int signum)
1355	{	1583	{
…		…
1455		1683
1456	#endif	1684	#endif
1457		1685
1458	/*****************************************************************************/	1686	/*****************************************************************************/
1459		1687
		1688	#if EV_USE_IOCP
		1689	# include "ev_iocp.c"
		1690	#endif
1460	#if EV_USE_PORT	1691	#if EV_USE_PORT
1461	# include "ev_port.c"	1692	# include "ev_port.c"
1462	#endif	1693	#endif
1463	#if EV_USE_KQUEUE	1694	#if EV_USE_KQUEUE
1464	# include "ev_kqueue.c"	1695	# include "ev_kqueue.c"
…		…
1471	#endif	1702	#endif
1472	#if EV_USE_SELECT	1703	#if EV_USE_SELECT
1473	# include "ev_select.c"	1704	# include "ev_select.c"
1474	#endif	1705	#endif
1475		1706
1476	int	1707	int ecb_cold
1477	ev_version_major (void)	1708	ev_version_major (void)
1478	{	1709	{
1479	return EV_VERSION_MAJOR;	1710	return EV_VERSION_MAJOR;
1480	}	1711	}
1481		1712
1482	int	1713	int ecb_cold
1483	ev_version_minor (void)	1714	ev_version_minor (void)
1484	{	1715	{
1485	return EV_VERSION_MINOR;	1716	return EV_VERSION_MINOR;
1486	}	1717	}
1487		1718
1488	/* return true if we are running with elevated privileges and should ignore env variables */	1719	/* return true if we are running with elevated privileges and should ignore env variables */
1489	int inline_size	1720	int inline_size ecb_cold
1490	enable_secure (void)	1721	enable_secure (void)
1491	{	1722	{
1492	#ifdef _WIN32	1723	#ifdef _WIN32
1493	return 0;	1724	return 0;
1494	#else	1725	#else
1495	return getuid () != geteuid ()	1726	return getuid () != geteuid ()
1496	|| getgid () != getegid ();	1727	|| getgid () != getegid ();
1497	#endif	1728	#endif
1498	}	1729	}
1499		1730
1500	unsigned int	1731	unsigned int ecb_cold
1501	ev_supported_backends (void)	1732	ev_supported_backends (void)
1502	{	1733	{
1503	unsigned int flags = 0;	1734	unsigned int flags = 0;
1504		1735
1505	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	1736	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
…		…
1509	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;	1740	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1510		1741
1511	return flags;	1742	return flags;
1512	}	1743	}
1513		1744
1514	unsigned int	1745	unsigned int ecb_cold
1515	ev_recommended_backends (void)	1746	ev_recommended_backends (void)
1516	{	1747	{
1517	unsigned int flags = ev_supported_backends ();	1748	unsigned int flags = ev_supported_backends ();
1518		1749
1519	#ifndef __NetBSD__	1750	#ifndef __NetBSD__
…		…
1531	#endif	1762	#endif
1532		1763
1533	return flags;	1764	return flags;
1534	}	1765	}
1535		1766
1536	unsigned int	1767	unsigned int ecb_cold
1537	ev_embeddable_backends (void)	1768	ev_embeddable_backends (void)
1538	{	1769	{
1539	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	1770	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1540		1771
1541	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1772	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1542	/* please fix it and tell me how to detect the fix */	1773	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1543	flags &= ~EVBACKEND_EPOLL;	1774	flags &= ~EVBACKEND_EPOLL;
1544		1775
1545	return flags;	1776	return flags;
1546	}	1777	}
1547		1778
1548	unsigned int	1779	unsigned int
…		…
1586	ev_userdata (EV_P)	1817	ev_userdata (EV_P)
1587	{	1818	{
1588	return userdata;	1819	return userdata;
1589	}	1820	}
1590		1821
		1822	void
1591	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1823	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1592	{	1824	{
1593	invoke_cb = invoke_pending_cb;	1825	invoke_cb = invoke_pending_cb;
1594	}	1826	}
1595		1827
		1828	void
1596	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))	1829	ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1597	{	1830	{
1598	release_cb = release;	1831	release_cb = release;
1599	acquire_cb = acquire;	1832	acquire_cb = acquire;
1600	}	1833	}
1601	#endif	1834	#endif
1602		1835
1603	/* initialise a loop structure, must be zero-initialised */	1836	/* initialise a loop structure, must be zero-initialised */
1604	static void noinline	1837	static void noinline ecb_cold
1605	loop_init (EV_P_ unsigned int flags)	1838	loop_init (EV_P_ unsigned int flags)
1606	{	1839	{
1607	if (!backend)	1840	if (!backend)
1608	{	1841	{
		1842	origflags = flags;
		1843
1609	#if EV_USE_REALTIME	1844	#if EV_USE_REALTIME
1610	if (!have_realtime)	1845	if (!have_realtime)
1611	{	1846	{
1612	struct timespec ts;	1847	struct timespec ts;
1613		1848
…		…
1635	if (!(flags & EVFLAG_NOENV)	1870	if (!(flags & EVFLAG_NOENV)
1636	&& !enable_secure ()	1871	&& !enable_secure ()
1637	&& getenv ("LIBEV_FLAGS"))	1872	&& getenv ("LIBEV_FLAGS"))
1638	flags = atoi (getenv ("LIBEV_FLAGS"));	1873	flags = atoi (getenv ("LIBEV_FLAGS"));
1639		1874
1640	ev_rt_now = ev_time ();	1875	ev_rt_now = ev_time ();
1641	mn_now = get_clock ();	1876	mn_now = get_clock ();
1642	now_floor = mn_now;	1877	now_floor = mn_now;
1643	rtmn_diff = ev_rt_now - mn_now;	1878	rtmn_diff = ev_rt_now - mn_now;
1644	#if EV_FEATURE_API	1879	#if EV_FEATURE_API
1645	invoke_cb = ev_invoke_pending;	1880	invoke_cb = ev_invoke_pending;
1646	#endif	1881	#endif
1647		1882
1648	io_blocktime = 0.;	1883	io_blocktime = 0.;
1649	timeout_blocktime = 0.;	1884	timeout_blocktime = 0.;
1650	backend = 0;	1885	backend = 0;
1651	backend_fd = -1;	1886	backend_fd = -1;
1652	sig_pending = 0;	1887	sig_pending = 0;
1653	#if EV_ASYNC_ENABLE	1888	#if EV_ASYNC_ENABLE
1654	async_pending = 0;	1889	async_pending = 0;
1655	#endif	1890	#endif
		1891	pipe_write_skipped = 0;
		1892	pipe_write_wanted = 0;
1656	#if EV_USE_INOTIFY	1893	#if EV_USE_INOTIFY
1657	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1894	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1658	#endif	1895	#endif
1659	#if EV_USE_SIGNALFD	1896	#if EV_USE_SIGNALFD
1660	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1897	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1661	#endif	1898	#endif
1662		1899
1663	if (!(flags & 0x0000ffffU))	1900	if (!(flags & EVBACKEND_MASK))
1664	flags |= ev_recommended_backends ();	1901	flags |= ev_recommended_backends ();
1665		1902
		1903	#if EV_USE_IOCP
		1904	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1905	#endif
1666	#if EV_USE_PORT	1906	#if EV_USE_PORT
1667	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1907	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1668	#endif	1908	#endif
1669	#if EV_USE_KQUEUE	1909	#if EV_USE_KQUEUE
1670	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1910	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1687	#endif	1927	#endif
1688	}	1928	}
1689	}	1929	}
1690		1930
1691	/* free up a loop structure */	1931	/* free up a loop structure */
1692	static void noinline	1932	void ecb_cold
1693	loop_destroy (EV_P)	1933	ev_loop_destroy (EV_P)
1694	{	1934	{
1695	int i;	1935	int i;
		1936
		1937	#if EV_MULTIPLICITY
		1938	/* mimic free (0) */
		1939	if (!EV_A)
		1940	return;
		1941	#endif
		1942
		1943	#if EV_CLEANUP_ENABLE
		1944	/* queue cleanup watchers (and execute them) */
		1945	if (expect_false (cleanupcnt))
		1946	{
		1947	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1948	EV_INVOKE_PENDING;
		1949	}
		1950	#endif
		1951
		1952	#if EV_CHILD_ENABLE
		1953	if (ev_is_active (&childev))
		1954	{
		1955	ev_ref (EV_A); /* child watcher */
		1956	ev_signal_stop (EV_A_ &childev);
		1957	}
		1958	#endif
1696		1959
1697	if (ev_is_active (&pipe_w))	1960	if (ev_is_active (&pipe_w))
1698	{	1961	{
1699	/*ev_ref (EV_A);*/	1962	/*ev_ref (EV_A);*/
1700	/*ev_io_stop (EV_A_ &pipe_w);*/	1963	/*ev_io_stop (EV_A_ &pipe_w);*/
…		…
1722	#endif	1985	#endif
1723		1986
1724	if (backend_fd >= 0)	1987	if (backend_fd >= 0)
1725	close (backend_fd);	1988	close (backend_fd);
1726		1989
		1990	#if EV_USE_IOCP
		1991	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1992	#endif
1727	#if EV_USE_PORT	1993	#if EV_USE_PORT
1728	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1994	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1729	#endif	1995	#endif
1730	#if EV_USE_KQUEUE	1996	#if EV_USE_KQUEUE
1731	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1997	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1758	array_free (periodic, EMPTY);	2024	array_free (periodic, EMPTY);
1759	#endif	2025	#endif
1760	#if EV_FORK_ENABLE	2026	#if EV_FORK_ENABLE
1761	array_free (fork, EMPTY);	2027	array_free (fork, EMPTY);
1762	#endif	2028	#endif
		2029	#if EV_CLEANUP_ENABLE
		2030	array_free (cleanup, EMPTY);
		2031	#endif
1763	array_free (prepare, EMPTY);	2032	array_free (prepare, EMPTY);
1764	array_free (check, EMPTY);	2033	array_free (check, EMPTY);
1765	#if EV_ASYNC_ENABLE	2034	#if EV_ASYNC_ENABLE
1766	array_free (async, EMPTY);	2035	array_free (async, EMPTY);
1767	#endif	2036	#endif
1768		2037
1769	backend = 0;	2038	backend = 0;
		2039
		2040	#if EV_MULTIPLICITY
		2041	if (ev_is_default_loop (EV_A))
		2042	#endif
		2043	ev_default_loop_ptr = 0;
		2044	#if EV_MULTIPLICITY
		2045	else
		2046	ev_free (EV_A);
		2047	#endif
1770	}	2048	}
1771		2049
1772	#if EV_USE_INOTIFY	2050	#if EV_USE_INOTIFY
1773	inline_size void infy_fork (EV_P);	2051	inline_size void infy_fork (EV_P);
1774	#endif	2052	#endif
…		…
1789	infy_fork (EV_A);	2067	infy_fork (EV_A);
1790	#endif	2068	#endif
1791		2069
1792	if (ev_is_active (&pipe_w))	2070	if (ev_is_active (&pipe_w))
1793	{	2071	{
1794	/* this "locks" the handlers against writing to the pipe */	2072	/* 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		2073
1801	ev_ref (EV_A);	2074	ev_ref (EV_A);
1802	ev_io_stop (EV_A_ &pipe_w);	2075	ev_io_stop (EV_A_ &pipe_w);
1803		2076
1804	#if EV_USE_EVENTFD	2077	#if EV_USE_EVENTFD
…		…
1822	postfork = 0;	2095	postfork = 0;
1823	}	2096	}
1824		2097
1825	#if EV_MULTIPLICITY	2098	#if EV_MULTIPLICITY
1826		2099
1827	struct ev_loop *	2100	struct ev_loop * ecb_cold
1828	ev_loop_new (unsigned int flags)	2101	ev_loop_new (unsigned int flags)
1829	{	2102	{
1830	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2103	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1831		2104
1832	memset (EV_A, 0, sizeof (struct ev_loop));	2105	memset (EV_A, 0, sizeof (struct ev_loop));
1833	loop_init (EV_A_ flags);	2106	loop_init (EV_A_ flags);
1834		2107
1835	if (ev_backend (EV_A))	2108	if (ev_backend (EV_A))
1836	return EV_A;	2109	return EV_A;
1837		2110
		2111	ev_free (EV_A);
1838	return 0;	2112	return 0;
1839	}	2113	}
1840		2114
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 */	2115	#endif /* multiplicity */
1854		2116
1855	#if EV_VERIFY	2117	#if EV_VERIFY
1856	static void noinline	2118	static void noinline ecb_cold
1857	verify_watcher (EV_P_ W w)	2119	verify_watcher (EV_P_ W w)
1858	{	2120	{
1859	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2121	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1860		2122
1861	if (w->pending)	2123	if (w->pending)
1862	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2124	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1863	}	2125	}
1864		2126
1865	static void noinline	2127	static void noinline ecb_cold
1866	verify_heap (EV_P_ ANHE *heap, int N)	2128	verify_heap (EV_P_ ANHE *heap, int N)
1867	{	2129	{
1868	int i;	2130	int i;
1869		2131
1870	for (i = HEAP0; i < N + HEAP0; ++i)	2132	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1875		2137
1876	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2138	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1877	}	2139	}
1878	}	2140	}
1879		2141
1880	static void noinline	2142	static void noinline ecb_cold
1881	array_verify (EV_P_ W *ws, int cnt)	2143	array_verify (EV_P_ W *ws, int cnt)
1882	{	2144	{
1883	while (cnt--)	2145	while (cnt--)
1884	{	2146	{
1885	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2147	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1887	}	2149	}
1888	}	2150	}
1889	#endif	2151	#endif
1890		2152
1891	#if EV_FEATURE_API	2153	#if EV_FEATURE_API
1892	void	2154	void ecb_cold
1893	ev_verify (EV_P)	2155	ev_verify (EV_P)
1894	{	2156	{
1895	#if EV_VERIFY	2157	#if EV_VERIFY
1896	int i;	2158	int i;
1897	WL w;	2159	WL w;
…		…
1932	#if EV_FORK_ENABLE	2194	#if EV_FORK_ENABLE
1933	assert (forkmax >= forkcnt);	2195	assert (forkmax >= forkcnt);
1934	array_verify (EV_A_ (W *)forks, forkcnt);	2196	array_verify (EV_A_ (W *)forks, forkcnt);
1935	#endif	2197	#endif
1936		2198
		2199	#if EV_CLEANUP_ENABLE
		2200	assert (cleanupmax >= cleanupcnt);
		2201	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2202	#endif
		2203
1937	#if EV_ASYNC_ENABLE	2204	#if EV_ASYNC_ENABLE
1938	assert (asyncmax >= asynccnt);	2205	assert (asyncmax >= asynccnt);
1939	array_verify (EV_A_ (W *)asyncs, asynccnt);	2206	array_verify (EV_A_ (W *)asyncs, asynccnt);
1940	#endif	2207	#endif
1941		2208
…		…
1958	#endif	2225	#endif
1959	}	2226	}
1960	#endif	2227	#endif
1961		2228
1962	#if EV_MULTIPLICITY	2229	#if EV_MULTIPLICITY
1963	struct ev_loop *	2230	struct ev_loop * ecb_cold
1964	ev_default_loop_init (unsigned int flags)
1965	#else	2231	#else
1966	int	2232	int
		2233	#endif
1967	ev_default_loop (unsigned int flags)	2234	ev_default_loop (unsigned int flags)
1968	#endif
1969	{	2235	{
1970	if (!ev_default_loop_ptr)	2236	if (!ev_default_loop_ptr)
1971	{	2237	{
1972	#if EV_MULTIPLICITY	2238	#if EV_MULTIPLICITY
1973	EV_P = ev_default_loop_ptr = &default_loop_struct;	2239	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1992		2258
1993	return ev_default_loop_ptr;	2259	return ev_default_loop_ptr;
1994	}	2260	}
1995		2261
1996	void	2262	void
1997	ev_default_destroy (void)	2263	ev_loop_fork (EV_P)
1998	{	2264	{
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 */	2265	postfork = 1; /* must be in line with ev_default_fork */
2021	}	2266	}
2022		2267
2023	/*****************************************************************************/	2268	/*****************************************************************************/
2024		2269
2025	void	2270	void
…		…
2047		2292
2048	for (pri = NUMPRI; pri--; )	2293	for (pri = NUMPRI; pri--; )
2049	while (pendingcnt [pri])	2294	while (pendingcnt [pri])
2050	{	2295	{
2051	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2296	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		2297
2056	p->w->pending = 0;	2298	p->w->pending = 0;
2057	EV_CB_INVOKE (p->w, p->events);	2299	EV_CB_INVOKE (p->w, p->events);
2058	EV_FREQUENT_CHECK;	2300	EV_FREQUENT_CHECK;
2059	}	2301	}
…		…
2121	feed_reverse_done (EV_A_ EV_TIMER);	2363	feed_reverse_done (EV_A_ EV_TIMER);
2122	}	2364	}
2123	}	2365	}
2124		2366
2125	#if EV_PERIODIC_ENABLE	2367	#if EV_PERIODIC_ENABLE
		2368
		2369	static void noinline
		2370	periodic_recalc (EV_P_ ev_periodic *w)
		2371	{
		2372	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2373	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2374
		2375	/* the above almost always errs on the low side */
		2376	while (at <= ev_rt_now)
		2377	{
		2378	ev_tstamp nat = at + w->interval;
		2379
		2380	/* when resolution fails us, we use ev_rt_now */
		2381	if (expect_false (nat == at))
		2382	{
		2383	at = ev_rt_now;
		2384	break;
		2385	}
		2386
		2387	at = nat;
		2388	}
		2389
		2390	ev_at (w) = at;
		2391	}
		2392
2126	/* make periodics pending */	2393	/* make periodics pending */
2127	inline_size void	2394	inline_size void
2128	periodics_reify (EV_P)	2395	periodics_reify (EV_P)
2129	{	2396	{
2130	EV_FREQUENT_CHECK;	2397	EV_FREQUENT_CHECK;
…		…
2149	ANHE_at_cache (periodics [HEAP0]);	2416	ANHE_at_cache (periodics [HEAP0]);
2150	downheap (periodics, periodiccnt, HEAP0);	2417	downheap (periodics, periodiccnt, HEAP0);
2151	}	2418	}
2152	else if (w->interval)	2419	else if (w->interval)
2153	{	2420	{
2154	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2421	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]);	2422	ANHE_at_cache (periodics [HEAP0]);
2169	downheap (periodics, periodiccnt, HEAP0);	2423	downheap (periodics, periodiccnt, HEAP0);
2170	}	2424	}
2171	else	2425	else
2172	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2426	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2179	feed_reverse_done (EV_A_ EV_PERIODIC);	2433	feed_reverse_done (EV_A_ EV_PERIODIC);
2180	}	2434	}
2181	}	2435	}
2182		2436
2183	/* simply recalculate all periodics */	2437	/* simply recalculate all periodics */
2184	/* TODO: maybe ensure that at leats one event happens when jumping forward? */	2438	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2185	static void noinline	2439	static void noinline ecb_cold
2186	periodics_reschedule (EV_P)	2440	periodics_reschedule (EV_P)
2187	{	2441	{
2188	int i;	2442	int i;
2189		2443
2190	/* adjust periodics after time jump */	2444	/* adjust periodics after time jump */
…		…
2193	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);	2447	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2194		2448
2195	if (w->reschedule_cb)	2449	if (w->reschedule_cb)
2196	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2450	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2197	else if (w->interval)	2451	else if (w->interval)
2198	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2452	periodic_recalc (EV_A_ w);
2199		2453
2200	ANHE_at_cache (periodics [i]);	2454	ANHE_at_cache (periodics [i]);
2201	}	2455	}
2202		2456
2203	reheap (periodics, periodiccnt);	2457	reheap (periodics, periodiccnt);
2204	}	2458	}
2205	#endif	2459	#endif
2206		2460
2207	/* adjust all timers by a given offset */	2461	/* adjust all timers by a given offset */
2208	static void noinline	2462	static void noinline ecb_cold
2209	timers_reschedule (EV_P_ ev_tstamp adjust)	2463	timers_reschedule (EV_P_ ev_tstamp adjust)
2210	{	2464	{
2211	int i;	2465	int i;
2212		2466
2213	for (i = 0; i < timercnt; ++i)	2467	for (i = 0; i < timercnt; ++i)
…		…
2250	* doesn't hurt either as we only do this on time-jumps or	2504	* doesn't hurt either as we only do this on time-jumps or
2251	* in the unlikely event of having been preempted here.	2505	* in the unlikely event of having been preempted here.
2252	*/	2506	*/
2253	for (i = 4; --i; )	2507	for (i = 4; --i; )
2254	{	2508	{
		2509	ev_tstamp diff;
2255	rtmn_diff = ev_rt_now - mn_now;	2510	rtmn_diff = ev_rt_now - mn_now;
2256		2511
		2512	diff = odiff - rtmn_diff;
		2513
2257	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2514	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2258	return; /* all is well */	2515	return; /* all is well */
2259		2516
2260	ev_rt_now = ev_time ();	2517	ev_rt_now = ev_time ();
2261	mn_now = get_clock ();	2518	mn_now = get_clock ();
2262	now_floor = mn_now;	2519	now_floor = mn_now;
…		…
2285	mn_now = ev_rt_now;	2542	mn_now = ev_rt_now;
2286	}	2543	}
2287	}	2544	}
2288		2545
2289	void	2546	void
2290	ev_loop (EV_P_ int flags)	2547	ev_run (EV_P_ int flags)
2291	{	2548	{
2292	#if EV_FEATURE_API	2549	#if EV_FEATURE_API
2293	++loop_depth;	2550	++loop_depth;
2294	#endif	2551	#endif
2295		2552
2296	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2553	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2297		2554
2298	loop_done = EVUNLOOP_CANCEL;	2555	loop_done = EVBREAK_CANCEL;
2299		2556
2300	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2557	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2301		2558
2302	do	2559	do
2303	{	2560	{
…		…
2346	/* calculate blocking time */	2603	/* calculate blocking time */
2347	{	2604	{
2348	ev_tstamp waittime = 0.;	2605	ev_tstamp waittime = 0.;
2349	ev_tstamp sleeptime = 0.;	2606	ev_tstamp sleeptime = 0.;
2350		2607
		2608	/* remember old timestamp for io_blocktime calculation */
		2609	ev_tstamp prev_mn_now = mn_now;
		2610
		2611	/* update time to cancel out callback processing overhead */
		2612	time_update (EV_A_ 1e100);
		2613
		2614	/* from now on, we want a pipe-wake-up */
		2615	pipe_write_wanted = 1;
		2616
		2617	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2618
2351	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2619	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2352	{	2620	{
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;	2621	waittime = MAX_BLOCKTIME;
2360		2622
2361	if (timercnt)	2623	if (timercnt)
2362	{	2624	{
2363	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2625	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2364	if (waittime > to) waittime = to;	2626	if (waittime > to) waittime = to;
2365	}	2627	}
2366		2628
2367	#if EV_PERIODIC_ENABLE	2629	#if EV_PERIODIC_ENABLE
2368	if (periodiccnt)	2630	if (periodiccnt)
2369	{	2631	{
2370	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2632	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2371	if (waittime > to) waittime = to;	2633	if (waittime > to) waittime = to;
2372	}	2634	}
2373	#endif	2635	#endif
2374		2636
2375	/* don't let timeouts decrease the waittime below timeout_blocktime */	2637	/* don't let timeouts decrease the waittime below timeout_blocktime */
2376	if (expect_false (waittime < timeout_blocktime))	2638	if (expect_false (waittime < timeout_blocktime))
2377	waittime = timeout_blocktime;	2639	waittime = timeout_blocktime;
		2640
		2641	/* at this point, we NEED to wait, so we have to ensure */
		2642	/* to pass a minimum nonzero value to the backend */
		2643	if (expect_false (waittime < backend_mintime))
		2644	waittime = backend_mintime;
2378		2645
2379	/* extra check because io_blocktime is commonly 0 */	2646	/* extra check because io_blocktime is commonly 0 */
2380	if (expect_false (io_blocktime))	2647	if (expect_false (io_blocktime))
2381	{	2648	{
2382	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2649	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2383		2650
2384	if (sleeptime > waittime - backend_fudge)	2651	if (sleeptime > waittime - backend_mintime)
2385	sleeptime = waittime - backend_fudge;	2652	sleeptime = waittime - backend_mintime;
2386		2653
2387	if (expect_true (sleeptime > 0.))	2654	if (expect_true (sleeptime > 0.))
2388	{	2655	{
2389	ev_sleep (sleeptime);	2656	ev_sleep (sleeptime);
2390	waittime -= sleeptime;	2657	waittime -= sleeptime;
…		…
2393	}	2660	}
2394		2661
2395	#if EV_FEATURE_API	2662	#if EV_FEATURE_API
2396	++loop_count;	2663	++loop_count;
2397	#endif	2664	#endif
2398	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2665	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2399	backend_poll (EV_A_ waittime);	2666	backend_poll (EV_A_ waittime);
2400	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */	2667	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2668
		2669	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2670
		2671	if (pipe_write_skipped)
		2672	{
		2673	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2674	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2675	}
		2676
2401		2677
2402	/* update ev_rt_now, do magic */	2678	/* update ev_rt_now, do magic */
2403	time_update (EV_A_ waittime + sleeptime);	2679	time_update (EV_A_ waittime + sleeptime);
2404	}	2680	}
2405		2681
…		…
2423	EV_INVOKE_PENDING;	2699	EV_INVOKE_PENDING;
2424	}	2700	}
2425	while (expect_true (	2701	while (expect_true (
2426	activecnt	2702	activecnt
2427	&& !loop_done	2703	&& !loop_done
2428	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2704	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2429	));	2705	));
2430		2706
2431	if (loop_done == EVUNLOOP_ONE)	2707	if (loop_done == EVBREAK_ONE)
2432	loop_done = EVUNLOOP_CANCEL;	2708	loop_done = EVBREAK_CANCEL;
2433		2709
2434	#if EV_FEATURE_API	2710	#if EV_FEATURE_API
2435	--loop_depth;	2711	--loop_depth;
2436	#endif	2712	#endif
2437	}	2713	}
2438		2714
2439	void	2715	void
2440	ev_unloop (EV_P_ int how)	2716	ev_break (EV_P_ int how)
2441	{	2717	{
2442	loop_done = how;	2718	loop_done = how;
2443	}	2719	}
2444		2720
2445	void	2721	void
…		…
2593	EV_FREQUENT_CHECK;	2869	EV_FREQUENT_CHECK;
2594		2870
2595	wlist_del (&anfds[w->fd].head, (WL)w);	2871	wlist_del (&anfds[w->fd].head, (WL)w);
2596	ev_stop (EV_A_ (W)w);	2872	ev_stop (EV_A_ (W)w);
2597		2873
2598	fd_change (EV_A_ w->fd, 1);	2874	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2599		2875
2600	EV_FREQUENT_CHECK;	2876	EV_FREQUENT_CHECK;
2601	}	2877	}
2602		2878
2603	void noinline	2879	void noinline
…		…
2695	if (w->reschedule_cb)	2971	if (w->reschedule_cb)
2696	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2972	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2697	else if (w->interval)	2973	else if (w->interval)
2698	{	2974	{
2699	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2975	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2700	/* this formula differs from the one in periodic_reify because we do not always round up */	2976	periodic_recalc (EV_A_ w);
2701	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2702	}	2977	}
2703	else	2978	else
2704	ev_at (w) = w->offset;	2979	ev_at (w) = w->offset;
2705		2980
2706	EV_FREQUENT_CHECK;	2981	EV_FREQUENT_CHECK;
…		…
2827	sa.sa_handler = ev_sighandler;	3102	sa.sa_handler = ev_sighandler;
2828	sigfillset (&sa.sa_mask);	3103	sigfillset (&sa.sa_mask);
2829	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3104	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2830	sigaction (w->signum, &sa, 0);	3105	sigaction (w->signum, &sa, 0);
2831		3106
		3107	if (origflags & EVFLAG_NOSIGMASK)
		3108	{
2832	sigemptyset (&sa.sa_mask);	3109	sigemptyset (&sa.sa_mask);
2833	sigaddset (&sa.sa_mask, w->signum);	3110	sigaddset (&sa.sa_mask, w->signum);
2834	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3111	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3112	}
2835	#endif	3113	#endif
2836	}	3114	}
2837		3115
2838	EV_FREQUENT_CHECK;	3116	EV_FREQUENT_CHECK;
2839	}	3117	}
…		…
2980	if (!pend || pend == path)	3258	if (!pend || pend == path)
2981	break;	3259	break;
2982		3260
2983	*pend = 0;	3261	*pend = 0;
2984	w->wd = inotify_add_watch (fs_fd, path, mask);	3262	w->wd = inotify_add_watch (fs_fd, path, mask);
2985	}	3263	}
2986	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3264	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2987	}	3265	}
2988	}	3266	}
2989		3267
2990	if (w->wd >= 0)	3268	if (w->wd >= 0)
…		…
3057	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3335	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3058	ofs += sizeof (struct inotify_event) + ev->len;	3336	ofs += sizeof (struct inotify_event) + ev->len;
3059	}	3337	}
3060	}	3338	}
3061		3339
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	3340	inline_size void ecb_cold
3095	ev_check_2625 (EV_P)	3341	ev_check_2625 (EV_P)
3096	{	3342	{
3097	/* kernels < 2.6.25 are borked	3343	/* kernels < 2.6.25 are borked
3098	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3344	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3099	*/	3345	*/
…		…
3420		3666
3421	#if EV_EMBED_ENABLE	3667	#if EV_EMBED_ENABLE
3422	void noinline	3668	void noinline
3423	ev_embed_sweep (EV_P_ ev_embed *w)	3669	ev_embed_sweep (EV_P_ ev_embed *w)
3424	{	3670	{
3425	ev_loop (w->other, EVLOOP_NONBLOCK);	3671	ev_run (w->other, EVRUN_NOWAIT);
3426	}	3672	}
3427		3673
3428	static void	3674	static void
3429	embed_io_cb (EV_P_ ev_io *io, int revents)	3675	embed_io_cb (EV_P_ ev_io *io, int revents)
3430	{	3676	{
3431	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3677	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3432		3678
3433	if (ev_cb (w))	3679	if (ev_cb (w))
3434	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3680	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3435	else	3681	else
3436	ev_loop (w->other, EVLOOP_NONBLOCK);	3682	ev_run (w->other, EVRUN_NOWAIT);
3437	}	3683	}
3438		3684
3439	static void	3685	static void
3440	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3686	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3441	{	3687	{
…		…
3445	EV_P = w->other;	3691	EV_P = w->other;
3446		3692
3447	while (fdchangecnt)	3693	while (fdchangecnt)
3448	{	3694	{
3449	fd_reify (EV_A);	3695	fd_reify (EV_A);
3450	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3696	ev_run (EV_A_ EVRUN_NOWAIT);
3451	}	3697	}
3452	}	3698	}
3453	}	3699	}
3454		3700
3455	static void	3701	static void
…		…
3461		3707
3462	{	3708	{
3463	EV_P = w->other;	3709	EV_P = w->other;
3464		3710
3465	ev_loop_fork (EV_A);	3711	ev_loop_fork (EV_A);
3466	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3712	ev_run (EV_A_ EVRUN_NOWAIT);
3467	}	3713	}
3468		3714
3469	ev_embed_start (EV_A_ w);	3715	ev_embed_start (EV_A_ w);
3470	}	3716	}
3471		3717
…		…
3563		3809
3564	EV_FREQUENT_CHECK;	3810	EV_FREQUENT_CHECK;
3565	}	3811	}
3566	#endif	3812	#endif
3567		3813
		3814	#if EV_CLEANUP_ENABLE
		3815	void
		3816	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3817	{
		3818	if (expect_false (ev_is_active (w)))
		3819	return;
		3820
		3821	EV_FREQUENT_CHECK;
		3822
		3823	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3824	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3825	cleanups [cleanupcnt - 1] = w;
		3826
		3827	/* cleanup watchers should never keep a refcount on the loop */
		3828	ev_unref (EV_A);
		3829	EV_FREQUENT_CHECK;
		3830	}
		3831
		3832	void
		3833	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3834	{
		3835	clear_pending (EV_A_ (W)w);
		3836	if (expect_false (!ev_is_active (w)))
		3837	return;
		3838
		3839	EV_FREQUENT_CHECK;
		3840	ev_ref (EV_A);
		3841
		3842	{
		3843	int active = ev_active (w);
		3844
		3845	cleanups [active - 1] = cleanups [--cleanupcnt];
		3846	ev_active (cleanups [active - 1]) = active;
		3847	}
		3848
		3849	ev_stop (EV_A_ (W)w);
		3850
		3851	EV_FREQUENT_CHECK;
		3852	}
		3853	#endif
		3854
3568	#if EV_ASYNC_ENABLE	3855	#if EV_ASYNC_ENABLE
3569	void	3856	void
3570	ev_async_start (EV_P_ ev_async *w)	3857	ev_async_start (EV_P_ ev_async *w)
3571	{	3858	{
3572	if (expect_false (ev_is_active (w)))	3859	if (expect_false (ev_is_active (w)))
3573	return;	3860	return;
		3861
		3862	w->sent = 0;
3574		3863
3575	evpipe_init (EV_A);	3864	evpipe_init (EV_A);
3576		3865
3577	EV_FREQUENT_CHECK;	3866	EV_FREQUENT_CHECK;
3578		3867
…		…
3681	}	3970	}
3682		3971
3683	/*****************************************************************************/	3972	/*****************************************************************************/
3684		3973
3685	#if EV_WALK_ENABLE	3974	#if EV_WALK_ENABLE
3686	void	3975	void ecb_cold
3687	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))	3976	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3688	{	3977	{
3689	int i, j;	3978	int i, j;
3690	ev_watcher_list *wl, *wn;	3979	ev_watcher_list *wl, *wn;
3691		3980
…		…
3798		4087
3799	#if EV_MULTIPLICITY	4088	#if EV_MULTIPLICITY
3800	#include "ev_wrap.h"	4089	#include "ev_wrap.h"
3801	#endif	4090	#endif
3802		4091
3803	#ifdef __cplusplus	4092	EV_CPP(})
3804	}
3805	#endif
3806		4093

Diff Legend

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