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Comparing libev/ev.c (file contents):
Revision 1.343 by root, Fri Apr 2 21:03:46 2010 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 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>
…		…
195	# ifndef EV_SELECT_IS_WINSOCKET	198	# ifndef EV_SELECT_IS_WINSOCKET
196	# define EV_SELECT_IS_WINSOCKET 1	199	# define EV_SELECT_IS_WINSOCKET 1
197	# endif	200	# endif
198	# undef EV_AVOID_STDIO	201	# undef EV_AVOID_STDIO
199	#endif	202	#endif
		203
		204	/* OS X, in its infinite idiocy, actually HARDCODES
		205	* a limit of 1024 into their select. Where people have brains,
		206	* OS X engineers apparently have a vacuum. Or maybe they were
		207	* ordered to have a vacuum, or they do anything for money.
		208	* This might help. Or not.
		209	*/
		210	#define _DARWIN_UNLIMITED_SELECT 1
200		211
201	/* this block tries to deduce configuration from header-defined symbols and defaults */	212	/* this block tries to deduce configuration from header-defined symbols and defaults */
202		213
203	/* try to deduce the maximum number of signals on this platform */	214	/* try to deduce the maximum number of signals on this platform */
204	#if defined (EV_NSIG)	215	#if defined (EV_NSIG)
…		…
226	/* to make it compile regardless, just remove the above line, */	237	/* to make it compile regardless, just remove the above line, */
227	/* but consider reporting it, too! :) */	238	/* but consider reporting it, too! :) */
228	# define EV_NSIG 65	239	# define EV_NSIG 65
229	#endif	240	#endif
230		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
231	#ifndef EV_USE_CLOCK_SYSCALL	246	#ifndef EV_USE_CLOCK_SYSCALL
232	# if __linux && __GLIBC__ >= 2	247	# if __linux && __GLIBC__ >= 2
233	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS	248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
234	# else	249	# else
235	# define EV_USE_CLOCK_SYSCALL 0	250	# define EV_USE_CLOCK_SYSCALL 0
…		…
370	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
371	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
372	#endif	387	#endif
373		388
374	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
375	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
376	# include <sys/select.h>	392	# include <sys/select.h>
377	# endif	393	# endif
378	#endif	394	#endif
379		395
380	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
381	# include <sys/utsname.h>
382	# include <sys/statfs.h>	397	# include <sys/statfs.h>
383	# include <sys/inotify.h>	398	# include <sys/inotify.h>
384	/* 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 */
385	# ifndef IN_DONT_FOLLOW	400	# ifndef IN_DONT_FOLLOW
386	# undef EV_USE_INOTIFY	401	# undef EV_USE_INOTIFY
…		…
403	# define EFD_CLOEXEC O_CLOEXEC	418	# define EFD_CLOEXEC O_CLOEXEC
404	# else	419	# else
405	# define EFD_CLOEXEC 02000000	420	# define EFD_CLOEXEC 02000000
406	# endif	421	# endif
407	# endif	422	# endif
408	# ifdef __cplusplus
409	extern "C" {
410	# endif
411	int (eventfd) (unsigned int initval, int flags);	423	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
412	# ifdef __cplusplus
413	}
414	# endif
415	#endif	424	#endif
416		425
417	#if EV_USE_SIGNALFD	426	#if EV_USE_SIGNALFD
418	/* 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 */
419	# include <stdint.h>	428	# include <stdint.h>
…		…
425	# define SFD_CLOEXEC O_CLOEXEC	434	# define SFD_CLOEXEC O_CLOEXEC
426	# else	435	# else
427	# define SFD_CLOEXEC 02000000	436	# define SFD_CLOEXEC 02000000
428	# endif	437	# endif
429	# endif	438	# endif
430	# ifdef __cplusplus
431	extern "C" {
432	# endif
433	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);
434		440
435	struct signalfd_siginfo	441	struct signalfd_siginfo
436	{	442	{
437	uint32_t ssi_signo;	443	uint32_t ssi_signo;
438	char pad[128 - sizeof (uint32_t)];	444	char pad[128 - sizeof (uint32_t)];
439	};	445	};
440	# ifdef __cplusplus
441	}
442	# endif	446	#endif
443	#endif
444
445		447
446	/**/	448	/**/
447		449
448	#if EV_VERIFY >= 3	450	#if EV_VERIFY >= 3
449	# define EV_FREQUENT_CHECK ev_verify (EV_A)	451	# define EV_FREQUENT_CHECK ev_verify (EV_A)
450	#else	452	#else
451	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
452	#endif	454	#endif
453		455
454	/*	456	/*
455	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
456	* It is added to ev_rt_now when scheduling periodics
457	* to ensure progress, time-wise, even when rounding
458	* errors are against us.
459	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
460	* Better solutions welcome.
461	*/	459	*/
462	#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 */
463		462
464	#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) */
465	#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) */
466		465
467	#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)
468	# 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)
469	# 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
470	#else	493	#else
471	# define expect(expr,value) (expr)	494	#define ecb_inline static
472	# define noinline
473	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
474	# define inline
475	# 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
476	#endif	508	#endif
		509	#endif
477		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 && 0 /* TODO: only true when using volatiles */
		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)
		521	#include <WinNT.h>
		522	#define ECB_MEMORY_FENCE MemoryBarrier ()
		523	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		524	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		525	#endif
		526	#endif
		527
		528	#ifndef ECB_MEMORY_FENCE
		529	#include <pthread.h>
		530
		531	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		532	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		533	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		534	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		535	#endif
		536
		537	#if ECB_GCC_VERSION(3,1)
		538	#define ecb_attribute(attrlist) __attribute__(attrlist)
		539	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		540	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		541	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		542	#else
		543	#define ecb_attribute(attrlist)
		544	#define ecb_is_constant(expr) 0
		545	#define ecb_expect(expr,value) (expr)
		546	#define ecb_prefetch(addr,rw,locality)
		547	#endif
		548
		549	#define ecb_noinline ecb_attribute ((__noinline__))
		550	#define ecb_noreturn ecb_attribute ((__noreturn__))
		551	#define ecb_unused ecb_attribute ((__unused__))
		552	#define ecb_const ecb_attribute ((__const__))
		553	#define ecb_pure ecb_attribute ((__pure__))
		554
		555	#if ECB_GCC_VERSION(4,3)
		556	#define ecb_artificial ecb_attribute ((__artificial__))
		557	#define ecb_hot ecb_attribute ((__hot__))
		558	#define ecb_cold ecb_attribute ((__cold__))
		559	#else
		560	#define ecb_artificial
		561	#define ecb_hot
		562	#define ecb_cold
		563	#endif
		564
		565	/* put around conditional expressions if you are very sure that the */
		566	/* expression is mostly true or mostly false. note that these return */
		567	/* booleans, not the expression. */
478	#define expect_false(expr) expect ((expr) != 0, 0)	568	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
479	#define expect_true(expr) expect ((expr) != 0, 1)	569	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		570	/* ecb.h end */
		571
		572	#define expect_false(cond) ecb_expect_false (cond)
		573	#define expect_true(cond) ecb_expect_true (cond)
		574	#define noinline ecb_noinline
		575
480	#define inline_size static inline	576	#define inline_size ecb_inline
481		577
482	#if EV_FEATURE_CODE	578	#if EV_FEATURE_CODE
483	# define inline_speed static inline	579	# define inline_speed ecb_inline
484	#else	580	#else
485	# define inline_speed static noinline	581	# define inline_speed static noinline
486	#endif	582	#endif
487		583
488	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	584	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
503	#define ev_active(w) ((W)(w))->active	599	#define ev_active(w) ((W)(w))->active
504	#define ev_at(w) ((WT)(w))->at	600	#define ev_at(w) ((WT)(w))->at
505		601
506	#if EV_USE_REALTIME	602	#if EV_USE_REALTIME
507	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	603	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
508	/* giving it a reasonably high chance of working on typical architetcures */	604	/* giving it a reasonably high chance of working on typical architectures */
509	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */	605	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
510	#endif	606	#endif
511		607
512	#if EV_USE_MONOTONIC	608	#if EV_USE_MONOTONIC
513	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	609	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
…		…
527	# include "ev_win32.c"	623	# include "ev_win32.c"
528	#endif	624	#endif
529		625
530	/*****************************************************************************/	626	/*****************************************************************************/
531		627
		628	/* define a suitable floor function (only used by periodics atm) */
		629
		630	#if EV_USE_FLOOR
		631	# include <math.h>
		632	# define ev_floor(v) floor (v)
		633	#else
		634
		635	#include <float.h>
		636
		637	/* a floor() replacement function, should be independent of ev_tstamp type */
		638	static ev_tstamp noinline
		639	ev_floor (ev_tstamp v)
		640	{
		641	/* the choice of shift factor is not terribly important */
		642	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		643	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		644	#else
		645	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		646	#endif
		647
		648	/* argument too large for an unsigned long? */
		649	if (expect_false (v >= shift))
		650	{
		651	ev_tstamp f;
		652
		653	if (v == v - 1.)
		654	return v; /* very large number */
		655
		656	f = shift * ev_floor (v * (1. / shift));
		657	return f + ev_floor (v - f);
		658	}
		659
		660	/* special treatment for negative args? */
		661	if (expect_false (v < 0.))
		662	{
		663	ev_tstamp f = -ev_floor (-v);
		664
		665	return f - (f == v ? 0 : 1);
		666	}
		667
		668	/* fits into an unsigned long */
		669	return (unsigned long)v;
		670	}
		671
		672	#endif
		673
		674	/*****************************************************************************/
		675
		676	#ifdef __linux
		677	# include <sys/utsname.h>
		678	#endif
		679
		680	static unsigned int noinline ecb_cold
		681	ev_linux_version (void)
		682	{
		683	#ifdef __linux
		684	unsigned int v = 0;
		685	struct utsname buf;
		686	int i;
		687	char *p = buf.release;
		688
		689	if (uname (&buf))
		690	return 0;
		691
		692	for (i = 3+1; --i; )
		693	{
		694	unsigned int c = 0;
		695
		696	for (;;)
		697	{
		698	if (*p >= '0' && *p <= '9')
		699	c = c * 10 + *p++ - '0';
		700	else
		701	{
		702	p += *p == '.';
		703	break;
		704	}
		705	}
		706
		707	v = (v << 8) | c;
		708	}
		709
		710	return v;
		711	#else
		712	return 0;
		713	#endif
		714	}
		715
		716	/*****************************************************************************/
		717
532	#if EV_AVOID_STDIO	718	#if EV_AVOID_STDIO
533	static void noinline	719	static void noinline ecb_cold
534	ev_printerr (const char *msg)	720	ev_printerr (const char *msg)
535	{	721	{
536	write (STDERR_FILENO, msg, strlen (msg));	722	write (STDERR_FILENO, msg, strlen (msg));
537	}	723	}
538	#endif	724	#endif
539		725
540	static void (*syserr_cb)(const char *msg);	726	static void (*syserr_cb)(const char *msg);
541		727
542	void	728	void ecb_cold
543	ev_set_syserr_cb (void (*cb)(const char *msg))	729	ev_set_syserr_cb (void (*cb)(const char *msg))
544	{	730	{
545	syserr_cb = cb;	731	syserr_cb = cb;
546	}	732	}
547		733
548	static void noinline	734	static void noinline ecb_cold
549	ev_syserr (const char *msg)	735	ev_syserr (const char *msg)
550	{	736	{
551	if (!msg)	737	if (!msg)
552	msg = "(libev) system error";	738	msg = "(libev) system error";
553		739
554	if (syserr_cb)	740	if (syserr_cb)
555	syserr_cb (msg);	741	syserr_cb (msg);
556	else	742	else
557	{	743	{
558	#if EV_AVOID_STDIO	744	#if EV_AVOID_STDIO
559	const char *err = strerror (errno);
560
561	ev_printerr (msg);	745	ev_printerr (msg);
562	ev_printerr (": ");	746	ev_printerr (": ");
563	ev_printerr (err);	747	ev_printerr (strerror (errno));
564	ev_printerr ("\n");	748	ev_printerr ("\n");
565	#else	749	#else
566	perror (msg);	750	perror (msg);
567	#endif	751	#endif
568	abort ();	752	abort ();
…		…
588	#endif	772	#endif
589	}	773	}
590		774
591	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	775	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
592		776
593	void	777	void ecb_cold
594	ev_set_allocator (void *(*cb)(void *ptr, long size))	778	ev_set_allocator (void *(*cb)(void *ptr, long size))
595	{	779	{
596	alloc = cb;	780	alloc = cb;
597	}	781	}
598		782
…		…
602	ptr = alloc (ptr, size);	786	ptr = alloc (ptr, size);
603		787
604	if (!ptr && size)	788	if (!ptr && size)
605	{	789	{
606	#if EV_AVOID_STDIO	790	#if EV_AVOID_STDIO
607	ev_printerr ("libev: memory allocation failed, aborting.\n");	791	ev_printerr ("(libev) memory allocation failed, aborting.\n");
608	#else	792	#else
609	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	793	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
610	#endif	794	#endif
611	abort ();	795	abort ();
612	}	796	}
613		797
614	return ptr;	798	return ptr;
…		…
631	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	815	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
632	unsigned char unused;	816	unsigned char unused;
633	#if EV_USE_EPOLL	817	#if EV_USE_EPOLL
634	unsigned int egen; /* generation counter to counter epoll bugs */	818	unsigned int egen; /* generation counter to counter epoll bugs */
635	#endif	819	#endif
636	#if EV_SELECT_IS_WINSOCKET	820	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
637	SOCKET handle;	821	SOCKET handle;
		822	#endif
		823	#if EV_USE_IOCP
		824	OVERLAPPED or, ow;
638	#endif	825	#endif
639	} ANFD;	826	} ANFD;
640		827
641	/* stores the pending event set for a given watcher */	828	/* stores the pending event set for a given watcher */
642	typedef struct	829	typedef struct
…		…
707	# define EV_RELEASE_CB (void)0	894	# define EV_RELEASE_CB (void)0
708	# define EV_ACQUIRE_CB (void)0	895	# define EV_ACQUIRE_CB (void)0
709	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	896	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
710	#endif	897	#endif
711		898
712	#define EVUNLOOP_RECURSE 0x80	899	#define EVBREAK_RECURSE 0x80
713		900
714	/*****************************************************************************/	901	/*****************************************************************************/
715		902
716	#ifndef EV_HAVE_EV_TIME	903	#ifndef EV_HAVE_EV_TIME
717	ev_tstamp	904	ev_tstamp
…		…
761	if (delay > 0.)	948	if (delay > 0.)
762	{	949	{
763	#if EV_USE_NANOSLEEP	950	#if EV_USE_NANOSLEEP
764	struct timespec ts;	951	struct timespec ts;
765		952
766	ts.tv_sec = (time_t)delay;	953	EV_TS_SET (ts, delay);
767	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
768
769	nanosleep (&ts, 0);	954	nanosleep (&ts, 0);
770	#elif defined(_WIN32)	955	#elif defined(_WIN32)
771	Sleep ((unsigned long)(delay * 1e3));	956	Sleep ((unsigned long)(delay * 1e3));
772	#else	957	#else
773	struct timeval tv;	958	struct timeval tv;
774		959
775	tv.tv_sec = (time_t)delay;
776	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
777
778	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	960	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
779	/* something not guaranteed by newer posix versions, but guaranteed */	961	/* something not guaranteed by newer posix versions, but guaranteed */
780	/* by older ones */	962	/* by older ones */
		963	EV_TV_SET (tv, delay);
781	select (0, 0, 0, 0, &tv);	964	select (0, 0, 0, 0, &tv);
782	#endif	965	#endif
783	}	966	}
784	}	967	}
785		968
786	/*****************************************************************************/	969	/*****************************************************************************/
787		970
788	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	971	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
789		972
790	/* find a suitable new size for the given array, */	973	/* find a suitable new size for the given array, */
791	/* hopefully by rounding to a ncie-to-malloc size */	974	/* hopefully by rounding to a nice-to-malloc size */
792	inline_size int	975	inline_size int
793	array_nextsize (int elem, int cur, int cnt)	976	array_nextsize (int elem, int cur, int cnt)
794	{	977	{
795	int ncur = cur + 1;	978	int ncur = cur + 1;
796		979
…		…
808	}	991	}
809		992
810	return ncur;	993	return ncur;
811	}	994	}
812		995
813	static noinline void *	996	static void * noinline ecb_cold
814	array_realloc (int elem, void *base, int *cur, int cnt)	997	array_realloc (int elem, void *base, int *cur, int cnt)
815	{	998	{
816	*cur = array_nextsize (elem, *cur, cnt);	999	*cur = array_nextsize (elem, *cur, cnt);
817	return ev_realloc (base, elem * *cur);	1000	return ev_realloc (base, elem * *cur);
818	}	1001	}
…		…
821	memset ((void *)(base), 0, sizeof (*(base)) * (count))	1004	memset ((void *)(base), 0, sizeof (*(base)) * (count))
822		1005
823	#define array_needsize(type,base,cur,cnt,init) \	1006	#define array_needsize(type,base,cur,cnt,init) \
824	if (expect_false ((cnt) > (cur))) \	1007	if (expect_false ((cnt) > (cur))) \
825	{ \	1008	{ \
826	int ocur_ = (cur); \	1009	int ecb_unused ocur_ = (cur); \
827	(base) = (type *)array_realloc \	1010	(base) = (type *)array_realloc \
828	(sizeof (type), (base), &(cur), (cnt)); \	1011	(sizeof (type), (base), &(cur), (cnt)); \
829	init ((base) + (ocur_), (cur) - ocur_); \	1012	init ((base) + (ocur_), (cur) - ocur_); \
830	}	1013	}
831		1014
…		…
931	inline_size void	1114	inline_size void
932	fd_reify (EV_P)	1115	fd_reify (EV_P)
933	{	1116	{
934	int i;	1117	int i;
935		1118
		1119	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		1120	for (i = 0; i < fdchangecnt; ++i)
		1121	{
		1122	int fd = fdchanges [i];
		1123	ANFD *anfd = anfds + fd;
		1124
		1125	if (anfd->reify & EV__IOFDSET && anfd->head)
		1126	{
		1127	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1128
		1129	if (handle != anfd->handle)
		1130	{
		1131	unsigned long arg;
		1132
		1133	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1134
		1135	/* handle changed, but fd didn't - we need to do it in two steps */
		1136	backend_modify (EV_A_ fd, anfd->events, 0);
		1137	anfd->events = 0;
		1138	anfd->handle = handle;
		1139	}
		1140	}
		1141	}
		1142	#endif
		1143
936	for (i = 0; i < fdchangecnt; ++i)	1144	for (i = 0; i < fdchangecnt; ++i)
937	{	1145	{
938	int fd = fdchanges [i];	1146	int fd = fdchanges [i];
939	ANFD *anfd = anfds + fd;	1147	ANFD *anfd = anfds + fd;
940	ev_io *w;	1148	ev_io *w;
941		1149
942	unsigned char events = 0;	1150	unsigned char o_events = anfd->events;
		1151	unsigned char o_reify = anfd->reify;
943		1152
944	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1153	anfd->reify = 0;
945	events |= (unsigned char)w->events;
946		1154
947	#if EV_SELECT_IS_WINSOCKET	1155	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
948	if (events)
949	{	1156	{
950	unsigned long arg;	1157	anfd->events = 0;
951	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1158
952	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1159	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		1160	anfd->events |= (unsigned char)w->events;
		1161
		1162	if (o_events != anfd->events)
		1163	o_reify = EV__IOFDSET; /* actually |= */
953	}	1164	}
954	#endif
955		1165
956	{	1166	if (o_reify & EV__IOFDSET)
957	unsigned char o_events = anfd->events;
958	unsigned char o_reify = anfd->reify;
959
960	anfd->reify = 0;
961	anfd->events = events;
962
963	if (o_events != events || o_reify & EV__IOFDSET)
964	backend_modify (EV_A_ fd, o_events, events);	1167	backend_modify (EV_A_ fd, o_events, anfd->events);
965	}
966	}	1168	}
967		1169
968	fdchangecnt = 0;	1170	fdchangecnt = 0;
969	}	1171	}
970		1172
…		…
982	fdchanges [fdchangecnt - 1] = fd;	1184	fdchanges [fdchangecnt - 1] = fd;
983	}	1185	}
984	}	1186	}
985		1187
986	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1188	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
987	inline_speed void	1189	inline_speed void ecb_cold
988	fd_kill (EV_P_ int fd)	1190	fd_kill (EV_P_ int fd)
989	{	1191	{
990	ev_io *w;	1192	ev_io *w;
991		1193
992	while ((w = (ev_io *)anfds [fd].head))	1194	while ((w = (ev_io *)anfds [fd].head))
…		…
995	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1197	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
996	}	1198	}
997	}	1199	}
998		1200
999	/* check whether the given fd is actually valid, for error recovery */	1201	/* check whether the given fd is actually valid, for error recovery */
1000	inline_size int	1202	inline_size int ecb_cold
1001	fd_valid (int fd)	1203	fd_valid (int fd)
1002	{	1204	{
1003	#ifdef _WIN32	1205	#ifdef _WIN32
1004	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1206	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1005	#else	1207	#else
1006	return fcntl (fd, F_GETFD) != -1;	1208	return fcntl (fd, F_GETFD) != -1;
1007	#endif	1209	#endif
1008	}	1210	}
1009		1211
1010	/* called on EBADF to verify fds */	1212	/* called on EBADF to verify fds */
1011	static void noinline	1213	static void noinline ecb_cold
1012	fd_ebadf (EV_P)	1214	fd_ebadf (EV_P)
1013	{	1215	{
1014	int fd;	1216	int fd;
1015		1217
1016	for (fd = 0; fd < anfdmax; ++fd)	1218	for (fd = 0; fd < anfdmax; ++fd)
…		…
1018	if (!fd_valid (fd) && errno == EBADF)	1220	if (!fd_valid (fd) && errno == EBADF)
1019	fd_kill (EV_A_ fd);	1221	fd_kill (EV_A_ fd);
1020	}	1222	}
1021		1223
1022	/* called on ENOMEM in select/poll to kill some fds and retry */	1224	/* called on ENOMEM in select/poll to kill some fds and retry */
1023	static void noinline	1225	static void noinline ecb_cold
1024	fd_enomem (EV_P)	1226	fd_enomem (EV_P)
1025	{	1227	{
1026	int fd;	1228	int fd;
1027		1229
1028	for (fd = anfdmax; fd--; )	1230	for (fd = anfdmax; fd--; )
…		…
1063	}	1265	}
1064		1266
1065	/*****************************************************************************/	1267	/*****************************************************************************/
1066		1268
1067	/*	1269	/*
1068	* the heap functions want a real array index. array index 0 uis guaranteed to not	1270	* the heap functions want a real array index. array index 0 is guaranteed to not
1069	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives	1271	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1070	* the branching factor of the d-tree.	1272	* the branching factor of the d-tree.
1071	*/	1273	*/
1072		1274
1073	/*	1275	/*
…		…
1223		1425
1224	/*****************************************************************************/	1426	/*****************************************************************************/
1225		1427
1226	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE	1428	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1227		1429
1228	static void noinline	1430	static void noinline ecb_cold
1229	evpipe_init (EV_P)	1431	evpipe_init (EV_P)
1230	{	1432	{
1231	if (!ev_is_active (&pipe_w))	1433	if (!ev_is_active (&pipe_w))
1232	{	1434	{
1233	# if EV_USE_EVENTFD	1435	# if EV_USE_EVENTFD
…		…
1255	ev_io_start (EV_A_ &pipe_w);	1457	ev_io_start (EV_A_ &pipe_w);
1256	ev_unref (EV_A); /* watcher should not keep loop alive */	1458	ev_unref (EV_A); /* watcher should not keep loop alive */
1257	}	1459	}
1258	}	1460	}
1259		1461
1260	inline_size void	1462	inline_speed void
1261	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1463	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1262	{	1464	{
1263	if (!*flag)	1465	if (expect_true (*flag))
		1466	return;
		1467
		1468	*flag = 1;
		1469
		1470	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1471
		1472	pipe_write_skipped = 1;
		1473
		1474	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1475
		1476	if (pipe_write_wanted)
1264	{	1477	{
		1478	int old_errno;
		1479
		1480	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1481
1265	int old_errno = errno; /* save errno because write might clobber it */	1482	old_errno = errno; /* save errno because write will clobber it */
1266	char dummy;
1267
1268	*flag = 1;
1269		1483
1270	#if EV_USE_EVENTFD	1484	#if EV_USE_EVENTFD
1271	if (evfd >= 0)	1485	if (evfd >= 0)
1272	{	1486	{
1273	uint64_t counter = 1;	1487	uint64_t counter = 1;
1274	write (evfd, &counter, sizeof (uint64_t));	1488	write (evfd, &counter, sizeof (uint64_t));
1275	}	1489	}
1276	else	1490	else
1277	#endif	1491	#endif
		1492	{
		1493	/* win32 people keep sending patches that change this write() to send() */
		1494	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1495	/* so when you think this write should be a send instead, please find out */
		1496	/* where your send() is from - it's definitely not the microsoft send, and */
		1497	/* tell me. thank you. */
1278	write (evpipe [1], &dummy, 1);	1498	write (evpipe [1], &(evpipe [1]), 1);
		1499	}
1279		1500
1280	errno = old_errno;	1501	errno = old_errno;
1281	}	1502	}
1282	}	1503	}
1283		1504
…		…
1286	static void	1507	static void
1287	pipecb (EV_P_ ev_io *iow, int revents)	1508	pipecb (EV_P_ ev_io *iow, int revents)
1288	{	1509	{
1289	int i;	1510	int i;
1290		1511
		1512	if (revents & EV_READ)
		1513	{
1291	#if EV_USE_EVENTFD	1514	#if EV_USE_EVENTFD
1292	if (evfd >= 0)	1515	if (evfd >= 0)
1293	{	1516	{
1294	uint64_t counter;	1517	uint64_t counter;
1295	read (evfd, &counter, sizeof (uint64_t));	1518	read (evfd, &counter, sizeof (uint64_t));
1296	}	1519	}
1297	else	1520	else
1298	#endif	1521	#endif
1299	{	1522	{
1300	char dummy;	1523	char dummy;
		1524	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1301	read (evpipe [0], &dummy, 1);	1525	read (evpipe [0], &dummy, 1);
		1526	}
1302	}	1527	}
1303		1528
		1529	pipe_write_skipped = 0;
		1530
		1531	#if EV_SIGNAL_ENABLE
1304	if (sig_pending)	1532	if (sig_pending)
1305	{	1533	{
1306	sig_pending = 0;	1534	sig_pending = 0;
1307		1535
1308	for (i = EV_NSIG - 1; i--; )	1536	for (i = EV_NSIG - 1; i--; )
1309	if (expect_false (signals [i].pending))	1537	if (expect_false (signals [i].pending))
1310	ev_feed_signal_event (EV_A_ i + 1);	1538	ev_feed_signal_event (EV_A_ i + 1);
1311	}	1539	}
		1540	#endif
1312		1541
1313	#if EV_ASYNC_ENABLE	1542	#if EV_ASYNC_ENABLE
1314	if (async_pending)	1543	if (async_pending)
1315	{	1544	{
1316	async_pending = 0;	1545	async_pending = 0;
…		…
1325	#endif	1554	#endif
1326	}	1555	}
1327		1556
1328	/*****************************************************************************/	1557	/*****************************************************************************/
1329		1558
		1559	void
		1560	ev_feed_signal (int signum)
		1561	{
		1562	#if EV_MULTIPLICITY
		1563	EV_P = signals [signum - 1].loop;
		1564
		1565	if (!EV_A)
		1566	return;
		1567	#endif
		1568
		1569	if (!ev_active (&pipe_w))
		1570	return;
		1571
		1572	signals [signum - 1].pending = 1;
		1573	evpipe_write (EV_A_ &sig_pending);
		1574	}
		1575
1330	static void	1576	static void
1331	ev_sighandler (int signum)	1577	ev_sighandler (int signum)
1332	{	1578	{
1333	#if EV_MULTIPLICITY
1334	EV_P = signals [signum - 1].loop;
1335	#endif
1336
1337	#ifdef _WIN32	1579	#ifdef _WIN32
1338	signal (signum, ev_sighandler);	1580	signal (signum, ev_sighandler);
1339	#endif	1581	#endif
1340		1582
1341	signals [signum - 1].pending = 1;	1583	ev_feed_signal (signum);
1342	evpipe_write (EV_A_ &sig_pending);
1343	}	1584	}
1344		1585
1345	void noinline	1586	void noinline
1346	ev_feed_signal_event (EV_P_ int signum)	1587	ev_feed_signal_event (EV_P_ int signum)
1347	{	1588	{
…		…
1447		1688
1448	#endif	1689	#endif
1449		1690
1450	/*****************************************************************************/	1691	/*****************************************************************************/
1451		1692
		1693	#if EV_USE_IOCP
		1694	# include "ev_iocp.c"
		1695	#endif
1452	#if EV_USE_PORT	1696	#if EV_USE_PORT
1453	# include "ev_port.c"	1697	# include "ev_port.c"
1454	#endif	1698	#endif
1455	#if EV_USE_KQUEUE	1699	#if EV_USE_KQUEUE
1456	# include "ev_kqueue.c"	1700	# include "ev_kqueue.c"
…		…
1463	#endif	1707	#endif
1464	#if EV_USE_SELECT	1708	#if EV_USE_SELECT
1465	# include "ev_select.c"	1709	# include "ev_select.c"
1466	#endif	1710	#endif
1467		1711
1468	int	1712	int ecb_cold
1469	ev_version_major (void)	1713	ev_version_major (void)
1470	{	1714	{
1471	return EV_VERSION_MAJOR;	1715	return EV_VERSION_MAJOR;
1472	}	1716	}
1473		1717
1474	int	1718	int ecb_cold
1475	ev_version_minor (void)	1719	ev_version_minor (void)
1476	{	1720	{
1477	return EV_VERSION_MINOR;	1721	return EV_VERSION_MINOR;
1478	}	1722	}
1479		1723
1480	/* return true if we are running with elevated privileges and should ignore env variables */	1724	/* return true if we are running with elevated privileges and should ignore env variables */
1481	int inline_size	1725	int inline_size ecb_cold
1482	enable_secure (void)	1726	enable_secure (void)
1483	{	1727	{
1484	#ifdef _WIN32	1728	#ifdef _WIN32
1485	return 0;	1729	return 0;
1486	#else	1730	#else
1487	return getuid () != geteuid ()	1731	return getuid () != geteuid ()
1488	|| getgid () != getegid ();	1732	|| getgid () != getegid ();
1489	#endif	1733	#endif
1490	}	1734	}
1491		1735
1492	unsigned int	1736	unsigned int ecb_cold
1493	ev_supported_backends (void)	1737	ev_supported_backends (void)
1494	{	1738	{
1495	unsigned int flags = 0;	1739	unsigned int flags = 0;
1496		1740
1497	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	1741	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
…		…
1501	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;	1745	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1502		1746
1503	return flags;	1747	return flags;
1504	}	1748	}
1505		1749
1506	unsigned int	1750	unsigned int ecb_cold
1507	ev_recommended_backends (void)	1751	ev_recommended_backends (void)
1508	{	1752	{
1509	unsigned int flags = ev_supported_backends ();	1753	unsigned int flags = ev_supported_backends ();
1510		1754
1511	#ifndef __NetBSD__	1755	#ifndef __NetBSD__
…		…
1523	#endif	1767	#endif
1524		1768
1525	return flags;	1769	return flags;
1526	}	1770	}
1527		1771
1528	unsigned int	1772	unsigned int ecb_cold
1529	ev_embeddable_backends (void)	1773	ev_embeddable_backends (void)
1530	{	1774	{
1531	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	1775	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1532		1776
1533	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1777	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1534	/* please fix it and tell me how to detect the fix */	1778	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1535	flags &= ~EVBACKEND_EPOLL;	1779	flags &= ~EVBACKEND_EPOLL;
1536		1780
1537	return flags;	1781	return flags;
1538	}	1782	}
1539		1783
1540	unsigned int	1784	unsigned int
…		…
1578	ev_userdata (EV_P)	1822	ev_userdata (EV_P)
1579	{	1823	{
1580	return userdata;	1824	return userdata;
1581	}	1825	}
1582		1826
		1827	void
1583	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1828	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1584	{	1829	{
1585	invoke_cb = invoke_pending_cb;	1830	invoke_cb = invoke_pending_cb;
1586	}	1831	}
1587		1832
		1833	void
1588	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))	1834	ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1589	{	1835	{
1590	release_cb = release;	1836	release_cb = release;
1591	acquire_cb = acquire;	1837	acquire_cb = acquire;
1592	}	1838	}
1593	#endif	1839	#endif
1594		1840
1595	/* initialise a loop structure, must be zero-initialised */	1841	/* initialise a loop structure, must be zero-initialised */
1596	static void noinline	1842	static void noinline ecb_cold
1597	loop_init (EV_P_ unsigned int flags)	1843	loop_init (EV_P_ unsigned int flags)
1598	{	1844	{
1599	if (!backend)	1845	if (!backend)
1600	{	1846	{
		1847	origflags = flags;
		1848
1601	#if EV_USE_REALTIME	1849	#if EV_USE_REALTIME
1602	if (!have_realtime)	1850	if (!have_realtime)
1603	{	1851	{
1604	struct timespec ts;	1852	struct timespec ts;
1605		1853
…		…
1627	if (!(flags & EVFLAG_NOENV)	1875	if (!(flags & EVFLAG_NOENV)
1628	&& !enable_secure ()	1876	&& !enable_secure ()
1629	&& getenv ("LIBEV_FLAGS"))	1877	&& getenv ("LIBEV_FLAGS"))
1630	flags = atoi (getenv ("LIBEV_FLAGS"));	1878	flags = atoi (getenv ("LIBEV_FLAGS"));
1631		1879
1632	ev_rt_now = ev_time ();	1880	ev_rt_now = ev_time ();
1633	mn_now = get_clock ();	1881	mn_now = get_clock ();
1634	now_floor = mn_now;	1882	now_floor = mn_now;
1635	rtmn_diff = ev_rt_now - mn_now;	1883	rtmn_diff = ev_rt_now - mn_now;
1636	#if EV_FEATURE_API	1884	#if EV_FEATURE_API
1637	invoke_cb = ev_invoke_pending;	1885	invoke_cb = ev_invoke_pending;
1638	#endif	1886	#endif
1639		1887
1640	io_blocktime = 0.;	1888	io_blocktime = 0.;
1641	timeout_blocktime = 0.;	1889	timeout_blocktime = 0.;
1642	backend = 0;	1890	backend = 0;
1643	backend_fd = -1;	1891	backend_fd = -1;
1644	sig_pending = 0;	1892	sig_pending = 0;
1645	#if EV_ASYNC_ENABLE	1893	#if EV_ASYNC_ENABLE
1646	async_pending = 0;	1894	async_pending = 0;
1647	#endif	1895	#endif
		1896	pipe_write_skipped = 0;
		1897	pipe_write_wanted = 0;
1648	#if EV_USE_INOTIFY	1898	#if EV_USE_INOTIFY
1649	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1899	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1650	#endif	1900	#endif
1651	#if EV_USE_SIGNALFD	1901	#if EV_USE_SIGNALFD
1652	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1902	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1653	#endif	1903	#endif
1654		1904
1655	if (!(flags & 0x0000ffffU))	1905	if (!(flags & EVBACKEND_MASK))
1656	flags |= ev_recommended_backends ();	1906	flags |= ev_recommended_backends ();
1657		1907
		1908	#if EV_USE_IOCP
		1909	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1910	#endif
1658	#if EV_USE_PORT	1911	#if EV_USE_PORT
1659	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1912	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1660	#endif	1913	#endif
1661	#if EV_USE_KQUEUE	1914	#if EV_USE_KQUEUE
1662	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1915	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1679	#endif	1932	#endif
1680	}	1933	}
1681	}	1934	}
1682		1935
1683	/* free up a loop structure */	1936	/* free up a loop structure */
1684	static void noinline	1937	void ecb_cold
1685	loop_destroy (EV_P)	1938	ev_loop_destroy (EV_P)
1686	{	1939	{
1687	int i;	1940	int i;
		1941
		1942	#if EV_MULTIPLICITY
		1943	/* mimic free (0) */
		1944	if (!EV_A)
		1945	return;
		1946	#endif
		1947
		1948	#if EV_CLEANUP_ENABLE
		1949	/* queue cleanup watchers (and execute them) */
		1950	if (expect_false (cleanupcnt))
		1951	{
		1952	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1953	EV_INVOKE_PENDING;
		1954	}
		1955	#endif
		1956
		1957	#if EV_CHILD_ENABLE
		1958	if (ev_is_active (&childev))
		1959	{
		1960	ev_ref (EV_A); /* child watcher */
		1961	ev_signal_stop (EV_A_ &childev);
		1962	}
		1963	#endif
1688		1964
1689	if (ev_is_active (&pipe_w))	1965	if (ev_is_active (&pipe_w))
1690	{	1966	{
1691	/*ev_ref (EV_A);*/	1967	/*ev_ref (EV_A);*/
1692	/*ev_io_stop (EV_A_ &pipe_w);*/	1968	/*ev_io_stop (EV_A_ &pipe_w);*/
…		…
1714	#endif	1990	#endif
1715		1991
1716	if (backend_fd >= 0)	1992	if (backend_fd >= 0)
1717	close (backend_fd);	1993	close (backend_fd);
1718		1994
		1995	#if EV_USE_IOCP
		1996	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1997	#endif
1719	#if EV_USE_PORT	1998	#if EV_USE_PORT
1720	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1999	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1721	#endif	2000	#endif
1722	#if EV_USE_KQUEUE	2001	#if EV_USE_KQUEUE
1723	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	2002	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1750	array_free (periodic, EMPTY);	2029	array_free (periodic, EMPTY);
1751	#endif	2030	#endif
1752	#if EV_FORK_ENABLE	2031	#if EV_FORK_ENABLE
1753	array_free (fork, EMPTY);	2032	array_free (fork, EMPTY);
1754	#endif	2033	#endif
		2034	#if EV_CLEANUP_ENABLE
		2035	array_free (cleanup, EMPTY);
		2036	#endif
1755	array_free (prepare, EMPTY);	2037	array_free (prepare, EMPTY);
1756	array_free (check, EMPTY);	2038	array_free (check, EMPTY);
1757	#if EV_ASYNC_ENABLE	2039	#if EV_ASYNC_ENABLE
1758	array_free (async, EMPTY);	2040	array_free (async, EMPTY);
1759	#endif	2041	#endif
1760		2042
1761	backend = 0;	2043	backend = 0;
		2044
		2045	#if EV_MULTIPLICITY
		2046	if (ev_is_default_loop (EV_A))
		2047	#endif
		2048	ev_default_loop_ptr = 0;
		2049	#if EV_MULTIPLICITY
		2050	else
		2051	ev_free (EV_A);
		2052	#endif
1762	}	2053	}
1763		2054
1764	#if EV_USE_INOTIFY	2055	#if EV_USE_INOTIFY
1765	inline_size void infy_fork (EV_P);	2056	inline_size void infy_fork (EV_P);
1766	#endif	2057	#endif
…		…
1781	infy_fork (EV_A);	2072	infy_fork (EV_A);
1782	#endif	2073	#endif
1783		2074
1784	if (ev_is_active (&pipe_w))	2075	if (ev_is_active (&pipe_w))
1785	{	2076	{
1786	/* this "locks" the handlers against writing to the pipe */	2077	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1787	/* while we modify the fd vars */
1788	sig_pending = 1;
1789	#if EV_ASYNC_ENABLE
1790	async_pending = 1;
1791	#endif
1792		2078
1793	ev_ref (EV_A);	2079	ev_ref (EV_A);
1794	ev_io_stop (EV_A_ &pipe_w);	2080	ev_io_stop (EV_A_ &pipe_w);
1795		2081
1796	#if EV_USE_EVENTFD	2082	#if EV_USE_EVENTFD
…		…
1814	postfork = 0;	2100	postfork = 0;
1815	}	2101	}
1816		2102
1817	#if EV_MULTIPLICITY	2103	#if EV_MULTIPLICITY
1818		2104
1819	struct ev_loop *	2105	struct ev_loop * ecb_cold
1820	ev_loop_new (unsigned int flags)	2106	ev_loop_new (unsigned int flags)
1821	{	2107	{
1822	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2108	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1823		2109
1824	memset (EV_A, 0, sizeof (struct ev_loop));	2110	memset (EV_A, 0, sizeof (struct ev_loop));
1825	loop_init (EV_A_ flags);	2111	loop_init (EV_A_ flags);
1826		2112
1827	if (ev_backend (EV_A))	2113	if (ev_backend (EV_A))
1828	return EV_A;	2114	return EV_A;
1829		2115
		2116	ev_free (EV_A);
1830	return 0;	2117	return 0;
1831	}	2118	}
1832		2119
1833	void
1834	ev_loop_destroy (EV_P)
1835	{
1836	loop_destroy (EV_A);
1837	ev_free (loop);
1838	}
1839
1840	void
1841	ev_loop_fork (EV_P)
1842	{
1843	postfork = 1; /* must be in line with ev_default_fork */
1844	}
1845	#endif /* multiplicity */	2120	#endif /* multiplicity */
1846		2121
1847	#if EV_VERIFY	2122	#if EV_VERIFY
1848	static void noinline	2123	static void noinline ecb_cold
1849	verify_watcher (EV_P_ W w)	2124	verify_watcher (EV_P_ W w)
1850	{	2125	{
1851	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2126	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1852		2127
1853	if (w->pending)	2128	if (w->pending)
1854	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2129	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1855	}	2130	}
1856		2131
1857	static void noinline	2132	static void noinline ecb_cold
1858	verify_heap (EV_P_ ANHE *heap, int N)	2133	verify_heap (EV_P_ ANHE *heap, int N)
1859	{	2134	{
1860	int i;	2135	int i;
1861		2136
1862	for (i = HEAP0; i < N + HEAP0; ++i)	2137	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1867		2142
1868	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2143	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1869	}	2144	}
1870	}	2145	}
1871		2146
1872	static void noinline	2147	static void noinline ecb_cold
1873	array_verify (EV_P_ W *ws, int cnt)	2148	array_verify (EV_P_ W *ws, int cnt)
1874	{	2149	{
1875	while (cnt--)	2150	while (cnt--)
1876	{	2151	{
1877	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2152	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1879	}	2154	}
1880	}	2155	}
1881	#endif	2156	#endif
1882		2157
1883	#if EV_FEATURE_API	2158	#if EV_FEATURE_API
1884	void	2159	void ecb_cold
1885	ev_verify (EV_P)	2160	ev_verify (EV_P)
1886	{	2161	{
1887	#if EV_VERIFY	2162	#if EV_VERIFY
1888	int i;	2163	int i;
1889	WL w;	2164	WL w;
…		…
1924	#if EV_FORK_ENABLE	2199	#if EV_FORK_ENABLE
1925	assert (forkmax >= forkcnt);	2200	assert (forkmax >= forkcnt);
1926	array_verify (EV_A_ (W *)forks, forkcnt);	2201	array_verify (EV_A_ (W *)forks, forkcnt);
1927	#endif	2202	#endif
1928		2203
		2204	#if EV_CLEANUP_ENABLE
		2205	assert (cleanupmax >= cleanupcnt);
		2206	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2207	#endif
		2208
1929	#if EV_ASYNC_ENABLE	2209	#if EV_ASYNC_ENABLE
1930	assert (asyncmax >= asynccnt);	2210	assert (asyncmax >= asynccnt);
1931	array_verify (EV_A_ (W *)asyncs, asynccnt);	2211	array_verify (EV_A_ (W *)asyncs, asynccnt);
1932	#endif	2212	#endif
1933		2213
…		…
1950	#endif	2230	#endif
1951	}	2231	}
1952	#endif	2232	#endif
1953		2233
1954	#if EV_MULTIPLICITY	2234	#if EV_MULTIPLICITY
1955	struct ev_loop *	2235	struct ev_loop * ecb_cold
1956	ev_default_loop_init (unsigned int flags)
1957	#else	2236	#else
1958	int	2237	int
		2238	#endif
1959	ev_default_loop (unsigned int flags)	2239	ev_default_loop (unsigned int flags)
1960	#endif
1961	{	2240	{
1962	if (!ev_default_loop_ptr)	2241	if (!ev_default_loop_ptr)
1963	{	2242	{
1964	#if EV_MULTIPLICITY	2243	#if EV_MULTIPLICITY
1965	EV_P = ev_default_loop_ptr = &default_loop_struct;	2244	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1984		2263
1985	return ev_default_loop_ptr;	2264	return ev_default_loop_ptr;
1986	}	2265	}
1987		2266
1988	void	2267	void
1989	ev_default_destroy (void)	2268	ev_loop_fork (EV_P)
1990	{	2269	{
1991	#if EV_MULTIPLICITY
1992	EV_P = ev_default_loop_ptr;
1993	#endif
1994
1995	ev_default_loop_ptr = 0;
1996
1997	#if EV_CHILD_ENABLE
1998	ev_ref (EV_A); /* child watcher */
1999	ev_signal_stop (EV_A_ &childev);
2000	#endif
2001
2002	loop_destroy (EV_A);
2003	}
2004
2005	void
2006	ev_default_fork (void)
2007	{
2008	#if EV_MULTIPLICITY
2009	EV_P = ev_default_loop_ptr;
2010	#endif
2011
2012	postfork = 1; /* must be in line with ev_loop_fork */	2270	postfork = 1; /* must be in line with ev_default_fork */
2013	}	2271	}
2014		2272
2015	/*****************************************************************************/	2273	/*****************************************************************************/
2016		2274
2017	void	2275	void
…		…
2039		2297
2040	for (pri = NUMPRI; pri--; )	2298	for (pri = NUMPRI; pri--; )
2041	while (pendingcnt [pri])	2299	while (pendingcnt [pri])
2042	{	2300	{
2043	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2301	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2044
2045	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2046	/* ^ this is no longer true, as pending_w could be here */
2047		2302
2048	p->w->pending = 0;	2303	p->w->pending = 0;
2049	EV_CB_INVOKE (p->w, p->events);	2304	EV_CB_INVOKE (p->w, p->events);
2050	EV_FREQUENT_CHECK;	2305	EV_FREQUENT_CHECK;
2051	}	2306	}
…		…
2113	feed_reverse_done (EV_A_ EV_TIMER);	2368	feed_reverse_done (EV_A_ EV_TIMER);
2114	}	2369	}
2115	}	2370	}
2116		2371
2117	#if EV_PERIODIC_ENABLE	2372	#if EV_PERIODIC_ENABLE
		2373
		2374	static void noinline
		2375	periodic_recalc (EV_P_ ev_periodic *w)
		2376	{
		2377	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2378	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2379
		2380	/* the above almost always errs on the low side */
		2381	while (at <= ev_rt_now)
		2382	{
		2383	ev_tstamp nat = at + w->interval;
		2384
		2385	/* when resolution fails us, we use ev_rt_now */
		2386	if (expect_false (nat == at))
		2387	{
		2388	at = ev_rt_now;
		2389	break;
		2390	}
		2391
		2392	at = nat;
		2393	}
		2394
		2395	ev_at (w) = at;
		2396	}
		2397
2118	/* make periodics pending */	2398	/* make periodics pending */
2119	inline_size void	2399	inline_size void
2120	periodics_reify (EV_P)	2400	periodics_reify (EV_P)
2121	{	2401	{
2122	EV_FREQUENT_CHECK;	2402	EV_FREQUENT_CHECK;
…		…
2141	ANHE_at_cache (periodics [HEAP0]);	2421	ANHE_at_cache (periodics [HEAP0]);
2142	downheap (periodics, periodiccnt, HEAP0);	2422	downheap (periodics, periodiccnt, HEAP0);
2143	}	2423	}
2144	else if (w->interval)	2424	else if (w->interval)
2145	{	2425	{
2146	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2426	periodic_recalc (EV_A_ w);
2147	/* if next trigger time is not sufficiently in the future, put it there */
2148	/* this might happen because of floating point inexactness */
2149	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2150	{
2151	ev_at (w) += w->interval;
2152
2153	/* if interval is unreasonably low we might still have a time in the past */
2154	/* so correct this. this will make the periodic very inexact, but the user */
2155	/* has effectively asked to get triggered more often than possible */
2156	if (ev_at (w) < ev_rt_now)
2157	ev_at (w) = ev_rt_now;
2158	}
2159
2160	ANHE_at_cache (periodics [HEAP0]);	2427	ANHE_at_cache (periodics [HEAP0]);
2161	downheap (periodics, periodiccnt, HEAP0);	2428	downheap (periodics, periodiccnt, HEAP0);
2162	}	2429	}
2163	else	2430	else
2164	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2431	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2171	feed_reverse_done (EV_A_ EV_PERIODIC);	2438	feed_reverse_done (EV_A_ EV_PERIODIC);
2172	}	2439	}
2173	}	2440	}
2174		2441
2175	/* simply recalculate all periodics */	2442	/* simply recalculate all periodics */
2176	/* TODO: maybe ensure that at leats one event happens when jumping forward? */	2443	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2177	static void noinline	2444	static void noinline ecb_cold
2178	periodics_reschedule (EV_P)	2445	periodics_reschedule (EV_P)
2179	{	2446	{
2180	int i;	2447	int i;
2181		2448
2182	/* adjust periodics after time jump */	2449	/* adjust periodics after time jump */
…		…
2185	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);	2452	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2186		2453
2187	if (w->reschedule_cb)	2454	if (w->reschedule_cb)
2188	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2455	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2189	else if (w->interval)	2456	else if (w->interval)
2190	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2457	periodic_recalc (EV_A_ w);
2191		2458
2192	ANHE_at_cache (periodics [i]);	2459	ANHE_at_cache (periodics [i]);
2193	}	2460	}
2194		2461
2195	reheap (periodics, periodiccnt);	2462	reheap (periodics, periodiccnt);
2196	}	2463	}
2197	#endif	2464	#endif
2198		2465
2199	/* adjust all timers by a given offset */	2466	/* adjust all timers by a given offset */
2200	static void noinline	2467	static void noinline ecb_cold
2201	timers_reschedule (EV_P_ ev_tstamp adjust)	2468	timers_reschedule (EV_P_ ev_tstamp adjust)
2202	{	2469	{
2203	int i;	2470	int i;
2204		2471
2205	for (i = 0; i < timercnt; ++i)	2472	for (i = 0; i < timercnt; ++i)
…		…
2242	* doesn't hurt either as we only do this on time-jumps or	2509	* doesn't hurt either as we only do this on time-jumps or
2243	* in the unlikely event of having been preempted here.	2510	* in the unlikely event of having been preempted here.
2244	*/	2511	*/
2245	for (i = 4; --i; )	2512	for (i = 4; --i; )
2246	{	2513	{
		2514	ev_tstamp diff;
2247	rtmn_diff = ev_rt_now - mn_now;	2515	rtmn_diff = ev_rt_now - mn_now;
2248		2516
		2517	diff = odiff - rtmn_diff;
		2518
2249	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2519	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2250	return; /* all is well */	2520	return; /* all is well */
2251		2521
2252	ev_rt_now = ev_time ();	2522	ev_rt_now = ev_time ();
2253	mn_now = get_clock ();	2523	mn_now = get_clock ();
2254	now_floor = mn_now;	2524	now_floor = mn_now;
…		…
2277	mn_now = ev_rt_now;	2547	mn_now = ev_rt_now;
2278	}	2548	}
2279	}	2549	}
2280		2550
2281	void	2551	void
2282	ev_loop (EV_P_ int flags)	2552	ev_run (EV_P_ int flags)
2283	{	2553	{
2284	#if EV_FEATURE_API	2554	#if EV_FEATURE_API
2285	++loop_depth;	2555	++loop_depth;
2286	#endif	2556	#endif
2287		2557
2288	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2558	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2289		2559
2290	loop_done = EVUNLOOP_CANCEL;	2560	loop_done = EVBREAK_CANCEL;
2291		2561
2292	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2562	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2293		2563
2294	do	2564	do
2295	{	2565	{
…		…
2338	/* calculate blocking time */	2608	/* calculate blocking time */
2339	{	2609	{
2340	ev_tstamp waittime = 0.;	2610	ev_tstamp waittime = 0.;
2341	ev_tstamp sleeptime = 0.;	2611	ev_tstamp sleeptime = 0.;
2342		2612
		2613	/* remember old timestamp for io_blocktime calculation */
		2614	ev_tstamp prev_mn_now = mn_now;
		2615
		2616	/* update time to cancel out callback processing overhead */
		2617	time_update (EV_A_ 1e100);
		2618
		2619	/* from now on, we want a pipe-wake-up */
		2620	pipe_write_wanted = 1;
		2621
		2622	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2623
2343	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2624	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2344	{	2625	{
2345	/* remember old timestamp for io_blocktime calculation */
2346	ev_tstamp prev_mn_now = mn_now;
2347
2348	/* update time to cancel out callback processing overhead */
2349	time_update (EV_A_ 1e100);
2350
2351	waittime = MAX_BLOCKTIME;	2626	waittime = MAX_BLOCKTIME;
2352		2627
2353	if (timercnt)	2628	if (timercnt)
2354	{	2629	{
2355	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2630	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2356	if (waittime > to) waittime = to;	2631	if (waittime > to) waittime = to;
2357	}	2632	}
2358		2633
2359	#if EV_PERIODIC_ENABLE	2634	#if EV_PERIODIC_ENABLE
2360	if (periodiccnt)	2635	if (periodiccnt)
2361	{	2636	{
2362	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2637	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2363	if (waittime > to) waittime = to;	2638	if (waittime > to) waittime = to;
2364	}	2639	}
2365	#endif	2640	#endif
2366		2641
2367	/* don't let timeouts decrease the waittime below timeout_blocktime */	2642	/* don't let timeouts decrease the waittime below timeout_blocktime */
2368	if (expect_false (waittime < timeout_blocktime))	2643	if (expect_false (waittime < timeout_blocktime))
2369	waittime = timeout_blocktime;	2644	waittime = timeout_blocktime;
		2645
		2646	/* at this point, we NEED to wait, so we have to ensure */
		2647	/* to pass a minimum nonzero value to the backend */
		2648	if (expect_false (waittime < backend_mintime))
		2649	waittime = backend_mintime;
2370		2650
2371	/* extra check because io_blocktime is commonly 0 */	2651	/* extra check because io_blocktime is commonly 0 */
2372	if (expect_false (io_blocktime))	2652	if (expect_false (io_blocktime))
2373	{	2653	{
2374	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2654	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2375		2655
2376	if (sleeptime > waittime - backend_fudge)	2656	if (sleeptime > waittime - backend_mintime)
2377	sleeptime = waittime - backend_fudge;	2657	sleeptime = waittime - backend_mintime;
2378		2658
2379	if (expect_true (sleeptime > 0.))	2659	if (expect_true (sleeptime > 0.))
2380	{	2660	{
2381	ev_sleep (sleeptime);	2661	ev_sleep (sleeptime);
2382	waittime -= sleeptime;	2662	waittime -= sleeptime;
…		…
2385	}	2665	}
2386		2666
2387	#if EV_FEATURE_API	2667	#if EV_FEATURE_API
2388	++loop_count;	2668	++loop_count;
2389	#endif	2669	#endif
2390	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2670	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2391	backend_poll (EV_A_ waittime);	2671	backend_poll (EV_A_ waittime);
2392	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */	2672	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2673
		2674	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2675
		2676	if (pipe_write_skipped)
		2677	{
		2678	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2679	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2680	}
		2681
2393		2682
2394	/* update ev_rt_now, do magic */	2683	/* update ev_rt_now, do magic */
2395	time_update (EV_A_ waittime + sleeptime);	2684	time_update (EV_A_ waittime + sleeptime);
2396	}	2685	}
2397		2686
…		…
2415	EV_INVOKE_PENDING;	2704	EV_INVOKE_PENDING;
2416	}	2705	}
2417	while (expect_true (	2706	while (expect_true (
2418	activecnt	2707	activecnt
2419	&& !loop_done	2708	&& !loop_done
2420	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2709	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2421	));	2710	));
2422		2711
2423	if (loop_done == EVUNLOOP_ONE)	2712	if (loop_done == EVBREAK_ONE)
2424	loop_done = EVUNLOOP_CANCEL;	2713	loop_done = EVBREAK_CANCEL;
2425		2714
2426	#if EV_FEATURE_API	2715	#if EV_FEATURE_API
2427	--loop_depth;	2716	--loop_depth;
2428	#endif	2717	#endif
2429	}	2718	}
2430		2719
2431	void	2720	void
2432	ev_unloop (EV_P_ int how)	2721	ev_break (EV_P_ int how)
2433	{	2722	{
2434	loop_done = how;	2723	loop_done = how;
2435	}	2724	}
2436		2725
2437	void	2726	void
…		…
2585	EV_FREQUENT_CHECK;	2874	EV_FREQUENT_CHECK;
2586		2875
2587	wlist_del (&anfds[w->fd].head, (WL)w);	2876	wlist_del (&anfds[w->fd].head, (WL)w);
2588	ev_stop (EV_A_ (W)w);	2877	ev_stop (EV_A_ (W)w);
2589		2878
2590	fd_change (EV_A_ w->fd, 1);	2879	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2591		2880
2592	EV_FREQUENT_CHECK;	2881	EV_FREQUENT_CHECK;
2593	}	2882	}
2594		2883
2595	void noinline	2884	void noinline
…		…
2687	if (w->reschedule_cb)	2976	if (w->reschedule_cb)
2688	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2977	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2689	else if (w->interval)	2978	else if (w->interval)
2690	{	2979	{
2691	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2980	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2692	/* this formula differs from the one in periodic_reify because we do not always round up */	2981	periodic_recalc (EV_A_ w);
2693	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2694	}	2982	}
2695	else	2983	else
2696	ev_at (w) = w->offset;	2984	ev_at (w) = w->offset;
2697		2985
2698	EV_FREQUENT_CHECK;	2986	EV_FREQUENT_CHECK;
…		…
2819	sa.sa_handler = ev_sighandler;	3107	sa.sa_handler = ev_sighandler;
2820	sigfillset (&sa.sa_mask);	3108	sigfillset (&sa.sa_mask);
2821	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2822	sigaction (w->signum, &sa, 0);	3110	sigaction (w->signum, &sa, 0);
2823		3111
		3112	if (origflags & EVFLAG_NOSIGMASK)
		3113	{
2824	sigemptyset (&sa.sa_mask);	3114	sigemptyset (&sa.sa_mask);
2825	sigaddset (&sa.sa_mask, w->signum);	3115	sigaddset (&sa.sa_mask, w->signum);
2826	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3116	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3117	}
2827	#endif	3118	#endif
2828	}	3119	}
2829		3120
2830	EV_FREQUENT_CHECK;	3121	EV_FREQUENT_CHECK;
2831	}	3122	}
…		…
2972	if (!pend || pend == path)	3263	if (!pend || pend == path)
2973	break;	3264	break;
2974		3265
2975	*pend = 0;	3266	*pend = 0;
2976	w->wd = inotify_add_watch (fs_fd, path, mask);	3267	w->wd = inotify_add_watch (fs_fd, path, mask);
2977	}	3268	}
2978	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3269	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2979	}	3270	}
2980	}	3271	}
2981		3272
2982	if (w->wd >= 0)	3273	if (w->wd >= 0)
…		…
3049	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3340	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3050	ofs += sizeof (struct inotify_event) + ev->len;	3341	ofs += sizeof (struct inotify_event) + ev->len;
3051	}	3342	}
3052	}	3343	}
3053		3344
3054	inline_size unsigned int
3055	ev_linux_version (void)
3056	{
3057	struct utsname buf;
3058	unsigned int v;
3059	int i;
3060	char *p = buf.release;
3061
3062	if (uname (&buf))
3063	return 0;
3064
3065	for (i = 3+1; --i; )
3066	{
3067	unsigned int c = 0;
3068
3069	for (;;)
3070	{
3071	if (*p >= '0' && *p <= '9')
3072	c = c * 10 + *p++ - '0';
3073	else
3074	{
3075	p += *p == '.';
3076	break;
3077	}
3078	}
3079
3080	v = (v << 8) | c;
3081	}
3082
3083	return v;
3084	}
3085
3086	inline_size void	3345	inline_size void ecb_cold
3087	ev_check_2625 (EV_P)	3346	ev_check_2625 (EV_P)
3088	{	3347	{
3089	/* kernels < 2.6.25 are borked	3348	/* kernels < 2.6.25 are borked
3090	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3349	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3091	*/	3350	*/
…		…
3412		3671
3413	#if EV_EMBED_ENABLE	3672	#if EV_EMBED_ENABLE
3414	void noinline	3673	void noinline
3415	ev_embed_sweep (EV_P_ ev_embed *w)	3674	ev_embed_sweep (EV_P_ ev_embed *w)
3416	{	3675	{
3417	ev_loop (w->other, EVLOOP_NONBLOCK);	3676	ev_run (w->other, EVRUN_NOWAIT);
3418	}	3677	}
3419		3678
3420	static void	3679	static void
3421	embed_io_cb (EV_P_ ev_io *io, int revents)	3680	embed_io_cb (EV_P_ ev_io *io, int revents)
3422	{	3681	{
3423	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3682	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3424		3683
3425	if (ev_cb (w))	3684	if (ev_cb (w))
3426	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3685	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3427	else	3686	else
3428	ev_loop (w->other, EVLOOP_NONBLOCK);	3687	ev_run (w->other, EVRUN_NOWAIT);
3429	}	3688	}
3430		3689
3431	static void	3690	static void
3432	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3691	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3433	{	3692	{
…		…
3437	EV_P = w->other;	3696	EV_P = w->other;
3438		3697
3439	while (fdchangecnt)	3698	while (fdchangecnt)
3440	{	3699	{
3441	fd_reify (EV_A);	3700	fd_reify (EV_A);
3442	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3701	ev_run (EV_A_ EVRUN_NOWAIT);
3443	}	3702	}
3444	}	3703	}
3445	}	3704	}
3446		3705
3447	static void	3706	static void
…		…
3453		3712
3454	{	3713	{
3455	EV_P = w->other;	3714	EV_P = w->other;
3456		3715
3457	ev_loop_fork (EV_A);	3716	ev_loop_fork (EV_A);
3458	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3717	ev_run (EV_A_ EVRUN_NOWAIT);
3459	}	3718	}
3460		3719
3461	ev_embed_start (EV_A_ w);	3720	ev_embed_start (EV_A_ w);
3462	}	3721	}
3463		3722
…		…
3555		3814
3556	EV_FREQUENT_CHECK;	3815	EV_FREQUENT_CHECK;
3557	}	3816	}
3558	#endif	3817	#endif
3559		3818
		3819	#if EV_CLEANUP_ENABLE
		3820	void
		3821	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3822	{
		3823	if (expect_false (ev_is_active (w)))
		3824	return;
		3825
		3826	EV_FREQUENT_CHECK;
		3827
		3828	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3829	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3830	cleanups [cleanupcnt - 1] = w;
		3831
		3832	/* cleanup watchers should never keep a refcount on the loop */
		3833	ev_unref (EV_A);
		3834	EV_FREQUENT_CHECK;
		3835	}
		3836
		3837	void
		3838	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3839	{
		3840	clear_pending (EV_A_ (W)w);
		3841	if (expect_false (!ev_is_active (w)))
		3842	return;
		3843
		3844	EV_FREQUENT_CHECK;
		3845	ev_ref (EV_A);
		3846
		3847	{
		3848	int active = ev_active (w);
		3849
		3850	cleanups [active - 1] = cleanups [--cleanupcnt];
		3851	ev_active (cleanups [active - 1]) = active;
		3852	}
		3853
		3854	ev_stop (EV_A_ (W)w);
		3855
		3856	EV_FREQUENT_CHECK;
		3857	}
		3858	#endif
		3859
3560	#if EV_ASYNC_ENABLE	3860	#if EV_ASYNC_ENABLE
3561	void	3861	void
3562	ev_async_start (EV_P_ ev_async *w)	3862	ev_async_start (EV_P_ ev_async *w)
3563	{	3863	{
3564	if (expect_false (ev_is_active (w)))	3864	if (expect_false (ev_is_active (w)))
3565	return;	3865	return;
		3866
		3867	w->sent = 0;
3566		3868
3567	evpipe_init (EV_A);	3869	evpipe_init (EV_A);
3568		3870
3569	EV_FREQUENT_CHECK;	3871	EV_FREQUENT_CHECK;
3570		3872
…		…
3673	}	3975	}
3674		3976
3675	/*****************************************************************************/	3977	/*****************************************************************************/
3676		3978
3677	#if EV_WALK_ENABLE	3979	#if EV_WALK_ENABLE
3678	void	3980	void ecb_cold
3679	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))	3981	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3680	{	3982	{
3681	int i, j;	3983	int i, j;
3682	ev_watcher_list *wl, *wn;	3984	ev_watcher_list *wl, *wn;
3683		3985
…		…
3790		4092
3791	#if EV_MULTIPLICITY	4093	#if EV_MULTIPLICITY
3792	#include "ev_wrap.h"	4094	#include "ev_wrap.h"
3793	#endif	4095	#endif
3794		4096
3795	#ifdef __cplusplus	4097	EV_CPP(})
3796	}
3797	#endif
3798		4098

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