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Comparing libev/ev.c (file contents):
Revision 1.289 by root, Sat Jun 6 11:13:16 2009 UTC vs.
Revision 1.336 by root, Wed Mar 10 08:19:38 2010 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 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010 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	*
…		…
57	# endif	57	# endif
58	# ifndef EV_USE_MONOTONIC	58	# ifndef EV_USE_MONOTONIC
59	# define EV_USE_MONOTONIC 1	59	# define EV_USE_MONOTONIC 1
60	# endif	60	# endif
61	# endif	61	# endif
		62	# elif !defined(EV_USE_CLOCK_SYSCALL)
		63	# define EV_USE_CLOCK_SYSCALL 0
62	# endif	64	# endif
63		65
64	# if HAVE_CLOCK_GETTIME	66	# if HAVE_CLOCK_GETTIME
65	# ifndef EV_USE_MONOTONIC	67	# ifndef EV_USE_MONOTONIC
66	# define EV_USE_MONOTONIC 1	68	# define EV_USE_MONOTONIC 1
…		…
108	# define EV_USE_EPOLL 0	110	# define EV_USE_EPOLL 0
109	# endif	111	# endif
110	# endif	112	# endif
111		113
112	# ifndef EV_USE_KQUEUE	114	# ifndef EV_USE_KQUEUE
113	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
114	# define EV_USE_KQUEUE 1	116	# define EV_USE_KQUEUE 1
115	# else	117	# else
116	# define EV_USE_KQUEUE 0	118	# define EV_USE_KQUEUE 0
117	# endif	119	# endif
118	# endif	120	# endif
…		…
131	# else	133	# else
132	# define EV_USE_INOTIFY 0	134	# define EV_USE_INOTIFY 0
133	# endif	135	# endif
134	# endif	136	# endif
135		137
		138	# ifndef EV_USE_SIGNALFD
		139	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		140	# define EV_USE_SIGNALFD 1
		141	# else
		142	# define EV_USE_SIGNALFD 0
		143	# endif
		144	# endif
		145
136	# ifndef EV_USE_EVENTFD	146	# ifndef EV_USE_EVENTFD
137	# if HAVE_EVENTFD	147	# if HAVE_EVENTFD
138	# define EV_USE_EVENTFD 1	148	# define EV_USE_EVENTFD 1
139	# else	149	# else
140	# define EV_USE_EVENTFD 0	150	# define EV_USE_EVENTFD 0
…		…
143		153
144	#endif	154	#endif
145		155
146	#include <math.h>	156	#include <math.h>
147	#include <stdlib.h>	157	#include <stdlib.h>
		158	#include <string.h>
148	#include <fcntl.h>	159	#include <fcntl.h>
149	#include <stddef.h>	160	#include <stddef.h>
150		161
151	#include <stdio.h>	162	#include <stdio.h>
152		163
153	#include <assert.h>	164	#include <assert.h>
154	#include <errno.h>	165	#include <errno.h>
155	#include <sys/types.h>	166	#include <sys/types.h>
156	#include <time.h>	167	#include <time.h>
		168	#include <limits.h>
157		169
158	#include <signal.h>	170	#include <signal.h>
159		171
160	#ifdef EV_H	172	#ifdef EV_H
161	# include EV_H	173	# include EV_H
…		…
172	# define WIN32_LEAN_AND_MEAN	184	# define WIN32_LEAN_AND_MEAN
173	# include <windows.h>	185	# include <windows.h>
174	# ifndef EV_SELECT_IS_WINSOCKET	186	# ifndef EV_SELECT_IS_WINSOCKET
175	# define EV_SELECT_IS_WINSOCKET 1	187	# define EV_SELECT_IS_WINSOCKET 1
176	# endif	188	# endif
		189	# undef EV_AVOID_STDIO
177	#endif	190	#endif
178		191
179	/* this block tries to deduce configuration from header-defined symbols and defaults */	192	/* this block tries to deduce configuration from header-defined symbols and defaults */
		193
		194	/* try to deduce the maximum number of signals on this platform */
		195	#if defined (EV_NSIG)
		196	/* use what's provided */
		197	#elif defined (NSIG)
		198	# define EV_NSIG (NSIG)
		199	#elif defined(_NSIG)
		200	# define EV_NSIG (_NSIG)
		201	#elif defined (SIGMAX)
		202	# define EV_NSIG (SIGMAX+1)
		203	#elif defined (SIG_MAX)
		204	# define EV_NSIG (SIG_MAX+1)
		205	#elif defined (_SIG_MAX)
		206	# define EV_NSIG (_SIG_MAX+1)
		207	#elif defined (MAXSIG)
		208	# define EV_NSIG (MAXSIG+1)
		209	#elif defined (MAX_SIG)
		210	# define EV_NSIG (MAX_SIG+1)
		211	#elif defined (SIGARRAYSIZE)
		212	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		213	#elif defined (_sys_nsig)
		214	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		215	#else
		216	# error "unable to find value for NSIG, please report"
		217	/* to make it compile regardless, just remove the above line, */
		218	/* but consider reporting it, too! :) */
		219	# define EV_NSIG 65
		220	#endif
180		221
181	#ifndef EV_USE_CLOCK_SYSCALL	222	#ifndef EV_USE_CLOCK_SYSCALL
182	# if __linux && __GLIBC__ >= 2	223	# if __linux && __GLIBC__ >= 2
183	# define EV_USE_CLOCK_SYSCALL 1	224	# define EV_USE_CLOCK_SYSCALL 1
184	# else	225	# else
…		…
264	# else	305	# else
265	# define EV_USE_EVENTFD 0	306	# define EV_USE_EVENTFD 0
266	# endif	307	# endif
267	#endif	308	#endif
268		309
		310	#ifndef EV_USE_SIGNALFD
		311	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		312	# define EV_USE_SIGNALFD 1
		313	# else
		314	# define EV_USE_SIGNALFD 0
		315	# endif
		316	#endif
		317
269	#if 0 /* debugging */	318	#if 0 /* debugging */
270	# define EV_VERIFY 3	319	# define EV_VERIFY 3
271	# define EV_USE_4HEAP 1	320	# define EV_USE_4HEAP 1
272	# define EV_HEAP_CACHE_AT 1	321	# define EV_HEAP_CACHE_AT 1
273	#endif	322	#endif
…		…
282		331
283	#ifndef EV_HEAP_CACHE_AT	332	#ifndef EV_HEAP_CACHE_AT
284	# define EV_HEAP_CACHE_AT !EV_MINIMAL	333	# define EV_HEAP_CACHE_AT !EV_MINIMAL
285	#endif	334	#endif
286		335
		336	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		337	/* which makes programs even slower. might work on other unices, too. */
		338	#if EV_USE_CLOCK_SYSCALL
		339	# include <syscall.h>
		340	# ifdef SYS_clock_gettime
		341	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		342	# undef EV_USE_MONOTONIC
		343	# define EV_USE_MONOTONIC 1
		344	# else
		345	# undef EV_USE_CLOCK_SYSCALL
		346	# define EV_USE_CLOCK_SYSCALL 0
		347	# endif
		348	#endif
		349
287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	350	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		351
		352	#ifdef _AIX
		353	/* AIX has a completely broken poll.h header */
		354	# undef EV_USE_POLL
		355	# define EV_USE_POLL 0
		356	#endif
288		357
289	#ifndef CLOCK_MONOTONIC	358	#ifndef CLOCK_MONOTONIC
290	# undef EV_USE_MONOTONIC	359	# undef EV_USE_MONOTONIC
291	# define EV_USE_MONOTONIC 0	360	# define EV_USE_MONOTONIC 0
292	#endif	361	#endif
…		…
320		389
321	#if EV_SELECT_IS_WINSOCKET	390	#if EV_SELECT_IS_WINSOCKET
322	# include <winsock.h>	391	# include <winsock.h>
323	#endif	392	#endif
324		393
325	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326	/* which makes programs even slower. might work on other unices, too. */
327	#if EV_USE_CLOCK_SYSCALL
328	# include <syscall.h>
329	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330	# undef EV_USE_MONOTONIC
331	# define EV_USE_MONOTONIC 1
332	#endif
333
334	#if EV_USE_EVENTFD	394	#if EV_USE_EVENTFD
335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	395	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336	# include <stdint.h>	396	# include <stdint.h>
		397	# ifndef EFD_NONBLOCK
		398	# define EFD_NONBLOCK O_NONBLOCK
		399	# endif
		400	# ifndef EFD_CLOEXEC
		401	# ifdef O_CLOEXEC
		402	# define EFD_CLOEXEC O_CLOEXEC
		403	# else
		404	# define EFD_CLOEXEC 02000000
		405	# endif
		406	# endif
337	# ifdef __cplusplus	407	# ifdef __cplusplus
338	extern "C" {	408	extern "C" {
339	# endif	409	# endif
340	int eventfd (unsigned int initval, int flags);	410	int (eventfd) (unsigned int initval, int flags);
341	# ifdef __cplusplus	411	# ifdef __cplusplus
342	}	412	}
343	# endif	413	# endif
344	#endif	414	#endif
		415
		416	#if EV_USE_SIGNALFD
		417	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		418	# include <stdint.h>
		419	# ifndef SFD_NONBLOCK
		420	# define SFD_NONBLOCK O_NONBLOCK
		421	# endif
		422	# ifndef SFD_CLOEXEC
		423	# ifdef O_CLOEXEC
		424	# define SFD_CLOEXEC O_CLOEXEC
		425	# else
		426	# define SFD_CLOEXEC 02000000
		427	# endif
		428	# endif
		429	# ifdef __cplusplus
		430	extern "C" {
		431	# endif
		432	int signalfd (int fd, const sigset_t *mask, int flags);
		433
		434	struct signalfd_siginfo
		435	{
		436	uint32_t ssi_signo;
		437	char pad[128 - sizeof (uint32_t)];
		438	};
		439	# ifdef __cplusplus
		440	}
		441	# endif
		442	#endif
		443
345		444
346	/**/	445	/**/
347		446
348	#if EV_VERIFY >= 3	447	#if EV_VERIFY >= 3
349	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	448	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
361	*/	460	*/
362	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	461	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363		462
364	#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) */
365	#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) */
366	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367		465
368	#if __GNUC__ >= 4	466	#if __GNUC__ >= 4
369	# define expect(expr,value) __builtin_expect ((expr),(value))	467	# define expect(expr,value) __builtin_expect ((expr),(value))
370	# define noinline __attribute__ ((noinline))	468	# define noinline __attribute__ ((noinline))
371	#else	469	#else
…		…
384	# define inline_speed static noinline	482	# define inline_speed static noinline
385	#else	483	#else
386	# define inline_speed static inline	484	# define inline_speed static inline
387	#endif	485	#endif
388		486
389	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	487	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		488
		489	#if EV_MINPRI == EV_MAXPRI
		490	# define ABSPRI(w) (((W)w), 0)
		491	#else
390	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	492	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		493	#endif
391		494
392	#define EMPTY /* required for microsofts broken pseudo-c compiler */	495	#define EMPTY /* required for microsofts broken pseudo-c compiler */
393	#define EMPTY2(a,b) /* used to suppress some warnings */	496	#define EMPTY2(a,b) /* used to suppress some warnings */
394		497
395	typedef ev_watcher *W;	498	typedef ev_watcher *W;
…		…
407		510
408	#if EV_USE_MONOTONIC	511	#if EV_USE_MONOTONIC
409	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	512	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410	#endif	513	#endif
411		514
		515	#ifndef EV_FD_TO_WIN32_HANDLE
		516	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		517	#endif
		518	#ifndef EV_WIN32_HANDLE_TO_FD
		519	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		520	#endif
		521	#ifndef EV_WIN32_CLOSE_FD
		522	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		523	#endif
		524
412	#ifdef _WIN32	525	#ifdef _WIN32
413	# include "ev_win32.c"	526	# include "ev_win32.c"
414	#endif	527	#endif
415		528
416	/*****************************************************************************/	529	/*****************************************************************************/
		530
		531	#if EV_AVOID_STDIO
		532	static void noinline
		533	ev_printerr (const char *msg)
		534	{
		535	write (STDERR_FILENO, msg, strlen (msg));
		536	}
		537	#endif
417		538
418	static void (*syserr_cb)(const char *msg);	539	static void (*syserr_cb)(const char *msg);
419		540
420	void	541	void
421	ev_set_syserr_cb (void (*cb)(const char *msg))	542	ev_set_syserr_cb (void (*cb)(const char *msg))
…		…
431		552
432	if (syserr_cb)	553	if (syserr_cb)
433	syserr_cb (msg);	554	syserr_cb (msg);
434	else	555	else
435	{	556	{
		557	#if EV_AVOID_STDIO
		558	const char *err = strerror (errno);
		559
		560	ev_printerr (msg);
		561	ev_printerr (": ");
		562	ev_printerr (err);
		563	ev_printerr ("\n");
		564	#else
436	perror (msg);	565	perror (msg);
		566	#endif
437	abort ();	567	abort ();
438	}	568	}
439	}	569	}
440		570
441	static void *	571	static void *
442	ev_realloc_emul (void *ptr, long size)	572	ev_realloc_emul (void *ptr, long size)
443	{	573	{
		574	#if __GLIBC__
		575	return realloc (ptr, size);
		576	#else
444	/* some systems, notably openbsd and darwin, fail to properly	577	/* some systems, notably openbsd and darwin, fail to properly
445	* implement realloc (x, 0) (as required by both ansi c-98 and	578	* implement realloc (x, 0) (as required by both ansi c-89 and
446	* the single unix specification, so work around them here.	579	* the single unix specification, so work around them here.
447	*/	580	*/
448		581
449	if (size)	582	if (size)
450	return realloc (ptr, size);	583	return realloc (ptr, size);
451		584
452	free (ptr);	585	free (ptr);
453	return 0;	586	return 0;
		587	#endif
454	}	588	}
455		589
456	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	590	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457		591
458	void	592	void
…		…
466	{	600	{
467	ptr = alloc (ptr, size);	601	ptr = alloc (ptr, size);
468		602
469	if (!ptr && size)	603	if (!ptr && size)
470	{	604	{
		605	#if EV_AVOID_STDIO
		606	ev_printerr ("libev: memory allocation failed, aborting.\n");
		607	#else
471	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	608	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		609	#endif
472	abort ();	610	abort ();
473	}	611	}
474		612
475	return ptr;	613	return ptr;
476	}	614	}
…		…
478	#define ev_malloc(size) ev_realloc (0, (size))	616	#define ev_malloc(size) ev_realloc (0, (size))
479	#define ev_free(ptr) ev_realloc ((ptr), 0)	617	#define ev_free(ptr) ev_realloc ((ptr), 0)
480		618
481	/*****************************************************************************/	619	/*****************************************************************************/
482		620
		621	/* set in reify when reification needed */
		622	#define EV_ANFD_REIFY 1
		623
483	/* file descriptor info structure */	624	/* file descriptor info structure */
484	typedef struct	625	typedef struct
485	{	626	{
486	WL head;	627	WL head;
487	unsigned char events; /* the events watched for */	628	unsigned char events; /* the events watched for */
488	unsigned char reify; /* flag set when this ANFD needs reification */	629	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
489	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	630	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
490	unsigned char unused;	631	unsigned char unused;
491	#if EV_USE_EPOLL	632	#if EV_USE_EPOLL
492	unsigned int egen; /* generation counter to counter epoll bugs */	633	unsigned int egen; /* generation counter to counter epoll bugs */
493	#endif	634	#endif
…		…
555		696
556	static int ev_default_loop_ptr;	697	static int ev_default_loop_ptr;
557		698
558	#endif	699	#endif
559		700
		701	#if EV_MINIMAL < 2
		702	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		703	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		704	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		705	#else
		706	# define EV_RELEASE_CB (void)0
		707	# define EV_ACQUIRE_CB (void)0
		708	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		709	#endif
		710
		711	#define EVUNLOOP_RECURSE 0x80
		712
560	/*****************************************************************************/	713	/*****************************************************************************/
561		714
		715	#ifndef EV_HAVE_EV_TIME
562	ev_tstamp	716	ev_tstamp
563	ev_time (void)	717	ev_time (void)
564	{	718	{
565	#if EV_USE_REALTIME	719	#if EV_USE_REALTIME
566	if (expect_true (have_realtime))	720	if (expect_true (have_realtime))
…		…
573		727
574	struct timeval tv;	728	struct timeval tv;
575	gettimeofday (&tv, 0);	729	gettimeofday (&tv, 0);
576	return tv.tv_sec + tv.tv_usec * 1e-6;	730	return tv.tv_sec + tv.tv_usec * 1e-6;
577	}	731	}
		732	#endif
578		733
579	inline_size ev_tstamp	734	inline_size ev_tstamp
580	get_clock (void)	735	get_clock (void)
581	{	736	{
582	#if EV_USE_MONOTONIC	737	#if EV_USE_MONOTONIC
…		…
618		773
619	tv.tv_sec = (time_t)delay;	774	tv.tv_sec = (time_t)delay;
620	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	775	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621		776
622	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	777	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623	/* somehting nto guaranteed by newer posix versions, but guaranteed */	778	/* something not guaranteed by newer posix versions, but guaranteed */
624	/* by older ones */	779	/* by older ones */
625	select (0, 0, 0, 0, &tv);	780	select (0, 0, 0, 0, &tv);
626	#endif	781	#endif
627	}	782	}
628	}	783	}
…		…
736	}	891	}
737		892
738	/*****************************************************************************/	893	/*****************************************************************************/
739		894
740	inline_speed void	895	inline_speed void
741	fd_event (EV_P_ int fd, int revents)	896	fd_event_nc (EV_P_ int fd, int revents)
742	{	897	{
743	ANFD *anfd = anfds + fd;	898	ANFD *anfd = anfds + fd;
744	ev_io *w;	899	ev_io *w;
745		900
746	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	901	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
750	if (ev)	905	if (ev)
751	ev_feed_event (EV_A_ (W)w, ev);	906	ev_feed_event (EV_A_ (W)w, ev);
752	}	907	}
753	}	908	}
754		909
		910	/* do not submit kernel events for fds that have reify set */
		911	/* because that means they changed while we were polling for new events */
		912	inline_speed void
		913	fd_event (EV_P_ int fd, int revents)
		914	{
		915	ANFD *anfd = anfds + fd;
		916
		917	if (expect_true (!anfd->reify))
		918	fd_event_nc (EV_A_ fd, revents);
		919	}
		920
755	void	921	void
756	ev_feed_fd_event (EV_P_ int fd, int revents)	922	ev_feed_fd_event (EV_P_ int fd, int revents)
757	{	923	{
758	if (fd >= 0 && fd < anfdmax)	924	if (fd >= 0 && fd < anfdmax)
759	fd_event (EV_A_ fd, revents);	925	fd_event_nc (EV_A_ fd, revents);
760	}	926	}
761		927
762	/* make sure the external fd watch events are in-sync */	928	/* make sure the external fd watch events are in-sync */
763	/* with the kernel/libev internal state */	929	/* with the kernel/libev internal state */
764	inline_size void	930	inline_size void
…		…
779		945
780	#if EV_SELECT_IS_WINSOCKET	946	#if EV_SELECT_IS_WINSOCKET
781	if (events)	947	if (events)
782	{	948	{
783	unsigned long arg;	949	unsigned long arg;
784	#ifdef EV_FD_TO_WIN32_HANDLE
785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	950	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
786	#else
787	anfd->handle = _get_osfhandle (fd);
788	#endif
789	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	951	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
790	}	952	}
791	#endif	953	#endif
792		954
793	{	955	{
…		…
831	ev_io_stop (EV_A_ w);	993	ev_io_stop (EV_A_ w);
832	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	994	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
833	}	995	}
834	}	996	}
835		997
836	/* check whether the given fd is atcually valid, for error recovery */	998	/* check whether the given fd is actually valid, for error recovery */
837	inline_size int	999	inline_size int
838	fd_valid (int fd)	1000	fd_valid (int fd)
839	{	1001	{
840	#ifdef _WIN32	1002	#ifdef _WIN32
841	return _get_osfhandle (fd) != -1;	1003	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
842	#else	1004	#else
843	return fcntl (fd, F_GETFD) != -1;	1005	return fcntl (fd, F_GETFD) != -1;
844	#endif	1006	#endif
845	}	1007	}
846		1008
…		…
864		1026
865	for (fd = anfdmax; fd--; )	1027	for (fd = anfdmax; fd--; )
866	if (anfds [fd].events)	1028	if (anfds [fd].events)
867	{	1029	{
868	fd_kill (EV_A_ fd);	1030	fd_kill (EV_A_ fd);
869	return;	1031	break;
870	}	1032	}
871	}	1033	}
872		1034
873	/* usually called after fork if backend needs to re-arm all fds from scratch */	1035	/* usually called after fork if backend needs to re-arm all fds from scratch */
874	static void noinline	1036	static void noinline
…		…
879	for (fd = 0; fd < anfdmax; ++fd)	1041	for (fd = 0; fd < anfdmax; ++fd)
880	if (anfds [fd].events)	1042	if (anfds [fd].events)
881	{	1043	{
882	anfds [fd].events = 0;	1044	anfds [fd].events = 0;
883	anfds [fd].emask = 0;	1045	anfds [fd].emask = 0;
884	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1046	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
885	}	1047	}
		1048	}
		1049
		1050	/* used to prepare libev internal fd's */
		1051	/* this is not fork-safe */
		1052	inline_speed void
		1053	fd_intern (int fd)
		1054	{
		1055	#ifdef _WIN32
		1056	unsigned long arg = 1;
		1057	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
		1058	#else
		1059	fcntl (fd, F_SETFD, FD_CLOEXEC);
		1060	fcntl (fd, F_SETFL, O_NONBLOCK);
		1061	#endif
886	}	1062	}
887		1063
888	/*****************************************************************************/	1064	/*****************************************************************************/
889		1065
890	/*	1066	/*
…		…
964		1140
965	for (;;)	1141	for (;;)
966	{	1142	{
967	int c = k << 1;	1143	int c = k << 1;
968		1144
969	if (c > N + HEAP0 - 1)	1145	if (c >= N + HEAP0)
970	break;	1146	break;
971		1147
972	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1148	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
973	? 1 : 0;	1149	? 1 : 0;
974		1150
…		…
1010		1186
1011	/* move an element suitably so it is in a correct place */	1187	/* move an element suitably so it is in a correct place */
1012	inline_size void	1188	inline_size void
1013	adjustheap (ANHE *heap, int N, int k)	1189	adjustheap (ANHE *heap, int N, int k)
1014	{	1190	{
1015	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1191	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1016	upheap (heap, k);	1192	upheap (heap, k);
1017	else	1193	else
1018	downheap (heap, N, k);	1194	downheap (heap, N, k);
1019	}	1195	}
1020		1196
…		…
1033	/*****************************************************************************/	1209	/*****************************************************************************/
1034		1210
1035	/* associate signal watchers to a signal signal */	1211	/* associate signal watchers to a signal signal */
1036	typedef struct	1212	typedef struct
1037	{	1213	{
		1214	EV_ATOMIC_T pending;
		1215	#if EV_MULTIPLICITY
		1216	EV_P;
		1217	#endif
1038	WL head;	1218	WL head;
1039	EV_ATOMIC_T gotsig;
1040	} ANSIG;	1219	} ANSIG;
1041		1220
1042	static ANSIG *signals;	1221	static ANSIG signals [EV_NSIG - 1];
1043	static int signalmax;
1044
1045	static EV_ATOMIC_T gotsig;
1046		1222
1047	/*****************************************************************************/	1223	/*****************************************************************************/
1048		1224
1049	/* used to prepare libev internal fd's */	1225	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1050	/* this is not fork-safe */
1051	inline_speed void
1052	fd_intern (int fd)
1053	{
1054	#ifdef _WIN32
1055	unsigned long arg = 1;
1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1057	#else
1058	fcntl (fd, F_SETFD, FD_CLOEXEC);
1059	fcntl (fd, F_SETFL, O_NONBLOCK);
1060	#endif
1061	}
1062		1226
1063	static void noinline	1227	static void noinline
1064	evpipe_init (EV_P)	1228	evpipe_init (EV_P)
1065	{	1229	{
1066	if (!ev_is_active (&pipe_w))	1230	if (!ev_is_active (&pipe_w))
1067	{	1231	{
1068	#if EV_USE_EVENTFD	1232	# if EV_USE_EVENTFD
		1233	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1234	if (evfd < 0 && errno == EINVAL)
1069	if ((evfd = eventfd (0, 0)) >= 0)	1235	evfd = eventfd (0, 0);
		1236
		1237	if (evfd >= 0)
1070	{	1238	{
1071	evpipe [0] = -1;	1239	evpipe [0] = -1;
1072	fd_intern (evfd);	1240	fd_intern (evfd); /* doing it twice doesn't hurt */
1073	ev_io_set (&pipe_w, evfd, EV_READ);	1241	ev_io_set (&pipe_w, evfd, EV_READ);
1074	}	1242	}
1075	else	1243	else
1076	#endif	1244	# endif
1077	{	1245	{
1078	while (pipe (evpipe))	1246	while (pipe (evpipe))
1079	ev_syserr ("(libev) error creating signal/async pipe");	1247	ev_syserr ("(libev) error creating signal/async pipe");
1080		1248
1081	fd_intern (evpipe [0]);	1249	fd_intern (evpipe [0]);
…		…
1092	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1260	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1093	{	1261	{
1094	if (!*flag)	1262	if (!*flag)
1095	{	1263	{
1096	int old_errno = errno; /* save errno because write might clobber it */	1264	int old_errno = errno; /* save errno because write might clobber it */
		1265	char dummy;
1097		1266
1098	*flag = 1;	1267	*flag = 1;
1099		1268
1100	#if EV_USE_EVENTFD	1269	#if EV_USE_EVENTFD
1101	if (evfd >= 0)	1270	if (evfd >= 0)
…		…
1103	uint64_t counter = 1;	1272	uint64_t counter = 1;
1104	write (evfd, &counter, sizeof (uint64_t));	1273	write (evfd, &counter, sizeof (uint64_t));
1105	}	1274	}
1106	else	1275	else
1107	#endif	1276	#endif
1108	write (evpipe [1], &old_errno, 1);	1277	write (evpipe [1], &dummy, 1);
1109		1278
1110	errno = old_errno;	1279	errno = old_errno;
1111	}	1280	}
1112	}	1281	}
1113		1282
1114	/* called whenever the libev signal pipe */	1283	/* called whenever the libev signal pipe */
1115	/* got some events (signal, async) */	1284	/* got some events (signal, async) */
1116	static void	1285	static void
1117	pipecb (EV_P_ ev_io *iow, int revents)	1286	pipecb (EV_P_ ev_io *iow, int revents)
1118	{	1287	{
		1288	int i;
		1289
1119	#if EV_USE_EVENTFD	1290	#if EV_USE_EVENTFD
1120	if (evfd >= 0)	1291	if (evfd >= 0)
1121	{	1292	{
1122	uint64_t counter;	1293	uint64_t counter;
1123	read (evfd, &counter, sizeof (uint64_t));	1294	read (evfd, &counter, sizeof (uint64_t));
…		…
1127	{	1298	{
1128	char dummy;	1299	char dummy;
1129	read (evpipe [0], &dummy, 1);	1300	read (evpipe [0], &dummy, 1);
1130	}	1301	}
1131		1302
1132	if (gotsig && ev_is_default_loop (EV_A))	1303	if (sig_pending)
1133	{	1304	{
1134	int signum;	1305	sig_pending = 0;
1135	gotsig = 0;
1136		1306
1137	for (signum = signalmax; signum--; )	1307	for (i = EV_NSIG - 1; i--; )
1138	if (signals [signum].gotsig)	1308	if (expect_false (signals [i].pending))
1139	ev_feed_signal_event (EV_A_ signum + 1);	1309	ev_feed_signal_event (EV_A_ i + 1);
1140	}	1310	}
1141		1311
1142	#if EV_ASYNC_ENABLE	1312	#if EV_ASYNC_ENABLE
1143	if (gotasync)	1313	if (async_pending)
1144	{	1314	{
1145	int i;	1315	async_pending = 0;
1146	gotasync = 0;
1147		1316
1148	for (i = asynccnt; i--; )	1317	for (i = asynccnt; i--; )
1149	if (asyncs [i]->sent)	1318	if (asyncs [i]->sent)
1150	{	1319	{
1151	asyncs [i]->sent = 0;	1320	asyncs [i]->sent = 0;
…		…
1159		1328
1160	static void	1329	static void
1161	ev_sighandler (int signum)	1330	ev_sighandler (int signum)
1162	{	1331	{
1163	#if EV_MULTIPLICITY	1332	#if EV_MULTIPLICITY
1164	struct ev_loop *loop = &default_loop_struct;	1333	EV_P = signals [signum - 1].loop;
1165	#endif	1334	#endif
1166		1335
1167	#if _WIN32	1336	#ifdef _WIN32
1168	signal (signum, ev_sighandler);	1337	signal (signum, ev_sighandler);
1169	#endif	1338	#endif
1170		1339
1171	signals [signum - 1].gotsig = 1;	1340	signals [signum - 1].pending = 1;
1172	evpipe_write (EV_A_ &gotsig);	1341	evpipe_write (EV_A_ &sig_pending);
1173	}	1342	}
1174		1343
1175	void noinline	1344	void noinline
1176	ev_feed_signal_event (EV_P_ int signum)	1345	ev_feed_signal_event (EV_P_ int signum)
1177	{	1346	{
1178	WL w;	1347	WL w;
1179		1348
		1349	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1350	return;
		1351
		1352	--signum;
		1353
1180	#if EV_MULTIPLICITY	1354	#if EV_MULTIPLICITY
1181	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1355	/* it is permissible to try to feed a signal to the wrong loop */
1182	#endif	1356	/* or, likely more useful, feeding a signal nobody is waiting for */
1183		1357
1184	--signum;	1358	if (expect_false (signals [signum].loop != EV_A))
1185
1186	if (signum < 0 || signum >= signalmax)
1187	return;	1359	return;
		1360	#endif
1188		1361
1189	signals [signum].gotsig = 0;	1362	signals [signum].pending = 0;
1190		1363
1191	for (w = signals [signum].head; w; w = w->next)	1364	for (w = signals [signum].head; w; w = w->next)
1192	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1365	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1193	}	1366	}
1194		1367
		1368	#if EV_USE_SIGNALFD
		1369	static void
		1370	sigfdcb (EV_P_ ev_io *iow, int revents)
		1371	{
		1372	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1373
		1374	for (;;)
		1375	{
		1376	ssize_t res = read (sigfd, si, sizeof (si));
		1377
		1378	/* not ISO-C, as res might be -1, but works with SuS */
		1379	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1380	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1381
		1382	if (res < (ssize_t)sizeof (si))
		1383	break;
		1384	}
		1385	}
		1386	#endif
		1387
		1388	#endif
		1389
1195	/*****************************************************************************/	1390	/*****************************************************************************/
1196		1391
		1392	#if EV_CHILD_ENABLE
1197	static WL childs [EV_PID_HASHSIZE];	1393	static WL childs [EV_PID_HASHSIZE];
1198
1199	#ifndef _WIN32
1200		1394
1201	static ev_signal childev;	1395	static ev_signal childev;
1202		1396
1203	#ifndef WIFCONTINUED	1397	#ifndef WIFCONTINUED
1204	# define WIFCONTINUED(status) 0	1398	# define WIFCONTINUED(status) 0
…		…
1343	ev_backend (EV_P)	1537	ev_backend (EV_P)
1344	{	1538	{
1345	return backend;	1539	return backend;
1346	}	1540	}
1347		1541
		1542	#if EV_MINIMAL < 2
1348	unsigned int	1543	unsigned int
1349	ev_loop_count (EV_P)	1544	ev_loop_count (EV_P)
1350	{	1545	{
1351	return loop_count;	1546	return loop_count;
1352	}	1547	}
1353		1548
		1549	unsigned int
		1550	ev_loop_depth (EV_P)
		1551	{
		1552	return loop_depth;
		1553	}
		1554
1354	void	1555	void
1355	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1556	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1356	{	1557	{
1357	io_blocktime = interval;	1558	io_blocktime = interval;
1358	}	1559	}
…		…
1360	void	1561	void
1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1562	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1362	{	1563	{
1363	timeout_blocktime = interval;	1564	timeout_blocktime = interval;
1364	}	1565	}
		1566
		1567	void
		1568	ev_set_userdata (EV_P_ void *data)
		1569	{
		1570	userdata = data;
		1571	}
		1572
		1573	void *
		1574	ev_userdata (EV_P)
		1575	{
		1576	return userdata;
		1577	}
		1578
		1579	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1580	{
		1581	invoke_cb = invoke_pending_cb;
		1582	}
		1583
		1584	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1585	{
		1586	release_cb = release;
		1587	acquire_cb = acquire;
		1588	}
		1589	#endif
1365		1590
1366	/* initialise a loop structure, must be zero-initialised */	1591	/* initialise a loop structure, must be zero-initialised */
1367	static void noinline	1592	static void noinline
1368	loop_init (EV_P_ unsigned int flags)	1593	loop_init (EV_P_ unsigned int flags)
1369	{	1594	{
…		…
1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1612	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1388	have_monotonic = 1;	1613	have_monotonic = 1;
1389	}	1614	}
1390	#endif	1615	#endif
1391		1616
		1617	/* pid check not overridable via env */
		1618	#ifndef _WIN32
		1619	if (flags & EVFLAG_FORKCHECK)
		1620	curpid = getpid ();
		1621	#endif
		1622
		1623	if (!(flags & EVFLAG_NOENV)
		1624	&& !enable_secure ()
		1625	&& getenv ("LIBEV_FLAGS"))
		1626	flags = atoi (getenv ("LIBEV_FLAGS"));
		1627
1392	ev_rt_now = ev_time ();	1628	ev_rt_now = ev_time ();
1393	mn_now = get_clock ();	1629	mn_now = get_clock ();
1394	now_floor = mn_now;	1630	now_floor = mn_now;
1395	rtmn_diff = ev_rt_now - mn_now;	1631	rtmn_diff = ev_rt_now - mn_now;
		1632	#if EV_MINIMAL < 2
		1633	invoke_cb = ev_invoke_pending;
		1634	#endif
1396		1635
1397	io_blocktime = 0.;	1636	io_blocktime = 0.;
1398	timeout_blocktime = 0.;	1637	timeout_blocktime = 0.;
1399	backend = 0;	1638	backend = 0;
1400	backend_fd = -1;	1639	backend_fd = -1;
1401	gotasync = 0;	1640	sig_pending = 0;
		1641	#if EV_ASYNC_ENABLE
		1642	async_pending = 0;
		1643	#endif
1402	#if EV_USE_INOTIFY	1644	#if EV_USE_INOTIFY
1403	fs_fd = -2;	1645	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1404	#endif	1646	#endif
1405		1647	#if EV_USE_SIGNALFD
1406	/* pid check not overridable via env */	1648	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1407	#ifndef _WIN32
1408	if (flags & EVFLAG_FORKCHECK)
1409	curpid = getpid ();
1410	#endif	1649	#endif
1411
1412	if (!(flags & EVFLAG_NOENV)
1413	&& !enable_secure ()
1414	&& getenv ("LIBEV_FLAGS"))
1415	flags = atoi (getenv ("LIBEV_FLAGS"));
1416		1650
1417	if (!(flags & 0x0000ffffU))	1651	if (!(flags & 0x0000ffffU))
1418	flags |= ev_recommended_backends ();	1652	flags |= ev_recommended_backends ();
1419		1653
1420	#if EV_USE_PORT	1654	#if EV_USE_PORT
…		…
1433	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1667	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1434	#endif	1668	#endif
1435		1669
1436	ev_prepare_init (&pending_w, pendingcb);	1670	ev_prepare_init (&pending_w, pendingcb);
1437		1671
		1672	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1438	ev_init (&pipe_w, pipecb);	1673	ev_init (&pipe_w, pipecb);
1439	ev_set_priority (&pipe_w, EV_MAXPRI);	1674	ev_set_priority (&pipe_w, EV_MAXPRI);
		1675	#endif
1440	}	1676	}
1441	}	1677	}
1442		1678
1443	/* free up a loop structure */	1679	/* free up a loop structure */
1444	static void noinline	1680	static void noinline
…		…
1446	{	1682	{
1447	int i;	1683	int i;
1448		1684
1449	if (ev_is_active (&pipe_w))	1685	if (ev_is_active (&pipe_w))
1450	{	1686	{
1451	ev_ref (EV_A); /* signal watcher */	1687	/*ev_ref (EV_A);*/
1452	ev_io_stop (EV_A_ &pipe_w);	1688	/*ev_io_stop (EV_A_ &pipe_w);*/
1453		1689
1454	#if EV_USE_EVENTFD	1690	#if EV_USE_EVENTFD
1455	if (evfd >= 0)	1691	if (evfd >= 0)
1456	close (evfd);	1692	close (evfd);
1457	#endif	1693	#endif
1458		1694
1459	if (evpipe [0] >= 0)	1695	if (evpipe [0] >= 0)
1460	{	1696	{
1461	close (evpipe [0]);	1697	EV_WIN32_CLOSE_FD (evpipe [0]);
1462	close (evpipe [1]);	1698	EV_WIN32_CLOSE_FD (evpipe [1]);
1463	}	1699	}
1464	}	1700	}
		1701
		1702	#if EV_USE_SIGNALFD
		1703	if (ev_is_active (&sigfd_w))
		1704	close (sigfd);
		1705	#endif
1465		1706
1466	#if EV_USE_INOTIFY	1707	#if EV_USE_INOTIFY
1467	if (fs_fd >= 0)	1708	if (fs_fd >= 0)
1468	close (fs_fd);	1709	close (fs_fd);
1469	#endif	1710	#endif
…		…
1493	#if EV_IDLE_ENABLE	1734	#if EV_IDLE_ENABLE
1494	array_free (idle, [i]);	1735	array_free (idle, [i]);
1495	#endif	1736	#endif
1496	}	1737	}
1497		1738
1498	ev_free (anfds); anfdmax = 0;	1739	ev_free (anfds); anfds = 0; anfdmax = 0;
1499		1740
1500	/* have to use the microsoft-never-gets-it-right macro */	1741	/* have to use the microsoft-never-gets-it-right macro */
1501	array_free (rfeed, EMPTY);	1742	array_free (rfeed, EMPTY);
1502	array_free (fdchange, EMPTY);	1743	array_free (fdchange, EMPTY);
1503	array_free (timer, EMPTY);	1744	array_free (timer, EMPTY);
…		…
1538		1779
1539	if (ev_is_active (&pipe_w))	1780	if (ev_is_active (&pipe_w))
1540	{	1781	{
1541	/* this "locks" the handlers against writing to the pipe */	1782	/* this "locks" the handlers against writing to the pipe */
1542	/* while we modify the fd vars */	1783	/* while we modify the fd vars */
1543	gotsig = 1;	1784	sig_pending = 1;
1544	#if EV_ASYNC_ENABLE	1785	#if EV_ASYNC_ENABLE
1545	gotasync = 1;	1786	async_pending = 1;
1546	#endif	1787	#endif
1547		1788
1548	ev_ref (EV_A);	1789	ev_ref (EV_A);
1549	ev_io_stop (EV_A_ &pipe_w);	1790	ev_io_stop (EV_A_ &pipe_w);
1550		1791
…		…
1553	close (evfd);	1794	close (evfd);
1554	#endif	1795	#endif
1555		1796
1556	if (evpipe [0] >= 0)	1797	if (evpipe [0] >= 0)
1557	{	1798	{
1558	close (evpipe [0]);	1799	EV_WIN32_CLOSE_FD (evpipe [0]);
1559	close (evpipe [1]);	1800	EV_WIN32_CLOSE_FD (evpipe [1]);
1560	}	1801	}
1561		1802
1562	evpipe_init (EV_A);	1803	evpipe_init (EV_A);
1563	/* now iterate over everything, in case we missed something */	1804	/* now iterate over everything, in case we missed something */
1564	pipecb (EV_A_ &pipe_w, EV_READ);	1805	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1570	#if EV_MULTIPLICITY	1811	#if EV_MULTIPLICITY
1571		1812
1572	struct ev_loop *	1813	struct ev_loop *
1573	ev_loop_new (unsigned int flags)	1814	ev_loop_new (unsigned int flags)
1574	{	1815	{
1575	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1816	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1576		1817
1577	memset (loop, 0, sizeof (struct ev_loop));	1818	memset (EV_A, 0, sizeof (struct ev_loop));
1578
1579	loop_init (EV_A_ flags);	1819	loop_init (EV_A_ flags);
1580		1820
1581	if (ev_backend (EV_A))	1821	if (ev_backend (EV_A))
1582	return loop;	1822	return EV_A;
1583		1823
1584	return 0;	1824	return 0;
1585	}	1825	}
1586		1826
1587	void	1827	void
…		…
1594	void	1834	void
1595	ev_loop_fork (EV_P)	1835	ev_loop_fork (EV_P)
1596	{	1836	{
1597	postfork = 1; /* must be in line with ev_default_fork */	1837	postfork = 1; /* must be in line with ev_default_fork */
1598	}	1838	}
		1839	#endif /* multiplicity */
1599		1840
1600	#if EV_VERIFY	1841	#if EV_VERIFY
1601	static void noinline	1842	static void noinline
1602	verify_watcher (EV_P_ W w)	1843	verify_watcher (EV_P_ W w)
1603	{	1844	{
…		…
1631	verify_watcher (EV_A_ ws [cnt]);	1872	verify_watcher (EV_A_ ws [cnt]);
1632	}	1873	}
1633	}	1874	}
1634	#endif	1875	#endif
1635		1876
		1877	#if EV_MINIMAL < 2
1636	void	1878	void
1637	ev_loop_verify (EV_P)	1879	ev_loop_verify (EV_P)
1638	{	1880	{
1639	#if EV_VERIFY	1881	#if EV_VERIFY
1640	int i;	1882	int i;
…		…
1688		1930
1689	assert (checkmax >= checkcnt);	1931	assert (checkmax >= checkcnt);
1690	array_verify (EV_A_ (W *)checks, checkcnt);	1932	array_verify (EV_A_ (W *)checks, checkcnt);
1691		1933
1692	# if 0	1934	# if 0
		1935	#if EV_CHILD_ENABLE
1693	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1936	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1694	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1937	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1695	# endif	1938	#endif
1696	#endif	1939	# endif
		1940	#endif
1697	}	1941	}
1698		1942	#endif
1699	#endif /* multiplicity */
1700		1943
1701	#if EV_MULTIPLICITY	1944	#if EV_MULTIPLICITY
1702	struct ev_loop *	1945	struct ev_loop *
1703	ev_default_loop_init (unsigned int flags)	1946	ev_default_loop_init (unsigned int flags)
1704	#else	1947	#else
…		…
1707	#endif	1950	#endif
1708	{	1951	{
1709	if (!ev_default_loop_ptr)	1952	if (!ev_default_loop_ptr)
1710	{	1953	{
1711	#if EV_MULTIPLICITY	1954	#if EV_MULTIPLICITY
1712	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1955	EV_P = ev_default_loop_ptr = &default_loop_struct;
1713	#else	1956	#else
1714	ev_default_loop_ptr = 1;	1957	ev_default_loop_ptr = 1;
1715	#endif	1958	#endif
1716		1959
1717	loop_init (EV_A_ flags);	1960	loop_init (EV_A_ flags);
1718		1961
1719	if (ev_backend (EV_A))	1962	if (ev_backend (EV_A))
1720	{	1963	{
1721	#ifndef _WIN32	1964	#if EV_CHILD_ENABLE
1722	ev_signal_init (&childev, childcb, SIGCHLD);	1965	ev_signal_init (&childev, childcb, SIGCHLD);
1723	ev_set_priority (&childev, EV_MAXPRI);	1966	ev_set_priority (&childev, EV_MAXPRI);
1724	ev_signal_start (EV_A_ &childev);	1967	ev_signal_start (EV_A_ &childev);
1725	ev_unref (EV_A); /* child watcher should not keep loop alive */	1968	ev_unref (EV_A); /* child watcher should not keep loop alive */
1726	#endif	1969	#endif
…		…
1734		1977
1735	void	1978	void
1736	ev_default_destroy (void)	1979	ev_default_destroy (void)
1737	{	1980	{
1738	#if EV_MULTIPLICITY	1981	#if EV_MULTIPLICITY
1739	struct ev_loop *loop = ev_default_loop_ptr;	1982	EV_P = ev_default_loop_ptr;
1740	#endif	1983	#endif
1741		1984
1742	ev_default_loop_ptr = 0;	1985	ev_default_loop_ptr = 0;
1743		1986
1744	#ifndef _WIN32	1987	#if EV_CHILD_ENABLE
1745	ev_ref (EV_A); /* child watcher */	1988	ev_ref (EV_A); /* child watcher */
1746	ev_signal_stop (EV_A_ &childev);	1989	ev_signal_stop (EV_A_ &childev);
1747	#endif	1990	#endif
1748		1991
1749	loop_destroy (EV_A);	1992	loop_destroy (EV_A);
…		…
1751		1994
1752	void	1995	void
1753	ev_default_fork (void)	1996	ev_default_fork (void)
1754	{	1997	{
1755	#if EV_MULTIPLICITY	1998	#if EV_MULTIPLICITY
1756	struct ev_loop *loop = ev_default_loop_ptr;	1999	EV_P = ev_default_loop_ptr;
1757	#endif	2000	#endif
1758		2001
1759	postfork = 1; /* must be in line with ev_loop_fork */	2002	postfork = 1; /* must be in line with ev_loop_fork */
1760	}	2003	}
1761		2004
…		…
1765	ev_invoke (EV_P_ void *w, int revents)	2008	ev_invoke (EV_P_ void *w, int revents)
1766	{	2009	{
1767	EV_CB_INVOKE ((W)w, revents);	2010	EV_CB_INVOKE ((W)w, revents);
1768	}	2011	}
1769		2012
1770	inline_speed void	2013	unsigned int
1771	call_pending (EV_P)	2014	ev_pending_count (EV_P)
		2015	{
		2016	int pri;
		2017	unsigned int count = 0;
		2018
		2019	for (pri = NUMPRI; pri--; )
		2020	count += pendingcnt [pri];
		2021
		2022	return count;
		2023	}
		2024
		2025	void noinline
		2026	ev_invoke_pending (EV_P)
1772	{	2027	{
1773	int pri;	2028	int pri;
1774		2029
1775	for (pri = NUMPRI; pri--; )	2030	for (pri = NUMPRI; pri--; )
1776	while (pendingcnt [pri])	2031	while (pendingcnt [pri])
…		…
1944	ANHE_at_cache (*he);	2199	ANHE_at_cache (*he);
1945	}	2200	}
1946	}	2201	}
1947		2202
1948	/* fetch new monotonic and realtime times from the kernel */	2203	/* fetch new monotonic and realtime times from the kernel */
1949	/* also detetc if there was a timejump, and act accordingly */	2204	/* also detect if there was a timejump, and act accordingly */
1950	inline_speed void	2205	inline_speed void
1951	time_update (EV_P_ ev_tstamp max_block)	2206	time_update (EV_P_ ev_tstamp max_block)
1952	{	2207	{
1953	#if EV_USE_MONOTONIC	2208	#if EV_USE_MONOTONIC
1954	if (expect_true (have_monotonic))	2209	if (expect_true (have_monotonic))
…		…
2011		2266
2012	mn_now = ev_rt_now;	2267	mn_now = ev_rt_now;
2013	}	2268	}
2014	}	2269	}
2015		2270
2016	static int loop_done;
2017
2018	void	2271	void
2019	ev_loop (EV_P_ int flags)	2272	ev_loop (EV_P_ int flags)
2020	{	2273	{
		2274	#if EV_MINIMAL < 2
		2275	++loop_depth;
		2276	#endif
		2277
		2278	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2279
2021	loop_done = EVUNLOOP_CANCEL;	2280	loop_done = EVUNLOOP_CANCEL;
2022		2281
2023	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2282	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2024		2283
2025	do	2284	do
2026	{	2285	{
2027	#if EV_VERIFY >= 2	2286	#if EV_VERIFY >= 2
2028	ev_loop_verify (EV_A);	2287	ev_loop_verify (EV_A);
…		…
2041	/* we might have forked, so queue fork handlers */	2300	/* we might have forked, so queue fork handlers */
2042	if (expect_false (postfork))	2301	if (expect_false (postfork))
2043	if (forkcnt)	2302	if (forkcnt)
2044	{	2303	{
2045	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2304	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2046	call_pending (EV_A);	2305	EV_INVOKE_PENDING;
2047	}	2306	}
2048	#endif	2307	#endif
2049		2308
2050	/* queue prepare watchers (and execute them) */	2309	/* queue prepare watchers (and execute them) */
2051	if (expect_false (preparecnt))	2310	if (expect_false (preparecnt))
2052	{	2311	{
2053	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2312	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2054	call_pending (EV_A);	2313	EV_INVOKE_PENDING;
2055	}	2314	}
		2315
		2316	if (expect_false (loop_done))
		2317	break;
2056		2318
2057	/* we might have forked, so reify kernel state if necessary */	2319	/* we might have forked, so reify kernel state if necessary */
2058	if (expect_false (postfork))	2320	if (expect_false (postfork))
2059	loop_fork (EV_A);	2321	loop_fork (EV_A);
2060		2322
…		…
2066	ev_tstamp waittime = 0.;	2328	ev_tstamp waittime = 0.;
2067	ev_tstamp sleeptime = 0.;	2329	ev_tstamp sleeptime = 0.;
2068		2330
2069	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2331	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2070	{	2332	{
		2333	/* remember old timestamp for io_blocktime calculation */
		2334	ev_tstamp prev_mn_now = mn_now;
		2335
2071	/* update time to cancel out callback processing overhead */	2336	/* update time to cancel out callback processing overhead */
2072	time_update (EV_A_ 1e100);	2337	time_update (EV_A_ 1e100);
2073		2338
2074	waittime = MAX_BLOCKTIME;	2339	waittime = MAX_BLOCKTIME;
2075		2340
…		…
2085	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2350	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2086	if (waittime > to) waittime = to;	2351	if (waittime > to) waittime = to;
2087	}	2352	}
2088	#endif	2353	#endif
2089		2354
		2355	/* don't let timeouts decrease the waittime below timeout_blocktime */
2090	if (expect_false (waittime < timeout_blocktime))	2356	if (expect_false (waittime < timeout_blocktime))
2091	waittime = timeout_blocktime;	2357	waittime = timeout_blocktime;
2092		2358
2093	sleeptime = waittime - backend_fudge;	2359	/* extra check because io_blocktime is commonly 0 */
2094
2095	if (expect_true (sleeptime > io_blocktime))	2360	if (expect_false (io_blocktime))
2096	sleeptime = io_blocktime;
2097
2098	if (sleeptime)
2099	{	2361	{
		2362	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2363
		2364	if (sleeptime > waittime - backend_fudge)
		2365	sleeptime = waittime - backend_fudge;
		2366
		2367	if (expect_true (sleeptime > 0.))
		2368	{
2100	ev_sleep (sleeptime);	2369	ev_sleep (sleeptime);
2101	waittime -= sleeptime;	2370	waittime -= sleeptime;
		2371	}
2102	}	2372	}
2103	}	2373	}
2104		2374
		2375	#if EV_MINIMAL < 2
2105	++loop_count;	2376	++loop_count;
		2377	#endif
		2378	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2106	backend_poll (EV_A_ waittime);	2379	backend_poll (EV_A_ waittime);
		2380	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2107		2381
2108	/* update ev_rt_now, do magic */	2382	/* update ev_rt_now, do magic */
2109	time_update (EV_A_ waittime + sleeptime);	2383	time_update (EV_A_ waittime + sleeptime);
2110	}	2384	}
2111		2385
…		…
2122		2396
2123	/* queue check watchers, to be executed first */	2397	/* queue check watchers, to be executed first */
2124	if (expect_false (checkcnt))	2398	if (expect_false (checkcnt))
2125	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2399	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2126		2400
2127	call_pending (EV_A);	2401	EV_INVOKE_PENDING;
2128	}	2402	}
2129	while (expect_true (	2403	while (expect_true (
2130	activecnt	2404	activecnt
2131	&& !loop_done	2405	&& !loop_done
2132	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2406	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2133	));	2407	));
2134		2408
2135	if (loop_done == EVUNLOOP_ONE)	2409	if (loop_done == EVUNLOOP_ONE)
2136	loop_done = EVUNLOOP_CANCEL;	2410	loop_done = EVUNLOOP_CANCEL;
		2411
		2412	#if EV_MINIMAL < 2
		2413	--loop_depth;
		2414	#endif
2137	}	2415	}
2138		2416
2139	void	2417	void
2140	ev_unloop (EV_P_ int how)	2418	ev_unloop (EV_P_ int how)
2141	{	2419	{
…		…
2192	inline_size void	2470	inline_size void
2193	wlist_del (WL *head, WL elem)	2471	wlist_del (WL *head, WL elem)
2194	{	2472	{
2195	while (*head)	2473	while (*head)
2196	{	2474	{
2197	if (*head == elem)	2475	if (expect_true (*head == elem))
2198	{	2476	{
2199	*head = elem->next;	2477	*head = elem->next;
2200	return;	2478	break;
2201	}	2479	}
2202		2480
2203	head = &(*head)->next;	2481	head = &(*head)->next;
2204	}	2482	}
2205	}	2483	}
…		…
2233	}	2511	}
2234		2512
2235	inline_size void	2513	inline_size void
2236	pri_adjust (EV_P_ W w)	2514	pri_adjust (EV_P_ W w)
2237	{	2515	{
2238	int pri = w->priority;	2516	int pri = ev_priority (w);
2239	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2517	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2240	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2518	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2241	w->priority = pri;	2519	ev_set_priority (w, pri);
2242	}	2520	}
2243		2521
2244	inline_speed void	2522	inline_speed void
2245	ev_start (EV_P_ W w, int active)	2523	ev_start (EV_P_ W w, int active)
2246	{	2524	{
…		…
2265		2543
2266	if (expect_false (ev_is_active (w)))	2544	if (expect_false (ev_is_active (w)))
2267	return;	2545	return;
2268		2546
2269	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2547	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2270	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));	2548	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2271		2549
2272	EV_FREQUENT_CHECK;	2550	EV_FREQUENT_CHECK;
2273		2551
2274	ev_start (EV_A_ (W)w, 1);	2552	ev_start (EV_A_ (W)w, 1);
2275	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2553	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2276	wlist_add (&anfds[fd].head, (WL)w);	2554	wlist_add (&anfds[fd].head, (WL)w);
2277		2555
2278	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2556	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2279	w->events &= ~EV__IOFDSET;	2557	w->events &= ~EV__IOFDSET;
2280		2558
2281	EV_FREQUENT_CHECK;	2559	EV_FREQUENT_CHECK;
2282	}	2560	}
2283		2561
…		…
2345	timers [active] = timers [timercnt + HEAP0];	2623	timers [active] = timers [timercnt + HEAP0];
2346	adjustheap (timers, timercnt, active);	2624	adjustheap (timers, timercnt, active);
2347	}	2625	}
2348	}	2626	}
2349		2627
2350	EV_FREQUENT_CHECK;
2351
2352	ev_at (w) -= mn_now;	2628	ev_at (w) -= mn_now;
2353		2629
2354	ev_stop (EV_A_ (W)w);	2630	ev_stop (EV_A_ (W)w);
		2631
		2632	EV_FREQUENT_CHECK;
2355	}	2633	}
2356		2634
2357	void noinline	2635	void noinline
2358	ev_timer_again (EV_P_ ev_timer *w)	2636	ev_timer_again (EV_P_ ev_timer *w)
2359	{	2637	{
…		…
2377	}	2655	}
2378		2656
2379	EV_FREQUENT_CHECK;	2657	EV_FREQUENT_CHECK;
2380	}	2658	}
2381		2659
		2660	ev_tstamp
		2661	ev_timer_remaining (EV_P_ ev_timer *w)
		2662	{
		2663	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2664	}
		2665
2382	#if EV_PERIODIC_ENABLE	2666	#if EV_PERIODIC_ENABLE
2383	void noinline	2667	void noinline
2384	ev_periodic_start (EV_P_ ev_periodic *w)	2668	ev_periodic_start (EV_P_ ev_periodic *w)
2385	{	2669	{
2386	if (expect_false (ev_is_active (w)))	2670	if (expect_false (ev_is_active (w)))
…		…
2432	periodics [active] = periodics [periodiccnt + HEAP0];	2716	periodics [active] = periodics [periodiccnt + HEAP0];
2433	adjustheap (periodics, periodiccnt, active);	2717	adjustheap (periodics, periodiccnt, active);
2434	}	2718	}
2435	}	2719	}
2436		2720
2437	EV_FREQUENT_CHECK;
2438
2439	ev_stop (EV_A_ (W)w);	2721	ev_stop (EV_A_ (W)w);
		2722
		2723	EV_FREQUENT_CHECK;
2440	}	2724	}
2441		2725
2442	void noinline	2726	void noinline
2443	ev_periodic_again (EV_P_ ev_periodic *w)	2727	ev_periodic_again (EV_P_ ev_periodic *w)
2444	{	2728	{
…		…
2450		2734
2451	#ifndef SA_RESTART	2735	#ifndef SA_RESTART
2452	# define SA_RESTART 0	2736	# define SA_RESTART 0
2453	#endif	2737	#endif
2454		2738
		2739	#if EV_SIGNAL_ENABLE
		2740
2455	void noinline	2741	void noinline
2456	ev_signal_start (EV_P_ ev_signal *w)	2742	ev_signal_start (EV_P_ ev_signal *w)
2457	{	2743	{
2458	#if EV_MULTIPLICITY
2459	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2460	#endif
2461	if (expect_false (ev_is_active (w)))	2744	if (expect_false (ev_is_active (w)))
2462	return;	2745	return;
2463		2746
2464	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2747	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2465		2748
2466	evpipe_init (EV_A);	2749	#if EV_MULTIPLICITY
		2750	assert (("libev: a signal must not be attached to two different loops",
		2751	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2467		2752
2468	EV_FREQUENT_CHECK;	2753	signals [w->signum - 1].loop = EV_A;
		2754	#endif
2469		2755
		2756	EV_FREQUENT_CHECK;
		2757
		2758	#if EV_USE_SIGNALFD
		2759	if (sigfd == -2)
2470	{	2760	{
2471	#ifndef _WIN32	2761	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2472	sigset_t full, prev;	2762	if (sigfd < 0 && errno == EINVAL)
2473	sigfillset (&full);	2763	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2474	sigprocmask (SIG_SETMASK, &full, &prev);
2475	#endif
2476		2764
2477	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2765	if (sigfd >= 0)
		2766	{
		2767	fd_intern (sigfd); /* doing it twice will not hurt */
2478		2768
2479	#ifndef _WIN32	2769	sigemptyset (&sigfd_set);
2480	sigprocmask (SIG_SETMASK, &prev, 0);	2770
2481	#endif	2771	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2772	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2773	ev_io_start (EV_A_ &sigfd_w);
		2774	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2775	}
2482	}	2776	}
		2777
		2778	if (sigfd >= 0)
		2779	{
		2780	/* TODO: check .head */
		2781	sigaddset (&sigfd_set, w->signum);
		2782	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2783
		2784	signalfd (sigfd, &sigfd_set, 0);
		2785	}
		2786	#endif
2483		2787
2484	ev_start (EV_A_ (W)w, 1);	2788	ev_start (EV_A_ (W)w, 1);
2485	wlist_add (&signals [w->signum - 1].head, (WL)w);	2789	wlist_add (&signals [w->signum - 1].head, (WL)w);
2486		2790
2487	if (!((WL)w)->next)	2791	if (!((WL)w)->next)
		2792	# if EV_USE_SIGNALFD
		2793	if (sigfd < 0) /*TODO*/
		2794	# endif
2488	{	2795	{
2489	#if _WIN32	2796	# ifdef _WIN32
		2797	evpipe_init (EV_A);
		2798
2490	signal (w->signum, ev_sighandler);	2799	signal (w->signum, ev_sighandler);
2491	#else	2800	# else
2492	struct sigaction sa;	2801	struct sigaction sa;
		2802
		2803	evpipe_init (EV_A);
		2804
2493	sa.sa_handler = ev_sighandler;	2805	sa.sa_handler = ev_sighandler;
2494	sigfillset (&sa.sa_mask);	2806	sigfillset (&sa.sa_mask);
2495	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2807	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2496	sigaction (w->signum, &sa, 0);	2808	sigaction (w->signum, &sa, 0);
		2809
		2810	sigemptyset (&sa.sa_mask);
		2811	sigaddset (&sa.sa_mask, w->signum);
		2812	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2497	#endif	2813	#endif
2498	}	2814	}
2499		2815
2500	EV_FREQUENT_CHECK;	2816	EV_FREQUENT_CHECK;
2501	}	2817	}
2502		2818
2503	void noinline	2819	void noinline
…		…
2511		2827
2512	wlist_del (&signals [w->signum - 1].head, (WL)w);	2828	wlist_del (&signals [w->signum - 1].head, (WL)w);
2513	ev_stop (EV_A_ (W)w);	2829	ev_stop (EV_A_ (W)w);
2514		2830
2515	if (!signals [w->signum - 1].head)	2831	if (!signals [w->signum - 1].head)
		2832	{
		2833	#if EV_MULTIPLICITY
		2834	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2835	#endif
		2836	#if EV_USE_SIGNALFD
		2837	if (sigfd >= 0)
		2838	{
		2839	sigset_t ss;
		2840
		2841	sigemptyset (&ss);
		2842	sigaddset (&ss, w->signum);
		2843	sigdelset (&sigfd_set, w->signum);
		2844
		2845	signalfd (sigfd, &sigfd_set, 0);
		2846	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2847	}
		2848	else
		2849	#endif
2516	signal (w->signum, SIG_DFL);	2850	signal (w->signum, SIG_DFL);
		2851	}
2517		2852
2518	EV_FREQUENT_CHECK;	2853	EV_FREQUENT_CHECK;
2519	}	2854	}
		2855
		2856	#endif
		2857
		2858	#if EV_CHILD_ENABLE
2520		2859
2521	void	2860	void
2522	ev_child_start (EV_P_ ev_child *w)	2861	ev_child_start (EV_P_ ev_child *w)
2523	{	2862	{
2524	#if EV_MULTIPLICITY	2863	#if EV_MULTIPLICITY
…		…
2548	ev_stop (EV_A_ (W)w);	2887	ev_stop (EV_A_ (W)w);
2549		2888
2550	EV_FREQUENT_CHECK;	2889	EV_FREQUENT_CHECK;
2551	}	2890	}
2552		2891
		2892	#endif
		2893
2553	#if EV_STAT_ENABLE	2894	#if EV_STAT_ENABLE
2554		2895
2555	# ifdef _WIN32	2896	# ifdef _WIN32
2556	# undef lstat	2897	# undef lstat
2557	# define lstat(a,b) _stati64 (a,b)	2898	# define lstat(a,b) _stati64 (a,b)
…		…
2562	#define MIN_STAT_INTERVAL 0.1074891	2903	#define MIN_STAT_INTERVAL 0.1074891
2563		2904
2564	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2905	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2565		2906
2566	#if EV_USE_INOTIFY	2907	#if EV_USE_INOTIFY
2567	# define EV_INOTIFY_BUFSIZE 8192	2908
		2909	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2910	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2568		2911
2569	static void noinline	2912	static void noinline
2570	infy_add (EV_P_ ev_stat *w)	2913	infy_add (EV_P_ ev_stat *w)
2571	{	2914	{
2572	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);	2915	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2573		2916
2574	if (w->wd < 0)	2917	if (w->wd >= 0)
		2918	{
		2919	struct statfs sfs;
		2920
		2921	/* now local changes will be tracked by inotify, but remote changes won't */
		2922	/* unless the filesystem is known to be local, we therefore still poll */
		2923	/* also do poll on <2.6.25, but with normal frequency */
		2924
		2925	if (!fs_2625)
		2926	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2927	else if (!statfs (w->path, &sfs)
		2928	&& (sfs.f_type == 0x1373 /* devfs */
		2929	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2930	|| sfs.f_type == 0x3153464a /* jfs */
		2931	|| sfs.f_type == 0x52654973 /* reiser3 */
		2932	|| sfs.f_type == 0x01021994 /* tempfs */
		2933	|| sfs.f_type == 0x58465342 /* xfs */))
		2934	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2935	else
		2936	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2575	{	2937	}
		2938	else
		2939	{
		2940	/* can't use inotify, continue to stat */
2576	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2941	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2577	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2578		2942
2579	/* monitor some parent directory for speedup hints */	2943	/* if path is not there, monitor some parent directory for speedup hints */
2580	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2944	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2581	/* but an efficiency issue only */	2945	/* but an efficiency issue only */
2582	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2946	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2583	{	2947	{
2584	char path [4096];	2948	char path [4096];
…		…
2600	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2964	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2601	}	2965	}
2602	}	2966	}
2603		2967
2604	if (w->wd >= 0)	2968	if (w->wd >= 0)
2605	{
2606	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2969	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2607		2970
2608	/* now local changes will be tracked by inotify, but remote changes won't */	2971	/* now re-arm timer, if required */
2609	/* unless the filesystem it known to be local, we therefore still poll */	2972	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2610	/* also do poll on <2.6.25, but with normal frequency */
2611	struct statfs sfs;
2612
2613	if (fs_2625 && !statfs (w->path, &sfs))
2614	if (sfs.f_type == 0x1373 /* devfs */
2615	|| sfs.f_type == 0xEF53 /* ext2/3 */
2616	|| sfs.f_type == 0x3153464a /* jfs */
2617	|| sfs.f_type == 0x52654973 /* reiser3 */
2618	|| sfs.f_type == 0x01021994 /* tempfs */
2619	|| sfs.f_type == 0x58465342 /* xfs */)
2620	return;
2621
2622	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2623	ev_timer_again (EV_A_ &w->timer);	2973	ev_timer_again (EV_A_ &w->timer);
2624	}	2974	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2625	}	2975	}
2626		2976
2627	static void noinline	2977	static void noinline
2628	infy_del (EV_P_ ev_stat *w)	2978	infy_del (EV_P_ ev_stat *w)
2629	{	2979	{
…		…
2674		3024
2675	static void	3025	static void
2676	infy_cb (EV_P_ ev_io *w, int revents)	3026	infy_cb (EV_P_ ev_io *w, int revents)
2677	{	3027	{
2678	char buf [EV_INOTIFY_BUFSIZE];	3028	char buf [EV_INOTIFY_BUFSIZE];
2679	struct inotify_event *ev = (struct inotify_event *)buf;
2680	int ofs;	3029	int ofs;
2681	int len = read (fs_fd, buf, sizeof (buf));	3030	int len = read (fs_fd, buf, sizeof (buf));
2682		3031
2683	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3032	for (ofs = 0; ofs < len; )
		3033	{
		3034	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2684	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3035	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3036	ofs += sizeof (struct inotify_event) + ev->len;
		3037	}
		3038	}
		3039
		3040	inline_size unsigned int
		3041	ev_linux_version (void)
		3042	{
		3043	struct utsname buf;
		3044	unsigned int v;
		3045	int i;
		3046	char *p = buf.release;
		3047
		3048	if (uname (&buf))
		3049	return 0;
		3050
		3051	for (i = 3+1; --i; )
		3052	{
		3053	unsigned int c = 0;
		3054
		3055	for (;;)
		3056	{
		3057	if (*p >= '0' && *p <= '9')
		3058	c = c * 10 + *p++ - '0';
		3059	else
		3060	{
		3061	p += *p == '.';
		3062	break;
		3063	}
		3064	}
		3065
		3066	v = (v << 8) | c;
		3067	}
		3068
		3069	return v;
2685	}	3070	}
2686		3071
2687	inline_size void	3072	inline_size void
2688	check_2625 (EV_P)	3073	ev_check_2625 (EV_P)
2689	{	3074	{
2690	/* kernels < 2.6.25 are borked	3075	/* kernels < 2.6.25 are borked
2691	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3076	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2692	*/	3077	*/
2693	struct utsname buf;	3078	if (ev_linux_version () < 0x020619)
2694	int major, minor, micro;
2695
2696	if (uname (&buf))
2697	return;	3079	return;
2698		3080
2699	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2700	return;
2701
2702	if (major < 2
2703	|| (major == 2 && minor < 6)
2704	|| (major == 2 && minor == 6 && micro < 25))
2705	return;
2706
2707	fs_2625 = 1;	3081	fs_2625 = 1;
		3082	}
		3083
		3084	inline_size int
		3085	infy_newfd (void)
		3086	{
		3087	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3088	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3089	if (fd >= 0)
		3090	return fd;
		3091	#endif
		3092	return inotify_init ();
2708	}	3093	}
2709		3094
2710	inline_size void	3095	inline_size void
2711	infy_init (EV_P)	3096	infy_init (EV_P)
2712	{	3097	{
2713	if (fs_fd != -2)	3098	if (fs_fd != -2)
2714	return;	3099	return;
2715		3100
2716	fs_fd = -1;	3101	fs_fd = -1;
2717		3102
2718	check_2625 (EV_A);	3103	ev_check_2625 (EV_A);
2719		3104
2720	fs_fd = inotify_init ();	3105	fs_fd = infy_newfd ();
2721		3106
2722	if (fs_fd >= 0)	3107	if (fs_fd >= 0)
2723	{	3108	{
		3109	fd_intern (fs_fd);
2724	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3110	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2725	ev_set_priority (&fs_w, EV_MAXPRI);	3111	ev_set_priority (&fs_w, EV_MAXPRI);
2726	ev_io_start (EV_A_ &fs_w);	3112	ev_io_start (EV_A_ &fs_w);
		3113	ev_unref (EV_A);
2727	}	3114	}
2728	}	3115	}
2729		3116
2730	inline_size void	3117	inline_size void
2731	infy_fork (EV_P)	3118	infy_fork (EV_P)
…		…
2733	int slot;	3120	int slot;
2734		3121
2735	if (fs_fd < 0)	3122	if (fs_fd < 0)
2736	return;	3123	return;
2737		3124
		3125	ev_ref (EV_A);
		3126	ev_io_stop (EV_A_ &fs_w);
2738	close (fs_fd);	3127	close (fs_fd);
2739	fs_fd = inotify_init ();	3128	fs_fd = infy_newfd ();
		3129
		3130	if (fs_fd >= 0)
		3131	{
		3132	fd_intern (fs_fd);
		3133	ev_io_set (&fs_w, fs_fd, EV_READ);
		3134	ev_io_start (EV_A_ &fs_w);
		3135	ev_unref (EV_A);
		3136	}
2740		3137
2741	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3138	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2742	{	3139	{
2743	WL w_ = fs_hash [slot].head;	3140	WL w_ = fs_hash [slot].head;
2744	fs_hash [slot].head = 0;	3141	fs_hash [slot].head = 0;
…		…
2751	w->wd = -1;	3148	w->wd = -1;
2752		3149
2753	if (fs_fd >= 0)	3150	if (fs_fd >= 0)
2754	infy_add (EV_A_ w); /* re-add, no matter what */	3151	infy_add (EV_A_ w); /* re-add, no matter what */
2755	else	3152	else
		3153	{
		3154	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3155	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2756	ev_timer_again (EV_A_ &w->timer);	3156	ev_timer_again (EV_A_ &w->timer);
		3157	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3158	}
2757	}	3159	}
2758	}	3160	}
2759	}	3161	}
2760		3162
2761	#endif	3163	#endif
…		…
2778	static void noinline	3180	static void noinline
2779	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3181	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2780	{	3182	{
2781	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3183	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2782		3184
2783	/* we copy this here each the time so that */	3185	ev_statdata prev = w->attr;
2784	/* prev has the old value when the callback gets invoked */
2785	w->prev = w->attr;
2786	ev_stat_stat (EV_A_ w);	3186	ev_stat_stat (EV_A_ w);
2787		3187
2788	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3188	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2789	if (	3189	if (
2790	w->prev.st_dev != w->attr.st_dev	3190	prev.st_dev != w->attr.st_dev
2791	|| w->prev.st_ino != w->attr.st_ino	3191	|| prev.st_ino != w->attr.st_ino
2792	|| w->prev.st_mode != w->attr.st_mode	3192	|| prev.st_mode != w->attr.st_mode
2793	|| w->prev.st_nlink != w->attr.st_nlink	3193	|| prev.st_nlink != w->attr.st_nlink
2794	|| w->prev.st_uid != w->attr.st_uid	3194	|| prev.st_uid != w->attr.st_uid
2795	|| w->prev.st_gid != w->attr.st_gid	3195	|| prev.st_gid != w->attr.st_gid
2796	|| w->prev.st_rdev != w->attr.st_rdev	3196	|| prev.st_rdev != w->attr.st_rdev
2797	|| w->prev.st_size != w->attr.st_size	3197	|| prev.st_size != w->attr.st_size
2798	|| w->prev.st_atime != w->attr.st_atime	3198	|| prev.st_atime != w->attr.st_atime
2799	|| w->prev.st_mtime != w->attr.st_mtime	3199	|| prev.st_mtime != w->attr.st_mtime
2800	|| w->prev.st_ctime != w->attr.st_ctime	3200	|| prev.st_ctime != w->attr.st_ctime
2801	) {	3201	) {
		3202	/* we only update w->prev on actual differences */
		3203	/* in case we test more often than invoke the callback, */
		3204	/* to ensure that prev is always different to attr */
		3205	w->prev = prev;
		3206
2802	#if EV_USE_INOTIFY	3207	#if EV_USE_INOTIFY
2803	if (fs_fd >= 0)	3208	if (fs_fd >= 0)
2804	{	3209	{
2805	infy_del (EV_A_ w);	3210	infy_del (EV_A_ w);
2806	infy_add (EV_A_ w);	3211	infy_add (EV_A_ w);
…		…
2831		3236
2832	if (fs_fd >= 0)	3237	if (fs_fd >= 0)
2833	infy_add (EV_A_ w);	3238	infy_add (EV_A_ w);
2834	else	3239	else
2835	#endif	3240	#endif
		3241	{
2836	ev_timer_again (EV_A_ &w->timer);	3242	ev_timer_again (EV_A_ &w->timer);
		3243	ev_unref (EV_A);
		3244	}
2837		3245
2838	ev_start (EV_A_ (W)w, 1);	3246	ev_start (EV_A_ (W)w, 1);
2839		3247
2840	EV_FREQUENT_CHECK;	3248	EV_FREQUENT_CHECK;
2841	}	3249	}
…		…
2850	EV_FREQUENT_CHECK;	3258	EV_FREQUENT_CHECK;
2851		3259
2852	#if EV_USE_INOTIFY	3260	#if EV_USE_INOTIFY
2853	infy_del (EV_A_ w);	3261	infy_del (EV_A_ w);
2854	#endif	3262	#endif
		3263
		3264	if (ev_is_active (&w->timer))
		3265	{
		3266	ev_ref (EV_A);
2855	ev_timer_stop (EV_A_ &w->timer);	3267	ev_timer_stop (EV_A_ &w->timer);
		3268	}
2856		3269
2857	ev_stop (EV_A_ (W)w);	3270	ev_stop (EV_A_ (W)w);
2858		3271
2859	EV_FREQUENT_CHECK;	3272	EV_FREQUENT_CHECK;
2860	}	3273	}
…		…
3001	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3414	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3002	{	3415	{
3003	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3416	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3004		3417
3005	{	3418	{
3006	struct ev_loop *loop = w->other;	3419	EV_P = w->other;
3007		3420
3008	while (fdchangecnt)	3421	while (fdchangecnt)
3009	{	3422	{
3010	fd_reify (EV_A);	3423	fd_reify (EV_A);
3011	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3424	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3019	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3432	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3020		3433
3021	ev_embed_stop (EV_A_ w);	3434	ev_embed_stop (EV_A_ w);
3022		3435
3023	{	3436	{
3024	struct ev_loop *loop = w->other;	3437	EV_P = w->other;
3025		3438
3026	ev_loop_fork (EV_A);	3439	ev_loop_fork (EV_A);
3027	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3440	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3028	}	3441	}
3029		3442
…		…
3043	{	3456	{
3044	if (expect_false (ev_is_active (w)))	3457	if (expect_false (ev_is_active (w)))
3045	return;	3458	return;
3046		3459
3047	{	3460	{
3048	struct ev_loop *loop = w->other;	3461	EV_P = w->other;
3049	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3462	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3050	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3463	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3051	}	3464	}
3052		3465
3053	EV_FREQUENT_CHECK;	3466	EV_FREQUENT_CHECK;
…		…
3080		3493
3081	ev_io_stop (EV_A_ &w->io);	3494	ev_io_stop (EV_A_ &w->io);
3082	ev_prepare_stop (EV_A_ &w->prepare);	3495	ev_prepare_stop (EV_A_ &w->prepare);
3083	ev_fork_stop (EV_A_ &w->fork);	3496	ev_fork_stop (EV_A_ &w->fork);
3084		3497
		3498	ev_stop (EV_A_ (W)w);
		3499
3085	EV_FREQUENT_CHECK;	3500	EV_FREQUENT_CHECK;
3086	}	3501	}
3087	#endif	3502	#endif
3088		3503
3089	#if EV_FORK_ENABLE	3504	#if EV_FORK_ENABLE
…		…
3165		3580
3166	void	3581	void
3167	ev_async_send (EV_P_ ev_async *w)	3582	ev_async_send (EV_P_ ev_async *w)
3168	{	3583	{
3169	w->sent = 1;	3584	w->sent = 1;
3170	evpipe_write (EV_A_ &gotasync);	3585	evpipe_write (EV_A_ &async_pending);
3171	}	3586	}
3172	#endif	3587	#endif
3173		3588
3174	/*****************************************************************************/	3589	/*****************************************************************************/
3175		3590
…		…
3324	if (types & EV_CHECK)	3739	if (types & EV_CHECK)
3325	for (i = checkcnt; i--; )	3740	for (i = checkcnt; i--; )
3326	cb (EV_A_ EV_CHECK, checks [i]);	3741	cb (EV_A_ EV_CHECK, checks [i]);
3327		3742
3328	if (types & EV_SIGNAL)	3743	if (types & EV_SIGNAL)
3329	for (i = 0; i < signalmax; ++i)	3744	for (i = 0; i < EV_NSIG - 1; ++i)
3330	for (wl = signals [i].head; wl; )	3745	for (wl = signals [i].head; wl; )
3331	{	3746	{
3332	wn = wl->next;	3747	wn = wl->next;
3333	cb (EV_A_ EV_SIGNAL, wl);	3748	cb (EV_A_ EV_SIGNAL, wl);
3334	wl = wn;	3749	wl = wn;

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