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

Comparing libev/ev.c (file contents):
Revision 1.348 by root, Fri Oct 15 22:48:25 2010 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
10	* 1. Redistributions of source code must retain the above copyright notice,	10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.	11	* this list of conditions and the following disclaimer.
12	*	12	*
13	* 2. Redistributions in binary form must reproduce the above copyright	13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the	14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.	15	* documentation and/or other materials provided with the distribution.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO	19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-	20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,	21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
35	* and other provisions required by the GPL. If you do not delete the	35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under	36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.	37	* either the BSD or the GPL.
38	*/	38	*/
39		39
40	#ifdef __cplusplus
41	extern "C" {
42	#endif
43
44	/* this big block deduces configuration from config.h */	40	/* this big block deduces configuration from config.h */
45	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
46	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
47	# include EV_CONFIG_H	43	# include EV_CONFIG_H
48	# else	44	# else
49	# include "config.h"	45	# include "config.h"
50	# endif	46	# endif
		47
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
51		53
52	# if HAVE_CLOCK_SYSCALL	54	# if HAVE_CLOCK_SYSCALL
53	# ifndef EV_USE_CLOCK_SYSCALL	55	# ifndef EV_USE_CLOCK_SYSCALL
54	# define EV_USE_CLOCK_SYSCALL 1	56	# define EV_USE_CLOCK_SYSCALL 1
55	# ifndef EV_USE_REALTIME	57	# ifndef EV_USE_REALTIME
…		…
160	# define EV_USE_EVENTFD 0	162	# define EV_USE_EVENTFD 0
161	# endif	163	# endif
162		164
163	#endif	165	#endif
164		166
165	#include <math.h>
166	#include <stdlib.h>	167	#include <stdlib.h>
167	#include <string.h>	168	#include <string.h>
168	#include <fcntl.h>	169	#include <fcntl.h>
169	#include <stddef.h>	170	#include <stddef.h>
170		171
…		…
181	#ifdef EV_H	182	#ifdef EV_H
182	# include EV_H	183	# include EV_H
183	#else	184	#else
184	# include "ev.h"	185	# include "ev.h"
185	#endif	186	#endif
		187
		188	EV_CPP(extern "C" {)
186		189
187	#ifndef _WIN32	190	#ifndef _WIN32
188	# include <sys/time.h>	191	# include <sys/time.h>
189	# include <sys/wait.h>	192	# include <sys/wait.h>
190	# include <unistd.h>	193	# include <unistd.h>
…		…
234	/* to make it compile regardless, just remove the above line, */	237	/* to make it compile regardless, just remove the above line, */
235	/* but consider reporting it, too! :) */	238	/* but consider reporting it, too! :) */
236	# define EV_NSIG 65	239	# define EV_NSIG 65
237	#endif	240	#endif
238		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
239	#ifndef EV_USE_CLOCK_SYSCALL	246	#ifndef EV_USE_CLOCK_SYSCALL
240	# if __linux && __GLIBC__ >= 2	247	# if __linux && __GLIBC__ >= 2
241	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS	248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
242	# else	249	# else
243	# define EV_USE_CLOCK_SYSCALL 0	250	# define EV_USE_CLOCK_SYSCALL 0
…		…
378	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
379	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
380	#endif	387	#endif
381		388
382	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
383	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
384	# include <sys/select.h>	392	# include <sys/select.h>
385	# endif	393	# endif
386	#endif	394	#endif
387		395
388	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
389	# include <sys/utsname.h>
390	# include <sys/statfs.h>	397	# include <sys/statfs.h>
391	# include <sys/inotify.h>	398	# include <sys/inotify.h>
392	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	399	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
393	# ifndef IN_DONT_FOLLOW	400	# ifndef IN_DONT_FOLLOW
394	# undef EV_USE_INOTIFY	401	# undef EV_USE_INOTIFY
…		…
411	# define EFD_CLOEXEC O_CLOEXEC	418	# define EFD_CLOEXEC O_CLOEXEC
412	# else	419	# else
413	# define EFD_CLOEXEC 02000000	420	# define EFD_CLOEXEC 02000000
414	# endif	421	# endif
415	# endif	422	# endif
416	# ifdef __cplusplus
417	extern "C" {
418	# endif
419	int (eventfd) (unsigned int initval, int flags);	423	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
420	# ifdef __cplusplus
421	}
422	# endif
423	#endif	424	#endif
424		425
425	#if EV_USE_SIGNALFD	426	#if EV_USE_SIGNALFD
426	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	427	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
427	# include <stdint.h>	428	# include <stdint.h>
…		…
433	# define SFD_CLOEXEC O_CLOEXEC	434	# define SFD_CLOEXEC O_CLOEXEC
434	# else	435	# else
435	# define SFD_CLOEXEC 02000000	436	# define SFD_CLOEXEC 02000000
436	# endif	437	# endif
437	# endif	438	# endif
438	# ifdef __cplusplus
439	extern "C" {
440	# endif
441	int signalfd (int fd, const sigset_t *mask, int flags);	439	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
442		440
443	struct signalfd_siginfo	441	struct signalfd_siginfo
444	{	442	{
445	uint32_t ssi_signo;	443	uint32_t ssi_signo;
446	char pad[128 - sizeof (uint32_t)];	444	char pad[128 - sizeof (uint32_t)];
447	};	445	};
448	# ifdef __cplusplus
449	}
450	# endif
451	#endif	446	#endif
452		447
453	/**/	448	/**/
454		449
455	#if EV_VERIFY >= 3	450	#if EV_VERIFY >= 3
…		…
457	#else	452	#else
458	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
459	#endif	454	#endif
460		455
461	/*	456	/*
462	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
463	* It is added to ev_rt_now when scheduling periodics
464	* to ensure progress, time-wise, even when rounding
465	* errors are against us.
466	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
467	* Better solutions welcome.
468	*/	459	*/
469	#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 /
470		462
471	#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) */
472	#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) */
473		465
474	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)	466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
…		…
537	# include "ev_win32.c"	529	# include "ev_win32.c"
538	#endif	530	#endif
539		531
540	/*****************************************************************************/	532	/*****************************************************************************/
541		533
		534	/* define a suitable floor function (only used by periodics atm) */
		535
		536	#if EV_USE_FLOOR
		537	# include <math.h>
		538	# define ev_floor(v) floor (v)
		539	#else
		540
		541	#include <float.h>
		542
		543	/* a floor() replacement function, should be independent of ev_tstamp type */
		544	static ev_tstamp noinline
		545	ev_floor (ev_tstamp v)
		546	{
		547	/* the choice of shift factor is not terribly important */
		548	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		549	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		550	#else
		551	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		552	#endif
		553
		554	/* argument too large for an unsigned long? */
		555	if (expect_false (v >= shift))
		556	{
		557	ev_tstamp f;
		558
		559	if (v == v - 1.)
		560	return v; /* very large number */
		561
		562	f = shift * ev_floor (v * (1. / shift));
		563	return f + ev_floor (v - f);
		564	}
		565
		566	/* special treatment for negative args? */
		567	if (expect_false (v < 0.))
		568	{
		569	ev_tstamp f = -ev_floor (-v);
		570
		571	return f - (f == v ? 0 : 1);
		572	}
		573
		574	/* fits into an unsigned long */
		575	return (unsigned long)v;
		576	}
		577
		578	#endif
		579
		580	/*****************************************************************************/
		581
		582	#ifdef __linux
		583	# include <sys/utsname.h>
		584	#endif
		585
		586	static unsigned int noinline
		587	ev_linux_version (void)
		588	{
		589	#ifdef __linux
		590	unsigned int v = 0;
		591	struct utsname buf;
		592	int i;
		593	char *p = buf.release;
		594
		595	if (uname (&buf))
		596	return 0;
		597
		598	for (i = 3+1; --i; )
		599	{
		600	unsigned int c = 0;
		601
		602	for (;;)
		603	{
		604	if (p >= '0' && p <= '9')
		605	c = c * 10 + *p++ - '0';
		606	else
		607	{
		608	p += *p == '.';
		609	break;
		610	}
		611	}
		612
		613	v = (v << 8) \| c;
		614	}
		615
		616	return v;
		617	#else
		618	return 0;
		619	#endif
		620	}
		621
		622	/*****************************************************************************/
		623
542	#if EV_AVOID_STDIO	624	#if EV_AVOID_STDIO
543	static void noinline	625	static void noinline
544	ev_printerr (const char *msg)	626	ev_printerr (const char *msg)
545	{	627	{
546	write (STDERR_FILENO, msg, strlen (msg));	628	write (STDERR_FILENO, msg, strlen (msg));
…		…
564	if (syserr_cb)	646	if (syserr_cb)
565	syserr_cb (msg);	647	syserr_cb (msg);
566	else	648	else
567	{	649	{
568	#if EV_AVOID_STDIO	650	#if EV_AVOID_STDIO
569	const char *err = strerror (errno);
570
571	ev_printerr (msg);	651	ev_printerr (msg);
572	ev_printerr (": ");	652	ev_printerr (": ");
573	ev_printerr (err);	653	ev_printerr (strerror (errno));
574	ev_printerr ("\n");	654	ev_printerr ("\n");
575	#else	655	#else
576	perror (msg);	656	perror (msg);
577	#endif	657	#endif
578	abort ();	658	abort ();
…		…
612	ptr = alloc (ptr, size);	692	ptr = alloc (ptr, size);
613		693
614	if (!ptr && size)	694	if (!ptr && size)
615	{	695	{
616	#if EV_AVOID_STDIO	696	#if EV_AVOID_STDIO
617	ev_printerr ("libev: memory allocation failed, aborting.\n");	697	ev_printerr ("(libev) memory allocation failed, aborting.\n");
618	#else	698	#else
619	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	699	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
620	#endif	700	#endif
621	abort ();	701	abort ();
622	}	702	}
623		703
624	return ptr;	704	return ptr;
…		…
641	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	721	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
642	unsigned char unused;	722	unsigned char unused;
643	#if EV_USE_EPOLL	723	#if EV_USE_EPOLL
644	unsigned int egen; /* generation counter to counter epoll bugs */	724	unsigned int egen; /* generation counter to counter epoll bugs */
645	#endif	725	#endif
646	#if EV_SELECT_IS_WINSOCKET	726	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
647	SOCKET handle;	727	SOCKET handle;
		728	#endif
		729	#if EV_USE_IOCP
		730	OVERLAPPED or, ow;
648	#endif	731	#endif
649	} ANFD;	732	} ANFD;
650		733
651	/* stores the pending event set for a given watcher */	734	/* stores the pending event set for a given watcher */
652	typedef struct	735	typedef struct
…		…
717	# define EV_RELEASE_CB (void)0	800	# define EV_RELEASE_CB (void)0
718	# define EV_ACQUIRE_CB (void)0	801	# define EV_ACQUIRE_CB (void)0
719	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)	802	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
720	#endif	803	#endif
721		804
722	#define EVUNLOOP_RECURSE 0x80	805	#define EVBREAK_RECURSE 0x80
723		806
724	/*****************************************************************************/	807	/*****************************************************************************/
725		808
726	#ifndef EV_HAVE_EV_TIME	809	#ifndef EV_HAVE_EV_TIME
727	ev_tstamp	810	ev_tstamp
…		…
781	struct timeval tv;	864	struct timeval tv;
782		865
783	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	866	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
784	/* something not guaranteed by newer posix versions, but guaranteed */	867	/* something not guaranteed by newer posix versions, but guaranteed */
785	/* by older ones */	868	/* by older ones */
786	EV_TS_SET (tv, delay);	869	EV_TV_SET (tv, delay);
787	select (0, 0, 0, 0, &tv);	870	select (0, 0, 0, 0, &tv);
788	#endif	871	#endif
789	}	872	}
790	}	873	}
791		874
…		…
937	inline_size void	1020	inline_size void
938	fd_reify (EV_P)	1021	fd_reify (EV_P)
939	{	1022	{
940	int i;	1023	int i;
941		1024
		1025	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1026	for (i = 0; i < fdchangecnt; ++i)
		1027	{
		1028	int fd = fdchanges [i];
		1029	ANFD *anfd = anfds + fd;
		1030
		1031	if (anfd->reify & EV__IOFDSET && anfd->head)
		1032	{
		1033	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1034
		1035	if (handle != anfd->handle)
		1036	{
		1037	unsigned long arg;
		1038
		1039	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1040
		1041	/* handle changed, but fd didn't - we need to do it in two steps */
		1042	backend_modify (EV_A_ fd, anfd->events, 0);
		1043	anfd->events = 0;
		1044	anfd->handle = handle;
		1045	}
		1046	}
		1047	}
		1048	#endif
		1049
942	for (i = 0; i < fdchangecnt; ++i)	1050	for (i = 0; i < fdchangecnt; ++i)
943	{	1051	{
944	int fd = fdchanges [i];	1052	int fd = fdchanges [i];
945	ANFD *anfd = anfds + fd;	1053	ANFD *anfd = anfds + fd;
946	ev_io *w;	1054	ev_io *w;
947		1055
948	unsigned char events = 0;	1056	unsigned char o_events = anfd->events;
		1057	unsigned char o_reify = anfd->reify;
949		1058
950	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1059	anfd->reify = 0;
951	events \|= (unsigned char)w->events;
952		1060
953	#if EV_SELECT_IS_WINSOCKET	1061	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
954	if (events)
955	{	1062	{
956	unsigned long arg;	1063	anfd->events = 0;
957	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1064
958	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	1065	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		1066	anfd->events \|= (unsigned char)w->events;
		1067
		1068	if (o_events != anfd->events)
		1069	o_reify = EV__IOFDSET; /* actually \|= */
959	}	1070	}
960	#endif
961		1071
962	{	1072	if (o_reify & EV__IOFDSET)
963	unsigned char o_events = anfd->events;
964	unsigned char o_reify = anfd->reify;
965
966	anfd->reify = 0;
967	anfd->events = events;
968
969	if (o_events != events \|\| o_reify & EV__IOFDSET)
970	backend_modify (EV_A_ fd, o_events, events);	1073	backend_modify (EV_A_ fd, o_events, anfd->events);
971	}
972	}	1074	}
973		1075
974	fdchangecnt = 0;	1076	fdchangecnt = 0;
975	}	1077	}
976		1078
…		…
1266	inline_size void	1368	inline_size void
1267	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1369	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1268	{	1370	{
1269	if (!*flag)	1371	if (!*flag)
1270	{	1372	{
1271	int old_errno = errno; /* save errno because write might clobber it */
1272	char dummy;
1273
1274	*flag = 1;	1373	*flag = 1;
1275		1374
		1375	pipe_write_skipped = 1;
		1376
		1377	if (pipe_write_wanted)
		1378	{
		1379	int old_errno = errno; /* save errno because write will clobber it */
		1380	char dummy;
		1381
		1382	pipe_write_skipped = 0;
		1383
1276	#if EV_USE_EVENTFD	1384	#if EV_USE_EVENTFD
1277	if (evfd >= 0)	1385	if (evfd >= 0)
1278	{	1386	{
1279	uint64_t counter = 1;	1387	uint64_t counter = 1;
1280	write (evfd, &counter, sizeof (uint64_t));	1388	write (evfd, &counter, sizeof (uint64_t));
		1389	}
		1390	else
		1391	#endif
		1392	{
		1393	/* win32 people keep sending patches that change this write() to send() */
		1394	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1395	/* so when you think this write should be a send instead, please find out */
		1396	/* where your send() is from - it's definitely not the microsoft send, and */
		1397	/* tell me. thank you. */
		1398	write (evpipe [1], &dummy, 1);
		1399	}
		1400
		1401	errno = old_errno;
1281	}	1402	}
1282	else
1283	#endif
1284	/* win32 people keep sending patches that change this write() to send() */
1285	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1286	/* so when you think this write should be a send instead, please find out */
1287	/* where your send() is from - it's definitely not the microsoft send, and */
1288	/* tell me. thank you. */
1289	write (evpipe [1], &dummy, 1);
1290
1291	errno = old_errno;
1292	}	1403	}
1293	}	1404	}
1294		1405
1295	/* called whenever the libev signal pipe */	1406	/* called whenever the libev signal pipe */
1296	/* got some events (signal, async) */	1407	/* got some events (signal, async) */
1297	static void	1408	static void
1298	pipecb (EV_P_ ev_io *iow, int revents)	1409	pipecb (EV_P_ ev_io *iow, int revents)
1299	{	1410	{
1300	int i;	1411	int i;
1301		1412
		1413	if (revents & EV_READ)
		1414	{
1302	#if EV_USE_EVENTFD	1415	#if EV_USE_EVENTFD
1303	if (evfd >= 0)	1416	if (evfd >= 0)
1304	{	1417	{
1305	uint64_t counter;	1418	uint64_t counter;
1306	read (evfd, &counter, sizeof (uint64_t));	1419	read (evfd, &counter, sizeof (uint64_t));
1307	}	1420	}
1308	else	1421	else
1309	#endif	1422	#endif
1310	{	1423	{
1311	char dummy;	1424	char dummy;
1312	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1425	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1313	read (evpipe [0], &dummy, 1);	1426	read (evpipe [0], &dummy, 1);
		1427	}
1314	}	1428	}
1315		1429
		1430	pipe_write_skipped = 0;
		1431
		1432	#if EV_SIGNAL_ENABLE
1316	if (sig_pending)	1433	if (sig_pending)
1317	{	1434	{
1318	sig_pending = 0;	1435	sig_pending = 0;
1319		1436
1320	for (i = EV_NSIG - 1; i--; )	1437	for (i = EV_NSIG - 1; i--; )
1321	if (expect_false (signals [i].pending))	1438	if (expect_false (signals [i].pending))
1322	ev_feed_signal_event (EV_A_ i + 1);	1439	ev_feed_signal_event (EV_A_ i + 1);
1323	}	1440	}
		1441	#endif
1324		1442
1325	#if EV_ASYNC_ENABLE	1443	#if EV_ASYNC_ENABLE
1326	if (async_pending)	1444	if (async_pending)
1327	{	1445	{
1328	async_pending = 0;	1446	async_pending = 0;
…		…
1337	#endif	1455	#endif
1338	}	1456	}
1339		1457
1340	/*****************************************************************************/	1458	/*****************************************************************************/
1341		1459
		1460	void
		1461	ev_feed_signal (int signum)
		1462	{
		1463	#if EV_MULTIPLICITY
		1464	EV_P = signals [signum - 1].loop;
		1465
		1466	if (!EV_A)
		1467	return;
		1468	#endif
		1469
		1470	evpipe_init (EV_A);
		1471
		1472	signals [signum - 1].pending = 1;
		1473	evpipe_write (EV_A_ &sig_pending);
		1474	}
		1475
1342	static void	1476	static void
1343	ev_sighandler (int signum)	1477	ev_sighandler (int signum)
1344	{	1478	{
1345	#if EV_MULTIPLICITY
1346	EV_P = signals [signum - 1].loop;
1347	#endif
1348
1349	#ifdef _WIN32	1479	#ifdef _WIN32
1350	signal (signum, ev_sighandler);	1480	signal (signum, ev_sighandler);
1351	#endif	1481	#endif
1352		1482
1353	signals [signum - 1].pending = 1;	1483	ev_feed_signal (signum);
1354	evpipe_write (EV_A_ &sig_pending);
1355	}	1484	}
1356		1485
1357	void noinline	1486	void noinline
1358	ev_feed_signal_event (EV_P_ int signum)	1487	ev_feed_signal_event (EV_P_ int signum)
1359	{	1488	{
…		…
1459		1588
1460	#endif	1589	#endif
1461		1590
1462	/*****************************************************************************/	1591	/*****************************************************************************/
1463		1592
		1593	#if EV_USE_IOCP
		1594	# include "ev_iocp.c"
		1595	#endif
1464	#if EV_USE_PORT	1596	#if EV_USE_PORT
1465	# include "ev_port.c"	1597	# include "ev_port.c"
1466	#endif	1598	#endif
1467	#if EV_USE_KQUEUE	1599	#if EV_USE_KQUEUE
1468	# include "ev_kqueue.c"	1600	# include "ev_kqueue.c"
…		…
1541	ev_embeddable_backends (void)	1673	ev_embeddable_backends (void)
1542	{	1674	{
1543	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1675	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1544		1676
1545	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1677	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1546	/* please fix it and tell me how to detect the fix */	1678	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1547	flags &= ~EVBACKEND_EPOLL;	1679	flags &= ~EVBACKEND_EPOLL;
1548		1680
1549	return flags;	1681	return flags;
1550	}	1682	}
1551		1683
1552	unsigned int	1684	unsigned int
…		…
1608	static void noinline	1740	static void noinline
1609	loop_init (EV_P_ unsigned int flags)	1741	loop_init (EV_P_ unsigned int flags)
1610	{	1742	{
1611	if (!backend)	1743	if (!backend)
1612	{	1744	{
		1745	origflags = flags;
		1746
1613	#if EV_USE_REALTIME	1747	#if EV_USE_REALTIME
1614	if (!have_realtime)	1748	if (!have_realtime)
1615	{	1749	{
1616	struct timespec ts;	1750	struct timespec ts;
1617		1751
…		…
1639	if (!(flags & EVFLAG_NOENV)	1773	if (!(flags & EVFLAG_NOENV)
1640	&& !enable_secure ()	1774	&& !enable_secure ()
1641	&& getenv ("LIBEV_FLAGS"))	1775	&& getenv ("LIBEV_FLAGS"))
1642	flags = atoi (getenv ("LIBEV_FLAGS"));	1776	flags = atoi (getenv ("LIBEV_FLAGS"));
1643		1777
1644	ev_rt_now = ev_time ();	1778	ev_rt_now = ev_time ();
1645	mn_now = get_clock ();	1779	mn_now = get_clock ();
1646	now_floor = mn_now;	1780	now_floor = mn_now;
1647	rtmn_diff = ev_rt_now - mn_now;	1781	rtmn_diff = ev_rt_now - mn_now;
1648	#if EV_FEATURE_API	1782	#if EV_FEATURE_API
1649	invoke_cb = ev_invoke_pending;	1783	invoke_cb = ev_invoke_pending;
1650	#endif	1784	#endif
1651		1785
1652	io_blocktime = 0.;	1786	io_blocktime = 0.;
1653	timeout_blocktime = 0.;	1787	timeout_blocktime = 0.;
1654	backend = 0;	1788	backend = 0;
1655	backend_fd = -1;	1789	backend_fd = -1;
1656	sig_pending = 0;	1790	sig_pending = 0;
1657	#if EV_ASYNC_ENABLE	1791	#if EV_ASYNC_ENABLE
1658	async_pending = 0;	1792	async_pending = 0;
1659	#endif	1793	#endif
		1794	pipe_write_skipped = 0;
		1795	pipe_write_wanted = 0;
1660	#if EV_USE_INOTIFY	1796	#if EV_USE_INOTIFY
1661	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1797	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1662	#endif	1798	#endif
1663	#if EV_USE_SIGNALFD	1799	#if EV_USE_SIGNALFD
1664	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1800	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1665	#endif	1801	#endif
1666		1802
1667	if (!(flags & 0x0000ffffU))	1803	if (!(flags & EVBACKEND_MASK))
1668	flags \|= ev_recommended_backends ();	1804	flags \|= ev_recommended_backends ();
1669		1805
		1806	#if EV_USE_IOCP
		1807	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1808	#endif
1670	#if EV_USE_PORT	1809	#if EV_USE_PORT
1671	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1810	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1672	#endif	1811	#endif
1673	#if EV_USE_KQUEUE	1812	#if EV_USE_KQUEUE
1674	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1813	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1691	#endif	1830	#endif
1692	}	1831	}
1693	}	1832	}
1694		1833
1695	/* free up a loop structure */	1834	/* free up a loop structure */
1696	static void noinline	1835	void
1697	loop_destroy (EV_P)	1836	ev_loop_destroy (EV_P)
1698	{	1837	{
1699	int i;	1838	int i;
		1839
		1840	#if EV_MULTIPLICITY
		1841	/* mimic free (0) */
		1842	if (!EV_A)
		1843	return;
		1844	#endif
		1845
		1846	#if EV_CLEANUP_ENABLE
		1847	/* queue cleanup watchers (and execute them) */
		1848	if (expect_false (cleanupcnt))
		1849	{
		1850	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1851	EV_INVOKE_PENDING;
		1852	}
		1853	#endif
		1854
		1855	#if EV_CHILD_ENABLE
		1856	if (ev_is_active (&childev))
		1857	{
		1858	ev_ref (EV_A); /* child watcher */
		1859	ev_signal_stop (EV_A_ &childev);
		1860	}
		1861	#endif
1700		1862
1701	if (ev_is_active (&pipe_w))	1863	if (ev_is_active (&pipe_w))
1702	{	1864	{
1703	/ev_ref (EV_A);/	1865	/ev_ref (EV_A);/
1704	/ev_io_stop (EV_A_ &pipe_w);/	1866	/ev_io_stop (EV_A_ &pipe_w);/
…		…
1726	#endif	1888	#endif
1727		1889
1728	if (backend_fd >= 0)	1890	if (backend_fd >= 0)
1729	close (backend_fd);	1891	close (backend_fd);
1730		1892
		1893	#if EV_USE_IOCP
		1894	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1895	#endif
1731	#if EV_USE_PORT	1896	#if EV_USE_PORT
1732	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1897	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1733	#endif	1898	#endif
1734	#if EV_USE_KQUEUE	1899	#if EV_USE_KQUEUE
1735	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1900	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1762	array_free (periodic, EMPTY);	1927	array_free (periodic, EMPTY);
1763	#endif	1928	#endif
1764	#if EV_FORK_ENABLE	1929	#if EV_FORK_ENABLE
1765	array_free (fork, EMPTY);	1930	array_free (fork, EMPTY);
1766	#endif	1931	#endif
		1932	#if EV_CLEANUP_ENABLE
		1933	array_free (cleanup, EMPTY);
		1934	#endif
1767	array_free (prepare, EMPTY);	1935	array_free (prepare, EMPTY);
1768	array_free (check, EMPTY);	1936	array_free (check, EMPTY);
1769	#if EV_ASYNC_ENABLE	1937	#if EV_ASYNC_ENABLE
1770	array_free (async, EMPTY);	1938	array_free (async, EMPTY);
1771	#endif	1939	#endif
1772		1940
1773	backend = 0;	1941	backend = 0;
		1942
		1943	#if EV_MULTIPLICITY
		1944	if (ev_is_default_loop (EV_A))
		1945	#endif
		1946	ev_default_loop_ptr = 0;
		1947	#if EV_MULTIPLICITY
		1948	else
		1949	ev_free (EV_A);
		1950	#endif
1774	}	1951	}
1775		1952
1776	#if EV_USE_INOTIFY	1953	#if EV_USE_INOTIFY
1777	inline_size void infy_fork (EV_P);	1954	inline_size void infy_fork (EV_P);
1778	#endif	1955	#endif
…		…
1793	infy_fork (EV_A);	1970	infy_fork (EV_A);
1794	#endif	1971	#endif
1795		1972
1796	if (ev_is_active (&pipe_w))	1973	if (ev_is_active (&pipe_w))
1797	{	1974	{
1798	/* this "locks" the handlers against writing to the pipe */	1975	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1799	/* while we modify the fd vars */
1800	sig_pending = 1;
1801	#if EV_ASYNC_ENABLE
1802	async_pending = 1;
1803	#endif
1804		1976
1805	ev_ref (EV_A);	1977	ev_ref (EV_A);
1806	ev_io_stop (EV_A_ &pipe_w);	1978	ev_io_stop (EV_A_ &pipe_w);
1807		1979
1808	#if EV_USE_EVENTFD	1980	#if EV_USE_EVENTFD
…		…
1837	loop_init (EV_A_ flags);	2009	loop_init (EV_A_ flags);
1838		2010
1839	if (ev_backend (EV_A))	2011	if (ev_backend (EV_A))
1840	return EV_A;	2012	return EV_A;
1841		2013
		2014	ev_free (EV_A);
1842	return 0;	2015	return 0;
1843	}	2016	}
1844		2017
1845	void
1846	ev_loop_destroy (EV_P)
1847	{
1848	loop_destroy (EV_A);
1849	ev_free (loop);
1850	}
1851
1852	void
1853	ev_loop_fork (EV_P)
1854	{
1855	postfork = 1; /* must be in line with ev_default_fork */
1856	}
1857	#endif /* multiplicity */	2018	#endif /* multiplicity */
1858		2019
1859	#if EV_VERIFY	2020	#if EV_VERIFY
1860	static void noinline	2021	static void noinline
1861	verify_watcher (EV_P_ W w)	2022	verify_watcher (EV_P_ W w)
…		…
1936	#if EV_FORK_ENABLE	2097	#if EV_FORK_ENABLE
1937	assert (forkmax >= forkcnt);	2098	assert (forkmax >= forkcnt);
1938	array_verify (EV_A_ (W *)forks, forkcnt);	2099	array_verify (EV_A_ (W *)forks, forkcnt);
1939	#endif	2100	#endif
1940		2101
		2102	#if EV_CLEANUP_ENABLE
		2103	assert (cleanupmax >= cleanupcnt);
		2104	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2105	#endif
		2106
1941	#if EV_ASYNC_ENABLE	2107	#if EV_ASYNC_ENABLE
1942	assert (asyncmax >= asynccnt);	2108	assert (asyncmax >= asynccnt);
1943	array_verify (EV_A_ (W *)asyncs, asynccnt);	2109	array_verify (EV_A_ (W *)asyncs, asynccnt);
1944	#endif	2110	#endif
1945		2111
…		…
1963	}	2129	}
1964	#endif	2130	#endif
1965		2131
1966	#if EV_MULTIPLICITY	2132	#if EV_MULTIPLICITY
1967	struct ev_loop *	2133	struct ev_loop *
1968	ev_default_loop_init (unsigned int flags)
1969	#else	2134	#else
1970	int	2135	int
		2136	#endif
1971	ev_default_loop (unsigned int flags)	2137	ev_default_loop (unsigned int flags)
1972	#endif
1973	{	2138	{
1974	if (!ev_default_loop_ptr)	2139	if (!ev_default_loop_ptr)
1975	{	2140	{
1976	#if EV_MULTIPLICITY	2141	#if EV_MULTIPLICITY
1977	EV_P = ev_default_loop_ptr = &default_loop_struct;	2142	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
1996		2161
1997	return ev_default_loop_ptr;	2162	return ev_default_loop_ptr;
1998	}	2163	}
1999		2164
2000	void	2165	void
2001	ev_default_destroy (void)	2166	ev_loop_fork (EV_P)
2002	{	2167	{
2003	#if EV_MULTIPLICITY
2004	EV_P = ev_default_loop_ptr;
2005	#endif
2006
2007	ev_default_loop_ptr = 0;
2008
2009	#if EV_CHILD_ENABLE
2010	ev_ref (EV_A); /* child watcher */
2011	ev_signal_stop (EV_A_ &childev);
2012	#endif
2013
2014	loop_destroy (EV_A);
2015	}
2016
2017	void
2018	ev_default_fork (void)
2019	{
2020	#if EV_MULTIPLICITY
2021	EV_P = ev_default_loop_ptr;
2022	#endif
2023
2024	postfork = 1; /* must be in line with ev_loop_fork */	2168	postfork = 1; /* must be in line with ev_default_fork */
2025	}	2169	}
2026		2170
2027	/*****************************************************************************/	2171	/*****************************************************************************/
2028		2172
2029	void	2173	void
…		…
2051		2195
2052	for (pri = NUMPRI; pri--; )	2196	for (pri = NUMPRI; pri--; )
2053	while (pendingcnt [pri])	2197	while (pendingcnt [pri])
2054	{	2198	{
2055	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2199	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2056
2057	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2058	/* ^ this is no longer true, as pending_w could be here */
2059		2200
2060	p->w->pending = 0;	2201	p->w->pending = 0;
2061	EV_CB_INVOKE (p->w, p->events);	2202	EV_CB_INVOKE (p->w, p->events);
2062	EV_FREQUENT_CHECK;	2203	EV_FREQUENT_CHECK;
2063	}	2204	}
…		…
2125	feed_reverse_done (EV_A_ EV_TIMER);	2266	feed_reverse_done (EV_A_ EV_TIMER);
2126	}	2267	}
2127	}	2268	}
2128		2269
2129	#if EV_PERIODIC_ENABLE	2270	#if EV_PERIODIC_ENABLE
		2271
		2272	static void noinline
		2273	periodic_recalc (EV_P_ ev_periodic *w)
		2274	{
		2275	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2276	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2277
		2278	/* the above almost always errs on the low side */
		2279	while (at <= ev_rt_now)
		2280	{
		2281	ev_tstamp nat = at + w->interval;
		2282
		2283	/* when resolution fails us, we use ev_rt_now */
		2284	if (expect_false (nat == at))
		2285	{
		2286	at = ev_rt_now;
		2287	break;
		2288	}
		2289
		2290	at = nat;
		2291	}
		2292
		2293	ev_at (w) = at;
		2294	}
		2295
2130	/* make periodics pending */	2296	/* make periodics pending */
2131	inline_size void	2297	inline_size void
2132	periodics_reify (EV_P)	2298	periodics_reify (EV_P)
2133	{	2299	{
2134	EV_FREQUENT_CHECK;	2300	EV_FREQUENT_CHECK;
…		…
2153	ANHE_at_cache (periodics [HEAP0]);	2319	ANHE_at_cache (periodics [HEAP0]);
2154	downheap (periodics, periodiccnt, HEAP0);	2320	downheap (periodics, periodiccnt, HEAP0);
2155	}	2321	}
2156	else if (w->interval)	2322	else if (w->interval)
2157	{	2323	{
2158	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2324	periodic_recalc (EV_A_ w);
2159	/* if next trigger time is not sufficiently in the future, put it there */
2160	/* this might happen because of floating point inexactness */
2161	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2162	{
2163	ev_at (w) += w->interval;
2164
2165	/* if interval is unreasonably low we might still have a time in the past */
2166	/* so correct this. this will make the periodic very inexact, but the user */
2167	/* has effectively asked to get triggered more often than possible */
2168	if (ev_at (w) < ev_rt_now)
2169	ev_at (w) = ev_rt_now;
2170	}
2171
2172	ANHE_at_cache (periodics [HEAP0]);	2325	ANHE_at_cache (periodics [HEAP0]);
2173	downheap (periodics, periodiccnt, HEAP0);	2326	downheap (periodics, periodiccnt, HEAP0);
2174	}	2327	}
2175	else	2328	else
2176	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2329	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2197	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2350	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2198		2351
2199	if (w->reschedule_cb)	2352	if (w->reschedule_cb)
2200	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2353	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2201	else if (w->interval)	2354	else if (w->interval)
2202	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2355	periodic_recalc (EV_A_ w);
2203		2356
2204	ANHE_at_cache (periodics [i]);	2357	ANHE_at_cache (periodics [i]);
2205	}	2358	}
2206		2359
2207	reheap (periodics, periodiccnt);	2360	reheap (periodics, periodiccnt);
…		…
2254	* doesn't hurt either as we only do this on time-jumps or	2407	* doesn't hurt either as we only do this on time-jumps or
2255	* in the unlikely event of having been preempted here.	2408	* in the unlikely event of having been preempted here.
2256	*/	2409	*/
2257	for (i = 4; --i; )	2410	for (i = 4; --i; )
2258	{	2411	{
		2412	ev_tstamp diff;
2259	rtmn_diff = ev_rt_now - mn_now;	2413	rtmn_diff = ev_rt_now - mn_now;
2260		2414
		2415	diff = odiff - rtmn_diff;
		2416
2261	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2417	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2262	return; /* all is well */	2418	return; /* all is well */
2263		2419
2264	ev_rt_now = ev_time ();	2420	ev_rt_now = ev_time ();
2265	mn_now = get_clock ();	2421	mn_now = get_clock ();
2266	now_floor = mn_now;	2422	now_floor = mn_now;
…		…
2289	mn_now = ev_rt_now;	2445	mn_now = ev_rt_now;
2290	}	2446	}
2291	}	2447	}
2292		2448
2293	void	2449	void
2294	ev_loop (EV_P_ int flags)	2450	ev_run (EV_P_ int flags)
2295	{	2451	{
2296	#if EV_FEATURE_API	2452	#if EV_FEATURE_API
2297	++loop_depth;	2453	++loop_depth;
2298	#endif	2454	#endif
2299		2455
2300	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));	2456	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2301		2457
2302	loop_done = EVUNLOOP_CANCEL;	2458	loop_done = EVBREAK_CANCEL;
2303		2459
2304	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */	2460	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2305		2461
2306	do	2462	do
2307	{	2463	{
…		…
2350	/* calculate blocking time */	2506	/* calculate blocking time */
2351	{	2507	{
2352	ev_tstamp waittime = 0.;	2508	ev_tstamp waittime = 0.;
2353	ev_tstamp sleeptime = 0.;	2509	ev_tstamp sleeptime = 0.;
2354		2510
		2511	/* remember old timestamp for io_blocktime calculation */
		2512	ev_tstamp prev_mn_now = mn_now;
		2513
		2514	/* update time to cancel out callback processing overhead */
		2515	time_update (EV_A_ 1e100);
		2516
		2517	/* from now on, we want a pipe-wake-up */
		2518	pipe_write_wanted = 1;
		2519
2355	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))	2520	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2356	{	2521	{
2357	/* remember old timestamp for io_blocktime calculation */
2358	ev_tstamp prev_mn_now = mn_now;
2359
2360	/* update time to cancel out callback processing overhead */
2361	time_update (EV_A_ 1e100);
2362
2363	waittime = MAX_BLOCKTIME;	2522	waittime = MAX_BLOCKTIME;
2364		2523
2365	if (timercnt)	2524	if (timercnt)
2366	{	2525	{
2367	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2526	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2368	if (waittime > to) waittime = to;	2527	if (waittime > to) waittime = to;
2369	}	2528	}
2370		2529
2371	#if EV_PERIODIC_ENABLE	2530	#if EV_PERIODIC_ENABLE
2372	if (periodiccnt)	2531	if (periodiccnt)
2373	{	2532	{
2374	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2533	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2375	if (waittime > to) waittime = to;	2534	if (waittime > to) waittime = to;
2376	}	2535	}
2377	#endif	2536	#endif
2378		2537
2379	/* don't let timeouts decrease the waittime below timeout_blocktime */	2538	/* don't let timeouts decrease the waittime below timeout_blocktime */
2380	if (expect_false (waittime < timeout_blocktime))	2539	if (expect_false (waittime < timeout_blocktime))
2381	waittime = timeout_blocktime;	2540	waittime = timeout_blocktime;
		2541
		2542	/* at this point, we NEED to wait, so we have to ensure */
		2543	/* to pass a minimum nonzero value to the backend */
		2544	if (expect_false (waittime < backend_mintime))
		2545	waittime = backend_mintime;
2382		2546
2383	/* extra check because io_blocktime is commonly 0 */	2547	/* extra check because io_blocktime is commonly 0 */
2384	if (expect_false (io_blocktime))	2548	if (expect_false (io_blocktime))
2385	{	2549	{
2386	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2550	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2387		2551
2388	if (sleeptime > waittime - backend_fudge)	2552	if (sleeptime > waittime - backend_mintime)
2389	sleeptime = waittime - backend_fudge;	2553	sleeptime = waittime - backend_mintime;
2390		2554
2391	if (expect_true (sleeptime > 0.))	2555	if (expect_true (sleeptime > 0.))
2392	{	2556	{
2393	ev_sleep (sleeptime);	2557	ev_sleep (sleeptime);
2394	waittime -= sleeptime;	2558	waittime -= sleeptime;
…		…
2397	}	2561	}
2398		2562
2399	#if EV_FEATURE_API	2563	#if EV_FEATURE_API
2400	++loop_count;	2564	++loop_count;
2401	#endif	2565	#endif
2402	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */	2566	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2403	backend_poll (EV_A_ waittime);	2567	backend_poll (EV_A_ waittime);
2404	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */	2568	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2569
		2570	pipe_write_wanted = 0;
		2571
		2572	if (pipe_write_skipped)
		2573	{
		2574	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2575	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2576	}
		2577
2405		2578
2406	/* update ev_rt_now, do magic */	2579	/* update ev_rt_now, do magic */
2407	time_update (EV_A_ waittime + sleeptime);	2580	time_update (EV_A_ waittime + sleeptime);
2408	}	2581	}
2409		2582
…		…
2427	EV_INVOKE_PENDING;	2600	EV_INVOKE_PENDING;
2428	}	2601	}
2429	while (expect_true (	2602	while (expect_true (
2430	activecnt	2603	activecnt
2431	&& !loop_done	2604	&& !loop_done
2432	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))	2605	&& !(flags & (EVRUN_ONCE \| EVRUN_NOWAIT))
2433	));	2606	));
2434		2607
2435	if (loop_done == EVUNLOOP_ONE)	2608	if (loop_done == EVBREAK_ONE)
2436	loop_done = EVUNLOOP_CANCEL;	2609	loop_done = EVBREAK_CANCEL;
2437		2610
2438	#if EV_FEATURE_API	2611	#if EV_FEATURE_API
2439	--loop_depth;	2612	--loop_depth;
2440	#endif	2613	#endif
2441	}	2614	}
2442		2615
2443	void	2616	void
2444	ev_unloop (EV_P_ int how)	2617	ev_break (EV_P_ int how)
2445	{	2618	{
2446	loop_done = how;	2619	loop_done = how;
2447	}	2620	}
2448		2621
2449	void	2622	void
…		…
2597	EV_FREQUENT_CHECK;	2770	EV_FREQUENT_CHECK;
2598		2771
2599	wlist_del (&anfds[w->fd].head, (WL)w);	2772	wlist_del (&anfds[w->fd].head, (WL)w);
2600	ev_stop (EV_A_ (W)w);	2773	ev_stop (EV_A_ (W)w);
2601		2774
2602	fd_change (EV_A_ w->fd, 1);	2775	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2603		2776
2604	EV_FREQUENT_CHECK;	2777	EV_FREQUENT_CHECK;
2605	}	2778	}
2606		2779
2607	void noinline	2780	void noinline
…		…
2699	if (w->reschedule_cb)	2872	if (w->reschedule_cb)
2700	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2873	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2701	else if (w->interval)	2874	else if (w->interval)
2702	{	2875	{
2703	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2876	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2704	/* this formula differs from the one in periodic_reify because we do not always round up */	2877	periodic_recalc (EV_A_ w);
2705	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2706	}	2878	}
2707	else	2879	else
2708	ev_at (w) = w->offset;	2880	ev_at (w) = w->offset;
2709		2881
2710	EV_FREQUENT_CHECK;	2882	EV_FREQUENT_CHECK;
…		…
2831	sa.sa_handler = ev_sighandler;	3003	sa.sa_handler = ev_sighandler;
2832	sigfillset (&sa.sa_mask);	3004	sigfillset (&sa.sa_mask);
2833	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3005	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2834	sigaction (w->signum, &sa, 0);	3006	sigaction (w->signum, &sa, 0);
2835		3007
		3008	if (origflags & EVFLAG_NOSIGMASK)
		3009	{
2836	sigemptyset (&sa.sa_mask);	3010	sigemptyset (&sa.sa_mask);
2837	sigaddset (&sa.sa_mask, w->signum);	3011	sigaddset (&sa.sa_mask, w->signum);
2838	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3012	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3013	}
2839	#endif	3014	#endif
2840	}	3015	}
2841		3016
2842	EV_FREQUENT_CHECK;	3017	EV_FREQUENT_CHECK;
2843	}	3018	}
…		…
2984	if (!pend \|\| pend == path)	3159	if (!pend \|\| pend == path)
2985	break;	3160	break;
2986		3161
2987	*pend = 0;	3162	*pend = 0;
2988	w->wd = inotify_add_watch (fs_fd, path, mask);	3163	w->wd = inotify_add_watch (fs_fd, path, mask);
2989	}	3164	}
2990	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3165	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2991	}	3166	}
2992	}	3167	}
2993		3168
2994	if (w->wd >= 0)	3169	if (w->wd >= 0)
…		…
3059	{	3234	{
3060	struct inotify_event ev = (struct inotify_event )(buf + ofs);	3235	struct inotify_event ev = (struct inotify_event )(buf + ofs);
3061	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3236	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3062	ofs += sizeof (struct inotify_event) + ev->len;	3237	ofs += sizeof (struct inotify_event) + ev->len;
3063	}	3238	}
3064	}
3065
3066	inline_size unsigned int
3067	ev_linux_version (void)
3068	{
3069	struct utsname buf;
3070	unsigned int v;
3071	int i;
3072	char *p = buf.release;
3073
3074	if (uname (&buf))
3075	return 0;
3076
3077	for (i = 3+1; --i; )
3078	{
3079	unsigned int c = 0;
3080
3081	for (;;)
3082	{
3083	if (p >= '0' && p <= '9')
3084	c = c * 10 + *p++ - '0';
3085	else
3086	{
3087	p += *p == '.';
3088	break;
3089	}
3090	}
3091
3092	v = (v << 8) \| c;
3093	}
3094
3095	return v;
3096	}	3239	}
3097		3240
3098	inline_size void	3241	inline_size void
3099	ev_check_2625 (EV_P)	3242	ev_check_2625 (EV_P)
3100	{	3243	{
…		…
3424		3567
3425	#if EV_EMBED_ENABLE	3568	#if EV_EMBED_ENABLE
3426	void noinline	3569	void noinline
3427	ev_embed_sweep (EV_P_ ev_embed *w)	3570	ev_embed_sweep (EV_P_ ev_embed *w)
3428	{	3571	{
3429	ev_loop (w->other, EVLOOP_NONBLOCK);	3572	ev_run (w->other, EVRUN_NOWAIT);
3430	}	3573	}
3431		3574
3432	static void	3575	static void
3433	embed_io_cb (EV_P_ ev_io *io, int revents)	3576	embed_io_cb (EV_P_ ev_io *io, int revents)
3434	{	3577	{
3435	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	3578	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
3436		3579
3437	if (ev_cb (w))	3580	if (ev_cb (w))
3438	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3581	ev_feed_event (EV_A_ (W)w, EV_EMBED);
3439	else	3582	else
3440	ev_loop (w->other, EVLOOP_NONBLOCK);	3583	ev_run (w->other, EVRUN_NOWAIT);
3441	}	3584	}
3442		3585
3443	static void	3586	static void
3444	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3587	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3445	{	3588	{
…		…
3449	EV_P = w->other;	3592	EV_P = w->other;
3450		3593
3451	while (fdchangecnt)	3594	while (fdchangecnt)
3452	{	3595	{
3453	fd_reify (EV_A);	3596	fd_reify (EV_A);
3454	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3597	ev_run (EV_A_ EVRUN_NOWAIT);
3455	}	3598	}
3456	}	3599	}
3457	}	3600	}
3458		3601
3459	static void	3602	static void
…		…
3465		3608
3466	{	3609	{
3467	EV_P = w->other;	3610	EV_P = w->other;
3468		3611
3469	ev_loop_fork (EV_A);	3612	ev_loop_fork (EV_A);
3470	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3613	ev_run (EV_A_ EVRUN_NOWAIT);
3471	}	3614	}
3472		3615
3473	ev_embed_start (EV_A_ w);	3616	ev_embed_start (EV_A_ w);
3474	}	3617	}
3475		3618
…		…
3567		3710
3568	EV_FREQUENT_CHECK;	3711	EV_FREQUENT_CHECK;
3569	}	3712	}
3570	#endif	3713	#endif
3571		3714
3572	#if EV_ASYNC_ENABLE	3715	#if EV_CLEANUP_ENABLE
3573	void	3716	void
3574	ev_async_start (EV_P_ ev_async *w)	3717	ev_cleanup_start (EV_P_ ev_cleanup *w)
3575	{	3718	{
3576	if (expect_false (ev_is_active (w)))	3719	if (expect_false (ev_is_active (w)))
3577	return;	3720	return;
		3721
		3722	EV_FREQUENT_CHECK;
		3723
		3724	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3725	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3726	cleanups [cleanupcnt - 1] = w;
		3727
		3728	/* cleanup watchers should never keep a refcount on the loop */
		3729	ev_unref (EV_A);
		3730	EV_FREQUENT_CHECK;
		3731	}
		3732
		3733	void
		3734	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3735	{
		3736	clear_pending (EV_A_ (W)w);
		3737	if (expect_false (!ev_is_active (w)))
		3738	return;
		3739
		3740	EV_FREQUENT_CHECK;
		3741	ev_ref (EV_A);
		3742
		3743	{
		3744	int active = ev_active (w);
		3745
		3746	cleanups [active - 1] = cleanups [--cleanupcnt];
		3747	ev_active (cleanups [active - 1]) = active;
		3748	}
		3749
		3750	ev_stop (EV_A_ (W)w);
		3751
		3752	EV_FREQUENT_CHECK;
		3753	}
		3754	#endif
		3755
		3756	#if EV_ASYNC_ENABLE
		3757	void
		3758	ev_async_start (EV_P_ ev_async *w)
		3759	{
		3760	if (expect_false (ev_is_active (w)))
		3761	return;
		3762
		3763	w->sent = 0;
3578		3764
3579	evpipe_init (EV_A);	3765	evpipe_init (EV_A);
3580		3766
3581	EV_FREQUENT_CHECK;	3767	EV_FREQUENT_CHECK;
3582		3768
…		…
3802		3988
3803	#if EV_MULTIPLICITY	3989	#if EV_MULTIPLICITY
3804	#include "ev_wrap.h"	3990	#include "ev_wrap.h"
3805	#endif	3991	#endif
3806		3992
3807	#ifdef __cplusplus	3993	EV_CPP(})
3808	}
3809	#endif
3810		3994

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Comparing libev/ev.c (file contents): Revision 1.348 by root, Fri Oct 15 22:48:25 2010 UTC vs. Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.348 by root, Fri Oct 15 22:48:25 2010 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC