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

Comparing libev/ev.c (file contents):
Revision 1.358 by root, Sun Oct 24 14:44:40 2010 UTC vs.
Revision 1.380 by root, Mon Jun 27 19:20:01 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,
42	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
43	# include EV_CONFIG_H	43	# include EV_CONFIG_H
44	# else	44	# else
45	# include "config.h"	45	# include "config.h"
46	# endif	46	# endif
		47
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
47		53
48	# if HAVE_CLOCK_SYSCALL	54	# if HAVE_CLOCK_SYSCALL
49	# ifndef EV_USE_CLOCK_SYSCALL	55	# ifndef EV_USE_CLOCK_SYSCALL
50	# define EV_USE_CLOCK_SYSCALL 1	56	# define EV_USE_CLOCK_SYSCALL 1
51	# ifndef EV_USE_REALTIME	57	# ifndef EV_USE_REALTIME
…		…
156	# define EV_USE_EVENTFD 0	162	# define EV_USE_EVENTFD 0
157	# endif	163	# endif
158		164
159	#endif	165	#endif
160		166
161	#include <math.h>
162	#include <stdlib.h>	167	#include <stdlib.h>
163	#include <string.h>	168	#include <string.h>
164	#include <fcntl.h>	169	#include <fcntl.h>
165	#include <stddef.h>	170	#include <stddef.h>
166		171
…		…
232	/* to make it compile regardless, just remove the above line, */	237	/* to make it compile regardless, just remove the above line, */
233	/* but consider reporting it, too! :) */	238	/* but consider reporting it, too! :) */
234	# define EV_NSIG 65	239	# define EV_NSIG 65
235	#endif	240	#endif
236		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
237	#ifndef EV_USE_CLOCK_SYSCALL	246	#ifndef EV_USE_CLOCK_SYSCALL
238	# if __linux && __GLIBC__ >= 2	247	# if __linux && __GLIBC__ >= 2
239	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS	248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240	# else	249	# else
241	# define EV_USE_CLOCK_SYSCALL 0	250	# define EV_USE_CLOCK_SYSCALL 0
…		…
376	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
377	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
378	#endif	387	#endif
379		388
380	#if !EV_USE_NANOSLEEP	389	#if !EV_USE_NANOSLEEP
381	# ifndef _WIN32	390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
382	# include <sys/select.h>	392	# include <sys/select.h>
383	# endif	393	# endif
384	#endif	394	#endif
385		395
386	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
…		…
442	#else	452	#else
443	# define EV_FREQUENT_CHECK do { } while (0)	453	# define EV_FREQUENT_CHECK do { } while (0)
444	#endif	454	#endif
445		455
446	/*	456	/*
447	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
448	* It is added to ev_rt_now when scheduling periodics
449	* to ensure progress, time-wise, even when rounding
450	* errors are against us.
451	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
452	* Better solutions welcome.
453	*/	459	*/
454	#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 /
455		462
456	#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) */
457	#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) */
458		465
459	#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)
460	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)	467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
461		468
462	#if __GNUC__ >= 4	469	/* the following are taken from libecb */
463	# define expect(expr,value) __builtin_expect ((expr),(value))	470	/* ecb.h start */
464	# define noinline __attribute__ ((noinline))	471
		472	/* many compilers define _GNUC_ to some versions but then only implement
		473	* what their idiot authors think are the "more important" extensions,
		474	* causing enourmous grief in return for some better fake benchmark numbers.
		475	* or so.
		476	* we try to detect these and simply assume they are not gcc - if they have
		477	* an issue with that they should have done it right in the first place.
		478	*/
		479	#ifndef ECB_GCC_VERSION
		480	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)
		481	#define ECB_GCC_VERSION(major,minor) 0
		482	#else
		483	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		484	#endif
		485	#endif
		486
		487	#if __cplusplus
		488	#define ecb_inline static inline
		489	#elif ECB_GCC_VERSION(2,5)
		490	#define ecb_inline static __inline__
		491	#elif ECB_C99
		492	#define ecb_inline static inline
465	#else	493	#else
466	# define expect(expr,value) (expr)	494	#define ecb_inline static
467	# define noinline
468	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469	# define inline
470	# endif	495	#endif
471	#endif
472		496
		497	#if ECB_GCC_VERSION(3,1)
		498	#define ecb_attribute(attrlist) __attribute__(attrlist)
		499	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		500	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		501	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		502	#else
		503	#define ecb_attribute(attrlist)
		504	#define ecb_is_constant(expr) 0
		505	#define ecb_expect(expr,value) (expr)
		506	#define ecb_prefetch(addr,rw,locality)
		507	#endif
		508
		509	#define ecb_noinline ecb_attribute ((__noinline__))
		510	#define ecb_noreturn ecb_attribute ((__noreturn__))
		511	#define ecb_unused ecb_attribute ((__unused__))
		512	#define ecb_const ecb_attribute ((__const__))
		513	#define ecb_pure ecb_attribute ((__pure__))
		514
		515	#if ECB_GCC_VERSION(4,3)
		516	#define ecb_artificial ecb_attribute ((__artificial__))
		517	#define ecb_hot ecb_attribute ((__hot__))
		518	#define ecb_cold ecb_attribute ((__cold__))
		519	#else
		520	#define ecb_artificial
		521	#define ecb_hot
		522	#define ecb_cold
		523	#endif
		524
		525	/* put around conditional expressions if you are very sure that the */
		526	/* expression is mostly true or mostly false. note that these return */
		527	/* booleans, not the expression. */
473	#define expect_false(expr) expect ((expr) != 0, 0)	528	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474	#define expect_true(expr) expect ((expr) != 0, 1)	529	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		530	/* ecb.h end */
		531
		532	#define expect_false(cond) ecb_expect_false (cond)
		533	#define expect_true(cond) ecb_expect_true (cond)
		534	#define noinline ecb_noinline
		535
475	#define inline_size static inline	536	#define inline_size ecb_inline
476		537
477	#if EV_FEATURE_CODE	538	#if EV_FEATURE_CODE
478	# define inline_speed static inline	539	# define inline_speed ecb_inline
479	#else	540	#else
480	# define inline_speed static noinline	541	# define inline_speed static noinline
481	#endif	542	#endif
482		543
483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	544	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
522	# include "ev_win32.c"	583	# include "ev_win32.c"
523	#endif	584	#endif
524		585
525	/*****************************************************************************/	586	/*****************************************************************************/
526		587
		588	/* define a suitable floor function (only used by periodics atm) */
		589
		590	#if EV_USE_FLOOR
		591	# include <math.h>
		592	# define ev_floor(v) floor (v)
		593	#else
		594
		595	#include <float.h>
		596
		597	/* a floor() replacement function, should be independent of ev_tstamp type */
		598	static ev_tstamp noinline
		599	ev_floor (ev_tstamp v)
		600	{
		601	/* the choice of shift factor is not terribly important */
		602	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		603	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		604	#else
		605	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		606	#endif
		607
		608	/* argument too large for an unsigned long? */
		609	if (expect_false (v >= shift))
		610	{
		611	ev_tstamp f;
		612
		613	if (v == v - 1.)
		614	return v; /* very large number */
		615
		616	f = shift * ev_floor (v * (1. / shift));
		617	return f + ev_floor (v - f);
		618	}
		619
		620	/* special treatment for negative args? */
		621	if (expect_false (v < 0.))
		622	{
		623	ev_tstamp f = -ev_floor (-v);
		624
		625	return f - (f == v ? 0 : 1);
		626	}
		627
		628	/* fits into an unsigned long */
		629	return (unsigned long)v;
		630	}
		631
		632	#endif
		633
		634	/*****************************************************************************/
		635
527	#ifdef __linux	636	#ifdef __linux
528	# include <sys/utsname.h>	637	# include <sys/utsname.h>
529	#endif	638	#endif
530		639
531	static unsigned int noinline	640	static unsigned int noinline ecb_cold
532	ev_linux_version (void)	641	ev_linux_version (void)
533	{	642	{
534	#ifdef __linux	643	#ifdef __linux
		644	unsigned int v = 0;
535	struct utsname buf;	645	struct utsname buf;
536	unsigned int v;
537	int i;	646	int i;
538	char *p = buf.release;	647	char *p = buf.release;
539		648
540	if (uname (&buf))	649	if (uname (&buf))
541	return 0;	650	return 0;
…		…
565	}	674	}
566		675
567	/*****************************************************************************/	676	/*****************************************************************************/
568		677
569	#if EV_AVOID_STDIO	678	#if EV_AVOID_STDIO
570	static void noinline	679	static void noinline ecb_cold
571	ev_printerr (const char *msg)	680	ev_printerr (const char *msg)
572	{	681	{
573	write (STDERR_FILENO, msg, strlen (msg));	682	write (STDERR_FILENO, msg, strlen (msg));
574	}	683	}
575	#endif	684	#endif
576		685
577	static void (syserr_cb)(const char msg);	686	static void (syserr_cb)(const char msg);
578		687
579	void	688	void ecb_cold
580	ev_set_syserr_cb (void (cb)(const char msg))	689	ev_set_syserr_cb (void (cb)(const char msg))
581	{	690	{
582	syserr_cb = cb;	691	syserr_cb = cb;
583	}	692	}
584		693
585	static void noinline	694	static void noinline ecb_cold
586	ev_syserr (const char *msg)	695	ev_syserr (const char *msg)
587	{	696	{
588	if (!msg)	697	if (!msg)
589	msg = "(libev) system error";	698	msg = "(libev) system error";
590		699
591	if (syserr_cb)	700	if (syserr_cb)
592	syserr_cb (msg);	701	syserr_cb (msg);
593	else	702	else
594	{	703	{
595	#if EV_AVOID_STDIO	704	#if EV_AVOID_STDIO
596	const char *err = strerror (errno);
597
598	ev_printerr (msg);	705	ev_printerr (msg);
599	ev_printerr (": ");	706	ev_printerr (": ");
600	ev_printerr (err);	707	ev_printerr (strerror (errno));
601	ev_printerr ("\n");	708	ev_printerr ("\n");
602	#else	709	#else
603	perror (msg);	710	perror (msg);
604	#endif	711	#endif
605	abort ();	712	abort ();
…		…
625	#endif	732	#endif
626	}	733	}
627		734
628	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	735	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
629		736
630	void	737	void ecb_cold
631	ev_set_allocator (void (cb)(void *ptr, long size))	738	ev_set_allocator (void (cb)(void *ptr, long size))
632	{	739	{
633	alloc = cb;	740	alloc = cb;
634	}	741	}
635		742
…		…
639	ptr = alloc (ptr, size);	746	ptr = alloc (ptr, size);
640		747
641	if (!ptr && size)	748	if (!ptr && size)
642	{	749	{
643	#if EV_AVOID_STDIO	750	#if EV_AVOID_STDIO
644	ev_printerr ("libev: memory allocation failed, aborting.\n");	751	ev_printerr ("(libev) memory allocation failed, aborting.\n");
645	#else	752	#else
646	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	753	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647	#endif	754	#endif
648	abort ();	755	abort ();
649	}	756	}
650		757
651	return ptr;	758	return ptr;
…		…
844	}	951	}
845		952
846	return ncur;	953	return ncur;
847	}	954	}
848		955
849	static noinline void *	956	static void * noinline ecb_cold
850	array_realloc (int elem, void base, int cur, int cnt)	957	array_realloc (int elem, void base, int cur, int cnt)
851	{	958	{
852	cur = array_nextsize (elem, cur, cnt);	959	cur = array_nextsize (elem, cur, cnt);
853	return ev_realloc (base, elem * *cur);	960	return ev_realloc (base, elem * *cur);
854	}	961	}
…		…
967	inline_size void	1074	inline_size void
968	fd_reify (EV_P)	1075	fd_reify (EV_P)
969	{	1076	{
970	int i;	1077	int i;
971		1078
		1079	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		1080	for (i = 0; i < fdchangecnt; ++i)
		1081	{
		1082	int fd = fdchanges [i];
		1083	ANFD *anfd = anfds + fd;
		1084
		1085	if (anfd->reify & EV__IOFDSET && anfd->head)
		1086	{
		1087	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1088
		1089	if (handle != anfd->handle)
		1090	{
		1091	unsigned long arg;
		1092
		1093	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1094
		1095	/* handle changed, but fd didn't - we need to do it in two steps */
		1096	backend_modify (EV_A_ fd, anfd->events, 0);
		1097	anfd->events = 0;
		1098	anfd->handle = handle;
		1099	}
		1100	}
		1101	}
		1102	#endif
		1103
972	for (i = 0; i < fdchangecnt; ++i)	1104	for (i = 0; i < fdchangecnt; ++i)
973	{	1105	{
974	int fd = fdchanges [i];	1106	int fd = fdchanges [i];
975	ANFD *anfd = anfds + fd;	1107	ANFD *anfd = anfds + fd;
976	ev_io *w;	1108	ev_io *w;
…		…
978	unsigned char o_events = anfd->events;	1110	unsigned char o_events = anfd->events;
979	unsigned char o_reify = anfd->reify;	1111	unsigned char o_reify = anfd->reify;
980		1112
981	anfd->reify = 0;	1113	anfd->reify = 0;
982		1114
983	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
984	if (o_reify & EV__IOFDSET)
985	{
986	unsigned long arg;
987	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989	printf ("oi %d %x\n", fd, anfd->handle);//D
990	}
991	#endif
992
993	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1115	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
994	{	1116	{
995	anfd->events = 0;	1117	anfd->events = 0;
996		1118
997	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	1119	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
1022	fdchanges [fdchangecnt - 1] = fd;	1144	fdchanges [fdchangecnt - 1] = fd;
1023	}	1145	}
1024	}	1146	}
1025		1147
1026	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1148	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027	inline_speed void	1149	inline_speed void ecb_cold
1028	fd_kill (EV_P_ int fd)	1150	fd_kill (EV_P_ int fd)
1029	{	1151	{
1030	ev_io *w;	1152	ev_io *w;
1031		1153
1032	while ((w = (ev_io *)anfds [fd].head))	1154	while ((w = (ev_io *)anfds [fd].head))
…		…
1035	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1157	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1036	}	1158	}
1037	}	1159	}
1038		1160
1039	/* check whether the given fd is actually valid, for error recovery */	1161	/* check whether the given fd is actually valid, for error recovery */
1040	inline_size int	1162	inline_size int ecb_cold
1041	fd_valid (int fd)	1163	fd_valid (int fd)
1042	{	1164	{
1043	#ifdef _WIN32	1165	#ifdef _WIN32
1044	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1166	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045	#else	1167	#else
1046	return fcntl (fd, F_GETFD) != -1;	1168	return fcntl (fd, F_GETFD) != -1;
1047	#endif	1169	#endif
1048	}	1170	}
1049		1171
1050	/* called on EBADF to verify fds */	1172	/* called on EBADF to verify fds */
1051	static void noinline	1173	static void noinline ecb_cold
1052	fd_ebadf (EV_P)	1174	fd_ebadf (EV_P)
1053	{	1175	{
1054	int fd;	1176	int fd;
1055		1177
1056	for (fd = 0; fd < anfdmax; ++fd)	1178	for (fd = 0; fd < anfdmax; ++fd)
…		…
1058	if (!fd_valid (fd) && errno == EBADF)	1180	if (!fd_valid (fd) && errno == EBADF)
1059	fd_kill (EV_A_ fd);	1181	fd_kill (EV_A_ fd);
1060	}	1182	}
1061		1183
1062	/* called on ENOMEM in select/poll to kill some fds and retry */	1184	/* called on ENOMEM in select/poll to kill some fds and retry */
1063	static void noinline	1185	static void noinline ecb_cold
1064	fd_enomem (EV_P)	1186	fd_enomem (EV_P)
1065	{	1187	{
1066	int fd;	1188	int fd;
1067		1189
1068	for (fd = anfdmax; fd--; )	1190	for (fd = anfdmax; fd--; )
…		…
1263		1385
1264	/*****************************************************************************/	1386	/*****************************************************************************/
1265		1387
1266	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1388	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1267		1389
1268	static void noinline	1390	static void noinline ecb_cold
1269	evpipe_init (EV_P)	1391	evpipe_init (EV_P)
1270	{	1392	{
1271	if (!ev_is_active (&pipe_w))	1393	if (!ev_is_active (&pipe_w))
1272	{	1394	{
1273	# if EV_USE_EVENTFD	1395	# if EV_USE_EVENTFD
…		…
1295	ev_io_start (EV_A_ &pipe_w);	1417	ev_io_start (EV_A_ &pipe_w);
1296	ev_unref (EV_A); /* watcher should not keep loop alive */	1418	ev_unref (EV_A); /* watcher should not keep loop alive */
1297	}	1419	}
1298	}	1420	}
1299		1421
1300	inline_size void	1422	inline_speed void
1301	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1423	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302	{	1424	{
1303	if (!*flag)	1425	if (!*flag)
1304	{	1426	{
1305	int old_errno = errno; /* save errno because write might clobber it */
1306	char dummy;
1307
1308	*flag = 1;	1427	*flag = 1;
1309		1428
		1429	pipe_write_skipped = 1;
		1430
		1431	if (pipe_write_wanted)
		1432	{
		1433	int old_errno;
		1434
		1435	pipe_write_skipped = 0;
		1436
		1437	old_errno = errno; /* save errno because write will clobber it */
		1438
1310	#if EV_USE_EVENTFD	1439	#if EV_USE_EVENTFD
1311	if (evfd >= 0)	1440	if (evfd >= 0)
1312	{	1441	{
1313	uint64_t counter = 1;	1442	uint64_t counter = 1;
1314	write (evfd, &counter, sizeof (uint64_t));	1443	write (evfd, &counter, sizeof (uint64_t));
		1444	}
		1445	else
		1446	#endif
		1447	{
		1448	/* win32 people keep sending patches that change this write() to send() */
		1449	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1450	/* so when you think this write should be a send instead, please find out */
		1451	/* where your send() is from - it's definitely not the microsoft send, and */
		1452	/* tell me. thank you. */
		1453	write (evpipe [1], &(evpipe [1]), 1);
		1454	}
		1455
		1456	errno = old_errno;
1315	}	1457	}
1316	else
1317	#endif
1318	/* win32 people keep sending patches that change this write() to send() */
1319	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320	/* so when you think this write should be a send instead, please find out */
1321	/* where your send() is from - it's definitely not the microsoft send, and */
1322	/* tell me. thank you. */
1323	write (evpipe [1], &dummy, 1);
1324
1325	errno = old_errno;
1326	}	1458	}
1327	}	1459	}
1328		1460
1329	/* called whenever the libev signal pipe */	1461	/* called whenever the libev signal pipe */
1330	/* got some events (signal, async) */	1462	/* got some events (signal, async) */
1331	static void	1463	static void
1332	pipecb (EV_P_ ev_io *iow, int revents)	1464	pipecb (EV_P_ ev_io *iow, int revents)
1333	{	1465	{
1334	int i;	1466	int i;
1335		1467
		1468	if (revents & EV_READ)
		1469	{
1336	#if EV_USE_EVENTFD	1470	#if EV_USE_EVENTFD
1337	if (evfd >= 0)	1471	if (evfd >= 0)
1338	{	1472	{
1339	uint64_t counter;	1473	uint64_t counter;
1340	read (evfd, &counter, sizeof (uint64_t));	1474	read (evfd, &counter, sizeof (uint64_t));
1341	}	1475	}
1342	else	1476	else
1343	#endif	1477	#endif
1344	{	1478	{
1345	char dummy;	1479	char dummy;
1346	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1480	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1347	read (evpipe [0], &dummy, 1);	1481	read (evpipe [0], &dummy, 1);
		1482	}
1348	}	1483	}
1349		1484
		1485	pipe_write_skipped = 0;
		1486
		1487	#if EV_SIGNAL_ENABLE
1350	if (sig_pending)	1488	if (sig_pending)
1351	{	1489	{
1352	sig_pending = 0;	1490	sig_pending = 0;
1353		1491
1354	for (i = EV_NSIG - 1; i--; )	1492	for (i = EV_NSIG - 1; i--; )
1355	if (expect_false (signals [i].pending))	1493	if (expect_false (signals [i].pending))
1356	ev_feed_signal_event (EV_A_ i + 1);	1494	ev_feed_signal_event (EV_A_ i + 1);
1357	}	1495	}
		1496	#endif
1358		1497
1359	#if EV_ASYNC_ENABLE	1498	#if EV_ASYNC_ENABLE
1360	if (async_pending)	1499	if (async_pending)
1361	{	1500	{
1362	async_pending = 0;	1501	async_pending = 0;
…		…
1371	#endif	1510	#endif
1372	}	1511	}
1373		1512
1374	/*****************************************************************************/	1513	/*****************************************************************************/
1375		1514
		1515	void
		1516	ev_feed_signal (int signum)
		1517	{
		1518	#if EV_MULTIPLICITY
		1519	EV_P = signals [signum - 1].loop;
		1520
		1521	if (!EV_A)
		1522	return;
		1523	#endif
		1524
		1525	evpipe_init (EV_A);
		1526
		1527	signals [signum - 1].pending = 1;
		1528	evpipe_write (EV_A_ &sig_pending);
		1529	}
		1530
1376	static void	1531	static void
1377	ev_sighandler (int signum)	1532	ev_sighandler (int signum)
1378	{	1533	{
1379	#if EV_MULTIPLICITY
1380	EV_P = signals [signum - 1].loop;
1381	#endif
1382
1383	#ifdef _WIN32	1534	#ifdef _WIN32
1384	signal (signum, ev_sighandler);	1535	signal (signum, ev_sighandler);
1385	#endif	1536	#endif
1386		1537
1387	signals [signum - 1].pending = 1;	1538	ev_feed_signal (signum);
1388	evpipe_write (EV_A_ &sig_pending);
1389	}	1539	}
1390		1540
1391	void noinline	1541	void noinline
1392	ev_feed_signal_event (EV_P_ int signum)	1542	ev_feed_signal_event (EV_P_ int signum)
1393	{	1543	{
…		…
1512	#endif	1662	#endif
1513	#if EV_USE_SELECT	1663	#if EV_USE_SELECT
1514	# include "ev_select.c"	1664	# include "ev_select.c"
1515	#endif	1665	#endif
1516		1666
1517	int	1667	int ecb_cold
1518	ev_version_major (void)	1668	ev_version_major (void)
1519	{	1669	{
1520	return EV_VERSION_MAJOR;	1670	return EV_VERSION_MAJOR;
1521	}	1671	}
1522		1672
1523	int	1673	int ecb_cold
1524	ev_version_minor (void)	1674	ev_version_minor (void)
1525	{	1675	{
1526	return EV_VERSION_MINOR;	1676	return EV_VERSION_MINOR;
1527	}	1677	}
1528		1678
1529	/* return true if we are running with elevated privileges and should ignore env variables */	1679	/* return true if we are running with elevated privileges and should ignore env variables */
1530	int inline_size	1680	int inline_size ecb_cold
1531	enable_secure (void)	1681	enable_secure (void)
1532	{	1682	{
1533	#ifdef _WIN32	1683	#ifdef _WIN32
1534	return 0;	1684	return 0;
1535	#else	1685	#else
1536	return getuid () != geteuid ()	1686	return getuid () != geteuid ()
1537	\|\| getgid () != getegid ();	1687	\|\| getgid () != getegid ();
1538	#endif	1688	#endif
1539	}	1689	}
1540		1690
1541	unsigned int	1691	unsigned int ecb_cold
1542	ev_supported_backends (void)	1692	ev_supported_backends (void)
1543	{	1693	{
1544	unsigned int flags = 0;	1694	unsigned int flags = 0;
1545		1695
1546	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1696	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1550	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1700	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1551		1701
1552	return flags;	1702	return flags;
1553	}	1703	}
1554		1704
1555	unsigned int	1705	unsigned int ecb_cold
1556	ev_recommended_backends (void)	1706	ev_recommended_backends (void)
1557	{	1707	{
1558	unsigned int flags = ev_supported_backends ();	1708	unsigned int flags = ev_supported_backends ();
1559		1709
1560	#ifndef __NetBSD__	1710	#ifndef __NetBSD__
…		…
1572	#endif	1722	#endif
1573		1723
1574	return flags;	1724	return flags;
1575	}	1725	}
1576		1726
1577	unsigned int	1727	unsigned int ecb_cold
1578	ev_embeddable_backends (void)	1728	ev_embeddable_backends (void)
1579	{	1729	{
1580	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1730	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1581		1731
1582	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1732	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1627	ev_userdata (EV_P)	1777	ev_userdata (EV_P)
1628	{	1778	{
1629	return userdata;	1779	return userdata;
1630	}	1780	}
1631		1781
		1782	void
1632	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1783	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633	{	1784	{
1634	invoke_cb = invoke_pending_cb;	1785	invoke_cb = invoke_pending_cb;
1635	}	1786	}
1636		1787
		1788	void
1637	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1789	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1638	{	1790	{
1639	release_cb = release;	1791	release_cb = release;
1640	acquire_cb = acquire;	1792	acquire_cb = acquire;
1641	}	1793	}
1642	#endif	1794	#endif
1643		1795
1644	/* initialise a loop structure, must be zero-initialised */	1796	/* initialise a loop structure, must be zero-initialised */
1645	static void noinline	1797	static void noinline ecb_cold
1646	loop_init (EV_P_ unsigned int flags)	1798	loop_init (EV_P_ unsigned int flags)
1647	{	1799	{
1648	if (!backend)	1800	if (!backend)
1649	{	1801	{
		1802	origflags = flags;
		1803
1650	#if EV_USE_REALTIME	1804	#if EV_USE_REALTIME
1651	if (!have_realtime)	1805	if (!have_realtime)
1652	{	1806	{
1653	struct timespec ts;	1807	struct timespec ts;
1654		1808
…		…
1676	if (!(flags & EVFLAG_NOENV)	1830	if (!(flags & EVFLAG_NOENV)
1677	&& !enable_secure ()	1831	&& !enable_secure ()
1678	&& getenv ("LIBEV_FLAGS"))	1832	&& getenv ("LIBEV_FLAGS"))
1679	flags = atoi (getenv ("LIBEV_FLAGS"));	1833	flags = atoi (getenv ("LIBEV_FLAGS"));
1680		1834
1681	ev_rt_now = ev_time ();	1835	ev_rt_now = ev_time ();
1682	mn_now = get_clock ();	1836	mn_now = get_clock ();
1683	now_floor = mn_now;	1837	now_floor = mn_now;
1684	rtmn_diff = ev_rt_now - mn_now;	1838	rtmn_diff = ev_rt_now - mn_now;
1685	#if EV_FEATURE_API	1839	#if EV_FEATURE_API
1686	invoke_cb = ev_invoke_pending;	1840	invoke_cb = ev_invoke_pending;
1687	#endif	1841	#endif
1688		1842
1689	io_blocktime = 0.;	1843	io_blocktime = 0.;
1690	timeout_blocktime = 0.;	1844	timeout_blocktime = 0.;
1691	backend = 0;	1845	backend = 0;
1692	backend_fd = -1;	1846	backend_fd = -1;
1693	sig_pending = 0;	1847	sig_pending = 0;
1694	#if EV_ASYNC_ENABLE	1848	#if EV_ASYNC_ENABLE
1695	async_pending = 0;	1849	async_pending = 0;
1696	#endif	1850	#endif
		1851	pipe_write_skipped = 0;
		1852	pipe_write_wanted = 0;
1697	#if EV_USE_INOTIFY	1853	#if EV_USE_INOTIFY
1698	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1854	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699	#endif	1855	#endif
1700	#if EV_USE_SIGNALFD	1856	#if EV_USE_SIGNALFD
1701	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1857	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702	#endif	1858	#endif
1703		1859
1704	if (!(flags & 0x0000ffffU))	1860	if (!(flags & EVBACKEND_MASK))
1705	flags \|= ev_recommended_backends ();	1861	flags \|= ev_recommended_backends ();
1706		1862
1707	#if EV_USE_IOCP	1863	#if EV_USE_IOCP
1708	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);	1864	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709	#endif	1865	#endif
…		…
1731	#endif	1887	#endif
1732	}	1888	}
1733	}	1889	}
1734		1890
1735	/* free up a loop structure */	1891	/* free up a loop structure */
1736	static void noinline	1892	void ecb_cold
1737	loop_destroy (EV_P)	1893	ev_loop_destroy (EV_P)
1738	{	1894	{
1739	int i;	1895	int i;
		1896
		1897	#if EV_MULTIPLICITY
		1898	/* mimic free (0) */
		1899	if (!EV_A)
		1900	return;
		1901	#endif
		1902
		1903	#if EV_CLEANUP_ENABLE
		1904	/* queue cleanup watchers (and execute them) */
		1905	if (expect_false (cleanupcnt))
		1906	{
		1907	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1908	EV_INVOKE_PENDING;
		1909	}
		1910	#endif
		1911
		1912	#if EV_CHILD_ENABLE
		1913	if (ev_is_active (&childev))
		1914	{
		1915	ev_ref (EV_A); /* child watcher */
		1916	ev_signal_stop (EV_A_ &childev);
		1917	}
		1918	#endif
1740		1919
1741	if (ev_is_active (&pipe_w))	1920	if (ev_is_active (&pipe_w))
1742	{	1921	{
1743	/ev_ref (EV_A);/	1922	/ev_ref (EV_A);/
1744	/ev_io_stop (EV_A_ &pipe_w);/	1923	/ev_io_stop (EV_A_ &pipe_w);/
…		…
1805	array_free (periodic, EMPTY);	1984	array_free (periodic, EMPTY);
1806	#endif	1985	#endif
1807	#if EV_FORK_ENABLE	1986	#if EV_FORK_ENABLE
1808	array_free (fork, EMPTY);	1987	array_free (fork, EMPTY);
1809	#endif	1988	#endif
		1989	#if EV_CLEANUP_ENABLE
		1990	array_free (cleanup, EMPTY);
		1991	#endif
1810	array_free (prepare, EMPTY);	1992	array_free (prepare, EMPTY);
1811	array_free (check, EMPTY);	1993	array_free (check, EMPTY);
1812	#if EV_ASYNC_ENABLE	1994	#if EV_ASYNC_ENABLE
1813	array_free (async, EMPTY);	1995	array_free (async, EMPTY);
1814	#endif	1996	#endif
1815		1997
1816	backend = 0;	1998	backend = 0;
		1999
		2000	#if EV_MULTIPLICITY
		2001	if (ev_is_default_loop (EV_A))
		2002	#endif
		2003	ev_default_loop_ptr = 0;
		2004	#if EV_MULTIPLICITY
		2005	else
		2006	ev_free (EV_A);
		2007	#endif
1817	}	2008	}
1818		2009
1819	#if EV_USE_INOTIFY	2010	#if EV_USE_INOTIFY
1820	inline_size void infy_fork (EV_P);	2011	inline_size void infy_fork (EV_P);
1821	#endif	2012	#endif
…		…
1836	infy_fork (EV_A);	2027	infy_fork (EV_A);
1837	#endif	2028	#endif
1838		2029
1839	if (ev_is_active (&pipe_w))	2030	if (ev_is_active (&pipe_w))
1840	{	2031	{
1841	/* this "locks" the handlers against writing to the pipe */	2032	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1842	/* while we modify the fd vars */
1843	sig_pending = 1;
1844	#if EV_ASYNC_ENABLE
1845	async_pending = 1;
1846	#endif
1847		2033
1848	ev_ref (EV_A);	2034	ev_ref (EV_A);
1849	ev_io_stop (EV_A_ &pipe_w);	2035	ev_io_stop (EV_A_ &pipe_w);
1850		2036
1851	#if EV_USE_EVENTFD	2037	#if EV_USE_EVENTFD
…		…
1869	postfork = 0;	2055	postfork = 0;
1870	}	2056	}
1871		2057
1872	#if EV_MULTIPLICITY	2058	#if EV_MULTIPLICITY
1873		2059
1874	struct ev_loop *	2060	struct ev_loop * ecb_cold
1875	ev_loop_new (unsigned int flags)	2061	ev_loop_new (unsigned int flags)
1876	{	2062	{
1877	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2063	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1878		2064
1879	memset (EV_A, 0, sizeof (struct ev_loop));	2065	memset (EV_A, 0, sizeof (struct ev_loop));
1880	loop_init (EV_A_ flags);	2066	loop_init (EV_A_ flags);
1881		2067
1882	if (ev_backend (EV_A))	2068	if (ev_backend (EV_A))
1883	return EV_A;	2069	return EV_A;
1884		2070
		2071	ev_free (EV_A);
1885	return 0;	2072	return 0;
1886	}	2073	}
1887		2074
1888	void
1889	ev_loop_destroy (EV_P)
1890	{
1891	loop_destroy (EV_A);
1892	ev_free (loop);
1893	}
1894
1895	void
1896	ev_loop_fork (EV_P)
1897	{
1898	postfork = 1; /* must be in line with ev_default_fork */
1899	}
1900	#endif /* multiplicity */	2075	#endif /* multiplicity */
1901		2076
1902	#if EV_VERIFY	2077	#if EV_VERIFY
1903	static void noinline	2078	static void noinline ecb_cold
1904	verify_watcher (EV_P_ W w)	2079	verify_watcher (EV_P_ W w)
1905	{	2080	{
1906	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2081	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1907		2082
1908	if (w->pending)	2083	if (w->pending)
1909	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2084	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1910	}	2085	}
1911		2086
1912	static void noinline	2087	static void noinline ecb_cold
1913	verify_heap (EV_P_ ANHE *heap, int N)	2088	verify_heap (EV_P_ ANHE *heap, int N)
1914	{	2089	{
1915	int i;	2090	int i;
1916		2091
1917	for (i = HEAP0; i < N + HEAP0; ++i)	2092	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1922		2097
1923	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2098	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1924	}	2099	}
1925	}	2100	}
1926		2101
1927	static void noinline	2102	static void noinline ecb_cold
1928	array_verify (EV_P_ W *ws, int cnt)	2103	array_verify (EV_P_ W *ws, int cnt)
1929	{	2104	{
1930	while (cnt--)	2105	while (cnt--)
1931	{	2106	{
1932	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2107	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1934	}	2109	}
1935	}	2110	}
1936	#endif	2111	#endif
1937		2112
1938	#if EV_FEATURE_API	2113	#if EV_FEATURE_API
1939	void	2114	void ecb_cold
1940	ev_verify (EV_P)	2115	ev_verify (EV_P)
1941	{	2116	{
1942	#if EV_VERIFY	2117	#if EV_VERIFY
1943	int i;	2118	int i;
1944	WL w;	2119	WL w;
…		…
1979	#if EV_FORK_ENABLE	2154	#if EV_FORK_ENABLE
1980	assert (forkmax >= forkcnt);	2155	assert (forkmax >= forkcnt);
1981	array_verify (EV_A_ (W *)forks, forkcnt);	2156	array_verify (EV_A_ (W *)forks, forkcnt);
1982	#endif	2157	#endif
1983		2158
		2159	#if EV_CLEANUP_ENABLE
		2160	assert (cleanupmax >= cleanupcnt);
		2161	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2162	#endif
		2163
1984	#if EV_ASYNC_ENABLE	2164	#if EV_ASYNC_ENABLE
1985	assert (asyncmax >= asynccnt);	2165	assert (asyncmax >= asynccnt);
1986	array_verify (EV_A_ (W *)asyncs, asynccnt);	2166	array_verify (EV_A_ (W *)asyncs, asynccnt);
1987	#endif	2167	#endif
1988		2168
…		…
2005	#endif	2185	#endif
2006	}	2186	}
2007	#endif	2187	#endif
2008		2188
2009	#if EV_MULTIPLICITY	2189	#if EV_MULTIPLICITY
2010	struct ev_loop *	2190	struct ev_loop * ecb_cold
2011	#else	2191	#else
2012	int	2192	int
2013	#endif	2193	#endif
2014	ev_default_loop (unsigned int flags)	2194	ev_default_loop (unsigned int flags)
2015	{	2195	{
…		…
2038		2218
2039	return ev_default_loop_ptr;	2219	return ev_default_loop_ptr;
2040	}	2220	}
2041		2221
2042	void	2222	void
2043	ev_default_destroy (void)	2223	ev_loop_fork (EV_P)
2044	{	2224	{
2045	#if EV_MULTIPLICITY
2046	EV_P = ev_default_loop_ptr;
2047	#endif
2048
2049	ev_default_loop_ptr = 0;
2050
2051	#if EV_CHILD_ENABLE
2052	ev_ref (EV_A); /* child watcher */
2053	ev_signal_stop (EV_A_ &childev);
2054	#endif
2055
2056	loop_destroy (EV_A);
2057	}
2058
2059	void
2060	ev_default_fork (void)
2061	{
2062	#if EV_MULTIPLICITY
2063	EV_P = ev_default_loop_ptr;
2064	#endif
2065
2066	postfork = 1; /* must be in line with ev_loop_fork */	2225	postfork = 1; /* must be in line with ev_default_fork */
2067	}	2226	}
2068		2227
2069	/*****************************************************************************/	2228	/*****************************************************************************/
2070		2229
2071	void	2230	void
…		…
2093		2252
2094	for (pri = NUMPRI; pri--; )	2253	for (pri = NUMPRI; pri--; )
2095	while (pendingcnt [pri])	2254	while (pendingcnt [pri])
2096	{	2255	{
2097	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2256	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2098
2099	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2100	/* ^ this is no longer true, as pending_w could be here */
2101		2257
2102	p->w->pending = 0;	2258	p->w->pending = 0;
2103	EV_CB_INVOKE (p->w, p->events);	2259	EV_CB_INVOKE (p->w, p->events);
2104	EV_FREQUENT_CHECK;	2260	EV_FREQUENT_CHECK;
2105	}	2261	}
…		…
2167	feed_reverse_done (EV_A_ EV_TIMER);	2323	feed_reverse_done (EV_A_ EV_TIMER);
2168	}	2324	}
2169	}	2325	}
2170		2326
2171	#if EV_PERIODIC_ENABLE	2327	#if EV_PERIODIC_ENABLE
		2328
		2329	static void noinline
		2330	periodic_recalc (EV_P_ ev_periodic *w)
		2331	{
		2332	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2333	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2334
		2335	/* the above almost always errs on the low side */
		2336	while (at <= ev_rt_now)
		2337	{
		2338	ev_tstamp nat = at + w->interval;
		2339
		2340	/* when resolution fails us, we use ev_rt_now */
		2341	if (expect_false (nat == at))
		2342	{
		2343	at = ev_rt_now;
		2344	break;
		2345	}
		2346
		2347	at = nat;
		2348	}
		2349
		2350	ev_at (w) = at;
		2351	}
		2352
2172	/* make periodics pending */	2353	/* make periodics pending */
2173	inline_size void	2354	inline_size void
2174	periodics_reify (EV_P)	2355	periodics_reify (EV_P)
2175	{	2356	{
2176	EV_FREQUENT_CHECK;	2357	EV_FREQUENT_CHECK;
…		…
2195	ANHE_at_cache (periodics [HEAP0]);	2376	ANHE_at_cache (periodics [HEAP0]);
2196	downheap (periodics, periodiccnt, HEAP0);	2377	downheap (periodics, periodiccnt, HEAP0);
2197	}	2378	}
2198	else if (w->interval)	2379	else if (w->interval)
2199	{	2380	{
2200	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2381	periodic_recalc (EV_A_ w);
2201	/* if next trigger time is not sufficiently in the future, put it there */
2202	/* this might happen because of floating point inexactness */
2203	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2204	{
2205	ev_at (w) += w->interval;
2206
2207	/* if interval is unreasonably low we might still have a time in the past */
2208	/* so correct this. this will make the periodic very inexact, but the user */
2209	/* has effectively asked to get triggered more often than possible */
2210	if (ev_at (w) < ev_rt_now)
2211	ev_at (w) = ev_rt_now;
2212	}
2213
2214	ANHE_at_cache (periodics [HEAP0]);	2382	ANHE_at_cache (periodics [HEAP0]);
2215	downheap (periodics, periodiccnt, HEAP0);	2383	downheap (periodics, periodiccnt, HEAP0);
2216	}	2384	}
2217	else	2385	else
2218	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2386	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2226	}	2394	}
2227	}	2395	}
2228		2396
2229	/* simply recalculate all periodics */	2397	/* simply recalculate all periodics */
2230	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2398	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2231	static void noinline	2399	static void noinline ecb_cold
2232	periodics_reschedule (EV_P)	2400	periodics_reschedule (EV_P)
2233	{	2401	{
2234	int i;	2402	int i;
2235		2403
2236	/* adjust periodics after time jump */	2404	/* adjust periodics after time jump */
…		…
2239	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2407	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2240		2408
2241	if (w->reschedule_cb)	2409	if (w->reschedule_cb)
2242	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2410	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2243	else if (w->interval)	2411	else if (w->interval)
2244	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2412	periodic_recalc (EV_A_ w);
2245		2413
2246	ANHE_at_cache (periodics [i]);	2414	ANHE_at_cache (periodics [i]);
2247	}	2415	}
2248		2416
2249	reheap (periodics, periodiccnt);	2417	reheap (periodics, periodiccnt);
2250	}	2418	}
2251	#endif	2419	#endif
2252		2420
2253	/* adjust all timers by a given offset */	2421	/* adjust all timers by a given offset */
2254	static void noinline	2422	static void noinline ecb_cold
2255	timers_reschedule (EV_P_ ev_tstamp adjust)	2423	timers_reschedule (EV_P_ ev_tstamp adjust)
2256	{	2424	{
2257	int i;	2425	int i;
2258		2426
2259	for (i = 0; i < timercnt; ++i)	2427	for (i = 0; i < timercnt; ++i)
…		…
2296	* doesn't hurt either as we only do this on time-jumps or	2464	* doesn't hurt either as we only do this on time-jumps or
2297	* in the unlikely event of having been preempted here.	2465	* in the unlikely event of having been preempted here.
2298	*/	2466	*/
2299	for (i = 4; --i; )	2467	for (i = 4; --i; )
2300	{	2468	{
		2469	ev_tstamp diff;
2301	rtmn_diff = ev_rt_now - mn_now;	2470	rtmn_diff = ev_rt_now - mn_now;
2302		2471
		2472	diff = odiff - rtmn_diff;
		2473
2303	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2474	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2304	return; /* all is well */	2475	return; /* all is well */
2305		2476
2306	ev_rt_now = ev_time ();	2477	ev_rt_now = ev_time ();
2307	mn_now = get_clock ();	2478	mn_now = get_clock ();
2308	now_floor = mn_now;	2479	now_floor = mn_now;
…		…
2398	ev_tstamp prev_mn_now = mn_now;	2569	ev_tstamp prev_mn_now = mn_now;
2399		2570
2400	/* update time to cancel out callback processing overhead */	2571	/* update time to cancel out callback processing overhead */
2401	time_update (EV_A_ 1e100);	2572	time_update (EV_A_ 1e100);
2402		2573
		2574	/* from now on, we want a pipe-wake-up */
		2575	pipe_write_wanted = 1;
		2576
2403	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2577	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2404	{	2578	{
2405	waittime = MAX_BLOCKTIME;	2579	waittime = MAX_BLOCKTIME;
2406		2580
2407	if (timercnt)	2581	if (timercnt)
2408	{	2582	{
2409	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2583	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2410	if (waittime > to) waittime = to;	2584	if (waittime > to) waittime = to;
2411	}	2585	}
2412		2586
2413	#if EV_PERIODIC_ENABLE	2587	#if EV_PERIODIC_ENABLE
2414	if (periodiccnt)	2588	if (periodiccnt)
2415	{	2589	{
2416	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2590	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2417	if (waittime > to) waittime = to;	2591	if (waittime > to) waittime = to;
2418	}	2592	}
2419	#endif	2593	#endif
2420		2594
2421	/* don't let timeouts decrease the waittime below timeout_blocktime */	2595	/* don't let timeouts decrease the waittime below timeout_blocktime */
2422	if (expect_false (waittime < timeout_blocktime))	2596	if (expect_false (waittime < timeout_blocktime))
2423	waittime = timeout_blocktime;	2597	waittime = timeout_blocktime;
		2598
		2599	/* at this point, we NEED to wait, so we have to ensure */
		2600	/* to pass a minimum nonzero value to the backend */
		2601	if (expect_false (waittime < backend_mintime))
		2602	waittime = backend_mintime;
2424		2603
2425	/* extra check because io_blocktime is commonly 0 */	2604	/* extra check because io_blocktime is commonly 0 */
2426	if (expect_false (io_blocktime))	2605	if (expect_false (io_blocktime))
2427	{	2606	{
2428	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2607	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2429		2608
2430	if (sleeptime > waittime - backend_fudge)	2609	if (sleeptime > waittime - backend_mintime)
2431	sleeptime = waittime - backend_fudge;	2610	sleeptime = waittime - backend_mintime;
2432		2611
2433	if (expect_true (sleeptime > 0.))	2612	if (expect_true (sleeptime > 0.))
2434	{	2613	{
2435	ev_sleep (sleeptime);	2614	ev_sleep (sleeptime);
2436	waittime -= sleeptime;	2615	waittime -= sleeptime;
…		…
2442	++loop_count;	2621	++loop_count;
2443	#endif	2622	#endif
2444	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2623	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2445	backend_poll (EV_A_ waittime);	2624	backend_poll (EV_A_ waittime);
2446	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2625	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2626
		2627	pipe_write_wanted = 0;
		2628
		2629	if (pipe_write_skipped)
		2630	{
		2631	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2632	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2633	}
		2634
2447		2635
2448	/* update ev_rt_now, do magic */	2636	/* update ev_rt_now, do magic */
2449	time_update (EV_A_ waittime + sleeptime);	2637	time_update (EV_A_ waittime + sleeptime);
2450	}	2638	}
2451		2639
…		…
2741	if (w->reschedule_cb)	2929	if (w->reschedule_cb)
2742	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2930	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2743	else if (w->interval)	2931	else if (w->interval)
2744	{	2932	{
2745	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2933	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2746	/* this formula differs from the one in periodic_reify because we do not always round up */	2934	periodic_recalc (EV_A_ w);
2747	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2748	}	2935	}
2749	else	2936	else
2750	ev_at (w) = w->offset;	2937	ev_at (w) = w->offset;
2751		2938
2752	EV_FREQUENT_CHECK;	2939	EV_FREQUENT_CHECK;
…		…
2873	sa.sa_handler = ev_sighandler;	3060	sa.sa_handler = ev_sighandler;
2874	sigfillset (&sa.sa_mask);	3061	sigfillset (&sa.sa_mask);
2875	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3062	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2876	sigaction (w->signum, &sa, 0);	3063	sigaction (w->signum, &sa, 0);
2877		3064
		3065	if (origflags & EVFLAG_NOSIGMASK)
		3066	{
2878	sigemptyset (&sa.sa_mask);	3067	sigemptyset (&sa.sa_mask);
2879	sigaddset (&sa.sa_mask, w->signum);	3068	sigaddset (&sa.sa_mask, w->signum);
2880	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3069	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3070	}
2881	#endif	3071	#endif
2882	}	3072	}
2883		3073
2884	EV_FREQUENT_CHECK;	3074	EV_FREQUENT_CHECK;
2885	}	3075	}
…		…
3026	if (!pend \|\| pend == path)	3216	if (!pend \|\| pend == path)
3027	break;	3217	break;
3028		3218
3029	*pend = 0;	3219	*pend = 0;
3030	w->wd = inotify_add_watch (fs_fd, path, mask);	3220	w->wd = inotify_add_watch (fs_fd, path, mask);
3031	}	3221	}
3032	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3222	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3033	}	3223	}
3034	}	3224	}
3035		3225
3036	if (w->wd >= 0)	3226	if (w->wd >= 0)
…		…
3103	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3293	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3104	ofs += sizeof (struct inotify_event) + ev->len;	3294	ofs += sizeof (struct inotify_event) + ev->len;
3105	}	3295	}
3106	}	3296	}
3107		3297
3108	inline_size void	3298	inline_size void ecb_cold
3109	ev_check_2625 (EV_P)	3299	ev_check_2625 (EV_P)
3110	{	3300	{
3111	/* kernels < 2.6.25 are borked	3301	/* kernels < 2.6.25 are borked
3112	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3302	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3113	*/	3303	*/
…		…
3577		3767
3578	EV_FREQUENT_CHECK;	3768	EV_FREQUENT_CHECK;
3579	}	3769	}
3580	#endif	3770	#endif
3581		3771
		3772	#if EV_CLEANUP_ENABLE
		3773	void
		3774	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3775	{
		3776	if (expect_false (ev_is_active (w)))
		3777	return;
		3778
		3779	EV_FREQUENT_CHECK;
		3780
		3781	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3782	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3783	cleanups [cleanupcnt - 1] = w;
		3784
		3785	/* cleanup watchers should never keep a refcount on the loop */
		3786	ev_unref (EV_A);
		3787	EV_FREQUENT_CHECK;
		3788	}
		3789
		3790	void
		3791	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3792	{
		3793	clear_pending (EV_A_ (W)w);
		3794	if (expect_false (!ev_is_active (w)))
		3795	return;
		3796
		3797	EV_FREQUENT_CHECK;
		3798	ev_ref (EV_A);
		3799
		3800	{
		3801	int active = ev_active (w);
		3802
		3803	cleanups [active - 1] = cleanups [--cleanupcnt];
		3804	ev_active (cleanups [active - 1]) = active;
		3805	}
		3806
		3807	ev_stop (EV_A_ (W)w);
		3808
		3809	EV_FREQUENT_CHECK;
		3810	}
		3811	#endif
		3812
3582	#if EV_ASYNC_ENABLE	3813	#if EV_ASYNC_ENABLE
3583	void	3814	void
3584	ev_async_start (EV_P_ ev_async *w)	3815	ev_async_start (EV_P_ ev_async *w)
3585	{	3816	{
3586	if (expect_false (ev_is_active (w)))	3817	if (expect_false (ev_is_active (w)))
…		…
3697	}	3928	}
3698		3929
3699	/*****************************************************************************/	3930	/*****************************************************************************/
3700		3931
3701	#if EV_WALK_ENABLE	3932	#if EV_WALK_ENABLE
3702	void	3933	void ecb_cold
3703	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3934	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3704	{	3935	{
3705	int i, j;	3936	int i, j;
3706	ev_watcher_list wl, wn;	3937	ev_watcher_list wl, wn;
3707		3938

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Comparing libev/ev.c (file contents): Revision 1.358 by root, Sun Oct 24 14:44:40 2010 UTC vs. Revision 1.380 by root, Mon Jun 27 19:20:01 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.358 by root, Sun Oct 24 14:44:40 2010 UTC vs.
Revision 1.380 by root, Mon Jun 27 19:20:01 2011 UTC