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

Comparing libev/ev.c (file contents):
Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC vs.
Revision 1.379 by root, Sun Jun 19 17:55:13 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;
…		…
668	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	775	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
669	unsigned char unused;	776	unsigned char unused;
670	#if EV_USE_EPOLL	777	#if EV_USE_EPOLL
671	unsigned int egen; /* generation counter to counter epoll bugs */	778	unsigned int egen; /* generation counter to counter epoll bugs */
672	#endif	779	#endif
673	#if EV_SELECT_IS_WINSOCKET	780	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
674	SOCKET handle;	781	SOCKET handle;
		782	#endif
		783	#if EV_USE_IOCP
		784	OVERLAPPED or, ow;
675	#endif	785	#endif
676	} ANFD;	786	} ANFD;
677		787
678	/* stores the pending event set for a given watcher */	788	/* stores the pending event set for a given watcher */
679	typedef struct	789	typedef struct
…		…
841	}	951	}
842		952
843	return ncur;	953	return ncur;
844	}	954	}
845		955
846	static noinline void *	956	static void * noinline ecb_cold
847	array_realloc (int elem, void base, int cur, int cnt)	957	array_realloc (int elem, void base, int cur, int cnt)
848	{	958	{
849	cur = array_nextsize (elem, cur, cnt);	959	cur = array_nextsize (elem, cur, cnt);
850	return ev_realloc (base, elem * *cur);	960	return ev_realloc (base, elem * *cur);
851	}	961	}
…		…
964	inline_size void	1074	inline_size void
965	fd_reify (EV_P)	1075	fd_reify (EV_P)
966	{	1076	{
967	int i;	1077	int i;
968		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
969	for (i = 0; i < fdchangecnt; ++i)	1104	for (i = 0; i < fdchangecnt; ++i)
970	{	1105	{
971	int fd = fdchanges [i];	1106	int fd = fdchanges [i];
972	ANFD *anfd = anfds + fd;	1107	ANFD *anfd = anfds + fd;
973	ev_io *w;	1108	ev_io *w;
…		…
975	unsigned char o_events = anfd->events;	1110	unsigned char o_events = anfd->events;
976	unsigned char o_reify = anfd->reify;	1111	unsigned char o_reify = anfd->reify;
977		1112
978	anfd->reify = 0;	1113	anfd->reify = 0;
979		1114
980	#if EV_SELECT_IS_WINSOCKET
981	if (o_reify & EV__IOFDSET)
982	{
983	unsigned long arg;
984	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
985	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
986	}
987	#endif
988
989	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /	1115	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
990	{	1116	{
991	anfd->events = 0;	1117	anfd->events = 0;
992		1118
993	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)
…		…
1018	fdchanges [fdchangecnt - 1] = fd;	1144	fdchanges [fdchangecnt - 1] = fd;
1019	}	1145	}
1020	}	1146	}
1021		1147
1022	/* 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 */
1023	inline_speed void	1149	inline_speed void ecb_cold
1024	fd_kill (EV_P_ int fd)	1150	fd_kill (EV_P_ int fd)
1025	{	1151	{
1026	ev_io *w;	1152	ev_io *w;
1027		1153
1028	while ((w = (ev_io *)anfds [fd].head))	1154	while ((w = (ev_io *)anfds [fd].head))
…		…
1031	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);
1032	}	1158	}
1033	}	1159	}
1034		1160
1035	/* check whether the given fd is actually valid, for error recovery */	1161	/* check whether the given fd is actually valid, for error recovery */
1036	inline_size int	1162	inline_size int ecb_cold
1037	fd_valid (int fd)	1163	fd_valid (int fd)
1038	{	1164	{
1039	#ifdef _WIN32	1165	#ifdef _WIN32
1040	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1166	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1041	#else	1167	#else
1042	return fcntl (fd, F_GETFD) != -1;	1168	return fcntl (fd, F_GETFD) != -1;
1043	#endif	1169	#endif
1044	}	1170	}
1045		1171
1046	/* called on EBADF to verify fds */	1172	/* called on EBADF to verify fds */
1047	static void noinline	1173	static void noinline ecb_cold
1048	fd_ebadf (EV_P)	1174	fd_ebadf (EV_P)
1049	{	1175	{
1050	int fd;	1176	int fd;
1051		1177
1052	for (fd = 0; fd < anfdmax; ++fd)	1178	for (fd = 0; fd < anfdmax; ++fd)
…		…
1054	if (!fd_valid (fd) && errno == EBADF)	1180	if (!fd_valid (fd) && errno == EBADF)
1055	fd_kill (EV_A_ fd);	1181	fd_kill (EV_A_ fd);
1056	}	1182	}
1057		1183
1058	/* 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 */
1059	static void noinline	1185	static void noinline ecb_cold
1060	fd_enomem (EV_P)	1186	fd_enomem (EV_P)
1061	{	1187	{
1062	int fd;	1188	int fd;
1063		1189
1064	for (fd = anfdmax; fd--; )	1190	for (fd = anfdmax; fd--; )
…		…
1259		1385
1260	/*****************************************************************************/	1386	/*****************************************************************************/
1261		1387
1262	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1388	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1263		1389
1264	static void noinline	1390	static void noinline ecb_cold
1265	evpipe_init (EV_P)	1391	evpipe_init (EV_P)
1266	{	1392	{
1267	if (!ev_is_active (&pipe_w))	1393	if (!ev_is_active (&pipe_w))
1268	{	1394	{
1269	# if EV_USE_EVENTFD	1395	# if EV_USE_EVENTFD
…		…
1296	inline_size void	1422	inline_size void
1297	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1423	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1298	{	1424	{
1299	if (!*flag)	1425	if (!*flag)
1300	{	1426	{
1301	int old_errno = errno; /* save errno because write might clobber it */
1302	char dummy;
1303
1304	*flag = 1;	1427	*flag = 1;
1305		1428
		1429	pipe_write_skipped = 1;
		1430
		1431	if (pipe_write_wanted)
		1432	{
		1433	int old_errno = errno; /* save errno because write will clobber it */
		1434	char dummy;
		1435
		1436	pipe_write_skipped = 0;
		1437
1306	#if EV_USE_EVENTFD	1438	#if EV_USE_EVENTFD
1307	if (evfd >= 0)	1439	if (evfd >= 0)
1308	{	1440	{
1309	uint64_t counter = 1;	1441	uint64_t counter = 1;
1310	write (evfd, &counter, sizeof (uint64_t));	1442	write (evfd, &counter, sizeof (uint64_t));
		1443	}
		1444	else
		1445	#endif
		1446	{
		1447	/* win32 people keep sending patches that change this write() to send() */
		1448	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1449	/* so when you think this write should be a send instead, please find out */
		1450	/* where your send() is from - it's definitely not the microsoft send, and */
		1451	/* tell me. thank you. */
		1452	write (evpipe [1], &dummy, 1);
		1453	}
		1454
		1455	errno = old_errno;
1311	}	1456	}
1312	else
1313	#endif
1314	/* win32 people keep sending patches that change this write() to send() */
1315	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1316	/* so when you think this write should be a send instead, please find out */
1317	/* where your send() is from - it's definitely not the microsoft send, and */
1318	/* tell me. thank you. */
1319	write (evpipe [1], &dummy, 1);
1320
1321	errno = old_errno;
1322	}	1457	}
1323	}	1458	}
1324		1459
1325	/* called whenever the libev signal pipe */	1460	/* called whenever the libev signal pipe */
1326	/* got some events (signal, async) */	1461	/* got some events (signal, async) */
1327	static void	1462	static void
1328	pipecb (EV_P_ ev_io *iow, int revents)	1463	pipecb (EV_P_ ev_io *iow, int revents)
1329	{	1464	{
1330	int i;	1465	int i;
1331		1466
		1467	if (revents & EV_READ)
		1468	{
1332	#if EV_USE_EVENTFD	1469	#if EV_USE_EVENTFD
1333	if (evfd >= 0)	1470	if (evfd >= 0)
1334	{	1471	{
1335	uint64_t counter;	1472	uint64_t counter;
1336	read (evfd, &counter, sizeof (uint64_t));	1473	read (evfd, &counter, sizeof (uint64_t));
1337	}	1474	}
1338	else	1475	else
1339	#endif	1476	#endif
1340	{	1477	{
1341	char dummy;	1478	char dummy;
1342	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1479	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1343	read (evpipe [0], &dummy, 1);	1480	read (evpipe [0], &dummy, 1);
		1481	}
1344	}	1482	}
1345		1483
		1484	pipe_write_skipped = 0;
		1485
		1486	#if EV_SIGNAL_ENABLE
1346	if (sig_pending)	1487	if (sig_pending)
1347	{	1488	{
1348	sig_pending = 0;	1489	sig_pending = 0;
1349		1490
1350	for (i = EV_NSIG - 1; i--; )	1491	for (i = EV_NSIG - 1; i--; )
1351	if (expect_false (signals [i].pending))	1492	if (expect_false (signals [i].pending))
1352	ev_feed_signal_event (EV_A_ i + 1);	1493	ev_feed_signal_event (EV_A_ i + 1);
1353	}	1494	}
		1495	#endif
1354		1496
1355	#if EV_ASYNC_ENABLE	1497	#if EV_ASYNC_ENABLE
1356	if (async_pending)	1498	if (async_pending)
1357	{	1499	{
1358	async_pending = 0;	1500	async_pending = 0;
…		…
1367	#endif	1509	#endif
1368	}	1510	}
1369		1511
1370	/*****************************************************************************/	1512	/*****************************************************************************/
1371		1513
		1514	void
		1515	ev_feed_signal (int signum)
		1516	{
		1517	#if EV_MULTIPLICITY
		1518	EV_P = signals [signum - 1].loop;
		1519
		1520	if (!EV_A)
		1521	return;
		1522	#endif
		1523
		1524	evpipe_init (EV_A);
		1525
		1526	signals [signum - 1].pending = 1;
		1527	evpipe_write (EV_A_ &sig_pending);
		1528	}
		1529
1372	static void	1530	static void
1373	ev_sighandler (int signum)	1531	ev_sighandler (int signum)
1374	{	1532	{
1375	#if EV_MULTIPLICITY
1376	EV_P = signals [signum - 1].loop;
1377	#endif
1378
1379	#ifdef _WIN32	1533	#ifdef _WIN32
1380	signal (signum, ev_sighandler);	1534	signal (signum, ev_sighandler);
1381	#endif	1535	#endif
1382		1536
1383	signals [signum - 1].pending = 1;	1537	ev_feed_signal (signum);
1384	evpipe_write (EV_A_ &sig_pending);
1385	}	1538	}
1386		1539
1387	void noinline	1540	void noinline
1388	ev_feed_signal_event (EV_P_ int signum)	1541	ev_feed_signal_event (EV_P_ int signum)
1389	{	1542	{
…		…
1489		1642
1490	#endif	1643	#endif
1491		1644
1492	/*****************************************************************************/	1645	/*****************************************************************************/
1493		1646
		1647	#if EV_USE_IOCP
		1648	# include "ev_iocp.c"
		1649	#endif
1494	#if EV_USE_PORT	1650	#if EV_USE_PORT
1495	# include "ev_port.c"	1651	# include "ev_port.c"
1496	#endif	1652	#endif
1497	#if EV_USE_KQUEUE	1653	#if EV_USE_KQUEUE
1498	# include "ev_kqueue.c"	1654	# include "ev_kqueue.c"
…		…
1505	#endif	1661	#endif
1506	#if EV_USE_SELECT	1662	#if EV_USE_SELECT
1507	# include "ev_select.c"	1663	# include "ev_select.c"
1508	#endif	1664	#endif
1509		1665
1510	int	1666	int ecb_cold
1511	ev_version_major (void)	1667	ev_version_major (void)
1512	{	1668	{
1513	return EV_VERSION_MAJOR;	1669	return EV_VERSION_MAJOR;
1514	}	1670	}
1515		1671
1516	int	1672	int ecb_cold
1517	ev_version_minor (void)	1673	ev_version_minor (void)
1518	{	1674	{
1519	return EV_VERSION_MINOR;	1675	return EV_VERSION_MINOR;
1520	}	1676	}
1521		1677
1522	/* return true if we are running with elevated privileges and should ignore env variables */	1678	/* return true if we are running with elevated privileges and should ignore env variables */
1523	int inline_size	1679	int inline_size ecb_cold
1524	enable_secure (void)	1680	enable_secure (void)
1525	{	1681	{
1526	#ifdef _WIN32	1682	#ifdef _WIN32
1527	return 0;	1683	return 0;
1528	#else	1684	#else
1529	return getuid () != geteuid ()	1685	return getuid () != geteuid ()
1530	\|\| getgid () != getegid ();	1686	\|\| getgid () != getegid ();
1531	#endif	1687	#endif
1532	}	1688	}
1533		1689
1534	unsigned int	1690	unsigned int ecb_cold
1535	ev_supported_backends (void)	1691	ev_supported_backends (void)
1536	{	1692	{
1537	unsigned int flags = 0;	1693	unsigned int flags = 0;
1538		1694
1539	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1695	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1543	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1699	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1544		1700
1545	return flags;	1701	return flags;
1546	}	1702	}
1547		1703
1548	unsigned int	1704	unsigned int ecb_cold
1549	ev_recommended_backends (void)	1705	ev_recommended_backends (void)
1550	{	1706	{
1551	unsigned int flags = ev_supported_backends ();	1707	unsigned int flags = ev_supported_backends ();
1552		1708
1553	#ifndef __NetBSD__	1709	#ifndef __NetBSD__
…		…
1565	#endif	1721	#endif
1566		1722
1567	return flags;	1723	return flags;
1568	}	1724	}
1569		1725
1570	unsigned int	1726	unsigned int ecb_cold
1571	ev_embeddable_backends (void)	1727	ev_embeddable_backends (void)
1572	{	1728	{
1573	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1729	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1574		1730
1575	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1731	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1620	ev_userdata (EV_P)	1776	ev_userdata (EV_P)
1621	{	1777	{
1622	return userdata;	1778	return userdata;
1623	}	1779	}
1624		1780
		1781	void
1625	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1782	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1626	{	1783	{
1627	invoke_cb = invoke_pending_cb;	1784	invoke_cb = invoke_pending_cb;
1628	}	1785	}
1629		1786
		1787	void
1630	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1788	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1631	{	1789	{
1632	release_cb = release;	1790	release_cb = release;
1633	acquire_cb = acquire;	1791	acquire_cb = acquire;
1634	}	1792	}
1635	#endif	1793	#endif
1636		1794
1637	/* initialise a loop structure, must be zero-initialised */	1795	/* initialise a loop structure, must be zero-initialised */
1638	static void noinline	1796	static void noinline ecb_cold
1639	loop_init (EV_P_ unsigned int flags)	1797	loop_init (EV_P_ unsigned int flags)
1640	{	1798	{
1641	if (!backend)	1799	if (!backend)
1642	{	1800	{
		1801	origflags = flags;
		1802
1643	#if EV_USE_REALTIME	1803	#if EV_USE_REALTIME
1644	if (!have_realtime)	1804	if (!have_realtime)
1645	{	1805	{
1646	struct timespec ts;	1806	struct timespec ts;
1647		1807
…		…
1669	if (!(flags & EVFLAG_NOENV)	1829	if (!(flags & EVFLAG_NOENV)
1670	&& !enable_secure ()	1830	&& !enable_secure ()
1671	&& getenv ("LIBEV_FLAGS"))	1831	&& getenv ("LIBEV_FLAGS"))
1672	flags = atoi (getenv ("LIBEV_FLAGS"));	1832	flags = atoi (getenv ("LIBEV_FLAGS"));
1673		1833
1674	ev_rt_now = ev_time ();	1834	ev_rt_now = ev_time ();
1675	mn_now = get_clock ();	1835	mn_now = get_clock ();
1676	now_floor = mn_now;	1836	now_floor = mn_now;
1677	rtmn_diff = ev_rt_now - mn_now;	1837	rtmn_diff = ev_rt_now - mn_now;
1678	#if EV_FEATURE_API	1838	#if EV_FEATURE_API
1679	invoke_cb = ev_invoke_pending;	1839	invoke_cb = ev_invoke_pending;
1680	#endif	1840	#endif
1681		1841
1682	io_blocktime = 0.;	1842	io_blocktime = 0.;
1683	timeout_blocktime = 0.;	1843	timeout_blocktime = 0.;
1684	backend = 0;	1844	backend = 0;
1685	backend_fd = -1;	1845	backend_fd = -1;
1686	sig_pending = 0;	1846	sig_pending = 0;
1687	#if EV_ASYNC_ENABLE	1847	#if EV_ASYNC_ENABLE
1688	async_pending = 0;	1848	async_pending = 0;
1689	#endif	1849	#endif
		1850	pipe_write_skipped = 0;
		1851	pipe_write_wanted = 0;
1690	#if EV_USE_INOTIFY	1852	#if EV_USE_INOTIFY
1691	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1853	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1692	#endif	1854	#endif
1693	#if EV_USE_SIGNALFD	1855	#if EV_USE_SIGNALFD
1694	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1856	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1695	#endif	1857	#endif
1696		1858
1697	if (!(flags & 0x0000ffffU))	1859	if (!(flags & EVBACKEND_MASK))
1698	flags \|= ev_recommended_backends ();	1860	flags \|= ev_recommended_backends ();
1699		1861
		1862	#if EV_USE_IOCP
		1863	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1864	#endif
1700	#if EV_USE_PORT	1865	#if EV_USE_PORT
1701	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1866	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1702	#endif	1867	#endif
1703	#if EV_USE_KQUEUE	1868	#if EV_USE_KQUEUE
1704	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1869	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1721	#endif	1886	#endif
1722	}	1887	}
1723	}	1888	}
1724		1889
1725	/* free up a loop structure */	1890	/* free up a loop structure */
1726	static void noinline	1891	void ecb_cold
1727	loop_destroy (EV_P)	1892	ev_loop_destroy (EV_P)
1728	{	1893	{
1729	int i;	1894	int i;
		1895
		1896	#if EV_MULTIPLICITY
		1897	/* mimic free (0) */
		1898	if (!EV_A)
		1899	return;
		1900	#endif
		1901
		1902	#if EV_CLEANUP_ENABLE
		1903	/* queue cleanup watchers (and execute them) */
		1904	if (expect_false (cleanupcnt))
		1905	{
		1906	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1907	EV_INVOKE_PENDING;
		1908	}
		1909	#endif
		1910
		1911	#if EV_CHILD_ENABLE
		1912	if (ev_is_active (&childev))
		1913	{
		1914	ev_ref (EV_A); /* child watcher */
		1915	ev_signal_stop (EV_A_ &childev);
		1916	}
		1917	#endif
1730		1918
1731	if (ev_is_active (&pipe_w))	1919	if (ev_is_active (&pipe_w))
1732	{	1920	{
1733	/ev_ref (EV_A);/	1921	/ev_ref (EV_A);/
1734	/ev_io_stop (EV_A_ &pipe_w);/	1922	/ev_io_stop (EV_A_ &pipe_w);/
…		…
1756	#endif	1944	#endif
1757		1945
1758	if (backend_fd >= 0)	1946	if (backend_fd >= 0)
1759	close (backend_fd);	1947	close (backend_fd);
1760		1948
		1949	#if EV_USE_IOCP
		1950	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1951	#endif
1761	#if EV_USE_PORT	1952	#if EV_USE_PORT
1762	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1953	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1763	#endif	1954	#endif
1764	#if EV_USE_KQUEUE	1955	#if EV_USE_KQUEUE
1765	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1956	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1792	array_free (periodic, EMPTY);	1983	array_free (periodic, EMPTY);
1793	#endif	1984	#endif
1794	#if EV_FORK_ENABLE	1985	#if EV_FORK_ENABLE
1795	array_free (fork, EMPTY);	1986	array_free (fork, EMPTY);
1796	#endif	1987	#endif
		1988	#if EV_CLEANUP_ENABLE
		1989	array_free (cleanup, EMPTY);
		1990	#endif
1797	array_free (prepare, EMPTY);	1991	array_free (prepare, EMPTY);
1798	array_free (check, EMPTY);	1992	array_free (check, EMPTY);
1799	#if EV_ASYNC_ENABLE	1993	#if EV_ASYNC_ENABLE
1800	array_free (async, EMPTY);	1994	array_free (async, EMPTY);
1801	#endif	1995	#endif
1802		1996
1803	backend = 0;	1997	backend = 0;
		1998
		1999	#if EV_MULTIPLICITY
		2000	if (ev_is_default_loop (EV_A))
		2001	#endif
		2002	ev_default_loop_ptr = 0;
		2003	#if EV_MULTIPLICITY
		2004	else
		2005	ev_free (EV_A);
		2006	#endif
1804	}	2007	}
1805		2008
1806	#if EV_USE_INOTIFY	2009	#if EV_USE_INOTIFY
1807	inline_size void infy_fork (EV_P);	2010	inline_size void infy_fork (EV_P);
1808	#endif	2011	#endif
…		…
1823	infy_fork (EV_A);	2026	infy_fork (EV_A);
1824	#endif	2027	#endif
1825		2028
1826	if (ev_is_active (&pipe_w))	2029	if (ev_is_active (&pipe_w))
1827	{	2030	{
1828	/* this "locks" the handlers against writing to the pipe */	2031	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1829	/* while we modify the fd vars */
1830	sig_pending = 1;
1831	#if EV_ASYNC_ENABLE
1832	async_pending = 1;
1833	#endif
1834		2032
1835	ev_ref (EV_A);	2033	ev_ref (EV_A);
1836	ev_io_stop (EV_A_ &pipe_w);	2034	ev_io_stop (EV_A_ &pipe_w);
1837		2035
1838	#if EV_USE_EVENTFD	2036	#if EV_USE_EVENTFD
…		…
1856	postfork = 0;	2054	postfork = 0;
1857	}	2055	}
1858		2056
1859	#if EV_MULTIPLICITY	2057	#if EV_MULTIPLICITY
1860		2058
1861	struct ev_loop *	2059	struct ev_loop * ecb_cold
1862	ev_loop_new (unsigned int flags)	2060	ev_loop_new (unsigned int flags)
1863	{	2061	{
1864	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2062	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1865		2063
1866	memset (EV_A, 0, sizeof (struct ev_loop));	2064	memset (EV_A, 0, sizeof (struct ev_loop));
1867	loop_init (EV_A_ flags);	2065	loop_init (EV_A_ flags);
1868		2066
1869	if (ev_backend (EV_A))	2067	if (ev_backend (EV_A))
1870	return EV_A;	2068	return EV_A;
1871		2069
		2070	ev_free (EV_A);
1872	return 0;	2071	return 0;
1873	}	2072	}
1874		2073
1875	void
1876	ev_loop_destroy (EV_P)
1877	{
1878	loop_destroy (EV_A);
1879	ev_free (loop);
1880	}
1881
1882	void
1883	ev_loop_fork (EV_P)
1884	{
1885	postfork = 1; /* must be in line with ev_default_fork */
1886	}
1887	#endif /* multiplicity */	2074	#endif /* multiplicity */
1888		2075
1889	#if EV_VERIFY	2076	#if EV_VERIFY
1890	static void noinline	2077	static void noinline ecb_cold
1891	verify_watcher (EV_P_ W w)	2078	verify_watcher (EV_P_ W w)
1892	{	2079	{
1893	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2080	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1894		2081
1895	if (w->pending)	2082	if (w->pending)
1896	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2083	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1897	}	2084	}
1898		2085
1899	static void noinline	2086	static void noinline ecb_cold
1900	verify_heap (EV_P_ ANHE *heap, int N)	2087	verify_heap (EV_P_ ANHE *heap, int N)
1901	{	2088	{
1902	int i;	2089	int i;
1903		2090
1904	for (i = HEAP0; i < N + HEAP0; ++i)	2091	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
1909		2096
1910	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2097	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1911	}	2098	}
1912	}	2099	}
1913		2100
1914	static void noinline	2101	static void noinline ecb_cold
1915	array_verify (EV_P_ W *ws, int cnt)	2102	array_verify (EV_P_ W *ws, int cnt)
1916	{	2103	{
1917	while (cnt--)	2104	while (cnt--)
1918	{	2105	{
1919	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2106	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
1921	}	2108	}
1922	}	2109	}
1923	#endif	2110	#endif
1924		2111
1925	#if EV_FEATURE_API	2112	#if EV_FEATURE_API
1926	void	2113	void ecb_cold
1927	ev_verify (EV_P)	2114	ev_verify (EV_P)
1928	{	2115	{
1929	#if EV_VERIFY	2116	#if EV_VERIFY
1930	int i;	2117	int i;
1931	WL w;	2118	WL w;
…		…
1966	#if EV_FORK_ENABLE	2153	#if EV_FORK_ENABLE
1967	assert (forkmax >= forkcnt);	2154	assert (forkmax >= forkcnt);
1968	array_verify (EV_A_ (W *)forks, forkcnt);	2155	array_verify (EV_A_ (W *)forks, forkcnt);
1969	#endif	2156	#endif
1970		2157
		2158	#if EV_CLEANUP_ENABLE
		2159	assert (cleanupmax >= cleanupcnt);
		2160	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2161	#endif
		2162
1971	#if EV_ASYNC_ENABLE	2163	#if EV_ASYNC_ENABLE
1972	assert (asyncmax >= asynccnt);	2164	assert (asyncmax >= asynccnt);
1973	array_verify (EV_A_ (W *)asyncs, asynccnt);	2165	array_verify (EV_A_ (W *)asyncs, asynccnt);
1974	#endif	2166	#endif
1975		2167
…		…
1992	#endif	2184	#endif
1993	}	2185	}
1994	#endif	2186	#endif
1995		2187
1996	#if EV_MULTIPLICITY	2188	#if EV_MULTIPLICITY
1997	struct ev_loop *	2189	struct ev_loop * ecb_cold
1998	ev_default_loop_init (unsigned int flags)
1999	#else	2190	#else
2000	int	2191	int
		2192	#endif
2001	ev_default_loop (unsigned int flags)	2193	ev_default_loop (unsigned int flags)
2002	#endif
2003	{	2194	{
2004	if (!ev_default_loop_ptr)	2195	if (!ev_default_loop_ptr)
2005	{	2196	{
2006	#if EV_MULTIPLICITY	2197	#if EV_MULTIPLICITY
2007	EV_P = ev_default_loop_ptr = &default_loop_struct;	2198	EV_P = ev_default_loop_ptr = &default_loop_struct;
…		…
2026		2217
2027	return ev_default_loop_ptr;	2218	return ev_default_loop_ptr;
2028	}	2219	}
2029		2220
2030	void	2221	void
2031	ev_default_destroy (void)	2222	ev_loop_fork (EV_P)
2032	{	2223	{
2033	#if EV_MULTIPLICITY
2034	EV_P = ev_default_loop_ptr;
2035	#endif
2036
2037	ev_default_loop_ptr = 0;
2038
2039	#if EV_CHILD_ENABLE
2040	ev_ref (EV_A); /* child watcher */
2041	ev_signal_stop (EV_A_ &childev);
2042	#endif
2043
2044	loop_destroy (EV_A);
2045	}
2046
2047	void
2048	ev_default_fork (void)
2049	{
2050	#if EV_MULTIPLICITY
2051	EV_P = ev_default_loop_ptr;
2052	#endif
2053
2054	postfork = 1; /* must be in line with ev_loop_fork */	2224	postfork = 1; /* must be in line with ev_default_fork */
2055	}	2225	}
2056		2226
2057	/*****************************************************************************/	2227	/*****************************************************************************/
2058		2228
2059	void	2229	void
…		…
2081		2251
2082	for (pri = NUMPRI; pri--; )	2252	for (pri = NUMPRI; pri--; )
2083	while (pendingcnt [pri])	2253	while (pendingcnt [pri])
2084	{	2254	{
2085	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2255	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2086
2087	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
2088	/* ^ this is no longer true, as pending_w could be here */
2089		2256
2090	p->w->pending = 0;	2257	p->w->pending = 0;
2091	EV_CB_INVOKE (p->w, p->events);	2258	EV_CB_INVOKE (p->w, p->events);
2092	EV_FREQUENT_CHECK;	2259	EV_FREQUENT_CHECK;
2093	}	2260	}
…		…
2155	feed_reverse_done (EV_A_ EV_TIMER);	2322	feed_reverse_done (EV_A_ EV_TIMER);
2156	}	2323	}
2157	}	2324	}
2158		2325
2159	#if EV_PERIODIC_ENABLE	2326	#if EV_PERIODIC_ENABLE
		2327
		2328	static void noinline
		2329	periodic_recalc (EV_P_ ev_periodic *w)
		2330	{
		2331	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2332	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2333
		2334	/* the above almost always errs on the low side */
		2335	while (at <= ev_rt_now)
		2336	{
		2337	ev_tstamp nat = at + w->interval;
		2338
		2339	/* when resolution fails us, we use ev_rt_now */
		2340	if (expect_false (nat == at))
		2341	{
		2342	at = ev_rt_now;
		2343	break;
		2344	}
		2345
		2346	at = nat;
		2347	}
		2348
		2349	ev_at (w) = at;
		2350	}
		2351
2160	/* make periodics pending */	2352	/* make periodics pending */
2161	inline_size void	2353	inline_size void
2162	periodics_reify (EV_P)	2354	periodics_reify (EV_P)
2163	{	2355	{
2164	EV_FREQUENT_CHECK;	2356	EV_FREQUENT_CHECK;
…		…
2183	ANHE_at_cache (periodics [HEAP0]);	2375	ANHE_at_cache (periodics [HEAP0]);
2184	downheap (periodics, periodiccnt, HEAP0);	2376	downheap (periodics, periodiccnt, HEAP0);
2185	}	2377	}
2186	else if (w->interval)	2378	else if (w->interval)
2187	{	2379	{
2188	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2380	periodic_recalc (EV_A_ w);
2189	/* if next trigger time is not sufficiently in the future, put it there */
2190	/* this might happen because of floating point inexactness */
2191	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2192	{
2193	ev_at (w) += w->interval;
2194
2195	/* if interval is unreasonably low we might still have a time in the past */
2196	/* so correct this. this will make the periodic very inexact, but the user */
2197	/* has effectively asked to get triggered more often than possible */
2198	if (ev_at (w) < ev_rt_now)
2199	ev_at (w) = ev_rt_now;
2200	}
2201
2202	ANHE_at_cache (periodics [HEAP0]);	2381	ANHE_at_cache (periodics [HEAP0]);
2203	downheap (periodics, periodiccnt, HEAP0);	2382	downheap (periodics, periodiccnt, HEAP0);
2204	}	2383	}
2205	else	2384	else
2206	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	2385	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
2214	}	2393	}
2215	}	2394	}
2216		2395
2217	/* simply recalculate all periodics */	2396	/* simply recalculate all periodics */
2218	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2397	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2219	static void noinline	2398	static void noinline ecb_cold
2220	periodics_reschedule (EV_P)	2399	periodics_reschedule (EV_P)
2221	{	2400	{
2222	int i;	2401	int i;
2223		2402
2224	/* adjust periodics after time jump */	2403	/* adjust periodics after time jump */
…		…
2227	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);	2406	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
2228		2407
2229	if (w->reschedule_cb)	2408	if (w->reschedule_cb)
2230	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2409	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2231	else if (w->interval)	2410	else if (w->interval)
2232	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2411	periodic_recalc (EV_A_ w);
2233		2412
2234	ANHE_at_cache (periodics [i]);	2413	ANHE_at_cache (periodics [i]);
2235	}	2414	}
2236		2415
2237	reheap (periodics, periodiccnt);	2416	reheap (periodics, periodiccnt);
2238	}	2417	}
2239	#endif	2418	#endif
2240		2419
2241	/* adjust all timers by a given offset */	2420	/* adjust all timers by a given offset */
2242	static void noinline	2421	static void noinline ecb_cold
2243	timers_reschedule (EV_P_ ev_tstamp adjust)	2422	timers_reschedule (EV_P_ ev_tstamp adjust)
2244	{	2423	{
2245	int i;	2424	int i;
2246		2425
2247	for (i = 0; i < timercnt; ++i)	2426	for (i = 0; i < timercnt; ++i)
…		…
2284	* doesn't hurt either as we only do this on time-jumps or	2463	* doesn't hurt either as we only do this on time-jumps or
2285	* in the unlikely event of having been preempted here.	2464	* in the unlikely event of having been preempted here.
2286	*/	2465	*/
2287	for (i = 4; --i; )	2466	for (i = 4; --i; )
2288	{	2467	{
		2468	ev_tstamp diff;
2289	rtmn_diff = ev_rt_now - mn_now;	2469	rtmn_diff = ev_rt_now - mn_now;
2290		2470
		2471	diff = odiff - rtmn_diff;
		2472
2291	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))	2473	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2292	return; /* all is well */	2474	return; /* all is well */
2293		2475
2294	ev_rt_now = ev_time ();	2476	ev_rt_now = ev_time ();
2295	mn_now = get_clock ();	2477	mn_now = get_clock ();
2296	now_floor = mn_now;	2478	now_floor = mn_now;
…		…
2386	ev_tstamp prev_mn_now = mn_now;	2568	ev_tstamp prev_mn_now = mn_now;
2387		2569
2388	/* update time to cancel out callback processing overhead */	2570	/* update time to cancel out callback processing overhead */
2389	time_update (EV_A_ 1e100);	2571	time_update (EV_A_ 1e100);
2390		2572
		2573	/* from now on, we want a pipe-wake-up */
		2574	pipe_write_wanted = 1;
		2575
2391	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2576	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2392	{	2577	{
2393	waittime = MAX_BLOCKTIME;	2578	waittime = MAX_BLOCKTIME;
2394		2579
2395	if (timercnt)	2580	if (timercnt)
2396	{	2581	{
2397	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2582	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2398	if (waittime > to) waittime = to;	2583	if (waittime > to) waittime = to;
2399	}	2584	}
2400		2585
2401	#if EV_PERIODIC_ENABLE	2586	#if EV_PERIODIC_ENABLE
2402	if (periodiccnt)	2587	if (periodiccnt)
2403	{	2588	{
2404	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2589	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2405	if (waittime > to) waittime = to;	2590	if (waittime > to) waittime = to;
2406	}	2591	}
2407	#endif	2592	#endif
2408		2593
2409	/* don't let timeouts decrease the waittime below timeout_blocktime */	2594	/* don't let timeouts decrease the waittime below timeout_blocktime */
2410	if (expect_false (waittime < timeout_blocktime))	2595	if (expect_false (waittime < timeout_blocktime))
2411	waittime = timeout_blocktime;	2596	waittime = timeout_blocktime;
		2597
		2598	/* at this point, we NEED to wait, so we have to ensure */
		2599	/* to pass a minimum nonzero value to the backend */
		2600	if (expect_false (waittime < backend_mintime))
		2601	waittime = backend_mintime;
2412		2602
2413	/* extra check because io_blocktime is commonly 0 */	2603	/* extra check because io_blocktime is commonly 0 */
2414	if (expect_false (io_blocktime))	2604	if (expect_false (io_blocktime))
2415	{	2605	{
2416	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2606	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2417		2607
2418	if (sleeptime > waittime - backend_fudge)	2608	if (sleeptime > waittime - backend_mintime)
2419	sleeptime = waittime - backend_fudge;	2609	sleeptime = waittime - backend_mintime;
2420		2610
2421	if (expect_true (sleeptime > 0.))	2611	if (expect_true (sleeptime > 0.))
2422	{	2612	{
2423	ev_sleep (sleeptime);	2613	ev_sleep (sleeptime);
2424	waittime -= sleeptime;	2614	waittime -= sleeptime;
…		…
2430	++loop_count;	2620	++loop_count;
2431	#endif	2621	#endif
2432	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2622	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2433	backend_poll (EV_A_ waittime);	2623	backend_poll (EV_A_ waittime);
2434	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2624	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2625
		2626	pipe_write_wanted = 0;
		2627
		2628	if (pipe_write_skipped)
		2629	{
		2630	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2631	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2632	}
		2633
2435		2634
2436	/* update ev_rt_now, do magic */	2635	/* update ev_rt_now, do magic */
2437	time_update (EV_A_ waittime + sleeptime);	2636	time_update (EV_A_ waittime + sleeptime);
2438	}	2637	}
2439		2638
…		…
2729	if (w->reschedule_cb)	2928	if (w->reschedule_cb)
2730	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2929	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2731	else if (w->interval)	2930	else if (w->interval)
2732	{	2931	{
2733	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));	2932	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2734	/* this formula differs from the one in periodic_reify because we do not always round up */	2933	periodic_recalc (EV_A_ w);
2735	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2736	}	2934	}
2737	else	2935	else
2738	ev_at (w) = w->offset;	2936	ev_at (w) = w->offset;
2739		2937
2740	EV_FREQUENT_CHECK;	2938	EV_FREQUENT_CHECK;
…		…
2861	sa.sa_handler = ev_sighandler;	3059	sa.sa_handler = ev_sighandler;
2862	sigfillset (&sa.sa_mask);	3060	sigfillset (&sa.sa_mask);
2863	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	3061	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2864	sigaction (w->signum, &sa, 0);	3062	sigaction (w->signum, &sa, 0);
2865		3063
		3064	if (origflags & EVFLAG_NOSIGMASK)
		3065	{
2866	sigemptyset (&sa.sa_mask);	3066	sigemptyset (&sa.sa_mask);
2867	sigaddset (&sa.sa_mask, w->signum);	3067	sigaddset (&sa.sa_mask, w->signum);
2868	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);	3068	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		3069	}
2869	#endif	3070	#endif
2870	}	3071	}
2871		3072
2872	EV_FREQUENT_CHECK;	3073	EV_FREQUENT_CHECK;
2873	}	3074	}
…		…
3014	if (!pend \|\| pend == path)	3215	if (!pend \|\| pend == path)
3015	break;	3216	break;
3016		3217
3017	*pend = 0;	3218	*pend = 0;
3018	w->wd = inotify_add_watch (fs_fd, path, mask);	3219	w->wd = inotify_add_watch (fs_fd, path, mask);
3019	}	3220	}
3020	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	3221	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
3021	}	3222	}
3022	}	3223	}
3023		3224
3024	if (w->wd >= 0)	3225	if (w->wd >= 0)
…		…
3091	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3292	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3092	ofs += sizeof (struct inotify_event) + ev->len;	3293	ofs += sizeof (struct inotify_event) + ev->len;
3093	}	3294	}
3094	}	3295	}
3095		3296
3096	inline_size void	3297	inline_size void ecb_cold
3097	ev_check_2625 (EV_P)	3298	ev_check_2625 (EV_P)
3098	{	3299	{
3099	/* kernels < 2.6.25 are borked	3300	/* kernels < 2.6.25 are borked
3100	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3301	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3101	*/	3302	*/
…		…
3565		3766
3566	EV_FREQUENT_CHECK;	3767	EV_FREQUENT_CHECK;
3567	}	3768	}
3568	#endif	3769	#endif
3569		3770
		3771	#if EV_CLEANUP_ENABLE
		3772	void
		3773	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3774	{
		3775	if (expect_false (ev_is_active (w)))
		3776	return;
		3777
		3778	EV_FREQUENT_CHECK;
		3779
		3780	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3781	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3782	cleanups [cleanupcnt - 1] = w;
		3783
		3784	/* cleanup watchers should never keep a refcount on the loop */
		3785	ev_unref (EV_A);
		3786	EV_FREQUENT_CHECK;
		3787	}
		3788
		3789	void
		3790	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3791	{
		3792	clear_pending (EV_A_ (W)w);
		3793	if (expect_false (!ev_is_active (w)))
		3794	return;
		3795
		3796	EV_FREQUENT_CHECK;
		3797	ev_ref (EV_A);
		3798
		3799	{
		3800	int active = ev_active (w);
		3801
		3802	cleanups [active - 1] = cleanups [--cleanupcnt];
		3803	ev_active (cleanups [active - 1]) = active;
		3804	}
		3805
		3806	ev_stop (EV_A_ (W)w);
		3807
		3808	EV_FREQUENT_CHECK;
		3809	}
		3810	#endif
		3811
3570	#if EV_ASYNC_ENABLE	3812	#if EV_ASYNC_ENABLE
3571	void	3813	void
3572	ev_async_start (EV_P_ ev_async *w)	3814	ev_async_start (EV_P_ ev_async *w)
3573	{	3815	{
3574	if (expect_false (ev_is_active (w)))	3816	if (expect_false (ev_is_active (w)))
…		…
3685	}	3927	}
3686		3928
3687	/*****************************************************************************/	3929	/*****************************************************************************/
3688		3930
3689	#if EV_WALK_ENABLE	3931	#if EV_WALK_ENABLE
3690	void	3932	void ecb_cold
3691	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3933	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3692	{	3934	{
3693	int i, j;	3935	int i, j;
3694	ev_watcher_list wl, wn;	3936	ev_watcher_list wl, wn;
3695		3937

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Comparing libev/ev.c (file contents): Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC vs. Revision 1.379 by root, Sun Jun 19 17:55:13 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC vs.
Revision 1.379 by root, Sun Jun 19 17:55:13 2011 UTC