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Comparing libev/ev.c (file contents):
Revision 1.89 by root, Sat Nov 10 19:48:44 2007 UTC vs.
Revision 1.357 by root, Sat Oct 23 22:25:44 2010 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		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-
		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-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	/* this big block deduces configuration from config.h */
33	extern "C" {
34	#endif
35
36	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
		42	# ifdef EV_CONFIG_H
		43	# include EV_CONFIG_H
		44	# else
37	# include "config.h"	45	# include "config.h"
		46	# endif
		47
		48	# if HAVE_CLOCK_SYSCALL
		49	# ifndef EV_USE_CLOCK_SYSCALL
		50	# define EV_USE_CLOCK_SYSCALL 1
		51	# ifndef EV_USE_REALTIME
		52	# define EV_USE_REALTIME 0
		53	# endif
		54	# ifndef EV_USE_MONOTONIC
		55	# define EV_USE_MONOTONIC 1
		56	# endif
		57	# endif
		58	# elif !defined(EV_USE_CLOCK_SYSCALL)
		59	# define EV_USE_CLOCK_SYSCALL 0
		60	# endif
38		61
39	# if HAVE_CLOCK_GETTIME	62	# if HAVE_CLOCK_GETTIME
		63	# ifndef EV_USE_MONOTONIC
40	# define EV_USE_MONOTONIC 1	64	# define EV_USE_MONOTONIC 1
		65	# endif
		66	# ifndef EV_USE_REALTIME
41	# define EV_USE_REALTIME 1	67	# define EV_USE_REALTIME 0
		68	# endif
		69	# else
		70	# ifndef EV_USE_MONOTONIC
		71	# define EV_USE_MONOTONIC 0
		72	# endif
		73	# ifndef EV_USE_REALTIME
		74	# define EV_USE_REALTIME 0
		75	# endif
42	# endif	76	# endif
43		77
		78	# if HAVE_NANOSLEEP
		79	# ifndef EV_USE_NANOSLEEP
		80	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		81	# endif
		82	# else
		83	# undef EV_USE_NANOSLEEP
		84	# define EV_USE_NANOSLEEP 0
		85	# endif
		86
44	# if HAVE_SELECT && HAVE_SYS_SELECT_H	87	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		88	# ifndef EV_USE_SELECT
		89	# define EV_USE_SELECT EV_FEATURE_BACKENDS
		90	# endif
		91	# else
		92	# undef EV_USE_SELECT
45	# define EV_USE_SELECT 1	93	# define EV_USE_SELECT 0
46	# endif	94	# endif
47		95
48	# if HAVE_POLL && HAVE_POLL_H	96	# if HAVE_POLL && HAVE_POLL_H
		97	# ifndef EV_USE_POLL
		98	# define EV_USE_POLL EV_FEATURE_BACKENDS
		99	# endif
		100	# else
		101	# undef EV_USE_POLL
49	# define EV_USE_POLL 1	102	# define EV_USE_POLL 0
50	# endif	103	# endif
51		104
52	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	105	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		106	# ifndef EV_USE_EPOLL
		107	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		108	# endif
		109	# else
		110	# undef EV_USE_EPOLL
53	# define EV_USE_EPOLL 1	111	# define EV_USE_EPOLL 0
54	# endif	112	# endif
55		113
56	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	114	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
		115	# ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
		117	# endif
		118	# else
		119	# undef EV_USE_KQUEUE
57	# define EV_USE_KQUEUE 1	120	# define EV_USE_KQUEUE 0
58	# endif	121	# endif
		122
		123	# if HAVE_PORT_H && HAVE_PORT_CREATE
		124	# ifndef EV_USE_PORT
		125	# define EV_USE_PORT EV_FEATURE_BACKENDS
		126	# endif
		127	# else
		128	# undef EV_USE_PORT
		129	# define EV_USE_PORT 0
		130	# endif
59		131
		132	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		133	# ifndef EV_USE_INOTIFY
		134	# define EV_USE_INOTIFY EV_FEATURE_OS
		135	# endif
		136	# else
		137	# undef EV_USE_INOTIFY
		138	# define EV_USE_INOTIFY 0
		139	# endif
		140
		141	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		142	# ifndef EV_USE_SIGNALFD
		143	# define EV_USE_SIGNALFD EV_FEATURE_OS
		144	# endif
		145	# else
		146	# undef EV_USE_SIGNALFD
		147	# define EV_USE_SIGNALFD 0
		148	# endif
		149
		150	# if HAVE_EVENTFD
		151	# ifndef EV_USE_EVENTFD
		152	# define EV_USE_EVENTFD EV_FEATURE_OS
		153	# endif
		154	# else
		155	# undef EV_USE_EVENTFD
		156	# define EV_USE_EVENTFD 0
		157	# endif
		158
60	#endif	159	#endif
61		160
62	#include <math.h>	161	#include <math.h>
63	#include <stdlib.h>	162	#include <stdlib.h>
		163	#include <string.h>
64	#include <fcntl.h>	164	#include <fcntl.h>
65	#include <stddef.h>	165	#include <stddef.h>
66		166
67	#include <stdio.h>	167	#include <stdio.h>
68		168
69	#include <assert.h>	169	#include <assert.h>
70	#include <errno.h>	170	#include <errno.h>
71	#include <sys/types.h>	171	#include <sys/types.h>
72	#include <time.h>	172	#include <time.h>
		173	#include <limits.h>
73		174
74	#include <signal.h>	175	#include <signal.h>
75
76	#ifndef WIN32
77	# include <unistd.h>
78	# include <sys/time.h>
79	# include <sys/wait.h>
80	#endif
81	/**/
82
83	#ifndef EV_USE_MONOTONIC
84	# define EV_USE_MONOTONIC 1
85	#endif
86
87	#ifndef EV_USE_SELECT
88	# define EV_USE_SELECT 1
89	#endif
90
91	#ifndef EV_USE_POLL
92	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
93	#endif
94
95	#ifndef EV_USE_EPOLL
96	# define EV_USE_EPOLL 0
97	#endif
98
99	#ifndef EV_USE_KQUEUE
100	# define EV_USE_KQUEUE 0
101	#endif
102
103	#ifndef EV_USE_WIN32
104	# ifdef WIN32
105	# define EV_USE_WIN32 0 /* it does not exist, use select */
106	# undef EV_USE_SELECT
107	# define EV_USE_SELECT 1
108	# else
109	# define EV_USE_WIN32 0
110	# endif
111	#endif
112
113	#ifndef EV_USE_REALTIME
114	# define EV_USE_REALTIME 1
115	#endif
116
117	/**/
118
119	#ifndef CLOCK_MONOTONIC
120	# undef EV_USE_MONOTONIC
121	# define EV_USE_MONOTONIC 0
122	#endif
123
124	#ifndef CLOCK_REALTIME
125	# undef EV_USE_REALTIME
126	# define EV_USE_REALTIME 0
127	#endif
128
129	/**/
130
131	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
132	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
133	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
134	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
135		176
136	#ifdef EV_H	177	#ifdef EV_H
137	# include EV_H	178	# include EV_H
138	#else	179	#else
139	# include "ev.h"	180	# include "ev.h"
140	#endif	181	#endif
141		182
		183	EV_CPP(extern "C" {)
		184
		185	#ifndef _WIN32
		186	# include <sys/time.h>
		187	# include <sys/wait.h>
		188	# include <unistd.h>
		189	#else
		190	# include <io.h>
		191	# define WIN32_LEAN_AND_MEAN
		192	# include <windows.h>
		193	# ifndef EV_SELECT_IS_WINSOCKET
		194	# define EV_SELECT_IS_WINSOCKET 1
		195	# endif
		196	# undef EV_AVOID_STDIO
		197	#endif
		198
		199	/* OS X, in its infinite idiocy, actually HARDCODES
		200	* a limit of 1024 into their select. Where people have brains,
		201	* OS X engineers apparently have a vacuum. Or maybe they were
		202	* ordered to have a vacuum, or they do anything for money.
		203	* This might help. Or not.
		204	*/
		205	#define _DARWIN_UNLIMITED_SELECT 1
		206
		207	/* this block tries to deduce configuration from header-defined symbols and defaults */
		208
		209	/* try to deduce the maximum number of signals on this platform */
		210	#if defined (EV_NSIG)
		211	/* use what's provided */
		212	#elif defined (NSIG)
		213	# define EV_NSIG (NSIG)
		214	#elif defined(_NSIG)
		215	# define EV_NSIG (_NSIG)
		216	#elif defined (SIGMAX)
		217	# define EV_NSIG (SIGMAX+1)
		218	#elif defined (SIG_MAX)
		219	# define EV_NSIG (SIG_MAX+1)
		220	#elif defined (_SIG_MAX)
		221	# define EV_NSIG (_SIG_MAX+1)
		222	#elif defined (MAXSIG)
		223	# define EV_NSIG (MAXSIG+1)
		224	#elif defined (MAX_SIG)
		225	# define EV_NSIG (MAX_SIG+1)
		226	#elif defined (SIGARRAYSIZE)
		227	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		228	#elif defined (_sys_nsig)
		229	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		230	#else
		231	# error "unable to find value for NSIG, please report"
		232	/* to make it compile regardless, just remove the above line, */
		233	/* but consider reporting it, too! :) */
		234	# define EV_NSIG 65
		235	#endif
		236
		237	#ifndef EV_USE_CLOCK_SYSCALL
		238	# if __linux && __GLIBC__ >= 2
		239	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
		240	# else
		241	# define EV_USE_CLOCK_SYSCALL 0
		242	# endif
		243	#endif
		244
		245	#ifndef EV_USE_MONOTONIC
		246	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		247	# define EV_USE_MONOTONIC EV_FEATURE_OS
		248	# else
		249	# define EV_USE_MONOTONIC 0
		250	# endif
		251	#endif
		252
		253	#ifndef EV_USE_REALTIME
		254	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
		255	#endif
		256
		257	#ifndef EV_USE_NANOSLEEP
		258	# if _POSIX_C_SOURCE >= 199309L
		259	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		260	# else
		261	# define EV_USE_NANOSLEEP 0
		262	# endif
		263	#endif
		264
		265	#ifndef EV_USE_SELECT
		266	# define EV_USE_SELECT EV_FEATURE_BACKENDS
		267	#endif
		268
		269	#ifndef EV_USE_POLL
		270	# ifdef _WIN32
		271	# define EV_USE_POLL 0
		272	# else
		273	# define EV_USE_POLL EV_FEATURE_BACKENDS
		274	# endif
		275	#endif
		276
		277	#ifndef EV_USE_EPOLL
		278	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		279	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		280	# else
		281	# define EV_USE_EPOLL 0
		282	# endif
		283	#endif
		284
		285	#ifndef EV_USE_KQUEUE
		286	# define EV_USE_KQUEUE 0
		287	#endif
		288
		289	#ifndef EV_USE_PORT
		290	# define EV_USE_PORT 0
		291	#endif
		292
		293	#ifndef EV_USE_INOTIFY
		294	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		295	# define EV_USE_INOTIFY EV_FEATURE_OS
		296	# else
		297	# define EV_USE_INOTIFY 0
		298	# endif
		299	#endif
		300
		301	#ifndef EV_PID_HASHSIZE
		302	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		303	#endif
		304
		305	#ifndef EV_INOTIFY_HASHSIZE
		306	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		307	#endif
		308
		309	#ifndef EV_USE_EVENTFD
		310	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		311	# define EV_USE_EVENTFD EV_FEATURE_OS
		312	# else
		313	# define EV_USE_EVENTFD 0
		314	# endif
		315	#endif
		316
		317	#ifndef EV_USE_SIGNALFD
		318	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		319	# define EV_USE_SIGNALFD EV_FEATURE_OS
		320	# else
		321	# define EV_USE_SIGNALFD 0
		322	# endif
		323	#endif
		324
		325	#if 0 /* debugging */
		326	# define EV_VERIFY 3
		327	# define EV_USE_4HEAP 1
		328	# define EV_HEAP_CACHE_AT 1
		329	#endif
		330
		331	#ifndef EV_VERIFY
		332	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
		333	#endif
		334
		335	#ifndef EV_USE_4HEAP
		336	# define EV_USE_4HEAP EV_FEATURE_DATA
		337	#endif
		338
		339	#ifndef EV_HEAP_CACHE_AT
		340	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
		341	#endif
		342
		343	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		344	/* which makes programs even slower. might work on other unices, too. */
		345	#if EV_USE_CLOCK_SYSCALL
		346	# include <syscall.h>
		347	# ifdef SYS_clock_gettime
		348	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		349	# undef EV_USE_MONOTONIC
		350	# define EV_USE_MONOTONIC 1
		351	# else
		352	# undef EV_USE_CLOCK_SYSCALL
		353	# define EV_USE_CLOCK_SYSCALL 0
		354	# endif
		355	#endif
		356
		357	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		358
		359	#ifdef _AIX
		360	/* AIX has a completely broken poll.h header */
		361	# undef EV_USE_POLL
		362	# define EV_USE_POLL 0
		363	#endif
		364
		365	#ifndef CLOCK_MONOTONIC
		366	# undef EV_USE_MONOTONIC
		367	# define EV_USE_MONOTONIC 0
		368	#endif
		369
		370	#ifndef CLOCK_REALTIME
		371	# undef EV_USE_REALTIME
		372	# define EV_USE_REALTIME 0
		373	#endif
		374
		375	#if !EV_STAT_ENABLE
		376	# undef EV_USE_INOTIFY
		377	# define EV_USE_INOTIFY 0
		378	#endif
		379
		380	#if !EV_USE_NANOSLEEP
		381	# ifndef _WIN32
		382	# include <sys/select.h>
		383	# endif
		384	#endif
		385
		386	#if EV_USE_INOTIFY
		387	# include <sys/statfs.h>
		388	# include <sys/inotify.h>
		389	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		390	# ifndef IN_DONT_FOLLOW
		391	# undef EV_USE_INOTIFY
		392	# define EV_USE_INOTIFY 0
		393	# endif
		394	#endif
		395
		396	#if EV_SELECT_IS_WINSOCKET
		397	# include <winsock.h>
		398	#endif
		399
		400	#if EV_USE_EVENTFD
		401	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		402	# include <stdint.h>
		403	# ifndef EFD_NONBLOCK
		404	# define EFD_NONBLOCK O_NONBLOCK
		405	# endif
		406	# ifndef EFD_CLOEXEC
		407	# ifdef O_CLOEXEC
		408	# define EFD_CLOEXEC O_CLOEXEC
		409	# else
		410	# define EFD_CLOEXEC 02000000
		411	# endif
		412	# endif
		413	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
		414	#endif
		415
		416	#if EV_USE_SIGNALFD
		417	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		418	# include <stdint.h>
		419	# ifndef SFD_NONBLOCK
		420	# define SFD_NONBLOCK O_NONBLOCK
		421	# endif
		422	# ifndef SFD_CLOEXEC
		423	# ifdef O_CLOEXEC
		424	# define SFD_CLOEXEC O_CLOEXEC
		425	# else
		426	# define SFD_CLOEXEC 02000000
		427	# endif
		428	# endif
		429	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
		430
		431	struct signalfd_siginfo
		432	{
		433	uint32_t ssi_signo;
		434	char pad[128 - sizeof (uint32_t)];
		435	};
		436	#endif
		437
		438	/**/
		439
		440	#if EV_VERIFY >= 3
		441	# define EV_FREQUENT_CHECK ev_verify (EV_A)
		442	#else
		443	# define EV_FREQUENT_CHECK do { } while (0)
		444	#endif
		445
		446	/*
		447	* This is used to avoid 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.
		452	* Better solutions welcome.
		453	*/
		454	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		455
		456	#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) */
		458
		459	#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)
		461
142	#if __GNUC__ >= 3	462	#if __GNUC__ >= 4
143	# define expect(expr,value) __builtin_expect ((expr),(value))	463	# define expect(expr,value) __builtin_expect ((expr),(value))
144	# define inline inline	464	# define noinline __attribute__ ((noinline))
145	#else	465	#else
146	# define expect(expr,value) (expr)	466	# define expect(expr,value) (expr)
147	# define inline static	467	# define noinline
		468	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		469	# define inline
		470	# endif
148	#endif	471	#endif
149		472
150	#define expect_false(expr) expect ((expr) != 0, 0)	473	#define expect_false(expr) expect ((expr) != 0, 0)
151	#define expect_true(expr) expect ((expr) != 0, 1)	474	#define expect_true(expr) expect ((expr) != 0, 1)
		475	#define inline_size static inline
152		476
		477	#if EV_FEATURE_CODE
		478	# define inline_speed static inline
		479	#else
		480	# define inline_speed static noinline
		481	#endif
		482
153	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		484
		485	#if EV_MINPRI == EV_MAXPRI
		486	# define ABSPRI(w) (((W)w), 0)
		487	#else
154	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	488	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		489	#endif
155		490
		491	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		492	#define EMPTY2(a,b) /* used to suppress some warnings */
		493
156	typedef struct ev_watcher *W;	494	typedef ev_watcher *W;
157	typedef struct ev_watcher_list *WL;	495	typedef ev_watcher_list *WL;
158	typedef struct ev_watcher_time *WT;	496	typedef ev_watcher_time *WT;
159		497
		498	#define ev_active(w) ((W)(w))->active
		499	#define ev_at(w) ((WT)(w))->at
		500
		501	#if EV_USE_REALTIME
		502	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		503	/* giving it a reasonably high chance of working on typical architectures */
		504	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		505	#endif
		506
		507	#if EV_USE_MONOTONIC
160	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	508	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		509	#endif
161		510
		511	#ifndef EV_FD_TO_WIN32_HANDLE
		512	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		513	#endif
		514	#ifndef EV_WIN32_HANDLE_TO_FD
		515	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		516	#endif
		517	#ifndef EV_WIN32_CLOSE_FD
		518	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		519	#endif
		520
		521	#ifdef _WIN32
162	#include "ev_win32.c"	522	# include "ev_win32.c"
		523	#endif
163		524
164	/*****************************************************************************/	525	/*****************************************************************************/
165		526
		527	#ifdef __linux
		528	# include <sys/utsname.h>
		529	#endif
		530
		531	static unsigned int noinline
		532	ev_linux_version (void)
		533	{
		534	#ifdef __linux
		535	struct utsname buf;
		536	unsigned int v;
		537	int i;
		538	char *p = buf.release;
		539
		540	if (uname (&buf))
		541	return 0;
		542
		543	for (i = 3+1; --i; )
		544	{
		545	unsigned int c = 0;
		546
		547	for (;;)
		548	{
		549	if (*p >= '0' && *p <= '9')
		550	c = c * 10 + *p++ - '0';
		551	else
		552	{
		553	p += *p == '.';
		554	break;
		555	}
		556	}
		557
		558	v = (v << 8) | c;
		559	}
		560
		561	return v;
		562	#else
		563	return 0;
		564	#endif
		565	}
		566
		567	/*****************************************************************************/
		568
		569	#if EV_AVOID_STDIO
		570	static void noinline
		571	ev_printerr (const char *msg)
		572	{
		573	write (STDERR_FILENO, msg, strlen (msg));
		574	}
		575	#endif
		576
166	static void (*syserr_cb)(const char *msg);	577	static void (*syserr_cb)(const char *msg);
167		578
		579	void
168	void ev_set_syserr_cb (void (*cb)(const char *msg))	580	ev_set_syserr_cb (void (*cb)(const char *msg))
169	{	581	{
170	syserr_cb = cb;	582	syserr_cb = cb;
171	}	583	}
172		584
173	static void	585	static void noinline
174	syserr (const char *msg)	586	ev_syserr (const char *msg)
175	{	587	{
176	if (!msg)	588	if (!msg)
177	msg = "(libev) system error";	589	msg = "(libev) system error";
178		590
179	if (syserr_cb)	591	if (syserr_cb)
180	syserr_cb (msg);	592	syserr_cb (msg);
181	else	593	else
182	{	594	{
		595	#if EV_AVOID_STDIO
		596	const char *err = strerror (errno);
		597
		598	ev_printerr (msg);
		599	ev_printerr (": ");
		600	ev_printerr (err);
		601	ev_printerr ("\n");
		602	#else
183	perror (msg);	603	perror (msg);
		604	#endif
184	abort ();	605	abort ();
185	}	606	}
186	}	607	}
187		608
		609	static void *
		610	ev_realloc_emul (void *ptr, long size)
		611	{
		612	#if __GLIBC__
		613	return realloc (ptr, size);
		614	#else
		615	/* some systems, notably openbsd and darwin, fail to properly
		616	* implement realloc (x, 0) (as required by both ansi c-89 and
		617	* the single unix specification, so work around them here.
		618	*/
		619
		620	if (size)
		621	return realloc (ptr, size);
		622
		623	free (ptr);
		624	return 0;
		625	#endif
		626	}
		627
188	static void *(*alloc)(void *ptr, long size);	628	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
189		629
		630	void
190	void ev_set_allocator (void *(*cb)(void *ptr, long size))	631	ev_set_allocator (void *(*cb)(void *ptr, long size))
191	{	632	{
192	alloc = cb;	633	alloc = cb;
193	}	634	}
194		635
195	static void *	636	inline_speed void *
196	ev_realloc (void *ptr, long size)	637	ev_realloc (void *ptr, long size)
197	{	638	{
198	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	639	ptr = alloc (ptr, size);
199		640
200	if (!ptr && size)	641	if (!ptr && size)
201	{	642	{
		643	#if EV_AVOID_STDIO
		644	ev_printerr ("libev: memory allocation failed, aborting.\n");
		645	#else
202	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	646	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		647	#endif
203	abort ();	648	abort ();
204	}	649	}
205		650
206	return ptr;	651	return ptr;
207	}	652	}
…		…
209	#define ev_malloc(size) ev_realloc (0, (size))	654	#define ev_malloc(size) ev_realloc (0, (size))
210	#define ev_free(ptr) ev_realloc ((ptr), 0)	655	#define ev_free(ptr) ev_realloc ((ptr), 0)
211		656
212	/*****************************************************************************/	657	/*****************************************************************************/
213		658
		659	/* set in reify when reification needed */
		660	#define EV_ANFD_REIFY 1
		661
		662	/* file descriptor info structure */
214	typedef struct	663	typedef struct
215	{	664	{
216	WL head;	665	WL head;
217	unsigned char events;	666	unsigned char events; /* the events watched for */
		667	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		668	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
218	unsigned char reify;	669	unsigned char unused;
		670	#if EV_USE_EPOLL
		671	unsigned int egen; /* generation counter to counter epoll bugs */
		672	#endif
		673	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		674	SOCKET handle;
		675	#endif
		676	#if EV_USE_IOCP
		677	OVERLAPPED or, ow;
		678	#endif
219	} ANFD;	679	} ANFD;
220		680
		681	/* stores the pending event set for a given watcher */
221	typedef struct	682	typedef struct
222	{	683	{
223	W w;	684	W w;
224	int events;	685	int events; /* the pending event set for the given watcher */
225	} ANPENDING;	686	} ANPENDING;
		687
		688	#if EV_USE_INOTIFY
		689	/* hash table entry per inotify-id */
		690	typedef struct
		691	{
		692	WL head;
		693	} ANFS;
		694	#endif
		695
		696	/* Heap Entry */
		697	#if EV_HEAP_CACHE_AT
		698	/* a heap element */
		699	typedef struct {
		700	ev_tstamp at;
		701	WT w;
		702	} ANHE;
		703
		704	#define ANHE_w(he) (he).w /* access watcher, read-write */
		705	#define ANHE_at(he) (he).at /* access cached at, read-only */
		706	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		707	#else
		708	/* a heap element */
		709	typedef WT ANHE;
		710
		711	#define ANHE_w(he) (he)
		712	#define ANHE_at(he) (he)->at
		713	#define ANHE_at_cache(he)
		714	#endif
226		715
227	#if EV_MULTIPLICITY	716	#if EV_MULTIPLICITY
228		717
229	struct ev_loop	718	struct ev_loop
230	{	719	{
231	ev_tstamp ev_rt_now;	720	ev_tstamp ev_rt_now;
		721	#define ev_rt_now ((loop)->ev_rt_now)
232	#define VAR(name,decl) decl;	722	#define VAR(name,decl) decl;
233	#include "ev_vars.h"	723	#include "ev_vars.h"
234	#undef VAR	724	#undef VAR
235	};	725	};
236	#include "ev_wrap.h"	726	#include "ev_wrap.h"
237		727
238	struct ev_loop default_loop_struct;	728	static struct ev_loop default_loop_struct;
239	static struct ev_loop *default_loop;	729	struct ev_loop *ev_default_loop_ptr;
240		730
241	#else	731	#else
242		732
243	ev_tstamp ev_rt_now;	733	ev_tstamp ev_rt_now;
244	#define VAR(name,decl) static decl;	734	#define VAR(name,decl) static decl;
245	#include "ev_vars.h"	735	#include "ev_vars.h"
246	#undef VAR	736	#undef VAR
247		737
248	static int default_loop;	738	static int ev_default_loop_ptr;
249		739
250	#endif	740	#endif
		741
		742	#if EV_FEATURE_API
		743	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		744	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		745	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		746	#else
		747	# define EV_RELEASE_CB (void)0
		748	# define EV_ACQUIRE_CB (void)0
		749	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		750	#endif
		751
		752	#define EVBREAK_RECURSE 0x80
251		753
252	/*****************************************************************************/	754	/*****************************************************************************/
253		755
254	inline ev_tstamp	756	#ifndef EV_HAVE_EV_TIME
		757	ev_tstamp
255	ev_time (void)	758	ev_time (void)
256	{	759	{
257	#if EV_USE_REALTIME	760	#if EV_USE_REALTIME
		761	if (expect_true (have_realtime))
		762	{
258	struct timespec ts;	763	struct timespec ts;
259	clock_gettime (CLOCK_REALTIME, &ts);	764	clock_gettime (CLOCK_REALTIME, &ts);
260	return ts.tv_sec + ts.tv_nsec * 1e-9;	765	return ts.tv_sec + ts.tv_nsec * 1e-9;
261	#else	766	}
		767	#endif
		768
262	struct timeval tv;	769	struct timeval tv;
263	gettimeofday (&tv, 0);	770	gettimeofday (&tv, 0);
264	return tv.tv_sec + tv.tv_usec * 1e-6;	771	return tv.tv_sec + tv.tv_usec * 1e-6;
265	#endif
266	}	772	}
		773	#endif
267		774
268	inline ev_tstamp	775	inline_size ev_tstamp
269	get_clock (void)	776	get_clock (void)
270	{	777	{
271	#if EV_USE_MONOTONIC	778	#if EV_USE_MONOTONIC
272	if (expect_true (have_monotonic))	779	if (expect_true (have_monotonic))
273	{	780	{
…		…
286	{	793	{
287	return ev_rt_now;	794	return ev_rt_now;
288	}	795	}
289	#endif	796	#endif
290		797
291	#define array_roundsize(type,n) ((n) | 4 & ~3)	798	void
		799	ev_sleep (ev_tstamp delay)
		800	{
		801	if (delay > 0.)
		802	{
		803	#if EV_USE_NANOSLEEP
		804	struct timespec ts;
		805
		806	EV_TS_SET (ts, delay);
		807	nanosleep (&ts, 0);
		808	#elif defined(_WIN32)
		809	Sleep ((unsigned long)(delay * 1e3));
		810	#else
		811	struct timeval tv;
		812
		813	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		814	/* something not guaranteed by newer posix versions, but guaranteed */
		815	/* by older ones */
		816	EV_TV_SET (tv, delay);
		817	select (0, 0, 0, 0, &tv);
		818	#endif
		819	}
		820	}
		821
		822	/*****************************************************************************/
		823
		824	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		825
		826	/* find a suitable new size for the given array, */
		827	/* hopefully by rounding to a nice-to-malloc size */
		828	inline_size int
		829	array_nextsize (int elem, int cur, int cnt)
		830	{
		831	int ncur = cur + 1;
		832
		833	do
		834	ncur <<= 1;
		835	while (cnt > ncur);
		836
		837	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		838	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		839	{
		840	ncur *= elem;
		841	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		842	ncur = ncur - sizeof (void *) * 4;
		843	ncur /= elem;
		844	}
		845
		846	return ncur;
		847	}
		848
		849	static noinline void *
		850	array_realloc (int elem, void *base, int *cur, int cnt)
		851	{
		852	*cur = array_nextsize (elem, *cur, cnt);
		853	return ev_realloc (base, elem * *cur);
		854	}
		855
		856	#define array_init_zero(base,count) \
		857	memset ((void *)(base), 0, sizeof (*(base)) * (count))
292		858
293	#define array_needsize(type,base,cur,cnt,init) \	859	#define array_needsize(type,base,cur,cnt,init) \
294	if (expect_false ((cnt) > cur)) \	860	if (expect_false ((cnt) > (cur))) \
295	{ \	861	{ \
296	int newcnt = cur; \	862	int ocur_ = (cur); \
297	do \	863	(base) = (type *)array_realloc \
298	{ \	864	(sizeof (type), (base), &(cur), (cnt)); \
299	newcnt = array_roundsize (type, newcnt << 1); \	865	init ((base) + (ocur_), (cur) - ocur_); \
300	} \
301	while ((cnt) > newcnt); \
302	\
303	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
304	init (base + cur, newcnt - cur); \
305	cur = newcnt; \
306	}	866	}
307		867
		868	#if 0
308	#define array_slim(type,stem) \	869	#define array_slim(type,stem) \
309	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	870	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
310	{ \	871	{ \
311	stem ## max = array_roundsize (stem ## cnt >> 1); \	872	stem ## max = array_roundsize (stem ## cnt >> 1); \
312	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	873	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
313	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	874	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
314	}	875	}
315		876	#endif
316	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
317	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
318	#define array_free_microshit(stem) \
319	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
320		877
321	#define array_free(stem, idx) \	878	#define array_free(stem, idx) \
322	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	879	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
323		880
324	/*****************************************************************************/	881	/*****************************************************************************/
325		882
326	static void	883	/* dummy callback for pending events */
327	anfds_init (ANFD *base, int count)	884	static void noinline
		885	pendingcb (EV_P_ ev_prepare *w, int revents)
328	{	886	{
329	while (count--)
330	{
331	base->head = 0;
332	base->events = EV_NONE;
333	base->reify = 0;
334
335	++base;
336	}
337	}	887	}
338		888
339	void	889	void noinline
340	ev_feed_event (EV_P_ void *w, int revents)	890	ev_feed_event (EV_P_ void *w, int revents)
341	{	891	{
342	W w_ = (W)w;	892	W w_ = (W)w;
		893	int pri = ABSPRI (w_);
343		894
344	if (w_->pending)	895	if (expect_false (w_->pending))
		896	pendings [pri][w_->pending - 1].events |= revents;
		897	else
345	{	898	{
		899	w_->pending = ++pendingcnt [pri];
		900	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		901	pendings [pri][w_->pending - 1].w = w_;
346	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;	902	pendings [pri][w_->pending - 1].events = revents;
347	return;
348	}	903	}
349
350	w_->pending = ++pendingcnt [ABSPRI (w_)];
351	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
352	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
353	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
354	}	904	}
355		905
356	static void	906	inline_speed void
		907	feed_reverse (EV_P_ W w)
		908	{
		909	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		910	rfeeds [rfeedcnt++] = w;
		911	}
		912
		913	inline_size void
		914	feed_reverse_done (EV_P_ int revents)
		915	{
		916	do
		917	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		918	while (rfeedcnt);
		919	}
		920
		921	inline_speed void
357	queue_events (EV_P_ W *events, int eventcnt, int type)	922	queue_events (EV_P_ W *events, int eventcnt, int type)
358	{	923	{
359	int i;	924	int i;
360		925
361	for (i = 0; i < eventcnt; ++i)	926	for (i = 0; i < eventcnt; ++i)
362	ev_feed_event (EV_A_ events [i], type);	927	ev_feed_event (EV_A_ events [i], type);
363	}	928	}
364		929
		930	/*****************************************************************************/
		931
365	inline void	932	inline_speed void
366	fd_event (EV_P_ int fd, int revents)	933	fd_event_nocheck (EV_P_ int fd, int revents)
367	{	934	{
368	ANFD *anfd = anfds + fd;	935	ANFD *anfd = anfds + fd;
369	struct ev_io *w;	936	ev_io *w;
370		937
371	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	938	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
372	{	939	{
373	int ev = w->events & revents;	940	int ev = w->events & revents;
374		941
375	if (ev)	942	if (ev)
376	ev_feed_event (EV_A_ (W)w, ev);	943	ev_feed_event (EV_A_ (W)w, ev);
377	}	944	}
378	}	945	}
379		946
		947	/* do not submit kernel events for fds that have reify set */
		948	/* because that means they changed while we were polling for new events */
		949	inline_speed void
		950	fd_event (EV_P_ int fd, int revents)
		951	{
		952	ANFD *anfd = anfds + fd;
		953
		954	if (expect_true (!anfd->reify))
		955	fd_event_nocheck (EV_A_ fd, revents);
		956	}
		957
380	void	958	void
381	ev_feed_fd_event (EV_P_ int fd, int revents)	959	ev_feed_fd_event (EV_P_ int fd, int revents)
382	{	960	{
		961	if (fd >= 0 && fd < anfdmax)
383	fd_event (EV_A_ fd, revents);	962	fd_event_nocheck (EV_A_ fd, revents);
384	}	963	}
385		964
386	/*****************************************************************************/	965	/* make sure the external fd watch events are in-sync */
387		966	/* with the kernel/libev internal state */
388	static void	967	inline_size void
389	fd_reify (EV_P)	968	fd_reify (EV_P)
390	{	969	{
391	int i;	970	int i;
392		971
393	for (i = 0; i < fdchangecnt; ++i)	972	for (i = 0; i < fdchangecnt; ++i)
394	{	973	{
395	int fd = fdchanges [i];	974	int fd = fdchanges [i];
396	ANFD *anfd = anfds + fd;	975	ANFD *anfd = anfds + fd;
397	struct ev_io *w;	976	ev_io *w;
398		977
399	int events = 0;	978	unsigned char o_events = anfd->events;
		979	unsigned char o_reify = anfd->reify;
400		980
401	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
402	events |= w->events;
403
404	anfd->reify = 0;	981	anfd->reify = 0;
405		982
406	method_modify (EV_A_ fd, anfd->events, events);	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 */
		994	{
407	anfd->events = events;	995	anfd->events = 0;
		996
		997	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		998	anfd->events |= (unsigned char)w->events;
		999
		1000	if (o_events != anfd->events)
		1001	o_reify = EV__IOFDSET; /* actually |= */
		1002	}
		1003
		1004	if (o_reify & EV__IOFDSET)
		1005	backend_modify (EV_A_ fd, o_events, anfd->events);
408	}	1006	}
409		1007
410	fdchangecnt = 0;	1008	fdchangecnt = 0;
411	}	1009	}
412		1010
413	static void	1011	/* something about the given fd changed */
		1012	inline_size void
414	fd_change (EV_P_ int fd)	1013	fd_change (EV_P_ int fd, int flags)
415	{	1014	{
416	if (anfds [fd].reify)	1015	unsigned char reify = anfds [fd].reify;
417	return;
418
419	anfds [fd].reify = 1;	1016	anfds [fd].reify |= flags;
420		1017
		1018	if (expect_true (!reify))
		1019	{
421	++fdchangecnt;	1020	++fdchangecnt;
422	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));	1021	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
423	fdchanges [fdchangecnt - 1] = fd;	1022	fdchanges [fdchangecnt - 1] = fd;
		1023	}
424	}	1024	}
425		1025
426	static void	1026	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		1027	inline_speed void
427	fd_kill (EV_P_ int fd)	1028	fd_kill (EV_P_ int fd)
428	{	1029	{
429	struct ev_io *w;	1030	ev_io *w;
430		1031
431	while ((w = (struct ev_io *)anfds [fd].head))	1032	while ((w = (ev_io *)anfds [fd].head))
432	{	1033	{
433	ev_io_stop (EV_A_ w);	1034	ev_io_stop (EV_A_ w);
434	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1035	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
435	}	1036	}
436	}	1037	}
437		1038
438	static int	1039	/* check whether the given fd is actually valid, for error recovery */
		1040	inline_size int
439	fd_valid (int fd)	1041	fd_valid (int fd)
440	{	1042	{
441	#ifdef WIN32	1043	#ifdef _WIN32
442	return !!win32_get_osfhandle (fd);	1044	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
443	#else	1045	#else
444	return fcntl (fd, F_GETFD) != -1;	1046	return fcntl (fd, F_GETFD) != -1;
445	#endif	1047	#endif
446	}	1048	}
447		1049
448	/* called on EBADF to verify fds */	1050	/* called on EBADF to verify fds */
449	static void	1051	static void noinline
450	fd_ebadf (EV_P)	1052	fd_ebadf (EV_P)
451	{	1053	{
452	int fd;	1054	int fd;
453		1055
454	for (fd = 0; fd < anfdmax; ++fd)	1056	for (fd = 0; fd < anfdmax; ++fd)
455	if (anfds [fd].events)	1057	if (anfds [fd].events)
456	if (!fd_valid (fd) == -1 && errno == EBADF)	1058	if (!fd_valid (fd) && errno == EBADF)
457	fd_kill (EV_A_ fd);	1059	fd_kill (EV_A_ fd);
458	}	1060	}
459		1061
460	/* called on ENOMEM in select/poll to kill some fds and retry */	1062	/* called on ENOMEM in select/poll to kill some fds and retry */
461	static void	1063	static void noinline
462	fd_enomem (EV_P)	1064	fd_enomem (EV_P)
463	{	1065	{
464	int fd;	1066	int fd;
465		1067
466	for (fd = anfdmax; fd--; )	1068	for (fd = anfdmax; fd--; )
467	if (anfds [fd].events)	1069	if (anfds [fd].events)
468	{	1070	{
469	fd_kill (EV_A_ fd);	1071	fd_kill (EV_A_ fd);
470	return;	1072	break;
471	}	1073	}
472	}	1074	}
473		1075
474	/* usually called after fork if method needs to re-arm all fds from scratch */	1076	/* usually called after fork if backend needs to re-arm all fds from scratch */
475	static void	1077	static void noinline
476	fd_rearm_all (EV_P)	1078	fd_rearm_all (EV_P)
477	{	1079	{
478	int fd;	1080	int fd;
479		1081
480	/* this should be highly optimised to not do anything but set a flag */
481	for (fd = 0; fd < anfdmax; ++fd)	1082	for (fd = 0; fd < anfdmax; ++fd)
482	if (anfds [fd].events)	1083	if (anfds [fd].events)
483	{	1084	{
484	anfds [fd].events = 0;	1085	anfds [fd].events = 0;
485	fd_change (EV_A_ fd);	1086	anfds [fd].emask = 0;
		1087	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
486	}	1088	}
487	}	1089	}
488		1090
		1091	/* used to prepare libev internal fd's */
		1092	/* this is not fork-safe */
		1093	inline_speed void
		1094	fd_intern (int fd)
		1095	{
		1096	#ifdef _WIN32
		1097	unsigned long arg = 1;
		1098	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
		1099	#else
		1100	fcntl (fd, F_SETFD, FD_CLOEXEC);
		1101	fcntl (fd, F_SETFL, O_NONBLOCK);
		1102	#endif
		1103	}
		1104
489	/*****************************************************************************/	1105	/*****************************************************************************/
490		1106
		1107	/*
		1108	* the heap functions want a real array index. array index 0 is guaranteed to not
		1109	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		1110	* the branching factor of the d-tree.
		1111	*/
		1112
		1113	/*
		1114	* at the moment we allow libev the luxury of two heaps,
		1115	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		1116	* which is more cache-efficient.
		1117	* the difference is about 5% with 50000+ watchers.
		1118	*/
		1119	#if EV_USE_4HEAP
		1120
		1121	#define DHEAP 4
		1122	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		1123	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		1124	#define UPHEAP_DONE(p,k) ((p) == (k))
		1125
		1126	/* away from the root */
		1127	inline_speed void
		1128	downheap (ANHE *heap, int N, int k)
		1129	{
		1130	ANHE he = heap [k];
		1131	ANHE *E = heap + N + HEAP0;
		1132
		1133	for (;;)
		1134	{
		1135	ev_tstamp minat;
		1136	ANHE *minpos;
		1137	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		1138
		1139	/* find minimum child */
		1140	if (expect_true (pos + DHEAP - 1 < E))
		1141	{
		1142	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1143	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1144	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1145	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1146	}
		1147	else if (pos < E)
		1148	{
		1149	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1150	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1151	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1152	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1153	}
		1154	else
		1155	break;
		1156
		1157	if (ANHE_at (he) <= minat)
		1158	break;
		1159
		1160	heap [k] = *minpos;
		1161	ev_active (ANHE_w (*minpos)) = k;
		1162
		1163	k = minpos - heap;
		1164	}
		1165
		1166	heap [k] = he;
		1167	ev_active (ANHE_w (he)) = k;
		1168	}
		1169
		1170	#else /* 4HEAP */
		1171
		1172	#define HEAP0 1
		1173	#define HPARENT(k) ((k) >> 1)
		1174	#define UPHEAP_DONE(p,k) (!(p))
		1175
		1176	/* away from the root */
		1177	inline_speed void
		1178	downheap (ANHE *heap, int N, int k)
		1179	{
		1180	ANHE he = heap [k];
		1181
		1182	for (;;)
		1183	{
		1184	int c = k << 1;
		1185
		1186	if (c >= N + HEAP0)
		1187	break;
		1188
		1189	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		1190	? 1 : 0;
		1191
		1192	if (ANHE_at (he) <= ANHE_at (heap [c]))
		1193	break;
		1194
		1195	heap [k] = heap [c];
		1196	ev_active (ANHE_w (heap [k])) = k;
		1197
		1198	k = c;
		1199	}
		1200
		1201	heap [k] = he;
		1202	ev_active (ANHE_w (he)) = k;
		1203	}
		1204	#endif
		1205
		1206	/* towards the root */
		1207	inline_speed void
		1208	upheap (ANHE *heap, int k)
		1209	{
		1210	ANHE he = heap [k];
		1211
		1212	for (;;)
		1213	{
		1214	int p = HPARENT (k);
		1215
		1216	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		1217	break;
		1218
		1219	heap [k] = heap [p];
		1220	ev_active (ANHE_w (heap [k])) = k;
		1221	k = p;
		1222	}
		1223
		1224	heap [k] = he;
		1225	ev_active (ANHE_w (he)) = k;
		1226	}
		1227
		1228	/* move an element suitably so it is in a correct place */
		1229	inline_size void
		1230	adjustheap (ANHE *heap, int N, int k)
		1231	{
		1232	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
		1233	upheap (heap, k);
		1234	else
		1235	downheap (heap, N, k);
		1236	}
		1237
		1238	/* rebuild the heap: this function is used only once and executed rarely */
		1239	inline_size void
		1240	reheap (ANHE *heap, int N)
		1241	{
		1242	int i;
		1243
		1244	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		1245	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		1246	for (i = 0; i < N; ++i)
		1247	upheap (heap, i + HEAP0);
		1248	}
		1249
		1250	/*****************************************************************************/
		1251
		1252	/* associate signal watchers to a signal signal */
		1253	typedef struct
		1254	{
		1255	EV_ATOMIC_T pending;
		1256	#if EV_MULTIPLICITY
		1257	EV_P;
		1258	#endif
		1259	WL head;
		1260	} ANSIG;
		1261
		1262	static ANSIG signals [EV_NSIG - 1];
		1263
		1264	/*****************************************************************************/
		1265
		1266	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		1267
		1268	static void noinline
		1269	evpipe_init (EV_P)
		1270	{
		1271	if (!ev_is_active (&pipe_w))
		1272	{
		1273	# if EV_USE_EVENTFD
		1274	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1275	if (evfd < 0 && errno == EINVAL)
		1276	evfd = eventfd (0, 0);
		1277
		1278	if (evfd >= 0)
		1279	{
		1280	evpipe [0] = -1;
		1281	fd_intern (evfd); /* doing it twice doesn't hurt */
		1282	ev_io_set (&pipe_w, evfd, EV_READ);
		1283	}
		1284	else
		1285	# endif
		1286	{
		1287	while (pipe (evpipe))
		1288	ev_syserr ("(libev) error creating signal/async pipe");
		1289
		1290	fd_intern (evpipe [0]);
		1291	fd_intern (evpipe [1]);
		1292	ev_io_set (&pipe_w, evpipe [0], EV_READ);
		1293	}
		1294
		1295	ev_io_start (EV_A_ &pipe_w);
		1296	ev_unref (EV_A); /* watcher should not keep loop alive */
		1297	}
		1298	}
		1299
		1300	inline_size void
		1301	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1302	{
		1303	if (!*flag)
		1304	{
		1305	int old_errno = errno; /* save errno because write might clobber it */
		1306	char dummy;
		1307
		1308	*flag = 1;
		1309
		1310	#if EV_USE_EVENTFD
		1311	if (evfd >= 0)
		1312	{
		1313	uint64_t counter = 1;
		1314	write (evfd, &counter, sizeof (uint64_t));
		1315	}
		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	}
		1327	}
		1328
		1329	/* called whenever the libev signal pipe */
		1330	/* got some events (signal, async) */
491	static void	1331	static void
492	upheap (WT *heap, int k)	1332	pipecb (EV_P_ ev_io *iow, int revents)
493	{	1333	{
494	WT w = heap [k];	1334	int i;
495		1335
496	while (k && heap [k >> 1]->at > w->at)	1336	#if EV_USE_EVENTFD
497	{	1337	if (evfd >= 0)
498	heap [k] = heap [k >> 1];
499	((W)heap [k])->active = k + 1;
500	k >>= 1;
501	}	1338	{
		1339	uint64_t counter;
		1340	read (evfd, &counter, sizeof (uint64_t));
		1341	}
		1342	else
		1343	#endif
		1344	{
		1345	char dummy;
		1346	/* see discussion in evpipe_write when you think this read should be recv in win32 */
		1347	read (evpipe [0], &dummy, 1);
		1348	}
502		1349
503	heap [k] = w;	1350	if (sig_pending)
504	((W)heap [k])->active = k + 1;	1351	{
		1352	sig_pending = 0;
505		1353
		1354	for (i = EV_NSIG - 1; i--; )
		1355	if (expect_false (signals [i].pending))
		1356	ev_feed_signal_event (EV_A_ i + 1);
		1357	}
		1358
		1359	#if EV_ASYNC_ENABLE
		1360	if (async_pending)
		1361	{
		1362	async_pending = 0;
		1363
		1364	for (i = asynccnt; i--; )
		1365	if (asyncs [i]->sent)
		1366	{
		1367	asyncs [i]->sent = 0;
		1368	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1369	}
		1370	}
		1371	#endif
506	}	1372	}
		1373
		1374	/*****************************************************************************/
507		1375
508	static void	1376	static void
509	downheap (WT *heap, int N, int k)
510	{
511	WT w = heap [k];
512
513	while (k < (N >> 1))
514	{
515	int j = k << 1;
516
517	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
518	++j;
519
520	if (w->at <= heap [j]->at)
521	break;
522
523	heap [k] = heap [j];
524	((W)heap [k])->active = k + 1;
525	k = j;
526	}
527
528	heap [k] = w;
529	((W)heap [k])->active = k + 1;
530	}
531
532	inline void
533	adjustheap (WT *heap, int N, int k, ev_tstamp at)
534	{
535	ev_tstamp old_at = heap [k]->at;
536	heap [k]->at = at;
537
538	if (old_at < at)
539	downheap (heap, N, k);
540	else
541	upheap (heap, k);
542	}
543
544	/*****************************************************************************/
545
546	typedef struct
547	{
548	WL head;
549	sig_atomic_t volatile gotsig;
550	} ANSIG;
551
552	static ANSIG *signals;
553	static int signalmax;
554
555	static int sigpipe [2];
556	static sig_atomic_t volatile gotsig;
557	static struct ev_io sigev;
558
559	static void
560	signals_init (ANSIG *base, int count)
561	{
562	while (count--)
563	{
564	base->head = 0;
565	base->gotsig = 0;
566
567	++base;
568	}
569	}
570
571	static void
572	sighandler (int signum)	1377	ev_sighandler (int signum)
573	{	1378	{
574	#if WIN32	1379	#if EV_MULTIPLICITY
575	signal (signum, sighandler);	1380	EV_P = signals [signum - 1].loop;
576	#endif	1381	#endif
577		1382
578	signals [signum - 1].gotsig = 1;
579
580	if (!gotsig)
581	{
582	int old_errno = errno;
583	gotsig = 1;
584	#ifdef WIN32	1383	#ifdef _WIN32
585	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);	1384	signal (signum, ev_sighandler);
586	#else
587	write (sigpipe [1], &signum, 1);
588	#endif	1385	#endif
589	errno = old_errno;
590	}
591	}
592		1386
593	void	1387	signals [signum - 1].pending = 1;
		1388	evpipe_write (EV_A_ &sig_pending);
		1389	}
		1390
		1391	void noinline
594	ev_feed_signal_event (EV_P_ int signum)	1392	ev_feed_signal_event (EV_P_ int signum)
595	{	1393	{
596	WL w;	1394	WL w;
597		1395
		1396	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1397	return;
		1398
		1399	--signum;
		1400
598	#if EV_MULTIPLICITY	1401	#if EV_MULTIPLICITY
599	assert (("feeding signal events is only supported in the default loop", loop == default_loop));	1402	/* it is permissible to try to feed a signal to the wrong loop */
600	#endif	1403	/* or, likely more useful, feeding a signal nobody is waiting for */
601		1404
602	--signum;	1405	if (expect_false (signals [signum].loop != EV_A))
603
604	if (signum < 0 || signum >= signalmax)
605	return;	1406	return;
		1407	#endif
606		1408
607	signals [signum].gotsig = 0;	1409	signals [signum].pending = 0;
608		1410
609	for (w = signals [signum].head; w; w = w->next)	1411	for (w = signals [signum].head; w; w = w->next)
610	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1412	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
611	}	1413	}
612		1414
		1415	#if EV_USE_SIGNALFD
613	static void	1416	static void
614	sigcb (EV_P_ struct ev_io *iow, int revents)	1417	sigfdcb (EV_P_ ev_io *iow, int revents)
615	{	1418	{
616	int signum;	1419	struct signalfd_siginfo si[2], *sip; /* these structs are big */
617		1420
618	#ifdef WIN32	1421	for (;;)
619	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);	1422	{
620	#else	1423	ssize_t res = read (sigfd, si, sizeof (si));
621	read (sigpipe [0], &revents, 1);
622	#endif
623	gotsig = 0;
624		1424
625	for (signum = signalmax; signum--; )	1425	/* not ISO-C, as res might be -1, but works with SuS */
626	if (signals [signum].gotsig)	1426	for (sip = si; (char *)sip < (char *)si + res; ++sip)
627	ev_feed_signal_event (EV_A_ signum + 1);	1427	ev_feed_signal_event (EV_A_ sip->ssi_signo);
628	}
629		1428
630	static void	1429	if (res < (ssize_t)sizeof (si))
631	siginit (EV_P)	1430	break;
632	{	1431	}
633	#ifndef WIN32
634	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
635	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
636
637	/* rather than sort out wether we really need nb, set it */
638	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
639	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
640	#endif
641
642	ev_io_set (&sigev, sigpipe [0], EV_READ);
643	ev_io_start (EV_A_ &sigev);
644	ev_unref (EV_A); /* child watcher should not keep loop alive */
645	}	1432	}
		1433	#endif
		1434
		1435	#endif
646		1436
647	/*****************************************************************************/	1437	/*****************************************************************************/
648		1438
649	static struct ev_child *childs [PID_HASHSIZE];	1439	#if EV_CHILD_ENABLE
		1440	static WL childs [EV_PID_HASHSIZE];
650		1441
651	#ifndef WIN32
652
653	static struct ev_signal childev;	1442	static ev_signal childev;
		1443
		1444	#ifndef WIFCONTINUED
		1445	# define WIFCONTINUED(status) 0
		1446	#endif
		1447
		1448	/* handle a single child status event */
		1449	inline_speed void
		1450	child_reap (EV_P_ int chain, int pid, int status)
		1451	{
		1452	ev_child *w;
		1453	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1454
		1455	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		1456	{
		1457	if ((w->pid == pid || !w->pid)
		1458	&& (!traced || (w->flags & 1)))
		1459	{
		1460	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1461	w->rpid = pid;
		1462	w->rstatus = status;
		1463	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1464	}
		1465	}
		1466	}
654		1467
655	#ifndef WCONTINUED	1468	#ifndef WCONTINUED
656	# define WCONTINUED 0	1469	# define WCONTINUED 0
657	#endif	1470	#endif
658		1471
		1472	/* called on sigchld etc., calls waitpid */
659	static void	1473	static void
660	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
661	{
662	struct ev_child *w;
663
664	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
665	if (w->pid == pid || !w->pid)
666	{
667	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
668	w->rpid = pid;
669	w->rstatus = status;
670	ev_feed_event (EV_A_ (W)w, EV_CHILD);
671	}
672	}
673
674	static void
675	childcb (EV_P_ struct ev_signal *sw, int revents)	1474	childcb (EV_P_ ev_signal *sw, int revents)
676	{	1475	{
677	int pid, status;	1476	int pid, status;
678		1477
		1478	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
679	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1479	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
680	{	1480	if (!WCONTINUED
		1481	|| errno != EINVAL
		1482	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1483	return;
		1484
681	/* make sure we are called again until all childs have been reaped */	1485	/* make sure we are called again until all children have been reaped */
		1486	/* we need to do it this way so that the callback gets called before we continue */
682	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1487	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
683		1488
684	child_reap (EV_A_ sw, pid, pid, status);	1489	child_reap (EV_A_ pid, pid, status);
		1490	if ((EV_PID_HASHSIZE) > 1)
685	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1491	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
686	}
687	}	1492	}
688		1493
689	#endif	1494	#endif
690		1495
691	/*****************************************************************************/	1496	/*****************************************************************************/
692		1497
		1498	#if EV_USE_IOCP
		1499	# include "ev_iocp.c"
		1500	#endif
		1501	#if EV_USE_PORT
		1502	# include "ev_port.c"
		1503	#endif
693	#if EV_USE_KQUEUE	1504	#if EV_USE_KQUEUE
694	# include "ev_kqueue.c"	1505	# include "ev_kqueue.c"
695	#endif	1506	#endif
696	#if EV_USE_EPOLL	1507	#if EV_USE_EPOLL
697	# include "ev_epoll.c"	1508	# include "ev_epoll.c"
…		…
714	{	1525	{
715	return EV_VERSION_MINOR;	1526	return EV_VERSION_MINOR;
716	}	1527	}
717		1528
718	/* return true if we are running with elevated privileges and should ignore env variables */	1529	/* return true if we are running with elevated privileges and should ignore env variables */
719	static int	1530	int inline_size
720	enable_secure (void)	1531	enable_secure (void)
721	{	1532	{
722	#ifdef WIN32	1533	#ifdef _WIN32
723	return 0;	1534	return 0;
724	#else	1535	#else
725	return getuid () != geteuid ()	1536	return getuid () != geteuid ()
726	|| getgid () != getegid ();	1537	|| getgid () != getegid ();
727	#endif	1538	#endif
728	}	1539	}
729		1540
730	int	1541	unsigned int
		1542	ev_supported_backends (void)
		1543	{
		1544	unsigned int flags = 0;
		1545
		1546	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1547	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1548	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1549	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1550	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1551
		1552	return flags;
		1553	}
		1554
		1555	unsigned int
		1556	ev_recommended_backends (void)
		1557	{
		1558	unsigned int flags = ev_supported_backends ();
		1559
		1560	#ifndef __NetBSD__
		1561	/* kqueue is borked on everything but netbsd apparently */
		1562	/* it usually doesn't work correctly on anything but sockets and pipes */
		1563	flags &= ~EVBACKEND_KQUEUE;
		1564	#endif
		1565	#ifdef __APPLE__
		1566	/* only select works correctly on that "unix-certified" platform */
		1567	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1568	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		1569	#endif
		1570	#ifdef __FreeBSD__
		1571	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
		1572	#endif
		1573
		1574	return flags;
		1575	}
		1576
		1577	unsigned int
		1578	ev_embeddable_backends (void)
		1579	{
		1580	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1581
		1582	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1583	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
		1584	flags &= ~EVBACKEND_EPOLL;
		1585
		1586	return flags;
		1587	}
		1588
		1589	unsigned int
		1590	ev_backend (EV_P)
		1591	{
		1592	return backend;
		1593	}
		1594
		1595	#if EV_FEATURE_API
		1596	unsigned int
		1597	ev_iteration (EV_P)
		1598	{
		1599	return loop_count;
		1600	}
		1601
		1602	unsigned int
731	ev_method (EV_P)	1603	ev_depth (EV_P)
732	{	1604	{
733	return method;	1605	return loop_depth;
734	}	1606	}
735		1607
736	static void	1608	void
737	loop_init (EV_P_ int methods)	1609	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
738	{	1610	{
739	if (!method)	1611	io_blocktime = interval;
		1612	}
		1613
		1614	void
		1615	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1616	{
		1617	timeout_blocktime = interval;
		1618	}
		1619
		1620	void
		1621	ev_set_userdata (EV_P_ void *data)
		1622	{
		1623	userdata = data;
		1624	}
		1625
		1626	void *
		1627	ev_userdata (EV_P)
		1628	{
		1629	return userdata;
		1630	}
		1631
		1632	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1633	{
		1634	invoke_cb = invoke_pending_cb;
		1635	}
		1636
		1637	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1638	{
		1639	release_cb = release;
		1640	acquire_cb = acquire;
		1641	}
		1642	#endif
		1643
		1644	/* initialise a loop structure, must be zero-initialised */
		1645	static void noinline
		1646	loop_init (EV_P_ unsigned int flags)
		1647	{
		1648	if (!backend)
740	{	1649	{
		1650	#if EV_USE_REALTIME
		1651	if (!have_realtime)
		1652	{
		1653	struct timespec ts;
		1654
		1655	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1656	have_realtime = 1;
		1657	}
		1658	#endif
		1659
741	#if EV_USE_MONOTONIC	1660	#if EV_USE_MONOTONIC
		1661	if (!have_monotonic)
		1662	{
		1663	struct timespec ts;
		1664
		1665	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1666	have_monotonic = 1;
		1667	}
		1668	#endif
		1669
		1670	/* pid check not overridable via env */
		1671	#ifndef _WIN32
		1672	if (flags & EVFLAG_FORKCHECK)
		1673	curpid = getpid ();
		1674	#endif
		1675
		1676	if (!(flags & EVFLAG_NOENV)
		1677	&& !enable_secure ()
		1678	&& getenv ("LIBEV_FLAGS"))
		1679	flags = atoi (getenv ("LIBEV_FLAGS"));
		1680
		1681	ev_rt_now = ev_time ();
		1682	mn_now = get_clock ();
		1683	now_floor = mn_now;
		1684	rtmn_diff = ev_rt_now - mn_now;
		1685	#if EV_FEATURE_API
		1686	invoke_cb = ev_invoke_pending;
		1687	#endif
		1688
		1689	io_blocktime = 0.;
		1690	timeout_blocktime = 0.;
		1691	backend = 0;
		1692	backend_fd = -1;
		1693	sig_pending = 0;
		1694	#if EV_ASYNC_ENABLE
		1695	async_pending = 0;
		1696	#endif
		1697	#if EV_USE_INOTIFY
		1698	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
		1699	#endif
		1700	#if EV_USE_SIGNALFD
		1701	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
		1702	#endif
		1703
		1704	if (!(flags & 0x0000ffffU))
		1705	flags |= ev_recommended_backends ();
		1706
		1707	#if EV_USE_IOCP
		1708	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1709	#endif
		1710	#if EV_USE_PORT
		1711	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1712	#endif
		1713	#if EV_USE_KQUEUE
		1714	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1715	#endif
		1716	#if EV_USE_EPOLL
		1717	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1718	#endif
		1719	#if EV_USE_POLL
		1720	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1721	#endif
		1722	#if EV_USE_SELECT
		1723	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1724	#endif
		1725
		1726	ev_prepare_init (&pending_w, pendingcb);
		1727
		1728	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		1729	ev_init (&pipe_w, pipecb);
		1730	ev_set_priority (&pipe_w, EV_MAXPRI);
		1731	#endif
		1732	}
		1733	}
		1734
		1735	/* free up a loop structure */
		1736	static void noinline
		1737	loop_destroy (EV_P)
		1738	{
		1739	int i;
		1740
		1741	if (ev_is_active (&pipe_w))
		1742	{
		1743	/*ev_ref (EV_A);*/
		1744	/*ev_io_stop (EV_A_ &pipe_w);*/
		1745
		1746	#if EV_USE_EVENTFD
		1747	if (evfd >= 0)
		1748	close (evfd);
		1749	#endif
		1750
		1751	if (evpipe [0] >= 0)
		1752	{
		1753	EV_WIN32_CLOSE_FD (evpipe [0]);
		1754	EV_WIN32_CLOSE_FD (evpipe [1]);
		1755	}
		1756	}
		1757
		1758	#if EV_USE_SIGNALFD
		1759	if (ev_is_active (&sigfd_w))
		1760	close (sigfd);
		1761	#endif
		1762
		1763	#if EV_USE_INOTIFY
		1764	if (fs_fd >= 0)
		1765	close (fs_fd);
		1766	#endif
		1767
		1768	if (backend_fd >= 0)
		1769	close (backend_fd);
		1770
		1771	#if EV_USE_IOCP
		1772	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1773	#endif
		1774	#if EV_USE_PORT
		1775	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1776	#endif
		1777	#if EV_USE_KQUEUE
		1778	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1779	#endif
		1780	#if EV_USE_EPOLL
		1781	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1782	#endif
		1783	#if EV_USE_POLL
		1784	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1785	#endif
		1786	#if EV_USE_SELECT
		1787	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1788	#endif
		1789
		1790	for (i = NUMPRI; i--; )
		1791	{
		1792	array_free (pending, [i]);
		1793	#if EV_IDLE_ENABLE
		1794	array_free (idle, [i]);
		1795	#endif
		1796	}
		1797
		1798	ev_free (anfds); anfds = 0; anfdmax = 0;
		1799
		1800	/* have to use the microsoft-never-gets-it-right macro */
		1801	array_free (rfeed, EMPTY);
		1802	array_free (fdchange, EMPTY);
		1803	array_free (timer, EMPTY);
		1804	#if EV_PERIODIC_ENABLE
		1805	array_free (periodic, EMPTY);
		1806	#endif
		1807	#if EV_FORK_ENABLE
		1808	array_free (fork, EMPTY);
		1809	#endif
		1810	array_free (prepare, EMPTY);
		1811	array_free (check, EMPTY);
		1812	#if EV_ASYNC_ENABLE
		1813	array_free (async, EMPTY);
		1814	#endif
		1815
		1816	backend = 0;
		1817	}
		1818
		1819	#if EV_USE_INOTIFY
		1820	inline_size void infy_fork (EV_P);
		1821	#endif
		1822
		1823	inline_size void
		1824	loop_fork (EV_P)
		1825	{
		1826	#if EV_USE_PORT
		1827	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1828	#endif
		1829	#if EV_USE_KQUEUE
		1830	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1831	#endif
		1832	#if EV_USE_EPOLL
		1833	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1834	#endif
		1835	#if EV_USE_INOTIFY
		1836	infy_fork (EV_A);
		1837	#endif
		1838
		1839	if (ev_is_active (&pipe_w))
		1840	{
		1841	/* this "locks" the handlers against writing to the pipe */
		1842	/* while we modify the fd vars */
		1843	sig_pending = 1;
		1844	#if EV_ASYNC_ENABLE
		1845	async_pending = 1;
		1846	#endif
		1847
		1848	ev_ref (EV_A);
		1849	ev_io_stop (EV_A_ &pipe_w);
		1850
		1851	#if EV_USE_EVENTFD
		1852	if (evfd >= 0)
		1853	close (evfd);
		1854	#endif
		1855
		1856	if (evpipe [0] >= 0)
		1857	{
		1858	EV_WIN32_CLOSE_FD (evpipe [0]);
		1859	EV_WIN32_CLOSE_FD (evpipe [1]);
		1860	}
		1861
		1862	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		1863	evpipe_init (EV_A);
		1864	/* now iterate over everything, in case we missed something */
		1865	pipecb (EV_A_ &pipe_w, EV_READ);
		1866	#endif
		1867	}
		1868
		1869	postfork = 0;
		1870	}
		1871
		1872	#if EV_MULTIPLICITY
		1873
		1874	struct ev_loop *
		1875	ev_loop_new (unsigned int flags)
		1876	{
		1877	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1878
		1879	memset (EV_A, 0, sizeof (struct ev_loop));
		1880	loop_init (EV_A_ flags);
		1881
		1882	if (ev_backend (EV_A))
		1883	return EV_A;
		1884
		1885	return 0;
		1886	}
		1887
		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 */
		1901
		1902	#if EV_VERIFY
		1903	static void noinline
		1904	verify_watcher (EV_P_ W w)
		1905	{
		1906	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1907
		1908	if (w->pending)
		1909	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1910	}
		1911
		1912	static void noinline
		1913	verify_heap (EV_P_ ANHE *heap, int N)
		1914	{
		1915	int i;
		1916
		1917	for (i = HEAP0; i < N + HEAP0; ++i)
		1918	{
		1919	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1920	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1921	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1922
		1923	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1924	}
		1925	}
		1926
		1927	static void noinline
		1928	array_verify (EV_P_ W *ws, int cnt)
		1929	{
		1930	while (cnt--)
		1931	{
		1932	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1933	verify_watcher (EV_A_ ws [cnt]);
		1934	}
		1935	}
		1936	#endif
		1937
		1938	#if EV_FEATURE_API
		1939	void
		1940	ev_verify (EV_P)
		1941	{
		1942	#if EV_VERIFY
		1943	int i;
		1944	WL w;
		1945
		1946	assert (activecnt >= -1);
		1947
		1948	assert (fdchangemax >= fdchangecnt);
		1949	for (i = 0; i < fdchangecnt; ++i)
		1950	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		1951
		1952	assert (anfdmax >= 0);
		1953	for (i = 0; i < anfdmax; ++i)
		1954	for (w = anfds [i].head; w; w = w->next)
742	{	1955	{
743	struct timespec ts;	1956	verify_watcher (EV_A_ (W)w);
744	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1957	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
745	have_monotonic = 1;	1958	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
746	}	1959	}
747	#endif
748		1960
749	ev_rt_now = ev_time ();	1961	assert (timermax >= timercnt);
750	mn_now = get_clock ();	1962	verify_heap (EV_A_ timers, timercnt);
751	now_floor = mn_now;
752	rtmn_diff = ev_rt_now - mn_now;
753		1963
754	if (methods == EVMETHOD_AUTO)	1964	#if EV_PERIODIC_ENABLE
755	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1965	assert (periodicmax >= periodiccnt);
756	methods = atoi (getenv ("LIBEV_METHODS"));	1966	verify_heap (EV_A_ periodics, periodiccnt);
757	else
758	methods = EVMETHOD_ANY;
759
760	method = 0;
761	#if EV_USE_WIN32
762	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
763	#endif
764	#if EV_USE_KQUEUE
765	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
766	#endif
767	#if EV_USE_EPOLL
768	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
769	#endif
770	#if EV_USE_POLL
771	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
772	#endif
773	#if EV_USE_SELECT
774	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
775	#endif
776
777	ev_init (&sigev, sigcb);
778	ev_set_priority (&sigev, EV_MAXPRI);
779	}
780	}
781
782	void
783	loop_destroy (EV_P)
784	{
785	int i;
786
787	#if EV_USE_WIN32
788	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
789	#endif
790	#if EV_USE_KQUEUE
791	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
792	#endif
793	#if EV_USE_EPOLL
794	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
795	#endif
796	#if EV_USE_POLL
797	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
798	#endif
799	#if EV_USE_SELECT
800	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
801	#endif	1967	#endif
802		1968
803	for (i = NUMPRI; i--; )	1969	for (i = NUMPRI; i--; )
804	array_free (pending, [i]);	1970	{
		1971	assert (pendingmax [i] >= pendingcnt [i]);
		1972	#if EV_IDLE_ENABLE
		1973	assert (idleall >= 0);
		1974	assert (idlemax [i] >= idlecnt [i]);
		1975	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1976	#endif
		1977	}
805		1978
806	/* have to use the microsoft-never-gets-it-right macro */	1979	#if EV_FORK_ENABLE
807	array_free_microshit (fdchange);	1980	assert (forkmax >= forkcnt);
808	array_free_microshit (timer);	1981	array_verify (EV_A_ (W *)forks, forkcnt);
809	array_free_microshit (periodic);	1982	#endif
810	array_free_microshit (idle);
811	array_free_microshit (prepare);
812	array_free_microshit (check);
813		1983
814	method = 0;	1984	#if EV_ASYNC_ENABLE
815	}	1985	assert (asyncmax >= asynccnt);
		1986	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1987	#endif
816		1988
817	static void	1989	#if EV_PREPARE_ENABLE
818	loop_fork (EV_P)	1990	assert (preparemax >= preparecnt);
819	{	1991	array_verify (EV_A_ (W *)prepares, preparecnt);
820	#if EV_USE_EPOLL	1992	#endif
821	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1993
		1994	#if EV_CHECK_ENABLE
		1995	assert (checkmax >= checkcnt);
		1996	array_verify (EV_A_ (W *)checks, checkcnt);
		1997	#endif
		1998
		1999	# if 0
		2000	#if EV_CHILD_ENABLE
		2001	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		2002	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		2003	#endif
822	#endif	2004	# endif
823	#if EV_USE_KQUEUE
824	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
825	#endif	2005	#endif
826
827	if (ev_is_active (&sigev))
828	{
829	/* default loop */
830
831	ev_ref (EV_A);
832	ev_io_stop (EV_A_ &sigev);
833	close (sigpipe [0]);
834	close (sigpipe [1]);
835
836	while (pipe (sigpipe))
837	syserr ("(libev) error creating pipe");
838
839	siginit (EV_A);
840	}
841
842	postfork = 0;
843	}	2006	}
		2007	#endif
844		2008
845	#if EV_MULTIPLICITY	2009	#if EV_MULTIPLICITY
846	struct ev_loop *	2010	struct ev_loop *
847	ev_loop_new (int methods)	2011	ev_default_loop_init (unsigned int flags)
848	{
849	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
850
851	memset (loop, 0, sizeof (struct ev_loop));
852
853	loop_init (EV_A_ methods);
854
855	if (ev_method (EV_A))
856	return loop;
857
858	return 0;
859	}
860
861	void
862	ev_loop_destroy (EV_P)
863	{
864	loop_destroy (EV_A);
865	ev_free (loop);
866	}
867
868	void
869	ev_loop_fork (EV_P)
870	{
871	postfork = 1;
872	}
873
874	#endif
875
876	#if EV_MULTIPLICITY
877	struct ev_loop *
878	#else	2012	#else
879	int	2013	int
		2014	ev_default_loop (unsigned int flags)
880	#endif	2015	#endif
881	ev_default_loop (int methods)
882	{	2016	{
883	if (sigpipe [0] == sigpipe [1])
884	if (pipe (sigpipe))
885	return 0;
886
887	if (!default_loop)	2017	if (!ev_default_loop_ptr)
888	{	2018	{
889	#if EV_MULTIPLICITY	2019	#if EV_MULTIPLICITY
890	struct ev_loop *loop = default_loop = &default_loop_struct;	2020	EV_P = ev_default_loop_ptr = &default_loop_struct;
891	#else	2021	#else
892	default_loop = 1;	2022	ev_default_loop_ptr = 1;
893	#endif	2023	#endif
894		2024
895	loop_init (EV_A_ methods);	2025	loop_init (EV_A_ flags);
896		2026
897	if (ev_method (EV_A))	2027	if (ev_backend (EV_A))
898	{	2028	{
899	siginit (EV_A);	2029	#if EV_CHILD_ENABLE
900
901	#ifndef WIN32
902	ev_signal_init (&childev, childcb, SIGCHLD);	2030	ev_signal_init (&childev, childcb, SIGCHLD);
903	ev_set_priority (&childev, EV_MAXPRI);	2031	ev_set_priority (&childev, EV_MAXPRI);
904	ev_signal_start (EV_A_ &childev);	2032	ev_signal_start (EV_A_ &childev);
905	ev_unref (EV_A); /* child watcher should not keep loop alive */	2033	ev_unref (EV_A); /* child watcher should not keep loop alive */
906	#endif	2034	#endif
907	}	2035	}
908	else	2036	else
909	default_loop = 0;	2037	ev_default_loop_ptr = 0;
910	}	2038	}
911		2039
912	return default_loop;	2040	return ev_default_loop_ptr;
913	}	2041	}
914		2042
915	void	2043	void
916	ev_default_destroy (void)	2044	ev_default_destroy (void)
917	{	2045	{
918	#if EV_MULTIPLICITY	2046	#if EV_MULTIPLICITY
919	struct ev_loop *loop = default_loop;	2047	EV_P = ev_default_loop_ptr;
920	#endif	2048	#endif
921		2049
922	#ifndef WIN32	2050	ev_default_loop_ptr = 0;
		2051
		2052	#if EV_CHILD_ENABLE
923	ev_ref (EV_A); /* child watcher */	2053	ev_ref (EV_A); /* child watcher */
924	ev_signal_stop (EV_A_ &childev);	2054	ev_signal_stop (EV_A_ &childev);
925	#endif	2055	#endif
926		2056
927	ev_ref (EV_A); /* signal watcher */
928	ev_io_stop (EV_A_ &sigev);
929
930	close (sigpipe [0]); sigpipe [0] = 0;
931	close (sigpipe [1]); sigpipe [1] = 0;
932
933	loop_destroy (EV_A);	2057	loop_destroy (EV_A);
934	}	2058	}
935		2059
936	void	2060	void
937	ev_default_fork (void)	2061	ev_default_fork (void)
938	{	2062	{
939	#if EV_MULTIPLICITY	2063	#if EV_MULTIPLICITY
940	struct ev_loop *loop = default_loop;	2064	EV_P = ev_default_loop_ptr;
941	#endif	2065	#endif
942		2066
943	if (method)	2067	postfork = 1; /* must be in line with ev_loop_fork */
944	postfork = 1;
945	}	2068	}
946		2069
947	/*****************************************************************************/	2070	/*****************************************************************************/
948		2071
949	static int	2072	void
950	any_pending (EV_P)	2073	ev_invoke (EV_P_ void *w, int revents)
		2074	{
		2075	EV_CB_INVOKE ((W)w, revents);
		2076	}
		2077
		2078	unsigned int
		2079	ev_pending_count (EV_P)
951	{	2080	{
952	int pri;	2081	int pri;
		2082	unsigned int count = 0;
953		2083
954	for (pri = NUMPRI; pri--; )	2084	for (pri = NUMPRI; pri--; )
955	if (pendingcnt [pri])	2085	count += pendingcnt [pri];
956	return 1;
957		2086
958	return 0;	2087	return count;
959	}	2088	}
960		2089
961	static void	2090	void noinline
962	call_pending (EV_P)	2091	ev_invoke_pending (EV_P)
963	{	2092	{
964	int pri;	2093	int pri;
965		2094
966	for (pri = NUMPRI; pri--; )	2095	for (pri = NUMPRI; pri--; )
967	while (pendingcnt [pri])	2096	while (pendingcnt [pri])
968	{	2097	{
969	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2098	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
970		2099
971	if (p->w)	2100	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
972	{	2101	/* ^ this is no longer true, as pending_w could be here */
		2102
973	p->w->pending = 0;	2103	p->w->pending = 0;
974	EV_CB_INVOKE (p->w, p->events);	2104	EV_CB_INVOKE (p->w, p->events);
975	}	2105	EV_FREQUENT_CHECK;
976	}	2106	}
977	}	2107	}
978		2108
979	static void	2109	#if EV_IDLE_ENABLE
		2110	/* make idle watchers pending. this handles the "call-idle */
		2111	/* only when higher priorities are idle" logic */
		2112	inline_size void
		2113	idle_reify (EV_P)
		2114	{
		2115	if (expect_false (idleall))
		2116	{
		2117	int pri;
		2118
		2119	for (pri = NUMPRI; pri--; )
		2120	{
		2121	if (pendingcnt [pri])
		2122	break;
		2123
		2124	if (idlecnt [pri])
		2125	{
		2126	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		2127	break;
		2128	}
		2129	}
		2130	}
		2131	}
		2132	#endif
		2133
		2134	/* make timers pending */
		2135	inline_size void
980	timers_reify (EV_P)	2136	timers_reify (EV_P)
981	{	2137	{
		2138	EV_FREQUENT_CHECK;
		2139
982	while (timercnt && ((WT)timers [0])->at <= mn_now)	2140	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
983	{	2141	{
984	struct ev_timer *w = timers [0];	2142	do
985
986	assert (("inactive timer on timer heap detected", ev_is_active (w)));
987
988	/* first reschedule or stop timer */
989	if (w->repeat)
990	{	2143	{
		2144	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		2145
		2146	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		2147
		2148	/* first reschedule or stop timer */
		2149	if (w->repeat)
		2150	{
		2151	ev_at (w) += w->repeat;
		2152	if (ev_at (w) < mn_now)
		2153	ev_at (w) = mn_now;
		2154
991	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	2155	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
992	((WT)w)->at = mn_now + w->repeat;	2156
		2157	ANHE_at_cache (timers [HEAP0]);
993	downheap ((WT *)timers, timercnt, 0);	2158	downheap (timers, timercnt, HEAP0);
		2159	}
		2160	else
		2161	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2162
		2163	EV_FREQUENT_CHECK;
		2164	feed_reverse (EV_A_ (W)w);
994	}	2165	}
995	else	2166	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
996	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
997		2167
998	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	2168	feed_reverse_done (EV_A_ EV_TIMER);
999	}	2169	}
1000	}	2170	}
1001		2171
1002	static void	2172	#if EV_PERIODIC_ENABLE
		2173	/* make periodics pending */
		2174	inline_size void
1003	periodics_reify (EV_P)	2175	periodics_reify (EV_P)
1004	{	2176	{
		2177	EV_FREQUENT_CHECK;
		2178
1005	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	2179	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1006	{	2180	{
1007	struct ev_periodic *w = periodics [0];	2181	int feed_count = 0;
1008		2182
		2183	do
		2184	{
		2185	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2186
1009	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	2187	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1010		2188
1011	/* first reschedule or stop timer */	2189	/* first reschedule or stop timer */
		2190	if (w->reschedule_cb)
		2191	{
		2192	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2193
		2194	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		2195
		2196	ANHE_at_cache (periodics [HEAP0]);
		2197	downheap (periodics, periodiccnt, HEAP0);
		2198	}
		2199	else if (w->interval)
		2200	{
		2201	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2202	/* if next trigger time is not sufficiently in the future, put it there */
		2203	/* this might happen because of floating point inexactness */
		2204	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2205	{
		2206	ev_at (w) += w->interval;
		2207
		2208	/* if interval is unreasonably low we might still have a time in the past */
		2209	/* so correct this. this will make the periodic very inexact, but the user */
		2210	/* has effectively asked to get triggered more often than possible */
		2211	if (ev_at (w) < ev_rt_now)
		2212	ev_at (w) = ev_rt_now;
		2213	}
		2214
		2215	ANHE_at_cache (periodics [HEAP0]);
		2216	downheap (periodics, periodiccnt, HEAP0);
		2217	}
		2218	else
		2219	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2220
		2221	EV_FREQUENT_CHECK;
		2222	feed_reverse (EV_A_ (W)w);
		2223	}
		2224	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		2225
		2226	feed_reverse_done (EV_A_ EV_PERIODIC);
		2227	}
		2228	}
		2229
		2230	/* simply recalculate all periodics */
		2231	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		2232	static void noinline
		2233	periodics_reschedule (EV_P)
		2234	{
		2235	int i;
		2236
		2237	/* adjust periodics after time jump */
		2238	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		2239	{
		2240	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		2241
1012	if (w->reschedule_cb)	2242	if (w->reschedule_cb)
		2243	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2244	else if (w->interval)
		2245	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2246
		2247	ANHE_at_cache (periodics [i]);
		2248	}
		2249
		2250	reheap (periodics, periodiccnt);
		2251	}
		2252	#endif
		2253
		2254	/* adjust all timers by a given offset */
		2255	static void noinline
		2256	timers_reschedule (EV_P_ ev_tstamp adjust)
		2257	{
		2258	int i;
		2259
		2260	for (i = 0; i < timercnt; ++i)
		2261	{
		2262	ANHE *he = timers + i + HEAP0;
		2263	ANHE_w (*he)->at += adjust;
		2264	ANHE_at_cache (*he);
		2265	}
		2266	}
		2267
		2268	/* fetch new monotonic and realtime times from the kernel */
		2269	/* also detect if there was a timejump, and act accordingly */
		2270	inline_speed void
		2271	time_update (EV_P_ ev_tstamp max_block)
		2272	{
		2273	#if EV_USE_MONOTONIC
		2274	if (expect_true (have_monotonic))
		2275	{
		2276	int i;
		2277	ev_tstamp odiff = rtmn_diff;
		2278
		2279	mn_now = get_clock ();
		2280
		2281	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		2282	/* interpolate in the meantime */
		2283	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1013	{	2284	{
1014	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	2285	ev_rt_now = rtmn_diff + mn_now;
1015		2286	return;
1016	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1017	downheap ((WT *)periodics, periodiccnt, 0);
1018	}	2287	}
1019	else if (w->interval)
1020	{
1021	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1022	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1023	downheap ((WT *)periodics, periodiccnt, 0);
1024	}
1025	else
1026	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1027		2288
1028	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1029	}
1030	}
1031
1032	static void
1033	periodics_reschedule (EV_P)
1034	{
1035	int i;
1036
1037	/* adjust periodics after time jump */
1038	for (i = 0; i < periodiccnt; ++i)
1039	{
1040	struct ev_periodic *w = periodics [i];
1041
1042	if (w->reschedule_cb)
1043	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1044	else if (w->interval)
1045	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1046	}
1047
1048	/* now rebuild the heap */
1049	for (i = periodiccnt >> 1; i--; )
1050	downheap ((WT *)periodics, periodiccnt, i);
1051	}
1052
1053	inline int
1054	time_update_monotonic (EV_P)
1055	{
1056	mn_now = get_clock ();
1057
1058	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059	{
1060	ev_rt_now = rtmn_diff + mn_now;
1061	return 0;
1062	}
1063	else
1064	{
1065	now_floor = mn_now;	2289	now_floor = mn_now;
1066	ev_rt_now = ev_time ();	2290	ev_rt_now = ev_time ();
1067	return 1;
1068	}
1069	}
1070		2291
1071	static void	2292	/* loop a few times, before making important decisions.
1072	time_update (EV_P)	2293	* on the choice of "4": one iteration isn't enough,
1073	{	2294	* in case we get preempted during the calls to
1074	int i;	2295	* ev_time and get_clock. a second call is almost guaranteed
1075		2296	* to succeed in that case, though. and looping a few more times
1076	#if EV_USE_MONOTONIC	2297	* doesn't hurt either as we only do this on time-jumps or
1077	if (expect_true (have_monotonic))	2298	* in the unlikely event of having been preempted here.
1078	{	2299	*/
1079	if (time_update_monotonic (EV_A))	2300	for (i = 4; --i; )
1080	{	2301	{
1081	ev_tstamp odiff = rtmn_diff;
1082
1083	for (i = 4; --i; ) /* loop a few times, before making important decisions */
1084	{
1085	rtmn_diff = ev_rt_now - mn_now;	2302	rtmn_diff = ev_rt_now - mn_now;
1086		2303
1087	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	2304	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1088	return; /* all is well */	2305	return; /* all is well */
1089		2306
1090	ev_rt_now = ev_time ();	2307	ev_rt_now = ev_time ();
1091	mn_now = get_clock ();	2308	mn_now = get_clock ();
1092	now_floor = mn_now;	2309	now_floor = mn_now;
1093	}	2310	}
1094		2311
		2312	/* no timer adjustment, as the monotonic clock doesn't jump */
		2313	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		2314	# if EV_PERIODIC_ENABLE
		2315	periodics_reschedule (EV_A);
		2316	# endif
		2317	}
		2318	else
		2319	#endif
		2320	{
		2321	ev_rt_now = ev_time ();
		2322
		2323	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		2324	{
		2325	/* adjust timers. this is easy, as the offset is the same for all of them */
		2326	timers_reschedule (EV_A_ ev_rt_now - mn_now);
		2327	#if EV_PERIODIC_ENABLE
1095	periodics_reschedule (EV_A);	2328	periodics_reschedule (EV_A);
1096	/* no timer adjustment, as the monotonic clock doesn't jump */	2329	#endif
1097	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1098	}	2330	}
1099	}
1100	else
1101	#endif
1102	{
1103	ev_rt_now = ev_time ();
1104
1105	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1106	{
1107	periodics_reschedule (EV_A);
1108
1109	/* adjust timers. this is easy, as the offset is the same for all */
1110	for (i = 0; i < timercnt; ++i)
1111	((WT)timers [i])->at += ev_rt_now - mn_now;
1112	}
1113		2331
1114	mn_now = ev_rt_now;	2332	mn_now = ev_rt_now;
1115	}	2333	}
1116	}	2334	}
1117		2335
1118	void	2336	void
1119	ev_ref (EV_P)
1120	{
1121	++activecnt;
1122	}
1123
1124	void
1125	ev_unref (EV_P)
1126	{
1127	--activecnt;
1128	}
1129
1130	static int loop_done;
1131
1132	void
1133	ev_loop (EV_P_ int flags)	2337	ev_run (EV_P_ int flags)
1134	{	2338	{
1135	double block;	2339	#if EV_FEATURE_API
1136	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	2340	++loop_depth;
		2341	#endif
		2342
		2343	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
		2344
		2345	loop_done = EVBREAK_CANCEL;
		2346
		2347	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1137		2348
1138	do	2349	do
1139	{	2350	{
		2351	#if EV_VERIFY >= 2
		2352	ev_verify (EV_A);
		2353	#endif
		2354
		2355	#ifndef _WIN32
		2356	if (expect_false (curpid)) /* penalise the forking check even more */
		2357	if (expect_false (getpid () != curpid))
		2358	{
		2359	curpid = getpid ();
		2360	postfork = 1;
		2361	}
		2362	#endif
		2363
		2364	#if EV_FORK_ENABLE
		2365	/* we might have forked, so queue fork handlers */
		2366	if (expect_false (postfork))
		2367	if (forkcnt)
		2368	{
		2369	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		2370	EV_INVOKE_PENDING;
		2371	}
		2372	#endif
		2373
		2374	#if EV_PREPARE_ENABLE
1140	/* queue check watchers (and execute them) */	2375	/* queue prepare watchers (and execute them) */
1141	if (expect_false (preparecnt))	2376	if (expect_false (preparecnt))
1142	{	2377	{
1143	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2378	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1144	call_pending (EV_A);	2379	EV_INVOKE_PENDING;
1145	}	2380	}
		2381	#endif
		2382
		2383	if (expect_false (loop_done))
		2384	break;
1146		2385
1147	/* we might have forked, so reify kernel state if necessary */	2386	/* we might have forked, so reify kernel state if necessary */
1148	if (expect_false (postfork))	2387	if (expect_false (postfork))
1149	loop_fork (EV_A);	2388	loop_fork (EV_A);
1150		2389
1151	/* update fd-related kernel structures */	2390	/* update fd-related kernel structures */
1152	fd_reify (EV_A);	2391	fd_reify (EV_A);
1153		2392
1154	/* calculate blocking time */	2393	/* calculate blocking time */
		2394	{
		2395	ev_tstamp waittime = 0.;
		2396	ev_tstamp sleeptime = 0.;
1155		2397
1156	/* we only need this for !monotonic clock or timers, but as we basically	2398	/* remember old timestamp for io_blocktime calculation */
1157	always have timers, we just calculate it always */	2399	ev_tstamp prev_mn_now = mn_now;
1158	#if EV_USE_MONOTONIC	2400
1159	if (expect_true (have_monotonic))	2401	/* update time to cancel out callback processing overhead */
1160	time_update_monotonic (EV_A);	2402	time_update (EV_A_ 1e100);
1161	else	2403
1162	#endif	2404	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1163	{	2405	{
1164	ev_rt_now = ev_time ();
1165	mn_now = ev_rt_now;
1166	}
1167
1168	if (flags & EVLOOP_NONBLOCK || idlecnt)
1169	block = 0.;
1170	else
1171	{
1172	block = MAX_BLOCKTIME;	2406	waittime = MAX_BLOCKTIME;
1173		2407
1174	if (timercnt)	2408	if (timercnt)
1175	{	2409	{
1176	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	2410	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1177	if (block > to) block = to;	2411	if (waittime > to) waittime = to;
1178	}	2412	}
1179		2413
		2414	#if EV_PERIODIC_ENABLE
1180	if (periodiccnt)	2415	if (periodiccnt)
1181	{	2416	{
1182	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	2417	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1183	if (block > to) block = to;	2418	if (waittime > to) waittime = to;
1184	}	2419	}
		2420	#endif
1185		2421
1186	if (block < 0.) block = 0.;	2422	/* don't let timeouts decrease the waittime below timeout_blocktime */
		2423	if (expect_false (waittime < timeout_blocktime))
		2424	waittime = timeout_blocktime;
		2425
		2426	/* extra check because io_blocktime is commonly 0 */
		2427	if (expect_false (io_blocktime))
		2428	{
		2429	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2430
		2431	if (sleeptime > waittime - backend_fudge)
		2432	sleeptime = waittime - backend_fudge;
		2433
		2434	if (expect_true (sleeptime > 0.))
		2435	{
		2436	ev_sleep (sleeptime);
		2437	waittime -= sleeptime;
		2438	}
		2439	}
1187	}	2440	}
1188		2441
1189	method_poll (EV_A_ block);	2442	#if EV_FEATURE_API
		2443	++loop_count;
		2444	#endif
		2445	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
		2446	backend_poll (EV_A_ waittime);
		2447	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1190		2448
1191	/* update ev_rt_now, do magic */	2449	/* update ev_rt_now, do magic */
1192	time_update (EV_A);	2450	time_update (EV_A_ waittime + sleeptime);
		2451	}
1193		2452
1194	/* queue pending timers and reschedule them */	2453	/* queue pending timers and reschedule them */
1195	timers_reify (EV_A); /* relative timers called last */	2454	timers_reify (EV_A); /* relative timers called last */
		2455	#if EV_PERIODIC_ENABLE
1196	periodics_reify (EV_A); /* absolute timers called first */	2456	periodics_reify (EV_A); /* absolute timers called first */
		2457	#endif
1197		2458
		2459	#if EV_IDLE_ENABLE
1198	/* queue idle watchers unless io or timers are pending */	2460	/* queue idle watchers unless other events are pending */
1199	if (idlecnt && !any_pending (EV_A))	2461	idle_reify (EV_A);
1200	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2462	#endif
1201		2463
		2464	#if EV_CHECK_ENABLE
1202	/* queue check watchers, to be executed first */	2465	/* queue check watchers, to be executed first */
1203	if (checkcnt)	2466	if (expect_false (checkcnt))
1204	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2467	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2468	#endif
1205		2469
1206	call_pending (EV_A);	2470	EV_INVOKE_PENDING;
1207	}	2471	}
1208	while (activecnt && !loop_done);	2472	while (expect_true (
		2473	activecnt
		2474	&& !loop_done
		2475	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
		2476	));
1209		2477
1210	if (loop_done != 2)	2478	if (loop_done == EVBREAK_ONE)
1211	loop_done = 0;	2479	loop_done = EVBREAK_CANCEL;
1212	}
1213		2480
		2481	#if EV_FEATURE_API
		2482	--loop_depth;
		2483	#endif
		2484	}
		2485
1214	void	2486	void
1215	ev_unloop (EV_P_ int how)	2487	ev_break (EV_P_ int how)
1216	{	2488	{
1217	loop_done = how;	2489	loop_done = how;
1218	}	2490	}
1219		2491
		2492	void
		2493	ev_ref (EV_P)
		2494	{
		2495	++activecnt;
		2496	}
		2497
		2498	void
		2499	ev_unref (EV_P)
		2500	{
		2501	--activecnt;
		2502	}
		2503
		2504	void
		2505	ev_now_update (EV_P)
		2506	{
		2507	time_update (EV_A_ 1e100);
		2508	}
		2509
		2510	void
		2511	ev_suspend (EV_P)
		2512	{
		2513	ev_now_update (EV_A);
		2514	}
		2515
		2516	void
		2517	ev_resume (EV_P)
		2518	{
		2519	ev_tstamp mn_prev = mn_now;
		2520
		2521	ev_now_update (EV_A);
		2522	timers_reschedule (EV_A_ mn_now - mn_prev);
		2523	#if EV_PERIODIC_ENABLE
		2524	/* TODO: really do this? */
		2525	periodics_reschedule (EV_A);
		2526	#endif
		2527	}
		2528
1220	/*****************************************************************************/	2529	/*****************************************************************************/
		2530	/* singly-linked list management, used when the expected list length is short */
1221		2531
1222	inline void	2532	inline_size void
1223	wlist_add (WL *head, WL elem)	2533	wlist_add (WL *head, WL elem)
1224	{	2534	{
1225	elem->next = *head;	2535	elem->next = *head;
1226	*head = elem;	2536	*head = elem;
1227	}	2537	}
1228		2538
1229	inline void	2539	inline_size void
1230	wlist_del (WL *head, WL elem)	2540	wlist_del (WL *head, WL elem)
1231	{	2541	{
1232	while (*head)	2542	while (*head)
1233	{	2543	{
1234	if (*head == elem)	2544	if (expect_true (*head == elem))
1235	{	2545	{
1236	*head = elem->next;	2546	*head = elem->next;
1237	return;	2547	break;
1238	}	2548	}
1239		2549
1240	head = &(*head)->next;	2550	head = &(*head)->next;
1241	}	2551	}
1242	}	2552	}
1243		2553
		2554	/* internal, faster, version of ev_clear_pending */
1244	inline void	2555	inline_speed void
1245	ev_clear_pending (EV_P_ W w)	2556	clear_pending (EV_P_ W w)
1246	{	2557	{
1247	if (w->pending)	2558	if (w->pending)
1248	{	2559	{
1249	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2560	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1250	w->pending = 0;	2561	w->pending = 0;
1251	}	2562	}
1252	}	2563	}
1253		2564
		2565	int
		2566	ev_clear_pending (EV_P_ void *w)
		2567	{
		2568	W w_ = (W)w;
		2569	int pending = w_->pending;
		2570
		2571	if (expect_true (pending))
		2572	{
		2573	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2574	p->w = (W)&pending_w;
		2575	w_->pending = 0;
		2576	return p->events;
		2577	}
		2578	else
		2579	return 0;
		2580	}
		2581
1254	inline void	2582	inline_size void
		2583	pri_adjust (EV_P_ W w)
		2584	{
		2585	int pri = ev_priority (w);
		2586	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2587	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2588	ev_set_priority (w, pri);
		2589	}
		2590
		2591	inline_speed void
1255	ev_start (EV_P_ W w, int active)	2592	ev_start (EV_P_ W w, int active)
1256	{	2593	{
1257	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2594	pri_adjust (EV_A_ w);
1258	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1259
1260	w->active = active;	2595	w->active = active;
1261	ev_ref (EV_A);	2596	ev_ref (EV_A);
1262	}	2597	}
1263		2598
1264	inline void	2599	inline_size void
1265	ev_stop (EV_P_ W w)	2600	ev_stop (EV_P_ W w)
1266	{	2601	{
1267	ev_unref (EV_A);	2602	ev_unref (EV_A);
1268	w->active = 0;	2603	w->active = 0;
1269	}	2604	}
1270		2605
1271	/*****************************************************************************/	2606	/*****************************************************************************/
1272		2607
1273	void	2608	void noinline
1274	ev_io_start (EV_P_ struct ev_io *w)	2609	ev_io_start (EV_P_ ev_io *w)
1275	{	2610	{
1276	int fd = w->fd;	2611	int fd = w->fd;
1277		2612
		2613	if (expect_false (ev_is_active (w)))
		2614	return;
		2615
		2616	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2617	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		2618
		2619	EV_FREQUENT_CHECK;
		2620
		2621	ev_start (EV_A_ (W)w, 1);
		2622	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
		2623	wlist_add (&anfds[fd].head, (WL)w);
		2624
		2625	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
		2626	w->events &= ~EV__IOFDSET;
		2627
		2628	EV_FREQUENT_CHECK;
		2629	}
		2630
		2631	void noinline
		2632	ev_io_stop (EV_P_ ev_io *w)
		2633	{
		2634	clear_pending (EV_A_ (W)w);
		2635	if (expect_false (!ev_is_active (w)))
		2636	return;
		2637
		2638	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2639
		2640	EV_FREQUENT_CHECK;
		2641
		2642	wlist_del (&anfds[w->fd].head, (WL)w);
		2643	ev_stop (EV_A_ (W)w);
		2644
		2645	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
		2646
		2647	EV_FREQUENT_CHECK;
		2648	}
		2649
		2650	void noinline
		2651	ev_timer_start (EV_P_ ev_timer *w)
		2652	{
		2653	if (expect_false (ev_is_active (w)))
		2654	return;
		2655
		2656	ev_at (w) += mn_now;
		2657
		2658	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		2659
		2660	EV_FREQUENT_CHECK;
		2661
		2662	++timercnt;
		2663	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
		2664	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
		2665	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2666	ANHE_at_cache (timers [ev_active (w)]);
		2667	upheap (timers, ev_active (w));
		2668
		2669	EV_FREQUENT_CHECK;
		2670
		2671	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
		2672	}
		2673
		2674	void noinline
		2675	ev_timer_stop (EV_P_ ev_timer *w)
		2676	{
		2677	clear_pending (EV_A_ (W)w);
		2678	if (expect_false (!ev_is_active (w)))
		2679	return;
		2680
		2681	EV_FREQUENT_CHECK;
		2682
		2683	{
		2684	int active = ev_active (w);
		2685
		2686	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2687
		2688	--timercnt;
		2689
		2690	if (expect_true (active < timercnt + HEAP0))
		2691	{
		2692	timers [active] = timers [timercnt + HEAP0];
		2693	adjustheap (timers, timercnt, active);
		2694	}
		2695	}
		2696
		2697	ev_at (w) -= mn_now;
		2698
		2699	ev_stop (EV_A_ (W)w);
		2700
		2701	EV_FREQUENT_CHECK;
		2702	}
		2703
		2704	void noinline
		2705	ev_timer_again (EV_P_ ev_timer *w)
		2706	{
		2707	EV_FREQUENT_CHECK;
		2708
1278	if (ev_is_active (w))	2709	if (ev_is_active (w))
1279	return;
1280
1281	assert (("ev_io_start called with negative fd", fd >= 0));
1282
1283	ev_start (EV_A_ (W)w, 1);
1284	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1285	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1286
1287	fd_change (EV_A_ fd);
1288	}
1289
1290	void
1291	ev_io_stop (EV_P_ struct ev_io *w)
1292	{
1293	ev_clear_pending (EV_A_ (W)w);
1294	if (!ev_is_active (w))
1295	return;
1296
1297	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1298
1299	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1300	ev_stop (EV_A_ (W)w);
1301
1302	fd_change (EV_A_ w->fd);
1303	}
1304
1305	void
1306	ev_timer_start (EV_P_ struct ev_timer *w)
1307	{
1308	if (ev_is_active (w))
1309	return;
1310
1311	((WT)w)->at += mn_now;
1312
1313	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1314
1315	ev_start (EV_A_ (W)w, ++timercnt);
1316	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1317	timers [timercnt - 1] = w;
1318	upheap ((WT *)timers, timercnt - 1);
1319
1320	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1321	}
1322
1323	void
1324	ev_timer_stop (EV_P_ struct ev_timer *w)
1325	{
1326	ev_clear_pending (EV_A_ (W)w);
1327	if (!ev_is_active (w))
1328	return;
1329
1330	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1331
1332	if (((W)w)->active < timercnt--)
1333	{
1334	timers [((W)w)->active - 1] = timers [timercnt];
1335	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1336	}
1337
1338	((WT)w)->at = w->repeat;
1339
1340	ev_stop (EV_A_ (W)w);
1341	}
1342
1343	void
1344	ev_timer_again (EV_P_ struct ev_timer *w)
1345	{
1346	if (ev_is_active (w))
1347	{	2710	{
1348	if (w->repeat)	2711	if (w->repeat)
1349	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);	2712	{
		2713	ev_at (w) = mn_now + w->repeat;
		2714	ANHE_at_cache (timers [ev_active (w)]);
		2715	adjustheap (timers, timercnt, ev_active (w));
		2716	}
1350	else	2717	else
1351	ev_timer_stop (EV_A_ w);	2718	ev_timer_stop (EV_A_ w);
1352	}	2719	}
1353	else if (w->repeat)	2720	else if (w->repeat)
		2721	{
		2722	ev_at (w) = w->repeat;
1354	ev_timer_start (EV_A_ w);	2723	ev_timer_start (EV_A_ w);
1355	}	2724	}
1356		2725
1357	void	2726	EV_FREQUENT_CHECK;
		2727	}
		2728
		2729	ev_tstamp
		2730	ev_timer_remaining (EV_P_ ev_timer *w)
		2731	{
		2732	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2733	}
		2734
		2735	#if EV_PERIODIC_ENABLE
		2736	void noinline
1358	ev_periodic_start (EV_P_ struct ev_periodic *w)	2737	ev_periodic_start (EV_P_ ev_periodic *w)
1359	{	2738	{
1360	if (ev_is_active (w))	2739	if (expect_false (ev_is_active (w)))
1361	return;	2740	return;
1362		2741
1363	if (w->reschedule_cb)	2742	if (w->reschedule_cb)
1364	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2743	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1365	else if (w->interval)	2744	else if (w->interval)
1366	{	2745	{
1367	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2746	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1368	/* this formula differs from the one in periodic_reify because we do not always round up */	2747	/* this formula differs from the one in periodic_reify because we do not always round up */
1369	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2748	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1370	}	2749	}
		2750	else
		2751	ev_at (w) = w->offset;
1371		2752
		2753	EV_FREQUENT_CHECK;
		2754
		2755	++periodiccnt;
1372	ev_start (EV_A_ (W)w, ++periodiccnt);	2756	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1373	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));	2757	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1374	periodics [periodiccnt - 1] = w;	2758	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1375	upheap ((WT *)periodics, periodiccnt - 1);	2759	ANHE_at_cache (periodics [ev_active (w)]);
		2760	upheap (periodics, ev_active (w));
1376		2761
		2762	EV_FREQUENT_CHECK;
		2763
1377	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2764	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1378	}	2765	}
1379		2766
1380	void	2767	void noinline
1381	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2768	ev_periodic_stop (EV_P_ ev_periodic *w)
1382	{	2769	{
1383	ev_clear_pending (EV_A_ (W)w);	2770	clear_pending (EV_A_ (W)w);
1384	if (!ev_is_active (w))	2771	if (expect_false (!ev_is_active (w)))
1385	return;	2772	return;
1386		2773
		2774	EV_FREQUENT_CHECK;
		2775
		2776	{
		2777	int active = ev_active (w);
		2778
1387	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2779	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1388		2780
1389	if (((W)w)->active < periodiccnt--)	2781	--periodiccnt;
		2782
		2783	if (expect_true (active < periodiccnt + HEAP0))
1390	{	2784	{
1391	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2785	periodics [active] = periodics [periodiccnt + HEAP0];
1392	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2786	adjustheap (periodics, periodiccnt, active);
1393	}	2787	}
		2788	}
1394		2789
1395	ev_stop (EV_A_ (W)w);	2790	ev_stop (EV_A_ (W)w);
1396	}
1397		2791
1398	void	2792	EV_FREQUENT_CHECK;
		2793	}
		2794
		2795	void noinline
1399	ev_periodic_again (EV_P_ struct ev_periodic *w)	2796	ev_periodic_again (EV_P_ ev_periodic *w)
1400	{	2797	{
1401	/* TODO: use adjustheap and recalculation */	2798	/* TODO: use adjustheap and recalculation */
1402	ev_periodic_stop (EV_A_ w);	2799	ev_periodic_stop (EV_A_ w);
1403	ev_periodic_start (EV_A_ w);	2800	ev_periodic_start (EV_A_ w);
1404	}	2801	}
1405		2802	#endif
1406	void
1407	ev_idle_start (EV_P_ struct ev_idle *w)
1408	{
1409	if (ev_is_active (w))
1410	return;
1411
1412	ev_start (EV_A_ (W)w, ++idlecnt);
1413	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1414	idles [idlecnt - 1] = w;
1415	}
1416
1417	void
1418	ev_idle_stop (EV_P_ struct ev_idle *w)
1419	{
1420	ev_clear_pending (EV_A_ (W)w);
1421	if (ev_is_active (w))
1422	return;
1423
1424	idles [((W)w)->active - 1] = idles [--idlecnt];
1425	ev_stop (EV_A_ (W)w);
1426	}
1427
1428	void
1429	ev_prepare_start (EV_P_ struct ev_prepare *w)
1430	{
1431	if (ev_is_active (w))
1432	return;
1433
1434	ev_start (EV_A_ (W)w, ++preparecnt);
1435	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1436	prepares [preparecnt - 1] = w;
1437	}
1438
1439	void
1440	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1441	{
1442	ev_clear_pending (EV_A_ (W)w);
1443	if (ev_is_active (w))
1444	return;
1445
1446	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1447	ev_stop (EV_A_ (W)w);
1448	}
1449
1450	void
1451	ev_check_start (EV_P_ struct ev_check *w)
1452	{
1453	if (ev_is_active (w))
1454	return;
1455
1456	ev_start (EV_A_ (W)w, ++checkcnt);
1457	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1458	checks [checkcnt - 1] = w;
1459	}
1460
1461	void
1462	ev_check_stop (EV_P_ struct ev_check *w)
1463	{
1464	ev_clear_pending (EV_A_ (W)w);
1465	if (ev_is_active (w))
1466	return;
1467
1468	checks [((W)w)->active - 1] = checks [--checkcnt];
1469	ev_stop (EV_A_ (W)w);
1470	}
1471		2803
1472	#ifndef SA_RESTART	2804	#ifndef SA_RESTART
1473	# define SA_RESTART 0	2805	# define SA_RESTART 0
1474	#endif	2806	#endif
1475		2807
1476	void	2808	#if EV_SIGNAL_ENABLE
		2809
		2810	void noinline
1477	ev_signal_start (EV_P_ struct ev_signal *w)	2811	ev_signal_start (EV_P_ ev_signal *w)
1478	{	2812	{
		2813	if (expect_false (ev_is_active (w)))
		2814	return;
		2815
		2816	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
		2817
1479	#if EV_MULTIPLICITY	2818	#if EV_MULTIPLICITY
1480	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2819	assert (("libev: a signal must not be attached to two different loops",
		2820	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
		2821
		2822	signals [w->signum - 1].loop = EV_A;
		2823	#endif
		2824
		2825	EV_FREQUENT_CHECK;
		2826
		2827	#if EV_USE_SIGNALFD
		2828	if (sigfd == -2)
		2829	{
		2830	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
		2831	if (sigfd < 0 && errno == EINVAL)
		2832	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
		2833
		2834	if (sigfd >= 0)
		2835	{
		2836	fd_intern (sigfd); /* doing it twice will not hurt */
		2837
		2838	sigemptyset (&sigfd_set);
		2839
		2840	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2841	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2842	ev_io_start (EV_A_ &sigfd_w);
		2843	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2844	}
		2845	}
		2846
		2847	if (sigfd >= 0)
		2848	{
		2849	/* TODO: check .head */
		2850	sigaddset (&sigfd_set, w->signum);
		2851	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2852
		2853	signalfd (sigfd, &sigfd_set, 0);
		2854	}
		2855	#endif
		2856
		2857	ev_start (EV_A_ (W)w, 1);
		2858	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2859
		2860	if (!((WL)w)->next)
		2861	# if EV_USE_SIGNALFD
		2862	if (sigfd < 0) /*TODO*/
1481	#endif	2863	# endif
1482	if (ev_is_active (w))	2864	{
		2865	# ifdef _WIN32
		2866	evpipe_init (EV_A);
		2867
		2868	signal (w->signum, ev_sighandler);
		2869	# else
		2870	struct sigaction sa;
		2871
		2872	evpipe_init (EV_A);
		2873
		2874	sa.sa_handler = ev_sighandler;
		2875	sigfillset (&sa.sa_mask);
		2876	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2877	sigaction (w->signum, &sa, 0);
		2878
		2879	sigemptyset (&sa.sa_mask);
		2880	sigaddset (&sa.sa_mask, w->signum);
		2881	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		2882	#endif
		2883	}
		2884
		2885	EV_FREQUENT_CHECK;
		2886	}
		2887
		2888	void noinline
		2889	ev_signal_stop (EV_P_ ev_signal *w)
		2890	{
		2891	clear_pending (EV_A_ (W)w);
		2892	if (expect_false (!ev_is_active (w)))
1483	return;	2893	return;
1484		2894
1485	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2895	EV_FREQUENT_CHECK;
		2896
		2897	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2898	ev_stop (EV_A_ (W)w);
		2899
		2900	if (!signals [w->signum - 1].head)
		2901	{
		2902	#if EV_MULTIPLICITY
		2903	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2904	#endif
		2905	#if EV_USE_SIGNALFD
		2906	if (sigfd >= 0)
		2907	{
		2908	sigset_t ss;
		2909
		2910	sigemptyset (&ss);
		2911	sigaddset (&ss, w->signum);
		2912	sigdelset (&sigfd_set, w->signum);
		2913
		2914	signalfd (sigfd, &sigfd_set, 0);
		2915	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2916	}
		2917	else
		2918	#endif
		2919	signal (w->signum, SIG_DFL);
		2920	}
		2921
		2922	EV_FREQUENT_CHECK;
		2923	}
		2924
		2925	#endif
		2926
		2927	#if EV_CHILD_ENABLE
		2928
		2929	void
		2930	ev_child_start (EV_P_ ev_child *w)
		2931	{
		2932	#if EV_MULTIPLICITY
		2933	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2934	#endif
		2935	if (expect_false (ev_is_active (w)))
		2936	return;
		2937
		2938	EV_FREQUENT_CHECK;
1486		2939
1487	ev_start (EV_A_ (W)w, 1);	2940	ev_start (EV_A_ (W)w, 1);
1488	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2941	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1489	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1490		2942
1491	if (!((WL)w)->next)	2943	EV_FREQUENT_CHECK;
		2944	}
		2945
		2946	void
		2947	ev_child_stop (EV_P_ ev_child *w)
		2948	{
		2949	clear_pending (EV_A_ (W)w);
		2950	if (expect_false (!ev_is_active (w)))
		2951	return;
		2952
		2953	EV_FREQUENT_CHECK;
		2954
		2955	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
		2956	ev_stop (EV_A_ (W)w);
		2957
		2958	EV_FREQUENT_CHECK;
		2959	}
		2960
		2961	#endif
		2962
		2963	#if EV_STAT_ENABLE
		2964
		2965	# ifdef _WIN32
		2966	# undef lstat
		2967	# define lstat(a,b) _stati64 (a,b)
		2968	# endif
		2969
		2970	#define DEF_STAT_INTERVAL 5.0074891
		2971	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
		2972	#define MIN_STAT_INTERVAL 0.1074891
		2973
		2974	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2975
		2976	#if EV_USE_INOTIFY
		2977
		2978	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2979	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
		2980
		2981	static void noinline
		2982	infy_add (EV_P_ ev_stat *w)
		2983	{
		2984	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2985
		2986	if (w->wd >= 0)
		2987	{
		2988	struct statfs sfs;
		2989
		2990	/* now local changes will be tracked by inotify, but remote changes won't */
		2991	/* unless the filesystem is known to be local, we therefore still poll */
		2992	/* also do poll on <2.6.25, but with normal frequency */
		2993
		2994	if (!fs_2625)
		2995	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2996	else if (!statfs (w->path, &sfs)
		2997	&& (sfs.f_type == 0x1373 /* devfs */
		2998	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2999	|| sfs.f_type == 0x3153464a /* jfs */
		3000	|| sfs.f_type == 0x52654973 /* reiser3 */
		3001	|| sfs.f_type == 0x01021994 /* tempfs */
		3002	|| sfs.f_type == 0x58465342 /* xfs */))
		3003	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		3004	else
		3005	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1492	{	3006	}
1493	#if WIN32	3007	else
1494	signal (w->signum, sighandler);	3008	{
		3009	/* can't use inotify, continue to stat */
		3010	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3011
		3012	/* if path is not there, monitor some parent directory for speedup hints */
		3013	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		3014	/* but an efficiency issue only */
		3015	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		3016	{
		3017	char path [4096];
		3018	strcpy (path, w->path);
		3019
		3020	do
		3021	{
		3022	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		3023	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		3024
		3025	char *pend = strrchr (path, '/');
		3026
		3027	if (!pend || pend == path)
		3028	break;
		3029
		3030	*pend = 0;
		3031	w->wd = inotify_add_watch (fs_fd, path, mask);
		3032	}
		3033	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		3034	}
		3035	}
		3036
		3037	if (w->wd >= 0)
		3038	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3039
		3040	/* now re-arm timer, if required */
		3041	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3042	ev_timer_again (EV_A_ &w->timer);
		3043	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3044	}
		3045
		3046	static void noinline
		3047	infy_del (EV_P_ ev_stat *w)
		3048	{
		3049	int slot;
		3050	int wd = w->wd;
		3051
		3052	if (wd < 0)
		3053	return;
		3054
		3055	w->wd = -2;
		3056	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
		3057	wlist_del (&fs_hash [slot].head, (WL)w);
		3058
		3059	/* remove this watcher, if others are watching it, they will rearm */
		3060	inotify_rm_watch (fs_fd, wd);
		3061	}
		3062
		3063	static void noinline
		3064	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		3065	{
		3066	if (slot < 0)
		3067	/* overflow, need to check for all hash slots */
		3068	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
		3069	infy_wd (EV_A_ slot, wd, ev);
		3070	else
		3071	{
		3072	WL w_;
		3073
		3074	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
		3075	{
		3076	ev_stat *w = (ev_stat *)w_;
		3077	w_ = w_->next; /* lets us remove this watcher and all before it */
		3078
		3079	if (w->wd == wd || wd == -1)
		3080	{
		3081	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		3082	{
		3083	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3084	w->wd = -1;
		3085	infy_add (EV_A_ w); /* re-add, no matter what */
		3086	}
		3087
		3088	stat_timer_cb (EV_A_ &w->timer, 0);
		3089	}
		3090	}
		3091	}
		3092	}
		3093
		3094	static void
		3095	infy_cb (EV_P_ ev_io *w, int revents)
		3096	{
		3097	char buf [EV_INOTIFY_BUFSIZE];
		3098	int ofs;
		3099	int len = read (fs_fd, buf, sizeof (buf));
		3100
		3101	for (ofs = 0; ofs < len; )
		3102	{
		3103	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
		3104	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3105	ofs += sizeof (struct inotify_event) + ev->len;
		3106	}
		3107	}
		3108
		3109	inline_size void
		3110	ev_check_2625 (EV_P)
		3111	{
		3112	/* kernels < 2.6.25 are borked
		3113	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		3114	*/
		3115	if (ev_linux_version () < 0x020619)
		3116	return;
		3117
		3118	fs_2625 = 1;
		3119	}
		3120
		3121	inline_size int
		3122	infy_newfd (void)
		3123	{
		3124	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3125	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3126	if (fd >= 0)
		3127	return fd;
		3128	#endif
		3129	return inotify_init ();
		3130	}
		3131
		3132	inline_size void
		3133	infy_init (EV_P)
		3134	{
		3135	if (fs_fd != -2)
		3136	return;
		3137
		3138	fs_fd = -1;
		3139
		3140	ev_check_2625 (EV_A);
		3141
		3142	fs_fd = infy_newfd ();
		3143
		3144	if (fs_fd >= 0)
		3145	{
		3146	fd_intern (fs_fd);
		3147	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		3148	ev_set_priority (&fs_w, EV_MAXPRI);
		3149	ev_io_start (EV_A_ &fs_w);
		3150	ev_unref (EV_A);
		3151	}
		3152	}
		3153
		3154	inline_size void
		3155	infy_fork (EV_P)
		3156	{
		3157	int slot;
		3158
		3159	if (fs_fd < 0)
		3160	return;
		3161
		3162	ev_ref (EV_A);
		3163	ev_io_stop (EV_A_ &fs_w);
		3164	close (fs_fd);
		3165	fs_fd = infy_newfd ();
		3166
		3167	if (fs_fd >= 0)
		3168	{
		3169	fd_intern (fs_fd);
		3170	ev_io_set (&fs_w, fs_fd, EV_READ);
		3171	ev_io_start (EV_A_ &fs_w);
		3172	ev_unref (EV_A);
		3173	}
		3174
		3175	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
		3176	{
		3177	WL w_ = fs_hash [slot].head;
		3178	fs_hash [slot].head = 0;
		3179
		3180	while (w_)
		3181	{
		3182	ev_stat *w = (ev_stat *)w_;
		3183	w_ = w_->next; /* lets us add this watcher */
		3184
		3185	w->wd = -1;
		3186
		3187	if (fs_fd >= 0)
		3188	infy_add (EV_A_ w); /* re-add, no matter what */
		3189	else
		3190	{
		3191	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3192	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3193	ev_timer_again (EV_A_ &w->timer);
		3194	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3195	}
		3196	}
		3197	}
		3198	}
		3199
		3200	#endif
		3201
		3202	#ifdef _WIN32
		3203	# define EV_LSTAT(p,b) _stati64 (p, b)
1495	#else	3204	#else
1496	struct sigaction sa;	3205	# define EV_LSTAT(p,b) lstat (p, b)
1497	sa.sa_handler = sighandler;
1498	sigfillset (&sa.sa_mask);
1499	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1500	sigaction (w->signum, &sa, 0);
1501	#endif	3206	#endif
1502	}
1503	}
1504		3207
1505	void	3208	void
1506	ev_signal_stop (EV_P_ struct ev_signal *w)	3209	ev_stat_stat (EV_P_ ev_stat *w)
1507	{	3210	{
1508	ev_clear_pending (EV_A_ (W)w);	3211	if (lstat (w->path, &w->attr) < 0)
1509	if (!ev_is_active (w))	3212	w->attr.st_nlink = 0;
		3213	else if (!w->attr.st_nlink)
		3214	w->attr.st_nlink = 1;
		3215	}
		3216
		3217	static void noinline
		3218	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		3219	{
		3220	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		3221
		3222	ev_statdata prev = w->attr;
		3223	ev_stat_stat (EV_A_ w);
		3224
		3225	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		3226	if (
		3227	prev.st_dev != w->attr.st_dev
		3228	|| prev.st_ino != w->attr.st_ino
		3229	|| prev.st_mode != w->attr.st_mode
		3230	|| prev.st_nlink != w->attr.st_nlink
		3231	|| prev.st_uid != w->attr.st_uid
		3232	|| prev.st_gid != w->attr.st_gid
		3233	|| prev.st_rdev != w->attr.st_rdev
		3234	|| prev.st_size != w->attr.st_size
		3235	|| prev.st_atime != w->attr.st_atime
		3236	|| prev.st_mtime != w->attr.st_mtime
		3237	|| prev.st_ctime != w->attr.st_ctime
		3238	) {
		3239	/* we only update w->prev on actual differences */
		3240	/* in case we test more often than invoke the callback, */
		3241	/* to ensure that prev is always different to attr */
		3242	w->prev = prev;
		3243
		3244	#if EV_USE_INOTIFY
		3245	if (fs_fd >= 0)
		3246	{
		3247	infy_del (EV_A_ w);
		3248	infy_add (EV_A_ w);
		3249	ev_stat_stat (EV_A_ w); /* avoid race... */
		3250	}
		3251	#endif
		3252
		3253	ev_feed_event (EV_A_ w, EV_STAT);
		3254	}
		3255	}
		3256
		3257	void
		3258	ev_stat_start (EV_P_ ev_stat *w)
		3259	{
		3260	if (expect_false (ev_is_active (w)))
1510	return;	3261	return;
1511		3262
1512	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	3263	ev_stat_stat (EV_A_ w);
		3264
		3265	if (w->interval < MIN_STAT_INTERVAL && w->interval)
		3266	w->interval = MIN_STAT_INTERVAL;
		3267
		3268	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
		3269	ev_set_priority (&w->timer, ev_priority (w));
		3270
		3271	#if EV_USE_INOTIFY
		3272	infy_init (EV_A);
		3273
		3274	if (fs_fd >= 0)
		3275	infy_add (EV_A_ w);
		3276	else
		3277	#endif
		3278	{
		3279	ev_timer_again (EV_A_ &w->timer);
		3280	ev_unref (EV_A);
		3281	}
		3282
		3283	ev_start (EV_A_ (W)w, 1);
		3284
		3285	EV_FREQUENT_CHECK;
		3286	}
		3287
		3288	void
		3289	ev_stat_stop (EV_P_ ev_stat *w)
		3290	{
		3291	clear_pending (EV_A_ (W)w);
		3292	if (expect_false (!ev_is_active (w)))
		3293	return;
		3294
		3295	EV_FREQUENT_CHECK;
		3296
		3297	#if EV_USE_INOTIFY
		3298	infy_del (EV_A_ w);
		3299	#endif
		3300
		3301	if (ev_is_active (&w->timer))
		3302	{
		3303	ev_ref (EV_A);
		3304	ev_timer_stop (EV_A_ &w->timer);
		3305	}
		3306
1513	ev_stop (EV_A_ (W)w);	3307	ev_stop (EV_A_ (W)w);
1514		3308
1515	if (!signals [w->signum - 1].head)	3309	EV_FREQUENT_CHECK;
1516	signal (w->signum, SIG_DFL);
1517	}	3310	}
		3311	#endif
1518		3312
		3313	#if EV_IDLE_ENABLE
1519	void	3314	void
1520	ev_child_start (EV_P_ struct ev_child *w)	3315	ev_idle_start (EV_P_ ev_idle *w)
1521	{	3316	{
1522	#if EV_MULTIPLICITY
1523	assert (("child watchers are only supported in the default loop", loop == default_loop));
1524	#endif
1525	if (ev_is_active (w))	3317	if (expect_false (ev_is_active (w)))
1526	return;	3318	return;
1527		3319
		3320	pri_adjust (EV_A_ (W)w);
		3321
		3322	EV_FREQUENT_CHECK;
		3323
		3324	{
		3325	int active = ++idlecnt [ABSPRI (w)];
		3326
		3327	++idleall;
		3328	ev_start (EV_A_ (W)w, active);
		3329
		3330	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		3331	idles [ABSPRI (w)][active - 1] = w;
		3332	}
		3333
		3334	EV_FREQUENT_CHECK;
		3335	}
		3336
		3337	void
		3338	ev_idle_stop (EV_P_ ev_idle *w)
		3339	{
		3340	clear_pending (EV_A_ (W)w);
		3341	if (expect_false (!ev_is_active (w)))
		3342	return;
		3343
		3344	EV_FREQUENT_CHECK;
		3345
		3346	{
		3347	int active = ev_active (w);
		3348
		3349	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		3350	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		3351
		3352	ev_stop (EV_A_ (W)w);
		3353	--idleall;
		3354	}
		3355
		3356	EV_FREQUENT_CHECK;
		3357	}
		3358	#endif
		3359
		3360	#if EV_PREPARE_ENABLE
		3361	void
		3362	ev_prepare_start (EV_P_ ev_prepare *w)
		3363	{
		3364	if (expect_false (ev_is_active (w)))
		3365	return;
		3366
		3367	EV_FREQUENT_CHECK;
		3368
		3369	ev_start (EV_A_ (W)w, ++preparecnt);
		3370	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		3371	prepares [preparecnt - 1] = w;
		3372
		3373	EV_FREQUENT_CHECK;
		3374	}
		3375
		3376	void
		3377	ev_prepare_stop (EV_P_ ev_prepare *w)
		3378	{
		3379	clear_pending (EV_A_ (W)w);
		3380	if (expect_false (!ev_is_active (w)))
		3381	return;
		3382
		3383	EV_FREQUENT_CHECK;
		3384
		3385	{
		3386	int active = ev_active (w);
		3387
		3388	prepares [active - 1] = prepares [--preparecnt];
		3389	ev_active (prepares [active - 1]) = active;
		3390	}
		3391
		3392	ev_stop (EV_A_ (W)w);
		3393
		3394	EV_FREQUENT_CHECK;
		3395	}
		3396	#endif
		3397
		3398	#if EV_CHECK_ENABLE
		3399	void
		3400	ev_check_start (EV_P_ ev_check *w)
		3401	{
		3402	if (expect_false (ev_is_active (w)))
		3403	return;
		3404
		3405	EV_FREQUENT_CHECK;
		3406
		3407	ev_start (EV_A_ (W)w, ++checkcnt);
		3408	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		3409	checks [checkcnt - 1] = w;
		3410
		3411	EV_FREQUENT_CHECK;
		3412	}
		3413
		3414	void
		3415	ev_check_stop (EV_P_ ev_check *w)
		3416	{
		3417	clear_pending (EV_A_ (W)w);
		3418	if (expect_false (!ev_is_active (w)))
		3419	return;
		3420
		3421	EV_FREQUENT_CHECK;
		3422
		3423	{
		3424	int active = ev_active (w);
		3425
		3426	checks [active - 1] = checks [--checkcnt];
		3427	ev_active (checks [active - 1]) = active;
		3428	}
		3429
		3430	ev_stop (EV_A_ (W)w);
		3431
		3432	EV_FREQUENT_CHECK;
		3433	}
		3434	#endif
		3435
		3436	#if EV_EMBED_ENABLE
		3437	void noinline
		3438	ev_embed_sweep (EV_P_ ev_embed *w)
		3439	{
		3440	ev_run (w->other, EVRUN_NOWAIT);
		3441	}
		3442
		3443	static void
		3444	embed_io_cb (EV_P_ ev_io *io, int revents)
		3445	{
		3446	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		3447
		3448	if (ev_cb (w))
		3449	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		3450	else
		3451	ev_run (w->other, EVRUN_NOWAIT);
		3452	}
		3453
		3454	static void
		3455	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		3456	{
		3457	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		3458
		3459	{
		3460	EV_P = w->other;
		3461
		3462	while (fdchangecnt)
		3463	{
		3464	fd_reify (EV_A);
		3465	ev_run (EV_A_ EVRUN_NOWAIT);
		3466	}
		3467	}
		3468	}
		3469
		3470	static void
		3471	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3472	{
		3473	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3474
		3475	ev_embed_stop (EV_A_ w);
		3476
		3477	{
		3478	EV_P = w->other;
		3479
		3480	ev_loop_fork (EV_A);
		3481	ev_run (EV_A_ EVRUN_NOWAIT);
		3482	}
		3483
		3484	ev_embed_start (EV_A_ w);
		3485	}
		3486
		3487	#if 0
		3488	static void
		3489	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		3490	{
		3491	ev_idle_stop (EV_A_ idle);
		3492	}
		3493	#endif
		3494
		3495	void
		3496	ev_embed_start (EV_P_ ev_embed *w)
		3497	{
		3498	if (expect_false (ev_is_active (w)))
		3499	return;
		3500
		3501	{
		3502	EV_P = w->other;
		3503	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		3504	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		3505	}
		3506
		3507	EV_FREQUENT_CHECK;
		3508
		3509	ev_set_priority (&w->io, ev_priority (w));
		3510	ev_io_start (EV_A_ &w->io);
		3511
		3512	ev_prepare_init (&w->prepare, embed_prepare_cb);
		3513	ev_set_priority (&w->prepare, EV_MINPRI);
		3514	ev_prepare_start (EV_A_ &w->prepare);
		3515
		3516	ev_fork_init (&w->fork, embed_fork_cb);
		3517	ev_fork_start (EV_A_ &w->fork);
		3518
		3519	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		3520
1528	ev_start (EV_A_ (W)w, 1);	3521	ev_start (EV_A_ (W)w, 1);
1529	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1530	}
1531		3522
		3523	EV_FREQUENT_CHECK;
		3524	}
		3525
1532	void	3526	void
1533	ev_child_stop (EV_P_ struct ev_child *w)	3527	ev_embed_stop (EV_P_ ev_embed *w)
1534	{	3528	{
1535	ev_clear_pending (EV_A_ (W)w);	3529	clear_pending (EV_A_ (W)w);
1536	if (ev_is_active (w))	3530	if (expect_false (!ev_is_active (w)))
1537	return;	3531	return;
1538		3532
1539	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	3533	EV_FREQUENT_CHECK;
		3534
		3535	ev_io_stop (EV_A_ &w->io);
		3536	ev_prepare_stop (EV_A_ &w->prepare);
		3537	ev_fork_stop (EV_A_ &w->fork);
		3538
1540	ev_stop (EV_A_ (W)w);	3539	ev_stop (EV_A_ (W)w);
		3540
		3541	EV_FREQUENT_CHECK;
1541	}	3542	}
		3543	#endif
		3544
		3545	#if EV_FORK_ENABLE
		3546	void
		3547	ev_fork_start (EV_P_ ev_fork *w)
		3548	{
		3549	if (expect_false (ev_is_active (w)))
		3550	return;
		3551
		3552	EV_FREQUENT_CHECK;
		3553
		3554	ev_start (EV_A_ (W)w, ++forkcnt);
		3555	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		3556	forks [forkcnt - 1] = w;
		3557
		3558	EV_FREQUENT_CHECK;
		3559	}
		3560
		3561	void
		3562	ev_fork_stop (EV_P_ ev_fork *w)
		3563	{
		3564	clear_pending (EV_A_ (W)w);
		3565	if (expect_false (!ev_is_active (w)))
		3566	return;
		3567
		3568	EV_FREQUENT_CHECK;
		3569
		3570	{
		3571	int active = ev_active (w);
		3572
		3573	forks [active - 1] = forks [--forkcnt];
		3574	ev_active (forks [active - 1]) = active;
		3575	}
		3576
		3577	ev_stop (EV_A_ (W)w);
		3578
		3579	EV_FREQUENT_CHECK;
		3580	}
		3581	#endif
		3582
		3583	#if EV_ASYNC_ENABLE
		3584	void
		3585	ev_async_start (EV_P_ ev_async *w)
		3586	{
		3587	if (expect_false (ev_is_active (w)))
		3588	return;
		3589
		3590	w->sent = 0;
		3591
		3592	evpipe_init (EV_A);
		3593
		3594	EV_FREQUENT_CHECK;
		3595
		3596	ev_start (EV_A_ (W)w, ++asynccnt);
		3597	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		3598	asyncs [asynccnt - 1] = w;
		3599
		3600	EV_FREQUENT_CHECK;
		3601	}
		3602
		3603	void
		3604	ev_async_stop (EV_P_ ev_async *w)
		3605	{
		3606	clear_pending (EV_A_ (W)w);
		3607	if (expect_false (!ev_is_active (w)))
		3608	return;
		3609
		3610	EV_FREQUENT_CHECK;
		3611
		3612	{
		3613	int active = ev_active (w);
		3614
		3615	asyncs [active - 1] = asyncs [--asynccnt];
		3616	ev_active (asyncs [active - 1]) = active;
		3617	}
		3618
		3619	ev_stop (EV_A_ (W)w);
		3620
		3621	EV_FREQUENT_CHECK;
		3622	}
		3623
		3624	void
		3625	ev_async_send (EV_P_ ev_async *w)
		3626	{
		3627	w->sent = 1;
		3628	evpipe_write (EV_A_ &async_pending);
		3629	}
		3630	#endif
1542		3631
1543	/*****************************************************************************/	3632	/*****************************************************************************/
1544		3633
1545	struct ev_once	3634	struct ev_once
1546	{	3635	{
1547	struct ev_io io;	3636	ev_io io;
1548	struct ev_timer to;	3637	ev_timer to;
1549	void (*cb)(int revents, void *arg);	3638	void (*cb)(int revents, void *arg);
1550	void *arg;	3639	void *arg;
1551	};	3640	};
1552		3641
1553	static void	3642	static void
1554	once_cb (EV_P_ struct ev_once *once, int revents)	3643	once_cb (EV_P_ struct ev_once *once, int revents)
1555	{	3644	{
1556	void (*cb)(int revents, void *arg) = once->cb;	3645	void (*cb)(int revents, void *arg) = once->cb;
1557	void *arg = once->arg;	3646	void *arg = once->arg;
1558		3647
1559	ev_io_stop (EV_A_ &once->io);	3648	ev_io_stop (EV_A_ &once->io);
1560	ev_timer_stop (EV_A_ &once->to);	3649	ev_timer_stop (EV_A_ &once->to);
1561	ev_free (once);	3650	ev_free (once);
1562		3651
1563	cb (revents, arg);	3652	cb (revents, arg);
1564	}	3653	}
1565		3654
1566	static void	3655	static void
1567	once_cb_io (EV_P_ struct ev_io *w, int revents)	3656	once_cb_io (EV_P_ ev_io *w, int revents)
1568	{	3657	{
1569	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3658	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3659
		3660	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1570	}	3661	}
1571		3662
1572	static void	3663	static void
1573	once_cb_to (EV_P_ struct ev_timer *w, int revents)	3664	once_cb_to (EV_P_ ev_timer *w, int revents)
1574	{	3665	{
1575	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3666	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3667
		3668	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1576	}	3669	}
1577		3670
1578	void	3671	void
1579	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3672	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1580	{	3673	{
1581	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3674	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1582		3675
1583	if (!once)	3676	if (expect_false (!once))
		3677	{
1584	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3678	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1585	else	3679	return;
1586	{	3680	}
		3681
1587	once->cb = cb;	3682	once->cb = cb;
1588	once->arg = arg;	3683	once->arg = arg;
1589		3684
1590	ev_init (&once->io, once_cb_io);	3685	ev_init (&once->io, once_cb_io);
1591	if (fd >= 0)	3686	if (fd >= 0)
		3687	{
		3688	ev_io_set (&once->io, fd, events);
		3689	ev_io_start (EV_A_ &once->io);
		3690	}
		3691
		3692	ev_init (&once->to, once_cb_to);
		3693	if (timeout >= 0.)
		3694	{
		3695	ev_timer_set (&once->to, timeout, 0.);
		3696	ev_timer_start (EV_A_ &once->to);
		3697	}
		3698	}
		3699
		3700	/*****************************************************************************/
		3701
		3702	#if EV_WALK_ENABLE
		3703	void
		3704	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3705	{
		3706	int i, j;
		3707	ev_watcher_list *wl, *wn;
		3708
		3709	if (types & (EV_IO | EV_EMBED))
		3710	for (i = 0; i < anfdmax; ++i)
		3711	for (wl = anfds [i].head; wl; )
1592	{	3712	{
1593	ev_io_set (&once->io, fd, events);	3713	wn = wl->next;
1594	ev_io_start (EV_A_ &once->io);	3714
		3715	#if EV_EMBED_ENABLE
		3716	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3717	{
		3718	if (types & EV_EMBED)
		3719	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3720	}
		3721	else
		3722	#endif
		3723	#if EV_USE_INOTIFY
		3724	if (ev_cb ((ev_io *)wl) == infy_cb)
		3725	;
		3726	else
		3727	#endif
		3728	if ((ev_io *)wl != &pipe_w)
		3729	if (types & EV_IO)
		3730	cb (EV_A_ EV_IO, wl);
		3731
		3732	wl = wn;
1595	}	3733	}
1596		3734
1597	ev_init (&once->to, once_cb_to);	3735	if (types & (EV_TIMER | EV_STAT))
1598	if (timeout >= 0.)	3736	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3737	#if EV_STAT_ENABLE
		3738	/*TODO: timer is not always active*/
		3739	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1599	{	3740	{
1600	ev_timer_set (&once->to, timeout, 0.);	3741	if (types & EV_STAT)
1601	ev_timer_start (EV_A_ &once->to);	3742	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1602	}	3743	}
1603	}	3744	else
1604	}	3745	#endif
		3746	if (types & EV_TIMER)
		3747	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1605		3748
1606	#ifdef __cplusplus	3749	#if EV_PERIODIC_ENABLE
1607	}	3750	if (types & EV_PERIODIC)
		3751	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3752	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3753	#endif
		3754
		3755	#if EV_IDLE_ENABLE
		3756	if (types & EV_IDLE)
		3757	for (j = NUMPRI; i--; )
		3758	for (i = idlecnt [j]; i--; )
		3759	cb (EV_A_ EV_IDLE, idles [j][i]);
		3760	#endif
		3761
		3762	#if EV_FORK_ENABLE
		3763	if (types & EV_FORK)
		3764	for (i = forkcnt; i--; )
		3765	if (ev_cb (forks [i]) != embed_fork_cb)
		3766	cb (EV_A_ EV_FORK, forks [i]);
		3767	#endif
		3768
		3769	#if EV_ASYNC_ENABLE
		3770	if (types & EV_ASYNC)
		3771	for (i = asynccnt; i--; )
		3772	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3773	#endif
		3774
		3775	#if EV_PREPARE_ENABLE
		3776	if (types & EV_PREPARE)
		3777	for (i = preparecnt; i--; )
		3778	# if EV_EMBED_ENABLE
		3779	if (ev_cb (prepares [i]) != embed_prepare_cb)
1608	#endif	3780	# endif
		3781	cb (EV_A_ EV_PREPARE, prepares [i]);
		3782	#endif
1609		3783
		3784	#if EV_CHECK_ENABLE
		3785	if (types & EV_CHECK)
		3786	for (i = checkcnt; i--; )
		3787	cb (EV_A_ EV_CHECK, checks [i]);
		3788	#endif
		3789
		3790	#if EV_SIGNAL_ENABLE
		3791	if (types & EV_SIGNAL)
		3792	for (i = 0; i < EV_NSIG - 1; ++i)
		3793	for (wl = signals [i].head; wl; )
		3794	{
		3795	wn = wl->next;
		3796	cb (EV_A_ EV_SIGNAL, wl);
		3797	wl = wn;
		3798	}
		3799	#endif
		3800
		3801	#if EV_CHILD_ENABLE
		3802	if (types & EV_CHILD)
		3803	for (i = (EV_PID_HASHSIZE); i--; )
		3804	for (wl = childs [i]; wl; )
		3805	{
		3806	wn = wl->next;
		3807	cb (EV_A_ EV_CHILD, wl);
		3808	wl = wn;
		3809	}
		3810	#endif
		3811	/* EV_STAT 0x00001000 /* stat data changed */
		3812	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3813	}
		3814	#endif
		3815
		3816	#if EV_MULTIPLICITY
		3817	#include "ev_wrap.h"
		3818	#endif
		3819
		3820	EV_CPP(})
		3821

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