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Comparing libev/ev.c (file contents):
Revision 1.129 by root, Fri Nov 23 05:00:44 2007 UTC vs.
Revision 1.358 by root, Sun Oct 24 14:44:40 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
40	# ifndef EV_USE_MONOTONIC	63	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	64	# define EV_USE_MONOTONIC 1
42	# endif	65	# endif
43	# ifndef EV_USE_REALTIME	66	# ifndef EV_USE_REALTIME
44	# define EV_USE_REALTIME 1	67	# define EV_USE_REALTIME 0
45	# endif	68	# endif
46	# else	69	# else
47	# ifndef EV_USE_MONOTONIC	70	# ifndef EV_USE_MONOTONIC
48	# define EV_USE_MONOTONIC 0	71	# define EV_USE_MONOTONIC 0
49	# endif	72	# endif
50	# ifndef EV_USE_REALTIME	73	# ifndef EV_USE_REALTIME
51	# define EV_USE_REALTIME 0	74	# define EV_USE_REALTIME 0
52	# endif	75	# endif
53	# endif	76	# endif
54		77
		78	# if HAVE_NANOSLEEP
55	# ifndef EV_USE_SELECT	79	# ifndef EV_USE_NANOSLEEP
56	# if HAVE_SELECT && HAVE_SYS_SELECT_H	80	# define EV_USE_NANOSLEEP EV_FEATURE_OS
57	# define EV_USE_SELECT 1
58	# else
59	# define EV_USE_SELECT 0
60	# endif	81	# endif
		82	# else
		83	# undef EV_USE_NANOSLEEP
		84	# define EV_USE_NANOSLEEP 0
61	# endif	85	# endif
62		86
		87	# if HAVE_SELECT && HAVE_SYS_SELECT_H
63	# ifndef EV_USE_POLL	88	# ifndef EV_USE_SELECT
64	# if HAVE_POLL && HAVE_POLL_H	89	# define EV_USE_SELECT EV_FEATURE_BACKENDS
65	# define EV_USE_POLL 1
66	# else
67	# define EV_USE_POLL 0
68	# endif	90	# endif
		91	# else
		92	# undef EV_USE_SELECT
		93	# define EV_USE_SELECT 0
		94	# endif
		95
		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
		102	# define EV_USE_POLL 0
69	# endif	103	# endif
70		104
71	# ifndef EV_USE_EPOLL
72	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	105	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
73	# define EV_USE_EPOLL 1	106	# ifndef EV_USE_EPOLL
74	# else	107	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
75	# define EV_USE_EPOLL 0
76	# endif	108	# endif
		109	# else
		110	# undef EV_USE_EPOLL
		111	# define EV_USE_EPOLL 0
77	# endif	112	# endif
78		113
		114	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
79	# ifndef EV_USE_KQUEUE	115	# ifndef EV_USE_KQUEUE
80	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	116	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
81	# define EV_USE_KQUEUE 1
82	# else
83	# define EV_USE_KQUEUE 0
84	# endif	117	# endif
		118	# else
		119	# undef EV_USE_KQUEUE
		120	# define EV_USE_KQUEUE 0
85	# endif	121	# endif
86		122
87	# ifndef EV_USE_PORT
88	# if HAVE_PORT_H && HAVE_PORT_CREATE	123	# if HAVE_PORT_H && HAVE_PORT_CREATE
89	# define EV_USE_PORT 1	124	# ifndef EV_USE_PORT
90	# else	125	# define EV_USE_PORT EV_FEATURE_BACKENDS
91	# define EV_USE_PORT 0
92	# endif	126	# endif
		127	# else
		128	# undef EV_USE_PORT
		129	# define EV_USE_PORT 0
93	# endif	130	# endif
94		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
95	#endif	159	#endif
96		160
97	#include <math.h>	161	#include <math.h>
98	#include <stdlib.h>	162	#include <stdlib.h>
		163	#include <string.h>
99	#include <fcntl.h>	164	#include <fcntl.h>
100	#include <stddef.h>	165	#include <stddef.h>
101		166
102	#include <stdio.h>	167	#include <stdio.h>
103		168
104	#include <assert.h>	169	#include <assert.h>
105	#include <errno.h>	170	#include <errno.h>
106	#include <sys/types.h>	171	#include <sys/types.h>
107	#include <time.h>	172	#include <time.h>
		173	#include <limits.h>
108		174
109	#include <signal.h>	175	#include <signal.h>
110		176
		177	#ifdef EV_H
		178	# include EV_H
		179	#else
		180	# include "ev.h"
		181	#endif
		182
		183	EV_CPP(extern "C" {)
		184
111	#ifndef _WIN32	185	#ifndef _WIN32
112	# include <unistd.h>
113	# include <sys/time.h>	186	# include <sys/time.h>
114	# include <sys/wait.h>	187	# include <sys/wait.h>
		188	# include <unistd.h>
115	#else	189	#else
		190	# include <io.h>
116	# define WIN32_LEAN_AND_MEAN	191	# define WIN32_LEAN_AND_MEAN
117	# include <windows.h>	192	# include <windows.h>
118	# ifndef EV_SELECT_IS_WINSOCKET	193	# ifndef EV_SELECT_IS_WINSOCKET
119	# define EV_SELECT_IS_WINSOCKET 1	194	# define EV_SELECT_IS_WINSOCKET 1
120	# endif	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
121	#endif	242	# endif
122		243	#endif
123	/**/
124		244
125	#ifndef EV_USE_MONOTONIC	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
126	# define EV_USE_MONOTONIC 0	249	# define EV_USE_MONOTONIC 0
		250	# endif
127	#endif	251	#endif
128		252
129	#ifndef EV_USE_REALTIME	253	#ifndef EV_USE_REALTIME
130	# define EV_USE_REALTIME 0	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
131	#endif	263	#endif
132		264
133	#ifndef EV_USE_SELECT	265	#ifndef EV_USE_SELECT
134	# define EV_USE_SELECT 1	266	# define EV_USE_SELECT EV_FEATURE_BACKENDS
135	#endif	267	#endif
136		268
137	#ifndef EV_USE_POLL	269	#ifndef EV_USE_POLL
138	# ifdef _WIN32	270	# ifdef _WIN32
139	# define EV_USE_POLL 0	271	# define EV_USE_POLL 0
140	# else	272	# else
141	# define EV_USE_POLL 1	273	# define EV_USE_POLL EV_FEATURE_BACKENDS
142	# endif	274	# endif
143	#endif	275	#endif
144		276
145	#ifndef EV_USE_EPOLL	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
146	# define EV_USE_EPOLL 0	281	# define EV_USE_EPOLL 0
		282	# endif
147	#endif	283	#endif
148		284
149	#ifndef EV_USE_KQUEUE	285	#ifndef EV_USE_KQUEUE
150	# define EV_USE_KQUEUE 0	286	# define EV_USE_KQUEUE 0
151	#endif	287	#endif
152		288
153	#ifndef EV_USE_PORT	289	#ifndef EV_USE_PORT
154	# define EV_USE_PORT 0	290	# define EV_USE_PORT 0
155	#endif	291	#endif
156		292
157	/**/	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
158		364
159	#ifndef CLOCK_MONOTONIC	365	#ifndef CLOCK_MONOTONIC
160	# undef EV_USE_MONOTONIC	366	# undef EV_USE_MONOTONIC
161	# define EV_USE_MONOTONIC 0	367	# define EV_USE_MONOTONIC 0
162	#endif	368	#endif
…		…
164	#ifndef CLOCK_REALTIME	370	#ifndef CLOCK_REALTIME
165	# undef EV_USE_REALTIME	371	# undef EV_USE_REALTIME
166	# define EV_USE_REALTIME 0	372	# define EV_USE_REALTIME 0
167	#endif	373	#endif
168		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
169	#if EV_SELECT_IS_WINSOCKET	396	#if EV_SELECT_IS_WINSOCKET
170	# include <winsock.h>	397	# include <winsock.h>
171	#endif	398	#endif
172		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
173	/**/	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 */
174		455
175	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	456	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
176	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	457	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
177	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
178	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
179		458
180	#ifdef EV_H	459	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
181	# include EV_H	460	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
182	#else
183	# include "ev.h"
184	#endif
185		461
186	#if __GNUC__ >= 3	462	#if __GNUC__ >= 4
187	# define expect(expr,value) __builtin_expect ((expr),(value))	463	# define expect(expr,value) __builtin_expect ((expr),(value))
188	# define inline static inline	464	# define noinline __attribute__ ((noinline))
189	#else	465	#else
190	# define expect(expr,value) (expr)	466	# define expect(expr,value) (expr)
191	# define inline static	467	# define noinline
		468	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		469	# define inline
		470	# endif
192	#endif	471	#endif
193		472
194	#define expect_false(expr) expect ((expr) != 0, 0)	473	#define expect_false(expr) expect ((expr) != 0, 0)
195	#define expect_true(expr) expect ((expr) != 0, 1)	474	#define expect_true(expr) expect ((expr) != 0, 1)
		475	#define inline_size static inline
196		476
		477	#if EV_FEATURE_CODE
		478	# define inline_speed static inline
		479	#else
		480	# define inline_speed static noinline
		481	#endif
		482
197	#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
198	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	488	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		489	#endif
199		490
200	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	491	#define EMPTY /* required for microsofts broken pseudo-c compiler */
201	#define EMPTY2(a,b) /* used to suppress some warnings */	492	#define EMPTY2(a,b) /* used to suppress some warnings */
202		493
203	typedef struct ev_watcher *W;	494	typedef ev_watcher *W;
204	typedef struct ev_watcher_list *WL;	495	typedef ev_watcher_list *WL;
205	typedef struct ev_watcher_time *WT;	496	typedef ev_watcher_time *WT;
206		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
207	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
		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
208		520
209	#ifdef _WIN32	521	#ifdef _WIN32
210	# include "ev_win32.c"	522	# include "ev_win32.c"
211	#endif	523	#endif
212		524
213	/*****************************************************************************/	525	/*****************************************************************************/
214		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
215	static void (*syserr_cb)(const char *msg);	577	static void (*syserr_cb)(const char *msg);
216		578
		579	void
217	void ev_set_syserr_cb (void (*cb)(const char *msg))	580	ev_set_syserr_cb (void (*cb)(const char *msg))
218	{	581	{
219	syserr_cb = cb;	582	syserr_cb = cb;
220	}	583	}
221		584
222	static void	585	static void noinline
223	syserr (const char *msg)	586	ev_syserr (const char *msg)
224	{	587	{
225	if (!msg)	588	if (!msg)
226	msg = "(libev) system error";	589	msg = "(libev) system error";
227		590
228	if (syserr_cb)	591	if (syserr_cb)
229	syserr_cb (msg);	592	syserr_cb (msg);
230	else	593	else
231	{	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
232	perror (msg);	603	perror (msg);
		604	#endif
233	abort ();	605	abort ();
234	}	606	}
235	}	607	}
236		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
237	static void *(*alloc)(void *ptr, long size);	628	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
238		629
		630	void
239	void ev_set_allocator (void *(*cb)(void *ptr, long size))	631	ev_set_allocator (void *(*cb)(void *ptr, long size))
240	{	632	{
241	alloc = cb;	633	alloc = cb;
242	}	634	}
243		635
244	static void *	636	inline_speed void *
245	ev_realloc (void *ptr, long size)	637	ev_realloc (void *ptr, long size)
246	{	638	{
247	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	639	ptr = alloc (ptr, size);
248		640
249	if (!ptr && size)	641	if (!ptr && size)
250	{	642	{
		643	#if EV_AVOID_STDIO
		644	ev_printerr ("libev: memory allocation failed, aborting.\n");
		645	#else
251	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	646	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		647	#endif
252	abort ();	648	abort ();
253	}	649	}
254		650
255	return ptr;	651	return ptr;
256	}	652	}
…		…
258	#define ev_malloc(size) ev_realloc (0, (size))	654	#define ev_malloc(size) ev_realloc (0, (size))
259	#define ev_free(ptr) ev_realloc ((ptr), 0)	655	#define ev_free(ptr) ev_realloc ((ptr), 0)
260		656
261	/*****************************************************************************/	657	/*****************************************************************************/
262		658
		659	/* set in reify when reification needed */
		660	#define EV_ANFD_REIFY 1
		661
		662	/* file descriptor info structure */
263	typedef struct	663	typedef struct
264	{	664	{
265	WL head;	665	WL head;
266	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 */
267	unsigned char reify;	669	unsigned char unused;
		670	#if EV_USE_EPOLL
		671	unsigned int egen; /* generation counter to counter epoll bugs */
		672	#endif
268	#if EV_SELECT_IS_WINSOCKET	673	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
269	SOCKET handle;	674	SOCKET handle;
270	#endif	675	#endif
		676	#if EV_USE_IOCP
		677	OVERLAPPED or, ow;
		678	#endif
271	} ANFD;	679	} ANFD;
272		680
		681	/* stores the pending event set for a given watcher */
273	typedef struct	682	typedef struct
274	{	683	{
275	W w;	684	W w;
276	int events;	685	int events; /* the pending event set for the given watcher */
277	} 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
278		715
279	#if EV_MULTIPLICITY	716	#if EV_MULTIPLICITY
280		717
281	struct ev_loop	718	struct ev_loop
282	{	719	{
…		…
300		737
301	static int ev_default_loop_ptr;	738	static int ev_default_loop_ptr;
302		739
303	#endif	740	#endif
304		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
		753
305	/*****************************************************************************/	754	/*****************************************************************************/
306		755
		756	#ifndef EV_HAVE_EV_TIME
307	ev_tstamp	757	ev_tstamp
308	ev_time (void)	758	ev_time (void)
309	{	759	{
310	#if EV_USE_REALTIME	760	#if EV_USE_REALTIME
		761	if (expect_true (have_realtime))
		762	{
311	struct timespec ts;	763	struct timespec ts;
312	clock_gettime (CLOCK_REALTIME, &ts);	764	clock_gettime (CLOCK_REALTIME, &ts);
313	return ts.tv_sec + ts.tv_nsec * 1e-9;	765	return ts.tv_sec + ts.tv_nsec * 1e-9;
314	#else	766	}
		767	#endif
		768
315	struct timeval tv;	769	struct timeval tv;
316	gettimeofday (&tv, 0);	770	gettimeofday (&tv, 0);
317	return tv.tv_sec + tv.tv_usec * 1e-6;	771	return tv.tv_sec + tv.tv_usec * 1e-6;
318	#endif
319	}	772	}
		773	#endif
320		774
321	inline ev_tstamp	775	inline_size ev_tstamp
322	get_clock (void)	776	get_clock (void)
323	{	777	{
324	#if EV_USE_MONOTONIC	778	#if EV_USE_MONOTONIC
325	if (expect_true (have_monotonic))	779	if (expect_true (have_monotonic))
326	{	780	{
…		…
339	{	793	{
340	return ev_rt_now;	794	return ev_rt_now;
341	}	795	}
342	#endif	796	#endif
343		797
344	#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))
345		858
346	#define array_needsize(type,base,cur,cnt,init) \	859	#define array_needsize(type,base,cur,cnt,init) \
347	if (expect_false ((cnt) > cur)) \	860	if (expect_false ((cnt) > (cur))) \
348	{ \	861	{ \
349	int newcnt = cur; \	862	int ocur_ = (cur); \
350	do \	863	(base) = (type *)array_realloc \
351	{ \	864	(sizeof (type), (base), &(cur), (cnt)); \
352	newcnt = array_roundsize (type, newcnt << 1); \	865	init ((base) + (ocur_), (cur) - ocur_); \
353	} \
354	while ((cnt) > newcnt); \
355	\
356	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
357	init (base + cur, newcnt - cur); \
358	cur = newcnt; \
359	}	866	}
360		867
		868	#if 0
361	#define array_slim(type,stem) \	869	#define array_slim(type,stem) \
362	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	870	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
363	{ \	871	{ \
364	stem ## max = array_roundsize (stem ## cnt >> 1); \	872	stem ## max = array_roundsize (stem ## cnt >> 1); \
365	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	873	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
366	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	874	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
367	}	875	}
		876	#endif
368		877
369	#define array_free(stem, idx) \	878	#define array_free(stem, idx) \
370	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
371		880
372	/*****************************************************************************/	881	/*****************************************************************************/
373		882
374	static void	883	/* dummy callback for pending events */
375	anfds_init (ANFD *base, int count)	884	static void noinline
		885	pendingcb (EV_P_ ev_prepare *w, int revents)
376	{	886	{
377	while (count--)
378	{
379	base->head = 0;
380	base->events = EV_NONE;
381	base->reify = 0;
382
383	++base;
384	}
385	}	887	}
386		888
387	void	889	void noinline
388	ev_feed_event (EV_P_ void *w, int revents)	890	ev_feed_event (EV_P_ void *w, int revents)
389	{	891	{
390	W w_ = (W)w;	892	W w_ = (W)w;
		893	int pri = ABSPRI (w_);
391		894
392	if (expect_false (w_->pending))	895	if (expect_false (w_->pending))
		896	pendings [pri][w_->pending - 1].events |= revents;
		897	else
393	{	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_;
394	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;	902	pendings [pri][w_->pending - 1].events = revents;
395	return;
396	}	903	}
397
398	w_->pending = ++pendingcnt [ABSPRI (w_)];
399	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
400	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
401	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
402	}	904	}
403		905
404	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
405	queue_events (EV_P_ W *events, int eventcnt, int type)	922	queue_events (EV_P_ W *events, int eventcnt, int type)
406	{	923	{
407	int i;	924	int i;
408		925
409	for (i = 0; i < eventcnt; ++i)	926	for (i = 0; i < eventcnt; ++i)
410	ev_feed_event (EV_A_ events [i], type);	927	ev_feed_event (EV_A_ events [i], type);
411	}	928	}
412		929
		930	/*****************************************************************************/
		931
413	inline void	932	inline_speed void
414	fd_event (EV_P_ int fd, int revents)	933	fd_event_nocheck (EV_P_ int fd, int revents)
415	{	934	{
416	ANFD *anfd = anfds + fd;	935	ANFD *anfd = anfds + fd;
417	struct ev_io *w;	936	ev_io *w;
418		937
419	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)
420	{	939	{
421	int ev = w->events & revents;	940	int ev = w->events & revents;
422		941
423	if (ev)	942	if (ev)
424	ev_feed_event (EV_A_ (W)w, ev);	943	ev_feed_event (EV_A_ (W)w, ev);
425	}	944	}
426	}	945	}
427		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
428	void	958	void
429	ev_feed_fd_event (EV_P_ int fd, int revents)	959	ev_feed_fd_event (EV_P_ int fd, int revents)
430	{	960	{
		961	if (fd >= 0 && fd < anfdmax)
431	fd_event (EV_A_ fd, revents);	962	fd_event_nocheck (EV_A_ fd, revents);
432	}	963	}
433		964
434	/*****************************************************************************/	965	/* make sure the external fd watch events are in-sync */
435		966	/* with the kernel/libev internal state */
436	inline void	967	inline_size void
437	fd_reify (EV_P)	968	fd_reify (EV_P)
438	{	969	{
439	int i;	970	int i;
440		971
441	for (i = 0; i < fdchangecnt; ++i)	972	for (i = 0; i < fdchangecnt; ++i)
442	{	973	{
443	int fd = fdchanges [i];	974	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;	975	ANFD *anfd = anfds + fd;
445	struct ev_io *w;	976	ev_io *w;
446		977
447	int events = 0;	978	unsigned char o_events = anfd->events;
		979	unsigned char o_reify = anfd->reify;
448		980
449	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	981	anfd->reify = 0;
450	events |= w->events;
451		982
452	#if EV_SELECT_IS_WINSOCKET	983	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
453	if (events)	984	if (o_reify & EV__IOFDSET)
454	{	985	{
455	unsigned long argp;	986	unsigned long arg;
456	anfd->handle = _get_osfhandle (fd);	987	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
457	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	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
458	}	990	}
459	#endif	991	#endif
460		992
461	anfd->reify = 0;	993	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
462		994	{
463	method_modify (EV_A_ fd, anfd->events, events);
464	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);
465	}	1006	}
466		1007
467	fdchangecnt = 0;	1008	fdchangecnt = 0;
468	}	1009	}
469		1010
470	static void	1011	/* something about the given fd changed */
		1012	inline_size void
471	fd_change (EV_P_ int fd)	1013	fd_change (EV_P_ int fd, int flags)
472	{	1014	{
473	if (expect_false (anfds [fd].reify))	1015	unsigned char reify = anfds [fd].reify;
474	return;
475
476	anfds [fd].reify = 1;	1016	anfds [fd].reify |= flags;
477		1017
		1018	if (expect_true (!reify))
		1019	{
478	++fdchangecnt;	1020	++fdchangecnt;
479	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	1021	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
480	fdchanges [fdchangecnt - 1] = fd;	1022	fdchanges [fdchangecnt - 1] = fd;
		1023	}
481	}	1024	}
482		1025
483	static void	1026	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		1027	inline_speed void
484	fd_kill (EV_P_ int fd)	1028	fd_kill (EV_P_ int fd)
485	{	1029	{
486	struct ev_io *w;	1030	ev_io *w;
487		1031
488	while ((w = (struct ev_io *)anfds [fd].head))	1032	while ((w = (ev_io *)anfds [fd].head))
489	{	1033	{
490	ev_io_stop (EV_A_ w);	1034	ev_io_stop (EV_A_ w);
491	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);
492	}	1036	}
493	}	1037	}
494		1038
		1039	/* check whether the given fd is actually valid, for error recovery */
495	inline int	1040	inline_size int
496	fd_valid (int fd)	1041	fd_valid (int fd)
497	{	1042	{
498	#ifdef _WIN32	1043	#ifdef _WIN32
499	return _get_osfhandle (fd) != -1;	1044	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
500	#else	1045	#else
501	return fcntl (fd, F_GETFD) != -1;	1046	return fcntl (fd, F_GETFD) != -1;
502	#endif	1047	#endif
503	}	1048	}
504		1049
505	/* called on EBADF to verify fds */	1050	/* called on EBADF to verify fds */
506	static void	1051	static void noinline
507	fd_ebadf (EV_P)	1052	fd_ebadf (EV_P)
508	{	1053	{
509	int fd;	1054	int fd;
510		1055
511	for (fd = 0; fd < anfdmax; ++fd)	1056	for (fd = 0; fd < anfdmax; ++fd)
512	if (anfds [fd].events)	1057	if (anfds [fd].events)
513	if (!fd_valid (fd) == -1 && errno == EBADF)	1058	if (!fd_valid (fd) && errno == EBADF)
514	fd_kill (EV_A_ fd);	1059	fd_kill (EV_A_ fd);
515	}	1060	}
516		1061
517	/* 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 */
518	static void	1063	static void noinline
519	fd_enomem (EV_P)	1064	fd_enomem (EV_P)
520	{	1065	{
521	int fd;	1066	int fd;
522		1067
523	for (fd = anfdmax; fd--; )	1068	for (fd = anfdmax; fd--; )
524	if (anfds [fd].events)	1069	if (anfds [fd].events)
525	{	1070	{
526	fd_kill (EV_A_ fd);	1071	fd_kill (EV_A_ fd);
527	return;	1072	break;
528	}	1073	}
529	}	1074	}
530		1075
531	/* 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 */
532	static void	1077	static void noinline
533	fd_rearm_all (EV_P)	1078	fd_rearm_all (EV_P)
534	{	1079	{
535	int fd;	1080	int fd;
536		1081
537	/* this should be highly optimised to not do anything but set a flag */
538	for (fd = 0; fd < anfdmax; ++fd)	1082	for (fd = 0; fd < anfdmax; ++fd)
539	if (anfds [fd].events)	1083	if (anfds [fd].events)
540	{	1084	{
541	anfds [fd].events = 0;	1085	anfds [fd].events = 0;
542	fd_change (EV_A_ fd);	1086	anfds [fd].emask = 0;
		1087	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
543	}	1088	}
544	}	1089	}
545		1090
546	/*****************************************************************************/	1091	/* used to prepare libev internal fd's */
547		1092	/* this is not fork-safe */
548	static void
549	upheap (WT *heap, int k)
550	{
551	WT w = heap [k];
552
553	while (k && heap [k >> 1]->at > w->at)
554	{
555	heap [k] = heap [k >> 1];
556	((W)heap [k])->active = k + 1;
557	k >>= 1;
558	}
559
560	heap [k] = w;
561	((W)heap [k])->active = k + 1;
562
563	}
564
565	static void
566	downheap (WT *heap, int N, int k)
567	{
568	WT w = heap [k];
569
570	while (k < (N >> 1))
571	{
572	int j = k << 1;
573
574	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
575	++j;
576
577	if (w->at <= heap [j]->at)
578	break;
579
580	heap [k] = heap [j];
581	((W)heap [k])->active = k + 1;
582	k = j;
583	}
584
585	heap [k] = w;
586	((W)heap [k])->active = k + 1;
587	}
588
589	inline void	1093	inline_speed void
590	adjustheap (WT *heap, int N, int k)
591	{
592	upheap (heap, k);
593	downheap (heap, N, k);
594	}
595
596	/*****************************************************************************/
597
598	typedef struct
599	{
600	WL head;
601	sig_atomic_t volatile gotsig;
602	} ANSIG;
603
604	static ANSIG *signals;
605	static int signalmax;
606
607	static int sigpipe [2];
608	static sig_atomic_t volatile gotsig;
609	static struct ev_io sigev;
610
611	static void
612	signals_init (ANSIG *base, int count)
613	{
614	while (count--)
615	{
616	base->head = 0;
617	base->gotsig = 0;
618
619	++base;
620	}
621	}
622
623	static void
624	sighandler (int signum)
625	{
626	#if _WIN32
627	signal (signum, sighandler);
628	#endif
629
630	signals [signum - 1].gotsig = 1;
631
632	if (!gotsig)
633	{
634	int old_errno = errno;
635	gotsig = 1;
636	write (sigpipe [1], &signum, 1);
637	errno = old_errno;
638	}
639	}
640
641	void
642	ev_feed_signal_event (EV_P_ int signum)
643	{
644	WL w;
645
646	#if EV_MULTIPLICITY
647	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
648	#endif
649
650	--signum;
651
652	if (signum < 0 || signum >= signalmax)
653	return;
654
655	signals [signum].gotsig = 0;
656
657	for (w = signals [signum].head; w; w = w->next)
658	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
659	}
660
661	static void
662	sigcb (EV_P_ struct ev_io *iow, int revents)
663	{
664	int signum;
665
666	read (sigpipe [0], &revents, 1);
667	gotsig = 0;
668
669	for (signum = signalmax; signum--; )
670	if (signals [signum].gotsig)
671	ev_feed_signal_event (EV_A_ signum + 1);
672	}
673
674	static void
675	fd_intern (int fd)	1094	fd_intern (int fd)
676	{	1095	{
677	#ifdef _WIN32	1096	#ifdef _WIN32
678	int arg = 1;	1097	unsigned long arg = 1;
679	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1098	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
680	#else	1099	#else
681	fcntl (fd, F_SETFD, FD_CLOEXEC);	1100	fcntl (fd, F_SETFD, FD_CLOEXEC);
682	fcntl (fd, F_SETFL, O_NONBLOCK);	1101	fcntl (fd, F_SETFL, O_NONBLOCK);
683	#endif	1102	#endif
684	}	1103	}
685		1104
		1105	/*****************************************************************************/
		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) */
686	static void	1331	static void
687	siginit (EV_P)	1332	pipecb (EV_P_ ev_io *iow, int revents)
688	{	1333	{
689	fd_intern (sigpipe [0]);	1334	int i;
690	fd_intern (sigpipe [1]);
691		1335
692	ev_io_set (&sigev, sigpipe [0], EV_READ);	1336	#if EV_USE_EVENTFD
693	ev_io_start (EV_A_ &sigev);	1337	if (evfd >= 0)
694	ev_unref (EV_A); /* child watcher should not keep loop alive */	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	}
		1349
		1350	if (sig_pending)
		1351	{
		1352	sig_pending = 0;
		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
695	}	1372	}
696		1373
697	/*****************************************************************************/	1374	/*****************************************************************************/
698		1375
699	static struct ev_child *childs [PID_HASHSIZE];	1376	static void
		1377	ev_sighandler (int signum)
		1378	{
		1379	#if EV_MULTIPLICITY
		1380	EV_P = signals [signum - 1].loop;
		1381	#endif
700		1382
701	#ifndef _WIN32	1383	#ifdef _WIN32
		1384	signal (signum, ev_sighandler);
		1385	#endif
702		1386
		1387	signals [signum - 1].pending = 1;
		1388	evpipe_write (EV_A_ &sig_pending);
		1389	}
		1390
		1391	void noinline
		1392	ev_feed_signal_event (EV_P_ int signum)
		1393	{
		1394	WL w;
		1395
		1396	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1397	return;
		1398
		1399	--signum;
		1400
		1401	#if EV_MULTIPLICITY
		1402	/* it is permissible to try to feed a signal to the wrong loop */
		1403	/* or, likely more useful, feeding a signal nobody is waiting for */
		1404
		1405	if (expect_false (signals [signum].loop != EV_A))
		1406	return;
		1407	#endif
		1408
		1409	signals [signum].pending = 0;
		1410
		1411	for (w = signals [signum].head; w; w = w->next)
		1412	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1413	}
		1414
		1415	#if EV_USE_SIGNALFD
		1416	static void
		1417	sigfdcb (EV_P_ ev_io *iow, int revents)
		1418	{
		1419	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1420
		1421	for (;;)
		1422	{
		1423	ssize_t res = read (sigfd, si, sizeof (si));
		1424
		1425	/* not ISO-C, as res might be -1, but works with SuS */
		1426	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1427	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1428
		1429	if (res < (ssize_t)sizeof (si))
		1430	break;
		1431	}
		1432	}
		1433	#endif
		1434
		1435	#endif
		1436
		1437	/*****************************************************************************/
		1438
		1439	#if EV_CHILD_ENABLE
		1440	static WL childs [EV_PID_HASHSIZE];
		1441
703	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	}
704		1467
705	#ifndef WCONTINUED	1468	#ifndef WCONTINUED
706	# define WCONTINUED 0	1469	# define WCONTINUED 0
707	#endif	1470	#endif
708		1471
		1472	/* called on sigchld etc., calls waitpid */
709	static void	1473	static void
710	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
711	{
712	struct ev_child *w;
713
714	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
715	if (w->pid == pid || !w->pid)
716	{
717	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
718	w->rpid = pid;
719	w->rstatus = status;
720	ev_feed_event (EV_A_ (W)w, EV_CHILD);
721	}
722	}
723
724	static void
725	childcb (EV_P_ struct ev_signal *sw, int revents)	1474	childcb (EV_P_ ev_signal *sw, int revents)
726	{	1475	{
727	int pid, status;	1476	int pid, status;
728		1477
		1478	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
729	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1479	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
730	{	1480	if (!WCONTINUED
		1481	|| errno != EINVAL
		1482	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1483	return;
		1484
731	/* 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 */
732	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1487	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
733		1488
734	child_reap (EV_A_ sw, pid, pid, status);	1489	child_reap (EV_A_ pid, pid, status);
		1490	if ((EV_PID_HASHSIZE) > 1)
735	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 */
736	}
737	}	1492	}
738		1493
739	#endif	1494	#endif
740		1495
741	/*****************************************************************************/	1496	/*****************************************************************************/
742		1497
		1498	#if EV_USE_IOCP
		1499	# include "ev_iocp.c"
		1500	#endif
743	#if EV_USE_PORT	1501	#if EV_USE_PORT
744	# include "ev_port.c"	1502	# include "ev_port.c"
745	#endif	1503	#endif
746	#if EV_USE_KQUEUE	1504	#if EV_USE_KQUEUE
747	# include "ev_kqueue.c"	1505	# include "ev_kqueue.c"
…		…
767	{	1525	{
768	return EV_VERSION_MINOR;	1526	return EV_VERSION_MINOR;
769	}	1527	}
770		1528
771	/* 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 */
772	static int	1530	int inline_size
773	enable_secure (void)	1531	enable_secure (void)
774	{	1532	{
775	#ifdef _WIN32	1533	#ifdef _WIN32
776	return 0;	1534	return 0;
777	#else	1535	#else
…		…
781	}	1539	}
782		1540
783	unsigned int	1541	unsigned int
784	ev_supported_backends (void)	1542	ev_supported_backends (void)
785	{	1543	{
786	}
787
788	unsigned int
789	ev_recommended_backends (void)
790	{
791	unsigned int flags;	1544	unsigned int flags = 0;
792		1545
793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	1546	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
794	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;	1547	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
795	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;	1548	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
796	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;	1549	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
…		…
798		1551
799	return flags;	1552	return flags;
800	}	1553	}
801		1554
802	unsigned int	1555	unsigned int
803	ev_backend (EV_P)	1556	ev_recommended_backends (void)
804	{	1557	{
805	unsigned int flags = ev_recommended_backends ();	1558	unsigned int flags = ev_supported_backends ();
806		1559
807	#ifndef __NetBSD__	1560	#ifndef __NetBSD__
808	/* kqueue is borked on everything but netbsd apparently */	1561	/* kqueue is borked on everything but netbsd apparently */
809	/* it usually doesn't work correctly on anything but sockets and pipes */	1562	/* it usually doesn't work correctly on anything but sockets and pipes */
810	flags &= ~EVBACKEND_KQUEUE;	1563	flags &= ~EVBACKEND_KQUEUE;
811	#endif	1564	#endif
812	#ifdef __APPLE__	1565	#ifdef __APPLE__
813	// flags &= ~EVBACKEND_KQUEUE; for documentation	1566	/* only select works correctly on that "unix-certified" platform */
814	flags &= ~EVBACKEND_POLL;	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) */
815	#endif	1572	#endif
816		1573
817	return flags;	1574	return flags;
818	}	1575	}
819		1576
820	static void	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
		1603	ev_depth (EV_P)
		1604	{
		1605	return loop_depth;
		1606	}
		1607
		1608	void
		1609	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1610	{
		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
821	loop_init (EV_P_ unsigned int flags)	1646	loop_init (EV_P_ unsigned int flags)
822	{	1647	{
823	if (!method)	1648	if (!backend)
824	{	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
825	#if EV_USE_MONOTONIC	1660	#if EV_USE_MONOTONIC
		1661	if (!have_monotonic)
826	{	1662	{
827	struct timespec ts;	1663	struct timespec ts;
		1664
828	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1665	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
829	have_monotonic = 1;	1666	have_monotonic = 1;
830	}	1667	}
831	#endif	1668	#endif
832		1669
833	ev_rt_now = ev_time ();	1670	/* pid check not overridable via env */
834	mn_now = get_clock ();	1671	#ifndef _WIN32
835	now_floor = mn_now;	1672	if (flags & EVFLAG_FORKCHECK)
836	rtmn_diff = ev_rt_now - mn_now;	1673	curpid = getpid ();
		1674	#endif
837		1675
838	if (!(flags & EVFLAG_NOENV)	1676	if (!(flags & EVFLAG_NOENV)
839	&& !enable_secure ()	1677	&& !enable_secure ()
840	&& getenv ("LIBEV_FLAGS"))	1678	&& getenv ("LIBEV_FLAGS"))
841	flags = atoi (getenv ("LIBEV_FLAGS"));	1679	flags = atoi (getenv ("LIBEV_FLAGS"));
842		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
843	if (!(flags & 0x0000ffffUL))	1704	if (!(flags & 0x0000ffffU))
844	flags |= ev_recommended_backends ();	1705	flags |= ev_recommended_backends ();
845		1706
846	method = 0;	1707	#if EV_USE_IOCP
		1708	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1709	#endif
847	#if EV_USE_PORT	1710	#if EV_USE_PORT
848	if (!method && (flags & EVBACKEND_PORT )) method = port_init (EV_A_ flags);	1711	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
849	#endif	1712	#endif
850	#if EV_USE_KQUEUE	1713	#if EV_USE_KQUEUE
851	if (!method && (flags & EVBACKEND_KQUEUE)) method = kqueue_init (EV_A_ flags);	1714	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
852	#endif	1715	#endif
853	#if EV_USE_EPOLL	1716	#if EV_USE_EPOLL
854	if (!method && (flags & EVBACKEND_EPOLL )) method = epoll_init (EV_A_ flags);	1717	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
855	#endif	1718	#endif
856	#if EV_USE_POLL	1719	#if EV_USE_POLL
857	if (!method && (flags & EVBACKEND_POLL )) method = poll_init (EV_A_ flags);	1720	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
858	#endif	1721	#endif
859	#if EV_USE_SELECT	1722	#if EV_USE_SELECT
860	if (!method && (flags & EVBACKEND_SELECT)) method = select_init (EV_A_ flags);	1723	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
861	#endif	1724	#endif
862		1725
		1726	ev_prepare_init (&pending_w, pendingcb);
		1727
		1728	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
863	ev_init (&sigev, sigcb);	1729	ev_init (&pipe_w, pipecb);
864	ev_set_priority (&sigev, EV_MAXPRI);	1730	ev_set_priority (&pipe_w, EV_MAXPRI);
		1731	#endif
865	}	1732	}
866	}	1733	}
867		1734
868	static void	1735	/* free up a loop structure */
		1736	static void noinline
869	loop_destroy (EV_P)	1737	loop_destroy (EV_P)
870	{	1738	{
871	int i;	1739	int i;
872		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
873	#if EV_USE_PORT	1774	#if EV_USE_PORT
874	if (method == EVBACKEND_PORT ) port_destroy (EV_A);	1775	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
875	#endif	1776	#endif
876	#if EV_USE_KQUEUE	1777	#if EV_USE_KQUEUE
877	if (method == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1778	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
878	#endif	1779	#endif
879	#if EV_USE_EPOLL	1780	#if EV_USE_EPOLL
880	if (method == EVBACKEND_EPOLL ) epoll_destroy (EV_A);	1781	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
881	#endif	1782	#endif
882	#if EV_USE_POLL	1783	#if EV_USE_POLL
883	if (method == EVBACKEND_POLL ) poll_destroy (EV_A);	1784	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
884	#endif	1785	#endif
885	#if EV_USE_SELECT	1786	#if EV_USE_SELECT
886	if (method == EVBACKEND_SELECT) select_destroy (EV_A);	1787	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
887	#endif	1788	#endif
888		1789
889	for (i = NUMPRI; i--; )	1790	for (i = NUMPRI; i--; )
		1791	{
890	array_free (pending, [i]);	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;
891		1799
892	/* have to use the microsoft-never-gets-it-right macro */	1800	/* have to use the microsoft-never-gets-it-right macro */
		1801	array_free (rfeed, EMPTY);
893	array_free (fdchange, EMPTY0);	1802	array_free (fdchange, EMPTY);
894	array_free (timer, EMPTY0);	1803	array_free (timer, EMPTY);
895	#if EV_PERIODICS	1804	#if EV_PERIODIC_ENABLE
896	array_free (periodic, EMPTY0);	1805	array_free (periodic, EMPTY);
897	#endif	1806	#endif
		1807	#if EV_FORK_ENABLE
898	array_free (idle, EMPTY0);	1808	array_free (fork, EMPTY);
		1809	#endif
899	array_free (prepare, EMPTY0);	1810	array_free (prepare, EMPTY);
900	array_free (check, EMPTY0);	1811	array_free (check, EMPTY);
		1812	#if EV_ASYNC_ENABLE
		1813	array_free (async, EMPTY);
		1814	#endif
901		1815
902	method = 0;	1816	backend = 0;
903	}	1817	}
904		1818
905	static void	1819	#if EV_USE_INOTIFY
		1820	inline_size void infy_fork (EV_P);
		1821	#endif
		1822
		1823	inline_size void
906	loop_fork (EV_P)	1824	loop_fork (EV_P)
907	{	1825	{
908	#if EV_USE_PORT	1826	#if EV_USE_PORT
909	if (method == EVBACKEND_PORT ) port_fork (EV_A);	1827	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
910	#endif	1828	#endif
911	#if EV_USE_KQUEUE	1829	#if EV_USE_KQUEUE
912	if (method == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1830	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
913	#endif	1831	#endif
914	#if EV_USE_EPOLL	1832	#if EV_USE_EPOLL
915	if (method == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1833	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
916	#endif	1834	#endif
		1835	#if EV_USE_INOTIFY
		1836	infy_fork (EV_A);
		1837	#endif
917		1838
918	if (ev_is_active (&sigev))	1839	if (ev_is_active (&pipe_w))
919	{	1840	{
920	/* default loop */	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
921		1847
922	ev_ref (EV_A);	1848	ev_ref (EV_A);
923	ev_io_stop (EV_A_ &sigev);	1849	ev_io_stop (EV_A_ &pipe_w);
924	close (sigpipe [0]);
925	close (sigpipe [1]);
926		1850
927	while (pipe (sigpipe))	1851	#if EV_USE_EVENTFD
928	syserr ("(libev) error creating pipe");	1852	if (evfd >= 0)
		1853	close (evfd);
		1854	#endif
929		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
930	siginit (EV_A);	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
931	}	1867	}
932		1868
933	postfork = 0;	1869	postfork = 0;
934	}	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)
		1955	{
		1956	verify_watcher (EV_A_ (W)w);
		1957	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
		1958	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1959	}
		1960
		1961	assert (timermax >= timercnt);
		1962	verify_heap (EV_A_ timers, timercnt);
		1963
		1964	#if EV_PERIODIC_ENABLE
		1965	assert (periodicmax >= periodiccnt);
		1966	verify_heap (EV_A_ periodics, periodiccnt);
		1967	#endif
		1968
		1969	for (i = NUMPRI; 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	}
		1978
		1979	#if EV_FORK_ENABLE
		1980	assert (forkmax >= forkcnt);
		1981	array_verify (EV_A_ (W *)forks, forkcnt);
		1982	#endif
		1983
		1984	#if EV_ASYNC_ENABLE
		1985	assert (asyncmax >= asynccnt);
		1986	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1987	#endif
		1988
		1989	#if EV_PREPARE_ENABLE
		1990	assert (preparemax >= preparecnt);
		1991	array_verify (EV_A_ (W *)prepares, preparecnt);
		1992	#endif
		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
		2004	# endif
		2005	#endif
		2006	}
		2007	#endif
935		2008
936	#if EV_MULTIPLICITY	2009	#if EV_MULTIPLICITY
937	struct ev_loop *	2010	struct ev_loop *
938	ev_loop_new (unsigned int flags)
939	{
940	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
941
942	memset (loop, 0, sizeof (struct ev_loop));
943
944	loop_init (EV_A_ flags);
945
946	if (ev_method (EV_A))
947	return loop;
948
949	return 0;
950	}
951
952	void
953	ev_loop_destroy (EV_P)
954	{
955	loop_destroy (EV_A);
956	ev_free (loop);
957	}
958
959	void
960	ev_loop_fork (EV_P)
961	{
962	postfork = 1;
963	}
964
965	#endif
966
967	#if EV_MULTIPLICITY
968	struct ev_loop *
969	ev_default_loop_init (unsigned int flags)
970	#else	2011	#else
971	int	2012	int
		2013	#endif
972	ev_default_loop (unsigned int flags)	2014	ev_default_loop (unsigned int flags)
973	#endif
974	{	2015	{
975	if (sigpipe [0] == sigpipe [1])
976	if (pipe (sigpipe))
977	return 0;
978
979	if (!ev_default_loop_ptr)	2016	if (!ev_default_loop_ptr)
980	{	2017	{
981	#if EV_MULTIPLICITY	2018	#if EV_MULTIPLICITY
982	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	2019	EV_P = ev_default_loop_ptr = &default_loop_struct;
983	#else	2020	#else
984	ev_default_loop_ptr = 1;	2021	ev_default_loop_ptr = 1;
985	#endif	2022	#endif
986		2023
987	loop_init (EV_A_ flags);	2024	loop_init (EV_A_ flags);
988		2025
989	if (ev_method (EV_A))	2026	if (ev_backend (EV_A))
990	{	2027	{
991	siginit (EV_A);	2028	#if EV_CHILD_ENABLE
992
993	#ifndef _WIN32
994	ev_signal_init (&childev, childcb, SIGCHLD);	2029	ev_signal_init (&childev, childcb, SIGCHLD);
995	ev_set_priority (&childev, EV_MAXPRI);	2030	ev_set_priority (&childev, EV_MAXPRI);
996	ev_signal_start (EV_A_ &childev);	2031	ev_signal_start (EV_A_ &childev);
997	ev_unref (EV_A); /* child watcher should not keep loop alive */	2032	ev_unref (EV_A); /* child watcher should not keep loop alive */
998	#endif	2033	#endif
…		…
1006		2041
1007	void	2042	void
1008	ev_default_destroy (void)	2043	ev_default_destroy (void)
1009	{	2044	{
1010	#if EV_MULTIPLICITY	2045	#if EV_MULTIPLICITY
1011	struct ev_loop *loop = ev_default_loop_ptr;	2046	EV_P = ev_default_loop_ptr;
1012	#endif	2047	#endif
1013		2048
1014	#ifndef _WIN32	2049	ev_default_loop_ptr = 0;
		2050
		2051	#if EV_CHILD_ENABLE
1015	ev_ref (EV_A); /* child watcher */	2052	ev_ref (EV_A); /* child watcher */
1016	ev_signal_stop (EV_A_ &childev);	2053	ev_signal_stop (EV_A_ &childev);
1017	#endif	2054	#endif
1018		2055
1019	ev_ref (EV_A); /* signal watcher */
1020	ev_io_stop (EV_A_ &sigev);
1021
1022	close (sigpipe [0]); sigpipe [0] = 0;
1023	close (sigpipe [1]); sigpipe [1] = 0;
1024
1025	loop_destroy (EV_A);	2056	loop_destroy (EV_A);
1026	}	2057	}
1027		2058
1028	void	2059	void
1029	ev_default_fork (void)	2060	ev_default_fork (void)
1030	{	2061	{
1031	#if EV_MULTIPLICITY	2062	#if EV_MULTIPLICITY
1032	struct ev_loop *loop = ev_default_loop_ptr;	2063	EV_P = ev_default_loop_ptr;
1033	#endif	2064	#endif
1034		2065
1035	if (method)	2066	postfork = 1; /* must be in line with ev_loop_fork */
1036	postfork = 1;
1037	}	2067	}
1038		2068
1039	/*****************************************************************************/	2069	/*****************************************************************************/
1040		2070
1041	static int	2071	void
1042	any_pending (EV_P)	2072	ev_invoke (EV_P_ void *w, int revents)
		2073	{
		2074	EV_CB_INVOKE ((W)w, revents);
		2075	}
		2076
		2077	unsigned int
		2078	ev_pending_count (EV_P)
1043	{	2079	{
1044	int pri;	2080	int pri;
		2081	unsigned int count = 0;
1045		2082
1046	for (pri = NUMPRI; pri--; )	2083	for (pri = NUMPRI; pri--; )
1047	if (pendingcnt [pri])	2084	count += pendingcnt [pri];
1048	return 1;
1049		2085
1050	return 0;	2086	return count;
1051	}	2087	}
1052		2088
1053	inline void	2089	void noinline
1054	call_pending (EV_P)	2090	ev_invoke_pending (EV_P)
1055	{	2091	{
1056	int pri;	2092	int pri;
1057		2093
1058	for (pri = NUMPRI; pri--; )	2094	for (pri = NUMPRI; pri--; )
1059	while (pendingcnt [pri])	2095	while (pendingcnt [pri])
1060	{	2096	{
1061	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2097	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1062		2098
1063	if (expect_true (p->w))	2099	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1064	{	2100	/* ^ this is no longer true, as pending_w could be here */
		2101
1065	p->w->pending = 0;	2102	p->w->pending = 0;
1066	EV_CB_INVOKE (p->w, p->events);	2103	EV_CB_INVOKE (p->w, p->events);
1067	}	2104	EV_FREQUENT_CHECK;
1068	}	2105	}
1069	}	2106	}
1070		2107
		2108	#if EV_IDLE_ENABLE
		2109	/* make idle watchers pending. this handles the "call-idle */
		2110	/* only when higher priorities are idle" logic */
1071	inline void	2111	inline_size void
		2112	idle_reify (EV_P)
		2113	{
		2114	if (expect_false (idleall))
		2115	{
		2116	int pri;
		2117
		2118	for (pri = NUMPRI; pri--; )
		2119	{
		2120	if (pendingcnt [pri])
		2121	break;
		2122
		2123	if (idlecnt [pri])
		2124	{
		2125	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		2126	break;
		2127	}
		2128	}
		2129	}
		2130	}
		2131	#endif
		2132
		2133	/* make timers pending */
		2134	inline_size void
1072	timers_reify (EV_P)	2135	timers_reify (EV_P)
1073	{	2136	{
		2137	EV_FREQUENT_CHECK;
		2138
1074	while (timercnt && ((WT)timers [0])->at <= mn_now)	2139	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1075	{	2140	{
1076	struct ev_timer *w = timers [0];	2141	do
1077
1078	assert (("inactive timer on timer heap detected", ev_is_active (w)));
1079
1080	/* first reschedule or stop timer */
1081	if (w->repeat)
1082	{	2142	{
		2143	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		2144
		2145	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		2146
		2147	/* first reschedule or stop timer */
		2148	if (w->repeat)
		2149	{
		2150	ev_at (w) += w->repeat;
		2151	if (ev_at (w) < mn_now)
		2152	ev_at (w) = mn_now;
		2153
1083	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	2154	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1084		2155
1085	((WT)w)->at += w->repeat;	2156	ANHE_at_cache (timers [HEAP0]);
1086	if (((WT)w)->at < mn_now)
1087	((WT)w)->at = mn_now;
1088
1089	downheap ((WT *)timers, timercnt, 0);	2157	downheap (timers, timercnt, HEAP0);
		2158	}
		2159	else
		2160	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2161
		2162	EV_FREQUENT_CHECK;
		2163	feed_reverse (EV_A_ (W)w);
1090	}	2164	}
1091	else	2165	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1092	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1093		2166
1094	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	2167	feed_reverse_done (EV_A_ EV_TIMER);
1095	}	2168	}
1096	}	2169	}
1097		2170
1098	#if EV_PERIODICS	2171	#if EV_PERIODIC_ENABLE
		2172	/* make periodics pending */
1099	inline void	2173	inline_size void
1100	periodics_reify (EV_P)	2174	periodics_reify (EV_P)
1101	{	2175	{
		2176	EV_FREQUENT_CHECK;
		2177
1102	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	2178	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1103	{	2179	{
1104	struct ev_periodic *w = periodics [0];	2180	int feed_count = 0;
1105		2181
		2182	do
		2183	{
		2184	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2185
1106	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	2186	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1107		2187
1108	/* first reschedule or stop timer */	2188	/* first reschedule or stop timer */
		2189	if (w->reschedule_cb)
		2190	{
		2191	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2192
		2193	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		2194
		2195	ANHE_at_cache (periodics [HEAP0]);
		2196	downheap (periodics, periodiccnt, HEAP0);
		2197	}
		2198	else if (w->interval)
		2199	{
		2200	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2201	/* if next trigger time is not sufficiently in the future, put it there */
		2202	/* this might happen because of floating point inexactness */
		2203	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2204	{
		2205	ev_at (w) += w->interval;
		2206
		2207	/* if interval is unreasonably low we might still have a time in the past */
		2208	/* so correct this. this will make the periodic very inexact, but the user */
		2209	/* has effectively asked to get triggered more often than possible */
		2210	if (ev_at (w) < ev_rt_now)
		2211	ev_at (w) = ev_rt_now;
		2212	}
		2213
		2214	ANHE_at_cache (periodics [HEAP0]);
		2215	downheap (periodics, periodiccnt, HEAP0);
		2216	}
		2217	else
		2218	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2219
		2220	EV_FREQUENT_CHECK;
		2221	feed_reverse (EV_A_ (W)w);
		2222	}
		2223	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		2224
		2225	feed_reverse_done (EV_A_ EV_PERIODIC);
		2226	}
		2227	}
		2228
		2229	/* simply recalculate all periodics */
		2230	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		2231	static void noinline
		2232	periodics_reschedule (EV_P)
		2233	{
		2234	int i;
		2235
		2236	/* adjust periodics after time jump */
		2237	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		2238	{
		2239	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		2240
1109	if (w->reschedule_cb)	2241	if (w->reschedule_cb)
		2242	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2243	else if (w->interval)
		2244	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2245
		2246	ANHE_at_cache (periodics [i]);
		2247	}
		2248
		2249	reheap (periodics, periodiccnt);
		2250	}
		2251	#endif
		2252
		2253	/* adjust all timers by a given offset */
		2254	static void noinline
		2255	timers_reschedule (EV_P_ ev_tstamp adjust)
		2256	{
		2257	int i;
		2258
		2259	for (i = 0; i < timercnt; ++i)
		2260	{
		2261	ANHE *he = timers + i + HEAP0;
		2262	ANHE_w (*he)->at += adjust;
		2263	ANHE_at_cache (*he);
		2264	}
		2265	}
		2266
		2267	/* fetch new monotonic and realtime times from the kernel */
		2268	/* also detect if there was a timejump, and act accordingly */
		2269	inline_speed void
		2270	time_update (EV_P_ ev_tstamp max_block)
		2271	{
		2272	#if EV_USE_MONOTONIC
		2273	if (expect_true (have_monotonic))
		2274	{
		2275	int i;
		2276	ev_tstamp odiff = rtmn_diff;
		2277
		2278	mn_now = get_clock ();
		2279
		2280	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		2281	/* interpolate in the meantime */
		2282	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1110	{	2283	{
1111	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	2284	ev_rt_now = rtmn_diff + mn_now;
1112	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	2285	return;
1113	downheap ((WT *)periodics, periodiccnt, 0);
1114	}	2286	}
1115	else if (w->interval)
1116	{
1117	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1118	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1119	downheap ((WT *)periodics, periodiccnt, 0);
1120	}
1121	else
1122	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1123		2287
1124	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1125	}
1126	}
1127
1128	static void
1129	periodics_reschedule (EV_P)
1130	{
1131	int i;
1132
1133	/* adjust periodics after time jump */
1134	for (i = 0; i < periodiccnt; ++i)
1135	{
1136	struct ev_periodic *w = periodics [i];
1137
1138	if (w->reschedule_cb)
1139	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1140	else if (w->interval)
1141	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1142	}
1143
1144	/* now rebuild the heap */
1145	for (i = periodiccnt >> 1; i--; )
1146	downheap ((WT *)periodics, periodiccnt, i);
1147	}
1148	#endif
1149
1150	inline int
1151	time_update_monotonic (EV_P)
1152	{
1153	mn_now = get_clock ();
1154
1155	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1156	{
1157	ev_rt_now = rtmn_diff + mn_now;
1158	return 0;
1159	}
1160	else
1161	{
1162	now_floor = mn_now;	2288	now_floor = mn_now;
1163	ev_rt_now = ev_time ();	2289	ev_rt_now = ev_time ();
1164	return 1;
1165	}
1166	}
1167		2290
1168	inline void	2291	/* loop a few times, before making important decisions.
1169	time_update (EV_P)	2292	* on the choice of "4": one iteration isn't enough,
1170	{	2293	* in case we get preempted during the calls to
1171	int i;	2294	* ev_time and get_clock. a second call is almost guaranteed
1172		2295	* to succeed in that case, though. and looping a few more times
1173	#if EV_USE_MONOTONIC	2296	* doesn't hurt either as we only do this on time-jumps or
1174	if (expect_true (have_monotonic))	2297	* in the unlikely event of having been preempted here.
1175	{	2298	*/
1176	if (time_update_monotonic (EV_A))	2299	for (i = 4; --i; )
1177	{	2300	{
1178	ev_tstamp odiff = rtmn_diff;
1179
1180	for (i = 4; --i; ) /* loop a few times, before making important decisions */
1181	{
1182	rtmn_diff = ev_rt_now - mn_now;	2301	rtmn_diff = ev_rt_now - mn_now;
1183		2302
1184	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	2303	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1185	return; /* all is well */	2304	return; /* all is well */
1186		2305
1187	ev_rt_now = ev_time ();	2306	ev_rt_now = ev_time ();
1188	mn_now = get_clock ();	2307	mn_now = get_clock ();
1189	now_floor = mn_now;	2308	now_floor = mn_now;
1190	}	2309	}
1191		2310
		2311	/* no timer adjustment, as the monotonic clock doesn't jump */
		2312	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1192	# if EV_PERIODICS	2313	# if EV_PERIODIC_ENABLE
		2314	periodics_reschedule (EV_A);
		2315	# endif
		2316	}
		2317	else
		2318	#endif
		2319	{
		2320	ev_rt_now = ev_time ();
		2321
		2322	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		2323	{
		2324	/* adjust timers. this is easy, as the offset is the same for all of them */
		2325	timers_reschedule (EV_A_ ev_rt_now - mn_now);
		2326	#if EV_PERIODIC_ENABLE
1193	periodics_reschedule (EV_A);	2327	periodics_reschedule (EV_A);
1194	# endif	2328	#endif
1195	/* no timer adjustment, as the monotonic clock doesn't jump */
1196	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1197	}	2329	}
1198	}
1199	else
1200	#endif
1201	{
1202	ev_rt_now = ev_time ();
1203
1204	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1205	{
1206	#if EV_PERIODICS
1207	periodics_reschedule (EV_A);
1208	#endif
1209
1210	/* adjust timers. this is easy, as the offset is the same for all */
1211	for (i = 0; i < timercnt; ++i)
1212	((WT)timers [i])->at += ev_rt_now - mn_now;
1213	}
1214		2330
1215	mn_now = ev_rt_now;	2331	mn_now = ev_rt_now;
1216	}	2332	}
1217	}	2333	}
1218		2334
1219	void	2335	void
1220	ev_ref (EV_P)
1221	{
1222	++activecnt;
1223	}
1224
1225	void
1226	ev_unref (EV_P)
1227	{
1228	--activecnt;
1229	}
1230
1231	static int loop_done;
1232
1233	void
1234	ev_loop (EV_P_ int flags)	2336	ev_run (EV_P_ int flags)
1235	{	2337	{
1236	double block;	2338	#if EV_FEATURE_API
1237	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	2339	++loop_depth;
		2340	#endif
1238		2341
1239	while (activecnt)	2342	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
		2343
		2344	loop_done = EVBREAK_CANCEL;
		2345
		2346	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
		2347
		2348	do
1240	{	2349	{
		2350	#if EV_VERIFY >= 2
		2351	ev_verify (EV_A);
		2352	#endif
		2353
		2354	#ifndef _WIN32
		2355	if (expect_false (curpid)) /* penalise the forking check even more */
		2356	if (expect_false (getpid () != curpid))
		2357	{
		2358	curpid = getpid ();
		2359	postfork = 1;
		2360	}
		2361	#endif
		2362
		2363	#if EV_FORK_ENABLE
		2364	/* we might have forked, so queue fork handlers */
		2365	if (expect_false (postfork))
		2366	if (forkcnt)
		2367	{
		2368	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		2369	EV_INVOKE_PENDING;
		2370	}
		2371	#endif
		2372
		2373	#if EV_PREPARE_ENABLE
1241	/* queue check watchers (and execute them) */	2374	/* queue prepare watchers (and execute them) */
1242	if (expect_false (preparecnt))	2375	if (expect_false (preparecnt))
1243	{	2376	{
1244	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2377	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1245	call_pending (EV_A);	2378	EV_INVOKE_PENDING;
1246	}	2379	}
		2380	#endif
		2381
		2382	if (expect_false (loop_done))
		2383	break;
1247		2384
1248	/* we might have forked, so reify kernel state if necessary */	2385	/* we might have forked, so reify kernel state if necessary */
1249	if (expect_false (postfork))	2386	if (expect_false (postfork))
1250	loop_fork (EV_A);	2387	loop_fork (EV_A);
1251		2388
1252	/* update fd-related kernel structures */	2389	/* update fd-related kernel structures */
1253	fd_reify (EV_A);	2390	fd_reify (EV_A);
1254		2391
1255	/* calculate blocking time */	2392	/* calculate blocking time */
		2393	{
		2394	ev_tstamp waittime = 0.;
		2395	ev_tstamp sleeptime = 0.;
1256		2396
1257	/* we only need this for !monotonic clock or timers, but as we basically	2397	/* remember old timestamp for io_blocktime calculation */
1258	always have timers, we just calculate it always */	2398	ev_tstamp prev_mn_now = mn_now;
1259	#if EV_USE_MONOTONIC	2399
1260	if (expect_true (have_monotonic))	2400	/* update time to cancel out callback processing overhead */
1261	time_update_monotonic (EV_A);	2401	time_update (EV_A_ 1e100);
1262	else	2402
1263	#endif	2403	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1264	{	2404	{
1265	ev_rt_now = ev_time ();
1266	mn_now = ev_rt_now;
1267	}
1268
1269	if (flags & EVLOOP_NONBLOCK || idlecnt)
1270	block = 0.;
1271	else
1272	{
1273	block = MAX_BLOCKTIME;	2405	waittime = MAX_BLOCKTIME;
1274		2406
1275	if (timercnt)	2407	if (timercnt)
1276	{	2408	{
1277	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	2409	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1278	if (block > to) block = to;	2410	if (waittime > to) waittime = to;
1279	}	2411	}
1280		2412
1281	#if EV_PERIODICS	2413	#if EV_PERIODIC_ENABLE
1282	if (periodiccnt)	2414	if (periodiccnt)
1283	{	2415	{
1284	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	2416	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1285	if (block > to) block = to;	2417	if (waittime > to) waittime = to;
1286	}	2418	}
1287	#endif	2419	#endif
1288		2420
1289	if (expect_false (block < 0.)) block = 0.;	2421	/* don't let timeouts decrease the waittime below timeout_blocktime */
		2422	if (expect_false (waittime < timeout_blocktime))
		2423	waittime = timeout_blocktime;
		2424
		2425	/* extra check because io_blocktime is commonly 0 */
		2426	if (expect_false (io_blocktime))
		2427	{
		2428	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2429
		2430	if (sleeptime > waittime - backend_fudge)
		2431	sleeptime = waittime - backend_fudge;
		2432
		2433	if (expect_true (sleeptime > 0.))
		2434	{
		2435	ev_sleep (sleeptime);
		2436	waittime -= sleeptime;
		2437	}
		2438	}
1290	}	2439	}
1291		2440
1292	method_poll (EV_A_ block);	2441	#if EV_FEATURE_API
		2442	++loop_count;
		2443	#endif
		2444	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
		2445	backend_poll (EV_A_ waittime);
		2446	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1293		2447
1294	/* update ev_rt_now, do magic */	2448	/* update ev_rt_now, do magic */
1295	time_update (EV_A);	2449	time_update (EV_A_ waittime + sleeptime);
		2450	}
1296		2451
1297	/* queue pending timers and reschedule them */	2452	/* queue pending timers and reschedule them */
1298	timers_reify (EV_A); /* relative timers called last */	2453	timers_reify (EV_A); /* relative timers called last */
1299	#if EV_PERIODICS	2454	#if EV_PERIODIC_ENABLE
1300	periodics_reify (EV_A); /* absolute timers called first */	2455	periodics_reify (EV_A); /* absolute timers called first */
1301	#endif	2456	#endif
1302		2457
		2458	#if EV_IDLE_ENABLE
1303	/* queue idle watchers unless io or timers are pending */	2459	/* queue idle watchers unless other events are pending */
1304	if (idlecnt && !any_pending (EV_A))	2460	idle_reify (EV_A);
1305	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2461	#endif
1306		2462
		2463	#if EV_CHECK_ENABLE
1307	/* queue check watchers, to be executed first */	2464	/* queue check watchers, to be executed first */
1308	if (expect_false (checkcnt))	2465	if (expect_false (checkcnt))
1309	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2466	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2467	#endif
1310		2468
1311	call_pending (EV_A);	2469	EV_INVOKE_PENDING;
1312
1313	if (expect_false (loop_done))
1314	break;
1315	}	2470	}
		2471	while (expect_true (
		2472	activecnt
		2473	&& !loop_done
		2474	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
		2475	));
1316		2476
1317	if (loop_done != 2)	2477	if (loop_done == EVBREAK_ONE)
1318	loop_done = 0;	2478	loop_done = EVBREAK_CANCEL;
1319	}
1320		2479
		2480	#if EV_FEATURE_API
		2481	--loop_depth;
		2482	#endif
		2483	}
		2484
1321	void	2485	void
1322	ev_unloop (EV_P_ int how)	2486	ev_break (EV_P_ int how)
1323	{	2487	{
1324	loop_done = how;	2488	loop_done = how;
1325	}	2489	}
1326		2490
		2491	void
		2492	ev_ref (EV_P)
		2493	{
		2494	++activecnt;
		2495	}
		2496
		2497	void
		2498	ev_unref (EV_P)
		2499	{
		2500	--activecnt;
		2501	}
		2502
		2503	void
		2504	ev_now_update (EV_P)
		2505	{
		2506	time_update (EV_A_ 1e100);
		2507	}
		2508
		2509	void
		2510	ev_suspend (EV_P)
		2511	{
		2512	ev_now_update (EV_A);
		2513	}
		2514
		2515	void
		2516	ev_resume (EV_P)
		2517	{
		2518	ev_tstamp mn_prev = mn_now;
		2519
		2520	ev_now_update (EV_A);
		2521	timers_reschedule (EV_A_ mn_now - mn_prev);
		2522	#if EV_PERIODIC_ENABLE
		2523	/* TODO: really do this? */
		2524	periodics_reschedule (EV_A);
		2525	#endif
		2526	}
		2527
1327	/*****************************************************************************/	2528	/*****************************************************************************/
		2529	/* singly-linked list management, used when the expected list length is short */
1328		2530
1329	inline void	2531	inline_size void
1330	wlist_add (WL *head, WL elem)	2532	wlist_add (WL *head, WL elem)
1331	{	2533	{
1332	elem->next = *head;	2534	elem->next = *head;
1333	*head = elem;	2535	*head = elem;
1334	}	2536	}
1335		2537
1336	inline void	2538	inline_size void
1337	wlist_del (WL *head, WL elem)	2539	wlist_del (WL *head, WL elem)
1338	{	2540	{
1339	while (*head)	2541	while (*head)
1340	{	2542	{
1341	if (*head == elem)	2543	if (expect_true (*head == elem))
1342	{	2544	{
1343	*head = elem->next;	2545	*head = elem->next;
1344	return;	2546	break;
1345	}	2547	}
1346		2548
1347	head = &(*head)->next;	2549	head = &(*head)->next;
1348	}	2550	}
1349	}	2551	}
1350		2552
		2553	/* internal, faster, version of ev_clear_pending */
1351	inline void	2554	inline_speed void
1352	ev_clear_pending (EV_P_ W w)	2555	clear_pending (EV_P_ W w)
1353	{	2556	{
1354	if (w->pending)	2557	if (w->pending)
1355	{	2558	{
1356	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2559	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1357	w->pending = 0;	2560	w->pending = 0;
1358	}	2561	}
1359	}	2562	}
1360		2563
		2564	int
		2565	ev_clear_pending (EV_P_ void *w)
		2566	{
		2567	W w_ = (W)w;
		2568	int pending = w_->pending;
		2569
		2570	if (expect_true (pending))
		2571	{
		2572	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2573	p->w = (W)&pending_w;
		2574	w_->pending = 0;
		2575	return p->events;
		2576	}
		2577	else
		2578	return 0;
		2579	}
		2580
1361	inline void	2581	inline_size void
		2582	pri_adjust (EV_P_ W w)
		2583	{
		2584	int pri = ev_priority (w);
		2585	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2586	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2587	ev_set_priority (w, pri);
		2588	}
		2589
		2590	inline_speed void
1362	ev_start (EV_P_ W w, int active)	2591	ev_start (EV_P_ W w, int active)
1363	{	2592	{
1364	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2593	pri_adjust (EV_A_ w);
1365	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1366
1367	w->active = active;	2594	w->active = active;
1368	ev_ref (EV_A);	2595	ev_ref (EV_A);
1369	}	2596	}
1370		2597
1371	inline void	2598	inline_size void
1372	ev_stop (EV_P_ W w)	2599	ev_stop (EV_P_ W w)
1373	{	2600	{
1374	ev_unref (EV_A);	2601	ev_unref (EV_A);
1375	w->active = 0;	2602	w->active = 0;
1376	}	2603	}
1377		2604
1378	/*****************************************************************************/	2605	/*****************************************************************************/
1379		2606
1380	void	2607	void noinline
1381	ev_io_start (EV_P_ struct ev_io *w)	2608	ev_io_start (EV_P_ ev_io *w)
1382	{	2609	{
1383	int fd = w->fd;	2610	int fd = w->fd;
1384		2611
1385	if (expect_false (ev_is_active (w)))	2612	if (expect_false (ev_is_active (w)))
1386	return;	2613	return;
1387		2614
1388	assert (("ev_io_start called with negative fd", fd >= 0));	2615	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2616	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		2617
		2618	EV_FREQUENT_CHECK;
1389		2619
1390	ev_start (EV_A_ (W)w, 1);	2620	ev_start (EV_A_ (W)w, 1);
1391	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2621	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1392	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2622	wlist_add (&anfds[fd].head, (WL)w);
1393		2623
1394	fd_change (EV_A_ fd);	2624	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1395	}	2625	w->events &= ~EV__IOFDSET;
1396		2626
1397	void	2627	EV_FREQUENT_CHECK;
		2628	}
		2629
		2630	void noinline
1398	ev_io_stop (EV_P_ struct ev_io *w)	2631	ev_io_stop (EV_P_ ev_io *w)
1399	{	2632	{
1400	ev_clear_pending (EV_A_ (W)w);	2633	clear_pending (EV_A_ (W)w);
1401	if (expect_false (!ev_is_active (w)))	2634	if (expect_false (!ev_is_active (w)))
1402	return;	2635	return;
1403		2636
1404	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2637	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1405		2638
		2639	EV_FREQUENT_CHECK;
		2640
1406	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2641	wlist_del (&anfds[w->fd].head, (WL)w);
1407	ev_stop (EV_A_ (W)w);	2642	ev_stop (EV_A_ (W)w);
1408		2643
1409	fd_change (EV_A_ w->fd);	2644	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1410	}
1411		2645
1412	void	2646	EV_FREQUENT_CHECK;
		2647	}
		2648
		2649	void noinline
1413	ev_timer_start (EV_P_ struct ev_timer *w)	2650	ev_timer_start (EV_P_ ev_timer *w)
1414	{	2651	{
1415	if (expect_false (ev_is_active (w)))	2652	if (expect_false (ev_is_active (w)))
1416	return;	2653	return;
1417		2654
1418	((WT)w)->at += mn_now;	2655	ev_at (w) += mn_now;
1419		2656
1420	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2657	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1421		2658
		2659	EV_FREQUENT_CHECK;
		2660
		2661	++timercnt;
1422	ev_start (EV_A_ (W)w, ++timercnt);	2662	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1423	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2663	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1424	timers [timercnt - 1] = w;	2664	ANHE_w (timers [ev_active (w)]) = (WT)w;
1425	upheap ((WT *)timers, timercnt - 1);	2665	ANHE_at_cache (timers [ev_active (w)]);
		2666	upheap (timers, ev_active (w));
1426		2667
		2668	EV_FREQUENT_CHECK;
		2669
1427	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2670	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1428	}	2671	}
1429		2672
1430	void	2673	void noinline
1431	ev_timer_stop (EV_P_ struct ev_timer *w)	2674	ev_timer_stop (EV_P_ ev_timer *w)
1432	{	2675	{
1433	ev_clear_pending (EV_A_ (W)w);	2676	clear_pending (EV_A_ (W)w);
1434	if (expect_false (!ev_is_active (w)))	2677	if (expect_false (!ev_is_active (w)))
1435	return;	2678	return;
1436		2679
		2680	EV_FREQUENT_CHECK;
		2681
		2682	{
		2683	int active = ev_active (w);
		2684
1437	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2685	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1438		2686
		2687	--timercnt;
		2688
1439	if (expect_true (((W)w)->active < timercnt--))	2689	if (expect_true (active < timercnt + HEAP0))
1440	{	2690	{
1441	timers [((W)w)->active - 1] = timers [timercnt];	2691	timers [active] = timers [timercnt + HEAP0];
1442	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2692	adjustheap (timers, timercnt, active);
1443	}	2693	}
		2694	}
1444		2695
1445	((WT)w)->at -= mn_now;	2696	ev_at (w) -= mn_now;
1446		2697
1447	ev_stop (EV_A_ (W)w);	2698	ev_stop (EV_A_ (W)w);
1448	}
1449		2699
1450	void	2700	EV_FREQUENT_CHECK;
		2701	}
		2702
		2703	void noinline
1451	ev_timer_again (EV_P_ struct ev_timer *w)	2704	ev_timer_again (EV_P_ ev_timer *w)
1452	{	2705	{
		2706	EV_FREQUENT_CHECK;
		2707
1453	if (ev_is_active (w))	2708	if (ev_is_active (w))
1454	{	2709	{
1455	if (w->repeat)	2710	if (w->repeat)
1456	{	2711	{
1457	((WT)w)->at = mn_now + w->repeat;	2712	ev_at (w) = mn_now + w->repeat;
		2713	ANHE_at_cache (timers [ev_active (w)]);
1458	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2714	adjustheap (timers, timercnt, ev_active (w));
1459	}	2715	}
1460	else	2716	else
1461	ev_timer_stop (EV_A_ w);	2717	ev_timer_stop (EV_A_ w);
1462	}	2718	}
1463	else if (w->repeat)	2719	else if (w->repeat)
1464	{	2720	{
1465	w->at = w->repeat;	2721	ev_at (w) = w->repeat;
1466	ev_timer_start (EV_A_ w);	2722	ev_timer_start (EV_A_ w);
1467	}	2723	}
1468	}
1469		2724
		2725	EV_FREQUENT_CHECK;
		2726	}
		2727
		2728	ev_tstamp
		2729	ev_timer_remaining (EV_P_ ev_timer *w)
		2730	{
		2731	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2732	}
		2733
1470	#if EV_PERIODICS	2734	#if EV_PERIODIC_ENABLE
1471	void	2735	void noinline
1472	ev_periodic_start (EV_P_ struct ev_periodic *w)	2736	ev_periodic_start (EV_P_ ev_periodic *w)
1473	{	2737	{
1474	if (expect_false (ev_is_active (w)))	2738	if (expect_false (ev_is_active (w)))
1475	return;	2739	return;
1476		2740
1477	if (w->reschedule_cb)	2741	if (w->reschedule_cb)
1478	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2742	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1479	else if (w->interval)	2743	else if (w->interval)
1480	{	2744	{
1481	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2745	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1482	/* this formula differs from the one in periodic_reify because we do not always round up */	2746	/* this formula differs from the one in periodic_reify because we do not always round up */
1483	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2747	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1484	}	2748	}
		2749	else
		2750	ev_at (w) = w->offset;
1485		2751
		2752	EV_FREQUENT_CHECK;
		2753
		2754	++periodiccnt;
1486	ev_start (EV_A_ (W)w, ++periodiccnt);	2755	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1487	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2756	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1488	periodics [periodiccnt - 1] = w;	2757	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1489	upheap ((WT *)periodics, periodiccnt - 1);	2758	ANHE_at_cache (periodics [ev_active (w)]);
		2759	upheap (periodics, ev_active (w));
1490		2760
		2761	EV_FREQUENT_CHECK;
		2762
1491	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2763	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1492	}	2764	}
1493		2765
1494	void	2766	void noinline
1495	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2767	ev_periodic_stop (EV_P_ ev_periodic *w)
1496	{	2768	{
1497	ev_clear_pending (EV_A_ (W)w);	2769	clear_pending (EV_A_ (W)w);
1498	if (expect_false (!ev_is_active (w)))	2770	if (expect_false (!ev_is_active (w)))
1499	return;	2771	return;
1500		2772
		2773	EV_FREQUENT_CHECK;
		2774
		2775	{
		2776	int active = ev_active (w);
		2777
1501	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2778	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1502		2779
		2780	--periodiccnt;
		2781
1503	if (expect_true (((W)w)->active < periodiccnt--))	2782	if (expect_true (active < periodiccnt + HEAP0))
1504	{	2783	{
1505	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2784	periodics [active] = periodics [periodiccnt + HEAP0];
1506	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2785	adjustheap (periodics, periodiccnt, active);
1507	}	2786	}
		2787	}
1508		2788
1509	ev_stop (EV_A_ (W)w);	2789	ev_stop (EV_A_ (W)w);
1510	}
1511		2790
1512	void	2791	EV_FREQUENT_CHECK;
		2792	}
		2793
		2794	void noinline
1513	ev_periodic_again (EV_P_ struct ev_periodic *w)	2795	ev_periodic_again (EV_P_ ev_periodic *w)
1514	{	2796	{
1515	/* TODO: use adjustheap and recalculation */	2797	/* TODO: use adjustheap and recalculation */
1516	ev_periodic_stop (EV_A_ w);	2798	ev_periodic_stop (EV_A_ w);
1517	ev_periodic_start (EV_A_ w);	2799	ev_periodic_start (EV_A_ w);
1518	}	2800	}
1519	#endif	2801	#endif
1520		2802
1521	void	2803	#ifndef SA_RESTART
1522	ev_idle_start (EV_P_ struct ev_idle *w)	2804	# define SA_RESTART 0
		2805	#endif
		2806
		2807	#if EV_SIGNAL_ENABLE
		2808
		2809	void noinline
		2810	ev_signal_start (EV_P_ ev_signal *w)
1523	{	2811	{
1524	if (expect_false (ev_is_active (w)))	2812	if (expect_false (ev_is_active (w)))
1525	return;	2813	return;
1526		2814
		2815	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
		2816
		2817	#if EV_MULTIPLICITY
		2818	assert (("libev: a signal must not be attached to two different loops",
		2819	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
		2820
		2821	signals [w->signum - 1].loop = EV_A;
		2822	#endif
		2823
		2824	EV_FREQUENT_CHECK;
		2825
		2826	#if EV_USE_SIGNALFD
		2827	if (sigfd == -2)
		2828	{
		2829	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
		2830	if (sigfd < 0 && errno == EINVAL)
		2831	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
		2832
		2833	if (sigfd >= 0)
		2834	{
		2835	fd_intern (sigfd); /* doing it twice will not hurt */
		2836
		2837	sigemptyset (&sigfd_set);
		2838
		2839	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2840	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2841	ev_io_start (EV_A_ &sigfd_w);
		2842	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2843	}
		2844	}
		2845
		2846	if (sigfd >= 0)
		2847	{
		2848	/* TODO: check .head */
		2849	sigaddset (&sigfd_set, w->signum);
		2850	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2851
		2852	signalfd (sigfd, &sigfd_set, 0);
		2853	}
		2854	#endif
		2855
1527	ev_start (EV_A_ (W)w, ++idlecnt);	2856	ev_start (EV_A_ (W)w, 1);
1528	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);	2857	wlist_add (&signals [w->signum - 1].head, (WL)w);
1529	idles [idlecnt - 1] = w;
1530	}
1531		2858
1532	void	2859	if (!((WL)w)->next)
1533	ev_idle_stop (EV_P_ struct ev_idle *w)	2860	# if EV_USE_SIGNALFD
		2861	if (sigfd < 0) /*TODO*/
		2862	# endif
		2863	{
		2864	# ifdef _WIN32
		2865	evpipe_init (EV_A);
		2866
		2867	signal (w->signum, ev_sighandler);
		2868	# else
		2869	struct sigaction sa;
		2870
		2871	evpipe_init (EV_A);
		2872
		2873	sa.sa_handler = ev_sighandler;
		2874	sigfillset (&sa.sa_mask);
		2875	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2876	sigaction (w->signum, &sa, 0);
		2877
		2878	sigemptyset (&sa.sa_mask);
		2879	sigaddset (&sa.sa_mask, w->signum);
		2880	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		2881	#endif
		2882	}
		2883
		2884	EV_FREQUENT_CHECK;
		2885	}
		2886
		2887	void noinline
		2888	ev_signal_stop (EV_P_ ev_signal *w)
1534	{	2889	{
1535	ev_clear_pending (EV_A_ (W)w);	2890	clear_pending (EV_A_ (W)w);
1536	if (expect_false (!ev_is_active (w)))	2891	if (expect_false (!ev_is_active (w)))
1537	return;	2892	return;
1538		2893
1539	idles [((W)w)->active - 1] = idles [--idlecnt];	2894	EV_FREQUENT_CHECK;
		2895
		2896	wlist_del (&signals [w->signum - 1].head, (WL)w);
1540	ev_stop (EV_A_ (W)w);	2897	ev_stop (EV_A_ (W)w);
1541	}
1542		2898
		2899	if (!signals [w->signum - 1].head)
		2900	{
		2901	#if EV_MULTIPLICITY
		2902	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2903	#endif
		2904	#if EV_USE_SIGNALFD
		2905	if (sigfd >= 0)
		2906	{
		2907	sigset_t ss;
		2908
		2909	sigemptyset (&ss);
		2910	sigaddset (&ss, w->signum);
		2911	sigdelset (&sigfd_set, w->signum);
		2912
		2913	signalfd (sigfd, &sigfd_set, 0);
		2914	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2915	}
		2916	else
		2917	#endif
		2918	signal (w->signum, SIG_DFL);
		2919	}
		2920
		2921	EV_FREQUENT_CHECK;
		2922	}
		2923
		2924	#endif
		2925
		2926	#if EV_CHILD_ENABLE
		2927
1543	void	2928	void
1544	ev_prepare_start (EV_P_ struct ev_prepare *w)	2929	ev_child_start (EV_P_ ev_child *w)
1545	{	2930	{
		2931	#if EV_MULTIPLICITY
		2932	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2933	#endif
1546	if (expect_false (ev_is_active (w)))	2934	if (expect_false (ev_is_active (w)))
1547	return;	2935	return;
1548		2936
		2937	EV_FREQUENT_CHECK;
		2938
1549	ev_start (EV_A_ (W)w, ++preparecnt);	2939	ev_start (EV_A_ (W)w, 1);
1550	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);	2940	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1551	prepares [preparecnt - 1] = w;
1552	}
1553		2941
		2942	EV_FREQUENT_CHECK;
		2943	}
		2944
1554	void	2945	void
1555	ev_prepare_stop (EV_P_ struct ev_prepare *w)	2946	ev_child_stop (EV_P_ ev_child *w)
1556	{	2947	{
1557	ev_clear_pending (EV_A_ (W)w);	2948	clear_pending (EV_A_ (W)w);
1558	if (expect_false (!ev_is_active (w)))	2949	if (expect_false (!ev_is_active (w)))
1559	return;	2950	return;
1560		2951
1561	prepares [((W)w)->active - 1] = prepares [--preparecnt];	2952	EV_FREQUENT_CHECK;
		2953
		2954	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1562	ev_stop (EV_A_ (W)w);	2955	ev_stop (EV_A_ (W)w);
1563	}
1564		2956
		2957	EV_FREQUENT_CHECK;
		2958	}
		2959
		2960	#endif
		2961
		2962	#if EV_STAT_ENABLE
		2963
		2964	# ifdef _WIN32
		2965	# undef lstat
		2966	# define lstat(a,b) _stati64 (a,b)
		2967	# endif
		2968
		2969	#define DEF_STAT_INTERVAL 5.0074891
		2970	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
		2971	#define MIN_STAT_INTERVAL 0.1074891
		2972
		2973	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2974
		2975	#if EV_USE_INOTIFY
		2976
		2977	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2978	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
		2979
		2980	static void noinline
		2981	infy_add (EV_P_ ev_stat *w)
		2982	{
		2983	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);
		2984
		2985	if (w->wd >= 0)
		2986	{
		2987	struct statfs sfs;
		2988
		2989	/* now local changes will be tracked by inotify, but remote changes won't */
		2990	/* unless the filesystem is known to be local, we therefore still poll */
		2991	/* also do poll on <2.6.25, but with normal frequency */
		2992
		2993	if (!fs_2625)
		2994	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2995	else if (!statfs (w->path, &sfs)
		2996	&& (sfs.f_type == 0x1373 /* devfs */
		2997	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2998	|| sfs.f_type == 0x3153464a /* jfs */
		2999	|| sfs.f_type == 0x52654973 /* reiser3 */
		3000	|| sfs.f_type == 0x01021994 /* tempfs */
		3001	|| sfs.f_type == 0x58465342 /* xfs */))
		3002	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		3003	else
		3004	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
		3005	}
		3006	else
		3007	{
		3008	/* can't use inotify, continue to stat */
		3009	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3010
		3011	/* if path is not there, monitor some parent directory for speedup hints */
		3012	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		3013	/* but an efficiency issue only */
		3014	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		3015	{
		3016	char path [4096];
		3017	strcpy (path, w->path);
		3018
		3019	do
		3020	{
		3021	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		3022	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		3023
		3024	char *pend = strrchr (path, '/');
		3025
		3026	if (!pend || pend == path)
		3027	break;
		3028
		3029	*pend = 0;
		3030	w->wd = inotify_add_watch (fs_fd, path, mask);
		3031	}
		3032	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		3033	}
		3034	}
		3035
		3036	if (w->wd >= 0)
		3037	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3038
		3039	/* now re-arm timer, if required */
		3040	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3041	ev_timer_again (EV_A_ &w->timer);
		3042	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3043	}
		3044
		3045	static void noinline
		3046	infy_del (EV_P_ ev_stat *w)
		3047	{
		3048	int slot;
		3049	int wd = w->wd;
		3050
		3051	if (wd < 0)
		3052	return;
		3053
		3054	w->wd = -2;
		3055	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
		3056	wlist_del (&fs_hash [slot].head, (WL)w);
		3057
		3058	/* remove this watcher, if others are watching it, they will rearm */
		3059	inotify_rm_watch (fs_fd, wd);
		3060	}
		3061
		3062	static void noinline
		3063	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		3064	{
		3065	if (slot < 0)
		3066	/* overflow, need to check for all hash slots */
		3067	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
		3068	infy_wd (EV_A_ slot, wd, ev);
		3069	else
		3070	{
		3071	WL w_;
		3072
		3073	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
		3074	{
		3075	ev_stat *w = (ev_stat *)w_;
		3076	w_ = w_->next; /* lets us remove this watcher and all before it */
		3077
		3078	if (w->wd == wd || wd == -1)
		3079	{
		3080	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		3081	{
		3082	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3083	w->wd = -1;
		3084	infy_add (EV_A_ w); /* re-add, no matter what */
		3085	}
		3086
		3087	stat_timer_cb (EV_A_ &w->timer, 0);
		3088	}
		3089	}
		3090	}
		3091	}
		3092
		3093	static void
		3094	infy_cb (EV_P_ ev_io *w, int revents)
		3095	{
		3096	char buf [EV_INOTIFY_BUFSIZE];
		3097	int ofs;
		3098	int len = read (fs_fd, buf, sizeof (buf));
		3099
		3100	for (ofs = 0; ofs < len; )
		3101	{
		3102	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
		3103	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3104	ofs += sizeof (struct inotify_event) + ev->len;
		3105	}
		3106	}
		3107
		3108	inline_size void
		3109	ev_check_2625 (EV_P)
		3110	{
		3111	/* kernels < 2.6.25 are borked
		3112	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		3113	*/
		3114	if (ev_linux_version () < 0x020619)
		3115	return;
		3116
		3117	fs_2625 = 1;
		3118	}
		3119
		3120	inline_size int
		3121	infy_newfd (void)
		3122	{
		3123	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3124	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3125	if (fd >= 0)
		3126	return fd;
		3127	#endif
		3128	return inotify_init ();
		3129	}
		3130
		3131	inline_size void
		3132	infy_init (EV_P)
		3133	{
		3134	if (fs_fd != -2)
		3135	return;
		3136
		3137	fs_fd = -1;
		3138
		3139	ev_check_2625 (EV_A);
		3140
		3141	fs_fd = infy_newfd ();
		3142
		3143	if (fs_fd >= 0)
		3144	{
		3145	fd_intern (fs_fd);
		3146	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		3147	ev_set_priority (&fs_w, EV_MAXPRI);
		3148	ev_io_start (EV_A_ &fs_w);
		3149	ev_unref (EV_A);
		3150	}
		3151	}
		3152
		3153	inline_size void
		3154	infy_fork (EV_P)
		3155	{
		3156	int slot;
		3157
		3158	if (fs_fd < 0)
		3159	return;
		3160
		3161	ev_ref (EV_A);
		3162	ev_io_stop (EV_A_ &fs_w);
		3163	close (fs_fd);
		3164	fs_fd = infy_newfd ();
		3165
		3166	if (fs_fd >= 0)
		3167	{
		3168	fd_intern (fs_fd);
		3169	ev_io_set (&fs_w, fs_fd, EV_READ);
		3170	ev_io_start (EV_A_ &fs_w);
		3171	ev_unref (EV_A);
		3172	}
		3173
		3174	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
		3175	{
		3176	WL w_ = fs_hash [slot].head;
		3177	fs_hash [slot].head = 0;
		3178
		3179	while (w_)
		3180	{
		3181	ev_stat *w = (ev_stat *)w_;
		3182	w_ = w_->next; /* lets us add this watcher */
		3183
		3184	w->wd = -1;
		3185
		3186	if (fs_fd >= 0)
		3187	infy_add (EV_A_ w); /* re-add, no matter what */
		3188	else
		3189	{
		3190	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3191	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3192	ev_timer_again (EV_A_ &w->timer);
		3193	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3194	}
		3195	}
		3196	}
		3197	}
		3198
		3199	#endif
		3200
		3201	#ifdef _WIN32
		3202	# define EV_LSTAT(p,b) _stati64 (p, b)
		3203	#else
		3204	# define EV_LSTAT(p,b) lstat (p, b)
		3205	#endif
		3206
1565	void	3207	void
1566	ev_check_start (EV_P_ struct ev_check *w)	3208	ev_stat_stat (EV_P_ ev_stat *w)
		3209	{
		3210	if (lstat (w->path, &w->attr) < 0)
		3211	w->attr.st_nlink = 0;
		3212	else if (!w->attr.st_nlink)
		3213	w->attr.st_nlink = 1;
		3214	}
		3215
		3216	static void noinline
		3217	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		3218	{
		3219	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		3220
		3221	ev_statdata prev = w->attr;
		3222	ev_stat_stat (EV_A_ w);
		3223
		3224	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		3225	if (
		3226	prev.st_dev != w->attr.st_dev
		3227	|| prev.st_ino != w->attr.st_ino
		3228	|| prev.st_mode != w->attr.st_mode
		3229	|| prev.st_nlink != w->attr.st_nlink
		3230	|| prev.st_uid != w->attr.st_uid
		3231	|| prev.st_gid != w->attr.st_gid
		3232	|| prev.st_rdev != w->attr.st_rdev
		3233	|| prev.st_size != w->attr.st_size
		3234	|| prev.st_atime != w->attr.st_atime
		3235	|| prev.st_mtime != w->attr.st_mtime
		3236	|| prev.st_ctime != w->attr.st_ctime
		3237	) {
		3238	/* we only update w->prev on actual differences */
		3239	/* in case we test more often than invoke the callback, */
		3240	/* to ensure that prev is always different to attr */
		3241	w->prev = prev;
		3242
		3243	#if EV_USE_INOTIFY
		3244	if (fs_fd >= 0)
		3245	{
		3246	infy_del (EV_A_ w);
		3247	infy_add (EV_A_ w);
		3248	ev_stat_stat (EV_A_ w); /* avoid race... */
		3249	}
		3250	#endif
		3251
		3252	ev_feed_event (EV_A_ w, EV_STAT);
		3253	}
		3254	}
		3255
		3256	void
		3257	ev_stat_start (EV_P_ ev_stat *w)
1567	{	3258	{
1568	if (expect_false (ev_is_active (w)))	3259	if (expect_false (ev_is_active (w)))
1569	return;	3260	return;
1570		3261
		3262	ev_stat_stat (EV_A_ w);
		3263
		3264	if (w->interval < MIN_STAT_INTERVAL && w->interval)
		3265	w->interval = MIN_STAT_INTERVAL;
		3266
		3267	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
		3268	ev_set_priority (&w->timer, ev_priority (w));
		3269
		3270	#if EV_USE_INOTIFY
		3271	infy_init (EV_A);
		3272
		3273	if (fs_fd >= 0)
		3274	infy_add (EV_A_ w);
		3275	else
		3276	#endif
		3277	{
		3278	ev_timer_again (EV_A_ &w->timer);
		3279	ev_unref (EV_A);
		3280	}
		3281
1571	ev_start (EV_A_ (W)w, ++checkcnt);	3282	ev_start (EV_A_ (W)w, 1);
1572	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1573	checks [checkcnt - 1] = w;
1574	}
1575		3283
		3284	EV_FREQUENT_CHECK;
		3285	}
		3286
1576	void	3287	void
1577	ev_check_stop (EV_P_ struct ev_check *w)	3288	ev_stat_stop (EV_P_ ev_stat *w)
1578	{	3289	{
1579	ev_clear_pending (EV_A_ (W)w);	3290	clear_pending (EV_A_ (W)w);
1580	if (expect_false (!ev_is_active (w)))	3291	if (expect_false (!ev_is_active (w)))
1581	return;	3292	return;
1582		3293
1583	checks [((W)w)->active - 1] = checks [--checkcnt];	3294	EV_FREQUENT_CHECK;
		3295
		3296	#if EV_USE_INOTIFY
		3297	infy_del (EV_A_ w);
		3298	#endif
		3299
		3300	if (ev_is_active (&w->timer))
		3301	{
		3302	ev_ref (EV_A);
		3303	ev_timer_stop (EV_A_ &w->timer);
		3304	}
		3305
1584	ev_stop (EV_A_ (W)w);	3306	ev_stop (EV_A_ (W)w);
1585	}
1586		3307
1587	#ifndef SA_RESTART	3308	EV_FREQUENT_CHECK;
1588	# define SA_RESTART 0	3309	}
1589	#endif	3310	#endif
1590		3311
		3312	#if EV_IDLE_ENABLE
1591	void	3313	void
1592	ev_signal_start (EV_P_ struct ev_signal *w)	3314	ev_idle_start (EV_P_ ev_idle *w)
1593	{	3315	{
1594	#if EV_MULTIPLICITY
1595	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1596	#endif
1597	if (expect_false (ev_is_active (w)))	3316	if (expect_false (ev_is_active (w)))
1598	return;	3317	return;
1599		3318
1600	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	3319	pri_adjust (EV_A_ (W)w);
1601		3320
		3321	EV_FREQUENT_CHECK;
		3322
		3323	{
		3324	int active = ++idlecnt [ABSPRI (w)];
		3325
		3326	++idleall;
1602	ev_start (EV_A_ (W)w, 1);	3327	ev_start (EV_A_ (W)w, active);
1603	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1604	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1605		3328
1606	if (!((WL)w)->next)	3329	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1607	{	3330	idles [ABSPRI (w)][active - 1] = w;
1608	#if _WIN32
1609	signal (w->signum, sighandler);
1610	#else
1611	struct sigaction sa;
1612	sa.sa_handler = sighandler;
1613	sigfillset (&sa.sa_mask);
1614	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1615	sigaction (w->signum, &sa, 0);
1616	#endif
1617	}	3331	}
1618	}
1619		3332
		3333	EV_FREQUENT_CHECK;
		3334	}
		3335
1620	void	3336	void
1621	ev_signal_stop (EV_P_ struct ev_signal *w)	3337	ev_idle_stop (EV_P_ ev_idle *w)
1622	{	3338	{
1623	ev_clear_pending (EV_A_ (W)w);	3339	clear_pending (EV_A_ (W)w);
1624	if (expect_false (!ev_is_active (w)))	3340	if (expect_false (!ev_is_active (w)))
1625	return;	3341	return;
1626		3342
1627	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	3343	EV_FREQUENT_CHECK;
		3344
		3345	{
		3346	int active = ev_active (w);
		3347
		3348	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		3349	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		3350
1628	ev_stop (EV_A_ (W)w);	3351	ev_stop (EV_A_ (W)w);
		3352	--idleall;
		3353	}
1629		3354
1630	if (!signals [w->signum - 1].head)	3355	EV_FREQUENT_CHECK;
1631	signal (w->signum, SIG_DFL);
1632	}	3356	}
1633
1634	void
1635	ev_child_start (EV_P_ struct ev_child *w)
1636	{
1637	#if EV_MULTIPLICITY
1638	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1639	#endif	3357	#endif
		3358
		3359	#if EV_PREPARE_ENABLE
		3360	void
		3361	ev_prepare_start (EV_P_ ev_prepare *w)
		3362	{
1640	if (expect_false (ev_is_active (w)))	3363	if (expect_false (ev_is_active (w)))
1641	return;	3364	return;
1642		3365
		3366	EV_FREQUENT_CHECK;
		3367
1643	ev_start (EV_A_ (W)w, 1);	3368	ev_start (EV_A_ (W)w, ++preparecnt);
1644	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	3369	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1645	}	3370	prepares [preparecnt - 1] = w;
1646		3371
		3372	EV_FREQUENT_CHECK;
		3373	}
		3374
1647	void	3375	void
1648	ev_child_stop (EV_P_ struct ev_child *w)	3376	ev_prepare_stop (EV_P_ ev_prepare *w)
1649	{	3377	{
1650	ev_clear_pending (EV_A_ (W)w);	3378	clear_pending (EV_A_ (W)w);
1651	if (expect_false (!ev_is_active (w)))	3379	if (expect_false (!ev_is_active (w)))
1652	return;	3380	return;
1653		3381
1654	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	3382	EV_FREQUENT_CHECK;
		3383
		3384	{
		3385	int active = ev_active (w);
		3386
		3387	prepares [active - 1] = prepares [--preparecnt];
		3388	ev_active (prepares [active - 1]) = active;
		3389	}
		3390
1655	ev_stop (EV_A_ (W)w);	3391	ev_stop (EV_A_ (W)w);
		3392
		3393	EV_FREQUENT_CHECK;
1656	}	3394	}
		3395	#endif
		3396
		3397	#if EV_CHECK_ENABLE
		3398	void
		3399	ev_check_start (EV_P_ ev_check *w)
		3400	{
		3401	if (expect_false (ev_is_active (w)))
		3402	return;
		3403
		3404	EV_FREQUENT_CHECK;
		3405
		3406	ev_start (EV_A_ (W)w, ++checkcnt);
		3407	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		3408	checks [checkcnt - 1] = w;
		3409
		3410	EV_FREQUENT_CHECK;
		3411	}
		3412
		3413	void
		3414	ev_check_stop (EV_P_ ev_check *w)
		3415	{
		3416	clear_pending (EV_A_ (W)w);
		3417	if (expect_false (!ev_is_active (w)))
		3418	return;
		3419
		3420	EV_FREQUENT_CHECK;
		3421
		3422	{
		3423	int active = ev_active (w);
		3424
		3425	checks [active - 1] = checks [--checkcnt];
		3426	ev_active (checks [active - 1]) = active;
		3427	}
		3428
		3429	ev_stop (EV_A_ (W)w);
		3430
		3431	EV_FREQUENT_CHECK;
		3432	}
		3433	#endif
		3434
		3435	#if EV_EMBED_ENABLE
		3436	void noinline
		3437	ev_embed_sweep (EV_P_ ev_embed *w)
		3438	{
		3439	ev_run (w->other, EVRUN_NOWAIT);
		3440	}
		3441
		3442	static void
		3443	embed_io_cb (EV_P_ ev_io *io, int revents)
		3444	{
		3445	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		3446
		3447	if (ev_cb (w))
		3448	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		3449	else
		3450	ev_run (w->other, EVRUN_NOWAIT);
		3451	}
		3452
		3453	static void
		3454	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		3455	{
		3456	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		3457
		3458	{
		3459	EV_P = w->other;
		3460
		3461	while (fdchangecnt)
		3462	{
		3463	fd_reify (EV_A);
		3464	ev_run (EV_A_ EVRUN_NOWAIT);
		3465	}
		3466	}
		3467	}
		3468
		3469	static void
		3470	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3471	{
		3472	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3473
		3474	ev_embed_stop (EV_A_ w);
		3475
		3476	{
		3477	EV_P = w->other;
		3478
		3479	ev_loop_fork (EV_A);
		3480	ev_run (EV_A_ EVRUN_NOWAIT);
		3481	}
		3482
		3483	ev_embed_start (EV_A_ w);
		3484	}
		3485
		3486	#if 0
		3487	static void
		3488	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		3489	{
		3490	ev_idle_stop (EV_A_ idle);
		3491	}
		3492	#endif
		3493
		3494	void
		3495	ev_embed_start (EV_P_ ev_embed *w)
		3496	{
		3497	if (expect_false (ev_is_active (w)))
		3498	return;
		3499
		3500	{
		3501	EV_P = w->other;
		3502	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		3503	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		3504	}
		3505
		3506	EV_FREQUENT_CHECK;
		3507
		3508	ev_set_priority (&w->io, ev_priority (w));
		3509	ev_io_start (EV_A_ &w->io);
		3510
		3511	ev_prepare_init (&w->prepare, embed_prepare_cb);
		3512	ev_set_priority (&w->prepare, EV_MINPRI);
		3513	ev_prepare_start (EV_A_ &w->prepare);
		3514
		3515	ev_fork_init (&w->fork, embed_fork_cb);
		3516	ev_fork_start (EV_A_ &w->fork);
		3517
		3518	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		3519
		3520	ev_start (EV_A_ (W)w, 1);
		3521
		3522	EV_FREQUENT_CHECK;
		3523	}
		3524
		3525	void
		3526	ev_embed_stop (EV_P_ ev_embed *w)
		3527	{
		3528	clear_pending (EV_A_ (W)w);
		3529	if (expect_false (!ev_is_active (w)))
		3530	return;
		3531
		3532	EV_FREQUENT_CHECK;
		3533
		3534	ev_io_stop (EV_A_ &w->io);
		3535	ev_prepare_stop (EV_A_ &w->prepare);
		3536	ev_fork_stop (EV_A_ &w->fork);
		3537
		3538	ev_stop (EV_A_ (W)w);
		3539
		3540	EV_FREQUENT_CHECK;
		3541	}
		3542	#endif
		3543
		3544	#if EV_FORK_ENABLE
		3545	void
		3546	ev_fork_start (EV_P_ ev_fork *w)
		3547	{
		3548	if (expect_false (ev_is_active (w)))
		3549	return;
		3550
		3551	EV_FREQUENT_CHECK;
		3552
		3553	ev_start (EV_A_ (W)w, ++forkcnt);
		3554	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		3555	forks [forkcnt - 1] = w;
		3556
		3557	EV_FREQUENT_CHECK;
		3558	}
		3559
		3560	void
		3561	ev_fork_stop (EV_P_ ev_fork *w)
		3562	{
		3563	clear_pending (EV_A_ (W)w);
		3564	if (expect_false (!ev_is_active (w)))
		3565	return;
		3566
		3567	EV_FREQUENT_CHECK;
		3568
		3569	{
		3570	int active = ev_active (w);
		3571
		3572	forks [active - 1] = forks [--forkcnt];
		3573	ev_active (forks [active - 1]) = active;
		3574	}
		3575
		3576	ev_stop (EV_A_ (W)w);
		3577
		3578	EV_FREQUENT_CHECK;
		3579	}
		3580	#endif
		3581
		3582	#if EV_ASYNC_ENABLE
		3583	void
		3584	ev_async_start (EV_P_ ev_async *w)
		3585	{
		3586	if (expect_false (ev_is_active (w)))
		3587	return;
		3588
		3589	w->sent = 0;
		3590
		3591	evpipe_init (EV_A);
		3592
		3593	EV_FREQUENT_CHECK;
		3594
		3595	ev_start (EV_A_ (W)w, ++asynccnt);
		3596	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		3597	asyncs [asynccnt - 1] = w;
		3598
		3599	EV_FREQUENT_CHECK;
		3600	}
		3601
		3602	void
		3603	ev_async_stop (EV_P_ ev_async *w)
		3604	{
		3605	clear_pending (EV_A_ (W)w);
		3606	if (expect_false (!ev_is_active (w)))
		3607	return;
		3608
		3609	EV_FREQUENT_CHECK;
		3610
		3611	{
		3612	int active = ev_active (w);
		3613
		3614	asyncs [active - 1] = asyncs [--asynccnt];
		3615	ev_active (asyncs [active - 1]) = active;
		3616	}
		3617
		3618	ev_stop (EV_A_ (W)w);
		3619
		3620	EV_FREQUENT_CHECK;
		3621	}
		3622
		3623	void
		3624	ev_async_send (EV_P_ ev_async *w)
		3625	{
		3626	w->sent = 1;
		3627	evpipe_write (EV_A_ &async_pending);
		3628	}
		3629	#endif
1657		3630
1658	/*****************************************************************************/	3631	/*****************************************************************************/
1659		3632
1660	struct ev_once	3633	struct ev_once
1661	{	3634	{
1662	struct ev_io io;	3635	ev_io io;
1663	struct ev_timer to;	3636	ev_timer to;
1664	void (*cb)(int revents, void *arg);	3637	void (*cb)(int revents, void *arg);
1665	void *arg;	3638	void *arg;
1666	};	3639	};
1667		3640
1668	static void	3641	static void
1669	once_cb (EV_P_ struct ev_once *once, int revents)	3642	once_cb (EV_P_ struct ev_once *once, int revents)
1670	{	3643	{
1671	void (*cb)(int revents, void *arg) = once->cb;	3644	void (*cb)(int revents, void *arg) = once->cb;
1672	void *arg = once->arg;	3645	void *arg = once->arg;
1673		3646
1674	ev_io_stop (EV_A_ &once->io);	3647	ev_io_stop (EV_A_ &once->io);
1675	ev_timer_stop (EV_A_ &once->to);	3648	ev_timer_stop (EV_A_ &once->to);
1676	ev_free (once);	3649	ev_free (once);
1677		3650
1678	cb (revents, arg);	3651	cb (revents, arg);
1679	}	3652	}
1680		3653
1681	static void	3654	static void
1682	once_cb_io (EV_P_ struct ev_io *w, int revents)	3655	once_cb_io (EV_P_ ev_io *w, int revents)
1683	{	3656	{
1684	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3657	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3658
		3659	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1685	}	3660	}
1686		3661
1687	static void	3662	static void
1688	once_cb_to (EV_P_ struct ev_timer *w, int revents)	3663	once_cb_to (EV_P_ ev_timer *w, int revents)
1689	{	3664	{
1690	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3665	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3666
		3667	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1691	}	3668	}
1692		3669
1693	void	3670	void
1694	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3671	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1695	{	3672	{
1696	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3673	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1697		3674
1698	if (expect_false (!once))	3675	if (expect_false (!once))
1699	{	3676	{
1700	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3677	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1701	return;	3678	return;
1702	}	3679	}
1703		3680
1704	once->cb = cb;	3681	once->cb = cb;
1705	once->arg = arg;	3682	once->arg = arg;
…		…
1717	ev_timer_set (&once->to, timeout, 0.);	3694	ev_timer_set (&once->to, timeout, 0.);
1718	ev_timer_start (EV_A_ &once->to);	3695	ev_timer_start (EV_A_ &once->to);
1719	}	3696	}
1720	}	3697	}
1721		3698
1722	#ifdef __cplusplus	3699	/*****************************************************************************/
1723	}	3700
		3701	#if EV_WALK_ENABLE
		3702	void
		3703	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3704	{
		3705	int i, j;
		3706	ev_watcher_list *wl, *wn;
		3707
		3708	if (types & (EV_IO | EV_EMBED))
		3709	for (i = 0; i < anfdmax; ++i)
		3710	for (wl = anfds [i].head; wl; )
		3711	{
		3712	wn = wl->next;
		3713
		3714	#if EV_EMBED_ENABLE
		3715	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3716	{
		3717	if (types & EV_EMBED)
		3718	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3719	}
		3720	else
		3721	#endif
		3722	#if EV_USE_INOTIFY
		3723	if (ev_cb ((ev_io *)wl) == infy_cb)
		3724	;
		3725	else
		3726	#endif
		3727	if ((ev_io *)wl != &pipe_w)
		3728	if (types & EV_IO)
		3729	cb (EV_A_ EV_IO, wl);
		3730
		3731	wl = wn;
		3732	}
		3733
		3734	if (types & (EV_TIMER | EV_STAT))
		3735	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3736	#if EV_STAT_ENABLE
		3737	/*TODO: timer is not always active*/
		3738	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3739	{
		3740	if (types & EV_STAT)
		3741	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3742	}
		3743	else
		3744	#endif
		3745	if (types & EV_TIMER)
		3746	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3747
		3748	#if EV_PERIODIC_ENABLE
		3749	if (types & EV_PERIODIC)
		3750	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3751	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3752	#endif
		3753
		3754	#if EV_IDLE_ENABLE
		3755	if (types & EV_IDLE)
		3756	for (j = NUMPRI; i--; )
		3757	for (i = idlecnt [j]; i--; )
		3758	cb (EV_A_ EV_IDLE, idles [j][i]);
		3759	#endif
		3760
		3761	#if EV_FORK_ENABLE
		3762	if (types & EV_FORK)
		3763	for (i = forkcnt; i--; )
		3764	if (ev_cb (forks [i]) != embed_fork_cb)
		3765	cb (EV_A_ EV_FORK, forks [i]);
		3766	#endif
		3767
		3768	#if EV_ASYNC_ENABLE
		3769	if (types & EV_ASYNC)
		3770	for (i = asynccnt; i--; )
		3771	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3772	#endif
		3773
		3774	#if EV_PREPARE_ENABLE
		3775	if (types & EV_PREPARE)
		3776	for (i = preparecnt; i--; )
		3777	# if EV_EMBED_ENABLE
		3778	if (ev_cb (prepares [i]) != embed_prepare_cb)
1724	#endif	3779	# endif
		3780	cb (EV_A_ EV_PREPARE, prepares [i]);
		3781	#endif
1725		3782
		3783	#if EV_CHECK_ENABLE
		3784	if (types & EV_CHECK)
		3785	for (i = checkcnt; i--; )
		3786	cb (EV_A_ EV_CHECK, checks [i]);
		3787	#endif
		3788
		3789	#if EV_SIGNAL_ENABLE
		3790	if (types & EV_SIGNAL)
		3791	for (i = 0; i < EV_NSIG - 1; ++i)
		3792	for (wl = signals [i].head; wl; )
		3793	{
		3794	wn = wl->next;
		3795	cb (EV_A_ EV_SIGNAL, wl);
		3796	wl = wn;
		3797	}
		3798	#endif
		3799
		3800	#if EV_CHILD_ENABLE
		3801	if (types & EV_CHILD)
		3802	for (i = (EV_PID_HASHSIZE); i--; )
		3803	for (wl = childs [i]; wl; )
		3804	{
		3805	wn = wl->next;
		3806	cb (EV_A_ EV_CHILD, wl);
		3807	wl = wn;
		3808	}
		3809	#endif
		3810	/* EV_STAT 0x00001000 /* stat data changed */
		3811	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3812	}
		3813	#endif
		3814
		3815	#if EV_MULTIPLICITY
		3816	#include "ev_wrap.h"
		3817	#endif
		3818
		3819	EV_CPP(})
		3820

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