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

Comparing libev/ev.c (file contents):
Revision 1.89 by root, Sat Nov 10 19:48:44 2007 UTC vs.
Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	/* this big block deduces configuration from config.h */
33	extern "C" {
34	#endif
35
36	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
		42	# ifdef EV_CONFIG_H
		43	# include EV_CONFIG_H
		44	# else
37	# include "config.h"	45	# include "config.h"
		46	# endif
		47
		48	# if HAVE_CLOCK_SYSCALL
		49	# ifndef EV_USE_CLOCK_SYSCALL
		50	# define EV_USE_CLOCK_SYSCALL 1
		51	# ifndef EV_USE_REALTIME
		52	# define EV_USE_REALTIME 0
		53	# endif
		54	# ifndef EV_USE_MONOTONIC
		55	# define EV_USE_MONOTONIC 1
		56	# endif
		57	# endif
		58	# elif !defined(EV_USE_CLOCK_SYSCALL)
		59	# define EV_USE_CLOCK_SYSCALL 0
		60	# endif
38		61
39	# if HAVE_CLOCK_GETTIME	62	# if HAVE_CLOCK_GETTIME
		63	# ifndef EV_USE_MONOTONIC
40	# define EV_USE_MONOTONIC 1	64	# define EV_USE_MONOTONIC 1
		65	# endif
		66	# ifndef EV_USE_REALTIME
41	# define EV_USE_REALTIME 1	67	# define EV_USE_REALTIME 0
		68	# endif
		69	# else
		70	# ifndef EV_USE_MONOTONIC
		71	# define EV_USE_MONOTONIC 0
		72	# endif
		73	# ifndef EV_USE_REALTIME
		74	# define EV_USE_REALTIME 0
		75	# endif
42	# endif	76	# endif
43		77
		78	# if HAVE_NANOSLEEP
		79	# ifndef EV_USE_NANOSLEEP
		80	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		81	# endif
		82	# else
		83	# undef EV_USE_NANOSLEEP
		84	# define EV_USE_NANOSLEEP 0
		85	# endif
		86
44	# if HAVE_SELECT && HAVE_SYS_SELECT_H	87	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		88	# ifndef EV_USE_SELECT
		89	# define EV_USE_SELECT EV_FEATURE_BACKENDS
		90	# endif
		91	# else
		92	# undef EV_USE_SELECT
45	# define EV_USE_SELECT 1	93	# define EV_USE_SELECT 0
46	# endif	94	# endif
47		95
48	# if HAVE_POLL && HAVE_POLL_H	96	# if HAVE_POLL && HAVE_POLL_H
		97	# ifndef EV_USE_POLL
		98	# define EV_USE_POLL EV_FEATURE_BACKENDS
		99	# endif
		100	# else
		101	# undef EV_USE_POLL
49	# define EV_USE_POLL 1	102	# define EV_USE_POLL 0
50	# endif	103	# endif
51		104
52	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	105	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		106	# ifndef EV_USE_EPOLL
		107	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		108	# endif
		109	# else
		110	# undef EV_USE_EPOLL
53	# define EV_USE_EPOLL 1	111	# define EV_USE_EPOLL 0
54	# endif	112	# endif
55		113
56	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	114	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
		115	# ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
		117	# endif
		118	# else
		119	# undef EV_USE_KQUEUE
57	# define EV_USE_KQUEUE 1	120	# define EV_USE_KQUEUE 0
58	# endif	121	# endif
		122
		123	# if HAVE_PORT_H && HAVE_PORT_CREATE
		124	# ifndef EV_USE_PORT
		125	# define EV_USE_PORT EV_FEATURE_BACKENDS
		126	# endif
		127	# else
		128	# undef EV_USE_PORT
		129	# define EV_USE_PORT 0
		130	# endif
59		131
		132	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		133	# ifndef EV_USE_INOTIFY
		134	# define EV_USE_INOTIFY EV_FEATURE_OS
		135	# endif
		136	# else
		137	# undef EV_USE_INOTIFY
		138	# define EV_USE_INOTIFY 0
		139	# endif
		140
		141	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		142	# ifndef EV_USE_SIGNALFD
		143	# define EV_USE_SIGNALFD EV_FEATURE_OS
		144	# endif
		145	# else
		146	# undef EV_USE_SIGNALFD
		147	# define EV_USE_SIGNALFD 0
		148	# endif
		149
		150	# if HAVE_EVENTFD
		151	# ifndef EV_USE_EVENTFD
		152	# define EV_USE_EVENTFD EV_FEATURE_OS
		153	# endif
		154	# else
		155	# undef EV_USE_EVENTFD
		156	# define EV_USE_EVENTFD 0
		157	# endif
		158
60	#endif	159	#endif
61		160
62	#include <math.h>	161	#include <math.h>
63	#include <stdlib.h>	162	#include <stdlib.h>
		163	#include <string.h>
64	#include <fcntl.h>	164	#include <fcntl.h>
65	#include <stddef.h>	165	#include <stddef.h>
66		166
67	#include <stdio.h>	167	#include <stdio.h>
68		168
69	#include <assert.h>	169	#include <assert.h>
70	#include <errno.h>	170	#include <errno.h>
71	#include <sys/types.h>	171	#include <sys/types.h>
72	#include <time.h>	172	#include <time.h>
		173	#include <limits.h>
73		174
74	#include <signal.h>	175	#include <signal.h>
75
76	#ifndef WIN32
77	# include <unistd.h>
78	# include <sys/time.h>
79	# include <sys/wait.h>
80	#endif
81	/**/
82
83	#ifndef EV_USE_MONOTONIC
84	# define EV_USE_MONOTONIC 1
85	#endif
86
87	#ifndef EV_USE_SELECT
88	# define EV_USE_SELECT 1
89	#endif
90
91	#ifndef EV_USE_POLL
92	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
93	#endif
94
95	#ifndef EV_USE_EPOLL
96	# define EV_USE_EPOLL 0
97	#endif
98
99	#ifndef EV_USE_KQUEUE
100	# define EV_USE_KQUEUE 0
101	#endif
102
103	#ifndef EV_USE_WIN32
104	# ifdef WIN32
105	# define EV_USE_WIN32 0 /* it does not exist, use select */
106	# undef EV_USE_SELECT
107	# define EV_USE_SELECT 1
108	# else
109	# define EV_USE_WIN32 0
110	# endif
111	#endif
112
113	#ifndef EV_USE_REALTIME
114	# define EV_USE_REALTIME 1
115	#endif
116
117	/**/
118
119	#ifndef CLOCK_MONOTONIC
120	# undef EV_USE_MONOTONIC
121	# define EV_USE_MONOTONIC 0
122	#endif
123
124	#ifndef CLOCK_REALTIME
125	# undef EV_USE_REALTIME
126	# define EV_USE_REALTIME 0
127	#endif
128
129	/**/
130
131	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
132	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
133	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
134	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
135		176
136	#ifdef EV_H	177	#ifdef EV_H
137	# include EV_H	178	# include EV_H
138	#else	179	#else
139	# include "ev.h"	180	# include "ev.h"
140	#endif	181	#endif
141		182
		183	EV_CPP(extern "C" {)
		184
		185	#ifndef _WIN32
		186	# include <sys/time.h>
		187	# include <sys/wait.h>
		188	# include <unistd.h>
		189	#else
		190	# include <io.h>
		191	# define WIN32_LEAN_AND_MEAN
		192	# include <windows.h>
		193	# ifndef EV_SELECT_IS_WINSOCKET
		194	# define EV_SELECT_IS_WINSOCKET 1
		195	# endif
		196	# undef EV_AVOID_STDIO
		197	#endif
		198
		199	/* OS X, in its infinite idiocy, actually HARDCODES
		200	* a limit of 1024 into their select. Where people have brains,
		201	* OS X engineers apparently have a vacuum. Or maybe they were
		202	* ordered to have a vacuum, or they do anything for money.
		203	* This might help. Or not.
		204	*/
		205	#define _DARWIN_UNLIMITED_SELECT 1
		206
		207	/* this block tries to deduce configuration from header-defined symbols and defaults */
		208
		209	/* try to deduce the maximum number of signals on this platform */
		210	#if defined (EV_NSIG)
		211	/* use what's provided */
		212	#elif defined (NSIG)
		213	# define EV_NSIG (NSIG)
		214	#elif defined(_NSIG)
		215	# define EV_NSIG (_NSIG)
		216	#elif defined (SIGMAX)
		217	# define EV_NSIG (SIGMAX+1)
		218	#elif defined (SIG_MAX)
		219	# define EV_NSIG (SIG_MAX+1)
		220	#elif defined (_SIG_MAX)
		221	# define EV_NSIG (_SIG_MAX+1)
		222	#elif defined (MAXSIG)
		223	# define EV_NSIG (MAXSIG+1)
		224	#elif defined (MAX_SIG)
		225	# define EV_NSIG (MAX_SIG+1)
		226	#elif defined (SIGARRAYSIZE)
		227	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		228	#elif defined (_sys_nsig)
		229	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		230	#else
		231	# error "unable to find value for NSIG, please report"
		232	/* to make it compile regardless, just remove the above line, */
		233	/* but consider reporting it, too! :) */
		234	# define EV_NSIG 65
		235	#endif
		236
		237	#ifndef EV_USE_CLOCK_SYSCALL
		238	# if __linux && __GLIBC__ >= 2
		239	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
		240	# else
		241	# define EV_USE_CLOCK_SYSCALL 0
		242	# endif
		243	#endif
		244
		245	#ifndef EV_USE_MONOTONIC
		246	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		247	# define EV_USE_MONOTONIC EV_FEATURE_OS
		248	# else
		249	# define EV_USE_MONOTONIC 0
		250	# endif
		251	#endif
		252
		253	#ifndef EV_USE_REALTIME
		254	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
		255	#endif
		256
		257	#ifndef EV_USE_NANOSLEEP
		258	# if _POSIX_C_SOURCE >= 199309L
		259	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		260	# else
		261	# define EV_USE_NANOSLEEP 0
		262	# endif
		263	#endif
		264
		265	#ifndef EV_USE_SELECT
		266	# define EV_USE_SELECT EV_FEATURE_BACKENDS
		267	#endif
		268
		269	#ifndef EV_USE_POLL
		270	# ifdef _WIN32
		271	# define EV_USE_POLL 0
		272	# else
		273	# define EV_USE_POLL EV_FEATURE_BACKENDS
		274	# endif
		275	#endif
		276
		277	#ifndef EV_USE_EPOLL
		278	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		279	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		280	# else
		281	# define EV_USE_EPOLL 0
		282	# endif
		283	#endif
		284
		285	#ifndef EV_USE_KQUEUE
		286	# define EV_USE_KQUEUE 0
		287	#endif
		288
		289	#ifndef EV_USE_PORT
		290	# define EV_USE_PORT 0
		291	#endif
		292
		293	#ifndef EV_USE_INOTIFY
		294	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		295	# define EV_USE_INOTIFY EV_FEATURE_OS
		296	# else
		297	# define EV_USE_INOTIFY 0
		298	# endif
		299	#endif
		300
		301	#ifndef EV_PID_HASHSIZE
		302	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		303	#endif
		304
		305	#ifndef EV_INOTIFY_HASHSIZE
		306	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		307	#endif
		308
		309	#ifndef EV_USE_EVENTFD
		310	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		311	# define EV_USE_EVENTFD EV_FEATURE_OS
		312	# else
		313	# define EV_USE_EVENTFD 0
		314	# endif
		315	#endif
		316
		317	#ifndef EV_USE_SIGNALFD
		318	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		319	# define EV_USE_SIGNALFD EV_FEATURE_OS
		320	# else
		321	# define EV_USE_SIGNALFD 0
		322	# endif
		323	#endif
		324
		325	#if 0 /* debugging */
		326	# define EV_VERIFY 3
		327	# define EV_USE_4HEAP 1
		328	# define EV_HEAP_CACHE_AT 1
		329	#endif
		330
		331	#ifndef EV_VERIFY
		332	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
		333	#endif
		334
		335	#ifndef EV_USE_4HEAP
		336	# define EV_USE_4HEAP EV_FEATURE_DATA
		337	#endif
		338
		339	#ifndef EV_HEAP_CACHE_AT
		340	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
		341	#endif
		342
		343	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		344	/* which makes programs even slower. might work on other unices, too. */
		345	#if EV_USE_CLOCK_SYSCALL
		346	# include <syscall.h>
		347	# ifdef SYS_clock_gettime
		348	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		349	# undef EV_USE_MONOTONIC
		350	# define EV_USE_MONOTONIC 1
		351	# else
		352	# undef EV_USE_CLOCK_SYSCALL
		353	# define EV_USE_CLOCK_SYSCALL 0
		354	# endif
		355	#endif
		356
		357	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		358
		359	#ifdef _AIX
		360	/* AIX has a completely broken poll.h header */
		361	# undef EV_USE_POLL
		362	# define EV_USE_POLL 0
		363	#endif
		364
		365	#ifndef CLOCK_MONOTONIC
		366	# undef EV_USE_MONOTONIC
		367	# define EV_USE_MONOTONIC 0
		368	#endif
		369
		370	#ifndef CLOCK_REALTIME
		371	# undef EV_USE_REALTIME
		372	# define EV_USE_REALTIME 0
		373	#endif
		374
		375	#if !EV_STAT_ENABLE
		376	# undef EV_USE_INOTIFY
		377	# define EV_USE_INOTIFY 0
		378	#endif
		379
		380	#if !EV_USE_NANOSLEEP
		381	# ifndef _WIN32
		382	# include <sys/select.h>
		383	# endif
		384	#endif
		385
		386	#if EV_USE_INOTIFY
		387	# include <sys/statfs.h>
		388	# include <sys/inotify.h>
		389	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		390	# ifndef IN_DONT_FOLLOW
		391	# undef EV_USE_INOTIFY
		392	# define EV_USE_INOTIFY 0
		393	# endif
		394	#endif
		395
		396	#if EV_SELECT_IS_WINSOCKET
		397	# include <winsock.h>
		398	#endif
		399
		400	#if EV_USE_EVENTFD
		401	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		402	# include <stdint.h>
		403	# ifndef EFD_NONBLOCK
		404	# define EFD_NONBLOCK O_NONBLOCK
		405	# endif
		406	# ifndef EFD_CLOEXEC
		407	# ifdef O_CLOEXEC
		408	# define EFD_CLOEXEC O_CLOEXEC
		409	# else
		410	# define EFD_CLOEXEC 02000000
		411	# endif
		412	# endif
		413	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
		414	#endif
		415
		416	#if EV_USE_SIGNALFD
		417	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		418	# include <stdint.h>
		419	# ifndef SFD_NONBLOCK
		420	# define SFD_NONBLOCK O_NONBLOCK
		421	# endif
		422	# ifndef SFD_CLOEXEC
		423	# ifdef O_CLOEXEC
		424	# define SFD_CLOEXEC O_CLOEXEC
		425	# else
		426	# define SFD_CLOEXEC 02000000
		427	# endif
		428	# endif
		429	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
		430
		431	struct signalfd_siginfo
		432	{
		433	uint32_t ssi_signo;
		434	char pad[128 - sizeof (uint32_t)];
		435	};
		436	#endif
		437
		438	/**/
		439
		440	#if EV_VERIFY >= 3
		441	# define EV_FREQUENT_CHECK ev_verify (EV_A)
		442	#else
		443	# define EV_FREQUENT_CHECK do { } while (0)
		444	#endif
		445
		446	/*
		447	* This is used to avoid floating point rounding problems.
		448	* It is added to ev_rt_now when scheduling periodics
		449	* to ensure progress, time-wise, even when rounding
		450	* errors are against us.
		451	* This value is good at least till the year 4000.
		452	* Better solutions welcome.
		453	*/
		454	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		455
		456	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		457	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		458
		459	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
		460	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
		461
142	#if __GNUC__ >= 3	462	#if __GNUC__ >= 4
143	# define expect(expr,value) __builtin_expect ((expr),(value))	463	# define expect(expr,value) __builtin_expect ((expr),(value))
144	# define inline inline	464	# define noinline __attribute__ ((noinline))
145	#else	465	#else
146	# define expect(expr,value) (expr)	466	# define expect(expr,value) (expr)
147	# define inline static	467	# define noinline
		468	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		469	# define inline
		470	# endif
148	#endif	471	#endif
149		472
150	#define expect_false(expr) expect ((expr) != 0, 0)	473	#define expect_false(expr) expect ((expr) != 0, 0)
151	#define expect_true(expr) expect ((expr) != 0, 1)	474	#define expect_true(expr) expect ((expr) != 0, 1)
		475	#define inline_size static inline
152		476
		477	#if EV_FEATURE_CODE
		478	# define inline_speed static inline
		479	#else
		480	# define inline_speed static noinline
		481	#endif
		482
153	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	483	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		484
		485	#if EV_MINPRI == EV_MAXPRI
		486	# define ABSPRI(w) (((W)w), 0)
		487	#else
154	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	488	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		489	#endif
155		490
		491	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		492	#define EMPTY2(a,b) /* used to suppress some warnings */
		493
156	typedef struct ev_watcher *W;	494	typedef ev_watcher *W;
157	typedef struct ev_watcher_list *WL;	495	typedef ev_watcher_list *WL;
158	typedef struct ev_watcher_time *WT;	496	typedef ev_watcher_time *WT;
159		497
		498	#define ev_active(w) ((W)(w))->active
		499	#define ev_at(w) ((WT)(w))->at
		500
		501	#if EV_USE_REALTIME
		502	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		503	/* giving it a reasonably high chance of working on typical architectures */
		504	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		505	#endif
		506
		507	#if EV_USE_MONOTONIC
160	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	508	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		509	#endif
161		510
		511	#ifndef EV_FD_TO_WIN32_HANDLE
		512	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		513	#endif
		514	#ifndef EV_WIN32_HANDLE_TO_FD
		515	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		516	#endif
		517	#ifndef EV_WIN32_CLOSE_FD
		518	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		519	#endif
		520
		521	#ifdef _WIN32
162	#include "ev_win32.c"	522	# include "ev_win32.c"
		523	#endif
163		524
164	/*****************************************************************************/	525	/*****************************************************************************/
165		526
		527	#ifdef __linux
		528	# include <sys/utsname.h>
		529	#endif
		530
		531	static unsigned int noinline
		532	ev_linux_version (void)
		533	{
		534	#ifdef __linux
		535	unsigned int v = 0;
		536	struct utsname buf;
		537	int i;
		538	char *p = buf.release;
		539
		540	if (uname (&buf))
		541	return 0;
		542
		543	for (i = 3+1; --i; )
		544	{
		545	unsigned int c = 0;
		546
		547	for (;;)
		548	{
		549	if (p >= '0' && p <= '9')
		550	c = c * 10 + *p++ - '0';
		551	else
		552	{
		553	p += *p == '.';
		554	break;
		555	}
		556	}
		557
		558	v = (v << 8) \| c;
		559	}
		560
		561	return v;
		562	#else
		563	return 0;
		564	#endif
		565	}
		566
		567	/*****************************************************************************/
		568
		569	#if EV_AVOID_STDIO
		570	static void noinline
		571	ev_printerr (const char *msg)
		572	{
		573	write (STDERR_FILENO, msg, strlen (msg));
		574	}
		575	#endif
		576
166	static void (syserr_cb)(const char msg);	577	static void (syserr_cb)(const char msg);
167		578
		579	void
168	void ev_set_syserr_cb (void (cb)(const char msg))	580	ev_set_syserr_cb (void (cb)(const char msg))
169	{	581	{
170	syserr_cb = cb;	582	syserr_cb = cb;
171	}	583	}
172		584
173	static void	585	static void noinline
174	syserr (const char *msg)	586	ev_syserr (const char *msg)
175	{	587	{
176	if (!msg)	588	if (!msg)
177	msg = "(libev) system error";	589	msg = "(libev) system error";
178		590
179	if (syserr_cb)	591	if (syserr_cb)
180	syserr_cb (msg);	592	syserr_cb (msg);
181	else	593	else
182	{	594	{
		595	#if EV_AVOID_STDIO
		596	const char *err = strerror (errno);
		597
		598	ev_printerr (msg);
		599	ev_printerr (": ");
		600	ev_printerr (err);
		601	ev_printerr ("\n");
		602	#else
183	perror (msg);	603	perror (msg);
		604	#endif
184	abort ();	605	abort ();
185	}	606	}
186	}	607	}
187		608
		609	static void *
		610	ev_realloc_emul (void *ptr, long size)
		611	{
		612	#if __GLIBC__
		613	return realloc (ptr, size);
		614	#else
		615	/* some systems, notably openbsd and darwin, fail to properly
		616	* implement realloc (x, 0) (as required by both ansi c-89 and
		617	* the single unix specification, so work around them here.
		618	*/
		619
		620	if (size)
		621	return realloc (ptr, size);
		622
		623	free (ptr);
		624	return 0;
		625	#endif
		626	}
		627
188	static void (alloc)(void *ptr, long size);	628	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
189		629
		630	void
190	void ev_set_allocator (void (cb)(void *ptr, long size))	631	ev_set_allocator (void (cb)(void *ptr, long size))
191	{	632	{
192	alloc = cb;	633	alloc = cb;
193	}	634	}
194		635
195	static void *	636	inline_speed void *
196	ev_realloc (void *ptr, long size)	637	ev_realloc (void *ptr, long size)
197	{	638	{
198	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	639	ptr = alloc (ptr, size);
199		640
200	if (!ptr && size)	641	if (!ptr && size)
201	{	642	{
		643	#if EV_AVOID_STDIO
		644	ev_printerr ("libev: memory allocation failed, aborting.\n");
		645	#else
202	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	646	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		647	#endif
203	abort ();	648	abort ();
204	}	649	}
205		650
206	return ptr;	651	return ptr;
207	}	652	}
209	#define ev_malloc(size) ev_realloc (0, (size))	654	#define ev_malloc(size) ev_realloc (0, (size))
210	#define ev_free(ptr) ev_realloc ((ptr), 0)	655	#define ev_free(ptr) ev_realloc ((ptr), 0)
211		656
212	/*****************************************************************************/	657	/*****************************************************************************/
213		658
		659	/* set in reify when reification needed */
		660	#define EV_ANFD_REIFY 1
		661
		662	/* file descriptor info structure */
214	typedef struct	663	typedef struct
215	{	664	{
216	WL head;	665	WL head;
217	unsigned char events;	666	unsigned char events; /* the events watched for */
		667	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		668	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
218	unsigned char reify;	669	unsigned char unused;
		670	#if EV_USE_EPOLL
		671	unsigned int egen; /* generation counter to counter epoll bugs */
		672	#endif
		673	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		674	SOCKET handle;
		675	#endif
		676	#if EV_USE_IOCP
		677	OVERLAPPED or, ow;
		678	#endif
219	} ANFD;	679	} ANFD;
220		680
		681	/* stores the pending event set for a given watcher */
221	typedef struct	682	typedef struct
222	{	683	{
223	W w;	684	W w;
224	int events;	685	int events; /* the pending event set for the given watcher */
225	} ANPENDING;	686	} ANPENDING;
		687
		688	#if EV_USE_INOTIFY
		689	/* hash table entry per inotify-id */
		690	typedef struct
		691	{
		692	WL head;
		693	} ANFS;
		694	#endif
		695
		696	/* Heap Entry */
		697	#if EV_HEAP_CACHE_AT
		698	/* a heap element */
		699	typedef struct {
		700	ev_tstamp at;
		701	WT w;
		702	} ANHE;
		703
		704	#define ANHE_w(he) (he).w /* access watcher, read-write */
		705	#define ANHE_at(he) (he).at /* access cached at, read-only */
		706	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		707	#else
		708	/* a heap element */
		709	typedef WT ANHE;
		710
		711	#define ANHE_w(he) (he)
		712	#define ANHE_at(he) (he)->at
		713	#define ANHE_at_cache(he)
		714	#endif
226		715
227	#if EV_MULTIPLICITY	716	#if EV_MULTIPLICITY
228		717
229	struct ev_loop	718	struct ev_loop
230	{	719	{
231	ev_tstamp ev_rt_now;	720	ev_tstamp ev_rt_now;
		721	#define ev_rt_now ((loop)->ev_rt_now)
232	#define VAR(name,decl) decl;	722	#define VAR(name,decl) decl;
233	#include "ev_vars.h"	723	#include "ev_vars.h"
234	#undef VAR	724	#undef VAR
235	};	725	};
236	#include "ev_wrap.h"	726	#include "ev_wrap.h"
237		727
238	struct ev_loop default_loop_struct;	728	static struct ev_loop default_loop_struct;
239	static struct ev_loop *default_loop;	729	struct ev_loop *ev_default_loop_ptr;
240		730
241	#else	731	#else
242		732
243	ev_tstamp ev_rt_now;	733	ev_tstamp ev_rt_now;
244	#define VAR(name,decl) static decl;	734	#define VAR(name,decl) static decl;
245	#include "ev_vars.h"	735	#include "ev_vars.h"
246	#undef VAR	736	#undef VAR
247		737
248	static int default_loop;	738	static int ev_default_loop_ptr;
249		739
250	#endif	740	#endif
		741
		742	#if EV_FEATURE_API
		743	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		744	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		745	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		746	#else
		747	# define EV_RELEASE_CB (void)0
		748	# define EV_ACQUIRE_CB (void)0
		749	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		750	#endif
		751
		752	#define EVBREAK_RECURSE 0x80
251		753
252	/*****************************************************************************/	754	/*****************************************************************************/
253		755
254	inline ev_tstamp	756	#ifndef EV_HAVE_EV_TIME
		757	ev_tstamp
255	ev_time (void)	758	ev_time (void)
256	{	759	{
257	#if EV_USE_REALTIME	760	#if EV_USE_REALTIME
		761	if (expect_true (have_realtime))
		762	{
258	struct timespec ts;	763	struct timespec ts;
259	clock_gettime (CLOCK_REALTIME, &ts);	764	clock_gettime (CLOCK_REALTIME, &ts);
260	return ts.tv_sec + ts.tv_nsec * 1e-9;	765	return ts.tv_sec + ts.tv_nsec * 1e-9;
261	#else	766	}
		767	#endif
		768
262	struct timeval tv;	769	struct timeval tv;
263	gettimeofday (&tv, 0);	770	gettimeofday (&tv, 0);
264	return tv.tv_sec + tv.tv_usec * 1e-6;	771	return tv.tv_sec + tv.tv_usec * 1e-6;
265	#endif
266	}	772	}
		773	#endif
267		774
268	inline ev_tstamp	775	inline_size ev_tstamp
269	get_clock (void)	776	get_clock (void)
270	{	777	{
271	#if EV_USE_MONOTONIC	778	#if EV_USE_MONOTONIC
272	if (expect_true (have_monotonic))	779	if (expect_true (have_monotonic))
273	{	780	{
…		…
286	{	793	{
287	return ev_rt_now;	794	return ev_rt_now;
288	}	795	}
289	#endif	796	#endif
290		797
291	#define array_roundsize(type,n) ((n) \| 4 & ~3)	798	void
		799	ev_sleep (ev_tstamp delay)
		800	{
		801	if (delay > 0.)
		802	{
		803	#if EV_USE_NANOSLEEP
		804	struct timespec ts;
		805
		806	EV_TS_SET (ts, delay);
		807	nanosleep (&ts, 0);
		808	#elif defined(_WIN32)
		809	Sleep ((unsigned long)(delay * 1e3));
		810	#else
		811	struct timeval tv;
		812
		813	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		814	/* something not guaranteed by newer posix versions, but guaranteed */
		815	/* by older ones */
		816	EV_TV_SET (tv, delay);
		817	select (0, 0, 0, 0, &tv);
		818	#endif
		819	}
		820	}
		821
		822	/*****************************************************************************/
		823
		824	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		825
		826	/* find a suitable new size for the given array, */
		827	/* hopefully by rounding to a nice-to-malloc size */
		828	inline_size int
		829	array_nextsize (int elem, int cur, int cnt)
		830	{
		831	int ncur = cur + 1;
		832
		833	do
		834	ncur <<= 1;
		835	while (cnt > ncur);
		836
		837	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		838	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
		839	{
		840	ncur *= elem;
		841	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
		842	ncur = ncur - sizeof (void ) 4;
		843	ncur /= elem;
		844	}
		845
		846	return ncur;
		847	}
		848
		849	static noinline void *
		850	array_realloc (int elem, void base, int cur, int cnt)
		851	{
		852	cur = array_nextsize (elem, cur, cnt);
		853	return ev_realloc (base, elem * *cur);
		854	}
		855
		856	#define array_init_zero(base,count) \
		857	memset ((void )(base), 0, sizeof ((base)) * (count))
292		858
293	#define array_needsize(type,base,cur,cnt,init) \	859	#define array_needsize(type,base,cur,cnt,init) \
294	if (expect_false ((cnt) > cur)) \	860	if (expect_false ((cnt) > (cur))) \
295	{ \	861	{ \
296	int newcnt = cur; \	862	int ocur_ = (cur); \
297	do \	863	(base) = (type *)array_realloc \
298	{ \	864	(sizeof (type), (base), &(cur), (cnt)); \
299	newcnt = array_roundsize (type, newcnt << 1); \	865	init ((base) + (ocur_), (cur) - ocur_); \
300	} \
301	while ((cnt) > newcnt); \
302	\
303	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
304	init (base + cur, newcnt - cur); \
305	cur = newcnt; \
306	}	866	}
307		867
		868	#if 0
308	#define array_slim(type,stem) \	869	#define array_slim(type,stem) \
309	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	870	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
310	{ \	871	{ \
311	stem ## max = array_roundsize (stem ## cnt >> 1); \	872	stem ## max = array_roundsize (stem ## cnt >> 1); \
312	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\	873	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
313	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\	874	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
314	}	875	}
315		876	#endif
316	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
317	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
318	#define array_free_microshit(stem) \
319	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
320		877
321	#define array_free(stem, idx) \	878	#define array_free(stem, idx) \
322	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	879	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
323		880
324	/*****************************************************************************/	881	/*****************************************************************************/
325		882
326	static void	883	/* dummy callback for pending events */
327	anfds_init (ANFD *base, int count)	884	static void noinline
		885	pendingcb (EV_P_ ev_prepare *w, int revents)
328	{	886	{
329	while (count--)
330	{
331	base->head = 0;
332	base->events = EV_NONE;
333	base->reify = 0;
334
335	++base;
336	}
337	}	887	}
338		888
339	void	889	void noinline
340	ev_feed_event (EV_P_ void *w, int revents)	890	ev_feed_event (EV_P_ void *w, int revents)
341	{	891	{
342	W w_ = (W)w;	892	W w_ = (W)w;
		893	int pri = ABSPRI (w_);
343		894
344	if (w_->pending)	895	if (expect_false (w_->pending))
		896	pendings [pri][w_->pending - 1].events \|= revents;
		897	else
345	{	898	{
		899	w_->pending = ++pendingcnt [pri];
		900	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		901	pendings [pri][w_->pending - 1].w = w_;
346	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;	902	pendings [pri][w_->pending - 1].events = revents;
347	return;
348	}	903	}
349
350	w_->pending = ++pendingcnt [ABSPRI (w_)];
351	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
352	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
353	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
354	}	904	}
355		905
356	static void	906	inline_speed void
		907	feed_reverse (EV_P_ W w)
		908	{
		909	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		910	rfeeds [rfeedcnt++] = w;
		911	}
		912
		913	inline_size void
		914	feed_reverse_done (EV_P_ int revents)
		915	{
		916	do
		917	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		918	while (rfeedcnt);
		919	}
		920
		921	inline_speed void
357	queue_events (EV_P_ W *events, int eventcnt, int type)	922	queue_events (EV_P_ W *events, int eventcnt, int type)
358	{	923	{
359	int i;	924	int i;
360		925
361	for (i = 0; i < eventcnt; ++i)	926	for (i = 0; i < eventcnt; ++i)
362	ev_feed_event (EV_A_ events [i], type);	927	ev_feed_event (EV_A_ events [i], type);
363	}	928	}
364		929
		930	/*****************************************************************************/
		931
365	inline void	932	inline_speed void
366	fd_event (EV_P_ int fd, int revents)	933	fd_event_nocheck (EV_P_ int fd, int revents)
367	{	934	{
368	ANFD *anfd = anfds + fd;	935	ANFD *anfd = anfds + fd;
369	struct ev_io *w;	936	ev_io *w;
370		937
371	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)	938	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
372	{	939	{
373	int ev = w->events & revents;	940	int ev = w->events & revents;
374		941
375	if (ev)	942	if (ev)
376	ev_feed_event (EV_A_ (W)w, ev);	943	ev_feed_event (EV_A_ (W)w, ev);
377	}	944	}
378	}	945	}
379		946
		947	/* do not submit kernel events for fds that have reify set */
		948	/* because that means they changed while we were polling for new events */
		949	inline_speed void
		950	fd_event (EV_P_ int fd, int revents)
		951	{
		952	ANFD *anfd = anfds + fd;
		953
		954	if (expect_true (!anfd->reify))
		955	fd_event_nocheck (EV_A_ fd, revents);
		956	}
		957
380	void	958	void
381	ev_feed_fd_event (EV_P_ int fd, int revents)	959	ev_feed_fd_event (EV_P_ int fd, int revents)
382	{	960	{
		961	if (fd >= 0 && fd < anfdmax)
383	fd_event (EV_A_ fd, revents);	962	fd_event_nocheck (EV_A_ fd, revents);
384	}	963	}
385		964
386	/*****************************************************************************/	965	/* make sure the external fd watch events are in-sync */
387		966	/* with the kernel/libev internal state */
388	static void	967	inline_size void
389	fd_reify (EV_P)	968	fd_reify (EV_P)
390	{	969	{
391	int i;	970	int i;
392		971
393	for (i = 0; i < fdchangecnt; ++i)	972	for (i = 0; i < fdchangecnt; ++i)
394	{	973	{
395	int fd = fdchanges [i];	974	int fd = fdchanges [i];
396	ANFD *anfd = anfds + fd;	975	ANFD *anfd = anfds + fd;
397	struct ev_io *w;	976	ev_io *w;
398		977
399	int events = 0;	978	unsigned char o_events = anfd->events;
		979	unsigned char o_reify = anfd->reify;
400		980
401	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
402	events \|= w->events;
403
404	anfd->reify = 0;	981	anfd->reify = 0;
405		982
406	method_modify (EV_A_ fd, anfd->events, events);	983	#if EV_SELECT_IS_WINSOCKET \|\| EV_USE_IOCP
		984	if (o_reify & EV__IOFDSET)
		985	{
		986	unsigned long arg;
		987	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		988	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
		989	printf ("oi %d %x\n", fd, anfd->handle);//D
		990	}
		991	#endif
		992
		993	/if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation /
		994	{
407	anfd->events = events;	995	anfd->events = 0;
		996
		997	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		998	anfd->events \|= (unsigned char)w->events;
		999
		1000	if (o_events != anfd->events)
		1001	o_reify = EV__IOFDSET; /* actually \|= */
		1002	}
		1003
		1004	if (o_reify & EV__IOFDSET)
		1005	backend_modify (EV_A_ fd, o_events, anfd->events);
408	}	1006	}
409		1007
410	fdchangecnt = 0;	1008	fdchangecnt = 0;
411	}	1009	}
412		1010
413	static void	1011	/* something about the given fd changed */
		1012	inline_size void
414	fd_change (EV_P_ int fd)	1013	fd_change (EV_P_ int fd, int flags)
415	{	1014	{
416	if (anfds [fd].reify)	1015	unsigned char reify = anfds [fd].reify;
417	return;
418
419	anfds [fd].reify = 1;	1016	anfds [fd].reify \|= flags;
420		1017
		1018	if (expect_true (!reify))
		1019	{
421	++fdchangecnt;	1020	++fdchangecnt;
422	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));	1021	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
423	fdchanges [fdchangecnt - 1] = fd;	1022	fdchanges [fdchangecnt - 1] = fd;
		1023	}
424	}	1024	}
425		1025
426	static void	1026	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		1027	inline_speed void
427	fd_kill (EV_P_ int fd)	1028	fd_kill (EV_P_ int fd)
428	{	1029	{
429	struct ev_io *w;	1030	ev_io *w;
430		1031
431	while ((w = (struct ev_io *)anfds [fd].head))	1032	while ((w = (ev_io *)anfds [fd].head))
432	{	1033	{
433	ev_io_stop (EV_A_ w);	1034	ev_io_stop (EV_A_ w);
434	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1035	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
435	}	1036	}
436	}	1037	}
437		1038
438	static int	1039	/* check whether the given fd is actually valid, for error recovery */
		1040	inline_size int
439	fd_valid (int fd)	1041	fd_valid (int fd)
440	{	1042	{
441	#ifdef WIN32	1043	#ifdef _WIN32
442	return !!win32_get_osfhandle (fd);	1044	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
443	#else	1045	#else
444	return fcntl (fd, F_GETFD) != -1;	1046	return fcntl (fd, F_GETFD) != -1;
445	#endif	1047	#endif
446	}	1048	}
447		1049
448	/* called on EBADF to verify fds */	1050	/* called on EBADF to verify fds */
449	static void	1051	static void noinline
450	fd_ebadf (EV_P)	1052	fd_ebadf (EV_P)
451	{	1053	{
452	int fd;	1054	int fd;
453		1055
454	for (fd = 0; fd < anfdmax; ++fd)	1056	for (fd = 0; fd < anfdmax; ++fd)
455	if (anfds [fd].events)	1057	if (anfds [fd].events)
456	if (!fd_valid (fd) == -1 && errno == EBADF)	1058	if (!fd_valid (fd) && errno == EBADF)
457	fd_kill (EV_A_ fd);	1059	fd_kill (EV_A_ fd);
458	}	1060	}
459		1061
460	/* called on ENOMEM in select/poll to kill some fds and retry */	1062	/* called on ENOMEM in select/poll to kill some fds and retry */
461	static void	1063	static void noinline
462	fd_enomem (EV_P)	1064	fd_enomem (EV_P)
463	{	1065	{
464	int fd;	1066	int fd;
465		1067
466	for (fd = anfdmax; fd--; )	1068	for (fd = anfdmax; fd--; )
467	if (anfds [fd].events)	1069	if (anfds [fd].events)
468	{	1070	{
469	fd_kill (EV_A_ fd);	1071	fd_kill (EV_A_ fd);
470	return;	1072	break;
471	}	1073	}
472	}	1074	}
473		1075
474	/* usually called after fork if method needs to re-arm all fds from scratch */	1076	/* usually called after fork if backend needs to re-arm all fds from scratch */
475	static void	1077	static void noinline
476	fd_rearm_all (EV_P)	1078	fd_rearm_all (EV_P)
477	{	1079	{
478	int fd;	1080	int fd;
479		1081
480	/* this should be highly optimised to not do anything but set a flag */
481	for (fd = 0; fd < anfdmax; ++fd)	1082	for (fd = 0; fd < anfdmax; ++fd)
482	if (anfds [fd].events)	1083	if (anfds [fd].events)
483	{	1084	{
484	anfds [fd].events = 0;	1085	anfds [fd].events = 0;
485	fd_change (EV_A_ fd);	1086	anfds [fd].emask = 0;
		1087	fd_change (EV_A_ fd, EV__IOFDSET \| EV_ANFD_REIFY);
486	}	1088	}
487	}	1089	}
488		1090
		1091	/* used to prepare libev internal fd's */
		1092	/* this is not fork-safe */
		1093	inline_speed void
		1094	fd_intern (int fd)
		1095	{
		1096	#ifdef _WIN32
		1097	unsigned long arg = 1;
		1098	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
		1099	#else
		1100	fcntl (fd, F_SETFD, FD_CLOEXEC);
		1101	fcntl (fd, F_SETFL, O_NONBLOCK);
		1102	#endif
		1103	}
		1104
489	/*****************************************************************************/	1105	/*****************************************************************************/
490		1106
		1107	/*
		1108	* the heap functions want a real array index. array index 0 is guaranteed to not
		1109	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		1110	* the branching factor of the d-tree.
		1111	*/
		1112
		1113	/*
		1114	* at the moment we allow libev the luxury of two heaps,
		1115	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		1116	* which is more cache-efficient.
		1117	* the difference is about 5% with 50000+ watchers.
		1118	*/
		1119	#if EV_USE_4HEAP
		1120
		1121	#define DHEAP 4
		1122	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		1123	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		1124	#define UPHEAP_DONE(p,k) ((p) == (k))
		1125
		1126	/* away from the root */
		1127	inline_speed void
		1128	downheap (ANHE *heap, int N, int k)
		1129	{
		1130	ANHE he = heap [k];
		1131	ANHE *E = heap + N + HEAP0;
		1132
		1133	for (;;)
		1134	{
		1135	ev_tstamp minat;
		1136	ANHE *minpos;
		1137	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0 + 1;
		1138
		1139	/* find minimum child */
		1140	if (expect_true (pos + DHEAP - 1 < E))
		1141	{
		1142	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		1143	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1144	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1145	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1146	}
		1147	else if (pos < E)
		1148	{
		1149	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		1150	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1151	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1152	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1153	}
		1154	else
		1155	break;
		1156
		1157	if (ANHE_at (he) <= minat)
		1158	break;
		1159
		1160	heap [k] = *minpos;
		1161	ev_active (ANHE_w (*minpos)) = k;
		1162
		1163	k = minpos - heap;
		1164	}
		1165
		1166	heap [k] = he;
		1167	ev_active (ANHE_w (he)) = k;
		1168	}
		1169
		1170	#else /* 4HEAP */
		1171
		1172	#define HEAP0 1
		1173	#define HPARENT(k) ((k) >> 1)
		1174	#define UPHEAP_DONE(p,k) (!(p))
		1175
		1176	/* away from the root */
		1177	inline_speed void
		1178	downheap (ANHE *heap, int N, int k)
		1179	{
		1180	ANHE he = heap [k];
		1181
		1182	for (;;)
		1183	{
		1184	int c = k << 1;
		1185
		1186	if (c >= N + HEAP0)
		1187	break;
		1188
		1189	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		1190	? 1 : 0;
		1191
		1192	if (ANHE_at (he) <= ANHE_at (heap [c]))
		1193	break;
		1194
		1195	heap [k] = heap [c];
		1196	ev_active (ANHE_w (heap [k])) = k;
		1197
		1198	k = c;
		1199	}
		1200
		1201	heap [k] = he;
		1202	ev_active (ANHE_w (he)) = k;
		1203	}
		1204	#endif
		1205
		1206	/* towards the root */
		1207	inline_speed void
		1208	upheap (ANHE *heap, int k)
		1209	{
		1210	ANHE he = heap [k];
		1211
		1212	for (;;)
		1213	{
		1214	int p = HPARENT (k);
		1215
		1216	if (UPHEAP_DONE (p, k) \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		1217	break;
		1218
		1219	heap [k] = heap [p];
		1220	ev_active (ANHE_w (heap [k])) = k;
		1221	k = p;
		1222	}
		1223
		1224	heap [k] = he;
		1225	ev_active (ANHE_w (he)) = k;
		1226	}
		1227
		1228	/* move an element suitably so it is in a correct place */
		1229	inline_size void
		1230	adjustheap (ANHE *heap, int N, int k)
		1231	{
		1232	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
		1233	upheap (heap, k);
		1234	else
		1235	downheap (heap, N, k);
		1236	}
		1237
		1238	/* rebuild the heap: this function is used only once and executed rarely */
		1239	inline_size void
		1240	reheap (ANHE *heap, int N)
		1241	{
		1242	int i;
		1243
		1244	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		1245	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		1246	for (i = 0; i < N; ++i)
		1247	upheap (heap, i + HEAP0);
		1248	}
		1249
		1250	/*****************************************************************************/
		1251
		1252	/* associate signal watchers to a signal signal */
		1253	typedef struct
		1254	{
		1255	EV_ATOMIC_T pending;
		1256	#if EV_MULTIPLICITY
		1257	EV_P;
		1258	#endif
		1259	WL head;
		1260	} ANSIG;
		1261
		1262	static ANSIG signals [EV_NSIG - 1];
		1263
		1264	/*****************************************************************************/
		1265
		1266	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
		1267
		1268	static void noinline
		1269	evpipe_init (EV_P)
		1270	{
		1271	if (!ev_is_active (&pipe_w))
		1272	{
		1273	# if EV_USE_EVENTFD
		1274	evfd = eventfd (0, EFD_NONBLOCK \| EFD_CLOEXEC);
		1275	if (evfd < 0 && errno == EINVAL)
		1276	evfd = eventfd (0, 0);
		1277
		1278	if (evfd >= 0)
		1279	{
		1280	evpipe [0] = -1;
		1281	fd_intern (evfd); /* doing it twice doesn't hurt */
		1282	ev_io_set (&pipe_w, evfd, EV_READ);
		1283	}
		1284	else
		1285	# endif
		1286	{
		1287	while (pipe (evpipe))
		1288	ev_syserr ("(libev) error creating signal/async pipe");
		1289
		1290	fd_intern (evpipe [0]);
		1291	fd_intern (evpipe [1]);
		1292	ev_io_set (&pipe_w, evpipe [0], EV_READ);
		1293	}
		1294
		1295	ev_io_start (EV_A_ &pipe_w);
		1296	ev_unref (EV_A); /* watcher should not keep loop alive */
		1297	}
		1298	}
		1299
		1300	inline_size void
		1301	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1302	{
		1303	if (!*flag)
		1304	{
		1305	int old_errno = errno; /* save errno because write might clobber it */
		1306	char dummy;
		1307
		1308	*flag = 1;
		1309
		1310	#if EV_USE_EVENTFD
		1311	if (evfd >= 0)
		1312	{
		1313	uint64_t counter = 1;
		1314	write (evfd, &counter, sizeof (uint64_t));
		1315	}
		1316	else
		1317	#endif
		1318	/* win32 people keep sending patches that change this write() to send() */
		1319	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1320	/* so when you think this write should be a send instead, please find out */
		1321	/* where your send() is from - it's definitely not the microsoft send, and */
		1322	/* tell me. thank you. */
		1323	write (evpipe [1], &dummy, 1);
		1324
		1325	errno = old_errno;
		1326	}
		1327	}
		1328
		1329	/* called whenever the libev signal pipe */
		1330	/* got some events (signal, async) */
491	static void	1331	static void
492	upheap (WT *heap, int k)	1332	pipecb (EV_P_ ev_io *iow, int revents)
493	{	1333	{
494	WT w = heap [k];	1334	int i;
495		1335
496	while (k && heap [k >> 1]->at > w->at)	1336	#if EV_USE_EVENTFD
497	{	1337	if (evfd >= 0)
498	heap [k] = heap [k >> 1];
499	((W)heap [k])->active = k + 1;
500	k >>= 1;
501	}	1338	{
		1339	uint64_t counter;
		1340	read (evfd, &counter, sizeof (uint64_t));
		1341	}
		1342	else
		1343	#endif
		1344	{
		1345	char dummy;
		1346	/* see discussion in evpipe_write when you think this read should be recv in win32 */
		1347	read (evpipe [0], &dummy, 1);
		1348	}
502		1349
503	heap [k] = w;	1350	if (sig_pending)
504	((W)heap [k])->active = k + 1;	1351	{
		1352	sig_pending = 0;
505		1353
		1354	for (i = EV_NSIG - 1; i--; )
		1355	if (expect_false (signals [i].pending))
		1356	ev_feed_signal_event (EV_A_ i + 1);
		1357	}
		1358
		1359	#if EV_ASYNC_ENABLE
		1360	if (async_pending)
		1361	{
		1362	async_pending = 0;
		1363
		1364	for (i = asynccnt; i--; )
		1365	if (asyncs [i]->sent)
		1366	{
		1367	asyncs [i]->sent = 0;
		1368	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1369	}
		1370	}
		1371	#endif
506	}	1372	}
		1373
		1374	/*****************************************************************************/
507		1375
508	static void	1376	static void
509	downheap (WT *heap, int N, int k)
510	{
511	WT w = heap [k];
512
513	while (k < (N >> 1))
514	{
515	int j = k << 1;
516
517	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
518	++j;
519
520	if (w->at <= heap [j]->at)
521	break;
522
523	heap [k] = heap [j];
524	((W)heap [k])->active = k + 1;
525	k = j;
526	}
527
528	heap [k] = w;
529	((W)heap [k])->active = k + 1;
530	}
531
532	inline void
533	adjustheap (WT *heap, int N, int k, ev_tstamp at)
534	{
535	ev_tstamp old_at = heap [k]->at;
536	heap [k]->at = at;
537
538	if (old_at < at)
539	downheap (heap, N, k);
540	else
541	upheap (heap, k);
542	}
543
544	/*****************************************************************************/
545
546	typedef struct
547	{
548	WL head;
549	sig_atomic_t volatile gotsig;
550	} ANSIG;
551
552	static ANSIG *signals;
553	static int signalmax;
554
555	static int sigpipe [2];
556	static sig_atomic_t volatile gotsig;
557	static struct ev_io sigev;
558
559	static void
560	signals_init (ANSIG *base, int count)
561	{
562	while (count--)
563	{
564	base->head = 0;
565	base->gotsig = 0;
566
567	++base;
568	}
569	}
570
571	static void
572	sighandler (int signum)	1377	ev_sighandler (int signum)
573	{	1378	{
574	#if WIN32	1379	#if EV_MULTIPLICITY
575	signal (signum, sighandler);	1380	EV_P = signals [signum - 1].loop;
576	#endif	1381	#endif
577		1382
578	signals [signum - 1].gotsig = 1;
579
580	if (!gotsig)
581	{
582	int old_errno = errno;
583	gotsig = 1;
584	#ifdef WIN32	1383	#ifdef _WIN32
585	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);	1384	signal (signum, ev_sighandler);
586	#else
587	write (sigpipe [1], &signum, 1);
588	#endif	1385	#endif
589	errno = old_errno;
590	}
591	}
592		1386
593	void	1387	signals [signum - 1].pending = 1;
		1388	evpipe_write (EV_A_ &sig_pending);
		1389	}
		1390
		1391	void noinline
594	ev_feed_signal_event (EV_P_ int signum)	1392	ev_feed_signal_event (EV_P_ int signum)
595	{	1393	{
596	WL w;	1394	WL w;
597		1395
		1396	if (expect_false (signum <= 0 \|\| signum > EV_NSIG))
		1397	return;
		1398
		1399	--signum;
		1400
598	#if EV_MULTIPLICITY	1401	#if EV_MULTIPLICITY
599	assert (("feeding signal events is only supported in the default loop", loop == default_loop));	1402	/* it is permissible to try to feed a signal to the wrong loop */
600	#endif	1403	/* or, likely more useful, feeding a signal nobody is waiting for */
601		1404
602	--signum;	1405	if (expect_false (signals [signum].loop != EV_A))
603
604	if (signum < 0 \|\| signum >= signalmax)
605	return;	1406	return;
		1407	#endif
606		1408
607	signals [signum].gotsig = 0;	1409	signals [signum].pending = 0;
608		1410
609	for (w = signals [signum].head; w; w = w->next)	1411	for (w = signals [signum].head; w; w = w->next)
610	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1412	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
611	}	1413	}
612		1414
		1415	#if EV_USE_SIGNALFD
613	static void	1416	static void
614	sigcb (EV_P_ struct ev_io *iow, int revents)	1417	sigfdcb (EV_P_ ev_io *iow, int revents)
615	{	1418	{
616	int signum;	1419	struct signalfd_siginfo si[2], sip; / these structs are big */
617		1420
618	#ifdef WIN32	1421	for (;;)
619	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);	1422	{
620	#else	1423	ssize_t res = read (sigfd, si, sizeof (si));
621	read (sigpipe [0], &revents, 1);
622	#endif
623	gotsig = 0;
624		1424
625	for (signum = signalmax; signum--; )	1425	/* not ISO-C, as res might be -1, but works with SuS */
626	if (signals [signum].gotsig)	1426	for (sip = si; (char )sip < (char )si + res; ++sip)
627	ev_feed_signal_event (EV_A_ signum + 1);	1427	ev_feed_signal_event (EV_A_ sip->ssi_signo);
628	}
629		1428
630	static void	1429	if (res < (ssize_t)sizeof (si))
631	siginit (EV_P)	1430	break;
632	{	1431	}
633	#ifndef WIN32
634	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
635	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
636
637	/* rather than sort out wether we really need nb, set it */
638	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
639	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
640	#endif
641
642	ev_io_set (&sigev, sigpipe [0], EV_READ);
643	ev_io_start (EV_A_ &sigev);
644	ev_unref (EV_A); /* child watcher should not keep loop alive */
645	}	1432	}
		1433	#endif
		1434
		1435	#endif
646		1436
647	/*****************************************************************************/	1437	/*****************************************************************************/
648		1438
649	static struct ev_child *childs [PID_HASHSIZE];	1439	#if EV_CHILD_ENABLE
		1440	static WL childs [EV_PID_HASHSIZE];
650		1441
651	#ifndef WIN32
652
653	static struct ev_signal childev;	1442	static ev_signal childev;
		1443
		1444	#ifndef WIFCONTINUED
		1445	# define WIFCONTINUED(status) 0
		1446	#endif
		1447
		1448	/* handle a single child status event */
		1449	inline_speed void
		1450	child_reap (EV_P_ int chain, int pid, int status)
		1451	{
		1452	ev_child *w;
		1453	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
		1454
		1455	for (w = (ev_child )childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child )((WL)w)->next)
		1456	{
		1457	if ((w->pid == pid \|\| !w->pid)
		1458	&& (!traced \|\| (w->flags & 1)))
		1459	{
		1460	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
		1461	w->rpid = pid;
		1462	w->rstatus = status;
		1463	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1464	}
		1465	}
		1466	}
654		1467
655	#ifndef WCONTINUED	1468	#ifndef WCONTINUED
656	# define WCONTINUED 0	1469	# define WCONTINUED 0
657	#endif	1470	#endif
658		1471
		1472	/* called on sigchld etc., calls waitpid */
659	static void	1473	static void
660	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
661	{
662	struct ev_child *w;
663
664	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
665	if (w->pid == pid \|\| !w->pid)
666	{
667	ev_priority (w) = ev_priority (sw); /* need to do it now */
668	w->rpid = pid;
669	w->rstatus = status;
670	ev_feed_event (EV_A_ (W)w, EV_CHILD);
671	}
672	}
673
674	static void
675	childcb (EV_P_ struct ev_signal *sw, int revents)	1474	childcb (EV_P_ ev_signal *sw, int revents)
676	{	1475	{
677	int pid, status;	1476	int pid, status;
678		1477
		1478	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
679	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))	1479	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
680	{	1480	if (!WCONTINUED
		1481	\|\| errno != EINVAL
		1482	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
		1483	return;
		1484
681	/* make sure we are called again until all childs have been reaped */	1485	/* make sure we are called again until all children have been reaped */
		1486	/* we need to do it this way so that the callback gets called before we continue */
682	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1487	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
683		1488
684	child_reap (EV_A_ sw, pid, pid, status);	1489	child_reap (EV_A_ pid, pid, status);
		1490	if ((EV_PID_HASHSIZE) > 1)
685	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1491	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
686	}
687	}	1492	}
688		1493
689	#endif	1494	#endif
690		1495
691	/*****************************************************************************/	1496	/*****************************************************************************/
692		1497
		1498	#if EV_USE_IOCP
		1499	# include "ev_iocp.c"
		1500	#endif
		1501	#if EV_USE_PORT
		1502	# include "ev_port.c"
		1503	#endif
693	#if EV_USE_KQUEUE	1504	#if EV_USE_KQUEUE
694	# include "ev_kqueue.c"	1505	# include "ev_kqueue.c"
695	#endif	1506	#endif
696	#if EV_USE_EPOLL	1507	#if EV_USE_EPOLL
697	# include "ev_epoll.c"	1508	# include "ev_epoll.c"
…		…
714	{	1525	{
715	return EV_VERSION_MINOR;	1526	return EV_VERSION_MINOR;
716	}	1527	}
717		1528
718	/* return true if we are running with elevated privileges and should ignore env variables */	1529	/* return true if we are running with elevated privileges and should ignore env variables */
719	static int	1530	int inline_size
720	enable_secure (void)	1531	enable_secure (void)
721	{	1532	{
722	#ifdef WIN32	1533	#ifdef _WIN32
723	return 0;	1534	return 0;
724	#else	1535	#else
725	return getuid () != geteuid ()	1536	return getuid () != geteuid ()
726	\|\| getgid () != getegid ();	1537	\|\| getgid () != getegid ();
727	#endif	1538	#endif
728	}	1539	}
729		1540
730	int	1541	unsigned int
		1542	ev_supported_backends (void)
		1543	{
		1544	unsigned int flags = 0;
		1545
		1546	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		1547	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		1548	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		1549	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		1550	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		1551
		1552	return flags;
		1553	}
		1554
		1555	unsigned int
		1556	ev_recommended_backends (void)
		1557	{
		1558	unsigned int flags = ev_supported_backends ();
		1559
		1560	#ifndef __NetBSD__
		1561	/* kqueue is borked on everything but netbsd apparently */
		1562	/* it usually doesn't work correctly on anything but sockets and pipes */
		1563	flags &= ~EVBACKEND_KQUEUE;
		1564	#endif
		1565	#ifdef __APPLE__
		1566	/* only select works correctly on that "unix-certified" platform */
		1567	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1568	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		1569	#endif
		1570	#ifdef __FreeBSD__
		1571	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
		1572	#endif
		1573
		1574	return flags;
		1575	}
		1576
		1577	unsigned int
		1578	ev_embeddable_backends (void)
		1579	{
		1580	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
		1581
		1582	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1583	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
		1584	flags &= ~EVBACKEND_EPOLL;
		1585
		1586	return flags;
		1587	}
		1588
		1589	unsigned int
		1590	ev_backend (EV_P)
		1591	{
		1592	return backend;
		1593	}
		1594
		1595	#if EV_FEATURE_API
		1596	unsigned int
		1597	ev_iteration (EV_P)
		1598	{
		1599	return loop_count;
		1600	}
		1601
		1602	unsigned int
731	ev_method (EV_P)	1603	ev_depth (EV_P)
732	{	1604	{
733	return method;	1605	return loop_depth;
734	}	1606	}
735		1607
736	static void	1608	void
737	loop_init (EV_P_ int methods)	1609	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
738	{	1610	{
739	if (!method)	1611	io_blocktime = interval;
		1612	}
		1613
		1614	void
		1615	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1616	{
		1617	timeout_blocktime = interval;
		1618	}
		1619
		1620	void
		1621	ev_set_userdata (EV_P_ void *data)
		1622	{
		1623	userdata = data;
		1624	}
		1625
		1626	void *
		1627	ev_userdata (EV_P)
		1628	{
		1629	return userdata;
		1630	}
		1631
		1632	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1633	{
		1634	invoke_cb = invoke_pending_cb;
		1635	}
		1636
		1637	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
		1638	{
		1639	release_cb = release;
		1640	acquire_cb = acquire;
		1641	}
		1642	#endif
		1643
		1644	/* initialise a loop structure, must be zero-initialised */
		1645	static void noinline
		1646	loop_init (EV_P_ unsigned int flags)
		1647	{
		1648	if (!backend)
740	{	1649	{
		1650	#if EV_USE_REALTIME
		1651	if (!have_realtime)
		1652	{
		1653	struct timespec ts;
		1654
		1655	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1656	have_realtime = 1;
		1657	}
		1658	#endif
		1659
741	#if EV_USE_MONOTONIC	1660	#if EV_USE_MONOTONIC
		1661	if (!have_monotonic)
		1662	{
		1663	struct timespec ts;
		1664
		1665	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1666	have_monotonic = 1;
		1667	}
		1668	#endif
		1669
		1670	/* pid check not overridable via env */
		1671	#ifndef _WIN32
		1672	if (flags & EVFLAG_FORKCHECK)
		1673	curpid = getpid ();
		1674	#endif
		1675
		1676	if (!(flags & EVFLAG_NOENV)
		1677	&& !enable_secure ()
		1678	&& getenv ("LIBEV_FLAGS"))
		1679	flags = atoi (getenv ("LIBEV_FLAGS"));
		1680
		1681	ev_rt_now = ev_time ();
		1682	mn_now = get_clock ();
		1683	now_floor = mn_now;
		1684	rtmn_diff = ev_rt_now - mn_now;
		1685	#if EV_FEATURE_API
		1686	invoke_cb = ev_invoke_pending;
		1687	#endif
		1688
		1689	io_blocktime = 0.;
		1690	timeout_blocktime = 0.;
		1691	backend = 0;
		1692	backend_fd = -1;
		1693	sig_pending = 0;
		1694	#if EV_ASYNC_ENABLE
		1695	async_pending = 0;
		1696	#endif
		1697	#if EV_USE_INOTIFY
		1698	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
		1699	#endif
		1700	#if EV_USE_SIGNALFD
		1701	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
		1702	#endif
		1703
		1704	if (!(flags & 0x0000ffffU))
		1705	flags \|= ev_recommended_backends ();
		1706
		1707	#if EV_USE_IOCP
		1708	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1709	#endif
		1710	#if EV_USE_PORT
		1711	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1712	#endif
		1713	#if EV_USE_KQUEUE
		1714	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1715	#endif
		1716	#if EV_USE_EPOLL
		1717	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1718	#endif
		1719	#if EV_USE_POLL
		1720	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1721	#endif
		1722	#if EV_USE_SELECT
		1723	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1724	#endif
		1725
		1726	ev_prepare_init (&pending_w, pendingcb);
		1727
		1728	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
		1729	ev_init (&pipe_w, pipecb);
		1730	ev_set_priority (&pipe_w, EV_MAXPRI);
		1731	#endif
		1732	}
		1733	}
		1734
		1735	/* free up a loop structure */
		1736	void
		1737	ev_loop_destroy (EV_P)
		1738	{
		1739	int i;
		1740
		1741	#if EV_CLEANUP_ENABLE
		1742	/* queue cleanup watchers (and execute them) */
		1743	if (expect_false (cleanupcnt))
		1744	{
		1745	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1746	EV_INVOKE_PENDING;
		1747	}
		1748	#endif
		1749
		1750	#if EV_CHILD_ENABLE
		1751	if (ev_is_active (&childev))
		1752	{
		1753	ev_ref (EV_A); /* child watcher */
		1754	ev_signal_stop (EV_A_ &childev);
		1755	}
		1756	#endif
		1757
		1758	if (ev_is_active (&pipe_w))
		1759	{
		1760	/ev_ref (EV_A);/
		1761	/ev_io_stop (EV_A_ &pipe_w);/
		1762
		1763	#if EV_USE_EVENTFD
		1764	if (evfd >= 0)
		1765	close (evfd);
		1766	#endif
		1767
		1768	if (evpipe [0] >= 0)
		1769	{
		1770	EV_WIN32_CLOSE_FD (evpipe [0]);
		1771	EV_WIN32_CLOSE_FD (evpipe [1]);
		1772	}
		1773	}
		1774
		1775	#if EV_USE_SIGNALFD
		1776	if (ev_is_active (&sigfd_w))
		1777	close (sigfd);
		1778	#endif
		1779
		1780	#if EV_USE_INOTIFY
		1781	if (fs_fd >= 0)
		1782	close (fs_fd);
		1783	#endif
		1784
		1785	if (backend_fd >= 0)
		1786	close (backend_fd);
		1787
		1788	#if EV_USE_IOCP
		1789	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1790	#endif
		1791	#if EV_USE_PORT
		1792	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1793	#endif
		1794	#if EV_USE_KQUEUE
		1795	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1796	#endif
		1797	#if EV_USE_EPOLL
		1798	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1799	#endif
		1800	#if EV_USE_POLL
		1801	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1802	#endif
		1803	#if EV_USE_SELECT
		1804	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1805	#endif
		1806
		1807	for (i = NUMPRI; i--; )
		1808	{
		1809	array_free (pending, [i]);
		1810	#if EV_IDLE_ENABLE
		1811	array_free (idle, [i]);
		1812	#endif
		1813	}
		1814
		1815	ev_free (anfds); anfds = 0; anfdmax = 0;
		1816
		1817	/* have to use the microsoft-never-gets-it-right macro */
		1818	array_free (rfeed, EMPTY);
		1819	array_free (fdchange, EMPTY);
		1820	array_free (timer, EMPTY);
		1821	#if EV_PERIODIC_ENABLE
		1822	array_free (periodic, EMPTY);
		1823	#endif
		1824	#if EV_FORK_ENABLE
		1825	array_free (fork, EMPTY);
		1826	#endif
		1827	#if EV_CLEANUP_ENABLE
		1828	array_free (cleanup, EMPTY);
		1829	#endif
		1830	array_free (prepare, EMPTY);
		1831	array_free (check, EMPTY);
		1832	#if EV_ASYNC_ENABLE
		1833	array_free (async, EMPTY);
		1834	#endif
		1835
		1836	backend = 0;
		1837
		1838	#if EV_MULTIPLICITY
		1839	if (ev_is_default_loop (EV_A))
		1840	#endif
		1841	ev_default_loop_ptr = 0;
		1842	#if EV_MULTIPLICITY
		1843	else
		1844	ev_free (EV_A);
		1845	#endif
		1846	}
		1847
		1848	#if EV_USE_INOTIFY
		1849	inline_size void infy_fork (EV_P);
		1850	#endif
		1851
		1852	inline_size void
		1853	loop_fork (EV_P)
		1854	{
		1855	#if EV_USE_PORT
		1856	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1857	#endif
		1858	#if EV_USE_KQUEUE
		1859	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1860	#endif
		1861	#if EV_USE_EPOLL
		1862	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1863	#endif
		1864	#if EV_USE_INOTIFY
		1865	infy_fork (EV_A);
		1866	#endif
		1867
		1868	if (ev_is_active (&pipe_w))
		1869	{
		1870	/* this "locks" the handlers against writing to the pipe */
		1871	/* while we modify the fd vars */
		1872	sig_pending = 1;
		1873	#if EV_ASYNC_ENABLE
		1874	async_pending = 1;
		1875	#endif
		1876
		1877	ev_ref (EV_A);
		1878	ev_io_stop (EV_A_ &pipe_w);
		1879
		1880	#if EV_USE_EVENTFD
		1881	if (evfd >= 0)
		1882	close (evfd);
		1883	#endif
		1884
		1885	if (evpipe [0] >= 0)
		1886	{
		1887	EV_WIN32_CLOSE_FD (evpipe [0]);
		1888	EV_WIN32_CLOSE_FD (evpipe [1]);
		1889	}
		1890
		1891	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
		1892	evpipe_init (EV_A);
		1893	/* now iterate over everything, in case we missed something */
		1894	pipecb (EV_A_ &pipe_w, EV_READ);
		1895	#endif
		1896	}
		1897
		1898	postfork = 0;
		1899	}
		1900
		1901	#if EV_MULTIPLICITY
		1902
		1903	struct ev_loop *
		1904	ev_loop_new (unsigned int flags)
		1905	{
		1906	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1907
		1908	memset (EV_A, 0, sizeof (struct ev_loop));
		1909	loop_init (EV_A_ flags);
		1910
		1911	if (ev_backend (EV_A))
		1912	return EV_A;
		1913
		1914	ev_free (EV_A);
		1915	return 0;
		1916	}
		1917
		1918	#endif /* multiplicity */
		1919
		1920	#if EV_VERIFY
		1921	static void noinline
		1922	verify_watcher (EV_P_ W w)
		1923	{
		1924	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1925
		1926	if (w->pending)
		1927	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1928	}
		1929
		1930	static void noinline
		1931	verify_heap (EV_P_ ANHE *heap, int N)
		1932	{
		1933	int i;
		1934
		1935	for (i = HEAP0; i < N + HEAP0; ++i)
		1936	{
		1937	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1938	assert (("libev: heap condition violated", i == HEAP0 \|\| ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1939	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1940
		1941	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1942	}
		1943	}
		1944
		1945	static void noinline
		1946	array_verify (EV_P_ W *ws, int cnt)
		1947	{
		1948	while (cnt--)
		1949	{
		1950	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1951	verify_watcher (EV_A_ ws [cnt]);
		1952	}
		1953	}
		1954	#endif
		1955
		1956	#if EV_FEATURE_API
		1957	void
		1958	ev_verify (EV_P)
		1959	{
		1960	#if EV_VERIFY
		1961	int i;
		1962	WL w;
		1963
		1964	assert (activecnt >= -1);
		1965
		1966	assert (fdchangemax >= fdchangecnt);
		1967	for (i = 0; i < fdchangecnt; ++i)
		1968	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		1969
		1970	assert (anfdmax >= 0);
		1971	for (i = 0; i < anfdmax; ++i)
		1972	for (w = anfds [i].head; w; w = w->next)
742	{	1973	{
743	struct timespec ts;	1974	verify_watcher (EV_A_ (W)w);
744	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1975	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
745	have_monotonic = 1;	1976	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
746	}	1977	}
747	#endif
748		1978
749	ev_rt_now = ev_time ();	1979	assert (timermax >= timercnt);
750	mn_now = get_clock ();	1980	verify_heap (EV_A_ timers, timercnt);
751	now_floor = mn_now;
752	rtmn_diff = ev_rt_now - mn_now;
753		1981
754	if (methods == EVMETHOD_AUTO)	1982	#if EV_PERIODIC_ENABLE
755	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1983	assert (periodicmax >= periodiccnt);
756	methods = atoi (getenv ("LIBEV_METHODS"));	1984	verify_heap (EV_A_ periodics, periodiccnt);
757	else
758	methods = EVMETHOD_ANY;
759
760	method = 0;
761	#if EV_USE_WIN32
762	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
763	#endif
764	#if EV_USE_KQUEUE
765	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
766	#endif
767	#if EV_USE_EPOLL
768	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
769	#endif
770	#if EV_USE_POLL
771	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
772	#endif
773	#if EV_USE_SELECT
774	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
775	#endif
776
777	ev_init (&sigev, sigcb);
778	ev_set_priority (&sigev, EV_MAXPRI);
779	}
780	}
781
782	void
783	loop_destroy (EV_P)
784	{
785	int i;
786
787	#if EV_USE_WIN32
788	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
789	#endif
790	#if EV_USE_KQUEUE
791	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
792	#endif
793	#if EV_USE_EPOLL
794	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
795	#endif
796	#if EV_USE_POLL
797	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
798	#endif
799	#if EV_USE_SELECT
800	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
801	#endif	1985	#endif
802		1986
803	for (i = NUMPRI; i--; )	1987	for (i = NUMPRI; i--; )
804	array_free (pending, [i]);	1988	{
		1989	assert (pendingmax [i] >= pendingcnt [i]);
		1990	#if EV_IDLE_ENABLE
		1991	assert (idleall >= 0);
		1992	assert (idlemax [i] >= idlecnt [i]);
		1993	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1994	#endif
		1995	}
805		1996
806	/* have to use the microsoft-never-gets-it-right macro */	1997	#if EV_FORK_ENABLE
807	array_free_microshit (fdchange);	1998	assert (forkmax >= forkcnt);
808	array_free_microshit (timer);	1999	array_verify (EV_A_ (W *)forks, forkcnt);
809	array_free_microshit (periodic);	2000	#endif
810	array_free_microshit (idle);
811	array_free_microshit (prepare);
812	array_free_microshit (check);
813		2001
814	method = 0;	2002	#if EV_CLEANUP_ENABLE
815	}	2003	assert (cleanupmax >= cleanupcnt);
		2004	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2005	#endif
816		2006
817	static void	2007	#if EV_ASYNC_ENABLE
818	loop_fork (EV_P)	2008	assert (asyncmax >= asynccnt);
819	{	2009	array_verify (EV_A_ (W *)asyncs, asynccnt);
820	#if EV_USE_EPOLL	2010	#endif
821	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	2011
		2012	#if EV_PREPARE_ENABLE
		2013	assert (preparemax >= preparecnt);
		2014	array_verify (EV_A_ (W *)prepares, preparecnt);
		2015	#endif
		2016
		2017	#if EV_CHECK_ENABLE
		2018	assert (checkmax >= checkcnt);
		2019	array_verify (EV_A_ (W *)checks, checkcnt);
		2020	#endif
		2021
		2022	# if 0
		2023	#if EV_CHILD_ENABLE
		2024	for (w = (ev_child )childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child )((WL)w)->next)
		2025	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		2026	#endif
822	#endif	2027	# endif
823	#if EV_USE_KQUEUE
824	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
825	#endif	2028	#endif
826
827	if (ev_is_active (&sigev))
828	{
829	/* default loop */
830
831	ev_ref (EV_A);
832	ev_io_stop (EV_A_ &sigev);
833	close (sigpipe [0]);
834	close (sigpipe [1]);
835
836	while (pipe (sigpipe))
837	syserr ("(libev) error creating pipe");
838
839	siginit (EV_A);
840	}
841
842	postfork = 0;
843	}	2029	}
844
845	#if EV_MULTIPLICITY
846	struct ev_loop *
847	ev_loop_new (int methods)
848	{
849	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
850
851	memset (loop, 0, sizeof (struct ev_loop));
852
853	loop_init (EV_A_ methods);
854
855	if (ev_method (EV_A))
856	return loop;
857
858	return 0;
859	}
860
861	void
862	ev_loop_destroy (EV_P)
863	{
864	loop_destroy (EV_A);
865	ev_free (loop);
866	}
867
868	void
869	ev_loop_fork (EV_P)
870	{
871	postfork = 1;
872	}
873
874	#endif	2030	#endif
875		2031
876	#if EV_MULTIPLICITY	2032	#if EV_MULTIPLICITY
877	struct ev_loop *	2033	struct ev_loop *
878	#else	2034	#else
879	int	2035	int
880	#endif	2036	#endif
881	ev_default_loop (int methods)	2037	ev_default_loop (unsigned int flags)
882	{	2038	{
883	if (sigpipe [0] == sigpipe [1])
884	if (pipe (sigpipe))
885	return 0;
886
887	if (!default_loop)	2039	if (!ev_default_loop_ptr)
888	{	2040	{
889	#if EV_MULTIPLICITY	2041	#if EV_MULTIPLICITY
890	struct ev_loop *loop = default_loop = &default_loop_struct;	2042	EV_P = ev_default_loop_ptr = &default_loop_struct;
891	#else	2043	#else
892	default_loop = 1;	2044	ev_default_loop_ptr = 1;
893	#endif	2045	#endif
894		2046
895	loop_init (EV_A_ methods);	2047	loop_init (EV_A_ flags);
896		2048
897	if (ev_method (EV_A))	2049	if (ev_backend (EV_A))
898	{	2050	{
899	siginit (EV_A);	2051	#if EV_CHILD_ENABLE
900
901	#ifndef WIN32
902	ev_signal_init (&childev, childcb, SIGCHLD);	2052	ev_signal_init (&childev, childcb, SIGCHLD);
903	ev_set_priority (&childev, EV_MAXPRI);	2053	ev_set_priority (&childev, EV_MAXPRI);
904	ev_signal_start (EV_A_ &childev);	2054	ev_signal_start (EV_A_ &childev);
905	ev_unref (EV_A); /* child watcher should not keep loop alive */	2055	ev_unref (EV_A); /* child watcher should not keep loop alive */
906	#endif	2056	#endif
907	}	2057	}
908	else	2058	else
909	default_loop = 0;	2059	ev_default_loop_ptr = 0;
910	}	2060	}
911		2061
912	return default_loop;	2062	return ev_default_loop_ptr;
913	}	2063	}
914		2064
915	void	2065	void
916	ev_default_destroy (void)	2066	ev_loop_fork (EV_P)
917	{	2067	{
918	#if EV_MULTIPLICITY	2068	postfork = 1; /* must be in line with ev_default_fork */
919	struct ev_loop *loop = default_loop;
920	#endif
921
922	#ifndef WIN32
923	ev_ref (EV_A); /* child watcher */
924	ev_signal_stop (EV_A_ &childev);
925	#endif
926
927	ev_ref (EV_A); /* signal watcher */
928	ev_io_stop (EV_A_ &sigev);
929
930	close (sigpipe [0]); sigpipe [0] = 0;
931	close (sigpipe [1]); sigpipe [1] = 0;
932
933	loop_destroy (EV_A);
934	}
935
936	void
937	ev_default_fork (void)
938	{
939	#if EV_MULTIPLICITY
940	struct ev_loop *loop = default_loop;
941	#endif
942
943	if (method)
944	postfork = 1;
945	}	2069	}
946		2070
947	/*****************************************************************************/	2071	/*****************************************************************************/
948		2072
949	static int	2073	void
950	any_pending (EV_P)	2074	ev_invoke (EV_P_ void *w, int revents)
		2075	{
		2076	EV_CB_INVOKE ((W)w, revents);
		2077	}
		2078
		2079	unsigned int
		2080	ev_pending_count (EV_P)
951	{	2081	{
952	int pri;	2082	int pri;
		2083	unsigned int count = 0;
953		2084
954	for (pri = NUMPRI; pri--; )	2085	for (pri = NUMPRI; pri--; )
955	if (pendingcnt [pri])	2086	count += pendingcnt [pri];
956	return 1;
957		2087
958	return 0;	2088	return count;
959	}	2089	}
960		2090
961	static void	2091	void noinline
962	call_pending (EV_P)	2092	ev_invoke_pending (EV_P)
963	{	2093	{
964	int pri;	2094	int pri;
965		2095
966	for (pri = NUMPRI; pri--; )	2096	for (pri = NUMPRI; pri--; )
967	while (pendingcnt [pri])	2097	while (pendingcnt [pri])
968	{	2098	{
969	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2099	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
970		2100
971	if (p->w)	2101	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
972	{	2102	/* ^ this is no longer true, as pending_w could be here */
		2103
973	p->w->pending = 0;	2104	p->w->pending = 0;
974	EV_CB_INVOKE (p->w, p->events);	2105	EV_CB_INVOKE (p->w, p->events);
975	}	2106	EV_FREQUENT_CHECK;
976	}	2107	}
977	}	2108	}
978		2109
979	static void	2110	#if EV_IDLE_ENABLE
		2111	/* make idle watchers pending. this handles the "call-idle */
		2112	/* only when higher priorities are idle" logic */
		2113	inline_size void
		2114	idle_reify (EV_P)
		2115	{
		2116	if (expect_false (idleall))
		2117	{
		2118	int pri;
		2119
		2120	for (pri = NUMPRI; pri--; )
		2121	{
		2122	if (pendingcnt [pri])
		2123	break;
		2124
		2125	if (idlecnt [pri])
		2126	{
		2127	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		2128	break;
		2129	}
		2130	}
		2131	}
		2132	}
		2133	#endif
		2134
		2135	/* make timers pending */
		2136	inline_size void
980	timers_reify (EV_P)	2137	timers_reify (EV_P)
981	{	2138	{
		2139	EV_FREQUENT_CHECK;
		2140
982	while (timercnt && ((WT)timers [0])->at <= mn_now)	2141	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
983	{	2142	{
984	struct ev_timer *w = timers [0];	2143	do
985
986	assert (("inactive timer on timer heap detected", ev_is_active (w)));
987
988	/* first reschedule or stop timer */
989	if (w->repeat)
990	{	2144	{
		2145	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		2146
		2147	/assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));/
		2148
		2149	/* first reschedule or stop timer */
		2150	if (w->repeat)
		2151	{
		2152	ev_at (w) += w->repeat;
		2153	if (ev_at (w) < mn_now)
		2154	ev_at (w) = mn_now;
		2155
991	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	2156	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
992	((WT)w)->at = mn_now + w->repeat;	2157
		2158	ANHE_at_cache (timers [HEAP0]);
993	downheap ((WT *)timers, timercnt, 0);	2159	downheap (timers, timercnt, HEAP0);
		2160	}
		2161	else
		2162	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2163
		2164	EV_FREQUENT_CHECK;
		2165	feed_reverse (EV_A_ (W)w);
994	}	2166	}
995	else	2167	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
996	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
997		2168
998	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	2169	feed_reverse_done (EV_A_ EV_TIMER);
999	}	2170	}
1000	}	2171	}
1001		2172
1002	static void	2173	#if EV_PERIODIC_ENABLE
		2174	/* make periodics pending */
		2175	inline_size void
1003	periodics_reify (EV_P)	2176	periodics_reify (EV_P)
1004	{	2177	{
		2178	EV_FREQUENT_CHECK;
		2179
1005	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	2180	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1006	{	2181	{
1007	struct ev_periodic *w = periodics [0];	2182	int feed_count = 0;
1008		2183
		2184	do
		2185	{
		2186	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		2187
1009	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	2188	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/
1010		2189
1011	/* first reschedule or stop timer */	2190	/* first reschedule or stop timer */
		2191	if (w->reschedule_cb)
		2192	{
		2193	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2194
		2195	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		2196
		2197	ANHE_at_cache (periodics [HEAP0]);
		2198	downheap (periodics, periodiccnt, HEAP0);
		2199	}
		2200	else if (w->interval)
		2201	{
		2202	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2203	/* if next trigger time is not sufficiently in the future, put it there */
		2204	/* this might happen because of floating point inexactness */
		2205	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2206	{
		2207	ev_at (w) += w->interval;
		2208
		2209	/* if interval is unreasonably low we might still have a time in the past */
		2210	/* so correct this. this will make the periodic very inexact, but the user */
		2211	/* has effectively asked to get triggered more often than possible */
		2212	if (ev_at (w) < ev_rt_now)
		2213	ev_at (w) = ev_rt_now;
		2214	}
		2215
		2216	ANHE_at_cache (periodics [HEAP0]);
		2217	downheap (periodics, periodiccnt, HEAP0);
		2218	}
		2219	else
		2220	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2221
		2222	EV_FREQUENT_CHECK;
		2223	feed_reverse (EV_A_ (W)w);
		2224	}
		2225	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		2226
		2227	feed_reverse_done (EV_A_ EV_PERIODIC);
		2228	}
		2229	}
		2230
		2231	/* simply recalculate all periodics */
		2232	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		2233	static void noinline
		2234	periodics_reschedule (EV_P)
		2235	{
		2236	int i;
		2237
		2238	/* adjust periodics after time jump */
		2239	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		2240	{
		2241	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		2242
1012	if (w->reschedule_cb)	2243	if (w->reschedule_cb)
		2244	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2245	else if (w->interval)
		2246	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2247
		2248	ANHE_at_cache (periodics [i]);
		2249	}
		2250
		2251	reheap (periodics, periodiccnt);
		2252	}
		2253	#endif
		2254
		2255	/* adjust all timers by a given offset */
		2256	static void noinline
		2257	timers_reschedule (EV_P_ ev_tstamp adjust)
		2258	{
		2259	int i;
		2260
		2261	for (i = 0; i < timercnt; ++i)
		2262	{
		2263	ANHE *he = timers + i + HEAP0;
		2264	ANHE_w (*he)->at += adjust;
		2265	ANHE_at_cache (*he);
		2266	}
		2267	}
		2268
		2269	/* fetch new monotonic and realtime times from the kernel */
		2270	/* also detect if there was a timejump, and act accordingly */
		2271	inline_speed void
		2272	time_update (EV_P_ ev_tstamp max_block)
		2273	{
		2274	#if EV_USE_MONOTONIC
		2275	if (expect_true (have_monotonic))
		2276	{
		2277	int i;
		2278	ev_tstamp odiff = rtmn_diff;
		2279
		2280	mn_now = get_clock ();
		2281
		2282	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		2283	/* interpolate in the meantime */
		2284	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1013	{	2285	{
1014	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	2286	ev_rt_now = rtmn_diff + mn_now;
1015		2287	return;
1016	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1017	downheap ((WT *)periodics, periodiccnt, 0);
1018	}	2288	}
1019	else if (w->interval)
1020	{
1021	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1022	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1023	downheap ((WT *)periodics, periodiccnt, 0);
1024	}
1025	else
1026	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1027		2289
1028	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1029	}
1030	}
1031
1032	static void
1033	periodics_reschedule (EV_P)
1034	{
1035	int i;
1036
1037	/* adjust periodics after time jump */
1038	for (i = 0; i < periodiccnt; ++i)
1039	{
1040	struct ev_periodic *w = periodics [i];
1041
1042	if (w->reschedule_cb)
1043	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1044	else if (w->interval)
1045	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1046	}
1047
1048	/* now rebuild the heap */
1049	for (i = periodiccnt >> 1; i--; )
1050	downheap ((WT *)periodics, periodiccnt, i);
1051	}
1052
1053	inline int
1054	time_update_monotonic (EV_P)
1055	{
1056	mn_now = get_clock ();
1057
1058	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059	{
1060	ev_rt_now = rtmn_diff + mn_now;
1061	return 0;
1062	}
1063	else
1064	{
1065	now_floor = mn_now;	2290	now_floor = mn_now;
1066	ev_rt_now = ev_time ();	2291	ev_rt_now = ev_time ();
1067	return 1;
1068	}
1069	}
1070		2292
1071	static void	2293	/* loop a few times, before making important decisions.
1072	time_update (EV_P)	2294	* on the choice of "4": one iteration isn't enough,
1073	{	2295	* in case we get preempted during the calls to
1074	int i;	2296	* ev_time and get_clock. a second call is almost guaranteed
1075		2297	* to succeed in that case, though. and looping a few more times
1076	#if EV_USE_MONOTONIC	2298	* doesn't hurt either as we only do this on time-jumps or
1077	if (expect_true (have_monotonic))	2299	* in the unlikely event of having been preempted here.
1078	{	2300	*/
1079	if (time_update_monotonic (EV_A))	2301	for (i = 4; --i; )
1080	{	2302	{
1081	ev_tstamp odiff = rtmn_diff;
1082
1083	for (i = 4; --i; ) /* loop a few times, before making important decisions */
1084	{
1085	rtmn_diff = ev_rt_now - mn_now;	2303	rtmn_diff = ev_rt_now - mn_now;
1086		2304
1087	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	2305	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1088	return; /* all is well */	2306	return; /* all is well */
1089		2307
1090	ev_rt_now = ev_time ();	2308	ev_rt_now = ev_time ();
1091	mn_now = get_clock ();	2309	mn_now = get_clock ();
1092	now_floor = mn_now;	2310	now_floor = mn_now;
1093	}	2311	}
1094		2312
		2313	/* no timer adjustment, as the monotonic clock doesn't jump */
		2314	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		2315	# if EV_PERIODIC_ENABLE
		2316	periodics_reschedule (EV_A);
		2317	# endif
		2318	}
		2319	else
		2320	#endif
		2321	{
		2322	ev_rt_now = ev_time ();
		2323
		2324	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		2325	{
		2326	/* adjust timers. this is easy, as the offset is the same for all of them */
		2327	timers_reschedule (EV_A_ ev_rt_now - mn_now);
		2328	#if EV_PERIODIC_ENABLE
1095	periodics_reschedule (EV_A);	2329	periodics_reschedule (EV_A);
1096	/* no timer adjustment, as the monotonic clock doesn't jump */	2330	#endif
1097	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1098	}	2331	}
1099	}
1100	else
1101	#endif
1102	{
1103	ev_rt_now = ev_time ();
1104
1105	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1106	{
1107	periodics_reschedule (EV_A);
1108
1109	/* adjust timers. this is easy, as the offset is the same for all */
1110	for (i = 0; i < timercnt; ++i)
1111	((WT)timers [i])->at += ev_rt_now - mn_now;
1112	}
1113		2332
1114	mn_now = ev_rt_now;	2333	mn_now = ev_rt_now;
1115	}	2334	}
1116	}	2335	}
1117		2336
1118	void	2337	void
1119	ev_ref (EV_P)
1120	{
1121	++activecnt;
1122	}
1123
1124	void
1125	ev_unref (EV_P)
1126	{
1127	--activecnt;
1128	}
1129
1130	static int loop_done;
1131
1132	void
1133	ev_loop (EV_P_ int flags)	2338	ev_run (EV_P_ int flags)
1134	{	2339	{
1135	double block;	2340	#if EV_FEATURE_API
1136	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	2341	++loop_depth;
		2342	#endif
		2343
		2344	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
		2345
		2346	loop_done = EVBREAK_CANCEL;
		2347
		2348	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1137		2349
1138	do	2350	do
1139	{	2351	{
		2352	#if EV_VERIFY >= 2
		2353	ev_verify (EV_A);
		2354	#endif
		2355
		2356	#ifndef _WIN32
		2357	if (expect_false (curpid)) /* penalise the forking check even more */
		2358	if (expect_false (getpid () != curpid))
		2359	{
		2360	curpid = getpid ();
		2361	postfork = 1;
		2362	}
		2363	#endif
		2364
		2365	#if EV_FORK_ENABLE
		2366	/* we might have forked, so queue fork handlers */
		2367	if (expect_false (postfork))
		2368	if (forkcnt)
		2369	{
		2370	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		2371	EV_INVOKE_PENDING;
		2372	}
		2373	#endif
		2374
		2375	#if EV_PREPARE_ENABLE
1140	/* queue check watchers (and execute them) */	2376	/* queue prepare watchers (and execute them) */
1141	if (expect_false (preparecnt))	2377	if (expect_false (preparecnt))
1142	{	2378	{
1143	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2379	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1144	call_pending (EV_A);	2380	EV_INVOKE_PENDING;
1145	}	2381	}
		2382	#endif
		2383
		2384	if (expect_false (loop_done))
		2385	break;
1146		2386
1147	/* we might have forked, so reify kernel state if necessary */	2387	/* we might have forked, so reify kernel state if necessary */
1148	if (expect_false (postfork))	2388	if (expect_false (postfork))
1149	loop_fork (EV_A);	2389	loop_fork (EV_A);
1150		2390
1151	/* update fd-related kernel structures */	2391	/* update fd-related kernel structures */
1152	fd_reify (EV_A);	2392	fd_reify (EV_A);
1153		2393
1154	/* calculate blocking time */	2394	/* calculate blocking time */
		2395	{
		2396	ev_tstamp waittime = 0.;
		2397	ev_tstamp sleeptime = 0.;
1155		2398
1156	/* we only need this for !monotonic clock or timers, but as we basically	2399	/* remember old timestamp for io_blocktime calculation */
1157	always have timers, we just calculate it always */	2400	ev_tstamp prev_mn_now = mn_now;
1158	#if EV_USE_MONOTONIC	2401
1159	if (expect_true (have_monotonic))	2402	/* update time to cancel out callback processing overhead */
1160	time_update_monotonic (EV_A);	2403	time_update (EV_A_ 1e100);
1161	else	2404
1162	#endif	2405	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))
1163	{	2406	{
1164	ev_rt_now = ev_time ();
1165	mn_now = ev_rt_now;
1166	}
1167
1168	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
1169	block = 0.;
1170	else
1171	{
1172	block = MAX_BLOCKTIME;	2407	waittime = MAX_BLOCKTIME;
1173		2408
1174	if (timercnt)	2409	if (timercnt)
1175	{	2410	{
1176	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	2411	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1177	if (block > to) block = to;	2412	if (waittime > to) waittime = to;
1178	}	2413	}
1179		2414
		2415	#if EV_PERIODIC_ENABLE
1180	if (periodiccnt)	2416	if (periodiccnt)
1181	{	2417	{
1182	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	2418	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1183	if (block > to) block = to;	2419	if (waittime > to) waittime = to;
1184	}	2420	}
		2421	#endif
1185		2422
1186	if (block < 0.) block = 0.;	2423	/* don't let timeouts decrease the waittime below timeout_blocktime */
		2424	if (expect_false (waittime < timeout_blocktime))
		2425	waittime = timeout_blocktime;
		2426
		2427	/* extra check because io_blocktime is commonly 0 */
		2428	if (expect_false (io_blocktime))
		2429	{
		2430	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2431
		2432	if (sleeptime > waittime - backend_fudge)
		2433	sleeptime = waittime - backend_fudge;
		2434
		2435	if (expect_true (sleeptime > 0.))
		2436	{
		2437	ev_sleep (sleeptime);
		2438	waittime -= sleeptime;
		2439	}
		2440	}
1187	}	2441	}
1188		2442
1189	method_poll (EV_A_ block);	2443	#if EV_FEATURE_API
		2444	++loop_count;
		2445	#endif
		2446	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
		2447	backend_poll (EV_A_ waittime);
		2448	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1190		2449
1191	/* update ev_rt_now, do magic */	2450	/* update ev_rt_now, do magic */
1192	time_update (EV_A);	2451	time_update (EV_A_ waittime + sleeptime);
		2452	}
1193		2453
1194	/* queue pending timers and reschedule them */	2454	/* queue pending timers and reschedule them */
1195	timers_reify (EV_A); /* relative timers called last */	2455	timers_reify (EV_A); /* relative timers called last */
		2456	#if EV_PERIODIC_ENABLE
1196	periodics_reify (EV_A); /* absolute timers called first */	2457	periodics_reify (EV_A); /* absolute timers called first */
		2458	#endif
1197		2459
		2460	#if EV_IDLE_ENABLE
1198	/* queue idle watchers unless io or timers are pending */	2461	/* queue idle watchers unless other events are pending */
1199	if (idlecnt && !any_pending (EV_A))	2462	idle_reify (EV_A);
1200	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2463	#endif
1201		2464
		2465	#if EV_CHECK_ENABLE
1202	/* queue check watchers, to be executed first */	2466	/* queue check watchers, to be executed first */
1203	if (checkcnt)	2467	if (expect_false (checkcnt))
1204	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2468	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2469	#endif
1205		2470
1206	call_pending (EV_A);	2471	EV_INVOKE_PENDING;
1207	}	2472	}
1208	while (activecnt && !loop_done);	2473	while (expect_true (
		2474	activecnt
		2475	&& !loop_done
		2476	&& !(flags & (EVRUN_ONCE \| EVRUN_NOWAIT))
		2477	));
1209		2478
1210	if (loop_done != 2)	2479	if (loop_done == EVBREAK_ONE)
1211	loop_done = 0;	2480	loop_done = EVBREAK_CANCEL;
1212	}
1213		2481
		2482	#if EV_FEATURE_API
		2483	--loop_depth;
		2484	#endif
		2485	}
		2486
1214	void	2487	void
1215	ev_unloop (EV_P_ int how)	2488	ev_break (EV_P_ int how)
1216	{	2489	{
1217	loop_done = how;	2490	loop_done = how;
1218	}	2491	}
1219		2492
		2493	void
		2494	ev_ref (EV_P)
		2495	{
		2496	++activecnt;
		2497	}
		2498
		2499	void
		2500	ev_unref (EV_P)
		2501	{
		2502	--activecnt;
		2503	}
		2504
		2505	void
		2506	ev_now_update (EV_P)
		2507	{
		2508	time_update (EV_A_ 1e100);
		2509	}
		2510
		2511	void
		2512	ev_suspend (EV_P)
		2513	{
		2514	ev_now_update (EV_A);
		2515	}
		2516
		2517	void
		2518	ev_resume (EV_P)
		2519	{
		2520	ev_tstamp mn_prev = mn_now;
		2521
		2522	ev_now_update (EV_A);
		2523	timers_reschedule (EV_A_ mn_now - mn_prev);
		2524	#if EV_PERIODIC_ENABLE
		2525	/* TODO: really do this? */
		2526	periodics_reschedule (EV_A);
		2527	#endif
		2528	}
		2529
1220	/*****************************************************************************/	2530	/*****************************************************************************/
		2531	/* singly-linked list management, used when the expected list length is short */
1221		2532
1222	inline void	2533	inline_size void
1223	wlist_add (WL *head, WL elem)	2534	wlist_add (WL *head, WL elem)
1224	{	2535	{
1225	elem->next = *head;	2536	elem->next = *head;
1226	*head = elem;	2537	*head = elem;
1227	}	2538	}
1228		2539
1229	inline void	2540	inline_size void
1230	wlist_del (WL *head, WL elem)	2541	wlist_del (WL *head, WL elem)
1231	{	2542	{
1232	while (*head)	2543	while (*head)
1233	{	2544	{
1234	if (*head == elem)	2545	if (expect_true (*head == elem))
1235	{	2546	{
1236	*head = elem->next;	2547	*head = elem->next;
1237	return;	2548	break;
1238	}	2549	}
1239		2550
1240	head = &(*head)->next;	2551	head = &(*head)->next;
1241	}	2552	}
1242	}	2553	}
1243		2554
		2555	/* internal, faster, version of ev_clear_pending */
1244	inline void	2556	inline_speed void
1245	ev_clear_pending (EV_P_ W w)	2557	clear_pending (EV_P_ W w)
1246	{	2558	{
1247	if (w->pending)	2559	if (w->pending)
1248	{	2560	{
1249	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2561	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1250	w->pending = 0;	2562	w->pending = 0;
1251	}	2563	}
1252	}	2564	}
1253		2565
		2566	int
		2567	ev_clear_pending (EV_P_ void *w)
		2568	{
		2569	W w_ = (W)w;
		2570	int pending = w_->pending;
		2571
		2572	if (expect_true (pending))
		2573	{
		2574	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2575	p->w = (W)&pending_w;
		2576	w_->pending = 0;
		2577	return p->events;
		2578	}
		2579	else
		2580	return 0;
		2581	}
		2582
1254	inline void	2583	inline_size void
		2584	pri_adjust (EV_P_ W w)
		2585	{
		2586	int pri = ev_priority (w);
		2587	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2588	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2589	ev_set_priority (w, pri);
		2590	}
		2591
		2592	inline_speed void
1255	ev_start (EV_P_ W w, int active)	2593	ev_start (EV_P_ W w, int active)
1256	{	2594	{
1257	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2595	pri_adjust (EV_A_ w);
1258	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1259
1260	w->active = active;	2596	w->active = active;
1261	ev_ref (EV_A);	2597	ev_ref (EV_A);
1262	}	2598	}
1263		2599
1264	inline void	2600	inline_size void
1265	ev_stop (EV_P_ W w)	2601	ev_stop (EV_P_ W w)
1266	{	2602	{
1267	ev_unref (EV_A);	2603	ev_unref (EV_A);
1268	w->active = 0;	2604	w->active = 0;
1269	}	2605	}
1270		2606
1271	/*****************************************************************************/	2607	/*****************************************************************************/
1272		2608
1273	void	2609	void noinline
1274	ev_io_start (EV_P_ struct ev_io *w)	2610	ev_io_start (EV_P_ ev_io *w)
1275	{	2611	{
1276	int fd = w->fd;	2612	int fd = w->fd;
1277		2613
		2614	if (expect_false (ev_is_active (w)))
		2615	return;
		2616
		2617	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2618	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET \| EV_READ \| EV_WRITE))));
		2619
		2620	EV_FREQUENT_CHECK;
		2621
		2622	ev_start (EV_A_ (W)w, 1);
		2623	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
		2624	wlist_add (&anfds[fd].head, (WL)w);
		2625
		2626	fd_change (EV_A_ fd, w->events & EV__IOFDSET \| EV_ANFD_REIFY);
		2627	w->events &= ~EV__IOFDSET;
		2628
		2629	EV_FREQUENT_CHECK;
		2630	}
		2631
		2632	void noinline
		2633	ev_io_stop (EV_P_ ev_io *w)
		2634	{
		2635	clear_pending (EV_A_ (W)w);
		2636	if (expect_false (!ev_is_active (w)))
		2637	return;
		2638
		2639	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2640
		2641	EV_FREQUENT_CHECK;
		2642
		2643	wlist_del (&anfds[w->fd].head, (WL)w);
		2644	ev_stop (EV_A_ (W)w);
		2645
		2646	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
		2647
		2648	EV_FREQUENT_CHECK;
		2649	}
		2650
		2651	void noinline
		2652	ev_timer_start (EV_P_ ev_timer *w)
		2653	{
		2654	if (expect_false (ev_is_active (w)))
		2655	return;
		2656
		2657	ev_at (w) += mn_now;
		2658
		2659	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		2660
		2661	EV_FREQUENT_CHECK;
		2662
		2663	++timercnt;
		2664	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
		2665	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
		2666	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2667	ANHE_at_cache (timers [ev_active (w)]);
		2668	upheap (timers, ev_active (w));
		2669
		2670	EV_FREQUENT_CHECK;
		2671
		2672	/assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
		2673	}
		2674
		2675	void noinline
		2676	ev_timer_stop (EV_P_ ev_timer *w)
		2677	{
		2678	clear_pending (EV_A_ (W)w);
		2679	if (expect_false (!ev_is_active (w)))
		2680	return;
		2681
		2682	EV_FREQUENT_CHECK;
		2683
		2684	{
		2685	int active = ev_active (w);
		2686
		2687	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2688
		2689	--timercnt;
		2690
		2691	if (expect_true (active < timercnt + HEAP0))
		2692	{
		2693	timers [active] = timers [timercnt + HEAP0];
		2694	adjustheap (timers, timercnt, active);
		2695	}
		2696	}
		2697
		2698	ev_at (w) -= mn_now;
		2699
		2700	ev_stop (EV_A_ (W)w);
		2701
		2702	EV_FREQUENT_CHECK;
		2703	}
		2704
		2705	void noinline
		2706	ev_timer_again (EV_P_ ev_timer *w)
		2707	{
		2708	EV_FREQUENT_CHECK;
		2709
1278	if (ev_is_active (w))	2710	if (ev_is_active (w))
1279	return;
1280
1281	assert (("ev_io_start called with negative fd", fd >= 0));
1282
1283	ev_start (EV_A_ (W)w, 1);
1284	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1285	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1286
1287	fd_change (EV_A_ fd);
1288	}
1289
1290	void
1291	ev_io_stop (EV_P_ struct ev_io *w)
1292	{
1293	ev_clear_pending (EV_A_ (W)w);
1294	if (!ev_is_active (w))
1295	return;
1296
1297	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1298
1299	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1300	ev_stop (EV_A_ (W)w);
1301
1302	fd_change (EV_A_ w->fd);
1303	}
1304
1305	void
1306	ev_timer_start (EV_P_ struct ev_timer *w)
1307	{
1308	if (ev_is_active (w))
1309	return;
1310
1311	((WT)w)->at += mn_now;
1312
1313	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1314
1315	ev_start (EV_A_ (W)w, ++timercnt);
1316	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1317	timers [timercnt - 1] = w;
1318	upheap ((WT *)timers, timercnt - 1);
1319
1320	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1321	}
1322
1323	void
1324	ev_timer_stop (EV_P_ struct ev_timer *w)
1325	{
1326	ev_clear_pending (EV_A_ (W)w);
1327	if (!ev_is_active (w))
1328	return;
1329
1330	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1331
1332	if (((W)w)->active < timercnt--)
1333	{
1334	timers [((W)w)->active - 1] = timers [timercnt];
1335	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1336	}
1337
1338	((WT)w)->at = w->repeat;
1339
1340	ev_stop (EV_A_ (W)w);
1341	}
1342
1343	void
1344	ev_timer_again (EV_P_ struct ev_timer *w)
1345	{
1346	if (ev_is_active (w))
1347	{	2711	{
1348	if (w->repeat)	2712	if (w->repeat)
1349	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);	2713	{
		2714	ev_at (w) = mn_now + w->repeat;
		2715	ANHE_at_cache (timers [ev_active (w)]);
		2716	adjustheap (timers, timercnt, ev_active (w));
		2717	}
1350	else	2718	else
1351	ev_timer_stop (EV_A_ w);	2719	ev_timer_stop (EV_A_ w);
1352	}	2720	}
1353	else if (w->repeat)	2721	else if (w->repeat)
		2722	{
		2723	ev_at (w) = w->repeat;
1354	ev_timer_start (EV_A_ w);	2724	ev_timer_start (EV_A_ w);
1355	}	2725	}
1356		2726
1357	void	2727	EV_FREQUENT_CHECK;
		2728	}
		2729
		2730	ev_tstamp
		2731	ev_timer_remaining (EV_P_ ev_timer *w)
		2732	{
		2733	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2734	}
		2735
		2736	#if EV_PERIODIC_ENABLE
		2737	void noinline
1358	ev_periodic_start (EV_P_ struct ev_periodic *w)	2738	ev_periodic_start (EV_P_ ev_periodic *w)
1359	{	2739	{
1360	if (ev_is_active (w))	2740	if (expect_false (ev_is_active (w)))
1361	return;	2741	return;
1362		2742
1363	if (w->reschedule_cb)	2743	if (w->reschedule_cb)
1364	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2744	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1365	else if (w->interval)	2745	else if (w->interval)
1366	{	2746	{
1367	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2747	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1368	/* this formula differs from the one in periodic_reify because we do not always round up */	2748	/* this formula differs from the one in periodic_reify because we do not always round up */
1369	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2749	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1370	}	2750	}
		2751	else
		2752	ev_at (w) = w->offset;
1371		2753
		2754	EV_FREQUENT_CHECK;
		2755
		2756	++periodiccnt;
1372	ev_start (EV_A_ (W)w, ++periodiccnt);	2757	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1373	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));	2758	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1374	periodics [periodiccnt - 1] = w;	2759	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1375	upheap ((WT *)periodics, periodiccnt - 1);	2760	ANHE_at_cache (periodics [ev_active (w)]);
		2761	upheap (periodics, ev_active (w));
1376		2762
		2763	EV_FREQUENT_CHECK;
		2764
1377	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2765	/assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
1378	}	2766	}
1379		2767
1380	void	2768	void noinline
1381	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2769	ev_periodic_stop (EV_P_ ev_periodic *w)
1382	{	2770	{
1383	ev_clear_pending (EV_A_ (W)w);	2771	clear_pending (EV_A_ (W)w);
1384	if (!ev_is_active (w))	2772	if (expect_false (!ev_is_active (w)))
1385	return;	2773	return;
1386		2774
		2775	EV_FREQUENT_CHECK;
		2776
		2777	{
		2778	int active = ev_active (w);
		2779
1387	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2780	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1388		2781
1389	if (((W)w)->active < periodiccnt--)	2782	--periodiccnt;
		2783
		2784	if (expect_true (active < periodiccnt + HEAP0))
1390	{	2785	{
1391	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2786	periodics [active] = periodics [periodiccnt + HEAP0];
1392	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2787	adjustheap (periodics, periodiccnt, active);
1393	}	2788	}
		2789	}
1394		2790
1395	ev_stop (EV_A_ (W)w);	2791	ev_stop (EV_A_ (W)w);
1396	}
1397		2792
1398	void	2793	EV_FREQUENT_CHECK;
		2794	}
		2795
		2796	void noinline
1399	ev_periodic_again (EV_P_ struct ev_periodic *w)	2797	ev_periodic_again (EV_P_ ev_periodic *w)
1400	{	2798	{
1401	/* TODO: use adjustheap and recalculation */	2799	/* TODO: use adjustheap and recalculation */
1402	ev_periodic_stop (EV_A_ w);	2800	ev_periodic_stop (EV_A_ w);
1403	ev_periodic_start (EV_A_ w);	2801	ev_periodic_start (EV_A_ w);
1404	}	2802	}
1405		2803	#endif
1406	void
1407	ev_idle_start (EV_P_ struct ev_idle *w)
1408	{
1409	if (ev_is_active (w))
1410	return;
1411
1412	ev_start (EV_A_ (W)w, ++idlecnt);
1413	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1414	idles [idlecnt - 1] = w;
1415	}
1416
1417	void
1418	ev_idle_stop (EV_P_ struct ev_idle *w)
1419	{
1420	ev_clear_pending (EV_A_ (W)w);
1421	if (ev_is_active (w))
1422	return;
1423
1424	idles [((W)w)->active - 1] = idles [--idlecnt];
1425	ev_stop (EV_A_ (W)w);
1426	}
1427
1428	void
1429	ev_prepare_start (EV_P_ struct ev_prepare *w)
1430	{
1431	if (ev_is_active (w))
1432	return;
1433
1434	ev_start (EV_A_ (W)w, ++preparecnt);
1435	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1436	prepares [preparecnt - 1] = w;
1437	}
1438
1439	void
1440	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1441	{
1442	ev_clear_pending (EV_A_ (W)w);
1443	if (ev_is_active (w))
1444	return;
1445
1446	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1447	ev_stop (EV_A_ (W)w);
1448	}
1449
1450	void
1451	ev_check_start (EV_P_ struct ev_check *w)
1452	{
1453	if (ev_is_active (w))
1454	return;
1455
1456	ev_start (EV_A_ (W)w, ++checkcnt);
1457	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1458	checks [checkcnt - 1] = w;
1459	}
1460
1461	void
1462	ev_check_stop (EV_P_ struct ev_check *w)
1463	{
1464	ev_clear_pending (EV_A_ (W)w);
1465	if (ev_is_active (w))
1466	return;
1467
1468	checks [((W)w)->active - 1] = checks [--checkcnt];
1469	ev_stop (EV_A_ (W)w);
1470	}
1471		2804
1472	#ifndef SA_RESTART	2805	#ifndef SA_RESTART
1473	# define SA_RESTART 0	2806	# define SA_RESTART 0
1474	#endif	2807	#endif
1475		2808
1476	void	2809	#if EV_SIGNAL_ENABLE
		2810
		2811	void noinline
1477	ev_signal_start (EV_P_ struct ev_signal *w)	2812	ev_signal_start (EV_P_ ev_signal *w)
1478	{	2813	{
		2814	if (expect_false (ev_is_active (w)))
		2815	return;
		2816
		2817	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
		2818
1479	#if EV_MULTIPLICITY	2819	#if EV_MULTIPLICITY
1480	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2820	assert (("libev: a signal must not be attached to two different loops",
		2821	!signals [w->signum - 1].loop \|\| signals [w->signum - 1].loop == loop));
		2822
		2823	signals [w->signum - 1].loop = EV_A;
		2824	#endif
		2825
		2826	EV_FREQUENT_CHECK;
		2827
		2828	#if EV_USE_SIGNALFD
		2829	if (sigfd == -2)
		2830	{
		2831	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK \| SFD_CLOEXEC);
		2832	if (sigfd < 0 && errno == EINVAL)
		2833	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
		2834
		2835	if (sigfd >= 0)
		2836	{
		2837	fd_intern (sigfd); /* doing it twice will not hurt */
		2838
		2839	sigemptyset (&sigfd_set);
		2840
		2841	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2842	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2843	ev_io_start (EV_A_ &sigfd_w);
		2844	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2845	}
		2846	}
		2847
		2848	if (sigfd >= 0)
		2849	{
		2850	/* TODO: check .head */
		2851	sigaddset (&sigfd_set, w->signum);
		2852	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2853
		2854	signalfd (sigfd, &sigfd_set, 0);
		2855	}
		2856	#endif
		2857
		2858	ev_start (EV_A_ (W)w, 1);
		2859	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2860
		2861	if (!((WL)w)->next)
		2862	# if EV_USE_SIGNALFD
		2863	if (sigfd < 0) /TODO/
1481	#endif	2864	# endif
1482	if (ev_is_active (w))	2865	{
		2866	# ifdef _WIN32
		2867	evpipe_init (EV_A);
		2868
		2869	signal (w->signum, ev_sighandler);
		2870	# else
		2871	struct sigaction sa;
		2872
		2873	evpipe_init (EV_A);
		2874
		2875	sa.sa_handler = ev_sighandler;
		2876	sigfillset (&sa.sa_mask);
		2877	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2878	sigaction (w->signum, &sa, 0);
		2879
		2880	sigemptyset (&sa.sa_mask);
		2881	sigaddset (&sa.sa_mask, w->signum);
		2882	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		2883	#endif
		2884	}
		2885
		2886	EV_FREQUENT_CHECK;
		2887	}
		2888
		2889	void noinline
		2890	ev_signal_stop (EV_P_ ev_signal *w)
		2891	{
		2892	clear_pending (EV_A_ (W)w);
		2893	if (expect_false (!ev_is_active (w)))
1483	return;	2894	return;
1484		2895
1485	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2896	EV_FREQUENT_CHECK;
		2897
		2898	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2899	ev_stop (EV_A_ (W)w);
		2900
		2901	if (!signals [w->signum - 1].head)
		2902	{
		2903	#if EV_MULTIPLICITY
		2904	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2905	#endif
		2906	#if EV_USE_SIGNALFD
		2907	if (sigfd >= 0)
		2908	{
		2909	sigset_t ss;
		2910
		2911	sigemptyset (&ss);
		2912	sigaddset (&ss, w->signum);
		2913	sigdelset (&sigfd_set, w->signum);
		2914
		2915	signalfd (sigfd, &sigfd_set, 0);
		2916	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2917	}
		2918	else
		2919	#endif
		2920	signal (w->signum, SIG_DFL);
		2921	}
		2922
		2923	EV_FREQUENT_CHECK;
		2924	}
		2925
		2926	#endif
		2927
		2928	#if EV_CHILD_ENABLE
		2929
		2930	void
		2931	ev_child_start (EV_P_ ev_child *w)
		2932	{
		2933	#if EV_MULTIPLICITY
		2934	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2935	#endif
		2936	if (expect_false (ev_is_active (w)))
		2937	return;
		2938
		2939	EV_FREQUENT_CHECK;
1486		2940
1487	ev_start (EV_A_ (W)w, 1);	2941	ev_start (EV_A_ (W)w, 1);
1488	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2942	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1489	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1490		2943
1491	if (!((WL)w)->next)	2944	EV_FREQUENT_CHECK;
		2945	}
		2946
		2947	void
		2948	ev_child_stop (EV_P_ ev_child *w)
		2949	{
		2950	clear_pending (EV_A_ (W)w);
		2951	if (expect_false (!ev_is_active (w)))
		2952	return;
		2953
		2954	EV_FREQUENT_CHECK;
		2955
		2956	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
		2957	ev_stop (EV_A_ (W)w);
		2958
		2959	EV_FREQUENT_CHECK;
		2960	}
		2961
		2962	#endif
		2963
		2964	#if EV_STAT_ENABLE
		2965
		2966	# ifdef _WIN32
		2967	# undef lstat
		2968	# define lstat(a,b) _stati64 (a,b)
		2969	# endif
		2970
		2971	#define DEF_STAT_INTERVAL 5.0074891
		2972	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
		2973	#define MIN_STAT_INTERVAL 0.1074891
		2974
		2975	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2976
		2977	#if EV_USE_INOTIFY
		2978
		2979	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2980	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
		2981
		2982	static void noinline
		2983	infy_add (EV_P_ ev_stat *w)
		2984	{
		2985	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);
		2986
		2987	if (w->wd >= 0)
		2988	{
		2989	struct statfs sfs;
		2990
		2991	/* now local changes will be tracked by inotify, but remote changes won't */
		2992	/* unless the filesystem is known to be local, we therefore still poll */
		2993	/* also do poll on <2.6.25, but with normal frequency */
		2994
		2995	if (!fs_2625)
		2996	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2997	else if (!statfs (w->path, &sfs)
		2998	&& (sfs.f_type == 0x1373 /* devfs */
		2999	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		3000	\|\| sfs.f_type == 0x3153464a /* jfs */
		3001	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		3002	\|\| sfs.f_type == 0x01021994 /* tempfs */
		3003	\|\| sfs.f_type == 0x58465342 /* xfs */))
		3004	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		3005	else
		3006	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1492	{	3007	}
1493	#if WIN32	3008	else
1494	signal (w->signum, sighandler);	3009	{
		3010	/* can't use inotify, continue to stat */
		3011	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3012
		3013	/* if path is not there, monitor some parent directory for speedup hints */
		3014	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		3015	/* but an efficiency issue only */
		3016	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
		3017	{
		3018	char path [4096];
		3019	strcpy (path, w->path);
		3020
		3021	do
		3022	{
		3023	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		3024	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		3025
		3026	char *pend = strrchr (path, '/');
		3027
		3028	if (!pend \|\| pend == path)
		3029	break;
		3030
		3031	*pend = 0;
		3032	w->wd = inotify_add_watch (fs_fd, path, mask);
		3033	}
		3034	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		3035	}
		3036	}
		3037
		3038	if (w->wd >= 0)
		3039	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3040
		3041	/* now re-arm timer, if required */
		3042	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3043	ev_timer_again (EV_A_ &w->timer);
		3044	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3045	}
		3046
		3047	static void noinline
		3048	infy_del (EV_P_ ev_stat *w)
		3049	{
		3050	int slot;
		3051	int wd = w->wd;
		3052
		3053	if (wd < 0)
		3054	return;
		3055
		3056	w->wd = -2;
		3057	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
		3058	wlist_del (&fs_hash [slot].head, (WL)w);
		3059
		3060	/* remove this watcher, if others are watching it, they will rearm */
		3061	inotify_rm_watch (fs_fd, wd);
		3062	}
		3063
		3064	static void noinline
		3065	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		3066	{
		3067	if (slot < 0)
		3068	/* overflow, need to check for all hash slots */
		3069	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
		3070	infy_wd (EV_A_ slot, wd, ev);
		3071	else
		3072	{
		3073	WL w_;
		3074
		3075	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
		3076	{
		3077	ev_stat w = (ev_stat )w_;
		3078	w_ = w_->next; /* lets us remove this watcher and all before it */
		3079
		3080	if (w->wd == wd \|\| wd == -1)
		3081	{
		3082	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		3083	{
		3084	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3085	w->wd = -1;
		3086	infy_add (EV_A_ w); /* re-add, no matter what */
		3087	}
		3088
		3089	stat_timer_cb (EV_A_ &w->timer, 0);
		3090	}
		3091	}
		3092	}
		3093	}
		3094
		3095	static void
		3096	infy_cb (EV_P_ ev_io *w, int revents)
		3097	{
		3098	char buf [EV_INOTIFY_BUFSIZE];
		3099	int ofs;
		3100	int len = read (fs_fd, buf, sizeof (buf));
		3101
		3102	for (ofs = 0; ofs < len; )
		3103	{
		3104	struct inotify_event ev = (struct inotify_event )(buf + ofs);
		3105	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3106	ofs += sizeof (struct inotify_event) + ev->len;
		3107	}
		3108	}
		3109
		3110	inline_size void
		3111	ev_check_2625 (EV_P)
		3112	{
		3113	/* kernels < 2.6.25 are borked
		3114	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		3115	*/
		3116	if (ev_linux_version () < 0x020619)
		3117	return;
		3118
		3119	fs_2625 = 1;
		3120	}
		3121
		3122	inline_size int
		3123	infy_newfd (void)
		3124	{
		3125	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3126	int fd = inotify_init1 (IN_CLOEXEC \| IN_NONBLOCK);
		3127	if (fd >= 0)
		3128	return fd;
		3129	#endif
		3130	return inotify_init ();
		3131	}
		3132
		3133	inline_size void
		3134	infy_init (EV_P)
		3135	{
		3136	if (fs_fd != -2)
		3137	return;
		3138
		3139	fs_fd = -1;
		3140
		3141	ev_check_2625 (EV_A);
		3142
		3143	fs_fd = infy_newfd ();
		3144
		3145	if (fs_fd >= 0)
		3146	{
		3147	fd_intern (fs_fd);
		3148	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		3149	ev_set_priority (&fs_w, EV_MAXPRI);
		3150	ev_io_start (EV_A_ &fs_w);
		3151	ev_unref (EV_A);
		3152	}
		3153	}
		3154
		3155	inline_size void
		3156	infy_fork (EV_P)
		3157	{
		3158	int slot;
		3159
		3160	if (fs_fd < 0)
		3161	return;
		3162
		3163	ev_ref (EV_A);
		3164	ev_io_stop (EV_A_ &fs_w);
		3165	close (fs_fd);
		3166	fs_fd = infy_newfd ();
		3167
		3168	if (fs_fd >= 0)
		3169	{
		3170	fd_intern (fs_fd);
		3171	ev_io_set (&fs_w, fs_fd, EV_READ);
		3172	ev_io_start (EV_A_ &fs_w);
		3173	ev_unref (EV_A);
		3174	}
		3175
		3176	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
		3177	{
		3178	WL w_ = fs_hash [slot].head;
		3179	fs_hash [slot].head = 0;
		3180
		3181	while (w_)
		3182	{
		3183	ev_stat w = (ev_stat )w_;
		3184	w_ = w_->next; /* lets us add this watcher */
		3185
		3186	w->wd = -1;
		3187
		3188	if (fs_fd >= 0)
		3189	infy_add (EV_A_ w); /* re-add, no matter what */
		3190	else
		3191	{
		3192	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3193	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3194	ev_timer_again (EV_A_ &w->timer);
		3195	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3196	}
		3197	}
		3198	}
		3199	}
		3200
		3201	#endif
		3202
		3203	#ifdef _WIN32
		3204	# define EV_LSTAT(p,b) _stati64 (p, b)
1495	#else	3205	#else
1496	struct sigaction sa;	3206	# define EV_LSTAT(p,b) lstat (p, b)
1497	sa.sa_handler = sighandler;
1498	sigfillset (&sa.sa_mask);
1499	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1500	sigaction (w->signum, &sa, 0);
1501	#endif	3207	#endif
1502	}
1503	}
1504		3208
1505	void	3209	void
1506	ev_signal_stop (EV_P_ struct ev_signal *w)	3210	ev_stat_stat (EV_P_ ev_stat *w)
1507	{	3211	{
1508	ev_clear_pending (EV_A_ (W)w);	3212	if (lstat (w->path, &w->attr) < 0)
1509	if (!ev_is_active (w))	3213	w->attr.st_nlink = 0;
		3214	else if (!w->attr.st_nlink)
		3215	w->attr.st_nlink = 1;
		3216	}
		3217
		3218	static void noinline
		3219	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		3220	{
		3221	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		3222
		3223	ev_statdata prev = w->attr;
		3224	ev_stat_stat (EV_A_ w);
		3225
		3226	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		3227	if (
		3228	prev.st_dev != w->attr.st_dev
		3229	\|\| prev.st_ino != w->attr.st_ino
		3230	\|\| prev.st_mode != w->attr.st_mode
		3231	\|\| prev.st_nlink != w->attr.st_nlink
		3232	\|\| prev.st_uid != w->attr.st_uid
		3233	\|\| prev.st_gid != w->attr.st_gid
		3234	\|\| prev.st_rdev != w->attr.st_rdev
		3235	\|\| prev.st_size != w->attr.st_size
		3236	\|\| prev.st_atime != w->attr.st_atime
		3237	\|\| prev.st_mtime != w->attr.st_mtime
		3238	\|\| prev.st_ctime != w->attr.st_ctime
		3239	) {
		3240	/* we only update w->prev on actual differences */
		3241	/* in case we test more often than invoke the callback, */
		3242	/* to ensure that prev is always different to attr */
		3243	w->prev = prev;
		3244
		3245	#if EV_USE_INOTIFY
		3246	if (fs_fd >= 0)
		3247	{
		3248	infy_del (EV_A_ w);
		3249	infy_add (EV_A_ w);
		3250	ev_stat_stat (EV_A_ w); /* avoid race... */
		3251	}
		3252	#endif
		3253
		3254	ev_feed_event (EV_A_ w, EV_STAT);
		3255	}
		3256	}
		3257
		3258	void
		3259	ev_stat_start (EV_P_ ev_stat *w)
		3260	{
		3261	if (expect_false (ev_is_active (w)))
1510	return;	3262	return;
1511		3263
1512	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	3264	ev_stat_stat (EV_A_ w);
		3265
		3266	if (w->interval < MIN_STAT_INTERVAL && w->interval)
		3267	w->interval = MIN_STAT_INTERVAL;
		3268
		3269	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
		3270	ev_set_priority (&w->timer, ev_priority (w));
		3271
		3272	#if EV_USE_INOTIFY
		3273	infy_init (EV_A);
		3274
		3275	if (fs_fd >= 0)
		3276	infy_add (EV_A_ w);
		3277	else
		3278	#endif
		3279	{
		3280	ev_timer_again (EV_A_ &w->timer);
		3281	ev_unref (EV_A);
		3282	}
		3283
		3284	ev_start (EV_A_ (W)w, 1);
		3285
		3286	EV_FREQUENT_CHECK;
		3287	}
		3288
		3289	void
		3290	ev_stat_stop (EV_P_ ev_stat *w)
		3291	{
		3292	clear_pending (EV_A_ (W)w);
		3293	if (expect_false (!ev_is_active (w)))
		3294	return;
		3295
		3296	EV_FREQUENT_CHECK;
		3297
		3298	#if EV_USE_INOTIFY
		3299	infy_del (EV_A_ w);
		3300	#endif
		3301
		3302	if (ev_is_active (&w->timer))
		3303	{
		3304	ev_ref (EV_A);
		3305	ev_timer_stop (EV_A_ &w->timer);
		3306	}
		3307
1513	ev_stop (EV_A_ (W)w);	3308	ev_stop (EV_A_ (W)w);
1514		3309
1515	if (!signals [w->signum - 1].head)	3310	EV_FREQUENT_CHECK;
1516	signal (w->signum, SIG_DFL);
1517	}	3311	}
		3312	#endif
1518		3313
		3314	#if EV_IDLE_ENABLE
1519	void	3315	void
1520	ev_child_start (EV_P_ struct ev_child *w)	3316	ev_idle_start (EV_P_ ev_idle *w)
1521	{	3317	{
1522	#if EV_MULTIPLICITY
1523	assert (("child watchers are only supported in the default loop", loop == default_loop));
1524	#endif
1525	if (ev_is_active (w))	3318	if (expect_false (ev_is_active (w)))
1526	return;	3319	return;
1527		3320
		3321	pri_adjust (EV_A_ (W)w);
		3322
		3323	EV_FREQUENT_CHECK;
		3324
		3325	{
		3326	int active = ++idlecnt [ABSPRI (w)];
		3327
		3328	++idleall;
		3329	ev_start (EV_A_ (W)w, active);
		3330
		3331	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		3332	idles [ABSPRI (w)][active - 1] = w;
		3333	}
		3334
		3335	EV_FREQUENT_CHECK;
		3336	}
		3337
		3338	void
		3339	ev_idle_stop (EV_P_ ev_idle *w)
		3340	{
		3341	clear_pending (EV_A_ (W)w);
		3342	if (expect_false (!ev_is_active (w)))
		3343	return;
		3344
		3345	EV_FREQUENT_CHECK;
		3346
		3347	{
		3348	int active = ev_active (w);
		3349
		3350	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		3351	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		3352
		3353	ev_stop (EV_A_ (W)w);
		3354	--idleall;
		3355	}
		3356
		3357	EV_FREQUENT_CHECK;
		3358	}
		3359	#endif
		3360
		3361	#if EV_PREPARE_ENABLE
		3362	void
		3363	ev_prepare_start (EV_P_ ev_prepare *w)
		3364	{
		3365	if (expect_false (ev_is_active (w)))
		3366	return;
		3367
		3368	EV_FREQUENT_CHECK;
		3369
		3370	ev_start (EV_A_ (W)w, ++preparecnt);
		3371	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		3372	prepares [preparecnt - 1] = w;
		3373
		3374	EV_FREQUENT_CHECK;
		3375	}
		3376
		3377	void
		3378	ev_prepare_stop (EV_P_ ev_prepare *w)
		3379	{
		3380	clear_pending (EV_A_ (W)w);
		3381	if (expect_false (!ev_is_active (w)))
		3382	return;
		3383
		3384	EV_FREQUENT_CHECK;
		3385
		3386	{
		3387	int active = ev_active (w);
		3388
		3389	prepares [active - 1] = prepares [--preparecnt];
		3390	ev_active (prepares [active - 1]) = active;
		3391	}
		3392
		3393	ev_stop (EV_A_ (W)w);
		3394
		3395	EV_FREQUENT_CHECK;
		3396	}
		3397	#endif
		3398
		3399	#if EV_CHECK_ENABLE
		3400	void
		3401	ev_check_start (EV_P_ ev_check *w)
		3402	{
		3403	if (expect_false (ev_is_active (w)))
		3404	return;
		3405
		3406	EV_FREQUENT_CHECK;
		3407
		3408	ev_start (EV_A_ (W)w, ++checkcnt);
		3409	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		3410	checks [checkcnt - 1] = w;
		3411
		3412	EV_FREQUENT_CHECK;
		3413	}
		3414
		3415	void
		3416	ev_check_stop (EV_P_ ev_check *w)
		3417	{
		3418	clear_pending (EV_A_ (W)w);
		3419	if (expect_false (!ev_is_active (w)))
		3420	return;
		3421
		3422	EV_FREQUENT_CHECK;
		3423
		3424	{
		3425	int active = ev_active (w);
		3426
		3427	checks [active - 1] = checks [--checkcnt];
		3428	ev_active (checks [active - 1]) = active;
		3429	}
		3430
		3431	ev_stop (EV_A_ (W)w);
		3432
		3433	EV_FREQUENT_CHECK;
		3434	}
		3435	#endif
		3436
		3437	#if EV_EMBED_ENABLE
		3438	void noinline
		3439	ev_embed_sweep (EV_P_ ev_embed *w)
		3440	{
		3441	ev_run (w->other, EVRUN_NOWAIT);
		3442	}
		3443
		3444	static void
		3445	embed_io_cb (EV_P_ ev_io *io, int revents)
		3446	{
		3447	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		3448
		3449	if (ev_cb (w))
		3450	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		3451	else
		3452	ev_run (w->other, EVRUN_NOWAIT);
		3453	}
		3454
		3455	static void
		3456	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		3457	{
		3458	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		3459
		3460	{
		3461	EV_P = w->other;
		3462
		3463	while (fdchangecnt)
		3464	{
		3465	fd_reify (EV_A);
		3466	ev_run (EV_A_ EVRUN_NOWAIT);
		3467	}
		3468	}
		3469	}
		3470
		3471	static void
		3472	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3473	{
		3474	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));
		3475
		3476	ev_embed_stop (EV_A_ w);
		3477
		3478	{
		3479	EV_P = w->other;
		3480
		3481	ev_loop_fork (EV_A);
		3482	ev_run (EV_A_ EVRUN_NOWAIT);
		3483	}
		3484
		3485	ev_embed_start (EV_A_ w);
		3486	}
		3487
		3488	#if 0
		3489	static void
		3490	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		3491	{
		3492	ev_idle_stop (EV_A_ idle);
		3493	}
		3494	#endif
		3495
		3496	void
		3497	ev_embed_start (EV_P_ ev_embed *w)
		3498	{
		3499	if (expect_false (ev_is_active (w)))
		3500	return;
		3501
		3502	{
		3503	EV_P = w->other;
		3504	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		3505	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		3506	}
		3507
		3508	EV_FREQUENT_CHECK;
		3509
		3510	ev_set_priority (&w->io, ev_priority (w));
		3511	ev_io_start (EV_A_ &w->io);
		3512
		3513	ev_prepare_init (&w->prepare, embed_prepare_cb);
		3514	ev_set_priority (&w->prepare, EV_MINPRI);
		3515	ev_prepare_start (EV_A_ &w->prepare);
		3516
		3517	ev_fork_init (&w->fork, embed_fork_cb);
		3518	ev_fork_start (EV_A_ &w->fork);
		3519
		3520	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		3521
1528	ev_start (EV_A_ (W)w, 1);	3522	ev_start (EV_A_ (W)w, 1);
1529	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1530	}
1531		3523
		3524	EV_FREQUENT_CHECK;
		3525	}
		3526
1532	void	3527	void
1533	ev_child_stop (EV_P_ struct ev_child *w)	3528	ev_embed_stop (EV_P_ ev_embed *w)
1534	{	3529	{
1535	ev_clear_pending (EV_A_ (W)w);	3530	clear_pending (EV_A_ (W)w);
1536	if (ev_is_active (w))	3531	if (expect_false (!ev_is_active (w)))
1537	return;	3532	return;
1538		3533
1539	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	3534	EV_FREQUENT_CHECK;
		3535
		3536	ev_io_stop (EV_A_ &w->io);
		3537	ev_prepare_stop (EV_A_ &w->prepare);
		3538	ev_fork_stop (EV_A_ &w->fork);
		3539
1540	ev_stop (EV_A_ (W)w);	3540	ev_stop (EV_A_ (W)w);
		3541
		3542	EV_FREQUENT_CHECK;
1541	}	3543	}
		3544	#endif
		3545
		3546	#if EV_FORK_ENABLE
		3547	void
		3548	ev_fork_start (EV_P_ ev_fork *w)
		3549	{
		3550	if (expect_false (ev_is_active (w)))
		3551	return;
		3552
		3553	EV_FREQUENT_CHECK;
		3554
		3555	ev_start (EV_A_ (W)w, ++forkcnt);
		3556	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		3557	forks [forkcnt - 1] = w;
		3558
		3559	EV_FREQUENT_CHECK;
		3560	}
		3561
		3562	void
		3563	ev_fork_stop (EV_P_ ev_fork *w)
		3564	{
		3565	clear_pending (EV_A_ (W)w);
		3566	if (expect_false (!ev_is_active (w)))
		3567	return;
		3568
		3569	EV_FREQUENT_CHECK;
		3570
		3571	{
		3572	int active = ev_active (w);
		3573
		3574	forks [active - 1] = forks [--forkcnt];
		3575	ev_active (forks [active - 1]) = active;
		3576	}
		3577
		3578	ev_stop (EV_A_ (W)w);
		3579
		3580	EV_FREQUENT_CHECK;
		3581	}
		3582	#endif
		3583
		3584	#if EV_CLEANUP_ENABLE
		3585	void
		3586	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3587	{
		3588	if (expect_false (ev_is_active (w)))
		3589	return;
		3590
		3591	EV_FREQUENT_CHECK;
		3592
		3593	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3594	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3595	cleanups [cleanupcnt - 1] = w;
		3596
		3597	EV_FREQUENT_CHECK;
		3598	}
		3599
		3600	void
		3601	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3602	{
		3603	clear_pending (EV_A_ (W)w);
		3604	if (expect_false (!ev_is_active (w)))
		3605	return;
		3606
		3607	EV_FREQUENT_CHECK;
		3608
		3609	{
		3610	int active = ev_active (w);
		3611
		3612	cleanups [active - 1] = cleanups [--cleanupcnt];
		3613	ev_active (cleanups [active - 1]) = active;
		3614	}
		3615
		3616	ev_stop (EV_A_ (W)w);
		3617
		3618	EV_FREQUENT_CHECK;
		3619	}
		3620	#endif
		3621
		3622	#if EV_ASYNC_ENABLE
		3623	void
		3624	ev_async_start (EV_P_ ev_async *w)
		3625	{
		3626	if (expect_false (ev_is_active (w)))
		3627	return;
		3628
		3629	w->sent = 0;
		3630
		3631	evpipe_init (EV_A);
		3632
		3633	EV_FREQUENT_CHECK;
		3634
		3635	ev_start (EV_A_ (W)w, ++asynccnt);
		3636	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		3637	asyncs [asynccnt - 1] = w;
		3638
		3639	EV_FREQUENT_CHECK;
		3640	}
		3641
		3642	void
		3643	ev_async_stop (EV_P_ ev_async *w)
		3644	{
		3645	clear_pending (EV_A_ (W)w);
		3646	if (expect_false (!ev_is_active (w)))
		3647	return;
		3648
		3649	EV_FREQUENT_CHECK;
		3650
		3651	{
		3652	int active = ev_active (w);
		3653
		3654	asyncs [active - 1] = asyncs [--asynccnt];
		3655	ev_active (asyncs [active - 1]) = active;
		3656	}
		3657
		3658	ev_stop (EV_A_ (W)w);
		3659
		3660	EV_FREQUENT_CHECK;
		3661	}
		3662
		3663	void
		3664	ev_async_send (EV_P_ ev_async *w)
		3665	{
		3666	w->sent = 1;
		3667	evpipe_write (EV_A_ &async_pending);
		3668	}
		3669	#endif
1542		3670
1543	/*****************************************************************************/	3671	/*****************************************************************************/
1544		3672
1545	struct ev_once	3673	struct ev_once
1546	{	3674	{
1547	struct ev_io io;	3675	ev_io io;
1548	struct ev_timer to;	3676	ev_timer to;
1549	void (cb)(int revents, void arg);	3677	void (cb)(int revents, void arg);
1550	void *arg;	3678	void *arg;
1551	};	3679	};
1552		3680
1553	static void	3681	static void
1554	once_cb (EV_P_ struct ev_once *once, int revents)	3682	once_cb (EV_P_ struct ev_once *once, int revents)
1555	{	3683	{
1556	void (cb)(int revents, void arg) = once->cb;	3684	void (cb)(int revents, void arg) = once->cb;
1557	void *arg = once->arg;	3685	void *arg = once->arg;
1558		3686
1559	ev_io_stop (EV_A_ &once->io);	3687	ev_io_stop (EV_A_ &once->io);
1560	ev_timer_stop (EV_A_ &once->to);	3688	ev_timer_stop (EV_A_ &once->to);
1561	ev_free (once);	3689	ev_free (once);
1562		3690
1563	cb (revents, arg);	3691	cb (revents, arg);
1564	}	3692	}
1565		3693
1566	static void	3694	static void
1567	once_cb_io (EV_P_ struct ev_io *w, int revents)	3695	once_cb_io (EV_P_ ev_io *w, int revents)
1568	{	3696	{
1569	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	3697	struct ev_once once = (struct ev_once )(((char *)w) - offsetof (struct ev_once, io));
		3698
		3699	once_cb (EV_A_ once, revents \| ev_clear_pending (EV_A_ &once->to));
1570	}	3700	}
1571		3701
1572	static void	3702	static void
1573	once_cb_to (EV_P_ struct ev_timer *w, int revents)	3703	once_cb_to (EV_P_ ev_timer *w, int revents)
1574	{	3704	{
1575	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	3705	struct ev_once once = (struct ev_once )(((char *)w) - offsetof (struct ev_once, to));
		3706
		3707	once_cb (EV_A_ once, revents \| ev_clear_pending (EV_A_ &once->io));
1576	}	3708	}
1577		3709
1578	void	3710	void
1579	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	3711	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1580	{	3712	{
1581	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));	3713	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1582		3714
1583	if (!once)	3715	if (expect_false (!once))
		3716	{
1584	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	3717	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMER, arg);
1585	else	3718	return;
1586	{	3719	}
		3720
1587	once->cb = cb;	3721	once->cb = cb;
1588	once->arg = arg;	3722	once->arg = arg;
1589		3723
1590	ev_init (&once->io, once_cb_io);	3724	ev_init (&once->io, once_cb_io);
1591	if (fd >= 0)	3725	if (fd >= 0)
		3726	{
		3727	ev_io_set (&once->io, fd, events);
		3728	ev_io_start (EV_A_ &once->io);
		3729	}
		3730
		3731	ev_init (&once->to, once_cb_to);
		3732	if (timeout >= 0.)
		3733	{
		3734	ev_timer_set (&once->to, timeout, 0.);
		3735	ev_timer_start (EV_A_ &once->to);
		3736	}
		3737	}
		3738
		3739	/*****************************************************************************/
		3740
		3741	#if EV_WALK_ENABLE
		3742	void
		3743	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
		3744	{
		3745	int i, j;
		3746	ev_watcher_list wl, wn;
		3747
		3748	if (types & (EV_IO \| EV_EMBED))
		3749	for (i = 0; i < anfdmax; ++i)
		3750	for (wl = anfds [i].head; wl; )
1592	{	3751	{
1593	ev_io_set (&once->io, fd, events);	3752	wn = wl->next;
1594	ev_io_start (EV_A_ &once->io);	3753
		3754	#if EV_EMBED_ENABLE
		3755	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3756	{
		3757	if (types & EV_EMBED)
		3758	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3759	}
		3760	else
		3761	#endif
		3762	#if EV_USE_INOTIFY
		3763	if (ev_cb ((ev_io *)wl) == infy_cb)
		3764	;
		3765	else
		3766	#endif
		3767	if ((ev_io *)wl != &pipe_w)
		3768	if (types & EV_IO)
		3769	cb (EV_A_ EV_IO, wl);
		3770
		3771	wl = wn;
1595	}	3772	}
1596		3773
1597	ev_init (&once->to, once_cb_to);	3774	if (types & (EV_TIMER \| EV_STAT))
1598	if (timeout >= 0.)	3775	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3776	#if EV_STAT_ENABLE
		3777	/TODO: timer is not always active/
		3778	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1599	{	3779	{
1600	ev_timer_set (&once->to, timeout, 0.);	3780	if (types & EV_STAT)
1601	ev_timer_start (EV_A_ &once->to);	3781	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1602	}	3782	}
1603	}	3783	else
1604	}	3784	#endif
		3785	if (types & EV_TIMER)
		3786	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1605		3787
1606	#ifdef __cplusplus	3788	#if EV_PERIODIC_ENABLE
1607	}	3789	if (types & EV_PERIODIC)
		3790	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3791	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3792	#endif
		3793
		3794	#if EV_IDLE_ENABLE
		3795	if (types & EV_IDLE)
		3796	for (j = NUMPRI; i--; )
		3797	for (i = idlecnt [j]; i--; )
		3798	cb (EV_A_ EV_IDLE, idles [j][i]);
		3799	#endif
		3800
		3801	#if EV_FORK_ENABLE
		3802	if (types & EV_FORK)
		3803	for (i = forkcnt; i--; )
		3804	if (ev_cb (forks [i]) != embed_fork_cb)
		3805	cb (EV_A_ EV_FORK, forks [i]);
		3806	#endif
		3807
		3808	#if EV_ASYNC_ENABLE
		3809	if (types & EV_ASYNC)
		3810	for (i = asynccnt; i--; )
		3811	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3812	#endif
		3813
		3814	#if EV_PREPARE_ENABLE
		3815	if (types & EV_PREPARE)
		3816	for (i = preparecnt; i--; )
		3817	# if EV_EMBED_ENABLE
		3818	if (ev_cb (prepares [i]) != embed_prepare_cb)
1608	#endif	3819	# endif
		3820	cb (EV_A_ EV_PREPARE, prepares [i]);
		3821	#endif
1609		3822
		3823	#if EV_CHECK_ENABLE
		3824	if (types & EV_CHECK)
		3825	for (i = checkcnt; i--; )
		3826	cb (EV_A_ EV_CHECK, checks [i]);
		3827	#endif
		3828
		3829	#if EV_SIGNAL_ENABLE
		3830	if (types & EV_SIGNAL)
		3831	for (i = 0; i < EV_NSIG - 1; ++i)
		3832	for (wl = signals [i].head; wl; )
		3833	{
		3834	wn = wl->next;
		3835	cb (EV_A_ EV_SIGNAL, wl);
		3836	wl = wn;
		3837	}
		3838	#endif
		3839
		3840	#if EV_CHILD_ENABLE
		3841	if (types & EV_CHILD)
		3842	for (i = (EV_PID_HASHSIZE); i--; )
		3843	for (wl = childs [i]; wl; )
		3844	{
		3845	wn = wl->next;
		3846	cb (EV_A_ EV_CHILD, wl);
		3847	wl = wn;
		3848	}
		3849	#endif
		3850	/* EV_STAT 0x00001000 /* stat data changed */
		3851	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3852	}
		3853	#endif
		3854
		3855	#if EV_MULTIPLICITY
		3856	#include "ev_wrap.h"
		3857	#endif
		3858
		3859	EV_CPP(})
		3860

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Comparing libev/ev.c (file contents): Revision 1.89 by root, Sat Nov 10 19:48:44 2007 UTC vs. Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.89 by root, Sat Nov 10 19:48:44 2007 UTC vs.
Revision 1.361 by root, Sun Oct 24 19:01:01 2010 UTC