ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.187 by root, Sun Dec 16 21:54:28 2007 UTC vs.
Revision 1.376 by root, Sat Jun 4 05:33:29 2011 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) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	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:
10	*	9	*
11	* * Redistributions of source code must retain the above copyright	10	* 1. Redistributions of source code must retain the above copyright notice,
12	* notice, this list of conditions and the following disclaimer.	11	* this list of conditions and the following disclaimer.
13	*	12	*
14	* * Redistributions in binary form must reproduce the above	13	* 2. Redistributions in binary form must reproduce the above copyright
15	* copyright notice, this list of conditions and the following	14	* notice, this list of conditions and the following disclaimer in the
16	* disclaimer in the documentation and/or other materials provided	15	* documentation and/or other materials provided with the distribution.
17	* with the distribution.
18	*	16	*
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR	19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT	20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT	21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
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
37	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	43	# include EV_CONFIG_H
39	# else	44	# else
40	# include "config.h"	45	# include "config.h"
41	# endif	46	# endif
42		47
		48	#if HAVE_FLOOR
		49	# ifndef EV_USE_FLOOR
		50	# define EV_USE_FLOOR 1
		51	# endif
		52	#endif
		53
		54	# if HAVE_CLOCK_SYSCALL
		55	# ifndef EV_USE_CLOCK_SYSCALL
		56	# define EV_USE_CLOCK_SYSCALL 1
		57	# ifndef EV_USE_REALTIME
		58	# define EV_USE_REALTIME 0
		59	# endif
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 1
		62	# endif
		63	# endif
		64	# elif !defined(EV_USE_CLOCK_SYSCALL)
		65	# define EV_USE_CLOCK_SYSCALL 0
		66	# endif
		67
43	# if HAVE_CLOCK_GETTIME	68	# if HAVE_CLOCK_GETTIME
44	# ifndef EV_USE_MONOTONIC	69	# ifndef EV_USE_MONOTONIC
45	# define EV_USE_MONOTONIC 1	70	# define EV_USE_MONOTONIC 1
46	# endif	71	# endif
47	# ifndef EV_USE_REALTIME	72	# ifndef EV_USE_REALTIME
48	# define EV_USE_REALTIME 1	73	# define EV_USE_REALTIME 0
49	# endif	74	# endif
50	# else	75	# else
51	# ifndef EV_USE_MONOTONIC	76	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	77	# define EV_USE_MONOTONIC 0
53	# endif	78	# endif
54	# ifndef EV_USE_REALTIME	79	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	80	# define EV_USE_REALTIME 0
56	# endif	81	# endif
57	# endif	82	# endif
58		83
		84	# if HAVE_NANOSLEEP
59	# ifndef EV_USE_SELECT	85	# ifndef EV_USE_NANOSLEEP
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	86	# define EV_USE_NANOSLEEP EV_FEATURE_OS
61	# define EV_USE_SELECT 1
62	# else
63	# define EV_USE_SELECT 0
64	# endif	87	# endif
		88	# else
		89	# undef EV_USE_NANOSLEEP
		90	# define EV_USE_NANOSLEEP 0
65	# endif	91	# endif
66		92
		93	# if HAVE_SELECT && HAVE_SYS_SELECT_H
67	# ifndef EV_USE_POLL	94	# ifndef EV_USE_SELECT
68	# if HAVE_POLL && HAVE_POLL_H	95	# define EV_USE_SELECT EV_FEATURE_BACKENDS
69	# define EV_USE_POLL 1
70	# else
71	# define EV_USE_POLL 0
72	# endif	96	# endif
		97	# else
		98	# undef EV_USE_SELECT
		99	# define EV_USE_SELECT 0
		100	# endif
		101
		102	# if HAVE_POLL && HAVE_POLL_H
		103	# ifndef EV_USE_POLL
		104	# define EV_USE_POLL EV_FEATURE_BACKENDS
		105	# endif
		106	# else
		107	# undef EV_USE_POLL
		108	# define EV_USE_POLL 0
73	# endif	109	# endif
74		110
75	# ifndef EV_USE_EPOLL
76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	111	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77	# define EV_USE_EPOLL 1	112	# ifndef EV_USE_EPOLL
78	# else	113	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
79	# define EV_USE_EPOLL 0
80	# endif	114	# endif
		115	# else
		116	# undef EV_USE_EPOLL
		117	# define EV_USE_EPOLL 0
81	# endif	118	# endif
82		119
		120	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
83	# ifndef EV_USE_KQUEUE	121	# ifndef EV_USE_KQUEUE
84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	122	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
85	# define EV_USE_KQUEUE 1
86	# else
87	# define EV_USE_KQUEUE 0
88	# endif	123	# endif
		124	# else
		125	# undef EV_USE_KQUEUE
		126	# define EV_USE_KQUEUE 0
89	# endif	127	# endif
90		128
91	# ifndef EV_USE_PORT
92	# if HAVE_PORT_H && HAVE_PORT_CREATE	129	# if HAVE_PORT_H && HAVE_PORT_CREATE
93	# define EV_USE_PORT 1	130	# ifndef EV_USE_PORT
94	# else	131	# define EV_USE_PORT EV_FEATURE_BACKENDS
95	# define EV_USE_PORT 0
96	# endif	132	# endif
		133	# else
		134	# undef EV_USE_PORT
		135	# define EV_USE_PORT 0
97	# endif	136	# endif
98		137
99	# ifndef EV_USE_INOTIFY
100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H	138	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101	# define EV_USE_INOTIFY 1	139	# ifndef EV_USE_INOTIFY
102	# else
103	# define EV_USE_INOTIFY 0	140	# define EV_USE_INOTIFY EV_FEATURE_OS
104	# endif	141	# endif
		142	# else
		143	# undef EV_USE_INOTIFY
		144	# define EV_USE_INOTIFY 0
105	# endif	145	# endif
106		146
		147	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		148	# ifndef EV_USE_SIGNALFD
		149	# define EV_USE_SIGNALFD EV_FEATURE_OS
		150	# endif
		151	# else
		152	# undef EV_USE_SIGNALFD
		153	# define EV_USE_SIGNALFD 0
107	#endif	154	# endif
108		155
109	#include <math.h>	156	# if HAVE_EVENTFD
		157	# ifndef EV_USE_EVENTFD
		158	# define EV_USE_EVENTFD EV_FEATURE_OS
		159	# endif
		160	# else
		161	# undef EV_USE_EVENTFD
		162	# define EV_USE_EVENTFD 0
		163	# endif
		164
		165	#endif
		166
110	#include <stdlib.h>	167	#include <stdlib.h>
		168	#include <string.h>
111	#include <fcntl.h>	169	#include <fcntl.h>
112	#include <stddef.h>	170	#include <stddef.h>
113		171
114	#include <stdio.h>	172	#include <stdio.h>
115		173
116	#include <assert.h>	174	#include <assert.h>
117	#include <errno.h>	175	#include <errno.h>
118	#include <sys/types.h>	176	#include <sys/types.h>
119	#include <time.h>	177	#include <time.h>
		178	#include <limits.h>
120		179
121	#include <signal.h>	180	#include <signal.h>
122		181
123	#ifdef EV_H	182	#ifdef EV_H
124	# include EV_H	183	# include EV_H
125	#else	184	#else
126	# include "ev.h"	185	# include "ev.h"
127	#endif	186	#endif
		187
		188	EV_CPP(extern "C" {)
128		189
129	#ifndef _WIN32	190	#ifndef _WIN32
130	# include <sys/time.h>	191	# include <sys/time.h>
131	# include <sys/wait.h>	192	# include <sys/wait.h>
132	# include <unistd.h>	193	# include <unistd.h>
133	#else	194	#else
		195	# include <io.h>
134	# define WIN32_LEAN_AND_MEAN	196	# define WIN32_LEAN_AND_MEAN
135	# include <windows.h>	197	# include <windows.h>
136	# ifndef EV_SELECT_IS_WINSOCKET	198	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	199	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	200	# endif
		201	# undef EV_AVOID_STDIO
		202	#endif
		203
		204	/* OS X, in its infinite idiocy, actually HARDCODES
		205	* a limit of 1024 into their select. Where people have brains,
		206	* OS X engineers apparently have a vacuum. Or maybe they were
		207	* ordered to have a vacuum, or they do anything for money.
		208	* This might help. Or not.
		209	*/
		210	#define _DARWIN_UNLIMITED_SELECT 1
		211
		212	/* this block tries to deduce configuration from header-defined symbols and defaults */
		213
		214	/* try to deduce the maximum number of signals on this platform */
		215	#if defined (EV_NSIG)
		216	/* use what's provided */
		217	#elif defined (NSIG)
		218	# define EV_NSIG (NSIG)
		219	#elif defined(_NSIG)
		220	# define EV_NSIG (_NSIG)
		221	#elif defined (SIGMAX)
		222	# define EV_NSIG (SIGMAX+1)
		223	#elif defined (SIG_MAX)
		224	# define EV_NSIG (SIG_MAX+1)
		225	#elif defined (_SIG_MAX)
		226	# define EV_NSIG (_SIG_MAX+1)
		227	#elif defined (MAXSIG)
		228	# define EV_NSIG (MAXSIG+1)
		229	#elif defined (MAX_SIG)
		230	# define EV_NSIG (MAX_SIG+1)
		231	#elif defined (SIGARRAYSIZE)
		232	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		233	#elif defined (_sys_nsig)
		234	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		235	#else
		236	# error "unable to find value for NSIG, please report"
		237	/* to make it compile regardless, just remove the above line, */
		238	/* but consider reporting it, too! :) */
		239	# define EV_NSIG 65
		240	#endif
		241
		242	#ifndef EV_USE_FLOOR
		243	# define EV_USE_FLOOR 0
		244	#endif
		245
		246	#ifndef EV_USE_CLOCK_SYSCALL
		247	# if __linux && __GLIBC__ >= 2
		248	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
		249	# else
		250	# define EV_USE_CLOCK_SYSCALL 0
139	#endif	251	# endif
140		252	#endif
141	/**/
142		253
143	#ifndef EV_USE_MONOTONIC	254	#ifndef EV_USE_MONOTONIC
		255	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		256	# define EV_USE_MONOTONIC EV_FEATURE_OS
		257	# else
144	# define EV_USE_MONOTONIC 0	258	# define EV_USE_MONOTONIC 0
		259	# endif
145	#endif	260	#endif
146		261
147	#ifndef EV_USE_REALTIME	262	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	263	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
		264	#endif
		265
		266	#ifndef EV_USE_NANOSLEEP
		267	# if _POSIX_C_SOURCE >= 199309L
		268	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		269	# else
		270	# define EV_USE_NANOSLEEP 0
		271	# endif
149	#endif	272	#endif
150		273
151	#ifndef EV_USE_SELECT	274	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	275	# define EV_USE_SELECT EV_FEATURE_BACKENDS
153	#endif	276	#endif
154		277
155	#ifndef EV_USE_POLL	278	#ifndef EV_USE_POLL
156	# ifdef _WIN32	279	# ifdef _WIN32
157	# define EV_USE_POLL 0	280	# define EV_USE_POLL 0
158	# else	281	# else
159	# define EV_USE_POLL 1	282	# define EV_USE_POLL EV_FEATURE_BACKENDS
160	# endif	283	# endif
161	#endif	284	#endif
162		285
163	#ifndef EV_USE_EPOLL	286	#ifndef EV_USE_EPOLL
		287	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		288	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		289	# else
164	# define EV_USE_EPOLL 0	290	# define EV_USE_EPOLL 0
		291	# endif
165	#endif	292	#endif
166		293
167	#ifndef EV_USE_KQUEUE	294	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	295	# define EV_USE_KQUEUE 0
169	#endif	296	#endif
…		…
171	#ifndef EV_USE_PORT	298	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	299	# define EV_USE_PORT 0
173	#endif	300	#endif
174		301
175	#ifndef EV_USE_INOTIFY	302	#ifndef EV_USE_INOTIFY
		303	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		304	# define EV_USE_INOTIFY EV_FEATURE_OS
		305	# else
176	# define EV_USE_INOTIFY 0	306	# define EV_USE_INOTIFY 0
		307	# endif
177	#endif	308	#endif
178		309
179	#ifndef EV_PID_HASHSIZE	310	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	311	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
181	# define EV_PID_HASHSIZE 1	312	#endif
		313
		314	#ifndef EV_INOTIFY_HASHSIZE
		315	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		316	#endif
		317
		318	#ifndef EV_USE_EVENTFD
		319	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		320	# define EV_USE_EVENTFD EV_FEATURE_OS
182	# else	321	# else
183	# define EV_PID_HASHSIZE 16	322	# define EV_USE_EVENTFD 0
184	# endif	323	# endif
185	#endif	324	#endif
186		325
187	#ifndef EV_INOTIFY_HASHSIZE	326	#ifndef EV_USE_SIGNALFD
188	# if EV_MINIMAL	327	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
189	# define EV_INOTIFY_HASHSIZE 1	328	# define EV_USE_SIGNALFD EV_FEATURE_OS
190	# else	329	# else
191	# define EV_INOTIFY_HASHSIZE 16	330	# define EV_USE_SIGNALFD 0
192	# endif	331	# endif
193	#endif	332	#endif
194		333
195	/**/	334	#if 0 /* debugging */
		335	# define EV_VERIFY 3
		336	# define EV_USE_4HEAP 1
		337	# define EV_HEAP_CACHE_AT 1
		338	#endif
		339
		340	#ifndef EV_VERIFY
		341	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
		342	#endif
		343
		344	#ifndef EV_USE_4HEAP
		345	# define EV_USE_4HEAP EV_FEATURE_DATA
		346	#endif
		347
		348	#ifndef EV_HEAP_CACHE_AT
		349	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
		350	#endif
		351
		352	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		353	/* which makes programs even slower. might work on other unices, too. */
		354	#if EV_USE_CLOCK_SYSCALL
		355	# include <syscall.h>
		356	# ifdef SYS_clock_gettime
		357	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		358	# undef EV_USE_MONOTONIC
		359	# define EV_USE_MONOTONIC 1
		360	# else
		361	# undef EV_USE_CLOCK_SYSCALL
		362	# define EV_USE_CLOCK_SYSCALL 0
		363	# endif
		364	#endif
		365
		366	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		367
		368	#ifdef _AIX
		369	/* AIX has a completely broken poll.h header */
		370	# undef EV_USE_POLL
		371	# define EV_USE_POLL 0
		372	#endif
196		373
197	#ifndef CLOCK_MONOTONIC	374	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	375	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	376	# define EV_USE_MONOTONIC 0
200	#endif	377	#endif
…		…
207	#if !EV_STAT_ENABLE	384	#if !EV_STAT_ENABLE
208	# undef EV_USE_INOTIFY	385	# undef EV_USE_INOTIFY
209	# define EV_USE_INOTIFY 0	386	# define EV_USE_INOTIFY 0
210	#endif	387	#endif
211		388
		389	#if !EV_USE_NANOSLEEP
		390	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		391	# if !defined(_WIN32) && !defined(__hpux)
		392	# include <sys/select.h>
		393	# endif
		394	#endif
		395
212	#if EV_USE_INOTIFY	396	#if EV_USE_INOTIFY
		397	# include <sys/statfs.h>
213	# include <sys/inotify.h>	398	# include <sys/inotify.h>
		399	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		400	# ifndef IN_DONT_FOLLOW
		401	# undef EV_USE_INOTIFY
		402	# define EV_USE_INOTIFY 0
		403	# endif
214	#endif	404	#endif
215		405
216	#if EV_SELECT_IS_WINSOCKET	406	#if EV_SELECT_IS_WINSOCKET
217	# include <winsock.h>	407	# include <winsock.h>
218	#endif	408	#endif
219		409
		410	#if EV_USE_EVENTFD
		411	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		412	# include <stdint.h>
		413	# ifndef EFD_NONBLOCK
		414	# define EFD_NONBLOCK O_NONBLOCK
		415	# endif
		416	# ifndef EFD_CLOEXEC
		417	# ifdef O_CLOEXEC
		418	# define EFD_CLOEXEC O_CLOEXEC
		419	# else
		420	# define EFD_CLOEXEC 02000000
		421	# endif
		422	# endif
		423	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
		424	#endif
		425
		426	#if EV_USE_SIGNALFD
		427	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		428	# include <stdint.h>
		429	# ifndef SFD_NONBLOCK
		430	# define SFD_NONBLOCK O_NONBLOCK
		431	# endif
		432	# ifndef SFD_CLOEXEC
		433	# ifdef O_CLOEXEC
		434	# define SFD_CLOEXEC O_CLOEXEC
		435	# else
		436	# define SFD_CLOEXEC 02000000
		437	# endif
		438	# endif
		439	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
		440
		441	struct signalfd_siginfo
		442	{
		443	uint32_t ssi_signo;
		444	char pad[128 - sizeof (uint32_t)];
		445	};
		446	#endif
		447
220	/**/	448	/**/
221		449
		450	#if EV_VERIFY >= 3
		451	# define EV_FREQUENT_CHECK ev_verify (EV_A)
		452	#else
		453	# define EV_FREQUENT_CHECK do { } while (0)
		454	#endif
		455
222	/*	456	/*
223	* This is used to avoid floating point rounding problems.	457	* This is used to work around floating point rounding problems.
224	* It is added to ev_rt_now when scheduling periodics
225	* to ensure progress, time-wise, even when rounding
226	* errors are against us.
227	* This value is good at least till the year 4000.	458	* This value is good at least till the year 4000.
228	* Better solutions welcome.
229	*/	459	*/
230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	460	#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
		461	/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
231		462
232	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	463	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
233	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	464	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
234	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */	465
		466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
		467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
235		468
236	#if __GNUC__ >= 4	469	#if __GNUC__ >= 4
237	# define expect(expr,value) __builtin_expect ((expr),(value))	470	# define expect(expr,value) __builtin_expect ((expr),(value))
238	# define noinline __attribute__ ((noinline))	471	# define noinline __attribute__ ((noinline))
239	#else	472	#else
240	# define expect(expr,value) (expr)	473	# define expect(expr,value) (expr)
241	# define noinline	474	# define noinline
242	# if __STDC_VERSION__ < 199901L	475	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
243	# define inline	476	# define inline
244	# endif	477	# endif
245	#endif	478	#endif
246		479
247	#define expect_false(expr) expect ((expr) != 0, 0)	480	#define expect_false(expr) expect ((expr) != 0, 0)
248	#define expect_true(expr) expect ((expr) != 0, 1)	481	#define expect_true(expr) expect ((expr) != 0, 1)
249	#define inline_size static inline	482	#define inline_size static inline
250		483
251	#if EV_MINIMAL	484	#if EV_FEATURE_CODE
		485	# define inline_speed static inline
		486	#else
252	# define inline_speed static noinline	487	# define inline_speed static noinline
		488	#endif
		489
		490	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		491
		492	#if EV_MINPRI == EV_MAXPRI
		493	# define ABSPRI(w) (((W)w), 0)
253	#else	494	#else
254	# define inline_speed static inline
255	#endif
256
257	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
258	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	495	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		496	#endif
259		497
260	#define EMPTY /* required for microsofts broken pseudo-c compiler */	498	#define EMPTY /* required for microsofts broken pseudo-c compiler */
261	#define EMPTY2(a,b) /* used to suppress some warnings */	499	#define EMPTY2(a,b) /* used to suppress some warnings */
262		500
263	typedef ev_watcher *W;	501	typedef ev_watcher *W;
264	typedef ev_watcher_list *WL;	502	typedef ev_watcher_list *WL;
265	typedef ev_watcher_time *WT;	503	typedef ev_watcher_time *WT;
266		504
		505	#define ev_active(w) ((W)(w))->active
		506	#define ev_at(w) ((WT)(w))->at
		507
		508	#if EV_USE_REALTIME
		509	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		510	/* giving it a reasonably high chance of working on typical architectures */
		511	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		512	#endif
		513
		514	#if EV_USE_MONOTONIC
267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	515	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		516	#endif
		517
		518	#ifndef EV_FD_TO_WIN32_HANDLE
		519	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		520	#endif
		521	#ifndef EV_WIN32_HANDLE_TO_FD
		522	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		523	#endif
		524	#ifndef EV_WIN32_CLOSE_FD
		525	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		526	#endif
268		527
269	#ifdef _WIN32	528	#ifdef _WIN32
270	# include "ev_win32.c"	529	# include "ev_win32.c"
271	#endif	530	#endif
272		531
273	/*****************************************************************************/	532	/*****************************************************************************/
274		533
		534	/* define a suitable floor function (only used by periodics atm) */
		535
		536	#if EV_USE_FLOOR
		537	# include <math.h>
		538	# define ev_floor(v) floor (v)
		539	#else
		540
		541	#include <float.h>
		542
		543	/* a floor() replacement function, should be independent of ev_tstamp type */
		544	static ev_tstamp noinline
		545	ev_floor (ev_tstamp v)
		546	{
		547	/* the choice of shift factor is not terribly important */
		548	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		549	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		550	#else
		551	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		552	#endif
		553
		554	/* argument too large for an unsigned long? */
		555	if (expect_false (v >= shift))
		556	{
		557	ev_tstamp f;
		558
		559	if (v == v - 1.)
		560	return v; /* very large number */
		561
		562	f = shift * ev_floor (v * (1. / shift));
		563	return f + ev_floor (v - f);
		564	}
		565
		566	/* special treatment for negative args? */
		567	if (expect_false (v < 0.))
		568	{
		569	ev_tstamp f = -ev_floor (-v);
		570
		571	return f - (f == v ? 0 : 1);
		572	}
		573
		574	/* fits into an unsigned long */
		575	return (unsigned long)v;
		576	}
		577
		578	#endif
		579
		580	/*****************************************************************************/
		581
		582	#ifdef __linux
		583	# include <sys/utsname.h>
		584	#endif
		585
		586	static unsigned int noinline
		587	ev_linux_version (void)
		588	{
		589	#ifdef __linux
		590	unsigned int v = 0;
		591	struct utsname buf;
		592	int i;
		593	char *p = buf.release;
		594
		595	if (uname (&buf))
		596	return 0;
		597
		598	for (i = 3+1; --i; )
		599	{
		600	unsigned int c = 0;
		601
		602	for (;;)
		603	{
		604	if (*p >= '0' && *p <= '9')
		605	c = c * 10 + *p++ - '0';
		606	else
		607	{
		608	p += *p == '.';
		609	break;
		610	}
		611	}
		612
		613	v = (v << 8) | c;
		614	}
		615
		616	return v;
		617	#else
		618	return 0;
		619	#endif
		620	}
		621
		622	/*****************************************************************************/
		623
		624	#if EV_AVOID_STDIO
		625	static void noinline
		626	ev_printerr (const char *msg)
		627	{
		628	write (STDERR_FILENO, msg, strlen (msg));
		629	}
		630	#endif
		631
275	static void (*syserr_cb)(const char *msg);	632	static void (*syserr_cb)(const char *msg);
276		633
277	void	634	void
278	ev_set_syserr_cb (void (*cb)(const char *msg))	635	ev_set_syserr_cb (void (*cb)(const char *msg))
279	{	636	{
280	syserr_cb = cb;	637	syserr_cb = cb;
281	}	638	}
282		639
283	static void noinline	640	static void noinline
284	syserr (const char *msg)	641	ev_syserr (const char *msg)
285	{	642	{
286	if (!msg)	643	if (!msg)
287	msg = "(libev) system error";	644	msg = "(libev) system error";
288		645
289	if (syserr_cb)	646	if (syserr_cb)
290	syserr_cb (msg);	647	syserr_cb (msg);
291	else	648	else
292	{	649	{
		650	#if EV_AVOID_STDIO
		651	ev_printerr (msg);
		652	ev_printerr (": ");
		653	ev_printerr (strerror (errno));
		654	ev_printerr ("\n");
		655	#else
293	perror (msg);	656	perror (msg);
		657	#endif
294	abort ();	658	abort ();
295	}	659	}
296	}	660	}
297		661
		662	static void *
		663	ev_realloc_emul (void *ptr, long size)
		664	{
		665	#if __GLIBC__
		666	return realloc (ptr, size);
		667	#else
		668	/* some systems, notably openbsd and darwin, fail to properly
		669	* implement realloc (x, 0) (as required by both ansi c-89 and
		670	* the single unix specification, so work around them here.
		671	*/
		672
		673	if (size)
		674	return realloc (ptr, size);
		675
		676	free (ptr);
		677	return 0;
		678	#endif
		679	}
		680
298	static void *(*alloc)(void *ptr, long size);	681	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
299		682
300	void	683	void
301	ev_set_allocator (void *(*cb)(void *ptr, long size))	684	ev_set_allocator (void *(*cb)(void *ptr, long size))
302	{	685	{
303	alloc = cb;	686	alloc = cb;
304	}	687	}
305		688
306	inline_speed void *	689	inline_speed void *
307	ev_realloc (void *ptr, long size)	690	ev_realloc (void *ptr, long size)
308	{	691	{
309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	692	ptr = alloc (ptr, size);
310		693
311	if (!ptr && size)	694	if (!ptr && size)
312	{	695	{
		696	#if EV_AVOID_STDIO
		697	ev_printerr ("(libev) memory allocation failed, aborting.\n");
		698	#else
313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	699	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
		700	#endif
314	abort ();	701	abort ();
315	}	702	}
316		703
317	return ptr;	704	return ptr;
318	}	705	}
…		…
320	#define ev_malloc(size) ev_realloc (0, (size))	707	#define ev_malloc(size) ev_realloc (0, (size))
321	#define ev_free(ptr) ev_realloc ((ptr), 0)	708	#define ev_free(ptr) ev_realloc ((ptr), 0)
322		709
323	/*****************************************************************************/	710	/*****************************************************************************/
324		711
		712	/* set in reify when reification needed */
		713	#define EV_ANFD_REIFY 1
		714
		715	/* file descriptor info structure */
325	typedef struct	716	typedef struct
326	{	717	{
327	WL head;	718	WL head;
328	unsigned char events;	719	unsigned char events; /* the events watched for */
		720	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		721	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
329	unsigned char reify;	722	unsigned char unused;
		723	#if EV_USE_EPOLL
		724	unsigned int egen; /* generation counter to counter epoll bugs */
		725	#endif
330	#if EV_SELECT_IS_WINSOCKET	726	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
331	SOCKET handle;	727	SOCKET handle;
332	#endif	728	#endif
		729	#if EV_USE_IOCP
		730	OVERLAPPED or, ow;
		731	#endif
333	} ANFD;	732	} ANFD;
334		733
		734	/* stores the pending event set for a given watcher */
335	typedef struct	735	typedef struct
336	{	736	{
337	W w;	737	W w;
338	int events;	738	int events; /* the pending event set for the given watcher */
339	} ANPENDING;	739	} ANPENDING;
340		740
341	#if EV_USE_INOTIFY	741	#if EV_USE_INOTIFY
		742	/* hash table entry per inotify-id */
342	typedef struct	743	typedef struct
343	{	744	{
344	WL head;	745	WL head;
345	} ANFS;	746	} ANFS;
		747	#endif
		748
		749	/* Heap Entry */
		750	#if EV_HEAP_CACHE_AT
		751	/* a heap element */
		752	typedef struct {
		753	ev_tstamp at;
		754	WT w;
		755	} ANHE;
		756
		757	#define ANHE_w(he) (he).w /* access watcher, read-write */
		758	#define ANHE_at(he) (he).at /* access cached at, read-only */
		759	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		760	#else
		761	/* a heap element */
		762	typedef WT ANHE;
		763
		764	#define ANHE_w(he) (he)
		765	#define ANHE_at(he) (he)->at
		766	#define ANHE_at_cache(he)
346	#endif	767	#endif
347		768
348	#if EV_MULTIPLICITY	769	#if EV_MULTIPLICITY
349		770
350	struct ev_loop	771	struct ev_loop
…		…
369		790
370	static int ev_default_loop_ptr;	791	static int ev_default_loop_ptr;
371		792
372	#endif	793	#endif
373		794
		795	#if EV_FEATURE_API
		796	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		797	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		798	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		799	#else
		800	# define EV_RELEASE_CB (void)0
		801	# define EV_ACQUIRE_CB (void)0
		802	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		803	#endif
		804
		805	#define EVBREAK_RECURSE 0x80
		806
374	/*****************************************************************************/	807	/*****************************************************************************/
375		808
		809	#ifndef EV_HAVE_EV_TIME
376	ev_tstamp	810	ev_tstamp
377	ev_time (void)	811	ev_time (void)
378	{	812	{
379	#if EV_USE_REALTIME	813	#if EV_USE_REALTIME
		814	if (expect_true (have_realtime))
		815	{
380	struct timespec ts;	816	struct timespec ts;
381	clock_gettime (CLOCK_REALTIME, &ts);	817	clock_gettime (CLOCK_REALTIME, &ts);
382	return ts.tv_sec + ts.tv_nsec * 1e-9;	818	return ts.tv_sec + ts.tv_nsec * 1e-9;
383	#else	819	}
		820	#endif
		821
384	struct timeval tv;	822	struct timeval tv;
385	gettimeofday (&tv, 0);	823	gettimeofday (&tv, 0);
386	return tv.tv_sec + tv.tv_usec * 1e-6;	824	return tv.tv_sec + tv.tv_usec * 1e-6;
387	#endif
388	}	825	}
		826	#endif
389		827
390	ev_tstamp inline_size	828	inline_size ev_tstamp
391	get_clock (void)	829	get_clock (void)
392	{	830	{
393	#if EV_USE_MONOTONIC	831	#if EV_USE_MONOTONIC
394	if (expect_true (have_monotonic))	832	if (expect_true (have_monotonic))
395	{	833	{
…		…
408	{	846	{
409	return ev_rt_now;	847	return ev_rt_now;
410	}	848	}
411	#endif	849	#endif
412		850
413	int inline_size	851	void
		852	ev_sleep (ev_tstamp delay)
		853	{
		854	if (delay > 0.)
		855	{
		856	#if EV_USE_NANOSLEEP
		857	struct timespec ts;
		858
		859	EV_TS_SET (ts, delay);
		860	nanosleep (&ts, 0);
		861	#elif defined(_WIN32)
		862	Sleep ((unsigned long)(delay * 1e3));
		863	#else
		864	struct timeval tv;
		865
		866	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		867	/* something not guaranteed by newer posix versions, but guaranteed */
		868	/* by older ones */
		869	EV_TV_SET (tv, delay);
		870	select (0, 0, 0, 0, &tv);
		871	#endif
		872	}
		873	}
		874
		875	/*****************************************************************************/
		876
		877	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		878
		879	/* find a suitable new size for the given array, */
		880	/* hopefully by rounding to a nice-to-malloc size */
		881	inline_size int
414	array_nextsize (int elem, int cur, int cnt)	882	array_nextsize (int elem, int cur, int cnt)
415	{	883	{
416	int ncur = cur + 1;	884	int ncur = cur + 1;
417		885
418	do	886	do
419	ncur <<= 1;	887	ncur <<= 1;
420	while (cnt > ncur);	888	while (cnt > ncur);
421		889
422	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	890	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
423	if (elem * ncur > 4096)	891	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
424	{	892	{
425	ncur *= elem;	893	ncur *= elem;
426	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	894	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
427	ncur = ncur - sizeof (void *) * 4;	895	ncur = ncur - sizeof (void *) * 4;
428	ncur /= elem;	896	ncur /= elem;
429	}	897	}
430		898
431	return ncur;	899	return ncur;
…		…
435	array_realloc (int elem, void *base, int *cur, int cnt)	903	array_realloc (int elem, void *base, int *cur, int cnt)
436	{	904	{
437	*cur = array_nextsize (elem, *cur, cnt);	905	*cur = array_nextsize (elem, *cur, cnt);
438	return ev_realloc (base, elem * *cur);	906	return ev_realloc (base, elem * *cur);
439	}	907	}
		908
		909	#define array_init_zero(base,count) \
		910	memset ((void *)(base), 0, sizeof (*(base)) * (count))
440		911
441	#define array_needsize(type,base,cur,cnt,init) \	912	#define array_needsize(type,base,cur,cnt,init) \
442	if (expect_false ((cnt) > (cur))) \	913	if (expect_false ((cnt) > (cur))) \
443	{ \	914	{ \
444	int ocur_ = (cur); \	915	int ocur_ = (cur); \
…		…
456	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	927	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
457	}	928	}
458	#endif	929	#endif
459		930
460	#define array_free(stem, idx) \	931	#define array_free(stem, idx) \
461	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	932	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
462		933
463	/*****************************************************************************/	934	/*****************************************************************************/
		935
		936	/* dummy callback for pending events */
		937	static void noinline
		938	pendingcb (EV_P_ ev_prepare *w, int revents)
		939	{
		940	}
464		941
465	void noinline	942	void noinline
466	ev_feed_event (EV_P_ void *w, int revents)	943	ev_feed_event (EV_P_ void *w, int revents)
467	{	944	{
468	W w_ = (W)w;	945	W w_ = (W)w;
…		…
477	pendings [pri][w_->pending - 1].w = w_;	954	pendings [pri][w_->pending - 1].w = w_;
478	pendings [pri][w_->pending - 1].events = revents;	955	pendings [pri][w_->pending - 1].events = revents;
479	}	956	}
480	}	957	}
481		958
482	void inline_speed	959	inline_speed void
		960	feed_reverse (EV_P_ W w)
		961	{
		962	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		963	rfeeds [rfeedcnt++] = w;
		964	}
		965
		966	inline_size void
		967	feed_reverse_done (EV_P_ int revents)
		968	{
		969	do
		970	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		971	while (rfeedcnt);
		972	}
		973
		974	inline_speed void
483	queue_events (EV_P_ W *events, int eventcnt, int type)	975	queue_events (EV_P_ W *events, int eventcnt, int type)
484	{	976	{
485	int i;	977	int i;
486		978
487	for (i = 0; i < eventcnt; ++i)	979	for (i = 0; i < eventcnt; ++i)
488	ev_feed_event (EV_A_ events [i], type);	980	ev_feed_event (EV_A_ events [i], type);
489	}	981	}
490		982
491	/*****************************************************************************/	983	/*****************************************************************************/
492		984
493	void inline_size	985	inline_speed void
494	anfds_init (ANFD *base, int count)
495	{
496	while (count--)
497	{
498	base->head = 0;
499	base->events = EV_NONE;
500	base->reify = 0;
501
502	++base;
503	}
504	}
505
506	void inline_speed
507	fd_event (EV_P_ int fd, int revents)	986	fd_event_nocheck (EV_P_ int fd, int revents)
508	{	987	{
509	ANFD *anfd = anfds + fd;	988	ANFD *anfd = anfds + fd;
510	ev_io *w;	989	ev_io *w;
511		990
512	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	991	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
516	if (ev)	995	if (ev)
517	ev_feed_event (EV_A_ (W)w, ev);	996	ev_feed_event (EV_A_ (W)w, ev);
518	}	997	}
519	}	998	}
520		999
		1000	/* do not submit kernel events for fds that have reify set */
		1001	/* because that means they changed while we were polling for new events */
		1002	inline_speed void
		1003	fd_event (EV_P_ int fd, int revents)
		1004	{
		1005	ANFD *anfd = anfds + fd;
		1006
		1007	if (expect_true (!anfd->reify))
		1008	fd_event_nocheck (EV_A_ fd, revents);
		1009	}
		1010
521	void	1011	void
522	ev_feed_fd_event (EV_P_ int fd, int revents)	1012	ev_feed_fd_event (EV_P_ int fd, int revents)
523	{	1013	{
524	if (fd >= 0 && fd < anfdmax)	1014	if (fd >= 0 && fd < anfdmax)
525	fd_event (EV_A_ fd, revents);	1015	fd_event_nocheck (EV_A_ fd, revents);
526	}	1016	}
527		1017
528	void inline_size	1018	/* make sure the external fd watch events are in-sync */
		1019	/* with the kernel/libev internal state */
		1020	inline_size void
529	fd_reify (EV_P)	1021	fd_reify (EV_P)
530	{	1022	{
531	int i;	1023	int i;
		1024
		1025	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		1026	for (i = 0; i < fdchangecnt; ++i)
		1027	{
		1028	int fd = fdchanges [i];
		1029	ANFD *anfd = anfds + fd;
		1030
		1031	if (anfd->reify & EV__IOFDSET && anfd->head)
		1032	{
		1033	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		1034
		1035	if (handle != anfd->handle)
		1036	{
		1037	unsigned long arg;
		1038
		1039	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		1040
		1041	/* handle changed, but fd didn't - we need to do it in two steps */
		1042	backend_modify (EV_A_ fd, anfd->events, 0);
		1043	anfd->events = 0;
		1044	anfd->handle = handle;
		1045	}
		1046	}
		1047	}
		1048	#endif
532		1049
533	for (i = 0; i < fdchangecnt; ++i)	1050	for (i = 0; i < fdchangecnt; ++i)
534	{	1051	{
535	int fd = fdchanges [i];	1052	int fd = fdchanges [i];
536	ANFD *anfd = anfds + fd;	1053	ANFD *anfd = anfds + fd;
537	ev_io *w;	1054	ev_io *w;
538		1055
539	unsigned char events = 0;	1056	unsigned char o_events = anfd->events;
		1057	unsigned char o_reify = anfd->reify;
540		1058
541	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1059	anfd->reify = 0;
542	events |= (unsigned char)w->events;
543		1060
544	#if EV_SELECT_IS_WINSOCKET	1061	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
545	if (events)
546	{	1062	{
547	unsigned long argp;	1063	anfd->events = 0;
548	anfd->handle = _get_osfhandle (fd);	1064
549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	1065	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		1066	anfd->events |= (unsigned char)w->events;
		1067
		1068	if (o_events != anfd->events)
		1069	o_reify = EV__IOFDSET; /* actually |= */
550	}	1070	}
551	#endif
552		1071
553	{	1072	if (o_reify & EV__IOFDSET)
554	unsigned char o_events = anfd->events;
555	unsigned char o_reify = anfd->reify;
556
557	anfd->reify = 0;
558	anfd->events = events;
559
560	if (o_events != events || o_reify & EV_IOFDSET)
561	backend_modify (EV_A_ fd, o_events, events);	1073	backend_modify (EV_A_ fd, o_events, anfd->events);
562	}
563	}	1074	}
564		1075
565	fdchangecnt = 0;	1076	fdchangecnt = 0;
566	}	1077	}
567		1078
568	void inline_size	1079	/* something about the given fd changed */
		1080	inline_size void
569	fd_change (EV_P_ int fd, int flags)	1081	fd_change (EV_P_ int fd, int flags)
570	{	1082	{
571	unsigned char reify = anfds [fd].reify;	1083	unsigned char reify = anfds [fd].reify;
572	anfds [fd].reify |= flags;	1084	anfds [fd].reify |= flags;
573		1085
…		…
577	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	1089	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
578	fdchanges [fdchangecnt - 1] = fd;	1090	fdchanges [fdchangecnt - 1] = fd;
579	}	1091	}
580	}	1092	}
581		1093
582	void inline_speed	1094	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		1095	inline_speed void
583	fd_kill (EV_P_ int fd)	1096	fd_kill (EV_P_ int fd)
584	{	1097	{
585	ev_io *w;	1098	ev_io *w;
586		1099
587	while ((w = (ev_io *)anfds [fd].head))	1100	while ((w = (ev_io *)anfds [fd].head))
…		…
589	ev_io_stop (EV_A_ w);	1102	ev_io_stop (EV_A_ w);
590	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1103	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
591	}	1104	}
592	}	1105	}
593		1106
594	int inline_size	1107	/* check whether the given fd is actually valid, for error recovery */
		1108	inline_size int
595	fd_valid (int fd)	1109	fd_valid (int fd)
596	{	1110	{
597	#ifdef _WIN32	1111	#ifdef _WIN32
598	return _get_osfhandle (fd) != -1;	1112	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
599	#else	1113	#else
600	return fcntl (fd, F_GETFD) != -1;	1114	return fcntl (fd, F_GETFD) != -1;
601	#endif	1115	#endif
602	}	1116	}
603		1117
…		…
607	{	1121	{
608	int fd;	1122	int fd;
609		1123
610	for (fd = 0; fd < anfdmax; ++fd)	1124	for (fd = 0; fd < anfdmax; ++fd)
611	if (anfds [fd].events)	1125	if (anfds [fd].events)
612	if (!fd_valid (fd) == -1 && errno == EBADF)	1126	if (!fd_valid (fd) && errno == EBADF)
613	fd_kill (EV_A_ fd);	1127	fd_kill (EV_A_ fd);
614	}	1128	}
615		1129
616	/* called on ENOMEM in select/poll to kill some fds and retry */	1130	/* called on ENOMEM in select/poll to kill some fds and retry */
617	static void noinline	1131	static void noinline
…		…
621		1135
622	for (fd = anfdmax; fd--; )	1136	for (fd = anfdmax; fd--; )
623	if (anfds [fd].events)	1137	if (anfds [fd].events)
624	{	1138	{
625	fd_kill (EV_A_ fd);	1139	fd_kill (EV_A_ fd);
626	return;	1140	break;
627	}	1141	}
628	}	1142	}
629		1143
630	/* usually called after fork if backend needs to re-arm all fds from scratch */	1144	/* usually called after fork if backend needs to re-arm all fds from scratch */
631	static void noinline	1145	static void noinline
…		…
635		1149
636	for (fd = 0; fd < anfdmax; ++fd)	1150	for (fd = 0; fd < anfdmax; ++fd)
637	if (anfds [fd].events)	1151	if (anfds [fd].events)
638	{	1152	{
639	anfds [fd].events = 0;	1153	anfds [fd].events = 0;
		1154	anfds [fd].emask = 0;
640	fd_change (EV_A_ fd, EV_IOFDSET | 1);	1155	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
641	}	1156	}
642	}	1157	}
643		1158
644	/*****************************************************************************/	1159	/* used to prepare libev internal fd's */
645		1160	/* this is not fork-safe */
646	void inline_speed	1161	inline_speed void
647	upheap (WT *heap, int k)
648	{
649	WT w = heap [k];
650
651	while (k)
652	{
653	int p = (k - 1) >> 1;
654
655	if (heap [p]->at <= w->at)
656	break;
657
658	heap [k] = heap [p];
659	((W)heap [k])->active = k + 1;
660	k = p;
661	}
662
663	heap [k] = w;
664	((W)heap [k])->active = k + 1;
665	}
666
667	void inline_speed
668	downheap (WT *heap, int N, int k)
669	{
670	WT w = heap [k];
671
672	for (;;)
673	{
674	int c = (k << 1) + 1;
675
676	if (c >= N)
677	break;
678
679	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
680	? 1 : 0;
681
682	if (w->at <= heap [c]->at)
683	break;
684
685	heap [k] = heap [c];
686	((W)heap [k])->active = k + 1;
687
688	k = c;
689	}
690
691	heap [k] = w;
692	((W)heap [k])->active = k + 1;
693	}
694
695	void inline_size
696	adjustheap (WT *heap, int N, int k)
697	{
698	upheap (heap, k);
699	downheap (heap, N, k);
700	}
701
702	/*****************************************************************************/
703
704	typedef struct
705	{
706	WL head;
707	sig_atomic_t volatile gotsig;
708	} ANSIG;
709
710	static ANSIG *signals;
711	static int signalmax;
712
713	static int sigpipe [2];
714	static sig_atomic_t volatile gotsig;
715	static ev_io sigev;
716
717	void inline_size
718	signals_init (ANSIG *base, int count)
719	{
720	while (count--)
721	{
722	base->head = 0;
723	base->gotsig = 0;
724
725	++base;
726	}
727	}
728
729	static void
730	sighandler (int signum)
731	{
732	#if _WIN32
733	signal (signum, sighandler);
734	#endif
735
736	signals [signum - 1].gotsig = 1;
737
738	if (!gotsig)
739	{
740	int old_errno = errno;
741	gotsig = 1;
742	write (sigpipe [1], &signum, 1);
743	errno = old_errno;
744	}
745	}
746
747	void noinline
748	ev_feed_signal_event (EV_P_ int signum)
749	{
750	WL w;
751
752	#if EV_MULTIPLICITY
753	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754	#endif
755
756	--signum;
757
758	if (signum < 0 || signum >= signalmax)
759	return;
760
761	signals [signum].gotsig = 0;
762
763	for (w = signals [signum].head; w; w = w->next)
764	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765	}
766
767	static void
768	sigcb (EV_P_ ev_io *iow, int revents)
769	{
770	int signum;
771
772	read (sigpipe [0], &revents, 1);
773	gotsig = 0;
774
775	for (signum = signalmax; signum--; )
776	if (signals [signum].gotsig)
777	ev_feed_signal_event (EV_A_ signum + 1);
778	}
779
780	void inline_speed
781	fd_intern (int fd)	1162	fd_intern (int fd)
782	{	1163	{
783	#ifdef _WIN32	1164	#ifdef _WIN32
784	int arg = 1;	1165	unsigned long arg = 1;
785	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1166	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
786	#else	1167	#else
787	fcntl (fd, F_SETFD, FD_CLOEXEC);	1168	fcntl (fd, F_SETFD, FD_CLOEXEC);
788	fcntl (fd, F_SETFL, O_NONBLOCK);	1169	fcntl (fd, F_SETFL, O_NONBLOCK);
789	#endif	1170	#endif
790	}	1171	}
791		1172
		1173	/*****************************************************************************/
		1174
		1175	/*
		1176	* the heap functions want a real array index. array index 0 is guaranteed to not
		1177	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		1178	* the branching factor of the d-tree.
		1179	*/
		1180
		1181	/*
		1182	* at the moment we allow libev the luxury of two heaps,
		1183	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		1184	* which is more cache-efficient.
		1185	* the difference is about 5% with 50000+ watchers.
		1186	*/
		1187	#if EV_USE_4HEAP
		1188
		1189	#define DHEAP 4
		1190	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		1191	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		1192	#define UPHEAP_DONE(p,k) ((p) == (k))
		1193
		1194	/* away from the root */
		1195	inline_speed void
		1196	downheap (ANHE *heap, int N, int k)
		1197	{
		1198	ANHE he = heap [k];
		1199	ANHE *E = heap + N + HEAP0;
		1200
		1201	for (;;)
		1202	{
		1203	ev_tstamp minat;
		1204	ANHE *minpos;
		1205	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		1206
		1207	/* find minimum child */
		1208	if (expect_true (pos + DHEAP - 1 < E))
		1209	{
		1210	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1211	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1212	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1213	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1214	}
		1215	else if (pos < E)
		1216	{
		1217	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1218	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1219	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1220	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1221	}
		1222	else
		1223	break;
		1224
		1225	if (ANHE_at (he) <= minat)
		1226	break;
		1227
		1228	heap [k] = *minpos;
		1229	ev_active (ANHE_w (*minpos)) = k;
		1230
		1231	k = minpos - heap;
		1232	}
		1233
		1234	heap [k] = he;
		1235	ev_active (ANHE_w (he)) = k;
		1236	}
		1237
		1238	#else /* 4HEAP */
		1239
		1240	#define HEAP0 1
		1241	#define HPARENT(k) ((k) >> 1)
		1242	#define UPHEAP_DONE(p,k) (!(p))
		1243
		1244	/* away from the root */
		1245	inline_speed void
		1246	downheap (ANHE *heap, int N, int k)
		1247	{
		1248	ANHE he = heap [k];
		1249
		1250	for (;;)
		1251	{
		1252	int c = k << 1;
		1253
		1254	if (c >= N + HEAP0)
		1255	break;
		1256
		1257	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		1258	? 1 : 0;
		1259
		1260	if (ANHE_at (he) <= ANHE_at (heap [c]))
		1261	break;
		1262
		1263	heap [k] = heap [c];
		1264	ev_active (ANHE_w (heap [k])) = k;
		1265
		1266	k = c;
		1267	}
		1268
		1269	heap [k] = he;
		1270	ev_active (ANHE_w (he)) = k;
		1271	}
		1272	#endif
		1273
		1274	/* towards the root */
		1275	inline_speed void
		1276	upheap (ANHE *heap, int k)
		1277	{
		1278	ANHE he = heap [k];
		1279
		1280	for (;;)
		1281	{
		1282	int p = HPARENT (k);
		1283
		1284	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		1285	break;
		1286
		1287	heap [k] = heap [p];
		1288	ev_active (ANHE_w (heap [k])) = k;
		1289	k = p;
		1290	}
		1291
		1292	heap [k] = he;
		1293	ev_active (ANHE_w (he)) = k;
		1294	}
		1295
		1296	/* move an element suitably so it is in a correct place */
		1297	inline_size void
		1298	adjustheap (ANHE *heap, int N, int k)
		1299	{
		1300	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
		1301	upheap (heap, k);
		1302	else
		1303	downheap (heap, N, k);
		1304	}
		1305
		1306	/* rebuild the heap: this function is used only once and executed rarely */
		1307	inline_size void
		1308	reheap (ANHE *heap, int N)
		1309	{
		1310	int i;
		1311
		1312	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		1313	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		1314	for (i = 0; i < N; ++i)
		1315	upheap (heap, i + HEAP0);
		1316	}
		1317
		1318	/*****************************************************************************/
		1319
		1320	/* associate signal watchers to a signal signal */
		1321	typedef struct
		1322	{
		1323	EV_ATOMIC_T pending;
		1324	#if EV_MULTIPLICITY
		1325	EV_P;
		1326	#endif
		1327	WL head;
		1328	} ANSIG;
		1329
		1330	static ANSIG signals [EV_NSIG - 1];
		1331
		1332	/*****************************************************************************/
		1333
		1334	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		1335
792	static void noinline	1336	static void noinline
793	siginit (EV_P)	1337	evpipe_init (EV_P)
794	{	1338	{
		1339	if (!ev_is_active (&pipe_w))
		1340	{
		1341	# if EV_USE_EVENTFD
		1342	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1343	if (evfd < 0 && errno == EINVAL)
		1344	evfd = eventfd (0, 0);
		1345
		1346	if (evfd >= 0)
		1347	{
		1348	evpipe [0] = -1;
		1349	fd_intern (evfd); /* doing it twice doesn't hurt */
		1350	ev_io_set (&pipe_w, evfd, EV_READ);
		1351	}
		1352	else
		1353	# endif
		1354	{
		1355	while (pipe (evpipe))
		1356	ev_syserr ("(libev) error creating signal/async pipe");
		1357
795	fd_intern (sigpipe [0]);	1358	fd_intern (evpipe [0]);
796	fd_intern (sigpipe [1]);	1359	fd_intern (evpipe [1]);
		1360	ev_io_set (&pipe_w, evpipe [0], EV_READ);
		1361	}
797		1362
798	ev_io_set (&sigev, sigpipe [0], EV_READ);
799	ev_io_start (EV_A_ &sigev);	1363	ev_io_start (EV_A_ &pipe_w);
800	ev_unref (EV_A); /* child watcher should not keep loop alive */	1364	ev_unref (EV_A); /* watcher should not keep loop alive */
		1365	}
		1366	}
		1367
		1368	inline_size void
		1369	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1370	{
		1371	if (!*flag)
		1372	{
		1373	int old_errno = errno; /* save errno because write might clobber it */
		1374	char dummy;
		1375
		1376	*flag = 1;
		1377
		1378	#if EV_USE_EVENTFD
		1379	if (evfd >= 0)
		1380	{
		1381	uint64_t counter = 1;
		1382	write (evfd, &counter, sizeof (uint64_t));
		1383	}
		1384	else
		1385	#endif
		1386	/* win32 people keep sending patches that change this write() to send() */
		1387	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1388	/* so when you think this write should be a send instead, please find out */
		1389	/* where your send() is from - it's definitely not the microsoft send, and */
		1390	/* tell me. thank you. */
		1391	write (evpipe [1], &dummy, 1);
		1392
		1393	errno = old_errno;
		1394	}
		1395	}
		1396
		1397	/* called whenever the libev signal pipe */
		1398	/* got some events (signal, async) */
		1399	static void
		1400	pipecb (EV_P_ ev_io *iow, int revents)
		1401	{
		1402	int i;
		1403
		1404	#if EV_USE_EVENTFD
		1405	if (evfd >= 0)
		1406	{
		1407	uint64_t counter;
		1408	read (evfd, &counter, sizeof (uint64_t));
		1409	}
		1410	else
		1411	#endif
		1412	{
		1413	char dummy;
		1414	/* see discussion in evpipe_write when you think this read should be recv in win32 */
		1415	read (evpipe [0], &dummy, 1);
		1416	}
		1417
		1418	#if EV_SIGNAL_ENABLE
		1419	if (sig_pending)
		1420	{
		1421	sig_pending = 0;
		1422
		1423	for (i = EV_NSIG - 1; i--; )
		1424	if (expect_false (signals [i].pending))
		1425	ev_feed_signal_event (EV_A_ i + 1);
		1426	}
		1427	#endif
		1428
		1429	#if EV_ASYNC_ENABLE
		1430	if (async_pending)
		1431	{
		1432	async_pending = 0;
		1433
		1434	for (i = asynccnt; i--; )
		1435	if (asyncs [i]->sent)
		1436	{
		1437	asyncs [i]->sent = 0;
		1438	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1439	}
		1440	}
		1441	#endif
801	}	1442	}
802		1443
803	/*****************************************************************************/	1444	/*****************************************************************************/
804		1445
		1446	void
		1447	ev_feed_signal (int signum)
		1448	{
		1449	#if EV_MULTIPLICITY
		1450	EV_P = signals [signum - 1].loop;
		1451
		1452	if (!EV_A)
		1453	return;
		1454	#endif
		1455
		1456	signals [signum - 1].pending = 1;
		1457	evpipe_write (EV_A_ &sig_pending);
		1458	}
		1459
		1460	static void
		1461	ev_sighandler (int signum)
		1462	{
		1463	#ifdef _WIN32
		1464	signal (signum, ev_sighandler);
		1465	#endif
		1466
		1467	ev_feed_signal (signum);
		1468	}
		1469
		1470	void noinline
		1471	ev_feed_signal_event (EV_P_ int signum)
		1472	{
		1473	WL w;
		1474
		1475	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1476	return;
		1477
		1478	--signum;
		1479
		1480	#if EV_MULTIPLICITY
		1481	/* it is permissible to try to feed a signal to the wrong loop */
		1482	/* or, likely more useful, feeding a signal nobody is waiting for */
		1483
		1484	if (expect_false (signals [signum].loop != EV_A))
		1485	return;
		1486	#endif
		1487
		1488	signals [signum].pending = 0;
		1489
		1490	for (w = signals [signum].head; w; w = w->next)
		1491	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1492	}
		1493
		1494	#if EV_USE_SIGNALFD
		1495	static void
		1496	sigfdcb (EV_P_ ev_io *iow, int revents)
		1497	{
		1498	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1499
		1500	for (;;)
		1501	{
		1502	ssize_t res = read (sigfd, si, sizeof (si));
		1503
		1504	/* not ISO-C, as res might be -1, but works with SuS */
		1505	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1506	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1507
		1508	if (res < (ssize_t)sizeof (si))
		1509	break;
		1510	}
		1511	}
		1512	#endif
		1513
		1514	#endif
		1515
		1516	/*****************************************************************************/
		1517
		1518	#if EV_CHILD_ENABLE
805	static WL childs [EV_PID_HASHSIZE];	1519	static WL childs [EV_PID_HASHSIZE];
806		1520
807	#ifndef _WIN32
808
809	static ev_signal childev;	1521	static ev_signal childev;
810		1522
811	void inline_speed	1523	#ifndef WIFCONTINUED
		1524	# define WIFCONTINUED(status) 0
		1525	#endif
		1526
		1527	/* handle a single child status event */
		1528	inline_speed void
812	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1529	child_reap (EV_P_ int chain, int pid, int status)
813	{	1530	{
814	ev_child *w;	1531	ev_child *w;
		1532	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815		1533
816	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1534	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		1535	{
817	if (w->pid == pid || !w->pid)	1536	if ((w->pid == pid || !w->pid)
		1537	&& (!traced || (w->flags & 1)))
818	{	1538	{
819	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1539	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820	w->rpid = pid;	1540	w->rpid = pid;
821	w->rstatus = status;	1541	w->rstatus = status;
822	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1542	ev_feed_event (EV_A_ (W)w, EV_CHILD);
823	}	1543	}
		1544	}
824	}	1545	}
825		1546
826	#ifndef WCONTINUED	1547	#ifndef WCONTINUED
827	# define WCONTINUED 0	1548	# define WCONTINUED 0
828	#endif	1549	#endif
829		1550
		1551	/* called on sigchld etc., calls waitpid */
830	static void	1552	static void
831	childcb (EV_P_ ev_signal *sw, int revents)	1553	childcb (EV_P_ ev_signal *sw, int revents)
832	{	1554	{
833	int pid, status;	1555	int pid, status;
834		1556
…		…
837	if (!WCONTINUED	1559	if (!WCONTINUED
838	|| errno != EINVAL	1560	|| errno != EINVAL
839	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1561	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840	return;	1562	return;
841		1563
842	/* make sure we are called again until all childs have been reaped */	1564	/* make sure we are called again until all children have been reaped */
843	/* we need to do it this way so that the callback gets called before we continue */	1565	/* we need to do it this way so that the callback gets called before we continue */
844	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1566	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845		1567
846	child_reap (EV_A_ sw, pid, pid, status);	1568	child_reap (EV_A_ pid, pid, status);
847	if (EV_PID_HASHSIZE > 1)	1569	if ((EV_PID_HASHSIZE) > 1)
848	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1570	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849	}	1571	}
850		1572
851	#endif	1573	#endif
852		1574
853	/*****************************************************************************/	1575	/*****************************************************************************/
854		1576
		1577	#if EV_USE_IOCP
		1578	# include "ev_iocp.c"
		1579	#endif
855	#if EV_USE_PORT	1580	#if EV_USE_PORT
856	# include "ev_port.c"	1581	# include "ev_port.c"
857	#endif	1582	#endif
858	#if EV_USE_KQUEUE	1583	#if EV_USE_KQUEUE
859	# include "ev_kqueue.c"	1584	# include "ev_kqueue.c"
…		…
915	/* kqueue is borked on everything but netbsd apparently */	1640	/* kqueue is borked on everything but netbsd apparently */
916	/* it usually doesn't work correctly on anything but sockets and pipes */	1641	/* it usually doesn't work correctly on anything but sockets and pipes */
917	flags &= ~EVBACKEND_KQUEUE;	1642	flags &= ~EVBACKEND_KQUEUE;
918	#endif	1643	#endif
919	#ifdef __APPLE__	1644	#ifdef __APPLE__
920	// flags &= ~EVBACKEND_KQUEUE; for documentation	1645	/* only select works correctly on that "unix-certified" platform */
921	flags &= ~EVBACKEND_POLL;	1646	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1647	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		1648	#endif
		1649	#ifdef __FreeBSD__
		1650	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
922	#endif	1651	#endif
923		1652
924	return flags;	1653	return flags;
925	}	1654	}
926		1655
927	unsigned int	1656	unsigned int
928	ev_embeddable_backends (void)	1657	ev_embeddable_backends (void)
929	{	1658	{
930	return EVBACKEND_EPOLL	1659	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931	| EVBACKEND_KQUEUE	1660
932	| EVBACKEND_PORT;	1661	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1662	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
		1663	flags &= ~EVBACKEND_EPOLL;
		1664
		1665	return flags;
933	}	1666	}
934		1667
935	unsigned int	1668	unsigned int
936	ev_backend (EV_P)	1669	ev_backend (EV_P)
937	{	1670	{
938	return backend;	1671	return backend;
939	}	1672	}
940		1673
		1674	#if EV_FEATURE_API
941	unsigned int	1675	unsigned int
942	ev_loop_count (EV_P)	1676	ev_iteration (EV_P)
943	{	1677	{
944	return loop_count;	1678	return loop_count;
945	}	1679	}
946		1680
		1681	unsigned int
		1682	ev_depth (EV_P)
		1683	{
		1684	return loop_depth;
		1685	}
		1686
		1687	void
		1688	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1689	{
		1690	io_blocktime = interval;
		1691	}
		1692
		1693	void
		1694	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1695	{
		1696	timeout_blocktime = interval;
		1697	}
		1698
		1699	void
		1700	ev_set_userdata (EV_P_ void *data)
		1701	{
		1702	userdata = data;
		1703	}
		1704
		1705	void *
		1706	ev_userdata (EV_P)
		1707	{
		1708	return userdata;
		1709	}
		1710
		1711	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1712	{
		1713	invoke_cb = invoke_pending_cb;
		1714	}
		1715
		1716	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1717	{
		1718	release_cb = release;
		1719	acquire_cb = acquire;
		1720	}
		1721	#endif
		1722
		1723	/* initialise a loop structure, must be zero-initialised */
947	static void noinline	1724	static void noinline
948	loop_init (EV_P_ unsigned int flags)	1725	loop_init (EV_P_ unsigned int flags)
949	{	1726	{
950	if (!backend)	1727	if (!backend)
951	{	1728	{
		1729	origflags = flags;
		1730
		1731	#if EV_USE_REALTIME
		1732	if (!have_realtime)
		1733	{
		1734	struct timespec ts;
		1735
		1736	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1737	have_realtime = 1;
		1738	}
		1739	#endif
		1740
952	#if EV_USE_MONOTONIC	1741	#if EV_USE_MONOTONIC
		1742	if (!have_monotonic)
953	{	1743	{
954	struct timespec ts;	1744	struct timespec ts;
		1745
955	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1746	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956	have_monotonic = 1;	1747	have_monotonic = 1;
957	}	1748	}
958	#endif	1749	#endif
959
960	ev_rt_now = ev_time ();
961	mn_now = get_clock ();
962	now_floor = mn_now;
963	rtmn_diff = ev_rt_now - mn_now;
964		1750
965	/* pid check not overridable via env */	1751	/* pid check not overridable via env */
966	#ifndef _WIN32	1752	#ifndef _WIN32
967	if (flags & EVFLAG_FORKCHECK)	1753	if (flags & EVFLAG_FORKCHECK)
968	curpid = getpid ();	1754	curpid = getpid ();
…		…
971	if (!(flags & EVFLAG_NOENV)	1757	if (!(flags & EVFLAG_NOENV)
972	&& !enable_secure ()	1758	&& !enable_secure ()
973	&& getenv ("LIBEV_FLAGS"))	1759	&& getenv ("LIBEV_FLAGS"))
974	flags = atoi (getenv ("LIBEV_FLAGS"));	1760	flags = atoi (getenv ("LIBEV_FLAGS"));
975		1761
976	if (!(flags & 0x0000ffffUL))	1762	ev_rt_now = ev_time ();
		1763	mn_now = get_clock ();
		1764	now_floor = mn_now;
		1765	rtmn_diff = ev_rt_now - mn_now;
		1766	#if EV_FEATURE_API
		1767	invoke_cb = ev_invoke_pending;
		1768	#endif
		1769
		1770	io_blocktime = 0.;
		1771	timeout_blocktime = 0.;
		1772	backend = 0;
		1773	backend_fd = -1;
		1774	sig_pending = 0;
		1775	#if EV_ASYNC_ENABLE
		1776	async_pending = 0;
		1777	#endif
		1778	#if EV_USE_INOTIFY
		1779	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
		1780	#endif
		1781	#if EV_USE_SIGNALFD
		1782	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
		1783	#endif
		1784
		1785	if (!(flags & EVBACKEND_MASK))
977	flags |= ev_recommended_backends ();	1786	flags |= ev_recommended_backends ();
978		1787
979	backend = 0;
980	backend_fd = -1;
981	#if EV_USE_INOTIFY	1788	#if EV_USE_IOCP
982	fs_fd = -2;	1789	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
983	#endif	1790	#endif
984
985	#if EV_USE_PORT	1791	#if EV_USE_PORT
986	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1792	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987	#endif	1793	#endif
988	#if EV_USE_KQUEUE	1794	#if EV_USE_KQUEUE
989	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1795	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
996	#endif	1802	#endif
997	#if EV_USE_SELECT	1803	#if EV_USE_SELECT
998	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1804	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999	#endif	1805	#endif
1000		1806
		1807	ev_prepare_init (&pending_w, pendingcb);
		1808
		1809	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1001	ev_init (&sigev, sigcb);	1810	ev_init (&pipe_w, pipecb);
1002	ev_set_priority (&sigev, EV_MAXPRI);	1811	ev_set_priority (&pipe_w, EV_MAXPRI);
		1812	#endif
1003	}	1813	}
1004	}	1814	}
1005		1815
1006	static void noinline	1816	/* free up a loop structure */
		1817	void
1007	loop_destroy (EV_P)	1818	ev_loop_destroy (EV_P)
1008	{	1819	{
1009	int i;	1820	int i;
		1821
		1822	#if EV_MULTIPLICITY
		1823	/* mimic free (0) */
		1824	if (!EV_A)
		1825	return;
		1826	#endif
		1827
		1828	#if EV_CLEANUP_ENABLE
		1829	/* queue cleanup watchers (and execute them) */
		1830	if (expect_false (cleanupcnt))
		1831	{
		1832	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1833	EV_INVOKE_PENDING;
		1834	}
		1835	#endif
		1836
		1837	#if EV_CHILD_ENABLE
		1838	if (ev_is_active (&childev))
		1839	{
		1840	ev_ref (EV_A); /* child watcher */
		1841	ev_signal_stop (EV_A_ &childev);
		1842	}
		1843	#endif
		1844
		1845	if (ev_is_active (&pipe_w))
		1846	{
		1847	/*ev_ref (EV_A);*/
		1848	/*ev_io_stop (EV_A_ &pipe_w);*/
		1849
		1850	#if EV_USE_EVENTFD
		1851	if (evfd >= 0)
		1852	close (evfd);
		1853	#endif
		1854
		1855	if (evpipe [0] >= 0)
		1856	{
		1857	EV_WIN32_CLOSE_FD (evpipe [0]);
		1858	EV_WIN32_CLOSE_FD (evpipe [1]);
		1859	}
		1860	}
		1861
		1862	#if EV_USE_SIGNALFD
		1863	if (ev_is_active (&sigfd_w))
		1864	close (sigfd);
		1865	#endif
1010		1866
1011	#if EV_USE_INOTIFY	1867	#if EV_USE_INOTIFY
1012	if (fs_fd >= 0)	1868	if (fs_fd >= 0)
1013	close (fs_fd);	1869	close (fs_fd);
1014	#endif	1870	#endif
1015		1871
1016	if (backend_fd >= 0)	1872	if (backend_fd >= 0)
1017	close (backend_fd);	1873	close (backend_fd);
1018		1874
		1875	#if EV_USE_IOCP
		1876	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1877	#endif
1019	#if EV_USE_PORT	1878	#if EV_USE_PORT
1020	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1879	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1021	#endif	1880	#endif
1022	#if EV_USE_KQUEUE	1881	#if EV_USE_KQUEUE
1023	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1882	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1038	#if EV_IDLE_ENABLE	1897	#if EV_IDLE_ENABLE
1039	array_free (idle, [i]);	1898	array_free (idle, [i]);
1040	#endif	1899	#endif
1041	}	1900	}
1042		1901
1043	ev_free (anfds); anfdmax = 0;	1902	ev_free (anfds); anfds = 0; anfdmax = 0;
1044		1903
1045	/* have to use the microsoft-never-gets-it-right macro */	1904	/* have to use the microsoft-never-gets-it-right macro */
		1905	array_free (rfeed, EMPTY);
1046	array_free (fdchange, EMPTY);	1906	array_free (fdchange, EMPTY);
1047	array_free (timer, EMPTY);	1907	array_free (timer, EMPTY);
1048	#if EV_PERIODIC_ENABLE	1908	#if EV_PERIODIC_ENABLE
1049	array_free (periodic, EMPTY);	1909	array_free (periodic, EMPTY);
1050	#endif	1910	#endif
1051	#if EV_FORK_ENABLE	1911	#if EV_FORK_ENABLE
1052	array_free (fork, EMPTY);	1912	array_free (fork, EMPTY);
1053	#endif	1913	#endif
		1914	#if EV_CLEANUP_ENABLE
		1915	array_free (cleanup, EMPTY);
		1916	#endif
1054	array_free (prepare, EMPTY);	1917	array_free (prepare, EMPTY);
1055	array_free (check, EMPTY);	1918	array_free (check, EMPTY);
		1919	#if EV_ASYNC_ENABLE
		1920	array_free (async, EMPTY);
		1921	#endif
1056		1922
1057	backend = 0;	1923	backend = 0;
1058	}
1059		1924
		1925	#if EV_MULTIPLICITY
		1926	if (ev_is_default_loop (EV_A))
		1927	#endif
		1928	ev_default_loop_ptr = 0;
		1929	#if EV_MULTIPLICITY
		1930	else
		1931	ev_free (EV_A);
		1932	#endif
		1933	}
		1934
		1935	#if EV_USE_INOTIFY
1060	void inline_size infy_fork (EV_P);	1936	inline_size void infy_fork (EV_P);
		1937	#endif
1061		1938
1062	void inline_size	1939	inline_size void
1063	loop_fork (EV_P)	1940	loop_fork (EV_P)
1064	{	1941	{
1065	#if EV_USE_PORT	1942	#if EV_USE_PORT
1066	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1943	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1067	#endif	1944	#endif
…		…
1073	#endif	1950	#endif
1074	#if EV_USE_INOTIFY	1951	#if EV_USE_INOTIFY
1075	infy_fork (EV_A);	1952	infy_fork (EV_A);
1076	#endif	1953	#endif
1077		1954
1078	if (ev_is_active (&sigev))	1955	if (ev_is_active (&pipe_w))
1079	{	1956	{
1080	/* default loop */	1957	/* this "locks" the handlers against writing to the pipe */
		1958	/* while we modify the fd vars */
		1959	sig_pending = 1;
		1960	#if EV_ASYNC_ENABLE
		1961	async_pending = 1;
		1962	#endif
1081		1963
1082	ev_ref (EV_A);	1964	ev_ref (EV_A);
1083	ev_io_stop (EV_A_ &sigev);	1965	ev_io_stop (EV_A_ &pipe_w);
1084	close (sigpipe [0]);
1085	close (sigpipe [1]);
1086		1966
1087	while (pipe (sigpipe))	1967	#if EV_USE_EVENTFD
1088	syserr ("(libev) error creating pipe");	1968	if (evfd >= 0)
		1969	close (evfd);
		1970	#endif
1089		1971
		1972	if (evpipe [0] >= 0)
		1973	{
		1974	EV_WIN32_CLOSE_FD (evpipe [0]);
		1975	EV_WIN32_CLOSE_FD (evpipe [1]);
		1976	}
		1977
		1978	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1090	siginit (EV_A);	1979	evpipe_init (EV_A);
		1980	/* now iterate over everything, in case we missed something */
		1981	pipecb (EV_A_ &pipe_w, EV_READ);
		1982	#endif
1091	}	1983	}
1092		1984
1093	postfork = 0;	1985	postfork = 0;
1094	}	1986	}
		1987
		1988	#if EV_MULTIPLICITY
		1989
		1990	struct ev_loop *
		1991	ev_loop_new (unsigned int flags)
		1992	{
		1993	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1994
		1995	memset (EV_A, 0, sizeof (struct ev_loop));
		1996	loop_init (EV_A_ flags);
		1997
		1998	if (ev_backend (EV_A))
		1999	return EV_A;
		2000
		2001	ev_free (EV_A);
		2002	return 0;
		2003	}
		2004
		2005	#endif /* multiplicity */
		2006
		2007	#if EV_VERIFY
		2008	static void noinline
		2009	verify_watcher (EV_P_ W w)
		2010	{
		2011	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		2012
		2013	if (w->pending)
		2014	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		2015	}
		2016
		2017	static void noinline
		2018	verify_heap (EV_P_ ANHE *heap, int N)
		2019	{
		2020	int i;
		2021
		2022	for (i = HEAP0; i < N + HEAP0; ++i)
		2023	{
		2024	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		2025	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		2026	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		2027
		2028	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		2029	}
		2030	}
		2031
		2032	static void noinline
		2033	array_verify (EV_P_ W *ws, int cnt)
		2034	{
		2035	while (cnt--)
		2036	{
		2037	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		2038	verify_watcher (EV_A_ ws [cnt]);
		2039	}
		2040	}
		2041	#endif
		2042
		2043	#if EV_FEATURE_API
		2044	void
		2045	ev_verify (EV_P)
		2046	{
		2047	#if EV_VERIFY
		2048	int i;
		2049	WL w;
		2050
		2051	assert (activecnt >= -1);
		2052
		2053	assert (fdchangemax >= fdchangecnt);
		2054	for (i = 0; i < fdchangecnt; ++i)
		2055	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		2056
		2057	assert (anfdmax >= 0);
		2058	for (i = 0; i < anfdmax; ++i)
		2059	for (w = anfds [i].head; w; w = w->next)
		2060	{
		2061	verify_watcher (EV_A_ (W)w);
		2062	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
		2063	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		2064	}
		2065
		2066	assert (timermax >= timercnt);
		2067	verify_heap (EV_A_ timers, timercnt);
		2068
		2069	#if EV_PERIODIC_ENABLE
		2070	assert (periodicmax >= periodiccnt);
		2071	verify_heap (EV_A_ periodics, periodiccnt);
		2072	#endif
		2073
		2074	for (i = NUMPRI; i--; )
		2075	{
		2076	assert (pendingmax [i] >= pendingcnt [i]);
		2077	#if EV_IDLE_ENABLE
		2078	assert (idleall >= 0);
		2079	assert (idlemax [i] >= idlecnt [i]);
		2080	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		2081	#endif
		2082	}
		2083
		2084	#if EV_FORK_ENABLE
		2085	assert (forkmax >= forkcnt);
		2086	array_verify (EV_A_ (W *)forks, forkcnt);
		2087	#endif
		2088
		2089	#if EV_CLEANUP_ENABLE
		2090	assert (cleanupmax >= cleanupcnt);
		2091	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2092	#endif
		2093
		2094	#if EV_ASYNC_ENABLE
		2095	assert (asyncmax >= asynccnt);
		2096	array_verify (EV_A_ (W *)asyncs, asynccnt);
		2097	#endif
		2098
		2099	#if EV_PREPARE_ENABLE
		2100	assert (preparemax >= preparecnt);
		2101	array_verify (EV_A_ (W *)prepares, preparecnt);
		2102	#endif
		2103
		2104	#if EV_CHECK_ENABLE
		2105	assert (checkmax >= checkcnt);
		2106	array_verify (EV_A_ (W *)checks, checkcnt);
		2107	#endif
		2108
		2109	# if 0
		2110	#if EV_CHILD_ENABLE
		2111	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		2112	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		2113	#endif
		2114	# endif
		2115	#endif
		2116	}
		2117	#endif
1095		2118
1096	#if EV_MULTIPLICITY	2119	#if EV_MULTIPLICITY
1097	struct ev_loop *	2120	struct ev_loop *
1098	ev_loop_new (unsigned int flags)
1099	{
1100	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1101
1102	memset (loop, 0, sizeof (struct ev_loop));
1103
1104	loop_init (EV_A_ flags);
1105
1106	if (ev_backend (EV_A))
1107	return loop;
1108
1109	return 0;
1110	}
1111
1112	void
1113	ev_loop_destroy (EV_P)
1114	{
1115	loop_destroy (EV_A);
1116	ev_free (loop);
1117	}
1118
1119	void
1120	ev_loop_fork (EV_P)
1121	{
1122	postfork = 1;
1123	}
1124
1125	#endif
1126
1127	#if EV_MULTIPLICITY
1128	struct ev_loop *
1129	ev_default_loop_init (unsigned int flags)
1130	#else	2121	#else
1131	int	2122	int
		2123	#endif
1132	ev_default_loop (unsigned int flags)	2124	ev_default_loop (unsigned int flags)
1133	#endif
1134	{	2125	{
1135	if (sigpipe [0] == sigpipe [1])
1136	if (pipe (sigpipe))
1137	return 0;
1138
1139	if (!ev_default_loop_ptr)	2126	if (!ev_default_loop_ptr)
1140	{	2127	{
1141	#if EV_MULTIPLICITY	2128	#if EV_MULTIPLICITY
1142	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	2129	EV_P = ev_default_loop_ptr = &default_loop_struct;
1143	#else	2130	#else
1144	ev_default_loop_ptr = 1;	2131	ev_default_loop_ptr = 1;
1145	#endif	2132	#endif
1146		2133
1147	loop_init (EV_A_ flags);	2134	loop_init (EV_A_ flags);
1148		2135
1149	if (ev_backend (EV_A))	2136	if (ev_backend (EV_A))
1150	{	2137	{
1151	siginit (EV_A);	2138	#if EV_CHILD_ENABLE
1152
1153	#ifndef _WIN32
1154	ev_signal_init (&childev, childcb, SIGCHLD);	2139	ev_signal_init (&childev, childcb, SIGCHLD);
1155	ev_set_priority (&childev, EV_MAXPRI);	2140	ev_set_priority (&childev, EV_MAXPRI);
1156	ev_signal_start (EV_A_ &childev);	2141	ev_signal_start (EV_A_ &childev);
1157	ev_unref (EV_A); /* child watcher should not keep loop alive */	2142	ev_unref (EV_A); /* child watcher should not keep loop alive */
1158	#endif	2143	#endif
…		…
1163		2148
1164	return ev_default_loop_ptr;	2149	return ev_default_loop_ptr;
1165	}	2150	}
1166		2151
1167	void	2152	void
1168	ev_default_destroy (void)	2153	ev_loop_fork (EV_P)
1169	{	2154	{
1170	#if EV_MULTIPLICITY	2155	postfork = 1; /* must be in line with ev_default_fork */
1171	struct ev_loop *loop = ev_default_loop_ptr;
1172	#endif
1173
1174	#ifndef _WIN32
1175	ev_ref (EV_A); /* child watcher */
1176	ev_signal_stop (EV_A_ &childev);
1177	#endif
1178
1179	ev_ref (EV_A); /* signal watcher */
1180	ev_io_stop (EV_A_ &sigev);
1181
1182	close (sigpipe [0]); sigpipe [0] = 0;
1183	close (sigpipe [1]); sigpipe [1] = 0;
1184
1185	loop_destroy (EV_A);
1186	}
1187
1188	void
1189	ev_default_fork (void)
1190	{
1191	#if EV_MULTIPLICITY
1192	struct ev_loop *loop = ev_default_loop_ptr;
1193	#endif
1194
1195	if (backend)
1196	postfork = 1;
1197	}	2156	}
1198		2157
1199	/*****************************************************************************/	2158	/*****************************************************************************/
1200		2159
1201	void	2160	void
1202	ev_invoke (EV_P_ void *w, int revents)	2161	ev_invoke (EV_P_ void *w, int revents)
1203	{	2162	{
1204	EV_CB_INVOKE ((W)w, revents);	2163	EV_CB_INVOKE ((W)w, revents);
1205	}	2164	}
1206		2165
1207	void inline_speed	2166	unsigned int
1208	call_pending (EV_P)	2167	ev_pending_count (EV_P)
		2168	{
		2169	int pri;
		2170	unsigned int count = 0;
		2171
		2172	for (pri = NUMPRI; pri--; )
		2173	count += pendingcnt [pri];
		2174
		2175	return count;
		2176	}
		2177
		2178	void noinline
		2179	ev_invoke_pending (EV_P)
1209	{	2180	{
1210	int pri;	2181	int pri;
1211		2182
1212	for (pri = NUMPRI; pri--; )	2183	for (pri = NUMPRI; pri--; )
1213	while (pendingcnt [pri])	2184	while (pendingcnt [pri])
1214	{	2185	{
1215	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2186	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1216		2187
1217	if (expect_true (p->w))
1218	{
1219	/*assert (("non-pending watcher on pending list", p->w->pending));*/
1220
1221	p->w->pending = 0;	2188	p->w->pending = 0;
1222	EV_CB_INVOKE (p->w, p->events);	2189	EV_CB_INVOKE (p->w, p->events);
1223	}	2190	EV_FREQUENT_CHECK;
1224	}	2191	}
1225	}	2192	}
1226		2193
1227	void inline_size
1228	timers_reify (EV_P)
1229	{
1230	while (timercnt && ((WT)timers [0])->at <= mn_now)
1231	{
1232	ev_timer *w = (ev_timer *)timers [0];
1233
1234	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1235
1236	/* first reschedule or stop timer */
1237	if (w->repeat)
1238	{
1239	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1240
1241	((WT)w)->at += w->repeat;
1242	if (((WT)w)->at < mn_now)
1243	((WT)w)->at = mn_now;
1244
1245	downheap (timers, timercnt, 0);
1246	}
1247	else
1248	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1249
1250	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1251	}
1252	}
1253
1254	#if EV_PERIODIC_ENABLE
1255	void inline_size
1256	periodics_reify (EV_P)
1257	{
1258	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1259	{
1260	ev_periodic *w = (ev_periodic *)periodics [0];
1261
1262	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1263
1264	/* first reschedule or stop timer */
1265	if (w->reschedule_cb)
1266	{
1267	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1268	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1269	downheap (periodics, periodiccnt, 0);
1270	}
1271	else if (w->interval)
1272	{
1273	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1274	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1275	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1276	downheap (periodics, periodiccnt, 0);
1277	}
1278	else
1279	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1280
1281	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1282	}
1283	}
1284
1285	static void noinline
1286	periodics_reschedule (EV_P)
1287	{
1288	int i;
1289
1290	/* adjust periodics after time jump */
1291	for (i = 0; i < periodiccnt; ++i)
1292	{
1293	ev_periodic *w = (ev_periodic *)periodics [i];
1294
1295	if (w->reschedule_cb)
1296	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1297	else if (w->interval)
1298	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1299	}
1300
1301	/* now rebuild the heap */
1302	for (i = periodiccnt >> 1; i--; )
1303	downheap (periodics, periodiccnt, i);
1304	}
1305	#endif
1306
1307	#if EV_IDLE_ENABLE	2194	#if EV_IDLE_ENABLE
1308	void inline_size	2195	/* make idle watchers pending. this handles the "call-idle */
		2196	/* only when higher priorities are idle" logic */
		2197	inline_size void
1309	idle_reify (EV_P)	2198	idle_reify (EV_P)
1310	{	2199	{
1311	if (expect_false (idleall))	2200	if (expect_false (idleall))
1312	{	2201	{
1313	int pri;	2202	int pri;
…		…
1325	}	2214	}
1326	}	2215	}
1327	}	2216	}
1328	#endif	2217	#endif
1329		2218
1330	void inline_speed	2219	/* make timers pending */
		2220	inline_size void
		2221	timers_reify (EV_P)
		2222	{
		2223	EV_FREQUENT_CHECK;
		2224
		2225	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		2226	{
		2227	do
		2228	{
		2229	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		2230
		2231	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		2232
		2233	/* first reschedule or stop timer */
		2234	if (w->repeat)
		2235	{
		2236	ev_at (w) += w->repeat;
		2237	if (ev_at (w) < mn_now)
		2238	ev_at (w) = mn_now;
		2239
		2240	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		2241
		2242	ANHE_at_cache (timers [HEAP0]);
		2243	downheap (timers, timercnt, HEAP0);
		2244	}
		2245	else
		2246	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2247
		2248	EV_FREQUENT_CHECK;
		2249	feed_reverse (EV_A_ (W)w);
		2250	}
		2251	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
		2252
		2253	feed_reverse_done (EV_A_ EV_TIMER);
		2254	}
		2255	}
		2256
		2257	#if EV_PERIODIC_ENABLE
		2258
		2259	static void noinline
		2260	periodic_recalc (EV_P_ ev_periodic *w)
		2261	{
		2262	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		2263	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		2264
		2265	/* the above almost always errs on the low side */
		2266	while (at <= ev_rt_now)
		2267	{
		2268	ev_tstamp nat = at + w->interval;
		2269
		2270	/* when resolution fails us, we use ev_rt_now */
		2271	if (expect_false (nat == at))
		2272	{
		2273	at = ev_rt_now;
		2274	break;
		2275	}
		2276
		2277	at = nat;
		2278	}
		2279
		2280	ev_at (w) = at;
		2281	}
		2282
		2283	/* make periodics pending */
		2284	inline_size void
		2285	periodics_reify (EV_P)
		2286	{
		2287	EV_FREQUENT_CHECK;
		2288
		2289	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		2290	{
		2291	int feed_count = 0;
		2292
		2293	do
		2294	{
		2295	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2296
		2297	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		2298
		2299	/* first reschedule or stop timer */
		2300	if (w->reschedule_cb)
		2301	{
		2302	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2303
		2304	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		2305
		2306	ANHE_at_cache (periodics [HEAP0]);
		2307	downheap (periodics, periodiccnt, HEAP0);
		2308	}
		2309	else if (w->interval)
		2310	{
		2311	periodic_recalc (EV_A_ w);
		2312	ANHE_at_cache (periodics [HEAP0]);
		2313	downheap (periodics, periodiccnt, HEAP0);
		2314	}
		2315	else
		2316	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2317
		2318	EV_FREQUENT_CHECK;
		2319	feed_reverse (EV_A_ (W)w);
		2320	}
		2321	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		2322
		2323	feed_reverse_done (EV_A_ EV_PERIODIC);
		2324	}
		2325	}
		2326
		2327	/* simply recalculate all periodics */
		2328	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		2329	static void noinline
		2330	periodics_reschedule (EV_P)
		2331	{
		2332	int i;
		2333
		2334	/* adjust periodics after time jump */
		2335	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		2336	{
		2337	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		2338
		2339	if (w->reschedule_cb)
		2340	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2341	else if (w->interval)
		2342	periodic_recalc (EV_A_ w);
		2343
		2344	ANHE_at_cache (periodics [i]);
		2345	}
		2346
		2347	reheap (periodics, periodiccnt);
		2348	}
		2349	#endif
		2350
		2351	/* adjust all timers by a given offset */
		2352	static void noinline
		2353	timers_reschedule (EV_P_ ev_tstamp adjust)
		2354	{
		2355	int i;
		2356
		2357	for (i = 0; i < timercnt; ++i)
		2358	{
		2359	ANHE *he = timers + i + HEAP0;
		2360	ANHE_w (*he)->at += adjust;
		2361	ANHE_at_cache (*he);
		2362	}
		2363	}
		2364
		2365	/* fetch new monotonic and realtime times from the kernel */
		2366	/* also detect if there was a timejump, and act accordingly */
		2367	inline_speed void
1331	time_update (EV_P_ ev_tstamp max_block)	2368	time_update (EV_P_ ev_tstamp max_block)
1332	{	2369	{
1333	int i;
1334
1335	#if EV_USE_MONOTONIC	2370	#if EV_USE_MONOTONIC
1336	if (expect_true (have_monotonic))	2371	if (expect_true (have_monotonic))
1337	{	2372	{
		2373	int i;
1338	ev_tstamp odiff = rtmn_diff;	2374	ev_tstamp odiff = rtmn_diff;
1339		2375
1340	mn_now = get_clock ();	2376	mn_now = get_clock ();
1341		2377
1342	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2378	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1358	* doesn't hurt either as we only do this on time-jumps or	2394	* doesn't hurt either as we only do this on time-jumps or
1359	* in the unlikely event of having been preempted here.	2395	* in the unlikely event of having been preempted here.
1360	*/	2396	*/
1361	for (i = 4; --i; )	2397	for (i = 4; --i; )
1362	{	2398	{
		2399	ev_tstamp diff;
1363	rtmn_diff = ev_rt_now - mn_now;	2400	rtmn_diff = ev_rt_now - mn_now;
1364		2401
1365	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	2402	diff = odiff - rtmn_diff;
		2403
		2404	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1366	return; /* all is well */	2405	return; /* all is well */
1367		2406
1368	ev_rt_now = ev_time ();	2407	ev_rt_now = ev_time ();
1369	mn_now = get_clock ();	2408	mn_now = get_clock ();
1370	now_floor = mn_now;	2409	now_floor = mn_now;
1371	}	2410	}
1372		2411
		2412	/* no timer adjustment, as the monotonic clock doesn't jump */
		2413	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1373	# if EV_PERIODIC_ENABLE	2414	# if EV_PERIODIC_ENABLE
1374	periodics_reschedule (EV_A);	2415	periodics_reschedule (EV_A);
1375	# endif	2416	# endif
1376	/* no timer adjustment, as the monotonic clock doesn't jump */
1377	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1378	}	2417	}
1379	else	2418	else
1380	#endif	2419	#endif
1381	{	2420	{
1382	ev_rt_now = ev_time ();	2421	ev_rt_now = ev_time ();
1383		2422
1384	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2423	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1385	{	2424	{
		2425	/* adjust timers. this is easy, as the offset is the same for all of them */
		2426	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1386	#if EV_PERIODIC_ENABLE	2427	#if EV_PERIODIC_ENABLE
1387	periodics_reschedule (EV_A);	2428	periodics_reschedule (EV_A);
1388	#endif	2429	#endif
1389	/* adjust timers. this is easy, as the offset is the same for all of them */
1390	for (i = 0; i < timercnt; ++i)
1391	((WT)timers [i])->at += ev_rt_now - mn_now;
1392	}	2430	}
1393		2431
1394	mn_now = ev_rt_now;	2432	mn_now = ev_rt_now;
1395	}	2433	}
1396	}	2434	}
1397		2435
1398	void	2436	void
1399	ev_ref (EV_P)
1400	{
1401	++activecnt;
1402	}
1403
1404	void
1405	ev_unref (EV_P)
1406	{
1407	--activecnt;
1408	}
1409
1410	static int loop_done;
1411
1412	void
1413	ev_loop (EV_P_ int flags)	2437	ev_run (EV_P_ int flags)
1414	{	2438	{
1415	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	2439	#if EV_FEATURE_API
1416	? EVUNLOOP_ONE	2440	++loop_depth;
1417	: EVUNLOOP_CANCEL;	2441	#endif
1418		2442
		2443	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
		2444
		2445	loop_done = EVBREAK_CANCEL;
		2446
1419	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2447	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1420		2448
1421	do	2449	do
1422	{	2450	{
		2451	#if EV_VERIFY >= 2
		2452	ev_verify (EV_A);
		2453	#endif
		2454
1423	#ifndef _WIN32	2455	#ifndef _WIN32
1424	if (expect_false (curpid)) /* penalise the forking check even more */	2456	if (expect_false (curpid)) /* penalise the forking check even more */
1425	if (expect_false (getpid () != curpid))	2457	if (expect_false (getpid () != curpid))
1426	{	2458	{
1427	curpid = getpid ();	2459	curpid = getpid ();
…		…
1433	/* we might have forked, so queue fork handlers */	2465	/* we might have forked, so queue fork handlers */
1434	if (expect_false (postfork))	2466	if (expect_false (postfork))
1435	if (forkcnt)	2467	if (forkcnt)
1436	{	2468	{
1437	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2469	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1438	call_pending (EV_A);	2470	EV_INVOKE_PENDING;
1439	}	2471	}
1440	#endif	2472	#endif
1441		2473
		2474	#if EV_PREPARE_ENABLE
1442	/* queue prepare watchers (and execute them) */	2475	/* queue prepare watchers (and execute them) */
1443	if (expect_false (preparecnt))	2476	if (expect_false (preparecnt))
1444	{	2477	{
1445	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2478	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1446	call_pending (EV_A);	2479	EV_INVOKE_PENDING;
1447	}	2480	}
		2481	#endif
1448		2482
1449	if (expect_false (!activecnt))	2483	if (expect_false (loop_done))
1450	break;	2484	break;
1451		2485
1452	/* we might have forked, so reify kernel state if necessary */	2486	/* we might have forked, so reify kernel state if necessary */
1453	if (expect_false (postfork))	2487	if (expect_false (postfork))
1454	loop_fork (EV_A);	2488	loop_fork (EV_A);
…		…
1456	/* update fd-related kernel structures */	2490	/* update fd-related kernel structures */
1457	fd_reify (EV_A);	2491	fd_reify (EV_A);
1458		2492
1459	/* calculate blocking time */	2493	/* calculate blocking time */
1460	{	2494	{
1461	ev_tstamp block;	2495	ev_tstamp waittime = 0.;
		2496	ev_tstamp sleeptime = 0.;
1462		2497
		2498	/* remember old timestamp for io_blocktime calculation */
		2499	ev_tstamp prev_mn_now = mn_now;
		2500
		2501	/* update time to cancel out callback processing overhead */
		2502	time_update (EV_A_ 1e100);
		2503
1463	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))	2504	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1464	block = 0.; /* do not block at all */
1465	else
1466	{	2505	{
1467	/* update time to cancel out callback processing overhead */
1468	time_update (EV_A_ 1e100);
1469
1470	block = MAX_BLOCKTIME;	2506	waittime = MAX_BLOCKTIME;
1471		2507
1472	if (timercnt)	2508	if (timercnt)
1473	{	2509	{
1474	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	2510	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_mintime;
1475	if (block > to) block = to;	2511	if (waittime > to) waittime = to;
1476	}	2512	}
1477		2513
1478	#if EV_PERIODIC_ENABLE	2514	#if EV_PERIODIC_ENABLE
1479	if (periodiccnt)	2515	if (periodiccnt)
1480	{	2516	{
1481	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	2517	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_mintime;
1482	if (block > to) block = to;	2518	if (waittime > to) waittime = to;
1483	}	2519	}
1484	#endif	2520	#endif
1485		2521
		2522	/* don't let timeouts decrease the waittime below timeout_blocktime */
		2523	if (expect_false (waittime < timeout_blocktime))
		2524	waittime = timeout_blocktime;
		2525
		2526	/* extra check because io_blocktime is commonly 0 */
1486	if (expect_false (block < 0.)) block = 0.;	2527	if (expect_false (io_blocktime))
		2528	{
		2529	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2530
		2531	if (sleeptime > waittime - backend_mintime)
		2532	sleeptime = waittime - backend_mintime;
		2533
		2534	if (expect_true (sleeptime > 0.))
		2535	{
		2536	ev_sleep (sleeptime);
		2537	waittime -= sleeptime;
		2538	}
		2539	}
1487	}	2540	}
1488		2541
		2542	#if EV_FEATURE_API
1489	++loop_count;	2543	++loop_count;
		2544	#endif
		2545	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1490	backend_poll (EV_A_ block);	2546	backend_poll (EV_A_ waittime);
		2547	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1491		2548
1492	/* update ev_rt_now, do magic */	2549	/* update ev_rt_now, do magic */
1493	time_update (EV_A_ block);	2550	time_update (EV_A_ waittime + sleeptime);
1494	}	2551	}
1495		2552
1496	/* queue pending timers and reschedule them */	2553	/* queue pending timers and reschedule them */
1497	timers_reify (EV_A); /* relative timers called last */	2554	timers_reify (EV_A); /* relative timers called last */
1498	#if EV_PERIODIC_ENABLE	2555	#if EV_PERIODIC_ENABLE
…		…
1502	#if EV_IDLE_ENABLE	2559	#if EV_IDLE_ENABLE
1503	/* queue idle watchers unless other events are pending */	2560	/* queue idle watchers unless other events are pending */
1504	idle_reify (EV_A);	2561	idle_reify (EV_A);
1505	#endif	2562	#endif
1506		2563
		2564	#if EV_CHECK_ENABLE
1507	/* queue check watchers, to be executed first */	2565	/* queue check watchers, to be executed first */
1508	if (expect_false (checkcnt))	2566	if (expect_false (checkcnt))
1509	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2567	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2568	#endif
1510		2569
1511	call_pending (EV_A);	2570	EV_INVOKE_PENDING;
1512
1513	}	2571	}
1514	while (expect_true (activecnt && !loop_done));	2572	while (expect_true (
		2573	activecnt
		2574	&& !loop_done
		2575	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
		2576	));
1515		2577
1516	if (loop_done == EVUNLOOP_ONE)	2578	if (loop_done == EVBREAK_ONE)
1517	loop_done = EVUNLOOP_CANCEL;	2579	loop_done = EVBREAK_CANCEL;
1518	}
1519		2580
		2581	#if EV_FEATURE_API
		2582	--loop_depth;
		2583	#endif
		2584	}
		2585
1520	void	2586	void
1521	ev_unloop (EV_P_ int how)	2587	ev_break (EV_P_ int how)
1522	{	2588	{
1523	loop_done = how;	2589	loop_done = how;
1524	}	2590	}
1525		2591
		2592	void
		2593	ev_ref (EV_P)
		2594	{
		2595	++activecnt;
		2596	}
		2597
		2598	void
		2599	ev_unref (EV_P)
		2600	{
		2601	--activecnt;
		2602	}
		2603
		2604	void
		2605	ev_now_update (EV_P)
		2606	{
		2607	time_update (EV_A_ 1e100);
		2608	}
		2609
		2610	void
		2611	ev_suspend (EV_P)
		2612	{
		2613	ev_now_update (EV_A);
		2614	}
		2615
		2616	void
		2617	ev_resume (EV_P)
		2618	{
		2619	ev_tstamp mn_prev = mn_now;
		2620
		2621	ev_now_update (EV_A);
		2622	timers_reschedule (EV_A_ mn_now - mn_prev);
		2623	#if EV_PERIODIC_ENABLE
		2624	/* TODO: really do this? */
		2625	periodics_reschedule (EV_A);
		2626	#endif
		2627	}
		2628
1526	/*****************************************************************************/	2629	/*****************************************************************************/
		2630	/* singly-linked list management, used when the expected list length is short */
1527		2631
1528	void inline_size	2632	inline_size void
1529	wlist_add (WL *head, WL elem)	2633	wlist_add (WL *head, WL elem)
1530	{	2634	{
1531	elem->next = *head;	2635	elem->next = *head;
1532	*head = elem;	2636	*head = elem;
1533	}	2637	}
1534		2638
1535	void inline_size	2639	inline_size void
1536	wlist_del (WL *head, WL elem)	2640	wlist_del (WL *head, WL elem)
1537	{	2641	{
1538	while (*head)	2642	while (*head)
1539	{	2643	{
1540	if (*head == elem)	2644	if (expect_true (*head == elem))
1541	{	2645	{
1542	*head = elem->next;	2646	*head = elem->next;
1543	return;	2647	break;
1544	}	2648	}
1545		2649
1546	head = &(*head)->next;	2650	head = &(*head)->next;
1547	}	2651	}
1548	}	2652	}
1549		2653
1550	void inline_speed	2654	/* internal, faster, version of ev_clear_pending */
		2655	inline_speed void
1551	clear_pending (EV_P_ W w)	2656	clear_pending (EV_P_ W w)
1552	{	2657	{
1553	if (w->pending)	2658	if (w->pending)
1554	{	2659	{
1555	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2660	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1556	w->pending = 0;	2661	w->pending = 0;
1557	}	2662	}
1558	}	2663	}
1559		2664
1560	int	2665	int
…		…
1564	int pending = w_->pending;	2669	int pending = w_->pending;
1565		2670
1566	if (expect_true (pending))	2671	if (expect_true (pending))
1567	{	2672	{
1568	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2673	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2674	p->w = (W)&pending_w;
1569	w_->pending = 0;	2675	w_->pending = 0;
1570	p->w = 0;
1571	return p->events;	2676	return p->events;
1572	}	2677	}
1573	else	2678	else
1574	return 0;	2679	return 0;
1575	}	2680	}
1576		2681
1577	void inline_size	2682	inline_size void
1578	pri_adjust (EV_P_ W w)	2683	pri_adjust (EV_P_ W w)
1579	{	2684	{
1580	int pri = w->priority;	2685	int pri = ev_priority (w);
1581	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2686	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1582	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2687	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1583	w->priority = pri;	2688	ev_set_priority (w, pri);
1584	}	2689	}
1585		2690
1586	void inline_speed	2691	inline_speed void
1587	ev_start (EV_P_ W w, int active)	2692	ev_start (EV_P_ W w, int active)
1588	{	2693	{
1589	pri_adjust (EV_A_ w);	2694	pri_adjust (EV_A_ w);
1590	w->active = active;	2695	w->active = active;
1591	ev_ref (EV_A);	2696	ev_ref (EV_A);
1592	}	2697	}
1593		2698
1594	void inline_size	2699	inline_size void
1595	ev_stop (EV_P_ W w)	2700	ev_stop (EV_P_ W w)
1596	{	2701	{
1597	ev_unref (EV_A);	2702	ev_unref (EV_A);
1598	w->active = 0;	2703	w->active = 0;
1599	}	2704	}
…		…
1606	int fd = w->fd;	2711	int fd = w->fd;
1607		2712
1608	if (expect_false (ev_is_active (w)))	2713	if (expect_false (ev_is_active (w)))
1609	return;	2714	return;
1610		2715
1611	assert (("ev_io_start called with negative fd", fd >= 0));	2716	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2717	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		2718
		2719	EV_FREQUENT_CHECK;
1612		2720
1613	ev_start (EV_A_ (W)w, 1);	2721	ev_start (EV_A_ (W)w, 1);
1614	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2722	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1615	wlist_add (&anfds[fd].head, (WL)w);	2723	wlist_add (&anfds[fd].head, (WL)w);
1616		2724
1617	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2725	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1618	w->events &= ~EV_IOFDSET;	2726	w->events &= ~EV__IOFDSET;
		2727
		2728	EV_FREQUENT_CHECK;
1619	}	2729	}
1620		2730
1621	void noinline	2731	void noinline
1622	ev_io_stop (EV_P_ ev_io *w)	2732	ev_io_stop (EV_P_ ev_io *w)
1623	{	2733	{
1624	clear_pending (EV_A_ (W)w);	2734	clear_pending (EV_A_ (W)w);
1625	if (expect_false (!ev_is_active (w)))	2735	if (expect_false (!ev_is_active (w)))
1626	return;	2736	return;
1627		2737
1628	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2738	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2739
		2740	EV_FREQUENT_CHECK;
1629		2741
1630	wlist_del (&anfds[w->fd].head, (WL)w);	2742	wlist_del (&anfds[w->fd].head, (WL)w);
1631	ev_stop (EV_A_ (W)w);	2743	ev_stop (EV_A_ (W)w);
1632		2744
1633	fd_change (EV_A_ w->fd, 1);	2745	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
		2746
		2747	EV_FREQUENT_CHECK;
1634	}	2748	}
1635		2749
1636	void noinline	2750	void noinline
1637	ev_timer_start (EV_P_ ev_timer *w)	2751	ev_timer_start (EV_P_ ev_timer *w)
1638	{	2752	{
1639	if (expect_false (ev_is_active (w)))	2753	if (expect_false (ev_is_active (w)))
1640	return;	2754	return;
1641		2755
1642	((WT)w)->at += mn_now;	2756	ev_at (w) += mn_now;
1643		2757
1644	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2758	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1645		2759
		2760	EV_FREQUENT_CHECK;
		2761
		2762	++timercnt;
1646	ev_start (EV_A_ (W)w, ++timercnt);	2763	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1647	array_needsize (WT, timers, timermax, timercnt, EMPTY2);	2764	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1648	timers [timercnt - 1] = (WT)w;	2765	ANHE_w (timers [ev_active (w)]) = (WT)w;
1649	upheap (timers, timercnt - 1);	2766	ANHE_at_cache (timers [ev_active (w)]);
		2767	upheap (timers, ev_active (w));
1650		2768
		2769	EV_FREQUENT_CHECK;
		2770
1651	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	2771	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1652	}	2772	}
1653		2773
1654	void noinline	2774	void noinline
1655	ev_timer_stop (EV_P_ ev_timer *w)	2775	ev_timer_stop (EV_P_ ev_timer *w)
1656	{	2776	{
1657	clear_pending (EV_A_ (W)w);	2777	clear_pending (EV_A_ (W)w);
1658	if (expect_false (!ev_is_active (w)))	2778	if (expect_false (!ev_is_active (w)))
1659	return;	2779	return;
1660		2780
1661	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));	2781	EV_FREQUENT_CHECK;
1662		2782
1663	{	2783	{
1664	int active = ((W)w)->active;	2784	int active = ev_active (w);
1665		2785
		2786	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2787
		2788	--timercnt;
		2789
1666	if (expect_true (--active < --timercnt))	2790	if (expect_true (active < timercnt + HEAP0))
1667	{	2791	{
1668	timers [active] = timers [timercnt];	2792	timers [active] = timers [timercnt + HEAP0];
1669	adjustheap (timers, timercnt, active);	2793	adjustheap (timers, timercnt, active);
1670	}	2794	}
1671	}	2795	}
1672		2796
1673	((WT)w)->at -= mn_now;	2797	ev_at (w) -= mn_now;
1674		2798
1675	ev_stop (EV_A_ (W)w);	2799	ev_stop (EV_A_ (W)w);
		2800
		2801	EV_FREQUENT_CHECK;
1676	}	2802	}
1677		2803
1678	void noinline	2804	void noinline
1679	ev_timer_again (EV_P_ ev_timer *w)	2805	ev_timer_again (EV_P_ ev_timer *w)
1680	{	2806	{
		2807	EV_FREQUENT_CHECK;
		2808
1681	if (ev_is_active (w))	2809	if (ev_is_active (w))
1682	{	2810	{
1683	if (w->repeat)	2811	if (w->repeat)
1684	{	2812	{
1685	((WT)w)->at = mn_now + w->repeat;	2813	ev_at (w) = mn_now + w->repeat;
		2814	ANHE_at_cache (timers [ev_active (w)]);
1686	adjustheap (timers, timercnt, ((W)w)->active - 1);	2815	adjustheap (timers, timercnt, ev_active (w));
1687	}	2816	}
1688	else	2817	else
1689	ev_timer_stop (EV_A_ w);	2818	ev_timer_stop (EV_A_ w);
1690	}	2819	}
1691	else if (w->repeat)	2820	else if (w->repeat)
1692	{	2821	{
1693	w->at = w->repeat;	2822	ev_at (w) = w->repeat;
1694	ev_timer_start (EV_A_ w);	2823	ev_timer_start (EV_A_ w);
1695	}	2824	}
		2825
		2826	EV_FREQUENT_CHECK;
		2827	}
		2828
		2829	ev_tstamp
		2830	ev_timer_remaining (EV_P_ ev_timer *w)
		2831	{
		2832	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1696	}	2833	}
1697		2834
1698	#if EV_PERIODIC_ENABLE	2835	#if EV_PERIODIC_ENABLE
1699	void noinline	2836	void noinline
1700	ev_periodic_start (EV_P_ ev_periodic *w)	2837	ev_periodic_start (EV_P_ ev_periodic *w)
1701	{	2838	{
1702	if (expect_false (ev_is_active (w)))	2839	if (expect_false (ev_is_active (w)))
1703	return;	2840	return;
1704		2841
1705	if (w->reschedule_cb)	2842	if (w->reschedule_cb)
1706	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2843	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1707	else if (w->interval)	2844	else if (w->interval)
1708	{	2845	{
1709	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2846	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1710	/* this formula differs from the one in periodic_reify because we do not always round up */	2847	periodic_recalc (EV_A_ w);
1711	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1712	}	2848	}
1713	else	2849	else
1714	((WT)w)->at = w->offset;	2850	ev_at (w) = w->offset;
1715		2851
		2852	EV_FREQUENT_CHECK;
		2853
		2854	++periodiccnt;
1716	ev_start (EV_A_ (W)w, ++periodiccnt);	2855	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1717	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);	2856	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1718	periodics [periodiccnt - 1] = (WT)w;	2857	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1719	upheap (periodics, periodiccnt - 1);	2858	ANHE_at_cache (periodics [ev_active (w)]);
		2859	upheap (periodics, ev_active (w));
1720		2860
		2861	EV_FREQUENT_CHECK;
		2862
1721	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2863	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1722	}	2864	}
1723		2865
1724	void noinline	2866	void noinline
1725	ev_periodic_stop (EV_P_ ev_periodic *w)	2867	ev_periodic_stop (EV_P_ ev_periodic *w)
1726	{	2868	{
1727	clear_pending (EV_A_ (W)w);	2869	clear_pending (EV_A_ (W)w);
1728	if (expect_false (!ev_is_active (w)))	2870	if (expect_false (!ev_is_active (w)))
1729	return;	2871	return;
1730		2872
1731	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));	2873	EV_FREQUENT_CHECK;
1732		2874
1733	{	2875	{
1734	int active = ((W)w)->active;	2876	int active = ev_active (w);
1735		2877
		2878	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2879
		2880	--periodiccnt;
		2881
1736	if (expect_true (--active < --periodiccnt))	2882	if (expect_true (active < periodiccnt + HEAP0))
1737	{	2883	{
1738	periodics [active] = periodics [periodiccnt];	2884	periodics [active] = periodics [periodiccnt + HEAP0];
1739	adjustheap (periodics, periodiccnt, active);	2885	adjustheap (periodics, periodiccnt, active);
1740	}	2886	}
1741	}	2887	}
1742		2888
1743	ev_stop (EV_A_ (W)w);	2889	ev_stop (EV_A_ (W)w);
		2890
		2891	EV_FREQUENT_CHECK;
1744	}	2892	}
1745		2893
1746	void noinline	2894	void noinline
1747	ev_periodic_again (EV_P_ ev_periodic *w)	2895	ev_periodic_again (EV_P_ ev_periodic *w)
1748	{	2896	{
…		…
1754		2902
1755	#ifndef SA_RESTART	2903	#ifndef SA_RESTART
1756	# define SA_RESTART 0	2904	# define SA_RESTART 0
1757	#endif	2905	#endif
1758		2906
		2907	#if EV_SIGNAL_ENABLE
		2908
1759	void noinline	2909	void noinline
1760	ev_signal_start (EV_P_ ev_signal *w)	2910	ev_signal_start (EV_P_ ev_signal *w)
1761	{	2911	{
1762	#if EV_MULTIPLICITY
1763	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1764	#endif
1765	if (expect_false (ev_is_active (w)))	2912	if (expect_false (ev_is_active (w)))
1766	return;	2913	return;
1767		2914
1768	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2915	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1769		2916
		2917	#if EV_MULTIPLICITY
		2918	assert (("libev: a signal must not be attached to two different loops",
		2919	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
		2920
		2921	signals [w->signum - 1].loop = EV_A;
		2922	#endif
		2923
		2924	EV_FREQUENT_CHECK;
		2925
		2926	#if EV_USE_SIGNALFD
		2927	if (sigfd == -2)
1770	{	2928	{
1771	#ifndef _WIN32	2929	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1772	sigset_t full, prev;	2930	if (sigfd < 0 && errno == EINVAL)
1773	sigfillset (&full);	2931	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1774	sigprocmask (SIG_SETMASK, &full, &prev);
1775	#endif
1776		2932
1777	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2933	if (sigfd >= 0)
		2934	{
		2935	fd_intern (sigfd); /* doing it twice will not hurt */
1778		2936
1779	#ifndef _WIN32	2937	sigemptyset (&sigfd_set);
1780	sigprocmask (SIG_SETMASK, &prev, 0);	2938
1781	#endif	2939	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2940	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2941	ev_io_start (EV_A_ &sigfd_w);
		2942	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2943	}
1782	}	2944	}
		2945
		2946	if (sigfd >= 0)
		2947	{
		2948	/* TODO: check .head */
		2949	sigaddset (&sigfd_set, w->signum);
		2950	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2951
		2952	signalfd (sigfd, &sigfd_set, 0);
		2953	}
		2954	#endif
1783		2955
1784	ev_start (EV_A_ (W)w, 1);	2956	ev_start (EV_A_ (W)w, 1);
1785	wlist_add (&signals [w->signum - 1].head, (WL)w);	2957	wlist_add (&signals [w->signum - 1].head, (WL)w);
1786		2958
1787	if (!((WL)w)->next)	2959	if (!((WL)w)->next)
		2960	# if EV_USE_SIGNALFD
		2961	if (sigfd < 0) /*TODO*/
		2962	# endif
1788	{	2963	{
1789	#if _WIN32	2964	# ifdef _WIN32
		2965	evpipe_init (EV_A);
		2966
1790	signal (w->signum, sighandler);	2967	signal (w->signum, ev_sighandler);
1791	#else	2968	# else
1792	struct sigaction sa;	2969	struct sigaction sa;
		2970
		2971	evpipe_init (EV_A);
		2972
1793	sa.sa_handler = sighandler;	2973	sa.sa_handler = ev_sighandler;
1794	sigfillset (&sa.sa_mask);	2974	sigfillset (&sa.sa_mask);
1795	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2975	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1796	sigaction (w->signum, &sa, 0);	2976	sigaction (w->signum, &sa, 0);
		2977
		2978	if (origflags & EVFLAG_NOSIGMASK)
		2979	{
		2980	sigemptyset (&sa.sa_mask);
		2981	sigaddset (&sa.sa_mask, w->signum);
		2982	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		2983	}
1797	#endif	2984	#endif
1798	}	2985	}
		2986
		2987	EV_FREQUENT_CHECK;
1799	}	2988	}
1800		2989
1801	void noinline	2990	void noinline
1802	ev_signal_stop (EV_P_ ev_signal *w)	2991	ev_signal_stop (EV_P_ ev_signal *w)
1803	{	2992	{
1804	clear_pending (EV_A_ (W)w);	2993	clear_pending (EV_A_ (W)w);
1805	if (expect_false (!ev_is_active (w)))	2994	if (expect_false (!ev_is_active (w)))
1806	return;	2995	return;
1807		2996
		2997	EV_FREQUENT_CHECK;
		2998
1808	wlist_del (&signals [w->signum - 1].head, (WL)w);	2999	wlist_del (&signals [w->signum - 1].head, (WL)w);
1809	ev_stop (EV_A_ (W)w);	3000	ev_stop (EV_A_ (W)w);
1810		3001
1811	if (!signals [w->signum - 1].head)	3002	if (!signals [w->signum - 1].head)
		3003	{
		3004	#if EV_MULTIPLICITY
		3005	signals [w->signum - 1].loop = 0; /* unattach from signal */
		3006	#endif
		3007	#if EV_USE_SIGNALFD
		3008	if (sigfd >= 0)
		3009	{
		3010	sigset_t ss;
		3011
		3012	sigemptyset (&ss);
		3013	sigaddset (&ss, w->signum);
		3014	sigdelset (&sigfd_set, w->signum);
		3015
		3016	signalfd (sigfd, &sigfd_set, 0);
		3017	sigprocmask (SIG_UNBLOCK, &ss, 0);
		3018	}
		3019	else
		3020	#endif
1812	signal (w->signum, SIG_DFL);	3021	signal (w->signum, SIG_DFL);
		3022	}
		3023
		3024	EV_FREQUENT_CHECK;
1813	}	3025	}
		3026
		3027	#endif
		3028
		3029	#if EV_CHILD_ENABLE
1814		3030
1815	void	3031	void
1816	ev_child_start (EV_P_ ev_child *w)	3032	ev_child_start (EV_P_ ev_child *w)
1817	{	3033	{
1818	#if EV_MULTIPLICITY	3034	#if EV_MULTIPLICITY
1819	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	3035	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1820	#endif	3036	#endif
1821	if (expect_false (ev_is_active (w)))	3037	if (expect_false (ev_is_active (w)))
1822	return;	3038	return;
1823		3039
		3040	EV_FREQUENT_CHECK;
		3041
1824	ev_start (EV_A_ (W)w, 1);	3042	ev_start (EV_A_ (W)w, 1);
1825	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	3043	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
		3044
		3045	EV_FREQUENT_CHECK;
1826	}	3046	}
1827		3047
1828	void	3048	void
1829	ev_child_stop (EV_P_ ev_child *w)	3049	ev_child_stop (EV_P_ ev_child *w)
1830	{	3050	{
1831	clear_pending (EV_A_ (W)w);	3051	clear_pending (EV_A_ (W)w);
1832	if (expect_false (!ev_is_active (w)))	3052	if (expect_false (!ev_is_active (w)))
1833	return;	3053	return;
1834		3054
		3055	EV_FREQUENT_CHECK;
		3056
1835	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	3057	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1836	ev_stop (EV_A_ (W)w);	3058	ev_stop (EV_A_ (W)w);
		3059
		3060	EV_FREQUENT_CHECK;
1837	}	3061	}
		3062
		3063	#endif
1838		3064
1839	#if EV_STAT_ENABLE	3065	#if EV_STAT_ENABLE
1840		3066
1841	# ifdef _WIN32	3067	# ifdef _WIN32
1842	# undef lstat	3068	# undef lstat
1843	# define lstat(a,b) _stati64 (a,b)	3069	# define lstat(a,b) _stati64 (a,b)
1844	# endif	3070	# endif
1845		3071
1846	#define DEF_STAT_INTERVAL 5.0074891	3072	#define DEF_STAT_INTERVAL 5.0074891
		3073	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1847	#define MIN_STAT_INTERVAL 0.1074891	3074	#define MIN_STAT_INTERVAL 0.1074891
1848		3075
1849	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	3076	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1850		3077
1851	#if EV_USE_INOTIFY	3078	#if EV_USE_INOTIFY
1852	# define EV_INOTIFY_BUFSIZE 8192	3079
		3080	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		3081	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1853		3082
1854	static void noinline	3083	static void noinline
1855	infy_add (EV_P_ ev_stat *w)	3084	infy_add (EV_P_ ev_stat *w)
1856	{	3085	{
1857	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);	3086	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);
1858		3087
1859	if (w->wd < 0)	3088	if (w->wd >= 0)
		3089	{
		3090	struct statfs sfs;
		3091
		3092	/* now local changes will be tracked by inotify, but remote changes won't */
		3093	/* unless the filesystem is known to be local, we therefore still poll */
		3094	/* also do poll on <2.6.25, but with normal frequency */
		3095
		3096	if (!fs_2625)
		3097	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3098	else if (!statfs (w->path, &sfs)
		3099	&& (sfs.f_type == 0x1373 /* devfs */
		3100	|| sfs.f_type == 0xEF53 /* ext2/3 */
		3101	|| sfs.f_type == 0x3153464a /* jfs */
		3102	|| sfs.f_type == 0x52654973 /* reiser3 */
		3103	|| sfs.f_type == 0x01021994 /* tempfs */
		3104	|| sfs.f_type == 0x58465342 /* xfs */))
		3105	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		3106	else
		3107	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1860	{	3108	}
1861	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	3109	else
		3110	{
		3111	/* can't use inotify, continue to stat */
		3112	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1862		3113
1863	/* monitor some parent directory for speedup hints */	3114	/* if path is not there, monitor some parent directory for speedup hints */
		3115	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		3116	/* but an efficiency issue only */
1864	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	3117	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1865	{	3118	{
1866	char path [4096];	3119	char path [4096];
1867	strcpy (path, w->path);	3120	strcpy (path, w->path);
1868		3121
…		…
1871	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	3124	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1872	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	3125	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1873		3126
1874	char *pend = strrchr (path, '/');	3127	char *pend = strrchr (path, '/');
1875		3128
1876	if (!pend)	3129	if (!pend || pend == path)
1877	break; /* whoops, no '/', complain to your admin */	3130	break;
1878		3131
1879	*pend = 0;	3132	*pend = 0;
1880	w->wd = inotify_add_watch (fs_fd, path, mask);	3133	w->wd = inotify_add_watch (fs_fd, path, mask);
1881	}	3134	}
1882	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3135	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1883	}	3136	}
1884	}	3137	}
1885	else
1886	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1887		3138
1888	if (w->wd >= 0)	3139	if (w->wd >= 0)
1889	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	3140	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3141
		3142	/* now re-arm timer, if required */
		3143	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3144	ev_timer_again (EV_A_ &w->timer);
		3145	if (ev_is_active (&w->timer)) ev_unref (EV_A);
1890	}	3146	}
1891		3147
1892	static void noinline	3148	static void noinline
1893	infy_del (EV_P_ ev_stat *w)	3149	infy_del (EV_P_ ev_stat *w)
1894	{	3150	{
…		…
1897		3153
1898	if (wd < 0)	3154	if (wd < 0)
1899	return;	3155	return;
1900		3156
1901	w->wd = -2;	3157	w->wd = -2;
1902	slot = wd & (EV_INOTIFY_HASHSIZE - 1);	3158	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1903	wlist_del (&fs_hash [slot].head, (WL)w);	3159	wlist_del (&fs_hash [slot].head, (WL)w);
1904		3160
1905	/* remove this watcher, if others are watching it, they will rearm */	3161	/* remove this watcher, if others are watching it, they will rearm */
1906	inotify_rm_watch (fs_fd, wd);	3162	inotify_rm_watch (fs_fd, wd);
1907	}	3163	}
1908		3164
1909	static void noinline	3165	static void noinline
1910	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	3166	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1911	{	3167	{
1912	if (slot < 0)	3168	if (slot < 0)
1913	/* overflow, need to check for all hahs slots */	3169	/* overflow, need to check for all hash slots */
1914	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3170	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1915	infy_wd (EV_A_ slot, wd, ev);	3171	infy_wd (EV_A_ slot, wd, ev);
1916	else	3172	else
1917	{	3173	{
1918	WL w_;	3174	WL w_;
1919		3175
1920	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )	3176	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
1921	{	3177	{
1922	ev_stat *w = (ev_stat *)w_;	3178	ev_stat *w = (ev_stat *)w_;
1923	w_ = w_->next; /* lets us remove this watcher and all before it */	3179	w_ = w_->next; /* lets us remove this watcher and all before it */
1924		3180
1925	if (w->wd == wd || wd == -1)	3181	if (w->wd == wd || wd == -1)
1926	{	3182	{
1927	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	3183	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1928	{	3184	{
		3185	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1929	w->wd = -1;	3186	w->wd = -1;
1930	infy_add (EV_A_ w); /* re-add, no matter what */	3187	infy_add (EV_A_ w); /* re-add, no matter what */
1931	}	3188	}
1932		3189
1933	stat_timer_cb (EV_A_ &w->timer, 0);	3190	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
1938		3195
1939	static void	3196	static void
1940	infy_cb (EV_P_ ev_io *w, int revents)	3197	infy_cb (EV_P_ ev_io *w, int revents)
1941	{	3198	{
1942	char buf [EV_INOTIFY_BUFSIZE];	3199	char buf [EV_INOTIFY_BUFSIZE];
1943	struct inotify_event *ev = (struct inotify_event *)buf;
1944	int ofs;	3200	int ofs;
1945	int len = read (fs_fd, buf, sizeof (buf));	3201	int len = read (fs_fd, buf, sizeof (buf));
1946		3202
1947	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3203	for (ofs = 0; ofs < len; )
		3204	{
		3205	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1948	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3206	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3207	ofs += sizeof (struct inotify_event) + ev->len;
		3208	}
1949	}	3209	}
1950		3210
1951	void inline_size	3211	inline_size void
		3212	ev_check_2625 (EV_P)
		3213	{
		3214	/* kernels < 2.6.25 are borked
		3215	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		3216	*/
		3217	if (ev_linux_version () < 0x020619)
		3218	return;
		3219
		3220	fs_2625 = 1;
		3221	}
		3222
		3223	inline_size int
		3224	infy_newfd (void)
		3225	{
		3226	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3227	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3228	if (fd >= 0)
		3229	return fd;
		3230	#endif
		3231	return inotify_init ();
		3232	}
		3233
		3234	inline_size void
1952	infy_init (EV_P)	3235	infy_init (EV_P)
1953	{	3236	{
1954	if (fs_fd != -2)	3237	if (fs_fd != -2)
1955	return;	3238	return;
1956		3239
		3240	fs_fd = -1;
		3241
		3242	ev_check_2625 (EV_A);
		3243
1957	fs_fd = inotify_init ();	3244	fs_fd = infy_newfd ();
1958		3245
1959	if (fs_fd >= 0)	3246	if (fs_fd >= 0)
1960	{	3247	{
		3248	fd_intern (fs_fd);
1961	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3249	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1962	ev_set_priority (&fs_w, EV_MAXPRI);	3250	ev_set_priority (&fs_w, EV_MAXPRI);
1963	ev_io_start (EV_A_ &fs_w);	3251	ev_io_start (EV_A_ &fs_w);
		3252	ev_unref (EV_A);
1964	}	3253	}
1965	}	3254	}
1966		3255
1967	void inline_size	3256	inline_size void
1968	infy_fork (EV_P)	3257	infy_fork (EV_P)
1969	{	3258	{
1970	int slot;	3259	int slot;
1971		3260
1972	if (fs_fd < 0)	3261	if (fs_fd < 0)
1973	return;	3262	return;
1974		3263
		3264	ev_ref (EV_A);
		3265	ev_io_stop (EV_A_ &fs_w);
1975	close (fs_fd);	3266	close (fs_fd);
1976	fs_fd = inotify_init ();	3267	fs_fd = infy_newfd ();
1977		3268
		3269	if (fs_fd >= 0)
		3270	{
		3271	fd_intern (fs_fd);
		3272	ev_io_set (&fs_w, fs_fd, EV_READ);
		3273	ev_io_start (EV_A_ &fs_w);
		3274	ev_unref (EV_A);
		3275	}
		3276
1978	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3277	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
1979	{	3278	{
1980	WL w_ = fs_hash [slot].head;	3279	WL w_ = fs_hash [slot].head;
1981	fs_hash [slot].head = 0;	3280	fs_hash [slot].head = 0;
1982		3281
1983	while (w_)	3282	while (w_)
…		…
1988	w->wd = -1;	3287	w->wd = -1;
1989		3288
1990	if (fs_fd >= 0)	3289	if (fs_fd >= 0)
1991	infy_add (EV_A_ w); /* re-add, no matter what */	3290	infy_add (EV_A_ w); /* re-add, no matter what */
1992	else	3291	else
		3292	{
		3293	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3294	if (ev_is_active (&w->timer)) ev_ref (EV_A);
1993	ev_timer_start (EV_A_ &w->timer);	3295	ev_timer_again (EV_A_ &w->timer);
		3296	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3297	}
1994	}	3298	}
1995
1996	}	3299	}
1997	}	3300	}
1998		3301
		3302	#endif
		3303
		3304	#ifdef _WIN32
		3305	# define EV_LSTAT(p,b) _stati64 (p, b)
		3306	#else
		3307	# define EV_LSTAT(p,b) lstat (p, b)
1999	#endif	3308	#endif
2000		3309
2001	void	3310	void
2002	ev_stat_stat (EV_P_ ev_stat *w)	3311	ev_stat_stat (EV_P_ ev_stat *w)
2003	{	3312	{
…		…
2010	static void noinline	3319	static void noinline
2011	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3320	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2012	{	3321	{
2013	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3322	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2014		3323
2015	/* we copy this here each the time so that */	3324	ev_statdata prev = w->attr;
2016	/* prev has the old value when the callback gets invoked */
2017	w->prev = w->attr;
2018	ev_stat_stat (EV_A_ w);	3325	ev_stat_stat (EV_A_ w);
2019		3326
2020	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3327	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2021	if (	3328	if (
2022	w->prev.st_dev != w->attr.st_dev	3329	prev.st_dev != w->attr.st_dev
2023	|| w->prev.st_ino != w->attr.st_ino	3330	|| prev.st_ino != w->attr.st_ino
2024	|| w->prev.st_mode != w->attr.st_mode	3331	|| prev.st_mode != w->attr.st_mode
2025	|| w->prev.st_nlink != w->attr.st_nlink	3332	|| prev.st_nlink != w->attr.st_nlink
2026	|| w->prev.st_uid != w->attr.st_uid	3333	|| prev.st_uid != w->attr.st_uid
2027	|| w->prev.st_gid != w->attr.st_gid	3334	|| prev.st_gid != w->attr.st_gid
2028	|| w->prev.st_rdev != w->attr.st_rdev	3335	|| prev.st_rdev != w->attr.st_rdev
2029	|| w->prev.st_size != w->attr.st_size	3336	|| prev.st_size != w->attr.st_size
2030	|| w->prev.st_atime != w->attr.st_atime	3337	|| prev.st_atime != w->attr.st_atime
2031	|| w->prev.st_mtime != w->attr.st_mtime	3338	|| prev.st_mtime != w->attr.st_mtime
2032	|| w->prev.st_ctime != w->attr.st_ctime	3339	|| prev.st_ctime != w->attr.st_ctime
2033	) {	3340	) {
		3341	/* we only update w->prev on actual differences */
		3342	/* in case we test more often than invoke the callback, */
		3343	/* to ensure that prev is always different to attr */
		3344	w->prev = prev;
		3345
2034	#if EV_USE_INOTIFY	3346	#if EV_USE_INOTIFY
		3347	if (fs_fd >= 0)
		3348	{
2035	infy_del (EV_A_ w);	3349	infy_del (EV_A_ w);
2036	infy_add (EV_A_ w);	3350	infy_add (EV_A_ w);
2037	ev_stat_stat (EV_A_ w); /* avoid race... */	3351	ev_stat_stat (EV_A_ w); /* avoid race... */
		3352	}
2038	#endif	3353	#endif
2039		3354
2040	ev_feed_event (EV_A_ w, EV_STAT);	3355	ev_feed_event (EV_A_ w, EV_STAT);
2041	}	3356	}
2042	}	3357	}
…		…
2045	ev_stat_start (EV_P_ ev_stat *w)	3360	ev_stat_start (EV_P_ ev_stat *w)
2046	{	3361	{
2047	if (expect_false (ev_is_active (w)))	3362	if (expect_false (ev_is_active (w)))
2048	return;	3363	return;
2049		3364
2050	/* since we use memcmp, we need to clear any padding data etc. */
2051	memset (&w->prev, 0, sizeof (ev_statdata));
2052	memset (&w->attr, 0, sizeof (ev_statdata));
2053
2054	ev_stat_stat (EV_A_ w);	3365	ev_stat_stat (EV_A_ w);
2055		3366
		3367	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2056	if (w->interval < MIN_STAT_INTERVAL)	3368	w->interval = MIN_STAT_INTERVAL;
2057	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2058		3369
2059	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	3370	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2060	ev_set_priority (&w->timer, ev_priority (w));	3371	ev_set_priority (&w->timer, ev_priority (w));
2061		3372
2062	#if EV_USE_INOTIFY	3373	#if EV_USE_INOTIFY
2063	infy_init (EV_A);	3374	infy_init (EV_A);
2064		3375
2065	if (fs_fd >= 0)	3376	if (fs_fd >= 0)
2066	infy_add (EV_A_ w);	3377	infy_add (EV_A_ w);
2067	else	3378	else
2068	#endif	3379	#endif
		3380	{
2069	ev_timer_start (EV_A_ &w->timer);	3381	ev_timer_again (EV_A_ &w->timer);
		3382	ev_unref (EV_A);
		3383	}
2070		3384
2071	ev_start (EV_A_ (W)w, 1);	3385	ev_start (EV_A_ (W)w, 1);
		3386
		3387	EV_FREQUENT_CHECK;
2072	}	3388	}
2073		3389
2074	void	3390	void
2075	ev_stat_stop (EV_P_ ev_stat *w)	3391	ev_stat_stop (EV_P_ ev_stat *w)
2076	{	3392	{
2077	clear_pending (EV_A_ (W)w);	3393	clear_pending (EV_A_ (W)w);
2078	if (expect_false (!ev_is_active (w)))	3394	if (expect_false (!ev_is_active (w)))
2079	return;	3395	return;
2080		3396
		3397	EV_FREQUENT_CHECK;
		3398
2081	#if EV_USE_INOTIFY	3399	#if EV_USE_INOTIFY
2082	infy_del (EV_A_ w);	3400	infy_del (EV_A_ w);
2083	#endif	3401	#endif
		3402
		3403	if (ev_is_active (&w->timer))
		3404	{
		3405	ev_ref (EV_A);
2084	ev_timer_stop (EV_A_ &w->timer);	3406	ev_timer_stop (EV_A_ &w->timer);
		3407	}
2085		3408
2086	ev_stop (EV_A_ (W)w);	3409	ev_stop (EV_A_ (W)w);
		3410
		3411	EV_FREQUENT_CHECK;
2087	}	3412	}
2088	#endif	3413	#endif
2089		3414
2090	#if EV_IDLE_ENABLE	3415	#if EV_IDLE_ENABLE
2091	void	3416	void
…		…
2093	{	3418	{
2094	if (expect_false (ev_is_active (w)))	3419	if (expect_false (ev_is_active (w)))
2095	return;	3420	return;
2096		3421
2097	pri_adjust (EV_A_ (W)w);	3422	pri_adjust (EV_A_ (W)w);
		3423
		3424	EV_FREQUENT_CHECK;
2098		3425
2099	{	3426	{
2100	int active = ++idlecnt [ABSPRI (w)];	3427	int active = ++idlecnt [ABSPRI (w)];
2101		3428
2102	++idleall;	3429	++idleall;
2103	ev_start (EV_A_ (W)w, active);	3430	ev_start (EV_A_ (W)w, active);
2104		3431
2105	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);	3432	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2106	idles [ABSPRI (w)][active - 1] = w;	3433	idles [ABSPRI (w)][active - 1] = w;
2107	}	3434	}
		3435
		3436	EV_FREQUENT_CHECK;
2108	}	3437	}
2109		3438
2110	void	3439	void
2111	ev_idle_stop (EV_P_ ev_idle *w)	3440	ev_idle_stop (EV_P_ ev_idle *w)
2112	{	3441	{
2113	clear_pending (EV_A_ (W)w);	3442	clear_pending (EV_A_ (W)w);
2114	if (expect_false (!ev_is_active (w)))	3443	if (expect_false (!ev_is_active (w)))
2115	return;	3444	return;
2116		3445
		3446	EV_FREQUENT_CHECK;
		3447
2117	{	3448	{
2118	int active = ((W)w)->active;	3449	int active = ev_active (w);
2119		3450
2120	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	3451	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2121	((W)idles [ABSPRI (w)][active - 1])->active = active;	3452	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2122		3453
2123	ev_stop (EV_A_ (W)w);	3454	ev_stop (EV_A_ (W)w);
2124	--idleall;	3455	--idleall;
2125	}	3456	}
2126	}
2127	#endif
2128		3457
		3458	EV_FREQUENT_CHECK;
		3459	}
		3460	#endif
		3461
		3462	#if EV_PREPARE_ENABLE
2129	void	3463	void
2130	ev_prepare_start (EV_P_ ev_prepare *w)	3464	ev_prepare_start (EV_P_ ev_prepare *w)
2131	{	3465	{
2132	if (expect_false (ev_is_active (w)))	3466	if (expect_false (ev_is_active (w)))
2133	return;	3467	return;
		3468
		3469	EV_FREQUENT_CHECK;
2134		3470
2135	ev_start (EV_A_ (W)w, ++preparecnt);	3471	ev_start (EV_A_ (W)w, ++preparecnt);
2136	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);	3472	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2137	prepares [preparecnt - 1] = w;	3473	prepares [preparecnt - 1] = w;
		3474
		3475	EV_FREQUENT_CHECK;
2138	}	3476	}
2139		3477
2140	void	3478	void
2141	ev_prepare_stop (EV_P_ ev_prepare *w)	3479	ev_prepare_stop (EV_P_ ev_prepare *w)
2142	{	3480	{
2143	clear_pending (EV_A_ (W)w);	3481	clear_pending (EV_A_ (W)w);
2144	if (expect_false (!ev_is_active (w)))	3482	if (expect_false (!ev_is_active (w)))
2145	return;	3483	return;
2146		3484
		3485	EV_FREQUENT_CHECK;
		3486
2147	{	3487	{
2148	int active = ((W)w)->active;	3488	int active = ev_active (w);
		3489
2149	prepares [active - 1] = prepares [--preparecnt];	3490	prepares [active - 1] = prepares [--preparecnt];
2150	((W)prepares [active - 1])->active = active;	3491	ev_active (prepares [active - 1]) = active;
2151	}	3492	}
2152		3493
2153	ev_stop (EV_A_ (W)w);	3494	ev_stop (EV_A_ (W)w);
2154	}
2155		3495
		3496	EV_FREQUENT_CHECK;
		3497	}
		3498	#endif
		3499
		3500	#if EV_CHECK_ENABLE
2156	void	3501	void
2157	ev_check_start (EV_P_ ev_check *w)	3502	ev_check_start (EV_P_ ev_check *w)
2158	{	3503	{
2159	if (expect_false (ev_is_active (w)))	3504	if (expect_false (ev_is_active (w)))
2160	return;	3505	return;
		3506
		3507	EV_FREQUENT_CHECK;
2161		3508
2162	ev_start (EV_A_ (W)w, ++checkcnt);	3509	ev_start (EV_A_ (W)w, ++checkcnt);
2163	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);	3510	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2164	checks [checkcnt - 1] = w;	3511	checks [checkcnt - 1] = w;
		3512
		3513	EV_FREQUENT_CHECK;
2165	}	3514	}
2166		3515
2167	void	3516	void
2168	ev_check_stop (EV_P_ ev_check *w)	3517	ev_check_stop (EV_P_ ev_check *w)
2169	{	3518	{
2170	clear_pending (EV_A_ (W)w);	3519	clear_pending (EV_A_ (W)w);
2171	if (expect_false (!ev_is_active (w)))	3520	if (expect_false (!ev_is_active (w)))
2172	return;	3521	return;
2173		3522
		3523	EV_FREQUENT_CHECK;
		3524
2174	{	3525	{
2175	int active = ((W)w)->active;	3526	int active = ev_active (w);
		3527
2176	checks [active - 1] = checks [--checkcnt];	3528	checks [active - 1] = checks [--checkcnt];
2177	((W)checks [active - 1])->active = active;	3529	ev_active (checks [active - 1]) = active;
2178	}	3530	}
2179		3531
2180	ev_stop (EV_A_ (W)w);	3532	ev_stop (EV_A_ (W)w);
		3533
		3534	EV_FREQUENT_CHECK;
2181	}	3535	}
		3536	#endif
2182		3537
2183	#if EV_EMBED_ENABLE	3538	#if EV_EMBED_ENABLE
2184	void noinline	3539	void noinline
2185	ev_embed_sweep (EV_P_ ev_embed *w)	3540	ev_embed_sweep (EV_P_ ev_embed *w)
2186	{	3541	{
2187	ev_loop (w->loop, EVLOOP_NONBLOCK);	3542	ev_run (w->other, EVRUN_NOWAIT);
2188	}	3543	}
2189		3544
2190	static void	3545	static void
2191	embed_cb (EV_P_ ev_io *io, int revents)	3546	embed_io_cb (EV_P_ ev_io *io, int revents)
2192	{	3547	{
2193	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3548	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2194		3549
2195	if (ev_cb (w))	3550	if (ev_cb (w))
2196	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3551	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2197	else	3552	else
2198	ev_embed_sweep (loop, w);	3553	ev_run (w->other, EVRUN_NOWAIT);
2199	}	3554	}
		3555
		3556	static void
		3557	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		3558	{
		3559	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		3560
		3561	{
		3562	EV_P = w->other;
		3563
		3564	while (fdchangecnt)
		3565	{
		3566	fd_reify (EV_A);
		3567	ev_run (EV_A_ EVRUN_NOWAIT);
		3568	}
		3569	}
		3570	}
		3571
		3572	static void
		3573	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3574	{
		3575	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3576
		3577	ev_embed_stop (EV_A_ w);
		3578
		3579	{
		3580	EV_P = w->other;
		3581
		3582	ev_loop_fork (EV_A);
		3583	ev_run (EV_A_ EVRUN_NOWAIT);
		3584	}
		3585
		3586	ev_embed_start (EV_A_ w);
		3587	}
		3588
		3589	#if 0
		3590	static void
		3591	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		3592	{
		3593	ev_idle_stop (EV_A_ idle);
		3594	}
		3595	#endif
2200		3596
2201	void	3597	void
2202	ev_embed_start (EV_P_ ev_embed *w)	3598	ev_embed_start (EV_P_ ev_embed *w)
2203	{	3599	{
2204	if (expect_false (ev_is_active (w)))	3600	if (expect_false (ev_is_active (w)))
2205	return;	3601	return;
2206		3602
2207	{	3603	{
2208	struct ev_loop *loop = w->loop;	3604	EV_P = w->other;
2209	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3605	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2210	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	3606	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2211	}	3607	}
		3608
		3609	EV_FREQUENT_CHECK;
2212		3610
2213	ev_set_priority (&w->io, ev_priority (w));	3611	ev_set_priority (&w->io, ev_priority (w));
2214	ev_io_start (EV_A_ &w->io);	3612	ev_io_start (EV_A_ &w->io);
2215		3613
		3614	ev_prepare_init (&w->prepare, embed_prepare_cb);
		3615	ev_set_priority (&w->prepare, EV_MINPRI);
		3616	ev_prepare_start (EV_A_ &w->prepare);
		3617
		3618	ev_fork_init (&w->fork, embed_fork_cb);
		3619	ev_fork_start (EV_A_ &w->fork);
		3620
		3621	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		3622
2216	ev_start (EV_A_ (W)w, 1);	3623	ev_start (EV_A_ (W)w, 1);
		3624
		3625	EV_FREQUENT_CHECK;
2217	}	3626	}
2218		3627
2219	void	3628	void
2220	ev_embed_stop (EV_P_ ev_embed *w)	3629	ev_embed_stop (EV_P_ ev_embed *w)
2221	{	3630	{
2222	clear_pending (EV_A_ (W)w);	3631	clear_pending (EV_A_ (W)w);
2223	if (expect_false (!ev_is_active (w)))	3632	if (expect_false (!ev_is_active (w)))
2224	return;	3633	return;
2225		3634
		3635	EV_FREQUENT_CHECK;
		3636
2226	ev_io_stop (EV_A_ &w->io);	3637	ev_io_stop (EV_A_ &w->io);
		3638	ev_prepare_stop (EV_A_ &w->prepare);
		3639	ev_fork_stop (EV_A_ &w->fork);
2227		3640
2228	ev_stop (EV_A_ (W)w);	3641	ev_stop (EV_A_ (W)w);
		3642
		3643	EV_FREQUENT_CHECK;
2229	}	3644	}
2230	#endif	3645	#endif
2231		3646
2232	#if EV_FORK_ENABLE	3647	#if EV_FORK_ENABLE
2233	void	3648	void
2234	ev_fork_start (EV_P_ ev_fork *w)	3649	ev_fork_start (EV_P_ ev_fork *w)
2235	{	3650	{
2236	if (expect_false (ev_is_active (w)))	3651	if (expect_false (ev_is_active (w)))
2237	return;	3652	return;
		3653
		3654	EV_FREQUENT_CHECK;
2238		3655
2239	ev_start (EV_A_ (W)w, ++forkcnt);	3656	ev_start (EV_A_ (W)w, ++forkcnt);
2240	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);	3657	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2241	forks [forkcnt - 1] = w;	3658	forks [forkcnt - 1] = w;
		3659
		3660	EV_FREQUENT_CHECK;
2242	}	3661	}
2243		3662
2244	void	3663	void
2245	ev_fork_stop (EV_P_ ev_fork *w)	3664	ev_fork_stop (EV_P_ ev_fork *w)
2246	{	3665	{
2247	clear_pending (EV_A_ (W)w);	3666	clear_pending (EV_A_ (W)w);
2248	if (expect_false (!ev_is_active (w)))	3667	if (expect_false (!ev_is_active (w)))
2249	return;	3668	return;
2250		3669
		3670	EV_FREQUENT_CHECK;
		3671
2251	{	3672	{
2252	int active = ((W)w)->active;	3673	int active = ev_active (w);
		3674
2253	forks [active - 1] = forks [--forkcnt];	3675	forks [active - 1] = forks [--forkcnt];
2254	((W)forks [active - 1])->active = active;	3676	ev_active (forks [active - 1]) = active;
2255	}	3677	}
2256		3678
2257	ev_stop (EV_A_ (W)w);	3679	ev_stop (EV_A_ (W)w);
		3680
		3681	EV_FREQUENT_CHECK;
		3682	}
		3683	#endif
		3684
		3685	#if EV_CLEANUP_ENABLE
		3686	void
		3687	ev_cleanup_start (EV_P_ ev_cleanup *w)
		3688	{
		3689	if (expect_false (ev_is_active (w)))
		3690	return;
		3691
		3692	EV_FREQUENT_CHECK;
		3693
		3694	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3695	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3696	cleanups [cleanupcnt - 1] = w;
		3697
		3698	/* cleanup watchers should never keep a refcount on the loop */
		3699	ev_unref (EV_A);
		3700	EV_FREQUENT_CHECK;
		3701	}
		3702
		3703	void
		3704	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3705	{
		3706	clear_pending (EV_A_ (W)w);
		3707	if (expect_false (!ev_is_active (w)))
		3708	return;
		3709
		3710	EV_FREQUENT_CHECK;
		3711	ev_ref (EV_A);
		3712
		3713	{
		3714	int active = ev_active (w);
		3715
		3716	cleanups [active - 1] = cleanups [--cleanupcnt];
		3717	ev_active (cleanups [active - 1]) = active;
		3718	}
		3719
		3720	ev_stop (EV_A_ (W)w);
		3721
		3722	EV_FREQUENT_CHECK;
		3723	}
		3724	#endif
		3725
		3726	#if EV_ASYNC_ENABLE
		3727	void
		3728	ev_async_start (EV_P_ ev_async *w)
		3729	{
		3730	if (expect_false (ev_is_active (w)))
		3731	return;
		3732
		3733	w->sent = 0;
		3734
		3735	evpipe_init (EV_A);
		3736
		3737	EV_FREQUENT_CHECK;
		3738
		3739	ev_start (EV_A_ (W)w, ++asynccnt);
		3740	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		3741	asyncs [asynccnt - 1] = w;
		3742
		3743	EV_FREQUENT_CHECK;
		3744	}
		3745
		3746	void
		3747	ev_async_stop (EV_P_ ev_async *w)
		3748	{
		3749	clear_pending (EV_A_ (W)w);
		3750	if (expect_false (!ev_is_active (w)))
		3751	return;
		3752
		3753	EV_FREQUENT_CHECK;
		3754
		3755	{
		3756	int active = ev_active (w);
		3757
		3758	asyncs [active - 1] = asyncs [--asynccnt];
		3759	ev_active (asyncs [active - 1]) = active;
		3760	}
		3761
		3762	ev_stop (EV_A_ (W)w);
		3763
		3764	EV_FREQUENT_CHECK;
		3765	}
		3766
		3767	void
		3768	ev_async_send (EV_P_ ev_async *w)
		3769	{
		3770	w->sent = 1;
		3771	evpipe_write (EV_A_ &async_pending);
2258	}	3772	}
2259	#endif	3773	#endif
2260		3774
2261	/*****************************************************************************/	3775	/*****************************************************************************/
2262		3776
…		…
2272	once_cb (EV_P_ struct ev_once *once, int revents)	3786	once_cb (EV_P_ struct ev_once *once, int revents)
2273	{	3787	{
2274	void (*cb)(int revents, void *arg) = once->cb;	3788	void (*cb)(int revents, void *arg) = once->cb;
2275	void *arg = once->arg;	3789	void *arg = once->arg;
2276		3790
2277	ev_io_stop (EV_A_ &once->io);	3791	ev_io_stop (EV_A_ &once->io);
2278	ev_timer_stop (EV_A_ &once->to);	3792	ev_timer_stop (EV_A_ &once->to);
2279	ev_free (once);	3793	ev_free (once);
2280		3794
2281	cb (revents, arg);	3795	cb (revents, arg);
2282	}	3796	}
2283		3797
2284	static void	3798	static void
2285	once_cb_io (EV_P_ ev_io *w, int revents)	3799	once_cb_io (EV_P_ ev_io *w, int revents)
2286	{	3800	{
2287	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3801	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3802
		3803	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2288	}	3804	}
2289		3805
2290	static void	3806	static void
2291	once_cb_to (EV_P_ ev_timer *w, int revents)	3807	once_cb_to (EV_P_ ev_timer *w, int revents)
2292	{	3808	{
2293	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3809	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3810
		3811	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2294	}	3812	}
2295		3813
2296	void	3814	void
2297	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3815	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2298	{	3816	{
2299	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3817	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2300		3818
2301	if (expect_false (!once))	3819	if (expect_false (!once))
2302	{	3820	{
2303	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3821	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2304	return;	3822	return;
2305	}	3823	}
2306		3824
2307	once->cb = cb;	3825	once->cb = cb;
2308	once->arg = arg;	3826	once->arg = arg;
…		…
2320	ev_timer_set (&once->to, timeout, 0.);	3838	ev_timer_set (&once->to, timeout, 0.);
2321	ev_timer_start (EV_A_ &once->to);	3839	ev_timer_start (EV_A_ &once->to);
2322	}	3840	}
2323	}	3841	}
2324		3842
2325	#ifdef __cplusplus	3843	/*****************************************************************************/
2326	}	3844
		3845	#if EV_WALK_ENABLE
		3846	void
		3847	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3848	{
		3849	int i, j;
		3850	ev_watcher_list *wl, *wn;
		3851
		3852	if (types & (EV_IO | EV_EMBED))
		3853	for (i = 0; i < anfdmax; ++i)
		3854	for (wl = anfds [i].head; wl; )
		3855	{
		3856	wn = wl->next;
		3857
		3858	#if EV_EMBED_ENABLE
		3859	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3860	{
		3861	if (types & EV_EMBED)
		3862	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3863	}
		3864	else
		3865	#endif
		3866	#if EV_USE_INOTIFY
		3867	if (ev_cb ((ev_io *)wl) == infy_cb)
		3868	;
		3869	else
		3870	#endif
		3871	if ((ev_io *)wl != &pipe_w)
		3872	if (types & EV_IO)
		3873	cb (EV_A_ EV_IO, wl);
		3874
		3875	wl = wn;
		3876	}
		3877
		3878	if (types & (EV_TIMER | EV_STAT))
		3879	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3880	#if EV_STAT_ENABLE
		3881	/*TODO: timer is not always active*/
		3882	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3883	{
		3884	if (types & EV_STAT)
		3885	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3886	}
		3887	else
		3888	#endif
		3889	if (types & EV_TIMER)
		3890	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3891
		3892	#if EV_PERIODIC_ENABLE
		3893	if (types & EV_PERIODIC)
		3894	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3895	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3896	#endif
		3897
		3898	#if EV_IDLE_ENABLE
		3899	if (types & EV_IDLE)
		3900	for (j = NUMPRI; i--; )
		3901	for (i = idlecnt [j]; i--; )
		3902	cb (EV_A_ EV_IDLE, idles [j][i]);
		3903	#endif
		3904
		3905	#if EV_FORK_ENABLE
		3906	if (types & EV_FORK)
		3907	for (i = forkcnt; i--; )
		3908	if (ev_cb (forks [i]) != embed_fork_cb)
		3909	cb (EV_A_ EV_FORK, forks [i]);
		3910	#endif
		3911
		3912	#if EV_ASYNC_ENABLE
		3913	if (types & EV_ASYNC)
		3914	for (i = asynccnt; i--; )
		3915	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3916	#endif
		3917
		3918	#if EV_PREPARE_ENABLE
		3919	if (types & EV_PREPARE)
		3920	for (i = preparecnt; i--; )
		3921	# if EV_EMBED_ENABLE
		3922	if (ev_cb (prepares [i]) != embed_prepare_cb)
2327	#endif	3923	# endif
		3924	cb (EV_A_ EV_PREPARE, prepares [i]);
		3925	#endif
2328		3926
		3927	#if EV_CHECK_ENABLE
		3928	if (types & EV_CHECK)
		3929	for (i = checkcnt; i--; )
		3930	cb (EV_A_ EV_CHECK, checks [i]);
		3931	#endif
		3932
		3933	#if EV_SIGNAL_ENABLE
		3934	if (types & EV_SIGNAL)
		3935	for (i = 0; i < EV_NSIG - 1; ++i)
		3936	for (wl = signals [i].head; wl; )
		3937	{
		3938	wn = wl->next;
		3939	cb (EV_A_ EV_SIGNAL, wl);
		3940	wl = wn;
		3941	}
		3942	#endif
		3943
		3944	#if EV_CHILD_ENABLE
		3945	if (types & EV_CHILD)
		3946	for (i = (EV_PID_HASHSIZE); i--; )
		3947	for (wl = childs [i]; wl; )
		3948	{
		3949	wn = wl->next;
		3950	cb (EV_A_ EV_CHILD, wl);
		3951	wl = wn;
		3952	}
		3953	#endif
		3954	/* EV_STAT 0x00001000 /* stat data changed */
		3955	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3956	}
		3957	#endif
		3958
		3959	#if EV_MULTIPLICITY
		3960	#include "ev_wrap.h"
		3961	#endif
		3962
		3963	EV_CPP(})
		3964

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines