ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.219 by root, Wed Apr 2 10:55:39 2008 UTC vs.
Revision 1.491 by root, Thu Jun 20 23:14:53 2019 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
10	* 1. Redistributions of source code must retain the above copyright notice,	10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.	11	* this list of conditions and the following disclaimer.
12	*	12	*
13	* 2. Redistributions in binary form must reproduce the above copyright	13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the	14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.	15	* documentation and/or other materials provided with the distribution.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO	19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-	20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,	21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
…		…
35	* and other provisions required by the GPL. If you do not delete the	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	36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.	37	* either the BSD or the GPL.
38	*/	38	*/
39		39
40	#ifdef __cplusplus	40	/* this big block deduces configuration from config.h */
41	extern "C" {
42	#endif
43
44	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
45	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
46	# include EV_CONFIG_H	43	# include EV_CONFIG_H
47	# else	44	# else
48	# include "config.h"	45	# include "config.h"
49	# endif	46	# endif
50		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
51	# if HAVE_CLOCK_GETTIME	68	# if HAVE_CLOCK_GETTIME
52	# ifndef EV_USE_MONOTONIC	69	# ifndef EV_USE_MONOTONIC
53	# define EV_USE_MONOTONIC 1	70	# define EV_USE_MONOTONIC 1
54	# endif	71	# endif
55	# ifndef EV_USE_REALTIME	72	# ifndef EV_USE_REALTIME
56	# define EV_USE_REALTIME 1	73	# define EV_USE_REALTIME 0
57	# endif	74	# endif
58	# else	75	# else
59	# ifndef EV_USE_MONOTONIC	76	# ifndef EV_USE_MONOTONIC
60	# define EV_USE_MONOTONIC 0	77	# define EV_USE_MONOTONIC 0
61	# endif	78	# endif
62	# ifndef EV_USE_REALTIME	79	# ifndef EV_USE_REALTIME
63	# define EV_USE_REALTIME 0	80	# define EV_USE_REALTIME 0
64	# endif	81	# endif
65	# endif	82	# endif
66		83
		84	# if HAVE_NANOSLEEP
67	# ifndef EV_USE_NANOSLEEP	85	# ifndef EV_USE_NANOSLEEP
68	# if HAVE_NANOSLEEP
69	# define EV_USE_NANOSLEEP 1	86	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		87	# endif
70	# else	88	# else
		89	# undef EV_USE_NANOSLEEP
71	# define EV_USE_NANOSLEEP 0	90	# define EV_USE_NANOSLEEP 0
		91	# endif
		92
		93	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		94	# ifndef EV_USE_SELECT
		95	# define EV_USE_SELECT EV_FEATURE_BACKENDS
72	# endif	96	# endif
		97	# else
		98	# undef EV_USE_SELECT
		99	# define EV_USE_SELECT 0
73	# endif	100	# endif
74		101
		102	# if HAVE_POLL && HAVE_POLL_H
75	# ifndef EV_USE_SELECT	103	# ifndef EV_USE_POLL
76	# if HAVE_SELECT && HAVE_SYS_SELECT_H	104	# define EV_USE_POLL EV_FEATURE_BACKENDS
77	# define EV_USE_SELECT 1
78	# else
79	# define EV_USE_SELECT 0
80	# endif	105	# endif
81	# endif
82
83	# ifndef EV_USE_POLL
84	# if HAVE_POLL && HAVE_POLL_H
85	# define EV_USE_POLL 1
86	# else	106	# else
		107	# undef EV_USE_POLL
87	# define EV_USE_POLL 0	108	# define EV_USE_POLL 0
88	# endif
89	# endif	109	# endif
90		110
91	# ifndef EV_USE_EPOLL
92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	111	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93	# define EV_USE_EPOLL 1	112	# ifndef EV_USE_EPOLL
94	# else	113	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
95	# define EV_USE_EPOLL 0
96	# endif	114	# endif
		115	# else
		116	# undef EV_USE_EPOLL
		117	# define EV_USE_EPOLL 0
97	# endif	118	# endif
98		119
99	# ifndef EV_USE_KQUEUE	120	# if HAVE_LINUX_AIO_ABI_H
100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	121	# ifndef EV_USE_LINUXAIO
101	# define EV_USE_KQUEUE 1	122	# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
102	# else
103	# define EV_USE_KQUEUE 0
104	# endif	123	# endif
		124	# else
		125	# undef EV_USE_LINUXAIO
		126	# define EV_USE_LINUXAIO 0
105	# endif	127	# endif
106		128
107	# ifndef EV_USE_PORT	129	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
108	# if HAVE_PORT_H && HAVE_PORT_CREATE	130	# ifndef EV_USE_KQUEUE
109	# define EV_USE_PORT 1	131	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
110	# else
111	# define EV_USE_PORT 0
112	# endif	132	# endif
		133	# else
		134	# undef EV_USE_KQUEUE
		135	# define EV_USE_KQUEUE 0
113	# endif	136	# endif
114		137
		138	# if HAVE_PORT_H && HAVE_PORT_CREATE
115	# ifndef EV_USE_INOTIFY	139	# ifndef EV_USE_PORT
116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H	140	# define EV_USE_PORT EV_FEATURE_BACKENDS
117	# define EV_USE_INOTIFY 1
118	# else
119	# define EV_USE_INOTIFY 0
120	# endif	141	# endif
		142	# else
		143	# undef EV_USE_PORT
		144	# define EV_USE_PORT 0
121	# endif	145	# endif
122		146
		147	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		148	# ifndef EV_USE_INOTIFY
		149	# define EV_USE_INOTIFY EV_FEATURE_OS
		150	# endif
		151	# else
		152	# undef EV_USE_INOTIFY
		153	# define EV_USE_INOTIFY 0
123	#endif	154	# endif
124		155
125	#include <math.h>	156	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		157	# ifndef EV_USE_SIGNALFD
		158	# define EV_USE_SIGNALFD EV_FEATURE_OS
		159	# endif
		160	# else
		161	# undef EV_USE_SIGNALFD
		162	# define EV_USE_SIGNALFD 0
		163	# endif
		164
		165	# if HAVE_EVENTFD
		166	# ifndef EV_USE_EVENTFD
		167	# define EV_USE_EVENTFD EV_FEATURE_OS
		168	# endif
		169	# else
		170	# undef EV_USE_EVENTFD
		171	# define EV_USE_EVENTFD 0
		172	# endif
		173
		174	#endif
		175
		176	/* OS X, in its infinite idiocy, actually HARDCODES
		177	* a limit of 1024 into their select. Where people have brains,
		178	* OS X engineers apparently have a vacuum. Or maybe they were
		179	* ordered to have a vacuum, or they do anything for money.
		180	* This might help. Or not.
		181	* Note that this must be defined early, as other include files
		182	* will rely on this define as well.
		183	*/
		184	#define _DARWIN_UNLIMITED_SELECT 1
		185
126	#include <stdlib.h>	186	#include <stdlib.h>
		187	#include <string.h>
127	#include <fcntl.h>	188	#include <fcntl.h>
128	#include <stddef.h>	189	#include <stddef.h>
129		190
130	#include <stdio.h>	191	#include <stdio.h>
131		192
132	#include <assert.h>	193	#include <assert.h>
133	#include <errno.h>	194	#include <errno.h>
134	#include <sys/types.h>	195	#include <sys/types.h>
135	#include <time.h>	196	#include <time.h>
		197	#include <limits.h>
136		198
137	#include <signal.h>	199	#include <signal.h>
138		200
139	#ifdef EV_H	201	#ifdef EV_H
140	# include EV_H	202	# include EV_H
141	#else	203	#else
142	# include "ev.h"	204	# include "ev.h"
		205	#endif
		206
		207	#if EV_NO_THREADS
		208	# undef EV_NO_SMP
		209	# define EV_NO_SMP 1
		210	# undef ECB_NO_THREADS
		211	# define ECB_NO_THREADS 1
		212	#endif
		213	#if EV_NO_SMP
		214	# undef EV_NO_SMP
		215	# define ECB_NO_SMP 1
143	#endif	216	#endif
144		217
145	#ifndef _WIN32	218	#ifndef _WIN32
146	# include <sys/time.h>	219	# include <sys/time.h>
147	# include <sys/wait.h>	220	# include <sys/wait.h>
148	# include <unistd.h>	221	# include <unistd.h>
149	#else	222	#else
		223	# include <io.h>
150	# define WIN32_LEAN_AND_MEAN	224	# define WIN32_LEAN_AND_MEAN
		225	# include <winsock2.h>
151	# include <windows.h>	226	# include <windows.h>
152	# ifndef EV_SELECT_IS_WINSOCKET	227	# ifndef EV_SELECT_IS_WINSOCKET
153	# define EV_SELECT_IS_WINSOCKET 1	228	# define EV_SELECT_IS_WINSOCKET 1
154	# endif	229	# endif
		230	# undef EV_AVOID_STDIO
		231	#endif
		232
		233	/* this block tries to deduce configuration from header-defined symbols and defaults */
		234
		235	/* try to deduce the maximum number of signals on this platform */
		236	#if defined EV_NSIG
		237	/* use what's provided */
		238	#elif defined NSIG
		239	# define EV_NSIG (NSIG)
		240	#elif defined _NSIG
		241	# define EV_NSIG (_NSIG)
		242	#elif defined SIGMAX
		243	# define EV_NSIG (SIGMAX+1)
		244	#elif defined SIG_MAX
		245	# define EV_NSIG (SIG_MAX+1)
		246	#elif defined _SIG_MAX
		247	# define EV_NSIG (_SIG_MAX+1)
		248	#elif defined MAXSIG
		249	# define EV_NSIG (MAXSIG+1)
		250	#elif defined MAX_SIG
		251	# define EV_NSIG (MAX_SIG+1)
		252	#elif defined SIGARRAYSIZE
		253	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		254	#elif defined _sys_nsig
		255	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		256	#else
		257	# define EV_NSIG (8 * sizeof (sigset_t) + 1)
		258	#endif
		259
		260	#ifndef EV_USE_FLOOR
		261	# define EV_USE_FLOOR 0
		262	#endif
		263
		264	#ifndef EV_USE_CLOCK_SYSCALL
		265	# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
		266	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
		267	# else
		268	# define EV_USE_CLOCK_SYSCALL 0
155	#endif	269	# endif
		270	#endif
156		271
157	/**/	272	#if !(_POSIX_TIMERS > 0)
		273	# ifndef EV_USE_MONOTONIC
		274	# define EV_USE_MONOTONIC 0
		275	# endif
		276	# ifndef EV_USE_REALTIME
		277	# define EV_USE_REALTIME 0
		278	# endif
		279	#endif
158		280
159	#ifndef EV_USE_MONOTONIC	281	#ifndef EV_USE_MONOTONIC
		282	# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
		283	# define EV_USE_MONOTONIC EV_FEATURE_OS
		284	# else
160	# define EV_USE_MONOTONIC 0	285	# define EV_USE_MONOTONIC 0
		286	# endif
161	#endif	287	#endif
162		288
163	#ifndef EV_USE_REALTIME	289	#ifndef EV_USE_REALTIME
164	# define EV_USE_REALTIME 0	290	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
165	#endif	291	#endif
166		292
167	#ifndef EV_USE_NANOSLEEP	293	#ifndef EV_USE_NANOSLEEP
		294	# if _POSIX_C_SOURCE >= 199309L
		295	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		296	# else
168	# define EV_USE_NANOSLEEP 0	297	# define EV_USE_NANOSLEEP 0
		298	# endif
169	#endif	299	#endif
170		300
171	#ifndef EV_USE_SELECT	301	#ifndef EV_USE_SELECT
172	# define EV_USE_SELECT 1	302	# define EV_USE_SELECT EV_FEATURE_BACKENDS
173	#endif	303	#endif
174		304
175	#ifndef EV_USE_POLL	305	#ifndef EV_USE_POLL
176	# ifdef _WIN32	306	# ifdef _WIN32
177	# define EV_USE_POLL 0	307	# define EV_USE_POLL 0
178	# else	308	# else
179	# define EV_USE_POLL 1	309	# define EV_USE_POLL EV_FEATURE_BACKENDS
180	# endif	310	# endif
181	#endif	311	#endif
182		312
183	#ifndef EV_USE_EPOLL	313	#ifndef EV_USE_EPOLL
		314	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		315	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		316	# else
184	# define EV_USE_EPOLL 0	317	# define EV_USE_EPOLL 0
		318	# endif
185	#endif	319	#endif
186		320
187	#ifndef EV_USE_KQUEUE	321	#ifndef EV_USE_KQUEUE
188	# define EV_USE_KQUEUE 0	322	# define EV_USE_KQUEUE 0
189	#endif	323	#endif
190		324
191	#ifndef EV_USE_PORT	325	#ifndef EV_USE_PORT
192	# define EV_USE_PORT 0	326	# define EV_USE_PORT 0
193	#endif	327	#endif
194		328
		329	#ifndef EV_USE_LINUXAIO
		330	# define EV_USE_LINUXAIO 0
		331	#endif
		332
195	#ifndef EV_USE_INOTIFY	333	#ifndef EV_USE_INOTIFY
		334	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		335	# define EV_USE_INOTIFY EV_FEATURE_OS
		336	# else
196	# define EV_USE_INOTIFY 0	337	# define EV_USE_INOTIFY 0
		338	# endif
197	#endif	339	#endif
198		340
199	#ifndef EV_PID_HASHSIZE	341	#ifndef EV_PID_HASHSIZE
200	# if EV_MINIMAL	342	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
201	# define EV_PID_HASHSIZE 1	343	#endif
		344
		345	#ifndef EV_INOTIFY_HASHSIZE
		346	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		347	#endif
		348
		349	#ifndef EV_USE_EVENTFD
		350	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		351	# define EV_USE_EVENTFD EV_FEATURE_OS
202	# else	352	# else
203	# define EV_PID_HASHSIZE 16	353	# define EV_USE_EVENTFD 0
204	# endif	354	# endif
205	#endif	355	#endif
206		356
207	#ifndef EV_INOTIFY_HASHSIZE	357	#ifndef EV_USE_SIGNALFD
208	# if EV_MINIMAL	358	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
209	# define EV_INOTIFY_HASHSIZE 1	359	# define EV_USE_SIGNALFD EV_FEATURE_OS
210	# else	360	# else
211	# define EV_INOTIFY_HASHSIZE 16	361	# define EV_USE_SIGNALFD 0
212	# endif	362	# endif
213	#endif	363	#endif
214		364
215	/**/	365	#if 0 /* debugging */
		366	# define EV_VERIFY 3
		367	# define EV_USE_4HEAP 1
		368	# define EV_HEAP_CACHE_AT 1
		369	#endif
		370
		371	#ifndef EV_VERIFY
		372	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
		373	#endif
		374
		375	#ifndef EV_USE_4HEAP
		376	# define EV_USE_4HEAP EV_FEATURE_DATA
		377	#endif
		378
		379	#ifndef EV_HEAP_CACHE_AT
		380	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
		381	#endif
		382
		383	#ifdef __ANDROID__
		384	/* supposedly, android doesn't typedef fd_mask */
		385	# undef EV_USE_SELECT
		386	# define EV_USE_SELECT 0
		387	/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
		388	# undef EV_USE_CLOCK_SYSCALL
		389	# define EV_USE_CLOCK_SYSCALL 0
		390	#endif
		391
		392	/* aix's poll.h seems to cause lots of trouble */
		393	#ifdef _AIX
		394	/* AIX has a completely broken poll.h header */
		395	# undef EV_USE_POLL
		396	# define EV_USE_POLL 0
		397	#endif
		398
		399	#if EV_USE_LINUXAIO
		400	# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
		401	#endif
		402
		403	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		404	/* which makes programs even slower. might work on other unices, too. */
		405	#if EV_USE_CLOCK_SYSCALL
		406	# include <sys/syscall.h>
		407	# ifdef SYS_clock_gettime
		408	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		409	# undef EV_USE_MONOTONIC
		410	# define EV_USE_MONOTONIC 1
		411	# else
		412	# undef EV_USE_CLOCK_SYSCALL
		413	# define EV_USE_CLOCK_SYSCALL 0
		414	# endif
		415	#endif
		416
		417	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
216		418
217	#ifndef CLOCK_MONOTONIC	419	#ifndef CLOCK_MONOTONIC
218	# undef EV_USE_MONOTONIC	420	# undef EV_USE_MONOTONIC
219	# define EV_USE_MONOTONIC 0	421	# define EV_USE_MONOTONIC 0
220	#endif	422	#endif
…		…
228	# undef EV_USE_INOTIFY	430	# undef EV_USE_INOTIFY
229	# define EV_USE_INOTIFY 0	431	# define EV_USE_INOTIFY 0
230	#endif	432	#endif
231		433
232	#if !EV_USE_NANOSLEEP	434	#if !EV_USE_NANOSLEEP
233	# ifndef _WIN32	435	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		436	# if !defined _WIN32 && !defined __hpux
234	# include <sys/select.h>	437	# include <sys/select.h>
235	# endif	438	# endif
236	#endif	439	#endif
237		440
		441	#if EV_USE_LINUXAIO
		442	# include <sys/syscall.h>
		443	# if !SYS_io_getevents
		444	# undef EV_USE_LINUXAIO
		445	# define EV_USE_LINUXAIO 0
		446	# endif
		447	#endif
		448
238	#if EV_USE_INOTIFY	449	#if EV_USE_INOTIFY
		450	# include <sys/statfs.h>
239	# include <sys/inotify.h>	451	# include <sys/inotify.h>
		452	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		453	# ifndef IN_DONT_FOLLOW
		454	# undef EV_USE_INOTIFY
		455	# define EV_USE_INOTIFY 0
240	#endif	456	# endif
		457	#endif
241		458
242	#if EV_SELECT_IS_WINSOCKET	459	#if EV_USE_EVENTFD
		460	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
243	# include <winsock.h>	461	# include <stdint.h>
		462	# ifndef EFD_NONBLOCK
		463	# define EFD_NONBLOCK O_NONBLOCK
		464	# endif
		465	# ifndef EFD_CLOEXEC
		466	# ifdef O_CLOEXEC
		467	# define EFD_CLOEXEC O_CLOEXEC
		468	# else
		469	# define EFD_CLOEXEC 02000000
		470	# endif
		471	# endif
		472	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
		473	#endif
		474
		475	#if EV_USE_SIGNALFD
		476	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		477	# include <stdint.h>
		478	# ifndef SFD_NONBLOCK
		479	# define SFD_NONBLOCK O_NONBLOCK
		480	# endif
		481	# ifndef SFD_CLOEXEC
		482	# ifdef O_CLOEXEC
		483	# define SFD_CLOEXEC O_CLOEXEC
		484	# else
		485	# define SFD_CLOEXEC 02000000
		486	# endif
		487	# endif
		488	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
		489
		490	struct signalfd_siginfo
		491	{
		492	uint32_t ssi_signo;
		493	char pad[128 - sizeof (uint32_t)];
		494	};
244	#endif	495	#endif
245		496
246	/**/	497	/**/
247		498
		499	#if EV_VERIFY >= 3
		500	# define EV_FREQUENT_CHECK ev_verify (EV_A)
		501	#else
		502	# define EV_FREQUENT_CHECK do { } while (0)
		503	#endif
		504
248	/*	505	/*
249	* This is used to avoid floating point rounding problems.	506	* This is used to work around floating point rounding problems.
250	* It is added to ev_rt_now when scheduling periodics
251	* to ensure progress, time-wise, even when rounding
252	* errors are against us.
253	* This value is good at least till the year 4000.	507	* This value is good at least till the year 4000.
254	* Better solutions welcome.
255	*/	508	*/
256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	509	#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
		510	/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
257		511
258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	512	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	513	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
260	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
261		514
		515	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
		516	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
		517
		518	/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
		519	/* ECB.H BEGIN */
		520	/*
		521	* libecb - http://software.schmorp.de/pkg/libecb
		522	*
		523	* Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
		524	* Copyright (©) 2011 Emanuele Giaquinta
		525	* All rights reserved.
		526	*
		527	* Redistribution and use in source and binary forms, with or without modifica-
		528	* tion, are permitted provided that the following conditions are met:
		529	*
		530	* 1. Redistributions of source code must retain the above copyright notice,
		531	* this list of conditions and the following disclaimer.
		532	*
		533	* 2. Redistributions in binary form must reproduce the above copyright
		534	* notice, this list of conditions and the following disclaimer in the
		535	* documentation and/or other materials provided with the distribution.
		536	*
		537	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		538	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		539	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		540	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		541	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		542	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		543	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		544	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		545	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		546	* OF THE POSSIBILITY OF SUCH DAMAGE.
		547	*
		548	* Alternatively, the contents of this file may be used under the terms of
		549	* the GNU General Public License ("GPL") version 2 or any later version,
		550	* in which case the provisions of the GPL are applicable instead of
		551	* the above. If you wish to allow the use of your version of this file
		552	* only under the terms of the GPL and not to allow others to use your
		553	* version of this file under the BSD license, indicate your decision
		554	* by deleting the provisions above and replace them with the notice
		555	* and other provisions required by the GPL. If you do not delete the
		556	* provisions above, a recipient may use your version of this file under
		557	* either the BSD or the GPL.
		558	*/
		559
		560	#ifndef ECB_H
		561	#define ECB_H
		562
		563	/* 16 bits major, 16 bits minor */
		564	#define ECB_VERSION 0x00010005
		565
		566	#ifdef _WIN32
		567	typedef signed char int8_t;
		568	typedef unsigned char uint8_t;
		569	typedef signed short int16_t;
		570	typedef unsigned short uint16_t;
		571	typedef signed int int32_t;
		572	typedef unsigned int uint32_t;
262	#if __GNUC__ >= 4	573	#if __GNUC__
		574	typedef signed long long int64_t;
		575	typedef unsigned long long uint64_t;
		576	#else /* _MSC_VER || __BORLANDC__ */
		577	typedef signed __int64 int64_t;
		578	typedef unsigned __int64 uint64_t;
		579	#endif
		580	#ifdef _WIN64
		581	#define ECB_PTRSIZE 8
		582	typedef uint64_t uintptr_t;
		583	typedef int64_t intptr_t;
		584	#else
		585	#define ECB_PTRSIZE 4
		586	typedef uint32_t uintptr_t;
		587	typedef int32_t intptr_t;
		588	#endif
		589	#else
		590	#include <inttypes.h>
		591	#if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
		592	#define ECB_PTRSIZE 8
		593	#else
		594	#define ECB_PTRSIZE 4
		595	#endif
		596	#endif
		597
		598	#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
		599	#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
		600
		601	/* work around x32 idiocy by defining proper macros */
		602	#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
		603	#if _ILP32
		604	#define ECB_AMD64_X32 1
		605	#else
		606	#define ECB_AMD64 1
		607	#endif
		608	#endif
		609
		610	/* many compilers define _GNUC_ to some versions but then only implement
		611	* what their idiot authors think are the "more important" extensions,
		612	* causing enormous grief in return for some better fake benchmark numbers.
		613	* or so.
		614	* we try to detect these and simply assume they are not gcc - if they have
		615	* an issue with that they should have done it right in the first place.
		616	*/
		617	#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
		618	#define ECB_GCC_VERSION(major,minor) 0
		619	#else
		620	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		621	#endif
		622
		623	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
		624
		625	#if __clang__ && defined __has_builtin
		626	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		627	#else
		628	#define ECB_CLANG_BUILTIN(x) 0
		629	#endif
		630
		631	#if __clang__ && defined __has_extension
		632	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		633	#else
		634	#define ECB_CLANG_EXTENSION(x) 0
		635	#endif
		636
		637	#define ECB_CPP (__cplusplus+0)
		638	#define ECB_CPP11 (__cplusplus >= 201103L)
		639	#define ECB_CPP14 (__cplusplus >= 201402L)
		640	#define ECB_CPP17 (__cplusplus >= 201703L)
		641
		642	#if ECB_CPP
		643	#define ECB_C 0
		644	#define ECB_STDC_VERSION 0
		645	#else
		646	#define ECB_C 1
		647	#define ECB_STDC_VERSION __STDC_VERSION__
		648	#endif
		649
		650	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		651	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		652	#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
		653
		654	#if ECB_CPP
		655	#define ECB_EXTERN_C extern "C"
		656	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		657	#define ECB_EXTERN_C_END }
		658	#else
		659	#define ECB_EXTERN_C extern
		660	#define ECB_EXTERN_C_BEG
		661	#define ECB_EXTERN_C_END
		662	#endif
		663
		664	/*****************************************************************************/
		665
		666	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		667	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		668
		669	#if ECB_NO_THREADS
		670	#define ECB_NO_SMP 1
		671	#endif
		672
		673	#if ECB_NO_SMP
		674	#define ECB_MEMORY_FENCE do { } while (0)
		675	#endif
		676
		677	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		678	#if __xlC__ && ECB_CPP
		679	#include <builtins.h>
		680	#endif
		681
		682	#if 1400 <= _MSC_VER
		683	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
		684	#endif
		685
		686	#ifndef ECB_MEMORY_FENCE
		687	#if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
		688	#if __i386 || __i386__
		689	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		690	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		691	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
		692	#elif ECB_GCC_AMD64
		693	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		694	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		695	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
		696	#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
		697	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		698	#elif defined __ARM_ARCH_2__ \
		699	|| defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
		700	|| defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
		701	|| defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
		702	|| defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
		703	|| defined __ARM_ARCH_5TEJ__
		704	/* should not need any, unless running old code on newer cpu - arm doesn't support that */
		705	#elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
		706	|| defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
		707	|| defined __ARM_ARCH_6T2__
		708	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		709	#elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
		710	|| defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
		711	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		712	#elif __aarch64__
		713	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		714	#elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
		715	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
		716	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
		717	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
		718	#elif defined __s390__ || defined __s390x__
		719	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		720	#elif defined __mips__
		721	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		722	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
		723	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		724	#elif defined __alpha__
		725	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		726	#elif defined __hppa__
		727	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		728	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		729	#elif defined __ia64__
		730	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		731	#elif defined __m68k__
		732	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		733	#elif defined __m88k__
		734	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		735	#elif defined __sh__
		736	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		737	#endif
		738	#endif
		739	#endif
		740
		741	#ifndef ECB_MEMORY_FENCE
		742	#if ECB_GCC_VERSION(4,7)
		743	/* see comment below (stdatomic.h) about the C11 memory model. */
		744	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		745	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		746	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		747
		748	#elif ECB_CLANG_EXTENSION(c_atomic)
		749	/* see comment below (stdatomic.h) about the C11 memory model. */
		750	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		751	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		752	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		753
		754	#elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
		755	#define ECB_MEMORY_FENCE __sync_synchronize ()
		756	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		757	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		758	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		759	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		760	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		761	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
		762	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		763	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		764	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		765	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		766	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		767	#elif defined _WIN32
		768	#include <WinNT.h>
		769	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		770	#elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
		771	#include <mbarrier.h>
		772	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		773	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		774	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		775	#elif __xlC__
		776	#define ECB_MEMORY_FENCE __sync ()
		777	#endif
		778	#endif
		779
		780	#ifndef ECB_MEMORY_FENCE
		781	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		782	/* we assume that these memory fences work on all variables/all memory accesses, */
		783	/* not just C11 atomics and atomic accesses */
		784	#include <stdatomic.h>
		785	/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
		786	/* any fence other than seq_cst, which isn't very efficient for us. */
		787	/* Why that is, we don't know - either the C11 memory model is quite useless */
		788	/* for most usages, or gcc and clang have a bug */
		789	/* I *currently* lean towards the latter, and inefficiently implement */
		790	/* all three of ecb's fences as a seq_cst fence */
		791	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		792	/* for all __atomic_thread_fence's except seq_cst */
		793	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		794	#endif
		795	#endif
		796
		797	#ifndef ECB_MEMORY_FENCE
		798	#if !ECB_AVOID_PTHREADS
		799	/*
		800	* if you get undefined symbol references to pthread_mutex_lock,
		801	* or failure to find pthread.h, then you should implement
		802	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		803	* OR provide pthread.h and link against the posix thread library
		804	* of your system.
		805	*/
		806	#include <pthread.h>
		807	#define ECB_NEEDS_PTHREADS 1
		808	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		809
		810	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		811	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		812	#endif
		813	#endif
		814
		815	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		816	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		817	#endif
		818
		819	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		820	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		821	#endif
		822
		823	/*****************************************************************************/
		824
		825	#if ECB_CPP
		826	#define ecb_inline static inline
		827	#elif ECB_GCC_VERSION(2,5)
		828	#define ecb_inline static __inline__
		829	#elif ECB_C99
		830	#define ecb_inline static inline
		831	#else
		832	#define ecb_inline static
		833	#endif
		834
		835	#if ECB_GCC_VERSION(3,3)
		836	#define ecb_restrict __restrict__
		837	#elif ECB_C99
		838	#define ecb_restrict restrict
		839	#else
		840	#define ecb_restrict
		841	#endif
		842
		843	typedef int ecb_bool;
		844
		845	#define ECB_CONCAT_(a, b) a ## b
		846	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
		847	#define ECB_STRINGIFY_(a) # a
		848	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		849	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
		850
		851	#define ecb_function_ ecb_inline
		852
		853	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
		854	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		855	#else
		856	#define ecb_attribute(attrlist)
		857	#endif
		858
		859	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
		860	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		861	#else
		862	/* possible C11 impl for integral types
		863	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		864	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
		865
		866	#define ecb_is_constant(expr) 0
		867	#endif
		868
		869	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
263	# define expect(expr,value) __builtin_expect ((expr),(value))	870	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
264	# define noinline __attribute__ ((noinline))
265	#else	871	#else
266	# define expect(expr,value) (expr)	872	#define ecb_expect(expr,value) (expr)
267	# define noinline
268	# if __STDC_VERSION__ < 199901L
269	# define inline
270	# endif	873	#endif
271	#endif
272		874
		875	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
		876	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		877	#else
		878	#define ecb_prefetch(addr,rw,locality)
		879	#endif
		880
		881	/* no emulation for ecb_decltype */
		882	#if ECB_CPP11
		883	// older implementations might have problems with decltype(x)::type, work around it
		884	template<class T> struct ecb_decltype_t { typedef T type; };
		885	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
		886	#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
		887	#define ecb_decltype(x) __typeof__ (x)
		888	#endif
		889
		890	#if _MSC_VER >= 1300
		891	#define ecb_deprecated __declspec (deprecated)
		892	#else
		893	#define ecb_deprecated ecb_attribute ((__deprecated__))
		894	#endif
		895
		896	#if _MSC_VER >= 1500
		897	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		898	#elif ECB_GCC_VERSION(4,5)
		899	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		900	#else
		901	#define ecb_deprecated_message(msg) ecb_deprecated
		902	#endif
		903
		904	#if _MSC_VER >= 1400
		905	#define ecb_noinline __declspec (noinline)
		906	#else
		907	#define ecb_noinline ecb_attribute ((__noinline__))
		908	#endif
		909
		910	#define ecb_unused ecb_attribute ((__unused__))
		911	#define ecb_const ecb_attribute ((__const__))
		912	#define ecb_pure ecb_attribute ((__pure__))
		913
		914	#if ECB_C11 || __IBMC_NORETURN
		915	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		916	#define ecb_noreturn _Noreturn
		917	#elif ECB_CPP11
		918	#define ecb_noreturn [[noreturn]]
		919	#elif _MSC_VER >= 1200
		920	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		921	#define ecb_noreturn __declspec (noreturn)
		922	#else
		923	#define ecb_noreturn ecb_attribute ((__noreturn__))
		924	#endif
		925
		926	#if ECB_GCC_VERSION(4,3)
		927	#define ecb_artificial ecb_attribute ((__artificial__))
		928	#define ecb_hot ecb_attribute ((__hot__))
		929	#define ecb_cold ecb_attribute ((__cold__))
		930	#else
		931	#define ecb_artificial
		932	#define ecb_hot
		933	#define ecb_cold
		934	#endif
		935
		936	/* put around conditional expressions if you are very sure that the */
		937	/* expression is mostly true or mostly false. note that these return */
		938	/* booleans, not the expression. */
273	#define expect_false(expr) expect ((expr) != 0, 0)	939	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
274	#define expect_true(expr) expect ((expr) != 0, 1)	940	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		941	/* for compatibility to the rest of the world */
		942	#define ecb_likely(expr) ecb_expect_true (expr)
		943	#define ecb_unlikely(expr) ecb_expect_false (expr)
		944
		945	/* count trailing zero bits and count # of one bits */
		946	#if ECB_GCC_VERSION(3,4) \
		947	|| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		948	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		949	&& ECB_CLANG_BUILTIN(__builtin_popcount))
		950	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		951	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		952	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		953	#define ecb_ctz32(x) __builtin_ctz (x)
		954	#define ecb_ctz64(x) __builtin_ctzll (x)
		955	#define ecb_popcount32(x) __builtin_popcount (x)
		956	/* no popcountll */
		957	#else
		958	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
		959	ecb_function_ ecb_const int
		960	ecb_ctz32 (uint32_t x)
		961	{
		962	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		963	unsigned long r;
		964	_BitScanForward (&r, x);
		965	return (int)r;
		966	#else
		967	int r = 0;
		968
		969	x &= ~x + 1; /* this isolates the lowest bit */
		970
		971	#if ECB_branchless_on_i386
		972	r += !!(x & 0xaaaaaaaa) << 0;
		973	r += !!(x & 0xcccccccc) << 1;
		974	r += !!(x & 0xf0f0f0f0) << 2;
		975	r += !!(x & 0xff00ff00) << 3;
		976	r += !!(x & 0xffff0000) << 4;
		977	#else
		978	if (x & 0xaaaaaaaa) r += 1;
		979	if (x & 0xcccccccc) r += 2;
		980	if (x & 0xf0f0f0f0) r += 4;
		981	if (x & 0xff00ff00) r += 8;
		982	if (x & 0xffff0000) r += 16;
		983	#endif
		984
		985	return r;
		986	#endif
		987	}
		988
		989	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
		990	ecb_function_ ecb_const int
		991	ecb_ctz64 (uint64_t x)
		992	{
		993	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		994	unsigned long r;
		995	_BitScanForward64 (&r, x);
		996	return (int)r;
		997	#else
		998	int shift = x & 0xffffffff ? 0 : 32;
		999	return ecb_ctz32 (x >> shift) + shift;
		1000	#endif
		1001	}
		1002
		1003	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
		1004	ecb_function_ ecb_const int
		1005	ecb_popcount32 (uint32_t x)
		1006	{
		1007	x -= (x >> 1) & 0x55555555;
		1008	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		1009	x = ((x >> 4) + x) & 0x0f0f0f0f;
		1010	x *= 0x01010101;
		1011
		1012	return x >> 24;
		1013	}
		1014
		1015	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
		1016	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
		1017	{
		1018	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		1019	unsigned long r;
		1020	_BitScanReverse (&r, x);
		1021	return (int)r;
		1022	#else
		1023	int r = 0;
		1024
		1025	if (x >> 16) { x >>= 16; r += 16; }
		1026	if (x >> 8) { x >>= 8; r += 8; }
		1027	if (x >> 4) { x >>= 4; r += 4; }
		1028	if (x >> 2) { x >>= 2; r += 2; }
		1029	if (x >> 1) { r += 1; }
		1030
		1031	return r;
		1032	#endif
		1033	}
		1034
		1035	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
		1036	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
		1037	{
		1038	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		1039	unsigned long r;
		1040	_BitScanReverse64 (&r, x);
		1041	return (int)r;
		1042	#else
		1043	int r = 0;
		1044
		1045	if (x >> 32) { x >>= 32; r += 32; }
		1046
		1047	return r + ecb_ld32 (x);
		1048	#endif
		1049	}
		1050	#endif
		1051
		1052	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		1053	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		1054	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		1055	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		1056
		1057	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
		1058	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
		1059	{
		1060	return ( (x * 0x0802U & 0x22110U)
		1061	| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		1062	}
		1063
		1064	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
		1065	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
		1066	{
		1067	x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
		1068	x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
		1069	x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
		1070	x = ( x >> 8 ) | ( x << 8);
		1071
		1072	return x;
		1073	}
		1074
		1075	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
		1076	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
		1077	{
		1078	x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
		1079	x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
		1080	x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
		1081	x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
		1082	x = ( x >> 16 ) | ( x << 16);
		1083
		1084	return x;
		1085	}
		1086
		1087	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		1088	/* so for this version we are lazy */
		1089	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
		1090	ecb_function_ ecb_const int
		1091	ecb_popcount64 (uint64_t x)
		1092	{
		1093	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		1094	}
		1095
		1096	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
		1097	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
		1098	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
		1099	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
		1100	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
		1101	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
		1102	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
		1103	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
		1104
		1105	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
		1106	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
		1107	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
		1108	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
		1109	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
		1110	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
		1111	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
		1112	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
		1113
		1114	#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		1115	#if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
		1116	#define ecb_bswap16(x) __builtin_bswap16 (x)
		1117	#else
		1118	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		1119	#endif
		1120	#define ecb_bswap32(x) __builtin_bswap32 (x)
		1121	#define ecb_bswap64(x) __builtin_bswap64 (x)
		1122	#elif _MSC_VER
		1123	#include <stdlib.h>
		1124	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		1125	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		1126	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
		1127	#else
		1128	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
		1129	ecb_function_ ecb_const uint16_t
		1130	ecb_bswap16 (uint16_t x)
		1131	{
		1132	return ecb_rotl16 (x, 8);
		1133	}
		1134
		1135	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
		1136	ecb_function_ ecb_const uint32_t
		1137	ecb_bswap32 (uint32_t x)
		1138	{
		1139	return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
		1140	}
		1141
		1142	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
		1143	ecb_function_ ecb_const uint64_t
		1144	ecb_bswap64 (uint64_t x)
		1145	{
		1146	return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
		1147	}
		1148	#endif
		1149
		1150	#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
		1151	#define ecb_unreachable() __builtin_unreachable ()
		1152	#else
		1153	/* this seems to work fine, but gcc always emits a warning for it :/ */
		1154	ecb_inline ecb_noreturn void ecb_unreachable (void);
		1155	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
		1156	#endif
		1157
		1158	/* try to tell the compiler that some condition is definitely true */
		1159	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
		1160
		1161	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
		1162	ecb_inline ecb_const uint32_t
		1163	ecb_byteorder_helper (void)
		1164	{
		1165	/* the union code still generates code under pressure in gcc, */
		1166	/* but less than using pointers, and always seems to */
		1167	/* successfully return a constant. */
		1168	/* the reason why we have this horrible preprocessor mess */
		1169	/* is to avoid it in all cases, at least on common architectures */
		1170	/* or when using a recent enough gcc version (>= 4.6) */
		1171	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		1172	|| ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
		1173	#define ECB_LITTLE_ENDIAN 1
		1174	return 0x44332211;
		1175	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		1176	|| ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
		1177	#define ECB_BIG_ENDIAN 1
		1178	return 0x11223344;
		1179	#else
		1180	union
		1181	{
		1182	uint8_t c[4];
		1183	uint32_t u;
		1184	} u = { 0x11, 0x22, 0x33, 0x44 };
		1185	return u.u;
		1186	#endif
		1187	}
		1188
		1189	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
		1190	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
		1191	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
		1192	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
		1193
		1194	#if ECB_GCC_VERSION(3,0) || ECB_C99
		1195	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		1196	#else
		1197	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		1198	#endif
		1199
		1200	#if ECB_CPP
		1201	template<typename T>
		1202	static inline T ecb_div_rd (T val, T div)
		1203	{
		1204	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		1205	}
		1206	template<typename T>
		1207	static inline T ecb_div_ru (T val, T div)
		1208	{
		1209	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		1210	}
		1211	#else
		1212	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		1213	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		1214	#endif
		1215
		1216	#if ecb_cplusplus_does_not_suck
		1217	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
		1218	template<typename T, int N>
		1219	static inline int ecb_array_length (const T (&arr)[N])
		1220	{
		1221	return N;
		1222	}
		1223	#else
		1224	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		1225	#endif
		1226
		1227	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		1228	ecb_function_ ecb_const uint32_t
		1229	ecb_binary16_to_binary32 (uint32_t x)
		1230	{
		1231	unsigned int s = (x & 0x8000) << (31 - 15);
		1232	int e = (x >> 10) & 0x001f;
		1233	unsigned int m = x & 0x03ff;
		1234
		1235	if (ecb_expect_false (e == 31))
		1236	/* infinity or NaN */
		1237	e = 255 - (127 - 15);
		1238	else if (ecb_expect_false (!e))
		1239	{
		1240	if (ecb_expect_true (!m))
		1241	/* zero, handled by code below by forcing e to 0 */
		1242	e = 0 - (127 - 15);
		1243	else
		1244	{
		1245	/* subnormal, renormalise */
		1246	unsigned int s = 10 - ecb_ld32 (m);
		1247
		1248	m = (m << s) & 0x3ff; /* mask implicit bit */
		1249	e -= s - 1;
		1250	}
		1251	}
		1252
		1253	/* e and m now are normalised, or zero, (or inf or nan) */
		1254	e += 127 - 15;
		1255
		1256	return s | (e << 23) | (m << (23 - 10));
		1257	}
		1258
		1259	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		1260	ecb_function_ ecb_const uint16_t
		1261	ecb_binary32_to_binary16 (uint32_t x)
		1262	{
		1263	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		1264	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		1265	unsigned int m = x & 0x007fffff;
		1266
		1267	x &= 0x7fffffff;
		1268
		1269	/* if it's within range of binary16 normals, use fast path */
		1270	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		1271	{
		1272	/* mantissa round-to-even */
		1273	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		1274
		1275	/* handle overflow */
		1276	if (ecb_expect_false (m >= 0x00800000))
		1277	{
		1278	m >>= 1;
		1279	e += 1;
		1280	}
		1281
		1282	return s | (e << 10) | (m >> (23 - 10));
		1283	}
		1284
		1285	/* handle large numbers and infinity */
		1286	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		1287	return s | 0x7c00;
		1288
		1289	/* handle zero, subnormals and small numbers */
		1290	if (ecb_expect_true (x < 0x38800000))
		1291	{
		1292	/* zero */
		1293	if (ecb_expect_true (!x))
		1294	return s;
		1295
		1296	/* handle subnormals */
		1297
		1298	/* too small, will be zero */
		1299	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		1300	return s;
		1301
		1302	m |= 0x00800000; /* make implicit bit explicit */
		1303
		1304	/* very tricky - we need to round to the nearest e (+10) bit value */
		1305	{
		1306	unsigned int bits = 14 - e;
		1307	unsigned int half = (1 << (bits - 1)) - 1;
		1308	unsigned int even = (m >> bits) & 1;
		1309
		1310	/* if this overflows, we will end up with a normalised number */
		1311	m = (m + half + even) >> bits;
		1312	}
		1313
		1314	return s | m;
		1315	}
		1316
		1317	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		1318	m >>= 13;
		1319
		1320	return s | 0x7c00 | m | !m;
		1321	}
		1322
		1323	/*******************************************************************************/
		1324	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		1325
		1326	/* basically, everything uses "ieee pure-endian" floating point numbers */
		1327	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		1328	#if 0 \
		1329	|| __i386 || __i386__ \
		1330	|| ECB_GCC_AMD64 \
		1331	|| __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
		1332	|| defined __s390__ || defined __s390x__ \
		1333	|| defined __mips__ \
		1334	|| defined __alpha__ \
		1335	|| defined __hppa__ \
		1336	|| defined __ia64__ \
		1337	|| defined __m68k__ \
		1338	|| defined __m88k__ \
		1339	|| defined __sh__ \
		1340	|| defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
		1341	|| (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
		1342	|| defined __aarch64__
		1343	#define ECB_STDFP 1
		1344	#include <string.h> /* for memcpy */
		1345	#else
		1346	#define ECB_STDFP 0
		1347	#endif
		1348
		1349	#ifndef ECB_NO_LIBM
		1350
		1351	#include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
		1352
		1353	/* only the oldest of old doesn't have this one. solaris. */
		1354	#ifdef INFINITY
		1355	#define ECB_INFINITY INFINITY
		1356	#else
		1357	#define ECB_INFINITY HUGE_VAL
		1358	#endif
		1359
		1360	#ifdef NAN
		1361	#define ECB_NAN NAN
		1362	#else
		1363	#define ECB_NAN ECB_INFINITY
		1364	#endif
		1365
		1366	#if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
		1367	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		1368	#define ecb_frexpf(x,e) frexpf ((x), (e))
		1369	#else
		1370	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		1371	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		1372	#endif
		1373
		1374	/* convert a float to ieee single/binary32 */
		1375	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		1376	ecb_function_ ecb_const uint32_t
		1377	ecb_float_to_binary32 (float x)
		1378	{
		1379	uint32_t r;
		1380
		1381	#if ECB_STDFP
		1382	memcpy (&r, &x, 4);
		1383	#else
		1384	/* slow emulation, works for anything but -0 */
		1385	uint32_t m;
		1386	int e;
		1387
		1388	if (x == 0e0f ) return 0x00000000U;
		1389	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		1390	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		1391	if (x != x ) return 0x7fbfffffU;
		1392
		1393	m = ecb_frexpf (x, &e) * 0x1000000U;
		1394
		1395	r = m & 0x80000000U;
		1396
		1397	if (r)
		1398	m = -m;
		1399
		1400	if (e <= -126)
		1401	{
		1402	m &= 0xffffffU;
		1403	m >>= (-125 - e);
		1404	e = -126;
		1405	}
		1406
		1407	r |= (e + 126) << 23;
		1408	r |= m & 0x7fffffU;
		1409	#endif
		1410
		1411	return r;
		1412	}
		1413
		1414	/* converts an ieee single/binary32 to a float */
		1415	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		1416	ecb_function_ ecb_const float
		1417	ecb_binary32_to_float (uint32_t x)
		1418	{
		1419	float r;
		1420
		1421	#if ECB_STDFP
		1422	memcpy (&r, &x, 4);
		1423	#else
		1424	/* emulation, only works for normals and subnormals and +0 */
		1425	int neg = x >> 31;
		1426	int e = (x >> 23) & 0xffU;
		1427
		1428	x &= 0x7fffffU;
		1429
		1430	if (e)
		1431	x |= 0x800000U;
		1432	else
		1433	e = 1;
		1434
		1435	/* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
		1436	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		1437
		1438	r = neg ? -r : r;
		1439	#endif
		1440
		1441	return r;
		1442	}
		1443
		1444	/* convert a double to ieee double/binary64 */
		1445	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		1446	ecb_function_ ecb_const uint64_t
		1447	ecb_double_to_binary64 (double x)
		1448	{
		1449	uint64_t r;
		1450
		1451	#if ECB_STDFP
		1452	memcpy (&r, &x, 8);
		1453	#else
		1454	/* slow emulation, works for anything but -0 */
		1455	uint64_t m;
		1456	int e;
		1457
		1458	if (x == 0e0 ) return 0x0000000000000000U;
		1459	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		1460	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		1461	if (x != x ) return 0X7ff7ffffffffffffU;
		1462
		1463	m = frexp (x, &e) * 0x20000000000000U;
		1464
		1465	r = m & 0x8000000000000000;;
		1466
		1467	if (r)
		1468	m = -m;
		1469
		1470	if (e <= -1022)
		1471	{
		1472	m &= 0x1fffffffffffffU;
		1473	m >>= (-1021 - e);
		1474	e = -1022;
		1475	}
		1476
		1477	r |= ((uint64_t)(e + 1022)) << 52;
		1478	r |= m & 0xfffffffffffffU;
		1479	#endif
		1480
		1481	return r;
		1482	}
		1483
		1484	/* converts an ieee double/binary64 to a double */
		1485	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		1486	ecb_function_ ecb_const double
		1487	ecb_binary64_to_double (uint64_t x)
		1488	{
		1489	double r;
		1490
		1491	#if ECB_STDFP
		1492	memcpy (&r, &x, 8);
		1493	#else
		1494	/* emulation, only works for normals and subnormals and +0 */
		1495	int neg = x >> 63;
		1496	int e = (x >> 52) & 0x7ffU;
		1497
		1498	x &= 0xfffffffffffffU;
		1499
		1500	if (e)
		1501	x |= 0x10000000000000U;
		1502	else
		1503	e = 1;
		1504
		1505	/* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
		1506	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		1507
		1508	r = neg ? -r : r;
		1509	#endif
		1510
		1511	return r;
		1512	}
		1513
		1514	/* convert a float to ieee half/binary16 */
		1515	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1516	ecb_function_ ecb_const uint16_t
		1517	ecb_float_to_binary16 (float x)
		1518	{
		1519	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1520	}
		1521
		1522	/* convert an ieee half/binary16 to float */
		1523	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1524	ecb_function_ ecb_const float
		1525	ecb_binary16_to_float (uint16_t x)
		1526	{
		1527	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1528	}
		1529
		1530	#endif
		1531
		1532	#endif
		1533
		1534	/* ECB.H END */
		1535
		1536	#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
		1537	/* if your architecture doesn't need memory fences, e.g. because it is
		1538	* single-cpu/core, or if you use libev in a project that doesn't use libev
		1539	* from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
		1540	* libev, in which cases the memory fences become nops.
		1541	* alternatively, you can remove this #error and link against libpthread,
		1542	* which will then provide the memory fences.
		1543	*/
		1544	# error "memory fences not defined for your architecture, please report"
		1545	#endif
		1546
		1547	#ifndef ECB_MEMORY_FENCE
		1548	# define ECB_MEMORY_FENCE do { } while (0)
		1549	# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		1550	# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		1551	#endif
		1552
		1553	#define expect_false(cond) ecb_expect_false (cond)
		1554	#define expect_true(cond) ecb_expect_true (cond)
		1555	#define noinline ecb_noinline
		1556
275	#define inline_size static inline	1557	#define inline_size ecb_inline
276		1558
277	#if EV_MINIMAL	1559	#if EV_FEATURE_CODE
278	# define inline_speed static noinline
279	#else
280	# define inline_speed static inline	1560	# define inline_speed ecb_inline
		1561	#else
		1562	# define inline_speed noinline static
281	#endif	1563	#endif
282		1564
283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	1565	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		1566
		1567	#if EV_MINPRI == EV_MAXPRI
		1568	# define ABSPRI(w) (((W)w), 0)
		1569	#else
284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	1570	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		1571	#endif
285		1572
286	#define EMPTY /* required for microsofts broken pseudo-c compiler */	1573	#define EMPTY /* required for microsofts broken pseudo-c compiler */
287	#define EMPTY2(a,b) /* used to suppress some warnings */
288		1574
289	typedef ev_watcher *W;	1575	typedef ev_watcher *W;
290	typedef ev_watcher_list *WL;	1576	typedef ev_watcher_list *WL;
291	typedef ev_watcher_time *WT;	1577	typedef ev_watcher_time *WT;
292		1578
		1579	#define ev_active(w) ((W)(w))->active
		1580	#define ev_at(w) ((WT)(w))->at
		1581
		1582	#if EV_USE_REALTIME
		1583	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		1584	/* giving it a reasonably high chance of working on typical architectures */
		1585	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		1586	#endif
		1587
293	#if EV_USE_MONOTONIC	1588	#if EV_USE_MONOTONIC
294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295	/* giving it a reasonably high chance of working on typical architetcures */
296	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	1589	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		1590	#endif
		1591
		1592	#ifndef EV_FD_TO_WIN32_HANDLE
		1593	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		1594	#endif
		1595	#ifndef EV_WIN32_HANDLE_TO_FD
		1596	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		1597	#endif
		1598	#ifndef EV_WIN32_CLOSE_FD
		1599	# define EV_WIN32_CLOSE_FD(fd) close (fd)
297	#endif	1600	#endif
298		1601
299	#ifdef _WIN32	1602	#ifdef _WIN32
300	# include "ev_win32.c"	1603	# include "ev_win32.c"
301	#endif	1604	#endif
302		1605
303	/*****************************************************************************/	1606	/*****************************************************************************/
304		1607
		1608	/* define a suitable floor function (only used by periodics atm) */
		1609
		1610	#if EV_USE_FLOOR
		1611	# include <math.h>
		1612	# define ev_floor(v) floor (v)
		1613	#else
		1614
		1615	#include <float.h>
		1616
		1617	/* a floor() replacement function, should be independent of ev_tstamp type */
		1618	noinline
		1619	static ev_tstamp
		1620	ev_floor (ev_tstamp v)
		1621	{
		1622	/* the choice of shift factor is not terribly important */
		1623	#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
		1624	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
		1625	#else
		1626	const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
		1627	#endif
		1628
		1629	/* argument too large for an unsigned long? */
		1630	if (expect_false (v >= shift))
		1631	{
		1632	ev_tstamp f;
		1633
		1634	if (v == v - 1.)
		1635	return v; /* very large number */
		1636
		1637	f = shift * ev_floor (v * (1. / shift));
		1638	return f + ev_floor (v - f);
		1639	}
		1640
		1641	/* special treatment for negative args? */
		1642	if (expect_false (v < 0.))
		1643	{
		1644	ev_tstamp f = -ev_floor (-v);
		1645
		1646	return f - (f == v ? 0 : 1);
		1647	}
		1648
		1649	/* fits into an unsigned long */
		1650	return (unsigned long)v;
		1651	}
		1652
		1653	#endif
		1654
		1655	/*****************************************************************************/
		1656
		1657	#ifdef __linux
		1658	# include <sys/utsname.h>
		1659	#endif
		1660
		1661	noinline ecb_cold
		1662	static unsigned int
		1663	ev_linux_version (void)
		1664	{
		1665	#ifdef __linux
		1666	unsigned int v = 0;
		1667	struct utsname buf;
		1668	int i;
		1669	char *p = buf.release;
		1670
		1671	if (uname (&buf))
		1672	return 0;
		1673
		1674	for (i = 3+1; --i; )
		1675	{
		1676	unsigned int c = 0;
		1677
		1678	for (;;)
		1679	{
		1680	if (*p >= '0' && *p <= '9')
		1681	c = c * 10 + *p++ - '0';
		1682	else
		1683	{
		1684	p += *p == '.';
		1685	break;
		1686	}
		1687	}
		1688
		1689	v = (v << 8) | c;
		1690	}
		1691
		1692	return v;
		1693	#else
		1694	return 0;
		1695	#endif
		1696	}
		1697
		1698	/*****************************************************************************/
		1699
		1700	#if EV_AVOID_STDIO
		1701	noinline ecb_cold
		1702	static void
		1703	ev_printerr (const char *msg)
		1704	{
		1705	write (STDERR_FILENO, msg, strlen (msg));
		1706	}
		1707	#endif
		1708
305	static void (*syserr_cb)(const char *msg);	1709	static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
306		1710
		1711	ecb_cold
307	void	1712	void
308	ev_set_syserr_cb (void (*cb)(const char *msg))	1713	ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
309	{	1714	{
310	syserr_cb = cb;	1715	syserr_cb = cb;
311	}	1716	}
312		1717
313	static void noinline	1718	noinline ecb_cold
		1719	static void
314	syserr (const char *msg)	1720	ev_syserr (const char *msg)
315	{	1721	{
316	if (!msg)	1722	if (!msg)
317	msg = "(libev) system error";	1723	msg = "(libev) system error";
318		1724
319	if (syserr_cb)	1725	if (syserr_cb)
320	syserr_cb (msg);	1726	syserr_cb (msg);
321	else	1727	else
322	{	1728	{
		1729	#if EV_AVOID_STDIO
		1730	ev_printerr (msg);
		1731	ev_printerr (": ");
		1732	ev_printerr (strerror (errno));
		1733	ev_printerr ("\n");
		1734	#else
323	perror (msg);	1735	perror (msg);
		1736	#endif
324	abort ();	1737	abort ();
325	}	1738	}
326	}	1739	}
327		1740
328	static void *(*alloc)(void *ptr, long size);	1741	static void *
		1742	ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
		1743	{
		1744	/* some systems, notably openbsd and darwin, fail to properly
		1745	* implement realloc (x, 0) (as required by both ansi c-89 and
		1746	* the single unix specification, so work around them here.
		1747	* recently, also (at least) fedora and debian started breaking it,
		1748	* despite documenting it otherwise.
		1749	*/
329		1750
		1751	if (size)
		1752	return realloc (ptr, size);
		1753
		1754	free (ptr);
		1755	return 0;
		1756	}
		1757
		1758	static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
		1759
		1760	ecb_cold
330	void	1761	void
331	ev_set_allocator (void *(*cb)(void *ptr, long size))	1762	ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
332	{	1763	{
333	alloc = cb;	1764	alloc = cb;
334	}	1765	}
335		1766
336	inline_speed void *	1767	inline_speed void *
337	ev_realloc (void *ptr, long size)	1768	ev_realloc (void *ptr, long size)
338	{	1769	{
339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	1770	ptr = alloc (ptr, size);
340		1771
341	if (!ptr && size)	1772	if (!ptr && size)
342	{	1773	{
		1774	#if EV_AVOID_STDIO
		1775	ev_printerr ("(libev) memory allocation failed, aborting.\n");
		1776	#else
343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	1777	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
		1778	#endif
344	abort ();	1779	abort ();
345	}	1780	}
346		1781
347	return ptr;	1782	return ptr;
348	}	1783	}
…		…
350	#define ev_malloc(size) ev_realloc (0, (size))	1785	#define ev_malloc(size) ev_realloc (0, (size))
351	#define ev_free(ptr) ev_realloc ((ptr), 0)	1786	#define ev_free(ptr) ev_realloc ((ptr), 0)
352		1787
353	/*****************************************************************************/	1788	/*****************************************************************************/
354		1789
		1790	/* set in reify when reification needed */
		1791	#define EV_ANFD_REIFY 1
		1792
		1793	/* file descriptor info structure */
355	typedef struct	1794	typedef struct
356	{	1795	{
357	WL head;	1796	WL head;
358	unsigned char events;	1797	unsigned char events; /* the events watched for */
		1798	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		1799	unsigned char emask; /* some backends store the actual kernel mask in here */
359	unsigned char reify;	1800	unsigned char unused;
		1801	#if EV_USE_EPOLL
		1802	unsigned int egen; /* generation counter to counter epoll bugs */
		1803	#endif
360	#if EV_SELECT_IS_WINSOCKET	1804	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
361	SOCKET handle;	1805	SOCKET handle;
362	#endif	1806	#endif
		1807	#if EV_USE_IOCP
		1808	OVERLAPPED or, ow;
		1809	#endif
363	} ANFD;	1810	} ANFD;
364		1811
		1812	/* stores the pending event set for a given watcher */
365	typedef struct	1813	typedef struct
366	{	1814	{
367	W w;	1815	W w;
368	int events;	1816	int events; /* the pending event set for the given watcher */
369	} ANPENDING;	1817	} ANPENDING;
370		1818
371	#if EV_USE_INOTIFY	1819	#if EV_USE_INOTIFY
		1820	/* hash table entry per inotify-id */
372	typedef struct	1821	typedef struct
373	{	1822	{
374	WL head;	1823	WL head;
375	} ANFS;	1824	} ANFS;
		1825	#endif
		1826
		1827	/* Heap Entry */
		1828	#if EV_HEAP_CACHE_AT
		1829	/* a heap element */
		1830	typedef struct {
		1831	ev_tstamp at;
		1832	WT w;
		1833	} ANHE;
		1834
		1835	#define ANHE_w(he) (he).w /* access watcher, read-write */
		1836	#define ANHE_at(he) (he).at /* access cached at, read-only */
		1837	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		1838	#else
		1839	/* a heap element */
		1840	typedef WT ANHE;
		1841
		1842	#define ANHE_w(he) (he)
		1843	#define ANHE_at(he) (he)->at
		1844	#define ANHE_at_cache(he)
376	#endif	1845	#endif
377		1846
378	#if EV_MULTIPLICITY	1847	#if EV_MULTIPLICITY
379		1848
380	struct ev_loop	1849	struct ev_loop
…		…
386	#undef VAR	1855	#undef VAR
387	};	1856	};
388	#include "ev_wrap.h"	1857	#include "ev_wrap.h"
389		1858
390	static struct ev_loop default_loop_struct;	1859	static struct ev_loop default_loop_struct;
391	struct ev_loop *ev_default_loop_ptr;	1860	EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
392		1861
393	#else	1862	#else
394		1863
395	ev_tstamp ev_rt_now;	1864	EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
396	#define VAR(name,decl) static decl;	1865	#define VAR(name,decl) static decl;
397	#include "ev_vars.h"	1866	#include "ev_vars.h"
398	#undef VAR	1867	#undef VAR
399		1868
400	static int ev_default_loop_ptr;	1869	static int ev_default_loop_ptr;
401		1870
402	#endif	1871	#endif
403		1872
		1873	#if EV_FEATURE_API
		1874	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		1875	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		1876	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		1877	#else
		1878	# define EV_RELEASE_CB (void)0
		1879	# define EV_ACQUIRE_CB (void)0
		1880	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		1881	#endif
		1882
		1883	#define EVBREAK_RECURSE 0x80
		1884
404	/*****************************************************************************/	1885	/*****************************************************************************/
405		1886
		1887	#ifndef EV_HAVE_EV_TIME
406	ev_tstamp	1888	ev_tstamp
407	ev_time (void)	1889	ev_time (void) EV_NOEXCEPT
408	{	1890	{
409	#if EV_USE_REALTIME	1891	#if EV_USE_REALTIME
		1892	if (expect_true (have_realtime))
		1893	{
410	struct timespec ts;	1894	struct timespec ts;
411	clock_gettime (CLOCK_REALTIME, &ts);	1895	clock_gettime (CLOCK_REALTIME, &ts);
412	return ts.tv_sec + ts.tv_nsec * 1e-9;	1896	return ts.tv_sec + ts.tv_nsec * 1e-9;
413	#else	1897	}
		1898	#endif
		1899
414	struct timeval tv;	1900	struct timeval tv;
415	gettimeofday (&tv, 0);	1901	gettimeofday (&tv, 0);
416	return tv.tv_sec + tv.tv_usec * 1e-6;	1902	return tv.tv_sec + tv.tv_usec * 1e-6;
417	#endif
418	}	1903	}
		1904	#endif
419		1905
420	ev_tstamp inline_size	1906	inline_size ev_tstamp
421	get_clock (void)	1907	get_clock (void)
422	{	1908	{
423	#if EV_USE_MONOTONIC	1909	#if EV_USE_MONOTONIC
424	if (expect_true (have_monotonic))	1910	if (expect_true (have_monotonic))
425	{	1911	{
…		…
432	return ev_time ();	1918	return ev_time ();
433	}	1919	}
434		1920
435	#if EV_MULTIPLICITY	1921	#if EV_MULTIPLICITY
436	ev_tstamp	1922	ev_tstamp
437	ev_now (EV_P)	1923	ev_now (EV_P) EV_NOEXCEPT
438	{	1924	{
439	return ev_rt_now;	1925	return ev_rt_now;
440	}	1926	}
441	#endif	1927	#endif
442		1928
443	void	1929	void
444	ev_sleep (ev_tstamp delay)	1930	ev_sleep (ev_tstamp delay) EV_NOEXCEPT
445	{	1931	{
446	if (delay > 0.)	1932	if (delay > 0.)
447	{	1933	{
448	#if EV_USE_NANOSLEEP	1934	#if EV_USE_NANOSLEEP
449	struct timespec ts;	1935	struct timespec ts;
450		1936
451	ts.tv_sec = (time_t)delay;	1937	EV_TS_SET (ts, delay);
452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454	nanosleep (&ts, 0);	1938	nanosleep (&ts, 0);
455	#elif defined(_WIN32)	1939	#elif defined _WIN32
		1940	/* maybe this should round up, as ms is very low resolution */
		1941	/* compared to select (µs) or nanosleep (ns) */
456	Sleep ((unsigned long)(delay * 1e3));	1942	Sleep ((unsigned long)(delay * 1e3));
457	#else	1943	#else
458	struct timeval tv;	1944	struct timeval tv;
459		1945
460	tv.tv_sec = (time_t)delay;	1946	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	1947	/* something not guaranteed by newer posix versions, but guaranteed */
462		1948	/* by older ones */
		1949	EV_TV_SET (tv, delay);
463	select (0, 0, 0, 0, &tv);	1950	select (0, 0, 0, 0, &tv);
464	#endif	1951	#endif
465	}	1952	}
466	}	1953	}
467		1954
468	/*****************************************************************************/	1955	/*****************************************************************************/
469		1956
470	int inline_size	1957	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		1958
		1959	/* find a suitable new size for the given array, */
		1960	/* hopefully by rounding to a nice-to-malloc size */
		1961	inline_size int
471	array_nextsize (int elem, int cur, int cnt)	1962	array_nextsize (int elem, int cur, int cnt)
472	{	1963	{
473	int ncur = cur + 1;	1964	int ncur = cur + 1;
474		1965
475	do	1966	do
476	ncur <<= 1;	1967	ncur <<= 1;
477	while (cnt > ncur);	1968	while (cnt > ncur);
478		1969
479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	1970	/* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
480	if (elem * ncur > 4096)	1971	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
481	{	1972	{
482	ncur *= elem;	1973	ncur *= elem;
483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	1974	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
484	ncur = ncur - sizeof (void *) * 4;	1975	ncur = ncur - sizeof (void *) * 4;
485	ncur /= elem;	1976	ncur /= elem;
486	}	1977	}
487		1978
488	return ncur;	1979	return ncur;
489	}	1980	}
490		1981
491	static noinline void *	1982	noinline ecb_cold
		1983	static void *
492	array_realloc (int elem, void *base, int *cur, int cnt)	1984	array_realloc (int elem, void *base, int *cur, int cnt)
493	{	1985	{
494	*cur = array_nextsize (elem, *cur, cnt);	1986	*cur = array_nextsize (elem, *cur, cnt);
495	return ev_realloc (base, elem * *cur);	1987	return ev_realloc (base, elem * *cur);
496	}	1988	}
		1989
		1990	#define array_needsize_noinit(base,count)
		1991
		1992	#define array_needsize_zerofill(base,count) \
		1993	memset ((void *)(base), 0, sizeof (*(base)) * (count))
497		1994
498	#define array_needsize(type,base,cur,cnt,init) \	1995	#define array_needsize(type,base,cur,cnt,init) \
499	if (expect_false ((cnt) > (cur))) \	1996	if (expect_false ((cnt) > (cur))) \
500	{ \	1997	{ \
501	int ocur_ = (cur); \	1998	ecb_unused int ocur_ = (cur); \
502	(base) = (type *)array_realloc \	1999	(base) = (type *)array_realloc \
503	(sizeof (type), (base), &(cur), (cnt)); \	2000	(sizeof (type), (base), &(cur), (cnt)); \
504	init ((base) + (ocur_), (cur) - ocur_); \	2001	init ((base) + (ocur_), (cur) - ocur_); \
505	}	2002	}
506		2003
…		…
513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	2010	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514	}	2011	}
515	#endif	2012	#endif
516		2013
517	#define array_free(stem, idx) \	2014	#define array_free(stem, idx) \
518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	2015	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
519		2016
520	/*****************************************************************************/	2017	/*****************************************************************************/
521		2018
		2019	/* dummy callback for pending events */
522	void noinline	2020	noinline
		2021	static void
		2022	pendingcb (EV_P_ ev_prepare *w, int revents)
		2023	{
		2024	}
		2025
		2026	noinline
		2027	void
523	ev_feed_event (EV_P_ void *w, int revents)	2028	ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
524	{	2029	{
525	W w_ = (W)w;	2030	W w_ = (W)w;
526	int pri = ABSPRI (w_);	2031	int pri = ABSPRI (w_);
527		2032
528	if (expect_false (w_->pending))	2033	if (expect_false (w_->pending))
529	pendings [pri][w_->pending - 1].events |= revents;	2034	pendings [pri][w_->pending - 1].events |= revents;
530	else	2035	else
531	{	2036	{
532	w_->pending = ++pendingcnt [pri];	2037	w_->pending = ++pendingcnt [pri];
533	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);	2038	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
534	pendings [pri][w_->pending - 1].w = w_;	2039	pendings [pri][w_->pending - 1].w = w_;
535	pendings [pri][w_->pending - 1].events = revents;	2040	pendings [pri][w_->pending - 1].events = revents;
536	}	2041	}
537	}
538		2042
539	void inline_speed	2043	pendingpri = NUMPRI - 1;
		2044	}
		2045
		2046	inline_speed void
		2047	feed_reverse (EV_P_ W w)
		2048	{
		2049	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
		2050	rfeeds [rfeedcnt++] = w;
		2051	}
		2052
		2053	inline_size void
		2054	feed_reverse_done (EV_P_ int revents)
		2055	{
		2056	do
		2057	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		2058	while (rfeedcnt);
		2059	}
		2060
		2061	inline_speed void
540	queue_events (EV_P_ W *events, int eventcnt, int type)	2062	queue_events (EV_P_ W *events, int eventcnt, int type)
541	{	2063	{
542	int i;	2064	int i;
543		2065
544	for (i = 0; i < eventcnt; ++i)	2066	for (i = 0; i < eventcnt; ++i)
545	ev_feed_event (EV_A_ events [i], type);	2067	ev_feed_event (EV_A_ events [i], type);
546	}	2068	}
547		2069
548	/*****************************************************************************/	2070	/*****************************************************************************/
549		2071
550	void inline_size	2072	inline_speed void
551	anfds_init (ANFD *base, int count)
552	{
553	while (count--)
554	{
555	base->head = 0;
556	base->events = EV_NONE;
557	base->reify = 0;
558
559	++base;
560	}
561	}
562
563	void inline_speed
564	fd_event (EV_P_ int fd, int revents)	2073	fd_event_nocheck (EV_P_ int fd, int revents)
565	{	2074	{
566	ANFD *anfd = anfds + fd;	2075	ANFD *anfd = anfds + fd;
567	ev_io *w;	2076	ev_io *w;
568		2077
569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	2078	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
573	if (ev)	2082	if (ev)
574	ev_feed_event (EV_A_ (W)w, ev);	2083	ev_feed_event (EV_A_ (W)w, ev);
575	}	2084	}
576	}	2085	}
577		2086
578	void	2087	/* do not submit kernel events for fds that have reify set */
		2088	/* because that means they changed while we were polling for new events */
		2089	inline_speed void
579	ev_feed_fd_event (EV_P_ int fd, int revents)	2090	fd_event (EV_P_ int fd, int revents)
		2091	{
		2092	ANFD *anfd = anfds + fd;
		2093
		2094	if (expect_true (!anfd->reify))
		2095	fd_event_nocheck (EV_A_ fd, revents);
		2096	}
		2097
		2098	void
		2099	ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
580	{	2100	{
581	if (fd >= 0 && fd < anfdmax)	2101	if (fd >= 0 && fd < anfdmax)
582	fd_event (EV_A_ fd, revents);	2102	fd_event_nocheck (EV_A_ fd, revents);
583	}	2103	}
584		2104
585	void inline_size	2105	/* make sure the external fd watch events are in-sync */
		2106	/* with the kernel/libev internal state */
		2107	inline_size void
586	fd_reify (EV_P)	2108	fd_reify (EV_P)
587	{	2109	{
588	int i;	2110	int i;
		2111
		2112	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		2113	for (i = 0; i < fdchangecnt; ++i)
		2114	{
		2115	int fd = fdchanges [i];
		2116	ANFD *anfd = anfds + fd;
		2117
		2118	if (anfd->reify & EV__IOFDSET && anfd->head)
		2119	{
		2120	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		2121
		2122	if (handle != anfd->handle)
		2123	{
		2124	unsigned long arg;
		2125
		2126	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		2127
		2128	/* handle changed, but fd didn't - we need to do it in two steps */
		2129	backend_modify (EV_A_ fd, anfd->events, 0);
		2130	anfd->events = 0;
		2131	anfd->handle = handle;
		2132	}
		2133	}
		2134	}
		2135	#endif
589		2136
590	for (i = 0; i < fdchangecnt; ++i)	2137	for (i = 0; i < fdchangecnt; ++i)
591	{	2138	{
592	int fd = fdchanges [i];	2139	int fd = fdchanges [i];
593	ANFD *anfd = anfds + fd;	2140	ANFD *anfd = anfds + fd;
594	ev_io *w;	2141	ev_io *w;
595		2142
596	unsigned char events = 0;	2143	unsigned char o_events = anfd->events;
		2144	unsigned char o_reify = anfd->reify;
597		2145
598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	2146	anfd->reify = 0;
599	events |= (unsigned char)w->events;
600		2147
601	#if EV_SELECT_IS_WINSOCKET	2148	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
602	if (events)
603	{	2149	{
604	unsigned long argp;	2150	anfd->events = 0;
605	#ifdef EV_FD_TO_WIN32_HANDLE	2151
606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	2152	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
607	#else	2153	anfd->events |= (unsigned char)w->events;
608	anfd->handle = _get_osfhandle (fd);	2154
609	#endif	2155	if (o_events != anfd->events)
610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	2156	o_reify = EV__IOFDSET; /* actually |= */
611	}	2157	}
612	#endif
613		2158
614	{	2159	if (o_reify & EV__IOFDSET)
615	unsigned char o_events = anfd->events;
616	unsigned char o_reify = anfd->reify;
617
618	anfd->reify = 0;
619	anfd->events = events;
620
621	if (o_events != events || o_reify & EV_IOFDSET)
622	backend_modify (EV_A_ fd, o_events, events);	2160	backend_modify (EV_A_ fd, o_events, anfd->events);
623	}
624	}	2161	}
625		2162
626	fdchangecnt = 0;	2163	fdchangecnt = 0;
627	}	2164	}
628		2165
		2166	/* something about the given fd changed */
629	void inline_size	2167	inline_size
		2168	void
630	fd_change (EV_P_ int fd, int flags)	2169	fd_change (EV_P_ int fd, int flags)
631	{	2170	{
632	unsigned char reify = anfds [fd].reify;	2171	unsigned char reify = anfds [fd].reify;
633	anfds [fd].reify |= flags;	2172	anfds [fd].reify |= flags;
634		2173
635	if (expect_true (!reify))	2174	if (expect_true (!reify))
636	{	2175	{
637	++fdchangecnt;	2176	++fdchangecnt;
638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	2177	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
639	fdchanges [fdchangecnt - 1] = fd;	2178	fdchanges [fdchangecnt - 1] = fd;
640	}	2179	}
641	}	2180	}
642		2181
643	void inline_speed	2182	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		2183	inline_speed ecb_cold void
644	fd_kill (EV_P_ int fd)	2184	fd_kill (EV_P_ int fd)
645	{	2185	{
646	ev_io *w;	2186	ev_io *w;
647		2187
648	while ((w = (ev_io *)anfds [fd].head))	2188	while ((w = (ev_io *)anfds [fd].head))
…		…
650	ev_io_stop (EV_A_ w);	2190	ev_io_stop (EV_A_ w);
651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	2191	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652	}	2192	}
653	}	2193	}
654		2194
655	int inline_size	2195	/* check whether the given fd is actually valid, for error recovery */
		2196	inline_size ecb_cold int
656	fd_valid (int fd)	2197	fd_valid (int fd)
657	{	2198	{
658	#ifdef _WIN32	2199	#ifdef _WIN32
659	return _get_osfhandle (fd) != -1;	2200	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
660	#else	2201	#else
661	return fcntl (fd, F_GETFD) != -1;	2202	return fcntl (fd, F_GETFD) != -1;
662	#endif	2203	#endif
663	}	2204	}
664		2205
665	/* called on EBADF to verify fds */	2206	/* called on EBADF to verify fds */
666	static void noinline	2207	noinline ecb_cold
		2208	static void
667	fd_ebadf (EV_P)	2209	fd_ebadf (EV_P)
668	{	2210	{
669	int fd;	2211	int fd;
670		2212
671	for (fd = 0; fd < anfdmax; ++fd)	2213	for (fd = 0; fd < anfdmax; ++fd)
672	if (anfds [fd].events)	2214	if (anfds [fd].events)
673	if (!fd_valid (fd) == -1 && errno == EBADF)	2215	if (!fd_valid (fd) && errno == EBADF)
674	fd_kill (EV_A_ fd);	2216	fd_kill (EV_A_ fd);
675	}	2217	}
676		2218
677	/* called on ENOMEM in select/poll to kill some fds and retry */	2219	/* called on ENOMEM in select/poll to kill some fds and retry */
678	static void noinline	2220	noinline ecb_cold
		2221	static void
679	fd_enomem (EV_P)	2222	fd_enomem (EV_P)
680	{	2223	{
681	int fd;	2224	int fd;
682		2225
683	for (fd = anfdmax; fd--; )	2226	for (fd = anfdmax; fd--; )
684	if (anfds [fd].events)	2227	if (anfds [fd].events)
685	{	2228	{
686	fd_kill (EV_A_ fd);	2229	fd_kill (EV_A_ fd);
687	return;	2230	break;
688	}	2231	}
689	}	2232	}
690		2233
691	/* usually called after fork if backend needs to re-arm all fds from scratch */	2234	/* usually called after fork if backend needs to re-arm all fds from scratch */
692	static void noinline	2235	noinline
		2236	static void
693	fd_rearm_all (EV_P)	2237	fd_rearm_all (EV_P)
694	{	2238	{
695	int fd;	2239	int fd;
696		2240
697	for (fd = 0; fd < anfdmax; ++fd)	2241	for (fd = 0; fd < anfdmax; ++fd)
698	if (anfds [fd].events)	2242	if (anfds [fd].events)
699	{	2243	{
700	anfds [fd].events = 0;	2244	anfds [fd].events = 0;
		2245	anfds [fd].emask = 0;
701	fd_change (EV_A_ fd, EV_IOFDSET | 1);	2246	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
702	}	2247	}
703	}	2248	}
704		2249
705	/*****************************************************************************/	2250	/* used to prepare libev internal fd's */
706		2251	/* this is not fork-safe */
707	void inline_speed	2252	inline_speed void
708	upheap (WT *heap, int k)
709	{
710	WT w = heap [k];
711
712	while (k)
713	{
714	int p = (k - 1) >> 1;
715
716	if (heap [p]->at <= w->at)
717	break;
718
719	heap [k] = heap [p];
720	((W)heap [k])->active = k + 1;
721	k = p;
722	}
723
724	heap [k] = w;
725	((W)heap [k])->active = k + 1;
726	}
727
728	void inline_speed
729	downheap (WT *heap, int N, int k)
730	{
731	WT w = heap [k];
732
733	for (;;)
734	{
735	int c = (k << 1) + 1;
736
737	if (c >= N)
738	break;
739
740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741	? 1 : 0;
742
743	if (w->at <= heap [c]->at)
744	break;
745
746	heap [k] = heap [c];
747	((W)heap [k])->active = k + 1;
748
749	k = c;
750	}
751
752	heap [k] = w;
753	((W)heap [k])->active = k + 1;
754	}
755
756	void inline_size
757	adjustheap (WT *heap, int N, int k)
758	{
759	upheap (heap, k);
760	downheap (heap, N, k);
761	}
762
763	/*****************************************************************************/
764
765	typedef struct
766	{
767	WL head;
768	EV_ATOMIC_T gotsig;
769	} ANSIG;
770
771	static ANSIG *signals;
772	static int signalmax;
773
774	static EV_ATOMIC_T gotsig;
775
776	void inline_size
777	signals_init (ANSIG *base, int count)
778	{
779	while (count--)
780	{
781	base->head = 0;
782	base->gotsig = 0;
783
784	++base;
785	}
786	}
787
788	/*****************************************************************************/
789
790	void inline_speed
791	fd_intern (int fd)	2253	fd_intern (int fd)
792	{	2254	{
793	#ifdef _WIN32	2255	#ifdef _WIN32
794	int arg = 1;	2256	unsigned long arg = 1;
795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	2257	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
796	#else	2258	#else
797	fcntl (fd, F_SETFD, FD_CLOEXEC);	2259	fcntl (fd, F_SETFD, FD_CLOEXEC);
798	fcntl (fd, F_SETFL, O_NONBLOCK);	2260	fcntl (fd, F_SETFL, O_NONBLOCK);
799	#endif	2261	#endif
800	}	2262	}
801		2263
802	static void noinline	2264	/*****************************************************************************/
		2265
		2266	/*
		2267	* the heap functions want a real array index. array index 0 is guaranteed to not
		2268	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		2269	* the branching factor of the d-tree.
		2270	*/
		2271
		2272	/*
		2273	* at the moment we allow libev the luxury of two heaps,
		2274	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		2275	* which is more cache-efficient.
		2276	* the difference is about 5% with 50000+ watchers.
		2277	*/
		2278	#if EV_USE_4HEAP
		2279
		2280	#define DHEAP 4
		2281	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		2282	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		2283	#define UPHEAP_DONE(p,k) ((p) == (k))
		2284
		2285	/* away from the root */
		2286	inline_speed void
		2287	downheap (ANHE *heap, int N, int k)
		2288	{
		2289	ANHE he = heap [k];
		2290	ANHE *E = heap + N + HEAP0;
		2291
		2292	for (;;)
		2293	{
		2294	ev_tstamp minat;
		2295	ANHE *minpos;
		2296	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		2297
		2298	/* find minimum child */
		2299	if (expect_true (pos + DHEAP - 1 < E))
		2300	{
		2301	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		2302	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		2303	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		2304	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		2305	}
		2306	else if (pos < E)
		2307	{
		2308	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		2309	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		2310	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		2311	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		2312	}
		2313	else
		2314	break;
		2315
		2316	if (ANHE_at (he) <= minat)
		2317	break;
		2318
		2319	heap [k] = *minpos;
		2320	ev_active (ANHE_w (*minpos)) = k;
		2321
		2322	k = minpos - heap;
		2323	}
		2324
		2325	heap [k] = he;
		2326	ev_active (ANHE_w (he)) = k;
		2327	}
		2328
		2329	#else /* 4HEAP */
		2330
		2331	#define HEAP0 1
		2332	#define HPARENT(k) ((k) >> 1)
		2333	#define UPHEAP_DONE(p,k) (!(p))
		2334
		2335	/* away from the root */
		2336	inline_speed void
		2337	downheap (ANHE *heap, int N, int k)
		2338	{
		2339	ANHE he = heap [k];
		2340
		2341	for (;;)
		2342	{
		2343	int c = k << 1;
		2344
		2345	if (c >= N + HEAP0)
		2346	break;
		2347
		2348	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		2349	? 1 : 0;
		2350
		2351	if (ANHE_at (he) <= ANHE_at (heap [c]))
		2352	break;
		2353
		2354	heap [k] = heap [c];
		2355	ev_active (ANHE_w (heap [k])) = k;
		2356
		2357	k = c;
		2358	}
		2359
		2360	heap [k] = he;
		2361	ev_active (ANHE_w (he)) = k;
		2362	}
		2363	#endif
		2364
		2365	/* towards the root */
		2366	inline_speed void
		2367	upheap (ANHE *heap, int k)
		2368	{
		2369	ANHE he = heap [k];
		2370
		2371	for (;;)
		2372	{
		2373	int p = HPARENT (k);
		2374
		2375	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		2376	break;
		2377
		2378	heap [k] = heap [p];
		2379	ev_active (ANHE_w (heap [k])) = k;
		2380	k = p;
		2381	}
		2382
		2383	heap [k] = he;
		2384	ev_active (ANHE_w (he)) = k;
		2385	}
		2386
		2387	/* move an element suitably so it is in a correct place */
		2388	inline_size void
		2389	adjustheap (ANHE *heap, int N, int k)
		2390	{
		2391	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
		2392	upheap (heap, k);
		2393	else
		2394	downheap (heap, N, k);
		2395	}
		2396
		2397	/* rebuild the heap: this function is used only once and executed rarely */
		2398	inline_size void
		2399	reheap (ANHE *heap, int N)
		2400	{
		2401	int i;
		2402
		2403	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		2404	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		2405	for (i = 0; i < N; ++i)
		2406	upheap (heap, i + HEAP0);
		2407	}
		2408
		2409	/*****************************************************************************/
		2410
		2411	/* associate signal watchers to a signal signal */
		2412	typedef struct
		2413	{
		2414	EV_ATOMIC_T pending;
		2415	#if EV_MULTIPLICITY
		2416	EV_P;
		2417	#endif
		2418	WL head;
		2419	} ANSIG;
		2420
		2421	static ANSIG signals [EV_NSIG - 1];
		2422
		2423	/*****************************************************************************/
		2424
		2425	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		2426
		2427	noinline ecb_cold
		2428	static void
803	evpipe_init (EV_P)	2429	evpipe_init (EV_P)
804	{	2430	{
805	if (!ev_is_active (&pipeev))	2431	if (!ev_is_active (&pipe_w))
806	{	2432	{
		2433	int fds [2];
		2434
		2435	# if EV_USE_EVENTFD
		2436	fds [0] = -1;
		2437	fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		2438	if (fds [1] < 0 && errno == EINVAL)
		2439	fds [1] = eventfd (0, 0);
		2440
		2441	if (fds [1] < 0)
		2442	# endif
		2443	{
807	while (pipe (evpipe))	2444	while (pipe (fds))
808	syserr ("(libev) error creating signal/async pipe");	2445	ev_syserr ("(libev) error creating signal/async pipe");
809		2446
810	fd_intern (evpipe [0]);	2447	fd_intern (fds [0]);
		2448	}
		2449
		2450	evpipe [0] = fds [0];
		2451
		2452	if (evpipe [1] < 0)
		2453	evpipe [1] = fds [1]; /* first call, set write fd */
		2454	else
		2455	{
		2456	/* on subsequent calls, do not change evpipe [1] */
		2457	/* so that evpipe_write can always rely on its value. */
		2458	/* this branch does not do anything sensible on windows, */
		2459	/* so must not be executed on windows */
		2460
		2461	dup2 (fds [1], evpipe [1]);
		2462	close (fds [1]);
		2463	}
		2464
811	fd_intern (evpipe [1]);	2465	fd_intern (evpipe [1]);
812		2466
813	ev_io_set (&pipeev, evpipe [0], EV_READ);	2467	ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
814	ev_io_start (EV_A_ &pipeev);	2468	ev_io_start (EV_A_ &pipe_w);
815	ev_unref (EV_A); /* watcher should not keep loop alive */	2469	ev_unref (EV_A); /* watcher should not keep loop alive */
816	}	2470	}
817	}	2471	}
818		2472
819	void inline_size	2473	inline_speed void
820	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	2474	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
821	{	2475	{
822	if (!*flag)	2476	ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
		2477
		2478	if (expect_true (*flag))
		2479	return;
		2480
		2481	*flag = 1;
		2482	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		2483
		2484	pipe_write_skipped = 1;
		2485
		2486	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		2487
		2488	if (pipe_write_wanted)
823	{	2489	{
		2490	int old_errno;
		2491
		2492	pipe_write_skipped = 0;
		2493	ECB_MEMORY_FENCE_RELEASE;
		2494
824	int old_errno = errno; /* save errno because write might clobber it */	2495	old_errno = errno; /* save errno because write will clobber it */
825		2496
826	*flag = 1;	2497	#if EV_USE_EVENTFD
827	write (evpipe [1], &old_errno, 1);	2498	if (evpipe [0] < 0)
		2499	{
		2500	uint64_t counter = 1;
		2501	write (evpipe [1], &counter, sizeof (uint64_t));
		2502	}
		2503	else
		2504	#endif
		2505	{
		2506	#ifdef _WIN32
		2507	WSABUF buf;
		2508	DWORD sent;
		2509	buf.buf = (char *)&buf;
		2510	buf.len = 1;
		2511	WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
		2512	#else
		2513	write (evpipe [1], &(evpipe [1]), 1);
		2514	#endif
		2515	}
828		2516
829	errno = old_errno;	2517	errno = old_errno;
830	}	2518	}
831	}	2519	}
832		2520
		2521	/* called whenever the libev signal pipe */
		2522	/* got some events (signal, async) */
833	static void	2523	static void
834	pipecb (EV_P_ ev_io *iow, int revents)	2524	pipecb (EV_P_ ev_io *iow, int revents)
835	{	2525	{
		2526	int i;
		2527
		2528	if (revents & EV_READ)
836	{	2529	{
837	int dummy;	2530	#if EV_USE_EVENTFD
		2531	if (evpipe [0] < 0)
		2532	{
		2533	uint64_t counter;
		2534	read (evpipe [1], &counter, sizeof (uint64_t));
		2535	}
		2536	else
		2537	#endif
		2538	{
		2539	char dummy[4];
		2540	#ifdef _WIN32
		2541	WSABUF buf;
		2542	DWORD recvd;
		2543	DWORD flags = 0;
		2544	buf.buf = dummy;
		2545	buf.len = sizeof (dummy);
		2546	WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
		2547	#else
838	read (evpipe [0], &dummy, 1);	2548	read (evpipe [0], &dummy, sizeof (dummy));
		2549	#endif
		2550	}
839	}	2551	}
840		2552
841	if (gotsig && ev_is_default_loop (EV_A))	2553	pipe_write_skipped = 0;
842	{
843	int signum;
844	gotsig = 0;
845		2554
846	for (signum = signalmax; signum--; )	2555	ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
847	if (signals [signum].gotsig)	2556
		2557	#if EV_SIGNAL_ENABLE
		2558	if (sig_pending)
		2559	{
		2560	sig_pending = 0;
		2561
		2562	ECB_MEMORY_FENCE;
		2563
		2564	for (i = EV_NSIG - 1; i--; )
		2565	if (expect_false (signals [i].pending))
848	ev_feed_signal_event (EV_A_ signum + 1);	2566	ev_feed_signal_event (EV_A_ i + 1);
849	}	2567	}
		2568	#endif
850		2569
851	#if EV_ASYNC_ENABLE	2570	#if EV_ASYNC_ENABLE
852	if (gotasync)	2571	if (async_pending)
853	{	2572	{
854	int i;	2573	async_pending = 0;
855	gotasync = 0;	2574
		2575	ECB_MEMORY_FENCE;
856		2576
857	for (i = asynccnt; i--; )	2577	for (i = asynccnt; i--; )
858	if (asyncs [i]->sent)	2578	if (asyncs [i]->sent)
859	{	2579	{
860	asyncs [i]->sent = 0;	2580	asyncs [i]->sent = 0;
		2581	ECB_MEMORY_FENCE_RELEASE;
861	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);	2582	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
862	}	2583	}
863	}	2584	}
864	#endif	2585	#endif
865	}	2586	}
866		2587
867	/*****************************************************************************/	2588	/*****************************************************************************/
868		2589
		2590	void
		2591	ev_feed_signal (int signum) EV_NOEXCEPT
		2592	{
		2593	#if EV_MULTIPLICITY
		2594	EV_P;
		2595	ECB_MEMORY_FENCE_ACQUIRE;
		2596	EV_A = signals [signum - 1].loop;
		2597
		2598	if (!EV_A)
		2599	return;
		2600	#endif
		2601
		2602	signals [signum - 1].pending = 1;
		2603	evpipe_write (EV_A_ &sig_pending);
		2604	}
		2605
869	static void	2606	static void
870	ev_sighandler (int signum)	2607	ev_sighandler (int signum)
871	{	2608	{
		2609	#ifdef _WIN32
		2610	signal (signum, ev_sighandler);
		2611	#endif
		2612
		2613	ev_feed_signal (signum);
		2614	}
		2615
		2616	noinline
		2617	void
		2618	ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
		2619	{
		2620	WL w;
		2621
		2622	if (expect_false (signum <= 0 || signum >= EV_NSIG))
		2623	return;
		2624
		2625	--signum;
		2626
872	#if EV_MULTIPLICITY	2627	#if EV_MULTIPLICITY
873	struct ev_loop *loop = &default_loop_struct;	2628	/* it is permissible to try to feed a signal to the wrong loop */
874	#endif	2629	/* or, likely more useful, feeding a signal nobody is waiting for */
875		2630
876	#if _WIN32	2631	if (expect_false (signals [signum].loop != EV_A))
877	signal (signum, ev_sighandler);
878	#endif
879
880	signals [signum - 1].gotsig = 1;
881	evpipe_write (EV_A_ &gotsig);
882	}
883
884	void noinline
885	ev_feed_signal_event (EV_P_ int signum)
886	{
887	WL w;
888
889	#if EV_MULTIPLICITY
890	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
891	#endif
892
893	--signum;
894
895	if (signum < 0 || signum >= signalmax)
896	return;	2632	return;
		2633	#endif
897		2634
898	signals [signum].gotsig = 0;	2635	signals [signum].pending = 0;
		2636	ECB_MEMORY_FENCE_RELEASE;
899		2637
900	for (w = signals [signum].head; w; w = w->next)	2638	for (w = signals [signum].head; w; w = w->next)
901	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	2639	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
902	}	2640	}
903		2641
		2642	#if EV_USE_SIGNALFD
		2643	static void
		2644	sigfdcb (EV_P_ ev_io *iow, int revents)
		2645	{
		2646	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		2647
		2648	for (;;)
		2649	{
		2650	ssize_t res = read (sigfd, si, sizeof (si));
		2651
		2652	/* not ISO-C, as res might be -1, but works with SuS */
		2653	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		2654	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		2655
		2656	if (res < (ssize_t)sizeof (si))
		2657	break;
		2658	}
		2659	}
		2660	#endif
		2661
		2662	#endif
		2663
904	/*****************************************************************************/	2664	/*****************************************************************************/
905		2665
		2666	#if EV_CHILD_ENABLE
906	static WL childs [EV_PID_HASHSIZE];	2667	static WL childs [EV_PID_HASHSIZE];
907
908	#ifndef _WIN32
909		2668
910	static ev_signal childev;	2669	static ev_signal childev;
911		2670
912	#ifndef WIFCONTINUED	2671	#ifndef WIFCONTINUED
913	# define WIFCONTINUED(status) 0	2672	# define WIFCONTINUED(status) 0
914	#endif	2673	#endif
915		2674
916	void inline_speed	2675	/* handle a single child status event */
		2676	inline_speed void
917	child_reap (EV_P_ int chain, int pid, int status)	2677	child_reap (EV_P_ int chain, int pid, int status)
918	{	2678	{
919	ev_child *w;	2679	ev_child *w;
920	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	2680	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
921		2681
922	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	2682	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
923	{	2683	{
924	if ((w->pid == pid || !w->pid)	2684	if ((w->pid == pid || !w->pid)
925	&& (!traced || (w->flags & 1)))	2685	&& (!traced || (w->flags & 1)))
926	{	2686	{
927	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */	2687	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
…		…
934		2694
935	#ifndef WCONTINUED	2695	#ifndef WCONTINUED
936	# define WCONTINUED 0	2696	# define WCONTINUED 0
937	#endif	2697	#endif
938		2698
		2699	/* called on sigchld etc., calls waitpid */
939	static void	2700	static void
940	childcb (EV_P_ ev_signal *sw, int revents)	2701	childcb (EV_P_ ev_signal *sw, int revents)
941	{	2702	{
942	int pid, status;	2703	int pid, status;
943		2704
…		…
951	/* make sure we are called again until all children have been reaped */	2712	/* make sure we are called again until all children have been reaped */
952	/* we need to do it this way so that the callback gets called before we continue */	2713	/* we need to do it this way so that the callback gets called before we continue */
953	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	2714	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
954		2715
955	child_reap (EV_A_ pid, pid, status);	2716	child_reap (EV_A_ pid, pid, status);
956	if (EV_PID_HASHSIZE > 1)	2717	if ((EV_PID_HASHSIZE) > 1)
957	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	2718	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
958	}	2719	}
959		2720
960	#endif	2721	#endif
961		2722
962	/*****************************************************************************/	2723	/*****************************************************************************/
963		2724
		2725	#if EV_USE_IOCP
		2726	# include "ev_iocp.c"
		2727	#endif
964	#if EV_USE_PORT	2728	#if EV_USE_PORT
965	# include "ev_port.c"	2729	# include "ev_port.c"
966	#endif	2730	#endif
967	#if EV_USE_KQUEUE	2731	#if EV_USE_KQUEUE
968	# include "ev_kqueue.c"	2732	# include "ev_kqueue.c"
969	#endif	2733	#endif
		2734	#if EV_USE_LINUXAIO
		2735	# include "ev_linuxaio.c"
		2736	#endif
970	#if EV_USE_EPOLL	2737	#if EV_USE_EPOLL
971	# include "ev_epoll.c"	2738	# include "ev_epoll.c"
972	#endif	2739	#endif
973	#if EV_USE_POLL	2740	#if EV_USE_POLL
974	# include "ev_poll.c"	2741	# include "ev_poll.c"
975	#endif	2742	#endif
976	#if EV_USE_SELECT	2743	#if EV_USE_SELECT
977	# include "ev_select.c"	2744	# include "ev_select.c"
978	#endif	2745	#endif
979		2746
980	int	2747	ecb_cold int
981	ev_version_major (void)	2748	ev_version_major (void) EV_NOEXCEPT
982	{	2749	{
983	return EV_VERSION_MAJOR;	2750	return EV_VERSION_MAJOR;
984	}	2751	}
985		2752
986	int	2753	ecb_cold int
987	ev_version_minor (void)	2754	ev_version_minor (void) EV_NOEXCEPT
988	{	2755	{
989	return EV_VERSION_MINOR;	2756	return EV_VERSION_MINOR;
990	}	2757	}
991		2758
992	/* return true if we are running with elevated privileges and should ignore env variables */	2759	/* return true if we are running with elevated privileges and should ignore env variables */
993	int inline_size	2760	inline_size ecb_cold int
994	enable_secure (void)	2761	enable_secure (void)
995	{	2762	{
996	#ifdef _WIN32	2763	#ifdef _WIN32
997	return 0;	2764	return 0;
998	#else	2765	#else
999	return getuid () != geteuid ()	2766	return getuid () != geteuid ()
1000	|| getgid () != getegid ();	2767	|| getgid () != getegid ();
1001	#endif	2768	#endif
1002	}	2769	}
1003		2770
		2771	ecb_cold
1004	unsigned int	2772	unsigned int
1005	ev_supported_backends (void)	2773	ev_supported_backends (void) EV_NOEXCEPT
1006	{	2774	{
1007	unsigned int flags = 0;	2775	unsigned int flags = 0;
1008		2776
1009	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;	2777	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1010	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;	2778	if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1011	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;	2779	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		2780	if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1012	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;	2781	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1013	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;	2782	if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1014		2783
1015	return flags;	2784	return flags;
1016	}	2785	}
1017		2786
		2787	ecb_cold
1018	unsigned int	2788	unsigned int
1019	ev_recommended_backends (void)	2789	ev_recommended_backends (void) EV_NOEXCEPT
1020	{	2790	{
1021	unsigned int flags = ev_supported_backends ();	2791	unsigned int flags = ev_supported_backends ();
1022		2792
1023	#ifndef __NetBSD__	2793	#ifndef __NetBSD__
1024	/* kqueue is borked on everything but netbsd apparently */	2794	/* kqueue is borked on everything but netbsd apparently */
1025	/* it usually doesn't work correctly on anything but sockets and pipes */	2795	/* it usually doesn't work correctly on anything but sockets and pipes */
1026	flags &= ~EVBACKEND_KQUEUE;	2796	flags &= ~EVBACKEND_KQUEUE;
1027	#endif	2797	#endif
1028	#ifdef __APPLE__	2798	#ifdef __APPLE__
1029	// flags &= ~EVBACKEND_KQUEUE; for documentation	2799	/* only select works correctly on that "unix-certified" platform */
		2800	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		2801	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		2802	#endif
		2803	#ifdef __FreeBSD__
		2804	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
		2805	#endif
		2806
		2807	/* TODO: linuxaio is very experimental */
1030	flags &= ~EVBACKEND_POLL;	2808	flags &= ~EVBACKEND_LINUXAIO;
1031	#endif
1032		2809
1033	return flags;	2810	return flags;
1034	}	2811	}
1035		2812
		2813	ecb_cold
1036	unsigned int	2814	unsigned int
1037	ev_embeddable_backends (void)	2815	ev_embeddable_backends (void) EV_NOEXCEPT
1038	{	2816	{
1039	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	2817	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1040		2818
1041	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	2819	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1042	/* please fix it and tell me how to detect the fix */	2820	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1043	flags &= ~EVBACKEND_EPOLL;	2821	flags &= ~EVBACKEND_EPOLL;
1044		2822
1045	return flags;	2823	return flags;
1046	}	2824	}
1047		2825
1048	unsigned int	2826	unsigned int
1049	ev_backend (EV_P)	2827	ev_backend (EV_P) EV_NOEXCEPT
1050	{	2828	{
1051	return backend;	2829	return backend;
1052	}	2830	}
1053		2831
		2832	#if EV_FEATURE_API
1054	unsigned int	2833	unsigned int
1055	ev_loop_count (EV_P)	2834	ev_iteration (EV_P) EV_NOEXCEPT
1056	{	2835	{
1057	return loop_count;	2836	return loop_count;
1058	}	2837	}
1059		2838
		2839	unsigned int
		2840	ev_depth (EV_P) EV_NOEXCEPT
		2841	{
		2842	return loop_depth;
		2843	}
		2844
1060	void	2845	void
1061	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	2846	ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1062	{	2847	{
1063	io_blocktime = interval;	2848	io_blocktime = interval;
1064	}	2849	}
1065		2850
1066	void	2851	void
1067	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	2852	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1068	{	2853	{
1069	timeout_blocktime = interval;	2854	timeout_blocktime = interval;
1070	}	2855	}
1071		2856
1072	static void noinline	2857	void
		2858	ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
		2859	{
		2860	userdata = data;
		2861	}
		2862
		2863	void *
		2864	ev_userdata (EV_P) EV_NOEXCEPT
		2865	{
		2866	return userdata;
		2867	}
		2868
		2869	void
		2870	ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
		2871	{
		2872	invoke_cb = invoke_pending_cb;
		2873	}
		2874
		2875	void
		2876	ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
		2877	{
		2878	release_cb = release;
		2879	acquire_cb = acquire;
		2880	}
		2881	#endif
		2882
		2883	/* initialise a loop structure, must be zero-initialised */
		2884	noinline ecb_cold
		2885	static void
1073	loop_init (EV_P_ unsigned int flags)	2886	loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1074	{	2887	{
1075	if (!backend)	2888	if (!backend)
1076	{	2889	{
		2890	origflags = flags;
		2891
		2892	#if EV_USE_REALTIME
		2893	if (!have_realtime)
		2894	{
		2895	struct timespec ts;
		2896
		2897	if (!clock_gettime (CLOCK_REALTIME, &ts))
		2898	have_realtime = 1;
		2899	}
		2900	#endif
		2901
1077	#if EV_USE_MONOTONIC	2902	#if EV_USE_MONOTONIC
		2903	if (!have_monotonic)
1078	{	2904	{
1079	struct timespec ts;	2905	struct timespec ts;
		2906
1080	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	2907	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1081	have_monotonic = 1;	2908	have_monotonic = 1;
1082	}	2909	}
1083	#endif
1084
1085	ev_rt_now = ev_time ();
1086	mn_now = get_clock ();
1087	now_floor = mn_now;
1088	rtmn_diff = ev_rt_now - mn_now;
1089
1090	io_blocktime = 0.;
1091	timeout_blocktime = 0.;
1092	backend = 0;
1093	backend_fd = -1;
1094	gotasync = 0;
1095	#if EV_USE_INOTIFY
1096	fs_fd = -2;
1097	#endif	2910	#endif
1098		2911
1099	/* pid check not overridable via env */	2912	/* pid check not overridable via env */
1100	#ifndef _WIN32	2913	#ifndef _WIN32
1101	if (flags & EVFLAG_FORKCHECK)	2914	if (flags & EVFLAG_FORKCHECK)
…		…
1105	if (!(flags & EVFLAG_NOENV)	2918	if (!(flags & EVFLAG_NOENV)
1106	&& !enable_secure ()	2919	&& !enable_secure ()
1107	&& getenv ("LIBEV_FLAGS"))	2920	&& getenv ("LIBEV_FLAGS"))
1108	flags = atoi (getenv ("LIBEV_FLAGS"));	2921	flags = atoi (getenv ("LIBEV_FLAGS"));
1109		2922
1110	if (!(flags & 0x0000ffffUL))	2923	ev_rt_now = ev_time ();
		2924	mn_now = get_clock ();
		2925	now_floor = mn_now;
		2926	rtmn_diff = ev_rt_now - mn_now;
		2927	#if EV_FEATURE_API
		2928	invoke_cb = ev_invoke_pending;
		2929	#endif
		2930
		2931	io_blocktime = 0.;
		2932	timeout_blocktime = 0.;
		2933	backend = 0;
		2934	backend_fd = -1;
		2935	sig_pending = 0;
		2936	#if EV_ASYNC_ENABLE
		2937	async_pending = 0;
		2938	#endif
		2939	pipe_write_skipped = 0;
		2940	pipe_write_wanted = 0;
		2941	evpipe [0] = -1;
		2942	evpipe [1] = -1;
		2943	#if EV_USE_INOTIFY
		2944	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
		2945	#endif
		2946	#if EV_USE_SIGNALFD
		2947	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
		2948	#endif
		2949
		2950	if (!(flags & EVBACKEND_MASK))
1111	flags |= ev_recommended_backends ();	2951	flags |= ev_recommended_backends ();
1112		2952
		2953	#if EV_USE_IOCP
		2954	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		2955	#endif
1113	#if EV_USE_PORT	2956	#if EV_USE_PORT
1114	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	2957	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1115	#endif	2958	#endif
1116	#if EV_USE_KQUEUE	2959	#if EV_USE_KQUEUE
1117	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	2960	if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
		2961	#endif
		2962	#if EV_USE_LINUXAIO
		2963	if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1118	#endif	2964	#endif
1119	#if EV_USE_EPOLL	2965	#if EV_USE_EPOLL
1120	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);	2966	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1121	#endif	2967	#endif
1122	#if EV_USE_POLL	2968	#if EV_USE_POLL
1123	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);	2969	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1124	#endif	2970	#endif
1125	#if EV_USE_SELECT	2971	#if EV_USE_SELECT
1126	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	2972	if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1127	#endif	2973	#endif
1128		2974
		2975	ev_prepare_init (&pending_w, pendingcb);
		2976
		2977	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1129	ev_init (&pipeev, pipecb);	2978	ev_init (&pipe_w, pipecb);
1130	ev_set_priority (&pipeev, EV_MAXPRI);	2979	ev_set_priority (&pipe_w, EV_MAXPRI);
		2980	#endif
1131	}	2981	}
1132	}	2982	}
1133		2983
1134	static void noinline	2984	/* free up a loop structure */
		2985	ecb_cold
		2986	void
1135	loop_destroy (EV_P)	2987	ev_loop_destroy (EV_P)
1136	{	2988	{
1137	int i;	2989	int i;
1138		2990
		2991	#if EV_MULTIPLICITY
		2992	/* mimic free (0) */
		2993	if (!EV_A)
		2994	return;
		2995	#endif
		2996
		2997	#if EV_CLEANUP_ENABLE
		2998	/* queue cleanup watchers (and execute them) */
		2999	if (expect_false (cleanupcnt))
		3000	{
		3001	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		3002	EV_INVOKE_PENDING;
		3003	}
		3004	#endif
		3005
		3006	#if EV_CHILD_ENABLE
		3007	if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
		3008	{
		3009	ev_ref (EV_A); /* child watcher */
		3010	ev_signal_stop (EV_A_ &childev);
		3011	}
		3012	#endif
		3013
1139	if (ev_is_active (&pipeev))	3014	if (ev_is_active (&pipe_w))
1140	{	3015	{
1141	ev_ref (EV_A); /* signal watcher */	3016	/*ev_ref (EV_A);*/
1142	ev_io_stop (EV_A_ &pipeev);	3017	/*ev_io_stop (EV_A_ &pipe_w);*/
1143		3018
1144	close (evpipe [0]); evpipe [0] = 0;	3019	if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1145	close (evpipe [1]); evpipe [1] = 0;	3020	if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1146	}	3021	}
		3022
		3023	#if EV_USE_SIGNALFD
		3024	if (ev_is_active (&sigfd_w))
		3025	close (sigfd);
		3026	#endif
1147		3027
1148	#if EV_USE_INOTIFY	3028	#if EV_USE_INOTIFY
1149	if (fs_fd >= 0)	3029	if (fs_fd >= 0)
1150	close (fs_fd);	3030	close (fs_fd);
1151	#endif	3031	#endif
1152		3032
1153	if (backend_fd >= 0)	3033	if (backend_fd >= 0)
1154	close (backend_fd);	3034	close (backend_fd);
1155		3035
		3036	#if EV_USE_IOCP
		3037	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		3038	#endif
1156	#if EV_USE_PORT	3039	#if EV_USE_PORT
1157	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	3040	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1158	#endif	3041	#endif
1159	#if EV_USE_KQUEUE	3042	#if EV_USE_KQUEUE
1160	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	3043	if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
		3044	#endif
		3045	#if EV_USE_LINUXAIO
		3046	if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1161	#endif	3047	#endif
1162	#if EV_USE_EPOLL	3048	#if EV_USE_EPOLL
1163	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);	3049	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1164	#endif	3050	#endif
1165	#if EV_USE_POLL	3051	#if EV_USE_POLL
1166	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);	3052	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1167	#endif	3053	#endif
1168	#if EV_USE_SELECT	3054	#if EV_USE_SELECT
1169	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	3055	if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1170	#endif	3056	#endif
1171		3057
1172	for (i = NUMPRI; i--; )	3058	for (i = NUMPRI; i--; )
1173	{	3059	{
1174	array_free (pending, [i]);	3060	array_free (pending, [i]);
1175	#if EV_IDLE_ENABLE	3061	#if EV_IDLE_ENABLE
1176	array_free (idle, [i]);	3062	array_free (idle, [i]);
1177	#endif	3063	#endif
1178	}	3064	}
1179		3065
1180	ev_free (anfds); anfdmax = 0;	3066	ev_free (anfds); anfds = 0; anfdmax = 0;
1181		3067
1182	/* have to use the microsoft-never-gets-it-right macro */	3068	/* have to use the microsoft-never-gets-it-right macro */
		3069	array_free (rfeed, EMPTY);
1183	array_free (fdchange, EMPTY);	3070	array_free (fdchange, EMPTY);
1184	array_free (timer, EMPTY);	3071	array_free (timer, EMPTY);
1185	#if EV_PERIODIC_ENABLE	3072	#if EV_PERIODIC_ENABLE
1186	array_free (periodic, EMPTY);	3073	array_free (periodic, EMPTY);
1187	#endif	3074	#endif
1188	#if EV_FORK_ENABLE	3075	#if EV_FORK_ENABLE
1189	array_free (fork, EMPTY);	3076	array_free (fork, EMPTY);
1190	#endif	3077	#endif
		3078	#if EV_CLEANUP_ENABLE
		3079	array_free (cleanup, EMPTY);
		3080	#endif
1191	array_free (prepare, EMPTY);	3081	array_free (prepare, EMPTY);
1192	array_free (check, EMPTY);	3082	array_free (check, EMPTY);
1193	#if EV_ASYNC_ENABLE	3083	#if EV_ASYNC_ENABLE
1194	array_free (async, EMPTY);	3084	array_free (async, EMPTY);
1195	#endif	3085	#endif
1196		3086
1197	backend = 0;	3087	backend = 0;
1198	}
1199		3088
		3089	#if EV_MULTIPLICITY
		3090	if (ev_is_default_loop (EV_A))
		3091	#endif
		3092	ev_default_loop_ptr = 0;
		3093	#if EV_MULTIPLICITY
		3094	else
		3095	ev_free (EV_A);
		3096	#endif
		3097	}
		3098
		3099	#if EV_USE_INOTIFY
1200	void inline_size infy_fork (EV_P);	3100	inline_size void infy_fork (EV_P);
		3101	#endif
1201		3102
1202	void inline_size	3103	inline_size void
1203	loop_fork (EV_P)	3104	loop_fork (EV_P)
1204	{	3105	{
1205	#if EV_USE_PORT	3106	#if EV_USE_PORT
1206	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	3107	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1207	#endif	3108	#endif
1208	#if EV_USE_KQUEUE	3109	#if EV_USE_KQUEUE
1209	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	3110	if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
		3111	#endif
		3112	#if EV_USE_LINUXAIO
		3113	if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1210	#endif	3114	#endif
1211	#if EV_USE_EPOLL	3115	#if EV_USE_EPOLL
1212	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	3116	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1213	#endif	3117	#endif
1214	#if EV_USE_INOTIFY	3118	#if EV_USE_INOTIFY
1215	infy_fork (EV_A);	3119	infy_fork (EV_A);
1216	#endif	3120	#endif
1217		3121
1218	if (ev_is_active (&pipeev))	3122	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		3123	if (ev_is_active (&pipe_w) && postfork != 2)
		3124	{
		3125	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
		3126
		3127	ev_ref (EV_A);
		3128	ev_io_stop (EV_A_ &pipe_w);
		3129
		3130	if (evpipe [0] >= 0)
		3131	EV_WIN32_CLOSE_FD (evpipe [0]);
		3132
		3133	evpipe_init (EV_A);
		3134	/* iterate over everything, in case we missed something before */
		3135	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1219	{	3136	}
1220	/* this "locks" the handlers against writing to the pipe */	3137	#endif
1221	/* while we modify the fd vars */	3138
1222	gotsig = 1;	3139	postfork = 0;
		3140	}
		3141
		3142	#if EV_MULTIPLICITY
		3143
		3144	ecb_cold
		3145	struct ev_loop *
		3146	ev_loop_new (unsigned int flags) EV_NOEXCEPT
		3147	{
		3148	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		3149
		3150	memset (EV_A, 0, sizeof (struct ev_loop));
		3151	loop_init (EV_A_ flags);
		3152
		3153	if (ev_backend (EV_A))
		3154	return EV_A;
		3155
		3156	ev_free (EV_A);
		3157	return 0;
		3158	}
		3159
		3160	#endif /* multiplicity */
		3161
		3162	#if EV_VERIFY
		3163	noinline ecb_cold
		3164	static void
		3165	verify_watcher (EV_P_ W w)
		3166	{
		3167	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		3168
		3169	if (w->pending)
		3170	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		3171	}
		3172
		3173	noinline ecb_cold
		3174	static void
		3175	verify_heap (EV_P_ ANHE *heap, int N)
		3176	{
		3177	int i;
		3178
		3179	for (i = HEAP0; i < N + HEAP0; ++i)
		3180	{
		3181	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		3182	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		3183	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		3184
		3185	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		3186	}
		3187	}
		3188
		3189	noinline ecb_cold
		3190	static void
		3191	array_verify (EV_P_ W *ws, int cnt)
		3192	{
		3193	while (cnt--)
		3194	{
		3195	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		3196	verify_watcher (EV_A_ ws [cnt]);
		3197	}
		3198	}
		3199	#endif
		3200
		3201	#if EV_FEATURE_API
		3202	void ecb_cold
		3203	ev_verify (EV_P) EV_NOEXCEPT
		3204	{
		3205	#if EV_VERIFY
		3206	int i;
		3207	WL w, w2;
		3208
		3209	assert (activecnt >= -1);
		3210
		3211	assert (fdchangemax >= fdchangecnt);
		3212	for (i = 0; i < fdchangecnt; ++i)
		3213	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		3214
		3215	assert (anfdmax >= 0);
		3216	for (i = 0; i < anfdmax; ++i)
		3217	{
		3218	int j = 0;
		3219
		3220	for (w = w2 = anfds [i].head; w; w = w->next)
		3221	{
		3222	verify_watcher (EV_A_ (W)w);
		3223
		3224	if (j++ & 1)
		3225	{
		3226	assert (("libev: io watcher list contains a loop", w != w2));
		3227	w2 = w2->next;
		3228	}
		3229
		3230	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
		3231	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		3232	}
		3233	}
		3234
		3235	assert (timermax >= timercnt);
		3236	verify_heap (EV_A_ timers, timercnt);
		3237
		3238	#if EV_PERIODIC_ENABLE
		3239	assert (periodicmax >= periodiccnt);
		3240	verify_heap (EV_A_ periodics, periodiccnt);
		3241	#endif
		3242
		3243	for (i = NUMPRI; i--; )
		3244	{
		3245	assert (pendingmax [i] >= pendingcnt [i]);
		3246	#if EV_IDLE_ENABLE
		3247	assert (idleall >= 0);
		3248	assert (idlemax [i] >= idlecnt [i]);
		3249	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		3250	#endif
		3251	}
		3252
		3253	#if EV_FORK_ENABLE
		3254	assert (forkmax >= forkcnt);
		3255	array_verify (EV_A_ (W *)forks, forkcnt);
		3256	#endif
		3257
		3258	#if EV_CLEANUP_ENABLE
		3259	assert (cleanupmax >= cleanupcnt);
		3260	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		3261	#endif
		3262
1223	#if EV_ASYNC_ENABLE	3263	#if EV_ASYNC_ENABLE
1224	gotasync = 1;	3264	assert (asyncmax >= asynccnt);
		3265	array_verify (EV_A_ (W *)asyncs, asynccnt);
		3266	#endif
		3267
		3268	#if EV_PREPARE_ENABLE
		3269	assert (preparemax >= preparecnt);
		3270	array_verify (EV_A_ (W *)prepares, preparecnt);
		3271	#endif
		3272
		3273	#if EV_CHECK_ENABLE
		3274	assert (checkmax >= checkcnt);
		3275	array_verify (EV_A_ (W *)checks, checkcnt);
		3276	#endif
		3277
		3278	# if 0
		3279	#if EV_CHILD_ENABLE
		3280	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		3281	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		3282	#endif
1225	#endif	3283	# endif
1226		3284	#endif
1227	ev_ref (EV_A);
1228	ev_io_stop (EV_A_ &pipeev);
1229	close (evpipe [0]);
1230	close (evpipe [1]);
1231
1232	evpipe_init (EV_A);
1233	/* now iterate over everything, in case we missed something */
1234	pipecb (EV_A_ &pipeev, EV_READ);
1235	}
1236
1237	postfork = 0;
1238	}	3285	}
		3286	#endif
1239		3287
1240	#if EV_MULTIPLICITY	3288	#if EV_MULTIPLICITY
		3289	ecb_cold
1241	struct ev_loop *	3290	struct ev_loop *
1242	ev_loop_new (unsigned int flags)	3291	#else
1243	{	3292	int
1244	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1245
1246	memset (loop, 0, sizeof (struct ev_loop));
1247
1248	loop_init (EV_A_ flags);
1249
1250	if (ev_backend (EV_A))
1251	return loop;
1252
1253	return 0;
1254	}
1255
1256	void
1257	ev_loop_destroy (EV_P)
1258	{
1259	loop_destroy (EV_A);
1260	ev_free (loop);
1261	}
1262
1263	void
1264	ev_loop_fork (EV_P)
1265	{
1266	postfork = 1; /* must be in line with ev_default_fork */
1267	}
1268
1269	#endif	3293	#endif
1270		3294	ev_default_loop (unsigned int flags) EV_NOEXCEPT
		3295	{
		3296	if (!ev_default_loop_ptr)
		3297	{
1271	#if EV_MULTIPLICITY	3298	#if EV_MULTIPLICITY
1272	struct ev_loop *
1273	ev_default_loop_init (unsigned int flags)
1274	#else
1275	int
1276	ev_default_loop (unsigned int flags)
1277	#endif
1278	{
1279	if (!ev_default_loop_ptr)
1280	{
1281	#if EV_MULTIPLICITY
1282	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	3299	EV_P = ev_default_loop_ptr = &default_loop_struct;
1283	#else	3300	#else
1284	ev_default_loop_ptr = 1;	3301	ev_default_loop_ptr = 1;
1285	#endif	3302	#endif
1286		3303
1287	loop_init (EV_A_ flags);	3304	loop_init (EV_A_ flags);
1288		3305
1289	if (ev_backend (EV_A))	3306	if (ev_backend (EV_A))
1290	{	3307	{
1291	#ifndef _WIN32	3308	#if EV_CHILD_ENABLE
1292	ev_signal_init (&childev, childcb, SIGCHLD);	3309	ev_signal_init (&childev, childcb, SIGCHLD);
1293	ev_set_priority (&childev, EV_MAXPRI);	3310	ev_set_priority (&childev, EV_MAXPRI);
1294	ev_signal_start (EV_A_ &childev);	3311	ev_signal_start (EV_A_ &childev);
1295	ev_unref (EV_A); /* child watcher should not keep loop alive */	3312	ev_unref (EV_A); /* child watcher should not keep loop alive */
1296	#endif	3313	#endif
…		…
1301		3318
1302	return ev_default_loop_ptr;	3319	return ev_default_loop_ptr;
1303	}	3320	}
1304		3321
1305	void	3322	void
1306	ev_default_destroy (void)	3323	ev_loop_fork (EV_P) EV_NOEXCEPT
1307	{	3324	{
1308	#if EV_MULTIPLICITY	3325	postfork = 1;
1309	struct ev_loop *loop = ev_default_loop_ptr;
1310	#endif
1311
1312	#ifndef _WIN32
1313	ev_ref (EV_A); /* child watcher */
1314	ev_signal_stop (EV_A_ &childev);
1315	#endif
1316
1317	loop_destroy (EV_A);
1318	}
1319
1320	void
1321	ev_default_fork (void)
1322	{
1323	#if EV_MULTIPLICITY
1324	struct ev_loop *loop = ev_default_loop_ptr;
1325	#endif
1326
1327	if (backend)
1328	postfork = 1; /* must be in line with ev_loop_fork */
1329	}	3326	}
1330		3327
1331	/*****************************************************************************/	3328	/*****************************************************************************/
1332		3329
1333	void	3330	void
1334	ev_invoke (EV_P_ void *w, int revents)	3331	ev_invoke (EV_P_ void *w, int revents)
1335	{	3332	{
1336	EV_CB_INVOKE ((W)w, revents);	3333	EV_CB_INVOKE ((W)w, revents);
1337	}	3334	}
1338		3335
1339	void inline_speed	3336	unsigned int
1340	call_pending (EV_P)	3337	ev_pending_count (EV_P) EV_NOEXCEPT
1341	{	3338	{
1342	int pri;	3339	int pri;
		3340	unsigned int count = 0;
1343		3341
1344	for (pri = NUMPRI; pri--; )	3342	for (pri = NUMPRI; pri--; )
		3343	count += pendingcnt [pri];
		3344
		3345	return count;
		3346	}
		3347
		3348	noinline
		3349	void
		3350	ev_invoke_pending (EV_P)
		3351	{
		3352	pendingpri = NUMPRI;
		3353
		3354	do
		3355	{
		3356	--pendingpri;
		3357
		3358	/* pendingpri possibly gets modified in the inner loop */
1345	while (pendingcnt [pri])	3359	while (pendingcnt [pendingpri])
1346	{
1347	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1348
1349	if (expect_true (p->w))
1350	{
1351	/*assert (("non-pending watcher on pending list", p->w->pending));*/
1352
1353	p->w->pending = 0;
1354	EV_CB_INVOKE (p->w, p->events);
1355	}
1356	}
1357	}
1358
1359	void inline_size
1360	timers_reify (EV_P)
1361	{
1362	while (timercnt && ((WT)timers [0])->at <= mn_now)
1363	{
1364	ev_timer *w = (ev_timer *)timers [0];
1365
1366	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1367
1368	/* first reschedule or stop timer */
1369	if (w->repeat)
1370	{	3360	{
1371	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	3361	ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1372		3362
1373	((WT)w)->at += w->repeat;	3363	p->w->pending = 0;
1374	if (((WT)w)->at < mn_now)	3364	EV_CB_INVOKE (p->w, p->events);
1375	((WT)w)->at = mn_now;	3365	EV_FREQUENT_CHECK;
1376
1377	downheap (timers, timercnt, 0);
1378	}	3366	}
1379	else
1380	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1381
1382	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1383	}
1384	}
1385
1386	#if EV_PERIODIC_ENABLE
1387	void inline_size
1388	periodics_reify (EV_P)
1389	{
1390	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1391	{	3367	}
1392	ev_periodic *w = (ev_periodic *)periodics [0];	3368	while (pendingpri);
1393
1394	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1395
1396	/* first reschedule or stop timer */
1397	if (w->reschedule_cb)
1398	{
1399	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1400	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1401	downheap (periodics, periodiccnt, 0);
1402	}
1403	else if (w->interval)
1404	{
1405	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1406	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1407	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1408	downheap (periodics, periodiccnt, 0);
1409	}
1410	else
1411	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1412
1413	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1414	}
1415	}	3369	}
1416
1417	static void noinline
1418	periodics_reschedule (EV_P)
1419	{
1420	int i;
1421
1422	/* adjust periodics after time jump */
1423	for (i = 0; i < periodiccnt; ++i)
1424	{
1425	ev_periodic *w = (ev_periodic *)periodics [i];
1426
1427	if (w->reschedule_cb)
1428	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1429	else if (w->interval)
1430	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1431	}
1432
1433	/* now rebuild the heap */
1434	for (i = periodiccnt >> 1; i--; )
1435	downheap (periodics, periodiccnt, i);
1436	}
1437	#endif
1438		3370
1439	#if EV_IDLE_ENABLE	3371	#if EV_IDLE_ENABLE
1440	void inline_size	3372	/* make idle watchers pending. this handles the "call-idle */
		3373	/* only when higher priorities are idle" logic */
		3374	inline_size void
1441	idle_reify (EV_P)	3375	idle_reify (EV_P)
1442	{	3376	{
1443	if (expect_false (idleall))	3377	if (expect_false (idleall))
1444	{	3378	{
1445	int pri;	3379	int pri;
…		…
1457	}	3391	}
1458	}	3392	}
1459	}	3393	}
1460	#endif	3394	#endif
1461		3395
1462	void inline_speed	3396	/* make timers pending */
		3397	inline_size void
		3398	timers_reify (EV_P)
		3399	{
		3400	EV_FREQUENT_CHECK;
		3401
		3402	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		3403	{
		3404	do
		3405	{
		3406	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		3407
		3408	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		3409
		3410	/* first reschedule or stop timer */
		3411	if (w->repeat)
		3412	{
		3413	ev_at (w) += w->repeat;
		3414	if (ev_at (w) < mn_now)
		3415	ev_at (w) = mn_now;
		3416
		3417	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		3418
		3419	ANHE_at_cache (timers [HEAP0]);
		3420	downheap (timers, timercnt, HEAP0);
		3421	}
		3422	else
		3423	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		3424
		3425	EV_FREQUENT_CHECK;
		3426	feed_reverse (EV_A_ (W)w);
		3427	}
		3428	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
		3429
		3430	feed_reverse_done (EV_A_ EV_TIMER);
		3431	}
		3432	}
		3433
		3434	#if EV_PERIODIC_ENABLE
		3435
		3436	noinline
		3437	static void
		3438	periodic_recalc (EV_P_ ev_periodic *w)
		3439	{
		3440	ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
		3441	ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
		3442
		3443	/* the above almost always errs on the low side */
		3444	while (at <= ev_rt_now)
		3445	{
		3446	ev_tstamp nat = at + w->interval;
		3447
		3448	/* when resolution fails us, we use ev_rt_now */
		3449	if (expect_false (nat == at))
		3450	{
		3451	at = ev_rt_now;
		3452	break;
		3453	}
		3454
		3455	at = nat;
		3456	}
		3457
		3458	ev_at (w) = at;
		3459	}
		3460
		3461	/* make periodics pending */
		3462	inline_size void
		3463	periodics_reify (EV_P)
		3464	{
		3465	EV_FREQUENT_CHECK;
		3466
		3467	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		3468	{
		3469	do
		3470	{
		3471	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		3472
		3473	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		3474
		3475	/* first reschedule or stop timer */
		3476	if (w->reschedule_cb)
		3477	{
		3478	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		3479
		3480	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		3481
		3482	ANHE_at_cache (periodics [HEAP0]);
		3483	downheap (periodics, periodiccnt, HEAP0);
		3484	}
		3485	else if (w->interval)
		3486	{
		3487	periodic_recalc (EV_A_ w);
		3488	ANHE_at_cache (periodics [HEAP0]);
		3489	downheap (periodics, periodiccnt, HEAP0);
		3490	}
		3491	else
		3492	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		3493
		3494	EV_FREQUENT_CHECK;
		3495	feed_reverse (EV_A_ (W)w);
		3496	}
		3497	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		3498
		3499	feed_reverse_done (EV_A_ EV_PERIODIC);
		3500	}
		3501	}
		3502
		3503	/* simply recalculate all periodics */
		3504	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		3505	noinline ecb_cold
		3506	static void
		3507	periodics_reschedule (EV_P)
		3508	{
		3509	int i;
		3510
		3511	/* adjust periodics after time jump */
		3512	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		3513	{
		3514	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		3515
		3516	if (w->reschedule_cb)
		3517	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		3518	else if (w->interval)
		3519	periodic_recalc (EV_A_ w);
		3520
		3521	ANHE_at_cache (periodics [i]);
		3522	}
		3523
		3524	reheap (periodics, periodiccnt);
		3525	}
		3526	#endif
		3527
		3528	/* adjust all timers by a given offset */
		3529	noinline ecb_cold
		3530	static void
		3531	timers_reschedule (EV_P_ ev_tstamp adjust)
		3532	{
		3533	int i;
		3534
		3535	for (i = 0; i < timercnt; ++i)
		3536	{
		3537	ANHE *he = timers + i + HEAP0;
		3538	ANHE_w (*he)->at += adjust;
		3539	ANHE_at_cache (*he);
		3540	}
		3541	}
		3542
		3543	/* fetch new monotonic and realtime times from the kernel */
		3544	/* also detect if there was a timejump, and act accordingly */
		3545	inline_speed void
1463	time_update (EV_P_ ev_tstamp max_block)	3546	time_update (EV_P_ ev_tstamp max_block)
1464	{	3547	{
1465	int i;
1466
1467	#if EV_USE_MONOTONIC	3548	#if EV_USE_MONOTONIC
1468	if (expect_true (have_monotonic))	3549	if (expect_true (have_monotonic))
1469	{	3550	{
		3551	int i;
1470	ev_tstamp odiff = rtmn_diff;	3552	ev_tstamp odiff = rtmn_diff;
1471		3553
1472	mn_now = get_clock ();	3554	mn_now = get_clock ();
1473		3555
1474	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	3556	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1490	* doesn't hurt either as we only do this on time-jumps or	3572	* doesn't hurt either as we only do this on time-jumps or
1491	* in the unlikely event of having been preempted here.	3573	* in the unlikely event of having been preempted here.
1492	*/	3574	*/
1493	for (i = 4; --i; )	3575	for (i = 4; --i; )
1494	{	3576	{
		3577	ev_tstamp diff;
1495	rtmn_diff = ev_rt_now - mn_now;	3578	rtmn_diff = ev_rt_now - mn_now;
1496		3579
1497	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	3580	diff = odiff - rtmn_diff;
		3581
		3582	if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1498	return; /* all is well */	3583	return; /* all is well */
1499		3584
1500	ev_rt_now = ev_time ();	3585	ev_rt_now = ev_time ();
1501	mn_now = get_clock ();	3586	mn_now = get_clock ();
1502	now_floor = mn_now;	3587	now_floor = mn_now;
1503	}	3588	}
1504		3589
		3590	/* no timer adjustment, as the monotonic clock doesn't jump */
		3591	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1505	# if EV_PERIODIC_ENABLE	3592	# if EV_PERIODIC_ENABLE
1506	periodics_reschedule (EV_A);	3593	periodics_reschedule (EV_A);
1507	# endif	3594	# endif
1508	/* no timer adjustment, as the monotonic clock doesn't jump */
1509	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1510	}	3595	}
1511	else	3596	else
1512	#endif	3597	#endif
1513	{	3598	{
1514	ev_rt_now = ev_time ();	3599	ev_rt_now = ev_time ();
1515		3600
1516	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	3601	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1517	{	3602	{
		3603	/* adjust timers. this is easy, as the offset is the same for all of them */
		3604	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1518	#if EV_PERIODIC_ENABLE	3605	#if EV_PERIODIC_ENABLE
1519	periodics_reschedule (EV_A);	3606	periodics_reschedule (EV_A);
1520	#endif	3607	#endif
1521	/* adjust timers. this is easy, as the offset is the same for all of them */
1522	for (i = 0; i < timercnt; ++i)
1523	((WT)timers [i])->at += ev_rt_now - mn_now;
1524	}	3608	}
1525		3609
1526	mn_now = ev_rt_now;	3610	mn_now = ev_rt_now;
1527	}	3611	}
1528	}	3612	}
1529		3613
1530	void	3614	int
1531	ev_ref (EV_P)
1532	{
1533	++activecnt;
1534	}
1535
1536	void
1537	ev_unref (EV_P)
1538	{
1539	--activecnt;
1540	}
1541
1542	static int loop_done;
1543
1544	void
1545	ev_loop (EV_P_ int flags)	3615	ev_run (EV_P_ int flags)
1546	{	3616	{
		3617	#if EV_FEATURE_API
		3618	++loop_depth;
		3619	#endif
		3620
		3621	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
		3622
1547	loop_done = EVUNLOOP_CANCEL;	3623	loop_done = EVBREAK_CANCEL;
1548		3624
1549	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	3625	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1550		3626
1551	do	3627	do
1552	{	3628	{
		3629	#if EV_VERIFY >= 2
		3630	ev_verify (EV_A);
		3631	#endif
		3632
1553	#ifndef _WIN32	3633	#ifndef _WIN32
1554	if (expect_false (curpid)) /* penalise the forking check even more */	3634	if (expect_false (curpid)) /* penalise the forking check even more */
1555	if (expect_false (getpid () != curpid))	3635	if (expect_false (getpid () != curpid))
1556	{	3636	{
1557	curpid = getpid ();	3637	curpid = getpid ();
…		…
1563	/* we might have forked, so queue fork handlers */	3643	/* we might have forked, so queue fork handlers */
1564	if (expect_false (postfork))	3644	if (expect_false (postfork))
1565	if (forkcnt)	3645	if (forkcnt)
1566	{	3646	{
1567	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	3647	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1568	call_pending (EV_A);	3648	EV_INVOKE_PENDING;
1569	}	3649	}
1570	#endif	3650	#endif
1571		3651
		3652	#if EV_PREPARE_ENABLE
1572	/* queue prepare watchers (and execute them) */	3653	/* queue prepare watchers (and execute them) */
1573	if (expect_false (preparecnt))	3654	if (expect_false (preparecnt))
1574	{	3655	{
1575	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	3656	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1576	call_pending (EV_A);	3657	EV_INVOKE_PENDING;
1577	}	3658	}
		3659	#endif
1578		3660
1579	if (expect_false (!activecnt))	3661	if (expect_false (loop_done))
1580	break;	3662	break;
1581		3663
1582	/* we might have forked, so reify kernel state if necessary */	3664	/* we might have forked, so reify kernel state if necessary */
1583	if (expect_false (postfork))	3665	if (expect_false (postfork))
1584	loop_fork (EV_A);	3666	loop_fork (EV_A);
…		…
1589	/* calculate blocking time */	3671	/* calculate blocking time */
1590	{	3672	{
1591	ev_tstamp waittime = 0.;	3673	ev_tstamp waittime = 0.;
1592	ev_tstamp sleeptime = 0.;	3674	ev_tstamp sleeptime = 0.;
1593		3675
		3676	/* remember old timestamp for io_blocktime calculation */
		3677	ev_tstamp prev_mn_now = mn_now;
		3678
		3679	/* update time to cancel out callback processing overhead */
		3680	time_update (EV_A_ 1e100);
		3681
		3682	/* from now on, we want a pipe-wake-up */
		3683	pipe_write_wanted = 1;
		3684
		3685	ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
		3686
1594	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	3687	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1595	{	3688	{
1596	/* update time to cancel out callback processing overhead */
1597	time_update (EV_A_ 1e100);
1598
1599	waittime = MAX_BLOCKTIME;	3689	waittime = MAX_BLOCKTIME;
1600		3690
1601	if (timercnt)	3691	if (timercnt)
1602	{	3692	{
1603	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	3693	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1604	if (waittime > to) waittime = to;	3694	if (waittime > to) waittime = to;
1605	}	3695	}
1606		3696
1607	#if EV_PERIODIC_ENABLE	3697	#if EV_PERIODIC_ENABLE
1608	if (periodiccnt)	3698	if (periodiccnt)
1609	{	3699	{
1610	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	3700	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1611	if (waittime > to) waittime = to;	3701	if (waittime > to) waittime = to;
1612	}	3702	}
1613	#endif	3703	#endif
1614		3704
		3705	/* don't let timeouts decrease the waittime below timeout_blocktime */
1615	if (expect_false (waittime < timeout_blocktime))	3706	if (expect_false (waittime < timeout_blocktime))
1616	waittime = timeout_blocktime;	3707	waittime = timeout_blocktime;
1617		3708
1618	sleeptime = waittime - backend_fudge;	3709	/* at this point, we NEED to wait, so we have to ensure */
		3710	/* to pass a minimum nonzero value to the backend */
		3711	if (expect_false (waittime < backend_mintime))
		3712	waittime = backend_mintime;
1619		3713
		3714	/* extra check because io_blocktime is commonly 0 */
1620	if (expect_true (sleeptime > io_blocktime))	3715	if (expect_false (io_blocktime))
1621	sleeptime = io_blocktime;
1622
1623	if (sleeptime)
1624	{	3716	{
		3717	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		3718
		3719	if (sleeptime > waittime - backend_mintime)
		3720	sleeptime = waittime - backend_mintime;
		3721
		3722	if (expect_true (sleeptime > 0.))
		3723	{
1625	ev_sleep (sleeptime);	3724	ev_sleep (sleeptime);
1626	waittime -= sleeptime;	3725	waittime -= sleeptime;
		3726	}
1627	}	3727	}
1628	}	3728	}
1629		3729
		3730	#if EV_FEATURE_API
1630	++loop_count;	3731	++loop_count;
		3732	#endif
		3733	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1631	backend_poll (EV_A_ waittime);	3734	backend_poll (EV_A_ waittime);
		3735	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		3736
		3737	pipe_write_wanted = 0; /* just an optimisation, no fence needed */
		3738
		3739	ECB_MEMORY_FENCE_ACQUIRE;
		3740	if (pipe_write_skipped)
		3741	{
		3742	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		3743	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		3744	}
		3745
1632		3746
1633	/* update ev_rt_now, do magic */	3747	/* update ev_rt_now, do magic */
1634	time_update (EV_A_ waittime + sleeptime);	3748	time_update (EV_A_ waittime + sleeptime);
1635	}	3749	}
1636		3750
…		…
1643	#if EV_IDLE_ENABLE	3757	#if EV_IDLE_ENABLE
1644	/* queue idle watchers unless other events are pending */	3758	/* queue idle watchers unless other events are pending */
1645	idle_reify (EV_A);	3759	idle_reify (EV_A);
1646	#endif	3760	#endif
1647		3761
		3762	#if EV_CHECK_ENABLE
1648	/* queue check watchers, to be executed first */	3763	/* queue check watchers, to be executed first */
1649	if (expect_false (checkcnt))	3764	if (expect_false (checkcnt))
1650	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	3765	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		3766	#endif
1651		3767
1652	call_pending (EV_A);	3768	EV_INVOKE_PENDING;
1653	}	3769	}
1654	while (expect_true (	3770	while (expect_true (
1655	activecnt	3771	activecnt
1656	&& !loop_done	3772	&& !loop_done
1657	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	3773	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1658	));	3774	));
1659		3775
1660	if (loop_done == EVUNLOOP_ONE)	3776	if (loop_done == EVBREAK_ONE)
1661	loop_done = EVUNLOOP_CANCEL;	3777	loop_done = EVBREAK_CANCEL;
1662	}
1663		3778
		3779	#if EV_FEATURE_API
		3780	--loop_depth;
		3781	#endif
		3782
		3783	return activecnt;
		3784	}
		3785
1664	void	3786	void
1665	ev_unloop (EV_P_ int how)	3787	ev_break (EV_P_ int how) EV_NOEXCEPT
1666	{	3788	{
1667	loop_done = how;	3789	loop_done = how;
1668	}	3790	}
1669		3791
		3792	void
		3793	ev_ref (EV_P) EV_NOEXCEPT
		3794	{
		3795	++activecnt;
		3796	}
		3797
		3798	void
		3799	ev_unref (EV_P) EV_NOEXCEPT
		3800	{
		3801	--activecnt;
		3802	}
		3803
		3804	void
		3805	ev_now_update (EV_P) EV_NOEXCEPT
		3806	{
		3807	time_update (EV_A_ 1e100);
		3808	}
		3809
		3810	void
		3811	ev_suspend (EV_P) EV_NOEXCEPT
		3812	{
		3813	ev_now_update (EV_A);
		3814	}
		3815
		3816	void
		3817	ev_resume (EV_P) EV_NOEXCEPT
		3818	{
		3819	ev_tstamp mn_prev = mn_now;
		3820
		3821	ev_now_update (EV_A);
		3822	timers_reschedule (EV_A_ mn_now - mn_prev);
		3823	#if EV_PERIODIC_ENABLE
		3824	/* TODO: really do this? */
		3825	periodics_reschedule (EV_A);
		3826	#endif
		3827	}
		3828
1670	/*****************************************************************************/	3829	/*****************************************************************************/
		3830	/* singly-linked list management, used when the expected list length is short */
1671		3831
1672	void inline_size	3832	inline_size void
1673	wlist_add (WL *head, WL elem)	3833	wlist_add (WL *head, WL elem)
1674	{	3834	{
1675	elem->next = *head;	3835	elem->next = *head;
1676	*head = elem;	3836	*head = elem;
1677	}	3837	}
1678		3838
1679	void inline_size	3839	inline_size void
1680	wlist_del (WL *head, WL elem)	3840	wlist_del (WL *head, WL elem)
1681	{	3841	{
1682	while (*head)	3842	while (*head)
1683	{	3843	{
1684	if (*head == elem)	3844	if (expect_true (*head == elem))
1685	{	3845	{
1686	*head = elem->next;	3846	*head = elem->next;
1687	return;	3847	break;
1688	}	3848	}
1689		3849
1690	head = &(*head)->next;	3850	head = &(*head)->next;
1691	}	3851	}
1692	}	3852	}
1693		3853
1694	void inline_speed	3854	/* internal, faster, version of ev_clear_pending */
		3855	inline_speed void
1695	clear_pending (EV_P_ W w)	3856	clear_pending (EV_P_ W w)
1696	{	3857	{
1697	if (w->pending)	3858	if (w->pending)
1698	{	3859	{
1699	pendings [ABSPRI (w)][w->pending - 1].w = 0;	3860	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1700	w->pending = 0;	3861	w->pending = 0;
1701	}	3862	}
1702	}	3863	}
1703		3864
1704	int	3865	int
1705	ev_clear_pending (EV_P_ void *w)	3866	ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
1706	{	3867	{
1707	W w_ = (W)w;	3868	W w_ = (W)w;
1708	int pending = w_->pending;	3869	int pending = w_->pending;
1709		3870
1710	if (expect_true (pending))	3871	if (expect_true (pending))
1711	{	3872	{
1712	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	3873	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		3874	p->w = (W)&pending_w;
1713	w_->pending = 0;	3875	w_->pending = 0;
1714	p->w = 0;
1715	return p->events;	3876	return p->events;
1716	}	3877	}
1717	else	3878	else
1718	return 0;	3879	return 0;
1719	}	3880	}
1720		3881
1721	void inline_size	3882	inline_size void
1722	pri_adjust (EV_P_ W w)	3883	pri_adjust (EV_P_ W w)
1723	{	3884	{
1724	int pri = w->priority;	3885	int pri = ev_priority (w);
1725	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	3886	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1726	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	3887	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1727	w->priority = pri;	3888	ev_set_priority (w, pri);
1728	}	3889	}
1729		3890
1730	void inline_speed	3891	inline_speed void
1731	ev_start (EV_P_ W w, int active)	3892	ev_start (EV_P_ W w, int active)
1732	{	3893	{
1733	pri_adjust (EV_A_ w);	3894	pri_adjust (EV_A_ w);
1734	w->active = active;	3895	w->active = active;
1735	ev_ref (EV_A);	3896	ev_ref (EV_A);
1736	}	3897	}
1737		3898
1738	void inline_size	3899	inline_size void
1739	ev_stop (EV_P_ W w)	3900	ev_stop (EV_P_ W w)
1740	{	3901	{
1741	ev_unref (EV_A);	3902	ev_unref (EV_A);
1742	w->active = 0;	3903	w->active = 0;
1743	}	3904	}
1744		3905
1745	/*****************************************************************************/	3906	/*****************************************************************************/
1746		3907
1747	void noinline	3908	noinline
		3909	void
1748	ev_io_start (EV_P_ ev_io *w)	3910	ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
1749	{	3911	{
1750	int fd = w->fd;	3912	int fd = w->fd;
1751		3913
1752	if (expect_false (ev_is_active (w)))	3914	if (expect_false (ev_is_active (w)))
1753	return;	3915	return;
1754		3916
1755	assert (("ev_io_start called with negative fd", fd >= 0));	3917	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		3918	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		3919
		3920	EV_FREQUENT_CHECK;
1756		3921
1757	ev_start (EV_A_ (W)w, 1);	3922	ev_start (EV_A_ (W)w, 1);
1758	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	3923	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
1759	wlist_add (&anfds[fd].head, (WL)w);	3924	wlist_add (&anfds[fd].head, (WL)w);
1760		3925
		3926	/* common bug, apparently */
		3927	assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
		3928
1761	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	3929	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1762	w->events &= ~EV_IOFDSET;	3930	w->events &= ~EV__IOFDSET;
1763	}
1764		3931
		3932	EV_FREQUENT_CHECK;
		3933	}
		3934
1765	void noinline	3935	noinline
		3936	void
1766	ev_io_stop (EV_P_ ev_io *w)	3937	ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
1767	{	3938	{
1768	clear_pending (EV_A_ (W)w);	3939	clear_pending (EV_A_ (W)w);
1769	if (expect_false (!ev_is_active (w)))	3940	if (expect_false (!ev_is_active (w)))
1770	return;	3941	return;
1771		3942
1772	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	3943	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		3944
		3945	EV_FREQUENT_CHECK;
1773		3946
1774	wlist_del (&anfds[w->fd].head, (WL)w);	3947	wlist_del (&anfds[w->fd].head, (WL)w);
1775	ev_stop (EV_A_ (W)w);	3948	ev_stop (EV_A_ (W)w);
1776		3949
1777	fd_change (EV_A_ w->fd, 1);	3950	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1778	}
1779		3951
		3952	EV_FREQUENT_CHECK;
		3953	}
		3954
1780	void noinline	3955	noinline
		3956	void
1781	ev_timer_start (EV_P_ ev_timer *w)	3957	ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
1782	{	3958	{
1783	if (expect_false (ev_is_active (w)))	3959	if (expect_false (ev_is_active (w)))
1784	return;	3960	return;
1785		3961
1786	((WT)w)->at += mn_now;	3962	ev_at (w) += mn_now;
1787		3963
1788	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	3964	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1789		3965
		3966	EV_FREQUENT_CHECK;
		3967
		3968	++timercnt;
1790	ev_start (EV_A_ (W)w, ++timercnt);	3969	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1791	array_needsize (WT, timers, timermax, timercnt, EMPTY2);	3970	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
1792	timers [timercnt - 1] = (WT)w;	3971	ANHE_w (timers [ev_active (w)]) = (WT)w;
1793	upheap (timers, timercnt - 1);	3972	ANHE_at_cache (timers [ev_active (w)]);
		3973	upheap (timers, ev_active (w));
1794		3974
		3975	EV_FREQUENT_CHECK;
		3976
1795	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	3977	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1796	}	3978	}
1797		3979
1798	void noinline	3980	noinline
		3981	void
1799	ev_timer_stop (EV_P_ ev_timer *w)	3982	ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
1800	{	3983	{
1801	clear_pending (EV_A_ (W)w);	3984	clear_pending (EV_A_ (W)w);
1802	if (expect_false (!ev_is_active (w)))	3985	if (expect_false (!ev_is_active (w)))
1803	return;	3986	return;
1804		3987
1805	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));	3988	EV_FREQUENT_CHECK;
1806		3989
1807	{	3990	{
1808	int active = ((W)w)->active;	3991	int active = ev_active (w);
1809		3992
		3993	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		3994
		3995	--timercnt;
		3996
1810	if (expect_true (--active < --timercnt))	3997	if (expect_true (active < timercnt + HEAP0))
1811	{	3998	{
1812	timers [active] = timers [timercnt];	3999	timers [active] = timers [timercnt + HEAP0];
1813	adjustheap (timers, timercnt, active);	4000	adjustheap (timers, timercnt, active);
1814	}	4001	}
1815	}	4002	}
1816		4003
1817	((WT)w)->at -= mn_now;	4004	ev_at (w) -= mn_now;
1818		4005
1819	ev_stop (EV_A_ (W)w);	4006	ev_stop (EV_A_ (W)w);
1820	}
1821		4007
		4008	EV_FREQUENT_CHECK;
		4009	}
		4010
1822	void noinline	4011	noinline
		4012	void
1823	ev_timer_again (EV_P_ ev_timer *w)	4013	ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
1824	{	4014	{
		4015	EV_FREQUENT_CHECK;
		4016
		4017	clear_pending (EV_A_ (W)w);
		4018
1825	if (ev_is_active (w))	4019	if (ev_is_active (w))
1826	{	4020	{
1827	if (w->repeat)	4021	if (w->repeat)
1828	{	4022	{
1829	((WT)w)->at = mn_now + w->repeat;	4023	ev_at (w) = mn_now + w->repeat;
		4024	ANHE_at_cache (timers [ev_active (w)]);
1830	adjustheap (timers, timercnt, ((W)w)->active - 1);	4025	adjustheap (timers, timercnt, ev_active (w));
1831	}	4026	}
1832	else	4027	else
1833	ev_timer_stop (EV_A_ w);	4028	ev_timer_stop (EV_A_ w);
1834	}	4029	}
1835	else if (w->repeat)	4030	else if (w->repeat)
1836	{	4031	{
1837	w->at = w->repeat;	4032	ev_at (w) = w->repeat;
1838	ev_timer_start (EV_A_ w);	4033	ev_timer_start (EV_A_ w);
1839	}	4034	}
		4035
		4036	EV_FREQUENT_CHECK;
		4037	}
		4038
		4039	ev_tstamp
		4040	ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
		4041	{
		4042	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1840	}	4043	}
1841		4044
1842	#if EV_PERIODIC_ENABLE	4045	#if EV_PERIODIC_ENABLE
1843	void noinline	4046	noinline
		4047	void
1844	ev_periodic_start (EV_P_ ev_periodic *w)	4048	ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
1845	{	4049	{
1846	if (expect_false (ev_is_active (w)))	4050	if (expect_false (ev_is_active (w)))
1847	return;	4051	return;
1848		4052
1849	if (w->reschedule_cb)	4053	if (w->reschedule_cb)
1850	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	4054	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1851	else if (w->interval)	4055	else if (w->interval)
1852	{	4056	{
1853	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	4057	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1854	/* this formula differs from the one in periodic_reify because we do not always round up */	4058	periodic_recalc (EV_A_ w);
1855	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1856	}	4059	}
1857	else	4060	else
1858	((WT)w)->at = w->offset;	4061	ev_at (w) = w->offset;
1859		4062
		4063	EV_FREQUENT_CHECK;
		4064
		4065	++periodiccnt;
1860	ev_start (EV_A_ (W)w, ++periodiccnt);	4066	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1861	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);	4067	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
1862	periodics [periodiccnt - 1] = (WT)w;	4068	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1863	upheap (periodics, periodiccnt - 1);	4069	ANHE_at_cache (periodics [ev_active (w)]);
		4070	upheap (periodics, ev_active (w));
1864		4071
		4072	EV_FREQUENT_CHECK;
		4073
1865	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	4074	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1866	}	4075	}
1867		4076
1868	void noinline	4077	noinline
		4078	void
1869	ev_periodic_stop (EV_P_ ev_periodic *w)	4079	ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
1870	{	4080	{
1871	clear_pending (EV_A_ (W)w);	4081	clear_pending (EV_A_ (W)w);
1872	if (expect_false (!ev_is_active (w)))	4082	if (expect_false (!ev_is_active (w)))
1873	return;	4083	return;
1874		4084
1875	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));	4085	EV_FREQUENT_CHECK;
1876		4086
1877	{	4087	{
1878	int active = ((W)w)->active;	4088	int active = ev_active (w);
1879		4089
		4090	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		4091
		4092	--periodiccnt;
		4093
1880	if (expect_true (--active < --periodiccnt))	4094	if (expect_true (active < periodiccnt + HEAP0))
1881	{	4095	{
1882	periodics [active] = periodics [periodiccnt];	4096	periodics [active] = periodics [periodiccnt + HEAP0];
1883	adjustheap (periodics, periodiccnt, active);	4097	adjustheap (periodics, periodiccnt, active);
1884	}	4098	}
1885	}	4099	}
1886		4100
1887	ev_stop (EV_A_ (W)w);	4101	ev_stop (EV_A_ (W)w);
1888	}
1889		4102
		4103	EV_FREQUENT_CHECK;
		4104	}
		4105
1890	void noinline	4106	noinline
		4107	void
1891	ev_periodic_again (EV_P_ ev_periodic *w)	4108	ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
1892	{	4109	{
1893	/* TODO: use adjustheap and recalculation */	4110	/* TODO: use adjustheap and recalculation */
1894	ev_periodic_stop (EV_A_ w);	4111	ev_periodic_stop (EV_A_ w);
1895	ev_periodic_start (EV_A_ w);	4112	ev_periodic_start (EV_A_ w);
1896	}	4113	}
…		…
1898		4115
1899	#ifndef SA_RESTART	4116	#ifndef SA_RESTART
1900	# define SA_RESTART 0	4117	# define SA_RESTART 0
1901	#endif	4118	#endif
1902		4119
		4120	#if EV_SIGNAL_ENABLE
		4121
1903	void noinline	4122	noinline
		4123	void
1904	ev_signal_start (EV_P_ ev_signal *w)	4124	ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
1905	{	4125	{
1906	#if EV_MULTIPLICITY
1907	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1908	#endif
1909	if (expect_false (ev_is_active (w)))	4126	if (expect_false (ev_is_active (w)))
1910	return;	4127	return;
1911		4128
1912	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	4129	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1913		4130
1914	evpipe_init (EV_A);	4131	#if EV_MULTIPLICITY
		4132	assert (("libev: a signal must not be attached to two different loops",
		4133	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
1915		4134
		4135	signals [w->signum - 1].loop = EV_A;
		4136	ECB_MEMORY_FENCE_RELEASE;
		4137	#endif
		4138
		4139	EV_FREQUENT_CHECK;
		4140
		4141	#if EV_USE_SIGNALFD
		4142	if (sigfd == -2)
1916	{	4143	{
1917	#ifndef _WIN32	4144	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1918	sigset_t full, prev;	4145	if (sigfd < 0 && errno == EINVAL)
1919	sigfillset (&full);	4146	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1920	sigprocmask (SIG_SETMASK, &full, &prev);
1921	#endif
1922		4147
1923	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	4148	if (sigfd >= 0)
		4149	{
		4150	fd_intern (sigfd); /* doing it twice will not hurt */
1924		4151
1925	#ifndef _WIN32	4152	sigemptyset (&sigfd_set);
1926	sigprocmask (SIG_SETMASK, &prev, 0);	4153
1927	#endif	4154	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		4155	ev_set_priority (&sigfd_w, EV_MAXPRI);
		4156	ev_io_start (EV_A_ &sigfd_w);
		4157	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		4158	}
1928	}	4159	}
		4160
		4161	if (sigfd >= 0)
		4162	{
		4163	/* TODO: check .head */
		4164	sigaddset (&sigfd_set, w->signum);
		4165	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		4166
		4167	signalfd (sigfd, &sigfd_set, 0);
		4168	}
		4169	#endif
1929		4170
1930	ev_start (EV_A_ (W)w, 1);	4171	ev_start (EV_A_ (W)w, 1);
1931	wlist_add (&signals [w->signum - 1].head, (WL)w);	4172	wlist_add (&signals [w->signum - 1].head, (WL)w);
1932		4173
1933	if (!((WL)w)->next)	4174	if (!((WL)w)->next)
		4175	# if EV_USE_SIGNALFD
		4176	if (sigfd < 0) /*TODO*/
		4177	# endif
1934	{	4178	{
1935	#if _WIN32	4179	# ifdef _WIN32
		4180	evpipe_init (EV_A);
		4181
1936	signal (w->signum, ev_sighandler);	4182	signal (w->signum, ev_sighandler);
1937	#else	4183	# else
1938	struct sigaction sa;	4184	struct sigaction sa;
		4185
		4186	evpipe_init (EV_A);
		4187
1939	sa.sa_handler = ev_sighandler;	4188	sa.sa_handler = ev_sighandler;
1940	sigfillset (&sa.sa_mask);	4189	sigfillset (&sa.sa_mask);
1941	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	4190	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1942	sigaction (w->signum, &sa, 0);	4191	sigaction (w->signum, &sa, 0);
		4192
		4193	if (origflags & EVFLAG_NOSIGMASK)
		4194	{
		4195	sigemptyset (&sa.sa_mask);
		4196	sigaddset (&sa.sa_mask, w->signum);
		4197	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		4198	}
1943	#endif	4199	#endif
1944	}	4200	}
1945	}
1946		4201
		4202	EV_FREQUENT_CHECK;
		4203	}
		4204
1947	void noinline	4205	noinline
		4206	void
1948	ev_signal_stop (EV_P_ ev_signal *w)	4207	ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
1949	{	4208	{
1950	clear_pending (EV_A_ (W)w);	4209	clear_pending (EV_A_ (W)w);
1951	if (expect_false (!ev_is_active (w)))	4210	if (expect_false (!ev_is_active (w)))
1952	return;	4211	return;
1953		4212
		4213	EV_FREQUENT_CHECK;
		4214
1954	wlist_del (&signals [w->signum - 1].head, (WL)w);	4215	wlist_del (&signals [w->signum - 1].head, (WL)w);
1955	ev_stop (EV_A_ (W)w);	4216	ev_stop (EV_A_ (W)w);
1956		4217
1957	if (!signals [w->signum - 1].head)	4218	if (!signals [w->signum - 1].head)
1958	signal (w->signum, SIG_DFL);	4219	{
1959	}
1960
1961	void
1962	ev_child_start (EV_P_ ev_child *w)
1963	{
1964	#if EV_MULTIPLICITY	4220	#if EV_MULTIPLICITY
		4221	signals [w->signum - 1].loop = 0; /* unattach from signal */
		4222	#endif
		4223	#if EV_USE_SIGNALFD
		4224	if (sigfd >= 0)
		4225	{
		4226	sigset_t ss;
		4227
		4228	sigemptyset (&ss);
		4229	sigaddset (&ss, w->signum);
		4230	sigdelset (&sigfd_set, w->signum);
		4231
		4232	signalfd (sigfd, &sigfd_set, 0);
		4233	sigprocmask (SIG_UNBLOCK, &ss, 0);
		4234	}
		4235	else
		4236	#endif
		4237	signal (w->signum, SIG_DFL);
		4238	}
		4239
		4240	EV_FREQUENT_CHECK;
		4241	}
		4242
		4243	#endif
		4244
		4245	#if EV_CHILD_ENABLE
		4246
		4247	void
		4248	ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
		4249	{
		4250	#if EV_MULTIPLICITY
1965	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	4251	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1966	#endif	4252	#endif
1967	if (expect_false (ev_is_active (w)))	4253	if (expect_false (ev_is_active (w)))
1968	return;	4254	return;
1969		4255
		4256	EV_FREQUENT_CHECK;
		4257
1970	ev_start (EV_A_ (W)w, 1);	4258	ev_start (EV_A_ (W)w, 1);
1971	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	4259	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1972	}
1973		4260
		4261	EV_FREQUENT_CHECK;
		4262	}
		4263
1974	void	4264	void
1975	ev_child_stop (EV_P_ ev_child *w)	4265	ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
1976	{	4266	{
1977	clear_pending (EV_A_ (W)w);	4267	clear_pending (EV_A_ (W)w);
1978	if (expect_false (!ev_is_active (w)))	4268	if (expect_false (!ev_is_active (w)))
1979	return;	4269	return;
1980		4270
		4271	EV_FREQUENT_CHECK;
		4272
1981	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	4273	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1982	ev_stop (EV_A_ (W)w);	4274	ev_stop (EV_A_ (W)w);
		4275
		4276	EV_FREQUENT_CHECK;
1983	}	4277	}
		4278
		4279	#endif
1984		4280
1985	#if EV_STAT_ENABLE	4281	#if EV_STAT_ENABLE
1986		4282
1987	# ifdef _WIN32	4283	# ifdef _WIN32
1988	# undef lstat	4284	# undef lstat
1989	# define lstat(a,b) _stati64 (a,b)	4285	# define lstat(a,b) _stati64 (a,b)
1990	# endif	4286	# endif
1991		4287
1992	#define DEF_STAT_INTERVAL 5.0074891	4288	#define DEF_STAT_INTERVAL 5.0074891
		4289	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1993	#define MIN_STAT_INTERVAL 0.1074891	4290	#define MIN_STAT_INTERVAL 0.1074891
1994		4291
1995	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	4292	noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1996		4293
1997	#if EV_USE_INOTIFY	4294	#if EV_USE_INOTIFY
1998	# define EV_INOTIFY_BUFSIZE 8192
1999		4295
2000	static void noinline	4296	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		4297	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
		4298
		4299	noinline
		4300	static void
2001	infy_add (EV_P_ ev_stat *w)	4301	infy_add (EV_P_ ev_stat *w)
2002	{	4302	{
2003	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);	4303	w->wd = inotify_add_watch (fs_fd, w->path,
		4304	IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
		4305	| IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
		4306	| IN_DONT_FOLLOW | IN_MASK_ADD);
2004		4307
2005	if (w->wd < 0)	4308	if (w->wd >= 0)
		4309	{
		4310	struct statfs sfs;
		4311
		4312	/* now local changes will be tracked by inotify, but remote changes won't */
		4313	/* unless the filesystem is known to be local, we therefore still poll */
		4314	/* also do poll on <2.6.25, but with normal frequency */
		4315
		4316	if (!fs_2625)
		4317	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		4318	else if (!statfs (w->path, &sfs)
		4319	&& (sfs.f_type == 0x1373 /* devfs */
		4320	|| sfs.f_type == 0x4006 /* fat */
		4321	|| sfs.f_type == 0x4d44 /* msdos */
		4322	|| sfs.f_type == 0xEF53 /* ext2/3 */
		4323	|| sfs.f_type == 0x72b6 /* jffs2 */
		4324	|| sfs.f_type == 0x858458f6 /* ramfs */
		4325	|| sfs.f_type == 0x5346544e /* ntfs */
		4326	|| sfs.f_type == 0x3153464a /* jfs */
		4327	|| sfs.f_type == 0x9123683e /* btrfs */
		4328	|| sfs.f_type == 0x52654973 /* reiser3 */
		4329	|| sfs.f_type == 0x01021994 /* tmpfs */
		4330	|| sfs.f_type == 0x58465342 /* xfs */))
		4331	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		4332	else
		4333	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2006	{	4334	}
2007	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	4335	else
		4336	{
		4337	/* can't use inotify, continue to stat */
		4338	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2008		4339
2009	/* monitor some parent directory for speedup hints */	4340	/* if path is not there, monitor some parent directory for speedup hints */
		4341	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		4342	/* but an efficiency issue only */
2010	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	4343	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2011	{	4344	{
2012	char path [4096];	4345	char path [4096];
2013	strcpy (path, w->path);	4346	strcpy (path, w->path);
2014		4347
…		…
2017	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	4350	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2018	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	4351	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2019		4352
2020	char *pend = strrchr (path, '/');	4353	char *pend = strrchr (path, '/');
2021		4354
2022	if (!pend)	4355	if (!pend || pend == path)
2023	break; /* whoops, no '/', complain to your admin */	4356	break;
2024		4357
2025	*pend = 0;	4358	*pend = 0;
2026	w->wd = inotify_add_watch (fs_fd, path, mask);	4359	w->wd = inotify_add_watch (fs_fd, path, mask);
2027	}	4360	}
2028	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	4361	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2029	}	4362	}
2030	}	4363	}
2031	else
2032	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2033		4364
2034	if (w->wd >= 0)	4365	if (w->wd >= 0)
2035	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	4366	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2036	}
2037		4367
2038	static void noinline	4368	/* now re-arm timer, if required */
		4369	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		4370	ev_timer_again (EV_A_ &w->timer);
		4371	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		4372	}
		4373
		4374	noinline
		4375	static void
2039	infy_del (EV_P_ ev_stat *w)	4376	infy_del (EV_P_ ev_stat *w)
2040	{	4377	{
2041	int slot;	4378	int slot;
2042	int wd = w->wd;	4379	int wd = w->wd;
2043		4380
2044	if (wd < 0)	4381	if (wd < 0)
2045	return;	4382	return;
2046		4383
2047	w->wd = -2;	4384	w->wd = -2;
2048	slot = wd & (EV_INOTIFY_HASHSIZE - 1);	4385	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2049	wlist_del (&fs_hash [slot].head, (WL)w);	4386	wlist_del (&fs_hash [slot].head, (WL)w);
2050		4387
2051	/* remove this watcher, if others are watching it, they will rearm */	4388	/* remove this watcher, if others are watching it, they will rearm */
2052	inotify_rm_watch (fs_fd, wd);	4389	inotify_rm_watch (fs_fd, wd);
2053	}	4390	}
2054		4391
2055	static void noinline	4392	noinline
		4393	static void
2056	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	4394	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2057	{	4395	{
2058	if (slot < 0)	4396	if (slot < 0)
2059	/* overflow, need to check for all hahs slots */	4397	/* overflow, need to check for all hash slots */
2060	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	4398	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2061	infy_wd (EV_A_ slot, wd, ev);	4399	infy_wd (EV_A_ slot, wd, ev);
2062	else	4400	else
2063	{	4401	{
2064	WL w_;	4402	WL w_;
2065		4403
2066	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )	4404	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2067	{	4405	{
2068	ev_stat *w = (ev_stat *)w_;	4406	ev_stat *w = (ev_stat *)w_;
2069	w_ = w_->next; /* lets us remove this watcher and all before it */	4407	w_ = w_->next; /* lets us remove this watcher and all before it */
2070		4408
2071	if (w->wd == wd || wd == -1)	4409	if (w->wd == wd || wd == -1)
2072	{	4410	{
2073	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	4411	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2074	{	4412	{
		4413	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2075	w->wd = -1;	4414	w->wd = -1;
2076	infy_add (EV_A_ w); /* re-add, no matter what */	4415	infy_add (EV_A_ w); /* re-add, no matter what */
2077	}	4416	}
2078		4417
2079	stat_timer_cb (EV_A_ &w->timer, 0);	4418	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2084		4423
2085	static void	4424	static void
2086	infy_cb (EV_P_ ev_io *w, int revents)	4425	infy_cb (EV_P_ ev_io *w, int revents)
2087	{	4426	{
2088	char buf [EV_INOTIFY_BUFSIZE];	4427	char buf [EV_INOTIFY_BUFSIZE];
2089	struct inotify_event *ev = (struct inotify_event *)buf;
2090	int ofs;	4428	int ofs;
2091	int len = read (fs_fd, buf, sizeof (buf));	4429	int len = read (fs_fd, buf, sizeof (buf));
2092		4430
2093	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	4431	for (ofs = 0; ofs < len; )
		4432	{
		4433	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2094	infy_wd (EV_A_ ev->wd, ev->wd, ev);	4434	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		4435	ofs += sizeof (struct inotify_event) + ev->len;
		4436	}
2095	}	4437	}
2096		4438
2097	void inline_size	4439	inline_size ecb_cold
		4440	void
		4441	ev_check_2625 (EV_P)
		4442	{
		4443	/* kernels < 2.6.25 are borked
		4444	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		4445	*/
		4446	if (ev_linux_version () < 0x020619)
		4447	return;
		4448
		4449	fs_2625 = 1;
		4450	}
		4451
		4452	inline_size int
		4453	infy_newfd (void)
		4454	{
		4455	#if defined IN_CLOEXEC && defined IN_NONBLOCK
		4456	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		4457	if (fd >= 0)
		4458	return fd;
		4459	#endif
		4460	return inotify_init ();
		4461	}
		4462
		4463	inline_size void
2098	infy_init (EV_P)	4464	infy_init (EV_P)
2099	{	4465	{
2100	if (fs_fd != -2)	4466	if (fs_fd != -2)
2101	return;	4467	return;
2102		4468
		4469	fs_fd = -1;
		4470
		4471	ev_check_2625 (EV_A);
		4472
2103	fs_fd = inotify_init ();	4473	fs_fd = infy_newfd ();
2104		4474
2105	if (fs_fd >= 0)	4475	if (fs_fd >= 0)
2106	{	4476	{
		4477	fd_intern (fs_fd);
2107	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	4478	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2108	ev_set_priority (&fs_w, EV_MAXPRI);	4479	ev_set_priority (&fs_w, EV_MAXPRI);
2109	ev_io_start (EV_A_ &fs_w);	4480	ev_io_start (EV_A_ &fs_w);
		4481	ev_unref (EV_A);
2110	}	4482	}
2111	}	4483	}
2112		4484
2113	void inline_size	4485	inline_size void
2114	infy_fork (EV_P)	4486	infy_fork (EV_P)
2115	{	4487	{
2116	int slot;	4488	int slot;
2117		4489
2118	if (fs_fd < 0)	4490	if (fs_fd < 0)
2119	return;	4491	return;
2120		4492
		4493	ev_ref (EV_A);
		4494	ev_io_stop (EV_A_ &fs_w);
2121	close (fs_fd);	4495	close (fs_fd);
2122	fs_fd = inotify_init ();	4496	fs_fd = infy_newfd ();
2123		4497
		4498	if (fs_fd >= 0)
		4499	{
		4500	fd_intern (fs_fd);
		4501	ev_io_set (&fs_w, fs_fd, EV_READ);
		4502	ev_io_start (EV_A_ &fs_w);
		4503	ev_unref (EV_A);
		4504	}
		4505
2124	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	4506	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2125	{	4507	{
2126	WL w_ = fs_hash [slot].head;	4508	WL w_ = fs_hash [slot].head;
2127	fs_hash [slot].head = 0;	4509	fs_hash [slot].head = 0;
2128		4510
2129	while (w_)	4511	while (w_)
…		…
2134	w->wd = -1;	4516	w->wd = -1;
2135		4517
2136	if (fs_fd >= 0)	4518	if (fs_fd >= 0)
2137	infy_add (EV_A_ w); /* re-add, no matter what */	4519	infy_add (EV_A_ w); /* re-add, no matter what */
2138	else	4520	else
		4521	{
		4522	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		4523	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2139	ev_timer_start (EV_A_ &w->timer);	4524	ev_timer_again (EV_A_ &w->timer);
		4525	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		4526	}
2140	}	4527	}
2141
2142	}	4528	}
2143	}	4529	}
2144		4530
2145	#endif	4531	#endif
2146		4532
		4533	#ifdef _WIN32
		4534	# define EV_LSTAT(p,b) _stati64 (p, b)
		4535	#else
		4536	# define EV_LSTAT(p,b) lstat (p, b)
		4537	#endif
		4538
2147	void	4539	void
2148	ev_stat_stat (EV_P_ ev_stat *w)	4540	ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2149	{	4541	{
2150	if (lstat (w->path, &w->attr) < 0)	4542	if (lstat (w->path, &w->attr) < 0)
2151	w->attr.st_nlink = 0;	4543	w->attr.st_nlink = 0;
2152	else if (!w->attr.st_nlink)	4544	else if (!w->attr.st_nlink)
2153	w->attr.st_nlink = 1;	4545	w->attr.st_nlink = 1;
2154	}	4546	}
2155		4547
2156	static void noinline	4548	noinline
		4549	static void
2157	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	4550	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2158	{	4551	{
2159	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	4552	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2160		4553
2161	/* we copy this here each the time so that */	4554	ev_statdata prev = w->attr;
2162	/* prev has the old value when the callback gets invoked */
2163	w->prev = w->attr;
2164	ev_stat_stat (EV_A_ w);	4555	ev_stat_stat (EV_A_ w);
2165		4556
2166	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	4557	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2167	if (	4558	if (
2168	w->prev.st_dev != w->attr.st_dev	4559	prev.st_dev != w->attr.st_dev
2169	|| w->prev.st_ino != w->attr.st_ino	4560	|| prev.st_ino != w->attr.st_ino
2170	|| w->prev.st_mode != w->attr.st_mode	4561	|| prev.st_mode != w->attr.st_mode
2171	|| w->prev.st_nlink != w->attr.st_nlink	4562	|| prev.st_nlink != w->attr.st_nlink
2172	|| w->prev.st_uid != w->attr.st_uid	4563	|| prev.st_uid != w->attr.st_uid
2173	|| w->prev.st_gid != w->attr.st_gid	4564	|| prev.st_gid != w->attr.st_gid
2174	|| w->prev.st_rdev != w->attr.st_rdev	4565	|| prev.st_rdev != w->attr.st_rdev
2175	|| w->prev.st_size != w->attr.st_size	4566	|| prev.st_size != w->attr.st_size
2176	|| w->prev.st_atime != w->attr.st_atime	4567	|| prev.st_atime != w->attr.st_atime
2177	|| w->prev.st_mtime != w->attr.st_mtime	4568	|| prev.st_mtime != w->attr.st_mtime
2178	|| w->prev.st_ctime != w->attr.st_ctime	4569	|| prev.st_ctime != w->attr.st_ctime
2179	) {	4570	) {
		4571	/* we only update w->prev on actual differences */
		4572	/* in case we test more often than invoke the callback, */
		4573	/* to ensure that prev is always different to attr */
		4574	w->prev = prev;
		4575
2180	#if EV_USE_INOTIFY	4576	#if EV_USE_INOTIFY
		4577	if (fs_fd >= 0)
		4578	{
2181	infy_del (EV_A_ w);	4579	infy_del (EV_A_ w);
2182	infy_add (EV_A_ w);	4580	infy_add (EV_A_ w);
2183	ev_stat_stat (EV_A_ w); /* avoid race... */	4581	ev_stat_stat (EV_A_ w); /* avoid race... */
		4582	}
2184	#endif	4583	#endif
2185		4584
2186	ev_feed_event (EV_A_ w, EV_STAT);	4585	ev_feed_event (EV_A_ w, EV_STAT);
2187	}	4586	}
2188	}	4587	}
2189		4588
2190	void	4589	void
2191	ev_stat_start (EV_P_ ev_stat *w)	4590	ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2192	{	4591	{
2193	if (expect_false (ev_is_active (w)))	4592	if (expect_false (ev_is_active (w)))
2194	return;	4593	return;
2195		4594
2196	/* since we use memcmp, we need to clear any padding data etc. */
2197	memset (&w->prev, 0, sizeof (ev_statdata));
2198	memset (&w->attr, 0, sizeof (ev_statdata));
2199
2200	ev_stat_stat (EV_A_ w);	4595	ev_stat_stat (EV_A_ w);
2201		4596
		4597	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2202	if (w->interval < MIN_STAT_INTERVAL)	4598	w->interval = MIN_STAT_INTERVAL;
2203	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2204		4599
2205	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	4600	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2206	ev_set_priority (&w->timer, ev_priority (w));	4601	ev_set_priority (&w->timer, ev_priority (w));
2207		4602
2208	#if EV_USE_INOTIFY	4603	#if EV_USE_INOTIFY
2209	infy_init (EV_A);	4604	infy_init (EV_A);
2210		4605
2211	if (fs_fd >= 0)	4606	if (fs_fd >= 0)
2212	infy_add (EV_A_ w);	4607	infy_add (EV_A_ w);
2213	else	4608	else
2214	#endif	4609	#endif
		4610	{
2215	ev_timer_start (EV_A_ &w->timer);	4611	ev_timer_again (EV_A_ &w->timer);
		4612	ev_unref (EV_A);
		4613	}
2216		4614
2217	ev_start (EV_A_ (W)w, 1);	4615	ev_start (EV_A_ (W)w, 1);
2218	}
2219		4616
		4617	EV_FREQUENT_CHECK;
		4618	}
		4619
2220	void	4620	void
2221	ev_stat_stop (EV_P_ ev_stat *w)	4621	ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2222	{	4622	{
2223	clear_pending (EV_A_ (W)w);	4623	clear_pending (EV_A_ (W)w);
2224	if (expect_false (!ev_is_active (w)))	4624	if (expect_false (!ev_is_active (w)))
2225	return;	4625	return;
2226		4626
		4627	EV_FREQUENT_CHECK;
		4628
2227	#if EV_USE_INOTIFY	4629	#if EV_USE_INOTIFY
2228	infy_del (EV_A_ w);	4630	infy_del (EV_A_ w);
2229	#endif	4631	#endif
		4632
		4633	if (ev_is_active (&w->timer))
		4634	{
		4635	ev_ref (EV_A);
2230	ev_timer_stop (EV_A_ &w->timer);	4636	ev_timer_stop (EV_A_ &w->timer);
		4637	}
2231		4638
2232	ev_stop (EV_A_ (W)w);	4639	ev_stop (EV_A_ (W)w);
		4640
		4641	EV_FREQUENT_CHECK;
2233	}	4642	}
2234	#endif	4643	#endif
2235		4644
2236	#if EV_IDLE_ENABLE	4645	#if EV_IDLE_ENABLE
2237	void	4646	void
2238	ev_idle_start (EV_P_ ev_idle *w)	4647	ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2239	{	4648	{
2240	if (expect_false (ev_is_active (w)))	4649	if (expect_false (ev_is_active (w)))
2241	return;	4650	return;
2242		4651
2243	pri_adjust (EV_A_ (W)w);	4652	pri_adjust (EV_A_ (W)w);
2244		4653
		4654	EV_FREQUENT_CHECK;
		4655
2245	{	4656	{
2246	int active = ++idlecnt [ABSPRI (w)];	4657	int active = ++idlecnt [ABSPRI (w)];
2247		4658
2248	++idleall;	4659	++idleall;
2249	ev_start (EV_A_ (W)w, active);	4660	ev_start (EV_A_ (W)w, active);
2250		4661
2251	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);	4662	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2252	idles [ABSPRI (w)][active - 1] = w;	4663	idles [ABSPRI (w)][active - 1] = w;
2253	}	4664	}
2254	}
2255		4665
		4666	EV_FREQUENT_CHECK;
		4667	}
		4668
2256	void	4669	void
2257	ev_idle_stop (EV_P_ ev_idle *w)	4670	ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2258	{	4671	{
2259	clear_pending (EV_A_ (W)w);	4672	clear_pending (EV_A_ (W)w);
2260	if (expect_false (!ev_is_active (w)))	4673	if (expect_false (!ev_is_active (w)))
2261	return;	4674	return;
2262		4675
		4676	EV_FREQUENT_CHECK;
		4677
2263	{	4678	{
2264	int active = ((W)w)->active;	4679	int active = ev_active (w);
2265		4680
2266	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	4681	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2267	((W)idles [ABSPRI (w)][active - 1])->active = active;	4682	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2268		4683
2269	ev_stop (EV_A_ (W)w);	4684	ev_stop (EV_A_ (W)w);
2270	--idleall;	4685	--idleall;
2271	}	4686	}
2272	}
2273	#endif
2274		4687
		4688	EV_FREQUENT_CHECK;
		4689	}
		4690	#endif
		4691
		4692	#if EV_PREPARE_ENABLE
2275	void	4693	void
2276	ev_prepare_start (EV_P_ ev_prepare *w)	4694	ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2277	{	4695	{
2278	if (expect_false (ev_is_active (w)))	4696	if (expect_false (ev_is_active (w)))
2279	return;	4697	return;
2280		4698
		4699	EV_FREQUENT_CHECK;
		4700
2281	ev_start (EV_A_ (W)w, ++preparecnt);	4701	ev_start (EV_A_ (W)w, ++preparecnt);
2282	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);	4702	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2283	prepares [preparecnt - 1] = w;	4703	prepares [preparecnt - 1] = w;
2284	}
2285		4704
		4705	EV_FREQUENT_CHECK;
		4706	}
		4707
2286	void	4708	void
2287	ev_prepare_stop (EV_P_ ev_prepare *w)	4709	ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2288	{	4710	{
2289	clear_pending (EV_A_ (W)w);	4711	clear_pending (EV_A_ (W)w);
2290	if (expect_false (!ev_is_active (w)))	4712	if (expect_false (!ev_is_active (w)))
2291	return;	4713	return;
2292		4714
		4715	EV_FREQUENT_CHECK;
		4716
2293	{	4717	{
2294	int active = ((W)w)->active;	4718	int active = ev_active (w);
		4719
2295	prepares [active - 1] = prepares [--preparecnt];	4720	prepares [active - 1] = prepares [--preparecnt];
2296	((W)prepares [active - 1])->active = active;	4721	ev_active (prepares [active - 1]) = active;
2297	}	4722	}
2298		4723
2299	ev_stop (EV_A_ (W)w);	4724	ev_stop (EV_A_ (W)w);
2300	}
2301		4725
		4726	EV_FREQUENT_CHECK;
		4727	}
		4728	#endif
		4729
		4730	#if EV_CHECK_ENABLE
2302	void	4731	void
2303	ev_check_start (EV_P_ ev_check *w)	4732	ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2304	{	4733	{
2305	if (expect_false (ev_is_active (w)))	4734	if (expect_false (ev_is_active (w)))
2306	return;	4735	return;
2307		4736
		4737	EV_FREQUENT_CHECK;
		4738
2308	ev_start (EV_A_ (W)w, ++checkcnt);	4739	ev_start (EV_A_ (W)w, ++checkcnt);
2309	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);	4740	array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2310	checks [checkcnt - 1] = w;	4741	checks [checkcnt - 1] = w;
2311	}
2312		4742
		4743	EV_FREQUENT_CHECK;
		4744	}
		4745
2313	void	4746	void
2314	ev_check_stop (EV_P_ ev_check *w)	4747	ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2315	{	4748	{
2316	clear_pending (EV_A_ (W)w);	4749	clear_pending (EV_A_ (W)w);
2317	if (expect_false (!ev_is_active (w)))	4750	if (expect_false (!ev_is_active (w)))
2318	return;	4751	return;
2319		4752
		4753	EV_FREQUENT_CHECK;
		4754
2320	{	4755	{
2321	int active = ((W)w)->active;	4756	int active = ev_active (w);
		4757
2322	checks [active - 1] = checks [--checkcnt];	4758	checks [active - 1] = checks [--checkcnt];
2323	((W)checks [active - 1])->active = active;	4759	ev_active (checks [active - 1]) = active;
2324	}	4760	}
2325		4761
2326	ev_stop (EV_A_ (W)w);	4762	ev_stop (EV_A_ (W)w);
		4763
		4764	EV_FREQUENT_CHECK;
2327	}	4765	}
		4766	#endif
2328		4767
2329	#if EV_EMBED_ENABLE	4768	#if EV_EMBED_ENABLE
2330	void noinline	4769	noinline
		4770	void
2331	ev_embed_sweep (EV_P_ ev_embed *w)	4771	ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2332	{	4772	{
2333	ev_loop (w->other, EVLOOP_NONBLOCK);	4773	ev_run (w->other, EVRUN_NOWAIT);
2334	}	4774	}
2335		4775
2336	static void	4776	static void
2337	embed_io_cb (EV_P_ ev_io *io, int revents)	4777	embed_io_cb (EV_P_ ev_io *io, int revents)
2338	{	4778	{
2339	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	4779	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2340		4780
2341	if (ev_cb (w))	4781	if (ev_cb (w))
2342	ev_feed_event (EV_A_ (W)w, EV_EMBED);	4782	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2343	else	4783	else
2344	ev_loop (w->other, EVLOOP_NONBLOCK);	4784	ev_run (w->other, EVRUN_NOWAIT);
2345	}	4785	}
2346		4786
2347	static void	4787	static void
2348	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	4788	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2349	{	4789	{
2350	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	4790	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2351		4791
2352	{	4792	{
2353	struct ev_loop *loop = w->other;	4793	EV_P = w->other;
2354		4794
2355	while (fdchangecnt)	4795	while (fdchangecnt)
2356	{	4796	{
2357	fd_reify (EV_A);	4797	fd_reify (EV_A);
2358	ev_loop (EV_A_ EVLOOP_NONBLOCK);	4798	ev_run (EV_A_ EVRUN_NOWAIT);
2359	}	4799	}
2360	}	4800	}
		4801	}
		4802
		4803	static void
		4804	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		4805	{
		4806	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		4807
		4808	ev_embed_stop (EV_A_ w);
		4809
		4810	{
		4811	EV_P = w->other;
		4812
		4813	ev_loop_fork (EV_A);
		4814	ev_run (EV_A_ EVRUN_NOWAIT);
		4815	}
		4816
		4817	ev_embed_start (EV_A_ w);
2361	}	4818	}
2362		4819
2363	#if 0	4820	#if 0
2364	static void	4821	static void
2365	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	4822	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2367	ev_idle_stop (EV_A_ idle);	4824	ev_idle_stop (EV_A_ idle);
2368	}	4825	}
2369	#endif	4826	#endif
2370		4827
2371	void	4828	void
2372	ev_embed_start (EV_P_ ev_embed *w)	4829	ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2373	{	4830	{
2374	if (expect_false (ev_is_active (w)))	4831	if (expect_false (ev_is_active (w)))
2375	return;	4832	return;
2376		4833
2377	{	4834	{
2378	struct ev_loop *loop = w->other;	4835	EV_P = w->other;
2379	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	4836	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2380	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	4837	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2381	}	4838	}
		4839
		4840	EV_FREQUENT_CHECK;
2382		4841
2383	ev_set_priority (&w->io, ev_priority (w));	4842	ev_set_priority (&w->io, ev_priority (w));
2384	ev_io_start (EV_A_ &w->io);	4843	ev_io_start (EV_A_ &w->io);
2385		4844
2386	ev_prepare_init (&w->prepare, embed_prepare_cb);	4845	ev_prepare_init (&w->prepare, embed_prepare_cb);
2387	ev_set_priority (&w->prepare, EV_MINPRI);	4846	ev_set_priority (&w->prepare, EV_MINPRI);
2388	ev_prepare_start (EV_A_ &w->prepare);	4847	ev_prepare_start (EV_A_ &w->prepare);
2389		4848
		4849	ev_fork_init (&w->fork, embed_fork_cb);
		4850	ev_fork_start (EV_A_ &w->fork);
		4851
2390	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	4852	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2391		4853
2392	ev_start (EV_A_ (W)w, 1);	4854	ev_start (EV_A_ (W)w, 1);
2393	}
2394		4855
		4856	EV_FREQUENT_CHECK;
		4857	}
		4858
2395	void	4859	void
2396	ev_embed_stop (EV_P_ ev_embed *w)	4860	ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
2397	{	4861	{
2398	clear_pending (EV_A_ (W)w);	4862	clear_pending (EV_A_ (W)w);
2399	if (expect_false (!ev_is_active (w)))	4863	if (expect_false (!ev_is_active (w)))
2400	return;	4864	return;
2401		4865
		4866	EV_FREQUENT_CHECK;
		4867
2402	ev_io_stop (EV_A_ &w->io);	4868	ev_io_stop (EV_A_ &w->io);
2403	ev_prepare_stop (EV_A_ &w->prepare);	4869	ev_prepare_stop (EV_A_ &w->prepare);
		4870	ev_fork_stop (EV_A_ &w->fork);
2404		4871
2405	ev_stop (EV_A_ (W)w);	4872	ev_stop (EV_A_ (W)w);
		4873
		4874	EV_FREQUENT_CHECK;
2406	}	4875	}
2407	#endif	4876	#endif
2408		4877
2409	#if EV_FORK_ENABLE	4878	#if EV_FORK_ENABLE
2410	void	4879	void
2411	ev_fork_start (EV_P_ ev_fork *w)	4880	ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
2412	{	4881	{
2413	if (expect_false (ev_is_active (w)))	4882	if (expect_false (ev_is_active (w)))
2414	return;	4883	return;
2415		4884
		4885	EV_FREQUENT_CHECK;
		4886
2416	ev_start (EV_A_ (W)w, ++forkcnt);	4887	ev_start (EV_A_ (W)w, ++forkcnt);
2417	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);	4888	array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
2418	forks [forkcnt - 1] = w;	4889	forks [forkcnt - 1] = w;
2419	}
2420		4890
		4891	EV_FREQUENT_CHECK;
		4892	}
		4893
2421	void	4894	void
2422	ev_fork_stop (EV_P_ ev_fork *w)	4895	ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
2423	{	4896	{
2424	clear_pending (EV_A_ (W)w);	4897	clear_pending (EV_A_ (W)w);
2425	if (expect_false (!ev_is_active (w)))	4898	if (expect_false (!ev_is_active (w)))
2426	return;	4899	return;
2427		4900
		4901	EV_FREQUENT_CHECK;
		4902
2428	{	4903	{
2429	int active = ((W)w)->active;	4904	int active = ev_active (w);
		4905
2430	forks [active - 1] = forks [--forkcnt];	4906	forks [active - 1] = forks [--forkcnt];
2431	((W)forks [active - 1])->active = active;	4907	ev_active (forks [active - 1]) = active;
2432	}	4908	}
2433		4909
2434	ev_stop (EV_A_ (W)w);	4910	ev_stop (EV_A_ (W)w);
2435	}
2436	#endif
2437		4911
		4912	EV_FREQUENT_CHECK;
		4913	}
		4914	#endif
		4915
2438	#if EV_ASYNC_ENABLE	4916	#if EV_CLEANUP_ENABLE
2439	void	4917	void
2440	ev_async_start (EV_P_ ev_async *w)	4918	ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
2441	{	4919	{
2442	if (expect_false (ev_is_active (w)))	4920	if (expect_false (ev_is_active (w)))
2443	return;	4921	return;
2444		4922
2445	evpipe_init (EV_A);	4923	EV_FREQUENT_CHECK;
2446		4924
2447	ev_start (EV_A_ (W)w, ++asynccnt);	4925	ev_start (EV_A_ (W)w, ++cleanupcnt);
2448	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);	4926	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
2449	asyncs [asynccnt - 1] = w;	4927	cleanups [cleanupcnt - 1] = w;
2450	}
2451		4928
		4929	/* cleanup watchers should never keep a refcount on the loop */
		4930	ev_unref (EV_A);
		4931	EV_FREQUENT_CHECK;
		4932	}
		4933
2452	void	4934	void
2453	ev_async_stop (EV_P_ ev_async *w)	4935	ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
2454	{	4936	{
2455	clear_pending (EV_A_ (W)w);	4937	clear_pending (EV_A_ (W)w);
2456	if (expect_false (!ev_is_active (w)))	4938	if (expect_false (!ev_is_active (w)))
2457	return;	4939	return;
2458		4940
		4941	EV_FREQUENT_CHECK;
		4942	ev_ref (EV_A);
		4943
2459	{	4944	{
2460	int active = ((W)w)->active;	4945	int active = ev_active (w);
		4946
		4947	cleanups [active - 1] = cleanups [--cleanupcnt];
		4948	ev_active (cleanups [active - 1]) = active;
		4949	}
		4950
		4951	ev_stop (EV_A_ (W)w);
		4952
		4953	EV_FREQUENT_CHECK;
		4954	}
		4955	#endif
		4956
		4957	#if EV_ASYNC_ENABLE
		4958	void
		4959	ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
		4960	{
		4961	if (expect_false (ev_is_active (w)))
		4962	return;
		4963
		4964	w->sent = 0;
		4965
		4966	evpipe_init (EV_A);
		4967
		4968	EV_FREQUENT_CHECK;
		4969
		4970	ev_start (EV_A_ (W)w, ++asynccnt);
		4971	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
		4972	asyncs [asynccnt - 1] = w;
		4973
		4974	EV_FREQUENT_CHECK;
		4975	}
		4976
		4977	void
		4978	ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
		4979	{
		4980	clear_pending (EV_A_ (W)w);
		4981	if (expect_false (!ev_is_active (w)))
		4982	return;
		4983
		4984	EV_FREQUENT_CHECK;
		4985
		4986	{
		4987	int active = ev_active (w);
		4988
2461	asyncs [active - 1] = asyncs [--asynccnt];	4989	asyncs [active - 1] = asyncs [--asynccnt];
2462	((W)asyncs [active - 1])->active = active;	4990	ev_active (asyncs [active - 1]) = active;
2463	}	4991	}
2464		4992
2465	ev_stop (EV_A_ (W)w);	4993	ev_stop (EV_A_ (W)w);
2466	}
2467		4994
		4995	EV_FREQUENT_CHECK;
		4996	}
		4997
2468	void	4998	void
2469	ev_async_send (EV_P_ ev_async *w)	4999	ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
2470	{	5000	{
2471	w->sent = 1;	5001	w->sent = 1;
2472	evpipe_write (EV_A_ &gotasync);	5002	evpipe_write (EV_A_ &async_pending);
2473	}	5003	}
2474	#endif	5004	#endif
2475		5005
2476	/*****************************************************************************/	5006	/*****************************************************************************/
2477		5007
…		…
2487	once_cb (EV_P_ struct ev_once *once, int revents)	5017	once_cb (EV_P_ struct ev_once *once, int revents)
2488	{	5018	{
2489	void (*cb)(int revents, void *arg) = once->cb;	5019	void (*cb)(int revents, void *arg) = once->cb;
2490	void *arg = once->arg;	5020	void *arg = once->arg;
2491		5021
2492	ev_io_stop (EV_A_ &once->io);	5022	ev_io_stop (EV_A_ &once->io);
2493	ev_timer_stop (EV_A_ &once->to);	5023	ev_timer_stop (EV_A_ &once->to);
2494	ev_free (once);	5024	ev_free (once);
2495		5025
2496	cb (revents, arg);	5026	cb (revents, arg);
2497	}	5027	}
2498		5028
2499	static void	5029	static void
2500	once_cb_io (EV_P_ ev_io *w, int revents)	5030	once_cb_io (EV_P_ ev_io *w, int revents)
2501	{	5031	{
2502	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	5032	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		5033
		5034	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2503	}	5035	}
2504		5036
2505	static void	5037	static void
2506	once_cb_to (EV_P_ ev_timer *w, int revents)	5038	once_cb_to (EV_P_ ev_timer *w, int revents)
2507	{	5039	{
2508	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	5040	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2509	}
2510		5041
		5042	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
		5043	}
		5044
2511	void	5045	void
2512	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	5046	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
2513	{	5047	{
2514	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	5048	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2515
2516	if (expect_false (!once))
2517	{
2518	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2519	return;
2520	}
2521		5049
2522	once->cb = cb;	5050	once->cb = cb;
2523	once->arg = arg;	5051	once->arg = arg;
2524		5052
2525	ev_init (&once->io, once_cb_io);	5053	ev_init (&once->io, once_cb_io);
…		…
2535	ev_timer_set (&once->to, timeout, 0.);	5063	ev_timer_set (&once->to, timeout, 0.);
2536	ev_timer_start (EV_A_ &once->to);	5064	ev_timer_start (EV_A_ &once->to);
2537	}	5065	}
2538	}	5066	}
2539		5067
		5068	/*****************************************************************************/
		5069
		5070	#if EV_WALK_ENABLE
		5071	ecb_cold
		5072	void
		5073	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
		5074	{
		5075	int i, j;
		5076	ev_watcher_list *wl, *wn;
		5077
		5078	if (types & (EV_IO | EV_EMBED))
		5079	for (i = 0; i < anfdmax; ++i)
		5080	for (wl = anfds [i].head; wl; )
		5081	{
		5082	wn = wl->next;
		5083
		5084	#if EV_EMBED_ENABLE
		5085	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		5086	{
		5087	if (types & EV_EMBED)
		5088	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		5089	}
		5090	else
		5091	#endif
		5092	#if EV_USE_INOTIFY
		5093	if (ev_cb ((ev_io *)wl) == infy_cb)
		5094	;
		5095	else
		5096	#endif
		5097	if ((ev_io *)wl != &pipe_w)
		5098	if (types & EV_IO)
		5099	cb (EV_A_ EV_IO, wl);
		5100
		5101	wl = wn;
		5102	}
		5103
		5104	if (types & (EV_TIMER | EV_STAT))
		5105	for (i = timercnt + HEAP0; i-- > HEAP0; )
		5106	#if EV_STAT_ENABLE
		5107	/*TODO: timer is not always active*/
		5108	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		5109	{
		5110	if (types & EV_STAT)
		5111	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		5112	}
		5113	else
		5114	#endif
		5115	if (types & EV_TIMER)
		5116	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		5117
		5118	#if EV_PERIODIC_ENABLE
		5119	if (types & EV_PERIODIC)
		5120	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		5121	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		5122	#endif
		5123
		5124	#if EV_IDLE_ENABLE
		5125	if (types & EV_IDLE)
		5126	for (j = NUMPRI; j--; )
		5127	for (i = idlecnt [j]; i--; )
		5128	cb (EV_A_ EV_IDLE, idles [j][i]);
		5129	#endif
		5130
		5131	#if EV_FORK_ENABLE
		5132	if (types & EV_FORK)
		5133	for (i = forkcnt; i--; )
		5134	if (ev_cb (forks [i]) != embed_fork_cb)
		5135	cb (EV_A_ EV_FORK, forks [i]);
		5136	#endif
		5137
		5138	#if EV_ASYNC_ENABLE
		5139	if (types & EV_ASYNC)
		5140	for (i = asynccnt; i--; )
		5141	cb (EV_A_ EV_ASYNC, asyncs [i]);
		5142	#endif
		5143
		5144	#if EV_PREPARE_ENABLE
		5145	if (types & EV_PREPARE)
		5146	for (i = preparecnt; i--; )
		5147	# if EV_EMBED_ENABLE
		5148	if (ev_cb (prepares [i]) != embed_prepare_cb)
		5149	# endif
		5150	cb (EV_A_ EV_PREPARE, prepares [i]);
		5151	#endif
		5152
		5153	#if EV_CHECK_ENABLE
		5154	if (types & EV_CHECK)
		5155	for (i = checkcnt; i--; )
		5156	cb (EV_A_ EV_CHECK, checks [i]);
		5157	#endif
		5158
		5159	#if EV_SIGNAL_ENABLE
		5160	if (types & EV_SIGNAL)
		5161	for (i = 0; i < EV_NSIG - 1; ++i)
		5162	for (wl = signals [i].head; wl; )
		5163	{
		5164	wn = wl->next;
		5165	cb (EV_A_ EV_SIGNAL, wl);
		5166	wl = wn;
		5167	}
		5168	#endif
		5169
		5170	#if EV_CHILD_ENABLE
		5171	if (types & EV_CHILD)
		5172	for (i = (EV_PID_HASHSIZE); i--; )
		5173	for (wl = childs [i]; wl; )
		5174	{
		5175	wn = wl->next;
		5176	cb (EV_A_ EV_CHILD, wl);
		5177	wl = wn;
		5178	}
		5179	#endif
		5180	/* EV_STAT 0x00001000 /* stat data changed */
		5181	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		5182	}
		5183	#endif
		5184
2540	#if EV_MULTIPLICITY	5185	#if EV_MULTIPLICITY
2541	#include "ev_wrap.h"	5186	#include "ev_wrap.h"
2542	#endif	5187	#endif
2543		5188
2544	#ifdef __cplusplus
2545	}
2546	#endif
2547

Diff Legend

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