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Comparing libev/ev.c (file contents):
Revision 1.205 by root, Sun Jan 20 15:37:03 2008 UTC vs.
Revision 1.347 by root, Fri Oct 15 22:44:41 2010 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without 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	*
…		…
39		39
40	#ifdef __cplusplus	40	#ifdef __cplusplus
41	extern "C" {	41	extern "C" {
42	#endif	42	#endif
43		43
		44	/* this big block deduces configuration from config.h */
44	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
45	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
46	# include EV_CONFIG_H	47	# include EV_CONFIG_H
47	# else	48	# else
48	# include "config.h"	49	# include "config.h"
49	# endif	50	# endif
50		51
		52	# if HAVE_CLOCK_SYSCALL
		53	# ifndef EV_USE_CLOCK_SYSCALL
		54	# define EV_USE_CLOCK_SYSCALL 1
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 0
		57	# endif
		58	# ifndef EV_USE_MONOTONIC
		59	# define EV_USE_MONOTONIC 1
		60	# endif
		61	# endif
		62	# elif !defined(EV_USE_CLOCK_SYSCALL)
		63	# define EV_USE_CLOCK_SYSCALL 0
		64	# endif
		65
51	# if HAVE_CLOCK_GETTIME	66	# if HAVE_CLOCK_GETTIME
52	# ifndef EV_USE_MONOTONIC	67	# ifndef EV_USE_MONOTONIC
53	# define EV_USE_MONOTONIC 1	68	# define EV_USE_MONOTONIC 1
54	# endif	69	# endif
55	# ifndef EV_USE_REALTIME	70	# ifndef EV_USE_REALTIME
56	# define EV_USE_REALTIME 1	71	# define EV_USE_REALTIME 0
57	# endif	72	# endif
58	# else	73	# else
59	# ifndef EV_USE_MONOTONIC	74	# ifndef EV_USE_MONOTONIC
60	# define EV_USE_MONOTONIC 0	75	# define EV_USE_MONOTONIC 0
61	# endif	76	# endif
62	# ifndef EV_USE_REALTIME	77	# ifndef EV_USE_REALTIME
63	# define EV_USE_REALTIME 0	78	# define EV_USE_REALTIME 0
64	# endif	79	# endif
65	# endif	80	# endif
66		81
		82	# if HAVE_NANOSLEEP
67	# ifndef EV_USE_NANOSLEEP	83	# ifndef EV_USE_NANOSLEEP
68	# if HAVE_NANOSLEEP
69	# define EV_USE_NANOSLEEP 1	84	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		85	# endif
70	# else	86	# else
		87	# undef EV_USE_NANOSLEEP
71	# define EV_USE_NANOSLEEP 0	88	# define EV_USE_NANOSLEEP 0
		89	# endif
		90
		91	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		92	# ifndef EV_USE_SELECT
		93	# define EV_USE_SELECT EV_FEATURE_BACKENDS
72	# endif	94	# endif
		95	# else
		96	# undef EV_USE_SELECT
		97	# define EV_USE_SELECT 0
73	# endif	98	# endif
74		99
		100	# if HAVE_POLL && HAVE_POLL_H
75	# ifndef EV_USE_SELECT	101	# ifndef EV_USE_POLL
76	# if HAVE_SELECT && HAVE_SYS_SELECT_H	102	# define EV_USE_POLL EV_FEATURE_BACKENDS
77	# define EV_USE_SELECT 1
78	# else
79	# define EV_USE_SELECT 0
80	# endif	103	# endif
81	# endif
82
83	# ifndef EV_USE_POLL
84	# if HAVE_POLL && HAVE_POLL_H
85	# define EV_USE_POLL 1
86	# else	104	# else
		105	# undef EV_USE_POLL
87	# define EV_USE_POLL 0	106	# define EV_USE_POLL 0
88	# endif
89	# endif	107	# endif
90		108
91	# ifndef EV_USE_EPOLL
92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	109	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93	# define EV_USE_EPOLL 1	110	# ifndef EV_USE_EPOLL
94	# else	111	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
95	# define EV_USE_EPOLL 0
96	# endif	112	# endif
		113	# else
		114	# undef EV_USE_EPOLL
		115	# define EV_USE_EPOLL 0
97	# endif	116	# endif
98		117
		118	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
99	# ifndef EV_USE_KQUEUE	119	# ifndef EV_USE_KQUEUE
100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	120	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
101	# define EV_USE_KQUEUE 1
102	# else
103	# define EV_USE_KQUEUE 0
104	# endif	121	# endif
		122	# else
		123	# undef EV_USE_KQUEUE
		124	# define EV_USE_KQUEUE 0
105	# endif	125	# endif
106		126
107	# ifndef EV_USE_PORT
108	# if HAVE_PORT_H && HAVE_PORT_CREATE	127	# if HAVE_PORT_H && HAVE_PORT_CREATE
109	# define EV_USE_PORT 1	128	# ifndef EV_USE_PORT
110	# else	129	# define EV_USE_PORT EV_FEATURE_BACKENDS
111	# define EV_USE_PORT 0
112	# endif	130	# endif
		131	# else
		132	# undef EV_USE_PORT
		133	# define EV_USE_PORT 0
113	# endif	134	# endif
114		135
115	# ifndef EV_USE_INOTIFY
116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H	136	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
117	# define EV_USE_INOTIFY 1	137	# ifndef EV_USE_INOTIFY
118	# else
119	# define EV_USE_INOTIFY 0	138	# define EV_USE_INOTIFY EV_FEATURE_OS
120	# endif	139	# endif
		140	# else
		141	# undef EV_USE_INOTIFY
		142	# define EV_USE_INOTIFY 0
121	# endif	143	# endif
122		144
		145	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		146	# ifndef EV_USE_SIGNALFD
		147	# define EV_USE_SIGNALFD EV_FEATURE_OS
		148	# endif
		149	# else
		150	# undef EV_USE_SIGNALFD
		151	# define EV_USE_SIGNALFD 0
		152	# endif
		153
		154	# if HAVE_EVENTFD
		155	# ifndef EV_USE_EVENTFD
		156	# define EV_USE_EVENTFD EV_FEATURE_OS
		157	# endif
		158	# else
		159	# undef EV_USE_EVENTFD
		160	# define EV_USE_EVENTFD 0
		161	# endif
		162
123	#endif	163	#endif
124		164
125	#include <math.h>	165	#include <math.h>
126	#include <stdlib.h>	166	#include <stdlib.h>
		167	#include <string.h>
127	#include <fcntl.h>	168	#include <fcntl.h>
128	#include <stddef.h>	169	#include <stddef.h>
129		170
130	#include <stdio.h>	171	#include <stdio.h>
131		172
132	#include <assert.h>	173	#include <assert.h>
133	#include <errno.h>	174	#include <errno.h>
134	#include <sys/types.h>	175	#include <sys/types.h>
135	#include <time.h>	176	#include <time.h>
		177	#include <limits.h>
136		178
137	#include <signal.h>	179	#include <signal.h>
138		180
139	#ifdef EV_H	181	#ifdef EV_H
140	# include EV_H	182	# include EV_H
…		…
145	#ifndef _WIN32	187	#ifndef _WIN32
146	# include <sys/time.h>	188	# include <sys/time.h>
147	# include <sys/wait.h>	189	# include <sys/wait.h>
148	# include <unistd.h>	190	# include <unistd.h>
149	#else	191	#else
		192	# include <io.h>
150	# define WIN32_LEAN_AND_MEAN	193	# define WIN32_LEAN_AND_MEAN
151	# include <windows.h>	194	# include <windows.h>
152	# ifndef EV_SELECT_IS_WINSOCKET	195	# ifndef EV_SELECT_IS_WINSOCKET
153	# define EV_SELECT_IS_WINSOCKET 1	196	# define EV_SELECT_IS_WINSOCKET 1
154	# endif	197	# endif
		198	# undef EV_AVOID_STDIO
		199	#endif
		200
		201	/* OS X, in its infinite idiocy, actually HARDCODES
		202	* a limit of 1024 into their select. Where people have brains,
		203	* OS X engineers apparently have a vacuum. Or maybe they were
		204	* ordered to have a vacuum, or they do anything for money.
		205	* This might help. Or not.
		206	*/
		207	#define _DARWIN_UNLIMITED_SELECT 1
		208
		209	/* this block tries to deduce configuration from header-defined symbols and defaults */
		210
		211	/* try to deduce the maximum number of signals on this platform */
		212	#if defined (EV_NSIG)
		213	/* use what's provided */
		214	#elif defined (NSIG)
		215	# define EV_NSIG (NSIG)
		216	#elif defined(_NSIG)
		217	# define EV_NSIG (_NSIG)
		218	#elif defined (SIGMAX)
		219	# define EV_NSIG (SIGMAX+1)
		220	#elif defined (SIG_MAX)
		221	# define EV_NSIG (SIG_MAX+1)
		222	#elif defined (_SIG_MAX)
		223	# define EV_NSIG (_SIG_MAX+1)
		224	#elif defined (MAXSIG)
		225	# define EV_NSIG (MAXSIG+1)
		226	#elif defined (MAX_SIG)
		227	# define EV_NSIG (MAX_SIG+1)
		228	#elif defined (SIGARRAYSIZE)
		229	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		230	#elif defined (_sys_nsig)
		231	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		232	#else
		233	# error "unable to find value for NSIG, please report"
		234	/* to make it compile regardless, just remove the above line, */
		235	/* but consider reporting it, too! :) */
		236	# define EV_NSIG 65
		237	#endif
		238
		239	#ifndef EV_USE_CLOCK_SYSCALL
		240	# if __linux && __GLIBC__ >= 2
		241	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
		242	# else
		243	# define EV_USE_CLOCK_SYSCALL 0
155	#endif	244	# endif
156		245	#endif
157	/**/
158		246
159	#ifndef EV_USE_MONOTONIC	247	#ifndef EV_USE_MONOTONIC
		248	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		249	# define EV_USE_MONOTONIC EV_FEATURE_OS
		250	# else
160	# define EV_USE_MONOTONIC 0	251	# define EV_USE_MONOTONIC 0
		252	# endif
161	#endif	253	#endif
162		254
163	#ifndef EV_USE_REALTIME	255	#ifndef EV_USE_REALTIME
164	# define EV_USE_REALTIME 0	256	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
165	#endif	257	#endif
166		258
167	#ifndef EV_USE_NANOSLEEP	259	#ifndef EV_USE_NANOSLEEP
		260	# if _POSIX_C_SOURCE >= 199309L
		261	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		262	# else
168	# define EV_USE_NANOSLEEP 0	263	# define EV_USE_NANOSLEEP 0
		264	# endif
169	#endif	265	#endif
170		266
171	#ifndef EV_USE_SELECT	267	#ifndef EV_USE_SELECT
172	# define EV_USE_SELECT 1	268	# define EV_USE_SELECT EV_FEATURE_BACKENDS
173	#endif	269	#endif
174		270
175	#ifndef EV_USE_POLL	271	#ifndef EV_USE_POLL
176	# ifdef _WIN32	272	# ifdef _WIN32
177	# define EV_USE_POLL 0	273	# define EV_USE_POLL 0
178	# else	274	# else
179	# define EV_USE_POLL 1	275	# define EV_USE_POLL EV_FEATURE_BACKENDS
180	# endif	276	# endif
181	#endif	277	#endif
182		278
183	#ifndef EV_USE_EPOLL	279	#ifndef EV_USE_EPOLL
		280	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		281	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
		282	# else
184	# define EV_USE_EPOLL 0	283	# define EV_USE_EPOLL 0
		284	# endif
185	#endif	285	#endif
186		286
187	#ifndef EV_USE_KQUEUE	287	#ifndef EV_USE_KQUEUE
188	# define EV_USE_KQUEUE 0	288	# define EV_USE_KQUEUE 0
189	#endif	289	#endif
…		…
191	#ifndef EV_USE_PORT	291	#ifndef EV_USE_PORT
192	# define EV_USE_PORT 0	292	# define EV_USE_PORT 0
193	#endif	293	#endif
194		294
195	#ifndef EV_USE_INOTIFY	295	#ifndef EV_USE_INOTIFY
		296	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		297	# define EV_USE_INOTIFY EV_FEATURE_OS
		298	# else
196	# define EV_USE_INOTIFY 0	299	# define EV_USE_INOTIFY 0
		300	# endif
197	#endif	301	#endif
198		302
199	#ifndef EV_PID_HASHSIZE	303	#ifndef EV_PID_HASHSIZE
200	# if EV_MINIMAL	304	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
201	# define EV_PID_HASHSIZE 1	305	#endif
		306
		307	#ifndef EV_INOTIFY_HASHSIZE
		308	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
		309	#endif
		310
		311	#ifndef EV_USE_EVENTFD
		312	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		313	# define EV_USE_EVENTFD EV_FEATURE_OS
202	# else	314	# else
203	# define EV_PID_HASHSIZE 16	315	# define EV_USE_EVENTFD 0
204	# endif	316	# endif
205	#endif	317	#endif
206		318
207	#ifndef EV_INOTIFY_HASHSIZE	319	#ifndef EV_USE_SIGNALFD
208	# if EV_MINIMAL	320	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
209	# define EV_INOTIFY_HASHSIZE 1	321	# define EV_USE_SIGNALFD EV_FEATURE_OS
210	# else	322	# else
211	# define EV_INOTIFY_HASHSIZE 16	323	# define EV_USE_SIGNALFD 0
212	# endif	324	# endif
213	#endif	325	#endif
214		326
215	/**/	327	#if 0 /* debugging */
		328	# define EV_VERIFY 3
		329	# define EV_USE_4HEAP 1
		330	# define EV_HEAP_CACHE_AT 1
		331	#endif
		332
		333	#ifndef EV_VERIFY
		334	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
		335	#endif
		336
		337	#ifndef EV_USE_4HEAP
		338	# define EV_USE_4HEAP EV_FEATURE_DATA
		339	#endif
		340
		341	#ifndef EV_HEAP_CACHE_AT
		342	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
		343	#endif
		344
		345	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		346	/* which makes programs even slower. might work on other unices, too. */
		347	#if EV_USE_CLOCK_SYSCALL
		348	# include <syscall.h>
		349	# ifdef SYS_clock_gettime
		350	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		351	# undef EV_USE_MONOTONIC
		352	# define EV_USE_MONOTONIC 1
		353	# else
		354	# undef EV_USE_CLOCK_SYSCALL
		355	# define EV_USE_CLOCK_SYSCALL 0
		356	# endif
		357	#endif
		358
		359	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		360
		361	#ifdef _AIX
		362	/* AIX has a completely broken poll.h header */
		363	# undef EV_USE_POLL
		364	# define EV_USE_POLL 0
		365	#endif
216		366
217	#ifndef CLOCK_MONOTONIC	367	#ifndef CLOCK_MONOTONIC
218	# undef EV_USE_MONOTONIC	368	# undef EV_USE_MONOTONIC
219	# define EV_USE_MONOTONIC 0	369	# define EV_USE_MONOTONIC 0
220	#endif	370	#endif
…		…
234	# include <sys/select.h>	384	# include <sys/select.h>
235	# endif	385	# endif
236	#endif	386	#endif
237		387
238	#if EV_USE_INOTIFY	388	#if EV_USE_INOTIFY
		389	# include <sys/utsname.h>
		390	# include <sys/statfs.h>
239	# include <sys/inotify.h>	391	# include <sys/inotify.h>
		392	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		393	# ifndef IN_DONT_FOLLOW
		394	# undef EV_USE_INOTIFY
		395	# define EV_USE_INOTIFY 0
		396	# endif
240	#endif	397	#endif
241		398
242	#if EV_SELECT_IS_WINSOCKET	399	#if EV_SELECT_IS_WINSOCKET
243	# include <winsock.h>	400	# include <winsock.h>
244	#endif	401	#endif
245		402
		403	#if EV_USE_EVENTFD
		404	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		405	# include <stdint.h>
		406	# ifndef EFD_NONBLOCK
		407	# define EFD_NONBLOCK O_NONBLOCK
		408	# endif
		409	# ifndef EFD_CLOEXEC
		410	# ifdef O_CLOEXEC
		411	# define EFD_CLOEXEC O_CLOEXEC
		412	# else
		413	# define EFD_CLOEXEC 02000000
		414	# endif
		415	# endif
		416	# ifdef __cplusplus
		417	extern "C" {
		418	# endif
		419	int (eventfd) (unsigned int initval, int flags);
		420	# ifdef __cplusplus
		421	}
		422	# endif
		423	#endif
		424
		425	#if EV_USE_SIGNALFD
		426	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		427	# include <stdint.h>
		428	# ifndef SFD_NONBLOCK
		429	# define SFD_NONBLOCK O_NONBLOCK
		430	# endif
		431	# ifndef SFD_CLOEXEC
		432	# ifdef O_CLOEXEC
		433	# define SFD_CLOEXEC O_CLOEXEC
		434	# else
		435	# define SFD_CLOEXEC 02000000
		436	# endif
		437	# endif
		438	# ifdef __cplusplus
		439	extern "C" {
		440	# endif
		441	int signalfd (int fd, const sigset_t *mask, int flags);
		442
		443	struct signalfd_siginfo
		444	{
		445	uint32_t ssi_signo;
		446	char pad[128 - sizeof (uint32_t)];
		447	};
		448	# ifdef __cplusplus
		449	}
		450	# endif
		451	#endif
		452
246	/**/	453	/**/
		454
		455	#if EV_VERIFY >= 3
		456	# define EV_FREQUENT_CHECK ev_verify (EV_A)
		457	#else
		458	# define EV_FREQUENT_CHECK do { } while (0)
		459	#endif
247		460
248	/*	461	/*
249	* This is used to avoid floating point rounding problems.	462	* This is used to avoid floating point rounding problems.
250	* It is added to ev_rt_now when scheduling periodics	463	* It is added to ev_rt_now when scheduling periodics
251	* to ensure progress, time-wise, even when rounding	464	* to ensure progress, time-wise, even when rounding
…		…
255	*/	468	*/
256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	469	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
257		470
258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	471	#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) */	472	#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 */	473
		474	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
		475	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; tv.tv_nsec = (long)((t - tv.tv_sec) * 1e9); } while (0)
261		476
262	#if __GNUC__ >= 4	477	#if __GNUC__ >= 4
263	# define expect(expr,value) __builtin_expect ((expr),(value))	478	# define expect(expr,value) __builtin_expect ((expr),(value))
264	# define noinline __attribute__ ((noinline))	479	# define noinline __attribute__ ((noinline))
265	#else	480	#else
266	# define expect(expr,value) (expr)	481	# define expect(expr,value) (expr)
267	# define noinline	482	# define noinline
268	# if __STDC_VERSION__ < 199901L	483	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
269	# define inline	484	# define inline
270	# endif	485	# endif
271	#endif	486	#endif
272		487
273	#define expect_false(expr) expect ((expr) != 0, 0)	488	#define expect_false(expr) expect ((expr) != 0, 0)
274	#define expect_true(expr) expect ((expr) != 0, 1)	489	#define expect_true(expr) expect ((expr) != 0, 1)
275	#define inline_size static inline	490	#define inline_size static inline
276		491
277	#if EV_MINIMAL	492	#if EV_FEATURE_CODE
		493	# define inline_speed static inline
		494	#else
278	# define inline_speed static noinline	495	# define inline_speed static noinline
		496	#endif
		497
		498	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		499
		500	#if EV_MINPRI == EV_MAXPRI
		501	# define ABSPRI(w) (((W)w), 0)
279	#else	502	#else
280	# define inline_speed static inline
281	#endif
282
283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	503	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		504	#endif
285		505
286	#define EMPTY /* required for microsofts broken pseudo-c compiler */	506	#define EMPTY /* required for microsofts broken pseudo-c compiler */
287	#define EMPTY2(a,b) /* used to suppress some warnings */	507	#define EMPTY2(a,b) /* used to suppress some warnings */
288		508
289	typedef ev_watcher *W;	509	typedef ev_watcher *W;
290	typedef ev_watcher_list *WL;	510	typedef ev_watcher_list *WL;
291	typedef ev_watcher_time *WT;	511	typedef ev_watcher_time *WT;
292		512
		513	#define ev_active(w) ((W)(w))->active
		514	#define ev_at(w) ((WT)(w))->at
		515
		516	#if EV_USE_REALTIME
		517	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		518	/* giving it a reasonably high chance of working on typical architectures */
		519	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		520	#endif
		521
293	#if EV_USE_MONOTONIC	522	#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 sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	523	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		524	#endif
		525
		526	#ifndef EV_FD_TO_WIN32_HANDLE
		527	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		528	#endif
		529	#ifndef EV_WIN32_HANDLE_TO_FD
		530	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		531	#endif
		532	#ifndef EV_WIN32_CLOSE_FD
		533	# define EV_WIN32_CLOSE_FD(fd) close (fd)
297	#endif	534	#endif
298		535
299	#ifdef _WIN32	536	#ifdef _WIN32
300	# include "ev_win32.c"	537	# include "ev_win32.c"
301	#endif	538	#endif
302		539
303	/*****************************************************************************/	540	/*****************************************************************************/
304		541
		542	#if EV_AVOID_STDIO
		543	static void noinline
		544	ev_printerr (const char *msg)
		545	{
		546	write (STDERR_FILENO, msg, strlen (msg));
		547	}
		548	#endif
		549
305	static void (*syserr_cb)(const char *msg);	550	static void (*syserr_cb)(const char *msg);
306		551
307	void	552	void
308	ev_set_syserr_cb (void (*cb)(const char *msg))	553	ev_set_syserr_cb (void (*cb)(const char *msg))
309	{	554	{
310	syserr_cb = cb;	555	syserr_cb = cb;
311	}	556	}
312		557
313	static void noinline	558	static void noinline
314	syserr (const char *msg)	559	ev_syserr (const char *msg)
315	{	560	{
316	if (!msg)	561	if (!msg)
317	msg = "(libev) system error";	562	msg = "(libev) system error";
318		563
319	if (syserr_cb)	564	if (syserr_cb)
320	syserr_cb (msg);	565	syserr_cb (msg);
321	else	566	else
322	{	567	{
		568	#if EV_AVOID_STDIO
		569	const char *err = strerror (errno);
		570
		571	ev_printerr (msg);
		572	ev_printerr (": ");
		573	ev_printerr (err);
		574	ev_printerr ("\n");
		575	#else
323	perror (msg);	576	perror (msg);
		577	#endif
324	abort ();	578	abort ();
325	}	579	}
326	}	580	}
327		581
		582	static void *
		583	ev_realloc_emul (void *ptr, long size)
		584	{
		585	#if __GLIBC__
		586	return realloc (ptr, size);
		587	#else
		588	/* some systems, notably openbsd and darwin, fail to properly
		589	* implement realloc (x, 0) (as required by both ansi c-89 and
		590	* the single unix specification, so work around them here.
		591	*/
		592
		593	if (size)
		594	return realloc (ptr, size);
		595
		596	free (ptr);
		597	return 0;
		598	#endif
		599	}
		600
328	static void *(*alloc)(void *ptr, long size);	601	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
329		602
330	void	603	void
331	ev_set_allocator (void *(*cb)(void *ptr, long size))	604	ev_set_allocator (void *(*cb)(void *ptr, long size))
332	{	605	{
333	alloc = cb;	606	alloc = cb;
334	}	607	}
335		608
336	inline_speed void *	609	inline_speed void *
337	ev_realloc (void *ptr, long size)	610	ev_realloc (void *ptr, long size)
338	{	611	{
339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	612	ptr = alloc (ptr, size);
340		613
341	if (!ptr && size)	614	if (!ptr && size)
342	{	615	{
		616	#if EV_AVOID_STDIO
		617	ev_printerr ("libev: memory allocation failed, aborting.\n");
		618	#else
343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	619	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		620	#endif
344	abort ();	621	abort ();
345	}	622	}
346		623
347	return ptr;	624	return ptr;
348	}	625	}
…		…
350	#define ev_malloc(size) ev_realloc (0, (size))	627	#define ev_malloc(size) ev_realloc (0, (size))
351	#define ev_free(ptr) ev_realloc ((ptr), 0)	628	#define ev_free(ptr) ev_realloc ((ptr), 0)
352		629
353	/*****************************************************************************/	630	/*****************************************************************************/
354		631
		632	/* set in reify when reification needed */
		633	#define EV_ANFD_REIFY 1
		634
		635	/* file descriptor info structure */
355	typedef struct	636	typedef struct
356	{	637	{
357	WL head;	638	WL head;
358	unsigned char events;	639	unsigned char events; /* the events watched for */
		640	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		641	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
359	unsigned char reify;	642	unsigned char unused;
		643	#if EV_USE_EPOLL
		644	unsigned int egen; /* generation counter to counter epoll bugs */
		645	#endif
360	#if EV_SELECT_IS_WINSOCKET	646	#if EV_SELECT_IS_WINSOCKET
361	SOCKET handle;	647	SOCKET handle;
362	#endif	648	#endif
363	} ANFD;	649	} ANFD;
364		650
		651	/* stores the pending event set for a given watcher */
365	typedef struct	652	typedef struct
366	{	653	{
367	W w;	654	W w;
368	int events;	655	int events; /* the pending event set for the given watcher */
369	} ANPENDING;	656	} ANPENDING;
370		657
371	#if EV_USE_INOTIFY	658	#if EV_USE_INOTIFY
		659	/* hash table entry per inotify-id */
372	typedef struct	660	typedef struct
373	{	661	{
374	WL head;	662	WL head;
375	} ANFS;	663	} ANFS;
		664	#endif
		665
		666	/* Heap Entry */
		667	#if EV_HEAP_CACHE_AT
		668	/* a heap element */
		669	typedef struct {
		670	ev_tstamp at;
		671	WT w;
		672	} ANHE;
		673
		674	#define ANHE_w(he) (he).w /* access watcher, read-write */
		675	#define ANHE_at(he) (he).at /* access cached at, read-only */
		676	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		677	#else
		678	/* a heap element */
		679	typedef WT ANHE;
		680
		681	#define ANHE_w(he) (he)
		682	#define ANHE_at(he) (he)->at
		683	#define ANHE_at_cache(he)
376	#endif	684	#endif
377		685
378	#if EV_MULTIPLICITY	686	#if EV_MULTIPLICITY
379		687
380	struct ev_loop	688	struct ev_loop
…		…
399		707
400	static int ev_default_loop_ptr;	708	static int ev_default_loop_ptr;
401		709
402	#endif	710	#endif
403		711
		712	#if EV_FEATURE_API
		713	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		714	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		715	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		716	#else
		717	# define EV_RELEASE_CB (void)0
		718	# define EV_ACQUIRE_CB (void)0
		719	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		720	#endif
		721
		722	#define EVUNLOOP_RECURSE 0x80
		723
404	/*****************************************************************************/	724	/*****************************************************************************/
405		725
		726	#ifndef EV_HAVE_EV_TIME
406	ev_tstamp	727	ev_tstamp
407	ev_time (void)	728	ev_time (void)
408	{	729	{
409	#if EV_USE_REALTIME	730	#if EV_USE_REALTIME
		731	if (expect_true (have_realtime))
		732	{
410	struct timespec ts;	733	struct timespec ts;
411	clock_gettime (CLOCK_REALTIME, &ts);	734	clock_gettime (CLOCK_REALTIME, &ts);
412	return ts.tv_sec + ts.tv_nsec * 1e-9;	735	return ts.tv_sec + ts.tv_nsec * 1e-9;
413	#else	736	}
		737	#endif
		738
414	struct timeval tv;	739	struct timeval tv;
415	gettimeofday (&tv, 0);	740	gettimeofday (&tv, 0);
416	return tv.tv_sec + tv.tv_usec * 1e-6;	741	return tv.tv_sec + tv.tv_usec * 1e-6;
417	#endif
418	}	742	}
		743	#endif
419		744
420	ev_tstamp inline_size	745	inline_size ev_tstamp
421	get_clock (void)	746	get_clock (void)
422	{	747	{
423	#if EV_USE_MONOTONIC	748	#if EV_USE_MONOTONIC
424	if (expect_true (have_monotonic))	749	if (expect_true (have_monotonic))
425	{	750	{
…		…
446	if (delay > 0.)	771	if (delay > 0.)
447	{	772	{
448	#if EV_USE_NANOSLEEP	773	#if EV_USE_NANOSLEEP
449	struct timespec ts;	774	struct timespec ts;
450		775
451	ts.tv_sec = (time_t)delay;	776	EV_SET_TS (ts, delay);
452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454	nanosleep (&ts, 0);	777	nanosleep (&ts, 0);
455	#elif defined(_WIN32)	778	#elif defined(_WIN32)
456	Sleep (delay * 1e3);	779	Sleep ((unsigned long)(delay * 1e3));
457	#else	780	#else
458	struct timeval tv;	781	struct timeval tv;
459		782
460	tv.tv_sec = (time_t)delay;	783	/* 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);	784	/* something not guaranteed by newer posix versions, but guaranteed */
462		785	/* by older ones */
		786	EV_SET_TV (tv, delay);
463	select (0, 0, 0, 0, &tv);	787	select (0, 0, 0, 0, &tv);
464	#endif	788	#endif
465	}	789	}
466	}	790	}
467		791
468	/*****************************************************************************/	792	/*****************************************************************************/
469		793
470	int inline_size	794	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		795
		796	/* find a suitable new size for the given array, */
		797	/* hopefully by rounding to a nice-to-malloc size */
		798	inline_size int
471	array_nextsize (int elem, int cur, int cnt)	799	array_nextsize (int elem, int cur, int cnt)
472	{	800	{
473	int ncur = cur + 1;	801	int ncur = cur + 1;
474		802
475	do	803	do
476	ncur <<= 1;	804	ncur <<= 1;
477	while (cnt > ncur);	805	while (cnt > ncur);
478		806
479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	807	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
480	if (elem * ncur > 4096)	808	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
481	{	809	{
482	ncur *= elem;	810	ncur *= elem;
483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	811	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
484	ncur = ncur - sizeof (void *) * 4;	812	ncur = ncur - sizeof (void *) * 4;
485	ncur /= elem;	813	ncur /= elem;
486	}	814	}
487		815
488	return ncur;	816	return ncur;
…		…
492	array_realloc (int elem, void *base, int *cur, int cnt)	820	array_realloc (int elem, void *base, int *cur, int cnt)
493	{	821	{
494	*cur = array_nextsize (elem, *cur, cnt);	822	*cur = array_nextsize (elem, *cur, cnt);
495	return ev_realloc (base, elem * *cur);	823	return ev_realloc (base, elem * *cur);
496	}	824	}
		825
		826	#define array_init_zero(base,count) \
		827	memset ((void *)(base), 0, sizeof (*(base)) * (count))
497		828
498	#define array_needsize(type,base,cur,cnt,init) \	829	#define array_needsize(type,base,cur,cnt,init) \
499	if (expect_false ((cnt) > (cur))) \	830	if (expect_false ((cnt) > (cur))) \
500	{ \	831	{ \
501	int ocur_ = (cur); \	832	int ocur_ = (cur); \
…		…
513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	844	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514	}	845	}
515	#endif	846	#endif
516		847
517	#define array_free(stem, idx) \	848	#define array_free(stem, idx) \
518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	849	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
519		850
520	/*****************************************************************************/	851	/*****************************************************************************/
		852
		853	/* dummy callback for pending events */
		854	static void noinline
		855	pendingcb (EV_P_ ev_prepare *w, int revents)
		856	{
		857	}
521		858
522	void noinline	859	void noinline
523	ev_feed_event (EV_P_ void *w, int revents)	860	ev_feed_event (EV_P_ void *w, int revents)
524	{	861	{
525	W w_ = (W)w;	862	W w_ = (W)w;
…		…
534	pendings [pri][w_->pending - 1].w = w_;	871	pendings [pri][w_->pending - 1].w = w_;
535	pendings [pri][w_->pending - 1].events = revents;	872	pendings [pri][w_->pending - 1].events = revents;
536	}	873	}
537	}	874	}
538		875
539	void inline_speed	876	inline_speed void
		877	feed_reverse (EV_P_ W w)
		878	{
		879	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		880	rfeeds [rfeedcnt++] = w;
		881	}
		882
		883	inline_size void
		884	feed_reverse_done (EV_P_ int revents)
		885	{
		886	do
		887	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		888	while (rfeedcnt);
		889	}
		890
		891	inline_speed void
540	queue_events (EV_P_ W *events, int eventcnt, int type)	892	queue_events (EV_P_ W *events, int eventcnt, int type)
541	{	893	{
542	int i;	894	int i;
543		895
544	for (i = 0; i < eventcnt; ++i)	896	for (i = 0; i < eventcnt; ++i)
545	ev_feed_event (EV_A_ events [i], type);	897	ev_feed_event (EV_A_ events [i], type);
546	}	898	}
547		899
548	/*****************************************************************************/	900	/*****************************************************************************/
549		901
550	void inline_size	902	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)	903	fd_event_nocheck (EV_P_ int fd, int revents)
565	{	904	{
566	ANFD *anfd = anfds + fd;	905	ANFD *anfd = anfds + fd;
567	ev_io *w;	906	ev_io *w;
568		907
569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	908	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
573	if (ev)	912	if (ev)
574	ev_feed_event (EV_A_ (W)w, ev);	913	ev_feed_event (EV_A_ (W)w, ev);
575	}	914	}
576	}	915	}
577		916
		917	/* do not submit kernel events for fds that have reify set */
		918	/* because that means they changed while we were polling for new events */
		919	inline_speed void
		920	fd_event (EV_P_ int fd, int revents)
		921	{
		922	ANFD *anfd = anfds + fd;
		923
		924	if (expect_true (!anfd->reify))
		925	fd_event_nocheck (EV_A_ fd, revents);
		926	}
		927
578	void	928	void
579	ev_feed_fd_event (EV_P_ int fd, int revents)	929	ev_feed_fd_event (EV_P_ int fd, int revents)
580	{	930	{
581	if (fd >= 0 && fd < anfdmax)	931	if (fd >= 0 && fd < anfdmax)
582	fd_event (EV_A_ fd, revents);	932	fd_event_nocheck (EV_A_ fd, revents);
583	}	933	}
584		934
585	void inline_size	935	/* make sure the external fd watch events are in-sync */
		936	/* with the kernel/libev internal state */
		937	inline_size void
586	fd_reify (EV_P)	938	fd_reify (EV_P)
587	{	939	{
588	int i;	940	int i;
589		941
590	for (i = 0; i < fdchangecnt; ++i)	942	for (i = 0; i < fdchangecnt; ++i)
…		…
599	events |= (unsigned char)w->events;	951	events |= (unsigned char)w->events;
600		952
601	#if EV_SELECT_IS_WINSOCKET	953	#if EV_SELECT_IS_WINSOCKET
602	if (events)	954	if (events)
603	{	955	{
604	unsigned long argp;	956	unsigned long arg;
605	#ifdef EV_FD_TO_WIN32_HANDLE
606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	957	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
607	#else
608	anfd->handle = _get_osfhandle (fd);
609	#endif
610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	958	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
611	}	959	}
612	#endif	960	#endif
613		961
614	{	962	{
615	unsigned char o_events = anfd->events;	963	unsigned char o_events = anfd->events;
616	unsigned char o_reify = anfd->reify;	964	unsigned char o_reify = anfd->reify;
617		965
618	anfd->reify = 0;	966	anfd->reify = 0;
619	anfd->events = events;	967	anfd->events = events;
620		968
621	if (o_events != events || o_reify & EV_IOFDSET)	969	if (o_events != events || o_reify & EV__IOFDSET)
622	backend_modify (EV_A_ fd, o_events, events);	970	backend_modify (EV_A_ fd, o_events, events);
623	}	971	}
624	}	972	}
625		973
626	fdchangecnt = 0;	974	fdchangecnt = 0;
627	}	975	}
628		976
629	void inline_size	977	/* something about the given fd changed */
		978	inline_size void
630	fd_change (EV_P_ int fd, int flags)	979	fd_change (EV_P_ int fd, int flags)
631	{	980	{
632	unsigned char reify = anfds [fd].reify;	981	unsigned char reify = anfds [fd].reify;
633	anfds [fd].reify |= flags;	982	anfds [fd].reify |= flags;
634		983
…		…
638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	987	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
639	fdchanges [fdchangecnt - 1] = fd;	988	fdchanges [fdchangecnt - 1] = fd;
640	}	989	}
641	}	990	}
642		991
643	void inline_speed	992	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		993	inline_speed void
644	fd_kill (EV_P_ int fd)	994	fd_kill (EV_P_ int fd)
645	{	995	{
646	ev_io *w;	996	ev_io *w;
647		997
648	while ((w = (ev_io *)anfds [fd].head))	998	while ((w = (ev_io *)anfds [fd].head))
…		…
650	ev_io_stop (EV_A_ w);	1000	ev_io_stop (EV_A_ w);
651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1001	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652	}	1002	}
653	}	1003	}
654		1004
655	int inline_size	1005	/* check whether the given fd is actually valid, for error recovery */
		1006	inline_size int
656	fd_valid (int fd)	1007	fd_valid (int fd)
657	{	1008	{
658	#ifdef _WIN32	1009	#ifdef _WIN32
659	return _get_osfhandle (fd) != -1;	1010	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
660	#else	1011	#else
661	return fcntl (fd, F_GETFD) != -1;	1012	return fcntl (fd, F_GETFD) != -1;
662	#endif	1013	#endif
663	}	1014	}
664		1015
…		…
668	{	1019	{
669	int fd;	1020	int fd;
670		1021
671	for (fd = 0; fd < anfdmax; ++fd)	1022	for (fd = 0; fd < anfdmax; ++fd)
672	if (anfds [fd].events)	1023	if (anfds [fd].events)
673	if (!fd_valid (fd) == -1 && errno == EBADF)	1024	if (!fd_valid (fd) && errno == EBADF)
674	fd_kill (EV_A_ fd);	1025	fd_kill (EV_A_ fd);
675	}	1026	}
676		1027
677	/* called on ENOMEM in select/poll to kill some fds and retry */	1028	/* called on ENOMEM in select/poll to kill some fds and retry */
678	static void noinline	1029	static void noinline
…		…
682		1033
683	for (fd = anfdmax; fd--; )	1034	for (fd = anfdmax; fd--; )
684	if (anfds [fd].events)	1035	if (anfds [fd].events)
685	{	1036	{
686	fd_kill (EV_A_ fd);	1037	fd_kill (EV_A_ fd);
687	return;	1038	break;
688	}	1039	}
689	}	1040	}
690		1041
691	/* usually called after fork if backend needs to re-arm all fds from scratch */	1042	/* usually called after fork if backend needs to re-arm all fds from scratch */
692	static void noinline	1043	static void noinline
…		…
696		1047
697	for (fd = 0; fd < anfdmax; ++fd)	1048	for (fd = 0; fd < anfdmax; ++fd)
698	if (anfds [fd].events)	1049	if (anfds [fd].events)
699	{	1050	{
700	anfds [fd].events = 0;	1051	anfds [fd].events = 0;
		1052	anfds [fd].emask = 0;
701	fd_change (EV_A_ fd, EV_IOFDSET | 1);	1053	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
702	}	1054	}
703	}	1055	}
704		1056
705	/*****************************************************************************/	1057	/* used to prepare libev internal fd's */
706		1058	/* this is not fork-safe */
707	void inline_speed	1059	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	sig_atomic_t volatile gotsig;
769	} ANSIG;
770
771	static ANSIG *signals;
772	static int signalmax;
773
774	static int sigpipe [2];
775	static sig_atomic_t volatile gotsig;
776	static ev_io sigev;
777
778	void inline_size
779	signals_init (ANSIG *base, int count)
780	{
781	while (count--)
782	{
783	base->head = 0;
784	base->gotsig = 0;
785
786	++base;
787	}
788	}
789
790	static void
791	sighandler (int signum)
792	{
793	#if _WIN32
794	signal (signum, sighandler);
795	#endif
796
797	signals [signum - 1].gotsig = 1;
798
799	if (!gotsig)
800	{
801	int old_errno = errno;
802	gotsig = 1;
803	write (sigpipe [1], &signum, 1);
804	errno = old_errno;
805	}
806	}
807
808	void noinline
809	ev_feed_signal_event (EV_P_ int signum)
810	{
811	WL w;
812
813	#if EV_MULTIPLICITY
814	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
815	#endif
816
817	--signum;
818
819	if (signum < 0 || signum >= signalmax)
820	return;
821
822	signals [signum].gotsig = 0;
823
824	for (w = signals [signum].head; w; w = w->next)
825	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
826	}
827
828	static void
829	sigcb (EV_P_ ev_io *iow, int revents)
830	{
831	int signum;
832
833	read (sigpipe [0], &revents, 1);
834	gotsig = 0;
835
836	for (signum = signalmax; signum--; )
837	if (signals [signum].gotsig)
838	ev_feed_signal_event (EV_A_ signum + 1);
839	}
840
841	void inline_speed
842	fd_intern (int fd)	1060	fd_intern (int fd)
843	{	1061	{
844	#ifdef _WIN32	1062	#ifdef _WIN32
845	int arg = 1;	1063	unsigned long arg = 1;
846	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1064	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
847	#else	1065	#else
848	fcntl (fd, F_SETFD, FD_CLOEXEC);	1066	fcntl (fd, F_SETFD, FD_CLOEXEC);
849	fcntl (fd, F_SETFL, O_NONBLOCK);	1067	fcntl (fd, F_SETFL, O_NONBLOCK);
850	#endif	1068	#endif
851	}	1069	}
852		1070
		1071	/*****************************************************************************/
		1072
		1073	/*
		1074	* the heap functions want a real array index. array index 0 is guaranteed to not
		1075	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		1076	* the branching factor of the d-tree.
		1077	*/
		1078
		1079	/*
		1080	* at the moment we allow libev the luxury of two heaps,
		1081	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		1082	* which is more cache-efficient.
		1083	* the difference is about 5% with 50000+ watchers.
		1084	*/
		1085	#if EV_USE_4HEAP
		1086
		1087	#define DHEAP 4
		1088	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		1089	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		1090	#define UPHEAP_DONE(p,k) ((p) == (k))
		1091
		1092	/* away from the root */
		1093	inline_speed void
		1094	downheap (ANHE *heap, int N, int k)
		1095	{
		1096	ANHE he = heap [k];
		1097	ANHE *E = heap + N + HEAP0;
		1098
		1099	for (;;)
		1100	{
		1101	ev_tstamp minat;
		1102	ANHE *minpos;
		1103	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		1104
		1105	/* find minimum child */
		1106	if (expect_true (pos + DHEAP - 1 < E))
		1107	{
		1108	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1109	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1110	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1111	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1112	}
		1113	else if (pos < E)
		1114	{
		1115	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1116	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1117	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1118	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1119	}
		1120	else
		1121	break;
		1122
		1123	if (ANHE_at (he) <= minat)
		1124	break;
		1125
		1126	heap [k] = *minpos;
		1127	ev_active (ANHE_w (*minpos)) = k;
		1128
		1129	k = minpos - heap;
		1130	}
		1131
		1132	heap [k] = he;
		1133	ev_active (ANHE_w (he)) = k;
		1134	}
		1135
		1136	#else /* 4HEAP */
		1137
		1138	#define HEAP0 1
		1139	#define HPARENT(k) ((k) >> 1)
		1140	#define UPHEAP_DONE(p,k) (!(p))
		1141
		1142	/* away from the root */
		1143	inline_speed void
		1144	downheap (ANHE *heap, int N, int k)
		1145	{
		1146	ANHE he = heap [k];
		1147
		1148	for (;;)
		1149	{
		1150	int c = k << 1;
		1151
		1152	if (c >= N + HEAP0)
		1153	break;
		1154
		1155	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		1156	? 1 : 0;
		1157
		1158	if (ANHE_at (he) <= ANHE_at (heap [c]))
		1159	break;
		1160
		1161	heap [k] = heap [c];
		1162	ev_active (ANHE_w (heap [k])) = k;
		1163
		1164	k = c;
		1165	}
		1166
		1167	heap [k] = he;
		1168	ev_active (ANHE_w (he)) = k;
		1169	}
		1170	#endif
		1171
		1172	/* towards the root */
		1173	inline_speed void
		1174	upheap (ANHE *heap, int k)
		1175	{
		1176	ANHE he = heap [k];
		1177
		1178	for (;;)
		1179	{
		1180	int p = HPARENT (k);
		1181
		1182	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		1183	break;
		1184
		1185	heap [k] = heap [p];
		1186	ev_active (ANHE_w (heap [k])) = k;
		1187	k = p;
		1188	}
		1189
		1190	heap [k] = he;
		1191	ev_active (ANHE_w (he)) = k;
		1192	}
		1193
		1194	/* move an element suitably so it is in a correct place */
		1195	inline_size void
		1196	adjustheap (ANHE *heap, int N, int k)
		1197	{
		1198	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
		1199	upheap (heap, k);
		1200	else
		1201	downheap (heap, N, k);
		1202	}
		1203
		1204	/* rebuild the heap: this function is used only once and executed rarely */
		1205	inline_size void
		1206	reheap (ANHE *heap, int N)
		1207	{
		1208	int i;
		1209
		1210	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		1211	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		1212	for (i = 0; i < N; ++i)
		1213	upheap (heap, i + HEAP0);
		1214	}
		1215
		1216	/*****************************************************************************/
		1217
		1218	/* associate signal watchers to a signal signal */
		1219	typedef struct
		1220	{
		1221	EV_ATOMIC_T pending;
		1222	#if EV_MULTIPLICITY
		1223	EV_P;
		1224	#endif
		1225	WL head;
		1226	} ANSIG;
		1227
		1228	static ANSIG signals [EV_NSIG - 1];
		1229
		1230	/*****************************************************************************/
		1231
		1232	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		1233
853	static void noinline	1234	static void noinline
854	siginit (EV_P)	1235	evpipe_init (EV_P)
855	{	1236	{
		1237	if (!ev_is_active (&pipe_w))
		1238	{
		1239	# if EV_USE_EVENTFD
		1240	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1241	if (evfd < 0 && errno == EINVAL)
		1242	evfd = eventfd (0, 0);
		1243
		1244	if (evfd >= 0)
		1245	{
		1246	evpipe [0] = -1;
		1247	fd_intern (evfd); /* doing it twice doesn't hurt */
		1248	ev_io_set (&pipe_w, evfd, EV_READ);
		1249	}
		1250	else
		1251	# endif
		1252	{
		1253	while (pipe (evpipe))
		1254	ev_syserr ("(libev) error creating signal/async pipe");
		1255
856	fd_intern (sigpipe [0]);	1256	fd_intern (evpipe [0]);
857	fd_intern (sigpipe [1]);	1257	fd_intern (evpipe [1]);
		1258	ev_io_set (&pipe_w, evpipe [0], EV_READ);
		1259	}
858		1260
859	ev_io_set (&sigev, sigpipe [0], EV_READ);
860	ev_io_start (EV_A_ &sigev);	1261	ev_io_start (EV_A_ &pipe_w);
861	ev_unref (EV_A); /* child watcher should not keep loop alive */	1262	ev_unref (EV_A); /* watcher should not keep loop alive */
		1263	}
		1264	}
		1265
		1266	inline_size void
		1267	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1268	{
		1269	if (!*flag)
		1270	{
		1271	int old_errno = errno; /* save errno because write might clobber it */
		1272	char dummy;
		1273
		1274	*flag = 1;
		1275
		1276	#if EV_USE_EVENTFD
		1277	if (evfd >= 0)
		1278	{
		1279	uint64_t counter = 1;
		1280	write (evfd, &counter, sizeof (uint64_t));
		1281	}
		1282	else
		1283	#endif
		1284	/* win32 people keep sending patches that change this write() to send() */
		1285	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1286	/* so when you think this write should be a send instead, please find out */
		1287	/* where your send() is from - it's definitely not the microsoft send, and */
		1288	/* tell me. thank you. */
		1289	write (evpipe [1], &dummy, 1);
		1290
		1291	errno = old_errno;
		1292	}
		1293	}
		1294
		1295	/* called whenever the libev signal pipe */
		1296	/* got some events (signal, async) */
		1297	static void
		1298	pipecb (EV_P_ ev_io *iow, int revents)
		1299	{
		1300	int i;
		1301
		1302	#if EV_USE_EVENTFD
		1303	if (evfd >= 0)
		1304	{
		1305	uint64_t counter;
		1306	read (evfd, &counter, sizeof (uint64_t));
		1307	}
		1308	else
		1309	#endif
		1310	{
		1311	char dummy;
		1312	/* see discussion in evpipe_write when you think this read should be recv in win32 */
		1313	read (evpipe [0], &dummy, 1);
		1314	}
		1315
		1316	if (sig_pending)
		1317	{
		1318	sig_pending = 0;
		1319
		1320	for (i = EV_NSIG - 1; i--; )
		1321	if (expect_false (signals [i].pending))
		1322	ev_feed_signal_event (EV_A_ i + 1);
		1323	}
		1324
		1325	#if EV_ASYNC_ENABLE
		1326	if (async_pending)
		1327	{
		1328	async_pending = 0;
		1329
		1330	for (i = asynccnt; i--; )
		1331	if (asyncs [i]->sent)
		1332	{
		1333	asyncs [i]->sent = 0;
		1334	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1335	}
		1336	}
		1337	#endif
862	}	1338	}
863		1339
864	/*****************************************************************************/	1340	/*****************************************************************************/
865		1341
		1342	static void
		1343	ev_sighandler (int signum)
		1344	{
		1345	#if EV_MULTIPLICITY
		1346	EV_P = signals [signum - 1].loop;
		1347	#endif
		1348
		1349	#ifdef _WIN32
		1350	signal (signum, ev_sighandler);
		1351	#endif
		1352
		1353	signals [signum - 1].pending = 1;
		1354	evpipe_write (EV_A_ &sig_pending);
		1355	}
		1356
		1357	void noinline
		1358	ev_feed_signal_event (EV_P_ int signum)
		1359	{
		1360	WL w;
		1361
		1362	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1363	return;
		1364
		1365	--signum;
		1366
		1367	#if EV_MULTIPLICITY
		1368	/* it is permissible to try to feed a signal to the wrong loop */
		1369	/* or, likely more useful, feeding a signal nobody is waiting for */
		1370
		1371	if (expect_false (signals [signum].loop != EV_A))
		1372	return;
		1373	#endif
		1374
		1375	signals [signum].pending = 0;
		1376
		1377	for (w = signals [signum].head; w; w = w->next)
		1378	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1379	}
		1380
		1381	#if EV_USE_SIGNALFD
		1382	static void
		1383	sigfdcb (EV_P_ ev_io *iow, int revents)
		1384	{
		1385	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1386
		1387	for (;;)
		1388	{
		1389	ssize_t res = read (sigfd, si, sizeof (si));
		1390
		1391	/* not ISO-C, as res might be -1, but works with SuS */
		1392	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1393	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1394
		1395	if (res < (ssize_t)sizeof (si))
		1396	break;
		1397	}
		1398	}
		1399	#endif
		1400
		1401	#endif
		1402
		1403	/*****************************************************************************/
		1404
		1405	#if EV_CHILD_ENABLE
866	static WL childs [EV_PID_HASHSIZE];	1406	static WL childs [EV_PID_HASHSIZE];
867		1407
868	#ifndef _WIN32
869
870	static ev_signal childev;	1408	static ev_signal childev;
871		1409
872	void inline_speed	1410	#ifndef WIFCONTINUED
		1411	# define WIFCONTINUED(status) 0
		1412	#endif
		1413
		1414	/* handle a single child status event */
		1415	inline_speed void
873	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1416	child_reap (EV_P_ int chain, int pid, int status)
874	{	1417	{
875	ev_child *w;	1418	ev_child *w;
		1419	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
876		1420
877	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1421	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		1422	{
878	if (w->pid == pid || !w->pid)	1423	if ((w->pid == pid || !w->pid)
		1424	&& (!traced || (w->flags & 1)))
879	{	1425	{
880	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */	1426	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
881	w->rpid = pid;	1427	w->rpid = pid;
882	w->rstatus = status;	1428	w->rstatus = status;
883	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1429	ev_feed_event (EV_A_ (W)w, EV_CHILD);
884	}	1430	}
		1431	}
885	}	1432	}
886		1433
887	#ifndef WCONTINUED	1434	#ifndef WCONTINUED
888	# define WCONTINUED 0	1435	# define WCONTINUED 0
889	#endif	1436	#endif
890		1437
		1438	/* called on sigchld etc., calls waitpid */
891	static void	1439	static void
892	childcb (EV_P_ ev_signal *sw, int revents)	1440	childcb (EV_P_ ev_signal *sw, int revents)
893	{	1441	{
894	int pid, status;	1442	int pid, status;
895		1443
…		…
898	if (!WCONTINUED	1446	if (!WCONTINUED
899	|| errno != EINVAL	1447	|| errno != EINVAL
900	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))	1448	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
901	return;	1449	return;
902		1450
903	/* make sure we are called again until all childs have been reaped */	1451	/* make sure we are called again until all children have been reaped */
904	/* we need to do it this way so that the callback gets called before we continue */	1452	/* we need to do it this way so that the callback gets called before we continue */
905	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1453	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
906		1454
907	child_reap (EV_A_ sw, pid, pid, status);	1455	child_reap (EV_A_ pid, pid, status);
908	if (EV_PID_HASHSIZE > 1)	1456	if ((EV_PID_HASHSIZE) > 1)
909	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1457	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
910	}	1458	}
911		1459
912	#endif	1460	#endif
913		1461
914	/*****************************************************************************/	1462	/*****************************************************************************/
…		…
976	/* kqueue is borked on everything but netbsd apparently */	1524	/* kqueue is borked on everything but netbsd apparently */
977	/* it usually doesn't work correctly on anything but sockets and pipes */	1525	/* it usually doesn't work correctly on anything but sockets and pipes */
978	flags &= ~EVBACKEND_KQUEUE;	1526	flags &= ~EVBACKEND_KQUEUE;
979	#endif	1527	#endif
980	#ifdef __APPLE__	1528	#ifdef __APPLE__
981	// flags &= ~EVBACKEND_KQUEUE; for documentation	1529	/* only select works correctly on that "unix-certified" platform */
982	flags &= ~EVBACKEND_POLL;	1530	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1531	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		1532	#endif
		1533	#ifdef __FreeBSD__
		1534	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
983	#endif	1535	#endif
984		1536
985	return flags;	1537	return flags;
986	}	1538	}
987		1539
…		…
1001	ev_backend (EV_P)	1553	ev_backend (EV_P)
1002	{	1554	{
1003	return backend;	1555	return backend;
1004	}	1556	}
1005		1557
		1558	#if EV_FEATURE_API
1006	unsigned int	1559	unsigned int
1007	ev_loop_count (EV_P)	1560	ev_iteration (EV_P)
1008	{	1561	{
1009	return loop_count;	1562	return loop_count;
1010	}	1563	}
1011		1564
		1565	unsigned int
		1566	ev_depth (EV_P)
		1567	{
		1568	return loop_depth;
		1569	}
		1570
1012	void	1571	void
1013	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1572	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1014	{	1573	{
1015	io_blocktime = interval;	1574	io_blocktime = interval;
1016	}	1575	}
…		…
1019	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1578	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1020	{	1579	{
1021	timeout_blocktime = interval;	1580	timeout_blocktime = interval;
1022	}	1581	}
1023		1582
		1583	void
		1584	ev_set_userdata (EV_P_ void *data)
		1585	{
		1586	userdata = data;
		1587	}
		1588
		1589	void *
		1590	ev_userdata (EV_P)
		1591	{
		1592	return userdata;
		1593	}
		1594
		1595	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1596	{
		1597	invoke_cb = invoke_pending_cb;
		1598	}
		1599
		1600	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1601	{
		1602	release_cb = release;
		1603	acquire_cb = acquire;
		1604	}
		1605	#endif
		1606
		1607	/* initialise a loop structure, must be zero-initialised */
1024	static void noinline	1608	static void noinline
1025	loop_init (EV_P_ unsigned int flags)	1609	loop_init (EV_P_ unsigned int flags)
1026	{	1610	{
1027	if (!backend)	1611	if (!backend)
1028	{	1612	{
		1613	#if EV_USE_REALTIME
		1614	if (!have_realtime)
		1615	{
		1616	struct timespec ts;
		1617
		1618	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1619	have_realtime = 1;
		1620	}
		1621	#endif
		1622
1029	#if EV_USE_MONOTONIC	1623	#if EV_USE_MONOTONIC
		1624	if (!have_monotonic)
1030	{	1625	{
1031	struct timespec ts;	1626	struct timespec ts;
		1627
1032	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1628	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1033	have_monotonic = 1;	1629	have_monotonic = 1;
1034	}	1630	}
1035	#endif	1631	#endif
1036
1037	ev_rt_now = ev_time ();
1038	mn_now = get_clock ();
1039	now_floor = mn_now;
1040	rtmn_diff = ev_rt_now - mn_now;
1041
1042	io_blocktime = 0.;
1043	timeout_blocktime = 0.;
1044		1632
1045	/* pid check not overridable via env */	1633	/* pid check not overridable via env */
1046	#ifndef _WIN32	1634	#ifndef _WIN32
1047	if (flags & EVFLAG_FORKCHECK)	1635	if (flags & EVFLAG_FORKCHECK)
1048	curpid = getpid ();	1636	curpid = getpid ();
…		…
1051	if (!(flags & EVFLAG_NOENV)	1639	if (!(flags & EVFLAG_NOENV)
1052	&& !enable_secure ()	1640	&& !enable_secure ()
1053	&& getenv ("LIBEV_FLAGS"))	1641	&& getenv ("LIBEV_FLAGS"))
1054	flags = atoi (getenv ("LIBEV_FLAGS"));	1642	flags = atoi (getenv ("LIBEV_FLAGS"));
1055		1643
		1644	ev_rt_now = ev_time ();
		1645	mn_now = get_clock ();
		1646	now_floor = mn_now;
		1647	rtmn_diff = ev_rt_now - mn_now;
		1648	#if EV_FEATURE_API
		1649	invoke_cb = ev_invoke_pending;
		1650	#endif
		1651
		1652	io_blocktime = 0.;
		1653	timeout_blocktime = 0.;
		1654	backend = 0;
		1655	backend_fd = -1;
		1656	sig_pending = 0;
		1657	#if EV_ASYNC_ENABLE
		1658	async_pending = 0;
		1659	#endif
		1660	#if EV_USE_INOTIFY
		1661	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
		1662	#endif
		1663	#if EV_USE_SIGNALFD
		1664	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
		1665	#endif
		1666
1056	if (!(flags & 0x0000ffffUL))	1667	if (!(flags & 0x0000ffffU))
1057	flags |= ev_recommended_backends ();	1668	flags |= ev_recommended_backends ();
1058
1059	backend = 0;
1060	backend_fd = -1;
1061	#if EV_USE_INOTIFY
1062	fs_fd = -2;
1063	#endif
1064		1669
1065	#if EV_USE_PORT	1670	#if EV_USE_PORT
1066	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1671	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1067	#endif	1672	#endif
1068	#if EV_USE_KQUEUE	1673	#if EV_USE_KQUEUE
…		…
1076	#endif	1681	#endif
1077	#if EV_USE_SELECT	1682	#if EV_USE_SELECT
1078	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1683	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1079	#endif	1684	#endif
1080		1685
		1686	ev_prepare_init (&pending_w, pendingcb);
		1687
		1688	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1081	ev_init (&sigev, sigcb);	1689	ev_init (&pipe_w, pipecb);
1082	ev_set_priority (&sigev, EV_MAXPRI);	1690	ev_set_priority (&pipe_w, EV_MAXPRI);
		1691	#endif
1083	}	1692	}
1084	}	1693	}
1085		1694
		1695	/* free up a loop structure */
1086	static void noinline	1696	static void noinline
1087	loop_destroy (EV_P)	1697	loop_destroy (EV_P)
1088	{	1698	{
1089	int i;	1699	int i;
		1700
		1701	if (ev_is_active (&pipe_w))
		1702	{
		1703	/*ev_ref (EV_A);*/
		1704	/*ev_io_stop (EV_A_ &pipe_w);*/
		1705
		1706	#if EV_USE_EVENTFD
		1707	if (evfd >= 0)
		1708	close (evfd);
		1709	#endif
		1710
		1711	if (evpipe [0] >= 0)
		1712	{
		1713	EV_WIN32_CLOSE_FD (evpipe [0]);
		1714	EV_WIN32_CLOSE_FD (evpipe [1]);
		1715	}
		1716	}
		1717
		1718	#if EV_USE_SIGNALFD
		1719	if (ev_is_active (&sigfd_w))
		1720	close (sigfd);
		1721	#endif
1090		1722
1091	#if EV_USE_INOTIFY	1723	#if EV_USE_INOTIFY
1092	if (fs_fd >= 0)	1724	if (fs_fd >= 0)
1093	close (fs_fd);	1725	close (fs_fd);
1094	#endif	1726	#endif
…		…
1118	#if EV_IDLE_ENABLE	1750	#if EV_IDLE_ENABLE
1119	array_free (idle, [i]);	1751	array_free (idle, [i]);
1120	#endif	1752	#endif
1121	}	1753	}
1122		1754
1123	ev_free (anfds); anfdmax = 0;	1755	ev_free (anfds); anfds = 0; anfdmax = 0;
1124		1756
1125	/* have to use the microsoft-never-gets-it-right macro */	1757	/* have to use the microsoft-never-gets-it-right macro */
		1758	array_free (rfeed, EMPTY);
1126	array_free (fdchange, EMPTY);	1759	array_free (fdchange, EMPTY);
1127	array_free (timer, EMPTY);	1760	array_free (timer, EMPTY);
1128	#if EV_PERIODIC_ENABLE	1761	#if EV_PERIODIC_ENABLE
1129	array_free (periodic, EMPTY);	1762	array_free (periodic, EMPTY);
1130	#endif	1763	#endif
1131	#if EV_FORK_ENABLE	1764	#if EV_FORK_ENABLE
1132	array_free (fork, EMPTY);	1765	array_free (fork, EMPTY);
1133	#endif	1766	#endif
1134	array_free (prepare, EMPTY);	1767	array_free (prepare, EMPTY);
1135	array_free (check, EMPTY);	1768	array_free (check, EMPTY);
		1769	#if EV_ASYNC_ENABLE
		1770	array_free (async, EMPTY);
		1771	#endif
1136		1772
1137	backend = 0;	1773	backend = 0;
1138	}	1774	}
1139		1775
		1776	#if EV_USE_INOTIFY
1140	void inline_size infy_fork (EV_P);	1777	inline_size void infy_fork (EV_P);
		1778	#endif
1141		1779
1142	void inline_size	1780	inline_size void
1143	loop_fork (EV_P)	1781	loop_fork (EV_P)
1144	{	1782	{
1145	#if EV_USE_PORT	1783	#if EV_USE_PORT
1146	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1784	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1147	#endif	1785	#endif
…		…
1153	#endif	1791	#endif
1154	#if EV_USE_INOTIFY	1792	#if EV_USE_INOTIFY
1155	infy_fork (EV_A);	1793	infy_fork (EV_A);
1156	#endif	1794	#endif
1157		1795
1158	if (ev_is_active (&sigev))	1796	if (ev_is_active (&pipe_w))
1159	{	1797	{
1160	/* default loop */	1798	/* this "locks" the handlers against writing to the pipe */
		1799	/* while we modify the fd vars */
		1800	sig_pending = 1;
		1801	#if EV_ASYNC_ENABLE
		1802	async_pending = 1;
		1803	#endif
1161		1804
1162	ev_ref (EV_A);	1805	ev_ref (EV_A);
1163	ev_io_stop (EV_A_ &sigev);	1806	ev_io_stop (EV_A_ &pipe_w);
1164	close (sigpipe [0]);
1165	close (sigpipe [1]);
1166		1807
1167	while (pipe (sigpipe))	1808	#if EV_USE_EVENTFD
1168	syserr ("(libev) error creating pipe");	1809	if (evfd >= 0)
		1810	close (evfd);
		1811	#endif
1169		1812
		1813	if (evpipe [0] >= 0)
		1814	{
		1815	EV_WIN32_CLOSE_FD (evpipe [0]);
		1816	EV_WIN32_CLOSE_FD (evpipe [1]);
		1817	}
		1818
		1819	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1170	siginit (EV_A);	1820	evpipe_init (EV_A);
		1821	/* now iterate over everything, in case we missed something */
1171	sigcb (EV_A_ &sigev, EV_READ);	1822	pipecb (EV_A_ &pipe_w, EV_READ);
		1823	#endif
1172	}	1824	}
1173		1825
1174	postfork = 0;	1826	postfork = 0;
1175	}	1827	}
1176		1828
1177	#if EV_MULTIPLICITY	1829	#if EV_MULTIPLICITY
		1830
1178	struct ev_loop *	1831	struct ev_loop *
1179	ev_loop_new (unsigned int flags)	1832	ev_loop_new (unsigned int flags)
1180	{	1833	{
1181	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1834	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1182		1835
1183	memset (loop, 0, sizeof (struct ev_loop));	1836	memset (EV_A, 0, sizeof (struct ev_loop));
1184
1185	loop_init (EV_A_ flags);	1837	loop_init (EV_A_ flags);
1186		1838
1187	if (ev_backend (EV_A))	1839	if (ev_backend (EV_A))
1188	return loop;	1840	return EV_A;
1189		1841
1190	return 0;	1842	return 0;
1191	}	1843	}
1192		1844
1193	void	1845	void
…		…
1200	void	1852	void
1201	ev_loop_fork (EV_P)	1853	ev_loop_fork (EV_P)
1202	{	1854	{
1203	postfork = 1; /* must be in line with ev_default_fork */	1855	postfork = 1; /* must be in line with ev_default_fork */
1204	}	1856	}
		1857	#endif /* multiplicity */
1205		1858
		1859	#if EV_VERIFY
		1860	static void noinline
		1861	verify_watcher (EV_P_ W w)
		1862	{
		1863	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1864
		1865	if (w->pending)
		1866	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1867	}
		1868
		1869	static void noinline
		1870	verify_heap (EV_P_ ANHE *heap, int N)
		1871	{
		1872	int i;
		1873
		1874	for (i = HEAP0; i < N + HEAP0; ++i)
		1875	{
		1876	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1877	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1878	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1879
		1880	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1881	}
		1882	}
		1883
		1884	static void noinline
		1885	array_verify (EV_P_ W *ws, int cnt)
		1886	{
		1887	while (cnt--)
		1888	{
		1889	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1890	verify_watcher (EV_A_ ws [cnt]);
		1891	}
		1892	}
		1893	#endif
		1894
		1895	#if EV_FEATURE_API
		1896	void
		1897	ev_verify (EV_P)
		1898	{
		1899	#if EV_VERIFY
		1900	int i;
		1901	WL w;
		1902
		1903	assert (activecnt >= -1);
		1904
		1905	assert (fdchangemax >= fdchangecnt);
		1906	for (i = 0; i < fdchangecnt; ++i)
		1907	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		1908
		1909	assert (anfdmax >= 0);
		1910	for (i = 0; i < anfdmax; ++i)
		1911	for (w = anfds [i].head; w; w = w->next)
		1912	{
		1913	verify_watcher (EV_A_ (W)w);
		1914	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
		1915	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1916	}
		1917
		1918	assert (timermax >= timercnt);
		1919	verify_heap (EV_A_ timers, timercnt);
		1920
		1921	#if EV_PERIODIC_ENABLE
		1922	assert (periodicmax >= periodiccnt);
		1923	verify_heap (EV_A_ periodics, periodiccnt);
		1924	#endif
		1925
		1926	for (i = NUMPRI; i--; )
		1927	{
		1928	assert (pendingmax [i] >= pendingcnt [i]);
		1929	#if EV_IDLE_ENABLE
		1930	assert (idleall >= 0);
		1931	assert (idlemax [i] >= idlecnt [i]);
		1932	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1933	#endif
		1934	}
		1935
		1936	#if EV_FORK_ENABLE
		1937	assert (forkmax >= forkcnt);
		1938	array_verify (EV_A_ (W *)forks, forkcnt);
		1939	#endif
		1940
		1941	#if EV_ASYNC_ENABLE
		1942	assert (asyncmax >= asynccnt);
		1943	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1944	#endif
		1945
		1946	#if EV_PREPARE_ENABLE
		1947	assert (preparemax >= preparecnt);
		1948	array_verify (EV_A_ (W *)prepares, preparecnt);
		1949	#endif
		1950
		1951	#if EV_CHECK_ENABLE
		1952	assert (checkmax >= checkcnt);
		1953	array_verify (EV_A_ (W *)checks, checkcnt);
		1954	#endif
		1955
		1956	# if 0
		1957	#if EV_CHILD_ENABLE
		1958	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		1959	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		1960	#endif
		1961	# endif
		1962	#endif
		1963	}
1206	#endif	1964	#endif
1207		1965
1208	#if EV_MULTIPLICITY	1966	#if EV_MULTIPLICITY
1209	struct ev_loop *	1967	struct ev_loop *
1210	ev_default_loop_init (unsigned int flags)	1968	ev_default_loop_init (unsigned int flags)
1211	#else	1969	#else
1212	int	1970	int
1213	ev_default_loop (unsigned int flags)	1971	ev_default_loop (unsigned int flags)
1214	#endif	1972	#endif
1215	{	1973	{
1216	if (sigpipe [0] == sigpipe [1])
1217	if (pipe (sigpipe))
1218	return 0;
1219
1220	if (!ev_default_loop_ptr)	1974	if (!ev_default_loop_ptr)
1221	{	1975	{
1222	#if EV_MULTIPLICITY	1976	#if EV_MULTIPLICITY
1223	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1977	EV_P = ev_default_loop_ptr = &default_loop_struct;
1224	#else	1978	#else
1225	ev_default_loop_ptr = 1;	1979	ev_default_loop_ptr = 1;
1226	#endif	1980	#endif
1227		1981
1228	loop_init (EV_A_ flags);	1982	loop_init (EV_A_ flags);
1229		1983
1230	if (ev_backend (EV_A))	1984	if (ev_backend (EV_A))
1231	{	1985	{
1232	siginit (EV_A);	1986	#if EV_CHILD_ENABLE
1233
1234	#ifndef _WIN32
1235	ev_signal_init (&childev, childcb, SIGCHLD);	1987	ev_signal_init (&childev, childcb, SIGCHLD);
1236	ev_set_priority (&childev, EV_MAXPRI);	1988	ev_set_priority (&childev, EV_MAXPRI);
1237	ev_signal_start (EV_A_ &childev);	1989	ev_signal_start (EV_A_ &childev);
1238	ev_unref (EV_A); /* child watcher should not keep loop alive */	1990	ev_unref (EV_A); /* child watcher should not keep loop alive */
1239	#endif	1991	#endif
…		…
1247		1999
1248	void	2000	void
1249	ev_default_destroy (void)	2001	ev_default_destroy (void)
1250	{	2002	{
1251	#if EV_MULTIPLICITY	2003	#if EV_MULTIPLICITY
1252	struct ev_loop *loop = ev_default_loop_ptr;	2004	EV_P = ev_default_loop_ptr;
1253	#endif	2005	#endif
1254		2006
1255	#ifndef _WIN32	2007	ev_default_loop_ptr = 0;
		2008
		2009	#if EV_CHILD_ENABLE
1256	ev_ref (EV_A); /* child watcher */	2010	ev_ref (EV_A); /* child watcher */
1257	ev_signal_stop (EV_A_ &childev);	2011	ev_signal_stop (EV_A_ &childev);
1258	#endif	2012	#endif
1259		2013
1260	ev_ref (EV_A); /* signal watcher */
1261	ev_io_stop (EV_A_ &sigev);
1262
1263	close (sigpipe [0]); sigpipe [0] = 0;
1264	close (sigpipe [1]); sigpipe [1] = 0;
1265
1266	loop_destroy (EV_A);	2014	loop_destroy (EV_A);
1267	}	2015	}
1268		2016
1269	void	2017	void
1270	ev_default_fork (void)	2018	ev_default_fork (void)
1271	{	2019	{
1272	#if EV_MULTIPLICITY	2020	#if EV_MULTIPLICITY
1273	struct ev_loop *loop = ev_default_loop_ptr;	2021	EV_P = ev_default_loop_ptr;
1274	#endif	2022	#endif
1275		2023
1276	if (backend)
1277	postfork = 1; /* must be in line with ev_loop_fork */	2024	postfork = 1; /* must be in line with ev_loop_fork */
1278	}	2025	}
1279		2026
1280	/*****************************************************************************/	2027	/*****************************************************************************/
1281		2028
1282	void	2029	void
1283	ev_invoke (EV_P_ void *w, int revents)	2030	ev_invoke (EV_P_ void *w, int revents)
1284	{	2031	{
1285	EV_CB_INVOKE ((W)w, revents);	2032	EV_CB_INVOKE ((W)w, revents);
1286	}	2033	}
1287		2034
1288	void inline_speed	2035	unsigned int
1289	call_pending (EV_P)	2036	ev_pending_count (EV_P)
		2037	{
		2038	int pri;
		2039	unsigned int count = 0;
		2040
		2041	for (pri = NUMPRI; pri--; )
		2042	count += pendingcnt [pri];
		2043
		2044	return count;
		2045	}
		2046
		2047	void noinline
		2048	ev_invoke_pending (EV_P)
1290	{	2049	{
1291	int pri;	2050	int pri;
1292		2051
1293	for (pri = NUMPRI; pri--; )	2052	for (pri = NUMPRI; pri--; )
1294	while (pendingcnt [pri])	2053	while (pendingcnt [pri])
1295	{	2054	{
1296	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2055	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1297		2056
1298	if (expect_true (p->w))
1299	{
1300	/*assert (("non-pending watcher on pending list", p->w->pending));*/	2057	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		2058	/* ^ this is no longer true, as pending_w could be here */
1301		2059
1302	p->w->pending = 0;	2060	p->w->pending = 0;
1303	EV_CB_INVOKE (p->w, p->events);	2061	EV_CB_INVOKE (p->w, p->events);
1304	}	2062	EV_FREQUENT_CHECK;
1305	}	2063	}
1306	}	2064	}
1307		2065
1308	void inline_size
1309	timers_reify (EV_P)
1310	{
1311	while (timercnt && ((WT)timers [0])->at <= mn_now)
1312	{
1313	ev_timer *w = (ev_timer *)timers [0];
1314
1315	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1316
1317	/* first reschedule or stop timer */
1318	if (w->repeat)
1319	{
1320	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1321
1322	((WT)w)->at += w->repeat;
1323	if (((WT)w)->at < mn_now)
1324	((WT)w)->at = mn_now;
1325
1326	downheap (timers, timercnt, 0);
1327	}
1328	else
1329	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1330
1331	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1332	}
1333	}
1334
1335	#if EV_PERIODIC_ENABLE
1336	void inline_size
1337	periodics_reify (EV_P)
1338	{
1339	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1340	{
1341	ev_periodic *w = (ev_periodic *)periodics [0];
1342
1343	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1344
1345	/* first reschedule or stop timer */
1346	if (w->reschedule_cb)
1347	{
1348	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1349	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1350	downheap (periodics, periodiccnt, 0);
1351	}
1352	else if (w->interval)
1353	{
1354	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1355	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1356	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1357	downheap (periodics, periodiccnt, 0);
1358	}
1359	else
1360	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1361
1362	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1363	}
1364	}
1365
1366	static void noinline
1367	periodics_reschedule (EV_P)
1368	{
1369	int i;
1370
1371	/* adjust periodics after time jump */
1372	for (i = 0; i < periodiccnt; ++i)
1373	{
1374	ev_periodic *w = (ev_periodic *)periodics [i];
1375
1376	if (w->reschedule_cb)
1377	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1378	else if (w->interval)
1379	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1380	}
1381
1382	/* now rebuild the heap */
1383	for (i = periodiccnt >> 1; i--; )
1384	downheap (periodics, periodiccnt, i);
1385	}
1386	#endif
1387
1388	#if EV_IDLE_ENABLE	2066	#if EV_IDLE_ENABLE
1389	void inline_size	2067	/* make idle watchers pending. this handles the "call-idle */
		2068	/* only when higher priorities are idle" logic */
		2069	inline_size void
1390	idle_reify (EV_P)	2070	idle_reify (EV_P)
1391	{	2071	{
1392	if (expect_false (idleall))	2072	if (expect_false (idleall))
1393	{	2073	{
1394	int pri;	2074	int pri;
…		…
1406	}	2086	}
1407	}	2087	}
1408	}	2088	}
1409	#endif	2089	#endif
1410		2090
1411	void inline_speed	2091	/* make timers pending */
		2092	inline_size void
		2093	timers_reify (EV_P)
		2094	{
		2095	EV_FREQUENT_CHECK;
		2096
		2097	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		2098	{
		2099	do
		2100	{
		2101	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		2102
		2103	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		2104
		2105	/* first reschedule or stop timer */
		2106	if (w->repeat)
		2107	{
		2108	ev_at (w) += w->repeat;
		2109	if (ev_at (w) < mn_now)
		2110	ev_at (w) = mn_now;
		2111
		2112	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		2113
		2114	ANHE_at_cache (timers [HEAP0]);
		2115	downheap (timers, timercnt, HEAP0);
		2116	}
		2117	else
		2118	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2119
		2120	EV_FREQUENT_CHECK;
		2121	feed_reverse (EV_A_ (W)w);
		2122	}
		2123	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
		2124
		2125	feed_reverse_done (EV_A_ EV_TIMER);
		2126	}
		2127	}
		2128
		2129	#if EV_PERIODIC_ENABLE
		2130	/* make periodics pending */
		2131	inline_size void
		2132	periodics_reify (EV_P)
		2133	{
		2134	EV_FREQUENT_CHECK;
		2135
		2136	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		2137	{
		2138	int feed_count = 0;
		2139
		2140	do
		2141	{
		2142	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2143
		2144	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		2145
		2146	/* first reschedule or stop timer */
		2147	if (w->reschedule_cb)
		2148	{
		2149	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2150
		2151	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		2152
		2153	ANHE_at_cache (periodics [HEAP0]);
		2154	downheap (periodics, periodiccnt, HEAP0);
		2155	}
		2156	else if (w->interval)
		2157	{
		2158	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2159	/* if next trigger time is not sufficiently in the future, put it there */
		2160	/* this might happen because of floating point inexactness */
		2161	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2162	{
		2163	ev_at (w) += w->interval;
		2164
		2165	/* if interval is unreasonably low we might still have a time in the past */
		2166	/* so correct this. this will make the periodic very inexact, but the user */
		2167	/* has effectively asked to get triggered more often than possible */
		2168	if (ev_at (w) < ev_rt_now)
		2169	ev_at (w) = ev_rt_now;
		2170	}
		2171
		2172	ANHE_at_cache (periodics [HEAP0]);
		2173	downheap (periodics, periodiccnt, HEAP0);
		2174	}
		2175	else
		2176	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2177
		2178	EV_FREQUENT_CHECK;
		2179	feed_reverse (EV_A_ (W)w);
		2180	}
		2181	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		2182
		2183	feed_reverse_done (EV_A_ EV_PERIODIC);
		2184	}
		2185	}
		2186
		2187	/* simply recalculate all periodics */
		2188	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		2189	static void noinline
		2190	periodics_reschedule (EV_P)
		2191	{
		2192	int i;
		2193
		2194	/* adjust periodics after time jump */
		2195	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		2196	{
		2197	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		2198
		2199	if (w->reschedule_cb)
		2200	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2201	else if (w->interval)
		2202	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2203
		2204	ANHE_at_cache (periodics [i]);
		2205	}
		2206
		2207	reheap (periodics, periodiccnt);
		2208	}
		2209	#endif
		2210
		2211	/* adjust all timers by a given offset */
		2212	static void noinline
		2213	timers_reschedule (EV_P_ ev_tstamp adjust)
		2214	{
		2215	int i;
		2216
		2217	for (i = 0; i < timercnt; ++i)
		2218	{
		2219	ANHE *he = timers + i + HEAP0;
		2220	ANHE_w (*he)->at += adjust;
		2221	ANHE_at_cache (*he);
		2222	}
		2223	}
		2224
		2225	/* fetch new monotonic and realtime times from the kernel */
		2226	/* also detect if there was a timejump, and act accordingly */
		2227	inline_speed void
1412	time_update (EV_P_ ev_tstamp max_block)	2228	time_update (EV_P_ ev_tstamp max_block)
1413	{	2229	{
1414	int i;
1415
1416	#if EV_USE_MONOTONIC	2230	#if EV_USE_MONOTONIC
1417	if (expect_true (have_monotonic))	2231	if (expect_true (have_monotonic))
1418	{	2232	{
		2233	int i;
1419	ev_tstamp odiff = rtmn_diff;	2234	ev_tstamp odiff = rtmn_diff;
1420		2235
1421	mn_now = get_clock ();	2236	mn_now = get_clock ();
1422		2237
1423	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2238	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1441	*/	2256	*/
1442	for (i = 4; --i; )	2257	for (i = 4; --i; )
1443	{	2258	{
1444	rtmn_diff = ev_rt_now - mn_now;	2259	rtmn_diff = ev_rt_now - mn_now;
1445		2260
1446	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	2261	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1447	return; /* all is well */	2262	return; /* all is well */
1448		2263
1449	ev_rt_now = ev_time ();	2264	ev_rt_now = ev_time ();
1450	mn_now = get_clock ();	2265	mn_now = get_clock ();
1451	now_floor = mn_now;	2266	now_floor = mn_now;
1452	}	2267	}
1453		2268
		2269	/* no timer adjustment, as the monotonic clock doesn't jump */
		2270	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1454	# if EV_PERIODIC_ENABLE	2271	# if EV_PERIODIC_ENABLE
1455	periodics_reschedule (EV_A);	2272	periodics_reschedule (EV_A);
1456	# endif	2273	# endif
1457	/* no timer adjustment, as the monotonic clock doesn't jump */
1458	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1459	}	2274	}
1460	else	2275	else
1461	#endif	2276	#endif
1462	{	2277	{
1463	ev_rt_now = ev_time ();	2278	ev_rt_now = ev_time ();
1464		2279
1465	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2280	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1466	{	2281	{
		2282	/* adjust timers. this is easy, as the offset is the same for all of them */
		2283	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1467	#if EV_PERIODIC_ENABLE	2284	#if EV_PERIODIC_ENABLE
1468	periodics_reschedule (EV_A);	2285	periodics_reschedule (EV_A);
1469	#endif	2286	#endif
1470	/* adjust timers. this is easy, as the offset is the same for all of them */
1471	for (i = 0; i < timercnt; ++i)
1472	((WT)timers [i])->at += ev_rt_now - mn_now;
1473	}	2287	}
1474		2288
1475	mn_now = ev_rt_now;	2289	mn_now = ev_rt_now;
1476	}	2290	}
1477	}	2291	}
1478		2292
1479	void	2293	void
1480	ev_ref (EV_P)
1481	{
1482	++activecnt;
1483	}
1484
1485	void
1486	ev_unref (EV_P)
1487	{
1488	--activecnt;
1489	}
1490
1491	static int loop_done;
1492
1493	void
1494	ev_loop (EV_P_ int flags)	2294	ev_loop (EV_P_ int flags)
1495	{	2295	{
1496	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	2296	#if EV_FEATURE_API
1497	? EVUNLOOP_ONE	2297	++loop_depth;
1498	: EVUNLOOP_CANCEL;	2298	#endif
1499		2299
		2300	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2301
		2302	loop_done = EVUNLOOP_CANCEL;
		2303
1500	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2304	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1501		2305
1502	do	2306	do
1503	{	2307	{
		2308	#if EV_VERIFY >= 2
		2309	ev_verify (EV_A);
		2310	#endif
		2311
1504	#ifndef _WIN32	2312	#ifndef _WIN32
1505	if (expect_false (curpid)) /* penalise the forking check even more */	2313	if (expect_false (curpid)) /* penalise the forking check even more */
1506	if (expect_false (getpid () != curpid))	2314	if (expect_false (getpid () != curpid))
1507	{	2315	{
1508	curpid = getpid ();	2316	curpid = getpid ();
…		…
1514	/* we might have forked, so queue fork handlers */	2322	/* we might have forked, so queue fork handlers */
1515	if (expect_false (postfork))	2323	if (expect_false (postfork))
1516	if (forkcnt)	2324	if (forkcnt)
1517	{	2325	{
1518	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2326	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1519	call_pending (EV_A);	2327	EV_INVOKE_PENDING;
1520	}	2328	}
1521	#endif	2329	#endif
1522		2330
		2331	#if EV_PREPARE_ENABLE
1523	/* queue prepare watchers (and execute them) */	2332	/* queue prepare watchers (and execute them) */
1524	if (expect_false (preparecnt))	2333	if (expect_false (preparecnt))
1525	{	2334	{
1526	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2335	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1527	call_pending (EV_A);	2336	EV_INVOKE_PENDING;
1528	}	2337	}
		2338	#endif
1529		2339
1530	if (expect_false (!activecnt))	2340	if (expect_false (loop_done))
1531	break;	2341	break;
1532		2342
1533	/* we might have forked, so reify kernel state if necessary */	2343	/* we might have forked, so reify kernel state if necessary */
1534	if (expect_false (postfork))	2344	if (expect_false (postfork))
1535	loop_fork (EV_A);	2345	loop_fork (EV_A);
…		…
1542	ev_tstamp waittime = 0.;	2352	ev_tstamp waittime = 0.;
1543	ev_tstamp sleeptime = 0.;	2353	ev_tstamp sleeptime = 0.;
1544		2354
1545	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2355	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1546	{	2356	{
		2357	/* remember old timestamp for io_blocktime calculation */
		2358	ev_tstamp prev_mn_now = mn_now;
		2359
1547	/* update time to cancel out callback processing overhead */	2360	/* update time to cancel out callback processing overhead */
1548	time_update (EV_A_ 1e100);	2361	time_update (EV_A_ 1e100);
1549		2362
1550	waittime = MAX_BLOCKTIME;	2363	waittime = MAX_BLOCKTIME;
1551		2364
1552	if (timercnt)	2365	if (timercnt)
1553	{	2366	{
1554	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	2367	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1555	if (waittime > to) waittime = to;	2368	if (waittime > to) waittime = to;
1556	}	2369	}
1557		2370
1558	#if EV_PERIODIC_ENABLE	2371	#if EV_PERIODIC_ENABLE
1559	if (periodiccnt)	2372	if (periodiccnt)
1560	{	2373	{
1561	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	2374	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1562	if (waittime > to) waittime = to;	2375	if (waittime > to) waittime = to;
1563	}	2376	}
1564	#endif	2377	#endif
1565		2378
		2379	/* don't let timeouts decrease the waittime below timeout_blocktime */
1566	if (expect_false (waittime < timeout_blocktime))	2380	if (expect_false (waittime < timeout_blocktime))
1567	waittime = timeout_blocktime;	2381	waittime = timeout_blocktime;
1568		2382
1569	sleeptime = waittime - backend_fudge;	2383	/* extra check because io_blocktime is commonly 0 */
1570
1571	if (expect_true (sleeptime > io_blocktime))	2384	if (expect_false (io_blocktime))
1572	sleeptime = io_blocktime;
1573
1574	if (sleeptime)
1575	{	2385	{
		2386	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2387
		2388	if (sleeptime > waittime - backend_fudge)
		2389	sleeptime = waittime - backend_fudge;
		2390
		2391	if (expect_true (sleeptime > 0.))
		2392	{
1576	ev_sleep (sleeptime);	2393	ev_sleep (sleeptime);
1577	waittime -= sleeptime;	2394	waittime -= sleeptime;
		2395	}
1578	}	2396	}
1579	}	2397	}
1580		2398
		2399	#if EV_FEATURE_API
1581	++loop_count;	2400	++loop_count;
		2401	#endif
		2402	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1582	backend_poll (EV_A_ waittime);	2403	backend_poll (EV_A_ waittime);
		2404	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1583		2405
1584	/* update ev_rt_now, do magic */	2406	/* update ev_rt_now, do magic */
1585	time_update (EV_A_ waittime + sleeptime);	2407	time_update (EV_A_ waittime + sleeptime);
1586	}	2408	}
1587		2409
…		…
1594	#if EV_IDLE_ENABLE	2416	#if EV_IDLE_ENABLE
1595	/* queue idle watchers unless other events are pending */	2417	/* queue idle watchers unless other events are pending */
1596	idle_reify (EV_A);	2418	idle_reify (EV_A);
1597	#endif	2419	#endif
1598		2420
		2421	#if EV_CHECK_ENABLE
1599	/* queue check watchers, to be executed first */	2422	/* queue check watchers, to be executed first */
1600	if (expect_false (checkcnt))	2423	if (expect_false (checkcnt))
1601	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2424	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2425	#endif
1602		2426
1603	call_pending (EV_A);	2427	EV_INVOKE_PENDING;
1604
1605	}	2428	}
1606	while (expect_true (activecnt && !loop_done));	2429	while (expect_true (
		2430	activecnt
		2431	&& !loop_done
		2432	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2433	));
1607		2434
1608	if (loop_done == EVUNLOOP_ONE)	2435	if (loop_done == EVUNLOOP_ONE)
1609	loop_done = EVUNLOOP_CANCEL;	2436	loop_done = EVUNLOOP_CANCEL;
		2437
		2438	#if EV_FEATURE_API
		2439	--loop_depth;
		2440	#endif
1610	}	2441	}
1611		2442
1612	void	2443	void
1613	ev_unloop (EV_P_ int how)	2444	ev_unloop (EV_P_ int how)
1614	{	2445	{
1615	loop_done = how;	2446	loop_done = how;
1616	}	2447	}
1617		2448
		2449	void
		2450	ev_ref (EV_P)
		2451	{
		2452	++activecnt;
		2453	}
		2454
		2455	void
		2456	ev_unref (EV_P)
		2457	{
		2458	--activecnt;
		2459	}
		2460
		2461	void
		2462	ev_now_update (EV_P)
		2463	{
		2464	time_update (EV_A_ 1e100);
		2465	}
		2466
		2467	void
		2468	ev_suspend (EV_P)
		2469	{
		2470	ev_now_update (EV_A);
		2471	}
		2472
		2473	void
		2474	ev_resume (EV_P)
		2475	{
		2476	ev_tstamp mn_prev = mn_now;
		2477
		2478	ev_now_update (EV_A);
		2479	timers_reschedule (EV_A_ mn_now - mn_prev);
		2480	#if EV_PERIODIC_ENABLE
		2481	/* TODO: really do this? */
		2482	periodics_reschedule (EV_A);
		2483	#endif
		2484	}
		2485
1618	/*****************************************************************************/	2486	/*****************************************************************************/
		2487	/* singly-linked list management, used when the expected list length is short */
1619		2488
1620	void inline_size	2489	inline_size void
1621	wlist_add (WL *head, WL elem)	2490	wlist_add (WL *head, WL elem)
1622	{	2491	{
1623	elem->next = *head;	2492	elem->next = *head;
1624	*head = elem;	2493	*head = elem;
1625	}	2494	}
1626		2495
1627	void inline_size	2496	inline_size void
1628	wlist_del (WL *head, WL elem)	2497	wlist_del (WL *head, WL elem)
1629	{	2498	{
1630	while (*head)	2499	while (*head)
1631	{	2500	{
1632	if (*head == elem)	2501	if (expect_true (*head == elem))
1633	{	2502	{
1634	*head = elem->next;	2503	*head = elem->next;
1635	return;	2504	break;
1636	}	2505	}
1637		2506
1638	head = &(*head)->next;	2507	head = &(*head)->next;
1639	}	2508	}
1640	}	2509	}
1641		2510
1642	void inline_speed	2511	/* internal, faster, version of ev_clear_pending */
		2512	inline_speed void
1643	clear_pending (EV_P_ W w)	2513	clear_pending (EV_P_ W w)
1644	{	2514	{
1645	if (w->pending)	2515	if (w->pending)
1646	{	2516	{
1647	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2517	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1648	w->pending = 0;	2518	w->pending = 0;
1649	}	2519	}
1650	}	2520	}
1651		2521
1652	int	2522	int
…		…
1656	int pending = w_->pending;	2526	int pending = w_->pending;
1657		2527
1658	if (expect_true (pending))	2528	if (expect_true (pending))
1659	{	2529	{
1660	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2530	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2531	p->w = (W)&pending_w;
1661	w_->pending = 0;	2532	w_->pending = 0;
1662	p->w = 0;
1663	return p->events;	2533	return p->events;
1664	}	2534	}
1665	else	2535	else
1666	return 0;	2536	return 0;
1667	}	2537	}
1668		2538
1669	void inline_size	2539	inline_size void
1670	pri_adjust (EV_P_ W w)	2540	pri_adjust (EV_P_ W w)
1671	{	2541	{
1672	int pri = w->priority;	2542	int pri = ev_priority (w);
1673	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2543	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1674	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2544	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1675	w->priority = pri;	2545	ev_set_priority (w, pri);
1676	}	2546	}
1677		2547
1678	void inline_speed	2548	inline_speed void
1679	ev_start (EV_P_ W w, int active)	2549	ev_start (EV_P_ W w, int active)
1680	{	2550	{
1681	pri_adjust (EV_A_ w);	2551	pri_adjust (EV_A_ w);
1682	w->active = active;	2552	w->active = active;
1683	ev_ref (EV_A);	2553	ev_ref (EV_A);
1684	}	2554	}
1685		2555
1686	void inline_size	2556	inline_size void
1687	ev_stop (EV_P_ W w)	2557	ev_stop (EV_P_ W w)
1688	{	2558	{
1689	ev_unref (EV_A);	2559	ev_unref (EV_A);
1690	w->active = 0;	2560	w->active = 0;
1691	}	2561	}
…		…
1698	int fd = w->fd;	2568	int fd = w->fd;
1699		2569
1700	if (expect_false (ev_is_active (w)))	2570	if (expect_false (ev_is_active (w)))
1701	return;	2571	return;
1702		2572
1703	assert (("ev_io_start called with negative fd", fd >= 0));	2573	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2574	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		2575
		2576	EV_FREQUENT_CHECK;
1704		2577
1705	ev_start (EV_A_ (W)w, 1);	2578	ev_start (EV_A_ (W)w, 1);
1706	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2579	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1707	wlist_add (&anfds[fd].head, (WL)w);	2580	wlist_add (&anfds[fd].head, (WL)w);
1708		2581
1709	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2582	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1710	w->events &= ~EV_IOFDSET;	2583	w->events &= ~EV__IOFDSET;
		2584
		2585	EV_FREQUENT_CHECK;
1711	}	2586	}
1712		2587
1713	void noinline	2588	void noinline
1714	ev_io_stop (EV_P_ ev_io *w)	2589	ev_io_stop (EV_P_ ev_io *w)
1715	{	2590	{
1716	clear_pending (EV_A_ (W)w);	2591	clear_pending (EV_A_ (W)w);
1717	if (expect_false (!ev_is_active (w)))	2592	if (expect_false (!ev_is_active (w)))
1718	return;	2593	return;
1719		2594
1720	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2595	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2596
		2597	EV_FREQUENT_CHECK;
1721		2598
1722	wlist_del (&anfds[w->fd].head, (WL)w);	2599	wlist_del (&anfds[w->fd].head, (WL)w);
1723	ev_stop (EV_A_ (W)w);	2600	ev_stop (EV_A_ (W)w);
1724		2601
1725	fd_change (EV_A_ w->fd, 1);	2602	fd_change (EV_A_ w->fd, 1);
		2603
		2604	EV_FREQUENT_CHECK;
1726	}	2605	}
1727		2606
1728	void noinline	2607	void noinline
1729	ev_timer_start (EV_P_ ev_timer *w)	2608	ev_timer_start (EV_P_ ev_timer *w)
1730	{	2609	{
1731	if (expect_false (ev_is_active (w)))	2610	if (expect_false (ev_is_active (w)))
1732	return;	2611	return;
1733		2612
1734	((WT)w)->at += mn_now;	2613	ev_at (w) += mn_now;
1735		2614
1736	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2615	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1737		2616
		2617	EV_FREQUENT_CHECK;
		2618
		2619	++timercnt;
1738	ev_start (EV_A_ (W)w, ++timercnt);	2620	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1739	array_needsize (WT, timers, timermax, timercnt, EMPTY2);	2621	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1740	timers [timercnt - 1] = (WT)w;	2622	ANHE_w (timers [ev_active (w)]) = (WT)w;
1741	upheap (timers, timercnt - 1);	2623	ANHE_at_cache (timers [ev_active (w)]);
		2624	upheap (timers, ev_active (w));
1742		2625
		2626	EV_FREQUENT_CHECK;
		2627
1743	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/	2628	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1744	}	2629	}
1745		2630
1746	void noinline	2631	void noinline
1747	ev_timer_stop (EV_P_ ev_timer *w)	2632	ev_timer_stop (EV_P_ ev_timer *w)
1748	{	2633	{
1749	clear_pending (EV_A_ (W)w);	2634	clear_pending (EV_A_ (W)w);
1750	if (expect_false (!ev_is_active (w)))	2635	if (expect_false (!ev_is_active (w)))
1751	return;	2636	return;
1752		2637
1753	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));	2638	EV_FREQUENT_CHECK;
1754		2639
1755	{	2640	{
1756	int active = ((W)w)->active;	2641	int active = ev_active (w);
1757		2642
		2643	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2644
		2645	--timercnt;
		2646
1758	if (expect_true (--active < --timercnt))	2647	if (expect_true (active < timercnt + HEAP0))
1759	{	2648	{
1760	timers [active] = timers [timercnt];	2649	timers [active] = timers [timercnt + HEAP0];
1761	adjustheap (timers, timercnt, active);	2650	adjustheap (timers, timercnt, active);
1762	}	2651	}
1763	}	2652	}
1764		2653
1765	((WT)w)->at -= mn_now;	2654	ev_at (w) -= mn_now;
1766		2655
1767	ev_stop (EV_A_ (W)w);	2656	ev_stop (EV_A_ (W)w);
		2657
		2658	EV_FREQUENT_CHECK;
1768	}	2659	}
1769		2660
1770	void noinline	2661	void noinline
1771	ev_timer_again (EV_P_ ev_timer *w)	2662	ev_timer_again (EV_P_ ev_timer *w)
1772	{	2663	{
		2664	EV_FREQUENT_CHECK;
		2665
1773	if (ev_is_active (w))	2666	if (ev_is_active (w))
1774	{	2667	{
1775	if (w->repeat)	2668	if (w->repeat)
1776	{	2669	{
1777	((WT)w)->at = mn_now + w->repeat;	2670	ev_at (w) = mn_now + w->repeat;
		2671	ANHE_at_cache (timers [ev_active (w)]);
1778	adjustheap (timers, timercnt, ((W)w)->active - 1);	2672	adjustheap (timers, timercnt, ev_active (w));
1779	}	2673	}
1780	else	2674	else
1781	ev_timer_stop (EV_A_ w);	2675	ev_timer_stop (EV_A_ w);
1782	}	2676	}
1783	else if (w->repeat)	2677	else if (w->repeat)
1784	{	2678	{
1785	w->at = w->repeat;	2679	ev_at (w) = w->repeat;
1786	ev_timer_start (EV_A_ w);	2680	ev_timer_start (EV_A_ w);
1787	}	2681	}
		2682
		2683	EV_FREQUENT_CHECK;
		2684	}
		2685
		2686	ev_tstamp
		2687	ev_timer_remaining (EV_P_ ev_timer *w)
		2688	{
		2689	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1788	}	2690	}
1789		2691
1790	#if EV_PERIODIC_ENABLE	2692	#if EV_PERIODIC_ENABLE
1791	void noinline	2693	void noinline
1792	ev_periodic_start (EV_P_ ev_periodic *w)	2694	ev_periodic_start (EV_P_ ev_periodic *w)
1793	{	2695	{
1794	if (expect_false (ev_is_active (w)))	2696	if (expect_false (ev_is_active (w)))
1795	return;	2697	return;
1796		2698
1797	if (w->reschedule_cb)	2699	if (w->reschedule_cb)
1798	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2700	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1799	else if (w->interval)	2701	else if (w->interval)
1800	{	2702	{
1801	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2703	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1802	/* this formula differs from the one in periodic_reify because we do not always round up */	2704	/* this formula differs from the one in periodic_reify because we do not always round up */
1803	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2705	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1804	}	2706	}
1805	else	2707	else
1806	((WT)w)->at = w->offset;	2708	ev_at (w) = w->offset;
1807		2709
		2710	EV_FREQUENT_CHECK;
		2711
		2712	++periodiccnt;
1808	ev_start (EV_A_ (W)w, ++periodiccnt);	2713	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1809	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);	2714	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1810	periodics [periodiccnt - 1] = (WT)w;	2715	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1811	upheap (periodics, periodiccnt - 1);	2716	ANHE_at_cache (periodics [ev_active (w)]);
		2717	upheap (periodics, ev_active (w));
1812		2718
		2719	EV_FREQUENT_CHECK;
		2720
1813	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2721	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1814	}	2722	}
1815		2723
1816	void noinline	2724	void noinline
1817	ev_periodic_stop (EV_P_ ev_periodic *w)	2725	ev_periodic_stop (EV_P_ ev_periodic *w)
1818	{	2726	{
1819	clear_pending (EV_A_ (W)w);	2727	clear_pending (EV_A_ (W)w);
1820	if (expect_false (!ev_is_active (w)))	2728	if (expect_false (!ev_is_active (w)))
1821	return;	2729	return;
1822		2730
1823	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));	2731	EV_FREQUENT_CHECK;
1824		2732
1825	{	2733	{
1826	int active = ((W)w)->active;	2734	int active = ev_active (w);
1827		2735
		2736	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2737
		2738	--periodiccnt;
		2739
1828	if (expect_true (--active < --periodiccnt))	2740	if (expect_true (active < periodiccnt + HEAP0))
1829	{	2741	{
1830	periodics [active] = periodics [periodiccnt];	2742	periodics [active] = periodics [periodiccnt + HEAP0];
1831	adjustheap (periodics, periodiccnt, active);	2743	adjustheap (periodics, periodiccnt, active);
1832	}	2744	}
1833	}	2745	}
1834		2746
1835	ev_stop (EV_A_ (W)w);	2747	ev_stop (EV_A_ (W)w);
		2748
		2749	EV_FREQUENT_CHECK;
1836	}	2750	}
1837		2751
1838	void noinline	2752	void noinline
1839	ev_periodic_again (EV_P_ ev_periodic *w)	2753	ev_periodic_again (EV_P_ ev_periodic *w)
1840	{	2754	{
…		…
1846		2760
1847	#ifndef SA_RESTART	2761	#ifndef SA_RESTART
1848	# define SA_RESTART 0	2762	# define SA_RESTART 0
1849	#endif	2763	#endif
1850		2764
		2765	#if EV_SIGNAL_ENABLE
		2766
1851	void noinline	2767	void noinline
1852	ev_signal_start (EV_P_ ev_signal *w)	2768	ev_signal_start (EV_P_ ev_signal *w)
1853	{	2769	{
1854	#if EV_MULTIPLICITY
1855	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1856	#endif
1857	if (expect_false (ev_is_active (w)))	2770	if (expect_false (ev_is_active (w)))
1858	return;	2771	return;
1859		2772
1860	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2773	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1861		2774
		2775	#if EV_MULTIPLICITY
		2776	assert (("libev: a signal must not be attached to two different loops",
		2777	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
		2778
		2779	signals [w->signum - 1].loop = EV_A;
		2780	#endif
		2781
		2782	EV_FREQUENT_CHECK;
		2783
		2784	#if EV_USE_SIGNALFD
		2785	if (sigfd == -2)
1862	{	2786	{
1863	#ifndef _WIN32	2787	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1864	sigset_t full, prev;	2788	if (sigfd < 0 && errno == EINVAL)
1865	sigfillset (&full);	2789	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1866	sigprocmask (SIG_SETMASK, &full, &prev);
1867	#endif
1868		2790
1869	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2791	if (sigfd >= 0)
		2792	{
		2793	fd_intern (sigfd); /* doing it twice will not hurt */
1870		2794
1871	#ifndef _WIN32	2795	sigemptyset (&sigfd_set);
1872	sigprocmask (SIG_SETMASK, &prev, 0);	2796
1873	#endif	2797	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2798	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2799	ev_io_start (EV_A_ &sigfd_w);
		2800	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2801	}
1874	}	2802	}
		2803
		2804	if (sigfd >= 0)
		2805	{
		2806	/* TODO: check .head */
		2807	sigaddset (&sigfd_set, w->signum);
		2808	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2809
		2810	signalfd (sigfd, &sigfd_set, 0);
		2811	}
		2812	#endif
1875		2813
1876	ev_start (EV_A_ (W)w, 1);	2814	ev_start (EV_A_ (W)w, 1);
1877	wlist_add (&signals [w->signum - 1].head, (WL)w);	2815	wlist_add (&signals [w->signum - 1].head, (WL)w);
1878		2816
1879	if (!((WL)w)->next)	2817	if (!((WL)w)->next)
		2818	# if EV_USE_SIGNALFD
		2819	if (sigfd < 0) /*TODO*/
		2820	# endif
1880	{	2821	{
1881	#if _WIN32	2822	# ifdef _WIN32
		2823	evpipe_init (EV_A);
		2824
1882	signal (w->signum, sighandler);	2825	signal (w->signum, ev_sighandler);
1883	#else	2826	# else
1884	struct sigaction sa;	2827	struct sigaction sa;
		2828
		2829	evpipe_init (EV_A);
		2830
1885	sa.sa_handler = sighandler;	2831	sa.sa_handler = ev_sighandler;
1886	sigfillset (&sa.sa_mask);	2832	sigfillset (&sa.sa_mask);
1887	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2833	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1888	sigaction (w->signum, &sa, 0);	2834	sigaction (w->signum, &sa, 0);
		2835
		2836	sigemptyset (&sa.sa_mask);
		2837	sigaddset (&sa.sa_mask, w->signum);
		2838	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
1889	#endif	2839	#endif
1890	}	2840	}
		2841
		2842	EV_FREQUENT_CHECK;
1891	}	2843	}
1892		2844
1893	void noinline	2845	void noinline
1894	ev_signal_stop (EV_P_ ev_signal *w)	2846	ev_signal_stop (EV_P_ ev_signal *w)
1895	{	2847	{
1896	clear_pending (EV_A_ (W)w);	2848	clear_pending (EV_A_ (W)w);
1897	if (expect_false (!ev_is_active (w)))	2849	if (expect_false (!ev_is_active (w)))
1898	return;	2850	return;
1899		2851
		2852	EV_FREQUENT_CHECK;
		2853
1900	wlist_del (&signals [w->signum - 1].head, (WL)w);	2854	wlist_del (&signals [w->signum - 1].head, (WL)w);
1901	ev_stop (EV_A_ (W)w);	2855	ev_stop (EV_A_ (W)w);
1902		2856
1903	if (!signals [w->signum - 1].head)	2857	if (!signals [w->signum - 1].head)
		2858	{
		2859	#if EV_MULTIPLICITY
		2860	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2861	#endif
		2862	#if EV_USE_SIGNALFD
		2863	if (sigfd >= 0)
		2864	{
		2865	sigset_t ss;
		2866
		2867	sigemptyset (&ss);
		2868	sigaddset (&ss, w->signum);
		2869	sigdelset (&sigfd_set, w->signum);
		2870
		2871	signalfd (sigfd, &sigfd_set, 0);
		2872	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2873	}
		2874	else
		2875	#endif
1904	signal (w->signum, SIG_DFL);	2876	signal (w->signum, SIG_DFL);
		2877	}
		2878
		2879	EV_FREQUENT_CHECK;
1905	}	2880	}
		2881
		2882	#endif
		2883
		2884	#if EV_CHILD_ENABLE
1906		2885
1907	void	2886	void
1908	ev_child_start (EV_P_ ev_child *w)	2887	ev_child_start (EV_P_ ev_child *w)
1909	{	2888	{
1910	#if EV_MULTIPLICITY	2889	#if EV_MULTIPLICITY
1911	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2890	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1912	#endif	2891	#endif
1913	if (expect_false (ev_is_active (w)))	2892	if (expect_false (ev_is_active (w)))
1914	return;	2893	return;
1915		2894
		2895	EV_FREQUENT_CHECK;
		2896
1916	ev_start (EV_A_ (W)w, 1);	2897	ev_start (EV_A_ (W)w, 1);
1917	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2898	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
		2899
		2900	EV_FREQUENT_CHECK;
1918	}	2901	}
1919		2902
1920	void	2903	void
1921	ev_child_stop (EV_P_ ev_child *w)	2904	ev_child_stop (EV_P_ ev_child *w)
1922	{	2905	{
1923	clear_pending (EV_A_ (W)w);	2906	clear_pending (EV_A_ (W)w);
1924	if (expect_false (!ev_is_active (w)))	2907	if (expect_false (!ev_is_active (w)))
1925	return;	2908	return;
1926		2909
		2910	EV_FREQUENT_CHECK;
		2911
1927	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2912	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1928	ev_stop (EV_A_ (W)w);	2913	ev_stop (EV_A_ (W)w);
		2914
		2915	EV_FREQUENT_CHECK;
1929	}	2916	}
		2917
		2918	#endif
1930		2919
1931	#if EV_STAT_ENABLE	2920	#if EV_STAT_ENABLE
1932		2921
1933	# ifdef _WIN32	2922	# ifdef _WIN32
1934	# undef lstat	2923	# undef lstat
1935	# define lstat(a,b) _stati64 (a,b)	2924	# define lstat(a,b) _stati64 (a,b)
1936	# endif	2925	# endif
1937		2926
1938	#define DEF_STAT_INTERVAL 5.0074891	2927	#define DEF_STAT_INTERVAL 5.0074891
		2928	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1939	#define MIN_STAT_INTERVAL 0.1074891	2929	#define MIN_STAT_INTERVAL 0.1074891
1940		2930
1941	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2931	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1942		2932
1943	#if EV_USE_INOTIFY	2933	#if EV_USE_INOTIFY
1944	# define EV_INOTIFY_BUFSIZE 8192	2934
		2935	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2936	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1945		2937
1946	static void noinline	2938	static void noinline
1947	infy_add (EV_P_ ev_stat *w)	2939	infy_add (EV_P_ ev_stat *w)
1948	{	2940	{
1949	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);	2941	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);
1950		2942
1951	if (w->wd < 0)	2943	if (w->wd >= 0)
		2944	{
		2945	struct statfs sfs;
		2946
		2947	/* now local changes will be tracked by inotify, but remote changes won't */
		2948	/* unless the filesystem is known to be local, we therefore still poll */
		2949	/* also do poll on <2.6.25, but with normal frequency */
		2950
		2951	if (!fs_2625)
		2952	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2953	else if (!statfs (w->path, &sfs)
		2954	&& (sfs.f_type == 0x1373 /* devfs */
		2955	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2956	|| sfs.f_type == 0x3153464a /* jfs */
		2957	|| sfs.f_type == 0x52654973 /* reiser3 */
		2958	|| sfs.f_type == 0x01021994 /* tempfs */
		2959	|| sfs.f_type == 0x58465342 /* xfs */))
		2960	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2961	else
		2962	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1952	{	2963	}
1953	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2964	else
		2965	{
		2966	/* can't use inotify, continue to stat */
		2967	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1954		2968
1955	/* monitor some parent directory for speedup hints */	2969	/* if path is not there, monitor some parent directory for speedup hints */
		2970	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		2971	/* but an efficiency issue only */
1956	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2972	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1957	{	2973	{
1958	char path [4096];	2974	char path [4096];
1959	strcpy (path, w->path);	2975	strcpy (path, w->path);
1960		2976
…		…
1963	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2979	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1964	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2980	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1965		2981
1966	char *pend = strrchr (path, '/');	2982	char *pend = strrchr (path, '/');
1967		2983
1968	if (!pend)	2984	if (!pend || pend == path)
1969	break; /* whoops, no '/', complain to your admin */	2985	break;
1970		2986
1971	*pend = 0;	2987	*pend = 0;
1972	w->wd = inotify_add_watch (fs_fd, path, mask);	2988	w->wd = inotify_add_watch (fs_fd, path, mask);
1973	}	2989	}
1974	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2990	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1975	}	2991	}
1976	}	2992	}
1977	else
1978	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1979		2993
1980	if (w->wd >= 0)	2994	if (w->wd >= 0)
1981	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2995	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		2996
		2997	/* now re-arm timer, if required */
		2998	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		2999	ev_timer_again (EV_A_ &w->timer);
		3000	if (ev_is_active (&w->timer)) ev_unref (EV_A);
1982	}	3001	}
1983		3002
1984	static void noinline	3003	static void noinline
1985	infy_del (EV_P_ ev_stat *w)	3004	infy_del (EV_P_ ev_stat *w)
1986	{	3005	{
…		…
1989		3008
1990	if (wd < 0)	3009	if (wd < 0)
1991	return;	3010	return;
1992		3011
1993	w->wd = -2;	3012	w->wd = -2;
1994	slot = wd & (EV_INOTIFY_HASHSIZE - 1);	3013	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1995	wlist_del (&fs_hash [slot].head, (WL)w);	3014	wlist_del (&fs_hash [slot].head, (WL)w);
1996		3015
1997	/* remove this watcher, if others are watching it, they will rearm */	3016	/* remove this watcher, if others are watching it, they will rearm */
1998	inotify_rm_watch (fs_fd, wd);	3017	inotify_rm_watch (fs_fd, wd);
1999	}	3018	}
2000		3019
2001	static void noinline	3020	static void noinline
2002	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	3021	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2003	{	3022	{
2004	if (slot < 0)	3023	if (slot < 0)
2005	/* overflow, need to check for all hahs slots */	3024	/* overflow, need to check for all hash slots */
2006	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3025	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2007	infy_wd (EV_A_ slot, wd, ev);	3026	infy_wd (EV_A_ slot, wd, ev);
2008	else	3027	else
2009	{	3028	{
2010	WL w_;	3029	WL w_;
2011		3030
2012	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )	3031	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2013	{	3032	{
2014	ev_stat *w = (ev_stat *)w_;	3033	ev_stat *w = (ev_stat *)w_;
2015	w_ = w_->next; /* lets us remove this watcher and all before it */	3034	w_ = w_->next; /* lets us remove this watcher and all before it */
2016		3035
2017	if (w->wd == wd || wd == -1)	3036	if (w->wd == wd || wd == -1)
2018	{	3037	{
2019	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	3038	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2020	{	3039	{
		3040	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2021	w->wd = -1;	3041	w->wd = -1;
2022	infy_add (EV_A_ w); /* re-add, no matter what */	3042	infy_add (EV_A_ w); /* re-add, no matter what */
2023	}	3043	}
2024		3044
2025	stat_timer_cb (EV_A_ &w->timer, 0);	3045	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2030		3050
2031	static void	3051	static void
2032	infy_cb (EV_P_ ev_io *w, int revents)	3052	infy_cb (EV_P_ ev_io *w, int revents)
2033	{	3053	{
2034	char buf [EV_INOTIFY_BUFSIZE];	3054	char buf [EV_INOTIFY_BUFSIZE];
2035	struct inotify_event *ev = (struct inotify_event *)buf;
2036	int ofs;	3055	int ofs;
2037	int len = read (fs_fd, buf, sizeof (buf));	3056	int len = read (fs_fd, buf, sizeof (buf));
2038		3057
2039	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3058	for (ofs = 0; ofs < len; )
		3059	{
		3060	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2040	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3061	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3062	ofs += sizeof (struct inotify_event) + ev->len;
		3063	}
2041	}	3064	}
2042		3065
2043	void inline_size	3066	inline_size unsigned int
		3067	ev_linux_version (void)
		3068	{
		3069	struct utsname buf;
		3070	unsigned int v;
		3071	int i;
		3072	char *p = buf.release;
		3073
		3074	if (uname (&buf))
		3075	return 0;
		3076
		3077	for (i = 3+1; --i; )
		3078	{
		3079	unsigned int c = 0;
		3080
		3081	for (;;)
		3082	{
		3083	if (*p >= '0' && *p <= '9')
		3084	c = c * 10 + *p++ - '0';
		3085	else
		3086	{
		3087	p += *p == '.';
		3088	break;
		3089	}
		3090	}
		3091
		3092	v = (v << 8) | c;
		3093	}
		3094
		3095	return v;
		3096	}
		3097
		3098	inline_size void
		3099	ev_check_2625 (EV_P)
		3100	{
		3101	/* kernels < 2.6.25 are borked
		3102	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		3103	*/
		3104	if (ev_linux_version () < 0x020619)
		3105	return;
		3106
		3107	fs_2625 = 1;
		3108	}
		3109
		3110	inline_size int
		3111	infy_newfd (void)
		3112	{
		3113	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3114	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3115	if (fd >= 0)
		3116	return fd;
		3117	#endif
		3118	return inotify_init ();
		3119	}
		3120
		3121	inline_size void
2044	infy_init (EV_P)	3122	infy_init (EV_P)
2045	{	3123	{
2046	if (fs_fd != -2)	3124	if (fs_fd != -2)
2047	return;	3125	return;
2048		3126
		3127	fs_fd = -1;
		3128
		3129	ev_check_2625 (EV_A);
		3130
2049	fs_fd = inotify_init ();	3131	fs_fd = infy_newfd ();
2050		3132
2051	if (fs_fd >= 0)	3133	if (fs_fd >= 0)
2052	{	3134	{
		3135	fd_intern (fs_fd);
2053	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3136	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2054	ev_set_priority (&fs_w, EV_MAXPRI);	3137	ev_set_priority (&fs_w, EV_MAXPRI);
2055	ev_io_start (EV_A_ &fs_w);	3138	ev_io_start (EV_A_ &fs_w);
		3139	ev_unref (EV_A);
2056	}	3140	}
2057	}	3141	}
2058		3142
2059	void inline_size	3143	inline_size void
2060	infy_fork (EV_P)	3144	infy_fork (EV_P)
2061	{	3145	{
2062	int slot;	3146	int slot;
2063		3147
2064	if (fs_fd < 0)	3148	if (fs_fd < 0)
2065	return;	3149	return;
2066		3150
		3151	ev_ref (EV_A);
		3152	ev_io_stop (EV_A_ &fs_w);
2067	close (fs_fd);	3153	close (fs_fd);
2068	fs_fd = inotify_init ();	3154	fs_fd = infy_newfd ();
2069		3155
		3156	if (fs_fd >= 0)
		3157	{
		3158	fd_intern (fs_fd);
		3159	ev_io_set (&fs_w, fs_fd, EV_READ);
		3160	ev_io_start (EV_A_ &fs_w);
		3161	ev_unref (EV_A);
		3162	}
		3163
2070	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3164	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2071	{	3165	{
2072	WL w_ = fs_hash [slot].head;	3166	WL w_ = fs_hash [slot].head;
2073	fs_hash [slot].head = 0;	3167	fs_hash [slot].head = 0;
2074		3168
2075	while (w_)	3169	while (w_)
…		…
2080	w->wd = -1;	3174	w->wd = -1;
2081		3175
2082	if (fs_fd >= 0)	3176	if (fs_fd >= 0)
2083	infy_add (EV_A_ w); /* re-add, no matter what */	3177	infy_add (EV_A_ w); /* re-add, no matter what */
2084	else	3178	else
		3179	{
		3180	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3181	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2085	ev_timer_start (EV_A_ &w->timer);	3182	ev_timer_again (EV_A_ &w->timer);
		3183	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3184	}
2086	}	3185	}
2087
2088	}	3186	}
2089	}	3187	}
2090		3188
		3189	#endif
		3190
		3191	#ifdef _WIN32
		3192	# define EV_LSTAT(p,b) _stati64 (p, b)
		3193	#else
		3194	# define EV_LSTAT(p,b) lstat (p, b)
2091	#endif	3195	#endif
2092		3196
2093	void	3197	void
2094	ev_stat_stat (EV_P_ ev_stat *w)	3198	ev_stat_stat (EV_P_ ev_stat *w)
2095	{	3199	{
…		…
2102	static void noinline	3206	static void noinline
2103	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3207	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2104	{	3208	{
2105	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3209	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2106		3210
2107	/* we copy this here each the time so that */	3211	ev_statdata prev = w->attr;
2108	/* prev has the old value when the callback gets invoked */
2109	w->prev = w->attr;
2110	ev_stat_stat (EV_A_ w);	3212	ev_stat_stat (EV_A_ w);
2111		3213
2112	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3214	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2113	if (	3215	if (
2114	w->prev.st_dev != w->attr.st_dev	3216	prev.st_dev != w->attr.st_dev
2115	|| w->prev.st_ino != w->attr.st_ino	3217	|| prev.st_ino != w->attr.st_ino
2116	|| w->prev.st_mode != w->attr.st_mode	3218	|| prev.st_mode != w->attr.st_mode
2117	|| w->prev.st_nlink != w->attr.st_nlink	3219	|| prev.st_nlink != w->attr.st_nlink
2118	|| w->prev.st_uid != w->attr.st_uid	3220	|| prev.st_uid != w->attr.st_uid
2119	|| w->prev.st_gid != w->attr.st_gid	3221	|| prev.st_gid != w->attr.st_gid
2120	|| w->prev.st_rdev != w->attr.st_rdev	3222	|| prev.st_rdev != w->attr.st_rdev
2121	|| w->prev.st_size != w->attr.st_size	3223	|| prev.st_size != w->attr.st_size
2122	|| w->prev.st_atime != w->attr.st_atime	3224	|| prev.st_atime != w->attr.st_atime
2123	|| w->prev.st_mtime != w->attr.st_mtime	3225	|| prev.st_mtime != w->attr.st_mtime
2124	|| w->prev.st_ctime != w->attr.st_ctime	3226	|| prev.st_ctime != w->attr.st_ctime
2125	) {	3227	) {
		3228	/* we only update w->prev on actual differences */
		3229	/* in case we test more often than invoke the callback, */
		3230	/* to ensure that prev is always different to attr */
		3231	w->prev = prev;
		3232
2126	#if EV_USE_INOTIFY	3233	#if EV_USE_INOTIFY
		3234	if (fs_fd >= 0)
		3235	{
2127	infy_del (EV_A_ w);	3236	infy_del (EV_A_ w);
2128	infy_add (EV_A_ w);	3237	infy_add (EV_A_ w);
2129	ev_stat_stat (EV_A_ w); /* avoid race... */	3238	ev_stat_stat (EV_A_ w); /* avoid race... */
		3239	}
2130	#endif	3240	#endif
2131		3241
2132	ev_feed_event (EV_A_ w, EV_STAT);	3242	ev_feed_event (EV_A_ w, EV_STAT);
2133	}	3243	}
2134	}	3244	}
…		…
2137	ev_stat_start (EV_P_ ev_stat *w)	3247	ev_stat_start (EV_P_ ev_stat *w)
2138	{	3248	{
2139	if (expect_false (ev_is_active (w)))	3249	if (expect_false (ev_is_active (w)))
2140	return;	3250	return;
2141		3251
2142	/* since we use memcmp, we need to clear any padding data etc. */
2143	memset (&w->prev, 0, sizeof (ev_statdata));
2144	memset (&w->attr, 0, sizeof (ev_statdata));
2145
2146	ev_stat_stat (EV_A_ w);	3252	ev_stat_stat (EV_A_ w);
2147		3253
		3254	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2148	if (w->interval < MIN_STAT_INTERVAL)	3255	w->interval = MIN_STAT_INTERVAL;
2149	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2150		3256
2151	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	3257	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2152	ev_set_priority (&w->timer, ev_priority (w));	3258	ev_set_priority (&w->timer, ev_priority (w));
2153		3259
2154	#if EV_USE_INOTIFY	3260	#if EV_USE_INOTIFY
2155	infy_init (EV_A);	3261	infy_init (EV_A);
2156		3262
2157	if (fs_fd >= 0)	3263	if (fs_fd >= 0)
2158	infy_add (EV_A_ w);	3264	infy_add (EV_A_ w);
2159	else	3265	else
2160	#endif	3266	#endif
		3267	{
2161	ev_timer_start (EV_A_ &w->timer);	3268	ev_timer_again (EV_A_ &w->timer);
		3269	ev_unref (EV_A);
		3270	}
2162		3271
2163	ev_start (EV_A_ (W)w, 1);	3272	ev_start (EV_A_ (W)w, 1);
		3273
		3274	EV_FREQUENT_CHECK;
2164	}	3275	}
2165		3276
2166	void	3277	void
2167	ev_stat_stop (EV_P_ ev_stat *w)	3278	ev_stat_stop (EV_P_ ev_stat *w)
2168	{	3279	{
2169	clear_pending (EV_A_ (W)w);	3280	clear_pending (EV_A_ (W)w);
2170	if (expect_false (!ev_is_active (w)))	3281	if (expect_false (!ev_is_active (w)))
2171	return;	3282	return;
2172		3283
		3284	EV_FREQUENT_CHECK;
		3285
2173	#if EV_USE_INOTIFY	3286	#if EV_USE_INOTIFY
2174	infy_del (EV_A_ w);	3287	infy_del (EV_A_ w);
2175	#endif	3288	#endif
		3289
		3290	if (ev_is_active (&w->timer))
		3291	{
		3292	ev_ref (EV_A);
2176	ev_timer_stop (EV_A_ &w->timer);	3293	ev_timer_stop (EV_A_ &w->timer);
		3294	}
2177		3295
2178	ev_stop (EV_A_ (W)w);	3296	ev_stop (EV_A_ (W)w);
		3297
		3298	EV_FREQUENT_CHECK;
2179	}	3299	}
2180	#endif	3300	#endif
2181		3301
2182	#if EV_IDLE_ENABLE	3302	#if EV_IDLE_ENABLE
2183	void	3303	void
…		…
2185	{	3305	{
2186	if (expect_false (ev_is_active (w)))	3306	if (expect_false (ev_is_active (w)))
2187	return;	3307	return;
2188		3308
2189	pri_adjust (EV_A_ (W)w);	3309	pri_adjust (EV_A_ (W)w);
		3310
		3311	EV_FREQUENT_CHECK;
2190		3312
2191	{	3313	{
2192	int active = ++idlecnt [ABSPRI (w)];	3314	int active = ++idlecnt [ABSPRI (w)];
2193		3315
2194	++idleall;	3316	++idleall;
2195	ev_start (EV_A_ (W)w, active);	3317	ev_start (EV_A_ (W)w, active);
2196		3318
2197	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);	3319	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2198	idles [ABSPRI (w)][active - 1] = w;	3320	idles [ABSPRI (w)][active - 1] = w;
2199	}	3321	}
		3322
		3323	EV_FREQUENT_CHECK;
2200	}	3324	}
2201		3325
2202	void	3326	void
2203	ev_idle_stop (EV_P_ ev_idle *w)	3327	ev_idle_stop (EV_P_ ev_idle *w)
2204	{	3328	{
2205	clear_pending (EV_A_ (W)w);	3329	clear_pending (EV_A_ (W)w);
2206	if (expect_false (!ev_is_active (w)))	3330	if (expect_false (!ev_is_active (w)))
2207	return;	3331	return;
2208		3332
		3333	EV_FREQUENT_CHECK;
		3334
2209	{	3335	{
2210	int active = ((W)w)->active;	3336	int active = ev_active (w);
2211		3337
2212	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	3338	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2213	((W)idles [ABSPRI (w)][active - 1])->active = active;	3339	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2214		3340
2215	ev_stop (EV_A_ (W)w);	3341	ev_stop (EV_A_ (W)w);
2216	--idleall;	3342	--idleall;
2217	}	3343	}
2218	}
2219	#endif
2220		3344
		3345	EV_FREQUENT_CHECK;
		3346	}
		3347	#endif
		3348
		3349	#if EV_PREPARE_ENABLE
2221	void	3350	void
2222	ev_prepare_start (EV_P_ ev_prepare *w)	3351	ev_prepare_start (EV_P_ ev_prepare *w)
2223	{	3352	{
2224	if (expect_false (ev_is_active (w)))	3353	if (expect_false (ev_is_active (w)))
2225	return;	3354	return;
		3355
		3356	EV_FREQUENT_CHECK;
2226		3357
2227	ev_start (EV_A_ (W)w, ++preparecnt);	3358	ev_start (EV_A_ (W)w, ++preparecnt);
2228	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);	3359	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2229	prepares [preparecnt - 1] = w;	3360	prepares [preparecnt - 1] = w;
		3361
		3362	EV_FREQUENT_CHECK;
2230	}	3363	}
2231		3364
2232	void	3365	void
2233	ev_prepare_stop (EV_P_ ev_prepare *w)	3366	ev_prepare_stop (EV_P_ ev_prepare *w)
2234	{	3367	{
2235	clear_pending (EV_A_ (W)w);	3368	clear_pending (EV_A_ (W)w);
2236	if (expect_false (!ev_is_active (w)))	3369	if (expect_false (!ev_is_active (w)))
2237	return;	3370	return;
2238		3371
		3372	EV_FREQUENT_CHECK;
		3373
2239	{	3374	{
2240	int active = ((W)w)->active;	3375	int active = ev_active (w);
		3376
2241	prepares [active - 1] = prepares [--preparecnt];	3377	prepares [active - 1] = prepares [--preparecnt];
2242	((W)prepares [active - 1])->active = active;	3378	ev_active (prepares [active - 1]) = active;
2243	}	3379	}
2244		3380
2245	ev_stop (EV_A_ (W)w);	3381	ev_stop (EV_A_ (W)w);
2246	}
2247		3382
		3383	EV_FREQUENT_CHECK;
		3384	}
		3385	#endif
		3386
		3387	#if EV_CHECK_ENABLE
2248	void	3388	void
2249	ev_check_start (EV_P_ ev_check *w)	3389	ev_check_start (EV_P_ ev_check *w)
2250	{	3390	{
2251	if (expect_false (ev_is_active (w)))	3391	if (expect_false (ev_is_active (w)))
2252	return;	3392	return;
		3393
		3394	EV_FREQUENT_CHECK;
2253		3395
2254	ev_start (EV_A_ (W)w, ++checkcnt);	3396	ev_start (EV_A_ (W)w, ++checkcnt);
2255	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);	3397	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2256	checks [checkcnt - 1] = w;	3398	checks [checkcnt - 1] = w;
		3399
		3400	EV_FREQUENT_CHECK;
2257	}	3401	}
2258		3402
2259	void	3403	void
2260	ev_check_stop (EV_P_ ev_check *w)	3404	ev_check_stop (EV_P_ ev_check *w)
2261	{	3405	{
2262	clear_pending (EV_A_ (W)w);	3406	clear_pending (EV_A_ (W)w);
2263	if (expect_false (!ev_is_active (w)))	3407	if (expect_false (!ev_is_active (w)))
2264	return;	3408	return;
2265		3409
		3410	EV_FREQUENT_CHECK;
		3411
2266	{	3412	{
2267	int active = ((W)w)->active;	3413	int active = ev_active (w);
		3414
2268	checks [active - 1] = checks [--checkcnt];	3415	checks [active - 1] = checks [--checkcnt];
2269	((W)checks [active - 1])->active = active;	3416	ev_active (checks [active - 1]) = active;
2270	}	3417	}
2271		3418
2272	ev_stop (EV_A_ (W)w);	3419	ev_stop (EV_A_ (W)w);
		3420
		3421	EV_FREQUENT_CHECK;
2273	}	3422	}
		3423	#endif
2274		3424
2275	#if EV_EMBED_ENABLE	3425	#if EV_EMBED_ENABLE
2276	void noinline	3426	void noinline
2277	ev_embed_sweep (EV_P_ ev_embed *w)	3427	ev_embed_sweep (EV_P_ ev_embed *w)
2278	{	3428	{
…		…
2294	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3444	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2295	{	3445	{
2296	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3446	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2297		3447
2298	{	3448	{
2299	struct ev_loop *loop = w->other;	3449	EV_P = w->other;
2300		3450
2301	while (fdchangecnt)	3451	while (fdchangecnt)
2302	{	3452	{
2303	fd_reify (EV_A);	3453	fd_reify (EV_A);
2304	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3454	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2305	}	3455	}
2306	}	3456	}
2307	}	3457	}
2308		3458
		3459	static void
		3460	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3461	{
		3462	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3463
		3464	ev_embed_stop (EV_A_ w);
		3465
		3466	{
		3467	EV_P = w->other;
		3468
		3469	ev_loop_fork (EV_A);
		3470	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		3471	}
		3472
		3473	ev_embed_start (EV_A_ w);
		3474	}
		3475
2309	#if 0	3476	#if 0
2310	static void	3477	static void
2311	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3478	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2312	{	3479	{
2313	ev_idle_stop (EV_A_ idle);	3480	ev_idle_stop (EV_A_ idle);
…		…
2319	{	3486	{
2320	if (expect_false (ev_is_active (w)))	3487	if (expect_false (ev_is_active (w)))
2321	return;	3488	return;
2322		3489
2323	{	3490	{
2324	struct ev_loop *loop = w->other;	3491	EV_P = w->other;
2325	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3492	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2326	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3493	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2327	}	3494	}
		3495
		3496	EV_FREQUENT_CHECK;
2328		3497
2329	ev_set_priority (&w->io, ev_priority (w));	3498	ev_set_priority (&w->io, ev_priority (w));
2330	ev_io_start (EV_A_ &w->io);	3499	ev_io_start (EV_A_ &w->io);
2331		3500
2332	ev_prepare_init (&w->prepare, embed_prepare_cb);	3501	ev_prepare_init (&w->prepare, embed_prepare_cb);
2333	ev_set_priority (&w->prepare, EV_MINPRI);	3502	ev_set_priority (&w->prepare, EV_MINPRI);
2334	ev_prepare_start (EV_A_ &w->prepare);	3503	ev_prepare_start (EV_A_ &w->prepare);
2335		3504
		3505	ev_fork_init (&w->fork, embed_fork_cb);
		3506	ev_fork_start (EV_A_ &w->fork);
		3507
2336	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	3508	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2337		3509
2338	ev_start (EV_A_ (W)w, 1);	3510	ev_start (EV_A_ (W)w, 1);
		3511
		3512	EV_FREQUENT_CHECK;
2339	}	3513	}
2340		3514
2341	void	3515	void
2342	ev_embed_stop (EV_P_ ev_embed *w)	3516	ev_embed_stop (EV_P_ ev_embed *w)
2343	{	3517	{
2344	clear_pending (EV_A_ (W)w);	3518	clear_pending (EV_A_ (W)w);
2345	if (expect_false (!ev_is_active (w)))	3519	if (expect_false (!ev_is_active (w)))
2346	return;	3520	return;
2347		3521
		3522	EV_FREQUENT_CHECK;
		3523
2348	ev_io_stop (EV_A_ &w->io);	3524	ev_io_stop (EV_A_ &w->io);
2349	ev_prepare_stop (EV_A_ &w->prepare);	3525	ev_prepare_stop (EV_A_ &w->prepare);
		3526	ev_fork_stop (EV_A_ &w->fork);
2350		3527
2351	ev_stop (EV_A_ (W)w);	3528	ev_stop (EV_A_ (W)w);
		3529
		3530	EV_FREQUENT_CHECK;
2352	}	3531	}
2353	#endif	3532	#endif
2354		3533
2355	#if EV_FORK_ENABLE	3534	#if EV_FORK_ENABLE
2356	void	3535	void
2357	ev_fork_start (EV_P_ ev_fork *w)	3536	ev_fork_start (EV_P_ ev_fork *w)
2358	{	3537	{
2359	if (expect_false (ev_is_active (w)))	3538	if (expect_false (ev_is_active (w)))
2360	return;	3539	return;
		3540
		3541	EV_FREQUENT_CHECK;
2361		3542
2362	ev_start (EV_A_ (W)w, ++forkcnt);	3543	ev_start (EV_A_ (W)w, ++forkcnt);
2363	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);	3544	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2364	forks [forkcnt - 1] = w;	3545	forks [forkcnt - 1] = w;
		3546
		3547	EV_FREQUENT_CHECK;
2365	}	3548	}
2366		3549
2367	void	3550	void
2368	ev_fork_stop (EV_P_ ev_fork *w)	3551	ev_fork_stop (EV_P_ ev_fork *w)
2369	{	3552	{
2370	clear_pending (EV_A_ (W)w);	3553	clear_pending (EV_A_ (W)w);
2371	if (expect_false (!ev_is_active (w)))	3554	if (expect_false (!ev_is_active (w)))
2372	return;	3555	return;
2373		3556
		3557	EV_FREQUENT_CHECK;
		3558
2374	{	3559	{
2375	int active = ((W)w)->active;	3560	int active = ev_active (w);
		3561
2376	forks [active - 1] = forks [--forkcnt];	3562	forks [active - 1] = forks [--forkcnt];
2377	((W)forks [active - 1])->active = active;	3563	ev_active (forks [active - 1]) = active;
2378	}	3564	}
2379		3565
2380	ev_stop (EV_A_ (W)w);	3566	ev_stop (EV_A_ (W)w);
		3567
		3568	EV_FREQUENT_CHECK;
		3569	}
		3570	#endif
		3571
		3572	#if EV_ASYNC_ENABLE
		3573	void
		3574	ev_async_start (EV_P_ ev_async *w)
		3575	{
		3576	if (expect_false (ev_is_active (w)))
		3577	return;
		3578
		3579	evpipe_init (EV_A);
		3580
		3581	EV_FREQUENT_CHECK;
		3582
		3583	ev_start (EV_A_ (W)w, ++asynccnt);
		3584	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		3585	asyncs [asynccnt - 1] = w;
		3586
		3587	EV_FREQUENT_CHECK;
		3588	}
		3589
		3590	void
		3591	ev_async_stop (EV_P_ ev_async *w)
		3592	{
		3593	clear_pending (EV_A_ (W)w);
		3594	if (expect_false (!ev_is_active (w)))
		3595	return;
		3596
		3597	EV_FREQUENT_CHECK;
		3598
		3599	{
		3600	int active = ev_active (w);
		3601
		3602	asyncs [active - 1] = asyncs [--asynccnt];
		3603	ev_active (asyncs [active - 1]) = active;
		3604	}
		3605
		3606	ev_stop (EV_A_ (W)w);
		3607
		3608	EV_FREQUENT_CHECK;
		3609	}
		3610
		3611	void
		3612	ev_async_send (EV_P_ ev_async *w)
		3613	{
		3614	w->sent = 1;
		3615	evpipe_write (EV_A_ &async_pending);
2381	}	3616	}
2382	#endif	3617	#endif
2383		3618
2384	/*****************************************************************************/	3619	/*****************************************************************************/
2385		3620
…		…
2395	once_cb (EV_P_ struct ev_once *once, int revents)	3630	once_cb (EV_P_ struct ev_once *once, int revents)
2396	{	3631	{
2397	void (*cb)(int revents, void *arg) = once->cb;	3632	void (*cb)(int revents, void *arg) = once->cb;
2398	void *arg = once->arg;	3633	void *arg = once->arg;
2399		3634
2400	ev_io_stop (EV_A_ &once->io);	3635	ev_io_stop (EV_A_ &once->io);
2401	ev_timer_stop (EV_A_ &once->to);	3636	ev_timer_stop (EV_A_ &once->to);
2402	ev_free (once);	3637	ev_free (once);
2403		3638
2404	cb (revents, arg);	3639	cb (revents, arg);
2405	}	3640	}
2406		3641
2407	static void	3642	static void
2408	once_cb_io (EV_P_ ev_io *w, int revents)	3643	once_cb_io (EV_P_ ev_io *w, int revents)
2409	{	3644	{
2410	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3645	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3646
		3647	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2411	}	3648	}
2412		3649
2413	static void	3650	static void
2414	once_cb_to (EV_P_ ev_timer *w, int revents)	3651	once_cb_to (EV_P_ ev_timer *w, int revents)
2415	{	3652	{
2416	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3653	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3654
		3655	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2417	}	3656	}
2418		3657
2419	void	3658	void
2420	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3659	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2421	{	3660	{
2422	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3661	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2423		3662
2424	if (expect_false (!once))	3663	if (expect_false (!once))
2425	{	3664	{
2426	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3665	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2427	return;	3666	return;
2428	}	3667	}
2429		3668
2430	once->cb = cb;	3669	once->cb = cb;
2431	once->arg = arg;	3670	once->arg = arg;
…		…
2443	ev_timer_set (&once->to, timeout, 0.);	3682	ev_timer_set (&once->to, timeout, 0.);
2444	ev_timer_start (EV_A_ &once->to);	3683	ev_timer_start (EV_A_ &once->to);
2445	}	3684	}
2446	}	3685	}
2447		3686
		3687	/*****************************************************************************/
		3688
		3689	#if EV_WALK_ENABLE
		3690	void
		3691	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3692	{
		3693	int i, j;
		3694	ev_watcher_list *wl, *wn;
		3695
		3696	if (types & (EV_IO | EV_EMBED))
		3697	for (i = 0; i < anfdmax; ++i)
		3698	for (wl = anfds [i].head; wl; )
		3699	{
		3700	wn = wl->next;
		3701
		3702	#if EV_EMBED_ENABLE
		3703	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3704	{
		3705	if (types & EV_EMBED)
		3706	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3707	}
		3708	else
		3709	#endif
		3710	#if EV_USE_INOTIFY
		3711	if (ev_cb ((ev_io *)wl) == infy_cb)
		3712	;
		3713	else
		3714	#endif
		3715	if ((ev_io *)wl != &pipe_w)
		3716	if (types & EV_IO)
		3717	cb (EV_A_ EV_IO, wl);
		3718
		3719	wl = wn;
		3720	}
		3721
		3722	if (types & (EV_TIMER | EV_STAT))
		3723	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3724	#if EV_STAT_ENABLE
		3725	/*TODO: timer is not always active*/
		3726	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3727	{
		3728	if (types & EV_STAT)
		3729	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3730	}
		3731	else
		3732	#endif
		3733	if (types & EV_TIMER)
		3734	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3735
		3736	#if EV_PERIODIC_ENABLE
		3737	if (types & EV_PERIODIC)
		3738	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3739	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3740	#endif
		3741
		3742	#if EV_IDLE_ENABLE
		3743	if (types & EV_IDLE)
		3744	for (j = NUMPRI; i--; )
		3745	for (i = idlecnt [j]; i--; )
		3746	cb (EV_A_ EV_IDLE, idles [j][i]);
		3747	#endif
		3748
		3749	#if EV_FORK_ENABLE
		3750	if (types & EV_FORK)
		3751	for (i = forkcnt; i--; )
		3752	if (ev_cb (forks [i]) != embed_fork_cb)
		3753	cb (EV_A_ EV_FORK, forks [i]);
		3754	#endif
		3755
		3756	#if EV_ASYNC_ENABLE
		3757	if (types & EV_ASYNC)
		3758	for (i = asynccnt; i--; )
		3759	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3760	#endif
		3761
		3762	#if EV_PREPARE_ENABLE
		3763	if (types & EV_PREPARE)
		3764	for (i = preparecnt; i--; )
		3765	# if EV_EMBED_ENABLE
		3766	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3767	# endif
		3768	cb (EV_A_ EV_PREPARE, prepares [i]);
		3769	#endif
		3770
		3771	#if EV_CHECK_ENABLE
		3772	if (types & EV_CHECK)
		3773	for (i = checkcnt; i--; )
		3774	cb (EV_A_ EV_CHECK, checks [i]);
		3775	#endif
		3776
		3777	#if EV_SIGNAL_ENABLE
		3778	if (types & EV_SIGNAL)
		3779	for (i = 0; i < EV_NSIG - 1; ++i)
		3780	for (wl = signals [i].head; wl; )
		3781	{
		3782	wn = wl->next;
		3783	cb (EV_A_ EV_SIGNAL, wl);
		3784	wl = wn;
		3785	}
		3786	#endif
		3787
		3788	#if EV_CHILD_ENABLE
		3789	if (types & EV_CHILD)
		3790	for (i = (EV_PID_HASHSIZE); i--; )
		3791	for (wl = childs [i]; wl; )
		3792	{
		3793	wn = wl->next;
		3794	cb (EV_A_ EV_CHILD, wl);
		3795	wl = wn;
		3796	}
		3797	#endif
		3798	/* EV_STAT 0x00001000 /* stat data changed */
		3799	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3800	}
		3801	#endif
		3802
2448	#if EV_MULTIPLICITY	3803	#if EV_MULTIPLICITY
2449	#include "ev_wrap.h"	3804	#include "ev_wrap.h"
2450	#endif	3805	#endif
2451		3806
2452	#ifdef __cplusplus	3807	#ifdef __cplusplus

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