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Comparing libev/ev.c (file contents):
Revision 1.229 by root, Fri May 2 08:08:45 2008 UTC vs.
Revision 1.371 by root, Mon Feb 7 21:45:32 2011 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without 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	*
…		…
35	* and other provisions required by the GPL. If you do not delete the	35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under	36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.	37	* either the BSD or the GPL.
38	*/	38	*/
39		39
40	#ifdef __cplusplus
41	extern "C" {
42	#endif
43
44	/* this big block deduces configuration from config.h */	40	/* this big block deduces configuration from config.h */
45	#ifndef EV_STANDALONE	41	#ifndef EV_STANDALONE
46	# ifdef EV_CONFIG_H	42	# ifdef EV_CONFIG_H
47	# include EV_CONFIG_H	43	# include EV_CONFIG_H
48	# else	44	# else
49	# include "config.h"	45	# include "config.h"
50	# endif	46	# endif
51		47
		48	# if HAVE_CLOCK_SYSCALL
		49	# ifndef EV_USE_CLOCK_SYSCALL
		50	# define EV_USE_CLOCK_SYSCALL 1
		51	# ifndef EV_USE_REALTIME
		52	# define EV_USE_REALTIME 0
		53	# endif
		54	# ifndef EV_USE_MONOTONIC
		55	# define EV_USE_MONOTONIC 1
		56	# endif
		57	# endif
		58	# elif !defined(EV_USE_CLOCK_SYSCALL)
		59	# define EV_USE_CLOCK_SYSCALL 0
		60	# endif
		61
52	# if HAVE_CLOCK_GETTIME	62	# if HAVE_CLOCK_GETTIME
53	# ifndef EV_USE_MONOTONIC	63	# ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	64	# define EV_USE_MONOTONIC 1
55	# endif	65	# endif
56	# ifndef EV_USE_REALTIME	66	# ifndef EV_USE_REALTIME
57	# define EV_USE_REALTIME 1	67	# define EV_USE_REALTIME 0
58	# endif	68	# endif
59	# else	69	# else
60	# ifndef EV_USE_MONOTONIC	70	# ifndef EV_USE_MONOTONIC
61	# define EV_USE_MONOTONIC 0	71	# define EV_USE_MONOTONIC 0
62	# endif	72	# endif
63	# ifndef EV_USE_REALTIME	73	# ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	74	# define EV_USE_REALTIME 0
65	# endif	75	# endif
66	# endif	76	# endif
67		77
		78	# if HAVE_NANOSLEEP
68	# ifndef EV_USE_NANOSLEEP	79	# ifndef EV_USE_NANOSLEEP
69	# if HAVE_NANOSLEEP
70	# define EV_USE_NANOSLEEP 1	80	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		81	# endif
71	# else	82	# else
		83	# undef EV_USE_NANOSLEEP
72	# define EV_USE_NANOSLEEP 0	84	# define EV_USE_NANOSLEEP 0
		85	# endif
		86
		87	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		88	# ifndef EV_USE_SELECT
		89	# define EV_USE_SELECT EV_FEATURE_BACKENDS
73	# endif	90	# endif
		91	# else
		92	# undef EV_USE_SELECT
		93	# define EV_USE_SELECT 0
74	# endif	94	# endif
75		95
		96	# if HAVE_POLL && HAVE_POLL_H
76	# ifndef EV_USE_SELECT	97	# ifndef EV_USE_POLL
77	# if HAVE_SELECT && HAVE_SYS_SELECT_H	98	# define EV_USE_POLL EV_FEATURE_BACKENDS
78	# define EV_USE_SELECT 1
79	# else
80	# define EV_USE_SELECT 0
81	# endif	99	# endif
82	# endif
83
84	# ifndef EV_USE_POLL
85	# if HAVE_POLL && HAVE_POLL_H
86	# define EV_USE_POLL 1
87	# else	100	# else
		101	# undef EV_USE_POLL
88	# define EV_USE_POLL 0	102	# define EV_USE_POLL 0
89	# endif
90	# endif	103	# endif
91		104
92	# ifndef EV_USE_EPOLL
93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	105	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94	# define EV_USE_EPOLL 1	106	# ifndef EV_USE_EPOLL
95	# else	107	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96	# define EV_USE_EPOLL 0
97	# endif	108	# endif
		109	# else
		110	# undef EV_USE_EPOLL
		111	# define EV_USE_EPOLL 0
98	# endif	112	# endif
99		113
		114	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100	# ifndef EV_USE_KQUEUE	115	# ifndef EV_USE_KQUEUE
101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	116	# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102	# define EV_USE_KQUEUE 1
103	# else
104	# define EV_USE_KQUEUE 0
105	# endif	117	# endif
		118	# else
		119	# undef EV_USE_KQUEUE
		120	# define EV_USE_KQUEUE 0
106	# endif	121	# endif
107		122
108	# ifndef EV_USE_PORT
109	# if HAVE_PORT_H && HAVE_PORT_CREATE	123	# if HAVE_PORT_H && HAVE_PORT_CREATE
110	# define EV_USE_PORT 1	124	# ifndef EV_USE_PORT
111	# else	125	# define EV_USE_PORT EV_FEATURE_BACKENDS
112	# define EV_USE_PORT 0
113	# endif	126	# endif
		127	# else
		128	# undef EV_USE_PORT
		129	# define EV_USE_PORT 0
114	# endif	130	# endif
115		131
116	# ifndef EV_USE_INOTIFY
117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H	132	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118	# define EV_USE_INOTIFY 1	133	# ifndef EV_USE_INOTIFY
119	# else
120	# define EV_USE_INOTIFY 0	134	# define EV_USE_INOTIFY EV_FEATURE_OS
121	# endif	135	# endif
		136	# else
		137	# undef EV_USE_INOTIFY
		138	# define EV_USE_INOTIFY 0
122	# endif	139	# endif
123		140
		141	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124	# ifndef EV_USE_EVENTFD	142	# ifndef EV_USE_SIGNALFD
125	# if HAVE_EVENTFD	143	# define EV_USE_SIGNALFD EV_FEATURE_OS
126	# define EV_USE_EVENTFD 1
127	# else
128	# define EV_USE_EVENTFD 0
129	# endif	144	# endif
		145	# else
		146	# undef EV_USE_SIGNALFD
		147	# define EV_USE_SIGNALFD 0
130	# endif	148	# endif
131		149
		150	# if HAVE_EVENTFD
		151	# ifndef EV_USE_EVENTFD
		152	# define EV_USE_EVENTFD EV_FEATURE_OS
		153	# endif
		154	# else
		155	# undef EV_USE_EVENTFD
		156	# define EV_USE_EVENTFD 0
		157	# endif
		158
132	#endif	159	#endif
133		160
134	#include <math.h>	161	#include <math.h>
135	#include <stdlib.h>	162	#include <stdlib.h>
		163	#include <string.h>
136	#include <fcntl.h>	164	#include <fcntl.h>
137	#include <stddef.h>	165	#include <stddef.h>
138		166
139	#include <stdio.h>	167	#include <stdio.h>
140		168
141	#include <assert.h>	169	#include <assert.h>
142	#include <errno.h>	170	#include <errno.h>
143	#include <sys/types.h>	171	#include <sys/types.h>
144	#include <time.h>	172	#include <time.h>
		173	#include <limits.h>
145		174
146	#include <signal.h>	175	#include <signal.h>
147		176
148	#ifdef EV_H	177	#ifdef EV_H
149	# include EV_H	178	# include EV_H
150	#else	179	#else
151	# include "ev.h"	180	# include "ev.h"
152	#endif	181	#endif
		182
		183	EV_CPP(extern "C" {)
153		184
154	#ifndef _WIN32	185	#ifndef _WIN32
155	# include <sys/time.h>	186	# include <sys/time.h>
156	# include <sys/wait.h>	187	# include <sys/wait.h>
157	# include <unistd.h>	188	# include <unistd.h>
158	#else	189	#else
		190	# include <io.h>
159	# define WIN32_LEAN_AND_MEAN	191	# define WIN32_LEAN_AND_MEAN
160	# include <windows.h>	192	# include <windows.h>
161	# ifndef EV_SELECT_IS_WINSOCKET	193	# ifndef EV_SELECT_IS_WINSOCKET
162	# define EV_SELECT_IS_WINSOCKET 1	194	# define EV_SELECT_IS_WINSOCKET 1
163	# endif	195	# endif
		196	# undef EV_AVOID_STDIO
164	#endif	197	#endif
		198
		199	/* OS X, in its infinite idiocy, actually HARDCODES
		200	* a limit of 1024 into their select. Where people have brains,
		201	* OS X engineers apparently have a vacuum. Or maybe they were
		202	* ordered to have a vacuum, or they do anything for money.
		203	* This might help. Or not.
		204	*/
		205	#define _DARWIN_UNLIMITED_SELECT 1
165		206
166	/* this block tries to deduce configuration from header-defined symbols and defaults */	207	/* this block tries to deduce configuration from header-defined symbols and defaults */
167		208
		209	/* try to deduce the maximum number of signals on this platform */
		210	#if defined (EV_NSIG)
		211	/* use what's provided */
		212	#elif defined (NSIG)
		213	# define EV_NSIG (NSIG)
		214	#elif defined(_NSIG)
		215	# define EV_NSIG (_NSIG)
		216	#elif defined (SIGMAX)
		217	# define EV_NSIG (SIGMAX+1)
		218	#elif defined (SIG_MAX)
		219	# define EV_NSIG (SIG_MAX+1)
		220	#elif defined (_SIG_MAX)
		221	# define EV_NSIG (_SIG_MAX+1)
		222	#elif defined (MAXSIG)
		223	# define EV_NSIG (MAXSIG+1)
		224	#elif defined (MAX_SIG)
		225	# define EV_NSIG (MAX_SIG+1)
		226	#elif defined (SIGARRAYSIZE)
		227	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
		228	#elif defined (_sys_nsig)
		229	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		230	#else
		231	# error "unable to find value for NSIG, please report"
		232	/* to make it compile regardless, just remove the above line, */
		233	/* but consider reporting it, too! :) */
		234	# define EV_NSIG 65
		235	#endif
		236
		237	#ifndef EV_USE_CLOCK_SYSCALL
		238	# if __linux && __GLIBC__ >= 2
		239	# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
		240	# else
		241	# define EV_USE_CLOCK_SYSCALL 0
		242	# endif
		243	#endif
		244
168	#ifndef EV_USE_MONOTONIC	245	#ifndef EV_USE_MONOTONIC
		246	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		247	# define EV_USE_MONOTONIC EV_FEATURE_OS
		248	# else
169	# define EV_USE_MONOTONIC 0	249	# define EV_USE_MONOTONIC 0
		250	# endif
170	#endif	251	#endif
171		252
172	#ifndef EV_USE_REALTIME	253	#ifndef EV_USE_REALTIME
173	# define EV_USE_REALTIME 0	254	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174	#endif	255	#endif
175		256
176	#ifndef EV_USE_NANOSLEEP	257	#ifndef EV_USE_NANOSLEEP
		258	# if _POSIX_C_SOURCE >= 199309L
		259	# define EV_USE_NANOSLEEP EV_FEATURE_OS
		260	# else
177	# define EV_USE_NANOSLEEP 0	261	# define EV_USE_NANOSLEEP 0
		262	# endif
178	#endif	263	#endif
179		264
180	#ifndef EV_USE_SELECT	265	#ifndef EV_USE_SELECT
181	# define EV_USE_SELECT 1	266	# define EV_USE_SELECT EV_FEATURE_BACKENDS
182	#endif	267	#endif
183		268
184	#ifndef EV_USE_POLL	269	#ifndef EV_USE_POLL
185	# ifdef _WIN32	270	# ifdef _WIN32
186	# define EV_USE_POLL 0	271	# define EV_USE_POLL 0
187	# else	272	# else
188	# define EV_USE_POLL 1	273	# define EV_USE_POLL EV_FEATURE_BACKENDS
189	# endif	274	# endif
190	#endif	275	#endif
191		276
192	#ifndef EV_USE_EPOLL	277	#ifndef EV_USE_EPOLL
193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))	278	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194	# define EV_USE_EPOLL 1	279	# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195	# else	280	# else
196	# define EV_USE_EPOLL 0	281	# define EV_USE_EPOLL 0
197	# endif	282	# endif
198	#endif	283	#endif
199		284
…		…
205	# define EV_USE_PORT 0	290	# define EV_USE_PORT 0
206	#endif	291	#endif
207		292
208	#ifndef EV_USE_INOTIFY	293	#ifndef EV_USE_INOTIFY
209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))	294	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210	# define EV_USE_INOTIFY 1	295	# define EV_USE_INOTIFY EV_FEATURE_OS
211	# else	296	# else
212	# define EV_USE_INOTIFY 0	297	# define EV_USE_INOTIFY 0
213	# endif	298	# endif
214	#endif	299	#endif
215		300
216	#ifndef EV_PID_HASHSIZE	301	#ifndef EV_PID_HASHSIZE
217	# if EV_MINIMAL	302	# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218	# define EV_PID_HASHSIZE 1
219	# else
220	# define EV_PID_HASHSIZE 16
221	# endif
222	#endif	303	#endif
223		304
224	#ifndef EV_INOTIFY_HASHSIZE	305	#ifndef EV_INOTIFY_HASHSIZE
225	# if EV_MINIMAL	306	# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226	# define EV_INOTIFY_HASHSIZE 1
227	# else
228	# define EV_INOTIFY_HASHSIZE 16
229	# endif
230	#endif	307	#endif
231		308
232	#ifndef EV_USE_EVENTFD	309	#ifndef EV_USE_EVENTFD
233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))	310	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234	# define EV_USE_EVENTFD 1	311	# define EV_USE_EVENTFD EV_FEATURE_OS
235	# else	312	# else
236	# define EV_USE_EVENTFD 0	313	# define EV_USE_EVENTFD 0
237	# endif	314	# endif
238	#endif	315	#endif
239		316
		317	#ifndef EV_USE_SIGNALFD
		318	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		319	# define EV_USE_SIGNALFD EV_FEATURE_OS
		320	# else
		321	# define EV_USE_SIGNALFD 0
		322	# endif
		323	#endif
		324
		325	#if 0 /* debugging */
		326	# define EV_VERIFY 3
		327	# define EV_USE_4HEAP 1
		328	# define EV_HEAP_CACHE_AT 1
		329	#endif
		330
		331	#ifndef EV_VERIFY
		332	# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
		333	#endif
		334
		335	#ifndef EV_USE_4HEAP
		336	# define EV_USE_4HEAP EV_FEATURE_DATA
		337	#endif
		338
		339	#ifndef EV_HEAP_CACHE_AT
		340	# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
		341	#endif
		342
		343	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		344	/* which makes programs even slower. might work on other unices, too. */
		345	#if EV_USE_CLOCK_SYSCALL
		346	# include <syscall.h>
		347	# ifdef SYS_clock_gettime
		348	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		349	# undef EV_USE_MONOTONIC
		350	# define EV_USE_MONOTONIC 1
		351	# else
		352	# undef EV_USE_CLOCK_SYSCALL
		353	# define EV_USE_CLOCK_SYSCALL 0
		354	# endif
		355	#endif
		356
240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	357	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		358
		359	#ifdef _AIX
		360	/* AIX has a completely broken poll.h header */
		361	# undef EV_USE_POLL
		362	# define EV_USE_POLL 0
		363	#endif
241		364
242	#ifndef CLOCK_MONOTONIC	365	#ifndef CLOCK_MONOTONIC
243	# undef EV_USE_MONOTONIC	366	# undef EV_USE_MONOTONIC
244	# define EV_USE_MONOTONIC 0	367	# define EV_USE_MONOTONIC 0
245	#endif	368	#endif
…		…
253	# undef EV_USE_INOTIFY	376	# undef EV_USE_INOTIFY
254	# define EV_USE_INOTIFY 0	377	# define EV_USE_INOTIFY 0
255	#endif	378	#endif
256		379
257	#if !EV_USE_NANOSLEEP	380	#if !EV_USE_NANOSLEEP
258	# ifndef _WIN32	381	/* hp-ux has it in sys/time.h, which we unconditionally include above */
		382	# if !defined(_WIN32) && !defined(__hpux)
259	# include <sys/select.h>	383	# include <sys/select.h>
260	# endif	384	# endif
261	#endif	385	#endif
262		386
263	#if EV_USE_INOTIFY	387	#if EV_USE_INOTIFY
		388	# include <sys/statfs.h>
264	# include <sys/inotify.h>	389	# include <sys/inotify.h>
		390	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		391	# ifndef IN_DONT_FOLLOW
		392	# undef EV_USE_INOTIFY
		393	# define EV_USE_INOTIFY 0
		394	# endif
265	#endif	395	#endif
266		396
267	#if EV_SELECT_IS_WINSOCKET	397	#if EV_SELECT_IS_WINSOCKET
268	# include <winsock.h>	398	# include <winsock.h>
269	#endif	399	#endif
270		400
271	#if EV_USE_EVENTFD	401	#if EV_USE_EVENTFD
272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	402	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273	# include <stdint.h>	403	# include <stdint.h>
274	# ifdef __cplusplus	404	# ifndef EFD_NONBLOCK
275	extern "C" {	405	# define EFD_NONBLOCK O_NONBLOCK
276	# endif	406	# endif
277	int eventfd (unsigned int initval, int flags);	407	# ifndef EFD_CLOEXEC
278	# ifdef __cplusplus	408	# ifdef O_CLOEXEC
279	}	409	# define EFD_CLOEXEC O_CLOEXEC
		410	# else
		411	# define EFD_CLOEXEC 02000000
		412	# endif
280	# endif	413	# endif
		414	EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
		415	#endif
		416
		417	#if EV_USE_SIGNALFD
		418	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		419	# include <stdint.h>
		420	# ifndef SFD_NONBLOCK
		421	# define SFD_NONBLOCK O_NONBLOCK
		422	# endif
		423	# ifndef SFD_CLOEXEC
		424	# ifdef O_CLOEXEC
		425	# define SFD_CLOEXEC O_CLOEXEC
		426	# else
		427	# define SFD_CLOEXEC 02000000
		428	# endif
		429	# endif
		430	EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
		431
		432	struct signalfd_siginfo
		433	{
		434	uint32_t ssi_signo;
		435	char pad[128 - sizeof (uint32_t)];
		436	};
281	#endif	437	#endif
282		438
283	/**/	439	/**/
		440
		441	#if EV_VERIFY >= 3
		442	# define EV_FREQUENT_CHECK ev_verify (EV_A)
		443	#else
		444	# define EV_FREQUENT_CHECK do { } while (0)
		445	#endif
284		446
285	/*	447	/*
286	* This is used to avoid floating point rounding problems.	448	* This is used to avoid floating point rounding problems.
287	* It is added to ev_rt_now when scheduling periodics	449	* It is added to ev_rt_now when scheduling periodics
288	* to ensure progress, time-wise, even when rounding	450	* to ensure progress, time-wise, even when rounding
…		…
292	*/	454	*/
293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	455	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
294		456
295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	457	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	458	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */	459
		460	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
		461	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
298		462
299	#if __GNUC__ >= 4	463	#if __GNUC__ >= 4
300	# define expect(expr,value) __builtin_expect ((expr),(value))	464	# define expect(expr,value) __builtin_expect ((expr),(value))
301	# define noinline __attribute__ ((noinline))	465	# define noinline __attribute__ ((noinline))
302	#else	466	#else
…		…
309		473
310	#define expect_false(expr) expect ((expr) != 0, 0)	474	#define expect_false(expr) expect ((expr) != 0, 0)
311	#define expect_true(expr) expect ((expr) != 0, 1)	475	#define expect_true(expr) expect ((expr) != 0, 1)
312	#define inline_size static inline	476	#define inline_size static inline
313		477
314	#if EV_MINIMAL	478	#if EV_FEATURE_CODE
		479	# define inline_speed static inline
		480	#else
315	# define inline_speed static noinline	481	# define inline_speed static noinline
		482	#endif
		483
		484	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		485
		486	#if EV_MINPRI == EV_MAXPRI
		487	# define ABSPRI(w) (((W)w), 0)
316	#else	488	#else
317	# define inline_speed static inline
318	#endif
319
320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	489	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		490	#endif
322		491
323	#define EMPTY /* required for microsofts broken pseudo-c compiler */	492	#define EMPTY /* required for microsofts broken pseudo-c compiler */
324	#define EMPTY2(a,b) /* used to suppress some warnings */	493	#define EMPTY2(a,b) /* used to suppress some warnings */
325		494
326	typedef ev_watcher *W;	495	typedef ev_watcher *W;
…		…
328	typedef ev_watcher_time *WT;	497	typedef ev_watcher_time *WT;
329		498
330	#define ev_active(w) ((W)(w))->active	499	#define ev_active(w) ((W)(w))->active
331	#define ev_at(w) ((WT)(w))->at	500	#define ev_at(w) ((WT)(w))->at
332		501
		502	#if EV_USE_REALTIME
		503	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		504	/* giving it a reasonably high chance of working on typical architectures */
		505	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		506	#endif
		507
333	#if EV_USE_MONOTONIC	508	#if EV_USE_MONOTONIC
334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335	/* giving it a reasonably high chance of working on typical architetcures */
336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	509	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		510	#endif
		511
		512	#ifndef EV_FD_TO_WIN32_HANDLE
		513	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		514	#endif
		515	#ifndef EV_WIN32_HANDLE_TO_FD
		516	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		517	#endif
		518	#ifndef EV_WIN32_CLOSE_FD
		519	# define EV_WIN32_CLOSE_FD(fd) close (fd)
337	#endif	520	#endif
338		521
339	#ifdef _WIN32	522	#ifdef _WIN32
340	# include "ev_win32.c"	523	# include "ev_win32.c"
341	#endif	524	#endif
342		525
343	/*****************************************************************************/	526	/*****************************************************************************/
344		527
		528	#ifdef __linux
		529	# include <sys/utsname.h>
		530	#endif
		531
		532	static unsigned int noinline
		533	ev_linux_version (void)
		534	{
		535	#ifdef __linux
		536	unsigned int v = 0;
		537	struct utsname buf;
		538	int i;
		539	char *p = buf.release;
		540
		541	if (uname (&buf))
		542	return 0;
		543
		544	for (i = 3+1; --i; )
		545	{
		546	unsigned int c = 0;
		547
		548	for (;;)
		549	{
		550	if (*p >= '0' && *p <= '9')
		551	c = c * 10 + *p++ - '0';
		552	else
		553	{
		554	p += *p == '.';
		555	break;
		556	}
		557	}
		558
		559	v = (v << 8) | c;
		560	}
		561
		562	return v;
		563	#else
		564	return 0;
		565	#endif
		566	}
		567
		568	/*****************************************************************************/
		569
		570	#if EV_AVOID_STDIO
		571	static void noinline
		572	ev_printerr (const char *msg)
		573	{
		574	write (STDERR_FILENO, msg, strlen (msg));
		575	}
		576	#endif
		577
345	static void (*syserr_cb)(const char *msg);	578	static void (*syserr_cb)(const char *msg);
346		579
347	void	580	void
348	ev_set_syserr_cb (void (*cb)(const char *msg))	581	ev_set_syserr_cb (void (*cb)(const char *msg))
349	{	582	{
350	syserr_cb = cb;	583	syserr_cb = cb;
351	}	584	}
352		585
353	static void noinline	586	static void noinline
354	syserr (const char *msg)	587	ev_syserr (const char *msg)
355	{	588	{
356	if (!msg)	589	if (!msg)
357	msg = "(libev) system error";	590	msg = "(libev) system error";
358		591
359	if (syserr_cb)	592	if (syserr_cb)
360	syserr_cb (msg);	593	syserr_cb (msg);
361	else	594	else
362	{	595	{
		596	#if EV_AVOID_STDIO
		597	ev_printerr (msg);
		598	ev_printerr (": ");
		599	ev_printerr (strerror (errno));
		600	ev_printerr ("\n");
		601	#else
363	perror (msg);	602	perror (msg);
		603	#endif
364	abort ();	604	abort ();
365	}	605	}
366	}	606	}
367		607
368	static void *	608	static void *
369	ev_realloc_emul (void *ptr, long size)	609	ev_realloc_emul (void *ptr, long size)
370	{	610	{
		611	#if __GLIBC__
		612	return realloc (ptr, size);
		613	#else
371	/* some systems, notably openbsd and darwin, fail to properly	614	/* some systems, notably openbsd and darwin, fail to properly
372	* implement realloc (x, 0) (as required by both ansi c-98 and	615	* implement realloc (x, 0) (as required by both ansi c-89 and
373	* the single unix specification, so work around them here.	616	* the single unix specification, so work around them here.
374	*/	617	*/
375		618
376	if (size)	619	if (size)
377	return realloc (ptr, size);	620	return realloc (ptr, size);
378		621
379	free (ptr);	622	free (ptr);
380	return 0;	623	return 0;
		624	#endif
381	}	625	}
382		626
383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	627	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384		628
385	void	629	void
…		…
393	{	637	{
394	ptr = alloc (ptr, size);	638	ptr = alloc (ptr, size);
395		639
396	if (!ptr && size)	640	if (!ptr && size)
397	{	641	{
		642	#if EV_AVOID_STDIO
		643	ev_printerr ("(libev) memory allocation failed, aborting.\n");
		644	#else
398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	645	fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
		646	#endif
399	abort ();	647	abort ();
400	}	648	}
401		649
402	return ptr;	650	return ptr;
403	}	651	}
…		…
405	#define ev_malloc(size) ev_realloc (0, (size))	653	#define ev_malloc(size) ev_realloc (0, (size))
406	#define ev_free(ptr) ev_realloc ((ptr), 0)	654	#define ev_free(ptr) ev_realloc ((ptr), 0)
407		655
408	/*****************************************************************************/	656	/*****************************************************************************/
409		657
		658	/* set in reify when reification needed */
		659	#define EV_ANFD_REIFY 1
		660
		661	/* file descriptor info structure */
410	typedef struct	662	typedef struct
411	{	663	{
412	WL head;	664	WL head;
413	unsigned char events;	665	unsigned char events; /* the events watched for */
		666	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		667	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
414	unsigned char reify;	668	unsigned char unused;
		669	#if EV_USE_EPOLL
		670	unsigned int egen; /* generation counter to counter epoll bugs */
		671	#endif
415	#if EV_SELECT_IS_WINSOCKET	672	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
416	SOCKET handle;	673	SOCKET handle;
417	#endif	674	#endif
		675	#if EV_USE_IOCP
		676	OVERLAPPED or, ow;
		677	#endif
418	} ANFD;	678	} ANFD;
419		679
		680	/* stores the pending event set for a given watcher */
420	typedef struct	681	typedef struct
421	{	682	{
422	W w;	683	W w;
423	int events;	684	int events; /* the pending event set for the given watcher */
424	} ANPENDING;	685	} ANPENDING;
425		686
426	#if EV_USE_INOTIFY	687	#if EV_USE_INOTIFY
		688	/* hash table entry per inotify-id */
427	typedef struct	689	typedef struct
428	{	690	{
429	WL head;	691	WL head;
430	} ANFS;	692	} ANFS;
		693	#endif
		694
		695	/* Heap Entry */
		696	#if EV_HEAP_CACHE_AT
		697	/* a heap element */
		698	typedef struct {
		699	ev_tstamp at;
		700	WT w;
		701	} ANHE;
		702
		703	#define ANHE_w(he) (he).w /* access watcher, read-write */
		704	#define ANHE_at(he) (he).at /* access cached at, read-only */
		705	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		706	#else
		707	/* a heap element */
		708	typedef WT ANHE;
		709
		710	#define ANHE_w(he) (he)
		711	#define ANHE_at(he) (he)->at
		712	#define ANHE_at_cache(he)
431	#endif	713	#endif
432		714
433	#if EV_MULTIPLICITY	715	#if EV_MULTIPLICITY
434		716
435	struct ev_loop	717	struct ev_loop
…		…
454		736
455	static int ev_default_loop_ptr;	737	static int ev_default_loop_ptr;
456		738
457	#endif	739	#endif
458		740
		741	#if EV_FEATURE_API
		742	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		743	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		744	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		745	#else
		746	# define EV_RELEASE_CB (void)0
		747	# define EV_ACQUIRE_CB (void)0
		748	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		749	#endif
		750
		751	#define EVBREAK_RECURSE 0x80
		752
459	/*****************************************************************************/	753	/*****************************************************************************/
460		754
		755	#ifndef EV_HAVE_EV_TIME
461	ev_tstamp	756	ev_tstamp
462	ev_time (void)	757	ev_time (void)
463	{	758	{
464	#if EV_USE_REALTIME	759	#if EV_USE_REALTIME
		760	if (expect_true (have_realtime))
		761	{
465	struct timespec ts;	762	struct timespec ts;
466	clock_gettime (CLOCK_REALTIME, &ts);	763	clock_gettime (CLOCK_REALTIME, &ts);
467	return ts.tv_sec + ts.tv_nsec * 1e-9;	764	return ts.tv_sec + ts.tv_nsec * 1e-9;
468	#else	765	}
		766	#endif
		767
469	struct timeval tv;	768	struct timeval tv;
470	gettimeofday (&tv, 0);	769	gettimeofday (&tv, 0);
471	return tv.tv_sec + tv.tv_usec * 1e-6;	770	return tv.tv_sec + tv.tv_usec * 1e-6;
472	#endif
473	}	771	}
		772	#endif
474		773
475	ev_tstamp inline_size	774	inline_size ev_tstamp
476	get_clock (void)	775	get_clock (void)
477	{	776	{
478	#if EV_USE_MONOTONIC	777	#if EV_USE_MONOTONIC
479	if (expect_true (have_monotonic))	778	if (expect_true (have_monotonic))
480	{	779	{
…		…
501	if (delay > 0.)	800	if (delay > 0.)
502	{	801	{
503	#if EV_USE_NANOSLEEP	802	#if EV_USE_NANOSLEEP
504	struct timespec ts;	803	struct timespec ts;
505		804
506	ts.tv_sec = (time_t)delay;	805	EV_TS_SET (ts, delay);
507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509	nanosleep (&ts, 0);	806	nanosleep (&ts, 0);
510	#elif defined(_WIN32)	807	#elif defined(_WIN32)
511	Sleep ((unsigned long)(delay * 1e3));	808	Sleep ((unsigned long)(delay * 1e3));
512	#else	809	#else
513	struct timeval tv;	810	struct timeval tv;
514		811
515	tv.tv_sec = (time_t)delay;	812	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	813	/* something not guaranteed by newer posix versions, but guaranteed */
517		814	/* by older ones */
		815	EV_TV_SET (tv, delay);
518	select (0, 0, 0, 0, &tv);	816	select (0, 0, 0, 0, &tv);
519	#endif	817	#endif
520	}	818	}
521	}	819	}
522		820
		821	inline_speed int
		822	ev_timeout_to_ms (ev_tstamp timeout)
		823	{
		824	int ms = timeout * 1000. + .999999;
		825
		826	return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
		827	}
		828
523	/*****************************************************************************/	829	/*****************************************************************************/
524		830
525	int inline_size	831	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		832
		833	/* find a suitable new size for the given array, */
		834	/* hopefully by rounding to a nice-to-malloc size */
		835	inline_size int
526	array_nextsize (int elem, int cur, int cnt)	836	array_nextsize (int elem, int cur, int cnt)
527	{	837	{
528	int ncur = cur + 1;	838	int ncur = cur + 1;
529		839
530	do	840	do
531	ncur <<= 1;	841	ncur <<= 1;
532	while (cnt > ncur);	842	while (cnt > ncur);
533		843
534	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	844	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
535	if (elem * ncur > 4096)	845	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
536	{	846	{
537	ncur *= elem;	847	ncur *= elem;
538	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;	848	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
539	ncur = ncur - sizeof (void *) * 4;	849	ncur = ncur - sizeof (void *) * 4;
540	ncur /= elem;	850	ncur /= elem;
541	}	851	}
542		852
543	return ncur;	853	return ncur;
…		…
547	array_realloc (int elem, void *base, int *cur, int cnt)	857	array_realloc (int elem, void *base, int *cur, int cnt)
548	{	858	{
549	*cur = array_nextsize (elem, *cur, cnt);	859	*cur = array_nextsize (elem, *cur, cnt);
550	return ev_realloc (base, elem * *cur);	860	return ev_realloc (base, elem * *cur);
551	}	861	}
		862
		863	#define array_init_zero(base,count) \
		864	memset ((void *)(base), 0, sizeof (*(base)) * (count))
552		865
553	#define array_needsize(type,base,cur,cnt,init) \	866	#define array_needsize(type,base,cur,cnt,init) \
554	if (expect_false ((cnt) > (cur))) \	867	if (expect_false ((cnt) > (cur))) \
555	{ \	868	{ \
556	int ocur_ = (cur); \	869	int ocur_ = (cur); \
…		…
568	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	881	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
569	}	882	}
570	#endif	883	#endif
571		884
572	#define array_free(stem, idx) \	885	#define array_free(stem, idx) \
573	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	886	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
574		887
575	/*****************************************************************************/	888	/*****************************************************************************/
		889
		890	/* dummy callback for pending events */
		891	static void noinline
		892	pendingcb (EV_P_ ev_prepare *w, int revents)
		893	{
		894	}
576		895
577	void noinline	896	void noinline
578	ev_feed_event (EV_P_ void *w, int revents)	897	ev_feed_event (EV_P_ void *w, int revents)
579	{	898	{
580	W w_ = (W)w;	899	W w_ = (W)w;
…		…
589	pendings [pri][w_->pending - 1].w = w_;	908	pendings [pri][w_->pending - 1].w = w_;
590	pendings [pri][w_->pending - 1].events = revents;	909	pendings [pri][w_->pending - 1].events = revents;
591	}	910	}
592	}	911	}
593		912
594	void inline_speed	913	inline_speed void
		914	feed_reverse (EV_P_ W w)
		915	{
		916	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		917	rfeeds [rfeedcnt++] = w;
		918	}
		919
		920	inline_size void
		921	feed_reverse_done (EV_P_ int revents)
		922	{
		923	do
		924	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		925	while (rfeedcnt);
		926	}
		927
		928	inline_speed void
595	queue_events (EV_P_ W *events, int eventcnt, int type)	929	queue_events (EV_P_ W *events, int eventcnt, int type)
596	{	930	{
597	int i;	931	int i;
598		932
599	for (i = 0; i < eventcnt; ++i)	933	for (i = 0; i < eventcnt; ++i)
600	ev_feed_event (EV_A_ events [i], type);	934	ev_feed_event (EV_A_ events [i], type);
601	}	935	}
602		936
603	/*****************************************************************************/	937	/*****************************************************************************/
604		938
605	void inline_size	939	inline_speed void
606	anfds_init (ANFD *base, int count)
607	{
608	while (count--)
609	{
610	base->head = 0;
611	base->events = EV_NONE;
612	base->reify = 0;
613
614	++base;
615	}
616	}
617
618	void inline_speed
619	fd_event (EV_P_ int fd, int revents)	940	fd_event_nocheck (EV_P_ int fd, int revents)
620	{	941	{
621	ANFD *anfd = anfds + fd;	942	ANFD *anfd = anfds + fd;
622	ev_io *w;	943	ev_io *w;
623		944
624	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	945	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
628	if (ev)	949	if (ev)
629	ev_feed_event (EV_A_ (W)w, ev);	950	ev_feed_event (EV_A_ (W)w, ev);
630	}	951	}
631	}	952	}
632		953
		954	/* do not submit kernel events for fds that have reify set */
		955	/* because that means they changed while we were polling for new events */
		956	inline_speed void
		957	fd_event (EV_P_ int fd, int revents)
		958	{
		959	ANFD *anfd = anfds + fd;
		960
		961	if (expect_true (!anfd->reify))
		962	fd_event_nocheck (EV_A_ fd, revents);
		963	}
		964
633	void	965	void
634	ev_feed_fd_event (EV_P_ int fd, int revents)	966	ev_feed_fd_event (EV_P_ int fd, int revents)
635	{	967	{
636	if (fd >= 0 && fd < anfdmax)	968	if (fd >= 0 && fd < anfdmax)
637	fd_event (EV_A_ fd, revents);	969	fd_event_nocheck (EV_A_ fd, revents);
638	}	970	}
639		971
640	void inline_size	972	/* make sure the external fd watch events are in-sync */
		973	/* with the kernel/libev internal state */
		974	inline_size void
641	fd_reify (EV_P)	975	fd_reify (EV_P)
642	{	976	{
643	int i;	977	int i;
		978
		979	#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
		980	for (i = 0; i < fdchangecnt; ++i)
		981	{
		982	int fd = fdchanges [i];
		983	ANFD *anfd = anfds + fd;
		984
		985	if (anfd->reify & EV__IOFDSET)
		986	{
		987	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
		988
		989	if (handle != anfd->handle)
		990	{
		991	unsigned long arg;
		992
		993	assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
		994
		995	/* handle changed, but fd didn't - we need to do it in two steps */
		996	backend_modify (EV_A_ fd, anfd->events, 0);
		997	anfd->events = 0;
		998	anfd->handle = handle;
		999	}
		1000	}
		1001	}
		1002	#endif
644		1003
645	for (i = 0; i < fdchangecnt; ++i)	1004	for (i = 0; i < fdchangecnt; ++i)
646	{	1005	{
647	int fd = fdchanges [i];	1006	int fd = fdchanges [i];
648	ANFD *anfd = anfds + fd;	1007	ANFD *anfd = anfds + fd;
649	ev_io *w;	1008	ev_io *w;
650		1009
651	unsigned char events = 0;	1010	unsigned char o_events = anfd->events;
		1011	unsigned char o_reify = anfd->reify;
652		1012
653	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	1013	anfd->reify = 0;
654	events |= (unsigned char)w->events;
655		1014
656	#if EV_SELECT_IS_WINSOCKET	1015	/*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
657	if (events)
658	{	1016	{
659	unsigned long argp;	1017	anfd->events = 0;
660	#ifdef EV_FD_TO_WIN32_HANDLE	1018
661	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	1019	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
662	#else	1020	anfd->events |= (unsigned char)w->events;
663	anfd->handle = _get_osfhandle (fd);	1021
664	#endif	1022	if (o_events != anfd->events)
665	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	1023	o_reify = EV__IOFDSET; /* actually |= */
666	}	1024	}
667	#endif
668		1025
669	{	1026	if (o_reify & EV__IOFDSET)
670	unsigned char o_events = anfd->events;
671	unsigned char o_reify = anfd->reify;
672
673	anfd->reify = 0;
674	anfd->events = events;
675
676	if (o_events != events || o_reify & EV_IOFDSET)
677	backend_modify (EV_A_ fd, o_events, events);	1027	backend_modify (EV_A_ fd, o_events, anfd->events);
678	}
679	}	1028	}
680		1029
681	fdchangecnt = 0;	1030	fdchangecnt = 0;
682	}	1031	}
683		1032
684	void inline_size	1033	/* something about the given fd changed */
		1034	inline_size void
685	fd_change (EV_P_ int fd, int flags)	1035	fd_change (EV_P_ int fd, int flags)
686	{	1036	{
687	unsigned char reify = anfds [fd].reify;	1037	unsigned char reify = anfds [fd].reify;
688	anfds [fd].reify |= flags;	1038	anfds [fd].reify |= flags;
689		1039
…		…
693	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	1043	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
694	fdchanges [fdchangecnt - 1] = fd;	1044	fdchanges [fdchangecnt - 1] = fd;
695	}	1045	}
696	}	1046	}
697		1047
698	void inline_speed	1048	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		1049	inline_speed void
699	fd_kill (EV_P_ int fd)	1050	fd_kill (EV_P_ int fd)
700	{	1051	{
701	ev_io *w;	1052	ev_io *w;
702		1053
703	while ((w = (ev_io *)anfds [fd].head))	1054	while ((w = (ev_io *)anfds [fd].head))
…		…
705	ev_io_stop (EV_A_ w);	1056	ev_io_stop (EV_A_ w);
706	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	1057	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
707	}	1058	}
708	}	1059	}
709		1060
710	int inline_size	1061	/* check whether the given fd is actually valid, for error recovery */
		1062	inline_size int
711	fd_valid (int fd)	1063	fd_valid (int fd)
712	{	1064	{
713	#ifdef _WIN32	1065	#ifdef _WIN32
714	return _get_osfhandle (fd) != -1;	1066	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
715	#else	1067	#else
716	return fcntl (fd, F_GETFD) != -1;	1068	return fcntl (fd, F_GETFD) != -1;
717	#endif	1069	#endif
718	}	1070	}
719		1071
…		…
723	{	1075	{
724	int fd;	1076	int fd;
725		1077
726	for (fd = 0; fd < anfdmax; ++fd)	1078	for (fd = 0; fd < anfdmax; ++fd)
727	if (anfds [fd].events)	1079	if (anfds [fd].events)
728	if (!fd_valid (fd) == -1 && errno == EBADF)	1080	if (!fd_valid (fd) && errno == EBADF)
729	fd_kill (EV_A_ fd);	1081	fd_kill (EV_A_ fd);
730	}	1082	}
731		1083
732	/* called on ENOMEM in select/poll to kill some fds and retry */	1084	/* called on ENOMEM in select/poll to kill some fds and retry */
733	static void noinline	1085	static void noinline
…		…
737		1089
738	for (fd = anfdmax; fd--; )	1090	for (fd = anfdmax; fd--; )
739	if (anfds [fd].events)	1091	if (anfds [fd].events)
740	{	1092	{
741	fd_kill (EV_A_ fd);	1093	fd_kill (EV_A_ fd);
742	return;	1094	break;
743	}	1095	}
744	}	1096	}
745		1097
746	/* usually called after fork if backend needs to re-arm all fds from scratch */	1098	/* usually called after fork if backend needs to re-arm all fds from scratch */
747	static void noinline	1099	static void noinline
…		…
751		1103
752	for (fd = 0; fd < anfdmax; ++fd)	1104	for (fd = 0; fd < anfdmax; ++fd)
753	if (anfds [fd].events)	1105	if (anfds [fd].events)
754	{	1106	{
755	anfds [fd].events = 0;	1107	anfds [fd].events = 0;
		1108	anfds [fd].emask = 0;
756	fd_change (EV_A_ fd, EV_IOFDSET | 1);	1109	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
757	}	1110	}
758	}	1111	}
759		1112
760	/*****************************************************************************/	1113	/* used to prepare libev internal fd's */
761		1114	/* this is not fork-safe */
762	/* towards the root */	1115	inline_speed void
763	void inline_speed
764	upheap (WT *heap, int k)
765	{
766	WT w = heap [k];
767
768	for (;;)
769	{
770	int p = k >> 1;
771
772	/* maybe we could use a dummy element at heap [0]? */
773	if (!p || heap [p]->at <= w->at)
774	break;
775
776	heap [k] = heap [p];
777	((W)heap [k])->active = k;
778	k = p;
779	}
780
781	heap [k] = w;
782	((W)heap [k])->active = k;
783	}
784
785	/* away from the root */
786	void inline_speed
787	downheap (WT *heap, int N, int k)
788	{
789	WT w = heap [k];
790
791	for (;;)
792	{
793	int c = k << 1;
794
795	if (c > N)
796	break;
797
798	c += c < N && heap [c]->at > heap [c + 1]->at
799	? 1 : 0;
800
801	if (w->at <= heap [c]->at)
802	break;
803
804	heap [k] = heap [c];
805	((W)heap [k])->active = k;
806
807	k = c;
808	}
809
810	heap [k] = w;
811	((W)heap [k])->active = k;
812	}
813
814	void inline_size
815	adjustheap (WT *heap, int N, int k)
816	{
817	upheap (heap, k);
818	downheap (heap, N, k);
819	}
820
821	/*****************************************************************************/
822
823	typedef struct
824	{
825	WL head;
826	EV_ATOMIC_T gotsig;
827	} ANSIG;
828
829	static ANSIG *signals;
830	static int signalmax;
831
832	static EV_ATOMIC_T gotsig;
833
834	void inline_size
835	signals_init (ANSIG *base, int count)
836	{
837	while (count--)
838	{
839	base->head = 0;
840	base->gotsig = 0;
841
842	++base;
843	}
844	}
845
846	/*****************************************************************************/
847
848	void inline_speed
849	fd_intern (int fd)	1116	fd_intern (int fd)
850	{	1117	{
851	#ifdef _WIN32	1118	#ifdef _WIN32
852	int arg = 1;	1119	unsigned long arg = 1;
853	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1120	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
854	#else	1121	#else
855	fcntl (fd, F_SETFD, FD_CLOEXEC);	1122	fcntl (fd, F_SETFD, FD_CLOEXEC);
856	fcntl (fd, F_SETFL, O_NONBLOCK);	1123	fcntl (fd, F_SETFL, O_NONBLOCK);
857	#endif	1124	#endif
858	}	1125	}
859		1126
		1127	/*****************************************************************************/
		1128
		1129	/*
		1130	* the heap functions want a real array index. array index 0 is guaranteed to not
		1131	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		1132	* the branching factor of the d-tree.
		1133	*/
		1134
		1135	/*
		1136	* at the moment we allow libev the luxury of two heaps,
		1137	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		1138	* which is more cache-efficient.
		1139	* the difference is about 5% with 50000+ watchers.
		1140	*/
		1141	#if EV_USE_4HEAP
		1142
		1143	#define DHEAP 4
		1144	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		1145	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		1146	#define UPHEAP_DONE(p,k) ((p) == (k))
		1147
		1148	/* away from the root */
		1149	inline_speed void
		1150	downheap (ANHE *heap, int N, int k)
		1151	{
		1152	ANHE he = heap [k];
		1153	ANHE *E = heap + N + HEAP0;
		1154
		1155	for (;;)
		1156	{
		1157	ev_tstamp minat;
		1158	ANHE *minpos;
		1159	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		1160
		1161	/* find minimum child */
		1162	if (expect_true (pos + DHEAP - 1 < E))
		1163	{
		1164	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1165	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1166	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1167	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1168	}
		1169	else if (pos < E)
		1170	{
		1171	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		1172	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		1173	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		1174	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		1175	}
		1176	else
		1177	break;
		1178
		1179	if (ANHE_at (he) <= minat)
		1180	break;
		1181
		1182	heap [k] = *minpos;
		1183	ev_active (ANHE_w (*minpos)) = k;
		1184
		1185	k = minpos - heap;
		1186	}
		1187
		1188	heap [k] = he;
		1189	ev_active (ANHE_w (he)) = k;
		1190	}
		1191
		1192	#else /* 4HEAP */
		1193
		1194	#define HEAP0 1
		1195	#define HPARENT(k) ((k) >> 1)
		1196	#define UPHEAP_DONE(p,k) (!(p))
		1197
		1198	/* away from the root */
		1199	inline_speed void
		1200	downheap (ANHE *heap, int N, int k)
		1201	{
		1202	ANHE he = heap [k];
		1203
		1204	for (;;)
		1205	{
		1206	int c = k << 1;
		1207
		1208	if (c >= N + HEAP0)
		1209	break;
		1210
		1211	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		1212	? 1 : 0;
		1213
		1214	if (ANHE_at (he) <= ANHE_at (heap [c]))
		1215	break;
		1216
		1217	heap [k] = heap [c];
		1218	ev_active (ANHE_w (heap [k])) = k;
		1219
		1220	k = c;
		1221	}
		1222
		1223	heap [k] = he;
		1224	ev_active (ANHE_w (he)) = k;
		1225	}
		1226	#endif
		1227
		1228	/* towards the root */
		1229	inline_speed void
		1230	upheap (ANHE *heap, int k)
		1231	{
		1232	ANHE he = heap [k];
		1233
		1234	for (;;)
		1235	{
		1236	int p = HPARENT (k);
		1237
		1238	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		1239	break;
		1240
		1241	heap [k] = heap [p];
		1242	ev_active (ANHE_w (heap [k])) = k;
		1243	k = p;
		1244	}
		1245
		1246	heap [k] = he;
		1247	ev_active (ANHE_w (he)) = k;
		1248	}
		1249
		1250	/* move an element suitably so it is in a correct place */
		1251	inline_size void
		1252	adjustheap (ANHE *heap, int N, int k)
		1253	{
		1254	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
		1255	upheap (heap, k);
		1256	else
		1257	downheap (heap, N, k);
		1258	}
		1259
		1260	/* rebuild the heap: this function is used only once and executed rarely */
		1261	inline_size void
		1262	reheap (ANHE *heap, int N)
		1263	{
		1264	int i;
		1265
		1266	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		1267	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		1268	for (i = 0; i < N; ++i)
		1269	upheap (heap, i + HEAP0);
		1270	}
		1271
		1272	/*****************************************************************************/
		1273
		1274	/* associate signal watchers to a signal signal */
		1275	typedef struct
		1276	{
		1277	EV_ATOMIC_T pending;
		1278	#if EV_MULTIPLICITY
		1279	EV_P;
		1280	#endif
		1281	WL head;
		1282	} ANSIG;
		1283
		1284	static ANSIG signals [EV_NSIG - 1];
		1285
		1286	/*****************************************************************************/
		1287
		1288	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
		1289
860	static void noinline	1290	static void noinline
861	evpipe_init (EV_P)	1291	evpipe_init (EV_P)
862	{	1292	{
863	if (!ev_is_active (&pipeev))	1293	if (!ev_is_active (&pipe_w))
864	{	1294	{
865	#if EV_USE_EVENTFD	1295	# if EV_USE_EVENTFD
		1296	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1297	if (evfd < 0 && errno == EINVAL)
866	if ((evfd = eventfd (0, 0)) >= 0)	1298	evfd = eventfd (0, 0);
		1299
		1300	if (evfd >= 0)
867	{	1301	{
868	evpipe [0] = -1;	1302	evpipe [0] = -1;
869	fd_intern (evfd);	1303	fd_intern (evfd); /* doing it twice doesn't hurt */
870	ev_io_set (&pipeev, evfd, EV_READ);	1304	ev_io_set (&pipe_w, evfd, EV_READ);
871	}	1305	}
872	else	1306	else
873	#endif	1307	# endif
874	{	1308	{
875	while (pipe (evpipe))	1309	while (pipe (evpipe))
876	syserr ("(libev) error creating signal/async pipe");	1310	ev_syserr ("(libev) error creating signal/async pipe");
877		1311
878	fd_intern (evpipe [0]);	1312	fd_intern (evpipe [0]);
879	fd_intern (evpipe [1]);	1313	fd_intern (evpipe [1]);
880	ev_io_set (&pipeev, evpipe [0], EV_READ);	1314	ev_io_set (&pipe_w, evpipe [0], EV_READ);
881	}	1315	}
882		1316
883	ev_io_start (EV_A_ &pipeev);	1317	ev_io_start (EV_A_ &pipe_w);
884	ev_unref (EV_A); /* watcher should not keep loop alive */	1318	ev_unref (EV_A); /* watcher should not keep loop alive */
885	}	1319	}
886	}	1320	}
887		1321
888	void inline_size	1322	inline_size void
889	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1323	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
890	{	1324	{
891	if (!*flag)	1325	if (!*flag)
892	{	1326	{
893	int old_errno = errno; /* save errno because write might clobber it */	1327	int old_errno = errno; /* save errno because write might clobber it */
		1328	char dummy;
894		1329
895	*flag = 1;	1330	*flag = 1;
896		1331
897	#if EV_USE_EVENTFD	1332	#if EV_USE_EVENTFD
898	if (evfd >= 0)	1333	if (evfd >= 0)
…		…
900	uint64_t counter = 1;	1335	uint64_t counter = 1;
901	write (evfd, &counter, sizeof (uint64_t));	1336	write (evfd, &counter, sizeof (uint64_t));
902	}	1337	}
903	else	1338	else
904	#endif	1339	#endif
		1340	/* win32 people keep sending patches that change this write() to send() */
		1341	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
		1342	/* so when you think this write should be a send instead, please find out */
		1343	/* where your send() is from - it's definitely not the microsoft send, and */
		1344	/* tell me. thank you. */
905	write (evpipe [1], &old_errno, 1);	1345	write (evpipe [1], &dummy, 1);
906		1346
907	errno = old_errno;	1347	errno = old_errno;
908	}	1348	}
909	}	1349	}
910		1350
		1351	/* called whenever the libev signal pipe */
		1352	/* got some events (signal, async) */
911	static void	1353	static void
912	pipecb (EV_P_ ev_io *iow, int revents)	1354	pipecb (EV_P_ ev_io *iow, int revents)
913	{	1355	{
		1356	int i;
		1357
914	#if EV_USE_EVENTFD	1358	#if EV_USE_EVENTFD
915	if (evfd >= 0)	1359	if (evfd >= 0)
916	{	1360	{
917	uint64_t counter = 1;	1361	uint64_t counter;
918	read (evfd, &counter, sizeof (uint64_t));	1362	read (evfd, &counter, sizeof (uint64_t));
919	}	1363	}
920	else	1364	else
921	#endif	1365	#endif
922	{	1366	{
923	char dummy;	1367	char dummy;
		1368	/* see discussion in evpipe_write when you think this read should be recv in win32 */
924	read (evpipe [0], &dummy, 1);	1369	read (evpipe [0], &dummy, 1);
925	}	1370	}
926		1371
927	if (gotsig && ev_is_default_loop (EV_A))	1372	#if EV_SIGNAL_ENABLE
		1373	if (sig_pending)
928	{	1374	{
929	int signum;	1375	sig_pending = 0;
930	gotsig = 0;
931		1376
932	for (signum = signalmax; signum--; )	1377	for (i = EV_NSIG - 1; i--; )
933	if (signals [signum].gotsig)	1378	if (expect_false (signals [i].pending))
934	ev_feed_signal_event (EV_A_ signum + 1);	1379	ev_feed_signal_event (EV_A_ i + 1);
935	}	1380	}
		1381	#endif
936		1382
937	#if EV_ASYNC_ENABLE	1383	#if EV_ASYNC_ENABLE
938	if (gotasync)	1384	if (async_pending)
939	{	1385	{
940	int i;	1386	async_pending = 0;
941	gotasync = 0;
942		1387
943	for (i = asynccnt; i--; )	1388	for (i = asynccnt; i--; )
944	if (asyncs [i]->sent)	1389	if (asyncs [i]->sent)
945	{	1390	{
946	asyncs [i]->sent = 0;	1391	asyncs [i]->sent = 0;
…		…
950	#endif	1395	#endif
951	}	1396	}
952		1397
953	/*****************************************************************************/	1398	/*****************************************************************************/
954		1399
		1400	void
		1401	ev_feed_signal (int signum)
		1402	{
		1403	#if EV_MULTIPLICITY
		1404	EV_P = signals [signum - 1].loop;
		1405
		1406	if (!EV_A)
		1407	return;
		1408	#endif
		1409
		1410	signals [signum - 1].pending = 1;
		1411	evpipe_write (EV_A_ &sig_pending);
		1412	}
		1413
955	static void	1414	static void
956	ev_sighandler (int signum)	1415	ev_sighandler (int signum)
957	{	1416	{
958	#if EV_MULTIPLICITY
959	struct ev_loop *loop = &default_loop_struct;
960	#endif
961
962	#if _WIN32	1417	#ifdef _WIN32
963	signal (signum, ev_sighandler);	1418	signal (signum, ev_sighandler);
964	#endif	1419	#endif
965		1420
966	signals [signum - 1].gotsig = 1;	1421	ev_feed_signal (signum);
967	evpipe_write (EV_A_ &gotsig);
968	}	1422	}
969		1423
970	void noinline	1424	void noinline
971	ev_feed_signal_event (EV_P_ int signum)	1425	ev_feed_signal_event (EV_P_ int signum)
972	{	1426	{
973	WL w;	1427	WL w;
974		1428
		1429	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1430	return;
		1431
		1432	--signum;
		1433
975	#if EV_MULTIPLICITY	1434	#if EV_MULTIPLICITY
976	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1435	/* it is permissible to try to feed a signal to the wrong loop */
977	#endif	1436	/* or, likely more useful, feeding a signal nobody is waiting for */
978		1437
979	--signum;	1438	if (expect_false (signals [signum].loop != EV_A))
980
981	if (signum < 0 || signum >= signalmax)
982	return;	1439	return;
		1440	#endif
983		1441
984	signals [signum].gotsig = 0;	1442	signals [signum].pending = 0;
985		1443
986	for (w = signals [signum].head; w; w = w->next)	1444	for (w = signals [signum].head; w; w = w->next)
987	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1445	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
988	}	1446	}
989		1447
		1448	#if EV_USE_SIGNALFD
		1449	static void
		1450	sigfdcb (EV_P_ ev_io *iow, int revents)
		1451	{
		1452	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1453
		1454	for (;;)
		1455	{
		1456	ssize_t res = read (sigfd, si, sizeof (si));
		1457
		1458	/* not ISO-C, as res might be -1, but works with SuS */
		1459	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1460	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1461
		1462	if (res < (ssize_t)sizeof (si))
		1463	break;
		1464	}
		1465	}
		1466	#endif
		1467
		1468	#endif
		1469
990	/*****************************************************************************/	1470	/*****************************************************************************/
991		1471
		1472	#if EV_CHILD_ENABLE
992	static WL childs [EV_PID_HASHSIZE];	1473	static WL childs [EV_PID_HASHSIZE];
993
994	#ifndef _WIN32
995		1474
996	static ev_signal childev;	1475	static ev_signal childev;
997		1476
998	#ifndef WIFCONTINUED	1477	#ifndef WIFCONTINUED
999	# define WIFCONTINUED(status) 0	1478	# define WIFCONTINUED(status) 0
1000	#endif	1479	#endif
1001		1480
1002	void inline_speed	1481	/* handle a single child status event */
		1482	inline_speed void
1003	child_reap (EV_P_ int chain, int pid, int status)	1483	child_reap (EV_P_ int chain, int pid, int status)
1004	{	1484	{
1005	ev_child *w;	1485	ev_child *w;
1006	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1486	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1007		1487
1008	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1488	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1009	{	1489	{
1010	if ((w->pid == pid || !w->pid)	1490	if ((w->pid == pid || !w->pid)
1011	&& (!traced || (w->flags & 1)))	1491	&& (!traced || (w->flags & 1)))
1012	{	1492	{
1013	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */	1493	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
…		…
1020		1500
1021	#ifndef WCONTINUED	1501	#ifndef WCONTINUED
1022	# define WCONTINUED 0	1502	# define WCONTINUED 0
1023	#endif	1503	#endif
1024		1504
		1505	/* called on sigchld etc., calls waitpid */
1025	static void	1506	static void
1026	childcb (EV_P_ ev_signal *sw, int revents)	1507	childcb (EV_P_ ev_signal *sw, int revents)
1027	{	1508	{
1028	int pid, status;	1509	int pid, status;
1029		1510
…		…
1037	/* make sure we are called again until all children have been reaped */	1518	/* make sure we are called again until all children have been reaped */
1038	/* we need to do it this way so that the callback gets called before we continue */	1519	/* we need to do it this way so that the callback gets called before we continue */
1039	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1520	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1040		1521
1041	child_reap (EV_A_ pid, pid, status);	1522	child_reap (EV_A_ pid, pid, status);
1042	if (EV_PID_HASHSIZE > 1)	1523	if ((EV_PID_HASHSIZE) > 1)
1043	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1524	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1044	}	1525	}
1045		1526
1046	#endif	1527	#endif
1047		1528
1048	/*****************************************************************************/	1529	/*****************************************************************************/
1049		1530
		1531	#if EV_USE_IOCP
		1532	# include "ev_iocp.c"
		1533	#endif
1050	#if EV_USE_PORT	1534	#if EV_USE_PORT
1051	# include "ev_port.c"	1535	# include "ev_port.c"
1052	#endif	1536	#endif
1053	#if EV_USE_KQUEUE	1537	#if EV_USE_KQUEUE
1054	# include "ev_kqueue.c"	1538	# include "ev_kqueue.c"
…		…
1110	/* kqueue is borked on everything but netbsd apparently */	1594	/* kqueue is borked on everything but netbsd apparently */
1111	/* it usually doesn't work correctly on anything but sockets and pipes */	1595	/* it usually doesn't work correctly on anything but sockets and pipes */
1112	flags &= ~EVBACKEND_KQUEUE;	1596	flags &= ~EVBACKEND_KQUEUE;
1113	#endif	1597	#endif
1114	#ifdef __APPLE__	1598	#ifdef __APPLE__
1115	// flags &= ~EVBACKEND_KQUEUE; for documentation	1599	/* only select works correctly on that "unix-certified" platform */
1116	flags &= ~EVBACKEND_POLL;	1600	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1601	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		1602	#endif
		1603	#ifdef __FreeBSD__
		1604	flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1117	#endif	1605	#endif
1118		1606
1119	return flags;	1607	return flags;
1120	}	1608	}
1121		1609
…		…
1123	ev_embeddable_backends (void)	1611	ev_embeddable_backends (void)
1124	{	1612	{
1125	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;	1613	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1126		1614
1127	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1615	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1128	/* please fix it and tell me how to detect the fix */	1616	if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1129	flags &= ~EVBACKEND_EPOLL;	1617	flags &= ~EVBACKEND_EPOLL;
1130		1618
1131	return flags;	1619	return flags;
1132	}	1620	}
1133		1621
1134	unsigned int	1622	unsigned int
1135	ev_backend (EV_P)	1623	ev_backend (EV_P)
1136	{	1624	{
1137	return backend;	1625	return backend;
1138	}	1626	}
1139		1627
		1628	#if EV_FEATURE_API
1140	unsigned int	1629	unsigned int
1141	ev_loop_count (EV_P)	1630	ev_iteration (EV_P)
1142	{	1631	{
1143	return loop_count;	1632	return loop_count;
1144	}	1633	}
1145		1634
		1635	unsigned int
		1636	ev_depth (EV_P)
		1637	{
		1638	return loop_depth;
		1639	}
		1640
1146	void	1641	void
1147	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1642	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1148	{	1643	{
1149	io_blocktime = interval;	1644	io_blocktime = interval;
1150	}	1645	}
…		…
1153	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1648	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1154	{	1649	{
1155	timeout_blocktime = interval;	1650	timeout_blocktime = interval;
1156	}	1651	}
1157		1652
		1653	void
		1654	ev_set_userdata (EV_P_ void *data)
		1655	{
		1656	userdata = data;
		1657	}
		1658
		1659	void *
		1660	ev_userdata (EV_P)
		1661	{
		1662	return userdata;
		1663	}
		1664
		1665	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1666	{
		1667	invoke_cb = invoke_pending_cb;
		1668	}
		1669
		1670	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1671	{
		1672	release_cb = release;
		1673	acquire_cb = acquire;
		1674	}
		1675	#endif
		1676
		1677	/* initialise a loop structure, must be zero-initialised */
1158	static void noinline	1678	static void noinline
1159	loop_init (EV_P_ unsigned int flags)	1679	loop_init (EV_P_ unsigned int flags)
1160	{	1680	{
1161	if (!backend)	1681	if (!backend)
1162	{	1682	{
		1683	origflags = flags;
		1684
		1685	#if EV_USE_REALTIME
		1686	if (!have_realtime)
		1687	{
		1688	struct timespec ts;
		1689
		1690	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1691	have_realtime = 1;
		1692	}
		1693	#endif
		1694
1163	#if EV_USE_MONOTONIC	1695	#if EV_USE_MONOTONIC
		1696	if (!have_monotonic)
1164	{	1697	{
1165	struct timespec ts;	1698	struct timespec ts;
		1699
1166	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1700	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1167	have_monotonic = 1;	1701	have_monotonic = 1;
1168	}	1702	}
1169	#endif	1703	#endif
		1704
		1705	/* pid check not overridable via env */
		1706	#ifndef _WIN32
		1707	if (flags & EVFLAG_FORKCHECK)
		1708	curpid = getpid ();
		1709	#endif
		1710
		1711	if (!(flags & EVFLAG_NOENV)
		1712	&& !enable_secure ()
		1713	&& getenv ("LIBEV_FLAGS"))
		1714	flags = atoi (getenv ("LIBEV_FLAGS"));
1170		1715
1171	ev_rt_now = ev_time ();	1716	ev_rt_now = ev_time ();
1172	mn_now = get_clock ();	1717	mn_now = get_clock ();
1173	now_floor = mn_now;	1718	now_floor = mn_now;
1174	rtmn_diff = ev_rt_now - mn_now;	1719	rtmn_diff = ev_rt_now - mn_now;
		1720	#if EV_FEATURE_API
		1721	invoke_cb = ev_invoke_pending;
		1722	#endif
1175		1723
1176	io_blocktime = 0.;	1724	io_blocktime = 0.;
1177	timeout_blocktime = 0.;	1725	timeout_blocktime = 0.;
1178	backend = 0;	1726	backend = 0;
1179	backend_fd = -1;	1727	backend_fd = -1;
1180	gotasync = 0;	1728	sig_pending = 0;
		1729	#if EV_ASYNC_ENABLE
		1730	async_pending = 0;
		1731	#endif
1181	#if EV_USE_INOTIFY	1732	#if EV_USE_INOTIFY
1182	fs_fd = -2;	1733	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1183	#endif	1734	#endif
1184		1735	#if EV_USE_SIGNALFD
1185	/* pid check not overridable via env */	1736	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1186	#ifndef _WIN32
1187	if (flags & EVFLAG_FORKCHECK)
1188	curpid = getpid ();
1189	#endif	1737	#endif
1190		1738
1191	if (!(flags & EVFLAG_NOENV)	1739	if (!(flags & EVBACKEND_MASK))
1192	&& !enable_secure ()
1193	&& getenv ("LIBEV_FLAGS"))
1194	flags = atoi (getenv ("LIBEV_FLAGS"));
1195
1196	if (!(flags & 0x0000ffffU))
1197	flags |= ev_recommended_backends ();	1740	flags |= ev_recommended_backends ();
1198		1741
		1742	#if EV_USE_IOCP
		1743	if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
		1744	#endif
1199	#if EV_USE_PORT	1745	#if EV_USE_PORT
1200	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1746	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1201	#endif	1747	#endif
1202	#if EV_USE_KQUEUE	1748	#if EV_USE_KQUEUE
1203	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1749	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
1210	#endif	1756	#endif
1211	#if EV_USE_SELECT	1757	#if EV_USE_SELECT
1212	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1758	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1213	#endif	1759	#endif
1214		1760
		1761	ev_prepare_init (&pending_w, pendingcb);
		1762
		1763	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1215	ev_init (&pipeev, pipecb);	1764	ev_init (&pipe_w, pipecb);
1216	ev_set_priority (&pipeev, EV_MAXPRI);	1765	ev_set_priority (&pipe_w, EV_MAXPRI);
		1766	#endif
1217	}	1767	}
1218	}	1768	}
1219		1769
1220	static void noinline	1770	/* free up a loop structure */
		1771	void
1221	loop_destroy (EV_P)	1772	ev_loop_destroy (EV_P)
1222	{	1773	{
1223	int i;	1774	int i;
1224		1775
		1776	#if EV_MULTIPLICITY
		1777	/* mimic free (0) */
		1778	if (!EV_A)
		1779	return;
		1780	#endif
		1781
		1782	#if EV_CLEANUP_ENABLE
		1783	/* queue cleanup watchers (and execute them) */
		1784	if (expect_false (cleanupcnt))
		1785	{
		1786	queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
		1787	EV_INVOKE_PENDING;
		1788	}
		1789	#endif
		1790
		1791	#if EV_CHILD_ENABLE
		1792	if (ev_is_active (&childev))
		1793	{
		1794	ev_ref (EV_A); /* child watcher */
		1795	ev_signal_stop (EV_A_ &childev);
		1796	}
		1797	#endif
		1798
1225	if (ev_is_active (&pipeev))	1799	if (ev_is_active (&pipe_w))
1226	{	1800	{
1227	ev_ref (EV_A); /* signal watcher */	1801	/*ev_ref (EV_A);*/
1228	ev_io_stop (EV_A_ &pipeev);	1802	/*ev_io_stop (EV_A_ &pipe_w);*/
1229		1803
1230	#if EV_USE_EVENTFD	1804	#if EV_USE_EVENTFD
1231	if (evfd >= 0)	1805	if (evfd >= 0)
1232	close (evfd);	1806	close (evfd);
1233	#endif	1807	#endif
1234		1808
1235	if (evpipe [0] >= 0)	1809	if (evpipe [0] >= 0)
1236	{	1810	{
1237	close (evpipe [0]);	1811	EV_WIN32_CLOSE_FD (evpipe [0]);
1238	close (evpipe [1]);	1812	EV_WIN32_CLOSE_FD (evpipe [1]);
1239	}	1813	}
1240	}	1814	}
		1815
		1816	#if EV_USE_SIGNALFD
		1817	if (ev_is_active (&sigfd_w))
		1818	close (sigfd);
		1819	#endif
1241		1820
1242	#if EV_USE_INOTIFY	1821	#if EV_USE_INOTIFY
1243	if (fs_fd >= 0)	1822	if (fs_fd >= 0)
1244	close (fs_fd);	1823	close (fs_fd);
1245	#endif	1824	#endif
1246		1825
1247	if (backend_fd >= 0)	1826	if (backend_fd >= 0)
1248	close (backend_fd);	1827	close (backend_fd);
1249		1828
		1829	#if EV_USE_IOCP
		1830	if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
		1831	#endif
1250	#if EV_USE_PORT	1832	#if EV_USE_PORT
1251	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1833	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1252	#endif	1834	#endif
1253	#if EV_USE_KQUEUE	1835	#if EV_USE_KQUEUE
1254	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);	1836	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
…		…
1269	#if EV_IDLE_ENABLE	1851	#if EV_IDLE_ENABLE
1270	array_free (idle, [i]);	1852	array_free (idle, [i]);
1271	#endif	1853	#endif
1272	}	1854	}
1273		1855
1274	ev_free (anfds); anfdmax = 0;	1856	ev_free (anfds); anfds = 0; anfdmax = 0;
1275		1857
1276	/* have to use the microsoft-never-gets-it-right macro */	1858	/* have to use the microsoft-never-gets-it-right macro */
		1859	array_free (rfeed, EMPTY);
1277	array_free (fdchange, EMPTY);	1860	array_free (fdchange, EMPTY);
1278	array_free (timer, EMPTY);	1861	array_free (timer, EMPTY);
1279	#if EV_PERIODIC_ENABLE	1862	#if EV_PERIODIC_ENABLE
1280	array_free (periodic, EMPTY);	1863	array_free (periodic, EMPTY);
1281	#endif	1864	#endif
1282	#if EV_FORK_ENABLE	1865	#if EV_FORK_ENABLE
1283	array_free (fork, EMPTY);	1866	array_free (fork, EMPTY);
1284	#endif	1867	#endif
		1868	#if EV_CLEANUP_ENABLE
		1869	array_free (cleanup, EMPTY);
		1870	#endif
1285	array_free (prepare, EMPTY);	1871	array_free (prepare, EMPTY);
1286	array_free (check, EMPTY);	1872	array_free (check, EMPTY);
1287	#if EV_ASYNC_ENABLE	1873	#if EV_ASYNC_ENABLE
1288	array_free (async, EMPTY);	1874	array_free (async, EMPTY);
1289	#endif	1875	#endif
1290		1876
1291	backend = 0;	1877	backend = 0;
		1878
		1879	#if EV_MULTIPLICITY
		1880	if (ev_is_default_loop (EV_A))
		1881	#endif
		1882	ev_default_loop_ptr = 0;
		1883	#if EV_MULTIPLICITY
		1884	else
		1885	ev_free (EV_A);
		1886	#endif
1292	}	1887	}
1293		1888
1294	#if EV_USE_INOTIFY	1889	#if EV_USE_INOTIFY
1295	void inline_size infy_fork (EV_P);	1890	inline_size void infy_fork (EV_P);
1296	#endif	1891	#endif
1297		1892
1298	void inline_size	1893	inline_size void
1299	loop_fork (EV_P)	1894	loop_fork (EV_P)
1300	{	1895	{
1301	#if EV_USE_PORT	1896	#if EV_USE_PORT
1302	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1897	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1303	#endif	1898	#endif
…		…
1309	#endif	1904	#endif
1310	#if EV_USE_INOTIFY	1905	#if EV_USE_INOTIFY
1311	infy_fork (EV_A);	1906	infy_fork (EV_A);
1312	#endif	1907	#endif
1313		1908
1314	if (ev_is_active (&pipeev))	1909	if (ev_is_active (&pipe_w))
1315	{	1910	{
1316	/* this "locks" the handlers against writing to the pipe */	1911	/* this "locks" the handlers against writing to the pipe */
1317	/* while we modify the fd vars */	1912	/* while we modify the fd vars */
1318	gotsig = 1;	1913	sig_pending = 1;
1319	#if EV_ASYNC_ENABLE	1914	#if EV_ASYNC_ENABLE
1320	gotasync = 1;	1915	async_pending = 1;
1321	#endif	1916	#endif
1322		1917
1323	ev_ref (EV_A);	1918	ev_ref (EV_A);
1324	ev_io_stop (EV_A_ &pipeev);	1919	ev_io_stop (EV_A_ &pipe_w);
1325		1920
1326	#if EV_USE_EVENTFD	1921	#if EV_USE_EVENTFD
1327	if (evfd >= 0)	1922	if (evfd >= 0)
1328	close (evfd);	1923	close (evfd);
1329	#endif	1924	#endif
1330		1925
1331	if (evpipe [0] >= 0)	1926	if (evpipe [0] >= 0)
1332	{	1927	{
1333	close (evpipe [0]);	1928	EV_WIN32_CLOSE_FD (evpipe [0]);
1334	close (evpipe [1]);	1929	EV_WIN32_CLOSE_FD (evpipe [1]);
1335	}	1930	}
1336		1931
		1932	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1337	evpipe_init (EV_A);	1933	evpipe_init (EV_A);
1338	/* now iterate over everything, in case we missed something */	1934	/* now iterate over everything, in case we missed something */
1339	pipecb (EV_A_ &pipeev, EV_READ);	1935	pipecb (EV_A_ &pipe_w, EV_READ);
		1936	#endif
1340	}	1937	}
1341		1938
1342	postfork = 0;	1939	postfork = 0;
1343	}	1940	}
		1941
		1942	#if EV_MULTIPLICITY
		1943
		1944	struct ev_loop *
		1945	ev_loop_new (unsigned int flags)
		1946	{
		1947	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1948
		1949	memset (EV_A, 0, sizeof (struct ev_loop));
		1950	loop_init (EV_A_ flags);
		1951
		1952	if (ev_backend (EV_A))
		1953	return EV_A;
		1954
		1955	ev_free (EV_A);
		1956	return 0;
		1957	}
		1958
		1959	#endif /* multiplicity */
		1960
		1961	#if EV_VERIFY
		1962	static void noinline
		1963	verify_watcher (EV_P_ W w)
		1964	{
		1965	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1966
		1967	if (w->pending)
		1968	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1969	}
		1970
		1971	static void noinline
		1972	verify_heap (EV_P_ ANHE *heap, int N)
		1973	{
		1974	int i;
		1975
		1976	for (i = HEAP0; i < N + HEAP0; ++i)
		1977	{
		1978	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1979	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1980	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1981
		1982	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1983	}
		1984	}
		1985
		1986	static void noinline
		1987	array_verify (EV_P_ W *ws, int cnt)
		1988	{
		1989	while (cnt--)
		1990	{
		1991	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1992	verify_watcher (EV_A_ ws [cnt]);
		1993	}
		1994	}
		1995	#endif
		1996
		1997	#if EV_FEATURE_API
		1998	void
		1999	ev_verify (EV_P)
		2000	{
		2001	#if EV_VERIFY
		2002	int i;
		2003	WL w;
		2004
		2005	assert (activecnt >= -1);
		2006
		2007	assert (fdchangemax >= fdchangecnt);
		2008	for (i = 0; i < fdchangecnt; ++i)
		2009	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		2010
		2011	assert (anfdmax >= 0);
		2012	for (i = 0; i < anfdmax; ++i)
		2013	for (w = anfds [i].head; w; w = w->next)
		2014	{
		2015	verify_watcher (EV_A_ (W)w);
		2016	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
		2017	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		2018	}
		2019
		2020	assert (timermax >= timercnt);
		2021	verify_heap (EV_A_ timers, timercnt);
		2022
		2023	#if EV_PERIODIC_ENABLE
		2024	assert (periodicmax >= periodiccnt);
		2025	verify_heap (EV_A_ periodics, periodiccnt);
		2026	#endif
		2027
		2028	for (i = NUMPRI; i--; )
		2029	{
		2030	assert (pendingmax [i] >= pendingcnt [i]);
		2031	#if EV_IDLE_ENABLE
		2032	assert (idleall >= 0);
		2033	assert (idlemax [i] >= idlecnt [i]);
		2034	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		2035	#endif
		2036	}
		2037
		2038	#if EV_FORK_ENABLE
		2039	assert (forkmax >= forkcnt);
		2040	array_verify (EV_A_ (W *)forks, forkcnt);
		2041	#endif
		2042
		2043	#if EV_CLEANUP_ENABLE
		2044	assert (cleanupmax >= cleanupcnt);
		2045	array_verify (EV_A_ (W *)cleanups, cleanupcnt);
		2046	#endif
		2047
		2048	#if EV_ASYNC_ENABLE
		2049	assert (asyncmax >= asynccnt);
		2050	array_verify (EV_A_ (W *)asyncs, asynccnt);
		2051	#endif
		2052
		2053	#if EV_PREPARE_ENABLE
		2054	assert (preparemax >= preparecnt);
		2055	array_verify (EV_A_ (W *)prepares, preparecnt);
		2056	#endif
		2057
		2058	#if EV_CHECK_ENABLE
		2059	assert (checkmax >= checkcnt);
		2060	array_verify (EV_A_ (W *)checks, checkcnt);
		2061	#endif
		2062
		2063	# if 0
		2064	#if EV_CHILD_ENABLE
		2065	for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
		2066	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		2067	#endif
		2068	# endif
		2069	#endif
		2070	}
		2071	#endif
1344		2072
1345	#if EV_MULTIPLICITY	2073	#if EV_MULTIPLICITY
1346	struct ev_loop *	2074	struct ev_loop *
1347	ev_loop_new (unsigned int flags)
1348	{
1349	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1350
1351	memset (loop, 0, sizeof (struct ev_loop));
1352
1353	loop_init (EV_A_ flags);
1354
1355	if (ev_backend (EV_A))
1356	return loop;
1357
1358	return 0;
1359	}
1360
1361	void
1362	ev_loop_destroy (EV_P)
1363	{
1364	loop_destroy (EV_A);
1365	ev_free (loop);
1366	}
1367
1368	void
1369	ev_loop_fork (EV_P)
1370	{
1371	postfork = 1; /* must be in line with ev_default_fork */
1372	}
1373
1374	#endif
1375
1376	#if EV_MULTIPLICITY
1377	struct ev_loop *
1378	ev_default_loop_init (unsigned int flags)
1379	#else	2075	#else
1380	int	2076	int
		2077	#endif
1381	ev_default_loop (unsigned int flags)	2078	ev_default_loop (unsigned int flags)
1382	#endif
1383	{	2079	{
1384	if (!ev_default_loop_ptr)	2080	if (!ev_default_loop_ptr)
1385	{	2081	{
1386	#if EV_MULTIPLICITY	2082	#if EV_MULTIPLICITY
1387	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	2083	EV_P = ev_default_loop_ptr = &default_loop_struct;
1388	#else	2084	#else
1389	ev_default_loop_ptr = 1;	2085	ev_default_loop_ptr = 1;
1390	#endif	2086	#endif
1391		2087
1392	loop_init (EV_A_ flags);	2088	loop_init (EV_A_ flags);
1393		2089
1394	if (ev_backend (EV_A))	2090	if (ev_backend (EV_A))
1395	{	2091	{
1396	#ifndef _WIN32	2092	#if EV_CHILD_ENABLE
1397	ev_signal_init (&childev, childcb, SIGCHLD);	2093	ev_signal_init (&childev, childcb, SIGCHLD);
1398	ev_set_priority (&childev, EV_MAXPRI);	2094	ev_set_priority (&childev, EV_MAXPRI);
1399	ev_signal_start (EV_A_ &childev);	2095	ev_signal_start (EV_A_ &childev);
1400	ev_unref (EV_A); /* child watcher should not keep loop alive */	2096	ev_unref (EV_A); /* child watcher should not keep loop alive */
1401	#endif	2097	#endif
…		…
1406		2102
1407	return ev_default_loop_ptr;	2103	return ev_default_loop_ptr;
1408	}	2104	}
1409		2105
1410	void	2106	void
1411	ev_default_destroy (void)	2107	ev_loop_fork (EV_P)
1412	{	2108	{
1413	#if EV_MULTIPLICITY
1414	struct ev_loop *loop = ev_default_loop_ptr;
1415	#endif
1416
1417	#ifndef _WIN32
1418	ev_ref (EV_A); /* child watcher */
1419	ev_signal_stop (EV_A_ &childev);
1420	#endif
1421
1422	loop_destroy (EV_A);
1423	}
1424
1425	void
1426	ev_default_fork (void)
1427	{
1428	#if EV_MULTIPLICITY
1429	struct ev_loop *loop = ev_default_loop_ptr;
1430	#endif
1431
1432	if (backend)
1433	postfork = 1; /* must be in line with ev_loop_fork */	2109	postfork = 1; /* must be in line with ev_default_fork */
1434	}	2110	}
1435		2111
1436	/*****************************************************************************/	2112	/*****************************************************************************/
1437		2113
1438	void	2114	void
1439	ev_invoke (EV_P_ void *w, int revents)	2115	ev_invoke (EV_P_ void *w, int revents)
1440	{	2116	{
1441	EV_CB_INVOKE ((W)w, revents);	2117	EV_CB_INVOKE ((W)w, revents);
1442	}	2118	}
1443		2119
1444	void inline_speed	2120	unsigned int
1445	call_pending (EV_P)	2121	ev_pending_count (EV_P)
		2122	{
		2123	int pri;
		2124	unsigned int count = 0;
		2125
		2126	for (pri = NUMPRI; pri--; )
		2127	count += pendingcnt [pri];
		2128
		2129	return count;
		2130	}
		2131
		2132	void noinline
		2133	ev_invoke_pending (EV_P)
1446	{	2134	{
1447	int pri;	2135	int pri;
1448		2136
1449	for (pri = NUMPRI; pri--; )	2137	for (pri = NUMPRI; pri--; )
1450	while (pendingcnt [pri])	2138	while (pendingcnt [pri])
1451	{	2139	{
1452	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	2140	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1453		2141
1454	if (expect_true (p->w))
1455	{
1456	/*assert (("non-pending watcher on pending list", p->w->pending));*/
1457
1458	p->w->pending = 0;	2142	p->w->pending = 0;
1459	EV_CB_INVOKE (p->w, p->events);	2143	EV_CB_INVOKE (p->w, p->events);
1460	}	2144	EV_FREQUENT_CHECK;
1461	}	2145	}
1462	}	2146	}
1463		2147
1464	void inline_size
1465	timers_reify (EV_P)
1466	{
1467	while (timercnt && ev_at (timers [1]) <= mn_now)
1468	{
1469	ev_timer *w = (ev_timer *)timers [1];
1470
1471	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1472
1473	/* first reschedule or stop timer */
1474	if (w->repeat)
1475	{
1476	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1477
1478	ev_at (w) += w->repeat;
1479	if (ev_at (w) < mn_now)
1480	ev_at (w) = mn_now;
1481
1482	downheap (timers, timercnt, 1);
1483	}
1484	else
1485	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1486
1487	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1488	}
1489	}
1490
1491	#if EV_PERIODIC_ENABLE
1492	void inline_size
1493	periodics_reify (EV_P)
1494	{
1495	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1496	{
1497	ev_periodic *w = (ev_periodic *)periodics [1];
1498
1499	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1500
1501	/* first reschedule or stop timer */
1502	if (w->reschedule_cb)
1503	{
1504	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1505	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1506	downheap (periodics, periodiccnt, 1);
1507	}
1508	else if (w->interval)
1509	{
1510	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1512	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1513	downheap (periodics, periodiccnt, 1);
1514	}
1515	else
1516	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1517
1518	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1519	}
1520	}
1521
1522	static void noinline
1523	periodics_reschedule (EV_P)
1524	{
1525	int i;
1526
1527	/* adjust periodics after time jump */
1528	for (i = 0; i < periodiccnt; ++i)
1529	{
1530	ev_periodic *w = (ev_periodic *)periodics [i];
1531
1532	if (w->reschedule_cb)
1533	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1534	else if (w->interval)
1535	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1536	}
1537
1538	/* now rebuild the heap */
1539	for (i = periodiccnt >> 1; i--; )
1540	downheap (periodics, periodiccnt, i);
1541	}
1542	#endif
1543
1544	#if EV_IDLE_ENABLE	2148	#if EV_IDLE_ENABLE
1545	void inline_size	2149	/* make idle watchers pending. this handles the "call-idle */
		2150	/* only when higher priorities are idle" logic */
		2151	inline_size void
1546	idle_reify (EV_P)	2152	idle_reify (EV_P)
1547	{	2153	{
1548	if (expect_false (idleall))	2154	if (expect_false (idleall))
1549	{	2155	{
1550	int pri;	2156	int pri;
…		…
1562	}	2168	}
1563	}	2169	}
1564	}	2170	}
1565	#endif	2171	#endif
1566		2172
1567	void inline_speed	2173	/* make timers pending */
		2174	inline_size void
		2175	timers_reify (EV_P)
		2176	{
		2177	EV_FREQUENT_CHECK;
		2178
		2179	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		2180	{
		2181	do
		2182	{
		2183	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		2184
		2185	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		2186
		2187	/* first reschedule or stop timer */
		2188	if (w->repeat)
		2189	{
		2190	ev_at (w) += w->repeat;
		2191	if (ev_at (w) < mn_now)
		2192	ev_at (w) = mn_now;
		2193
		2194	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		2195
		2196	ANHE_at_cache (timers [HEAP0]);
		2197	downheap (timers, timercnt, HEAP0);
		2198	}
		2199	else
		2200	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2201
		2202	EV_FREQUENT_CHECK;
		2203	feed_reverse (EV_A_ (W)w);
		2204	}
		2205	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
		2206
		2207	feed_reverse_done (EV_A_ EV_TIMER);
		2208	}
		2209	}
		2210
		2211	#if EV_PERIODIC_ENABLE
		2212
		2213	inline_speed void
		2214	periodic_recalc (EV_P_ ev_periodic *w)
		2215	{
		2216	/* TODO: use slow but potentially more correct incremental algo, */
		2217	/* also do not rely on ceil */
		2218	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2219	}
		2220
		2221	/* make periodics pending */
		2222	inline_size void
		2223	periodics_reify (EV_P)
		2224	{
		2225	EV_FREQUENT_CHECK;
		2226
		2227	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		2228	{
		2229	int feed_count = 0;
		2230
		2231	do
		2232	{
		2233	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2234
		2235	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		2236
		2237	/* first reschedule or stop timer */
		2238	if (w->reschedule_cb)
		2239	{
		2240	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2241
		2242	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		2243
		2244	ANHE_at_cache (periodics [HEAP0]);
		2245	downheap (periodics, periodiccnt, HEAP0);
		2246	}
		2247	else if (w->interval)
		2248	{
		2249	periodic_recalc (EV_A_ w);
		2250
		2251	/* if next trigger time is not sufficiently in the future, put it there */
		2252	/* this might happen because of floating point inexactness */
		2253	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2254	{
		2255	ev_at (w) += w->interval;
		2256
		2257	/* if interval is unreasonably low we might still have a time in the past */
		2258	/* so correct this. this will make the periodic very inexact, but the user */
		2259	/* has effectively asked to get triggered more often than possible */
		2260	if (ev_at (w) < ev_rt_now)
		2261	ev_at (w) = ev_rt_now;
		2262	}
		2263
		2264	ANHE_at_cache (periodics [HEAP0]);
		2265	downheap (periodics, periodiccnt, HEAP0);
		2266	}
		2267	else
		2268	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2269
		2270	EV_FREQUENT_CHECK;
		2271	feed_reverse (EV_A_ (W)w);
		2272	}
		2273	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		2274
		2275	feed_reverse_done (EV_A_ EV_PERIODIC);
		2276	}
		2277	}
		2278
		2279	/* simply recalculate all periodics */
		2280	/* TODO: maybe ensure that at least one event happens when jumping forward? */
		2281	static void noinline
		2282	periodics_reschedule (EV_P)
		2283	{
		2284	int i;
		2285
		2286	/* adjust periodics after time jump */
		2287	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		2288	{
		2289	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		2290
		2291	if (w->reschedule_cb)
		2292	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2293	else if (w->interval)
		2294	periodic_recalc (EV_A_ w);
		2295
		2296	ANHE_at_cache (periodics [i]);
		2297	}
		2298
		2299	reheap (periodics, periodiccnt);
		2300	}
		2301	#endif
		2302
		2303	/* adjust all timers by a given offset */
		2304	static void noinline
		2305	timers_reschedule (EV_P_ ev_tstamp adjust)
		2306	{
		2307	int i;
		2308
		2309	for (i = 0; i < timercnt; ++i)
		2310	{
		2311	ANHE *he = timers + i + HEAP0;
		2312	ANHE_w (*he)->at += adjust;
		2313	ANHE_at_cache (*he);
		2314	}
		2315	}
		2316
		2317	/* fetch new monotonic and realtime times from the kernel */
		2318	/* also detect if there was a timejump, and act accordingly */
		2319	inline_speed void
1568	time_update (EV_P_ ev_tstamp max_block)	2320	time_update (EV_P_ ev_tstamp max_block)
1569	{	2321	{
1570	int i;
1571
1572	#if EV_USE_MONOTONIC	2322	#if EV_USE_MONOTONIC
1573	if (expect_true (have_monotonic))	2323	if (expect_true (have_monotonic))
1574	{	2324	{
		2325	int i;
1575	ev_tstamp odiff = rtmn_diff;	2326	ev_tstamp odiff = rtmn_diff;
1576		2327
1577	mn_now = get_clock ();	2328	mn_now = get_clock ();
1578		2329
1579	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2330	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1597	*/	2348	*/
1598	for (i = 4; --i; )	2349	for (i = 4; --i; )
1599	{	2350	{
1600	rtmn_diff = ev_rt_now - mn_now;	2351	rtmn_diff = ev_rt_now - mn_now;
1601		2352
1602	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	2353	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1603	return; /* all is well */	2354	return; /* all is well */
1604		2355
1605	ev_rt_now = ev_time ();	2356	ev_rt_now = ev_time ();
1606	mn_now = get_clock ();	2357	mn_now = get_clock ();
1607	now_floor = mn_now;	2358	now_floor = mn_now;
1608	}	2359	}
1609		2360
		2361	/* no timer adjustment, as the monotonic clock doesn't jump */
		2362	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1610	# if EV_PERIODIC_ENABLE	2363	# if EV_PERIODIC_ENABLE
1611	periodics_reschedule (EV_A);	2364	periodics_reschedule (EV_A);
1612	# endif	2365	# endif
1613	/* no timer adjustment, as the monotonic clock doesn't jump */
1614	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1615	}	2366	}
1616	else	2367	else
1617	#endif	2368	#endif
1618	{	2369	{
1619	ev_rt_now = ev_time ();	2370	ev_rt_now = ev_time ();
1620		2371
1621	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2372	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1622	{	2373	{
		2374	/* adjust timers. this is easy, as the offset is the same for all of them */
		2375	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1623	#if EV_PERIODIC_ENABLE	2376	#if EV_PERIODIC_ENABLE
1624	periodics_reschedule (EV_A);	2377	periodics_reschedule (EV_A);
1625	#endif	2378	#endif
1626	/* adjust timers. this is easy, as the offset is the same for all of them */
1627	for (i = 1; i <= timercnt; ++i)
1628	ev_at (timers [i]) += ev_rt_now - mn_now;
1629	}	2379	}
1630		2380
1631	mn_now = ev_rt_now;	2381	mn_now = ev_rt_now;
1632	}	2382	}
1633	}	2383	}
1634		2384
1635	void	2385	void
1636	ev_ref (EV_P)
1637	{
1638	++activecnt;
1639	}
1640
1641	void
1642	ev_unref (EV_P)
1643	{
1644	--activecnt;
1645	}
1646
1647	static int loop_done;
1648
1649	void
1650	ev_loop (EV_P_ int flags)	2386	ev_run (EV_P_ int flags)
1651	{	2387	{
		2388	#if EV_FEATURE_API
		2389	++loop_depth;
		2390	#endif
		2391
		2392	assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
		2393
1652	loop_done = EVUNLOOP_CANCEL;	2394	loop_done = EVBREAK_CANCEL;
1653		2395
1654	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2396	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1655		2397
1656	do	2398	do
1657	{	2399	{
		2400	#if EV_VERIFY >= 2
		2401	ev_verify (EV_A);
		2402	#endif
		2403
1658	#ifndef _WIN32	2404	#ifndef _WIN32
1659	if (expect_false (curpid)) /* penalise the forking check even more */	2405	if (expect_false (curpid)) /* penalise the forking check even more */
1660	if (expect_false (getpid () != curpid))	2406	if (expect_false (getpid () != curpid))
1661	{	2407	{
1662	curpid = getpid ();	2408	curpid = getpid ();
…		…
1668	/* we might have forked, so queue fork handlers */	2414	/* we might have forked, so queue fork handlers */
1669	if (expect_false (postfork))	2415	if (expect_false (postfork))
1670	if (forkcnt)	2416	if (forkcnt)
1671	{	2417	{
1672	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2418	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1673	call_pending (EV_A);	2419	EV_INVOKE_PENDING;
1674	}	2420	}
1675	#endif	2421	#endif
1676		2422
		2423	#if EV_PREPARE_ENABLE
1677	/* queue prepare watchers (and execute them) */	2424	/* queue prepare watchers (and execute them) */
1678	if (expect_false (preparecnt))	2425	if (expect_false (preparecnt))
1679	{	2426	{
1680	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2427	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1681	call_pending (EV_A);	2428	EV_INVOKE_PENDING;
1682	}	2429	}
		2430	#endif
1683		2431
1684	if (expect_false (!activecnt))	2432	if (expect_false (loop_done))
1685	break;	2433	break;
1686		2434
1687	/* we might have forked, so reify kernel state if necessary */	2435	/* we might have forked, so reify kernel state if necessary */
1688	if (expect_false (postfork))	2436	if (expect_false (postfork))
1689	loop_fork (EV_A);	2437	loop_fork (EV_A);
…		…
1694	/* calculate blocking time */	2442	/* calculate blocking time */
1695	{	2443	{
1696	ev_tstamp waittime = 0.;	2444	ev_tstamp waittime = 0.;
1697	ev_tstamp sleeptime = 0.;	2445	ev_tstamp sleeptime = 0.;
1698		2446
		2447	/* remember old timestamp for io_blocktime calculation */
		2448	ev_tstamp prev_mn_now = mn_now;
		2449
		2450	/* update time to cancel out callback processing overhead */
		2451	time_update (EV_A_ 1e100);
		2452
1699	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2453	if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1700	{	2454	{
1701	/* update time to cancel out callback processing overhead */
1702	time_update (EV_A_ 1e100);
1703
1704	waittime = MAX_BLOCKTIME;	2455	waittime = MAX_BLOCKTIME;
1705		2456
1706	if (timercnt)	2457	if (timercnt)
1707	{	2458	{
1708	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;	2459	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1709	if (waittime > to) waittime = to;	2460	if (waittime > to) waittime = to;
1710	}	2461	}
1711		2462
1712	#if EV_PERIODIC_ENABLE	2463	#if EV_PERIODIC_ENABLE
1713	if (periodiccnt)	2464	if (periodiccnt)
1714	{	2465	{
1715	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;	2466	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1716	if (waittime > to) waittime = to;	2467	if (waittime > to) waittime = to;
1717	}	2468	}
1718	#endif	2469	#endif
1719		2470
		2471	/* don't let timeouts decrease the waittime below timeout_blocktime */
1720	if (expect_false (waittime < timeout_blocktime))	2472	if (expect_false (waittime < timeout_blocktime))
1721	waittime = timeout_blocktime;	2473	waittime = timeout_blocktime;
1722		2474
1723	sleeptime = waittime - backend_fudge;	2475	/* extra check because io_blocktime is commonly 0 */
1724
1725	if (expect_true (sleeptime > io_blocktime))	2476	if (expect_false (io_blocktime))
1726	sleeptime = io_blocktime;
1727
1728	if (sleeptime)
1729	{	2477	{
		2478	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2479
		2480	if (sleeptime > waittime - backend_fudge)
		2481	sleeptime = waittime - backend_fudge;
		2482
		2483	if (expect_true (sleeptime > 0.))
		2484	{
1730	ev_sleep (sleeptime);	2485	ev_sleep (sleeptime);
1731	waittime -= sleeptime;	2486	waittime -= sleeptime;
		2487	}
1732	}	2488	}
1733	}	2489	}
1734		2490
		2491	#if EV_FEATURE_API
1735	++loop_count;	2492	++loop_count;
		2493	#endif
		2494	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1736	backend_poll (EV_A_ waittime);	2495	backend_poll (EV_A_ waittime);
		2496	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1737		2497
1738	/* update ev_rt_now, do magic */	2498	/* update ev_rt_now, do magic */
1739	time_update (EV_A_ waittime + sleeptime);	2499	time_update (EV_A_ waittime + sleeptime);
1740	}	2500	}
1741		2501
…		…
1748	#if EV_IDLE_ENABLE	2508	#if EV_IDLE_ENABLE
1749	/* queue idle watchers unless other events are pending */	2509	/* queue idle watchers unless other events are pending */
1750	idle_reify (EV_A);	2510	idle_reify (EV_A);
1751	#endif	2511	#endif
1752		2512
		2513	#if EV_CHECK_ENABLE
1753	/* queue check watchers, to be executed first */	2514	/* queue check watchers, to be executed first */
1754	if (expect_false (checkcnt))	2515	if (expect_false (checkcnt))
1755	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2516	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2517	#endif
1756		2518
1757	call_pending (EV_A);	2519	EV_INVOKE_PENDING;
1758	}	2520	}
1759	while (expect_true (	2521	while (expect_true (
1760	activecnt	2522	activecnt
1761	&& !loop_done	2523	&& !loop_done
1762	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2524	&& !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1763	));	2525	));
1764		2526
1765	if (loop_done == EVUNLOOP_ONE)	2527	if (loop_done == EVBREAK_ONE)
1766	loop_done = EVUNLOOP_CANCEL;	2528	loop_done = EVBREAK_CANCEL;
1767	}
1768		2529
		2530	#if EV_FEATURE_API
		2531	--loop_depth;
		2532	#endif
		2533	}
		2534
1769	void	2535	void
1770	ev_unloop (EV_P_ int how)	2536	ev_break (EV_P_ int how)
1771	{	2537	{
1772	loop_done = how;	2538	loop_done = how;
1773	}	2539	}
1774		2540
		2541	void
		2542	ev_ref (EV_P)
		2543	{
		2544	++activecnt;
		2545	}
		2546
		2547	void
		2548	ev_unref (EV_P)
		2549	{
		2550	--activecnt;
		2551	}
		2552
		2553	void
		2554	ev_now_update (EV_P)
		2555	{
		2556	time_update (EV_A_ 1e100);
		2557	}
		2558
		2559	void
		2560	ev_suspend (EV_P)
		2561	{
		2562	ev_now_update (EV_A);
		2563	}
		2564
		2565	void
		2566	ev_resume (EV_P)
		2567	{
		2568	ev_tstamp mn_prev = mn_now;
		2569
		2570	ev_now_update (EV_A);
		2571	timers_reschedule (EV_A_ mn_now - mn_prev);
		2572	#if EV_PERIODIC_ENABLE
		2573	/* TODO: really do this? */
		2574	periodics_reschedule (EV_A);
		2575	#endif
		2576	}
		2577
1775	/*****************************************************************************/	2578	/*****************************************************************************/
		2579	/* singly-linked list management, used when the expected list length is short */
1776		2580
1777	void inline_size	2581	inline_size void
1778	wlist_add (WL *head, WL elem)	2582	wlist_add (WL *head, WL elem)
1779	{	2583	{
1780	elem->next = *head;	2584	elem->next = *head;
1781	*head = elem;	2585	*head = elem;
1782	}	2586	}
1783		2587
1784	void inline_size	2588	inline_size void
1785	wlist_del (WL *head, WL elem)	2589	wlist_del (WL *head, WL elem)
1786	{	2590	{
1787	while (*head)	2591	while (*head)
1788	{	2592	{
1789	if (*head == elem)	2593	if (expect_true (*head == elem))
1790	{	2594	{
1791	*head = elem->next;	2595	*head = elem->next;
1792	return;	2596	break;
1793	}	2597	}
1794		2598
1795	head = &(*head)->next;	2599	head = &(*head)->next;
1796	}	2600	}
1797	}	2601	}
1798		2602
1799	void inline_speed	2603	/* internal, faster, version of ev_clear_pending */
		2604	inline_speed void
1800	clear_pending (EV_P_ W w)	2605	clear_pending (EV_P_ W w)
1801	{	2606	{
1802	if (w->pending)	2607	if (w->pending)
1803	{	2608	{
1804	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2609	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1805	w->pending = 0;	2610	w->pending = 0;
1806	}	2611	}
1807	}	2612	}
1808		2613
1809	int	2614	int
…		…
1813	int pending = w_->pending;	2618	int pending = w_->pending;
1814		2619
1815	if (expect_true (pending))	2620	if (expect_true (pending))
1816	{	2621	{
1817	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2622	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2623	p->w = (W)&pending_w;
1818	w_->pending = 0;	2624	w_->pending = 0;
1819	p->w = 0;
1820	return p->events;	2625	return p->events;
1821	}	2626	}
1822	else	2627	else
1823	return 0;	2628	return 0;
1824	}	2629	}
1825		2630
1826	void inline_size	2631	inline_size void
1827	pri_adjust (EV_P_ W w)	2632	pri_adjust (EV_P_ W w)
1828	{	2633	{
1829	int pri = w->priority;	2634	int pri = ev_priority (w);
1830	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2635	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1831	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2636	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1832	w->priority = pri;	2637	ev_set_priority (w, pri);
1833	}	2638	}
1834		2639
1835	void inline_speed	2640	inline_speed void
1836	ev_start (EV_P_ W w, int active)	2641	ev_start (EV_P_ W w, int active)
1837	{	2642	{
1838	pri_adjust (EV_A_ w);	2643	pri_adjust (EV_A_ w);
1839	w->active = active;	2644	w->active = active;
1840	ev_ref (EV_A);	2645	ev_ref (EV_A);
1841	}	2646	}
1842		2647
1843	void inline_size	2648	inline_size void
1844	ev_stop (EV_P_ W w)	2649	ev_stop (EV_P_ W w)
1845	{	2650	{
1846	ev_unref (EV_A);	2651	ev_unref (EV_A);
1847	w->active = 0;	2652	w->active = 0;
1848	}	2653	}
…		…
1855	int fd = w->fd;	2660	int fd = w->fd;
1856		2661
1857	if (expect_false (ev_is_active (w)))	2662	if (expect_false (ev_is_active (w)))
1858	return;	2663	return;
1859		2664
1860	assert (("ev_io_start called with negative fd", fd >= 0));	2665	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2666	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		2667
		2668	EV_FREQUENT_CHECK;
1861		2669
1862	ev_start (EV_A_ (W)w, 1);	2670	ev_start (EV_A_ (W)w, 1);
1863	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2671	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1864	wlist_add (&anfds[fd].head, (WL)w);	2672	wlist_add (&anfds[fd].head, (WL)w);
1865		2673
1866	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2674	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1867	w->events &= ~EV_IOFDSET;	2675	w->events &= ~EV__IOFDSET;
		2676
		2677	EV_FREQUENT_CHECK;
1868	}	2678	}
1869		2679
1870	void noinline	2680	void noinline
1871	ev_io_stop (EV_P_ ev_io *w)	2681	ev_io_stop (EV_P_ ev_io *w)
1872	{	2682	{
1873	clear_pending (EV_A_ (W)w);	2683	clear_pending (EV_A_ (W)w);
1874	if (expect_false (!ev_is_active (w)))	2684	if (expect_false (!ev_is_active (w)))
1875	return;	2685	return;
1876		2686
1877	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2687	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2688
		2689	EV_FREQUENT_CHECK;
1878		2690
1879	wlist_del (&anfds[w->fd].head, (WL)w);	2691	wlist_del (&anfds[w->fd].head, (WL)w);
1880	ev_stop (EV_A_ (W)w);	2692	ev_stop (EV_A_ (W)w);
1881		2693
1882	fd_change (EV_A_ w->fd, 1);	2694	fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
		2695
		2696	EV_FREQUENT_CHECK;
1883	}	2697	}
1884		2698
1885	void noinline	2699	void noinline
1886	ev_timer_start (EV_P_ ev_timer *w)	2700	ev_timer_start (EV_P_ ev_timer *w)
1887	{	2701	{
1888	if (expect_false (ev_is_active (w)))	2702	if (expect_false (ev_is_active (w)))
1889	return;	2703	return;
1890		2704
1891	ev_at (w) += mn_now;	2705	ev_at (w) += mn_now;
1892		2706
1893	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2707	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1894		2708
		2709	EV_FREQUENT_CHECK;
		2710
		2711	++timercnt;
1895	ev_start (EV_A_ (W)w, ++timercnt);	2712	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1896	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);	2713	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1897	timers [timercnt] = (WT)w;	2714	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2715	ANHE_at_cache (timers [ev_active (w)]);
1898	upheap (timers, timercnt);	2716	upheap (timers, ev_active (w));
1899		2717
		2718	EV_FREQUENT_CHECK;
		2719
1900	/*assert (("internal timer heap corruption", timers [((W)w)->active] == w));*/	2720	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1901	}	2721	}
1902		2722
1903	void noinline	2723	void noinline
1904	ev_timer_stop (EV_P_ ev_timer *w)	2724	ev_timer_stop (EV_P_ ev_timer *w)
1905	{	2725	{
1906	clear_pending (EV_A_ (W)w);	2726	clear_pending (EV_A_ (W)w);
1907	if (expect_false (!ev_is_active (w)))	2727	if (expect_false (!ev_is_active (w)))
1908	return;	2728	return;
1909		2729
1910	assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w));	2730	EV_FREQUENT_CHECK;
1911		2731
1912	{	2732	{
1913	int active = ((W)w)->active;	2733	int active = ev_active (w);
1914		2734
		2735	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2736
		2737	--timercnt;
		2738
1915	if (expect_true (active < timercnt))	2739	if (expect_true (active < timercnt + HEAP0))
1916	{	2740	{
1917	timers [active] = timers [timercnt];	2741	timers [active] = timers [timercnt + HEAP0];
1918	adjustheap (timers, timercnt, active);	2742	adjustheap (timers, timercnt, active);
1919	}	2743	}
1920
1921	--timercnt;
1922	}	2744	}
1923		2745
1924	ev_at (w) -= mn_now;	2746	ev_at (w) -= mn_now;
1925		2747
1926	ev_stop (EV_A_ (W)w);	2748	ev_stop (EV_A_ (W)w);
		2749
		2750	EV_FREQUENT_CHECK;
1927	}	2751	}
1928		2752
1929	void noinline	2753	void noinline
1930	ev_timer_again (EV_P_ ev_timer *w)	2754	ev_timer_again (EV_P_ ev_timer *w)
1931	{	2755	{
		2756	EV_FREQUENT_CHECK;
		2757
1932	if (ev_is_active (w))	2758	if (ev_is_active (w))
1933	{	2759	{
1934	if (w->repeat)	2760	if (w->repeat)
1935	{	2761	{
1936	ev_at (w) = mn_now + w->repeat;	2762	ev_at (w) = mn_now + w->repeat;
		2763	ANHE_at_cache (timers [ev_active (w)]);
1937	adjustheap (timers, timercnt, ((W)w)->active);	2764	adjustheap (timers, timercnt, ev_active (w));
1938	}	2765	}
1939	else	2766	else
1940	ev_timer_stop (EV_A_ w);	2767	ev_timer_stop (EV_A_ w);
1941	}	2768	}
1942	else if (w->repeat)	2769	else if (w->repeat)
1943	{	2770	{
1944	ev_at (w) = w->repeat;	2771	ev_at (w) = w->repeat;
1945	ev_timer_start (EV_A_ w);	2772	ev_timer_start (EV_A_ w);
1946	}	2773	}
		2774
		2775	EV_FREQUENT_CHECK;
		2776	}
		2777
		2778	ev_tstamp
		2779	ev_timer_remaining (EV_P_ ev_timer *w)
		2780	{
		2781	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1947	}	2782	}
1948		2783
1949	#if EV_PERIODIC_ENABLE	2784	#if EV_PERIODIC_ENABLE
1950	void noinline	2785	void noinline
1951	ev_periodic_start (EV_P_ ev_periodic *w)	2786	ev_periodic_start (EV_P_ ev_periodic *w)
…		…
1955		2790
1956	if (w->reschedule_cb)	2791	if (w->reschedule_cb)
1957	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2792	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1958	else if (w->interval)	2793	else if (w->interval)
1959	{	2794	{
1960	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2795	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1961	/* this formula differs from the one in periodic_reify because we do not always round up */	2796	periodic_recalc (EV_A_ w);
1962	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1963	}	2797	}
1964	else	2798	else
1965	ev_at (w) = w->offset;	2799	ev_at (w) = w->offset;
1966		2800
		2801	EV_FREQUENT_CHECK;
		2802
		2803	++periodiccnt;
1967	ev_start (EV_A_ (W)w, ++periodiccnt);	2804	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1968	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);	2805	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1969	periodics [periodiccnt] = (WT)w;	2806	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1970	upheap (periodics, periodiccnt);	2807	ANHE_at_cache (periodics [ev_active (w)]);
		2808	upheap (periodics, ev_active (w));
1971		2809
		2810	EV_FREQUENT_CHECK;
		2811
1972	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/	2812	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1973	}	2813	}
1974		2814
1975	void noinline	2815	void noinline
1976	ev_periodic_stop (EV_P_ ev_periodic *w)	2816	ev_periodic_stop (EV_P_ ev_periodic *w)
1977	{	2817	{
1978	clear_pending (EV_A_ (W)w);	2818	clear_pending (EV_A_ (W)w);
1979	if (expect_false (!ev_is_active (w)))	2819	if (expect_false (!ev_is_active (w)))
1980	return;	2820	return;
1981		2821
1982	assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w));	2822	EV_FREQUENT_CHECK;
1983		2823
1984	{	2824	{
1985	int active = ((W)w)->active;	2825	int active = ev_active (w);
1986		2826
		2827	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2828
		2829	--periodiccnt;
		2830
1987	if (expect_true (active < periodiccnt))	2831	if (expect_true (active < periodiccnt + HEAP0))
1988	{	2832	{
1989	periodics [active] = periodics [periodiccnt];	2833	periodics [active] = periodics [periodiccnt + HEAP0];
1990	adjustheap (periodics, periodiccnt, active);	2834	adjustheap (periodics, periodiccnt, active);
1991	}	2835	}
1992
1993	--periodiccnt;
1994	}	2836	}
1995		2837
1996	ev_stop (EV_A_ (W)w);	2838	ev_stop (EV_A_ (W)w);
		2839
		2840	EV_FREQUENT_CHECK;
1997	}	2841	}
1998		2842
1999	void noinline	2843	void noinline
2000	ev_periodic_again (EV_P_ ev_periodic *w)	2844	ev_periodic_again (EV_P_ ev_periodic *w)
2001	{	2845	{
…		…
2007		2851
2008	#ifndef SA_RESTART	2852	#ifndef SA_RESTART
2009	# define SA_RESTART 0	2853	# define SA_RESTART 0
2010	#endif	2854	#endif
2011		2855
		2856	#if EV_SIGNAL_ENABLE
		2857
2012	void noinline	2858	void noinline
2013	ev_signal_start (EV_P_ ev_signal *w)	2859	ev_signal_start (EV_P_ ev_signal *w)
2014	{	2860	{
2015	#if EV_MULTIPLICITY
2016	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2017	#endif
2018	if (expect_false (ev_is_active (w)))	2861	if (expect_false (ev_is_active (w)))
2019	return;	2862	return;
2020		2863
2021	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2864	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2022		2865
2023	evpipe_init (EV_A);	2866	#if EV_MULTIPLICITY
		2867	assert (("libev: a signal must not be attached to two different loops",
		2868	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2024		2869
		2870	signals [w->signum - 1].loop = EV_A;
		2871	#endif
		2872
		2873	EV_FREQUENT_CHECK;
		2874
		2875	#if EV_USE_SIGNALFD
		2876	if (sigfd == -2)
2025	{	2877	{
2026	#ifndef _WIN32	2878	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2027	sigset_t full, prev;	2879	if (sigfd < 0 && errno == EINVAL)
2028	sigfillset (&full);	2880	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2029	sigprocmask (SIG_SETMASK, &full, &prev);
2030	#endif
2031		2881
2032	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2882	if (sigfd >= 0)
		2883	{
		2884	fd_intern (sigfd); /* doing it twice will not hurt */
2033		2885
2034	#ifndef _WIN32	2886	sigemptyset (&sigfd_set);
2035	sigprocmask (SIG_SETMASK, &prev, 0);	2887
2036	#endif	2888	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2889	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2890	ev_io_start (EV_A_ &sigfd_w);
		2891	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2892	}
2037	}	2893	}
		2894
		2895	if (sigfd >= 0)
		2896	{
		2897	/* TODO: check .head */
		2898	sigaddset (&sigfd_set, w->signum);
		2899	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2900
		2901	signalfd (sigfd, &sigfd_set, 0);
		2902	}
		2903	#endif
2038		2904
2039	ev_start (EV_A_ (W)w, 1);	2905	ev_start (EV_A_ (W)w, 1);
2040	wlist_add (&signals [w->signum - 1].head, (WL)w);	2906	wlist_add (&signals [w->signum - 1].head, (WL)w);
2041		2907
2042	if (!((WL)w)->next)	2908	if (!((WL)w)->next)
		2909	# if EV_USE_SIGNALFD
		2910	if (sigfd < 0) /*TODO*/
		2911	# endif
2043	{	2912	{
2044	#if _WIN32	2913	# ifdef _WIN32
		2914	evpipe_init (EV_A);
		2915
2045	signal (w->signum, ev_sighandler);	2916	signal (w->signum, ev_sighandler);
2046	#else	2917	# else
2047	struct sigaction sa;	2918	struct sigaction sa;
		2919
		2920	evpipe_init (EV_A);
		2921
2048	sa.sa_handler = ev_sighandler;	2922	sa.sa_handler = ev_sighandler;
2049	sigfillset (&sa.sa_mask);	2923	sigfillset (&sa.sa_mask);
2050	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2924	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2051	sigaction (w->signum, &sa, 0);	2925	sigaction (w->signum, &sa, 0);
		2926
		2927	if (origflags & EVFLAG_NOSIGMASK)
		2928	{
		2929	sigemptyset (&sa.sa_mask);
		2930	sigaddset (&sa.sa_mask, w->signum);
		2931	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
		2932	}
2052	#endif	2933	#endif
2053	}	2934	}
		2935
		2936	EV_FREQUENT_CHECK;
2054	}	2937	}
2055		2938
2056	void noinline	2939	void noinline
2057	ev_signal_stop (EV_P_ ev_signal *w)	2940	ev_signal_stop (EV_P_ ev_signal *w)
2058	{	2941	{
2059	clear_pending (EV_A_ (W)w);	2942	clear_pending (EV_A_ (W)w);
2060	if (expect_false (!ev_is_active (w)))	2943	if (expect_false (!ev_is_active (w)))
2061	return;	2944	return;
2062		2945
		2946	EV_FREQUENT_CHECK;
		2947
2063	wlist_del (&signals [w->signum - 1].head, (WL)w);	2948	wlist_del (&signals [w->signum - 1].head, (WL)w);
2064	ev_stop (EV_A_ (W)w);	2949	ev_stop (EV_A_ (W)w);
2065		2950
2066	if (!signals [w->signum - 1].head)	2951	if (!signals [w->signum - 1].head)
		2952	{
		2953	#if EV_MULTIPLICITY
		2954	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2955	#endif
		2956	#if EV_USE_SIGNALFD
		2957	if (sigfd >= 0)
		2958	{
		2959	sigset_t ss;
		2960
		2961	sigemptyset (&ss);
		2962	sigaddset (&ss, w->signum);
		2963	sigdelset (&sigfd_set, w->signum);
		2964
		2965	signalfd (sigfd, &sigfd_set, 0);
		2966	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2967	}
		2968	else
		2969	#endif
2067	signal (w->signum, SIG_DFL);	2970	signal (w->signum, SIG_DFL);
		2971	}
		2972
		2973	EV_FREQUENT_CHECK;
2068	}	2974	}
		2975
		2976	#endif
		2977
		2978	#if EV_CHILD_ENABLE
2069		2979
2070	void	2980	void
2071	ev_child_start (EV_P_ ev_child *w)	2981	ev_child_start (EV_P_ ev_child *w)
2072	{	2982	{
2073	#if EV_MULTIPLICITY	2983	#if EV_MULTIPLICITY
2074	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2984	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2075	#endif	2985	#endif
2076	if (expect_false (ev_is_active (w)))	2986	if (expect_false (ev_is_active (w)))
2077	return;	2987	return;
2078		2988
		2989	EV_FREQUENT_CHECK;
		2990
2079	ev_start (EV_A_ (W)w, 1);	2991	ev_start (EV_A_ (W)w, 1);
2080	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2992	wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
		2993
		2994	EV_FREQUENT_CHECK;
2081	}	2995	}
2082		2996
2083	void	2997	void
2084	ev_child_stop (EV_P_ ev_child *w)	2998	ev_child_stop (EV_P_ ev_child *w)
2085	{	2999	{
2086	clear_pending (EV_A_ (W)w);	3000	clear_pending (EV_A_ (W)w);
2087	if (expect_false (!ev_is_active (w)))	3001	if (expect_false (!ev_is_active (w)))
2088	return;	3002	return;
2089		3003
		3004	EV_FREQUENT_CHECK;
		3005
2090	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	3006	wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2091	ev_stop (EV_A_ (W)w);	3007	ev_stop (EV_A_ (W)w);
		3008
		3009	EV_FREQUENT_CHECK;
2092	}	3010	}
		3011
		3012	#endif
2093		3013
2094	#if EV_STAT_ENABLE	3014	#if EV_STAT_ENABLE
2095		3015
2096	# ifdef _WIN32	3016	# ifdef _WIN32
2097	# undef lstat	3017	# undef lstat
2098	# define lstat(a,b) _stati64 (a,b)	3018	# define lstat(a,b) _stati64 (a,b)
2099	# endif	3019	# endif
2100		3020
2101	#define DEF_STAT_INTERVAL 5.0074891	3021	#define DEF_STAT_INTERVAL 5.0074891
		3022	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2102	#define MIN_STAT_INTERVAL 0.1074891	3023	#define MIN_STAT_INTERVAL 0.1074891
2103		3024
2104	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	3025	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2105		3026
2106	#if EV_USE_INOTIFY	3027	#if EV_USE_INOTIFY
2107	# define EV_INOTIFY_BUFSIZE 8192	3028
		3029	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		3030	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2108		3031
2109	static void noinline	3032	static void noinline
2110	infy_add (EV_P_ ev_stat *w)	3033	infy_add (EV_P_ ev_stat *w)
2111	{	3034	{
2112	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);	3035	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);
2113		3036
2114	if (w->wd < 0)	3037	if (w->wd >= 0)
		3038	{
		3039	struct statfs sfs;
		3040
		3041	/* now local changes will be tracked by inotify, but remote changes won't */
		3042	/* unless the filesystem is known to be local, we therefore still poll */
		3043	/* also do poll on <2.6.25, but with normal frequency */
		3044
		3045	if (!fs_2625)
		3046	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3047	else if (!statfs (w->path, &sfs)
		3048	&& (sfs.f_type == 0x1373 /* devfs */
		3049	|| sfs.f_type == 0xEF53 /* ext2/3 */
		3050	|| sfs.f_type == 0x3153464a /* jfs */
		3051	|| sfs.f_type == 0x52654973 /* reiser3 */
		3052	|| sfs.f_type == 0x01021994 /* tempfs */
		3053	|| sfs.f_type == 0x58465342 /* xfs */))
		3054	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		3055	else
		3056	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2115	{	3057	}
2116	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	3058	else
		3059	{
		3060	/* can't use inotify, continue to stat */
		3061	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2117		3062
2118	/* monitor some parent directory for speedup hints */	3063	/* if path is not there, monitor some parent directory for speedup hints */
		3064	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		3065	/* but an efficiency issue only */
2119	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	3066	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2120	{	3067	{
2121	char path [4096];	3068	char path [4096];
2122	strcpy (path, w->path);	3069	strcpy (path, w->path);
2123		3070
…		…
2126	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	3073	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2127	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	3074	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2128		3075
2129	char *pend = strrchr (path, '/');	3076	char *pend = strrchr (path, '/');
2130		3077
2131	if (!pend)	3078	if (!pend || pend == path)
2132	break; /* whoops, no '/', complain to your admin */	3079	break;
2133		3080
2134	*pend = 0;	3081	*pend = 0;
2135	w->wd = inotify_add_watch (fs_fd, path, mask);	3082	w->wd = inotify_add_watch (fs_fd, path, mask);
2136	}	3083	}
2137	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	3084	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2138	}	3085	}
2139	}	3086	}
2140	else
2141	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2142		3087
2143	if (w->wd >= 0)	3088	if (w->wd >= 0)
2144	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	3089	wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
		3090
		3091	/* now re-arm timer, if required */
		3092	if (ev_is_active (&w->timer)) ev_ref (EV_A);
		3093	ev_timer_again (EV_A_ &w->timer);
		3094	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2145	}	3095	}
2146		3096
2147	static void noinline	3097	static void noinline
2148	infy_del (EV_P_ ev_stat *w)	3098	infy_del (EV_P_ ev_stat *w)
2149	{	3099	{
…		…
2152		3102
2153	if (wd < 0)	3103	if (wd < 0)
2154	return;	3104	return;
2155		3105
2156	w->wd = -2;	3106	w->wd = -2;
2157	slot = wd & (EV_INOTIFY_HASHSIZE - 1);	3107	slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2158	wlist_del (&fs_hash [slot].head, (WL)w);	3108	wlist_del (&fs_hash [slot].head, (WL)w);
2159		3109
2160	/* remove this watcher, if others are watching it, they will rearm */	3110	/* remove this watcher, if others are watching it, they will rearm */
2161	inotify_rm_watch (fs_fd, wd);	3111	inotify_rm_watch (fs_fd, wd);
2162	}	3112	}
2163		3113
2164	static void noinline	3114	static void noinline
2165	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	3115	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2166	{	3116	{
2167	if (slot < 0)	3117	if (slot < 0)
2168	/* overflow, need to check for all hahs slots */	3118	/* overflow, need to check for all hash slots */
2169	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3119	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2170	infy_wd (EV_A_ slot, wd, ev);	3120	infy_wd (EV_A_ slot, wd, ev);
2171	else	3121	else
2172	{	3122	{
2173	WL w_;	3123	WL w_;
2174		3124
2175	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )	3125	for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2176	{	3126	{
2177	ev_stat *w = (ev_stat *)w_;	3127	ev_stat *w = (ev_stat *)w_;
2178	w_ = w_->next; /* lets us remove this watcher and all before it */	3128	w_ = w_->next; /* lets us remove this watcher and all before it */
2179		3129
2180	if (w->wd == wd || wd == -1)	3130	if (w->wd == wd || wd == -1)
2181	{	3131	{
2182	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	3132	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2183	{	3133	{
		3134	wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2184	w->wd = -1;	3135	w->wd = -1;
2185	infy_add (EV_A_ w); /* re-add, no matter what */	3136	infy_add (EV_A_ w); /* re-add, no matter what */
2186	}	3137	}
2187		3138
2188	stat_timer_cb (EV_A_ &w->timer, 0);	3139	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2193		3144
2194	static void	3145	static void
2195	infy_cb (EV_P_ ev_io *w, int revents)	3146	infy_cb (EV_P_ ev_io *w, int revents)
2196	{	3147	{
2197	char buf [EV_INOTIFY_BUFSIZE];	3148	char buf [EV_INOTIFY_BUFSIZE];
2198	struct inotify_event *ev = (struct inotify_event *)buf;
2199	int ofs;	3149	int ofs;
2200	int len = read (fs_fd, buf, sizeof (buf));	3150	int len = read (fs_fd, buf, sizeof (buf));
2201		3151
2202	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3152	for (ofs = 0; ofs < len; )
		3153	{
		3154	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2203	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3155	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3156	ofs += sizeof (struct inotify_event) + ev->len;
		3157	}
2204	}	3158	}
2205		3159
2206	void inline_size	3160	inline_size void
		3161	ev_check_2625 (EV_P)
		3162	{
		3163	/* kernels < 2.6.25 are borked
		3164	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		3165	*/
		3166	if (ev_linux_version () < 0x020619)
		3167	return;
		3168
		3169	fs_2625 = 1;
		3170	}
		3171
		3172	inline_size int
		3173	infy_newfd (void)
		3174	{
		3175	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3176	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3177	if (fd >= 0)
		3178	return fd;
		3179	#endif
		3180	return inotify_init ();
		3181	}
		3182
		3183	inline_size void
2207	infy_init (EV_P)	3184	infy_init (EV_P)
2208	{	3185	{
2209	if (fs_fd != -2)	3186	if (fs_fd != -2)
2210	return;	3187	return;
2211		3188
		3189	fs_fd = -1;
		3190
		3191	ev_check_2625 (EV_A);
		3192
2212	fs_fd = inotify_init ();	3193	fs_fd = infy_newfd ();
2213		3194
2214	if (fs_fd >= 0)	3195	if (fs_fd >= 0)
2215	{	3196	{
		3197	fd_intern (fs_fd);
2216	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3198	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2217	ev_set_priority (&fs_w, EV_MAXPRI);	3199	ev_set_priority (&fs_w, EV_MAXPRI);
2218	ev_io_start (EV_A_ &fs_w);	3200	ev_io_start (EV_A_ &fs_w);
		3201	ev_unref (EV_A);
2219	}	3202	}
2220	}	3203	}
2221		3204
2222	void inline_size	3205	inline_size void
2223	infy_fork (EV_P)	3206	infy_fork (EV_P)
2224	{	3207	{
2225	int slot;	3208	int slot;
2226		3209
2227	if (fs_fd < 0)	3210	if (fs_fd < 0)
2228	return;	3211	return;
2229		3212
		3213	ev_ref (EV_A);
		3214	ev_io_stop (EV_A_ &fs_w);
2230	close (fs_fd);	3215	close (fs_fd);
2231	fs_fd = inotify_init ();	3216	fs_fd = infy_newfd ();
2232		3217
		3218	if (fs_fd >= 0)
		3219	{
		3220	fd_intern (fs_fd);
		3221	ev_io_set (&fs_w, fs_fd, EV_READ);
		3222	ev_io_start (EV_A_ &fs_w);
		3223	ev_unref (EV_A);
		3224	}
		3225
2233	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3226	for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2234	{	3227	{
2235	WL w_ = fs_hash [slot].head;	3228	WL w_ = fs_hash [slot].head;
2236	fs_hash [slot].head = 0;	3229	fs_hash [slot].head = 0;
2237		3230
2238	while (w_)	3231	while (w_)
…		…
2243	w->wd = -1;	3236	w->wd = -1;
2244		3237
2245	if (fs_fd >= 0)	3238	if (fs_fd >= 0)
2246	infy_add (EV_A_ w); /* re-add, no matter what */	3239	infy_add (EV_A_ w); /* re-add, no matter what */
2247	else	3240	else
		3241	{
		3242	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3243	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2248	ev_timer_start (EV_A_ &w->timer);	3244	ev_timer_again (EV_A_ &w->timer);
		3245	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3246	}
2249	}	3247	}
2250
2251	}	3248	}
2252	}	3249	}
2253		3250
		3251	#endif
		3252
		3253	#ifdef _WIN32
		3254	# define EV_LSTAT(p,b) _stati64 (p, b)
		3255	#else
		3256	# define EV_LSTAT(p,b) lstat (p, b)
2254	#endif	3257	#endif
2255		3258
2256	void	3259	void
2257	ev_stat_stat (EV_P_ ev_stat *w)	3260	ev_stat_stat (EV_P_ ev_stat *w)
2258	{	3261	{
…		…
2265	static void noinline	3268	static void noinline
2266	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3269	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2267	{	3270	{
2268	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3271	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2269		3272
2270	/* we copy this here each the time so that */	3273	ev_statdata prev = w->attr;
2271	/* prev has the old value when the callback gets invoked */
2272	w->prev = w->attr;
2273	ev_stat_stat (EV_A_ w);	3274	ev_stat_stat (EV_A_ w);
2274		3275
2275	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3276	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2276	if (	3277	if (
2277	w->prev.st_dev != w->attr.st_dev	3278	prev.st_dev != w->attr.st_dev
2278	|| w->prev.st_ino != w->attr.st_ino	3279	|| prev.st_ino != w->attr.st_ino
2279	|| w->prev.st_mode != w->attr.st_mode	3280	|| prev.st_mode != w->attr.st_mode
2280	|| w->prev.st_nlink != w->attr.st_nlink	3281	|| prev.st_nlink != w->attr.st_nlink
2281	|| w->prev.st_uid != w->attr.st_uid	3282	|| prev.st_uid != w->attr.st_uid
2282	|| w->prev.st_gid != w->attr.st_gid	3283	|| prev.st_gid != w->attr.st_gid
2283	|| w->prev.st_rdev != w->attr.st_rdev	3284	|| prev.st_rdev != w->attr.st_rdev
2284	|| w->prev.st_size != w->attr.st_size	3285	|| prev.st_size != w->attr.st_size
2285	|| w->prev.st_atime != w->attr.st_atime	3286	|| prev.st_atime != w->attr.st_atime
2286	|| w->prev.st_mtime != w->attr.st_mtime	3287	|| prev.st_mtime != w->attr.st_mtime
2287	|| w->prev.st_ctime != w->attr.st_ctime	3288	|| prev.st_ctime != w->attr.st_ctime
2288	) {	3289	) {
		3290	/* we only update w->prev on actual differences */
		3291	/* in case we test more often than invoke the callback, */
		3292	/* to ensure that prev is always different to attr */
		3293	w->prev = prev;
		3294
2289	#if EV_USE_INOTIFY	3295	#if EV_USE_INOTIFY
		3296	if (fs_fd >= 0)
		3297	{
2290	infy_del (EV_A_ w);	3298	infy_del (EV_A_ w);
2291	infy_add (EV_A_ w);	3299	infy_add (EV_A_ w);
2292	ev_stat_stat (EV_A_ w); /* avoid race... */	3300	ev_stat_stat (EV_A_ w); /* avoid race... */
		3301	}
2293	#endif	3302	#endif
2294		3303
2295	ev_feed_event (EV_A_ w, EV_STAT);	3304	ev_feed_event (EV_A_ w, EV_STAT);
2296	}	3305	}
2297	}	3306	}
…		…
2300	ev_stat_start (EV_P_ ev_stat *w)	3309	ev_stat_start (EV_P_ ev_stat *w)
2301	{	3310	{
2302	if (expect_false (ev_is_active (w)))	3311	if (expect_false (ev_is_active (w)))
2303	return;	3312	return;
2304		3313
2305	/* since we use memcmp, we need to clear any padding data etc. */
2306	memset (&w->prev, 0, sizeof (ev_statdata));
2307	memset (&w->attr, 0, sizeof (ev_statdata));
2308
2309	ev_stat_stat (EV_A_ w);	3314	ev_stat_stat (EV_A_ w);
2310		3315
		3316	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2311	if (w->interval < MIN_STAT_INTERVAL)	3317	w->interval = MIN_STAT_INTERVAL;
2312	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2313		3318
2314	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	3319	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2315	ev_set_priority (&w->timer, ev_priority (w));	3320	ev_set_priority (&w->timer, ev_priority (w));
2316		3321
2317	#if EV_USE_INOTIFY	3322	#if EV_USE_INOTIFY
2318	infy_init (EV_A);	3323	infy_init (EV_A);
2319		3324
2320	if (fs_fd >= 0)	3325	if (fs_fd >= 0)
2321	infy_add (EV_A_ w);	3326	infy_add (EV_A_ w);
2322	else	3327	else
2323	#endif	3328	#endif
		3329	{
2324	ev_timer_start (EV_A_ &w->timer);	3330	ev_timer_again (EV_A_ &w->timer);
		3331	ev_unref (EV_A);
		3332	}
2325		3333
2326	ev_start (EV_A_ (W)w, 1);	3334	ev_start (EV_A_ (W)w, 1);
		3335
		3336	EV_FREQUENT_CHECK;
2327	}	3337	}
2328		3338
2329	void	3339	void
2330	ev_stat_stop (EV_P_ ev_stat *w)	3340	ev_stat_stop (EV_P_ ev_stat *w)
2331	{	3341	{
2332	clear_pending (EV_A_ (W)w);	3342	clear_pending (EV_A_ (W)w);
2333	if (expect_false (!ev_is_active (w)))	3343	if (expect_false (!ev_is_active (w)))
2334	return;	3344	return;
2335		3345
		3346	EV_FREQUENT_CHECK;
		3347
2336	#if EV_USE_INOTIFY	3348	#if EV_USE_INOTIFY
2337	infy_del (EV_A_ w);	3349	infy_del (EV_A_ w);
2338	#endif	3350	#endif
		3351
		3352	if (ev_is_active (&w->timer))
		3353	{
		3354	ev_ref (EV_A);
2339	ev_timer_stop (EV_A_ &w->timer);	3355	ev_timer_stop (EV_A_ &w->timer);
		3356	}
2340		3357
2341	ev_stop (EV_A_ (W)w);	3358	ev_stop (EV_A_ (W)w);
		3359
		3360	EV_FREQUENT_CHECK;
2342	}	3361	}
2343	#endif	3362	#endif
2344		3363
2345	#if EV_IDLE_ENABLE	3364	#if EV_IDLE_ENABLE
2346	void	3365	void
…		…
2348	{	3367	{
2349	if (expect_false (ev_is_active (w)))	3368	if (expect_false (ev_is_active (w)))
2350	return;	3369	return;
2351		3370
2352	pri_adjust (EV_A_ (W)w);	3371	pri_adjust (EV_A_ (W)w);
		3372
		3373	EV_FREQUENT_CHECK;
2353		3374
2354	{	3375	{
2355	int active = ++idlecnt [ABSPRI (w)];	3376	int active = ++idlecnt [ABSPRI (w)];
2356		3377
2357	++idleall;	3378	++idleall;
2358	ev_start (EV_A_ (W)w, active);	3379	ev_start (EV_A_ (W)w, active);
2359		3380
2360	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);	3381	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2361	idles [ABSPRI (w)][active - 1] = w;	3382	idles [ABSPRI (w)][active - 1] = w;
2362	}	3383	}
		3384
		3385	EV_FREQUENT_CHECK;
2363	}	3386	}
2364		3387
2365	void	3388	void
2366	ev_idle_stop (EV_P_ ev_idle *w)	3389	ev_idle_stop (EV_P_ ev_idle *w)
2367	{	3390	{
2368	clear_pending (EV_A_ (W)w);	3391	clear_pending (EV_A_ (W)w);
2369	if (expect_false (!ev_is_active (w)))	3392	if (expect_false (!ev_is_active (w)))
2370	return;	3393	return;
2371		3394
		3395	EV_FREQUENT_CHECK;
		3396
2372	{	3397	{
2373	int active = ((W)w)->active;	3398	int active = ev_active (w);
2374		3399
2375	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	3400	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2376	((W)idles [ABSPRI (w)][active - 1])->active = active;	3401	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2377		3402
2378	ev_stop (EV_A_ (W)w);	3403	ev_stop (EV_A_ (W)w);
2379	--idleall;	3404	--idleall;
2380	}	3405	}
2381	}
2382	#endif
2383		3406
		3407	EV_FREQUENT_CHECK;
		3408	}
		3409	#endif
		3410
		3411	#if EV_PREPARE_ENABLE
2384	void	3412	void
2385	ev_prepare_start (EV_P_ ev_prepare *w)	3413	ev_prepare_start (EV_P_ ev_prepare *w)
2386	{	3414	{
2387	if (expect_false (ev_is_active (w)))	3415	if (expect_false (ev_is_active (w)))
2388	return;	3416	return;
		3417
		3418	EV_FREQUENT_CHECK;
2389		3419
2390	ev_start (EV_A_ (W)w, ++preparecnt);	3420	ev_start (EV_A_ (W)w, ++preparecnt);
2391	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);	3421	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2392	prepares [preparecnt - 1] = w;	3422	prepares [preparecnt - 1] = w;
		3423
		3424	EV_FREQUENT_CHECK;
2393	}	3425	}
2394		3426
2395	void	3427	void
2396	ev_prepare_stop (EV_P_ ev_prepare *w)	3428	ev_prepare_stop (EV_P_ ev_prepare *w)
2397	{	3429	{
2398	clear_pending (EV_A_ (W)w);	3430	clear_pending (EV_A_ (W)w);
2399	if (expect_false (!ev_is_active (w)))	3431	if (expect_false (!ev_is_active (w)))
2400	return;	3432	return;
2401		3433
		3434	EV_FREQUENT_CHECK;
		3435
2402	{	3436	{
2403	int active = ((W)w)->active;	3437	int active = ev_active (w);
		3438
2404	prepares [active - 1] = prepares [--preparecnt];	3439	prepares [active - 1] = prepares [--preparecnt];
2405	((W)prepares [active - 1])->active = active;	3440	ev_active (prepares [active - 1]) = active;
2406	}	3441	}
2407		3442
2408	ev_stop (EV_A_ (W)w);	3443	ev_stop (EV_A_ (W)w);
2409	}
2410		3444
		3445	EV_FREQUENT_CHECK;
		3446	}
		3447	#endif
		3448
		3449	#if EV_CHECK_ENABLE
2411	void	3450	void
2412	ev_check_start (EV_P_ ev_check *w)	3451	ev_check_start (EV_P_ ev_check *w)
2413	{	3452	{
2414	if (expect_false (ev_is_active (w)))	3453	if (expect_false (ev_is_active (w)))
2415	return;	3454	return;
		3455
		3456	EV_FREQUENT_CHECK;
2416		3457
2417	ev_start (EV_A_ (W)w, ++checkcnt);	3458	ev_start (EV_A_ (W)w, ++checkcnt);
2418	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);	3459	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2419	checks [checkcnt - 1] = w;	3460	checks [checkcnt - 1] = w;
		3461
		3462	EV_FREQUENT_CHECK;
2420	}	3463	}
2421		3464
2422	void	3465	void
2423	ev_check_stop (EV_P_ ev_check *w)	3466	ev_check_stop (EV_P_ ev_check *w)
2424	{	3467	{
2425	clear_pending (EV_A_ (W)w);	3468	clear_pending (EV_A_ (W)w);
2426	if (expect_false (!ev_is_active (w)))	3469	if (expect_false (!ev_is_active (w)))
2427	return;	3470	return;
2428		3471
		3472	EV_FREQUENT_CHECK;
		3473
2429	{	3474	{
2430	int active = ((W)w)->active;	3475	int active = ev_active (w);
		3476
2431	checks [active - 1] = checks [--checkcnt];	3477	checks [active - 1] = checks [--checkcnt];
2432	((W)checks [active - 1])->active = active;	3478	ev_active (checks [active - 1]) = active;
2433	}	3479	}
2434		3480
2435	ev_stop (EV_A_ (W)w);	3481	ev_stop (EV_A_ (W)w);
		3482
		3483	EV_FREQUENT_CHECK;
2436	}	3484	}
		3485	#endif
2437		3486
2438	#if EV_EMBED_ENABLE	3487	#if EV_EMBED_ENABLE
2439	void noinline	3488	void noinline
2440	ev_embed_sweep (EV_P_ ev_embed *w)	3489	ev_embed_sweep (EV_P_ ev_embed *w)
2441	{	3490	{
2442	ev_loop (w->other, EVLOOP_NONBLOCK);	3491	ev_run (w->other, EVRUN_NOWAIT);
2443	}	3492	}
2444		3493
2445	static void	3494	static void
2446	embed_io_cb (EV_P_ ev_io *io, int revents)	3495	embed_io_cb (EV_P_ ev_io *io, int revents)
2447	{	3496	{
2448	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	3497	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2449		3498
2450	if (ev_cb (w))	3499	if (ev_cb (w))
2451	ev_feed_event (EV_A_ (W)w, EV_EMBED);	3500	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2452	else	3501	else
2453	ev_loop (w->other, EVLOOP_NONBLOCK);	3502	ev_run (w->other, EVRUN_NOWAIT);
2454	}	3503	}
2455		3504
2456	static void	3505	static void
2457	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3506	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2458	{	3507	{
2459	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3508	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2460		3509
2461	{	3510	{
2462	struct ev_loop *loop = w->other;	3511	EV_P = w->other;
2463		3512
2464	while (fdchangecnt)	3513	while (fdchangecnt)
2465	{	3514	{
2466	fd_reify (EV_A);	3515	fd_reify (EV_A);
2467	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3516	ev_run (EV_A_ EVRUN_NOWAIT);
2468	}	3517	}
2469	}	3518	}
		3519	}
		3520
		3521	static void
		3522	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3523	{
		3524	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3525
		3526	ev_embed_stop (EV_A_ w);
		3527
		3528	{
		3529	EV_P = w->other;
		3530
		3531	ev_loop_fork (EV_A);
		3532	ev_run (EV_A_ EVRUN_NOWAIT);
		3533	}
		3534
		3535	ev_embed_start (EV_A_ w);
2470	}	3536	}
2471		3537
2472	#if 0	3538	#if 0
2473	static void	3539	static void
2474	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3540	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2482	{	3548	{
2483	if (expect_false (ev_is_active (w)))	3549	if (expect_false (ev_is_active (w)))
2484	return;	3550	return;
2485		3551
2486	{	3552	{
2487	struct ev_loop *loop = w->other;	3553	EV_P = w->other;
2488	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3554	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2489	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3555	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2490	}	3556	}
		3557
		3558	EV_FREQUENT_CHECK;
2491		3559
2492	ev_set_priority (&w->io, ev_priority (w));	3560	ev_set_priority (&w->io, ev_priority (w));
2493	ev_io_start (EV_A_ &w->io);	3561	ev_io_start (EV_A_ &w->io);
2494		3562
2495	ev_prepare_init (&w->prepare, embed_prepare_cb);	3563	ev_prepare_init (&w->prepare, embed_prepare_cb);
2496	ev_set_priority (&w->prepare, EV_MINPRI);	3564	ev_set_priority (&w->prepare, EV_MINPRI);
2497	ev_prepare_start (EV_A_ &w->prepare);	3565	ev_prepare_start (EV_A_ &w->prepare);
2498		3566
		3567	ev_fork_init (&w->fork, embed_fork_cb);
		3568	ev_fork_start (EV_A_ &w->fork);
		3569
2499	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	3570	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2500		3571
2501	ev_start (EV_A_ (W)w, 1);	3572	ev_start (EV_A_ (W)w, 1);
		3573
		3574	EV_FREQUENT_CHECK;
2502	}	3575	}
2503		3576
2504	void	3577	void
2505	ev_embed_stop (EV_P_ ev_embed *w)	3578	ev_embed_stop (EV_P_ ev_embed *w)
2506	{	3579	{
2507	clear_pending (EV_A_ (W)w);	3580	clear_pending (EV_A_ (W)w);
2508	if (expect_false (!ev_is_active (w)))	3581	if (expect_false (!ev_is_active (w)))
2509	return;	3582	return;
2510		3583
		3584	EV_FREQUENT_CHECK;
		3585
2511	ev_io_stop (EV_A_ &w->io);	3586	ev_io_stop (EV_A_ &w->io);
2512	ev_prepare_stop (EV_A_ &w->prepare);	3587	ev_prepare_stop (EV_A_ &w->prepare);
		3588	ev_fork_stop (EV_A_ &w->fork);
2513		3589
2514	ev_stop (EV_A_ (W)w);	3590	ev_stop (EV_A_ (W)w);
		3591
		3592	EV_FREQUENT_CHECK;
2515	}	3593	}
2516	#endif	3594	#endif
2517		3595
2518	#if EV_FORK_ENABLE	3596	#if EV_FORK_ENABLE
2519	void	3597	void
2520	ev_fork_start (EV_P_ ev_fork *w)	3598	ev_fork_start (EV_P_ ev_fork *w)
2521	{	3599	{
2522	if (expect_false (ev_is_active (w)))	3600	if (expect_false (ev_is_active (w)))
2523	return;	3601	return;
		3602
		3603	EV_FREQUENT_CHECK;
2524		3604
2525	ev_start (EV_A_ (W)w, ++forkcnt);	3605	ev_start (EV_A_ (W)w, ++forkcnt);
2526	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);	3606	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2527	forks [forkcnt - 1] = w;	3607	forks [forkcnt - 1] = w;
		3608
		3609	EV_FREQUENT_CHECK;
2528	}	3610	}
2529		3611
2530	void	3612	void
2531	ev_fork_stop (EV_P_ ev_fork *w)	3613	ev_fork_stop (EV_P_ ev_fork *w)
2532	{	3614	{
2533	clear_pending (EV_A_ (W)w);	3615	clear_pending (EV_A_ (W)w);
2534	if (expect_false (!ev_is_active (w)))	3616	if (expect_false (!ev_is_active (w)))
2535	return;	3617	return;
2536		3618
		3619	EV_FREQUENT_CHECK;
		3620
2537	{	3621	{
2538	int active = ((W)w)->active;	3622	int active = ev_active (w);
		3623
2539	forks [active - 1] = forks [--forkcnt];	3624	forks [active - 1] = forks [--forkcnt];
2540	((W)forks [active - 1])->active = active;	3625	ev_active (forks [active - 1]) = active;
2541	}	3626	}
2542		3627
2543	ev_stop (EV_A_ (W)w);	3628	ev_stop (EV_A_ (W)w);
2544	}
2545	#endif
2546		3629
		3630	EV_FREQUENT_CHECK;
		3631	}
		3632	#endif
		3633
2547	#if EV_ASYNC_ENABLE	3634	#if EV_CLEANUP_ENABLE
2548	void	3635	void
2549	ev_async_start (EV_P_ ev_async *w)	3636	ev_cleanup_start (EV_P_ ev_cleanup *w)
2550	{	3637	{
2551	if (expect_false (ev_is_active (w)))	3638	if (expect_false (ev_is_active (w)))
2552	return;	3639	return;
2553		3640
		3641	EV_FREQUENT_CHECK;
		3642
		3643	ev_start (EV_A_ (W)w, ++cleanupcnt);
		3644	array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
		3645	cleanups [cleanupcnt - 1] = w;
		3646
		3647	/* cleanup watchers should never keep a refcount on the loop */
		3648	ev_unref (EV_A);
		3649	EV_FREQUENT_CHECK;
		3650	}
		3651
		3652	void
		3653	ev_cleanup_stop (EV_P_ ev_cleanup *w)
		3654	{
		3655	clear_pending (EV_A_ (W)w);
		3656	if (expect_false (!ev_is_active (w)))
		3657	return;
		3658
		3659	EV_FREQUENT_CHECK;
		3660	ev_ref (EV_A);
		3661
		3662	{
		3663	int active = ev_active (w);
		3664
		3665	cleanups [active - 1] = cleanups [--cleanupcnt];
		3666	ev_active (cleanups [active - 1]) = active;
		3667	}
		3668
		3669	ev_stop (EV_A_ (W)w);
		3670
		3671	EV_FREQUENT_CHECK;
		3672	}
		3673	#endif
		3674
		3675	#if EV_ASYNC_ENABLE
		3676	void
		3677	ev_async_start (EV_P_ ev_async *w)
		3678	{
		3679	if (expect_false (ev_is_active (w)))
		3680	return;
		3681
		3682	w->sent = 0;
		3683
2554	evpipe_init (EV_A);	3684	evpipe_init (EV_A);
		3685
		3686	EV_FREQUENT_CHECK;
2555		3687
2556	ev_start (EV_A_ (W)w, ++asynccnt);	3688	ev_start (EV_A_ (W)w, ++asynccnt);
2557	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);	3689	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2558	asyncs [asynccnt - 1] = w;	3690	asyncs [asynccnt - 1] = w;
		3691
		3692	EV_FREQUENT_CHECK;
2559	}	3693	}
2560		3694
2561	void	3695	void
2562	ev_async_stop (EV_P_ ev_async *w)	3696	ev_async_stop (EV_P_ ev_async *w)
2563	{	3697	{
2564	clear_pending (EV_A_ (W)w);	3698	clear_pending (EV_A_ (W)w);
2565	if (expect_false (!ev_is_active (w)))	3699	if (expect_false (!ev_is_active (w)))
2566	return;	3700	return;
2567		3701
		3702	EV_FREQUENT_CHECK;
		3703
2568	{	3704	{
2569	int active = ((W)w)->active;	3705	int active = ev_active (w);
		3706
2570	asyncs [active - 1] = asyncs [--asynccnt];	3707	asyncs [active - 1] = asyncs [--asynccnt];
2571	((W)asyncs [active - 1])->active = active;	3708	ev_active (asyncs [active - 1]) = active;
2572	}	3709	}
2573		3710
2574	ev_stop (EV_A_ (W)w);	3711	ev_stop (EV_A_ (W)w);
		3712
		3713	EV_FREQUENT_CHECK;
2575	}	3714	}
2576		3715
2577	void	3716	void
2578	ev_async_send (EV_P_ ev_async *w)	3717	ev_async_send (EV_P_ ev_async *w)
2579	{	3718	{
2580	w->sent = 1;	3719	w->sent = 1;
2581	evpipe_write (EV_A_ &gotasync);	3720	evpipe_write (EV_A_ &async_pending);
2582	}	3721	}
2583	#endif	3722	#endif
2584		3723
2585	/*****************************************************************************/	3724	/*****************************************************************************/
2586		3725
…		…
2596	once_cb (EV_P_ struct ev_once *once, int revents)	3735	once_cb (EV_P_ struct ev_once *once, int revents)
2597	{	3736	{
2598	void (*cb)(int revents, void *arg) = once->cb;	3737	void (*cb)(int revents, void *arg) = once->cb;
2599	void *arg = once->arg;	3738	void *arg = once->arg;
2600		3739
2601	ev_io_stop (EV_A_ &once->io);	3740	ev_io_stop (EV_A_ &once->io);
2602	ev_timer_stop (EV_A_ &once->to);	3741	ev_timer_stop (EV_A_ &once->to);
2603	ev_free (once);	3742	ev_free (once);
2604		3743
2605	cb (revents, arg);	3744	cb (revents, arg);
2606	}	3745	}
2607		3746
2608	static void	3747	static void
2609	once_cb_io (EV_P_ ev_io *w, int revents)	3748	once_cb_io (EV_P_ ev_io *w, int revents)
2610	{	3749	{
2611	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3750	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3751
		3752	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2612	}	3753	}
2613		3754
2614	static void	3755	static void
2615	once_cb_to (EV_P_ ev_timer *w, int revents)	3756	once_cb_to (EV_P_ ev_timer *w, int revents)
2616	{	3757	{
2617	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3758	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3759
		3760	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2618	}	3761	}
2619		3762
2620	void	3763	void
2621	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3764	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2622	{	3765	{
2623	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	3766	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2624		3767
2625	if (expect_false (!once))	3768	if (expect_false (!once))
2626	{	3769	{
2627	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3770	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2628	return;	3771	return;
2629	}	3772	}
2630		3773
2631	once->cb = cb;	3774	once->cb = cb;
2632	once->arg = arg;	3775	once->arg = arg;
…		…
2644	ev_timer_set (&once->to, timeout, 0.);	3787	ev_timer_set (&once->to, timeout, 0.);
2645	ev_timer_start (EV_A_ &once->to);	3788	ev_timer_start (EV_A_ &once->to);
2646	}	3789	}
2647	}	3790	}
2648		3791
		3792	/*****************************************************************************/
		3793
		3794	#if EV_WALK_ENABLE
		3795	void
		3796	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3797	{
		3798	int i, j;
		3799	ev_watcher_list *wl, *wn;
		3800
		3801	if (types & (EV_IO | EV_EMBED))
		3802	for (i = 0; i < anfdmax; ++i)
		3803	for (wl = anfds [i].head; wl; )
		3804	{
		3805	wn = wl->next;
		3806
		3807	#if EV_EMBED_ENABLE
		3808	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3809	{
		3810	if (types & EV_EMBED)
		3811	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3812	}
		3813	else
		3814	#endif
		3815	#if EV_USE_INOTIFY
		3816	if (ev_cb ((ev_io *)wl) == infy_cb)
		3817	;
		3818	else
		3819	#endif
		3820	if ((ev_io *)wl != &pipe_w)
		3821	if (types & EV_IO)
		3822	cb (EV_A_ EV_IO, wl);
		3823
		3824	wl = wn;
		3825	}
		3826
		3827	if (types & (EV_TIMER | EV_STAT))
		3828	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3829	#if EV_STAT_ENABLE
		3830	/*TODO: timer is not always active*/
		3831	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3832	{
		3833	if (types & EV_STAT)
		3834	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3835	}
		3836	else
		3837	#endif
		3838	if (types & EV_TIMER)
		3839	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3840
		3841	#if EV_PERIODIC_ENABLE
		3842	if (types & EV_PERIODIC)
		3843	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3844	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3845	#endif
		3846
		3847	#if EV_IDLE_ENABLE
		3848	if (types & EV_IDLE)
		3849	for (j = NUMPRI; i--; )
		3850	for (i = idlecnt [j]; i--; )
		3851	cb (EV_A_ EV_IDLE, idles [j][i]);
		3852	#endif
		3853
		3854	#if EV_FORK_ENABLE
		3855	if (types & EV_FORK)
		3856	for (i = forkcnt; i--; )
		3857	if (ev_cb (forks [i]) != embed_fork_cb)
		3858	cb (EV_A_ EV_FORK, forks [i]);
		3859	#endif
		3860
		3861	#if EV_ASYNC_ENABLE
		3862	if (types & EV_ASYNC)
		3863	for (i = asynccnt; i--; )
		3864	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3865	#endif
		3866
		3867	#if EV_PREPARE_ENABLE
		3868	if (types & EV_PREPARE)
		3869	for (i = preparecnt; i--; )
		3870	# if EV_EMBED_ENABLE
		3871	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3872	# endif
		3873	cb (EV_A_ EV_PREPARE, prepares [i]);
		3874	#endif
		3875
		3876	#if EV_CHECK_ENABLE
		3877	if (types & EV_CHECK)
		3878	for (i = checkcnt; i--; )
		3879	cb (EV_A_ EV_CHECK, checks [i]);
		3880	#endif
		3881
		3882	#if EV_SIGNAL_ENABLE
		3883	if (types & EV_SIGNAL)
		3884	for (i = 0; i < EV_NSIG - 1; ++i)
		3885	for (wl = signals [i].head; wl; )
		3886	{
		3887	wn = wl->next;
		3888	cb (EV_A_ EV_SIGNAL, wl);
		3889	wl = wn;
		3890	}
		3891	#endif
		3892
		3893	#if EV_CHILD_ENABLE
		3894	if (types & EV_CHILD)
		3895	for (i = (EV_PID_HASHSIZE); i--; )
		3896	for (wl = childs [i]; wl; )
		3897	{
		3898	wn = wl->next;
		3899	cb (EV_A_ EV_CHILD, wl);
		3900	wl = wn;
		3901	}
		3902	#endif
		3903	/* EV_STAT 0x00001000 /* stat data changed */
		3904	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3905	}
		3906	#endif
		3907
2649	#if EV_MULTIPLICITY	3908	#if EV_MULTIPLICITY
2650	#include "ev_wrap.h"	3909	#include "ev_wrap.h"
2651	#endif	3910	#endif
2652		3911
2653	#ifdef __cplusplus	3912	EV_CPP(})
2654	}
2655	#endif
2656		3913

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