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Comparing libev/ev.c (file contents):
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC vs.
Revision 1.287 by root, Mon Apr 20 19:45:58 2009 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
31	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# include "config.h"	49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_SYSCALL
		53	# ifndef EV_USE_CLOCK_SYSCALL
		54	# define EV_USE_CLOCK_SYSCALL 1
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 0
		57	# endif
		58	# ifndef EV_USE_MONOTONIC
		59	# define EV_USE_MONOTONIC 1
		60	# endif
		61	# endif
		62	# endif
33		63
34	# if HAVE_CLOCK_GETTIME	64	# if HAVE_CLOCK_GETTIME
		65	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	66	# define EV_USE_MONOTONIC 1
		67	# endif
		68	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	69	# define EV_USE_REALTIME 0
		70	# endif
		71	# else
		72	# ifndef EV_USE_MONOTONIC
		73	# define EV_USE_MONOTONIC 0
		74	# endif
		75	# ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 0
		77	# endif
37	# endif	78	# endif
38		79
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	80	# ifndef EV_USE_NANOSLEEP
		81	# if HAVE_NANOSLEEP
40	# define EV_USE_SELECT 1	82	# define EV_USE_NANOSLEEP 1
		83	# else
		84	# define EV_USE_NANOSLEEP 0
		85	# endif
41	# endif	86	# endif
42		87
43	# if HAVE_POLL && HAVE_POLL_H	88	# ifndef EV_USE_SELECT
		89	# if HAVE_SELECT && HAVE_SYS_SELECT_H
44	# define EV_USE_POLL 1	90	# define EV_USE_SELECT 1
		91	# else
		92	# define EV_USE_SELECT 0
		93	# endif
45	# endif	94	# endif
46		95
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	96	# ifndef EV_USE_POLL
		97	# if HAVE_POLL && HAVE_POLL_H
48	# define EV_USE_EPOLL 1	98	# define EV_USE_POLL 1
		99	# else
		100	# define EV_USE_POLL 0
		101	# endif
49	# endif	102	# endif
50		103
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	104	# ifndef EV_USE_EPOLL
		105	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52	# define EV_USE_KQUEUE 1	106	# define EV_USE_EPOLL 1
		107	# else
		108	# define EV_USE_EPOLL 0
		109	# endif
53	# endif	110	# endif
		111
		112	# ifndef EV_USE_KQUEUE
		113	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		114	# define EV_USE_KQUEUE 1
		115	# else
		116	# define EV_USE_KQUEUE 0
		117	# endif
		118	# endif
		119
		120	# ifndef EV_USE_PORT
		121	# if HAVE_PORT_H && HAVE_PORT_CREATE
		122	# define EV_USE_PORT 1
		123	# else
		124	# define EV_USE_PORT 0
		125	# endif
		126	# endif
54		127
		128	# ifndef EV_USE_INOTIFY
		129	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		130	# define EV_USE_INOTIFY 1
		131	# else
		132	# define EV_USE_INOTIFY 0
		133	# endif
		134	# endif
		135
		136	# ifndef EV_USE_EVENTFD
		137	# if HAVE_EVENTFD
		138	# define EV_USE_EVENTFD 1
		139	# else
		140	# define EV_USE_EVENTFD 0
		141	# endif
		142	# endif
		143
55	#endif	144	#endif
56		145
57	#include <math.h>	146	#include <math.h>
58	#include <stdlib.h>	147	#include <stdlib.h>
59	#include <unistd.h>
60	#include <fcntl.h>	148	#include <fcntl.h>
61	#include <signal.h>
62	#include <stddef.h>	149	#include <stddef.h>
63		150
64	#include <stdio.h>	151	#include <stdio.h>
65		152
66	#include <assert.h>	153	#include <assert.h>
67	#include <errno.h>	154	#include <errno.h>
68	#include <sys/types.h>	155	#include <sys/types.h>
		156	#include <time.h>
		157
		158	#include <signal.h>
		159
		160	#ifdef EV_H
		161	# include EV_H
		162	#else
		163	# include "ev.h"
		164	#endif
		165
69	#ifndef WIN32	166	#ifndef _WIN32
		167	# include <sys/time.h>
70	# include <sys/wait.h>	168	# include <sys/wait.h>
		169	# include <unistd.h>
		170	#else
		171	# include <io.h>
		172	# define WIN32_LEAN_AND_MEAN
		173	# include <windows.h>
		174	# ifndef EV_SELECT_IS_WINSOCKET
		175	# define EV_SELECT_IS_WINSOCKET 1
71	#endif	176	# endif
72	#include <sys/time.h>	177	#endif
73	#include <time.h>
74		178
75	/**/	179	/* this block tries to deduce configuration from header-defined symbols and defaults */
		180
		181	#ifndef EV_USE_CLOCK_SYSCALL
		182	# if __linux && __GLIBC__ >= 2
		183	# define EV_USE_CLOCK_SYSCALL 1
		184	# else
		185	# define EV_USE_CLOCK_SYSCALL 0
		186	# endif
		187	#endif
76		188
77	#ifndef EV_USE_MONOTONIC	189	#ifndef EV_USE_MONOTONIC
		190	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
78	# define EV_USE_MONOTONIC 1	191	# define EV_USE_MONOTONIC 1
		192	# else
		193	# define EV_USE_MONOTONIC 0
		194	# endif
		195	#endif
		196
		197	#ifndef EV_USE_REALTIME
		198	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
		199	#endif
		200
		201	#ifndef EV_USE_NANOSLEEP
		202	# if _POSIX_C_SOURCE >= 199309L
		203	# define EV_USE_NANOSLEEP 1
		204	# else
		205	# define EV_USE_NANOSLEEP 0
		206	# endif
79	#endif	207	#endif
80		208
81	#ifndef EV_USE_SELECT	209	#ifndef EV_USE_SELECT
82	# define EV_USE_SELECT 1	210	# define EV_USE_SELECT 1
83	#endif	211	#endif
84		212
85	#ifndef EV_USE_POLL	213	#ifndef EV_USE_POLL
86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	214	# ifdef _WIN32
		215	# define EV_USE_POLL 0
		216	# else
		217	# define EV_USE_POLL 1
		218	# endif
87	#endif	219	#endif
88		220
89	#ifndef EV_USE_EPOLL	221	#ifndef EV_USE_EPOLL
		222	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		223	# define EV_USE_EPOLL 1
		224	# else
90	# define EV_USE_EPOLL 0	225	# define EV_USE_EPOLL 0
		226	# endif
91	#endif	227	#endif
92		228
93	#ifndef EV_USE_KQUEUE	229	#ifndef EV_USE_KQUEUE
94	# define EV_USE_KQUEUE 0	230	# define EV_USE_KQUEUE 0
95	#endif	231	#endif
96		232
		233	#ifndef EV_USE_PORT
		234	# define EV_USE_PORT 0
		235	#endif
		236
97	#ifndef EV_USE_WIN32	237	#ifndef EV_USE_INOTIFY
98	# ifdef WIN32	238	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
99	# define EV_USE_WIN32 1	239	# define EV_USE_INOTIFY 1
100	# else	240	# else
101	# define EV_USE_WIN32 0	241	# define EV_USE_INOTIFY 0
102	# endif	242	# endif
103	#endif	243	#endif
104		244
105	#ifndef EV_USE_REALTIME	245	#ifndef EV_PID_HASHSIZE
106	# define EV_USE_REALTIME 1	246	# if EV_MINIMAL
		247	# define EV_PID_HASHSIZE 1
		248	# else
		249	# define EV_PID_HASHSIZE 16
107	#endif	250	# endif
		251	#endif
108		252
109	/**/	253	#ifndef EV_INOTIFY_HASHSIZE
		254	# if EV_MINIMAL
		255	# define EV_INOTIFY_HASHSIZE 1
		256	# else
		257	# define EV_INOTIFY_HASHSIZE 16
		258	# endif
		259	#endif
		260
		261	#ifndef EV_USE_EVENTFD
		262	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		263	# define EV_USE_EVENTFD 1
		264	# else
		265	# define EV_USE_EVENTFD 0
		266	# endif
		267	#endif
		268
		269	#if 0 /* debugging */
		270	# define EV_VERIFY 3
		271	# define EV_USE_4HEAP 1
		272	# define EV_HEAP_CACHE_AT 1
		273	#endif
		274
		275	#ifndef EV_VERIFY
		276	# define EV_VERIFY !EV_MINIMAL
		277	#endif
		278
		279	#ifndef EV_USE_4HEAP
		280	# define EV_USE_4HEAP !EV_MINIMAL
		281	#endif
		282
		283	#ifndef EV_HEAP_CACHE_AT
		284	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		285	#endif
		286
		287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
110		288
111	#ifndef CLOCK_MONOTONIC	289	#ifndef CLOCK_MONOTONIC
112	# undef EV_USE_MONOTONIC	290	# undef EV_USE_MONOTONIC
113	# define EV_USE_MONOTONIC 0	291	# define EV_USE_MONOTONIC 0
114	#endif	292	#endif
…		…
116	#ifndef CLOCK_REALTIME	294	#ifndef CLOCK_REALTIME
117	# undef EV_USE_REALTIME	295	# undef EV_USE_REALTIME
118	# define EV_USE_REALTIME 0	296	# define EV_USE_REALTIME 0
119	#endif	297	#endif
120		298
		299	#if !EV_STAT_ENABLE
		300	# undef EV_USE_INOTIFY
		301	# define EV_USE_INOTIFY 0
		302	#endif
		303
		304	#if !EV_USE_NANOSLEEP
		305	# ifndef _WIN32
		306	# include <sys/select.h>
		307	# endif
		308	#endif
		309
		310	#if EV_USE_INOTIFY
		311	# include <sys/utsname.h>
		312	# include <sys/statfs.h>
		313	# include <sys/inotify.h>
		314	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		315	# ifndef IN_DONT_FOLLOW
		316	# undef EV_USE_INOTIFY
		317	# define EV_USE_INOTIFY 0
		318	# endif
		319	#endif
		320
		321	#if EV_SELECT_IS_WINSOCKET
		322	# include <winsock.h>
		323	#endif
		324
		325	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		326	/* which makes programs even slower. might work on other unices, too. */
		327	#if EV_USE_CLOCK_SYSCALL
		328	# include <syscall.h>
		329	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		330	# undef EV_USE_MONOTONIC
		331	# define EV_USE_MONOTONIC 1
		332	#endif
		333
		334	#if EV_USE_EVENTFD
		335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		336	# include <stdint.h>
		337	# ifdef __cplusplus
		338	extern "C" {
		339	# endif
		340	int eventfd (unsigned int initval, int flags);
		341	# ifdef __cplusplus
		342	}
		343	# endif
		344	#endif
		345
121	/**/	346	/**/
122		347
		348	#if EV_VERIFY >= 3
		349	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		350	#else
		351	# define EV_FREQUENT_CHECK do { } while (0)
		352	#endif
		353
		354	/*
		355	* This is used to avoid floating point rounding problems.
		356	* It is added to ev_rt_now when scheduling periodics
		357	* to ensure progress, time-wise, even when rounding
		358	* errors are against us.
		359	* This value is good at least till the year 4000.
		360	* Better solutions welcome.
		361	*/
		362	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		363
123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	364	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	365	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	366	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
127		367
128	#include "ev.h"
129
130	#if __GNUC__ >= 3	368	#if __GNUC__ >= 4
131	# define expect(expr,value) __builtin_expect ((expr),(value))	369	# define expect(expr,value) __builtin_expect ((expr),(value))
132	# define inline inline	370	# define noinline __attribute__ ((noinline))
133	#else	371	#else
134	# define expect(expr,value) (expr)	372	# define expect(expr,value) (expr)
135	# define inline static	373	# define noinline
		374	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		375	# define inline
		376	# endif
136	#endif	377	#endif
137		378
138	#define expect_false(expr) expect ((expr) != 0, 0)	379	#define expect_false(expr) expect ((expr) != 0, 0)
139	#define expect_true(expr) expect ((expr) != 0, 1)	380	#define expect_true(expr) expect ((expr) != 0, 1)
		381	#define inline_size static inline
		382
		383	#if EV_MINIMAL
		384	# define inline_speed static noinline
		385	#else
		386	# define inline_speed static inline
		387	#endif
140		388
141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	389	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	390	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
143		391
		392	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		393	#define EMPTY2(a,b) /* used to suppress some warnings */
		394
144	typedef struct ev_watcher *W;	395	typedef ev_watcher *W;
145	typedef struct ev_watcher_list *WL;	396	typedef ev_watcher_list *WL;
146	typedef struct ev_watcher_time *WT;	397	typedef ev_watcher_time *WT;
147		398
		399	#define ev_active(w) ((W)(w))->active
		400	#define ev_at(w) ((WT)(w))->at
		401
		402	#if EV_USE_REALTIME
		403	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		404	/* giving it a reasonably high chance of working on typical architetcures */
		405	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		406	#endif
		407
		408	#if EV_USE_MONOTONIC
148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	409	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
149
150	#if WIN32
151	/* note: the comment below could not be substantiated, but what would I care */
152	/* MSDN says this is required to handle SIGFPE */
153	volatile double SIGFPE_REQ = 0.0f;
154	#endif	410	#endif
		411
		412	#ifdef _WIN32
		413	# include "ev_win32.c"
		414	#endif
		415
		416	/*****************************************************************************/
		417
		418	static void (*syserr_cb)(const char *msg);
		419
		420	void
		421	ev_set_syserr_cb (void (*cb)(const char *msg))
		422	{
		423	syserr_cb = cb;
		424	}
		425
		426	static void noinline
		427	ev_syserr (const char *msg)
		428	{
		429	if (!msg)
		430	msg = "(libev) system error";
		431
		432	if (syserr_cb)
		433	syserr_cb (msg);
		434	else
		435	{
		436	perror (msg);
		437	abort ();
		438	}
		439	}
		440
		441	static void *
		442	ev_realloc_emul (void *ptr, long size)
		443	{
		444	/* some systems, notably openbsd and darwin, fail to properly
		445	* implement realloc (x, 0) (as required by both ansi c-98 and
		446	* the single unix specification, so work around them here.
		447	*/
		448
		449	if (size)
		450	return realloc (ptr, size);
		451
		452	free (ptr);
		453	return 0;
		454	}
		455
		456	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		457
		458	void
		459	ev_set_allocator (void *(*cb)(void *ptr, long size))
		460	{
		461	alloc = cb;
		462	}
		463
		464	inline_speed void *
		465	ev_realloc (void *ptr, long size)
		466	{
		467	ptr = alloc (ptr, size);
		468
		469	if (!ptr && size)
		470	{
		471	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		472	abort ();
		473	}
		474
		475	return ptr;
		476	}
		477
		478	#define ev_malloc(size) ev_realloc (0, (size))
		479	#define ev_free(ptr) ev_realloc ((ptr), 0)
155		480
156	/*****************************************************************************/	481	/*****************************************************************************/
157		482
158	typedef struct	483	typedef struct
159	{	484	{
160	WL head;	485	WL head;
161	unsigned char events;	486	unsigned char events;
162	unsigned char reify;	487	unsigned char reify;
		488	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
		489	unsigned char unused;
		490	#if EV_USE_EPOLL
		491	unsigned int egen; /* generation counter to counter epoll bugs */
		492	#endif
		493	#if EV_SELECT_IS_WINSOCKET
		494	SOCKET handle;
		495	#endif
163	} ANFD;	496	} ANFD;
164		497
165	typedef struct	498	typedef struct
166	{	499	{
167	W w;	500	W w;
168	int events;	501	int events;
169	} ANPENDING;	502	} ANPENDING;
170		503
		504	#if EV_USE_INOTIFY
		505	/* hash table entry per inotify-id */
		506	typedef struct
		507	{
		508	WL head;
		509	} ANFS;
		510	#endif
		511
		512	/* Heap Entry */
		513	#if EV_HEAP_CACHE_AT
		514	typedef struct {
		515	ev_tstamp at;
		516	WT w;
		517	} ANHE;
		518
		519	#define ANHE_w(he) (he).w /* access watcher, read-write */
		520	#define ANHE_at(he) (he).at /* access cached at, read-only */
		521	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		522	#else
		523	typedef WT ANHE;
		524
		525	#define ANHE_w(he) (he)
		526	#define ANHE_at(he) (he)->at
		527	#define ANHE_at_cache(he)
		528	#endif
		529
171	#if EV_MULTIPLICITY	530	#if EV_MULTIPLICITY
172		531
173	struct ev_loop	532	struct ev_loop
174	{	533	{
		534	ev_tstamp ev_rt_now;
		535	#define ev_rt_now ((loop)->ev_rt_now)
175	# define VAR(name,decl) decl;	536	#define VAR(name,decl) decl;
176	# include "ev_vars.h"	537	#include "ev_vars.h"
177	};
178	# undef VAR	538	#undef VAR
		539	};
179	# include "ev_wrap.h"	540	#include "ev_wrap.h"
		541
		542	static struct ev_loop default_loop_struct;
		543	struct ev_loop *ev_default_loop_ptr;
180		544
181	#else	545	#else
182		546
		547	ev_tstamp ev_rt_now;
183	# define VAR(name,decl) static decl;	548	#define VAR(name,decl) static decl;
184	# include "ev_vars.h"	549	#include "ev_vars.h"
185	# undef VAR	550	#undef VAR
		551
		552	static int ev_default_loop_ptr;
186		553
187	#endif	554	#endif
188		555
189	/*****************************************************************************/	556	/*****************************************************************************/
190		557
191	inline ev_tstamp	558	ev_tstamp
192	ev_time (void)	559	ev_time (void)
193	{	560	{
194	#if EV_USE_REALTIME	561	#if EV_USE_REALTIME
		562	if (expect_true (have_realtime))
		563	{
195	struct timespec ts;	564	struct timespec ts;
196	clock_gettime (CLOCK_REALTIME, &ts);	565	clock_gettime (CLOCK_REALTIME, &ts);
197	return ts.tv_sec + ts.tv_nsec * 1e-9;	566	return ts.tv_sec + ts.tv_nsec * 1e-9;
198	#else	567	}
		568	#endif
		569
199	struct timeval tv;	570	struct timeval tv;
200	gettimeofday (&tv, 0);	571	gettimeofday (&tv, 0);
201	return tv.tv_sec + tv.tv_usec * 1e-6;	572	return tv.tv_sec + tv.tv_usec * 1e-6;
202	#endif
203	}	573	}
204		574
205	inline ev_tstamp	575	inline_size ev_tstamp
206	get_clock (void)	576	get_clock (void)
207	{	577	{
208	#if EV_USE_MONOTONIC	578	#if EV_USE_MONOTONIC
209	if (expect_true (have_monotonic))	579	if (expect_true (have_monotonic))
210	{	580	{
…		…
215	#endif	585	#endif
216		586
217	return ev_time ();	587	return ev_time ();
218	}	588	}
219		589
		590	#if EV_MULTIPLICITY
220	ev_tstamp	591	ev_tstamp
221	ev_now (EV_P)	592	ev_now (EV_P)
222	{	593	{
223	return rt_now;	594	return ev_rt_now;
224	}	595	}
		596	#endif
225		597
226	#define array_roundsize(base,n) ((n) | 4 & ~3)	598	void
		599	ev_sleep (ev_tstamp delay)
		600	{
		601	if (delay > 0.)
		602	{
		603	#if EV_USE_NANOSLEEP
		604	struct timespec ts;
227		605
		606	ts.tv_sec = (time_t)delay;
		607	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		608
		609	nanosleep (&ts, 0);
		610	#elif defined(_WIN32)
		611	Sleep ((unsigned long)(delay * 1e3));
		612	#else
		613	struct timeval tv;
		614
		615	tv.tv_sec = (time_t)delay;
		616	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		617
		618	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		619	/* somehting nto guaranteed by newer posix versions, but guaranteed */
		620	/* by older ones */
		621	select (0, 0, 0, 0, &tv);
		622	#endif
		623	}
		624	}
		625
		626	/*****************************************************************************/
		627
		628	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		629
		630	inline_size int
		631	array_nextsize (int elem, int cur, int cnt)
		632	{
		633	int ncur = cur + 1;
		634
		635	do
		636	ncur <<= 1;
		637	while (cnt > ncur);
		638
		639	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		640	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		641	{
		642	ncur *= elem;
		643	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		644	ncur = ncur - sizeof (void *) * 4;
		645	ncur /= elem;
		646	}
		647
		648	return ncur;
		649	}
		650
		651	static noinline void *
		652	array_realloc (int elem, void *base, int *cur, int cnt)
		653	{
		654	*cur = array_nextsize (elem, *cur, cnt);
		655	return ev_realloc (base, elem * *cur);
		656	}
		657
		658	#define array_init_zero(base,count) \
		659	memset ((void *)(base), 0, sizeof (*(base)) * (count))
		660
228	#define array_needsize(base,cur,cnt,init) \	661	#define array_needsize(type,base,cur,cnt,init) \
229	if (expect_false ((cnt) > cur)) \	662	if (expect_false ((cnt) > (cur))) \
230	{ \	663	{ \
231	int newcnt = cur; \	664	int ocur_ = (cur); \
232	do \	665	(base) = (type *)array_realloc \
233	{ \	666	(sizeof (type), (base), &(cur), (cnt)); \
234	newcnt = array_roundsize (base, newcnt << 1); \	667	init ((base) + (ocur_), (cur) - ocur_); \
235	} \
236	while ((cnt) > newcnt); \
237	\
238	base = realloc (base, sizeof (*base) * (newcnt)); \
239	init (base + cur, newcnt - cur); \
240	cur = newcnt; \
241	}	668	}
242		669
		670	#if 0
243	#define array_slim(stem) \	671	#define array_slim(type,stem) \
244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	672	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
245	{ \	673	{ \
246	stem ## max = array_roundsize (stem ## cnt >> 1); \	674	stem ## max = array_roundsize (stem ## cnt >> 1); \
247	base = realloc (base, sizeof (*base) * (stem ## max)); \	675	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	676	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
249	}	677	}
		678	#endif
250		679
251	#define array_free(stem, idx) \	680	#define array_free(stem, idx) \
252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	681	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
253		682
254	/*****************************************************************************/	683	/*****************************************************************************/
255		684
256	static void	685	void noinline
257	anfds_init (ANFD *base, int count)	686	ev_feed_event (EV_P_ void *w, int revents)
258	{	687	{
259	while (count--)	688	W w_ = (W)w;
260	{	689	int pri = ABSPRI (w_);
261	base->head = 0;
262	base->events = EV_NONE;
263	base->reify = 0;
264		690
265	++base;	691	if (expect_false (w_->pending))
		692	pendings [pri][w_->pending - 1].events |= revents;
		693	else
266	}	694	{
267	}	695	w_->pending = ++pendingcnt [pri];
268		696	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
269	static void	697	pendings [pri][w_->pending - 1].w = w_;
270	event (EV_P_ W w, int events)
271	{
272	if (w->pending)
273	{
274	pendings [ABSPRI (w)][w->pending - 1].events |= events;	698	pendings [pri][w_->pending - 1].events = revents;
275	return;
276	}	699	}
277
278	w->pending = ++pendingcnt [ABSPRI (w)];
279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
280	pendings [ABSPRI (w)][w->pending - 1].w = w;
281	pendings [ABSPRI (w)][w->pending - 1].events = events;
282	}	700	}
283		701
284	static void	702	inline_speed void
		703	feed_reverse (EV_P_ W w)
		704	{
		705	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		706	rfeeds [rfeedcnt++] = w;
		707	}
		708
		709	inline_size void
		710	feed_reverse_done (EV_P_ int revents)
		711	{
		712	do
		713	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		714	while (rfeedcnt);
		715	}
		716
		717	inline_speed void
285	queue_events (EV_P_ W *events, int eventcnt, int type)	718	queue_events (EV_P_ W *events, int eventcnt, int type)
286	{	719	{
287	int i;	720	int i;
288		721
289	for (i = 0; i < eventcnt; ++i)	722	for (i = 0; i < eventcnt; ++i)
290	event (EV_A_ events [i], type);	723	ev_feed_event (EV_A_ events [i], type);
291	}	724	}
292		725
293	static void	726	/*****************************************************************************/
		727
		728	inline_speed void
294	fd_event (EV_P_ int fd, int events)	729	fd_event (EV_P_ int fd, int revents)
295	{	730	{
296	ANFD *anfd = anfds + fd;	731	ANFD *anfd = anfds + fd;
297	struct ev_io *w;	732	ev_io *w;
298		733
299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	734	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
300	{	735	{
301	int ev = w->events & events;	736	int ev = w->events & revents;
302		737
303	if (ev)	738	if (ev)
304	event (EV_A_ (W)w, ev);	739	ev_feed_event (EV_A_ (W)w, ev);
305	}	740	}
306	}	741	}
307		742
308	/*****************************************************************************/	743	void
		744	ev_feed_fd_event (EV_P_ int fd, int revents)
		745	{
		746	if (fd >= 0 && fd < anfdmax)
		747	fd_event (EV_A_ fd, revents);
		748	}
309		749
310	static void	750	inline_size void
311	fd_reify (EV_P)	751	fd_reify (EV_P)
312	{	752	{
313	int i;	753	int i;
314		754
315	for (i = 0; i < fdchangecnt; ++i)	755	for (i = 0; i < fdchangecnt; ++i)
316	{	756	{
317	int fd = fdchanges [i];	757	int fd = fdchanges [i];
318	ANFD *anfd = anfds + fd;	758	ANFD *anfd = anfds + fd;
319	struct ev_io *w;	759	ev_io *w;
320		760
321	int events = 0;	761	unsigned char events = 0;
322		762
323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	763	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
324	events |= w->events;	764	events |= (unsigned char)w->events;
325		765
		766	#if EV_SELECT_IS_WINSOCKET
		767	if (events)
		768	{
		769	unsigned long arg;
		770	#ifdef EV_FD_TO_WIN32_HANDLE
		771	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		772	#else
		773	anfd->handle = _get_osfhandle (fd);
		774	#endif
		775	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
		776	}
		777	#endif
		778
		779	{
		780	unsigned char o_events = anfd->events;
		781	unsigned char o_reify = anfd->reify;
		782
326	anfd->reify = 0;	783	anfd->reify = 0;
327
328	method_modify (EV_A_ fd, anfd->events, events);
329	anfd->events = events;	784	anfd->events = events;
		785
		786	if (o_events != events || o_reify & EV__IOFDSET)
		787	backend_modify (EV_A_ fd, o_events, events);
		788	}
330	}	789	}
331		790
332	fdchangecnt = 0;	791	fdchangecnt = 0;
333	}	792	}
334		793
335	static void	794	inline_size void
336	fd_change (EV_P_ int fd)	795	fd_change (EV_P_ int fd, int flags)
337	{	796	{
338	if (anfds [fd].reify || fdchangecnt < 0)	797	unsigned char reify = anfds [fd].reify;
339	return;
340
341	anfds [fd].reify = 1;	798	anfds [fd].reify |= flags;
342		799
		800	if (expect_true (!reify))
		801	{
343	++fdchangecnt;	802	++fdchangecnt;
344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	803	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
345	fdchanges [fdchangecnt - 1] = fd;	804	fdchanges [fdchangecnt - 1] = fd;
		805	}
346	}	806	}
347		807
348	static void	808	inline_speed void
349	fd_kill (EV_P_ int fd)	809	fd_kill (EV_P_ int fd)
350	{	810	{
351	struct ev_io *w;	811	ev_io *w;
352		812
353	while ((w = (struct ev_io *)anfds [fd].head))	813	while ((w = (ev_io *)anfds [fd].head))
354	{	814	{
355	ev_io_stop (EV_A_ w);	815	ev_io_stop (EV_A_ w);
356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	816	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
357	}	817	}
		818	}
		819
		820	inline_size int
		821	fd_valid (int fd)
		822	{
		823	#ifdef _WIN32
		824	return _get_osfhandle (fd) != -1;
		825	#else
		826	return fcntl (fd, F_GETFD) != -1;
		827	#endif
358	}	828	}
359		829
360	/* called on EBADF to verify fds */	830	/* called on EBADF to verify fds */
361	static void	831	static void noinline
362	fd_ebadf (EV_P)	832	fd_ebadf (EV_P)
363	{	833	{
364	int fd;	834	int fd;
365		835
366	for (fd = 0; fd < anfdmax; ++fd)	836	for (fd = 0; fd < anfdmax; ++fd)
367	if (anfds [fd].events)	837	if (anfds [fd].events)
368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	838	if (!fd_valid (fd) && errno == EBADF)
369	fd_kill (EV_A_ fd);	839	fd_kill (EV_A_ fd);
370	}	840	}
371		841
372	/* called on ENOMEM in select/poll to kill some fds and retry */	842	/* called on ENOMEM in select/poll to kill some fds and retry */
373	static void	843	static void noinline
374	fd_enomem (EV_P)	844	fd_enomem (EV_P)
375	{	845	{
376	int fd;	846	int fd;
377		847
378	for (fd = anfdmax; fd--; )	848	for (fd = anfdmax; fd--; )
…		…
381	fd_kill (EV_A_ fd);	851	fd_kill (EV_A_ fd);
382	return;	852	return;
383	}	853	}
384	}	854	}
385		855
386	/* susually called after fork if method needs to re-arm all fds from scratch */	856	/* usually called after fork if backend needs to re-arm all fds from scratch */
387	static void	857	static void noinline
388	fd_rearm_all (EV_P)	858	fd_rearm_all (EV_P)
389	{	859	{
390	int fd;	860	int fd;
391		861
392	/* this should be highly optimised to not do anything but set a flag */
393	for (fd = 0; fd < anfdmax; ++fd)	862	for (fd = 0; fd < anfdmax; ++fd)
394	if (anfds [fd].events)	863	if (anfds [fd].events)
395	{	864	{
396	anfds [fd].events = 0;	865	anfds [fd].events = 0;
		866	anfds [fd].emask = 0;
397	fd_change (EV_A_ fd);	867	fd_change (EV_A_ fd, EV__IOFDSET | 1);
398	}	868	}
399	}	869	}
400		870
401	/*****************************************************************************/	871	/*****************************************************************************/
402		872
403	static void	873	/*
404	upheap (WT *heap, int k)	874	* the heap functions want a real array index. array index 0 uis guaranteed to not
405	{	875	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
406	WT w = heap [k];	876	* the branching factor of the d-tree.
		877	*/
407		878
408	while (k && heap [k >> 1]->at > w->at)	879	/*
409	{	880	* at the moment we allow libev the luxury of two heaps,
410	heap [k] = heap [k >> 1];	881	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
411	((W)heap [k])->active = k + 1;	882	* which is more cache-efficient.
412	k >>= 1;	883	* the difference is about 5% with 50000+ watchers.
413	}	884	*/
		885	#if EV_USE_4HEAP
414		886
415	heap [k] = w;	887	#define DHEAP 4
416	((W)heap [k])->active = k + 1;	888	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		889	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		890	#define UPHEAP_DONE(p,k) ((p) == (k))
417		891
418	}	892	/* away from the root */
419		893	inline_speed void
420	static void
421	downheap (WT *heap, int N, int k)	894	downheap (ANHE *heap, int N, int k)
422	{	895	{
423	WT w = heap [k];	896	ANHE he = heap [k];
		897	ANHE *E = heap + N + HEAP0;
424		898
425	while (k < (N >> 1))	899	for (;;)
426	{	900	{
427	int j = k << 1;	901	ev_tstamp minat;
		902	ANHE *minpos;
		903	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
428		904
429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	905	/* find minimum child */
		906	if (expect_true (pos + DHEAP - 1 < E))
430	++j;	907	{
431		908	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
432	if (w->at <= heap [j]->at)	909	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		910	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		911	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		912	}
		913	else if (pos < E)
		914	{
		915	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		916	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		917	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		918	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		919	}
		920	else
433	break;	921	break;
434		922
		923	if (ANHE_at (he) <= minat)
		924	break;
		925
		926	heap [k] = *minpos;
		927	ev_active (ANHE_w (*minpos)) = k;
		928
		929	k = minpos - heap;
		930	}
		931
		932	heap [k] = he;
		933	ev_active (ANHE_w (he)) = k;
		934	}
		935
		936	#else /* 4HEAP */
		937
		938	#define HEAP0 1
		939	#define HPARENT(k) ((k) >> 1)
		940	#define UPHEAP_DONE(p,k) (!(p))
		941
		942	/* away from the root */
		943	inline_speed void
		944	downheap (ANHE *heap, int N, int k)
		945	{
		946	ANHE he = heap [k];
		947
		948	for (;;)
		949	{
		950	int c = k << 1;
		951
		952	if (c > N + HEAP0 - 1)
		953	break;
		954
		955	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		956	? 1 : 0;
		957
		958	if (ANHE_at (he) <= ANHE_at (heap [c]))
		959	break;
		960
435	heap [k] = heap [j];	961	heap [k] = heap [c];
436	((W)heap [k])->active = k + 1;	962	ev_active (ANHE_w (heap [k])) = k;
		963
437	k = j;	964	k = c;
438	}	965	}
439		966
440	heap [k] = w;	967	heap [k] = he;
441	((W)heap [k])->active = k + 1;	968	ev_active (ANHE_w (he)) = k;
		969	}
		970	#endif
		971
		972	/* towards the root */
		973	inline_speed void
		974	upheap (ANHE *heap, int k)
		975	{
		976	ANHE he = heap [k];
		977
		978	for (;;)
		979	{
		980	int p = HPARENT (k);
		981
		982	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		983	break;
		984
		985	heap [k] = heap [p];
		986	ev_active (ANHE_w (heap [k])) = k;
		987	k = p;
		988	}
		989
		990	heap [k] = he;
		991	ev_active (ANHE_w (he)) = k;
		992	}
		993
		994	inline_size void
		995	adjustheap (ANHE *heap, int N, int k)
		996	{
		997	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
		998	upheap (heap, k);
		999	else
		1000	downheap (heap, N, k);
		1001	}
		1002
		1003	/* rebuild the heap: this function is used only once and executed rarely */
		1004	inline_size void
		1005	reheap (ANHE *heap, int N)
		1006	{
		1007	int i;
		1008
		1009	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		1010	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		1011	for (i = 0; i < N; ++i)
		1012	upheap (heap, i + HEAP0);
442	}	1013	}
443		1014
444	/*****************************************************************************/	1015	/*****************************************************************************/
445		1016
446	typedef struct	1017	typedef struct
447	{	1018	{
448	WL head;	1019	WL head;
449	sig_atomic_t volatile gotsig;	1020	EV_ATOMIC_T gotsig;
450	} ANSIG;	1021	} ANSIG;
451		1022
452	static ANSIG *signals;	1023	static ANSIG *signals;
453	static int signalmax;	1024	static int signalmax;
454		1025
455	static int sigpipe [2];	1026	static EV_ATOMIC_T gotsig;
456	static sig_atomic_t volatile gotsig;	1027
457	static struct ev_io sigev;	1028	/*****************************************************************************/
		1029
		1030	inline_speed void
		1031	fd_intern (int fd)
		1032	{
		1033	#ifdef _WIN32
		1034	unsigned long arg = 1;
		1035	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		1036	#else
		1037	fcntl (fd, F_SETFD, FD_CLOEXEC);
		1038	fcntl (fd, F_SETFL, O_NONBLOCK);
		1039	#endif
		1040	}
		1041
		1042	static void noinline
		1043	evpipe_init (EV_P)
		1044	{
		1045	if (!ev_is_active (&pipeev))
		1046	{
		1047	#if EV_USE_EVENTFD
		1048	if ((evfd = eventfd (0, 0)) >= 0)
		1049	{
		1050	evpipe [0] = -1;
		1051	fd_intern (evfd);
		1052	ev_io_set (&pipeev, evfd, EV_READ);
		1053	}
		1054	else
		1055	#endif
		1056	{
		1057	while (pipe (evpipe))
		1058	ev_syserr ("(libev) error creating signal/async pipe");
		1059
		1060	fd_intern (evpipe [0]);
		1061	fd_intern (evpipe [1]);
		1062	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1063	}
		1064
		1065	ev_io_start (EV_A_ &pipeev);
		1066	ev_unref (EV_A); /* watcher should not keep loop alive */
		1067	}
		1068	}
		1069
		1070	inline_size void
		1071	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1072	{
		1073	if (!*flag)
		1074	{
		1075	int old_errno = errno; /* save errno because write might clobber it */
		1076
		1077	*flag = 1;
		1078
		1079	#if EV_USE_EVENTFD
		1080	if (evfd >= 0)
		1081	{
		1082	uint64_t counter = 1;
		1083	write (evfd, &counter, sizeof (uint64_t));
		1084	}
		1085	else
		1086	#endif
		1087	write (evpipe [1], &old_errno, 1);
		1088
		1089	errno = old_errno;
		1090	}
		1091	}
458		1092
459	static void	1093	static void
460	signals_init (ANSIG *base, int count)	1094	pipecb (EV_P_ ev_io *iow, int revents)
461	{	1095	{
462	while (count--)	1096	#if EV_USE_EVENTFD
		1097	if (evfd >= 0)
		1098	{
		1099	uint64_t counter;
		1100	read (evfd, &counter, sizeof (uint64_t));
463	{	1101	}
464	base->head = 0;	1102	else
		1103	#endif
		1104	{
		1105	char dummy;
		1106	read (evpipe [0], &dummy, 1);
		1107	}
		1108
		1109	if (gotsig && ev_is_default_loop (EV_A))
		1110	{
		1111	int signum;
465	base->gotsig = 0;	1112	gotsig = 0;
466		1113
467	++base;	1114	for (signum = signalmax; signum--; )
		1115	if (signals [signum].gotsig)
		1116	ev_feed_signal_event (EV_A_ signum + 1);
		1117	}
		1118
		1119	#if EV_ASYNC_ENABLE
		1120	if (gotasync)
468	}	1121	{
		1122	int i;
		1123	gotasync = 0;
		1124
		1125	for (i = asynccnt; i--; )
		1126	if (asyncs [i]->sent)
		1127	{
		1128	asyncs [i]->sent = 0;
		1129	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1130	}
		1131	}
		1132	#endif
469	}	1133	}
		1134
		1135	/*****************************************************************************/
470		1136
471	static void	1137	static void
472	sighandler (int signum)	1138	ev_sighandler (int signum)
473	{	1139	{
		1140	#if EV_MULTIPLICITY
		1141	struct ev_loop *loop = &default_loop_struct;
		1142	#endif
		1143
474	#if WIN32	1144	#if _WIN32
475	signal (signum, sighandler);	1145	signal (signum, ev_sighandler);
476	#endif	1146	#endif
477		1147
478	signals [signum - 1].gotsig = 1;	1148	signals [signum - 1].gotsig = 1;
479		1149	evpipe_write (EV_A_ &gotsig);
480	if (!gotsig)
481	{
482	int old_errno = errno;
483	gotsig = 1;
484	write (sigpipe [1], &signum, 1);
485	errno = old_errno;
486	}
487	}	1150	}
488		1151
489	static void	1152	void noinline
490	sigcb (EV_P_ struct ev_io *iow, int revents)	1153	ev_feed_signal_event (EV_P_ int signum)
491	{	1154	{
492	WL w;	1155	WL w;
		1156
		1157	#if EV_MULTIPLICITY
		1158	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1159	#endif
		1160
493	int signum;	1161	--signum;
494		1162
495	read (sigpipe [0], &revents, 1);	1163	if (signum < 0 || signum >= signalmax)
496	gotsig = 0;	1164	return;
497		1165
498	for (signum = signalmax; signum--; )
499	if (signals [signum].gotsig)
500	{
501	signals [signum].gotsig = 0;	1166	signals [signum].gotsig = 0;
502		1167
503	for (w = signals [signum].head; w; w = w->next)	1168	for (w = signals [signum].head; w; w = w->next)
504	event (EV_A_ (W)w, EV_SIGNAL);	1169	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
505	}
506	}
507
508	static void
509	siginit (EV_P)
510	{
511	#ifndef WIN32
512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
514
515	/* rather than sort out wether we really need nb, set it */
516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
518	#endif
519
520	ev_io_set (&sigev, sigpipe [0], EV_READ);
521	ev_io_start (EV_A_ &sigev);
522	ev_unref (EV_A); /* child watcher should not keep loop alive */
523	}	1170	}
524		1171
525	/*****************************************************************************/	1172	/*****************************************************************************/
526		1173
		1174	static WL childs [EV_PID_HASHSIZE];
		1175
527	#ifndef WIN32	1176	#ifndef _WIN32
528		1177
529	static struct ev_child *childs [PID_HASHSIZE];
530	static struct ev_signal childev;	1178	static ev_signal childev;
		1179
		1180	#ifndef WIFCONTINUED
		1181	# define WIFCONTINUED(status) 0
		1182	#endif
		1183
		1184	inline_speed void
		1185	child_reap (EV_P_ int chain, int pid, int status)
		1186	{
		1187	ev_child *w;
		1188	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1189
		1190	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1191	{
		1192	if ((w->pid == pid || !w->pid)
		1193	&& (!traced || (w->flags & 1)))
		1194	{
		1195	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1196	w->rpid = pid;
		1197	w->rstatus = status;
		1198	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1199	}
		1200	}
		1201	}
531		1202
532	#ifndef WCONTINUED	1203	#ifndef WCONTINUED
533	# define WCONTINUED 0	1204	# define WCONTINUED 0
534	#endif	1205	#endif
535		1206
536	static void	1207	static void
537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
538	{
539	struct ev_child *w;
540
541	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
542	if (w->pid == pid || !w->pid)
543	{
544	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
545	w->rpid = pid;
546	w->rstatus = status;
547	event (EV_A_ (W)w, EV_CHILD);
548	}
549	}
550
551	static void
552	childcb (EV_P_ struct ev_signal *sw, int revents)	1208	childcb (EV_P_ ev_signal *sw, int revents)
553	{	1209	{
554	int pid, status;	1210	int pid, status;
555		1211
		1212	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
556	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1213	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
557	{	1214	if (!WCONTINUED
		1215	|| errno != EINVAL
		1216	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1217	return;
		1218
558	/* make sure we are called again until all childs have been reaped */	1219	/* make sure we are called again until all children have been reaped */
		1220	/* we need to do it this way so that the callback gets called before we continue */
559	event (EV_A_ (W)sw, EV_SIGNAL);	1221	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
560		1222
561	child_reap (EV_A_ sw, pid, pid, status);	1223	child_reap (EV_A_ pid, pid, status);
		1224	if (EV_PID_HASHSIZE > 1)
562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1225	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
563	}
564	}	1226	}
565		1227
566	#endif	1228	#endif
567		1229
568	/*****************************************************************************/	1230	/*****************************************************************************/
569		1231
		1232	#if EV_USE_PORT
		1233	# include "ev_port.c"
		1234	#endif
570	#if EV_USE_KQUEUE	1235	#if EV_USE_KQUEUE
571	# include "ev_kqueue.c"	1236	# include "ev_kqueue.c"
572	#endif	1237	#endif
573	#if EV_USE_EPOLL	1238	#if EV_USE_EPOLL
574	# include "ev_epoll.c"	1239	# include "ev_epoll.c"
…		…
591	{	1256	{
592	return EV_VERSION_MINOR;	1257	return EV_VERSION_MINOR;
593	}	1258	}
594		1259
595	/* return true if we are running with elevated privileges and should ignore env variables */	1260	/* return true if we are running with elevated privileges and should ignore env variables */
596	static int	1261	int inline_size
597	enable_secure (void)	1262	enable_secure (void)
598	{	1263	{
599	#ifdef WIN32	1264	#ifdef _WIN32
600	return 0;	1265	return 0;
601	#else	1266	#else
602	return getuid () != geteuid ()	1267	return getuid () != geteuid ()
603	|| getgid () != getegid ();	1268	|| getgid () != getegid ();
604	#endif	1269	#endif
605	}	1270	}
606		1271
607	int	1272	unsigned int
608	ev_method (EV_P)	1273	ev_supported_backends (void)
609	{	1274	{
610	return method;	1275	unsigned int flags = 0;
611	}
612		1276
613	static void	1277	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
614	loop_init (EV_P_ int methods)	1278	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1279	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1280	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1281	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1282
		1283	return flags;
		1284	}
		1285
		1286	unsigned int
		1287	ev_recommended_backends (void)
615	{	1288	{
616	if (!method)	1289	unsigned int flags = ev_supported_backends ();
		1290
		1291	#ifndef __NetBSD__
		1292	/* kqueue is borked on everything but netbsd apparently */
		1293	/* it usually doesn't work correctly on anything but sockets and pipes */
		1294	flags &= ~EVBACKEND_KQUEUE;
		1295	#endif
		1296	#ifdef __APPLE__
		1297	/* only select works correctly on that "unix-certified" platform */
		1298	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1299	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
		1300	#endif
		1301
		1302	return flags;
		1303	}
		1304
		1305	unsigned int
		1306	ev_embeddable_backends (void)
		1307	{
		1308	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1309
		1310	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1311	/* please fix it and tell me how to detect the fix */
		1312	flags &= ~EVBACKEND_EPOLL;
		1313
		1314	return flags;
		1315	}
		1316
		1317	unsigned int
		1318	ev_backend (EV_P)
		1319	{
		1320	return backend;
		1321	}
		1322
		1323	unsigned int
		1324	ev_loop_count (EV_P)
		1325	{
		1326	return loop_count;
		1327	}
		1328
		1329	void
		1330	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1331	{
		1332	io_blocktime = interval;
		1333	}
		1334
		1335	void
		1336	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1337	{
		1338	timeout_blocktime = interval;
		1339	}
		1340
		1341	static void noinline
		1342	loop_init (EV_P_ unsigned int flags)
		1343	{
		1344	if (!backend)
617	{	1345	{
		1346	#if EV_USE_REALTIME
		1347	if (!have_realtime)
		1348	{
		1349	struct timespec ts;
		1350
		1351	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1352	have_realtime = 1;
		1353	}
		1354	#endif
		1355
618	#if EV_USE_MONOTONIC	1356	#if EV_USE_MONOTONIC
		1357	if (!have_monotonic)
		1358	{
		1359	struct timespec ts;
		1360
		1361	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1362	have_monotonic = 1;
		1363	}
		1364	#endif
		1365
		1366	ev_rt_now = ev_time ();
		1367	mn_now = get_clock ();
		1368	now_floor = mn_now;
		1369	rtmn_diff = ev_rt_now - mn_now;
		1370
		1371	io_blocktime = 0.;
		1372	timeout_blocktime = 0.;
		1373	backend = 0;
		1374	backend_fd = -1;
		1375	gotasync = 0;
		1376	#if EV_USE_INOTIFY
		1377	fs_fd = -2;
		1378	#endif
		1379
		1380	/* pid check not overridable via env */
		1381	#ifndef _WIN32
		1382	if (flags & EVFLAG_FORKCHECK)
		1383	curpid = getpid ();
		1384	#endif
		1385
		1386	if (!(flags & EVFLAG_NOENV)
		1387	&& !enable_secure ()
		1388	&& getenv ("LIBEV_FLAGS"))
		1389	flags = atoi (getenv ("LIBEV_FLAGS"));
		1390
		1391	if (!(flags & 0x0000ffffU))
		1392	flags |= ev_recommended_backends ();
		1393
		1394	#if EV_USE_PORT
		1395	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1396	#endif
		1397	#if EV_USE_KQUEUE
		1398	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1399	#endif
		1400	#if EV_USE_EPOLL
		1401	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1402	#endif
		1403	#if EV_USE_POLL
		1404	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1405	#endif
		1406	#if EV_USE_SELECT
		1407	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1408	#endif
		1409
		1410	ev_init (&pipeev, pipecb);
		1411	ev_set_priority (&pipeev, EV_MAXPRI);
		1412	}
		1413	}
		1414
		1415	static void noinline
		1416	loop_destroy (EV_P)
		1417	{
		1418	int i;
		1419
		1420	if (ev_is_active (&pipeev))
		1421	{
		1422	ev_ref (EV_A); /* signal watcher */
		1423	ev_io_stop (EV_A_ &pipeev);
		1424
		1425	#if EV_USE_EVENTFD
		1426	if (evfd >= 0)
		1427	close (evfd);
		1428	#endif
		1429
		1430	if (evpipe [0] >= 0)
		1431	{
		1432	close (evpipe [0]);
		1433	close (evpipe [1]);
		1434	}
		1435	}
		1436
		1437	#if EV_USE_INOTIFY
		1438	if (fs_fd >= 0)
		1439	close (fs_fd);
		1440	#endif
		1441
		1442	if (backend_fd >= 0)
		1443	close (backend_fd);
		1444
		1445	#if EV_USE_PORT
		1446	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1447	#endif
		1448	#if EV_USE_KQUEUE
		1449	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1450	#endif
		1451	#if EV_USE_EPOLL
		1452	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1453	#endif
		1454	#if EV_USE_POLL
		1455	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1456	#endif
		1457	#if EV_USE_SELECT
		1458	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1459	#endif
		1460
		1461	for (i = NUMPRI; i--; )
		1462	{
		1463	array_free (pending, [i]);
		1464	#if EV_IDLE_ENABLE
		1465	array_free (idle, [i]);
		1466	#endif
		1467	}
		1468
		1469	ev_free (anfds); anfdmax = 0;
		1470
		1471	/* have to use the microsoft-never-gets-it-right macro */
		1472	array_free (rfeed, EMPTY);
		1473	array_free (fdchange, EMPTY);
		1474	array_free (timer, EMPTY);
		1475	#if EV_PERIODIC_ENABLE
		1476	array_free (periodic, EMPTY);
		1477	#endif
		1478	#if EV_FORK_ENABLE
		1479	array_free (fork, EMPTY);
		1480	#endif
		1481	array_free (prepare, EMPTY);
		1482	array_free (check, EMPTY);
		1483	#if EV_ASYNC_ENABLE
		1484	array_free (async, EMPTY);
		1485	#endif
		1486
		1487	backend = 0;
		1488	}
		1489
		1490	#if EV_USE_INOTIFY
		1491	inline_size void infy_fork (EV_P);
		1492	#endif
		1493
		1494	inline_size void
		1495	loop_fork (EV_P)
		1496	{
		1497	#if EV_USE_PORT
		1498	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1499	#endif
		1500	#if EV_USE_KQUEUE
		1501	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1502	#endif
		1503	#if EV_USE_EPOLL
		1504	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1505	#endif
		1506	#if EV_USE_INOTIFY
		1507	infy_fork (EV_A);
		1508	#endif
		1509
		1510	if (ev_is_active (&pipeev))
		1511	{
		1512	/* this "locks" the handlers against writing to the pipe */
		1513	/* while we modify the fd vars */
		1514	gotsig = 1;
		1515	#if EV_ASYNC_ENABLE
		1516	gotasync = 1;
		1517	#endif
		1518
		1519	ev_ref (EV_A);
		1520	ev_io_stop (EV_A_ &pipeev);
		1521
		1522	#if EV_USE_EVENTFD
		1523	if (evfd >= 0)
		1524	close (evfd);
		1525	#endif
		1526
		1527	if (evpipe [0] >= 0)
		1528	{
		1529	close (evpipe [0]);
		1530	close (evpipe [1]);
		1531	}
		1532
		1533	evpipe_init (EV_A);
		1534	/* now iterate over everything, in case we missed something */
		1535	pipecb (EV_A_ &pipeev, EV_READ);
		1536	}
		1537
		1538	postfork = 0;
		1539	}
		1540
		1541	#if EV_MULTIPLICITY
		1542
		1543	struct ev_loop *
		1544	ev_loop_new (unsigned int flags)
		1545	{
		1546	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1547
		1548	memset (loop, 0, sizeof (struct ev_loop));
		1549
		1550	loop_init (EV_A_ flags);
		1551
		1552	if (ev_backend (EV_A))
		1553	return loop;
		1554
		1555	return 0;
		1556	}
		1557
		1558	void
		1559	ev_loop_destroy (EV_P)
		1560	{
		1561	loop_destroy (EV_A);
		1562	ev_free (loop);
		1563	}
		1564
		1565	void
		1566	ev_loop_fork (EV_P)
		1567	{
		1568	postfork = 1; /* must be in line with ev_default_fork */
		1569	}
		1570
		1571	#if EV_VERIFY
		1572	static void noinline
		1573	verify_watcher (EV_P_ W w)
		1574	{
		1575	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1576
		1577	if (w->pending)
		1578	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1579	}
		1580
		1581	static void noinline
		1582	verify_heap (EV_P_ ANHE *heap, int N)
		1583	{
		1584	int i;
		1585
		1586	for (i = HEAP0; i < N + HEAP0; ++i)
		1587	{
		1588	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1589	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1590	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1591
		1592	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1593	}
		1594	}
		1595
		1596	static void noinline
		1597	array_verify (EV_P_ W *ws, int cnt)
		1598	{
		1599	while (cnt--)
		1600	{
		1601	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1602	verify_watcher (EV_A_ ws [cnt]);
		1603	}
		1604	}
		1605	#endif
		1606
		1607	void
		1608	ev_loop_verify (EV_P)
		1609	{
		1610	#if EV_VERIFY
		1611	int i;
		1612	WL w;
		1613
		1614	assert (activecnt >= -1);
		1615
		1616	assert (fdchangemax >= fdchangecnt);
		1617	for (i = 0; i < fdchangecnt; ++i)
		1618	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		1619
		1620	assert (anfdmax >= 0);
		1621	for (i = 0; i < anfdmax; ++i)
		1622	for (w = anfds [i].head; w; w = w->next)
619	{	1623	{
620	struct timespec ts;	1624	verify_watcher (EV_A_ (W)w);
621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1625	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
622	have_monotonic = 1;	1626	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
623	}	1627	}
624	#endif
625		1628
626	rt_now = ev_time ();	1629	assert (timermax >= timercnt);
627	mn_now = get_clock ();	1630	verify_heap (EV_A_ timers, timercnt);
628	now_floor = mn_now;
629	rtmn_diff = rt_now - mn_now;
630		1631
631	if (methods == EVMETHOD_AUTO)	1632	#if EV_PERIODIC_ENABLE
632	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1633	assert (periodicmax >= periodiccnt);
633	methods = atoi (getenv ("LIBEV_METHODS"));	1634	verify_heap (EV_A_ periodics, periodiccnt);
634	else
635	methods = EVMETHOD_ANY;
636
637	method = 0;
638	#if EV_USE_WIN32
639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
640	#endif
641	#if EV_USE_KQUEUE
642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
643	#endif
644	#if EV_USE_EPOLL
645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
646	#endif
647	#if EV_USE_POLL
648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
649	#endif
650	#if EV_USE_SELECT
651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
652	#endif
653	}
654	}
655
656	void
657	loop_destroy (EV_P)
658	{
659	int i;
660
661	#if EV_USE_WIN32
662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
663	#endif
664	#if EV_USE_KQUEUE
665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
666	#endif
667	#if EV_USE_EPOLL
668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
669	#endif
670	#if EV_USE_POLL
671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
672	#endif
673	#if EV_USE_SELECT
674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
675	#endif	1635	#endif
676		1636
677	for (i = NUMPRI; i--; )	1637	for (i = NUMPRI; i--; )
678	array_free (pending, [i]);	1638	{
		1639	assert (pendingmax [i] >= pendingcnt [i]);
		1640	#if EV_IDLE_ENABLE
		1641	assert (idleall >= 0);
		1642	assert (idlemax [i] >= idlecnt [i]);
		1643	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1644	#endif
		1645	}
679		1646
680	array_free (fdchange, );	1647	#if EV_FORK_ENABLE
681	array_free (timer, );	1648	assert (forkmax >= forkcnt);
682	array_free (periodic, );	1649	array_verify (EV_A_ (W *)forks, forkcnt);
683	array_free (idle, );	1650	#endif
684	array_free (prepare, );
685	array_free (check, );
686		1651
687	method = 0;	1652	#if EV_ASYNC_ENABLE
688	/*TODO*/	1653	assert (asyncmax >= asynccnt);
689	}	1654	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1655	#endif
690		1656
691	void	1657	assert (preparemax >= preparecnt);
692	loop_fork (EV_P)	1658	array_verify (EV_A_ (W *)prepares, preparecnt);
693	{	1659
694	/*TODO*/	1660	assert (checkmax >= checkcnt);
695	#if EV_USE_EPOLL	1661	array_verify (EV_A_ (W *)checks, checkcnt);
696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1662
		1663	# if 0
		1664	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1665	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
697	#endif	1666	# endif
698	#if EV_USE_KQUEUE
699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
700	#endif	1667	#endif
701	}	1668	}
		1669
		1670	#endif /* multiplicity */
702		1671
703	#if EV_MULTIPLICITY	1672	#if EV_MULTIPLICITY
704	struct ev_loop *	1673	struct ev_loop *
705	ev_loop_new (int methods)	1674	ev_default_loop_init (unsigned int flags)
706	{	1675	#else
707	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));	1676	int
708		1677	ev_default_loop (unsigned int flags)
709	loop_init (EV_A_ methods);
710
711	if (ev_method (EV_A))
712	return loop;
713
714	return 0;
715	}
716
717	void
718	ev_loop_destroy (EV_P)
719	{
720	loop_destroy (EV_A);
721	free (loop);
722	}
723
724	void
725	ev_loop_fork (EV_P)
726	{
727	loop_fork (EV_A);
728	}
729
730	#endif	1678	#endif
731		1679	{
		1680	if (!ev_default_loop_ptr)
		1681	{
732	#if EV_MULTIPLICITY	1682	#if EV_MULTIPLICITY
733	struct ev_loop default_loop_struct;	1683	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
734	static struct ev_loop *default_loop;
735
736	struct ev_loop *
737	#else	1684	#else
738	static int default_loop;
739
740	int
741	#endif
742	ev_default_loop (int methods)
743	{
744	if (sigpipe [0] == sigpipe [1])
745	if (pipe (sigpipe))
746	return 0;
747
748	if (!default_loop)
749	{
750	#if EV_MULTIPLICITY
751	struct ev_loop *loop = default_loop = &default_loop_struct;
752	#else
753	default_loop = 1;	1685	ev_default_loop_ptr = 1;
754	#endif	1686	#endif
755		1687
756	loop_init (EV_A_ methods);	1688	loop_init (EV_A_ flags);
757		1689
758	if (ev_method (EV_A))	1690	if (ev_backend (EV_A))
759	{	1691	{
760	ev_watcher_init (&sigev, sigcb);
761	ev_set_priority (&sigev, EV_MAXPRI);
762	siginit (EV_A);
763
764	#ifndef WIN32	1692	#ifndef _WIN32
765	ev_signal_init (&childev, childcb, SIGCHLD);	1693	ev_signal_init (&childev, childcb, SIGCHLD);
766	ev_set_priority (&childev, EV_MAXPRI);	1694	ev_set_priority (&childev, EV_MAXPRI);
767	ev_signal_start (EV_A_ &childev);	1695	ev_signal_start (EV_A_ &childev);
768	ev_unref (EV_A); /* child watcher should not keep loop alive */	1696	ev_unref (EV_A); /* child watcher should not keep loop alive */
769	#endif	1697	#endif
770	}	1698	}
771	else	1699	else
772	default_loop = 0;	1700	ev_default_loop_ptr = 0;
773	}	1701	}
774		1702
775	return default_loop;	1703	return ev_default_loop_ptr;
776	}	1704	}
777		1705
778	void	1706	void
779	ev_default_destroy (void)	1707	ev_default_destroy (void)
780	{	1708	{
781	#if EV_MULTIPLICITY	1709	#if EV_MULTIPLICITY
782	struct ev_loop *loop = default_loop;	1710	struct ev_loop *loop = ev_default_loop_ptr;
783	#endif	1711	#endif
784		1712
		1713	ev_default_loop_ptr = 0;
		1714
		1715	#ifndef _WIN32
785	ev_ref (EV_A); /* child watcher */	1716	ev_ref (EV_A); /* child watcher */
786	ev_signal_stop (EV_A_ &childev);	1717	ev_signal_stop (EV_A_ &childev);
787		1718	#endif
788	ev_ref (EV_A); /* signal watcher */
789	ev_io_stop (EV_A_ &sigev);
790
791	close (sigpipe [0]); sigpipe [0] = 0;
792	close (sigpipe [1]); sigpipe [1] = 0;
793		1719
794	loop_destroy (EV_A);	1720	loop_destroy (EV_A);
795	}	1721	}
796		1722
797	void	1723	void
798	ev_default_fork (void)	1724	ev_default_fork (void)
799	{	1725	{
800	#if EV_MULTIPLICITY	1726	#if EV_MULTIPLICITY
801	struct ev_loop *loop = default_loop;	1727	struct ev_loop *loop = ev_default_loop_ptr;
802	#endif	1728	#endif
803		1729
804	loop_fork (EV_A);	1730	postfork = 1; /* must be in line with ev_loop_fork */
805
806	ev_io_stop (EV_A_ &sigev);
807	close (sigpipe [0]);
808	close (sigpipe [1]);
809	pipe (sigpipe);
810
811	ev_ref (EV_A); /* signal watcher */
812	siginit (EV_A);
813	}	1731	}
814		1732
815	/*****************************************************************************/	1733	/*****************************************************************************/
816		1734
817	static void	1735	void
		1736	ev_invoke (EV_P_ void *w, int revents)
		1737	{
		1738	EV_CB_INVOKE ((W)w, revents);
		1739	}
		1740
		1741	inline_speed void
818	call_pending (EV_P)	1742	call_pending (EV_P)
819	{	1743	{
820	int pri;	1744	int pri;
821		1745
822	for (pri = NUMPRI; pri--; )	1746	for (pri = NUMPRI; pri--; )
823	while (pendingcnt [pri])	1747	while (pendingcnt [pri])
824	{	1748	{
825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1749	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
826		1750
827	if (p->w)	1751	if (expect_true (p->w))
828	{	1752	{
		1753	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1754
829	p->w->pending = 0;	1755	p->w->pending = 0;
830	p->w->cb (EV_A_ p->w, p->events);	1756	EV_CB_INVOKE (p->w, p->events);
		1757	EV_FREQUENT_CHECK;
831	}	1758	}
832	}	1759	}
833	}	1760	}
834		1761
835	static void	1762	#if EV_IDLE_ENABLE
		1763	inline_size void
836	timers_reify (EV_P)	1764	idle_reify (EV_P)
837	{	1765	{
838	while (timercnt && ((WT)timers [0])->at <= mn_now)	1766	if (expect_false (idleall))
839	{	1767	{
840	struct ev_timer *w = timers [0];	1768	int pri;
841		1769
842	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1770	for (pri = NUMPRI; pri--; )
843
844	/* first reschedule or stop timer */
845	if (w->repeat)
846	{	1771	{
847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1772	if (pendingcnt [pri])
848	((WT)w)->at = mn_now + w->repeat;	1773	break;
849	downheap ((WT *)timers, timercnt, 0);
850	}
851	else
852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
853		1774
854	event (EV_A_ (W)w, EV_TIMEOUT);	1775	if (idlecnt [pri])
855	}
856	}
857
858	static void
859	periodics_reify (EV_P)
860	{
861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
862	{
863	struct ev_periodic *w = periodics [0];
864
865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
866
867	/* first reschedule or stop timer */
868	if (w->interval)
869	{
870	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
872	downheap ((WT *)periodics, periodiccnt, 0);
873	}
874	else
875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
876
877	event (EV_A_ (W)w, EV_PERIODIC);
878	}
879	}
880
881	static void
882	periodics_reschedule (EV_P)
883	{
884	int i;
885
886	/* adjust periodics after time jump */
887	for (i = 0; i < periodiccnt; ++i)
888	{
889	struct ev_periodic *w = periodics [i];
890
891	if (w->interval)
892	{
893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
894
895	if (fabs (diff) >= 1e-4)
896	{	1776	{
897	ev_periodic_stop (EV_A_ w);	1777	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
898	ev_periodic_start (EV_A_ w);	1778	break;
899
900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
901	}	1779	}
902	}	1780	}
903	}	1781	}
904	}	1782	}
		1783	#endif
905		1784
906	inline int	1785	inline_size void
907	time_update_monotonic (EV_P)	1786	timers_reify (EV_P)
908	{	1787	{
909	mn_now = get_clock ();	1788	EV_FREQUENT_CHECK;
910		1789
911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1790	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
912	{
913	rt_now = rtmn_diff + mn_now;
914	return 0;
915	}	1791	{
916	else	1792	do
		1793	{
		1794	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1795
		1796	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1797
		1798	/* first reschedule or stop timer */
		1799	if (w->repeat)
		1800	{
		1801	ev_at (w) += w->repeat;
		1802	if (ev_at (w) < mn_now)
		1803	ev_at (w) = mn_now;
		1804
		1805	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1806
		1807	ANHE_at_cache (timers [HEAP0]);
		1808	downheap (timers, timercnt, HEAP0);
		1809	}
		1810	else
		1811	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1812
		1813	EV_FREQUENT_CHECK;
		1814	feed_reverse (EV_A_ (W)w);
		1815	}
		1816	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
		1817
		1818	feed_reverse_done (EV_A_ EV_TIMEOUT);
917	{	1819	}
918	now_floor = mn_now;	1820	}
919	rt_now = ev_time ();	1821
920	return 1;	1822	#if EV_PERIODIC_ENABLE
		1823	inline_size void
		1824	periodics_reify (EV_P)
		1825	{
		1826	EV_FREQUENT_CHECK;
		1827
		1828	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
921	}	1829	{
922	}	1830	int feed_count = 0;
923		1831
924	static void	1832	do
925	time_update (EV_P)	1833	{
		1834	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1835
		1836	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1837
		1838	/* first reschedule or stop timer */
		1839	if (w->reschedule_cb)
		1840	{
		1841	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1842
		1843	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1844
		1845	ANHE_at_cache (periodics [HEAP0]);
		1846	downheap (periodics, periodiccnt, HEAP0);
		1847	}
		1848	else if (w->interval)
		1849	{
		1850	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1851	/* if next trigger time is not sufficiently in the future, put it there */
		1852	/* this might happen because of floating point inexactness */
		1853	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1854	{
		1855	ev_at (w) += w->interval;
		1856
		1857	/* if interval is unreasonably low we might still have a time in the past */
		1858	/* so correct this. this will make the periodic very inexact, but the user */
		1859	/* has effectively asked to get triggered more often than possible */
		1860	if (ev_at (w) < ev_rt_now)
		1861	ev_at (w) = ev_rt_now;
		1862	}
		1863
		1864	ANHE_at_cache (periodics [HEAP0]);
		1865	downheap (periodics, periodiccnt, HEAP0);
		1866	}
		1867	else
		1868	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1869
		1870	EV_FREQUENT_CHECK;
		1871	feed_reverse (EV_A_ (W)w);
		1872	}
		1873	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
		1874
		1875	feed_reverse_done (EV_A_ EV_PERIODIC);
		1876	}
		1877	}
		1878
		1879	static void noinline
		1880	periodics_reschedule (EV_P)
		1881	{
		1882	int i;
		1883
		1884	/* adjust periodics after time jump */
		1885	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1886	{
		1887	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1888
		1889	if (w->reschedule_cb)
		1890	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1891	else if (w->interval)
		1892	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1893
		1894	ANHE_at_cache (periodics [i]);
		1895	}
		1896
		1897	reheap (periodics, periodiccnt);
		1898	}
		1899	#endif
		1900
		1901	static void noinline
		1902	timers_reschedule (EV_P_ ev_tstamp adjust)
		1903	{
		1904	int i;
		1905
		1906	for (i = 0; i < timercnt; ++i)
		1907	{
		1908	ANHE *he = timers + i + HEAP0;
		1909	ANHE_w (*he)->at += adjust;
		1910	ANHE_at_cache (*he);
		1911	}
		1912	}
		1913
		1914	inline_speed void
		1915	time_update (EV_P_ ev_tstamp max_block)
926	{	1916	{
927	int i;	1917	int i;
928		1918
929	#if EV_USE_MONOTONIC	1919	#if EV_USE_MONOTONIC
930	if (expect_true (have_monotonic))	1920	if (expect_true (have_monotonic))
931	{	1921	{
932	if (time_update_monotonic (EV_A))	1922	ev_tstamp odiff = rtmn_diff;
		1923
		1924	mn_now = get_clock ();
		1925
		1926	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1927	/* interpolate in the meantime */
		1928	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
933	{	1929	{
934	ev_tstamp odiff = rtmn_diff;	1930	ev_rt_now = rtmn_diff + mn_now;
		1931	return;
		1932	}
935		1933
		1934	now_floor = mn_now;
		1935	ev_rt_now = ev_time ();
		1936
936	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1937	/* loop a few times, before making important decisions.
		1938	* on the choice of "4": one iteration isn't enough,
		1939	* in case we get preempted during the calls to
		1940	* ev_time and get_clock. a second call is almost guaranteed
		1941	* to succeed in that case, though. and looping a few more times
		1942	* doesn't hurt either as we only do this on time-jumps or
		1943	* in the unlikely event of having been preempted here.
		1944	*/
		1945	for (i = 4; --i; )
937	{	1946	{
938	rtmn_diff = rt_now - mn_now;	1947	rtmn_diff = ev_rt_now - mn_now;
939		1948
940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1949	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
941	return; /* all is well */	1950	return; /* all is well */
942		1951
943	rt_now = ev_time ();	1952	ev_rt_now = ev_time ();
944	mn_now = get_clock ();	1953	mn_now = get_clock ();
945	now_floor = mn_now;	1954	now_floor = mn_now;
946	}	1955	}
947		1956
		1957	/* no timer adjustment, as the monotonic clock doesn't jump */
		1958	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1959	# if EV_PERIODIC_ENABLE
		1960	periodics_reschedule (EV_A);
		1961	# endif
		1962	}
		1963	else
		1964	#endif
		1965	{
		1966	ev_rt_now = ev_time ();
		1967
		1968	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1969	{
		1970	/* adjust timers. this is easy, as the offset is the same for all of them */
		1971	timers_reschedule (EV_A_ ev_rt_now - mn_now);
		1972	#if EV_PERIODIC_ENABLE
948	periodics_reschedule (EV_A);	1973	periodics_reschedule (EV_A);
949	/* no timer adjustment, as the monotonic clock doesn't jump */	1974	#endif
950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
951	}	1975	}
952	}
953	else
954	#endif
955	{
956	rt_now = ev_time ();
957		1976
958	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
959	{
960	periodics_reschedule (EV_A);
961
962	/* adjust timers. this is easy, as the offset is the same for all */
963	for (i = 0; i < timercnt; ++i)
964	((WT)timers [i])->at += rt_now - mn_now;
965	}
966
967	mn_now = rt_now;	1977	mn_now = ev_rt_now;
968	}	1978	}
969	}
970
971	void
972	ev_ref (EV_P)
973	{
974	++activecnt;
975	}
976
977	void
978	ev_unref (EV_P)
979	{
980	--activecnt;
981	}	1979	}
982		1980
983	static int loop_done;	1981	static int loop_done;
984		1982
985	void	1983	void
986	ev_loop (EV_P_ int flags)	1984	ev_loop (EV_P_ int flags)
987	{	1985	{
988	double block;	1986	loop_done = EVUNLOOP_CANCEL;
989	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1987
		1988	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
990		1989
991	do	1990	do
992	{	1991	{
		1992	#if EV_VERIFY >= 2
		1993	ev_loop_verify (EV_A);
		1994	#endif
		1995
		1996	#ifndef _WIN32
		1997	if (expect_false (curpid)) /* penalise the forking check even more */
		1998	if (expect_false (getpid () != curpid))
		1999	{
		2000	curpid = getpid ();
		2001	postfork = 1;
		2002	}
		2003	#endif
		2004
		2005	#if EV_FORK_ENABLE
		2006	/* we might have forked, so queue fork handlers */
		2007	if (expect_false (postfork))
		2008	if (forkcnt)
		2009	{
		2010	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		2011	call_pending (EV_A);
		2012	}
		2013	#endif
		2014
993	/* queue check watchers (and execute them) */	2015	/* queue prepare watchers (and execute them) */
994	if (expect_false (preparecnt))	2016	if (expect_false (preparecnt))
995	{	2017	{
996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2018	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
997	call_pending (EV_A);	2019	call_pending (EV_A);
998	}	2020	}
999		2021
		2022	/* we might have forked, so reify kernel state if necessary */
		2023	if (expect_false (postfork))
		2024	loop_fork (EV_A);
		2025
1000	/* update fd-related kernel structures */	2026	/* update fd-related kernel structures */
1001	fd_reify (EV_A);	2027	fd_reify (EV_A);
1002		2028
1003	/* calculate blocking time */	2029	/* calculate blocking time */
		2030	{
		2031	ev_tstamp waittime = 0.;
		2032	ev_tstamp sleeptime = 0.;
1004		2033
1005	/* we only need this for !monotonic clockor timers, but as we basically	2034	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1006	always have timers, we just calculate it always */
1007	#if EV_USE_MONOTONIC
1008	if (expect_true (have_monotonic))
1009	time_update_monotonic (EV_A);
1010	else
1011	#endif
1012	{	2035	{
1013	rt_now = ev_time ();	2036	/* update time to cancel out callback processing overhead */
1014	mn_now = rt_now;	2037	time_update (EV_A_ 1e100);
1015	}
1016		2038
1017	if (flags & EVLOOP_NONBLOCK || idlecnt)
1018	block = 0.;
1019	else
1020	{
1021	block = MAX_BLOCKTIME;	2039	waittime = MAX_BLOCKTIME;
1022		2040
1023	if (timercnt)	2041	if (timercnt)
1024	{	2042	{
1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	2043	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1026	if (block > to) block = to;	2044	if (waittime > to) waittime = to;
1027	}	2045	}
1028		2046
		2047	#if EV_PERIODIC_ENABLE
1029	if (periodiccnt)	2048	if (periodiccnt)
1030	{	2049	{
1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	2050	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1032	if (block > to) block = to;	2051	if (waittime > to) waittime = to;
1033	}	2052	}
		2053	#endif
1034		2054
1035	if (block < 0.) block = 0.;	2055	if (expect_false (waittime < timeout_blocktime))
		2056	waittime = timeout_blocktime;
		2057
		2058	sleeptime = waittime - backend_fudge;
		2059
		2060	if (expect_true (sleeptime > io_blocktime))
		2061	sleeptime = io_blocktime;
		2062
		2063	if (sleeptime)
		2064	{
		2065	ev_sleep (sleeptime);
		2066	waittime -= sleeptime;
		2067	}
1036	}	2068	}
1037		2069
1038	method_poll (EV_A_ block);	2070	++loop_count;
		2071	backend_poll (EV_A_ waittime);
1039		2072
1040	/* update rt_now, do magic */	2073	/* update ev_rt_now, do magic */
1041	time_update (EV_A);	2074	time_update (EV_A_ waittime + sleeptime);
		2075	}
1042		2076
1043	/* queue pending timers and reschedule them */	2077	/* queue pending timers and reschedule them */
1044	timers_reify (EV_A); /* relative timers called last */	2078	timers_reify (EV_A); /* relative timers called last */
		2079	#if EV_PERIODIC_ENABLE
1045	periodics_reify (EV_A); /* absolute timers called first */	2080	periodics_reify (EV_A); /* absolute timers called first */
		2081	#endif
1046		2082
		2083	#if EV_IDLE_ENABLE
1047	/* queue idle watchers unless io or timers are pending */	2084	/* queue idle watchers unless other events are pending */
1048	if (!pendingcnt)	2085	idle_reify (EV_A);
1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2086	#endif
1050		2087
1051	/* queue check watchers, to be executed first */	2088	/* queue check watchers, to be executed first */
1052	if (checkcnt)	2089	if (expect_false (checkcnt))
1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2090	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1054		2091
1055	call_pending (EV_A);	2092	call_pending (EV_A);
1056	}	2093	}
1057	while (activecnt && !loop_done);	2094	while (expect_true (
		2095	activecnt
		2096	&& !loop_done
		2097	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2098	));
1058		2099
1059	if (loop_done != 2)	2100	if (loop_done == EVUNLOOP_ONE)
1060	loop_done = 0;	2101	loop_done = EVUNLOOP_CANCEL;
1061	}	2102	}
1062		2103
1063	void	2104	void
1064	ev_unloop (EV_P_ int how)	2105	ev_unloop (EV_P_ int how)
1065	{	2106	{
1066	loop_done = how;	2107	loop_done = how;
1067	}	2108	}
1068		2109
		2110	void
		2111	ev_ref (EV_P)
		2112	{
		2113	++activecnt;
		2114	}
		2115
		2116	void
		2117	ev_unref (EV_P)
		2118	{
		2119	--activecnt;
		2120	}
		2121
		2122	void
		2123	ev_now_update (EV_P)
		2124	{
		2125	time_update (EV_A_ 1e100);
		2126	}
		2127
		2128	void
		2129	ev_suspend (EV_P)
		2130	{
		2131	ev_now_update (EV_A);
		2132	}
		2133
		2134	void
		2135	ev_resume (EV_P)
		2136	{
		2137	ev_tstamp mn_prev = mn_now;
		2138
		2139	ev_now_update (EV_A);
		2140	timers_reschedule (EV_A_ mn_now - mn_prev);
		2141	#if EV_PERIODIC_ENABLE
		2142	periodics_reschedule (EV_A);
		2143	#endif
		2144	}
		2145
1069	/*****************************************************************************/	2146	/*****************************************************************************/
1070		2147
1071	inline void	2148	inline_size void
1072	wlist_add (WL *head, WL elem)	2149	wlist_add (WL *head, WL elem)
1073	{	2150	{
1074	elem->next = *head;	2151	elem->next = *head;
1075	*head = elem;	2152	*head = elem;
1076	}	2153	}
1077		2154
1078	inline void	2155	inline_size void
1079	wlist_del (WL *head, WL elem)	2156	wlist_del (WL *head, WL elem)
1080	{	2157	{
1081	while (*head)	2158	while (*head)
1082	{	2159	{
1083	if (*head == elem)	2160	if (*head == elem)
…		…
1088		2165
1089	head = &(*head)->next;	2166	head = &(*head)->next;
1090	}	2167	}
1091	}	2168	}
1092		2169
1093	inline void	2170	inline_speed void
1094	ev_clear_pending (EV_P_ W w)	2171	clear_pending (EV_P_ W w)
1095	{	2172	{
1096	if (w->pending)	2173	if (w->pending)
1097	{	2174	{
1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2175	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1099	w->pending = 0;	2176	w->pending = 0;
1100	}	2177	}
1101	}	2178	}
1102		2179
		2180	int
		2181	ev_clear_pending (EV_P_ void *w)
		2182	{
		2183	W w_ = (W)w;
		2184	int pending = w_->pending;
		2185
		2186	if (expect_true (pending))
		2187	{
		2188	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2189	w_->pending = 0;
		2190	p->w = 0;
		2191	return p->events;
		2192	}
		2193	else
		2194	return 0;
		2195	}
		2196
1103	inline void	2197	inline_size void
		2198	pri_adjust (EV_P_ W w)
		2199	{
		2200	int pri = w->priority;
		2201	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2202	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2203	w->priority = pri;
		2204	}
		2205
		2206	inline_speed void
1104	ev_start (EV_P_ W w, int active)	2207	ev_start (EV_P_ W w, int active)
1105	{	2208	{
1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2209	pri_adjust (EV_A_ w);
1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1108
1109	w->active = active;	2210	w->active = active;
1110	ev_ref (EV_A);	2211	ev_ref (EV_A);
1111	}	2212	}
1112		2213
1113	inline void	2214	inline_size void
1114	ev_stop (EV_P_ W w)	2215	ev_stop (EV_P_ W w)
1115	{	2216	{
1116	ev_unref (EV_A);	2217	ev_unref (EV_A);
1117	w->active = 0;	2218	w->active = 0;
1118	}	2219	}
1119		2220
1120	/*****************************************************************************/	2221	/*****************************************************************************/
1121		2222
1122	void	2223	void noinline
1123	ev_io_start (EV_P_ struct ev_io *w)	2224	ev_io_start (EV_P_ ev_io *w)
1124	{	2225	{
1125	int fd = w->fd;	2226	int fd = w->fd;
1126		2227
1127	if (ev_is_active (w))	2228	if (expect_false (ev_is_active (w)))
1128	return;	2229	return;
1129		2230
1130	assert (("ev_io_start called with negative fd", fd >= 0));	2231	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2232	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
		2233
		2234	EV_FREQUENT_CHECK;
1131		2235
1132	ev_start (EV_A_ (W)w, 1);	2236	ev_start (EV_A_ (W)w, 1);
1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	2237	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2238	wlist_add (&anfds[fd].head, (WL)w);
1135		2239
1136	fd_change (EV_A_ fd);	2240	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1137	}	2241	w->events &= ~EV__IOFDSET;
1138		2242
1139	void	2243	EV_FREQUENT_CHECK;
		2244	}
		2245
		2246	void noinline
1140	ev_io_stop (EV_P_ struct ev_io *w)	2247	ev_io_stop (EV_P_ ev_io *w)
1141	{	2248	{
1142	ev_clear_pending (EV_A_ (W)w);	2249	clear_pending (EV_A_ (W)w);
1143	if (!ev_is_active (w))	2250	if (expect_false (!ev_is_active (w)))
1144	return;	2251	return;
1145		2252
		2253	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2254
		2255	EV_FREQUENT_CHECK;
		2256
1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2257	wlist_del (&anfds[w->fd].head, (WL)w);
1147	ev_stop (EV_A_ (W)w);	2258	ev_stop (EV_A_ (W)w);
1148		2259
1149	fd_change (EV_A_ w->fd);	2260	fd_change (EV_A_ w->fd, 1);
1150	}
1151		2261
1152	void	2262	EV_FREQUENT_CHECK;
		2263	}
		2264
		2265	void noinline
1153	ev_timer_start (EV_P_ struct ev_timer *w)	2266	ev_timer_start (EV_P_ ev_timer *w)
1154	{	2267	{
1155	if (ev_is_active (w))	2268	if (expect_false (ev_is_active (w)))
1156	return;	2269	return;
1157		2270
1158	((WT)w)->at += mn_now;	2271	ev_at (w) += mn_now;
1159		2272
1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2273	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1161		2274
		2275	EV_FREQUENT_CHECK;
		2276
		2277	++timercnt;
1162	ev_start (EV_A_ (W)w, ++timercnt);	2278	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1163	array_needsize (timers, timermax, timercnt, );	2279	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1164	timers [timercnt - 1] = w;	2280	ANHE_w (timers [ev_active (w)]) = (WT)w;
1165	upheap ((WT *)timers, timercnt - 1);	2281	ANHE_at_cache (timers [ev_active (w)]);
		2282	upheap (timers, ev_active (w));
1166		2283
		2284	EV_FREQUENT_CHECK;
		2285
1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2286	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1168	}	2287	}
1169		2288
1170	void	2289	void noinline
1171	ev_timer_stop (EV_P_ struct ev_timer *w)	2290	ev_timer_stop (EV_P_ ev_timer *w)
1172	{	2291	{
1173	ev_clear_pending (EV_A_ (W)w);	2292	clear_pending (EV_A_ (W)w);
1174	if (!ev_is_active (w))	2293	if (expect_false (!ev_is_active (w)))
1175	return;	2294	return;
1176		2295
		2296	EV_FREQUENT_CHECK;
		2297
		2298	{
		2299	int active = ev_active (w);
		2300
1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2301	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1178		2302
1179	if (((W)w)->active < timercnt--)	2303	--timercnt;
		2304
		2305	if (expect_true (active < timercnt + HEAP0))
1180	{	2306	{
1181	timers [((W)w)->active - 1] = timers [timercnt];	2307	timers [active] = timers [timercnt + HEAP0];
1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2308	adjustheap (timers, timercnt, active);
1183	}	2309	}
		2310	}
1184		2311
1185	((WT)w)->at = w->repeat;	2312	EV_FREQUENT_CHECK;
		2313
		2314	ev_at (w) -= mn_now;
1186		2315
1187	ev_stop (EV_A_ (W)w);	2316	ev_stop (EV_A_ (W)w);
1188	}	2317	}
1189		2318
1190	void	2319	void noinline
1191	ev_timer_again (EV_P_ struct ev_timer *w)	2320	ev_timer_again (EV_P_ ev_timer *w)
1192	{	2321	{
		2322	EV_FREQUENT_CHECK;
		2323
1193	if (ev_is_active (w))	2324	if (ev_is_active (w))
1194	{	2325	{
1195	if (w->repeat)	2326	if (w->repeat)
1196	{	2327	{
1197	((WT)w)->at = mn_now + w->repeat;	2328	ev_at (w) = mn_now + w->repeat;
1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2329	ANHE_at_cache (timers [ev_active (w)]);
		2330	adjustheap (timers, timercnt, ev_active (w));
1199	}	2331	}
1200	else	2332	else
1201	ev_timer_stop (EV_A_ w);	2333	ev_timer_stop (EV_A_ w);
1202	}	2334	}
1203	else if (w->repeat)	2335	else if (w->repeat)
		2336	{
		2337	ev_at (w) = w->repeat;
1204	ev_timer_start (EV_A_ w);	2338	ev_timer_start (EV_A_ w);
1205	}	2339	}
1206		2340
1207	void	2341	EV_FREQUENT_CHECK;
		2342	}
		2343
		2344	#if EV_PERIODIC_ENABLE
		2345	void noinline
1208	ev_periodic_start (EV_P_ struct ev_periodic *w)	2346	ev_periodic_start (EV_P_ ev_periodic *w)
1209	{	2347	{
1210	if (ev_is_active (w))	2348	if (expect_false (ev_is_active (w)))
1211	return;	2349	return;
1212		2350
		2351	if (w->reschedule_cb)
		2352	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2353	else if (w->interval)
		2354	{
1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2355	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1214
1215	/* this formula differs from the one in periodic_reify because we do not always round up */	2356	/* this formula differs from the one in periodic_reify because we do not always round up */
1216	if (w->interval)
1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	2357	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2358	}
		2359	else
		2360	ev_at (w) = w->offset;
1218		2361
		2362	EV_FREQUENT_CHECK;
		2363
		2364	++periodiccnt;
1219	ev_start (EV_A_ (W)w, ++periodiccnt);	2365	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1220	array_needsize (periodics, periodicmax, periodiccnt, );	2366	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1221	periodics [periodiccnt - 1] = w;	2367	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1222	upheap ((WT *)periodics, periodiccnt - 1);	2368	ANHE_at_cache (periodics [ev_active (w)]);
		2369	upheap (periodics, ev_active (w));
1223		2370
		2371	EV_FREQUENT_CHECK;
		2372
1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2373	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1225	}	2374	}
1226		2375
1227	void	2376	void noinline
1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2377	ev_periodic_stop (EV_P_ ev_periodic *w)
1229	{	2378	{
1230	ev_clear_pending (EV_A_ (W)w);	2379	clear_pending (EV_A_ (W)w);
1231	if (!ev_is_active (w))	2380	if (expect_false (!ev_is_active (w)))
1232	return;	2381	return;
1233		2382
		2383	EV_FREQUENT_CHECK;
		2384
		2385	{
		2386	int active = ev_active (w);
		2387
1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2388	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1235		2389
1236	if (((W)w)->active < periodiccnt--)	2390	--periodiccnt;
		2391
		2392	if (expect_true (active < periodiccnt + HEAP0))
1237	{	2393	{
1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2394	periodics [active] = periodics [periodiccnt + HEAP0];
1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2395	adjustheap (periodics, periodiccnt, active);
1240	}	2396	}
		2397	}
		2398
		2399	EV_FREQUENT_CHECK;
1241		2400
1242	ev_stop (EV_A_ (W)w);	2401	ev_stop (EV_A_ (W)w);
1243	}	2402	}
1244		2403
1245	void	2404	void noinline
1246	ev_idle_start (EV_P_ struct ev_idle *w)	2405	ev_periodic_again (EV_P_ ev_periodic *w)
1247	{	2406	{
1248	if (ev_is_active (w))	2407	/* TODO: use adjustheap and recalculation */
1249	return;
1250
1251	ev_start (EV_A_ (W)w, ++idlecnt);
1252	array_needsize (idles, idlemax, idlecnt, );
1253	idles [idlecnt - 1] = w;
1254	}
1255
1256	void
1257	ev_idle_stop (EV_P_ struct ev_idle *w)
1258	{
1259	ev_clear_pending (EV_A_ (W)w);
1260	if (ev_is_active (w))
1261	return;
1262
1263	idles [((W)w)->active - 1] = idles [--idlecnt];
1264	ev_stop (EV_A_ (W)w);	2408	ev_periodic_stop (EV_A_ w);
		2409	ev_periodic_start (EV_A_ w);
1265	}	2410	}
1266		2411	#endif
1267	void
1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
1269	{
1270	if (ev_is_active (w))
1271	return;
1272
1273	ev_start (EV_A_ (W)w, ++preparecnt);
1274	array_needsize (prepares, preparemax, preparecnt, );
1275	prepares [preparecnt - 1] = w;
1276	}
1277
1278	void
1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1280	{
1281	ev_clear_pending (EV_A_ (W)w);
1282	if (ev_is_active (w))
1283	return;
1284
1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1286	ev_stop (EV_A_ (W)w);
1287	}
1288
1289	void
1290	ev_check_start (EV_P_ struct ev_check *w)
1291	{
1292	if (ev_is_active (w))
1293	return;
1294
1295	ev_start (EV_A_ (W)w, ++checkcnt);
1296	array_needsize (checks, checkmax, checkcnt, );
1297	checks [checkcnt - 1] = w;
1298	}
1299
1300	void
1301	ev_check_stop (EV_P_ struct ev_check *w)
1302	{
1303	ev_clear_pending (EV_A_ (W)w);
1304	if (ev_is_active (w))
1305	return;
1306
1307	checks [((W)w)->active - 1] = checks [--checkcnt];
1308	ev_stop (EV_A_ (W)w);
1309	}
1310		2412
1311	#ifndef SA_RESTART	2413	#ifndef SA_RESTART
1312	# define SA_RESTART 0	2414	# define SA_RESTART 0
1313	#endif	2415	#endif
1314		2416
1315	void	2417	void noinline
1316	ev_signal_start (EV_P_ struct ev_signal *w)	2418	ev_signal_start (EV_P_ ev_signal *w)
1317	{	2419	{
1318	#if EV_MULTIPLICITY	2420	#if EV_MULTIPLICITY
1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2421	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1320	#endif	2422	#endif
1321	if (ev_is_active (w))	2423	if (expect_false (ev_is_active (w)))
1322	return;	2424	return;
1323		2425
1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2426	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
		2427
		2428	evpipe_init (EV_A);
		2429
		2430	EV_FREQUENT_CHECK;
		2431
		2432	{
		2433	#ifndef _WIN32
		2434	sigset_t full, prev;
		2435	sigfillset (&full);
		2436	sigprocmask (SIG_SETMASK, &full, &prev);
		2437	#endif
		2438
		2439	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
		2440
		2441	#ifndef _WIN32
		2442	sigprocmask (SIG_SETMASK, &prev, 0);
		2443	#endif
		2444	}
1325		2445
1326	ev_start (EV_A_ (W)w, 1);	2446	ev_start (EV_A_ (W)w, 1);
1327	array_needsize (signals, signalmax, w->signum, signals_init);
1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2447	wlist_add (&signals [w->signum - 1].head, (WL)w);
1329		2448
1330	if (!((WL)w)->next)	2449	if (!((WL)w)->next)
1331	{	2450	{
1332	#if WIN32	2451	#if _WIN32
1333	signal (w->signum, sighandler);	2452	signal (w->signum, ev_sighandler);
1334	#else	2453	#else
1335	struct sigaction sa;	2454	struct sigaction sa;
1336	sa.sa_handler = sighandler;	2455	sa.sa_handler = ev_sighandler;
1337	sigfillset (&sa.sa_mask);	2456	sigfillset (&sa.sa_mask);
1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2457	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1339	sigaction (w->signum, &sa, 0);	2458	sigaction (w->signum, &sa, 0);
1340	#endif	2459	#endif
1341	}	2460	}
1342	}
1343		2461
1344	void	2462	EV_FREQUENT_CHECK;
		2463	}
		2464
		2465	void noinline
1345	ev_signal_stop (EV_P_ struct ev_signal *w)	2466	ev_signal_stop (EV_P_ ev_signal *w)
1346	{	2467	{
1347	ev_clear_pending (EV_A_ (W)w);	2468	clear_pending (EV_A_ (W)w);
1348	if (!ev_is_active (w))	2469	if (expect_false (!ev_is_active (w)))
1349	return;	2470	return;
1350		2471
		2472	EV_FREQUENT_CHECK;
		2473
1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2474	wlist_del (&signals [w->signum - 1].head, (WL)w);
1352	ev_stop (EV_A_ (W)w);	2475	ev_stop (EV_A_ (W)w);
1353		2476
1354	if (!signals [w->signum - 1].head)	2477	if (!signals [w->signum - 1].head)
1355	signal (w->signum, SIG_DFL);	2478	signal (w->signum, SIG_DFL);
1356	}
1357		2479
		2480	EV_FREQUENT_CHECK;
		2481	}
		2482
1358	void	2483	void
1359	ev_child_start (EV_P_ struct ev_child *w)	2484	ev_child_start (EV_P_ ev_child *w)
1360	{	2485	{
1361	#if EV_MULTIPLICITY	2486	#if EV_MULTIPLICITY
1362	assert (("child watchers are only supported in the default loop", loop == default_loop));	2487	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1363	#endif	2488	#endif
1364	if (ev_is_active (w))	2489	if (expect_false (ev_is_active (w)))
1365	return;	2490	return;
1366		2491
		2492	EV_FREQUENT_CHECK;
		2493
1367	ev_start (EV_A_ (W)w, 1);	2494	ev_start (EV_A_ (W)w, 1);
1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2495	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1369	}
1370		2496
		2497	EV_FREQUENT_CHECK;
		2498	}
		2499
1371	void	2500	void
1372	ev_child_stop (EV_P_ struct ev_child *w)	2501	ev_child_stop (EV_P_ ev_child *w)
1373	{	2502	{
1374	ev_clear_pending (EV_A_ (W)w);	2503	clear_pending (EV_A_ (W)w);
1375	if (ev_is_active (w))	2504	if (expect_false (!ev_is_active (w)))
1376	return;	2505	return;
1377		2506
		2507	EV_FREQUENT_CHECK;
		2508
1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2509	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1379	ev_stop (EV_A_ (W)w);	2510	ev_stop (EV_A_ (W)w);
		2511
		2512	EV_FREQUENT_CHECK;
1380	}	2513	}
		2514
		2515	#if EV_STAT_ENABLE
		2516
		2517	# ifdef _WIN32
		2518	# undef lstat
		2519	# define lstat(a,b) _stati64 (a,b)
		2520	# endif
		2521
		2522	#define DEF_STAT_INTERVAL 5.0074891
		2523	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
		2524	#define MIN_STAT_INTERVAL 0.1074891
		2525
		2526	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2527
		2528	#if EV_USE_INOTIFY
		2529	# define EV_INOTIFY_BUFSIZE 8192
		2530
		2531	static void noinline
		2532	infy_add (EV_P_ ev_stat *w)
		2533	{
		2534	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);
		2535
		2536	if (w->wd < 0)
		2537	{
		2538	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2539	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2540
		2541	/* monitor some parent directory for speedup hints */
		2542	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		2543	/* but an efficiency issue only */
		2544	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2545	{
		2546	char path [4096];
		2547	strcpy (path, w->path);
		2548
		2549	do
		2550	{
		2551	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2552	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2553
		2554	char *pend = strrchr (path, '/');
		2555
		2556	if (!pend || pend == path)
		2557	break;
		2558
		2559	*pend = 0;
		2560	w->wd = inotify_add_watch (fs_fd, path, mask);
		2561	}
		2562	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2563	}
		2564	}
		2565
		2566	if (w->wd >= 0)
		2567	{
		2568	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2569
		2570	/* now local changes will be tracked by inotify, but remote changes won't */
		2571	/* unless the filesystem it known to be local, we therefore still poll */
		2572	/* also do poll on <2.6.25, but with normal frequency */
		2573	struct statfs sfs;
		2574
		2575	if (fs_2625 && !statfs (w->path, &sfs))
		2576	if (sfs.f_type == 0x1373 /* devfs */
		2577	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2578	|| sfs.f_type == 0x3153464a /* jfs */
		2579	|| sfs.f_type == 0x52654973 /* reiser3 */
		2580	|| sfs.f_type == 0x01021994 /* tempfs */
		2581	|| sfs.f_type == 0x58465342 /* xfs */)
		2582	return;
		2583
		2584	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2585	ev_timer_again (EV_A_ &w->timer);
		2586	}
		2587	}
		2588
		2589	static void noinline
		2590	infy_del (EV_P_ ev_stat *w)
		2591	{
		2592	int slot;
		2593	int wd = w->wd;
		2594
		2595	if (wd < 0)
		2596	return;
		2597
		2598	w->wd = -2;
		2599	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2600	wlist_del (&fs_hash [slot].head, (WL)w);
		2601
		2602	/* remove this watcher, if others are watching it, they will rearm */
		2603	inotify_rm_watch (fs_fd, wd);
		2604	}
		2605
		2606	static void noinline
		2607	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2608	{
		2609	if (slot < 0)
		2610	/* overflow, need to check for all hash slots */
		2611	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2612	infy_wd (EV_A_ slot, wd, ev);
		2613	else
		2614	{
		2615	WL w_;
		2616
		2617	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2618	{
		2619	ev_stat *w = (ev_stat *)w_;
		2620	w_ = w_->next; /* lets us remove this watcher and all before it */
		2621
		2622	if (w->wd == wd || wd == -1)
		2623	{
		2624	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2625	{
		2626	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2627	w->wd = -1;
		2628	infy_add (EV_A_ w); /* re-add, no matter what */
		2629	}
		2630
		2631	stat_timer_cb (EV_A_ &w->timer, 0);
		2632	}
		2633	}
		2634	}
		2635	}
		2636
		2637	static void
		2638	infy_cb (EV_P_ ev_io *w, int revents)
		2639	{
		2640	char buf [EV_INOTIFY_BUFSIZE];
		2641	struct inotify_event *ev = (struct inotify_event *)buf;
		2642	int ofs;
		2643	int len = read (fs_fd, buf, sizeof (buf));
		2644
		2645	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2646	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2647	}
		2648
		2649	inline_size void
		2650	check_2625 (EV_P)
		2651	{
		2652	/* kernels < 2.6.25 are borked
		2653	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2654	*/
		2655	struct utsname buf;
		2656	int major, minor, micro;
		2657
		2658	if (uname (&buf))
		2659	return;
		2660
		2661	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2662	return;
		2663
		2664	if (major < 2
		2665	|| (major == 2 && minor < 6)
		2666	|| (major == 2 && minor == 6 && micro < 25))
		2667	return;
		2668
		2669	fs_2625 = 1;
		2670	}
		2671
		2672	inline_size void
		2673	infy_init (EV_P)
		2674	{
		2675	if (fs_fd != -2)
		2676	return;
		2677
		2678	fs_fd = -1;
		2679
		2680	check_2625 (EV_A);
		2681
		2682	fs_fd = inotify_init ();
		2683
		2684	if (fs_fd >= 0)
		2685	{
		2686	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2687	ev_set_priority (&fs_w, EV_MAXPRI);
		2688	ev_io_start (EV_A_ &fs_w);
		2689	}
		2690	}
		2691
		2692	inline_size void
		2693	infy_fork (EV_P)
		2694	{
		2695	int slot;
		2696
		2697	if (fs_fd < 0)
		2698	return;
		2699
		2700	close (fs_fd);
		2701	fs_fd = inotify_init ();
		2702
		2703	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2704	{
		2705	WL w_ = fs_hash [slot].head;
		2706	fs_hash [slot].head = 0;
		2707
		2708	while (w_)
		2709	{
		2710	ev_stat *w = (ev_stat *)w_;
		2711	w_ = w_->next; /* lets us add this watcher */
		2712
		2713	w->wd = -1;
		2714
		2715	if (fs_fd >= 0)
		2716	infy_add (EV_A_ w); /* re-add, no matter what */
		2717	else
		2718	ev_timer_again (EV_A_ &w->timer);
		2719	}
		2720	}
		2721	}
		2722
		2723	#endif
		2724
		2725	#ifdef _WIN32
		2726	# define EV_LSTAT(p,b) _stati64 (p, b)
		2727	#else
		2728	# define EV_LSTAT(p,b) lstat (p, b)
		2729	#endif
		2730
		2731	void
		2732	ev_stat_stat (EV_P_ ev_stat *w)
		2733	{
		2734	if (lstat (w->path, &w->attr) < 0)
		2735	w->attr.st_nlink = 0;
		2736	else if (!w->attr.st_nlink)
		2737	w->attr.st_nlink = 1;
		2738	}
		2739
		2740	static void noinline
		2741	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2742	{
		2743	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2744
		2745	/* we copy this here each the time so that */
		2746	/* prev has the old value when the callback gets invoked */
		2747	w->prev = w->attr;
		2748	ev_stat_stat (EV_A_ w);
		2749
		2750	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2751	if (
		2752	w->prev.st_dev != w->attr.st_dev
		2753	|| w->prev.st_ino != w->attr.st_ino
		2754	|| w->prev.st_mode != w->attr.st_mode
		2755	|| w->prev.st_nlink != w->attr.st_nlink
		2756	|| w->prev.st_uid != w->attr.st_uid
		2757	|| w->prev.st_gid != w->attr.st_gid
		2758	|| w->prev.st_rdev != w->attr.st_rdev
		2759	|| w->prev.st_size != w->attr.st_size
		2760	|| w->prev.st_atime != w->attr.st_atime
		2761	|| w->prev.st_mtime != w->attr.st_mtime
		2762	|| w->prev.st_ctime != w->attr.st_ctime
		2763	) {
		2764	#if EV_USE_INOTIFY
		2765	if (fs_fd >= 0)
		2766	{
		2767	infy_del (EV_A_ w);
		2768	infy_add (EV_A_ w);
		2769	ev_stat_stat (EV_A_ w); /* avoid race... */
		2770	}
		2771	#endif
		2772
		2773	ev_feed_event (EV_A_ w, EV_STAT);
		2774	}
		2775	}
		2776
		2777	void
		2778	ev_stat_start (EV_P_ ev_stat *w)
		2779	{
		2780	if (expect_false (ev_is_active (w)))
		2781	return;
		2782
		2783	ev_stat_stat (EV_A_ w);
		2784
		2785	if (w->interval < MIN_STAT_INTERVAL && w->interval)
		2786	w->interval = MIN_STAT_INTERVAL;
		2787
		2788	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
		2789	ev_set_priority (&w->timer, ev_priority (w));
		2790
		2791	#if EV_USE_INOTIFY
		2792	infy_init (EV_A);
		2793
		2794	if (fs_fd >= 0)
		2795	infy_add (EV_A_ w);
		2796	else
		2797	#endif
		2798	ev_timer_again (EV_A_ &w->timer);
		2799
		2800	ev_start (EV_A_ (W)w, 1);
		2801
		2802	EV_FREQUENT_CHECK;
		2803	}
		2804
		2805	void
		2806	ev_stat_stop (EV_P_ ev_stat *w)
		2807	{
		2808	clear_pending (EV_A_ (W)w);
		2809	if (expect_false (!ev_is_active (w)))
		2810	return;
		2811
		2812	EV_FREQUENT_CHECK;
		2813
		2814	#if EV_USE_INOTIFY
		2815	infy_del (EV_A_ w);
		2816	#endif
		2817	ev_timer_stop (EV_A_ &w->timer);
		2818
		2819	ev_stop (EV_A_ (W)w);
		2820
		2821	EV_FREQUENT_CHECK;
		2822	}
		2823	#endif
		2824
		2825	#if EV_IDLE_ENABLE
		2826	void
		2827	ev_idle_start (EV_P_ ev_idle *w)
		2828	{
		2829	if (expect_false (ev_is_active (w)))
		2830	return;
		2831
		2832	pri_adjust (EV_A_ (W)w);
		2833
		2834	EV_FREQUENT_CHECK;
		2835
		2836	{
		2837	int active = ++idlecnt [ABSPRI (w)];
		2838
		2839	++idleall;
		2840	ev_start (EV_A_ (W)w, active);
		2841
		2842	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2843	idles [ABSPRI (w)][active - 1] = w;
		2844	}
		2845
		2846	EV_FREQUENT_CHECK;
		2847	}
		2848
		2849	void
		2850	ev_idle_stop (EV_P_ ev_idle *w)
		2851	{
		2852	clear_pending (EV_A_ (W)w);
		2853	if (expect_false (!ev_is_active (w)))
		2854	return;
		2855
		2856	EV_FREQUENT_CHECK;
		2857
		2858	{
		2859	int active = ev_active (w);
		2860
		2861	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2862	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2863
		2864	ev_stop (EV_A_ (W)w);
		2865	--idleall;
		2866	}
		2867
		2868	EV_FREQUENT_CHECK;
		2869	}
		2870	#endif
		2871
		2872	void
		2873	ev_prepare_start (EV_P_ ev_prepare *w)
		2874	{
		2875	if (expect_false (ev_is_active (w)))
		2876	return;
		2877
		2878	EV_FREQUENT_CHECK;
		2879
		2880	ev_start (EV_A_ (W)w, ++preparecnt);
		2881	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2882	prepares [preparecnt - 1] = w;
		2883
		2884	EV_FREQUENT_CHECK;
		2885	}
		2886
		2887	void
		2888	ev_prepare_stop (EV_P_ ev_prepare *w)
		2889	{
		2890	clear_pending (EV_A_ (W)w);
		2891	if (expect_false (!ev_is_active (w)))
		2892	return;
		2893
		2894	EV_FREQUENT_CHECK;
		2895
		2896	{
		2897	int active = ev_active (w);
		2898
		2899	prepares [active - 1] = prepares [--preparecnt];
		2900	ev_active (prepares [active - 1]) = active;
		2901	}
		2902
		2903	ev_stop (EV_A_ (W)w);
		2904
		2905	EV_FREQUENT_CHECK;
		2906	}
		2907
		2908	void
		2909	ev_check_start (EV_P_ ev_check *w)
		2910	{
		2911	if (expect_false (ev_is_active (w)))
		2912	return;
		2913
		2914	EV_FREQUENT_CHECK;
		2915
		2916	ev_start (EV_A_ (W)w, ++checkcnt);
		2917	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2918	checks [checkcnt - 1] = w;
		2919
		2920	EV_FREQUENT_CHECK;
		2921	}
		2922
		2923	void
		2924	ev_check_stop (EV_P_ ev_check *w)
		2925	{
		2926	clear_pending (EV_A_ (W)w);
		2927	if (expect_false (!ev_is_active (w)))
		2928	return;
		2929
		2930	EV_FREQUENT_CHECK;
		2931
		2932	{
		2933	int active = ev_active (w);
		2934
		2935	checks [active - 1] = checks [--checkcnt];
		2936	ev_active (checks [active - 1]) = active;
		2937	}
		2938
		2939	ev_stop (EV_A_ (W)w);
		2940
		2941	EV_FREQUENT_CHECK;
		2942	}
		2943
		2944	#if EV_EMBED_ENABLE
		2945	void noinline
		2946	ev_embed_sweep (EV_P_ ev_embed *w)
		2947	{
		2948	ev_loop (w->other, EVLOOP_NONBLOCK);
		2949	}
		2950
		2951	static void
		2952	embed_io_cb (EV_P_ ev_io *io, int revents)
		2953	{
		2954	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2955
		2956	if (ev_cb (w))
		2957	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2958	else
		2959	ev_loop (w->other, EVLOOP_NONBLOCK);
		2960	}
		2961
		2962	static void
		2963	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2964	{
		2965	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2966
		2967	{
		2968	struct ev_loop *loop = w->other;
		2969
		2970	while (fdchangecnt)
		2971	{
		2972	fd_reify (EV_A);
		2973	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2974	}
		2975	}
		2976	}
		2977
		2978	static void
		2979	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		2980	{
		2981	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		2982
		2983	ev_embed_stop (EV_A_ w);
		2984
		2985	{
		2986	struct ev_loop *loop = w->other;
		2987
		2988	ev_loop_fork (EV_A);
		2989	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2990	}
		2991
		2992	ev_embed_start (EV_A_ w);
		2993	}
		2994
		2995	#if 0
		2996	static void
		2997	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2998	{
		2999	ev_idle_stop (EV_A_ idle);
		3000	}
		3001	#endif
		3002
		3003	void
		3004	ev_embed_start (EV_P_ ev_embed *w)
		3005	{
		3006	if (expect_false (ev_is_active (w)))
		3007	return;
		3008
		3009	{
		3010	struct ev_loop *loop = w->other;
		3011	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		3012	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		3013	}
		3014
		3015	EV_FREQUENT_CHECK;
		3016
		3017	ev_set_priority (&w->io, ev_priority (w));
		3018	ev_io_start (EV_A_ &w->io);
		3019
		3020	ev_prepare_init (&w->prepare, embed_prepare_cb);
		3021	ev_set_priority (&w->prepare, EV_MINPRI);
		3022	ev_prepare_start (EV_A_ &w->prepare);
		3023
		3024	ev_fork_init (&w->fork, embed_fork_cb);
		3025	ev_fork_start (EV_A_ &w->fork);
		3026
		3027	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		3028
		3029	ev_start (EV_A_ (W)w, 1);
		3030
		3031	EV_FREQUENT_CHECK;
		3032	}
		3033
		3034	void
		3035	ev_embed_stop (EV_P_ ev_embed *w)
		3036	{
		3037	clear_pending (EV_A_ (W)w);
		3038	if (expect_false (!ev_is_active (w)))
		3039	return;
		3040
		3041	EV_FREQUENT_CHECK;
		3042
		3043	ev_io_stop (EV_A_ &w->io);
		3044	ev_prepare_stop (EV_A_ &w->prepare);
		3045	ev_fork_stop (EV_A_ &w->fork);
		3046
		3047	EV_FREQUENT_CHECK;
		3048	}
		3049	#endif
		3050
		3051	#if EV_FORK_ENABLE
		3052	void
		3053	ev_fork_start (EV_P_ ev_fork *w)
		3054	{
		3055	if (expect_false (ev_is_active (w)))
		3056	return;
		3057
		3058	EV_FREQUENT_CHECK;
		3059
		3060	ev_start (EV_A_ (W)w, ++forkcnt);
		3061	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		3062	forks [forkcnt - 1] = w;
		3063
		3064	EV_FREQUENT_CHECK;
		3065	}
		3066
		3067	void
		3068	ev_fork_stop (EV_P_ ev_fork *w)
		3069	{
		3070	clear_pending (EV_A_ (W)w);
		3071	if (expect_false (!ev_is_active (w)))
		3072	return;
		3073
		3074	EV_FREQUENT_CHECK;
		3075
		3076	{
		3077	int active = ev_active (w);
		3078
		3079	forks [active - 1] = forks [--forkcnt];
		3080	ev_active (forks [active - 1]) = active;
		3081	}
		3082
		3083	ev_stop (EV_A_ (W)w);
		3084
		3085	EV_FREQUENT_CHECK;
		3086	}
		3087	#endif
		3088
		3089	#if EV_ASYNC_ENABLE
		3090	void
		3091	ev_async_start (EV_P_ ev_async *w)
		3092	{
		3093	if (expect_false (ev_is_active (w)))
		3094	return;
		3095
		3096	evpipe_init (EV_A);
		3097
		3098	EV_FREQUENT_CHECK;
		3099
		3100	ev_start (EV_A_ (W)w, ++asynccnt);
		3101	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		3102	asyncs [asynccnt - 1] = w;
		3103
		3104	EV_FREQUENT_CHECK;
		3105	}
		3106
		3107	void
		3108	ev_async_stop (EV_P_ ev_async *w)
		3109	{
		3110	clear_pending (EV_A_ (W)w);
		3111	if (expect_false (!ev_is_active (w)))
		3112	return;
		3113
		3114	EV_FREQUENT_CHECK;
		3115
		3116	{
		3117	int active = ev_active (w);
		3118
		3119	asyncs [active - 1] = asyncs [--asynccnt];
		3120	ev_active (asyncs [active - 1]) = active;
		3121	}
		3122
		3123	ev_stop (EV_A_ (W)w);
		3124
		3125	EV_FREQUENT_CHECK;
		3126	}
		3127
		3128	void
		3129	ev_async_send (EV_P_ ev_async *w)
		3130	{
		3131	w->sent = 1;
		3132	evpipe_write (EV_A_ &gotasync);
		3133	}
		3134	#endif
1381		3135
1382	/*****************************************************************************/	3136	/*****************************************************************************/
1383		3137
1384	struct ev_once	3138	struct ev_once
1385	{	3139	{
1386	struct ev_io io;	3140	ev_io io;
1387	struct ev_timer to;	3141	ev_timer to;
1388	void (*cb)(int revents, void *arg);	3142	void (*cb)(int revents, void *arg);
1389	void *arg;	3143	void *arg;
1390	};	3144	};
1391		3145
1392	static void	3146	static void
1393	once_cb (EV_P_ struct ev_once *once, int revents)	3147	once_cb (EV_P_ struct ev_once *once, int revents)
1394	{	3148	{
1395	void (*cb)(int revents, void *arg) = once->cb;	3149	void (*cb)(int revents, void *arg) = once->cb;
1396	void *arg = once->arg;	3150	void *arg = once->arg;
1397		3151
1398	ev_io_stop (EV_A_ &once->io);	3152	ev_io_stop (EV_A_ &once->io);
1399	ev_timer_stop (EV_A_ &once->to);	3153	ev_timer_stop (EV_A_ &once->to);
1400	free (once);	3154	ev_free (once);
1401		3155
1402	cb (revents, arg);	3156	cb (revents, arg);
1403	}	3157	}
1404		3158
1405	static void	3159	static void
1406	once_cb_io (EV_P_ struct ev_io *w, int revents)	3160	once_cb_io (EV_P_ ev_io *w, int revents)
1407	{	3161	{
1408	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3162	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3163
		3164	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1409	}	3165	}
1410		3166
1411	static void	3167	static void
1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)	3168	once_cb_to (EV_P_ ev_timer *w, int revents)
1413	{	3169	{
1414	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3170	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3171
		3172	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1415	}	3173	}
1416		3174
1417	void	3175	void
1418	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3176	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1419	{	3177	{
1420	struct ev_once *once = malloc (sizeof (struct ev_once));	3178	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1421		3179
1422	if (!once)	3180	if (expect_false (!once))
		3181	{
1423	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	3182	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1424	else	3183	return;
1425	{	3184	}
		3185
1426	once->cb = cb;	3186	once->cb = cb;
1427	once->arg = arg;	3187	once->arg = arg;
1428		3188
1429	ev_watcher_init (&once->io, once_cb_io);	3189	ev_init (&once->io, once_cb_io);
1430	if (fd >= 0)	3190	if (fd >= 0)
		3191	{
		3192	ev_io_set (&once->io, fd, events);
		3193	ev_io_start (EV_A_ &once->io);
		3194	}
		3195
		3196	ev_init (&once->to, once_cb_to);
		3197	if (timeout >= 0.)
		3198	{
		3199	ev_timer_set (&once->to, timeout, 0.);
		3200	ev_timer_start (EV_A_ &once->to);
		3201	}
		3202	}
		3203
		3204	/*****************************************************************************/
		3205
		3206	#if 0
		3207	void
		3208	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3209	{
		3210	int i, j;
		3211	ev_watcher_list *wl, *wn;
		3212
		3213	if (types & (EV_IO | EV_EMBED))
		3214	for (i = 0; i < anfdmax; ++i)
		3215	for (wl = anfds [i].head; wl; )
1431	{	3216	{
1432	ev_io_set (&once->io, fd, events);	3217	wn = wl->next;
1433	ev_io_start (EV_A_ &once->io);	3218
		3219	#if EV_EMBED_ENABLE
		3220	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3221	{
		3222	if (types & EV_EMBED)
		3223	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3224	}
		3225	else
		3226	#endif
		3227	#if EV_USE_INOTIFY
		3228	if (ev_cb ((ev_io *)wl) == infy_cb)
		3229	;
		3230	else
		3231	#endif
		3232	if ((ev_io *)wl != &pipeev)
		3233	if (types & EV_IO)
		3234	cb (EV_A_ EV_IO, wl);
		3235
		3236	wl = wn;
1434	}	3237	}
1435		3238
1436	ev_watcher_init (&once->to, once_cb_to);	3239	if (types & (EV_TIMER | EV_STAT))
1437	if (timeout >= 0.)	3240	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3241	#if EV_STAT_ENABLE
		3242	/*TODO: timer is not always active*/
		3243	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1438	{	3244	{
1439	ev_timer_set (&once->to, timeout, 0.);	3245	if (types & EV_STAT)
1440	ev_timer_start (EV_A_ &once->to);	3246	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1441	}	3247	}
1442	}	3248	else
1443	}	3249	#endif
		3250	if (types & EV_TIMER)
		3251	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1444		3252
		3253	#if EV_PERIODIC_ENABLE
		3254	if (types & EV_PERIODIC)
		3255	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3256	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3257	#endif
		3258
		3259	#if EV_IDLE_ENABLE
		3260	if (types & EV_IDLE)
		3261	for (j = NUMPRI; i--; )
		3262	for (i = idlecnt [j]; i--; )
		3263	cb (EV_A_ EV_IDLE, idles [j][i]);
		3264	#endif
		3265
		3266	#if EV_FORK_ENABLE
		3267	if (types & EV_FORK)
		3268	for (i = forkcnt; i--; )
		3269	if (ev_cb (forks [i]) != embed_fork_cb)
		3270	cb (EV_A_ EV_FORK, forks [i]);
		3271	#endif
		3272
		3273	#if EV_ASYNC_ENABLE
		3274	if (types & EV_ASYNC)
		3275	for (i = asynccnt; i--; )
		3276	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3277	#endif
		3278
		3279	if (types & EV_PREPARE)
		3280	for (i = preparecnt; i--; )
		3281	#if EV_EMBED_ENABLE
		3282	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3283	#endif
		3284	cb (EV_A_ EV_PREPARE, prepares [i]);
		3285
		3286	if (types & EV_CHECK)
		3287	for (i = checkcnt; i--; )
		3288	cb (EV_A_ EV_CHECK, checks [i]);
		3289
		3290	if (types & EV_SIGNAL)
		3291	for (i = 0; i < signalmax; ++i)
		3292	for (wl = signals [i].head; wl; )
		3293	{
		3294	wn = wl->next;
		3295	cb (EV_A_ EV_SIGNAL, wl);
		3296	wl = wn;
		3297	}
		3298
		3299	if (types & EV_CHILD)
		3300	for (i = EV_PID_HASHSIZE; i--; )
		3301	for (wl = childs [i]; wl; )
		3302	{
		3303	wn = wl->next;
		3304	cb (EV_A_ EV_CHILD, wl);
		3305	wl = wn;
		3306	}
		3307	/* EV_STAT 0x00001000 /* stat data changed */
		3308	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3309	}
		3310	#endif
		3311
		3312	#if EV_MULTIPLICITY
		3313	#include "ev_wrap.h"
		3314	#endif
		3315
		3316	#ifdef __cplusplus
		3317	}
		3318	#endif
		3319

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