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Comparing libev/ev.c (file contents):
Revision 1.84 by root, Fri Nov 9 23:04:35 2007 UTC vs.
Revision 1.241 by root, Fri May 9 13:57:00 2008 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 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
33		51
34	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
37	# endif	66	# endif
38		67
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
40	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
41	# endif	74	# endif
42		75
43	# if HAVE_POLL && HAVE_POLL_H	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
44	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
45	# endif	82	# endif
46		83
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
48	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
49	# endif	90	# endif
50		91
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
53	# endif	98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
54		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
55	#endif	132	#endif
56		133
57	#include <math.h>	134	#include <math.h>
58	#include <stdlib.h>	135	#include <stdlib.h>
59	#include <fcntl.h>	136	#include <fcntl.h>
…		…
66	#include <sys/types.h>	143	#include <sys/types.h>
67	#include <time.h>	144	#include <time.h>
68		145
69	#include <signal.h>	146	#include <signal.h>
70		147
71	#ifndef WIN32
72	# include <unistd.h>
73	# include <sys/time.h>
74	# include <sys/wait.h>
75	#endif
76	/**/
77
78	#ifndef EV_USE_MONOTONIC
79	# define EV_USE_MONOTONIC 1
80	#endif
81
82	#ifndef EV_USE_SELECT
83	# define EV_USE_SELECT 1
84	#endif
85
86	#ifndef EV_USE_POLL
87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88	#endif
89
90	#ifndef EV_USE_EPOLL
91	# define EV_USE_EPOLL 0
92	#endif
93
94	#ifndef EV_USE_KQUEUE
95	# define EV_USE_KQUEUE 0
96	#endif
97
98	#ifndef EV_USE_WIN32
99	# ifdef WIN32
100	# define EV_USE_WIN32 0 /* it does not exist, use select */
101	# undef EV_USE_SELECT
102	# define EV_USE_SELECT 1
103	# else
104	# define EV_USE_WIN32 0
105	# endif
106	#endif
107
108	#ifndef EV_USE_REALTIME
109	# define EV_USE_REALTIME 1
110	#endif
111
112	/**/
113
114	#ifndef CLOCK_MONOTONIC
115	# undef EV_USE_MONOTONIC
116	# define EV_USE_MONOTONIC 0
117	#endif
118
119	#ifndef CLOCK_REALTIME
120	# undef EV_USE_REALTIME
121	# define EV_USE_REALTIME 0
122	#endif
123
124	/**/
125
126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130
131	#ifdef EV_H	148	#ifdef EV_H
132	# include EV_H	149	# include EV_H
133	#else	150	#else
134	# include "ev.h"	151	# include "ev.h"
135	#endif	152	#endif
136		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
		180	#ifndef EV_USE_SELECT
		181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
		192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
		196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
		242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
		244	# define EV_USE_MONOTONIC 0
		245	#endif
		246
		247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
		249	# define EV_USE_REALTIME 0
		250	#endif
		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		294
		295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		298
137	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
138	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
139	# define inline inline	301	# define noinline __attribute__ ((noinline))
140	#else	302	#else
141	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
142	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
143	#endif	308	#endif
144		309
145	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
146	#define expect_true(expr) expect ((expr) != 0, 1)	311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
147		319
148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
150		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
151	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
152	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
153	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
154		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
156		338
		339	#ifdef _WIN32
157	#include "ev_win32.c"	340	# include "ev_win32.c"
		341	#endif
158		342
159	/*****************************************************************************/	343	/*****************************************************************************/
160		344
161	static void (*syserr_cb)(const char *msg);	345	static void (*syserr_cb)(const char *msg);
162		346
		347	void
163	void ev_set_syserr_cb (void (*cb)(const char *msg))	348	ev_set_syserr_cb (void (*cb)(const char *msg))
164	{	349	{
165	syserr_cb = cb;	350	syserr_cb = cb;
166	}	351	}
167		352
168	static void	353	static void noinline
169	syserr (const char *msg)	354	syserr (const char *msg)
170	{	355	{
171	if (!msg)	356	if (!msg)
172	msg = "(libev) system error";	357	msg = "(libev) system error";
173		358
…		…
178	perror (msg);	363	perror (msg);
179	abort ();	364	abort ();
180	}	365	}
181	}	366	}
182		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
183	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184		384
		385	void
185	void ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
186	{	387	{
187	alloc = cb;	388	alloc = cb;
188	}	389	}
189		390
190	static void *	391	inline_speed void *
191	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
192	{	393	{
193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
194		395
195	if (!ptr && size)	396	if (!ptr && size)
196	{	397	{
197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
198	abort ();	399	abort ();
…		…
209	typedef struct	410	typedef struct
210	{	411	{
211	WL head;	412	WL head;
212	unsigned char events;	413	unsigned char events;
213	unsigned char reify;	414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
214	} ANFD;	418	} ANFD;
215		419
216	typedef struct	420	typedef struct
217	{	421	{
218	W w;	422	W w;
219	int events;	423	int events;
220	} ANPENDING;	424	} ANPENDING;
221		425
		426	#if EV_USE_INOTIFY
		427	/* hash table entry per inotify-id */
		428	typedef struct
		429	{
		430	WL head;
		431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#if EV_HEAP_CACHE_AT
		436	typedef struct {
		437	WT w;
		438	ev_tstamp at;
		439	} ANHE;
		440
		441	#define ANHE_w(he) (he) /* access watcher, read-write */
		442	#define ANHE_at(he) (he)->at /* acces cahced at, read-only */
		443	#define ANHE_at_set(he) (he)->at = (he)->w->at /* update at from watcher */
		444	#else
		445	typedef WT ANHE;
		446
		447	#define ANHE_w(he) (he)
		448	#define ANHE_at(he) (he)->at
		449	#define ANHE_at_set(he)
		450	#endif
		451
222	#if EV_MULTIPLICITY	452	#if EV_MULTIPLICITY
223		453
224	struct ev_loop	454	struct ev_loop
225	{	455	{
		456	ev_tstamp ev_rt_now;
		457	#define ev_rt_now ((loop)->ev_rt_now)
226	#define VAR(name,decl) decl;	458	#define VAR(name,decl) decl;
227	#include "ev_vars.h"	459	#include "ev_vars.h"
228	#undef VAR	460	#undef VAR
229	};	461	};
230	#include "ev_wrap.h"	462	#include "ev_wrap.h"
231		463
232	struct ev_loop default_loop_struct;	464	static struct ev_loop default_loop_struct;
233	static struct ev_loop *default_loop;	465	struct ev_loop *ev_default_loop_ptr;
234		466
235	#else	467	#else
236		468
		469	ev_tstamp ev_rt_now;
237	#define VAR(name,decl) static decl;	470	#define VAR(name,decl) static decl;
238	#include "ev_vars.h"	471	#include "ev_vars.h"
239	#undef VAR	472	#undef VAR
240		473
241	static int default_loop;	474	static int ev_default_loop_ptr;
242		475
243	#endif	476	#endif
244		477
245	/*****************************************************************************/	478	/*****************************************************************************/
246		479
247	inline ev_tstamp	480	ev_tstamp
248	ev_time (void)	481	ev_time (void)
249	{	482	{
250	#if EV_USE_REALTIME	483	#if EV_USE_REALTIME
251	struct timespec ts;	484	struct timespec ts;
252	clock_gettime (CLOCK_REALTIME, &ts);	485	clock_gettime (CLOCK_REALTIME, &ts);
…		…
256	gettimeofday (&tv, 0);	489	gettimeofday (&tv, 0);
257	return tv.tv_sec + tv.tv_usec * 1e-6;	490	return tv.tv_sec + tv.tv_usec * 1e-6;
258	#endif	491	#endif
259	}	492	}
260		493
261	inline ev_tstamp	494	ev_tstamp inline_size
262	get_clock (void)	495	get_clock (void)
263	{	496	{
264	#if EV_USE_MONOTONIC	497	#if EV_USE_MONOTONIC
265	if (expect_true (have_monotonic))	498	if (expect_true (have_monotonic))
266	{	499	{
…		…
271	#endif	504	#endif
272		505
273	return ev_time ();	506	return ev_time ();
274	}	507	}
275		508
		509	#if EV_MULTIPLICITY
276	ev_tstamp	510	ev_tstamp
277	ev_now (EV_P)	511	ev_now (EV_P)
278	{	512	{
279	return rt_now;	513	return ev_rt_now;
280	}	514	}
		515	#endif
281		516
282	#define array_roundsize(type,n) ((n) | 4 & ~3)	517	void
		518	ev_sleep (ev_tstamp delay)
		519	{
		520	if (delay > 0.)
		521	{
		522	#if EV_USE_NANOSLEEP
		523	struct timespec ts;
		524
		525	ts.tv_sec = (time_t)delay;
		526	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		527
		528	nanosleep (&ts, 0);
		529	#elif defined(_WIN32)
		530	Sleep ((unsigned long)(delay * 1e3));
		531	#else
		532	struct timeval tv;
		533
		534	tv.tv_sec = (time_t)delay;
		535	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		536
		537	select (0, 0, 0, 0, &tv);
		538	#endif
		539	}
		540	}
		541
		542	/*****************************************************************************/
		543
		544	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		545
		546	int inline_size
		547	array_nextsize (int elem, int cur, int cnt)
		548	{
		549	int ncur = cur + 1;
		550
		551	do
		552	ncur <<= 1;
		553	while (cnt > ncur);
		554
		555	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		556	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		557	{
		558	ncur *= elem;
		559	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		560	ncur = ncur - sizeof (void *) * 4;
		561	ncur /= elem;
		562	}
		563
		564	return ncur;
		565	}
		566
		567	static noinline void *
		568	array_realloc (int elem, void *base, int *cur, int cnt)
		569	{
		570	*cur = array_nextsize (elem, *cur, cnt);
		571	return ev_realloc (base, elem * *cur);
		572	}
283		573
284	#define array_needsize(type,base,cur,cnt,init) \	574	#define array_needsize(type,base,cur,cnt,init) \
285	if (expect_false ((cnt) > cur)) \	575	if (expect_false ((cnt) > (cur))) \
286	{ \	576	{ \
287	int newcnt = cur; \	577	int ocur_ = (cur); \
288	do \	578	(base) = (type *)array_realloc \
289	{ \	579	(sizeof (type), (base), &(cur), (cnt)); \
290	newcnt = array_roundsize (type, newcnt << 1); \	580	init ((base) + (ocur_), (cur) - ocur_); \
291	} \
292	while ((cnt) > newcnt); \
293	\
294	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295	init (base + cur, newcnt - cur); \
296	cur = newcnt; \
297	}	581	}
298		582
		583	#if 0
299	#define array_slim(type,stem) \	584	#define array_slim(type,stem) \
300	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	585	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301	{ \	586	{ \
302	stem ## max = array_roundsize (stem ## cnt >> 1); \	587	stem ## max = array_roundsize (stem ## cnt >> 1); \
303	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	588	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	589	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305	}	590	}
306		591	#endif
307	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309	#define array_free_microshit(stem) \
310	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311		592
312	#define array_free(stem, idx) \	593	#define array_free(stem, idx) \
313	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	594	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
314		595
315	/*****************************************************************************/	596	/*****************************************************************************/
316		597
317	static void	598	void noinline
		599	ev_feed_event (EV_P_ void *w, int revents)
		600	{
		601	W w_ = (W)w;
		602	int pri = ABSPRI (w_);
		603
		604	if (expect_false (w_->pending))
		605	pendings [pri][w_->pending - 1].events |= revents;
		606	else
		607	{
		608	w_->pending = ++pendingcnt [pri];
		609	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		610	pendings [pri][w_->pending - 1].w = w_;
		611	pendings [pri][w_->pending - 1].events = revents;
		612	}
		613	}
		614
		615	void inline_speed
		616	queue_events (EV_P_ W *events, int eventcnt, int type)
		617	{
		618	int i;
		619
		620	for (i = 0; i < eventcnt; ++i)
		621	ev_feed_event (EV_A_ events [i], type);
		622	}
		623
		624	/*****************************************************************************/
		625
		626	void inline_size
318	anfds_init (ANFD *base, int count)	627	anfds_init (ANFD *base, int count)
319	{	628	{
320	while (count--)	629	while (count--)
321	{	630	{
322	base->head = 0;	631	base->head = 0;
…		…
325		634
326	++base;	635	++base;
327	}	636	}
328	}	637	}
329		638
330	void	639	void inline_speed
331	ev_feed_event (EV_P_ void *w, int revents)
332	{
333	W w_ = (W)w;
334
335	if (w_->pending)
336	{
337	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
338	return;
339	}
340
341	w_->pending = ++pendingcnt [ABSPRI (w_)];
342	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345	}
346
347	static void
348	queue_events (EV_P_ W *events, int eventcnt, int type)
349	{
350	int i;
351
352	for (i = 0; i < eventcnt; ++i)
353	ev_feed_event (EV_A_ events [i], type);
354	}
355
356	inline void
357	fd_event (EV_P_ int fd, int revents)	640	fd_event (EV_P_ int fd, int revents)
358	{	641	{
359	ANFD *anfd = anfds + fd;	642	ANFD *anfd = anfds + fd;
360	struct ev_io *w;	643	ev_io *w;
361		644
362	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	645	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363	{	646	{
364	int ev = w->events & revents;	647	int ev = w->events & revents;
365		648
366	if (ev)	649	if (ev)
367	ev_feed_event (EV_A_ (W)w, ev);	650	ev_feed_event (EV_A_ (W)w, ev);
…		…
369	}	652	}
370		653
371	void	654	void
372	ev_feed_fd_event (EV_P_ int fd, int revents)	655	ev_feed_fd_event (EV_P_ int fd, int revents)
373	{	656	{
		657	if (fd >= 0 && fd < anfdmax)
374	fd_event (EV_A_ fd, revents);	658	fd_event (EV_A_ fd, revents);
375	}	659	}
376		660
377	/*****************************************************************************/	661	void inline_size
378
379	static void
380	fd_reify (EV_P)	662	fd_reify (EV_P)
381	{	663	{
382	int i;	664	int i;
383		665
384	for (i = 0; i < fdchangecnt; ++i)	666	for (i = 0; i < fdchangecnt; ++i)
385	{	667	{
386	int fd = fdchanges [i];	668	int fd = fdchanges [i];
387	ANFD *anfd = anfds + fd;	669	ANFD *anfd = anfds + fd;
388	struct ev_io *w;	670	ev_io *w;
389		671
390	int events = 0;	672	unsigned char events = 0;
391		673
392	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	674	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
393	events |= w->events;	675	events |= (unsigned char)w->events;
394		676
		677	#if EV_SELECT_IS_WINSOCKET
		678	if (events)
		679	{
		680	unsigned long argp;
		681	#ifdef EV_FD_TO_WIN32_HANDLE
		682	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		683	#else
		684	anfd->handle = _get_osfhandle (fd);
		685	#endif
		686	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		687	}
		688	#endif
		689
		690	{
		691	unsigned char o_events = anfd->events;
		692	unsigned char o_reify = anfd->reify;
		693
395	anfd->reify = 0;	694	anfd->reify = 0;
396
397	method_modify (EV_A_ fd, anfd->events, events);
398	anfd->events = events;	695	anfd->events = events;
		696
		697	if (o_events != events || o_reify & EV_IOFDSET)
		698	backend_modify (EV_A_ fd, o_events, events);
		699	}
399	}	700	}
400		701
401	fdchangecnt = 0;	702	fdchangecnt = 0;
402	}	703	}
403		704
404	static void	705	void inline_size
405	fd_change (EV_P_ int fd)	706	fd_change (EV_P_ int fd, int flags)
406	{	707	{
407	if (anfds [fd].reify)	708	unsigned char reify = anfds [fd].reify;
408	return;
409
410	anfds [fd].reify = 1;	709	anfds [fd].reify |= flags;
411		710
		711	if (expect_true (!reify))
		712	{
412	++fdchangecnt;	713	++fdchangecnt;
413	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));	714	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414	fdchanges [fdchangecnt - 1] = fd;	715	fdchanges [fdchangecnt - 1] = fd;
		716	}
415	}	717	}
416		718
417	static void	719	void inline_speed
418	fd_kill (EV_P_ int fd)	720	fd_kill (EV_P_ int fd)
419	{	721	{
420	struct ev_io *w;	722	ev_io *w;
421		723
422	while ((w = (struct ev_io *)anfds [fd].head))	724	while ((w = (ev_io *)anfds [fd].head))
423	{	725	{
424	ev_io_stop (EV_A_ w);	726	ev_io_stop (EV_A_ w);
425	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	727	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426	}	728	}
427	}	729	}
428		730
429	static int	731	int inline_size
430	fd_valid (int fd)	732	fd_valid (int fd)
431	{	733	{
432	#ifdef WIN32	734	#ifdef _WIN32
433	return !!win32_get_osfhandle (fd);	735	return _get_osfhandle (fd) != -1;
434	#else	736	#else
435	return fcntl (fd, F_GETFD) != -1;	737	return fcntl (fd, F_GETFD) != -1;
436	#endif	738	#endif
437	}	739	}
438		740
439	/* called on EBADF to verify fds */	741	/* called on EBADF to verify fds */
440	static void	742	static void noinline
441	fd_ebadf (EV_P)	743	fd_ebadf (EV_P)
442	{	744	{
443	int fd;	745	int fd;
444		746
445	for (fd = 0; fd < anfdmax; ++fd)	747	for (fd = 0; fd < anfdmax; ++fd)
…		…
447	if (!fd_valid (fd) == -1 && errno == EBADF)	749	if (!fd_valid (fd) == -1 && errno == EBADF)
448	fd_kill (EV_A_ fd);	750	fd_kill (EV_A_ fd);
449	}	751	}
450		752
451	/* called on ENOMEM in select/poll to kill some fds and retry */	753	/* called on ENOMEM in select/poll to kill some fds and retry */
452	static void	754	static void noinline
453	fd_enomem (EV_P)	755	fd_enomem (EV_P)
454	{	756	{
455	int fd;	757	int fd;
456		758
457	for (fd = anfdmax; fd--; )	759	for (fd = anfdmax; fd--; )
…		…
460	fd_kill (EV_A_ fd);	762	fd_kill (EV_A_ fd);
461	return;	763	return;
462	}	764	}
463	}	765	}
464		766
465	/* usually called after fork if method needs to re-arm all fds from scratch */	767	/* usually called after fork if backend needs to re-arm all fds from scratch */
466	static void	768	static void noinline
467	fd_rearm_all (EV_P)	769	fd_rearm_all (EV_P)
468	{	770	{
469	int fd;	771	int fd;
470		772
471	/* this should be highly optimised to not do anything but set a flag */
472	for (fd = 0; fd < anfdmax; ++fd)	773	for (fd = 0; fd < anfdmax; ++fd)
473	if (anfds [fd].events)	774	if (anfds [fd].events)
474	{	775	{
475	anfds [fd].events = 0;	776	anfds [fd].events = 0;
476	fd_change (EV_A_ fd);	777	fd_change (EV_A_ fd, EV_IOFDSET | 1);
477	}	778	}
478	}	779	}
479		780
480	/*****************************************************************************/	781	/*****************************************************************************/
481		782
482	static void	783	/*
		784	* the heap functions want a real array index. array index 0 uis guaranteed to not
		785	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		786	* the branching factor of the d-tree.
		787	*/
		788
		789	/*
		790	* at the moment we allow libev the luxury of two heaps,
		791	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		792	* which is more cache-efficient.
		793	* the difference is about 5% with 50000+ watchers.
		794	*/
		795	#define EV_USE_4HEAP !EV_MINIMAL
		796	#if EV_USE_4HEAP
		797
		798	#define DHEAP 4
		799	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		800
		801	/* towards the root */
		802	void inline_speed
483	upheap (WT *heap, int k)	803	upheap (ANHE *heap, int k)
484	{	804	{
485	WT w = heap [k];	805	ANHE he = heap [k];
486		806
487	while (k && heap [k >> 1]->at > w->at)	807	for (;;)
488	{	808	{
		809	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		810
		811	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
		812	break;
		813
489	heap [k] = heap [k >> 1];	814	heap [k] = heap [p];
490	((W)heap [k])->active = k + 1;	815	ev_active (ANHE_w (heap [k])) = k;
491	k >>= 1;	816	k = p;
		817	}
		818
		819	ev_active (ANHE_w (he)) = k;
		820	heap [k] = he;
		821	}
		822
		823	/* away from the root */
		824	void inline_speed
		825	downheap (ANHE *heap, int N, int k)
		826	{
		827	ANHE he = heap [k];
		828	ANHE *E = heap + N + HEAP0;
		829
		830	for (;;)
		831	{
		832	ev_tstamp minat;
		833	ANHE *minpos;
		834	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		835
		836	// find minimum child
		837	if (expect_true (pos + DHEAP - 1 < E))
		838	{
		839	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		840	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		841	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		843	}
		844	else if (pos < E)
		845	{
		846	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else
		852	break;
		853
		854	if (ANHE_at (he) <= minat)
		855	break;
		856
		857	ev_active (ANHE_w (*minpos)) = k;
		858	heap [k] = *minpos;
		859
		860	k = minpos - heap;
		861	}
		862
		863	ev_active (ANHE_w (he)) = k;
		864	heap [k] = he;
		865	}
		866
		867	#else // 4HEAP
		868
		869	#define HEAP0 1
		870
		871	/* towards the root */
		872	void inline_speed
		873	upheap (ANHE *heap, int k)
		874	{
		875	ANHE he = heap [k];
		876
		877	for (;;)
		878	{
		879	int p = k >> 1;
		880
		881	/* maybe we could use a dummy element at heap [0]? */
		882	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		883	break;
		884
		885	heap [k] = heap [p];
		886	ev_active (ANHE_w (heap [k])) = k;
		887	k = p;
492	}	888	}
493		889
494	heap [k] = w;	890	heap [k] = w;
495	((W)heap [k])->active = k + 1;	891	ev_active (ANHE_w (heap [k])) = k;
496
497	}	892	}
498		893
499	static void	894	/* away from the root */
		895	void inline_speed
500	downheap (WT *heap, int N, int k)	896	downheap (ANHE *heap, int N, int k)
501	{	897	{
502	WT w = heap [k];	898	ANHE he = heap [k];
503		899
504	while (k < (N >> 1))	900	for (;;)
505	{	901	{
506	int j = k << 1;	902	int c = k << 1;
507		903
508	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	904	if (c > N)
509	++j;
510
511	if (w->at <= heap [j]->at)
512	break;	905	break;
513		906
		907	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		908	? 1 : 0;
		909
		910	if (w->at <= ANHE_at (heap [c]))
		911	break;
		912
514	heap [k] = heap [j];	913	heap [k] = heap [c];
515	((W)heap [k])->active = k + 1;	914	ev_active (ANHE_w (heap [k])) = k;
		915
516	k = j;	916	k = c;
517	}	917	}
518		918
519	heap [k] = w;	919	heap [k] = he;
520	((W)heap [k])->active = k + 1;	920	ev_active (ANHE_w (he)) = k;
521	}	921	}
		922	#endif
522		923
523	inline void	924	void inline_size
524	adjustheap (WT *heap, int N, int k, ev_tstamp at)	925	adjustheap (ANHE *heap, int N, int k)
525	{	926	{
526	ev_tstamp old_at = heap [k]->at;	927	upheap (heap, k);
527	heap [k]->at = at;
528
529	if (old_at < at)
530	downheap (heap, N, k);	928	downheap (heap, N, k);
531	else
532	upheap (heap, k);
533	}	929	}
534		930
535	/*****************************************************************************/	931	/*****************************************************************************/
536		932
537	typedef struct	933	typedef struct
538	{	934	{
539	WL head;	935	WL head;
540	sig_atomic_t volatile gotsig;	936	EV_ATOMIC_T gotsig;
541	} ANSIG;	937	} ANSIG;
542		938
543	static ANSIG *signals;	939	static ANSIG *signals;
544	static int signalmax;	940	static int signalmax;
545		941
546	static int sigpipe [2];	942	static EV_ATOMIC_T gotsig;
547	static sig_atomic_t volatile gotsig;
548	static struct ev_io sigev;
549		943
550	static void	944	void inline_size
551	signals_init (ANSIG *base, int count)	945	signals_init (ANSIG *base, int count)
552	{	946	{
553	while (count--)	947	while (count--)
554	{	948	{
555	base->head = 0;	949	base->head = 0;
…		…
557		951
558	++base;	952	++base;
559	}	953	}
560	}	954	}
561		955
		956	/*****************************************************************************/
		957
		958	void inline_speed
		959	fd_intern (int fd)
		960	{
		961	#ifdef _WIN32
		962	int arg = 1;
		963	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		964	#else
		965	fcntl (fd, F_SETFD, FD_CLOEXEC);
		966	fcntl (fd, F_SETFL, O_NONBLOCK);
		967	#endif
		968	}
		969
		970	static void noinline
		971	evpipe_init (EV_P)
		972	{
		973	if (!ev_is_active (&pipeev))
		974	{
		975	#if EV_USE_EVENTFD
		976	if ((evfd = eventfd (0, 0)) >= 0)
		977	{
		978	evpipe [0] = -1;
		979	fd_intern (evfd);
		980	ev_io_set (&pipeev, evfd, EV_READ);
		981	}
		982	else
		983	#endif
		984	{
		985	while (pipe (evpipe))
		986	syserr ("(libev) error creating signal/async pipe");
		987
		988	fd_intern (evpipe [0]);
		989	fd_intern (evpipe [1]);
		990	ev_io_set (&pipeev, evpipe [0], EV_READ);
		991	}
		992
		993	ev_io_start (EV_A_ &pipeev);
		994	ev_unref (EV_A); /* watcher should not keep loop alive */
		995	}
		996	}
		997
		998	void inline_size
		999	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1000	{
		1001	if (!*flag)
		1002	{
		1003	int old_errno = errno; /* save errno because write might clobber it */
		1004
		1005	*flag = 1;
		1006
		1007	#if EV_USE_EVENTFD
		1008	if (evfd >= 0)
		1009	{
		1010	uint64_t counter = 1;
		1011	write (evfd, &counter, sizeof (uint64_t));
		1012	}
		1013	else
		1014	#endif
		1015	write (evpipe [1], &old_errno, 1);
		1016
		1017	errno = old_errno;
		1018	}
		1019	}
		1020
562	static void	1021	static void
		1022	pipecb (EV_P_ ev_io *iow, int revents)
		1023	{
		1024	#if EV_USE_EVENTFD
		1025	if (evfd >= 0)
		1026	{
		1027	uint64_t counter;
		1028	read (evfd, &counter, sizeof (uint64_t));
		1029	}
		1030	else
		1031	#endif
		1032	{
		1033	char dummy;
		1034	read (evpipe [0], &dummy, 1);
		1035	}
		1036
		1037	if (gotsig && ev_is_default_loop (EV_A))
		1038	{
		1039	int signum;
		1040	gotsig = 0;
		1041
		1042	for (signum = signalmax; signum--; )
		1043	if (signals [signum].gotsig)
		1044	ev_feed_signal_event (EV_A_ signum + 1);
		1045	}
		1046
		1047	#if EV_ASYNC_ENABLE
		1048	if (gotasync)
		1049	{
		1050	int i;
		1051	gotasync = 0;
		1052
		1053	for (i = asynccnt; i--; )
		1054	if (asyncs [i]->sent)
		1055	{
		1056	asyncs [i]->sent = 0;
		1057	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1058	}
		1059	}
		1060	#endif
		1061	}
		1062
		1063	/*****************************************************************************/
		1064
		1065	static void
563	sighandler (int signum)	1066	ev_sighandler (int signum)
564	{	1067	{
		1068	#if EV_MULTIPLICITY
		1069	struct ev_loop *loop = &default_loop_struct;
		1070	#endif
		1071
565	#if WIN32	1072	#if _WIN32
566	signal (signum, sighandler);	1073	signal (signum, ev_sighandler);
567	#endif	1074	#endif
568		1075
569	signals [signum - 1].gotsig = 1;	1076	signals [signum - 1].gotsig = 1;
570		1077	evpipe_write (EV_A_ &gotsig);
571	if (!gotsig)
572	{
573	int old_errno = errno;
574	gotsig = 1;
575	#ifdef WIN32
576	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
577	#else
578	write (sigpipe [1], &signum, 1);
579	#endif
580	errno = old_errno;
581	}
582	}	1078	}
583		1079
584	void	1080	void noinline
585	ev_feed_signal_event (EV_P_ int signum)	1081	ev_feed_signal_event (EV_P_ int signum)
586	{	1082	{
587	WL w;	1083	WL w;
588		1084
589	#if EV_MULTIPLICITY	1085	#if EV_MULTIPLICITY
590	assert (("feeding signal events is only supported in the default loop", loop == default_loop));	1086	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
591	#endif	1087	#endif
592		1088
593	--signum;	1089	--signum;
594		1090
595	if (signum < 0 || signum >= signalmax)	1091	if (signum < 0 || signum >= signalmax)
…		…
599		1095
600	for (w = signals [signum].head; w; w = w->next)	1096	for (w = signals [signum].head; w; w = w->next)
601	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1097	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
602	}	1098	}
603		1099
604	static void
605	sigcb (EV_P_ struct ev_io *iow, int revents)
606	{
607	int signum;
608
609	#ifdef WIN32
610	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
611	#else
612	read (sigpipe [0], &revents, 1);
613	#endif
614	gotsig = 0;
615
616	for (signum = signalmax; signum--; )
617	if (signals [signum].gotsig)
618	ev_feed_signal_event (EV_A_ signum + 1);
619	}
620
621	static void
622	siginit (EV_P)
623	{
624	#ifndef WIN32
625	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
626	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
627
628	/* rather than sort out wether we really need nb, set it */
629	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
630	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
631	#endif
632
633	ev_io_set (&sigev, sigpipe [0], EV_READ);
634	ev_io_start (EV_A_ &sigev);
635	ev_unref (EV_A); /* child watcher should not keep loop alive */
636	}
637
638	/*****************************************************************************/	1100	/*****************************************************************************/
639		1101
640	static struct ev_child *childs [PID_HASHSIZE];	1102	static WL childs [EV_PID_HASHSIZE];
641		1103
642	#ifndef WIN32	1104	#ifndef _WIN32
643		1105
644	static struct ev_signal childev;	1106	static ev_signal childev;
		1107
		1108	#ifndef WIFCONTINUED
		1109	# define WIFCONTINUED(status) 0
		1110	#endif
		1111
		1112	void inline_speed
		1113	child_reap (EV_P_ int chain, int pid, int status)
		1114	{
		1115	ev_child *w;
		1116	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1117
		1118	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1119	{
		1120	if ((w->pid == pid || !w->pid)
		1121	&& (!traced || (w->flags & 1)))
		1122	{
		1123	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1124	w->rpid = pid;
		1125	w->rstatus = status;
		1126	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1127	}
		1128	}
		1129	}
645		1130
646	#ifndef WCONTINUED	1131	#ifndef WCONTINUED
647	# define WCONTINUED 0	1132	# define WCONTINUED 0
648	#endif	1133	#endif
649		1134
650	static void	1135	static void
651	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
652	{
653	struct ev_child *w;
654
655	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
656	if (w->pid == pid || !w->pid)
657	{
658	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
659	w->rpid = pid;
660	w->rstatus = status;
661	ev_feed_event (EV_A_ (W)w, EV_CHILD);
662	}
663	}
664
665	static void
666	childcb (EV_P_ struct ev_signal *sw, int revents)	1136	childcb (EV_P_ ev_signal *sw, int revents)
667	{	1137	{
668	int pid, status;	1138	int pid, status;
669		1139
		1140	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
670	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1141	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
671	{	1142	if (!WCONTINUED
		1143	|| errno != EINVAL
		1144	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1145	return;
		1146
672	/* make sure we are called again until all childs have been reaped */	1147	/* make sure we are called again until all children have been reaped */
		1148	/* we need to do it this way so that the callback gets called before we continue */
673	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1149	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
674		1150
675	child_reap (EV_A_ sw, pid, pid, status);	1151	child_reap (EV_A_ pid, pid, status);
		1152	if (EV_PID_HASHSIZE > 1)
676	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1153	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
677	}
678	}	1154	}
679		1155
680	#endif	1156	#endif
681		1157
682	/*****************************************************************************/	1158	/*****************************************************************************/
683		1159
		1160	#if EV_USE_PORT
		1161	# include "ev_port.c"
		1162	#endif
684	#if EV_USE_KQUEUE	1163	#if EV_USE_KQUEUE
685	# include "ev_kqueue.c"	1164	# include "ev_kqueue.c"
686	#endif	1165	#endif
687	#if EV_USE_EPOLL	1166	#if EV_USE_EPOLL
688	# include "ev_epoll.c"	1167	# include "ev_epoll.c"
…		…
705	{	1184	{
706	return EV_VERSION_MINOR;	1185	return EV_VERSION_MINOR;
707	}	1186	}
708		1187
709	/* return true if we are running with elevated privileges and should ignore env variables */	1188	/* return true if we are running with elevated privileges and should ignore env variables */
710	static int	1189	int inline_size
711	enable_secure (void)	1190	enable_secure (void)
712	{	1191	{
713	#ifdef WIN32	1192	#ifdef _WIN32
714	return 0;	1193	return 0;
715	#else	1194	#else
716	return getuid () != geteuid ()	1195	return getuid () != geteuid ()
717	|| getgid () != getegid ();	1196	|| getgid () != getegid ();
718	#endif	1197	#endif
719	}	1198	}
720		1199
721	int	1200	unsigned int
722	ev_method (EV_P)	1201	ev_supported_backends (void)
723	{	1202	{
724	return method;	1203	unsigned int flags = 0;
725	}
726		1204
727	static void	1205	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
728	loop_init (EV_P_ int methods)	1206	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1207	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1208	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1209	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1210
		1211	return flags;
		1212	}
		1213
		1214	unsigned int
		1215	ev_recommended_backends (void)
729	{	1216	{
730	if (!method)	1217	unsigned int flags = ev_supported_backends ();
		1218
		1219	#ifndef __NetBSD__
		1220	/* kqueue is borked on everything but netbsd apparently */
		1221	/* it usually doesn't work correctly on anything but sockets and pipes */
		1222	flags &= ~EVBACKEND_KQUEUE;
		1223	#endif
		1224	#ifdef __APPLE__
		1225	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1226	flags &= ~EVBACKEND_POLL;
		1227	#endif
		1228
		1229	return flags;
		1230	}
		1231
		1232	unsigned int
		1233	ev_embeddable_backends (void)
		1234	{
		1235	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1236
		1237	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1238	/* please fix it and tell me how to detect the fix */
		1239	flags &= ~EVBACKEND_EPOLL;
		1240
		1241	return flags;
		1242	}
		1243
		1244	unsigned int
		1245	ev_backend (EV_P)
		1246	{
		1247	return backend;
		1248	}
		1249
		1250	unsigned int
		1251	ev_loop_count (EV_P)
		1252	{
		1253	return loop_count;
		1254	}
		1255
		1256	void
		1257	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1258	{
		1259	io_blocktime = interval;
		1260	}
		1261
		1262	void
		1263	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1264	{
		1265	timeout_blocktime = interval;
		1266	}
		1267
		1268	static void noinline
		1269	loop_init (EV_P_ unsigned int flags)
		1270	{
		1271	if (!backend)
731	{	1272	{
732	#if EV_USE_MONOTONIC	1273	#if EV_USE_MONOTONIC
733	{	1274	{
734	struct timespec ts;	1275	struct timespec ts;
735	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1276	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
736	have_monotonic = 1;	1277	have_monotonic = 1;
737	}	1278	}
738	#endif	1279	#endif
739		1280
740	rt_now = ev_time ();	1281	ev_rt_now = ev_time ();
741	mn_now = get_clock ();	1282	mn_now = get_clock ();
742	now_floor = mn_now;	1283	now_floor = mn_now;
743	rtmn_diff = rt_now - mn_now;	1284	rtmn_diff = ev_rt_now - mn_now;
744		1285
745	if (methods == EVMETHOD_AUTO)	1286	io_blocktime = 0.;
746	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1287	timeout_blocktime = 0.;
		1288	backend = 0;
		1289	backend_fd = -1;
		1290	gotasync = 0;
		1291	#if EV_USE_INOTIFY
		1292	fs_fd = -2;
		1293	#endif
		1294
		1295	/* pid check not overridable via env */
		1296	#ifndef _WIN32
		1297	if (flags & EVFLAG_FORKCHECK)
		1298	curpid = getpid ();
		1299	#endif
		1300
		1301	if (!(flags & EVFLAG_NOENV)
		1302	&& !enable_secure ()
		1303	&& getenv ("LIBEV_FLAGS"))
747	methods = atoi (getenv ("LIBEV_METHODS"));	1304	flags = atoi (getenv ("LIBEV_FLAGS"));
748	else
749	methods = EVMETHOD_ANY;
750		1305
751	method = 0;	1306	if (!(flags & 0x0000ffffU))
752	#if EV_USE_WIN32	1307	flags |= ev_recommended_backends ();
753	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	1308
		1309	#if EV_USE_PORT
		1310	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
754	#endif	1311	#endif
755	#if EV_USE_KQUEUE	1312	#if EV_USE_KQUEUE
756	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1313	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
757	#endif	1314	#endif
758	#if EV_USE_EPOLL	1315	#if EV_USE_EPOLL
759	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1316	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
760	#endif	1317	#endif
761	#if EV_USE_POLL	1318	#if EV_USE_POLL
762	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1319	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
763	#endif	1320	#endif
764	#if EV_USE_SELECT	1321	#if EV_USE_SELECT
765	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1322	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
766	#endif	1323	#endif
767		1324
768	ev_init (&sigev, sigcb);	1325	ev_init (&pipeev, pipecb);
769	ev_set_priority (&sigev, EV_MAXPRI);	1326	ev_set_priority (&pipeev, EV_MAXPRI);
770	}	1327	}
771	}	1328	}
772		1329
773	void	1330	static void noinline
774	loop_destroy (EV_P)	1331	loop_destroy (EV_P)
775	{	1332	{
776	int i;	1333	int i;
777		1334
		1335	if (ev_is_active (&pipeev))
		1336	{
		1337	ev_ref (EV_A); /* signal watcher */
		1338	ev_io_stop (EV_A_ &pipeev);
		1339
		1340	#if EV_USE_EVENTFD
		1341	if (evfd >= 0)
		1342	close (evfd);
		1343	#endif
		1344
		1345	if (evpipe [0] >= 0)
		1346	{
		1347	close (evpipe [0]);
		1348	close (evpipe [1]);
		1349	}
		1350	}
		1351
778	#if EV_USE_WIN32	1352	#if EV_USE_INOTIFY
779	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	1353	if (fs_fd >= 0)
		1354	close (fs_fd);
		1355	#endif
		1356
		1357	if (backend_fd >= 0)
		1358	close (backend_fd);
		1359
		1360	#if EV_USE_PORT
		1361	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
780	#endif	1362	#endif
781	#if EV_USE_KQUEUE	1363	#if EV_USE_KQUEUE
782	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1364	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
783	#endif	1365	#endif
784	#if EV_USE_EPOLL	1366	#if EV_USE_EPOLL
785	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1367	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
786	#endif	1368	#endif
787	#if EV_USE_POLL	1369	#if EV_USE_POLL
788	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1370	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
789	#endif	1371	#endif
790	#if EV_USE_SELECT	1372	#if EV_USE_SELECT
791	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1373	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
792	#endif	1374	#endif
793		1375
794	for (i = NUMPRI; i--; )	1376	for (i = NUMPRI; i--; )
		1377	{
795	array_free (pending, [i]);	1378	array_free (pending, [i]);
		1379	#if EV_IDLE_ENABLE
		1380	array_free (idle, [i]);
		1381	#endif
		1382	}
		1383
		1384	ev_free (anfds); anfdmax = 0;
796		1385
797	/* have to use the microsoft-never-gets-it-right macro */	1386	/* have to use the microsoft-never-gets-it-right macro */
798	array_free_microshit (fdchange);	1387	array_free (fdchange, EMPTY);
799	array_free_microshit (timer);	1388	array_free (timer, EMPTY);
800	array_free_microshit (periodic);	1389	#if EV_PERIODIC_ENABLE
801	array_free_microshit (idle);	1390	array_free (periodic, EMPTY);
802	array_free_microshit (prepare);	1391	#endif
803	array_free_microshit (check);	1392	#if EV_FORK_ENABLE
		1393	array_free (fork, EMPTY);
		1394	#endif
		1395	array_free (prepare, EMPTY);
		1396	array_free (check, EMPTY);
		1397	#if EV_ASYNC_ENABLE
		1398	array_free (async, EMPTY);
		1399	#endif
804		1400
805	method = 0;	1401	backend = 0;
806	}	1402	}
807		1403
808	static void	1404	#if EV_USE_INOTIFY
		1405	void inline_size infy_fork (EV_P);
		1406	#endif
		1407
		1408	void inline_size
809	loop_fork (EV_P)	1409	loop_fork (EV_P)
810	{	1410	{
		1411	#if EV_USE_PORT
		1412	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1413	#endif
		1414	#if EV_USE_KQUEUE
		1415	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1416	#endif
811	#if EV_USE_EPOLL	1417	#if EV_USE_EPOLL
812	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1418	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
813	#endif	1419	#endif
814	#if EV_USE_KQUEUE	1420	#if EV_USE_INOTIFY
815	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1421	infy_fork (EV_A);
816	#endif	1422	#endif
817		1423
818	if (ev_is_active (&sigev))	1424	if (ev_is_active (&pipeev))
819	{	1425	{
820	/* default loop */	1426	/* this "locks" the handlers against writing to the pipe */
		1427	/* while we modify the fd vars */
		1428	gotsig = 1;
		1429	#if EV_ASYNC_ENABLE
		1430	gotasync = 1;
		1431	#endif
821		1432
822	ev_ref (EV_A);	1433	ev_ref (EV_A);
823	ev_io_stop (EV_A_ &sigev);	1434	ev_io_stop (EV_A_ &pipeev);
		1435
		1436	#if EV_USE_EVENTFD
		1437	if (evfd >= 0)
		1438	close (evfd);
		1439	#endif
		1440
		1441	if (evpipe [0] >= 0)
		1442	{
824	close (sigpipe [0]);	1443	close (evpipe [0]);
825	close (sigpipe [1]);	1444	close (evpipe [1]);
		1445	}
826		1446
827	while (pipe (sigpipe))
828	syserr ("(libev) error creating pipe");
829
830	siginit (EV_A);	1447	evpipe_init (EV_A);
		1448	/* now iterate over everything, in case we missed something */
		1449	pipecb (EV_A_ &pipeev, EV_READ);
831	}	1450	}
832		1451
833	postfork = 0;	1452	postfork = 0;
834	}	1453	}
835		1454
836	#if EV_MULTIPLICITY	1455	#if EV_MULTIPLICITY
837	struct ev_loop *	1456	struct ev_loop *
838	ev_loop_new (int methods)	1457	ev_loop_new (unsigned int flags)
839	{	1458	{
840	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1459	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
841		1460
842	memset (loop, 0, sizeof (struct ev_loop));	1461	memset (loop, 0, sizeof (struct ev_loop));
843		1462
844	loop_init (EV_A_ methods);	1463	loop_init (EV_A_ flags);
845		1464
846	if (ev_method (EV_A))	1465	if (ev_backend (EV_A))
847	return loop;	1466	return loop;
848		1467
849	return 0;	1468	return 0;
850	}	1469	}
851		1470
…		…
857	}	1476	}
858		1477
859	void	1478	void
860	ev_loop_fork (EV_P)	1479	ev_loop_fork (EV_P)
861	{	1480	{
862	postfork = 1;	1481	postfork = 1; /* must be in line with ev_default_fork */
863	}	1482	}
864
865	#endif	1483	#endif
866		1484
867	#if EV_MULTIPLICITY	1485	#if EV_MULTIPLICITY
868	struct ev_loop *	1486	struct ev_loop *
		1487	ev_default_loop_init (unsigned int flags)
869	#else	1488	#else
870	int	1489	int
		1490	ev_default_loop (unsigned int flags)
871	#endif	1491	#endif
872	ev_default_loop (int methods)
873	{	1492	{
874	if (sigpipe [0] == sigpipe [1])
875	if (pipe (sigpipe))
876	return 0;
877
878	if (!default_loop)	1493	if (!ev_default_loop_ptr)
879	{	1494	{
880	#if EV_MULTIPLICITY	1495	#if EV_MULTIPLICITY
881	struct ev_loop *loop = default_loop = &default_loop_struct;	1496	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
882	#else	1497	#else
883	default_loop = 1;	1498	ev_default_loop_ptr = 1;
884	#endif	1499	#endif
885		1500
886	loop_init (EV_A_ methods);	1501	loop_init (EV_A_ flags);
887		1502
888	if (ev_method (EV_A))	1503	if (ev_backend (EV_A))
889	{	1504	{
890	siginit (EV_A);
891
892	#ifndef WIN32	1505	#ifndef _WIN32
893	ev_signal_init (&childev, childcb, SIGCHLD);	1506	ev_signal_init (&childev, childcb, SIGCHLD);
894	ev_set_priority (&childev, EV_MAXPRI);	1507	ev_set_priority (&childev, EV_MAXPRI);
895	ev_signal_start (EV_A_ &childev);	1508	ev_signal_start (EV_A_ &childev);
896	ev_unref (EV_A); /* child watcher should not keep loop alive */	1509	ev_unref (EV_A); /* child watcher should not keep loop alive */
897	#endif	1510	#endif
898	}	1511	}
899	else	1512	else
900	default_loop = 0;	1513	ev_default_loop_ptr = 0;
901	}	1514	}
902		1515
903	return default_loop;	1516	return ev_default_loop_ptr;
904	}	1517	}
905		1518
906	void	1519	void
907	ev_default_destroy (void)	1520	ev_default_destroy (void)
908	{	1521	{
909	#if EV_MULTIPLICITY	1522	#if EV_MULTIPLICITY
910	struct ev_loop *loop = default_loop;	1523	struct ev_loop *loop = ev_default_loop_ptr;
911	#endif	1524	#endif
912		1525
913	#ifndef WIN32	1526	#ifndef _WIN32
914	ev_ref (EV_A); /* child watcher */	1527	ev_ref (EV_A); /* child watcher */
915	ev_signal_stop (EV_A_ &childev);	1528	ev_signal_stop (EV_A_ &childev);
916	#endif	1529	#endif
917		1530
918	ev_ref (EV_A); /* signal watcher */
919	ev_io_stop (EV_A_ &sigev);
920
921	close (sigpipe [0]); sigpipe [0] = 0;
922	close (sigpipe [1]); sigpipe [1] = 0;
923
924	loop_destroy (EV_A);	1531	loop_destroy (EV_A);
925	}	1532	}
926		1533
927	void	1534	void
928	ev_default_fork (void)	1535	ev_default_fork (void)
929	{	1536	{
930	#if EV_MULTIPLICITY	1537	#if EV_MULTIPLICITY
931	struct ev_loop *loop = default_loop;	1538	struct ev_loop *loop = ev_default_loop_ptr;
932	#endif	1539	#endif
933		1540
934	if (method)	1541	if (backend)
935	postfork = 1;	1542	postfork = 1; /* must be in line with ev_loop_fork */
936	}	1543	}
937		1544
938	/*****************************************************************************/	1545	/*****************************************************************************/
939		1546
940	static int	1547	void
941	any_pending (EV_P)	1548	ev_invoke (EV_P_ void *w, int revents)
942	{	1549	{
943	int pri;	1550	EV_CB_INVOKE ((W)w, revents);
944
945	for (pri = NUMPRI; pri--; )
946	if (pendingcnt [pri])
947	return 1;
948
949	return 0;
950	}	1551	}
951		1552
952	static void	1553	void inline_speed
953	call_pending (EV_P)	1554	call_pending (EV_P)
954	{	1555	{
955	int pri;	1556	int pri;
956		1557
957	for (pri = NUMPRI; pri--; )	1558	for (pri = NUMPRI; pri--; )
958	while (pendingcnt [pri])	1559	while (pendingcnt [pri])
959	{	1560	{
960	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1561	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
961		1562
962	if (p->w)	1563	if (expect_true (p->w))
963	{	1564	{
		1565	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1566
964	p->w->pending = 0;	1567	p->w->pending = 0;
965	EV_CB_INVOKE (p->w, p->events);	1568	EV_CB_INVOKE (p->w, p->events);
966	}	1569	}
967	}	1570	}
968	}	1571	}
969		1572
970	static void	1573	#if EV_IDLE_ENABLE
		1574	void inline_size
		1575	idle_reify (EV_P)
		1576	{
		1577	if (expect_false (idleall))
		1578	{
		1579	int pri;
		1580
		1581	for (pri = NUMPRI; pri--; )
		1582	{
		1583	if (pendingcnt [pri])
		1584	break;
		1585
		1586	if (idlecnt [pri])
		1587	{
		1588	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1589	break;
		1590	}
		1591	}
		1592	}
		1593	}
		1594	#endif
		1595
		1596	void inline_size
971	timers_reify (EV_P)	1597	timers_reify (EV_P)
972	{	1598	{
973	while (timercnt && ((WT)timers [0])->at <= mn_now)	1599	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
974	{	1600	{
975	struct ev_timer *w = timers [0];	1601	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
976		1602
977	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1603	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
978		1604
979	/* first reschedule or stop timer */	1605	/* first reschedule or stop timer */
980	if (w->repeat)	1606	if (w->repeat)
981	{	1607	{
982	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1608	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
983	((WT)w)->at = mn_now + w->repeat;	1609
		1610	ev_at (w) += w->repeat;
		1611	if (ev_at (w) < mn_now)
		1612	ev_at (w) = mn_now;
		1613
984	downheap ((WT *)timers, timercnt, 0);	1614	downheap (timers, timercnt, HEAP0);
985	}	1615	}
986	else	1616	else
987	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1617	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
988		1618
989	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1619	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
990	}	1620	}
991	}	1621	}
992		1622
993	static void	1623	#if EV_PERIODIC_ENABLE
		1624	void inline_size
994	periodics_reify (EV_P)	1625	periodics_reify (EV_P)
995	{	1626	{
996	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1627	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
997	{	1628	{
998	struct ev_periodic *w = periodics [0];	1629	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
999		1630
1000	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1631	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1001		1632
1002	/* first reschedule or stop timer */	1633	/* first reschedule or stop timer */
1003	if (w->reschedule_cb)	1634	if (w->reschedule_cb)
1004	{	1635	{
1005	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);	1636	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1006
1007	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));	1637	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1008	downheap ((WT *)periodics, periodiccnt, 0);	1638	downheap (periodics, periodiccnt, 1);
1009	}	1639	}
1010	else if (w->interval)	1640	else if (w->interval)
1011	{	1641	{
1012	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1642	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1643	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1013	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1644	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1014	downheap ((WT *)periodics, periodiccnt, 0);	1645	downheap (periodics, periodiccnt, HEAP0);
1015	}	1646	}
1016	else	1647	else
1017	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1648	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1018		1649
1019	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1650	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1020	}	1651	}
1021	}	1652	}
1022		1653
1023	static void	1654	static void noinline
1024	periodics_reschedule (EV_P)	1655	periodics_reschedule (EV_P)
1025	{	1656	{
1026	int i;	1657	int i;
1027		1658
1028	/* adjust periodics after time jump */	1659	/* adjust periodics after time jump */
1029	for (i = 0; i < periodiccnt; ++i)	1660	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1030	{	1661	{
1031	struct ev_periodic *w = periodics [i];	1662	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1032		1663
1033	if (w->reschedule_cb)	1664	if (w->reschedule_cb)
1034	((WT)w)->at = w->reschedule_cb (w, rt_now);	1665	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1035	else if (w->interval)	1666	else if (w->interval)
1036	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1667	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1037	}	1668	}
1038		1669
1039	/* now rebuild the heap */	1670	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
1040	for (i = periodiccnt >> 1; i--; )	1671	for (i = periodiccnt >> 1; --i; )
1041	downheap ((WT *)periodics, periodiccnt, i);	1672	downheap (periodics, periodiccnt, i + HEAP0);
1042	}	1673	}
		1674	#endif
1043		1675
1044	inline int	1676	void inline_speed
1045	time_update_monotonic (EV_P)	1677	time_update (EV_P_ ev_tstamp max_block)
1046	{
1047	mn_now = get_clock ();
1048
1049	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1050	{
1051	rt_now = rtmn_diff + mn_now;
1052	return 0;
1053	}
1054	else
1055	{
1056	now_floor = mn_now;
1057	rt_now = ev_time ();
1058	return 1;
1059	}
1060	}
1061
1062	static void
1063	time_update (EV_P)
1064	{	1678	{
1065	int i;	1679	int i;
1066		1680
1067	#if EV_USE_MONOTONIC	1681	#if EV_USE_MONOTONIC
1068	if (expect_true (have_monotonic))	1682	if (expect_true (have_monotonic))
1069	{	1683	{
1070	if (time_update_monotonic (EV_A))	1684	ev_tstamp odiff = rtmn_diff;
		1685
		1686	mn_now = get_clock ();
		1687
		1688	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1689	/* interpolate in the meantime */
		1690	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1071	{	1691	{
1072	ev_tstamp odiff = rtmn_diff;	1692	ev_rt_now = rtmn_diff + mn_now;
		1693	return;
		1694	}
1073		1695
		1696	now_floor = mn_now;
		1697	ev_rt_now = ev_time ();
		1698
1074	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1699	/* loop a few times, before making important decisions.
		1700	* on the choice of "4": one iteration isn't enough,
		1701	* in case we get preempted during the calls to
		1702	* ev_time and get_clock. a second call is almost guaranteed
		1703	* to succeed in that case, though. and looping a few more times
		1704	* doesn't hurt either as we only do this on time-jumps or
		1705	* in the unlikely event of having been preempted here.
		1706	*/
		1707	for (i = 4; --i; )
		1708	{
		1709	rtmn_diff = ev_rt_now - mn_now;
		1710
		1711	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1712	return; /* all is well */
		1713
		1714	ev_rt_now = ev_time ();
		1715	mn_now = get_clock ();
		1716	now_floor = mn_now;
		1717	}
		1718
		1719	# if EV_PERIODIC_ENABLE
		1720	periodics_reschedule (EV_A);
		1721	# endif
		1722	/* no timer adjustment, as the monotonic clock doesn't jump */
		1723	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1724	}
		1725	else
		1726	#endif
		1727	{
		1728	ev_rt_now = ev_time ();
		1729
		1730	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1731	{
		1732	#if EV_PERIODIC_ENABLE
		1733	periodics_reschedule (EV_A);
		1734	#endif
		1735	/* adjust timers. this is easy, as the offset is the same for all of them */
		1736	for (i = 0; i < timercnt; ++i)
1075	{	1737	{
1076	rtmn_diff = rt_now - mn_now;	1738	ANHE *he = timers + i + HEAP0;
1077		1739	ANHE_w (*he)->at += ev_rt_now - mn_now;
1078	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1740	ANHE_at_set (*he);
1079	return; /* all is well */
1080
1081	rt_now = ev_time ();
1082	mn_now = get_clock ();
1083	now_floor = mn_now;
1084	}	1741	}
1085
1086	periodics_reschedule (EV_A);
1087	/* no timer adjustment, as the monotonic clock doesn't jump */
1088	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1089	}	1742	}
1090	}
1091	else
1092	#endif
1093	{
1094	rt_now = ev_time ();
1095		1743
1096	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1097	{
1098	periodics_reschedule (EV_A);
1099
1100	/* adjust timers. this is easy, as the offset is the same for all */
1101	for (i = 0; i < timercnt; ++i)
1102	((WT)timers [i])->at += rt_now - mn_now;
1103	}
1104
1105	mn_now = rt_now;	1744	mn_now = ev_rt_now;
1106	}	1745	}
1107	}	1746	}
1108		1747
1109	void	1748	void
1110	ev_ref (EV_P)	1749	ev_ref (EV_P)
…		…
1121	static int loop_done;	1760	static int loop_done;
1122		1761
1123	void	1762	void
1124	ev_loop (EV_P_ int flags)	1763	ev_loop (EV_P_ int flags)
1125	{	1764	{
1126	double block;	1765	loop_done = EVUNLOOP_CANCEL;
1127	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1766
		1767	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1128		1768
1129	do	1769	do
1130	{	1770	{
		1771	#ifndef _WIN32
		1772	if (expect_false (curpid)) /* penalise the forking check even more */
		1773	if (expect_false (getpid () != curpid))
		1774	{
		1775	curpid = getpid ();
		1776	postfork = 1;
		1777	}
		1778	#endif
		1779
		1780	#if EV_FORK_ENABLE
		1781	/* we might have forked, so queue fork handlers */
		1782	if (expect_false (postfork))
		1783	if (forkcnt)
		1784	{
		1785	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1786	call_pending (EV_A);
		1787	}
		1788	#endif
		1789
1131	/* queue check watchers (and execute them) */	1790	/* queue prepare watchers (and execute them) */
1132	if (expect_false (preparecnt))	1791	if (expect_false (preparecnt))
1133	{	1792	{
1134	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1793	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1135	call_pending (EV_A);	1794	call_pending (EV_A);
1136	}	1795	}
1137		1796
		1797	if (expect_false (!activecnt))
		1798	break;
		1799
1138	/* we might have forked, so reify kernel state if necessary */	1800	/* we might have forked, so reify kernel state if necessary */
1139	if (expect_false (postfork))	1801	if (expect_false (postfork))
1140	loop_fork (EV_A);	1802	loop_fork (EV_A);
1141		1803
1142	/* update fd-related kernel structures */	1804	/* update fd-related kernel structures */
1143	fd_reify (EV_A);	1805	fd_reify (EV_A);
1144		1806
1145	/* calculate blocking time */	1807	/* calculate blocking time */
		1808	{
		1809	ev_tstamp waittime = 0.;
		1810	ev_tstamp sleeptime = 0.;
1146		1811
1147	/* we only need this for !monotonic clock or timers, but as we basically	1812	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1148	always have timers, we just calculate it always */
1149	#if EV_USE_MONOTONIC
1150	if (expect_true (have_monotonic))
1151	time_update_monotonic (EV_A);
1152	else
1153	#endif
1154	{	1813	{
1155	rt_now = ev_time ();	1814	/* update time to cancel out callback processing overhead */
1156	mn_now = rt_now;	1815	time_update (EV_A_ 1e100);
1157	}
1158		1816
1159	if (flags & EVLOOP_NONBLOCK || idlecnt)
1160	block = 0.;
1161	else
1162	{
1163	block = MAX_BLOCKTIME;	1817	waittime = MAX_BLOCKTIME;
1164		1818
1165	if (timercnt)	1819	if (timercnt)
1166	{	1820	{
1167	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1821	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1168	if (block > to) block = to;	1822	if (waittime > to) waittime = to;
1169	}	1823	}
1170		1824
		1825	#if EV_PERIODIC_ENABLE
1171	if (periodiccnt)	1826	if (periodiccnt)
1172	{	1827	{
1173	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1828	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1174	if (block > to) block = to;	1829	if (waittime > to) waittime = to;
1175	}	1830	}
		1831	#endif
1176		1832
1177	if (block < 0.) block = 0.;	1833	if (expect_false (waittime < timeout_blocktime))
		1834	waittime = timeout_blocktime;
		1835
		1836	sleeptime = waittime - backend_fudge;
		1837
		1838	if (expect_true (sleeptime > io_blocktime))
		1839	sleeptime = io_blocktime;
		1840
		1841	if (sleeptime)
		1842	{
		1843	ev_sleep (sleeptime);
		1844	waittime -= sleeptime;
		1845	}
1178	}	1846	}
1179		1847
1180	method_poll (EV_A_ block);	1848	++loop_count;
		1849	backend_poll (EV_A_ waittime);
1181		1850
1182	/* update rt_now, do magic */	1851	/* update ev_rt_now, do magic */
1183	time_update (EV_A);	1852	time_update (EV_A_ waittime + sleeptime);
		1853	}
1184		1854
1185	/* queue pending timers and reschedule them */	1855	/* queue pending timers and reschedule them */
1186	timers_reify (EV_A); /* relative timers called last */	1856	timers_reify (EV_A); /* relative timers called last */
		1857	#if EV_PERIODIC_ENABLE
1187	periodics_reify (EV_A); /* absolute timers called first */	1858	periodics_reify (EV_A); /* absolute timers called first */
		1859	#endif
1188		1860
		1861	#if EV_IDLE_ENABLE
1189	/* queue idle watchers unless io or timers are pending */	1862	/* queue idle watchers unless other events are pending */
1190	if (idlecnt && !any_pending (EV_A))	1863	idle_reify (EV_A);
1191	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1864	#endif
1192		1865
1193	/* queue check watchers, to be executed first */	1866	/* queue check watchers, to be executed first */
1194	if (checkcnt)	1867	if (expect_false (checkcnt))
1195	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1868	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1196		1869
1197	call_pending (EV_A);	1870	call_pending (EV_A);
1198	}	1871	}
1199	while (activecnt && !loop_done);	1872	while (expect_true (
		1873	activecnt
		1874	&& !loop_done
		1875	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1876	));
1200		1877
1201	if (loop_done != 2)	1878	if (loop_done == EVUNLOOP_ONE)
1202	loop_done = 0;	1879	loop_done = EVUNLOOP_CANCEL;
1203	}	1880	}
1204		1881
1205	void	1882	void
1206	ev_unloop (EV_P_ int how)	1883	ev_unloop (EV_P_ int how)
1207	{	1884	{
1208	loop_done = how;	1885	loop_done = how;
1209	}	1886	}
1210		1887
1211	/*****************************************************************************/	1888	/*****************************************************************************/
1212		1889
1213	inline void	1890	void inline_size
1214	wlist_add (WL *head, WL elem)	1891	wlist_add (WL *head, WL elem)
1215	{	1892	{
1216	elem->next = *head;	1893	elem->next = *head;
1217	*head = elem;	1894	*head = elem;
1218	}	1895	}
1219		1896
1220	inline void	1897	void inline_size
1221	wlist_del (WL *head, WL elem)	1898	wlist_del (WL *head, WL elem)
1222	{	1899	{
1223	while (*head)	1900	while (*head)
1224	{	1901	{
1225	if (*head == elem)	1902	if (*head == elem)
…		…
1230		1907
1231	head = &(*head)->next;	1908	head = &(*head)->next;
1232	}	1909	}
1233	}	1910	}
1234		1911
1235	inline void	1912	void inline_speed
1236	ev_clear_pending (EV_P_ W w)	1913	clear_pending (EV_P_ W w)
1237	{	1914	{
1238	if (w->pending)	1915	if (w->pending)
1239	{	1916	{
1240	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1917	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1241	w->pending = 0;	1918	w->pending = 0;
1242	}	1919	}
1243	}	1920	}
1244		1921
1245	inline void	1922	int
		1923	ev_clear_pending (EV_P_ void *w)
		1924	{
		1925	W w_ = (W)w;
		1926	int pending = w_->pending;
		1927
		1928	if (expect_true (pending))
		1929	{
		1930	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1931	w_->pending = 0;
		1932	p->w = 0;
		1933	return p->events;
		1934	}
		1935	else
		1936	return 0;
		1937	}
		1938
		1939	void inline_size
		1940	pri_adjust (EV_P_ W w)
		1941	{
		1942	int pri = w->priority;
		1943	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1944	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1945	w->priority = pri;
		1946	}
		1947
		1948	void inline_speed
1246	ev_start (EV_P_ W w, int active)	1949	ev_start (EV_P_ W w, int active)
1247	{	1950	{
1248	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1951	pri_adjust (EV_A_ w);
1249	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1250
1251	w->active = active;	1952	w->active = active;
1252	ev_ref (EV_A);	1953	ev_ref (EV_A);
1253	}	1954	}
1254		1955
1255	inline void	1956	void inline_size
1256	ev_stop (EV_P_ W w)	1957	ev_stop (EV_P_ W w)
1257	{	1958	{
1258	ev_unref (EV_A);	1959	ev_unref (EV_A);
1259	w->active = 0;	1960	w->active = 0;
1260	}	1961	}
1261		1962
1262	/*****************************************************************************/	1963	/*****************************************************************************/
1263		1964
1264	void	1965	void noinline
1265	ev_io_start (EV_P_ struct ev_io *w)	1966	ev_io_start (EV_P_ ev_io *w)
1266	{	1967	{
1267	int fd = w->fd;	1968	int fd = w->fd;
1268		1969
1269	if (ev_is_active (w))	1970	if (expect_false (ev_is_active (w)))
1270	return;	1971	return;
1271		1972
1272	assert (("ev_io_start called with negative fd", fd >= 0));	1973	assert (("ev_io_start called with negative fd", fd >= 0));
1273		1974
1274	ev_start (EV_A_ (W)w, 1);	1975	ev_start (EV_A_ (W)w, 1);
1275	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1976	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1276	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1977	wlist_add (&anfds[fd].head, (WL)w);
1277		1978
1278	fd_change (EV_A_ fd);	1979	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1980	w->events &= ~EV_IOFDSET;
1279	}	1981	}
1280		1982
1281	void	1983	void noinline
1282	ev_io_stop (EV_P_ struct ev_io *w)	1984	ev_io_stop (EV_P_ ev_io *w)
1283	{	1985	{
1284	ev_clear_pending (EV_A_ (W)w);	1986	clear_pending (EV_A_ (W)w);
1285	if (!ev_is_active (w))	1987	if (expect_false (!ev_is_active (w)))
1286	return;	1988	return;
1287		1989
		1990	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1991
1288	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1992	wlist_del (&anfds[w->fd].head, (WL)w);
1289	ev_stop (EV_A_ (W)w);	1993	ev_stop (EV_A_ (W)w);
1290		1994
1291	fd_change (EV_A_ w->fd);	1995	fd_change (EV_A_ w->fd, 1);
1292	}	1996	}
1293		1997
1294	void	1998	void noinline
1295	ev_timer_start (EV_P_ struct ev_timer *w)	1999	ev_timer_start (EV_P_ ev_timer *w)
		2000	{
		2001	if (expect_false (ev_is_active (w)))
		2002	return;
		2003
		2004	ev_at (w) += mn_now;
		2005
		2006	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		2007
		2008	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
		2009	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
		2010	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2011	ANHE_at_set (timers [ev_active (w)]);
		2012	upheap (timers, ev_active (w));
		2013
		2014	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		2015	}
		2016
		2017	void noinline
		2018	ev_timer_stop (EV_P_ ev_timer *w)
		2019	{
		2020	clear_pending (EV_A_ (W)w);
		2021	if (expect_false (!ev_is_active (w)))
		2022	return;
		2023
		2024	{
		2025	int active = ev_active (w);
		2026
		2027	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2028
		2029	if (expect_true (active < timercnt + HEAP0 - 1))
		2030	{
		2031	timers [active] = timers [timercnt + HEAP0 - 1];
		2032	adjustheap (timers, timercnt, active);
		2033	}
		2034
		2035	--timercnt;
		2036	}
		2037
		2038	ev_at (w) -= mn_now;
		2039
		2040	ev_stop (EV_A_ (W)w);
		2041	}
		2042
		2043	void noinline
		2044	ev_timer_again (EV_P_ ev_timer *w)
1296	{	2045	{
1297	if (ev_is_active (w))	2046	if (ev_is_active (w))
1298	return;
1299
1300	((WT)w)->at += mn_now;
1301
1302	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1303
1304	ev_start (EV_A_ (W)w, ++timercnt);
1305	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1306	timers [timercnt - 1] = w;
1307	upheap ((WT *)timers, timercnt - 1);
1308
1309	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1310	}
1311
1312	void
1313	ev_timer_stop (EV_P_ struct ev_timer *w)
1314	{
1315	ev_clear_pending (EV_A_ (W)w);
1316	if (!ev_is_active (w))
1317	return;
1318
1319	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1320
1321	if (((W)w)->active < timercnt--)
1322	{
1323	timers [((W)w)->active - 1] = timers [timercnt];
1324	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1325	}
1326
1327	((WT)w)->at = w->repeat;
1328
1329	ev_stop (EV_A_ (W)w);
1330	}
1331
1332	void
1333	ev_timer_again (EV_P_ struct ev_timer *w)
1334	{
1335	if (ev_is_active (w))
1336	{	2047	{
1337	if (w->repeat)	2048	if (w->repeat)
1338	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);	2049	{
		2050	ev_at (w) = mn_now + w->repeat;
		2051	ANHE_at_set (timers [ev_active (w)]);
		2052	adjustheap (timers, timercnt, ev_active (w));
		2053	}
1339	else	2054	else
1340	ev_timer_stop (EV_A_ w);	2055	ev_timer_stop (EV_A_ w);
1341	}	2056	}
1342	else if (w->repeat)	2057	else if (w->repeat)
		2058	{
		2059	ev_at (w) = w->repeat;
1343	ev_timer_start (EV_A_ w);	2060	ev_timer_start (EV_A_ w);
		2061	}
1344	}	2062	}
1345		2063
1346	void	2064	#if EV_PERIODIC_ENABLE
		2065	void noinline
1347	ev_periodic_start (EV_P_ struct ev_periodic *w)	2066	ev_periodic_start (EV_P_ ev_periodic *w)
1348	{	2067	{
1349	if (ev_is_active (w))	2068	if (expect_false (ev_is_active (w)))
1350	return;	2069	return;
1351		2070
1352	if (w->reschedule_cb)	2071	if (w->reschedule_cb)
1353	((WT)w)->at = w->reschedule_cb (w, rt_now);	2072	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1354	else if (w->interval)	2073	else if (w->interval)
1355	{	2074	{
1356	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2075	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1357	/* this formula differs from the one in periodic_reify because we do not always round up */	2076	/* this formula differs from the one in periodic_reify because we do not always round up */
1358	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	2077	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1359	}	2078	}
		2079	else
		2080	ev_at (w) = w->offset;
1360		2081
1361	ev_start (EV_A_ (W)w, ++periodiccnt);	2082	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1362	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));	2083	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1363	periodics [periodiccnt - 1] = w;	2084	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1364	upheap ((WT *)periodics, periodiccnt - 1);	2085	upheap (periodics, ev_active (w));
1365		2086
1366	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2087	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1367	}	2088	}
1368		2089
1369	void	2090	void noinline
1370	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2091	ev_periodic_stop (EV_P_ ev_periodic *w)
1371	{	2092	{
1372	ev_clear_pending (EV_A_ (W)w);	2093	clear_pending (EV_A_ (W)w);
1373	if (!ev_is_active (w))	2094	if (expect_false (!ev_is_active (w)))
1374	return;	2095	return;
1375		2096
		2097	{
		2098	int active = ev_active (w);
		2099
1376	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2100	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1377		2101
1378	if (((W)w)->active < periodiccnt--)	2102	if (expect_true (active < periodiccnt + HEAP0 - 1))
1379	{	2103	{
1380	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2104	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1381	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2105	adjustheap (periodics, periodiccnt, active);
1382	}	2106	}
		2107
		2108	--periodiccnt;
		2109	}
1383		2110
1384	ev_stop (EV_A_ (W)w);	2111	ev_stop (EV_A_ (W)w);
1385	}	2112	}
1386		2113
1387	void	2114	void noinline
1388	ev_periodic_again (EV_P_ struct ev_periodic *w)	2115	ev_periodic_again (EV_P_ ev_periodic *w)
1389	{	2116	{
1390	/* TODO: use adjustheap and recalculation */	2117	/* TODO: use adjustheap and recalculation */
1391	ev_periodic_stop (EV_A_ w);	2118	ev_periodic_stop (EV_A_ w);
1392	ev_periodic_start (EV_A_ w);	2119	ev_periodic_start (EV_A_ w);
1393	}	2120	}
1394		2121	#endif
1395	void
1396	ev_idle_start (EV_P_ struct ev_idle *w)
1397	{
1398	if (ev_is_active (w))
1399	return;
1400
1401	ev_start (EV_A_ (W)w, ++idlecnt);
1402	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1403	idles [idlecnt - 1] = w;
1404	}
1405
1406	void
1407	ev_idle_stop (EV_P_ struct ev_idle *w)
1408	{
1409	ev_clear_pending (EV_A_ (W)w);
1410	if (ev_is_active (w))
1411	return;
1412
1413	idles [((W)w)->active - 1] = idles [--idlecnt];
1414	ev_stop (EV_A_ (W)w);
1415	}
1416
1417	void
1418	ev_prepare_start (EV_P_ struct ev_prepare *w)
1419	{
1420	if (ev_is_active (w))
1421	return;
1422
1423	ev_start (EV_A_ (W)w, ++preparecnt);
1424	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1425	prepares [preparecnt - 1] = w;
1426	}
1427
1428	void
1429	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1430	{
1431	ev_clear_pending (EV_A_ (W)w);
1432	if (ev_is_active (w))
1433	return;
1434
1435	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1436	ev_stop (EV_A_ (W)w);
1437	}
1438
1439	void
1440	ev_check_start (EV_P_ struct ev_check *w)
1441	{
1442	if (ev_is_active (w))
1443	return;
1444
1445	ev_start (EV_A_ (W)w, ++checkcnt);
1446	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1447	checks [checkcnt - 1] = w;
1448	}
1449
1450	void
1451	ev_check_stop (EV_P_ struct ev_check *w)
1452	{
1453	ev_clear_pending (EV_A_ (W)w);
1454	if (ev_is_active (w))
1455	return;
1456
1457	checks [((W)w)->active - 1] = checks [--checkcnt];
1458	ev_stop (EV_A_ (W)w);
1459	}
1460		2122
1461	#ifndef SA_RESTART	2123	#ifndef SA_RESTART
1462	# define SA_RESTART 0	2124	# define SA_RESTART 0
1463	#endif	2125	#endif
1464		2126
1465	void	2127	void noinline
1466	ev_signal_start (EV_P_ struct ev_signal *w)	2128	ev_signal_start (EV_P_ ev_signal *w)
1467	{	2129	{
1468	#if EV_MULTIPLICITY	2130	#if EV_MULTIPLICITY
1469	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2131	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1470	#endif	2132	#endif
1471	if (ev_is_active (w))	2133	if (expect_false (ev_is_active (w)))
1472	return;	2134	return;
1473		2135
1474	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2136	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1475		2137
		2138	evpipe_init (EV_A);
		2139
		2140	{
		2141	#ifndef _WIN32
		2142	sigset_t full, prev;
		2143	sigfillset (&full);
		2144	sigprocmask (SIG_SETMASK, &full, &prev);
		2145	#endif
		2146
		2147	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2148
		2149	#ifndef _WIN32
		2150	sigprocmask (SIG_SETMASK, &prev, 0);
		2151	#endif
		2152	}
		2153
1476	ev_start (EV_A_ (W)w, 1);	2154	ev_start (EV_A_ (W)w, 1);
1477	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1478	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2155	wlist_add (&signals [w->signum - 1].head, (WL)w);
1479		2156
1480	if (!((WL)w)->next)	2157	if (!((WL)w)->next)
1481	{	2158	{
1482	#if WIN32	2159	#if _WIN32
1483	signal (w->signum, sighandler);	2160	signal (w->signum, ev_sighandler);
1484	#else	2161	#else
1485	struct sigaction sa;	2162	struct sigaction sa;
1486	sa.sa_handler = sighandler;	2163	sa.sa_handler = ev_sighandler;
1487	sigfillset (&sa.sa_mask);	2164	sigfillset (&sa.sa_mask);
1488	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2165	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1489	sigaction (w->signum, &sa, 0);	2166	sigaction (w->signum, &sa, 0);
1490	#endif	2167	#endif
1491	}	2168	}
1492	}	2169	}
1493		2170
1494	void	2171	void noinline
1495	ev_signal_stop (EV_P_ struct ev_signal *w)	2172	ev_signal_stop (EV_P_ ev_signal *w)
1496	{	2173	{
1497	ev_clear_pending (EV_A_ (W)w);	2174	clear_pending (EV_A_ (W)w);
1498	if (!ev_is_active (w))	2175	if (expect_false (!ev_is_active (w)))
1499	return;	2176	return;
1500		2177
1501	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2178	wlist_del (&signals [w->signum - 1].head, (WL)w);
1502	ev_stop (EV_A_ (W)w);	2179	ev_stop (EV_A_ (W)w);
1503		2180
1504	if (!signals [w->signum - 1].head)	2181	if (!signals [w->signum - 1].head)
1505	signal (w->signum, SIG_DFL);	2182	signal (w->signum, SIG_DFL);
1506	}	2183	}
1507		2184
1508	void	2185	void
1509	ev_child_start (EV_P_ struct ev_child *w)	2186	ev_child_start (EV_P_ ev_child *w)
1510	{	2187	{
1511	#if EV_MULTIPLICITY	2188	#if EV_MULTIPLICITY
1512	assert (("child watchers are only supported in the default loop", loop == default_loop));	2189	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1513	#endif	2190	#endif
1514	if (ev_is_active (w))	2191	if (expect_false (ev_is_active (w)))
1515	return;	2192	return;
1516		2193
1517	ev_start (EV_A_ (W)w, 1);	2194	ev_start (EV_A_ (W)w, 1);
1518	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2195	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1519	}	2196	}
1520		2197
1521	void	2198	void
1522	ev_child_stop (EV_P_ struct ev_child *w)	2199	ev_child_stop (EV_P_ ev_child *w)
1523	{	2200	{
1524	ev_clear_pending (EV_A_ (W)w);	2201	clear_pending (EV_A_ (W)w);
1525	if (ev_is_active (w))	2202	if (expect_false (!ev_is_active (w)))
1526	return;	2203	return;
1527		2204
1528	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2205	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1529	ev_stop (EV_A_ (W)w);	2206	ev_stop (EV_A_ (W)w);
1530	}	2207	}
1531		2208
		2209	#if EV_STAT_ENABLE
		2210
		2211	# ifdef _WIN32
		2212	# undef lstat
		2213	# define lstat(a,b) _stati64 (a,b)
		2214	# endif
		2215
		2216	#define DEF_STAT_INTERVAL 5.0074891
		2217	#define MIN_STAT_INTERVAL 0.1074891
		2218
		2219	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2220
		2221	#if EV_USE_INOTIFY
		2222	# define EV_INOTIFY_BUFSIZE 8192
		2223
		2224	static void noinline
		2225	infy_add (EV_P_ ev_stat *w)
		2226	{
		2227	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);
		2228
		2229	if (w->wd < 0)
		2230	{
		2231	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2232
		2233	/* monitor some parent directory for speedup hints */
		2234	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2235	/* but an efficiency issue only */
		2236	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2237	{
		2238	char path [4096];
		2239	strcpy (path, w->path);
		2240
		2241	do
		2242	{
		2243	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2244	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2245
		2246	char *pend = strrchr (path, '/');
		2247
		2248	if (!pend)
		2249	break; /* whoops, no '/', complain to your admin */
		2250
		2251	*pend = 0;
		2252	w->wd = inotify_add_watch (fs_fd, path, mask);
		2253	}
		2254	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2255	}
		2256	}
		2257	else
		2258	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2259
		2260	if (w->wd >= 0)
		2261	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2262	}
		2263
		2264	static void noinline
		2265	infy_del (EV_P_ ev_stat *w)
		2266	{
		2267	int slot;
		2268	int wd = w->wd;
		2269
		2270	if (wd < 0)
		2271	return;
		2272
		2273	w->wd = -2;
		2274	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2275	wlist_del (&fs_hash [slot].head, (WL)w);
		2276
		2277	/* remove this watcher, if others are watching it, they will rearm */
		2278	inotify_rm_watch (fs_fd, wd);
		2279	}
		2280
		2281	static void noinline
		2282	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2283	{
		2284	if (slot < 0)
		2285	/* overflow, need to check for all hahs slots */
		2286	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2287	infy_wd (EV_A_ slot, wd, ev);
		2288	else
		2289	{
		2290	WL w_;
		2291
		2292	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2293	{
		2294	ev_stat *w = (ev_stat *)w_;
		2295	w_ = w_->next; /* lets us remove this watcher and all before it */
		2296
		2297	if (w->wd == wd || wd == -1)
		2298	{
		2299	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2300	{
		2301	w->wd = -1;
		2302	infy_add (EV_A_ w); /* re-add, no matter what */
		2303	}
		2304
		2305	stat_timer_cb (EV_A_ &w->timer, 0);
		2306	}
		2307	}
		2308	}
		2309	}
		2310
		2311	static void
		2312	infy_cb (EV_P_ ev_io *w, int revents)
		2313	{
		2314	char buf [EV_INOTIFY_BUFSIZE];
		2315	struct inotify_event *ev = (struct inotify_event *)buf;
		2316	int ofs;
		2317	int len = read (fs_fd, buf, sizeof (buf));
		2318
		2319	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2320	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2321	}
		2322
		2323	void inline_size
		2324	infy_init (EV_P)
		2325	{
		2326	if (fs_fd != -2)
		2327	return;
		2328
		2329	fs_fd = inotify_init ();
		2330
		2331	if (fs_fd >= 0)
		2332	{
		2333	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2334	ev_set_priority (&fs_w, EV_MAXPRI);
		2335	ev_io_start (EV_A_ &fs_w);
		2336	}
		2337	}
		2338
		2339	void inline_size
		2340	infy_fork (EV_P)
		2341	{
		2342	int slot;
		2343
		2344	if (fs_fd < 0)
		2345	return;
		2346
		2347	close (fs_fd);
		2348	fs_fd = inotify_init ();
		2349
		2350	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2351	{
		2352	WL w_ = fs_hash [slot].head;
		2353	fs_hash [slot].head = 0;
		2354
		2355	while (w_)
		2356	{
		2357	ev_stat *w = (ev_stat *)w_;
		2358	w_ = w_->next; /* lets us add this watcher */
		2359
		2360	w->wd = -1;
		2361
		2362	if (fs_fd >= 0)
		2363	infy_add (EV_A_ w); /* re-add, no matter what */
		2364	else
		2365	ev_timer_start (EV_A_ &w->timer);
		2366	}
		2367
		2368	}
		2369	}
		2370
		2371	#endif
		2372
		2373	void
		2374	ev_stat_stat (EV_P_ ev_stat *w)
		2375	{
		2376	if (lstat (w->path, &w->attr) < 0)
		2377	w->attr.st_nlink = 0;
		2378	else if (!w->attr.st_nlink)
		2379	w->attr.st_nlink = 1;
		2380	}
		2381
		2382	static void noinline
		2383	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2384	{
		2385	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2386
		2387	/* we copy this here each the time so that */
		2388	/* prev has the old value when the callback gets invoked */
		2389	w->prev = w->attr;
		2390	ev_stat_stat (EV_A_ w);
		2391
		2392	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2393	if (
		2394	w->prev.st_dev != w->attr.st_dev
		2395	|| w->prev.st_ino != w->attr.st_ino
		2396	|| w->prev.st_mode != w->attr.st_mode
		2397	|| w->prev.st_nlink != w->attr.st_nlink
		2398	|| w->prev.st_uid != w->attr.st_uid
		2399	|| w->prev.st_gid != w->attr.st_gid
		2400	|| w->prev.st_rdev != w->attr.st_rdev
		2401	|| w->prev.st_size != w->attr.st_size
		2402	|| w->prev.st_atime != w->attr.st_atime
		2403	|| w->prev.st_mtime != w->attr.st_mtime
		2404	|| w->prev.st_ctime != w->attr.st_ctime
		2405	) {
		2406	#if EV_USE_INOTIFY
		2407	infy_del (EV_A_ w);
		2408	infy_add (EV_A_ w);
		2409	ev_stat_stat (EV_A_ w); /* avoid race... */
		2410	#endif
		2411
		2412	ev_feed_event (EV_A_ w, EV_STAT);
		2413	}
		2414	}
		2415
		2416	void
		2417	ev_stat_start (EV_P_ ev_stat *w)
		2418	{
		2419	if (expect_false (ev_is_active (w)))
		2420	return;
		2421
		2422	/* since we use memcmp, we need to clear any padding data etc. */
		2423	memset (&w->prev, 0, sizeof (ev_statdata));
		2424	memset (&w->attr, 0, sizeof (ev_statdata));
		2425
		2426	ev_stat_stat (EV_A_ w);
		2427
		2428	if (w->interval < MIN_STAT_INTERVAL)
		2429	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2430
		2431	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2432	ev_set_priority (&w->timer, ev_priority (w));
		2433
		2434	#if EV_USE_INOTIFY
		2435	infy_init (EV_A);
		2436
		2437	if (fs_fd >= 0)
		2438	infy_add (EV_A_ w);
		2439	else
		2440	#endif
		2441	ev_timer_start (EV_A_ &w->timer);
		2442
		2443	ev_start (EV_A_ (W)w, 1);
		2444	}
		2445
		2446	void
		2447	ev_stat_stop (EV_P_ ev_stat *w)
		2448	{
		2449	clear_pending (EV_A_ (W)w);
		2450	if (expect_false (!ev_is_active (w)))
		2451	return;
		2452
		2453	#if EV_USE_INOTIFY
		2454	infy_del (EV_A_ w);
		2455	#endif
		2456	ev_timer_stop (EV_A_ &w->timer);
		2457
		2458	ev_stop (EV_A_ (W)w);
		2459	}
		2460	#endif
		2461
		2462	#if EV_IDLE_ENABLE
		2463	void
		2464	ev_idle_start (EV_P_ ev_idle *w)
		2465	{
		2466	if (expect_false (ev_is_active (w)))
		2467	return;
		2468
		2469	pri_adjust (EV_A_ (W)w);
		2470
		2471	{
		2472	int active = ++idlecnt [ABSPRI (w)];
		2473
		2474	++idleall;
		2475	ev_start (EV_A_ (W)w, active);
		2476
		2477	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2478	idles [ABSPRI (w)][active - 1] = w;
		2479	}
		2480	}
		2481
		2482	void
		2483	ev_idle_stop (EV_P_ ev_idle *w)
		2484	{
		2485	clear_pending (EV_A_ (W)w);
		2486	if (expect_false (!ev_is_active (w)))
		2487	return;
		2488
		2489	{
		2490	int active = ev_active (w);
		2491
		2492	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2493	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2494
		2495	ev_stop (EV_A_ (W)w);
		2496	--idleall;
		2497	}
		2498	}
		2499	#endif
		2500
		2501	void
		2502	ev_prepare_start (EV_P_ ev_prepare *w)
		2503	{
		2504	if (expect_false (ev_is_active (w)))
		2505	return;
		2506
		2507	ev_start (EV_A_ (W)w, ++preparecnt);
		2508	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2509	prepares [preparecnt - 1] = w;
		2510	}
		2511
		2512	void
		2513	ev_prepare_stop (EV_P_ ev_prepare *w)
		2514	{
		2515	clear_pending (EV_A_ (W)w);
		2516	if (expect_false (!ev_is_active (w)))
		2517	return;
		2518
		2519	{
		2520	int active = ev_active (w);
		2521
		2522	prepares [active - 1] = prepares [--preparecnt];
		2523	ev_active (prepares [active - 1]) = active;
		2524	}
		2525
		2526	ev_stop (EV_A_ (W)w);
		2527	}
		2528
		2529	void
		2530	ev_check_start (EV_P_ ev_check *w)
		2531	{
		2532	if (expect_false (ev_is_active (w)))
		2533	return;
		2534
		2535	ev_start (EV_A_ (W)w, ++checkcnt);
		2536	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2537	checks [checkcnt - 1] = w;
		2538	}
		2539
		2540	void
		2541	ev_check_stop (EV_P_ ev_check *w)
		2542	{
		2543	clear_pending (EV_A_ (W)w);
		2544	if (expect_false (!ev_is_active (w)))
		2545	return;
		2546
		2547	{
		2548	int active = ev_active (w);
		2549
		2550	checks [active - 1] = checks [--checkcnt];
		2551	ev_active (checks [active - 1]) = active;
		2552	}
		2553
		2554	ev_stop (EV_A_ (W)w);
		2555	}
		2556
		2557	#if EV_EMBED_ENABLE
		2558	void noinline
		2559	ev_embed_sweep (EV_P_ ev_embed *w)
		2560	{
		2561	ev_loop (w->other, EVLOOP_NONBLOCK);
		2562	}
		2563
		2564	static void
		2565	embed_io_cb (EV_P_ ev_io *io, int revents)
		2566	{
		2567	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2568
		2569	if (ev_cb (w))
		2570	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2571	else
		2572	ev_loop (w->other, EVLOOP_NONBLOCK);
		2573	}
		2574
		2575	static void
		2576	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2577	{
		2578	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2579
		2580	{
		2581	struct ev_loop *loop = w->other;
		2582
		2583	while (fdchangecnt)
		2584	{
		2585	fd_reify (EV_A);
		2586	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2587	}
		2588	}
		2589	}
		2590
		2591	#if 0
		2592	static void
		2593	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2594	{
		2595	ev_idle_stop (EV_A_ idle);
		2596	}
		2597	#endif
		2598
		2599	void
		2600	ev_embed_start (EV_P_ ev_embed *w)
		2601	{
		2602	if (expect_false (ev_is_active (w)))
		2603	return;
		2604
		2605	{
		2606	struct ev_loop *loop = w->other;
		2607	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2608	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2609	}
		2610
		2611	ev_set_priority (&w->io, ev_priority (w));
		2612	ev_io_start (EV_A_ &w->io);
		2613
		2614	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2615	ev_set_priority (&w->prepare, EV_MINPRI);
		2616	ev_prepare_start (EV_A_ &w->prepare);
		2617
		2618	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2619
		2620	ev_start (EV_A_ (W)w, 1);
		2621	}
		2622
		2623	void
		2624	ev_embed_stop (EV_P_ ev_embed *w)
		2625	{
		2626	clear_pending (EV_A_ (W)w);
		2627	if (expect_false (!ev_is_active (w)))
		2628	return;
		2629
		2630	ev_io_stop (EV_A_ &w->io);
		2631	ev_prepare_stop (EV_A_ &w->prepare);
		2632
		2633	ev_stop (EV_A_ (W)w);
		2634	}
		2635	#endif
		2636
		2637	#if EV_FORK_ENABLE
		2638	void
		2639	ev_fork_start (EV_P_ ev_fork *w)
		2640	{
		2641	if (expect_false (ev_is_active (w)))
		2642	return;
		2643
		2644	ev_start (EV_A_ (W)w, ++forkcnt);
		2645	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2646	forks [forkcnt - 1] = w;
		2647	}
		2648
		2649	void
		2650	ev_fork_stop (EV_P_ ev_fork *w)
		2651	{
		2652	clear_pending (EV_A_ (W)w);
		2653	if (expect_false (!ev_is_active (w)))
		2654	return;
		2655
		2656	{
		2657	int active = ev_active (w);
		2658
		2659	forks [active - 1] = forks [--forkcnt];
		2660	ev_active (forks [active - 1]) = active;
		2661	}
		2662
		2663	ev_stop (EV_A_ (W)w);
		2664	}
		2665	#endif
		2666
		2667	#if EV_ASYNC_ENABLE
		2668	void
		2669	ev_async_start (EV_P_ ev_async *w)
		2670	{
		2671	if (expect_false (ev_is_active (w)))
		2672	return;
		2673
		2674	evpipe_init (EV_A);
		2675
		2676	ev_start (EV_A_ (W)w, ++asynccnt);
		2677	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2678	asyncs [asynccnt - 1] = w;
		2679	}
		2680
		2681	void
		2682	ev_async_stop (EV_P_ ev_async *w)
		2683	{
		2684	clear_pending (EV_A_ (W)w);
		2685	if (expect_false (!ev_is_active (w)))
		2686	return;
		2687
		2688	{
		2689	int active = ev_active (w);
		2690
		2691	asyncs [active - 1] = asyncs [--asynccnt];
		2692	ev_active (asyncs [active - 1]) = active;
		2693	}
		2694
		2695	ev_stop (EV_A_ (W)w);
		2696	}
		2697
		2698	void
		2699	ev_async_send (EV_P_ ev_async *w)
		2700	{
		2701	w->sent = 1;
		2702	evpipe_write (EV_A_ &gotasync);
		2703	}
		2704	#endif
		2705
1532	/*****************************************************************************/	2706	/*****************************************************************************/
1533		2707
1534	struct ev_once	2708	struct ev_once
1535	{	2709	{
1536	struct ev_io io;	2710	ev_io io;
1537	struct ev_timer to;	2711	ev_timer to;
1538	void (*cb)(int revents, void *arg);	2712	void (*cb)(int revents, void *arg);
1539	void *arg;	2713	void *arg;
1540	};	2714	};
1541		2715
1542	static void	2716	static void
…		…
1551		2725
1552	cb (revents, arg);	2726	cb (revents, arg);
1553	}	2727	}
1554		2728
1555	static void	2729	static void
1556	once_cb_io (EV_P_ struct ev_io *w, int revents)	2730	once_cb_io (EV_P_ ev_io *w, int revents)
1557	{	2731	{
1558	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2732	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1559	}	2733	}
1560		2734
1561	static void	2735	static void
1562	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2736	once_cb_to (EV_P_ ev_timer *w, int revents)
1563	{	2737	{
1564	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2738	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1565	}	2739	}
1566		2740
1567	void	2741	void
1568	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2742	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1569	{	2743	{
1570	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	2744	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1571		2745
1572	if (!once)	2746	if (expect_false (!once))
		2747	{
1573	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2748	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1574	else	2749	return;
1575	{	2750	}
		2751
1576	once->cb = cb;	2752	once->cb = cb;
1577	once->arg = arg;	2753	once->arg = arg;
1578		2754
1579	ev_init (&once->io, once_cb_io);	2755	ev_init (&once->io, once_cb_io);
1580	if (fd >= 0)	2756	if (fd >= 0)
1581	{	2757	{
1582	ev_io_set (&once->io, fd, events);	2758	ev_io_set (&once->io, fd, events);
1583	ev_io_start (EV_A_ &once->io);	2759	ev_io_start (EV_A_ &once->io);
1584	}	2760	}
1585		2761
1586	ev_init (&once->to, once_cb_to);	2762	ev_init (&once->to, once_cb_to);
1587	if (timeout >= 0.)	2763	if (timeout >= 0.)
1588	{	2764	{
1589	ev_timer_set (&once->to, timeout, 0.);	2765	ev_timer_set (&once->to, timeout, 0.);
1590	ev_timer_start (EV_A_ &once->to);	2766	ev_timer_start (EV_A_ &once->to);
1591	}
1592	}	2767	}
1593	}	2768	}
1594		2769
		2770	#if EV_MULTIPLICITY
		2771	#include "ev_wrap.h"
		2772	#endif
		2773
		2774	#ifdef __cplusplus
		2775	}
		2776	#endif
		2777

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