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Comparing libev/ev.c (file contents):
Revision 1.81 by root, Fri Nov 9 17:07:59 2007 UTC vs.
Revision 1.244 by root, Tue May 20 23:49:41 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	#ifndef EV_USE_4HEAP
		241	# define EV_USE_4HEAP !EV_MINIMAL
		242	#endif
		243
		244	#ifndef EV_HEAP_CACHE_AT
		245	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		246	#endif
		247
		248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		249
		250	#ifndef CLOCK_MONOTONIC
		251	# undef EV_USE_MONOTONIC
		252	# define EV_USE_MONOTONIC 0
		253	#endif
		254
		255	#ifndef CLOCK_REALTIME
		256	# undef EV_USE_REALTIME
		257	# define EV_USE_REALTIME 0
		258	#endif
		259
		260	#if !EV_STAT_ENABLE
		261	# undef EV_USE_INOTIFY
		262	# define EV_USE_INOTIFY 0
		263	#endif
		264
		265	#if !EV_USE_NANOSLEEP
		266	# ifndef _WIN32
		267	# include <sys/select.h>
		268	# endif
		269	#endif
		270
		271	#if EV_USE_INOTIFY
		272	# include <sys/inotify.h>
		273	#endif
		274
		275	#if EV_SELECT_IS_WINSOCKET
		276	# include <winsock.h>
		277	#endif
		278
		279	#if EV_USE_EVENTFD
		280	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		281	# include <stdint.h>
		282	# ifdef __cplusplus
		283	extern "C" {
		284	# endif
		285	int eventfd (unsigned int initval, int flags);
		286	# ifdef __cplusplus
		287	}
		288	# endif
		289	#endif
		290
		291	/**/
		292
		293	/*
		294	* This is used to avoid floating point rounding problems.
		295	* It is added to ev_rt_now when scheduling periodics
		296	* to ensure progress, time-wise, even when rounding
		297	* errors are against us.
		298	* This value is good at least till the year 4000.
		299	* Better solutions welcome.
		300	*/
		301	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		302
		303	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		304	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		305	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		306
137	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
138	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
139	# define inline inline	309	# define noinline __attribute__ ((noinline))
140	#else	310	#else
141	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
142	# define inline static	312	# define noinline
		313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		314	# define inline
		315	# endif
143	#endif	316	#endif
144		317
145	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
146	#define expect_true(expr) expect ((expr) != 0, 1)	319	#define expect_true(expr) expect ((expr) != 0, 1)
		320	#define inline_size static inline
		321
		322	#if EV_MINIMAL
		323	# define inline_speed static noinline
		324	#else
		325	# define inline_speed static inline
		326	#endif
147		327
148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	328	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	329	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
150		330
		331	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		332	#define EMPTY2(a,b) /* used to suppress some warnings */
		333
151	typedef struct ev_watcher *W;	334	typedef ev_watcher *W;
152	typedef struct ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
153	typedef struct ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
154		337
		338	#define ev_active(w) ((W)(w))->active
		339	#define ev_at(w) ((WT)(w))->at
		340
		341	#if EV_USE_MONOTONIC
		342	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		343	/* giving it a reasonably high chance of working on typical architetcures */
155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	344	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		345	#endif
156		346
		347	#ifdef _WIN32
157	#include "ev_win32.c"	348	# include "ev_win32.c"
		349	#endif
158		350
159	/*****************************************************************************/	351	/*****************************************************************************/
160		352
161	static void (*syserr_cb)(const char *msg);	353	static void (*syserr_cb)(const char *msg);
162		354
		355	void
163	void ev_set_syserr_cb (void (*cb)(const char *msg))	356	ev_set_syserr_cb (void (*cb)(const char *msg))
164	{	357	{
165	syserr_cb = cb;	358	syserr_cb = cb;
166	}	359	}
167		360
168	static void	361	static void noinline
169	syserr (const char *msg)	362	syserr (const char *msg)
170	{	363	{
171	if (!msg)	364	if (!msg)
172	msg = "(libev) system error";	365	msg = "(libev) system error";
173		366
…		…
178	perror (msg);	371	perror (msg);
179	abort ();	372	abort ();
180	}	373	}
181	}	374	}
182		375
		376	static void *
		377	ev_realloc_emul (void *ptr, long size)
		378	{
		379	/* some systems, notably openbsd and darwin, fail to properly
		380	* implement realloc (x, 0) (as required by both ansi c-98 and
		381	* the single unix specification, so work around them here.
		382	*/
		383
		384	if (size)
		385	return realloc (ptr, size);
		386
		387	free (ptr);
		388	return 0;
		389	}
		390
183	static void *(*alloc)(void *ptr, long size);	391	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184		392
		393	void
185	void ev_set_allocator (void *(*cb)(void *ptr, long size))	394	ev_set_allocator (void *(*cb)(void *ptr, long size))
186	{	395	{
187	alloc = cb;	396	alloc = cb;
188	}	397	}
189		398
190	static void *	399	inline_speed void *
191	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
192	{	401	{
193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
194		403
195	if (!ptr && size)	404	if (!ptr && size)
196	{	405	{
197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
198	abort ();	407	abort ();
…		…
209	typedef struct	418	typedef struct
210	{	419	{
211	WL head;	420	WL head;
212	unsigned char events;	421	unsigned char events;
213	unsigned char reify;	422	unsigned char reify;
		423	#if EV_SELECT_IS_WINSOCKET
		424	SOCKET handle;
		425	#endif
214	} ANFD;	426	} ANFD;
215		427
216	typedef struct	428	typedef struct
217	{	429	{
218	W w;	430	W w;
219	int events;	431	int events;
220	} ANPENDING;	432	} ANPENDING;
221		433
		434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
		436	typedef struct
		437	{
		438	WL head;
		439	} ANFS;
		440	#endif
		441
		442	/* Heap Entry */
		443	#if EV_HEAP_CACHE_AT
		444	typedef struct {
		445	ev_tstamp at;
		446	WT w;
		447	} ANHE;
		448
		449	#define ANHE_w(he) (he).w /* access watcher, read-write */
		450	#define ANHE_at(he) (he).at /* access cached at, read-only */
		451	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		452	#else
		453	typedef WT ANHE;
		454
		455	#define ANHE_w(he) (he)
		456	#define ANHE_at(he) (he)->at
		457	#define ANHE_at_set(he)
		458	#endif
		459
222	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
223		461
224	struct ev_loop	462	struct ev_loop
225	{	463	{
		464	ev_tstamp ev_rt_now;
		465	#define ev_rt_now ((loop)->ev_rt_now)
226	#define VAR(name,decl) decl;	466	#define VAR(name,decl) decl;
227	#include "ev_vars.h"	467	#include "ev_vars.h"
228	#undef VAR	468	#undef VAR
229	};	469	};
230	#include "ev_wrap.h"	470	#include "ev_wrap.h"
231		471
232	struct ev_loop default_loop_struct;	472	static struct ev_loop default_loop_struct;
233	static struct ev_loop *default_loop;	473	struct ev_loop *ev_default_loop_ptr;
234		474
235	#else	475	#else
236		476
		477	ev_tstamp ev_rt_now;
237	#define VAR(name,decl) static decl;	478	#define VAR(name,decl) static decl;
238	#include "ev_vars.h"	479	#include "ev_vars.h"
239	#undef VAR	480	#undef VAR
240		481
241	static int default_loop;	482	static int ev_default_loop_ptr;
242		483
243	#endif	484	#endif
244		485
245	/*****************************************************************************/	486	/*****************************************************************************/
246		487
247	inline ev_tstamp	488	ev_tstamp
248	ev_time (void)	489	ev_time (void)
249	{	490	{
250	#if EV_USE_REALTIME	491	#if EV_USE_REALTIME
251	struct timespec ts;	492	struct timespec ts;
252	clock_gettime (CLOCK_REALTIME, &ts);	493	clock_gettime (CLOCK_REALTIME, &ts);
…		…
256	gettimeofday (&tv, 0);	497	gettimeofday (&tv, 0);
257	return tv.tv_sec + tv.tv_usec * 1e-6;	498	return tv.tv_sec + tv.tv_usec * 1e-6;
258	#endif	499	#endif
259	}	500	}
260		501
261	inline ev_tstamp	502	ev_tstamp inline_size
262	get_clock (void)	503	get_clock (void)
263	{	504	{
264	#if EV_USE_MONOTONIC	505	#if EV_USE_MONOTONIC
265	if (expect_true (have_monotonic))	506	if (expect_true (have_monotonic))
266	{	507	{
…		…
271	#endif	512	#endif
272		513
273	return ev_time ();	514	return ev_time ();
274	}	515	}
275		516
		517	#if EV_MULTIPLICITY
276	ev_tstamp	518	ev_tstamp
277	ev_now (EV_P)	519	ev_now (EV_P)
278	{	520	{
279	return rt_now;	521	return ev_rt_now;
280	}	522	}
		523	#endif
281		524
282	#define array_roundsize(type,n) ((n) | 4 & ~3)	525	void
		526	ev_sleep (ev_tstamp delay)
		527	{
		528	if (delay > 0.)
		529	{
		530	#if EV_USE_NANOSLEEP
		531	struct timespec ts;
		532
		533	ts.tv_sec = (time_t)delay;
		534	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		535
		536	nanosleep (&ts, 0);
		537	#elif defined(_WIN32)
		538	Sleep ((unsigned long)(delay * 1e3));
		539	#else
		540	struct timeval tv;
		541
		542	tv.tv_sec = (time_t)delay;
		543	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		544
		545	select (0, 0, 0, 0, &tv);
		546	#endif
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		553
		554	int inline_size
		555	array_nextsize (int elem, int cur, int cnt)
		556	{
		557	int ncur = cur + 1;
		558
		559	do
		560	ncur <<= 1;
		561	while (cnt > ncur);
		562
		563	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		564	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		565	{
		566	ncur *= elem;
		567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		568	ncur = ncur - sizeof (void *) * 4;
		569	ncur /= elem;
		570	}
		571
		572	return ncur;
		573	}
		574
		575	static noinline void *
		576	array_realloc (int elem, void *base, int *cur, int cnt)
		577	{
		578	*cur = array_nextsize (elem, *cur, cnt);
		579	return ev_realloc (base, elem * *cur);
		580	}
283		581
284	#define array_needsize(type,base,cur,cnt,init) \	582	#define array_needsize(type,base,cur,cnt,init) \
285	if (expect_false ((cnt) > cur)) \	583	if (expect_false ((cnt) > (cur))) \
286	{ \	584	{ \
287	int newcnt = cur; \	585	int ocur_ = (cur); \
288	do \	586	(base) = (type *)array_realloc \
289	{ \	587	(sizeof (type), (base), &(cur), (cnt)); \
290	newcnt = array_roundsize (type, newcnt << 1); \	588	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	}	589	}
298		590
		591	#if 0
299	#define array_slim(type,stem) \	592	#define array_slim(type,stem) \
300	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	593	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301	{ \	594	{ \
302	stem ## max = array_roundsize (stem ## cnt >> 1); \	595	stem ## max = array_roundsize (stem ## cnt >> 1); \
303	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	596	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	597	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305	}	598	}
306		599	#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		600
312	#define array_free(stem, idx) \	601	#define array_free(stem, idx) \
313	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	602	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
314		603
315	/*****************************************************************************/	604	/*****************************************************************************/
316		605
317	static void	606	void noinline
		607	ev_feed_event (EV_P_ void *w, int revents)
		608	{
		609	W w_ = (W)w;
		610	int pri = ABSPRI (w_);
		611
		612	if (expect_false (w_->pending))
		613	pendings [pri][w_->pending - 1].events |= revents;
		614	else
		615	{
		616	w_->pending = ++pendingcnt [pri];
		617	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		618	pendings [pri][w_->pending - 1].w = w_;
		619	pendings [pri][w_->pending - 1].events = revents;
		620	}
		621	}
		622
		623	void inline_speed
		624	queue_events (EV_P_ W *events, int eventcnt, int type)
		625	{
		626	int i;
		627
		628	for (i = 0; i < eventcnt; ++i)
		629	ev_feed_event (EV_A_ events [i], type);
		630	}
		631
		632	/*****************************************************************************/
		633
		634	void inline_size
318	anfds_init (ANFD *base, int count)	635	anfds_init (ANFD *base, int count)
319	{	636	{
320	while (count--)	637	while (count--)
321	{	638	{
322	base->head = 0;	639	base->head = 0;
…		…
325		642
326	++base;	643	++base;
327	}	644	}
328	}	645	}
329		646
330	void	647	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)	648	fd_event (EV_P_ int fd, int revents)
358	{	649	{
359	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
360	struct ev_io *w;	651	ev_io *w;
361		652
362	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	653	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363	{	654	{
364	int ev = w->events & revents;	655	int ev = w->events & revents;
365		656
366	if (ev)	657	if (ev)
367	ev_feed_event (EV_A_ (W)w, ev);	658	ev_feed_event (EV_A_ (W)w, ev);
…		…
369	}	660	}
370		661
371	void	662	void
372	ev_feed_fd_event (EV_P_ int fd, int revents)	663	ev_feed_fd_event (EV_P_ int fd, int revents)
373	{	664	{
		665	if (fd >= 0 && fd < anfdmax)
374	fd_event (EV_A_ fd, revents);	666	fd_event (EV_A_ fd, revents);
375	}	667	}
376		668
377	/*****************************************************************************/	669	void inline_size
378
379	static void
380	fd_reify (EV_P)	670	fd_reify (EV_P)
381	{	671	{
382	int i;	672	int i;
383		673
384	for (i = 0; i < fdchangecnt; ++i)	674	for (i = 0; i < fdchangecnt; ++i)
385	{	675	{
386	int fd = fdchanges [i];	676	int fd = fdchanges [i];
387	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
388	struct ev_io *w;	678	ev_io *w;
389		679
390	int events = 0;	680	unsigned char events = 0;
391		681
392	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	682	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
393	events |= w->events;	683	events |= (unsigned char)w->events;
394		684
		685	#if EV_SELECT_IS_WINSOCKET
		686	if (events)
		687	{
		688	unsigned long argp;
		689	#ifdef EV_FD_TO_WIN32_HANDLE
		690	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		691	#else
		692	anfd->handle = _get_osfhandle (fd);
		693	#endif
		694	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		695	}
		696	#endif
		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
395	anfd->reify = 0;	702	anfd->reify = 0;
396
397	method_modify (EV_A_ fd, anfd->events, events);
398	anfd->events = events;	703	anfd->events = events;
		704
		705	if (o_events != events || o_reify & EV_IOFDSET)
		706	backend_modify (EV_A_ fd, o_events, events);
		707	}
399	}	708	}
400		709
401	fdchangecnt = 0;	710	fdchangecnt = 0;
402	}	711	}
403		712
404	static void	713	void inline_size
405	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
406	{	715	{
407	if (anfds [fd].reify)	716	unsigned char reify = anfds [fd].reify;
408	return;
409
410	anfds [fd].reify = 1;	717	anfds [fd].reify |= flags;
411		718
		719	if (expect_true (!reify))
		720	{
412	++fdchangecnt;	721	++fdchangecnt;
413	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
415	}	725	}
416		726
417	static void	727	void inline_speed
418	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
419	{	729	{
420	struct ev_io *w;	730	ev_io *w;
421		731
422	while ((w = (struct ev_io *)anfds [fd].head))	732	while ((w = (ev_io *)anfds [fd].head))
423	{	733	{
424	ev_io_stop (EV_A_ w);	734	ev_io_stop (EV_A_ w);
425	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	735	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426	}	736	}
427	}	737	}
428		738
429	static int	739	int inline_size
430	fd_valid (int fd)	740	fd_valid (int fd)
431	{	741	{
432	#ifdef WIN32	742	#ifdef _WIN32
433	return !!win32_get_osfhandle (fd);	743	return _get_osfhandle (fd) != -1;
434	#else	744	#else
435	return fcntl (fd, F_GETFD) != -1;	745	return fcntl (fd, F_GETFD) != -1;
436	#endif	746	#endif
437	}	747	}
438		748
439	/* called on EBADF to verify fds */	749	/* called on EBADF to verify fds */
440	static void	750	static void noinline
441	fd_ebadf (EV_P)	751	fd_ebadf (EV_P)
442	{	752	{
443	int fd;	753	int fd;
444		754
445	for (fd = 0; fd < anfdmax; ++fd)	755	for (fd = 0; fd < anfdmax; ++fd)
…		…
447	if (!fd_valid (fd) == -1 && errno == EBADF)	757	if (!fd_valid (fd) == -1 && errno == EBADF)
448	fd_kill (EV_A_ fd);	758	fd_kill (EV_A_ fd);
449	}	759	}
450		760
451	/* called on ENOMEM in select/poll to kill some fds and retry */	761	/* called on ENOMEM in select/poll to kill some fds and retry */
452	static void	762	static void noinline
453	fd_enomem (EV_P)	763	fd_enomem (EV_P)
454	{	764	{
455	int fd;	765	int fd;
456		766
457	for (fd = anfdmax; fd--; )	767	for (fd = anfdmax; fd--; )
…		…
460	fd_kill (EV_A_ fd);	770	fd_kill (EV_A_ fd);
461	return;	771	return;
462	}	772	}
463	}	773	}
464		774
465	/* usually called after fork if method needs to re-arm all fds from scratch */	775	/* usually called after fork if backend needs to re-arm all fds from scratch */
466	static void	776	static void noinline
467	fd_rearm_all (EV_P)	777	fd_rearm_all (EV_P)
468	{	778	{
469	int fd;	779	int fd;
470		780
471	/* this should be highly optimised to not do anything but set a flag */
472	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
473	if (anfds [fd].events)	782	if (anfds [fd].events)
474	{	783	{
475	anfds [fd].events = 0;	784	anfds [fd].events = 0;
476	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET | 1);
477	}	786	}
478	}	787	}
479		788
480	/*****************************************************************************/	789	/*****************************************************************************/
481		790
482	static void	791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807
		808	/* towards the root */
		809	void inline_speed
483	upheap (WT *heap, int k)	810	upheap (ANHE *heap, int k)
484	{	811	{
485	WT w = heap [k];	812	ANHE he = heap [k];
486		813
487	while (k && heap [k >> 1]->at > w->at)	814	for (;;)
488	{
489	heap [k] = heap [k >> 1];
490	((W)heap [k])->active = k + 1;
491	k >>= 1;
492	}	815	{
		816	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
493		817
494	heap [k] = w;	818	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
495	((W)heap [k])->active = k + 1;
496
497	}
498
499	static void
500	downheap (WT *heap, int N, int k)
501	{
502	WT w = heap [k];
503
504	while (k < (N >> 1))
505	{
506	int j = k << 1;
507
508	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
509	++j;
510
511	if (w->at <= heap [j]->at)
512	break;	819	break;
513		820
514	heap [k] = heap [j];	821	heap [k] = heap [p];
515	((W)heap [k])->active = k + 1;	822	ev_active (ANHE_w (heap [k])) = k;
516	k = j;	823	k = p;
517	}	824	}
518		825
		826	ev_active (ANHE_w (he)) = k;
519	heap [k] = w;	827	heap [k] = he;
520	((W)heap [k])->active = k + 1;	828	}
		829
		830	/* away from the root */
		831	void inline_speed
		832	downheap (ANHE *heap, int N, int k)
		833	{
		834	ANHE he = heap [k];
		835	ANHE *E = heap + N + HEAP0;
		836
		837	for (;;)
		838	{
		839	ev_tstamp minat;
		840	ANHE *minpos;
		841	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		842
		843	// find minimum child
		844	if (expect_true (pos + DHEAP - 1 < E))
		845	{
		846	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else if (pos < E)
		852	{
		853	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		854	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		855	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		856	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		857	}
		858	else
		859	break;
		860
		861	if (ANHE_at (he) <= minat)
		862	break;
		863
		864	ev_active (ANHE_w (*minpos)) = k;
		865	heap [k] = *minpos;
		866
		867	k = minpos - heap;
		868	}
		869
		870	ev_active (ANHE_w (he)) = k;
		871	heap [k] = he;
		872	}
		873
		874	#else // 4HEAP
		875
		876	#define HEAP0 1
		877
		878	/* towards the root */
		879	void inline_speed
		880	upheap (ANHE *heap, int k)
		881	{
		882	ANHE he = heap [k];
		883
		884	for (;;)
		885	{
		886	int p = k >> 1;
		887
		888	/* maybe we could use a dummy element at heap [0]? */
		889	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		890	break;
		891
		892	heap [k] = heap [p];
		893	ev_active (ANHE_w (heap [k])) = k;
		894	k = p;
		895	}
		896
		897	heap [k] = he;
		898	ev_active (ANHE_w (heap [k])) = k;
		899	}
		900
		901	/* away from the root */
		902	void inline_speed
		903	downheap (ANHE *heap, int N, int k)
		904	{
		905	ANHE he = heap [k];
		906
		907	for (;;)
		908	{
		909	int c = k << 1;
		910
		911	if (c > N)
		912	break;
		913
		914	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		915	? 1 : 0;
		916
		917	if (ANHE_at (he) <= ANHE_at (heap [c]))
		918	break;
		919
		920	heap [k] = heap [c];
		921	ev_active (ANHE_w (heap [k])) = k;
		922
		923	k = c;
		924	}
		925
		926	heap [k] = he;
		927	ev_active (ANHE_w (he)) = k;
		928	}
		929	#endif
		930
		931	void inline_size
		932	adjustheap (ANHE *heap, int N, int k)
		933	{
		934	upheap (heap, k);
		935	downheap (heap, N, k);
521	}	936	}
522		937
523	/*****************************************************************************/	938	/*****************************************************************************/
524		939
525	typedef struct	940	typedef struct
526	{	941	{
527	WL head;	942	WL head;
528	sig_atomic_t volatile gotsig;	943	EV_ATOMIC_T gotsig;
529	} ANSIG;	944	} ANSIG;
530		945
531	static ANSIG *signals;	946	static ANSIG *signals;
532	static int signalmax;	947	static int signalmax;
533		948
534	static int sigpipe [2];	949	static EV_ATOMIC_T gotsig;
535	static sig_atomic_t volatile gotsig;
536	static struct ev_io sigev;
537		950
538	static void	951	void inline_size
539	signals_init (ANSIG *base, int count)	952	signals_init (ANSIG *base, int count)
540	{	953	{
541	while (count--)	954	while (count--)
542	{	955	{
543	base->head = 0;	956	base->head = 0;
…		…
545		958
546	++base;	959	++base;
547	}	960	}
548	}	961	}
549		962
		963	/*****************************************************************************/
		964
		965	void inline_speed
		966	fd_intern (int fd)
		967	{
		968	#ifdef _WIN32
		969	int arg = 1;
		970	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		971	#else
		972	fcntl (fd, F_SETFD, FD_CLOEXEC);
		973	fcntl (fd, F_SETFL, O_NONBLOCK);
		974	#endif
		975	}
		976
		977	static void noinline
		978	evpipe_init (EV_P)
		979	{
		980	if (!ev_is_active (&pipeev))
		981	{
		982	#if EV_USE_EVENTFD
		983	if ((evfd = eventfd (0, 0)) >= 0)
		984	{
		985	evpipe [0] = -1;
		986	fd_intern (evfd);
		987	ev_io_set (&pipeev, evfd, EV_READ);
		988	}
		989	else
		990	#endif
		991	{
		992	while (pipe (evpipe))
		993	syserr ("(libev) error creating signal/async pipe");
		994
		995	fd_intern (evpipe [0]);
		996	fd_intern (evpipe [1]);
		997	ev_io_set (&pipeev, evpipe [0], EV_READ);
		998	}
		999
		1000	ev_io_start (EV_A_ &pipeev);
		1001	ev_unref (EV_A); /* watcher should not keep loop alive */
		1002	}
		1003	}
		1004
		1005	void inline_size
		1006	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1007	{
		1008	if (!*flag)
		1009	{
		1010	int old_errno = errno; /* save errno because write might clobber it */
		1011
		1012	*flag = 1;
		1013
		1014	#if EV_USE_EVENTFD
		1015	if (evfd >= 0)
		1016	{
		1017	uint64_t counter = 1;
		1018	write (evfd, &counter, sizeof (uint64_t));
		1019	}
		1020	else
		1021	#endif
		1022	write (evpipe [1], &old_errno, 1);
		1023
		1024	errno = old_errno;
		1025	}
		1026	}
		1027
550	static void	1028	static void
		1029	pipecb (EV_P_ ev_io *iow, int revents)
		1030	{
		1031	#if EV_USE_EVENTFD
		1032	if (evfd >= 0)
		1033	{
		1034	uint64_t counter;
		1035	read (evfd, &counter, sizeof (uint64_t));
		1036	}
		1037	else
		1038	#endif
		1039	{
		1040	char dummy;
		1041	read (evpipe [0], &dummy, 1);
		1042	}
		1043
		1044	if (gotsig && ev_is_default_loop (EV_A))
		1045	{
		1046	int signum;
		1047	gotsig = 0;
		1048
		1049	for (signum = signalmax; signum--; )
		1050	if (signals [signum].gotsig)
		1051	ev_feed_signal_event (EV_A_ signum + 1);
		1052	}
		1053
		1054	#if EV_ASYNC_ENABLE
		1055	if (gotasync)
		1056	{
		1057	int i;
		1058	gotasync = 0;
		1059
		1060	for (i = asynccnt; i--; )
		1061	if (asyncs [i]->sent)
		1062	{
		1063	asyncs [i]->sent = 0;
		1064	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1065	}
		1066	}
		1067	#endif
		1068	}
		1069
		1070	/*****************************************************************************/
		1071
		1072	static void
551	sighandler (int signum)	1073	ev_sighandler (int signum)
552	{	1074	{
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *loop = &default_loop_struct;
		1077	#endif
		1078
553	#if WIN32	1079	#if _WIN32
554	signal (signum, sighandler);	1080	signal (signum, ev_sighandler);
555	#endif	1081	#endif
556		1082
557	signals [signum - 1].gotsig = 1;	1083	signals [signum - 1].gotsig = 1;
558		1084	evpipe_write (EV_A_ &gotsig);
559	if (!gotsig)
560	{
561	int old_errno = errno;
562	gotsig = 1;
563	#ifdef WIN32
564	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
565	#else
566	write (sigpipe [1], &signum, 1);
567	#endif
568	errno = old_errno;
569	}
570	}	1085	}
571		1086
572	void	1087	void noinline
573	ev_feed_signal_event (EV_P_ int signum)	1088	ev_feed_signal_event (EV_P_ int signum)
574	{	1089	{
575	WL w;	1090	WL w;
576		1091
577	#if EV_MULTIPLICITY	1092	#if EV_MULTIPLICITY
578	assert (("feeding signal events is only supported in the default loop", loop == default_loop));	1093	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
579	#endif	1094	#endif
580		1095
581	--signum;	1096	--signum;
582		1097
583	if (signum < 0 || signum >= signalmax)	1098	if (signum < 0 || signum >= signalmax)
…		…
587		1102
588	for (w = signals [signum].head; w; w = w->next)	1103	for (w = signals [signum].head; w; w = w->next)
589	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1104	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
590	}	1105	}
591		1106
592	static void
593	sigcb (EV_P_ struct ev_io *iow, int revents)
594	{
595	int signum;
596
597	#ifdef WIN32
598	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
599	#else
600	read (sigpipe [0], &revents, 1);
601	#endif
602	gotsig = 0;
603
604	for (signum = signalmax; signum--; )
605	if (signals [signum].gotsig)
606	ev_feed_signal_event (EV_A_ signum + 1);
607	}
608
609	static void
610	siginit (EV_P)
611	{
612	#ifndef WIN32
613	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
614	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
615
616	/* rather than sort out wether we really need nb, set it */
617	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
618	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
619	#endif
620
621	ev_io_set (&sigev, sigpipe [0], EV_READ);
622	ev_io_start (EV_A_ &sigev);
623	ev_unref (EV_A); /* child watcher should not keep loop alive */
624	}
625
626	/*****************************************************************************/	1107	/*****************************************************************************/
627		1108
628	static struct ev_child *childs [PID_HASHSIZE];	1109	static WL childs [EV_PID_HASHSIZE];
629		1110
630	#ifndef WIN32	1111	#ifndef _WIN32
631		1112
632	static struct ev_signal childev;	1113	static ev_signal childev;
		1114
		1115	#ifndef WIFCONTINUED
		1116	# define WIFCONTINUED(status) 0
		1117	#endif
		1118
		1119	void inline_speed
		1120	child_reap (EV_P_ int chain, int pid, int status)
		1121	{
		1122	ev_child *w;
		1123	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1124
		1125	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1126	{
		1127	if ((w->pid == pid || !w->pid)
		1128	&& (!traced || (w->flags & 1)))
		1129	{
		1130	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1131	w->rpid = pid;
		1132	w->rstatus = status;
		1133	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1134	}
		1135	}
		1136	}
633		1137
634	#ifndef WCONTINUED	1138	#ifndef WCONTINUED
635	# define WCONTINUED 0	1139	# define WCONTINUED 0
636	#endif	1140	#endif
637		1141
638	static void	1142	static void
639	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
640	{
641	struct ev_child *w;
642
643	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
644	if (w->pid == pid || !w->pid)
645	{
646	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
647	w->rpid = pid;
648	w->rstatus = status;
649	ev_feed_event (EV_A_ (W)w, EV_CHILD);
650	}
651	}
652
653	static void
654	childcb (EV_P_ struct ev_signal *sw, int revents)	1143	childcb (EV_P_ ev_signal *sw, int revents)
655	{	1144	{
656	int pid, status;	1145	int pid, status;
657		1146
		1147	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
658	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1148	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
659	{	1149	if (!WCONTINUED
		1150	|| errno != EINVAL
		1151	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1152	return;
		1153
660	/* make sure we are called again until all childs have been reaped */	1154	/* make sure we are called again until all children have been reaped */
		1155	/* we need to do it this way so that the callback gets called before we continue */
661	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1156	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
662		1157
663	child_reap (EV_A_ sw, pid, pid, status);	1158	child_reap (EV_A_ pid, pid, status);
		1159	if (EV_PID_HASHSIZE > 1)
664	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1160	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
665	}
666	}	1161	}
667		1162
668	#endif	1163	#endif
669		1164
670	/*****************************************************************************/	1165	/*****************************************************************************/
671		1166
		1167	#if EV_USE_PORT
		1168	# include "ev_port.c"
		1169	#endif
672	#if EV_USE_KQUEUE	1170	#if EV_USE_KQUEUE
673	# include "ev_kqueue.c"	1171	# include "ev_kqueue.c"
674	#endif	1172	#endif
675	#if EV_USE_EPOLL	1173	#if EV_USE_EPOLL
676	# include "ev_epoll.c"	1174	# include "ev_epoll.c"
…		…
693	{	1191	{
694	return EV_VERSION_MINOR;	1192	return EV_VERSION_MINOR;
695	}	1193	}
696		1194
697	/* return true if we are running with elevated privileges and should ignore env variables */	1195	/* return true if we are running with elevated privileges and should ignore env variables */
698	static int	1196	int inline_size
699	enable_secure (void)	1197	enable_secure (void)
700	{	1198	{
701	#ifdef WIN32	1199	#ifdef _WIN32
702	return 0;	1200	return 0;
703	#else	1201	#else
704	return getuid () != geteuid ()	1202	return getuid () != geteuid ()
705	|| getgid () != getegid ();	1203	|| getgid () != getegid ();
706	#endif	1204	#endif
707	}	1205	}
708		1206
709	int	1207	unsigned int
710	ev_method (EV_P)	1208	ev_supported_backends (void)
711	{	1209	{
712	return method;	1210	unsigned int flags = 0;
713	}
714		1211
715	static void	1212	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
716	loop_init (EV_P_ int methods)	1213	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1214	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1215	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1216	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1217
		1218	return flags;
		1219	}
		1220
		1221	unsigned int
		1222	ev_recommended_backends (void)
717	{	1223	{
718	if (!method)	1224	unsigned int flags = ev_supported_backends ();
		1225
		1226	#ifndef __NetBSD__
		1227	/* kqueue is borked on everything but netbsd apparently */
		1228	/* it usually doesn't work correctly on anything but sockets and pipes */
		1229	flags &= ~EVBACKEND_KQUEUE;
		1230	#endif
		1231	#ifdef __APPLE__
		1232	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1233	flags &= ~EVBACKEND_POLL;
		1234	#endif
		1235
		1236	return flags;
		1237	}
		1238
		1239	unsigned int
		1240	ev_embeddable_backends (void)
		1241	{
		1242	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1243
		1244	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1245	/* please fix it and tell me how to detect the fix */
		1246	flags &= ~EVBACKEND_EPOLL;
		1247
		1248	return flags;
		1249	}
		1250
		1251	unsigned int
		1252	ev_backend (EV_P)
		1253	{
		1254	return backend;
		1255	}
		1256
		1257	unsigned int
		1258	ev_loop_count (EV_P)
		1259	{
		1260	return loop_count;
		1261	}
		1262
		1263	void
		1264	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	io_blocktime = interval;
		1267	}
		1268
		1269	void
		1270	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1271	{
		1272	timeout_blocktime = interval;
		1273	}
		1274
		1275	static void noinline
		1276	loop_init (EV_P_ unsigned int flags)
		1277	{
		1278	if (!backend)
719	{	1279	{
720	#if EV_USE_MONOTONIC	1280	#if EV_USE_MONOTONIC
721	{	1281	{
722	struct timespec ts;	1282	struct timespec ts;
723	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1283	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
724	have_monotonic = 1;	1284	have_monotonic = 1;
725	}	1285	}
726	#endif	1286	#endif
727		1287
728	rt_now = ev_time ();	1288	ev_rt_now = ev_time ();
729	mn_now = get_clock ();	1289	mn_now = get_clock ();
730	now_floor = mn_now;	1290	now_floor = mn_now;
731	rtmn_diff = rt_now - mn_now;	1291	rtmn_diff = ev_rt_now - mn_now;
732		1292
733	if (methods == EVMETHOD_AUTO)	1293	io_blocktime = 0.;
734	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1294	timeout_blocktime = 0.;
		1295	backend = 0;
		1296	backend_fd = -1;
		1297	gotasync = 0;
		1298	#if EV_USE_INOTIFY
		1299	fs_fd = -2;
		1300	#endif
		1301
		1302	/* pid check not overridable via env */
		1303	#ifndef _WIN32
		1304	if (flags & EVFLAG_FORKCHECK)
		1305	curpid = getpid ();
		1306	#endif
		1307
		1308	if (!(flags & EVFLAG_NOENV)
		1309	&& !enable_secure ()
		1310	&& getenv ("LIBEV_FLAGS"))
735	methods = atoi (getenv ("LIBEV_METHODS"));	1311	flags = atoi (getenv ("LIBEV_FLAGS"));
736	else
737	methods = EVMETHOD_ANY;
738		1312
739	method = 0;	1313	if (!(flags & 0x0000ffffU))
740	#if EV_USE_WIN32	1314	flags |= ev_recommended_backends ();
741	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	1315
		1316	#if EV_USE_PORT
		1317	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
742	#endif	1318	#endif
743	#if EV_USE_KQUEUE	1319	#if EV_USE_KQUEUE
744	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1320	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
745	#endif	1321	#endif
746	#if EV_USE_EPOLL	1322	#if EV_USE_EPOLL
747	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1323	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
748	#endif	1324	#endif
749	#if EV_USE_POLL	1325	#if EV_USE_POLL
750	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1326	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
751	#endif	1327	#endif
752	#if EV_USE_SELECT	1328	#if EV_USE_SELECT
753	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1329	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
754	#endif	1330	#endif
755		1331
756	ev_watcher_init (&sigev, sigcb);	1332	ev_init (&pipeev, pipecb);
757	ev_set_priority (&sigev, EV_MAXPRI);	1333	ev_set_priority (&pipeev, EV_MAXPRI);
758	}	1334	}
759	}	1335	}
760		1336
761	void	1337	static void noinline
762	loop_destroy (EV_P)	1338	loop_destroy (EV_P)
763	{	1339	{
764	int i;	1340	int i;
765		1341
		1342	if (ev_is_active (&pipeev))
		1343	{
		1344	ev_ref (EV_A); /* signal watcher */
		1345	ev_io_stop (EV_A_ &pipeev);
		1346
		1347	#if EV_USE_EVENTFD
		1348	if (evfd >= 0)
		1349	close (evfd);
		1350	#endif
		1351
		1352	if (evpipe [0] >= 0)
		1353	{
		1354	close (evpipe [0]);
		1355	close (evpipe [1]);
		1356	}
		1357	}
		1358
766	#if EV_USE_WIN32	1359	#if EV_USE_INOTIFY
767	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	1360	if (fs_fd >= 0)
		1361	close (fs_fd);
		1362	#endif
		1363
		1364	if (backend_fd >= 0)
		1365	close (backend_fd);
		1366
		1367	#if EV_USE_PORT
		1368	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
768	#endif	1369	#endif
769	#if EV_USE_KQUEUE	1370	#if EV_USE_KQUEUE
770	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1371	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
771	#endif	1372	#endif
772	#if EV_USE_EPOLL	1373	#if EV_USE_EPOLL
773	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1374	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
774	#endif	1375	#endif
775	#if EV_USE_POLL	1376	#if EV_USE_POLL
776	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1377	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
777	#endif	1378	#endif
778	#if EV_USE_SELECT	1379	#if EV_USE_SELECT
779	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1380	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
780	#endif	1381	#endif
781		1382
782	for (i = NUMPRI; i--; )	1383	for (i = NUMPRI; i--; )
		1384	{
783	array_free (pending, [i]);	1385	array_free (pending, [i]);
		1386	#if EV_IDLE_ENABLE
		1387	array_free (idle, [i]);
		1388	#endif
		1389	}
		1390
		1391	ev_free (anfds); anfdmax = 0;
784		1392
785	/* have to use the microsoft-never-gets-it-right macro */	1393	/* have to use the microsoft-never-gets-it-right macro */
786	array_free_microshit (fdchange);	1394	array_free (fdchange, EMPTY);
787	array_free_microshit (timer);	1395	array_free (timer, EMPTY);
788	array_free_microshit (periodic);	1396	#if EV_PERIODIC_ENABLE
789	array_free_microshit (idle);	1397	array_free (periodic, EMPTY);
790	array_free_microshit (prepare);	1398	#endif
791	array_free_microshit (check);	1399	#if EV_FORK_ENABLE
		1400	array_free (fork, EMPTY);
		1401	#endif
		1402	array_free (prepare, EMPTY);
		1403	array_free (check, EMPTY);
		1404	#if EV_ASYNC_ENABLE
		1405	array_free (async, EMPTY);
		1406	#endif
792		1407
793	method = 0;	1408	backend = 0;
794	}	1409	}
795		1410
796	static void	1411	#if EV_USE_INOTIFY
		1412	void inline_size infy_fork (EV_P);
		1413	#endif
		1414
		1415	void inline_size
797	loop_fork (EV_P)	1416	loop_fork (EV_P)
798	{	1417	{
		1418	#if EV_USE_PORT
		1419	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1420	#endif
		1421	#if EV_USE_KQUEUE
		1422	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1423	#endif
799	#if EV_USE_EPOLL	1424	#if EV_USE_EPOLL
800	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1425	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
801	#endif	1426	#endif
802	#if EV_USE_KQUEUE	1427	#if EV_USE_INOTIFY
803	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1428	infy_fork (EV_A);
804	#endif	1429	#endif
805		1430
806	if (ev_is_active (&sigev))	1431	if (ev_is_active (&pipeev))
807	{	1432	{
808	/* default loop */	1433	/* this "locks" the handlers against writing to the pipe */
		1434	/* while we modify the fd vars */
		1435	gotsig = 1;
		1436	#if EV_ASYNC_ENABLE
		1437	gotasync = 1;
		1438	#endif
809		1439
810	ev_ref (EV_A);	1440	ev_ref (EV_A);
811	ev_io_stop (EV_A_ &sigev);	1441	ev_io_stop (EV_A_ &pipeev);
		1442
		1443	#if EV_USE_EVENTFD
		1444	if (evfd >= 0)
		1445	close (evfd);
		1446	#endif
		1447
		1448	if (evpipe [0] >= 0)
		1449	{
812	close (sigpipe [0]);	1450	close (evpipe [0]);
813	close (sigpipe [1]);	1451	close (evpipe [1]);
		1452	}
814		1453
815	while (pipe (sigpipe))
816	syserr ("(libev) error creating pipe");
817
818	siginit (EV_A);	1454	evpipe_init (EV_A);
		1455	/* now iterate over everything, in case we missed something */
		1456	pipecb (EV_A_ &pipeev, EV_READ);
819	}	1457	}
820		1458
821	postfork = 0;	1459	postfork = 0;
822	}	1460	}
823		1461
824	#if EV_MULTIPLICITY	1462	#if EV_MULTIPLICITY
825	struct ev_loop *	1463	struct ev_loop *
826	ev_loop_new (int methods)	1464	ev_loop_new (unsigned int flags)
827	{	1465	{
828	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1466	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
829		1467
830	memset (loop, 0, sizeof (struct ev_loop));	1468	memset (loop, 0, sizeof (struct ev_loop));
831		1469
832	loop_init (EV_A_ methods);	1470	loop_init (EV_A_ flags);
833		1471
834	if (ev_method (EV_A))	1472	if (ev_backend (EV_A))
835	return loop;	1473	return loop;
836		1474
837	return 0;	1475	return 0;
838	}	1476	}
839		1477
…		…
845	}	1483	}
846		1484
847	void	1485	void
848	ev_loop_fork (EV_P)	1486	ev_loop_fork (EV_P)
849	{	1487	{
850	postfork = 1;	1488	postfork = 1; /* must be in line with ev_default_fork */
851	}	1489	}
852
853	#endif	1490	#endif
854		1491
855	#if EV_MULTIPLICITY	1492	#if EV_MULTIPLICITY
856	struct ev_loop *	1493	struct ev_loop *
		1494	ev_default_loop_init (unsigned int flags)
857	#else	1495	#else
858	int	1496	int
		1497	ev_default_loop (unsigned int flags)
859	#endif	1498	#endif
860	ev_default_loop (int methods)
861	{	1499	{
862	if (sigpipe [0] == sigpipe [1])
863	if (pipe (sigpipe))
864	return 0;
865
866	if (!default_loop)	1500	if (!ev_default_loop_ptr)
867	{	1501	{
868	#if EV_MULTIPLICITY	1502	#if EV_MULTIPLICITY
869	struct ev_loop *loop = default_loop = &default_loop_struct;	1503	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
870	#else	1504	#else
871	default_loop = 1;	1505	ev_default_loop_ptr = 1;
872	#endif	1506	#endif
873		1507
874	loop_init (EV_A_ methods);	1508	loop_init (EV_A_ flags);
875		1509
876	if (ev_method (EV_A))	1510	if (ev_backend (EV_A))
877	{	1511	{
878	siginit (EV_A);
879
880	#ifndef WIN32	1512	#ifndef _WIN32
881	ev_signal_init (&childev, childcb, SIGCHLD);	1513	ev_signal_init (&childev, childcb, SIGCHLD);
882	ev_set_priority (&childev, EV_MAXPRI);	1514	ev_set_priority (&childev, EV_MAXPRI);
883	ev_signal_start (EV_A_ &childev);	1515	ev_signal_start (EV_A_ &childev);
884	ev_unref (EV_A); /* child watcher should not keep loop alive */	1516	ev_unref (EV_A); /* child watcher should not keep loop alive */
885	#endif	1517	#endif
886	}	1518	}
887	else	1519	else
888	default_loop = 0;	1520	ev_default_loop_ptr = 0;
889	}	1521	}
890		1522
891	return default_loop;	1523	return ev_default_loop_ptr;
892	}	1524	}
893		1525
894	void	1526	void
895	ev_default_destroy (void)	1527	ev_default_destroy (void)
896	{	1528	{
897	#if EV_MULTIPLICITY	1529	#if EV_MULTIPLICITY
898	struct ev_loop *loop = default_loop;	1530	struct ev_loop *loop = ev_default_loop_ptr;
899	#endif	1531	#endif
900		1532
901	#ifndef WIN32	1533	#ifndef _WIN32
902	ev_ref (EV_A); /* child watcher */	1534	ev_ref (EV_A); /* child watcher */
903	ev_signal_stop (EV_A_ &childev);	1535	ev_signal_stop (EV_A_ &childev);
904	#endif	1536	#endif
905		1537
906	ev_ref (EV_A); /* signal watcher */
907	ev_io_stop (EV_A_ &sigev);
908
909	close (sigpipe [0]); sigpipe [0] = 0;
910	close (sigpipe [1]); sigpipe [1] = 0;
911
912	loop_destroy (EV_A);	1538	loop_destroy (EV_A);
913	}	1539	}
914		1540
915	void	1541	void
916	ev_default_fork (void)	1542	ev_default_fork (void)
917	{	1543	{
918	#if EV_MULTIPLICITY	1544	#if EV_MULTIPLICITY
919	struct ev_loop *loop = default_loop;	1545	struct ev_loop *loop = ev_default_loop_ptr;
920	#endif	1546	#endif
921		1547
922	if (method)	1548	if (backend)
923	postfork = 1;	1549	postfork = 1; /* must be in line with ev_loop_fork */
924	}	1550	}
925		1551
926	/*****************************************************************************/	1552	/*****************************************************************************/
927		1553
928	static int	1554	void
929	any_pending (EV_P)	1555	ev_invoke (EV_P_ void *w, int revents)
930	{	1556	{
931	int pri;	1557	EV_CB_INVOKE ((W)w, revents);
932
933	for (pri = NUMPRI; pri--; )
934	if (pendingcnt [pri])
935	return 1;
936
937	return 0;
938	}	1558	}
939		1559
940	static void	1560	void inline_speed
941	call_pending (EV_P)	1561	call_pending (EV_P)
942	{	1562	{
943	int pri;	1563	int pri;
944		1564
945	for (pri = NUMPRI; pri--; )	1565	for (pri = NUMPRI; pri--; )
946	while (pendingcnt [pri])	1566	while (pendingcnt [pri])
947	{	1567	{
948	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1568	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
949		1569
950	if (p->w)	1570	if (expect_true (p->w))
951	{	1571	{
		1572	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1573
952	p->w->pending = 0;	1574	p->w->pending = 0;
953	p->w->cb (EV_A_ p->w, p->events);	1575	EV_CB_INVOKE (p->w, p->events);
954	}	1576	}
955	}	1577	}
956	}	1578	}
957		1579
958	static void	1580	#if EV_IDLE_ENABLE
		1581	void inline_size
		1582	idle_reify (EV_P)
		1583	{
		1584	if (expect_false (idleall))
		1585	{
		1586	int pri;
		1587
		1588	for (pri = NUMPRI; pri--; )
		1589	{
		1590	if (pendingcnt [pri])
		1591	break;
		1592
		1593	if (idlecnt [pri])
		1594	{
		1595	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1596	break;
		1597	}
		1598	}
		1599	}
		1600	}
		1601	#endif
		1602
		1603	void inline_size
959	timers_reify (EV_P)	1604	timers_reify (EV_P)
960	{	1605	{
961	while (timercnt && ((WT)timers [0])->at <= mn_now)	1606	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
962	{	1607	{
963	struct ev_timer *w = timers [0];	1608	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
964		1609
965	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1610	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
966		1611
967	/* first reschedule or stop timer */	1612	/* first reschedule or stop timer */
968	if (w->repeat)	1613	if (w->repeat)
969	{	1614	{
		1615	ev_at (w) += w->repeat;
		1616	if (ev_at (w) < mn_now)
		1617	ev_at (w) = mn_now;
		1618
970	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1619	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
971	((WT)w)->at = mn_now + w->repeat;	1620
		1621	ANHE_at_set (timers [HEAP0]);
972	downheap ((WT *)timers, timercnt, 0);	1622	downheap (timers, timercnt, HEAP0);
973	}	1623	}
974	else	1624	else
975	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1625	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
976		1626
977	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1627	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
978	}	1628	}
979	}	1629	}
980		1630
981	static void	1631	#if EV_PERIODIC_ENABLE
		1632	void inline_size
982	periodics_reify (EV_P)	1633	periodics_reify (EV_P)
983	{	1634	{
984	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1635	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
985	{	1636	{
986	struct ev_periodic *w = periodics [0];	1637	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
987		1638
988	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1639	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
989		1640
990	/* first reschedule or stop timer */	1641	/* first reschedule or stop timer */
991	if (w->reschedule_cb)	1642	if (w->reschedule_cb)
992	{	1643	{
993	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);	1644	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
994		1645
995	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));	1646	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1647
		1648	ANHE_at_set (periodics [HEAP0]);
996	downheap ((WT *)periodics, periodiccnt, 0);	1649	downheap (periodics, periodiccnt, HEAP0);
997	}	1650	}
998	else if (w->interval)	1651	else if (w->interval)
999	{	1652	{
1000	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1653	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1654	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1655
1001	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1656	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) >= ev_rt_now));
		1657
		1658	ANHE_at_set (periodics [HEAP0]);
1002	downheap ((WT *)periodics, periodiccnt, 0);	1659	downheap (periodics, periodiccnt, HEAP0);
1003	}	1660	}
1004	else	1661	else
1005	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1662	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1006		1663
1007	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1664	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1008	}	1665	}
1009	}	1666	}
1010		1667
1011	static void	1668	static void noinline
1012	periodics_reschedule (EV_P)	1669	periodics_reschedule (EV_P)
1013	{	1670	{
1014	int i;	1671	int i;
1015		1672
1016	/* adjust periodics after time jump */	1673	/* adjust periodics after time jump */
		1674	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1675	{
		1676	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1677
		1678	if (w->reschedule_cb)
		1679	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1680	else if (w->interval)
		1681	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1682
		1683	ANHE_at_set (periodics [i]);
		1684	}
		1685
		1686	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1687	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
1017	for (i = 0; i < periodiccnt; ++i)	1688	for (i = 0; i < periodiccnt; ++i)
1018	{	1689	upheap (periodics, i + HEAP0);
1019	struct ev_periodic *w = periodics [i];
1020
1021	if (w->reschedule_cb)
1022	((WT)w)->at = w->reschedule_cb (w, rt_now);
1023	else if (w->interval)
1024	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1025	}
1026
1027	/* now rebuild the heap */
1028	for (i = periodiccnt >> 1; i--; )
1029	downheap ((WT *)periodics, periodiccnt, i);
1030	}	1690	}
		1691	#endif
1031		1692
1032	inline int	1693	void inline_speed
1033	time_update_monotonic (EV_P)	1694	time_update (EV_P_ ev_tstamp max_block)
1034	{
1035	mn_now = get_clock ();
1036
1037	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1038	{
1039	rt_now = rtmn_diff + mn_now;
1040	return 0;
1041	}
1042	else
1043	{
1044	now_floor = mn_now;
1045	rt_now = ev_time ();
1046	return 1;
1047	}
1048	}
1049
1050	static void
1051	time_update (EV_P)
1052	{	1695	{
1053	int i;	1696	int i;
1054		1697
1055	#if EV_USE_MONOTONIC	1698	#if EV_USE_MONOTONIC
1056	if (expect_true (have_monotonic))	1699	if (expect_true (have_monotonic))
1057	{	1700	{
1058	if (time_update_monotonic (EV_A))	1701	ev_tstamp odiff = rtmn_diff;
		1702
		1703	mn_now = get_clock ();
		1704
		1705	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1706	/* interpolate in the meantime */
		1707	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059	{	1708	{
1060	ev_tstamp odiff = rtmn_diff;	1709	ev_rt_now = rtmn_diff + mn_now;
		1710	return;
		1711	}
1061		1712
		1713	now_floor = mn_now;
		1714	ev_rt_now = ev_time ();
		1715
1062	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1716	/* loop a few times, before making important decisions.
		1717	* on the choice of "4": one iteration isn't enough,
		1718	* in case we get preempted during the calls to
		1719	* ev_time and get_clock. a second call is almost guaranteed
		1720	* to succeed in that case, though. and looping a few more times
		1721	* doesn't hurt either as we only do this on time-jumps or
		1722	* in the unlikely event of having been preempted here.
		1723	*/
		1724	for (i = 4; --i; )
		1725	{
		1726	rtmn_diff = ev_rt_now - mn_now;
		1727
		1728	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1729	return; /* all is well */
		1730
		1731	ev_rt_now = ev_time ();
		1732	mn_now = get_clock ();
		1733	now_floor = mn_now;
		1734	}
		1735
		1736	# if EV_PERIODIC_ENABLE
		1737	periodics_reschedule (EV_A);
		1738	# endif
		1739	/* no timer adjustment, as the monotonic clock doesn't jump */
		1740	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1741	}
		1742	else
		1743	#endif
		1744	{
		1745	ev_rt_now = ev_time ();
		1746
		1747	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1748	{
		1749	#if EV_PERIODIC_ENABLE
		1750	periodics_reschedule (EV_A);
		1751	#endif
		1752	/* adjust timers. this is easy, as the offset is the same for all of them */
		1753	for (i = 0; i < timercnt; ++i)
1063	{	1754	{
1064	rtmn_diff = rt_now - mn_now;	1755	ANHE *he = timers + i + HEAP0;
1065		1756	ANHE_w (*he)->at += ev_rt_now - mn_now;
1066	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1757	ANHE_at_set (*he);
1067	return; /* all is well */
1068
1069	rt_now = ev_time ();
1070	mn_now = get_clock ();
1071	now_floor = mn_now;
1072	}	1758	}
1073
1074	periodics_reschedule (EV_A);
1075	/* no timer adjustment, as the monotonic clock doesn't jump */
1076	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1077	}	1759	}
1078	}
1079	else
1080	#endif
1081	{
1082	rt_now = ev_time ();
1083		1760
1084	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1085	{
1086	periodics_reschedule (EV_A);
1087
1088	/* adjust timers. this is easy, as the offset is the same for all */
1089	for (i = 0; i < timercnt; ++i)
1090	((WT)timers [i])->at += rt_now - mn_now;
1091	}
1092
1093	mn_now = rt_now;	1761	mn_now = ev_rt_now;
1094	}	1762	}
1095	}	1763	}
1096		1764
1097	void	1765	void
1098	ev_ref (EV_P)	1766	ev_ref (EV_P)
…		…
1109	static int loop_done;	1777	static int loop_done;
1110		1778
1111	void	1779	void
1112	ev_loop (EV_P_ int flags)	1780	ev_loop (EV_P_ int flags)
1113	{	1781	{
1114	double block;	1782	loop_done = EVUNLOOP_CANCEL;
1115	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1783
		1784	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1116		1785
1117	do	1786	do
1118	{	1787	{
		1788	#ifndef _WIN32
		1789	if (expect_false (curpid)) /* penalise the forking check even more */
		1790	if (expect_false (getpid () != curpid))
		1791	{
		1792	curpid = getpid ();
		1793	postfork = 1;
		1794	}
		1795	#endif
		1796
		1797	#if EV_FORK_ENABLE
		1798	/* we might have forked, so queue fork handlers */
		1799	if (expect_false (postfork))
		1800	if (forkcnt)
		1801	{
		1802	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1803	call_pending (EV_A);
		1804	}
		1805	#endif
		1806
1119	/* queue check watchers (and execute them) */	1807	/* queue prepare watchers (and execute them) */
1120	if (expect_false (preparecnt))	1808	if (expect_false (preparecnt))
1121	{	1809	{
1122	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1810	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1123	call_pending (EV_A);	1811	call_pending (EV_A);
1124	}	1812	}
1125		1813
		1814	if (expect_false (!activecnt))
		1815	break;
		1816
1126	/* we might have forked, so reify kernel state if necessary */	1817	/* we might have forked, so reify kernel state if necessary */
1127	if (expect_false (postfork))	1818	if (expect_false (postfork))
1128	loop_fork (EV_A);	1819	loop_fork (EV_A);
1129		1820
1130	/* update fd-related kernel structures */	1821	/* update fd-related kernel structures */
1131	fd_reify (EV_A);	1822	fd_reify (EV_A);
1132		1823
1133	/* calculate blocking time */	1824	/* calculate blocking time */
		1825	{
		1826	ev_tstamp waittime = 0.;
		1827	ev_tstamp sleeptime = 0.;
1134		1828
1135	/* we only need this for !monotonic clock or timers, but as we basically	1829	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1136	always have timers, we just calculate it always */
1137	#if EV_USE_MONOTONIC
1138	if (expect_true (have_monotonic))
1139	time_update_monotonic (EV_A);
1140	else
1141	#endif
1142	{	1830	{
1143	rt_now = ev_time ();	1831	/* update time to cancel out callback processing overhead */
1144	mn_now = rt_now;	1832	time_update (EV_A_ 1e100);
1145	}
1146		1833
1147	if (flags & EVLOOP_NONBLOCK || idlecnt)
1148	block = 0.;
1149	else
1150	{
1151	block = MAX_BLOCKTIME;	1834	waittime = MAX_BLOCKTIME;
1152		1835
1153	if (timercnt)	1836	if (timercnt)
1154	{	1837	{
1155	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1838	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1156	if (block > to) block = to;	1839	if (waittime > to) waittime = to;
1157	}	1840	}
1158		1841
		1842	#if EV_PERIODIC_ENABLE
1159	if (periodiccnt)	1843	if (periodiccnt)
1160	{	1844	{
1161	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1845	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1162	if (block > to) block = to;	1846	if (waittime > to) waittime = to;
1163	}	1847	}
		1848	#endif
1164		1849
1165	if (block < 0.) block = 0.;	1850	if (expect_false (waittime < timeout_blocktime))
		1851	waittime = timeout_blocktime;
		1852
		1853	sleeptime = waittime - backend_fudge;
		1854
		1855	if (expect_true (sleeptime > io_blocktime))
		1856	sleeptime = io_blocktime;
		1857
		1858	if (sleeptime)
		1859	{
		1860	ev_sleep (sleeptime);
		1861	waittime -= sleeptime;
		1862	}
1166	}	1863	}
1167		1864
1168	method_poll (EV_A_ block);	1865	++loop_count;
		1866	backend_poll (EV_A_ waittime);
1169		1867
1170	/* update rt_now, do magic */	1868	/* update ev_rt_now, do magic */
1171	time_update (EV_A);	1869	time_update (EV_A_ waittime + sleeptime);
		1870	}
1172		1871
1173	/* queue pending timers and reschedule them */	1872	/* queue pending timers and reschedule them */
1174	timers_reify (EV_A); /* relative timers called last */	1873	timers_reify (EV_A); /* relative timers called last */
		1874	#if EV_PERIODIC_ENABLE
1175	periodics_reify (EV_A); /* absolute timers called first */	1875	periodics_reify (EV_A); /* absolute timers called first */
		1876	#endif
1176		1877
		1878	#if EV_IDLE_ENABLE
1177	/* queue idle watchers unless io or timers are pending */	1879	/* queue idle watchers unless other events are pending */
1178	if (idlecnt && !any_pending (EV_A))	1880	idle_reify (EV_A);
1179	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1881	#endif
1180		1882
1181	/* queue check watchers, to be executed first */	1883	/* queue check watchers, to be executed first */
1182	if (checkcnt)	1884	if (expect_false (checkcnt))
1183	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1885	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1184		1886
1185	call_pending (EV_A);	1887	call_pending (EV_A);
1186	}	1888	}
1187	while (activecnt && !loop_done);	1889	while (expect_true (
		1890	activecnt
		1891	&& !loop_done
		1892	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1893	));
1188		1894
1189	if (loop_done != 2)	1895	if (loop_done == EVUNLOOP_ONE)
1190	loop_done = 0;	1896	loop_done = EVUNLOOP_CANCEL;
1191	}	1897	}
1192		1898
1193	void	1899	void
1194	ev_unloop (EV_P_ int how)	1900	ev_unloop (EV_P_ int how)
1195	{	1901	{
1196	loop_done = how;	1902	loop_done = how;
1197	}	1903	}
1198		1904
1199	/*****************************************************************************/	1905	/*****************************************************************************/
1200		1906
1201	inline void	1907	void inline_size
1202	wlist_add (WL *head, WL elem)	1908	wlist_add (WL *head, WL elem)
1203	{	1909	{
1204	elem->next = *head;	1910	elem->next = *head;
1205	*head = elem;	1911	*head = elem;
1206	}	1912	}
1207		1913
1208	inline void	1914	void inline_size
1209	wlist_del (WL *head, WL elem)	1915	wlist_del (WL *head, WL elem)
1210	{	1916	{
1211	while (*head)	1917	while (*head)
1212	{	1918	{
1213	if (*head == elem)	1919	if (*head == elem)
…		…
1218		1924
1219	head = &(*head)->next;	1925	head = &(*head)->next;
1220	}	1926	}
1221	}	1927	}
1222		1928
1223	inline void	1929	void inline_speed
1224	ev_clear_pending (EV_P_ W w)	1930	clear_pending (EV_P_ W w)
1225	{	1931	{
1226	if (w->pending)	1932	if (w->pending)
1227	{	1933	{
1228	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1934	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1229	w->pending = 0;	1935	w->pending = 0;
1230	}	1936	}
1231	}	1937	}
1232		1938
1233	inline void	1939	int
		1940	ev_clear_pending (EV_P_ void *w)
		1941	{
		1942	W w_ = (W)w;
		1943	int pending = w_->pending;
		1944
		1945	if (expect_true (pending))
		1946	{
		1947	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1948	w_->pending = 0;
		1949	p->w = 0;
		1950	return p->events;
		1951	}
		1952	else
		1953	return 0;
		1954	}
		1955
		1956	void inline_size
		1957	pri_adjust (EV_P_ W w)
		1958	{
		1959	int pri = w->priority;
		1960	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1961	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1962	w->priority = pri;
		1963	}
		1964
		1965	void inline_speed
1234	ev_start (EV_P_ W w, int active)	1966	ev_start (EV_P_ W w, int active)
1235	{	1967	{
1236	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1968	pri_adjust (EV_A_ w);
1237	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1238
1239	w->active = active;	1969	w->active = active;
1240	ev_ref (EV_A);	1970	ev_ref (EV_A);
1241	}	1971	}
1242		1972
1243	inline void	1973	void inline_size
1244	ev_stop (EV_P_ W w)	1974	ev_stop (EV_P_ W w)
1245	{	1975	{
1246	ev_unref (EV_A);	1976	ev_unref (EV_A);
1247	w->active = 0;	1977	w->active = 0;
1248	}	1978	}
1249		1979
1250	/*****************************************************************************/	1980	/*****************************************************************************/
1251		1981
1252	void	1982	void noinline
1253	ev_io_start (EV_P_ struct ev_io *w)	1983	ev_io_start (EV_P_ ev_io *w)
1254	{	1984	{
1255	int fd = w->fd;	1985	int fd = w->fd;
1256		1986
1257	if (ev_is_active (w))	1987	if (expect_false (ev_is_active (w)))
1258	return;	1988	return;
1259		1989
1260	assert (("ev_io_start called with negative fd", fd >= 0));	1990	assert (("ev_io_start called with negative fd", fd >= 0));
1261		1991
1262	ev_start (EV_A_ (W)w, 1);	1992	ev_start (EV_A_ (W)w, 1);
1263	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1993	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1264	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1994	wlist_add (&anfds[fd].head, (WL)w);
1265		1995
1266	fd_change (EV_A_ fd);	1996	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1997	w->events &= ~EV_IOFDSET;
1267	}	1998	}
1268		1999
1269	void	2000	void noinline
1270	ev_io_stop (EV_P_ struct ev_io *w)	2001	ev_io_stop (EV_P_ ev_io *w)
1271	{	2002	{
1272	ev_clear_pending (EV_A_ (W)w);	2003	clear_pending (EV_A_ (W)w);
1273	if (!ev_is_active (w))	2004	if (expect_false (!ev_is_active (w)))
1274	return;	2005	return;
1275		2006
		2007	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2008
1276	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2009	wlist_del (&anfds[w->fd].head, (WL)w);
1277	ev_stop (EV_A_ (W)w);	2010	ev_stop (EV_A_ (W)w);
1278		2011
1279	fd_change (EV_A_ w->fd);	2012	fd_change (EV_A_ w->fd, 1);
1280	}	2013	}
1281		2014
1282	void	2015	void noinline
1283	ev_timer_start (EV_P_ struct ev_timer *w)	2016	ev_timer_start (EV_P_ ev_timer *w)
1284	{	2017	{
1285	if (ev_is_active (w))	2018	if (expect_false (ev_is_active (w)))
1286	return;	2019	return;
1287		2020
1288	((WT)w)->at += mn_now;	2021	ev_at (w) += mn_now;
1289		2022
1290	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2023	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1291		2024
1292	ev_start (EV_A_ (W)w, ++timercnt);	2025	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1293	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));	2026	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1294	timers [timercnt - 1] = w;	2027	ANHE_w (timers [ev_active (w)]) = (WT)w;
1295	upheap ((WT *)timers, timercnt - 1);	2028	ANHE_at_set (timers [ev_active (w)]);
		2029	upheap (timers, ev_active (w));
1296		2030
1297	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2031	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1298	}	2032	}
1299		2033
1300	void	2034	void noinline
1301	ev_timer_stop (EV_P_ struct ev_timer *w)	2035	ev_timer_stop (EV_P_ ev_timer *w)
1302	{	2036	{
1303	ev_clear_pending (EV_A_ (W)w);	2037	clear_pending (EV_A_ (W)w);
1304	if (!ev_is_active (w))	2038	if (expect_false (!ev_is_active (w)))
1305	return;	2039	return;
1306		2040
		2041	{
		2042	int active = ev_active (w);
		2043
1307	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2044	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1308		2045
1309	if (((W)w)->active < timercnt--)	2046	if (expect_true (active < timercnt + HEAP0 - 1))
1310	{	2047	{
1311	timers [((W)w)->active - 1] = timers [timercnt];	2048	timers [active] = timers [timercnt + HEAP0 - 1];
1312	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2049	adjustheap (timers, timercnt, active);
1313	}	2050	}
1314		2051
1315	((WT)w)->at = w->repeat;	2052	--timercnt;
		2053	}
		2054
		2055	ev_at (w) -= mn_now;
1316		2056
1317	ev_stop (EV_A_ (W)w);	2057	ev_stop (EV_A_ (W)w);
1318	}	2058	}
1319		2059
1320	void	2060	void noinline
1321	ev_timer_again (EV_P_ struct ev_timer *w)	2061	ev_timer_again (EV_P_ ev_timer *w)
1322	{	2062	{
1323	if (ev_is_active (w))	2063	if (ev_is_active (w))
1324	{	2064	{
1325	if (w->repeat)	2065	if (w->repeat)
1326	{	2066	{
1327	((WT)w)->at = mn_now + w->repeat;	2067	ev_at (w) = mn_now + w->repeat;
1328	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2068	ANHE_at_set (timers [ev_active (w)]);
		2069	adjustheap (timers, timercnt, ev_active (w));
1329	}	2070	}
1330	else	2071	else
1331	ev_timer_stop (EV_A_ w);	2072	ev_timer_stop (EV_A_ w);
1332	}	2073	}
1333	else if (w->repeat)	2074	else if (w->repeat)
		2075	{
		2076	ev_at (w) = w->repeat;
1334	ev_timer_start (EV_A_ w);	2077	ev_timer_start (EV_A_ w);
		2078	}
1335	}	2079	}
1336		2080
1337	void	2081	#if EV_PERIODIC_ENABLE
		2082	void noinline
1338	ev_periodic_start (EV_P_ struct ev_periodic *w)	2083	ev_periodic_start (EV_P_ ev_periodic *w)
1339	{	2084	{
1340	if (ev_is_active (w))	2085	if (expect_false (ev_is_active (w)))
1341	return;	2086	return;
1342		2087
1343	if (w->reschedule_cb)	2088	if (w->reschedule_cb)
1344	((WT)w)->at = w->reschedule_cb (w, rt_now);	2089	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1345	else if (w->interval)	2090	else if (w->interval)
1346	{	2091	{
1347	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2092	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1348	/* this formula differs from the one in periodic_reify because we do not always round up */	2093	/* this formula differs from the one in periodic_reify because we do not always round up */
1349	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	2094	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1350	}	2095	}
		2096	else
		2097	ev_at (w) = w->offset;
1351		2098
1352	ev_start (EV_A_ (W)w, ++periodiccnt);	2099	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1353	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));	2100	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1354	periodics [periodiccnt - 1] = w;	2101	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1355	upheap ((WT *)periodics, periodiccnt - 1);	2102	ANHE_at_set (periodics [ev_active (w)]);
		2103	upheap (periodics, ev_active (w));
1356		2104
1357	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2105	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1358	}	2106	}
1359		2107
1360	void	2108	void noinline
1361	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2109	ev_periodic_stop (EV_P_ ev_periodic *w)
1362	{	2110	{
1363	ev_clear_pending (EV_A_ (W)w);	2111	clear_pending (EV_A_ (W)w);
1364	if (!ev_is_active (w))	2112	if (expect_false (!ev_is_active (w)))
1365	return;	2113	return;
1366		2114
		2115	{
		2116	int active = ev_active (w);
		2117
1367	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2118	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1368		2119
1369	if (((W)w)->active < periodiccnt--)	2120	if (expect_true (active < periodiccnt + HEAP0 - 1))
1370	{	2121	{
1371	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2122	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1372	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2123	adjustheap (periodics, periodiccnt, active);
1373	}	2124	}
		2125
		2126	--periodiccnt;
		2127	}
1374		2128
1375	ev_stop (EV_A_ (W)w);	2129	ev_stop (EV_A_ (W)w);
1376	}	2130	}
1377		2131
1378	void	2132	void noinline
1379	ev_periodic_again (EV_P_ struct ev_periodic *w)	2133	ev_periodic_again (EV_P_ ev_periodic *w)
1380	{	2134	{
		2135	/* TODO: use adjustheap and recalculation */
1381	ev_periodic_stop (EV_A_ w);	2136	ev_periodic_stop (EV_A_ w);
1382	ev_periodic_start (EV_A_ w);	2137	ev_periodic_start (EV_A_ w);
1383	}	2138	}
1384		2139	#endif
1385	void
1386	ev_idle_start (EV_P_ struct ev_idle *w)
1387	{
1388	if (ev_is_active (w))
1389	return;
1390
1391	ev_start (EV_A_ (W)w, ++idlecnt);
1392	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1393	idles [idlecnt - 1] = w;
1394	}
1395
1396	void
1397	ev_idle_stop (EV_P_ struct ev_idle *w)
1398	{
1399	ev_clear_pending (EV_A_ (W)w);
1400	if (ev_is_active (w))
1401	return;
1402
1403	idles [((W)w)->active - 1] = idles [--idlecnt];
1404	ev_stop (EV_A_ (W)w);
1405	}
1406
1407	void
1408	ev_prepare_start (EV_P_ struct ev_prepare *w)
1409	{
1410	if (ev_is_active (w))
1411	return;
1412
1413	ev_start (EV_A_ (W)w, ++preparecnt);
1414	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1415	prepares [preparecnt - 1] = w;
1416	}
1417
1418	void
1419	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1420	{
1421	ev_clear_pending (EV_A_ (W)w);
1422	if (ev_is_active (w))
1423	return;
1424
1425	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1426	ev_stop (EV_A_ (W)w);
1427	}
1428
1429	void
1430	ev_check_start (EV_P_ struct ev_check *w)
1431	{
1432	if (ev_is_active (w))
1433	return;
1434
1435	ev_start (EV_A_ (W)w, ++checkcnt);
1436	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1437	checks [checkcnt - 1] = w;
1438	}
1439
1440	void
1441	ev_check_stop (EV_P_ struct ev_check *w)
1442	{
1443	ev_clear_pending (EV_A_ (W)w);
1444	if (ev_is_active (w))
1445	return;
1446
1447	checks [((W)w)->active - 1] = checks [--checkcnt];
1448	ev_stop (EV_A_ (W)w);
1449	}
1450		2140
1451	#ifndef SA_RESTART	2141	#ifndef SA_RESTART
1452	# define SA_RESTART 0	2142	# define SA_RESTART 0
1453	#endif	2143	#endif
1454		2144
1455	void	2145	void noinline
1456	ev_signal_start (EV_P_ struct ev_signal *w)	2146	ev_signal_start (EV_P_ ev_signal *w)
1457	{	2147	{
1458	#if EV_MULTIPLICITY	2148	#if EV_MULTIPLICITY
1459	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2149	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1460	#endif	2150	#endif
1461	if (ev_is_active (w))	2151	if (expect_false (ev_is_active (w)))
1462	return;	2152	return;
1463		2153
1464	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2154	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1465		2155
		2156	evpipe_init (EV_A);
		2157
		2158	{
		2159	#ifndef _WIN32
		2160	sigset_t full, prev;
		2161	sigfillset (&full);
		2162	sigprocmask (SIG_SETMASK, &full, &prev);
		2163	#endif
		2164
		2165	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2166
		2167	#ifndef _WIN32
		2168	sigprocmask (SIG_SETMASK, &prev, 0);
		2169	#endif
		2170	}
		2171
1466	ev_start (EV_A_ (W)w, 1);	2172	ev_start (EV_A_ (W)w, 1);
1467	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1468	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2173	wlist_add (&signals [w->signum - 1].head, (WL)w);
1469		2174
1470	if (!((WL)w)->next)	2175	if (!((WL)w)->next)
1471	{	2176	{
1472	#if WIN32	2177	#if _WIN32
1473	signal (w->signum, sighandler);	2178	signal (w->signum, ev_sighandler);
1474	#else	2179	#else
1475	struct sigaction sa;	2180	struct sigaction sa;
1476	sa.sa_handler = sighandler;	2181	sa.sa_handler = ev_sighandler;
1477	sigfillset (&sa.sa_mask);	2182	sigfillset (&sa.sa_mask);
1478	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2183	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1479	sigaction (w->signum, &sa, 0);	2184	sigaction (w->signum, &sa, 0);
1480	#endif	2185	#endif
1481	}	2186	}
1482	}	2187	}
1483		2188
1484	void	2189	void noinline
1485	ev_signal_stop (EV_P_ struct ev_signal *w)	2190	ev_signal_stop (EV_P_ ev_signal *w)
1486	{	2191	{
1487	ev_clear_pending (EV_A_ (W)w);	2192	clear_pending (EV_A_ (W)w);
1488	if (!ev_is_active (w))	2193	if (expect_false (!ev_is_active (w)))
1489	return;	2194	return;
1490		2195
1491	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2196	wlist_del (&signals [w->signum - 1].head, (WL)w);
1492	ev_stop (EV_A_ (W)w);	2197	ev_stop (EV_A_ (W)w);
1493		2198
1494	if (!signals [w->signum - 1].head)	2199	if (!signals [w->signum - 1].head)
1495	signal (w->signum, SIG_DFL);	2200	signal (w->signum, SIG_DFL);
1496	}	2201	}
1497		2202
1498	void	2203	void
1499	ev_child_start (EV_P_ struct ev_child *w)	2204	ev_child_start (EV_P_ ev_child *w)
1500	{	2205	{
1501	#if EV_MULTIPLICITY	2206	#if EV_MULTIPLICITY
1502	assert (("child watchers are only supported in the default loop", loop == default_loop));	2207	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1503	#endif	2208	#endif
1504	if (ev_is_active (w))	2209	if (expect_false (ev_is_active (w)))
1505	return;	2210	return;
1506		2211
1507	ev_start (EV_A_ (W)w, 1);	2212	ev_start (EV_A_ (W)w, 1);
1508	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2213	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1509	}	2214	}
1510		2215
1511	void	2216	void
1512	ev_child_stop (EV_P_ struct ev_child *w)	2217	ev_child_stop (EV_P_ ev_child *w)
1513	{	2218	{
1514	ev_clear_pending (EV_A_ (W)w);	2219	clear_pending (EV_A_ (W)w);
1515	if (ev_is_active (w))	2220	if (expect_false (!ev_is_active (w)))
1516	return;	2221	return;
1517		2222
1518	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2223	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1519	ev_stop (EV_A_ (W)w);	2224	ev_stop (EV_A_ (W)w);
1520	}	2225	}
1521		2226
		2227	#if EV_STAT_ENABLE
		2228
		2229	# ifdef _WIN32
		2230	# undef lstat
		2231	# define lstat(a,b) _stati64 (a,b)
		2232	# endif
		2233
		2234	#define DEF_STAT_INTERVAL 5.0074891
		2235	#define MIN_STAT_INTERVAL 0.1074891
		2236
		2237	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2238
		2239	#if EV_USE_INOTIFY
		2240	# define EV_INOTIFY_BUFSIZE 8192
		2241
		2242	static void noinline
		2243	infy_add (EV_P_ ev_stat *w)
		2244	{
		2245	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);
		2246
		2247	if (w->wd < 0)
		2248	{
		2249	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2250
		2251	/* monitor some parent directory for speedup hints */
		2252	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2253	/* but an efficiency issue only */
		2254	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2255	{
		2256	char path [4096];
		2257	strcpy (path, w->path);
		2258
		2259	do
		2260	{
		2261	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2262	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2263
		2264	char *pend = strrchr (path, '/');
		2265
		2266	if (!pend)
		2267	break; /* whoops, no '/', complain to your admin */
		2268
		2269	*pend = 0;
		2270	w->wd = inotify_add_watch (fs_fd, path, mask);
		2271	}
		2272	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2273	}
		2274	}
		2275	else
		2276	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2277
		2278	if (w->wd >= 0)
		2279	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2280	}
		2281
		2282	static void noinline
		2283	infy_del (EV_P_ ev_stat *w)
		2284	{
		2285	int slot;
		2286	int wd = w->wd;
		2287
		2288	if (wd < 0)
		2289	return;
		2290
		2291	w->wd = -2;
		2292	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2293	wlist_del (&fs_hash [slot].head, (WL)w);
		2294
		2295	/* remove this watcher, if others are watching it, they will rearm */
		2296	inotify_rm_watch (fs_fd, wd);
		2297	}
		2298
		2299	static void noinline
		2300	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2301	{
		2302	if (slot < 0)
		2303	/* overflow, need to check for all hahs slots */
		2304	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2305	infy_wd (EV_A_ slot, wd, ev);
		2306	else
		2307	{
		2308	WL w_;
		2309
		2310	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2311	{
		2312	ev_stat *w = (ev_stat *)w_;
		2313	w_ = w_->next; /* lets us remove this watcher and all before it */
		2314
		2315	if (w->wd == wd || wd == -1)
		2316	{
		2317	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2318	{
		2319	w->wd = -1;
		2320	infy_add (EV_A_ w); /* re-add, no matter what */
		2321	}
		2322
		2323	stat_timer_cb (EV_A_ &w->timer, 0);
		2324	}
		2325	}
		2326	}
		2327	}
		2328
		2329	static void
		2330	infy_cb (EV_P_ ev_io *w, int revents)
		2331	{
		2332	char buf [EV_INOTIFY_BUFSIZE];
		2333	struct inotify_event *ev = (struct inotify_event *)buf;
		2334	int ofs;
		2335	int len = read (fs_fd, buf, sizeof (buf));
		2336
		2337	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2338	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2339	}
		2340
		2341	void inline_size
		2342	infy_init (EV_P)
		2343	{
		2344	if (fs_fd != -2)
		2345	return;
		2346
		2347	fs_fd = inotify_init ();
		2348
		2349	if (fs_fd >= 0)
		2350	{
		2351	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2352	ev_set_priority (&fs_w, EV_MAXPRI);
		2353	ev_io_start (EV_A_ &fs_w);
		2354	}
		2355	}
		2356
		2357	void inline_size
		2358	infy_fork (EV_P)
		2359	{
		2360	int slot;
		2361
		2362	if (fs_fd < 0)
		2363	return;
		2364
		2365	close (fs_fd);
		2366	fs_fd = inotify_init ();
		2367
		2368	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2369	{
		2370	WL w_ = fs_hash [slot].head;
		2371	fs_hash [slot].head = 0;
		2372
		2373	while (w_)
		2374	{
		2375	ev_stat *w = (ev_stat *)w_;
		2376	w_ = w_->next; /* lets us add this watcher */
		2377
		2378	w->wd = -1;
		2379
		2380	if (fs_fd >= 0)
		2381	infy_add (EV_A_ w); /* re-add, no matter what */
		2382	else
		2383	ev_timer_start (EV_A_ &w->timer);
		2384	}
		2385
		2386	}
		2387	}
		2388
		2389	#endif
		2390
		2391	void
		2392	ev_stat_stat (EV_P_ ev_stat *w)
		2393	{
		2394	if (lstat (w->path, &w->attr) < 0)
		2395	w->attr.st_nlink = 0;
		2396	else if (!w->attr.st_nlink)
		2397	w->attr.st_nlink = 1;
		2398	}
		2399
		2400	static void noinline
		2401	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2402	{
		2403	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2404
		2405	/* we copy this here each the time so that */
		2406	/* prev has the old value when the callback gets invoked */
		2407	w->prev = w->attr;
		2408	ev_stat_stat (EV_A_ w);
		2409
		2410	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2411	if (
		2412	w->prev.st_dev != w->attr.st_dev
		2413	|| w->prev.st_ino != w->attr.st_ino
		2414	|| w->prev.st_mode != w->attr.st_mode
		2415	|| w->prev.st_nlink != w->attr.st_nlink
		2416	|| w->prev.st_uid != w->attr.st_uid
		2417	|| w->prev.st_gid != w->attr.st_gid
		2418	|| w->prev.st_rdev != w->attr.st_rdev
		2419	|| w->prev.st_size != w->attr.st_size
		2420	|| w->prev.st_atime != w->attr.st_atime
		2421	|| w->prev.st_mtime != w->attr.st_mtime
		2422	|| w->prev.st_ctime != w->attr.st_ctime
		2423	) {
		2424	#if EV_USE_INOTIFY
		2425	infy_del (EV_A_ w);
		2426	infy_add (EV_A_ w);
		2427	ev_stat_stat (EV_A_ w); /* avoid race... */
		2428	#endif
		2429
		2430	ev_feed_event (EV_A_ w, EV_STAT);
		2431	}
		2432	}
		2433
		2434	void
		2435	ev_stat_start (EV_P_ ev_stat *w)
		2436	{
		2437	if (expect_false (ev_is_active (w)))
		2438	return;
		2439
		2440	/* since we use memcmp, we need to clear any padding data etc. */
		2441	memset (&w->prev, 0, sizeof (ev_statdata));
		2442	memset (&w->attr, 0, sizeof (ev_statdata));
		2443
		2444	ev_stat_stat (EV_A_ w);
		2445
		2446	if (w->interval < MIN_STAT_INTERVAL)
		2447	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2448
		2449	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2450	ev_set_priority (&w->timer, ev_priority (w));
		2451
		2452	#if EV_USE_INOTIFY
		2453	infy_init (EV_A);
		2454
		2455	if (fs_fd >= 0)
		2456	infy_add (EV_A_ w);
		2457	else
		2458	#endif
		2459	ev_timer_start (EV_A_ &w->timer);
		2460
		2461	ev_start (EV_A_ (W)w, 1);
		2462	}
		2463
		2464	void
		2465	ev_stat_stop (EV_P_ ev_stat *w)
		2466	{
		2467	clear_pending (EV_A_ (W)w);
		2468	if (expect_false (!ev_is_active (w)))
		2469	return;
		2470
		2471	#if EV_USE_INOTIFY
		2472	infy_del (EV_A_ w);
		2473	#endif
		2474	ev_timer_stop (EV_A_ &w->timer);
		2475
		2476	ev_stop (EV_A_ (W)w);
		2477	}
		2478	#endif
		2479
		2480	#if EV_IDLE_ENABLE
		2481	void
		2482	ev_idle_start (EV_P_ ev_idle *w)
		2483	{
		2484	if (expect_false (ev_is_active (w)))
		2485	return;
		2486
		2487	pri_adjust (EV_A_ (W)w);
		2488
		2489	{
		2490	int active = ++idlecnt [ABSPRI (w)];
		2491
		2492	++idleall;
		2493	ev_start (EV_A_ (W)w, active);
		2494
		2495	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2496	idles [ABSPRI (w)][active - 1] = w;
		2497	}
		2498	}
		2499
		2500	void
		2501	ev_idle_stop (EV_P_ ev_idle *w)
		2502	{
		2503	clear_pending (EV_A_ (W)w);
		2504	if (expect_false (!ev_is_active (w)))
		2505	return;
		2506
		2507	{
		2508	int active = ev_active (w);
		2509
		2510	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2511	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2512
		2513	ev_stop (EV_A_ (W)w);
		2514	--idleall;
		2515	}
		2516	}
		2517	#endif
		2518
		2519	void
		2520	ev_prepare_start (EV_P_ ev_prepare *w)
		2521	{
		2522	if (expect_false (ev_is_active (w)))
		2523	return;
		2524
		2525	ev_start (EV_A_ (W)w, ++preparecnt);
		2526	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2527	prepares [preparecnt - 1] = w;
		2528	}
		2529
		2530	void
		2531	ev_prepare_stop (EV_P_ ev_prepare *w)
		2532	{
		2533	clear_pending (EV_A_ (W)w);
		2534	if (expect_false (!ev_is_active (w)))
		2535	return;
		2536
		2537	{
		2538	int active = ev_active (w);
		2539
		2540	prepares [active - 1] = prepares [--preparecnt];
		2541	ev_active (prepares [active - 1]) = active;
		2542	}
		2543
		2544	ev_stop (EV_A_ (W)w);
		2545	}
		2546
		2547	void
		2548	ev_check_start (EV_P_ ev_check *w)
		2549	{
		2550	if (expect_false (ev_is_active (w)))
		2551	return;
		2552
		2553	ev_start (EV_A_ (W)w, ++checkcnt);
		2554	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2555	checks [checkcnt - 1] = w;
		2556	}
		2557
		2558	void
		2559	ev_check_stop (EV_P_ ev_check *w)
		2560	{
		2561	clear_pending (EV_A_ (W)w);
		2562	if (expect_false (!ev_is_active (w)))
		2563	return;
		2564
		2565	{
		2566	int active = ev_active (w);
		2567
		2568	checks [active - 1] = checks [--checkcnt];
		2569	ev_active (checks [active - 1]) = active;
		2570	}
		2571
		2572	ev_stop (EV_A_ (W)w);
		2573	}
		2574
		2575	#if EV_EMBED_ENABLE
		2576	void noinline
		2577	ev_embed_sweep (EV_P_ ev_embed *w)
		2578	{
		2579	ev_loop (w->other, EVLOOP_NONBLOCK);
		2580	}
		2581
		2582	static void
		2583	embed_io_cb (EV_P_ ev_io *io, int revents)
		2584	{
		2585	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2586
		2587	if (ev_cb (w))
		2588	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2589	else
		2590	ev_loop (w->other, EVLOOP_NONBLOCK);
		2591	}
		2592
		2593	static void
		2594	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2595	{
		2596	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2597
		2598	{
		2599	struct ev_loop *loop = w->other;
		2600
		2601	while (fdchangecnt)
		2602	{
		2603	fd_reify (EV_A);
		2604	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2605	}
		2606	}
		2607	}
		2608
		2609	#if 0
		2610	static void
		2611	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2612	{
		2613	ev_idle_stop (EV_A_ idle);
		2614	}
		2615	#endif
		2616
		2617	void
		2618	ev_embed_start (EV_P_ ev_embed *w)
		2619	{
		2620	if (expect_false (ev_is_active (w)))
		2621	return;
		2622
		2623	{
		2624	struct ev_loop *loop = w->other;
		2625	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2626	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2627	}
		2628
		2629	ev_set_priority (&w->io, ev_priority (w));
		2630	ev_io_start (EV_A_ &w->io);
		2631
		2632	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2633	ev_set_priority (&w->prepare, EV_MINPRI);
		2634	ev_prepare_start (EV_A_ &w->prepare);
		2635
		2636	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2637
		2638	ev_start (EV_A_ (W)w, 1);
		2639	}
		2640
		2641	void
		2642	ev_embed_stop (EV_P_ ev_embed *w)
		2643	{
		2644	clear_pending (EV_A_ (W)w);
		2645	if (expect_false (!ev_is_active (w)))
		2646	return;
		2647
		2648	ev_io_stop (EV_A_ &w->io);
		2649	ev_prepare_stop (EV_A_ &w->prepare);
		2650
		2651	ev_stop (EV_A_ (W)w);
		2652	}
		2653	#endif
		2654
		2655	#if EV_FORK_ENABLE
		2656	void
		2657	ev_fork_start (EV_P_ ev_fork *w)
		2658	{
		2659	if (expect_false (ev_is_active (w)))
		2660	return;
		2661
		2662	ev_start (EV_A_ (W)w, ++forkcnt);
		2663	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2664	forks [forkcnt - 1] = w;
		2665	}
		2666
		2667	void
		2668	ev_fork_stop (EV_P_ ev_fork *w)
		2669	{
		2670	clear_pending (EV_A_ (W)w);
		2671	if (expect_false (!ev_is_active (w)))
		2672	return;
		2673
		2674	{
		2675	int active = ev_active (w);
		2676
		2677	forks [active - 1] = forks [--forkcnt];
		2678	ev_active (forks [active - 1]) = active;
		2679	}
		2680
		2681	ev_stop (EV_A_ (W)w);
		2682	}
		2683	#endif
		2684
		2685	#if EV_ASYNC_ENABLE
		2686	void
		2687	ev_async_start (EV_P_ ev_async *w)
		2688	{
		2689	if (expect_false (ev_is_active (w)))
		2690	return;
		2691
		2692	evpipe_init (EV_A);
		2693
		2694	ev_start (EV_A_ (W)w, ++asynccnt);
		2695	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2696	asyncs [asynccnt - 1] = w;
		2697	}
		2698
		2699	void
		2700	ev_async_stop (EV_P_ ev_async *w)
		2701	{
		2702	clear_pending (EV_A_ (W)w);
		2703	if (expect_false (!ev_is_active (w)))
		2704	return;
		2705
		2706	{
		2707	int active = ev_active (w);
		2708
		2709	asyncs [active - 1] = asyncs [--asynccnt];
		2710	ev_active (asyncs [active - 1]) = active;
		2711	}
		2712
		2713	ev_stop (EV_A_ (W)w);
		2714	}
		2715
		2716	void
		2717	ev_async_send (EV_P_ ev_async *w)
		2718	{
		2719	w->sent = 1;
		2720	evpipe_write (EV_A_ &gotasync);
		2721	}
		2722	#endif
		2723
1522	/*****************************************************************************/	2724	/*****************************************************************************/
1523		2725
1524	struct ev_once	2726	struct ev_once
1525	{	2727	{
1526	struct ev_io io;	2728	ev_io io;
1527	struct ev_timer to;	2729	ev_timer to;
1528	void (*cb)(int revents, void *arg);	2730	void (*cb)(int revents, void *arg);
1529	void *arg;	2731	void *arg;
1530	};	2732	};
1531		2733
1532	static void	2734	static void
…		…
1541		2743
1542	cb (revents, arg);	2744	cb (revents, arg);
1543	}	2745	}
1544		2746
1545	static void	2747	static void
1546	once_cb_io (EV_P_ struct ev_io *w, int revents)	2748	once_cb_io (EV_P_ ev_io *w, int revents)
1547	{	2749	{
1548	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2750	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1549	}	2751	}
1550		2752
1551	static void	2753	static void
1552	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2754	once_cb_to (EV_P_ ev_timer *w, int revents)
1553	{	2755	{
1554	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2756	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1555	}	2757	}
1556		2758
1557	void	2759	void
1558	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2760	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1559	{	2761	{
1560	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	2762	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1561		2763
1562	if (!once)	2764	if (expect_false (!once))
		2765	{
1563	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2766	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1564	else	2767	return;
1565	{	2768	}
		2769
1566	once->cb = cb;	2770	once->cb = cb;
1567	once->arg = arg;	2771	once->arg = arg;
1568		2772
1569	ev_watcher_init (&once->io, once_cb_io);	2773	ev_init (&once->io, once_cb_io);
1570	if (fd >= 0)	2774	if (fd >= 0)
1571	{	2775	{
1572	ev_io_set (&once->io, fd, events);	2776	ev_io_set (&once->io, fd, events);
1573	ev_io_start (EV_A_ &once->io);	2777	ev_io_start (EV_A_ &once->io);
1574	}	2778	}
1575		2779
1576	ev_watcher_init (&once->to, once_cb_to);	2780	ev_init (&once->to, once_cb_to);
1577	if (timeout >= 0.)	2781	if (timeout >= 0.)
1578	{	2782	{
1579	ev_timer_set (&once->to, timeout, 0.);	2783	ev_timer_set (&once->to, timeout, 0.);
1580	ev_timer_start (EV_A_ &once->to);	2784	ev_timer_start (EV_A_ &once->to);
1581	}
1582	}	2785	}
1583	}	2786	}
1584		2787
		2788	#if EV_MULTIPLICITY
		2789	#include "ev_wrap.h"
		2790	#endif
		2791
		2792	#ifdef __cplusplus
		2793	}
		2794	#endif
		2795

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