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Comparing libev/ev.c (file contents):
Revision 1.105 by root, Mon Nov 12 01:02:09 2007 UTC vs.
Revision 1.236 by root, Wed May 7 14:46:22 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	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
37	# include "config.h"	49	# include "config.h"
		50	# endif
38		51
39	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
40	# ifndef EV_USE_MONOTONIC	53	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
42	# endif	55	# endif
43	# ifndef EV_USE_REALTIME	56	# ifndef EV_USE_REALTIME
44	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
45	# endif	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
46	# endif	66	# endif
47		67
48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
49	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
50	# endif	74	# endif
51		75
52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) && !defined (__APPLE__)	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
53	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
54	# endif	82	# endif
55		83
56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
57	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
58	# endif	90	# endif
59		91
60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) && !defined (__APPLE__)	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
62	# 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
63		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
64	#endif	132	#endif
65		133
66	#include <math.h>	134	#include <math.h>
67	#include <stdlib.h>	135	#include <stdlib.h>
68	#include <fcntl.h>	136	#include <fcntl.h>
…		…
75	#include <sys/types.h>	143	#include <sys/types.h>
76	#include <time.h>	144	#include <time.h>
77		145
78	#include <signal.h>	146	#include <signal.h>
79		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
80	#ifndef _WIN32	154	#ifndef _WIN32
81	# include <unistd.h>
82	# include <sys/time.h>	155	# include <sys/time.h>
83	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
84	#else	158	#else
85	# define WIN32_LEAN_AND_MEAN	159	# define WIN32_LEAN_AND_MEAN
86	# include <windows.h>	160	# include <windows.h>
87	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
88	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
89	# endif	163	# endif
90	#endif	164	#endif
91		165
92	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
93		167
94	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
95	# define EV_USE_MONOTONIC 1	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
96	#endif	178	#endif
97		179
98	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
99	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
100	# define EV_SELECT_USE_FD_SET 1
101	#endif	182	#endif
102		183
103	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
104	# ifdef _WIN32	185	# ifdef _WIN32
105	# define EV_USE_POLL 0	186	# define EV_USE_POLL 0
…		…
107	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
108	# endif	189	# endif
109	#endif	190	#endif
110		191
111	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
112	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
113	#endif	198	#endif
114		199
115	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
116	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
117	#endif	202	#endif
118		203
119	#ifndef EV_USE_REALTIME	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))
120	# define EV_USE_REALTIME 1	210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
121	#endif	213	# endif
		214	#endif
122		215
123	/**/	216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
124		241
125	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
126	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
127	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
128	#endif	245	#endif
…		…
130	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
131	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
132	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
133	#endif	250	#endif
134		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
135	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
136	# include <winsock.h>	268	# include <winsock.h>
137	#endif	269	#endif
138		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
139	/**/	283	/**/
140		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		294
141	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
142	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
143	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
144	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
145		298
146	#ifdef EV_H
147	# include EV_H
148	#else
149	# include "ev.h"
150	#endif
151
152	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
153	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
154	# define inline inline	301	# define noinline __attribute__ ((noinline))
155	#else	302	#else
156	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
157	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
158	#endif	308	#endif
159		309
160	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
161	#define expect_true(expr) expect ((expr) != 0, 1)	311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
162		319
163	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
164	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
165		322
166	#define EMPTY /* required for microsofts broken pseudo-c compiler */	323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
167		325
168	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
169	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
170	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
171		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
172	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
173		338
174	#ifdef _WIN32	339	#ifdef _WIN32
175	# include "ev_win32.c"	340	# include "ev_win32.c"
176	#endif	341	#endif
177		342
178	/*****************************************************************************/	343	/*****************************************************************************/
179		344
180	static void (*syserr_cb)(const char *msg);	345	static void (*syserr_cb)(const char *msg);
181		346
		347	void
182	void ev_set_syserr_cb (void (*cb)(const char *msg))	348	ev_set_syserr_cb (void (*cb)(const char *msg))
183	{	349	{
184	syserr_cb = cb;	350	syserr_cb = cb;
185	}	351	}
186		352
187	static void	353	static void noinline
188	syserr (const char *msg)	354	syserr (const char *msg)
189	{	355	{
190	if (!msg)	356	if (!msg)
191	msg = "(libev) system error";	357	msg = "(libev) system error";
192		358
…		…
197	perror (msg);	363	perror (msg);
198	abort ();	364	abort ();
199	}	365	}
200	}	366	}
201		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
202	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
203		384
		385	void
204	void ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
205	{	387	{
206	alloc = cb;	388	alloc = cb;
207	}	389	}
208		390
209	static void *	391	inline_speed void *
210	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
211	{	393	{
212	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
213		395
214	if (!ptr && size)	396	if (!ptr && size)
215	{	397	{
216	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
217	abort ();	399	abort ();
…		…
238	typedef struct	420	typedef struct
239	{	421	{
240	W w;	422	W w;
241	int events;	423	int events;
242	} ANPENDING;	424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
243		432
244	#if EV_MULTIPLICITY	433	#if EV_MULTIPLICITY
245		434
246	struct ev_loop	435	struct ev_loop
247	{	436	{
…		…
251	#include "ev_vars.h"	440	#include "ev_vars.h"
252	#undef VAR	441	#undef VAR
253	};	442	};
254	#include "ev_wrap.h"	443	#include "ev_wrap.h"
255		444
256	struct ev_loop default_loop_struct;	445	static struct ev_loop default_loop_struct;
257	static struct ev_loop *default_loop;	446	struct ev_loop *ev_default_loop_ptr;
258		447
259	#else	448	#else
260		449
261	ev_tstamp ev_rt_now;	450	ev_tstamp ev_rt_now;
262	#define VAR(name,decl) static decl;	451	#define VAR(name,decl) static decl;
263	#include "ev_vars.h"	452	#include "ev_vars.h"
264	#undef VAR	453	#undef VAR
265		454
266	static int default_loop;	455	static int ev_default_loop_ptr;
267		456
268	#endif	457	#endif
269		458
270	/*****************************************************************************/	459	/*****************************************************************************/
271		460
…		…
281	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
282	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
283	#endif	472	#endif
284	}	473	}
285		474
286	inline ev_tstamp	475	ev_tstamp inline_size
287	get_clock (void)	476	get_clock (void)
288	{	477	{
289	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
290	if (expect_true (have_monotonic))	479	if (expect_true (have_monotonic))
291	{	480	{
…		…
304	{	493	{
305	return ev_rt_now;	494	return ev_rt_now;
306	}	495	}
307	#endif	496	#endif
308		497
309	#define array_roundsize(type,n) ((n) | 4 & ~3)	498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
		502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
		522
		523	/*****************************************************************************/
		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		526
		527	int inline_size
		528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
		531
		532	do
		533	ncur <<= 1;
		534	while (cnt > ncur);
		535
		536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		538	{
		539	ncur *= elem;
		540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		541	ncur = ncur - sizeof (void *) * 4;
		542	ncur /= elem;
		543	}
		544
		545	return ncur;
		546	}
		547
		548	static noinline void *
		549	array_realloc (int elem, void *base, int *cur, int cnt)
		550	{
		551	*cur = array_nextsize (elem, *cur, cnt);
		552	return ev_realloc (base, elem * *cur);
		553	}
310		554
311	#define array_needsize(type,base,cur,cnt,init) \	555	#define array_needsize(type,base,cur,cnt,init) \
312	if (expect_false ((cnt) > cur)) \	556	if (expect_false ((cnt) > (cur))) \
313	{ \	557	{ \
314	int newcnt = cur; \	558	int ocur_ = (cur); \
315	do \	559	(base) = (type *)array_realloc \
316	{ \	560	(sizeof (type), (base), &(cur), (cnt)); \
317	newcnt = array_roundsize (type, newcnt << 1); \	561	init ((base) + (ocur_), (cur) - ocur_); \
318	} \
319	while ((cnt) > newcnt); \
320	\
321	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
322	init (base + cur, newcnt - cur); \
323	cur = newcnt; \
324	}	562	}
325		563
		564	#if 0
326	#define array_slim(type,stem) \	565	#define array_slim(type,stem) \
327	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
328	{ \	567	{ \
329	stem ## max = array_roundsize (stem ## cnt >> 1); \	568	stem ## max = array_roundsize (stem ## cnt >> 1); \
330	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	569	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
331	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
332	}	571	}
		572	#endif
333		573
334	#define array_free(stem, idx) \	574	#define array_free(stem, idx) \
335	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
336		576
337	/*****************************************************************************/	577	/*****************************************************************************/
338		578
339	static void	579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
		588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
		595
		596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
		598	{
		599	int i;
		600
		601	for (i = 0; i < eventcnt; ++i)
		602	ev_feed_event (EV_A_ events [i], type);
		603	}
		604
		605	/*****************************************************************************/
		606
		607	void inline_size
340	anfds_init (ANFD *base, int count)	608	anfds_init (ANFD *base, int count)
341	{	609	{
342	while (count--)	610	while (count--)
343	{	611	{
344	base->head = 0;	612	base->head = 0;
…		…
347		615
348	++base;	616	++base;
349	}	617	}
350	}	618	}
351		619
352	void	620	void inline_speed
353	ev_feed_event (EV_P_ void *w, int revents)
354	{
355	W w_ = (W)w;
356
357	if (w_->pending)
358	{
359	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
360	return;
361	}
362
363	w_->pending = ++pendingcnt [ABSPRI (w_)];
364	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
365	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
366	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
367	}
368
369	static void
370	queue_events (EV_P_ W *events, int eventcnt, int type)
371	{
372	int i;
373
374	for (i = 0; i < eventcnt; ++i)
375	ev_feed_event (EV_A_ events [i], type);
376	}
377
378	inline void
379	fd_event (EV_P_ int fd, int revents)	621	fd_event (EV_P_ int fd, int revents)
380	{	622	{
381	ANFD *anfd = anfds + fd;	623	ANFD *anfd = anfds + fd;
382	struct ev_io *w;	624	ev_io *w;
383		625
384	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
385	{	627	{
386	int ev = w->events & revents;	628	int ev = w->events & revents;
387		629
388	if (ev)	630	if (ev)
389	ev_feed_event (EV_A_ (W)w, ev);	631	ev_feed_event (EV_A_ (W)w, ev);
…		…
391	}	633	}
392		634
393	void	635	void
394	ev_feed_fd_event (EV_P_ int fd, int revents)	636	ev_feed_fd_event (EV_P_ int fd, int revents)
395	{	637	{
		638	if (fd >= 0 && fd < anfdmax)
396	fd_event (EV_A_ fd, revents);	639	fd_event (EV_A_ fd, revents);
397	}	640	}
398		641
399	/*****************************************************************************/	642	void inline_size
400
401	static void
402	fd_reify (EV_P)	643	fd_reify (EV_P)
403	{	644	{
404	int i;	645	int i;
405		646
406	for (i = 0; i < fdchangecnt; ++i)	647	for (i = 0; i < fdchangecnt; ++i)
407	{	648	{
408	int fd = fdchanges [i];	649	int fd = fdchanges [i];
409	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
410	struct ev_io *w;	651	ev_io *w;
411		652
412	int events = 0;	653	unsigned char events = 0;
413		654
414	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
415	events |= w->events;	656	events |= (unsigned char)w->events;
416		657
417	#if EV_SELECT_IS_WINSOCKET	658	#if EV_SELECT_IS_WINSOCKET
418	if (events)	659	if (events)
419	{	660	{
420	unsigned long argp;	661	unsigned long argp;
		662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
421	anfd->handle = _get_osfhandle (fd);	665	anfd->handle = _get_osfhandle (fd);
		666	#endif
422	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
423	}	668	}
424	#endif	669	#endif
425		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
426	anfd->reify = 0;	675	anfd->reify = 0;
427
428	method_modify (EV_A_ fd, anfd->events, events);
429	anfd->events = events;	676	anfd->events = events;
		677
		678	if (o_events != events || o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
		680	}
430	}	681	}
431		682
432	fdchangecnt = 0;	683	fdchangecnt = 0;
433	}	684	}
434		685
435	static void	686	void inline_size
436	fd_change (EV_P_ int fd)	687	fd_change (EV_P_ int fd, int flags)
437	{	688	{
438	if (anfds [fd].reify)	689	unsigned char reify = anfds [fd].reify;
439	return;
440
441	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
442		691
		692	if (expect_true (!reify))
		693	{
443	++fdchangecnt;	694	++fdchangecnt;
444	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
445	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
446	}	698	}
447		699
448	static void	700	void inline_speed
449	fd_kill (EV_P_ int fd)	701	fd_kill (EV_P_ int fd)
450	{	702	{
451	struct ev_io *w;	703	ev_io *w;
452		704
453	while ((w = (struct ev_io *)anfds [fd].head))	705	while ((w = (ev_io *)anfds [fd].head))
454	{	706	{
455	ev_io_stop (EV_A_ w);	707	ev_io_stop (EV_A_ w);
456	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
457	}	709	}
458	}	710	}
459		711
460	static int	712	int inline_size
461	fd_valid (int fd)	713	fd_valid (int fd)
462	{	714	{
463	#ifdef _WIN32	715	#ifdef _WIN32
464	return _get_osfhandle (fd) != -1;	716	return _get_osfhandle (fd) != -1;
465	#else	717	#else
466	return fcntl (fd, F_GETFD) != -1;	718	return fcntl (fd, F_GETFD) != -1;
467	#endif	719	#endif
468	}	720	}
469		721
470	/* called on EBADF to verify fds */	722	/* called on EBADF to verify fds */
471	static void	723	static void noinline
472	fd_ebadf (EV_P)	724	fd_ebadf (EV_P)
473	{	725	{
474	int fd;	726	int fd;
475		727
476	for (fd = 0; fd < anfdmax; ++fd)	728	for (fd = 0; fd < anfdmax; ++fd)
…		…
478	if (!fd_valid (fd) == -1 && errno == EBADF)	730	if (!fd_valid (fd) == -1 && errno == EBADF)
479	fd_kill (EV_A_ fd);	731	fd_kill (EV_A_ fd);
480	}	732	}
481		733
482	/* called on ENOMEM in select/poll to kill some fds and retry */	734	/* called on ENOMEM in select/poll to kill some fds and retry */
483	static void	735	static void noinline
484	fd_enomem (EV_P)	736	fd_enomem (EV_P)
485	{	737	{
486	int fd;	738	int fd;
487		739
488	for (fd = anfdmax; fd--; )	740	for (fd = anfdmax; fd--; )
…		…
491	fd_kill (EV_A_ fd);	743	fd_kill (EV_A_ fd);
492	return;	744	return;
493	}	745	}
494	}	746	}
495		747
496	/* usually called after fork if method needs to re-arm all fds from scratch */	748	/* usually called after fork if backend needs to re-arm all fds from scratch */
497	static void	749	static void noinline
498	fd_rearm_all (EV_P)	750	fd_rearm_all (EV_P)
499	{	751	{
500	int fd;	752	int fd;
501		753
502	/* this should be highly optimised to not do anything but set a flag */
503	for (fd = 0; fd < anfdmax; ++fd)	754	for (fd = 0; fd < anfdmax; ++fd)
504	if (anfds [fd].events)	755	if (anfds [fd].events)
505	{	756	{
506	anfds [fd].events = 0;	757	anfds [fd].events = 0;
507	fd_change (EV_A_ fd);	758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
508	}	759	}
509	}	760	}
510		761
511	/*****************************************************************************/	762	/*****************************************************************************/
512		763
513	static void	764	/*
		765	* at the moment we allow libev the luxury of two heaps,
		766	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		767	* which is more cache-efficient.
		768	* the difference is about 5% with 50000+ watchers.
		769	*/
		770	#define USE_4HEAP !EV_MINIMAL
		771	#if USE_4HEAP
		772
		773	#define HEAP0 3 /* index of first element in heap */
		774
		775	/* towards the root */
		776	void inline_speed
514	upheap (WT *heap, int k)	777	upheap (WT *heap, int k)
515	{	778	{
516	WT w = heap [k];	779	WT w = heap [k];
517		780
518	while (k && heap [k >> 1]->at > w->at)	781	for (;;)
519	{	782	{
		783	int p = ((k - HEAP0 - 1) / 4) + HEAP0;
		784
		785	if (p >= HEAP0 || heap [p]->at <= w->at)
		786	break;
		787
520	heap [k] = heap [k >> 1];	788	heap [k] = heap [p];
521	((W)heap [k])->active = k + 1;	789	ev_active (heap [k]) = k;
522	k >>= 1;	790	k = p;
523	}	791	}
524		792
525	heap [k] = w;	793	heap [k] = w;
526	((W)heap [k])->active = k + 1;	794	ev_active (heap [k]) = k;
527
528	}	795	}
529		796
530	static void	797	/* away from the root */
		798	void inline_speed
531	downheap (WT *heap, int N, int k)	799	downheap (WT *heap, int N, int k)
532	{	800	{
533	WT w = heap [k];	801	WT w = heap [k];
		802	WT *E = heap + N + HEAP0;
534		803
535	while (k < (N >> 1))	804	for (;;)
536	{	805	{
537	int j = k << 1;	806	ev_tstamp minat;
		807	WT *minpos;
		808	WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
538		809
539	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	810	// find minimum child
		811	if (expect_true (pos +3 < E))
540	++j;	812	{
		813	/* fast path */
		814	(minpos = pos + 0), (minat = (*minpos)->at);
		815	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		816	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		817	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		818	}
		819	else
		820	{
		821	/* slow path */
		822	if (pos >= E)
		823	break;
		824	(minpos = pos + 0), (minat = (*minpos)->at);
		825	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		826	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		827	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		828	}
541		829
542	if (w->at <= heap [j]->at)	830	if (w->at <= minat)
543	break;	831	break;
544		832
545	heap [k] = heap [j];	833	ev_active (*minpos) = k;
546	((W)heap [k])->active = k + 1;	834	heap [k] = *minpos;
547	k = j;	835
		836	k = minpos - heap;
548	}	837	}
549		838
550	heap [k] = w;	839	heap [k] = w;
		840	ev_active (heap [k]) = k;
		841	}
		842
		843	#else // 4HEAP
		844
		845	#define HEAP0 1
		846
		847	/* towards the root */
		848	void inline_speed
		849	upheap (WT *heap, int k)
		850	{
		851	WT w = heap [k];
		852
		853	for (;;)
		854	{
		855	int p = k >> 1;
		856
		857	/* maybe we could use a dummy element at heap [0]? */
		858	if (!p || heap [p]->at <= w->at)
		859	break;
		860
		861	heap [k] = heap [p];
		862	ev_active (heap [k]) = k;
		863	k = p;
		864	}
		865
		866	heap [k] = w;
		867	ev_active (heap [k]) = k;
		868	}
		869
		870	/* away from the root */
		871	void inline_speed
		872	downheap (WT *heap, int N, int k)
		873	{
		874	WT w = heap [k];
		875
		876	for (;;)
		877	{
		878	int c = k << 1;
		879
		880	if (c > N)
		881	break;
		882
		883	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		884	? 1 : 0;
		885
		886	if (w->at <= heap [c]->at)
		887	break;
		888
		889	heap [k] = heap [c];
551	((W)heap [k])->active = k + 1;	890	((W)heap [k])->active = k;
552	}	891
		892	k = c;
		893	}
553		894
554	inline void	895	heap [k] = w;
		896	ev_active (heap [k]) = k;
		897	}
		898	#endif
		899
		900	void inline_size
555	adjustheap (WT *heap, int N, int k)	901	adjustheap (WT *heap, int N, int k)
556	{	902	{
557	upheap (heap, k);	903	upheap (heap, k);
558	downheap (heap, N, k);	904	downheap (heap, N, k);
559	}	905	}
…		…
561	/*****************************************************************************/	907	/*****************************************************************************/
562		908
563	typedef struct	909	typedef struct
564	{	910	{
565	WL head;	911	WL head;
566	sig_atomic_t volatile gotsig;	912	EV_ATOMIC_T gotsig;
567	} ANSIG;	913	} ANSIG;
568		914
569	static ANSIG *signals;	915	static ANSIG *signals;
570	static int signalmax;	916	static int signalmax;
571		917
572	static int sigpipe [2];	918	static EV_ATOMIC_T gotsig;
573	static sig_atomic_t volatile gotsig;
574	static struct ev_io sigev;
575		919
576	static void	920	void inline_size
577	signals_init (ANSIG *base, int count)	921	signals_init (ANSIG *base, int count)
578	{	922	{
579	while (count--)	923	while (count--)
580	{	924	{
581	base->head = 0;	925	base->head = 0;
…		…
583		927
584	++base;	928	++base;
585	}	929	}
586	}	930	}
587		931
588	static void	932	/*****************************************************************************/
589	sighandler (int signum)
590	{
591	#if _WIN32
592	signal (signum, sighandler);
593	#endif
594		933
595	signals [signum - 1].gotsig = 1;	934	void inline_speed
596
597	if (!gotsig)
598	{
599	int old_errno = errno;
600	gotsig = 1;
601	write (sigpipe [1], &signum, 1);
602	errno = old_errno;
603	}
604	}
605
606	void
607	ev_feed_signal_event (EV_P_ int signum)
608	{
609	WL w;
610
611	#if EV_MULTIPLICITY
612	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
613	#endif
614
615	--signum;
616
617	if (signum < 0 || signum >= signalmax)
618	return;
619
620	signals [signum].gotsig = 0;
621
622	for (w = signals [signum].head; w; w = w->next)
623	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
624	}
625
626	static void
627	sigcb (EV_P_ struct ev_io *iow, int revents)
628	{
629	int signum;
630
631	read (sigpipe [0], &revents, 1);
632	gotsig = 0;
633
634	for (signum = signalmax; signum--; )
635	if (signals [signum].gotsig)
636	ev_feed_signal_event (EV_A_ signum + 1);
637	}
638
639	inline void
640	fd_intern (int fd)	935	fd_intern (int fd)
641	{	936	{
642	#ifdef _WIN32	937	#ifdef _WIN32
643	int arg = 1;	938	int arg = 1;
644	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	939	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
646	fcntl (fd, F_SETFD, FD_CLOEXEC);	941	fcntl (fd, F_SETFD, FD_CLOEXEC);
647	fcntl (fd, F_SETFL, O_NONBLOCK);	942	fcntl (fd, F_SETFL, O_NONBLOCK);
648	#endif	943	#endif
649	}	944	}
650		945
		946	static void noinline
		947	evpipe_init (EV_P)
		948	{
		949	if (!ev_is_active (&pipeev))
		950	{
		951	#if EV_USE_EVENTFD
		952	if ((evfd = eventfd (0, 0)) >= 0)
		953	{
		954	evpipe [0] = -1;
		955	fd_intern (evfd);
		956	ev_io_set (&pipeev, evfd, EV_READ);
		957	}
		958	else
		959	#endif
		960	{
		961	while (pipe (evpipe))
		962	syserr ("(libev) error creating signal/async pipe");
		963
		964	fd_intern (evpipe [0]);
		965	fd_intern (evpipe [1]);
		966	ev_io_set (&pipeev, evpipe [0], EV_READ);
		967	}
		968
		969	ev_io_start (EV_A_ &pipeev);
		970	ev_unref (EV_A); /* watcher should not keep loop alive */
		971	}
		972	}
		973
		974	void inline_size
		975	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		976	{
		977	if (!*flag)
		978	{
		979	int old_errno = errno; /* save errno because write might clobber it */
		980
		981	*flag = 1;
		982
		983	#if EV_USE_EVENTFD
		984	if (evfd >= 0)
		985	{
		986	uint64_t counter = 1;
		987	write (evfd, &counter, sizeof (uint64_t));
		988	}
		989	else
		990	#endif
		991	write (evpipe [1], &old_errno, 1);
		992
		993	errno = old_errno;
		994	}
		995	}
		996
651	static void	997	static void
652	siginit (EV_P)	998	pipecb (EV_P_ ev_io *iow, int revents)
653	{	999	{
654	fd_intern (sigpipe [0]);	1000	#if EV_USE_EVENTFD
655	fd_intern (sigpipe [1]);	1001	if (evfd >= 0)
		1002	{
		1003	uint64_t counter;
		1004	read (evfd, &counter, sizeof (uint64_t));
		1005	}
		1006	else
		1007	#endif
		1008	{
		1009	char dummy;
		1010	read (evpipe [0], &dummy, 1);
		1011	}
656		1012
657	ev_io_set (&sigev, sigpipe [0], EV_READ);	1013	if (gotsig && ev_is_default_loop (EV_A))
658	ev_io_start (EV_A_ &sigev);	1014	{
659	ev_unref (EV_A); /* child watcher should not keep loop alive */	1015	int signum;
		1016	gotsig = 0;
		1017
		1018	for (signum = signalmax; signum--; )
		1019	if (signals [signum].gotsig)
		1020	ev_feed_signal_event (EV_A_ signum + 1);
		1021	}
		1022
		1023	#if EV_ASYNC_ENABLE
		1024	if (gotasync)
		1025	{
		1026	int i;
		1027	gotasync = 0;
		1028
		1029	for (i = asynccnt; i--; )
		1030	if (asyncs [i]->sent)
		1031	{
		1032	asyncs [i]->sent = 0;
		1033	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1034	}
		1035	}
		1036	#endif
660	}	1037	}
661		1038
662	/*****************************************************************************/	1039	/*****************************************************************************/
663		1040
664	static struct ev_child *childs [PID_HASHSIZE];	1041	static void
		1042	ev_sighandler (int signum)
		1043	{
		1044	#if EV_MULTIPLICITY
		1045	struct ev_loop *loop = &default_loop_struct;
		1046	#endif
		1047
		1048	#if _WIN32
		1049	signal (signum, ev_sighandler);
		1050	#endif
		1051
		1052	signals [signum - 1].gotsig = 1;
		1053	evpipe_write (EV_A_ &gotsig);
		1054	}
		1055
		1056	void noinline
		1057	ev_feed_signal_event (EV_P_ int signum)
		1058	{
		1059	WL w;
		1060
		1061	#if EV_MULTIPLICITY
		1062	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1063	#endif
		1064
		1065	--signum;
		1066
		1067	if (signum < 0 || signum >= signalmax)
		1068	return;
		1069
		1070	signals [signum].gotsig = 0;
		1071
		1072	for (w = signals [signum].head; w; w = w->next)
		1073	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1074	}
		1075
		1076	/*****************************************************************************/
		1077
		1078	static WL childs [EV_PID_HASHSIZE];
665		1079
666	#ifndef _WIN32	1080	#ifndef _WIN32
667		1081
668	static struct ev_signal childev;	1082	static ev_signal childev;
		1083
		1084	#ifndef WIFCONTINUED
		1085	# define WIFCONTINUED(status) 0
		1086	#endif
		1087
		1088	void inline_speed
		1089	child_reap (EV_P_ int chain, int pid, int status)
		1090	{
		1091	ev_child *w;
		1092	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1093
		1094	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1095	{
		1096	if ((w->pid == pid || !w->pid)
		1097	&& (!traced || (w->flags & 1)))
		1098	{
		1099	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1100	w->rpid = pid;
		1101	w->rstatus = status;
		1102	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1103	}
		1104	}
		1105	}
669		1106
670	#ifndef WCONTINUED	1107	#ifndef WCONTINUED
671	# define WCONTINUED 0	1108	# define WCONTINUED 0
672	#endif	1109	#endif
673		1110
674	static void	1111	static void
675	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
676	{
677	struct ev_child *w;
678
679	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
680	if (w->pid == pid || !w->pid)
681	{
682	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
683	w->rpid = pid;
684	w->rstatus = status;
685	ev_feed_event (EV_A_ (W)w, EV_CHILD);
686	}
687	}
688
689	static void
690	childcb (EV_P_ struct ev_signal *sw, int revents)	1112	childcb (EV_P_ ev_signal *sw, int revents)
691	{	1113	{
692	int pid, status;	1114	int pid, status;
693		1115
		1116	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
694	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1117	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
695	{	1118	if (!WCONTINUED
		1119	|| errno != EINVAL
		1120	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1121	return;
		1122
696	/* make sure we are called again until all childs have been reaped */	1123	/* make sure we are called again until all children have been reaped */
		1124	/* we need to do it this way so that the callback gets called before we continue */
697	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1125	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
698		1126
699	child_reap (EV_A_ sw, pid, pid, status);	1127	child_reap (EV_A_ pid, pid, status);
		1128	if (EV_PID_HASHSIZE > 1)
700	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1129	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
701	}
702	}	1130	}
703		1131
704	#endif	1132	#endif
705		1133
706	/*****************************************************************************/	1134	/*****************************************************************************/
707		1135
		1136	#if EV_USE_PORT
		1137	# include "ev_port.c"
		1138	#endif
708	#if EV_USE_KQUEUE	1139	#if EV_USE_KQUEUE
709	# include "ev_kqueue.c"	1140	# include "ev_kqueue.c"
710	#endif	1141	#endif
711	#if EV_USE_EPOLL	1142	#if EV_USE_EPOLL
712	# include "ev_epoll.c"	1143	# include "ev_epoll.c"
…		…
729	{	1160	{
730	return EV_VERSION_MINOR;	1161	return EV_VERSION_MINOR;
731	}	1162	}
732		1163
733	/* return true if we are running with elevated privileges and should ignore env variables */	1164	/* return true if we are running with elevated privileges and should ignore env variables */
734	static int	1165	int inline_size
735	enable_secure (void)	1166	enable_secure (void)
736	{	1167	{
737	#ifdef _WIN32	1168	#ifdef _WIN32
738	return 0;	1169	return 0;
739	#else	1170	#else
740	return getuid () != geteuid ()	1171	return getuid () != geteuid ()
741	|| getgid () != getegid ();	1172	|| getgid () != getegid ();
742	#endif	1173	#endif
743	}	1174	}
744		1175
745	int	1176	unsigned int
746	ev_method (EV_P)	1177	ev_supported_backends (void)
747	{	1178	{
748	return method;	1179	unsigned int flags = 0;
749	}
750		1180
751	static void	1181	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
752	loop_init (EV_P_ int methods)	1182	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1183	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1184	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1185	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1186
		1187	return flags;
		1188	}
		1189
		1190	unsigned int
		1191	ev_recommended_backends (void)
753	{	1192	{
754	if (!method)	1193	unsigned int flags = ev_supported_backends ();
		1194
		1195	#ifndef __NetBSD__
		1196	/* kqueue is borked on everything but netbsd apparently */
		1197	/* it usually doesn't work correctly on anything but sockets and pipes */
		1198	flags &= ~EVBACKEND_KQUEUE;
		1199	#endif
		1200	#ifdef __APPLE__
		1201	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1202	flags &= ~EVBACKEND_POLL;
		1203	#endif
		1204
		1205	return flags;
		1206	}
		1207
		1208	unsigned int
		1209	ev_embeddable_backends (void)
		1210	{
		1211	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1212
		1213	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1214	/* please fix it and tell me how to detect the fix */
		1215	flags &= ~EVBACKEND_EPOLL;
		1216
		1217	return flags;
		1218	}
		1219
		1220	unsigned int
		1221	ev_backend (EV_P)
		1222	{
		1223	return backend;
		1224	}
		1225
		1226	unsigned int
		1227	ev_loop_count (EV_P)
		1228	{
		1229	return loop_count;
		1230	}
		1231
		1232	void
		1233	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1234	{
		1235	io_blocktime = interval;
		1236	}
		1237
		1238	void
		1239	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1240	{
		1241	timeout_blocktime = interval;
		1242	}
		1243
		1244	static void noinline
		1245	loop_init (EV_P_ unsigned int flags)
		1246	{
		1247	if (!backend)
755	{	1248	{
756	#if EV_USE_MONOTONIC	1249	#if EV_USE_MONOTONIC
757	{	1250	{
758	struct timespec ts;	1251	struct timespec ts;
759	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1252	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
760	have_monotonic = 1;	1253	have_monotonic = 1;
761	}	1254	}
762	#endif	1255	#endif
763		1256
764	ev_rt_now = ev_time ();	1257	ev_rt_now = ev_time ();
765	mn_now = get_clock ();	1258	mn_now = get_clock ();
766	now_floor = mn_now;	1259	now_floor = mn_now;
767	rtmn_diff = ev_rt_now - mn_now;	1260	rtmn_diff = ev_rt_now - mn_now;
768		1261
769	if (methods == EVMETHOD_AUTO)	1262	io_blocktime = 0.;
770	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1263	timeout_blocktime = 0.;
		1264	backend = 0;
		1265	backend_fd = -1;
		1266	gotasync = 0;
		1267	#if EV_USE_INOTIFY
		1268	fs_fd = -2;
		1269	#endif
		1270
		1271	/* pid check not overridable via env */
		1272	#ifndef _WIN32
		1273	if (flags & EVFLAG_FORKCHECK)
		1274	curpid = getpid ();
		1275	#endif
		1276
		1277	if (!(flags & EVFLAG_NOENV)
		1278	&& !enable_secure ()
		1279	&& getenv ("LIBEV_FLAGS"))
771	methods = atoi (getenv ("LIBEV_METHODS"));	1280	flags = atoi (getenv ("LIBEV_FLAGS"));
772	else
773	methods = EVMETHOD_ANY;
774		1281
775	method = 0;	1282	if (!(flags & 0x0000ffffU))
		1283	flags |= ev_recommended_backends ();
		1284
		1285	#if EV_USE_PORT
		1286	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1287	#endif
776	#if EV_USE_KQUEUE	1288	#if EV_USE_KQUEUE
777	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1289	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
778	#endif	1290	#endif
779	#if EV_USE_EPOLL	1291	#if EV_USE_EPOLL
780	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1292	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
781	#endif	1293	#endif
782	#if EV_USE_POLL	1294	#if EV_USE_POLL
783	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1295	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
784	#endif	1296	#endif
785	#if EV_USE_SELECT	1297	#if EV_USE_SELECT
786	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1298	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
787	#endif	1299	#endif
788		1300
789	ev_init (&sigev, sigcb);	1301	ev_init (&pipeev, pipecb);
790	ev_set_priority (&sigev, EV_MAXPRI);	1302	ev_set_priority (&pipeev, EV_MAXPRI);
791	}	1303	}
792	}	1304	}
793		1305
794	void	1306	static void noinline
795	loop_destroy (EV_P)	1307	loop_destroy (EV_P)
796	{	1308	{
797	int i;	1309	int i;
798		1310
		1311	if (ev_is_active (&pipeev))
		1312	{
		1313	ev_ref (EV_A); /* signal watcher */
		1314	ev_io_stop (EV_A_ &pipeev);
		1315
		1316	#if EV_USE_EVENTFD
		1317	if (evfd >= 0)
		1318	close (evfd);
		1319	#endif
		1320
		1321	if (evpipe [0] >= 0)
		1322	{
		1323	close (evpipe [0]);
		1324	close (evpipe [1]);
		1325	}
		1326	}
		1327
		1328	#if EV_USE_INOTIFY
		1329	if (fs_fd >= 0)
		1330	close (fs_fd);
		1331	#endif
		1332
		1333	if (backend_fd >= 0)
		1334	close (backend_fd);
		1335
		1336	#if EV_USE_PORT
		1337	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1338	#endif
799	#if EV_USE_KQUEUE	1339	#if EV_USE_KQUEUE
800	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1340	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
801	#endif	1341	#endif
802	#if EV_USE_EPOLL	1342	#if EV_USE_EPOLL
803	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1343	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
804	#endif	1344	#endif
805	#if EV_USE_POLL	1345	#if EV_USE_POLL
806	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1346	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
807	#endif	1347	#endif
808	#if EV_USE_SELECT	1348	#if EV_USE_SELECT
809	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1349	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
810	#endif	1350	#endif
811		1351
812	for (i = NUMPRI; i--; )	1352	for (i = NUMPRI; i--; )
		1353	{
813	array_free (pending, [i]);	1354	array_free (pending, [i]);
		1355	#if EV_IDLE_ENABLE
		1356	array_free (idle, [i]);
		1357	#endif
		1358	}
		1359
		1360	ev_free (anfds); anfdmax = 0;
814		1361
815	/* have to use the microsoft-never-gets-it-right macro */	1362	/* have to use the microsoft-never-gets-it-right macro */
816	array_free (fdchange, EMPTY);	1363	array_free (fdchange, EMPTY);
817	array_free (timer, EMPTY);	1364	array_free (timer, EMPTY);
818	#if EV_PERIODICS	1365	#if EV_PERIODIC_ENABLE
819	array_free (periodic, EMPTY);	1366	array_free (periodic, EMPTY);
820	#endif	1367	#endif
		1368	#if EV_FORK_ENABLE
821	array_free (idle, EMPTY);	1369	array_free (fork, EMPTY);
		1370	#endif
822	array_free (prepare, EMPTY);	1371	array_free (prepare, EMPTY);
823	array_free (check, EMPTY);	1372	array_free (check, EMPTY);
		1373	#if EV_ASYNC_ENABLE
		1374	array_free (async, EMPTY);
		1375	#endif
824		1376
825	method = 0;	1377	backend = 0;
826	}	1378	}
827		1379
828	static void	1380	#if EV_USE_INOTIFY
		1381	void inline_size infy_fork (EV_P);
		1382	#endif
		1383
		1384	void inline_size
829	loop_fork (EV_P)	1385	loop_fork (EV_P)
830	{	1386	{
		1387	#if EV_USE_PORT
		1388	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1389	#endif
		1390	#if EV_USE_KQUEUE
		1391	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1392	#endif
831	#if EV_USE_EPOLL	1393	#if EV_USE_EPOLL
832	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1394	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
833	#endif	1395	#endif
834	#if EV_USE_KQUEUE	1396	#if EV_USE_INOTIFY
835	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1397	infy_fork (EV_A);
836	#endif	1398	#endif
837		1399
838	if (ev_is_active (&sigev))	1400	if (ev_is_active (&pipeev))
839	{	1401	{
840	/* default loop */	1402	/* this "locks" the handlers against writing to the pipe */
		1403	/* while we modify the fd vars */
		1404	gotsig = 1;
		1405	#if EV_ASYNC_ENABLE
		1406	gotasync = 1;
		1407	#endif
841		1408
842	ev_ref (EV_A);	1409	ev_ref (EV_A);
843	ev_io_stop (EV_A_ &sigev);	1410	ev_io_stop (EV_A_ &pipeev);
		1411
		1412	#if EV_USE_EVENTFD
		1413	if (evfd >= 0)
		1414	close (evfd);
		1415	#endif
		1416
		1417	if (evpipe [0] >= 0)
		1418	{
844	close (sigpipe [0]);	1419	close (evpipe [0]);
845	close (sigpipe [1]);	1420	close (evpipe [1]);
		1421	}
846		1422
847	while (pipe (sigpipe))
848	syserr ("(libev) error creating pipe");
849
850	siginit (EV_A);	1423	evpipe_init (EV_A);
		1424	/* now iterate over everything, in case we missed something */
		1425	pipecb (EV_A_ &pipeev, EV_READ);
851	}	1426	}
852		1427
853	postfork = 0;	1428	postfork = 0;
854	}	1429	}
855		1430
856	#if EV_MULTIPLICITY	1431	#if EV_MULTIPLICITY
857	struct ev_loop *	1432	struct ev_loop *
858	ev_loop_new (int methods)	1433	ev_loop_new (unsigned int flags)
859	{	1434	{
860	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1435	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
861		1436
862	memset (loop, 0, sizeof (struct ev_loop));	1437	memset (loop, 0, sizeof (struct ev_loop));
863		1438
864	loop_init (EV_A_ methods);	1439	loop_init (EV_A_ flags);
865		1440
866	if (ev_method (EV_A))	1441	if (ev_backend (EV_A))
867	return loop;	1442	return loop;
868		1443
869	return 0;	1444	return 0;
870	}	1445	}
871		1446
…		…
877	}	1452	}
878		1453
879	void	1454	void
880	ev_loop_fork (EV_P)	1455	ev_loop_fork (EV_P)
881	{	1456	{
882	postfork = 1;	1457	postfork = 1; /* must be in line with ev_default_fork */
883	}	1458	}
884
885	#endif	1459	#endif
886		1460
887	#if EV_MULTIPLICITY	1461	#if EV_MULTIPLICITY
888	struct ev_loop *	1462	struct ev_loop *
		1463	ev_default_loop_init (unsigned int flags)
889	#else	1464	#else
890	int	1465	int
		1466	ev_default_loop (unsigned int flags)
891	#endif	1467	#endif
892	ev_default_loop (int methods)
893	{	1468	{
894	if (sigpipe [0] == sigpipe [1])
895	if (pipe (sigpipe))
896	return 0;
897
898	if (!default_loop)	1469	if (!ev_default_loop_ptr)
899	{	1470	{
900	#if EV_MULTIPLICITY	1471	#if EV_MULTIPLICITY
901	struct ev_loop *loop = default_loop = &default_loop_struct;	1472	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
902	#else	1473	#else
903	default_loop = 1;	1474	ev_default_loop_ptr = 1;
904	#endif	1475	#endif
905		1476
906	loop_init (EV_A_ methods);	1477	loop_init (EV_A_ flags);
907		1478
908	if (ev_method (EV_A))	1479	if (ev_backend (EV_A))
909	{	1480	{
910	siginit (EV_A);
911
912	#ifndef _WIN32	1481	#ifndef _WIN32
913	ev_signal_init (&childev, childcb, SIGCHLD);	1482	ev_signal_init (&childev, childcb, SIGCHLD);
914	ev_set_priority (&childev, EV_MAXPRI);	1483	ev_set_priority (&childev, EV_MAXPRI);
915	ev_signal_start (EV_A_ &childev);	1484	ev_signal_start (EV_A_ &childev);
916	ev_unref (EV_A); /* child watcher should not keep loop alive */	1485	ev_unref (EV_A); /* child watcher should not keep loop alive */
917	#endif	1486	#endif
918	}	1487	}
919	else	1488	else
920	default_loop = 0;	1489	ev_default_loop_ptr = 0;
921	}	1490	}
922		1491
923	return default_loop;	1492	return ev_default_loop_ptr;
924	}	1493	}
925		1494
926	void	1495	void
927	ev_default_destroy (void)	1496	ev_default_destroy (void)
928	{	1497	{
929	#if EV_MULTIPLICITY	1498	#if EV_MULTIPLICITY
930	struct ev_loop *loop = default_loop;	1499	struct ev_loop *loop = ev_default_loop_ptr;
931	#endif	1500	#endif
932		1501
933	#ifndef _WIN32	1502	#ifndef _WIN32
934	ev_ref (EV_A); /* child watcher */	1503	ev_ref (EV_A); /* child watcher */
935	ev_signal_stop (EV_A_ &childev);	1504	ev_signal_stop (EV_A_ &childev);
936	#endif	1505	#endif
937		1506
938	ev_ref (EV_A); /* signal watcher */
939	ev_io_stop (EV_A_ &sigev);
940
941	close (sigpipe [0]); sigpipe [0] = 0;
942	close (sigpipe [1]); sigpipe [1] = 0;
943
944	loop_destroy (EV_A);	1507	loop_destroy (EV_A);
945	}	1508	}
946		1509
947	void	1510	void
948	ev_default_fork (void)	1511	ev_default_fork (void)
949	{	1512	{
950	#if EV_MULTIPLICITY	1513	#if EV_MULTIPLICITY
951	struct ev_loop *loop = default_loop;	1514	struct ev_loop *loop = ev_default_loop_ptr;
952	#endif	1515	#endif
953		1516
954	if (method)	1517	if (backend)
955	postfork = 1;	1518	postfork = 1; /* must be in line with ev_loop_fork */
956	}	1519	}
957		1520
958	/*****************************************************************************/	1521	/*****************************************************************************/
959		1522
960	static int	1523	void
961	any_pending (EV_P)	1524	ev_invoke (EV_P_ void *w, int revents)
962	{	1525	{
963	int pri;	1526	EV_CB_INVOKE ((W)w, revents);
964
965	for (pri = NUMPRI; pri--; )
966	if (pendingcnt [pri])
967	return 1;
968
969	return 0;
970	}	1527	}
971		1528
972	static void	1529	void inline_speed
973	call_pending (EV_P)	1530	call_pending (EV_P)
974	{	1531	{
975	int pri;	1532	int pri;
976		1533
977	for (pri = NUMPRI; pri--; )	1534	for (pri = NUMPRI; pri--; )
978	while (pendingcnt [pri])	1535	while (pendingcnt [pri])
979	{	1536	{
980	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1537	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
981		1538
982	if (p->w)	1539	if (expect_true (p->w))
983	{	1540	{
		1541	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1542
984	p->w->pending = 0;	1543	p->w->pending = 0;
985	EV_CB_INVOKE (p->w, p->events);	1544	EV_CB_INVOKE (p->w, p->events);
986	}	1545	}
987	}	1546	}
988	}	1547	}
989		1548
990	static void	1549	#if EV_IDLE_ENABLE
		1550	void inline_size
		1551	idle_reify (EV_P)
		1552	{
		1553	if (expect_false (idleall))
		1554	{
		1555	int pri;
		1556
		1557	for (pri = NUMPRI; pri--; )
		1558	{
		1559	if (pendingcnt [pri])
		1560	break;
		1561
		1562	if (idlecnt [pri])
		1563	{
		1564	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1565	break;
		1566	}
		1567	}
		1568	}
		1569	}
		1570	#endif
		1571
		1572	void inline_size
991	timers_reify (EV_P)	1573	timers_reify (EV_P)
992	{	1574	{
993	while (timercnt && ((WT)timers [0])->at <= mn_now)	1575	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
994	{	1576	{
995	struct ev_timer *w = timers [0];	1577	ev_timer *w = (ev_timer *)timers [HEAP0];
996		1578
997	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1579	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
998		1580
999	/* first reschedule or stop timer */	1581	/* first reschedule or stop timer */
1000	if (w->repeat)	1582	if (w->repeat)
1001	{	1583	{
1002	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1584	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1003		1585
1004	((WT)w)->at += w->repeat;	1586	ev_at (w) += w->repeat;
1005	if (((WT)w)->at < mn_now)	1587	if (ev_at (w) < mn_now)
1006	((WT)w)->at = mn_now;	1588	ev_at (w) = mn_now;
1007		1589
1008	downheap ((WT *)timers, timercnt, 0);	1590	downheap (timers, timercnt, HEAP0);
1009	}	1591	}
1010	else	1592	else
1011	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1593	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1012		1594
1013	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1595	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1014	}	1596	}
1015	}	1597	}
1016		1598
1017	#if EV_PERIODICS	1599	#if EV_PERIODIC_ENABLE
1018	static void	1600	void inline_size
1019	periodics_reify (EV_P)	1601	periodics_reify (EV_P)
1020	{	1602	{
1021	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1603	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
1022	{	1604	{
1023	struct ev_periodic *w = periodics [0];	1605	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1024		1606
1025	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1607	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1026		1608
1027	/* first reschedule or stop timer */	1609	/* first reschedule or stop timer */
1028	if (w->reschedule_cb)	1610	if (w->reschedule_cb)
1029	{	1611	{
1030	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1612	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1031
1032	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1613	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1033	downheap ((WT *)periodics, periodiccnt, 0);	1614	downheap (periodics, periodiccnt, 1);
1034	}	1615	}
1035	else if (w->interval)	1616	else if (w->interval)
1036	{	1617	{
1037	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1618	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1619	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1038	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1620	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1039	downheap ((WT *)periodics, periodiccnt, 0);	1621	downheap (periodics, periodiccnt, HEAP0);
1040	}	1622	}
1041	else	1623	else
1042	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1624	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1043		1625
1044	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1626	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1045	}	1627	}
1046	}	1628	}
1047		1629
1048	static void	1630	static void noinline
1049	periodics_reschedule (EV_P)	1631	periodics_reschedule (EV_P)
1050	{	1632	{
1051	int i;	1633	int i;
1052		1634
1053	/* adjust periodics after time jump */	1635	/* adjust periodics after time jump */
1054	for (i = 0; i < periodiccnt; ++i)	1636	for (i = 1; i <= periodiccnt; ++i)
1055	{	1637	{
1056	struct ev_periodic *w = periodics [i];	1638	ev_periodic *w = (ev_periodic *)periodics [i];
1057		1639
1058	if (w->reschedule_cb)	1640	if (w->reschedule_cb)
1059	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1641	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1060	else if (w->interval)	1642	else if (w->interval)
1061	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1643	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1062	}	1644	}
1063		1645
1064	/* now rebuild the heap */	1646	/* now rebuild the heap */
1065	for (i = periodiccnt >> 1; i--; )	1647	for (i = periodiccnt >> 1; --i; )
1066	downheap ((WT *)periodics, periodiccnt, i);	1648	downheap (periodics, periodiccnt, i + HEAP0);
1067	}	1649	}
1068	#endif	1650	#endif
1069		1651
1070	inline int	1652	void inline_speed
1071	time_update_monotonic (EV_P)	1653	time_update (EV_P_ ev_tstamp max_block)
1072	{	1654	{
		1655	int i;
		1656
		1657	#if EV_USE_MONOTONIC
		1658	if (expect_true (have_monotonic))
		1659	{
		1660	ev_tstamp odiff = rtmn_diff;
		1661
1073	mn_now = get_clock ();	1662	mn_now = get_clock ();
1074		1663
		1664	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1665	/* interpolate in the meantime */
1075	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1666	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1076	{	1667	{
1077	ev_rt_now = rtmn_diff + mn_now;	1668	ev_rt_now = rtmn_diff + mn_now;
1078	return 0;	1669	return;
1079	}	1670	}
1080	else	1671
1081	{
1082	now_floor = mn_now;	1672	now_floor = mn_now;
1083	ev_rt_now = ev_time ();	1673	ev_rt_now = ev_time ();
1084	return 1;
1085	}
1086	}
1087		1674
1088	static void	1675	/* loop a few times, before making important decisions.
1089	time_update (EV_P)	1676	* on the choice of "4": one iteration isn't enough,
1090	{	1677	* in case we get preempted during the calls to
1091	int i;	1678	* ev_time and get_clock. a second call is almost guaranteed
1092		1679	* to succeed in that case, though. and looping a few more times
1093	#if EV_USE_MONOTONIC	1680	* doesn't hurt either as we only do this on time-jumps or
1094	if (expect_true (have_monotonic))	1681	* in the unlikely event of having been preempted here.
1095	{	1682	*/
1096	if (time_update_monotonic (EV_A))	1683	for (i = 4; --i; )
1097	{	1684	{
1098	ev_tstamp odiff = rtmn_diff;
1099
1100	for (i = 4; --i; ) /* loop a few times, before making important decisions */
1101	{
1102	rtmn_diff = ev_rt_now - mn_now;	1685	rtmn_diff = ev_rt_now - mn_now;
1103		1686
1104	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1687	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1105	return; /* all is well */	1688	return; /* all is well */
1106		1689
1107	ev_rt_now = ev_time ();	1690	ev_rt_now = ev_time ();
1108	mn_now = get_clock ();	1691	mn_now = get_clock ();
1109	now_floor = mn_now;	1692	now_floor = mn_now;
1110	}	1693	}
1111		1694
1112	# if EV_PERIODICS	1695	# if EV_PERIODIC_ENABLE
		1696	periodics_reschedule (EV_A);
		1697	# endif
		1698	/* no timer adjustment, as the monotonic clock doesn't jump */
		1699	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1700	}
		1701	else
		1702	#endif
		1703	{
		1704	ev_rt_now = ev_time ();
		1705
		1706	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1707	{
		1708	#if EV_PERIODIC_ENABLE
1113	periodics_reschedule (EV_A);	1709	periodics_reschedule (EV_A);
1114	# endif	1710	#endif
1115	/* no timer adjustment, as the monotonic clock doesn't jump */	1711	/* adjust timers. this is easy, as the offset is the same for all of them */
1116	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1712	for (i = 1; i <= timercnt; ++i)
		1713	ev_at (timers [i]) += ev_rt_now - mn_now;
1117	}	1714	}
1118	}
1119	else
1120	#endif
1121	{
1122	ev_rt_now = ev_time ();
1123
1124	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1125	{
1126	#if EV_PERIODICS
1127	periodics_reschedule (EV_A);
1128	#endif
1129
1130	/* adjust timers. this is easy, as the offset is the same for all */
1131	for (i = 0; i < timercnt; ++i)
1132	((WT)timers [i])->at += ev_rt_now - mn_now;
1133	}
1134		1715
1135	mn_now = ev_rt_now;	1716	mn_now = ev_rt_now;
1136	}	1717	}
1137	}	1718	}
1138		1719
…		…
1151	static int loop_done;	1732	static int loop_done;
1152		1733
1153	void	1734	void
1154	ev_loop (EV_P_ int flags)	1735	ev_loop (EV_P_ int flags)
1155	{	1736	{
1156	double block;	1737	loop_done = EVUNLOOP_CANCEL;
1157	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1738
		1739	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1158		1740
1159	do	1741	do
1160	{	1742	{
		1743	#ifndef _WIN32
		1744	if (expect_false (curpid)) /* penalise the forking check even more */
		1745	if (expect_false (getpid () != curpid))
		1746	{
		1747	curpid = getpid ();
		1748	postfork = 1;
		1749	}
		1750	#endif
		1751
		1752	#if EV_FORK_ENABLE
		1753	/* we might have forked, so queue fork handlers */
		1754	if (expect_false (postfork))
		1755	if (forkcnt)
		1756	{
		1757	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1758	call_pending (EV_A);
		1759	}
		1760	#endif
		1761
1161	/* queue check watchers (and execute them) */	1762	/* queue prepare watchers (and execute them) */
1162	if (expect_false (preparecnt))	1763	if (expect_false (preparecnt))
1163	{	1764	{
1164	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1765	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1165	call_pending (EV_A);	1766	call_pending (EV_A);
1166	}	1767	}
1167		1768
		1769	if (expect_false (!activecnt))
		1770	break;
		1771
1168	/* we might have forked, so reify kernel state if necessary */	1772	/* we might have forked, so reify kernel state if necessary */
1169	if (expect_false (postfork))	1773	if (expect_false (postfork))
1170	loop_fork (EV_A);	1774	loop_fork (EV_A);
1171		1775
1172	/* update fd-related kernel structures */	1776	/* update fd-related kernel structures */
1173	fd_reify (EV_A);	1777	fd_reify (EV_A);
1174		1778
1175	/* calculate blocking time */	1779	/* calculate blocking time */
		1780	{
		1781	ev_tstamp waittime = 0.;
		1782	ev_tstamp sleeptime = 0.;
1176		1783
1177	/* we only need this for !monotonic clock or timers, but as we basically	1784	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1178	always have timers, we just calculate it always */
1179	#if EV_USE_MONOTONIC
1180	if (expect_true (have_monotonic))
1181	time_update_monotonic (EV_A);
1182	else
1183	#endif
1184	{	1785	{
1185	ev_rt_now = ev_time ();	1786	/* update time to cancel out callback processing overhead */
1186	mn_now = ev_rt_now;	1787	time_update (EV_A_ 1e100);
1187	}
1188		1788
1189	if (flags & EVLOOP_NONBLOCK || idlecnt)
1190	block = 0.;
1191	else
1192	{
1193	block = MAX_BLOCKTIME;	1789	waittime = MAX_BLOCKTIME;
1194		1790
1195	if (timercnt)	1791	if (timercnt)
1196	{	1792	{
1197	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1793	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
1198	if (block > to) block = to;	1794	if (waittime > to) waittime = to;
1199	}	1795	}
1200		1796
1201	#if EV_PERIODICS	1797	#if EV_PERIODIC_ENABLE
1202	if (periodiccnt)	1798	if (periodiccnt)
1203	{	1799	{
1204	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1800	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1205	if (block > to) block = to;	1801	if (waittime > to) waittime = to;
1206	}	1802	}
1207	#endif	1803	#endif
1208		1804
1209	if (block < 0.) block = 0.;	1805	if (expect_false (waittime < timeout_blocktime))
		1806	waittime = timeout_blocktime;
		1807
		1808	sleeptime = waittime - backend_fudge;
		1809
		1810	if (expect_true (sleeptime > io_blocktime))
		1811	sleeptime = io_blocktime;
		1812
		1813	if (sleeptime)
		1814	{
		1815	ev_sleep (sleeptime);
		1816	waittime -= sleeptime;
		1817	}
1210	}	1818	}
1211		1819
1212	method_poll (EV_A_ block);	1820	++loop_count;
		1821	backend_poll (EV_A_ waittime);
1213		1822
1214	/* update ev_rt_now, do magic */	1823	/* update ev_rt_now, do magic */
1215	time_update (EV_A);	1824	time_update (EV_A_ waittime + sleeptime);
		1825	}
1216		1826
1217	/* queue pending timers and reschedule them */	1827	/* queue pending timers and reschedule them */
1218	timers_reify (EV_A); /* relative timers called last */	1828	timers_reify (EV_A); /* relative timers called last */
1219	#if EV_PERIODICS	1829	#if EV_PERIODIC_ENABLE
1220	periodics_reify (EV_A); /* absolute timers called first */	1830	periodics_reify (EV_A); /* absolute timers called first */
1221	#endif	1831	#endif
1222		1832
		1833	#if EV_IDLE_ENABLE
1223	/* queue idle watchers unless io or timers are pending */	1834	/* queue idle watchers unless other events are pending */
1224	if (idlecnt && !any_pending (EV_A))	1835	idle_reify (EV_A);
1225	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1836	#endif
1226		1837
1227	/* queue check watchers, to be executed first */	1838	/* queue check watchers, to be executed first */
1228	if (checkcnt)	1839	if (expect_false (checkcnt))
1229	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1840	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1230		1841
1231	call_pending (EV_A);	1842	call_pending (EV_A);
1232	}	1843	}
1233	while (activecnt && !loop_done);	1844	while (expect_true (
		1845	activecnt
		1846	&& !loop_done
		1847	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1848	));
1234		1849
1235	if (loop_done != 2)	1850	if (loop_done == EVUNLOOP_ONE)
1236	loop_done = 0;	1851	loop_done = EVUNLOOP_CANCEL;
1237	}	1852	}
1238		1853
1239	void	1854	void
1240	ev_unloop (EV_P_ int how)	1855	ev_unloop (EV_P_ int how)
1241	{	1856	{
1242	loop_done = how;	1857	loop_done = how;
1243	}	1858	}
1244		1859
1245	/*****************************************************************************/	1860	/*****************************************************************************/
1246		1861
1247	inline void	1862	void inline_size
1248	wlist_add (WL *head, WL elem)	1863	wlist_add (WL *head, WL elem)
1249	{	1864	{
1250	elem->next = *head;	1865	elem->next = *head;
1251	*head = elem;	1866	*head = elem;
1252	}	1867	}
1253		1868
1254	inline void	1869	void inline_size
1255	wlist_del (WL *head, WL elem)	1870	wlist_del (WL *head, WL elem)
1256	{	1871	{
1257	while (*head)	1872	while (*head)
1258	{	1873	{
1259	if (*head == elem)	1874	if (*head == elem)
…		…
1264		1879
1265	head = &(*head)->next;	1880	head = &(*head)->next;
1266	}	1881	}
1267	}	1882	}
1268		1883
1269	inline void	1884	void inline_speed
1270	ev_clear_pending (EV_P_ W w)	1885	clear_pending (EV_P_ W w)
1271	{	1886	{
1272	if (w->pending)	1887	if (w->pending)
1273	{	1888	{
1274	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1889	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1275	w->pending = 0;	1890	w->pending = 0;
1276	}	1891	}
1277	}	1892	}
1278		1893
1279	inline void	1894	int
		1895	ev_clear_pending (EV_P_ void *w)
		1896	{
		1897	W w_ = (W)w;
		1898	int pending = w_->pending;
		1899
		1900	if (expect_true (pending))
		1901	{
		1902	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1903	w_->pending = 0;
		1904	p->w = 0;
		1905	return p->events;
		1906	}
		1907	else
		1908	return 0;
		1909	}
		1910
		1911	void inline_size
		1912	pri_adjust (EV_P_ W w)
		1913	{
		1914	int pri = w->priority;
		1915	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1916	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1917	w->priority = pri;
		1918	}
		1919
		1920	void inline_speed
1280	ev_start (EV_P_ W w, int active)	1921	ev_start (EV_P_ W w, int active)
1281	{	1922	{
1282	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1923	pri_adjust (EV_A_ w);
1283	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1284
1285	w->active = active;	1924	w->active = active;
1286	ev_ref (EV_A);	1925	ev_ref (EV_A);
1287	}	1926	}
1288		1927
1289	inline void	1928	void inline_size
1290	ev_stop (EV_P_ W w)	1929	ev_stop (EV_P_ W w)
1291	{	1930	{
1292	ev_unref (EV_A);	1931	ev_unref (EV_A);
1293	w->active = 0;	1932	w->active = 0;
1294	}	1933	}
1295		1934
1296	/*****************************************************************************/	1935	/*****************************************************************************/
1297		1936
1298	void	1937	void noinline
1299	ev_io_start (EV_P_ struct ev_io *w)	1938	ev_io_start (EV_P_ ev_io *w)
1300	{	1939	{
1301	int fd = w->fd;	1940	int fd = w->fd;
1302		1941
1303	if (ev_is_active (w))	1942	if (expect_false (ev_is_active (w)))
1304	return;	1943	return;
1305		1944
1306	assert (("ev_io_start called with negative fd", fd >= 0));	1945	assert (("ev_io_start called with negative fd", fd >= 0));
1307		1946
1308	ev_start (EV_A_ (W)w, 1);	1947	ev_start (EV_A_ (W)w, 1);
1309	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1948	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1310	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1949	wlist_add (&anfds[fd].head, (WL)w);
1311		1950
1312	fd_change (EV_A_ fd);	1951	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1952	w->events &= ~EV_IOFDSET;
1313	}	1953	}
1314		1954
1315	void	1955	void noinline
1316	ev_io_stop (EV_P_ struct ev_io *w)	1956	ev_io_stop (EV_P_ ev_io *w)
1317	{	1957	{
1318	ev_clear_pending (EV_A_ (W)w);	1958	clear_pending (EV_A_ (W)w);
1319	if (!ev_is_active (w))	1959	if (expect_false (!ev_is_active (w)))
1320	return;	1960	return;
1321		1961
1322	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1962	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1323		1963
1324	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1964	wlist_del (&anfds[w->fd].head, (WL)w);
1325	ev_stop (EV_A_ (W)w);	1965	ev_stop (EV_A_ (W)w);
1326		1966
1327	fd_change (EV_A_ w->fd);	1967	fd_change (EV_A_ w->fd, 1);
1328	}	1968	}
1329		1969
1330	void	1970	void noinline
1331	ev_timer_start (EV_P_ struct ev_timer *w)	1971	ev_timer_start (EV_P_ ev_timer *w)
1332	{	1972	{
1333	if (ev_is_active (w))	1973	if (expect_false (ev_is_active (w)))
1334	return;	1974	return;
1335		1975
1336	((WT)w)->at += mn_now;	1976	ev_at (w) += mn_now;
1337		1977
1338	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1978	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1339		1979
1340	ev_start (EV_A_ (W)w, ++timercnt);	1980	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1341	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));	1981	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1342	timers [timercnt - 1] = w;	1982	timers [ev_active (w)] = (WT)w;
1343	upheap ((WT *)timers, timercnt - 1);	1983	upheap (timers, ev_active (w));
1344		1984
1345	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1985	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1346	}	1986	}
1347		1987
1348	void	1988	void noinline
1349	ev_timer_stop (EV_P_ struct ev_timer *w)	1989	ev_timer_stop (EV_P_ ev_timer *w)
1350	{	1990	{
1351	ev_clear_pending (EV_A_ (W)w);	1991	clear_pending (EV_A_ (W)w);
1352	if (!ev_is_active (w))	1992	if (expect_false (!ev_is_active (w)))
1353	return;	1993	return;
1354		1994
		1995	{
		1996	int active = ev_active (w);
		1997
1355	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1998	assert (("internal timer heap corruption", timers [active] == (WT)w));
1356		1999
1357	if (((W)w)->active < timercnt--)	2000	if (expect_true (active < timercnt + HEAP0 - 1))
1358	{	2001	{
1359	timers [((W)w)->active - 1] = timers [timercnt];	2002	timers [active] = timers [timercnt + HEAP0 - 1];
1360	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2003	adjustheap (timers, timercnt, active);
1361	}	2004	}
1362		2005
1363	((WT)w)->at -= mn_now;	2006	--timercnt;
		2007	}
		2008
		2009	ev_at (w) -= mn_now;
1364		2010
1365	ev_stop (EV_A_ (W)w);	2011	ev_stop (EV_A_ (W)w);
1366	}	2012	}
1367		2013
1368	void	2014	void noinline
1369	ev_timer_again (EV_P_ struct ev_timer *w)	2015	ev_timer_again (EV_P_ ev_timer *w)
1370	{	2016	{
1371	if (ev_is_active (w))	2017	if (ev_is_active (w))
1372	{	2018	{
1373	if (w->repeat)	2019	if (w->repeat)
1374	{	2020	{
1375	((WT)w)->at = mn_now + w->repeat;	2021	ev_at (w) = mn_now + w->repeat;
1376	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2022	adjustheap (timers, timercnt, ev_active (w));
1377	}	2023	}
1378	else	2024	else
1379	ev_timer_stop (EV_A_ w);	2025	ev_timer_stop (EV_A_ w);
1380	}	2026	}
1381	else if (w->repeat)	2027	else if (w->repeat)
		2028	{
		2029	ev_at (w) = w->repeat;
1382	ev_timer_start (EV_A_ w);	2030	ev_timer_start (EV_A_ w);
		2031	}
1383	}	2032	}
1384		2033
1385	#if EV_PERIODICS	2034	#if EV_PERIODIC_ENABLE
1386	void	2035	void noinline
1387	ev_periodic_start (EV_P_ struct ev_periodic *w)	2036	ev_periodic_start (EV_P_ ev_periodic *w)
1388	{	2037	{
1389	if (ev_is_active (w))	2038	if (expect_false (ev_is_active (w)))
1390	return;	2039	return;
1391		2040
1392	if (w->reschedule_cb)	2041	if (w->reschedule_cb)
1393	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2042	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1394	else if (w->interval)	2043	else if (w->interval)
1395	{	2044	{
1396	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2045	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1397	/* this formula differs from the one in periodic_reify because we do not always round up */	2046	/* this formula differs from the one in periodic_reify because we do not always round up */
1398	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2047	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1399	}	2048	}
		2049	else
		2050	ev_at (w) = w->offset;
1400		2051
1401	ev_start (EV_A_ (W)w, ++periodiccnt);	2052	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1402	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));	2053	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1403	periodics [periodiccnt - 1] = w;	2054	periodics [ev_active (w)] = (WT)w;
1404	upheap ((WT *)periodics, periodiccnt - 1);	2055	upheap (periodics, ev_active (w));
1405		2056
1406	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2057	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1407	}	2058	}
1408		2059
1409	void	2060	void noinline
1410	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2061	ev_periodic_stop (EV_P_ ev_periodic *w)
1411	{	2062	{
1412	ev_clear_pending (EV_A_ (W)w);	2063	clear_pending (EV_A_ (W)w);
1413	if (!ev_is_active (w))	2064	if (expect_false (!ev_is_active (w)))
1414	return;	2065	return;
1415		2066
		2067	{
		2068	int active = ev_active (w);
		2069
1416	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2070	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1417		2071
1418	if (((W)w)->active < periodiccnt--)	2072	if (expect_true (active < periodiccnt + HEAP0 - 1))
1419	{	2073	{
1420	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2074	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1421	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2075	adjustheap (periodics, periodiccnt, active);
1422	}	2076	}
		2077
		2078	--periodiccnt;
		2079	}
1423		2080
1424	ev_stop (EV_A_ (W)w);	2081	ev_stop (EV_A_ (W)w);
1425	}	2082	}
1426		2083
1427	void	2084	void noinline
1428	ev_periodic_again (EV_P_ struct ev_periodic *w)	2085	ev_periodic_again (EV_P_ ev_periodic *w)
1429	{	2086	{
1430	/* TODO: use adjustheap and recalculation */	2087	/* TODO: use adjustheap and recalculation */
1431	ev_periodic_stop (EV_A_ w);	2088	ev_periodic_stop (EV_A_ w);
1432	ev_periodic_start (EV_A_ w);	2089	ev_periodic_start (EV_A_ w);
1433	}	2090	}
1434	#endif	2091	#endif
1435		2092
1436	void
1437	ev_idle_start (EV_P_ struct ev_idle *w)
1438	{
1439	if (ev_is_active (w))
1440	return;
1441
1442	ev_start (EV_A_ (W)w, ++idlecnt);
1443	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1444	idles [idlecnt - 1] = w;
1445	}
1446
1447	void
1448	ev_idle_stop (EV_P_ struct ev_idle *w)
1449	{
1450	ev_clear_pending (EV_A_ (W)w);
1451	if (!ev_is_active (w))
1452	return;
1453
1454	idles [((W)w)->active - 1] = idles [--idlecnt];
1455	ev_stop (EV_A_ (W)w);
1456	}
1457
1458	void
1459	ev_prepare_start (EV_P_ struct ev_prepare *w)
1460	{
1461	if (ev_is_active (w))
1462	return;
1463
1464	ev_start (EV_A_ (W)w, ++preparecnt);
1465	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1466	prepares [preparecnt - 1] = w;
1467	}
1468
1469	void
1470	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1471	{
1472	ev_clear_pending (EV_A_ (W)w);
1473	if (!ev_is_active (w))
1474	return;
1475
1476	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1477	ev_stop (EV_A_ (W)w);
1478	}
1479
1480	void
1481	ev_check_start (EV_P_ struct ev_check *w)
1482	{
1483	if (ev_is_active (w))
1484	return;
1485
1486	ev_start (EV_A_ (W)w, ++checkcnt);
1487	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1488	checks [checkcnt - 1] = w;
1489	}
1490
1491	void
1492	ev_check_stop (EV_P_ struct ev_check *w)
1493	{
1494	ev_clear_pending (EV_A_ (W)w);
1495	if (!ev_is_active (w))
1496	return;
1497
1498	checks [((W)w)->active - 1] = checks [--checkcnt];
1499	ev_stop (EV_A_ (W)w);
1500	}
1501
1502	#ifndef SA_RESTART	2093	#ifndef SA_RESTART
1503	# define SA_RESTART 0	2094	# define SA_RESTART 0
1504	#endif	2095	#endif
1505		2096
1506	void	2097	void noinline
1507	ev_signal_start (EV_P_ struct ev_signal *w)	2098	ev_signal_start (EV_P_ ev_signal *w)
1508	{	2099	{
1509	#if EV_MULTIPLICITY	2100	#if EV_MULTIPLICITY
1510	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2101	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1511	#endif	2102	#endif
1512	if (ev_is_active (w))	2103	if (expect_false (ev_is_active (w)))
1513	return;	2104	return;
1514		2105
1515	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2106	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1516		2107
		2108	evpipe_init (EV_A);
		2109
		2110	{
		2111	#ifndef _WIN32
		2112	sigset_t full, prev;
		2113	sigfillset (&full);
		2114	sigprocmask (SIG_SETMASK, &full, &prev);
		2115	#endif
		2116
		2117	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2118
		2119	#ifndef _WIN32
		2120	sigprocmask (SIG_SETMASK, &prev, 0);
		2121	#endif
		2122	}
		2123
1517	ev_start (EV_A_ (W)w, 1);	2124	ev_start (EV_A_ (W)w, 1);
1518	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1519	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2125	wlist_add (&signals [w->signum - 1].head, (WL)w);
1520		2126
1521	if (!((WL)w)->next)	2127	if (!((WL)w)->next)
1522	{	2128	{
1523	#if _WIN32	2129	#if _WIN32
1524	signal (w->signum, sighandler);	2130	signal (w->signum, ev_sighandler);
1525	#else	2131	#else
1526	struct sigaction sa;	2132	struct sigaction sa;
1527	sa.sa_handler = sighandler;	2133	sa.sa_handler = ev_sighandler;
1528	sigfillset (&sa.sa_mask);	2134	sigfillset (&sa.sa_mask);
1529	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2135	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1530	sigaction (w->signum, &sa, 0);	2136	sigaction (w->signum, &sa, 0);
1531	#endif	2137	#endif
1532	}	2138	}
1533	}	2139	}
1534		2140
1535	void	2141	void noinline
1536	ev_signal_stop (EV_P_ struct ev_signal *w)	2142	ev_signal_stop (EV_P_ ev_signal *w)
1537	{	2143	{
1538	ev_clear_pending (EV_A_ (W)w);	2144	clear_pending (EV_A_ (W)w);
1539	if (!ev_is_active (w))	2145	if (expect_false (!ev_is_active (w)))
1540	return;	2146	return;
1541		2147
1542	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2148	wlist_del (&signals [w->signum - 1].head, (WL)w);
1543	ev_stop (EV_A_ (W)w);	2149	ev_stop (EV_A_ (W)w);
1544		2150
1545	if (!signals [w->signum - 1].head)	2151	if (!signals [w->signum - 1].head)
1546	signal (w->signum, SIG_DFL);	2152	signal (w->signum, SIG_DFL);
1547	}	2153	}
1548		2154
1549	void	2155	void
1550	ev_child_start (EV_P_ struct ev_child *w)	2156	ev_child_start (EV_P_ ev_child *w)
1551	{	2157	{
1552	#if EV_MULTIPLICITY	2158	#if EV_MULTIPLICITY
1553	assert (("child watchers are only supported in the default loop", loop == default_loop));	2159	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1554	#endif	2160	#endif
1555	if (ev_is_active (w))	2161	if (expect_false (ev_is_active (w)))
1556	return;	2162	return;
1557		2163
1558	ev_start (EV_A_ (W)w, 1);	2164	ev_start (EV_A_ (W)w, 1);
1559	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2165	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1560	}	2166	}
1561		2167
1562	void	2168	void
1563	ev_child_stop (EV_P_ struct ev_child *w)	2169	ev_child_stop (EV_P_ ev_child *w)
1564	{	2170	{
1565	ev_clear_pending (EV_A_ (W)w);	2171	clear_pending (EV_A_ (W)w);
1566	if (!ev_is_active (w))	2172	if (expect_false (!ev_is_active (w)))
1567	return;	2173	return;
1568		2174
1569	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2175	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1570	ev_stop (EV_A_ (W)w);	2176	ev_stop (EV_A_ (W)w);
1571	}	2177	}
1572		2178
		2179	#if EV_STAT_ENABLE
		2180
		2181	# ifdef _WIN32
		2182	# undef lstat
		2183	# define lstat(a,b) _stati64 (a,b)
		2184	# endif
		2185
		2186	#define DEF_STAT_INTERVAL 5.0074891
		2187	#define MIN_STAT_INTERVAL 0.1074891
		2188
		2189	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2190
		2191	#if EV_USE_INOTIFY
		2192	# define EV_INOTIFY_BUFSIZE 8192
		2193
		2194	static void noinline
		2195	infy_add (EV_P_ ev_stat *w)
		2196	{
		2197	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);
		2198
		2199	if (w->wd < 0)
		2200	{
		2201	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2202
		2203	/* monitor some parent directory for speedup hints */
		2204	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2205	/* but an efficiency issue only */
		2206	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2207	{
		2208	char path [4096];
		2209	strcpy (path, w->path);
		2210
		2211	do
		2212	{
		2213	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2214	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2215
		2216	char *pend = strrchr (path, '/');
		2217
		2218	if (!pend)
		2219	break; /* whoops, no '/', complain to your admin */
		2220
		2221	*pend = 0;
		2222	w->wd = inotify_add_watch (fs_fd, path, mask);
		2223	}
		2224	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2225	}
		2226	}
		2227	else
		2228	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2229
		2230	if (w->wd >= 0)
		2231	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2232	}
		2233
		2234	static void noinline
		2235	infy_del (EV_P_ ev_stat *w)
		2236	{
		2237	int slot;
		2238	int wd = w->wd;
		2239
		2240	if (wd < 0)
		2241	return;
		2242
		2243	w->wd = -2;
		2244	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2245	wlist_del (&fs_hash [slot].head, (WL)w);
		2246
		2247	/* remove this watcher, if others are watching it, they will rearm */
		2248	inotify_rm_watch (fs_fd, wd);
		2249	}
		2250
		2251	static void noinline
		2252	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2253	{
		2254	if (slot < 0)
		2255	/* overflow, need to check for all hahs slots */
		2256	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2257	infy_wd (EV_A_ slot, wd, ev);
		2258	else
		2259	{
		2260	WL w_;
		2261
		2262	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2263	{
		2264	ev_stat *w = (ev_stat *)w_;
		2265	w_ = w_->next; /* lets us remove this watcher and all before it */
		2266
		2267	if (w->wd == wd || wd == -1)
		2268	{
		2269	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2270	{
		2271	w->wd = -1;
		2272	infy_add (EV_A_ w); /* re-add, no matter what */
		2273	}
		2274
		2275	stat_timer_cb (EV_A_ &w->timer, 0);
		2276	}
		2277	}
		2278	}
		2279	}
		2280
		2281	static void
		2282	infy_cb (EV_P_ ev_io *w, int revents)
		2283	{
		2284	char buf [EV_INOTIFY_BUFSIZE];
		2285	struct inotify_event *ev = (struct inotify_event *)buf;
		2286	int ofs;
		2287	int len = read (fs_fd, buf, sizeof (buf));
		2288
		2289	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2290	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2291	}
		2292
		2293	void inline_size
		2294	infy_init (EV_P)
		2295	{
		2296	if (fs_fd != -2)
		2297	return;
		2298
		2299	fs_fd = inotify_init ();
		2300
		2301	if (fs_fd >= 0)
		2302	{
		2303	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2304	ev_set_priority (&fs_w, EV_MAXPRI);
		2305	ev_io_start (EV_A_ &fs_w);
		2306	}
		2307	}
		2308
		2309	void inline_size
		2310	infy_fork (EV_P)
		2311	{
		2312	int slot;
		2313
		2314	if (fs_fd < 0)
		2315	return;
		2316
		2317	close (fs_fd);
		2318	fs_fd = inotify_init ();
		2319
		2320	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2321	{
		2322	WL w_ = fs_hash [slot].head;
		2323	fs_hash [slot].head = 0;
		2324
		2325	while (w_)
		2326	{
		2327	ev_stat *w = (ev_stat *)w_;
		2328	w_ = w_->next; /* lets us add this watcher */
		2329
		2330	w->wd = -1;
		2331
		2332	if (fs_fd >= 0)
		2333	infy_add (EV_A_ w); /* re-add, no matter what */
		2334	else
		2335	ev_timer_start (EV_A_ &w->timer);
		2336	}
		2337
		2338	}
		2339	}
		2340
		2341	#endif
		2342
		2343	void
		2344	ev_stat_stat (EV_P_ ev_stat *w)
		2345	{
		2346	if (lstat (w->path, &w->attr) < 0)
		2347	w->attr.st_nlink = 0;
		2348	else if (!w->attr.st_nlink)
		2349	w->attr.st_nlink = 1;
		2350	}
		2351
		2352	static void noinline
		2353	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2354	{
		2355	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2356
		2357	/* we copy this here each the time so that */
		2358	/* prev has the old value when the callback gets invoked */
		2359	w->prev = w->attr;
		2360	ev_stat_stat (EV_A_ w);
		2361
		2362	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2363	if (
		2364	w->prev.st_dev != w->attr.st_dev
		2365	|| w->prev.st_ino != w->attr.st_ino
		2366	|| w->prev.st_mode != w->attr.st_mode
		2367	|| w->prev.st_nlink != w->attr.st_nlink
		2368	|| w->prev.st_uid != w->attr.st_uid
		2369	|| w->prev.st_gid != w->attr.st_gid
		2370	|| w->prev.st_rdev != w->attr.st_rdev
		2371	|| w->prev.st_size != w->attr.st_size
		2372	|| w->prev.st_atime != w->attr.st_atime
		2373	|| w->prev.st_mtime != w->attr.st_mtime
		2374	|| w->prev.st_ctime != w->attr.st_ctime
		2375	) {
		2376	#if EV_USE_INOTIFY
		2377	infy_del (EV_A_ w);
		2378	infy_add (EV_A_ w);
		2379	ev_stat_stat (EV_A_ w); /* avoid race... */
		2380	#endif
		2381
		2382	ev_feed_event (EV_A_ w, EV_STAT);
		2383	}
		2384	}
		2385
		2386	void
		2387	ev_stat_start (EV_P_ ev_stat *w)
		2388	{
		2389	if (expect_false (ev_is_active (w)))
		2390	return;
		2391
		2392	/* since we use memcmp, we need to clear any padding data etc. */
		2393	memset (&w->prev, 0, sizeof (ev_statdata));
		2394	memset (&w->attr, 0, sizeof (ev_statdata));
		2395
		2396	ev_stat_stat (EV_A_ w);
		2397
		2398	if (w->interval < MIN_STAT_INTERVAL)
		2399	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2400
		2401	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2402	ev_set_priority (&w->timer, ev_priority (w));
		2403
		2404	#if EV_USE_INOTIFY
		2405	infy_init (EV_A);
		2406
		2407	if (fs_fd >= 0)
		2408	infy_add (EV_A_ w);
		2409	else
		2410	#endif
		2411	ev_timer_start (EV_A_ &w->timer);
		2412
		2413	ev_start (EV_A_ (W)w, 1);
		2414	}
		2415
		2416	void
		2417	ev_stat_stop (EV_P_ ev_stat *w)
		2418	{
		2419	clear_pending (EV_A_ (W)w);
		2420	if (expect_false (!ev_is_active (w)))
		2421	return;
		2422
		2423	#if EV_USE_INOTIFY
		2424	infy_del (EV_A_ w);
		2425	#endif
		2426	ev_timer_stop (EV_A_ &w->timer);
		2427
		2428	ev_stop (EV_A_ (W)w);
		2429	}
		2430	#endif
		2431
		2432	#if EV_IDLE_ENABLE
		2433	void
		2434	ev_idle_start (EV_P_ ev_idle *w)
		2435	{
		2436	if (expect_false (ev_is_active (w)))
		2437	return;
		2438
		2439	pri_adjust (EV_A_ (W)w);
		2440
		2441	{
		2442	int active = ++idlecnt [ABSPRI (w)];
		2443
		2444	++idleall;
		2445	ev_start (EV_A_ (W)w, active);
		2446
		2447	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2448	idles [ABSPRI (w)][active - 1] = w;
		2449	}
		2450	}
		2451
		2452	void
		2453	ev_idle_stop (EV_P_ ev_idle *w)
		2454	{
		2455	clear_pending (EV_A_ (W)w);
		2456	if (expect_false (!ev_is_active (w)))
		2457	return;
		2458
		2459	{
		2460	int active = ev_active (w);
		2461
		2462	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2463	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2464
		2465	ev_stop (EV_A_ (W)w);
		2466	--idleall;
		2467	}
		2468	}
		2469	#endif
		2470
		2471	void
		2472	ev_prepare_start (EV_P_ ev_prepare *w)
		2473	{
		2474	if (expect_false (ev_is_active (w)))
		2475	return;
		2476
		2477	ev_start (EV_A_ (W)w, ++preparecnt);
		2478	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2479	prepares [preparecnt - 1] = w;
		2480	}
		2481
		2482	void
		2483	ev_prepare_stop (EV_P_ ev_prepare *w)
		2484	{
		2485	clear_pending (EV_A_ (W)w);
		2486	if (expect_false (!ev_is_active (w)))
		2487	return;
		2488
		2489	{
		2490	int active = ev_active (w);
		2491
		2492	prepares [active - 1] = prepares [--preparecnt];
		2493	ev_active (prepares [active - 1]) = active;
		2494	}
		2495
		2496	ev_stop (EV_A_ (W)w);
		2497	}
		2498
		2499	void
		2500	ev_check_start (EV_P_ ev_check *w)
		2501	{
		2502	if (expect_false (ev_is_active (w)))
		2503	return;
		2504
		2505	ev_start (EV_A_ (W)w, ++checkcnt);
		2506	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2507	checks [checkcnt - 1] = w;
		2508	}
		2509
		2510	void
		2511	ev_check_stop (EV_P_ ev_check *w)
		2512	{
		2513	clear_pending (EV_A_ (W)w);
		2514	if (expect_false (!ev_is_active (w)))
		2515	return;
		2516
		2517	{
		2518	int active = ev_active (w);
		2519
		2520	checks [active - 1] = checks [--checkcnt];
		2521	ev_active (checks [active - 1]) = active;
		2522	}
		2523
		2524	ev_stop (EV_A_ (W)w);
		2525	}
		2526
		2527	#if EV_EMBED_ENABLE
		2528	void noinline
		2529	ev_embed_sweep (EV_P_ ev_embed *w)
		2530	{
		2531	ev_loop (w->other, EVLOOP_NONBLOCK);
		2532	}
		2533
		2534	static void
		2535	embed_io_cb (EV_P_ ev_io *io, int revents)
		2536	{
		2537	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2538
		2539	if (ev_cb (w))
		2540	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2541	else
		2542	ev_loop (w->other, EVLOOP_NONBLOCK);
		2543	}
		2544
		2545	static void
		2546	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2547	{
		2548	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2549
		2550	{
		2551	struct ev_loop *loop = w->other;
		2552
		2553	while (fdchangecnt)
		2554	{
		2555	fd_reify (EV_A);
		2556	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2557	}
		2558	}
		2559	}
		2560
		2561	#if 0
		2562	static void
		2563	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2564	{
		2565	ev_idle_stop (EV_A_ idle);
		2566	}
		2567	#endif
		2568
		2569	void
		2570	ev_embed_start (EV_P_ ev_embed *w)
		2571	{
		2572	if (expect_false (ev_is_active (w)))
		2573	return;
		2574
		2575	{
		2576	struct ev_loop *loop = w->other;
		2577	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2578	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2579	}
		2580
		2581	ev_set_priority (&w->io, ev_priority (w));
		2582	ev_io_start (EV_A_ &w->io);
		2583
		2584	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2585	ev_set_priority (&w->prepare, EV_MINPRI);
		2586	ev_prepare_start (EV_A_ &w->prepare);
		2587
		2588	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2589
		2590	ev_start (EV_A_ (W)w, 1);
		2591	}
		2592
		2593	void
		2594	ev_embed_stop (EV_P_ ev_embed *w)
		2595	{
		2596	clear_pending (EV_A_ (W)w);
		2597	if (expect_false (!ev_is_active (w)))
		2598	return;
		2599
		2600	ev_io_stop (EV_A_ &w->io);
		2601	ev_prepare_stop (EV_A_ &w->prepare);
		2602
		2603	ev_stop (EV_A_ (W)w);
		2604	}
		2605	#endif
		2606
		2607	#if EV_FORK_ENABLE
		2608	void
		2609	ev_fork_start (EV_P_ ev_fork *w)
		2610	{
		2611	if (expect_false (ev_is_active (w)))
		2612	return;
		2613
		2614	ev_start (EV_A_ (W)w, ++forkcnt);
		2615	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2616	forks [forkcnt - 1] = w;
		2617	}
		2618
		2619	void
		2620	ev_fork_stop (EV_P_ ev_fork *w)
		2621	{
		2622	clear_pending (EV_A_ (W)w);
		2623	if (expect_false (!ev_is_active (w)))
		2624	return;
		2625
		2626	{
		2627	int active = ev_active (w);
		2628
		2629	forks [active - 1] = forks [--forkcnt];
		2630	ev_active (forks [active - 1]) = active;
		2631	}
		2632
		2633	ev_stop (EV_A_ (W)w);
		2634	}
		2635	#endif
		2636
		2637	#if EV_ASYNC_ENABLE
		2638	void
		2639	ev_async_start (EV_P_ ev_async *w)
		2640	{
		2641	if (expect_false (ev_is_active (w)))
		2642	return;
		2643
		2644	evpipe_init (EV_A);
		2645
		2646	ev_start (EV_A_ (W)w, ++asynccnt);
		2647	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2648	asyncs [asynccnt - 1] = w;
		2649	}
		2650
		2651	void
		2652	ev_async_stop (EV_P_ ev_async *w)
		2653	{
		2654	clear_pending (EV_A_ (W)w);
		2655	if (expect_false (!ev_is_active (w)))
		2656	return;
		2657
		2658	{
		2659	int active = ev_active (w);
		2660
		2661	asyncs [active - 1] = asyncs [--asynccnt];
		2662	ev_active (asyncs [active - 1]) = active;
		2663	}
		2664
		2665	ev_stop (EV_A_ (W)w);
		2666	}
		2667
		2668	void
		2669	ev_async_send (EV_P_ ev_async *w)
		2670	{
		2671	w->sent = 1;
		2672	evpipe_write (EV_A_ &gotasync);
		2673	}
		2674	#endif
		2675
1573	/*****************************************************************************/	2676	/*****************************************************************************/
1574		2677
1575	struct ev_once	2678	struct ev_once
1576	{	2679	{
1577	struct ev_io io;	2680	ev_io io;
1578	struct ev_timer to;	2681	ev_timer to;
1579	void (*cb)(int revents, void *arg);	2682	void (*cb)(int revents, void *arg);
1580	void *arg;	2683	void *arg;
1581	};	2684	};
1582		2685
1583	static void	2686	static void
…		…
1592		2695
1593	cb (revents, arg);	2696	cb (revents, arg);
1594	}	2697	}
1595		2698
1596	static void	2699	static void
1597	once_cb_io (EV_P_ struct ev_io *w, int revents)	2700	once_cb_io (EV_P_ ev_io *w, int revents)
1598	{	2701	{
1599	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2702	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1600	}	2703	}
1601		2704
1602	static void	2705	static void
1603	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2706	once_cb_to (EV_P_ ev_timer *w, int revents)
1604	{	2707	{
1605	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2708	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1606	}	2709	}
1607		2710
1608	void	2711	void
1609	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2712	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1610	{	2713	{
1611	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	2714	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1612		2715
1613	if (!once)	2716	if (expect_false (!once))
		2717	{
1614	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2718	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1615	else	2719	return;
1616	{	2720	}
		2721
1617	once->cb = cb;	2722	once->cb = cb;
1618	once->arg = arg;	2723	once->arg = arg;
1619		2724
1620	ev_init (&once->io, once_cb_io);	2725	ev_init (&once->io, once_cb_io);
1621	if (fd >= 0)	2726	if (fd >= 0)
1622	{	2727	{
1623	ev_io_set (&once->io, fd, events);	2728	ev_io_set (&once->io, fd, events);
1624	ev_io_start (EV_A_ &once->io);	2729	ev_io_start (EV_A_ &once->io);
1625	}	2730	}
1626		2731
1627	ev_init (&once->to, once_cb_to);	2732	ev_init (&once->to, once_cb_to);
1628	if (timeout >= 0.)	2733	if (timeout >= 0.)
1629	{	2734	{
1630	ev_timer_set (&once->to, timeout, 0.);	2735	ev_timer_set (&once->to, timeout, 0.);
1631	ev_timer_start (EV_A_ &once->to);	2736	ev_timer_start (EV_A_ &once->to);
1632	}
1633	}	2737	}
1634	}	2738	}
		2739
		2740	#if EV_MULTIPLICITY
		2741	#include "ev_wrap.h"
		2742	#endif
1635		2743
1636	#ifdef __cplusplus	2744	#ifdef __cplusplus
1637	}	2745	}
1638	#endif	2746	#endif
1639		2747

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