ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC vs.
Revision 1.230 by root, Fri May 2 08:13:16 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
31	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# include "config.h"	49	# include "config.h"
		50	# endif
33		51
34	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
37	# endif	66	# endif
38		67
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
40	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
41	# endif	74	# endif
42		75
43	# if HAVE_POLL && HAVE_POLL_H	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
44	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
45	# endif	82	# endif
46		83
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
48	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
49	# endif	90	# endif
50		91
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
53	# endif	98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
54		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
55	#endif	132	#endif
56		133
57	#include <math.h>	134	#include <math.h>
58	#include <stdlib.h>	135	#include <stdlib.h>
59	#include <unistd.h>
60	#include <fcntl.h>	136	#include <fcntl.h>
61	#include <signal.h>
62	#include <stddef.h>	137	#include <stddef.h>
63		138
64	#include <stdio.h>	139	#include <stdio.h>
65		140
66	#include <assert.h>	141	#include <assert.h>
67	#include <errno.h>	142	#include <errno.h>
68	#include <sys/types.h>	143	#include <sys/types.h>
		144	#include <time.h>
		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
69	#ifndef WIN32	154	#ifndef _WIN32
		155	# include <sys/time.h>
70	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
71	#endif	163	# endif
72	#include <sys/time.h>	164	#endif
73	#include <time.h>
74		165
75	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
76		167
77	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
78	# 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
79	#endif	178	#endif
80		179
81	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
82	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
83	#endif	182	#endif
84		183
85	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
87	#endif	190	#endif
88		191
89	#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
90	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
91	#endif	198	#endif
92		199
93	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
94	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
95	#endif	202	#endif
96		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
97	#ifndef EV_USE_WIN32	208	#ifndef EV_USE_INOTIFY
98	# ifdef WIN32	209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
99	# define EV_USE_WIN32 1	210	# define EV_USE_INOTIFY 1
100	# else	211	# else
101	# define EV_USE_WIN32 0	212	# define EV_USE_INOTIFY 0
102	# endif	213	# endif
103	#endif	214	#endif
104		215
105	#ifndef EV_USE_REALTIME	216	#ifndef EV_PID_HASHSIZE
106	# define EV_USE_REALTIME 1	217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
107	#endif	221	# endif
		222	#endif
108		223
109	/**/	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 */
110		241
111	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
112	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
113	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
114	#endif	245	#endif
…		…
116	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
117	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
118	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
119	#endif	250	#endif
120		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
121	/**/	283	/**/
122		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
123	#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) */
124	#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) */
125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
127		298
128	#include "ev.h"
129
130	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
131	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
132	# define inline inline	301	# define noinline __attribute__ ((noinline))
133	#else	302	#else
134	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
135	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
136	#endif	308	#endif
137		309
138	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
139	#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
140		319
141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
143		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
144	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
145	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
146	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
147		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 */
148	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
149		338
150	#if WIN32	339	#ifdef _WIN32
151	/* note: the comment below could not be substantiated, but what would I care */	340	# include "ev_win32.c"
152	/* MSDN says this is required to handle SIGFPE */
153	volatile double SIGFPE_REQ = 0.0f;
154	#endif	341	#endif
155		342
156	/*****************************************************************************/	343	/*****************************************************************************/
157		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		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
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
158	typedef struct	410	typedef struct
159	{	411	{
160	struct ev_watcher_list *head;	412	WL head;
161	unsigned char events;	413	unsigned char events;
162	unsigned char reify;	414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
163	} ANFD;	418	} ANFD;
164		419
165	typedef struct	420	typedef struct
166	{	421	{
167	W w;	422	W w;
168	int events;	423	int events;
169	} ANPENDING;	424	} ANPENDING;
170		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
171	#if EV_MULTIPLICITY	433	#if EV_MULTIPLICITY
172		434
173	struct ev_loop	435	struct ev_loop
174	{	436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
175	# define VAR(name,decl) decl;	439	#define VAR(name,decl) decl;
176	# include "ev_vars.h"	440	#include "ev_vars.h"
177	};
178	# undef VAR	441	#undef VAR
		442	};
179	# include "ev_wrap.h"	443	#include "ev_wrap.h"
		444
		445	static struct ev_loop default_loop_struct;
		446	struct ev_loop *ev_default_loop_ptr;
180		447
181	#else	448	#else
182		449
		450	ev_tstamp ev_rt_now;
183	# define VAR(name,decl) static decl;	451	#define VAR(name,decl) static decl;
184	# include "ev_vars.h"	452	#include "ev_vars.h"
185	# undef VAR	453	#undef VAR
		454
		455	static int ev_default_loop_ptr;
186		456
187	#endif	457	#endif
188		458
189	/*****************************************************************************/	459	/*****************************************************************************/
190		460
191	inline ev_tstamp	461	ev_tstamp
192	ev_time (void)	462	ev_time (void)
193	{	463	{
194	#if EV_USE_REALTIME	464	#if EV_USE_REALTIME
195	struct timespec ts;	465	struct timespec ts;
196	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
…		…
200	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
201	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
202	#endif	472	#endif
203	}	473	}
204		474
205	inline ev_tstamp	475	ev_tstamp inline_size
206	get_clock (void)	476	get_clock (void)
207	{	477	{
208	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
209	if (expect_true (have_monotonic))	479	if (expect_true (have_monotonic))
210	{	480	{
…		…
215	#endif	485	#endif
216		486
217	return ev_time ();	487	return ev_time ();
218	}	488	}
219		489
		490	#if EV_MULTIPLICITY
220	ev_tstamp	491	ev_tstamp
221	ev_now (EV_P)	492	ev_now (EV_P)
222	{	493	{
223	return rt_now;	494	return ev_rt_now;
224	}	495	}
		496	#endif
225		497
226	#define array_roundsize(base,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;
227		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	int inline_size
		526	array_nextsize (int elem, int cur, int cnt)
		527	{
		528	int ncur = cur + 1;
		529
		530	do
		531	ncur <<= 1;
		532	while (cnt > ncur);
		533
		534	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		535	if (elem * ncur > 4096)
		536	{
		537	ncur *= elem;
		538	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		539	ncur = ncur - sizeof (void *) * 4;
		540	ncur /= elem;
		541	}
		542
		543	return ncur;
		544	}
		545
		546	static noinline void *
		547	array_realloc (int elem, void *base, int *cur, int cnt)
		548	{
		549	*cur = array_nextsize (elem, *cur, cnt);
		550	return ev_realloc (base, elem * *cur);
		551	}
		552
228	#define array_needsize(base,cur,cnt,init) \	553	#define array_needsize(type,base,cur,cnt,init) \
229	if (expect_false ((cnt) > cur)) \	554	if (expect_false ((cnt) > (cur))) \
230	{ \	555	{ \
231	int newcnt = cur; \	556	int ocur_ = (cur); \
232	do \	557	(base) = (type *)array_realloc \
233	{ \	558	(sizeof (type), (base), &(cur), (cnt)); \
234	newcnt = array_roundsize (base, newcnt << 1); \	559	init ((base) + (ocur_), (cur) - ocur_); \
235	} \
236	while ((cnt) > newcnt); \
237	\
238	base = realloc (base, sizeof (*base) * (newcnt)); \
239	init (base + cur, newcnt - cur); \
240	cur = newcnt; \
241	}	560	}
242		561
		562	#if 0
243	#define array_slim(stem) \	563	#define array_slim(type,stem) \
244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	564	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
245	{ \	565	{ \
246	stem ## max = array_roundsize (stem ## cnt >> 1); \	566	stem ## max = array_roundsize (stem ## cnt >> 1); \
247	base = realloc (base, sizeof (*base) * (stem ## max)); \	567	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	568	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
249	}	569	}
		570	#endif
250		571
251	#define array_free(stem, idx) \	572	#define array_free(stem, idx) \
252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	573	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
253		574
254	/*****************************************************************************/	575	/*****************************************************************************/
255		576
256	static void	577	void noinline
		578	ev_feed_event (EV_P_ void *w, int revents)
		579	{
		580	W w_ = (W)w;
		581	int pri = ABSPRI (w_);
		582
		583	if (expect_false (w_->pending))
		584	pendings [pri][w_->pending - 1].events |= revents;
		585	else
		586	{
		587	w_->pending = ++pendingcnt [pri];
		588	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		589	pendings [pri][w_->pending - 1].w = w_;
		590	pendings [pri][w_->pending - 1].events = revents;
		591	}
		592	}
		593
		594	void inline_speed
		595	queue_events (EV_P_ W *events, int eventcnt, int type)
		596	{
		597	int i;
		598
		599	for (i = 0; i < eventcnt; ++i)
		600	ev_feed_event (EV_A_ events [i], type);
		601	}
		602
		603	/*****************************************************************************/
		604
		605	void inline_size
257	anfds_init (ANFD *base, int count)	606	anfds_init (ANFD *base, int count)
258	{	607	{
259	while (count--)	608	while (count--)
260	{	609	{
261	base->head = 0;	610	base->head = 0;
…		…
264		613
265	++base;	614	++base;
266	}	615	}
267	}	616	}
268		617
269	static void	618	void inline_speed
270	event (EV_P_ W w, int events)
271	{
272	if (w->pending)
273	{
274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
275	return;
276	}
277
278	w->pending = ++pendingcnt [ABSPRI (w)];
279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
280	pendings [ABSPRI (w)][w->pending - 1].w = w;
281	pendings [ABSPRI (w)][w->pending - 1].events = events;
282	}
283
284	static void
285	queue_events (EV_P_ W *events, int eventcnt, int type)
286	{
287	int i;
288
289	for (i = 0; i < eventcnt; ++i)
290	event (EV_A_ events [i], type);
291	}
292
293	static void
294	fd_event (EV_P_ int fd, int events)	619	fd_event (EV_P_ int fd, int revents)
295	{	620	{
296	ANFD *anfd = anfds + fd;	621	ANFD *anfd = anfds + fd;
297	struct ev_io *w;	622	ev_io *w;
298		623
299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	624	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
300	{	625	{
301	int ev = w->events & events;	626	int ev = w->events & revents;
302		627
303	if (ev)	628	if (ev)
304	event (EV_A_ (W)w, ev);	629	ev_feed_event (EV_A_ (W)w, ev);
305	}	630	}
306	}	631	}
307		632
308	/*****************************************************************************/	633	void
		634	ev_feed_fd_event (EV_P_ int fd, int revents)
		635	{
		636	if (fd >= 0 && fd < anfdmax)
		637	fd_event (EV_A_ fd, revents);
		638	}
309		639
310	static void	640	void inline_size
311	fd_reify (EV_P)	641	fd_reify (EV_P)
312	{	642	{
313	int i;	643	int i;
314		644
315	for (i = 0; i < fdchangecnt; ++i)	645	for (i = 0; i < fdchangecnt; ++i)
316	{	646	{
317	int fd = fdchanges [i];	647	int fd = fdchanges [i];
318	ANFD *anfd = anfds + fd;	648	ANFD *anfd = anfds + fd;
319	struct ev_io *w;	649	ev_io *w;
320		650
321	int events = 0;	651	unsigned char events = 0;
322		652
323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	653	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
324	events |= w->events;	654	events |= (unsigned char)w->events;
325		655
		656	#if EV_SELECT_IS_WINSOCKET
		657	if (events)
		658	{
		659	unsigned long argp;
		660	#ifdef EV_FD_TO_WIN32_HANDLE
		661	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		662	#else
		663	anfd->handle = _get_osfhandle (fd);
		664	#endif
		665	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		666	}
		667	#endif
		668
		669	{
		670	unsigned char o_events = anfd->events;
		671	unsigned char o_reify = anfd->reify;
		672
326	anfd->reify = 0;	673	anfd->reify = 0;
327
328	method_modify (EV_A_ fd, anfd->events, events);
329	anfd->events = events;	674	anfd->events = events;
		675
		676	if (o_events != events || o_reify & EV_IOFDSET)
		677	backend_modify (EV_A_ fd, o_events, events);
		678	}
330	}	679	}
331		680
332	fdchangecnt = 0;	681	fdchangecnt = 0;
333	}	682	}
334		683
335	static void	684	void inline_size
336	fd_change (EV_P_ int fd)	685	fd_change (EV_P_ int fd, int flags)
337	{	686	{
338	if (anfds [fd].reify || fdchangecnt < 0)	687	unsigned char reify = anfds [fd].reify;
339	return;
340
341	anfds [fd].reify = 1;	688	anfds [fd].reify |= flags;
342		689
		690	if (expect_true (!reify))
		691	{
343	++fdchangecnt;	692	++fdchangecnt;
344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	693	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
345	fdchanges [fdchangecnt - 1] = fd;	694	fdchanges [fdchangecnt - 1] = fd;
		695	}
346	}	696	}
347		697
348	static void	698	void inline_speed
349	fd_kill (EV_P_ int fd)	699	fd_kill (EV_P_ int fd)
350	{	700	{
351	struct ev_io *w;	701	ev_io *w;
352		702
353	while ((w = (struct ev_io *)anfds [fd].head))	703	while ((w = (ev_io *)anfds [fd].head))
354	{	704	{
355	ev_io_stop (EV_A_ w);	705	ev_io_stop (EV_A_ w);
356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	706	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
357	}	707	}
		708	}
		709
		710	int inline_size
		711	fd_valid (int fd)
		712	{
		713	#ifdef _WIN32
		714	return _get_osfhandle (fd) != -1;
		715	#else
		716	return fcntl (fd, F_GETFD) != -1;
		717	#endif
358	}	718	}
359		719
360	/* called on EBADF to verify fds */	720	/* called on EBADF to verify fds */
361	static void	721	static void noinline
362	fd_ebadf (EV_P)	722	fd_ebadf (EV_P)
363	{	723	{
364	int fd;	724	int fd;
365		725
366	for (fd = 0; fd < anfdmax; ++fd)	726	for (fd = 0; fd < anfdmax; ++fd)
367	if (anfds [fd].events)	727	if (anfds [fd].events)
368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	728	if (!fd_valid (fd) == -1 && errno == EBADF)
369	fd_kill (EV_A_ fd);	729	fd_kill (EV_A_ fd);
370	}	730	}
371		731
372	/* called on ENOMEM in select/poll to kill some fds and retry */	732	/* called on ENOMEM in select/poll to kill some fds and retry */
373	static void	733	static void noinline
374	fd_enomem (EV_P)	734	fd_enomem (EV_P)
375	{	735	{
376	int fd;	736	int fd;
377		737
378	for (fd = anfdmax; fd--; )	738	for (fd = anfdmax; fd--; )
379	if (anfds [fd].events)	739	if (anfds [fd].events)
380	{	740	{
381	close (fd);
382	fd_kill (EV_A_ fd);	741	fd_kill (EV_A_ fd);
383	return;	742	return;
384	}	743	}
385	}	744	}
386		745
387	/* susually called after fork if method needs to re-arm all fds from scratch */	746	/* usually called after fork if backend needs to re-arm all fds from scratch */
388	static void	747	static void noinline
389	fd_rearm_all (EV_P)	748	fd_rearm_all (EV_P)
390	{	749	{
391	int fd;	750	int fd;
392		751
393	/* this should be highly optimised to not do anything but set a flag */
394	for (fd = 0; fd < anfdmax; ++fd)	752	for (fd = 0; fd < anfdmax; ++fd)
395	if (anfds [fd].events)	753	if (anfds [fd].events)
396	{	754	{
397	anfds [fd].events = 0;	755	anfds [fd].events = 0;
398	fd_change (EV_A_ fd);	756	fd_change (EV_A_ fd, EV_IOFDSET | 1);
399	}	757	}
400	}	758	}
401		759
402	/*****************************************************************************/	760	/*****************************************************************************/
403		761
404	static void	762	/* towards the root */
		763	void inline_speed
405	upheap (WT *heap, int k)	764	upheap (WT *heap, int k)
406	{	765	{
407	WT w = heap [k];	766	WT w = heap [k];
408		767
409	while (k && heap [k >> 1]->at > w->at)	768	for (;;)
410	{	769	{
		770	int p = k >> 1;
		771
		772	/* maybe we could use a dummy element at heap [0]? */
		773	if (!p || heap [p]->at <= w->at)
		774	break;
		775
411	heap [k] = heap [k >> 1];	776	heap [k] = heap [p];
412	((W)heap [k])->active = k + 1;	777	ev_active (heap [k]) = k;
413	k >>= 1;	778	k = p;
414	}	779	}
415		780
416	heap [k] = w;	781	heap [k] = w;
417	((W)heap [k])->active = k + 1;	782	ev_active (heap [k]) = k;
418
419	}	783	}
420		784
421	static void	785	/* away from the root */
		786	void inline_speed
422	downheap (WT *heap, int N, int k)	787	downheap (WT *heap, int N, int k)
423	{	788	{
424	WT w = heap [k];	789	WT w = heap [k];
425		790
426	while (k < (N >> 1))	791	for (;;)
427	{	792	{
428	int j = k << 1;	793	int c = k << 1;
429		794
430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	795	if (c > N)
431	++j;
432
433	if (w->at <= heap [j]->at)
434	break;	796	break;
435		797
		798	c += c < N && heap [c]->at > heap [c + 1]->at
		799	? 1 : 0;
		800
		801	if (w->at <= heap [c]->at)
		802	break;
		803
436	heap [k] = heap [j];	804	heap [k] = heap [c];
437	((W)heap [k])->active = k + 1;	805	ev_active (heap [k]) = k;
		806
438	k = j;	807	k = c;
439	}	808	}
440		809
441	heap [k] = w;	810	heap [k] = w;
442	((W)heap [k])->active = k + 1;	811	ev_active (heap [k]) = k;
		812	}
		813
		814	void inline_size
		815	adjustheap (WT *heap, int N, int k)
		816	{
		817	upheap (heap, k);
		818	downheap (heap, N, k);
443	}	819	}
444		820
445	/*****************************************************************************/	821	/*****************************************************************************/
446		822
447	typedef struct	823	typedef struct
448	{	824	{
449	struct ev_watcher_list *head;	825	WL head;
450	sig_atomic_t volatile gotsig;	826	EV_ATOMIC_T gotsig;
451	} ANSIG;	827	} ANSIG;
452		828
453	static ANSIG *signals;	829	static ANSIG *signals;
454	static int signalmax;	830	static int signalmax;
455		831
456	static int sigpipe [2];	832	static EV_ATOMIC_T gotsig;
457	static sig_atomic_t volatile gotsig;
458	static struct ev_io sigev;
459		833
460	static void	834	void inline_size
461	signals_init (ANSIG *base, int count)	835	signals_init (ANSIG *base, int count)
462	{	836	{
463	while (count--)	837	while (count--)
464	{	838	{
465	base->head = 0;	839	base->head = 0;
…		…
467		841
468	++base;	842	++base;
469	}	843	}
470	}	844	}
471		845
		846	/*****************************************************************************/
		847
		848	void inline_speed
		849	fd_intern (int fd)
		850	{
		851	#ifdef _WIN32
		852	int arg = 1;
		853	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		854	#else
		855	fcntl (fd, F_SETFD, FD_CLOEXEC);
		856	fcntl (fd, F_SETFL, O_NONBLOCK);
		857	#endif
		858	}
		859
		860	static void noinline
		861	evpipe_init (EV_P)
		862	{
		863	if (!ev_is_active (&pipeev))
		864	{
		865	#if EV_USE_EVENTFD
		866	if ((evfd = eventfd (0, 0)) >= 0)
		867	{
		868	evpipe [0] = -1;
		869	fd_intern (evfd);
		870	ev_io_set (&pipeev, evfd, EV_READ);
		871	}
		872	else
		873	#endif
		874	{
		875	while (pipe (evpipe))
		876	syserr ("(libev) error creating signal/async pipe");
		877
		878	fd_intern (evpipe [0]);
		879	fd_intern (evpipe [1]);
		880	ev_io_set (&pipeev, evpipe [0], EV_READ);
		881	}
		882
		883	ev_io_start (EV_A_ &pipeev);
		884	ev_unref (EV_A); /* watcher should not keep loop alive */
		885	}
		886	}
		887
		888	void inline_size
		889	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		890	{
		891	if (!*flag)
		892	{
		893	int old_errno = errno; /* save errno because write might clobber it */
		894
		895	*flag = 1;
		896
		897	#if EV_USE_EVENTFD
		898	if (evfd >= 0)
		899	{
		900	uint64_t counter = 1;
		901	write (evfd, &counter, sizeof (uint64_t));
		902	}
		903	else
		904	#endif
		905	write (evpipe [1], &old_errno, 1);
		906
		907	errno = old_errno;
		908	}
		909	}
		910
472	static void	911	static void
		912	pipecb (EV_P_ ev_io *iow, int revents)
		913	{
		914	#if EV_USE_EVENTFD
		915	if (evfd >= 0)
		916	{
		917	uint64_t counter = 1;
		918	read (evfd, &counter, sizeof (uint64_t));
		919	}
		920	else
		921	#endif
		922	{
		923	char dummy;
		924	read (evpipe [0], &dummy, 1);
		925	}
		926
		927	if (gotsig && ev_is_default_loop (EV_A))
		928	{
		929	int signum;
		930	gotsig = 0;
		931
		932	for (signum = signalmax; signum--; )
		933	if (signals [signum].gotsig)
		934	ev_feed_signal_event (EV_A_ signum + 1);
		935	}
		936
		937	#if EV_ASYNC_ENABLE
		938	if (gotasync)
		939	{
		940	int i;
		941	gotasync = 0;
		942
		943	for (i = asynccnt; i--; )
		944	if (asyncs [i]->sent)
		945	{
		946	asyncs [i]->sent = 0;
		947	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		948	}
		949	}
		950	#endif
		951	}
		952
		953	/*****************************************************************************/
		954
		955	static void
473	sighandler (int signum)	956	ev_sighandler (int signum)
474	{	957	{
		958	#if EV_MULTIPLICITY
		959	struct ev_loop *loop = &default_loop_struct;
		960	#endif
		961
475	#if WIN32	962	#if _WIN32
476	signal (signum, sighandler);	963	signal (signum, ev_sighandler);
477	#endif	964	#endif
478		965
479	signals [signum - 1].gotsig = 1;	966	signals [signum - 1].gotsig = 1;
480		967	evpipe_write (EV_A_ &gotsig);
481	if (!gotsig)
482	{
483	int old_errno = errno;
484	gotsig = 1;
485	write (sigpipe [1], &signum, 1);
486	errno = old_errno;
487	}
488	}	968	}
489		969
490	static void	970	void noinline
491	sigcb (EV_P_ struct ev_io *iow, int revents)	971	ev_feed_signal_event (EV_P_ int signum)
492	{	972	{
493	struct ev_watcher_list *w;	973	WL w;
		974
		975	#if EV_MULTIPLICITY
		976	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		977	#endif
		978
494	int signum;	979	--signum;
495		980
496	read (sigpipe [0], &revents, 1);	981	if (signum < 0 || signum >= signalmax)
497	gotsig = 0;	982	return;
498		983
499	for (signum = signalmax; signum--; )
500	if (signals [signum].gotsig)
501	{
502	signals [signum].gotsig = 0;	984	signals [signum].gotsig = 0;
503		985
504	for (w = signals [signum].head; w; w = w->next)	986	for (w = signals [signum].head; w; w = w->next)
505	event (EV_A_ (W)w, EV_SIGNAL);	987	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
506	}
507	}
508
509	static void
510	siginit (EV_P)
511	{
512	#ifndef WIN32
513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
515
516	/* rather than sort out wether we really need nb, set it */
517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
519	#endif
520
521	ev_io_set (&sigev, sigpipe [0], EV_READ);
522	ev_io_start (EV_A_ &sigev);
523	ev_unref (EV_A); /* child watcher should not keep loop alive */
524	}	988	}
525		989
526	/*****************************************************************************/	990	/*****************************************************************************/
527		991
		992	static WL childs [EV_PID_HASHSIZE];
		993
528	#ifndef WIN32	994	#ifndef _WIN32
529		995
530	static struct ev_child *childs [PID_HASHSIZE];
531	static struct ev_signal childev;	996	static ev_signal childev;
		997
		998	#ifndef WIFCONTINUED
		999	# define WIFCONTINUED(status) 0
		1000	#endif
		1001
		1002	void inline_speed
		1003	child_reap (EV_P_ int chain, int pid, int status)
		1004	{
		1005	ev_child *w;
		1006	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1007
		1008	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1009	{
		1010	if ((w->pid == pid || !w->pid)
		1011	&& (!traced || (w->flags & 1)))
		1012	{
		1013	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1014	w->rpid = pid;
		1015	w->rstatus = status;
		1016	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1017	}
		1018	}
		1019	}
532		1020
533	#ifndef WCONTINUED	1021	#ifndef WCONTINUED
534	# define WCONTINUED 0	1022	# define WCONTINUED 0
535	#endif	1023	#endif
536		1024
537	static void	1025	static void
538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
539	{
540	struct ev_child *w;
541
542	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
543	if (w->pid == pid || !w->pid)
544	{
545	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
546	w->rpid = pid;
547	w->rstatus = status;
548	event (EV_A_ (W)w, EV_CHILD);
549	}
550	}
551
552	static void
553	childcb (EV_P_ struct ev_signal *sw, int revents)	1026	childcb (EV_P_ ev_signal *sw, int revents)
554	{	1027	{
555	int pid, status;	1028	int pid, status;
556		1029
		1030	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
557	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1031	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
558	{	1032	if (!WCONTINUED
		1033	|| errno != EINVAL
		1034	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1035	return;
		1036
559	/* make sure we are called again until all childs have been reaped */	1037	/* make sure we are called again until all children have been reaped */
		1038	/* we need to do it this way so that the callback gets called before we continue */
560	event (EV_A_ (W)sw, EV_SIGNAL);	1039	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
561		1040
562	child_reap (EV_A_ sw, pid, pid, status);	1041	child_reap (EV_A_ pid, pid, status);
		1042	if (EV_PID_HASHSIZE > 1)
563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1043	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
564	}
565	}	1044	}
566		1045
567	#endif	1046	#endif
568		1047
569	/*****************************************************************************/	1048	/*****************************************************************************/
570		1049
		1050	#if EV_USE_PORT
		1051	# include "ev_port.c"
		1052	#endif
571	#if EV_USE_KQUEUE	1053	#if EV_USE_KQUEUE
572	# include "ev_kqueue.c"	1054	# include "ev_kqueue.c"
573	#endif	1055	#endif
574	#if EV_USE_EPOLL	1056	#if EV_USE_EPOLL
575	# include "ev_epoll.c"	1057	# include "ev_epoll.c"
…		…
592	{	1074	{
593	return EV_VERSION_MINOR;	1075	return EV_VERSION_MINOR;
594	}	1076	}
595		1077
596	/* return true if we are running with elevated privileges and should ignore env variables */	1078	/* return true if we are running with elevated privileges and should ignore env variables */
597	static int	1079	int inline_size
598	enable_secure (void)	1080	enable_secure (void)
599	{	1081	{
600	#ifdef WIN32	1082	#ifdef _WIN32
601	return 0;	1083	return 0;
602	#else	1084	#else
603	return getuid () != geteuid ()	1085	return getuid () != geteuid ()
604	|| getgid () != getegid ();	1086	|| getgid () != getegid ();
605	#endif	1087	#endif
606	}	1088	}
607		1089
608	int	1090	unsigned int
609	ev_method (EV_P)	1091	ev_supported_backends (void)
610	{	1092	{
611	return method;	1093	unsigned int flags = 0;
612	}
613		1094
614	static void	1095	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
615	loop_init (EV_P_ int methods)	1096	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1097	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1098	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1099	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1100
		1101	return flags;
		1102	}
		1103
		1104	unsigned int
		1105	ev_recommended_backends (void)
616	{	1106	{
617	if (!method)	1107	unsigned int flags = ev_supported_backends ();
		1108
		1109	#ifndef __NetBSD__
		1110	/* kqueue is borked on everything but netbsd apparently */
		1111	/* it usually doesn't work correctly on anything but sockets and pipes */
		1112	flags &= ~EVBACKEND_KQUEUE;
		1113	#endif
		1114	#ifdef __APPLE__
		1115	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1116	flags &= ~EVBACKEND_POLL;
		1117	#endif
		1118
		1119	return flags;
		1120	}
		1121
		1122	unsigned int
		1123	ev_embeddable_backends (void)
		1124	{
		1125	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1126
		1127	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1128	/* please fix it and tell me how to detect the fix */
		1129	flags &= ~EVBACKEND_EPOLL;
		1130
		1131	return flags;
		1132	}
		1133
		1134	unsigned int
		1135	ev_backend (EV_P)
		1136	{
		1137	return backend;
		1138	}
		1139
		1140	unsigned int
		1141	ev_loop_count (EV_P)
		1142	{
		1143	return loop_count;
		1144	}
		1145
		1146	void
		1147	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1148	{
		1149	io_blocktime = interval;
		1150	}
		1151
		1152	void
		1153	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1154	{
		1155	timeout_blocktime = interval;
		1156	}
		1157
		1158	static void noinline
		1159	loop_init (EV_P_ unsigned int flags)
		1160	{
		1161	if (!backend)
618	{	1162	{
619	#if EV_USE_MONOTONIC	1163	#if EV_USE_MONOTONIC
620	{	1164	{
621	struct timespec ts;	1165	struct timespec ts;
622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1166	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
623	have_monotonic = 1;	1167	have_monotonic = 1;
624	}	1168	}
625	#endif	1169	#endif
626		1170
627	rt_now = ev_time ();	1171	ev_rt_now = ev_time ();
628	mn_now = get_clock ();	1172	mn_now = get_clock ();
629	now_floor = mn_now;	1173	now_floor = mn_now;
630	rtmn_diff = rt_now - mn_now;	1174	rtmn_diff = ev_rt_now - mn_now;
631		1175
632	if (methods == EVMETHOD_AUTO)	1176	io_blocktime = 0.;
633	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1177	timeout_blocktime = 0.;
		1178	backend = 0;
		1179	backend_fd = -1;
		1180	gotasync = 0;
		1181	#if EV_USE_INOTIFY
		1182	fs_fd = -2;
		1183	#endif
		1184
		1185	/* pid check not overridable via env */
		1186	#ifndef _WIN32
		1187	if (flags & EVFLAG_FORKCHECK)
		1188	curpid = getpid ();
		1189	#endif
		1190
		1191	if (!(flags & EVFLAG_NOENV)
		1192	&& !enable_secure ()
		1193	&& getenv ("LIBEV_FLAGS"))
634	methods = atoi (getenv ("LIBEV_METHODS"));	1194	flags = atoi (getenv ("LIBEV_FLAGS"));
635	else
636	methods = EVMETHOD_ANY;
637		1195
638	method = 0;	1196	if (!(flags & 0x0000ffffU))
639	#if EV_USE_WIN32	1197	flags |= ev_recommended_backends ();
640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	1198
		1199	#if EV_USE_PORT
		1200	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
641	#endif	1201	#endif
642	#if EV_USE_KQUEUE	1202	#if EV_USE_KQUEUE
643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1203	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
644	#endif	1204	#endif
645	#if EV_USE_EPOLL	1205	#if EV_USE_EPOLL
646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1206	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
647	#endif	1207	#endif
648	#if EV_USE_POLL	1208	#if EV_USE_POLL
649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1209	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
650	#endif	1210	#endif
651	#if EV_USE_SELECT	1211	#if EV_USE_SELECT
652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1212	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
653	#endif	1213	#endif
654	}
655	}
656		1214
657	void	1215	ev_init (&pipeev, pipecb);
		1216	ev_set_priority (&pipeev, EV_MAXPRI);
		1217	}
		1218	}
		1219
		1220	static void noinline
658	loop_destroy (EV_P)	1221	loop_destroy (EV_P)
659	{	1222	{
660	int i;	1223	int i;
661		1224
		1225	if (ev_is_active (&pipeev))
		1226	{
		1227	ev_ref (EV_A); /* signal watcher */
		1228	ev_io_stop (EV_A_ &pipeev);
		1229
		1230	#if EV_USE_EVENTFD
		1231	if (evfd >= 0)
		1232	close (evfd);
		1233	#endif
		1234
		1235	if (evpipe [0] >= 0)
		1236	{
		1237	close (evpipe [0]);
		1238	close (evpipe [1]);
		1239	}
		1240	}
		1241
662	#if EV_USE_WIN32	1242	#if EV_USE_INOTIFY
663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	1243	if (fs_fd >= 0)
		1244	close (fs_fd);
		1245	#endif
		1246
		1247	if (backend_fd >= 0)
		1248	close (backend_fd);
		1249
		1250	#if EV_USE_PORT
		1251	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
664	#endif	1252	#endif
665	#if EV_USE_KQUEUE	1253	#if EV_USE_KQUEUE
666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1254	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
667	#endif	1255	#endif
668	#if EV_USE_EPOLL	1256	#if EV_USE_EPOLL
669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1257	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
670	#endif	1258	#endif
671	#if EV_USE_POLL	1259	#if EV_USE_POLL
672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1260	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
673	#endif	1261	#endif
674	#if EV_USE_SELECT	1262	#if EV_USE_SELECT
675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1263	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
676	#endif	1264	#endif
677		1265
678	for (i = NUMPRI; i--; )	1266	for (i = NUMPRI; i--; )
		1267	{
679	array_free (pending, [i]);	1268	array_free (pending, [i]);
		1269	#if EV_IDLE_ENABLE
		1270	array_free (idle, [i]);
		1271	#endif
		1272	}
680		1273
		1274	ev_free (anfds); anfdmax = 0;
		1275
		1276	/* have to use the microsoft-never-gets-it-right macro */
681	array_free (fdchange, );	1277	array_free (fdchange, EMPTY);
682	array_free (timer, );	1278	array_free (timer, EMPTY);
		1279	#if EV_PERIODIC_ENABLE
683	array_free (periodic, );	1280	array_free (periodic, EMPTY);
684	array_free (idle, );	1281	#endif
		1282	#if EV_FORK_ENABLE
		1283	array_free (fork, EMPTY);
		1284	#endif
685	array_free (prepare, );	1285	array_free (prepare, EMPTY);
686	array_free (check, );	1286	array_free (check, EMPTY);
		1287	#if EV_ASYNC_ENABLE
		1288	array_free (async, EMPTY);
		1289	#endif
687		1290
688	method = 0;	1291	backend = 0;
689	/*TODO*/
690	}	1292	}
691		1293
692	void	1294	#if EV_USE_INOTIFY
		1295	void inline_size infy_fork (EV_P);
		1296	#endif
		1297
		1298	void inline_size
693	loop_fork (EV_P)	1299	loop_fork (EV_P)
694	{	1300	{
695	/*TODO*/	1301	#if EV_USE_PORT
		1302	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1303	#endif
		1304	#if EV_USE_KQUEUE
		1305	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1306	#endif
696	#if EV_USE_EPOLL	1307	#if EV_USE_EPOLL
697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1308	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
698	#endif	1309	#endif
699	#if EV_USE_KQUEUE	1310	#if EV_USE_INOTIFY
700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1311	infy_fork (EV_A);
701	#endif	1312	#endif
		1313
		1314	if (ev_is_active (&pipeev))
		1315	{
		1316	/* this "locks" the handlers against writing to the pipe */
		1317	/* while we modify the fd vars */
		1318	gotsig = 1;
		1319	#if EV_ASYNC_ENABLE
		1320	gotasync = 1;
		1321	#endif
		1322
		1323	ev_ref (EV_A);
		1324	ev_io_stop (EV_A_ &pipeev);
		1325
		1326	#if EV_USE_EVENTFD
		1327	if (evfd >= 0)
		1328	close (evfd);
		1329	#endif
		1330
		1331	if (evpipe [0] >= 0)
		1332	{
		1333	close (evpipe [0]);
		1334	close (evpipe [1]);
		1335	}
		1336
		1337	evpipe_init (EV_A);
		1338	/* now iterate over everything, in case we missed something */
		1339	pipecb (EV_A_ &pipeev, EV_READ);
		1340	}
		1341
		1342	postfork = 0;
702	}	1343	}
703		1344
704	#if EV_MULTIPLICITY	1345	#if EV_MULTIPLICITY
705	struct ev_loop *	1346	struct ev_loop *
706	ev_loop_new (int methods)	1347	ev_loop_new (unsigned int flags)
707	{	1348	{
708	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));	1349	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
709		1350
		1351	memset (loop, 0, sizeof (struct ev_loop));
		1352
710	loop_init (EV_A_ methods);	1353	loop_init (EV_A_ flags);
711		1354
712	if (ev_method (EV_A))	1355	if (ev_backend (EV_A))
713	return loop;	1356	return loop;
714		1357
715	return 0;	1358	return 0;
716	}	1359	}
717		1360
718	void	1361	void
719	ev_loop_destroy (EV_P)	1362	ev_loop_destroy (EV_P)
720	{	1363	{
721	loop_destroy (EV_A);	1364	loop_destroy (EV_A);
722	free (loop);	1365	ev_free (loop);
723	}	1366	}
724		1367
725	void	1368	void
726	ev_loop_fork (EV_P)	1369	ev_loop_fork (EV_P)
727	{	1370	{
728	loop_fork (EV_A);	1371	postfork = 1; /* must be in line with ev_default_fork */
729	}	1372	}
730		1373
731	#endif	1374	#endif
732		1375
733	#if EV_MULTIPLICITY	1376	#if EV_MULTIPLICITY
734	struct ev_loop default_loop_struct;
735	static struct ev_loop *default_loop;
736
737	struct ev_loop *	1377	struct ev_loop *
		1378	ev_default_loop_init (unsigned int flags)
738	#else	1379	#else
739	static int default_loop;
740
741	int	1380	int
		1381	ev_default_loop (unsigned int flags)
742	#endif	1382	#endif
743	ev_default_loop (int methods)
744	{	1383	{
745	if (sigpipe [0] == sigpipe [1])
746	if (pipe (sigpipe))
747	return 0;
748
749	if (!default_loop)	1384	if (!ev_default_loop_ptr)
750	{	1385	{
751	#if EV_MULTIPLICITY	1386	#if EV_MULTIPLICITY
752	struct ev_loop *loop = default_loop = &default_loop_struct;	1387	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
753	#else	1388	#else
754	default_loop = 1;	1389	ev_default_loop_ptr = 1;
755	#endif	1390	#endif
756		1391
757	loop_init (EV_A_ methods);	1392	loop_init (EV_A_ flags);
758		1393
759	if (ev_method (EV_A))	1394	if (ev_backend (EV_A))
760	{	1395	{
761	ev_watcher_init (&sigev, sigcb);
762	ev_set_priority (&sigev, EV_MAXPRI);
763	siginit (EV_A);
764
765	#ifndef WIN32	1396	#ifndef _WIN32
766	ev_signal_init (&childev, childcb, SIGCHLD);	1397	ev_signal_init (&childev, childcb, SIGCHLD);
767	ev_set_priority (&childev, EV_MAXPRI);	1398	ev_set_priority (&childev, EV_MAXPRI);
768	ev_signal_start (EV_A_ &childev);	1399	ev_signal_start (EV_A_ &childev);
769	ev_unref (EV_A); /* child watcher should not keep loop alive */	1400	ev_unref (EV_A); /* child watcher should not keep loop alive */
770	#endif	1401	#endif
771	}	1402	}
772	else	1403	else
773	default_loop = 0;	1404	ev_default_loop_ptr = 0;
774	}	1405	}
775		1406
776	return default_loop;	1407	return ev_default_loop_ptr;
777	}	1408	}
778		1409
779	void	1410	void
780	ev_default_destroy (void)	1411	ev_default_destroy (void)
781	{	1412	{
782	#if EV_MULTIPLICITY	1413	#if EV_MULTIPLICITY
783	struct ev_loop *loop = default_loop;	1414	struct ev_loop *loop = ev_default_loop_ptr;
784	#endif	1415	#endif
785		1416
		1417	#ifndef _WIN32
786	ev_ref (EV_A); /* child watcher */	1418	ev_ref (EV_A); /* child watcher */
787	ev_signal_stop (EV_A_ &childev);	1419	ev_signal_stop (EV_A_ &childev);
788		1420	#endif
789	ev_ref (EV_A); /* signal watcher */
790	ev_io_stop (EV_A_ &sigev);
791
792	close (sigpipe [0]); sigpipe [0] = 0;
793	close (sigpipe [1]); sigpipe [1] = 0;
794		1421
795	loop_destroy (EV_A);	1422	loop_destroy (EV_A);
796	}	1423	}
797		1424
798	void	1425	void
799	ev_default_fork (void)	1426	ev_default_fork (void)
800	{	1427	{
801	#if EV_MULTIPLICITY	1428	#if EV_MULTIPLICITY
802	struct ev_loop *loop = default_loop;	1429	struct ev_loop *loop = ev_default_loop_ptr;
803	#endif	1430	#endif
804		1431
805	loop_fork (EV_A);	1432	if (backend)
806		1433	postfork = 1; /* must be in line with ev_loop_fork */
807	ev_io_stop (EV_A_ &sigev);
808	close (sigpipe [0]);
809	close (sigpipe [1]);
810	pipe (sigpipe);
811
812	ev_ref (EV_A); /* signal watcher */
813	siginit (EV_A);
814	}	1434	}
815		1435
816	/*****************************************************************************/	1436	/*****************************************************************************/
817		1437
818	static void	1438	void
		1439	ev_invoke (EV_P_ void *w, int revents)
		1440	{
		1441	EV_CB_INVOKE ((W)w, revents);
		1442	}
		1443
		1444	void inline_speed
819	call_pending (EV_P)	1445	call_pending (EV_P)
820	{	1446	{
821	int pri;	1447	int pri;
822		1448
823	for (pri = NUMPRI; pri--; )	1449	for (pri = NUMPRI; pri--; )
824	while (pendingcnt [pri])	1450	while (pendingcnt [pri])
825	{	1451	{
826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1452	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
827		1453
828	if (p->w)	1454	if (expect_true (p->w))
829	{	1455	{
		1456	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1457
830	p->w->pending = 0;	1458	p->w->pending = 0;
831	p->w->cb (EV_A_ p->w, p->events);	1459	EV_CB_INVOKE (p->w, p->events);
832	}	1460	}
833	}	1461	}
834	}	1462	}
835		1463
836	static void	1464	void inline_size
837	timers_reify (EV_P)	1465	timers_reify (EV_P)
838	{	1466	{
839	while (timercnt && ((WT)timers [0])->at <= mn_now)	1467	while (timercnt && ev_at (timers [1]) <= mn_now)
840	{	1468	{
841	struct ev_timer *w = timers [0];	1469	ev_timer *w = (ev_timer *)timers [1];
842		1470
843	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1471	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
844		1472
845	/* first reschedule or stop timer */	1473	/* first reschedule or stop timer */
846	if (w->repeat)	1474	if (w->repeat)
847	{	1475	{
848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1476	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
849	((WT)w)->at = mn_now + w->repeat;	1477
		1478	ev_at (w) += w->repeat;
		1479	if (ev_at (w) < mn_now)
		1480	ev_at (w) = mn_now;
		1481
850	downheap ((WT *)timers, timercnt, 0);	1482	downheap (timers, timercnt, 1);
851	}	1483	}
852	else	1484	else
853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1485	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
854		1486
855	event (EV_A_ (W)w, EV_TIMEOUT);	1487	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
856	}	1488	}
857	}	1489	}
858		1490
859	static void	1491	#if EV_PERIODIC_ENABLE
		1492	void inline_size
860	periodics_reify (EV_P)	1493	periodics_reify (EV_P)
861	{	1494	{
862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1495	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
863	{	1496	{
864	struct ev_periodic *w = periodics [0];	1497	ev_periodic *w = (ev_periodic *)periodics [1];
865		1498
866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1499	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
867		1500
868	/* first reschedule or stop timer */	1501	/* first reschedule or stop timer */
869	if (w->interval)	1502	if (w->reschedule_cb)
870	{	1503	{
871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1504	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1505	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
873	downheap ((WT *)periodics, periodiccnt, 0);	1506	downheap (periodics, periodiccnt, 1);
		1507	}
		1508	else if (w->interval)
		1509	{
		1510	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1511	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1512	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1513	downheap (periodics, periodiccnt, 1);
874	}	1514	}
875	else	1515	else
876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1516	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
877		1517
878	event (EV_A_ (W)w, EV_PERIODIC);	1518	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
879	}	1519	}
880	}	1520	}
881		1521
882	static void	1522	static void noinline
883	periodics_reschedule (EV_P)	1523	periodics_reschedule (EV_P)
884	{	1524	{
885	int i;	1525	int i;
886		1526
887	/* adjust periodics after time jump */	1527	/* adjust periodics after time jump */
888	for (i = 0; i < periodiccnt; ++i)	1528	for (i = 0; i < periodiccnt; ++i)
889	{	1529	{
890	struct ev_periodic *w = periodics [i];	1530	ev_periodic *w = (ev_periodic *)periodics [i];
891		1531
		1532	if (w->reschedule_cb)
		1533	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
892	if (w->interval)	1534	else if (w->interval)
		1535	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1536	}
		1537
		1538	/* now rebuild the heap */
		1539	for (i = periodiccnt >> 1; i--; )
		1540	downheap (periodics, periodiccnt, i);
		1541	}
		1542	#endif
		1543
		1544	#if EV_IDLE_ENABLE
		1545	void inline_size
		1546	idle_reify (EV_P)
		1547	{
		1548	if (expect_false (idleall))
		1549	{
		1550	int pri;
		1551
		1552	for (pri = NUMPRI; pri--; )
893	{	1553	{
894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1554	if (pendingcnt [pri])
		1555	break;
895		1556
896	if (fabs (diff) >= 1e-4)	1557	if (idlecnt [pri])
897	{	1558	{
898	ev_periodic_stop (EV_A_ w);	1559	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
899	ev_periodic_start (EV_A_ w);	1560	break;
900
901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
902	}	1561	}
903	}	1562	}
904	}	1563	}
905	}	1564	}
		1565	#endif
906		1566
907	inline int	1567	void inline_speed
908	time_update_monotonic (EV_P)	1568	time_update (EV_P_ ev_tstamp max_block)
909	{
910	mn_now = get_clock ();
911
912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
913	{
914	rt_now = rtmn_diff + mn_now;
915	return 0;
916	}
917	else
918	{
919	now_floor = mn_now;
920	rt_now = ev_time ();
921	return 1;
922	}
923	}
924
925	static void
926	time_update (EV_P)
927	{	1569	{
928	int i;	1570	int i;
929		1571
930	#if EV_USE_MONOTONIC	1572	#if EV_USE_MONOTONIC
931	if (expect_true (have_monotonic))	1573	if (expect_true (have_monotonic))
932	{	1574	{
933	if (time_update_monotonic (EV_A))	1575	ev_tstamp odiff = rtmn_diff;
		1576
		1577	mn_now = get_clock ();
		1578
		1579	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1580	/* interpolate in the meantime */
		1581	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
934	{	1582	{
935	ev_tstamp odiff = rtmn_diff;	1583	ev_rt_now = rtmn_diff + mn_now;
		1584	return;
		1585	}
936		1586
		1587	now_floor = mn_now;
		1588	ev_rt_now = ev_time ();
		1589
937	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1590	/* loop a few times, before making important decisions.
		1591	* on the choice of "4": one iteration isn't enough,
		1592	* in case we get preempted during the calls to
		1593	* ev_time and get_clock. a second call is almost guaranteed
		1594	* to succeed in that case, though. and looping a few more times
		1595	* doesn't hurt either as we only do this on time-jumps or
		1596	* in the unlikely event of having been preempted here.
		1597	*/
		1598	for (i = 4; --i; )
938	{	1599	{
939	rtmn_diff = rt_now - mn_now;	1600	rtmn_diff = ev_rt_now - mn_now;
940		1601
941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1602	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
942	return; /* all is well */	1603	return; /* all is well */
943		1604
944	rt_now = ev_time ();	1605	ev_rt_now = ev_time ();
945	mn_now = get_clock ();	1606	mn_now = get_clock ();
946	now_floor = mn_now;	1607	now_floor = mn_now;
947	}	1608	}
948		1609
		1610	# if EV_PERIODIC_ENABLE
		1611	periodics_reschedule (EV_A);
		1612	# endif
		1613	/* no timer adjustment, as the monotonic clock doesn't jump */
		1614	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1615	}
		1616	else
		1617	#endif
		1618	{
		1619	ev_rt_now = ev_time ();
		1620
		1621	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1622	{
		1623	#if EV_PERIODIC_ENABLE
949	periodics_reschedule (EV_A);	1624	periodics_reschedule (EV_A);
950	/* no timer adjustment, as the monotonic clock doesn't jump */	1625	#endif
951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1626	/* adjust timers. this is easy, as the offset is the same for all of them */
		1627	for (i = 1; i <= timercnt; ++i)
		1628	ev_at (timers [i]) += ev_rt_now - mn_now;
952	}	1629	}
953	}
954	else
955	#endif
956	{
957	rt_now = ev_time ();
958		1630
959	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
960	{
961	periodics_reschedule (EV_A);
962
963	/* adjust timers. this is easy, as the offset is the same for all */
964	for (i = 0; i < timercnt; ++i)
965	((WT)timers [i])->at += rt_now - mn_now;
966	}
967
968	mn_now = rt_now;	1631	mn_now = ev_rt_now;
969	}	1632	}
970	}	1633	}
971		1634
972	void	1635	void
973	ev_ref (EV_P)	1636	ev_ref (EV_P)
…		…
984	static int loop_done;	1647	static int loop_done;
985		1648
986	void	1649	void
987	ev_loop (EV_P_ int flags)	1650	ev_loop (EV_P_ int flags)
988	{	1651	{
989	double block;	1652	loop_done = EVUNLOOP_CANCEL;
990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1653
		1654	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
991		1655
992	do	1656	do
993	{	1657	{
		1658	#ifndef _WIN32
		1659	if (expect_false (curpid)) /* penalise the forking check even more */
		1660	if (expect_false (getpid () != curpid))
		1661	{
		1662	curpid = getpid ();
		1663	postfork = 1;
		1664	}
		1665	#endif
		1666
		1667	#if EV_FORK_ENABLE
		1668	/* we might have forked, so queue fork handlers */
		1669	if (expect_false (postfork))
		1670	if (forkcnt)
		1671	{
		1672	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1673	call_pending (EV_A);
		1674	}
		1675	#endif
		1676
994	/* queue check watchers (and execute them) */	1677	/* queue prepare watchers (and execute them) */
995	if (expect_false (preparecnt))	1678	if (expect_false (preparecnt))
996	{	1679	{
997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1680	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
998	call_pending (EV_A);	1681	call_pending (EV_A);
999	}	1682	}
1000		1683
		1684	if (expect_false (!activecnt))
		1685	break;
		1686
		1687	/* we might have forked, so reify kernel state if necessary */
		1688	if (expect_false (postfork))
		1689	loop_fork (EV_A);
		1690
1001	/* update fd-related kernel structures */	1691	/* update fd-related kernel structures */
1002	fd_reify (EV_A);	1692	fd_reify (EV_A);
1003		1693
1004	/* calculate blocking time */	1694	/* calculate blocking time */
		1695	{
		1696	ev_tstamp waittime = 0.;
		1697	ev_tstamp sleeptime = 0.;
1005		1698
1006	/* we only need this for !monotonic clockor timers, but as we basically	1699	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1007	always have timers, we just calculate it always */
1008	#if EV_USE_MONOTONIC
1009	if (expect_true (have_monotonic))
1010	time_update_monotonic (EV_A);
1011	else
1012	#endif
1013	{	1700	{
1014	rt_now = ev_time ();	1701	/* update time to cancel out callback processing overhead */
1015	mn_now = rt_now;	1702	time_update (EV_A_ 1e100);
1016	}
1017		1703
1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
1019	block = 0.;
1020	else
1021	{
1022	block = MAX_BLOCKTIME;	1704	waittime = MAX_BLOCKTIME;
1023		1705
1024	if (timercnt)	1706	if (timercnt)
1025	{	1707	{
1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1708	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
1027	if (block > to) block = to;	1709	if (waittime > to) waittime = to;
1028	}	1710	}
1029		1711
		1712	#if EV_PERIODIC_ENABLE
1030	if (periodiccnt)	1713	if (periodiccnt)
1031	{	1714	{
1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1715	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1033	if (block > to) block = to;	1716	if (waittime > to) waittime = to;
1034	}	1717	}
		1718	#endif
1035		1719
1036	if (block < 0.) block = 0.;	1720	if (expect_false (waittime < timeout_blocktime))
		1721	waittime = timeout_blocktime;
		1722
		1723	sleeptime = waittime - backend_fudge;
		1724
		1725	if (expect_true (sleeptime > io_blocktime))
		1726	sleeptime = io_blocktime;
		1727
		1728	if (sleeptime)
		1729	{
		1730	ev_sleep (sleeptime);
		1731	waittime -= sleeptime;
		1732	}
1037	}	1733	}
1038		1734
1039	method_poll (EV_A_ block);	1735	++loop_count;
		1736	backend_poll (EV_A_ waittime);
1040		1737
1041	/* update rt_now, do magic */	1738	/* update ev_rt_now, do magic */
1042	time_update (EV_A);	1739	time_update (EV_A_ waittime + sleeptime);
		1740	}
1043		1741
1044	/* queue pending timers and reschedule them */	1742	/* queue pending timers and reschedule them */
1045	timers_reify (EV_A); /* relative timers called last */	1743	timers_reify (EV_A); /* relative timers called last */
		1744	#if EV_PERIODIC_ENABLE
1046	periodics_reify (EV_A); /* absolute timers called first */	1745	periodics_reify (EV_A); /* absolute timers called first */
		1746	#endif
1047		1747
		1748	#if EV_IDLE_ENABLE
1048	/* queue idle watchers unless io or timers are pending */	1749	/* queue idle watchers unless other events are pending */
1049	if (!pendingcnt)	1750	idle_reify (EV_A);
1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1751	#endif
1051		1752
1052	/* queue check watchers, to be executed first */	1753	/* queue check watchers, to be executed first */
1053	if (checkcnt)	1754	if (expect_false (checkcnt))
1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1755	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1055		1756
1056	call_pending (EV_A);	1757	call_pending (EV_A);
1057	}	1758	}
1058	while (activecnt && !loop_done);	1759	while (expect_true (
		1760	activecnt
		1761	&& !loop_done
		1762	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1763	));
1059		1764
1060	if (loop_done != 2)	1765	if (loop_done == EVUNLOOP_ONE)
1061	loop_done = 0;	1766	loop_done = EVUNLOOP_CANCEL;
1062	}	1767	}
1063		1768
1064	void	1769	void
1065	ev_unloop (EV_P_ int how)	1770	ev_unloop (EV_P_ int how)
1066	{	1771	{
1067	loop_done = how;	1772	loop_done = how;
1068	}	1773	}
1069		1774
1070	/*****************************************************************************/	1775	/*****************************************************************************/
1071		1776
1072	inline void	1777	void inline_size
1073	wlist_add (WL *head, WL elem)	1778	wlist_add (WL *head, WL elem)
1074	{	1779	{
1075	elem->next = *head;	1780	elem->next = *head;
1076	*head = elem;	1781	*head = elem;
1077	}	1782	}
1078		1783
1079	inline void	1784	void inline_size
1080	wlist_del (WL *head, WL elem)	1785	wlist_del (WL *head, WL elem)
1081	{	1786	{
1082	while (*head)	1787	while (*head)
1083	{	1788	{
1084	if (*head == elem)	1789	if (*head == elem)
…		…
1089		1794
1090	head = &(*head)->next;	1795	head = &(*head)->next;
1091	}	1796	}
1092	}	1797	}
1093		1798
1094	inline void	1799	void inline_speed
1095	ev_clear_pending (EV_P_ W w)	1800	clear_pending (EV_P_ W w)
1096	{	1801	{
1097	if (w->pending)	1802	if (w->pending)
1098	{	1803	{
1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1804	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1100	w->pending = 0;	1805	w->pending = 0;
1101	}	1806	}
1102	}	1807	}
1103		1808
1104	inline void	1809	int
		1810	ev_clear_pending (EV_P_ void *w)
		1811	{
		1812	W w_ = (W)w;
		1813	int pending = w_->pending;
		1814
		1815	if (expect_true (pending))
		1816	{
		1817	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1818	w_->pending = 0;
		1819	p->w = 0;
		1820	return p->events;
		1821	}
		1822	else
		1823	return 0;
		1824	}
		1825
		1826	void inline_size
		1827	pri_adjust (EV_P_ W w)
		1828	{
		1829	int pri = w->priority;
		1830	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1831	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1832	w->priority = pri;
		1833	}
		1834
		1835	void inline_speed
1105	ev_start (EV_P_ W w, int active)	1836	ev_start (EV_P_ W w, int active)
1106	{	1837	{
1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1838	pri_adjust (EV_A_ w);
1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1109
1110	w->active = active;	1839	w->active = active;
1111	ev_ref (EV_A);	1840	ev_ref (EV_A);
1112	}	1841	}
1113		1842
1114	inline void	1843	void inline_size
1115	ev_stop (EV_P_ W w)	1844	ev_stop (EV_P_ W w)
1116	{	1845	{
1117	ev_unref (EV_A);	1846	ev_unref (EV_A);
1118	w->active = 0;	1847	w->active = 0;
1119	}	1848	}
1120		1849
1121	/*****************************************************************************/	1850	/*****************************************************************************/
1122		1851
1123	void	1852	void noinline
1124	ev_io_start (EV_P_ struct ev_io *w)	1853	ev_io_start (EV_P_ ev_io *w)
1125	{	1854	{
1126	int fd = w->fd;	1855	int fd = w->fd;
1127		1856
1128	if (ev_is_active (w))	1857	if (expect_false (ev_is_active (w)))
1129	return;	1858	return;
1130		1859
1131	assert (("ev_io_start called with negative fd", fd >= 0));	1860	assert (("ev_io_start called with negative fd", fd >= 0));
1132		1861
1133	ev_start (EV_A_ (W)w, 1);	1862	ev_start (EV_A_ (W)w, 1);
1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1863	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1864	wlist_add (&anfds[fd].head, (WL)w);
1136		1865
1137	fd_change (EV_A_ fd);	1866	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1867	w->events &= ~EV_IOFDSET;
1138	}	1868	}
1139		1869
1140	void	1870	void noinline
1141	ev_io_stop (EV_P_ struct ev_io *w)	1871	ev_io_stop (EV_P_ ev_io *w)
1142	{	1872	{
1143	ev_clear_pending (EV_A_ (W)w);	1873	clear_pending (EV_A_ (W)w);
1144	if (!ev_is_active (w))	1874	if (expect_false (!ev_is_active (w)))
1145	return;	1875	return;
1146		1876
		1877	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1878
1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1879	wlist_del (&anfds[w->fd].head, (WL)w);
1148	ev_stop (EV_A_ (W)w);	1880	ev_stop (EV_A_ (W)w);
1149		1881
1150	fd_change (EV_A_ w->fd);	1882	fd_change (EV_A_ w->fd, 1);
1151	}	1883	}
1152		1884
1153	void	1885	void noinline
1154	ev_timer_start (EV_P_ struct ev_timer *w)	1886	ev_timer_start (EV_P_ ev_timer *w)
1155	{	1887	{
1156	if (ev_is_active (w))	1888	if (expect_false (ev_is_active (w)))
1157	return;	1889	return;
1158		1890
1159	((WT)w)->at += mn_now;	1891	ev_at (w) += mn_now;
1160		1892
1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1893	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1162		1894
1163	ev_start (EV_A_ (W)w, ++timercnt);	1895	ev_start (EV_A_ (W)w, ++timercnt);
1164	array_needsize (timers, timermax, timercnt, );	1896	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1165	timers [timercnt - 1] = w;	1897	timers [timercnt] = (WT)w;
1166	upheap ((WT *)timers, timercnt - 1);	1898	upheap (timers, timercnt);
1167		1899
1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1900	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1169	}	1901	}
1170		1902
1171	void	1903	void noinline
1172	ev_timer_stop (EV_P_ struct ev_timer *w)	1904	ev_timer_stop (EV_P_ ev_timer *w)
1173	{	1905	{
1174	ev_clear_pending (EV_A_ (W)w);	1906	clear_pending (EV_A_ (W)w);
1175	if (!ev_is_active (w))	1907	if (expect_false (!ev_is_active (w)))
1176	return;	1908	return;
1177		1909
		1910	{
		1911	int active = ev_active (w);
		1912
1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1913	assert (("internal timer heap corruption", timers [active] == (WT)w));
1179		1914
1180	if (((W)w)->active < timercnt--)	1915	if (expect_true (active < timercnt))
1181	{	1916	{
1182	timers [((W)w)->active - 1] = timers [timercnt];	1917	timers [active] = timers [timercnt];
1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1918	adjustheap (timers, timercnt, active);
1184	}	1919	}
1185		1920
1186	((WT)w)->at = w->repeat;	1921	--timercnt;
		1922	}
		1923
		1924	ev_at (w) -= mn_now;
1187		1925
1188	ev_stop (EV_A_ (W)w);	1926	ev_stop (EV_A_ (W)w);
1189	}	1927	}
1190		1928
1191	void	1929	void noinline
1192	ev_timer_again (EV_P_ struct ev_timer *w)	1930	ev_timer_again (EV_P_ ev_timer *w)
1193	{	1931	{
1194	if (ev_is_active (w))	1932	if (ev_is_active (w))
1195	{	1933	{
1196	if (w->repeat)	1934	if (w->repeat)
1197	{	1935	{
1198	((WT)w)->at = mn_now + w->repeat;	1936	ev_at (w) = mn_now + w->repeat;
1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1937	adjustheap (timers, timercnt, ev_active (w));
1200	}	1938	}
1201	else	1939	else
1202	ev_timer_stop (EV_A_ w);	1940	ev_timer_stop (EV_A_ w);
1203	}	1941	}
1204	else if (w->repeat)	1942	else if (w->repeat)
		1943	{
		1944	ev_at (w) = w->repeat;
1205	ev_timer_start (EV_A_ w);	1945	ev_timer_start (EV_A_ w);
		1946	}
1206	}	1947	}
1207		1948
1208	void	1949	#if EV_PERIODIC_ENABLE
		1950	void noinline
1209	ev_periodic_start (EV_P_ struct ev_periodic *w)	1951	ev_periodic_start (EV_P_ ev_periodic *w)
1210	{	1952	{
1211	if (ev_is_active (w))	1953	if (expect_false (ev_is_active (w)))
1212	return;	1954	return;
1213		1955
		1956	if (w->reschedule_cb)
		1957	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1958	else if (w->interval)
		1959	{
1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1960	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1215
1216	/* this formula differs from the one in periodic_reify because we do not always round up */	1961	/* this formula differs from the one in periodic_reify because we do not always round up */
1217	if (w->interval)
1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1962	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1963	}
		1964	else
		1965	ev_at (w) = w->offset;
1219		1966
1220	ev_start (EV_A_ (W)w, ++periodiccnt);	1967	ev_start (EV_A_ (W)w, ++periodiccnt);
1221	array_needsize (periodics, periodicmax, periodiccnt, );	1968	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1222	periodics [periodiccnt - 1] = w;	1969	periodics [periodiccnt] = (WT)w;
1223	upheap ((WT *)periodics, periodiccnt - 1);	1970	upheap (periodics, periodiccnt);
1224		1971
1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1972	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1226	}	1973	}
1227		1974
1228	void	1975	void noinline
1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1976	ev_periodic_stop (EV_P_ ev_periodic *w)
1230	{	1977	{
1231	ev_clear_pending (EV_A_ (W)w);	1978	clear_pending (EV_A_ (W)w);
1232	if (!ev_is_active (w))	1979	if (expect_false (!ev_is_active (w)))
1233	return;	1980	return;
1234		1981
		1982	{
		1983	int active = ev_active (w);
		1984
1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1985	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1236		1986
1237	if (((W)w)->active < periodiccnt--)	1987	if (expect_true (active < periodiccnt))
1238	{	1988	{
1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1989	periodics [active] = periodics [periodiccnt];
1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1990	adjustheap (periodics, periodiccnt, active);
1241	}	1991	}
		1992
		1993	--periodiccnt;
		1994	}
1242		1995
1243	ev_stop (EV_A_ (W)w);	1996	ev_stop (EV_A_ (W)w);
1244	}	1997	}
1245		1998
1246	void	1999	void noinline
1247	ev_idle_start (EV_P_ struct ev_idle *w)	2000	ev_periodic_again (EV_P_ ev_periodic *w)
1248	{	2001	{
1249	if (ev_is_active (w))	2002	/* TODO: use adjustheap and recalculation */
1250	return;
1251
1252	ev_start (EV_A_ (W)w, ++idlecnt);
1253	array_needsize (idles, idlemax, idlecnt, );
1254	idles [idlecnt - 1] = w;
1255	}
1256
1257	void
1258	ev_idle_stop (EV_P_ struct ev_idle *w)
1259	{
1260	ev_clear_pending (EV_A_ (W)w);
1261	if (ev_is_active (w))
1262	return;
1263
1264	idles [((W)w)->active - 1] = idles [--idlecnt];
1265	ev_stop (EV_A_ (W)w);	2003	ev_periodic_stop (EV_A_ w);
		2004	ev_periodic_start (EV_A_ w);
1266	}	2005	}
1267		2006	#endif
1268	void
1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
1270	{
1271	if (ev_is_active (w))
1272	return;
1273
1274	ev_start (EV_A_ (W)w, ++preparecnt);
1275	array_needsize (prepares, preparemax, preparecnt, );
1276	prepares [preparecnt - 1] = w;
1277	}
1278
1279	void
1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1281	{
1282	ev_clear_pending (EV_A_ (W)w);
1283	if (ev_is_active (w))
1284	return;
1285
1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1287	ev_stop (EV_A_ (W)w);
1288	}
1289
1290	void
1291	ev_check_start (EV_P_ struct ev_check *w)
1292	{
1293	if (ev_is_active (w))
1294	return;
1295
1296	ev_start (EV_A_ (W)w, ++checkcnt);
1297	array_needsize (checks, checkmax, checkcnt, );
1298	checks [checkcnt - 1] = w;
1299	}
1300
1301	void
1302	ev_check_stop (EV_P_ struct ev_check *w)
1303	{
1304	ev_clear_pending (EV_A_ (W)w);
1305	if (ev_is_active (w))
1306	return;
1307
1308	checks [((W)w)->active - 1] = checks [--checkcnt];
1309	ev_stop (EV_A_ (W)w);
1310	}
1311		2007
1312	#ifndef SA_RESTART	2008	#ifndef SA_RESTART
1313	# define SA_RESTART 0	2009	# define SA_RESTART 0
1314	#endif	2010	#endif
1315		2011
1316	void	2012	void noinline
1317	ev_signal_start (EV_P_ struct ev_signal *w)	2013	ev_signal_start (EV_P_ ev_signal *w)
1318	{	2014	{
1319	#if EV_MULTIPLICITY	2015	#if EV_MULTIPLICITY
1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2016	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1321	#endif	2017	#endif
1322	if (ev_is_active (w))	2018	if (expect_false (ev_is_active (w)))
1323	return;	2019	return;
1324		2020
1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2021	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1326		2022
		2023	evpipe_init (EV_A);
		2024
		2025	{
		2026	#ifndef _WIN32
		2027	sigset_t full, prev;
		2028	sigfillset (&full);
		2029	sigprocmask (SIG_SETMASK, &full, &prev);
		2030	#endif
		2031
		2032	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2033
		2034	#ifndef _WIN32
		2035	sigprocmask (SIG_SETMASK, &prev, 0);
		2036	#endif
		2037	}
		2038
1327	ev_start (EV_A_ (W)w, 1);	2039	ev_start (EV_A_ (W)w, 1);
1328	array_needsize (signals, signalmax, w->signum, signals_init);
1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2040	wlist_add (&signals [w->signum - 1].head, (WL)w);
1330		2041
1331	if (!((WL)w)->next)	2042	if (!((WL)w)->next)
1332	{	2043	{
1333	#if WIN32	2044	#if _WIN32
1334	signal (w->signum, sighandler);	2045	signal (w->signum, ev_sighandler);
1335	#else	2046	#else
1336	struct sigaction sa;	2047	struct sigaction sa;
1337	sa.sa_handler = sighandler;	2048	sa.sa_handler = ev_sighandler;
1338	sigfillset (&sa.sa_mask);	2049	sigfillset (&sa.sa_mask);
1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2050	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1340	sigaction (w->signum, &sa, 0);	2051	sigaction (w->signum, &sa, 0);
1341	#endif	2052	#endif
1342	}	2053	}
1343	}	2054	}
1344		2055
1345	void	2056	void noinline
1346	ev_signal_stop (EV_P_ struct ev_signal *w)	2057	ev_signal_stop (EV_P_ ev_signal *w)
1347	{	2058	{
1348	ev_clear_pending (EV_A_ (W)w);	2059	clear_pending (EV_A_ (W)w);
1349	if (!ev_is_active (w))	2060	if (expect_false (!ev_is_active (w)))
1350	return;	2061	return;
1351		2062
1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2063	wlist_del (&signals [w->signum - 1].head, (WL)w);
1353	ev_stop (EV_A_ (W)w);	2064	ev_stop (EV_A_ (W)w);
1354		2065
1355	if (!signals [w->signum - 1].head)	2066	if (!signals [w->signum - 1].head)
1356	signal (w->signum, SIG_DFL);	2067	signal (w->signum, SIG_DFL);
1357	}	2068	}
1358		2069
1359	void	2070	void
1360	ev_child_start (EV_P_ struct ev_child *w)	2071	ev_child_start (EV_P_ ev_child *w)
1361	{	2072	{
1362	#if EV_MULTIPLICITY	2073	#if EV_MULTIPLICITY
1363	assert (("child watchers are only supported in the default loop", loop == default_loop));	2074	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1364	#endif	2075	#endif
1365	if (ev_is_active (w))	2076	if (expect_false (ev_is_active (w)))
1366	return;	2077	return;
1367		2078
1368	ev_start (EV_A_ (W)w, 1);	2079	ev_start (EV_A_ (W)w, 1);
1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2080	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1370	}	2081	}
1371		2082
1372	void	2083	void
1373	ev_child_stop (EV_P_ struct ev_child *w)	2084	ev_child_stop (EV_P_ ev_child *w)
1374	{	2085	{
1375	ev_clear_pending (EV_A_ (W)w);	2086	clear_pending (EV_A_ (W)w);
1376	if (ev_is_active (w))	2087	if (expect_false (!ev_is_active (w)))
1377	return;	2088	return;
1378		2089
1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2090	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1380	ev_stop (EV_A_ (W)w);	2091	ev_stop (EV_A_ (W)w);
1381	}	2092	}
1382		2093
		2094	#if EV_STAT_ENABLE
		2095
		2096	# ifdef _WIN32
		2097	# undef lstat
		2098	# define lstat(a,b) _stati64 (a,b)
		2099	# endif
		2100
		2101	#define DEF_STAT_INTERVAL 5.0074891
		2102	#define MIN_STAT_INTERVAL 0.1074891
		2103
		2104	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2105
		2106	#if EV_USE_INOTIFY
		2107	# define EV_INOTIFY_BUFSIZE 8192
		2108
		2109	static void noinline
		2110	infy_add (EV_P_ ev_stat *w)
		2111	{
		2112	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2113
		2114	if (w->wd < 0)
		2115	{
		2116	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2117
		2118	/* monitor some parent directory for speedup hints */
		2119	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2120	{
		2121	char path [4096];
		2122	strcpy (path, w->path);
		2123
		2124	do
		2125	{
		2126	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2127	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2128
		2129	char *pend = strrchr (path, '/');
		2130
		2131	if (!pend)
		2132	break; /* whoops, no '/', complain to your admin */
		2133
		2134	*pend = 0;
		2135	w->wd = inotify_add_watch (fs_fd, path, mask);
		2136	}
		2137	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2138	}
		2139	}
		2140	else
		2141	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2142
		2143	if (w->wd >= 0)
		2144	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2145	}
		2146
		2147	static void noinline
		2148	infy_del (EV_P_ ev_stat *w)
		2149	{
		2150	int slot;
		2151	int wd = w->wd;
		2152
		2153	if (wd < 0)
		2154	return;
		2155
		2156	w->wd = -2;
		2157	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2158	wlist_del (&fs_hash [slot].head, (WL)w);
		2159
		2160	/* remove this watcher, if others are watching it, they will rearm */
		2161	inotify_rm_watch (fs_fd, wd);
		2162	}
		2163
		2164	static void noinline
		2165	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2166	{
		2167	if (slot < 0)
		2168	/* overflow, need to check for all hahs slots */
		2169	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2170	infy_wd (EV_A_ slot, wd, ev);
		2171	else
		2172	{
		2173	WL w_;
		2174
		2175	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2176	{
		2177	ev_stat *w = (ev_stat *)w_;
		2178	w_ = w_->next; /* lets us remove this watcher and all before it */
		2179
		2180	if (w->wd == wd || wd == -1)
		2181	{
		2182	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2183	{
		2184	w->wd = -1;
		2185	infy_add (EV_A_ w); /* re-add, no matter what */
		2186	}
		2187
		2188	stat_timer_cb (EV_A_ &w->timer, 0);
		2189	}
		2190	}
		2191	}
		2192	}
		2193
		2194	static void
		2195	infy_cb (EV_P_ ev_io *w, int revents)
		2196	{
		2197	char buf [EV_INOTIFY_BUFSIZE];
		2198	struct inotify_event *ev = (struct inotify_event *)buf;
		2199	int ofs;
		2200	int len = read (fs_fd, buf, sizeof (buf));
		2201
		2202	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2203	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2204	}
		2205
		2206	void inline_size
		2207	infy_init (EV_P)
		2208	{
		2209	if (fs_fd != -2)
		2210	return;
		2211
		2212	fs_fd = inotify_init ();
		2213
		2214	if (fs_fd >= 0)
		2215	{
		2216	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2217	ev_set_priority (&fs_w, EV_MAXPRI);
		2218	ev_io_start (EV_A_ &fs_w);
		2219	}
		2220	}
		2221
		2222	void inline_size
		2223	infy_fork (EV_P)
		2224	{
		2225	int slot;
		2226
		2227	if (fs_fd < 0)
		2228	return;
		2229
		2230	close (fs_fd);
		2231	fs_fd = inotify_init ();
		2232
		2233	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2234	{
		2235	WL w_ = fs_hash [slot].head;
		2236	fs_hash [slot].head = 0;
		2237
		2238	while (w_)
		2239	{
		2240	ev_stat *w = (ev_stat *)w_;
		2241	w_ = w_->next; /* lets us add this watcher */
		2242
		2243	w->wd = -1;
		2244
		2245	if (fs_fd >= 0)
		2246	infy_add (EV_A_ w); /* re-add, no matter what */
		2247	else
		2248	ev_timer_start (EV_A_ &w->timer);
		2249	}
		2250
		2251	}
		2252	}
		2253
		2254	#endif
		2255
		2256	void
		2257	ev_stat_stat (EV_P_ ev_stat *w)
		2258	{
		2259	if (lstat (w->path, &w->attr) < 0)
		2260	w->attr.st_nlink = 0;
		2261	else if (!w->attr.st_nlink)
		2262	w->attr.st_nlink = 1;
		2263	}
		2264
		2265	static void noinline
		2266	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2267	{
		2268	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2269
		2270	/* we copy this here each the time so that */
		2271	/* prev has the old value when the callback gets invoked */
		2272	w->prev = w->attr;
		2273	ev_stat_stat (EV_A_ w);
		2274
		2275	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2276	if (
		2277	w->prev.st_dev != w->attr.st_dev
		2278	|| w->prev.st_ino != w->attr.st_ino
		2279	|| w->prev.st_mode != w->attr.st_mode
		2280	|| w->prev.st_nlink != w->attr.st_nlink
		2281	|| w->prev.st_uid != w->attr.st_uid
		2282	|| w->prev.st_gid != w->attr.st_gid
		2283	|| w->prev.st_rdev != w->attr.st_rdev
		2284	|| w->prev.st_size != w->attr.st_size
		2285	|| w->prev.st_atime != w->attr.st_atime
		2286	|| w->prev.st_mtime != w->attr.st_mtime
		2287	|| w->prev.st_ctime != w->attr.st_ctime
		2288	) {
		2289	#if EV_USE_INOTIFY
		2290	infy_del (EV_A_ w);
		2291	infy_add (EV_A_ w);
		2292	ev_stat_stat (EV_A_ w); /* avoid race... */
		2293	#endif
		2294
		2295	ev_feed_event (EV_A_ w, EV_STAT);
		2296	}
		2297	}
		2298
		2299	void
		2300	ev_stat_start (EV_P_ ev_stat *w)
		2301	{
		2302	if (expect_false (ev_is_active (w)))
		2303	return;
		2304
		2305	/* since we use memcmp, we need to clear any padding data etc. */
		2306	memset (&w->prev, 0, sizeof (ev_statdata));
		2307	memset (&w->attr, 0, sizeof (ev_statdata));
		2308
		2309	ev_stat_stat (EV_A_ w);
		2310
		2311	if (w->interval < MIN_STAT_INTERVAL)
		2312	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2313
		2314	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2315	ev_set_priority (&w->timer, ev_priority (w));
		2316
		2317	#if EV_USE_INOTIFY
		2318	infy_init (EV_A);
		2319
		2320	if (fs_fd >= 0)
		2321	infy_add (EV_A_ w);
		2322	else
		2323	#endif
		2324	ev_timer_start (EV_A_ &w->timer);
		2325
		2326	ev_start (EV_A_ (W)w, 1);
		2327	}
		2328
		2329	void
		2330	ev_stat_stop (EV_P_ ev_stat *w)
		2331	{
		2332	clear_pending (EV_A_ (W)w);
		2333	if (expect_false (!ev_is_active (w)))
		2334	return;
		2335
		2336	#if EV_USE_INOTIFY
		2337	infy_del (EV_A_ w);
		2338	#endif
		2339	ev_timer_stop (EV_A_ &w->timer);
		2340
		2341	ev_stop (EV_A_ (W)w);
		2342	}
		2343	#endif
		2344
		2345	#if EV_IDLE_ENABLE
		2346	void
		2347	ev_idle_start (EV_P_ ev_idle *w)
		2348	{
		2349	if (expect_false (ev_is_active (w)))
		2350	return;
		2351
		2352	pri_adjust (EV_A_ (W)w);
		2353
		2354	{
		2355	int active = ++idlecnt [ABSPRI (w)];
		2356
		2357	++idleall;
		2358	ev_start (EV_A_ (W)w, active);
		2359
		2360	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2361	idles [ABSPRI (w)][active - 1] = w;
		2362	}
		2363	}
		2364
		2365	void
		2366	ev_idle_stop (EV_P_ ev_idle *w)
		2367	{
		2368	clear_pending (EV_A_ (W)w);
		2369	if (expect_false (!ev_is_active (w)))
		2370	return;
		2371
		2372	{
		2373	int active = ev_active (w);
		2374
		2375	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2376	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2377
		2378	ev_stop (EV_A_ (W)w);
		2379	--idleall;
		2380	}
		2381	}
		2382	#endif
		2383
		2384	void
		2385	ev_prepare_start (EV_P_ ev_prepare *w)
		2386	{
		2387	if (expect_false (ev_is_active (w)))
		2388	return;
		2389
		2390	ev_start (EV_A_ (W)w, ++preparecnt);
		2391	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2392	prepares [preparecnt - 1] = w;
		2393	}
		2394
		2395	void
		2396	ev_prepare_stop (EV_P_ ev_prepare *w)
		2397	{
		2398	clear_pending (EV_A_ (W)w);
		2399	if (expect_false (!ev_is_active (w)))
		2400	return;
		2401
		2402	{
		2403	int active = ev_active (w);
		2404
		2405	prepares [active - 1] = prepares [--preparecnt];
		2406	ev_active (prepares [active - 1]) = active;
		2407	}
		2408
		2409	ev_stop (EV_A_ (W)w);
		2410	}
		2411
		2412	void
		2413	ev_check_start (EV_P_ ev_check *w)
		2414	{
		2415	if (expect_false (ev_is_active (w)))
		2416	return;
		2417
		2418	ev_start (EV_A_ (W)w, ++checkcnt);
		2419	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2420	checks [checkcnt - 1] = w;
		2421	}
		2422
		2423	void
		2424	ev_check_stop (EV_P_ ev_check *w)
		2425	{
		2426	clear_pending (EV_A_ (W)w);
		2427	if (expect_false (!ev_is_active (w)))
		2428	return;
		2429
		2430	{
		2431	int active = ev_active (w);
		2432
		2433	checks [active - 1] = checks [--checkcnt];
		2434	ev_active (checks [active - 1]) = active;
		2435	}
		2436
		2437	ev_stop (EV_A_ (W)w);
		2438	}
		2439
		2440	#if EV_EMBED_ENABLE
		2441	void noinline
		2442	ev_embed_sweep (EV_P_ ev_embed *w)
		2443	{
		2444	ev_loop (w->other, EVLOOP_NONBLOCK);
		2445	}
		2446
		2447	static void
		2448	embed_io_cb (EV_P_ ev_io *io, int revents)
		2449	{
		2450	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2451
		2452	if (ev_cb (w))
		2453	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2454	else
		2455	ev_loop (w->other, EVLOOP_NONBLOCK);
		2456	}
		2457
		2458	static void
		2459	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2460	{
		2461	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2462
		2463	{
		2464	struct ev_loop *loop = w->other;
		2465
		2466	while (fdchangecnt)
		2467	{
		2468	fd_reify (EV_A);
		2469	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2470	}
		2471	}
		2472	}
		2473
		2474	#if 0
		2475	static void
		2476	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2477	{
		2478	ev_idle_stop (EV_A_ idle);
		2479	}
		2480	#endif
		2481
		2482	void
		2483	ev_embed_start (EV_P_ ev_embed *w)
		2484	{
		2485	if (expect_false (ev_is_active (w)))
		2486	return;
		2487
		2488	{
		2489	struct ev_loop *loop = w->other;
		2490	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2491	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2492	}
		2493
		2494	ev_set_priority (&w->io, ev_priority (w));
		2495	ev_io_start (EV_A_ &w->io);
		2496
		2497	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2498	ev_set_priority (&w->prepare, EV_MINPRI);
		2499	ev_prepare_start (EV_A_ &w->prepare);
		2500
		2501	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2502
		2503	ev_start (EV_A_ (W)w, 1);
		2504	}
		2505
		2506	void
		2507	ev_embed_stop (EV_P_ ev_embed *w)
		2508	{
		2509	clear_pending (EV_A_ (W)w);
		2510	if (expect_false (!ev_is_active (w)))
		2511	return;
		2512
		2513	ev_io_stop (EV_A_ &w->io);
		2514	ev_prepare_stop (EV_A_ &w->prepare);
		2515
		2516	ev_stop (EV_A_ (W)w);
		2517	}
		2518	#endif
		2519
		2520	#if EV_FORK_ENABLE
		2521	void
		2522	ev_fork_start (EV_P_ ev_fork *w)
		2523	{
		2524	if (expect_false (ev_is_active (w)))
		2525	return;
		2526
		2527	ev_start (EV_A_ (W)w, ++forkcnt);
		2528	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2529	forks [forkcnt - 1] = w;
		2530	}
		2531
		2532	void
		2533	ev_fork_stop (EV_P_ ev_fork *w)
		2534	{
		2535	clear_pending (EV_A_ (W)w);
		2536	if (expect_false (!ev_is_active (w)))
		2537	return;
		2538
		2539	{
		2540	int active = ev_active (w);
		2541
		2542	forks [active - 1] = forks [--forkcnt];
		2543	ev_active (forks [active - 1]) = active;
		2544	}
		2545
		2546	ev_stop (EV_A_ (W)w);
		2547	}
		2548	#endif
		2549
		2550	#if EV_ASYNC_ENABLE
		2551	void
		2552	ev_async_start (EV_P_ ev_async *w)
		2553	{
		2554	if (expect_false (ev_is_active (w)))
		2555	return;
		2556
		2557	evpipe_init (EV_A);
		2558
		2559	ev_start (EV_A_ (W)w, ++asynccnt);
		2560	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2561	asyncs [asynccnt - 1] = w;
		2562	}
		2563
		2564	void
		2565	ev_async_stop (EV_P_ ev_async *w)
		2566	{
		2567	clear_pending (EV_A_ (W)w);
		2568	if (expect_false (!ev_is_active (w)))
		2569	return;
		2570
		2571	{
		2572	int active = ev_active (w);
		2573
		2574	asyncs [active - 1] = asyncs [--asynccnt];
		2575	ev_active (asyncs [active - 1]) = active;
		2576	}
		2577
		2578	ev_stop (EV_A_ (W)w);
		2579	}
		2580
		2581	void
		2582	ev_async_send (EV_P_ ev_async *w)
		2583	{
		2584	w->sent = 1;
		2585	evpipe_write (EV_A_ &gotasync);
		2586	}
		2587	#endif
		2588
1383	/*****************************************************************************/	2589	/*****************************************************************************/
1384		2590
1385	struct ev_once	2591	struct ev_once
1386	{	2592	{
1387	struct ev_io io;	2593	ev_io io;
1388	struct ev_timer to;	2594	ev_timer to;
1389	void (*cb)(int revents, void *arg);	2595	void (*cb)(int revents, void *arg);
1390	void *arg;	2596	void *arg;
1391	};	2597	};
1392		2598
1393	static void	2599	static void
…		…
1396	void (*cb)(int revents, void *arg) = once->cb;	2602	void (*cb)(int revents, void *arg) = once->cb;
1397	void *arg = once->arg;	2603	void *arg = once->arg;
1398		2604
1399	ev_io_stop (EV_A_ &once->io);	2605	ev_io_stop (EV_A_ &once->io);
1400	ev_timer_stop (EV_A_ &once->to);	2606	ev_timer_stop (EV_A_ &once->to);
1401	free (once);	2607	ev_free (once);
1402		2608
1403	cb (revents, arg);	2609	cb (revents, arg);
1404	}	2610	}
1405		2611
1406	static void	2612	static void
1407	once_cb_io (EV_P_ struct ev_io *w, int revents)	2613	once_cb_io (EV_P_ ev_io *w, int revents)
1408	{	2614	{
1409	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2615	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1410	}	2616	}
1411		2617
1412	static void	2618	static void
1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2619	once_cb_to (EV_P_ ev_timer *w, int revents)
1414	{	2620	{
1415	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2621	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1416	}	2622	}
1417		2623
1418	void	2624	void
1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2625	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1420	{	2626	{
1421	struct ev_once *once = malloc (sizeof (struct ev_once));	2627	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1422		2628
1423	if (!once)	2629	if (expect_false (!once))
		2630	{
1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2631	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1425	else	2632	return;
1426	{	2633	}
		2634
1427	once->cb = cb;	2635	once->cb = cb;
1428	once->arg = arg;	2636	once->arg = arg;
1429		2637
1430	ev_watcher_init (&once->io, once_cb_io);	2638	ev_init (&once->io, once_cb_io);
1431	if (fd >= 0)	2639	if (fd >= 0)
1432	{	2640	{
1433	ev_io_set (&once->io, fd, events);	2641	ev_io_set (&once->io, fd, events);
1434	ev_io_start (EV_A_ &once->io);	2642	ev_io_start (EV_A_ &once->io);
1435	}	2643	}
1436		2644
1437	ev_watcher_init (&once->to, once_cb_to);	2645	ev_init (&once->to, once_cb_to);
1438	if (timeout >= 0.)	2646	if (timeout >= 0.)
1439	{	2647	{
1440	ev_timer_set (&once->to, timeout, 0.);	2648	ev_timer_set (&once->to, timeout, 0.);
1441	ev_timer_start (EV_A_ &once->to);	2649	ev_timer_start (EV_A_ &once->to);
1442	}
1443	}	2650	}
1444	}	2651	}
1445		2652
		2653	#if EV_MULTIPLICITY
		2654	#include "ev_wrap.h"
		2655	#endif
		2656
		2657	#ifdef __cplusplus
		2658	}
		2659	#endif
		2660

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines