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Comparing libev/ev.c (file contents):
Revision 1.101 by root, Sun Nov 11 04:04:23 2007 UTC vs.
Revision 1.246 by root, Wed May 21 12:51:38 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
37	# include "config.h"	49	# include "config.h"
		50	# endif
38		51
39	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
40	# ifndef EV_USE_MONOTONIC	53	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
42	# endif	55	# endif
43	# ifndef EV_USE_REALTIME	56	# ifndef EV_USE_REALTIME
44	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
45	# endif	58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
46	# endif	66	# endif
47		67
48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
49	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
50	# endif	74	# endif
51		75
52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
53	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
54	# endif	82	# endif
55		83
56	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
57	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
58	# endif	90	# endif
59		91
60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
62	# endif	98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
63		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
64	#endif	132	#endif
65		133
66	#include <math.h>	134	#include <math.h>
67	#include <stdlib.h>	135	#include <stdlib.h>
68	#include <fcntl.h>	136	#include <fcntl.h>
…		…
75	#include <sys/types.h>	143	#include <sys/types.h>
76	#include <time.h>	144	#include <time.h>
77		145
78	#include <signal.h>	146	#include <signal.h>
79		147
80	#ifndef WIN32
81	# include <unistd.h>
82	# include <sys/time.h>
83	# include <sys/wait.h>
84	#endif
85	/**/
86
87	#ifndef EV_USE_MONOTONIC
88	# define EV_USE_MONOTONIC 1
89	#endif
90
91	#ifndef EV_USE_SELECT
92	# define EV_USE_SELECT 1
93	#endif
94
95	#ifndef EV_USE_POLL
96	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97	#endif
98
99	#ifndef EV_USE_EPOLL
100	# define EV_USE_EPOLL 0
101	#endif
102
103	#ifndef EV_USE_KQUEUE
104	# define EV_USE_KQUEUE 0
105	#endif
106
107	#ifndef EV_USE_WIN32
108	# ifdef WIN32
109	# define EV_USE_WIN32 0 /* it does not exist, use select */
110	# undef EV_USE_SELECT
111	# define EV_USE_SELECT 1
112	# else
113	# define EV_USE_WIN32 0
114	# endif
115	#endif
116
117	#ifndef EV_USE_REALTIME
118	# define EV_USE_REALTIME 1
119	#endif
120
121	/**/
122
123	#ifndef CLOCK_MONOTONIC
124	# undef EV_USE_MONOTONIC
125	# define EV_USE_MONOTONIC 0
126	#endif
127
128	#ifndef CLOCK_REALTIME
129	# undef EV_USE_REALTIME
130	# define EV_USE_REALTIME 0
131	#endif
132
133	/**/
134
135	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139
140	#ifdef EV_H	148	#ifdef EV_H
141	# include EV_H	149	# include EV_H
142	#else	150	#else
143	# include "ev.h"	151	# include "ev.h"
144	#endif	152	#endif
145		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
		180	#ifndef EV_USE_SELECT
		181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
		192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
		196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#ifndef EV_USE_4HEAP
		241	# define EV_USE_4HEAP !EV_MINIMAL
		242	#endif
		243
		244	#ifndef EV_HEAP_CACHE_AT
		245	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		246	#endif
		247
		248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		249
		250	#ifndef CLOCK_MONOTONIC
		251	# undef EV_USE_MONOTONIC
		252	# define EV_USE_MONOTONIC 0
		253	#endif
		254
		255	#ifndef CLOCK_REALTIME
		256	# undef EV_USE_REALTIME
		257	# define EV_USE_REALTIME 0
		258	#endif
		259
		260	#if !EV_STAT_ENABLE
		261	# undef EV_USE_INOTIFY
		262	# define EV_USE_INOTIFY 0
		263	#endif
		264
		265	#if !EV_USE_NANOSLEEP
		266	# ifndef _WIN32
		267	# include <sys/select.h>
		268	# endif
		269	#endif
		270
		271	#if EV_USE_INOTIFY
		272	# include <sys/inotify.h>
		273	#endif
		274
		275	#if EV_SELECT_IS_WINSOCKET
		276	# include <winsock.h>
		277	#endif
		278
		279	#if EV_USE_EVENTFD
		280	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		281	# include <stdint.h>
		282	# ifdef __cplusplus
		283	extern "C" {
		284	# endif
		285	int eventfd (unsigned int initval, int flags);
		286	# ifdef __cplusplus
		287	}
		288	# endif
		289	#endif
		290
		291	/**/
		292
		293	/*
		294	* This is used to avoid floating point rounding problems.
		295	* It is added to ev_rt_now when scheduling periodics
		296	* to ensure progress, time-wise, even when rounding
		297	* errors are against us.
		298	* This value is good at least till the year 4000.
		299	* Better solutions welcome.
		300	*/
		301	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		302
		303	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		304	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		305	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		306
146	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
147	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
148	# define inline inline	309	# define noinline __attribute__ ((noinline))
149	#else	310	#else
150	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
151	# define inline static	312	# define noinline
		313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		314	# define inline
		315	# endif
152	#endif	316	#endif
153		317
154	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
155	#define expect_true(expr) expect ((expr) != 0, 1)	319	#define expect_true(expr) expect ((expr) != 0, 1)
		320	#define inline_size static inline
		321
		322	#if EV_MINIMAL
		323	# define inline_speed static noinline
		324	#else
		325	# define inline_speed static inline
		326	#endif
156		327
157	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	328	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
158	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	329	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
159		330
		331	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		332	#define EMPTY2(a,b) /* used to suppress some warnings */
		333
160	typedef struct ev_watcher *W;	334	typedef ev_watcher *W;
161	typedef struct ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
162	typedef struct ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
163		337
		338	#define ev_active(w) ((W)(w))->active
		339	#define ev_at(w) ((WT)(w))->at
		340
		341	#if EV_USE_MONOTONIC
		342	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		343	/* giving it a reasonably high chance of working on typical architetcures */
164	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	344	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		345	#endif
165		346
166	#ifdef WIN32	347	#ifdef _WIN32
167	# include "ev_win32.c"	348	# include "ev_win32.c"
168	#endif	349	#endif
169		350
170	/*****************************************************************************/	351	/*****************************************************************************/
171		352
172	static void (*syserr_cb)(const char *msg);	353	static void (*syserr_cb)(const char *msg);
173		354
		355	void
174	void ev_set_syserr_cb (void (*cb)(const char *msg))	356	ev_set_syserr_cb (void (*cb)(const char *msg))
175	{	357	{
176	syserr_cb = cb;	358	syserr_cb = cb;
177	}	359	}
178		360
179	static void	361	static void noinline
180	syserr (const char *msg)	362	syserr (const char *msg)
181	{	363	{
182	if (!msg)	364	if (!msg)
183	msg = "(libev) system error";	365	msg = "(libev) system error";
184		366
…		…
189	perror (msg);	371	perror (msg);
190	abort ();	372	abort ();
191	}	373	}
192	}	374	}
193		375
		376	static void *
		377	ev_realloc_emul (void *ptr, long size)
		378	{
		379	/* some systems, notably openbsd and darwin, fail to properly
		380	* implement realloc (x, 0) (as required by both ansi c-98 and
		381	* the single unix specification, so work around them here.
		382	*/
		383
		384	if (size)
		385	return realloc (ptr, size);
		386
		387	free (ptr);
		388	return 0;
		389	}
		390
194	static void *(*alloc)(void *ptr, long size);	391	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195		392
		393	void
196	void ev_set_allocator (void *(*cb)(void *ptr, long size))	394	ev_set_allocator (void *(*cb)(void *ptr, long size))
197	{	395	{
198	alloc = cb;	396	alloc = cb;
199	}	397	}
200		398
201	static void *	399	inline_speed void *
202	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
203	{	401	{
204	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
205		403
206	if (!ptr && size)	404	if (!ptr && size)
207	{	405	{
208	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
209	abort ();	407	abort ();
…		…
220	typedef struct	418	typedef struct
221	{	419	{
222	WL head;	420	WL head;
223	unsigned char events;	421	unsigned char events;
224	unsigned char reify;	422	unsigned char reify;
		423	#if EV_SELECT_IS_WINSOCKET
		424	SOCKET handle;
		425	#endif
225	} ANFD;	426	} ANFD;
226		427
227	typedef struct	428	typedef struct
228	{	429	{
229	W w;	430	W w;
230	int events;	431	int events;
231	} ANPENDING;	432	} ANPENDING;
		433
		434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
		436	typedef struct
		437	{
		438	WL head;
		439	} ANFS;
		440	#endif
		441
		442	/* Heap Entry */
		443	#if EV_HEAP_CACHE_AT
		444	typedef struct {
		445	ev_tstamp at;
		446	WT w;
		447	} ANHE;
		448
		449	#define ANHE_w(he) (he).w /* access watcher, read-write */
		450	#define ANHE_at(he) (he).at /* access cached at, read-only */
		451	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		452	#else
		453	typedef WT ANHE;
		454
		455	#define ANHE_w(he) (he)
		456	#define ANHE_at(he) (he)->at
		457	#define ANHE_at_set(he)
		458	#endif
232		459
233	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
234		461
235	struct ev_loop	462	struct ev_loop
236	{	463	{
…		…
240	#include "ev_vars.h"	467	#include "ev_vars.h"
241	#undef VAR	468	#undef VAR
242	};	469	};
243	#include "ev_wrap.h"	470	#include "ev_wrap.h"
244		471
245	struct ev_loop default_loop_struct;	472	static struct ev_loop default_loop_struct;
246	static struct ev_loop *default_loop;	473	struct ev_loop *ev_default_loop_ptr;
247		474
248	#else	475	#else
249		476
250	ev_tstamp ev_rt_now;	477	ev_tstamp ev_rt_now;
251	#define VAR(name,decl) static decl;	478	#define VAR(name,decl) static decl;
252	#include "ev_vars.h"	479	#include "ev_vars.h"
253	#undef VAR	480	#undef VAR
254		481
255	static int default_loop;	482	static int ev_default_loop_ptr;
256		483
257	#endif	484	#endif
258		485
259	/*****************************************************************************/	486	/*****************************************************************************/
260		487
…		…
270	gettimeofday (&tv, 0);	497	gettimeofday (&tv, 0);
271	return tv.tv_sec + tv.tv_usec * 1e-6;	498	return tv.tv_sec + tv.tv_usec * 1e-6;
272	#endif	499	#endif
273	}	500	}
274		501
275	inline ev_tstamp	502	ev_tstamp inline_size
276	get_clock (void)	503	get_clock (void)
277	{	504	{
278	#if EV_USE_MONOTONIC	505	#if EV_USE_MONOTONIC
279	if (expect_true (have_monotonic))	506	if (expect_true (have_monotonic))
280	{	507	{
…		…
293	{	520	{
294	return ev_rt_now;	521	return ev_rt_now;
295	}	522	}
296	#endif	523	#endif
297		524
298	#define array_roundsize(type,n) ((n) | 4 & ~3)	525	void
		526	ev_sleep (ev_tstamp delay)
		527	{
		528	if (delay > 0.)
		529	{
		530	#if EV_USE_NANOSLEEP
		531	struct timespec ts;
		532
		533	ts.tv_sec = (time_t)delay;
		534	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		535
		536	nanosleep (&ts, 0);
		537	#elif defined(_WIN32)
		538	Sleep ((unsigned long)(delay * 1e3));
		539	#else
		540	struct timeval tv;
		541
		542	tv.tv_sec = (time_t)delay;
		543	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		544
		545	select (0, 0, 0, 0, &tv);
		546	#endif
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		553
		554	int inline_size
		555	array_nextsize (int elem, int cur, int cnt)
		556	{
		557	int ncur = cur + 1;
		558
		559	do
		560	ncur <<= 1;
		561	while (cnt > ncur);
		562
		563	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		564	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		565	{
		566	ncur *= elem;
		567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		568	ncur = ncur - sizeof (void *) * 4;
		569	ncur /= elem;
		570	}
		571
		572	return ncur;
		573	}
		574
		575	static noinline void *
		576	array_realloc (int elem, void *base, int *cur, int cnt)
		577	{
		578	*cur = array_nextsize (elem, *cur, cnt);
		579	return ev_realloc (base, elem * *cur);
		580	}
299		581
300	#define array_needsize(type,base,cur,cnt,init) \	582	#define array_needsize(type,base,cur,cnt,init) \
301	if (expect_false ((cnt) > cur)) \	583	if (expect_false ((cnt) > (cur))) \
302	{ \	584	{ \
303	int newcnt = cur; \	585	int ocur_ = (cur); \
304	do \	586	(base) = (type *)array_realloc \
305	{ \	587	(sizeof (type), (base), &(cur), (cnt)); \
306	newcnt = array_roundsize (type, newcnt << 1); \	588	init ((base) + (ocur_), (cur) - ocur_); \
307	} \
308	while ((cnt) > newcnt); \
309	\
310	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
311	init (base + cur, newcnt - cur); \
312	cur = newcnt; \
313	}	589	}
314		590
		591	#if 0
315	#define array_slim(type,stem) \	592	#define array_slim(type,stem) \
316	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	593	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
317	{ \	594	{ \
318	stem ## max = array_roundsize (stem ## cnt >> 1); \	595	stem ## max = array_roundsize (stem ## cnt >> 1); \
319	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	596	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
320	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	597	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
321	}	598	}
322		599	#endif
323	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
324	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
325	#define array_free_microshit(stem) \
326	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
327		600
328	#define array_free(stem, idx) \	601	#define array_free(stem, idx) \
329	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	602	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
330		603
331	/*****************************************************************************/	604	/*****************************************************************************/
332		605
333	static void	606	void noinline
		607	ev_feed_event (EV_P_ void *w, int revents)
		608	{
		609	W w_ = (W)w;
		610	int pri = ABSPRI (w_);
		611
		612	if (expect_false (w_->pending))
		613	pendings [pri][w_->pending - 1].events |= revents;
		614	else
		615	{
		616	w_->pending = ++pendingcnt [pri];
		617	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		618	pendings [pri][w_->pending - 1].w = w_;
		619	pendings [pri][w_->pending - 1].events = revents;
		620	}
		621	}
		622
		623	void inline_speed
		624	queue_events (EV_P_ W *events, int eventcnt, int type)
		625	{
		626	int i;
		627
		628	for (i = 0; i < eventcnt; ++i)
		629	ev_feed_event (EV_A_ events [i], type);
		630	}
		631
		632	/*****************************************************************************/
		633
		634	void inline_size
334	anfds_init (ANFD *base, int count)	635	anfds_init (ANFD *base, int count)
335	{	636	{
336	while (count--)	637	while (count--)
337	{	638	{
338	base->head = 0;	639	base->head = 0;
…		…
341		642
342	++base;	643	++base;
343	}	644	}
344	}	645	}
345		646
346	void	647	void inline_speed
347	ev_feed_event (EV_P_ void *w, int revents)
348	{
349	W w_ = (W)w;
350
351	if (w_->pending)
352	{
353	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
354	return;
355	}
356
357	w_->pending = ++pendingcnt [ABSPRI (w_)];
358	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
359	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
360	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
361	}
362
363	static void
364	queue_events (EV_P_ W *events, int eventcnt, int type)
365	{
366	int i;
367
368	for (i = 0; i < eventcnt; ++i)
369	ev_feed_event (EV_A_ events [i], type);
370	}
371
372	inline void
373	fd_event (EV_P_ int fd, int revents)	648	fd_event (EV_P_ int fd, int revents)
374	{	649	{
375	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
376	struct ev_io *w;	651	ev_io *w;
377		652
378	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)
379	{	654	{
380	int ev = w->events & revents;	655	int ev = w->events & revents;
381		656
382	if (ev)	657	if (ev)
383	ev_feed_event (EV_A_ (W)w, ev);	658	ev_feed_event (EV_A_ (W)w, ev);
…		…
385	}	660	}
386		661
387	void	662	void
388	ev_feed_fd_event (EV_P_ int fd, int revents)	663	ev_feed_fd_event (EV_P_ int fd, int revents)
389	{	664	{
		665	if (fd >= 0 && fd < anfdmax)
390	fd_event (EV_A_ fd, revents);	666	fd_event (EV_A_ fd, revents);
391	}	667	}
392		668
393	/*****************************************************************************/	669	void inline_size
394
395	static void
396	fd_reify (EV_P)	670	fd_reify (EV_P)
397	{	671	{
398	int i;	672	int i;
399		673
400	for (i = 0; i < fdchangecnt; ++i)	674	for (i = 0; i < fdchangecnt; ++i)
401	{	675	{
402	int fd = fdchanges [i];	676	int fd = fdchanges [i];
403	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
404	struct ev_io *w;	678	ev_io *w;
405		679
406	int events = 0;	680	unsigned char events = 0;
407		681
408	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	682	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409	events |= w->events;	683	events |= (unsigned char)w->events;
410		684
		685	#if EV_SELECT_IS_WINSOCKET
		686	if (events)
		687	{
		688	unsigned long argp;
		689	#ifdef EV_FD_TO_WIN32_HANDLE
		690	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		691	#else
		692	anfd->handle = _get_osfhandle (fd);
		693	#endif
		694	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		695	}
		696	#endif
		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
411	anfd->reify = 0;	702	anfd->reify = 0;
412
413	method_modify (EV_A_ fd, anfd->events, events);
414	anfd->events = events;	703	anfd->events = events;
		704
		705	if (o_events != events || o_reify & EV_IOFDSET)
		706	backend_modify (EV_A_ fd, o_events, events);
		707	}
415	}	708	}
416		709
417	fdchangecnt = 0;	710	fdchangecnt = 0;
418	}	711	}
419		712
420	static void	713	void inline_size
421	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
422	{	715	{
423	if (anfds [fd].reify)	716	unsigned char reify = anfds [fd].reify;
424	return;
425
426	anfds [fd].reify = 1;	717	anfds [fd].reify |= flags;
427		718
		719	if (expect_true (!reify))
		720	{
428	++fdchangecnt;	721	++fdchangecnt;
429	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
430	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
431	}	725	}
432		726
433	static void	727	void inline_speed
434	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
435	{	729	{
436	struct ev_io *w;	730	ev_io *w;
437		731
438	while ((w = (struct ev_io *)anfds [fd].head))	732	while ((w = (ev_io *)anfds [fd].head))
439	{	733	{
440	ev_io_stop (EV_A_ w);	734	ev_io_stop (EV_A_ w);
441	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	735	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
442	}	736	}
443	}	737	}
444		738
445	static int	739	int inline_size
446	fd_valid (int fd)	740	fd_valid (int fd)
447	{	741	{
448	#ifdef WIN32	742	#ifdef _WIN32
449	return !!win32_get_osfhandle (fd);	743	return _get_osfhandle (fd) != -1;
450	#else	744	#else
451	return fcntl (fd, F_GETFD) != -1;	745	return fcntl (fd, F_GETFD) != -1;
452	#endif	746	#endif
453	}	747	}
454		748
455	/* called on EBADF to verify fds */	749	/* called on EBADF to verify fds */
456	static void	750	static void noinline
457	fd_ebadf (EV_P)	751	fd_ebadf (EV_P)
458	{	752	{
459	int fd;	753	int fd;
460		754
461	for (fd = 0; fd < anfdmax; ++fd)	755	for (fd = 0; fd < anfdmax; ++fd)
…		…
463	if (!fd_valid (fd) == -1 && errno == EBADF)	757	if (!fd_valid (fd) == -1 && errno == EBADF)
464	fd_kill (EV_A_ fd);	758	fd_kill (EV_A_ fd);
465	}	759	}
466		760
467	/* called on ENOMEM in select/poll to kill some fds and retry */	761	/* called on ENOMEM in select/poll to kill some fds and retry */
468	static void	762	static void noinline
469	fd_enomem (EV_P)	763	fd_enomem (EV_P)
470	{	764	{
471	int fd;	765	int fd;
472		766
473	for (fd = anfdmax; fd--; )	767	for (fd = anfdmax; fd--; )
…		…
476	fd_kill (EV_A_ fd);	770	fd_kill (EV_A_ fd);
477	return;	771	return;
478	}	772	}
479	}	773	}
480		774
481	/* usually called after fork if method needs to re-arm all fds from scratch */	775	/* usually called after fork if backend needs to re-arm all fds from scratch */
482	static void	776	static void noinline
483	fd_rearm_all (EV_P)	777	fd_rearm_all (EV_P)
484	{	778	{
485	int fd;	779	int fd;
486		780
487	/* this should be highly optimised to not do anything but set a flag */
488	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
489	if (anfds [fd].events)	782	if (anfds [fd].events)
490	{	783	{
491	anfds [fd].events = 0;	784	anfds [fd].events = 0;
492	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET | 1);
493	}	786	}
494	}	787	}
495		788
496	/*****************************************************************************/	789	/*****************************************************************************/
497		790
498	static void	791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807
		808	/* towards the root */
		809	void inline_speed
499	upheap (WT *heap, int k)	810	upheap (ANHE *heap, int k)
500	{	811	{
501	WT w = heap [k];	812	ANHE he = heap [k];
502		813
503	while (k && heap [k >> 1]->at > w->at)	814	for (;;)
504	{
505	heap [k] = heap [k >> 1];
506	((W)heap [k])->active = k + 1;
507	k >>= 1;
508	}	815	{
		816	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
509		817
510	heap [k] = w;	818	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
511	((W)heap [k])->active = k + 1;
512
513	}
514
515	static void
516	downheap (WT *heap, int N, int k)
517	{
518	WT w = heap [k];
519
520	while (k < (N >> 1))
521	{
522	int j = k << 1;
523
524	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
525	++j;
526
527	if (w->at <= heap [j]->at)
528	break;	819	break;
529		820
530	heap [k] = heap [j];	821	heap [k] = heap [p];
531	((W)heap [k])->active = k + 1;	822	ev_active (ANHE_w (heap [k])) = k;
532	k = j;	823	k = p;
533	}	824	}
534		825
		826	ev_active (ANHE_w (he)) = k;
535	heap [k] = w;	827	heap [k] = he;
536	((W)heap [k])->active = k + 1;
537	}	828	}
538		829
539	inline void	830	/* away from the root */
		831	void inline_speed
		832	downheap (ANHE *heap, int N, int k)
		833	{
		834	ANHE he = heap [k];
		835	ANHE *E = heap + N + HEAP0;
		836
		837	for (;;)
		838	{
		839	ev_tstamp minat;
		840	ANHE *minpos;
		841	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		842
		843	// find minimum child
		844	if (expect_true (pos + DHEAP - 1 < E))
		845	{
		846	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else if (pos < E)
		852	{
		853	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		854	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		855	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		856	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		857	}
		858	else
		859	break;
		860
		861	if (ANHE_at (he) <= minat)
		862	break;
		863
		864	ev_active (ANHE_w (*minpos)) = k;
		865	heap [k] = *minpos;
		866
		867	k = minpos - heap;
		868	}
		869
		870	ev_active (ANHE_w (he)) = k;
		871	heap [k] = he;
		872	}
		873
		874	#else // 4HEAP
		875
		876	#define HEAP0 1
		877
		878	/* towards the root */
		879	void inline_speed
		880	upheap (ANHE *heap, int k)
		881	{
		882	ANHE he = heap [k];
		883
		884	for (;;)
		885	{
		886	int p = k >> 1;
		887
		888	/* maybe we could use a dummy element at heap [0]? */
		889	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		890	break;
		891
		892	heap [k] = heap [p];
		893	ev_active (ANHE_w (heap [k])) = k;
		894	k = p;
		895	}
		896
		897	heap [k] = he;
		898	ev_active (ANHE_w (heap [k])) = k;
		899	}
		900
		901	/* away from the root */
		902	void inline_speed
		903	downheap (ANHE *heap, int N, int k)
		904	{
		905	ANHE he = heap [k];
		906
		907	for (;;)
		908	{
		909	int c = k << 1;
		910
		911	if (c > N)
		912	break;
		913
		914	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		915	? 1 : 0;
		916
		917	if (ANHE_at (he) <= ANHE_at (heap [c]))
		918	break;
		919
		920	heap [k] = heap [c];
		921	ev_active (ANHE_w (heap [k])) = k;
		922
		923	k = c;
		924	}
		925
		926	heap [k] = he;
		927	ev_active (ANHE_w (he)) = k;
		928	}
		929	#endif
		930
		931	void inline_size
540	adjustheap (WT *heap, int N, int k)	932	adjustheap (ANHE *heap, int N, int k)
541	{	933	{
542	upheap (heap, k);	934	upheap (heap, k);
543	downheap (heap, N, k);	935	downheap (heap, N, k);
544	}	936	}
545		937
546	/*****************************************************************************/	938	/*****************************************************************************/
547		939
548	typedef struct	940	typedef struct
549	{	941	{
550	WL head;	942	WL head;
551	sig_atomic_t volatile gotsig;	943	EV_ATOMIC_T gotsig;
552	} ANSIG;	944	} ANSIG;
553		945
554	static ANSIG *signals;	946	static ANSIG *signals;
555	static int signalmax;	947	static int signalmax;
556		948
557	static int sigpipe [2];	949	static EV_ATOMIC_T gotsig;
558	static sig_atomic_t volatile gotsig;
559	static struct ev_io sigev;
560		950
561	static void	951	void inline_size
562	signals_init (ANSIG *base, int count)	952	signals_init (ANSIG *base, int count)
563	{	953	{
564	while (count--)	954	while (count--)
565	{	955	{
566	base->head = 0;	956	base->head = 0;
…		…
568		958
569	++base;	959	++base;
570	}	960	}
571	}	961	}
572		962
		963	/*****************************************************************************/
		964
		965	void inline_speed
		966	fd_intern (int fd)
		967	{
		968	#ifdef _WIN32
		969	int arg = 1;
		970	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		971	#else
		972	fcntl (fd, F_SETFD, FD_CLOEXEC);
		973	fcntl (fd, F_SETFL, O_NONBLOCK);
		974	#endif
		975	}
		976
		977	static void noinline
		978	evpipe_init (EV_P)
		979	{
		980	if (!ev_is_active (&pipeev))
		981	{
		982	#if EV_USE_EVENTFD
		983	if ((evfd = eventfd (0, 0)) >= 0)
		984	{
		985	evpipe [0] = -1;
		986	fd_intern (evfd);
		987	ev_io_set (&pipeev, evfd, EV_READ);
		988	}
		989	else
		990	#endif
		991	{
		992	while (pipe (evpipe))
		993	syserr ("(libev) error creating signal/async pipe");
		994
		995	fd_intern (evpipe [0]);
		996	fd_intern (evpipe [1]);
		997	ev_io_set (&pipeev, evpipe [0], EV_READ);
		998	}
		999
		1000	ev_io_start (EV_A_ &pipeev);
		1001	ev_unref (EV_A); /* watcher should not keep loop alive */
		1002	}
		1003	}
		1004
		1005	void inline_size
		1006	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1007	{
		1008	if (!*flag)
		1009	{
		1010	int old_errno = errno; /* save errno because write might clobber it */
		1011
		1012	*flag = 1;
		1013
		1014	#if EV_USE_EVENTFD
		1015	if (evfd >= 0)
		1016	{
		1017	uint64_t counter = 1;
		1018	write (evfd, &counter, sizeof (uint64_t));
		1019	}
		1020	else
		1021	#endif
		1022	write (evpipe [1], &old_errno, 1);
		1023
		1024	errno = old_errno;
		1025	}
		1026	}
		1027
573	static void	1028	static void
		1029	pipecb (EV_P_ ev_io *iow, int revents)
		1030	{
		1031	#if EV_USE_EVENTFD
		1032	if (evfd >= 0)
		1033	{
		1034	uint64_t counter;
		1035	read (evfd, &counter, sizeof (uint64_t));
		1036	}
		1037	else
		1038	#endif
		1039	{
		1040	char dummy;
		1041	read (evpipe [0], &dummy, 1);
		1042	}
		1043
		1044	if (gotsig && ev_is_default_loop (EV_A))
		1045	{
		1046	int signum;
		1047	gotsig = 0;
		1048
		1049	for (signum = signalmax; signum--; )
		1050	if (signals [signum].gotsig)
		1051	ev_feed_signal_event (EV_A_ signum + 1);
		1052	}
		1053
		1054	#if EV_ASYNC_ENABLE
		1055	if (gotasync)
		1056	{
		1057	int i;
		1058	gotasync = 0;
		1059
		1060	for (i = asynccnt; i--; )
		1061	if (asyncs [i]->sent)
		1062	{
		1063	asyncs [i]->sent = 0;
		1064	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1065	}
		1066	}
		1067	#endif
		1068	}
		1069
		1070	/*****************************************************************************/
		1071
		1072	static void
574	sighandler (int signum)	1073	ev_sighandler (int signum)
575	{	1074	{
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *loop = &default_loop_struct;
		1077	#endif
		1078
576	#if WIN32	1079	#if _WIN32
577	signal (signum, sighandler);	1080	signal (signum, ev_sighandler);
578	#endif	1081	#endif
579		1082
580	signals [signum - 1].gotsig = 1;	1083	signals [signum - 1].gotsig = 1;
581		1084	evpipe_write (EV_A_ &gotsig);
582	if (!gotsig)
583	{
584	int old_errno = errno;
585	gotsig = 1;
586	#ifdef WIN32
587	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
588	#else
589	write (sigpipe [1], &signum, 1);
590	#endif
591	errno = old_errno;
592	}
593	}	1085	}
594		1086
595	void	1087	void noinline
596	ev_feed_signal_event (EV_P_ int signum)	1088	ev_feed_signal_event (EV_P_ int signum)
597	{	1089	{
598	WL w;	1090	WL w;
599		1091
600	#if EV_MULTIPLICITY	1092	#if EV_MULTIPLICITY
601	assert (("feeding signal events is only supported in the default loop", loop == default_loop));	1093	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
602	#endif	1094	#endif
603		1095
604	--signum;	1096	--signum;
605		1097
606	if (signum < 0 || signum >= signalmax)	1098	if (signum < 0 || signum >= signalmax)
…		…
610		1102
611	for (w = signals [signum].head; w; w = w->next)	1103	for (w = signals [signum].head; w; w = w->next)
612	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1104	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
613	}	1105	}
614		1106
615	static void
616	sigcb (EV_P_ struct ev_io *iow, int revents)
617	{
618	int signum;
619
620	#ifdef WIN32
621	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
622	#else
623	read (sigpipe [0], &revents, 1);
624	#endif
625	gotsig = 0;
626
627	for (signum = signalmax; signum--; )
628	if (signals [signum].gotsig)
629	ev_feed_signal_event (EV_A_ signum + 1);
630	}
631
632	static void
633	siginit (EV_P)
634	{
635	#ifndef WIN32
636	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
637	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
638
639	/* rather than sort out wether we really need nb, set it */
640	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
641	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
642	#endif
643
644	ev_io_set (&sigev, sigpipe [0], EV_READ);
645	ev_io_start (EV_A_ &sigev);
646	ev_unref (EV_A); /* child watcher should not keep loop alive */
647	}
648
649	/*****************************************************************************/	1107	/*****************************************************************************/
650		1108
651	static struct ev_child *childs [PID_HASHSIZE];	1109	static WL childs [EV_PID_HASHSIZE];
652		1110
653	#ifndef WIN32	1111	#ifndef _WIN32
654		1112
655	static struct ev_signal childev;	1113	static ev_signal childev;
		1114
		1115	#ifndef WIFCONTINUED
		1116	# define WIFCONTINUED(status) 0
		1117	#endif
		1118
		1119	void inline_speed
		1120	child_reap (EV_P_ int chain, int pid, int status)
		1121	{
		1122	ev_child *w;
		1123	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1124
		1125	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1126	{
		1127	if ((w->pid == pid || !w->pid)
		1128	&& (!traced || (w->flags & 1)))
		1129	{
		1130	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1131	w->rpid = pid;
		1132	w->rstatus = status;
		1133	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1134	}
		1135	}
		1136	}
656		1137
657	#ifndef WCONTINUED	1138	#ifndef WCONTINUED
658	# define WCONTINUED 0	1139	# define WCONTINUED 0
659	#endif	1140	#endif
660		1141
661	static void	1142	static void
662	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
663	{
664	struct ev_child *w;
665
666	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
667	if (w->pid == pid || !w->pid)
668	{
669	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
670	w->rpid = pid;
671	w->rstatus = status;
672	ev_feed_event (EV_A_ (W)w, EV_CHILD);
673	}
674	}
675
676	static void
677	childcb (EV_P_ struct ev_signal *sw, int revents)	1143	childcb (EV_P_ ev_signal *sw, int revents)
678	{	1144	{
679	int pid, status;	1145	int pid, status;
680		1146
		1147	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
681	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1148	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
682	{	1149	if (!WCONTINUED
		1150	|| errno != EINVAL
		1151	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1152	return;
		1153
683	/* make sure we are called again until all childs have been reaped */	1154	/* make sure we are called again until all children have been reaped */
		1155	/* we need to do it this way so that the callback gets called before we continue */
684	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1156	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
685		1157
686	child_reap (EV_A_ sw, pid, pid, status);	1158	child_reap (EV_A_ pid, pid, status);
		1159	if (EV_PID_HASHSIZE > 1)
687	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1160	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
688	}
689	}	1161	}
690		1162
691	#endif	1163	#endif
692		1164
693	/*****************************************************************************/	1165	/*****************************************************************************/
694		1166
		1167	#if EV_USE_PORT
		1168	# include "ev_port.c"
		1169	#endif
695	#if EV_USE_KQUEUE	1170	#if EV_USE_KQUEUE
696	# include "ev_kqueue.c"	1171	# include "ev_kqueue.c"
697	#endif	1172	#endif
698	#if EV_USE_EPOLL	1173	#if EV_USE_EPOLL
699	# include "ev_epoll.c"	1174	# include "ev_epoll.c"
…		…
716	{	1191	{
717	return EV_VERSION_MINOR;	1192	return EV_VERSION_MINOR;
718	}	1193	}
719		1194
720	/* return true if we are running with elevated privileges and should ignore env variables */	1195	/* return true if we are running with elevated privileges and should ignore env variables */
721	static int	1196	int inline_size
722	enable_secure (void)	1197	enable_secure (void)
723	{	1198	{
724	#ifdef WIN32	1199	#ifdef _WIN32
725	return 0;	1200	return 0;
726	#else	1201	#else
727	return getuid () != geteuid ()	1202	return getuid () != geteuid ()
728	|| getgid () != getegid ();	1203	|| getgid () != getegid ();
729	#endif	1204	#endif
730	}	1205	}
731		1206
732	int	1207	unsigned int
733	ev_method (EV_P)	1208	ev_supported_backends (void)
734	{	1209	{
735	return method;	1210	unsigned int flags = 0;
736	}
737		1211
738	static void	1212	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
739	loop_init (EV_P_ int methods)	1213	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1214	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1215	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1216	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1217
		1218	return flags;
		1219	}
		1220
		1221	unsigned int
		1222	ev_recommended_backends (void)
740	{	1223	{
741	if (!method)	1224	unsigned int flags = ev_supported_backends ();
		1225
		1226	#ifndef __NetBSD__
		1227	/* kqueue is borked on everything but netbsd apparently */
		1228	/* it usually doesn't work correctly on anything but sockets and pipes */
		1229	flags &= ~EVBACKEND_KQUEUE;
		1230	#endif
		1231	#ifdef __APPLE__
		1232	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1233	flags &= ~EVBACKEND_POLL;
		1234	#endif
		1235
		1236	return flags;
		1237	}
		1238
		1239	unsigned int
		1240	ev_embeddable_backends (void)
		1241	{
		1242	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1243
		1244	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1245	/* please fix it and tell me how to detect the fix */
		1246	flags &= ~EVBACKEND_EPOLL;
		1247
		1248	return flags;
		1249	}
		1250
		1251	unsigned int
		1252	ev_backend (EV_P)
		1253	{
		1254	return backend;
		1255	}
		1256
		1257	unsigned int
		1258	ev_loop_count (EV_P)
		1259	{
		1260	return loop_count;
		1261	}
		1262
		1263	void
		1264	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	io_blocktime = interval;
		1267	}
		1268
		1269	void
		1270	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1271	{
		1272	timeout_blocktime = interval;
		1273	}
		1274
		1275	static void noinline
		1276	loop_init (EV_P_ unsigned int flags)
		1277	{
		1278	if (!backend)
742	{	1279	{
743	#if EV_USE_MONOTONIC	1280	#if EV_USE_MONOTONIC
744	{	1281	{
745	struct timespec ts;	1282	struct timespec ts;
746	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1283	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
747	have_monotonic = 1;	1284	have_monotonic = 1;
748	}	1285	}
749	#endif	1286	#endif
750		1287
751	ev_rt_now = ev_time ();	1288	ev_rt_now = ev_time ();
752	mn_now = get_clock ();	1289	mn_now = get_clock ();
753	now_floor = mn_now;	1290	now_floor = mn_now;
754	rtmn_diff = ev_rt_now - mn_now;	1291	rtmn_diff = ev_rt_now - mn_now;
755		1292
756	if (methods == EVMETHOD_AUTO)	1293	io_blocktime = 0.;
757	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1294	timeout_blocktime = 0.;
		1295	backend = 0;
		1296	backend_fd = -1;
		1297	gotasync = 0;
		1298	#if EV_USE_INOTIFY
		1299	fs_fd = -2;
		1300	#endif
		1301
		1302	/* pid check not overridable via env */
		1303	#ifndef _WIN32
		1304	if (flags & EVFLAG_FORKCHECK)
		1305	curpid = getpid ();
		1306	#endif
		1307
		1308	if (!(flags & EVFLAG_NOENV)
		1309	&& !enable_secure ()
		1310	&& getenv ("LIBEV_FLAGS"))
758	methods = atoi (getenv ("LIBEV_METHODS"));	1311	flags = atoi (getenv ("LIBEV_FLAGS"));
759	else
760	methods = EVMETHOD_ANY;
761		1312
762	method = 0;	1313	if (!(flags & 0x0000ffffU))
763	#if EV_USE_WIN32	1314	flags |= ev_recommended_backends ();
764	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	1315
		1316	#if EV_USE_PORT
		1317	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
765	#endif	1318	#endif
766	#if EV_USE_KQUEUE	1319	#if EV_USE_KQUEUE
767	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1320	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
768	#endif	1321	#endif
769	#if EV_USE_EPOLL	1322	#if EV_USE_EPOLL
770	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1323	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
771	#endif	1324	#endif
772	#if EV_USE_POLL	1325	#if EV_USE_POLL
773	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1326	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
774	#endif	1327	#endif
775	#if EV_USE_SELECT	1328	#if EV_USE_SELECT
776	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1329	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
777	#endif	1330	#endif
778		1331
779	ev_init (&sigev, sigcb);	1332	ev_init (&pipeev, pipecb);
780	ev_set_priority (&sigev, EV_MAXPRI);	1333	ev_set_priority (&pipeev, EV_MAXPRI);
781	}	1334	}
782	}	1335	}
783		1336
784	void	1337	static void noinline
785	loop_destroy (EV_P)	1338	loop_destroy (EV_P)
786	{	1339	{
787	int i;	1340	int i;
788		1341
		1342	if (ev_is_active (&pipeev))
		1343	{
		1344	ev_ref (EV_A); /* signal watcher */
		1345	ev_io_stop (EV_A_ &pipeev);
		1346
		1347	#if EV_USE_EVENTFD
		1348	if (evfd >= 0)
		1349	close (evfd);
		1350	#endif
		1351
		1352	if (evpipe [0] >= 0)
		1353	{
		1354	close (evpipe [0]);
		1355	close (evpipe [1]);
		1356	}
		1357	}
		1358
789	#if EV_USE_WIN32	1359	#if EV_USE_INOTIFY
790	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	1360	if (fs_fd >= 0)
		1361	close (fs_fd);
		1362	#endif
		1363
		1364	if (backend_fd >= 0)
		1365	close (backend_fd);
		1366
		1367	#if EV_USE_PORT
		1368	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
791	#endif	1369	#endif
792	#if EV_USE_KQUEUE	1370	#if EV_USE_KQUEUE
793	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1371	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
794	#endif	1372	#endif
795	#if EV_USE_EPOLL	1373	#if EV_USE_EPOLL
796	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1374	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
797	#endif	1375	#endif
798	#if EV_USE_POLL	1376	#if EV_USE_POLL
799	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1377	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
800	#endif	1378	#endif
801	#if EV_USE_SELECT	1379	#if EV_USE_SELECT
802	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1380	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
803	#endif	1381	#endif
804		1382
805	for (i = NUMPRI; i--; )	1383	for (i = NUMPRI; i--; )
		1384	{
806	array_free (pending, [i]);	1385	array_free (pending, [i]);
		1386	#if EV_IDLE_ENABLE
		1387	array_free (idle, [i]);
		1388	#endif
		1389	}
		1390
		1391	ev_free (anfds); anfdmax = 0;
807		1392
808	/* have to use the microsoft-never-gets-it-right macro */	1393	/* have to use the microsoft-never-gets-it-right macro */
809	array_free_microshit (fdchange);	1394	array_free (fdchange, EMPTY);
810	array_free_microshit (timer);	1395	array_free (timer, EMPTY);
811	#if EV_PERIODICS	1396	#if EV_PERIODIC_ENABLE
812	array_free_microshit (periodic);	1397	array_free (periodic, EMPTY);
813	#endif	1398	#endif
814	array_free_microshit (idle);	1399	#if EV_FORK_ENABLE
815	array_free_microshit (prepare);	1400	array_free (fork, EMPTY);
816	array_free_microshit (check);	1401	#endif
		1402	array_free (prepare, EMPTY);
		1403	array_free (check, EMPTY);
		1404	#if EV_ASYNC_ENABLE
		1405	array_free (async, EMPTY);
		1406	#endif
817		1407
818	method = 0;	1408	backend = 0;
819	}	1409	}
820		1410
821	static void	1411	#if EV_USE_INOTIFY
		1412	void inline_size infy_fork (EV_P);
		1413	#endif
		1414
		1415	void inline_size
822	loop_fork (EV_P)	1416	loop_fork (EV_P)
823	{	1417	{
		1418	#if EV_USE_PORT
		1419	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1420	#endif
		1421	#if EV_USE_KQUEUE
		1422	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1423	#endif
824	#if EV_USE_EPOLL	1424	#if EV_USE_EPOLL
825	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1425	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
826	#endif	1426	#endif
827	#if EV_USE_KQUEUE	1427	#if EV_USE_INOTIFY
828	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1428	infy_fork (EV_A);
829	#endif	1429	#endif
830		1430
831	if (ev_is_active (&sigev))	1431	if (ev_is_active (&pipeev))
832	{	1432	{
833	/* default loop */	1433	/* this "locks" the handlers against writing to the pipe */
		1434	/* while we modify the fd vars */
		1435	gotsig = 1;
		1436	#if EV_ASYNC_ENABLE
		1437	gotasync = 1;
		1438	#endif
834		1439
835	ev_ref (EV_A);	1440	ev_ref (EV_A);
836	ev_io_stop (EV_A_ &sigev);	1441	ev_io_stop (EV_A_ &pipeev);
		1442
		1443	#if EV_USE_EVENTFD
		1444	if (evfd >= 0)
		1445	close (evfd);
		1446	#endif
		1447
		1448	if (evpipe [0] >= 0)
		1449	{
837	close (sigpipe [0]);	1450	close (evpipe [0]);
838	close (sigpipe [1]);	1451	close (evpipe [1]);
		1452	}
839		1453
840	while (pipe (sigpipe))
841	syserr ("(libev) error creating pipe");
842
843	siginit (EV_A);	1454	evpipe_init (EV_A);
		1455	/* now iterate over everything, in case we missed something */
		1456	pipecb (EV_A_ &pipeev, EV_READ);
844	}	1457	}
845		1458
846	postfork = 0;	1459	postfork = 0;
847	}	1460	}
848		1461
849	#if EV_MULTIPLICITY	1462	#if EV_MULTIPLICITY
850	struct ev_loop *	1463	struct ev_loop *
851	ev_loop_new (int methods)	1464	ev_loop_new (unsigned int flags)
852	{	1465	{
853	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1466	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
854		1467
855	memset (loop, 0, sizeof (struct ev_loop));	1468	memset (loop, 0, sizeof (struct ev_loop));
856		1469
857	loop_init (EV_A_ methods);	1470	loop_init (EV_A_ flags);
858		1471
859	if (ev_method (EV_A))	1472	if (ev_backend (EV_A))
860	return loop;	1473	return loop;
861		1474
862	return 0;	1475	return 0;
863	}	1476	}
864		1477
…		…
870	}	1483	}
871		1484
872	void	1485	void
873	ev_loop_fork (EV_P)	1486	ev_loop_fork (EV_P)
874	{	1487	{
875	postfork = 1;	1488	postfork = 1; /* must be in line with ev_default_fork */
876	}	1489	}
877
878	#endif	1490	#endif
879		1491
880	#if EV_MULTIPLICITY	1492	#if EV_MULTIPLICITY
881	struct ev_loop *	1493	struct ev_loop *
		1494	ev_default_loop_init (unsigned int flags)
882	#else	1495	#else
883	int	1496	int
		1497	ev_default_loop (unsigned int flags)
884	#endif	1498	#endif
885	ev_default_loop (int methods)
886	{	1499	{
887	if (sigpipe [0] == sigpipe [1])
888	if (pipe (sigpipe))
889	return 0;
890
891	if (!default_loop)	1500	if (!ev_default_loop_ptr)
892	{	1501	{
893	#if EV_MULTIPLICITY	1502	#if EV_MULTIPLICITY
894	struct ev_loop *loop = default_loop = &default_loop_struct;	1503	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
895	#else	1504	#else
896	default_loop = 1;	1505	ev_default_loop_ptr = 1;
897	#endif	1506	#endif
898		1507
899	loop_init (EV_A_ methods);	1508	loop_init (EV_A_ flags);
900		1509
901	if (ev_method (EV_A))	1510	if (ev_backend (EV_A))
902	{	1511	{
903	siginit (EV_A);
904
905	#ifndef WIN32	1512	#ifndef _WIN32
906	ev_signal_init (&childev, childcb, SIGCHLD);	1513	ev_signal_init (&childev, childcb, SIGCHLD);
907	ev_set_priority (&childev, EV_MAXPRI);	1514	ev_set_priority (&childev, EV_MAXPRI);
908	ev_signal_start (EV_A_ &childev);	1515	ev_signal_start (EV_A_ &childev);
909	ev_unref (EV_A); /* child watcher should not keep loop alive */	1516	ev_unref (EV_A); /* child watcher should not keep loop alive */
910	#endif	1517	#endif
911	}	1518	}
912	else	1519	else
913	default_loop = 0;	1520	ev_default_loop_ptr = 0;
914	}	1521	}
915		1522
916	return default_loop;	1523	return ev_default_loop_ptr;
917	}	1524	}
918		1525
919	void	1526	void
920	ev_default_destroy (void)	1527	ev_default_destroy (void)
921	{	1528	{
922	#if EV_MULTIPLICITY	1529	#if EV_MULTIPLICITY
923	struct ev_loop *loop = default_loop;	1530	struct ev_loop *loop = ev_default_loop_ptr;
924	#endif	1531	#endif
925		1532
926	#ifndef WIN32	1533	#ifndef _WIN32
927	ev_ref (EV_A); /* child watcher */	1534	ev_ref (EV_A); /* child watcher */
928	ev_signal_stop (EV_A_ &childev);	1535	ev_signal_stop (EV_A_ &childev);
929	#endif	1536	#endif
930		1537
931	ev_ref (EV_A); /* signal watcher */
932	ev_io_stop (EV_A_ &sigev);
933
934	close (sigpipe [0]); sigpipe [0] = 0;
935	close (sigpipe [1]); sigpipe [1] = 0;
936
937	loop_destroy (EV_A);	1538	loop_destroy (EV_A);
938	}	1539	}
939		1540
940	void	1541	void
941	ev_default_fork (void)	1542	ev_default_fork (void)
942	{	1543	{
943	#if EV_MULTIPLICITY	1544	#if EV_MULTIPLICITY
944	struct ev_loop *loop = default_loop;	1545	struct ev_loop *loop = ev_default_loop_ptr;
945	#endif	1546	#endif
946		1547
947	if (method)	1548	if (backend)
948	postfork = 1;	1549	postfork = 1; /* must be in line with ev_loop_fork */
949	}	1550	}
950		1551
951	/*****************************************************************************/	1552	/*****************************************************************************/
952		1553
953	static int	1554	void
954	any_pending (EV_P)	1555	ev_invoke (EV_P_ void *w, int revents)
955	{	1556	{
956	int pri;	1557	EV_CB_INVOKE ((W)w, revents);
957
958	for (pri = NUMPRI; pri--; )
959	if (pendingcnt [pri])
960	return 1;
961
962	return 0;
963	}	1558	}
964		1559
965	static void	1560	void inline_speed
966	call_pending (EV_P)	1561	call_pending (EV_P)
967	{	1562	{
968	int pri;	1563	int pri;
969		1564
970	for (pri = NUMPRI; pri--; )	1565	for (pri = NUMPRI; pri--; )
971	while (pendingcnt [pri])	1566	while (pendingcnt [pri])
972	{	1567	{
973	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1568	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
974		1569
975	if (p->w)	1570	if (expect_true (p->w))
976	{	1571	{
		1572	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1573
977	p->w->pending = 0;	1574	p->w->pending = 0;
978	EV_CB_INVOKE (p->w, p->events);	1575	EV_CB_INVOKE (p->w, p->events);
979	}	1576	}
980	}	1577	}
981	}	1578	}
982		1579
983	static void	1580	#if EV_IDLE_ENABLE
		1581	void inline_size
		1582	idle_reify (EV_P)
		1583	{
		1584	if (expect_false (idleall))
		1585	{
		1586	int pri;
		1587
		1588	for (pri = NUMPRI; pri--; )
		1589	{
		1590	if (pendingcnt [pri])
		1591	break;
		1592
		1593	if (idlecnt [pri])
		1594	{
		1595	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1596	break;
		1597	}
		1598	}
		1599	}
		1600	}
		1601	#endif
		1602
		1603	void inline_size
984	timers_reify (EV_P)	1604	timers_reify (EV_P)
985	{	1605	{
986	while (timercnt && ((WT)timers [0])->at <= mn_now)	1606	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
987	{	1607	{
988	struct ev_timer *w = timers [0];	1608	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
989		1609
990	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1610	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
991		1611
992	/* first reschedule or stop timer */	1612	/* first reschedule or stop timer */
993	if (w->repeat)	1613	if (w->repeat)
994	{	1614	{
		1615	ev_at (w) += w->repeat;
		1616	if (ev_at (w) < mn_now)
		1617	ev_at (w) = mn_now;
		1618
995	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1619	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
996		1620
997	((WT)w)->at += w->repeat;	1621	ANHE_at_set (timers [HEAP0]);
998	if (((WT)w)->at < mn_now)
999	((WT)w)->at = mn_now;
1000
1001	downheap ((WT *)timers, timercnt, 0);	1622	downheap (timers, timercnt, HEAP0);
1002	}	1623	}
1003	else	1624	else
1004	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1625	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1005		1626
1006	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1627	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1007	}	1628	}
1008	}	1629	}
1009		1630
1010	#if EV_PERIODICS	1631	#if EV_PERIODIC_ENABLE
1011	static void	1632	void inline_size
1012	periodics_reify (EV_P)	1633	periodics_reify (EV_P)
1013	{	1634	{
1014	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1635	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1015	{	1636	{
1016	struct ev_periodic *w = periodics [0];	1637	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1017		1638
1018	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1639	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1019		1640
1020	/* first reschedule or stop timer */	1641	/* first reschedule or stop timer */
1021	if (w->reschedule_cb)	1642	if (w->reschedule_cb)
1022	{	1643	{
1023	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1644	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1024		1645
1025	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1646	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1647
		1648	ANHE_at_set (periodics [HEAP0]);
1026	downheap ((WT *)periodics, periodiccnt, 0);	1649	downheap (periodics, periodiccnt, HEAP0);
1027	}	1650	}
1028	else if (w->interval)	1651	else if (w->interval)
1029	{	1652	{
1030	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1653	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1031	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1654	/* if next trigger time is not sufficiently in the future, put it there */
		1655	/* this might happen because of floating point inexactness */
		1656	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1657	{
		1658	ev_at (w) += w->interval;
		1659
		1660	/* if interval is unreasonably low we might still have a time in the past */
		1661	/* so correct this. this will make the periodic very inexact, but the user */
		1662	/* has effectively asked to get triggered more often than possible */
		1663	if (ev_at (w) < ev_rt_now)
		1664	ev_at (w) = ev_rt_now;
		1665	}
		1666
		1667	ANHE_at_set (periodics [HEAP0]);
1032	downheap ((WT *)periodics, periodiccnt, 0);	1668	downheap (periodics, periodiccnt, HEAP0);
1033	}	1669	}
1034	else	1670	else
1035	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1671	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1036		1672
1037	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1673	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1038	}	1674	}
1039	}	1675	}
1040		1676
1041	static void	1677	static void noinline
1042	periodics_reschedule (EV_P)	1678	periodics_reschedule (EV_P)
1043	{	1679	{
1044	int i;	1680	int i;
1045		1681
1046	/* adjust periodics after time jump */	1682	/* adjust periodics after time jump */
		1683	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1684	{
		1685	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1686
		1687	if (w->reschedule_cb)
		1688	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1689	else if (w->interval)
		1690	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1691
		1692	ANHE_at_set (periodics [i]);
		1693	}
		1694
		1695	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1696	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
1047	for (i = 0; i < periodiccnt; ++i)	1697	for (i = 0; i < periodiccnt; ++i)
1048	{	1698	upheap (periodics, i + HEAP0);
1049	struct ev_periodic *w = periodics [i];	1699	}
		1700	#endif
1050		1701
1051	if (w->reschedule_cb)	1702	void inline_speed
1052	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1703	time_update (EV_P_ ev_tstamp max_block)
1053	else if (w->interval)	1704	{
1054	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1705	int i;
		1706
		1707	#if EV_USE_MONOTONIC
		1708	if (expect_true (have_monotonic))
1055	}	1709	{
		1710	ev_tstamp odiff = rtmn_diff;
1056		1711
1057	/* now rebuild the heap */
1058	for (i = periodiccnt >> 1; i--; )
1059	downheap ((WT *)periodics, periodiccnt, i);
1060	}
1061	#endif
1062
1063	inline int
1064	time_update_monotonic (EV_P)
1065	{
1066	mn_now = get_clock ();	1712	mn_now = get_clock ();
1067		1713
		1714	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1715	/* interpolate in the meantime */
1068	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1716	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1069	{	1717	{
1070	ev_rt_now = rtmn_diff + mn_now;	1718	ev_rt_now = rtmn_diff + mn_now;
1071	return 0;	1719	return;
1072	}	1720	}
1073	else	1721
1074	{
1075	now_floor = mn_now;	1722	now_floor = mn_now;
1076	ev_rt_now = ev_time ();	1723	ev_rt_now = ev_time ();
1077	return 1;
1078	}
1079	}
1080		1724
1081	static void	1725	/* loop a few times, before making important decisions.
1082	time_update (EV_P)	1726	* on the choice of "4": one iteration isn't enough,
1083	{	1727	* in case we get preempted during the calls to
1084	int i;	1728	* ev_time and get_clock. a second call is almost guaranteed
1085		1729	* to succeed in that case, though. and looping a few more times
1086	#if EV_USE_MONOTONIC	1730	* doesn't hurt either as we only do this on time-jumps or
1087	if (expect_true (have_monotonic))	1731	* in the unlikely event of having been preempted here.
1088	{	1732	*/
1089	if (time_update_monotonic (EV_A))	1733	for (i = 4; --i; )
1090	{	1734	{
1091	ev_tstamp odiff = rtmn_diff;	1735	rtmn_diff = ev_rt_now - mn_now;
1092		1736
1093	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1737	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1738	return; /* all is well */
		1739
		1740	ev_rt_now = ev_time ();
		1741	mn_now = get_clock ();
		1742	now_floor = mn_now;
		1743	}
		1744
		1745	# if EV_PERIODIC_ENABLE
		1746	periodics_reschedule (EV_A);
		1747	# endif
		1748	/* no timer adjustment, as the monotonic clock doesn't jump */
		1749	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1750	}
		1751	else
		1752	#endif
		1753	{
		1754	ev_rt_now = ev_time ();
		1755
		1756	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1757	{
		1758	#if EV_PERIODIC_ENABLE
		1759	periodics_reschedule (EV_A);
		1760	#endif
		1761	/* adjust timers. this is easy, as the offset is the same for all of them */
		1762	for (i = 0; i < timercnt; ++i)
1094	{	1763	{
1095	rtmn_diff = ev_rt_now - mn_now;	1764	ANHE *he = timers + i + HEAP0;
1096		1765	ANHE_w (*he)->at += ev_rt_now - mn_now;
1097	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1766	ANHE_at_set (*he);
1098	return; /* all is well */
1099
1100	ev_rt_now = ev_time ();
1101	mn_now = get_clock ();
1102	now_floor = mn_now;
1103	}	1767	}
1104
1105	# if EV_PERIODICS
1106	periodics_reschedule (EV_A);
1107	# endif
1108	/* no timer adjustment, as the monotonic clock doesn't jump */
1109	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1110	}	1768	}
1111	}
1112	else
1113	#endif
1114	{
1115	ev_rt_now = ev_time ();
1116
1117	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1118	{
1119	#if EV_PERIODICS
1120	periodics_reschedule (EV_A);
1121	#endif
1122
1123	/* adjust timers. this is easy, as the offset is the same for all */
1124	for (i = 0; i < timercnt; ++i)
1125	((WT)timers [i])->at += ev_rt_now - mn_now;
1126	}
1127		1769
1128	mn_now = ev_rt_now;	1770	mn_now = ev_rt_now;
1129	}	1771	}
1130	}	1772	}
1131		1773
…		…
1144	static int loop_done;	1786	static int loop_done;
1145		1787
1146	void	1788	void
1147	ev_loop (EV_P_ int flags)	1789	ev_loop (EV_P_ int flags)
1148	{	1790	{
1149	double block;	1791	loop_done = EVUNLOOP_CANCEL;
1150	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1792
		1793	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1151		1794
1152	do	1795	do
1153	{	1796	{
		1797	#ifndef _WIN32
		1798	if (expect_false (curpid)) /* penalise the forking check even more */
		1799	if (expect_false (getpid () != curpid))
		1800	{
		1801	curpid = getpid ();
		1802	postfork = 1;
		1803	}
		1804	#endif
		1805
		1806	#if EV_FORK_ENABLE
		1807	/* we might have forked, so queue fork handlers */
		1808	if (expect_false (postfork))
		1809	if (forkcnt)
		1810	{
		1811	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1812	call_pending (EV_A);
		1813	}
		1814	#endif
		1815
1154	/* queue check watchers (and execute them) */	1816	/* queue prepare watchers (and execute them) */
1155	if (expect_false (preparecnt))	1817	if (expect_false (preparecnt))
1156	{	1818	{
1157	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1819	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1158	call_pending (EV_A);	1820	call_pending (EV_A);
1159	}	1821	}
1160		1822
		1823	if (expect_false (!activecnt))
		1824	break;
		1825
1161	/* we might have forked, so reify kernel state if necessary */	1826	/* we might have forked, so reify kernel state if necessary */
1162	if (expect_false (postfork))	1827	if (expect_false (postfork))
1163	loop_fork (EV_A);	1828	loop_fork (EV_A);
1164		1829
1165	/* update fd-related kernel structures */	1830	/* update fd-related kernel structures */
1166	fd_reify (EV_A);	1831	fd_reify (EV_A);
1167		1832
1168	/* calculate blocking time */	1833	/* calculate blocking time */
		1834	{
		1835	ev_tstamp waittime = 0.;
		1836	ev_tstamp sleeptime = 0.;
1169		1837
1170	/* we only need this for !monotonic clock or timers, but as we basically	1838	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1171	always have timers, we just calculate it always */
1172	#if EV_USE_MONOTONIC
1173	if (expect_true (have_monotonic))
1174	time_update_monotonic (EV_A);
1175	else
1176	#endif
1177	{	1839	{
1178	ev_rt_now = ev_time ();	1840	/* update time to cancel out callback processing overhead */
1179	mn_now = ev_rt_now;	1841	time_update (EV_A_ 1e100);
1180	}
1181		1842
1182	if (flags & EVLOOP_NONBLOCK || idlecnt)
1183	block = 0.;
1184	else
1185	{
1186	block = MAX_BLOCKTIME;	1843	waittime = MAX_BLOCKTIME;
1187		1844
1188	if (timercnt)	1845	if (timercnt)
1189	{	1846	{
1190	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1847	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1191	if (block > to) block = to;	1848	if (waittime > to) waittime = to;
1192	}	1849	}
1193		1850
1194	#if EV_PERIODICS	1851	#if EV_PERIODIC_ENABLE
1195	if (periodiccnt)	1852	if (periodiccnt)
1196	{	1853	{
1197	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1854	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1198	if (block > to) block = to;	1855	if (waittime > to) waittime = to;
1199	}	1856	}
1200	#endif	1857	#endif
1201		1858
1202	if (block < 0.) block = 0.;	1859	if (expect_false (waittime < timeout_blocktime))
		1860	waittime = timeout_blocktime;
		1861
		1862	sleeptime = waittime - backend_fudge;
		1863
		1864	if (expect_true (sleeptime > io_blocktime))
		1865	sleeptime = io_blocktime;
		1866
		1867	if (sleeptime)
		1868	{
		1869	ev_sleep (sleeptime);
		1870	waittime -= sleeptime;
		1871	}
1203	}	1872	}
1204		1873
1205	method_poll (EV_A_ block);	1874	++loop_count;
		1875	backend_poll (EV_A_ waittime);
1206		1876
1207	/* update ev_rt_now, do magic */	1877	/* update ev_rt_now, do magic */
1208	time_update (EV_A);	1878	time_update (EV_A_ waittime + sleeptime);
		1879	}
1209		1880
1210	/* queue pending timers and reschedule them */	1881	/* queue pending timers and reschedule them */
1211	timers_reify (EV_A); /* relative timers called last */	1882	timers_reify (EV_A); /* relative timers called last */
1212	#if EV_PERIODICS	1883	#if EV_PERIODIC_ENABLE
1213	periodics_reify (EV_A); /* absolute timers called first */	1884	periodics_reify (EV_A); /* absolute timers called first */
1214	#endif	1885	#endif
1215		1886
		1887	#if EV_IDLE_ENABLE
1216	/* queue idle watchers unless io or timers are pending */	1888	/* queue idle watchers unless other events are pending */
1217	if (idlecnt && !any_pending (EV_A))	1889	idle_reify (EV_A);
1218	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1890	#endif
1219		1891
1220	/* queue check watchers, to be executed first */	1892	/* queue check watchers, to be executed first */
1221	if (checkcnt)	1893	if (expect_false (checkcnt))
1222	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1894	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1223		1895
1224	call_pending (EV_A);	1896	call_pending (EV_A);
1225	}	1897	}
1226	while (activecnt && !loop_done);	1898	while (expect_true (
		1899	activecnt
		1900	&& !loop_done
		1901	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1902	));
1227		1903
1228	if (loop_done != 2)	1904	if (loop_done == EVUNLOOP_ONE)
1229	loop_done = 0;	1905	loop_done = EVUNLOOP_CANCEL;
1230	}	1906	}
1231		1907
1232	void	1908	void
1233	ev_unloop (EV_P_ int how)	1909	ev_unloop (EV_P_ int how)
1234	{	1910	{
1235	loop_done = how;	1911	loop_done = how;
1236	}	1912	}
1237		1913
1238	/*****************************************************************************/	1914	/*****************************************************************************/
1239		1915
1240	inline void	1916	void inline_size
1241	wlist_add (WL *head, WL elem)	1917	wlist_add (WL *head, WL elem)
1242	{	1918	{
1243	elem->next = *head;	1919	elem->next = *head;
1244	*head = elem;	1920	*head = elem;
1245	}	1921	}
1246		1922
1247	inline void	1923	void inline_size
1248	wlist_del (WL *head, WL elem)	1924	wlist_del (WL *head, WL elem)
1249	{	1925	{
1250	while (*head)	1926	while (*head)
1251	{	1927	{
1252	if (*head == elem)	1928	if (*head == elem)
…		…
1257		1933
1258	head = &(*head)->next;	1934	head = &(*head)->next;
1259	}	1935	}
1260	}	1936	}
1261		1937
1262	inline void	1938	void inline_speed
1263	ev_clear_pending (EV_P_ W w)	1939	clear_pending (EV_P_ W w)
1264	{	1940	{
1265	if (w->pending)	1941	if (w->pending)
1266	{	1942	{
1267	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1943	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1268	w->pending = 0;	1944	w->pending = 0;
1269	}	1945	}
1270	}	1946	}
1271		1947
1272	inline void	1948	int
		1949	ev_clear_pending (EV_P_ void *w)
		1950	{
		1951	W w_ = (W)w;
		1952	int pending = w_->pending;
		1953
		1954	if (expect_true (pending))
		1955	{
		1956	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1957	w_->pending = 0;
		1958	p->w = 0;
		1959	return p->events;
		1960	}
		1961	else
		1962	return 0;
		1963	}
		1964
		1965	void inline_size
		1966	pri_adjust (EV_P_ W w)
		1967	{
		1968	int pri = w->priority;
		1969	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1970	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1971	w->priority = pri;
		1972	}
		1973
		1974	void inline_speed
1273	ev_start (EV_P_ W w, int active)	1975	ev_start (EV_P_ W w, int active)
1274	{	1976	{
1275	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1977	pri_adjust (EV_A_ w);
1276	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1277
1278	w->active = active;	1978	w->active = active;
1279	ev_ref (EV_A);	1979	ev_ref (EV_A);
1280	}	1980	}
1281		1981
1282	inline void	1982	void inline_size
1283	ev_stop (EV_P_ W w)	1983	ev_stop (EV_P_ W w)
1284	{	1984	{
1285	ev_unref (EV_A);	1985	ev_unref (EV_A);
1286	w->active = 0;	1986	w->active = 0;
1287	}	1987	}
1288		1988
1289	/*****************************************************************************/	1989	/*****************************************************************************/
1290		1990
1291	void	1991	void noinline
1292	ev_io_start (EV_P_ struct ev_io *w)	1992	ev_io_start (EV_P_ ev_io *w)
1293	{	1993	{
1294	int fd = w->fd;	1994	int fd = w->fd;
1295		1995
1296	if (ev_is_active (w))	1996	if (expect_false (ev_is_active (w)))
1297	return;	1997	return;
1298		1998
1299	assert (("ev_io_start called with negative fd", fd >= 0));	1999	assert (("ev_io_start called with negative fd", fd >= 0));
1300		2000
1301	ev_start (EV_A_ (W)w, 1);	2001	ev_start (EV_A_ (W)w, 1);
1302	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2002	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1303	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2003	wlist_add (&anfds[fd].head, (WL)w);
1304		2004
1305	fd_change (EV_A_ fd);	2005	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		2006	w->events &= ~EV_IOFDSET;
1306	}	2007	}
1307		2008
1308	void	2009	void noinline
1309	ev_io_stop (EV_P_ struct ev_io *w)	2010	ev_io_stop (EV_P_ ev_io *w)
1310	{	2011	{
1311	ev_clear_pending (EV_A_ (W)w);	2012	clear_pending (EV_A_ (W)w);
1312	if (!ev_is_active (w))	2013	if (expect_false (!ev_is_active (w)))
1313	return;	2014	return;
1314		2015
1315	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2016	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1316		2017
1317	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2018	wlist_del (&anfds[w->fd].head, (WL)w);
1318	ev_stop (EV_A_ (W)w);	2019	ev_stop (EV_A_ (W)w);
1319		2020
1320	fd_change (EV_A_ w->fd);	2021	fd_change (EV_A_ w->fd, 1);
1321	}	2022	}
1322		2023
1323	void	2024	void noinline
1324	ev_timer_start (EV_P_ struct ev_timer *w)	2025	ev_timer_start (EV_P_ ev_timer *w)
1325	{	2026	{
1326	if (ev_is_active (w))	2027	if (expect_false (ev_is_active (w)))
1327	return;	2028	return;
1328		2029
1329	((WT)w)->at += mn_now;	2030	ev_at (w) += mn_now;
1330		2031
1331	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2032	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1332		2033
1333	ev_start (EV_A_ (W)w, ++timercnt);	2034	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1334	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));	2035	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1335	timers [timercnt - 1] = w;	2036	ANHE_w (timers [ev_active (w)]) = (WT)w;
1336	upheap ((WT *)timers, timercnt - 1);	2037	ANHE_at_set (timers [ev_active (w)]);
		2038	upheap (timers, ev_active (w));
1337		2039
1338	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2040	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1339	}	2041	}
1340		2042
1341	void	2043	void noinline
1342	ev_timer_stop (EV_P_ struct ev_timer *w)	2044	ev_timer_stop (EV_P_ ev_timer *w)
1343	{	2045	{
1344	ev_clear_pending (EV_A_ (W)w);	2046	clear_pending (EV_A_ (W)w);
1345	if (!ev_is_active (w))	2047	if (expect_false (!ev_is_active (w)))
1346	return;	2048	return;
1347		2049
		2050	{
		2051	int active = ev_active (w);
		2052
1348	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2053	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1349		2054
1350	if (((W)w)->active < timercnt--)	2055	if (expect_true (active < timercnt + HEAP0 - 1))
1351	{	2056	{
1352	timers [((W)w)->active - 1] = timers [timercnt];	2057	timers [active] = timers [timercnt + HEAP0 - 1];
1353	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2058	adjustheap (timers, timercnt, active);
1354	}	2059	}
1355		2060
1356	((WT)w)->at -= mn_now;	2061	--timercnt;
		2062	}
		2063
		2064	ev_at (w) -= mn_now;
1357		2065
1358	ev_stop (EV_A_ (W)w);	2066	ev_stop (EV_A_ (W)w);
1359	}	2067	}
1360		2068
1361	void	2069	void noinline
1362	ev_timer_again (EV_P_ struct ev_timer *w)	2070	ev_timer_again (EV_P_ ev_timer *w)
1363	{	2071	{
1364	if (ev_is_active (w))	2072	if (ev_is_active (w))
1365	{	2073	{
1366	if (w->repeat)	2074	if (w->repeat)
1367	{	2075	{
1368	((WT)w)->at = mn_now + w->repeat;	2076	ev_at (w) = mn_now + w->repeat;
		2077	ANHE_at_set (timers [ev_active (w)]);
1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2078	adjustheap (timers, timercnt, ev_active (w));
1370	}	2079	}
1371	else	2080	else
1372	ev_timer_stop (EV_A_ w);	2081	ev_timer_stop (EV_A_ w);
1373	}	2082	}
1374	else if (w->repeat)	2083	else if (w->repeat)
		2084	{
		2085	ev_at (w) = w->repeat;
1375	ev_timer_start (EV_A_ w);	2086	ev_timer_start (EV_A_ w);
		2087	}
1376	}	2088	}
1377		2089
1378	#if EV_PERIODICS	2090	#if EV_PERIODIC_ENABLE
1379	void	2091	void noinline
1380	ev_periodic_start (EV_P_ struct ev_periodic *w)	2092	ev_periodic_start (EV_P_ ev_periodic *w)
1381	{	2093	{
1382	if (ev_is_active (w))	2094	if (expect_false (ev_is_active (w)))
1383	return;	2095	return;
1384		2096
1385	if (w->reschedule_cb)	2097	if (w->reschedule_cb)
1386	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2098	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1387	else if (w->interval)	2099	else if (w->interval)
1388	{	2100	{
1389	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2101	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1390	/* this formula differs from the one in periodic_reify because we do not always round up */	2102	/* this formula differs from the one in periodic_reify because we do not always round up */
1391	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2103	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1392	}	2104	}
		2105	else
		2106	ev_at (w) = w->offset;
1393		2107
1394	ev_start (EV_A_ (W)w, ++periodiccnt);	2108	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1395	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));	2109	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1396	periodics [periodiccnt - 1] = w;	2110	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1397	upheap ((WT *)periodics, periodiccnt - 1);	2111	ANHE_at_set (periodics [ev_active (w)]);
		2112	upheap (periodics, ev_active (w));
1398		2113
1399	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2114	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1400	}	2115	}
1401		2116
1402	void	2117	void noinline
1403	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2118	ev_periodic_stop (EV_P_ ev_periodic *w)
1404	{	2119	{
1405	ev_clear_pending (EV_A_ (W)w);	2120	clear_pending (EV_A_ (W)w);
1406	if (!ev_is_active (w))	2121	if (expect_false (!ev_is_active (w)))
1407	return;	2122	return;
1408		2123
		2124	{
		2125	int active = ev_active (w);
		2126
1409	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2127	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1410		2128
1411	if (((W)w)->active < periodiccnt--)	2129	if (expect_true (active < periodiccnt + HEAP0 - 1))
1412	{	2130	{
1413	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2131	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1414	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2132	adjustheap (periodics, periodiccnt, active);
1415	}	2133	}
		2134
		2135	--periodiccnt;
		2136	}
1416		2137
1417	ev_stop (EV_A_ (W)w);	2138	ev_stop (EV_A_ (W)w);
1418	}	2139	}
1419		2140
1420	void	2141	void noinline
1421	ev_periodic_again (EV_P_ struct ev_periodic *w)	2142	ev_periodic_again (EV_P_ ev_periodic *w)
1422	{	2143	{
1423	/* TODO: use adjustheap and recalculation */	2144	/* TODO: use adjustheap and recalculation */
1424	ev_periodic_stop (EV_A_ w);	2145	ev_periodic_stop (EV_A_ w);
1425	ev_periodic_start (EV_A_ w);	2146	ev_periodic_start (EV_A_ w);
1426	}	2147	}
1427	#endif	2148	#endif
1428		2149
1429	void
1430	ev_idle_start (EV_P_ struct ev_idle *w)
1431	{
1432	if (ev_is_active (w))
1433	return;
1434
1435	ev_start (EV_A_ (W)w, ++idlecnt);
1436	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1437	idles [idlecnt - 1] = w;
1438	}
1439
1440	void
1441	ev_idle_stop (EV_P_ struct ev_idle *w)
1442	{
1443	ev_clear_pending (EV_A_ (W)w);
1444	if (!ev_is_active (w))
1445	return;
1446
1447	idles [((W)w)->active - 1] = idles [--idlecnt];
1448	ev_stop (EV_A_ (W)w);
1449	}
1450
1451	void
1452	ev_prepare_start (EV_P_ struct ev_prepare *w)
1453	{
1454	if (ev_is_active (w))
1455	return;
1456
1457	ev_start (EV_A_ (W)w, ++preparecnt);
1458	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1459	prepares [preparecnt - 1] = w;
1460	}
1461
1462	void
1463	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1464	{
1465	ev_clear_pending (EV_A_ (W)w);
1466	if (!ev_is_active (w))
1467	return;
1468
1469	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1470	ev_stop (EV_A_ (W)w);
1471	}
1472
1473	void
1474	ev_check_start (EV_P_ struct ev_check *w)
1475	{
1476	if (ev_is_active (w))
1477	return;
1478
1479	ev_start (EV_A_ (W)w, ++checkcnt);
1480	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1481	checks [checkcnt - 1] = w;
1482	}
1483
1484	void
1485	ev_check_stop (EV_P_ struct ev_check *w)
1486	{
1487	ev_clear_pending (EV_A_ (W)w);
1488	if (!ev_is_active (w))
1489	return;
1490
1491	checks [((W)w)->active - 1] = checks [--checkcnt];
1492	ev_stop (EV_A_ (W)w);
1493	}
1494
1495	#ifndef SA_RESTART	2150	#ifndef SA_RESTART
1496	# define SA_RESTART 0	2151	# define SA_RESTART 0
1497	#endif	2152	#endif
1498		2153
1499	void	2154	void noinline
1500	ev_signal_start (EV_P_ struct ev_signal *w)	2155	ev_signal_start (EV_P_ ev_signal *w)
1501	{	2156	{
1502	#if EV_MULTIPLICITY	2157	#if EV_MULTIPLICITY
1503	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2158	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1504	#endif	2159	#endif
1505	if (ev_is_active (w))	2160	if (expect_false (ev_is_active (w)))
1506	return;	2161	return;
1507		2162
1508	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2163	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1509		2164
		2165	evpipe_init (EV_A);
		2166
		2167	{
		2168	#ifndef _WIN32
		2169	sigset_t full, prev;
		2170	sigfillset (&full);
		2171	sigprocmask (SIG_SETMASK, &full, &prev);
		2172	#endif
		2173
		2174	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2175
		2176	#ifndef _WIN32
		2177	sigprocmask (SIG_SETMASK, &prev, 0);
		2178	#endif
		2179	}
		2180
1510	ev_start (EV_A_ (W)w, 1);	2181	ev_start (EV_A_ (W)w, 1);
1511	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1512	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2182	wlist_add (&signals [w->signum - 1].head, (WL)w);
1513		2183
1514	if (!((WL)w)->next)	2184	if (!((WL)w)->next)
1515	{	2185	{
1516	#if WIN32	2186	#if _WIN32
1517	signal (w->signum, sighandler);	2187	signal (w->signum, ev_sighandler);
1518	#else	2188	#else
1519	struct sigaction sa;	2189	struct sigaction sa;
1520	sa.sa_handler = sighandler;	2190	sa.sa_handler = ev_sighandler;
1521	sigfillset (&sa.sa_mask);	2191	sigfillset (&sa.sa_mask);
1522	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2192	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1523	sigaction (w->signum, &sa, 0);	2193	sigaction (w->signum, &sa, 0);
1524	#endif	2194	#endif
1525	}	2195	}
1526	}	2196	}
1527		2197
1528	void	2198	void noinline
1529	ev_signal_stop (EV_P_ struct ev_signal *w)	2199	ev_signal_stop (EV_P_ ev_signal *w)
1530	{	2200	{
1531	ev_clear_pending (EV_A_ (W)w);	2201	clear_pending (EV_A_ (W)w);
1532	if (!ev_is_active (w))	2202	if (expect_false (!ev_is_active (w)))
1533	return;	2203	return;
1534		2204
1535	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2205	wlist_del (&signals [w->signum - 1].head, (WL)w);
1536	ev_stop (EV_A_ (W)w);	2206	ev_stop (EV_A_ (W)w);
1537		2207
1538	if (!signals [w->signum - 1].head)	2208	if (!signals [w->signum - 1].head)
1539	signal (w->signum, SIG_DFL);	2209	signal (w->signum, SIG_DFL);
1540	}	2210	}
1541		2211
1542	void	2212	void
1543	ev_child_start (EV_P_ struct ev_child *w)	2213	ev_child_start (EV_P_ ev_child *w)
1544	{	2214	{
1545	#if EV_MULTIPLICITY	2215	#if EV_MULTIPLICITY
1546	assert (("child watchers are only supported in the default loop", loop == default_loop));	2216	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1547	#endif	2217	#endif
1548	if (ev_is_active (w))	2218	if (expect_false (ev_is_active (w)))
1549	return;	2219	return;
1550		2220
1551	ev_start (EV_A_ (W)w, 1);	2221	ev_start (EV_A_ (W)w, 1);
1552	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2222	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1553	}	2223	}
1554		2224
1555	void	2225	void
1556	ev_child_stop (EV_P_ struct ev_child *w)	2226	ev_child_stop (EV_P_ ev_child *w)
1557	{	2227	{
1558	ev_clear_pending (EV_A_ (W)w);	2228	clear_pending (EV_A_ (W)w);
1559	if (!ev_is_active (w))	2229	if (expect_false (!ev_is_active (w)))
1560	return;	2230	return;
1561		2231
1562	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2232	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1563	ev_stop (EV_A_ (W)w);	2233	ev_stop (EV_A_ (W)w);
1564	}	2234	}
1565		2235
		2236	#if EV_STAT_ENABLE
		2237
		2238	# ifdef _WIN32
		2239	# undef lstat
		2240	# define lstat(a,b) _stati64 (a,b)
		2241	# endif
		2242
		2243	#define DEF_STAT_INTERVAL 5.0074891
		2244	#define MIN_STAT_INTERVAL 0.1074891
		2245
		2246	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2247
		2248	#if EV_USE_INOTIFY
		2249	# define EV_INOTIFY_BUFSIZE 8192
		2250
		2251	static void noinline
		2252	infy_add (EV_P_ ev_stat *w)
		2253	{
		2254	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);
		2255
		2256	if (w->wd < 0)
		2257	{
		2258	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2259
		2260	/* monitor some parent directory for speedup hints */
		2261	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2262	/* but an efficiency issue only */
		2263	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2264	{
		2265	char path [4096];
		2266	strcpy (path, w->path);
		2267
		2268	do
		2269	{
		2270	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2271	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2272
		2273	char *pend = strrchr (path, '/');
		2274
		2275	if (!pend)
		2276	break; /* whoops, no '/', complain to your admin */
		2277
		2278	*pend = 0;
		2279	w->wd = inotify_add_watch (fs_fd, path, mask);
		2280	}
		2281	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2282	}
		2283	}
		2284	else
		2285	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2286
		2287	if (w->wd >= 0)
		2288	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2289	}
		2290
		2291	static void noinline
		2292	infy_del (EV_P_ ev_stat *w)
		2293	{
		2294	int slot;
		2295	int wd = w->wd;
		2296
		2297	if (wd < 0)
		2298	return;
		2299
		2300	w->wd = -2;
		2301	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2302	wlist_del (&fs_hash [slot].head, (WL)w);
		2303
		2304	/* remove this watcher, if others are watching it, they will rearm */
		2305	inotify_rm_watch (fs_fd, wd);
		2306	}
		2307
		2308	static void noinline
		2309	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2310	{
		2311	if (slot < 0)
		2312	/* overflow, need to check for all hahs slots */
		2313	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2314	infy_wd (EV_A_ slot, wd, ev);
		2315	else
		2316	{
		2317	WL w_;
		2318
		2319	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2320	{
		2321	ev_stat *w = (ev_stat *)w_;
		2322	w_ = w_->next; /* lets us remove this watcher and all before it */
		2323
		2324	if (w->wd == wd || wd == -1)
		2325	{
		2326	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2327	{
		2328	w->wd = -1;
		2329	infy_add (EV_A_ w); /* re-add, no matter what */
		2330	}
		2331
		2332	stat_timer_cb (EV_A_ &w->timer, 0);
		2333	}
		2334	}
		2335	}
		2336	}
		2337
		2338	static void
		2339	infy_cb (EV_P_ ev_io *w, int revents)
		2340	{
		2341	char buf [EV_INOTIFY_BUFSIZE];
		2342	struct inotify_event *ev = (struct inotify_event *)buf;
		2343	int ofs;
		2344	int len = read (fs_fd, buf, sizeof (buf));
		2345
		2346	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2347	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2348	}
		2349
		2350	void inline_size
		2351	infy_init (EV_P)
		2352	{
		2353	if (fs_fd != -2)
		2354	return;
		2355
		2356	fs_fd = inotify_init ();
		2357
		2358	if (fs_fd >= 0)
		2359	{
		2360	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2361	ev_set_priority (&fs_w, EV_MAXPRI);
		2362	ev_io_start (EV_A_ &fs_w);
		2363	}
		2364	}
		2365
		2366	void inline_size
		2367	infy_fork (EV_P)
		2368	{
		2369	int slot;
		2370
		2371	if (fs_fd < 0)
		2372	return;
		2373
		2374	close (fs_fd);
		2375	fs_fd = inotify_init ();
		2376
		2377	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2378	{
		2379	WL w_ = fs_hash [slot].head;
		2380	fs_hash [slot].head = 0;
		2381
		2382	while (w_)
		2383	{
		2384	ev_stat *w = (ev_stat *)w_;
		2385	w_ = w_->next; /* lets us add this watcher */
		2386
		2387	w->wd = -1;
		2388
		2389	if (fs_fd >= 0)
		2390	infy_add (EV_A_ w); /* re-add, no matter what */
		2391	else
		2392	ev_timer_start (EV_A_ &w->timer);
		2393	}
		2394
		2395	}
		2396	}
		2397
		2398	#endif
		2399
		2400	void
		2401	ev_stat_stat (EV_P_ ev_stat *w)
		2402	{
		2403	if (lstat (w->path, &w->attr) < 0)
		2404	w->attr.st_nlink = 0;
		2405	else if (!w->attr.st_nlink)
		2406	w->attr.st_nlink = 1;
		2407	}
		2408
		2409	static void noinline
		2410	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2411	{
		2412	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2413
		2414	/* we copy this here each the time so that */
		2415	/* prev has the old value when the callback gets invoked */
		2416	w->prev = w->attr;
		2417	ev_stat_stat (EV_A_ w);
		2418
		2419	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2420	if (
		2421	w->prev.st_dev != w->attr.st_dev
		2422	|| w->prev.st_ino != w->attr.st_ino
		2423	|| w->prev.st_mode != w->attr.st_mode
		2424	|| w->prev.st_nlink != w->attr.st_nlink
		2425	|| w->prev.st_uid != w->attr.st_uid
		2426	|| w->prev.st_gid != w->attr.st_gid
		2427	|| w->prev.st_rdev != w->attr.st_rdev
		2428	|| w->prev.st_size != w->attr.st_size
		2429	|| w->prev.st_atime != w->attr.st_atime
		2430	|| w->prev.st_mtime != w->attr.st_mtime
		2431	|| w->prev.st_ctime != w->attr.st_ctime
		2432	) {
		2433	#if EV_USE_INOTIFY
		2434	infy_del (EV_A_ w);
		2435	infy_add (EV_A_ w);
		2436	ev_stat_stat (EV_A_ w); /* avoid race... */
		2437	#endif
		2438
		2439	ev_feed_event (EV_A_ w, EV_STAT);
		2440	}
		2441	}
		2442
		2443	void
		2444	ev_stat_start (EV_P_ ev_stat *w)
		2445	{
		2446	if (expect_false (ev_is_active (w)))
		2447	return;
		2448
		2449	/* since we use memcmp, we need to clear any padding data etc. */
		2450	memset (&w->prev, 0, sizeof (ev_statdata));
		2451	memset (&w->attr, 0, sizeof (ev_statdata));
		2452
		2453	ev_stat_stat (EV_A_ w);
		2454
		2455	if (w->interval < MIN_STAT_INTERVAL)
		2456	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2457
		2458	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2459	ev_set_priority (&w->timer, ev_priority (w));
		2460
		2461	#if EV_USE_INOTIFY
		2462	infy_init (EV_A);
		2463
		2464	if (fs_fd >= 0)
		2465	infy_add (EV_A_ w);
		2466	else
		2467	#endif
		2468	ev_timer_start (EV_A_ &w->timer);
		2469
		2470	ev_start (EV_A_ (W)w, 1);
		2471	}
		2472
		2473	void
		2474	ev_stat_stop (EV_P_ ev_stat *w)
		2475	{
		2476	clear_pending (EV_A_ (W)w);
		2477	if (expect_false (!ev_is_active (w)))
		2478	return;
		2479
		2480	#if EV_USE_INOTIFY
		2481	infy_del (EV_A_ w);
		2482	#endif
		2483	ev_timer_stop (EV_A_ &w->timer);
		2484
		2485	ev_stop (EV_A_ (W)w);
		2486	}
		2487	#endif
		2488
		2489	#if EV_IDLE_ENABLE
		2490	void
		2491	ev_idle_start (EV_P_ ev_idle *w)
		2492	{
		2493	if (expect_false (ev_is_active (w)))
		2494	return;
		2495
		2496	pri_adjust (EV_A_ (W)w);
		2497
		2498	{
		2499	int active = ++idlecnt [ABSPRI (w)];
		2500
		2501	++idleall;
		2502	ev_start (EV_A_ (W)w, active);
		2503
		2504	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2505	idles [ABSPRI (w)][active - 1] = w;
		2506	}
		2507	}
		2508
		2509	void
		2510	ev_idle_stop (EV_P_ ev_idle *w)
		2511	{
		2512	clear_pending (EV_A_ (W)w);
		2513	if (expect_false (!ev_is_active (w)))
		2514	return;
		2515
		2516	{
		2517	int active = ev_active (w);
		2518
		2519	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2520	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2521
		2522	ev_stop (EV_A_ (W)w);
		2523	--idleall;
		2524	}
		2525	}
		2526	#endif
		2527
		2528	void
		2529	ev_prepare_start (EV_P_ ev_prepare *w)
		2530	{
		2531	if (expect_false (ev_is_active (w)))
		2532	return;
		2533
		2534	ev_start (EV_A_ (W)w, ++preparecnt);
		2535	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2536	prepares [preparecnt - 1] = w;
		2537	}
		2538
		2539	void
		2540	ev_prepare_stop (EV_P_ ev_prepare *w)
		2541	{
		2542	clear_pending (EV_A_ (W)w);
		2543	if (expect_false (!ev_is_active (w)))
		2544	return;
		2545
		2546	{
		2547	int active = ev_active (w);
		2548
		2549	prepares [active - 1] = prepares [--preparecnt];
		2550	ev_active (prepares [active - 1]) = active;
		2551	}
		2552
		2553	ev_stop (EV_A_ (W)w);
		2554	}
		2555
		2556	void
		2557	ev_check_start (EV_P_ ev_check *w)
		2558	{
		2559	if (expect_false (ev_is_active (w)))
		2560	return;
		2561
		2562	ev_start (EV_A_ (W)w, ++checkcnt);
		2563	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2564	checks [checkcnt - 1] = w;
		2565	}
		2566
		2567	void
		2568	ev_check_stop (EV_P_ ev_check *w)
		2569	{
		2570	clear_pending (EV_A_ (W)w);
		2571	if (expect_false (!ev_is_active (w)))
		2572	return;
		2573
		2574	{
		2575	int active = ev_active (w);
		2576
		2577	checks [active - 1] = checks [--checkcnt];
		2578	ev_active (checks [active - 1]) = active;
		2579	}
		2580
		2581	ev_stop (EV_A_ (W)w);
		2582	}
		2583
		2584	#if EV_EMBED_ENABLE
		2585	void noinline
		2586	ev_embed_sweep (EV_P_ ev_embed *w)
		2587	{
		2588	ev_loop (w->other, EVLOOP_NONBLOCK);
		2589	}
		2590
		2591	static void
		2592	embed_io_cb (EV_P_ ev_io *io, int revents)
		2593	{
		2594	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2595
		2596	if (ev_cb (w))
		2597	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2598	else
		2599	ev_loop (w->other, EVLOOP_NONBLOCK);
		2600	}
		2601
		2602	static void
		2603	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2604	{
		2605	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2606
		2607	{
		2608	struct ev_loop *loop = w->other;
		2609
		2610	while (fdchangecnt)
		2611	{
		2612	fd_reify (EV_A);
		2613	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2614	}
		2615	}
		2616	}
		2617
		2618	#if 0
		2619	static void
		2620	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2621	{
		2622	ev_idle_stop (EV_A_ idle);
		2623	}
		2624	#endif
		2625
		2626	void
		2627	ev_embed_start (EV_P_ ev_embed *w)
		2628	{
		2629	if (expect_false (ev_is_active (w)))
		2630	return;
		2631
		2632	{
		2633	struct ev_loop *loop = w->other;
		2634	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2635	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2636	}
		2637
		2638	ev_set_priority (&w->io, ev_priority (w));
		2639	ev_io_start (EV_A_ &w->io);
		2640
		2641	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2642	ev_set_priority (&w->prepare, EV_MINPRI);
		2643	ev_prepare_start (EV_A_ &w->prepare);
		2644
		2645	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2646
		2647	ev_start (EV_A_ (W)w, 1);
		2648	}
		2649
		2650	void
		2651	ev_embed_stop (EV_P_ ev_embed *w)
		2652	{
		2653	clear_pending (EV_A_ (W)w);
		2654	if (expect_false (!ev_is_active (w)))
		2655	return;
		2656
		2657	ev_io_stop (EV_A_ &w->io);
		2658	ev_prepare_stop (EV_A_ &w->prepare);
		2659
		2660	ev_stop (EV_A_ (W)w);
		2661	}
		2662	#endif
		2663
		2664	#if EV_FORK_ENABLE
		2665	void
		2666	ev_fork_start (EV_P_ ev_fork *w)
		2667	{
		2668	if (expect_false (ev_is_active (w)))
		2669	return;
		2670
		2671	ev_start (EV_A_ (W)w, ++forkcnt);
		2672	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2673	forks [forkcnt - 1] = w;
		2674	}
		2675
		2676	void
		2677	ev_fork_stop (EV_P_ ev_fork *w)
		2678	{
		2679	clear_pending (EV_A_ (W)w);
		2680	if (expect_false (!ev_is_active (w)))
		2681	return;
		2682
		2683	{
		2684	int active = ev_active (w);
		2685
		2686	forks [active - 1] = forks [--forkcnt];
		2687	ev_active (forks [active - 1]) = active;
		2688	}
		2689
		2690	ev_stop (EV_A_ (W)w);
		2691	}
		2692	#endif
		2693
		2694	#if EV_ASYNC_ENABLE
		2695	void
		2696	ev_async_start (EV_P_ ev_async *w)
		2697	{
		2698	if (expect_false (ev_is_active (w)))
		2699	return;
		2700
		2701	evpipe_init (EV_A);
		2702
		2703	ev_start (EV_A_ (W)w, ++asynccnt);
		2704	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2705	asyncs [asynccnt - 1] = w;
		2706	}
		2707
		2708	void
		2709	ev_async_stop (EV_P_ ev_async *w)
		2710	{
		2711	clear_pending (EV_A_ (W)w);
		2712	if (expect_false (!ev_is_active (w)))
		2713	return;
		2714
		2715	{
		2716	int active = ev_active (w);
		2717
		2718	asyncs [active - 1] = asyncs [--asynccnt];
		2719	ev_active (asyncs [active - 1]) = active;
		2720	}
		2721
		2722	ev_stop (EV_A_ (W)w);
		2723	}
		2724
		2725	void
		2726	ev_async_send (EV_P_ ev_async *w)
		2727	{
		2728	w->sent = 1;
		2729	evpipe_write (EV_A_ &gotasync);
		2730	}
		2731	#endif
		2732
1566	/*****************************************************************************/	2733	/*****************************************************************************/
1567		2734
1568	struct ev_once	2735	struct ev_once
1569	{	2736	{
1570	struct ev_io io;	2737	ev_io io;
1571	struct ev_timer to;	2738	ev_timer to;
1572	void (*cb)(int revents, void *arg);	2739	void (*cb)(int revents, void *arg);
1573	void *arg;	2740	void *arg;
1574	};	2741	};
1575		2742
1576	static void	2743	static void
…		…
1585		2752
1586	cb (revents, arg);	2753	cb (revents, arg);
1587	}	2754	}
1588		2755
1589	static void	2756	static void
1590	once_cb_io (EV_P_ struct ev_io *w, int revents)	2757	once_cb_io (EV_P_ ev_io *w, int revents)
1591	{	2758	{
1592	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2759	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1593	}	2760	}
1594		2761
1595	static void	2762	static void
1596	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2763	once_cb_to (EV_P_ ev_timer *w, int revents)
1597	{	2764	{
1598	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2765	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1599	}	2766	}
1600		2767
1601	void	2768	void
1602	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2769	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1603	{	2770	{
1604	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));	2771	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1605		2772
1606	if (!once)	2773	if (expect_false (!once))
		2774	{
1607	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2775	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1608	else	2776	return;
1609	{	2777	}
		2778
1610	once->cb = cb;	2779	once->cb = cb;
1611	once->arg = arg;	2780	once->arg = arg;
1612		2781
1613	ev_init (&once->io, once_cb_io);	2782	ev_init (&once->io, once_cb_io);
1614	if (fd >= 0)	2783	if (fd >= 0)
1615	{	2784	{
1616	ev_io_set (&once->io, fd, events);	2785	ev_io_set (&once->io, fd, events);
1617	ev_io_start (EV_A_ &once->io);	2786	ev_io_start (EV_A_ &once->io);
1618	}	2787	}
1619		2788
1620	ev_init (&once->to, once_cb_to);	2789	ev_init (&once->to, once_cb_to);
1621	if (timeout >= 0.)	2790	if (timeout >= 0.)
1622	{	2791	{
1623	ev_timer_set (&once->to, timeout, 0.);	2792	ev_timer_set (&once->to, timeout, 0.);
1624	ev_timer_start (EV_A_ &once->to);	2793	ev_timer_start (EV_A_ &once->to);
1625	}
1626	}	2794	}
1627	}	2795	}
		2796
		2797	#if EV_MULTIPLICITY
		2798	#include "ev_wrap.h"
		2799	#endif
1628		2800
1629	#ifdef __cplusplus	2801	#ifdef __cplusplus
1630	}	2802	}
1631	#endif	2803	#endif
1632		2804

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