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Comparing libev/ev.c (file contents):
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC vs.
Revision 1.242 by root, Fri May 9 14:07:19 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
31	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# include "config.h"	49	# include "config.h"
		50	# endif
33		51
34	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
37	# endif	66	# endif
38		67
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
40	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
41	# endif	74	# endif
42		75
43	# if HAVE_POLL && HAVE_POLL_H	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
44	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
45	# endif	82	# endif
46		83
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
48	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
49	# endif	90	# endif
50		91
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
53	# endif	98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
54		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
55	#endif	132	#endif
56		133
57	#include <math.h>	134	#include <math.h>
58	#include <stdlib.h>	135	#include <stdlib.h>
59	#include <fcntl.h>	136	#include <fcntl.h>
…		…
64	#include <assert.h>	141	#include <assert.h>
65	#include <errno.h>	142	#include <errno.h>
66	#include <sys/types.h>	143	#include <sys/types.h>
67	#include <time.h>	144	#include <time.h>
68		145
69	#ifndef PERL
70	# include <signal.h>	146	#include <signal.h>
71	#endif
72		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
73	#ifndef WIN32	154	#ifndef _WIN32
74	# include <unistd.h>
75	# include <sys/time.h>	155	# include <sys/time.h>
76	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
77	#endif	163	# endif
78	/**/	164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
79		167
80	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
81	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
82	#endif	178	#endif
83		179
84	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
85	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
86	#endif	182	#endif
87		183
88	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
89	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
90	#endif	190	#endif
91		191
92	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
93	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
94	#endif	198	#endif
95		199
96	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
97	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
98	#endif	202	#endif
99		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
100	#ifndef EV_USE_WIN32	208	#ifndef EV_USE_INOTIFY
101	# ifdef WIN32	209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
102	# define EV_USE_WIN32 0 /* it does not exist, use select */
103	# undef EV_USE_SELECT
104	# define EV_USE_SELECT 1	210	# define EV_USE_INOTIFY 1
105	# else	211	# else
106	# define EV_USE_WIN32 0	212	# define EV_USE_INOTIFY 0
107	# endif	213	# endif
108	#endif	214	#endif
109		215
110	#ifndef EV_USE_REALTIME	216	#ifndef EV_PID_HASHSIZE
111	# define EV_USE_REALTIME 1	217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
112	#endif	221	# endif
		222	#endif
113		223
114	/**/	224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
115		241
116	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
117	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
118	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
119	#endif	245	#endif
…		…
121	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
122	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
123	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
124	#endif	250	#endif
125		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
126	/**/	283	/**/
127		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		294
128	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
129	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
130	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
131	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
132		298
133	#include "ev.h"
134
135	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
136	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
137	# define inline inline	301	# define noinline __attribute__ ((noinline))
138	#else	302	#else
139	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
140	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
141	#endif	308	#endif
142		309
143	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
144	#define expect_true(expr) expect ((expr) != 0, 1)	311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
145		319
146	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
147	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
148		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
149	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
150	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
151	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
152		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
153	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
154		338
155	#if WIN32	339	#ifdef _WIN32
156	/* note: the comment below could not be substantiated, but what would I care */	340	# include "ev_win32.c"
157	/* MSDN says this is required to handle SIGFPE */
158	volatile double SIGFPE_REQ = 0.0f;
159	#endif	341	#endif
160		342
161	/*****************************************************************************/	343	/*****************************************************************************/
162		344
163	static void (*syserr_cb)(const char *msg);	345	static void (*syserr_cb)(const char *msg);
164		346
		347	void
165	void ev_set_syserr_cb (void (*cb)(const char *msg))	348	ev_set_syserr_cb (void (*cb)(const char *msg))
166	{	349	{
167	syserr_cb = cb;	350	syserr_cb = cb;
168	}	351	}
169		352
170	static void	353	static void noinline
171	syserr (const char *msg)	354	syserr (const char *msg)
172	{	355	{
173	if (!msg)	356	if (!msg)
174	msg = "(libev) system error";	357	msg = "(libev) system error";
175		358
…		…
180	perror (msg);	363	perror (msg);
181	abort ();	364	abort ();
182	}	365	}
183	}	366	}
184		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
185	static void *(*alloc)(void *ptr, long size);	383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
186		384
		385	void
187	void ev_set_allocator (void *(*cb)(void *ptr, long size))	386	ev_set_allocator (void *(*cb)(void *ptr, long size))
188	{	387	{
189	alloc = cb;	388	alloc = cb;
190	}	389	}
191		390
192	static void *	391	inline_speed void *
193	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
194	{	393	{
195	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
196		395
197	if (!ptr && size)	396	if (!ptr && size)
198	{	397	{
199	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
200	abort ();	399	abort ();
…		…
211	typedef struct	410	typedef struct
212	{	411	{
213	WL head;	412	WL head;
214	unsigned char events;	413	unsigned char events;
215	unsigned char reify;	414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
216	} ANFD;	418	} ANFD;
217		419
218	typedef struct	420	typedef struct
219	{	421	{
220	W w;	422	W w;
221	int events;	423	int events;
222	} ANPENDING;	424	} ANPENDING;
223		425
		426	#if EV_USE_INOTIFY
		427	/* hash table entry per inotify-id */
		428	typedef struct
		429	{
		430	WL head;
		431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#define EV_HEAP_CACHE_AT 0
		436	#if EV_HEAP_CACHE_AT
		437	typedef struct {
		438	WT w;
		439	ev_tstamp at;
		440	} ANHE;
		441
		442	#define ANHE_w(he) (he).w /* access watcher, read-write */
		443	#define ANHE_at(he) (he).at /* access cached at, read-only */
		444	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		445	#else
		446	typedef WT ANHE;
		447
		448	#define ANHE_w(he) (he)
		449	#define ANHE_at(he) (he)->at
		450	#define ANHE_at_set(he)
		451	#endif
		452
224	#if EV_MULTIPLICITY	453	#if EV_MULTIPLICITY
225		454
226	struct ev_loop	455	struct ev_loop
227	{	456	{
		457	ev_tstamp ev_rt_now;
		458	#define ev_rt_now ((loop)->ev_rt_now)
228	# define VAR(name,decl) decl;	459	#define VAR(name,decl) decl;
229	# include "ev_vars.h"	460	#include "ev_vars.h"
230	};
231	# undef VAR	461	#undef VAR
		462	};
232	# include "ev_wrap.h"	463	#include "ev_wrap.h"
		464
		465	static struct ev_loop default_loop_struct;
		466	struct ev_loop *ev_default_loop_ptr;
233		467
234	#else	468	#else
235		469
		470	ev_tstamp ev_rt_now;
236	# define VAR(name,decl) static decl;	471	#define VAR(name,decl) static decl;
237	# include "ev_vars.h"	472	#include "ev_vars.h"
238	# undef VAR	473	#undef VAR
		474
		475	static int ev_default_loop_ptr;
239		476
240	#endif	477	#endif
241		478
242	/*****************************************************************************/	479	/*****************************************************************************/
243		480
244	inline ev_tstamp	481	ev_tstamp
245	ev_time (void)	482	ev_time (void)
246	{	483	{
247	#if EV_USE_REALTIME	484	#if EV_USE_REALTIME
248	struct timespec ts;	485	struct timespec ts;
249	clock_gettime (CLOCK_REALTIME, &ts);	486	clock_gettime (CLOCK_REALTIME, &ts);
…		…
253	gettimeofday (&tv, 0);	490	gettimeofday (&tv, 0);
254	return tv.tv_sec + tv.tv_usec * 1e-6;	491	return tv.tv_sec + tv.tv_usec * 1e-6;
255	#endif	492	#endif
256	}	493	}
257		494
258	inline ev_tstamp	495	ev_tstamp inline_size
259	get_clock (void)	496	get_clock (void)
260	{	497	{
261	#if EV_USE_MONOTONIC	498	#if EV_USE_MONOTONIC
262	if (expect_true (have_monotonic))	499	if (expect_true (have_monotonic))
263	{	500	{
…		…
268	#endif	505	#endif
269		506
270	return ev_time ();	507	return ev_time ();
271	}	508	}
272		509
		510	#if EV_MULTIPLICITY
273	ev_tstamp	511	ev_tstamp
274	ev_now (EV_P)	512	ev_now (EV_P)
275	{	513	{
276	return rt_now;	514	return ev_rt_now;
277	}	515	}
		516	#endif
278		517
279	#define array_roundsize(base,n) ((n) | 4 & ~3)	518	void
		519	ev_sleep (ev_tstamp delay)
		520	{
		521	if (delay > 0.)
		522	{
		523	#if EV_USE_NANOSLEEP
		524	struct timespec ts;
280		525
		526	ts.tv_sec = (time_t)delay;
		527	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		528
		529	nanosleep (&ts, 0);
		530	#elif defined(_WIN32)
		531	Sleep ((unsigned long)(delay * 1e3));
		532	#else
		533	struct timeval tv;
		534
		535	tv.tv_sec = (time_t)delay;
		536	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		537
		538	select (0, 0, 0, 0, &tv);
		539	#endif
		540	}
		541	}
		542
		543	/*****************************************************************************/
		544
		545	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		546
		547	int inline_size
		548	array_nextsize (int elem, int cur, int cnt)
		549	{
		550	int ncur = cur + 1;
		551
		552	do
		553	ncur <<= 1;
		554	while (cnt > ncur);
		555
		556	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		557	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		558	{
		559	ncur *= elem;
		560	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		561	ncur = ncur - sizeof (void *) * 4;
		562	ncur /= elem;
		563	}
		564
		565	return ncur;
		566	}
		567
		568	static noinline void *
		569	array_realloc (int elem, void *base, int *cur, int cnt)
		570	{
		571	*cur = array_nextsize (elem, *cur, cnt);
		572	return ev_realloc (base, elem * *cur);
		573	}
		574
281	#define array_needsize(base,cur,cnt,init) \	575	#define array_needsize(type,base,cur,cnt,init) \
282	if (expect_false ((cnt) > cur)) \	576	if (expect_false ((cnt) > (cur))) \
283	{ \	577	{ \
284	int newcnt = cur; \	578	int ocur_ = (cur); \
285	do \	579	(base) = (type *)array_realloc \
286	{ \	580	(sizeof (type), (base), &(cur), (cnt)); \
287	newcnt = array_roundsize (base, newcnt << 1); \	581	init ((base) + (ocur_), (cur) - ocur_); \
288	} \
289	while ((cnt) > newcnt); \
290	\
291	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
292	init (base + cur, newcnt - cur); \
293	cur = newcnt; \
294	}	582	}
295		583
		584	#if 0
296	#define array_slim(stem) \	585	#define array_slim(type,stem) \
297	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	586	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
298	{ \	587	{ \
299	stem ## max = array_roundsize (stem ## cnt >> 1); \	588	stem ## max = array_roundsize (stem ## cnt >> 1); \
300	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \	589	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
301	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	590	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
302	}	591	}
303		592	#endif
304	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
305	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
306	#define array_free_microshit(stem) \
307	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
308		593
309	#define array_free(stem, idx) \	594	#define array_free(stem, idx) \
310	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	595	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
311		596
312	/*****************************************************************************/	597	/*****************************************************************************/
313		598
314	static void	599	void noinline
		600	ev_feed_event (EV_P_ void *w, int revents)
		601	{
		602	W w_ = (W)w;
		603	int pri = ABSPRI (w_);
		604
		605	if (expect_false (w_->pending))
		606	pendings [pri][w_->pending - 1].events |= revents;
		607	else
		608	{
		609	w_->pending = ++pendingcnt [pri];
		610	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		611	pendings [pri][w_->pending - 1].w = w_;
		612	pendings [pri][w_->pending - 1].events = revents;
		613	}
		614	}
		615
		616	void inline_speed
		617	queue_events (EV_P_ W *events, int eventcnt, int type)
		618	{
		619	int i;
		620
		621	for (i = 0; i < eventcnt; ++i)
		622	ev_feed_event (EV_A_ events [i], type);
		623	}
		624
		625	/*****************************************************************************/
		626
		627	void inline_size
315	anfds_init (ANFD *base, int count)	628	anfds_init (ANFD *base, int count)
316	{	629	{
317	while (count--)	630	while (count--)
318	{	631	{
319	base->head = 0;	632	base->head = 0;
…		…
322		635
323	++base;	636	++base;
324	}	637	}
325	}	638	}
326		639
327	static void	640	void inline_speed
328	event (EV_P_ W w, int events)
329	{
330	if (w->pending)
331	{
332	pendings [ABSPRI (w)][w->pending - 1].events |= events;
333	return;
334	}
335
336	w->pending = ++pendingcnt [ABSPRI (w)];
337	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
338	pendings [ABSPRI (w)][w->pending - 1].w = w;
339	pendings [ABSPRI (w)][w->pending - 1].events = events;
340	}
341
342	static void
343	queue_events (EV_P_ W *events, int eventcnt, int type)
344	{
345	int i;
346
347	for (i = 0; i < eventcnt; ++i)
348	event (EV_A_ events [i], type);
349	}
350
351	static void
352	fd_event (EV_P_ int fd, int events)	641	fd_event (EV_P_ int fd, int revents)
353	{	642	{
354	ANFD *anfd = anfds + fd;	643	ANFD *anfd = anfds + fd;
355	struct ev_io *w;	644	ev_io *w;
356		645
357	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	646	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
358	{	647	{
359	int ev = w->events & events;	648	int ev = w->events & revents;
360		649
361	if (ev)	650	if (ev)
362	event (EV_A_ (W)w, ev);	651	ev_feed_event (EV_A_ (W)w, ev);
363	}	652	}
364	}	653	}
365		654
366	/*****************************************************************************/	655	void
		656	ev_feed_fd_event (EV_P_ int fd, int revents)
		657	{
		658	if (fd >= 0 && fd < anfdmax)
		659	fd_event (EV_A_ fd, revents);
		660	}
367		661
368	static void	662	void inline_size
369	fd_reify (EV_P)	663	fd_reify (EV_P)
370	{	664	{
371	int i;	665	int i;
372		666
373	for (i = 0; i < fdchangecnt; ++i)	667	for (i = 0; i < fdchangecnt; ++i)
374	{	668	{
375	int fd = fdchanges [i];	669	int fd = fdchanges [i];
376	ANFD *anfd = anfds + fd;	670	ANFD *anfd = anfds + fd;
377	struct ev_io *w;	671	ev_io *w;
378		672
379	int events = 0;	673	unsigned char events = 0;
380		674
381	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	675	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
382	events |= w->events;	676	events |= (unsigned char)w->events;
383		677
		678	#if EV_SELECT_IS_WINSOCKET
		679	if (events)
		680	{
		681	unsigned long argp;
		682	#ifdef EV_FD_TO_WIN32_HANDLE
		683	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		684	#else
		685	anfd->handle = _get_osfhandle (fd);
		686	#endif
		687	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		688	}
		689	#endif
		690
		691	{
		692	unsigned char o_events = anfd->events;
		693	unsigned char o_reify = anfd->reify;
		694
384	anfd->reify = 0;	695	anfd->reify = 0;
385
386	method_modify (EV_A_ fd, anfd->events, events);
387	anfd->events = events;	696	anfd->events = events;
		697
		698	if (o_events != events || o_reify & EV_IOFDSET)
		699	backend_modify (EV_A_ fd, o_events, events);
		700	}
388	}	701	}
389		702
390	fdchangecnt = 0;	703	fdchangecnt = 0;
391	}	704	}
392		705
393	static void	706	void inline_size
394	fd_change (EV_P_ int fd)	707	fd_change (EV_P_ int fd, int flags)
395	{	708	{
396	if (anfds [fd].reify)	709	unsigned char reify = anfds [fd].reify;
397	return;
398
399	anfds [fd].reify = 1;	710	anfds [fd].reify |= flags;
400		711
		712	if (expect_true (!reify))
		713	{
401	++fdchangecnt;	714	++fdchangecnt;
402	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));	715	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
403	fdchanges [fdchangecnt - 1] = fd;	716	fdchanges [fdchangecnt - 1] = fd;
		717	}
404	}	718	}
405		719
406	static void	720	void inline_speed
407	fd_kill (EV_P_ int fd)	721	fd_kill (EV_P_ int fd)
408	{	722	{
409	struct ev_io *w;	723	ev_io *w;
410		724
411	while ((w = (struct ev_io *)anfds [fd].head))	725	while ((w = (ev_io *)anfds [fd].head))
412	{	726	{
413	ev_io_stop (EV_A_ w);	727	ev_io_stop (EV_A_ w);
414	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	728	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
415	}	729	}
416	}	730	}
417		731
418	static int	732	int inline_size
419	fd_valid (int fd)	733	fd_valid (int fd)
420	{	734	{
421	#ifdef WIN32	735	#ifdef _WIN32
422	return !!win32_get_osfhandle (fd);	736	return _get_osfhandle (fd) != -1;
423	#else	737	#else
424	return fcntl (fd, F_GETFD) != -1;	738	return fcntl (fd, F_GETFD) != -1;
425	#endif	739	#endif
426	}	740	}
427		741
428	/* called on EBADF to verify fds */	742	/* called on EBADF to verify fds */
429	static void	743	static void noinline
430	fd_ebadf (EV_P)	744	fd_ebadf (EV_P)
431	{	745	{
432	int fd;	746	int fd;
433		747
434	for (fd = 0; fd < anfdmax; ++fd)	748	for (fd = 0; fd < anfdmax; ++fd)
…		…
436	if (!fd_valid (fd) == -1 && errno == EBADF)	750	if (!fd_valid (fd) == -1 && errno == EBADF)
437	fd_kill (EV_A_ fd);	751	fd_kill (EV_A_ fd);
438	}	752	}
439		753
440	/* called on ENOMEM in select/poll to kill some fds and retry */	754	/* called on ENOMEM in select/poll to kill some fds and retry */
441	static void	755	static void noinline
442	fd_enomem (EV_P)	756	fd_enomem (EV_P)
443	{	757	{
444	int fd;	758	int fd;
445		759
446	for (fd = anfdmax; fd--; )	760	for (fd = anfdmax; fd--; )
…		…
449	fd_kill (EV_A_ fd);	763	fd_kill (EV_A_ fd);
450	return;	764	return;
451	}	765	}
452	}	766	}
453		767
454	/* usually called after fork if method needs to re-arm all fds from scratch */	768	/* usually called after fork if backend needs to re-arm all fds from scratch */
455	static void	769	static void noinline
456	fd_rearm_all (EV_P)	770	fd_rearm_all (EV_P)
457	{	771	{
458	int fd;	772	int fd;
459		773
460	/* this should be highly optimised to not do anything but set a flag */
461	for (fd = 0; fd < anfdmax; ++fd)	774	for (fd = 0; fd < anfdmax; ++fd)
462	if (anfds [fd].events)	775	if (anfds [fd].events)
463	{	776	{
464	anfds [fd].events = 0;	777	anfds [fd].events = 0;
465	fd_change (EV_A_ fd);	778	fd_change (EV_A_ fd, EV_IOFDSET | 1);
466	}	779	}
467	}	780	}
468		781
469	/*****************************************************************************/	782	/*****************************************************************************/
470		783
471	static void	784	/*
		785	* the heap functions want a real array index. array index 0 uis guaranteed to not
		786	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		787	* the branching factor of the d-tree.
		788	*/
		789
		790	/*
		791	* at the moment we allow libev the luxury of two heaps,
		792	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		793	* which is more cache-efficient.
		794	* the difference is about 5% with 50000+ watchers.
		795	*/
		796	#define EV_USE_4HEAP !EV_MINIMAL
		797	#if EV_USE_4HEAP
		798
		799	#define DHEAP 4
		800	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		801
		802	/* towards the root */
		803	void inline_speed
472	upheap (WT *heap, int k)	804	upheap (ANHE *heap, int k)
473	{	805	{
474	WT w = heap [k];	806	ANHE he = heap [k];
475		807
476	while (k && heap [k >> 1]->at > w->at)	808	for (;;)
477	{	809	{
		810	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		811
		812	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
		813	break;
		814
478	heap [k] = heap [k >> 1];	815	heap [k] = heap [p];
479	((W)heap [k])->active = k + 1;	816	ev_active (ANHE_w (heap [k])) = k;
480	k >>= 1;	817	k = p;
		818	}
		819
		820	ev_active (ANHE_w (he)) = k;
		821	heap [k] = he;
		822	}
		823
		824	/* away from the root */
		825	void inline_speed
		826	downheap (ANHE *heap, int N, int k)
		827	{
		828	ANHE he = heap [k];
		829	ANHE *E = heap + N + HEAP0;
		830
		831	for (;;)
		832	{
		833	ev_tstamp minat;
		834	ANHE *minpos;
		835	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		836
		837	// find minimum child
		838	if (expect_true (pos + DHEAP - 1 < E))
		839	{
		840	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		841	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		843	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		844	}
		845	else if (pos < E)
		846	{
		847	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		848	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		849	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		850	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		851	}
		852	else
		853	break;
		854
		855	if (ANHE_at (he) <= minat)
		856	break;
		857
		858	ev_active (ANHE_w (*minpos)) = k;
		859	heap [k] = *minpos;
		860
		861	k = minpos - heap;
		862	}
		863
		864	ev_active (ANHE_w (he)) = k;
		865	heap [k] = he;
		866	}
		867
		868	#else // 4HEAP
		869
		870	#define HEAP0 1
		871
		872	/* towards the root */
		873	void inline_speed
		874	upheap (ANHE *heap, int k)
		875	{
		876	ANHE he = heap [k];
		877
		878	for (;;)
		879	{
		880	int p = k >> 1;
		881
		882	/* maybe we could use a dummy element at heap [0]? */
		883	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		884	break;
		885
		886	heap [k] = heap [p];
		887	ev_active (ANHE_w (heap [k])) = k;
		888	k = p;
481	}	889	}
482		890
483	heap [k] = w;	891	heap [k] = w;
484	((W)heap [k])->active = k + 1;	892	ev_active (ANHE_w (heap [k])) = k;
485
486	}	893	}
487		894
488	static void	895	/* away from the root */
		896	void inline_speed
489	downheap (WT *heap, int N, int k)	897	downheap (ANHE *heap, int N, int k)
490	{	898	{
491	WT w = heap [k];	899	ANHE he = heap [k];
492		900
493	while (k < (N >> 1))	901	for (;;)
494	{	902	{
495	int j = k << 1;	903	int c = k << 1;
496		904
497	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	905	if (c > N)
498	++j;
499
500	if (w->at <= heap [j]->at)
501	break;	906	break;
502		907
		908	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		909	? 1 : 0;
		910
		911	if (w->at <= ANHE_at (heap [c]))
		912	break;
		913
503	heap [k] = heap [j];	914	heap [k] = heap [c];
504	((W)heap [k])->active = k + 1;	915	ev_active (ANHE_w (heap [k])) = k;
		916
505	k = j;	917	k = c;
506	}	918	}
507		919
508	heap [k] = w;	920	heap [k] = he;
509	((W)heap [k])->active = k + 1;	921	ev_active (ANHE_w (he)) = k;
		922	}
		923	#endif
		924
		925	void inline_size
		926	adjustheap (ANHE *heap, int N, int k)
		927	{
		928	upheap (heap, k);
		929	downheap (heap, N, k);
510	}	930	}
511		931
512	/*****************************************************************************/	932	/*****************************************************************************/
513		933
514	typedef struct	934	typedef struct
515	{	935	{
516	WL head;	936	WL head;
517	sig_atomic_t volatile gotsig;	937	EV_ATOMIC_T gotsig;
518	} ANSIG;	938	} ANSIG;
519		939
520	static ANSIG *signals;	940	static ANSIG *signals;
521	static int signalmax;	941	static int signalmax;
522		942
523	static int sigpipe [2];	943	static EV_ATOMIC_T gotsig;
524	static sig_atomic_t volatile gotsig;
525	static struct ev_io sigev;
526		944
527	static void	945	void inline_size
528	signals_init (ANSIG *base, int count)	946	signals_init (ANSIG *base, int count)
529	{	947	{
530	while (count--)	948	while (count--)
531	{	949	{
532	base->head = 0;	950	base->head = 0;
…		…
534		952
535	++base;	953	++base;
536	}	954	}
537	}	955	}
538		956
		957	/*****************************************************************************/
		958
		959	void inline_speed
		960	fd_intern (int fd)
		961	{
		962	#ifdef _WIN32
		963	int arg = 1;
		964	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		965	#else
		966	fcntl (fd, F_SETFD, FD_CLOEXEC);
		967	fcntl (fd, F_SETFL, O_NONBLOCK);
		968	#endif
		969	}
		970
		971	static void noinline
		972	evpipe_init (EV_P)
		973	{
		974	if (!ev_is_active (&pipeev))
		975	{
		976	#if EV_USE_EVENTFD
		977	if ((evfd = eventfd (0, 0)) >= 0)
		978	{
		979	evpipe [0] = -1;
		980	fd_intern (evfd);
		981	ev_io_set (&pipeev, evfd, EV_READ);
		982	}
		983	else
		984	#endif
		985	{
		986	while (pipe (evpipe))
		987	syserr ("(libev) error creating signal/async pipe");
		988
		989	fd_intern (evpipe [0]);
		990	fd_intern (evpipe [1]);
		991	ev_io_set (&pipeev, evpipe [0], EV_READ);
		992	}
		993
		994	ev_io_start (EV_A_ &pipeev);
		995	ev_unref (EV_A); /* watcher should not keep loop alive */
		996	}
		997	}
		998
		999	void inline_size
		1000	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1001	{
		1002	if (!*flag)
		1003	{
		1004	int old_errno = errno; /* save errno because write might clobber it */
		1005
		1006	*flag = 1;
		1007
		1008	#if EV_USE_EVENTFD
		1009	if (evfd >= 0)
		1010	{
		1011	uint64_t counter = 1;
		1012	write (evfd, &counter, sizeof (uint64_t));
		1013	}
		1014	else
		1015	#endif
		1016	write (evpipe [1], &old_errno, 1);
		1017
		1018	errno = old_errno;
		1019	}
		1020	}
		1021
539	static void	1022	static void
		1023	pipecb (EV_P_ ev_io *iow, int revents)
		1024	{
		1025	#if EV_USE_EVENTFD
		1026	if (evfd >= 0)
		1027	{
		1028	uint64_t counter;
		1029	read (evfd, &counter, sizeof (uint64_t));
		1030	}
		1031	else
		1032	#endif
		1033	{
		1034	char dummy;
		1035	read (evpipe [0], &dummy, 1);
		1036	}
		1037
		1038	if (gotsig && ev_is_default_loop (EV_A))
		1039	{
		1040	int signum;
		1041	gotsig = 0;
		1042
		1043	for (signum = signalmax; signum--; )
		1044	if (signals [signum].gotsig)
		1045	ev_feed_signal_event (EV_A_ signum + 1);
		1046	}
		1047
		1048	#if EV_ASYNC_ENABLE
		1049	if (gotasync)
		1050	{
		1051	int i;
		1052	gotasync = 0;
		1053
		1054	for (i = asynccnt; i--; )
		1055	if (asyncs [i]->sent)
		1056	{
		1057	asyncs [i]->sent = 0;
		1058	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1059	}
		1060	}
		1061	#endif
		1062	}
		1063
		1064	/*****************************************************************************/
		1065
		1066	static void
540	sighandler (int signum)	1067	ev_sighandler (int signum)
541	{	1068	{
		1069	#if EV_MULTIPLICITY
		1070	struct ev_loop *loop = &default_loop_struct;
		1071	#endif
		1072
542	#if WIN32	1073	#if _WIN32
543	signal (signum, sighandler);	1074	signal (signum, ev_sighandler);
544	#endif	1075	#endif
545		1076
546	signals [signum - 1].gotsig = 1;	1077	signals [signum - 1].gotsig = 1;
547		1078	evpipe_write (EV_A_ &gotsig);
548	if (!gotsig)
549	{
550	int old_errno = errno;
551	gotsig = 1;
552	write (sigpipe [1], &signum, 1);
553	errno = old_errno;
554	}
555	}	1079	}
556		1080
557	static void	1081	void noinline
558	sigcb (EV_P_ struct ev_io *iow, int revents)	1082	ev_feed_signal_event (EV_P_ int signum)
559	{	1083	{
560	WL w;	1084	WL w;
		1085
		1086	#if EV_MULTIPLICITY
		1087	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1088	#endif
		1089
561	int signum;	1090	--signum;
562		1091
563	read (sigpipe [0], &revents, 1);	1092	if (signum < 0 || signum >= signalmax)
564	gotsig = 0;	1093	return;
565		1094
566	for (signum = signalmax; signum--; )
567	if (signals [signum].gotsig)
568	{
569	signals [signum].gotsig = 0;	1095	signals [signum].gotsig = 0;
570		1096
571	for (w = signals [signum].head; w; w = w->next)	1097	for (w = signals [signum].head; w; w = w->next)
572	event (EV_A_ (W)w, EV_SIGNAL);	1098	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
573	}
574	}
575
576	static void
577	siginit (EV_P)
578	{
579	#ifndef WIN32
580	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
581	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
582
583	/* rather than sort out wether we really need nb, set it */
584	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
585	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
586	#endif
587
588	ev_io_set (&sigev, sigpipe [0], EV_READ);
589	ev_io_start (EV_A_ &sigev);
590	ev_unref (EV_A); /* child watcher should not keep loop alive */
591	}	1099	}
592		1100
593	/*****************************************************************************/	1101	/*****************************************************************************/
594		1102
595	static struct ev_child *childs [PID_HASHSIZE];	1103	static WL childs [EV_PID_HASHSIZE];
596		1104
597	#ifndef WIN32	1105	#ifndef _WIN32
598		1106
599	static struct ev_signal childev;	1107	static ev_signal childev;
		1108
		1109	#ifndef WIFCONTINUED
		1110	# define WIFCONTINUED(status) 0
		1111	#endif
		1112
		1113	void inline_speed
		1114	child_reap (EV_P_ int chain, int pid, int status)
		1115	{
		1116	ev_child *w;
		1117	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1118
		1119	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1120	{
		1121	if ((w->pid == pid || !w->pid)
		1122	&& (!traced || (w->flags & 1)))
		1123	{
		1124	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1125	w->rpid = pid;
		1126	w->rstatus = status;
		1127	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1128	}
		1129	}
		1130	}
600		1131
601	#ifndef WCONTINUED	1132	#ifndef WCONTINUED
602	# define WCONTINUED 0	1133	# define WCONTINUED 0
603	#endif	1134	#endif
604		1135
605	static void	1136	static void
606	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
607	{
608	struct ev_child *w;
609
610	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
611	if (w->pid == pid || !w->pid)
612	{
613	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
614	w->rpid = pid;
615	w->rstatus = status;
616	event (EV_A_ (W)w, EV_CHILD);
617	}
618	}
619
620	static void
621	childcb (EV_P_ struct ev_signal *sw, int revents)	1137	childcb (EV_P_ ev_signal *sw, int revents)
622	{	1138	{
623	int pid, status;	1139	int pid, status;
624		1140
		1141	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
625	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1142	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
626	{	1143	if (!WCONTINUED
		1144	|| errno != EINVAL
		1145	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1146	return;
		1147
627	/* make sure we are called again until all childs have been reaped */	1148	/* make sure we are called again until all children have been reaped */
		1149	/* we need to do it this way so that the callback gets called before we continue */
628	event (EV_A_ (W)sw, EV_SIGNAL);	1150	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
629		1151
630	child_reap (EV_A_ sw, pid, pid, status);	1152	child_reap (EV_A_ pid, pid, status);
		1153	if (EV_PID_HASHSIZE > 1)
631	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1154	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
632	}
633	}	1155	}
634		1156
635	#endif	1157	#endif
636		1158
637	/*****************************************************************************/	1159	/*****************************************************************************/
638		1160
		1161	#if EV_USE_PORT
		1162	# include "ev_port.c"
		1163	#endif
639	#if EV_USE_KQUEUE	1164	#if EV_USE_KQUEUE
640	# include "ev_kqueue.c"	1165	# include "ev_kqueue.c"
641	#endif	1166	#endif
642	#if EV_USE_EPOLL	1167	#if EV_USE_EPOLL
643	# include "ev_epoll.c"	1168	# include "ev_epoll.c"
…		…
660	{	1185	{
661	return EV_VERSION_MINOR;	1186	return EV_VERSION_MINOR;
662	}	1187	}
663		1188
664	/* return true if we are running with elevated privileges and should ignore env variables */	1189	/* return true if we are running with elevated privileges and should ignore env variables */
665	static int	1190	int inline_size
666	enable_secure (void)	1191	enable_secure (void)
667	{	1192	{
668	#ifdef WIN32	1193	#ifdef _WIN32
669	return 0;	1194	return 0;
670	#else	1195	#else
671	return getuid () != geteuid ()	1196	return getuid () != geteuid ()
672	|| getgid () != getegid ();	1197	|| getgid () != getegid ();
673	#endif	1198	#endif
674	}	1199	}
675		1200
676	int	1201	unsigned int
677	ev_method (EV_P)	1202	ev_supported_backends (void)
678	{	1203	{
679	return method;	1204	unsigned int flags = 0;
680	}
681		1205
682	static void	1206	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
683	loop_init (EV_P_ int methods)	1207	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1208	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1209	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1210	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1211
		1212	return flags;
		1213	}
		1214
		1215	unsigned int
		1216	ev_recommended_backends (void)
684	{	1217	{
685	if (!method)	1218	unsigned int flags = ev_supported_backends ();
		1219
		1220	#ifndef __NetBSD__
		1221	/* kqueue is borked on everything but netbsd apparently */
		1222	/* it usually doesn't work correctly on anything but sockets and pipes */
		1223	flags &= ~EVBACKEND_KQUEUE;
		1224	#endif
		1225	#ifdef __APPLE__
		1226	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1227	flags &= ~EVBACKEND_POLL;
		1228	#endif
		1229
		1230	return flags;
		1231	}
		1232
		1233	unsigned int
		1234	ev_embeddable_backends (void)
		1235	{
		1236	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1237
		1238	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1239	/* please fix it and tell me how to detect the fix */
		1240	flags &= ~EVBACKEND_EPOLL;
		1241
		1242	return flags;
		1243	}
		1244
		1245	unsigned int
		1246	ev_backend (EV_P)
		1247	{
		1248	return backend;
		1249	}
		1250
		1251	unsigned int
		1252	ev_loop_count (EV_P)
		1253	{
		1254	return loop_count;
		1255	}
		1256
		1257	void
		1258	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1259	{
		1260	io_blocktime = interval;
		1261	}
		1262
		1263	void
		1264	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	timeout_blocktime = interval;
		1267	}
		1268
		1269	static void noinline
		1270	loop_init (EV_P_ unsigned int flags)
		1271	{
		1272	if (!backend)
686	{	1273	{
687	#if EV_USE_MONOTONIC	1274	#if EV_USE_MONOTONIC
688	{	1275	{
689	struct timespec ts;	1276	struct timespec ts;
690	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1277	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
691	have_monotonic = 1;	1278	have_monotonic = 1;
692	}	1279	}
693	#endif	1280	#endif
694		1281
695	rt_now = ev_time ();	1282	ev_rt_now = ev_time ();
696	mn_now = get_clock ();	1283	mn_now = get_clock ();
697	now_floor = mn_now;	1284	now_floor = mn_now;
698	rtmn_diff = rt_now - mn_now;	1285	rtmn_diff = ev_rt_now - mn_now;
699		1286
700	if (methods == EVMETHOD_AUTO)	1287	io_blocktime = 0.;
701	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1288	timeout_blocktime = 0.;
		1289	backend = 0;
		1290	backend_fd = -1;
		1291	gotasync = 0;
		1292	#if EV_USE_INOTIFY
		1293	fs_fd = -2;
		1294	#endif
		1295
		1296	/* pid check not overridable via env */
		1297	#ifndef _WIN32
		1298	if (flags & EVFLAG_FORKCHECK)
		1299	curpid = getpid ();
		1300	#endif
		1301
		1302	if (!(flags & EVFLAG_NOENV)
		1303	&& !enable_secure ()
		1304	&& getenv ("LIBEV_FLAGS"))
702	methods = atoi (getenv ("LIBEV_METHODS"));	1305	flags = atoi (getenv ("LIBEV_FLAGS"));
703	else
704	methods = EVMETHOD_ANY;
705		1306
706	method = 0;	1307	if (!(flags & 0x0000ffffU))
707	#if EV_USE_WIN32	1308	flags |= ev_recommended_backends ();
708	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	1309
		1310	#if EV_USE_PORT
		1311	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
709	#endif	1312	#endif
710	#if EV_USE_KQUEUE	1313	#if EV_USE_KQUEUE
711	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1314	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
712	#endif	1315	#endif
713	#if EV_USE_EPOLL	1316	#if EV_USE_EPOLL
714	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1317	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
715	#endif	1318	#endif
716	#if EV_USE_POLL	1319	#if EV_USE_POLL
717	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1320	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
718	#endif	1321	#endif
719	#if EV_USE_SELECT	1322	#if EV_USE_SELECT
720	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1323	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
721	#endif	1324	#endif
722		1325
723	ev_watcher_init (&sigev, sigcb);	1326	ev_init (&pipeev, pipecb);
724	ev_set_priority (&sigev, EV_MAXPRI);	1327	ev_set_priority (&pipeev, EV_MAXPRI);
725	}	1328	}
726	}	1329	}
727		1330
728	void	1331	static void noinline
729	loop_destroy (EV_P)	1332	loop_destroy (EV_P)
730	{	1333	{
731	int i;	1334	int i;
732		1335
		1336	if (ev_is_active (&pipeev))
		1337	{
		1338	ev_ref (EV_A); /* signal watcher */
		1339	ev_io_stop (EV_A_ &pipeev);
		1340
		1341	#if EV_USE_EVENTFD
		1342	if (evfd >= 0)
		1343	close (evfd);
		1344	#endif
		1345
		1346	if (evpipe [0] >= 0)
		1347	{
		1348	close (evpipe [0]);
		1349	close (evpipe [1]);
		1350	}
		1351	}
		1352
733	#if EV_USE_WIN32	1353	#if EV_USE_INOTIFY
734	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	1354	if (fs_fd >= 0)
		1355	close (fs_fd);
		1356	#endif
		1357
		1358	if (backend_fd >= 0)
		1359	close (backend_fd);
		1360
		1361	#if EV_USE_PORT
		1362	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
735	#endif	1363	#endif
736	#if EV_USE_KQUEUE	1364	#if EV_USE_KQUEUE
737	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1365	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
738	#endif	1366	#endif
739	#if EV_USE_EPOLL	1367	#if EV_USE_EPOLL
740	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1368	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
741	#endif	1369	#endif
742	#if EV_USE_POLL	1370	#if EV_USE_POLL
743	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1371	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
744	#endif	1372	#endif
745	#if EV_USE_SELECT	1373	#if EV_USE_SELECT
746	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1374	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
747	#endif	1375	#endif
748		1376
749	for (i = NUMPRI; i--; )	1377	for (i = NUMPRI; i--; )
		1378	{
750	array_free (pending, [i]);	1379	array_free (pending, [i]);
		1380	#if EV_IDLE_ENABLE
		1381	array_free (idle, [i]);
		1382	#endif
		1383	}
		1384
		1385	ev_free (anfds); anfdmax = 0;
751		1386
752	/* have to use the microsoft-never-gets-it-right macro */	1387	/* have to use the microsoft-never-gets-it-right macro */
753	array_free_microshit (fdchange);	1388	array_free (fdchange, EMPTY);
754	array_free_microshit (timer);	1389	array_free (timer, EMPTY);
755	array_free_microshit (periodic);	1390	#if EV_PERIODIC_ENABLE
756	array_free_microshit (idle);	1391	array_free (periodic, EMPTY);
757	array_free_microshit (prepare);	1392	#endif
758	array_free_microshit (check);	1393	#if EV_FORK_ENABLE
		1394	array_free (fork, EMPTY);
		1395	#endif
		1396	array_free (prepare, EMPTY);
		1397	array_free (check, EMPTY);
		1398	#if EV_ASYNC_ENABLE
		1399	array_free (async, EMPTY);
		1400	#endif
759		1401
760	method = 0;	1402	backend = 0;
761	}	1403	}
762		1404
763	static void	1405	#if EV_USE_INOTIFY
		1406	void inline_size infy_fork (EV_P);
		1407	#endif
		1408
		1409	void inline_size
764	loop_fork (EV_P)	1410	loop_fork (EV_P)
765	{	1411	{
		1412	#if EV_USE_PORT
		1413	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1414	#endif
		1415	#if EV_USE_KQUEUE
		1416	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1417	#endif
766	#if EV_USE_EPOLL	1418	#if EV_USE_EPOLL
767	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1419	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
768	#endif	1420	#endif
769	#if EV_USE_KQUEUE	1421	#if EV_USE_INOTIFY
770	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1422	infy_fork (EV_A);
771	#endif	1423	#endif
772		1424
773	if (ev_is_active (&sigev))	1425	if (ev_is_active (&pipeev))
774	{	1426	{
775	/* default loop */	1427	/* this "locks" the handlers against writing to the pipe */
		1428	/* while we modify the fd vars */
		1429	gotsig = 1;
		1430	#if EV_ASYNC_ENABLE
		1431	gotasync = 1;
		1432	#endif
776		1433
777	ev_ref (EV_A);	1434	ev_ref (EV_A);
778	ev_io_stop (EV_A_ &sigev);	1435	ev_io_stop (EV_A_ &pipeev);
		1436
		1437	#if EV_USE_EVENTFD
		1438	if (evfd >= 0)
		1439	close (evfd);
		1440	#endif
		1441
		1442	if (evpipe [0] >= 0)
		1443	{
779	close (sigpipe [0]);	1444	close (evpipe [0]);
780	close (sigpipe [1]);	1445	close (evpipe [1]);
		1446	}
781		1447
782	while (pipe (sigpipe))
783	syserr ("(libev) error creating pipe");
784
785	siginit (EV_A);	1448	evpipe_init (EV_A);
		1449	/* now iterate over everything, in case we missed something */
		1450	pipecb (EV_A_ &pipeev, EV_READ);
786	}	1451	}
787		1452
788	postfork = 0;	1453	postfork = 0;
789	}	1454	}
790		1455
791	#if EV_MULTIPLICITY	1456	#if EV_MULTIPLICITY
792	struct ev_loop *	1457	struct ev_loop *
793	ev_loop_new (int methods)	1458	ev_loop_new (unsigned int flags)
794	{	1459	{
795	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1460	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
796		1461
797	memset (loop, 0, sizeof (struct ev_loop));	1462	memset (loop, 0, sizeof (struct ev_loop));
798		1463
799	loop_init (EV_A_ methods);	1464	loop_init (EV_A_ flags);
800		1465
801	if (ev_method (EV_A))	1466	if (ev_backend (EV_A))
802	return loop;	1467	return loop;
803		1468
804	return 0;	1469	return 0;
805	}	1470	}
806		1471
…		…
812	}	1477	}
813		1478
814	void	1479	void
815	ev_loop_fork (EV_P)	1480	ev_loop_fork (EV_P)
816	{	1481	{
817	postfork = 1;	1482	postfork = 1; /* must be in line with ev_default_fork */
818	}	1483	}
819
820	#endif	1484	#endif
821		1485
822	#if EV_MULTIPLICITY	1486	#if EV_MULTIPLICITY
823	struct ev_loop default_loop_struct;
824	static struct ev_loop *default_loop;
825
826	struct ev_loop *	1487	struct ev_loop *
		1488	ev_default_loop_init (unsigned int flags)
827	#else	1489	#else
828	static int default_loop;
829
830	int	1490	int
		1491	ev_default_loop (unsigned int flags)
831	#endif	1492	#endif
832	ev_default_loop (int methods)
833	{	1493	{
834	if (sigpipe [0] == sigpipe [1])
835	if (pipe (sigpipe))
836	return 0;
837
838	if (!default_loop)	1494	if (!ev_default_loop_ptr)
839	{	1495	{
840	#if EV_MULTIPLICITY	1496	#if EV_MULTIPLICITY
841	struct ev_loop *loop = default_loop = &default_loop_struct;	1497	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
842	#else	1498	#else
843	default_loop = 1;	1499	ev_default_loop_ptr = 1;
844	#endif	1500	#endif
845		1501
846	loop_init (EV_A_ methods);	1502	loop_init (EV_A_ flags);
847		1503
848	if (ev_method (EV_A))	1504	if (ev_backend (EV_A))
849	{	1505	{
850	siginit (EV_A);
851
852	#ifndef WIN32	1506	#ifndef _WIN32
853	ev_signal_init (&childev, childcb, SIGCHLD);	1507	ev_signal_init (&childev, childcb, SIGCHLD);
854	ev_set_priority (&childev, EV_MAXPRI);	1508	ev_set_priority (&childev, EV_MAXPRI);
855	ev_signal_start (EV_A_ &childev);	1509	ev_signal_start (EV_A_ &childev);
856	ev_unref (EV_A); /* child watcher should not keep loop alive */	1510	ev_unref (EV_A); /* child watcher should not keep loop alive */
857	#endif	1511	#endif
858	}	1512	}
859	else	1513	else
860	default_loop = 0;	1514	ev_default_loop_ptr = 0;
861	}	1515	}
862		1516
863	return default_loop;	1517	return ev_default_loop_ptr;
864	}	1518	}
865		1519
866	void	1520	void
867	ev_default_destroy (void)	1521	ev_default_destroy (void)
868	{	1522	{
869	#if EV_MULTIPLICITY	1523	#if EV_MULTIPLICITY
870	struct ev_loop *loop = default_loop;	1524	struct ev_loop *loop = ev_default_loop_ptr;
871	#endif	1525	#endif
872		1526
873	#ifndef WIN32	1527	#ifndef _WIN32
874	ev_ref (EV_A); /* child watcher */	1528	ev_ref (EV_A); /* child watcher */
875	ev_signal_stop (EV_A_ &childev);	1529	ev_signal_stop (EV_A_ &childev);
876	#endif	1530	#endif
877		1531
878	ev_ref (EV_A); /* signal watcher */
879	ev_io_stop (EV_A_ &sigev);
880
881	close (sigpipe [0]); sigpipe [0] = 0;
882	close (sigpipe [1]); sigpipe [1] = 0;
883
884	loop_destroy (EV_A);	1532	loop_destroy (EV_A);
885	}	1533	}
886		1534
887	void	1535	void
888	ev_default_fork (void)	1536	ev_default_fork (void)
889	{	1537	{
890	#if EV_MULTIPLICITY	1538	#if EV_MULTIPLICITY
891	struct ev_loop *loop = default_loop;	1539	struct ev_loop *loop = ev_default_loop_ptr;
892	#endif	1540	#endif
893		1541
894	if (method)	1542	if (backend)
895	postfork = 1;	1543	postfork = 1; /* must be in line with ev_loop_fork */
896	}	1544	}
897		1545
898	/*****************************************************************************/	1546	/*****************************************************************************/
899		1547
900	static void	1548	void
		1549	ev_invoke (EV_P_ void *w, int revents)
		1550	{
		1551	EV_CB_INVOKE ((W)w, revents);
		1552	}
		1553
		1554	void inline_speed
901	call_pending (EV_P)	1555	call_pending (EV_P)
902	{	1556	{
903	int pri;	1557	int pri;
904		1558
905	for (pri = NUMPRI; pri--; )	1559	for (pri = NUMPRI; pri--; )
906	while (pendingcnt [pri])	1560	while (pendingcnt [pri])
907	{	1561	{
908	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1562	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
909		1563
910	if (p->w)	1564	if (expect_true (p->w))
911	{	1565	{
		1566	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1567
912	p->w->pending = 0;	1568	p->w->pending = 0;
913	p->w->cb (EV_A_ p->w, p->events);	1569	EV_CB_INVOKE (p->w, p->events);
914	}	1570	}
915	}	1571	}
916	}	1572	}
917		1573
918	static void	1574	#if EV_IDLE_ENABLE
		1575	void inline_size
		1576	idle_reify (EV_P)
		1577	{
		1578	if (expect_false (idleall))
		1579	{
		1580	int pri;
		1581
		1582	for (pri = NUMPRI; pri--; )
		1583	{
		1584	if (pendingcnt [pri])
		1585	break;
		1586
		1587	if (idlecnt [pri])
		1588	{
		1589	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1590	break;
		1591	}
		1592	}
		1593	}
		1594	}
		1595	#endif
		1596
		1597	void inline_size
919	timers_reify (EV_P)	1598	timers_reify (EV_P)
920	{	1599	{
921	while (timercnt && ((WT)timers [0])->at <= mn_now)	1600	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
922	{	1601	{
923	struct ev_timer *w = timers [0];	1602	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
924		1603
925	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1604	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
926		1605
927	/* first reschedule or stop timer */	1606	/* first reschedule or stop timer */
928	if (w->repeat)	1607	if (w->repeat)
929	{	1608	{
930	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1609	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
931	((WT)w)->at = mn_now + w->repeat;	1610
		1611	ev_at (w) += w->repeat;
		1612	if (ev_at (w) < mn_now)
		1613	ev_at (w) = mn_now;
		1614
		1615	ANHE_at_set (timers [HEAP0]);
932	downheap ((WT *)timers, timercnt, 0);	1616	downheap (timers, timercnt, HEAP0);
933	}	1617	}
934	else	1618	else
935	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1619	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
936		1620
937	event (EV_A_ (W)w, EV_TIMEOUT);	1621	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
938	}	1622	}
939	}	1623	}
940		1624
941	static void	1625	#if EV_PERIODIC_ENABLE
		1626	void inline_size
942	periodics_reify (EV_P)	1627	periodics_reify (EV_P)
943	{	1628	{
944	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1629	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
945	{	1630	{
946	struct ev_periodic *w = periodics [0];	1631	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
947		1632
948	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1633	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
949		1634
950	/* first reschedule or stop timer */	1635	/* first reschedule or stop timer */
951	if (w->interval)	1636	if (w->reschedule_cb)
952	{	1637	{
953	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1638	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1639	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1640	ANHE_at_set (periodics [HEAP0]);
		1641	downheap (periodics, periodiccnt, HEAP0);
		1642	}
		1643	else if (w->interval)
		1644	{
		1645	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1646	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
954	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1647	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1648	ANHE_at_set (periodics [HEAP0]);
955	downheap ((WT *)periodics, periodiccnt, 0);	1649	downheap (periodics, periodiccnt, HEAP0);
956	}	1650	}
957	else	1651	else
958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1652	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
959		1653
960	event (EV_A_ (W)w, EV_PERIODIC);	1654	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
961	}	1655	}
962	}	1656	}
963		1657
964	static void	1658	static void noinline
965	periodics_reschedule (EV_P)	1659	periodics_reschedule (EV_P)
966	{	1660	{
967	int i;	1661	int i;
968		1662
969	/* adjust periodics after time jump */	1663	/* adjust periodics after time jump */
970	for (i = 0; i < periodiccnt; ++i)	1664	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
971	{	1665	{
972	struct ev_periodic *w = periodics [i];	1666	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
973		1667
		1668	if (w->reschedule_cb)
		1669	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
974	if (w->interval)	1670	else if (w->interval)
		1671	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1672
		1673	ANHE_at_set (periodics [i]);
		1674	}
		1675
		1676	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
		1677	for (i = periodiccnt >> 1; --i; )
		1678	downheap (periodics, periodiccnt, i + HEAP0);
		1679	}
		1680	#endif
		1681
		1682	void inline_speed
		1683	time_update (EV_P_ ev_tstamp max_block)
		1684	{
		1685	int i;
		1686
		1687	#if EV_USE_MONOTONIC
		1688	if (expect_true (have_monotonic))
		1689	{
		1690	ev_tstamp odiff = rtmn_diff;
		1691
		1692	mn_now = get_clock ();
		1693
		1694	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1695	/* interpolate in the meantime */
		1696	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
975	{	1697	{
976	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1698	ev_rt_now = rtmn_diff + mn_now;
		1699	return;
		1700	}
977		1701
978	if (fabs (diff) >= 1e-4)	1702	now_floor = mn_now;
		1703	ev_rt_now = ev_time ();
		1704
		1705	/* loop a few times, before making important decisions.
		1706	* on the choice of "4": one iteration isn't enough,
		1707	* in case we get preempted during the calls to
		1708	* ev_time and get_clock. a second call is almost guaranteed
		1709	* to succeed in that case, though. and looping a few more times
		1710	* doesn't hurt either as we only do this on time-jumps or
		1711	* in the unlikely event of having been preempted here.
		1712	*/
		1713	for (i = 4; --i; )
		1714	{
		1715	rtmn_diff = ev_rt_now - mn_now;
		1716
		1717	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1718	return; /* all is well */
		1719
		1720	ev_rt_now = ev_time ();
		1721	mn_now = get_clock ();
		1722	now_floor = mn_now;
		1723	}
		1724
		1725	# if EV_PERIODIC_ENABLE
		1726	periodics_reschedule (EV_A);
		1727	# endif
		1728	/* no timer adjustment, as the monotonic clock doesn't jump */
		1729	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1730	}
		1731	else
		1732	#endif
		1733	{
		1734	ev_rt_now = ev_time ();
		1735
		1736	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1737	{
		1738	#if EV_PERIODIC_ENABLE
		1739	periodics_reschedule (EV_A);
		1740	#endif
		1741	/* adjust timers. this is easy, as the offset is the same for all of them */
		1742	for (i = 0; i < timercnt; ++i)
979	{	1743	{
980	ev_periodic_stop (EV_A_ w);	1744	ANHE *he = timers + i + HEAP0;
981	ev_periodic_start (EV_A_ w);	1745	ANHE_w (*he)->at += ev_rt_now - mn_now;
982		1746	ANHE_at_set (*he);
983	i = 0; /* restart loop, inefficient, but time jumps should be rare */
984	}	1747	}
985	}	1748	}
986	}
987	}
988		1749
989	inline int
990	time_update_monotonic (EV_P)
991	{
992	mn_now = get_clock ();
993
994	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
995	{
996	rt_now = rtmn_diff + mn_now;
997	return 0;
998	}
999	else
1000	{
1001	now_floor = mn_now;
1002	rt_now = ev_time ();
1003	return 1;
1004	}
1005	}
1006
1007	static void
1008	time_update (EV_P)
1009	{
1010	int i;
1011
1012	#if EV_USE_MONOTONIC
1013	if (expect_true (have_monotonic))
1014	{
1015	if (time_update_monotonic (EV_A))
1016	{
1017	ev_tstamp odiff = rtmn_diff;
1018
1019	for (i = 4; --i; ) /* loop a few times, before making important decisions */
1020	{
1021	rtmn_diff = rt_now - mn_now;
1022
1023	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1024	return; /* all is well */
1025
1026	rt_now = ev_time ();
1027	mn_now = get_clock ();
1028	now_floor = mn_now;
1029	}
1030
1031	periodics_reschedule (EV_A);
1032	/* no timer adjustment, as the monotonic clock doesn't jump */
1033	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1034	}
1035	}
1036	else
1037	#endif
1038	{
1039	rt_now = ev_time ();
1040
1041	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1042	{
1043	periodics_reschedule (EV_A);
1044
1045	/* adjust timers. this is easy, as the offset is the same for all */
1046	for (i = 0; i < timercnt; ++i)
1047	((WT)timers [i])->at += rt_now - mn_now;
1048	}
1049
1050	mn_now = rt_now;	1750	mn_now = ev_rt_now;
1051	}	1751	}
1052	}	1752	}
1053		1753
1054	void	1754	void
1055	ev_ref (EV_P)	1755	ev_ref (EV_P)
…		…
1066	static int loop_done;	1766	static int loop_done;
1067		1767
1068	void	1768	void
1069	ev_loop (EV_P_ int flags)	1769	ev_loop (EV_P_ int flags)
1070	{	1770	{
1071	double block;	1771	loop_done = EVUNLOOP_CANCEL;
1072	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1772
		1773	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1073		1774
1074	do	1775	do
1075	{	1776	{
		1777	#ifndef _WIN32
		1778	if (expect_false (curpid)) /* penalise the forking check even more */
		1779	if (expect_false (getpid () != curpid))
		1780	{
		1781	curpid = getpid ();
		1782	postfork = 1;
		1783	}
		1784	#endif
		1785
		1786	#if EV_FORK_ENABLE
		1787	/* we might have forked, so queue fork handlers */
		1788	if (expect_false (postfork))
		1789	if (forkcnt)
		1790	{
		1791	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1792	call_pending (EV_A);
		1793	}
		1794	#endif
		1795
1076	/* queue check watchers (and execute them) */	1796	/* queue prepare watchers (and execute them) */
1077	if (expect_false (preparecnt))	1797	if (expect_false (preparecnt))
1078	{	1798	{
1079	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1799	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1080	call_pending (EV_A);	1800	call_pending (EV_A);
1081	}	1801	}
1082		1802
		1803	if (expect_false (!activecnt))
		1804	break;
		1805
1083	/* we might have forked, so reify kernel state if necessary */	1806	/* we might have forked, so reify kernel state if necessary */
1084	if (expect_false (postfork))	1807	if (expect_false (postfork))
1085	loop_fork (EV_A);	1808	loop_fork (EV_A);
1086		1809
1087	/* update fd-related kernel structures */	1810	/* update fd-related kernel structures */
1088	fd_reify (EV_A);	1811	fd_reify (EV_A);
1089		1812
1090	/* calculate blocking time */	1813	/* calculate blocking time */
		1814	{
		1815	ev_tstamp waittime = 0.;
		1816	ev_tstamp sleeptime = 0.;
1091		1817
1092	/* we only need this for !monotonic clockor timers, but as we basically	1818	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1093	always have timers, we just calculate it always */
1094	#if EV_USE_MONOTONIC
1095	if (expect_true (have_monotonic))
1096	time_update_monotonic (EV_A);
1097	else
1098	#endif
1099	{	1819	{
1100	rt_now = ev_time ();	1820	/* update time to cancel out callback processing overhead */
1101	mn_now = rt_now;	1821	time_update (EV_A_ 1e100);
1102	}
1103		1822
1104	if (flags & EVLOOP_NONBLOCK || idlecnt)
1105	block = 0.;
1106	else
1107	{
1108	block = MAX_BLOCKTIME;	1823	waittime = MAX_BLOCKTIME;
1109		1824
1110	if (timercnt)	1825	if (timercnt)
1111	{	1826	{
1112	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1827	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1113	if (block > to) block = to;	1828	if (waittime > to) waittime = to;
1114	}	1829	}
1115		1830
		1831	#if EV_PERIODIC_ENABLE
1116	if (periodiccnt)	1832	if (periodiccnt)
1117	{	1833	{
1118	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1834	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1119	if (block > to) block = to;	1835	if (waittime > to) waittime = to;
1120	}	1836	}
		1837	#endif
1121		1838
1122	if (block < 0.) block = 0.;	1839	if (expect_false (waittime < timeout_blocktime))
		1840	waittime = timeout_blocktime;
		1841
		1842	sleeptime = waittime - backend_fudge;
		1843
		1844	if (expect_true (sleeptime > io_blocktime))
		1845	sleeptime = io_blocktime;
		1846
		1847	if (sleeptime)
		1848	{
		1849	ev_sleep (sleeptime);
		1850	waittime -= sleeptime;
		1851	}
1123	}	1852	}
1124		1853
1125	method_poll (EV_A_ block);	1854	++loop_count;
		1855	backend_poll (EV_A_ waittime);
1126		1856
1127	/* update rt_now, do magic */	1857	/* update ev_rt_now, do magic */
1128	time_update (EV_A);	1858	time_update (EV_A_ waittime + sleeptime);
		1859	}
1129		1860
1130	/* queue pending timers and reschedule them */	1861	/* queue pending timers and reschedule them */
1131	timers_reify (EV_A); /* relative timers called last */	1862	timers_reify (EV_A); /* relative timers called last */
		1863	#if EV_PERIODIC_ENABLE
1132	periodics_reify (EV_A); /* absolute timers called first */	1864	periodics_reify (EV_A); /* absolute timers called first */
		1865	#endif
1133		1866
		1867	#if EV_IDLE_ENABLE
1134	/* queue idle watchers unless io or timers are pending */	1868	/* queue idle watchers unless other events are pending */
1135	if (!pendingcnt)	1869	idle_reify (EV_A);
1136	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1870	#endif
1137		1871
1138	/* queue check watchers, to be executed first */	1872	/* queue check watchers, to be executed first */
1139	if (checkcnt)	1873	if (expect_false (checkcnt))
1140	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1874	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1141		1875
1142	call_pending (EV_A);	1876	call_pending (EV_A);
1143	}	1877	}
1144	while (activecnt && !loop_done);	1878	while (expect_true (
		1879	activecnt
		1880	&& !loop_done
		1881	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1882	));
1145		1883
1146	if (loop_done != 2)	1884	if (loop_done == EVUNLOOP_ONE)
1147	loop_done = 0;	1885	loop_done = EVUNLOOP_CANCEL;
1148	}	1886	}
1149		1887
1150	void	1888	void
1151	ev_unloop (EV_P_ int how)	1889	ev_unloop (EV_P_ int how)
1152	{	1890	{
1153	loop_done = how;	1891	loop_done = how;
1154	}	1892	}
1155		1893
1156	/*****************************************************************************/	1894	/*****************************************************************************/
1157		1895
1158	inline void	1896	void inline_size
1159	wlist_add (WL *head, WL elem)	1897	wlist_add (WL *head, WL elem)
1160	{	1898	{
1161	elem->next = *head;	1899	elem->next = *head;
1162	*head = elem;	1900	*head = elem;
1163	}	1901	}
1164		1902
1165	inline void	1903	void inline_size
1166	wlist_del (WL *head, WL elem)	1904	wlist_del (WL *head, WL elem)
1167	{	1905	{
1168	while (*head)	1906	while (*head)
1169	{	1907	{
1170	if (*head == elem)	1908	if (*head == elem)
…		…
1175		1913
1176	head = &(*head)->next;	1914	head = &(*head)->next;
1177	}	1915	}
1178	}	1916	}
1179		1917
1180	inline void	1918	void inline_speed
1181	ev_clear_pending (EV_P_ W w)	1919	clear_pending (EV_P_ W w)
1182	{	1920	{
1183	if (w->pending)	1921	if (w->pending)
1184	{	1922	{
1185	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1923	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1186	w->pending = 0;	1924	w->pending = 0;
1187	}	1925	}
1188	}	1926	}
1189		1927
1190	inline void	1928	int
		1929	ev_clear_pending (EV_P_ void *w)
		1930	{
		1931	W w_ = (W)w;
		1932	int pending = w_->pending;
		1933
		1934	if (expect_true (pending))
		1935	{
		1936	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1937	w_->pending = 0;
		1938	p->w = 0;
		1939	return p->events;
		1940	}
		1941	else
		1942	return 0;
		1943	}
		1944
		1945	void inline_size
		1946	pri_adjust (EV_P_ W w)
		1947	{
		1948	int pri = w->priority;
		1949	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1950	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1951	w->priority = pri;
		1952	}
		1953
		1954	void inline_speed
1191	ev_start (EV_P_ W w, int active)	1955	ev_start (EV_P_ W w, int active)
1192	{	1956	{
1193	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1957	pri_adjust (EV_A_ w);
1194	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1195
1196	w->active = active;	1958	w->active = active;
1197	ev_ref (EV_A);	1959	ev_ref (EV_A);
1198	}	1960	}
1199		1961
1200	inline void	1962	void inline_size
1201	ev_stop (EV_P_ W w)	1963	ev_stop (EV_P_ W w)
1202	{	1964	{
1203	ev_unref (EV_A);	1965	ev_unref (EV_A);
1204	w->active = 0;	1966	w->active = 0;
1205	}	1967	}
1206		1968
1207	/*****************************************************************************/	1969	/*****************************************************************************/
1208		1970
1209	void	1971	void noinline
1210	ev_io_start (EV_P_ struct ev_io *w)	1972	ev_io_start (EV_P_ ev_io *w)
1211	{	1973	{
1212	int fd = w->fd;	1974	int fd = w->fd;
1213		1975
1214	if (ev_is_active (w))	1976	if (expect_false (ev_is_active (w)))
1215	return;	1977	return;
1216		1978
1217	assert (("ev_io_start called with negative fd", fd >= 0));	1979	assert (("ev_io_start called with negative fd", fd >= 0));
1218		1980
1219	ev_start (EV_A_ (W)w, 1);	1981	ev_start (EV_A_ (W)w, 1);
1220	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1982	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1221	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1983	wlist_add (&anfds[fd].head, (WL)w);
1222		1984
1223	fd_change (EV_A_ fd);	1985	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1986	w->events &= ~EV_IOFDSET;
1224	}	1987	}
1225		1988
1226	void	1989	void noinline
1227	ev_io_stop (EV_P_ struct ev_io *w)	1990	ev_io_stop (EV_P_ ev_io *w)
1228	{	1991	{
1229	ev_clear_pending (EV_A_ (W)w);	1992	clear_pending (EV_A_ (W)w);
1230	if (!ev_is_active (w))	1993	if (expect_false (!ev_is_active (w)))
1231	return;	1994	return;
1232		1995
		1996	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1997
1233	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1998	wlist_del (&anfds[w->fd].head, (WL)w);
1234	ev_stop (EV_A_ (W)w);	1999	ev_stop (EV_A_ (W)w);
1235		2000
1236	fd_change (EV_A_ w->fd);	2001	fd_change (EV_A_ w->fd, 1);
1237	}	2002	}
1238		2003
1239	void	2004	void noinline
1240	ev_timer_start (EV_P_ struct ev_timer *w)	2005	ev_timer_start (EV_P_ ev_timer *w)
1241	{	2006	{
1242	if (ev_is_active (w))	2007	if (expect_false (ev_is_active (w)))
1243	return;	2008	return;
1244		2009
1245	((WT)w)->at += mn_now;	2010	ev_at (w) += mn_now;
1246		2011
1247	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2012	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1248		2013
1249	ev_start (EV_A_ (W)w, ++timercnt);	2014	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1250	array_needsize (timers, timermax, timercnt, (void));	2015	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1251	timers [timercnt - 1] = w;	2016	ANHE_w (timers [ev_active (w)]) = (WT)w;
1252	upheap ((WT *)timers, timercnt - 1);	2017	ANHE_at_set (timers [ev_active (w)]);
		2018	upheap (timers, ev_active (w));
1253		2019
1254	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2020	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1255	}	2021	}
1256		2022
1257	void	2023	void noinline
1258	ev_timer_stop (EV_P_ struct ev_timer *w)	2024	ev_timer_stop (EV_P_ ev_timer *w)
1259	{	2025	{
1260	ev_clear_pending (EV_A_ (W)w);	2026	clear_pending (EV_A_ (W)w);
1261	if (!ev_is_active (w))	2027	if (expect_false (!ev_is_active (w)))
1262	return;	2028	return;
1263		2029
		2030	{
		2031	int active = ev_active (w);
		2032
1264	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2033	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1265		2034
1266	if (((W)w)->active < timercnt--)	2035	if (expect_true (active < timercnt + HEAP0 - 1))
1267	{	2036	{
1268	timers [((W)w)->active - 1] = timers [timercnt];	2037	timers [active] = timers [timercnt + HEAP0 - 1];
1269	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2038	adjustheap (timers, timercnt, active);
1270	}	2039	}
1271		2040
1272	((WT)w)->at = w->repeat;	2041	--timercnt;
		2042	}
		2043
		2044	ev_at (w) -= mn_now;
1273		2045
1274	ev_stop (EV_A_ (W)w);	2046	ev_stop (EV_A_ (W)w);
1275	}	2047	}
1276		2048
1277	void	2049	void noinline
1278	ev_timer_again (EV_P_ struct ev_timer *w)	2050	ev_timer_again (EV_P_ ev_timer *w)
1279	{	2051	{
1280	if (ev_is_active (w))	2052	if (ev_is_active (w))
1281	{	2053	{
1282	if (w->repeat)	2054	if (w->repeat)
1283	{	2055	{
1284	((WT)w)->at = mn_now + w->repeat;	2056	ev_at (w) = mn_now + w->repeat;
1285	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2057	ANHE_at_set (timers [ev_active (w)]);
		2058	adjustheap (timers, timercnt, ev_active (w));
1286	}	2059	}
1287	else	2060	else
1288	ev_timer_stop (EV_A_ w);	2061	ev_timer_stop (EV_A_ w);
1289	}	2062	}
1290	else if (w->repeat)	2063	else if (w->repeat)
		2064	{
		2065	ev_at (w) = w->repeat;
1291	ev_timer_start (EV_A_ w);	2066	ev_timer_start (EV_A_ w);
		2067	}
1292	}	2068	}
1293		2069
1294	void	2070	#if EV_PERIODIC_ENABLE
		2071	void noinline
1295	ev_periodic_start (EV_P_ struct ev_periodic *w)	2072	ev_periodic_start (EV_P_ ev_periodic *w)
1296	{	2073	{
1297	if (ev_is_active (w))	2074	if (expect_false (ev_is_active (w)))
1298	return;	2075	return;
1299		2076
		2077	if (w->reschedule_cb)
		2078	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2079	else if (w->interval)
		2080	{
1300	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2081	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1301
1302	/* this formula differs from the one in periodic_reify because we do not always round up */	2082	/* this formula differs from the one in periodic_reify because we do not always round up */
1303	if (w->interval)
1304	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	2083	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2084	}
		2085	else
		2086	ev_at (w) = w->offset;
1305		2087
1306	ev_start (EV_A_ (W)w, ++periodiccnt);	2088	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1307	array_needsize (periodics, periodicmax, periodiccnt, (void));	2089	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1308	periodics [periodiccnt - 1] = w;	2090	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1309	upheap ((WT *)periodics, periodiccnt - 1);	2091	upheap (periodics, ev_active (w));
1310		2092
1311	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2093	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1312	}	2094	}
1313		2095
1314	void	2096	void noinline
1315	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2097	ev_periodic_stop (EV_P_ ev_periodic *w)
1316	{	2098	{
1317	ev_clear_pending (EV_A_ (W)w);	2099	clear_pending (EV_A_ (W)w);
1318	if (!ev_is_active (w))	2100	if (expect_false (!ev_is_active (w)))
1319	return;	2101	return;
1320		2102
		2103	{
		2104	int active = ev_active (w);
		2105
1321	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2106	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1322		2107
1323	if (((W)w)->active < periodiccnt--)	2108	if (expect_true (active < periodiccnt + HEAP0 - 1))
1324	{	2109	{
1325	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2110	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1326	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2111	adjustheap (periodics, periodiccnt, active);
1327	}	2112	}
		2113
		2114	--periodiccnt;
		2115	}
1328		2116
1329	ev_stop (EV_A_ (W)w);	2117	ev_stop (EV_A_ (W)w);
1330	}	2118	}
1331		2119
1332	void	2120	void noinline
1333	ev_idle_start (EV_P_ struct ev_idle *w)	2121	ev_periodic_again (EV_P_ ev_periodic *w)
1334	{	2122	{
1335	if (ev_is_active (w))	2123	/* TODO: use adjustheap and recalculation */
1336	return;
1337
1338	ev_start (EV_A_ (W)w, ++idlecnt);
1339	array_needsize (idles, idlemax, idlecnt, (void));
1340	idles [idlecnt - 1] = w;
1341	}
1342
1343	void
1344	ev_idle_stop (EV_P_ struct ev_idle *w)
1345	{
1346	ev_clear_pending (EV_A_ (W)w);
1347	if (ev_is_active (w))
1348	return;
1349
1350	idles [((W)w)->active - 1] = idles [--idlecnt];
1351	ev_stop (EV_A_ (W)w);	2124	ev_periodic_stop (EV_A_ w);
		2125	ev_periodic_start (EV_A_ w);
1352	}	2126	}
1353		2127	#endif
1354	void
1355	ev_prepare_start (EV_P_ struct ev_prepare *w)
1356	{
1357	if (ev_is_active (w))
1358	return;
1359
1360	ev_start (EV_A_ (W)w, ++preparecnt);
1361	array_needsize (prepares, preparemax, preparecnt, (void));
1362	prepares [preparecnt - 1] = w;
1363	}
1364
1365	void
1366	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1367	{
1368	ev_clear_pending (EV_A_ (W)w);
1369	if (ev_is_active (w))
1370	return;
1371
1372	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1373	ev_stop (EV_A_ (W)w);
1374	}
1375
1376	void
1377	ev_check_start (EV_P_ struct ev_check *w)
1378	{
1379	if (ev_is_active (w))
1380	return;
1381
1382	ev_start (EV_A_ (W)w, ++checkcnt);
1383	array_needsize (checks, checkmax, checkcnt, (void));
1384	checks [checkcnt - 1] = w;
1385	}
1386
1387	void
1388	ev_check_stop (EV_P_ struct ev_check *w)
1389	{
1390	ev_clear_pending (EV_A_ (W)w);
1391	if (ev_is_active (w))
1392	return;
1393
1394	checks [((W)w)->active - 1] = checks [--checkcnt];
1395	ev_stop (EV_A_ (W)w);
1396	}
1397		2128
1398	#ifndef SA_RESTART	2129	#ifndef SA_RESTART
1399	# define SA_RESTART 0	2130	# define SA_RESTART 0
1400	#endif	2131	#endif
1401		2132
1402	void	2133	void noinline
1403	ev_signal_start (EV_P_ struct ev_signal *w)	2134	ev_signal_start (EV_P_ ev_signal *w)
1404	{	2135	{
1405	#if EV_MULTIPLICITY	2136	#if EV_MULTIPLICITY
1406	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2137	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1407	#endif	2138	#endif
1408	if (ev_is_active (w))	2139	if (expect_false (ev_is_active (w)))
1409	return;	2140	return;
1410		2141
1411	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2142	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1412		2143
		2144	evpipe_init (EV_A);
		2145
		2146	{
		2147	#ifndef _WIN32
		2148	sigset_t full, prev;
		2149	sigfillset (&full);
		2150	sigprocmask (SIG_SETMASK, &full, &prev);
		2151	#endif
		2152
		2153	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2154
		2155	#ifndef _WIN32
		2156	sigprocmask (SIG_SETMASK, &prev, 0);
		2157	#endif
		2158	}
		2159
1413	ev_start (EV_A_ (W)w, 1);	2160	ev_start (EV_A_ (W)w, 1);
1414	array_needsize (signals, signalmax, w->signum, signals_init);
1415	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2161	wlist_add (&signals [w->signum - 1].head, (WL)w);
1416		2162
1417	if (!((WL)w)->next)	2163	if (!((WL)w)->next)
1418	{	2164	{
1419	#if WIN32	2165	#if _WIN32
1420	signal (w->signum, sighandler);	2166	signal (w->signum, ev_sighandler);
1421	#else	2167	#else
1422	struct sigaction sa;	2168	struct sigaction sa;
1423	sa.sa_handler = sighandler;	2169	sa.sa_handler = ev_sighandler;
1424	sigfillset (&sa.sa_mask);	2170	sigfillset (&sa.sa_mask);
1425	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2171	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1426	sigaction (w->signum, &sa, 0);	2172	sigaction (w->signum, &sa, 0);
1427	#endif	2173	#endif
1428	}	2174	}
1429	}	2175	}
1430		2176
1431	void	2177	void noinline
1432	ev_signal_stop (EV_P_ struct ev_signal *w)	2178	ev_signal_stop (EV_P_ ev_signal *w)
1433	{	2179	{
1434	ev_clear_pending (EV_A_ (W)w);	2180	clear_pending (EV_A_ (W)w);
1435	if (!ev_is_active (w))	2181	if (expect_false (!ev_is_active (w)))
1436	return;	2182	return;
1437		2183
1438	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2184	wlist_del (&signals [w->signum - 1].head, (WL)w);
1439	ev_stop (EV_A_ (W)w);	2185	ev_stop (EV_A_ (W)w);
1440		2186
1441	if (!signals [w->signum - 1].head)	2187	if (!signals [w->signum - 1].head)
1442	signal (w->signum, SIG_DFL);	2188	signal (w->signum, SIG_DFL);
1443	}	2189	}
1444		2190
1445	void	2191	void
1446	ev_child_start (EV_P_ struct ev_child *w)	2192	ev_child_start (EV_P_ ev_child *w)
1447	{	2193	{
1448	#if EV_MULTIPLICITY	2194	#if EV_MULTIPLICITY
1449	assert (("child watchers are only supported in the default loop", loop == default_loop));	2195	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1450	#endif	2196	#endif
1451	if (ev_is_active (w))	2197	if (expect_false (ev_is_active (w)))
1452	return;	2198	return;
1453		2199
1454	ev_start (EV_A_ (W)w, 1);	2200	ev_start (EV_A_ (W)w, 1);
1455	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2201	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1456	}	2202	}
1457		2203
1458	void	2204	void
1459	ev_child_stop (EV_P_ struct ev_child *w)	2205	ev_child_stop (EV_P_ ev_child *w)
1460	{	2206	{
1461	ev_clear_pending (EV_A_ (W)w);	2207	clear_pending (EV_A_ (W)w);
1462	if (ev_is_active (w))	2208	if (expect_false (!ev_is_active (w)))
1463	return;	2209	return;
1464		2210
1465	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2211	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1466	ev_stop (EV_A_ (W)w);	2212	ev_stop (EV_A_ (W)w);
1467	}	2213	}
1468		2214
		2215	#if EV_STAT_ENABLE
		2216
		2217	# ifdef _WIN32
		2218	# undef lstat
		2219	# define lstat(a,b) _stati64 (a,b)
		2220	# endif
		2221
		2222	#define DEF_STAT_INTERVAL 5.0074891
		2223	#define MIN_STAT_INTERVAL 0.1074891
		2224
		2225	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2226
		2227	#if EV_USE_INOTIFY
		2228	# define EV_INOTIFY_BUFSIZE 8192
		2229
		2230	static void noinline
		2231	infy_add (EV_P_ ev_stat *w)
		2232	{
		2233	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);
		2234
		2235	if (w->wd < 0)
		2236	{
		2237	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2238
		2239	/* monitor some parent directory for speedup hints */
		2240	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2241	/* but an efficiency issue only */
		2242	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2243	{
		2244	char path [4096];
		2245	strcpy (path, w->path);
		2246
		2247	do
		2248	{
		2249	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2250	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2251
		2252	char *pend = strrchr (path, '/');
		2253
		2254	if (!pend)
		2255	break; /* whoops, no '/', complain to your admin */
		2256
		2257	*pend = 0;
		2258	w->wd = inotify_add_watch (fs_fd, path, mask);
		2259	}
		2260	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2261	}
		2262	}
		2263	else
		2264	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2265
		2266	if (w->wd >= 0)
		2267	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2268	}
		2269
		2270	static void noinline
		2271	infy_del (EV_P_ ev_stat *w)
		2272	{
		2273	int slot;
		2274	int wd = w->wd;
		2275
		2276	if (wd < 0)
		2277	return;
		2278
		2279	w->wd = -2;
		2280	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2281	wlist_del (&fs_hash [slot].head, (WL)w);
		2282
		2283	/* remove this watcher, if others are watching it, they will rearm */
		2284	inotify_rm_watch (fs_fd, wd);
		2285	}
		2286
		2287	static void noinline
		2288	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2289	{
		2290	if (slot < 0)
		2291	/* overflow, need to check for all hahs slots */
		2292	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2293	infy_wd (EV_A_ slot, wd, ev);
		2294	else
		2295	{
		2296	WL w_;
		2297
		2298	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2299	{
		2300	ev_stat *w = (ev_stat *)w_;
		2301	w_ = w_->next; /* lets us remove this watcher and all before it */
		2302
		2303	if (w->wd == wd || wd == -1)
		2304	{
		2305	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2306	{
		2307	w->wd = -1;
		2308	infy_add (EV_A_ w); /* re-add, no matter what */
		2309	}
		2310
		2311	stat_timer_cb (EV_A_ &w->timer, 0);
		2312	}
		2313	}
		2314	}
		2315	}
		2316
		2317	static void
		2318	infy_cb (EV_P_ ev_io *w, int revents)
		2319	{
		2320	char buf [EV_INOTIFY_BUFSIZE];
		2321	struct inotify_event *ev = (struct inotify_event *)buf;
		2322	int ofs;
		2323	int len = read (fs_fd, buf, sizeof (buf));
		2324
		2325	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2326	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2327	}
		2328
		2329	void inline_size
		2330	infy_init (EV_P)
		2331	{
		2332	if (fs_fd != -2)
		2333	return;
		2334
		2335	fs_fd = inotify_init ();
		2336
		2337	if (fs_fd >= 0)
		2338	{
		2339	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2340	ev_set_priority (&fs_w, EV_MAXPRI);
		2341	ev_io_start (EV_A_ &fs_w);
		2342	}
		2343	}
		2344
		2345	void inline_size
		2346	infy_fork (EV_P)
		2347	{
		2348	int slot;
		2349
		2350	if (fs_fd < 0)
		2351	return;
		2352
		2353	close (fs_fd);
		2354	fs_fd = inotify_init ();
		2355
		2356	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2357	{
		2358	WL w_ = fs_hash [slot].head;
		2359	fs_hash [slot].head = 0;
		2360
		2361	while (w_)
		2362	{
		2363	ev_stat *w = (ev_stat *)w_;
		2364	w_ = w_->next; /* lets us add this watcher */
		2365
		2366	w->wd = -1;
		2367
		2368	if (fs_fd >= 0)
		2369	infy_add (EV_A_ w); /* re-add, no matter what */
		2370	else
		2371	ev_timer_start (EV_A_ &w->timer);
		2372	}
		2373
		2374	}
		2375	}
		2376
		2377	#endif
		2378
		2379	void
		2380	ev_stat_stat (EV_P_ ev_stat *w)
		2381	{
		2382	if (lstat (w->path, &w->attr) < 0)
		2383	w->attr.st_nlink = 0;
		2384	else if (!w->attr.st_nlink)
		2385	w->attr.st_nlink = 1;
		2386	}
		2387
		2388	static void noinline
		2389	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2390	{
		2391	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2392
		2393	/* we copy this here each the time so that */
		2394	/* prev has the old value when the callback gets invoked */
		2395	w->prev = w->attr;
		2396	ev_stat_stat (EV_A_ w);
		2397
		2398	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2399	if (
		2400	w->prev.st_dev != w->attr.st_dev
		2401	|| w->prev.st_ino != w->attr.st_ino
		2402	|| w->prev.st_mode != w->attr.st_mode
		2403	|| w->prev.st_nlink != w->attr.st_nlink
		2404	|| w->prev.st_uid != w->attr.st_uid
		2405	|| w->prev.st_gid != w->attr.st_gid
		2406	|| w->prev.st_rdev != w->attr.st_rdev
		2407	|| w->prev.st_size != w->attr.st_size
		2408	|| w->prev.st_atime != w->attr.st_atime
		2409	|| w->prev.st_mtime != w->attr.st_mtime
		2410	|| w->prev.st_ctime != w->attr.st_ctime
		2411	) {
		2412	#if EV_USE_INOTIFY
		2413	infy_del (EV_A_ w);
		2414	infy_add (EV_A_ w);
		2415	ev_stat_stat (EV_A_ w); /* avoid race... */
		2416	#endif
		2417
		2418	ev_feed_event (EV_A_ w, EV_STAT);
		2419	}
		2420	}
		2421
		2422	void
		2423	ev_stat_start (EV_P_ ev_stat *w)
		2424	{
		2425	if (expect_false (ev_is_active (w)))
		2426	return;
		2427
		2428	/* since we use memcmp, we need to clear any padding data etc. */
		2429	memset (&w->prev, 0, sizeof (ev_statdata));
		2430	memset (&w->attr, 0, sizeof (ev_statdata));
		2431
		2432	ev_stat_stat (EV_A_ w);
		2433
		2434	if (w->interval < MIN_STAT_INTERVAL)
		2435	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2436
		2437	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2438	ev_set_priority (&w->timer, ev_priority (w));
		2439
		2440	#if EV_USE_INOTIFY
		2441	infy_init (EV_A);
		2442
		2443	if (fs_fd >= 0)
		2444	infy_add (EV_A_ w);
		2445	else
		2446	#endif
		2447	ev_timer_start (EV_A_ &w->timer);
		2448
		2449	ev_start (EV_A_ (W)w, 1);
		2450	}
		2451
		2452	void
		2453	ev_stat_stop (EV_P_ ev_stat *w)
		2454	{
		2455	clear_pending (EV_A_ (W)w);
		2456	if (expect_false (!ev_is_active (w)))
		2457	return;
		2458
		2459	#if EV_USE_INOTIFY
		2460	infy_del (EV_A_ w);
		2461	#endif
		2462	ev_timer_stop (EV_A_ &w->timer);
		2463
		2464	ev_stop (EV_A_ (W)w);
		2465	}
		2466	#endif
		2467
		2468	#if EV_IDLE_ENABLE
		2469	void
		2470	ev_idle_start (EV_P_ ev_idle *w)
		2471	{
		2472	if (expect_false (ev_is_active (w)))
		2473	return;
		2474
		2475	pri_adjust (EV_A_ (W)w);
		2476
		2477	{
		2478	int active = ++idlecnt [ABSPRI (w)];
		2479
		2480	++idleall;
		2481	ev_start (EV_A_ (W)w, active);
		2482
		2483	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2484	idles [ABSPRI (w)][active - 1] = w;
		2485	}
		2486	}
		2487
		2488	void
		2489	ev_idle_stop (EV_P_ ev_idle *w)
		2490	{
		2491	clear_pending (EV_A_ (W)w);
		2492	if (expect_false (!ev_is_active (w)))
		2493	return;
		2494
		2495	{
		2496	int active = ev_active (w);
		2497
		2498	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2499	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2500
		2501	ev_stop (EV_A_ (W)w);
		2502	--idleall;
		2503	}
		2504	}
		2505	#endif
		2506
		2507	void
		2508	ev_prepare_start (EV_P_ ev_prepare *w)
		2509	{
		2510	if (expect_false (ev_is_active (w)))
		2511	return;
		2512
		2513	ev_start (EV_A_ (W)w, ++preparecnt);
		2514	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2515	prepares [preparecnt - 1] = w;
		2516	}
		2517
		2518	void
		2519	ev_prepare_stop (EV_P_ ev_prepare *w)
		2520	{
		2521	clear_pending (EV_A_ (W)w);
		2522	if (expect_false (!ev_is_active (w)))
		2523	return;
		2524
		2525	{
		2526	int active = ev_active (w);
		2527
		2528	prepares [active - 1] = prepares [--preparecnt];
		2529	ev_active (prepares [active - 1]) = active;
		2530	}
		2531
		2532	ev_stop (EV_A_ (W)w);
		2533	}
		2534
		2535	void
		2536	ev_check_start (EV_P_ ev_check *w)
		2537	{
		2538	if (expect_false (ev_is_active (w)))
		2539	return;
		2540
		2541	ev_start (EV_A_ (W)w, ++checkcnt);
		2542	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2543	checks [checkcnt - 1] = w;
		2544	}
		2545
		2546	void
		2547	ev_check_stop (EV_P_ ev_check *w)
		2548	{
		2549	clear_pending (EV_A_ (W)w);
		2550	if (expect_false (!ev_is_active (w)))
		2551	return;
		2552
		2553	{
		2554	int active = ev_active (w);
		2555
		2556	checks [active - 1] = checks [--checkcnt];
		2557	ev_active (checks [active - 1]) = active;
		2558	}
		2559
		2560	ev_stop (EV_A_ (W)w);
		2561	}
		2562
		2563	#if EV_EMBED_ENABLE
		2564	void noinline
		2565	ev_embed_sweep (EV_P_ ev_embed *w)
		2566	{
		2567	ev_loop (w->other, EVLOOP_NONBLOCK);
		2568	}
		2569
		2570	static void
		2571	embed_io_cb (EV_P_ ev_io *io, int revents)
		2572	{
		2573	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2574
		2575	if (ev_cb (w))
		2576	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2577	else
		2578	ev_loop (w->other, EVLOOP_NONBLOCK);
		2579	}
		2580
		2581	static void
		2582	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2583	{
		2584	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2585
		2586	{
		2587	struct ev_loop *loop = w->other;
		2588
		2589	while (fdchangecnt)
		2590	{
		2591	fd_reify (EV_A);
		2592	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2593	}
		2594	}
		2595	}
		2596
		2597	#if 0
		2598	static void
		2599	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2600	{
		2601	ev_idle_stop (EV_A_ idle);
		2602	}
		2603	#endif
		2604
		2605	void
		2606	ev_embed_start (EV_P_ ev_embed *w)
		2607	{
		2608	if (expect_false (ev_is_active (w)))
		2609	return;
		2610
		2611	{
		2612	struct ev_loop *loop = w->other;
		2613	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2614	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2615	}
		2616
		2617	ev_set_priority (&w->io, ev_priority (w));
		2618	ev_io_start (EV_A_ &w->io);
		2619
		2620	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2621	ev_set_priority (&w->prepare, EV_MINPRI);
		2622	ev_prepare_start (EV_A_ &w->prepare);
		2623
		2624	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2625
		2626	ev_start (EV_A_ (W)w, 1);
		2627	}
		2628
		2629	void
		2630	ev_embed_stop (EV_P_ ev_embed *w)
		2631	{
		2632	clear_pending (EV_A_ (W)w);
		2633	if (expect_false (!ev_is_active (w)))
		2634	return;
		2635
		2636	ev_io_stop (EV_A_ &w->io);
		2637	ev_prepare_stop (EV_A_ &w->prepare);
		2638
		2639	ev_stop (EV_A_ (W)w);
		2640	}
		2641	#endif
		2642
		2643	#if EV_FORK_ENABLE
		2644	void
		2645	ev_fork_start (EV_P_ ev_fork *w)
		2646	{
		2647	if (expect_false (ev_is_active (w)))
		2648	return;
		2649
		2650	ev_start (EV_A_ (W)w, ++forkcnt);
		2651	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2652	forks [forkcnt - 1] = w;
		2653	}
		2654
		2655	void
		2656	ev_fork_stop (EV_P_ ev_fork *w)
		2657	{
		2658	clear_pending (EV_A_ (W)w);
		2659	if (expect_false (!ev_is_active (w)))
		2660	return;
		2661
		2662	{
		2663	int active = ev_active (w);
		2664
		2665	forks [active - 1] = forks [--forkcnt];
		2666	ev_active (forks [active - 1]) = active;
		2667	}
		2668
		2669	ev_stop (EV_A_ (W)w);
		2670	}
		2671	#endif
		2672
		2673	#if EV_ASYNC_ENABLE
		2674	void
		2675	ev_async_start (EV_P_ ev_async *w)
		2676	{
		2677	if (expect_false (ev_is_active (w)))
		2678	return;
		2679
		2680	evpipe_init (EV_A);
		2681
		2682	ev_start (EV_A_ (W)w, ++asynccnt);
		2683	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2684	asyncs [asynccnt - 1] = w;
		2685	}
		2686
		2687	void
		2688	ev_async_stop (EV_P_ ev_async *w)
		2689	{
		2690	clear_pending (EV_A_ (W)w);
		2691	if (expect_false (!ev_is_active (w)))
		2692	return;
		2693
		2694	{
		2695	int active = ev_active (w);
		2696
		2697	asyncs [active - 1] = asyncs [--asynccnt];
		2698	ev_active (asyncs [active - 1]) = active;
		2699	}
		2700
		2701	ev_stop (EV_A_ (W)w);
		2702	}
		2703
		2704	void
		2705	ev_async_send (EV_P_ ev_async *w)
		2706	{
		2707	w->sent = 1;
		2708	evpipe_write (EV_A_ &gotasync);
		2709	}
		2710	#endif
		2711
1469	/*****************************************************************************/	2712	/*****************************************************************************/
1470		2713
1471	struct ev_once	2714	struct ev_once
1472	{	2715	{
1473	struct ev_io io;	2716	ev_io io;
1474	struct ev_timer to;	2717	ev_timer to;
1475	void (*cb)(int revents, void *arg);	2718	void (*cb)(int revents, void *arg);
1476	void *arg;	2719	void *arg;
1477	};	2720	};
1478		2721
1479	static void	2722	static void
…		…
1488		2731
1489	cb (revents, arg);	2732	cb (revents, arg);
1490	}	2733	}
1491		2734
1492	static void	2735	static void
1493	once_cb_io (EV_P_ struct ev_io *w, int revents)	2736	once_cb_io (EV_P_ ev_io *w, int revents)
1494	{	2737	{
1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2738	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1496	}	2739	}
1497		2740
1498	static void	2741	static void
1499	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2742	once_cb_to (EV_P_ ev_timer *w, int revents)
1500	{	2743	{
1501	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2744	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1502	}	2745	}
1503		2746
1504	void	2747	void
1505	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2748	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1506	{	2749	{
1507	struct ev_once *once = ev_malloc (sizeof (struct ev_once));	2750	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1508		2751
1509	if (!once)	2752	if (expect_false (!once))
		2753	{
1510	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2754	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1511	else	2755	return;
1512	{	2756	}
		2757
1513	once->cb = cb;	2758	once->cb = cb;
1514	once->arg = arg;	2759	once->arg = arg;
1515		2760
1516	ev_watcher_init (&once->io, once_cb_io);	2761	ev_init (&once->io, once_cb_io);
1517	if (fd >= 0)	2762	if (fd >= 0)
1518	{	2763	{
1519	ev_io_set (&once->io, fd, events);	2764	ev_io_set (&once->io, fd, events);
1520	ev_io_start (EV_A_ &once->io);	2765	ev_io_start (EV_A_ &once->io);
1521	}	2766	}
1522		2767
1523	ev_watcher_init (&once->to, once_cb_to);	2768	ev_init (&once->to, once_cb_to);
1524	if (timeout >= 0.)	2769	if (timeout >= 0.)
1525	{	2770	{
1526	ev_timer_set (&once->to, timeout, 0.);	2771	ev_timer_set (&once->to, timeout, 0.);
1527	ev_timer_start (EV_A_ &once->to);	2772	ev_timer_start (EV_A_ &once->to);
1528	}
1529	}	2773	}
1530	}	2774	}
1531		2775
		2776	#if EV_MULTIPLICITY
		2777	#include "ev_wrap.h"
		2778	#endif
		2779
		2780	#ifdef __cplusplus
		2781	}
		2782	#endif
		2783

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