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Comparing libev/ev.c (file contents):
Revision 1.124 by root, Sat Nov 17 02:26:24 2007 UTC vs.
Revision 1.247 by root, Wed May 21 21:22:10 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
37	# include "config.h"	49	# include "config.h"
		50	# endif
38		51
39	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
40	# ifndef EV_USE_MONOTONIC	53	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
42	# endif	55	# endif
43	# ifndef EV_USE_REALTIME	56	# ifndef EV_USE_REALTIME
44	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
45	# endif	58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
46	# endif	66	# endif
47		67
48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
49	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
50	# endif	74	# endif
51		75
52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
53	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
54	# endif	82	# endif
55		83
56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
57	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
58	# endif	90	# endif
59		91
60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
62	# endif	98	# endif
63		99
64	# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT)	100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
65	# define EV_USE_PORT 1	102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
66	# 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
67		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
68	#endif	132	#endif
69		133
70	#include <math.h>	134	#include <math.h>
71	#include <stdlib.h>	135	#include <stdlib.h>
72	#include <fcntl.h>	136	#include <fcntl.h>
…		…
79	#include <sys/types.h>	143	#include <sys/types.h>
80	#include <time.h>	144	#include <time.h>
81		145
82	#include <signal.h>	146	#include <signal.h>
83		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
84	#ifndef _WIN32	154	#ifndef _WIN32
85	# include <unistd.h>
86	# include <sys/time.h>	155	# include <sys/time.h>
87	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
88	#else	158	#else
89	# define WIN32_LEAN_AND_MEAN	159	# define WIN32_LEAN_AND_MEAN
90	# include <windows.h>	160	# include <windows.h>
91	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
92	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
93	# endif	163	# endif
94	#endif	164	#endif
95		165
96	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
97		167
98	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
99	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
100	#endif	170	#endif
101		171
102	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
103	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
104	#endif	178	#endif
105		179
106	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
107	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
108	#endif	182	#endif
…		…
114	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
115	# endif	189	# endif
116	#endif	190	#endif
117		191
118	#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
119	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
120	#endif	198	#endif
121		199
122	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
123	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
124	#endif	202	#endif
125		203
126	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
127	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
128	#endif	206	#endif
129		207
130	/**/	208	#ifndef EV_USE_INOTIFY
131		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
132	/* darwin simply cannot be helped */	210	# define EV_USE_INOTIFY 1
133	#ifdef __APPLE__	211	# else
134	# undef EV_USE_POLL	212	# define EV_USE_INOTIFY 0
135	# undef EV_USE_KQUEUE
136	#endif	213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#ifndef EV_USE_4HEAP
		241	# define EV_USE_4HEAP !EV_MINIMAL
		242	#endif
		243
		244	#ifndef EV_HEAP_CACHE_AT
		245	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		246	#endif
		247
		248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
137		249
138	#ifndef CLOCK_MONOTONIC	250	#ifndef CLOCK_MONOTONIC
139	# undef EV_USE_MONOTONIC	251	# undef EV_USE_MONOTONIC
140	# define EV_USE_MONOTONIC 0	252	# define EV_USE_MONOTONIC 0
141	#endif	253	#endif
…		…
143	#ifndef CLOCK_REALTIME	255	#ifndef CLOCK_REALTIME
144	# undef EV_USE_REALTIME	256	# undef EV_USE_REALTIME
145	# define EV_USE_REALTIME 0	257	# define EV_USE_REALTIME 0
146	#endif	258	#endif
147		259
		260	#if !EV_STAT_ENABLE
		261	# undef EV_USE_INOTIFY
		262	# define EV_USE_INOTIFY 0
		263	#endif
		264
		265	#if !EV_USE_NANOSLEEP
		266	# ifndef _WIN32
		267	# include <sys/select.h>
		268	# endif
		269	#endif
		270
		271	#if EV_USE_INOTIFY
		272	# include <sys/inotify.h>
		273	#endif
		274
148	#if EV_SELECT_IS_WINSOCKET	275	#if EV_SELECT_IS_WINSOCKET
149	# include <winsock.h>	276	# include <winsock.h>
150	#endif	277	#endif
151		278
		279	#if EV_USE_EVENTFD
		280	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		281	# include <stdint.h>
		282	# ifdef __cplusplus
		283	extern "C" {
		284	# endif
		285	int eventfd (unsigned int initval, int flags);
		286	# ifdef __cplusplus
		287	}
		288	# endif
		289	#endif
		290
152	/**/	291	/**/
		292
		293	/*
		294	* This is used to avoid floating point rounding problems.
		295	* It is added to ev_rt_now when scheduling periodics
		296	* to ensure progress, time-wise, even when rounding
		297	* errors are against us.
		298	* This value is good at least till the year 4000.
		299	* Better solutions welcome.
		300	*/
		301	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
153		302
154	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	303	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
155	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	304	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
156	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
157	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	305	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
158		306
159	#ifdef EV_H
160	# include EV_H
161	#else
162	# include "ev.h"
163	#endif
164
165	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
166	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
167	# define inline static inline	309	# define noinline __attribute__ ((noinline))
168	#else	310	#else
169	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
170	# define inline static	312	# define noinline
		313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		314	# define inline
		315	# endif
171	#endif	316	#endif
172		317
173	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
174	#define expect_true(expr) expect ((expr) != 0, 1)	319	#define expect_true(expr) expect ((expr) != 0, 1)
		320	#define inline_size static inline
		321
		322	#if EV_MINIMAL
		323	# define inline_speed static noinline
		324	#else
		325	# define inline_speed static inline
		326	#endif
175		327
176	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	328	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
177	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	329	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
178		330
179	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	331	#define EMPTY /* required for microsofts broken pseudo-c compiler */
180	#define EMPTY2(a,b) /* used to suppress some warnings */	332	#define EMPTY2(a,b) /* used to suppress some warnings */
181		333
182	typedef struct ev_watcher *W;	334	typedef ev_watcher *W;
183	typedef struct ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
184	typedef struct ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
185		337
		338	#define ev_active(w) ((W)(w))->active
		339	#define ev_at(w) ((WT)(w))->at
		340
		341	#if EV_USE_MONOTONIC
		342	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		343	/* giving it a reasonably high chance of working on typical architetcures */
186	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	344	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		345	#endif
187		346
188	#ifdef _WIN32	347	#ifdef _WIN32
189	# include "ev_win32.c"	348	# include "ev_win32.c"
190	#endif	349	#endif
191		350
192	/*****************************************************************************/	351	/*****************************************************************************/
193		352
194	static void (*syserr_cb)(const char *msg);	353	static void (*syserr_cb)(const char *msg);
195		354
		355	void
196	void ev_set_syserr_cb (void (*cb)(const char *msg))	356	ev_set_syserr_cb (void (*cb)(const char *msg))
197	{	357	{
198	syserr_cb = cb;	358	syserr_cb = cb;
199	}	359	}
200		360
201	static void	361	static void noinline
202	syserr (const char *msg)	362	syserr (const char *msg)
203	{	363	{
204	if (!msg)	364	if (!msg)
205	msg = "(libev) system error";	365	msg = "(libev) system error";
206		366
…		…
211	perror (msg);	371	perror (msg);
212	abort ();	372	abort ();
213	}	373	}
214	}	374	}
215		375
		376	static void *
		377	ev_realloc_emul (void *ptr, long size)
		378	{
		379	/* some systems, notably openbsd and darwin, fail to properly
		380	* implement realloc (x, 0) (as required by both ansi c-98 and
		381	* the single unix specification, so work around them here.
		382	*/
		383
		384	if (size)
		385	return realloc (ptr, size);
		386
		387	free (ptr);
		388	return 0;
		389	}
		390
216	static void *(*alloc)(void *ptr, long size);	391	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
217		392
		393	void
218	void ev_set_allocator (void *(*cb)(void *ptr, long size))	394	ev_set_allocator (void *(*cb)(void *ptr, long size))
219	{	395	{
220	alloc = cb;	396	alloc = cb;
221	}	397	}
222		398
223	static void *	399	inline_speed void *
224	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
225	{	401	{
226	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
227		403
228	if (!ptr && size)	404	if (!ptr && size)
229	{	405	{
230	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
231	abort ();	407	abort ();
…		…
252	typedef struct	428	typedef struct
253	{	429	{
254	W w;	430	W w;
255	int events;	431	int events;
256	} ANPENDING;	432	} ANPENDING;
		433
		434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
		436	typedef struct
		437	{
		438	WL head;
		439	} ANFS;
		440	#endif
		441
		442	/* Heap Entry */
		443	#if EV_HEAP_CACHE_AT
		444	typedef struct {
		445	ev_tstamp at;
		446	WT w;
		447	} ANHE;
		448
		449	#define ANHE_w(he) (he).w /* access watcher, read-write */
		450	#define ANHE_at(he) (he).at /* access cached at, read-only */
		451	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		452	#else
		453	typedef WT ANHE;
		454
		455	#define ANHE_w(he) (he)
		456	#define ANHE_at(he) (he)->at
		457	#define ANHE_at_set(he)
		458	#endif
257		459
258	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
259		461
260	struct ev_loop	462	struct ev_loop
261	{	463	{
…		…
295	gettimeofday (&tv, 0);	497	gettimeofday (&tv, 0);
296	return tv.tv_sec + tv.tv_usec * 1e-6;	498	return tv.tv_sec + tv.tv_usec * 1e-6;
297	#endif	499	#endif
298	}	500	}
299		501
300	inline ev_tstamp	502	ev_tstamp inline_size
301	get_clock (void)	503	get_clock (void)
302	{	504	{
303	#if EV_USE_MONOTONIC	505	#if EV_USE_MONOTONIC
304	if (expect_true (have_monotonic))	506	if (expect_true (have_monotonic))
305	{	507	{
…		…
318	{	520	{
319	return ev_rt_now;	521	return ev_rt_now;
320	}	522	}
321	#endif	523	#endif
322		524
323	#define array_roundsize(type,n) (((n) | 4) & ~3)	525	void
		526	ev_sleep (ev_tstamp delay)
		527	{
		528	if (delay > 0.)
		529	{
		530	#if EV_USE_NANOSLEEP
		531	struct timespec ts;
		532
		533	ts.tv_sec = (time_t)delay;
		534	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		535
		536	nanosleep (&ts, 0);
		537	#elif defined(_WIN32)
		538	Sleep ((unsigned long)(delay * 1e3));
		539	#else
		540	struct timeval tv;
		541
		542	tv.tv_sec = (time_t)delay;
		543	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		544
		545	select (0, 0, 0, 0, &tv);
		546	#endif
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		553
		554	int inline_size
		555	array_nextsize (int elem, int cur, int cnt)
		556	{
		557	int ncur = cur + 1;
		558
		559	do
		560	ncur <<= 1;
		561	while (cnt > ncur);
		562
		563	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		564	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		565	{
		566	ncur *= elem;
		567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		568	ncur = ncur - sizeof (void *) * 4;
		569	ncur /= elem;
		570	}
		571
		572	return ncur;
		573	}
		574
		575	static noinline void *
		576	array_realloc (int elem, void *base, int *cur, int cnt)
		577	{
		578	*cur = array_nextsize (elem, *cur, cnt);
		579	return ev_realloc (base, elem * *cur);
		580	}
324		581
325	#define array_needsize(type,base,cur,cnt,init) \	582	#define array_needsize(type,base,cur,cnt,init) \
326	if (expect_false ((cnt) > cur)) \	583	if (expect_false ((cnt) > (cur))) \
327	{ \	584	{ \
328	int newcnt = cur; \	585	int ocur_ = (cur); \
329	do \	586	(base) = (type *)array_realloc \
330	{ \	587	(sizeof (type), (base), &(cur), (cnt)); \
331	newcnt = array_roundsize (type, newcnt << 1); \	588	init ((base) + (ocur_), (cur) - ocur_); \
332	} \
333	while ((cnt) > newcnt); \
334	\
335	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
336	init (base + cur, newcnt - cur); \
337	cur = newcnt; \
338	}	589	}
339		590
		591	#if 0
340	#define array_slim(type,stem) \	592	#define array_slim(type,stem) \
341	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	593	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
342	{ \	594	{ \
343	stem ## max = array_roundsize (stem ## cnt >> 1); \	595	stem ## max = array_roundsize (stem ## cnt >> 1); \
344	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	596	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
345	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	597	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
346	}	598	}
		599	#endif
347		600
348	#define array_free(stem, idx) \	601	#define array_free(stem, idx) \
349	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	602	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
350		603
351	/*****************************************************************************/	604	/*****************************************************************************/
352		605
353	static void	606	void noinline
		607	ev_feed_event (EV_P_ void *w, int revents)
		608	{
		609	W w_ = (W)w;
		610	int pri = ABSPRI (w_);
		611
		612	if (expect_false (w_->pending))
		613	pendings [pri][w_->pending - 1].events |= revents;
		614	else
		615	{
		616	w_->pending = ++pendingcnt [pri];
		617	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		618	pendings [pri][w_->pending - 1].w = w_;
		619	pendings [pri][w_->pending - 1].events = revents;
		620	}
		621	}
		622
		623	void inline_speed
		624	queue_events (EV_P_ W *events, int eventcnt, int type)
		625	{
		626	int i;
		627
		628	for (i = 0; i < eventcnt; ++i)
		629	ev_feed_event (EV_A_ events [i], type);
		630	}
		631
		632	/*****************************************************************************/
		633
		634	void inline_size
354	anfds_init (ANFD *base, int count)	635	anfds_init (ANFD *base, int count)
355	{	636	{
356	while (count--)	637	while (count--)
357	{	638	{
358	base->head = 0;	639	base->head = 0;
…		…
361		642
362	++base;	643	++base;
363	}	644	}
364	}	645	}
365		646
366	void	647	void inline_speed
367	ev_feed_event (EV_P_ void *w, int revents)
368	{
369	W w_ = (W)w;
370
371	if (expect_false (w_->pending))
372	{
373	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
374	return;
375	}
376
377	w_->pending = ++pendingcnt [ABSPRI (w_)];
378	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
379	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
380	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
381	}
382
383	static void
384	queue_events (EV_P_ W *events, int eventcnt, int type)
385	{
386	int i;
387
388	for (i = 0; i < eventcnt; ++i)
389	ev_feed_event (EV_A_ events [i], type);
390	}
391
392	inline void
393	fd_event (EV_P_ int fd, int revents)	648	fd_event (EV_P_ int fd, int revents)
394	{	649	{
395	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
396	struct ev_io *w;	651	ev_io *w;
397		652
398	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	653	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
399	{	654	{
400	int ev = w->events & revents;	655	int ev = w->events & revents;
401		656
402	if (ev)	657	if (ev)
403	ev_feed_event (EV_A_ (W)w, ev);	658	ev_feed_event (EV_A_ (W)w, ev);
…		…
405	}	660	}
406		661
407	void	662	void
408	ev_feed_fd_event (EV_P_ int fd, int revents)	663	ev_feed_fd_event (EV_P_ int fd, int revents)
409	{	664	{
		665	if (fd >= 0 && fd < anfdmax)
410	fd_event (EV_A_ fd, revents);	666	fd_event (EV_A_ fd, revents);
411	}	667	}
412		668
413	/*****************************************************************************/	669	void inline_size
414
415	inline void
416	fd_reify (EV_P)	670	fd_reify (EV_P)
417	{	671	{
418	int i;	672	int i;
419		673
420	for (i = 0; i < fdchangecnt; ++i)	674	for (i = 0; i < fdchangecnt; ++i)
421	{	675	{
422	int fd = fdchanges [i];	676	int fd = fdchanges [i];
423	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
424	struct ev_io *w;	678	ev_io *w;
425		679
426	int events = 0;	680	unsigned char events = 0;
427		681
428	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	682	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
429	events |= w->events;	683	events |= (unsigned char)w->events;
430		684
431	#if EV_SELECT_IS_WINSOCKET	685	#if EV_SELECT_IS_WINSOCKET
432	if (events)	686	if (events)
433	{	687	{
434	unsigned long argp;	688	unsigned long argp;
		689	#ifdef EV_FD_TO_WIN32_HANDLE
		690	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		691	#else
435	anfd->handle = _get_osfhandle (fd);	692	anfd->handle = _get_osfhandle (fd);
		693	#endif
436	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	694	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
437	}	695	}
438	#endif	696	#endif
439		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
440	anfd->reify = 0;	702	anfd->reify = 0;
441
442	method_modify (EV_A_ fd, anfd->events, events);
443	anfd->events = events;	703	anfd->events = events;
		704
		705	if (o_events != events || o_reify & EV_IOFDSET)
		706	backend_modify (EV_A_ fd, o_events, events);
		707	}
444	}	708	}
445		709
446	fdchangecnt = 0;	710	fdchangecnt = 0;
447	}	711	}
448		712
449	static void	713	void inline_size
450	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
451	{	715	{
452	if (expect_false (anfds [fd].reify))	716	unsigned char reify = anfds [fd].reify;
453	return;
454
455	anfds [fd].reify = 1;	717	anfds [fd].reify |= flags;
456		718
		719	if (expect_true (!reify))
		720	{
457	++fdchangecnt;	721	++fdchangecnt;
458	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
459	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
460	}	725	}
461		726
462	static void	727	void inline_speed
463	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
464	{	729	{
465	struct ev_io *w;	730	ev_io *w;
466		731
467	while ((w = (struct ev_io *)anfds [fd].head))	732	while ((w = (ev_io *)anfds [fd].head))
468	{	733	{
469	ev_io_stop (EV_A_ w);	734	ev_io_stop (EV_A_ w);
470	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	735	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
471	}	736	}
472	}	737	}
473		738
474	inline int	739	int inline_size
475	fd_valid (int fd)	740	fd_valid (int fd)
476	{	741	{
477	#ifdef _WIN32	742	#ifdef _WIN32
478	return _get_osfhandle (fd) != -1;	743	return _get_osfhandle (fd) != -1;
479	#else	744	#else
480	return fcntl (fd, F_GETFD) != -1;	745	return fcntl (fd, F_GETFD) != -1;
481	#endif	746	#endif
482	}	747	}
483		748
484	/* called on EBADF to verify fds */	749	/* called on EBADF to verify fds */
485	static void	750	static void noinline
486	fd_ebadf (EV_P)	751	fd_ebadf (EV_P)
487	{	752	{
488	int fd;	753	int fd;
489		754
490	for (fd = 0; fd < anfdmax; ++fd)	755	for (fd = 0; fd < anfdmax; ++fd)
…		…
492	if (!fd_valid (fd) == -1 && errno == EBADF)	757	if (!fd_valid (fd) == -1 && errno == EBADF)
493	fd_kill (EV_A_ fd);	758	fd_kill (EV_A_ fd);
494	}	759	}
495		760
496	/* called on ENOMEM in select/poll to kill some fds and retry */	761	/* called on ENOMEM in select/poll to kill some fds and retry */
497	static void	762	static void noinline
498	fd_enomem (EV_P)	763	fd_enomem (EV_P)
499	{	764	{
500	int fd;	765	int fd;
501		766
502	for (fd = anfdmax; fd--; )	767	for (fd = anfdmax; fd--; )
…		…
505	fd_kill (EV_A_ fd);	770	fd_kill (EV_A_ fd);
506	return;	771	return;
507	}	772	}
508	}	773	}
509		774
510	/* usually called after fork if method needs to re-arm all fds from scratch */	775	/* usually called after fork if backend needs to re-arm all fds from scratch */
511	static void	776	static void noinline
512	fd_rearm_all (EV_P)	777	fd_rearm_all (EV_P)
513	{	778	{
514	int fd;	779	int fd;
515		780
516	/* this should be highly optimised to not do anything but set a flag */
517	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
518	if (anfds [fd].events)	782	if (anfds [fd].events)
519	{	783	{
520	anfds [fd].events = 0;	784	anfds [fd].events = 0;
521	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET | 1);
522	}	786	}
523	}	787	}
524		788
525	/*****************************************************************************/	789	/*****************************************************************************/
526		790
527	static void	791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		808
		809	/* towards the root */
		810	void inline_speed
528	upheap (WT *heap, int k)	811	upheap (ANHE *heap, int k)
529	{	812	{
530	WT w = heap [k];	813	ANHE he = heap [k];
531		814
532	while (k && heap [k >> 1]->at > w->at)	815	for (;;)
533	{
534	heap [k] = heap [k >> 1];
535	((W)heap [k])->active = k + 1;
536	k >>= 1;
537	}	816	{
		817	int p = HPARENT (k);
538		818
539	heap [k] = w;	819	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
540	((W)heap [k])->active = k + 1;
541
542	}
543
544	static void
545	downheap (WT *heap, int N, int k)
546	{
547	WT w = heap [k];
548
549	while (k < (N >> 1))
550	{
551	int j = k << 1;
552
553	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
554	++j;
555
556	if (w->at <= heap [j]->at)
557	break;	820	break;
558		821
559	heap [k] = heap [j];	822	heap [k] = heap [p];
560	((W)heap [k])->active = k + 1;	823	ev_active (ANHE_w (heap [k])) = k;
561	k = j;	824	k = p;
562	}	825	}
563		826
564	heap [k] = w;	827	heap [k] = he;
565	((W)heap [k])->active = k + 1;	828	ev_active (ANHE_w (he)) = k;
566	}	829	}
567		830
568	inline void	831	/* away from the root */
		832	void inline_speed
		833	downheap (ANHE *heap, int N, int k)
		834	{
		835	ANHE he = heap [k];
		836	ANHE *E = heap + N + HEAP0;
		837
		838	for (;;)
		839	{
		840	ev_tstamp minat;
		841	ANHE *minpos;
		842	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		843
		844	// find minimum child
		845	if (expect_true (pos + DHEAP - 1 < E))
		846	{
		847	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		848	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		849	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		850	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		851	}
		852	else if (pos < E)
		853	{
		854	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		855	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		856	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		857	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		858	}
		859	else
		860	break;
		861
		862	if (ANHE_at (he) <= minat)
		863	break;
		864
		865	heap [k] = *minpos;
		866	ev_active (ANHE_w (*minpos)) = k;
		867
		868	k = minpos - heap;
		869	}
		870
		871	heap [k] = he;
		872	ev_active (ANHE_w (he)) = k;
		873	}
		874
		875	#else // 4HEAP
		876
		877	#define HEAP0 1
		878	#define HPARENT(k) ((k) >> 1)
		879
		880	/* towards the root */
		881	void inline_speed
		882	upheap (ANHE *heap, int k)
		883	{
		884	ANHE he = heap [k];
		885
		886	for (;;)
		887	{
		888	int p = HPARENT (k);
		889
		890	/* maybe we could use a dummy element at heap [0]? */
		891	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		892	break;
		893
		894	heap [k] = heap [p];
		895	ev_active (ANHE_w (heap [k])) = k;
		896	k = p;
		897	}
		898
		899	heap [k] = he;
		900	ev_active (ANHE_w (heap [k])) = k;
		901	}
		902
		903	/* away from the root */
		904	void inline_speed
		905	downheap (ANHE *heap, int N, int k)
		906	{
		907	ANHE he = heap [k];
		908
		909	for (;;)
		910	{
		911	int c = k << 1;
		912
		913	if (c > N)
		914	break;
		915
		916	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		917	? 1 : 0;
		918
		919	if (ANHE_at (he) <= ANHE_at (heap [c]))
		920	break;
		921
		922	heap [k] = heap [c];
		923	ev_active (ANHE_w (heap [k])) = k;
		924
		925	k = c;
		926	}
		927
		928	heap [k] = he;
		929	ev_active (ANHE_w (he)) = k;
		930	}
		931	#endif
		932
		933	void inline_size
569	adjustheap (WT *heap, int N, int k)	934	adjustheap (ANHE *heap, int N, int k)
570	{	935	{
		936	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
571	upheap (heap, k);	937	upheap (heap, k);
		938	else
572	downheap (heap, N, k);	939	downheap (heap, N, k);
573	}	940	}
574		941
575	/*****************************************************************************/	942	/*****************************************************************************/
576		943
577	typedef struct	944	typedef struct
578	{	945	{
579	WL head;	946	WL head;
580	sig_atomic_t volatile gotsig;	947	EV_ATOMIC_T gotsig;
581	} ANSIG;	948	} ANSIG;
582		949
583	static ANSIG *signals;	950	static ANSIG *signals;
584	static int signalmax;	951	static int signalmax;
585		952
586	static int sigpipe [2];	953	static EV_ATOMIC_T gotsig;
587	static sig_atomic_t volatile gotsig;
588	static struct ev_io sigev;
589		954
590	static void	955	void inline_size
591	signals_init (ANSIG *base, int count)	956	signals_init (ANSIG *base, int count)
592	{	957	{
593	while (count--)	958	while (count--)
594	{	959	{
595	base->head = 0;	960	base->head = 0;
…		…
597		962
598	++base;	963	++base;
599	}	964	}
600	}	965	}
601		966
602	static void	967	/*****************************************************************************/
603	sighandler (int signum)
604	{
605	#if _WIN32
606	signal (signum, sighandler);
607	#endif
608		968
609	signals [signum - 1].gotsig = 1;	969	void inline_speed
610
611	if (!gotsig)
612	{
613	int old_errno = errno;
614	gotsig = 1;
615	write (sigpipe [1], &signum, 1);
616	errno = old_errno;
617	}
618	}
619
620	void
621	ev_feed_signal_event (EV_P_ int signum)
622	{
623	WL w;
624
625	#if EV_MULTIPLICITY
626	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
627	#endif
628
629	--signum;
630
631	if (signum < 0 || signum >= signalmax)
632	return;
633
634	signals [signum].gotsig = 0;
635
636	for (w = signals [signum].head; w; w = w->next)
637	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
638	}
639
640	static void
641	sigcb (EV_P_ struct ev_io *iow, int revents)
642	{
643	int signum;
644
645	read (sigpipe [0], &revents, 1);
646	gotsig = 0;
647
648	for (signum = signalmax; signum--; )
649	if (signals [signum].gotsig)
650	ev_feed_signal_event (EV_A_ signum + 1);
651	}
652
653	static void
654	fd_intern (int fd)	970	fd_intern (int fd)
655	{	971	{
656	#ifdef _WIN32	972	#ifdef _WIN32
657	int arg = 1;	973	int arg = 1;
658	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	974	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
660	fcntl (fd, F_SETFD, FD_CLOEXEC);	976	fcntl (fd, F_SETFD, FD_CLOEXEC);
661	fcntl (fd, F_SETFL, O_NONBLOCK);	977	fcntl (fd, F_SETFL, O_NONBLOCK);
662	#endif	978	#endif
663	}	979	}
664		980
		981	static void noinline
		982	evpipe_init (EV_P)
		983	{
		984	if (!ev_is_active (&pipeev))
		985	{
		986	#if EV_USE_EVENTFD
		987	if ((evfd = eventfd (0, 0)) >= 0)
		988	{
		989	evpipe [0] = -1;
		990	fd_intern (evfd);
		991	ev_io_set (&pipeev, evfd, EV_READ);
		992	}
		993	else
		994	#endif
		995	{
		996	while (pipe (evpipe))
		997	syserr ("(libev) error creating signal/async pipe");
		998
		999	fd_intern (evpipe [0]);
		1000	fd_intern (evpipe [1]);
		1001	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1002	}
		1003
		1004	ev_io_start (EV_A_ &pipeev);
		1005	ev_unref (EV_A); /* watcher should not keep loop alive */
		1006	}
		1007	}
		1008
		1009	void inline_size
		1010	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1011	{
		1012	if (!*flag)
		1013	{
		1014	int old_errno = errno; /* save errno because write might clobber it */
		1015
		1016	*flag = 1;
		1017
		1018	#if EV_USE_EVENTFD
		1019	if (evfd >= 0)
		1020	{
		1021	uint64_t counter = 1;
		1022	write (evfd, &counter, sizeof (uint64_t));
		1023	}
		1024	else
		1025	#endif
		1026	write (evpipe [1], &old_errno, 1);
		1027
		1028	errno = old_errno;
		1029	}
		1030	}
		1031
665	static void	1032	static void
666	siginit (EV_P)	1033	pipecb (EV_P_ ev_io *iow, int revents)
667	{	1034	{
668	fd_intern (sigpipe [0]);	1035	#if EV_USE_EVENTFD
669	fd_intern (sigpipe [1]);	1036	if (evfd >= 0)
		1037	{
		1038	uint64_t counter;
		1039	read (evfd, &counter, sizeof (uint64_t));
		1040	}
		1041	else
		1042	#endif
		1043	{
		1044	char dummy;
		1045	read (evpipe [0], &dummy, 1);
		1046	}
670		1047
671	ev_io_set (&sigev, sigpipe [0], EV_READ);	1048	if (gotsig && ev_is_default_loop (EV_A))
672	ev_io_start (EV_A_ &sigev);	1049	{
673	ev_unref (EV_A); /* child watcher should not keep loop alive */	1050	int signum;
		1051	gotsig = 0;
		1052
		1053	for (signum = signalmax; signum--; )
		1054	if (signals [signum].gotsig)
		1055	ev_feed_signal_event (EV_A_ signum + 1);
		1056	}
		1057
		1058	#if EV_ASYNC_ENABLE
		1059	if (gotasync)
		1060	{
		1061	int i;
		1062	gotasync = 0;
		1063
		1064	for (i = asynccnt; i--; )
		1065	if (asyncs [i]->sent)
		1066	{
		1067	asyncs [i]->sent = 0;
		1068	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1069	}
		1070	}
		1071	#endif
674	}	1072	}
675		1073
676	/*****************************************************************************/	1074	/*****************************************************************************/
677		1075
678	static struct ev_child *childs [PID_HASHSIZE];	1076	static void
		1077	ev_sighandler (int signum)
		1078	{
		1079	#if EV_MULTIPLICITY
		1080	struct ev_loop *loop = &default_loop_struct;
		1081	#endif
		1082
		1083	#if _WIN32
		1084	signal (signum, ev_sighandler);
		1085	#endif
		1086
		1087	signals [signum - 1].gotsig = 1;
		1088	evpipe_write (EV_A_ &gotsig);
		1089	}
		1090
		1091	void noinline
		1092	ev_feed_signal_event (EV_P_ int signum)
		1093	{
		1094	WL w;
		1095
		1096	#if EV_MULTIPLICITY
		1097	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1098	#endif
		1099
		1100	--signum;
		1101
		1102	if (signum < 0 || signum >= signalmax)
		1103	return;
		1104
		1105	signals [signum].gotsig = 0;
		1106
		1107	for (w = signals [signum].head; w; w = w->next)
		1108	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1109	}
		1110
		1111	/*****************************************************************************/
		1112
		1113	static WL childs [EV_PID_HASHSIZE];
679		1114
680	#ifndef _WIN32	1115	#ifndef _WIN32
681		1116
682	static struct ev_signal childev;	1117	static ev_signal childev;
		1118
		1119	#ifndef WIFCONTINUED
		1120	# define WIFCONTINUED(status) 0
		1121	#endif
		1122
		1123	void inline_speed
		1124	child_reap (EV_P_ int chain, int pid, int status)
		1125	{
		1126	ev_child *w;
		1127	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1128
		1129	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1130	{
		1131	if ((w->pid == pid || !w->pid)
		1132	&& (!traced || (w->flags & 1)))
		1133	{
		1134	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1135	w->rpid = pid;
		1136	w->rstatus = status;
		1137	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1138	}
		1139	}
		1140	}
683		1141
684	#ifndef WCONTINUED	1142	#ifndef WCONTINUED
685	# define WCONTINUED 0	1143	# define WCONTINUED 0
686	#endif	1144	#endif
687		1145
688	static void	1146	static void
689	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
690	{
691	struct ev_child *w;
692
693	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
694	if (w->pid == pid || !w->pid)
695	{
696	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
697	w->rpid = pid;
698	w->rstatus = status;
699	ev_feed_event (EV_A_ (W)w, EV_CHILD);
700	}
701	}
702
703	static void
704	childcb (EV_P_ struct ev_signal *sw, int revents)	1147	childcb (EV_P_ ev_signal *sw, int revents)
705	{	1148	{
706	int pid, status;	1149	int pid, status;
707		1150
		1151	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
708	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1152	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
709	{	1153	if (!WCONTINUED
		1154	|| errno != EINVAL
		1155	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1156	return;
		1157
710	/* make sure we are called again until all childs have been reaped */	1158	/* make sure we are called again until all children have been reaped */
		1159	/* we need to do it this way so that the callback gets called before we continue */
711	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1160	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
712		1161
713	child_reap (EV_A_ sw, pid, pid, status);	1162	child_reap (EV_A_ pid, pid, status);
		1163	if (EV_PID_HASHSIZE > 1)
714	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1164	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
715	}
716	}	1165	}
717		1166
718	#endif	1167	#endif
719		1168
720	/*****************************************************************************/	1169	/*****************************************************************************/
…		…
746	{	1195	{
747	return EV_VERSION_MINOR;	1196	return EV_VERSION_MINOR;
748	}	1197	}
749		1198
750	/* return true if we are running with elevated privileges and should ignore env variables */	1199	/* return true if we are running with elevated privileges and should ignore env variables */
751	static int	1200	int inline_size
752	enable_secure (void)	1201	enable_secure (void)
753	{	1202	{
754	#ifdef _WIN32	1203	#ifdef _WIN32
755	return 0;	1204	return 0;
756	#else	1205	#else
…		…
758	|| getgid () != getegid ();	1207	|| getgid () != getegid ();
759	#endif	1208	#endif
760	}	1209	}
761		1210
762	unsigned int	1211	unsigned int
763	ev_method (EV_P)	1212	ev_supported_backends (void)
764	{	1213	{
765	return method;	1214	unsigned int flags = 0;
766	}
767		1215
768	static void	1216	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1217	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1218	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1219	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1220	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1221
		1222	return flags;
		1223	}
		1224
		1225	unsigned int
		1226	ev_recommended_backends (void)
		1227	{
		1228	unsigned int flags = ev_supported_backends ();
		1229
		1230	#ifndef __NetBSD__
		1231	/* kqueue is borked on everything but netbsd apparently */
		1232	/* it usually doesn't work correctly on anything but sockets and pipes */
		1233	flags &= ~EVBACKEND_KQUEUE;
		1234	#endif
		1235	#ifdef __APPLE__
		1236	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1237	flags &= ~EVBACKEND_POLL;
		1238	#endif
		1239
		1240	return flags;
		1241	}
		1242
		1243	unsigned int
		1244	ev_embeddable_backends (void)
		1245	{
		1246	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1247
		1248	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1249	/* please fix it and tell me how to detect the fix */
		1250	flags &= ~EVBACKEND_EPOLL;
		1251
		1252	return flags;
		1253	}
		1254
		1255	unsigned int
		1256	ev_backend (EV_P)
		1257	{
		1258	return backend;
		1259	}
		1260
		1261	unsigned int
		1262	ev_loop_count (EV_P)
		1263	{
		1264	return loop_count;
		1265	}
		1266
		1267	void
		1268	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1269	{
		1270	io_blocktime = interval;
		1271	}
		1272
		1273	void
		1274	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1275	{
		1276	timeout_blocktime = interval;
		1277	}
		1278
		1279	static void noinline
769	loop_init (EV_P_ unsigned int flags)	1280	loop_init (EV_P_ unsigned int flags)
770	{	1281	{
771	if (!method)	1282	if (!backend)
772	{	1283	{
773	#if EV_USE_MONOTONIC	1284	#if EV_USE_MONOTONIC
774	{	1285	{
775	struct timespec ts;	1286	struct timespec ts;
776	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1287	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
777	have_monotonic = 1;	1288	have_monotonic = 1;
778	}	1289	}
779	#endif	1290	#endif
780		1291
781	ev_rt_now = ev_time ();	1292	ev_rt_now = ev_time ();
782	mn_now = get_clock ();	1293	mn_now = get_clock ();
783	now_floor = mn_now;	1294	now_floor = mn_now;
784	rtmn_diff = ev_rt_now - mn_now;	1295	rtmn_diff = ev_rt_now - mn_now;
785		1296
786	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))	1297	io_blocktime = 0.;
		1298	timeout_blocktime = 0.;
		1299	backend = 0;
		1300	backend_fd = -1;
		1301	gotasync = 0;
		1302	#if EV_USE_INOTIFY
		1303	fs_fd = -2;
		1304	#endif
		1305
		1306	/* pid check not overridable via env */
		1307	#ifndef _WIN32
		1308	if (flags & EVFLAG_FORKCHECK)
		1309	curpid = getpid ();
		1310	#endif
		1311
		1312	if (!(flags & EVFLAG_NOENV)
		1313	&& !enable_secure ()
		1314	&& getenv ("LIBEV_FLAGS"))
787	flags = atoi (getenv ("LIBEV_FLAGS"));	1315	flags = atoi (getenv ("LIBEV_FLAGS"));
788		1316
789	if (!(flags & 0x0000ffff))	1317	if (!(flags & 0x0000ffffU))
790	flags |= 0x0000ffff;	1318	flags |= ev_recommended_backends ();
791		1319
792	method = 0;
793	#if EV_USE_PORT	1320	#if EV_USE_PORT
794	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);	1321	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
795	#endif	1322	#endif
796	#if EV_USE_KQUEUE	1323	#if EV_USE_KQUEUE
797	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);	1324	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
798	#endif	1325	#endif
799	#if EV_USE_EPOLL	1326	#if EV_USE_EPOLL
800	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);	1327	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
801	#endif	1328	#endif
802	#if EV_USE_POLL	1329	#if EV_USE_POLL
803	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);	1330	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
804	#endif	1331	#endif
805	#if EV_USE_SELECT	1332	#if EV_USE_SELECT
806	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);	1333	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
807	#endif	1334	#endif
808		1335
809	ev_init (&sigev, sigcb);	1336	ev_init (&pipeev, pipecb);
810	ev_set_priority (&sigev, EV_MAXPRI);	1337	ev_set_priority (&pipeev, EV_MAXPRI);
811	}	1338	}
812	}	1339	}
813		1340
814	static void	1341	static void noinline
815	loop_destroy (EV_P)	1342	loop_destroy (EV_P)
816	{	1343	{
817	int i;	1344	int i;
818		1345
		1346	if (ev_is_active (&pipeev))
		1347	{
		1348	ev_ref (EV_A); /* signal watcher */
		1349	ev_io_stop (EV_A_ &pipeev);
		1350
		1351	#if EV_USE_EVENTFD
		1352	if (evfd >= 0)
		1353	close (evfd);
		1354	#endif
		1355
		1356	if (evpipe [0] >= 0)
		1357	{
		1358	close (evpipe [0]);
		1359	close (evpipe [1]);
		1360	}
		1361	}
		1362
		1363	#if EV_USE_INOTIFY
		1364	if (fs_fd >= 0)
		1365	close (fs_fd);
		1366	#endif
		1367
		1368	if (backend_fd >= 0)
		1369	close (backend_fd);
		1370
819	#if EV_USE_PORT	1371	#if EV_USE_PORT
820	if (method == EVMETHOD_PORT ) port_destroy (EV_A);	1372	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
821	#endif	1373	#endif
822	#if EV_USE_KQUEUE	1374	#if EV_USE_KQUEUE
823	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1375	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
824	#endif	1376	#endif
825	#if EV_USE_EPOLL	1377	#if EV_USE_EPOLL
826	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1378	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
827	#endif	1379	#endif
828	#if EV_USE_POLL	1380	#if EV_USE_POLL
829	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1381	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
830	#endif	1382	#endif
831	#if EV_USE_SELECT	1383	#if EV_USE_SELECT
832	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1384	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
833	#endif	1385	#endif
834		1386
835	for (i = NUMPRI; i--; )	1387	for (i = NUMPRI; i--; )
		1388	{
836	array_free (pending, [i]);	1389	array_free (pending, [i]);
		1390	#if EV_IDLE_ENABLE
		1391	array_free (idle, [i]);
		1392	#endif
		1393	}
		1394
		1395	ev_free (anfds); anfdmax = 0;
837		1396
838	/* have to use the microsoft-never-gets-it-right macro */	1397	/* have to use the microsoft-never-gets-it-right macro */
839	array_free (fdchange, EMPTY0);	1398	array_free (fdchange, EMPTY);
840	array_free (timer, EMPTY0);	1399	array_free (timer, EMPTY);
841	#if EV_PERIODICS	1400	#if EV_PERIODIC_ENABLE
842	array_free (periodic, EMPTY0);	1401	array_free (periodic, EMPTY);
843	#endif	1402	#endif
		1403	#if EV_FORK_ENABLE
844	array_free (idle, EMPTY0);	1404	array_free (fork, EMPTY);
		1405	#endif
845	array_free (prepare, EMPTY0);	1406	array_free (prepare, EMPTY);
846	array_free (check, EMPTY0);	1407	array_free (check, EMPTY);
		1408	#if EV_ASYNC_ENABLE
		1409	array_free (async, EMPTY);
		1410	#endif
847		1411
848	method = 0;	1412	backend = 0;
849	}	1413	}
850		1414
851	static void	1415	#if EV_USE_INOTIFY
		1416	void inline_size infy_fork (EV_P);
		1417	#endif
		1418
		1419	void inline_size
852	loop_fork (EV_P)	1420	loop_fork (EV_P)
853	{	1421	{
854	#if EV_USE_PORT	1422	#if EV_USE_PORT
855	if (method == EVMETHOD_PORT ) port_fork (EV_A);	1423	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
856	#endif	1424	#endif
857	#if EV_USE_KQUEUE	1425	#if EV_USE_KQUEUE
858	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1426	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
859	#endif	1427	#endif
860	#if EV_USE_EPOLL	1428	#if EV_USE_EPOLL
861	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1429	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
862	#endif	1430	#endif
		1431	#if EV_USE_INOTIFY
		1432	infy_fork (EV_A);
		1433	#endif
863		1434
864	if (ev_is_active (&sigev))	1435	if (ev_is_active (&pipeev))
865	{	1436	{
866	/* default loop */	1437	/* this "locks" the handlers against writing to the pipe */
		1438	/* while we modify the fd vars */
		1439	gotsig = 1;
		1440	#if EV_ASYNC_ENABLE
		1441	gotasync = 1;
		1442	#endif
867		1443
868	ev_ref (EV_A);	1444	ev_ref (EV_A);
869	ev_io_stop (EV_A_ &sigev);	1445	ev_io_stop (EV_A_ &pipeev);
		1446
		1447	#if EV_USE_EVENTFD
		1448	if (evfd >= 0)
		1449	close (evfd);
		1450	#endif
		1451
		1452	if (evpipe [0] >= 0)
		1453	{
870	close (sigpipe [0]);	1454	close (evpipe [0]);
871	close (sigpipe [1]);	1455	close (evpipe [1]);
		1456	}
872		1457
873	while (pipe (sigpipe))
874	syserr ("(libev) error creating pipe");
875
876	siginit (EV_A);	1458	evpipe_init (EV_A);
		1459	/* now iterate over everything, in case we missed something */
		1460	pipecb (EV_A_ &pipeev, EV_READ);
877	}	1461	}
878		1462
879	postfork = 0;	1463	postfork = 0;
880	}	1464	}
881		1465
…		…
887		1471
888	memset (loop, 0, sizeof (struct ev_loop));	1472	memset (loop, 0, sizeof (struct ev_loop));
889		1473
890	loop_init (EV_A_ flags);	1474	loop_init (EV_A_ flags);
891		1475
892	if (ev_method (EV_A))	1476	if (ev_backend (EV_A))
893	return loop;	1477	return loop;
894		1478
895	return 0;	1479	return 0;
896	}	1480	}
897		1481
…		…
903	}	1487	}
904		1488
905	void	1489	void
906	ev_loop_fork (EV_P)	1490	ev_loop_fork (EV_P)
907	{	1491	{
908	postfork = 1;	1492	postfork = 1; /* must be in line with ev_default_fork */
909	}	1493	}
910
911	#endif	1494	#endif
912		1495
913	#if EV_MULTIPLICITY	1496	#if EV_MULTIPLICITY
914	struct ev_loop *	1497	struct ev_loop *
915	ev_default_loop_ (unsigned int flags)	1498	ev_default_loop_init (unsigned int flags)
916	#else	1499	#else
917	int	1500	int
918	ev_default_loop (unsigned int flags)	1501	ev_default_loop (unsigned int flags)
919	#endif	1502	#endif
920	{	1503	{
921	if (sigpipe [0] == sigpipe [1])
922	if (pipe (sigpipe))
923	return 0;
924
925	if (!ev_default_loop_ptr)	1504	if (!ev_default_loop_ptr)
926	{	1505	{
927	#if EV_MULTIPLICITY	1506	#if EV_MULTIPLICITY
928	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1507	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
929	#else	1508	#else
930	ev_default_loop_ptr = 1;	1509	ev_default_loop_ptr = 1;
931	#endif	1510	#endif
932		1511
933	loop_init (EV_A_ flags);	1512	loop_init (EV_A_ flags);
934		1513
935	if (ev_method (EV_A))	1514	if (ev_backend (EV_A))
936	{	1515	{
937	siginit (EV_A);
938
939	#ifndef _WIN32	1516	#ifndef _WIN32
940	ev_signal_init (&childev, childcb, SIGCHLD);	1517	ev_signal_init (&childev, childcb, SIGCHLD);
941	ev_set_priority (&childev, EV_MAXPRI);	1518	ev_set_priority (&childev, EV_MAXPRI);
942	ev_signal_start (EV_A_ &childev);	1519	ev_signal_start (EV_A_ &childev);
943	ev_unref (EV_A); /* child watcher should not keep loop alive */	1520	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
960	#ifndef _WIN32	1537	#ifndef _WIN32
961	ev_ref (EV_A); /* child watcher */	1538	ev_ref (EV_A); /* child watcher */
962	ev_signal_stop (EV_A_ &childev);	1539	ev_signal_stop (EV_A_ &childev);
963	#endif	1540	#endif
964		1541
965	ev_ref (EV_A); /* signal watcher */
966	ev_io_stop (EV_A_ &sigev);
967
968	close (sigpipe [0]); sigpipe [0] = 0;
969	close (sigpipe [1]); sigpipe [1] = 0;
970
971	loop_destroy (EV_A);	1542	loop_destroy (EV_A);
972	}	1543	}
973		1544
974	void	1545	void
975	ev_default_fork (void)	1546	ev_default_fork (void)
976	{	1547	{
977	#if EV_MULTIPLICITY	1548	#if EV_MULTIPLICITY
978	struct ev_loop *loop = ev_default_loop_ptr;	1549	struct ev_loop *loop = ev_default_loop_ptr;
979	#endif	1550	#endif
980		1551
981	if (method)	1552	if (backend)
982	postfork = 1;	1553	postfork = 1; /* must be in line with ev_loop_fork */
983	}	1554	}
984		1555
985	/*****************************************************************************/	1556	/*****************************************************************************/
986		1557
987	static int	1558	void
988	any_pending (EV_P)	1559	ev_invoke (EV_P_ void *w, int revents)
989	{	1560	{
990	int pri;	1561	EV_CB_INVOKE ((W)w, revents);
991
992	for (pri = NUMPRI; pri--; )
993	if (pendingcnt [pri])
994	return 1;
995
996	return 0;
997	}	1562	}
998		1563
999	inline void	1564	void inline_speed
1000	call_pending (EV_P)	1565	call_pending (EV_P)
1001	{	1566	{
1002	int pri;	1567	int pri;
1003		1568
1004	for (pri = NUMPRI; pri--; )	1569	for (pri = NUMPRI; pri--; )
…		…
1006	{	1571	{
1007	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1572	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1008		1573
1009	if (expect_true (p->w))	1574	if (expect_true (p->w))
1010	{	1575	{
		1576	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1577
1011	p->w->pending = 0;	1578	p->w->pending = 0;
1012	EV_CB_INVOKE (p->w, p->events);	1579	EV_CB_INVOKE (p->w, p->events);
1013	}	1580	}
1014	}	1581	}
1015	}	1582	}
1016		1583
1017	inline void	1584	#if EV_IDLE_ENABLE
		1585	void inline_size
		1586	idle_reify (EV_P)
		1587	{
		1588	if (expect_false (idleall))
		1589	{
		1590	int pri;
		1591
		1592	for (pri = NUMPRI; pri--; )
		1593	{
		1594	if (pendingcnt [pri])
		1595	break;
		1596
		1597	if (idlecnt [pri])
		1598	{
		1599	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1600	break;
		1601	}
		1602	}
		1603	}
		1604	}
		1605	#endif
		1606
		1607	void inline_size
1018	timers_reify (EV_P)	1608	timers_reify (EV_P)
1019	{	1609	{
1020	while (timercnt && ((WT)timers [0])->at <= mn_now)	1610	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1021	{	1611	{
1022	struct ev_timer *w = timers [0];	1612	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1023		1613
1024	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1614	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1025		1615
1026	/* first reschedule or stop timer */	1616	/* first reschedule or stop timer */
1027	if (w->repeat)	1617	if (w->repeat)
1028	{	1618	{
		1619	ev_at (w) += w->repeat;
		1620	if (ev_at (w) < mn_now)
		1621	ev_at (w) = mn_now;
		1622
1029	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1623	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1030		1624
1031	((WT)w)->at += w->repeat;	1625	ANHE_at_set (timers [HEAP0]);
1032	if (((WT)w)->at < mn_now)
1033	((WT)w)->at = mn_now;
1034
1035	downheap ((WT *)timers, timercnt, 0);	1626	downheap (timers, timercnt, HEAP0);
1036	}	1627	}
1037	else	1628	else
1038	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1629	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1039		1630
1040	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1631	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1041	}	1632	}
1042	}	1633	}
1043		1634
1044	#if EV_PERIODICS	1635	#if EV_PERIODIC_ENABLE
1045	inline void	1636	void inline_size
1046	periodics_reify (EV_P)	1637	periodics_reify (EV_P)
1047	{	1638	{
1048	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1639	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1049	{	1640	{
1050	struct ev_periodic *w = periodics [0];	1641	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1051		1642
1052	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1643	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1053		1644
1054	/* first reschedule or stop timer */	1645	/* first reschedule or stop timer */
1055	if (w->reschedule_cb)	1646	if (w->reschedule_cb)
1056	{	1647	{
1057	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1648	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1649
1058	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1650	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1651
		1652	ANHE_at_set (periodics [HEAP0]);
1059	downheap ((WT *)periodics, periodiccnt, 0);	1653	downheap (periodics, periodiccnt, HEAP0);
1060	}	1654	}
1061	else if (w->interval)	1655	else if (w->interval)
1062	{	1656	{
1063	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1657	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1064	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1658	/* if next trigger time is not sufficiently in the future, put it there */
		1659	/* this might happen because of floating point inexactness */
		1660	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1661	{
		1662	ev_at (w) += w->interval;
		1663
		1664	/* if interval is unreasonably low we might still have a time in the past */
		1665	/* so correct this. this will make the periodic very inexact, but the user */
		1666	/* has effectively asked to get triggered more often than possible */
		1667	if (ev_at (w) < ev_rt_now)
		1668	ev_at (w) = ev_rt_now;
		1669	}
		1670
		1671	ANHE_at_set (periodics [HEAP0]);
1065	downheap ((WT *)periodics, periodiccnt, 0);	1672	downheap (periodics, periodiccnt, HEAP0);
1066	}	1673	}
1067	else	1674	else
1068	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1675	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1069		1676
1070	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1677	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1071	}	1678	}
1072	}	1679	}
1073		1680
1074	static void	1681	static void noinline
1075	periodics_reschedule (EV_P)	1682	periodics_reschedule (EV_P)
1076	{	1683	{
1077	int i;	1684	int i;
1078		1685
1079	/* adjust periodics after time jump */	1686	/* adjust periodics after time jump */
		1687	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1688	{
		1689	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1690
		1691	if (w->reschedule_cb)
		1692	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1693	else if (w->interval)
		1694	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1695
		1696	ANHE_at_set (periodics [i]);
		1697	}
		1698
		1699	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1700	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
1080	for (i = 0; i < periodiccnt; ++i)	1701	for (i = 0; i < periodiccnt; ++i)
1081	{	1702	upheap (periodics, i + HEAP0);
1082	struct ev_periodic *w = periodics [i];	1703	}
		1704	#endif
1083		1705
1084	if (w->reschedule_cb)	1706	void inline_speed
1085	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1707	time_update (EV_P_ ev_tstamp max_block)
1086	else if (w->interval)	1708	{
1087	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1709	int i;
		1710
		1711	#if EV_USE_MONOTONIC
		1712	if (expect_true (have_monotonic))
1088	}	1713	{
		1714	ev_tstamp odiff = rtmn_diff;
1089		1715
1090	/* now rebuild the heap */
1091	for (i = periodiccnt >> 1; i--; )
1092	downheap ((WT *)periodics, periodiccnt, i);
1093	}
1094	#endif
1095
1096	inline int
1097	time_update_monotonic (EV_P)
1098	{
1099	mn_now = get_clock ();	1716	mn_now = get_clock ();
1100		1717
		1718	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1719	/* interpolate in the meantime */
1101	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1720	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1102	{	1721	{
1103	ev_rt_now = rtmn_diff + mn_now;	1722	ev_rt_now = rtmn_diff + mn_now;
1104	return 0;	1723	return;
1105	}	1724	}
1106	else	1725
1107	{
1108	now_floor = mn_now;	1726	now_floor = mn_now;
1109	ev_rt_now = ev_time ();	1727	ev_rt_now = ev_time ();
1110	return 1;
1111	}
1112	}
1113		1728
1114	inline void	1729	/* loop a few times, before making important decisions.
1115	time_update (EV_P)	1730	* on the choice of "4": one iteration isn't enough,
1116	{	1731	* in case we get preempted during the calls to
1117	int i;	1732	* ev_time and get_clock. a second call is almost guaranteed
1118		1733	* to succeed in that case, though. and looping a few more times
1119	#if EV_USE_MONOTONIC	1734	* doesn't hurt either as we only do this on time-jumps or
1120	if (expect_true (have_monotonic))	1735	* in the unlikely event of having been preempted here.
1121	{	1736	*/
1122	if (time_update_monotonic (EV_A))	1737	for (i = 4; --i; )
1123	{	1738	{
1124	ev_tstamp odiff = rtmn_diff;	1739	rtmn_diff = ev_rt_now - mn_now;
1125		1740
1126	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1741	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1742	return; /* all is well */
		1743
		1744	ev_rt_now = ev_time ();
		1745	mn_now = get_clock ();
		1746	now_floor = mn_now;
		1747	}
		1748
		1749	# if EV_PERIODIC_ENABLE
		1750	periodics_reschedule (EV_A);
		1751	# endif
		1752	/* no timer adjustment, as the monotonic clock doesn't jump */
		1753	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1754	}
		1755	else
		1756	#endif
		1757	{
		1758	ev_rt_now = ev_time ();
		1759
		1760	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1761	{
		1762	#if EV_PERIODIC_ENABLE
		1763	periodics_reschedule (EV_A);
		1764	#endif
		1765	/* adjust timers. this is easy, as the offset is the same for all of them */
		1766	for (i = 0; i < timercnt; ++i)
1127	{	1767	{
1128	rtmn_diff = ev_rt_now - mn_now;	1768	ANHE *he = timers + i + HEAP0;
1129		1769	ANHE_w (*he)->at += ev_rt_now - mn_now;
1130	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1770	ANHE_at_set (*he);
1131	return; /* all is well */
1132
1133	ev_rt_now = ev_time ();
1134	mn_now = get_clock ();
1135	now_floor = mn_now;
1136	}	1771	}
1137
1138	# if EV_PERIODICS
1139	periodics_reschedule (EV_A);
1140	# endif
1141	/* no timer adjustment, as the monotonic clock doesn't jump */
1142	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1143	}	1772	}
1144	}
1145	else
1146	#endif
1147	{
1148	ev_rt_now = ev_time ();
1149
1150	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1151	{
1152	#if EV_PERIODICS
1153	periodics_reschedule (EV_A);
1154	#endif
1155
1156	/* adjust timers. this is easy, as the offset is the same for all */
1157	for (i = 0; i < timercnt; ++i)
1158	((WT)timers [i])->at += ev_rt_now - mn_now;
1159	}
1160		1773
1161	mn_now = ev_rt_now;	1774	mn_now = ev_rt_now;
1162	}	1775	}
1163	}	1776	}
1164		1777
…		…
1177	static int loop_done;	1790	static int loop_done;
1178		1791
1179	void	1792	void
1180	ev_loop (EV_P_ int flags)	1793	ev_loop (EV_P_ int flags)
1181	{	1794	{
1182	double block;	1795	loop_done = EVUNLOOP_CANCEL;
1183	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1184		1796
1185	while (activecnt)	1797	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1798
		1799	do
1186	{	1800	{
		1801	#ifndef _WIN32
		1802	if (expect_false (curpid)) /* penalise the forking check even more */
		1803	if (expect_false (getpid () != curpid))
		1804	{
		1805	curpid = getpid ();
		1806	postfork = 1;
		1807	}
		1808	#endif
		1809
		1810	#if EV_FORK_ENABLE
		1811	/* we might have forked, so queue fork handlers */
		1812	if (expect_false (postfork))
		1813	if (forkcnt)
		1814	{
		1815	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1816	call_pending (EV_A);
		1817	}
		1818	#endif
		1819
1187	/* queue check watchers (and execute them) */	1820	/* queue prepare watchers (and execute them) */
1188	if (expect_false (preparecnt))	1821	if (expect_false (preparecnt))
1189	{	1822	{
1190	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1823	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1191	call_pending (EV_A);	1824	call_pending (EV_A);
1192	}	1825	}
1193		1826
		1827	if (expect_false (!activecnt))
		1828	break;
		1829
1194	/* we might have forked, so reify kernel state if necessary */	1830	/* we might have forked, so reify kernel state if necessary */
1195	if (expect_false (postfork))	1831	if (expect_false (postfork))
1196	loop_fork (EV_A);	1832	loop_fork (EV_A);
1197		1833
1198	/* update fd-related kernel structures */	1834	/* update fd-related kernel structures */
1199	fd_reify (EV_A);	1835	fd_reify (EV_A);
1200		1836
1201	/* calculate blocking time */	1837	/* calculate blocking time */
		1838	{
		1839	ev_tstamp waittime = 0.;
		1840	ev_tstamp sleeptime = 0.;
1202		1841
1203	/* we only need this for !monotonic clock or timers, but as we basically	1842	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1204	always have timers, we just calculate it always */
1205	#if EV_USE_MONOTONIC
1206	if (expect_true (have_monotonic))
1207	time_update_monotonic (EV_A);
1208	else
1209	#endif
1210	{	1843	{
1211	ev_rt_now = ev_time ();	1844	/* update time to cancel out callback processing overhead */
1212	mn_now = ev_rt_now;	1845	time_update (EV_A_ 1e100);
1213	}
1214		1846
1215	if (flags & EVLOOP_NONBLOCK || idlecnt)
1216	block = 0.;
1217	else
1218	{
1219	block = MAX_BLOCKTIME;	1847	waittime = MAX_BLOCKTIME;
1220		1848
1221	if (timercnt)	1849	if (timercnt)
1222	{	1850	{
1223	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1851	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1224	if (block > to) block = to;	1852	if (waittime > to) waittime = to;
1225	}	1853	}
1226		1854
1227	#if EV_PERIODICS	1855	#if EV_PERIODIC_ENABLE
1228	if (periodiccnt)	1856	if (periodiccnt)
1229	{	1857	{
1230	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1858	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1231	if (block > to) block = to;	1859	if (waittime > to) waittime = to;
1232	}	1860	}
1233	#endif	1861	#endif
1234		1862
1235	if (expect_false (block < 0.)) block = 0.;	1863	if (expect_false (waittime < timeout_blocktime))
		1864	waittime = timeout_blocktime;
		1865
		1866	sleeptime = waittime - backend_fudge;
		1867
		1868	if (expect_true (sleeptime > io_blocktime))
		1869	sleeptime = io_blocktime;
		1870
		1871	if (sleeptime)
		1872	{
		1873	ev_sleep (sleeptime);
		1874	waittime -= sleeptime;
		1875	}
1236	}	1876	}
1237		1877
1238	method_poll (EV_A_ block);	1878	++loop_count;
		1879	backend_poll (EV_A_ waittime);
1239		1880
1240	/* update ev_rt_now, do magic */	1881	/* update ev_rt_now, do magic */
1241	time_update (EV_A);	1882	time_update (EV_A_ waittime + sleeptime);
		1883	}
1242		1884
1243	/* queue pending timers and reschedule them */	1885	/* queue pending timers and reschedule them */
1244	timers_reify (EV_A); /* relative timers called last */	1886	timers_reify (EV_A); /* relative timers called last */
1245	#if EV_PERIODICS	1887	#if EV_PERIODIC_ENABLE
1246	periodics_reify (EV_A); /* absolute timers called first */	1888	periodics_reify (EV_A); /* absolute timers called first */
1247	#endif	1889	#endif
1248		1890
		1891	#if EV_IDLE_ENABLE
1249	/* queue idle watchers unless io or timers are pending */	1892	/* queue idle watchers unless other events are pending */
1250	if (idlecnt && !any_pending (EV_A))	1893	idle_reify (EV_A);
1251	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1894	#endif
1252		1895
1253	/* queue check watchers, to be executed first */	1896	/* queue check watchers, to be executed first */
1254	if (expect_false (checkcnt))	1897	if (expect_false (checkcnt))
1255	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1898	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1256		1899
1257	call_pending (EV_A);	1900	call_pending (EV_A);
1258
1259	if (expect_false (loop_done))
1260	break;
1261	}	1901	}
		1902	while (expect_true (
		1903	activecnt
		1904	&& !loop_done
		1905	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1906	));
1262		1907
1263	if (loop_done != 2)	1908	if (loop_done == EVUNLOOP_ONE)
1264	loop_done = 0;	1909	loop_done = EVUNLOOP_CANCEL;
1265	}	1910	}
1266		1911
1267	void	1912	void
1268	ev_unloop (EV_P_ int how)	1913	ev_unloop (EV_P_ int how)
1269	{	1914	{
1270	loop_done = how;	1915	loop_done = how;
1271	}	1916	}
1272		1917
1273	/*****************************************************************************/	1918	/*****************************************************************************/
1274		1919
1275	inline void	1920	void inline_size
1276	wlist_add (WL *head, WL elem)	1921	wlist_add (WL *head, WL elem)
1277	{	1922	{
1278	elem->next = *head;	1923	elem->next = *head;
1279	*head = elem;	1924	*head = elem;
1280	}	1925	}
1281		1926
1282	inline void	1927	void inline_size
1283	wlist_del (WL *head, WL elem)	1928	wlist_del (WL *head, WL elem)
1284	{	1929	{
1285	while (*head)	1930	while (*head)
1286	{	1931	{
1287	if (*head == elem)	1932	if (*head == elem)
…		…
1292		1937
1293	head = &(*head)->next;	1938	head = &(*head)->next;
1294	}	1939	}
1295	}	1940	}
1296		1941
1297	inline void	1942	void inline_speed
1298	ev_clear_pending (EV_P_ W w)	1943	clear_pending (EV_P_ W w)
1299	{	1944	{
1300	if (w->pending)	1945	if (w->pending)
1301	{	1946	{
1302	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1947	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1303	w->pending = 0;	1948	w->pending = 0;
1304	}	1949	}
1305	}	1950	}
1306		1951
1307	inline void	1952	int
		1953	ev_clear_pending (EV_P_ void *w)
		1954	{
		1955	W w_ = (W)w;
		1956	int pending = w_->pending;
		1957
		1958	if (expect_true (pending))
		1959	{
		1960	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1961	w_->pending = 0;
		1962	p->w = 0;
		1963	return p->events;
		1964	}
		1965	else
		1966	return 0;
		1967	}
		1968
		1969	void inline_size
		1970	pri_adjust (EV_P_ W w)
		1971	{
		1972	int pri = w->priority;
		1973	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1974	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1975	w->priority = pri;
		1976	}
		1977
		1978	void inline_speed
1308	ev_start (EV_P_ W w, int active)	1979	ev_start (EV_P_ W w, int active)
1309	{	1980	{
1310	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1981	pri_adjust (EV_A_ w);
1311	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1312
1313	w->active = active;	1982	w->active = active;
1314	ev_ref (EV_A);	1983	ev_ref (EV_A);
1315	}	1984	}
1316		1985
1317	inline void	1986	void inline_size
1318	ev_stop (EV_P_ W w)	1987	ev_stop (EV_P_ W w)
1319	{	1988	{
1320	ev_unref (EV_A);	1989	ev_unref (EV_A);
1321	w->active = 0;	1990	w->active = 0;
1322	}	1991	}
1323		1992
1324	/*****************************************************************************/	1993	/*****************************************************************************/
1325		1994
1326	void	1995	void noinline
1327	ev_io_start (EV_P_ struct ev_io *w)	1996	ev_io_start (EV_P_ ev_io *w)
1328	{	1997	{
1329	int fd = w->fd;	1998	int fd = w->fd;
1330		1999
1331	if (expect_false (ev_is_active (w)))	2000	if (expect_false (ev_is_active (w)))
1332	return;	2001	return;
1333		2002
1334	assert (("ev_io_start called with negative fd", fd >= 0));	2003	assert (("ev_io_start called with negative fd", fd >= 0));
1335		2004
1336	ev_start (EV_A_ (W)w, 1);	2005	ev_start (EV_A_ (W)w, 1);
1337	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2006	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1338	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2007	wlist_add (&anfds[fd].head, (WL)w);
1339		2008
1340	fd_change (EV_A_ fd);	2009	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		2010	w->events &= ~EV_IOFDSET;
1341	}	2011	}
1342		2012
1343	void	2013	void noinline
1344	ev_io_stop (EV_P_ struct ev_io *w)	2014	ev_io_stop (EV_P_ ev_io *w)
1345	{	2015	{
1346	ev_clear_pending (EV_A_ (W)w);	2016	clear_pending (EV_A_ (W)w);
1347	if (expect_false (!ev_is_active (w)))	2017	if (expect_false (!ev_is_active (w)))
1348	return;	2018	return;
1349		2019
1350	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2020	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1351		2021
1352	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2022	wlist_del (&anfds[w->fd].head, (WL)w);
1353	ev_stop (EV_A_ (W)w);	2023	ev_stop (EV_A_ (W)w);
1354		2024
1355	fd_change (EV_A_ w->fd);	2025	fd_change (EV_A_ w->fd, 1);
1356	}	2026	}
1357		2027
1358	void	2028	void noinline
1359	ev_timer_start (EV_P_ struct ev_timer *w)	2029	ev_timer_start (EV_P_ ev_timer *w)
1360	{	2030	{
1361	if (expect_false (ev_is_active (w)))	2031	if (expect_false (ev_is_active (w)))
1362	return;	2032	return;
1363		2033
1364	((WT)w)->at += mn_now;	2034	ev_at (w) += mn_now;
1365		2035
1366	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2036	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1367		2037
1368	ev_start (EV_A_ (W)w, ++timercnt);	2038	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1369	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2039	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1370	timers [timercnt - 1] = w;	2040	ANHE_w (timers [ev_active (w)]) = (WT)w;
1371	upheap ((WT *)timers, timercnt - 1);	2041	ANHE_at_set (timers [ev_active (w)]);
		2042	upheap (timers, ev_active (w));
1372		2043
1373	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2044	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1374	}	2045	}
1375		2046
1376	void	2047	void noinline
1377	ev_timer_stop (EV_P_ struct ev_timer *w)	2048	ev_timer_stop (EV_P_ ev_timer *w)
1378	{	2049	{
1379	ev_clear_pending (EV_A_ (W)w);	2050	clear_pending (EV_A_ (W)w);
1380	if (expect_false (!ev_is_active (w)))	2051	if (expect_false (!ev_is_active (w)))
1381	return;	2052	return;
1382		2053
		2054	{
		2055	int active = ev_active (w);
		2056
1383	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2057	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1384		2058
1385	if (expect_true (((W)w)->active < timercnt--))	2059	if (expect_true (active < timercnt + HEAP0 - 1))
1386	{	2060	{
1387	timers [((W)w)->active - 1] = timers [timercnt];	2061	timers [active] = timers [timercnt + HEAP0 - 1];
1388	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2062	adjustheap (timers, timercnt, active);
1389	}	2063	}
1390		2064
1391	((WT)w)->at -= mn_now;	2065	--timercnt;
		2066	}
		2067
		2068	ev_at (w) -= mn_now;
1392		2069
1393	ev_stop (EV_A_ (W)w);	2070	ev_stop (EV_A_ (W)w);
1394	}	2071	}
1395		2072
1396	void	2073	void noinline
1397	ev_timer_again (EV_P_ struct ev_timer *w)	2074	ev_timer_again (EV_P_ ev_timer *w)
1398	{	2075	{
1399	if (ev_is_active (w))	2076	if (ev_is_active (w))
1400	{	2077	{
1401	if (w->repeat)	2078	if (w->repeat)
1402	{	2079	{
1403	((WT)w)->at = mn_now + w->repeat;	2080	ev_at (w) = mn_now + w->repeat;
		2081	ANHE_at_set (timers [ev_active (w)]);
1404	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2082	adjustheap (timers, timercnt, ev_active (w));
1405	}	2083	}
1406	else	2084	else
1407	ev_timer_stop (EV_A_ w);	2085	ev_timer_stop (EV_A_ w);
1408	}	2086	}
1409	else if (w->repeat)	2087	else if (w->repeat)
1410	{	2088	{
1411	w->at = w->repeat;	2089	ev_at (w) = w->repeat;
1412	ev_timer_start (EV_A_ w);	2090	ev_timer_start (EV_A_ w);
1413	}	2091	}
1414	}	2092	}
1415		2093
1416	#if EV_PERIODICS	2094	#if EV_PERIODIC_ENABLE
1417	void	2095	void noinline
1418	ev_periodic_start (EV_P_ struct ev_periodic *w)	2096	ev_periodic_start (EV_P_ ev_periodic *w)
1419	{	2097	{
1420	if (expect_false (ev_is_active (w)))	2098	if (expect_false (ev_is_active (w)))
1421	return;	2099	return;
1422		2100
1423	if (w->reschedule_cb)	2101	if (w->reschedule_cb)
1424	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2102	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1425	else if (w->interval)	2103	else if (w->interval)
1426	{	2104	{
1427	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2105	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1428	/* this formula differs from the one in periodic_reify because we do not always round up */	2106	/* this formula differs from the one in periodic_reify because we do not always round up */
1429	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2107	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1430	}	2108	}
		2109	else
		2110	ev_at (w) = w->offset;
1431		2111
1432	ev_start (EV_A_ (W)w, ++periodiccnt);	2112	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1433	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2113	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1434	periodics [periodiccnt - 1] = w;	2114	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1435	upheap ((WT *)periodics, periodiccnt - 1);	2115	ANHE_at_set (periodics [ev_active (w)]);
		2116	upheap (periodics, ev_active (w));
1436		2117
1437	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2118	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1438	}	2119	}
1439		2120
1440	void	2121	void noinline
1441	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2122	ev_periodic_stop (EV_P_ ev_periodic *w)
1442	{	2123	{
1443	ev_clear_pending (EV_A_ (W)w);	2124	clear_pending (EV_A_ (W)w);
1444	if (expect_false (!ev_is_active (w)))	2125	if (expect_false (!ev_is_active (w)))
1445	return;	2126	return;
1446		2127
		2128	{
		2129	int active = ev_active (w);
		2130
1447	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2131	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1448		2132
1449	if (expect_true (((W)w)->active < periodiccnt--))	2133	if (expect_true (active < periodiccnt + HEAP0 - 1))
1450	{	2134	{
1451	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2135	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1452	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2136	adjustheap (periodics, periodiccnt, active);
1453	}	2137	}
		2138
		2139	--periodiccnt;
		2140	}
1454		2141
1455	ev_stop (EV_A_ (W)w);	2142	ev_stop (EV_A_ (W)w);
1456	}	2143	}
1457		2144
1458	void	2145	void noinline
1459	ev_periodic_again (EV_P_ struct ev_periodic *w)	2146	ev_periodic_again (EV_P_ ev_periodic *w)
1460	{	2147	{
1461	/* TODO: use adjustheap and recalculation */	2148	/* TODO: use adjustheap and recalculation */
1462	ev_periodic_stop (EV_A_ w);	2149	ev_periodic_stop (EV_A_ w);
1463	ev_periodic_start (EV_A_ w);	2150	ev_periodic_start (EV_A_ w);
1464	}	2151	}
1465	#endif	2152	#endif
1466		2153
1467	void	2154	#ifndef SA_RESTART
1468	ev_idle_start (EV_P_ struct ev_idle *w)	2155	# define SA_RESTART 0
		2156	#endif
		2157
		2158	void noinline
		2159	ev_signal_start (EV_P_ ev_signal *w)
1469	{	2160	{
		2161	#if EV_MULTIPLICITY
		2162	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2163	#endif
1470	if (expect_false (ev_is_active (w)))	2164	if (expect_false (ev_is_active (w)))
1471	return;	2165	return;
1472		2166
1473	ev_start (EV_A_ (W)w, ++idlecnt);
1474	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1475	idles [idlecnt - 1] = w;
1476	}
1477
1478	void
1479	ev_idle_stop (EV_P_ struct ev_idle *w)
1480	{
1481	ev_clear_pending (EV_A_ (W)w);
1482	if (expect_false (!ev_is_active (w)))
1483	return;
1484
1485	idles [((W)w)->active - 1] = idles [--idlecnt];
1486	ev_stop (EV_A_ (W)w);
1487	}
1488
1489	void
1490	ev_prepare_start (EV_P_ struct ev_prepare *w)
1491	{
1492	if (expect_false (ev_is_active (w)))
1493	return;
1494
1495	ev_start (EV_A_ (W)w, ++preparecnt);
1496	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1497	prepares [preparecnt - 1] = w;
1498	}
1499
1500	void
1501	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1502	{
1503	ev_clear_pending (EV_A_ (W)w);
1504	if (expect_false (!ev_is_active (w)))
1505	return;
1506
1507	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1508	ev_stop (EV_A_ (W)w);
1509	}
1510
1511	void
1512	ev_check_start (EV_P_ struct ev_check *w)
1513	{
1514	if (expect_false (ev_is_active (w)))
1515	return;
1516
1517	ev_start (EV_A_ (W)w, ++checkcnt);
1518	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1519	checks [checkcnt - 1] = w;
1520	}
1521
1522	void
1523	ev_check_stop (EV_P_ struct ev_check *w)
1524	{
1525	ev_clear_pending (EV_A_ (W)w);
1526	if (expect_false (!ev_is_active (w)))
1527	return;
1528
1529	checks [((W)w)->active - 1] = checks [--checkcnt];
1530	ev_stop (EV_A_ (W)w);
1531	}
1532
1533	#ifndef SA_RESTART
1534	# define SA_RESTART 0
1535	#endif
1536
1537	void
1538	ev_signal_start (EV_P_ struct ev_signal *w)
1539	{
1540	#if EV_MULTIPLICITY
1541	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1542	#endif
1543	if (expect_false (ev_is_active (w)))
1544	return;
1545
1546	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2167	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1547		2168
		2169	evpipe_init (EV_A);
		2170
		2171	{
		2172	#ifndef _WIN32
		2173	sigset_t full, prev;
		2174	sigfillset (&full);
		2175	sigprocmask (SIG_SETMASK, &full, &prev);
		2176	#endif
		2177
		2178	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2179
		2180	#ifndef _WIN32
		2181	sigprocmask (SIG_SETMASK, &prev, 0);
		2182	#endif
		2183	}
		2184
1548	ev_start (EV_A_ (W)w, 1);	2185	ev_start (EV_A_ (W)w, 1);
1549	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1550	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2186	wlist_add (&signals [w->signum - 1].head, (WL)w);
1551		2187
1552	if (!((WL)w)->next)	2188	if (!((WL)w)->next)
1553	{	2189	{
1554	#if _WIN32	2190	#if _WIN32
1555	signal (w->signum, sighandler);	2191	signal (w->signum, ev_sighandler);
1556	#else	2192	#else
1557	struct sigaction sa;	2193	struct sigaction sa;
1558	sa.sa_handler = sighandler;	2194	sa.sa_handler = ev_sighandler;
1559	sigfillset (&sa.sa_mask);	2195	sigfillset (&sa.sa_mask);
1560	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2196	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1561	sigaction (w->signum, &sa, 0);	2197	sigaction (w->signum, &sa, 0);
1562	#endif	2198	#endif
1563	}	2199	}
1564	}	2200	}
1565		2201
1566	void	2202	void noinline
1567	ev_signal_stop (EV_P_ struct ev_signal *w)	2203	ev_signal_stop (EV_P_ ev_signal *w)
1568	{	2204	{
1569	ev_clear_pending (EV_A_ (W)w);	2205	clear_pending (EV_A_ (W)w);
1570	if (expect_false (!ev_is_active (w)))	2206	if (expect_false (!ev_is_active (w)))
1571	return;	2207	return;
1572		2208
1573	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2209	wlist_del (&signals [w->signum - 1].head, (WL)w);
1574	ev_stop (EV_A_ (W)w);	2210	ev_stop (EV_A_ (W)w);
1575		2211
1576	if (!signals [w->signum - 1].head)	2212	if (!signals [w->signum - 1].head)
1577	signal (w->signum, SIG_DFL);	2213	signal (w->signum, SIG_DFL);
1578	}	2214	}
1579		2215
1580	void	2216	void
1581	ev_child_start (EV_P_ struct ev_child *w)	2217	ev_child_start (EV_P_ ev_child *w)
1582	{	2218	{
1583	#if EV_MULTIPLICITY	2219	#if EV_MULTIPLICITY
1584	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2220	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1585	#endif	2221	#endif
1586	if (expect_false (ev_is_active (w)))	2222	if (expect_false (ev_is_active (w)))
1587	return;	2223	return;
1588		2224
1589	ev_start (EV_A_ (W)w, 1);	2225	ev_start (EV_A_ (W)w, 1);
1590	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2226	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1591	}	2227	}
1592		2228
1593	void	2229	void
1594	ev_child_stop (EV_P_ struct ev_child *w)	2230	ev_child_stop (EV_P_ ev_child *w)
1595	{	2231	{
1596	ev_clear_pending (EV_A_ (W)w);	2232	clear_pending (EV_A_ (W)w);
1597	if (expect_false (!ev_is_active (w)))	2233	if (expect_false (!ev_is_active (w)))
1598	return;	2234	return;
1599		2235
1600	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2236	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1601	ev_stop (EV_A_ (W)w);	2237	ev_stop (EV_A_ (W)w);
1602	}	2238	}
1603		2239
		2240	#if EV_STAT_ENABLE
		2241
		2242	# ifdef _WIN32
		2243	# undef lstat
		2244	# define lstat(a,b) _stati64 (a,b)
		2245	# endif
		2246
		2247	#define DEF_STAT_INTERVAL 5.0074891
		2248	#define MIN_STAT_INTERVAL 0.1074891
		2249
		2250	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2251
		2252	#if EV_USE_INOTIFY
		2253	# define EV_INOTIFY_BUFSIZE 8192
		2254
		2255	static void noinline
		2256	infy_add (EV_P_ ev_stat *w)
		2257	{
		2258	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);
		2259
		2260	if (w->wd < 0)
		2261	{
		2262	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2263
		2264	/* monitor some parent directory for speedup hints */
		2265	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2266	/* but an efficiency issue only */
		2267	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2268	{
		2269	char path [4096];
		2270	strcpy (path, w->path);
		2271
		2272	do
		2273	{
		2274	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2275	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2276
		2277	char *pend = strrchr (path, '/');
		2278
		2279	if (!pend)
		2280	break; /* whoops, no '/', complain to your admin */
		2281
		2282	*pend = 0;
		2283	w->wd = inotify_add_watch (fs_fd, path, mask);
		2284	}
		2285	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2286	}
		2287	}
		2288	else
		2289	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2290
		2291	if (w->wd >= 0)
		2292	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2293	}
		2294
		2295	static void noinline
		2296	infy_del (EV_P_ ev_stat *w)
		2297	{
		2298	int slot;
		2299	int wd = w->wd;
		2300
		2301	if (wd < 0)
		2302	return;
		2303
		2304	w->wd = -2;
		2305	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2306	wlist_del (&fs_hash [slot].head, (WL)w);
		2307
		2308	/* remove this watcher, if others are watching it, they will rearm */
		2309	inotify_rm_watch (fs_fd, wd);
		2310	}
		2311
		2312	static void noinline
		2313	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2314	{
		2315	if (slot < 0)
		2316	/* overflow, need to check for all hahs slots */
		2317	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2318	infy_wd (EV_A_ slot, wd, ev);
		2319	else
		2320	{
		2321	WL w_;
		2322
		2323	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2324	{
		2325	ev_stat *w = (ev_stat *)w_;
		2326	w_ = w_->next; /* lets us remove this watcher and all before it */
		2327
		2328	if (w->wd == wd || wd == -1)
		2329	{
		2330	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2331	{
		2332	w->wd = -1;
		2333	infy_add (EV_A_ w); /* re-add, no matter what */
		2334	}
		2335
		2336	stat_timer_cb (EV_A_ &w->timer, 0);
		2337	}
		2338	}
		2339	}
		2340	}
		2341
		2342	static void
		2343	infy_cb (EV_P_ ev_io *w, int revents)
		2344	{
		2345	char buf [EV_INOTIFY_BUFSIZE];
		2346	struct inotify_event *ev = (struct inotify_event *)buf;
		2347	int ofs;
		2348	int len = read (fs_fd, buf, sizeof (buf));
		2349
		2350	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2351	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2352	}
		2353
		2354	void inline_size
		2355	infy_init (EV_P)
		2356	{
		2357	if (fs_fd != -2)
		2358	return;
		2359
		2360	fs_fd = inotify_init ();
		2361
		2362	if (fs_fd >= 0)
		2363	{
		2364	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2365	ev_set_priority (&fs_w, EV_MAXPRI);
		2366	ev_io_start (EV_A_ &fs_w);
		2367	}
		2368	}
		2369
		2370	void inline_size
		2371	infy_fork (EV_P)
		2372	{
		2373	int slot;
		2374
		2375	if (fs_fd < 0)
		2376	return;
		2377
		2378	close (fs_fd);
		2379	fs_fd = inotify_init ();
		2380
		2381	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2382	{
		2383	WL w_ = fs_hash [slot].head;
		2384	fs_hash [slot].head = 0;
		2385
		2386	while (w_)
		2387	{
		2388	ev_stat *w = (ev_stat *)w_;
		2389	w_ = w_->next; /* lets us add this watcher */
		2390
		2391	w->wd = -1;
		2392
		2393	if (fs_fd >= 0)
		2394	infy_add (EV_A_ w); /* re-add, no matter what */
		2395	else
		2396	ev_timer_start (EV_A_ &w->timer);
		2397	}
		2398
		2399	}
		2400	}
		2401
		2402	#endif
		2403
		2404	void
		2405	ev_stat_stat (EV_P_ ev_stat *w)
		2406	{
		2407	if (lstat (w->path, &w->attr) < 0)
		2408	w->attr.st_nlink = 0;
		2409	else if (!w->attr.st_nlink)
		2410	w->attr.st_nlink = 1;
		2411	}
		2412
		2413	static void noinline
		2414	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2415	{
		2416	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2417
		2418	/* we copy this here each the time so that */
		2419	/* prev has the old value when the callback gets invoked */
		2420	w->prev = w->attr;
		2421	ev_stat_stat (EV_A_ w);
		2422
		2423	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2424	if (
		2425	w->prev.st_dev != w->attr.st_dev
		2426	|| w->prev.st_ino != w->attr.st_ino
		2427	|| w->prev.st_mode != w->attr.st_mode
		2428	|| w->prev.st_nlink != w->attr.st_nlink
		2429	|| w->prev.st_uid != w->attr.st_uid
		2430	|| w->prev.st_gid != w->attr.st_gid
		2431	|| w->prev.st_rdev != w->attr.st_rdev
		2432	|| w->prev.st_size != w->attr.st_size
		2433	|| w->prev.st_atime != w->attr.st_atime
		2434	|| w->prev.st_mtime != w->attr.st_mtime
		2435	|| w->prev.st_ctime != w->attr.st_ctime
		2436	) {
		2437	#if EV_USE_INOTIFY
		2438	infy_del (EV_A_ w);
		2439	infy_add (EV_A_ w);
		2440	ev_stat_stat (EV_A_ w); /* avoid race... */
		2441	#endif
		2442
		2443	ev_feed_event (EV_A_ w, EV_STAT);
		2444	}
		2445	}
		2446
		2447	void
		2448	ev_stat_start (EV_P_ ev_stat *w)
		2449	{
		2450	if (expect_false (ev_is_active (w)))
		2451	return;
		2452
		2453	/* since we use memcmp, we need to clear any padding data etc. */
		2454	memset (&w->prev, 0, sizeof (ev_statdata));
		2455	memset (&w->attr, 0, sizeof (ev_statdata));
		2456
		2457	ev_stat_stat (EV_A_ w);
		2458
		2459	if (w->interval < MIN_STAT_INTERVAL)
		2460	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2461
		2462	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2463	ev_set_priority (&w->timer, ev_priority (w));
		2464
		2465	#if EV_USE_INOTIFY
		2466	infy_init (EV_A);
		2467
		2468	if (fs_fd >= 0)
		2469	infy_add (EV_A_ w);
		2470	else
		2471	#endif
		2472	ev_timer_start (EV_A_ &w->timer);
		2473
		2474	ev_start (EV_A_ (W)w, 1);
		2475	}
		2476
		2477	void
		2478	ev_stat_stop (EV_P_ ev_stat *w)
		2479	{
		2480	clear_pending (EV_A_ (W)w);
		2481	if (expect_false (!ev_is_active (w)))
		2482	return;
		2483
		2484	#if EV_USE_INOTIFY
		2485	infy_del (EV_A_ w);
		2486	#endif
		2487	ev_timer_stop (EV_A_ &w->timer);
		2488
		2489	ev_stop (EV_A_ (W)w);
		2490	}
		2491	#endif
		2492
		2493	#if EV_IDLE_ENABLE
		2494	void
		2495	ev_idle_start (EV_P_ ev_idle *w)
		2496	{
		2497	if (expect_false (ev_is_active (w)))
		2498	return;
		2499
		2500	pri_adjust (EV_A_ (W)w);
		2501
		2502	{
		2503	int active = ++idlecnt [ABSPRI (w)];
		2504
		2505	++idleall;
		2506	ev_start (EV_A_ (W)w, active);
		2507
		2508	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2509	idles [ABSPRI (w)][active - 1] = w;
		2510	}
		2511	}
		2512
		2513	void
		2514	ev_idle_stop (EV_P_ ev_idle *w)
		2515	{
		2516	clear_pending (EV_A_ (W)w);
		2517	if (expect_false (!ev_is_active (w)))
		2518	return;
		2519
		2520	{
		2521	int active = ev_active (w);
		2522
		2523	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2524	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2525
		2526	ev_stop (EV_A_ (W)w);
		2527	--idleall;
		2528	}
		2529	}
		2530	#endif
		2531
		2532	void
		2533	ev_prepare_start (EV_P_ ev_prepare *w)
		2534	{
		2535	if (expect_false (ev_is_active (w)))
		2536	return;
		2537
		2538	ev_start (EV_A_ (W)w, ++preparecnt);
		2539	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2540	prepares [preparecnt - 1] = w;
		2541	}
		2542
		2543	void
		2544	ev_prepare_stop (EV_P_ ev_prepare *w)
		2545	{
		2546	clear_pending (EV_A_ (W)w);
		2547	if (expect_false (!ev_is_active (w)))
		2548	return;
		2549
		2550	{
		2551	int active = ev_active (w);
		2552
		2553	prepares [active - 1] = prepares [--preparecnt];
		2554	ev_active (prepares [active - 1]) = active;
		2555	}
		2556
		2557	ev_stop (EV_A_ (W)w);
		2558	}
		2559
		2560	void
		2561	ev_check_start (EV_P_ ev_check *w)
		2562	{
		2563	if (expect_false (ev_is_active (w)))
		2564	return;
		2565
		2566	ev_start (EV_A_ (W)w, ++checkcnt);
		2567	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2568	checks [checkcnt - 1] = w;
		2569	}
		2570
		2571	void
		2572	ev_check_stop (EV_P_ ev_check *w)
		2573	{
		2574	clear_pending (EV_A_ (W)w);
		2575	if (expect_false (!ev_is_active (w)))
		2576	return;
		2577
		2578	{
		2579	int active = ev_active (w);
		2580
		2581	checks [active - 1] = checks [--checkcnt];
		2582	ev_active (checks [active - 1]) = active;
		2583	}
		2584
		2585	ev_stop (EV_A_ (W)w);
		2586	}
		2587
		2588	#if EV_EMBED_ENABLE
		2589	void noinline
		2590	ev_embed_sweep (EV_P_ ev_embed *w)
		2591	{
		2592	ev_loop (w->other, EVLOOP_NONBLOCK);
		2593	}
		2594
		2595	static void
		2596	embed_io_cb (EV_P_ ev_io *io, int revents)
		2597	{
		2598	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2599
		2600	if (ev_cb (w))
		2601	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2602	else
		2603	ev_loop (w->other, EVLOOP_NONBLOCK);
		2604	}
		2605
		2606	static void
		2607	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2608	{
		2609	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2610
		2611	{
		2612	struct ev_loop *loop = w->other;
		2613
		2614	while (fdchangecnt)
		2615	{
		2616	fd_reify (EV_A);
		2617	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2618	}
		2619	}
		2620	}
		2621
		2622	#if 0
		2623	static void
		2624	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2625	{
		2626	ev_idle_stop (EV_A_ idle);
		2627	}
		2628	#endif
		2629
		2630	void
		2631	ev_embed_start (EV_P_ ev_embed *w)
		2632	{
		2633	if (expect_false (ev_is_active (w)))
		2634	return;
		2635
		2636	{
		2637	struct ev_loop *loop = w->other;
		2638	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2639	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2640	}
		2641
		2642	ev_set_priority (&w->io, ev_priority (w));
		2643	ev_io_start (EV_A_ &w->io);
		2644
		2645	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2646	ev_set_priority (&w->prepare, EV_MINPRI);
		2647	ev_prepare_start (EV_A_ &w->prepare);
		2648
		2649	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2650
		2651	ev_start (EV_A_ (W)w, 1);
		2652	}
		2653
		2654	void
		2655	ev_embed_stop (EV_P_ ev_embed *w)
		2656	{
		2657	clear_pending (EV_A_ (W)w);
		2658	if (expect_false (!ev_is_active (w)))
		2659	return;
		2660
		2661	ev_io_stop (EV_A_ &w->io);
		2662	ev_prepare_stop (EV_A_ &w->prepare);
		2663
		2664	ev_stop (EV_A_ (W)w);
		2665	}
		2666	#endif
		2667
		2668	#if EV_FORK_ENABLE
		2669	void
		2670	ev_fork_start (EV_P_ ev_fork *w)
		2671	{
		2672	if (expect_false (ev_is_active (w)))
		2673	return;
		2674
		2675	ev_start (EV_A_ (W)w, ++forkcnt);
		2676	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2677	forks [forkcnt - 1] = w;
		2678	}
		2679
		2680	void
		2681	ev_fork_stop (EV_P_ ev_fork *w)
		2682	{
		2683	clear_pending (EV_A_ (W)w);
		2684	if (expect_false (!ev_is_active (w)))
		2685	return;
		2686
		2687	{
		2688	int active = ev_active (w);
		2689
		2690	forks [active - 1] = forks [--forkcnt];
		2691	ev_active (forks [active - 1]) = active;
		2692	}
		2693
		2694	ev_stop (EV_A_ (W)w);
		2695	}
		2696	#endif
		2697
		2698	#if EV_ASYNC_ENABLE
		2699	void
		2700	ev_async_start (EV_P_ ev_async *w)
		2701	{
		2702	if (expect_false (ev_is_active (w)))
		2703	return;
		2704
		2705	evpipe_init (EV_A);
		2706
		2707	ev_start (EV_A_ (W)w, ++asynccnt);
		2708	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2709	asyncs [asynccnt - 1] = w;
		2710	}
		2711
		2712	void
		2713	ev_async_stop (EV_P_ ev_async *w)
		2714	{
		2715	clear_pending (EV_A_ (W)w);
		2716	if (expect_false (!ev_is_active (w)))
		2717	return;
		2718
		2719	{
		2720	int active = ev_active (w);
		2721
		2722	asyncs [active - 1] = asyncs [--asynccnt];
		2723	ev_active (asyncs [active - 1]) = active;
		2724	}
		2725
		2726	ev_stop (EV_A_ (W)w);
		2727	}
		2728
		2729	void
		2730	ev_async_send (EV_P_ ev_async *w)
		2731	{
		2732	w->sent = 1;
		2733	evpipe_write (EV_A_ &gotasync);
		2734	}
		2735	#endif
		2736
1604	/*****************************************************************************/	2737	/*****************************************************************************/
1605		2738
1606	struct ev_once	2739	struct ev_once
1607	{	2740	{
1608	struct ev_io io;	2741	ev_io io;
1609	struct ev_timer to;	2742	ev_timer to;
1610	void (*cb)(int revents, void *arg);	2743	void (*cb)(int revents, void *arg);
1611	void *arg;	2744	void *arg;
1612	};	2745	};
1613		2746
1614	static void	2747	static void
…		…
1623		2756
1624	cb (revents, arg);	2757	cb (revents, arg);
1625	}	2758	}
1626		2759
1627	static void	2760	static void
1628	once_cb_io (EV_P_ struct ev_io *w, int revents)	2761	once_cb_io (EV_P_ ev_io *w, int revents)
1629	{	2762	{
1630	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2763	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1631	}	2764	}
1632		2765
1633	static void	2766	static void
1634	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2767	once_cb_to (EV_P_ ev_timer *w, int revents)
1635	{	2768	{
1636	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2769	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1637	}	2770	}
1638		2771
1639	void	2772	void
…		…
1663	ev_timer_set (&once->to, timeout, 0.);	2796	ev_timer_set (&once->to, timeout, 0.);
1664	ev_timer_start (EV_A_ &once->to);	2797	ev_timer_start (EV_A_ &once->to);
1665	}	2798	}
1666	}	2799	}
1667		2800
		2801	#if EV_MULTIPLICITY
		2802	#include "ev_wrap.h"
		2803	#endif
		2804
1668	#ifdef __cplusplus	2805	#ifdef __cplusplus
1669	}	2806	}
1670	#endif	2807	#endif
1671		2808

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