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Comparing libev/ev.c (file contents):
Revision 1.126 by root, Sun Nov 18 01:25:23 2007 UTC vs.
Revision 1.246 by root, Wed May 21 12:51:38 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
37	# include "config.h"	49	# include "config.h"
		50	# endif
38		51
39	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
40	# ifndef EV_USE_MONOTONIC	53	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
42	# endif	55	# endif
…		…
50	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
51	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
52	# endif	65	# endif
53	# endif	66	# endif
54		67
55	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
56	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
57	# else	71	# else
58	# define EV_USE_SELECT 0	72	# define EV_USE_NANOSLEEP 0
		73	# endif
59	# endif	74	# endif
60		75
61	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
62	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
63	# else	79	# else
64	# define EV_USE_POLL 0	80	# define EV_USE_SELECT 0
		81	# endif
65	# endif	82	# endif
66		83
67	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
68	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
69	# else	87	# else
70	# define EV_USE_EPOLL 0	88	# define EV_USE_POLL 0
		89	# endif
71	# endif	90	# endif
72		91
73	# 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
74	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
75	# else	95	# else
76	# define EV_USE_KQUEUE 0	96	# define EV_USE_EPOLL 0
		97	# endif
77	# endif	98	# endif
78		99
79	# 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
80	# define EV_USE_PORT 1	102	# define EV_USE_KQUEUE 1
81	# else	103	# else
82	# define EV_USE_PORT 0	104	# define EV_USE_KQUEUE 0
		105	# endif
83	# 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
84		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
85	#endif	132	#endif
86		133
87	#include <math.h>	134	#include <math.h>
88	#include <stdlib.h>	135	#include <stdlib.h>
89	#include <fcntl.h>	136	#include <fcntl.h>
…		…
96	#include <sys/types.h>	143	#include <sys/types.h>
97	#include <time.h>	144	#include <time.h>
98		145
99	#include <signal.h>	146	#include <signal.h>
100		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
101	#ifndef _WIN32	154	#ifndef _WIN32
102	# include <unistd.h>
103	# include <sys/time.h>	155	# include <sys/time.h>
104	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
105	#else	158	#else
106	# define WIN32_LEAN_AND_MEAN	159	# define WIN32_LEAN_AND_MEAN
107	# include <windows.h>	160	# include <windows.h>
108	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
109	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
110	# endif	163	# endif
111	#endif	164	#endif
112		165
113	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
114		167
115	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
116	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
117	#endif	170	#endif
118		171
119	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
120	# 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
121	#endif	178	#endif
122		179
123	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
124	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
125	#endif	182	#endif
…		…
131	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
132	# endif	189	# endif
133	#endif	190	#endif
134		191
135	#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
136	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
137	#endif	198	#endif
138		199
139	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
140	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
141	#endif	202	#endif
142		203
143	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
144	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
145	#endif	206	#endif
146		207
147	/**/	208	#ifndef EV_USE_INOTIFY
148		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
149	/* darwin simply cannot be helped */	210	# define EV_USE_INOTIFY 1
150	#ifdef __APPLE__	211	# else
151	# undef EV_USE_POLL	212	# define EV_USE_INOTIFY 0
152	# undef EV_USE_KQUEUE
153	#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 */
154		249
155	#ifndef CLOCK_MONOTONIC	250	#ifndef CLOCK_MONOTONIC
156	# undef EV_USE_MONOTONIC	251	# undef EV_USE_MONOTONIC
157	# define EV_USE_MONOTONIC 0	252	# define EV_USE_MONOTONIC 0
158	#endif	253	#endif
…		…
160	#ifndef CLOCK_REALTIME	255	#ifndef CLOCK_REALTIME
161	# undef EV_USE_REALTIME	256	# undef EV_USE_REALTIME
162	# define EV_USE_REALTIME 0	257	# define EV_USE_REALTIME 0
163	#endif	258	#endif
164		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
165	#if EV_SELECT_IS_WINSOCKET	275	#if EV_SELECT_IS_WINSOCKET
166	# include <winsock.h>	276	# include <winsock.h>
167	#endif	277	#endif
168		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
169	/**/	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 */
170		302
171	#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) */
172	#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) */
173	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
174	/*#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 */
175		306
176	#ifdef EV_H
177	# include EV_H
178	#else
179	# include "ev.h"
180	#endif
181
182	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
183	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
184	# define inline static inline	309	# define noinline __attribute__ ((noinline))
185	#else	310	#else
186	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
187	# define inline static	312	# define noinline
		313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		314	# define inline
		315	# endif
188	#endif	316	#endif
189		317
190	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
191	#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
192		327
193	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	328	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
194	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	329	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
195		330
196	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	331	#define EMPTY /* required for microsofts broken pseudo-c compiler */
197	#define EMPTY2(a,b) /* used to suppress some warnings */	332	#define EMPTY2(a,b) /* used to suppress some warnings */
198		333
199	typedef struct ev_watcher *W;	334	typedef ev_watcher *W;
200	typedef struct ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
201	typedef struct ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
202		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 */
203	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
204		346
205	#ifdef _WIN32	347	#ifdef _WIN32
206	# include "ev_win32.c"	348	# include "ev_win32.c"
207	#endif	349	#endif
208		350
209	/*****************************************************************************/	351	/*****************************************************************************/
210		352
211	static void (*syserr_cb)(const char *msg);	353	static void (*syserr_cb)(const char *msg);
212		354
		355	void
213	void ev_set_syserr_cb (void (*cb)(const char *msg))	356	ev_set_syserr_cb (void (*cb)(const char *msg))
214	{	357	{
215	syserr_cb = cb;	358	syserr_cb = cb;
216	}	359	}
217		360
218	static void	361	static void noinline
219	syserr (const char *msg)	362	syserr (const char *msg)
220	{	363	{
221	if (!msg)	364	if (!msg)
222	msg = "(libev) system error";	365	msg = "(libev) system error";
223		366
…		…
228	perror (msg);	371	perror (msg);
229	abort ();	372	abort ();
230	}	373	}
231	}	374	}
232		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
233	static void *(*alloc)(void *ptr, long size);	391	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
234		392
		393	void
235	void ev_set_allocator (void *(*cb)(void *ptr, long size))	394	ev_set_allocator (void *(*cb)(void *ptr, long size))
236	{	395	{
237	alloc = cb;	396	alloc = cb;
238	}	397	}
239		398
240	static void *	399	inline_speed void *
241	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
242	{	401	{
243	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
244		403
245	if (!ptr && size)	404	if (!ptr && size)
246	{	405	{
247	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
248	abort ();	407	abort ();
…		…
269	typedef struct	428	typedef struct
270	{	429	{
271	W w;	430	W w;
272	int events;	431	int events;
273	} 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
274		459
275	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
276		461
277	struct ev_loop	462	struct ev_loop
278	{	463	{
…		…
312	gettimeofday (&tv, 0);	497	gettimeofday (&tv, 0);
313	return tv.tv_sec + tv.tv_usec * 1e-6;	498	return tv.tv_sec + tv.tv_usec * 1e-6;
314	#endif	499	#endif
315	}	500	}
316		501
317	inline ev_tstamp	502	ev_tstamp inline_size
318	get_clock (void)	503	get_clock (void)
319	{	504	{
320	#if EV_USE_MONOTONIC	505	#if EV_USE_MONOTONIC
321	if (expect_true (have_monotonic))	506	if (expect_true (have_monotonic))
322	{	507	{
…		…
335	{	520	{
336	return ev_rt_now;	521	return ev_rt_now;
337	}	522	}
338	#endif	523	#endif
339		524
340	#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	}
341		581
342	#define array_needsize(type,base,cur,cnt,init) \	582	#define array_needsize(type,base,cur,cnt,init) \
343	if (expect_false ((cnt) > cur)) \	583	if (expect_false ((cnt) > (cur))) \
344	{ \	584	{ \
345	int newcnt = cur; \	585	int ocur_ = (cur); \
346	do \	586	(base) = (type *)array_realloc \
347	{ \	587	(sizeof (type), (base), &(cur), (cnt)); \
348	newcnt = array_roundsize (type, newcnt << 1); \	588	init ((base) + (ocur_), (cur) - ocur_); \
349	} \
350	while ((cnt) > newcnt); \
351	\
352	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
353	init (base + cur, newcnt - cur); \
354	cur = newcnt; \
355	}	589	}
356		590
		591	#if 0
357	#define array_slim(type,stem) \	592	#define array_slim(type,stem) \
358	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	593	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
359	{ \	594	{ \
360	stem ## max = array_roundsize (stem ## cnt >> 1); \	595	stem ## max = array_roundsize (stem ## cnt >> 1); \
361	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	596	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
362	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	597	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
363	}	598	}
		599	#endif
364		600
365	#define array_free(stem, idx) \	601	#define array_free(stem, idx) \
366	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;
367		603
368	/*****************************************************************************/	604	/*****************************************************************************/
369		605
370	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
371	anfds_init (ANFD *base, int count)	635	anfds_init (ANFD *base, int count)
372	{	636	{
373	while (count--)	637	while (count--)
374	{	638	{
375	base->head = 0;	639	base->head = 0;
…		…
378		642
379	++base;	643	++base;
380	}	644	}
381	}	645	}
382		646
383	void	647	void inline_speed
384	ev_feed_event (EV_P_ void *w, int revents)
385	{
386	W w_ = (W)w;
387
388	if (expect_false (w_->pending))
389	{
390	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
391	return;
392	}
393
394	w_->pending = ++pendingcnt [ABSPRI (w_)];
395	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
396	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
397	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
398	}
399
400	static void
401	queue_events (EV_P_ W *events, int eventcnt, int type)
402	{
403	int i;
404
405	for (i = 0; i < eventcnt; ++i)
406	ev_feed_event (EV_A_ events [i], type);
407	}
408
409	inline void
410	fd_event (EV_P_ int fd, int revents)	648	fd_event (EV_P_ int fd, int revents)
411	{	649	{
412	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
413	struct ev_io *w;	651	ev_io *w;
414		652
415	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)
416	{	654	{
417	int ev = w->events & revents;	655	int ev = w->events & revents;
418		656
419	if (ev)	657	if (ev)
420	ev_feed_event (EV_A_ (W)w, ev);	658	ev_feed_event (EV_A_ (W)w, ev);
…		…
422	}	660	}
423		661
424	void	662	void
425	ev_feed_fd_event (EV_P_ int fd, int revents)	663	ev_feed_fd_event (EV_P_ int fd, int revents)
426	{	664	{
		665	if (fd >= 0 && fd < anfdmax)
427	fd_event (EV_A_ fd, revents);	666	fd_event (EV_A_ fd, revents);
428	}	667	}
429		668
430	/*****************************************************************************/	669	void inline_size
431
432	inline void
433	fd_reify (EV_P)	670	fd_reify (EV_P)
434	{	671	{
435	int i;	672	int i;
436		673
437	for (i = 0; i < fdchangecnt; ++i)	674	for (i = 0; i < fdchangecnt; ++i)
438	{	675	{
439	int fd = fdchanges [i];	676	int fd = fdchanges [i];
440	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
441	struct ev_io *w;	678	ev_io *w;
442		679
443	int events = 0;	680	unsigned char events = 0;
444		681
445	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)
446	events |= w->events;	683	events |= (unsigned char)w->events;
447		684
448	#if EV_SELECT_IS_WINSOCKET	685	#if EV_SELECT_IS_WINSOCKET
449	if (events)	686	if (events)
450	{	687	{
451	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
452	anfd->handle = _get_osfhandle (fd);	692	anfd->handle = _get_osfhandle (fd);
		693	#endif
453	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));
454	}	695	}
455	#endif	696	#endif
456		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
457	anfd->reify = 0;	702	anfd->reify = 0;
458
459	method_modify (EV_A_ fd, anfd->events, events);
460	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	}
461	}	708	}
462		709
463	fdchangecnt = 0;	710	fdchangecnt = 0;
464	}	711	}
465		712
466	static void	713	void inline_size
467	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
468	{	715	{
469	if (expect_false (anfds [fd].reify))	716	unsigned char reify = anfds [fd].reify;
470	return;
471
472	anfds [fd].reify = 1;	717	anfds [fd].reify |= flags;
473		718
		719	if (expect_true (!reify))
		720	{
474	++fdchangecnt;	721	++fdchangecnt;
475	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
476	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
477	}	725	}
478		726
479	static void	727	void inline_speed
480	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
481	{	729	{
482	struct ev_io *w;	730	ev_io *w;
483		731
484	while ((w = (struct ev_io *)anfds [fd].head))	732	while ((w = (ev_io *)anfds [fd].head))
485	{	733	{
486	ev_io_stop (EV_A_ w);	734	ev_io_stop (EV_A_ w);
487	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);
488	}	736	}
489	}	737	}
490		738
491	inline int	739	int inline_size
492	fd_valid (int fd)	740	fd_valid (int fd)
493	{	741	{
494	#ifdef _WIN32	742	#ifdef _WIN32
495	return _get_osfhandle (fd) != -1;	743	return _get_osfhandle (fd) != -1;
496	#else	744	#else
497	return fcntl (fd, F_GETFD) != -1;	745	return fcntl (fd, F_GETFD) != -1;
498	#endif	746	#endif
499	}	747	}
500		748
501	/* called on EBADF to verify fds */	749	/* called on EBADF to verify fds */
502	static void	750	static void noinline
503	fd_ebadf (EV_P)	751	fd_ebadf (EV_P)
504	{	752	{
505	int fd;	753	int fd;
506		754
507	for (fd = 0; fd < anfdmax; ++fd)	755	for (fd = 0; fd < anfdmax; ++fd)
…		…
509	if (!fd_valid (fd) == -1 && errno == EBADF)	757	if (!fd_valid (fd) == -1 && errno == EBADF)
510	fd_kill (EV_A_ fd);	758	fd_kill (EV_A_ fd);
511	}	759	}
512		760
513	/* 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 */
514	static void	762	static void noinline
515	fd_enomem (EV_P)	763	fd_enomem (EV_P)
516	{	764	{
517	int fd;	765	int fd;
518		766
519	for (fd = anfdmax; fd--; )	767	for (fd = anfdmax; fd--; )
…		…
522	fd_kill (EV_A_ fd);	770	fd_kill (EV_A_ fd);
523	return;	771	return;
524	}	772	}
525	}	773	}
526		774
527	/* 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 */
528	static void	776	static void noinline
529	fd_rearm_all (EV_P)	777	fd_rearm_all (EV_P)
530	{	778	{
531	int fd;	779	int fd;
532		780
533	/* this should be highly optimised to not do anything but set a flag */
534	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
535	if (anfds [fd].events)	782	if (anfds [fd].events)
536	{	783	{
537	anfds [fd].events = 0;	784	anfds [fd].events = 0;
538	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET | 1);
539	}	786	}
540	}	787	}
541		788
542	/*****************************************************************************/	789	/*****************************************************************************/
543		790
544	static void	791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807
		808	/* towards the root */
		809	void inline_speed
545	upheap (WT *heap, int k)	810	upheap (ANHE *heap, int k)
546	{	811	{
547	WT w = heap [k];	812	ANHE he = heap [k];
548		813
549	while (k && heap [k >> 1]->at > w->at)	814	for (;;)
550	{
551	heap [k] = heap [k >> 1];
552	((W)heap [k])->active = k + 1;
553	k >>= 1;
554	}	815	{
		816	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
555		817
556	heap [k] = w;	818	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
557	((W)heap [k])->active = k + 1;
558
559	}
560
561	static void
562	downheap (WT *heap, int N, int k)
563	{
564	WT w = heap [k];
565
566	while (k < (N >> 1))
567	{
568	int j = k << 1;
569
570	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
571	++j;
572
573	if (w->at <= heap [j]->at)
574	break;	819	break;
575		820
576	heap [k] = heap [j];	821	heap [k] = heap [p];
577	((W)heap [k])->active = k + 1;	822	ev_active (ANHE_w (heap [k])) = k;
578	k = j;	823	k = p;
579	}	824	}
580		825
		826	ev_active (ANHE_w (he)) = k;
581	heap [k] = w;	827	heap [k] = he;
582	((W)heap [k])->active = k + 1;
583	}	828	}
584		829
585	inline void	830	/* away from the root */
		831	void inline_speed
		832	downheap (ANHE *heap, int N, int k)
		833	{
		834	ANHE he = heap [k];
		835	ANHE *E = heap + N + HEAP0;
		836
		837	for (;;)
		838	{
		839	ev_tstamp minat;
		840	ANHE *minpos;
		841	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		842
		843	// find minimum child
		844	if (expect_true (pos + DHEAP - 1 < E))
		845	{
		846	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else if (pos < E)
		852	{
		853	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		854	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		855	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		856	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		857	}
		858	else
		859	break;
		860
		861	if (ANHE_at (he) <= minat)
		862	break;
		863
		864	ev_active (ANHE_w (*minpos)) = k;
		865	heap [k] = *minpos;
		866
		867	k = minpos - heap;
		868	}
		869
		870	ev_active (ANHE_w (he)) = k;
		871	heap [k] = he;
		872	}
		873
		874	#else // 4HEAP
		875
		876	#define HEAP0 1
		877
		878	/* towards the root */
		879	void inline_speed
		880	upheap (ANHE *heap, int k)
		881	{
		882	ANHE he = heap [k];
		883
		884	for (;;)
		885	{
		886	int p = k >> 1;
		887
		888	/* maybe we could use a dummy element at heap [0]? */
		889	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		890	break;
		891
		892	heap [k] = heap [p];
		893	ev_active (ANHE_w (heap [k])) = k;
		894	k = p;
		895	}
		896
		897	heap [k] = he;
		898	ev_active (ANHE_w (heap [k])) = k;
		899	}
		900
		901	/* away from the root */
		902	void inline_speed
		903	downheap (ANHE *heap, int N, int k)
		904	{
		905	ANHE he = heap [k];
		906
		907	for (;;)
		908	{
		909	int c = k << 1;
		910
		911	if (c > N)
		912	break;
		913
		914	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		915	? 1 : 0;
		916
		917	if (ANHE_at (he) <= ANHE_at (heap [c]))
		918	break;
		919
		920	heap [k] = heap [c];
		921	ev_active (ANHE_w (heap [k])) = k;
		922
		923	k = c;
		924	}
		925
		926	heap [k] = he;
		927	ev_active (ANHE_w (he)) = k;
		928	}
		929	#endif
		930
		931	void inline_size
586	adjustheap (WT *heap, int N, int k)	932	adjustheap (ANHE *heap, int N, int k)
587	{	933	{
588	upheap (heap, k);	934	upheap (heap, k);
589	downheap (heap, N, k);	935	downheap (heap, N, k);
590	}	936	}
591		937
592	/*****************************************************************************/	938	/*****************************************************************************/
593		939
594	typedef struct	940	typedef struct
595	{	941	{
596	WL head;	942	WL head;
597	sig_atomic_t volatile gotsig;	943	EV_ATOMIC_T gotsig;
598	} ANSIG;	944	} ANSIG;
599		945
600	static ANSIG *signals;	946	static ANSIG *signals;
601	static int signalmax;	947	static int signalmax;
602		948
603	static int sigpipe [2];	949	static EV_ATOMIC_T gotsig;
604	static sig_atomic_t volatile gotsig;
605	static struct ev_io sigev;
606		950
607	static void	951	void inline_size
608	signals_init (ANSIG *base, int count)	952	signals_init (ANSIG *base, int count)
609	{	953	{
610	while (count--)	954	while (count--)
611	{	955	{
612	base->head = 0;	956	base->head = 0;
…		…
614		958
615	++base;	959	++base;
616	}	960	}
617	}	961	}
618		962
619	static void	963	/*****************************************************************************/
620	sighandler (int signum)
621	{
622	#if _WIN32
623	signal (signum, sighandler);
624	#endif
625		964
626	signals [signum - 1].gotsig = 1;	965	void inline_speed
627
628	if (!gotsig)
629	{
630	int old_errno = errno;
631	gotsig = 1;
632	write (sigpipe [1], &signum, 1);
633	errno = old_errno;
634	}
635	}
636
637	void
638	ev_feed_signal_event (EV_P_ int signum)
639	{
640	WL w;
641
642	#if EV_MULTIPLICITY
643	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
644	#endif
645
646	--signum;
647
648	if (signum < 0 || signum >= signalmax)
649	return;
650
651	signals [signum].gotsig = 0;
652
653	for (w = signals [signum].head; w; w = w->next)
654	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
655	}
656
657	static void
658	sigcb (EV_P_ struct ev_io *iow, int revents)
659	{
660	int signum;
661
662	read (sigpipe [0], &revents, 1);
663	gotsig = 0;
664
665	for (signum = signalmax; signum--; )
666	if (signals [signum].gotsig)
667	ev_feed_signal_event (EV_A_ signum + 1);
668	}
669
670	static void
671	fd_intern (int fd)	966	fd_intern (int fd)
672	{	967	{
673	#ifdef _WIN32	968	#ifdef _WIN32
674	int arg = 1;	969	int arg = 1;
675	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	970	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
677	fcntl (fd, F_SETFD, FD_CLOEXEC);	972	fcntl (fd, F_SETFD, FD_CLOEXEC);
678	fcntl (fd, F_SETFL, O_NONBLOCK);	973	fcntl (fd, F_SETFL, O_NONBLOCK);
679	#endif	974	#endif
680	}	975	}
681		976
		977	static void noinline
		978	evpipe_init (EV_P)
		979	{
		980	if (!ev_is_active (&pipeev))
		981	{
		982	#if EV_USE_EVENTFD
		983	if ((evfd = eventfd (0, 0)) >= 0)
		984	{
		985	evpipe [0] = -1;
		986	fd_intern (evfd);
		987	ev_io_set (&pipeev, evfd, EV_READ);
		988	}
		989	else
		990	#endif
		991	{
		992	while (pipe (evpipe))
		993	syserr ("(libev) error creating signal/async pipe");
		994
		995	fd_intern (evpipe [0]);
		996	fd_intern (evpipe [1]);
		997	ev_io_set (&pipeev, evpipe [0], EV_READ);
		998	}
		999
		1000	ev_io_start (EV_A_ &pipeev);
		1001	ev_unref (EV_A); /* watcher should not keep loop alive */
		1002	}
		1003	}
		1004
		1005	void inline_size
		1006	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1007	{
		1008	if (!*flag)
		1009	{
		1010	int old_errno = errno; /* save errno because write might clobber it */
		1011
		1012	*flag = 1;
		1013
		1014	#if EV_USE_EVENTFD
		1015	if (evfd >= 0)
		1016	{
		1017	uint64_t counter = 1;
		1018	write (evfd, &counter, sizeof (uint64_t));
		1019	}
		1020	else
		1021	#endif
		1022	write (evpipe [1], &old_errno, 1);
		1023
		1024	errno = old_errno;
		1025	}
		1026	}
		1027
682	static void	1028	static void
683	siginit (EV_P)	1029	pipecb (EV_P_ ev_io *iow, int revents)
684	{	1030	{
685	fd_intern (sigpipe [0]);	1031	#if EV_USE_EVENTFD
686	fd_intern (sigpipe [1]);	1032	if (evfd >= 0)
		1033	{
		1034	uint64_t counter;
		1035	read (evfd, &counter, sizeof (uint64_t));
		1036	}
		1037	else
		1038	#endif
		1039	{
		1040	char dummy;
		1041	read (evpipe [0], &dummy, 1);
		1042	}
687		1043
688	ev_io_set (&sigev, sigpipe [0], EV_READ);	1044	if (gotsig && ev_is_default_loop (EV_A))
689	ev_io_start (EV_A_ &sigev);	1045	{
690	ev_unref (EV_A); /* child watcher should not keep loop alive */	1046	int signum;
		1047	gotsig = 0;
		1048
		1049	for (signum = signalmax; signum--; )
		1050	if (signals [signum].gotsig)
		1051	ev_feed_signal_event (EV_A_ signum + 1);
		1052	}
		1053
		1054	#if EV_ASYNC_ENABLE
		1055	if (gotasync)
		1056	{
		1057	int i;
		1058	gotasync = 0;
		1059
		1060	for (i = asynccnt; i--; )
		1061	if (asyncs [i]->sent)
		1062	{
		1063	asyncs [i]->sent = 0;
		1064	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1065	}
		1066	}
		1067	#endif
691	}	1068	}
692		1069
693	/*****************************************************************************/	1070	/*****************************************************************************/
694		1071
695	static struct ev_child *childs [PID_HASHSIZE];	1072	static void
		1073	ev_sighandler (int signum)
		1074	{
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *loop = &default_loop_struct;
		1077	#endif
		1078
		1079	#if _WIN32
		1080	signal (signum, ev_sighandler);
		1081	#endif
		1082
		1083	signals [signum - 1].gotsig = 1;
		1084	evpipe_write (EV_A_ &gotsig);
		1085	}
		1086
		1087	void noinline
		1088	ev_feed_signal_event (EV_P_ int signum)
		1089	{
		1090	WL w;
		1091
		1092	#if EV_MULTIPLICITY
		1093	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1094	#endif
		1095
		1096	--signum;
		1097
		1098	if (signum < 0 || signum >= signalmax)
		1099	return;
		1100
		1101	signals [signum].gotsig = 0;
		1102
		1103	for (w = signals [signum].head; w; w = w->next)
		1104	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1105	}
		1106
		1107	/*****************************************************************************/
		1108
		1109	static WL childs [EV_PID_HASHSIZE];
696		1110
697	#ifndef _WIN32	1111	#ifndef _WIN32
698		1112
699	static struct ev_signal childev;	1113	static ev_signal childev;
		1114
		1115	#ifndef WIFCONTINUED
		1116	# define WIFCONTINUED(status) 0
		1117	#endif
		1118
		1119	void inline_speed
		1120	child_reap (EV_P_ int chain, int pid, int status)
		1121	{
		1122	ev_child *w;
		1123	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1124
		1125	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1126	{
		1127	if ((w->pid == pid || !w->pid)
		1128	&& (!traced || (w->flags & 1)))
		1129	{
		1130	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1131	w->rpid = pid;
		1132	w->rstatus = status;
		1133	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1134	}
		1135	}
		1136	}
700		1137
701	#ifndef WCONTINUED	1138	#ifndef WCONTINUED
702	# define WCONTINUED 0	1139	# define WCONTINUED 0
703	#endif	1140	#endif
704		1141
705	static void	1142	static void
706	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
707	{
708	struct ev_child *w;
709
710	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
711	if (w->pid == pid || !w->pid)
712	{
713	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
714	w->rpid = pid;
715	w->rstatus = status;
716	ev_feed_event (EV_A_ (W)w, EV_CHILD);
717	}
718	}
719
720	static void
721	childcb (EV_P_ struct ev_signal *sw, int revents)	1143	childcb (EV_P_ ev_signal *sw, int revents)
722	{	1144	{
723	int pid, status;	1145	int pid, status;
724		1146
		1147	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
725	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1148	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
726	{	1149	if (!WCONTINUED
		1150	|| errno != EINVAL
		1151	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1152	return;
		1153
727	/* make sure we are called again until all childs have been reaped */	1154	/* make sure we are called again until all children have been reaped */
		1155	/* we need to do it this way so that the callback gets called before we continue */
728	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1156	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
729		1157
730	child_reap (EV_A_ sw, pid, pid, status);	1158	child_reap (EV_A_ pid, pid, status);
		1159	if (EV_PID_HASHSIZE > 1)
731	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1160	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
732	}
733	}	1161	}
734		1162
735	#endif	1163	#endif
736		1164
737	/*****************************************************************************/	1165	/*****************************************************************************/
…		…
763	{	1191	{
764	return EV_VERSION_MINOR;	1192	return EV_VERSION_MINOR;
765	}	1193	}
766		1194
767	/* return true if we are running with elevated privileges and should ignore env variables */	1195	/* return true if we are running with elevated privileges and should ignore env variables */
768	static int	1196	int inline_size
769	enable_secure (void)	1197	enable_secure (void)
770	{	1198	{
771	#ifdef _WIN32	1199	#ifdef _WIN32
772	return 0;	1200	return 0;
773	#else	1201	#else
…		…
775	|| getgid () != getegid ();	1203	|| getgid () != getegid ();
776	#endif	1204	#endif
777	}	1205	}
778		1206
779	unsigned int	1207	unsigned int
780	ev_method (EV_P)	1208	ev_supported_backends (void)
781	{	1209	{
782	return method;	1210	unsigned int flags = 0;
783	}
784		1211
785	static void	1212	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1213	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1214	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1215	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1216	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1217
		1218	return flags;
		1219	}
		1220
		1221	unsigned int
		1222	ev_recommended_backends (void)
		1223	{
		1224	unsigned int flags = ev_supported_backends ();
		1225
		1226	#ifndef __NetBSD__
		1227	/* kqueue is borked on everything but netbsd apparently */
		1228	/* it usually doesn't work correctly on anything but sockets and pipes */
		1229	flags &= ~EVBACKEND_KQUEUE;
		1230	#endif
		1231	#ifdef __APPLE__
		1232	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1233	flags &= ~EVBACKEND_POLL;
		1234	#endif
		1235
		1236	return flags;
		1237	}
		1238
		1239	unsigned int
		1240	ev_embeddable_backends (void)
		1241	{
		1242	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1243
		1244	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1245	/* please fix it and tell me how to detect the fix */
		1246	flags &= ~EVBACKEND_EPOLL;
		1247
		1248	return flags;
		1249	}
		1250
		1251	unsigned int
		1252	ev_backend (EV_P)
		1253	{
		1254	return backend;
		1255	}
		1256
		1257	unsigned int
		1258	ev_loop_count (EV_P)
		1259	{
		1260	return loop_count;
		1261	}
		1262
		1263	void
		1264	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	io_blocktime = interval;
		1267	}
		1268
		1269	void
		1270	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1271	{
		1272	timeout_blocktime = interval;
		1273	}
		1274
		1275	static void noinline
786	loop_init (EV_P_ unsigned int flags)	1276	loop_init (EV_P_ unsigned int flags)
787	{	1277	{
788	if (!method)	1278	if (!backend)
789	{	1279	{
790	#if EV_USE_MONOTONIC	1280	#if EV_USE_MONOTONIC
791	{	1281	{
792	struct timespec ts;	1282	struct timespec ts;
793	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1283	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
794	have_monotonic = 1;	1284	have_monotonic = 1;
795	}	1285	}
796	#endif	1286	#endif
797		1287
798	ev_rt_now = ev_time ();	1288	ev_rt_now = ev_time ();
799	mn_now = get_clock ();	1289	mn_now = get_clock ();
800	now_floor = mn_now;	1290	now_floor = mn_now;
801	rtmn_diff = ev_rt_now - mn_now;	1291	rtmn_diff = ev_rt_now - mn_now;
802		1292
803	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))	1293	io_blocktime = 0.;
		1294	timeout_blocktime = 0.;
		1295	backend = 0;
		1296	backend_fd = -1;
		1297	gotasync = 0;
		1298	#if EV_USE_INOTIFY
		1299	fs_fd = -2;
		1300	#endif
		1301
		1302	/* pid check not overridable via env */
		1303	#ifndef _WIN32
		1304	if (flags & EVFLAG_FORKCHECK)
		1305	curpid = getpid ();
		1306	#endif
		1307
		1308	if (!(flags & EVFLAG_NOENV)
		1309	&& !enable_secure ()
		1310	&& getenv ("LIBEV_FLAGS"))
804	flags = atoi (getenv ("LIBEV_FLAGS"));	1311	flags = atoi (getenv ("LIBEV_FLAGS"));
805		1312
806	if (!(flags & 0x0000ffff))	1313	if (!(flags & 0x0000ffffU))
807	flags |= 0x0000ffff;	1314	flags |= ev_recommended_backends ();
808		1315
809	method = 0;
810	#if EV_USE_PORT	1316	#if EV_USE_PORT
811	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);	1317	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
812	#endif	1318	#endif
813	#if EV_USE_KQUEUE	1319	#if EV_USE_KQUEUE
814	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);	1320	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
815	#endif	1321	#endif
816	#if EV_USE_EPOLL	1322	#if EV_USE_EPOLL
817	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);	1323	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
818	#endif	1324	#endif
819	#if EV_USE_POLL	1325	#if EV_USE_POLL
820	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);	1326	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
821	#endif	1327	#endif
822	#if EV_USE_SELECT	1328	#if EV_USE_SELECT
823	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);	1329	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
824	#endif	1330	#endif
825		1331
826	ev_init (&sigev, sigcb);	1332	ev_init (&pipeev, pipecb);
827	ev_set_priority (&sigev, EV_MAXPRI);	1333	ev_set_priority (&pipeev, EV_MAXPRI);
828	}	1334	}
829	}	1335	}
830		1336
831	static void	1337	static void noinline
832	loop_destroy (EV_P)	1338	loop_destroy (EV_P)
833	{	1339	{
834	int i;	1340	int i;
835		1341
		1342	if (ev_is_active (&pipeev))
		1343	{
		1344	ev_ref (EV_A); /* signal watcher */
		1345	ev_io_stop (EV_A_ &pipeev);
		1346
		1347	#if EV_USE_EVENTFD
		1348	if (evfd >= 0)
		1349	close (evfd);
		1350	#endif
		1351
		1352	if (evpipe [0] >= 0)
		1353	{
		1354	close (evpipe [0]);
		1355	close (evpipe [1]);
		1356	}
		1357	}
		1358
		1359	#if EV_USE_INOTIFY
		1360	if (fs_fd >= 0)
		1361	close (fs_fd);
		1362	#endif
		1363
		1364	if (backend_fd >= 0)
		1365	close (backend_fd);
		1366
836	#if EV_USE_PORT	1367	#if EV_USE_PORT
837	if (method == EVMETHOD_PORT ) port_destroy (EV_A);	1368	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
838	#endif	1369	#endif
839	#if EV_USE_KQUEUE	1370	#if EV_USE_KQUEUE
840	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1371	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
841	#endif	1372	#endif
842	#if EV_USE_EPOLL	1373	#if EV_USE_EPOLL
843	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1374	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
844	#endif	1375	#endif
845	#if EV_USE_POLL	1376	#if EV_USE_POLL
846	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1377	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
847	#endif	1378	#endif
848	#if EV_USE_SELECT	1379	#if EV_USE_SELECT
849	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1380	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
850	#endif	1381	#endif
851		1382
852	for (i = NUMPRI; i--; )	1383	for (i = NUMPRI; i--; )
		1384	{
853	array_free (pending, [i]);	1385	array_free (pending, [i]);
		1386	#if EV_IDLE_ENABLE
		1387	array_free (idle, [i]);
		1388	#endif
		1389	}
		1390
		1391	ev_free (anfds); anfdmax = 0;
854		1392
855	/* have to use the microsoft-never-gets-it-right macro */	1393	/* have to use the microsoft-never-gets-it-right macro */
856	array_free (fdchange, EMPTY0);	1394	array_free (fdchange, EMPTY);
857	array_free (timer, EMPTY0);	1395	array_free (timer, EMPTY);
858	#if EV_PERIODICS	1396	#if EV_PERIODIC_ENABLE
859	array_free (periodic, EMPTY0);	1397	array_free (periodic, EMPTY);
860	#endif	1398	#endif
		1399	#if EV_FORK_ENABLE
861	array_free (idle, EMPTY0);	1400	array_free (fork, EMPTY);
		1401	#endif
862	array_free (prepare, EMPTY0);	1402	array_free (prepare, EMPTY);
863	array_free (check, EMPTY0);	1403	array_free (check, EMPTY);
		1404	#if EV_ASYNC_ENABLE
		1405	array_free (async, EMPTY);
		1406	#endif
864		1407
865	method = 0;	1408	backend = 0;
866	}	1409	}
867		1410
868	static void	1411	#if EV_USE_INOTIFY
		1412	void inline_size infy_fork (EV_P);
		1413	#endif
		1414
		1415	void inline_size
869	loop_fork (EV_P)	1416	loop_fork (EV_P)
870	{	1417	{
871	#if EV_USE_PORT	1418	#if EV_USE_PORT
872	if (method == EVMETHOD_PORT ) port_fork (EV_A);	1419	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
873	#endif	1420	#endif
874	#if EV_USE_KQUEUE	1421	#if EV_USE_KQUEUE
875	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1422	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
876	#endif	1423	#endif
877	#if EV_USE_EPOLL	1424	#if EV_USE_EPOLL
878	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1425	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
879	#endif	1426	#endif
		1427	#if EV_USE_INOTIFY
		1428	infy_fork (EV_A);
		1429	#endif
880		1430
881	if (ev_is_active (&sigev))	1431	if (ev_is_active (&pipeev))
882	{	1432	{
883	/* default loop */	1433	/* this "locks" the handlers against writing to the pipe */
		1434	/* while we modify the fd vars */
		1435	gotsig = 1;
		1436	#if EV_ASYNC_ENABLE
		1437	gotasync = 1;
		1438	#endif
884		1439
885	ev_ref (EV_A);	1440	ev_ref (EV_A);
886	ev_io_stop (EV_A_ &sigev);	1441	ev_io_stop (EV_A_ &pipeev);
		1442
		1443	#if EV_USE_EVENTFD
		1444	if (evfd >= 0)
		1445	close (evfd);
		1446	#endif
		1447
		1448	if (evpipe [0] >= 0)
		1449	{
887	close (sigpipe [0]);	1450	close (evpipe [0]);
888	close (sigpipe [1]);	1451	close (evpipe [1]);
		1452	}
889		1453
890	while (pipe (sigpipe))
891	syserr ("(libev) error creating pipe");
892
893	siginit (EV_A);	1454	evpipe_init (EV_A);
		1455	/* now iterate over everything, in case we missed something */
		1456	pipecb (EV_A_ &pipeev, EV_READ);
894	}	1457	}
895		1458
896	postfork = 0;	1459	postfork = 0;
897	}	1460	}
898		1461
…		…
904		1467
905	memset (loop, 0, sizeof (struct ev_loop));	1468	memset (loop, 0, sizeof (struct ev_loop));
906		1469
907	loop_init (EV_A_ flags);	1470	loop_init (EV_A_ flags);
908		1471
909	if (ev_method (EV_A))	1472	if (ev_backend (EV_A))
910	return loop;	1473	return loop;
911		1474
912	return 0;	1475	return 0;
913	}	1476	}
914		1477
…		…
920	}	1483	}
921		1484
922	void	1485	void
923	ev_loop_fork (EV_P)	1486	ev_loop_fork (EV_P)
924	{	1487	{
925	postfork = 1;	1488	postfork = 1; /* must be in line with ev_default_fork */
926	}	1489	}
927
928	#endif	1490	#endif
929		1491
930	#if EV_MULTIPLICITY	1492	#if EV_MULTIPLICITY
931	struct ev_loop *	1493	struct ev_loop *
932	ev_default_loop_init (unsigned int flags)	1494	ev_default_loop_init (unsigned int flags)
933	#else	1495	#else
934	int	1496	int
935	ev_default_loop (unsigned int flags)	1497	ev_default_loop (unsigned int flags)
936	#endif	1498	#endif
937	{	1499	{
938	if (sigpipe [0] == sigpipe [1])
939	if (pipe (sigpipe))
940	return 0;
941
942	if (!ev_default_loop_ptr)	1500	if (!ev_default_loop_ptr)
943	{	1501	{
944	#if EV_MULTIPLICITY	1502	#if EV_MULTIPLICITY
945	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1503	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
946	#else	1504	#else
947	ev_default_loop_ptr = 1;	1505	ev_default_loop_ptr = 1;
948	#endif	1506	#endif
949		1507
950	loop_init (EV_A_ flags);	1508	loop_init (EV_A_ flags);
951		1509
952	if (ev_method (EV_A))	1510	if (ev_backend (EV_A))
953	{	1511	{
954	siginit (EV_A);
955
956	#ifndef _WIN32	1512	#ifndef _WIN32
957	ev_signal_init (&childev, childcb, SIGCHLD);	1513	ev_signal_init (&childev, childcb, SIGCHLD);
958	ev_set_priority (&childev, EV_MAXPRI);	1514	ev_set_priority (&childev, EV_MAXPRI);
959	ev_signal_start (EV_A_ &childev);	1515	ev_signal_start (EV_A_ &childev);
960	ev_unref (EV_A); /* child watcher should not keep loop alive */	1516	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
977	#ifndef _WIN32	1533	#ifndef _WIN32
978	ev_ref (EV_A); /* child watcher */	1534	ev_ref (EV_A); /* child watcher */
979	ev_signal_stop (EV_A_ &childev);	1535	ev_signal_stop (EV_A_ &childev);
980	#endif	1536	#endif
981		1537
982	ev_ref (EV_A); /* signal watcher */
983	ev_io_stop (EV_A_ &sigev);
984
985	close (sigpipe [0]); sigpipe [0] = 0;
986	close (sigpipe [1]); sigpipe [1] = 0;
987
988	loop_destroy (EV_A);	1538	loop_destroy (EV_A);
989	}	1539	}
990		1540
991	void	1541	void
992	ev_default_fork (void)	1542	ev_default_fork (void)
993	{	1543	{
994	#if EV_MULTIPLICITY	1544	#if EV_MULTIPLICITY
995	struct ev_loop *loop = ev_default_loop_ptr;	1545	struct ev_loop *loop = ev_default_loop_ptr;
996	#endif	1546	#endif
997		1547
998	if (method)	1548	if (backend)
999	postfork = 1;	1549	postfork = 1; /* must be in line with ev_loop_fork */
1000	}	1550	}
1001		1551
1002	/*****************************************************************************/	1552	/*****************************************************************************/
1003		1553
1004	static int	1554	void
1005	any_pending (EV_P)	1555	ev_invoke (EV_P_ void *w, int revents)
1006	{	1556	{
1007	int pri;	1557	EV_CB_INVOKE ((W)w, revents);
1008
1009	for (pri = NUMPRI; pri--; )
1010	if (pendingcnt [pri])
1011	return 1;
1012
1013	return 0;
1014	}	1558	}
1015		1559
1016	inline void	1560	void inline_speed
1017	call_pending (EV_P)	1561	call_pending (EV_P)
1018	{	1562	{
1019	int pri;	1563	int pri;
1020		1564
1021	for (pri = NUMPRI; pri--; )	1565	for (pri = NUMPRI; pri--; )
…		…
1023	{	1567	{
1024	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1568	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1025		1569
1026	if (expect_true (p->w))	1570	if (expect_true (p->w))
1027	{	1571	{
		1572	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1573
1028	p->w->pending = 0;	1574	p->w->pending = 0;
1029	EV_CB_INVOKE (p->w, p->events);	1575	EV_CB_INVOKE (p->w, p->events);
1030	}	1576	}
1031	}	1577	}
1032	}	1578	}
1033		1579
1034	inline void	1580	#if EV_IDLE_ENABLE
		1581	void inline_size
		1582	idle_reify (EV_P)
		1583	{
		1584	if (expect_false (idleall))
		1585	{
		1586	int pri;
		1587
		1588	for (pri = NUMPRI; pri--; )
		1589	{
		1590	if (pendingcnt [pri])
		1591	break;
		1592
		1593	if (idlecnt [pri])
		1594	{
		1595	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1596	break;
		1597	}
		1598	}
		1599	}
		1600	}
		1601	#endif
		1602
		1603	void inline_size
1035	timers_reify (EV_P)	1604	timers_reify (EV_P)
1036	{	1605	{
1037	while (timercnt && ((WT)timers [0])->at <= mn_now)	1606	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1038	{	1607	{
1039	struct ev_timer *w = timers [0];	1608	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1040		1609
1041	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1610	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1042		1611
1043	/* first reschedule or stop timer */	1612	/* first reschedule or stop timer */
1044	if (w->repeat)	1613	if (w->repeat)
1045	{	1614	{
		1615	ev_at (w) += w->repeat;
		1616	if (ev_at (w) < mn_now)
		1617	ev_at (w) = mn_now;
		1618
1046	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1619	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1047		1620
1048	((WT)w)->at += w->repeat;	1621	ANHE_at_set (timers [HEAP0]);
1049	if (((WT)w)->at < mn_now)
1050	((WT)w)->at = mn_now;
1051
1052	downheap ((WT *)timers, timercnt, 0);	1622	downheap (timers, timercnt, HEAP0);
1053	}	1623	}
1054	else	1624	else
1055	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1625	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1056		1626
1057	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1627	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1058	}	1628	}
1059	}	1629	}
1060		1630
1061	#if EV_PERIODICS	1631	#if EV_PERIODIC_ENABLE
1062	inline void	1632	void inline_size
1063	periodics_reify (EV_P)	1633	periodics_reify (EV_P)
1064	{	1634	{
1065	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1635	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1066	{	1636	{
1067	struct ev_periodic *w = periodics [0];	1637	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1068		1638
1069	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1639	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1070		1640
1071	/* first reschedule or stop timer */	1641	/* first reschedule or stop timer */
1072	if (w->reschedule_cb)	1642	if (w->reschedule_cb)
1073	{	1643	{
1074	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1644	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1645
1075	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1646	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1647
		1648	ANHE_at_set (periodics [HEAP0]);
1076	downheap ((WT *)periodics, periodiccnt, 0);	1649	downheap (periodics, periodiccnt, HEAP0);
1077	}	1650	}
1078	else if (w->interval)	1651	else if (w->interval)
1079	{	1652	{
1080	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1653	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1081	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1654	/* if next trigger time is not sufficiently in the future, put it there */
		1655	/* this might happen because of floating point inexactness */
		1656	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1657	{
		1658	ev_at (w) += w->interval;
		1659
		1660	/* if interval is unreasonably low we might still have a time in the past */
		1661	/* so correct this. this will make the periodic very inexact, but the user */
		1662	/* has effectively asked to get triggered more often than possible */
		1663	if (ev_at (w) < ev_rt_now)
		1664	ev_at (w) = ev_rt_now;
		1665	}
		1666
		1667	ANHE_at_set (periodics [HEAP0]);
1082	downheap ((WT *)periodics, periodiccnt, 0);	1668	downheap (periodics, periodiccnt, HEAP0);
1083	}	1669	}
1084	else	1670	else
1085	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1671	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1086		1672
1087	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1673	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1088	}	1674	}
1089	}	1675	}
1090		1676
1091	static void	1677	static void noinline
1092	periodics_reschedule (EV_P)	1678	periodics_reschedule (EV_P)
1093	{	1679	{
1094	int i;	1680	int i;
1095		1681
1096	/* adjust periodics after time jump */	1682	/* adjust periodics after time jump */
		1683	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1684	{
		1685	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1686
		1687	if (w->reschedule_cb)
		1688	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1689	else if (w->interval)
		1690	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1691
		1692	ANHE_at_set (periodics [i]);
		1693	}
		1694
		1695	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1696	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
1097	for (i = 0; i < periodiccnt; ++i)	1697	for (i = 0; i < periodiccnt; ++i)
1098	{	1698	upheap (periodics, i + HEAP0);
1099	struct ev_periodic *w = periodics [i];	1699	}
		1700	#endif
1100		1701
1101	if (w->reschedule_cb)	1702	void inline_speed
1102	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1703	time_update (EV_P_ ev_tstamp max_block)
1103	else if (w->interval)	1704	{
1104	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1705	int i;
		1706
		1707	#if EV_USE_MONOTONIC
		1708	if (expect_true (have_monotonic))
1105	}	1709	{
		1710	ev_tstamp odiff = rtmn_diff;
1106		1711
1107	/* now rebuild the heap */
1108	for (i = periodiccnt >> 1; i--; )
1109	downheap ((WT *)periodics, periodiccnt, i);
1110	}
1111	#endif
1112
1113	inline int
1114	time_update_monotonic (EV_P)
1115	{
1116	mn_now = get_clock ();	1712	mn_now = get_clock ();
1117		1713
		1714	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1715	/* interpolate in the meantime */
1118	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1716	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1119	{	1717	{
1120	ev_rt_now = rtmn_diff + mn_now;	1718	ev_rt_now = rtmn_diff + mn_now;
1121	return 0;	1719	return;
1122	}	1720	}
1123	else	1721
1124	{
1125	now_floor = mn_now;	1722	now_floor = mn_now;
1126	ev_rt_now = ev_time ();	1723	ev_rt_now = ev_time ();
1127	return 1;
1128	}
1129	}
1130		1724
1131	inline void	1725	/* loop a few times, before making important decisions.
1132	time_update (EV_P)	1726	* on the choice of "4": one iteration isn't enough,
1133	{	1727	* in case we get preempted during the calls to
1134	int i;	1728	* ev_time and get_clock. a second call is almost guaranteed
1135		1729	* to succeed in that case, though. and looping a few more times
1136	#if EV_USE_MONOTONIC	1730	* doesn't hurt either as we only do this on time-jumps or
1137	if (expect_true (have_monotonic))	1731	* in the unlikely event of having been preempted here.
1138	{	1732	*/
1139	if (time_update_monotonic (EV_A))	1733	for (i = 4; --i; )
1140	{	1734	{
1141	ev_tstamp odiff = rtmn_diff;	1735	rtmn_diff = ev_rt_now - mn_now;
1142		1736
1143	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1737	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1738	return; /* all is well */
		1739
		1740	ev_rt_now = ev_time ();
		1741	mn_now = get_clock ();
		1742	now_floor = mn_now;
		1743	}
		1744
		1745	# if EV_PERIODIC_ENABLE
		1746	periodics_reschedule (EV_A);
		1747	# endif
		1748	/* no timer adjustment, as the monotonic clock doesn't jump */
		1749	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1750	}
		1751	else
		1752	#endif
		1753	{
		1754	ev_rt_now = ev_time ();
		1755
		1756	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1757	{
		1758	#if EV_PERIODIC_ENABLE
		1759	periodics_reschedule (EV_A);
		1760	#endif
		1761	/* adjust timers. this is easy, as the offset is the same for all of them */
		1762	for (i = 0; i < timercnt; ++i)
1144	{	1763	{
1145	rtmn_diff = ev_rt_now - mn_now;	1764	ANHE *he = timers + i + HEAP0;
1146		1765	ANHE_w (*he)->at += ev_rt_now - mn_now;
1147	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1766	ANHE_at_set (*he);
1148	return; /* all is well */
1149
1150	ev_rt_now = ev_time ();
1151	mn_now = get_clock ();
1152	now_floor = mn_now;
1153	}	1767	}
1154
1155	# if EV_PERIODICS
1156	periodics_reschedule (EV_A);
1157	# endif
1158	/* no timer adjustment, as the monotonic clock doesn't jump */
1159	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1160	}	1768	}
1161	}
1162	else
1163	#endif
1164	{
1165	ev_rt_now = ev_time ();
1166
1167	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1168	{
1169	#if EV_PERIODICS
1170	periodics_reschedule (EV_A);
1171	#endif
1172
1173	/* adjust timers. this is easy, as the offset is the same for all */
1174	for (i = 0; i < timercnt; ++i)
1175	((WT)timers [i])->at += ev_rt_now - mn_now;
1176	}
1177		1769
1178	mn_now = ev_rt_now;	1770	mn_now = ev_rt_now;
1179	}	1771	}
1180	}	1772	}
1181		1773
…		…
1194	static int loop_done;	1786	static int loop_done;
1195		1787
1196	void	1788	void
1197	ev_loop (EV_P_ int flags)	1789	ev_loop (EV_P_ int flags)
1198	{	1790	{
1199	double block;	1791	loop_done = EVUNLOOP_CANCEL;
1200	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1201		1792
1202	while (activecnt)	1793	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1794
		1795	do
1203	{	1796	{
		1797	#ifndef _WIN32
		1798	if (expect_false (curpid)) /* penalise the forking check even more */
		1799	if (expect_false (getpid () != curpid))
		1800	{
		1801	curpid = getpid ();
		1802	postfork = 1;
		1803	}
		1804	#endif
		1805
		1806	#if EV_FORK_ENABLE
		1807	/* we might have forked, so queue fork handlers */
		1808	if (expect_false (postfork))
		1809	if (forkcnt)
		1810	{
		1811	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1812	call_pending (EV_A);
		1813	}
		1814	#endif
		1815
1204	/* queue check watchers (and execute them) */	1816	/* queue prepare watchers (and execute them) */
1205	if (expect_false (preparecnt))	1817	if (expect_false (preparecnt))
1206	{	1818	{
1207	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1819	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1208	call_pending (EV_A);	1820	call_pending (EV_A);
1209	}	1821	}
1210		1822
		1823	if (expect_false (!activecnt))
		1824	break;
		1825
1211	/* we might have forked, so reify kernel state if necessary */	1826	/* we might have forked, so reify kernel state if necessary */
1212	if (expect_false (postfork))	1827	if (expect_false (postfork))
1213	loop_fork (EV_A);	1828	loop_fork (EV_A);
1214		1829
1215	/* update fd-related kernel structures */	1830	/* update fd-related kernel structures */
1216	fd_reify (EV_A);	1831	fd_reify (EV_A);
1217		1832
1218	/* calculate blocking time */	1833	/* calculate blocking time */
		1834	{
		1835	ev_tstamp waittime = 0.;
		1836	ev_tstamp sleeptime = 0.;
1219		1837
1220	/* we only need this for !monotonic clock or timers, but as we basically	1838	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1221	always have timers, we just calculate it always */
1222	#if EV_USE_MONOTONIC
1223	if (expect_true (have_monotonic))
1224	time_update_monotonic (EV_A);
1225	else
1226	#endif
1227	{	1839	{
1228	ev_rt_now = ev_time ();	1840	/* update time to cancel out callback processing overhead */
1229	mn_now = ev_rt_now;	1841	time_update (EV_A_ 1e100);
1230	}
1231		1842
1232	if (flags & EVLOOP_NONBLOCK || idlecnt)
1233	block = 0.;
1234	else
1235	{
1236	block = MAX_BLOCKTIME;	1843	waittime = MAX_BLOCKTIME;
1237		1844
1238	if (timercnt)	1845	if (timercnt)
1239	{	1846	{
1240	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1847	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1241	if (block > to) block = to;	1848	if (waittime > to) waittime = to;
1242	}	1849	}
1243		1850
1244	#if EV_PERIODICS	1851	#if EV_PERIODIC_ENABLE
1245	if (periodiccnt)	1852	if (periodiccnt)
1246	{	1853	{
1247	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1854	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1248	if (block > to) block = to;	1855	if (waittime > to) waittime = to;
1249	}	1856	}
1250	#endif	1857	#endif
1251		1858
1252	if (expect_false (block < 0.)) block = 0.;	1859	if (expect_false (waittime < timeout_blocktime))
		1860	waittime = timeout_blocktime;
		1861
		1862	sleeptime = waittime - backend_fudge;
		1863
		1864	if (expect_true (sleeptime > io_blocktime))
		1865	sleeptime = io_blocktime;
		1866
		1867	if (sleeptime)
		1868	{
		1869	ev_sleep (sleeptime);
		1870	waittime -= sleeptime;
		1871	}
1253	}	1872	}
1254		1873
1255	method_poll (EV_A_ block);	1874	++loop_count;
		1875	backend_poll (EV_A_ waittime);
1256		1876
1257	/* update ev_rt_now, do magic */	1877	/* update ev_rt_now, do magic */
1258	time_update (EV_A);	1878	time_update (EV_A_ waittime + sleeptime);
		1879	}
1259		1880
1260	/* queue pending timers and reschedule them */	1881	/* queue pending timers and reschedule them */
1261	timers_reify (EV_A); /* relative timers called last */	1882	timers_reify (EV_A); /* relative timers called last */
1262	#if EV_PERIODICS	1883	#if EV_PERIODIC_ENABLE
1263	periodics_reify (EV_A); /* absolute timers called first */	1884	periodics_reify (EV_A); /* absolute timers called first */
1264	#endif	1885	#endif
1265		1886
		1887	#if EV_IDLE_ENABLE
1266	/* queue idle watchers unless io or timers are pending */	1888	/* queue idle watchers unless other events are pending */
1267	if (idlecnt && !any_pending (EV_A))	1889	idle_reify (EV_A);
1268	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1890	#endif
1269		1891
1270	/* queue check watchers, to be executed first */	1892	/* queue check watchers, to be executed first */
1271	if (expect_false (checkcnt))	1893	if (expect_false (checkcnt))
1272	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1894	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1273		1895
1274	call_pending (EV_A);	1896	call_pending (EV_A);
1275
1276	if (expect_false (loop_done))
1277	break;
1278	}	1897	}
		1898	while (expect_true (
		1899	activecnt
		1900	&& !loop_done
		1901	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1902	));
1279		1903
1280	if (loop_done != 2)	1904	if (loop_done == EVUNLOOP_ONE)
1281	loop_done = 0;	1905	loop_done = EVUNLOOP_CANCEL;
1282	}	1906	}
1283		1907
1284	void	1908	void
1285	ev_unloop (EV_P_ int how)	1909	ev_unloop (EV_P_ int how)
1286	{	1910	{
1287	loop_done = how;	1911	loop_done = how;
1288	}	1912	}
1289		1913
1290	/*****************************************************************************/	1914	/*****************************************************************************/
1291		1915
1292	inline void	1916	void inline_size
1293	wlist_add (WL *head, WL elem)	1917	wlist_add (WL *head, WL elem)
1294	{	1918	{
1295	elem->next = *head;	1919	elem->next = *head;
1296	*head = elem;	1920	*head = elem;
1297	}	1921	}
1298		1922
1299	inline void	1923	void inline_size
1300	wlist_del (WL *head, WL elem)	1924	wlist_del (WL *head, WL elem)
1301	{	1925	{
1302	while (*head)	1926	while (*head)
1303	{	1927	{
1304	if (*head == elem)	1928	if (*head == elem)
…		…
1309		1933
1310	head = &(*head)->next;	1934	head = &(*head)->next;
1311	}	1935	}
1312	}	1936	}
1313		1937
1314	inline void	1938	void inline_speed
1315	ev_clear_pending (EV_P_ W w)	1939	clear_pending (EV_P_ W w)
1316	{	1940	{
1317	if (w->pending)	1941	if (w->pending)
1318	{	1942	{
1319	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1943	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1320	w->pending = 0;	1944	w->pending = 0;
1321	}	1945	}
1322	}	1946	}
1323		1947
1324	inline void	1948	int
		1949	ev_clear_pending (EV_P_ void *w)
		1950	{
		1951	W w_ = (W)w;
		1952	int pending = w_->pending;
		1953
		1954	if (expect_true (pending))
		1955	{
		1956	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1957	w_->pending = 0;
		1958	p->w = 0;
		1959	return p->events;
		1960	}
		1961	else
		1962	return 0;
		1963	}
		1964
		1965	void inline_size
		1966	pri_adjust (EV_P_ W w)
		1967	{
		1968	int pri = w->priority;
		1969	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1970	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1971	w->priority = pri;
		1972	}
		1973
		1974	void inline_speed
1325	ev_start (EV_P_ W w, int active)	1975	ev_start (EV_P_ W w, int active)
1326	{	1976	{
1327	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1977	pri_adjust (EV_A_ w);
1328	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1329
1330	w->active = active;	1978	w->active = active;
1331	ev_ref (EV_A);	1979	ev_ref (EV_A);
1332	}	1980	}
1333		1981
1334	inline void	1982	void inline_size
1335	ev_stop (EV_P_ W w)	1983	ev_stop (EV_P_ W w)
1336	{	1984	{
1337	ev_unref (EV_A);	1985	ev_unref (EV_A);
1338	w->active = 0;	1986	w->active = 0;
1339	}	1987	}
1340		1988
1341	/*****************************************************************************/	1989	/*****************************************************************************/
1342		1990
1343	void	1991	void noinline
1344	ev_io_start (EV_P_ struct ev_io *w)	1992	ev_io_start (EV_P_ ev_io *w)
1345	{	1993	{
1346	int fd = w->fd;	1994	int fd = w->fd;
1347		1995
1348	if (expect_false (ev_is_active (w)))	1996	if (expect_false (ev_is_active (w)))
1349	return;	1997	return;
1350		1998
1351	assert (("ev_io_start called with negative fd", fd >= 0));	1999	assert (("ev_io_start called with negative fd", fd >= 0));
1352		2000
1353	ev_start (EV_A_ (W)w, 1);	2001	ev_start (EV_A_ (W)w, 1);
1354	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2002	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1355	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2003	wlist_add (&anfds[fd].head, (WL)w);
1356		2004
1357	fd_change (EV_A_ fd);	2005	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		2006	w->events &= ~EV_IOFDSET;
1358	}	2007	}
1359		2008
1360	void	2009	void noinline
1361	ev_io_stop (EV_P_ struct ev_io *w)	2010	ev_io_stop (EV_P_ ev_io *w)
1362	{	2011	{
1363	ev_clear_pending (EV_A_ (W)w);	2012	clear_pending (EV_A_ (W)w);
1364	if (expect_false (!ev_is_active (w)))	2013	if (expect_false (!ev_is_active (w)))
1365	return;	2014	return;
1366		2015
1367	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2016	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1368		2017
1369	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2018	wlist_del (&anfds[w->fd].head, (WL)w);
1370	ev_stop (EV_A_ (W)w);	2019	ev_stop (EV_A_ (W)w);
1371		2020
1372	fd_change (EV_A_ w->fd);	2021	fd_change (EV_A_ w->fd, 1);
1373	}	2022	}
1374		2023
1375	void	2024	void noinline
1376	ev_timer_start (EV_P_ struct ev_timer *w)	2025	ev_timer_start (EV_P_ ev_timer *w)
1377	{	2026	{
1378	if (expect_false (ev_is_active (w)))	2027	if (expect_false (ev_is_active (w)))
1379	return;	2028	return;
1380		2029
1381	((WT)w)->at += mn_now;	2030	ev_at (w) += mn_now;
1382		2031
1383	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2032	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1384		2033
1385	ev_start (EV_A_ (W)w, ++timercnt);	2034	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1386	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2035	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1387	timers [timercnt - 1] = w;	2036	ANHE_w (timers [ev_active (w)]) = (WT)w;
1388	upheap ((WT *)timers, timercnt - 1);	2037	ANHE_at_set (timers [ev_active (w)]);
		2038	upheap (timers, ev_active (w));
1389		2039
1390	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2040	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1391	}	2041	}
1392		2042
1393	void	2043	void noinline
1394	ev_timer_stop (EV_P_ struct ev_timer *w)	2044	ev_timer_stop (EV_P_ ev_timer *w)
1395	{	2045	{
1396	ev_clear_pending (EV_A_ (W)w);	2046	clear_pending (EV_A_ (W)w);
1397	if (expect_false (!ev_is_active (w)))	2047	if (expect_false (!ev_is_active (w)))
1398	return;	2048	return;
1399		2049
		2050	{
		2051	int active = ev_active (w);
		2052
1400	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2053	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1401		2054
1402	if (expect_true (((W)w)->active < timercnt--))	2055	if (expect_true (active < timercnt + HEAP0 - 1))
1403	{	2056	{
1404	timers [((W)w)->active - 1] = timers [timercnt];	2057	timers [active] = timers [timercnt + HEAP0 - 1];
1405	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2058	adjustheap (timers, timercnt, active);
1406	}	2059	}
1407		2060
1408	((WT)w)->at -= mn_now;	2061	--timercnt;
		2062	}
		2063
		2064	ev_at (w) -= mn_now;
1409		2065
1410	ev_stop (EV_A_ (W)w);	2066	ev_stop (EV_A_ (W)w);
1411	}	2067	}
1412		2068
1413	void	2069	void noinline
1414	ev_timer_again (EV_P_ struct ev_timer *w)	2070	ev_timer_again (EV_P_ ev_timer *w)
1415	{	2071	{
1416	if (ev_is_active (w))	2072	if (ev_is_active (w))
1417	{	2073	{
1418	if (w->repeat)	2074	if (w->repeat)
1419	{	2075	{
1420	((WT)w)->at = mn_now + w->repeat;	2076	ev_at (w) = mn_now + w->repeat;
		2077	ANHE_at_set (timers [ev_active (w)]);
1421	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2078	adjustheap (timers, timercnt, ev_active (w));
1422	}	2079	}
1423	else	2080	else
1424	ev_timer_stop (EV_A_ w);	2081	ev_timer_stop (EV_A_ w);
1425	}	2082	}
1426	else if (w->repeat)	2083	else if (w->repeat)
1427	{	2084	{
1428	w->at = w->repeat;	2085	ev_at (w) = w->repeat;
1429	ev_timer_start (EV_A_ w);	2086	ev_timer_start (EV_A_ w);
1430	}	2087	}
1431	}	2088	}
1432		2089
1433	#if EV_PERIODICS	2090	#if EV_PERIODIC_ENABLE
1434	void	2091	void noinline
1435	ev_periodic_start (EV_P_ struct ev_periodic *w)	2092	ev_periodic_start (EV_P_ ev_periodic *w)
1436	{	2093	{
1437	if (expect_false (ev_is_active (w)))	2094	if (expect_false (ev_is_active (w)))
1438	return;	2095	return;
1439		2096
1440	if (w->reschedule_cb)	2097	if (w->reschedule_cb)
1441	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2098	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1442	else if (w->interval)	2099	else if (w->interval)
1443	{	2100	{
1444	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2101	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1445	/* this formula differs from the one in periodic_reify because we do not always round up */	2102	/* this formula differs from the one in periodic_reify because we do not always round up */
1446	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2103	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1447	}	2104	}
		2105	else
		2106	ev_at (w) = w->offset;
1448		2107
1449	ev_start (EV_A_ (W)w, ++periodiccnt);	2108	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1450	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2109	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1451	periodics [periodiccnt - 1] = w;	2110	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1452	upheap ((WT *)periodics, periodiccnt - 1);	2111	ANHE_at_set (periodics [ev_active (w)]);
		2112	upheap (periodics, ev_active (w));
1453		2113
1454	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2114	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1455	}	2115	}
1456		2116
1457	void	2117	void noinline
1458	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2118	ev_periodic_stop (EV_P_ ev_periodic *w)
1459	{	2119	{
1460	ev_clear_pending (EV_A_ (W)w);	2120	clear_pending (EV_A_ (W)w);
1461	if (expect_false (!ev_is_active (w)))	2121	if (expect_false (!ev_is_active (w)))
1462	return;	2122	return;
1463		2123
		2124	{
		2125	int active = ev_active (w);
		2126
1464	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2127	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1465		2128
1466	if (expect_true (((W)w)->active < periodiccnt--))	2129	if (expect_true (active < periodiccnt + HEAP0 - 1))
1467	{	2130	{
1468	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2131	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1469	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2132	adjustheap (periodics, periodiccnt, active);
1470	}	2133	}
		2134
		2135	--periodiccnt;
		2136	}
1471		2137
1472	ev_stop (EV_A_ (W)w);	2138	ev_stop (EV_A_ (W)w);
1473	}	2139	}
1474		2140
1475	void	2141	void noinline
1476	ev_periodic_again (EV_P_ struct ev_periodic *w)	2142	ev_periodic_again (EV_P_ ev_periodic *w)
1477	{	2143	{
1478	/* TODO: use adjustheap and recalculation */	2144	/* TODO: use adjustheap and recalculation */
1479	ev_periodic_stop (EV_A_ w);	2145	ev_periodic_stop (EV_A_ w);
1480	ev_periodic_start (EV_A_ w);	2146	ev_periodic_start (EV_A_ w);
1481	}	2147	}
1482	#endif	2148	#endif
1483		2149
1484	void	2150	#ifndef SA_RESTART
1485	ev_idle_start (EV_P_ struct ev_idle *w)	2151	# define SA_RESTART 0
		2152	#endif
		2153
		2154	void noinline
		2155	ev_signal_start (EV_P_ ev_signal *w)
1486	{	2156	{
		2157	#if EV_MULTIPLICITY
		2158	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2159	#endif
1487	if (expect_false (ev_is_active (w)))	2160	if (expect_false (ev_is_active (w)))
1488	return;	2161	return;
1489		2162
1490	ev_start (EV_A_ (W)w, ++idlecnt);
1491	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1492	idles [idlecnt - 1] = w;
1493	}
1494
1495	void
1496	ev_idle_stop (EV_P_ struct ev_idle *w)
1497	{
1498	ev_clear_pending (EV_A_ (W)w);
1499	if (expect_false (!ev_is_active (w)))
1500	return;
1501
1502	idles [((W)w)->active - 1] = idles [--idlecnt];
1503	ev_stop (EV_A_ (W)w);
1504	}
1505
1506	void
1507	ev_prepare_start (EV_P_ struct ev_prepare *w)
1508	{
1509	if (expect_false (ev_is_active (w)))
1510	return;
1511
1512	ev_start (EV_A_ (W)w, ++preparecnt);
1513	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1514	prepares [preparecnt - 1] = w;
1515	}
1516
1517	void
1518	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1519	{
1520	ev_clear_pending (EV_A_ (W)w);
1521	if (expect_false (!ev_is_active (w)))
1522	return;
1523
1524	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1525	ev_stop (EV_A_ (W)w);
1526	}
1527
1528	void
1529	ev_check_start (EV_P_ struct ev_check *w)
1530	{
1531	if (expect_false (ev_is_active (w)))
1532	return;
1533
1534	ev_start (EV_A_ (W)w, ++checkcnt);
1535	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1536	checks [checkcnt - 1] = w;
1537	}
1538
1539	void
1540	ev_check_stop (EV_P_ struct ev_check *w)
1541	{
1542	ev_clear_pending (EV_A_ (W)w);
1543	if (expect_false (!ev_is_active (w)))
1544	return;
1545
1546	checks [((W)w)->active - 1] = checks [--checkcnt];
1547	ev_stop (EV_A_ (W)w);
1548	}
1549
1550	#ifndef SA_RESTART
1551	# define SA_RESTART 0
1552	#endif
1553
1554	void
1555	ev_signal_start (EV_P_ struct ev_signal *w)
1556	{
1557	#if EV_MULTIPLICITY
1558	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1559	#endif
1560	if (expect_false (ev_is_active (w)))
1561	return;
1562
1563	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2163	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1564		2164
		2165	evpipe_init (EV_A);
		2166
		2167	{
		2168	#ifndef _WIN32
		2169	sigset_t full, prev;
		2170	sigfillset (&full);
		2171	sigprocmask (SIG_SETMASK, &full, &prev);
		2172	#endif
		2173
		2174	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2175
		2176	#ifndef _WIN32
		2177	sigprocmask (SIG_SETMASK, &prev, 0);
		2178	#endif
		2179	}
		2180
1565	ev_start (EV_A_ (W)w, 1);	2181	ev_start (EV_A_ (W)w, 1);
1566	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1567	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2182	wlist_add (&signals [w->signum - 1].head, (WL)w);
1568		2183
1569	if (!((WL)w)->next)	2184	if (!((WL)w)->next)
1570	{	2185	{
1571	#if _WIN32	2186	#if _WIN32
1572	signal (w->signum, sighandler);	2187	signal (w->signum, ev_sighandler);
1573	#else	2188	#else
1574	struct sigaction sa;	2189	struct sigaction sa;
1575	sa.sa_handler = sighandler;	2190	sa.sa_handler = ev_sighandler;
1576	sigfillset (&sa.sa_mask);	2191	sigfillset (&sa.sa_mask);
1577	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2192	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1578	sigaction (w->signum, &sa, 0);	2193	sigaction (w->signum, &sa, 0);
1579	#endif	2194	#endif
1580	}	2195	}
1581	}	2196	}
1582		2197
1583	void	2198	void noinline
1584	ev_signal_stop (EV_P_ struct ev_signal *w)	2199	ev_signal_stop (EV_P_ ev_signal *w)
1585	{	2200	{
1586	ev_clear_pending (EV_A_ (W)w);	2201	clear_pending (EV_A_ (W)w);
1587	if (expect_false (!ev_is_active (w)))	2202	if (expect_false (!ev_is_active (w)))
1588	return;	2203	return;
1589		2204
1590	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2205	wlist_del (&signals [w->signum - 1].head, (WL)w);
1591	ev_stop (EV_A_ (W)w);	2206	ev_stop (EV_A_ (W)w);
1592		2207
1593	if (!signals [w->signum - 1].head)	2208	if (!signals [w->signum - 1].head)
1594	signal (w->signum, SIG_DFL);	2209	signal (w->signum, SIG_DFL);
1595	}	2210	}
1596		2211
1597	void	2212	void
1598	ev_child_start (EV_P_ struct ev_child *w)	2213	ev_child_start (EV_P_ ev_child *w)
1599	{	2214	{
1600	#if EV_MULTIPLICITY	2215	#if EV_MULTIPLICITY
1601	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2216	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1602	#endif	2217	#endif
1603	if (expect_false (ev_is_active (w)))	2218	if (expect_false (ev_is_active (w)))
1604	return;	2219	return;
1605		2220
1606	ev_start (EV_A_ (W)w, 1);	2221	ev_start (EV_A_ (W)w, 1);
1607	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2222	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1608	}	2223	}
1609		2224
1610	void	2225	void
1611	ev_child_stop (EV_P_ struct ev_child *w)	2226	ev_child_stop (EV_P_ ev_child *w)
1612	{	2227	{
1613	ev_clear_pending (EV_A_ (W)w);	2228	clear_pending (EV_A_ (W)w);
1614	if (expect_false (!ev_is_active (w)))	2229	if (expect_false (!ev_is_active (w)))
1615	return;	2230	return;
1616		2231
1617	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2232	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1618	ev_stop (EV_A_ (W)w);	2233	ev_stop (EV_A_ (W)w);
1619	}	2234	}
1620		2235
		2236	#if EV_STAT_ENABLE
		2237
		2238	# ifdef _WIN32
		2239	# undef lstat
		2240	# define lstat(a,b) _stati64 (a,b)
		2241	# endif
		2242
		2243	#define DEF_STAT_INTERVAL 5.0074891
		2244	#define MIN_STAT_INTERVAL 0.1074891
		2245
		2246	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2247
		2248	#if EV_USE_INOTIFY
		2249	# define EV_INOTIFY_BUFSIZE 8192
		2250
		2251	static void noinline
		2252	infy_add (EV_P_ ev_stat *w)
		2253	{
		2254	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2255
		2256	if (w->wd < 0)
		2257	{
		2258	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2259
		2260	/* monitor some parent directory for speedup hints */
		2261	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2262	/* but an efficiency issue only */
		2263	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2264	{
		2265	char path [4096];
		2266	strcpy (path, w->path);
		2267
		2268	do
		2269	{
		2270	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2271	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2272
		2273	char *pend = strrchr (path, '/');
		2274
		2275	if (!pend)
		2276	break; /* whoops, no '/', complain to your admin */
		2277
		2278	*pend = 0;
		2279	w->wd = inotify_add_watch (fs_fd, path, mask);
		2280	}
		2281	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2282	}
		2283	}
		2284	else
		2285	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2286
		2287	if (w->wd >= 0)
		2288	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2289	}
		2290
		2291	static void noinline
		2292	infy_del (EV_P_ ev_stat *w)
		2293	{
		2294	int slot;
		2295	int wd = w->wd;
		2296
		2297	if (wd < 0)
		2298	return;
		2299
		2300	w->wd = -2;
		2301	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2302	wlist_del (&fs_hash [slot].head, (WL)w);
		2303
		2304	/* remove this watcher, if others are watching it, they will rearm */
		2305	inotify_rm_watch (fs_fd, wd);
		2306	}
		2307
		2308	static void noinline
		2309	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2310	{
		2311	if (slot < 0)
		2312	/* overflow, need to check for all hahs slots */
		2313	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2314	infy_wd (EV_A_ slot, wd, ev);
		2315	else
		2316	{
		2317	WL w_;
		2318
		2319	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2320	{
		2321	ev_stat *w = (ev_stat *)w_;
		2322	w_ = w_->next; /* lets us remove this watcher and all before it */
		2323
		2324	if (w->wd == wd || wd == -1)
		2325	{
		2326	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2327	{
		2328	w->wd = -1;
		2329	infy_add (EV_A_ w); /* re-add, no matter what */
		2330	}
		2331
		2332	stat_timer_cb (EV_A_ &w->timer, 0);
		2333	}
		2334	}
		2335	}
		2336	}
		2337
		2338	static void
		2339	infy_cb (EV_P_ ev_io *w, int revents)
		2340	{
		2341	char buf [EV_INOTIFY_BUFSIZE];
		2342	struct inotify_event *ev = (struct inotify_event *)buf;
		2343	int ofs;
		2344	int len = read (fs_fd, buf, sizeof (buf));
		2345
		2346	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2347	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2348	}
		2349
		2350	void inline_size
		2351	infy_init (EV_P)
		2352	{
		2353	if (fs_fd != -2)
		2354	return;
		2355
		2356	fs_fd = inotify_init ();
		2357
		2358	if (fs_fd >= 0)
		2359	{
		2360	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2361	ev_set_priority (&fs_w, EV_MAXPRI);
		2362	ev_io_start (EV_A_ &fs_w);
		2363	}
		2364	}
		2365
		2366	void inline_size
		2367	infy_fork (EV_P)
		2368	{
		2369	int slot;
		2370
		2371	if (fs_fd < 0)
		2372	return;
		2373
		2374	close (fs_fd);
		2375	fs_fd = inotify_init ();
		2376
		2377	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2378	{
		2379	WL w_ = fs_hash [slot].head;
		2380	fs_hash [slot].head = 0;
		2381
		2382	while (w_)
		2383	{
		2384	ev_stat *w = (ev_stat *)w_;
		2385	w_ = w_->next; /* lets us add this watcher */
		2386
		2387	w->wd = -1;
		2388
		2389	if (fs_fd >= 0)
		2390	infy_add (EV_A_ w); /* re-add, no matter what */
		2391	else
		2392	ev_timer_start (EV_A_ &w->timer);
		2393	}
		2394
		2395	}
		2396	}
		2397
		2398	#endif
		2399
		2400	void
		2401	ev_stat_stat (EV_P_ ev_stat *w)
		2402	{
		2403	if (lstat (w->path, &w->attr) < 0)
		2404	w->attr.st_nlink = 0;
		2405	else if (!w->attr.st_nlink)
		2406	w->attr.st_nlink = 1;
		2407	}
		2408
		2409	static void noinline
		2410	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2411	{
		2412	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2413
		2414	/* we copy this here each the time so that */
		2415	/* prev has the old value when the callback gets invoked */
		2416	w->prev = w->attr;
		2417	ev_stat_stat (EV_A_ w);
		2418
		2419	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2420	if (
		2421	w->prev.st_dev != w->attr.st_dev
		2422	|| w->prev.st_ino != w->attr.st_ino
		2423	|| w->prev.st_mode != w->attr.st_mode
		2424	|| w->prev.st_nlink != w->attr.st_nlink
		2425	|| w->prev.st_uid != w->attr.st_uid
		2426	|| w->prev.st_gid != w->attr.st_gid
		2427	|| w->prev.st_rdev != w->attr.st_rdev
		2428	|| w->prev.st_size != w->attr.st_size
		2429	|| w->prev.st_atime != w->attr.st_atime
		2430	|| w->prev.st_mtime != w->attr.st_mtime
		2431	|| w->prev.st_ctime != w->attr.st_ctime
		2432	) {
		2433	#if EV_USE_INOTIFY
		2434	infy_del (EV_A_ w);
		2435	infy_add (EV_A_ w);
		2436	ev_stat_stat (EV_A_ w); /* avoid race... */
		2437	#endif
		2438
		2439	ev_feed_event (EV_A_ w, EV_STAT);
		2440	}
		2441	}
		2442
		2443	void
		2444	ev_stat_start (EV_P_ ev_stat *w)
		2445	{
		2446	if (expect_false (ev_is_active (w)))
		2447	return;
		2448
		2449	/* since we use memcmp, we need to clear any padding data etc. */
		2450	memset (&w->prev, 0, sizeof (ev_statdata));
		2451	memset (&w->attr, 0, sizeof (ev_statdata));
		2452
		2453	ev_stat_stat (EV_A_ w);
		2454
		2455	if (w->interval < MIN_STAT_INTERVAL)
		2456	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2457
		2458	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2459	ev_set_priority (&w->timer, ev_priority (w));
		2460
		2461	#if EV_USE_INOTIFY
		2462	infy_init (EV_A);
		2463
		2464	if (fs_fd >= 0)
		2465	infy_add (EV_A_ w);
		2466	else
		2467	#endif
		2468	ev_timer_start (EV_A_ &w->timer);
		2469
		2470	ev_start (EV_A_ (W)w, 1);
		2471	}
		2472
		2473	void
		2474	ev_stat_stop (EV_P_ ev_stat *w)
		2475	{
		2476	clear_pending (EV_A_ (W)w);
		2477	if (expect_false (!ev_is_active (w)))
		2478	return;
		2479
		2480	#if EV_USE_INOTIFY
		2481	infy_del (EV_A_ w);
		2482	#endif
		2483	ev_timer_stop (EV_A_ &w->timer);
		2484
		2485	ev_stop (EV_A_ (W)w);
		2486	}
		2487	#endif
		2488
		2489	#if EV_IDLE_ENABLE
		2490	void
		2491	ev_idle_start (EV_P_ ev_idle *w)
		2492	{
		2493	if (expect_false (ev_is_active (w)))
		2494	return;
		2495
		2496	pri_adjust (EV_A_ (W)w);
		2497
		2498	{
		2499	int active = ++idlecnt [ABSPRI (w)];
		2500
		2501	++idleall;
		2502	ev_start (EV_A_ (W)w, active);
		2503
		2504	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2505	idles [ABSPRI (w)][active - 1] = w;
		2506	}
		2507	}
		2508
		2509	void
		2510	ev_idle_stop (EV_P_ ev_idle *w)
		2511	{
		2512	clear_pending (EV_A_ (W)w);
		2513	if (expect_false (!ev_is_active (w)))
		2514	return;
		2515
		2516	{
		2517	int active = ev_active (w);
		2518
		2519	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2520	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2521
		2522	ev_stop (EV_A_ (W)w);
		2523	--idleall;
		2524	}
		2525	}
		2526	#endif
		2527
		2528	void
		2529	ev_prepare_start (EV_P_ ev_prepare *w)
		2530	{
		2531	if (expect_false (ev_is_active (w)))
		2532	return;
		2533
		2534	ev_start (EV_A_ (W)w, ++preparecnt);
		2535	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2536	prepares [preparecnt - 1] = w;
		2537	}
		2538
		2539	void
		2540	ev_prepare_stop (EV_P_ ev_prepare *w)
		2541	{
		2542	clear_pending (EV_A_ (W)w);
		2543	if (expect_false (!ev_is_active (w)))
		2544	return;
		2545
		2546	{
		2547	int active = ev_active (w);
		2548
		2549	prepares [active - 1] = prepares [--preparecnt];
		2550	ev_active (prepares [active - 1]) = active;
		2551	}
		2552
		2553	ev_stop (EV_A_ (W)w);
		2554	}
		2555
		2556	void
		2557	ev_check_start (EV_P_ ev_check *w)
		2558	{
		2559	if (expect_false (ev_is_active (w)))
		2560	return;
		2561
		2562	ev_start (EV_A_ (W)w, ++checkcnt);
		2563	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2564	checks [checkcnt - 1] = w;
		2565	}
		2566
		2567	void
		2568	ev_check_stop (EV_P_ ev_check *w)
		2569	{
		2570	clear_pending (EV_A_ (W)w);
		2571	if (expect_false (!ev_is_active (w)))
		2572	return;
		2573
		2574	{
		2575	int active = ev_active (w);
		2576
		2577	checks [active - 1] = checks [--checkcnt];
		2578	ev_active (checks [active - 1]) = active;
		2579	}
		2580
		2581	ev_stop (EV_A_ (W)w);
		2582	}
		2583
		2584	#if EV_EMBED_ENABLE
		2585	void noinline
		2586	ev_embed_sweep (EV_P_ ev_embed *w)
		2587	{
		2588	ev_loop (w->other, EVLOOP_NONBLOCK);
		2589	}
		2590
		2591	static void
		2592	embed_io_cb (EV_P_ ev_io *io, int revents)
		2593	{
		2594	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2595
		2596	if (ev_cb (w))
		2597	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2598	else
		2599	ev_loop (w->other, EVLOOP_NONBLOCK);
		2600	}
		2601
		2602	static void
		2603	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2604	{
		2605	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2606
		2607	{
		2608	struct ev_loop *loop = w->other;
		2609
		2610	while (fdchangecnt)
		2611	{
		2612	fd_reify (EV_A);
		2613	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2614	}
		2615	}
		2616	}
		2617
		2618	#if 0
		2619	static void
		2620	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2621	{
		2622	ev_idle_stop (EV_A_ idle);
		2623	}
		2624	#endif
		2625
		2626	void
		2627	ev_embed_start (EV_P_ ev_embed *w)
		2628	{
		2629	if (expect_false (ev_is_active (w)))
		2630	return;
		2631
		2632	{
		2633	struct ev_loop *loop = w->other;
		2634	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2635	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2636	}
		2637
		2638	ev_set_priority (&w->io, ev_priority (w));
		2639	ev_io_start (EV_A_ &w->io);
		2640
		2641	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2642	ev_set_priority (&w->prepare, EV_MINPRI);
		2643	ev_prepare_start (EV_A_ &w->prepare);
		2644
		2645	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2646
		2647	ev_start (EV_A_ (W)w, 1);
		2648	}
		2649
		2650	void
		2651	ev_embed_stop (EV_P_ ev_embed *w)
		2652	{
		2653	clear_pending (EV_A_ (W)w);
		2654	if (expect_false (!ev_is_active (w)))
		2655	return;
		2656
		2657	ev_io_stop (EV_A_ &w->io);
		2658	ev_prepare_stop (EV_A_ &w->prepare);
		2659
		2660	ev_stop (EV_A_ (W)w);
		2661	}
		2662	#endif
		2663
		2664	#if EV_FORK_ENABLE
		2665	void
		2666	ev_fork_start (EV_P_ ev_fork *w)
		2667	{
		2668	if (expect_false (ev_is_active (w)))
		2669	return;
		2670
		2671	ev_start (EV_A_ (W)w, ++forkcnt);
		2672	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2673	forks [forkcnt - 1] = w;
		2674	}
		2675
		2676	void
		2677	ev_fork_stop (EV_P_ ev_fork *w)
		2678	{
		2679	clear_pending (EV_A_ (W)w);
		2680	if (expect_false (!ev_is_active (w)))
		2681	return;
		2682
		2683	{
		2684	int active = ev_active (w);
		2685
		2686	forks [active - 1] = forks [--forkcnt];
		2687	ev_active (forks [active - 1]) = active;
		2688	}
		2689
		2690	ev_stop (EV_A_ (W)w);
		2691	}
		2692	#endif
		2693
		2694	#if EV_ASYNC_ENABLE
		2695	void
		2696	ev_async_start (EV_P_ ev_async *w)
		2697	{
		2698	if (expect_false (ev_is_active (w)))
		2699	return;
		2700
		2701	evpipe_init (EV_A);
		2702
		2703	ev_start (EV_A_ (W)w, ++asynccnt);
		2704	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2705	asyncs [asynccnt - 1] = w;
		2706	}
		2707
		2708	void
		2709	ev_async_stop (EV_P_ ev_async *w)
		2710	{
		2711	clear_pending (EV_A_ (W)w);
		2712	if (expect_false (!ev_is_active (w)))
		2713	return;
		2714
		2715	{
		2716	int active = ev_active (w);
		2717
		2718	asyncs [active - 1] = asyncs [--asynccnt];
		2719	ev_active (asyncs [active - 1]) = active;
		2720	}
		2721
		2722	ev_stop (EV_A_ (W)w);
		2723	}
		2724
		2725	void
		2726	ev_async_send (EV_P_ ev_async *w)
		2727	{
		2728	w->sent = 1;
		2729	evpipe_write (EV_A_ &gotasync);
		2730	}
		2731	#endif
		2732
1621	/*****************************************************************************/	2733	/*****************************************************************************/
1622		2734
1623	struct ev_once	2735	struct ev_once
1624	{	2736	{
1625	struct ev_io io;	2737	ev_io io;
1626	struct ev_timer to;	2738	ev_timer to;
1627	void (*cb)(int revents, void *arg);	2739	void (*cb)(int revents, void *arg);
1628	void *arg;	2740	void *arg;
1629	};	2741	};
1630		2742
1631	static void	2743	static void
…		…
1640		2752
1641	cb (revents, arg);	2753	cb (revents, arg);
1642	}	2754	}
1643		2755
1644	static void	2756	static void
1645	once_cb_io (EV_P_ struct ev_io *w, int revents)	2757	once_cb_io (EV_P_ ev_io *w, int revents)
1646	{	2758	{
1647	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2759	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1648	}	2760	}
1649		2761
1650	static void	2762	static void
1651	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2763	once_cb_to (EV_P_ ev_timer *w, int revents)
1652	{	2764	{
1653	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2765	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1654	}	2766	}
1655		2767
1656	void	2768	void
…		…
1680	ev_timer_set (&once->to, timeout, 0.);	2792	ev_timer_set (&once->to, timeout, 0.);
1681	ev_timer_start (EV_A_ &once->to);	2793	ev_timer_start (EV_A_ &once->to);
1682	}	2794	}
1683	}	2795	}
1684		2796
		2797	#if EV_MULTIPLICITY
		2798	#include "ev_wrap.h"
		2799	#endif
		2800
1685	#ifdef __cplusplus	2801	#ifdef __cplusplus
1686	}	2802	}
1687	#endif	2803	#endif
1688		2804

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