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Comparing libev/ev.c (file contents):
Revision 1.47 by root, Sat Nov 3 11:44:44 2007 UTC vs.
Revision 1.251 by root, Thu May 22 03:42:34 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# include "config.h"	49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		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
33	#endif	132	#endif
34		133
35	#include <math.h>	134	#include <math.h>
36	#include <stdlib.h>	135	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	136	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	137	#include <stddef.h>
41		138
42	#include <stdio.h>	139	#include <stdio.h>
43		140
44	#include <assert.h>	141	#include <assert.h>
45	#include <errno.h>	142	#include <errno.h>
46	#include <sys/types.h>	143	#include <sys/types.h>
		144	#include <time.h>
		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
47	#ifndef WIN32	154	#ifndef _WIN32
		155	# include <sys/time.h>
48	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
49	#endif	163	# endif
50	#include <sys/time.h>	164	#endif
51	#include <time.h>
52		165
53	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
54		167
55	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
57	#endif	178	#endif
58		179
59	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
61	#endif	182	#endif
62		183
63	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
65	#endif	190	#endif
66		191
67	#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
68	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
69	#endif	198	#endif
70		199
71	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
73	#endif	202	#endif
74		203
75	#ifndef EV_USE_REALTIME	204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
76	# define EV_USE_REALTIME 1	210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
77	#endif	213	# endif
		214	#endif
78		215
79	/**/	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	#if 0 /* debugging */
		241	# define EV_VERIFY 3
		242	# define EV_USE_4HEAP 1
		243	# define EV_HEAP_CACHE_AT 1
		244	#endif
		245
		246	#ifndef EV_VERIFY
		247	# define EV_VERIFY !EV_MINIMAL
		248	#endif
		249
		250	#ifndef EV_USE_4HEAP
		251	# define EV_USE_4HEAP !EV_MINIMAL
		252	#endif
		253
		254	#ifndef EV_HEAP_CACHE_AT
		255	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		256	#endif
		257
		258	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
80		259
81	#ifndef CLOCK_MONOTONIC	260	#ifndef CLOCK_MONOTONIC
82	# undef EV_USE_MONOTONIC	261	# undef EV_USE_MONOTONIC
83	# define EV_USE_MONOTONIC 0	262	# define EV_USE_MONOTONIC 0
84	#endif	263	#endif
…		…
86	#ifndef CLOCK_REALTIME	265	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	266	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	267	# define EV_USE_REALTIME 0
89	#endif	268	#endif
90		269
		270	#if !EV_STAT_ENABLE
		271	# undef EV_USE_INOTIFY
		272	# define EV_USE_INOTIFY 0
		273	#endif
		274
		275	#if !EV_USE_NANOSLEEP
		276	# ifndef _WIN32
		277	# include <sys/select.h>
		278	# endif
		279	#endif
		280
		281	#if EV_USE_INOTIFY
		282	# include <sys/inotify.h>
		283	#endif
		284
		285	#if EV_SELECT_IS_WINSOCKET
		286	# include <winsock.h>
		287	#endif
		288
		289	#if EV_USE_EVENTFD
		290	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		291	# include <stdint.h>
		292	# ifdef __cplusplus
		293	extern "C" {
		294	# endif
		295	int eventfd (unsigned int initval, int flags);
		296	# ifdef __cplusplus
		297	}
		298	# endif
		299	#endif
		300
91	/**/	301	/**/
92		302
		303	#if EV_VERIFY >= 3
		304	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		305	#else
		306	# define EV_FREQUENT_CHECK do { } while (0)
		307	#endif
		308
		309	/*
		310	* This is used to avoid floating point rounding problems.
		311	* It is added to ev_rt_now when scheduling periodics
		312	* to ensure progress, time-wise, even when rounding
		313	* errors are against us.
		314	* This value is good at least till the year 4000.
		315	* Better solutions welcome.
		316	*/
		317	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		318
93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	319	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	320	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	321	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97		322
98	#include "ev.h"
99
100	#if __GNUC__ >= 3	323	#if __GNUC__ >= 4
101	# define expect(expr,value) __builtin_expect ((expr),(value))	324	# define expect(expr,value) __builtin_expect ((expr),(value))
102	# define inline inline	325	# define noinline __attribute__ ((noinline))
103	#else	326	#else
104	# define expect(expr,value) (expr)	327	# define expect(expr,value) (expr)
105	# define inline static	328	# define noinline
		329	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		330	# define inline
		331	# endif
106	#endif	332	#endif
107		333
108	#define expect_false(expr) expect ((expr) != 0, 0)	334	#define expect_false(expr) expect ((expr) != 0, 0)
109	#define expect_true(expr) expect ((expr) != 0, 1)	335	#define expect_true(expr) expect ((expr) != 0, 1)
		336	#define inline_size static inline
		337
		338	#if EV_MINIMAL
		339	# define inline_speed static noinline
		340	#else
		341	# define inline_speed static inline
		342	#endif
110		343
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	344	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	345	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113		346
		347	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		348	#define EMPTY2(a,b) /* used to suppress some warnings */
		349
114	typedef struct ev_watcher *W;	350	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	351	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	352	typedef ev_watcher_time *WT;
117		353
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	354	#define ev_active(w) ((W)(w))->active
		355	#define ev_at(w) ((WT)(w))->at
		356
		357	#if EV_USE_MONOTONIC
		358	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		359	/* giving it a reasonably high chance of working on typical architetcures */
		360	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		361	#endif
		362
		363	#ifdef _WIN32
		364	# include "ev_win32.c"
		365	#endif
		366
		367	/*****************************************************************************/
		368
		369	static void (*syserr_cb)(const char *msg);
		370
		371	void
		372	ev_set_syserr_cb (void (*cb)(const char *msg))
		373	{
		374	syserr_cb = cb;
		375	}
		376
		377	static void noinline
		378	syserr (const char *msg)
		379	{
		380	if (!msg)
		381	msg = "(libev) system error";
		382
		383	if (syserr_cb)
		384	syserr_cb (msg);
		385	else
		386	{
		387	perror (msg);
		388	abort ();
		389	}
		390	}
		391
		392	static void *
		393	ev_realloc_emul (void *ptr, long size)
		394	{
		395	/* some systems, notably openbsd and darwin, fail to properly
		396	* implement realloc (x, 0) (as required by both ansi c-98 and
		397	* the single unix specification, so work around them here.
		398	*/
		399
		400	if (size)
		401	return realloc (ptr, size);
		402
		403	free (ptr);
		404	return 0;
		405	}
		406
		407	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		408
		409	void
		410	ev_set_allocator (void *(*cb)(void *ptr, long size))
		411	{
		412	alloc = cb;
		413	}
		414
		415	inline_speed void *
		416	ev_realloc (void *ptr, long size)
		417	{
		418	ptr = alloc (ptr, size);
		419
		420	if (!ptr && size)
		421	{
		422	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		423	abort ();
		424	}
		425
		426	return ptr;
		427	}
		428
		429	#define ev_malloc(size) ev_realloc (0, (size))
		430	#define ev_free(ptr) ev_realloc ((ptr), 0)
		431
		432	/*****************************************************************************/
		433
		434	typedef struct
		435	{
		436	WL head;
		437	unsigned char events;
		438	unsigned char reify;
		439	#if EV_SELECT_IS_WINSOCKET
		440	SOCKET handle;
		441	#endif
		442	} ANFD;
		443
		444	typedef struct
		445	{
		446	W w;
		447	int events;
		448	} ANPENDING;
		449
		450	#if EV_USE_INOTIFY
		451	/* hash table entry per inotify-id */
		452	typedef struct
		453	{
		454	WL head;
		455	} ANFS;
		456	#endif
		457
		458	/* Heap Entry */
		459	#if EV_HEAP_CACHE_AT
		460	typedef struct {
		461	ev_tstamp at;
		462	WT w;
		463	} ANHE;
		464
		465	#define ANHE_w(he) (he).w /* access watcher, read-write */
		466	#define ANHE_at(he) (he).at /* access cached at, read-only */
		467	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		468	#else
		469	typedef WT ANHE;
		470
		471	#define ANHE_w(he) (he)
		472	#define ANHE_at(he) (he)->at
		473	#define ANHE_at_cache(he)
		474	#endif
		475
		476	#if EV_MULTIPLICITY
		477
		478	struct ev_loop
		479	{
		480	ev_tstamp ev_rt_now;
		481	#define ev_rt_now ((loop)->ev_rt_now)
		482	#define VAR(name,decl) decl;
		483	#include "ev_vars.h"
		484	#undef VAR
		485	};
		486	#include "ev_wrap.h"
		487
		488	static struct ev_loop default_loop_struct;
		489	struct ev_loop *ev_default_loop_ptr;
		490
		491	#else
		492
119	ev_tstamp ev_now;	493	ev_tstamp ev_rt_now;
120	int ev_method;	494	#define VAR(name,decl) static decl;
		495	#include "ev_vars.h"
		496	#undef VAR
121		497
122	static int have_monotonic; /* runtime */	498	static int ev_default_loop_ptr;
123		499
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	500	#endif
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		501
128	/*****************************************************************************/	502	/*****************************************************************************/
129		503
130	ev_tstamp	504	ev_tstamp
131	ev_time (void)	505	ev_time (void)
…		…
139	gettimeofday (&tv, 0);	513	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	514	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	515	#endif
142	}	516	}
143		517
144	static ev_tstamp	518	ev_tstamp inline_size
145	get_clock (void)	519	get_clock (void)
146	{	520	{
147	#if EV_USE_MONOTONIC	521	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	522	if (expect_true (have_monotonic))
149	{	523	{
…		…
154	#endif	528	#endif
155		529
156	return ev_time ();	530	return ev_time ();
157	}	531	}
158		532
159	#define array_roundsize(base,n) ((n) | 4 & ~3)	533	#if EV_MULTIPLICITY
		534	ev_tstamp
		535	ev_now (EV_P)
		536	{
		537	return ev_rt_now;
		538	}
		539	#endif
160		540
161	#define array_needsize(base,cur,cnt,init) \	541	void
162	if (expect_false ((cnt) > cur)) \	542	ev_sleep (ev_tstamp delay)
163	{ \	543	{
164	int newcnt = cur; \	544	if (delay > 0.)
165	do \
166	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \
168	} \
169	while ((cnt) > newcnt); \
170	\
171	base = realloc (base, sizeof (*base) * (newcnt)); \
172	init (base + cur, newcnt - cur); \
173	cur = newcnt; \
174	}	545	{
		546	#if EV_USE_NANOSLEEP
		547	struct timespec ts;
		548
		549	ts.tv_sec = (time_t)delay;
		550	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		551
		552	nanosleep (&ts, 0);
		553	#elif defined(_WIN32)
		554	Sleep ((unsigned long)(delay * 1e3));
		555	#else
		556	struct timeval tv;
		557
		558	tv.tv_sec = (time_t)delay;
		559	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		560
		561	select (0, 0, 0, 0, &tv);
		562	#endif
		563	}
		564	}
175		565
176	/*****************************************************************************/	566	/*****************************************************************************/
177		567
178	typedef struct	568	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
179	{
180	struct ev_io *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184		569
185	static ANFD *anfds;	570	int inline_size
186	static int anfdmax;	571	array_nextsize (int elem, int cur, int cnt)
		572	{
		573	int ncur = cur + 1;
187		574
188	static void	575	do
		576	ncur <<= 1;
		577	while (cnt > ncur);
		578
		579	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		580	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		581	{
		582	ncur *= elem;
		583	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		584	ncur = ncur - sizeof (void *) * 4;
		585	ncur /= elem;
		586	}
		587
		588	return ncur;
		589	}
		590
		591	static noinline void *
		592	array_realloc (int elem, void *base, int *cur, int cnt)
		593	{
		594	*cur = array_nextsize (elem, *cur, cnt);
		595	return ev_realloc (base, elem * *cur);
		596	}
		597
		598	#define array_needsize(type,base,cur,cnt,init) \
		599	if (expect_false ((cnt) > (cur))) \
		600	{ \
		601	int ocur_ = (cur); \
		602	(base) = (type *)array_realloc \
		603	(sizeof (type), (base), &(cur), (cnt)); \
		604	init ((base) + (ocur_), (cur) - ocur_); \
		605	}
		606
		607	#if 0
		608	#define array_slim(type,stem) \
		609	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		610	{ \
		611	stem ## max = array_roundsize (stem ## cnt >> 1); \
		612	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		613	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		614	}
		615	#endif
		616
		617	#define array_free(stem, idx) \
		618	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		619
		620	/*****************************************************************************/
		621
		622	void noinline
		623	ev_feed_event (EV_P_ void *w, int revents)
		624	{
		625	W w_ = (W)w;
		626	int pri = ABSPRI (w_);
		627
		628	if (expect_false (w_->pending))
		629	pendings [pri][w_->pending - 1].events |= revents;
		630	else
		631	{
		632	w_->pending = ++pendingcnt [pri];
		633	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		634	pendings [pri][w_->pending - 1].w = w_;
		635	pendings [pri][w_->pending - 1].events = revents;
		636	}
		637	}
		638
		639	void inline_speed
		640	queue_events (EV_P_ W *events, int eventcnt, int type)
		641	{
		642	int i;
		643
		644	for (i = 0; i < eventcnt; ++i)
		645	ev_feed_event (EV_A_ events [i], type);
		646	}
		647
		648	/*****************************************************************************/
		649
		650	void inline_size
189	anfds_init (ANFD *base, int count)	651	anfds_init (ANFD *base, int count)
190	{	652	{
191	while (count--)	653	while (count--)
192	{	654	{
193	base->head = 0;	655	base->head = 0;
…		…
196		658
197	++base;	659	++base;
198	}	660	}
199	}	661	}
200		662
201	typedef struct	663	void inline_speed
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void
211	event (W w, int events)
212	{
213	if (w->pending)
214	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
216	return;
217	}
218
219	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}
224
225	static void
226	queue_events (W *events, int eventcnt, int type)
227	{
228	int i;
229
230	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);
232	}
233
234	static void
235	fd_event (int fd, int events)	664	fd_event (EV_P_ int fd, int revents)
236	{	665	{
237	ANFD *anfd = anfds + fd;	666	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	667	ev_io *w;
239		668
240	for (w = anfd->head; w; w = w->next)	669	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241	{	670	{
242	int ev = w->events & events;	671	int ev = w->events & revents;
243		672
244	if (ev)	673	if (ev)
245	event ((W)w, ev);	674	ev_feed_event (EV_A_ (W)w, ev);
246	}	675	}
247	}	676	}
248		677
249	/*****************************************************************************/	678	void
		679	ev_feed_fd_event (EV_P_ int fd, int revents)
		680	{
		681	if (fd >= 0 && fd < anfdmax)
		682	fd_event (EV_A_ fd, revents);
		683	}
250		684
251	static int *fdchanges;	685	void inline_size
252	static int fdchangemax, fdchangecnt;	686	fd_reify (EV_P)
253
254	static void
255	fd_reify (void)
256	{	687	{
257	int i;	688	int i;
258		689
259	for (i = 0; i < fdchangecnt; ++i)	690	for (i = 0; i < fdchangecnt; ++i)
260	{	691	{
261	int fd = fdchanges [i];	692	int fd = fdchanges [i];
262	ANFD *anfd = anfds + fd;	693	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	694	ev_io *w;
264		695
265	int events = 0;	696	unsigned char events = 0;
266		697
267	for (w = anfd->head; w; w = w->next)	698	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268	events |= w->events;	699	events |= (unsigned char)w->events;
269		700
270	anfd->reify = 0;	701	#if EV_SELECT_IS_WINSOCKET
271		702	if (events)
272	if (anfd->events != events)
273	{	703	{
274	method_modify (fd, anfd->events, events);	704	unsigned long argp;
275	anfd->events = events;	705	#ifdef EV_FD_TO_WIN32_HANDLE
		706	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		707	#else
		708	anfd->handle = _get_osfhandle (fd);
		709	#endif
		710	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
276	}	711	}
		712	#endif
		713
		714	{
		715	unsigned char o_events = anfd->events;
		716	unsigned char o_reify = anfd->reify;
		717
		718	anfd->reify = 0;
		719	anfd->events = events;
		720
		721	if (o_events != events || o_reify & EV_IOFDSET)
		722	backend_modify (EV_A_ fd, o_events, events);
		723	}
277	}	724	}
278		725
279	fdchangecnt = 0;	726	fdchangecnt = 0;
280	}	727	}
281		728
282	static void	729	void inline_size
283	fd_change (int fd)	730	fd_change (EV_P_ int fd, int flags)
284	{	731	{
285	if (anfds [fd].reify || fdchangecnt < 0)	732	unsigned char reify = anfds [fd].reify;
286	return;
287
288	anfds [fd].reify = 1;	733	anfds [fd].reify |= flags;
289		734
		735	if (expect_true (!reify))
		736	{
290	++fdchangecnt;	737	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	738	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292	fdchanges [fdchangecnt - 1] = fd;	739	fdchanges [fdchangecnt - 1] = fd;
		740	}
293	}	741	}
294		742
295	static void	743	void inline_speed
296	fd_kill (int fd)	744	fd_kill (EV_P_ int fd)
297	{	745	{
298	struct ev_io *w;	746	ev_io *w;
299		747
300	printf ("killing fd %d\n", fd);//D
301	while ((w = anfds [fd].head))	748	while ((w = (ev_io *)anfds [fd].head))
302	{	749	{
303	ev_io_stop (w);	750	ev_io_stop (EV_A_ w);
304	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	751	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305	}	752	}
		753	}
		754
		755	int inline_size
		756	fd_valid (int fd)
		757	{
		758	#ifdef _WIN32
		759	return _get_osfhandle (fd) != -1;
		760	#else
		761	return fcntl (fd, F_GETFD) != -1;
		762	#endif
306	}	763	}
307		764
308	/* called on EBADF to verify fds */	765	/* called on EBADF to verify fds */
309	static void	766	static void noinline
310	fd_ebadf (void)	767	fd_ebadf (EV_P)
311	{	768	{
312	int fd;	769	int fd;
313		770
314	for (fd = 0; fd < anfdmax; ++fd)	771	for (fd = 0; fd < anfdmax; ++fd)
315	if (anfds [fd].events)	772	if (anfds [fd].events)
316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	773	if (!fd_valid (fd) == -1 && errno == EBADF)
317	fd_kill (fd);	774	fd_kill (EV_A_ fd);
318	}	775	}
319		776
320	/* called on ENOMEM in select/poll to kill some fds and retry */	777	/* called on ENOMEM in select/poll to kill some fds and retry */
321	static void	778	static void noinline
322	fd_enomem (void)	779	fd_enomem (EV_P)
323	{	780	{
324	int fd = anfdmax;	781	int fd;
325		782
326	while (fd--)	783	for (fd = anfdmax; fd--; )
327	if (anfds [fd].events)	784	if (anfds [fd].events)
328	{	785	{
329	close (fd);
330	fd_kill (fd);	786	fd_kill (EV_A_ fd);
331	return;	787	return;
332	}	788	}
333	}	789	}
334		790
		791	/* usually called after fork if backend needs to re-arm all fds from scratch */
		792	static void noinline
		793	fd_rearm_all (EV_P)
		794	{
		795	int fd;
		796
		797	for (fd = 0; fd < anfdmax; ++fd)
		798	if (anfds [fd].events)
		799	{
		800	anfds [fd].events = 0;
		801	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		802	}
		803	}
		804
335	/*****************************************************************************/	805	/*****************************************************************************/
336		806
337	static struct ev_timer **timers;	807	/*
338	static int timermax, timercnt;	808	* the heap functions want a real array index. array index 0 uis guaranteed to not
		809	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		810	* the branching factor of the d-tree.
		811	*/
339		812
340	static struct ev_periodic **periodics;	813	/*
341	static int periodicmax, periodiccnt;	814	* at the moment we allow libev the luxury of two heaps,
		815	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		816	* which is more cache-efficient.
		817	* the difference is about 5% with 50000+ watchers.
		818	*/
		819	#if EV_USE_4HEAP
342		820
343	static void	821	#define DHEAP 4
344	upheap (WT *timers, int k)	822	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
345	{	823	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
346	WT w = timers [k];	824	#define UPHEAP_DONE(p,k) ((p) == (k))
347		825
348	while (k && timers [k >> 1]->at > w->at)	826	/* away from the root */
349	{	827	void inline_speed
350	timers [k] = timers [k >> 1];
351	timers [k]->active = k + 1;
352	k >>= 1;
353	}
354
355	timers [k] = w;
356	timers [k]->active = k + 1;
357
358	}
359
360	static void
361	downheap (WT *timers, int N, int k)	828	downheap (ANHE *heap, int N, int k)
362	{	829	{
363	WT w = timers [k];	830	ANHE he = heap [k];
		831	ANHE *E = heap + N + HEAP0;
364		832
365	while (k < (N >> 1))	833	for (;;)
366	{	834	{
367	int j = k << 1;	835	ev_tstamp minat;
		836	ANHE *minpos;
		837	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
368		838
369	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	839	/* find minimum child */
		840	if (expect_true (pos + DHEAP - 1 < E))
370	++j;	841	{
371		842	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
372	if (w->at <= timers [j]->at)	843	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		844	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		845	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		846	}
		847	else if (pos < E)
		848	{
		849	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		850	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		851	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		852	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		853	}
		854	else
373	break;	855	break;
374		856
375	timers [k] = timers [j];	857	if (ANHE_at (he) <= minat)
376	timers [k]->active = k + 1;	858	break;
		859
		860	heap [k] = *minpos;
		861	ev_active (ANHE_w (*minpos)) = k;
		862
		863	k = minpos - heap;
		864	}
		865
		866	heap [k] = he;
		867	ev_active (ANHE_w (he)) = k;
		868	}
		869
		870	#else /* 4HEAP */
		871
		872	#define HEAP0 1
		873	#define HPARENT(k) ((k) >> 1)
		874	#define UPHEAP_DONE(p,k) (!(p))
		875
		876	/* away from the root */
		877	void inline_speed
		878	downheap (ANHE *heap, int N, int k)
		879	{
		880	ANHE he = heap [k];
		881
		882	for (;;)
		883	{
		884	int c = k << 1;
		885
		886	if (c > N + HEAP0 - 1)
		887	break;
		888
		889	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		890	? 1 : 0;
		891
		892	if (ANHE_at (he) <= ANHE_at (heap [c]))
		893	break;
		894
		895	heap [k] = heap [c];
		896	ev_active (ANHE_w (heap [k])) = k;
		897
377	k = j;	898	k = c;
		899	}
		900
		901	heap [k] = he;
		902	ev_active (ANHE_w (he)) = k;
		903	}
		904	#endif
		905
		906	/* towards the root */
		907	void inline_speed
		908	upheap (ANHE *heap, int k)
		909	{
		910	ANHE he = heap [k];
		911
		912	for (;;)
378	}	913	{
		914	int p = HPARENT (k);
379		915
380	timers [k] = w;	916	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
381	timers [k]->active = k + 1;	917	break;
		918
		919	heap [k] = heap [p];
		920	ev_active (ANHE_w (heap [k])) = k;
		921	k = p;
		922	}
		923
		924	heap [k] = he;
		925	ev_active (ANHE_w (he)) = k;
		926	}
		927
		928	void inline_size
		929	adjustheap (ANHE *heap, int N, int k)
		930	{
		931	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
		932	upheap (heap, k);
		933	else
		934	downheap (heap, N, k);
		935	}
		936
		937	/* rebuild the heap: this function is used only once and executed rarely */
		938	void inline_size
		939	reheap (ANHE *heap, int N)
		940	{
		941	int i;
		942
		943	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		944	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		945	for (i = 0; i < N; ++i)
		946	upheap (heap, i + HEAP0);
382	}	947	}
383		948
384	/*****************************************************************************/	949	/*****************************************************************************/
385		950
386	typedef struct	951	typedef struct
387	{	952	{
388	struct ev_signal *head;	953	WL head;
389	sig_atomic_t volatile gotsig;	954	EV_ATOMIC_T gotsig;
390	} ANSIG;	955	} ANSIG;
391		956
392	static ANSIG *signals;	957	static ANSIG *signals;
393	static int signalmax;	958	static int signalmax;
394		959
395	static int sigpipe [2];	960	static EV_ATOMIC_T gotsig;
396	static sig_atomic_t volatile gotsig;
397	static struct ev_io sigev;
398		961
399	static void	962	void inline_size
400	signals_init (ANSIG *base, int count)	963	signals_init (ANSIG *base, int count)
401	{	964	{
402	while (count--)	965	while (count--)
403	{	966	{
404	base->head = 0;	967	base->head = 0;
…		…
406		969
407	++base;	970	++base;
408	}	971	}
409	}	972	}
410		973
		974	/*****************************************************************************/
		975
		976	void inline_speed
		977	fd_intern (int fd)
		978	{
		979	#ifdef _WIN32
		980	int arg = 1;
		981	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		982	#else
		983	fcntl (fd, F_SETFD, FD_CLOEXEC);
		984	fcntl (fd, F_SETFL, O_NONBLOCK);
		985	#endif
		986	}
		987
		988	static void noinline
		989	evpipe_init (EV_P)
		990	{
		991	if (!ev_is_active (&pipeev))
		992	{
		993	#if EV_USE_EVENTFD
		994	if ((evfd = eventfd (0, 0)) >= 0)
		995	{
		996	evpipe [0] = -1;
		997	fd_intern (evfd);
		998	ev_io_set (&pipeev, evfd, EV_READ);
		999	}
		1000	else
		1001	#endif
		1002	{
		1003	while (pipe (evpipe))
		1004	syserr ("(libev) error creating signal/async pipe");
		1005
		1006	fd_intern (evpipe [0]);
		1007	fd_intern (evpipe [1]);
		1008	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1009	}
		1010
		1011	ev_io_start (EV_A_ &pipeev);
		1012	ev_unref (EV_A); /* watcher should not keep loop alive */
		1013	}
		1014	}
		1015
		1016	void inline_size
		1017	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1018	{
		1019	if (!*flag)
		1020	{
		1021	int old_errno = errno; /* save errno because write might clobber it */
		1022
		1023	*flag = 1;
		1024
		1025	#if EV_USE_EVENTFD
		1026	if (evfd >= 0)
		1027	{
		1028	uint64_t counter = 1;
		1029	write (evfd, &counter, sizeof (uint64_t));
		1030	}
		1031	else
		1032	#endif
		1033	write (evpipe [1], &old_errno, 1);
		1034
		1035	errno = old_errno;
		1036	}
		1037	}
		1038
411	static void	1039	static void
		1040	pipecb (EV_P_ ev_io *iow, int revents)
		1041	{
		1042	#if EV_USE_EVENTFD
		1043	if (evfd >= 0)
		1044	{
		1045	uint64_t counter;
		1046	read (evfd, &counter, sizeof (uint64_t));
		1047	}
		1048	else
		1049	#endif
		1050	{
		1051	char dummy;
		1052	read (evpipe [0], &dummy, 1);
		1053	}
		1054
		1055	if (gotsig && ev_is_default_loop (EV_A))
		1056	{
		1057	int signum;
		1058	gotsig = 0;
		1059
		1060	for (signum = signalmax; signum--; )
		1061	if (signals [signum].gotsig)
		1062	ev_feed_signal_event (EV_A_ signum + 1);
		1063	}
		1064
		1065	#if EV_ASYNC_ENABLE
		1066	if (gotasync)
		1067	{
		1068	int i;
		1069	gotasync = 0;
		1070
		1071	for (i = asynccnt; i--; )
		1072	if (asyncs [i]->sent)
		1073	{
		1074	asyncs [i]->sent = 0;
		1075	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1076	}
		1077	}
		1078	#endif
		1079	}
		1080
		1081	/*****************************************************************************/
		1082
		1083	static void
412	sighandler (int signum)	1084	ev_sighandler (int signum)
413	{	1085	{
		1086	#if EV_MULTIPLICITY
		1087	struct ev_loop *loop = &default_loop_struct;
		1088	#endif
		1089
		1090	#if _WIN32
		1091	signal (signum, ev_sighandler);
		1092	#endif
		1093
414	signals [signum - 1].gotsig = 1;	1094	signals [signum - 1].gotsig = 1;
415		1095	evpipe_write (EV_A_ &gotsig);
416	if (!gotsig)
417	{
418	gotsig = 1;
419	write (sigpipe [1], &signum, 1);
420	}
421	}	1096	}
422		1097
423	static void	1098	void noinline
424	sigcb (struct ev_io *iow, int revents)	1099	ev_feed_signal_event (EV_P_ int signum)
425	{	1100	{
426	struct ev_signal *w;	1101	WL w;
		1102
		1103	#if EV_MULTIPLICITY
		1104	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1105	#endif
		1106
427	int signum;	1107	--signum;
428		1108
429	read (sigpipe [0], &revents, 1);	1109	if (signum < 0 || signum >= signalmax)
430	gotsig = 0;	1110	return;
431		1111
432	for (signum = signalmax; signum--; )
433	if (signals [signum].gotsig)
434	{
435	signals [signum].gotsig = 0;	1112	signals [signum].gotsig = 0;
436		1113
437	for (w = signals [signum].head; w; w = w->next)	1114	for (w = signals [signum].head; w; w = w->next)
438	event ((W)w, EV_SIGNAL);	1115	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
439	}
440	}
441
442	static void
443	siginit (void)
444	{
445	#ifndef WIN32
446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448
449	/* rather than sort out wether we really need nb, set it */
450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452	#endif
453
454	ev_io_set (&sigev, sigpipe [0], EV_READ);
455	ev_io_start (&sigev);
456	}	1116	}
457		1117
458	/*****************************************************************************/	1118	/*****************************************************************************/
459		1119
460	static struct ev_idle **idles;	1120	static WL childs [EV_PID_HASHSIZE];
461	static int idlemax, idlecnt;
462		1121
463	static struct ev_prepare **prepares;
464	static int preparemax, preparecnt;
465
466	static struct ev_check **checks;
467	static int checkmax, checkcnt;
468
469	/*****************************************************************************/
470
471	static struct ev_child *childs [PID_HASHSIZE];
472	static struct ev_signal childev;
473
474	#ifndef WIN32	1122	#ifndef _WIN32
		1123
		1124	static ev_signal childev;
		1125
		1126	#ifndef WIFCONTINUED
		1127	# define WIFCONTINUED(status) 0
		1128	#endif
		1129
		1130	void inline_speed
		1131	child_reap (EV_P_ int chain, int pid, int status)
		1132	{
		1133	ev_child *w;
		1134	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1135
		1136	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1137	{
		1138	if ((w->pid == pid || !w->pid)
		1139	&& (!traced || (w->flags & 1)))
		1140	{
		1141	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1142	w->rpid = pid;
		1143	w->rstatus = status;
		1144	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1145	}
		1146	}
		1147	}
475		1148
476	#ifndef WCONTINUED	1149	#ifndef WCONTINUED
477	# define WCONTINUED 0	1150	# define WCONTINUED 0
478	#endif	1151	#endif
479		1152
480	static void	1153	static void
481	child_reap (struct ev_signal *sw, int chain, int pid, int status)
482	{
483	struct ev_child *w;
484
485	for (w = childs [chain & (PID_HASHSIZE - 1)]; w; w = w->next)
486	if (w->pid == pid || !w->pid)
487	{
488	w->priority = sw->priority; /* need to do it *now* */
489	w->rpid = pid;
490	w->rstatus = status;
491	printf ("rpid %p %d %d\n", w, pid, w->pid);//D
492	event ((W)w, EV_CHILD);
493	}
494	}
495
496	static void
497	childcb (struct ev_signal *sw, int revents)	1154	childcb (EV_P_ ev_signal *sw, int revents)
498	{	1155	{
499	int pid, status;	1156	int pid, status;
500		1157
501	printf ("chld %x\n", revents);//D	1158	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
502	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1159	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
503	{	1160	if (!WCONTINUED
		1161	|| errno != EINVAL
		1162	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1163	return;
		1164
504	/* make sure we are called again until all childs have been reaped */	1165	/* make sure we are called again until all children have been reaped */
		1166	/* we need to do it this way so that the callback gets called before we continue */
505	event ((W)sw, EV_SIGNAL);	1167	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
506		1168
507	child_reap (sw, pid, pid, status);	1169	child_reap (EV_A_ pid, pid, status);
		1170	if (EV_PID_HASHSIZE > 1)
508	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1171	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
509	}
510	}	1172	}
511		1173
512	#endif	1174	#endif
513		1175
514	/*****************************************************************************/	1176	/*****************************************************************************/
515		1177
		1178	#if EV_USE_PORT
		1179	# include "ev_port.c"
		1180	#endif
516	#if EV_USE_KQUEUE	1181	#if EV_USE_KQUEUE
517	# include "ev_kqueue.c"	1182	# include "ev_kqueue.c"
518	#endif	1183	#endif
519	#if EV_USE_EPOLL	1184	#if EV_USE_EPOLL
520	# include "ev_epoll.c"	1185	# include "ev_epoll.c"
…		…
536	ev_version_minor (void)	1201	ev_version_minor (void)
537	{	1202	{
538	return EV_VERSION_MINOR;	1203	return EV_VERSION_MINOR;
539	}	1204	}
540		1205
541	/* return true if we are running with elevated privileges and ignore env variables */	1206	/* return true if we are running with elevated privileges and should ignore env variables */
542	static int	1207	int inline_size
543	enable_secure ()	1208	enable_secure (void)
544	{	1209	{
		1210	#ifdef _WIN32
		1211	return 0;
		1212	#else
545	return getuid () != geteuid ()	1213	return getuid () != geteuid ()
546	|| getgid () != getegid ();	1214	|| getgid () != getegid ();
		1215	#endif
547	}	1216	}
548		1217
549	int ev_init (int methods)	1218	unsigned int
		1219	ev_supported_backends (void)
550	{	1220	{
551	if (!ev_method)	1221	unsigned int flags = 0;
		1222
		1223	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1224	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1225	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1226	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1227	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1228
		1229	return flags;
		1230	}
		1231
		1232	unsigned int
		1233	ev_recommended_backends (void)
		1234	{
		1235	unsigned int flags = ev_supported_backends ();
		1236
		1237	#ifndef __NetBSD__
		1238	/* kqueue is borked on everything but netbsd apparently */
		1239	/* it usually doesn't work correctly on anything but sockets and pipes */
		1240	flags &= ~EVBACKEND_KQUEUE;
		1241	#endif
		1242	#ifdef __APPLE__
		1243	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1244	flags &= ~EVBACKEND_POLL;
		1245	#endif
		1246
		1247	return flags;
		1248	}
		1249
		1250	unsigned int
		1251	ev_embeddable_backends (void)
		1252	{
		1253	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1254
		1255	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1256	/* please fix it and tell me how to detect the fix */
		1257	flags &= ~EVBACKEND_EPOLL;
		1258
		1259	return flags;
		1260	}
		1261
		1262	unsigned int
		1263	ev_backend (EV_P)
		1264	{
		1265	return backend;
		1266	}
		1267
		1268	unsigned int
		1269	ev_loop_count (EV_P)
		1270	{
		1271	return loop_count;
		1272	}
		1273
		1274	void
		1275	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1276	{
		1277	io_blocktime = interval;
		1278	}
		1279
		1280	void
		1281	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1282	{
		1283	timeout_blocktime = interval;
		1284	}
		1285
		1286	static void noinline
		1287	loop_init (EV_P_ unsigned int flags)
		1288	{
		1289	if (!backend)
552	{	1290	{
553	#if EV_USE_MONOTONIC	1291	#if EV_USE_MONOTONIC
554	{	1292	{
555	struct timespec ts;	1293	struct timespec ts;
556	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1294	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
557	have_monotonic = 1;	1295	have_monotonic = 1;
558	}	1296	}
559	#endif	1297	#endif
560		1298
561	ev_now = ev_time ();	1299	ev_rt_now = ev_time ();
562	now = get_clock ();	1300	mn_now = get_clock ();
563	now_floor = now;	1301	now_floor = mn_now;
564	diff = ev_now - now;	1302	rtmn_diff = ev_rt_now - mn_now;
565		1303
566	if (pipe (sigpipe))	1304	io_blocktime = 0.;
567	return 0;	1305	timeout_blocktime = 0.;
		1306	backend = 0;
		1307	backend_fd = -1;
		1308	gotasync = 0;
		1309	#if EV_USE_INOTIFY
		1310	fs_fd = -2;
		1311	#endif
568		1312
569	if (methods == EVMETHOD_AUTO)	1313	/* pid check not overridable via env */
570	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1314	#ifndef _WIN32
		1315	if (flags & EVFLAG_FORKCHECK)
		1316	curpid = getpid ();
		1317	#endif
		1318
		1319	if (!(flags & EVFLAG_NOENV)
		1320	&& !enable_secure ()
		1321	&& getenv ("LIBEV_FLAGS"))
571	methods = atoi (getenv ("LIBEV_METHODS"));	1322	flags = atoi (getenv ("LIBEV_FLAGS"));
572	else
573	methods = EVMETHOD_ANY;
574		1323
575	ev_method = 0;	1324	if (!(flags & 0x0000ffffU))
		1325	flags |= ev_recommended_backends ();
		1326
		1327	#if EV_USE_PORT
		1328	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1329	#endif
576	#if EV_USE_KQUEUE	1330	#if EV_USE_KQUEUE
577	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	1331	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
578	#endif	1332	#endif
579	#if EV_USE_EPOLL	1333	#if EV_USE_EPOLL
580	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	1334	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
581	#endif	1335	#endif
582	#if EV_USE_POLL	1336	#if EV_USE_POLL
583	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	1337	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
584	#endif	1338	#endif
585	#if EV_USE_SELECT	1339	#if EV_USE_SELECT
586	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	1340	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
587	#endif	1341	#endif
588		1342
589	if (ev_method)	1343	ev_init (&pipeev, pipecb);
		1344	ev_set_priority (&pipeev, EV_MAXPRI);
		1345	}
		1346	}
		1347
		1348	static void noinline
		1349	loop_destroy (EV_P)
		1350	{
		1351	int i;
		1352
		1353	if (ev_is_active (&pipeev))
		1354	{
		1355	ev_ref (EV_A); /* signal watcher */
		1356	ev_io_stop (EV_A_ &pipeev);
		1357
		1358	#if EV_USE_EVENTFD
		1359	if (evfd >= 0)
		1360	close (evfd);
		1361	#endif
		1362
		1363	if (evpipe [0] >= 0)
590	{	1364	{
591	ev_watcher_init (&sigev, sigcb);	1365	close (evpipe [0]);
592	ev_set_priority (&sigev, EV_MAXPRI);	1366	close (evpipe [1]);
593	siginit ();	1367	}
		1368	}
594		1369
		1370	#if EV_USE_INOTIFY
		1371	if (fs_fd >= 0)
		1372	close (fs_fd);
		1373	#endif
		1374
		1375	if (backend_fd >= 0)
		1376	close (backend_fd);
		1377
		1378	#if EV_USE_PORT
		1379	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1380	#endif
		1381	#if EV_USE_KQUEUE
		1382	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1383	#endif
		1384	#if EV_USE_EPOLL
		1385	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1386	#endif
		1387	#if EV_USE_POLL
		1388	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1389	#endif
		1390	#if EV_USE_SELECT
		1391	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1392	#endif
		1393
		1394	for (i = NUMPRI; i--; )
		1395	{
		1396	array_free (pending, [i]);
		1397	#if EV_IDLE_ENABLE
		1398	array_free (idle, [i]);
		1399	#endif
		1400	}
		1401
		1402	ev_free (anfds); anfdmax = 0;
		1403
		1404	/* have to use the microsoft-never-gets-it-right macro */
		1405	array_free (fdchange, EMPTY);
		1406	array_free (timer, EMPTY);
		1407	#if EV_PERIODIC_ENABLE
		1408	array_free (periodic, EMPTY);
		1409	#endif
		1410	#if EV_FORK_ENABLE
		1411	array_free (fork, EMPTY);
		1412	#endif
		1413	array_free (prepare, EMPTY);
		1414	array_free (check, EMPTY);
		1415	#if EV_ASYNC_ENABLE
		1416	array_free (async, EMPTY);
		1417	#endif
		1418
		1419	backend = 0;
		1420	}
		1421
		1422	#if EV_USE_INOTIFY
		1423	void inline_size infy_fork (EV_P);
		1424	#endif
		1425
		1426	void inline_size
		1427	loop_fork (EV_P)
		1428	{
		1429	#if EV_USE_PORT
		1430	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1431	#endif
		1432	#if EV_USE_KQUEUE
		1433	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1434	#endif
		1435	#if EV_USE_EPOLL
		1436	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1437	#endif
		1438	#if EV_USE_INOTIFY
		1439	infy_fork (EV_A);
		1440	#endif
		1441
		1442	if (ev_is_active (&pipeev))
		1443	{
		1444	/* this "locks" the handlers against writing to the pipe */
		1445	/* while we modify the fd vars */
		1446	gotsig = 1;
		1447	#if EV_ASYNC_ENABLE
		1448	gotasync = 1;
		1449	#endif
		1450
		1451	ev_ref (EV_A);
		1452	ev_io_stop (EV_A_ &pipeev);
		1453
		1454	#if EV_USE_EVENTFD
		1455	if (evfd >= 0)
		1456	close (evfd);
		1457	#endif
		1458
		1459	if (evpipe [0] >= 0)
		1460	{
		1461	close (evpipe [0]);
		1462	close (evpipe [1]);
		1463	}
		1464
		1465	evpipe_init (EV_A);
		1466	/* now iterate over everything, in case we missed something */
		1467	pipecb (EV_A_ &pipeev, EV_READ);
		1468	}
		1469
		1470	postfork = 0;
		1471	}
		1472
		1473	#if EV_MULTIPLICITY
		1474
		1475	struct ev_loop *
		1476	ev_loop_new (unsigned int flags)
		1477	{
		1478	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1479
		1480	memset (loop, 0, sizeof (struct ev_loop));
		1481
		1482	loop_init (EV_A_ flags);
		1483
		1484	if (ev_backend (EV_A))
		1485	return loop;
		1486
		1487	return 0;
		1488	}
		1489
		1490	void
		1491	ev_loop_destroy (EV_P)
		1492	{
		1493	loop_destroy (EV_A);
		1494	ev_free (loop);
		1495	}
		1496
		1497	void
		1498	ev_loop_fork (EV_P)
		1499	{
		1500	postfork = 1; /* must be in line with ev_default_fork */
		1501	}
		1502
		1503	#if EV_VERIFY
		1504	void noinline
		1505	verify_watcher (EV_P_ W w)
		1506	{
		1507	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1508
		1509	if (w->pending)
		1510	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1511	}
		1512
		1513	static void noinline
		1514	verify_heap (EV_P_ ANHE *heap, int N)
		1515	{
		1516	int i;
		1517
		1518	for (i = HEAP0; i < N + HEAP0; ++i)
		1519	{
		1520	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1521	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1522	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1523
		1524	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1525	}
		1526	}
		1527
		1528	static void noinline
		1529	array_verify (EV_P_ W *ws, int cnt)
		1530	{
		1531	while (cnt--)
		1532	{
		1533	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1534	verify_watcher (EV_A_ ws [cnt]);
		1535	}
		1536	}
		1537	#endif
		1538
		1539	void
		1540	ev_loop_verify (EV_P)
		1541	{
		1542	#if EV_VERIFY
		1543	int i;
		1544	WL w;
		1545
		1546	assert (activecnt >= -1);
		1547
		1548	assert (fdchangemax >= fdchangecnt);
		1549	for (i = 0; i < fdchangecnt; ++i)
		1550	assert (("negative fd in fdchanges", fdchanges [i] >= 0));
		1551
		1552	assert (anfdmax >= 0);
		1553	for (i = 0; i < anfdmax; ++i)
		1554	for (w = anfds [i].head; w; w = w->next)
		1555	{
		1556	verify_watcher (EV_A_ (W)w);
		1557	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
		1558	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1559	}
		1560
		1561	assert (timermax >= timercnt);
		1562	verify_heap (EV_A_ timers, timercnt);
		1563
		1564	#if EV_PERIODIC_ENABLE
		1565	assert (periodicmax >= periodiccnt);
		1566	verify_heap (EV_A_ periodics, periodiccnt);
		1567	#endif
		1568
		1569	for (i = NUMPRI; i--; )
		1570	{
		1571	assert (pendingmax [i] >= pendingcnt [i]);
		1572	#if EV_IDLE_ENABLE
		1573	assert (idlemax [i] >= idlecnt [i]);
		1574	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1575	#endif
		1576	}
		1577
		1578	#if EV_FORK_ENABLE
		1579	assert (forkmax >= forkcnt);
		1580	array_verify (EV_A_ (W *)forks, forkcnt);
		1581	#endif
		1582
		1583	#if EV_ASYNC_ENABLE
		1584	assert (asyncmax >= asynccnt);
		1585	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1586	#endif
		1587
		1588	assert (preparemax >= preparecnt);
		1589	array_verify (EV_A_ (W *)prepares, preparecnt);
		1590
		1591	assert (checkmax >= checkcnt);
		1592	array_verify (EV_A_ (W *)checks, checkcnt);
		1593
		1594	# if 0
		1595	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1596	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
		1597	# endif
		1598	#endif
		1599	}
		1600
		1601	#endif /* multiplicity */
		1602
		1603	#if EV_MULTIPLICITY
		1604	struct ev_loop *
		1605	ev_default_loop_init (unsigned int flags)
		1606	#else
		1607	int
		1608	ev_default_loop (unsigned int flags)
		1609	#endif
		1610	{
		1611	if (!ev_default_loop_ptr)
		1612	{
		1613	#if EV_MULTIPLICITY
		1614	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1615	#else
		1616	ev_default_loop_ptr = 1;
		1617	#endif
		1618
		1619	loop_init (EV_A_ flags);
		1620
		1621	if (ev_backend (EV_A))
		1622	{
595	#ifndef WIN32	1623	#ifndef _WIN32
596	ev_signal_init (&childev, childcb, SIGCHLD);	1624	ev_signal_init (&childev, childcb, SIGCHLD);
597	ev_set_priority (&childev, EV_MAXPRI);	1625	ev_set_priority (&childev, EV_MAXPRI);
598	ev_signal_start (&childev);	1626	ev_signal_start (EV_A_ &childev);
		1627	ev_unref (EV_A); /* child watcher should not keep loop alive */
599	#endif	1628	#endif
600	}	1629	}
		1630	else
		1631	ev_default_loop_ptr = 0;
601	}	1632	}
602		1633
603	return ev_method;	1634	return ev_default_loop_ptr;
		1635	}
		1636
		1637	void
		1638	ev_default_destroy (void)
		1639	{
		1640	#if EV_MULTIPLICITY
		1641	struct ev_loop *loop = ev_default_loop_ptr;
		1642	#endif
		1643
		1644	#ifndef _WIN32
		1645	ev_ref (EV_A); /* child watcher */
		1646	ev_signal_stop (EV_A_ &childev);
		1647	#endif
		1648
		1649	loop_destroy (EV_A);
		1650	}
		1651
		1652	void
		1653	ev_default_fork (void)
		1654	{
		1655	#if EV_MULTIPLICITY
		1656	struct ev_loop *loop = ev_default_loop_ptr;
		1657	#endif
		1658
		1659	if (backend)
		1660	postfork = 1; /* must be in line with ev_loop_fork */
604	}	1661	}
605		1662
606	/*****************************************************************************/	1663	/*****************************************************************************/
607		1664
608	void	1665	void
609	ev_fork_prepare (void)	1666	ev_invoke (EV_P_ void *w, int revents)
610	{	1667	{
611	/* nop */	1668	EV_CB_INVOKE ((W)w, revents);
612	}	1669	}
613		1670
614	void	1671	void inline_speed
615	ev_fork_parent (void)
616	{
617	/* nop */
618	}
619
620	void
621	ev_fork_child (void)
622	{
623	#if EV_USE_EPOLL
624	if (ev_method == EVMETHOD_EPOLL)
625	epoll_postfork_child ();
626	#endif
627
628	ev_io_stop (&sigev);
629	close (sigpipe [0]);
630	close (sigpipe [1]);
631	pipe (sigpipe);
632	siginit ();
633	}
634
635	/*****************************************************************************/
636
637	static void
638	call_pending (void)	1672	call_pending (EV_P)
639	{	1673	{
640	int pri;	1674	int pri;
641		1675
642	for (pri = NUMPRI; pri--; )	1676	for (pri = NUMPRI; pri--; )
643	while (pendingcnt [pri])	1677	while (pendingcnt [pri])
644	{	1678	{
645	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1679	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
646		1680
647	if (p->w)	1681	if (expect_true (p->w))
648	{	1682	{
		1683	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1684
649	p->w->pending = 0;	1685	p->w->pending = 0;
650	p->w->cb (p->w, p->events);	1686	EV_CB_INVOKE (p->w, p->events);
		1687	EV_FREQUENT_CHECK;
651	}	1688	}
652	}	1689	}
653	}	1690	}
654		1691
655	static void	1692	#if EV_IDLE_ENABLE
656	timers_reify (void)	1693	void inline_size
		1694	idle_reify (EV_P)
657	{	1695	{
658	while (timercnt && timers [0]->at <= now)	1696	if (expect_false (idleall))
		1697	{
		1698	int pri;
		1699
		1700	for (pri = NUMPRI; pri--; )
		1701	{
		1702	if (pendingcnt [pri])
		1703	break;
		1704
		1705	if (idlecnt [pri])
		1706	{
		1707	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1708	break;
		1709	}
		1710	}
659	{	1711	}
660	struct ev_timer *w = timers [0];	1712	}
		1713	#endif
		1714
		1715	void inline_size
		1716	timers_reify (EV_P)
		1717	{
		1718	EV_FREQUENT_CHECK;
		1719
		1720	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		1721	{
		1722	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1723
		1724	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
661		1725
662	/* first reschedule or stop timer */	1726	/* first reschedule or stop timer */
663	if (w->repeat)	1727	if (w->repeat)
664	{	1728	{
		1729	ev_at (w) += w->repeat;
		1730	if (ev_at (w) < mn_now)
		1731	ev_at (w) = mn_now;
		1732
665	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1733	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
666	w->at = now + w->repeat;	1734
		1735	ANHE_at_cache (timers [HEAP0]);
667	downheap ((WT *)timers, timercnt, 0);	1736	downheap (timers, timercnt, HEAP0);
668	}	1737	}
669	else	1738	else
670	ev_timer_stop (w); /* nonrepeating: stop timer */	1739	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
671		1740
		1741	EV_FREQUENT_CHECK;
672	event ((W)w, EV_TIMEOUT);	1742	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
673	}	1743	}
674	}	1744	}
675		1745
676	static void	1746	#if EV_PERIODIC_ENABLE
		1747	void inline_size
677	periodics_reify (void)	1748	periodics_reify (EV_P)
678	{	1749	{
		1750	EV_FREQUENT_CHECK;
		1751
679	while (periodiccnt && periodics [0]->at <= ev_now)	1752	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
680	{	1753	{
681	struct ev_periodic *w = periodics [0];	1754	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1755
		1756	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
682		1757
683	/* first reschedule or stop timer */	1758	/* first reschedule or stop timer */
684	if (w->interval)	1759	if (w->reschedule_cb)
685	{	1760	{
686	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1761	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
687	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1762
		1763	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1764
		1765	ANHE_at_cache (periodics [HEAP0]);
688	downheap ((WT *)periodics, periodiccnt, 0);	1766	downheap (periodics, periodiccnt, HEAP0);
		1767	}
		1768	else if (w->interval)
		1769	{
		1770	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1771	/* if next trigger time is not sufficiently in the future, put it there */
		1772	/* this might happen because of floating point inexactness */
		1773	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1774	{
		1775	ev_at (w) += w->interval;
		1776
		1777	/* if interval is unreasonably low we might still have a time in the past */
		1778	/* so correct this. this will make the periodic very inexact, but the user */
		1779	/* has effectively asked to get triggered more often than possible */
		1780	if (ev_at (w) < ev_rt_now)
		1781	ev_at (w) = ev_rt_now;
		1782	}
		1783
		1784	ANHE_at_cache (periodics [HEAP0]);
		1785	downheap (periodics, periodiccnt, HEAP0);
689	}	1786	}
690	else	1787	else
691	ev_periodic_stop (w); /* nonrepeating: stop timer */	1788	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
692		1789
		1790	EV_FREQUENT_CHECK;
693	event ((W)w, EV_PERIODIC);	1791	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
694	}	1792	}
695	}	1793	}
696		1794
697	static void	1795	static void noinline
698	periodics_reschedule (ev_tstamp diff)	1796	periodics_reschedule (EV_P)
699	{	1797	{
700	int i;	1798	int i;
701		1799
702	/* adjust periodics after time jump */	1800	/* adjust periodics after time jump */
703	for (i = 0; i < periodiccnt; ++i)	1801	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
704	{	1802	{
705	struct ev_periodic *w = periodics [i];	1803	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
706		1804
		1805	if (w->reschedule_cb)
		1806	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
707	if (w->interval)	1807	else if (w->interval)
		1808	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1809
		1810	ANHE_at_cache (periodics [i]);
		1811	}
		1812
		1813	reheap (periodics, periodiccnt);
		1814	}
		1815	#endif
		1816
		1817	void inline_speed
		1818	time_update (EV_P_ ev_tstamp max_block)
		1819	{
		1820	int i;
		1821
		1822	#if EV_USE_MONOTONIC
		1823	if (expect_true (have_monotonic))
		1824	{
		1825	ev_tstamp odiff = rtmn_diff;
		1826
		1827	mn_now = get_clock ();
		1828
		1829	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1830	/* interpolate in the meantime */
		1831	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
708	{	1832	{
709	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1833	ev_rt_now = rtmn_diff + mn_now;
		1834	return;
		1835	}
710		1836
711	if (fabs (diff) >= 1e-4)	1837	now_floor = mn_now;
		1838	ev_rt_now = ev_time ();
		1839
		1840	/* loop a few times, before making important decisions.
		1841	* on the choice of "4": one iteration isn't enough,
		1842	* in case we get preempted during the calls to
		1843	* ev_time and get_clock. a second call is almost guaranteed
		1844	* to succeed in that case, though. and looping a few more times
		1845	* doesn't hurt either as we only do this on time-jumps or
		1846	* in the unlikely event of having been preempted here.
		1847	*/
		1848	for (i = 4; --i; )
		1849	{
		1850	rtmn_diff = ev_rt_now - mn_now;
		1851
		1852	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1853	return; /* all is well */
		1854
		1855	ev_rt_now = ev_time ();
		1856	mn_now = get_clock ();
		1857	now_floor = mn_now;
		1858	}
		1859
		1860	# if EV_PERIODIC_ENABLE
		1861	periodics_reschedule (EV_A);
		1862	# endif
		1863	/* no timer adjustment, as the monotonic clock doesn't jump */
		1864	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1865	}
		1866	else
		1867	#endif
		1868	{
		1869	ev_rt_now = ev_time ();
		1870
		1871	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1872	{
		1873	#if EV_PERIODIC_ENABLE
		1874	periodics_reschedule (EV_A);
		1875	#endif
		1876	/* adjust timers. this is easy, as the offset is the same for all of them */
		1877	for (i = 0; i < timercnt; ++i)
712	{	1878	{
713	ev_periodic_stop (w);	1879	ANHE *he = timers + i + HEAP0;
714	ev_periodic_start (w);	1880	ANHE_w (*he)->at += ev_rt_now - mn_now;
715		1881	ANHE_at_cache (*he);
716	i = 0; /* restart loop, inefficient, but time jumps should be rare */
717	}	1882	}
718	}	1883	}
719	}
720	}
721		1884
722	static int
723	time_update_monotonic (void)
724	{
725	now = get_clock ();
726
727	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
728	{
729	ev_now = now + diff;
730	return 0;
731	}
732	else
733	{
734	now_floor = now;
735	ev_now = ev_time ();
736	return 1;
737	}
738	}
739
740	static void
741	time_update (void)
742	{
743	int i;
744
745	#if EV_USE_MONOTONIC
746	if (expect_true (have_monotonic))
747	{
748	if (time_update_monotonic ())
749	{
750	ev_tstamp odiff = diff;
751
752	for (i = 4; --i; ) /* loop a few times, before making important decisions */
753	{
754	diff = ev_now - now;
755
756	if (fabs (odiff - diff) < MIN_TIMEJUMP)
757	return; /* all is well */
758
759	ev_now = ev_time ();
760	now = get_clock ();
761	now_floor = now;
762	}
763
764	periodics_reschedule (diff - odiff);
765	/* no timer adjustment, as the monotonic clock doesn't jump */
766	}
767	}
768	else
769	#endif
770	{
771	ev_now = ev_time ();
772
773	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
774	{
775	periodics_reschedule (ev_now - now);
776
777	/* adjust timers. this is easy, as the offset is the same for all */
778	for (i = 0; i < timercnt; ++i)
779	timers [i]->at += diff;
780	}
781
782	now = ev_now;	1885	mn_now = ev_rt_now;
783	}	1886	}
784	}	1887	}
785		1888
786	int ev_loop_done;	1889	void
		1890	ev_ref (EV_P)
		1891	{
		1892	++activecnt;
		1893	}
787		1894
		1895	void
		1896	ev_unref (EV_P)
		1897	{
		1898	--activecnt;
		1899	}
		1900
		1901	static int loop_done;
		1902
		1903	void
788	void ev_loop (int flags)	1904	ev_loop (EV_P_ int flags)
789	{	1905	{
790	double block;	1906	loop_done = EVUNLOOP_CANCEL;
791	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1907
		1908	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
792		1909
793	do	1910	do
794	{	1911	{
		1912	#if EV_VERIFY >= 2
		1913	ev_loop_verify (EV_A);
		1914	#endif
		1915
		1916	#ifndef _WIN32
		1917	if (expect_false (curpid)) /* penalise the forking check even more */
		1918	if (expect_false (getpid () != curpid))
		1919	{
		1920	curpid = getpid ();
		1921	postfork = 1;
		1922	}
		1923	#endif
		1924
		1925	#if EV_FORK_ENABLE
		1926	/* we might have forked, so queue fork handlers */
		1927	if (expect_false (postfork))
		1928	if (forkcnt)
		1929	{
		1930	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1931	call_pending (EV_A);
		1932	}
		1933	#endif
		1934
795	/* queue check watchers (and execute them) */	1935	/* queue prepare watchers (and execute them) */
796	if (expect_false (preparecnt))	1936	if (expect_false (preparecnt))
797	{	1937	{
798	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1938	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
799	call_pending ();	1939	call_pending (EV_A);
800	}	1940	}
801		1941
		1942	if (expect_false (!activecnt))
		1943	break;
		1944
		1945	/* we might have forked, so reify kernel state if necessary */
		1946	if (expect_false (postfork))
		1947	loop_fork (EV_A);
		1948
802	/* update fd-related kernel structures */	1949	/* update fd-related kernel structures */
803	fd_reify ();	1950	fd_reify (EV_A);
804		1951
805	/* calculate blocking time */	1952	/* calculate blocking time */
		1953	{
		1954	ev_tstamp waittime = 0.;
		1955	ev_tstamp sleeptime = 0.;
806		1956
807	/* we only need this for !monotonic clockor timers, but as we basically	1957	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
808	always have timers, we just calculate it always */
809	#if EV_USE_MONOTONIC
810	if (expect_true (have_monotonic))
811	time_update_monotonic ();
812	else
813	#endif
814	{	1958	{
815	ev_now = ev_time ();	1959	/* update time to cancel out callback processing overhead */
816	now = ev_now;	1960	time_update (EV_A_ 1e100);
817	}
818		1961
819	if (flags & EVLOOP_NONBLOCK || idlecnt)
820	block = 0.;
821	else
822	{
823	block = MAX_BLOCKTIME;	1962	waittime = MAX_BLOCKTIME;
824		1963
825	if (timercnt)	1964	if (timercnt)
826	{	1965	{
827	ev_tstamp to = timers [0]->at - now + method_fudge;	1966	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
828	if (block > to) block = to;	1967	if (waittime > to) waittime = to;
829	}	1968	}
830		1969
		1970	#if EV_PERIODIC_ENABLE
831	if (periodiccnt)	1971	if (periodiccnt)
832	{	1972	{
833	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1973	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
834	if (block > to) block = to;	1974	if (waittime > to) waittime = to;
835	}	1975	}
		1976	#endif
836		1977
837	if (block < 0.) block = 0.;	1978	if (expect_false (waittime < timeout_blocktime))
		1979	waittime = timeout_blocktime;
		1980
		1981	sleeptime = waittime - backend_fudge;
		1982
		1983	if (expect_true (sleeptime > io_blocktime))
		1984	sleeptime = io_blocktime;
		1985
		1986	if (sleeptime)
		1987	{
		1988	ev_sleep (sleeptime);
		1989	waittime -= sleeptime;
		1990	}
838	}	1991	}
839		1992
840	method_poll (block);	1993	++loop_count;
		1994	backend_poll (EV_A_ waittime);
841		1995
842	/* update ev_now, do magic */	1996	/* update ev_rt_now, do magic */
843	time_update ();	1997	time_update (EV_A_ waittime + sleeptime);
		1998	}
844		1999
845	/* queue pending timers and reschedule them */	2000	/* queue pending timers and reschedule them */
846	timers_reify (); /* relative timers called last */	2001	timers_reify (EV_A); /* relative timers called last */
		2002	#if EV_PERIODIC_ENABLE
847	periodics_reify (); /* absolute timers called first */	2003	periodics_reify (EV_A); /* absolute timers called first */
		2004	#endif
848		2005
		2006	#if EV_IDLE_ENABLE
849	/* queue idle watchers unless io or timers are pending */	2007	/* queue idle watchers unless other events are pending */
850	if (!pendingcnt)	2008	idle_reify (EV_A);
851	queue_events ((W *)idles, idlecnt, EV_IDLE);	2009	#endif
852		2010
853	/* queue check watchers, to be executed first */	2011	/* queue check watchers, to be executed first */
854	if (checkcnt)	2012	if (expect_false (checkcnt))
855	queue_events ((W *)checks, checkcnt, EV_CHECK);	2013	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
856		2014
857	call_pending ();	2015	call_pending (EV_A);
858	}	2016	}
859	while (!ev_loop_done);	2017	while (expect_true (
		2018	activecnt
		2019	&& !loop_done
		2020	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2021	));
860		2022
861	if (ev_loop_done != 2)	2023	if (loop_done == EVUNLOOP_ONE)
		2024	loop_done = EVUNLOOP_CANCEL;
		2025	}
		2026
		2027	void
		2028	ev_unloop (EV_P_ int how)
		2029	{
862	ev_loop_done = 0;	2030	loop_done = how;
863	}	2031	}
864		2032
865	/*****************************************************************************/	2033	/*****************************************************************************/
866		2034
867	static void	2035	void inline_size
868	wlist_add (WL *head, WL elem)	2036	wlist_add (WL *head, WL elem)
869	{	2037	{
870	elem->next = *head;	2038	elem->next = *head;
871	*head = elem;	2039	*head = elem;
872	}	2040	}
873		2041
874	static void	2042	void inline_size
875	wlist_del (WL *head, WL elem)	2043	wlist_del (WL *head, WL elem)
876	{	2044	{
877	while (*head)	2045	while (*head)
878	{	2046	{
879	if (*head == elem)	2047	if (*head == elem)
…		…
884		2052
885	head = &(*head)->next;	2053	head = &(*head)->next;
886	}	2054	}
887	}	2055	}
888		2056
889	static void	2057	void inline_speed
890	ev_clear_pending (W w)	2058	clear_pending (EV_P_ W w)
891	{	2059	{
892	if (w->pending)	2060	if (w->pending)
893	{	2061	{
894	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2062	pendings [ABSPRI (w)][w->pending - 1].w = 0;
895	w->pending = 0;	2063	w->pending = 0;
896	}	2064	}
897	}	2065	}
898		2066
899	static void	2067	int
		2068	ev_clear_pending (EV_P_ void *w)
		2069	{
		2070	W w_ = (W)w;
		2071	int pending = w_->pending;
		2072
		2073	if (expect_true (pending))
		2074	{
		2075	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2076	w_->pending = 0;
		2077	p->w = 0;
		2078	return p->events;
		2079	}
		2080	else
		2081	return 0;
		2082	}
		2083
		2084	void inline_size
		2085	pri_adjust (EV_P_ W w)
		2086	{
		2087	int pri = w->priority;
		2088	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2089	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2090	w->priority = pri;
		2091	}
		2092
		2093	void inline_speed
900	ev_start (W w, int active)	2094	ev_start (EV_P_ W w, int active)
901	{	2095	{
902	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2096	pri_adjust (EV_A_ w);
903	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
904
905	w->active = active;	2097	w->active = active;
		2098	ev_ref (EV_A);
906	}	2099	}
907		2100
908	static void	2101	void inline_size
909	ev_stop (W w)	2102	ev_stop (EV_P_ W w)
910	{	2103	{
		2104	ev_unref (EV_A);
911	w->active = 0;	2105	w->active = 0;
912	}	2106	}
913		2107
914	/*****************************************************************************/	2108	/*****************************************************************************/
915		2109
916	void	2110	void noinline
917	ev_io_start (struct ev_io *w)	2111	ev_io_start (EV_P_ ev_io *w)
918	{	2112	{
919	int fd = w->fd;	2113	int fd = w->fd;
920		2114
921	if (ev_is_active (w))	2115	if (expect_false (ev_is_active (w)))
922	return;	2116	return;
923		2117
924	assert (("ev_io_start called with negative fd", fd >= 0));	2118	assert (("ev_io_start called with negative fd", fd >= 0));
925		2119
		2120	EV_FREQUENT_CHECK;
		2121
926	ev_start ((W)w, 1);	2122	ev_start (EV_A_ (W)w, 1);
927	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	2123	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
928	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2124	wlist_add (&anfds[fd].head, (WL)w);
929		2125
930	fd_change (fd);	2126	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
931	}	2127	w->events &= ~EV_IOFDSET;
932		2128
933	void	2129	EV_FREQUENT_CHECK;
		2130	}
		2131
		2132	void noinline
934	ev_io_stop (struct ev_io *w)	2133	ev_io_stop (EV_P_ ev_io *w)
935	{	2134	{
936	ev_clear_pending ((W)w);	2135	clear_pending (EV_A_ (W)w);
937	if (!ev_is_active (w))	2136	if (expect_false (!ev_is_active (w)))
938	return;	2137	return;
939		2138
		2139	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2140
		2141	EV_FREQUENT_CHECK;
		2142
940	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2143	wlist_del (&anfds[w->fd].head, (WL)w);
941	ev_stop ((W)w);	2144	ev_stop (EV_A_ (W)w);
942		2145
943	fd_change (w->fd);	2146	fd_change (EV_A_ w->fd, 1);
944	}
945		2147
946	void	2148	EV_FREQUENT_CHECK;
		2149	}
		2150
		2151	void noinline
947	ev_timer_start (struct ev_timer *w)	2152	ev_timer_start (EV_P_ ev_timer *w)
948	{	2153	{
949	if (ev_is_active (w))	2154	if (expect_false (ev_is_active (w)))
950	return;	2155	return;
951		2156
952	w->at += now;	2157	ev_at (w) += mn_now;
953		2158
954	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2159	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
955		2160
956	ev_start ((W)w, ++timercnt);	2161	EV_FREQUENT_CHECK;
957	array_needsize (timers, timermax, timercnt, );
958	timers [timercnt - 1] = w;
959	upheap ((WT *)timers, timercnt - 1);
960	}
961		2162
962	void	2163	++timercnt;
		2164	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
		2165	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
		2166	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2167	ANHE_at_cache (timers [ev_active (w)]);
		2168	upheap (timers, ev_active (w));
		2169
		2170	EV_FREQUENT_CHECK;
		2171
		2172	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
		2173	}
		2174
		2175	void noinline
963	ev_timer_stop (struct ev_timer *w)	2176	ev_timer_stop (EV_P_ ev_timer *w)
964	{	2177	{
965	ev_clear_pending ((W)w);	2178	clear_pending (EV_A_ (W)w);
966	if (!ev_is_active (w))	2179	if (expect_false (!ev_is_active (w)))
967	return;	2180	return;
968		2181
969	if (w->active < timercnt--)	2182	EV_FREQUENT_CHECK;
		2183
		2184	{
		2185	int active = ev_active (w);
		2186
		2187	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2188
		2189	--timercnt;
		2190
		2191	if (expect_true (active < timercnt + HEAP0))
970	{	2192	{
971	timers [w->active - 1] = timers [timercnt];	2193	timers [active] = timers [timercnt + HEAP0];
972	downheap ((WT *)timers, timercnt, w->active - 1);	2194	adjustheap (timers, timercnt, active);
973	}	2195	}
		2196	}
974		2197
975	w->at = w->repeat;	2198	EV_FREQUENT_CHECK;
976		2199
		2200	ev_at (w) -= mn_now;
		2201
977	ev_stop ((W)w);	2202	ev_stop (EV_A_ (W)w);
978	}	2203	}
979		2204
980	void	2205	void noinline
981	ev_timer_again (struct ev_timer *w)	2206	ev_timer_again (EV_P_ ev_timer *w)
982	{	2207	{
		2208	EV_FREQUENT_CHECK;
		2209
983	if (ev_is_active (w))	2210	if (ev_is_active (w))
984	{	2211	{
985	if (w->repeat)	2212	if (w->repeat)
986	{	2213	{
987	w->at = now + w->repeat;	2214	ev_at (w) = mn_now + w->repeat;
		2215	ANHE_at_cache (timers [ev_active (w)]);
988	downheap ((WT *)timers, timercnt, w->active - 1);	2216	adjustheap (timers, timercnt, ev_active (w));
989	}	2217	}
990	else	2218	else
991	ev_timer_stop (w);	2219	ev_timer_stop (EV_A_ w);
992	}	2220	}
993	else if (w->repeat)	2221	else if (w->repeat)
		2222	{
		2223	ev_at (w) = w->repeat;
994	ev_timer_start (w);	2224	ev_timer_start (EV_A_ w);
995	}	2225	}
996		2226
997	void	2227	EV_FREQUENT_CHECK;
		2228	}
		2229
		2230	#if EV_PERIODIC_ENABLE
		2231	void noinline
998	ev_periodic_start (struct ev_periodic *w)	2232	ev_periodic_start (EV_P_ ev_periodic *w)
999	{	2233	{
1000	if (ev_is_active (w))	2234	if (expect_false (ev_is_active (w)))
1001	return;	2235	return;
1002		2236
		2237	if (w->reschedule_cb)
		2238	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2239	else if (w->interval)
		2240	{
1003	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2241	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1004
1005	/* this formula differs from the one in periodic_reify because we do not always round up */	2242	/* this formula differs from the one in periodic_reify because we do not always round up */
1006	if (w->interval)
1007	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	2243	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2244	}
		2245	else
		2246	ev_at (w) = w->offset;
1008		2247
		2248	EV_FREQUENT_CHECK;
		2249
		2250	++periodiccnt;
1009	ev_start ((W)w, ++periodiccnt);	2251	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1010	array_needsize (periodics, periodicmax, periodiccnt, );	2252	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1011	periodics [periodiccnt - 1] = w;	2253	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1012	upheap ((WT *)periodics, periodiccnt - 1);	2254	ANHE_at_cache (periodics [ev_active (w)]);
1013	}	2255	upheap (periodics, ev_active (w));
1014		2256
1015	void	2257	EV_FREQUENT_CHECK;
		2258
		2259	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
		2260	}
		2261
		2262	void noinline
1016	ev_periodic_stop (struct ev_periodic *w)	2263	ev_periodic_stop (EV_P_ ev_periodic *w)
1017	{	2264	{
1018	ev_clear_pending ((W)w);	2265	clear_pending (EV_A_ (W)w);
1019	if (!ev_is_active (w))	2266	if (expect_false (!ev_is_active (w)))
1020	return;	2267	return;
1021		2268
1022	if (w->active < periodiccnt--)	2269	EV_FREQUENT_CHECK;
		2270
		2271	{
		2272	int active = ev_active (w);
		2273
		2274	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2275
		2276	--periodiccnt;
		2277
		2278	if (expect_true (active < periodiccnt + HEAP0))
1023	{	2279	{
1024	periodics [w->active - 1] = periodics [periodiccnt];	2280	periodics [active] = periodics [periodiccnt + HEAP0];
1025	downheap ((WT *)periodics, periodiccnt, w->active - 1);	2281	adjustheap (periodics, periodiccnt, active);
1026	}	2282	}
		2283	}
1027		2284
		2285	EV_FREQUENT_CHECK;
		2286
1028	ev_stop ((W)w);	2287	ev_stop (EV_A_ (W)w);
1029	}	2288	}
		2289
		2290	void noinline
		2291	ev_periodic_again (EV_P_ ev_periodic *w)
		2292	{
		2293	/* TODO: use adjustheap and recalculation */
		2294	ev_periodic_stop (EV_A_ w);
		2295	ev_periodic_start (EV_A_ w);
		2296	}
		2297	#endif
1030		2298
1031	#ifndef SA_RESTART	2299	#ifndef SA_RESTART
1032	# define SA_RESTART 0	2300	# define SA_RESTART 0
1033	#endif	2301	#endif
1034		2302
1035	void	2303	void noinline
1036	ev_signal_start (struct ev_signal *w)	2304	ev_signal_start (EV_P_ ev_signal *w)
1037	{	2305	{
		2306	#if EV_MULTIPLICITY
		2307	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2308	#endif
1038	if (ev_is_active (w))	2309	if (expect_false (ev_is_active (w)))
1039	return;	2310	return;
1040		2311
1041	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2312	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1042		2313
1043	ev_start ((W)w, 1);	2314	evpipe_init (EV_A);
		2315
		2316	EV_FREQUENT_CHECK;
		2317
		2318	{
		2319	#ifndef _WIN32
		2320	sigset_t full, prev;
		2321	sigfillset (&full);
		2322	sigprocmask (SIG_SETMASK, &full, &prev);
		2323	#endif
		2324
1044	array_needsize (signals, signalmax, w->signum, signals_init);	2325	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2326
		2327	#ifndef _WIN32
		2328	sigprocmask (SIG_SETMASK, &prev, 0);
		2329	#endif
		2330	}
		2331
		2332	ev_start (EV_A_ (W)w, 1);
1045	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2333	wlist_add (&signals [w->signum - 1].head, (WL)w);
1046		2334
1047	if (!w->next)	2335	if (!((WL)w)->next)
1048	{	2336	{
		2337	#if _WIN32
		2338	signal (w->signum, ev_sighandler);
		2339	#else
1049	struct sigaction sa;	2340	struct sigaction sa;
1050	sa.sa_handler = sighandler;	2341	sa.sa_handler = ev_sighandler;
1051	sigfillset (&sa.sa_mask);	2342	sigfillset (&sa.sa_mask);
1052	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2343	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1053	sigaction (w->signum, &sa, 0);	2344	sigaction (w->signum, &sa, 0);
		2345	#endif
1054	}	2346	}
1055	}
1056		2347
1057	void	2348	EV_FREQUENT_CHECK;
		2349	}
		2350
		2351	void noinline
1058	ev_signal_stop (struct ev_signal *w)	2352	ev_signal_stop (EV_P_ ev_signal *w)
1059	{	2353	{
1060	ev_clear_pending ((W)w);	2354	clear_pending (EV_A_ (W)w);
1061	if (!ev_is_active (w))	2355	if (expect_false (!ev_is_active (w)))
1062	return;	2356	return;
1063		2357
		2358	EV_FREQUENT_CHECK;
		2359
1064	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2360	wlist_del (&signals [w->signum - 1].head, (WL)w);
1065	ev_stop ((W)w);	2361	ev_stop (EV_A_ (W)w);
1066		2362
1067	if (!signals [w->signum - 1].head)	2363	if (!signals [w->signum - 1].head)
1068	signal (w->signum, SIG_DFL);	2364	signal (w->signum, SIG_DFL);
1069	}
1070		2365
		2366	EV_FREQUENT_CHECK;
		2367	}
		2368
1071	void	2369	void
1072	ev_idle_start (struct ev_idle *w)	2370	ev_child_start (EV_P_ ev_child *w)
1073	{	2371	{
		2372	#if EV_MULTIPLICITY
		2373	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2374	#endif
1074	if (ev_is_active (w))	2375	if (expect_false (ev_is_active (w)))
1075	return;	2376	return;
1076		2377
1077	ev_start ((W)w, ++idlecnt);	2378	EV_FREQUENT_CHECK;
1078	array_needsize (idles, idlemax, idlecnt, );
1079	idles [idlecnt - 1] = w;
1080	}
1081		2379
		2380	ev_start (EV_A_ (W)w, 1);
		2381	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2382
		2383	EV_FREQUENT_CHECK;
		2384	}
		2385
1082	void	2386	void
1083	ev_idle_stop (struct ev_idle *w)	2387	ev_child_stop (EV_P_ ev_child *w)
1084	{	2388	{
1085	ev_clear_pending ((W)w);	2389	clear_pending (EV_A_ (W)w);
1086	if (ev_is_active (w))	2390	if (expect_false (!ev_is_active (w)))
1087	return;	2391	return;
1088		2392
1089	idles [w->active - 1] = idles [--idlecnt];	2393	EV_FREQUENT_CHECK;
		2394
		2395	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1090	ev_stop ((W)w);	2396	ev_stop (EV_A_ (W)w);
1091	}
1092		2397
1093	void	2398	EV_FREQUENT_CHECK;
1094	ev_prepare_start (struct ev_prepare *w)	2399	}
		2400
		2401	#if EV_STAT_ENABLE
		2402
		2403	# ifdef _WIN32
		2404	# undef lstat
		2405	# define lstat(a,b) _stati64 (a,b)
		2406	# endif
		2407
		2408	#define DEF_STAT_INTERVAL 5.0074891
		2409	#define MIN_STAT_INTERVAL 0.1074891
		2410
		2411	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2412
		2413	#if EV_USE_INOTIFY
		2414	# define EV_INOTIFY_BUFSIZE 8192
		2415
		2416	static void noinline
		2417	infy_add (EV_P_ ev_stat *w)
1095	{	2418	{
1096	if (ev_is_active (w))	2419	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);
		2420
		2421	if (w->wd < 0)
		2422	{
		2423	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2424
		2425	/* monitor some parent directory for speedup hints */
		2426	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2427	/* but an efficiency issue only */
		2428	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2429	{
		2430	char path [4096];
		2431	strcpy (path, w->path);
		2432
		2433	do
		2434	{
		2435	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2436	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2437
		2438	char *pend = strrchr (path, '/');
		2439
		2440	if (!pend)
		2441	break; /* whoops, no '/', complain to your admin */
		2442
		2443	*pend = 0;
		2444	w->wd = inotify_add_watch (fs_fd, path, mask);
		2445	}
		2446	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2447	}
		2448	}
		2449	else
		2450	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2451
		2452	if (w->wd >= 0)
		2453	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2454	}
		2455
		2456	static void noinline
		2457	infy_del (EV_P_ ev_stat *w)
		2458	{
		2459	int slot;
		2460	int wd = w->wd;
		2461
		2462	if (wd < 0)
1097	return;	2463	return;
1098		2464
		2465	w->wd = -2;
		2466	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2467	wlist_del (&fs_hash [slot].head, (WL)w);
		2468
		2469	/* remove this watcher, if others are watching it, they will rearm */
		2470	inotify_rm_watch (fs_fd, wd);
		2471	}
		2472
		2473	static void noinline
		2474	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2475	{
		2476	if (slot < 0)
		2477	/* overflow, need to check for all hahs slots */
		2478	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2479	infy_wd (EV_A_ slot, wd, ev);
		2480	else
		2481	{
		2482	WL w_;
		2483
		2484	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2485	{
		2486	ev_stat *w = (ev_stat *)w_;
		2487	w_ = w_->next; /* lets us remove this watcher and all before it */
		2488
		2489	if (w->wd == wd || wd == -1)
		2490	{
		2491	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2492	{
		2493	w->wd = -1;
		2494	infy_add (EV_A_ w); /* re-add, no matter what */
		2495	}
		2496
		2497	stat_timer_cb (EV_A_ &w->timer, 0);
		2498	}
		2499	}
		2500	}
		2501	}
		2502
		2503	static void
		2504	infy_cb (EV_P_ ev_io *w, int revents)
		2505	{
		2506	char buf [EV_INOTIFY_BUFSIZE];
		2507	struct inotify_event *ev = (struct inotify_event *)buf;
		2508	int ofs;
		2509	int len = read (fs_fd, buf, sizeof (buf));
		2510
		2511	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2512	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2513	}
		2514
		2515	void inline_size
		2516	infy_init (EV_P)
		2517	{
		2518	if (fs_fd != -2)
		2519	return;
		2520
		2521	fs_fd = inotify_init ();
		2522
		2523	if (fs_fd >= 0)
		2524	{
		2525	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2526	ev_set_priority (&fs_w, EV_MAXPRI);
		2527	ev_io_start (EV_A_ &fs_w);
		2528	}
		2529	}
		2530
		2531	void inline_size
		2532	infy_fork (EV_P)
		2533	{
		2534	int slot;
		2535
		2536	if (fs_fd < 0)
		2537	return;
		2538
		2539	close (fs_fd);
		2540	fs_fd = inotify_init ();
		2541
		2542	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2543	{
		2544	WL w_ = fs_hash [slot].head;
		2545	fs_hash [slot].head = 0;
		2546
		2547	while (w_)
		2548	{
		2549	ev_stat *w = (ev_stat *)w_;
		2550	w_ = w_->next; /* lets us add this watcher */
		2551
		2552	w->wd = -1;
		2553
		2554	if (fs_fd >= 0)
		2555	infy_add (EV_A_ w); /* re-add, no matter what */
		2556	else
		2557	ev_timer_start (EV_A_ &w->timer);
		2558	}
		2559
		2560	}
		2561	}
		2562
		2563	#endif
		2564
		2565	void
		2566	ev_stat_stat (EV_P_ ev_stat *w)
		2567	{
		2568	if (lstat (w->path, &w->attr) < 0)
		2569	w->attr.st_nlink = 0;
		2570	else if (!w->attr.st_nlink)
		2571	w->attr.st_nlink = 1;
		2572	}
		2573
		2574	static void noinline
		2575	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2576	{
		2577	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2578
		2579	/* we copy this here each the time so that */
		2580	/* prev has the old value when the callback gets invoked */
		2581	w->prev = w->attr;
		2582	ev_stat_stat (EV_A_ w);
		2583
		2584	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2585	if (
		2586	w->prev.st_dev != w->attr.st_dev
		2587	|| w->prev.st_ino != w->attr.st_ino
		2588	|| w->prev.st_mode != w->attr.st_mode
		2589	|| w->prev.st_nlink != w->attr.st_nlink
		2590	|| w->prev.st_uid != w->attr.st_uid
		2591	|| w->prev.st_gid != w->attr.st_gid
		2592	|| w->prev.st_rdev != w->attr.st_rdev
		2593	|| w->prev.st_size != w->attr.st_size
		2594	|| w->prev.st_atime != w->attr.st_atime
		2595	|| w->prev.st_mtime != w->attr.st_mtime
		2596	|| w->prev.st_ctime != w->attr.st_ctime
		2597	) {
		2598	#if EV_USE_INOTIFY
		2599	infy_del (EV_A_ w);
		2600	infy_add (EV_A_ w);
		2601	ev_stat_stat (EV_A_ w); /* avoid race... */
		2602	#endif
		2603
		2604	ev_feed_event (EV_A_ w, EV_STAT);
		2605	}
		2606	}
		2607
		2608	void
		2609	ev_stat_start (EV_P_ ev_stat *w)
		2610	{
		2611	if (expect_false (ev_is_active (w)))
		2612	return;
		2613
		2614	/* since we use memcmp, we need to clear any padding data etc. */
		2615	memset (&w->prev, 0, sizeof (ev_statdata));
		2616	memset (&w->attr, 0, sizeof (ev_statdata));
		2617
		2618	ev_stat_stat (EV_A_ w);
		2619
		2620	if (w->interval < MIN_STAT_INTERVAL)
		2621	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2622
		2623	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2624	ev_set_priority (&w->timer, ev_priority (w));
		2625
		2626	#if EV_USE_INOTIFY
		2627	infy_init (EV_A);
		2628
		2629	if (fs_fd >= 0)
		2630	infy_add (EV_A_ w);
		2631	else
		2632	#endif
		2633	ev_timer_start (EV_A_ &w->timer);
		2634
		2635	ev_start (EV_A_ (W)w, 1);
		2636
		2637	EV_FREQUENT_CHECK;
		2638	}
		2639
		2640	void
		2641	ev_stat_stop (EV_P_ ev_stat *w)
		2642	{
		2643	clear_pending (EV_A_ (W)w);
		2644	if (expect_false (!ev_is_active (w)))
		2645	return;
		2646
		2647	EV_FREQUENT_CHECK;
		2648
		2649	#if EV_USE_INOTIFY
		2650	infy_del (EV_A_ w);
		2651	#endif
		2652	ev_timer_stop (EV_A_ &w->timer);
		2653
		2654	ev_stop (EV_A_ (W)w);
		2655
		2656	EV_FREQUENT_CHECK;
		2657	}
		2658	#endif
		2659
		2660	#if EV_IDLE_ENABLE
		2661	void
		2662	ev_idle_start (EV_P_ ev_idle *w)
		2663	{
		2664	if (expect_false (ev_is_active (w)))
		2665	return;
		2666
		2667	pri_adjust (EV_A_ (W)w);
		2668
		2669	EV_FREQUENT_CHECK;
		2670
		2671	{
		2672	int active = ++idlecnt [ABSPRI (w)];
		2673
		2674	++idleall;
		2675	ev_start (EV_A_ (W)w, active);
		2676
		2677	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2678	idles [ABSPRI (w)][active - 1] = w;
		2679	}
		2680
		2681	EV_FREQUENT_CHECK;
		2682	}
		2683
		2684	void
		2685	ev_idle_stop (EV_P_ ev_idle *w)
		2686	{
		2687	clear_pending (EV_A_ (W)w);
		2688	if (expect_false (!ev_is_active (w)))
		2689	return;
		2690
		2691	EV_FREQUENT_CHECK;
		2692
		2693	{
		2694	int active = ev_active (w);
		2695
		2696	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2697	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2698
		2699	ev_stop (EV_A_ (W)w);
		2700	--idleall;
		2701	}
		2702
		2703	EV_FREQUENT_CHECK;
		2704	}
		2705	#endif
		2706
		2707	void
		2708	ev_prepare_start (EV_P_ ev_prepare *w)
		2709	{
		2710	if (expect_false (ev_is_active (w)))
		2711	return;
		2712
		2713	EV_FREQUENT_CHECK;
		2714
1099	ev_start ((W)w, ++preparecnt);	2715	ev_start (EV_A_ (W)w, ++preparecnt);
1100	array_needsize (prepares, preparemax, preparecnt, );	2716	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1101	prepares [preparecnt - 1] = w;	2717	prepares [preparecnt - 1] = w;
1102	}
1103		2718
		2719	EV_FREQUENT_CHECK;
		2720	}
		2721
1104	void	2722	void
1105	ev_prepare_stop (struct ev_prepare *w)	2723	ev_prepare_stop (EV_P_ ev_prepare *w)
1106	{	2724	{
1107	ev_clear_pending ((W)w);	2725	clear_pending (EV_A_ (W)w);
1108	if (ev_is_active (w))	2726	if (expect_false (!ev_is_active (w)))
1109	return;	2727	return;
1110		2728
		2729	EV_FREQUENT_CHECK;
		2730
		2731	{
		2732	int active = ev_active (w);
		2733
1111	prepares [w->active - 1] = prepares [--preparecnt];	2734	prepares [active - 1] = prepares [--preparecnt];
		2735	ev_active (prepares [active - 1]) = active;
		2736	}
		2737
1112	ev_stop ((W)w);	2738	ev_stop (EV_A_ (W)w);
1113	}
1114		2739
		2740	EV_FREQUENT_CHECK;
		2741	}
		2742
1115	void	2743	void
1116	ev_check_start (struct ev_check *w)	2744	ev_check_start (EV_P_ ev_check *w)
1117	{	2745	{
1118	if (ev_is_active (w))	2746	if (expect_false (ev_is_active (w)))
1119	return;	2747	return;
1120		2748
		2749	EV_FREQUENT_CHECK;
		2750
1121	ev_start ((W)w, ++checkcnt);	2751	ev_start (EV_A_ (W)w, ++checkcnt);
1122	array_needsize (checks, checkmax, checkcnt, );	2752	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1123	checks [checkcnt - 1] = w;	2753	checks [checkcnt - 1] = w;
1124	}
1125		2754
		2755	EV_FREQUENT_CHECK;
		2756	}
		2757
1126	void	2758	void
1127	ev_check_stop (struct ev_check *w)	2759	ev_check_stop (EV_P_ ev_check *w)
1128	{	2760	{
1129	ev_clear_pending ((W)w);	2761	clear_pending (EV_A_ (W)w);
1130	if (ev_is_active (w))	2762	if (expect_false (!ev_is_active (w)))
1131	return;	2763	return;
1132		2764
		2765	EV_FREQUENT_CHECK;
		2766
		2767	{
		2768	int active = ev_active (w);
		2769
1133	checks [w->active - 1] = checks [--checkcnt];	2770	checks [active - 1] = checks [--checkcnt];
		2771	ev_active (checks [active - 1]) = active;
		2772	}
		2773
1134	ev_stop ((W)w);	2774	ev_stop (EV_A_ (W)w);
1135	}
1136		2775
1137	void	2776	EV_FREQUENT_CHECK;
1138	ev_child_start (struct ev_child *w)	2777	}
		2778
		2779	#if EV_EMBED_ENABLE
		2780	void noinline
		2781	ev_embed_sweep (EV_P_ ev_embed *w)
1139	{	2782	{
		2783	ev_loop (w->other, EVLOOP_NONBLOCK);
		2784	}
		2785
		2786	static void
		2787	embed_io_cb (EV_P_ ev_io *io, int revents)
		2788	{
		2789	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2790
1140	if (ev_is_active (w))	2791	if (ev_cb (w))
		2792	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2793	else
		2794	ev_loop (w->other, EVLOOP_NONBLOCK);
		2795	}
		2796
		2797	static void
		2798	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2799	{
		2800	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2801
		2802	{
		2803	struct ev_loop *loop = w->other;
		2804
		2805	while (fdchangecnt)
		2806	{
		2807	fd_reify (EV_A);
		2808	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2809	}
		2810	}
		2811	}
		2812
		2813	#if 0
		2814	static void
		2815	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2816	{
		2817	ev_idle_stop (EV_A_ idle);
		2818	}
		2819	#endif
		2820
		2821	void
		2822	ev_embed_start (EV_P_ ev_embed *w)
		2823	{
		2824	if (expect_false (ev_is_active (w)))
1141	return;	2825	return;
1142		2826
		2827	{
		2828	struct ev_loop *loop = w->other;
		2829	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2830	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2831	}
		2832
		2833	EV_FREQUENT_CHECK;
		2834
		2835	ev_set_priority (&w->io, ev_priority (w));
		2836	ev_io_start (EV_A_ &w->io);
		2837
		2838	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2839	ev_set_priority (&w->prepare, EV_MINPRI);
		2840	ev_prepare_start (EV_A_ &w->prepare);
		2841
		2842	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2843
1143	ev_start ((W)w, 1);	2844	ev_start (EV_A_ (W)w, 1);
1144	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1145	}
1146		2845
		2846	EV_FREQUENT_CHECK;
		2847	}
		2848
1147	void	2849	void
1148	ev_child_stop (struct ev_child *w)	2850	ev_embed_stop (EV_P_ ev_embed *w)
1149	{	2851	{
1150	ev_clear_pending ((W)w);	2852	clear_pending (EV_A_ (W)w);
1151	if (ev_is_active (w))	2853	if (expect_false (!ev_is_active (w)))
1152	return;	2854	return;
1153		2855
1154	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2856	EV_FREQUENT_CHECK;
		2857
		2858	ev_io_stop (EV_A_ &w->io);
		2859	ev_prepare_stop (EV_A_ &w->prepare);
		2860
1155	ev_stop ((W)w);	2861	ev_stop (EV_A_ (W)w);
		2862
		2863	EV_FREQUENT_CHECK;
1156	}	2864	}
		2865	#endif
		2866
		2867	#if EV_FORK_ENABLE
		2868	void
		2869	ev_fork_start (EV_P_ ev_fork *w)
		2870	{
		2871	if (expect_false (ev_is_active (w)))
		2872	return;
		2873
		2874	EV_FREQUENT_CHECK;
		2875
		2876	ev_start (EV_A_ (W)w, ++forkcnt);
		2877	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2878	forks [forkcnt - 1] = w;
		2879
		2880	EV_FREQUENT_CHECK;
		2881	}
		2882
		2883	void
		2884	ev_fork_stop (EV_P_ ev_fork *w)
		2885	{
		2886	clear_pending (EV_A_ (W)w);
		2887	if (expect_false (!ev_is_active (w)))
		2888	return;
		2889
		2890	EV_FREQUENT_CHECK;
		2891
		2892	{
		2893	int active = ev_active (w);
		2894
		2895	forks [active - 1] = forks [--forkcnt];
		2896	ev_active (forks [active - 1]) = active;
		2897	}
		2898
		2899	ev_stop (EV_A_ (W)w);
		2900
		2901	EV_FREQUENT_CHECK;
		2902	}
		2903	#endif
		2904
		2905	#if EV_ASYNC_ENABLE
		2906	void
		2907	ev_async_start (EV_P_ ev_async *w)
		2908	{
		2909	if (expect_false (ev_is_active (w)))
		2910	return;
		2911
		2912	evpipe_init (EV_A);
		2913
		2914	EV_FREQUENT_CHECK;
		2915
		2916	ev_start (EV_A_ (W)w, ++asynccnt);
		2917	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2918	asyncs [asynccnt - 1] = w;
		2919
		2920	EV_FREQUENT_CHECK;
		2921	}
		2922
		2923	void
		2924	ev_async_stop (EV_P_ ev_async *w)
		2925	{
		2926	clear_pending (EV_A_ (W)w);
		2927	if (expect_false (!ev_is_active (w)))
		2928	return;
		2929
		2930	EV_FREQUENT_CHECK;
		2931
		2932	{
		2933	int active = ev_active (w);
		2934
		2935	asyncs [active - 1] = asyncs [--asynccnt];
		2936	ev_active (asyncs [active - 1]) = active;
		2937	}
		2938
		2939	ev_stop (EV_A_ (W)w);
		2940
		2941	EV_FREQUENT_CHECK;
		2942	}
		2943
		2944	void
		2945	ev_async_send (EV_P_ ev_async *w)
		2946	{
		2947	w->sent = 1;
		2948	evpipe_write (EV_A_ &gotasync);
		2949	}
		2950	#endif
1157		2951
1158	/*****************************************************************************/	2952	/*****************************************************************************/
1159		2953
1160	struct ev_once	2954	struct ev_once
1161	{	2955	{
1162	struct ev_io io;	2956	ev_io io;
1163	struct ev_timer to;	2957	ev_timer to;
1164	void (*cb)(int revents, void *arg);	2958	void (*cb)(int revents, void *arg);
1165	void *arg;	2959	void *arg;
1166	};	2960	};
1167		2961
1168	static void	2962	static void
1169	once_cb (struct ev_once *once, int revents)	2963	once_cb (EV_P_ struct ev_once *once, int revents)
1170	{	2964	{
1171	void (*cb)(int revents, void *arg) = once->cb;	2965	void (*cb)(int revents, void *arg) = once->cb;
1172	void *arg = once->arg;	2966	void *arg = once->arg;
1173		2967
1174	ev_io_stop (&once->io);	2968	ev_io_stop (EV_A_ &once->io);
1175	ev_timer_stop (&once->to);	2969	ev_timer_stop (EV_A_ &once->to);
1176	free (once);	2970	ev_free (once);
1177		2971
1178	cb (revents, arg);	2972	cb (revents, arg);
1179	}	2973	}
1180		2974
1181	static void	2975	static void
1182	once_cb_io (struct ev_io *w, int revents)	2976	once_cb_io (EV_P_ ev_io *w, int revents)
1183	{	2977	{
1184	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2978	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1185	}	2979	}
1186		2980
1187	static void	2981	static void
1188	once_cb_to (struct ev_timer *w, int revents)	2982	once_cb_to (EV_P_ ev_timer *w, int revents)
1189	{	2983	{
1190	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2984	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1191	}	2985	}
1192		2986
1193	void	2987	void
1194	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2988	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1195	{	2989	{
1196	struct ev_once *once = malloc (sizeof (struct ev_once));	2990	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1197		2991
1198	if (!once)	2992	if (expect_false (!once))
		2993	{
1199	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2994	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1200	else	2995	return;
1201	{	2996	}
		2997
1202	once->cb = cb;	2998	once->cb = cb;
1203	once->arg = arg;	2999	once->arg = arg;
1204		3000
1205	ev_watcher_init (&once->io, once_cb_io);	3001	ev_init (&once->io, once_cb_io);
1206	if (fd >= 0)	3002	if (fd >= 0)
1207	{	3003	{
1208	ev_io_set (&once->io, fd, events);	3004	ev_io_set (&once->io, fd, events);
1209	ev_io_start (&once->io);	3005	ev_io_start (EV_A_ &once->io);
1210	}	3006	}
1211		3007
1212	ev_watcher_init (&once->to, once_cb_to);	3008	ev_init (&once->to, once_cb_to);
1213	if (timeout >= 0.)	3009	if (timeout >= 0.)
1214	{	3010	{
1215	ev_timer_set (&once->to, timeout, 0.);	3011	ev_timer_set (&once->to, timeout, 0.);
1216	ev_timer_start (&once->to);	3012	ev_timer_start (EV_A_ &once->to);
1217	}
1218	}
1219	}
1220
1221	/*****************************************************************************/
1222
1223	#if 0
1224
1225	struct ev_io wio;
1226
1227	static void
1228	sin_cb (struct ev_io *w, int revents)
1229	{
1230	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1231	}
1232
1233	static void
1234	ocb (struct ev_timer *w, int revents)
1235	{
1236	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1237	ev_timer_stop (w);
1238	ev_timer_start (w);
1239	}
1240
1241	static void
1242	scb (struct ev_signal *w, int revents)
1243	{
1244	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1245	ev_io_stop (&wio);
1246	ev_io_start (&wio);
1247	}
1248
1249	static void
1250	gcb (struct ev_signal *w, int revents)
1251	{
1252	fprintf (stderr, "generic %x\n", revents);
1253
1254	}
1255
1256	int main (void)
1257	{
1258	ev_init (0);
1259
1260	ev_io_init (&wio, sin_cb, 0, EV_READ);
1261	ev_io_start (&wio);
1262
1263	struct ev_timer t[10000];
1264
1265	#if 0
1266	int i;
1267	for (i = 0; i < 10000; ++i)
1268	{	3013	}
1269	struct ev_timer *w = t + i;
1270	ev_watcher_init (w, ocb, i);
1271	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1272	ev_timer_start (w);
1273	if (drand48 () < 0.5)
1274	ev_timer_stop (w);
1275	}
1276	#endif
1277
1278	struct ev_timer t1;
1279	ev_timer_init (&t1, ocb, 5, 10);
1280	ev_timer_start (&t1);
1281
1282	struct ev_signal sig;
1283	ev_signal_init (&sig, scb, SIGQUIT);
1284	ev_signal_start (&sig);
1285
1286	struct ev_check cw;
1287	ev_check_init (&cw, gcb);
1288	ev_check_start (&cw);
1289
1290	struct ev_idle iw;
1291	ev_idle_init (&iw, gcb);
1292	ev_idle_start (&iw);
1293
1294	ev_loop (0);
1295
1296	return 0;
1297	}	3014	}
1298		3015
		3016	#if EV_MULTIPLICITY
		3017	#include "ev_wrap.h"
1299	#endif	3018	#endif
1300		3019
		3020	#ifdef __cplusplus
		3021	}
		3022	#endif
1301		3023
1302
1303

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