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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.101 by root, Sun Nov 11 04:04:23 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		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	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
		64	#endif
		65
1	#include <math.h>	66	#include <math.h>
2	#include <stdlib.h>	67	#include <stdlib.h>
		68	#include <fcntl.h>
		69	#include <stddef.h>
3		70
4	#include <stdio.h>	71	#include <stdio.h>
5		72
		73	#include <assert.h>
6	#include <errno.h>	74	#include <errno.h>
7	#include <sys/time.h>	75	#include <sys/types.h>
8	#include <time.h>	76	#include <time.h>
9		77
		78	#include <signal.h>
		79
		80	#ifndef WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#endif
		85	/**/
		86
		87	#ifndef EV_USE_MONOTONIC
		88	# define EV_USE_MONOTONIC 1
		89	#endif
		90
		91	#ifndef EV_USE_SELECT
		92	# define EV_USE_SELECT 1
		93	#endif
		94
		95	#ifndef EV_USE_POLL
		96	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		97	#endif
		98
		99	#ifndef EV_USE_EPOLL
		100	# define EV_USE_EPOLL 0
		101	#endif
		102
		103	#ifndef EV_USE_KQUEUE
		104	# define EV_USE_KQUEUE 0
		105	#endif
		106
		107	#ifndef EV_USE_WIN32
		108	# ifdef WIN32
		109	# define EV_USE_WIN32 0 /* it does not exist, use select */
		110	# undef EV_USE_SELECT
		111	# define EV_USE_SELECT 1
		112	# else
		113	# define EV_USE_WIN32 0
		114	# endif
		115	#endif
		116
		117	#ifndef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 1
		119	#endif
		120
		121	/**/
		122
10	#ifdef CLOCK_MONOTONIC	123	#ifndef CLOCK_MONOTONIC
		124	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	125	# define EV_USE_MONOTONIC 0
12	#endif	126	#endif
13		127
14	#define HAVE_EPOLL 1	128	#ifndef CLOCK_REALTIME
		129	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	130	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	131	#endif
17		132
18	#define MAX_BLOCKTIME 60.	133	/**/
19		134
		135	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		136	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		137	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		138	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
		139
		140	#ifdef EV_H
		141	# include EV_H
		142	#else
20	#include "ev.h"	143	# include "ev.h"
		144	#endif
21		145
		146	#if __GNUC__ >= 3
		147	# define expect(expr,value) __builtin_expect ((expr),(value))
		148	# define inline inline
		149	#else
		150	# define expect(expr,value) (expr)
		151	# define inline static
		152	#endif
		153
		154	#define expect_false(expr) expect ((expr) != 0, 0)
		155	#define expect_true(expr) expect ((expr) != 0, 1)
		156
		157	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		158	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		159
22	struct ev_watcher {	160	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	161	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	162	typedef struct ev_watcher_time *WT;
28	};
29		163
		164	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		165
		166	#ifdef WIN32
		167	# include "ev_win32.c"
		168	#endif
		169
		170	/*****************************************************************************/
		171
		172	static void (*syserr_cb)(const char *msg);
		173
		174	void ev_set_syserr_cb (void (*cb)(const char *msg))
		175	{
		176	syserr_cb = cb;
		177	}
		178
		179	static void
		180	syserr (const char *msg)
		181	{
		182	if (!msg)
		183	msg = "(libev) system error";
		184
		185	if (syserr_cb)
		186	syserr_cb (msg);
		187	else
		188	{
		189	perror (msg);
		190	abort ();
		191	}
		192	}
		193
		194	static void *(*alloc)(void *ptr, long size);
		195
		196	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		197	{
		198	alloc = cb;
		199	}
		200
		201	static void *
		202	ev_realloc (void *ptr, long size)
		203	{
		204	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		205
		206	if (!ptr && size)
		207	{
		208	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		209	abort ();
		210	}
		211
		212	return ptr;
		213	}
		214
		215	#define ev_malloc(size) ev_realloc (0, (size))
		216	#define ev_free(ptr) ev_realloc ((ptr), 0)
		217
		218	/*****************************************************************************/
		219
		220	typedef struct
		221	{
		222	WL head;
		223	unsigned char events;
		224	unsigned char reify;
		225	} ANFD;
		226
		227	typedef struct
		228	{
		229	W w;
		230	int events;
		231	} ANPENDING;
		232
		233	#if EV_MULTIPLICITY
		234
		235	struct ev_loop
		236	{
		237	ev_tstamp ev_rt_now;
		238	#define ev_rt_now ((loop)->ev_rt_now)
		239	#define VAR(name,decl) decl;
		240	#include "ev_vars.h"
		241	#undef VAR
		242	};
		243	#include "ev_wrap.h"
		244
		245	struct ev_loop default_loop_struct;
		246	static struct ev_loop *default_loop;
		247
		248	#else
		249
30	ev_tstamp ev_now;	250	ev_tstamp ev_rt_now;
31	int ev_method;	251	#define VAR(name,decl) static decl;
		252	#include "ev_vars.h"
		253	#undef VAR
32		254
33	static int have_monotonic; /* runtime */	255	static int default_loop;
34		256
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	257	#endif
36	static void (*method_reify)(void);	258
37	static void (*method_poll)(ev_tstamp timeout);	259	/*****************************************************************************/
38		260
39	ev_tstamp	261	ev_tstamp
40	ev_time (void)	262	ev_time (void)
41	{	263	{
42	#if HAVE_REALTIME	264	#if EV_USE_REALTIME
43	struct timespec ts;	265	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	266	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	267	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	268	#else
47	struct timeval tv;	269	struct timeval tv;
48	gettimeofday (&tv, 0);	270	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	271	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	272	#endif
51	}	273	}
52		274
53	static ev_tstamp	275	inline ev_tstamp
54	get_clock (void)	276	get_clock (void)
55	{	277	{
56	#if HAVE_MONOTONIC	278	#if EV_USE_MONOTONIC
57	if (have_monotonic)	279	if (expect_true (have_monotonic))
58	{	280	{
59	struct timespec ts;	281	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	282	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	283	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	284	}
63	#endif	285	#endif
64		286
65	return ev_time ();	287	return ev_time ();
66	}	288	}
67		289
		290	#if EV_MULTIPLICITY
		291	ev_tstamp
		292	ev_now (EV_P)
		293	{
		294	return ev_rt_now;
		295	}
		296	#endif
		297
		298	#define array_roundsize(type,n) ((n) | 4 & ~3)
		299
68	#define array_needsize(base,cur,cnt,init) \	300	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	301	if (expect_false ((cnt) > cur)) \
70	{ \	302	{ \
71	int newcnt = cur ? cur << 1 : 16; \	303	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	304	do \
		305	{ \
		306	newcnt = array_roundsize (type, newcnt << 1); \
		307	} \
		308	while ((cnt) > newcnt); \
		309	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	310	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
74	init (base + cur, newcnt - cur); \	311	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	312	cur = newcnt; \
76	}	313	}
77		314
78	typedef struct	315	#define array_slim(type,stem) \
79	{	316	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
80	struct ev_io *head;	317	{ \
81	unsigned char wev, rev; /* want, received event set */	318	stem ## max = array_roundsize (stem ## cnt >> 1); \
82	} ANFD;	319	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		320	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		321	}
83		322
84	static ANFD *anfds;	323	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
85	static int anfdmax;	324	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		325	#define array_free_microshit(stem) \
		326	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
86		327
87	static int *fdchanges;	328	#define array_free(stem, idx) \
88	static int fdchangemax, fdchangecnt;	329	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		330
		331	/*****************************************************************************/
89		332
90	static void	333	static void
91	anfds_init (ANFD *base, int count)	334	anfds_init (ANFD *base, int count)
92	{	335	{
93	while (count--)	336	while (count--)
94	{	337	{
95	base->head = 0;	338	base->head = 0;
96	base->wev = base->rev = EV_NONE;	339	base->events = EV_NONE;
		340	base->reify = 0;
		341
97	++base;	342	++base;
98	}	343	}
99	}	344	}
100		345
101	typedef struct	346	void
		347	ev_feed_event (EV_P_ void *w, int revents)
102	{	348	{
103	struct ev_watcher *w;	349	W w_ = (W)w;
104	int events;
105	} ANPENDING;
106		350
107	static ANPENDING *pendings;	351	if (w_->pending)
108	static int pendingmax, pendingcnt;	352	{
		353	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		354	return;
		355	}
109		356
110	static void
111	event (struct ev_watcher *w, int events)
112	{
113	w->pending = ++pendingcnt;	357	w_->pending = ++pendingcnt [ABSPRI (w_)];
114	array_needsize (pendings, pendingmax, pendingcnt, );	358	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
115	pendings [pendingcnt - 1].w = w;	359	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
116	pendings [pendingcnt - 1].events = events;	360	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
117	}	361	}
118		362
119	static void	363	static void
		364	queue_events (EV_P_ W *events, int eventcnt, int type)
		365	{
		366	int i;
		367
		368	for (i = 0; i < eventcnt; ++i)
		369	ev_feed_event (EV_A_ events [i], type);
		370	}
		371
		372	inline void
120	fd_event (int fd, int events)	373	fd_event (EV_P_ int fd, int revents)
121	{	374	{
122	ANFD *anfd = anfds + fd;	375	ANFD *anfd = anfds + fd;
123	struct ev_io *w;	376	struct ev_io *w;
124		377
125	for (w = anfd->head; w; w = w->next)	378	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126	{	379	{
127	int ev = w->events & events;	380	int ev = w->events & revents;
128		381
129	if (ev)	382	if (ev)
130	event ((struct ev_watcher *)w, ev);	383	ev_feed_event (EV_A_ (W)w, ev);
		384	}
		385	}
		386
		387	void
		388	ev_feed_fd_event (EV_P_ int fd, int revents)
		389	{
		390	fd_event (EV_A_ fd, revents);
		391	}
		392
		393	/*****************************************************************************/
		394
		395	static void
		396	fd_reify (EV_P)
		397	{
		398	int i;
		399
		400	for (i = 0; i < fdchangecnt; ++i)
		401	{
		402	int fd = fdchanges [i];
		403	ANFD *anfd = anfds + fd;
		404	struct ev_io *w;
		405
		406	int events = 0;
		407
		408	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		409	events |= w->events;
		410
		411	anfd->reify = 0;
		412
		413	method_modify (EV_A_ fd, anfd->events, events);
		414	anfd->events = events;
		415	}
		416
		417	fdchangecnt = 0;
		418	}
		419
		420	static void
		421	fd_change (EV_P_ int fd)
		422	{
		423	if (anfds [fd].reify)
		424	return;
		425
		426	anfds [fd].reify = 1;
		427
		428	++fdchangecnt;
		429	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		430	fdchanges [fdchangecnt - 1] = fd;
		431	}
		432
		433	static void
		434	fd_kill (EV_P_ int fd)
		435	{
		436	struct ev_io *w;
		437
		438	while ((w = (struct ev_io *)anfds [fd].head))
		439	{
		440	ev_io_stop (EV_A_ w);
		441	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		442	}
		443	}
		444
		445	static int
		446	fd_valid (int fd)
		447	{
		448	#ifdef WIN32
		449	return !!win32_get_osfhandle (fd);
		450	#else
		451	return fcntl (fd, F_GETFD) != -1;
		452	#endif
		453	}
		454
		455	/* called on EBADF to verify fds */
		456	static void
		457	fd_ebadf (EV_P)
		458	{
		459	int fd;
		460
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	if (!fd_valid (fd) == -1 && errno == EBADF)
		464	fd_kill (EV_A_ fd);
		465	}
		466
		467	/* called on ENOMEM in select/poll to kill some fds and retry */
		468	static void
		469	fd_enomem (EV_P)
		470	{
		471	int fd;
		472
		473	for (fd = anfdmax; fd--; )
		474	if (anfds [fd].events)
		475	{
		476	fd_kill (EV_A_ fd);
		477	return;
131	}	478	}
132	}	479	}
133		480
134	static struct ev_timer **timers;	481	/* usually called after fork if method needs to re-arm all fds from scratch */
135	static int timermax, timercnt;
136
137	static void	482	static void
138	upheap (int k)	483	fd_rearm_all (EV_P)
139	{	484	{
140	struct ev_timer *w = timers [k];	485	int fd;
141		486
		487	/* this should be highly optimised to not do anything but set a flag */
		488	for (fd = 0; fd < anfdmax; ++fd)
		489	if (anfds [fd].events)
		490	{
		491	anfds [fd].events = 0;
		492	fd_change (EV_A_ fd);
		493	}
		494	}
		495
		496	/*****************************************************************************/
		497
		498	static void
		499	upheap (WT *heap, int k)
		500	{
		501	WT w = heap [k];
		502
142	while (k && timers [k >> 1]->at > w->at)	503	while (k && heap [k >> 1]->at > w->at)
143	{	504	{
144	timers [k] = timers [k >> 1];	505	heap [k] = heap [k >> 1];
145	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
146	k >>= 1;	507	k >>= 1;
147	}	508	}
148		509
149	timers [k] = w;	510	heap [k] = w;
150	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
151		512
152	}	513	}
153		514
154	static void	515	static void
155	downheap (int k)	516	downheap (WT *heap, int N, int k)
156	{	517	{
157	struct ev_timer *w = timers [k];	518	WT w = heap [k];
158		519
159	while (k < (timercnt >> 1))	520	while (k < (N >> 1))
160	{	521	{
161	int j = k << 1;	522	int j = k << 1;
162		523
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	524	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164	++j;	525	++j;
165		526
166	if (w->at <= timers [j]->at)	527	if (w->at <= heap [j]->at)
167	break;	528	break;
168		529
169	timers [k] = timers [j];	530	heap [k] = heap [j];
170	timers [k]->active = k + 1;	531	((W)heap [k])->active = k + 1;
171	k = j;	532	k = j;
172	}	533	}
173		534
174	timers [k] = w;	535	heap [k] = w;
175	timers [k]->active = k + 1;	536	((W)heap [k])->active = k + 1;
176	}	537	}
177		538
178	static struct ev_signal **signals;	539	inline void
		540	adjustheap (WT *heap, int N, int k)
		541	{
		542	upheap (heap, k);
		543	downheap (heap, N, k);
		544	}
		545
		546	/*****************************************************************************/
		547
		548	typedef struct
		549	{
		550	WL head;
		551	sig_atomic_t volatile gotsig;
		552	} ANSIG;
		553
		554	static ANSIG *signals;
179	static int signalmax, signalcnt;	555	static int signalmax;
180		556
		557	static int sigpipe [2];
		558	static sig_atomic_t volatile gotsig;
		559	static struct ev_io sigev;
		560
181	static void	561	static void
182	signals_init (struct ev_signal **base, int count)	562	signals_init (ANSIG *base, int count)
183	{	563	{
184	while (count--)	564	while (count--)
185	*base++ = 0;	565	{
186	}	566	base->head = 0;
		567	base->gotsig = 0;
187		568
		569	++base;
		570	}
		571	}
		572
		573	static void
		574	sighandler (int signum)
		575	{
		576	#if WIN32
		577	signal (signum, sighandler);
		578	#endif
		579
		580	signals [signum - 1].gotsig = 1;
		581
		582	if (!gotsig)
		583	{
		584	int old_errno = errno;
		585	gotsig = 1;
		586	#ifdef WIN32
		587	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		588	#else
		589	write (sigpipe [1], &signum, 1);
		590	#endif
		591	errno = old_errno;
		592	}
		593	}
		594
		595	void
		596	ev_feed_signal_event (EV_P_ int signum)
		597	{
		598	WL w;
		599
		600	#if EV_MULTIPLICITY
		601	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		602	#endif
		603
		604	--signum;
		605
		606	if (signum < 0 || signum >= signalmax)
		607	return;
		608
		609	signals [signum].gotsig = 0;
		610
		611	for (w = signals [signum].head; w; w = w->next)
		612	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		613	}
		614
		615	static void
		616	sigcb (EV_P_ struct ev_io *iow, int revents)
		617	{
		618	int signum;
		619
		620	#ifdef WIN32
		621	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		622	#else
		623	read (sigpipe [0], &revents, 1);
		624	#endif
		625	gotsig = 0;
		626
		627	for (signum = signalmax; signum--; )
		628	if (signals [signum].gotsig)
		629	ev_feed_signal_event (EV_A_ signum + 1);
		630	}
		631
		632	static void
		633	siginit (EV_P)
		634	{
		635	#ifndef WIN32
		636	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		637	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		638
		639	/* rather than sort out wether we really need nb, set it */
		640	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		641	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		642	#endif
		643
		644	ev_io_set (&sigev, sigpipe [0], EV_READ);
		645	ev_io_start (EV_A_ &sigev);
		646	ev_unref (EV_A); /* child watcher should not keep loop alive */
		647	}
		648
		649	/*****************************************************************************/
		650
		651	static struct ev_child *childs [PID_HASHSIZE];
		652
		653	#ifndef WIN32
		654
		655	static struct ev_signal childev;
		656
		657	#ifndef WCONTINUED
		658	# define WCONTINUED 0
		659	#endif
		660
		661	static void
		662	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		663	{
		664	struct ev_child *w;
		665
		666	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		667	if (w->pid == pid || !w->pid)
		668	{
		669	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		670	w->rpid = pid;
		671	w->rstatus = status;
		672	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		673	}
		674	}
		675
		676	static void
		677	childcb (EV_P_ struct ev_signal *sw, int revents)
		678	{
		679	int pid, status;
		680
		681	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		682	{
		683	/* make sure we are called again until all childs have been reaped */
		684	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		685
		686	child_reap (EV_A_ sw, pid, pid, status);
		687	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		688	}
		689	}
		690
		691	#endif
		692
		693	/*****************************************************************************/
		694
		695	#if EV_USE_KQUEUE
		696	# include "ev_kqueue.c"
		697	#endif
188	#if HAVE_EPOLL	698	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	699	# include "ev_epoll.c"
190	#endif	700	#endif
		701	#if EV_USE_POLL
		702	# include "ev_poll.c"
		703	#endif
191	#if HAVE_SELECT	704	#if EV_USE_SELECT
192	# include "ev_select.c"	705	# include "ev_select.c"
193	#endif	706	#endif
194		707
195	int ev_init (int flags)	708	int
		709	ev_version_major (void)
196	{	710	{
		711	return EV_VERSION_MAJOR;
		712	}
		713
		714	int
		715	ev_version_minor (void)
		716	{
		717	return EV_VERSION_MINOR;
		718	}
		719
		720	/* return true if we are running with elevated privileges and should ignore env variables */
		721	static int
		722	enable_secure (void)
		723	{
		724	#ifdef WIN32
		725	return 0;
		726	#else
		727	return getuid () != geteuid ()
		728	|| getgid () != getegid ();
		729	#endif
		730	}
		731
		732	int
		733	ev_method (EV_P)
		734	{
		735	return method;
		736	}
		737
		738	static void
		739	loop_init (EV_P_ int methods)
		740	{
		741	if (!method)
		742	{
197	#if HAVE_MONOTONIC	743	#if EV_USE_MONOTONIC
198	{	744	{
199	struct timespec ts;	745	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	746	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	747	have_monotonic = 1;
202	}	748	}
203	#endif	749	#endif
204		750
205	ev_now = ev_time ();	751	ev_rt_now = ev_time ();
		752	mn_now = get_clock ();
		753	now_floor = mn_now;
		754	rtmn_diff = ev_rt_now - mn_now;
206		755
		756	if (methods == EVMETHOD_AUTO)
		757	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		758	methods = atoi (getenv ("LIBEV_METHODS"));
		759	else
		760	methods = EVMETHOD_ANY;
		761
		762	method = 0;
		763	#if EV_USE_WIN32
		764	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		765	#endif
		766	#if EV_USE_KQUEUE
		767	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		768	#endif
207	#if HAVE_EPOLL	769	#if EV_USE_EPOLL
208	if (epoll_init (flags))	770	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
209	return ev_method;
210	#endif	771	#endif
		772	#if EV_USE_POLL
		773	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		774	#endif
211	#if HAVE_SELECT	775	#if EV_USE_SELECT
212	if (select_init (flags))	776	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
213	return ev_method;
214	#endif	777	#endif
215		778
216	ev_method = EVMETHOD_NONE;	779	ev_init (&sigev, sigcb);
217	return ev_method;	780	ev_set_priority (&sigev, EV_MAXPRI);
		781	}
218	}	782	}
219		783
220	void ev_prefork (void)	784	void
221	{	785	loop_destroy (EV_P)
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void
236	call_pending ()
237	{	786	{
238	int i;	787	int i;
239		788
240	for (i = 0; i < pendingcnt; ++i)	789	#if EV_USE_WIN32
		790	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		794	#endif
		795	#if EV_USE_EPOLL
		796	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		797	#endif
		798	#if EV_USE_POLL
		799	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		800	#endif
		801	#if EV_USE_SELECT
		802	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		803	#endif
		804
		805	for (i = NUMPRI; i--; )
		806	array_free (pending, [i]);
		807
		808	/* have to use the microsoft-never-gets-it-right macro */
		809	array_free_microshit (fdchange);
		810	array_free_microshit (timer);
		811	#if EV_PERIODICS
		812	array_free_microshit (periodic);
		813	#endif
		814	array_free_microshit (idle);
		815	array_free_microshit (prepare);
		816	array_free_microshit (check);
		817
		818	method = 0;
		819	}
		820
		821	static void
		822	loop_fork (EV_P)
		823	{
		824	#if EV_USE_EPOLL
		825	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		826	#endif
		827	#if EV_USE_KQUEUE
		828	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		829	#endif
		830
		831	if (ev_is_active (&sigev))
		832	{
		833	/* default loop */
		834
		835	ev_ref (EV_A);
		836	ev_io_stop (EV_A_ &sigev);
		837	close (sigpipe [0]);
		838	close (sigpipe [1]);
		839
		840	while (pipe (sigpipe))
		841	syserr ("(libev) error creating pipe");
		842
		843	siginit (EV_A);
241	{	844	}
242	ANPENDING *p = pendings + i;
243		845
244	if (p->w)	846	postfork = 0;
		847	}
		848
		849	#if EV_MULTIPLICITY
		850	struct ev_loop *
		851	ev_loop_new (int methods)
		852	{
		853	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		854
		855	memset (loop, 0, sizeof (struct ev_loop));
		856
		857	loop_init (EV_A_ methods);
		858
		859	if (ev_method (EV_A))
		860	return loop;
		861
		862	return 0;
		863	}
		864
		865	void
		866	ev_loop_destroy (EV_P)
		867	{
		868	loop_destroy (EV_A);
		869	ev_free (loop);
		870	}
		871
		872	void
		873	ev_loop_fork (EV_P)
		874	{
		875	postfork = 1;
		876	}
		877
		878	#endif
		879
		880	#if EV_MULTIPLICITY
		881	struct ev_loop *
		882	#else
		883	int
		884	#endif
		885	ev_default_loop (int methods)
		886	{
		887	if (sigpipe [0] == sigpipe [1])
		888	if (pipe (sigpipe))
		889	return 0;
		890
		891	if (!default_loop)
		892	{
		893	#if EV_MULTIPLICITY
		894	struct ev_loop *loop = default_loop = &default_loop_struct;
		895	#else
		896	default_loop = 1;
		897	#endif
		898
		899	loop_init (EV_A_ methods);
		900
		901	if (ev_method (EV_A))
245	{	902	{
246	p->w->pending = 0;	903	siginit (EV_A);
247	p->w->cb (p->w, p->events);	904
		905	#ifndef WIN32
		906	ev_signal_init (&childev, childcb, SIGCHLD);
		907	ev_set_priority (&childev, EV_MAXPRI);
		908	ev_signal_start (EV_A_ &childev);
		909	ev_unref (EV_A); /* child watcher should not keep loop alive */
		910	#endif
248	}	911	}
		912	else
		913	default_loop = 0;
		914	}
		915
		916	return default_loop;
		917	}
		918
		919	void
		920	ev_default_destroy (void)
		921	{
		922	#if EV_MULTIPLICITY
		923	struct ev_loop *loop = default_loop;
		924	#endif
		925
		926	#ifndef WIN32
		927	ev_ref (EV_A); /* child watcher */
		928	ev_signal_stop (EV_A_ &childev);
		929	#endif
		930
		931	ev_ref (EV_A); /* signal watcher */
		932	ev_io_stop (EV_A_ &sigev);
		933
		934	close (sigpipe [0]); sigpipe [0] = 0;
		935	close (sigpipe [1]); sigpipe [1] = 0;
		936
		937	loop_destroy (EV_A);
		938	}
		939
		940	void
		941	ev_default_fork (void)
		942	{
		943	#if EV_MULTIPLICITY
		944	struct ev_loop *loop = default_loop;
		945	#endif
		946
		947	if (method)
		948	postfork = 1;
		949	}
		950
		951	/*****************************************************************************/
		952
		953	static int
		954	any_pending (EV_P)
		955	{
		956	int pri;
		957
		958	for (pri = NUMPRI; pri--; )
		959	if (pendingcnt [pri])
		960	return 1;
		961
		962	return 0;
		963	}
		964
		965	static void
		966	call_pending (EV_P)
		967	{
		968	int pri;
		969
		970	for (pri = NUMPRI; pri--; )
		971	while (pendingcnt [pri])
		972	{
		973	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		974
		975	if (p->w)
		976	{
		977	p->w->pending = 0;
		978	EV_CB_INVOKE (p->w, p->events);
		979	}
249	}	980	}
250
251	pendingcnt = 0;
252	}	981	}
253		982
254	static void	983	static void
255	timer_reify (void)	984	timers_reify (EV_P)
256	{	985	{
257	while (timercnt && timers [0]->at <= ev_now)	986	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	987	{
259	struct ev_timer *w = timers [0];	988	struct ev_timer *w = timers [0];
260		989
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	990	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		991
262	/* first reschedule timer */	992	/* first reschedule or stop timer */
263	if (w->repeat)	993	if (w->repeat)
264	{	994	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	995	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)	996
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	997	((WT)w)->at += w->repeat;
		998	if (((WT)w)->at < mn_now)
		999	((WT)w)->at = mn_now;
270		1000
271	fprintf (stderr, "b %f\n", w->at);//D	1001	downheap ((WT *)timers, timercnt, 0);
272
273	downheap (0);
274	}	1002	}
275	else	1003	else
		1004	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1005
		1006	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1007	}
		1008	}
		1009
		1010	#if EV_PERIODICS
		1011	static void
		1012	periodics_reify (EV_P)
		1013	{
		1014	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1015	{
		1016	struct ev_periodic *w = periodics [0];
		1017
		1018	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1019
		1020	/* first reschedule or stop timer */
		1021	if (w->reschedule_cb)
276	{	1022	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	1023	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
278	evtimer_stop (w); /* nonrepeating: stop timer */	1024
		1025	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1026	downheap ((WT *)periodics, periodiccnt, 0);
279	}	1027	}
		1028	else if (w->interval)
		1029	{
		1030	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1031	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1032	downheap ((WT *)periodics, periodiccnt, 0);
		1033	}
		1034	else
		1035	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		1036
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	1037	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1038	}
		1039	}
		1040
		1041	static void
		1042	periodics_reschedule (EV_P)
		1043	{
		1044	int i;
		1045
		1046	/* adjust periodics after time jump */
		1047	for (i = 0; i < periodiccnt; ++i)
282	}	1048	{
283	}	1049	struct ev_periodic *w = periodics [i];
284		1050
285	int ev_loop_done;	1051	if (w->reschedule_cb)
		1052	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1053	else if (w->interval)
		1054	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1055	}
286		1056
		1057	/* now rebuild the heap */
		1058	for (i = periodiccnt >> 1; i--; )
		1059	downheap ((WT *)periodics, periodiccnt, i);
		1060	}
		1061	#endif
		1062
		1063	inline int
		1064	time_update_monotonic (EV_P)
		1065	{
		1066	mn_now = get_clock ();
		1067
		1068	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1069	{
		1070	ev_rt_now = rtmn_diff + mn_now;
		1071	return 0;
		1072	}
		1073	else
		1074	{
		1075	now_floor = mn_now;
		1076	ev_rt_now = ev_time ();
		1077	return 1;
		1078	}
		1079	}
		1080
		1081	static void
		1082	time_update (EV_P)
		1083	{
		1084	int i;
		1085
		1086	#if EV_USE_MONOTONIC
		1087	if (expect_true (have_monotonic))
		1088	{
		1089	if (time_update_monotonic (EV_A))
		1090	{
		1091	ev_tstamp odiff = rtmn_diff;
		1092
		1093	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1094	{
		1095	rtmn_diff = ev_rt_now - mn_now;
		1096
		1097	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1098	return; /* all is well */
		1099
		1100	ev_rt_now = ev_time ();
		1101	mn_now = get_clock ();
		1102	now_floor = mn_now;
		1103	}
		1104
		1105	# if EV_PERIODICS
		1106	periodics_reschedule (EV_A);
		1107	# endif
		1108	/* no timer adjustment, as the monotonic clock doesn't jump */
		1109	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1110	}
		1111	}
		1112	else
		1113	#endif
		1114	{
		1115	ev_rt_now = ev_time ();
		1116
		1117	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1118	{
		1119	#if EV_PERIODICS
		1120	periodics_reschedule (EV_A);
		1121	#endif
		1122
		1123	/* adjust timers. this is easy, as the offset is the same for all */
		1124	for (i = 0; i < timercnt; ++i)
		1125	((WT)timers [i])->at += ev_rt_now - mn_now;
		1126	}
		1127
		1128	mn_now = ev_rt_now;
		1129	}
		1130	}
		1131
		1132	void
		1133	ev_ref (EV_P)
		1134	{
		1135	++activecnt;
		1136	}
		1137
		1138	void
		1139	ev_unref (EV_P)
		1140	{
		1141	--activecnt;
		1142	}
		1143
		1144	static int loop_done;
		1145
		1146	void
287	int ev_loop (int flags)	1147	ev_loop (EV_P_ int flags)
288	{	1148	{
289	double block;	1149	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	1150	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
291		1151
292	do	1152	do
293	{	1153	{
		1154	/* queue check watchers (and execute them) */
		1155	if (expect_false (preparecnt))
		1156	{
		1157	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1158	call_pending (EV_A);
		1159	}
		1160
		1161	/* we might have forked, so reify kernel state if necessary */
		1162	if (expect_false (postfork))
		1163	loop_fork (EV_A);
		1164
294	/* update fd-related kernel structures */	1165	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	1166	fd_reify (EV_A);
296		1167
297	/* calculate blocking time */	1168	/* calculate blocking time */
		1169
		1170	/* we only need this for !monotonic clock or timers, but as we basically
		1171	always have timers, we just calculate it always */
		1172	#if EV_USE_MONOTONIC
		1173	if (expect_true (have_monotonic))
		1174	time_update_monotonic (EV_A);
		1175	else
		1176	#endif
		1177	{
298	ev_now = ev_time ();	1178	ev_rt_now = ev_time ();
		1179	mn_now = ev_rt_now;
		1180	}
299		1181
300	if (flags & EVLOOP_NONBLOCK)	1182	if (flags & EVLOOP_NONBLOCK || idlecnt)
301	block = 0.;	1183	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	1184	else
305	{	1185	{
		1186	block = MAX_BLOCKTIME;
		1187
		1188	if (timercnt)
		1189	{
306	block = timers [0]->at - ev_now + method_fudge;	1190	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1191	if (block > to) block = to;
		1192	}
		1193
		1194	#if EV_PERIODICS
		1195	if (periodiccnt)
		1196	{
		1197	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
		1198	if (block > to) block = to;
		1199	}
		1200	#endif
		1201
307	if (block < 0.) block = 0.;	1202	if (block < 0.) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	1203	}
310		1204
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	1205	method_poll (EV_A_ block);
313		1206
		1207	/* update ev_rt_now, do magic */
		1208	time_update (EV_A);
		1209
314	/* put pending timers into pendign queue and reschedule them */	1210	/* queue pending timers and reschedule them */
315	timer_reify ();	1211	timers_reify (EV_A); /* relative timers called last */
		1212	#if EV_PERIODICS
		1213	periodics_reify (EV_A); /* absolute timers called first */
		1214	#endif
316		1215
317	ev_now = ev_time ();	1216	/* queue idle watchers unless io or timers are pending */
		1217	if (idlecnt && !any_pending (EV_A))
		1218	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1219
		1220	/* queue check watchers, to be executed first */
		1221	if (checkcnt)
		1222	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1223
318	call_pending ();	1224	call_pending (EV_A);
319	}	1225	}
320	while (!ev_loop_done);	1226	while (activecnt && !loop_done);
321	}
322		1227
323	static void	1228	if (loop_done != 2)
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1229	loop_done = 0;
		1230	}
		1231
		1232	void
		1233	ev_unloop (EV_P_ int how)
		1234	{
		1235	loop_done = how;
		1236	}
		1237
		1238	/*****************************************************************************/
		1239
		1240	inline void
		1241	wlist_add (WL *head, WL elem)
325	{	1242	{
326	elem->next = *head;	1243	elem->next = *head;
327	*head = elem;	1244	*head = elem;
328	}	1245	}
329		1246
330	static void	1247	inline void
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1248	wlist_del (WL *head, WL elem)
332	{	1249	{
333	while (*head)	1250	while (*head)
334	{	1251	{
335	if (*head == elem)	1252	if (*head == elem)
336	{	1253	{
…		…
340		1257
341	head = &(*head)->next;	1258	head = &(*head)->next;
342	}	1259	}
343	}	1260	}
344		1261
345	static void	1262	inline void
346	ev_start (struct ev_watcher *w, int active)	1263	ev_clear_pending (EV_P_ W w)
347	{	1264	{
		1265	if (w->pending)
		1266	{
		1267	pendings [ABSPRI (w)][w->pending - 1].w = 0;
348	w->pending = 0;	1268	w->pending = 0;
		1269	}
		1270	}
		1271
		1272	inline void
		1273	ev_start (EV_P_ W w, int active)
		1274	{
		1275	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1276	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1277
349	w->active = active;	1278	w->active = active;
		1279	ev_ref (EV_A);
350	}	1280	}
351		1281
352	static void	1282	inline void
353	ev_stop (struct ev_watcher *w)	1283	ev_stop (EV_P_ W w)
354	{	1284	{
355	if (w->pending)	1285	ev_unref (EV_A);
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	1286	w->active = 0;
359	/* nop */
360	}	1287	}
361		1288
		1289	/*****************************************************************************/
		1290
362	void	1291	void
363	evio_start (struct ev_io *w)	1292	ev_io_start (EV_P_ struct ev_io *w)
364	{	1293	{
		1294	int fd = w->fd;
		1295
365	if (ev_is_active (w))	1296	if (ev_is_active (w))
366	return;	1297	return;
367		1298
368	int fd = w->fd;	1299	assert (("ev_io_start called with negative fd", fd >= 0));
369		1300
370	ev_start ((struct ev_watcher *)w, 1);	1301	ev_start (EV_A_ (W)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1302	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1303	wlist_add ((WL *)&anfds[fd].head, (WL)w);
373		1304
374	++fdchangecnt;	1305	fd_change (EV_A_ fd);
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}	1306	}
378		1307
379	void	1308	void
380	evio_stop (struct ev_io *w)	1309	ev_io_stop (EV_P_ struct ev_io *w)
381	{	1310	{
		1311	ev_clear_pending (EV_A_ (W)w);
382	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
383	return;	1313	return;
384		1314
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1315	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
386	ev_stop ((struct ev_watcher *)w);
387		1316
388	++fdchangecnt;	1317	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1318	ev_stop (EV_A_ (W)w);
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}
392		1319
		1320	fd_change (EV_A_ w->fd);
		1321	}
		1322
393	void	1323	void
394	evtimer_start (struct ev_timer *w)	1324	ev_timer_start (EV_P_ struct ev_timer *w)
395	{	1325	{
396	if (ev_is_active (w))	1326	if (ev_is_active (w))
397	return;	1327	return;
398		1328
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1329	((WT)w)->at += mn_now;
400	if (w->is_abs)	1330
		1331	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1332
		1333	ev_start (EV_A_ (W)w, ++timercnt);
		1334	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1335	timers [timercnt - 1] = w;
		1336	upheap ((WT *)timers, timercnt - 1);
		1337
		1338	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1339	}
		1340
		1341	void
		1342	ev_timer_stop (EV_P_ struct ev_timer *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (!ev_is_active (w))
		1346	return;
		1347
		1348	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1349
		1350	if (((W)w)->active < timercnt--)
		1351	{
		1352	timers [((W)w)->active - 1] = timers [timercnt];
		1353	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
401	{	1354	}
402	/* this formula differs from the one in timer_reify becuse we do not round up */	1355
		1356	((WT)w)->at -= mn_now;
		1357
		1358	ev_stop (EV_A_ (W)w);
		1359	}
		1360
		1361	void
		1362	ev_timer_again (EV_P_ struct ev_timer *w)
		1363	{
		1364	if (ev_is_active (w))
		1365	{
403	if (w->repeat)	1366	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1367	{
		1368	((WT)w)->at = mn_now + w->repeat;
		1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1370	}
		1371	else
		1372	ev_timer_stop (EV_A_ w);
		1373	}
		1374	else if (w->repeat)
		1375	ev_timer_start (EV_A_ w);
		1376	}
		1377
		1378	#if EV_PERIODICS
		1379	void
		1380	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1381	{
		1382	if (ev_is_active (w))
		1383	return;
		1384
		1385	if (w->reschedule_cb)
		1386	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1387	else if (w->interval)
405	}	1388	{
		1389	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1390	/* this formula differs from the one in periodic_reify because we do not always round up */
		1391	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1392	}
		1393
		1394	ev_start (EV_A_ (W)w, ++periodiccnt);
		1395	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1396	periodics [periodiccnt - 1] = w;
		1397	upheap ((WT *)periodics, periodiccnt - 1);
		1398
		1399	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1400	}
		1401
		1402	void
		1403	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1404	{
		1405	ev_clear_pending (EV_A_ (W)w);
		1406	if (!ev_is_active (w))
		1407	return;
		1408
		1409	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1410
		1411	if (((W)w)->active < periodiccnt--)
		1412	{
		1413	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1414	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1415	}
		1416
		1417	ev_stop (EV_A_ (W)w);
		1418	}
		1419
		1420	void
		1421	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1422	{
		1423	/* TODO: use adjustheap and recalculation */
		1424	ev_periodic_stop (EV_A_ w);
		1425	ev_periodic_start (EV_A_ w);
		1426	}
		1427	#endif
		1428
		1429	void
		1430	ev_idle_start (EV_P_ struct ev_idle *w)
		1431	{
		1432	if (ev_is_active (w))
		1433	return;
		1434
		1435	ev_start (EV_A_ (W)w, ++idlecnt);
		1436	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1437	idles [idlecnt - 1] = w;
		1438	}
		1439
		1440	void
		1441	ev_idle_stop (EV_P_ struct ev_idle *w)
		1442	{
		1443	ev_clear_pending (EV_A_ (W)w);
		1444	if (!ev_is_active (w))
		1445	return;
		1446
		1447	idles [((W)w)->active - 1] = idles [--idlecnt];
		1448	ev_stop (EV_A_ (W)w);
		1449	}
		1450
		1451	void
		1452	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1453	{
		1454	if (ev_is_active (w))
		1455	return;
		1456
		1457	ev_start (EV_A_ (W)w, ++preparecnt);
		1458	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1459	prepares [preparecnt - 1] = w;
		1460	}
		1461
		1462	void
		1463	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1464	{
		1465	ev_clear_pending (EV_A_ (W)w);
		1466	if (!ev_is_active (w))
		1467	return;
		1468
		1469	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1470	ev_stop (EV_A_ (W)w);
		1471	}
		1472
		1473	void
		1474	ev_check_start (EV_P_ struct ev_check *w)
		1475	{
		1476	if (ev_is_active (w))
		1477	return;
		1478
		1479	ev_start (EV_A_ (W)w, ++checkcnt);
		1480	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1481	checks [checkcnt - 1] = w;
		1482	}
		1483
		1484	void
		1485	ev_check_stop (EV_P_ struct ev_check *w)
		1486	{
		1487	ev_clear_pending (EV_A_ (W)w);
		1488	if (!ev_is_active (w))
		1489	return;
		1490
		1491	checks [((W)w)->active - 1] = checks [--checkcnt];
		1492	ev_stop (EV_A_ (W)w);
		1493	}
		1494
		1495	#ifndef SA_RESTART
		1496	# define SA_RESTART 0
		1497	#endif
		1498
		1499	void
		1500	ev_signal_start (EV_P_ struct ev_signal *w)
		1501	{
		1502	#if EV_MULTIPLICITY
		1503	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1504	#endif
		1505	if (ev_is_active (w))
		1506	return;
		1507
		1508	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1509
		1510	ev_start (EV_A_ (W)w, 1);
		1511	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1512	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1513
		1514	if (!((WL)w)->next)
		1515	{
		1516	#if WIN32
		1517	signal (w->signum, sighandler);
		1518	#else
		1519	struct sigaction sa;
		1520	sa.sa_handler = sighandler;
		1521	sigfillset (&sa.sa_mask);
		1522	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1523	sigaction (w->signum, &sa, 0);
		1524	#endif
		1525	}
		1526	}
		1527
		1528	void
		1529	ev_signal_stop (EV_P_ struct ev_signal *w)
		1530	{
		1531	ev_clear_pending (EV_A_ (W)w);
		1532	if (!ev_is_active (w))
		1533	return;
		1534
		1535	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1536	ev_stop (EV_A_ (W)w);
		1537
		1538	if (!signals [w->signum - 1].head)
		1539	signal (w->signum, SIG_DFL);
		1540	}
		1541
		1542	void
		1543	ev_child_start (EV_P_ struct ev_child *w)
		1544	{
		1545	#if EV_MULTIPLICITY
		1546	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1547	#endif
		1548	if (ev_is_active (w))
		1549	return;
		1550
		1551	ev_start (EV_A_ (W)w, 1);
		1552	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1553	}
		1554
		1555	void
		1556	ev_child_stop (EV_P_ struct ev_child *w)
		1557	{
		1558	ev_clear_pending (EV_A_ (W)w);
		1559	if (!ev_is_active (w))
		1560	return;
		1561
		1562	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1563	ev_stop (EV_A_ (W)w);
		1564	}
		1565
		1566	/*****************************************************************************/
		1567
		1568	struct ev_once
		1569	{
		1570	struct ev_io io;
		1571	struct ev_timer to;
		1572	void (*cb)(int revents, void *arg);
		1573	void *arg;
		1574	};
		1575
		1576	static void
		1577	once_cb (EV_P_ struct ev_once *once, int revents)
		1578	{
		1579	void (*cb)(int revents, void *arg) = once->cb;
		1580	void *arg = once->arg;
		1581
		1582	ev_io_stop (EV_A_ &once->io);
		1583	ev_timer_stop (EV_A_ &once->to);
		1584	ev_free (once);
		1585
		1586	cb (revents, arg);
		1587	}
		1588
		1589	static void
		1590	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1591	{
		1592	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1593	}
		1594
		1595	static void
		1596	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1597	{
		1598	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1599	}
		1600
		1601	void
		1602	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1603	{
		1604	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
		1605
		1606	if (!once)
		1607	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
406	else	1608	else
407	w->at += ev_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409
410	ev_start ((struct ev_watcher *)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);
414	}
415
416	void
417	evtimer_stop (struct ev_timer *w)
418	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D
420	if (!ev_is_active (w))
421	return;
422
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D
424	if (w->active < timercnt)
425	{
426	timers [w->active - 1] = timers [--timercnt];
427	downheap (w->active - 1);
428	}	1609	{
		1610	once->cb = cb;
		1611	once->arg = arg;
429		1612
430	ev_stop ((struct ev_watcher *)w);	1613	ev_init (&once->io, once_cb_io);
431	}	1614	if (fd >= 0)
		1615	{
		1616	ev_io_set (&once->io, fd, events);
		1617	ev_io_start (EV_A_ &once->io);
		1618	}
432		1619
433	void	1620	ev_init (&once->to, once_cb_to);
434	evsignal_start (struct ev_signal *w)	1621	if (timeout >= 0.)
435	{	1622	{
436	if (ev_is_active (w))	1623	ev_timer_set (&once->to, timeout, 0.);
437	return;	1624	ev_timer_start (EV_A_ &once->to);
438		1625	}
439	ev_start ((struct ev_watcher *)w, 1);
440	array_needsize (signals, signalmax, w->signum, signals_init);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
442	}
443
444	void
445	evsignal_stop (struct ev_signal *w)
446	{
447	if (!ev_is_active (w))
448	return;
449
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
451	ev_stop ((struct ev_watcher *)w);
452	}
453
454	/*****************************************************************************/
455	#if 1
456
457	static void
458	sin_cb (struct ev_io *w, int revents)
459	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
461	}
462
463	static void
464	ocb (struct ev_timer *w, int revents)
465	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
467	}
468
469	int main (void)
470	{
471	struct ev_io sin;
472
473	ev_init (0);
474
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);
477	evio_start (&sin);
478
479	struct ev_timer t[1000];
480
481	int i;
482	for (i = 0; i < 1000; ++i)
483	{	1626	}
484	struct ev_timer *w = t + i;
485	evw_init (w, ocb, i);
486	evtimer_set_rel (w, drand48 (), 0);
487	evtimer_start (w);
488	if (drand48 () < 0.5)
489	evtimer_stop (w);
490	}
491
492	ev_loop (0);
493
494	return 0;
495	}	1627	}
496		1628
		1629	#ifdef __cplusplus
		1630	}
497	#endif	1631	#endif
498		1632
499
500
501

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