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Comparing libev/ev.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.88 by root, Sat Nov 10 04:40:27 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	# define EV_USE_MONOTONIC 1
		41	# define EV_USE_REALTIME 1
		42	# endif
		43
		44	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		45	# define EV_USE_SELECT 1
		46	# endif
		47
		48	# if HAVE_POLL && HAVE_POLL_H
		49	# define EV_USE_POLL 1
		50	# endif
		51
		52	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		53	# define EV_USE_EPOLL 1
		54	# endif
		55
		56	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		57	# define EV_USE_KQUEUE 1
		58	# endif
		59
		60	#endif
		61
1	#include <math.h>	62	#include <math.h>
2	#include <stdlib.h>	63	#include <stdlib.h>
		64	#include <fcntl.h>
		65	#include <stddef.h>
3		66
4	#include <stdio.h>	67	#include <stdio.h>
5		68
		69	#include <assert.h>
6	#include <errno.h>	70	#include <errno.h>
7	#include <sys/time.h>	71	#include <sys/types.h>
8	#include <time.h>	72	#include <time.h>
9		73
		74	#include <signal.h>
		75
		76	#ifndef WIN32
		77	# include <unistd.h>
		78	# include <sys/time.h>
		79	# include <sys/wait.h>
		80	#endif
		81	/**/
		82
		83	#ifndef EV_USE_MONOTONIC
		84	# define EV_USE_MONOTONIC 1
		85	#endif
		86
		87	#ifndef EV_USE_SELECT
		88	# define EV_USE_SELECT 1
		89	#endif
		90
		91	#ifndef EV_USE_POLL
		92	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		93	#endif
		94
		95	#ifndef EV_USE_EPOLL
		96	# define EV_USE_EPOLL 0
		97	#endif
		98
		99	#ifndef EV_USE_KQUEUE
		100	# define EV_USE_KQUEUE 0
		101	#endif
		102
		103	#ifndef EV_USE_WIN32
		104	# ifdef WIN32
		105	# define EV_USE_WIN32 0 /* it does not exist, use select */
		106	# undef EV_USE_SELECT
		107	# define EV_USE_SELECT 1
		108	# else
		109	# define EV_USE_WIN32 0
		110	# endif
		111	#endif
		112
		113	#ifndef EV_USE_REALTIME
		114	# define EV_USE_REALTIME 1
		115	#endif
		116
		117	/**/
		118
10	#ifdef CLOCK_MONOTONIC	119	#ifndef CLOCK_MONOTONIC
		120	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	121	# define EV_USE_MONOTONIC 0
12	#endif	122	#endif
13		123
14	#define HAVE_EPOLL 1	124	#ifndef CLOCK_REALTIME
		125	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	126	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	127	#endif
17		128
18	#define MAX_BLOCKTIME 60.	129	/**/
19		130
		131	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		132	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		133	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		134	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
		135
		136	#ifdef EV_H
		137	# include EV_H
		138	#else
20	#include "ev.h"	139	# include "ev.h"
		140	#endif
21		141
		142	#if __GNUC__ >= 3
		143	# define expect(expr,value) __builtin_expect ((expr),(value))
		144	# define inline inline
		145	#else
		146	# define expect(expr,value) (expr)
		147	# define inline static
		148	#endif
		149
		150	#define expect_false(expr) expect ((expr) != 0, 0)
		151	#define expect_true(expr) expect ((expr) != 0, 1)
		152
		153	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		154	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		155
22	struct ev_watcher {	156	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	157	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	158	typedef struct ev_watcher_time *WT;
28	};
29		159
		160	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		161
		162	#include "ev_win32.c"
		163
		164	/*****************************************************************************/
		165
		166	static void (*syserr_cb)(const char *msg);
		167
		168	void ev_set_syserr_cb (void (*cb)(const char *msg))
		169	{
		170	syserr_cb = cb;
		171	}
		172
		173	static void
		174	syserr (const char *msg)
		175	{
		176	if (!msg)
		177	msg = "(libev) system error";
		178
		179	if (syserr_cb)
		180	syserr_cb (msg);
		181	else
		182	{
		183	perror (msg);
		184	abort ();
		185	}
		186	}
		187
		188	static void *(*alloc)(void *ptr, long size);
		189
		190	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		191	{
		192	alloc = cb;
		193	}
		194
		195	static void *
		196	ev_realloc (void *ptr, long size)
		197	{
		198	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		199
		200	if (!ptr && size)
		201	{
		202	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		203	abort ();
		204	}
		205
		206	return ptr;
		207	}
		208
		209	#define ev_malloc(size) ev_realloc (0, (size))
		210	#define ev_free(ptr) ev_realloc ((ptr), 0)
		211
		212	/*****************************************************************************/
		213
		214	typedef struct
		215	{
		216	WL head;
		217	unsigned char events;
		218	unsigned char reify;
		219	} ANFD;
		220
		221	typedef struct
		222	{
		223	W w;
		224	int events;
		225	} ANPENDING;
		226
		227	#if EV_MULTIPLICITY
		228
		229	struct ev_loop
		230	{
		231	ev_tstamp ev_rt_now;
		232	#define VAR(name,decl) decl;
		233	#include "ev_vars.h"
		234	#undef VAR
		235	};
		236	#include "ev_wrap.h"
		237
		238	struct ev_loop default_loop_struct;
		239	static struct ev_loop *default_loop;
		240
		241	#else
		242
30	ev_tstamp ev_now;	243	ev_tstamp ev_rt_now;
31	int ev_method;	244	#define VAR(name,decl) static decl;
		245	#include "ev_vars.h"
		246	#undef VAR
32		247
33	static int have_monotonic; /* runtime */	248	static int default_loop;
34		249
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	250	#endif
36	static void (*method_reify)(void);
37	static void (*method_poll)(ev_tstamp timeout);
38		251
39	ev_tstamp	252	/*****************************************************************************/
		253
		254	inline ev_tstamp
40	ev_time (void)	255	ev_time (void)
41	{	256	{
42	#if HAVE_REALTIME	257	#if EV_USE_REALTIME
43	struct timespec ts;	258	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	259	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	261	#else
47	struct timeval tv;	262	struct timeval tv;
48	gettimeofday (&tv, 0);	263	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	264	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	265	#endif
51	}	266	}
52		267
53	static ev_tstamp	268	inline ev_tstamp
54	get_clock (void)	269	get_clock (void)
55	{	270	{
56	#if HAVE_MONOTONIC	271	#if EV_USE_MONOTONIC
57	if (have_monotonic)	272	if (expect_true (have_monotonic))
58	{	273	{
59	struct timespec ts;	274	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	275	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	276	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	277	}
63	#endif	278	#endif
64		279
65	return ev_time ();	280	return ev_time ();
66	}	281	}
67		282
		283	#if EV_MULTIPLICITY
		284	ev_tstamp
		285	ev_now (EV_P)
		286	{
		287	return ev_rt_now;
		288	}
		289	#endif
		290
		291	#define array_roundsize(type,n) ((n) | 4 & ~3)
		292
68	#define array_needsize(base,cur,cnt,init) \	293	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	294	if (expect_false ((cnt) > cur)) \
70	{ \	295	{ \
71	int newcnt = cur; \	296	int newcnt = cur; \
72	do \	297	do \
73	{ \	298	{ \
74	newcnt += (newcnt >> 1) + 16; \	299	newcnt = array_roundsize (type, newcnt << 1); \
75	} \	300	} \
76	while ((cnt) > newcnt); \	301	while ((cnt) > newcnt); \
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	302	\
78	base = realloc (base, sizeof (*base) * (newcnt)); \	303	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
79	init (base + cur, newcnt - cur); \	304	init (base + cur, newcnt - cur); \
80	cur = newcnt; \	305	cur = newcnt; \
81	}	306	}
82		307
83	typedef struct	308	#define array_slim(type,stem) \
84	{	309	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
85	struct ev_io *head;	310	{ \
86	unsigned char wev, rev; /* want, received event set */	311	stem ## max = array_roundsize (stem ## cnt >> 1); \
87	} ANFD;	312	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		313	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		314	}
88		315
89	static ANFD *anfds;	316	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
90	static int anfdmax;	317	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		318	#define array_free_microshit(stem) \
		319	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
91		320
92	static int *fdchanges;	321	#define array_free(stem, idx) \
93	static int fdchangemax, fdchangecnt;	322	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		323
		324	/*****************************************************************************/
94		325
95	static void	326	static void
96	anfds_init (ANFD *base, int count)	327	anfds_init (ANFD *base, int count)
97	{	328	{
98	while (count--)	329	while (count--)
99	{	330	{
100	base->head = 0;	331	base->head = 0;
101	base->wev = base->rev = EV_NONE;	332	base->events = EV_NONE;
		333	base->reify = 0;
		334
102	++base;	335	++base;
103	}	336	}
104	}	337	}
105		338
106	typedef struct	339	void
		340	ev_feed_event (EV_P_ void *w, int revents)
107	{	341	{
108	struct ev_watcher *w;	342	W w_ = (W)w;
109	int events;
110	} ANPENDING;
111		343
112	static ANPENDING *pendings;	344	if (w_->pending)
113	static int pendingmax, pendingcnt;	345	{
		346	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		347	return;
		348	}
114		349
115	static void
116	event (struct ev_watcher *w, int events)
117	{
118	w->pending = ++pendingcnt;	350	w_->pending = ++pendingcnt [ABSPRI (w_)];
119	array_needsize (pendings, pendingmax, pendingcnt, );	351	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
120	pendings [pendingcnt - 1].w = w;	352	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
121	pendings [pendingcnt - 1].events = events;	353	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
122	}	354	}
123		355
124	static void	356	static void
		357	queue_events (EV_P_ W *events, int eventcnt, int type)
		358	{
		359	int i;
		360
		361	for (i = 0; i < eventcnt; ++i)
		362	ev_feed_event (EV_A_ events [i], type);
		363	}
		364
		365	inline void
125	fd_event (int fd, int events)	366	fd_event (EV_P_ int fd, int revents)
126	{	367	{
127	ANFD *anfd = anfds + fd;	368	ANFD *anfd = anfds + fd;
128	struct ev_io *w;	369	struct ev_io *w;
129		370
130	for (w = anfd->head; w; w = w->next)	371	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
131	{	372	{
132	int ev = w->events & events;	373	int ev = w->events & revents;
133		374
134	if (ev)	375	if (ev)
135	event ((struct ev_watcher *)w, ev);	376	ev_feed_event (EV_A_ (W)w, ev);
		377	}
		378	}
		379
		380	void
		381	ev_feed_fd_event (EV_P_ int fd, int revents)
		382	{
		383	fd_event (EV_A_ fd, revents);
		384	}
		385
		386	/*****************************************************************************/
		387
		388	static void
		389	fd_reify (EV_P)
		390	{
		391	int i;
		392
		393	for (i = 0; i < fdchangecnt; ++i)
		394	{
		395	int fd = fdchanges [i];
		396	ANFD *anfd = anfds + fd;
		397	struct ev_io *w;
		398
		399	int events = 0;
		400
		401	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		402	events |= w->events;
		403
		404	anfd->reify = 0;
		405
		406	method_modify (EV_A_ fd, anfd->events, events);
		407	anfd->events = events;
		408	}
		409
		410	fdchangecnt = 0;
		411	}
		412
		413	static void
		414	fd_change (EV_P_ int fd)
		415	{
		416	if (anfds [fd].reify)
		417	return;
		418
		419	anfds [fd].reify = 1;
		420
		421	++fdchangecnt;
		422	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		423	fdchanges [fdchangecnt - 1] = fd;
		424	}
		425
		426	static void
		427	fd_kill (EV_P_ int fd)
		428	{
		429	struct ev_io *w;
		430
		431	while ((w = (struct ev_io *)anfds [fd].head))
		432	{
		433	ev_io_stop (EV_A_ w);
		434	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		435	}
		436	}
		437
		438	static int
		439	fd_valid (int fd)
		440	{
		441	#ifdef WIN32
		442	return !!win32_get_osfhandle (fd);
		443	#else
		444	return fcntl (fd, F_GETFD) != -1;
		445	#endif
		446	}
		447
		448	/* called on EBADF to verify fds */
		449	static void
		450	fd_ebadf (EV_P)
		451	{
		452	int fd;
		453
		454	for (fd = 0; fd < anfdmax; ++fd)
		455	if (anfds [fd].events)
		456	if (!fd_valid (fd) == -1 && errno == EBADF)
		457	fd_kill (EV_A_ fd);
		458	}
		459
		460	/* called on ENOMEM in select/poll to kill some fds and retry */
		461	static void
		462	fd_enomem (EV_P)
		463	{
		464	int fd;
		465
		466	for (fd = anfdmax; fd--; )
		467	if (anfds [fd].events)
		468	{
		469	fd_kill (EV_A_ fd);
		470	return;
136	}	471	}
137	}	472	}
138		473
139	static struct ev_timer **timers;	474	/* usually called after fork if method needs to re-arm all fds from scratch */
140	static int timermax, timercnt;
141
142	static void	475	static void
143	upheap (int k)	476	fd_rearm_all (EV_P)
144	{	477	{
145	struct ev_timer *w = timers [k];	478	int fd;
146		479
		480	/* this should be highly optimised to not do anything but set a flag */
		481	for (fd = 0; fd < anfdmax; ++fd)
		482	if (anfds [fd].events)
		483	{
		484	anfds [fd].events = 0;
		485	fd_change (EV_A_ fd);
		486	}
		487	}
		488
		489	/*****************************************************************************/
		490
		491	static void
		492	upheap (WT *heap, int k)
		493	{
		494	WT w = heap [k];
		495
147	while (k && timers [k >> 1]->at > w->at)	496	while (k && heap [k >> 1]->at > w->at)
148	{	497	{
149	timers [k] = timers [k >> 1];	498	heap [k] = heap [k >> 1];
150	timers [k]->active = k + 1;	499	((W)heap [k])->active = k + 1;
151	k >>= 1;	500	k >>= 1;
152	}	501	}
153		502
154	timers [k] = w;	503	heap [k] = w;
155	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
156		505
157	}	506	}
158		507
159	static void	508	static void
160	downheap (int k)	509	downheap (WT *heap, int N, int k)
161	{	510	{
162	struct ev_timer *w = timers [k];	511	WT w = heap [k];
163		512
164	while (k <= (timercnt >> 1))	513	while (k < (N >> 1))
165	{	514	{
166	int j = k << 1;	515	int j = k << 1;
167		516
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	517	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
169	++j;	518	++j;
170		519
171	if (w->at <= timers [j]->at)	520	if (w->at <= heap [j]->at)
172	break;	521	break;
173		522
174	timers [k] = timers [j];	523	heap [k] = heap [j];
175	timers [k]->active = k;	524	((W)heap [k])->active = k + 1;
176	k = j;	525	k = j;
177	}	526	}
178		527
179	timers [k] = w;	528	heap [k] = w;
180	timers [k]->active = k + 1;	529	((W)heap [k])->active = k + 1;
181	}	530	}
182		531
183	static struct ev_signal **signals;	532	inline void
		533	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		534	{
		535	ev_tstamp old_at = heap [k]->at;
		536	heap [k]->at = at;
		537
		538	if (old_at < at)
		539	downheap (heap, N, k);
		540	else
		541	upheap (heap, k);
		542	}
		543
		544	/*****************************************************************************/
		545
		546	typedef struct
		547	{
		548	WL head;
		549	sig_atomic_t volatile gotsig;
		550	} ANSIG;
		551
		552	static ANSIG *signals;
184	static int signalmax, signalcnt;	553	static int signalmax;
185		554
		555	static int sigpipe [2];
		556	static sig_atomic_t volatile gotsig;
		557	static struct ev_io sigev;
		558
186	static void	559	static void
187	signals_init (struct ev_signal **base, int count)	560	signals_init (ANSIG *base, int count)
188	{	561	{
189	while (count--)	562	while (count--)
190	*base++ = 0;	563	{
191	}	564	base->head = 0;
		565	base->gotsig = 0;
192		566
		567	++base;
		568	}
		569	}
		570
		571	static void
		572	sighandler (int signum)
		573	{
		574	#if WIN32
		575	signal (signum, sighandler);
		576	#endif
		577
		578	signals [signum - 1].gotsig = 1;
		579
		580	if (!gotsig)
		581	{
		582	int old_errno = errno;
		583	gotsig = 1;
		584	#ifdef WIN32
		585	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		586	#else
		587	write (sigpipe [1], &signum, 1);
		588	#endif
		589	errno = old_errno;
		590	}
		591	}
		592
		593	void
		594	ev_feed_signal_event (EV_P_ int signum)
		595	{
		596	WL w;
		597
		598	#if EV_MULTIPLICITY
		599	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		600	#endif
		601
		602	--signum;
		603
		604	if (signum < 0 || signum >= signalmax)
		605	return;
		606
		607	signals [signum].gotsig = 0;
		608
		609	for (w = signals [signum].head; w; w = w->next)
		610	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		611	}
		612
		613	static void
		614	sigcb (EV_P_ struct ev_io *iow, int revents)
		615	{
		616	int signum;
		617
		618	#ifdef WIN32
		619	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		620	#else
		621	read (sigpipe [0], &revents, 1);
		622	#endif
		623	gotsig = 0;
		624
		625	for (signum = signalmax; signum--; )
		626	if (signals [signum].gotsig)
		627	ev_feed_signal_event (EV_A_ signum + 1);
		628	}
		629
		630	static void
		631	siginit (EV_P)
		632	{
		633	#ifndef WIN32
		634	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		635	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		636
		637	/* rather than sort out wether we really need nb, set it */
		638	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		639	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		640	#endif
		641
		642	ev_io_set (&sigev, sigpipe [0], EV_READ);
		643	ev_io_start (EV_A_ &sigev);
		644	ev_unref (EV_A); /* child watcher should not keep loop alive */
		645	}
		646
		647	/*****************************************************************************/
		648
		649	static struct ev_child *childs [PID_HASHSIZE];
		650
		651	#ifndef WIN32
		652
		653	static struct ev_signal childev;
		654
		655	#ifndef WCONTINUED
		656	# define WCONTINUED 0
		657	#endif
		658
		659	static void
		660	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		661	{
		662	struct ev_child *w;
		663
		664	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		665	if (w->pid == pid || !w->pid)
		666	{
		667	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		668	w->rpid = pid;
		669	w->rstatus = status;
		670	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		671	}
		672	}
		673
		674	static void
		675	childcb (EV_P_ struct ev_signal *sw, int revents)
		676	{
		677	int pid, status;
		678
		679	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		680	{
		681	/* make sure we are called again until all childs have been reaped */
		682	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		683
		684	child_reap (EV_A_ sw, pid, pid, status);
		685	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		686	}
		687	}
		688
		689	#endif
		690
		691	/*****************************************************************************/
		692
		693	#if EV_USE_KQUEUE
		694	# include "ev_kqueue.c"
		695	#endif
193	#if HAVE_EPOLL	696	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	697	# include "ev_epoll.c"
195	#endif	698	#endif
		699	#if EV_USE_POLL
		700	# include "ev_poll.c"
		701	#endif
196	#if HAVE_SELECT	702	#if EV_USE_SELECT
197	# include "ev_select.c"	703	# include "ev_select.c"
198	#endif	704	#endif
199		705
200	int ev_init (int flags)	706	int
		707	ev_version_major (void)
201	{	708	{
		709	return EV_VERSION_MAJOR;
		710	}
		711
		712	int
		713	ev_version_minor (void)
		714	{
		715	return EV_VERSION_MINOR;
		716	}
		717
		718	/* return true if we are running with elevated privileges and should ignore env variables */
		719	static int
		720	enable_secure (void)
		721	{
		722	#ifdef WIN32
		723	return 0;
		724	#else
		725	return getuid () != geteuid ()
		726	|| getgid () != getegid ();
		727	#endif
		728	}
		729
		730	int
		731	ev_method (EV_P)
		732	{
		733	return method;
		734	}
		735
		736	static void
		737	loop_init (EV_P_ int methods)
		738	{
		739	if (!method)
		740	{
202	#if HAVE_MONOTONIC	741	#if EV_USE_MONOTONIC
203	{	742	{
204	struct timespec ts;	743	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	744	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	745	have_monotonic = 1;
207	}	746	}
208	#endif	747	#endif
209		748
210	ev_now = ev_time ();	749	ev_rt_now = ev_time ();
		750	mn_now = get_clock ();
		751	now_floor = mn_now;
		752	rtmn_diff = ev_rt_now - mn_now;
211		753
		754	if (methods == EVMETHOD_AUTO)
		755	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		756	methods = atoi (getenv ("LIBEV_METHODS"));
		757	else
		758	methods = EVMETHOD_ANY;
		759
		760	method = 0;
		761	#if EV_USE_WIN32
		762	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		763	#endif
		764	#if EV_USE_KQUEUE
		765	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		766	#endif
212	#if HAVE_EPOLL	767	#if EV_USE_EPOLL
213	if (epoll_init (flags))	768	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
214	return ev_method;
215	#endif	769	#endif
		770	#if EV_USE_POLL
		771	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		772	#endif
216	#if HAVE_SELECT	773	#if EV_USE_SELECT
217	if (select_init (flags))	774	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
218	return ev_method;
219	#endif	775	#endif
220		776
221	ev_method = EVMETHOD_NONE;	777	ev_init (&sigev, sigcb);
222	return ev_method;	778	ev_set_priority (&sigev, EV_MAXPRI);
		779	}
223	}	780	}
224		781
225	void ev_prefork (void)	782	void
226	{	783	loop_destroy (EV_P)
227	}
228
229	void ev_postfork_parent (void)
230	{
231	}
232
233	void ev_postfork_child (void)
234	{
235	#if HAVE_EPOLL
236	epoll_postfork_child ();
237	#endif
238	}
239
240	static void
241	call_pending ()
242	{	784	{
243	int i;	785	int i;
244		786
245	for (i = 0; i < pendingcnt; ++i)	787	#if EV_USE_WIN32
		788	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		789	#endif
		790	#if EV_USE_KQUEUE
		791	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		792	#endif
		793	#if EV_USE_EPOLL
		794	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		795	#endif
		796	#if EV_USE_POLL
		797	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		798	#endif
		799	#if EV_USE_SELECT
		800	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		801	#endif
		802
		803	for (i = NUMPRI; i--; )
		804	array_free (pending, [i]);
		805
		806	/* have to use the microsoft-never-gets-it-right macro */
		807	array_free_microshit (fdchange);
		808	array_free_microshit (timer);
		809	array_free_microshit (periodic);
		810	array_free_microshit (idle);
		811	array_free_microshit (prepare);
		812	array_free_microshit (check);
		813
		814	method = 0;
		815	}
		816
		817	static void
		818	loop_fork (EV_P)
		819	{
		820	#if EV_USE_EPOLL
		821	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		822	#endif
		823	#if EV_USE_KQUEUE
		824	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		825	#endif
		826
		827	if (ev_is_active (&sigev))
		828	{
		829	/* default loop */
		830
		831	ev_ref (EV_A);
		832	ev_io_stop (EV_A_ &sigev);
		833	close (sigpipe [0]);
		834	close (sigpipe [1]);
		835
		836	while (pipe (sigpipe))
		837	syserr ("(libev) error creating pipe");
		838
		839	siginit (EV_A);
246	{	840	}
247	ANPENDING *p = pendings + i;
248		841
249	if (p->w)	842	postfork = 0;
		843	}
		844
		845	#if EV_MULTIPLICITY
		846	struct ev_loop *
		847	ev_loop_new (int methods)
		848	{
		849	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		850
		851	memset (loop, 0, sizeof (struct ev_loop));
		852
		853	loop_init (EV_A_ methods);
		854
		855	if (ev_method (EV_A))
		856	return loop;
		857
		858	return 0;
		859	}
		860
		861	void
		862	ev_loop_destroy (EV_P)
		863	{
		864	loop_destroy (EV_A);
		865	ev_free (loop);
		866	}
		867
		868	void
		869	ev_loop_fork (EV_P)
		870	{
		871	postfork = 1;
		872	}
		873
		874	#endif
		875
		876	#if EV_MULTIPLICITY
		877	struct ev_loop *
		878	#else
		879	int
		880	#endif
		881	ev_default_loop (int methods)
		882	{
		883	if (sigpipe [0] == sigpipe [1])
		884	if (pipe (sigpipe))
		885	return 0;
		886
		887	if (!default_loop)
		888	{
		889	#if EV_MULTIPLICITY
		890	struct ev_loop *loop = default_loop = &default_loop_struct;
		891	#else
		892	default_loop = 1;
		893	#endif
		894
		895	loop_init (EV_A_ methods);
		896
		897	if (ev_method (EV_A))
250	{	898	{
251	p->w->pending = 0;	899	siginit (EV_A);
252	p->w->cb (p->w, p->events);	900
		901	#ifndef WIN32
		902	ev_signal_init (&childev, childcb, SIGCHLD);
		903	ev_set_priority (&childev, EV_MAXPRI);
		904	ev_signal_start (EV_A_ &childev);
		905	ev_unref (EV_A); /* child watcher should not keep loop alive */
		906	#endif
253	}	907	}
		908	else
		909	default_loop = 0;
		910	}
		911
		912	return default_loop;
		913	}
		914
		915	void
		916	ev_default_destroy (void)
		917	{
		918	#if EV_MULTIPLICITY
		919	struct ev_loop *loop = default_loop;
		920	#endif
		921
		922	#ifndef WIN32
		923	ev_ref (EV_A); /* child watcher */
		924	ev_signal_stop (EV_A_ &childev);
		925	#endif
		926
		927	ev_ref (EV_A); /* signal watcher */
		928	ev_io_stop (EV_A_ &sigev);
		929
		930	close (sigpipe [0]); sigpipe [0] = 0;
		931	close (sigpipe [1]); sigpipe [1] = 0;
		932
		933	loop_destroy (EV_A);
		934	}
		935
		936	void
		937	ev_default_fork (void)
		938	{
		939	#if EV_MULTIPLICITY
		940	struct ev_loop *loop = default_loop;
		941	#endif
		942
		943	if (method)
		944	postfork = 1;
		945	}
		946
		947	/*****************************************************************************/
		948
		949	static int
		950	any_pending (EV_P)
		951	{
		952	int pri;
		953
		954	for (pri = NUMPRI; pri--; )
		955	if (pendingcnt [pri])
		956	return 1;
		957
		958	return 0;
		959	}
		960
		961	static void
		962	call_pending (EV_P)
		963	{
		964	int pri;
		965
		966	for (pri = NUMPRI; pri--; )
		967	while (pendingcnt [pri])
		968	{
		969	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		970
		971	if (p->w)
		972	{
		973	p->w->pending = 0;
		974	EV_CB_INVOKE (p->w, p->events);
		975	}
254	}	976	}
255
256	pendingcnt = 0;
257	}	977	}
258		978
259	static void	979	static void
260	timer_reify (void)	980	timers_reify (EV_P)
261	{	981	{
262	while (timercnt && timers [0]->at <= ev_now)	982	while (timercnt && ((WT)timers [0])->at <= mn_now)
263	{	983	{
264	struct ev_timer *w = timers [0];	984	struct ev_timer *w = timers [0];
265		985
		986	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		987
266	/* first reschedule timer */	988	/* first reschedule or stop timer */
267	if (w->repeat)	989	if (w->repeat)
268	{	990	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	991	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	992	((WT)w)->at = mn_now + w->repeat;
274		993	downheap ((WT *)timers, timercnt, 0);
275	fprintf (stderr, "b %f\n", w->at);//D
276
277	downheap (0);
278	}	994	}
279	else	995	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	996	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		997
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	998	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		999	}
		1000	}
		1001
		1002	static void
		1003	periodics_reify (EV_P)
		1004	{
		1005	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
283	}	1006	{
284	}	1007	struct ev_periodic *w = periodics [0];
285		1008
286	int ev_loop_done;	1009	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
287		1010
		1011	/* first reschedule or stop timer */
		1012	if (w->reschedule_cb)
		1013	{
		1014	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1015
		1016	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1017	downheap ((WT *)periodics, periodiccnt, 0);
		1018	}
		1019	else if (w->interval)
		1020	{
		1021	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1022	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1023	downheap ((WT *)periodics, periodiccnt, 0);
		1024	}
		1025	else
		1026	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1027
		1028	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1029	}
		1030	}
		1031
		1032	static void
		1033	periodics_reschedule (EV_P)
		1034	{
		1035	int i;
		1036
		1037	/* adjust periodics after time jump */
		1038	for (i = 0; i < periodiccnt; ++i)
		1039	{
		1040	struct ev_periodic *w = periodics [i];
		1041
		1042	if (w->reschedule_cb)
		1043	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1044	else if (w->interval)
		1045	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1046	}
		1047
		1048	/* now rebuild the heap */
		1049	for (i = periodiccnt >> 1; i--; )
		1050	downheap ((WT *)periodics, periodiccnt, i);
		1051	}
		1052
		1053	inline int
		1054	time_update_monotonic (EV_P)
		1055	{
		1056	mn_now = get_clock ();
		1057
		1058	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1059	{
		1060	ev_rt_now = rtmn_diff + mn_now;
		1061	return 0;
		1062	}
		1063	else
		1064	{
		1065	now_floor = mn_now;
		1066	ev_rt_now = ev_time ();
		1067	return 1;
		1068	}
		1069	}
		1070
		1071	static void
		1072	time_update (EV_P)
		1073	{
		1074	int i;
		1075
		1076	#if EV_USE_MONOTONIC
		1077	if (expect_true (have_monotonic))
		1078	{
		1079	if (time_update_monotonic (EV_A))
		1080	{
		1081	ev_tstamp odiff = rtmn_diff;
		1082
		1083	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1084	{
		1085	rtmn_diff = ev_rt_now - mn_now;
		1086
		1087	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1088	return; /* all is well */
		1089
		1090	ev_rt_now = ev_time ();
		1091	mn_now = get_clock ();
		1092	now_floor = mn_now;
		1093	}
		1094
		1095	periodics_reschedule (EV_A);
		1096	/* no timer adjustment, as the monotonic clock doesn't jump */
		1097	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1098	}
		1099	}
		1100	else
		1101	#endif
		1102	{
		1103	ev_rt_now = ev_time ();
		1104
		1105	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1106	{
		1107	periodics_reschedule (EV_A);
		1108
		1109	/* adjust timers. this is easy, as the offset is the same for all */
		1110	for (i = 0; i < timercnt; ++i)
		1111	((WT)timers [i])->at += ev_rt_now - mn_now;
		1112	}
		1113
		1114	mn_now = ev_rt_now;
		1115	}
		1116	}
		1117
		1118	void
		1119	ev_ref (EV_P)
		1120	{
		1121	++activecnt;
		1122	}
		1123
		1124	void
		1125	ev_unref (EV_P)
		1126	{
		1127	--activecnt;
		1128	}
		1129
		1130	static int loop_done;
		1131
		1132	void
288	int ev_loop (int flags)	1133	ev_loop (EV_P_ int flags)
289	{	1134	{
290	double block;	1135	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	1136	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
292		1137
293	do	1138	do
294	{	1139	{
		1140	/* queue check watchers (and execute them) */
		1141	if (expect_false (preparecnt))
		1142	{
		1143	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1144	call_pending (EV_A);
		1145	}
		1146
		1147	/* we might have forked, so reify kernel state if necessary */
		1148	if (expect_false (postfork))
		1149	loop_fork (EV_A);
		1150
295	/* update fd-related kernel structures */	1151	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	1152	fd_reify (EV_A);
297		1153
298	/* calculate blocking time */	1154	/* calculate blocking time */
		1155
		1156	/* we only need this for !monotonic clock or timers, but as we basically
		1157	always have timers, we just calculate it always */
		1158	#if EV_USE_MONOTONIC
		1159	if (expect_true (have_monotonic))
		1160	time_update_monotonic (EV_A);
		1161	else
		1162	#endif
		1163	{
299	ev_now = ev_time ();	1164	ev_rt_now = ev_time ();
		1165	mn_now = ev_rt_now;
		1166	}
300		1167
301	if (flags & EVLOOP_NONBLOCK)	1168	if (flags & EVLOOP_NONBLOCK || idlecnt)
302	block = 0.;	1169	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;
305	else	1170	else
306	{	1171	{
		1172	block = MAX_BLOCKTIME;
		1173
		1174	if (timercnt)
		1175	{
307	block = timers [0]->at - ev_now + method_fudge;	1176	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1177	if (block > to) block = to;
		1178	}
		1179
		1180	if (periodiccnt)
		1181	{
		1182	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
		1183	if (block > to) block = to;
		1184	}
		1185
308	if (block < 0.) block = 0.;	1186	if (block < 0.) block = 0.;
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
310	}	1187	}
311		1188
312	fprintf (stderr, "block %f\n", block);//D
313	method_poll (block);	1189	method_poll (EV_A_ block);
314		1190
		1191	/* update ev_rt_now, do magic */
		1192	time_update (EV_A);
		1193
315	/* put pending timers into pendign queue and reschedule them */	1194	/* queue pending timers and reschedule them */
316	timer_reify ();	1195	timers_reify (EV_A); /* relative timers called last */
		1196	periodics_reify (EV_A); /* absolute timers called first */
317		1197
318	ev_now = ev_time ();	1198	/* queue idle watchers unless io or timers are pending */
		1199	if (idlecnt && !any_pending (EV_A))
		1200	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1201
		1202	/* queue check watchers, to be executed first */
		1203	if (checkcnt)
		1204	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1205
319	call_pending ();	1206	call_pending (EV_A);
320	}	1207	}
321	while (!ev_loop_done);	1208	while (activecnt && !loop_done);
322	}
323		1209
324	static void	1210	if (loop_done != 2)
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1211	loop_done = 0;
		1212	}
		1213
		1214	void
		1215	ev_unloop (EV_P_ int how)
		1216	{
		1217	loop_done = how;
		1218	}
		1219
		1220	/*****************************************************************************/
		1221
		1222	inline void
		1223	wlist_add (WL *head, WL elem)
326	{	1224	{
327	elem->next = *head;	1225	elem->next = *head;
328	*head = elem;	1226	*head = elem;
329	}	1227	}
330		1228
331	static void	1229	inline void
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1230	wlist_del (WL *head, WL elem)
333	{	1231	{
334	while (*head)	1232	while (*head)
335	{	1233	{
336	if (*head == elem)	1234	if (*head == elem)
337	{	1235	{
…		…
341		1239
342	head = &(*head)->next;	1240	head = &(*head)->next;
343	}	1241	}
344	}	1242	}
345		1243
346	static void	1244	inline void
347	ev_start (struct ev_watcher *w, int active)	1245	ev_clear_pending (EV_P_ W w)
348	{	1246	{
		1247	if (w->pending)
		1248	{
		1249	pendings [ABSPRI (w)][w->pending - 1].w = 0;
349	w->pending = 0;	1250	w->pending = 0;
		1251	}
		1252	}
		1253
		1254	inline void
		1255	ev_start (EV_P_ W w, int active)
		1256	{
		1257	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1258	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1259
350	w->active = active;	1260	w->active = active;
		1261	ev_ref (EV_A);
351	}	1262	}
352		1263
353	static void	1264	inline void
354	ev_stop (struct ev_watcher *w)	1265	ev_stop (EV_P_ W w)
355	{	1266	{
356	if (w->pending)	1267	ev_unref (EV_A);
357	pendings [w->pending - 1].w = 0;
358
359	w->active = 0;	1268	w->active = 0;
360	/* nop */
361	}	1269	}
362		1270
		1271	/*****************************************************************************/
		1272
363	void	1273	void
364	evio_start (struct ev_io *w)	1274	ev_io_start (EV_P_ struct ev_io *w)
365	{	1275	{
		1276	int fd = w->fd;
		1277
366	if (ev_is_active (w))	1278	if (ev_is_active (w))
367	return;	1279	return;
368		1280
369	int fd = w->fd;	1281	assert (("ev_io_start called with negative fd", fd >= 0));
370		1282
371	ev_start ((struct ev_watcher *)w, 1);	1283	ev_start (EV_A_ (W)w, 1);
372	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1284	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
373	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1285	wlist_add ((WL *)&anfds[fd].head, (WL)w);
374		1286
375	++fdchangecnt;	1287	fd_change (EV_A_ fd);
376	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
377	fdchanges [fdchangecnt - 1] = fd;
378	}	1288	}
379		1289
380	void	1290	void
381	evio_stop (struct ev_io *w)	1291	ev_io_stop (EV_P_ struct ev_io *w)
382	{	1292	{
		1293	ev_clear_pending (EV_A_ (W)w);
383	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
384	return;	1295	return;
385		1296
386	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1297	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
387	ev_stop ((struct ev_watcher *)w);	1298	ev_stop (EV_A_ (W)w);
388		1299
389	++fdchangecnt;	1300	fd_change (EV_A_ w->fd);
390	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
391	fdchanges [fdchangecnt - 1] = w->fd;
392	}	1301	}
393		1302
394	void	1303	void
395	evtimer_start (struct ev_timer *w)	1304	ev_timer_start (EV_P_ struct ev_timer *w)
396	{	1305	{
397	if (ev_is_active (w))	1306	if (ev_is_active (w))
398	return;	1307	return;
399		1308
400	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1309	((WT)w)->at += mn_now;
401	if (w->is_abs)	1310
		1311	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1312
		1313	ev_start (EV_A_ (W)w, ++timercnt);
		1314	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1315	timers [timercnt - 1] = w;
		1316	upheap ((WT *)timers, timercnt - 1);
		1317
		1318	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1319	}
		1320
		1321	void
		1322	ev_timer_stop (EV_P_ struct ev_timer *w)
		1323	{
		1324	ev_clear_pending (EV_A_ (W)w);
		1325	if (!ev_is_active (w))
		1326	return;
		1327
		1328	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1329
		1330	if (((W)w)->active < timercnt--)
		1331	{
		1332	timers [((W)w)->active - 1] = timers [timercnt];
		1333	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1334	}
		1335
		1336	((WT)w)->at = w->repeat;
		1337
		1338	ev_stop (EV_A_ (W)w);
		1339	}
		1340
		1341	void
		1342	ev_timer_again (EV_P_ struct ev_timer *w)
		1343	{
		1344	if (ev_is_active (w))
402	{	1345	{
403	if (w->repeat)	1346	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1347	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
		1348	else
		1349	ev_timer_stop (EV_A_ w);
		1350	}
		1351	else if (w->repeat)
		1352	ev_timer_start (EV_A_ w);
		1353	}
		1354
		1355	void
		1356	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1357	{
		1358	if (ev_is_active (w))
		1359	return;
		1360
		1361	if (w->reschedule_cb)
		1362	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1363	else if (w->interval)
405	}	1364	{
		1365	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1366	/* this formula differs from the one in periodic_reify because we do not always round up */
		1367	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1368	}
		1369
		1370	ev_start (EV_A_ (W)w, ++periodiccnt);
		1371	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1372	periodics [periodiccnt - 1] = w;
		1373	upheap ((WT *)periodics, periodiccnt - 1);
		1374
		1375	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1376	}
		1377
		1378	void
		1379	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1380	{
		1381	ev_clear_pending (EV_A_ (W)w);
		1382	if (!ev_is_active (w))
		1383	return;
		1384
		1385	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1386
		1387	if (((W)w)->active < periodiccnt--)
		1388	{
		1389	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1390	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1391	}
		1392
		1393	ev_stop (EV_A_ (W)w);
		1394	}
		1395
		1396	void
		1397	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1398	{
		1399	/* TODO: use adjustheap and recalculation */
		1400	ev_periodic_stop (EV_A_ w);
		1401	ev_periodic_start (EV_A_ w);
		1402	}
		1403
		1404	void
		1405	ev_idle_start (EV_P_ struct ev_idle *w)
		1406	{
		1407	if (ev_is_active (w))
		1408	return;
		1409
		1410	ev_start (EV_A_ (W)w, ++idlecnt);
		1411	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1412	idles [idlecnt - 1] = w;
		1413	}
		1414
		1415	void
		1416	ev_idle_stop (EV_P_ struct ev_idle *w)
		1417	{
		1418	ev_clear_pending (EV_A_ (W)w);
		1419	if (ev_is_active (w))
		1420	return;
		1421
		1422	idles [((W)w)->active - 1] = idles [--idlecnt];
		1423	ev_stop (EV_A_ (W)w);
		1424	}
		1425
		1426	void
		1427	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1428	{
		1429	if (ev_is_active (w))
		1430	return;
		1431
		1432	ev_start (EV_A_ (W)w, ++preparecnt);
		1433	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1434	prepares [preparecnt - 1] = w;
		1435	}
		1436
		1437	void
		1438	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1439	{
		1440	ev_clear_pending (EV_A_ (W)w);
		1441	if (ev_is_active (w))
		1442	return;
		1443
		1444	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1445	ev_stop (EV_A_ (W)w);
		1446	}
		1447
		1448	void
		1449	ev_check_start (EV_P_ struct ev_check *w)
		1450	{
		1451	if (ev_is_active (w))
		1452	return;
		1453
		1454	ev_start (EV_A_ (W)w, ++checkcnt);
		1455	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1456	checks [checkcnt - 1] = w;
		1457	}
		1458
		1459	void
		1460	ev_check_stop (EV_P_ struct ev_check *w)
		1461	{
		1462	ev_clear_pending (EV_A_ (W)w);
		1463	if (ev_is_active (w))
		1464	return;
		1465
		1466	checks [((W)w)->active - 1] = checks [--checkcnt];
		1467	ev_stop (EV_A_ (W)w);
		1468	}
		1469
		1470	#ifndef SA_RESTART
		1471	# define SA_RESTART 0
		1472	#endif
		1473
		1474	void
		1475	ev_signal_start (EV_P_ struct ev_signal *w)
		1476	{
		1477	#if EV_MULTIPLICITY
		1478	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1479	#endif
		1480	if (ev_is_active (w))
		1481	return;
		1482
		1483	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1484
		1485	ev_start (EV_A_ (W)w, 1);
		1486	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1487	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1488
		1489	if (!((WL)w)->next)
		1490	{
		1491	#if WIN32
		1492	signal (w->signum, sighandler);
		1493	#else
		1494	struct sigaction sa;
		1495	sa.sa_handler = sighandler;
		1496	sigfillset (&sa.sa_mask);
		1497	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1498	sigaction (w->signum, &sa, 0);
		1499	#endif
		1500	}
		1501	}
		1502
		1503	void
		1504	ev_signal_stop (EV_P_ struct ev_signal *w)
		1505	{
		1506	ev_clear_pending (EV_A_ (W)w);
		1507	if (!ev_is_active (w))
		1508	return;
		1509
		1510	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1511	ev_stop (EV_A_ (W)w);
		1512
		1513	if (!signals [w->signum - 1].head)
		1514	signal (w->signum, SIG_DFL);
		1515	}
		1516
		1517	void
		1518	ev_child_start (EV_P_ struct ev_child *w)
		1519	{
		1520	#if EV_MULTIPLICITY
		1521	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1522	#endif
		1523	if (ev_is_active (w))
		1524	return;
		1525
		1526	ev_start (EV_A_ (W)w, 1);
		1527	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1528	}
		1529
		1530	void
		1531	ev_child_stop (EV_P_ struct ev_child *w)
		1532	{
		1533	ev_clear_pending (EV_A_ (W)w);
		1534	if (ev_is_active (w))
		1535	return;
		1536
		1537	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1538	ev_stop (EV_A_ (W)w);
		1539	}
		1540
		1541	/*****************************************************************************/
		1542
		1543	struct ev_once
		1544	{
		1545	struct ev_io io;
		1546	struct ev_timer to;
		1547	void (*cb)(int revents, void *arg);
		1548	void *arg;
		1549	};
		1550
		1551	static void
		1552	once_cb (EV_P_ struct ev_once *once, int revents)
		1553	{
		1554	void (*cb)(int revents, void *arg) = once->cb;
		1555	void *arg = once->arg;
		1556
		1557	ev_io_stop (EV_A_ &once->io);
		1558	ev_timer_stop (EV_A_ &once->to);
		1559	ev_free (once);
		1560
		1561	cb (revents, arg);
		1562	}
		1563
		1564	static void
		1565	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1566	{
		1567	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1568	}
		1569
		1570	static void
		1571	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1572	{
		1573	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1574	}
		1575
		1576	void
		1577	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1578	{
		1579	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
		1580
		1581	if (!once)
		1582	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
406	else	1583	else
407	w->at += ev_now;	1584	{
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D	1585	once->cb = cb;
		1586	once->arg = arg;
409		1587
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1588	ev_init (&once->io, once_cb_io);
411	array_needsize (timers, timermax, timercnt, );	1589	if (fd >= 0)
412	timers [timercnt - 1] = w;	1590	{
413	upheap (timercnt - 1);	1591	ev_io_set (&once->io, fd, events);
414	}	1592	ev_io_start (EV_A_ &once->io);
		1593	}
415		1594
416	void	1595	ev_init (&once->to, once_cb_to);
417	evtimer_stop (struct ev_timer *w)	1596	if (timeout >= 0.)
418	{	1597	{
419	if (!ev_is_active (w))	1598	ev_timer_set (&once->to, timeout, 0.);
420	return;	1599	ev_timer_start (EV_A_ &once->to);
421		1600	}
422	timers [w->active - 1] = timers [--timercnt];	1601	}
423	downheap (w->active - 1);
424	ev_stop ((struct ev_watcher *)w);
425	}	1602	}
426		1603
427	void	1604	#ifdef __cplusplus
428	evsignal_start (struct ev_signal *w)
429	{
430	if (ev_is_active (w))
431	return;
432
433	ev_start ((struct ev_watcher *)w, 1);
434	array_needsize (signals, signalmax, w->signum, signals_init);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
436	}	1605	}
437
438	void
439	evsignal_stop (struct ev_signal *w)
440	{
441	if (!ev_is_active (w))
442	return;
443
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
445	ev_stop ((struct ev_watcher *)w);
446	}
447
448	/*****************************************************************************/
449	#if 1
450
451	static void
452	sin_cb (struct ev_io *w, int revents)
453	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
455	}
456
457	static void
458	ocb (struct ev_timer *w, int revents)
459	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
461	}
462
463	int main (void)
464	{
465	struct ev_io sin;
466
467	ev_init (0);
468
469	evw_init (&sin, sin_cb, 55);
470	evio_set (&sin, 0, EV_READ);
471	evio_start (&sin);
472
473	struct ev_timer t1;
474	evw_init (&t1, ocb, 1);
475	evtimer_set_rel (&t1, 1, 0);
476	evtimer_start (&t1);
477
478	struct ev_timer t2;
479	evw_init (&t2, ocb, 2);
480	evtimer_set_abs (&t2, ev_time () + 2, 0);
481	evtimer_start (&t2);
482
483	ev_loop (0);
484
485	return 0;
486	}
487
488	#endif	1606	#endif
489		1607
490
491
492

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