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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 1.117 by ayin, Thu Nov 15 17:15:56 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_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	#else
		85	# define WIN32_LEAN_AND_MEAN
		86	# include <windows.h>
		87	# ifndef EV_SELECT_IS_WINSOCKET
		88	# define EV_SELECT_IS_WINSOCKET 1
		89	# endif
		90	#endif
		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
		98	#ifndef EV_USE_SELECT
		99	# define EV_USE_SELECT 1
		100	# define EV_SELECT_USE_FD_SET 1
		101	#endif
		102
		103	#ifndef EV_USE_POLL
		104	# ifdef _WIN32
		105	# define EV_USE_POLL 0
		106	# else
		107	# define EV_USE_POLL 1
		108	# endif
		109	#endif
		110
		111	#ifndef EV_USE_EPOLL
		112	# define EV_USE_EPOLL 0
		113	#endif
		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
		119	#ifndef EV_USE_REALTIME
		120	# define EV_USE_REALTIME 1
		121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cannot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
10	#ifdef CLOCK_MONOTONIC	131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	133	# define EV_USE_MONOTONIC 0
12	#endif	134	#endif
13		135
14	#define HAVE_EPOLL 1	136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	138	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	139	#endif
17		140
18	#define MAX_BLOCKTIME 60.	141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
19		144
		145	/**/
		146
		147	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		149	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		150	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
20	#include "ev.h"	155	# include "ev.h"
		156	#endif
21		157
		158	#if __GNUC__ >= 3
		159	# define expect(expr,value) __builtin_expect ((expr),(value))
		160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
		165
		166	#define expect_false(expr) expect ((expr) != 0, 0)
		167	#define expect_true(expr) expect ((expr) != 0, 1)
		168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		173	#define EMPTY2(a,b) /* used to suppress some warnings */
		174
22	struct ev_watcher {	175	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	176	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	177	typedef struct ev_watcher_time *WT;
28	};
29		178
		179	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		180
		181	#ifdef _WIN32
		182	# include "ev_win32.c"
		183	#endif
		184
		185	/*****************************************************************************/
		186
		187	static void (*syserr_cb)(const char *msg);
		188
		189	void ev_set_syserr_cb (void (*cb)(const char *msg))
		190	{
		191	syserr_cb = cb;
		192	}
		193
		194	static void
		195	syserr (const char *msg)
		196	{
		197	if (!msg)
		198	msg = "(libev) system error";
		199
		200	if (syserr_cb)
		201	syserr_cb (msg);
		202	else
		203	{
		204	perror (msg);
		205	abort ();
		206	}
		207	}
		208
		209	static void *(*alloc)(void *ptr, long size);
		210
		211	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		212	{
		213	alloc = cb;
		214	}
		215
		216	static void *
		217	ev_realloc (void *ptr, long size)
		218	{
		219	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		220
		221	if (!ptr && size)
		222	{
		223	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		224	abort ();
		225	}
		226
		227	return ptr;
		228	}
		229
		230	#define ev_malloc(size) ev_realloc (0, (size))
		231	#define ev_free(ptr) ev_realloc ((ptr), 0)
		232
		233	/*****************************************************************************/
		234
		235	typedef struct
		236	{
		237	WL head;
		238	unsigned char events;
		239	unsigned char reify;
		240	#if EV_SELECT_IS_WINSOCKET
		241	SOCKET handle;
		242	#endif
		243	} ANFD;
		244
		245	typedef struct
		246	{
		247	W w;
		248	int events;
		249	} ANPENDING;
		250
		251	#if EV_MULTIPLICITY
		252
		253	struct ev_loop
		254	{
		255	ev_tstamp ev_rt_now;
		256	#define ev_rt_now ((loop)->ev_rt_now)
		257	#define VAR(name,decl) decl;
		258	#include "ev_vars.h"
		259	#undef VAR
		260	};
		261	#include "ev_wrap.h"
		262
		263	static struct ev_loop default_loop_struct;
		264	struct ev_loop *ev_default_loop_ptr;
		265
		266	#else
		267
30	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
31	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
32		272
33	static int have_monotonic; /* runtime */	273	static int ev_default_loop_ptr;
34		274
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
36	static void (*method_reify)(void);	276
37	static void (*method_poll)(ev_tstamp timeout);	277	/*****************************************************************************/
38		278
39	ev_tstamp	279	ev_tstamp
40	ev_time (void)	280	ev_time (void)
41	{	281	{
42	#if HAVE_REALTIME	282	#if EV_USE_REALTIME
43	struct timespec ts;	283	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	284	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	285	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	286	#else
47	struct timeval tv;	287	struct timeval tv;
48	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	290	#endif
51	}	291	}
52		292
53	static ev_tstamp	293	inline ev_tstamp
54	get_clock (void)	294	get_clock (void)
55	{	295	{
56	#if HAVE_MONOTONIC	296	#if EV_USE_MONOTONIC
57	if (have_monotonic)	297	if (expect_true (have_monotonic))
58	{	298	{
59	struct timespec ts;	299	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	302	}
63	#endif	303	#endif
64		304
65	return ev_time ();	305	return ev_time ();
66	}	306	}
67		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
		316	#define array_roundsize(type,n) (((n) | 4) & ~3)
		317
68	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
70	{ \	320	{ \
71	int newcnt = cur ? cur << 1 : 16; \	321	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	322	do \
		323	{ \
		324	newcnt = array_roundsize (type, newcnt << 1); \
		325	} \
		326	while ((cnt) > newcnt); \
		327	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	328	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
74	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	330	cur = newcnt; \
76	}	331	}
77		332
78	typedef struct	333	#define array_slim(type,stem) \
79	{	334	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
80	struct ev_io *head;	335	{ \
81	unsigned char wev, rev; /* want, received event set */	336	stem ## max = array_roundsize (stem ## cnt >> 1); \
82	} ANFD;	337	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		338	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		339	}
83		340
84	static ANFD *anfds;	341	#define array_free(stem, idx) \
85	static int anfdmax;	342	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
86		343
87	static int *fdchanges;	344	/*****************************************************************************/
88	static int fdchangemax, fdchangecnt;
89		345
90	static void	346	static void
91	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
92	{	348	{
93	while (count--)	349	while (count--)
94	{	350	{
95	base->head = 0;	351	base->head = 0;
96	base->wev = base->rev = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
97	++base;	355	++base;
98	}	356	}
99	}	357	}
100		358
101	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
102	{	361	{
103	struct ev_watcher *w;	362	W w_ = (W)w;
104	int events;
105	} ANPENDING;
106		363
107	static ANPENDING *pendings;	364	if (w_->pending)
108	static int pendingmax, pendingcnt;	365	{
		366	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		367	return;
		368	}
109		369
110	static void
111	event (struct ev_watcher *w, int events)
112	{
113	w->pending = ++pendingcnt;	370	w_->pending = ++pendingcnt [ABSPRI (w_)];
114	array_needsize (pendings, pendingmax, pendingcnt, );	371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
115	pendings [pendingcnt - 1].w = w;	372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
116	pendings [pendingcnt - 1].events = events;	373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
117	}	374	}
118		375
119	static void	376	static void
		377	queue_events (EV_P_ W *events, int eventcnt, int type)
		378	{
		379	int i;
		380
		381	for (i = 0; i < eventcnt; ++i)
		382	ev_feed_event (EV_A_ events [i], type);
		383	}
		384
		385	inline void
120	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
121	{	387	{
122	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
123	struct ev_io *w;	389	struct ev_io *w;
124		390
125	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126	{	392	{
127	int ev = w->events & events;	393	int ev = w->events & revents;
128		394
129	if (ev)	395	if (ev)
130	event ((struct ev_watcher *)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
		397	}
		398	}
		399
		400	void
		401	ev_feed_fd_event (EV_P_ int fd, int revents)
		402	{
		403	fd_event (EV_A_ fd, revents);
		404	}
		405
		406	/*****************************************************************************/
		407
		408	static void
		409	fd_reify (EV_P)
		410	{
		411	int i;
		412
		413	for (i = 0; i < fdchangecnt; ++i)
		414	{
		415	int fd = fdchanges [i];
		416	ANFD *anfd = anfds + fd;
		417	struct ev_io *w;
		418
		419	int events = 0;
		420
		421	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		422	events |= w->events;
		423
		424	#if EV_SELECT_IS_WINSOCKET
		425	if (events)
		426	{
		427	unsigned long argp;
		428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
		437	}
		438
		439	fdchangecnt = 0;
		440	}
		441
		442	static void
		443	fd_change (EV_P_ int fd)
		444	{
		445	if (anfds [fd].reify)
		446	return;
		447
		448	anfds [fd].reify = 1;
		449
		450	++fdchangecnt;
		451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		452	fdchanges [fdchangecnt - 1] = fd;
		453	}
		454
		455	static void
		456	fd_kill (EV_P_ int fd)
		457	{
		458	struct ev_io *w;
		459
		460	while ((w = (struct ev_io *)anfds [fd].head))
		461	{
		462	ev_io_stop (EV_A_ w);
		463	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		464	}
		465	}
		466
		467	static int
		468	fd_valid (int fd)
		469	{
		470	#ifdef _WIN32
		471	return _get_osfhandle (fd) != -1;
		472	#else
		473	return fcntl (fd, F_GETFD) != -1;
		474	#endif
		475	}
		476
		477	/* called on EBADF to verify fds */
		478	static void
		479	fd_ebadf (EV_P)
		480	{
		481	int fd;
		482
		483	for (fd = 0; fd < anfdmax; ++fd)
		484	if (anfds [fd].events)
		485	if (!fd_valid (fd) == -1 && errno == EBADF)
		486	fd_kill (EV_A_ fd);
		487	}
		488
		489	/* called on ENOMEM in select/poll to kill some fds and retry */
		490	static void
		491	fd_enomem (EV_P)
		492	{
		493	int fd;
		494
		495	for (fd = anfdmax; fd--; )
		496	if (anfds [fd].events)
		497	{
		498	fd_kill (EV_A_ fd);
		499	return;
131	}	500	}
132	}	501	}
133		502
134	static struct ev_timer **timers;	503	/* usually called after fork if method needs to re-arm all fds from scratch */
135	static int timermax, timercnt;
136
137	static void	504	static void
138	upheap (int k)	505	fd_rearm_all (EV_P)
139	{	506	{
140	struct ev_timer *w = timers [k];	507	int fd;
141		508
		509	/* this should be highly optimised to not do anything but set a flag */
		510	for (fd = 0; fd < anfdmax; ++fd)
		511	if (anfds [fd].events)
		512	{
		513	anfds [fd].events = 0;
		514	fd_change (EV_A_ fd);
		515	}
		516	}
		517
		518	/*****************************************************************************/
		519
		520	static void
		521	upheap (WT *heap, int k)
		522	{
		523	WT w = heap [k];
		524
142	while (k && timers [k >> 1]->at > w->at)	525	while (k && heap [k >> 1]->at > w->at)
143	{	526	{
144	timers [k] = timers [k >> 1];	527	heap [k] = heap [k >> 1];
145	timers [k]->active = k + 1;	528	((W)heap [k])->active = k + 1;
146	k >>= 1;	529	k >>= 1;
147	}	530	}
148		531
149	timers [k] = w;	532	heap [k] = w;
150	timers [k]->active = k + 1;	533	((W)heap [k])->active = k + 1;
151		534
152	}	535	}
153		536
154	static void	537	static void
155	downheap (int k)	538	downheap (WT *heap, int N, int k)
156	{	539	{
157	struct ev_timer *w = timers [k];	540	WT w = heap [k];
158		541
159	while (k < (timercnt >> 1))	542	while (k < (N >> 1))
160	{	543	{
161	int j = k << 1;	544	int j = k << 1;
162		545
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164	++j;	547	++j;
165		548
166	if (w->at <= timers [j]->at)	549	if (w->at <= heap [j]->at)
167	break;	550	break;
168		551
169	timers [k] = timers [j];	552	heap [k] = heap [j];
170	timers [k]->active = k + 1;	553	((W)heap [k])->active = k + 1;
171	k = j;	554	k = j;
172	}	555	}
173		556
174	timers [k] = w;	557	heap [k] = w;
175	timers [k]->active = k + 1;	558	((W)heap [k])->active = k + 1;
176	}	559	}
177		560
178	static struct ev_signal **signals;	561	inline void
		562	adjustheap (WT *heap, int N, int k)
		563	{
		564	upheap (heap, k);
		565	downheap (heap, N, k);
		566	}
		567
		568	/*****************************************************************************/
		569
		570	typedef struct
		571	{
		572	WL head;
		573	sig_atomic_t volatile gotsig;
		574	} ANSIG;
		575
		576	static ANSIG *signals;
179	static int signalmax, signalcnt;	577	static int signalmax;
180		578
		579	static int sigpipe [2];
		580	static sig_atomic_t volatile gotsig;
		581	static struct ev_io sigev;
		582
181	static void	583	static void
182	signals_init (struct ev_signal **base, int count)	584	signals_init (ANSIG *base, int count)
183	{	585	{
184	while (count--)	586	while (count--)
185	*base++ = 0;	587	{
186	}	588	base->head = 0;
		589	base->gotsig = 0;
187		590
		591	++base;
		592	}
		593	}
		594
		595	static void
		596	sighandler (int signum)
		597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
		602	signals [signum - 1].gotsig = 1;
		603
		604	if (!gotsig)
		605	{
		606	int old_errno = errno;
		607	gotsig = 1;
		608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
		610	}
		611	}
		612
		613	void
		614	ev_feed_signal_event (EV_P_ int signum)
		615	{
		616	WL w;
		617
		618	#if EV_MULTIPLICITY
		619	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		620	#endif
		621
		622	--signum;
		623
		624	if (signum < 0 || signum >= signalmax)
		625	return;
		626
		627	signals [signum].gotsig = 0;
		628
		629	for (w = signals [signum].head; w; w = w->next)
		630	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		631	}
		632
		633	static void
		634	sigcb (EV_P_ struct ev_io *iow, int revents)
		635	{
		636	int signum;
		637
		638	read (sigpipe [0], &revents, 1);
		639	gotsig = 0;
		640
		641	for (signum = signalmax; signum--; )
		642	if (signals [signum].gotsig)
		643	ev_feed_signal_event (EV_A_ signum + 1);
		644	}
		645
		646	inline void
		647	fd_intern (int fd)
		648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
		653	fcntl (fd, F_SETFD, FD_CLOEXEC);
		654	fcntl (fd, F_SETFL, O_NONBLOCK);
		655	#endif
		656	}
		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
		663
		664	ev_io_set (&sigev, sigpipe [0], EV_READ);
		665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
		667	}
		668
		669	/*****************************************************************************/
		670
		671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
		675	static struct ev_signal childev;
		676
		677	#ifndef WCONTINUED
		678	# define WCONTINUED 0
		679	#endif
		680
		681	static void
		682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		683	{
		684	struct ev_child *w;
		685
		686	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		687	if (w->pid == pid || !w->pid)
		688	{
		689	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		690	w->rpid = pid;
		691	w->rstatus = status;
		692	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		693	}
		694	}
		695
		696	static void
		697	childcb (EV_P_ struct ev_signal *sw, int revents)
		698	{
		699	int pid, status;
		700
		701	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		702	{
		703	/* make sure we are called again until all childs have been reaped */
		704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		705
		706	child_reap (EV_A_ sw, pid, pid, status);
		707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
		709	}
		710
		711	#endif
		712
		713	/*****************************************************************************/
		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
188	#if HAVE_EPOLL	718	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	719	# include "ev_epoll.c"
190	#endif	720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
191	#if HAVE_SELECT	724	#if EV_USE_SELECT
192	# include "ev_select.c"	725	# include "ev_select.c"
193	#endif	726	#endif
194		727
195	int ev_init (int flags)	728	int
		729	ev_version_major (void)
196	{	730	{
		731	return EV_VERSION_MAJOR;
		732	}
		733
		734	int
		735	ev_version_minor (void)
		736	{
		737	return EV_VERSION_MINOR;
		738	}
		739
		740	/* return true if we are running with elevated privileges and should ignore env variables */
		741	static int
		742	enable_secure (void)
		743	{
		744	#ifdef _WIN32
		745	return 0;
		746	#else
		747	return getuid () != geteuid ()
		748	|| getgid () != getegid ();
		749	#endif
		750	}
		751
		752	unsigned int
		753	ev_method (EV_P)
		754	{
		755	return method;
		756	}
		757
		758	static void
		759	loop_init (EV_P_ unsigned int flags)
		760	{
		761	if (!method)
		762	{
197	#if HAVE_MONOTONIC	763	#if EV_USE_MONOTONIC
198	{	764	{
199	struct timespec ts;	765	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	767	have_monotonic = 1;
202	}	768	}
203	#endif	769	#endif
204		770
205	ev_now = ev_time ();	771	ev_rt_now = ev_time ();
		772	mn_now = get_clock ();
		773	now_floor = mn_now;
		774	rtmn_diff = ev_rt_now - mn_now;
206		775
		776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		777	flags = atoi (getenv ("LIBEV_FLAGS"));
		778
		779	if (!(flags & 0x0000ffff))
		780	flags |= 0x0000ffff;
		781
		782	method = 0;
		783	#if EV_USE_KQUEUE
		784	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		785	#endif
207	#if HAVE_EPOLL	786	#if EV_USE_EPOLL
208	if (epoll_init (flags))	787	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	788	#endif
		789	#if EV_USE_POLL
		790	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		791	#endif
211	#if HAVE_SELECT	792	#if EV_USE_SELECT
212	if (select_init (flags))	793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	794	#endif
215		795
216	ev_method = EVMETHOD_NONE;	796	ev_init (&sigev, sigcb);
217	return ev_method;	797	ev_set_priority (&sigev, EV_MAXPRI);
		798	}
218	}	799	}
219		800
220	void ev_prefork (void)	801	void
221	{	802	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	{	803	{
238	int i;	804	int i;
239		805
240	for (i = 0; i < pendingcnt; ++i)	806	#if EV_USE_KQUEUE
		807	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		808	#endif
		809	#if EV_USE_EPOLL
		810	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		811	#endif
		812	#if EV_USE_POLL
		813	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		814	#endif
		815	#if EV_USE_SELECT
		816	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		817	#endif
		818
		819	for (i = NUMPRI; i--; )
		820	array_free (pending, [i]);
		821
		822	/* have to use the microsoft-never-gets-it-right macro */
		823	array_free (fdchange, EMPTY0);
		824	array_free (timer, EMPTY0);
		825	#if EV_PERIODICS
		826	array_free (periodic, EMPTY0);
		827	#endif
		828	array_free (idle, EMPTY0);
		829	array_free (prepare, EMPTY0);
		830	array_free (check, EMPTY0);
		831
		832	method = 0;
		833	}
		834
		835	static void
		836	loop_fork (EV_P)
		837	{
		838	#if EV_USE_EPOLL
		839	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		840	#endif
		841	#if EV_USE_KQUEUE
		842	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		843	#endif
		844
		845	if (ev_is_active (&sigev))
		846	{
		847	/* default loop */
		848
		849	ev_ref (EV_A);
		850	ev_io_stop (EV_A_ &sigev);
		851	close (sigpipe [0]);
		852	close (sigpipe [1]);
		853
		854	while (pipe (sigpipe))
		855	syserr ("(libev) error creating pipe");
		856
		857	siginit (EV_A);
241	{	858	}
242	ANPENDING *p = pendings + i;
243		859
244	if (p->w)	860	postfork = 0;
		861	}
		862
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *
		865	ev_loop_new (unsigned int flags)
		866	{
		867	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		868
		869	memset (loop, 0, sizeof (struct ev_loop));
		870
		871	loop_init (EV_A_ flags);
		872
		873	if (ev_method (EV_A))
		874	return loop;
		875
		876	return 0;
		877	}
		878
		879	void
		880	ev_loop_destroy (EV_P)
		881	{
		882	loop_destroy (EV_A);
		883	ev_free (loop);
		884	}
		885
		886	void
		887	ev_loop_fork (EV_P)
		888	{
		889	postfork = 1;
		890	}
		891
		892	#endif
		893
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *
		896	ev_default_loop_ (unsigned int flags)
		897	#else
		898	int
		899	ev_default_loop (unsigned int flags)
		900	#endif
		901	{
		902	if (sigpipe [0] == sigpipe [1])
		903	if (pipe (sigpipe))
		904	return 0;
		905
		906	if (!ev_default_loop_ptr)
		907	{
		908	#if EV_MULTIPLICITY
		909	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		910	#else
		911	ev_default_loop_ptr = 1;
		912	#endif
		913
		914	loop_init (EV_A_ flags);
		915
		916	if (ev_method (EV_A))
245	{	917	{
246	p->w->pending = 0;	918	siginit (EV_A);
247	p->w->cb (p->w, p->events);	919
		920	#ifndef _WIN32
		921	ev_signal_init (&childev, childcb, SIGCHLD);
		922	ev_set_priority (&childev, EV_MAXPRI);
		923	ev_signal_start (EV_A_ &childev);
		924	ev_unref (EV_A); /* child watcher should not keep loop alive */
		925	#endif
248	}	926	}
		927	else
		928	ev_default_loop_ptr = 0;
		929	}
		930
		931	return ev_default_loop_ptr;
		932	}
		933
		934	void
		935	ev_default_destroy (void)
		936	{
		937	#if EV_MULTIPLICITY
		938	struct ev_loop *loop = ev_default_loop_ptr;
		939	#endif
		940
		941	#ifndef _WIN32
		942	ev_ref (EV_A); /* child watcher */
		943	ev_signal_stop (EV_A_ &childev);
		944	#endif
		945
		946	ev_ref (EV_A); /* signal watcher */
		947	ev_io_stop (EV_A_ &sigev);
		948
		949	close (sigpipe [0]); sigpipe [0] = 0;
		950	close (sigpipe [1]); sigpipe [1] = 0;
		951
		952	loop_destroy (EV_A);
		953	}
		954
		955	void
		956	ev_default_fork (void)
		957	{
		958	#if EV_MULTIPLICITY
		959	struct ev_loop *loop = ev_default_loop_ptr;
		960	#endif
		961
		962	if (method)
		963	postfork = 1;
		964	}
		965
		966	/*****************************************************************************/
		967
		968	static int
		969	any_pending (EV_P)
		970	{
		971	int pri;
		972
		973	for (pri = NUMPRI; pri--; )
		974	if (pendingcnt [pri])
		975	return 1;
		976
		977	return 0;
		978	}
		979
		980	static void
		981	call_pending (EV_P)
		982	{
		983	int pri;
		984
		985	for (pri = NUMPRI; pri--; )
		986	while (pendingcnt [pri])
		987	{
		988	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		989
		990	if (p->w)
		991	{
		992	p->w->pending = 0;
		993	EV_CB_INVOKE (p->w, p->events);
		994	}
249	}	995	}
250
251	pendingcnt = 0;
252	}	996	}
253		997
254	static void	998	static void
255	timer_reify (void)	999	timers_reify (EV_P)
256	{	1000	{
257	while (timercnt && timers [0]->at <= ev_now)	1001	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	1002	{
259	struct ev_timer *w = timers [0];	1003	struct ev_timer *w = timers [0];
260		1004
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	1005	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		1006
262	/* first reschedule timer */	1007	/* first reschedule or stop timer */
263	if (w->repeat)	1008	if (w->repeat)
264	{	1009	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1010	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)	1011
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	1012	((WT)w)->at += w->repeat;
		1013	if (((WT)w)->at < mn_now)
		1014	((WT)w)->at = mn_now;
270		1015
271	fprintf (stderr, "b %f\n", w->at);//D	1016	downheap ((WT *)timers, timercnt, 0);
272
273	downheap (0);
274	}	1017	}
275	else	1018	else
		1019	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1020
		1021	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1022	}
		1023	}
		1024
		1025	#if EV_PERIODICS
		1026	static void
		1027	periodics_reify (EV_P)
		1028	{
		1029	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1030	{
		1031	struct ev_periodic *w = periodics [0];
		1032
		1033	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1034
		1035	/* first reschedule or stop timer */
		1036	if (w->reschedule_cb)
276	{	1037	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	1038	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
278	evtimer_stop (w); /* nonrepeating: stop timer */	1039	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1040	downheap ((WT *)periodics, periodiccnt, 0);
279	}	1041	}
		1042	else if (w->interval)
		1043	{
		1044	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1045	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1046	downheap ((WT *)periodics, periodiccnt, 0);
		1047	}
		1048	else
		1049	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		1050
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	1051	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1052	}
		1053	}
		1054
		1055	static void
		1056	periodics_reschedule (EV_P)
		1057	{
		1058	int i;
		1059
		1060	/* adjust periodics after time jump */
		1061	for (i = 0; i < periodiccnt; ++i)
282	}	1062	{
283	}	1063	struct ev_periodic *w = periodics [i];
284		1064
285	int ev_loop_done;	1065	if (w->reschedule_cb)
		1066	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1067	else if (w->interval)
		1068	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1069	}
286		1070
		1071	/* now rebuild the heap */
		1072	for (i = periodiccnt >> 1; i--; )
		1073	downheap ((WT *)periodics, periodiccnt, i);
		1074	}
		1075	#endif
		1076
		1077	inline int
		1078	time_update_monotonic (EV_P)
		1079	{
		1080	mn_now = get_clock ();
		1081
		1082	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1083	{
		1084	ev_rt_now = rtmn_diff + mn_now;
		1085	return 0;
		1086	}
		1087	else
		1088	{
		1089	now_floor = mn_now;
		1090	ev_rt_now = ev_time ();
		1091	return 1;
		1092	}
		1093	}
		1094
		1095	static void
		1096	time_update (EV_P)
		1097	{
		1098	int i;
		1099
		1100	#if EV_USE_MONOTONIC
		1101	if (expect_true (have_monotonic))
		1102	{
		1103	if (time_update_monotonic (EV_A))
		1104	{
		1105	ev_tstamp odiff = rtmn_diff;
		1106
		1107	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1108	{
		1109	rtmn_diff = ev_rt_now - mn_now;
		1110
		1111	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1112	return; /* all is well */
		1113
		1114	ev_rt_now = ev_time ();
		1115	mn_now = get_clock ();
		1116	now_floor = mn_now;
		1117	}
		1118
		1119	# if EV_PERIODICS
		1120	periodics_reschedule (EV_A);
		1121	# endif
		1122	/* no timer adjustment, as the monotonic clock doesn't jump */
		1123	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1124	}
		1125	}
		1126	else
		1127	#endif
		1128	{
		1129	ev_rt_now = ev_time ();
		1130
		1131	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1132	{
		1133	#if EV_PERIODICS
		1134	periodics_reschedule (EV_A);
		1135	#endif
		1136
		1137	/* adjust timers. this is easy, as the offset is the same for all */
		1138	for (i = 0; i < timercnt; ++i)
		1139	((WT)timers [i])->at += ev_rt_now - mn_now;
		1140	}
		1141
		1142	mn_now = ev_rt_now;
		1143	}
		1144	}
		1145
		1146	void
		1147	ev_ref (EV_P)
		1148	{
		1149	++activecnt;
		1150	}
		1151
		1152	void
		1153	ev_unref (EV_P)
		1154	{
		1155	--activecnt;
		1156	}
		1157
		1158	static int loop_done;
		1159
		1160	void
287	int ev_loop (int flags)	1161	ev_loop (EV_P_ int flags)
288	{	1162	{
289	double block;	1163	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	1164	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
291		1165
292	do	1166	while (activecnt)
293	{	1167	{
		1168	/* queue check watchers (and execute them) */
		1169	if (expect_false (preparecnt))
		1170	{
		1171	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1172	call_pending (EV_A);
		1173	}
		1174
		1175	/* we might have forked, so reify kernel state if necessary */
		1176	if (expect_false (postfork))
		1177	loop_fork (EV_A);
		1178
294	/* update fd-related kernel structures */	1179	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	1180	fd_reify (EV_A);
296		1181
297	/* calculate blocking time */	1182	/* calculate blocking time */
		1183
		1184	/* we only need this for !monotonic clock or timers, but as we basically
		1185	always have timers, we just calculate it always */
		1186	#if EV_USE_MONOTONIC
		1187	if (expect_true (have_monotonic))
		1188	time_update_monotonic (EV_A);
		1189	else
		1190	#endif
		1191	{
298	ev_now = ev_time ();	1192	ev_rt_now = ev_time ();
		1193	mn_now = ev_rt_now;
		1194	}
299		1195
300	if (flags & EVLOOP_NONBLOCK)	1196	if (flags & EVLOOP_NONBLOCK || idlecnt)
301	block = 0.;	1197	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	1198	else
305	{	1199	{
		1200	block = MAX_BLOCKTIME;
		1201
		1202	if (timercnt)
		1203	{
306	block = timers [0]->at - ev_now + method_fudge;	1204	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1205	if (block > to) block = to;
		1206	}
		1207
		1208	#if EV_PERIODICS
		1209	if (periodiccnt)
		1210	{
		1211	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
		1212	if (block > to) block = to;
		1213	}
		1214	#endif
		1215
307	if (block < 0.) block = 0.;	1216	if (block < 0.) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	1217	}
310		1218
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	1219	method_poll (EV_A_ block);
313		1220
		1221	/* update ev_rt_now, do magic */
		1222	time_update (EV_A);
		1223
314	/* put pending timers into pendign queue and reschedule them */	1224	/* queue pending timers and reschedule them */
315	timer_reify ();	1225	timers_reify (EV_A); /* relative timers called last */
		1226	#if EV_PERIODICS
		1227	periodics_reify (EV_A); /* absolute timers called first */
		1228	#endif
316		1229
317	ev_now = ev_time ();	1230	/* queue idle watchers unless io or timers are pending */
		1231	if (idlecnt && !any_pending (EV_A))
		1232	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1233
		1234	/* queue check watchers, to be executed first */
		1235	if (checkcnt)
		1236	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1237
318	call_pending ();	1238	call_pending (EV_A);
319	}
320	while (!ev_loop_done);
321	}
322		1239
323	static void	1240	if (loop_done)
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1241	break;
		1242	}
		1243
		1244	if (loop_done != 2)
		1245	loop_done = 0;
		1246	}
		1247
		1248	void
		1249	ev_unloop (EV_P_ int how)
		1250	{
		1251	loop_done = how;
		1252	}
		1253
		1254	/*****************************************************************************/
		1255
		1256	inline void
		1257	wlist_add (WL *head, WL elem)
325	{	1258	{
326	elem->next = *head;	1259	elem->next = *head;
327	*head = elem;	1260	*head = elem;
328	}	1261	}
329		1262
330	static void	1263	inline void
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1264	wlist_del (WL *head, WL elem)
332	{	1265	{
333	while (*head)	1266	while (*head)
334	{	1267	{
335	if (*head == elem)	1268	if (*head == elem)
336	{	1269	{
…		…
340		1273
341	head = &(*head)->next;	1274	head = &(*head)->next;
342	}	1275	}
343	}	1276	}
344		1277
345	static void	1278	inline void
346	ev_start (struct ev_watcher *w, int active)	1279	ev_clear_pending (EV_P_ W w)
347	{	1280	{
		1281	if (w->pending)
		1282	{
		1283	pendings [ABSPRI (w)][w->pending - 1].w = 0;
348	w->pending = 0;	1284	w->pending = 0;
		1285	}
		1286	}
		1287
		1288	inline void
		1289	ev_start (EV_P_ W w, int active)
		1290	{
		1291	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1292	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1293
349	w->active = active;	1294	w->active = active;
		1295	ev_ref (EV_A);
350	}	1296	}
351		1297
352	static void	1298	inline void
353	ev_stop (struct ev_watcher *w)	1299	ev_stop (EV_P_ W w)
354	{	1300	{
355	if (w->pending)	1301	ev_unref (EV_A);
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	1302	w->active = 0;
359	/* nop */
360	}	1303	}
361		1304
		1305	/*****************************************************************************/
		1306
362	void	1307	void
363	evio_start (struct ev_io *w)	1308	ev_io_start (EV_P_ struct ev_io *w)
364	{	1309	{
		1310	int fd = w->fd;
		1311
365	if (ev_is_active (w))	1312	if (ev_is_active (w))
366	return;	1313	return;
367		1314
368	int fd = w->fd;	1315	assert (("ev_io_start called with negative fd", fd >= 0));
369		1316
370	ev_start ((struct ev_watcher *)w, 1);	1317	ev_start (EV_A_ (W)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1318	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1319	wlist_add ((WL *)&anfds[fd].head, (WL)w);
373		1320
374	++fdchangecnt;	1321	fd_change (EV_A_ fd);
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}	1322	}
378		1323
379	void	1324	void
380	evio_stop (struct ev_io *w)	1325	ev_io_stop (EV_P_ struct ev_io *w)
381	{	1326	{
		1327	ev_clear_pending (EV_A_ (W)w);
382	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
383	return;	1329	return;
384		1330
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1331	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		1332
388	++fdchangecnt;	1333	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1334	ev_stop (EV_A_ (W)w);
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}
392		1335
		1336	fd_change (EV_A_ w->fd);
		1337	}
		1338
393	void	1339	void
394	evtimer_start (struct ev_timer *w)	1340	ev_timer_start (EV_P_ struct ev_timer *w)
395	{	1341	{
396	if (ev_is_active (w))	1342	if (ev_is_active (w))
397	return;	1343	return;
398		1344
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1345	((WT)w)->at += mn_now;
400	if (w->is_abs)	1346
		1347	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1348
		1349	ev_start (EV_A_ (W)w, ++timercnt);
		1350	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
		1351	timers [timercnt - 1] = w;
		1352	upheap ((WT *)timers, timercnt - 1);
		1353
		1354	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1355	}
		1356
		1357	void
		1358	ev_timer_stop (EV_P_ struct ev_timer *w)
		1359	{
		1360	ev_clear_pending (EV_A_ (W)w);
		1361	if (!ev_is_active (w))
		1362	return;
		1363
		1364	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1365
		1366	if (((W)w)->active < timercnt--)
		1367	{
		1368	timers [((W)w)->active - 1] = timers [timercnt];
		1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
401	{	1370	}
402	/* this formula differs from the one in timer_reify becuse we do not round up */	1371
		1372	((WT)w)->at -= mn_now;
		1373
		1374	ev_stop (EV_A_ (W)w);
		1375	}
		1376
		1377	void
		1378	ev_timer_again (EV_P_ struct ev_timer *w)
		1379	{
		1380	if (ev_is_active (w))
		1381	{
403	if (w->repeat)	1382	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1383	{
		1384	((WT)w)->at = mn_now + w->repeat;
		1385	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1386	}
		1387	else
		1388	ev_timer_stop (EV_A_ w);
		1389	}
		1390	else if (w->repeat)
405	}	1391	{
		1392	w->at = w->repeat;
		1393	ev_timer_start (EV_A_ w);
		1394	}
		1395	}
		1396
		1397	#if EV_PERIODICS
		1398	void
		1399	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1400	{
		1401	if (ev_is_active (w))
		1402	return;
		1403
		1404	if (w->reschedule_cb)
		1405	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1406	else if (w->interval)
		1407	{
		1408	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1409	/* this formula differs from the one in periodic_reify because we do not always round up */
		1410	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1411	}
		1412
		1413	ev_start (EV_A_ (W)w, ++periodiccnt);
		1414	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1415	periodics [periodiccnt - 1] = w;
		1416	upheap ((WT *)periodics, periodiccnt - 1);
		1417
		1418	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1419	}
		1420
		1421	void
		1422	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1423	{
		1424	ev_clear_pending (EV_A_ (W)w);
		1425	if (!ev_is_active (w))
		1426	return;
		1427
		1428	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1429
		1430	if (((W)w)->active < periodiccnt--)
		1431	{
		1432	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1433	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1434	}
		1435
		1436	ev_stop (EV_A_ (W)w);
		1437	}
		1438
		1439	void
		1440	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1441	{
		1442	/* TODO: use adjustheap and recalculation */
		1443	ev_periodic_stop (EV_A_ w);
		1444	ev_periodic_start (EV_A_ w);
		1445	}
		1446	#endif
		1447
		1448	void
		1449	ev_idle_start (EV_P_ struct ev_idle *w)
		1450	{
		1451	if (ev_is_active (w))
		1452	return;
		1453
		1454	ev_start (EV_A_ (W)w, ++idlecnt);
		1455	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1456	idles [idlecnt - 1] = w;
		1457	}
		1458
		1459	void
		1460	ev_idle_stop (EV_P_ struct ev_idle *w)
		1461	{
		1462	ev_clear_pending (EV_A_ (W)w);
		1463	if (!ev_is_active (w))
		1464	return;
		1465
		1466	idles [((W)w)->active - 1] = idles [--idlecnt];
		1467	ev_stop (EV_A_ (W)w);
		1468	}
		1469
		1470	void
		1471	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1472	{
		1473	if (ev_is_active (w))
		1474	return;
		1475
		1476	ev_start (EV_A_ (W)w, ++preparecnt);
		1477	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1478	prepares [preparecnt - 1] = w;
		1479	}
		1480
		1481	void
		1482	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1483	{
		1484	ev_clear_pending (EV_A_ (W)w);
		1485	if (!ev_is_active (w))
		1486	return;
		1487
		1488	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1489	ev_stop (EV_A_ (W)w);
		1490	}
		1491
		1492	void
		1493	ev_check_start (EV_P_ struct ev_check *w)
		1494	{
		1495	if (ev_is_active (w))
		1496	return;
		1497
		1498	ev_start (EV_A_ (W)w, ++checkcnt);
		1499	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1500	checks [checkcnt - 1] = w;
		1501	}
		1502
		1503	void
		1504	ev_check_stop (EV_P_ struct ev_check *w)
		1505	{
		1506	ev_clear_pending (EV_A_ (W)w);
		1507	if (!ev_is_active (w))
		1508	return;
		1509
		1510	checks [((W)w)->active - 1] = checks [--checkcnt];
		1511	ev_stop (EV_A_ (W)w);
		1512	}
		1513
		1514	#ifndef SA_RESTART
		1515	# define SA_RESTART 0
		1516	#endif
		1517
		1518	void
		1519	ev_signal_start (EV_P_ struct ev_signal *w)
		1520	{
		1521	#if EV_MULTIPLICITY
		1522	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1523	#endif
		1524	if (ev_is_active (w))
		1525	return;
		1526
		1527	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1528
		1529	ev_start (EV_A_ (W)w, 1);
		1530	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1531	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1532
		1533	if (!((WL)w)->next)
		1534	{
		1535	#if _WIN32
		1536	signal (w->signum, sighandler);
		1537	#else
		1538	struct sigaction sa;
		1539	sa.sa_handler = sighandler;
		1540	sigfillset (&sa.sa_mask);
		1541	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1542	sigaction (w->signum, &sa, 0);
		1543	#endif
		1544	}
		1545	}
		1546
		1547	void
		1548	ev_signal_stop (EV_P_ struct ev_signal *w)
		1549	{
		1550	ev_clear_pending (EV_A_ (W)w);
		1551	if (!ev_is_active (w))
		1552	return;
		1553
		1554	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1555	ev_stop (EV_A_ (W)w);
		1556
		1557	if (!signals [w->signum - 1].head)
		1558	signal (w->signum, SIG_DFL);
		1559	}
		1560
		1561	void
		1562	ev_child_start (EV_P_ struct ev_child *w)
		1563	{
		1564	#if EV_MULTIPLICITY
		1565	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1566	#endif
		1567	if (ev_is_active (w))
		1568	return;
		1569
		1570	ev_start (EV_A_ (W)w, 1);
		1571	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1572	}
		1573
		1574	void
		1575	ev_child_stop (EV_P_ struct ev_child *w)
		1576	{
		1577	ev_clear_pending (EV_A_ (W)w);
		1578	if (!ev_is_active (w))
		1579	return;
		1580
		1581	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1582	ev_stop (EV_A_ (W)w);
		1583	}
		1584
		1585	/*****************************************************************************/
		1586
		1587	struct ev_once
		1588	{
		1589	struct ev_io io;
		1590	struct ev_timer to;
		1591	void (*cb)(int revents, void *arg);
		1592	void *arg;
		1593	};
		1594
		1595	static void
		1596	once_cb (EV_P_ struct ev_once *once, int revents)
		1597	{
		1598	void (*cb)(int revents, void *arg) = once->cb;
		1599	void *arg = once->arg;
		1600
		1601	ev_io_stop (EV_A_ &once->io);
		1602	ev_timer_stop (EV_A_ &once->to);
		1603	ev_free (once);
		1604
		1605	cb (revents, arg);
		1606	}
		1607
		1608	static void
		1609	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1610	{
		1611	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1612	}
		1613
		1614	static void
		1615	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1616	{
		1617	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1618	}
		1619
		1620	void
		1621	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1622	{
		1623	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
		1624
		1625	if (!once)
		1626	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
406	else	1627	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	}	1628	{
		1629	once->cb = cb;
		1630	once->arg = arg;
429		1631
430	ev_stop ((struct ev_watcher *)w);	1632	ev_init (&once->io, once_cb_io);
431	}	1633	if (fd >= 0)
		1634	{
		1635	ev_io_set (&once->io, fd, events);
		1636	ev_io_start (EV_A_ &once->io);
		1637	}
432		1638
433	void	1639	ev_init (&once->to, once_cb_to);
434	evsignal_start (struct ev_signal *w)	1640	if (timeout >= 0.)
435	{	1641	{
436	if (ev_is_active (w))	1642	ev_timer_set (&once->to, timeout, 0.);
437	return;	1643	ev_timer_start (EV_A_ &once->to);
438		1644	}
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	{	1645	}
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	}	1646	}
496		1647
		1648	#ifdef __cplusplus
		1649	}
497	#endif	1650	#endif
498		1651
499
500
501

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