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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 1.67 by root, Mon Nov 5 16:42:15 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	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
		59	#include <unistd.h>
		60	#include <fcntl.h>
		61	#include <signal.h>
		62	#include <stddef.h>
3		63
4	#include <stdio.h>	64	#include <stdio.h>
5		65
		66	#include <assert.h>
6	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
7	#include <sys/time.h>	72	#include <sys/time.h>
8	#include <time.h>	73	#include <time.h>
9		74
		75	/**/
		76
		77	#ifndef EV_USE_MONOTONIC
		78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
10	#ifdef CLOCK_MONOTONIC	111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	113	# define EV_USE_MONOTONIC 0
12	#endif	114	#endif
13		115
14	#define HAVE_EPOLL 1	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	118	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	119	#endif
17		120
18	#define MAX_BLOCKTIME 60.	121	/**/
		122
		123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
19		127
20	#include "ev.h"	128	#include "ev.h"
21		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		143
22	struct ev_watcher {	144	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);	145	typedef struct ev_watcher_list *WL;
		146	typedef struct ev_watcher_time *WT;
		147
		148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		149
		150	#if WIN32
		151	/* note: the comment below could not be substantiated, but what would I care */
		152	/* MSDN says this is required to handle SIGFPE */
		153	volatile double SIGFPE_REQ = 0.0f;
		154	#endif
		155
		156	/*****************************************************************************/
		157
		158	typedef struct
		159	{
		160	struct ev_watcher_list *head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
24	};	177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
25		180
26	struct ev_watcher_list {	181	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		182
30	ev_tstamp ev_now;	183	# define VAR(name,decl) static decl;
31	int ev_method;	184	# include "ev_vars.h"
		185	# undef VAR
32		186
33	static int have_monotonic; /* runtime */	187	#endif
34		188
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	189	/*****************************************************************************/
36	static void (*method_reify)(void);
37	static void (*method_poll)(ev_tstamp timeout);
38		190
39	ev_tstamp	191	inline ev_tstamp
40	ev_time (void)	192	ev_time (void)
41	{	193	{
42	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
43	struct timespec ts;	195	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	198	#else
47	struct timeval tv;	199	struct timeval tv;
48	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	202	#endif
51	}	203	}
52		204
53	static ev_tstamp	205	inline ev_tstamp
54	get_clock (void)	206	get_clock (void)
55	{	207	{
56	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
57	if (have_monotonic)	209	if (expect_true (have_monotonic))
58	{	210	{
59	struct timespec ts;	211	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	214	}
63	#endif	215	#endif
64		216
65	return ev_time ();	217	return ev_time ();
66	}	218	}
67		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) | 4 & ~3)
		227
68	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
70	{ \	230	{ \
71	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
74	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	240	cur = newcnt; \
76	}	241	}
77		242
78	typedef struct	243	#define array_slim(stem) \
79	{	244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
80	struct ev_io *head;	245	{ \
81	unsigned char wev, rev; /* want, received event set */	246	stem ## max = array_roundsize (stem ## cnt >> 1); \
82	} ANFD;	247	base = realloc (base, sizeof (*base) * (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		249	}
83		250
84	static ANFD *anfds;	251	#define array_free(stem, idx) \
85	static int anfdmax;	252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
86		253
87	static int *fdchanges;	254	/*****************************************************************************/
88	static int fdchangemax, fdchangecnt;
89		255
90	static void	256	static void
91	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
92	{	258	{
93	while (count--)	259	while (count--)
94	{	260	{
95	base->head = 0;	261	base->head = 0;
96	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
97	++base;	265	++base;
98	}	266	}
99	}	267	}
100		268
101	typedef struct
102	{
103	struct ev_watcher *w;
104	int events;
105	} ANPENDING;
106
107	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;
109
110	static void	269	static void
111	event (struct ev_watcher *w, int events)	270	event (EV_P_ W w, int events)
112	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
		276	}
		277
113	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
114	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
115	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
117	}	282	}
118		283
119	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
120	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
121	{	295	{
122	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
123	struct ev_io *w;	297	struct ev_io *w;
124		298
125	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126	{	300	{
127	int ev = w->events & events;	301	int ev = w->events & events;
128		302
129	if (ev)	303	if (ev)
130	event ((struct ev_watcher *)w, ev);	304	event (EV_A_ (W)w, ev);
		305	}
		306	}
		307
		308	/*****************************************************************************/
		309
		310	static void
		311	fd_reify (EV_P)
		312	{
		313	int i;
		314
		315	for (i = 0; i < fdchangecnt; ++i)
		316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		324	events |= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify || fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		357	}
		358	}
		359
		360	/* called on EBADF to verify fds */
		361	static void
		362	fd_ebadf (EV_P)
		363	{
		364	int fd;
		365
		366	for (fd = 0; fd < anfdmax; ++fd)
		367	if (anfds [fd].events)
		368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
		380	{
		381	close (fd);
		382	fd_kill (EV_A_ fd);
		383	return;
131	}	384	}
132	}	385	}
133		386
134	static struct ev_timer **timers;	387	/* susually called after fork if method needs to re-arm all fds from scratch */
135	static int timermax, timercnt;
136
137	static void	388	static void
138	upheap (int k)	389	fd_rearm_all (EV_P)
139	{	390	{
140	struct ev_timer *w = timers [k];	391	int fd;
141		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
		400	}
		401
		402	/*****************************************************************************/
		403
		404	static void
		405	upheap (WT *heap, int k)
		406	{
		407	WT w = heap [k];
		408
142	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
143	{	410	{
144	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
145	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
146	k >>= 1;	413	k >>= 1;
147	}	414	}
148		415
149	timers [k] = w;	416	heap [k] = w;
150	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
151		418
152	}	419	}
153		420
154	static void	421	static void
155	downheap (int k)	422	downheap (WT *heap, int N, int k)
156	{	423	{
157	struct ev_timer *w = timers [k];	424	WT w = heap [k];
158		425
159	while (k < (timercnt >> 1))	426	while (k < (N >> 1))
160	{	427	{
161	int j = k << 1;	428	int j = k << 1;
162		429
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164	++j;	431	++j;
165		432
166	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
167	break;	434	break;
168		435
169	timers [k] = timers [j];	436	heap [k] = heap [j];
170	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
171	k = j;	438	k = j;
172	}	439	}
173		440
174	timers [k] = w;	441	heap [k] = w;
175	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
176	}	443	}
177		444
178	static struct ev_signal **signals;	445	/*****************************************************************************/
		446
		447	typedef struct
		448	{
		449	struct ev_watcher_list *head;
		450	sig_atomic_t volatile gotsig;
		451	} ANSIG;
		452
		453	static ANSIG *signals;
179	static int signalmax, signalcnt;	454	static int signalmax;
180		455
		456	static int sigpipe [2];
		457	static sig_atomic_t volatile gotsig;
		458	static struct ev_io sigev;
		459
181	static void	460	static void
182	signals_init (struct ev_signal **base, int count)	461	signals_init (ANSIG *base, int count)
183	{	462	{
184	while (count--)	463	while (count--)
185	*base++ = 0;	464	{
186	}	465	base->head = 0;
		466	base->gotsig = 0;
187		467
		468	++base;
		469	}
		470	}
		471
		472	static void
		473	sighandler (int signum)
		474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
		479	signals [signum - 1].gotsig = 1;
		480
		481	if (!gotsig)
		482	{
		483	int old_errno = errno;
		484	gotsig = 1;
		485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
		487	}
		488	}
		489
		490	static void
		491	sigcb (EV_P_ struct ev_io *iow, int revents)
		492	{
		493	struct ev_watcher_list *w;
		494	int signum;
		495
		496	read (sigpipe [0], &revents, 1);
		497	gotsig = 0;
		498
		499	for (signum = signalmax; signum--; )
		500	if (signals [signum].gotsig)
		501	{
		502	signals [signum].gotsig = 0;
		503
		504	for (w = signals [signum].head; w; w = w->next)
		505	event (EV_A_ (W)w, EV_SIGNAL);
		506	}
		507	}
		508
		509	static void
		510	siginit (EV_P)
		511	{
		512	#ifndef WIN32
		513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		515
		516	/* rather than sort out wether we really need nb, set it */
		517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
		520
		521	ev_io_set (&sigev, sigpipe [0], EV_READ);
		522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
		524	}
		525
		526	/*****************************************************************************/
		527
		528	#ifndef WIN32
		529
		530	static struct ev_child *childs [PID_HASHSIZE];
		531	static struct ev_signal childev;
		532
		533	#ifndef WCONTINUED
		534	# define WCONTINUED 0
		535	#endif
		536
		537	static void
		538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		539	{
		540	struct ev_child *w;
		541
		542	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		543	if (w->pid == pid || !w->pid)
		544	{
		545	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		546	w->rpid = pid;
		547	w->rstatus = status;
		548	event (EV_A_ (W)w, EV_CHILD);
		549	}
		550	}
		551
		552	static void
		553	childcb (EV_P_ struct ev_signal *sw, int revents)
		554	{
		555	int pid, status;
		556
		557	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		558	{
		559	/* make sure we are called again until all childs have been reaped */
		560	event (EV_A_ (W)sw, EV_SIGNAL);
		561
		562	child_reap (EV_A_ sw, pid, pid, status);
		563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		564	}
		565	}
		566
		567	#endif
		568
		569	/*****************************************************************************/
		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
188	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	575	# include "ev_epoll.c"
190	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
191	#if HAVE_SELECT	580	#if EV_USE_SELECT
192	# include "ev_select.c"	581	# include "ev_select.c"
193	#endif	582	#endif
194		583
195	int ev_init (int flags)	584	int
		585	ev_version_major (void)
196	{	586	{
		587	return EV_VERSION_MAJOR;
		588	}
		589
		590	int
		591	ev_version_minor (void)
		592	{
		593	return EV_VERSION_MINOR;
		594	}
		595
		596	/* return true if we are running with elevated privileges and should ignore env variables */
		597	static int
		598	enable_secure (void)
		599	{
		600	#ifdef WIN32
		601	return 0;
		602	#else
		603	return getuid () != geteuid ()
		604	|| getgid () != getegid ();
		605	#endif
		606	}
		607
		608	int
		609	ev_method (EV_P)
		610	{
		611	return method;
		612	}
		613
		614	static void
		615	loop_init (EV_P_ int methods)
		616	{
		617	if (!method)
		618	{
197	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
198	{	620	{
199	struct timespec ts;	621	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	623	have_monotonic = 1;
202	}	624	}
203	#endif	625	#endif
204		626
205	ev_now = ev_time ();	627	rt_now = ev_time ();
		628	mn_now = get_clock ();
		629	now_floor = mn_now;
		630	rtmn_diff = rt_now - mn_now;
206		631
		632	if (methods == EVMETHOD_AUTO)
		633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		634	methods = atoi (getenv ("LIBEV_METHODS"));
		635	else
		636	methods = EVMETHOD_ANY;
		637
		638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		644	#endif
207	#if HAVE_EPOLL	645	#if EV_USE_EPOLL
208	if (epoll_init (flags))	646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
209	return ev_method;
210	#endif	647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		650	#endif
211	#if HAVE_SELECT	651	#if EV_USE_SELECT
212	if (select_init (flags))	652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
213	return ev_method;
214	#endif	653	#endif
215		654	}
216	ev_method = EVMETHOD_NONE;
217	return ev_method;
218	}	655	}
219		656
220	void ev_prefork (void)	657	void
221	{	658	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	{	659	{
238	int i;	660	int i;
239		661
240	for (i = 0; i < pendingcnt; ++i)	662	#if EV_USE_WIN32
241	{	663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
242	ANPENDING *p = pendings + i;	664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
243		677
244	if (p->w)	678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/*TODO*/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/*TODO*/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
		746	if (pipe (sigpipe))
		747	return 0;
		748
		749	if (!default_loop)
		750	{
		751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
		755	#endif
		756
		757	loop_init (EV_A_ methods);
		758
		759	if (ev_method (EV_A))
245	{	760	{
246	p->w->pending = 0;	761	ev_watcher_init (&sigev, sigcb);
247	p->w->cb (p->w, p->events);	762	ev_set_priority (&sigev, EV_MAXPRI);
		763	siginit (EV_A);
		764
		765	#ifndef WIN32
		766	ev_signal_init (&childev, childcb, SIGCHLD);
		767	ev_set_priority (&childev, EV_MAXPRI);
		768	ev_signal_start (EV_A_ &childev);
		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
		770	#endif
248	}	771	}
		772	else
		773	default_loop = 0;
		774	}
		775
		776	return default_loop;
		777	}
		778
		779	void
		780	ev_default_destroy (void)
		781	{
		782	#if EV_MULTIPLICITY
		783	struct ev_loop *loop = default_loop;
		784	#endif
		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
		790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
		808	close (sigpipe [0]);
		809	close (sigpipe [1]);
		810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
		813	siginit (EV_A);
		814	}
		815
		816	/*****************************************************************************/
		817
		818	static void
		819	call_pending (EV_P)
		820	{
		821	int pri;
		822
		823	for (pri = NUMPRI; pri--; )
		824	while (pendingcnt [pri])
		825	{
		826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		827
		828	if (p->w)
		829	{
		830	p->w->pending = 0;
		831	p->w->cb (EV_A_ p->w, p->events);
		832	}
249	}	833	}
250
251	pendingcnt = 0;
252	}	834	}
253		835
254	static void	836	static void
255	timer_reify (void)	837	timers_reify (EV_P)
256	{	838	{
257	while (timercnt && timers [0]->at <= ev_now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	840	{
259	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
260		842
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		844
262	/* first reschedule timer */	845	/* first reschedule or stop timer */
263	if (w->repeat)	846	if (w->repeat)
264	{	847	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
270		850	downheap ((WT *)timers, timercnt, 0);
271	fprintf (stderr, "b %f\n", w->at);//D
272
273	downheap (0);
274	}	851	}
275	else	852	else
		853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		854
		855	event (EV_A_ (W)w, EV_TIMEOUT);
		856	}
		857	}
		858
		859	static void
		860	periodics_reify (EV_P)
		861	{
		862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		863	{
		864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		867
		868	/* first reschedule or stop timer */
		869	if (w->interval)
276	{	870	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
278	evtimer_stop (w); /* nonrepeating: stop timer */	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		873	downheap ((WT *)periodics, periodiccnt, 0);
279	}	874	}
		875	else
		876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		877
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
		879	}
		880	}
		881
		882	static void
		883	periodics_reschedule (EV_P)
		884	{
		885	int i;
		886
		887	/* adjust periodics after time jump */
		888	for (i = 0; i < periodiccnt; ++i)
282	}	889	{
283	}	890	struct ev_periodic *w = periodics [i];
284		891
285	int ev_loop_done;	892	if (w->interval)
		893	{
		894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
286		895
		896	if (fabs (diff) >= 1e-4)
		897	{
		898	ev_periodic_stop (EV_A_ w);
		899	ev_periodic_start (EV_A_ w);
		900
		901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		902	}
		903	}
		904	}
		905	}
		906
		907	inline int
		908	time_update_monotonic (EV_P)
		909	{
		910	mn_now = get_clock ();
		911
		912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		913	{
		914	rt_now = rtmn_diff + mn_now;
		915	return 0;
		916	}
		917	else
		918	{
		919	now_floor = mn_now;
		920	rt_now = ev_time ();
		921	return 1;
		922	}
		923	}
		924
		925	static void
		926	time_update (EV_P)
		927	{
		928	int i;
		929
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	{
		933	if (time_update_monotonic (EV_A))
		934	{
		935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
		939	rtmn_diff = rt_now - mn_now;
		940
		941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		942	return; /* all is well */
		943
		944	rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	}
		948
		949	periodics_reschedule (EV_A);
		950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		952	}
		953	}
		954	else
		955	#endif
		956	{
		957	rt_now = ev_time ();
		958
		959	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		960	{
		961	periodics_reschedule (EV_A);
		962
		963	/* adjust timers. this is easy, as the offset is the same for all */
		964	for (i = 0; i < timercnt; ++i)
		965	((WT)timers [i])->at += rt_now - mn_now;
		966	}
		967
		968	mn_now = rt_now;
		969	}
		970	}
		971
		972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
287	int ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
288	{	988	{
289	double block;	989	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
291		991
292	do	992	do
293	{	993	{
		994	/* queue check watchers (and execute them) */
		995	if (expect_false (preparecnt))
		996	{
		997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		998	call_pending (EV_A);
		999	}
		1000
294	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	1002	fd_reify (EV_A);
296		1003
297	/* calculate blocking time */	1004	/* calculate blocking time */
		1005
		1006	/* we only need this for !monotonic clockor timers, but as we basically
		1007	always have timers, we just calculate it always */
		1008	#if EV_USE_MONOTONIC
		1009	if (expect_true (have_monotonic))
		1010	time_update_monotonic (EV_A);
		1011	else
		1012	#endif
		1013	{
298	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
299		1017
300	if (flags & EVLOOP_NONBLOCK)	1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
301	block = 0.;	1019	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	1020	else
305	{	1021	{
		1022	block = MAX_BLOCKTIME;
		1023
		1024	if (timercnt)
		1025	{
306	block = timers [0]->at - ev_now + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1027	if (block > to) block = to;
		1028	}
		1029
		1030	if (periodiccnt)
		1031	{
		1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
		1033	if (block > to) block = to;
		1034	}
		1035
307	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	1037	}
310		1038
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	1039	method_poll (EV_A_ block);
313		1040
		1041	/* update rt_now, do magic */
		1042	time_update (EV_A);
		1043
314	/* put pending timers into pendign queue and reschedule them */	1044	/* queue pending timers and reschedule them */
315	timer_reify ();	1045	timers_reify (EV_A); /* relative timers called last */
		1046	periodics_reify (EV_A); /* absolute timers called first */
316		1047
317	ev_now = ev_time ();	1048	/* queue idle watchers unless io or timers are pending */
		1049	if (!pendingcnt)
		1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1051
		1052	/* queue check watchers, to be executed first */
		1053	if (checkcnt)
		1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1055
318	call_pending ();	1056	call_pending (EV_A);
319	}	1057	}
320	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
321	}
322		1059
323	static void	1060	if (loop_done != 2)
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
		1068	}
		1069
		1070	/*****************************************************************************/
		1071
		1072	inline void
		1073	wlist_add (WL *head, WL elem)
325	{	1074	{
326	elem->next = *head;	1075	elem->next = *head;
327	*head = elem;	1076	*head = elem;
328	}	1077	}
329		1078
330	static void	1079	inline void
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1080	wlist_del (WL *head, WL elem)
332	{	1081	{
333	while (*head)	1082	while (*head)
334	{	1083	{
335	if (*head == elem)	1084	if (*head == elem)
336	{	1085	{
…		…
340		1089
341	head = &(*head)->next;	1090	head = &(*head)->next;
342	}	1091	}
343	}	1092	}
344		1093
345	static void	1094	inline void
346	ev_start (struct ev_watcher *w, int active)	1095	ev_clear_pending (EV_P_ W w)
347	{	1096	{
		1097	if (w->pending)
		1098	{
		1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
348	w->pending = 0;	1100	w->pending = 0;
		1101	}
		1102	}
		1103
		1104	inline void
		1105	ev_start (EV_P_ W w, int active)
		1106	{
		1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
349	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
350	}	1112	}
351		1113
352	static void	1114	inline void
353	ev_stop (struct ev_watcher *w)	1115	ev_stop (EV_P_ W w)
354	{	1116	{
355	if (w->pending)	1117	ev_unref (EV_A);
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	1118	w->active = 0;
359	/* nop */
360	}	1119	}
361		1120
		1121	/*****************************************************************************/
		1122
362	void	1123	void
363	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
364	{	1125	{
		1126	int fd = w->fd;
		1127
365	if (ev_is_active (w))	1128	if (ev_is_active (w))
366	return;	1129	return;
367		1130
368	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
369		1132
370	ev_start ((struct ev_watcher *)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
373		1136
374	++fdchangecnt;	1137	fd_change (EV_A_ fd);
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}	1138	}
378		1139
379	void	1140	void
380	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
381	{	1142	{
		1143	ev_clear_pending (EV_A_ (W)w);
382	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
383	return;	1145	return;
384		1146
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
386	ev_stop ((struct ev_watcher *)w);	1148	ev_stop (EV_A_ (W)w);
387		1149
388	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}	1151	}
392		1152
393	void	1153	void
394	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
395	{	1155	{
396	if (ev_is_active (w))	1156	if (ev_is_active (w))
397	return;	1157	return;
398		1158
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1159	((WT)w)->at += mn_now;
400	if (w->is_abs)
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409		1160
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1162
		1163	ev_start (EV_A_ (W)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
414	}
415		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
416	void	1171	void
417	evtimer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
418	{	1173	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	1174	ev_clear_pending (EV_A_ (W)w);
420	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
421	return;	1176	return;
422		1177
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D	1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
424	if (w->active < timercnt)	1180	if (((W)w)->active < timercnt--)
425	{	1181	{
426	timers [w->active - 1] = timers [--timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
427	downheap (w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
428	}	1184	}
429		1185
430	ev_stop ((struct ev_watcher *)w);	1186	((WT)w)->at = w->repeat;
431	}
432		1187
		1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
433	void	1191	void
434	evsignal_start (struct ev_signal *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
435	{	1193	{
436	if (ev_is_active (w))	1194	if (ev_is_active (w))
437	return;	1195	{
		1196	if (w->repeat)
		1197	{
		1198	((WT)w)->at = mn_now + w->repeat;
		1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1200	}
		1201	else
		1202	ev_timer_stop (EV_A_ w);
		1203	}
		1204	else if (w->repeat)
		1205	ev_timer_start (EV_A_ w);
		1206	}
438		1207
439	ev_start ((struct ev_watcher *)w, 1);	1208	void
		1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1215
		1216	/* this formula differs from the one in periodic_reify because we do not always round up */
		1217	if (w->interval)
		1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1219
		1220	ev_start (EV_A_ (W)w, ++periodiccnt);
		1221	array_needsize (periodics, periodicmax, periodiccnt, );
		1222	periodics [periodiccnt - 1] = w;
		1223	upheap ((WT *)periodics, periodiccnt - 1);
		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
		1228	void
		1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1230	{
		1231	ev_clear_pending (EV_A_ (W)w);
		1232	if (!ev_is_active (w))
		1233	return;
		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
		1237	if (((W)w)->active < periodiccnt--)
		1238	{
		1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1241	}
		1242
		1243	ev_stop (EV_A_ (W)w);
		1244	}
		1245
		1246	void
		1247	ev_idle_start (EV_P_ struct ev_idle *w)
		1248	{
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
		1309	ev_stop (EV_A_ (W)w);
		1310	}
		1311
		1312	#ifndef SA_RESTART
		1313	# define SA_RESTART 0
		1314	#endif
		1315
		1316	void
		1317	ev_signal_start (EV_P_ struct ev_signal *w)
		1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
		1322	if (ev_is_active (w))
		1323	return;
		1324
		1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1326
		1327	ev_start (EV_A_ (W)w, 1);
440	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
442	}
443		1330
		1331	if (!((WL)w)->next)
		1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
		1336	struct sigaction sa;
		1337	sa.sa_handler = sighandler;
		1338	sigfillset (&sa.sa_mask);
		1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1340	sigaction (w->signum, &sa, 0);
		1341	#endif
		1342	}
		1343	}
		1344
444	void	1345	void
445	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
446	{	1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
447	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
448	return;	1350	return;
449		1351
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
451	ev_stop ((struct ev_watcher *)w);	1353	ev_stop (EV_A_ (W)w);
		1354
		1355	if (!signals [w->signum - 1].head)
		1356	signal (w->signum, SIG_DFL);
		1357	}
		1358
		1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
		1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
		1365	if (ev_is_active (w))
		1366	return;
		1367
		1368	ev_start (EV_A_ (W)w, 1);
		1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1370	}
		1371
		1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
		1374	{
		1375	ev_clear_pending (EV_A_ (W)w);
		1376	if (ev_is_active (w))
		1377	return;
		1378
		1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1380	ev_stop (EV_A_ (W)w);
452	}	1381	}
453		1382
454	/*****************************************************************************/	1383	/*****************************************************************************/
455	#if 1
456		1384
457	static void	1385	struct ev_once
458	sin_cb (struct ev_io *w, int revents)
459	{	1386	{
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;	1387	struct ev_io io;
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];	1388	struct ev_timer to;
		1389	void (*cb)(int revents, void *arg);
		1390	void *arg;
		1391	};
480		1392
481	int i;	1393	static void
482	for (i = 0; i < 1000; ++i)	1394	once_cb (EV_P_ struct ev_once *once, int revents)
483	{	1395	{
484	struct ev_timer *w = t + i;	1396	void (*cb)(int revents, void *arg) = once->cb;
485	evw_init (w, ocb, i);	1397	void *arg = once->arg;
486	evtimer_set_rel (w, drand48 (), 0);	1398
487	evtimer_start (w);	1399	ev_io_stop (EV_A_ &once->io);
488	if (drand48 () < 0.5)	1400	ev_timer_stop (EV_A_ &once->to);
489	evtimer_stop (w);	1401	free (once);
		1402
		1403	cb (revents, arg);
		1404	}
		1405
		1406	static void
		1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1408	{
		1409	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1410	}
		1411
		1412	static void
		1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1414	{
		1415	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1416	}
		1417
		1418	void
		1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1420	{
		1421	struct ev_once *once = malloc (sizeof (struct ev_once));
		1422
		1423	if (!once)
		1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1425	else
490	}	1426	{
		1427	once->cb = cb;
		1428	once->arg = arg;
491		1429
492	ev_loop (0);	1430	ev_watcher_init (&once->io, once_cb_io);
		1431	if (fd >= 0)
		1432	{
		1433	ev_io_set (&once->io, fd, events);
		1434	ev_io_start (EV_A_ &once->io);
		1435	}
493		1436
494	return 0;	1437	ev_watcher_init (&once->to, once_cb_to);
		1438	if (timeout >= 0.)
		1439	{
		1440	ev_timer_set (&once->to, timeout, 0.);
		1441	ev_timer_start (EV_A_ &once->to);
		1442	}
		1443	}
495	}	1444	}
496		1445
497	#endif
498
499
500
501

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