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Comparing libev/ev.c (file contents):
Revision 1.5 by root, Tue Oct 30 23:54:38 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 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	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
		37	#include <unistd.h>
		38	#include <fcntl.h>
		39	#include <signal.h>
		40	#include <stddef.h>
3		41
4	#include <stdio.h>	42	#include <stdio.h>
5		43
6	#include <assert.h>	44	#include <assert.h>
7	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
8	#include <sys/time.h>	50	#include <sys/time.h>
9	#include <time.h>	51	#include <time.h>
10		52
		53	/**/
		54
		55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
11	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
13	#endif	84	#endif
14		85
15	#define HAVE_EPOLL 1	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
16	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
17	#define HAVE_SELECT 1	89	#endif
		90
		91	/**/
18		92
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
21		97
22	#include "ev.h"	98	#include "ev.h"
23		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
24	struct ev_watcher {	114	typedef struct ev_watcher *W;
25	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		119
		120	/*****************************************************************************/
		121
		122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#ifdef EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
26	};	141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
27		144
28	struct ev_watcher_list {	145	#else
29	EV_WATCHER_LIST (ev_watcher_list);
30	};
31		146
32	static ev_tstamp now, diff; /* monotonic clock */	147	# define VAR(name,decl) static decl;
33	ev_tstamp ev_now;	148	# include "ev_vars.h"
34	int ev_method;	149	# undef VAR
35		150
36	static int have_monotonic; /* runtime */	151	#endif
37		152
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	153	/*****************************************************************************/
39	static void (*method_modify)(int fd, int oev, int nev);
40	static void (*method_poll)(ev_tstamp timeout);
41		154
42	ev_tstamp	155	inline ev_tstamp
43	ev_time (void)	156	ev_time (void)
44	{	157	{
45	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
46	struct timespec ts;	159	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	162	#else
50	struct timeval tv;	163	struct timeval tv;
51	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	166	#endif
54	}	167	}
55		168
56	static ev_tstamp	169	inline ev_tstamp
57	get_clock (void)	170	get_clock (void)
58	{	171	{
59	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
60	if (have_monotonic)	173	if (expect_true (have_monotonic))
61	{	174	{
62	struct timespec ts;	175	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	178	}
66	#endif	179	#endif
67		180
68	return ev_time ();	181	return ev_time ();
69	}	182	}
70		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) | 4 & ~3)
		191
71	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
72	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
73	{ \	194	{ \
74	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
77	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	204	cur = newcnt; \
79	}	205	}
80		206
81	typedef struct	207	/*****************************************************************************/
82	{
83	struct ev_io *head;
84	unsigned char wev, rev; /* want, received event set */
85	} ANFD;
86
87	static ANFD *anfds;
88	static int anfdmax;
89
90	static int *fdchanges;
91	static int fdchangemax, fdchangecnt;
92		208
93	static void	209	static void
94	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
95	{	211	{
96	while (count--)	212	while (count--)
97	{	213	{
98	base->head = 0;	214	base->head = 0;
99	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
100	++base;	218	++base;
101	}	219	}
102	}	220	}
103		221
104	typedef struct
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void	222	static void
114	event (struct ev_watcher *w, int events)	223	event (EV_P_ W w, int events)
115	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
116	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
117	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
118	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
119	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
120	}	235	}
121		236
122	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
123	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
124	{	248	{
125	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	250	struct ev_io *w;
127		251
128	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
129	{	253	{
130	int ev = w->events & events;	254	int ev = w->events & events;
131		255
132	if (ev)	256	if (ev)
133	event ((struct ev_watcher *)w, ev);	257	event (EV_A_ (W)w, ev);
134	}
135	}
136
137	static struct ev_timer **atimers;
138	static int atimermax, atimercnt;
139
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void
144	upheap (struct ev_timer **timers, int k)
145	{
146	struct ev_timer *w = timers [k];
147
148	while (k && timers [k >> 1]->at > w->at)
149	{	258	}
150	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;
152	k >>= 1;
153	}
154
155	timers [k] = w;
156	timers [k]->active = k + 1;
157
158	}	259	}
159		260
160	static void	261	/*****************************************************************************/
161	downheap (struct ev_timer **timers, int N, int k)
162	{
163	struct ev_timer *w = timers [k];
164		262
165	while (k < (N >> 1))
166	{
167	int j = k << 1;
168
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
170	++j;
171
172	if (w->at <= timers [j]->at)
173	break;
174
175	timers [k] = timers [j];
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}
183
184	static struct ev_signal **signals;
185	static int signalmax;
186
187	static void	263	static void
188	signals_init (struct ev_signal **base, int count)	264	fd_reify (EV_P)
189	{
190	while (count--)
191	*base++ = 0;
192	}
193
194	#if HAVE_EPOLL
195	# include "ev_epoll.c"
196	#endif
197	#if HAVE_SELECT
198	# include "ev_select.c"
199	#endif
200
201	int ev_init (int flags)
202	{
203	#if HAVE_MONOTONIC
204	{
205	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;
208	}
209	#endif
210
211	ev_now = ev_time ();
212	now = get_clock ();
213	diff = ev_now - now;
214
215	#if HAVE_EPOLL
216	if (epoll_init (flags))
217	return ev_method;
218	#endif
219	#if HAVE_SELECT
220	if (select_init (flags))
221	return ev_method;
222	#endif
223
224	ev_method = EVMETHOD_NONE;
225	return ev_method;
226	}
227
228	void ev_prefork (void)
229	{
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();
241	#endif
242	}
243
244	static void
245	fd_reify (void)
246	{	265	{
247	int i;	266	int i;
248		267
249	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
250	{	269	{
251	int fd = fdchanges [i];	270	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
253	struct ev_io *w;	272	struct ev_io *w;
254		273
255	int wev = 0;	274	int events = 0;
256		275
257	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
258	wev |= w->events;	277	events |= w->events;
259		278
		279	anfd->reify = 0;
		280
260	if (anfd->wev != wev)	281	if (anfd->events != events)
261	{	282	{
262	method_modify (fd, anfd->wev, wev);	283	method_modify (EV_A_ fd, anfd->events, events);
263	anfd->wev = wev;	284	anfd->events = events;
264	}	285	}
265	}	286	}
266		287
267	fdchangecnt = 0;	288	fdchangecnt = 0;
268	}	289	}
269		290
270	static void	291	static void
271	call_pending ()	292	fd_change (EV_P_ int fd)
272	{	293	{
		294	if (anfds [fd].reify || fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
273	int i;	320	int fd;
274		321
275	for (i = 0; i < pendingcnt; ++i)	322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
276	{	336	{
277	ANPENDING *p = pendings + i;	337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
		341	}
278		342
279	if (p->w)	343	/*****************************************************************************/
		344
		345	static void
		346	upheap (WT *heap, int k)
		347	{
		348	WT w = heap [k];
		349
		350	while (k && heap [k >> 1]->at > w->at)
		351	{
		352	heap [k] = heap [k >> 1];
		353	heap [k]->active = k + 1;
		354	k >>= 1;
		355	}
		356
		357	heap [k] = w;
		358	heap [k]->active = k + 1;
		359
		360	}
		361
		362	static void
		363	downheap (WT *heap, int N, int k)
		364	{
		365	WT w = heap [k];
		366
		367	while (k < (N >> 1))
		368	{
		369	int j = k << 1;
		370
		371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		372	++j;
		373
		374	if (w->at <= heap [j]->at)
		375	break;
		376
		377	heap [k] = heap [j];
		378	heap [k]->active = k + 1;
		379	k = j;
		380	}
		381
		382	heap [k] = w;
		383	heap [k]->active = k + 1;
		384	}
		385
		386	/*****************************************************************************/
		387
		388	typedef struct
		389	{
		390	struct ev_watcher_list *head;
		391	sig_atomic_t volatile gotsig;
		392	} ANSIG;
		393
		394	static ANSIG *signals;
		395	static int signalmax;
		396
		397	static int sigpipe [2];
		398	static sig_atomic_t volatile gotsig;
		399
		400	static void
		401	signals_init (ANSIG *base, int count)
		402	{
		403	while (count--)
		404	{
		405	base->head = 0;
		406	base->gotsig = 0;
		407
		408	++base;
		409	}
		410	}
		411
		412	static void
		413	sighandler (int signum)
		414	{
		415	signals [signum - 1].gotsig = 1;
		416
		417	if (!gotsig)
		418	{
		419	int old_errno = errno;
		420	gotsig = 1;
		421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
		423	}
		424	}
		425
		426	static void
		427	sigcb (EV_P_ struct ev_io *iow, int revents)
		428	{
		429	struct ev_watcher_list *w;
		430	int signum;
		431
		432	read (sigpipe [0], &revents, 1);
		433	gotsig = 0;
		434
		435	for (signum = signalmax; signum--; )
		436	if (signals [signum].gotsig)
		437	{
		438	signals [signum].gotsig = 0;
		439
		440	for (w = signals [signum].head; w; w = w->next)
		441	event (EV_A_ (W)w, EV_SIGNAL);
		442	}
		443	}
		444
		445	static void
		446	siginit (EV_P)
		447	{
		448	#ifndef WIN32
		449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		451
		452	/* rather than sort out wether we really need nb, set it */
		453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
		456
		457	ev_io_set (&sigev, sigpipe [0], EV_READ);
		458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
		460	}
		461
		462	/*****************************************************************************/
		463
		464	#ifndef WIN32
		465
		466	#ifndef WCONTINUED
		467	# define WCONTINUED 0
		468	#endif
		469
		470	static void
		471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		472	{
		473	struct ev_child *w;
		474
		475	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		476	if (w->pid == pid || !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it *now* */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
		488	int pid, status;
		489
		490	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		491	{
		492	/* make sure we are called again until all childs have been reaped */
		493	event (EV_A_ (W)sw, EV_SIGNAL);
		494
		495	child_reap (EV_A_ sw, pid, pid, status);
		496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
		498	}
		499
		500	#endif
		501
		502	/*****************************************************************************/
		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
		507	#if EV_USE_EPOLL
		508	# include "ev_epoll.c"
		509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
		513	#if EV_USE_SELECT
		514	# include "ev_select.c"
		515	#endif
		516
		517	int
		518	ev_version_major (void)
		519	{
		520	return EV_VERSION_MAJOR;
		521	}
		522
		523	int
		524	ev_version_minor (void)
		525	{
		526	return EV_VERSION_MINOR;
		527	}
		528
		529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
		532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	|| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	static void
		548	loop_init (EV_P_ int methods)
		549	{
		550	if (!method)
		551	{
		552	#if EV_USE_MONOTONIC
		553	{
		554	struct timespec ts;
		555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		556	have_monotonic = 1;
		557	}
		558	#endif
		559
		560	rt_now = ev_time ();
		561	mn_now = get_clock ();
		562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
		564
		565	if (pipe (sigpipe))
		566	return 0;
		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
		572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
		578	#if EV_USE_EPOLL
		579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
		584	#if EV_USE_SELECT
		585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		586	#endif
		587
		588	if (method)
280	{	589	{
281	p->w->pending = 0;	590	ev_watcher_init (&sigev, sigcb);
282	p->w->cb (p->w, p->events);	591	ev_set_priority (&sigev, EV_MAXPRI);
		592	siginit (EV_A);
		593
		594	#ifndef WIN32
		595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
		597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
283	}	600	}
284	}	601	}
285		602
286	pendingcnt = 0;	603	return method;
287	}	604	}
288		605
289	static void	606	#ifdef EV_MULTIPLICITY
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
291	{	610	{
		611	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		612
		613	loop_init (EV_A_ methods);
		614
		615	return loop;
		616	}
		617
		618	void
		619	ev_loop_delete (EV_P)
		620	{
		621	/*TODO*/
		622	free (loop);
		623	}
		624
		625	#else
		626
		627	int
		628	ev_init (int methods)
		629	{
		630	loop_init ();
		631	}
		632
		633	#endif
		634
		635	/*****************************************************************************/
		636
		637	void
		638	ev_fork_prepare (void)
		639	{
		640	/* nop */
		641	}
		642
		643	void
		644	ev_fork_parent (void)
		645	{
		646	/* nop */
		647	}
		648
		649	void
		650	ev_fork_child (void)
		651	{
		652	/*TODO*/
		653	#if !EV_MULTIPLICITY
		654	#if EV_USE_EPOLL
		655	if (method == EVMETHOD_EPOLL)
		656	epoll_postfork_child (EV_A);
		657	#endif
		658
		659	ev_io_stop (EV_A_ &sigev);
		660	close (sigpipe [0]);
		661	close (sigpipe [1]);
		662	pipe (sigpipe);
		663	siginit (EV_A);
		664	#endif
		665	}
		666
		667	/*****************************************************************************/
		668
		669	static void
		670	call_pending (EV_P)
		671	{
		672	int pri;
		673
		674	for (pri = NUMPRI; pri--; )
		675	while (pendingcnt [pri])
		676	{
		677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		678
		679	if (p->w)
		680	{
		681	p->w->pending = 0;
		682	p->w->cb (EV_A_ p->w, p->events);
		683	}
		684	}
		685	}
		686
		687	static void
		688	timers_reify (EV_P)
		689	{
292	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
293	{	691	{
294	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
295		693
296	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
297	if (w->repeat)	695	if (w->repeat)
298	{	696	{
299	if (w->is_abs)	697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
301	else
302	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
303
304	assert (w->at > now);
305
306	downheap (timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
307	}	700	}
308	else	701	else
		702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		703
		704	event (EV_A_ (W)w, EV_TIMEOUT);
		705	}
		706	}
		707
		708	static void
		709	periodics_reify (EV_P)
		710	{
		711	while (periodiccnt && periodics [0]->at <= rt_now)
		712	{
		713	struct ev_periodic *w = periodics [0];
		714
		715	/* first reschedule or stop timer */
		716	if (w->interval)
309	{	717	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
311	--timercnt; /* maybe pass by reference instead? */	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		720	downheap ((WT *)periodics, periodiccnt, 0);
312	}	721	}
		722	else
		723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		724
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	725	event (EV_A_ (W)w, EV_PERIODIC);
315	}	726	}
316	}	727	}
317		728
318	static void	729	static void
319	time_update ()	730	periodics_reschedule (EV_P)
320	{	731	{
321	int i;	732	int i;
322	ev_now = ev_time ();
323		733
324	if (have_monotonic)	734	/* adjust periodics after time jump */
		735	for (i = 0; i < periodiccnt; ++i)
325	{	736	{
326	ev_tstamp odiff = diff;	737	struct ev_periodic *w = periodics [i];
327		738
328	/* detecting time jumps is much more difficult */	739	if (w->interval)
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */
330	{	740	{
331	now = get_clock ();	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
332	diff = ev_now - now;
333		742
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	743	if (fabs (diff) >= 1e-4)
335	return; /* all is well */	744	{
		745	ev_periodic_stop (EV_A_ w);
		746	ev_periodic_start (EV_A_ w);
336		747
337	ev_now = ev_time ();	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		749	}
338	}	750	}
		751	}
		752	}
339		753
340	/* time jump detected, reschedule atimers */	754	inline int
341	for (i = 0; i < atimercnt; ++i)	755	time_update_monotonic (EV_P)
		756	{
		757	mn_now = get_clock ();
		758
		759	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		760	{
		761	rt_now = rtmn_diff + mn_now;
		762	return 0;
		763	}
		764	else
		765	{
		766	now_floor = mn_now;
		767	rt_now = ev_time ();
		768	return 1;
		769	}
		770	}
		771
		772	static void
		773	time_update (EV_P)
		774	{
		775	int i;
		776
		777	#if EV_USE_MONOTONIC
		778	if (expect_true (have_monotonic))
		779	{
		780	if (time_update_monotonic (EV_A))
342	{	781	{
343	struct ev_timer *w = atimers [i];	782	ev_tstamp odiff = rtmn_diff;
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
		786	rtmn_diff = rt_now - mn_now;
		787
		788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		789	return; /* all is well */
		790
		791	rt_now = ev_time ();
		792	mn_now = get_clock ();
		793	now_floor = mn_now;
		794	}
		795
		796	periodics_reschedule (EV_A);
		797	/* no timer adjustment, as the monotonic clock doesn't jump */
		798	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
345	}	799	}
346	}	800	}
347	else	801	else
		802	#endif
348	{	803	{
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
350	/* time jump detected, adjust rtimers */	805
		806	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		807	{
		808	periodics_reschedule (EV_A);
		809
		810	/* adjust timers. this is easy, as the offset is the same for all */
351	for (i = 0; i < rtimercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
352	rtimers [i]->at += ev_now - now;	812	timers [i]->at += rt_now - mn_now;
		813	}
353		814
354	now = ev_now;	815	mn_now = rt_now;
355	}	816	}
356	}	817	}
357		818
358	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
359		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
360	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
361	{	835	{
362	double block;	836	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	837	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
364		838
365	do	839	do
366	{	840	{
		841	/* queue check watchers (and execute them) */
		842	if (expect_false (preparecnt))
		843	{
		844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		845	call_pending (EV_A);
		846	}
		847
367	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
368	fd_reify ();	849	fd_reify (EV_A);
369		850
370	/* calculate blocking time */	851	/* calculate blocking time */
		852
		853	/* we only need this for !monotonic clockor timers, but as we basically
		854	always have timers, we just calculate it always */
		855	#if EV_USE_MONOTONIC
		856	if (expect_true (have_monotonic))
		857	time_update_monotonic (EV_A);
		858	else
		859	#endif
		860	{
		861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
		864
371	if (flags & EVLOOP_NONBLOCK)	865	if (flags & EVLOOP_NONBLOCK || idlecnt)
372	block = 0.;	866	block = 0.;
373	else	867	else
374	{	868	{
375	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
376		870
377	if (rtimercnt)	871	if (timercnt)
378	{	872	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
380	if (block > to) block = to;	874	if (block > to) block = to;
381	}	875	}
382		876
383	if (atimercnt)	877	if (periodiccnt)
384	{	878	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
386	if (block > to) block = to;	880	if (block > to) block = to;
387	}	881	}
388		882
389	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
390	}	884	}
391		885
392	method_poll (block);	886	method_poll (EV_A_ block);
393		887
394	/* update ev_now, do magic */	888	/* update rt_now, do magic */
395	time_update ();	889	time_update (EV_A);
396		890
397	/* put pending timers into pendign queue and reschedule them */	891	/* queue pending timers and reschedule them */
398	/* absolute timers first */	892	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	893	periodics_reify (EV_A); /* absolute timers called first */
400	/* relative timers second */
401	timers_reify (rtimers, rtimercnt, now);
402		894
		895	/* queue idle watchers unless io or timers are pending */
		896	if (!pendingcnt)
		897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		898
		899	/* queue check watchers, to be executed first */
		900	if (checkcnt)
		901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		902
403	call_pending ();	903	call_pending (EV_A);
404	}	904	}
405	while (!ev_loop_done);	905	while (activecnt && !loop_done);
406	}
407		906
408	static void	907	if (loop_done != 2)
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
		915	}
		916
		917	/*****************************************************************************/
		918
		919	inline void
		920	wlist_add (WL *head, WL elem)
410	{	921	{
411	elem->next = *head;	922	elem->next = *head;
412	*head = elem;	923	*head = elem;
413	}	924	}
414		925
415	static void	926	inline void
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	927	wlist_del (WL *head, WL elem)
417	{	928	{
418	while (*head)	929	while (*head)
419	{	930	{
420	if (*head == elem)	931	if (*head == elem)
421	{	932	{
…		…
425		936
426	head = &(*head)->next;	937	head = &(*head)->next;
427	}	938	}
428	}	939	}
429		940
430	static void	941	inline void
431	ev_start (struct ev_watcher *w, int active)	942	ev_clear_pending (EV_P_ W w)
432	{	943	{
		944	if (w->pending)
		945	{
		946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
433	w->pending = 0;	947	w->pending = 0;
		948	}
		949	}
		950
		951	inline void
		952	ev_start (EV_P_ W w, int active)
		953	{
		954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
434	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
435	}	959	}
436		960
437	static void	961	inline void
438	ev_stop (struct ev_watcher *w)	962	ev_stop (EV_P_ W w)
439	{	963	{
440	if (w->pending)	964	ev_unref (EV_A);
441	pendings [w->pending - 1].w = 0;
442
443	w->active = 0;	965	w->active = 0;
444	/* nop */
445	}	966	}
446		967
		968	/*****************************************************************************/
		969
447	void	970	void
448	evio_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
449	{	972	{
		973	int fd = w->fd;
		974
450	if (ev_is_active (w))	975	if (ev_is_active (w))
451	return;	976	return;
452		977
453	int fd = w->fd;	978	assert (("ev_io_start called with negative fd", fd >= 0));
454		979
455	ev_start ((struct ev_watcher *)w, 1);	980	ev_start (EV_A_ (W)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
458		983
459	++fdchangecnt;	984	fd_change (EV_A_ fd);
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}	985	}
463		986
464	void	987	void
465	evio_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
466	{	989	{
		990	ev_clear_pending (EV_A_ (W)w);
467	if (!ev_is_active (w))	991	if (!ev_is_active (w))
468	return;	992	return;
469		993
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
471	ev_stop ((struct ev_watcher *)w);	995	ev_stop (EV_A_ (W)w);
472		996
473	++fdchangecnt;	997	fd_change (EV_A_ w->fd);
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}	998	}
477		999
478	void	1000	void
479	evtimer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
480	{	1002	{
481	if (ev_is_active (w))	1003	if (ev_is_active (w))
482	return;	1004	return;
483		1005
484	if (w->is_abs)	1006	w->at += mn_now;
		1007
		1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1009
		1010	ev_start (EV_A_ (W)w, ++timercnt);
		1011	array_needsize (timers, timermax, timercnt, );
		1012	timers [timercnt - 1] = w;
		1013	upheap ((WT *)timers, timercnt - 1);
		1014	}
		1015
		1016	void
		1017	ev_timer_stop (EV_P_ struct ev_timer *w)
		1018	{
		1019	ev_clear_pending (EV_A_ (W)w);
		1020	if (!ev_is_active (w))
		1021	return;
		1022
		1023	if (w->active < timercnt--)
		1024	{
		1025	timers [w->active - 1] = timers [timercnt];
		1026	downheap ((WT *)timers, timercnt, w->active - 1);
485	{	1027	}
486	/* this formula differs from the one in timer_reify becuse we do not round up */	1028
		1029	w->at = w->repeat;
		1030
		1031	ev_stop (EV_A_ (W)w);
		1032	}
		1033
		1034	void
		1035	ev_timer_again (EV_P_ struct ev_timer *w)
		1036	{
		1037	if (ev_is_active (w))
		1038	{
487	if (w->repeat)	1039	if (w->repeat)
		1040	{
		1041	w->at = mn_now + w->repeat;
		1042	downheap ((WT *)timers, timercnt, w->active - 1);
		1043	}
		1044	else
		1045	ev_timer_stop (EV_A_ w);
		1046	}
		1047	else if (w->repeat)
		1048	ev_timer_start (EV_A_ w);
		1049	}
		1050
		1051	void
		1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1053	{
		1054	if (ev_is_active (w))
		1055	return;
		1056
		1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1058
		1059	/* this formula differs from the one in periodic_reify because we do not always round up */
		1060	if (w->interval)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
489		1062
490	ev_start ((struct ev_watcher *)w, ++atimercnt);	1063	ev_start (EV_A_ (W)w, ++periodiccnt);
491	array_needsize (atimers, atimermax, atimercnt, );	1064	array_needsize (periodics, periodicmax, periodiccnt, );
492	atimers [atimercnt - 1] = w;	1065	periodics [periodiccnt - 1] = w;
493	upheap (atimers, atimercnt - 1);	1066	upheap ((WT *)periodics, periodiccnt - 1);
		1067	}
		1068
		1069	void
		1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1071	{
		1072	ev_clear_pending (EV_A_ (W)w);
		1073	if (!ev_is_active (w))
		1074	return;
		1075
		1076	if (w->active < periodiccnt--)
494	}	1077	{
		1078	periodics [w->active - 1] = periodics [periodiccnt];
		1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1080	}
		1081
		1082	ev_stop (EV_A_ (W)w);
		1083	}
		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
		1089	void
		1090	ev_signal_start (EV_P_ struct ev_signal *w)
		1091	{
		1092	if (ev_is_active (w))
		1093	return;
		1094
		1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1096
		1097	ev_start (EV_A_ (W)w, 1);
		1098	array_needsize (signals, signalmax, w->signum, signals_init);
		1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1100
		1101	if (!w->next)
		1102	{
		1103	struct sigaction sa;
		1104	sa.sa_handler = sighandler;
		1105	sigfillset (&sa.sa_mask);
		1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1107	sigaction (w->signum, &sa, 0);
		1108	}
		1109	}
		1110
		1111	void
		1112	ev_signal_stop (EV_P_ struct ev_signal *w)
		1113	{
		1114	ev_clear_pending (EV_A_ (W)w);
		1115	if (!ev_is_active (w))
		1116	return;
		1117
		1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1119	ev_stop (EV_A_ (W)w);
		1120
		1121	if (!signals [w->signum - 1].head)
		1122	signal (w->signum, SIG_DFL);
		1123	}
		1124
		1125	void
		1126	ev_idle_start (EV_P_ struct ev_idle *w)
		1127	{
		1128	if (ev_is_active (w))
		1129	return;
		1130
		1131	ev_start (EV_A_ (W)w, ++idlecnt);
		1132	array_needsize (idles, idlemax, idlecnt, );
		1133	idles [idlecnt - 1] = w;
		1134	}
		1135
		1136	void
		1137	ev_idle_stop (EV_P_ struct ev_idle *w)
		1138	{
		1139	ev_clear_pending (EV_A_ (W)w);
		1140	if (ev_is_active (w))
		1141	return;
		1142
		1143	idles [w->active - 1] = idles [--idlecnt];
		1144	ev_stop (EV_A_ (W)w);
		1145	}
		1146
		1147	void
		1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1149	{
		1150	if (ev_is_active (w))
		1151	return;
		1152
		1153	ev_start (EV_A_ (W)w, ++preparecnt);
		1154	array_needsize (prepares, preparemax, preparecnt, );
		1155	prepares [preparecnt - 1] = w;
		1156	}
		1157
		1158	void
		1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1160	{
		1161	ev_clear_pending (EV_A_ (W)w);
		1162	if (ev_is_active (w))
		1163	return;
		1164
		1165	prepares [w->active - 1] = prepares [--preparecnt];
		1166	ev_stop (EV_A_ (W)w);
		1167	}
		1168
		1169	void
		1170	ev_check_start (EV_P_ struct ev_check *w)
		1171	{
		1172	if (ev_is_active (w))
		1173	return;
		1174
		1175	ev_start (EV_A_ (W)w, ++checkcnt);
		1176	array_needsize (checks, checkmax, checkcnt, );
		1177	checks [checkcnt - 1] = w;
		1178	}
		1179
		1180	void
		1181	ev_check_stop (EV_P_ struct ev_check *w)
		1182	{
		1183	ev_clear_pending (EV_A_ (W)w);
		1184	if (ev_is_active (w))
		1185	return;
		1186
		1187	checks [w->active - 1] = checks [--checkcnt];
		1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
		1191	void
		1192	ev_child_start (EV_P_ struct ev_child *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	return;
		1196
		1197	ev_start (EV_A_ (W)w, 1);
		1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1199	}
		1200
		1201	void
		1202	ev_child_stop (EV_P_ struct ev_child *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	/*****************************************************************************/
		1213
		1214	struct ev_once
		1215	{
		1216	struct ev_io io;
		1217	struct ev_timer to;
		1218	void (*cb)(int revents, void *arg);
		1219	void *arg;
		1220	};
		1221
		1222	static void
		1223	once_cb (EV_P_ struct ev_once *once, int revents)
		1224	{
		1225	void (*cb)(int revents, void *arg) = once->cb;
		1226	void *arg = once->arg;
		1227
		1228	ev_io_stop (EV_A_ &once->io);
		1229	ev_timer_stop (EV_A_ &once->to);
		1230	free (once);
		1231
		1232	cb (revents, arg);
		1233	}
		1234
		1235	static void
		1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1237	{
		1238	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1239	}
		1240
		1241	static void
		1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1243	{
		1244	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1245	}
		1246
		1247	void
		1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1249	{
		1250	struct ev_once *once = malloc (sizeof (struct ev_once));
		1251
		1252	if (!once)
		1253	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
495	else	1254	else
496	{	1255	{
497	w->at += now;	1256	once->cb = cb;
		1257	once->arg = arg;
498		1258
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1259	ev_watcher_init (&once->io, once_cb_io);
500	array_needsize (rtimers, rtimermax, rtimercnt, );	1260	if (fd >= 0)
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}
504
505	}
506
507	void
508	evtimer_stop (struct ev_timer *w)
509	{
510	if (!ev_is_active (w))
511	return;
512
513	if (w->is_abs)
514	{
515	if (w->active < atimercnt--)
516	{	1261	{
517	atimers [w->active - 1] = atimers [atimercnt];	1262	ev_io_set (&once->io, fd, events);
518	downheap (atimers, atimercnt, w->active - 1);	1263	ev_io_start (EV_A_ &once->io);
519	}	1264	}
520	}	1265
521	else	1266	ev_watcher_init (&once->to, once_cb_to);
522	{	1267	if (timeout >= 0.)
523	if (w->active < rtimercnt--)
524	{	1268	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];	1269	ev_timer_set (&once->to, timeout, 0.);
526	downheap (rtimers, rtimercnt, w->active - 1);	1270	ev_timer_start (EV_A_ &once->to);
527	}	1271	}
528	}	1272	}
529
530	ev_stop ((struct ev_watcher *)w);
531	}
532
533	void
534	evsignal_start (struct ev_signal *w)
535	{
536	if (ev_is_active (w))
537	return;
538
539	ev_start ((struct ev_watcher *)w, 1);
540	array_needsize (signals, signalmax, w->signum, signals_init);
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
542	}
543
544	void
545	evsignal_stop (struct ev_signal *w)
546	{
547	if (!ev_is_active (w))
548	return;
549
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
551	ev_stop ((struct ev_watcher *)w);
552	}	1273	}
553		1274
554	/*****************************************************************************/	1275	/*****************************************************************************/
		1276
555	#if 1	1277	#if 0
		1278
		1279	struct ev_io wio;
556		1280
557	static void	1281	static void
558	sin_cb (struct ev_io *w, int revents)	1282	sin_cb (struct ev_io *w, int revents)
559	{	1283	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1284	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
562		1286
563	static void	1287	static void
564	ocb (struct ev_timer *w, int revents)	1288	ocb (struct ev_timer *w, int revents)
565	{	1289	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1290	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
567	evtimer_stop (w);	1291	ev_timer_stop (w);
568	evtimer_start (w);	1292	ev_timer_start (w);
		1293	}
		1294
		1295	static void
		1296	scb (struct ev_signal *w, int revents)
		1297	{
		1298	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1299	ev_io_stop (&wio);
		1300	ev_io_start (&wio);
		1301	}
		1302
		1303	static void
		1304	gcb (struct ev_signal *w, int revents)
		1305	{
		1306	fprintf (stderr, "generic %x\n", revents);
		1307
569	}	1308	}
570		1309
571	int main (void)	1310	int main (void)
572	{	1311	{
573	struct ev_io sin;
574
575	ev_init (0);	1312	ev_init (0);
576		1313
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);	1314	ev_io_init (&wio, sin_cb, 0, EV_READ);
579	evio_start (&sin);	1315	ev_io_start (&wio);
580		1316
581	struct ev_timer t[10000];	1317	struct ev_timer t[10000];
582		1318
583	#if 1	1319	#if 0
584	int i;	1320	int i;
585	for (i = 0; i < 10000; ++i)	1321	for (i = 0; i < 10000; ++i)
586	{	1322	{
587	struct ev_timer *w = t + i;	1323	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);	1324	ev_watcher_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);	1325	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
590	evtimer_start (w);	1326	ev_timer_start (w);
591	if (drand48 () < 0.5)	1327	if (drand48 () < 0.5)
592	evtimer_stop (w);	1328	ev_timer_stop (w);
593	}	1329	}
594	#endif	1330	#endif
595		1331
596	struct ev_timer t1;	1332	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);	1333	ev_timer_init (&t1, ocb, 5, 10);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);	1334	ev_timer_start (&t1);
		1335
		1336	struct ev_signal sig;
		1337	ev_signal_init (&sig, scb, SIGQUIT);
		1338	ev_signal_start (&sig);
		1339
		1340	struct ev_check cw;
		1341	ev_check_init (&cw, gcb);
		1342	ev_check_start (&cw);
		1343
		1344	struct ev_idle iw;
		1345	ev_idle_init (&iw, gcb);
		1346	ev_idle_start (&iw);
600		1347
601	ev_loop (0);	1348	ev_loop (0);
602		1349
603	return 0;	1350	return 0;
604	}	1351	}

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