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Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.53 by root, Sat Nov 3 22:31:11 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>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		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
14	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
16	#endif	84	#endif
17		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	89	#endif
20	#define HAVE_SELECT 1	90
		91	/**/
21		92
22	#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) */
23	#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 */
24		97
25	#include "ev.h"	98	#include "ev.h"
26		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
27	struct ev_watcher {	114	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	/*****************************************************************************/
		119
		120	typedef struct
		121	{
		122	struct ev_watcher_list *head;
		123	unsigned char events;
		124	unsigned char reify;
		125	} ANFD;
		126
		127	typedef struct
		128	{
		129	W w;
		130	int events;
		131	} ANPENDING;
		132
		133	#ifdef EV_MULTIPLICITY
		134	struct ev_loop
		135	{
		136	# define VAR(name,decl) decl
		137	# include "ev_vars.h"
29	};	138	};
30		139	#else
31	struct ev_watcher_list {	140	# define VAR(name,decl) static decl
32	EV_WATCHER_LIST (ev_watcher_list);	141	# include "ev_vars.h"
33	};	142	#endif
34		143	#undef VAR
35	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;
37	int ev_method;
38
39	static int have_monotonic; /* runtime */
40
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		144
45	/*****************************************************************************/	145	/*****************************************************************************/
46		146
47	ev_tstamp	147	inline ev_tstamp
48	ev_time (void)	148	ev_time (void)
49	{	149	{
50	#if HAVE_REALTIME	150	#if EV_USE_REALTIME
51	struct timespec ts;	151	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	152	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	153	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	154	#else
55	struct timeval tv;	155	struct timeval tv;
56	gettimeofday (&tv, 0);	156	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	157	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	158	#endif
59	}	159	}
60		160
61	static ev_tstamp	161	inline ev_tstamp
62	get_clock (void)	162	get_clock (void)
63	{	163	{
64	#if HAVE_MONOTONIC	164	#if EV_USE_MONOTONIC
65	if (have_monotonic)	165	if (expect_true (have_monotonic))
66	{	166	{
67	struct timespec ts;	167	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	168	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	169	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	170	}
71	#endif	171	#endif
72		172
73	return ev_time ();	173	return ev_time ();
74	}	174	}
75		175
		176	ev_tstamp
		177	ev_now (EV_P)
		178	{
		179	return rt_now;
		180	}
		181
		182	#define array_roundsize(base,n) ((n) | 4 & ~3)
		183
76	#define array_needsize(base,cur,cnt,init) \	184	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	185	if (expect_false ((cnt) > cur)) \
78	{ \	186	{ \
79	int newcnt = cur ? cur << 1 : 16; \	187	int newcnt = cur; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	188	do \
		189	{ \
		190	newcnt = array_roundsize (base, newcnt << 1); \
		191	} \
		192	while ((cnt) > newcnt); \
		193	\
81	base = realloc (base, sizeof (*base) * (newcnt)); \	194	base = realloc (base, sizeof (*base) * (newcnt)); \
82	init (base + cur, newcnt - cur); \	195	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	196	cur = newcnt; \
84	}	197	}
85		198
86	/*****************************************************************************/	199	/*****************************************************************************/
87		200
88	typedef struct
89	{
90	struct ev_io *head;
91	unsigned char wev, rev; /* want, received event set */
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void	201	static void
101	anfds_init (ANFD *base, int count)	202	anfds_init (ANFD *base, int count)
102	{	203	{
103	while (count--)	204	while (count--)
104	{	205	{
105	base->head = 0;	206	base->head = 0;
106	base->wev = base->rev = EV_NONE;	207	base->events = EV_NONE;
		208	base->reify = 0;
		209
107	++base;	210	++base;
108	}	211	}
109	}	212	}
110		213
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void	214	static void
121	event (struct ev_watcher *w, int events)	215	event (EV_P_ W w, int events)
122	{	216	{
		217	if (w->pending)
		218	{
		219	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		220	return;
		221	}
		222
123	w->pending = ++pendingcnt;	223	w->pending = ++pendingcnt [ABSPRI (w)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	224	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
125	pendings [pendingcnt - 1].w = w;	225	pendings [ABSPRI (w)][w->pending - 1].w = w;
126	pendings [pendingcnt - 1].events = events;	226	pendings [ABSPRI (w)][w->pending - 1].events = events;
127	}	227	}
128		228
129	static void	229	static void
		230	queue_events (EV_P_ W *events, int eventcnt, int type)
		231	{
		232	int i;
		233
		234	for (i = 0; i < eventcnt; ++i)
		235	event (EV_A_ events [i], type);
		236	}
		237
		238	static void
130	fd_event (int fd, int events)	239	fd_event (EV_P_ int fd, int events)
131	{	240	{
132	ANFD *anfd = anfds + fd;	241	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	242	struct ev_io *w;
134		243
135	for (w = anfd->head; w; w = w->next)	244	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
136	{	245	{
137	int ev = w->events & events;	246	int ev = w->events & events;
138		247
139	if (ev)	248	if (ev)
140	event ((struct ev_watcher *)w, ev);	249	event (EV_A_ (W)w, ev);
141	}	250	}
142	}	251	}
143		252
144	/*****************************************************************************/	253	/*****************************************************************************/
145		254
146	static struct ev_timer **atimers;
147	static int atimermax, atimercnt;
148
149	static struct ev_timer **rtimers;
150	static int rtimermax, rtimercnt;
151
152	static void	255	static void
153	upheap (struct ev_timer **timers, int k)	256	fd_reify (EV_P)
154	{	257	{
155	struct ev_timer *w = timers [k];	258	int i;
		259
		260	for (i = 0; i < fdchangecnt; ++i)
		261	{
		262	int fd = fdchanges [i];
		263	ANFD *anfd = anfds + fd;
		264	struct ev_io *w;
		265
		266	int events = 0;
		267
		268	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		269	events |= w->events;
		270
		271	anfd->reify = 0;
		272
		273	if (anfd->events != events)
		274	{
		275	method_modify (EV_A_ fd, anfd->events, events);
		276	anfd->events = events;
		277	}
		278	}
		279
		280	fdchangecnt = 0;
		281	}
		282
		283	static void
		284	fd_change (EV_P_ int fd)
		285	{
		286	if (anfds [fd].reify || fdchangecnt < 0)
		287	return;
		288
		289	anfds [fd].reify = 1;
		290
		291	++fdchangecnt;
		292	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		293	fdchanges [fdchangecnt - 1] = fd;
		294	}
		295
		296	static void
		297	fd_kill (EV_P_ int fd)
		298	{
		299	struct ev_io *w;
		300
		301	while ((w = (struct ev_io *)anfds [fd].head))
		302	{
		303	ev_io_stop (EV_A_ w);
		304	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		305	}
		306	}
		307
		308	/* called on EBADF to verify fds */
		309	static void
		310	fd_ebadf (EV_P)
		311	{
		312	int fd;
		313
		314	for (fd = 0; fd < anfdmax; ++fd)
		315	if (anfds [fd].events)
		316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		317	fd_kill (EV_A_ fd);
		318	}
		319
		320	/* called on ENOMEM in select/poll to kill some fds and retry */
		321	static void
		322	fd_enomem (EV_P)
		323	{
		324	int fd = anfdmax;
		325
		326	while (fd--)
		327	if (anfds [fd].events)
		328	{
		329	close (fd);
		330	fd_kill (EV_A_ fd);
		331	return;
		332	}
		333	}
		334
		335	/*****************************************************************************/
		336
		337	static void
		338	upheap (WT *timers, int k)
		339	{
		340	WT w = timers [k];
156		341
157	while (k && timers [k >> 1]->at > w->at)	342	while (k && timers [k >> 1]->at > w->at)
158	{	343	{
159	timers [k] = timers [k >> 1];	344	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;	345	timers [k]->active = k + 1;
…		…
165	timers [k]->active = k + 1;	350	timers [k]->active = k + 1;
166		351
167	}	352	}
168		353
169	static void	354	static void
170	downheap (struct ev_timer **timers, int N, int k)	355	downheap (WT *timers, int N, int k)
171	{	356	{
172	struct ev_timer *w = timers [k];	357	WT w = timers [k];
173		358
174	while (k < (N >> 1))	359	while (k < (N >> 1))
175	{	360	{
176	int j = k << 1;	361	int j = k << 1;
177		362
…		…
192		377
193	/*****************************************************************************/	378	/*****************************************************************************/
194		379
195	typedef struct	380	typedef struct
196	{	381	{
197	struct ev_signal *head;	382	struct ev_watcher_list *head;
198	sig_atomic_t gotsig;	383	sig_atomic_t volatile gotsig;
199	} ANSIG;	384	} ANSIG;
200		385
201	static ANSIG *signals;	386	static ANSIG *signals;
202	static int signalmax;	387	static int signalmax;
203		388
204	static int sigpipe [2];	389	static int sigpipe [2];
205	static sig_atomic_t gotsig;	390	static sig_atomic_t volatile gotsig;
206	static struct ev_io sigev;
207		391
208	static void	392	static void
209	signals_init (ANSIG *base, int count)	393	signals_init (ANSIG *base, int count)
210	{	394	{
211	while (count--)	395	while (count--)
212	{	396	{
213	base->head = 0;	397	base->head = 0;
214	base->gotsig = 0;	398	base->gotsig = 0;
		399
215	++base;	400	++base;
216	}	401	}
217	}	402	}
218		403
219	static void	404	static void
…		…
221	{	406	{
222	signals [signum - 1].gotsig = 1;	407	signals [signum - 1].gotsig = 1;
223		408
224	if (!gotsig)	409	if (!gotsig)
225	{	410	{
		411	int old_errno = errno;
226	gotsig = 1;	412	gotsig = 1;
227	write (sigpipe [1], &gotsig, 1);	413	write (sigpipe [1], &signum, 1);
		414	errno = old_errno;
228	}	415	}
229	}	416	}
230		417
231	static void	418	static void
232	sigcb (struct ev_io *iow, int revents)	419	sigcb (EV_P_ struct ev_io *iow, int revents)
233	{	420	{
234	struct ev_signal *w;	421	struct ev_watcher_list *w;
235	int sig;	422	int signum;
236		423
		424	read (sigpipe [0], &revents, 1);
237	gotsig = 0;	425	gotsig = 0;
238	read (sigpipe [0], &revents, 1);
239		426
240	for (sig = signalmax; sig--; )	427	for (signum = signalmax; signum--; )
241	if (signals [sig].gotsig)	428	if (signals [signum].gotsig)
242	{	429	{
243	signals [sig].gotsig = 0;	430	signals [signum].gotsig = 0;
244		431
245	for (w = signals [sig].head; w; w = w->next)	432	for (w = signals [signum].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	433	event (EV_A_ (W)w, EV_SIGNAL);
247	}	434	}
248	}	435	}
249		436
250	static void	437	static void
251	siginit (void)	438	siginit (EV_P)
252	{	439	{
		440	#ifndef WIN32
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	441	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	442	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255		443
256	/* rather than sort out wether we really need nb, set it */	444	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	445	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	446	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		447	#endif
259		448
260	evio_set (&sigev, sigpipe [0], EV_READ);	449	ev_io_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	450	ev_io_start (&sigev);
		451	ev_unref (EV_A); /* child watcher should not keep loop alive */
262	}	452	}
263		453
264	/*****************************************************************************/	454	/*****************************************************************************/
265		455
		456	#ifndef WIN32
		457
		458	#ifndef WCONTINUED
		459	# define WCONTINUED 0
		460	#endif
		461
		462	static void
		463	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		464	{
		465	struct ev_child *w;
		466
		467	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		468	if (w->pid == pid || !w->pid)
		469	{
		470	w->priority = sw->priority; /* need to do it *now* */
		471	w->rpid = pid;
		472	w->rstatus = status;
		473	event (EV_A_ (W)w, EV_CHILD);
		474	}
		475	}
		476
		477	static void
		478	childcb (EV_P_ struct ev_signal *sw, int revents)
		479	{
		480	int pid, status;
		481
		482	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		483	{
		484	/* make sure we are called again until all childs have been reaped */
		485	event (EV_A_ (W)sw, EV_SIGNAL);
		486
		487	child_reap (EV_A_ sw, pid, pid, status);
		488	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		489	}
		490	}
		491
		492	#endif
		493
		494	/*****************************************************************************/
		495
		496	#if EV_USE_KQUEUE
		497	# include "ev_kqueue.c"
		498	#endif
266	#if HAVE_EPOLL	499	#if EV_USE_EPOLL
267	# include "ev_epoll.c"	500	# include "ev_epoll.c"
268	#endif	501	#endif
		502	#if EV_USEV_POLL
		503	# include "ev_poll.c"
		504	#endif
269	#if HAVE_SELECT	505	#if EV_USE_SELECT
270	# include "ev_select.c"	506	# include "ev_select.c"
271	#endif	507	#endif
272		508
273	int ev_init (int flags)	509	int
		510	ev_version_major (void)
274	{	511	{
		512	return EV_VERSION_MAJOR;
		513	}
		514
		515	int
		516	ev_version_minor (void)
		517	{
		518	return EV_VERSION_MINOR;
		519	}
		520
		521	/* return true if we are running with elevated privileges and should ignore env variables */
		522	static int
		523	enable_secure (void)
		524	{
		525	#ifdef WIN32
		526	return 0;
		527	#else
		528	return getuid () != geteuid ()
		529	|| getgid () != getegid ();
		530	#endif
		531	}
		532
		533	int
		534	ev_method (EV_P)
		535	{
		536	return method;
		537	}
		538
		539	int
		540	ev_init (EV_P_ int methods)
		541	{
		542	#ifdef EV_MULTIPLICITY
		543	memset (loop, 0, sizeof (struct ev_loop));
		544	#endif
		545
		546	if (!method)
		547	{
275	#if HAVE_MONOTONIC	548	#if EV_USE_MONOTONIC
276	{	549	{
277	struct timespec ts;	550	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	551	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;	552	have_monotonic = 1;
280	}	553	}
281	#endif	554	#endif
282		555
283	ev_now = ev_time ();	556	rt_now = ev_time ();
284	now = get_clock ();	557	mn_now = get_clock ();
		558	now_floor = mn_now;
285	diff = ev_now - now;	559	diff = rt_now - mn_now;
286		560
287	if (pipe (sigpipe))	561	if (pipe (sigpipe))
288	return 0;	562	return 0;
289		563
290	ev_method = EVMETHOD_NONE;	564	if (methods == EVMETHOD_AUTO)
		565	if (!enable_secure () && getenv ("LIBmethodS"))
		566	methods = atoi (getenv ("LIBmethodS"));
		567	else
		568	methods = EVMETHOD_ANY;
		569
		570	method = 0;
		571	#if EV_USE_KQUEUE
		572	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		573	#endif
291	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	575	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
293	#endif	576	#endif
		577	#if EV_USEV_POLL
		578	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		579	#endif
294	#if HAVE_SELECT	580	#if EV_USE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);	581	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
296	#endif	582	#endif
297		583
298	if (ev_method)	584	if (method)
299	{	585	{
300	evw_init (&sigev, sigcb, 0);	586	ev_watcher_init (&sigev, sigcb);
		587	ev_set_priority (&sigev, EV_MAXPRI);
301	siginit ();	588	siginit (EV_A);
302	}
303		589
		590	#ifndef WIN32
		591	ev_signal_init (&childev, childcb, SIGCHLD);
		592	ev_set_priority (&childev, EV_MAXPRI);
		593	ev_signal_start (EV_A_ &childev);
		594	ev_unref (EV_A); /* child watcher should not keep loop alive */
		595	#endif
		596	}
		597	}
		598
304	return ev_method;	599	return method;
305	}	600	}
306		601
307	/*****************************************************************************/	602	/*****************************************************************************/
308		603
309	void ev_prefork (void)	604	void
		605	ev_fork_prepare (void)
310	{	606	{
		607	/* nop */
311	}	608	}
312		609
		610	void
313	void ev_postfork_parent (void)	611	ev_fork_parent (void)
314	{	612	{
		613	/* nop */
315	}	614	}
316		615
		616	void
317	void ev_postfork_child (void)	617	ev_fork_child (void)
318	{	618	{
319	#if HAVE_EPOLL	619	#if EV_USE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)	620	if (method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();	621	epoll_postfork_child ();
322	#endif	622	#endif
323		623
324	evio_stop (&sigev);	624	ev_io_stop (&sigev);
325	close (sigpipe [0]);	625	close (sigpipe [0]);
326	close (sigpipe [1]);	626	close (sigpipe [1]);
327	pipe (sigpipe);	627	pipe (sigpipe);
328	siginit ();	628	siginit ();
329	}	629	}
330		630
331	/*****************************************************************************/	631	/*****************************************************************************/
332		632
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void	633	static void
348	hook_call (int type)	634	call_pending (EV_P)
349	{	635	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;	636	int pri;
358		637
359	for (i = 0; i < fdchangecnt; ++i)	638	for (pri = NUMPRI; pri--; )
360	{	639	while (pendingcnt [pri])
361	int fd = fdchanges [i];
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364
365	int wev = 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev |= w->events;
369
370	if (anfd->wev != wev)
371	{	640	{
372	method_modify (fd, anfd->wev, wev);	641	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
373	anfd->wev = wev;
374	}
375	}
376		642
377	fdchangecnt = 0;
378	}
379
380	static void
381	call_pending ()
382	{
383	int i;
384
385	for (i = 0; i < pendingcnt; ++i)
386	{
387	ANPENDING *p = pendings + i;
388
389	if (p->w)	643	if (p->w)
390	{	644	{
391	p->w->pending = 0;	645	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	646	p->w->cb (EV_A_ p->w, p->events);
393	}	647	}
394	}	648	}
395
396	pendingcnt = 0;
397	}	649	}
398		650
399	static void	651	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	652	timers_reify (EV_P)
401	{	653	{
402	while (timercnt && timers [0]->at <= now)	654	while (timercnt && timers [0]->at <= mn_now)
403	{	655	{
404	struct ev_timer *w = timers [0];	656	struct ev_timer *w = timers [0];
405		657
406	/* first reschedule or stop timer */	658	/* first reschedule or stop timer */
407	if (w->repeat)	659	if (w->repeat)
408	{	660	{
409	if (w->is_abs)	661	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
411	else
412	w->at = now + w->repeat;	662	w->at = mn_now + w->repeat;
413
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	663	downheap ((WT *)timers, timercnt, 0);
417	}	664	}
418	else	665	else
		666	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		667
		668	event ((W)w, EV_TIMEOUT);
		669	}
		670	}
		671
		672	static void
		673	periodics_reify (EV_P)
		674	{
		675	while (periodiccnt && periodics [0]->at <= rt_now)
		676	{
		677	struct ev_periodic *w = periodics [0];
		678
		679	/* first reschedule or stop timer */
		680	if (w->interval)
419	{	681	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	682	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
421	--timercnt; /* maybe pass by reference instead? */	683	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		684	downheap ((WT *)periodics, periodiccnt, 0);
422	}	685	}
		686	else
		687	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
423		688
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	689	event (EV_A_ (W)w, EV_PERIODIC);
425	}	690	}
426	}	691	}
427		692
428	static void	693	static void
429	time_update ()	694	periodics_reschedule (EV_P_ ev_tstamp diff)
430	{	695	{
431	int i;	696	int i;
432	ev_now = ev_time ();
433		697
434	if (have_monotonic)	698	/* adjust periodics after time jump */
		699	for (i = 0; i < periodiccnt; ++i)
435	{	700	{
436	ev_tstamp odiff = diff;	701	struct ev_periodic *w = periodics [i];
437		702
438	/* detecting time jumps is much more difficult */	703	if (w->interval)
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */
440	{	704	{
441	now = get_clock ();	705	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
442	diff = ev_now - now;
443		706
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	707	if (fabs (diff) >= 1e-4)
445	return; /* all is well */	708	{
		709	ev_periodic_stop (EV_A_ w);
		710	ev_periodic_start (EV_A_ w);
446		711
447	ev_now = ev_time ();	712	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		713	}
448	}	714	}
		715	}
		716	}
449		717
450	/* time jump detected, reschedule atimers */	718	inline int
451	for (i = 0; i < atimercnt; ++i)	719	time_update_monotonic (EV_P)
		720	{
		721	mn_now = get_clock ();
		722
		723	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		724	{
		725	rt_now = mn_now + diff;
		726	return 0;
		727	}
		728	else
		729	{
		730	now_floor = mn_now;
		731	rt_now = ev_time ();
		732	return 1;
		733	}
		734	}
		735
		736	static void
		737	time_update (EV_P)
		738	{
		739	int i;
		740
		741	#if EV_USE_MONOTONIC
		742	if (expect_true (have_monotonic))
		743	{
		744	if (time_update_monotonic (EV_A))
452	{	745	{
453	struct ev_timer *w = atimers [i];	746	ev_tstamp odiff = diff;
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	747
		748	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		749	{
		750	diff = rt_now - mn_now;
		751
		752	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		753	return; /* all is well */
		754
		755	rt_now = ev_time ();
		756	mn_now = get_clock ();
		757	now_floor = mn_now;
		758	}
		759
		760	periodics_reschedule (EV_A_ diff - odiff);
		761	/* no timer adjustment, as the monotonic clock doesn't jump */
455	}	762	}
456	}	763	}
457	else	764	else
		765	#endif
458	{	766	{
459	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	767	rt_now = ev_time ();
460	/* time jump detected, adjust rtimers */	768
		769	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		770	{
		771	periodics_reschedule (EV_A_ rt_now - mn_now);
		772
		773	/* adjust timers. this is easy, as the offset is the same for all */
461	for (i = 0; i < rtimercnt; ++i)	774	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	775	timers [i]->at += diff;
		776	}
463		777
464	now = ev_now;	778	mn_now = rt_now;
465	}	779	}
466	}	780	}
467		781
468	int ev_loop_done;	782	void
		783	ev_ref (EV_P)
		784	{
		785	++activecnt;
		786	}
469		787
		788	void
		789	ev_unref (EV_P)
		790	{
		791	--activecnt;
		792	}
		793
		794	static int loop_done;
		795
		796	void
470	void ev_loop (int flags)	797	ev_loop (EV_P_ int flags)
471	{	798	{
472	double block;	799	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	800	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
474		801
475	do	802	do
476	{	803	{
477	hook_call (EVHOOK_PREPOLL);	804	/* queue check watchers (and execute them) */
		805	if (expect_false (preparecnt))
		806	{
		807	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		808	call_pending (EV_A);
		809	}
478		810
479	/* update fd-related kernel structures */	811	/* update fd-related kernel structures */
480	fd_reify ();	812	fd_reify (EV_A);
481		813
482	/* calculate blocking time */	814	/* calculate blocking time */
		815
		816	/* we only need this for !monotonic clockor timers, but as we basically
		817	always have timers, we just calculate it always */
		818	#if EV_USE_MONOTONIC
		819	if (expect_true (have_monotonic))
		820	time_update_monotonic (EV_A);
		821	else
		822	#endif
		823	{
		824	rt_now = ev_time ();
		825	mn_now = rt_now;
		826	}
		827
483	if (flags & EVLOOP_NONBLOCK)	828	if (flags & EVLOOP_NONBLOCK || idlecnt)
484	block = 0.;	829	block = 0.;
485	else	830	else
486	{	831	{
487	block = MAX_BLOCKTIME;	832	block = MAX_BLOCKTIME;
488		833
489	if (rtimercnt)	834	if (timercnt)
490	{	835	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	836	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
492	if (block > to) block = to;	837	if (block > to) block = to;
493	}	838	}
494		839
495	if (atimercnt)	840	if (periodiccnt)
496	{	841	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	842	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
498	if (block > to) block = to;	843	if (block > to) block = to;
499	}	844	}
500		845
501	if (block < 0.) block = 0.;	846	if (block < 0.) block = 0.;
502	}	847	}
503		848
504	method_poll (block);	849	method_poll (EV_A_ block);
505		850
506	/* update ev_now, do magic */	851	/* update rt_now, do magic */
507	time_update ();	852	time_update (EV_A);
508		853
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	854	/* queue pending timers and reschedule them */
512	/* absolute timers first */	855	timers_reify (EV_A); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	856	periodics_reify (EV_A); /* absolute timers called first */
514	/* relative timers second */
515	timers_reify (rtimers, rtimercnt, now);
516		857
		858	/* queue idle watchers unless io or timers are pending */
		859	if (!pendingcnt)
		860	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		861
		862	/* queue check watchers, to be executed first */
		863	if (checkcnt)
		864	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		865
517	call_pending ();	866	call_pending (EV_A);
518	}	867	}
519	while (!ev_loop_done);	868	while (activecnt && !loop_done);
		869
		870	if (loop_done != 2)
		871	loop_done = 0;
		872	}
		873
		874	void
		875	ev_unloop (EV_P_ int how)
		876	{
		877	loop_done = how;
520	}	878	}
521		879
522	/*****************************************************************************/	880	/*****************************************************************************/
523		881
524	static void	882	inline void
525	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	883	wlist_add (WL *head, WL elem)
526	{	884	{
527	elem->next = *head;	885	elem->next = *head;
528	*head = elem;	886	*head = elem;
529	}	887	}
530		888
531	static void	889	inline void
532	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	890	wlist_del (WL *head, WL elem)
533	{	891	{
534	while (*head)	892	while (*head)
535	{	893	{
536	if (*head == elem)	894	if (*head == elem)
537	{	895	{
…		…
541		899
542	head = &(*head)->next;	900	head = &(*head)->next;
543	}	901	}
544	}	902	}
545		903
546	static void	904	inline void
547	ev_start (struct ev_watcher *w, int active)	905	ev_clear_pending (EV_P_ W w)
548	{	906	{
		907	if (w->pending)
		908	{
		909	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	910	w->pending = 0;
		911	}
		912	}
		913
		914	inline void
		915	ev_start (EV_P_ W w, int active)
		916	{
		917	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		918	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		919
550	w->active = active;	920	w->active = active;
		921	ev_ref (EV_A);
551	}	922	}
552		923
553	static void	924	inline void
554	ev_stop (struct ev_watcher *w)	925	ev_stop (EV_P_ W w)
555	{	926	{
556	if (w->pending)	927	ev_unref (EV_A);
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	928	w->active = 0;
560	/* nop */
561	}	929	}
562		930
563	/*****************************************************************************/	931	/*****************************************************************************/
564		932
565	void	933	void
566	evio_start (struct ev_io *w)	934	ev_io_start (EV_P_ struct ev_io *w)
567	{	935	{
		936	int fd = w->fd;
		937
568	if (ev_is_active (w))	938	if (ev_is_active (w))
569	return;	939	return;
570		940
571	int fd = w->fd;	941	assert (("ev_io_start called with negative fd", fd >= 0));
572		942
573	ev_start ((struct ev_watcher *)w, 1);	943	ev_start (EV_A_ (W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	944	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	945	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		946
577	++fdchangecnt;	947	fd_change (EV_A_ fd);
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}	948	}
581		949
582	void	950	void
583	evio_stop (struct ev_io *w)	951	ev_io_stop (EV_P_ struct ev_io *w)
584	{	952	{
		953	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	954	if (!ev_is_active (w))
586	return;	955	return;
587		956
588	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	957	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	958	ev_stop (EV_A_ (W)w);
590		959
591	++fdchangecnt;	960	fd_change (EV_A_ w->fd);
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}	961	}
595		962
596	void	963	void
597	evtimer_start (struct ev_timer *w)	964	ev_timer_start (EV_P_ struct ev_timer *w)
598	{	965	{
599	if (ev_is_active (w))	966	if (ev_is_active (w))
600	return;	967	return;
601		968
602	if (w->is_abs)	969	w->at += mn_now;
		970
		971	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		972
		973	ev_start (EV_A_ (W)w, ++timercnt);
		974	array_needsize (timers, timermax, timercnt, );
		975	timers [timercnt - 1] = w;
		976	upheap ((WT *)timers, timercnt - 1);
		977	}
		978
		979	void
		980	ev_timer_stop (EV_P_ struct ev_timer *w)
		981	{
		982	ev_clear_pending (EV_A_ (W)w);
		983	if (!ev_is_active (w))
		984	return;
		985
		986	if (w->active < timercnt--)
		987	{
		988	timers [w->active - 1] = timers [timercnt];
		989	downheap ((WT *)timers, timercnt, w->active - 1);
603	{	990	}
604	/* this formula differs from the one in timer_reify becuse we do not round up */	991
		992	w->at = w->repeat;
		993
		994	ev_stop (EV_A_ (W)w);
		995	}
		996
		997	void
		998	ev_timer_again (EV_P_ struct ev_timer *w)
		999	{
		1000	if (ev_is_active (w))
		1001	{
605	if (w->repeat)	1002	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1003	{
607		1004	w->at = mn_now + w->repeat;
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1005	downheap ((WT *)timers, timercnt, w->active - 1);
609	array_needsize (atimers, atimermax, atimercnt, );	1006	}
610	atimers [atimercnt - 1] = w;
611	upheap (atimers, atimercnt - 1);
612	}
613	else	1007	else
		1008	ev_timer_stop (EV_A_ w);
614	{	1009	}
615	w->at += now;	1010	else if (w->repeat)
616		1011	ev_timer_start (EV_A_ w);
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);
618	array_needsize (rtimers, rtimermax, rtimercnt, );
619	rtimers [rtimercnt - 1] = w;
620	upheap (rtimers, rtimercnt - 1);
621	}
622
623	}	1012	}
624		1013
625	void	1014	void
626	evtimer_stop (struct ev_timer *w)	1015	ev_periodic_start (EV_P_ struct ev_periodic *w)
627	{	1016	{
		1017	if (ev_is_active (w))
		1018	return;
		1019
		1020	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1021
		1022	/* this formula differs from the one in periodic_reify because we do not always round up */
		1023	if (w->interval)
		1024	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1025
		1026	ev_start (EV_A_ (W)w, ++periodiccnt);
		1027	array_needsize (periodics, periodicmax, periodiccnt, );
		1028	periodics [periodiccnt - 1] = w;
		1029	upheap ((WT *)periodics, periodiccnt - 1);
		1030	}
		1031
		1032	void
		1033	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1034	{
		1035	ev_clear_pending (EV_A_ (W)w);
628	if (!ev_is_active (w))	1036	if (!ev_is_active (w))
629	return;	1037	return;
630		1038
631	if (w->is_abs)
632	{
633	if (w->active < atimercnt--)	1039	if (w->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	1040	{
639	else	1041	periodics [w->active - 1] = periodics [periodiccnt];
		1042	downheap ((WT *)periodics, periodiccnt, w->active - 1);
640	{	1043	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1044
648	ev_stop ((struct ev_watcher *)w);	1045	ev_stop (EV_A_ (W)w);
649	}	1046	}
650		1047
		1048	#ifndef SA_RESTART
		1049	# define SA_RESTART 0
		1050	#endif
		1051
651	void	1052	void
652	evsignal_start (struct ev_signal *w)	1053	ev_signal_start (EV_P_ struct ev_signal *w)
653	{	1054	{
654	if (ev_is_active (w))	1055	if (ev_is_active (w))
655	return;	1056	return;
656		1057
657	ev_start ((struct ev_watcher *)w, 1);	1058	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1059
		1060	ev_start (EV_A_ (W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	1061	array_needsize (signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1062	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		1063
661	if (!w->next)	1064	if (!w->next)
662	{	1065	{
663	struct sigaction sa;	1066	struct sigaction sa;
664	sa.sa_handler = sighandler;	1067	sa.sa_handler = sighandler;
665	sigfillset (&sa.sa_mask);	1068	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1069	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1070	sigaction (w->signum, &sa, 0);
668	}	1071	}
669	}	1072	}
670		1073
671	void	1074	void
672	evsignal_stop (struct ev_signal *w)	1075	ev_signal_stop (EV_P_ struct ev_signal *w)
673	{	1076	{
		1077	ev_clear_pending (EV_A_ (W)w);
674	if (!ev_is_active (w))	1078	if (!ev_is_active (w))
675	return;	1079	return;
676		1080
677	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1081	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1082	ev_stop (EV_A_ (W)w);
679		1083
680	if (!signals [w->signum - 1].head)	1084	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1085	signal (w->signum, SIG_DFL);
682	}	1086	}
683		1087
		1088	void
		1089	ev_idle_start (EV_P_ struct ev_idle *w)
		1090	{
		1091	if (ev_is_active (w))
		1092	return;
		1093
		1094	ev_start (EV_A_ (W)w, ++idlecnt);
		1095	array_needsize (idles, idlemax, idlecnt, );
		1096	idles [idlecnt - 1] = w;
		1097	}
		1098
		1099	void
		1100	ev_idle_stop (EV_P_ struct ev_idle *w)
		1101	{
		1102	ev_clear_pending (EV_A_ (W)w);
		1103	if (ev_is_active (w))
		1104	return;
		1105
		1106	idles [w->active - 1] = idles [--idlecnt];
		1107	ev_stop (EV_A_ (W)w);
		1108	}
		1109
		1110	void
		1111	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1112	{
		1113	if (ev_is_active (w))
		1114	return;
		1115
		1116	ev_start (EV_A_ (W)w, ++preparecnt);
		1117	array_needsize (prepares, preparemax, preparecnt, );
		1118	prepares [preparecnt - 1] = w;
		1119	}
		1120
		1121	void
		1122	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1123	{
		1124	ev_clear_pending (EV_A_ (W)w);
		1125	if (ev_is_active (w))
		1126	return;
		1127
		1128	prepares [w->active - 1] = prepares [--preparecnt];
		1129	ev_stop (EV_A_ (W)w);
		1130	}
		1131
		1132	void
		1133	ev_check_start (EV_P_ struct ev_check *w)
		1134	{
		1135	if (ev_is_active (w))
		1136	return;
		1137
		1138	ev_start (EV_A_ (W)w, ++checkcnt);
		1139	array_needsize (checks, checkmax, checkcnt, );
		1140	checks [checkcnt - 1] = w;
		1141	}
		1142
		1143	void
		1144	ev_check_stop (EV_P_ struct ev_check *w)
		1145	{
		1146	ev_clear_pending (EV_A_ (W)w);
		1147	if (ev_is_active (w))
		1148	return;
		1149
		1150	checks [w->active - 1] = checks [--checkcnt];
		1151	ev_stop (EV_A_ (W)w);
		1152	}
		1153
		1154	void
		1155	ev_child_start (EV_P_ struct ev_child *w)
		1156	{
		1157	if (ev_is_active (w))
		1158	return;
		1159
		1160	ev_start (EV_A_ (W)w, 1);
		1161	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1162	}
		1163
		1164	void
		1165	ev_child_stop (EV_P_ struct ev_child *w)
		1166	{
		1167	ev_clear_pending (EV_A_ (W)w);
		1168	if (ev_is_active (w))
		1169	return;
		1170
		1171	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1172	ev_stop (EV_A_ (W)w);
		1173	}
		1174
684	/*****************************************************************************/	1175	/*****************************************************************************/
		1176
		1177	struct ev_once
		1178	{
		1179	struct ev_io io;
		1180	struct ev_timer to;
		1181	void (*cb)(int revents, void *arg);
		1182	void *arg;
		1183	};
		1184
		1185	static void
		1186	once_cb (EV_P_ struct ev_once *once, int revents)
		1187	{
		1188	void (*cb)(int revents, void *arg) = once->cb;
		1189	void *arg = once->arg;
		1190
		1191	ev_io_stop (EV_A_ &once->io);
		1192	ev_timer_stop (EV_A_ &once->to);
		1193	free (once);
		1194
		1195	cb (revents, arg);
		1196	}
		1197
		1198	static void
		1199	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1200	{
		1201	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1202	}
		1203
		1204	static void
		1205	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1206	{
		1207	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1208	}
		1209
		1210	void
		1211	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1212	{
		1213	struct ev_once *once = malloc (sizeof (struct ev_once));
		1214
		1215	if (!once)
		1216	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1217	else
		1218	{
		1219	once->cb = cb;
		1220	once->arg = arg;
		1221
		1222	ev_watcher_init (&once->io, once_cb_io);
		1223	if (fd >= 0)
		1224	{
		1225	ev_io_set (&once->io, fd, events);
		1226	ev_io_start (EV_A_ &once->io);
		1227	}
		1228
		1229	ev_watcher_init (&once->to, once_cb_to);
		1230	if (timeout >= 0.)
		1231	{
		1232	ev_timer_set (&once->to, timeout, 0.);
		1233	ev_timer_start (EV_A_ &once->to);
		1234	}
		1235	}
		1236	}
		1237
		1238	/*****************************************************************************/
		1239
685	#if 1	1240	#if 0
		1241
		1242	struct ev_io wio;
686		1243
687	static void	1244	static void
688	sin_cb (struct ev_io *w, int revents)	1245	sin_cb (struct ev_io *w, int revents)
689	{	1246	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1247	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
692		1249
693	static void	1250	static void
694	ocb (struct ev_timer *w, int revents)	1251	ocb (struct ev_timer *w, int revents)
695	{	1252	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1253	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
697	evtimer_stop (w);	1254	ev_timer_stop (w);
698	evtimer_start (w);	1255	ev_timer_start (w);
699	}	1256	}
700		1257
701	static void	1258	static void
702	scb (struct ev_signal *w, int revents)	1259	scb (struct ev_signal *w, int revents)
703	{	1260	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1261	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1262	ev_io_stop (&wio);
		1263	ev_io_start (&wio);
		1264	}
		1265
		1266	static void
		1267	gcb (struct ev_signal *w, int revents)
		1268	{
		1269	fprintf (stderr, "generic %x\n", revents);
		1270
705	}	1271	}
706		1272
707	int main (void)	1273	int main (void)
708	{	1274	{
709	struct ev_io sin;
710
711	ev_init (0);	1275	ev_init (0);
712		1276
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);	1277	ev_io_init (&wio, sin_cb, 0, EV_READ);
715	evio_start (&sin);	1278	ev_io_start (&wio);
716		1279
717	struct ev_timer t[10000];	1280	struct ev_timer t[10000];
718		1281
719	#if 1	1282	#if 0
720	int i;	1283	int i;
721	for (i = 0; i < 10000; ++i)	1284	for (i = 0; i < 10000; ++i)
722	{	1285	{
723	struct ev_timer *w = t + i;	1286	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);	1287	ev_watcher_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);	1288	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
726	evtimer_start (w);	1289	ev_timer_start (w);
727	if (drand48 () < 0.5)	1290	if (drand48 () < 0.5)
728	evtimer_stop (w);	1291	ev_timer_stop (w);
729	}	1292	}
730	#endif	1293	#endif
731		1294
732	struct ev_timer t1;	1295	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);	1296	ev_timer_init (&t1, ocb, 5, 10);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);	1297	ev_timer_start (&t1);
736		1298
737	struct ev_signal sig;	1299	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);	1300	ev_signal_init (&sig, scb, SIGQUIT);
740	evsignal_start (&sig);	1301	ev_signal_start (&sig);
		1302
		1303	struct ev_check cw;
		1304	ev_check_init (&cw, gcb);
		1305	ev_check_start (&cw);
		1306
		1307	struct ev_idle iw;
		1308	ev_idle_init (&iw, gcb);
		1309	ev_idle_start (&iw);
741		1310
742	ev_loop (0);	1311	ev_loop (0);
743		1312
744	return 0;	1313	return 0;
745	}	1314	}

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