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Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 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>
3	#include <unistd.h>	59	#include <unistd.h>
4	#include <fcntl.h>	60	#include <fcntl.h>
5	#include <signal.h>	61	#include <signal.h>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		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
14	#ifdef CLOCK_MONOTONIC	111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	113	# define EV_USE_MONOTONIC 0
16	#endif	114	#endif
17		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	118	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	119	#endif
20	#define HAVE_SELECT 1	120
		121	/**/
21		122
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	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 */
24		127
25	#include "ev.h"	128	#include "ev.h"
26		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
27	struct ev_watcher {	144	typedef struct ev_watcher *W;
28	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"
29	};	177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
30		180
31	struct ev_watcher_list {	181	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		182
35	static ev_tstamp now, diff; /* monotonic clock */	183	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	184	# include "ev_vars.h"
37	int ev_method;	185	# undef VAR
38		186
39	static int have_monotonic; /* runtime */	187	#endif
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		188
45	/*****************************************************************************/	189	/*****************************************************************************/
46		190
47	ev_tstamp	191	inline ev_tstamp
48	ev_time (void)	192	ev_time (void)
49	{	193	{
50	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
51	struct timespec ts;	195	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	198	#else
55	struct timeval tv;	199	struct timeval tv;
56	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	202	#endif
59	}	203	}
60		204
61	static ev_tstamp	205	inline ev_tstamp
62	get_clock (void)	206	get_clock (void)
63	{	207	{
64	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
65	if (have_monotonic)	209	if (expect_true (have_monotonic))
66	{	210	{
67	struct timespec ts;	211	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	214	}
71	#endif	215	#endif
72		216
73	return ev_time ();	217	return ev_time ();
74	}	218	}
75		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
76	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
78	{ \	230	{ \
79	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
80	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	\
81	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
82	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	240	cur = newcnt; \
84	}	241	}
85		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (*base) * (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
86	/*****************************************************************************/	254	/*****************************************************************************/
87		255
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	256	static void
101	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
102	{	258	{
103	while (count--)	259	while (count--)
104	{	260	{
105	base->head = 0;	261	base->head = 0;
106	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
107	++base;	265	++base;
108	}	266	}
109	}	267	}
110		268
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	269	static void
121	event (struct ev_watcher *w, int events)	270	event (EV_P_ W w, int events)
122	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
		276	}
		277
123	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
125	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
126	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
127	}	282	}
128		283
129	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
130	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
131	{	295	{
132	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	297	struct ev_io *w;
134		298
135	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
136	{	300	{
137	int ev = w->events & events;	301	int ev = w->events & events;
138		302
139	if (ev)	303	if (ev)
140	event ((struct ev_watcher *)w, ev);	304	event (EV_A_ (W)w, ev);
141	}	305	}
142	}	306	}
143		307
		308	/*****************************************************************************/
		309
144	static void	310	static void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)	311	fd_reify (EV_P)
146	{	312	{
147	int i;	313	int i;
148		314
149	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
150	event (events [i], type);	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;
		384	}
		385	}
		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		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	}
151	}	400	}
152		401
153	/*****************************************************************************/	402	/*****************************************************************************/
154		403
155	static struct ev_timer **atimers;
156	static int atimermax, atimercnt;
157
158	static struct ev_timer **rtimers;
159	static int rtimermax, rtimercnt;
160
161	static void	404	static void
162	upheap (struct ev_timer **timers, int k)	405	upheap (WT *heap, int k)
163	{	406	{
164	struct ev_timer *w = timers [k];	407	WT w = heap [k];
165		408
166	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
167	{	410	{
168	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
169	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
170	k >>= 1;	413	k >>= 1;
171	}	414	}
172		415
173	timers [k] = w;	416	heap [k] = w;
174	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
175		418
176	}	419	}
177		420
178	static void	421	static void
179	downheap (struct ev_timer **timers, int N, int k)	422	downheap (WT *heap, int N, int k)
180	{	423	{
181	struct ev_timer *w = timers [k];	424	WT w = heap [k];
182		425
183	while (k < (N >> 1))	426	while (k < (N >> 1))
184	{	427	{
185	int j = k << 1;	428	int j = k << 1;
186		429
187	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
188	++j;	431	++j;
189		432
190	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
191	break;	434	break;
192		435
193	timers [k] = timers [j];	436	heap [k] = heap [j];
194	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
195	k = j;	438	k = j;
196	}	439	}
197		440
198	timers [k] = w;	441	heap [k] = w;
199	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
200	}	443	}
201		444
202	/*****************************************************************************/	445	/*****************************************************************************/
203		446
204	typedef struct	447	typedef struct
205	{	448	{
206	struct ev_signal *head;	449	struct ev_watcher_list *head;
207	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
208	} ANSIG;	451	} ANSIG;
209		452
210	static ANSIG *signals;	453	static ANSIG *signals;
211	static int signalmax;	454	static int signalmax;
212		455
213	static int sigpipe [2];	456	static int sigpipe [2];
214	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
215	static struct ev_io sigev;	458	static struct ev_io sigev;
216		459
217	static void	460	static void
218	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
219	{	462	{
220	while (count--)	463	while (count--)
221	{	464	{
222	base->head = 0;	465	base->head = 0;
223	base->gotsig = 0;	466	base->gotsig = 0;
		467
224	++base;	468	++base;
225	}	469	}
226	}	470	}
227		471
228	static void	472	static void
229	sighandler (int signum)	473	sighandler (int signum)
230	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
231	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
232		480
233	if (!gotsig)	481	if (!gotsig)
234	{	482	{
		483	int old_errno = errno;
235	gotsig = 1;	484	gotsig = 1;
236	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
237	}	487	}
238	}	488	}
239		489
240	static void	490	static void
241	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
242	{	492	{
243	struct ev_signal *w;	493	struct ev_watcher_list *w;
244	int sig;	494	int signum;
245		495
		496	read (sigpipe [0], &revents, 1);
246	gotsig = 0;	497	gotsig = 0;
247	read (sigpipe [0], &revents, 1);
248		498
249	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
250	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
251	{	501	{
252	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
253		503
254	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
255	event ((struct ev_watcher *)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
256	}	506	}
257	}	507	}
258		508
259	static void	509	static void
260	siginit (void)	510	siginit (EV_P)
261	{	511	{
		512	#ifndef WIN32
262	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
263	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264		515
265	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
266	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
267	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
268		520
269	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
270	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
271	}	524	}
272		525
273	/*****************************************************************************/	526	/*****************************************************************************/
274		527
275	static struct ev_idle **idles;	528	#ifndef WIN32
276	static int idlemax, idlecnt;
277		529
278	static struct ev_check **checks;	530	static struct ev_child *childs [PID_HASHSIZE];
279	static int checkmax, checkcnt;	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
280		568
281	/*****************************************************************************/	569	/*****************************************************************************/
282		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
283	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
284	# include "ev_epoll.c"	575	# include "ev_epoll.c"
285	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
286	#if HAVE_SELECT	580	#if EV_USE_SELECT
287	# include "ev_select.c"	581	# include "ev_select.c"
288	#endif	582	#endif
289		583
290	int ev_init (int flags)	584	int
		585	ev_version_major (void)
291	{	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	{
292	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
293	{	620	{
294	struct timespec ts;	621	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;	623	have_monotonic = 1;
297	}	624	}
298	#endif	625	#endif
299		626
300	ev_now = ev_time ();	627	rt_now = ev_time ();
301	now = get_clock ();	628	mn_now = get_clock ();
302	diff = ev_now - now;	629	now_floor = mn_now;
		630	rtmn_diff = rt_now - mn_now;
303		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
		645	#if EV_USE_EPOLL
		646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		653	#endif
		654	}
		655	}
		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		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
		677
		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])
304	if (pipe (sigpipe))	746	if (pipe (sigpipe))
305	return 0;	747	return 0;
306		748
307	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
308	#if HAVE_EPOLL
309	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
310	#endif
311	#if HAVE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);
313	#endif
314
315	if (ev_method)
316	{	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))
		760	{
317	evw_init (&sigev, sigcb, 0);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
318	siginit ();	763	siginit (EV_A);
319	}
320		764
321	return ev_method;	765	#ifndef WIN32
322	}	766	ev_signal_init (&childev, childcb, SIGCHLD);
323		767	ev_set_priority (&childev, EV_MAXPRI);
324	/*****************************************************************************/	768	ev_signal_start (EV_A_ &childev);
325		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
326	void ev_prefork (void)
327	{
328	}
329
330	void ev_postfork_parent (void)
331	{
332	}
333
334	void ev_postfork_child (void)
335	{
336	#if HAVE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();
339	#endif	770	#endif
		771	}
		772	else
		773	default_loop = 0;
		774	}
340		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 */
341	evio_stop (&sigev);	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);
342	close (sigpipe [0]);	808	close (sigpipe [0]);
343	close (sigpipe [1]);	809	close (sigpipe [1]);
344	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
345	siginit ();	813	siginit (EV_A);
346	}	814	}
347		815
348	/*****************************************************************************/	816	/*****************************************************************************/
349		817
350	static void	818	static void
351	fd_reify (void)	819	call_pending (EV_P)
352	{	820	{
353	int i;	821	int pri;
354		822
355	for (i = 0; i < fdchangecnt; ++i)	823	for (pri = NUMPRI; pri--; )
356	{	824	while (pendingcnt [pri])
357	int fd = fdchanges [i];
358	ANFD *anfd = anfds + fd;
359	struct ev_io *w;
360
361	int wev = 0;
362
363	for (w = anfd->head; w; w = w->next)
364	wev |= w->events;
365
366	if (anfd->wev != wev)
367	{	825	{
368	method_modify (fd, anfd->wev, wev);	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
369	anfd->wev = wev;
370	}
371	}
372		827
373	fdchangecnt = 0;
374	}
375
376	static void
377	call_pending ()
378	{
379	int i;
380
381	for (i = 0; i < pendingcnt; ++i)
382	{
383	ANPENDING *p = pendings + i;
384
385	if (p->w)	828	if (p->w)
386	{	829	{
387	p->w->pending = 0;	830	p->w->pending = 0;
388	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
389	}	832	}
390	}	833	}
391
392	pendingcnt = 0;
393	}	834	}
394		835
395	static void	836	static void
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	837	timers_reify (EV_P)
397	{	838	{
398	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
399	{	840	{
400	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
		842
		843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
401		844
402	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
403	if (w->repeat)	846	if (w->repeat)
404	{	847	{
405	if (w->is_abs)	848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
407	else
408	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
409
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
413	}	851	}
414	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)
415	{	870	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
417	--timercnt; /* maybe pass by reference instead? */	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);
418	}	874	}
		875	else
		876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
419		877
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
421	}	879	}
422	}	880	}
423		881
424	static void	882	static void
425	time_update ()	883	periodics_reschedule (EV_P)
426	{	884	{
427	int i;	885	int i;
428	ev_now = ev_time ();
429		886
430	if (have_monotonic)	887	/* adjust periodics after time jump */
		888	for (i = 0; i < periodiccnt; ++i)
431	{	889	{
432	ev_tstamp odiff = diff;	890	struct ev_periodic *w = periodics [i];
433		891
434	/* detecting time jumps is much more difficult */	892	if (w->interval)
435	for (i = 2; --i; ) /* loop a few times, before making important decisions */
436	{	893	{
437	now = get_clock ();	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
438	diff = ev_now - now;
439		895
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)	896	if (fabs (diff) >= 1e-4)
441	return; /* all is well */	897	{
		898	ev_periodic_stop (EV_A_ w);
		899	ev_periodic_start (EV_A_ w);
442		900
443	ev_now = ev_time ();	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		902	}
444	}	903	}
		904	}
		905	}
445		906
446	/* time jump detected, reschedule atimers */	907	inline int
447	for (i = 0; i < atimercnt; ++i)	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))
448	{	934	{
449	struct ev_timer *w = atimers [i];	935	ev_tstamp odiff = rtmn_diff;
450	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	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) */
451	}	952	}
452	}	953	}
453	else	954	else
		955	#endif
454	{	956	{
455	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
456	/* time jump detected, adjust rtimers */	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 */
457	for (i = 0; i < rtimercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
458	rtimers [i]->at += ev_now - now;	965	((WT)timers [i])->at += rt_now - mn_now;
		966	}
459		967
460	now = ev_now;	968	mn_now = rt_now;
461	}	969	}
462	}	970	}
463		971
464	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
465		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
466	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
467	{	988	{
468	double block;	989	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;	990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
470
471	if (checkcnt)
472	{
473	queue_events (checks, checkcnt, EV_CHECK);
474	call_pending ();
475	}
476		991
477	do	992	do
478	{	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
479	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
480	fd_reify ();	1002	fd_reify (EV_A);
481		1003
482	/* 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	{
		1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
		1017
483	if (flags & EVLOOP_NONBLOCK || idlecnt)	1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
484	block = 0.;	1019	block = 0.;
485	else	1020	else
486	{	1021	{
487	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
488		1023
489	if (rtimercnt)	1024	if (timercnt)
490	{	1025	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
492	if (block > to) block = to;	1027	if (block > to) block = to;
493	}	1028	}
494		1029
495	if (atimercnt)	1030	if (periodiccnt)
496	{	1031	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
498	if (block > to) block = to;	1033	if (block > to) block = to;
499	}	1034	}
500		1035
501	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
502	}	1037	}
503		1038
504	method_poll (block);	1039	method_poll (EV_A_ block);
505		1040
506	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
507	time_update ();	1042	time_update (EV_A);
508		1043
509	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
510	/* absolute timers first */	1045	timers_reify (EV_A); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	1046	periodics_reify (EV_A); /* absolute timers called first */
512	/* relative timers second */
513	timers_reify (rtimers, rtimercnt, now);
514		1047
515	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
516	if (!pendingcnt)	1049	if (!pendingcnt)
517	queue_events (idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
518		1051
519	/* queue check and possibly idle watchers */	1052	/* queue check watchers, to be executed first */
		1053	if (checkcnt)
520	queue_events (checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521		1055
522	call_pending ();	1056	call_pending (EV_A);
523	}	1057	}
524	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
		1059
		1060	if (loop_done != 2)
		1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
525	}	1068	}
526		1069
527	/*****************************************************************************/	1070	/*****************************************************************************/
528		1071
529	static void	1072	inline void
530	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1073	wlist_add (WL *head, WL elem)
531	{	1074	{
532	elem->next = *head;	1075	elem->next = *head;
533	*head = elem;	1076	*head = elem;
534	}	1077	}
535		1078
536	static void	1079	inline void
537	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1080	wlist_del (WL *head, WL elem)
538	{	1081	{
539	while (*head)	1082	while (*head)
540	{	1083	{
541	if (*head == elem)	1084	if (*head == elem)
542	{	1085	{
…		…
546		1089
547	head = &(*head)->next;	1090	head = &(*head)->next;
548	}	1091	}
549	}	1092	}
550		1093
551	static void	1094	inline void
552	ev_start (struct ev_watcher *w, int active)	1095	ev_clear_pending (EV_P_ W w)
553	{	1096	{
		1097	if (w->pending)
		1098	{
		1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
554	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
555	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
556	}	1112	}
557		1113
558	static void	1114	inline void
559	ev_stop (struct ev_watcher *w)	1115	ev_stop (EV_P_ W w)
560	{	1116	{
561	if (w->pending)	1117	ev_unref (EV_A);
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	1118	w->active = 0;
565	/* nop */
566	}	1119	}
567		1120
568	/*****************************************************************************/	1121	/*****************************************************************************/
569		1122
570	void	1123	void
571	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
572	{	1125	{
		1126	int fd = w->fd;
		1127
573	if (ev_is_active (w))	1128	if (ev_is_active (w))
574	return;	1129	return;
575		1130
576	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
577		1132
578	ev_start ((struct ev_watcher *)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
581		1136
582	++fdchangecnt;	1137	fd_change (EV_A_ fd);
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;
585	}	1138	}
586		1139
587	void	1140	void
588	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
589	{	1142	{
		1143	ev_clear_pending (EV_A_ (W)w);
590	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
591	return;	1145	return;
592		1146
593	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);
594	ev_stop ((struct ev_watcher *)w);	1148	ev_stop (EV_A_ (W)w);
595		1149
596	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = w->fd;
599	}	1151	}
600		1152
601	void	1153	void
602	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
603	{	1155	{
604	if (ev_is_active (w))	1156	if (ev_is_active (w))
605	return;	1157	return;
606		1158
607	if (w->is_abs)	1159	((WT)w)->at += mn_now;
		1160
		1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1162
		1163	ev_start (EV_A_ (W)w, ++timercnt);
		1164	array_needsize (timers, timermax, timercnt, );
		1165	timers [timercnt - 1] = w;
		1166	upheap ((WT *)timers, timercnt - 1);
		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
		1171	void
		1172	ev_timer_stop (EV_P_ struct ev_timer *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (!ev_is_active (w))
		1176	return;
		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
		1180	if (((W)w)->active < timercnt--)
		1181	{
		1182	timers [((W)w)->active - 1] = timers [timercnt];
		1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
608	{	1184	}
609	/* this formula differs from the one in timer_reify becuse we do not round up */	1185
		1186	((WT)w)->at = w->repeat;
		1187
		1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
		1191	void
		1192	ev_timer_again (EV_P_ struct ev_timer *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	{
610	if (w->repeat)	1196	if (w->repeat)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1197	{
612		1198	((WT)w)->at = mn_now + w->repeat;
613	ev_start ((struct ev_watcher *)w, ++atimercnt);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
614	array_needsize (atimers, atimermax, atimercnt, );	1200	}
615	atimers [atimercnt - 1] = w;
616	upheap (atimers, atimercnt - 1);
617	}
618	else	1201	else
		1202	ev_timer_stop (EV_A_ w);
619	{	1203	}
620	w->at += now;	1204	else if (w->repeat)
621		1205	ev_timer_start (EV_A_ w);
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);
623	array_needsize (rtimers, rtimermax, rtimercnt, );
624	rtimers [rtimercnt - 1] = w;
625	upheap (rtimers, rtimercnt - 1);
626	}
627
628	}	1206	}
629		1207
630	void	1208	void
631	evtimer_stop (struct ev_timer *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
632	{	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);
633	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
634	return;	1233	return;
635		1234
636	if (w->is_abs)	1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
637	{	1236
638	if (w->active < atimercnt--)	1237	if (((W)w)->active < periodiccnt--)
639	{
640	atimers [w->active - 1] = atimers [atimercnt];
641	downheap (atimers, atimercnt, w->active - 1);
642	}
643	}	1238	{
644	else	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
645	{	1241	}
646	if (w->active < rtimercnt--)
647	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];
649	downheap (rtimers, rtimercnt, w->active - 1);
650	}
651	}
652		1242
653	ev_stop ((struct ev_watcher *)w);	1243	ev_stop (EV_A_ (W)w);
654	}	1244	}
655		1245
656	void	1246	void
657	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
658	{	1248	{
659	if (ev_is_active (w))	1249	if (ev_is_active (w))
660	return;	1250	return;
661		1251
662	ev_start ((struct ev_watcher *)w, 1);	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);
663	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		1330
666	if (!w->next)	1331	if (!((WL)w)->next)
667	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
668	struct sigaction sa;	1336	struct sigaction sa;
669	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
670	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
671	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
672	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
673	}	1342	}
674	}	1343	}
675		1344
676	void	1345	void
677	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
678	{	1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
679	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
680	return;	1350	return;
681		1351
682	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	1353	ev_stop (EV_A_ (W)w);
684		1354
685	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
687	}	1357	}
688		1358
689	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
690	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
691	if (ev_is_active (w))	1365	if (ev_is_active (w))
692	return;	1366	return;
693		1367
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
695	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
696	idles [idlecnt - 1] = w;
697	}	1370	}
698		1371
699	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
700	{	1374	{
701	idles [w->active - 1] = idles [--idlecnt];	1375	ev_clear_pending (EV_A_ (W)w);
702	ev_stop ((struct ev_watcher *)w);
703	}
704
705	void evcheck_start (struct ev_check *w)
706	{
707	if (ev_is_active (w))	1376	if (ev_is_active (w))
708	return;	1377	return;
709		1378
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
711	array_needsize (checks, checkmax, checkcnt, );	1380	ev_stop (EV_A_ (W)w);
712	checks [checkcnt - 1] = w;
713	}
714
715	void evcheck_stop (struct ev_check *w)
716	{
717	checks [w->active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);
719	}	1381	}
720		1382
721	/*****************************************************************************/	1383	/*****************************************************************************/
722	#if 1
723		1384
724	static void	1385	struct ev_once
725	sin_cb (struct ev_io *w, int revents)
726	{	1386	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
728	}
729
730	static void
731	ocb (struct ev_timer *w, int revents)
732	{
733	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
734	evtimer_stop (w);
735	evtimer_start (w);
736	}
737
738	static void
739	scb (struct ev_signal *w, int revents)
740	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
742	}
743
744	static void
745	gcb (struct ev_signal *w, int revents)
746	{
747	fprintf (stderr, "generic %x\n", revents);
748	}
749
750	int main (void)
751	{
752	struct ev_io sin;	1387	struct ev_io io;
753
754	ev_init (0);
755
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);
758	evio_start (&sin);
759
760	struct ev_timer t[10000];
761
762	#if 0
763	int i;
764	for (i = 0; i < 10000; ++i)
765	{
766	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);
769	evtimer_start (w);
770	if (drand48 () < 0.5)
771	evtimer_stop (w);
772	}
773	#endif
774
775	struct ev_timer t1;	1388	struct ev_timer to;
776	evw_init (&t1, ocb, 0);	1389	void (*cb)(int revents, void *arg);
777	evtimer_set_abs (&t1, 5, 10);	1390	void *arg;
778	evtimer_start (&t1);	1391	};
779		1392
780	struct ev_signal sig;	1393	static void
781	evw_init (&sig, scb, 65535);	1394	once_cb (EV_P_ struct ev_once *once, int revents)
782	evsignal_set (&sig, SIGQUIT);	1395	{
783	evsignal_start (&sig);	1396	void (*cb)(int revents, void *arg) = once->cb;
		1397	void *arg = once->arg;
784		1398
785	struct ev_check cw;	1399	ev_io_stop (EV_A_ &once->io);
786	evw_init (&cw, gcb, 0);	1400	ev_timer_stop (EV_A_ &once->to);
787	evcheck_start (&cw);	1401	free (once);
788		1402
789	struct ev_idle iw;	1403	cb (revents, arg);
790	evw_init (&iw, gcb, 0);
791	evidle_start (&iw);
792
793	ev_loop (0);
794
795	return 0;
796	}	1404	}
797		1405
798	#endif	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	}
799		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	}
800		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));
801		1422
		1423	if (!once)
		1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1425	else
		1426	{
		1427	once->cb = cb;
		1428	once->arg = arg;
802		1429
		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	}
		1436
		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	}
		1444	}
		1445

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